2 * Support for NEC-nl8048hl11-01b panel driver
4 * Copyright (C) 2010 Texas Instruments Inc.
5 * Author: Erik Gilling <konkers@android.com>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published by
8 * the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program. If not, see <http://www.gnu.org/licenses/>.
19 #include <linux/module.h>
20 #include <linux/delay.h>
21 #include <linux/spi/spi.h>
23 #include <linux/gpio.h>
25 #include <video/omapdss.h>
26 #include <video/omap-panel-data.h>
31 * NEC PIX Clock Ratings
32 * MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz
34 #define LCD_PIXEL_CLOCK 23800
39 } nec_8048_init_seq[] = {
40 { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
41 { 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
42 { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 },
43 { 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
44 { 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F },
45 { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F },
46 { 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F },
47 { 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
48 { 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 },
49 { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C },
50 { 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
51 { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
52 { 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
53 { 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
54 { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
55 { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
56 { 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
57 { 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
61 * NEC NL8048HL11-01B Manual
62 * defines HFB, HSW, HBP, VFP, VSW, VBP as shown below
65 static struct omap_video_timings nec_8048_panel_timings = {
66 /* 800 x 480 @ 60 Hz Reduced blanking VESA CVT 0.31M3-R */
69 .pixel_clock = LCD_PIXEL_CLOCK,
77 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
78 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
79 .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
80 .de_level = OMAPDSS_SIG_ACTIVE_HIGH,
81 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
84 static inline struct panel_nec_nl8048_data
85 *get_panel_data(const struct omap_dss_device *dssdev)
87 return (struct panel_nec_nl8048_data *) dssdev->data;
90 static int nec_8048_panel_probe(struct omap_dss_device *dssdev)
92 struct panel_nec_nl8048_data *pd = get_panel_data(dssdev);
98 dssdev->panel.timings = nec_8048_panel_timings;
100 if (gpio_is_valid(pd->qvga_gpio)) {
101 r = devm_gpio_request_one(&dssdev->dev, pd->qvga_gpio,
102 GPIOF_OUT_INIT_HIGH, "lcd QVGA");
107 if (gpio_is_valid(pd->res_gpio)) {
108 r = devm_gpio_request_one(&dssdev->dev, pd->res_gpio,
109 GPIOF_OUT_INIT_LOW, "lcd RES");
117 static void nec_8048_panel_remove(struct omap_dss_device *dssdev)
121 static int nec_8048_panel_power_on(struct omap_dss_device *dssdev)
123 struct panel_nec_nl8048_data *pd = get_panel_data(dssdev);
126 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
129 omapdss_dpi_set_timings(dssdev, &dssdev->panel.timings);
130 omapdss_dpi_set_data_lines(dssdev, dssdev->phy.dpi.data_lines);
132 r = omapdss_dpi_display_enable(dssdev);
136 if (gpio_is_valid(pd->res_gpio))
137 gpio_set_value_cansleep(pd->res_gpio, 1);
145 static void nec_8048_panel_power_off(struct omap_dss_device *dssdev)
147 struct panel_nec_nl8048_data *pd = get_panel_data(dssdev);
149 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
152 if (gpio_is_valid(pd->res_gpio))
153 gpio_set_value_cansleep(pd->res_gpio, 0);
155 omapdss_dpi_display_disable(dssdev);
158 static int nec_8048_panel_enable(struct omap_dss_device *dssdev)
162 r = nec_8048_panel_power_on(dssdev);
166 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
171 static void nec_8048_panel_disable(struct omap_dss_device *dssdev)
173 nec_8048_panel_power_off(dssdev);
175 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
178 static int nec_8048_recommended_bpp(struct omap_dss_device *dssdev)
183 static struct omap_dss_driver nec_8048_driver = {
184 .probe = nec_8048_panel_probe,
185 .remove = nec_8048_panel_remove,
186 .enable = nec_8048_panel_enable,
187 .disable = nec_8048_panel_disable,
188 .get_recommended_bpp = nec_8048_recommended_bpp,
191 .name = "NEC_8048_panel",
192 .owner = THIS_MODULE,
196 static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr,
197 unsigned char reg_data)
200 unsigned int cmd = 0, data = 0;
202 cmd = 0x0000 | reg_addr; /* register address write */
203 data = 0x0100 | reg_data ; /* register data write */
204 data = (cmd << 16) | data;
206 ret = spi_write(spi, (unsigned char *)&data, 4);
208 pr_err("error in spi_write %x\n", data);
213 static int init_nec_8048_wvga_lcd(struct spi_device *spi)
216 /* Initialization Sequence */
217 /* nec_8048_spi_send(spi, REG, VAL) */
218 for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++)
219 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
220 nec_8048_init_seq[i].dat);
222 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
223 nec_8048_init_seq[i].dat);
227 static int nec_8048_spi_probe(struct spi_device *spi)
229 spi->mode = SPI_MODE_0;
230 spi->bits_per_word = 32;
233 init_nec_8048_wvga_lcd(spi);
235 return omap_dss_register_driver(&nec_8048_driver);
238 static int nec_8048_spi_remove(struct spi_device *spi)
240 omap_dss_unregister_driver(&nec_8048_driver);
245 #ifdef CONFIG_PM_SLEEP
247 static int nec_8048_spi_suspend(struct device *dev)
249 struct spi_device *spi = to_spi_device(dev);
251 nec_8048_spi_send(spi, 2, 0x01);
257 static int nec_8048_spi_resume(struct device *dev)
259 struct spi_device *spi = to_spi_device(dev);
261 /* reinitialize the panel */
263 nec_8048_spi_send(spi, 2, 0x00);
264 init_nec_8048_wvga_lcd(spi);
269 static SIMPLE_DEV_PM_OPS(nec_8048_spi_pm_ops, nec_8048_spi_suspend,
270 nec_8048_spi_resume);
271 #define NEC_8048_SPI_PM_OPS (&nec_8048_spi_pm_ops)
273 #define NEC_8048_SPI_PM_OPS NULL
276 static struct spi_driver nec_8048_spi_driver = {
277 .probe = nec_8048_spi_probe,
278 .remove = nec_8048_spi_remove,
280 .name = "nec_8048_spi",
281 .owner = THIS_MODULE,
282 .pm = NEC_8048_SPI_PM_OPS,
286 module_spi_driver(nec_8048_spi_driver);
288 MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
289 MODULE_DESCRIPTION("NEC-nl8048hl11-01b Driver");
290 MODULE_LICENSE("GPL");