Creation of Cybook 2416 (actually Gen4) repository

drivers/video/backlight/Kconfig

@@ -0,0 +1,65 @@
+#
+# Backlight & LCD drivers configuration
+#
+
+menuconfig BACKLIGHT_LCD_SUPPORT
+	bool "Backlight & LCD device support"
+	help
+	  Enable this to be able to choose the drivers for controlling the
+	  backlight and the LCD panel on some platforms, for example on PDAs.
+
+config BACKLIGHT_CLASS_DEVICE
+        tristate "Lowlevel Backlight controls"
+	depends on BACKLIGHT_LCD_SUPPORT
+	default m
+	help
+	  This framework adds support for low-level control of the LCD
+          backlight. This includes support for brightness and power.
+
+	  To have support for your specific LCD panel you will have to
+	  select the proper drivers which depend on this option.
+
+config LCD_CLASS_DEVICE
+        tristate "Lowlevel LCD controls"
+	depends on BACKLIGHT_LCD_SUPPORT
+	default m
+	help
+	  This framework adds support for low-level control of LCD.
+	  Some framebuffer devices connect to platform-specific LCD modules
+	  in order to have a platform-specific way to control the flat panel
+	  (contrast and applying power to the LCD (not to the backlight!)).
+
+	  To have support for your specific LCD panel you will have to
+	  select the proper drivers which depend on this option.
+
+config BACKLIGHT_CORGI
+	tristate "Sharp Corgi Backlight Driver (SL Series)"
+	depends on BACKLIGHT_CLASS_DEVICE && PXA_SHARPSL
+	default y
+	help
+	  If you have a Sharp Zaurus SL-C7xx, SL-Cxx00 or SL-6000x say y to enable the
+	  backlight driver.
+
+config BACKLIGHT_LOCOMO
+	tristate "Sharp LOCOMO LCD/Backlight Driver"
+	depends on BACKLIGHT_CLASS_DEVICE && SHARP_LOCOMO
+	default y
+	help
+	  If you have a Sharp Zaurus SL-5500 (Collie) or SL-5600 (Poodle) say y to
+	  enable the LCD/backlight driver.
+
+config BACKLIGHT_HP680
+	tristate "HP Jornada 680 Backlight Driver"
+	depends on BACKLIGHT_CLASS_DEVICE && SH_HP6XX
+	default y
+	help
+	  If you have a HP Jornada 680, say y to enable the
+	  backlight driver.
+
+config BACKLIGHT_PROGEAR
+	tristate "Frontpath ProGear Backlight Driver"
+	depends on BACKLIGHT_CLASS_DEVICE && PCI && X86
+	default n
+	help
+	  If you have a Frontpath ProGear say Y to enable the
+	  backlight driver.

drivers/video/backlight/Makefile

@@ -0,0 +1,8 @@
+# Backlight & LCD drivers
+
+obj-$(CONFIG_LCD_CLASS_DEVICE)     += lcd.o
+obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o
+obj-$(CONFIG_BACKLIGHT_CORGI)	+= corgi_bl.o
+obj-$(CONFIG_BACKLIGHT_HP680)	+= hp680_bl.o
+obj-$(CONFIG_BACKLIGHT_LOCOMO)	+= locomolcd.o
+obj-$(CONFIG_BACKLIGHT_PROGEAR) += progear_bl.o

