cd864522b3
Add support for radio on led indicator. Control led via BCMA gpio driver. Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com> Reviewed-by: Hante Meuleman <meuleman@broadcom.com> Reviewed-by: Arend van Spriel <arend@broadcom.com> Signed-off-by: Piotr Haber <phaber@broadcom.com> [arend@broadcom.com: modify Makefile for conditional compile led.c] Signed-off-by: Arend van Spriel <arend@broadcom.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
126 lines
3 KiB
C
126 lines
3 KiB
C
#include <net/mac80211.h>
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#include <linux/bcma/bcma_driver_chipcommon.h>
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#include <linux/gpio.h>
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#include "mac80211_if.h"
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#include "pub.h"
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#include "main.h"
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#include "led.h"
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/* number of leds */
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#define BRCMS_LED_NO 4
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/* behavior mask */
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#define BRCMS_LED_BEH_MASK 0x7f
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/* activelow (polarity) bit */
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#define BRCMS_LED_AL_MASK 0x80
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/* radio enabled */
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#define BRCMS_LED_RADIO 3
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static void brcms_radio_led_ctrl(struct brcms_info *wl, bool state)
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{
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if (wl->radio_led.gpio == -1)
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return;
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if (wl->radio_led.active_low)
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state = !state;
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if (state)
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gpio_set_value(wl->radio_led.gpio, 1);
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else
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gpio_set_value(wl->radio_led.gpio, 0);
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}
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/* Callback from the LED subsystem. */
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static void brcms_led_brightness_set(struct led_classdev *led_dev,
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enum led_brightness brightness)
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{
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struct brcms_info *wl = container_of(led_dev,
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struct brcms_info, led_dev);
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brcms_radio_led_ctrl(wl, brightness);
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}
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void brcms_led_unregister(struct brcms_info *wl)
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{
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if (wl->led_dev.dev)
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led_classdev_unregister(&wl->led_dev);
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if (wl->radio_led.gpio != -1)
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gpio_free(wl->radio_led.gpio);
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}
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int brcms_led_register(struct brcms_info *wl)
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{
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int i, err;
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struct brcms_led *radio_led = &wl->radio_led;
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/* get CC core */
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struct bcma_drv_cc *cc_drv = &wl->wlc->hw->d11core->bus->drv_cc;
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struct gpio_chip *bcma_gpio = &cc_drv->gpio;
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struct ssb_sprom *sprom = &wl->wlc->hw->d11core->bus->sprom;
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u8 *leds[] = { &sprom->gpio0,
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&sprom->gpio1,
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&sprom->gpio2,
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&sprom->gpio3 };
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unsigned gpio = -1;
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bool active_low = false;
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/* none by default */
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radio_led->gpio = -1;
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radio_led->active_low = false;
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if (!bcma_gpio || !gpio_is_valid(bcma_gpio->base))
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return -ENODEV;
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/* find radio enabled LED */
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for (i = 0; i < BRCMS_LED_NO; i++) {
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u8 led = *leds[i];
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if ((led & BRCMS_LED_BEH_MASK) == BRCMS_LED_RADIO) {
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gpio = bcma_gpio->base + i;
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if (led & BRCMS_LED_AL_MASK)
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active_low = true;
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break;
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}
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}
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if (gpio == -1 || !gpio_is_valid(gpio))
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return -ENODEV;
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/* request and configure LED gpio */
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err = gpio_request_one(gpio,
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active_low ? GPIOF_OUT_INIT_HIGH
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: GPIOF_OUT_INIT_LOW,
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"radio on");
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if (err) {
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wiphy_err(wl->wiphy, "requesting led gpio %d failed (err: %d)\n",
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gpio, err);
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return err;
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}
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err = gpio_direction_output(gpio, 1);
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if (err) {
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wiphy_err(wl->wiphy, "cannot set led gpio %d to output (err: %d)\n",
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gpio, err);
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return err;
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}
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snprintf(wl->radio_led.name, sizeof(wl->radio_led.name),
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"brcmsmac-%s:radio", wiphy_name(wl->wiphy));
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wl->led_dev.name = wl->radio_led.name;
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wl->led_dev.default_trigger =
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ieee80211_get_radio_led_name(wl->pub->ieee_hw);
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wl->led_dev.brightness_set = brcms_led_brightness_set;
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err = led_classdev_register(wiphy_dev(wl->wiphy), &wl->led_dev);
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if (err) {
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wiphy_err(wl->wiphy, "cannot register led device: %s (err: %d)\n",
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wl->radio_led.name, err);
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return err;
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}
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wiphy_info(wl->wiphy, "registered radio enabled led device: %s gpio: %d\n",
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wl->radio_led.name,
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gpio);
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radio_led->gpio = gpio;
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radio_led->active_low = active_low;
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return 0;
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}
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