Release 4.11 drivers/net/wireless/broadcom/brcm80211/brcmsmac/led.c
#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);
}
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/* 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);
}
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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);
}
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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;
}
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