2 files changed, 492 insertions, 0 deletions
diff --git a/target/linux/ar7-2.6/files/drivers/char/ar7_gpio.c b/target/linux/ar7-2.6/files/drivers/char/ar7_gpio.c
new file mode 100644
index 000000000..d8dc2e1ff
--- /dev/null
+++ b/target/linux/ar7-2.6/files/drivers/char/ar7_gpio.c
@@ -0,0 +1,160 @@
+/*
+ * linux/drivers/char/ar7_gpio.c
+ * 
+ * Copyright (C) 2007 OpenWrt.org
+ * 
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+#include <linux/types.h>
+#include <linux/cdev.h>
+
+#include <asm/gpio.h>
+
+#define DRVNAME "ar7_gpio"
+#define LONGNAME "TI AR7 GPIOs Driver"
+
+MODULE_AUTHOR("Nicolas Thill <nico@openwrt.org>");
+MODULE_DESCRIPTION(LONGNAME);
+MODULE_LICENSE("GPL");
+
+static int ar7_gpio_major = 0;
+
+static ssize_t ar7_gpio_write(struct file *file, const char __user *buf,
+	size_t len, loff_t *ppos)
+{
+	int pin = iminor(file->f_dentry->d_inode);
+	size_t i;
+
+	for (i = 0; i < len; ++i) {
+		char c;
+		if (get_user(c, buf + i))
+			return -EFAULT;
+		switch (c) {
+		case '0':
+			gpio_set_value(pin, 0);
+			break;
+		case '1':
+			gpio_set_value(pin, 1);
+			break;
+		case 'd':
+		case 'D':
+			ar7_gpio_disable(pin);
+			break;
+		case 'e':
+		case 'E':
+			ar7_gpio_enable(pin);
+			break;
+		case 'i':
+		case 'I':
+		case '<':
+			gpio_direction_input(pin);
+			break;
+		case 'o':
+		case 'O':
+		case '>':
+			gpio_direction_output(pin);
+			break;
+		default:
+			return -EINVAL;
+		}
+	}
+
+	return len;
+}
+
+static ssize_t ar7_gpio_read(struct file *file, char __user * buf,
+	size_t len, loff_t * ppos)
+{
+	int pin = iminor(file->f_dentry->d_inode);
+	int value;
+
+	value = gpio_get_value(pin);
+	if (put_user(value ? '1' : '0', buf))
+		return -EFAULT;
+
+	return 1;
+}
+
+static int ar7_gpio_open(struct inode *inode, struct file *file)
+{
+	int m = iminor(inode);
+
+	if (m >= AR7_GPIO_MAX)
+		return -EINVAL;
+
+	return nonseekable_open(inode, file);
+}
+
+static int ar7_gpio_release(struct inode *inode, struct file *file)
+{
+	return 0;
+}
+
+static const struct file_operations ar7_gpio_fops = {
+	.owner   = THIS_MODULE,
+	.write   = ar7_gpio_write,
+	.read    = ar7_gpio_read,
+	.open    = ar7_gpio_open,
+	.release = ar7_gpio_release,
+	.llseek  = no_llseek,
+};
+
+static struct platform_device *ar7_gpio_device;
+
+static int __init ar7_gpio_init(void)
+{
+	int rc;
+
+	ar7_gpio_device = platform_device_alloc(DRVNAME, -1);
+	if (!ar7_gpio_device)
+		return -ENOMEM;
+
+	rc = platform_device_add(ar7_gpio_device);
+	if (rc < 0)
+		goto out_put;
+
+	rc = register_chrdev(ar7_gpio_major, DRVNAME, &ar7_gpio_fops);
+	if (rc < 0)
+		goto out_put;
+
+	ar7_gpio_major = rc;
+
+	goto out;
+
+out_put:
+	platform_device_put(ar7_gpio_device);
+out:
+	return rc;
+}
+
+static void __exit ar7_gpio_exit(void)
+{
+	unregister_chrdev(ar7_gpio_major, DRVNAME);
+	platform_device_unregister(ar7_gpio_device);
+}
+
+module_init(ar7_gpio_init);
+module_exit(ar7_gpio_exit);
diff --git a/target/linux/ar7-2.6/files/drivers/char/watchdog/ar7_wdt.c b/target/linux/ar7-2.6/files/drivers/char/watchdog/ar7_wdt.c
new file mode 100644
index 000000000..00919e76e
--- /dev/null
+++ b/target/linux/ar7-2.6/files/drivers/char/watchdog/ar7_wdt.c
@@ -0,0 +1,332 @@
+/*
+ * linux/drivers/char/ar7_wdt.c
+ * 
+ * Copyright (C) 2007 OpenWrt.org
+ * Copyright (c) 2005 Enrik Berkhan <Enrik.Berkhan@akk.org>
+ *
+ * Some code taken from:
+ * National Semiconductor SCx200 Watchdog support
+ * Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/fs.h>
+#include <linux/ioport.h>
+
