565 lines
15 KiB
C
565 lines
15 KiB
C
/*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
|
|
*
|
|
* Copyright (C) 2005 infineon
|
|
* Copyright (C) 2007 John Crispin <blogic@openwrt.org>
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/errno.h>
|
|
#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 <net/sock.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/semaphore.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/ifxmips/ifxmips.h>
|
|
#include <asm/ifxmips/ifxmips_ioctl.h>
|
|
|
|
#define MAX_PORTS 2
|
|
#define PINS_PER_PORT 16
|
|
|
|
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;
|
|
|
|
/* TODO do we really need this ? return in a define is forbidden by coding style */
|
|
#define IFXMIPS_GPIO_SANITY {if (port > MAX_PORTS || pin > PINS_PER_PORT) return -EINVAL; }
|
|
|
|
int
|
|
ifxmips_port_reserve_pin (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
printk("%s : call to obseleted function\n", __func__);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ifxmips_port_reserve_pin);
|
|
|
|
int
|
|
ifxmips_port_free_pin (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
printk("%s : call to obseleted function\n", __func__);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ifxmips_port_free_pin);
|
|
|
|
int
|
|
ifxmips_port_set_open_drain (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
writel(readl(IFXMIPS_GPIO_P0_OD + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_OD + (port * 0xC));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ifxmips_port_set_open_drain);
|
|
|
|
int
|
|
ifxmips_port_clear_open_drain (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
writel(readl(IFXMIPS_GPIO_P0_OD + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_OD + (port * 0xC));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ifxmips_port_clear_open_drain);
|
|
|
|
int
|
|
ifxmips_port_set_pudsel (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
writel(readl(IFXMIPS_GPIO_P0_PUDSEL + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_PUDSEL + (port * 0xC));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ifxmips_port_set_pudsel);
|
|
|
|
int
|
|
ifxmips_port_clear_pudsel (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
writel(readl(IFXMIPS_GPIO_P0_PUDSEL + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_PUDSEL + (port * 0xC));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ifxmips_port_clear_pudsel);
|
|
|
|
int
|
|
ifxmips_port_set_puden (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
writel(readl(IFXMIPS_GPIO_P0_PUDEN + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_PUDEN + (port * 0xC));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ifxmips_port_set_puden);
|
|
|
|
int
|
|
ifxmips_port_clear_puden (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
writel(readl(IFXMIPS_GPIO_P0_PUDEN + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_PUDEN + (port * 0xC));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ifxmips_port_clear_puden);
|
|
|
|
int
|
|
ifxmips_port_set_stoff (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
writel(readl(IFXMIPS_GPIO_P0_STOFF + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_STOFF + (port * 0xC));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ifxmips_port_set_stoff);
|
|
|
|
int
|
|
ifxmips_port_clear_stoff (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
writel(readl(IFXMIPS_GPIO_P0_STOFF + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_STOFF + (port * 0xC));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ifxmips_port_clear_stoff);
|
|
|
|
int
|
|
ifxmips_port_set_dir_out (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
writel(readl(IFXMIPS_GPIO_P0_DIR + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_DIR + (port * 0xC));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ifxmips_port_set_dir_out);
|
|
|
|
int
|
|
ifxmips_port_set_dir_in (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
writel(readl(IFXMIPS_GPIO_P0_DIR + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_DIR + (port * 0xC));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ifxmips_port_set_dir_in);
