232 lines
3.6 KiB
C
232 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* LCD: LG4573, TFT 4.3", 480x800, RGB24
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* LCD initialization via SPI
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*
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*/
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#include <common.h>
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#include <errno.h>
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#include <spi.h>
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#define PWR_ON_DELAY_MSECS 120
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static int lb043wv_spi_write_u16(struct spi_slave *spi, u16 val)
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{
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unsigned long flags = SPI_XFER_BEGIN;
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unsigned short buf16 = htons(val);
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int ret = 0;
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flags |= SPI_XFER_END;
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ret = spi_xfer(spi, 16, &buf16, NULL, flags);
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if (ret)
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debug("%s: Failed to send: %d\n", __func__, ret);
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return ret;
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}
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static void lb043wv_spi_write_u16_array(struct spi_slave *spi, u16 *buff,
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int size)
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{
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int i;
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for (i = 0; i < size; i++)
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lb043wv_spi_write_u16(spi, buff[i]);
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}
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static void lb043wv_display_mode_settings(struct spi_slave *spi)
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{
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static u16 display_mode_settings[] = {
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0x703A,
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0x7270,
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0x70B1,
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0x7208,
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0x723B,
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0x720F,
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0x70B2,
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0x7200,
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0x72C8,
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0x70B3,
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0x7200,
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0x70B4,
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0x7200,
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0x70B5,
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0x7242,
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0x7210,
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0x7210,
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0x7200,
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0x7220,
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0x70B6,
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0x720B,
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0x720F,
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0x723C,
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0x7213,
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0x7213,
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0x72E8,
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0x70B7,
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0x7246,
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0x7206,
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0x720C,
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0x7200,
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0x7200,
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};
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debug("transfer display mode settings\n");
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lb043wv_spi_write_u16_array(spi, display_mode_settings,
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ARRAY_SIZE(display_mode_settings));
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}
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static void lb043wv_power_settings(struct spi_slave *spi)
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{
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static u16 power_settings[] = {
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0x70C0,
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0x7201,
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0x7211,
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0x70C3,
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0x7207,
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0x7203,
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0x7204,
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0x7204,
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0x7204,
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0x70C4,
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0x7212,
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0x7224,
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0x7218,
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0x7218,
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0x7202,
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0x7249,
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0x70C5,
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0x726F,
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0x70C6,
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0x7241,
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0x7263,
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};
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debug("transfer power settings\n");
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lb043wv_spi_write_u16_array(spi, power_settings,
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ARRAY_SIZE(power_settings));
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}
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static void lb043wv_gamma_settings(struct spi_slave *spi)
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{
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static u16 gamma_settings[] = {
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0x70D0,
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0x7203,
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0x7207,
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0x7273,
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0x7235,
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0x7200,
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0x7201,
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0x7220,
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0x7200,
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0x7203,
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0x70D1,
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0x7203,
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0x7207,
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0x7273,
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0x7235,
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0x7200,
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0x7201,
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0x7220,
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0x7200,
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0x7203,
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0x70D2,
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0x7203,
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0x7207,
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0x7273,
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0x7235,
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0x7200,
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0x7201,
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0x7220,
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0x7200,
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0x7203,
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0x70D3,
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0x7203,
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0x7207,
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0x7273,
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0x7235,
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0x7200,
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0x7201,
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0x7220,
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0x7200,
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0x7203,
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0x70D4,
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0x7203,
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0x7207,
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0x7273,
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0x7235,
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0x7200,
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0x7201,
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0x7220,
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0x7200,
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0x7203,
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0x70D5,
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0x7203,
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0x7207,
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0x7273,
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0x7235,
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0x7200,
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0x7201,
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0x7220,
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0x7200,
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0x7203,
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};
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debug("transfer gamma settings\n");
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lb043wv_spi_write_u16_array(spi, gamma_settings,
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ARRAY_SIZE(gamma_settings));
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}
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static void lb043wv_display_on(struct spi_slave *spi)
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{
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static u16 sleep_out = 0x7011;
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static u16 display_on = 0x7029;
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lb043wv_spi_write_u16(spi, sleep_out);
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mdelay(PWR_ON_DELAY_MSECS);
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lb043wv_spi_write_u16(spi, display_on);
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}
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int lg4573_spi_startup(unsigned int bus, unsigned int cs,
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unsigned int max_hz, unsigned int spi_mode)
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{
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struct spi_slave *spi;
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int ret;
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spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
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if (!spi) {
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debug("%s: Failed to set up slave\n", __func__);
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return -1;
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}
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ret = spi_claim_bus(spi);
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if (ret) {
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debug("%s: Failed to claim SPI bus: %d\n", __func__, ret);
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goto err_claim_bus;
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}
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lb043wv_display_mode_settings(spi);
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lb043wv_power_settings(spi);
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lb043wv_gamma_settings(spi);
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lb043wv_display_on(spi);
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return 0;
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err_claim_bus:
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spi_free_slave(spi);
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return -1;
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}
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static int do_lgset(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[])
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{
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lg4573_spi_startup(CONFIG_LG4573_BUS, CONFIG_LG4573_CS, 10000000,
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SPI_MODE_0);
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return 0;
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}
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U_BOOT_CMD(
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lgset, 2, 1, do_lgset,
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"set lgdisplay",
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""
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);
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