2 * TI OMAP4 ISS V4L2 Driver - ISP IPIPE module
4 * Copyright (C) 2012 Texas Instruments, Inc.
6 * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
14 #include <linux/module.h>
15 #include <linux/uaccess.h>
16 #include <linux/delay.h>
17 #include <linux/device.h>
18 #include <linux/dma-mapping.h>
20 #include <linux/sched.h>
24 #include "iss_ipipe.h"
26 static struct v4l2_mbus_framefmt *
27 __ipipe_get_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_fh *fh,
28 unsigned int pad, enum v4l2_subdev_format_whence which);
30 static const unsigned int ipipe_fmts[] = {
31 MEDIA_BUS_FMT_SGRBG10_1X10,
32 MEDIA_BUS_FMT_SRGGB10_1X10,
33 MEDIA_BUS_FMT_SBGGR10_1X10,
34 MEDIA_BUS_FMT_SGBRG10_1X10,
38 * ipipe_print_status - Print current IPIPE Module register values.
39 * @ipipe: Pointer to ISS ISP IPIPE device.
41 * Also prints other debug information stored in the IPIPE module.
43 #define IPIPE_PRINT_REGISTER(iss, name)\
44 dev_dbg(iss->dev, "###IPIPE " #name "=0x%08x\n", \
45 iss_reg_read(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_##name))
47 static void ipipe_print_status(struct iss_ipipe_device *ipipe)
49 struct iss_device *iss = to_iss_device(ipipe);
51 dev_dbg(iss->dev, "-------------IPIPE Register dump-------------\n");
53 IPIPE_PRINT_REGISTER(iss, SRC_EN);
54 IPIPE_PRINT_REGISTER(iss, SRC_MODE);
55 IPIPE_PRINT_REGISTER(iss, SRC_FMT);
56 IPIPE_PRINT_REGISTER(iss, SRC_COL);
57 IPIPE_PRINT_REGISTER(iss, SRC_VPS);
58 IPIPE_PRINT_REGISTER(iss, SRC_VSZ);
59 IPIPE_PRINT_REGISTER(iss, SRC_HPS);
60 IPIPE_PRINT_REGISTER(iss, SRC_HSZ);
61 IPIPE_PRINT_REGISTER(iss, GCK_MMR);
62 IPIPE_PRINT_REGISTER(iss, YUV_PHS);
64 dev_dbg(iss->dev, "-----------------------------------------------\n");
68 * ipipe_enable - Enable/Disable IPIPE.
69 * @enable: enable flag
72 static void ipipe_enable(struct iss_ipipe_device *ipipe, u8 enable)
74 struct iss_device *iss = to_iss_device(ipipe);
76 iss_reg_update(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_EN,
77 IPIPE_SRC_EN_EN, enable ? IPIPE_SRC_EN_EN : 0);
80 /* -----------------------------------------------------------------------------
81 * Format- and pipeline-related configuration helpers
84 static void ipipe_configure(struct iss_ipipe_device *ipipe)
86 struct iss_device *iss = to_iss_device(ipipe);
87 struct v4l2_mbus_framefmt *format;
90 format = &ipipe->formats[IPIPE_PAD_SINK];
92 /* NOTE: Currently just supporting pipeline IN: RGB, OUT: YUV422 */
93 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_FMT,
94 IPIPE_SRC_FMT_RAW2YUV);
96 /* Enable YUV444 -> YUV422 conversion */
97 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_YUV_PHS,
100 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_VPS, 0);
101 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_HPS, 0);
102 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_VSZ,
103 (format->height - 2) & IPIPE_SRC_VSZ_MASK);
104 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_HSZ,
105 (format->width - 1) & IPIPE_SRC_HSZ_MASK);
107 /* Ignore ipipeif_wrt signal, and operate on-the-fly. */
108 iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_MODE,
109 IPIPE_SRC_MODE_WRT | IPIPE_SRC_MODE_OST);
111 /* HACK: Values tuned for Ducati SW (OV) */
112 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_COL,
113 IPIPE_SRC_COL_EE_B | IPIPE_SRC_COL_EO_GB |
114 IPIPE_SRC_COL_OE_GR | IPIPE_SRC_COL_OO_R);
116 /* IPIPE_PAD_SOURCE_VP */
117 format = &ipipe->formats[IPIPE_PAD_SOURCE_VP];
121 /* -----------------------------------------------------------------------------
122 * V4L2 subdev operations
126 * ipipe_set_stream - Enable/Disable streaming on the IPIPE module
127 * @sd: ISP IPIPE V4L2 subdevice
128 * @enable: Enable/disable stream
130 static int ipipe_set_stream(struct v4l2_subdev *sd, int enable)
132 struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd);