|
|
|
|
int
|
|
ifxmips_port_set_output (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
writel(readl(IFXMIPS_GPIO_P0_OUT + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_OUT + (port * 0xC));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ifxmips_port_set_output);
|
|
|
|
int
|
|
ifxmips_port_clear_output (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
writel(readl(IFXMIPS_GPIO_P0_OUT + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_OUT + (port * 0xC));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ifxmips_port_clear_output);
|
|
|
|
int
|
|
ifxmips_port_get_input (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
|
|
if (readl(IFXMIPS_GPIO_P0_IN + (port * 0xC)) & (1 << pin))
|
|
return 0;
|
|
else
|
|
return 1;
|
|
}
|
|
EXPORT_SYMBOL(ifxmips_port_get_input);
|
|
|
|
int
|
|
ifxmips_port_set_altsel0 (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
writel(readl(IFXMIPS_GPIO_P0_ALTSEL0 + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_ALTSEL0 + (port * 0xC));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ifxmips_port_set_altsel0);
|
|
|
|
int
|
|
ifxmips_port_clear_altsel0 (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
writel(readl(IFXMIPS_GPIO_P0_ALTSEL0 + (port * 0xC)) & ~(1 << pin), IFXMIPS_GPIO_P0_ALTSEL0 + (port * 0xC));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ifxmips_port_clear_altsel0);
|
|
|
|
int
|
|
ifxmips_port_set_altsel1 (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
writel(readl(IFXMIPS_GPIO_P0_ALTSEL1 + (port * 0xC)) | (1 << pin), IFXMIPS_GPIO_P0_ALTSEL1 + (port * 0xC));
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ifxmips_port_set_altsel1);
|
|
|
|
int
|
|
ifxmips_port_clear_altsel1 (unsigned int port, unsigned int pin)
|
|
{
|
|
IFXMIPS_GPIO_SANITY;
|
|
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;
|
|
unsigned int len, t;
|
|
|
|
len = sprintf(buf, "\n%s: ", tag);
|
|
reg = readl(in_reg);
|
|
bit = 0x80000000;
|
|
for (t = 0; t < 32; t++) {
|
|
if ((reg & bit) > 0)
|
|
len = len + sprintf(buf + len, "X");
|
|
else
|
|
len = len + sprintf(buf + len, " ");
|
|
bit = bit >> 1;
|
|
}
|
|
|
|
return len;
|
|
}
|
|
|
|
int
|
|
ifxmips_port_read_procmem (char *buf, char **start, off_t offset, int count,
|
|
int *eof, void *data)
|
|
{
|
|
long len = sprintf (buf, "\nIFXMips Port Settings\n");
|
|
|
|
len += sprintf (buf + len,
|
|
" 3 2 1 0\n");
|
|
len += sprintf (buf + len,
|
|
" 10987654321098765432109876543210\n");
|
|
len += sprintf (buf + len,
|
|
"----------------------------------------\n");
|
|
|
|
len += ifxmips_port_read_procmem_helper("P0-OUT", IFXMIPS_GPIO_P0_OUT, &buf[len]);
|
|
len += ifxmips_port_read_procmem_helper("P1-OUT", IFXMIPS_GPIO_P1_OUT, &buf[len]);
|
|
len += ifxmips_port_read_procmem_helper("P0-IN ", IFXMIPS_GPIO_P0_IN, &buf[len]);
|
|
len += ifxmips_port_read_procmem_helper("P1-IN ", IFXMIPS_GPIO_P1_IN, &buf[len]);
|
|
len += ifxmips_port_read_procmem_helper("P0-DIR", IFXMIPS_GPIO_P0_DIR, &buf[len]);
|
|
len += ifxmips_port_read_procmem_helper("P1-DIR", IFXMIPS_GPIO_P1_DIR, &buf[len]);
|
|
len += ifxmips_port_read_procmem_helper("P0-STO ", IFXMIPS_GPIO_P0_STOFF, &buf[len]);
|
|
len += ifxmips_port_read_procmem_helper("P1-STO ", IFXMIPS_GPIO_P1_STOFF, &buf[len]);
|
|
len += ifxmips_port_read_procmem_helper("P0-PUDE", IFXMIPS_GPIO_P0_PUDEN, &buf[len]);
|
|
len += ifxmips_port_read_procmem_helper("P1-PUDE", IFXMIPS_GPIO_P1_PUDEN, &buf[len]);
|
|
len += ifxmips_port_read_procmem_helper("P0-OD ", IFXMIPS_GPIO_P0_OD, &buf[len]);
|
|
len += ifxmips_port_read_procmem_helper("P1-OD ", IFXMIPS_GPIO_P1_OD, &buf[len]);
|
|
len += ifxmips_port_read_procmem_helper("P0-PUDS", IFXMIPS_GPIO_P0_PUDSEL, &buf[len]);
|
|
len += ifxmips_port_read_procmem_helper("P1-PUDS", IFXMIPS_GPIO_P1_PUDSEL, &buf[len]);
|
|
len += ifxmips_port_read_procmem_helper("P0-ALT0", IFXMIPS_GPIO_P0_ALTSEL0, &buf[len]);
|
|
len += ifxmips_port_read_procmem_helper("P1-ALT0", IFXMIPS_GPIO_P1_ALTSEL0, &buf[len]);
|
|
