#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/ioctl.h>
+#include <linux/timer.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 <linux/platform_device.h>
+#include <net/sock.h>
+#include <asm/uaccess.h>
#include <asm/semaphore.h>
#include <asm/uaccess.h>
#include <asm/ifxmips/ifxmips.h>
#define MAX_PORTS 2
#define PINS_PER_PORT 16
+#define DRVNAME "ifxmips_gpio"
+
static unsigned int ifxmips_gpio_major = 0;
+#ifdef CONFIG_IFXMIPS_GPIO_RST_BTN
+#define IFXMIPS_RST_PIN 15
+#define IFXMIPS_RST_PORT 1
+
+static struct timer_list rst_button_timer;
+
+extern struct sock *uevent_sock;
+extern u64 uevent_next_seqnum(void);
+static unsigned long seen;
+static int pressed = 0;
+
+struct event_t {
+ struct work_struct wq;
+ int set;
+ unsigned long jiffies;
+};
+#endif
+
/* TODO do we need this ? */
static struct semaphore port_sem;
ifxmips_port_set_open_drain (unsigned int port, unsigned int pin)
{
IFXMIPS_GPIO_SANITY;
- writel(readl(IFXMIPS_GPIO_P0_OD + (port * 0x30)) | (1 << pin), IFXMIPS_GPIO_P0_OD);
+ writel(readl(IFXMIPS_GPIO_P0_OD + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_OD + (port * 0xC));
return 0;
}
ifxmips_port_clear_open_drain (unsigned int port, unsigned int pin)
{
IFXMIPS_GPIO_SANITY;
- writel(readl(IFXMIPS_GPIO_P0_OD + (port * 0x30)) & ~(1 << pin), IFXMIPS_GPIO_P0_OD);
+ writel(readl(IFXMIPS_GPIO_P0_OD + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_OD + (port * 0xC));
return 0;
}
ifxmips_port_set_pudsel (unsigned int port, unsigned int pin)
{
IFXMIPS_GPIO_SANITY;
- writel(readl(IFXMIPS_GPIO_P0_PUDSEL + (port * 0x30)) | (1 << pin), IFXMIPS_GPIO_P0_PUDSEL);
+ writel(readl(IFXMIPS_GPIO_P0_PUDSEL + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_PUDSEL + (port * 0xC));
return 0;
}
ifxmips_port_clear_pudsel (unsigned int port, unsigned int pin)
{
IFXMIPS_GPIO_SANITY;
- writel(readl(IFXMIPS_GPIO_P0_PUDSEL + (port * 0x30)) & ~(1 << pin), IFXMIPS_GPIO_P0_PUDSEL);
+ writel(readl(IFXMIPS_GPIO_P0_PUDSEL + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_PUDSEL + (port * 0xC));
return 0;
}
ifxmips_port_set_puden (unsigned int port, unsigned int pin)
{
IFXMIPS_GPIO_SANITY;
- writel(readl(IFXMIPS_GPIO_P0_PUDEN + (port * 0x30)) | (1 << pin), IFXMIPS_GPIO_P0_PUDEN);
+ writel(readl(IFXMIPS_GPIO_P0_PUDEN + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_PUDEN + (port * 0xC));
return 0;
}
ifxmips_port_clear_puden (unsigned int port, unsigned int pin)
{
IFXMIPS_GPIO_SANITY;
- writel(readl(IFXMIPS_GPIO_P0_PUDEN + (port * 0x30)) & ~(1 << pin), IFXMIPS_GPIO_P0_PUDEN);
+ writel(readl(IFXMIPS_GPIO_P0_PUDEN + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_PUDEN + (port * 0xC));
return 0;
}
ifxmips_port_set_stoff (unsigned int port, unsigned int pin)
{
IFXMIPS_GPIO_SANITY;
- writel(readl(IFXMIPS_GPIO_P0_STOFF + (port * 0x30)) | (1 << pin), IFXMIPS_GPIO_P0_STOFF);
+ writel(readl(IFXMIPS_GPIO_P0_STOFF + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_STOFF + (port * 0xC));
return 0;
}
ifxmips_port_clear_stoff (unsigned int port, unsigned int pin)
