#include <mach/cp_intc.h>
#include <mach/da8xx.h>
- #include <mach/nand.h>
+ #include <linux/platform_data/mtd-davinci.h>
#include <mach/mux.h>
- #include <mach/aemif.h>
- #include <mach/spi.h>
+ #include <linux/platform_data/mtd-davinci-aemif.h>
+ #include <linux/platform_data/spi-davinci.h>
+#include <media/tvp514x.h>
+#include <media/adv7343.h>
+
#define DA850_EVM_PHY_ID "davinci_mdio-0:00"
#define DA850_LCD_PWR_PIN GPIO_TO_PIN(2, 8)
#define DA850_LCD_BL_PIN GPIO_TO_PIN(2, 15)
#include <mach/serial.h>
#include <mach/edma.h>
- #include <mach/i2c.h>
#include <mach/asp.h>
- #include <mach/mmc.h>
- #include <mach/usb.h>
#include <mach/pm.h>
- #include <mach/spi.h>
+ #include <linux/platform_data/i2c-davinci.h>
+ #include <linux/platform_data/mmc-davinci.h>
+ #include <linux/platform_data/usb-davinci.h>
+ #include <linux/platform_data/spi-davinci.h>
+#include <media/davinci/vpif_types.h>
+
extern void __iomem *da8xx_syscfg0_base;
extern void __iomem *da8xx_syscfg1_base;
#include <plat/backlight.h>
#include <plat/fb.h>
#include <plat/mfc.h>
+#include <plat/hdmi.h>
- #include <mach/ohci.h>
+ #include <linux/platform_data/usb-exynos.h>
#include <mach/map.h>
#include <drm/exynos_drm.h>
#include <plat/gpio-cfg.h>
#include <plat/backlight.h>
#include <plat/mfc.h>
- #include <plat/ehci.h>
+ #include <linux/platform_data/usb-ehci-s5p.h>
#include <plat/clock.h>
+#include <plat/hdmi.h>
#include <mach/map.h>
- #include <mach/ohci.h>
+ #include <linux/platform_data/usb-exynos.h>
#include <drm/exynos_drm.h>
#include "common.h"
--- /dev/null
- #include <mach/i2c.h>
+/*
+ * Copyright (C) 2010 Texas Instruments Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation version 2.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/ctype.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/videodev2.h>
+#include <linux/slab.h>
+
+#include <mach/hardware.h>
+#include <mach/mux.h>
++#include <linux/platform_data/i2c-davinci.h>
+
+#include <linux/io.h>
+
+#include <media/davinci/vpbe_types.h>
+#include <media/davinci/vpbe_venc.h>
+#include <media/davinci/vpss.h>
+#include <media/v4l2-device.h>
+
+#include "vpbe_venc_regs.h"
+
+#define MODULE_NAME VPBE_VENC_SUBDEV_NAME
+
+static int debug = 2;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Debug level 0-2");
+
+struct venc_state {
+ struct v4l2_subdev sd;
+ struct venc_callback *callback;
+ struct venc_platform_data *pdata;
+ struct device *pdev;
+ u32 output;
+ v4l2_std_id std;
+ spinlock_t lock;
+ void __iomem *venc_base;
+ void __iomem *vdaccfg_reg;
+};
+
+static inline struct venc_state *to_state(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct venc_state, sd);
+}
+
+static inline u32 venc_read(struct v4l2_subdev *sd, u32 offset)
+{
+ struct venc_state *venc = to_state(sd);
+
+ return readl(venc->venc_base + offset);
+}
+
+static inline u32 venc_write(struct v4l2_subdev *sd, u32 offset, u32 val)
+{
+ struct venc_state *venc = to_state(sd);
+
+ writel(val, (venc->venc_base + offset));
+
+ return val;
+}
+
+static inline u32 venc_modify(struct v4l2_subdev *sd, u32 offset,
+ u32 val, u32 mask)
+{
+ u32 new_val = (venc_read(sd, offset) & ~mask) | (val & mask);
+
+ venc_write(sd, offset, new_val);
+
+ return new_val;
+}
+
+static inline u32 vdaccfg_write(struct v4l2_subdev *sd, u32 val)
+{
+ struct venc_state *venc = to_state(sd);
+
+ writel(val, venc->vdaccfg_reg);
+
+ val = readl(venc->vdaccfg_reg);
+
+ return val;
+}
+
+#define VDAC_COMPONENT 0x543
+#define VDAC_S_VIDEO 0x210
+/* This function sets the dac of the VPBE for various outputs
+ */
+static int venc_set_dac(struct v4l2_subdev *sd, u32 out_index)
+{
+ switch (out_index) {
+ case 0:
+ v4l2_dbg(debug, 1, sd, "Setting output to Composite\n");
+ venc_write(sd, VENC_DACSEL, 0);
+ break;
+ case 1:
+ v4l2_dbg(debug, 1, sd, "Setting output to Component\n");
+ venc_write(sd, VENC_DACSEL, VDAC_COMPONENT);
+ break;
+ case 2:
+ v4l2_dbg(debug, 1, sd, "Setting output to S-video\n");
+ venc_write(sd, VENC_DACSEL, VDAC_S_VIDEO);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void venc_enabledigitaloutput(struct v4l2_subdev *sd, int benable)
+{
+ struct venc_state *venc = to_state(sd);
+ struct venc_platform_data *pdata = venc->pdata;
+ v4l2_dbg(debug, 2, sd, "venc_enabledigitaloutput\n");
+
+ if (benable) {
+ venc_write(sd, VENC_VMOD, 0);
+ venc_write(sd, VENC_CVBS, 0);
+ venc_write(sd, VENC_LCDOUT, 0);
+ venc_write(sd, VENC_HSPLS, 0);
+ venc_write(sd, VENC_HSTART, 0);
+ venc_write(sd, VENC_HVALID, 0);
+ venc_write(sd, VENC_HINT, 0);
+ venc_write(sd, VENC_VSPLS, 0);
+ venc_write(sd, VENC_VSTART, 0);
+ venc_write(sd, VENC_VVALID, 0);
+ venc_write(sd, VENC_VINT, 0);
+ venc_write(sd, VENC_YCCCTL, 0);
+ venc_write(sd, VENC_DACSEL, 0);
+
+ } else {
+ venc_write(sd, VENC_VMOD, 0);
+ /* disable VCLK output pin enable */
+ venc_write(sd, VENC_VIDCTL, 0x141);
+
+ /* Disable output sync pins */
+ venc_write(sd, VENC_SYNCCTL, 0);
+
+ /* Disable DCLOCK */
+ venc_write(sd, VENC_DCLKCTL, 0);
+ venc_write(sd, VENC_DRGBX1, 0x0000057C);
+
+ /* Disable LCD output control (accepting default polarity) */
+ venc_write(sd, VENC_LCDOUT, 0);
+ if (pdata->venc_type != VPBE_VERSION_3)
+ venc_write(sd, VENC_CMPNT, 0x100);
+ venc_write(sd, VENC_HSPLS, 0);
+ venc_write(sd, VENC_HINT, 0);
+ venc_write(sd, VENC_HSTART, 0);
+ venc_write(sd, VENC_HVALID, 0);
+
+ venc_write(sd, VENC_VSPLS, 0);
+ venc_write(sd, VENC_VINT, 0);
+ venc_write(sd, VENC_VSTART, 0);
+ venc_write(sd, VENC_VVALID, 0);
+
+ venc_write(sd, VENC_HSDLY, 0);
+ venc_write(sd, VENC_VSDLY, 0);
+
+ venc_write(sd, VENC_YCCCTL, 0);
+ venc_write(sd, VENC_VSTARTA, 0);
+
+ /* Set OSD clock and OSD Sync Adavance registers */
+ venc_write(sd, VENC_OSDCLK0, 1);
+ venc_write(sd, VENC_OSDCLK1, 2);
+ }
+}
+
+#define VDAC_CONFIG_SD_V3 0x0E21A6B6
+#define VDAC_CONFIG_SD_V2 0x081141CF
+/*
+ * setting NTSC mode
+ */
+static int venc_set_ntsc(struct v4l2_subdev *sd)
+{
+ u32 val;
+ struct venc_state *venc = to_state(sd);
+ struct venc_platform_data *pdata = venc->pdata;
+
+ v4l2_dbg(debug, 2, sd, "venc_set_ntsc\n");
+
+ /* Setup clock at VPSS & VENC for SD */
+ vpss_enable_clock(VPSS_VENC_CLOCK_SEL, 1);
+ if (pdata->setup_clock(VPBE_ENC_STD, V4L2_STD_525_60) < 0)
+ return -EINVAL;
+
+ venc_enabledigitaloutput(sd, 0);
+
+ if (pdata->venc_type == VPBE_VERSION_3) {
+ venc_write(sd, VENC_CLKCTL, 0x01);
+ venc_write(sd, VENC_VIDCTL, 0);
+ val = vdaccfg_write(sd, VDAC_CONFIG_SD_V3);
+ } else if (pdata->venc_type == VPBE_VERSION_2) {
+ venc_write(sd, VENC_CLKCTL, 0x01);
+ venc_write(sd, VENC_VIDCTL, 0);
+ vdaccfg_write(sd, VDAC_CONFIG_SD_V2);
+ } else {
+ /* to set VENC CLK DIV to 1 - final clock is 54 MHz */
+ venc_modify(sd, VENC_VIDCTL, 0, 1 << 1);
+ /* Set REC656 Mode */
+ venc_write(sd, VENC_YCCCTL, 0x1);
+ venc_modify(sd, VENC_VDPRO, 0, VENC_VDPRO_DAFRQ);
+ venc_modify(sd, VENC_VDPRO, 0, VENC_VDPRO_DAUPS);
+ }
+
+ venc_write(sd, VENC_VMOD, 0);
+ venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
+ VENC_VMOD_VIE);
+ venc_modify(sd, VENC_VMOD, (0 << VENC_VMOD_VMD), VENC_VMOD_VMD);
+ venc_modify(sd, VENC_VMOD, (0 << VENC_VMOD_TVTYP_SHIFT),
+ VENC_VMOD_TVTYP);
+ venc_write(sd, VENC_DACTST, 0x0);
+ venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);
+
+ return 0;
+}
+
+/*
+ * setting PAL mode
+ */
+static int venc_set_pal(struct v4l2_subdev *sd)
+{
+ struct venc_state *venc = to_state(sd);
+ struct venc_platform_data *pdata = venc->pdata;
+
+ v4l2_dbg(debug, 2, sd, "venc_set_pal\n");
+
+ /* Setup clock at VPSS & VENC for SD */
+ vpss_enable_clock(VPSS_VENC_CLOCK_SEL, 1);
+ if (venc->pdata->setup_clock(VPBE_ENC_STD, V4L2_STD_625_50) < 0)
+ return -EINVAL;
+
+ venc_enabledigitaloutput(sd, 0);
+
+ if (pdata->venc_type == VPBE_VERSION_3) {
+ venc_write(sd, VENC_CLKCTL, 0x1);
+ venc_write(sd, VENC_VIDCTL, 0);
+ vdaccfg_write(sd, VDAC_CONFIG_SD_V3);
+ } else if (pdata->venc_type == VPBE_VERSION_2) {
+ venc_write(sd, VENC_CLKCTL, 0x1);
+ venc_write(sd, VENC_VIDCTL, 0);
+ vdaccfg_write(sd, VDAC_CONFIG_SD_V2);
+ } else {
+ /* to set VENC CLK DIV to 1 - final clock is 54 MHz */
+ venc_modify(sd, VENC_VIDCTL, 0, 1 << 1);
+ /* Set REC656 Mode */
+ venc_write(sd, VENC_YCCCTL, 0x1);
+ }
+
+ venc_modify(sd, VENC_SYNCCTL, 1 << VENC_SYNCCTL_OVD_SHIFT,
+ VENC_SYNCCTL_OVD);
+ venc_write(sd, VENC_VMOD, 0);
+ venc_modify(sd, VENC_VMOD,
+ (1 << VENC_VMOD_VIE_SHIFT),
+ VENC_VMOD_VIE);
+ venc_modify(sd, VENC_VMOD,
+ (0 << VENC_VMOD_VMD), VENC_VMOD_VMD);
+ venc_modify(sd, VENC_VMOD,
+ (1 << VENC_VMOD_TVTYP_SHIFT),
+ VENC_VMOD_TVTYP);
+ venc_write(sd, VENC_DACTST, 0x0);
+ venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);
+
+ return 0;
+}
+
+#define VDAC_CONFIG_HD_V2 0x081141EF
+/*
+ * venc_set_480p59_94
+ *
+ * This function configures the video encoder to EDTV(525p) component setting.
+ */
+static int venc_set_480p59_94(struct v4l2_subdev *sd)
+{
+ struct venc_state *venc = to_state(sd);
+ struct venc_platform_data *pdata = venc->pdata;
+
+ v4l2_dbg(debug, 2, sd, "venc_set_480p59_94\n");
+ if ((pdata->venc_type != VPBE_VERSION_1) &&
+ (pdata->venc_type != VPBE_VERSION_2))
+ return -EINVAL;
+
+ /* Setup clock at VPSS & VENC for SD */
+ if (pdata->setup_clock(VPBE_ENC_CUSTOM_TIMINGS, 27000000) < 0)
+ return -EINVAL;
+
+ venc_enabledigitaloutput(sd, 0);
+
+ if (pdata->venc_type == VPBE_VERSION_2)
+ vdaccfg_write(sd, VDAC_CONFIG_HD_V2);
+ venc_write(sd, VENC_OSDCLK0, 0);
+ venc_write(sd, VENC_OSDCLK1, 1);
+
+ if (pdata->venc_type == VPBE_VERSION_1) {
+ venc_modify(sd, VENC_VDPRO, VENC_VDPRO_DAFRQ,
+ VENC_VDPRO_DAFRQ);
+ venc_modify(sd, VENC_VDPRO, VENC_VDPRO_DAUPS,
+ VENC_VDPRO_DAUPS);
+ }
+
+ venc_write(sd, VENC_VMOD, 0);
+ venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
+ VENC_VMOD_VIE);
+ venc_modify(sd, VENC_VMOD, VENC_VMOD_HDMD, VENC_VMOD_HDMD);
+ venc_modify(sd, VENC_VMOD, (HDTV_525P << VENC_VMOD_TVTYP_SHIFT),
+ VENC_VMOD_TVTYP);
+ venc_modify(sd, VENC_VMOD, VENC_VMOD_VDMD_YCBCR8 <<
+ VENC_VMOD_VDMD_SHIFT, VENC_VMOD_VDMD);
+
+ venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);
+
+ return 0;
+}
+
+/*
+ * venc_set_625p
+ *
+ * This function configures the video encoder to HDTV(625p) component setting
+ */
+static int venc_set_576p50(struct v4l2_subdev *sd)
+{
+ struct venc_state *venc = to_state(sd);
+ struct venc_platform_data *pdata = venc->pdata;
+
+ v4l2_dbg(debug, 2, sd, "venc_set_576p50\n");
+
+ if ((pdata->venc_type != VPBE_VERSION_1) &&
+ (pdata->venc_type != VPBE_VERSION_2))
+ return -EINVAL;
+ /* Setup clock at VPSS & VENC for SD */
+ if (pdata->setup_clock(VPBE_ENC_CUSTOM_TIMINGS, 27000000) < 0)
+ return -EINVAL;
+
+ venc_enabledigitaloutput(sd, 0);
+
+ if (pdata->venc_type == VPBE_VERSION_2)
+ vdaccfg_write(sd, VDAC_CONFIG_HD_V2);
+
+ venc_write(sd, VENC_OSDCLK0, 0);
+ venc_write(sd, VENC_OSDCLK1, 1);
+
+ if (pdata->venc_type == VPBE_VERSION_1) {
+ venc_modify(sd, VENC_VDPRO, VENC_VDPRO_DAFRQ,
+ VENC_VDPRO_DAFRQ);
+ venc_modify(sd, VENC_VDPRO, VENC_VDPRO_DAUPS,
+ VENC_VDPRO_DAUPS);
+ }
+
+ venc_write(sd, VENC_VMOD, 0);
+ venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
+ VENC_VMOD_VIE);
+ venc_modify(sd, VENC_VMOD, VENC_VMOD_HDMD, VENC_VMOD_HDMD);
+ venc_modify(sd, VENC_VMOD, (HDTV_625P << VENC_VMOD_TVTYP_SHIFT),
+ VENC_VMOD_TVTYP);
+
+ venc_modify(sd, VENC_VMOD, VENC_VMOD_VDMD_YCBCR8 <<
+ VENC_VMOD_VDMD_SHIFT, VENC_VMOD_VDMD);
+ venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);
+
+ return 0;
+}
+
+/*
+ * venc_set_720p60_internal - Setup 720p60 in venc for dm365 only
+ */
+static int venc_set_720p60_internal(struct v4l2_subdev *sd)
+{
+ struct venc_state *venc = to_state(sd);
+ struct venc_platform_data *pdata = venc->pdata;
+
+ if (pdata->setup_clock(VPBE_ENC_CUSTOM_TIMINGS, 74250000) < 0)
+ return -EINVAL;
+
+ venc_enabledigitaloutput(sd, 0);
+
+ venc_write(sd, VENC_OSDCLK0, 0);
+ venc_write(sd, VENC_OSDCLK1, 1);
+
+ venc_write(sd, VENC_VMOD, 0);
+ /* DM365 component HD mode */
+ venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
+ VENC_VMOD_VIE);
+ venc_modify(sd, VENC_VMOD, VENC_VMOD_HDMD, VENC_VMOD_HDMD);
+ venc_modify(sd, VENC_VMOD, (HDTV_720P << VENC_VMOD_TVTYP_SHIFT),
+ VENC_VMOD_TVTYP);
+ venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);
+ venc_write(sd, VENC_XHINTVL, 0);
+ return 0;
+}
+
+/*
+ * venc_set_1080i30_internal - Setup 1080i30 in venc for dm365 only
+ */
+static int venc_set_1080i30_internal(struct v4l2_subdev *sd)
+{
+ struct venc_state *venc = to_state(sd);
+ struct venc_platform_data *pdata = venc->pdata;
+
+ if (pdata->setup_clock(VPBE_ENC_CUSTOM_TIMINGS, 74250000) < 0)
+ return -EINVAL;
+
+ venc_enabledigitaloutput(sd, 0);
+
+ venc_write(sd, VENC_OSDCLK0, 0);
+ venc_write(sd, VENC_OSDCLK1, 1);
+
+
+ venc_write(sd, VENC_VMOD, 0);
+ /* DM365 component HD mode */
+ venc_modify(sd, VENC_VMOD, (1 << VENC_VMOD_VIE_SHIFT),
+ VENC_VMOD_VIE);
+ venc_modify(sd, VENC_VMOD, VENC_VMOD_HDMD, VENC_VMOD_HDMD);
+ venc_modify(sd, VENC_VMOD, (HDTV_1080I << VENC_VMOD_TVTYP_SHIFT),
+ VENC_VMOD_TVTYP);
+ venc_modify(sd, VENC_VMOD, VENC_VMOD_VENC, VENC_VMOD_VENC);
+ venc_write(sd, VENC_XHINTVL, 0);
+ return 0;
+}
+
+static int venc_s_std_output(struct v4l2_subdev *sd, v4l2_std_id norm)
+{
+ v4l2_dbg(debug, 1, sd, "venc_s_std_output\n");
+
+ if (norm & V4L2_STD_525_60)
+ return venc_set_ntsc(sd);
+ else if (norm & V4L2_STD_625_50)
+ return venc_set_pal(sd);
+
+ return -EINVAL;
+}
+
+static int venc_s_dv_timings(struct v4l2_subdev *sd,
+ struct v4l2_dv_timings *dv_timings)
+{
+ struct venc_state *venc = to_state(sd);
+ u32 height = dv_timings->bt.height;
+ int ret;
+
+ v4l2_dbg(debug, 1, sd, "venc_s_dv_timings\n");
+
+ if (height == 576)
+ return venc_set_576p50(sd);
+ else if (height == 480)
+ return venc_set_480p59_94(sd);
+ else if ((height == 720) &&
+ (venc->pdata->venc_type == VPBE_VERSION_2)) {
+ /* TBD setup internal 720p mode here */
+ ret = venc_set_720p60_internal(sd);
+ /* for DM365 VPBE, there is DAC inside */
+ vdaccfg_write(sd, VDAC_CONFIG_HD_V2);
+ return ret;
+ } else if ((height == 1080) &&
+ (venc->pdata->venc_type == VPBE_VERSION_2)) {
+ /* TBD setup internal 1080i mode here */
+ ret = venc_set_1080i30_internal(sd);
+ /* for DM365 VPBE, there is DAC inside */
+ vdaccfg_write(sd, VDAC_CONFIG_HD_V2);
+ return ret;
+ }
+ return -EINVAL;
+}
+
+static int venc_s_routing(struct v4l2_subdev *sd, u32 input, u32 output,
+ u32 config)
+{
+ struct venc_state *venc = to_state(sd);
+ int ret;
+
+ v4l2_dbg(debug, 1, sd, "venc_s_routing\n");
+
+ ret = venc_set_dac(sd, output);
+ if (!ret)
+ venc->output = output;
+
+ return ret;
+}
+
+static long venc_ioctl(struct v4l2_subdev *sd,
+ unsigned int cmd,
+ void *arg)
+{
+ u32 val;
+
+ switch (cmd) {
+ case VENC_GET_FLD:
+ val = venc_read(sd, VENC_VSTAT);
+ *((int *)arg) = ((val & VENC_VSTAT_FIDST) ==
+ VENC_VSTAT_FIDST);
+ break;
+ default:
+ v4l2_err(sd, "Wrong IOCTL cmd\n");
+ break;
+ }
+
+ return 0;
+}
+
+static const struct v4l2_subdev_core_ops venc_core_ops = {
+ .ioctl = venc_ioctl,
+};
+
+static const struct v4l2_subdev_video_ops venc_video_ops = {
+ .s_routing = venc_s_routing,
+ .s_std_output = venc_s_std_output,
+ .s_dv_timings = venc_s_dv_timings,
+};
+
+static const struct v4l2_subdev_ops venc_ops = {
+ .core = &venc_core_ops,
+ .video = &venc_video_ops,
+};
+
+static int venc_initialize(struct v4l2_subdev *sd)
+{
+ struct venc_state *venc = to_state(sd);
+ int ret;
+
+ /* Set default to output to composite and std to NTSC */
+ venc->output = 0;
+ venc->std = V4L2_STD_525_60;
+
+ ret = venc_s_routing(sd, 0, venc->output, 0);
+ if (ret < 0) {
+ v4l2_err(sd, "Error setting output during init\n");
+ return -EINVAL;
+ }
+
+ ret = venc_s_std_output(sd, venc->std);
+ if (ret < 0) {
+ v4l2_err(sd, "Error setting std during init\n");
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int venc_device_get(struct device *dev, void *data)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct venc_state **venc = data;
+
+ if (strcmp(MODULE_NAME, pdev->name) == 0)
+ *venc = platform_get_drvdata(pdev);
+
+ return 0;
+}
+
+struct v4l2_subdev *venc_sub_dev_init(struct v4l2_device *v4l2_dev,
+ const char *venc_name)
+{
+ struct venc_state *venc;
+ int err;
+
+ err = bus_for_each_dev(&platform_bus_type, NULL, &venc,
+ venc_device_get);
+ if (venc == NULL)
+ return NULL;
+
+ v4l2_subdev_init(&venc->sd, &venc_ops);
+
+ strcpy(venc->sd.name, venc_name);
+ if (v4l2_device_register_subdev(v4l2_dev, &venc->sd) < 0) {
+ v4l2_err(v4l2_dev,
+ "vpbe unable to register venc sub device\n");
+ return NULL;
+ }
+ if (venc_initialize(&venc->sd)) {
+ v4l2_err(v4l2_dev,
+ "vpbe venc initialization failed\n");
+ return NULL;
+ }
+
+ return &venc->sd;
+}
+EXPORT_SYMBOL(venc_sub_dev_init);
+
+static int venc_probe(struct platform_device *pdev)
+{
+ struct venc_state *venc;
+ struct resource *res;
+ int ret;
+
+ venc = kzalloc(sizeof(struct venc_state), GFP_KERNEL);
+ if (venc == NULL)
+ return -ENOMEM;
+
+ venc->pdev = &pdev->dev;
+ venc->pdata = pdev->dev.platform_data;
+ if (NULL == venc->pdata) {
+ dev_err(venc->pdev, "Unable to get platform data for"
+ " VENC sub device");
+ ret = -ENOENT;
+ goto free_mem;
+ }
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(venc->pdev,
+ "Unable to get VENC register address map\n");
+ ret = -ENODEV;
+ goto free_mem;
+ }
+
+ if (!request_mem_region(res->start, resource_size(res), "venc")) {
+ dev_err(venc->pdev, "Unable to reserve VENC MMIO region\n");
+ ret = -ENODEV;
+ goto free_mem;
+ }
+
+ venc->venc_base = ioremap_nocache(res->start, resource_size(res));
+ if (!venc->venc_base) {
+ dev_err(venc->pdev, "Unable to map VENC IO space\n");
+ ret = -ENODEV;
+ goto release_venc_mem_region;
+ }
+
+ if (venc->pdata->venc_type != VPBE_VERSION_1) {
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!res) {
+ dev_err(venc->pdev,
+ "Unable to get VDAC_CONFIG address map\n");
+ ret = -ENODEV;
+ goto unmap_venc_io;
+ }
+
+ if (!request_mem_region(res->start,
+ resource_size(res), "venc")) {
+ dev_err(venc->pdev,
+ "Unable to reserve VDAC_CONFIG MMIO region\n");
+ ret = -ENODEV;
+ goto unmap_venc_io;
+ }
+
+ venc->vdaccfg_reg = ioremap_nocache(res->start,
+ resource_size(res));
+ if (!venc->vdaccfg_reg) {
+ dev_err(venc->pdev,
+ "Unable to map VDAC_CONFIG IO space\n");
+ ret = -ENODEV;
+ goto release_vdaccfg_mem_region;
+ }
+ }
+ spin_lock_init(&venc->lock);
+ platform_set_drvdata(pdev, venc);
+ dev_notice(venc->pdev, "VENC sub device probe success\n");
+ return 0;
+
+release_vdaccfg_mem_region:
+ release_mem_region(res->start, resource_size(res));
+unmap_venc_io:
+ iounmap(venc->venc_base);
+release_venc_mem_region:
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ release_mem_region(res->start, resource_size(res));
+free_mem:
+ kfree(venc);
+ return ret;
+}
+
+static int venc_remove(struct platform_device *pdev)
+{
+ struct venc_state *venc = platform_get_drvdata(pdev);
+ struct resource *res;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ iounmap((void *)venc->venc_base);
+ release_mem_region(res->start, resource_size(res));
+ if (venc->pdata->venc_type != VPBE_VERSION_1) {
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ iounmap((void *)venc->vdaccfg_reg);
+ release_mem_region(res->start, resource_size(res));
+ }
+ kfree(venc);
+
+ return 0;
+}
+
+static struct platform_driver venc_driver = {
+ .probe = venc_probe,
+ .remove = venc_remove,
+ .driver = {
+ .name = MODULE_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+module_platform_driver(venc_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("VPBE VENC Driver");
+MODULE_AUTHOR("Texas Instruments");
--- /dev/null
- #include <plat/mipi_csis.h>
+/*
+ * Samsung S5P/EXYNOS4 SoC series MIPI-CSI receiver driver
+ *
+ * Copyright (C) 2011 - 2012 Samsung Electronics Co., Ltd.
