// SPDX-License-Identifier: GPL-2.0-only
/* drivers/video/backlight/vgg2432a4.c
*
* VGG2432A4 (ILI9320) LCD controller driver.
*
* Copyright 2007 Simtec Electronics
* http://armlinux.simtec.co.uk/
* Ben Dooks <ben@simtec.co.uk>
*/
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/lcd.h>
#include <linux/module.h>
#include <linux/spi/spi.h>
#include <video/ili9320.h>
#include "ili9320.h"
/* Device initialisation sequences */
static const struct ili9320_reg vgg_init1[] = {
{
.address = ILI9320_POWER1,
.value = ILI9320_POWER1_AP(
0) | ILI9320_POWER1_BT(
0),
}, {
.address = ILI9320_POWER2,
.value = (ILI9320_POWER2_VC(
7) |
ILI9320_POWER2_DC0(
0) | ILI9320_POWER2_DC1(
0)),
}, {
.address = ILI9320_POWER3,
.value = ILI9320_POWER3_VRH(
0),
}, {
.address = ILI9320_POWER4,
.value = ILI9320_POWER4_VREOUT(
0),
},
};
static const struct ili9320_reg vgg_init2[] = {
{
.address = ILI9320_POWER1,
.value = (ILI9320_POWER1_AP(
3) | ILI9320_POWER1_APE |
ILI9320_POWER1_BT(
7) | ILI9320_POWER1_SAP),
}, {
.address = ILI9320_POWER2,
.value = ILI9320_POWER2_VC(
7) | ILI9320_POWER2_DC0(
3),
}
};
static const struct ili9320_reg vgg_gamma[] = {
{
.address = ILI9320_GAMMA1,
.value =
0x0000,
}, {
.address = ILI9320_GAMMA2,
.value =
0x0505,
}, {
.address = ILI9320_GAMMA3,
.value =
0x0004,
}, {
.address = ILI9320_GAMMA4,
.value =
0x0006,
}, {
.address = ILI9320_GAMMA5,
.value =
0x0707,
}, {
.address = ILI9320_GAMMA6,
.value =
0x0105,
}, {
.address = ILI9320_GAMMA7,
.value =
0x0002,
}, {
.address = ILI9320_GAMMA8,
.value =
0x0707,
}, {
.address = ILI9320_GAMMA9,
.value =
0x0704,
}, {
.address = ILI9320_GAMMA10,
.value =
0x807,
}
};
static const struct ili9320_reg vgg_init0[] = {
[
0] = {
/* set direction and scan mode gate */
.address = ILI9320_DRIVER,
.value = ILI9320_DRIVER_SS,
}, {
.address = ILI9320_DRIVEWAVE,
.value = (ILI9320_DRIVEWAVE_MUSTSET |
ILI9320_DRIVEWAVE_EOR | ILI9320_DRIVEWAVE_BC),
}, {
.address = ILI9320_ENTRYMODE,
.value = ILI9320_ENTRYMODE_ID(
3) | ILI9320_ENTRYMODE_BGR,
}, {
.address = ILI9320_RESIZING,
.value =
0x0,
},
};
static int vgg2432a4_lcd_init(
struct ili9320 *lcd,
struct ili9320_platdata *cfg)
{
unsigned int addr;
int ret;
/* Set VCore before anything else (VGG243237-6UFLWA) */
ret = ili9320_write(lcd,
0x00e5,
0x8000);
if (ret)
goto err_initial;
/* Start the oscillator up before we can do anything else. */
ret = ili9320_write(lcd, ILI9320_OSCILATION, ILI9320_OSCILATION_OSC);
if (ret)
goto err_initial;
/* must wait at-lesat 10ms after starting */
mdelay(
15);
ret = ili9320_write_regs(lcd, vgg_init0, ARRAY_SIZE(vgg_init0));
if (ret !=
0)
goto err_initial;
ili9320_write(lcd, ILI9320_DISPLAY2, cfg->display2);
ili9320_write(lcd, ILI9320_DISPLAY3, cfg->display3);
ili9320_write(lcd, ILI9320_DISPLAY4, cfg->display4);
ili9320_write(lcd, ILI9320_RGB_IF1, cfg->rgb_if1);
ili9320_write(lcd, ILI9320_FRAMEMAKER,
0x0);
