drivers/video/lg4573.c

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