switch: allow Ethernet port LEDs to show specific port speeds only

This patch adds speed_mask special file to LEDs connected to switch ports
via 'switch' trigger. It allows to choose which speeds to signal when link
is up. If router has more than one LED per port, they may light up
differently depending on how fast connection is. Default setting is 'all
speeds' so backward compatibility with system scripts (for example uci) is
maintained.

Signed-off-by: Michal Cieslakiewicz <[email protected]>

SVN-Revision: 48775

target/linux/generic/files/drivers/net/phy/swconfig_leds.c

@@ -20,6 +20,15 @@
 #define SWCONFIG_LED_TIMER_INTERVAL	(HZ / 10)
 #define SWCONFIG_LED_NUM_PORTS		32
 
+#define SWCONFIG_LED_PORT_SPEED_NA	0x01	/* unknown speed */
+#define SWCONFIG_LED_PORT_SPEED_10	0x02	/* 10 Mbps */
+#define SWCONFIG_LED_PORT_SPEED_100	0x04	/* 100 Mbps */
+#define SWCONFIG_LED_PORT_SPEED_1000	0x08	/* 1000 Mbps */
+#define SWCONFIG_LED_PORT_SPEED_ALL	(SWCONFIG_LED_PORT_SPEED_NA | \
+					 SWCONFIG_LED_PORT_SPEED_10 | \
+					 SWCONFIG_LED_PORT_SPEED_100 | \
+					 SWCONFIG_LED_PORT_SPEED_1000)
+
 struct switch_led_trigger {
 	struct led_trigger trig;
 	struct switch_dev *swdev;
@@ -28,6 +37,7 @@ struct switch_led_trigger {
 	u32 port_mask;
 	u32 port_link;
 	unsigned long port_traffic[SWCONFIG_LED_NUM_PORTS];
+	u8 link_speed[SWCONFIG_LED_NUM_PORTS];
 };
 
 struct swconfig_trig_data {
@@ -40,6 +50,7 @@ struct swconfig_trig_data {
 	bool prev_link;
 	unsigned long prev_traffic;
 	enum led_brightness prev_brightness;
+	u8 speed_mask;
 };
 
 static void
@@ -135,6 +146,46 @@ swconfig_trig_port_mask_show(struct device *dev, struct device_attribute *attr,
 static DEVICE_ATTR(port_mask, 0644, swconfig_trig_port_mask_show,
 		   swconfig_trig_port_mask_store);
 
+/* speed_mask file handler - display value */
+static ssize_t swconfig_trig_speed_mask_show(struct device *dev,
+					     struct device_attribute *attr,
+					     char *buf)
+{
+	struct led_classdev *led_cdev = dev_get_drvdata(dev);
+	struct swconfig_trig_data *trig_data = led_cdev->trigger_data;
+
+	read_lock(&trig_data->lock);
+	sprintf(buf, "%#x\n", trig_data->speed_mask);
+	read_unlock(&trig_data->lock);
+
+	return strlen(buf) + 1;
+}
+
+/* speed_mask file handler - store value */
+static ssize_t swconfig_trig_speed_mask_store(struct device *dev,
+					      struct device_attribute *attr,
+					      const char *buf, size_t size)
+{
+	struct led_classdev *led_cdev = dev_get_drvdata(dev);
+	struct swconfig_trig_data *trig_data = led_cdev->trigger_data;
+	u8 speed_mask;
+	int ret;
+
+	ret = kstrtou8(buf, 0, &speed_mask);
+	if (ret)
+		return ret;
+
+	write_lock(&trig_data->lock);
+	trig_data->speed_mask = speed_mask & SWCONFIG_LED_PORT_SPEED_ALL;
+	write_unlock(&trig_data->lock);
+
+	return size;
+}
+
+/* speed_mask special file */
+static DEVICE_ATTR(speed_mask, 0644, swconfig_trig_speed_mask_show,
+		   swconfig_trig_speed_mask_store);
+
 static void
 swconfig_trig_activate(struct led_classdev *led_cdev)
 {
@@ -154,14 +205,22 @@ swconfig_trig_activate(struct led_classdev *led_cdev)
 	rwlock_init(&trig_data->lock);
 	trig_data->led_cdev = led_cdev;
 	trig_data->swdev = sw_trig->swdev;
+	trig_data->speed_mask = SWCONFIG_LED_PORT_SPEED_ALL;
 	led_cdev->trigger_data = trig_data;
 
 	err = device_create_file(led_cdev->dev, &dev_attr_port_mask);
 	if (err)
 		goto err_free;
 
