[rdc] use upstream MFD, GPIO patch, put everything in patches.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21219 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 315 insertions, 0 deletions

diff --git a/target/linux/rdc/patches-2.6.30/110-rdc321x_watchdog_fix.patch b/target/linux/rdc/patches-2.6.30/110-rdc321x_watchdog_fix.patch
new file mode 100644
index 000000000..3b1d8aa34
--- /dev/null
+++ b/target/linux/rdc/patches-2.6.30/110-rdc321x_watchdog_fix.patch
@@ -0,0 +1,315 @@
+Index: linux-2.6.30.10/drivers/watchdog/rdc321x_wdt.c
+===================================================================
+--- linux-2.6.30.10.orig/drivers/watchdog/rdc321x_wdt.c	2010-04-28 11:11:44.000000000 +0200
++++ linux-2.6.30.10/drivers/watchdog/rdc321x_wdt.c	2010-04-28 11:20:51.000000000 +0200
+@@ -36,111 +36,99 @@
+ #include <linux/watchdog.h>
+ #include <linux/io.h>
+ #include <linux/uaccess.h>
++#include <linux/pci.h>
++#include <linux/delay.h>
+ #include <linux/mfd/rdc321x.h>
+ 
+-#define RDC_WDT_MASK	0x80000000 /* Mask */
++#define RDC321X_WDT_REG 0x00000044
++
+ #define RDC_WDT_EN	0x00800000 /* Enable bit */
+-#define RDC_WDT_WTI	0x00200000 /* Generate CPU reset/NMI/WDT on timeout */
+-#define RDC_WDT_RST	0x00100000 /* Reset bit */
+-#define RDC_WDT_WIF	0x00040000 /* WDT IRQ Flag */
+-#define RDC_WDT_IRT	0x00000100 /* IRQ Routing table */
+-#define RDC_WDT_CNT	0x00000001 /* WDT count */
++#define RDC_WDT_WDTIRQ	0x00400000 /* Create WDT IRQ before CPU reset */
++#define RDC_WDT_NMIIRQ	0x00200000 /* Create NMI IRQ before CPU reset */
++#define RDC_WDT_RST	0x00100000 /* Reset wdt */
++#define RDC_WDT_NIF	0x00080000 /* NMI interrupt occured */
++#define RDC_WDT_WIF	0x00040000 /* WDT interrupt occured */
++#define RDC_WDT_IRT	0x00000700 /* IRQ Routing table */
++#define RDC_WDT_CNT	0x0000007F /* WDT count */
+ 
+-#define RDC_CLS_TMR	0x80003844 /* Clear timer */
++/* default counter value (2.34 s) */
++#define RDC_WDT_DFLT_CNT 0x00000040
+ 
+-#define RDC_WDT_INTERVAL	(HZ/10+1)
++#define RDC_WDT_SETUP (RDC_WDT_EN | RDC_WDT_NMIIRQ | RDC_WDT_RST | RDC_WDT_DFLT_CNT)
+ 
+ static int ticks = 1000;
+ 
+ /* some device data */
+ 
+ static struct {
+-	struct completion stop;
+-	int running;
+ 	struct timer_list timer;
+-	int queue;
+-	int default_ticks;
+-	unsigned long inuse;
+-	spinlock_t lock;
++	int seconds_left;
++	int total_seconds;
++	bool inuse;
++	bool running;
++	bool close_expected;
++
+ 	struct pci_dev *sb_pdev;
+ 	int base_reg;
+ } rdc321x_wdt_device;
+ 
+-/* generic helper functions */
++static struct watchdog_info ident = {
++	.options = WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
++	.identity = "RDC321x WDT",
++};
++
+ 
+-static void rdc321x_wdt_trigger(unsigned long unused)
++/* generic helper functions */
++static void rdc321x_wdt_timer(unsigned long unused)
+ {
+-	unsigned long flags;
+-	u32 val;
++        if (!rdc321x_wdt_device.running) {
++                pci_write_config_dword(rdc321x_wdt_device.sb_pdev,
++						rdc321x_wdt_device.base_reg, 0);
++                return;
++        }
+ 
+-	if (rdc321x_wdt_device.running)
+-		ticks--;
