drivers/video/ld9040.c

   1 /*
   2  * ld9040 AMOLED LCD panel driver.
   3  *
   4  * Copyright (C) 2012 Samsung Electronics
   5  * Donghwa Lee <dh09.lee@samsung.com>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.h>
  11 #include <spi.h>
  12
  13 static const unsigned char SEQ_SWRESET[] = {
  14         0x01,
  15 };
  16
  17 static const unsigned char SEQ_USER_SETTING[] = {
  18         0xF0, 0x5A, 0x5A
  19 };
  20
  21 static const unsigned char SEQ_ELVSS_ON[] = {
  22         0xB1, 0x0D, 0x00, 0x16,
  23 };
  24
  25 static const unsigned char SEQ_TEMP_SWIRE[] = {
  26         0xB2, 0x06, 0x06, 0x06, 0x06,
  27 };
  28
  29 static const unsigned char SEQ_GTCON[] = {
  30         0xF7, 0x09, 0x00, 0x00,
  31 };
  32
  33 static const unsigned char SEQ_PANEL_CONDITION[] = {
  34         0xF8, 0x05, 0x65, 0x96, 0x71, 0x7D, 0x19, 0x3B,
  35         0x0D, 0x19, 0x7E, 0x0D, 0xE2, 0x00, 0x00, 0x7E,
  36         0x7D, 0x07, 0x07, 0x20, 0x20, 0x20, 0x02, 0x02,
  37 };
  38
  39 static const unsigned char SEQ_GAMMA_SET1[] = {
  40         0xF9, 0x00, 0xA7, 0xB4, 0xAE, 0xBF, 0x00, 0x91,
  41         0x00, 0xB2, 0xB4, 0xAA, 0xBB, 0x00, 0xAC, 0x00,
  42         0xB3, 0xB1, 0xAA, 0xBC, 0x00, 0xB3,
  43 };
  44
  45 static const unsigned char SEQ_GAMMA_CTRL[] = {
  46         0xFB, 0x02, 0x5A,
  47 };
  48
  49 static const unsigned char SEQ_APON[] = {
  50         0xF3, 0x00, 0x00, 0x00, 0x0A, 0x02,
  51 };
  52
  53 static const unsigned char SEQ_DISPCTL[] = {
  54         0xF2, 0x02, 0x08, 0x08, 0x10, 0x10,
  55 };
  56
  57 static const unsigned char SEQ_MANPWR[] = {
  58         0xB0, 0x04,
  59 };
  60
  61 static const unsigned char SEQ_PWR_CTRL[] = {
  62         0xF4, 0x0A, 0x87, 0x25, 0x6A, 0x44, 0x02, 0x88,
  63 };
  64
  65 static const unsigned char SEQ_SLPOUT[] = {
  66         0x11,
  67 };
  68
  69 static const unsigned char SEQ_SLPIN[] = {
  70         0x10,
  71 };
  72
  73 static const unsigned char SEQ_DISPON[] = {
  74         0x29,
  75 };
  76
  77 static const unsigned char SEQ_DISPOFF[] = {
  78         0x28,
  79 };
  80
  81 static void ld9040_spi_write(const unsigned char *wbuf, unsigned int size_cmd)
  82 {
  83         int i = 0;
  84
  85         /*
  86          * Data are transmitted in 9-bit words:
  87          * the first bit is command/parameter, the other are the value.
  88          * The value's LSB is shifted to MSB position, to be sent as 9th bit
  89          */
  90
  91         unsigned int data_out = 0, data_in = 0;
  92         for (i = 0; i < size_cmd; i++) {
  93                 data_out = wbuf[i] >> 1;
  94                 if (i != 0)
  95                         data_out += 0x0080;
  96                 if (wbuf[i] & 0x01)
  97                         data_out += 0x8000;
  98                 spi_xfer(NULL, 9, &data_out, &data_in, SPI_XFER_BEGIN);
  99         }
 100 }
 101
 102 void ld9040_cfg_ldo(void)
 103 {
 104         udelay(10);
 105
 106         ld9040_spi_write(SEQ_USER_SETTING,
 107                                         ARRAY_SIZE(SEQ_USER_SETTING));
 108         ld9040_spi_write(SEQ_PANEL_CONDITION,
 109                                         ARRAY_SIZE(SEQ_PANEL_CONDITION));
 110         ld9040_spi_write(SEQ_DISPCTL, ARRAY_SIZE(SEQ_DISPCTL));
 111         ld9040_spi_write(SEQ_MANPWR, ARRAY_SIZE(SEQ_MANPWR));
 112         ld9040_spi_write(SEQ_PWR_CTRL, ARRAY_SIZE(SEQ_PWR_CTRL));
 113         ld9040_spi_write(SEQ_ELVSS_ON, ARRAY_SIZE(SEQ_ELVSS_ON));
 114         ld9040_spi_write(SEQ_GTCON, ARRAY_SIZE(SEQ_GTCON));
 115         ld9040_spi_write(SEQ_GAMMA_SET1, ARRAY_SIZE(SEQ_GAMMA_SET1));
 116         ld9040_spi_write(SEQ_GAMMA_CTRL, ARRAY_SIZE(SEQ_GAMMA_CTRL));
 117         ld9040_spi_write(SEQ_SLPOUT, ARRAY_SIZE(SEQ_SLPOUT));
 118
 119         udelay(120);
 120 }
 121
 122 void ld9040_enable_ldo(unsigned int onoff)
 123 {
 124         if (onoff)
 125                 ld9040_spi_write(SEQ_DISPON, ARRAY_SIZE(SEQ_DISPON));
 126         else
 127                 ld9040_spi_write(SEQ_DISPOFF, ARRAY_SIZE(SEQ_DISPOFF));
 128 }