drivers/video/backlight/backlight.c

@@ -0,0 +1,315 @@
+/*
+ * Backlight Lowlevel Control Abstraction
+ *
+ * Copyright (C) 2003,2004 Hewlett-Packard Company
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/backlight.h>
+#include <linux/notifier.h>
+#include <linux/ctype.h>
+#include <linux/err.h>
+#include <linux/fb.h>
+
+#ifdef CONFIG_PMAC_BACKLIGHT
+#include <asm/backlight.h>
+#endif
+
+#if defined(CONFIG_FB) || (defined(CONFIG_FB_MODULE) && \
+			   defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE))
+/* This callback gets called when something important happens inside a
+ * framebuffer driver. We're looking if that important event is blanking,
+ * and if it is, we're switching backlight power as well ...
+ */
+static int fb_notifier_callback(struct notifier_block *self,
+				unsigned long event, void *data)
+{
+	struct backlight_device *bd;
+	struct fb_event *evdata = data;
+
+	/* If we aren't interested in this event, skip it immediately ... */
+	if (event != FB_EVENT_BLANK && event != FB_EVENT_CONBLANK)
+		return 0;
+
+	bd = container_of(self, struct backlight_device, fb_notif);
+	mutex_lock(&bd->ops_lock);
+	if (bd->ops)
+		if (!bd->ops->check_fb ||
+		    bd->ops->check_fb(evdata->info)) {
+			bd->props.fb_blank = *(int *)evdata->data;
+			backlight_update_status(bd);
+		}
+	mutex_unlock(&bd->ops_lock);
+	return 0;
+}
+
+static int backlight_register_fb(struct backlight_device *bd)
+{
+	memset(&bd->fb_notif, 0, sizeof(bd->fb_notif));
+	bd->fb_notif.notifier_call = fb_notifier_callback;
+
+	return fb_register_client(&bd->fb_notif);
+}
+
+static void backlight_unregister_fb(struct backlight_device *bd)
+{
+	fb_unregister_client(&bd->fb_notif);
+}
+#else
+static inline int backlight_register_fb(struct backlight_device *bd)
+{
+	return 0;
+}
+
+static inline void backlight_unregister_fb(struct backlight_device *bd)
+{
+}
+#endif /* CONFIG_FB */
+
+static ssize_t backlight_show_power(struct class_device *cdev, char *buf)
+{
+	struct backlight_device *bd = to_backlight_device(cdev);
+
+	return sprintf(buf, "%d\n", bd->props.power);
+}
+
+static ssize_t backlight_store_power(struct class_device *cdev, const char *buf, size_t count)
+{
+	int rc = -ENXIO;
+	char *endp;
+	struct backlight_device *bd = to_backlight_device(cdev);
+	int power = simple_strtoul(buf, &endp, 0);
+	size_t size = endp - buf;
+
+	if (*endp && isspace(*endp))
+		size++;
+	if (size != count)
+		return -EINVAL;
+
+	mutex_lock(&bd->ops_lock);
+	if (bd->ops) {
+		pr_debug("backlight: set power to %d\n", power);
+		bd->props.power = power;
+		backlight_update_status(bd);
+		rc = count;
+	}
+	mutex_unlock(&bd->ops_lock);
+
+	return rc;
+}
+
+static ssize_t backlight_show_brightness(struct class_device *cdev, char *buf)
+{
+	struct backlight_device *bd = to_backlight_device(cdev);
+
+	return sprintf(buf, "%d\n", bd->props.brightness);
+}
+
+static ssize_t backlight_store_brightness(struct class_device *cdev, const char *buf, size_t count)
+{
+	int rc = -ENXIO;
+	char *endp;
+	struct backlight_device *bd = to_backlight_device(cdev);
+	int brightness = simple_strtoul(buf, &endp, 0);
+	size_t size = endp - buf;
+
+	if (*endp && isspace(*endp))
+		size++;
+	if (size != count)
+		return -EINVAL;
+
+	mutex_lock(&bd->ops_lock);
+	if (bd->ops) {
+		if (brightness > bd->props.max_brightness)
+			rc = -EINVAL;
+		else {
+			pr_debug("backlight: set brightness to %d\n",
+				 brightness);
+			bd->props.brightness = brightness;
+			backlight_update_status(bd);
+			rc = count;
+		}
+	}
+	mutex_unlock(&bd->ops_lock);
+
+	return rc;
+}
+
+static ssize_t backlight_show_max_brightness(struct class_device *cdev, char *buf)
+{
+	struct backlight_device *bd = to_backlight_device(cdev);
+
+	return sprintf(buf, "%d\n", bd->props.max_brightness);
+}
+
+static ssize_t backlight_show_actual_brightness(struct class_device *cdev,
+						char *buf)
+{
+	int rc = -ENXIO;
+	struct backlight_device *bd = to_backlight_device(cdev);
+
+	mutex_lock(&bd->ops_lock);
+	if (bd->ops && bd->ops->get_brightness)
+		rc = sprintf(buf, "%d\n", bd->ops->get_brightness(bd));
+	mutex_unlock(&bd->ops_lock);
+
+	return rc;
+}
+
+static void backlight_class_release(struct class_device *dev)
+{
+	struct backlight_device *bd = to_backlight_device(dev);
+	kfree(bd);
+}
+
+static struct class backlight_class = {
