diff options
Diffstat (limited to 'target/linux/s3c24xx/files-2.6.30/arch/arm/mach-s3c2442/gta02-pm-wlan.c')
| -rw-r--r-- | target/linux/s3c24xx/files-2.6.30/arch/arm/mach-s3c2442/gta02-pm-wlan.c | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/target/linux/s3c24xx/files-2.6.30/arch/arm/mach-s3c2442/gta02-pm-wlan.c b/target/linux/s3c24xx/files-2.6.30/arch/arm/mach-s3c2442/gta02-pm-wlan.c deleted file mode 100644 index 9cb8e6a5e8..0000000000 --- a/target/linux/s3c24xx/files-2.6.30/arch/arm/mach-s3c2442/gta02-pm-wlan.c +++ /dev/null @@ -1,194 +0,0 @@ -/* - * GTA02 WLAN power management - * - * (C) 2008, 2009 by Openmoko Inc. - * Author: Andy Green <andy@openmoko.com> - * All rights reserved. - * - * 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/init.h> -#include <linux/kernel.h> -#include <linux/mutex.h> -#include <linux/platform_device.h> - -#include <mach/hardware.h> -#include <asm/mach-types.h> - -#include <mach/gta02.h> -#include <mach/gta02-pm-wlan.h> -#include <mach/regs-gpio.h> -#include <mach/regs-gpioj.h> - -#include <linux/delay.h> -#include <linux/rfkill.h> - - -/* ----- Module hardware reset ("power") ----------------------------------- */ - - -void gta02_wlan_reset(int assert_reset) -{ - if (assert_reset) { - s3c2410_gpio_setpin(GTA02_GPIO_nWLAN_RESET, 0); - msleep(200); /* probably excessive but we don't have specs */ - } else { - s3c2410_gpio_setpin(GTA02_GPIO_nWLAN_RESET, 1); - } -} - -/* ----- rfkill ------------------------------------------------------------ */ - -/* - * S3C MCI handles suspend/resume through device removal/insertion. In order to - * preserve rfkill state, as required in clause 7 of section 3.1 in rfkill.txt, - * we therefore need to maintain rfkill state outside the driver. - * - * This platform driver is as good a place as any other. - */ - -static int (*gta02_wlan_rfkill_cb)(void *user, int on); -static void *gta02_wlan_rfkill_user; -static DEFINE_MUTEX(gta02_wlan_rfkill_lock); -static int gta02_wlan_rfkill_on; - -/* - * gta02_wlan_query_rfkill_lock is used to obtain the rfkill state before the - * driver is ready to process rfkill callbacks. To prevent the state from - * changing until the driver has completed its initialization, we grab and hold - * the rfkill lock. - * - * A call to gta02_wlan_query_rfkill_lock must be followed by either - * - a call to gta02_wlan_set_rfkill_cb, to complete the setup, or - * - a call to gta02_wlan_query_rfkill_unlock to abort the setup process. - */ - -int gta02_wlan_query_rfkill_lock(void) -{ - mutex_lock(>a02_wlan_rfkill_lock); - return gta02_wlan_rfkill_on; -} -EXPORT_SYMBOL_GPL(gta02_wlan_query_rfkill_lock); - -void gta02_wlan_query_rfkill_unlock(void) -{ - mutex_unlock(>a02_wlan_rfkill_lock); -} -EXPORT_SYMBOL_GPL(gta02_wlan_query_rfkill_unlock); - -void gta02_wlan_set_rfkill_cb(int (*cb)(void *user, int on), void *user) -{ - BUG_ON(!mutex_is_locked(>a02_wlan_rfkill_lock)); - BUG_ON(gta02_wlan_rfkill_cb); - gta02_wlan_rfkill_cb = cb; - gta02_wlan_rfkill_user = user; - mutex_unlock(>a02_wlan_rfkill_lock); -} -EXPORT_SYMBOL_GPL(gta02_wlan_set_rfkill_cb); - -void gta02_wlan_clear_rfkill_cb(void) -{ - mutex_lock(>a02_wlan_rfkill_lock); - BUG_ON(!gta02_wlan_rfkill_cb); - gta02_wlan_rfkill_cb = NULL; - mutex_unlock(>a02_wlan_rfkill_lock); -} -EXPORT_SYMBOL_GPL(gta02_wlan_clear_rfkill_cb); - -static int gta02_wlan_toggle_radio(void *data, enum rfkill_state state) -{ - struct device *dev = data; - int on = state == RFKILL_STATE_UNBLOCKED; - int res = 0; - - dev_dbg(dev, "gta02_wlan_toggle_radio: state %d (%p)\n", - state, gta02_wlan_rfkill_cb); - mutex_lock(>a02_wlan_rfkill_lock); - if (gta02_wlan_rfkill_cb) - res = gta02_wlan_rfkill_cb(gta02_wlan_rfkill_user, on); - if (!res) - gta02_wlan_rfkill_on = on; - mutex_unlock(>a02_wlan_rfkill_lock); - return res; -} - - -/* ----- Initialization/removal -------------------------------------------- */ - - -static int __init gta02_wlan_probe(struct platform_device *pdev) -{ - /* default-on for now */ - const int default_state = 1; - struct rfkill *rfkill; - int error; - - dev_info(&pdev->dev, "starting\n"); - - s3c2410_gpio_cfgpin(GTA02_GPIO_nWLAN_RESET, S3C2410_GPIO_OUTPUT); - gta02_wlan_reset(1); - gta02_wlan_reset(0); - - rfkill = rfkill_allocate(&pdev->dev, RFKILL_TYPE_WLAN); - rfkill->name = "ar6000"; - rfkill->data = &pdev->dev; - rfkill->state = default_state ? RFKILL_STATE_ON : RFKILL_STATE_OFF; - /* - * If the WLAN driver somehow managed to get activated before we're - * ready, the driver is now in an unknown state, which isn't something - * we're prepared to handle. This can't happen, so just fail hard. - */ - BUG_ON(gta02_wlan_rfkill_cb); - gta02_wlan_rfkill_on = default_state; - rfkill->toggle_radio = gta02_wlan_toggle_radio; - - error = rfkill_register(rfkill); - if (error) { - rfkill_free(rfkill); - return error; - } - - dev_set_drvdata(&pdev->dev, rfkill); - - return 0; -} - -static int gta02_wlan_remove(struct platform_device *pdev) -{ - struct rfkill *rfkill = dev_get_drvdata(&pdev->dev); - - rfkill_unregister(rfkill); - rfkill_free(rfkill); - - return 0; -} - -static struct platform_driver gta02_wlan_driver = { - .probe = gta02_wlan_probe, - .remove = gta02_wlan_remove, - .driver = { - .name = "gta02-pm-wlan", - }, -}; - -static int __devinit gta02_wlan_init(void) -{ - return platform_driver_register(>a02_wlan_driver); -} - -static void gta02_wlan_exit(void) -{ - platform_driver_unregister(>a02_wlan_driver); -} - -module_init(gta02_wlan_init); -module_exit(gta02_wlan_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Andy Green <andy@openmoko.com>"); -MODULE_DESCRIPTION("Openmoko GTA02 WLAN power management"); |