121 lines
2.6 KiB
C
121 lines
2.6 KiB
C
#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"
|
|
|
|
#define AR531X_RESET_GPIO_IRQ (AR531X_GPIO_IRQ_BASE + bcfg->resetConfigGpio)
|
|
|
|
struct event_t {
|
|
struct work_struct wq;
|
|
int set;
|
|
unsigned long jiffies;
|
|
};
|
|
|
|
static struct ar531x_boarddata *bcfg;
|
|
|
|
extern struct sock *uevent_sock;
|
|
extern u64 uevent_next_seqnum(void);
|
|
static unsigned long 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;
|
|
}
|
|
|
|
void ar531x_disable_reset_button(void)
|
|
{
|
|
disable_irq(AR531X_RESET_GPIO_IRQ);
|
|
}
|
|
|
|
EXPORT_SYMBOL(ar531x_disable_reset_button);
|
|
|
|
int __init ar531x_init_reset(void)
|
|
{
|
|
bcfg = (struct ar531x_boarddata *) board_config;
|
|
|
|
seen = jiffies;
|
|
|
|
request_irq(AR531X_RESET_GPIO_IRQ, &button_handler, IRQF_SAMPLE_RANDOM, "ar531x_reset", NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
module_init(ar531x_init_reset);
|