ath9k: add support for registering extra leds connected to the wmac gpio lines

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@29530 3c298f89-4303-0410-b956-a3cf2f4a3e73

2 files changed, 326 insertions, 0 deletions

diff --git a/package/mac80211/patches/580-ath9k_extra_leds.patch b/package/mac80211/patches/580-ath9k_extra_leds.patch
new file mode 100644
index 0000000000..a079607241
--- /dev/null
+++ b/package/mac80211/patches/580-ath9k_extra_leds.patch
@@ -0,0 +1,258 @@
+--- a/drivers/net/wireless/ath/ath9k/ath9k.h
++++ b/drivers/net/wireless/ath/ath9k/ath9k.h
+@@ -474,6 +474,9 @@ void ath9k_btcoex_timer_pause(struct ath
+ #ifdef CONFIG_MAC80211_LEDS
+ void ath_init_leds(struct ath_softc *sc);
+ void ath_deinit_leds(struct ath_softc *sc);
++int ath_create_gpio_led(struct ath_softc *sc, int gpio, const char *name,
++                        const char *trigger, bool active_low);
++
+ #else
+ static inline void ath_init_leds(struct ath_softc *sc)
+ {
+@@ -594,6 +597,13 @@ struct ath9k_vif_iter_data {
+ 	int nothers;   /* number of vifs not specified above. */
+ };
+ 
++struct ath_led {
++	struct list_head list;
++	struct ath_softc *sc;
++	const struct gpio_led *gpio;
++	struct led_classdev cdev;
++};
++
+ struct ath_softc {
+ 	struct ieee80211_hw *hw;
+ 	struct device *dev;
+@@ -637,9 +647,8 @@ struct ath_softc {
+ 	struct ieee80211_supported_band sbands[IEEE80211_NUM_BANDS];
+ 
+ #ifdef CONFIG_MAC80211_LEDS
+-	bool led_registered;
+-	char led_name[32];
+-	struct led_classdev led_cdev;
++	const char *led_default_trigger;
++	struct list_head leds;
+ #endif
+ 
+ 	struct ath9k_hw_cal_data caldata;
+--- a/drivers/net/wireless/ath/ath9k/gpio.c
++++ b/drivers/net/wireless/ath/ath9k/gpio.c
+@@ -24,22 +24,89 @@
+ static void ath_led_brightness(struct led_classdev *led_cdev,
+ 			       enum led_brightness brightness)
+ {
+-	struct ath_softc *sc = container_of(led_cdev, struct ath_softc, led_cdev);
+-	ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, (brightness == LED_OFF));
++	struct ath_led *led = container_of(led_cdev, struct ath_led, cdev);
++	struct ath_softc *sc = led->sc;
++
++	ath9k_ps_wakeup(sc);
++	ath9k_hw_set_gpio(sc->sc_ah, led->gpio->gpio,
++			  (brightness != LED_OFF) ^ led->gpio->active_low);
++	ath9k_ps_restore(sc);
++}
++
++static int ath_add_led(struct ath_softc *sc, struct ath_led *led)
++{
++	const struct gpio_led *gpio = led->gpio;
++	int ret;
++
++	led->cdev.name = gpio->name;
++	led->cdev.default_trigger = gpio->default_trigger;
++	led->cdev.brightness_set = ath_led_brightness;
++
++	ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &led->cdev);
++	if (ret < 0)
++		return ret;
++
++	led->sc = sc;
++	list_add(&led->list, &sc->leds);
++
++	/* Configure gpio for output */
++	ath9k_hw_cfg_output(sc->sc_ah, gpio->gpio,
++			    AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
++
++	/* LED off */
++	ath9k_hw_set_gpio(sc->sc_ah, gpio->gpio, gpio->active_low);
++
++	return 0;
++}
++
++int ath_create_gpio_led(struct ath_softc *sc, int gpio_num, const char *name,
++			const char *trigger, bool active_low)
++{
++	struct ath_led *led;
++	struct gpio_led *gpio;
++	char *_name;
++	int ret;
++
