diff options
Diffstat (limited to 'target/linux/atheros/patches-2.6.37/210-reset_button.patch')
| -rw-r--r-- | target/linux/atheros/patches-2.6.37/210-reset_button.patch | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/target/linux/atheros/patches-2.6.37/210-reset_button.patch b/target/linux/atheros/patches-2.6.37/210-reset_button.patch new file mode 100644 index 0000000000..3c91818146 --- /dev/null +++ b/target/linux/atheros/patches-2.6.37/210-reset_button.patch @@ -0,0 +1,174 @@ +--- 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_EARLY_PRINTK) += early_printk.o + +--- /dev/null ++++ b/arch/mips/ar231x/reset.c +@@ -0,0 +1,160 @@ ++#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; ++ ++ if (ar231x_board.config->resetConfigGpio == 0xffff) ++ return -ENODEV; ++ ++ 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); |