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Message-Id: <1444993260-9667-6-git-send-email-m.grzeschik@pengutronix.de>
Date: Fri, 16 Oct 2015 13:00:59 +0200
From: Michael Grzeschik <m.grzeschik@...gutronix.de>
To: davem@...emloft.net
Cc: joe@...ches.com, netdev@...r.kernel.org, kernel@...gutronix.de
Subject: [PATCH 5/6] 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@...gutronix.de>
---
drivers/net/arcnet/arcdevice.h | 19 ++++++++++
drivers/net/arcnet/arcnet.c | 72 ++++++++++++++++++++++++++++++++++++++
drivers/net/arcnet/com20020-pci.c | 73 +++++++++++++++++++++++++++++++++++++++
drivers/net/arcnet/com20020.h | 10 ++++++
4 files changed, 174 insertions(+)
diff --git a/drivers/net/arcnet/arcdevice.h b/drivers/net/arcnet/arcdevice.h
index d7fdea1..2edc0c0 100644
--- a/drivers/net/arcnet/arcdevice.h
+++ b/drivers/net/arcnet/arcdevice.h
@@ -237,6 +237,8 @@ struct Outgoing {
numsegs; /* number of segments */
};
+#define ARCNET_LED_NAME_SZ (IFNAMSIZ + 6)
+
struct arcnet_local {
uint8_t config, /* current value of CONFIG register */
timeout, /* Extended timeout for COM20020 */
@@ -260,6 +262,11 @@ struct arcnet_local {
/* On preemtive and SMB a lock is needed */
spinlock_t lock;
+ struct led_trigger *tx_led_trig;
+ char tx_led_trig_name[ARCNET_LED_NAME_SZ];
+ struct led_trigger *recon_led_trig;
+ char recon_led_trig_name[ARCNET_LED_NAME_SZ];
+
/*
* Buffer management: an ARCnet card has 4 x 512-byte buffers, each of
* which can be used for either sending or receiving. The new dynamic
@@ -309,6 +316,8 @@ struct arcnet_local {
int (*reset)(struct net_device *dev, int really_reset);
void (*open)(struct net_device *dev);
void (*close)(struct net_device *dev);
+ void (*datatrigger) (struct net_device * dev, int enable);
+ void (*recontrigger) (struct net_device * dev, int enable);
void (*copy_to_card)(struct net_device *dev, int bufnum,
int offset, void *buf, int count);
@@ -319,6 +328,16 @@ struct arcnet_local {
void __iomem *mem_start; /* pointer to ioremap'ed MMIO */
};
+enum arcnet_led_event {
+ ARCNET_LED_EVENT_RECON,
+ ARCNET_LED_EVENT_OPEN,
+ ARCNET_LED_EVENT_STOP,
+ ARCNET_LED_EVENT_TX,
+};
+
+void arcnet_led_event(struct net_device *netdev, enum arcnet_led_event event);
+void devm_arcnet_led_init(struct net_device *netdev, int index, int subid);
+
#if ARCNET_DEBUG_MAX & D_SKB
void arcnet_dump_skb(struct net_device *dev, struct sk_buff *skb, char *desc);
#else
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 @@ static void arcnet_dump_packet(struct net_device *dev, int bufnum,
#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 @@ int arcnet_open(struct net_device *dev)
netif_start_queue(dev);
+ arcnet_led_event(dev, ARCNET_LED_EVENT_OPEN);
return 0;
out_module_put:
@@ -438,6 +506,7 @@ int arcnet_close(struct net_device *dev)
{
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 @@ netdev_tx_t arcnet_send_packet(struct sk_buff *skb,
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 @@ irqreturn_t arcnet_interrupt(int irq, void *dev_id)
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");
diff --git a/drivers/net/arcnet/com20020-pci.c b/drivers/net/arcnet/com20020-pci.c
index 637a611..239de38 100644
--- a/drivers/net/arcnet/com20020-pci.c
+++ b/drivers/net/arcnet/com20020-pci.c
@@ -41,6 +41,7 @@
#include <linux/pci.h>
#include <linux/list.h>
#include <linux/io.h>
+#include <linux/leds.h>
#include "arcdevice.h"
#include "com20020.h"
@@ -62,6 +63,36 @@ module_param(clockp, int, 0);
