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path: root/target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c
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Diffstat (limited to 'target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c')
-rw-r--r--target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c158
1 files changed, 68 insertions, 90 deletions
diff --git a/target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c b/target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c
index 8beb0b820..931d3ac1d 100644
--- a/target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c
+++ b/target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c
@@ -13,9 +13,10 @@
* 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) 2004 btxu Generate from INCA-IP project
+ * Copyright (C) 2005 Jin-Sze.Sow Comments edited
+ * Copyright (C) 2006 Huang Xiaogang Modification & verification on Danube chip
* Copyright (C) 2007 John Crispin <blogic@openwrt.org>
- *
*/
#include <linux/module.h>
@@ -43,10 +44,6 @@
#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
@@ -65,58 +62,51 @@ struct event_t {
};
#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_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_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_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));
-
+ 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_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));
-
+ 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_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));
-
+ 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);
@@ -125,97 +115,96 @@ 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));
-
+ 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_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));
-
+ 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_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));
-
+ 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_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));
-
+ 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_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));
-
+ 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_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));
-
+ 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_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));
-
+ 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_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));
-
+ 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_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));
-
+ 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_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
@@ -224,54 +213,56 @@ ifxmips_port_get_input (unsigned int port, unsigned int pin)
EXPORT_SYMBOL(ifxmips_port_get_input);
int
-ifxmips_port_set_altsel0 (unsigned int port, unsigned int pin)
+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));
-
+ 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_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));
-
+ 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_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));
-
+ 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_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));
-
+ 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)
+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)
+static void
+hotplug_button(struct work_struct *wq)
{
struct sk_buff *skb;
struct event_t *event;
@@ -280,21 +271,17 @@ static void hotplug_button(struct work_struct *wq)
char buf[128];
event = container_of(wq, struct event_t, wq);
- if (!uevent_sock)
+ 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)
+ 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");
@@ -307,12 +294,12 @@ static void hotplug_button(struct work_struct *wq)
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)
+static void
+reset_button_poll(unsigned long unused)
{
struct event_t *event;
@@ -325,7 +312,7 @@ static void reset_button_poll(unsigned long unused)
pressed = 0;
else
pressed = 1;
- printk("button was %s\n", (pressed ? "pressed" : "released"));
+ printk("reset button was %s\n", (pressed ? "pressed" : "released"));
event = (struct event_t *) kzalloc(sizeof(struct event_t), GFP_ATOMIC);
if (!event)
{
@@ -342,39 +329,30 @@ static void reset_button_poll(unsigned long unused)
#endif
static int
-ifxmips_gpio_probe (struct platform_device *dev)
+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)
+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;
}
@@ -383,22 +361,22 @@ platform_driver ifxmips_gpio_driver = {
.probe = ifxmips_gpio_probe,
.remove = ifxmips_gpio_remove,
.driver = {
- .name = DRVNAME,
+ .name = "ifxmips_gpio",
.owner = THIS_MODULE,
},
};
int __init
-ifxmips_gpio_init (void)
+ifxmips_gpio_init(void)
{
int ret = platform_driver_register(&ifxmips_gpio_driver);
if (ret)
- printk(KERN_INFO DRVNAME ": Error registering platfom driver!");
+ printk(KERN_INFO "ifxmips_gpio : Error registering platfom driver!");
return ret;
}
void __exit
-ifxmips_gpio_exit (void)
+ifxmips_gpio_exit(void)
{
platform_driver_unregister(&ifxmips_gpio_driver);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-07 08:00:47 +0000