172 lines
3.9 KiB
Diff
172 lines
3.9 KiB
Diff
--- a/arch/mips/ar231x/Makefile
|
|
+++ b/arch/mips/ar231x/Makefile
|
|
@@ -8,7 +8,7 @@
|
|
# Copyright (C) 2006-2009 Felix Fietkau <nbd@openwrt.org>
|
|
#
|
|
|
|
-obj-y += board.o prom.o devices.o
|
|
+obj-y += board.o prom.o devices.o reset.o
|
|
obj-$(CONFIG_ATHEROS_AR5312) += ar5312.o
|
|
obj-$(CONFIG_ATHEROS_AR2315) += ar2315.o
|
|
obj-$(CONFIG_ATHEROS_AR2315_PCI) += pci.o
|
|
--- /dev/null
|
|
+++ b/arch/mips/ar231x/reset.c
|
|
@@ -0,0 +1,157 @@
|
|
+#include <linux/init.h>
|
|
+#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 <ar231x_platform.h>
|
|
+#include <ar231x.h>
|
|
+#include <gpio.h>
|
|
+#include "devices.h"
|
|
+
|
|
+#define AR531X_RESET_GPIO_IRQ (AR531X_GPIO_IRQ(ar231x_board.config->resetConfigGpio))
|
|
+
|
|
+struct event_t {
|
|
+ struct work_struct wq;
|
|
+ int set;
|
|
+ unsigned long jiffies;
|
|
+};
|
|
+
|
|
+static struct timer_list rst_button_timer;
|
|
+static unsigned long seen;
|
|
+
|
|
+extern struct sock *uevent_sock;
|
|
+extern u64 uevent_next_seqnum(void);
|
|
+
|
|
+static int no_release_workaround = 1;
|
|
+module_param(no_release_workaround, int, 0);
|
|
+
|
|
+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(NLMSG_GOODSIZE, 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 void
|
|
+reset_button_poll(unsigned long unused)
|
|
+{
|
|
+ struct event_t *event;
|
|
+ int gpio = ~0;
|
|
+
|
|
+ if(!no_release_workaround)
|
|
+ return;
|
|
+
|
|
+ gpio = ar231x_gpiodev->get();
|
|
+ gpio &= (1 << (AR531X_RESET_GPIO_IRQ - AR531X_GPIO_IRQ_BASE));
|
|
+ if(gpio) {
|
|
+ rst_button_timer.expires = jiffies + (HZ / 4);
|
|
+ add_timer(&rst_button_timer);
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ event = (struct event_t *) kzalloc(sizeof(struct event_t), GFP_ATOMIC);
|
|
+ if (!event)
|
|
+ return;
|
|
+
|
|
+ event->set = 0;
|
|
+ event->jiffies = jiffies;
|
|
+ INIT_WORK(&event->wq, hotplug_button);
|
|
+ schedule_work(&event->wq);
|
|
+}
|
|
+
|
|
+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;
|
|
+
|
|
+ gpio = ar231x_gpiodev->get() & (1 << (irq - AR531X_GPIO_IRQ_BASE));
|
|
+
|
|
+ event->set = gpio;
|
|
+ if(!event->set)
|
|
+ no_release_workaround = 0;
|
|
+
|
|
+ event->jiffies = jiffies;
|
|
+
|
|
+ INIT_WORK(&event->wq, hotplug_button);
|
|
+ schedule_work(&event->wq);
|
|
+
|
|
+ seen = jiffies;
|
|
+ if(event->set && no_release_workaround)
|
|
+ mod_timer(&rst_button_timer, jiffies + (HZ / 4));
|
|
+
|
|
+ return IRQ_HANDLED;
|
|
+}
|
|
+
|
|
+
|
|
+static int __init
|
|
+ar231x_init_reset(void)
|
|
+{
|
|
+ seen = jiffies;
|
|
+
|
|
+ init_timer(&rst_button_timer);
|
|
+ rst_button_timer.function = reset_button_poll;
|
|
+ rst_button_timer.expires = jiffies + HZ / 50;
|
|
+ add_timer(&rst_button_timer);
|
|
+
|
|
+ request_irq(AR531X_RESET_GPIO_IRQ, &button_handler, IRQF_SAMPLE_RANDOM, "ar231x_reset", NULL);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+module_init(ar231x_init_reset);
|