| Heiko Schocher | 337fb3d | 2015-04-12 10:20:19 +0200 | [diff] [blame] | 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(0, 0, 10000000, SPI_MODE_0); |
| 224 | return 0; |
| 225 | } |
| 226 | |
| 227 | U_BOOT_CMD( |
| 228 | lgset, 2, 1, do_lgset, |
| 229 | "set lgdisplay", |
| 230 | "" |
| 231 | ); |