[ppc44x] refresh kernel patches

[openwrt.git] / target / linux / ifxmips / files / drivers / char / ifxmips_gpio.c

diff --git a/target/linux/ifxmips/files/drivers/char/ifxmips_gpio.c b/target/linux/ifxmips/files/drivers/char/ifxmips_gpio.c
index 6ac9ec6..8802523 100644 (file)
--- a/target/linux/ifxmips/files/drivers/char/ifxmips_gpio.c
+++ b/target/linux/ifxmips/files/drivers/char/ifxmips_gpio.c
@@ -24,6 +24,17 @@
 #include <linux/proc_fs.h>
 #include <linux/init.h>
 #include <linux/ioctl.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/semaphore.h>
 #include <asm/uaccess.h>
 #include <asm/ifxmips/ifxmips.h>


@@ -32,8 +43,28 @@
 #define MAX_PORTS                      2
 #define PINS_PER_PORT          16
 
 #define MAX_PORTS                      2
 #define PINS_PER_PORT          16
 

+#define DRVNAME                                "ifxmips_gpio"  
+

 static unsigned int ifxmips_gpio_major = 0;
 
 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 need this ? */
 static struct semaphore port_sem;
 


@@ -64,7 +95,7 @@ int
 ifxmips_port_set_open_drain (unsigned int port, unsigned int pin)
 {
        IFXMIPS_GPIO_SANITY;
 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;
 }
 
        return 0;
 }


@@ -74,7 +105,7 @@ int
 ifxmips_port_clear_open_drain (unsigned int port, unsigned int pin)
 {
        IFXMIPS_GPIO_SANITY;
 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;
 }
 
        return 0;
 }


@@ -84,7 +115,7 @@ int
 ifxmips_port_set_pudsel (unsigned int port, unsigned int pin)
 {
     IFXMIPS_GPIO_SANITY;
 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;
 }
 
        return 0;
 }


@@ -94,7 +125,7 @@ int
 ifxmips_port_clear_pudsel (unsigned int port, unsigned int pin)
 {
     IFXMIPS_GPIO_SANITY;
 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;
 }
 
        return 0;
 }


@@ -104,7 +135,7 @@ int
 ifxmips_port_set_puden (unsigned int port, unsigned int pin)
 {
     IFXMIPS_GPIO_SANITY;
 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;
 }
 
        return 0;
 }


@@ -114,7 +145,7 @@ int
 ifxmips_port_clear_puden (unsigned int port, unsigned int pin)
 {
     IFXMIPS_GPIO_SANITY;
 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;
 }
 
        return 0;
 }


@@ -124,7 +155,7 @@ int
 ifxmips_port_set_stoff (unsigned int port, unsigned int pin)
 {
     IFXMIPS_GPIO_SANITY;
 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;
 }
 
        return 0;
 }


@@ -134,7 +165,7 @@ int
 ifxmips_port_clear_stoff (unsigned int port, unsigned int pin)
 {
     IFXMIPS_GPIO_SANITY;
 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;
 }
 
        return 0;
 }


@@ -144,7 +175,7 @@ int
 ifxmips_port_set_dir_out (unsigned int port, unsigned int pin)
 {
     IFXMIPS_GPIO_SANITY;
 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;
 }
 
        return 0;
 }


@@ -154,7 +185,7 @@ int
 ifxmips_port_set_dir_in (unsigned int port, unsigned int pin)
 {
     IFXMIPS_GPIO_SANITY;
 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;
 }
 
        return 0;
 }


@@ -164,7 +195,7 @@ int
 ifxmips_port_set_output (unsigned int port, unsigned int pin)
 {
     IFXMIPS_GPIO_SANITY;
 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;
 }
 
        return 0;
 }


@@ -174,7 +205,7 @@ int
 ifxmips_port_clear_output (unsigned int port, unsigned int pin)
 {
     IFXMIPS_GPIO_SANITY;
 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;
 }
 
        return 0;
 }


@@ -185,7 +216,7 @@ ifxmips_port_get_input (unsigned int port, unsigned int pin)
 {
     IFXMIPS_GPIO_SANITY;
 
 {
     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;
                return 0;
        else
                return 1;


@@ -196,7 +227,7 @@ int
 ifxmips_port_set_altsel0 (unsigned int port, unsigned int pin)
 {
     IFXMIPS_GPIO_SANITY;
 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;
 }
 
        return 0;
 }


@@ -206,7 +237,7 @@ int
 ifxmips_port_clear_altsel0 (unsigned int port, unsigned int pin)
 {
     IFXMIPS_GPIO_SANITY;
 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;
 }
 
        return 0;
 }


@@ -216,7 +247,7 @@ int
 ifxmips_port_set_altsel1 (unsigned int port, unsigned int pin)
 {
     IFXMIPS_GPIO_SANITY;
 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;
 }
 
        return 0;
 }


@@ -226,12 +257,90 @@ int
 ifxmips_port_clear_altsel1 (unsigned int port, unsigned int pin)
 {
     IFXMIPS_GPIO_SANITY;
 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);
 
 
        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;
 long ifxmips_port_read_procmem_helper(char* tag, u32* in_reg, char *buf)
 {
        u32 reg, bit = 0;


@@ -407,35 +516,78 @@ static struct file_operations port_fops = {
       .ioctl = ifxmips_port_ioctl
 };
 
       .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);
 
 {
        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)
        {
        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;
        }
 
                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;
 }
 
 
 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)
 {
 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);
 }
 
 module_init(ifxmips_gpio_init);