+++ /dev/null
-/*
- * 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");
projects / openwrt / svn-archive / archive.git / blobdiff