++	led = kzalloc(sizeof(*led) + sizeof(*gpio) + strlen(name) + 1,
++		      GFP_KERNEL);
++	if (!led)
++		return -ENOMEM;
++
++	led->gpio = gpio = (struct gpio_led *) (led + 1);
++	_name = (char *) (led->gpio + 1);
++
++	strcpy(_name, name);
++	gpio->name = _name;
++	gpio->gpio = gpio_num;
++	gpio->active_low = active_low;
++	gpio->default_trigger = trigger;
++
++	ret = ath_add_led(sc, led);
++	if (unlikely(ret < 0))
++		kfree(led);
++
++	return ret;
+ }
+ 
+ void ath_deinit_leds(struct ath_softc *sc)
+ {
+-	if (!sc->led_registered)
+-		return;
++	struct ath_led *led;
+ 
+-	ath_led_brightness(&sc->led_cdev, LED_OFF);
+-	led_classdev_unregister(&sc->led_cdev);
++	while (!list_empty(&sc->leds)) {
++		led = list_first_entry(&sc->leds, struct ath_led, list);
++		list_del(&led->list);
++		ath_led_brightness(&led->cdev, LED_OFF);
++		led_classdev_unregister(&led->cdev);
++		kfree(led);
++	}
+ }
+ 
+ void ath_init_leds(struct ath_softc *sc)
+ {
+-	int ret;
++	char led_name[32];
++	const char *trigger;
++
++	INIT_LIST_HEAD(&sc->leds);
+ 
+ 	if (AR_SREV_9100(sc->sc_ah))
+ 		return;
+@@ -57,26 +124,15 @@ void ath_init_leds(struct ath_softc *sc)
+ 			sc->sc_ah->led_pin = ATH_LED_PIN_DEF;
+ 	}
+ 
+-	/* Configure gpio 1 for output */
+-	ath9k_hw_cfg_output(sc->sc_ah, sc->sc_ah->led_pin,
+-			    AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
+-	/* LED off, active low */
+-	ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1);
+-
+-	if (!led_blink)
+-		sc->led_cdev.default_trigger =
+-			ieee80211_get_radio_led_name(sc->hw);
+-
+-	snprintf(sc->led_name, sizeof(sc->led_name),
+-		"ath9k-%s", wiphy_name(sc->hw->wiphy));
+-	sc->led_cdev.name = sc->led_name;
+-	sc->led_cdev.brightness_set = ath_led_brightness;
++	snprintf(led_name, sizeof(led_name), "ath9k-%s",
++		 wiphy_name(sc->hw->wiphy));
+ 
+-	ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &sc->led_cdev);
+-	if (ret < 0)
+-		return;
++	if (led_blink)
++		trigger = sc->led_default_trigger;
++	else
++		trigger = ieee80211_get_radio_led_name(sc->hw);
+ 
+-	sc->led_registered = true;
++	ath_create_gpio_led(sc, sc->sc_ah->led_pin, led_name, trigger, 1);
+ }
+ #endif
+ 
+--- a/drivers/net/wireless/ath/ath9k/init.c
++++ b/drivers/net/wireless/ath/ath9k/init.c
+@@ -803,7 +803,7 @@ int ath9k_init_device(u16 devid, struct 
+ 
+ #ifdef CONFIG_MAC80211_LEDS
+ 	/* must be initialized before ieee80211_register_hw */
+-	sc->led_cdev.default_trigger = ieee80211_create_tpt_led_trigger(sc->hw,
++	sc->led_default_trigger = ieee80211_create_tpt_led_trigger(sc->hw,
+ 		IEEE80211_TPT_LEDTRIG_FL_RADIO, ath9k_tpt_blink,
+ 		ARRAY_SIZE(ath9k_tpt_blink));
+ #endif
+--- a/drivers/net/wireless/ath/ath9k/debug.c
++++ b/drivers/net/wireless/ath/ath9k/debug.c
+@@ -1304,6 +1304,61 @@ static const struct file_operations fops
+ 	.llseek = default_llseek,
+ };
+ 
++#ifdef CONFIG_MAC80211_LEDS
++
++static ssize_t write_file_gpio_led(struct file *file, const char __user *ubuf,
++				   size_t count, loff_t *ppos)
++{
++	struct ath_softc *sc = file->private_data;
++	char buf[32], *str, *name, *c;
++	ssize_t len;
++	unsigned int gpio;
++	bool active_low = false;
++
++	len = min(count, sizeof(buf) - 1);
++	if (copy_from_user(buf, ubuf, len))