+	err = device_create_file(led_cdev->dev, &dev_attr_speed_mask);
+	if (err)
+		goto err_dev_free;
+
 	return;
 
+err_dev_free:
+	device_remove_file(led_cdev->dev, &dev_attr_port_mask);
+
 err_free:
 	led_cdev->trigger_data = NULL;
 	kfree(trig_data);
@@ -177,6 +236,7 @@ swconfig_trig_deactivate(struct led_classdev *led_cdev)
 	trig_data = (void *) led_cdev->trigger_data;
 	if (trig_data) {
 		device_remove_file(led_cdev->dev, &dev_attr_port_mask);
+		device_remove_file(led_cdev->dev, &dev_attr_speed_mask);
 		kfree(trig_data);
 	}
 }
@@ -188,6 +248,7 @@ swconfig_trig_led_event(struct switch_led_trigger *sw_trig,
 	struct swconfig_trig_data *trig_data;
 	u32 port_mask;
 	bool link;
+	u8 speed_mask;
 
 	trig_data = led_cdev->trigger_data;
 	if (!trig_data)
@@ -195,6 +256,7 @@ swconfig_trig_led_event(struct switch_led_trigger *sw_trig,
 
 	read_lock(&trig_data->lock);
 	port_mask = trig_data->port_mask;
+	speed_mask = trig_data->speed_mask;
 	read_unlock(&trig_data->lock);
 
 	link = !!(sw_trig->port_link & port_mask);
@@ -203,17 +265,28 @@ swconfig_trig_led_event(struct switch_led_trigger *sw_trig,
 			swconfig_trig_set_brightness(trig_data, LED_OFF);
 	} else {
 		unsigned long traffic;
+		int speedok;	/* link speed flag */
 		int i;
 
 		traffic = 0;
+		speedok = 0;
 		for (i = 0; i < SWCONFIG_LED_NUM_PORTS; i++) {
 			if (port_mask & (1 << i))
-				traffic += sw_trig->port_traffic[i];
+				if (sw_trig->link_speed[i] & speed_mask) {
+					traffic += sw_trig->port_traffic[i];
+					speedok = 1;
+				}
 		}
 
-		if (trig_data->prev_brightness != LED_FULL)
-			swconfig_trig_set_brightness(trig_data, LED_FULL);
-		else if (traffic != trig_data->prev_traffic)
+		if (speedok) {
+			/* At least one port speed matches speed_mask */
+			if (trig_data->prev_brightness != LED_FULL)
+				swconfig_trig_set_brightness(trig_data,
+							     LED_FULL);
+			else if (traffic != trig_data->prev_traffic)
+				swconfig_trig_set_brightness(trig_data,
+							     LED_OFF);
+		} else if (trig_data->prev_brightness != LED_OFF)
 			swconfig_trig_set_brightness(trig_data, LED_OFF);
 
 		trig_data->prev_traffic = traffic;
@@ -258,6 +331,8 @@ swconfig_led_work_func(struct work_struct *work)
 	for (i = 0; i < SWCONFIG_LED_NUM_PORTS; i++) {
 		u32 port_bit;
 
+		sw_trig->link_speed[i] = 0;
+
 		port_bit = BIT(i);
 		if ((port_mask & port_bit) == 0)
 			continue;
@@ -268,8 +343,27 @@ swconfig_led_work_func(struct work_struct *work)
 			memset(&port_link, '\0', sizeof(port_link));
 			swdev->ops->get_port_link(swdev, i, &port_link);
 
-			if (port_link.link)
+			if (port_link.link) {
 				link |= port_bit;
+				switch (port_link.speed) {
+				case SWITCH_PORT_SPEED_UNKNOWN:
+					sw_trig->link_speed[i] =
+						SWCONFIG_LED_PORT_SPEED_NA;
+					break;
+				case SWITCH_PORT_SPEED_10:
+					sw_trig->link_speed[i] =
+						SWCONFIG_LED_PORT_SPEED_10;
+					break;
+				case SWITCH_PORT_SPEED_100:
+					sw_trig->link_speed[i] =
+						SWCONFIG_LED_PORT_SPEED_100;
+					break;
+				case SWITCH_PORT_SPEED_1000:
+					sw_trig->link_speed[i] =
+						SWCONFIG_LED_PORT_SPEED_1000;
+					break;
+				}
+			}
 		}
 
 		if (swdev->ops->get_port_stats) {