133 struct iss_device *iss = to_iss_device(ipipe);
136 if (ipipe->state == ISS_PIPELINE_STREAM_STOPPED) {
137 if (enable == ISS_PIPELINE_STREAM_STOPPED)
140 omap4iss_isp_subclk_enable(iss, OMAP4_ISS_ISP_SUBCLK_IPIPE);
142 /* Enable clk_arm_g0 */
143 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_GCK_MMR,
146 /* Enable clk_pix_g[3:0] */
147 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_GCK_PIX,
148 IPIPE_GCK_PIX_G3 | IPIPE_GCK_PIX_G2 |
149 IPIPE_GCK_PIX_G1 | IPIPE_GCK_PIX_G0);
153 case ISS_PIPELINE_STREAM_CONTINUOUS:
155 ipipe_configure(ipipe);
156 ipipe_print_status(ipipe);
158 atomic_set(&ipipe->stopping, 0);
159 ipipe_enable(ipipe, 1);
162 case ISS_PIPELINE_STREAM_STOPPED:
163 if (ipipe->state == ISS_PIPELINE_STREAM_STOPPED)
165 if (omap4iss_module_sync_idle(&sd->entity, &ipipe->wait,
169 ipipe_enable(ipipe, 0);
170 omap4iss_isp_subclk_disable(iss, OMAP4_ISS_ISP_SUBCLK_IPIPE);
174 ipipe->state = enable;
178 static struct v4l2_mbus_framefmt *
179 __ipipe_get_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_fh *fh,
180 unsigned int pad, enum v4l2_subdev_format_whence which)
182 if (which == V4L2_SUBDEV_FORMAT_TRY)
183 return v4l2_subdev_get_try_format(fh, pad);
185 return &ipipe->formats[pad];
189 * ipipe_try_format - Try video format on a pad
190 * @ipipe: ISS IPIPE device
191 * @fh : V4L2 subdev file handle
196 ipipe_try_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_fh *fh,
197 unsigned int pad, struct v4l2_mbus_framefmt *fmt,
198 enum v4l2_subdev_format_whence which)
200 struct v4l2_mbus_framefmt *format;
201 unsigned int width = fmt->width;
202 unsigned int height = fmt->height;
207 for (i = 0; i < ARRAY_SIZE(ipipe_fmts); i++) {
208 if (fmt->code == ipipe_fmts[i])
212 /* If not found, use SGRBG10 as default */
213 if (i >= ARRAY_SIZE(ipipe_fmts))
214 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
216 /* Clamp the input size. */
217 fmt->width = clamp_t(u32, width, 1, 8192);
218 fmt->height = clamp_t(u32, height, 1, 8192);
219 fmt->colorspace = V4L2_COLORSPACE_SRGB;
222 case IPIPE_PAD_SOURCE_VP:
223 format = __ipipe_get_format(ipipe, fh, IPIPE_PAD_SINK, which);
224 memcpy(fmt, format, sizeof(*fmt));
226 fmt->code = MEDIA_BUS_FMT_UYVY8_1X16;
227 fmt->width = clamp_t(u32, width, 32, fmt->width);
228 fmt->height = clamp_t(u32, height, 32, fmt->height);
229 fmt->colorspace = V4L2_COLORSPACE_JPEG;
233 fmt->field = V4L2_FIELD_NONE;
237 * ipipe_enum_mbus_code - Handle pixel format enumeration
238 * @sd : pointer to v4l2 subdev structure
239 * @fh : V4L2 subdev file handle
240 * @code : pointer to v4l2_subdev_mbus_code_enum structure
241 * return -EINVAL or zero on success
243 static int ipipe_enum_mbus_code(struct v4l2_subdev *sd,
244 struct v4l2_subdev_fh *fh,
245 struct v4l2_subdev_mbus_code_enum *code)
249 if (code->index >= ARRAY_SIZE(ipipe_fmts))
252 code->code = ipipe_fmts[code->index];
255 case IPIPE_PAD_SOURCE_VP:
256 /* FIXME: Forced format conversion inside IPIPE ? */
257 if (code->index != 0)
260 code->code = MEDIA_BUS_FMT_UYVY8_1X16;
270 static int ipipe_enum_frame_size(struct v4l2_subdev *sd,
271 struct v4l2_subdev_fh *fh,
272 struct v4l2_subdev_frame_size_enum *fse)
274 struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd);
275 struct v4l2_mbus_framefmt format;
280 format.code = fse->code;
283 ipipe_try_format(ipipe, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY);
284 fse->min_width = format.width;
285 fse->min_height = format.height;
287 if (format.code != fse->code)
290 format.code = fse->code;
293 ipipe_try_format(ipipe, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY);
294 fse->max_width = format.width;
295 fse->max_height = format.height;
301 * ipipe_get_format - Retrieve the video format on a pad
302 * @sd : ISP IPIPE V4L2 subdevice
303 * @fh : V4L2 subdev file handle
306 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
307 * to the format type.
