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path: root/drivers/net/wireless/broadcom/brcm80211/brcmsmac/led.c
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Diffstat (limited to 'drivers/net/wireless/broadcom/brcm80211/brcmsmac/led.c')
-rw-r--r--drivers/net/wireless/broadcom/brcm80211/brcmsmac/led.c126
1 files changed, 126 insertions, 0 deletions
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmsmac/led.c b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/led.c
new file mode 100644
index 000000000000..74b17cecb189
--- /dev/null
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/led.c
@@ -0,0 +1,126 @@
+#include <net/mac80211.h>
+#include <linux/bcma/bcma_driver_chipcommon.h>
+#include <linux/gpio.h>
+
+#include "mac80211_if.h"
+#include "pub.h"
+#include "main.h"
+#include "led.h"
+
+ /* number of leds */
+#define BRCMS_LED_NO 4
+ /* behavior mask */
+#define BRCMS_LED_BEH_MASK 0x7f
+ /* activelow (polarity) bit */
+#define BRCMS_LED_AL_MASK 0x80
+ /* radio enabled */
+#define BRCMS_LED_RADIO 3
+
+static void brcms_radio_led_ctrl(struct brcms_info *wl, bool state)
+{
+ if (wl->radio_led.gpio == -1)
+ return;
+
+ if (wl->radio_led.active_low)
+ state = !state;
+
+ if (state)
+ gpio_set_value(wl->radio_led.gpio, 1);
+ else
+ gpio_set_value(wl->radio_led.gpio, 0);
+}
+
+
+/* Callback from the LED subsystem. */
+static void brcms_led_brightness_set(struct led_classdev *led_dev,
+ enum led_brightness brightness)
+{
+ struct brcms_info *wl = container_of(led_dev,
+ struct brcms_info, led_dev);
+ brcms_radio_led_ctrl(wl, brightness);
+}
+
+void brcms_led_unregister(struct brcms_info *wl)
+{
+ if (wl->led_dev.dev)
+ led_classdev_unregister(&wl->led_dev);
+ if (wl->radio_led.gpio != -1)
+ gpio_free(wl->radio_led.gpio);
+}
+
+int brcms_led_register(struct brcms_info *wl)
+{
+ int i, err;
+ struct brcms_led *radio_led = &wl->radio_led;
+ /* get CC core */
+ struct bcma_drv_cc *cc_drv = &wl->wlc->hw->d11core->bus->drv_cc;
+ struct gpio_chip *bcma_gpio = &cc_drv->gpio;
+ struct ssb_sprom *sprom = &wl->wlc->hw->d11core->bus->sprom;
+ u8 *leds[] = { &sprom->gpio0,
+ &sprom->gpio1,
+ &sprom->gpio2,
+ &sprom->gpio3 };
+ unsigned gpio = -1;
+ bool active_low = false;
+
+ /* none by default */
+ radio_led->gpio = -1;
+ radio_led->active_low = false;
+
+ if (!bcma_gpio || !gpio_is_valid(bcma_gpio->base))
+ return -ENODEV;
+
+ /* find radio enabled LED */
+ for (i = 0; i < BRCMS_LED_NO; i++) {
+ u8 led = *leds[i];
+ if ((led & BRCMS_LED_BEH_MASK) == BRCMS_LED_RADIO) {
+ gpio = bcma_gpio->base + i;
+ if (led & BRCMS_LED_AL_MASK)
+ active_low = true;
+ break;
+ }
+ }
+
+ if (gpio == -1 || !gpio_is_valid(gpio))
+ return -ENODEV;
+
+ /* request and configure LED gpio */
+ err = gpio_request_one(gpio,
+ active_low ? GPIOF_OUT_INIT_HIGH
+ : GPIOF_OUT_INIT_LOW,
+ "radio on");
+ if (err) {
+ wiphy_err(wl->wiphy, "requesting led gpio %d failed (err: %d)\n",
+ gpio, err);
+ return err;
+ }
+ err = gpio_direction_output(gpio, 1);
+ if (err) {
+ wiphy_err(wl->wiphy, "cannot set led gpio %d to output (err: %d)\n",
+ gpio, err);
+ return err;
+ }
+
+ snprintf(wl->radio_led.name, sizeof(wl->radio_led.name),
+ "brcmsmac-%s:radio", wiphy_name(wl->wiphy));
+
+ wl->led_dev.name = wl->radio_led.name;
+ wl->led_dev.default_trigger =
+ ieee80211_get_radio_led_name(wl->pub->ieee_hw);
+ wl->led_dev.brightness_set = brcms_led_brightness_set;
+ err = led_classdev_register(wiphy_dev(wl->wiphy), &wl->led_dev);
+
+ if (err) {
+ wiphy_err(wl->wiphy, "cannot register led device: %s (err: %d)\n",
+ wl->radio_led.name, err);
+ return err;
+ }
+
+ wiphy_info(wl->wiphy, "registered radio enabled led device: %s gpio: %d\n",
+ wl->radio_led.name,
+ gpio);
+ radio_led->gpio = gpio;
+ radio_led->active_low = active_low;
+
+ return 0;
+}