mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-09 17:30:38 +02:00
418 lines
11 KiB
Diff
418 lines
11 KiB
Diff
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diff -Nur linux-2.4.29/drivers/char/Config.in linux-2.4.29_geode/drivers/char/Config.in
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--- linux-2.4.29/drivers/char/Config.in Sun Aug 8 01:26:04 2004
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+++ linux-2.4.29_geode/drivers/char/Config.in Tue Feb 15 23:41:54 2005
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@@ -270,6 +270,7 @@
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fi
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fi
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tristate ' ZF MachZ Watchdog' CONFIG_MACHZ_WDT
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+ tristate ' Embedded NatSemi SC1x00 Watchdog' CONFIG_WD1100
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if [ "$CONFIG_SGI_IP22" = "y" ]; then
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dep_tristate ' Indy/I2 Hardware Watchdog' CONFIG_INDYDOG $CONFIG_SGI_IP22
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fi
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diff -Nur linux-2.4.29/drivers/char/Makefile linux-2.4.29_geode/drivers/char/Makefile
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--- linux-2.4.29/drivers/char/Makefile Sun Aug 8 01:26:04 2004
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+++ linux-2.4.29_geode/drivers/char/Makefile Tue Feb 15 23:41:54 2005
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@@ -302,6 +302,7 @@
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obj-$(CONFIG_ACQUIRE_WDT) += acquirewdt.o
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obj-$(CONFIG_ADVANTECH_WDT) += advantechwdt.o
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obj-$(CONFIG_IB700_WDT) += ib700wdt.o
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+obj-$(CONFIG_WD1100) += wd1100.o
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obj-$(CONFIG_MIXCOMWD) += mixcomwd.o
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obj-$(CONFIG_60XX_WDT) += sbc60xxwdt.o
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obj-$(CONFIG_W83877F_WDT) += w83877f_wdt.o
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diff -Nur linux-2.4.29/drivers/char/wd1100.c linux-2.4.29_geode/drivers/char/wd1100.c
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--- linux-2.4.29/drivers/char/wd1100.c Thu Jan 1 01:00:00 1970
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+++ linux-2.4.29_geode/drivers/char/wd1100.c Tue Feb 15 23:41:54 2005
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@@ -0,0 +1,391 @@
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+/*
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+ * National Semiconductor SC1x00 CPU watchdog driver
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+ * Copyright (c) Inprimis Technologies 2002
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+ *
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+ * by Mark Grosberg <markg@inprimis.com>
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+ * and Rolando Goldman <rolandog@inprimis.com>
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+ *
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+ * Minor changes by Kianusch Sayah Karadji <kianusch@sk-tech.net>
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+ * ( Soekris net4801 Support, module-parameter )
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License
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+ * as published by the Free Software Foundation; either version
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+ * 2 of the License, or (at your option) any later version.
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+ *
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/types.h>
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+#include <linux/kernel.h>
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+#include <linux/fs.h>
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+#include <linux/mm.h>
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+#include <linux/miscdevice.h>
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+#include <linux/watchdog.h>
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+#include <linux/spinlock.h>
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+#include <linux/sysctl.h>
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+#include <linux/pci.h>
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+
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+/*
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+ * Since the SC1100 is an x86 clone, we don't even bother with
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+ * allowing other architectures to compile us.
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+ */
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+#ifndef CONFIG_X86
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+# error Sorry this driver is only for x86.
