| // 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; |
| } |
