ld9040.c 2.6 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * ld9040 AMOLED LCD panel driver.
  4. *
  5. * Copyright (C) 2012 Samsung Electronics
  6. * Donghwa Lee <dh09.lee@samsung.com>
  7. */
  8. #include <common.h>
  9. #include <spi.h>
  10. static const unsigned char SEQ_USER_SETTING[] = {
  11. 0xF0, 0x5A, 0x5A
  12. };
  13. static const unsigned char SEQ_ELVSS_ON[] = {
  14. 0xB1, 0x0D, 0x00, 0x16,
  15. };
  16. static const unsigned char SEQ_GTCON[] = {
  17. 0xF7, 0x09, 0x00, 0x00,
  18. };
  19. static const unsigned char SEQ_PANEL_CONDITION[] = {
  20. 0xF8, 0x05, 0x65, 0x96, 0x71, 0x7D, 0x19, 0x3B,
  21. 0x0D, 0x19, 0x7E, 0x0D, 0xE2, 0x00, 0x00, 0x7E,
  22. 0x7D, 0x07, 0x07, 0x20, 0x20, 0x20, 0x02, 0x02,
  23. };
  24. static const unsigned char SEQ_GAMMA_SET1[] = {
  25. 0xF9, 0x00, 0xA7, 0xB4, 0xAE, 0xBF, 0x00, 0x91,
  26. 0x00, 0xB2, 0xB4, 0xAA, 0xBB, 0x00, 0xAC, 0x00,
  27. 0xB3, 0xB1, 0xAA, 0xBC, 0x00, 0xB3,
  28. };
  29. static const unsigned char SEQ_GAMMA_CTRL[] = {
  30. 0xFB, 0x02, 0x5A,
  31. };
  32. static const unsigned char SEQ_DISPCTL[] = {
  33. 0xF2, 0x02, 0x08, 0x08, 0x10, 0x10,
  34. };
  35. static const unsigned char SEQ_MANPWR[] = {
  36. 0xB0, 0x04,
  37. };
  38. static const unsigned char SEQ_PWR_CTRL[] = {
  39. 0xF4, 0x0A, 0x87, 0x25, 0x6A, 0x44, 0x02, 0x88,
  40. };
  41. static const unsigned char SEQ_SLPOUT[] = {
  42. 0x11,
  43. };
  44. static const unsigned char SEQ_DISPON[] = {
  45. 0x29,
  46. };
  47. static const unsigned char SEQ_DISPOFF[] = {
  48. 0x28,
  49. };
  50. static void ld9040_spi_write(const unsigned char *wbuf, unsigned int size_cmd)
  51. {
  52. int i = 0;
  53. /*
  54. * Data are transmitted in 9-bit words:
  55. * the first bit is command/parameter, the other are the value.
  56. * The value's LSB is shifted to MSB position, to be sent as 9th bit
  57. */
  58. unsigned int data_out = 0, data_in = 0;
  59. for (i = 0; i < size_cmd; i++) {
  60. data_out = wbuf[i] >> 1;
  61. if (i != 0)
  62. data_out += 0x0080;
  63. if (wbuf[i] & 0x01)
  64. data_out += 0x8000;
  65. spi_xfer(NULL, 9, &data_out, &data_in, SPI_XFER_BEGIN);
  66. }
  67. }
  68. void ld9040_cfg_ldo(void)
  69. {
  70. udelay(10);
  71. ld9040_spi_write(SEQ_USER_SETTING,
  72. ARRAY_SIZE(SEQ_USER_SETTING));
  73. ld9040_spi_write(SEQ_PANEL_CONDITION,
  74. ARRAY_SIZE(SEQ_PANEL_CONDITION));
  75. ld9040_spi_write(SEQ_DISPCTL, ARRAY_SIZE(SEQ_DISPCTL));
  76. ld9040_spi_write(SEQ_MANPWR, ARRAY_SIZE(SEQ_MANPWR));
  77. ld9040_spi_write(SEQ_PWR_CTRL, ARRAY_SIZE(SEQ_PWR_CTRL));
  78. ld9040_spi_write(SEQ_ELVSS_ON, ARRAY_SIZE(SEQ_ELVSS_ON));
  79. ld9040_spi_write(SEQ_GTCON, ARRAY_SIZE(SEQ_GTCON));
  80. ld9040_spi_write(SEQ_GAMMA_SET1, ARRAY_SIZE(SEQ_GAMMA_SET1));
  81. ld9040_spi_write(SEQ_GAMMA_CTRL, ARRAY_SIZE(SEQ_GAMMA_CTRL));
  82. ld9040_spi_write(SEQ_SLPOUT, ARRAY_SIZE(SEQ_SLPOUT));
  83. udelay(120);
  84. }
  85. void ld9040_enable_ldo(unsigned int onoff)
  86. {
  87. if (onoff)
  88. ld9040_spi_write(SEQ_DISPON, ARRAY_SIZE(SEQ_DISPON));
  89. else
  90. ld9040_spi_write(SEQ_DISPOFF, ARRAY_SIZE(SEQ_DISPOFF));
  91. }