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+#endif
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+
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+#include <asm/system.h>
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+#include <asm/io.h>
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+#include <asm/uaccess.h>
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+#include <asm/processor.h>
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+
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+/* #define DEBUG_WD1100 */
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+
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+static int proc_wd_timeout(ctl_table *ctl,
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+ int write,
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+ struct file *file,
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+ void *buffer,
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+ size_t *lenp);
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+static int proc_wd_graceful(ctl_table *ctl,
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+ int write,
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+ struct file *file,
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+ void *buffer,
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+ size_t *lenp);
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+
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+/* Register definitions */
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+
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+#define SC1100_F5_VENDOR_ID 0x100B
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+#define SC1100_F5_DEVICE_ID 0x0515
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+
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+#define CPU_WDTO_REG 0x00 /* watchdog time out, 16 bit register */
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+#define CPU_WDCNFG_REG 0x02 /* watchdog config , 16 bit register */
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+#define CPU_WDSTS_REG 0x04 /* watchdog status , 8 bit register */
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+
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+/* Default timeout: 4 seconds (changeable via sysctl) */
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+static unsigned int sysctl_wd_timeout = 0;
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+static unsigned int sysctl_wd_graceful = 0;
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+
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+static unsigned int timeout = 4;
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+static unsigned int graceful = 1;
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+
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+MODULE_PARM (timeout, "i");
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+MODULE_PARM (graceful, "i");
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+
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+static int in_use = 0;
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+static unsigned short cpu_base;
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+static spinlock_t wd_lock;
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+
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+/**************************************************************************/
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+
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+/* XXX To-do: DEV_WATCHDOG must be in include/linux/sysctl.h */
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+enum
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+{ DEV_WATCHDOG = 6 };
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+
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+enum
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+{
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+ DEV_WD_TIMEOUT = 1,
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+ DEV_WD_GRACEFUL = 2
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+};
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+
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+static struct ctl_table_header *wd_table_header;
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+
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+static ctl_table wd_table[] = {
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+ {
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+ DEV_WD_TIMEOUT, "timeout",
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+ &sysctl_wd_timeout, sizeof(int), 0644, NULL, &proc_wd_timeout
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+ },
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+
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+ {
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+ DEV_WD_GRACEFUL, "graceful",
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+ &sysctl_wd_graceful, sizeof(int), 0644, NULL, &proc_wd_graceful
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+ },
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+
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+ {0}
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+};
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+
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+static ctl_table wd_dir_table[] = {
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+ {DEV_WATCHDOG, "wd", NULL, 0, 0555, wd_table},
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+ {0}
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+};
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+
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+static ctl_table wd_root_table[] = {
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+ {CTL_DEV, "dev", NULL, 0, 0555, wd_dir_table},
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+ {0}
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+};
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+
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+static int proc_wd_timeout(ctl_table *ctl,
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+ int write,
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+ struct file *file,
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+ void *buffer,
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+ size_t *lenp)
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+{
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+ int rc;
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+
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+ rc = proc_dointvec(ctl, write, file, buffer, lenp);
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+ if (write && (rc == 0))
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+ {
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+ /* Clamp to limits. */
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+ if (sysctl_wd_timeout < 1)
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+ sysctl_wd_timeout = 1;
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+ else if (sysctl_wd_timeout > 65535)
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+ sysctl_wd_timeout = 65535;
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+ }
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+
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+ return (rc);
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+}
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+
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+static int proc_wd_graceful(ctl_table *ctl,
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+ int write,
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+ struct file *file,
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+ void *buffer,
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+ size_t *lenp)
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+{
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+ int rc;
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+
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+ rc = proc_dointvec(ctl, write, file, buffer, lenp);
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+ if (write && (rc == 0))
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+ {
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+ /* Clamp to true/false. */
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+ if (sysctl_wd_graceful)
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+ sysctl_wd_graceful = 1;
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+ }
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+
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+ return (rc);
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+}
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+
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+/**************************************************************************/
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+
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+static __inline__ void reset_wd(void)
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+{
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+ outw(sysctl_wd_timeout * 8, cpu_base + CPU_WDTO_REG);
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+}
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+
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+static int reboot_reason(void)
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+{
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+ static int result;
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+ static int fetched = 0;
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+
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+ if (!fetched)
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+ {
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+ unsigned char sr;
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+
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+ sr = inb(cpu_base + CPU_WDSTS_REG);
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+ outb(sr | 1, cpu_base + CPU_WDSTS_REG);
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+
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+ fetched = 1;
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+ }
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+
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+ return (result);
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+}
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+
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+static struct watchdog_info wd_info =
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+{
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+ 0, /* Options */
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+ 0, /* Firmware version */
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+ "NSC SC1x00 WD"
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+};
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+
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+static int wd_ioctl(struct inode *inode,
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+ struct file *file,
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+ unsigned int cmd,
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+ unsigned long arg)
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+{
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+ int i;
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+
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+ switch (cmd)
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+ {
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+ default:
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+ return (-ENOTTY);
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+
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+ case WDIOC_GETSUPPORT:
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+ i = verify_area(VERIFY_WRITE, (void *)arg, sizeof(struct watchdog_info));
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+ if (i)
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+ return (i);
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+ else
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+ return copy_to_user((struct watchdog_info *)arg,
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+ &wd_info,
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+ sizeof(wd_info));
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+ break;
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+
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+ case WDIOC_KEEPALIVE:
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+ reset_wd();
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+ return (0);
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+
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+ case WDIOC_GETBOOTSTATUS:
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+ i = reboot_reason();
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+ return (put_user(i, (int *)arg));
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+
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+ case WDIOC_GETSTATUS:
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+ i = inw(cpu_base + CPU_WDTO_REG) / 8;
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+ return (put_user(i, (int *)arg));
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+ }
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+}
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+
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+static int wd_open(struct inode *inode,
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+ struct file *file)
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+{
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+ spin_lock(&wd_lock);
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+ if (in_use)
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+ {
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+ spin_unlock(&wd_lock);
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+ return (-EBUSY);
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+ }
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+ else
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+ in_use++;
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+
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+ spin_unlock(&wd_lock);
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+
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+ MOD_INC_USE_COUNT;
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+
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+ /*
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+ * Configure the chip to do a reset if the timer goes to 0.
