diff options
Diffstat (limited to 'drivers/video/backlight/corgi_bl.c')
| -rw-r--r-- | drivers/video/backlight/corgi_bl.c | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/drivers/video/backlight/corgi_bl.c b/drivers/video/backlight/corgi_bl.c deleted file mode 100644 index 353cb3f73cf..00000000000 --- a/drivers/video/backlight/corgi_bl.c +++ /dev/null @@ -1,198 +0,0 @@ -/* - * Backlight Driver for Sharp Corgi - * - * Copyright (c) 2004-2005 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/device.h> -#include <linux/spinlock.h> -#include <linux/fb.h> -#include <linux/backlight.h> - -#include <asm/arch-pxa/corgi.h> -#include <asm/hardware/scoop.h> - -#define CORGI_MAX_INTENSITY 0x3e -#define CORGI_DEFAULT_INTENSITY 0x1f -#define CORGI_LIMIT_MASK 0x0b - -static int corgibl_powermode = FB_BLANK_UNBLANK; -static int current_intensity = 0; -static int corgibl_limit = 0; -static spinlock_t bl_lock = SPIN_LOCK_UNLOCKED; - -static void corgibl_send_intensity(int intensity) -{ - unsigned long flags; - void (*corgi_kick_batt)(void); - - if (corgibl_powermode != FB_BLANK_UNBLANK) { - intensity = 0; - } else { - if (corgibl_limit) - intensity &= CORGI_LIMIT_MASK; - } - - /* Skip 0x20 as it will blank the display */ - if (intensity >= 0x20) - intensity++; - - spin_lock_irqsave(&bl_lock, flags); - /* Bits 0-4 are accessed via the SSP interface */ - corgi_ssp_blduty_set(intensity & 0x1f); - /* Bit 5 is via SCOOP */ - if (intensity & 0x0020) - set_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_BACKLIGHT_CONT); - else - reset_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_BACKLIGHT_CONT); - spin_unlock_irqrestore(&bl_lock, flags); -} - -static void corgibl_blank(int blank) -{ - switch(blank) { - - case FB_BLANK_NORMAL: - case FB_BLANK_VSYNC_SUSPEND: - case FB_BLANK_HSYNC_SUSPEND: - case FB_BLANK_POWERDOWN: - if (corgibl_powermode == FB_BLANK_UNBLANK) { - corgibl_send_intensity(0); - corgibl_powermode = blank; - } - break; - case FB_BLANK_UNBLANK: - if (corgibl_powermode != FB_BLANK_UNBLANK) { - corgibl_powermode = blank; - corgibl_send_intensity(current_intensity); - } - break; - } -} - -#ifdef CONFIG_PM -static int corgibl_suspend(struct device *dev, pm_message_t state, u32 level) -{ - if (level == SUSPEND_POWER_DOWN) - corgibl_blank(FB_BLANK_POWERDOWN); - return 0; -} - -static int corgibl_resume(struct device *dev, u32 level) -{ - if (level == RESUME_POWER_ON) - corgibl_blank(FB_BLANK_UNBLANK); - return 0; -} -#else -#define corgibl_suspend NULL -#define corgibl_resume NULL -#endif - - -static int corgibl_set_power(struct backlight_device *bd, int state) -{ - corgibl_blank(state); - return 0; -} - -static int corgibl_get_power(struct backlight_device *bd) -{ - return corgibl_powermode; -} - -static int corgibl_set_intensity(struct backlight_device *bd, int intensity) -{ - if (intensity > CORGI_MAX_INTENSITY) - intensity = CORGI_MAX_INTENSITY; - corgibl_send_intensity(intensity); - current_intensity=intensity; - return 0; -} - -static int corgibl_get_intensity(struct backlight_device *bd) -{ - return current_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) -{ - corgibl_limit = (limit ? 1 : 0); - corgibl_send_intensity(current_intensity); -} -EXPORT_SYMBOL(corgibl_limit_intensity); - - -static struct backlight_properties corgibl_data = { - .owner = THIS_MODULE, - .get_power = corgibl_get_power, - .set_power = corgibl_set_power, - .max_brightness = CORGI_MAX_INTENSITY, - .get_brightness = corgibl_get_intensity, - .set_brightness = corgibl_set_intensity, -}; - -static struct backlight_device *corgi_backlight_device; - -static int __init corgibl_probe(struct device *dev) -{ - corgi_backlight_device = backlight_device_register ("corgi-bl", - NULL, &corgibl_data); - if (IS_ERR (corgi_backlight_device)) - return PTR_ERR (corgi_backlight_device); - - corgibl_set_intensity(NULL, CORGI_DEFAULT_INTENSITY); - - printk("Corgi Backlight Driver Initialized.\n"); - return 0; -} - -static int corgibl_remove(struct device *dev) -{ - backlight_device_unregister(corgi_backlight_device); - - corgibl_set_intensity(NULL, 0); - - printk("Corgi Backlight Driver Unloaded\n"); - return 0; -} - -static struct device_driver corgibl_driver = { - .name = "corgi-bl", - .bus = &platform_bus_type, - .probe = corgibl_probe, - .remove = corgibl_remove, - .suspend = corgibl_suspend, - .resume = corgibl_resume, -}; - -static int __init corgibl_init(void) -{ - return driver_register(&corgibl_driver); -} - -static void __exit corgibl_exit(void) -{ - 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("GPLv2"); |