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wifipineapple-openwrt/target/linux/xburst/patches-2.6.35/101-lcm.patch

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From 2e27414748a56d8583c151d926da54e7e9d2c23f Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Sun, 1 Aug 2010 21:19:40 +0200
Subject: [PATCH] Add ili8960 lcd driver
---
drivers/video/backlight/Kconfig | 7 +
drivers/video/backlight/Makefile | 1 +
drivers/video/backlight/ili8960.c | 254 +++++++++++++++++++++++++++++++++++++
3 files changed, 262 insertions(+), 0 deletions(-)
create mode 100644 drivers/video/backlight/ili8960.c
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -59,6 +59,13 @@ config LCD_LTV350QV
The LTV350QV panel is present on all ATSTK1000 boards.
+config LCD_ILI8960
+ tristate "Ilitek ili8960 LCD driver"
+ depends on LCD_CLASS_DEVICE && SPI
+ default n
+ help
+ Driver for the Ilitek ili8960 LCD controller chip.
+
config LCD_ILI9320
tristate
help
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_LCD_HP700) += jornada72
obj-$(CONFIG_LCD_L4F00242T03) += l4f00242t03.o
obj-$(CONFIG_LCD_LMS283GF05) += lms283gf05.o
obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o
+obj-$(CONFIG_LCD_ILI8960) += ili8960.o
obj-$(CONFIG_LCD_ILI9320) += ili9320.o
obj-$(CONFIG_LCD_PLATFORM) += platform_lcd.o
obj-$(CONFIG_LCD_VGG2432A4) += vgg2432a4.o
--- /dev/null
+++ b/drivers/video/backlight/ili8960.c
@@ -0,0 +1,254 @@
+/*
+ * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
+ * Driver for Ilitek ili8960 LCD
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/lcd.h>
+#include <linux/backlight.h>
+#include <linux/delay.h>
+
+struct ili8960 {
+ struct spi_device *spi;
+ struct lcd_device *lcd;
+ struct backlight_device *bl;
+ unsigned enabled:1;
+};
+
+static int ili8960_write_reg(struct spi_device *spi, uint8_t reg,
+ uint8_t data)
+{
+ uint8_t buf[2];
+ buf[0] = ((reg & 0x40) << 1) | (reg & 0x3f);
+ buf[1] = data;
+
+ return spi_write(spi, buf, sizeof(buf));
+}
+
+static void ili8960_power_disable(struct spi_device *spi)
+{
+ int ret = ili8960_write_reg(spi, 0x5, 0xc6) ;
+ if (ret < 0)
+ dev_err(&spi->dev, "Failed to disable power: %d\n", ret);
+}
+
+static void ili8960_power_enable(struct spi_device *spi)
+{
+ ili8960_write_reg(spi, 0x5, 0xc7);
+}
+
+
+static int ili8960_set_power(struct lcd_device *lcd, int power)
+{
+ struct ili8960 *ili8960 = lcd_get_data(lcd);
+
+ switch (power) {
+ case FB_BLANK_UNBLANK:
+ mdelay(20);
+ ili8960->enabled = 1;
+ ili8960_power_enable(ili8960->spi);
+ break;
+ default:
+ ili8960->enabled = 0;
+ ili8960_power_disable(ili8960->spi);
+ mdelay(20);
+ break;
+ }
+ return 0;
+}
+
+static int ili8960_set_contrast(struct lcd_device *lcd, int contrast)
+{
+ struct ili8960 *ili8960 = lcd_get_data(lcd);
+ ili8960_write_reg(ili8960->spi, 0x0d, contrast);
+ return 0;
+}
+
+static int ili8960_set_mode(struct lcd_device *lcd, struct fb_videomode *mode)
+{
+ if (mode->xres != 320 && mode->yres != 240)
+ return -EINVAL;
+
+ return 0;
+}
+
+static ssize_t reg_write(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ char *buf2;
+ uint32_t reg = simple_strtoul(buf, &buf2, 10);
+ uint32_t val = simple_strtoul(buf2 + 1, NULL, 10);
+ struct ili8960 *ili8960 = dev_get_drvdata(dev);
+
+ if (reg < 0 || val < 0)
+ return -EINVAL;
+
+ ili8960_write_reg(ili8960->spi, reg, val);
+ return count;
+}
+
+static DEVICE_ATTR(reg, 0644, NULL, reg_write);
