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

https://bitbucket.org/cyanogenmod/android_kernel_asus_tf300t · C · 279 lines · 208 code · 51 blank · 20 comment · 11 complexity · 2baa7b6972da0acb1aba1dad35ef45e1 MD5 · raw file

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