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