+#include <asm/addrspace.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#include <asm/ar7/ar7.h>
+
+#define DRVNAME "ar7_wdt"
+#define LONGNAME "TI AR7 Watchdog Timer"
+
+MODULE_AUTHOR("Nicolas Thill <nico@openwrt.org>");
+MODULE_DESCRIPTION(LONGNAME);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
+static int margin = 60;
+module_param(margin, int, 0);
+MODULE_PARM_DESC(margin, "Watchdog margin in seconds");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Disable watchdog shutdown on close");
+
+typedef struct {
+	u32 kick_lock;
+	u32 kick;
+	u32 change_lock;
+	u32 change ;
+	u32 disable_lock;
+	u32 disable;
+	u32 prescale_lock;
+	u32 prescale;
+} ar7_wdt_t;
+
+static struct semaphore open_semaphore;
+static unsigned expect_close;
+
+/* XXX correct? assumed to be sysfreq/2. get this dynamically ... */
+#define vbus_freq (ar7_bus_freq() / 2)
+
+/* XXX currently fixed, allows max margin ~68.72 secs */
+#define prescale_value 0xFFFF
+
+static void ar7_wdt_kick(u32 value)
+{
+	volatile ar7_wdt_t *ar7_wdt = (ar7_wdt_t *)ioremap(AR7_REGS_WDT, sizeof(ar7_wdt_t));
+
+	ar7_wdt->kick_lock = 0x5555;
+	if ((ar7_wdt->kick_lock & 3) == 1) {
+		ar7_wdt->kick_lock = 0xAAAA;
+		if ((ar7_wdt->kick_lock & 3) == 3) {
+			ar7_wdt->kick = value;
+			return;
+		}
+ 	}
+ 	printk(KERN_ERR DRVNAME ": failed to unlock WDT kick reg\n");
+}
+
+static void ar7_wdt_prescale(u32 value)
+{
+	volatile ar7_wdt_t *ar7_wdt = (ar7_wdt_t *)ioremap(AR7_REGS_WDT, sizeof(ar7_wdt_t));
+
+	ar7_wdt->prescale_lock = 0x5A5A;
+	if ((ar7_wdt->prescale_lock & 3) == 1) {
+		ar7_wdt->prescale_lock = 0xA5A5;
+		if ((ar7_wdt->prescale_lock & 3) == 3) {
+			ar7_wdt->prescale = value;
+			return;
+		}
+	}
+	printk(KERN_ERR DRVNAME ": failed to unlock WDT prescale reg\n");
+}
+
+static void ar7_wdt_change(u32 value)
+{
+	volatile ar7_wdt_t *ar7_wdt = (ar7_wdt_t *)ioremap(AR7_REGS_WDT, sizeof(ar7_wdt_t));
+
+	ar7_wdt->change_lock = 0x6666;
+	if ((ar7_wdt->change_lock & 3) == 1) {
+		ar7_wdt->change_lock = 0xBBBB;
+		if ((ar7_wdt->change_lock & 3) == 3) {
+			ar7_wdt->change = value;
+			return;
+		}
+	}
+	printk(KERN_ERR DRVNAME ": failed to unlock WDT change reg\n");
+}
+
+static void ar7_wdt_disable(u32 value)
+{
+	volatile ar7_wdt_t *ar7_wdt = (ar7_wdt_t *)ioremap(AR7_REGS_WDT, sizeof(ar7_wdt_t));
+
+	ar7_wdt->disable_lock = 0x7777;
+	if ((ar7_wdt->disable_lock & 3) == 1) {
+		ar7_wdt->disable_lock = 0xCCCC;
+		if ((ar7_wdt->disable_lock & 3) == 2) {
+			ar7_wdt->disable_lock = 0xDDDD; 
+			if ((ar7_wdt->disable_lock & 3) == 3) {
+				ar7_wdt->disable = value;
+				return;
+			}
+		}
+	}
+	printk(KERN_ERR DRVNAME ": failed to unlock WDT disable reg\n");
+}
+
+static void ar7_wdt_update_margin(int new_margin)
+{
+	u32 change;
+
+	change = new_margin * (vbus_freq / prescale_value);
+	if (change < 1) change = 1;
+	if (change > 0xFFFF) change = 0xFFFF;
+	ar7_wdt_change(change);
+	margin = change * prescale_value / vbus_freq;
+	printk(KERN_INFO DRVNAME
+	       ": timer margin %d seconds (prescale %d, change %d, freq %d)\n",
+	       margin, prescale_value, change, vbus_freq);
+}
+
+static void ar7_wdt_enable_wdt(void)
+{
+	printk(KERN_DEBUG DRVNAME ": enabling watchdog timer\n");
+	ar7_wdt_disable(1);
+	ar7_wdt_kick(1);
+}
+
+static void ar7_wdt_disable_wdt(void)
+{
+	printk(KERN_DEBUG DRVNAME ": disabling watchdog timer\n");
+	ar7_wdt_disable(0);
+}
+
+static int ar7_wdt_open(struct inode *inode, struct file *file)
+{
+	/* only allow one at a time */
+	if (down_trylock(&open_semaphore))
+		return -EBUSY;