+	.name = "backlight",
+	.release = backlight_class_release,
+};
+
+#define DECLARE_ATTR(_name,_mode,_show,_store)			\
+{							 	\
+	.attr	= { .name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE },	\
+	.show	= _show,					\
+	.store	= _store,					\
+}
+
+static const struct class_device_attribute bl_class_device_attributes[] = {
+	DECLARE_ATTR(power, 0644, backlight_show_power, backlight_store_power),
+	DECLARE_ATTR(brightness, 0644, backlight_show_brightness,
+		     backlight_store_brightness),
+	DECLARE_ATTR(actual_brightness, 0444, backlight_show_actual_brightness,
+		     NULL),
+	DECLARE_ATTR(max_brightness, 0444, backlight_show_max_brightness, NULL),
+};
+
+/**
+ * backlight_device_register - create and register a new object of
+ *   backlight_device class.
+ * @name: the name of the new object(must be the same as the name of the
+ *   respective framebuffer device).
+ * @devdata: an optional pointer to be stored in the class_device. The
+ *   methods may retrieve it by using class_get_devdata(&bd->class_dev).
+ * @ops: the backlight operations structure.
+ *
+ * Creates and registers new backlight class_device. Returns either an
+ * ERR_PTR() or a pointer to the newly allocated device.
+ */
+struct backlight_device *backlight_device_register(const char *name,
+	struct device *dev,
+	void *devdata,
+	struct backlight_ops *ops)
+{
+	int i, rc;
+	struct backlight_device *new_bd;
+
+	pr_debug("backlight_device_alloc: name=%s\n", name);
+
+	new_bd = kzalloc(sizeof(struct backlight_device), GFP_KERNEL);
+	if (!new_bd)
+		return ERR_PTR(-ENOMEM);
+
+	mutex_init(&new_bd->update_lock);
+	mutex_init(&new_bd->ops_lock);
+	new_bd->ops = ops;
+	new_bd->class_dev.class = &backlight_class;
+	new_bd->class_dev.dev = dev;
+	strlcpy(new_bd->class_dev.class_id, name, KOBJ_NAME_LEN);
+	class_set_devdata(&new_bd->class_dev, devdata);
+
+	rc = class_device_register(&new_bd->class_dev);
+	if (rc) {
+		kfree(new_bd);
+		return ERR_PTR(rc);
+	}
+
+	rc = backlight_register_fb(new_bd);
+	if (rc) {
+		class_device_unregister(&new_bd->class_dev);
+		return ERR_PTR(rc);
+	}
+
+
+	for (i = 0; i < ARRAY_SIZE(bl_class_device_attributes); i++) {
+		rc = class_device_create_file(&new_bd->class_dev,
+					      &bl_class_device_attributes[i]);
+		if (rc) {
+			while (--i >= 0)
+				class_device_remove_file(&new_bd->class_dev,
+							 &bl_class_device_attributes[i]);
+			class_device_unregister(&new_bd->class_dev);
+			/* No need to kfree(new_bd) since release() method was called */
+			return ERR_PTR(rc);
+		}
+	}
+
+#ifdef CONFIG_PMAC_BACKLIGHT
+	mutex_lock(&pmac_backlight_mutex);
+	if (!pmac_backlight)
+		pmac_backlight = new_bd;
+	mutex_unlock(&pmac_backlight_mutex);
+#endif
+
+	return new_bd;
+}
+EXPORT_SYMBOL(backlight_device_register);
+
+/**
+ * backlight_device_unregister - unregisters a backlight device object.
+ * @bd: the backlight device object to be unregistered and freed.
+ *
+ * Unregisters a previously registered via backlight_device_register object.
+ */
+void backlight_device_unregister(struct backlight_device *bd)
+{
+	int i;
+
+	if (!bd)
+		return;
+
+	pr_debug("backlight_device_unregister: name=%s\n", bd->class_dev.class_id);
+
+#ifdef CONFIG_PMAC_BACKLIGHT
+	mutex_lock(&pmac_backlight_mutex);
+	if (pmac_backlight == bd)
+		pmac_backlight = NULL;
+	mutex_unlock(&pmac_backlight_mutex);
+#endif
+
+	for (i = 0; i < ARRAY_SIZE(bl_class_device_attributes); i++)
+		class_device_remove_file(&bd->class_dev,
+					 &bl_class_device_attributes[i]);
+
+	mutex_lock(&bd->ops_lock);
+	bd->ops = NULL;
+	mutex_unlock(&bd->ops_lock);
+
+	backlight_unregister_fb(bd);
+
+	class_device_unregister(&bd->class_dev);
+}
+EXPORT_SYMBOL(backlight_device_unregister);
+
+static void __exit backlight_class_exit(void)
+{
+	class_unregister(&backlight_class);
+}
+
+static int __init backlight_class_init(void)
+{
+	return class_register(&backlight_class);
+}
+
+/*
+ * if this is compiled into the kernel, we need to ensure that the
+ * class is registered before users of the class try to register lcd's
+ */
+postcore_initcall(backlight_class_init);
+module_exit(backlight_class_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jamey Hicks <jamey.hicks@hp.com>, Andrew Zabolotny <zap@homelink.ru>");
+MODULE_DESCRIPTION("Backlight Lowlevel Control Abstraction");

