diff options
Diffstat (limited to 'drivers/video/backlight/corgi_bl.c')
| -rw-r--r-- | drivers/video/backlight/corgi_bl.c | 124 |
1 files changed, 46 insertions, 78 deletions
diff --git a/drivers/video/backlight/corgi_bl.c b/drivers/video/backlight/corgi_bl.c index d0aaf450e8c7..2ebbfd95145f 100644 --- a/drivers/video/backlight/corgi_bl.c +++ b/drivers/video/backlight/corgi_bl.c @@ -1,7 +1,7 @@ /* - * Backlight Driver for Sharp Corgi + * Backlight Driver for Sharp Zaurus Handhelds (various models) * - * Copyright (c) 2004-2005 Richard Purdie + * Copyright (c) 2004-2006 Richard Purdie * * Based on Sharp's 2.4 Backlight Driver * @@ -15,80 +15,63 @@ #include <linux/kernel.h> #include <linux/init.h> #include <linux/platform_device.h> -#include <linux/spinlock.h> +#include <linux/mutex.h> #include <linux/fb.h> #include <linux/backlight.h> - #include <asm/arch/sharpsl.h> #include <asm/hardware/sharpsl_pm.h> -#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 void (*corgibl_mach_set_intensity)(int intensity); -static spinlock_t bl_lock = SPIN_LOCK_UNLOCKED; +static int corgibl_intensity; +static DEFINE_MUTEX(bl_mutex); static struct backlight_properties corgibl_data; +static struct backlight_device *corgi_backlight_device; +static struct corgibl_machinfo *bl_machinfo; -static void corgibl_send_intensity(int intensity) +static unsigned long corgibl_flags; +#define CORGIBL_SUSPENDED 0x01 +#define CORGIBL_BATTLOW 0x02 + +static int corgibl_send_intensity(struct backlight_device *bd) { - unsigned long flags; void (*corgi_kick_batt)(void); + int intensity = bd->props->brightness; - if (corgibl_powermode != FB_BLANK_UNBLANK) { + if (bd->props->power != FB_BLANK_UNBLANK) intensity = 0; - } else { - if (corgibl_limit) - intensity &= CORGI_LIMIT_MASK; - } - - spin_lock_irqsave(&bl_lock, flags); + 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; - corgibl_mach_set_intensity(intensity); + mutex_lock(&bl_mutex); + bl_machinfo->set_bl_intensity(intensity); + mutex_unlock(&bl_mutex); - spin_unlock_irqrestore(&bl_lock, flags); + corgibl_intensity = intensity; corgi_kick_batt = symbol_get(sharpsl_battery_kick); if (corgi_kick_batt) { corgi_kick_batt(); symbol_put(sharpsl_battery_kick); } -} -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; - } + return 0; } #ifdef CONFIG_PM static int corgibl_suspend(struct platform_device *dev, pm_message_t state) { - corgibl_blank(FB_BLANK_POWERDOWN); + corgibl_flags |= CORGIBL_SUSPENDED; + corgibl_send_intensity(corgi_backlight_device); return 0; } static int corgibl_resume(struct platform_device *dev) { - corgibl_blank(FB_BLANK_UNBLANK); + corgibl_flags &= ~CORGIBL_SUSPENDED; + corgibl_send_intensity(corgi_backlight_device); return 0; } #else @@ -96,68 +79,55 @@ static int corgibl_resume(struct platform_device *dev) #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) +static int corgibl_get_intensity(struct backlight_device *bd) { - return corgibl_powermode; + return corgibl_intensity; } -static int corgibl_set_intensity(struct backlight_device *bd, int intensity) +static int corgibl_set_intensity(struct backlight_device *bd) { - if (intensity > corgibl_data.max_brightness) - intensity = corgibl_data.max_brightness; - corgibl_send_intensity(intensity); - current_intensity=intensity; + corgibl_send_intensity(corgi_backlight_device); 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); + if (limit) + corgibl_flags |= CORGIBL_BATTLOW; + else + corgibl_flags &= ~CORGIBL_BATTLOW; + corgibl_send_intensity(corgi_backlight_device); } EXPORT_SYMBOL(corgibl_limit_intensity); static struct backlight_properties corgibl_data = { - .owner = THIS_MODULE, - .get_power = corgibl_get_power, - .set_power = corgibl_set_power, + .owner = THIS_MODULE, .get_brightness = corgibl_get_intensity, - .set_brightness = corgibl_set_intensity, + .update_status = corgibl_set_intensity, }; -static struct backlight_device *corgi_backlight_device; - static int __init corgibl_probe(struct platform_device *pdev) { struct corgibl_machinfo *machinfo = pdev->dev.platform_data; + bl_machinfo = machinfo; corgibl_data.max_brightness = machinfo->max_intensity; - corgibl_mach_set_intensity = machinfo->set_bl_intensity; + if (!machinfo->limit_mask) + machinfo->limit_mask = -1; 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); - corgibl_limit_intensity(0); + corgibl_data.power = FB_BLANK_UNBLANK; + corgibl_data.brightness = machinfo->default_intensity; + corgibl_send_intensity(corgi_backlight_device); printk("Corgi Backlight Driver Initialized.\n"); return 0; @@ -167,8 +137,6 @@ static int corgibl_remove(struct platform_device *dev) { backlight_device_unregister(corgi_backlight_device); - corgibl_set_intensity(NULL, 0); - printk("Corgi Backlight Driver Unloaded\n"); return 0; } |