From 488a32cc9bb1febbbe4bc2bae804827cbeb9e27e Mon Sep 17 00:00:00 2001
From: nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Wed, 4 Jul 2007 03:55:23 +0000
Subject: refactor atheros system code - also add support for the reset button
 (sends netlink messages in the same format as broadcom-diag)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7869 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 .../atheros-2.6/files/arch/mips/atheros/reset.c    | 108 +++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 target/linux/atheros-2.6/files/arch/mips/atheros/reset.c

(limited to 'target/linux/atheros-2.6/files/arch/mips/atheros/reset.c')

diff --git a/target/linux/atheros-2.6/files/arch/mips/atheros/reset.c b/target/linux/atheros-2.6/files/arch/mips/atheros/reset.c
new file mode 100644
index 000000000..d62c5e1c4
--- /dev/null
+++ b/target/linux/atheros-2.6/files/arch/mips/atheros/reset.c
@@ -0,0 +1,108 @@
+#include <linux/module.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/kobject.h>
+#include <linux/workqueue.h>
+#include <linux/skbuff.h>
+#include <linux/netlink.h>
+#include <net/sock.h>
+#include <asm/uaccess.h>
+#include "ar531x.h"
+#include "ar5315/ar5315.h"
+
+struct event_t {
+	struct work_struct wq;
+	int set;
+	long int jiffies;
+};
+
+extern struct sock *uevent_sock;
+extern u64 uevent_next_seqnum(void);
+static int seen;
+
+static inline void add_msg(struct sk_buff *skb, char *msg)
+{
+	char *scratch;
+	scratch = skb_put(skb, strlen(msg) + 1);
+	sprintf(scratch, msg);
+}
+
+static void hotplug_button(struct work_struct *wq)
+{
+	struct sk_buff *skb;
+	struct event_t *event;
+	size_t len;
+	char *scratch, *s;
+	char buf[128];
+	
+	event = container_of(wq, struct event_t, wq);
+	if (!uevent_sock)
+		goto done;
+
+	/* allocate message with the maximum possible size */
+	s = event->set ? "pressed" : "released";
+	len = strlen(s) + 2;
+	skb = alloc_skb(len + 2048, GFP_KERNEL);
+	if (!skb)
+		goto done;
+	
+	/* add header */
+	scratch = skb_put(skb, len);
+	sprintf(scratch, "%s@",s);
+
+	/* copy keys to our continuous event payload buffer */
+	add_msg(skb, "HOME=/");
+	add_msg(skb, "PATH=/sbin:/bin:/usr/sbin:/usr/bin");
+	add_msg(skb, "SUBSYSTEM=button");
+	add_msg(skb, "BUTTON=reset");
+	add_msg(skb, (event->set ? "ACTION=pressed" : "ACTION=released"));
+	sprintf(buf, "SEEN=%ld", (event->jiffies - seen)/HZ);
+	add_msg(skb, buf);
+	snprintf(buf, 128, "SEQNUM=%llu", uevent_next_seqnum());
+	add_msg(skb, buf);
+
+	NETLINK_CB(skb).dst_group = 1;
+	netlink_broadcast(uevent_sock, skb, 0, 1, GFP_KERNEL);
+
+done:
+	kfree(event);
+}
+
+static irqreturn_t button_handler(int irq, void *dev_id)
+{
+	static int pressed = 0;
+	struct event_t *event;
+	u32 gpio = ~0;
+
+	event = (struct event_t *) kzalloc(sizeof(struct event_t), GFP_ATOMIC);
+	if (!event)
+		return IRQ_NONE;
+	
+	pressed = !pressed;
+
+	DO_AR5315(gpio = sysRegRead(AR5315_GPIO_DI);)
+	gpio &= 1 << (irq - AR531X_GPIO_IRQ_BASE);
+
+	event->set = gpio;
+	event->jiffies = jiffies;
+
+	INIT_WORK(&event->wq, (void *)(void *)hotplug_button);
+	schedule_work(&event->wq);
+
+	seen = jiffies;
+
+	return IRQ_HANDLED;
+}
+
+int __init ar531x_init_reset(void)
+{
+	struct ar531x_boarddata *bcfg;
+	bcfg = (struct ar531x_boarddata *) board_config;
+
+	seen = jiffies;
+	request_irq(AR531X_GPIO_IRQ_BASE + bcfg->resetConfigGpio, &button_handler, IRQF_SAMPLE_RANDOM, "ar531x_reset", NULL);
+
+	return 0;
+}
+
+module_init(ar531x_init_reset);
-- 
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