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// 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 <malloc.h>
#include <asm/gpio.h>
#include <spi.h>
#include <linux/delay.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;
}
|
