1 #include <linux/module.h>
2 #include <linux/timer.h>
3 #include <linux/interrupt.h>
4 #include <linux/kobject.h>
5 #include <linux/workqueue.h>
6 #include <linux/skbuff.h>
7 #include <linux/netlink.h>
9 #include <asm/uaccess.h>
11 #include "ar5315/ar5315.h"
14 struct work_struct wq;
19 extern struct sock *uevent_sock;
20 extern u64 uevent_next_seqnum(void);
23 static inline void add_msg(struct sk_buff *skb, char *msg)
26 scratch = skb_put(skb, strlen(msg) + 1);
27 sprintf(scratch, msg);
30 static void hotplug_button(struct work_struct *wq)
33 struct event_t *event;
38 event = container_of(wq, struct event_t, wq);
42 /* allocate message with the maximum possible size */
43 s = event->set ? "pressed" : "released";
45 skb = alloc_skb(len + 2048, GFP_KERNEL);
50 scratch = skb_put(skb, len);
51 sprintf(scratch, "%s@",s);
53 /* copy keys to our continuous event payload buffer */
54 add_msg(skb, "HOME=/");
55 add_msg(skb, "PATH=/sbin:/bin:/usr/sbin:/usr/bin");
56 add_msg(skb, "SUBSYSTEM=button");
57 add_msg(skb, "BUTTON=reset");
58 add_msg(skb, (event->set ? "ACTION=pressed" : "ACTION=released"));
59 sprintf(buf, "SEEN=%ld", (event->jiffies - seen)/HZ);
61 snprintf(buf, 128, "SEQNUM=%llu", uevent_next_seqnum());
64 NETLINK_CB(skb).dst_group = 1;
65 netlink_broadcast(uevent_sock, skb, 0, 1, GFP_KERNEL);
71 static irqreturn_t button_handler(int irq, void *dev_id)
73 static int pressed = 0;
74 struct event_t *event;
77 event = (struct event_t *) kzalloc(sizeof(struct event_t), GFP_ATOMIC);
83 DO_AR5315(gpio = sysRegRead(AR5315_GPIO_DI);)
84 gpio &= 1 << (irq - AR531X_GPIO_IRQ_BASE);
87 event->jiffies = jiffies;
89 INIT_WORK(&event->wq, (void *)(void *)hotplug_button);
90 schedule_work(&event->wq);
97 int __init ar531x_init_reset(void)
99 struct ar531x_boarddata *bcfg;
100 bcfg = (struct ar531x_boarddata *) board_config;
103 request_irq(AR531X_GPIO_IRQ_BASE + bcfg->resetConfigGpio, &button_handler, IRQF_SAMPLE_RANDOM, "ar531x_reset", NULL);
108 module_init(ar531x_init_reset);