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115 lines
2.8 KiB
115 lines
2.8 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <net/mac80211.h> |
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#include <linux/bcma/bcma_driver_chipcommon.h> |
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#include <linux/gpio/driver.h> |
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#include <linux/gpio/machine.h> |
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#include <linux/gpio/consumer.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.gpiod) |
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return; |
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if (state) |
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gpiod_set_value(wl->radio_led.gpiod, 1); |
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else |
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gpiod_set_value(wl->radio_led.gpiod, 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.gpiod) |
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gpiochip_free_own_desc(wl->radio_led.gpiod); |
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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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int hwnum = -1; |
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enum gpio_lookup_flags lflags = GPIO_ACTIVE_HIGH; |
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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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hwnum = i; |
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if (led & BRCMS_LED_AL_MASK) |
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lflags = GPIO_ACTIVE_LOW; |
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break; |
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} |
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} |
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/* No LED, bail out */ |
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if (hwnum == -1) |
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return -ENODEV; |
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/* Try to obtain this LED GPIO line */ |
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radio_led->gpiod = gpiochip_request_own_desc(bcma_gpio, hwnum, |
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"radio on", lflags, |
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GPIOD_OUT_LOW); |
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if (IS_ERR(radio_led->gpiod)) { |
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err = PTR_ERR(radio_led->gpiod); |
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wiphy_err(wl->wiphy, "requesting led GPIO failed (err: %d)\n", |
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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\n", |
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wl->radio_led.name); |
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return 0; |
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}
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