309 static int ipipe_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
310 struct v4l2_subdev_format *fmt)
312 struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd);
313 struct v4l2_mbus_framefmt *format;
315 format = __ipipe_get_format(ipipe, fh, fmt->pad, fmt->which);
319 fmt->format = *format;
324 * ipipe_set_format - Set the video format on a pad
325 * @sd : ISP IPIPE V4L2 subdevice
326 * @fh : V4L2 subdev file handle
329 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
330 * to the format type.
332 static int ipipe_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
333 struct v4l2_subdev_format *fmt)
335 struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd);
336 struct v4l2_mbus_framefmt *format;
338 format = __ipipe_get_format(ipipe, fh, fmt->pad, fmt->which);
342 ipipe_try_format(ipipe, fh, fmt->pad, &fmt->format, fmt->which);
343 *format = fmt->format;
345 /* Propagate the format from sink to source */
346 if (fmt->pad == IPIPE_PAD_SINK) {
347 format = __ipipe_get_format(ipipe, fh, IPIPE_PAD_SOURCE_VP,
349 *format = fmt->format;
350 ipipe_try_format(ipipe, fh, IPIPE_PAD_SOURCE_VP, format,
357 static int ipipe_link_validate(struct v4l2_subdev *sd, struct media_link *link,
358 struct v4l2_subdev_format *source_fmt,
359 struct v4l2_subdev_format *sink_fmt)
361 /* Check if the two ends match */
362 if (source_fmt->format.width != sink_fmt->format.width ||
363 source_fmt->format.height != sink_fmt->format.height)
366 if (source_fmt->format.code != sink_fmt->format.code)
373 * ipipe_init_formats - Initialize formats on all pads
374 * @sd: ISP IPIPE V4L2 subdevice
375 * @fh: V4L2 subdev file handle
377 * Initialize all pad formats with default values. If fh is not NULL, try
378 * formats are initialized on the file handle. Otherwise active formats are
379 * initialized on the device.
381 static int ipipe_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
383 struct v4l2_subdev_format format;
385 memset(&format, 0, sizeof(format));
386 format.pad = IPIPE_PAD_SINK;
387 format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
388 format.format.code = MEDIA_BUS_FMT_SGRBG10_1X10;
389 format.format.width = 4096;
390 format.format.height = 4096;
391 ipipe_set_format(sd, fh, &format);
396 /* V4L2 subdev video operations */
397 static const struct v4l2_subdev_video_ops ipipe_v4l2_video_ops = {
398 .s_stream = ipipe_set_stream,
401 /* V4L2 subdev pad operations */
402 static const struct v4l2_subdev_pad_ops ipipe_v4l2_pad_ops = {
403 .enum_mbus_code = ipipe_enum_mbus_code,
404 .enum_frame_size = ipipe_enum_frame_size,
405 .get_fmt = ipipe_get_format,
406 .set_fmt = ipipe_set_format,
407 .link_validate = ipipe_link_validate,
410 /* V4L2 subdev operations */
411 static const struct v4l2_subdev_ops ipipe_v4l2_ops = {
412 .video = &ipipe_v4l2_video_ops,
413 .pad = &ipipe_v4l2_pad_ops,
416 /* V4L2 subdev internal operations */
417 static const struct v4l2_subdev_internal_ops ipipe_v4l2_internal_ops = {
418 .open = ipipe_init_formats,
421 /* -----------------------------------------------------------------------------
422 * Media entity operations
426 * ipipe_link_setup - Setup IPIPE connections
427 * @entity: IPIPE media entity
428 * @local: Pad at the local end of the link
429 * @remote: Pad at the remote end of the link