drivers/video/backlight/corgi_bl.c

@@ -0,0 +1,171 @@
+/*
+ *  Backlight Driver for Sharp Zaurus Handhelds (various models)
+ *
+ *  Copyright (c) 2004-2006 Richard Purdie
+ *
+ *  Based on Sharp's 2.4 Backlight Driver
+ *
+ *  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/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/mutex.h>
+#include <linux/fb.h>
+#include <linux/backlight.h>
+#include <asm/arch/sharpsl.h>
+#include <asm/hardware/sharpsl_pm.h>
+
+static int corgibl_intensity;
+static struct backlight_properties corgibl_data;
+static struct backlight_device *corgi_backlight_device;
+static struct corgibl_machinfo *bl_machinfo;
+
+static unsigned long corgibl_flags;
+#define CORGIBL_SUSPENDED     0x01
+#define CORGIBL_BATTLOW       0x02
+
+static int corgibl_send_intensity(struct backlight_device *bd)
+{
+	void (*corgi_kick_batt)(void);
+	int intensity = bd->props.brightness;
+
+	if (bd->props.power != FB_BLANK_UNBLANK)
+		intensity = 0;
+	if (bd->props.fb_blank != FB_BLANK_UNBLANK)
+		intensity = 0;
+	if (corgibl_flags & CORGIBL_SUSPENDED)
+		intensity = 0;
+	if (corgibl_flags & CORGIBL_BATTLOW)
+		intensity &= bl_machinfo->limit_mask;
+
+	bl_machinfo->set_bl_intensity(intensity);
+
+	corgibl_intensity = intensity;
+
+ 	corgi_kick_batt = symbol_get(sharpsl_battery_kick);
+ 	if (corgi_kick_batt) {
+ 		corgi_kick_batt();
+ 		symbol_put(sharpsl_battery_kick);
+ 	}
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int corgibl_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	struct backlight_device *bd = platform_get_drvdata(pdev);
+
+	corgibl_flags |= CORGIBL_SUSPENDED;
+	backlight_update_status(bd);
+	return 0;
+}
+
+static int corgibl_resume(struct platform_device *pdev)
+{
+	struct backlight_device *bd = platform_get_drvdata(pdev);
+
+	corgibl_flags &= ~CORGIBL_SUSPENDED;
+	backlight_update_status(bd);
+	return 0;
+}
+#else
+#define corgibl_suspend	NULL
+#define corgibl_resume	NULL
+#endif
+
+static int corgibl_get_intensity(struct backlight_device *bd)
+{
+	return corgibl_intensity;
+}
+
+/*
+ * Called when the battery is low to limit the backlight intensity.
+ * If limit==0 clear any limit, otherwise limit the intensity
+ */
+void corgibl_limit_intensity(int limit)
+{
+	if (limit)
+		corgibl_flags |= CORGIBL_BATTLOW;
+	else
+		corgibl_flags &= ~CORGIBL_BATTLOW;
+	backlight_update_status(corgi_backlight_device);
+}
+EXPORT_SYMBOL(corgibl_limit_intensity);
+
+
+static struct backlight_ops corgibl_ops = {
+	.get_brightness = corgibl_get_intensity,
+	.update_status  = corgibl_send_intensity,
+};
+
+static int corgibl_probe(struct platform_device *pdev)
+{
+	struct corgibl_machinfo *machinfo = pdev->dev.platform_data;
+
+	bl_machinfo = machinfo;
+	if (!machinfo->limit_mask)
+		machinfo->limit_mask = -1;
+
+	corgi_backlight_device = backlight_device_register ("corgi-bl",
+		&pdev->dev, NULL, &corgibl_ops);
+	if (IS_ERR (corgi_backlight_device))
+		return PTR_ERR (corgi_backlight_device);
+
+	platform_set_drvdata(pdev, corgi_backlight_device);
+
+	corgi_backlight_device->props.max_brightness = machinfo->max_intensity;
+	corgi_backlight_device->props.power = FB_BLANK_UNBLANK;
+	corgi_backlight_device->props.brightness = machinfo->default_intensity;
+	backlight_update_status(corgi_backlight_device);
+
+	printk("Corgi Backlight Driver Initialized.\n");
+	return 0;
+}
+
+static int corgibl_remove(struct platform_device *pdev)
+{
+	struct backlight_device *bd = platform_get_drvdata(pdev);
+
+	corgibl_data.power = 0;
+	corgibl_data.brightness = 0;
+	backlight_update_status(bd);
+
+	backlight_device_unregister(bd);
+
+	printk("Corgi Backlight Driver Unloaded\n");
+	return 0;
+}
+
+static struct platform_driver corgibl_driver = {
+	.probe		= corgibl_probe,
+	.remove		= corgibl_remove,
+	.suspend	= corgibl_suspend,
+	.resume		= corgibl_resume,
+	.driver		= {
+		.name	= "corgi-bl",
+	},
+};
+
+static int __init corgibl_init(void)
+{
+	return platform_driver_register(&corgibl_driver);
+}
+
+static void __exit corgibl_exit(void)
+{
+	platform_driver_unregister(&corgibl_driver);
+}
+
+module_init(corgibl_init);
+module_exit(corgibl_exit);
+
+MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>");
+MODULE_DESCRIPTION("Corgi Backlight Driver");
+MODULE_LICENSE("GPL");

