bump ifxmips to 2.6.25.1

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11071 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 325 insertions, 0 deletions

diff --git a/target/linux/ifxmips/files/drivers/watchdog/ifxmips_wdt.c b/target/linux/ifxmips/files/drivers/watchdog/ifxmips_wdt.c
new file mode 100644
index 000000000..d631f4aac
--- /dev/null
+++ b/target/linux/ifxmips/files/drivers/watchdog/ifxmips_wdt.c
@@ -0,0 +1,325 @@
+/*
+ *   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) 2006 infineon
+ *   Copyright (C) 2007 John Crispin <blogic@openwrt.org> 
+ *
+ */
+
+#include <asm/uaccess.h>
+#include <linux/errno.h>
+#include <linux/proc_fs.h>
+#include <linux/ioctl.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/watchdog.h>
+#include <linux/miscdevice.h>
+#include <asm-mips/ifxmips/ifxmips_wdt.h>
+#include <asm-mips/ifxmips/ifxmips.h>
+
+#define DRVNAME			"ifxmips_wdt"
+
+// TODO remove magic numbers and weirdo macros
+extern unsigned int ifxmips_get_fpi_hz (void);
+
+static int ifxmips_wdt_inuse = 0;
+static int ifxmips_wdt_major = 0;
+
+int
+ifxmips_wdt_enable (unsigned int timeout)
+{
+	unsigned int wdt_cr = 0;
+	unsigned int wdt_reload = 0;
+	unsigned int wdt_clkdiv, wdt_pwl, ffpi;
+	int retval = 0;
+
+	/* clock divider & prewarning limit */
+	wdt_clkdiv = 1 << (7 * IFXMIPS_BIU_WDT_CR_CLKDIV_GET(readl(IFXMIPS_BIU_WDT_CR)));
+	wdt_pwl = 0x8000 >> IFXMIPS_BIU_WDT_CR_PWL_GET(readl(IFXMIPS_BIU_WDT_CR));
+
+	//TODO
+	printk("WARNING FUNCTION CALL MISSING!!!");
+	//ffpi = cgu_get_io_region_clock();
+	printk("cpu clock = %d\n", ffpi);
+
+	/* caculate reload value */
+	wdt_reload = (timeout * (ffpi / wdt_clkdiv)) + wdt_pwl;
+
+	printk(KERN_WARNING DRVNAME ": wdt_pwl=0x%x, wdt_clkdiv=%d, ffpi=%d, wdt_reload = 0x%x\n",
+		wdt_pwl, wdt_clkdiv, ffpi, wdt_reload);
+
+	if (wdt_reload > 0xFFFF)
+	{
+		printk(KERN_WARNING DRVNAME ": timeout too large %d\n", timeout);
+		retval = -EINVAL;
+		goto out;
+	}
+
+	/* Write first part of password access */
+	writel(IFXMIPS_BIU_WDT_CR_PW_SET(IFXMIPS_WDT_PW1), IFXMIPS_BIU_WDT_CR);
+
+	wdt_cr = readl(IFXMIPS_BIU_WDT_CR);
+	wdt_cr &= (!IFXMIPS_BIU_WDT_CR_PW_SET(0xff) &
+		   !IFXMIPS_BIU_WDT_CR_PWL_SET(0x3) &
+		   !IFXMIPS_BIU_WDT_CR_CLKDIV_SET(0x3) &
+		   !IFXMIPS_BIU_WDT_CR_RELOAD_SET(0xffff));
+
+	wdt_cr |= (IFXMIPS_BIU_WDT_CR_PW_SET(IFXMIPS_WDT_PW2) |
+		   IFXMIPS_BIU_WDT_CR_PWL_SET(IFXMIPS_BIU_WDT_CR_PWL_GET(readl(IFXMIPS_BIU_WDT_CR))) |
+		   IFXMIPS_BIU_WDT_CR_CLKDIV_SET(IFXMIPS_BIU_WDT_CR_CLKDIV_GET(readl(IFXMIPS_BIU_WDT_CR))) |
+		   IFXMIPS_BIU_WDT_CR_RELOAD_SET(wdt_reload) |
+		   IFXMIPS_BIU_WDT_CR_GEN);
+
+	writel(wdt_cr, IFXMIPS_BIU_WDT_CR);
+
+	printk("watchdog enabled\n");
+
+out:
+	return retval;
