// SPDX-License-Identifier: GPL-2.0+ /* * scf0403.c -- support for DataImage SCF0403 LCD * * Copyright (c) 2013 Adapted from Linux driver: * Copyright (c) 2012 Anders Electronics plc. All Rights Reserved. * Copyright (c) 2012 CompuLab, Ltd * Dmitry Lifshitz <lifshitz@compulab.co.il> * Ilya Ledvich <ilya@compulab.co.il> * Inspired by Alberto Panizzo <maramaopercheseimorto@gmail.com> & * Marek Vasut work in l4f00242t03.c * * U-Boot port: Nikita Kiryanov <nikita@compulab.co.il> */ #include <common.h> #include <asm/gpio.h> #include <spi.h> struct scf0403_cmd { u16 cmd; u16 *params; int count; }; struct scf0403_initseq_entry { struct scf0403_cmd cmd; int delay_ms; }; struct scf0403_priv { struct spi_slave *spi; unsigned int reset_gpio; u32 rddid; struct scf0403_initseq_entry *init_seq; int seq_size; }; struct scf0403_priv priv; #define SCF0403852GGU04_ID 0x000080 /* SCF0403526GGU20 model commands parameters */ static u16 extcmd_params_sn20[] = {0xff, 0x98, 0x06}; static u16 spiinttype_params_sn20[] = {0x60}; static u16 bc_params_sn20[] = { 0x01, 0x10, 0x61, 0x74, 0x01, 0x01, 0x1B, 0x12, 0x71, 0x00, 0x00, 0x00, 0x01, 0x01, 0x05, 0x00, 0xFF, 0xF2, 0x01, 0x00, 0x40, }; static u16 bd_params_sn20[] = {0x01, 0x23, 0x45, 0x67, 0x01, 0x23, 0x45, 0x67}; static u16 be_params_sn20[] = { 0x01, 0x22, 0x22, 0xBA, 0xDC, 0x26, 0x28, 0x22, 0x22, }; static u16 vcom_params_sn20[] = {0x74}; static u16 vmesur_params_sn20[] = {0x7F, 0x0F, 0x00}; static u16 powerctl_params_sn20[] = {0x03, 0x0b, 0x00}; static u16 lvglvolt_params_sn20[] = {0x08}; static u16 engsetting_params_sn20[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x20}; static u16 dispfunc_params_sn20[] = {0xa0}; static u16 dvddvolt_params_sn20[] = {0x74}; static u16 dispinv_params_sn20[] = {0x00, 0x00, 0x00}; static u16 panelres_params_sn20[] = {0x82}; static u16 framerate_params_sn20[] = {0x00, 0x13, 0x13}; static u16 timing_params_sn20[] = {0x80, 0x05, 0x40, 0x28}; static u16 powerctl2_params_sn20[] = {0x17, 0x75, 0x79, 0x20}; static u16 memaccess_params_sn20[] = {0x00}; static u16 pixfmt_params_sn20[] = {0x66}; static u16 pgamma_params_sn20[] = { 0x00, 0x03, 0x0b, 0x0c, 0x0e, 0x08, 0xc5, 0x04, 0x08, 0x0c, 0x13, 0x11, 0x11, 0x14, 0x0c, 0x10, }; static u16 ngamma_params_sn20[] = { 0x00, 0x0d, 0x11, 0x0c, 0x0c, 0x04, 0x76, 0x03, 0x08, 0x0b, 0x16, 0x10, 0x0d, 0x16, 0x0a, 0x00, }; static u16 tearing_params_sn20[] = {0x00}; /* SCF0403852GGU04 model commands parameters */ static u16 memaccess_params_sn04[] = {0x08}; static u16 pixfmt_params_sn04[] = {0x66}; static u16 modectl_params_sn04[] = {0x01}; static u16 dispfunc_params_sn04[] = {0x22, 0xe2, 0xFF, 0x04}; static u16 vcom_params_sn04[] = {0x00, 0x6A}; static u16 pgamma_params_sn04[] = { 0x00, 0x07, 0x0d, 0x10, 0x13, 0x19, 0x0f, 0x0c, 0x05, 