drivers/video/backlight/hp680_bl.c

@@ -0,0 +1,180 @@
+/*
+ *  Backlight Driver for HP Jornada 680
+ *
+ *  Copyright (c) 2005 Andriy Skulysh
+ *
+ *  Based on Sharp's Corgi Backlight Driver
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/fb.h>
+#include <linux/backlight.h>
+
+#include <asm/cpu/dac.h>
+#include <asm/hp6xx.h>
+#include <asm/hd64461.h>
+
+#define HP680_MAX_INTENSITY 255
+#define HP680_DEFAULT_INTENSITY 10
+
+static int hp680bl_suspended;
+static int current_intensity = 0;
+static DEFINE_SPINLOCK(bl_lock);
+
+static void hp680bl_send_intensity(struct backlight_device *bd)
+{
+	unsigned long flags;
+	u16 v;
+	int intensity = bd->props.brightness;
+
+	if (bd->props.power != FB_BLANK_UNBLANK)
+		intensity = 0;
+	if (bd->props.fb_blank != FB_BLANK_UNBLANK)
+		intensity = 0;
+	if (hp680bl_suspended)
+		intensity = 0;
+
+	spin_lock_irqsave(&bl_lock, flags);
+	if (intensity && current_intensity == 0) {
+		sh_dac_enable(DAC_LCD_BRIGHTNESS);
+		v = inw(HD64461_GPBDR);
+		v &= ~HD64461_GPBDR_LCDOFF;
+		outw(v, HD64461_GPBDR);
+		sh_dac_output(255-(u8)intensity, DAC_LCD_BRIGHTNESS);
+	} else if (intensity == 0 && current_intensity != 0) {
+		sh_dac_output(255-(u8)intensity, DAC_LCD_BRIGHTNESS);
+		sh_dac_disable(DAC_LCD_BRIGHTNESS);
+		v = inw(HD64461_GPBDR);
+		v |= HD64461_GPBDR_LCDOFF;
+		outw(v, HD64461_GPBDR);
+	} else if (intensity) {
+		sh_dac_output(255-(u8)intensity, DAC_LCD_BRIGHTNESS);
+	}
+	spin_unlock_irqrestore(&bl_lock, flags);
+
+	current_intensity = intensity;
+}
+
+
+#ifdef CONFIG_PM
+static int hp680bl_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	struct backlight_device *bd = platform_get_drvdata(pdev);
+
+	hp680bl_suspended = 1;
+	hp680bl_send_intensity(bd);
+	return 0;
+}
+
+static int hp680bl_resume(struct platform_device *pdev)
+{
+	struct backlight_device *bd = platform_get_drvdata(pdev);
+
+	hp680bl_suspended = 0;
+	hp680bl_send_intensity(bd);
+	return 0;
+}
+#else
+#define hp680bl_suspend	NULL
+#define hp680bl_resume	NULL
+#endif
+
+static int hp680bl_set_intensity(struct backlight_device *bd)
+{
+	hp680bl_send_intensity(bd);
+	return 0;
+}
+
+static int hp680bl_get_intensity(struct backlight_device *bd)
+{
+	return current_intensity;
+}
+
+static struct backlight_ops hp680bl_ops = {
+	.get_brightness = hp680bl_get_intensity,
+	.update_status  = hp680bl_set_intensity,
+};
+
+static int __init hp680bl_probe(struct platform_device *pdev)
+{
+	struct backlight_device *bd;
+
+	bd = backlight_device_register ("hp680-bl", &pdev->dev, NULL,
+		    &hp680bl_ops);
+	if (IS_ERR(bd))
+		return PTR_ERR(bd);
+
+	platform_set_drvdata(pdev, bd);
+
+	bd->props.max_brightness = HP680_MAX_INTENSITY;
+	bd->props.brightness = HP680_DEFAULT_INTENSITY;
+	hp680bl_send_intensity(bd);
+
+	return 0;
+}
+
+static int hp680bl_remove(struct platform_device *pdev)
+{
+	struct backlight_device *bd = platform_get_drvdata(pdev);
+
+	hp680bl_data.brightness = 0;
+	hp680bl_data.power = 0;
+	hp680bl_send_intensity(bd);
+
+	backlight_device_unregister(bd);
+
+	return 0;
+}
+
+static struct platform_driver hp680bl_driver = {
+	.probe		= hp680bl_probe,
+	.remove		= hp680bl_remove,
+	.suspend	= hp680bl_suspend,
+	.resume		= hp680bl_resume,
+	.driver		= {
+		.name	= "hp680-bl",
+	},
+};
+
+static struct platform_device *hp680bl_device;
+
+static int __init hp680bl_init(void)
+{
+	int ret;
+
+	ret = platform_driver_register(&hp680bl_driver);
+	if (!ret) {
+		hp680bl_device = platform_device_alloc("hp680-bl", -1);
+		if (!hp680bl_device)
+			return -ENOMEM;
+
+		ret = platform_device_add(hp680bl_device);
+
+		if (ret) {
+			platform_device_put(hp680bl_device);
+			platform_driver_unregister(&hp680bl_driver);
+		}
+	}
+	return ret;
+}
+
+static void __exit hp680bl_exit(void)
+{
+	platform_device_unregister(hp680bl_device);
+ 	platform_driver_unregister(&hp680bl_driver);
+}
+
+module_init(hp680bl_init);
+module_exit(hp680bl_exit);
+
+MODULE_AUTHOR("Andriy Skulysh <askulysh@gmail.com>");
+MODULE_DESCRIPTION("HP Jornada 680 Backlight Driver");
+MODULE_LICENSE("GPL");

