mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-28 08:13:21 +02:00
cf5e9a49e8
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11406 3c298f89-4303-0410-b956-a3cf2f4a3e73
408 lines
10 KiB
C
408 lines
10 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 <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>
|
|
#include <asm/ifxmips/ifxmips_ioctl.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;
|
|
|
|
/* 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;
|
|
ifxmips_w32(ifxmips_r32(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;
|
|
ifxmips_w32(ifxmips_r32(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;
|
|
ifxmips_w32(ifxmips_r32(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;
|
|
ifxmips_w32(ifxmips_r32(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;
|
|
ifxmips_w32(ifxmips_r32(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;
|
|
ifxmips_w32(ifxmips_r32(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;
|
|
ifxmips_w32(ifxmips_r32(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;
|
|
ifxmips_w32(ifxmips_r32(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;
|
|
ifxmips_w32(ifxmips_r32(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;
|
|
ifxmips_w32(ifxmips_r32(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;
|
|
ifxmips_w32(ifxmips_r32(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;
|
|
ifxmips_w32(ifxmips_r32(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 (ifxmips_r32(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;
|
|
ifxmips_w32(ifxmips_r32(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;
|
|
ifxmips_w32(ifxmips_r32(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;
|
|
ifxmips_w32(ifxmips_r32(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;
|
|
ifxmips_w32(ifxmips_r32(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
|
|
|
|
static int
|
|
ifxmips_gpio_probe (struct platform_device *dev)
|
|
{
|
|
int retval = 0;
|
|
|
|
sema_init (&port_sem, 1);
|
|
|
|
#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(KERN_INFO DRVNAME ": device successfully initialized #%d.\n", ifxmips_gpio_major);
|
|
|
|
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);
|
|
|
|
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)
|
|
{
|
|
platform_driver_unregister(&ifxmips_gpio_driver);
|
|
}
|
|
|
|
module_init(ifxmips_gpio_init);
|
|
module_exit(ifxmips_gpio_exit);
|