0x08, 0x06, 0x13, 0x0f, 0x30, 0x20, 0x1f, }; static u16 ngamma_params_sn04[] = { 0x1F, 0x20, 0x30, 0x0F, 0x13, 0x06, 0x08, 0x05, 0x0C, 0x0F, 0x19, 0x13, 0x10, 0x0D, 0x07, 0x00, }; static u16 dispinv_params_sn04[] = {0x02}; /* Common commands */ static struct scf0403_cmd scf0403_cmd_slpout = {0x11, NULL, 0}; static struct scf0403_cmd scf0403_cmd_dison = {0x29, NULL, 0}; /* SCF0403852GGU04 init sequence */ static struct scf0403_initseq_entry scf0403_initseq_sn04[] = { {{0x36, memaccess_params_sn04, ARRAY_SIZE(memaccess_params_sn04)}, 0}, {{0x3A, pixfmt_params_sn04, ARRAY_SIZE(pixfmt_params_sn04)}, 0}, {{0xB6, dispfunc_params_sn04, ARRAY_SIZE(dispfunc_params_sn04)}, 0}, {{0xC5, vcom_params_sn04, ARRAY_SIZE(vcom_params_sn04)}, 0}, {{0xE0, pgamma_params_sn04, ARRAY_SIZE(pgamma_params_sn04)}, 0}, {{0xE1, ngamma_params_sn04, ARRAY_SIZE(ngamma_params_sn04)}, 20}, {{0xB0, modectl_params_sn04, ARRAY_SIZE(modectl_params_sn04)}, 0}, {{0xB4, dispinv_params_sn04, ARRAY_SIZE(dispinv_params_sn04)}, 100}, }; /* SCF0403526GGU20 init sequence */ static struct scf0403_initseq_entry scf0403_initseq_sn20[] = { {{0xff, extcmd_params_sn20, ARRAY_SIZE(extcmd_params_sn20)}, 0}, {{0xba, spiinttype_params_sn20, ARRAY_SIZE(spiinttype_params_sn20)}, 0}, {{0xbc, bc_params_sn20, ARRAY_SIZE(bc_params_sn20)}, 0}, {{0xbd, bd_params_sn20, ARRAY_SIZE(bd_params_sn20)}, 0}, {{0xbe, be_params_sn20, ARRAY_SIZE(be_params_sn20)}, 0}, {{0xc7, vcom_params_sn20, ARRAY_SIZE(vcom_params_sn20)}, 0}, {{0xed, vmesur_params_sn20, ARRAY_SIZE(vmesur_params_sn20)}, 0}, {{0xc0, powerctl_params_sn20, ARRAY_SIZE(powerctl_params_sn20)}, 0}, {{0xfc, lvglvolt_params_sn20, ARRAY_SIZE(lvglvolt_params_sn20)}, 0}, {{0xb6, dispfunc_params_sn20, ARRAY_SIZE(dispfunc_params_sn20)}, 0}, {{0xdf, engsetting_params_sn20, ARRAY_SIZE(engsetting_params_sn20)}, 0}, {{0xf3, dvddvolt_params_sn20, ARRAY_SIZE(dvddvolt_params_sn20)}, 0}, {{0xb4, dispinv_params_sn20, ARRAY_SIZE(dispinv_params_sn20)}, 0}, {{0xf7, panelres_params_sn20, ARRAY_SIZE(panelres_params_sn20)}, 0}, {{0xb1, framerate_params_sn20, ARRAY_SIZE(framerate_params_sn20)}, 0}, {{0xf2, timing_params_sn20, ARRAY_SIZE(timing_params_sn20)}, 0}, {{0xc1, powerctl2_params_sn20, ARRAY_SIZE(powerctl2_params_sn20)}, 0}, {{0x36, memaccess_params_sn20, ARRAY_SIZE(memaccess_params_sn20)}, 0}, {{0x3a, pixfmt_params_sn20, ARRAY_SIZE(pixfmt_params_sn20)}, 0}, {{0xe0, pgamma_params_sn20, ARRAY_SIZE(pgamma_params_sn20)}, 0}, {{0xe1, ngamma_params_sn20, ARRAY_SIZE(ngamma_params_sn20)}, 0}, {{0x35, tearing_params_sn20, ARRAY_SIZE(tearing_params_sn20)}, 0}, }; static void scf0403_gpio_reset(unsigned int gpio) { if (!gpio_is_valid(gpio)) return; gpio_set_value(gpio, 1); mdelay(100); gpio_set_value(gpio, 0); mdelay(40); gpio_set_value(gpio, 1); mdelay(100); } static