drivers/video/backlight/lcd.c

@@ -0,0 +1,276 @@
+/*
+ * LCD Lowlevel Control Abstraction
+ *
+ * Copyright (C) 2003,2004 Hewlett-Packard Company
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/lcd.h>
+#include <linux/notifier.h>
+#include <linux/ctype.h>
+#include <linux/err.h>
+#include <linux/fb.h>
+
+#if defined(CONFIG_FB) || (defined(CONFIG_FB_MODULE) && \
+			   defined(CONFIG_LCD_CLASS_DEVICE_MODULE))
+/* This callback gets called when something important happens inside a
+ * framebuffer driver. We're looking if that important event is blanking,
+ * and if it is, we're switching lcd power as well ...
+ */
+static int fb_notifier_callback(struct notifier_block *self,
+				 unsigned long event, void *data)
+{
+	struct lcd_device *ld;
+	struct fb_event *evdata = data;
+
+	/* If we aren't interested in this event, skip it immediately ... */
+	if (event != FB_EVENT_BLANK)
+		return 0;
+
+	ld = container_of(self, struct lcd_device, fb_notif);
+	mutex_lock(&ld->ops_lock);
+	if (ld->ops)
+		if (!ld->ops->check_fb || ld->ops->check_fb(evdata->info))
+			ld->ops->set_power(ld, *(int *)evdata->data);
+	mutex_unlock(&ld->ops_lock);
+	return 0;
+}
+
+static int lcd_register_fb(struct lcd_device *ld)
+{
+	memset(&ld->fb_notif, 0, sizeof(&ld->fb_notif));
+	ld->fb_notif.notifier_call = fb_notifier_callback;
+	return fb_register_client(&ld->fb_notif);
+}
+
+static void lcd_unregister_fb(struct lcd_device *ld)
+{
+	fb_unregister_client(&ld->fb_notif);
+}
+#else
+static int lcd_register_fb(struct lcd_device *ld)
+{
+	return 0;
+}
+
+static inline void lcd_unregister_fb(struct lcd_device *ld)
+{
+}
+#endif /* CONFIG_FB */
+
+static ssize_t lcd_show_power(struct class_device *cdev, char *buf)
+{
+	int rc;
+	struct lcd_device *ld = to_lcd_device(cdev);
+
+	mutex_lock(&ld->ops_lock);
+	if (ld->ops && ld->ops->get_power)
+		rc = sprintf(buf, "%d\n", ld->ops->get_power(ld));
+	else
+		rc = -ENXIO;
+	mutex_unlock(&ld->ops_lock);
+
+	return rc;
+}
+
+static ssize_t lcd_store_power(struct class_device *cdev, const char *buf, size_t count)
+{
+	int rc = -ENXIO;
+	char *endp;
+	struct lcd_device *ld = to_lcd_device(cdev);
+	int power = simple_strtoul(buf, &endp, 0);
+	size_t size = endp - buf;
+
+	if (*endp && isspace(*endp))
+		size++;
+	if (size != count)
+		return -EINVAL;
+
+	mutex_lock(&ld->ops_lock);
+	if (ld->ops && ld->ops->set_power) {
+		pr_debug("lcd: set power to %d\n", power);
+		ld->ops->set_power(ld, power);
+		rc = count;
+	}
+	mutex_unlock(&ld->ops_lock);
+
+	return rc;
+}
+
+static ssize_t lcd_show_contrast(struct class_device *cdev, char *buf)
+{
+	int rc = -ENXIO;
+	struct lcd_device *ld = to_lcd_device(cdev);
+
+	mutex_lock(&ld->ops_lock);
+	if (ld->ops && ld->ops->get_contrast)
+		rc = sprintf(buf, "%d\n", ld->ops->get_contrast(ld));
+	mutex_unlock(&ld->ops_lock);
+
+	return rc;
+}
+
+static ssize_t lcd_store_contrast(struct class_device *cdev, const char *buf, size_t count)
+{
+	int rc = -ENXIO;
+	char *endp;
+	struct lcd_device *ld = to_lcd_device(cdev);
+	int contrast = simple_strtoul(buf, &endp, 0);
+	size_t size = endp - buf;
+
+	if (*endp && isspace(*endp))
+		size++;
+	if (size != count)
+		return -EINVAL;
+
+	mutex_lock(&ld->ops_lock);
+	if (ld->ops && ld->ops->set_contrast) {
+		pr_debug("lcd: set contrast to %d\n", contrast);
+		ld->ops->set_contrast(ld, contrast);
+		rc = count;
+	}
+	mutex_unlock(&ld->ops_lock);
+
+	return rc;
+}
+
+static ssize_t lcd_show_max_contrast(struct class_device *cdev, char *buf)
+{
+	struct lcd_device *ld = to_lcd_device(cdev);
+
+	return sprintf(buf, "%d\n", ld->props.max_contrast);
+}
+
+static void lcd_class_release(struct class_device *dev)
+{
+	struct lcd_device *ld = to_lcd_device(dev);
+	kfree(ld);
+}
+
+static struct class lcd_class = {
+	.name = "lcd",
+	.release = lcd_class_release,
+};
+
+#define DECLARE_ATTR(_name,_mode,_show,_store)			\
+{							 	\
+	.attr	= { .name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE },	\
+	.show	= _show,					\
+	.store	= _store,					\
+}
+
+static const struct class_device_attribute lcd_class_device_attributes[] = {
+	DECLARE_ATTR(power, 0644, lcd_show_power, lcd_store_power),
+	DECLARE_ATTR(contrast, 0644, lcd_show_contrast, lcd_store_contrast),
+	DECLARE_ATTR(max_contrast, 0444, lcd_show_max_contrast, NULL),
+};
+
+/**
+ * lcd_device_register - register a new object of lcd_device class.
+ * @name: the name of the new object(must be the same as the name of the
+ *   respective framebuffer device).
+ * @devdata: an optional pointer to be stored in the class_device. The
+ *   methods may retrieve it by using class_get_devdata(ld->class_dev).
+ * @ops: the lcd operations structure.
+ *
+ * Creates and registers a new lcd class_device. Returns either an ERR_PTR()
+ * or a pointer to the newly allocated device.
+ */
+struct lcd_device *lcd_device_register(const char *name, void *devdata,
+				       struct lcd_ops *ops)
+{
+	int i, rc;
+	struct lcd_device *new_ld;
+
+	pr_debug("lcd_device_register: name=%s\n", name);
+
+	new_ld = kzalloc(sizeof(struct lcd_device), GFP_KERNEL);
+	if (!new_ld)
+		return ERR_PTR(-ENOMEM);
+
+	mutex_init(&new_ld->ops_lock);
+	mutex_init(&new_ld->update_lock);
+	new_ld->ops = ops;
+	new_ld->class_dev.class = &lcd_class;
+	strlcpy(new_ld->class_dev.class_id, name, KOBJ_NAME_LEN);
+	class_set_devdata(&new_ld->class_dev, devdata);
+
+	rc = class_device_register(&new_ld->class_dev);
+	if (rc) {
+		kfree(new_ld);
+		return ERR_PTR(rc);
+	}
+
+	rc = lcd_register_fb(new_ld);
+	if (rc) {
+		class_device_unregister(&new_ld->class_dev);
+		return ERR_PTR(rc);
+	}
+
+	for (i = 0; i < ARRAY_SIZE(lcd_class_device_attributes); i++) {
+		rc = class_device_create_file(&new_ld->class_dev,
+					      &lcd_class_device_attributes[i]);
+		if (rc) {
+			while (--i >= 0)
+				class_device_remove_file(&new_ld->class_dev,
+							 &lcd_class_device_attributes[i]);
+			class_device_unregister(&new_ld->class_dev);
+			/* No need to kfree(new_ld) since release() method was called */
+			return ERR_PTR(rc);
+		}
+	}
+
+	return new_ld;
+}
+EXPORT_SYMBOL(lcd_device_register);
+
+/**
+ * lcd_device_unregister - unregisters a object of lcd_device class.
+ * @ld: the lcd device object to be unregistered and freed.
+ *
+ * Unregisters a previously registered via lcd_device_register object.
+ */
+void lcd_device_unregister(struct lcd_device *ld)
+{
+	int i;
+
+	if (!ld)
+		return;
+
+	pr_debug("lcd_device_unregister: name=%s\n", ld->class_dev.class_id);
+
+	for (i = 0; i < ARRAY_SIZE(lcd_class_device_attributes); i++)
+		class_device_remove_file(&ld->class_dev,
+					 &lcd_class_device_attributes[i]);
+
+	mutex_lock(&ld->ops_lock);
+	ld->ops = NULL;
+	mutex_unlock(&ld->ops_lock);
+	lcd_unregister_fb(ld);
+	class_device_unregister(&ld->class_dev);
+}
+EXPORT_SYMBOL(lcd_device_unregister);
+
+static void __exit lcd_class_exit(void)
+{
+	class_unregister(&lcd_class);
+}
+
+static int __init lcd_class_init(void)
+{
+	return class_register(&lcd_class);
+}
+
+/*
+ * if this is compiled into the kernel, we need to ensure that the
+ * class is registered before users of the class try to register lcd's
+ */
+postcore_initcall(lcd_class_init);
+module_exit(lcd_class_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jamey Hicks <jamey.hicks@hp.com>, Andrew Zabolotny <zap@homelink.ru>");
+MODULE_DESCRIPTION("LCD Lowlevel Control Abstraction");