+ * Sylwester Nawrocki <s.nawrocki@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/memory.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-subdev.h>
++#include <linux/platform_data/mipi-csis.h>
+#include "mipi-csis.h"
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Debug level (0-2)");
+
+/* Register map definition */
+
+/* CSIS global control */
+#define S5PCSIS_CTRL 0x00
+#define S5PCSIS_CTRL_DPDN_DEFAULT (0 << 31)
+#define S5PCSIS_CTRL_DPDN_SWAP (1 << 31)
+#define S5PCSIS_CTRL_ALIGN_32BIT (1 << 20)
+#define S5PCSIS_CTRL_UPDATE_SHADOW (1 << 16)
+#define S5PCSIS_CTRL_WCLK_EXTCLK (1 << 8)
+#define S5PCSIS_CTRL_RESET (1 << 4)
+#define S5PCSIS_CTRL_ENABLE (1 << 0)
+
+/* D-PHY control */
+#define S5PCSIS_DPHYCTRL 0x04
+#define S5PCSIS_DPHYCTRL_HSS_MASK (0x1f << 27)
+#define S5PCSIS_DPHYCTRL_ENABLE (0x1f << 0)
+
+#define S5PCSIS_CONFIG 0x08
+#define S5PCSIS_CFG_FMT_YCBCR422_8BIT (0x1e << 2)
+#define S5PCSIS_CFG_FMT_RAW8 (0x2a << 2)
+#define S5PCSIS_CFG_FMT_RAW10 (0x2b << 2)
+#define S5PCSIS_CFG_FMT_RAW12 (0x2c << 2)
+/* User defined formats, x = 1...4 */
+#define S5PCSIS_CFG_FMT_USER(x) ((0x30 + x - 1) << 2)
+#define S5PCSIS_CFG_FMT_MASK (0x3f << 2)
+#define S5PCSIS_CFG_NR_LANE_MASK 3
+
+/* Interrupt mask */
+#define S5PCSIS_INTMSK 0x10
+#define S5PCSIS_INTMSK_EN_ALL 0xf000103f
+#define S5PCSIS_INTMSK_EVEN_BEFORE (1 << 31)
+#define S5PCSIS_INTMSK_EVEN_AFTER (1 << 30)
+#define S5PCSIS_INTMSK_ODD_BEFORE (1 << 29)
+#define S5PCSIS_INTMSK_ODD_AFTER (1 << 28)
+#define S5PCSIS_INTMSK_ERR_SOT_HS (1 << 12)
+#define S5PCSIS_INTMSK_ERR_LOST_FS (1 << 5)
+#define S5PCSIS_INTMSK_ERR_LOST_FE (1 << 4)
+#define S5PCSIS_INTMSK_ERR_OVER (1 << 3)
+#define S5PCSIS_INTMSK_ERR_ECC (1 << 2)
+#define S5PCSIS_INTMSK_ERR_CRC (1 << 1)
+#define S5PCSIS_INTMSK_ERR_UNKNOWN (1 << 0)
+
+/* Interrupt source */
+#define S5PCSIS_INTSRC 0x14
+#define S5PCSIS_INTSRC_EVEN_BEFORE (1 << 31)
+#define S5PCSIS_INTSRC_EVEN_AFTER (1 << 30)
+#define S5PCSIS_INTSRC_EVEN (0x3 << 30)
+#define S5PCSIS_INTSRC_ODD_BEFORE (1 << 29)
+#define S5PCSIS_INTSRC_ODD_AFTER (1 << 28)
+#define S5PCSIS_INTSRC_ODD (0x3 << 28)
+#define S5PCSIS_INTSRC_NON_IMAGE_DATA (0xff << 28)
+#define S5PCSIS_INTSRC_ERR_SOT_HS (0xf << 12)
+#define S5PCSIS_INTSRC_ERR_LOST_FS (1 << 5)
+#define S5PCSIS_INTSRC_ERR_LOST_FE (1 << 4)
+#define S5PCSIS_INTSRC_ERR_OVER (1 << 3)
+#define S5PCSIS_INTSRC_ERR_ECC (1 << 2)
+#define S5PCSIS_INTSRC_ERR_CRC (1 << 1)
+#define S5PCSIS_INTSRC_ERR_UNKNOWN (1 << 0)
+#define S5PCSIS_INTSRC_ERRORS 0xf03f
+
+/* Pixel resolution */
+#define S5PCSIS_RESOL 0x2c
+#define CSIS_MAX_PIX_WIDTH 0xffff
+#define CSIS_MAX_PIX_HEIGHT 0xffff
+
+/* Non-image packet data buffers */
+#define S5PCSIS_PKTDATA_ODD 0x2000
+#define S5PCSIS_PKTDATA_EVEN 0x3000
+#define S5PCSIS_PKTDATA_SIZE SZ_4K
+
+enum {
+ CSIS_CLK_MUX,
+ CSIS_CLK_GATE,
+};
+
+static char *csi_clock_name[] = {
+ [CSIS_CLK_MUX] = "sclk_csis",
+ [CSIS_CLK_GATE] = "csis",
+};
+#define NUM_CSIS_CLOCKS ARRAY_SIZE(csi_clock_name)
+
+static const char * const csis_supply_name[] = {
+ "vddcore", /* CSIS Core (1.0V, 1.1V or 1.2V) suppply */
+ "vddio", /* CSIS I/O and PLL (1.8V) supply */
+};
+#define CSIS_NUM_SUPPLIES ARRAY_SIZE(csis_supply_name)
+
+enum {
+ ST_POWERED = 1,
+ ST_STREAMING = 2,
+ ST_SUSPENDED = 4,
+};
+
+struct s5pcsis_event {
+ u32 mask;
+ const char * const name;
+ unsigned int counter;
+};
+
+static const struct s5pcsis_event s5pcsis_events[] = {
+ /* Errors */
+ { S5PCSIS_INTSRC_ERR_SOT_HS, "SOT Error" },
+ { S5PCSIS_INTSRC_ERR_LOST_FS, "Lost Frame Start Error" },
+ { S5PCSIS_INTSRC_ERR_LOST_FE, "Lost Frame End Error" },
+ { S5PCSIS_INTSRC_ERR_OVER, "FIFO Overflow Error" },
+ { S5PCSIS_INTSRC_ERR_ECC, "ECC Error" },
+ { S5PCSIS_INTSRC_ERR_CRC, "CRC Error" },
+ { S5PCSIS_INTSRC_ERR_UNKNOWN, "Unknown Error" },
+ /* Non-image data receive events */
+ { S5PCSIS_INTSRC_EVEN_BEFORE, "Non-image data before even frame" },
+ { S5PCSIS_INTSRC_EVEN_AFTER, "Non-image data after even frame" },
+ { S5PCSIS_INTSRC_ODD_BEFORE, "Non-image data before odd frame" },
+ { S5PCSIS_INTSRC_ODD_AFTER, "Non-image data after odd frame" },
+};
+#define S5PCSIS_NUM_EVENTS ARRAY_SIZE(s5pcsis_events)
+
+struct csis_pktbuf {
+ u32 *data;
+ unsigned int len;
+};
+
+/**
+ * struct csis_state - the driver's internal state data structure
+ * @lock: mutex serializing the subdev and power management operations,
+ * protecting @format and @flags members
+ * @pads: CSIS pads array
+ * @sd: v4l2_subdev associated with CSIS device instance
+ * @pdev: CSIS platform device
+ * @regs: mmaped I/O registers memory
+ * @supplies: CSIS regulator supplies
+ * @clock: CSIS clocks
+ * @irq: requested s5p-mipi-csis irq number
+ * @flags: the state variable for power and streaming control
+ * @csis_fmt: current CSIS pixel format
+ * @format: common media bus format for the source and sink pad
+ * @slock: spinlock protecting structure members below
+ * @pkt_buf: the frame embedded (non-image) data buffer
+ * @events: MIPI-CSIS event (error) counters
+ */
+struct csis_state {
+ struct mutex lock;
+ struct media_pad pads[CSIS_PADS_NUM];
+ struct v4l2_subdev sd;
+ struct platform_device *pdev;
+ void __iomem *regs;
+ struct regulator_bulk_data supplies[CSIS_NUM_SUPPLIES];
+ struct clk *clock[NUM_CSIS_CLOCKS];
+ int irq;
+ u32 flags;
+ const struct csis_pix_format *csis_fmt;
+ struct v4l2_mbus_framefmt format;
+
+ struct spinlock slock;
+ struct csis_pktbuf pkt_buf;
+ struct s5pcsis_event events[S5PCSIS_NUM_EVENTS];
+};
+
+/**
+ * struct csis_pix_format - CSIS pixel format description
+ * @pix_width_alignment: horizontal pixel alignment, width will be
+ * multiple of 2^pix_width_alignment
+ * @code: corresponding media bus code
+ * @fmt_reg: S5PCSIS_CONFIG register value
+ * @data_alignment: MIPI-CSI data alignment in bits
+ */
+struct csis_pix_format {
+ unsigned int pix_width_alignment;
+ enum v4l2_mbus_pixelcode code;
+ u32 fmt_reg;
+ u8 data_alignment;
+};
+
+static const struct csis_pix_format s5pcsis_formats[] = {
+ {
+ .code = V4L2_MBUS_FMT_VYUY8_2X8,
+ .fmt_reg = S5PCSIS_CFG_FMT_YCBCR422_8BIT,
+ .data_alignment = 32,
+ }, {
+ .code = V4L2_MBUS_FMT_JPEG_1X8,
+ .fmt_reg = S5PCSIS_CFG_FMT_USER(1),
+ .data_alignment = 32,
+ }, {
+ .code = V4L2_MBUS_FMT_S5C_UYVY_JPEG_1X8,
+ .fmt_reg = S5PCSIS_CFG_FMT_USER(1),
+ .data_alignment = 32,
+ }
+};
+
+#define s5pcsis_write(__csis, __r, __v) writel(__v, __csis->regs + __r)
+#define s5pcsis_read(__csis, __r) readl(__csis->regs + __r)
+
+static struct csis_state *sd_to_csis_state(struct v4l2_subdev *sdev)
+{
+ return container_of(sdev, struct csis_state, sd);
+}
+
+static const struct csis_pix_format *find_csis_format(
+ struct v4l2_mbus_framefmt *mf)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(s5pcsis_formats); i++)
+ if (mf->code == s5pcsis_formats[i].code)
+ return &s5pcsis_formats[i];
+ return NULL;
+}
+
+static void s5pcsis_enable_interrupts(struct csis_state *state, bool on)
+{
+ u32 val = s5pcsis_read(state, S5PCSIS_INTMSK);
+
+ val = on ? val | S5PCSIS_INTMSK_EN_ALL :
+ val & ~S5PCSIS_INTMSK_EN_ALL;
+ s5pcsis_write(state, S5PCSIS_INTMSK, val);
+}
+
+static void s5pcsis_reset(struct csis_state *state)
+{
+ u32 val = s5pcsis_read(state, S5PCSIS_CTRL);
+
+ s5pcsis_write(state, S5PCSIS_CTRL, val | S5PCSIS_CTRL_RESET);
+ udelay(10);
+}
+
+static void s5pcsis_system_enable(struct csis_state *state, int on)
+{
+ u32 val;
+
+ val = s5pcsis_read(state, S5PCSIS_CTRL);
+ if (on)
+ val |= S5PCSIS_CTRL_ENABLE;
+ else
+ val &= ~S5PCSIS_CTRL_ENABLE;
+ s5pcsis_write(state, S5PCSIS_CTRL, val);
+
+ val = s5pcsis_read(state, S5PCSIS_DPHYCTRL);
+ if (on)
+ val |= S5PCSIS_DPHYCTRL_ENABLE;
+ else
+ val &= ~S5PCSIS_DPHYCTRL_ENABLE;
+ s5pcsis_write(state, S5PCSIS_DPHYCTRL, val);
+}
+
+/* Called with the state.lock mutex held */
+static void __s5pcsis_set_format(struct csis_state *state)
+{
+ struct v4l2_mbus_framefmt *mf = &state->format;
+ u32 val;
+
+ v4l2_dbg(1, debug, &state->sd, "fmt: %#x, %d x %d\n",
+ mf->code, mf->width, mf->height);
+
+ /* Color format */
+ val = s5pcsis_read(state, S5PCSIS_CONFIG);
+ val = (val & ~S5PCSIS_CFG_FMT_MASK) | state->csis_fmt->fmt_reg;
+ s5pcsis_write(state, S5PCSIS_CONFIG, val);
+
+ /* Pixel resolution */
+ val = (mf->width << 16) | mf->height;
+ s5pcsis_write(state, S5PCSIS_RESOL, val);
+}
+
+static void s5pcsis_set_hsync_settle(struct csis_state *state, int settle)
+{
+ u32 val = s5pcsis_read(state, S5PCSIS_DPHYCTRL);
+
+ val = (val & ~S5PCSIS_DPHYCTRL_HSS_MASK) | (settle << 27);
+ s5pcsis_write(state, S5PCSIS_DPHYCTRL, val);
+}
+
+static void s5pcsis_set_params(struct csis_state *state)
+{
+ struct s5p_platform_mipi_csis *pdata = state->pdev->dev.platform_data;
+ u32 val;
+
+ val = s5pcsis_read(state, S5PCSIS_CONFIG);
+ val = (val & ~S5PCSIS_CFG_NR_LANE_MASK) | (pdata->lanes - 1);
+ s5pcsis_write(state, S5PCSIS_CONFIG, val);
+
+ __s5pcsis_set_format(state);
+ s5pcsis_set_hsync_settle(state, pdata->hs_settle);
+
+ val = s5pcsis_read(state, S5PCSIS_CTRL);
+ if (state->csis_fmt->data_alignment == 32)
+ val |= S5PCSIS_CTRL_ALIGN_32BIT;
+ else /* 24-bits */
+ val &= ~S5PCSIS_CTRL_ALIGN_32BIT;
+ /* Not using external clock. */
+ val &= ~S5PCSIS_CTRL_WCLK_EXTCLK;
+ s5pcsis_write(state, S5PCSIS_CTRL, val);
+
+ /* Update the shadow register. */
+ val = s5pcsis_read(state, S5PCSIS_CTRL);
+ s5pcsis_write(state, S5PCSIS_CTRL, val | S5PCSIS_CTRL_UPDATE_SHADOW);
+}
+
+static void s5pcsis_clk_put(struct csis_state *state)
+{
+ int i;
+
+ for (i = 0; i < NUM_CSIS_CLOCKS; i++) {
+ if (IS_ERR_OR_NULL(state->clock[i]))
+ continue;
+ clk_unprepare(state->clock[i]);
+ clk_put(state->clock[i]);
+ state->clock[i] = NULL;
+ }
+}
+
+static int s5pcsis_clk_get(struct csis_state *state)
+{
+ struct device *dev = &state->pdev->dev;
+ int i, ret;
+
+ for (i = 0; i < NUM_CSIS_CLOCKS; i++) {
+ state->clock[i] = clk_get(dev, csi_clock_name[i]);
+ if (IS_ERR(state->clock[i]))
+ goto err;
+ ret = clk_prepare(state->clock[i]);
+ if (ret < 0) {
+ clk_put(state->clock[i]);
+ state->clock[i] = NULL;
+ goto err;
+ }
+ }
+ return 0;
+err:
+ s5pcsis_clk_put(state);
+ dev_err(dev, "failed to get clock: %s\n", csi_clock_name[i]);
+ return -ENXIO;
+}
+
+static void s5pcsis_start_stream(struct csis_state *state)
+{
+ s5pcsis_reset(state);
+ s5pcsis_set_params(state);
+ s5pcsis_system_enable(state, true);
+ s5pcsis_enable_interrupts(state, true);
+}
+
+static void s5pcsis_stop_stream(struct csis_state *state)
+{
+ s5pcsis_enable_interrupts(state, false);
+ s5pcsis_system_enable(state, false);
+}
+
+static void s5pcsis_clear_counters(struct csis_state *state)
+{
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&state->slock, flags);
+ for (i = 0; i < S5PCSIS_NUM_EVENTS; i++)
+ state->events[i].counter = 0;
+ spin_unlock_irqrestore(&state->slock, flags);
+}
+
+static void s5pcsis_log_counters(struct csis_state *state, bool non_errors)
+{
+ int i = non_errors ? S5PCSIS_NUM_EVENTS : S5PCSIS_NUM_EVENTS - 4;
+ unsigned long flags;
+
+ spin_lock_irqsave(&state->slock, flags);
+
+ for (i--; i >= 0; i--)
+ if (state->events[i].counter >= 0)
+ v4l2_info(&state->sd, "%s events: %d\n",
+ state->events[i].name,
+ state->events[i].counter);
+
+ spin_unlock_irqrestore(&state->slock, flags);
+}
+
+/*
+ * V4L2 subdev operations
+ */
+static int s5pcsis_s_power(struct v4l2_subdev *sd, int on)
+{
+ struct csis_state *state = sd_to_csis_state(sd);
+ struct device *dev = &state->pdev->dev;
+
+ if (on)
+ return pm_runtime_get_sync(dev);
+
+ return pm_runtime_put_sync(dev);
+}
+
+static int s5pcsis_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct csis_state *state = sd_to_csis_state(sd);
+ int ret = 0;
+
+ v4l2_dbg(1, debug, sd, "%s: %d, state: 0x%x\n",
+ __func__, enable, state->flags);
+
+ if (enable) {
+ s5pcsis_clear_counters(state);
+ ret = pm_runtime_get_sync(&state->pdev->dev);
+ if (ret && ret != 1)
+ return ret;
+ }
+
+ mutex_lock(&state->lock);
+ if (enable) {
+ if (state->flags & ST_SUSPENDED) {
+ ret = -EBUSY;
+ goto unlock;
+ }
+ s5pcsis_start_stream(state);
+ state->flags |= ST_STREAMING;
+ } else {
+ s5pcsis_stop_stream(state);
+ state->flags &= ~ST_STREAMING;
+ if (debug > 0)
+ s5pcsis_log_counters(state, true);
+ }
+unlock:
+ mutex_unlock(&state->lock);
+ if (!enable)
+ pm_runtime_put(&state->pdev->dev);
+
+ return ret == 1 ? 0 : ret;
+}
+
+static int s5pcsis_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ if (code->index >= ARRAY_SIZE(s5pcsis_formats))
+ return -EINVAL;
+
+ code->code = s5pcsis_formats[code->index].code;
+ return 0;
+}
+
+static struct csis_pix_format const *s5pcsis_try_format(
+ struct v4l2_mbus_framefmt *mf)
+{
+ struct csis_pix_format const *csis_fmt;
+
+ csis_fmt = find_csis_format(mf);
+ if (csis_fmt == NULL)
+ csis_fmt = &s5pcsis_formats[0];
+
+ mf->code = csis_fmt->code;
+ v4l_bound_align_image(&mf->width, 1, CSIS_MAX_PIX_WIDTH,
+ csis_fmt->pix_width_alignment,
+ &mf->height, 1, CSIS_MAX_PIX_HEIGHT, 1,
+ 0);
+ return csis_fmt;
+}
+
+static struct v4l2_mbus_framefmt *__s5pcsis_get_format(
+ struct csis_state *state, struct v4l2_subdev_fh *fh,
+ u32 pad, enum v4l2_subdev_format_whence which)
+{
+ if (which == V4L2_SUBDEV_FORMAT_TRY)
+ return fh ? v4l2_subdev_get_try_format(fh, pad) : NULL;
+
+ return &state->format;
+}
+
+static int s5pcsis_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *fmt)
+{
+ struct csis_state *state = sd_to_csis_state(sd);
+ struct csis_pix_format const *csis_fmt;
+ struct v4l2_mbus_framefmt *mf;
+
+ if (fmt->pad != CSIS_PAD_SOURCE && fmt->pad != CSIS_PAD_SINK)
+ return -EINVAL;
+
+ mf = __s5pcsis_get_format(state, fh, fmt->pad, fmt->which);
+
+ if (fmt->pad == CSIS_PAD_SOURCE) {
+ if (mf) {
+ mutex_lock(&state->lock);
+ fmt->format = *mf;
+ mutex_unlock(&state->lock);
+ }
+ return 0;
+ }
+ csis_fmt = s5pcsis_try_format(&fmt->format);
+ if (mf) {
+ mutex_lock(&state->lock);
+ *mf = fmt->format;
+ if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE)
+ state->csis_fmt = csis_fmt;
+ mutex_unlock(&state->lock);
+ }
+ return 0;
+}
+
+static int s5pcsis_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *fmt)
+{
+ struct csis_state *state = sd_to_csis_state(sd);
+ struct v4l2_mbus_framefmt *mf;
+
+ if (fmt->pad != CSIS_PAD_SOURCE && fmt->pad != CSIS_PAD_SINK)
+ return -EINVAL;
+
+ mf = __s5pcsis_get_format(state, fh, fmt->pad, fmt->which);
+ if (!mf)
+ return -EINVAL;
+
+ mutex_lock(&state->lock);
+ fmt->format = *mf;
+ mutex_unlock(&state->lock);
+ return 0;
+}
+
+static int s5pcsis_s_rx_buffer(struct v4l2_subdev *sd, void *buf,
+ unsigned int *size)
+{
+ struct csis_state *state = sd_to_csis_state(sd);
+ unsigned long flags;
+
+ *size = min_t(unsigned int, *size, S5PCSIS_PKTDATA_SIZE);
+
+ spin_lock_irqsave(&state->slock, flags);
+ state->pkt_buf.data = buf;
+ state->pkt_buf.len = *size;
+ spin_unlock_irqrestore(&state->slock, flags);
+
+ return 0;
+}
+
+static int s5pcsis_log_status(struct v4l2_subdev *sd)
+{
+ struct csis_state *state = sd_to_csis_state(sd);
+
+ s5pcsis_log_counters(state, true);
+ return 0;
+}
+
+static int s5pcsis_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ struct v4l2_mbus_framefmt *format = v4l2_subdev_get_try_format(fh, 0);
+
+ format->colorspace = V4L2_COLORSPACE_JPEG;
+ format->code = s5pcsis_formats[0].code;
+ format->width = S5PCSIS_DEF_PIX_WIDTH;
+ format->height = S5PCSIS_DEF_PIX_HEIGHT;
+ format->field = V4L2_FIELD_NONE;
+
+ return 0;
+}
+
+static const struct v4l2_subdev_internal_ops s5pcsis_sd_internal_ops = {
+ .open = s5pcsis_open,
+};
+
+static struct v4l2_subdev_core_ops s5pcsis_core_ops = {
+ .s_power = s5pcsis_s_power,
+ .log_status = s5pcsis_log_status,
+};
+
+static struct v4l2_subdev_pad_ops s5pcsis_pad_ops = {
+ .enum_mbus_code = s5pcsis_enum_mbus_code,
+ .get_fmt = s5pcsis_get_fmt,
+ .set_fmt = s5pcsis_set_fmt,
+};
+
+static struct v4l2_subdev_video_ops s5pcsis_video_ops = {
+ .s_rx_buffer = s5pcsis_s_rx_buffer,
+ .s_stream = s5pcsis_s_stream,
+};
+
+static struct v4l2_subdev_ops s5pcsis_subdev_ops = {
+ .core = &s5pcsis_core_ops,
+ .pad = &s5pcsis_pad_ops,
+ .video = &s5pcsis_video_ops,
+};
+
+static irqreturn_t s5pcsis_irq_handler(int irq, void *dev_id)
+{
+ struct csis_state *state = dev_id;
+ struct csis_pktbuf *pktbuf = &state->pkt_buf;
+ unsigned long flags;
+ u32 status;
+
+ status = s5pcsis_read(state, S5PCSIS_INTSRC);
+ spin_lock_irqsave(&state->slock, flags);
+
+ if ((status & S5PCSIS_INTSRC_NON_IMAGE_DATA) && pktbuf->data) {
+ u32 offset;
+
+ if (status & S5PCSIS_INTSRC_EVEN)
+ offset = S5PCSIS_PKTDATA_EVEN;
+ else
+ offset = S5PCSIS_PKTDATA_ODD;
+
+ memcpy(pktbuf->data, state->regs + offset, pktbuf->len);
+ pktbuf->data = NULL;
+ rmb();
+ }
+
+ /* Update the event/error counters */
+ if ((status & S5PCSIS_INTSRC_ERRORS) || debug) {
+ int i;
+ for (i = 0; i < S5PCSIS_NUM_EVENTS; i++) {
+ if (!(status & state->events[i].mask))
+ continue;
+ state->events[i].counter++;
+ v4l2_dbg(2, debug, &state->sd, "%s: %d\n",
+ state->events[i].name,
+ state->events[i].counter);
+ }
+ v4l2_dbg(2, debug, &state->sd, "status: %08x\n", status);
+ }
+ spin_unlock_irqrestore(&state->slock, flags);
+
+ s5pcsis_write(state, S5PCSIS_INTSRC, status);
+ return IRQ_HANDLED;
+}
+
+static int __devinit s5pcsis_probe(struct platform_device *pdev)
+{
+ struct s5p_platform_mipi_csis *pdata;
+ struct resource *mem_res;
+ struct csis_state *state;
+ int ret = -ENOMEM;
+ int i;
+
+ state = devm_kzalloc(&pdev->dev, sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return -ENOMEM;
+
+ mutex_init(&state->lock);
+ spin_lock_init(&state->slock);
+
+ state->pdev = pdev;
+
+ pdata = pdev->dev.platform_data;
+ if (pdata == NULL || pdata->phy_enable == NULL) {
+ dev_err(&pdev->dev, "Platform data not fully specified\n");
+ return -EINVAL;
+ }
+
+ if ((pdev->id == 1 && pdata->lanes > CSIS1_MAX_LANES) ||
+ pdata->lanes > CSIS0_MAX_LANES) {
+ dev_err(&pdev->dev, "Unsupported number of data lanes: %d\n",
+ pdata->lanes);
+ return -EINVAL;
+ }
+
+ mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ state->regs = devm_request_and_ioremap(&pdev->dev, mem_res);
+ if (state->regs == NULL) {
+ dev_err(&pdev->dev, "Failed to request and remap io memory\n");
+ return -ENXIO;
+ }
+
+ state->irq = platform_get_irq(pdev, 0);
+ if (state->irq < 0) {
+ dev_err(&pdev->dev, "Failed to get irq\n");
+ return state->irq;
+ }
+
+ for (i = 0; i < CSIS_NUM_SUPPLIES; i++)
+ state->supplies[i].supply = csis_supply_name[i];
+
+ ret = regulator_bulk_get(&pdev->dev, CSIS_NUM_SUPPLIES,
+ state->supplies);
+ if (ret)
+ return ret;
+
+ ret = s5pcsis_clk_get(state);
+ if (ret)
+ goto e_clkput;
+
+ clk_enable(state->clock[CSIS_CLK_MUX]);
+ if (pdata->clk_rate)
+ clk_set_rate(state->clock[CSIS_CLK_MUX], pdata->clk_rate);
+ else
+ dev_WARN(&pdev->dev, "No clock frequency specified!\n");
+
+ ret = devm_request_irq(&pdev->dev, state->irq, s5pcsis_irq_handler,
+ 0, dev_name(&pdev->dev), state);
+ if (ret) {
+ dev_err(&pdev->dev, "Interrupt request failed\n");
+ goto e_regput;
+ }
+
+ v4l2_subdev_init(&state->sd, &s5pcsis_subdev_ops);
+ state->sd.owner = THIS_MODULE;
+ strlcpy(state->sd.name, dev_name(&pdev->dev), sizeof(state->sd.name));
+ state->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ state->csis_fmt = &s5pcsis_formats[0];
+
+ state->format.code = s5pcsis_formats[0].code;
+ state->format.width = S5PCSIS_DEF_PIX_WIDTH;
+ state->format.height = S5PCSIS_DEF_PIX_HEIGHT;
+
+ state->pads[CSIS_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+ state->pads[CSIS_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
+ ret = media_entity_init(&state->sd.entity,
+ CSIS_PADS_NUM, state->pads, 0);
+ if (ret < 0)
+ goto e_clkput;
+
+ /* This allows to retrieve the platform device id by the host driver */
+ v4l2_set_subdevdata(&state->sd, pdev);
+
+ /* .. and a pointer to the subdev. */
+ platform_set_drvdata(pdev, &state->sd);
+
+ memcpy(state->events, s5pcsis_events, sizeof(state->events));
+
+ pm_runtime_enable(&pdev->dev);
+ return 0;
+
+e_regput:
+ regulator_bulk_free(CSIS_NUM_SUPPLIES, state->supplies);
+e_clkput:
+ clk_disable(state->clock[CSIS_CLK_MUX]);
+ s5pcsis_clk_put(state);
+ return ret;
+}
+
+static int s5pcsis_pm_suspend(struct device *dev, bool runtime)
+{
+ struct s5p_platform_mipi_csis *pdata = dev->platform_data;
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct csis_state *state = sd_to_csis_state(sd);
+ int ret = 0;
+
+ v4l2_dbg(1, debug, sd, "%s: flags: 0x%x\n",
+ __func__, state->flags);
+
+ mutex_lock(&state->lock);
+ if (state->flags & ST_POWERED) {
+ s5pcsis_stop_stream(state);
+ ret = pdata->phy_enable(state->pdev, false);
+ if (ret)
+ goto unlock;
+ ret = regulator_bulk_disable(CSIS_NUM_SUPPLIES,
+ state->supplies);
+ if (ret)
+ goto unlock;
+ clk_disable(state->clock[CSIS_CLK_GATE]);
+ state->flags &= ~ST_POWERED;
+ if (!runtime)
+ state->flags |= ST_SUSPENDED;
+ }
+ unlock:
+ mutex_unlock(&state->lock);
+ return ret ? -EAGAIN : 0;
+}
+
+static int s5pcsis_pm_resume(struct device *dev, bool runtime)
+{
+ struct s5p_platform_mipi_csis *pdata = dev->platform_data;
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct csis_state *state = sd_to_csis_state(sd);
+ int ret = 0;
+
+ v4l2_dbg(1, debug, sd, "%s: flags: 0x%x\n",
+ __func__, state->flags);
+
+ mutex_lock(&state->lock);
+ if (!runtime && !(state->flags & ST_SUSPENDED))
+ goto unlock;
+
+ if (!(state->flags & ST_POWERED)) {
+ ret = regulator_bulk_enable(CSIS_NUM_SUPPLIES,
+ state->supplies);
+ if (ret)
+ goto unlock;
+ ret = pdata->phy_enable(state->pdev, true);
+ if (!ret) {
+ state->flags |= ST_POWERED;
+ } else {
+ regulator_bulk_disable(CSIS_NUM_SUPPLIES,
+ state->supplies);
+ goto unlock;
+ }
+ clk_enable(state->clock[CSIS_CLK_GATE]);
+ }
+ if (state->flags & ST_STREAMING)
+ s5pcsis_start_stream(state);
+
+ state->flags &= ~ST_SUSPENDED;
+ unlock:
+ mutex_unlock(&state->lock);
+ return ret ? -EAGAIN : 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int s5pcsis_suspend(struct device *dev)
+{
+ return s5pcsis_pm_suspend(dev, false);
+}
+
+static int s5pcsis_resume(struct device *dev)
+{
+ return s5pcsis_pm_resume(dev, false);
+}
+#endif
+
+#ifdef CONFIG_PM_RUNTIME
+static int s5pcsis_runtime_suspend(struct device *dev)
+{
+ return s5pcsis_pm_suspend(dev, true);
+}
+
+static int s5pcsis_runtime_resume(struct device *dev)
+{
+ return s5pcsis_pm_resume(dev, true);
+}
+#endif
+
+static int __devexit s5pcsis_remove(struct platform_device *pdev)
+{
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct csis_state *state = sd_to_csis_state(sd);
+
+ pm_runtime_disable(&pdev->dev);
+ s5pcsis_pm_suspend(&pdev->dev, false);
+ clk_disable(state->clock[CSIS_CLK_MUX]);
+ pm_runtime_set_suspended(&pdev->dev);
+ s5pcsis_clk_put(state);
+ regulator_bulk_free(CSIS_NUM_SUPPLIES, state->supplies);
+
+ media_entity_cleanup(&state->sd.entity);
+
+ return 0;
+}
+
+static const struct dev_pm_ops s5pcsis_pm_ops = {
+ SET_RUNTIME_PM_OPS(s5pcsis_runtime_suspend, s5pcsis_runtime_resume,
+ NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(s5pcsis_suspend, s5pcsis_resume)
+};
+
+static struct platform_driver s5pcsis_driver = {
+ .probe = s5pcsis_probe,
+ .remove = __devexit_p(s5pcsis_remove),
+ .driver = {
+ .name = CSIS_DRIVER_NAME,
+ .owner = THIS_MODULE,
+ .pm = &s5pcsis_pm_ops,
+ },
+};
+
+module_platform_driver(s5pcsis_driver);
+
+MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
+MODULE_DESCRIPTION("Samsung S5P/EXYNOS SoC MIPI-CSI2 receiver driver");
+MODULE_LICENSE("GPL");
--- /dev/null
- #include <mach/mx1_camera.h>
+/*
+ * V4L2 Driver for i.MXL/i.MXL camera (CSI) host
+ *
+ * Copyright (C) 2008, Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
+ * Copyright (C) 2009, Darius Augulis <augulis.darius@gmail.com>
+ *
+ * Based on PXA SoC camera driver
+ * Copyright (C) 2006, Sascha Hauer, Pengutronix
+ * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/videodev2.h>
+
+#include <media/soc_camera.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-dev.h>
+#include <media/videobuf-dma-contig.h>
+#include <media/soc_mediabus.h>
+
+#include <asm/dma.h>
+#include <asm/fiq.h>
+#include <mach/dma-mx1-mx2.h>
+#include <mach/hardware.h>
+#include <mach/irqs.h>
++#include <linux/platform_data/camera-mx1.h>
+
+/*
+ * CSI registers
+ */
+#define CSICR1 0x00 /* CSI Control Register 1 */
+#define CSISR 0x08 /* CSI Status Register */
+#define CSIRXR 0x10 /* CSI RxFIFO Register */
+
+#define CSICR1_RXFF_LEVEL(x) (((x) & 0x3) << 19)
+#define CSICR1_SOF_POL (1 << 17)
+#define CSICR1_SOF_INTEN (1 << 16)
+#define CSICR1_MCLKDIV(x) (((x) & 0xf) << 12)
+#define CSICR1_MCLKEN (1 << 9)
+#define CSICR1_FCC (1 << 8)
+#define CSICR1_BIG_ENDIAN (1 << 7)
+#define CSICR1_CLR_RXFIFO (1 << 5)
+#define CSICR1_GCLK_MODE (1 << 4)
+#define CSICR1_DATA_POL (1 << 2)
+#define CSICR1_REDGE (1 << 1)
+#define CSICR1_EN (1 << 0)
+
+#define CSISR_SFF_OR_INT (1 << 25)
+#define CSISR_RFF_OR_INT (1 << 24)
+#define CSISR_STATFF_INT (1 << 21)
+#define CSISR_RXFF_INT (1 << 18)
+#define CSISR_SOF_INT (1 << 16)
+#define CSISR_DRDY (1 << 0)
+
+#define DRIVER_VERSION "0.0.2"
+#define DRIVER_NAME "mx1-camera"
+
+#define CSI_IRQ_MASK (CSISR_SFF_OR_INT | CSISR_RFF_OR_INT | \
+ CSISR_STATFF_INT | CSISR_RXFF_INT | CSISR_SOF_INT)
+
+#define CSI_BUS_FLAGS (V4L2_MBUS_MASTER | V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
+ V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW | \
+ V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING | \
+ V4L2_MBUS_DATA_ACTIVE_HIGH | V4L2_MBUS_DATA_ACTIVE_LOW)
+
+#define MAX_VIDEO_MEM 16 /* Video memory limit in megabytes */
+
+/*
+ * Structures
+ */
+
+/* buffer for one video frame */
+struct mx1_buffer {
+ /* common v4l buffer stuff -- must be first */
+ struct videobuf_buffer vb;
+ enum v4l2_mbus_pixelcode code;
+ int inwork;
+};
+
+/*
+ * i.MX1/i.MXL is only supposed to handle one camera on its Camera Sensor
+ * Interface. If anyone ever builds hardware to enable more than
+ * one camera, they will have to modify this driver too
+ */
+struct mx1_camera_dev {
+ struct soc_camera_host soc_host;
+ struct soc_camera_device *icd;
+ struct mx1_camera_pdata *pdata;
+ struct mx1_buffer *active;
+ struct resource *res;
+ struct clk *clk;
+ struct list_head capture;
+
+ void __iomem *base;
+ int dma_chan;
+ unsigned int irq;
+ unsigned long mclk;
+
+ spinlock_t lock;
+};
+
+/*
+ * Videobuf operations
+ */
+static int mx1_videobuf_setup(struct videobuf_queue *vq, unsigned int *count,
+ unsigned int *size)
+{
+ struct soc_camera_device *icd = vq->priv_data;
+
+ *size = icd->sizeimage;
+
+ if (!*count)
+ *count = 32;
+
+ if (*size * *count > MAX_VIDEO_MEM * 1024 * 1024)
+ *count = (MAX_VIDEO_MEM * 1024 * 1024) / *size;
+
+ dev_dbg(icd->parent, "count=%d, size=%d\n", *count, *size);
+
+ return 0;
+}
+
+static void free_buffer(struct videobuf_queue *vq, struct mx1_buffer *buf)
+{
+ struct soc_camera_device *icd = vq->priv_data;
+ struct videobuf_buffer *vb = &buf->vb;
+
+ BUG_ON(in_interrupt());
+
+ dev_dbg(icd->parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
+ vb, vb->baddr, vb->bsize);
+
+ /*
+ * This waits until this buffer is out of danger, i.e., until it is no
+ * longer in STATE_QUEUED or STATE_ACTIVE