+}
+
+void
+ifxmips_wdt_disable (void)
+{
+	writel(IFXMIPS_BIU_WDT_CR_PW_SET(IFXMIPS_WDT_PW1), IFXMIPS_BIU_WDT_CR);
+	writel(IFXMIPS_BIU_WDT_CR_PW_SET(IFXMIPS_WDT_PW2), IFXMIPS_BIU_WDT_CR);
+
+	printk("watchdog disabled\n");
+}
+
+/* passed LPEN or DSEN */
+void
+ifxmips_wdt_enable_feature (int en, int type)
+{
+	unsigned int wdt_cr = 0;
+
+	writel(IFXMIPS_BIU_WDT_CR_PW_SET(IFXMIPS_WDT_PW1), IFXMIPS_BIU_WDT_CR);
+
+	wdt_cr = readl(IFXMIPS_BIU_WDT_CR);
+
+	if (en)
+	{
+		wdt_cr &= (~IFXMIPS_BIU_WDT_CR_PW_SET(0xff));
+		wdt_cr |= (IFXMIPS_BIU_WDT_CR_PW_SET(IFXMIPS_WDT_PW2) | type);
+	} else {
+		wdt_cr &= (~IFXMIPS_BIU_WDT_CR_PW_SET(0xff) & ~type);
+		wdt_cr |= IFXMIPS_BIU_WDT_CR_PW_SET(IFXMIPS_WDT_PW2);
+	}
+
+	writel(wdt_cr, IFXMIPS_BIU_WDT_CR);
+}
+
+void
+ifxmips_wdt_prewarning_limit (int pwl)
+{
+	unsigned int wdt_cr = 0;
+
+	wdt_cr = readl(IFXMIPS_BIU_WDT_CR);
+	writel(IFXMIPS_BIU_WDT_CR_PW_SET(IFXMIPS_WDT_PW1), IFXMIPS_BIU_WDT_CR);
+
+	wdt_cr &= 0xf300ffff;
+	wdt_cr |= (IFXMIPS_BIU_WDT_CR_PW_SET(IFXMIPS_WDT_PW2) | IFXMIPS_BIU_WDT_CR_PWL_SET(pwl));
+
+	/* Set reload value in second password access */
+	writel(wdt_cr, IFXMIPS_BIU_WDT_CR);
+}
+
+void
+ifxmips_wdt_set_clkdiv (int clkdiv)
+{
+	unsigned int wdt_cr = 0;
+
+	wdt_cr = readl(IFXMIPS_BIU_WDT_CR);
+	writel(IFXMIPS_BIU_WDT_CR_PW_SET(IFXMIPS_WDT_PW1), IFXMIPS_BIU_WDT_CR);
+
+	wdt_cr &= 0xfc00ffff;
+	wdt_cr |= (IFXMIPS_BIU_WDT_CR_PW_SET(IFXMIPS_WDT_PW2) | IFXMIPS_BIU_WDT_CR_CLKDIV_SET(clkdiv));
+
+	/* Set reload value in second password access */
+	writel(wdt_cr, IFXMIPS_BIU_WDT_CR);
+}
+
+static int
+ifxmips_wdt_ioctl (struct inode *inode, struct file *file, unsigned int cmd,
+	   unsigned long arg)
+{
+	int result = 0;
+	static int timeout = -1;
+	unsigned int user_arg;
+
+	if ((cmd != IFXMIPS_WDT_IOC_STOP) && (cmd != IFXMIPS_WDT_IOC_PING) && (cmd != IFXMIPS_WDT_IOC_GET_STATUS))
+	{
+		if (copy_from_user((void *) &user_arg, (void *) arg, sizeof (int))){
+			result = -EINVAL;
+			goto out;
+		}
+	}
+
+	switch (cmd)
+	{
+	case IFXMIPS_WDT_IOC_START:
+		if ((result = ifxmips_wdt_enable(user_arg)) < 0)
+			timeout = -1;
+		else
+			timeout = user_arg;
+		break;
+
+	case IFXMIPS_WDT_IOC_STOP:
+		printk(KERN_INFO DRVNAME ": disable watch dog timer\n");
+		ifxmips_wdt_disable();
+		break;
+
+	case IFXMIPS_WDT_IOC_PING:
+		if (timeout < 0)
+			result = -EIO;
+		else
+			result = ifxmips_wdt_enable(timeout);
+		break;
+
+	case IFXMIPS_WDT_IOC_GET_STATUS:
+		user_arg = readl(IFXMIPS_BIU_WDT_SR);
+		copy_to_user((int*)arg, (int*)&user_arg, sizeof(int));
+		break;
+
+	case IFXMIPS_WDT_IOC_SET_PWL:
+		ifxmips_wdt_prewarning_limit(user_arg);
+		break;
+
+	case IFXMIPS_WDT_IOC_SET_DSEN:
+		ifxmips_wdt_enable_feature(user_arg, IFXMIPS_BIU_WDT_CR_DSEN);