drivers/video/backlight/locomolcd.c

@@ -0,0 +1,247 @@
+/*
+ * Backlight control code for Sharp Zaurus SL-5500
+ *
+ * Copyright 2005 John Lenz <lenz@cs.wisc.edu>
+ * Maintainer: Pavel Machek <pavel@suse.cz> (unless John wants to :-)
+ * GPL v2
+ *
+ * This driver assumes single CPU. That's okay, because collie is
+ * slightly old hardware, and noone is going to retrofit second CPU to
+ * old PDA.
+ */
+
+/* LCD power functions */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/fb.h>
+#include <linux/backlight.h>
+
+#include <asm/hardware/locomo.h>
+#include <asm/irq.h>
+#include <asm/mach/sharpsl_param.h>
+#include <asm/mach-types.h>
+
+#include "../../../arch/arm/mach-sa1100/generic.h"
+
+static struct backlight_device *locomolcd_bl_device;
+static struct locomo_dev *locomolcd_dev;
+static unsigned long locomolcd_flags;
+#define LOCOMOLCD_SUSPENDED     0x01
+
+static void locomolcd_on(int comadj)
+{
+	locomo_gpio_set_dir(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHA_ON, 0);
+	locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHA_ON, 1);
+	mdelay(2);
+
+	locomo_gpio_set_dir(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHD_ON, 0);
+	locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHD_ON, 1);
+	mdelay(2);
+
+	locomo_m62332_senddata(locomolcd_dev, comadj, 0);
+	mdelay(5);
+
+	locomo_gpio_set_dir(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VEE_ON, 0);
+	locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VEE_ON, 1);
+	mdelay(10);
+
+	/* TFTCRST | CPSOUT=0 | CPSEN */
+	locomo_writel(0x01, locomolcd_dev->mapbase + LOCOMO_TC);
+
+	/* Set CPSD */
+	locomo_writel(6, locomolcd_dev->mapbase + LOCOMO_CPSD);
+
+	/* TFTCRST | CPSOUT=0 | CPSEN */
+	locomo_writel((0x04 | 0x01), locomolcd_dev->mapbase + LOCOMO_TC);
+	mdelay(10);
+
+	locomo_gpio_set_dir(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_MOD, 0);
+	locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_MOD, 1);
+}
+
+static void locomolcd_off(int comadj)
+{
+	/* TFTCRST=1 | CPSOUT=1 | CPSEN = 0 */
+	locomo_writel(0x06, locomolcd_dev->mapbase + LOCOMO_TC);
+	mdelay(1);
+
+	locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHA_ON, 0);
+	mdelay(110);
+
+	locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VEE_ON, 0);
+	mdelay(700);
+
+	/* TFTCRST=0 | CPSOUT=0 | CPSEN = 0 */
+	locomo_writel(0, locomolcd_dev->mapbase + LOCOMO_TC);
+	locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_MOD, 0);
+	locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHD_ON, 0);
+}
+
+void locomolcd_power(int on)
+{
+	int comadj = sharpsl_param.comadj;
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	if (!locomolcd_dev) {
+		local_irq_restore(flags);
+		return;
+	}
+
+	/* read comadj */
+	if (comadj == -1 && machine_is_collie())
+		comadj = 128;
+	if (comadj == -1 && machine_is_poodle())
+		comadj = 118;
+
+	if (on)
+		locomolcd_on(comadj);
+	else
+		locomolcd_off(comadj);
+
+	local_irq_restore(flags);
+}
+EXPORT_SYMBOL(locomolcd_power);
+
+
+static int current_intensity;
+
+static int locomolcd_set_intensity(struct backlight_device *bd)
+{
+	int intensity = bd->props.brightness;
+
+	if (bd->props.power != FB_BLANK_UNBLANK)
+		intensity = 0;
+	if (bd->props.fb_blank != FB_BLANK_UNBLANK)
+		intensity = 0;
+	if (locomolcd_flags & LOCOMOLCD_SUSPENDED)
+		intensity = 0;
+
+	switch (intensity) {
+	/* AC and non-AC are handled differently, but produce same results in sharp code? */
+	case 0: locomo_frontlight_set(locomolcd_dev, 0, 0, 161); break;
+	case 1: locomo_frontlight_set(locomolcd_dev, 117, 0, 161); break;
+	case 2: locomo_frontlight_set(locomolcd_dev, 163, 0, 148); break;
+	case 3: locomo_frontlight_set(locomolcd_dev, 194, 0, 161); break;
+	case 4: locomo_frontlight_set(locomolcd_dev, 194, 1, 161); break;
+
+	default:
+		return -ENODEV;
+	}
+	current_intensity = intensity;
+	return 0;
+}
+
+static int locomolcd_get_intensity(struct backlight_device *bd)
+{
+	return current_intensity;
+}
+
+static struct backlight_ops locomobl_data = {
+	.get_brightness = locomolcd_get_intensity,
+	.update_status  = locomolcd_set_intensity,
+};
+
+#ifdef CONFIG_PM
+static int locomolcd_suspend(struct locomo_dev *dev, pm_message_t state)
+{
+	locomolcd_flags |= LOCOMOLCD_SUSPENDED;
+	locomolcd_set_intensity(locomolcd_bl_device);
+	return 0;
+}
+
+static int locomolcd_resume(struct locomo_dev *dev)
+{
+	locomolcd_flags &= ~LOCOMOLCD_SUSPENDED;
+	locomolcd_set_intensity(locomolcd_bl_device);
+	return 0;
+}
+#else
+#define locomolcd_suspend	NULL
+#define locomolcd_resume	NULL
+#endif
+
+static int locomolcd_probe(struct locomo_dev *ldev)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	locomolcd_dev = ldev;
+
+	locomo_gpio_set_dir(ldev->dev.parent, LOCOMO_GPIO_FL_VR, 0);
+
+	/* the poodle_lcd_power function is called for the first time
+	 * from fs_initcall, which is before locomo is activated.
+	 * We need to recall poodle_lcd_power here*/
+	if (machine_is_poodle())
+		locomolcd_power(1);
+
+	local_irq_restore(flags);
+
+	locomolcd_bl_device = backlight_device_register("locomo-bl", &ldev->dev, NULL, &locomobl_data);
+
+	if (IS_ERR (locomolcd_bl_device))
+		return PTR_ERR (locomolcd_bl_device);
+
+	/* Set up frontlight so that screen is readable */
+	locomolcd_bl_device->props.max_brightness = 4,
+	locomolcd_bl_device->props.brightness = 2;
+	locomolcd_set_intensity(locomolcd_bl_device);
+
+	return 0;
+}
+
+static int locomolcd_remove(struct locomo_dev *dev)
+{
+	unsigned long flags;
+
+	locomolcd_bl_device->props.brightness = 0;
+	locomolcd_bl_device->props.power = 0;
+	locomolcd_set_intensity(locomolcd_bl_device);
+
+	backlight_device_unregister(locomolcd_bl_device);
+	local_irq_save(flags);
+	locomolcd_dev = NULL;
+	local_irq_restore(flags);
+	return 0;
+}
+
+static struct locomo_driver poodle_lcd_driver = {
+	.drv = {
+		.name = "locomo-backlight",
+	},
+	.devid	= LOCOMO_DEVID_BACKLIGHT,
+	.probe	= locomolcd_probe,
+	.remove	= locomolcd_remove,
+	.suspend = locomolcd_suspend,
+	.resume = locomolcd_resume,
+};
+
+
+static int __init locomolcd_init(void)
+{
+	int ret = locomo_driver_register(&poodle_lcd_driver);
+	if (ret)
+		return ret;
+
+#ifdef CONFIG_SA1100_COLLIE
+	sa1100fb_lcd_power = locomolcd_power;
+#endif
+	return 0;
+}
+
+static void __exit locomolcd_exit(void)
+{
+	locomo_driver_unregister(&poodle_lcd_driver);
+}
+
+module_init(locomolcd_init);
+module_exit(locomolcd_exit);
+
+MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>, Pavel Machek <pavel@suse.cz>");
+MODULE_DESCRIPTION("Collie LCD driver");
+MODULE_LICENSE("GPL");

