arcnet: com20020-pci: add led trigger support
The EAE PLX-PCI card has special leds on the the main io pci resource
bar. This patch adds support to trigger the conflict and data leds with
the packages.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
diff --git a/drivers/net/arcnet/arcnet.c b/drivers/net/arcnet/arcnet.c
index 542e2b4..4242522 100644
--- a/drivers/net/arcnet/arcnet.c
+++ b/drivers/net/arcnet/arcnet.c
@@ -52,6 +52,8 @@
#include <linux/init.h>
#include <linux/jiffies.h>
+#include <linux/leds.h>
+
#include "arcdevice.h"
#include "com9026.h"
@@ -189,6 +191,71 @@
#endif
+/* Trigger a LED event in response to a ARCNET device event */
+void arcnet_led_event(struct net_device *dev, enum arcnet_led_event event)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ unsigned long led_delay = 350;
+ unsigned long tx_delay = 50;
+
+ switch (event) {
+ case ARCNET_LED_EVENT_RECON:
+ led_trigger_blink_oneshot(lp->recon_led_trig,
+ &led_delay, &led_delay, 0);
+ break;
+ case ARCNET_LED_EVENT_OPEN:
+ led_trigger_event(lp->tx_led_trig, LED_OFF);
+ led_trigger_event(lp->recon_led_trig, LED_OFF);
+ break;
+ case ARCNET_LED_EVENT_STOP:
+ led_trigger_event(lp->tx_led_trig, LED_OFF);
+ led_trigger_event(lp->recon_led_trig, LED_OFF);
+ break;
+ case ARCNET_LED_EVENT_TX:
+ led_trigger_blink_oneshot(lp->tx_led_trig,
+ &tx_delay, &tx_delay, 0);
+ break;
+ }
+}
+EXPORT_SYMBOL_GPL(arcnet_led_event);
+
+static void arcnet_led_release(struct device *gendev, void *res)
+{
+ struct arcnet_local *lp = netdev_priv(to_net_dev(gendev));
+
+ led_trigger_unregister_simple(lp->tx_led_trig);
+ led_trigger_unregister_simple(lp->recon_led_trig);
+}
+
+/* Register ARCNET LED triggers for a arcnet device
+ *
+ * This is normally called from a driver's probe function
+ */
+void devm_arcnet_led_init(struct net_device *netdev, int index, int subid)
+{
+ struct arcnet_local *lp = netdev_priv(netdev);
+ void *res;
+
+ res = devres_alloc(arcnet_led_release, 0, GFP_KERNEL);
+ if (!res) {
+ netdev_err(netdev, "cannot register LED triggers\n");
+ return;
+ }
+
+ snprintf(lp->tx_led_trig_name, sizeof(lp->tx_led_trig_name),
+ "arc%d-%d-tx", index, subid);
+ snprintf(lp->recon_led_trig_name, sizeof(lp->recon_led_trig_name),
+ "arc%d-%d-recon", index, subid);
+
+ led_trigger_register_simple(lp->tx_led_trig_name,
+ &lp->tx_led_trig);
+ led_trigger_register_simple(lp->recon_led_trig_name,
+ &lp->recon_led_trig);
+
+ devres_add(&netdev->dev, res);
+}
+EXPORT_SYMBOL_GPL(devm_arcnet_led_init);
+
/* Unregister a protocol driver from the arc_proto_map. Protocol drivers
* are responsible for registering themselves, but the unregister routine
* is pretty generic so we'll do it here.
@@ -425,6 +492,7 @@
netif_start_queue(dev);
+ arcnet_led_event(dev, ARCNET_LED_EVENT_OPEN);
return 0;
out_module_put:
@@ -438,6 +506,7 @@
{
struct arcnet_local *lp = netdev_priv(dev);
+ arcnet_led_event(dev, ARCNET_LED_EVENT_STOP);
netif_stop_queue(dev);
/* flush TX and disable RX */
@@ -585,6 +654,8 @@
arc_printk(D_DEBUG, dev, "%s: %d: %s, status: %x\n",
__FILE__, __LINE__, __func__, lp->hw.status(dev));
+ arcnet_led_event(dev, ARCNET_LED_EVENT_TX);
+
spin_unlock_irqrestore(&lp->lock, flags);
return retval; /* no need to try again */
}
@@ -837,6 +908,7 @@
arc_printk(D_RECON, dev, "Network reconfiguration detected (status=%Xh)\n",
status);
+ arcnet_led_event(dev, ARCNET_LED_EVENT_RECON);
/* MYRECON bit is at bit 7 of diagstatus */
if (diagstatus & 0x80)
arc_printk(D_RECON, dev, "Put out that recon myself\n");