+ */
+ videobuf_waiton(vq, vb, 0, 0);
+ videobuf_dma_contig_free(vq, vb);
+
+ vb->state = VIDEOBUF_NEEDS_INIT;
+}
+
+static int mx1_videobuf_prepare(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb, enum v4l2_field field)
+{
+ struct soc_camera_device *icd = vq->priv_data;
+ struct mx1_buffer *buf = container_of(vb, struct mx1_buffer, vb);
+ int ret;
+
+ dev_dbg(icd->parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
+ vb, vb->baddr, vb->bsize);
+
+ /* Added list head initialization on alloc */
+ WARN_ON(!list_empty(&vb->queue));
+
+ BUG_ON(NULL == icd->current_fmt);
+
+ /*
+ * I think, in buf_prepare you only have to protect global data,
+ * the actual buffer is yours
+ */
+ buf->inwork = 1;
+
+ if (buf->code != icd->current_fmt->code ||
+ vb->width != icd->user_width ||
+ vb->height != icd->user_height ||
+ vb->field != field) {
+ buf->code = icd->current_fmt->code;
+ vb->width = icd->user_width;
+ vb->height = icd->user_height;
+ vb->field = field;
+ vb->state = VIDEOBUF_NEEDS_INIT;
+ }
+
+ vb->size = icd->sizeimage;
+ if (0 != vb->baddr && vb->bsize < vb->size) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (vb->state == VIDEOBUF_NEEDS_INIT) {
+ ret = videobuf_iolock(vq, vb, NULL);
+ if (ret)
+ goto fail;
+
+ vb->state = VIDEOBUF_PREPARED;
+ }
+
+ buf->inwork = 0;
+
+ return 0;
+
+fail:
+ free_buffer(vq, buf);
+out:
+ buf->inwork = 0;
+ return ret;
+}
+
+static int mx1_camera_setup_dma(struct mx1_camera_dev *pcdev)
+{
+ struct videobuf_buffer *vbuf = &pcdev->active->vb;
+ struct device *dev = pcdev->icd->parent;
+ int ret;
+
+ if (unlikely(!pcdev->active)) {
+ dev_err(dev, "DMA End IRQ with no active buffer\n");
+ return -EFAULT;
+ }
+
+ /* setup sg list for future DMA */
+ ret = imx_dma_setup_single(pcdev->dma_chan,
+ videobuf_to_dma_contig(vbuf),
+ vbuf->size, pcdev->res->start +
+ CSIRXR, DMA_MODE_READ);
+ if (unlikely(ret))
+ dev_err(dev, "Failed to setup DMA sg list\n");
+
+ return ret;
+}
+
+/* Called under spinlock_irqsave(&pcdev->lock, ...) */
+static void mx1_videobuf_queue(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb)
+{
+ struct soc_camera_device *icd = vq->priv_data;
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx1_camera_dev *pcdev = ici->priv;
+ struct mx1_buffer *buf = container_of(vb, struct mx1_buffer, vb);
+
+ dev_dbg(icd->parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
+ vb, vb->baddr, vb->bsize);
+
+ list_add_tail(&vb->queue, &pcdev->capture);
+
+ vb->state = VIDEOBUF_ACTIVE;
+
+ if (!pcdev->active) {
+ pcdev->active = buf;
+
+ /* setup sg list for future DMA */
+ if (!mx1_camera_setup_dma(pcdev)) {
+ unsigned int temp;
+ /* enable SOF irq */
+ temp = __raw_readl(pcdev->base + CSICR1) |
+ CSICR1_SOF_INTEN;
+ __raw_writel(temp, pcdev->base + CSICR1);
+ }
+ }
+}
+
+static void mx1_videobuf_release(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb)
+{
+ struct mx1_buffer *buf = container_of(vb, struct mx1_buffer, vb);
+#ifdef DEBUG
+ struct soc_camera_device *icd = vq->priv_data;
+ struct device *dev = icd->parent;
+
+ dev_dbg(dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
+ vb, vb->baddr, vb->bsize);
+
+ switch (vb->state) {
+ case VIDEOBUF_ACTIVE:
+ dev_dbg(dev, "%s (active)\n", __func__);
+ break;
+ case VIDEOBUF_QUEUED:
+ dev_dbg(dev, "%s (queued)\n", __func__);
+ break;
+ case VIDEOBUF_PREPARED:
+ dev_dbg(dev, "%s (prepared)\n", __func__);
+ break;
+ default:
+ dev_dbg(dev, "%s (unknown)\n", __func__);
+ break;
+ }
+#endif
+
+ free_buffer(vq, buf);
+}
+
+static void mx1_camera_wakeup(struct mx1_camera_dev *pcdev,
+ struct videobuf_buffer *vb,
+ struct mx1_buffer *buf)
+{
+ /* _init is used to debug races, see comment in mx1_camera_reqbufs() */
+ list_del_init(&vb->queue);
+ vb->state = VIDEOBUF_DONE;
+ do_gettimeofday(&vb->ts);
+ vb->field_count++;
+ wake_up(&vb->done);
+
+ if (list_empty(&pcdev->capture)) {
+ pcdev->active = NULL;
+ return;
+ }
+
+ pcdev->active = list_entry(pcdev->capture.next,
+ struct mx1_buffer, vb.queue);
+
+ /* setup sg list for future DMA */
+ if (likely(!mx1_camera_setup_dma(pcdev))) {
+ unsigned int temp;
+
+ /* enable SOF irq */
+ temp = __raw_readl(pcdev->base + CSICR1) | CSICR1_SOF_INTEN;
+ __raw_writel(temp, pcdev->base + CSICR1);
+ }
+}
+
+static void mx1_camera_dma_irq(int channel, void *data)
+{
+ struct mx1_camera_dev *pcdev = data;
+ struct device *dev = pcdev->icd->parent;
+ struct mx1_buffer *buf;
+ struct videobuf_buffer *vb;
+ unsigned long flags;
+
+ spin_lock_irqsave(&pcdev->lock, flags);
+
+ imx_dma_disable(channel);
+
+ if (unlikely(!pcdev->active)) {
+ dev_err(dev, "DMA End IRQ with no active buffer\n");
+ goto out;
+ }
+
+ vb = &pcdev->active->vb;
+ buf = container_of(vb, struct mx1_buffer, vb);
+ WARN_ON(buf->inwork || list_empty(&vb->queue));
+ dev_dbg(dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
+ vb, vb->baddr, vb->bsize);
+
+ mx1_camera_wakeup(pcdev, vb, buf);
+out:
+ spin_unlock_irqrestore(&pcdev->lock, flags);
+}
+
+static struct videobuf_queue_ops mx1_videobuf_ops = {
+ .buf_setup = mx1_videobuf_setup,
+ .buf_prepare = mx1_videobuf_prepare,
+ .buf_queue = mx1_videobuf_queue,
+ .buf_release = mx1_videobuf_release,
+};
+
+static void mx1_camera_init_videobuf(struct videobuf_queue *q,
+ struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx1_camera_dev *pcdev = ici->priv;
+
+ videobuf_queue_dma_contig_init(q, &mx1_videobuf_ops, icd->parent,
+ &pcdev->lock, V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ V4L2_FIELD_NONE,
+ sizeof(struct mx1_buffer), icd, &icd->video_lock);
+}
+
+static int mclk_get_divisor(struct mx1_camera_dev *pcdev)
+{
+ unsigned int mclk = pcdev->mclk;
+ unsigned long div;
+ unsigned long lcdclk;
+
+ lcdclk = clk_get_rate(pcdev->clk);
+
+ /*
+ * We verify platform_mclk_10khz != 0, so if anyone breaks it, here
+ * they get a nice Oops
+ */
+ div = (lcdclk + 2 * mclk - 1) / (2 * mclk) - 1;
+
+ dev_dbg(pcdev->icd->parent,
+ "System clock %lukHz, target freq %dkHz, divisor %lu\n",
+ lcdclk / 1000, mclk / 1000, div);
+
+ return div;
+}
+
+static void mx1_camera_activate(struct mx1_camera_dev *pcdev)
+{
+ unsigned int csicr1 = CSICR1_EN;
+
+ dev_dbg(pcdev->icd->parent, "Activate device\n");
+
+ clk_prepare_enable(pcdev->clk);
+
+ /* enable CSI before doing anything else */
+ __raw_writel(csicr1, pcdev->base + CSICR1);
+
+ csicr1 |= CSICR1_MCLKEN | CSICR1_FCC | CSICR1_GCLK_MODE;
+ csicr1 |= CSICR1_MCLKDIV(mclk_get_divisor(pcdev));
+ csicr1 |= CSICR1_RXFF_LEVEL(2); /* 16 words */
+
+ __raw_writel(csicr1, pcdev->base + CSICR1);
+}
+
+static void mx1_camera_deactivate(struct mx1_camera_dev *pcdev)
+{
+ dev_dbg(pcdev->icd->parent, "Deactivate device\n");
+
+ /* Disable all CSI interface */
+ __raw_writel(0x00, pcdev->base + CSICR1);
+
+ clk_disable_unprepare(pcdev->clk);
+}
+
+/*
+ * The following two functions absolutely depend on the fact, that
+ * there can be only one camera on i.MX1/i.MXL camera sensor interface
+ */
+static int mx1_camera_add_device(struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx1_camera_dev *pcdev = ici->priv;
+
+ if (pcdev->icd)
+ return -EBUSY;
+
+ dev_info(icd->parent, "MX1 Camera driver attached to camera %d\n",
+ icd->devnum);
+
+ mx1_camera_activate(pcdev);
+
+ pcdev->icd = icd;
+
+ return 0;
+}
+
+static void mx1_camera_remove_device(struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx1_camera_dev *pcdev = ici->priv;
+ unsigned int csicr1;
+
+ BUG_ON(icd != pcdev->icd);
+
+ /* disable interrupts */
+ csicr1 = __raw_readl(pcdev->base + CSICR1) & ~CSI_IRQ_MASK;
+ __raw_writel(csicr1, pcdev->base + CSICR1);
+
+ /* Stop DMA engine */
+ imx_dma_disable(pcdev->dma_chan);
+
+ dev_info(icd->parent, "MX1 Camera driver detached from camera %d\n",
+ icd->devnum);
+
+ mx1_camera_deactivate(pcdev);
+
+ pcdev->icd = NULL;
+}
+
+static int mx1_camera_set_crop(struct soc_camera_device *icd,
+ struct v4l2_crop *a)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+
+ return v4l2_subdev_call(sd, video, s_crop, a);
+}
+
+static int mx1_camera_set_bus_param(struct soc_camera_device *icd)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx1_camera_dev *pcdev = ici->priv;
+ struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
+ unsigned long common_flags;
+ unsigned int csicr1;
+ int ret;
+
+ /* MX1 supports only 8bit buswidth */
+ ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
+ if (!ret) {
+ common_flags = soc_mbus_config_compatible(&cfg, CSI_BUS_FLAGS);
+ if (!common_flags) {
+ dev_warn(icd->parent,
+ "Flags incompatible: camera 0x%x, host 0x%x\n",
+ cfg.flags, CSI_BUS_FLAGS);
+ return -EINVAL;
+ }
+ } else if (ret != -ENOIOCTLCMD) {
+ return ret;
+ } else {
+ common_flags = CSI_BUS_FLAGS;
+ }
+
+ /* Make choises, based on platform choice */
+ if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
+ (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
+ if (!pcdev->pdata ||
+ pcdev->pdata->flags & MX1_CAMERA_VSYNC_HIGH)
+ common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
+ else
+ common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
+ }
+
+ if ((common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) &&
+ (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)) {
+ if (!pcdev->pdata ||
+ pcdev->pdata->flags & MX1_CAMERA_PCLK_RISING)
+ common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_FALLING;
+ else
+ common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_RISING;
+ }
+
+ if ((common_flags & V4L2_MBUS_DATA_ACTIVE_HIGH) &&
+ (common_flags & V4L2_MBUS_DATA_ACTIVE_LOW)) {
+ if (!pcdev->pdata ||
+ pcdev->pdata->flags & MX1_CAMERA_DATA_HIGH)
+ common_flags &= ~V4L2_MBUS_DATA_ACTIVE_LOW;
+ else
+ common_flags &= ~V4L2_MBUS_DATA_ACTIVE_HIGH;
+ }
+
+ cfg.flags = common_flags;
+ ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
+ if (ret < 0 && ret != -ENOIOCTLCMD) {
+ dev_dbg(icd->parent, "camera s_mbus_config(0x%lx) returned %d\n",
+ common_flags, ret);
+ return ret;
+ }
+
+ csicr1 = __raw_readl(pcdev->base + CSICR1);
+
+ if (common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
+ csicr1 |= CSICR1_REDGE;
+ if (common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
+ csicr1 |= CSICR1_SOF_POL;
+ if (common_flags & V4L2_MBUS_DATA_ACTIVE_LOW)
+ csicr1 |= CSICR1_DATA_POL;
+
+ __raw_writel(csicr1, pcdev->base + CSICR1);
+
+ return 0;
+}
+
+static int mx1_camera_set_fmt(struct soc_camera_device *icd,
+ struct v4l2_format *f)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ const struct soc_camera_format_xlate *xlate;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct v4l2_mbus_framefmt mf;
+ int ret, buswidth;
+
+ xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
+ if (!xlate) {
+ dev_warn(icd->parent, "Format %x not found\n",
+ pix->pixelformat);
+ return -EINVAL;
+ }
+
+ buswidth = xlate->host_fmt->bits_per_sample;
+ if (buswidth > 8) {
+ dev_warn(icd->parent,
+ "bits-per-sample %d for format %x unsupported\n",
+ buswidth, pix->pixelformat);
+ return -EINVAL;
+ }
+
+ mf.width = pix->width;
+ mf.height = pix->height;
+ mf.field = pix->field;
+ mf.colorspace = pix->colorspace;
+ mf.code = xlate->code;
+
+ ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf);
+ if (ret < 0)
+ return ret;
+
+ if (mf.code != xlate->code)
+ return -EINVAL;
+
+ pix->width = mf.width;
+ pix->height = mf.height;
+ pix->field = mf.field;
+ pix->colorspace = mf.colorspace;
+ icd->current_fmt = xlate;
+
+ return ret;
+}
+
+static int mx1_camera_try_fmt(struct soc_camera_device *icd,
+ struct v4l2_format *f)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ const struct soc_camera_format_xlate *xlate;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct v4l2_mbus_framefmt mf;
+ int ret;
+ /* TODO: limit to mx1 hardware capabilities */
+
+ xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
+ if (!xlate) {
+ dev_warn(icd->parent, "Format %x not found\n",
+ pix->pixelformat);
+ return -EINVAL;
+ }
+
+ mf.width = pix->width;
+ mf.height = pix->height;
+ mf.field = pix->field;
+ mf.colorspace = pix->colorspace;
+ mf.code = xlate->code;
+
+ /* limit to sensor capabilities */
+ ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf);
+ if (ret < 0)
+ return ret;
+
+ pix->width = mf.width;
+ pix->height = mf.height;
+ pix->field = mf.field;
+ pix->colorspace = mf.colorspace;
+
+ return 0;
+}
+
+static int mx1_camera_reqbufs(struct soc_camera_device *icd,
+ struct v4l2_requestbuffers *p)
+{
+ int i;
+
+ /*
+ * This is for locking debugging only. I removed spinlocks and now I
+ * check whether .prepare is ever called on a linked buffer, or whether
+ * a dma IRQ can occur for an in-work or unlinked buffer. Until now
+ * it hadn't triggered
+ */
+ for (i = 0; i < p->count; i++) {
+ struct mx1_buffer *buf = container_of(icd->vb_vidq.bufs[i],
+ struct mx1_buffer, vb);
+ buf->inwork = 0;
+ INIT_LIST_HEAD(&buf->vb.queue);
+ }
+
+ return 0;
+}
+
+static unsigned int mx1_camera_poll(struct file *file, poll_table *pt)
+{
+ struct soc_camera_device *icd = file->private_data;
+ struct mx1_buffer *buf;
+
+ buf = list_entry(icd->vb_vidq.stream.next, struct mx1_buffer,
+ vb.stream);
+
+ poll_wait(file, &buf->vb.done, pt);
+
+ if (buf->vb.state == VIDEOBUF_DONE ||
+ buf->vb.state == VIDEOBUF_ERROR)
+ return POLLIN | POLLRDNORM;
+
+ return 0;
+}
+
+static int mx1_camera_querycap(struct soc_camera_host *ici,
+ struct v4l2_capability *cap)
+{
+ /* cap->name is set by the friendly caller:-> */
+ strlcpy(cap->card, "i.MX1/i.MXL Camera", sizeof(cap->card));
+ cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
+
+ return 0;
+}
+
+static struct soc_camera_host_ops mx1_soc_camera_host_ops = {
+ .owner = THIS_MODULE,
+ .add = mx1_camera_add_device,
+ .remove = mx1_camera_remove_device,
+ .set_bus_param = mx1_camera_set_bus_param,
+ .set_crop = mx1_camera_set_crop,
+ .set_fmt = mx1_camera_set_fmt,
+ .try_fmt = mx1_camera_try_fmt,
+ .init_videobuf = mx1_camera_init_videobuf,
+ .reqbufs = mx1_camera_reqbufs,
+ .poll = mx1_camera_poll,
+ .querycap = mx1_camera_querycap,
+};
+
+static struct fiq_handler fh = {
+ .name = "csi_sof"
+};
+
+static int __init mx1_camera_probe(struct platform_device *pdev)
+{
+ struct mx1_camera_dev *pcdev;
+ struct resource *res;
+ struct pt_regs regs;
+ struct clk *clk;
+ void __iomem *base;
+ unsigned int irq;
+ int err = 0;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ irq = platform_get_irq(pdev, 0);
+ if (!res || (int)irq <= 0) {
+ err = -ENODEV;
+ goto exit;
+ }
+
+ clk = clk_get(&pdev->dev, "csi_clk");
+ if (IS_ERR(clk)) {
+ err = PTR_ERR(clk);
+ goto exit;
+ }
+
+ pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
+ if (!pcdev) {
+ dev_err(&pdev->dev, "Could not allocate pcdev\n");
+ err = -ENOMEM;
+ goto exit_put_clk;
+ }
+
+ pcdev->res = res;
+ pcdev->clk = clk;
+
+ pcdev->pdata = pdev->dev.platform_data;
+
+ if (pcdev->pdata)
+ pcdev->mclk = pcdev->pdata->mclk_10khz * 10000;
+
+ if (!pcdev->mclk) {
+ dev_warn(&pdev->dev,
+ "mclk_10khz == 0! Please, fix your platform data. "
+ "Using default 20MHz\n");
+ pcdev->mclk = 20000000;
+ }
+
+ INIT_LIST_HEAD(&pcdev->capture);
+ spin_lock_init(&pcdev->lock);
+
+ /*
+ * Request the regions.
+ */
+ if (!request_mem_region(res->start, resource_size(res), DRIVER_NAME)) {
+ err = -EBUSY;
+ goto exit_kfree;
+ }
+
+ base = ioremap(res->start, resource_size(res));
+ if (!base) {
+ err = -ENOMEM;
+ goto exit_release;
+ }
+ pcdev->irq = irq;
+ pcdev->base = base;
+
+ /* request dma */
+ pcdev->dma_chan = imx_dma_request_by_prio(DRIVER_NAME, DMA_PRIO_HIGH);
+ if (pcdev->dma_chan < 0) {
+ dev_err(&pdev->dev, "Can't request DMA for MX1 CSI\n");
+ err = -EBUSY;
+ goto exit_iounmap;
+ }
+ dev_dbg(&pdev->dev, "got DMA channel %d\n", pcdev->dma_chan);
+
+ imx_dma_setup_handlers(pcdev->dma_chan, mx1_camera_dma_irq, NULL,
+ pcdev);
+
+ imx_dma_config_channel(pcdev->dma_chan, IMX_DMA_TYPE_FIFO,
+ IMX_DMA_MEMSIZE_32, MX1_DMA_REQ_CSI_R, 0);
+ /* burst length : 16 words = 64 bytes */
+ imx_dma_config_burstlen(pcdev->dma_chan, 0);
+
+ /* request irq */
+ err = claim_fiq(&fh);
+ if (err) {
+ dev_err(&pdev->dev, "Camera interrupt register failed \n");
+ goto exit_free_dma;
+ }
+
+ set_fiq_handler(&mx1_camera_sof_fiq_start, &mx1_camera_sof_fiq_end -
+ &mx1_camera_sof_fiq_start);
+
+ regs.ARM_r8 = (long)MX1_DMA_DIMR;
+ regs.ARM_r9 = (long)MX1_DMA_CCR(pcdev->dma_chan);
+ regs.ARM_r10 = (long)pcdev->base + CSICR1;
+ regs.ARM_fp = (long)pcdev->base + CSISR;
+ regs.ARM_sp = 1 << pcdev->dma_chan;
+ set_fiq_regs(®s);
+
+ mxc_set_irq_fiq(irq, 1);
+ enable_fiq(irq);
+
+ pcdev->soc_host.drv_name = DRIVER_NAME;
+ pcdev->soc_host.ops = &mx1_soc_camera_host_ops;
+ pcdev->soc_host.priv = pcdev;
+ pcdev->soc_host.v4l2_dev.dev = &pdev->dev;
+ pcdev->soc_host.nr = pdev->id;
+ err = soc_camera_host_register(&pcdev->soc_host);
+ if (err)
+ goto exit_free_irq;
+
+ dev_info(&pdev->dev, "MX1 Camera driver loaded\n");
+
+ return 0;
+
+exit_free_irq:
+ disable_fiq(irq);
+ mxc_set_irq_fiq(irq, 0);
+ release_fiq(&fh);
+exit_free_dma:
+ imx_dma_free(pcdev->dma_chan);
+exit_iounmap:
+ iounmap(base);
+exit_release:
+ release_mem_region(res->start, resource_size(res));
+exit_kfree:
+ kfree(pcdev);
+exit_put_clk:
+ clk_put(clk);
+exit:
+ return err;
+}
+
+static int __exit mx1_camera_remove(struct platform_device *pdev)
+{
+ struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
+ struct mx1_camera_dev *pcdev = container_of(soc_host,
+ struct mx1_camera_dev, soc_host);
+ struct resource *res;
+
+ imx_dma_free(pcdev->dma_chan);
+ disable_fiq(pcdev->irq);
+ mxc_set_irq_fiq(pcdev->irq, 0);
+ release_fiq(&fh);
+
+ clk_put(pcdev->clk);
+
+ soc_camera_host_unregister(soc_host);
+
+ iounmap(pcdev->base);
+
+ res = pcdev->res;
+ release_mem_region(res->start, resource_size(res));
+
+ kfree(pcdev);
+
+ dev_info(&pdev->dev, "MX1 Camera driver unloaded\n");
+
+ return 0;
+}
+
+static struct platform_driver mx1_camera_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+ .remove = __exit_p(mx1_camera_remove),
+};
+
+static int __init mx1_camera_init(void)
+{
+ return platform_driver_probe(&mx1_camera_driver, mx1_camera_probe);
+}
+
+static void __exit mx1_camera_exit(void)
+{
+ return platform_driver_unregister(&mx1_camera_driver);
+}
+
+module_init(mx1_camera_init);
+module_exit(mx1_camera_exit);
+
+MODULE_DESCRIPTION("i.MX1/i.MXL SoC Camera Host driver");
+MODULE_AUTHOR("Paulius Zaleckas <paulius.zaleckas@teltonika.lt>");
+MODULE_LICENSE("GPL v2");
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_ALIAS("platform:" DRIVER_NAME);
--- /dev/null
- #include <mach/mx2_cam.h>
+/*
+ * V4L2 Driver for i.MX27/i.MX25 camera host
+ *
+ * Copyright (C) 2008, Sascha Hauer, Pengutronix
+ * Copyright (C) 2010, Baruch Siach, Orex Computed Radiography
+ * Copyright (C) 2012, Javier Martin, Vista Silicon S.L.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/gcd.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/math64.h>
+#include <linux/mm.h>
+#include <linux/moduleparam.h>
+#include <linux/time.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/mutex.h>
+#include <linux/clk.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-dev.h>
+#include <media/videobuf2-core.h>
+#include <media/videobuf2-dma-contig.h>
+#include <media/soc_camera.h>
+#include <media/soc_mediabus.h>
+
+#include <linux/videodev2.h>
+
++#include <linux/platform_data/camera-mx2.h>
+#include <mach/hardware.h>
+
+#include <asm/dma.h>
+
+#define MX2_CAM_DRV_NAME "mx2-camera"
+#define MX2_CAM_VERSION "0.0.6"
+#define MX2_CAM_DRIVER_DESCRIPTION "i.MX2x_Camera"
+
+/* reset values */
+#define CSICR1_RESET_VAL 0x40000800
+#define CSICR2_RESET_VAL 0x0
+#define CSICR3_RESET_VAL 0x0
+
+/* csi control reg 1 */
+#define CSICR1_SWAP16_EN (1 << 31)
+#define CSICR1_EXT_VSYNC (1 << 30)
+#define CSICR1_EOF_INTEN (1 << 29)
+#define CSICR1_PRP_IF_EN (1 << 28)
+#define CSICR1_CCIR_MODE (1 << 27)
+#define CSICR1_COF_INTEN (1 << 26)
+#define CSICR1_SF_OR_INTEN (1 << 25)
+#define CSICR1_RF_OR_INTEN (1 << 24)
+#define CSICR1_STATFF_LEVEL (3 << 22)
+#define CSICR1_STATFF_INTEN (1 << 21)
+#define CSICR1_RXFF_LEVEL(l) (((l) & 3) << 19) /* MX27 */
+#define CSICR1_FB2_DMA_INTEN (1 << 20) /* MX25 */
+#define CSICR1_FB1_DMA_INTEN (1 << 19) /* MX25 */
+#define CSICR1_RXFF_INTEN (1 << 18)
+#define CSICR1_SOF_POL (1 << 17)
+#define CSICR1_SOF_INTEN (1 << 16)
+#define CSICR1_MCLKDIV(d) (((d) & 0xF) << 12)
+#define CSICR1_HSYNC_POL (1 << 11)
+#define CSICR1_CCIR_EN (1 << 10)
+#define CSICR1_MCLKEN (1 << 9)
+#define CSICR1_FCC (1 << 8)
+#define CSICR1_PACK_DIR (1 << 7)
+#define CSICR1_CLR_STATFIFO (1 << 6)
+#define CSICR1_CLR_RXFIFO (1 << 5)
+#define CSICR1_GCLK_MODE (1 << 4)
+#define CSICR1_INV_DATA (1 << 3)
+#define CSICR1_INV_PCLK (1 << 2)
+#define CSICR1_REDGE (1 << 1)
+#define CSICR1_FMT_MASK (CSICR1_PACK_DIR | CSICR1_SWAP16_EN)
+
+#define SHIFT_STATFF_LEVEL 22
+#define SHIFT_RXFF_LEVEL 19
+#define SHIFT_MCLKDIV 12
+
+/* control reg 3 */
+#define CSICR3_FRMCNT (0xFFFF << 16)
+#define CSICR3_FRMCNT_RST (1 << 15)
+#define CSICR3_DMA_REFLASH_RFF (1 << 14)
+#define CSICR3_DMA_REFLASH_SFF (1 << 13)
+#define CSICR3_DMA_REQ_EN_RFF (1 << 12)
+#define CSICR3_DMA_REQ_EN_SFF (1 << 11)
+#define CSICR3_RXFF_LEVEL(l) (((l) & 7) << 4) /* MX25 */
+#define CSICR3_CSI_SUP (1 << 3)
+#define CSICR3_ZERO_PACK_EN (1 << 2)
+#define CSICR3_ECC_INT_EN (1 << 1)
+#define CSICR3_ECC_AUTO_EN (1 << 0)
+
+#define SHIFT_FRMCNT 16
+
+/* csi status reg */
+#define CSISR_SFF_OR_INT (1 << 25)
+#define CSISR_RFF_OR_INT (1 << 24)
+#define CSISR_STATFF_INT (1 << 21)
+#define CSISR_DMA_TSF_FB2_INT (1 << 20) /* MX25 */
+#define CSISR_DMA_TSF_FB1_INT (1 << 19) /* MX25 */
+#define CSISR_RXFF_INT (1 << 18)
+#define CSISR_EOF_INT (1 << 17)
+#define CSISR_SOF_INT (1 << 16)
+#define CSISR_F2_INT (1 << 15)
+#define CSISR_F1_INT (1 << 14)
+#define CSISR_COF_INT (1 << 13)
+#define CSISR_ECC_INT (1 << 1)
+#define CSISR_DRDY (1 << 0)
+
+#define CSICR1 0x00
+#define CSICR2 0x04
+#define CSISR (cpu_is_mx27() ? 0x08 : 0x18)
+#define CSISTATFIFO 0x0c
+#define CSIRFIFO 0x10
+#define CSIRXCNT 0x14
+#define CSICR3 (cpu_is_mx27() ? 0x1C : 0x08)
+#define CSIDMASA_STATFIFO 0x20
+#define CSIDMATA_STATFIFO 0x24
+#define CSIDMASA_FB1 0x28
+#define CSIDMASA_FB2 0x2c
+#define CSIFBUF_PARA 0x30
+#define CSIIMAG_PARA 0x34
+
+/* EMMA PrP */
+#define PRP_CNTL 0x00
+#define PRP_INTR_CNTL 0x04
+#define PRP_INTRSTATUS 0x08
+#define PRP_SOURCE_Y_PTR 0x0c
+#define PRP_SOURCE_CB_PTR 0x10
+#define PRP_SOURCE_CR_PTR 0x14
+#define PRP_DEST_RGB1_PTR 0x18
+#define PRP_DEST_RGB2_PTR 0x1c
+#define PRP_DEST_Y_PTR 0x20
+#define PRP_DEST_CB_PTR 0x24
+#define PRP_DEST_CR_PTR 0x28
+#define PRP_SRC_FRAME_SIZE 0x2c
+#define PRP_DEST_CH1_LINE_STRIDE 0x30
+#define PRP_SRC_PIXEL_FORMAT_CNTL 0x34
+#define PRP_CH1_PIXEL_FORMAT_CNTL 0x38
+#define PRP_CH1_OUT_IMAGE_SIZE 0x3c
+#define PRP_CH2_OUT_IMAGE_SIZE 0x40
+#define PRP_SRC_LINE_STRIDE 0x44
+#define PRP_CSC_COEF_012 0x48
+#define PRP_CSC_COEF_345 0x4c
+#define PRP_CSC_COEF_678 0x50
+#define PRP_CH1_RZ_HORI_COEF1 0x54
+#define PRP_CH1_RZ_HORI_COEF2 0x58
+#define PRP_CH1_RZ_HORI_VALID 0x5c
+#define PRP_CH1_RZ_VERT_COEF1 0x60
+#define PRP_CH1_RZ_VERT_COEF2 0x64
+#define PRP_CH1_RZ_VERT_VALID 0x68
+#define PRP_CH2_RZ_HORI_COEF1 0x6c
+#define PRP_CH2_RZ_HORI_COEF2 0x70
+#define PRP_CH2_RZ_HORI_VALID 0x74
+#define PRP_CH2_RZ_VERT_COEF1 0x78
+#define PRP_CH2_RZ_VERT_COEF2 0x7c
+#define PRP_CH2_RZ_VERT_VALID 0x80
+
+#define PRP_CNTL_CH1EN (1 << 0)
+#define PRP_CNTL_CH2EN (1 << 1)
+#define PRP_CNTL_CSIEN (1 << 2)
+#define PRP_CNTL_DATA_IN_YUV420 (0 << 3)
+#define PRP_CNTL_DATA_IN_YUV422 (1 << 3)
+#define PRP_CNTL_DATA_IN_RGB16 (2 << 3)
+#define PRP_CNTL_DATA_IN_RGB32 (3 << 3)
+#define PRP_CNTL_CH1_OUT_RGB8 (0 << 5)
+#define PRP_CNTL_CH1_OUT_RGB16 (1 << 5)
+#define PRP_CNTL_CH1_OUT_RGB32 (2 << 5)
+#define PRP_CNTL_CH1_OUT_YUV422 (3 << 5)
+#define PRP_CNTL_CH2_OUT_YUV420 (0 << 7)
+#define PRP_CNTL_CH2_OUT_YUV422 (1 << 7)
+#define PRP_CNTL_CH2_OUT_YUV444 (2 << 7)
+#define PRP_CNTL_CH1_LEN (1 << 9)
+#define PRP_CNTL_CH2_LEN (1 << 10)
+#define PRP_CNTL_SKIP_FRAME (1 << 11)
+#define PRP_CNTL_SWRST (1 << 12)
+#define PRP_CNTL_CLKEN (1 << 13)
+#define PRP_CNTL_WEN (1 << 14)
+#define PRP_CNTL_CH1BYP (1 << 15)
+#define PRP_CNTL_IN_TSKIP(x) ((x) << 16)
+#define PRP_CNTL_CH1_TSKIP(x) ((x) << 19)
+#define PRP_CNTL_CH2_TSKIP(x) ((x) << 22)
+#define PRP_CNTL_INPUT_FIFO_LEVEL(x) ((x) << 25)
+#define PRP_CNTL_RZ_FIFO_LEVEL(x) ((x) << 27)
+#define PRP_CNTL_CH2B1EN (1 << 29)
+#define PRP_CNTL_CH2B2EN (1 << 30)
+#define PRP_CNTL_CH2FEN (1 << 31)
+
+/* IRQ Enable and status register */
+#define PRP_INTR_RDERR (1 << 0)
+#define PRP_INTR_CH1WERR (1 << 1)
+#define PRP_INTR_CH2WERR (1 << 2)
+#define PRP_INTR_CH1FC (1 << 3)
+#define PRP_INTR_CH2FC (1 << 5)
+#define PRP_INTR_LBOVF (1 << 7)
+#define PRP_INTR_CH2OVF (1 << 8)
+
+/* Resizing registers */
+#define PRP_RZ_VALID_TBL_LEN(x) ((x) << 24)
+#define PRP_RZ_VALID_BILINEAR (1 << 31)
+
+#define MAX_VIDEO_MEM 16
+
+#define RESIZE_NUM_MIN 1
+#define RESIZE_NUM_MAX 20
+#define BC_COEF 3
+#define SZ_COEF (1 << BC_COEF)
+
+#define RESIZE_DIR_H 0
+#define RESIZE_DIR_V 1
+
+#define RESIZE_ALGO_BILINEAR 0
+#define RESIZE_ALGO_AVERAGING 1
+
+struct mx2_prp_cfg {
+ int channel;
+ u32 in_fmt;
+ u32 out_fmt;
+ u32 src_pixel;
+ u32 ch1_pixel;
+ u32 irq_flags;
+ u32 csicr1;
+};
+
+/* prp resizing parameters */
+struct emma_prp_resize {
+ int algo; /* type of algorithm used */
+ int len; /* number of coefficients */
+ unsigned char s[RESIZE_NUM_MAX]; /* table of coefficients */
+};
+
+/* prp configuration for a client-host fmt pair */
+struct mx2_fmt_cfg {
+ enum v4l2_mbus_pixelcode in_fmt;
+ u32 out_fmt;
+ struct mx2_prp_cfg cfg;
+};
+
+enum mx2_buffer_state {
+ MX2_STATE_QUEUED,
+ MX2_STATE_ACTIVE,
+ MX2_STATE_DONE,
+};
+
+struct mx2_buf_internal {
+ struct list_head queue;
+ int bufnum;
+ bool discard;
+};
+
+/* buffer for one video frame */
+struct mx2_buffer {
+ /* common v4l buffer stuff -- must be first */
+ struct vb2_buffer vb;
+ enum mx2_buffer_state state;
+ struct mx2_buf_internal internal;
+};
+
+struct mx2_camera_dev {
+ struct device *dev;
+ struct soc_camera_host soc_host;
+ struct soc_camera_device *icd;
+ struct clk *clk_csi, *clk_emma_ahb, *clk_emma_ipg;
+
+ void __iomem *base_csi, *base_emma;
+
+ struct mx2_camera_platform_data *pdata;
+ unsigned long platform_flags;
+
+ struct list_head capture;
+ struct list_head active_bufs;
+ struct list_head discard;
+
+ spinlock_t lock;
+
+ int dma;
+ struct mx2_buffer *active;
+ struct mx2_buffer *fb1_active;
+ struct mx2_buffer *fb2_active;
+
+ u32 csicr1;
+
+ struct mx2_buf_internal buf_discard[2];
+ void *discard_buffer;
+ dma_addr_t discard_buffer_dma;
+ size_t discard_size;
+ struct mx2_fmt_cfg *emma_prp;
+ struct emma_prp_resize resizing[2];
+ unsigned int s_width, s_height;
+ u32 frame_count;
+ struct vb2_alloc_ctx *alloc_ctx;
+};
+
+static struct mx2_buffer *mx2_ibuf_to_buf(struct mx2_buf_internal *int_buf)
+{
+ return container_of(int_buf, struct mx2_buffer, internal);
+}
+
+static struct mx2_fmt_cfg mx27_emma_prp_table[] = {
+ /*
+ * This is a generic configuration which is valid for most
+ * prp input-output format combinations.