module_param(clockm, int, 0);
MODULE_LICENSE("GPL");
+static void led_tx_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct com20020_dev *card;
+ struct com20020_priv *priv;
+ struct com20020_pci_card_info *ci;
+
+ card = container_of(led_cdev, struct com20020_dev, tx_led);
+
+ priv = card->pci_priv;
+ ci = priv->ci;
+
+ outb(!!value, priv->misc + ci->leds[card->index].green);
+}
+
+static void led_recon_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct com20020_dev *card;
+ struct com20020_priv *priv;
+ struct com20020_pci_card_info *ci;
+
+ card = container_of(led_cdev, struct com20020_dev, recon_led);
+
+ priv = card->pci_priv;
+ ci = priv->ci;
+
+ outb(!!value, priv->misc + ci->leds[card->index].red);
+}
+
static void com20020pci_remove(struct pci_dev *pdev);
static int com20020pci_probe(struct pci_dev *pdev,
@@ -170,14 +201,41 @@ static int com20020pci_probe(struct pci_dev *pdev,
card->index = i;
card->pci_priv = priv;
+ card->tx_led.brightness_set = led_tx_set;
+ card->tx_led.default_trigger = devm_kasprintf(&pdev->dev,
+ GFP_KERNEL, "arc%d-%d-tx",
+ dev->dev_id, i);
+ card->tx_led.name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
+ "pci:green:tx:%d-%d",
+ dev->dev_id, i);
+
+ card->tx_led.dev = &dev->dev;
+ card->recon_led.brightness_set = led_recon_set;
+ card->recon_led.default_trigger = devm_kasprintf(&pdev->dev,
+ GFP_KERNEL, "arc%d-%d-recon",
+ dev->dev_id, i);
+ card->recon_led.name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
+ "pci:red:recon:%d-%d",
+ dev->dev_id, i);
+ card->recon_led.dev = &dev->dev;
card->dev = dev;
+ ret = devm_led_classdev_register(&pdev->dev, &card->tx_led);
+ if (ret)
+ goto out_port;
+
+ ret = devm_led_classdev_register(&pdev->dev, &card->recon_led);
+ if (ret)
+ goto out_port;
+
dev_set_drvdata(&dev->dev, card);
ret = com20020_found(dev, IRQF_SHARED);
if (ret)
goto out_port;
+ devm_arcnet_led_init(dev, dev->dev_id, i);
+
list_add(&card->list, &priv->list_dev);
}
@@ -261,6 +319,12 @@ static struct com20020_pci_card_info card_info_eae_arc1 = {
.offset = 0x10,
.size = 0x04,
},
+ .leds = {
+ {
+ .green = 0x0,
+ .red = 0x1,
+ },
+ },
.rotary = 0x0,
.flags = ARC_CAN_10MBIT,
};
@@ -284,6 +348,15 @@ static struct com20020_pci_card_info card_info_eae_ma1 = {
.offset = 0x10,
.size = 0x04,
},
+ .leds = {
+ {
+ .green = 0x0,
+ .red = 0x1,
+ }, {
+ .green = 0x2,
+ .red = 0x3,
+ },
+ },
.rotary = 0x0,
.flags = ARC_CAN_10MBIT,
};
diff --git a/drivers/net/arcnet/com20020.h b/drivers/net/arcnet/com20020.h
index 4363b65..cd98223 100644
--- a/drivers/net/arcnet/com20020.h
+++ b/drivers/net/arcnet/com20020.h
@@ -26,6 +26,7 @@
*/
#ifndef __COM20020_H
#define __COM20020_H
+#include <linux/leds.h>
int com20020_check(struct net_device *dev);
int com20020_found(struct net_device *dev, int shared);
@@ -36,6 +37,11 @@ extern const struct net_device_ops com20020_netdev_ops;
#define PLX_PCI_MAX_CARDS 2
+struct ledoffsets {
+ int green;
+ int red;
+};
+
struct com20020_pci_channel_map {
u32 bar;
u32 offset;
@@ -49,6 +55,7 @@ struct com20020_pci_card_info {
struct com20020_pci_channel_map chan_map_tbl[PLX_PCI_MAX_CARDS];
struct com20020_pci_channel_map misc_map;
+ struct ledoffsets leds[PLX_PCI_MAX_CARDS];
int rotary;
unsigned int flags;
@@ -64,6 +71,9 @@ struct com20020_dev {
struct list_head list;
struct net_device *dev;
+ struct led_classdev tx_led;
+ struct led_classdev recon_led;
+
struct com20020_priv *pci_priv;
int index;
};
--
2.6.1
--
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