ili9320_write(lcd, ILI9320_RGB_IF2, cfg->rgb_if2);
ret = ili9320_write_regs(lcd, vgg_init1, ARRAY_SIZE(vgg_init1));
if (ret !=
0)
goto err_vgg;
mdelay(
300);
ret = ili9320_write_regs(lcd, vgg_init2, ARRAY_SIZE(vgg_init2));
if (ret !=
0)
goto err_vgg2;
mdelay(
100);
ili9320_write(lcd, ILI9320_POWER3,
0x13c);
mdelay(
100);
ili9320_write(lcd, ILI9320_POWER4,
0x1c00);
ili9320_write(lcd, ILI9320_POWER7,
0x000e);
mdelay(
100);
ili9320_write(lcd, ILI9320_GRAM_HORIZ_ADDR,
0x00);
ili9320_write(lcd, ILI9320_GRAM_VERT_ADD,
0x00);
ret = ili9320_write_regs(lcd, vgg_gamma, ARRAY_SIZE(vgg_gamma));
if (ret !=
0)
goto err_vgg3;
ili9320_write(lcd, ILI9320_HORIZ_START,
0x0);
ili9320_write(lcd, ILI9320_HORIZ_END, cfg->hsize -
1);
ili9320_write(lcd, ILI9320_VERT_START,
0x0);
ili9320_write(lcd, ILI9320_VERT_END, cfg->vsize -
1);
ili9320_write(lcd, ILI9320_DRIVER2,
ILI9320_DRIVER2_NL(((cfg->vsize -
240) /
8) +
0x1D));
ili9320_write(lcd, ILI9320_BASE_IMAGE,
0x1);
ili9320_write(lcd, ILI9320_VERT_SCROLL,
0x00);
for (addr = ILI9320_PARTIAL1_POSITION; addr <= ILI9320_PARTIAL2_END;
addr++) {
ili9320_write(lcd, addr,
0x0);
}
ili9320_write(lcd, ILI9320_INTERFACE1,
0x10);
ili9320_write(lcd, ILI9320_INTERFACE2, cfg->interface2);
ili9320_write(lcd, ILI9320_INTERFACE3, cfg->interface3);
ili9320_write(lcd, ILI9320_INTERFACE4, cfg->interface4);
ili9320_write(lcd, ILI9320_INTERFACE5, cfg->interface5);
ili9320_write(lcd, ILI9320_INTERFACE6, cfg->interface6);
lcd->display1 = (ILI9320_DISPLAY1_D(
3) | ILI9320_DISPLAY1_DTE |
ILI9320_DISPLAY1_GON | ILI9320_DISPLAY1_BASEE |
0x40);
ili9320_write(lcd, ILI9320_DISPLAY1, lcd->display1);
return 0;
err_vgg3:
err_vgg2:
err_vgg:
err_initial:
return ret;
}
#ifdef CONFIG_PM_SLEEP
static int vgg2432a4_suspend(
struct device *dev)
{
return ili9320_suspend(dev_get_drvdata(dev));
}
static int vgg2432a4_resume(
struct device *dev)
{
return ili9320_resume(dev_get_drvdata(dev));
}
#endif
static struct ili9320_client vgg2432a4_client = {
.name =
"VGG2432A4",
.init = vgg2432a4_lcd_init,
};
/* Device probe */
static int vgg2432a4_probe(
struct spi_device *spi)
{
int ret;
ret = ili9320_probe_spi(spi, &vgg2432a4_client);
if (ret !=
0) {
dev_err(&spi->dev,
"failed to initialise ili9320\n");
return ret;
}
return 0;
}
static void vgg2432a4_remove(
struct spi_device *spi)
{
ili9320_remove(spi_get_drvdata(spi));
}
static void vgg2432a4_shutdown(
struct spi_device *spi)
{
ili9320_shutdown(spi_get_drvdata(spi));
}
static SIMPLE_DEV_PM_OPS(vgg2432a4_pm_ops, vgg2432a4_suspend, vgg2432a4_resume);
static struct spi_driver vgg2432a4_driver = {
.driver = {
.name =
"VGG2432A4",
.pm = &vgg2432a4_pm_ops,
},
.probe = vgg2432a4_probe,
.remove = vgg2432a4_remove,
.shutdown = vgg2432a4_shutdown,
};
module_spi_driver(vgg2432a4_driver);
MODULE_AUTHOR(
"Ben Dooks <ben-linux@fluff.org>");
MODULE_DESCRIPTION(
"VGG2432A4 LCD Driver");
MODULE_LICENSE(
"GPL v2");
MODULE_ALIAS(
"spi:VGG2432A4");