+ * We set the incomming and outgoing pixelformat to a
+ * 16 Bit wide format and adjust the bytesperline
+ * accordingly. With this configuration the inputdata
+ * will not be changed by the emma and could be any type
+ * of 16 Bit Pixelformat.
+ */
+ {
+ .in_fmt = 0,
+ .out_fmt = 0,
+ .cfg = {
+ .channel = 1,
+ .in_fmt = PRP_CNTL_DATA_IN_RGB16,
+ .out_fmt = PRP_CNTL_CH1_OUT_RGB16,
+ .src_pixel = 0x2ca00565, /* RGB565 */
+ .ch1_pixel = 0x2ca00565, /* RGB565 */
+ .irq_flags = PRP_INTR_RDERR | PRP_INTR_CH1WERR |
+ PRP_INTR_CH1FC | PRP_INTR_LBOVF,
+ .csicr1 = 0,
+ }
+ },
+ {
+ .in_fmt = V4L2_MBUS_FMT_UYVY8_2X8,
+ .out_fmt = V4L2_PIX_FMT_YUYV,
+ .cfg = {
+ .channel = 1,
+ .in_fmt = PRP_CNTL_DATA_IN_YUV422,
+ .out_fmt = PRP_CNTL_CH1_OUT_YUV422,
+ .src_pixel = 0x22000888, /* YUV422 (YUYV) */
+ .ch1_pixel = 0x62000888, /* YUV422 (YUYV) */
+ .irq_flags = PRP_INTR_RDERR | PRP_INTR_CH1WERR |
+ PRP_INTR_CH1FC | PRP_INTR_LBOVF,
+ .csicr1 = CSICR1_SWAP16_EN,
+ }
+ },
+ {
+ .in_fmt = V4L2_MBUS_FMT_YUYV8_2X8,
+ .out_fmt = V4L2_PIX_FMT_YUYV,
+ .cfg = {
+ .channel = 1,
+ .in_fmt = PRP_CNTL_DATA_IN_YUV422,
+ .out_fmt = PRP_CNTL_CH1_OUT_YUV422,
+ .src_pixel = 0x22000888, /* YUV422 (YUYV) */
+ .ch1_pixel = 0x62000888, /* YUV422 (YUYV) */
+ .irq_flags = PRP_INTR_RDERR | PRP_INTR_CH1WERR |
+ PRP_INTR_CH1FC | PRP_INTR_LBOVF,
+ .csicr1 = CSICR1_PACK_DIR,
+ }
+ },
+ {
+ .in_fmt = V4L2_MBUS_FMT_YUYV8_2X8,
+ .out_fmt = V4L2_PIX_FMT_YUV420,
+ .cfg = {
+ .channel = 2,
+ .in_fmt = PRP_CNTL_DATA_IN_YUV422,
+ .out_fmt = PRP_CNTL_CH2_OUT_YUV420,
+ .src_pixel = 0x22000888, /* YUV422 (YUYV) */
+ .irq_flags = PRP_INTR_RDERR | PRP_INTR_CH2WERR |
+ PRP_INTR_CH2FC | PRP_INTR_LBOVF |
+ PRP_INTR_CH2OVF,
+ .csicr1 = CSICR1_PACK_DIR,
+ }
+ },
+ {
+ .in_fmt = V4L2_MBUS_FMT_UYVY8_2X8,
+ .out_fmt = V4L2_PIX_FMT_YUV420,
+ .cfg = {
+ .channel = 2,
+ .in_fmt = PRP_CNTL_DATA_IN_YUV422,
+ .out_fmt = PRP_CNTL_CH2_OUT_YUV420,
+ .src_pixel = 0x22000888, /* YUV422 (YUYV) */
+ .irq_flags = PRP_INTR_RDERR | PRP_INTR_CH2WERR |
+ PRP_INTR_CH2FC | PRP_INTR_LBOVF |
+ PRP_INTR_CH2OVF,
+ .csicr1 = CSICR1_SWAP16_EN,
+ }
+ },
+};
+
+static struct mx2_fmt_cfg *mx27_emma_prp_get_format(
+ enum v4l2_mbus_pixelcode in_fmt,
+ u32 out_fmt)
+{
+ int i;
+
+ for (i = 1; i < ARRAY_SIZE(mx27_emma_prp_table); i++)
+ if ((mx27_emma_prp_table[i].in_fmt == in_fmt) &&
+ (mx27_emma_prp_table[i].out_fmt == out_fmt)) {
+ return &mx27_emma_prp_table[i];
+ }
+ /* If no match return the most generic configuration */
+ return &mx27_emma_prp_table[0];
+};
+
+static void mx27_update_emma_buf(struct mx2_camera_dev *pcdev,
+ unsigned long phys, int bufnum)
+{
+ struct mx2_fmt_cfg *prp = pcdev->emma_prp;
+
+ if (prp->cfg.channel == 1) {
+ writel(phys, pcdev->base_emma +
+ PRP_DEST_RGB1_PTR + 4 * bufnum);
+ } else {
+ writel(phys, pcdev->base_emma +
+ PRP_DEST_Y_PTR - 0x14 * bufnum);
+ if (prp->out_fmt == V4L2_PIX_FMT_YUV420) {
+ u32 imgsize = pcdev->icd->user_height *
+ pcdev->icd->user_width;
+
+ writel(phys + imgsize, pcdev->base_emma +
+ PRP_DEST_CB_PTR - 0x14 * bufnum);
+ writel(phys + ((5 * imgsize) / 4), pcdev->base_emma +
+ PRP_DEST_CR_PTR - 0x14 * bufnum);
+ }
+ }
+}
+
+static void mx2_camera_deactivate(struct mx2_camera_dev *pcdev)
+{
+ unsigned long flags;
+
+ clk_disable_unprepare(pcdev->clk_csi);
+ writel(0, pcdev->base_csi + CSICR1);
+ if (cpu_is_mx27()) {
+ writel(0, pcdev->base_emma + PRP_CNTL);
+ } else if (cpu_is_mx25()) {
+ spin_lock_irqsave(&pcdev->lock, flags);
+ pcdev->fb1_active = NULL;
+ pcdev->fb2_active = NULL;
+ writel(0, pcdev->base_csi + CSIDMASA_FB1);
+ writel(0, pcdev->base_csi + CSIDMASA_FB2);
+ spin_unlock_irqrestore(&pcdev->lock, flags);
+ }
+}
+
+/*
+ * The following two functions absolutely depend on the fact, that
+ * there can be only one camera on mx2 camera sensor interface
+ */
+static int mx2_camera_add_device(struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx2_camera_dev *pcdev = ici->priv;
+ int ret;
+ u32 csicr1;
+
+ if (pcdev->icd)
+ return -EBUSY;
+
+ ret = clk_prepare_enable(pcdev->clk_csi);
+ if (ret < 0)
+ return ret;
+
+ csicr1 = CSICR1_MCLKEN;
+
+ if (cpu_is_mx27())
+ csicr1 |= CSICR1_PRP_IF_EN | CSICR1_FCC |
+ CSICR1_RXFF_LEVEL(0);
+
+ pcdev->csicr1 = csicr1;
+ writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
+
+ pcdev->icd = icd;
+ pcdev->frame_count = 0;
+
+ dev_info(icd->parent, "Camera driver attached to camera %d\n",
+ icd->devnum);
+
+ return 0;
+}
+
+static void mx2_camera_remove_device(struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx2_camera_dev *pcdev = ici->priv;
+
+ BUG_ON(icd != pcdev->icd);
+
+ dev_info(icd->parent, "Camera driver detached from camera %d\n",
+ icd->devnum);
+
+ mx2_camera_deactivate(pcdev);
+
+ pcdev->icd = NULL;
+}
+
+static void mx25_camera_frame_done(struct mx2_camera_dev *pcdev, int fb,
+ int state)
+{
+ struct vb2_buffer *vb;
+ struct mx2_buffer *buf;
+ struct mx2_buffer **fb_active = fb == 1 ? &pcdev->fb1_active :
+ &pcdev->fb2_active;
+ u32 fb_reg = fb == 1 ? CSIDMASA_FB1 : CSIDMASA_FB2;
+ unsigned long flags;
+
+ spin_lock_irqsave(&pcdev->lock, flags);
+
+ if (*fb_active == NULL)
+ goto out;
+
+ vb = &(*fb_active)->vb;
+ dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%p %lu\n", __func__,
+ vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
+
+ do_gettimeofday(&vb->v4l2_buf.timestamp);
+ vb->v4l2_buf.sequence++;
+ vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
+
+ if (list_empty(&pcdev->capture)) {
+ buf = NULL;
+ writel(0, pcdev->base_csi + fb_reg);
+ } else {
+ buf = list_first_entry(&pcdev->capture, struct mx2_buffer,
+ internal.queue);
+ vb = &buf->vb;
+ list_del(&buf->internal.queue);
+ buf->state = MX2_STATE_ACTIVE;
+ writel(vb2_dma_contig_plane_dma_addr(vb, 0),
+ pcdev->base_csi + fb_reg);
+ }
+
+ *fb_active = buf;
+
+out:
+ spin_unlock_irqrestore(&pcdev->lock, flags);
+}
+
+static irqreturn_t mx25_camera_irq(int irq_csi, void *data)
+{
+ struct mx2_camera_dev *pcdev = data;
+ u32 status = readl(pcdev->base_csi + CSISR);
+
+ if (status & CSISR_DMA_TSF_FB1_INT)
+ mx25_camera_frame_done(pcdev, 1, MX2_STATE_DONE);
+ else if (status & CSISR_DMA_TSF_FB2_INT)
+ mx25_camera_frame_done(pcdev, 2, MX2_STATE_DONE);
+
+ /* FIXME: handle CSISR_RFF_OR_INT */
+
+ writel(status, pcdev->base_csi + CSISR);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * Videobuf operations
+ */
+static int mx2_videobuf_setup(struct vb2_queue *vq,
+ const struct v4l2_format *fmt,
+ unsigned int *count, unsigned int *num_planes,
+ unsigned int sizes[], void *alloc_ctxs[])
+{
+ struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx2_camera_dev *pcdev = ici->priv;
+
+ dev_dbg(icd->parent, "count=%d, size=%d\n", *count, sizes[0]);
+
+ /* TODO: support for VIDIOC_CREATE_BUFS not ready */
+ if (fmt != NULL)
+ return -ENOTTY;
+
+ alloc_ctxs[0] = pcdev->alloc_ctx;
+
+ sizes[0] = icd->sizeimage;
+
+ if (0 == *count)
+ *count = 32;
+ if (!*num_planes &&
+ sizes[0] * *count > MAX_VIDEO_MEM * 1024 * 1024)
+ *count = (MAX_VIDEO_MEM * 1024 * 1024) / sizes[0];
+
+ *num_planes = 1;
+
+ return 0;
+}
+
+static int mx2_videobuf_prepare(struct vb2_buffer *vb)
+{
+ struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
+ int ret = 0;
+
+ dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
+ vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
+
+#ifdef DEBUG
+ /*
+ * This can be useful if you want to see if we actually fill
+ * the buffer with something
+ */
+ memset((void *)vb2_plane_vaddr(vb, 0),
+ 0xaa, vb2_get_plane_payload(vb, 0));
+#endif
+
+ vb2_set_plane_payload(vb, 0, icd->sizeimage);
+ if (vb2_plane_vaddr(vb, 0) &&
+ vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ return 0;
+
+out:
+ return ret;
+}
+
+static void mx2_videobuf_queue(struct vb2_buffer *vb)
+{
+ struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
+ struct soc_camera_host *ici =
+ to_soc_camera_host(icd->parent);
+ struct mx2_camera_dev *pcdev = ici->priv;
+ struct mx2_buffer *buf = container_of(vb, struct mx2_buffer, vb);
+ unsigned long flags;
+
+ dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
+ vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
+
+ spin_lock_irqsave(&pcdev->lock, flags);
+
+ buf->state = MX2_STATE_QUEUED;
+ list_add_tail(&buf->internal.queue, &pcdev->capture);
+
+ if (cpu_is_mx25()) {
+ u32 csicr3, dma_inten = 0;
+
+ if (pcdev->fb1_active == NULL) {
+ writel(vb2_dma_contig_plane_dma_addr(vb, 0),
+ pcdev->base_csi + CSIDMASA_FB1);
+ pcdev->fb1_active = buf;
+ dma_inten = CSICR1_FB1_DMA_INTEN;
+ } else if (pcdev->fb2_active == NULL) {
+ writel(vb2_dma_contig_plane_dma_addr(vb, 0),
+ pcdev->base_csi + CSIDMASA_FB2);
+ pcdev->fb2_active = buf;
+ dma_inten = CSICR1_FB2_DMA_INTEN;
+ }
+
+ if (dma_inten) {
+ list_del(&buf->internal.queue);
+ buf->state = MX2_STATE_ACTIVE;
+
+ csicr3 = readl(pcdev->base_csi + CSICR3);
+
+ /* Reflash DMA */
+ writel(csicr3 | CSICR3_DMA_REFLASH_RFF,
+ pcdev->base_csi + CSICR3);
+
+ /* clear & enable interrupts */
+ writel(dma_inten, pcdev->base_csi + CSISR);
+ pcdev->csicr1 |= dma_inten;
+ writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
+
+ /* enable DMA */
+ csicr3 |= CSICR3_DMA_REQ_EN_RFF | CSICR3_RXFF_LEVEL(1);
+ writel(csicr3, pcdev->base_csi + CSICR3);
+ }
+ }
+
+ spin_unlock_irqrestore(&pcdev->lock, flags);
+}
+
+static void mx2_videobuf_release(struct vb2_buffer *vb)
+{
+ struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx2_camera_dev *pcdev = ici->priv;
+ struct mx2_buffer *buf = container_of(vb, struct mx2_buffer, vb);
+ unsigned long flags;
+
+#ifdef DEBUG
+ dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
+ vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
+
+ switch (buf->state) {
+ case MX2_STATE_ACTIVE:
+ dev_info(icd->parent, "%s (active)\n", __func__);
+ break;
+ case MX2_STATE_QUEUED:
+ dev_info(icd->parent, "%s (queued)\n", __func__);
+ break;
+ default:
+ dev_info(icd->parent, "%s (unknown) %d\n", __func__,
+ buf->state);
+ break;
+ }
+#endif
+
+ /*
+ * Terminate only queued but inactive buffers. Active buffers are
+ * released when they become inactive after videobuf_waiton().
+ *
+ * FIXME: implement forced termination of active buffers for mx27 and
+ * mx27 eMMA, so that the user won't get stuck in an uninterruptible
+ * state. This requires a specific handling for each of the these DMA
+ * types.
+ */
+
+ spin_lock_irqsave(&pcdev->lock, flags);
+ if (cpu_is_mx25() && buf->state == MX2_STATE_ACTIVE) {
+ if (pcdev->fb1_active == buf) {
+ pcdev->csicr1 &= ~CSICR1_FB1_DMA_INTEN;
+ writel(0, pcdev->base_csi + CSIDMASA_FB1);
+ pcdev->fb1_active = NULL;
+ } else if (pcdev->fb2_active == buf) {
+ pcdev->csicr1 &= ~CSICR1_FB2_DMA_INTEN;
+ writel(0, pcdev->base_csi + CSIDMASA_FB2);
+ pcdev->fb2_active = NULL;
+ }
+ writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
+ }
+ spin_unlock_irqrestore(&pcdev->lock, flags);
+}
+
+static void mx27_camera_emma_buf_init(struct soc_camera_device *icd,
+ int bytesperline)
+{
+ struct soc_camera_host *ici =
+ to_soc_camera_host(icd->parent);
+ struct mx2_camera_dev *pcdev = ici->priv;
+ struct mx2_fmt_cfg *prp = pcdev->emma_prp;
+
+ writel((pcdev->s_width << 16) | pcdev->s_height,
+ pcdev->base_emma + PRP_SRC_FRAME_SIZE);
+ writel(prp->cfg.src_pixel,
+ pcdev->base_emma + PRP_SRC_PIXEL_FORMAT_CNTL);
+ if (prp->cfg.channel == 1) {
+ writel((icd->user_width << 16) | icd->user_height,
+ pcdev->base_emma + PRP_CH1_OUT_IMAGE_SIZE);
+ writel(bytesperline,
+ pcdev->base_emma + PRP_DEST_CH1_LINE_STRIDE);
+ writel(prp->cfg.ch1_pixel,
+ pcdev->base_emma + PRP_CH1_PIXEL_FORMAT_CNTL);
+ } else { /* channel 2 */
+ writel((icd->user_width << 16) | icd->user_height,
+ pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE);
+ }
+
+ /* Enable interrupts */
+ writel(prp->cfg.irq_flags, pcdev->base_emma + PRP_INTR_CNTL);
+}
+
+static void mx2_prp_resize_commit(struct mx2_camera_dev *pcdev)
+{
+ int dir;
+
+ for (dir = RESIZE_DIR_H; dir <= RESIZE_DIR_V; dir++) {
+ unsigned char *s = pcdev->resizing[dir].s;
+ int len = pcdev->resizing[dir].len;
+ unsigned int coeff[2] = {0, 0};
+ unsigned int valid = 0;
+ int i;
+
+ if (len == 0)
+ continue;
+
+ for (i = RESIZE_NUM_MAX - 1; i >= 0; i--) {
+ int j;
+
+ j = i > 9 ? 1 : 0;
+ coeff[j] = (coeff[j] << BC_COEF) |
+ (s[i] & (SZ_COEF - 1));
+
+ if (i == 5 || i == 15)
+ coeff[j] <<= 1;
+
+ valid = (valid << 1) | (s[i] >> BC_COEF);
+ }
+
+ valid |= PRP_RZ_VALID_TBL_LEN(len);
+
+ if (pcdev->resizing[dir].algo == RESIZE_ALGO_BILINEAR)
+ valid |= PRP_RZ_VALID_BILINEAR;
+
+ if (pcdev->emma_prp->cfg.channel == 1) {
+ if (dir == RESIZE_DIR_H) {
+ writel(coeff[0], pcdev->base_emma +
+ PRP_CH1_RZ_HORI_COEF1);
+ writel(coeff[1], pcdev->base_emma +
+ PRP_CH1_RZ_HORI_COEF2);
+ writel(valid, pcdev->base_emma +
+ PRP_CH1_RZ_HORI_VALID);
+ } else {
+ writel(coeff[0], pcdev->base_emma +
+ PRP_CH1_RZ_VERT_COEF1);
+ writel(coeff[1], pcdev->base_emma +
+ PRP_CH1_RZ_VERT_COEF2);
+ writel(valid, pcdev->base_emma +
+ PRP_CH1_RZ_VERT_VALID);
+ }
+ } else {
+ if (dir == RESIZE_DIR_H) {
+ writel(coeff[0], pcdev->base_emma +
+ PRP_CH2_RZ_HORI_COEF1);
+ writel(coeff[1], pcdev->base_emma +
+ PRP_CH2_RZ_HORI_COEF2);
+ writel(valid, pcdev->base_emma +
+ PRP_CH2_RZ_HORI_VALID);
+ } else {
+ writel(coeff[0], pcdev->base_emma +
+ PRP_CH2_RZ_VERT_COEF1);
+ writel(coeff[1], pcdev->base_emma +
+ PRP_CH2_RZ_VERT_COEF2);
+ writel(valid, pcdev->base_emma +
+ PRP_CH2_RZ_VERT_VALID);
+ }
+ }
+ }
+}
+
+static int mx2_start_streaming(struct vb2_queue *q, unsigned int count)
+{
+ struct soc_camera_device *icd = soc_camera_from_vb2q(q);
+ struct soc_camera_host *ici =
+ to_soc_camera_host(icd->parent);
+ struct mx2_camera_dev *pcdev = ici->priv;
+ struct mx2_fmt_cfg *prp = pcdev->emma_prp;
+ struct vb2_buffer *vb;
+ struct mx2_buffer *buf;
+ unsigned long phys;
+ int bytesperline;
+
+ if (cpu_is_mx27()) {
+ unsigned long flags;
+ if (count < 2)
+ return -EINVAL;
+
+ spin_lock_irqsave(&pcdev->lock, flags);
+
+ buf = list_first_entry(&pcdev->capture, struct mx2_buffer,
+ internal.queue);
+ buf->internal.bufnum = 0;
+ vb = &buf->vb;
+ buf->state = MX2_STATE_ACTIVE;
+
+ phys = vb2_dma_contig_plane_dma_addr(vb, 0);
+ mx27_update_emma_buf(pcdev, phys, buf->internal.bufnum);
+ list_move_tail(pcdev->capture.next, &pcdev->active_bufs);
+
+ buf = list_first_entry(&pcdev->capture, struct mx2_buffer,
+ internal.queue);
+ buf->internal.bufnum = 1;
+ vb = &buf->vb;
+ buf->state = MX2_STATE_ACTIVE;
+
+ phys = vb2_dma_contig_plane_dma_addr(vb, 0);
+ mx27_update_emma_buf(pcdev, phys, buf->internal.bufnum);
+ list_move_tail(pcdev->capture.next, &pcdev->active_bufs);
+
+ bytesperline = soc_mbus_bytes_per_line(icd->user_width,
+ icd->current_fmt->host_fmt);
+ if (bytesperline < 0)
+ return bytesperline;
+
+ /*
+ * I didn't manage to properly enable/disable the prp
+ * on a per frame basis during running transfers,
+ * thus we allocate a buffer here and use it to
+ * discard frames when no buffer is available.
+ * Feel free to work on this ;)
+ */
+ pcdev->discard_size = icd->user_height * bytesperline;
+ pcdev->discard_buffer = dma_alloc_coherent(ici->v4l2_dev.dev,
+ pcdev->discard_size, &pcdev->discard_buffer_dma,
+ GFP_KERNEL);
+ if (!pcdev->discard_buffer)
+ return -ENOMEM;
+
+ pcdev->buf_discard[0].discard = true;
+ list_add_tail(&pcdev->buf_discard[0].queue,
+ &pcdev->discard);
+
+ pcdev->buf_discard[1].discard = true;
+ list_add_tail(&pcdev->buf_discard[1].queue,
+ &pcdev->discard);
+
+ mx2_prp_resize_commit(pcdev);
+
+ mx27_camera_emma_buf_init(icd, bytesperline);
+
+ if (prp->cfg.channel == 1) {
+ writel(PRP_CNTL_CH1EN |
+ PRP_CNTL_CSIEN |
+ prp->cfg.in_fmt |
+ prp->cfg.out_fmt |
+ PRP_CNTL_CH1_LEN |
+ PRP_CNTL_CH1BYP |
+ PRP_CNTL_CH1_TSKIP(0) |
+ PRP_CNTL_IN_TSKIP(0),
+ pcdev->base_emma + PRP_CNTL);
+ } else {
+ writel(PRP_CNTL_CH2EN |
+ PRP_CNTL_CSIEN |
+ prp->cfg.in_fmt |
+ prp->cfg.out_fmt |
+ PRP_CNTL_CH2_LEN |
+ PRP_CNTL_CH2_TSKIP(0) |
+ PRP_CNTL_IN_TSKIP(0),
+ pcdev->base_emma + PRP_CNTL);
+ }
+ spin_unlock_irqrestore(&pcdev->lock, flags);
+ }
+
+ return 0;
+}
+
+static int mx2_stop_streaming(struct vb2_queue *q)
+{
+ struct soc_camera_device *icd = soc_camera_from_vb2q(q);
+ struct soc_camera_host *ici =
+ to_soc_camera_host(icd->parent);
+ struct mx2_camera_dev *pcdev = ici->priv;
+ struct mx2_fmt_cfg *prp = pcdev->emma_prp;
+ unsigned long flags;
+ void *b;
+ u32 cntl;
+
+ if (cpu_is_mx27()) {
+ spin_lock_irqsave(&pcdev->lock, flags);
+
+ cntl = readl(pcdev->base_emma + PRP_CNTL);
+ if (prp->cfg.channel == 1) {
+ writel(cntl & ~PRP_CNTL_CH1EN,
+ pcdev->base_emma + PRP_CNTL);
+ } else {
+ writel(cntl & ~PRP_CNTL_CH2EN,
+ pcdev->base_emma + PRP_CNTL);
+ }
+ INIT_LIST_HEAD(&pcdev->capture);
+ INIT_LIST_HEAD(&pcdev->active_bufs);
+ INIT_LIST_HEAD(&pcdev->discard);
+
+ b = pcdev->discard_buffer;
+ pcdev->discard_buffer = NULL;
+
+ spin_unlock_irqrestore(&pcdev->lock, flags);
+
+ dma_free_coherent(ici->v4l2_dev.dev,
+ pcdev->discard_size, b, pcdev->discard_buffer_dma);
+ }
+
+ return 0;
+}
+
+static struct vb2_ops mx2_videobuf_ops = {
+ .queue_setup = mx2_videobuf_setup,
+ .buf_prepare = mx2_videobuf_prepare,
+ .buf_queue = mx2_videobuf_queue,
+ .buf_cleanup = mx2_videobuf_release,
+ .start_streaming = mx2_start_streaming,
+ .stop_streaming = mx2_stop_streaming,
+};
+
+static int mx2_camera_init_videobuf(struct vb2_queue *q,
+ struct soc_camera_device *icd)
+{
+ q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ q->io_modes = VB2_MMAP | VB2_USERPTR;
+ q->drv_priv = icd;
+ q->ops = &mx2_videobuf_ops;
+ q->mem_ops = &vb2_dma_contig_memops;
+ q->buf_struct_size = sizeof(struct mx2_buffer);
+
+ return vb2_queue_init(q);
+}
+
+#define MX2_BUS_FLAGS (V4L2_MBUS_MASTER | \
+ V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
+ V4L2_MBUS_VSYNC_ACTIVE_LOW | \
+ V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
+ V4L2_MBUS_HSYNC_ACTIVE_LOW | \
+ V4L2_MBUS_PCLK_SAMPLE_RISING | \
+ V4L2_MBUS_PCLK_SAMPLE_FALLING | \
+ V4L2_MBUS_DATA_ACTIVE_HIGH | \
+ V4L2_MBUS_DATA_ACTIVE_LOW)
+
+static int mx27_camera_emma_prp_reset(struct mx2_camera_dev *pcdev)
+{
+ u32 cntl;
+ int count = 0;
+
+ cntl = readl(pcdev->base_emma + PRP_CNTL);
+ writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL);
+ while (count++ < 100) {
+ if (!(readl(pcdev->base_emma + PRP_CNTL) & PRP_CNTL_SWRST))
+ return 0;
+ barrier();
+ udelay(1);
+ }
+
+ return -ETIMEDOUT;
+}
+
+static int mx2_camera_set_bus_param(struct soc_camera_device *icd)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx2_camera_dev *pcdev = ici->priv;
+ struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
+ unsigned long common_flags;
+ int ret;
+ int bytesperline;
+ u32 csicr1 = pcdev->csicr1;
+
+ ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
+ if (!ret) {
+ common_flags = soc_mbus_config_compatible(&cfg, MX2_BUS_FLAGS);
+ if (!common_flags) {
+ dev_warn(icd->parent,
+ "Flags incompatible: camera 0x%x, host 0x%x\n",
+ cfg.flags, MX2_BUS_FLAGS);
+ return -EINVAL;
+ }
+ } else if (ret != -ENOIOCTLCMD) {
+ return ret;
+ } else {
+ common_flags = MX2_BUS_FLAGS;
+ }
+
+ if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
+ (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
+ if (pcdev->platform_flags & MX2_CAMERA_HSYNC_HIGH)
+ common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
+ else
+ common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
+ }
+
+ if ((common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) &&
+ (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)) {
+ if (pcdev->platform_flags & MX2_CAMERA_PCLK_SAMPLE_RISING)
+ common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_FALLING;
+ else
+ common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_RISING;
+ }
+
+ cfg.flags = common_flags;
+ ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
+ if (ret < 0 && ret != -ENOIOCTLCMD) {
+ dev_dbg(icd->parent, "camera s_mbus_config(0x%lx) returned %d\n",
+ common_flags, ret);
+ return ret;
+ }
+
+ csicr1 = (csicr1 & ~CSICR1_FMT_MASK) | pcdev->emma_prp->cfg.csicr1;
+
+ if (common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
+ csicr1 |= CSICR1_REDGE;
+ if (common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
+ csicr1 |= CSICR1_SOF_POL;
+ if (common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
+ csicr1 |= CSICR1_HSYNC_POL;
+ if (pcdev->platform_flags & MX2_CAMERA_EXT_VSYNC)
+ csicr1 |= CSICR1_EXT_VSYNC;
+ if (pcdev->platform_flags & MX2_CAMERA_CCIR)
+ csicr1 |= CSICR1_CCIR_EN;
+ if (pcdev->platform_flags & MX2_CAMERA_CCIR_INTERLACE)
+ csicr1 |= CSICR1_CCIR_MODE;
+ if (pcdev->platform_flags & MX2_CAMERA_GATED_CLOCK)
+ csicr1 |= CSICR1_GCLK_MODE;
+ if (pcdev->platform_flags & MX2_CAMERA_INV_DATA)
+ csicr1 |= CSICR1_INV_DATA;
+
+ pcdev->csicr1 = csicr1;
+
+ bytesperline = soc_mbus_bytes_per_line(icd->user_width,
+ icd->current_fmt->host_fmt);
+ if (bytesperline < 0)
+ return bytesperline;
+
+ if (cpu_is_mx27()) {
+ ret = mx27_camera_emma_prp_reset(pcdev);
+ if (ret)
+ return ret;
+ } else if (cpu_is_mx25()) {
+ writel((bytesperline * icd->user_height) >> 2,
+ pcdev->base_csi + CSIRXCNT);
+ writel((bytesperline << 16) | icd->user_height,
+ pcdev->base_csi + CSIIMAG_PARA);
+ }
+
+ writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
+
+ return 0;
+}
+
+static int mx2_camera_set_crop(struct soc_camera_device *icd,
+ struct v4l2_crop *a)
+{
+ struct v4l2_rect *rect = &a->c;
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ struct v4l2_mbus_framefmt mf;
+ int ret;
+
+ soc_camera_limit_side(&rect->left, &rect->width, 0, 2, 4096);
+ soc_camera_limit_side(&rect->top, &rect->height, 0, 2, 4096);
+
+ ret = v4l2_subdev_call(sd, video, s_crop, a);
+ if (ret < 0)
+ return ret;
+
+ /* The capture device might have changed its output */
+ ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
+ if (ret < 0)
+ return ret;
+
+ dev_dbg(icd->parent, "Sensor cropped %dx%d\n",
+ mf.width, mf.height);
+
+ icd->user_width = mf.width;
+ icd->user_height = mf.height;
+
+ return ret;
+}
+
+static int mx2_camera_get_formats(struct soc_camera_device *icd,
+ unsigned int idx,
+ struct soc_camera_format_xlate *xlate)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ const struct soc_mbus_pixelfmt *fmt;
+ struct device *dev = icd->parent;
+ enum v4l2_mbus_pixelcode code;
+ int ret, formats = 0;
+
+ ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
+ if (ret < 0)
+ /* no more formats */
+ return 0;
+
+ fmt = soc_mbus_get_fmtdesc(code);
+ if (!fmt) {
+ dev_err(dev, "Invalid format code #%u: %d\n", idx, code);
+ return 0;
+ }
+
+ if (code == V4L2_MBUS_FMT_YUYV8_2X8 ||
+ code == V4L2_MBUS_FMT_UYVY8_2X8) {
+ formats++;
+ if (xlate) {
+ /*
+ * CH2 can output YUV420 which is a standard format in
+ * soc_mediabus.c
+ */
+ xlate->host_fmt =
+ soc_mbus_get_fmtdesc(V4L2_MBUS_FMT_YUYV8_1_5X8);
+ xlate->code = code;
+ dev_dbg(dev, "Providing host format %s for sensor code %d\n",
+ xlate->host_fmt->name, code);
+ xlate++;
+ }
+ }
+
+ if (code == V4L2_MBUS_FMT_UYVY8_2X8) {
+ formats++;
+ if (xlate) {
+ xlate->host_fmt =
+ soc_mbus_get_fmtdesc(V4L2_MBUS_FMT_YUYV8_2X8);
+ xlate->code = code;
+ dev_dbg(dev, "Providing host format %s for sensor code %d\n",
+ xlate->host_fmt->name, code);
+ xlate++;
+ }
+ }
+
+ /* Generic pass-trough */
+ formats++;
+ if (xlate) {
+ xlate->host_fmt = fmt;
+ xlate->code = code;
+ xlate++;
+ }
+ return formats;
+}
+
+static int mx2_emmaprp_resize(struct mx2_camera_dev *pcdev,
+ struct v4l2_mbus_framefmt *mf_in,
+ struct v4l2_pix_format *pix_out, bool apply)
+{
+ int num, den;
+ unsigned long m;
+ int i, dir;
+
+ for (dir = RESIZE_DIR_H; dir <= RESIZE_DIR_V; dir++) {
+ struct emma_prp_resize tmprsz;
+ unsigned char *s = tmprsz.s;
+ int len = 0;
+ int in, out;
+
+ if (dir == RESIZE_DIR_H) {
+ in = mf_in->width;
+ out = pix_out->width;
+ } else {
+ in = mf_in->height;
+ out = pix_out->height;
+ }
+
+ if (in < out)
+ return -EINVAL;
+ else if (in == out)
+ continue;
+
+ /* Calculate ratio */
+ m = gcd(in, out);
+ num = in / m;
+ den = out / m;
+ if (num > RESIZE_NUM_MAX)
+ return -EINVAL;
+
+ if ((num >= 2 * den) && (den == 1) &&
+ (num < 9) && (!(num & 0x01))) {
+ int sum = 0;
+ int j;
+
+ /* Average scaling for >= 2:1 ratios */
+ /* Support can be added for num >=9 and odd values */
+
+ tmprsz.algo = RESIZE_ALGO_AVERAGING;
+ len = num;
+
+ for (i = 0; i < (len / 2); i++)
+ s[i] = 8;
+
+ do {
+ for (i = 0; i < (len / 2); i++) {
+ s[i] = s[i] >> 1;
+ sum = 0;
+ for (j = 0; j < (len / 2); j++)
+ sum += s[j];
+ if (sum == 4)
+ break;
+ }
+ } while (sum != 4);
+
+ for (i = (len / 2); i < len; i++)
+ s[i] = s[len - i - 1];
+
+ s[len - 1] |= SZ_COEF;
+ } else {
+ /* bilinear scaling for < 2:1 ratios */
+ int v; /* overflow counter */
+ int coeff, nxt; /* table output */
+ int in_pos_inc = 2 * den;
+ int out_pos = num;
+ int out_pos_inc = 2 * num;
+ int init_carry = num - den;
+ int carry = init_carry;
+
+ tmprsz.algo = RESIZE_ALGO_BILINEAR;
+ v = den + in_pos_inc;
+ do {
+ coeff = v - out_pos;
+ out_pos += out_pos_inc;
+ carry += out_pos_inc;
+ for (nxt = 0; v < out_pos; nxt++) {
+ v += in_pos_inc;
+ carry -= in_pos_inc;
+ }
+
+ if (len > RESIZE_NUM_MAX)
+ return -EINVAL;
+
+ coeff = ((coeff << BC_COEF) +
+ (in_pos_inc >> 1)) / in_pos_inc;
+
+ if (coeff >= (SZ_COEF - 1))
+ coeff--;
+
+ coeff |= SZ_COEF;
+ s[len] = (unsigned char)coeff;
+ len++;
+
+ for (i = 1; i < nxt; i++) {
+ if (len >= RESIZE_NUM_MAX)
+ return -EINVAL;
+ s[len] = 0;
+ len++;
+ }
+ } while (carry != init_carry);
+ }
+ tmprsz.len = len;
+ if (dir == RESIZE_DIR_H)
+ mf_in->width = pix_out->width;
+ else
+ mf_in->height = pix_out->height;
+
+ if (apply)
+ memcpy(&pcdev->resizing[dir], &tmprsz, sizeof(tmprsz));
+ }
+ return 0;
+}
+
+static int mx2_camera_set_fmt(struct soc_camera_device *icd,
+ struct v4l2_format *f)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx2_camera_dev *pcdev = ici->priv;
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ const struct soc_camera_format_xlate *xlate;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct v4l2_mbus_framefmt mf;
+ int ret;
+
+ dev_dbg(icd->parent, "%s: requested params: width = %d, height = %d\n",
+ __func__, pix->width, pix->height);
+
+ xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
+ if (!xlate) {
+ dev_warn(icd->parent, "Format %x not found\n",
+ pix->pixelformat);
+ return -EINVAL;
+ }
+
+ mf.width = pix->width;
+ mf.height = pix->height;
+ mf.field = pix->field;
+ mf.colorspace = pix->colorspace;
+ mf.code = xlate->code;
+
+ ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf);
+ if (ret < 0 && ret != -ENOIOCTLCMD)
+ return ret;
+
+ /* Store width and height returned by the sensor for resizing */
+ pcdev->s_width = mf.width;
+ pcdev->s_height = mf.height;
+ dev_dbg(icd->parent, "%s: sensor params: width = %d, height = %d\n",
+ __func__, pcdev->s_width, pcdev->s_height);
+
+ pcdev->emma_prp = mx27_emma_prp_get_format(xlate->code,
+ xlate->host_fmt->fourcc);
+
+ memset(pcdev->resizing, 0, sizeof(pcdev->resizing));
+ if ((mf.width != pix->width || mf.height != pix->height) &&
+ pcdev->emma_prp->cfg.in_fmt == PRP_CNTL_DATA_IN_YUV422) {
+ if (mx2_emmaprp_resize(pcdev, &mf, pix, true) < 0)
+ dev_dbg(icd->parent, "%s: can't resize\n", __func__);
+ }
+
+ if (mf.code != xlate->code)
+ return -EINVAL;
+
+ pix->width = mf.width;
+ pix->height = mf.height;
+ pix->field = mf.field;
+ pix->colorspace = mf.colorspace;
+ icd->current_fmt = xlate;
+
+ dev_dbg(icd->parent, "%s: returned params: width = %d, height = %d\n",
+ __func__, pix->width, pix->height);
+
+ return 0;
+}
+
+static int mx2_camera_try_fmt(struct soc_camera_device *icd,
+ struct v4l2_format *f)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ const struct soc_camera_format_xlate *xlate;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct v4l2_mbus_framefmt mf;
+ __u32 pixfmt = pix->pixelformat;
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx2_camera_dev *pcdev = ici->priv;
+ unsigned int width_limit;
+ int ret;
+
+ dev_dbg(icd->parent, "%s: requested params: width = %d, height = %d\n",
+ __func__, pix->width, pix->height);
+
+ xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
+ if (pixfmt && !xlate) {
+ dev_warn(icd->parent, "Format %x not found\n", pixfmt);
+ return -EINVAL;
+ }
+
+ /* FIXME: implement MX27 limits */
+
+ /* limit to MX25 hardware capabilities */
+ if (cpu_is_mx25()) {
+ if (xlate->host_fmt->bits_per_sample <= 8)
+ width_limit = 0xffff * 4;
+ else
+ width_limit = 0xffff * 2;
+ /* CSIIMAG_PARA limit */
+ if (pix->width > width_limit)
+ pix->width = width_limit;
+ if (pix->height > 0xffff)
+ pix->height = 0xffff;
+
+ pix->bytesperline = soc_mbus_bytes_per_line(pix->width,
+ xlate->host_fmt);
+ if (pix->bytesperline < 0)
+ return pix->bytesperline;
+ pix->sizeimage = soc_mbus_image_size(xlate->host_fmt,
+ pix->bytesperline, pix->height);
+ /* Check against the CSIRXCNT limit */
+ if (pix->sizeimage > 4 * 0x3ffff) {
+ /* Adjust geometry, preserve aspect ratio */
+ unsigned int new_height = int_sqrt(div_u64(0x3ffffULL *
+ 4 * pix->height, pix->bytesperline));
+ pix->width = new_height * pix->width / pix->height;
+ pix->height = new_height;
+ pix->bytesperline = soc_mbus_bytes_per_line(pix->width,
+ xlate->host_fmt);
+ BUG_ON(pix->bytesperline < 0);
+ pix->sizeimage = soc_mbus_image_size(xlate->host_fmt,
+ pix->bytesperline, pix->height);
+ }
+ }
+
+ /* limit to sensor capabilities */
+ mf.width = pix->width;
+ mf.height = pix->height;
+ mf.field = pix->field;
+ mf.colorspace = pix->colorspace;
+ mf.code = xlate->code;
+
+ ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf);
+ if (ret < 0)
+ return ret;
+
+ dev_dbg(icd->parent, "%s: sensor params: width = %d, height = %d\n",
+ __func__, pcdev->s_width, pcdev->s_height);
+
+ /* If the sensor does not support image size try PrP resizing */
+ pcdev->emma_prp = mx27_emma_prp_get_format(xlate->code,
+ xlate->host_fmt->fourcc);
+
+ memset(pcdev->resizing, 0, sizeof(pcdev->resizing));
+ if ((mf.width != pix->width || mf.height != pix->height) &&
+ pcdev->emma_prp->cfg.in_fmt == PRP_CNTL_DATA_IN_YUV422) {
+ if (mx2_emmaprp_resize(pcdev, &mf, pix, false) < 0)
+ dev_dbg(icd->parent, "%s: can't resize\n", __func__);
+ }
+
+ if (mf.field == V4L2_FIELD_ANY)
+ mf.field = V4L2_FIELD_NONE;
+ /*
+ * Driver supports interlaced images provided they have
+ * both fields so that they can be processed as if they
+ * were progressive.
