/drivers/video/omap2/displays/panel-lgphilips-lb035q02.c
C | 279 lines | 208 code | 51 blank | 20 comment | 11 complexity | 2baa7b6972da0acb1aba1dad35ef45e1 MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0
1/* 2 * LCD panel driver for LG.Philips LB035Q02 3 * 4 * Author: Steve Sakoman <steve@sakoman.com> 5 * 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. 9 * 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 13 * more details. 14 * 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/>. 17 */ 18 19#include <linux/module.h> 20#include <linux/delay.h> 21#include <linux/spi/spi.h> 22#include <linux/mutex.h> 23 24#include <video/omapdss.h> 25 26struct lb035q02_data { 27 struct mutex lock; 28}; 29 30static struct omap_video_timings lb035q02_timings = { 31 .x_res = 320, 32 .y_res = 240, 33 34 .pixel_clock = 6500, 35 36 .hsw = 2, 37 .hfp = 20, 38 .hbp = 68, 39 40 .vsw = 2, 41 .vfp = 4, 42 .vbp = 18, 43}; 44 45static int lb035q02_panel_power_on(struct omap_dss_device *dssdev) 46{ 47 int r; 48 49 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) 50 return 0; 51 52 r = omapdss_dpi_display_enable(dssdev); 53 if (r) 54 goto err0; 55 56 if (dssdev->platform_enable) { 57 r = dssdev->platform_enable(dssdev); 58 if (r) 59 goto err1; 60 } 61 62 return 0; 63err1: 64 omapdss_dpi_display_disable(dssdev); 65err0: 66 return r; 67} 68 69static void lb035q02_panel_power_off(struct omap_dss_device *dssdev) 70{ 71 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) 72 return; 73 74 if (dssdev->platform_disable) 75 dssdev->platform_disable(dssdev); 76 77 omapdss_dpi_display_disable(dssdev); 78} 79 80static int lb035q02_panel_probe(struct omap_dss_device *dssdev) 81{ 82 struct lb035q02_data *ld; 83 int r; 84 85 dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS | 86 OMAP_DSS_LCD_IHS; 87 dssdev->panel.timings = lb035q02_timings; 88 89 ld = kzalloc(sizeof(*ld), GFP_KERNEL); 90 if (!ld) { 91 r = -ENOMEM; 92 goto err; 93 } 94 mutex_init(&ld->lock); 95 dev_set_drvdata(&dssdev->dev, ld); 96 return 0; 97err: 98 return r; 99} 100 101static void lb035q02_panel_remove(struct omap_dss_device *dssdev) 102{ 103 struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev); 104 105 kfree(ld); 106} 107 108static int lb035q02_panel_enable(struct omap_dss_device *dssdev) 109{ 110 struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev); 111 int r; 112 113 mutex_lock(&ld->lock); 114 115 r = lb035q02_panel_power_on(dssdev); 116 if (r) 117 goto err; 118 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; 119 120 mutex_unlock(&ld->lock); 121 return 0; 122err: 123 mutex_unlock(&ld->lock); 124 return r; 125} 126 127static void lb035q02_panel_disable(struct omap_dss_device *dssdev) 128{ 129 struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev); 130 131 mutex_lock(&ld->lock); 132 133 lb035q02_panel_power_off(dssdev); 134 dssdev->state = OMAP_DSS_DISPLAY_DISABLED; 135 136 mutex_unlock(&ld->lock); 137} 138 139static int lb035q02_panel_suspend(struct omap_dss_device *dssdev) 140{ 141 struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev); 142 143 mutex_lock(&ld->lock); 144 145 lb035q02_panel_power_off(dssdev); 146 dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED; 147 148 mutex_unlock(&ld->lock); 149 return 0; 150} 151 152static int lb035q02_panel_resume(struct omap_dss_device *dssdev) 153{ 154 struct lb035q02_data *ld = dev_get_drvdata(&dssdev->dev); 155 int r; 