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Diffstat (limited to 'recipes/linux/linux-2.6.18/ltv350qv-lcd-driver.patch')
-rw-r--r--recipes/linux/linux-2.6.18/ltv350qv-lcd-driver.patch355
1 files changed, 355 insertions, 0 deletions
diff --git a/recipes/linux/linux-2.6.18/ltv350qv-lcd-driver.patch b/recipes/linux/linux-2.6.18/ltv350qv-lcd-driver.patch
new file mode 100644
index 0000000000..ce0250e3fd
--- /dev/null
+++ b/recipes/linux/linux-2.6.18/ltv350qv-lcd-driver.patch
@@ -0,0 +1,355 @@
+From nobody Mon Sep 17 00:00:00 2001
+From: Håvard Skinnemoen <hskinnemoen@atmel.com>
+Date: Wed Dec 21 14:52:09 2005 +0100
+Subject: [PATCH] LTV350QV LCD driver
+
+This patch adds support for powering on and off the Samsung LTV350QV
+LCD panel via SPI. The driver responds to framebuffer power management,
+it powers off the panel on reboot/halt/poweroff, and it can also be
+controlled through sysfs. The panel is powered up when the module is
+loaded and off when the module is unloaded.
+
+---
+ drivers/video/backlight/Kconfig | 12 +
+ drivers/video/backlight/Makefile | 1
+ drivers/video/backlight/ltv350qv.c | 301 +++++++++++++++++++++++++++++++++++++
+ 3 files changed, 314 insertions(+)
+
+Index: linux-2.6.18-avr32/drivers/video/backlight/Kconfig
+===================================================================
+--- linux-2.6.18-avr32.orig/drivers/video/backlight/Kconfig 2006-09-11 20:30:16.000000000 +0200
++++ linux-2.6.18-avr32/drivers/video/backlight/Kconfig 2006-09-11 20:31:24.000000000 +0200
+@@ -42,6 +42,18 @@ config LCD_DEVICE
+ depends on LCD_CLASS_DEVICE
+ default y
+
++config LCD_LTV350QV
++ tristate "Samsung LTV350QV LCD Panel"
++ depends on LCD_DEVICE && SPI
++ default n
++ help
++ If you have a Samsung LTV350QV LCD panel, say y to include a
++ power control driver for it. The panel starts up in power
++ off state, so you need this driver in order to see any
++ output.
++
++ The LTV350QV panel is present on most ATSTK1000 boards.
++
+ config BACKLIGHT_CORGI
+ tristate "Sharp Corgi Backlight Driver (SL Series)"
+ depends on BACKLIGHT_DEVICE && PXA_SHARPSL
+Index: linux-2.6.18-avr32/drivers/video/backlight/Makefile
+===================================================================
+--- linux-2.6.18-avr32.orig/drivers/video/backlight/Makefile 2006-09-11 20:30:23.000000000 +0200
++++ linux-2.6.18-avr32/drivers/video/backlight/Makefile 2006-09-11 20:31:24.000000000 +0200
+@@ -5,3 +5,4 @@ obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) +=
+ obj-$(CONFIG_BACKLIGHT_CORGI) += corgi_bl.o
+ obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o
+ obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o
++obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o
+Index: linux-2.6.18-avr32/drivers/video/backlight/ltv350qv.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.18-avr32/drivers/video/backlight/ltv350qv.c 2006-09-11 20:31:24.000000000 +0200
+@@ -0,0 +1,301 @@
++/*
++ * Power control for Samsung LTV350QV Quarter VGA LCD Panel
++ *
++ * Copyright (C) 2006 Atmel Corporation
++ *
++ * 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/config.h>