+ */
+ if (mf.field != V4L2_FIELD_NONE && !V4L2_FIELD_HAS_BOTH(mf.field)) {
+ dev_err(icd->parent, "Field type %d unsupported.\n",
+ mf.field);
+ return -EINVAL;
+ }
+
+ pix->width = mf.width;
+ pix->height = mf.height;
+ pix->field = mf.field;
+ pix->colorspace = mf.colorspace;
+
+ dev_dbg(icd->parent, "%s: returned params: width = %d, height = %d\n",
+ __func__, pix->width, pix->height);
+
+ return 0;
+}
+
+static int mx2_camera_querycap(struct soc_camera_host *ici,
+ struct v4l2_capability *cap)
+{
+ /* cap->name is set by the friendly caller:-> */
+ strlcpy(cap->card, MX2_CAM_DRIVER_DESCRIPTION, sizeof(cap->card));
+ cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
+
+ return 0;
+}
+
+static unsigned int mx2_camera_poll(struct file *file, poll_table *pt)
+{
+ struct soc_camera_device *icd = file->private_data;
+
+ return vb2_poll(&icd->vb2_vidq, file, pt);
+}
+
+static struct soc_camera_host_ops mx2_soc_camera_host_ops = {
+ .owner = THIS_MODULE,
+ .add = mx2_camera_add_device,
+ .remove = mx2_camera_remove_device,
+ .set_fmt = mx2_camera_set_fmt,
+ .set_crop = mx2_camera_set_crop,
+ .get_formats = mx2_camera_get_formats,
+ .try_fmt = mx2_camera_try_fmt,
+ .init_videobuf2 = mx2_camera_init_videobuf,
+ .poll = mx2_camera_poll,
+ .querycap = mx2_camera_querycap,
+ .set_bus_param = mx2_camera_set_bus_param,
+};
+
+static void mx27_camera_frame_done_emma(struct mx2_camera_dev *pcdev,
+ int bufnum, bool err)
+{
+#ifdef DEBUG
+ struct mx2_fmt_cfg *prp = pcdev->emma_prp;
+#endif
+ struct mx2_buf_internal *ibuf;
+ struct mx2_buffer *buf;
+ struct vb2_buffer *vb;
+ unsigned long phys;
+
+ ibuf = list_first_entry(&pcdev->active_bufs, struct mx2_buf_internal,
+ queue);
+
+ BUG_ON(ibuf->bufnum != bufnum);
+
+ if (ibuf->discard) {
+ /*
+ * Discard buffer must not be returned to user space.
+ * Just return it to the discard queue.
+ */
+ list_move_tail(pcdev->active_bufs.next, &pcdev->discard);
+ } else {
+ buf = mx2_ibuf_to_buf(ibuf);
+
+ vb = &buf->vb;
+#ifdef DEBUG
+ phys = vb2_dma_contig_plane_dma_addr(vb, 0);
+ if (prp->cfg.channel == 1) {
+ if (readl(pcdev->base_emma + PRP_DEST_RGB1_PTR +
+ 4 * bufnum) != phys) {
+ dev_err(pcdev->dev, "%lx != %x\n", phys,
+ readl(pcdev->base_emma +
+ PRP_DEST_RGB1_PTR + 4 * bufnum));
+ }
+ } else {
+ if (readl(pcdev->base_emma + PRP_DEST_Y_PTR -
+ 0x14 * bufnum) != phys) {
+ dev_err(pcdev->dev, "%lx != %x\n", phys,
+ readl(pcdev->base_emma +
+ PRP_DEST_Y_PTR - 0x14 * bufnum));
+ }
+ }
+#endif
+ dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%p %lu\n", __func__, vb,
+ vb2_plane_vaddr(vb, 0),
+ vb2_get_plane_payload(vb, 0));
+
+ list_del_init(&buf->internal.queue);
+ do_gettimeofday(&vb->v4l2_buf.timestamp);
+ vb->v4l2_buf.sequence = pcdev->frame_count;
+ if (err)
+ vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
+ else
+ vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
+ }
+
+ pcdev->frame_count++;
+
+ if (list_empty(&pcdev->capture)) {
+ if (list_empty(&pcdev->discard)) {
+ dev_warn(pcdev->dev, "%s: trying to access empty discard list\n",
+ __func__);
+ return;
+ }
+
+ ibuf = list_first_entry(&pcdev->discard,
+ struct mx2_buf_internal, queue);
+ ibuf->bufnum = bufnum;
+
+ list_move_tail(pcdev->discard.next, &pcdev->active_bufs);
+ mx27_update_emma_buf(pcdev, pcdev->discard_buffer_dma, bufnum);
+ return;
+ }
+
+ buf = list_first_entry(&pcdev->capture, struct mx2_buffer,
+ internal.queue);
+
+ buf->internal.bufnum = bufnum;
+
+ list_move_tail(pcdev->capture.next, &pcdev->active_bufs);
+
+ vb = &buf->vb;
+ buf->state = MX2_STATE_ACTIVE;
+
+ phys = vb2_dma_contig_plane_dma_addr(vb, 0);
+ mx27_update_emma_buf(pcdev, phys, bufnum);
+}
+
+static irqreturn_t mx27_camera_emma_irq(int irq_emma, void *data)
+{
+ struct mx2_camera_dev *pcdev = data;
+ unsigned int status = readl(pcdev->base_emma + PRP_INTRSTATUS);
+ struct mx2_buf_internal *ibuf;
+
+ spin_lock(&pcdev->lock);
+
+ if (list_empty(&pcdev->active_bufs)) {
+ dev_warn(pcdev->dev, "%s: called while active list is empty\n",
+ __func__);
+
+ if (!status) {
+ spin_unlock(&pcdev->lock);
+ return IRQ_NONE;
+ }
+ }
+
+ if (status & (1 << 7)) { /* overflow */
+ u32 cntl = readl(pcdev->base_emma + PRP_CNTL);
+ writel(cntl & ~(PRP_CNTL_CH1EN | PRP_CNTL_CH2EN),
+ pcdev->base_emma + PRP_CNTL);
+ writel(cntl, pcdev->base_emma + PRP_CNTL);
+
+ ibuf = list_first_entry(&pcdev->active_bufs,
+ struct mx2_buf_internal, queue);
+ mx27_camera_frame_done_emma(pcdev,
+ ibuf->bufnum, true);
+
+ status &= ~(1 << 7);
+ } else if (((status & (3 << 5)) == (3 << 5)) ||
+ ((status & (3 << 3)) == (3 << 3))) {
+ /*
+ * Both buffers have triggered, process the one we're expecting
+ * to first
+ */
+ ibuf = list_first_entry(&pcdev->active_bufs,
+ struct mx2_buf_internal, queue);
+ mx27_camera_frame_done_emma(pcdev, ibuf->bufnum, false);
+ status &= ~(1 << (6 - ibuf->bufnum)); /* mark processed */
+ } else if ((status & (1 << 6)) || (status & (1 << 4))) {
+ mx27_camera_frame_done_emma(pcdev, 0, false);
+ } else if ((status & (1 << 5)) || (status & (1 << 3))) {
+ mx27_camera_frame_done_emma(pcdev, 1, false);
+ }
+
+ spin_unlock(&pcdev->lock);
+ writel(status, pcdev->base_emma + PRP_INTRSTATUS);
+
+ return IRQ_HANDLED;
+}
+
+static int __devinit mx27_camera_emma_init(struct platform_device *pdev)
+{
+ struct mx2_camera_dev *pcdev = platform_get_drvdata(pdev);
+ struct resource *res_emma;
+ int irq_emma;
+ int err = 0;
+
+ res_emma = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ irq_emma = platform_get_irq(pdev, 1);
+ if (!res_emma || !irq_emma) {
+ dev_err(pcdev->dev, "no EMMA resources\n");
+ goto out;
+ }
+
+ pcdev->base_emma = devm_request_and_ioremap(pcdev->dev, res_emma);
+ if (!pcdev->base_emma) {
+ err = -EADDRNOTAVAIL;
+ goto out;
+ }
+
+ err = devm_request_irq(pcdev->dev, irq_emma, mx27_camera_emma_irq, 0,
+ MX2_CAM_DRV_NAME, pcdev);
+ if (err) {
+ dev_err(pcdev->dev, "Camera EMMA interrupt register failed \n");
+ goto out;
+ }
+
+ pcdev->clk_emma_ipg = devm_clk_get(pcdev->dev, "emma-ipg");
+ if (IS_ERR(pcdev->clk_emma_ipg)) {
+ err = PTR_ERR(pcdev->clk_emma_ipg);
+ goto out;
+ }
+
+ clk_prepare_enable(pcdev->clk_emma_ipg);
+
+ pcdev->clk_emma_ahb = devm_clk_get(pcdev->dev, "emma-ahb");
+ if (IS_ERR(pcdev->clk_emma_ahb)) {
+ err = PTR_ERR(pcdev->clk_emma_ahb);
+ goto exit_clk_emma_ipg;
+ }
+
+ clk_prepare_enable(pcdev->clk_emma_ahb);
+
+ err = mx27_camera_emma_prp_reset(pcdev);
+ if (err)
+ goto exit_clk_emma_ahb;
+
+ return err;
+
+exit_clk_emma_ahb:
+ clk_disable_unprepare(pcdev->clk_emma_ahb);
+exit_clk_emma_ipg:
+ clk_disable_unprepare(pcdev->clk_emma_ipg);
+out:
+ return err;
+}
+
+static int __devinit mx2_camera_probe(struct platform_device *pdev)
+{
+ struct mx2_camera_dev *pcdev;
+ struct resource *res_csi;
+ int irq_csi;
+ int err = 0;
+
+ dev_dbg(&pdev->dev, "initialising\n");
+
+ res_csi = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ irq_csi = platform_get_irq(pdev, 0);
+ if (res_csi == NULL || irq_csi < 0) {
+ dev_err(&pdev->dev, "Missing platform resources data\n");
+ err = -ENODEV;
+ goto exit;
+ }
+
+ pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
+ if (!pcdev) {
+ dev_err(&pdev->dev, "Could not allocate pcdev\n");
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ pcdev->clk_csi = devm_clk_get(&pdev->dev, "ahb");
+ if (IS_ERR(pcdev->clk_csi)) {
+ dev_err(&pdev->dev, "Could not get csi clock\n");
+ err = PTR_ERR(pcdev->clk_csi);
+ goto exit;
+ }
+
+ pcdev->pdata = pdev->dev.platform_data;
+ if (pcdev->pdata) {
+ long rate;
+
+ pcdev->platform_flags = pcdev->pdata->flags;
+
+ rate = clk_round_rate(pcdev->clk_csi, pcdev->pdata->clk * 2);
+ if (rate <= 0) {
+ err = -ENODEV;
+ goto exit;
+ }
+ err = clk_set_rate(pcdev->clk_csi, rate);
+ if (err < 0)
+ goto exit;
+ }
+
+ INIT_LIST_HEAD(&pcdev->capture);
+ INIT_LIST_HEAD(&pcdev->active_bufs);
+ INIT_LIST_HEAD(&pcdev->discard);
+ spin_lock_init(&pcdev->lock);
+
+ pcdev->base_csi = devm_request_and_ioremap(&pdev->dev, res_csi);
+ if (!pcdev->base_csi) {
+ err = -EADDRNOTAVAIL;
+ goto exit;
+ }
+
+ pcdev->dev = &pdev->dev;
+ platform_set_drvdata(pdev, pcdev);
+
+ if (cpu_is_mx25()) {
+ err = devm_request_irq(&pdev->dev, irq_csi, mx25_camera_irq, 0,
+ MX2_CAM_DRV_NAME, pcdev);
+ if (err) {
+ dev_err(pcdev->dev, "Camera interrupt register failed \n");
+ goto exit;
+ }
+ }
+
+ if (cpu_is_mx27()) {
+ err = mx27_camera_emma_init(pdev);
+ if (err)
+ goto exit;
+ }
+
+ /*
+ * We're done with drvdata here. Clear the pointer so that
+ * v4l2 core can start using drvdata on its purpose.
+ */
+ platform_set_drvdata(pdev, NULL);
+
+ pcdev->soc_host.drv_name = MX2_CAM_DRV_NAME,
+ pcdev->soc_host.ops = &mx2_soc_camera_host_ops,
+ pcdev->soc_host.priv = pcdev;
+ pcdev->soc_host.v4l2_dev.dev = &pdev->dev;
+ pcdev->soc_host.nr = pdev->id;
+ if (cpu_is_mx25())
+ pcdev->soc_host.capabilities = SOCAM_HOST_CAP_STRIDE;
+
+ pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
+ if (IS_ERR(pcdev->alloc_ctx)) {
+ err = PTR_ERR(pcdev->alloc_ctx);
+ goto eallocctx;
+ }
+ err = soc_camera_host_register(&pcdev->soc_host);
+ if (err)
+ goto exit_free_emma;
+
+ dev_info(&pdev->dev, "MX2 Camera (CSI) driver probed, clock frequency: %ld\n",
+ clk_get_rate(pcdev->clk_csi));
+
+ return 0;
+
+exit_free_emma:
+ vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
+eallocctx:
+ if (cpu_is_mx27()) {
+ clk_disable_unprepare(pcdev->clk_emma_ipg);
+ clk_disable_unprepare(pcdev->clk_emma_ahb);
+ }
+exit:
+ return err;
+}
+
+static int __devexit mx2_camera_remove(struct platform_device *pdev)
+{
+ struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
+ struct mx2_camera_dev *pcdev = container_of(soc_host,
+ struct mx2_camera_dev, soc_host);
+
+ soc_camera_host_unregister(&pcdev->soc_host);
+
+ vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
+
+ if (cpu_is_mx27()) {
+ clk_disable_unprepare(pcdev->clk_emma_ipg);
+ clk_disable_unprepare(pcdev->clk_emma_ahb);
+ }
+
+ dev_info(&pdev->dev, "MX2 Camera driver unloaded\n");
+
+ return 0;
+}
+
+static struct platform_driver mx2_camera_driver = {
+ .driver = {
+ .name = MX2_CAM_DRV_NAME,
+ },
+ .remove = __devexit_p(mx2_camera_remove),
+};
+
+
+static int __init mx2_camera_init(void)
+{
+ return platform_driver_probe(&mx2_camera_driver, &mx2_camera_probe);
+}
+
+static void __exit mx2_camera_exit(void)
+{
+ return platform_driver_unregister(&mx2_camera_driver);
+}
+
+module_init(mx2_camera_init);
+module_exit(mx2_camera_exit);
+
+MODULE_DESCRIPTION("i.MX27/i.MX25 SoC Camera Host driver");
+MODULE_AUTHOR("Sascha Hauer <sha@pengutronix.de>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(MX2_CAM_VERSION);
--- /dev/null
- #include <mach/mx3_camera.h>
- #include <mach/dma.h>
+/*
+ * V4L2 Driver for i.MX3x camera host
+ *
+ * Copyright (C) 2008
+ * Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/videodev2.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/vmalloc.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-dev.h>
+#include <media/videobuf2-dma-contig.h>
+#include <media/soc_camera.h>
+#include <media/soc_mediabus.h>
+
+#include <mach/ipu.h>
++#include <linux/platform_data/camera-mx3.h>
++#include <linux/platform_data/dma-imx.h>
+
+#define MX3_CAM_DRV_NAME "mx3-camera"
+
+/* CMOS Sensor Interface Registers */
+#define CSI_REG_START 0x60
+
+#define CSI_SENS_CONF (0x60 - CSI_REG_START)
+#define CSI_SENS_FRM_SIZE (0x64 - CSI_REG_START)
+#define CSI_ACT_FRM_SIZE (0x68 - CSI_REG_START)
+#define CSI_OUT_FRM_CTRL (0x6C - CSI_REG_START)
+#define CSI_TST_CTRL (0x70 - CSI_REG_START)
+#define CSI_CCIR_CODE_1 (0x74 - CSI_REG_START)
+#define CSI_CCIR_CODE_2 (0x78 - CSI_REG_START)
+#define CSI_CCIR_CODE_3 (0x7C - CSI_REG_START)
+#define CSI_FLASH_STROBE_1 (0x80 - CSI_REG_START)
+#define CSI_FLASH_STROBE_2 (0x84 - CSI_REG_START)
+
+#define CSI_SENS_CONF_VSYNC_POL_SHIFT 0
+#define CSI_SENS_CONF_HSYNC_POL_SHIFT 1
+#define CSI_SENS_CONF_DATA_POL_SHIFT 2
+#define CSI_SENS_CONF_PIX_CLK_POL_SHIFT 3
+#define CSI_SENS_CONF_SENS_PRTCL_SHIFT 4
+#define CSI_SENS_CONF_SENS_CLKSRC_SHIFT 7
+#define CSI_SENS_CONF_DATA_FMT_SHIFT 8
+#define CSI_SENS_CONF_DATA_WIDTH_SHIFT 10
+#define CSI_SENS_CONF_EXT_VSYNC_SHIFT 15
+#define CSI_SENS_CONF_DIVRATIO_SHIFT 16
+
+#define CSI_SENS_CONF_DATA_FMT_RGB_YUV444 (0UL << CSI_SENS_CONF_DATA_FMT_SHIFT)
+#define CSI_SENS_CONF_DATA_FMT_YUV422 (2UL << CSI_SENS_CONF_DATA_FMT_SHIFT)
+#define CSI_SENS_CONF_DATA_FMT_BAYER (3UL << CSI_SENS_CONF_DATA_FMT_SHIFT)
+
+#define MAX_VIDEO_MEM 16
+
+struct mx3_camera_buffer {
+ /* common v4l buffer stuff -- must be first */
+ struct vb2_buffer vb;
+ struct list_head queue;
+
+ /* One descriptot per scatterlist (per frame) */
+ struct dma_async_tx_descriptor *txd;
+
+ /* We have to "build" a scatterlist ourselves - one element per frame */
+ struct scatterlist sg;
+};
+
+/**
+ * struct mx3_camera_dev - i.MX3x camera (CSI) object
+ * @dev: camera device, to which the coherent buffer is attached
+ * @icd: currently attached camera sensor
+ * @clk: pointer to clock
+ * @base: remapped register base address
+ * @pdata: platform data
+ * @platform_flags: platform flags
+ * @mclk: master clock frequency in Hz
+ * @capture: list of capture videobuffers
+ * @lock: protects video buffer lists
+ * @active: active video buffer
+ * @idmac_channel: array of pointers to IPU DMAC DMA channels
+ * @soc_host: embedded soc_host object
+ */
+struct mx3_camera_dev {
+ /*
+ * i.MX3x is only supposed to handle one camera on its Camera Sensor
+ * Interface. If anyone ever builds hardware to enable more than one
+ * camera _simultaneously_, they will have to modify this driver too
+ */
+ struct soc_camera_device *icd;
+ struct clk *clk;
+
+ void __iomem *base;
+
+ struct mx3_camera_pdata *pdata;
+
+ unsigned long platform_flags;
+ unsigned long mclk;
+ u16 width_flags; /* max 15 bits */
+
+ struct list_head capture;
+ spinlock_t lock; /* Protects video buffer lists */
+ struct mx3_camera_buffer *active;
+ size_t buf_total;
+ struct vb2_alloc_ctx *alloc_ctx;
+ enum v4l2_field field;
+ int sequence;
+
+ /* IDMAC / dmaengine interface */
+ struct idmac_channel *idmac_channel[1]; /* We need one channel */
+
+ struct soc_camera_host soc_host;
+};
+
+struct dma_chan_request {
+ struct mx3_camera_dev *mx3_cam;
+ enum ipu_channel id;
+};
+
+static u32 csi_reg_read(struct mx3_camera_dev *mx3, off_t reg)
+{
+ return __raw_readl(mx3->base + reg);
+}
+
+static void csi_reg_write(struct mx3_camera_dev *mx3, u32 value, off_t reg)
+{
+ __raw_writel(value, mx3->base + reg);
+}
+
+static struct mx3_camera_buffer *to_mx3_vb(struct vb2_buffer *vb)
+{
+ return container_of(vb, struct mx3_camera_buffer, vb);
+}
+
+/* Called from the IPU IDMAC ISR */
+static void mx3_cam_dma_done(void *arg)
+{
+ struct idmac_tx_desc *desc = to_tx_desc(arg);
+ struct dma_chan *chan = desc->txd.chan;
+ struct idmac_channel *ichannel = to_idmac_chan(chan);
+ struct mx3_camera_dev *mx3_cam = ichannel->client;
+
+ dev_dbg(chan->device->dev, "callback cookie %d, active DMA 0x%08x\n",
+ desc->txd.cookie, mx3_cam->active ? sg_dma_address(&mx3_cam->active->sg) : 0);
+
+ spin_lock(&mx3_cam->lock);
+ if (mx3_cam->active) {
+ struct vb2_buffer *vb = &mx3_cam->active->vb;
+ struct mx3_camera_buffer *buf = to_mx3_vb(vb);
+
+ list_del_init(&buf->queue);
+ do_gettimeofday(&vb->v4l2_buf.timestamp);
+ vb->v4l2_buf.field = mx3_cam->field;
+ vb->v4l2_buf.sequence = mx3_cam->sequence++;
+ vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
+ }
+
+ if (list_empty(&mx3_cam->capture)) {
+ mx3_cam->active = NULL;
+ spin_unlock(&mx3_cam->lock);
+
+ /*
+ * stop capture - without further buffers IPU_CHA_BUF0_RDY will
+ * not get updated
+ */
+ return;
+ }
+
+ mx3_cam->active = list_entry(mx3_cam->capture.next,
+ struct mx3_camera_buffer, queue);
+ spin_unlock(&mx3_cam->lock);
+}
+
+/*
+ * Videobuf operations
+ */
+
+/*
+ * Calculate the __buffer__ (not data) size and number of buffers.
+ */
+static int mx3_videobuf_setup(struct vb2_queue *vq,
+ const struct v4l2_format *fmt,
+ unsigned int *count, unsigned int *num_planes,
+ unsigned int sizes[], void *alloc_ctxs[])
+{
+ struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx3_camera_dev *mx3_cam = ici->priv;
+
+ if (!mx3_cam->idmac_channel[0])
+ return -EINVAL;
+
+ if (fmt) {
+ const struct soc_camera_format_xlate *xlate = soc_camera_xlate_by_fourcc(icd,
+ fmt->fmt.pix.pixelformat);
+ unsigned int bytes_per_line;
+ int ret;
+
+ if (!xlate)
+ return -EINVAL;
+
+ ret = soc_mbus_bytes_per_line(fmt->fmt.pix.width,
+ xlate->host_fmt);
+ if (ret < 0)
+ return ret;
+
+ bytes_per_line = max_t(u32, fmt->fmt.pix.bytesperline, ret);
+
+ ret = soc_mbus_image_size(xlate->host_fmt, bytes_per_line,
+ fmt->fmt.pix.height);
+ if (ret < 0)
+ return ret;
+
+ sizes[0] = max_t(u32, fmt->fmt.pix.sizeimage, ret);
+ } else {
+ /* Called from VIDIOC_REQBUFS or in compatibility mode */
+ sizes[0] = icd->sizeimage;
+ }
+
+ alloc_ctxs[0] = mx3_cam->alloc_ctx;
+
+ if (!vq->num_buffers)
+ mx3_cam->sequence = 0;
+
+ if (!*count)
+ *count = 2;
+
+ /* If *num_planes != 0, we have already verified *count. */
+ if (!*num_planes &&
+ sizes[0] * *count + mx3_cam->buf_total > MAX_VIDEO_MEM * 1024 * 1024)
+ *count = (MAX_VIDEO_MEM * 1024 * 1024 - mx3_cam->buf_total) /
+ sizes[0];
+
+ *num_planes = 1;
+
+ return 0;
+}
+
+static enum pixel_fmt fourcc_to_ipu_pix(__u32 fourcc)
+{
+ /* Add more formats as need arises and test possibilities appear... */
+ switch (fourcc) {
+ case V4L2_PIX_FMT_RGB24:
+ return IPU_PIX_FMT_RGB24;
+ case V4L2_PIX_FMT_UYVY:
+ case V4L2_PIX_FMT_RGB565:
+ default:
+ return IPU_PIX_FMT_GENERIC;
+ }
+}
+
+static void mx3_videobuf_queue(struct vb2_buffer *vb)
+{
+ struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx3_camera_dev *mx3_cam = ici->priv;
+ struct mx3_camera_buffer *buf = to_mx3_vb(vb);
+ struct scatterlist *sg = &buf->sg;
+ struct dma_async_tx_descriptor *txd;
+ struct idmac_channel *ichan = mx3_cam->idmac_channel[0];
+ struct idmac_video_param *video = &ichan->params.video;
+ const struct soc_mbus_pixelfmt *host_fmt = icd->current_fmt->host_fmt;
+ unsigned long flags;
+ dma_cookie_t cookie;
+ size_t new_size;
+
+ new_size = icd->sizeimage;
+
+ if (vb2_plane_size(vb, 0) < new_size) {
+ dev_err(icd->parent, "Buffer #%d too small (%lu < %zu)\n",
+ vb->v4l2_buf.index, vb2_plane_size(vb, 0), new_size);
+ goto error;
+ }
+
+ if (!buf->txd) {
+ sg_dma_address(sg) = vb2_dma_contig_plane_dma_addr(vb, 0);
+ sg_dma_len(sg) = new_size;
+
+ txd = dmaengine_prep_slave_sg(
+ &ichan->dma_chan, sg, 1, DMA_DEV_TO_MEM,
+ DMA_PREP_INTERRUPT);
+ if (!txd)
+ goto error;
+
+ txd->callback_param = txd;
+ txd->callback = mx3_cam_dma_done;
+
+ buf->txd = txd;
+ } else {
+ txd = buf->txd;
+ }
+
+ vb2_set_plane_payload(vb, 0, new_size);
+
+ /* This is the configuration of one sg-element */
+ video->out_pixel_fmt = fourcc_to_ipu_pix(host_fmt->fourcc);
+
+ if (video->out_pixel_fmt == IPU_PIX_FMT_GENERIC) {
+ /*
+ * If the IPU DMA channel is configured to transfer generic
+ * 8-bit data, we have to set up the geometry parameters
+ * correctly, according to the current pixel format. The DMA
+ * horizontal parameters in this case are expressed in bytes,
+ * not in pixels.
