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  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25
  26 #include <common.h>
  27 #include <spi.h>
  28
  29 static const unsigned char SEQ_SWRESET[] = {
  30         0x01,
  31 };
  32
  33 static const unsigned char SEQ_USER_SETTING[] = {
  34         0xF0, 0x5A, 0x5A
  35 };
  36
  37 static const unsigned char SEQ_ELVSS_ON[] = {
  38         0xB1, 0x0D, 0x00, 0x16,
  39 };
  40
  41 static const unsigned char SEQ_TEMP_SWIRE[] = {
  42         0xB2, 0x06, 0x06, 0x06, 0x06,
  43 };
  44
  45 static const unsigned char SEQ_GTCON[] = {
  46         0xF7, 0x09, 0x00, 0x00,
  47 };
  48
  49 static const unsigned char SEQ_PANEL_CONDITION[] = {
  50         0xF8, 0x05, 0x65, 0x96, 0x71, 0x7D, 0x19, 0x3B,
  51         0x0D, 0x19, 0x7E, 0x0D, 0xE2, 0x00, 0x00, 0x7E,
  52         0x7D, 0x07, 0x07, 0x20, 0x20, 0x20, 0x02, 0x02,
  53 };
  54
  55 static const unsigned char SEQ_GAMMA_SET1[] = {
  56         0xF9, 0x00, 0xA7, 0xB4, 0xAE, 0xBF, 0x00, 0x91,
  57         0x00, 0xB2, 0xB4, 0xAA, 0xBB, 0x00, 0xAC, 0x00,
  58         0xB3, 0xB1, 0xAA, 0xBC, 0x00, 0xB3,
  59 };
  60
  61 static const unsigned char SEQ_GAMMA_CTRL[] = {
  62         0xFB, 0x02, 0x5A,
  63 };
  64
  65 static const unsigned char SEQ_APON[] = {
  66         0xF3, 0x00, 0x00, 0x00, 0x0A, 0x02,
  67 };
  68
  69 static const unsigned char SEQ_DISPCTL[] = {
  70         0xF2, 0x02, 0x08, 0x08, 0x10, 0x10,
  71 };
  72
  73 static const unsigned char SEQ_MANPWR[] = {
  74         0xB0, 0x04,
  75 };
  76
  77 static const unsigned char SEQ_PWR_CTRL[] = {
  78         0xF4, 0x0A, 0x87, 0x25, 0x6A, 0x44, 0x02, 0x88,
  79 };
  80
  81 static const unsigned char SEQ_SLPOUT[] = {
  82         0x11,
  83 };
  84
  85 static const unsigned char SEQ_SLPIN[] = {
  86         0x10,
  87 };
  88
  89 static const unsigned char SEQ_DISPON[] = {
  90         0x29,
  91 };
  92
  93 static const unsigned char SEQ_DISPOFF[] = {
  94         0x28,
  95 };
  96
  97 static void ld9040_spi_write(const unsigned char *wbuf, unsigned int size_cmd)
  98 {
  99         int i = 0;
 100
 101         /*
 102          * Data are transmitted in 9-bit words:
 103          * the first bit is command/parameter, the other are the value.
 104          * The value's LSB is shifted to MSB position, to be sent as 9th bit
 105          */
 106
 107         unsigned int data_out = 0, data_in = 0;
 108         for (i = 0; i < size_cmd; i++) {
 109                 data_out = wbuf[i] >> 1;
 110                 if (i != 0)
 111                         data_out += 0x0080;
 112                 if (wbuf[i] & 0x01)
 113                         data_out += 0x8000;
 114                 spi_xfer(NULL, 9, &data_out, &data_in, SPI_XFER_BEGIN);
 115         }
 116 }
 117
 118 void ld9040_cfg_ldo(void)
 119 {
 120         udelay(10);
 121
 122         ld9040_spi_write(SEQ_USER_SETTING,
 123                                         ARRAY_SIZE(SEQ_USER_SETTING));
 124         ld9040_spi_write(SEQ_PANEL_CONDITION,
 125                                         ARRAY_SIZE(SEQ_PANEL_CONDITION));
 126         ld9040_spi_write(SEQ_DISPCTL, ARRAY_SIZE(SEQ_DISPCTL));
 127         ld9040_spi_write(SEQ_MANPWR, ARRAY_SIZE(SEQ_MANPWR));
 128         ld9040_spi_write(SEQ_PWR_CTRL, ARRAY_SIZE(SEQ_PWR_CTRL));
 129         ld9040_spi_write(SEQ_ELVSS_ON, ARRAY_SIZE(SEQ_ELVSS_ON));
 130         ld9040_spi_write(SEQ_GTCON, ARRAY_SIZE(SEQ_GTCON));
 131         ld9040_spi_write(SEQ_GAMMA_SET1, ARRAY_SIZE(SEQ_GAMMA_SET1));
 132         ld9040_spi_write(SEQ_GAMMA_CTRL, ARRAY_SIZE(SEQ_GAMMA_CTRL));
 133         ld9040_spi_write(SEQ_SLPOUT, ARRAY_SIZE(SEQ_SLPOUT));
 134
 135         udelay(120);
 136 }
 137
 138 void ld9040_enable_ldo(unsigned int onoff)
 139 {
 140         if (onoff)
 141                 ld9040_spi_write(SEQ_DISPON, ARRAY_SIZE(SEQ_DISPON));
 142         else
 143                 ld9040_spi_write(SEQ_DISPOFF, ARRAY_SIZE(SEQ_DISPOFF));
 144 }