{
IFXMIPS_GPIO_SANITY;
- writel(readl(IFXMIPS_GPIO_P0_STOFF + (port * 0x30)) & ~(1 << pin), IFXMIPS_GPIO_P0_STOFF);
+ writel(readl(IFXMIPS_GPIO_P0_STOFF + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_STOFF + (port * 0xC));
return 0;
}
ifxmips_port_set_dir_out (unsigned int port, unsigned int pin)
{
IFXMIPS_GPIO_SANITY;
- writel(readl(IFXMIPS_GPIO_P0_DIR + (port * 0x30)) | (1 << pin), IFXMIPS_GPIO_P0_DIR);
+ writel(readl(IFXMIPS_GPIO_P0_DIR + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_DIR + (port * 0xC));
return 0;
}
ifxmips_port_set_dir_in (unsigned int port, unsigned int pin)
{
IFXMIPS_GPIO_SANITY;
- writel(readl(IFXMIPS_GPIO_P0_DIR + (port * 0x30)) & ~(1 << pin), IFXMIPS_GPIO_P0_DIR);
+ writel(readl(IFXMIPS_GPIO_P0_DIR + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_DIR + (port * 0xC));
return 0;
}
ifxmips_port_set_output (unsigned int port, unsigned int pin)
{
IFXMIPS_GPIO_SANITY;
- writel(readl(IFXMIPS_GPIO_P0_OUT + (port * 0x30)) | (1 << pin), IFXMIPS_GPIO_P0_OUT);
+ writel(readl(IFXMIPS_GPIO_P0_OUT + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_OUT + (port * 0xC));
return 0;
}
ifxmips_port_clear_output (unsigned int port, unsigned int pin)
{
IFXMIPS_GPIO_SANITY;
- writel(readl(IFXMIPS_GPIO_P0_OUT + (port * 0x30)) & ~(1 << pin), IFXMIPS_GPIO_P0_OUT);
+ writel(readl(IFXMIPS_GPIO_P0_OUT + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_OUT + (port * 0xC));
return 0;
}
{
IFXMIPS_GPIO_SANITY;
- if (readl(IFXMIPS_GPIO_P0_IN + (port * 0x30)) & (1 << pin))
+ if (readl(IFXMIPS_GPIO_P0_IN + (port * 0xC)) & (1 << pin))
return 0;
else
return 1;
ifxmips_port_set_altsel0 (unsigned int port, unsigned int pin)
{
IFXMIPS_GPIO_SANITY;
- writel(readl(IFXMIPS_GPIO_P0_ALTSEL0 + (port * 0x30)) | (1 << pin), IFXMIPS_GPIO_P0_ALTSEL0);
+ writel(readl(IFXMIPS_GPIO_P0_ALTSEL0 + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_ALTSEL0 + (port * 0xC));
return 0;
}
ifxmips_port_clear_altsel0 (unsigned int port, unsigned int pin)
{
IFXMIPS_GPIO_SANITY;
- writel(readl(IFXMIPS_GPIO_P0_ALTSEL0 + (port * 0x30)) & ~(1 << pin), IFXMIPS_GPIO_P0_ALTSEL0);
+ writel(readl(IFXMIPS_GPIO_P0_ALTSEL0 + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_ALTSEL0 + (port * 0xC));
return 0;
}
ifxmips_port_set_altsel1 (unsigned int port, unsigned int pin)
{
IFXMIPS_GPIO_SANITY;
- writel(readl(IFXMIPS_GPIO_P0_ALTSEL1 + (port * 0x30)) | (1 << pin), IFXMIPS_GPIO_P0_ALTSEL1);
+ writel(readl(IFXMIPS_GPIO_P0_ALTSEL1 + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_ALTSEL1 + (port * 0xC));
return 0;
}
ifxmips_port_clear_altsel1 (unsigned int port, unsigned int pin)
{
IFXMIPS_GPIO_SANITY;
- writel(readl(IFXMIPS_GPIO_P0_ALTSEL1 + (port * 0x30)) & ~(1 << pin), IFXMIPS_GPIO_P0_ALTSEL1);
+ writel(readl(IFXMIPS_GPIO_P0_ALTSEL1 + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_ALTSEL1 + (port * 0xC));
return 0;
}
EXPORT_SYMBOL(ifxmips_port_clear_altsel1);
+#ifdef CONFIG_IFXMIPS_GPIO_RST_BTN
+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 void reset_button_poll(unsigned long unused)