+ */
+ video->out_width = icd->bytesperline;
+ video->out_height = icd->user_height;
+ video->out_stride = icd->bytesperline;
+ } else {
+ /*
+ * For IPU known formats the pixel unit will be managed
+ * successfully by the IPU code
+ */
+ video->out_width = icd->user_width;
+ video->out_height = icd->user_height;
+ video->out_stride = icd->user_width;
+ }
+
+#ifdef DEBUG
+ /* helps to see what DMA actually has written */
+ if (vb2_plane_vaddr(vb, 0))
+ memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0));
+#endif
+
+ spin_lock_irqsave(&mx3_cam->lock, flags);
+ list_add_tail(&buf->queue, &mx3_cam->capture);
+
+ if (!mx3_cam->active)
+ mx3_cam->active = buf;
+
+ spin_unlock_irq(&mx3_cam->lock);
+
+ cookie = txd->tx_submit(txd);
+ dev_dbg(icd->parent, "Submitted cookie %d DMA 0x%08x\n",
+ cookie, sg_dma_address(&buf->sg));
+
+ if (cookie >= 0)
+ return;
+
+ spin_lock_irq(&mx3_cam->lock);
+
+ /* Submit error */
+ list_del_init(&buf->queue);
+
+ if (mx3_cam->active == buf)
+ mx3_cam->active = NULL;
+
+ spin_unlock_irqrestore(&mx3_cam->lock, flags);
+error:
+ vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
+}
+
+static void mx3_videobuf_release(struct vb2_buffer *vb)
+{
+ struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx3_camera_dev *mx3_cam = ici->priv;
+ struct mx3_camera_buffer *buf = to_mx3_vb(vb);
+ struct dma_async_tx_descriptor *txd = buf->txd;
+ unsigned long flags;
+
+ dev_dbg(icd->parent,
+ "Release%s DMA 0x%08x, queue %sempty\n",
+ mx3_cam->active == buf ? " active" : "", sg_dma_address(&buf->sg),
+ list_empty(&buf->queue) ? "" : "not ");
+
+ spin_lock_irqsave(&mx3_cam->lock, flags);
+
+ if (mx3_cam->active == buf)
+ mx3_cam->active = NULL;
+
+ /* Doesn't hurt also if the list is empty */
+ list_del_init(&buf->queue);
+
+ if (txd) {
+ buf->txd = NULL;
+ if (mx3_cam->idmac_channel[0])
+ async_tx_ack(txd);
+ }
+
+ spin_unlock_irqrestore(&mx3_cam->lock, flags);
+
+ mx3_cam->buf_total -= vb2_plane_size(vb, 0);
+}
+
+static int mx3_videobuf_init(struct vb2_buffer *vb)
+{
+ struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx3_camera_dev *mx3_cam = ici->priv;
+ struct mx3_camera_buffer *buf = to_mx3_vb(vb);
+
+ if (!buf->txd) {
+ /* This is for locking debugging only */
+ INIT_LIST_HEAD(&buf->queue);
+ sg_init_table(&buf->sg, 1);
+
+ mx3_cam->buf_total += vb2_plane_size(vb, 0);
+ }
+
+ return 0;
+}
+
+static int mx3_stop_streaming(struct vb2_queue *q)
+{
+ struct soc_camera_device *icd = soc_camera_from_vb2q(q);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx3_camera_dev *mx3_cam = ici->priv;
+ struct idmac_channel *ichan = mx3_cam->idmac_channel[0];
+ struct mx3_camera_buffer *buf, *tmp;
+ unsigned long flags;
+
+ if (ichan) {
+ struct dma_chan *chan = &ichan->dma_chan;
+ chan->device->device_control(chan, DMA_PAUSE, 0);
+ }
+
+ spin_lock_irqsave(&mx3_cam->lock, flags);
+
+ mx3_cam->active = NULL;
+
+ list_for_each_entry_safe(buf, tmp, &mx3_cam->capture, queue) {
+ list_del_init(&buf->queue);
+ vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
+ }
+
+ spin_unlock_irqrestore(&mx3_cam->lock, flags);
+
+ return 0;
+}
+
+static struct vb2_ops mx3_videobuf_ops = {
+ .queue_setup = mx3_videobuf_setup,
+ .buf_queue = mx3_videobuf_queue,
+ .buf_cleanup = mx3_videobuf_release,
+ .buf_init = mx3_videobuf_init,
+ .wait_prepare = soc_camera_unlock,
+ .wait_finish = soc_camera_lock,
+ .stop_streaming = mx3_stop_streaming,
+};
+
+static int mx3_camera_init_videobuf(struct vb2_queue *q,
+ struct soc_camera_device *icd)
+{
+ q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ q->io_modes = VB2_MMAP | VB2_USERPTR;
+ q->drv_priv = icd;
+ q->ops = &mx3_videobuf_ops;
+ q->mem_ops = &vb2_dma_contig_memops;
+ q->buf_struct_size = sizeof(struct mx3_camera_buffer);
+
+ return vb2_queue_init(q);
+}
+
+/* First part of ipu_csi_init_interface() */
+static void mx3_camera_activate(struct mx3_camera_dev *mx3_cam,
+ struct soc_camera_device *icd)
+{
+ u32 conf;
+ long rate;
+
+ /* Set default size: ipu_csi_set_window_size() */
+ csi_reg_write(mx3_cam, (640 - 1) | ((480 - 1) << 16), CSI_ACT_FRM_SIZE);
+ /* ...and position to 0:0: ipu_csi_set_window_pos() */
+ conf = csi_reg_read(mx3_cam, CSI_OUT_FRM_CTRL) & 0xffff0000;
+ csi_reg_write(mx3_cam, conf, CSI_OUT_FRM_CTRL);
+
+ /* We use only gated clock synchronisation mode so far */
+ conf = 0 << CSI_SENS_CONF_SENS_PRTCL_SHIFT;
+
+ /* Set generic data, platform-biggest bus-width */
+ conf |= CSI_SENS_CONF_DATA_FMT_BAYER;
+
+ if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_15)
+ conf |= 3 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
+ else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_10)
+ conf |= 2 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
+ else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_8)
+ conf |= 1 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
+ else/* if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_4)*/
+ conf |= 0 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
+
+ if (mx3_cam->platform_flags & MX3_CAMERA_CLK_SRC)
+ conf |= 1 << CSI_SENS_CONF_SENS_CLKSRC_SHIFT;
+ if (mx3_cam->platform_flags & MX3_CAMERA_EXT_VSYNC)
+ conf |= 1 << CSI_SENS_CONF_EXT_VSYNC_SHIFT;
+ if (mx3_cam->platform_flags & MX3_CAMERA_DP)
+ conf |= 1 << CSI_SENS_CONF_DATA_POL_SHIFT;
+ if (mx3_cam->platform_flags & MX3_CAMERA_PCP)
+ conf |= 1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT;
+ if (mx3_cam->platform_flags & MX3_CAMERA_HSP)
+ conf |= 1 << CSI_SENS_CONF_HSYNC_POL_SHIFT;
+ if (mx3_cam->platform_flags & MX3_CAMERA_VSP)
+ conf |= 1 << CSI_SENS_CONF_VSYNC_POL_SHIFT;
+
+ /* ipu_csi_init_interface() */
+ csi_reg_write(mx3_cam, conf, CSI_SENS_CONF);
+
+ clk_prepare_enable(mx3_cam->clk);
+ rate = clk_round_rate(mx3_cam->clk, mx3_cam->mclk);
+ dev_dbg(icd->parent, "Set SENS_CONF to %x, rate %ld\n", conf, rate);
+ if (rate)
+ clk_set_rate(mx3_cam->clk, rate);
+}
+
+/* Called with .video_lock held */
+static int mx3_camera_add_device(struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx3_camera_dev *mx3_cam = ici->priv;
+
+ if (mx3_cam->icd)
+ return -EBUSY;
+
+ mx3_camera_activate(mx3_cam, icd);
+
+ mx3_cam->buf_total = 0;
+ mx3_cam->icd = icd;
+
+ dev_info(icd->parent, "MX3 Camera driver attached to camera %d\n",
+ icd->devnum);
+
+ return 0;
+}
+
+/* Called with .video_lock held */
+static void mx3_camera_remove_device(struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx3_camera_dev *mx3_cam = ici->priv;
+ struct idmac_channel **ichan = &mx3_cam->idmac_channel[0];
+
+ BUG_ON(icd != mx3_cam->icd);
+
+ if (*ichan) {
+ dma_release_channel(&(*ichan)->dma_chan);
+ *ichan = NULL;
+ }
+
+ clk_disable_unprepare(mx3_cam->clk);
+
+ mx3_cam->icd = NULL;
+
+ dev_info(icd->parent, "MX3 Camera driver detached from camera %d\n",
+ icd->devnum);
+}
+
+static int test_platform_param(struct mx3_camera_dev *mx3_cam,
+ unsigned char buswidth, unsigned long *flags)
+{
+ /*
+ * If requested data width is supported by the platform, use it or any
+ * possible lower value - i.MX31 is smart enough to shift bits
+ */
+ if (buswidth > fls(mx3_cam->width_flags))
+ return -EINVAL;
+
+ /*
+ * Platform specified synchronization and pixel clock polarities are
+ * only a recommendation and are only used during probing. MX3x
+ * camera interface only works in master mode, i.e., uses HSYNC and
+ * VSYNC signals from the sensor
+ */
+ *flags = V4L2_MBUS_MASTER |
+ V4L2_MBUS_HSYNC_ACTIVE_HIGH |
+ V4L2_MBUS_HSYNC_ACTIVE_LOW |
+ V4L2_MBUS_VSYNC_ACTIVE_HIGH |
+ V4L2_MBUS_VSYNC_ACTIVE_LOW |
+ V4L2_MBUS_PCLK_SAMPLE_RISING |
+ V4L2_MBUS_PCLK_SAMPLE_FALLING |
+ V4L2_MBUS_DATA_ACTIVE_HIGH |
+ V4L2_MBUS_DATA_ACTIVE_LOW;
+
+ return 0;
+}
+
+static int mx3_camera_try_bus_param(struct soc_camera_device *icd,
+ const unsigned int depth)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx3_camera_dev *mx3_cam = ici->priv;
+ struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
+ unsigned long bus_flags, common_flags;
+ int ret = test_platform_param(mx3_cam, depth, &bus_flags);
+
+ dev_dbg(icd->parent, "request bus width %d bit: %d\n", depth, ret);
+
+ if (ret < 0)
+ return ret;
+
+ ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
+ if (!ret) {
+ common_flags = soc_mbus_config_compatible(&cfg,
+ bus_flags);
+ if (!common_flags) {
+ dev_warn(icd->parent,
+ "Flags incompatible: camera 0x%x, host 0x%lx\n",
+ cfg.flags, bus_flags);
+ return -EINVAL;
+ }
+ } else if (ret != -ENOIOCTLCMD) {
+ return ret;
+ }
+
+ return 0;
+}
+
+static bool chan_filter(struct dma_chan *chan, void *arg)
+{
+ struct dma_chan_request *rq = arg;
+ struct mx3_camera_pdata *pdata;
+
+ if (!imx_dma_is_ipu(chan))
+ return false;
+
+ if (!rq)
+ return false;
+
+ pdata = rq->mx3_cam->soc_host.v4l2_dev.dev->platform_data;
+
+ return rq->id == chan->chan_id &&
+ pdata->dma_dev == chan->device->dev;
+}
+
+static const struct soc_mbus_pixelfmt mx3_camera_formats[] = {
+ {
+ .fourcc = V4L2_PIX_FMT_SBGGR8,
+ .name = "Bayer BGGR (sRGB) 8 bit",
+ .bits_per_sample = 8,
+ .packing = SOC_MBUS_PACKING_NONE,
+ .order = SOC_MBUS_ORDER_LE,
+ .layout = SOC_MBUS_LAYOUT_PACKED,
+ }, {
+ .fourcc = V4L2_PIX_FMT_GREY,
+ .name = "Monochrome 8 bit",
+ .bits_per_sample = 8,
+ .packing = SOC_MBUS_PACKING_NONE,
+ .order = SOC_MBUS_ORDER_LE,
+ .layout = SOC_MBUS_LAYOUT_PACKED,
+ },
+};
+
+/* This will be corrected as we get more formats */
+static bool mx3_camera_packing_supported(const struct soc_mbus_pixelfmt *fmt)
+{
+ return fmt->packing == SOC_MBUS_PACKING_NONE ||
+ (fmt->bits_per_sample == 8 &&
+ fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
+ (fmt->bits_per_sample > 8 &&
+ fmt->packing == SOC_MBUS_PACKING_EXTEND16);
+}
+
+static int mx3_camera_get_formats(struct soc_camera_device *icd, unsigned int idx,
+ struct soc_camera_format_xlate *xlate)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ struct device *dev = icd->parent;
+ int formats = 0, ret;
+ enum v4l2_mbus_pixelcode code;
+ const struct soc_mbus_pixelfmt *fmt;
+
+ ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
+ if (ret < 0)
+ /* No more formats */
+ return 0;
+
+ fmt = soc_mbus_get_fmtdesc(code);
+ if (!fmt) {
+ dev_warn(icd->parent,
+ "Unsupported format code #%u: %d\n", idx, code);
+ return 0;
+ }
+
+ /* This also checks support for the requested bits-per-sample */
+ ret = mx3_camera_try_bus_param(icd, fmt->bits_per_sample);
+ if (ret < 0)
+ return 0;
+
+ switch (code) {
+ case V4L2_MBUS_FMT_SBGGR10_1X10:
+ formats++;
+ if (xlate) {
+ xlate->host_fmt = &mx3_camera_formats[0];
+ xlate->code = code;
+ xlate++;
+ dev_dbg(dev, "Providing format %s using code %d\n",
+ mx3_camera_formats[0].name, code);
+ }
+ break;
+ case V4L2_MBUS_FMT_Y10_1X10:
+ formats++;
+ if (xlate) {
+ xlate->host_fmt = &mx3_camera_formats[1];
+ xlate->code = code;
+ xlate++;
+ dev_dbg(dev, "Providing format %s using code %d\n",
+ mx3_camera_formats[1].name, code);
+ }
+ break;
+ default:
+ if (!mx3_camera_packing_supported(fmt))
+ return 0;
+ }
+
+ /* Generic pass-through */
+ formats++;
+ if (xlate) {
+ xlate->host_fmt = fmt;
+ xlate->code = code;
+ dev_dbg(dev, "Providing format %c%c%c%c in pass-through mode\n",
+ (fmt->fourcc >> (0*8)) & 0xFF,
+ (fmt->fourcc >> (1*8)) & 0xFF,
+ (fmt->fourcc >> (2*8)) & 0xFF,
+ (fmt->fourcc >> (3*8)) & 0xFF);
+ xlate++;
+ }
+
+ return formats;
+}
+
+static void configure_geometry(struct mx3_camera_dev *mx3_cam,
+ unsigned int width, unsigned int height,
+ const struct soc_mbus_pixelfmt *fmt)
+{
+ u32 ctrl, width_field, height_field;
+
+ if (fourcc_to_ipu_pix(fmt->fourcc) == IPU_PIX_FMT_GENERIC) {
+ /*
+ * As the CSI will be configured to output BAYER, here
+ * the width parameter count the number of samples to
+ * capture to complete the whole image width.
+ */
+ unsigned int num, den;
+ int ret = soc_mbus_samples_per_pixel(fmt, &num, &den);
+ BUG_ON(ret < 0);
+ width = width * num / den;
+ }
+
+ /* Setup frame size - this cannot be changed on-the-fly... */
+ width_field = width - 1;
+ height_field = height - 1;
+ csi_reg_write(mx3_cam, width_field | (height_field << 16), CSI_SENS_FRM_SIZE);
+
+ csi_reg_write(mx3_cam, width_field << 16, CSI_FLASH_STROBE_1);
+ csi_reg_write(mx3_cam, (height_field << 16) | 0x22, CSI_FLASH_STROBE_2);
+
+ csi_reg_write(mx3_cam, width_field | (height_field << 16), CSI_ACT_FRM_SIZE);
+
+ /* ...and position */
+ ctrl = csi_reg_read(mx3_cam, CSI_OUT_FRM_CTRL) & 0xffff0000;
+ /* Sensor does the cropping */
+ csi_reg_write(mx3_cam, ctrl | 0 | (0 << 8), CSI_OUT_FRM_CTRL);
+}
+
+static int acquire_dma_channel(struct mx3_camera_dev *mx3_cam)
+{
+ dma_cap_mask_t mask;
+ struct dma_chan *chan;
+ struct idmac_channel **ichan = &mx3_cam->idmac_channel[0];
+ /* We have to use IDMAC_IC_7 for Bayer / generic data */
+ struct dma_chan_request rq = {.mx3_cam = mx3_cam,
+ .id = IDMAC_IC_7};
+
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_SLAVE, mask);
+ dma_cap_set(DMA_PRIVATE, mask);
+ chan = dma_request_channel(mask, chan_filter, &rq);
+ if (!chan)
+ return -EBUSY;
+
+ *ichan = to_idmac_chan(chan);
+ (*ichan)->client = mx3_cam;
+
+ return 0;
+}
+
+/*
+ * FIXME: learn to use stride != width, then we can keep stride properly aligned
+ * and support arbitrary (even) widths.
+ */
+static inline void stride_align(__u32 *width)
+{
+ if (ALIGN(*width, 8) < 4096)
+ *width = ALIGN(*width, 8);
+ else
+ *width = *width & ~7;
+}
+
+/*
+ * As long as we don't implement host-side cropping and scaling, we can use
+ * default g_crop and cropcap from soc_camera.c
+ */
+static int mx3_camera_set_crop(struct soc_camera_device *icd,
+ struct v4l2_crop *a)
+{
+ struct v4l2_rect *rect = &a->c;
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx3_camera_dev *mx3_cam = ici->priv;
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ struct v4l2_mbus_framefmt mf;
+ int ret;
+
+ soc_camera_limit_side(&rect->left, &rect->width, 0, 2, 4096);
+ soc_camera_limit_side(&rect->top, &rect->height, 0, 2, 4096);
+
+ ret = v4l2_subdev_call(sd, video, s_crop, a);
+ if (ret < 0)
+ return ret;
+
+ /* The capture device might have changed its output sizes */
+ ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
+ if (ret < 0)
+ return ret;
+
+ if (mf.code != icd->current_fmt->code)
+ return -EINVAL;
+
+ if (mf.width & 7) {
+ /* Ouch! We can only handle 8-byte aligned width... */
+ stride_align(&mf.width);
+ ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (mf.width != icd->user_width || mf.height != icd->user_height)
+ configure_geometry(mx3_cam, mf.width, mf.height,
+ icd->current_fmt->host_fmt);
+
+ dev_dbg(icd->parent, "Sensor cropped %dx%d\n",
+ mf.width, mf.height);
+
+ icd->user_width = mf.width;
+ icd->user_height = mf.height;
+
+ return ret;
+}
+
+static int mx3_camera_set_fmt(struct soc_camera_device *icd,
+ struct v4l2_format *f)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx3_camera_dev *mx3_cam = ici->priv;
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ const struct soc_camera_format_xlate *xlate;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct v4l2_mbus_framefmt mf;
+ int ret;
+
+ xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
+ if (!xlate) {
+ dev_warn(icd->parent, "Format %x not found\n",
+ pix->pixelformat);
+ return -EINVAL;
+ }
+
+ stride_align(&pix->width);
+ dev_dbg(icd->parent, "Set format %dx%d\n", pix->width, pix->height);
+
+ /*
+ * Might have to perform a complete interface initialisation like in
+ * ipu_csi_init_interface() in mxc_v4l2_s_param(). Also consider
+ * mxc_v4l2_s_fmt()
+ */
+
+ configure_geometry(mx3_cam, pix->width, pix->height, xlate->host_fmt);
+
+ mf.width = pix->width;
+ mf.height = pix->height;
+ mf.field = pix->field;
+ mf.colorspace = pix->colorspace;
+ mf.code = xlate->code;
+
+ ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf);
+ if (ret < 0)
+ return ret;
+
+ if (mf.code != xlate->code)
+ return -EINVAL;
+
+ if (!mx3_cam->idmac_channel[0]) {
+ ret = acquire_dma_channel(mx3_cam);
+ if (ret < 0)
+ return ret;
+ }
+
+ pix->width = mf.width;
+ pix->height = mf.height;
+ pix->field = mf.field;
+ mx3_cam->field = mf.field;
+ pix->colorspace = mf.colorspace;
+ icd->current_fmt = xlate;
+
+ dev_dbg(icd->parent, "Sensor set %dx%d\n", pix->width, pix->height);
+
+ return ret;
+}
+
+static int mx3_camera_try_fmt(struct soc_camera_device *icd,
+ struct v4l2_format *f)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ const struct soc_camera_format_xlate *xlate;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct v4l2_mbus_framefmt mf;
+ __u32 pixfmt = pix->pixelformat;
+ int ret;
+
+ xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
+ if (pixfmt && !xlate) {
+ dev_warn(icd->parent, "Format %x not found\n", pixfmt);
+ return -EINVAL;
+ }
+
+ /* limit to MX3 hardware capabilities */
+ if (pix->height > 4096)
+ pix->height = 4096;
+ if (pix->width > 4096)
+ pix->width = 4096;
+
+ /* limit to sensor capabilities */
+ mf.width = pix->width;
+ mf.height = pix->height;
+ mf.field = pix->field;
+ mf.colorspace = pix->colorspace;
+ mf.code = xlate->code;
+
+ ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf);
+ if (ret < 0)
+ return ret;
+
+ pix->width = mf.width;
+ pix->height = mf.height;
+ pix->colorspace = mf.colorspace;
+
+ switch (mf.field) {
+ case V4L2_FIELD_ANY:
+ pix->field = V4L2_FIELD_NONE;
+ break;
+ case V4L2_FIELD_NONE:
+ break;
+ default:
+ dev_err(icd->parent, "Field type %d unsupported.\n",
+ mf.field);
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int mx3_camera_reqbufs(struct soc_camera_device *icd,
+ struct v4l2_requestbuffers *p)
+{
+ return 0;
+}
+
+static unsigned int mx3_camera_poll(struct file *file, poll_table *pt)
+{
+ struct soc_camera_device *icd = file->private_data;
+
+ return vb2_poll(&icd->vb2_vidq, file, pt);
+}
+
+static int mx3_camera_querycap(struct soc_camera_host *ici,
+ struct v4l2_capability *cap)
+{
+ /* cap->name is set by the firendly caller:-> */
+ strlcpy(cap->card, "i.MX3x Camera", sizeof(cap->card));
+ cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
+
+ return 0;
+}
+
+static int mx3_camera_set_bus_param(struct soc_camera_device *icd)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mx3_camera_dev *mx3_cam = ici->priv;
+ struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
+ u32 pixfmt = icd->current_fmt->host_fmt->fourcc;
+ unsigned long bus_flags, common_flags;
+ u32 dw, sens_conf;
+ const struct soc_mbus_pixelfmt *fmt;
+ int buswidth;
+ int ret;
+ const struct soc_camera_format_xlate *xlate;
+ struct device *dev = icd->parent;
+
+ fmt = soc_mbus_get_fmtdesc(icd->current_fmt->code);
+ if (!fmt)
+ return -EINVAL;
+
+ xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
+ if (!xlate) {
+ dev_warn(dev, "Format %x not found\n", pixfmt);
+ return -EINVAL;
+ }
+
+ buswidth = fmt->bits_per_sample;
+ ret = test_platform_param(mx3_cam, buswidth, &bus_flags);
+
+ dev_dbg(dev, "requested bus width %d bit: %d\n", buswidth, ret);
+
+ if (ret < 0)
+ return ret;
+
+ ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
+ if (!ret) {
+ common_flags = soc_mbus_config_compatible(&cfg,
+ bus_flags);
+ if (!common_flags) {
+ dev_warn(icd->parent,
+ "Flags incompatible: camera 0x%x, host 0x%lx\n",
+ cfg.flags, bus_flags);
+ return -EINVAL;
+ }
+ } else if (ret != -ENOIOCTLCMD) {
+ return ret;
+ } else {
+ common_flags = bus_flags;
+ }
+
+ dev_dbg(dev, "Flags cam: 0x%x host: 0x%lx common: 0x%lx\n",
+ cfg.flags, bus_flags, common_flags);
+
+ /* Make choices, based on platform preferences */
+ if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
+ (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
+ if (mx3_cam->platform_flags & MX3_CAMERA_HSP)
+ common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
+ else
+ common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
+ }
+
+ if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
+ (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
+ if (mx3_cam->platform_flags & MX3_CAMERA_VSP)
+ common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
+ else
+ common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
+ }
+
+ if ((common_flags & V4L2_MBUS_DATA_ACTIVE_HIGH) &&
+ (common_flags & V4L2_MBUS_DATA_ACTIVE_LOW)) {
+ if (mx3_cam->platform_flags & MX3_CAMERA_DP)
+ common_flags &= ~V4L2_MBUS_DATA_ACTIVE_HIGH;
+ else
+ common_flags &= ~V4L2_MBUS_DATA_ACTIVE_LOW;
+ }
+
+ if ((common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) &&
+ (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)) {
+ if (mx3_cam->platform_flags & MX3_CAMERA_PCP)
+ common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_RISING;
+ else
+ common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_FALLING;
+ }
+
+ cfg.flags = common_flags;
+ ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
+ if (ret < 0 && ret != -ENOIOCTLCMD) {
+ dev_dbg(dev, "camera s_mbus_config(0x%lx) returned %d\n",
+ common_flags, ret);
+ return ret;
+ }
+
+ /*
+ * So far only gated clock mode is supported. Add a line
+ * (3 << CSI_SENS_CONF_SENS_PRTCL_SHIFT) |
+ * below and select the required mode when supporting other
+ * synchronisation protocols.
+ */
+ sens_conf = csi_reg_read(mx3_cam, CSI_SENS_CONF) &
+ ~((1 << CSI_SENS_CONF_VSYNC_POL_SHIFT) |
+ (1 << CSI_SENS_CONF_HSYNC_POL_SHIFT) |
+ (1 << CSI_SENS_CONF_DATA_POL_SHIFT) |
+ (1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT) |
+ (3 << CSI_SENS_CONF_DATA_FMT_SHIFT) |
+ (3 << CSI_SENS_CONF_DATA_WIDTH_SHIFT));
+
+ /* TODO: Support RGB and YUV formats */
+
+ /* This has been set in mx3_camera_activate(), but we clear it above */
+ sens_conf |= CSI_SENS_CONF_DATA_FMT_BAYER;
+
+ if (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
+ sens_conf |= 1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT;
+ if (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
+ sens_conf |= 1 << CSI_SENS_CONF_HSYNC_POL_SHIFT;
+ if (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
+ sens_conf |= 1 << CSI_SENS_CONF_VSYNC_POL_SHIFT;
+ if (common_flags & V4L2_MBUS_DATA_ACTIVE_LOW)
+ sens_conf |= 1 << CSI_SENS_CONF_DATA_POL_SHIFT;
+
+ /* Just do what we're asked to do */
+ switch (xlate->host_fmt->bits_per_sample) {
+ case 4:
+ dw = 0 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
+ break;
+ case 8:
+ dw = 1 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
+ break;
+ case 10:
+ dw = 2 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
+ break;
+ default:
+ /*
+ * Actually it can only be 15 now, default is just to silence
+ * compiler warnings
+ */
+ case 15:
+ dw = 3 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
+ }
+
+ csi_reg_write(mx3_cam, sens_conf | dw, CSI_SENS_CONF);
+
+ dev_dbg(dev, "Set SENS_CONF to %x\n", sens_conf | dw);
+
+ return 0;
+}
+
+static struct soc_camera_host_ops mx3_soc_camera_host_ops = {
+ .owner = THIS_MODULE,
+ .add = mx3_camera_add_device,
+ .remove = mx3_camera_remove_device,
+ .set_crop = mx3_camera_set_crop,
+ .set_fmt = mx3_camera_set_fmt,
+ .try_fmt = mx3_camera_try_fmt,
+ .get_formats = mx3_camera_get_formats,
+ .init_videobuf2 = mx3_camera_init_videobuf,
+ .reqbufs = mx3_camera_reqbufs,
+ .poll = mx3_camera_poll,
+ .querycap = mx3_camera_querycap,
+ .set_bus_param = mx3_camera_set_bus_param,
+};
+
+static int __devinit mx3_camera_probe(struct platform_device *pdev)
+{
+ struct mx3_camera_dev *mx3_cam;
+ struct resource *res;
+ void __iomem *base;
+ int err = 0;
+ struct soc_camera_host *soc_host;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ err = -ENODEV;
+ goto egetres;
+ }
+
+ mx3_cam = vzalloc(sizeof(*mx3_cam));
+ if (!mx3_cam) {
+ dev_err(&pdev->dev, "Could not allocate mx3 camera object\n");
+ err = -ENOMEM;
+ goto ealloc;
+ }
+
+ mx3_cam->clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(mx3_cam->clk)) {
+ err = PTR_ERR(mx3_cam->clk);
+ goto eclkget;
+ }
+
+ mx3_cam->pdata = pdev->dev.platform_data;
+ mx3_cam->platform_flags = mx3_cam->pdata->flags;
+ if (!(mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_MASK)) {
+ /*
+ * Platform hasn't set available data widths. This is bad.
+ * Warn and use a default.