+
+static ssize_t ili8960_show_brightness(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int rc = -ENXIO;
+
+ return rc;
+}
+
+static ssize_t ili8960_store_brightness(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ char *endp;
+ struct lcd_device *ld = to_lcd_device(dev);
+ struct ili8960 *ili8960 = lcd_get_data(ld);
+ int brightness = simple_strtoul(buf, &endp, 0);
+
+ if (brightness > 255 || brightness < 0)
+ return -EINVAL;
+
+ ili8960_write_reg(ili8960->spi, 0x3, brightness);
+
+ return count;
+}
+
+
+static DEVICE_ATTR(brightness, 0644, ili8960_show_brightness,
+ ili8960_store_brightness);
+
+static struct lcd_ops ili8960_lcd_ops = {
+ .set_power = ili8960_set_power,
+ .set_contrast = ili8960_set_contrast,
+ .set_mode = ili8960_set_mode,
+};
+
+static int __devinit ili8960_probe(struct spi_device *spi)
+{
+ int ret;
+ struct ili8960 *ili8960;
+
+ ili8960 = kmalloc(sizeof(*ili8960), GFP_KERNEL);
+
+ spi->bits_per_word = 8;
+ spi->mode = SPI_MODE_3 | SPI_3WIRE;
+
+ ret = spi_setup(spi);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to setup spi\n");
+ goto err_free_ili8960;
+ }
+
+ ili8960->spi = spi;
+
+ ili8960->lcd = lcd_device_register("ili8960-lcd", &spi->dev, ili8960,
+ &ili8960_lcd_ops);
+
+ if (IS_ERR(ili8960->lcd)) {
+ ret = PTR_ERR(ili8960->lcd);
+ dev_err(&spi->dev, "Failed to register lcd device: %d\n", ret);
+ goto err_free_ili8960;
+ }
+
+ ili8960->lcd->props.max_contrast = 255;
+
+ ret = device_create_file(&spi->dev, &dev_attr_reg);
+ if (ret)
+ goto err_unregister_lcd;
+
+ ret = device_create_file(&ili8960->lcd->dev, &dev_attr_brightness);
+ if (ret)
+ goto err_unregister_lcd;
+
+ ili8960->enabled = 1;
+ dev_set_drvdata(&spi->dev, ili8960);
+
+ ili8960_write_reg(spi, 0x13, 0x01);
+ ili8960_write_reg(spi, 0x5, 0xc7);
+
+ return 0;
+err_unregister_lcd:
+ lcd_device_unregister(ili8960->lcd);
+err_free_ili8960:
+ kfree(ili8960);
+ return ret;
+}
+
+static int __devexit ili8960_remove(struct spi_device *spi)
+{
+ struct ili8960 *ili8960 = spi_get_drvdata(spi);
+#if 0
+ if (ili8960->bl)
+ backlight_device_unregister(ili8960->bl);
+#endif
+
+ lcd_device_unregister(ili8960->lcd);
+
+ spi_set_drvdata(spi, NULL);
+ kfree(ili8960);
+ return 0;
+}
+
+#ifdef CONFIG_PM
+
+static int ili8960_suspend(struct spi_device *spi, pm_message_t state)
+{
+ struct ili8960 *ili8960 = spi_get_drvdata(spi);
+ if (ili8960->enabled) {
+ ili8960_power_disable(spi);
+ mdelay(10);
+ }
+ return 0;
+}
+
+static int ili8960_resume(struct spi_device *spi)
+{
+ struct ili8960 *ili8960 = spi_get_drvdata(spi);
+ if (ili8960->enabled)
+ ili8960_power_enable(spi);
+ return 0;
+}
+
+#else
+#define ili8960_suspend NULL
+#define ili8960_resume NULL
+#endif
+
+static struct spi_driver ili8960_driver = {
+ .driver = {
+ .name = "ili8960",
+ .owner = THIS_MODULE,
+ },
+ .probe = ili8960_probe,
+ .remove = __devexit_p(ili8960_remove),
+ .suspend = ili8960_suspend,
+ .resume = ili8960_resume,
+};
+
+static int __init ili8960_init(void)
+{
+ return spi_register_driver(&ili8960_driver);
+}
+module_init(ili8960_init);
+
+static void __exit ili8960_exit(void)
+{
+ return spi_unregister_driver(&ili8960_driver);
+}
+module_exit(ili8960_exit)
+
+MODULE_AUTHOR("Lars-Peter Clausen");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("LCD driver for Ilitek ili8960");
+MODULE_ALIAS("spi:ili8960");
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