diff options
Diffstat (limited to 'arch/ppc/platforms/pmac_backlight.c')
| -rw-r--r-- | arch/ppc/platforms/pmac_backlight.c | 202 |
1 files changed, 0 insertions, 202 deletions
diff --git a/arch/ppc/platforms/pmac_backlight.c b/arch/ppc/platforms/pmac_backlight.c deleted file mode 100644 index 8be2f7d071f..00000000000 --- a/arch/ppc/platforms/pmac_backlight.c +++ /dev/null @@ -1,202 +0,0 @@ -/* - * Miscellaneous procedures for dealing with the PowerMac hardware. - * Contains support for the backlight. - * - * Copyright (C) 2000 Benjamin Herrenschmidt - * - */ - -#include <linux/config.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/stddef.h> -#include <linux/reboot.h> -#include <linux/nvram.h> -#include <linux/console.h> -#include <asm/sections.h> -#include <asm/ptrace.h> -#include <asm/io.h> -#include <asm/pgtable.h> -#include <asm/system.h> -#include <asm/prom.h> -#include <asm/machdep.h> -#include <asm/nvram.h> -#include <asm/backlight.h> - -#include <linux/adb.h> -#include <linux/pmu.h> - -static struct backlight_controller *backlighter; -static void* backlighter_data; -static int backlight_autosave; -static int backlight_level = BACKLIGHT_MAX; -static int backlight_enabled = 1; -static int backlight_req_level = -1; -static int backlight_req_enable = -1; - -static void backlight_callback(void *); -static DECLARE_WORK(backlight_work, backlight_callback, NULL); - -void register_backlight_controller(struct backlight_controller *ctrler, - void *data, char *type) -{ - struct device_node* bk_node; - char *prop; - int valid = 0; - - /* There's already a matching controller, bail out */ - if (backlighter != NULL) - return; - - bk_node = find_devices("backlight"); - -#ifdef CONFIG_ADB_PMU - /* Special case for the old PowerBook since I can't test on it */ - backlight_autosave = machine_is_compatible("AAPL,3400/2400") - || machine_is_compatible("AAPL,3500"); - if ((backlight_autosave - || machine_is_compatible("AAPL,PowerBook1998") - || machine_is_compatible("PowerBook1,1")) - && !strcmp(type, "pmu")) - valid = 1; -#endif - if (bk_node) { - prop = get_property(bk_node, "backlight-control", NULL); - if (prop && !strncmp(prop, type, strlen(type))) - valid = 1; - } - if (!valid) - return; - backlighter = ctrler; - backlighter_data = data; - - if (bk_node && !backlight_autosave) - prop = get_property(bk_node, "bklt", NULL); - else - prop = NULL; - if (prop) { - backlight_level = ((*prop)+1) >> 1; - if (backlight_level > BACKLIGHT_MAX) - backlight_level = BACKLIGHT_MAX; - } - -#ifdef CONFIG_ADB_PMU - if (backlight_autosave) { - struct adb_request req; - pmu_request(&req, NULL, 2, 0xd9, 0); - while (!req.complete) - pmu_poll(); - backlight_level = req.reply[0] >> 4; - } -#endif - acquire_console_sem(); - if (!backlighter->set_enable(1, backlight_level, data)) - backlight_enabled = 1; - release_console_sem(); - - printk(KERN_INFO "Registered \"%s\" backlight controller," - "level: %d/15\n", type, backlight_level); -} -EXPORT_SYMBOL(register_backlight_controller); - -void unregister_backlight_controller(struct backlight_controller - *ctrler, void *data) -{ - /* We keep the current backlight level (for now) */ - if (ctrler == backlighter && data == backlighter_data) - backlighter = NULL; -} -EXPORT_SYMBOL(unregister_backlight_controller); - -static int __set_backlight_enable(int enable) -{ - int rc; - - if (!backlighter) - return -ENODEV; - acquire_console_sem(); - rc = backlighter->set_enable(enable, backlight_level, - backlighter_data); - if (!rc) - backlight_enabled = enable; - release_console_sem(); - return rc; -} -int set_backlight_enable(int enable) -{ - if (!backlighter) - return -ENODEV; - backlight_req_enable = enable; - schedule_work(&backlight_work); - return 0; -} - -EXPORT_SYMBOL(set_backlight_enable); - -int get_backlight_enable(void) -{ - if (!backlighter) - return -ENODEV; - return backlight_enabled; -} -EXPORT_SYMBOL(get_backlight_enable); - -static int __set_backlight_level(int level) -{ - int rc = 0; - - if (!backlighter) - return -ENODEV; - if (level < BACKLIGHT_MIN) - level = BACKLIGHT_OFF; - if (level > BACKLIGHT_MAX) - level = BACKLIGHT_MAX; - acquire_console_sem(); - if (backlight_enabled) - rc = backlighter->set_level(level, backlighter_data); - if (!rc) - backlight_level = level; - release_console_sem(); - if (!rc && !backlight_autosave) { - level <<=1; - if (level & 0x10) - level |= 0x01; - // -- todo: save to property "bklt" - } - return rc; -} -int set_backlight_level(int level) -{ - if (!backlighter) - return -ENODEV; - backlight_req_level = level; - schedule_work(&backlight_work); - return 0; -} - -EXPORT_SYMBOL(set_backlight_level); - -int get_backlight_level(void) -{ - if (!backlighter) - return -ENODEV; - return backlight_level; -} -EXPORT_SYMBOL(get_backlight_level); - -static void backlight_callback(void *dummy) -{ - int level, enable; - - do { - level = backlight_req_level; - enable = backlight_req_enable; - mb(); - - if (level >= 0) - __set_backlight_level(level); - if (enable >= 0) - __set_backlight_enable(enable); - } while(cmpxchg(&backlight_req_level, level, -1) != level || - cmpxchg(&backlight_req_enable, enable, -1) != enable); -} |