int scf0403_spi_read_rddid(struct spi_slave *spi, u32 *rddid) { int error = 0; u8 ids_buf = 0x00; u16 dummy_buf = 0x00; u16 cmd = 0x04; error = spi_set_wordlen(spi, 9); if (error) return error; /* Here 9 bits required to transmit a command */ error = spi_xfer(spi, 9, &cmd, NULL, SPI_XFER_ONCE); if (error) return error; /* * Here 8 + 1 bits required to arrange extra clock cycle * before the first data bit. * According to the datasheet - first parameter is the dummy data. */ error = spi_xfer(spi, 9, NULL, &dummy_buf, SPI_XFER_ONCE); if (error) return error; error = spi_set_wordlen(spi, 8); if (error) return error; /* Read rest of the data */ error = spi_xfer(spi, 8, NULL, &ids_buf, SPI_XFER_ONCE); if (error) return error; *rddid = ids_buf; return 0; } static int scf0403_spi_transfer(struct spi_slave *spi, struct scf0403_cmd *cmd) { int i, error; u32 command = cmd->cmd; u32 msg; error = spi_set_wordlen(spi, 9); if (error) return error; error = spi_xfer(spi, 9, &command, NULL, SPI_XFER_ONCE); if (error) return error; for (i = 0; i < cmd->count; i++) { msg = (cmd->params[i] | 0x100); error = spi_xfer(spi, 9, &msg, NULL, SPI_XFER_ONCE); if (error) return error; } return 0; } static void scf0403_lcd_init(struct scf0403_priv *priv) { int i; /* reset LCD */ scf0403_gpio_reset(priv->reset_gpio); for (i = 0; i < priv->seq_size; i++) { if (scf0403_spi_transfer(priv->spi, &priv->init_seq[i].cmd) < 0) puts("SPI transfer failed\n"); mdelay(priv->init_seq[i].delay_ms); } } static int scf0403_request_reset_gpio(unsigned gpio) { int err = gpio_request(gpio, "lcd reset"); if (err) return err; err = gpio_direction_output(gpio, 0); if (err) gpio_free(gpio); return err; } int scf0403_init(int reset_gpio) { int error; if (gpio_is_valid(reset_gpio)) { error = scf0403_request_reset_gpio(reset_gpio); if (error) { printf("Failed requesting reset GPIO%d: %d\n", reset_gpio, error); return error; } } priv.reset_gpio = reset_gpio; priv.spi = spi_setup_slave(3, 0, 1000000, SPI_MODE_0); error = spi_claim_bus(priv.spi); if (error) goto bus_claim_fail; /* reset LCD */ scf0403_gpio_reset(reset_gpio); error = scf0403_spi_read_rddid(priv.spi, &priv.rddid); if (error) { puts("IDs read failed\n"); goto readid_fail; } if (priv.rddid == SCF0403852GGU04_ID) { priv.init_seq = scf0403_initseq_sn04; priv.seq_size = ARRAY_SIZE(scf0403_initseq_sn04); } else { priv.init_seq = scf0403_initseq_sn20; priv.seq_size = ARRAY_SIZE(scf0403_initseq_sn20); } scf0403_lcd_init(&priv); /* Start operation */ scf0403_spi_transfer(priv.spi, &scf0403_cmd_dison); mdelay(100); scf0403_spi_transfer(priv.spi, &scf0403_cmd_slpout); spi_release_bus(priv.spi); return 0; readid_fail: spi_release_bus(priv.spi); bus_claim_fail: if (gpio_is_valid(priv.reset_gpio)) gpio_free(priv.reset_gpio); return error; }