++        rdc321x_wdt_device.seconds_left--;
+ 
+-	/* keep watchdog alive */
+-	spin_lock_irqsave(&rdc321x_wdt_device.lock, flags);
+-	pci_read_config_dword(rdc321x_wdt_device.sb_pdev,
+-					rdc321x_wdt_device.base_reg, &val);
+-	val |= RDC_WDT_EN;
+-	pci_write_config_dword(rdc321x_wdt_device.sb_pdev,
+-					rdc321x_wdt_device.base_reg, val);
+-	spin_unlock_irqrestore(&rdc321x_wdt_device.lock, flags);
++        if (rdc321x_wdt_device.seconds_left < 1)
++                return;
+ 
+-	/* requeue?? */
+-	if (rdc321x_wdt_device.queue && ticks)
+-		mod_timer(&rdc321x_wdt_device.timer,
+-				jiffies + RDC_WDT_INTERVAL);
+-	else {
+-		/* ticks doesn't matter anyway */
+-		complete(&rdc321x_wdt_device.stop);
+-	}
++	pci_write_config_dword(rdc321x_wdt_device.sb_pdev,
++				rdc321x_wdt_device.base_reg, RDC_WDT_SETUP);
+ 
++        mod_timer(&rdc321x_wdt_device.timer, HZ * 2 + jiffies);
+ }
+ 
+ static void rdc321x_wdt_reset(void)
+ {
+-	ticks = rdc321x_wdt_device.default_ticks;
++	rdc321x_wdt_device.seconds_left = rdc321x_wdt_device.total_seconds;
+ }
+ 
+ static void rdc321x_wdt_start(void)
+ {
+-	unsigned long flags;
+-
+-	if (!rdc321x_wdt_device.queue) {
+-		rdc321x_wdt_device.queue = 1;
+-
+-		/* Clear the timer */
+-		spin_lock_irqsave(&rdc321x_wdt_device.lock, flags);
+-		pci_write_config_dword(rdc321x_wdt_device.sb_pdev,
+-				rdc321x_wdt_device.base_reg, RDC_CLS_TMR);
+-
+-		/* Enable watchdog and set the timeout to 81.92 us */
+-		pci_write_config_dword(rdc321x_wdt_device.sb_pdev,
+-					rdc321x_wdt_device.base_reg,
+-					RDC_WDT_EN | RDC_WDT_CNT);
+-		spin_unlock_irqrestore(&rdc321x_wdt_device.lock, flags);
++	if (rdc321x_wdt_device.running)
++		return;
+ 
+-		mod_timer(&rdc321x_wdt_device.timer,
+-				jiffies + RDC_WDT_INTERVAL);
+-	}
++	rdc321x_wdt_device.seconds_left = rdc321x_wdt_device.total_seconds;
++	rdc321x_wdt_device.running = true;
++	rdc321x_wdt_timer(0);
+ 
+-	/* if process dies, counter is not decremented */
+-	rdc321x_wdt_device.running++;
++	return;
+ }
+ 
+ static int rdc321x_wdt_stop(void)
+ {
+-	if (rdc321x_wdt_device.running)
+-		rdc321x_wdt_device.running = 0;
++	if (WATCHDOG_NOWAYOUT)
++		return -ENOSYS;
+ 
+-	ticks = rdc321x_wdt_device.default_ticks;
++	rdc321x_wdt_device.running = false;
+ 
+-	return -EIO;
++	return 0;
+ }
+ 
+ /* filesystem operations */
+ static int rdc321x_wdt_open(struct inode *inode, struct file *file)
+ {
+-	if (test_and_set_bit(0, &rdc321x_wdt_device.inuse))
++	if (xchg(&rdc321x_wdt_device.inuse, true))
+ 		return -EBUSY;
+ 
+ 	return nonseekable_open(inode, file);
+@@ -148,7 +136,16 @@
+ 
+ static int rdc321x_wdt_release(struct inode *inode, struct file *file)
+ {
+-	clear_bit(0, &rdc321x_wdt_device.inuse);
++	int ret;
++
++	if (rdc321x_wdt_device.close_expected) {
++		ret = rdc321x_wdt_stop();
++		if (ret)
++			return ret;
++	}
++
++	rdc321x_wdt_device.inuse = false;
++
+ 	return 0;
+ }
+ 
+@@ -156,30 +153,29 @@
+ 				unsigned long arg)
+ {
+ 	void __user *argp = (void __user *)arg;
+-	u32 value;
+-	static struct watchdog_info ident = {
+-		.options = WDIOF_CARDRESET,
+-		.identity = "RDC321x WDT",
+-	};