+		break;
+
+	case IFXMIPS_WDT_IOC_SET_LPEN:
+		ifxmips_wdt_enable_feature(user_arg, IFXMIPS_BIU_WDT_CR_LPEN);
+		break;
+
+	case IFXMIPS_WDT_IOC_SET_CLKDIV:
+		ifxmips_wdt_set_clkdiv(user_arg);
+		break;
+
+	default:
+		printk(KERN_WARNING DRVNAME ": unknown watchdog iotcl\n");
+	}
+
+out:
+	return result;
+}
+
+static int
+ifxmips_wdt_open (struct inode *inode, struct file *file)
+{
+	if (ifxmips_wdt_inuse)
+		return -EBUSY;
+
+	ifxmips_wdt_inuse = 1;
+
+	return 0;
+}
+
+static int
+ifxmips_wdt_release (struct inode *inode, struct file *file)
+{
+	ifxmips_wdt_inuse = 0;
+
+	return 0;
+}
+
+int
+ifxmips_wdt_register_proc_read (char *buf, char **start, off_t offset, int count,
+			int *eof, void *data)
+{
+	int len = 0;
+
+	len += sprintf (buf + len, "IFXMIPS_BIU_WDT_PROC_READ\n");
+	len += sprintf (buf + len, "IFXMIPS_BIU_WDT_CR(0x%08x)	: 0x%08x\n",
+			(unsigned int)IFXMIPS_BIU_WDT_CR, readl(IFXMIPS_BIU_WDT_CR));
+	len += sprintf (buf + len, "IFXMIPS_BIU_WDT_SR(0x%08x)	: 0x%08x\n",
+			(unsigned int)IFXMIPS_BIU_WDT_SR, readl(IFXMIPS_BIU_WDT_SR));
+
+	*eof = 1;
+
+	return len;
+}
+
+static const struct file_operations ifxmips_wdt_fops = {
+	.owner		= THIS_MODULE,
+	.llseek		= no_llseek,
+	.ioctl		= ifxmips_wdt_ioctl,
+	.open		= ifxmips_wdt_open,
+	.release	= ifxmips_wdt_release,
+//	.write		= at91_wdt_write,
+};
+
+static struct miscdevice ifxmips_wdt_miscdev = {
+	.minor		= WATCHDOG_MINOR,
+	.name		= "ifxmips_wdt",
+	.fops		= &ifxmips_wdt_fops,
+};
+
+
+static int
+ifxmips_wdt_probe (struct platform_device *pdev)
+{
+	int ret = misc_register(&ifxmips_wdt_miscdev);
+	if (ret)
+		return ret;
+
+	create_proc_read_entry(DRVNAME, 0, NULL, ifxmips_wdt_register_proc_read, NULL);
+
+	printk(KERN_INFO DRVNAME ": ifxmips watchdog loaded\n");
+
+	return 0;
+}
+
+static int
+ifxmips_wdt_remove (struct platform_device *pdev)
+{
+	misc_deregister(&ifxmips_wdt_miscdev);
+	remove_proc_entry(DRVNAME, NULL);
+	return 0;
+}
+
+static struct
+platform_driver ifxmips_wdt_driver = {
+	.probe = ifxmips_wdt_probe,
+	.remove = ifxmips_wdt_remove,
+	.driver = {
+		.name = DRVNAME,
+		.owner = THIS_MODULE,
+	},
+};
+
+int __init
+ifxmips_wdt_init_module (void)
+{
+	int ret = platform_driver_register(&ifxmips_wdt_driver);
+	if (ret)
+		printk(KERN_INFO DRVNAME ": Error registering platfom driver!");
+	return ret;
+}
+
+void
+ifxmips_wdt_cleanup_module (void)
+{
+	platform_driver_unregister(&ifxmips_wdt_driver);
+}
+
+module_init(ifxmips_wdt_init_module);
+module_exit(ifxmips_wdt_cleanup_module);
+
+MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
+MODULE_DESCRIPTION("Watchdog driver for infineon ifxmips family");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);