+ */
+ dev_warn(&pdev->dev, "WARNING! Platform hasn't set available "
+ "data widths, using default 8 bit\n");
+ mx3_cam->platform_flags |= MX3_CAMERA_DATAWIDTH_8;
+ }
+ if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_4)
+ mx3_cam->width_flags = 1 << 3;
+ if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_8)
+ mx3_cam->width_flags |= 1 << 7;
+ if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_10)
+ mx3_cam->width_flags |= 1 << 9;
+ if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_15)
+ mx3_cam->width_flags |= 1 << 14;
+
+ mx3_cam->mclk = mx3_cam->pdata->mclk_10khz * 10000;
+ if (!mx3_cam->mclk) {
+ dev_warn(&pdev->dev,
+ "mclk_10khz == 0! Please, fix your platform data. "
+ "Using default 20MHz\n");
+ mx3_cam->mclk = 20000000;
+ }
+
+ /* list of video-buffers */
+ INIT_LIST_HEAD(&mx3_cam->capture);
+ spin_lock_init(&mx3_cam->lock);
+
+ base = ioremap(res->start, resource_size(res));
+ if (!base) {
+ pr_err("Couldn't map %x@%x\n", resource_size(res), res->start);
+ err = -ENOMEM;
+ goto eioremap;
+ }
+
+ mx3_cam->base = base;
+
+ soc_host = &mx3_cam->soc_host;
+ soc_host->drv_name = MX3_CAM_DRV_NAME;
+ soc_host->ops = &mx3_soc_camera_host_ops;
+ soc_host->priv = mx3_cam;
+ soc_host->v4l2_dev.dev = &pdev->dev;
+ soc_host->nr = pdev->id;
+
+ mx3_cam->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
+ if (IS_ERR(mx3_cam->alloc_ctx)) {
+ err = PTR_ERR(mx3_cam->alloc_ctx);
+ goto eallocctx;
+ }
+
+ err = soc_camera_host_register(soc_host);
+ if (err)
+ goto ecamhostreg;
+
+ /* IDMAC interface */
+ dmaengine_get();
+
+ return 0;
+
+ecamhostreg:
+ vb2_dma_contig_cleanup_ctx(mx3_cam->alloc_ctx);
+eallocctx:
+ iounmap(base);
+eioremap:
+ clk_put(mx3_cam->clk);
+eclkget:
+ vfree(mx3_cam);
+ealloc:
+egetres:
+ return err;
+}
+
+static int __devexit mx3_camera_remove(struct platform_device *pdev)
+{
+ struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
+ struct mx3_camera_dev *mx3_cam = container_of(soc_host,
+ struct mx3_camera_dev, soc_host);
+
+ clk_put(mx3_cam->clk);
+
+ soc_camera_host_unregister(soc_host);
+
+ iounmap(mx3_cam->base);
+
+ /*
+ * The channel has either not been allocated,
+ * or should have been released
+ */
+ if (WARN_ON(mx3_cam->idmac_channel[0]))
+ dma_release_channel(&mx3_cam->idmac_channel[0]->dma_chan);
+
+ vb2_dma_contig_cleanup_ctx(mx3_cam->alloc_ctx);
+
+ vfree(mx3_cam);
+
+ dmaengine_put();
+
+ return 0;
+}
+
+static struct platform_driver mx3_camera_driver = {
+ .driver = {
+ .name = MX3_CAM_DRV_NAME,
+ },
+ .probe = mx3_camera_probe,
+ .remove = __devexit_p(mx3_camera_remove),
+};
+
+module_platform_driver(mx3_camera_driver);
+
+MODULE_DESCRIPTION("i.MX3x SoC Camera Host driver");
+MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>");
+MODULE_LICENSE("GPL v2");
+MODULE_VERSION("0.2.3");
+MODULE_ALIAS("platform:" MX3_CAM_DRV_NAME);
--- /dev/null
- #include <mach/camera.h>
+/*
+ * V4L2 Driver for PXA camera host
+ *
+ * Copyright (C) 2006, Sascha Hauer, Pengutronix
+ * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/moduleparam.h>
+#include <linux/time.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-dev.h>
+#include <media/videobuf-dma-sg.h>
+#include <media/soc_camera.h>
+#include <media/soc_mediabus.h>
+
+#include <linux/videodev2.h>
+
+#include <mach/dma.h>
++#include <linux/platform_data/camera-pxa.h>
+
+#define PXA_CAM_VERSION "0.0.6"
+#define PXA_CAM_DRV_NAME "pxa27x-camera"
+
+/* Camera Interface */
+#define CICR0 0x0000
+#define CICR1 0x0004
+#define CICR2 0x0008
+#define CICR3 0x000C
+#define CICR4 0x0010
+#define CISR 0x0014
+#define CIFR 0x0018
+#define CITOR 0x001C
+#define CIBR0 0x0028
+#define CIBR1 0x0030
+#define CIBR2 0x0038
+
+#define CICR0_DMAEN (1 << 31) /* DMA request enable */
+#define CICR0_PAR_EN (1 << 30) /* Parity enable */
+#define CICR0_SL_CAP_EN (1 << 29) /* Capture enable for slave mode */
+#define CICR0_ENB (1 << 28) /* Camera interface enable */
+#define CICR0_DIS (1 << 27) /* Camera interface disable */
+#define CICR0_SIM (0x7 << 24) /* Sensor interface mode mask */
+#define CICR0_TOM (1 << 9) /* Time-out mask */
+#define CICR0_RDAVM (1 << 8) /* Receive-data-available mask */
+#define CICR0_FEM (1 << 7) /* FIFO-empty mask */
+#define CICR0_EOLM (1 << 6) /* End-of-line mask */
+#define CICR0_PERRM (1 << 5) /* Parity-error mask */
+#define CICR0_QDM (1 << 4) /* Quick-disable mask */
+#define CICR0_CDM (1 << 3) /* Disable-done mask */
+#define CICR0_SOFM (1 << 2) /* Start-of-frame mask */
+#define CICR0_EOFM (1 << 1) /* End-of-frame mask */
+#define CICR0_FOM (1 << 0) /* FIFO-overrun mask */
+
+#define CICR1_TBIT (1 << 31) /* Transparency bit */
+#define CICR1_RGBT_CONV (0x3 << 29) /* RGBT conversion mask */
+#define CICR1_PPL (0x7ff << 15) /* Pixels per line mask */
+#define CICR1_RGB_CONV (0x7 << 12) /* RGB conversion mask */
+#define CICR1_RGB_F (1 << 11) /* RGB format */
+#define CICR1_YCBCR_F (1 << 10) /* YCbCr format */
+#define CICR1_RGB_BPP (0x7 << 7) /* RGB bis per pixel mask */
+#define CICR1_RAW_BPP (0x3 << 5) /* Raw bis per pixel mask */
+#define CICR1_COLOR_SP (0x3 << 3) /* Color space mask */
+#define CICR1_DW (0x7 << 0) /* Data width mask */
+
+#define CICR2_BLW (0xff << 24) /* Beginning-of-line pixel clock
+ wait count mask */
+#define CICR2_ELW (0xff << 16) /* End-of-line pixel clock
+ wait count mask */
+#define CICR2_HSW (0x3f << 10) /* Horizontal sync pulse width mask */
+#define CICR2_BFPW (0x3f << 3) /* Beginning-of-frame pixel clock
+ wait count mask */
+#define CICR2_FSW (0x7 << 0) /* Frame stabilization
+ wait count mask */
+
+#define CICR3_BFW (0xff << 24) /* Beginning-of-frame line clock
+ wait count mask */
+#define CICR3_EFW (0xff << 16) /* End-of-frame line clock
+ wait count mask */
+#define CICR3_VSW (0x3f << 10) /* Vertical sync pulse width mask */
+#define CICR3_BFPW (0x3f << 3) /* Beginning-of-frame pixel clock
+ wait count mask */
+#define CICR3_LPF (0x7ff << 0) /* Lines per frame mask */
+
+#define CICR4_MCLK_DLY (0x3 << 24) /* MCLK Data Capture Delay mask */
+#define CICR4_PCLK_EN (1 << 23) /* Pixel clock enable */
+#define CICR4_PCP (1 << 22) /* Pixel clock polarity */
+#define CICR4_HSP (1 << 21) /* Horizontal sync polarity */
+#define CICR4_VSP (1 << 20) /* Vertical sync polarity */
+#define CICR4_MCLK_EN (1 << 19) /* MCLK enable */
+#define CICR4_FR_RATE (0x7 << 8) /* Frame rate mask */
+#define CICR4_DIV (0xff << 0) /* Clock divisor mask */
+
+#define CISR_FTO (1 << 15) /* FIFO time-out */
+#define CISR_RDAV_2 (1 << 14) /* Channel 2 receive data available */
+#define CISR_RDAV_1 (1 << 13) /* Channel 1 receive data available */
+#define CISR_RDAV_0 (1 << 12) /* Channel 0 receive data available */
+#define CISR_FEMPTY_2 (1 << 11) /* Channel 2 FIFO empty */
+#define CISR_FEMPTY_1 (1 << 10) /* Channel 1 FIFO empty */
+#define CISR_FEMPTY_0 (1 << 9) /* Channel 0 FIFO empty */
+#define CISR_EOL (1 << 8) /* End of line */
+#define CISR_PAR_ERR (1 << 7) /* Parity error */
+#define CISR_CQD (1 << 6) /* Camera interface quick disable */
+#define CISR_CDD (1 << 5) /* Camera interface disable done */
+#define CISR_SOF (1 << 4) /* Start of frame */
+#define CISR_EOF (1 << 3) /* End of frame */
+#define CISR_IFO_2 (1 << 2) /* FIFO overrun for Channel 2 */
+#define CISR_IFO_1 (1 << 1) /* FIFO overrun for Channel 1 */
+#define CISR_IFO_0 (1 << 0) /* FIFO overrun for Channel 0 */
+
+#define CIFR_FLVL2 (0x7f << 23) /* FIFO 2 level mask */
+#define CIFR_FLVL1 (0x7f << 16) /* FIFO 1 level mask */
+#define CIFR_FLVL0 (0xff << 8) /* FIFO 0 level mask */
+#define CIFR_THL_0 (0x3 << 4) /* Threshold Level for Channel 0 FIFO */
+#define CIFR_RESET_F (1 << 3) /* Reset input FIFOs */
+#define CIFR_FEN2 (1 << 2) /* FIFO enable for channel 2 */
+#define CIFR_FEN1 (1 << 1) /* FIFO enable for channel 1 */
+#define CIFR_FEN0 (1 << 0) /* FIFO enable for channel 0 */
+
+#define CICR0_SIM_MP (0 << 24)
+#define CICR0_SIM_SP (1 << 24)
+#define CICR0_SIM_MS (2 << 24)
+#define CICR0_SIM_EP (3 << 24)
+#define CICR0_SIM_ES (4 << 24)
+
+#define CICR1_DW_VAL(x) ((x) & CICR1_DW) /* Data bus width */
+#define CICR1_PPL_VAL(x) (((x) << 15) & CICR1_PPL) /* Pixels per line */
+#define CICR1_COLOR_SP_VAL(x) (((x) << 3) & CICR1_COLOR_SP) /* color space */
+#define CICR1_RGB_BPP_VAL(x) (((x) << 7) & CICR1_RGB_BPP) /* bpp for rgb */
+#define CICR1_RGBT_CONV_VAL(x) (((x) << 29) & CICR1_RGBT_CONV) /* rgbt conv */
+
+#define CICR2_BLW_VAL(x) (((x) << 24) & CICR2_BLW) /* Beginning-of-line pixel clock wait count */
+#define CICR2_ELW_VAL(x) (((x) << 16) & CICR2_ELW) /* End-of-line pixel clock wait count */
+#define CICR2_HSW_VAL(x) (((x) << 10) & CICR2_HSW) /* Horizontal sync pulse width */
+#define CICR2_BFPW_VAL(x) (((x) << 3) & CICR2_BFPW) /* Beginning-of-frame pixel clock wait count */
+#define CICR2_FSW_VAL(x) (((x) << 0) & CICR2_FSW) /* Frame stabilization wait count */
+
+#define CICR3_BFW_VAL(x) (((x) << 24) & CICR3_BFW) /* Beginning-of-frame line clock wait count */
+#define CICR3_EFW_VAL(x) (((x) << 16) & CICR3_EFW) /* End-of-frame line clock wait count */
+#define CICR3_VSW_VAL(x) (((x) << 11) & CICR3_VSW) /* Vertical sync pulse width */
+#define CICR3_LPF_VAL(x) (((x) << 0) & CICR3_LPF) /* Lines per frame */
+
+#define CICR0_IRQ_MASK (CICR0_TOM | CICR0_RDAVM | CICR0_FEM | CICR0_EOLM | \
+ CICR0_PERRM | CICR0_QDM | CICR0_CDM | CICR0_SOFM | \
+ CICR0_EOFM | CICR0_FOM)
+
+/*
+ * Structures
+ */
+enum pxa_camera_active_dma {
+ DMA_Y = 0x1,
+ DMA_U = 0x2,
+ DMA_V = 0x4,
+};
+
+/* descriptor needed for the PXA DMA engine */
+struct pxa_cam_dma {
+ dma_addr_t sg_dma;
+ struct pxa_dma_desc *sg_cpu;
+ size_t sg_size;
+ int sglen;
+};
+
+/* buffer for one video frame */
+struct pxa_buffer {
+ /* common v4l buffer stuff -- must be first */
+ struct videobuf_buffer vb;
+ enum v4l2_mbus_pixelcode code;
+ /* our descriptor lists for Y, U and V channels */
+ struct pxa_cam_dma dmas[3];
+ int inwork;
+ enum pxa_camera_active_dma active_dma;
+};
+
+struct pxa_camera_dev {
+ struct soc_camera_host soc_host;
+ /*
+ * PXA27x is only supposed to handle one camera on its Quick Capture
+ * interface. If anyone ever builds hardware to enable more than
+ * one camera, they will have to modify this driver too
+ */
+ struct soc_camera_device *icd;
+ struct clk *clk;
+
+ unsigned int irq;
+ void __iomem *base;
+
+ int channels;
+ unsigned int dma_chans[3];
+
+ struct pxacamera_platform_data *pdata;
+ struct resource *res;
+ unsigned long platform_flags;
+ unsigned long ciclk;
+ unsigned long mclk;
+ u32 mclk_divisor;
+ u16 width_flags; /* max 10 bits */
+
+ struct list_head capture;
+
+ spinlock_t lock;
+
+ struct pxa_buffer *active;
+ struct pxa_dma_desc *sg_tail[3];
+
+ u32 save_cicr[5];
+};
+
+struct pxa_cam {
+ unsigned long flags;
+};
+
+static const char *pxa_cam_driver_description = "PXA_Camera";
+
+static unsigned int vid_limit = 16; /* Video memory limit, in Mb */
+
+/*
+ * Videobuf operations
+ */
+static int pxa_videobuf_setup(struct videobuf_queue *vq, unsigned int *count,
+ unsigned int *size)
+{
+ struct soc_camera_device *icd = vq->priv_data;
+
+ dev_dbg(icd->parent, "count=%d, size=%d\n", *count, *size);
+
+ *size = icd->sizeimage;
+
+ if (0 == *count)
+ *count = 32;
+ if (*size * *count > vid_limit * 1024 * 1024)
+ *count = (vid_limit * 1024 * 1024) / *size;
+
+ return 0;
+}
+
+static void free_buffer(struct videobuf_queue *vq, struct pxa_buffer *buf)
+{
+ struct soc_camera_device *icd = vq->priv_data;
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
+ int i;
+
+ BUG_ON(in_interrupt());
+
+ dev_dbg(icd->parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
+ &buf->vb, buf->vb.baddr, buf->vb.bsize);
+
+ /*
+ * This waits until this buffer is out of danger, i.e., until it is no
+ * longer in STATE_QUEUED or STATE_ACTIVE
+ */
+ videobuf_waiton(vq, &buf->vb, 0, 0);
+ videobuf_dma_unmap(vq->dev, dma);
+ videobuf_dma_free(dma);
+
+ for (i = 0; i < ARRAY_SIZE(buf->dmas); i++) {
+ if (buf->dmas[i].sg_cpu)
+ dma_free_coherent(ici->v4l2_dev.dev,
+ buf->dmas[i].sg_size,
+ buf->dmas[i].sg_cpu,
+ buf->dmas[i].sg_dma);
+ buf->dmas[i].sg_cpu = NULL;
+ }
+
+ buf->vb.state = VIDEOBUF_NEEDS_INIT;
+}
+
+static int calculate_dma_sglen(struct scatterlist *sglist, int sglen,
+ int sg_first_ofs, int size)
+{
+ int i, offset, dma_len, xfer_len;
+ struct scatterlist *sg;
+
+ offset = sg_first_ofs;
+ for_each_sg(sglist, sg, sglen, i) {
+ dma_len = sg_dma_len(sg);
+
+ /* PXA27x Developer's Manual 27.4.4.1: round up to 8 bytes */
+ xfer_len = roundup(min(dma_len - offset, size), 8);
+
+ size = max(0, size - xfer_len);
+ offset = 0;
+ if (size == 0)
+ break;
+ }
+
+ BUG_ON(size != 0);
+ return i + 1;
+}
+
+/**
+ * pxa_init_dma_channel - init dma descriptors
+ * @pcdev: pxa camera device
+ * @buf: pxa buffer to find pxa dma channel
+ * @dma: dma video buffer
+ * @channel: dma channel (0 => 'Y', 1 => 'U', 2 => 'V')
+ * @cibr: camera Receive Buffer Register
+ * @size: bytes to transfer
+ * @sg_first: first element of sg_list
+ * @sg_first_ofs: offset in first element of sg_list
+ *
+ * Prepares the pxa dma descriptors to transfer one camera channel.
+ * Beware sg_first and sg_first_ofs are both input and output parameters.
+ *
+ * Returns 0 or -ENOMEM if no coherent memory is available
+ */
+static int pxa_init_dma_channel(struct pxa_camera_dev *pcdev,
+ struct pxa_buffer *buf,
+ struct videobuf_dmabuf *dma, int channel,
+ int cibr, int size,
+ struct scatterlist **sg_first, int *sg_first_ofs)
+{
+ struct pxa_cam_dma *pxa_dma = &buf->dmas[channel];
+ struct device *dev = pcdev->soc_host.v4l2_dev.dev;
+ struct scatterlist *sg;
+ int i, offset, sglen;
+ int dma_len = 0, xfer_len = 0;
+
+ if (pxa_dma->sg_cpu)
+ dma_free_coherent(dev, pxa_dma->sg_size,
+ pxa_dma->sg_cpu, pxa_dma->sg_dma);
+
+ sglen = calculate_dma_sglen(*sg_first, dma->sglen,
+ *sg_first_ofs, size);
+
+ pxa_dma->sg_size = (sglen + 1) * sizeof(struct pxa_dma_desc);
+ pxa_dma->sg_cpu = dma_alloc_coherent(dev, pxa_dma->sg_size,
+ &pxa_dma->sg_dma, GFP_KERNEL);
+ if (!pxa_dma->sg_cpu)
+ return -ENOMEM;
+
+ pxa_dma->sglen = sglen;
+ offset = *sg_first_ofs;
+
+ dev_dbg(dev, "DMA: sg_first=%p, sglen=%d, ofs=%d, dma.desc=%x\n",
+ *sg_first, sglen, *sg_first_ofs, pxa_dma->sg_dma);
+
+
+ for_each_sg(*sg_first, sg, sglen, i) {
+ dma_len = sg_dma_len(sg);
+
+ /* PXA27x Developer's Manual 27.4.4.1: round up to 8 bytes */
+ xfer_len = roundup(min(dma_len - offset, size), 8);
+
+ size = max(0, size - xfer_len);
+
+ pxa_dma->sg_cpu[i].dsadr = pcdev->res->start + cibr;
+ pxa_dma->sg_cpu[i].dtadr = sg_dma_address(sg) + offset;
+ pxa_dma->sg_cpu[i].dcmd =
+ DCMD_FLOWSRC | DCMD_BURST8 | DCMD_INCTRGADDR | xfer_len;
+#ifdef DEBUG
+ if (!i)
+ pxa_dma->sg_cpu[i].dcmd |= DCMD_STARTIRQEN;
+#endif
+ pxa_dma->sg_cpu[i].ddadr =
+ pxa_dma->sg_dma + (i + 1) * sizeof(struct pxa_dma_desc);
+
+ dev_vdbg(dev, "DMA: desc.%08x->@phys=0x%08x, len=%d\n",
+ pxa_dma->sg_dma + i * sizeof(struct pxa_dma_desc),
+ sg_dma_address(sg) + offset, xfer_len);
+ offset = 0;
+
+ if (size == 0)
+ break;
+ }
+
+ pxa_dma->sg_cpu[sglen].ddadr = DDADR_STOP;
+ pxa_dma->sg_cpu[sglen].dcmd = DCMD_FLOWSRC | DCMD_BURST8 | DCMD_ENDIRQEN;
+
+ /*
+ * Handle 1 special case :
+ * - in 3 planes (YUV422P format), we might finish with xfer_len equal
+ * to dma_len (end on PAGE boundary). In this case, the sg element
+ * for next plane should be the next after the last used to store the
+ * last scatter gather RAM page
+ */
+ if (xfer_len >= dma_len) {
+ *sg_first_ofs = xfer_len - dma_len;
+ *sg_first = sg_next(sg);
+ } else {
+ *sg_first_ofs = xfer_len;
+ *sg_first = sg;
+ }
+
+ return 0;
+}
+
+static void pxa_videobuf_set_actdma(struct pxa_camera_dev *pcdev,
+ struct pxa_buffer *buf)
+{
+ buf->active_dma = DMA_Y;
+ if (pcdev->channels == 3)
+ buf->active_dma |= DMA_U | DMA_V;
+}
+
+/*
+ * Please check the DMA prepared buffer structure in :
+ * Documentation/video4linux/pxa_camera.txt
+ * Please check also in pxa_camera_check_link_miss() to understand why DMA chain
+ * modification while DMA chain is running will work anyway.
+ */
+static int pxa_videobuf_prepare(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb, enum v4l2_field field)
+{
+ struct soc_camera_device *icd = vq->priv_data;
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct pxa_camera_dev *pcdev = ici->priv;
+ struct device *dev = pcdev->soc_host.v4l2_dev.dev;
+ struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
+ int ret;
+ int size_y, size_u = 0, size_v = 0;
+
+ dev_dbg(dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
+ vb, vb->baddr, vb->bsize);
+
+ /* Added list head initialization on alloc */
+ WARN_ON(!list_empty(&vb->queue));
+
+#ifdef DEBUG
+ /*
+ * This can be useful if you want to see if we actually fill
+ * the buffer with something
+ */
+ memset((void *)vb->baddr, 0xaa, vb->bsize);
+#endif
+
+ BUG_ON(NULL == icd->current_fmt);
+
+ /*
+ * I think, in buf_prepare you only have to protect global data,
+ * the actual buffer is yours
+ */
+ buf->inwork = 1;
+
+ if (buf->code != icd->current_fmt->code ||
+ vb->width != icd->user_width ||
+ vb->height != icd->user_height ||
+ vb->field != field) {
+ buf->code = icd->current_fmt->code;
+ vb->width = icd->user_width;
+ vb->height = icd->user_height;
+ vb->field = field;
+ vb->state = VIDEOBUF_NEEDS_INIT;
+ }
+
+ vb->size = icd->sizeimage;
+ if (0 != vb->baddr && vb->bsize < vb->size) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (vb->state == VIDEOBUF_NEEDS_INIT) {
+ int size = vb->size;
+ int next_ofs = 0;
+ struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
+ struct scatterlist *sg;
+
+ ret = videobuf_iolock(vq, vb, NULL);
+ if (ret)
+ goto fail;
+
+ if (pcdev->channels == 3) {
+ size_y = size / 2;
+ size_u = size_v = size / 4;
+ } else {
+ size_y = size;
+ }
+
+ sg = dma->sglist;
+
+ /* init DMA for Y channel */
+ ret = pxa_init_dma_channel(pcdev, buf, dma, 0, CIBR0, size_y,
+ &sg, &next_ofs);
+ if (ret) {
+ dev_err(dev, "DMA initialization for Y/RGB failed\n");
+ goto fail;
+ }
+
+ /* init DMA for U channel */
+ if (size_u)
+ ret = pxa_init_dma_channel(pcdev, buf, dma, 1, CIBR1,
+ size_u, &sg, &next_ofs);
+ if (ret) {
+ dev_err(dev, "DMA initialization for U failed\n");
+ goto fail_u;
+ }
+
+ /* init DMA for V channel */
+ if (size_v)
+ ret = pxa_init_dma_channel(pcdev, buf, dma, 2, CIBR2,
+ size_v, &sg, &next_ofs);
+ if (ret) {
+ dev_err(dev, "DMA initialization for V failed\n");
+ goto fail_v;
+ }
+
+ vb->state = VIDEOBUF_PREPARED;
+ }
+
+ buf->inwork = 0;
+ pxa_videobuf_set_actdma(pcdev, buf);
+
+ return 0;
+
+fail_v:
+ dma_free_coherent(dev, buf->dmas[1].sg_size,
+ buf->dmas[1].sg_cpu, buf->dmas[1].sg_dma);
+fail_u:
+ dma_free_coherent(dev, buf->dmas[0].sg_size,
+ buf->dmas[0].sg_cpu, buf->dmas[0].sg_dma);
+fail:
+ free_buffer(vq, buf);
+out:
+ buf->inwork = 0;
+ return ret;
+}
+
+/**
+ * pxa_dma_start_channels - start DMA channel for active buffer
+ * @pcdev: pxa camera device
+ *
+ * Initialize DMA channels to the beginning of the active video buffer, and
+ * start these channels.
+ */
+static void pxa_dma_start_channels(struct pxa_camera_dev *pcdev)
+{
+ int i;
+ struct pxa_buffer *active;
+
+ active = pcdev->active;
+
+ for (i = 0; i < pcdev->channels; i++) {
+ dev_dbg(pcdev->soc_host.v4l2_dev.dev,
+ "%s (channel=%d) ddadr=%08x\n", __func__,
+ i, active->dmas[i].sg_dma);
+ DDADR(pcdev->dma_chans[i]) = active->dmas[i].sg_dma;
+ DCSR(pcdev->dma_chans[i]) = DCSR_RUN;
+ }
+}
+
+static void pxa_dma_stop_channels(struct pxa_camera_dev *pcdev)
+{
+ int i;
+
+ for (i = 0; i < pcdev->channels; i++) {
+ dev_dbg(pcdev->soc_host.v4l2_dev.dev,
+ "%s (channel=%d)\n", __func__, i);
+ DCSR(pcdev->dma_chans[i]) = 0;
+ }
+}
+
+static void pxa_dma_add_tail_buf(struct pxa_camera_dev *pcdev,
+ struct pxa_buffer *buf)
+{
+ int i;
+ struct pxa_dma_desc *buf_last_desc;
+
+ for (i = 0; i < pcdev->channels; i++) {
+ buf_last_desc = buf->dmas[i].sg_cpu + buf->dmas[i].sglen;
+ buf_last_desc->ddadr = DDADR_STOP;
+
+ if (pcdev->sg_tail[i])
+ /* Link the new buffer to the old tail */
+ pcdev->sg_tail[i]->ddadr = buf->dmas[i].sg_dma;
+
+ /* Update the channel tail */
+ pcdev->sg_tail[i] = buf_last_desc;
+ }
+}
+
+/**
+ * pxa_camera_start_capture - start video capturing
+ * @pcdev: camera device
+ *
+ * Launch capturing. DMA channels should not be active yet. They should get
+ * activated at the end of frame interrupt, to capture only whole frames, and
+ * never begin the capture of a partial frame.
+ */
+static void pxa_camera_start_capture(struct pxa_camera_dev *pcdev)
+{
+ unsigned long cicr0;
+
+ dev_dbg(pcdev->soc_host.v4l2_dev.dev, "%s\n", __func__);
+ /* Enable End-Of-Frame Interrupt */
+ cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_ENB;
+ cicr0 &= ~CICR0_EOFM;
+ __raw_writel(cicr0, pcdev->base + CICR0);
+}
+
+static void pxa_camera_stop_capture(struct pxa_camera_dev *pcdev)
+{
+ unsigned long cicr0;
+
+ pxa_dma_stop_channels(pcdev);
+
+ cicr0 = __raw_readl(pcdev->base + CICR0) & ~CICR0_ENB;
+ __raw_writel(cicr0, pcdev->base + CICR0);
+
+ pcdev->active = NULL;
+ dev_dbg(pcdev->soc_host.v4l2_dev.dev, "%s\n", __func__);
+}
+
+/* Called under spinlock_irqsave(&pcdev->lock, ...) */
+static void pxa_videobuf_queue(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb)
+{
+ struct soc_camera_device *icd = vq->priv_data;
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct pxa_camera_dev *pcdev = ici->priv;
+ struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
+
+ dev_dbg(icd->parent, "%s (vb=0x%p) 0x%08lx %d active=%p\n",
+ __func__, vb, vb->baddr, vb->bsize, pcdev->active);
+
+ list_add_tail(&vb->queue, &pcdev->capture);
+
+ vb->state = VIDEOBUF_ACTIVE;
+ pxa_dma_add_tail_buf(pcdev, buf);
+
+ if (!pcdev->active)
+ pxa_camera_start_capture(pcdev);
+}
+
+static void pxa_videobuf_release(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb)
+{
+ struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
+#ifdef DEBUG
+ struct soc_camera_device *icd = vq->priv_data;
+ struct device *dev = icd->parent;
+
+ dev_dbg(dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
+ vb, vb->baddr, vb->bsize);
+
+ switch (vb->state) {
+ case VIDEOBUF_ACTIVE:
+ dev_dbg(dev, "%s (active)\n", __func__);
+ break;
+ case VIDEOBUF_QUEUED:
+ dev_dbg(dev, "%s (queued)\n", __func__);
+ break;
+ case VIDEOBUF_PREPARED:
+ dev_dbg(dev, "%s (prepared)\n", __func__);
+ break;
+ default:
+ dev_dbg(dev, "%s (unknown)\n", __func__);
+ break;
+ }
+#endif
+
+ free_buffer(vq, buf);
+}
+
+static void pxa_camera_wakeup(struct pxa_camera_dev *pcdev,
+ struct videobuf_buffer *vb,
+ struct pxa_buffer *buf)
+{
+ int i;
+
+ /* _init is used to debug races, see comment in pxa_camera_reqbufs() */
+ list_del_init(&vb->queue);
+ vb->state = VIDEOBUF_DONE;
+ do_gettimeofday(&vb->ts);
+ vb->field_count++;
+ wake_up(&vb->done);
+ dev_dbg(pcdev->soc_host.v4l2_dev.dev, "%s dequeud buffer (vb=0x%p)\n",
+ __func__, vb);
+
+ if (list_empty(&pcdev->capture)) {
+ pxa_camera_stop_capture(pcdev);
+ for (i = 0; i < pcdev->channels; i++)
+ pcdev->sg_tail[i] = NULL;
+ return;
+ }
+
+ pcdev->active = list_entry(pcdev->capture.next,
+ struct pxa_buffer, vb.queue);
+}
+
+/**
+ * pxa_camera_check_link_miss - check missed DMA linking
+ * @pcdev: camera device
+ *
+ * The DMA chaining is done with DMA running. This means a tiny temporal window
+ * remains, where a buffer is queued on the chain, while the chain is already
+ * stopped. This means the tailed buffer would never be transferred by DMA.
+ * This function restarts the capture for this corner case, where :
+ * - DADR() == DADDR_STOP
+ * - a videobuffer is queued on the pcdev->capture list
+ *
+ * Please check the "DMA hot chaining timeslice issue" in
+ * Documentation/video4linux/pxa_camera.txt
+ *
+ * Context: should only be called within the dma irq handler
+ */
+static void pxa_camera_check_link_miss(struct pxa_camera_dev *pcdev)
+{
+ int i, is_dma_stopped = 1;
+
+ for (i = 0; i < pcdev->channels; i++)
+ if (DDADR(pcdev->dma_chans[i]) != DDADR_STOP)
+ is_dma_stopped = 0;
+ dev_dbg(pcdev->soc_host.v4l2_dev.dev,
+ "%s : top queued buffer=%p, dma_stopped=%d\n",
+ __func__, pcdev->active, is_dma_stopped);
+ if (pcdev->active && is_dma_stopped)
+ pxa_camera_start_capture(pcdev);
+}
+
+static void pxa_camera_dma_irq(int channel, struct pxa_camera_dev *pcdev,
+ enum pxa_camera_active_dma act_dma)
+{
+ struct device *dev = pcdev->soc_host.v4l2_dev.dev;
+ struct pxa_buffer *buf;
+ unsigned long flags;
+ u32 status, camera_status, overrun;
+ struct videobuf_buffer *vb;
+
+ spin_lock_irqsave(&pcdev->lock, flags);
+
+ status = DCSR(channel);
+ DCSR(channel) = status;
+
+ camera_status = __raw_readl(pcdev->base + CISR);
+ overrun = CISR_IFO_0;
+ if (pcdev->channels == 3)
+ overrun |= CISR_IFO_1 | CISR_IFO_2;
+
+ if (status & DCSR_BUSERR) {
+ dev_err(dev, "DMA Bus Error IRQ!\n");
+ goto out;
+ }
+
+ if (!(status & (DCSR_ENDINTR | DCSR_STARTINTR))) {
+ dev_err(dev, "Unknown DMA IRQ source, status: 0x%08x\n",
+ status);
+ goto out;
+ }
+
+ /*
+ * pcdev->active should not be NULL in DMA irq handler.
+ *
+ * But there is one corner case : if capture was stopped due to an
+ * overrun of channel 1, and at that same channel 2 was completed.
+ *
+ * When handling the overrun in DMA irq for channel 1, we'll stop the
+ * capture and restart it (and thus set pcdev->active to NULL). But the
+ * DMA irq handler will already be pending for channel 2. So on entering
+ * the DMA irq handler for channel 2 there will be no active buffer, yet
+ * that is normal.
+ */
+ if (!pcdev->active)
+ goto out;
+
+ vb = &pcdev->active->vb;
+ buf = container_of(vb, struct pxa_buffer, vb);
+ WARN_ON(buf->inwork || list_empty(&vb->queue));
+
+ dev_dbg(dev, "%s channel=%d %s%s(vb=0x%p) dma.desc=%x\n",
+ __func__, channel, status & DCSR_STARTINTR ? "SOF " : "",
+ status & DCSR_ENDINTR ? "EOF " : "", vb, DDADR(channel));
+
+ if (status & DCSR_ENDINTR) {
+ /*
+ * It's normal if the last frame creates an overrun, as there
+ * are no more DMA descriptors to fetch from QCI fifos
+ */
+ if (camera_status & overrun &&
+ !list_is_last(pcdev->capture.next, &pcdev->capture)) {
+ dev_dbg(dev, "FIFO overrun! CISR: %x\n",
+ camera_status);
+ pxa_camera_stop_capture(pcdev);
+ pxa_camera_start_capture(pcdev);
+ goto out;
+ }
+ buf->active_dma &= ~act_dma;
+ if (!buf->active_dma) {
+ pxa_camera_wakeup(pcdev, vb, buf);
+ pxa_camera_check_link_miss(pcdev);
+ }
+ }
+
+out:
+ spin_unlock_irqrestore(&pcdev->lock, flags);
+}
+
+static void pxa_camera_dma_irq_y(int channel, void *data)
+{
+ struct pxa_camera_dev *pcdev = data;
+ pxa_camera_dma_irq(channel, pcdev, DMA_Y);
+}
+
+static void pxa_camera_dma_irq_u(int channel, void *data)
+{
+ struct pxa_camera_dev *pcdev = data;
+ pxa_camera_dma_irq(channel, pcdev, DMA_U);
+}
+
+static void pxa_camera_dma_irq_v(int channel, void *data)
+{
+ struct pxa_camera_dev *pcdev = data;
+ pxa_camera_dma_irq(channel, pcdev, DMA_V);
+}
+
+static struct videobuf_queue_ops pxa_videobuf_ops = {
+ .buf_setup = pxa_videobuf_setup,
+ .buf_prepare = pxa_videobuf_prepare,
+ .buf_queue = pxa_videobuf_queue,
+ .buf_release = pxa_videobuf_release,
+};
+
+static void pxa_camera_init_videobuf(struct videobuf_queue *q,
+ struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct pxa_camera_dev *pcdev = ici->priv;
+
+ /*
+ * We must pass NULL as dev pointer, then all pci_* dma operations
+ * transform to normal dma_* ones.