432 * return -EINVAL or zero on success
434 static int ipipe_link_setup(struct media_entity *entity,
435 const struct media_pad *local,
436 const struct media_pad *remote, u32 flags)
438 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
439 struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd);
440 struct iss_device *iss = to_iss_device(ipipe);
442 switch (local->index | media_entity_type(remote->entity)) {
443 case IPIPE_PAD_SINK | MEDIA_ENT_T_V4L2_SUBDEV:
444 /* Read from IPIPEIF. */
445 if (!(flags & MEDIA_LNK_FL_ENABLED)) {
446 ipipe->input = IPIPE_INPUT_NONE;
450 if (ipipe->input != IPIPE_INPUT_NONE)
453 if (remote->entity == &iss->ipipeif.subdev.entity)
454 ipipe->input = IPIPE_INPUT_IPIPEIF;
458 case IPIPE_PAD_SOURCE_VP | MEDIA_ENT_T_V4L2_SUBDEV:
459 /* Send to RESIZER */
460 if (flags & MEDIA_LNK_FL_ENABLED) {
461 if (ipipe->output & ~IPIPE_OUTPUT_VP)
463 ipipe->output |= IPIPE_OUTPUT_VP;
465 ipipe->output &= ~IPIPE_OUTPUT_VP;
476 /* media operations */
477 static const struct media_entity_operations ipipe_media_ops = {
478 .link_setup = ipipe_link_setup,
479 .link_validate = v4l2_subdev_link_validate,
483 * ipipe_init_entities - Initialize V4L2 subdev and media entity
484 * @ipipe: ISS ISP IPIPE module
486 * Return 0 on success and a negative error code on failure.
488 static int ipipe_init_entities(struct iss_ipipe_device *ipipe)
490 struct v4l2_subdev *sd = &ipipe->subdev;
491 struct media_pad *pads = ipipe->pads;
492 struct media_entity *me = &sd->entity;
495 ipipe->input = IPIPE_INPUT_NONE;
497 v4l2_subdev_init(sd, &ipipe_v4l2_ops);
498 sd->internal_ops = &ipipe_v4l2_internal_ops;
499 strlcpy(sd->name, "OMAP4 ISS ISP IPIPE", sizeof(sd->name));
500 sd->grp_id = 1 << 16; /* group ID for iss subdevs */
501 v4l2_set_subdevdata(sd, ipipe);
502 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
504 pads[IPIPE_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
505 pads[IPIPE_PAD_SOURCE_VP].flags = MEDIA_PAD_FL_SOURCE;
507 me->ops = &ipipe_media_ops;
508 ret = media_entity_init(me, IPIPE_PADS_NUM, pads, 0);
512 ipipe_init_formats(sd, NULL);
517 void omap4iss_ipipe_unregister_entities(struct iss_ipipe_device *ipipe)
519 media_entity_cleanup(&ipipe->subdev.entity);
521 v4l2_device_unregister_subdev(&ipipe->subdev);
524 int omap4iss_ipipe_register_entities(struct iss_ipipe_device *ipipe,
525 struct v4l2_device *vdev)
529 /* Register the subdev and video node. */
530 ret = v4l2_device_register_subdev(vdev, &ipipe->subdev);
537 omap4iss_ipipe_unregister_entities(ipipe);
541 /* -----------------------------------------------------------------------------
542 * ISP IPIPE initialisation and cleanup
546 * omap4iss_ipipe_init - IPIPE module initialization.
547 * @iss: Device pointer specific to the OMAP4 ISS.
549 * TODO: Get the initialisation values from platform data.
551 * Return 0 on success or a negative error code otherwise.
553 int omap4iss_ipipe_init(struct iss_device *iss)
555 struct iss_ipipe_device *ipipe = &iss->ipipe;
557 ipipe->state = ISS_PIPELINE_STREAM_STOPPED;
558 init_waitqueue_head(&ipipe->wait);
560 return ipipe_init_entities(ipipe);
564 * omap4iss_ipipe_cleanup - IPIPE module cleanup.
565 * @iss: Device pointer specific to the OMAP4 ISS.
567 void omap4iss_ipipe_cleanup(struct iss_device *iss)
569 /* FIXME: are you sure there's nothing to do? */