++#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/reboot.h>
++#include <linux/spi/spi.h>
++
++#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL)
++
++struct ltv350qv {
++ struct spi_device *spi;
++ u8 *buffer;
++ int power;
++ struct semaphore lock;
++ struct lcd_device *ld;
++ struct list_head list;
++ int halt_done;
++};
++
++static LIST_HEAD(lcd_list);
++
++static int ltv350qv_write_reg(struct ltv350qv *lcd, u8 reg, u16 val)
++{
++ struct spi_message msg;
++ struct spi_transfer index_xfer = {
++ .len = 3,
++ .cs_change = 1,
++ };
++ struct spi_transfer value_xfer = {
++ .len = 3,
++ .cs_change = 1,
++ };
++
++ spi_message_init(&msg);
++
++ /* register index */
++ lcd->buffer[0] = 0x74;
++ lcd->buffer[1] = 0x00;
++ lcd->buffer[2] = reg & 0x7f;
++ index_xfer.tx_buf = lcd->buffer;
++ spi_message_add_tail(&index_xfer, &msg);
++
++ /* register value */
++ lcd->buffer[4] = 0x76;
++ lcd->buffer[5] = val >> 8;
++ lcd->buffer[6] = val;
++ value_xfer.tx_buf = lcd->buffer + 4;
++ spi_message_add_tail(&value_xfer, &msg);
++
++ return spi_sync(lcd->spi, &msg);
++}
++
++#define write_reg(_spi, reg, val) \
++ do { \
++ ret = ltv350qv_write_reg(_spi, reg, val); \
++ if (ret) \
++ goto out; \
++ } while (0)
++
++static int ltv350qv_power_on(struct ltv350qv *lcd)
++{
++ int ret;
++
++ write_reg(lcd, 9, 0x0000);
++ msleep(15);
++ write_reg(lcd, 9, 0x4000);
++ write_reg(lcd, 10, 0x2000);
++ write_reg(lcd, 9, 0x4055);
++ msleep(55);
++ write_reg(lcd, 1, 0x409d);
++ write_reg(lcd, 2, 0x0204);
++ write_reg(lcd, 3, 0x0100);
++ write_reg(lcd, 4, 0x3000);
++ write_reg(lcd, 5, 0x4003);
++ write_reg(lcd, 6, 0x000a);
++ write_reg(lcd, 7, 0x0021);
++ write_reg(lcd, 8, 0x0c00);
++ write_reg(lcd, 10, 0x0103);
++ write_reg(lcd, 11, 0x0301);
++ write_reg(lcd, 12, 0x1f0f);
++ write_reg(lcd, 13, 0x1f0f);
++ write_reg(lcd, 14, 0x0707);
++ write_reg(lcd, 15, 0x0307);
++ write_reg(lcd, 16, 0x0707);
++ write_reg(lcd, 17, 0x0000);
++ write_reg(lcd, 18, 0x0004);
++ write_reg(lcd, 19, 0x0000);
++
++ msleep(20);
++ write_reg(lcd, 9, 0x4a55);
++ write_reg(lcd, 5, 0x5003);
++
++out:
++ return ret;
++}
++
++static int ltv350qv_power_off(struct ltv350qv *lcd)
++{
++ int ret;
++
++ /* GON -> 0, POC -> 0 */
++ write_reg(lcd, 9, 0x4055);
++ /* DSC -> 0 */
++ write_reg(lcd, 5, 0x4003);
++ /* VCOMG -> 0 */
++ write_reg(lcd, 10, 0x2103);
++
++ msleep(1);
++
++ /* AP[2:0] -> 000 */
++ write_reg(lcd, 9, 0x4050);
++
++out:
++ return ret;
++}
++
++static int ltv350qv_power(struct ltv350qv *lcd, int power)
++{
++ int ret = 0;
++
++ down(&lcd->lock);
++
++ if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))
++ ret = ltv350qv_power_on(lcd);
++ else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))
++ ret = ltv350qv_power_off(lcd);
++
++ if (!ret)
++ lcd->power = power;
++
++ up(&lcd->lock);
++
++ return ret;
++}
++
++static int ltv350qv_set_power(struct lcd_device *ld, int power)
++{
++ struct ltv350qv *lcd;
++
++ lcd = class_get_devdata(&ld->class_dev);
++ return ltv350qv_power(lcd, power);
++}
++
++static int ltv350qv_get_power(struct lcd_device *ld)
++{
++ struct ltv350qv *lcd;
++
++ lcd = class_get_devdata(&ld->class_dev);
++ return lcd->power;
++}
++
