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u-boot/drivers/video/scf0403_lcd.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

295 lines
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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 <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;
}
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