drivers/video/ld9040.c

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