+{
+ struct event_t *event;
+
+ rst_button_timer.expires = jiffies + HZ;
+ add_timer(&rst_button_timer);
+
+ if (pressed != ifxmips_port_get_input(IFXMIPS_RST_PORT, IFXMIPS_RST_PIN))
+ {
+ if(pressed)
+ pressed = 0;
+ else
+ pressed = 1;
+ printk("button was %s\n", (pressed ? "pressed" : "released"));
+ event = (struct event_t *) kzalloc(sizeof(struct event_t), GFP_ATOMIC);
+ if (!event)
+ {
+ printk("Could not alloc hotplug event\n");
+ return;
+ }
+ event->set = pressed;
+ event->jiffies = jiffies;
+ INIT_WORK(&event->wq, (void *)(void *)hotplug_button);
+ schedule_work(&event->wq);
+ seen = jiffies;
+ }
+}
+#endif
+
long ifxmips_port_read_procmem_helper(char* tag, u32* in_reg, char *buf)
{
u32 reg, bit = 0;
.ioctl = ifxmips_port_ioctl
};
-int __init
-ifxmips_gpio_init (void)
+static int
+ifxmips_gpio_probe (struct platform_device *dev)
{
int retval = 0;
sema_init (&port_sem, 1);
- ifxmips_gpio_major = register_chrdev(0, "ifxmips_gpio", &port_fops);
+ ifxmips_gpio_major = register_chrdev(0, DRVNAME, &port_fops);
if (!ifxmips_gpio_major)
{
- printk("ifxmips-port: Error! Could not register port device. #%d\n", ifxmips_gpio_major);
+ printk(KERN_INFO DRVNAME ": Error! Could not register port device. #%d\n", ifxmips_gpio_major);
retval = -EINVAL;
goto out;
}
- create_proc_read_entry("ifxmips_gpio", 0, NULL,
- ifxmips_port_read_procmem, NULL);
+ create_proc_read_entry(DRVNAME, 0, NULL, ifxmips_port_read_procmem, NULL);
+
+#ifdef CONFIG_IFXMIPS_GPIO_RST_BTN
+ ifxmips_port_set_open_drain(IFXMIPS_RST_PORT, IFXMIPS_RST_PIN);
+ ifxmips_port_clear_altsel0(IFXMIPS_RST_PORT, IFXMIPS_RST_PIN);
+ ifxmips_port_clear_altsel1(IFXMIPS_RST_PORT, IFXMIPS_RST_PIN);
+ ifxmips_port_set_dir_in(IFXMIPS_RST_PORT, IFXMIPS_RST_PIN);
+
+ seen = jiffies;
- printk("registered ifxmips gpio driver\n");
+ init_timer(&rst_button_timer);
+ rst_button_timer.function = reset_button_poll;
+ rst_button_timer.expires = jiffies + HZ;
+ add_timer(&rst_button_timer);
+#endif
+
+ printk(KERN_INFO DRVNAME ": device successfully initialized #%d.\n", ifxmips_gpio_major);
out:
return retval;
}
+static int
+ifxmips_gpio_remove (struct platform_device *pdev)
+{
+#ifdef CONFIG_IFXMIPS_GPIO_RST_BTN
+ del_timer_sync(&rst_button_timer);
+#endif
+ unregister_chrdev(ifxmips_gpio_major, DRVNAME);
+ remove_proc_entry(DRVNAME, NULL);
+
+ return 0;
+}
+
+static struct
+platform_driver ifxmips_gpio_driver = {
+ .probe = ifxmips_gpio_probe,
+ .remove = ifxmips_gpio_remove,
+ .driver = {
+ .name = DRVNAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+int __init
+ifxmips_gpio_init (void)
+{
+ int ret = platform_driver_register(&ifxmips_gpio_driver);
+ if (ret)
+ printk(KERN_INFO DRVNAME ": Error registering platfom driver!");
+ return ret;
+}
+
void __exit
ifxmips_gpio_exit (void)
{
- unregister_chrdev(ifxmips_gpio_major, "ifxmips_gpio");
- remove_proc_entry("ifxmips_gpio", NULL);
+ platform_driver_unregister(&ifxmips_gpio_driver);
}
module_init(ifxmips_gpio_init);
projects / openwrt.git / blobdiff