+-	unsigned long flags;
++	int value;
+ 
+ 	switch (cmd) {
+ 	case WDIOC_KEEPALIVE:
+ 		rdc321x_wdt_reset();
+ 		break;
+-	case WDIOC_GETSTATUS:
+-		/* Read the value from the DATA register */
+-		spin_lock_irqsave(&rdc321x_wdt_device.lock, flags);
+-		pci_read_config_dword(rdc321x_wdt_device.sb_pdev,
+-					rdc321x_wdt_device.base_reg, &value);
+-		spin_unlock_irqrestore(&rdc321x_wdt_device.lock, flags);
+-		if (copy_to_user(argp, &value, sizeof(u32)))
+-			return -EFAULT;
+-		break;
+ 	case WDIOC_GETSUPPORT:
+ 		if (copy_to_user(argp, &ident, sizeof(ident)))
+ 			return -EFAULT;
+ 		break;
++	case WDIOC_SETTIMEOUT:
++		if (copy_from_user(&rdc321x_wdt_device.total_seconds, argp, sizeof(int)))
++			return -EFAULT;
++		rdc321x_wdt_device.seconds_left = rdc321x_wdt_device.total_seconds;
++		break;
++	case WDIOC_GETTIMEOUT:
++		if (copy_to_user(argp, &rdc321x_wdt_device.total_seconds, sizeof(int)))
++			return -EFAULT;
++		break;
++	case WDIOC_GETTIMELEFT:
++		if (copy_to_user(argp, &rdc321x_wdt_device.seconds_left, sizeof(int)))
++			return -EFAULT;
++		break;
+ 	case WDIOC_SETOPTIONS:
+ 		if (copy_from_user(&value, argp, sizeof(int)))
+ 			return -EFAULT;
+@@ -194,17 +190,34 @@
+ 		}
+ 		break;
+ 	default:
+-		return -ENOTTY;
++		return -EINVAL;
+ 	}
++
+ 	return 0;
+ }
+ 
+ static ssize_t rdc321x_wdt_write(struct file *file, const char __user *buf,
+ 				size_t count, loff_t *ppos)
+ {
++	size_t i;
++
+ 	if (!count)
+ 		return -EIO;
+ 
++	rdc321x_wdt_device.close_expected = false;
++
++	for (i = 0; i != count; i++) {
++		char c;
++
++		if (get_user(c, buf + i))
++			return -EFAULT;
++
++		if (c == 'V') {
++			rdc321x_wdt_device.close_expected = true;
++			break;
++		}
++	}
++
+ 	rdc321x_wdt_reset();
+ 
+ 	return count;
+@@ -246,27 +259,18 @@
+ 	rdc321x_wdt_device.sb_pdev = pdata->sb_pdev;
+ 	rdc321x_wdt_device.base_reg = r->start;
+ 
++	rdc321x_wdt_device.running = false;
++	rdc321x_wdt_device.close_expected = false;
++	rdc321x_wdt_device.inuse = 0;
++	setup_timer(&rdc321x_wdt_device.timer, rdc321x_wdt_timer, 0);
++	rdc321x_wdt_device.total_seconds = 100;
++
+ 	err = misc_register(&rdc321x_wdt_misc);
+ 	if (err < 0) {
+ 		dev_err(&pdev->dev, "misc_register failed\n");
+ 		return err;
+ 	}
+ 
+-	spin_lock_init(&rdc321x_wdt_device.lock);
+-
+-	/* Reset the watchdog */
+-	pci_write_config_dword(rdc321x_wdt_device.sb_pdev,
+-				rdc321x_wdt_device.base_reg, RDC_WDT_RST);
+-
+-	init_completion(&rdc321x_wdt_device.stop);
+-	rdc321x_wdt_device.queue = 0;
+-
+-	clear_bit(0, &rdc321x_wdt_device.inuse);
+-
+-	setup_timer(&rdc321x_wdt_device.timer, rdc321x_wdt_trigger, 0);
+-
+-	rdc321x_wdt_device.default_ticks = ticks;
+-
+ 	dev_info(&pdev->dev, "watchdog init success\n");
+ 
+ 	return 0;
+@@ -274,10 +278,11 @@
+ 
+ static int rdc321x_wdt_remove(struct platform_device *pdev)
+ {
+-	if (rdc321x_wdt_device.queue) {
+-		rdc321x_wdt_device.queue = 0;
+-		wait_for_completion(&rdc321x_wdt_device.stop);
+-	}
++	if (rdc321x_wdt_device.inuse)
++		rdc321x_wdt_device.inuse = 0;
++
++	while (timer_pending(&rdc321x_wdt_device.timer))
++		msleep(100);
+ 
+ 	misc_deregister(&rdc321x_wdt_misc);
+