drivers/video/backlight/progear_bl.c

@@ -0,0 +1,153 @@
+/*
+ *  Backlight Driver for Frontpath ProGear HX1050+
+ *
+ *  Copyright (c) 2006 Marcin Juszkiewicz
+ *
+ *  Based on Progear LCD driver by M Schacht
+ *  <mschacht at alumni dot washington dot edu>
+ *
+ *  Based on Sharp's Corgi Backlight Driver
+ *  Based on Backlight Driver for HP Jornada 680
+ *
+ *  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/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/mutex.h>
+#include <linux/fb.h>
+#include <linux/backlight.h>
+#include <linux/pci.h>
+#include <asm/uaccess.h>
+
+#define PMU_LPCR               0xB0
+#define SB_MPS1                0x61
+#define HW_LEVEL_MAX           0x77
+#define HW_LEVEL_MIN           0x4f
+
+static struct pci_dev *pmu_dev = NULL;
+static struct pci_dev *sb_dev = NULL;
+
+static int progearbl_set_intensity(struct backlight_device *bd)
+{
+	int intensity = bd->props.brightness;
+
+	if (bd->props.power != FB_BLANK_UNBLANK)
+		intensity = 0;
+	if (bd->props.fb_blank != FB_BLANK_UNBLANK)
+		intensity = 0;
+
+	pci_write_config_byte(pmu_dev, PMU_LPCR, intensity + HW_LEVEL_MIN);
+
+	return 0;
+}
+
+static int progearbl_get_intensity(struct backlight_device *bd)
+{
+	u8 intensity;
+	pci_read_config_byte(pmu_dev, PMU_LPCR, &intensity);
+
+	return intensity - HW_LEVEL_MIN;
+}
+
+static struct backlight_ops progearbl_ops = {
+	.get_brightness = progearbl_get_intensity,
+	.update_status = progearbl_set_intensity,
+};
+
+static int progearbl_probe(struct platform_device *pdev)
+{
+	u8 temp;
+	struct backlight_device *progear_backlight_device;
+
+	pmu_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101, NULL);
+	if (!pmu_dev) {
+		printk("ALI M7101 PMU not found.\n");
+		return -ENODEV;
+	}
+
+	sb_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
+	if (!sb_dev) {
+		printk("ALI 1533 SB not found.\n");
+		pci_dev_put(pmu_dev);
+		return -ENODEV;
+	}
+
+	/*     Set SB_MPS1 to enable brightness control. */
+	pci_read_config_byte(sb_dev, SB_MPS1, &temp);
+	pci_write_config_byte(sb_dev, SB_MPS1, temp | 0x20);
+
+	progear_backlight_device = backlight_device_register("progear-bl",
+							     &pdev->dev, NULL,
+							     &progearbl_ops);
+	if (IS_ERR(progear_backlight_device))
+		return PTR_ERR(progear_backlight_device);
+
+	platform_set_drvdata(pdev, progear_backlight_device);
+
+	progear_backlight_device->props.power = FB_BLANK_UNBLANK;
+	progear_backlight_device->props.brightness = HW_LEVEL_MAX - HW_LEVEL_MIN;
+	progear_backlight_device->props.max_brightness = HW_LEVEL_MAX - HW_LEVEL_MIN;
+	progearbl_set_intensity(progear_backlight_device);
+
+	return 0;
+}
+
+static int progearbl_remove(struct platform_device *pdev)
+{
+	struct backlight_device *bd = platform_get_drvdata(pdev);
+	backlight_device_unregister(bd);
+
+	return 0;
+}
+
+static struct platform_driver progearbl_driver = {
+	.probe = progearbl_probe,
+	.remove = progearbl_remove,
+	.driver = {
+		   .name = "progear-bl",
+		   },
+};
+
+static struct platform_device *progearbl_device;
+
+static int __init progearbl_init(void)
+{
+	int ret = platform_driver_register(&progearbl_driver);
+
+	if (!ret) {
+		progearbl_device = platform_device_alloc("progear-bl", -1);
+		if (!progearbl_device)
+			return -ENOMEM;
+
+		ret = platform_device_add(progearbl_device);
+
+		if (ret) {
+			platform_device_put(progearbl_device);
+			platform_driver_unregister(&progearbl_driver);
+		}
+	}
+
+	return ret;
+}
+
+static void __exit progearbl_exit(void)
+{
+	pci_dev_put(pmu_dev);
+	pci_dev_put(sb_dev);
+
+	platform_device_unregister(progearbl_device);
+	platform_driver_unregister(&progearbl_driver);
+}
+
+module_init(progearbl_init);
+module_exit(progearbl_exit);
+
+MODULE_AUTHOR("Marcin Juszkiewicz <linux@hrw.one.pl>");
+MODULE_DESCRIPTION("ProGear Backlight Driver");
+MODULE_LICENSE("GPL");