156 157 mutex_lock(&ld->lock); 158 159 r = lb035q02_panel_power_on(dssdev); 160 if (r) 161 goto err; 162 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; 163 164 mutex_unlock(&ld->lock); 165 return 0; 166err: 167 mutex_unlock(&ld->lock); 168 return r; 169} 170 171static struct omap_dss_driver lb035q02_driver = { 172 .probe = lb035q02_panel_probe, 173 .remove = lb035q02_panel_remove, 174 175 .enable = lb035q02_panel_enable, 176 .disable = lb035q02_panel_disable, 177 .suspend = lb035q02_panel_suspend, 178 .resume = lb035q02_panel_resume, 179 180 .driver = { 181 .name = "lgphilips_lb035q02_panel", 182 .owner = THIS_MODULE, 183 }, 184}; 185 186static int lb035q02_write_reg(struct spi_device *spi, u8 reg, u16 val) 187{ 188 struct spi_message msg; 189 struct spi_transfer index_xfer = { 190 .len = 3, 191 .cs_change = 1, 192 }; 193 struct spi_transfer value_xfer = { 194 .len = 3, 195 }; 196 u8 buffer[16]; 197 198 spi_message_init(&msg); 199 200 /* register index */ 201 buffer[0] = 0x70; 202 buffer[1] = 0x00; 203 buffer[2] = reg & 0x7f; 204 index_xfer.tx_buf = buffer; 205 spi_message_add_tail(&index_xfer, &msg); 206 207 /* register value */ 208 buffer[4] = 0x72; 209 buffer[5] = val >> 8; 210 buffer[6] = val; 211 value_xfer.tx_buf = buffer + 4; 212 spi_message_add_tail(&value_xfer, &msg); 213 214 return spi_sync(spi, &msg); 215} 216 217static void init_lb035q02_panel(struct spi_device *spi) 218{ 219 /* Init sequence from page 28 of the lb035q02 spec */ 220 lb035q02_write_reg(spi, 0x01, 0x6300); 221 lb035q02_write_reg(spi, 0x02, 0x0200); 222 lb035q02_write_reg(spi, 0x03, 0x0177); 223 lb035q02_write_reg(spi, 0x04, 0x04c7); 224 lb035q02_write_reg(spi, 0x05, 0xffc0); 225 lb035q02_write_reg(spi, 0x06, 0xe806); 226 lb035q02_write_reg(spi, 0x0a, 0x4008); 227 lb035q02_write_reg(spi, 0x0b, 0x0000); 228 lb035q02_write_reg(spi, 0x0d, 0x0030); 229 lb035q02_write_reg(spi, 0x0e, 0x2800); 230 lb035q02_write_reg(spi, 0x0f, 0x0000); 231 lb035q02_write_reg(spi, 0x16, 0x9f80); 232 lb035q02_write_reg(spi, 0x17, 0x0a0f); 233 lb035q02_write_reg(spi, 0x1e, 0x00c1); 234 lb035q02_write_reg(spi, 0x30, 0x0300); 235 lb035q02_write_reg(spi, 0x31, 0x0007); 236 lb035q02_write_reg(spi, 0x32, 0x0000); 237 lb035q02_write_reg(spi, 0x33, 0x0000); 238 lb035q02_write_reg(spi, 0x34, 0x0707); 239 lb035q02_write_reg(spi, 0x35, 0x0004); 240 lb035q02_write_reg(spi, 0x36, 0x0302); 241 lb035q02_write_reg(spi, 0x37, 0x0202); 242 lb035q02_write_reg(spi, 0x3a, 0x0a0d); 243 lb035q02_write_reg(spi, 0x3b, 0x0806); 244} 245 246static int __devinit lb035q02_panel_spi_probe(struct spi_device *spi) 247{ 248 init_lb035q02_panel(spi); 249 return omap_dss_register_driver(&lb035q02_driver); 250} 251 252static int __devexit lb035q02_panel_spi_remove(struct spi_device *spi) 253{ 254 omap_dss_unregister_driver(&lb035q02_driver); 255 return 0; 256} 257 258static struct spi_driver lb035q02_spi_driver = { 259 .driver = { 260 .name = "lgphilips_lb035q02_panel-spi", 261 .owner = THIS_MODULE, 262 }, 263 .probe = lb035q02_panel_spi_probe, 264 .remove = __devexit_p(lb035q02_panel_spi_remove), 265}; 266 267static int __init lb035q02_panel_drv_init(void) 268{ 269 return spi_register_driver(&lb035q02_spi_driver); 270} 271 272static void __exit lb035q02_panel_drv_exit(void) 273{ 274 spi_unregister_driver(&lb035q02_spi_driver); 275} 276 277module_init(lb035q02_panel_drv_init); 278module_exit(lb035q02_panel_drv_exit); 279MODULE_LICENSE("GPL");