drivers/video/omap2/displays/panel-lgphilips-lb035q02.c

   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
  26 struct lb035q02_data {
  27         struct mutex lock;
  28 };
  29
  30 static 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
  45 static 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;
  63 err1:
  64         omapdss_dpi_display_disable(dssdev);
  65 err0:
  66         return r;
  67 }
  68
  69 static 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
  80 static 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;
  97 err:
  98         return r;
  99 }
 100
 101 static 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
 108 static 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;
 122 err:
 123         mutex_unlock(&ld->lock);
 124         return r;
 125 }
 126
 127 static 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
 139 static 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
 152 static 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;
 166 err:
 167         mutex_unlock(&ld->lock);
 168         return r;
 169 }
 170
 171 static 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
 186 static 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
 217 static 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
 246 static 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
 252 static int __devexit lb035q02_panel_spi_remove(struct spi_device *spi)
 253 {
 254         omap_dss_unregister_driver(&lb035q02_driver);
 255         return 0;
 256 }
 257
 258 static 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
 267 static int __init lb035q02_panel_drv_init(void)
 268 {
 269         return spi_register_driver(&lb035q02_spi_driver);
 270 }
 271
 272 static void __exit lb035q02_panel_drv_exit(void)
 273 {
 274         spi_unregister_driver(&lb035q02_spi_driver);
 275 }
 276
 277 module_init(lb035q02_panel_drv_init);
 278 module_exit(lb035q02_panel_drv_exit);
 279 MODULE_LICENSE("GPL");