fb: add support for the ILI9320 video display controller

Provide support for the ILI9320 display controller chip which is found in
many LCD displays.  Included with this is support for an example LCD using
this chip, the VGG2432A4.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 284 insertions, 0 deletions

diff --git a/drivers/video/backlight/vgg2432a4.c b/drivers/video/backlight/vgg2432a4.c
new file mode 100644
index 000000000000..593c7687d54a
--- /dev/null
+++ b/drivers/video/backlight/vgg2432a4.c
@@ -0,0 +1,284 @@
+/* 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>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/fb.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 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 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 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 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, ILI9320_RGBIF2_DPL);
+
+        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
+static int vgg2432a4_suspend(struct spi_device *spi, pm_message_t state)
+{
+        return ili9320_suspend(dev_get_drvdata(&spi->dev), state);
+}
+
+static int vgg2432a4_resume(struct spi_device *spi)
+{
+        return ili9320_resume(dev_get_drvdata(&spi->dev));
+}
+#else
+#define vgg2432a4_suspend       NULL
+#define vgg2432a4_resume        NULL
+#endif
+
+static struct ili9320_client vgg2432a4_client = {
+        .name   = "VGG2432A4",
+        .init   = vgg2432a4_lcd_init,
+};
+
+/* Device probe */
+
+static int __devinit 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 int __devexit vgg2432a4_remove(struct spi_device *spi)
+{
+        return ili9320_remove(dev_get_drvdata(&spi->dev));
+}
+
+static void vgg2432a4_shutdown(struct spi_device *spi)
+{
+        ili9320_shutdown(dev_get_drvdata(&spi->dev));
+}
+
+static struct spi_driver vgg2432a4_driver = {
+        .driver = {
+                .name           = "VGG2432A4",
+                .owner          = THIS_MODULE,
+        },
+        .probe          = vgg2432a4_probe,
+        .remove         = __devexit_p(vgg2432a4_remove),
+        .shutdown       = vgg2432a4_shutdown,
+        .suspend        = vgg2432a4_suspend,
+        .resume         = vgg2432a4_resume,
+};
+
+/* Device driver initialisation */
+
+static int __init vgg2432a4_init(void)
+{
+        return spi_register_driver(&vgg2432a4_driver);
+}
+
+static void __exit vgg2432a4_exit(void)
+{
+        spi_unregister_driver(&vgg2432a4_driver);
+}
+
+module_init(vgg2432a4_init);
+module_exit(vgg2432a4_exit);
+
+MODULE_AUTHOR("Ben Dooks <ben-linux@fluff.org>");
+MODULE_DESCRIPTION("VGG2432A4 LCD Driver");
+MODULE_LICENSE("GPL v2");
+
+