+ */
+ videobuf_queue_sg_init(q, &pxa_videobuf_ops, NULL, &pcdev->lock,
+ V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE,
+ sizeof(struct pxa_buffer), icd, &icd->video_lock);
+}
+
+static u32 mclk_get_divisor(struct platform_device *pdev,
+ struct pxa_camera_dev *pcdev)
+{
+ unsigned long mclk = pcdev->mclk;
+ struct device *dev = &pdev->dev;
+ u32 div;
+ unsigned long lcdclk;
+
+ lcdclk = clk_get_rate(pcdev->clk);
+ pcdev->ciclk = lcdclk;
+
+ /* mclk <= ciclk / 4 (27.4.2) */
+ if (mclk > lcdclk / 4) {
+ mclk = lcdclk / 4;
+ dev_warn(dev, "Limiting master clock to %lu\n", mclk);
+ }
+
+ /* We verify mclk != 0, so if anyone breaks it, here comes their Oops */
+ div = (lcdclk + 2 * mclk - 1) / (2 * mclk) - 1;
+
+ /* If we're not supplying MCLK, leave it at 0 */
+ if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
+ pcdev->mclk = lcdclk / (2 * (div + 1));
+
+ dev_dbg(dev, "LCD clock %luHz, target freq %luHz, divisor %u\n",
+ lcdclk, mclk, div);
+
+ return div;
+}
+
+static void recalculate_fifo_timeout(struct pxa_camera_dev *pcdev,
+ unsigned long pclk)
+{
+ /* We want a timeout > 1 pixel time, not ">=" */
+ u32 ciclk_per_pixel = pcdev->ciclk / pclk + 1;
+
+ __raw_writel(ciclk_per_pixel, pcdev->base + CITOR);
+}
+
+static void pxa_camera_activate(struct pxa_camera_dev *pcdev)
+{
+ u32 cicr4 = 0;
+
+ /* disable all interrupts */
+ __raw_writel(0x3ff, pcdev->base + CICR0);
+
+ if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
+ cicr4 |= CICR4_PCLK_EN;
+ if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
+ cicr4 |= CICR4_MCLK_EN;
+ if (pcdev->platform_flags & PXA_CAMERA_PCP)
+ cicr4 |= CICR4_PCP;
+ if (pcdev->platform_flags & PXA_CAMERA_HSP)
+ cicr4 |= CICR4_HSP;
+ if (pcdev->platform_flags & PXA_CAMERA_VSP)
+ cicr4 |= CICR4_VSP;
+
+ __raw_writel(pcdev->mclk_divisor | cicr4, pcdev->base + CICR4);
+
+ if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
+ /* Initialise the timeout under the assumption pclk = mclk */
+ recalculate_fifo_timeout(pcdev, pcdev->mclk);
+ else
+ /* "Safe default" - 13MHz */
+ recalculate_fifo_timeout(pcdev, 13000000);
+
+ clk_prepare_enable(pcdev->clk);
+}
+
+static void pxa_camera_deactivate(struct pxa_camera_dev *pcdev)
+{
+ clk_disable_unprepare(pcdev->clk);
+}
+
+static irqreturn_t pxa_camera_irq(int irq, void *data)
+{
+ struct pxa_camera_dev *pcdev = data;
+ unsigned long status, cifr, cicr0;
+ struct pxa_buffer *buf;
+ struct videobuf_buffer *vb;
+
+ status = __raw_readl(pcdev->base + CISR);
+ dev_dbg(pcdev->soc_host.v4l2_dev.dev,
+ "Camera interrupt status 0x%lx\n", status);
+
+ if (!status)
+ return IRQ_NONE;
+
+ __raw_writel(status, pcdev->base + CISR);
+
+ if (status & CISR_EOF) {
+ /* Reset the FIFOs */
+ cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F;
+ __raw_writel(cifr, pcdev->base + CIFR);
+
+ pcdev->active = list_first_entry(&pcdev->capture,
+ struct pxa_buffer, vb.queue);
+ vb = &pcdev->active->vb;
+ buf = container_of(vb, struct pxa_buffer, vb);
+ pxa_videobuf_set_actdma(pcdev, buf);
+
+ pxa_dma_start_channels(pcdev);
+
+ cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_EOFM;
+ __raw_writel(cicr0, pcdev->base + CICR0);
+ }
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * The following two functions absolutely depend on the fact, that
+ * there can be only one camera on PXA quick capture interface
+ * Called with .video_lock held
+ */
+static int pxa_camera_add_device(struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct pxa_camera_dev *pcdev = ici->priv;
+
+ if (pcdev->icd)
+ return -EBUSY;
+
+ pxa_camera_activate(pcdev);
+
+ pcdev->icd = icd;
+
+ dev_info(icd->parent, "PXA Camera driver attached to camera %d\n",
+ icd->devnum);
+
+ return 0;
+}
+
+/* Called with .video_lock held */
+static void pxa_camera_remove_device(struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct pxa_camera_dev *pcdev = ici->priv;
+
+ BUG_ON(icd != pcdev->icd);
+
+ dev_info(icd->parent, "PXA Camera driver detached from camera %d\n",
+ icd->devnum);
+
+ /* disable capture, disable interrupts */
+ __raw_writel(0x3ff, pcdev->base + CICR0);
+
+ /* Stop DMA engine */
+ DCSR(pcdev->dma_chans[0]) = 0;
+ DCSR(pcdev->dma_chans[1]) = 0;
+ DCSR(pcdev->dma_chans[2]) = 0;
+
+ pxa_camera_deactivate(pcdev);
+
+ pcdev->icd = NULL;
+}
+
+static int test_platform_param(struct pxa_camera_dev *pcdev,
+ unsigned char buswidth, unsigned long *flags)
+{
+ /*
+ * Platform specified synchronization and pixel clock polarities are
+ * only a recommendation and are only used during probing. The PXA270
+ * quick capture interface supports both.
+ */
+ *flags = (pcdev->platform_flags & PXA_CAMERA_MASTER ?
+ V4L2_MBUS_MASTER : V4L2_MBUS_SLAVE) |
+ V4L2_MBUS_HSYNC_ACTIVE_HIGH |
+ V4L2_MBUS_HSYNC_ACTIVE_LOW |
+ V4L2_MBUS_VSYNC_ACTIVE_HIGH |
+ V4L2_MBUS_VSYNC_ACTIVE_LOW |
+ V4L2_MBUS_DATA_ACTIVE_HIGH |
+ V4L2_MBUS_PCLK_SAMPLE_RISING |
+ V4L2_MBUS_PCLK_SAMPLE_FALLING;
+
+ /* If requested data width is supported by the platform, use it */
+ if ((1 << (buswidth - 1)) & pcdev->width_flags)
+ return 0;
+
+ return -EINVAL;
+}
+
+static void pxa_camera_setup_cicr(struct soc_camera_device *icd,
+ unsigned long flags, __u32 pixfmt)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct pxa_camera_dev *pcdev = ici->priv;
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ unsigned long dw, bpp;
+ u32 cicr0, cicr1, cicr2, cicr3, cicr4 = 0, y_skip_top;
+ int ret = v4l2_subdev_call(sd, sensor, g_skip_top_lines, &y_skip_top);
+
+ if (ret < 0)
+ y_skip_top = 0;
+
+ /*
+ * Datawidth is now guaranteed to be equal to one of the three values.
+ * We fix bit-per-pixel equal to data-width...
+ */
+ switch (icd->current_fmt->host_fmt->bits_per_sample) {
+ case 10:
+ dw = 4;
+ bpp = 0x40;
+ break;
+ case 9:
+ dw = 3;
+ bpp = 0x20;
+ break;
+ default:
+ /*
+ * Actually it can only be 8 now,
+ * default is just to silence compiler warnings
+ */
+ case 8:
+ dw = 2;
+ bpp = 0;
+ }
+
+ if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
+ cicr4 |= CICR4_PCLK_EN;
+ if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
+ cicr4 |= CICR4_MCLK_EN;
+ if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
+ cicr4 |= CICR4_PCP;
+ if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
+ cicr4 |= CICR4_HSP;
+ if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
+ cicr4 |= CICR4_VSP;
+
+ cicr0 = __raw_readl(pcdev->base + CICR0);
+ if (cicr0 & CICR0_ENB)
+ __raw_writel(cicr0 & ~CICR0_ENB, pcdev->base + CICR0);
+
+ cicr1 = CICR1_PPL_VAL(icd->user_width - 1) | bpp | dw;
+
+ switch (pixfmt) {
+ case V4L2_PIX_FMT_YUV422P:
+ pcdev->channels = 3;
+ cicr1 |= CICR1_YCBCR_F;
+ /*
+ * Normally, pxa bus wants as input UYVY format. We allow all
+ * reorderings of the YUV422 format, as no processing is done,
+ * and the YUV stream is just passed through without any
+ * transformation. Note that UYVY is the only format that
+ * should be used if pxa framebuffer Overlay2 is used.
+ */
+ case V4L2_PIX_FMT_UYVY:
+ case V4L2_PIX_FMT_VYUY:
+ case V4L2_PIX_FMT_YUYV:
+ case V4L2_PIX_FMT_YVYU:
+ cicr1 |= CICR1_COLOR_SP_VAL(2);
+ break;
+ case V4L2_PIX_FMT_RGB555:
+ cicr1 |= CICR1_RGB_BPP_VAL(1) | CICR1_RGBT_CONV_VAL(2) |
+ CICR1_TBIT | CICR1_COLOR_SP_VAL(1);
+ break;
+ case V4L2_PIX_FMT_RGB565:
+ cicr1 |= CICR1_COLOR_SP_VAL(1) | CICR1_RGB_BPP_VAL(2);
+ break;
+ }
+
+ cicr2 = 0;
+ cicr3 = CICR3_LPF_VAL(icd->user_height - 1) |
+ CICR3_BFW_VAL(min((u32)255, y_skip_top));
+ cicr4 |= pcdev->mclk_divisor;
+
+ __raw_writel(cicr1, pcdev->base + CICR1);
+ __raw_writel(cicr2, pcdev->base + CICR2);
+ __raw_writel(cicr3, pcdev->base + CICR3);
+ __raw_writel(cicr4, pcdev->base + CICR4);
+
+ /* CIF interrupts are not used, only DMA */
+ cicr0 = (cicr0 & CICR0_ENB) | (pcdev->platform_flags & PXA_CAMERA_MASTER ?
+ CICR0_SIM_MP : (CICR0_SL_CAP_EN | CICR0_SIM_SP));
+ cicr0 |= CICR0_DMAEN | CICR0_IRQ_MASK;
+ __raw_writel(cicr0, pcdev->base + CICR0);
+}
+
+static int pxa_camera_set_bus_param(struct soc_camera_device *icd)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct pxa_camera_dev *pcdev = ici->priv;
+ struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
+ u32 pixfmt = icd->current_fmt->host_fmt->fourcc;
+ unsigned long bus_flags, common_flags;
+ int ret;
+ struct pxa_cam *cam = icd->host_priv;
+
+ ret = test_platform_param(pcdev, icd->current_fmt->host_fmt->bits_per_sample,
+ &bus_flags);
+ if (ret < 0)
+ return ret;
+
+ ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
+ if (!ret) {
+ common_flags = soc_mbus_config_compatible(&cfg,
+ bus_flags);
+ if (!common_flags) {
+ dev_warn(icd->parent,
+ "Flags incompatible: camera 0x%x, host 0x%lx\n",
+ cfg.flags, bus_flags);
+ return -EINVAL;
+ }
+ } else if (ret != -ENOIOCTLCMD) {
+ return ret;
+ } else {
+ common_flags = bus_flags;
+ }
+
+ pcdev->channels = 1;
+
+ /* Make choises, based on platform preferences */
+ if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
+ (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
+ if (pcdev->platform_flags & PXA_CAMERA_HSP)
+ common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
+ else
+ common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
+ }
+
+ if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
+ (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
+ if (pcdev->platform_flags & PXA_CAMERA_VSP)
+ common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
+ else
+ common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
+ }
+
+ if ((common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) &&
+ (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)) {
+ if (pcdev->platform_flags & PXA_CAMERA_PCP)
+ common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_RISING;
+ else
+ common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_FALLING;
+ }
+
+ cfg.flags = common_flags;
+ ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
+ if (ret < 0 && ret != -ENOIOCTLCMD) {
+ dev_dbg(icd->parent, "camera s_mbus_config(0x%lx) returned %d\n",
+ common_flags, ret);
+ return ret;
+ }
+
+ cam->flags = common_flags;
+
+ pxa_camera_setup_cicr(icd, common_flags, pixfmt);
+
+ return 0;
+}
+
+static int pxa_camera_try_bus_param(struct soc_camera_device *icd,
+ unsigned char buswidth)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct pxa_camera_dev *pcdev = ici->priv;
+ struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
+ unsigned long bus_flags, common_flags;
+ int ret = test_platform_param(pcdev, buswidth, &bus_flags);
+
+ if (ret < 0)
+ return ret;
+
+ ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
+ if (!ret) {
+ common_flags = soc_mbus_config_compatible(&cfg,
+ bus_flags);
+ if (!common_flags) {
+ dev_warn(icd->parent,
+ "Flags incompatible: camera 0x%x, host 0x%lx\n",
+ cfg.flags, bus_flags);
+ return -EINVAL;
+ }
+ } else if (ret == -ENOIOCTLCMD) {
+ ret = 0;
+ }
+
+ return ret;
+}
+
+static const struct soc_mbus_pixelfmt pxa_camera_formats[] = {
+ {
+ .fourcc = V4L2_PIX_FMT_YUV422P,
+ .name = "Planar YUV422 16 bit",
+ .bits_per_sample = 8,
+ .packing = SOC_MBUS_PACKING_2X8_PADHI,
+ .order = SOC_MBUS_ORDER_LE,
+ .layout = SOC_MBUS_LAYOUT_PLANAR_2Y_U_V,
+ },
+};
+
+/* This will be corrected as we get more formats */
+static bool pxa_camera_packing_supported(const struct soc_mbus_pixelfmt *fmt)
+{
+ return fmt->packing == SOC_MBUS_PACKING_NONE ||
+ (fmt->bits_per_sample == 8 &&
+ fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
+ (fmt->bits_per_sample > 8 &&
+ fmt->packing == SOC_MBUS_PACKING_EXTEND16);
+}
+
+static int pxa_camera_get_formats(struct soc_camera_device *icd, unsigned int idx,
+ struct soc_camera_format_xlate *xlate)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ struct device *dev = icd->parent;
+ int formats = 0, ret;
+ struct pxa_cam *cam;
+ enum v4l2_mbus_pixelcode code;
+ const struct soc_mbus_pixelfmt *fmt;
+
+ ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
+ if (ret < 0)
+ /* No more formats */
+ return 0;
+
+ fmt = soc_mbus_get_fmtdesc(code);
+ if (!fmt) {
+ dev_err(dev, "Invalid format code #%u: %d\n", idx, code);
+ return 0;
+ }
+
+ /* This also checks support for the requested bits-per-sample */
+ ret = pxa_camera_try_bus_param(icd, fmt->bits_per_sample);
+ if (ret < 0)
+ return 0;
+
+ if (!icd->host_priv) {
+ cam = kzalloc(sizeof(*cam), GFP_KERNEL);
+ if (!cam)
+ return -ENOMEM;
+
+ icd->host_priv = cam;
+ } else {
+ cam = icd->host_priv;
+ }
+
+ switch (code) {
+ case V4L2_MBUS_FMT_UYVY8_2X8:
+ formats++;
+ if (xlate) {
+ xlate->host_fmt = &pxa_camera_formats[0];
+ xlate->code = code;
+ xlate++;
+ dev_dbg(dev, "Providing format %s using code %d\n",
+ pxa_camera_formats[0].name, code);
+ }
+ case V4L2_MBUS_FMT_VYUY8_2X8:
+ case V4L2_MBUS_FMT_YUYV8_2X8:
+ case V4L2_MBUS_FMT_YVYU8_2X8:
+ case V4L2_MBUS_FMT_RGB565_2X8_LE:
+ case V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE:
+ if (xlate)
+ dev_dbg(dev, "Providing format %s packed\n",
+ fmt->name);
+ break;
+ default:
+ if (!pxa_camera_packing_supported(fmt))
+ return 0;
+ if (xlate)
+ dev_dbg(dev,
+ "Providing format %s in pass-through mode\n",
+ fmt->name);
+ }
+
+ /* Generic pass-through */
+ formats++;
+ if (xlate) {
+ xlate->host_fmt = fmt;
+ xlate->code = code;
+ xlate++;
+ }
+
+ return formats;
+}
+
+static void pxa_camera_put_formats(struct soc_camera_device *icd)
+{
+ kfree(icd->host_priv);
+ icd->host_priv = NULL;
+}
+
+static int pxa_camera_check_frame(u32 width, u32 height)
+{
+ /* limit to pxa hardware capabilities */
+ return height < 32 || height > 2048 || width < 48 || width > 2048 ||
+ (width & 0x01);
+}
+
+static int pxa_camera_set_crop(struct soc_camera_device *icd,
+ struct v4l2_crop *a)
+{
+ struct v4l2_rect *rect = &a->c;
+ struct device *dev = icd->parent;
+ struct soc_camera_host *ici = to_soc_camera_host(dev);
+ struct pxa_camera_dev *pcdev = ici->priv;
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ struct soc_camera_sense sense = {
+ .master_clock = pcdev->mclk,
+ .pixel_clock_max = pcdev->ciclk / 4,
+ };
+ struct v4l2_mbus_framefmt mf;
+ struct pxa_cam *cam = icd->host_priv;
+ u32 fourcc = icd->current_fmt->host_fmt->fourcc;
+ int ret;
+
+ /* If PCLK is used to latch data from the sensor, check sense */
+ if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
+ icd->sense = &sense;
+
+ ret = v4l2_subdev_call(sd, video, s_crop, a);
+
+ icd->sense = NULL;
+
+ if (ret < 0) {
+ dev_warn(dev, "Failed to crop to %ux%u@%u:%u\n",
+ rect->width, rect->height, rect->left, rect->top);
+ return ret;
+ }
+
+ ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
+ if (ret < 0)
+ return ret;
+
+ if (pxa_camera_check_frame(mf.width, mf.height)) {
+ /*
+ * Camera cropping produced a frame beyond our capabilities.
+ * FIXME: just extract a subframe, that we can process.
+ */
+ v4l_bound_align_image(&mf.width, 48, 2048, 1,
+ &mf.height, 32, 2048, 0,
+ fourcc == V4L2_PIX_FMT_YUV422P ? 4 : 0);
+ ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf);
+ if (ret < 0)
+ return ret;
+
+ if (pxa_camera_check_frame(mf.width, mf.height)) {
+ dev_warn(icd->parent,
+ "Inconsistent state. Use S_FMT to repair\n");
+ return -EINVAL;
+ }
+ }
+
+ if (sense.flags & SOCAM_SENSE_PCLK_CHANGED) {
+ if (sense.pixel_clock > sense.pixel_clock_max) {
+ dev_err(dev,
+ "pixel clock %lu set by the camera too high!",
+ sense.pixel_clock);
+ return -EIO;
+ }
+ recalculate_fifo_timeout(pcdev, sense.pixel_clock);
+ }
+
+ icd->user_width = mf.width;
+ icd->user_height = mf.height;
+
+ pxa_camera_setup_cicr(icd, cam->flags, fourcc);
+
+ return ret;
+}
+
+static int pxa_camera_set_fmt(struct soc_camera_device *icd,
+ struct v4l2_format *f)
+{
+ struct device *dev = icd->parent;
+ struct soc_camera_host *ici = to_soc_camera_host(dev);
+ struct pxa_camera_dev *pcdev = ici->priv;
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ const struct soc_camera_format_xlate *xlate = NULL;
+ struct soc_camera_sense sense = {
+ .master_clock = pcdev->mclk,
+ .pixel_clock_max = pcdev->ciclk / 4,
+ };
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct v4l2_mbus_framefmt mf;
+ int ret;
+
+ xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
+ if (!xlate) {
+ dev_warn(dev, "Format %x not found\n", pix->pixelformat);
+ return -EINVAL;
+ }
+
+ /* If PCLK is used to latch data from the sensor, check sense */
+ if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
+ /* The caller holds a mutex. */
+ icd->sense = &sense;
+
+ mf.width = pix->width;
+ mf.height = pix->height;
+ mf.field = pix->field;
+ mf.colorspace = pix->colorspace;
+ mf.code = xlate->code;
+
+ ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf);
+
+ if (mf.code != xlate->code)
+ return -EINVAL;
+
+ icd->sense = NULL;
+
+ if (ret < 0) {
+ dev_warn(dev, "Failed to configure for format %x\n",
+ pix->pixelformat);
+ } else if (pxa_camera_check_frame(mf.width, mf.height)) {
+ dev_warn(dev,
+ "Camera driver produced an unsupported frame %dx%d\n",
+ mf.width, mf.height);
+ ret = -EINVAL;
+ } else if (sense.flags & SOCAM_SENSE_PCLK_CHANGED) {
+ if (sense.pixel_clock > sense.pixel_clock_max) {
+ dev_err(dev,
+ "pixel clock %lu set by the camera too high!",
+ sense.pixel_clock);
+ return -EIO;
+ }
+ recalculate_fifo_timeout(pcdev, sense.pixel_clock);
+ }
+
+ if (ret < 0)
+ return ret;
+
+ pix->width = mf.width;
+ pix->height = mf.height;
+ pix->field = mf.field;
+ pix->colorspace = mf.colorspace;
+ icd->current_fmt = xlate;
+
+ return ret;
+}
+
+static int pxa_camera_try_fmt(struct soc_camera_device *icd,
+ struct v4l2_format *f)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ const struct soc_camera_format_xlate *xlate;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct v4l2_mbus_framefmt mf;
+ __u32 pixfmt = pix->pixelformat;
+ int ret;
+
+ xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
+ if (!xlate) {
+ dev_warn(icd->parent, "Format %x not found\n", pixfmt);
+ return -EINVAL;
+ }
+
+ /*
+ * Limit to pxa hardware capabilities. YUV422P planar format requires
+ * images size to be a multiple of 16 bytes. If not, zeros will be
+ * inserted between Y and U planes, and U and V planes, which violates
+ * the YUV422P standard.
+ */
+ v4l_bound_align_image(&pix->width, 48, 2048, 1,
+ &pix->height, 32, 2048, 0,
+ pixfmt == V4L2_PIX_FMT_YUV422P ? 4 : 0);
+
+ /* limit to sensor capabilities */
+ mf.width = pix->width;
+ mf.height = pix->height;
+ /* Only progressive video supported so far */
+ mf.field = V4L2_FIELD_NONE;
+ mf.colorspace = pix->colorspace;
+ mf.code = xlate->code;
+
+ ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf);
+ if (ret < 0)
+ return ret;
+
+ pix->width = mf.width;
+ pix->height = mf.height;
+ pix->colorspace = mf.colorspace;
+
+ switch (mf.field) {
+ case V4L2_FIELD_ANY:
+ case V4L2_FIELD_NONE:
+ pix->field = V4L2_FIELD_NONE;
+ break;
+ default:
+ /* TODO: support interlaced at least in pass-through mode */
+ dev_err(icd->parent, "Field type %d unsupported.\n",
+ mf.field);
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int pxa_camera_reqbufs(struct soc_camera_device *icd,
+ struct v4l2_requestbuffers *p)
+{
+ int i;
+
+ /*
+ * This is for locking debugging only. I removed spinlocks and now I
+ * check whether .prepare is ever called on a linked buffer, or whether
+ * a dma IRQ can occur for an in-work or unlinked buffer. Until now
+ * it hadn't triggered
+ */
+ for (i = 0; i < p->count; i++) {
+ struct pxa_buffer *buf = container_of(icd->vb_vidq.bufs[i],
+ struct pxa_buffer, vb);
+ buf->inwork = 0;
+ INIT_LIST_HEAD(&buf->vb.queue);
+ }
+
+ return 0;
+}
+
+static unsigned int pxa_camera_poll(struct file *file, poll_table *pt)
+{
+ struct soc_camera_device *icd = file->private_data;
+ struct pxa_buffer *buf;
+
+ buf = list_entry(icd->vb_vidq.stream.next, struct pxa_buffer,
+ vb.stream);
+
+ poll_wait(file, &buf->vb.done, pt);
+
+ if (buf->vb.state == VIDEOBUF_DONE ||
+ buf->vb.state == VIDEOBUF_ERROR)
+ return POLLIN|POLLRDNORM;
+
+ return 0;
+}
+
+static int pxa_camera_querycap(struct soc_camera_host *ici,
+ struct v4l2_capability *cap)
+{
+ /* cap->name is set by the firendly caller:-> */
+ strlcpy(cap->card, pxa_cam_driver_description, sizeof(cap->card));
+ cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
+
+ return 0;
+}
+
+static int pxa_camera_suspend(struct device *dev)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(dev);
+ struct pxa_camera_dev *pcdev = ici->priv;
+ int i = 0, ret = 0;
+
+ pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR0);
+ pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR1);
+ pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR2);
+ pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR3);
+ pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR4);
+
+ if (pcdev->icd) {
+ struct v4l2_subdev *sd = soc_camera_to_subdev(pcdev->icd);
+ ret = v4l2_subdev_call(sd, core, s_power, 0);
+ if (ret == -ENOIOCTLCMD)
+ ret = 0;
+ }
+
+ return ret;
+}
+
+static int pxa_camera_resume(struct device *dev)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(dev);
+ struct pxa_camera_dev *pcdev = ici->priv;
+ int i = 0, ret = 0;
+
+ DRCMR(68) = pcdev->dma_chans[0] | DRCMR_MAPVLD;
+ DRCMR(69) = pcdev->dma_chans[1] | DRCMR_MAPVLD;
+ DRCMR(70) = pcdev->dma_chans[2] | DRCMR_MAPVLD;
+
+ __raw_writel(pcdev->save_cicr[i++] & ~CICR0_ENB, pcdev->base + CICR0);
+ __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR1);
+ __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR2);
+ __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR3);
+ __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR4);
+
+ if (pcdev->icd) {
+ struct v4l2_subdev *sd = soc_camera_to_subdev(pcdev->icd);
+ ret = v4l2_subdev_call(sd, core, s_power, 1);
+ if (ret == -ENOIOCTLCMD)
+ ret = 0;
+ }
+
+ /* Restart frame capture if active buffer exists */
+ if (!ret && pcdev->active)
+ pxa_camera_start_capture(pcdev);
+
+ return ret;
+}
+
+static struct soc_camera_host_ops pxa_soc_camera_host_ops = {
+ .owner = THIS_MODULE,
+ .add = pxa_camera_add_device,
+ .remove = pxa_camera_remove_device,
+ .set_crop = pxa_camera_set_crop,
+ .get_formats = pxa_camera_get_formats,
+ .put_formats = pxa_camera_put_formats,
+ .set_fmt = pxa_camera_set_fmt,
+ .try_fmt = pxa_camera_try_fmt,
+ .init_videobuf = pxa_camera_init_videobuf,
+ .reqbufs = pxa_camera_reqbufs,
+ .poll = pxa_camera_poll,
+ .querycap = pxa_camera_querycap,
+ .set_bus_param = pxa_camera_set_bus_param,
+};
+
+static int __devinit pxa_camera_probe(struct platform_device *pdev)
+{
+ struct pxa_camera_dev *pcdev;
+ struct resource *res;
+ void __iomem *base;
+ int irq;
+ int err = 0;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ irq = platform_get_irq(pdev, 0);
+ if (!res || irq < 0) {
+ err = -ENODEV;
+ goto exit;
+ }
+
+ pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
+ if (!pcdev) {
+ dev_err(&pdev->dev, "Could not allocate pcdev\n");
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ pcdev->clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(pcdev->clk)) {
+ err = PTR_ERR(pcdev->clk);
+ goto exit_kfree;
+ }
+
+ pcdev->res = res;
+
+ pcdev->pdata = pdev->dev.platform_data;
+ pcdev->platform_flags = pcdev->pdata->flags;
+ if (!(pcdev->platform_flags & (PXA_CAMERA_DATAWIDTH_8 |
+ PXA_CAMERA_DATAWIDTH_9 | PXA_CAMERA_DATAWIDTH_10))) {
+ /*
+ * Platform hasn't set available data widths. This is bad.
+ * Warn and use a default.
+ */
+ dev_warn(&pdev->dev, "WARNING! Platform hasn't set available "
+ "data widths, using default 10 bit\n");
+ pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_10;
+ }
+ if (pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_8)
+ pcdev->width_flags = 1 << 7;
+ if (pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_9)
+ pcdev->width_flags |= 1 << 8;
+ if (pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_10)
+ pcdev->width_flags |= 1 << 9;
+ pcdev->mclk = pcdev->pdata->mclk_10khz * 10000;
+ if (!pcdev->mclk) {
+ dev_warn(&pdev->dev,
+ "mclk == 0! Please, fix your platform data. "
+ "Using default 20MHz\n");
+ pcdev->mclk = 20000000;
+ }
+
+ pcdev->mclk_divisor = mclk_get_divisor(pdev, pcdev);
+
+ INIT_LIST_HEAD(&pcdev->capture);
+ spin_lock_init(&pcdev->lock);
+
+ /*
+ * Request the regions.
+ */
+ if (!request_mem_region(res->start, resource_size(res),
+ PXA_CAM_DRV_NAME)) {
+ err = -EBUSY;
+ goto exit_clk;
+ }
+
+ base = ioremap(res->start, resource_size(res));
+ if (!base) {
+ err = -ENOMEM;
+ goto exit_release;
+ }
+ pcdev->irq = irq;
+ pcdev->base = base;
+
+ /* request dma */
+ err = pxa_request_dma("CI_Y", DMA_PRIO_HIGH,
+ pxa_camera_dma_irq_y, pcdev);
+ if (err < 0) {
+ dev_err(&pdev->dev, "Can't request DMA for Y\n");
+ goto exit_iounmap;
+ }
+ pcdev->dma_chans[0] = err;
+ dev_dbg(&pdev->dev, "got DMA channel %d\n", pcdev->dma_chans[0]);
+
+ err = pxa_request_dma("CI_U", DMA_PRIO_HIGH,
+ pxa_camera_dma_irq_u, pcdev);
+ if (err < 0) {
+ dev_err(&pdev->dev, "Can't request DMA for U\n");
+ goto exit_free_dma_y;
+ }
+ pcdev->dma_chans[1] = err;
+ dev_dbg(&pdev->dev, "got DMA channel (U) %d\n", pcdev->dma_chans[1]);
+
+ err = pxa_request_dma("CI_V", DMA_PRIO_HIGH,
+ pxa_camera_dma_irq_v, pcdev);
+ if (err < 0) {
+ dev_err(&pdev->dev, "Can't request DMA for V\n");
+ goto exit_free_dma_u;
+ }
+ pcdev->dma_chans[2] = err;
+ dev_dbg(&pdev->dev, "got DMA channel (V) %d\n", pcdev->dma_chans[2]);
+
+ DRCMR(68) = pcdev->dma_chans[0] | DRCMR_MAPVLD;
+ DRCMR(69) = pcdev->dma_chans[1] | DRCMR_MAPVLD;
+ DRCMR(70) = pcdev->dma_chans[2] | DRCMR_MAPVLD;
+
+ /* request irq */
+ err = request_irq(pcdev->irq, pxa_camera_irq, 0, PXA_CAM_DRV_NAME,
+ pcdev);
+ if (err) {
+ dev_err(&pdev->dev, "Camera interrupt register failed \n");
+ goto exit_free_dma;
+ }
+
+ pcdev->soc_host.drv_name = PXA_CAM_DRV_NAME;
+ pcdev->soc_host.ops = &pxa_soc_camera_host_ops;
+ pcdev->soc_host.priv = pcdev;
+ pcdev->soc_host.v4l2_dev.dev = &pdev->dev;
+ pcdev->soc_host.nr = pdev->id;
+
+ err = soc_camera_host_register(&pcdev->soc_host);
+ if (err)
+ goto exit_free_irq;
+
+ return 0;
+
+exit_free_irq:
+ free_irq(pcdev->irq, pcdev);
+exit_free_dma:
+ pxa_free_dma(pcdev->dma_chans[2]);
+exit_free_dma_u:
+ pxa_free_dma(pcdev->dma_chans[1]);
+exit_free_dma_y:
+ pxa_free_dma(pcdev->dma_chans[0]);
+exit_iounmap:
+ iounmap(base);
+exit_release:
+ release_mem_region(res->start, resource_size(res));
+exit_clk:
+ clk_put(pcdev->clk);
+exit_kfree:
+ kfree(pcdev);
+exit:
+ return err;
+}
+
+static int __devexit pxa_camera_remove(struct platform_device *pdev)
+{
+ struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
+ struct pxa_camera_dev *pcdev = container_of(soc_host,
+ struct pxa_camera_dev, soc_host);
+ struct resource *res;
+
+ clk_put(pcdev->clk);
+
+ pxa_free_dma(pcdev->dma_chans[0]);
+ pxa_free_dma(pcdev->dma_chans[1]);
+ pxa_free_dma(pcdev->dma_chans[2]);
+ free_irq(pcdev->irq, pcdev);
+
+ soc_camera_host_unregister(soc_host);
+
+ iounmap(pcdev->base);
+
+ res = pcdev->res;
+ release_mem_region(res->start, resource_size(res));
+
+ kfree(pcdev);
+
+ dev_info(&pdev->dev, "PXA Camera driver unloaded\n");
+
+ return 0;
+}
+
+static struct dev_pm_ops pxa_camera_pm = {
+ .suspend = pxa_camera_suspend,
+ .resume = pxa_camera_resume,
+};
+
+static struct platform_driver pxa_camera_driver = {
+ .driver = {
+ .name = PXA_CAM_DRV_NAME,
+ .pm = &pxa_camera_pm,
+ },
+ .probe = pxa_camera_probe,
+ .remove = __devexit_p(pxa_camera_remove),
+};
+
+module_platform_driver(pxa_camera_driver);
+
+MODULE_DESCRIPTION("PXA27x SoC Camera Host driver");
+MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(PXA_CAM_VERSION);
+MODULE_ALIAS("platform:" PXA_CAM_DRV_NAME);
projects / cascardo / linux.git / commitdiff