len += ifxmips_port_read_procmem_helper("P0-ALT1", IFXMIPS_GPIO_P0_ALTSEL1, &buf[len]);
|
|
len += ifxmips_port_read_procmem_helper("P1-ALT1", IFXMIPS_GPIO_P1_ALTSEL1, &buf[len]);
|
|
len = len + sprintf (buf + len, "\n\n");
|
|
|
|
*eof = 1;
|
|
|
|
return len;
|
|
}
|
|
|
|
static int
|
|
ifxmips_port_open (struct inode *inode, struct file *filep)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ifxmips_port_release (struct inode *inode, struct file *filelp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ifxmips_port_ioctl (struct inode *inode, struct file *filp,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
int ret = 0;
|
|
volatile struct ifxmips_port_ioctl_parm parm;
|
|
|
|
if (_IOC_TYPE (cmd) != IFXMIPS_PORT_IOC_MAGIC)
|
|
return -EINVAL;
|
|
|
|
if (_IOC_DIR (cmd) & _IOC_WRITE) {
|
|
if (!access_ok
|
|
(VERIFY_READ, arg,
|
|
sizeof (struct ifxmips_port_ioctl_parm)))
|
|
return -EFAULT;
|
|
ret = copy_from_user ((void *) &parm, (void *) arg,
|
|
sizeof (struct ifxmips_port_ioctl_parm));
|
|
}
|
|
if (_IOC_DIR (cmd) & _IOC_READ) {
|
|
if (!access_ok
|
|
(VERIFY_WRITE, arg,
|
|
sizeof (struct ifxmips_port_ioctl_parm)))
|
|
return -EFAULT;
|
|
}
|
|
|
|
if (down_trylock (&port_sem) != 0)
|
|
return -EBUSY;
|
|
|
|
switch (cmd) {
|
|
case IFXMIPS_PORT_IOCOD:
|
|
if (parm.value == 0x00)
|
|
ifxmips_port_clear_open_drain(parm.port, parm.pin);
|
|
else
|
|
ifxmips_port_set_open_drain(parm.port, parm.pin);
|
|
break;
|
|
|
|
case IFXMIPS_PORT_IOCPUDSEL:
|
|
if (parm.value == 0x00)
|
|
ifxmips_port_clear_pudsel(parm.port, parm.pin);
|
|
else
|
|
ifxmips_port_set_pudsel(parm.port, parm.pin);
|
|
break;
|
|
|
|
case IFXMIPS_PORT_IOCPUDEN:
|
|
if (parm.value == 0x00)
|
|
ifxmips_port_clear_puden(parm.port, parm.pin);
|
|
else
|
|
ifxmips_port_set_puden(parm.port, parm.pin);
|
|
break;
|
|
|
|
case IFXMIPS_PORT_IOCSTOFF:
|
|
if (parm.value == 0x00)
|
|
ifxmips_port_clear_stoff(parm.port, parm.pin);
|
|
else
|
|
ifxmips_port_set_stoff(parm.port, parm.pin);
|
|
break;
|
|
|
|
case IFXMIPS_PORT_IOCDIR:
|
|
if (parm.value == 0x00)
|
|
ifxmips_port_set_dir_in(parm.port, parm.pin);
|
|
else
|
|
ifxmips_port_set_dir_out(parm.port, parm.pin);
|
|
break;
|
|
|
|
case IFXMIPS_PORT_IOCOUTPUT:
|
|
if (parm.value == 0x00)
|
|
ifxmips_port_clear_output(parm.port, parm.pin);
|
|
else
|
|
ifxmips_port_set_output(parm.port, parm.pin);
|
|
break;
|
|
|
|
case IFXMIPS_PORT_IOCALTSEL0:
|
|
if (parm.value == 0x00)
|
|
ifxmips_port_clear_altsel0(parm.port, parm.pin);
|
|
else
|
|
ifxmips_port_set_altsel0(parm.port, parm.pin);
|
|
break;
|
|
|
|
case IFXMIPS_PORT_IOCALTSEL1:
|
|
if (parm.value == 0x00)
|
|
ifxmips_port_clear_altsel1(parm.port, parm.pin);
|
|
else
|
|
ifxmips_port_set_altsel1(parm.port, parm.pin);
|
|
break;
|
|
|
|
case IFXMIPS_PORT_IOCINPUT:
|
|
parm.value = ifxmips_port_get_input(parm.port, parm.pin);
|
|
copy_to_user((void*)arg, (void*)&parm,
|
|
sizeof(struct ifxmips_port_ioctl_parm));
|
|
break;
|
|
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
up (&port_sem);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct file_operations port_fops = {
|
|
.open = ifxmips_port_open,
|
|
.release = ifxmips_port_release,
|
|
.ioctl = ifxmips_port_ioctl
|
|
};
|
|
|
|
int __init
|
|
ifxmips_gpio_init (void)
|
|
{
|
|
int retval = 0;
|
|
|
|
sema_init (&port_sem, 1);
|
|
|
|
ifxmips_gpio_major = register_chrdev(0, "ifxmips_gpio", &port_fops);
|
|
if (!ifxmips_gpio_major)
|
|
{
|
|
printk("ifxmips-port: 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);
|
|
|
|
#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;
|
|
|
|
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("registered ifxmips gpio driver\n");
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
void __exit
|
|
ifxmips_gpio_exit (void)
|
|
{
|
|
#ifdef CONFIG_IFXMIPS_GPIO_RST_BTN
|
|
del_timer_sync(&rst_button_timer);
|
|
#endif
|
|
unregister_chrdev(ifxmips_gpio_major, "ifxmips_gpio");
|
|
remove_proc_entry("ifxmips_gpio", NULL);
|
|
}
|
|
|
|
module_init(ifxmips_gpio_init);
|
|
module_exit(ifxmips_gpio_exit);
|