lg4573.c 3.6 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231
  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * LCD: LG4573, TFT 4.3", 480x800, RGB24
  4. * LCD initialization via SPI
  5. *
  6. */
  7. #include <common.h>
  8. #include <errno.h>
  9. #include <spi.h>
  10. #define PWR_ON_DELAY_MSECS 120
  11. static int lb043wv_spi_write_u16(struct spi_slave *spi, u16 val)
  12. {
  13. unsigned long flags = SPI_XFER_BEGIN;
  14. unsigned short buf16 = htons(val);
  15. int ret = 0;
  16. flags |= SPI_XFER_END;
  17. ret = spi_xfer(spi, 16, &buf16, NULL, flags);
  18. if (ret)
  19. debug("%s: Failed to send: %d\n", __func__, ret);
  20. return ret;
  21. }
  22. static void lb043wv_spi_write_u16_array(struct spi_slave *spi, u16 *buff,
  23. int size)
  24. {
  25. int i;
  26. for (i = 0; i < size; i++)
  27. lb043wv_spi_write_u16(spi, buff[i]);
  28. }
  29. static void lb043wv_display_mode_settings(struct spi_slave *spi)
  30. {
  31. static u16 display_mode_settings[] = {
  32. 0x703A,
  33. 0x7270,
  34. 0x70B1,
  35. 0x7208,
  36. 0x723B,
  37. 0x720F,
  38. 0x70B2,
  39. 0x7200,
  40. 0x72C8,
  41. 0x70B3,
  42. 0x7200,
  43. 0x70B4,
  44. 0x7200,
  45. 0x70B5,
  46. 0x7242,
  47. 0x7210,
  48. 0x7210,
  49. 0x7200,
  50. 0x7220,
  51. 0x70B6,
  52. 0x720B,
  53. 0x720F,
  54. 0x723C,
  55. 0x7213,
  56. 0x7213,
  57. 0x72E8,
  58. 0x70B7,
  59. 0x7246,
  60. 0x7206,
  61. 0x720C,
  62. 0x7200,
  63. 0x7200,
  64. };
  65. debug("transfer display mode settings\n");
  66. lb043wv_spi_write_u16_array(spi, display_mode_settings,
  67. ARRAY_SIZE(display_mode_settings));
  68. }
  69. static void lb043wv_power_settings(struct spi_slave *spi)
  70. {
  71. static u16 power_settings[] = {
  72. 0x70C0,
  73. 0x7201,
  74. 0x7211,
  75. 0x70C3,
  76. 0x7207,
  77. 0x7203,
  78. 0x7204,
  79. 0x7204,
  80. 0x7204,
  81. 0x70C4,
  82. 0x7212,
  83. 0x7224,
  84. 0x7218,
  85. 0x7218,
  86. 0x7202,
  87. 0x7249,
  88. 0x70C5,
  89. 0x726F,
  90. 0x70C6,
  91. 0x7241,
  92. 0x7263,
  93. };
  94. debug("transfer power settings\n");
  95. lb043wv_spi_write_u16_array(spi, power_settings,
  96. ARRAY_SIZE(power_settings));
  97. }
  98. static void lb043wv_gamma_settings(struct spi_slave *spi)
  99. {
  100. static u16 gamma_settings[] = {
  101. 0x70D0,
  102. 0x7203,
  103. 0x7207,
  104. 0x7273,
  105. 0x7235,
  106. 0x7200,
  107. 0x7201,
  108. 0x7220,
  109. 0x7200,
  110. 0x7203,
  111. 0x70D1,
  112. 0x7203,
  113. 0x7207,
  114. 0x7273,
  115. 0x7235,
  116. 0x7200,
  117. 0x7201,
  118. 0x7220,
  119. 0x7200,
  120. 0x7203,
  121. 0x70D2,
  122. 0x7203,
  123. 0x7207,
  124. 0x7273,
  125. 0x7235,
  126. 0x7200,
  127. 0x7201,
  128. 0x7220,
  129. 0x7200,
  130. 0x7203,
  131. 0x70D3,
  132. 0x7203,
  133. 0x7207,
  134. 0x7273,
  135. 0x7235,
  136. 0x7200,
  137. 0x7201,
  138. 0x7220,
  139. 0x7200,
  140. 0x7203,
  141. 0x70D4,
  142. 0x7203,
  143. 0x7207,
  144. 0x7273,
  145. 0x7235,
  146. 0x7200,
  147. 0x7201,
  148. 0x7220,
  149. 0x7200,
  150. 0x7203,
  151. 0x70D5,
  152. 0x7203,
  153. 0x7207,
  154. 0x7273,
  155. 0x7235,
  156. 0x7200,
  157. 0x7201,
  158. 0x7220,
  159. 0x7200,
  160. 0x7203,
  161. };
  162. debug("transfer gamma settings\n");
  163. lb043wv_spi_write_u16_array(spi, gamma_settings,
  164. ARRAY_SIZE(gamma_settings));
  165. }
  166. static void lb043wv_display_on(struct spi_slave *spi)
  167. {
  168. static u16 sleep_out = 0x7011;
  169. static u16 display_on = 0x7029;
  170. lb043wv_spi_write_u16(spi, sleep_out);
  171. mdelay(PWR_ON_DELAY_MSECS);
  172. lb043wv_spi_write_u16(spi, display_on);
  173. }
  174. int lg4573_spi_startup(unsigned int bus, unsigned int cs,
  175. unsigned int max_hz, unsigned int spi_mode)
  176. {
  177. struct spi_slave *spi;
  178. int ret;
  179. spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
  180. if (!spi) {
  181. debug("%s: Failed to set up slave\n", __func__);
  182. return -1;
  183. }
  184. ret = spi_claim_bus(spi);
  185. if (ret) {
  186. debug("%s: Failed to claim SPI bus: %d\n", __func__, ret);
  187. goto err_claim_bus;
  188. }
  189. lb043wv_display_mode_settings(spi);
  190. lb043wv_power_settings(spi);
  191. lb043wv_gamma_settings(spi);
  192. lb043wv_display_on(spi);
  193. return 0;
  194. err_claim_bus:
  195. spi_free_slave(spi);
  196. return -1;
  197. }
  198. static int do_lgset(cmd_tbl_t *cmdtp, int flag, int argc,
  199. char * const argv[])
  200. {
  201. lg4573_spi_startup(CONFIG_LG4573_BUS, CONFIG_LG4573_CS, 10000000,
  202. SPI_MODE_0);
  203. return 0;
  204. }
  205. U_BOOT_CMD(
  206. lgset, 2, 1, do_lgset,
  207. "set lgdisplay",
  208. ""
  209. );