drivers/video/lg4573.c

   1 /*
   2  * LCD: LG4573, TFT 4.3", 480x800, RGB24
   3  * LCD initialization via SPI
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0
   6  *
   7  */
   8 #include <common.h>
   9 #include <errno.h>
  10 #include <spi.h>
  11
  12 #define PWR_ON_DELAY_MSECS  120
  13
  14 static int lb043wv_spi_write_u16(struct spi_slave *spi, u16 val)
  15 {
  16         unsigned long flags = SPI_XFER_BEGIN;
  17         unsigned short buf16 = htons(val);
  18         int ret = 0;
  19
  20         flags |= SPI_XFER_END;
  21
  22         ret = spi_xfer(spi, 16, &buf16, NULL, flags);
  23         if (ret)
  24                 debug("%s: Failed to send: %d\n", __func__, ret);
  25
  26         return ret;
  27 }
  28
  29 static void lb043wv_spi_write_u16_array(struct spi_slave *spi, u16 *buff,
  30                                         int size)
  31 {
  32         int i;
  33
  34         for (i = 0; i < size; i++)
  35                 lb043wv_spi_write_u16(spi, buff[i]);
  36 }
  37
  38 static void lb043wv_display_mode_settings(struct spi_slave *spi)
  39 {
  40         static u16 display_mode_settings[] = {
  41           0x703A,
  42           0x7270,
  43           0x70B1,
  44           0x7208,
  45           0x723B,
  46           0x720F,
  47           0x70B2,
  48           0x7200,
  49           0x72C8,
  50           0x70B3,
  51           0x7200,
  52           0x70B4,
  53           0x7200,
  54           0x70B5,
  55           0x7242,
  56           0x7210,
  57           0x7210,
  58           0x7200,
  59           0x7220,
  60           0x70B6,
  61           0x720B,
  62           0x720F,
  63           0x723C,
  64           0x7213,
  65           0x7213,
  66           0x72E8,
  67           0x70B7,
  68           0x7246,
  69           0x7206,
  70           0x720C,
  71           0x7200,
  72           0x7200,
  73         };
  74
  75         debug("transfer display mode settings\n");
  76         lb043wv_spi_write_u16_array(spi, display_mode_settings,
  77                                     ARRAY_SIZE(display_mode_settings));
  78 }
  79
  80 static void lb043wv_power_settings(struct spi_slave *spi)
  81 {
  82         static u16 power_settings[] = {
  83           0x70C0,
  84           0x7201,
  85           0x7211,
  86           0x70C3,
  87           0x7207,
  88           0x7203,
  89           0x7204,
  90           0x7204,
  91           0x7204,
  92           0x70C4,
  93           0x7212,
  94           0x7224,
  95           0x7218,
  96           0x7218,
  97           0x7202,
  98           0x7249,
  99           0x70C5,
 100           0x726F,
 101           0x70C6,
 102           0x7241,
 103           0x7263,
 104         };
 105
 106         debug("transfer power settings\n");
 107         lb043wv_spi_write_u16_array(spi, power_settings,
 108                                     ARRAY_SIZE(power_settings));
 109 }
 110
 111 static void lb043wv_gamma_settings(struct spi_slave *spi)
 112 {
 113         static u16 gamma_settings[] = {
 114           0x70D0,
 115           0x7203,
 116           0x7207,
 117           0x7273,
 118           0x7235,
 119           0x7200,
 120           0x7201,
 121           0x7220,
 122           0x7200,
 123           0x7203,
 124           0x70D1,
 125           0x7203,
 126           0x7207,
 127           0x7273,
 128           0x7235,
 129           0x7200,
 130           0x7201,
 131           0x7220,
 132           0x7200,
 133           0x7203,
 134           0x70D2,
 135           0x7203,
 136           0x7207,
 137           0x7273,
 138           0x7235,
 139           0x7200,
 140           0x7201,
 141           0x7220,
 142           0x7200,
 143           0x7203,
 144           0x70D3,
 145           0x7203,
 146           0x7207,
 147           0x7273,
 148           0x7235,
 149           0x7200,
 150           0x7201,
 151           0x7220,
 152           0x7200,
 153           0x7203,
 154           0x70D4,
 155           0x7203,
 156           0x7207,
 157           0x7273,
 158           0x7235,
 159           0x7200,
 160           0x7201,
 161           0x7220,
 162           0x7200,
 163           0x7203,
 164           0x70D5,
 165           0x7203,
 166           0x7207,
 167           0x7273,
 168           0x7235,
 169           0x7200,
 170           0x7201,
 171           0x7220,
 172           0x7200,
 173           0x7203,
 174         };
 175
 176         debug("transfer gamma settings\n");
 177         lb043wv_spi_write_u16_array(spi, gamma_settings,
 178                                     ARRAY_SIZE(gamma_settings));
 179 }
 180
 181 static void lb043wv_display_on(struct spi_slave *spi)
 182 {
 183         static u16 sleep_out = 0x7011;
 184         static u16 display_on = 0x7029;
 185
 186         lb043wv_spi_write_u16(spi, sleep_out);
 187         mdelay(PWR_ON_DELAY_MSECS);
 188         lb043wv_spi_write_u16(spi, display_on);
 189 }
 190
 191 int lg4573_spi_startup(unsigned int bus, unsigned int cs,
 192         unsigned int max_hz, unsigned int spi_mode)
 193 {
 194         struct spi_slave *spi;
 195         int ret;
 196
 197         spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
 198         if (!spi) {
 199                 debug("%s: Failed to set up slave\n", __func__);
 200                 return -1;
 201         }
 202
 203         ret = spi_claim_bus(spi);
 204         if (ret) {
 205                 debug("%s: Failed to claim SPI bus: %d\n", __func__, ret);
 206                 goto err_claim_bus;
 207         }
 208
 209         lb043wv_display_mode_settings(spi);
 210         lb043wv_power_settings(spi);
 211         lb043wv_gamma_settings(spi);
 212
 213         lb043wv_display_on(spi);
 214         return 0;
 215 err_claim_bus:
 216         spi_free_slave(spi);
 217         return -1;
 218 }
 219
 220 static int do_lgset(cmd_tbl_t *cmdtp, int flag, int argc,
 221                        char * const argv[])
 222 {
 223         lg4573_spi_startup(CONFIG_LG4573_BUS, CONFIG_LG4573_CS, 10000000,
 224                            SPI_MODE_0);
 225         return 0;
 226 }
 227
 228 U_BOOT_CMD(
 229         lgset,  2,      1,      do_lgset,
 230         "set lgdisplay",
 231         ""
 232 );