+	ar7_wdt_enable_wdt();
+	expect_close = 0;
+
+	return 0;
+}
+
+static int ar7_wdt_release(struct inode *inode, struct file *file)
+{
+	if (!expect_close) {
+		printk(KERN_WARNING DRVNAME ": watchdog device closed unexpectedly, will not disable the watchdog timer\n");
+	} else if (!nowayout) {
+		ar7_wdt_disable_wdt();
+	}
+        up(&open_semaphore);
+
+	return 0;
+}
+
+static int ar7_wdt_notify_sys(struct notifier_block *this, 
+			      unsigned long code, void *unused)
+{
+	if (code == SYS_HALT || code == SYS_POWER_OFF)
+		if (!nowayout)
+			ar7_wdt_disable_wdt();
+
+        return NOTIFY_DONE;
+}
+
+static struct notifier_block ar7_wdt_notifier =
+{
+	.notifier_call = ar7_wdt_notify_sys
+};
+
+static ssize_t ar7_wdt_write(struct file *file, const char *data, 
+			     size_t len, loff_t *ppos)
+{
+	if (ppos != &file->f_pos)
+		return -ESPIPE;
+
+	/* check for a magic close character */
+	if (len) {
+		size_t i;
+
+		ar7_wdt_kick(1);
+
+		expect_close = 0;
+		for (i = 0; i < len; ++i) {
+			char c;
+			if (get_user(c, data+i))
+				return -EFAULT;
+			if (c == 'V')
+				expect_close = 1;
+		}
+
+	}
+	return len;
+}
+
+static int ar7_wdt_ioctl(struct inode *inode, struct file *file, 
+			 unsigned int cmd, unsigned long arg)
+{
+	static struct watchdog_info ident = {
+		.identity = LONGNAME,
+		.firmware_version = 1, 
+		.options = (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING),
+	};
+	int new_margin;
+	
+	switch (cmd) {
+	default:
+		return -ENOTTY;
+	case WDIOC_GETSUPPORT:
+		if(copy_to_user((struct watchdog_info *)arg, &ident, 
+				sizeof(ident)))
+			return -EFAULT;
+		return 0;
+	case WDIOC_GETSTATUS:
+	case WDIOC_GETBOOTSTATUS:
+		if (put_user(0, (int *)arg))
+			return -EFAULT;
+		return 0;
+	case WDIOC_KEEPALIVE:
+		ar7_wdt_kick(1);
+		return 0;
+	case WDIOC_SETTIMEOUT:
+		if (get_user(new_margin, (int *)arg))
+			return -EFAULT;
+		if (new_margin < 1)
+			return -EINVAL;
+
+		ar7_wdt_update_margin(new_margin);
+		ar7_wdt_kick(1);
+
+	case WDIOC_GETTIMEOUT:
+		if (put_user(margin, (int *)arg))
+			return -EFAULT;
+		return 0;
+	}
+}
+
+static struct file_operations ar7_wdt_fops = {
+	.owner	 = THIS_MODULE,
+	.write   = ar7_wdt_write,
+	.ioctl   = ar7_wdt_ioctl,
+	.open    = ar7_wdt_open,
+	.release = ar7_wdt_release,
+};
+
+static struct miscdevice ar7_wdt_miscdev = {
+	.minor = WATCHDOG_MINOR,
+	.name  = "watchdog",
+	.fops  = &ar7_wdt_fops,
+};
+
+static int __init ar7_wdt_init(void)
+{
+	int rc;
+
+	if (!request_mem_region(AR7_REGS_WDT, sizeof(ar7_wdt_t), LONGNAME)) {
+		printk(KERN_WARNING DRVNAME ": watchdog I/O region busy\n");
+		return -EBUSY;
+	}
+
+	ar7_wdt_disable_wdt();
+	ar7_wdt_prescale(prescale_value);
+	ar7_wdt_update_margin(margin);
+
+	sema_init(&open_semaphore, 1);
+
+	rc = misc_register(&ar7_wdt_miscdev);
+	if (rc) {
+                printk(KERN_ERR DRVNAME ": unable to register misc device\n");
+		goto out_alloc;
+	}
+
+	rc = register_reboot_notifier(&ar7_wdt_notifier);
+        if (rc) {
+                printk(KERN_ERR DRVNAME ": unable to register reboot notifier\n");
+		goto out_register;
+        }
+	goto out;
+
+out_register:
+	misc_deregister(&ar7_wdt_miscdev);
+out_alloc:
+	release_mem_region(AR7_REGS_WDT, sizeof(ar7_wdt_t));
+out:
+	return rc;
+}
+
+static void __exit ar7_wdt_cleanup(void)
+{
+        unregister_reboot_notifier(&ar7_wdt_notifier);
+	misc_deregister(&ar7_wdt_miscdev);
+	release_mem_region(AR7_REGS_WDT, sizeof(ar7_wdt_t));
+}
+
+module_init(ar7_wdt_init);
+module_exit(ar7_wdt_cleanup);