drivers/net/wireless/realtek/rtl818x/rtl8187/leds.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/realtek/rtl818x/rtl8187/leds.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/realtek/rtl818x/rtl8187/leds.c
Extension
.c
Size
6419 bytes
Lines
243
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (brightness == LED_FULL) {
			ieee80211_queue_delayed_work(hw, &priv->led_on, 0);
			radio_on = true;
		} else if (radio_on) {
			radio_on = false;
			cancel_delayed_work(&priv->led_on);
			ieee80211_queue_delayed_work(hw, &priv->led_off, 0);
		}
	} else if (radio_on) {
		if (brightness == LED_OFF) {
			ieee80211_queue_delayed_work(hw, &priv->led_off, 0);
			/* The LED is off for 1/20 sec - it just blinks. */
			ieee80211_queue_delayed_work(hw, &priv->led_on,
						     HZ / 20);
		} else
			ieee80211_queue_delayed_work(hw, &priv->led_on, 0);
	}
}

static int rtl8187_register_led(struct ieee80211_hw *dev,
				struct rtl8187_led *led, const char *name,
				const char *default_trigger, u8 ledpin,
				bool is_radio)
{
	int err;
	struct rtl8187_priv *priv = dev->priv;

	if (led->dev)
		return -EEXIST;
	if (!default_trigger)
		return -EINVAL;
	led->dev = dev;
	led->ledpin = ledpin;
	led->is_radio = is_radio;
	strscpy(led->name, name, sizeof(led->name));

	led->led_dev.name = led->name;
	led->led_dev.default_trigger = default_trigger;
	led->led_dev.brightness_set = rtl8187_led_brightness_set;

	err = led_classdev_register(&priv->udev->dev, &led->led_dev);
	if (err) {
		printk(KERN_INFO "LEDs: Failed to register %s\n", name);
		led->dev = NULL;
		return err;
	}
	return 0;
}

static void rtl8187_unregister_led(struct rtl8187_led *led)
{
	struct ieee80211_hw *hw = led->dev;
	struct rtl8187_priv *priv = hw->priv;

	led_classdev_unregister(&led->led_dev);
	flush_delayed_work(&priv->led_off);
	led->dev = NULL;
}

void rtl8187_leds_init(struct ieee80211_hw *dev, u16 custid)
{
	struct rtl8187_priv *priv = dev->priv;
	char name[RTL8187_LED_MAX_NAME_LEN + 1];
	u8 ledpin;
	int err;

	/* According to the vendor driver, the LED operation depends on the
	 * customer ID encoded in the EEPROM
	 */
	printk(KERN_INFO "rtl8187: Customer ID is 0x%02X\n", custid);
	switch (custid) {
	case EEPROM_CID_RSVD0:
	case EEPROM_CID_RSVD1:
	case EEPROM_CID_SERCOMM_PS:
	case EEPROM_CID_QMI:
	case EEPROM_CID_DELL:
	case EEPROM_CID_TOSHIBA:
		ledpin = LED_PIN_GPIO0;
		break;
	case EEPROM_CID_ALPHA0:
		ledpin = LED_PIN_LED0;
		break;
	case EEPROM_CID_HW:
		ledpin = LED_PIN_HW;
		break;
	default:
		ledpin = LED_PIN_GPIO0;
	}

	INIT_DELAYED_WORK(&priv->led_on, led_turn_on);

Annotation

Implementation Notes