// 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");