++static struct lcd_properties lcd_properties = {
++ .owner = THIS_MODULE,
++ .get_power = ltv350qv_get_power,
++ .set_power = ltv350qv_set_power,
++};
++
++static int __devinit ltv350qv_probe(struct spi_device *spi)
++{
++ struct ltv350qv *lcd;
++ struct lcd_device *ld;
++ int ret;
++
++ lcd = kzalloc(sizeof(struct ltv350qv), GFP_KERNEL);
++ if (!lcd)
++ return -ENOMEM;
++
++ lcd->spi = spi;
++ lcd->power = FB_BLANK_POWERDOWN;
++ init_MUTEX(&lcd->lock);
++ lcd->buffer = kzalloc(8, GFP_KERNEL);
++
++ spi->mode = SPI_MODE_3;
++ spi->bits_per_word = 8;
++ ret = spi_setup(spi);
++ if (ret)
++ goto out_free_lcd;
++
++ ld = lcd_device_register("ltv350qv", lcd, &lcd_properties);
++ if (IS_ERR(ld)) {
++ ret = PTR_ERR(ld);
++ goto out_free_lcd;
++ }
++ lcd->ld = ld;
++
++ list_add(&lcd->list, &lcd_list);
++
++ ret = ltv350qv_power(lcd, FB_BLANK_UNBLANK);
++ if (ret)
++ goto out_unregister;
++
++ dev_set_drvdata(&spi->dev, lcd);
++
++ return 0;
++
++out_unregister:
++ lcd_device_unregister(ld);
++out_free_lcd:
++ kfree(lcd);
++ return ret;
++}
++
++static int __devexit ltv350qv_remove(struct spi_device *spi)
++{
++ struct ltv350qv *lcd = dev_get_drvdata(&spi->dev);
++
++ ltv350qv_power(lcd, FB_BLANK_POWERDOWN);
++ list_del(&lcd->list);
++ lcd_device_unregister(lcd->ld);
++ kfree(lcd);
++
++ return 0;
++}
++
++#ifdef CONFIG_PM
++static int ltv350qv_suspend(struct spi_device *spi,
++ pm_message_t state, u32 level)
++{
++ struct ltv350qv *lcd = dev_get_drvdata(&spi->dev);
++
++ if (level == SUSPEND_POWER_DOWN)
++ return ltv350qv_power(lcd, FB_BLANK_POWERDOWN);
++
++ return 0;
++}
++
++static int ltv350qv_resume(struct spi_device *spi, u32 level)
++{
++ struct ltv350qv *lcd = dev_get_drvdata(&spi->dev);
++
++ if (level == RESUME_POWER_ON)
++ return ltv350qv_power(lcd, FB_BLANK_UNBLANK);
++
++ return 0;
++}
++#else
++#define ltv350qv_suspend NULL
++#define ltv350qv_resume NULL
++#endif
++
++/* Power down all displays on reboot, poweroff or halt */
++static int ltv350qv_halt(struct notifier_block *nb, unsigned long event,
++ void *p)
++{
++ struct ltv350qv *lcd;
++
++ list_for_each_entry(lcd, &lcd_list, list) {
++ if (!lcd->halt_done)
++ ltv350qv_power(lcd, FB_BLANK_POWERDOWN);
++ lcd->halt_done = 1;
++ }
++
++ return NOTIFY_OK;
++}
++
++static struct spi_driver ltv350qv_driver = {
++ .driver = {
++ .name = "ltv350qv",
++ .bus = &spi_bus_type,
++ .owner = THIS_MODULE,
++ },
++
++ .probe = ltv350qv_probe,
++ .remove = __devexit_p(ltv350qv_remove),
++ .suspend = ltv350qv_suspend,
++ .resume = ltv350qv_resume,
++};
++
++static struct notifier_block ltv350qv_notifier = {
++ .notifier_call = ltv350qv_halt,
++};
++
++static int __init ltv350qv_init(void)
++{
++ register_reboot_notifier(&ltv350qv_notifier);
++ return spi_register_driver(&ltv350qv_driver);
++}
++
++static void __exit ltv350qv_exit(void)
++{
++ unregister_reboot_notifier(&ltv350qv_notifier);
++ spi_unregister_driver(&ltv350qv_driver);
++}
++module_init(ltv350qv_init);
++module_exit(ltv350qv_exit);
++
++MODULE_AUTHOR("Atmel Norway");
++MODULE_DESCRIPTION("Samsung LTV350QV LCD Driver");
++MODULE_LICENSE("GPL");
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