++		return -EFAULT;
++
++	buf[len] = '\0';
++	name = strchr(buf, ',');
++	if (!name)
++		return -EINVAL;
++
++	*(name++) = 0;
++	if (!*name)
++		return -EINVAL;
++
++	c = strchr(name, '\n');
++	if (c)
++		*c = 0;
++
++	str = buf;
++	if (*str == '!') {
++		str++;
++		active_low = true;
++	}
++
++	if (kstrtouint(str, 0, &gpio) < 0)
++		return -EINVAL;
++
++	if (gpio >= sc->sc_ah->caps.num_gpio_pins)
++		return -EINVAL;
++
++	if (ath_create_gpio_led(sc, gpio, name, NULL, active_low) < 0)
++		return -EINVAL;
++
++	return count;
++}
++
++static const struct file_operations fops_gpio_led = {
++	.write = write_file_gpio_led,
++	.open = ath9k_debugfs_open,
++	.owner = THIS_MODULE,
++	.llseek = default_llseek,
++};
++
++#endif
++
+ void ath9k_debug_samp_bb_mac(struct ath_softc *sc)
+ {
+ #define ATH_SAMP_DBG(c) (sc->debug.bb_mac_samp[sc->debug.sampidx].c)
+@@ -1725,6 +1780,11 @@ int ath9k_init_debug(struct ath_hw *ah)
+ 	debugfs_create_file("samples", S_IRUSR, sc->debug.debugfs_phy, sc,
+ 			    &fops_samps);
+ 
++#ifdef CONFIG_MAC80211_LEDS
++	debugfs_create_file("gpio_led", S_IWUSR,
++			   sc->debug.debugfs_phy, sc, &fops_gpio_led);
++#endif
++
+ 	debugfs_create_u32("gpio_mask", S_IRUSR | S_IWUSR,
+ 			   sc->debug.debugfs_phy, &sc->sc_ah->gpio_mask);
+ 
diff --git a/package/mac80211/patches/581-ath9k_extra_platform_leds.patch b/package/mac80211/patches/581-ath9k_extra_platform_leds.patch
new file mode 100644
index 0000000000..0637269b34
--- /dev/null
+++ b/package/mac80211/patches/581-ath9k_extra_platform_leds.patch
@@ -0,0 +1,68 @@
+--- a/include/linux/ath9k_platform.h
++++ b/include/linux/ath9k_platform.h
+@@ -32,6 +32,9 @@ struct ath9k_platform_data {
+ 	bool is_clk_25mhz;
+ 	int (*get_mac_revision)(void);
+ 	int (*external_reset)(void);
++
++	int num_leds;
++	const struct gpio_led *leds;
+ };
+ 
+ #endif /* _LINUX_ATH9K_PLATFORM_H */
+--- a/drivers/net/wireless/ath/ath9k/gpio.c
++++ b/drivers/net/wireless/ath/ath9k/gpio.c
+@@ -14,6 +14,7 @@
+  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+  */
+ 
++#include <linux/ath9k_platform.h>
+ #include "ath9k.h"
+ 
+ /********************************/
+@@ -88,6 +89,24 @@ int ath_create_gpio_led(struct ath_softc
+ 	return ret;
+ }
+ 
++static int ath_create_platform_led(struct ath_softc *sc,
++				   const struct gpio_led *gpio)
++{
++	struct ath_led *led;
++	int ret;
++
++	led = kzalloc(sizeof(*led), GFP_KERNEL);
++	if (!led)
++		return -ENOMEM;
++
++	led->gpio = gpio;
++	ret = ath_add_led(sc, led);
++	if (ret < 0)
++		kfree(led);
++
++	return ret;
++}
++
+ void ath_deinit_leds(struct ath_softc *sc)
+ {
+ 	struct ath_led *led;
+@@ -103,8 +122,10 @@ void ath_deinit_leds(struct ath_softc *s
+ 
+ void ath_init_leds(struct ath_softc *sc)
+ {
++	struct ath9k_platform_data *pdata = sc->dev->platform_data;
+ 	char led_name[32];
+ 	const char *trigger;
++	int i;
+ 
+ 	INIT_LIST_HEAD(&sc->leds);
+ 
+@@ -133,6 +154,9 @@ void ath_init_leds(struct ath_softc *sc)
+ 		trigger = ieee80211_get_radio_led_name(sc->hw);
+ 
+ 	ath_create_gpio_led(sc, sc->sc_ah->led_pin, led_name, trigger, 1);
++
++	for (i = 0; i < pdata->num_leds; i++)
++		ath_create_platform_led(sc, &pdata->leds[i]);
+ }
+ #endif
+