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+ * Set the clock divisor to 4096.
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+ */
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+
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+ outw(0xfc, cpu_base + CPU_WDCNFG_REG);
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+
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+ /* Start the watchdog: It won't run until we write the TO reg. */
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+ reset_wd();
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+
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+ return (0);
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+}
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+
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+static int wd_release(struct inode *inode,
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+ struct file *file)
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+{
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+ spin_lock(&wd_lock);
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+
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+ in_use = 0;
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+
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+ /*
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+ * If graceful shutdown is not set, then don't bother to stop the
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+ * watchdog timer. This handles the scenario where the user process
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+ * that is poking the watchdog gets terminated due to some error
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+ * (say a SEGV or some VM condition).
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+ *
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+ * In that case, the kernel would happily close the descriptor for
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+ * us and leave us in a state where we aren't watching the dog...
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+ *
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+ * To work around this, the "graceful" sysctl prevents reset of the
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+ * watchdog on close.
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+ */
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+ if (sysctl_wd_graceful)
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+ outw(0, cpu_base + CPU_WDCNFG_REG);
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+
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+ spin_unlock(&wd_lock);
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+ MOD_DEC_USE_COUNT;
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+
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+ return (0);
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+}
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+
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+static ssize_t wd_write(struct file *file,
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+ const char *data,
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+ size_t len,
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+ loff_t *ppos)
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+{
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+ /* Device is non-seekable. */
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+ if (ppos != &file->f_pos)
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+ return (-ESPIPE);
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+
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+ if (len > 0)
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+ reset_wd();
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+
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+ return (len);
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+}
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+
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+static struct file_operations wd_fops=
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+{
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+ owner: THIS_MODULE,
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+ write: wd_write,
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+ ioctl: wd_ioctl,
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+ open: wd_open,
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+ release: wd_release,
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+};
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+
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+static struct miscdevice sc1x00wd_miscdev=
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+{
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+ WATCHDOG_MINOR,
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+ "watchdog",
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+ &wd_fops
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+};
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+
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+static int __init wd_init(void)
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+{
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+ int ret;
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+ struct pci_dev *dev;
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+ unsigned int cw;
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+
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+ if (timeout < 1)
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+ timeout = 1;
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+ else if (timeout > 65535)
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+ timeout = 65535;
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+
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+ if (graceful != 0)
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+ graceful = 1;
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+
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+ sysctl_wd_timeout=timeout;
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+ sysctl_wd_graceful=graceful;
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+
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+ if ((strcmp(boot_cpu_data.x86_vendor_id, "Geode by NSC") != 0)
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+ || ((boot_cpu_data.x86_model != 4) && boot_cpu_data.x86_model != 9))
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+ {
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+ printk(KERN_WARNING "wd1100.c: This is not an SC1100 processor!\n");
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+ return (0);
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+ }
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+
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+ /* get the CONFIG BLOCK ADDRESS from scratch pad register */
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+ dev = pci_find_device(SC1100_F5_VENDOR_ID,SC1100_F5_DEVICE_ID,0);
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+ if (dev == NULL)
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+ {
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+ printk(KERN_ERR "wd1100.c: Can not find bridge device.\n");
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+ return (0);
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+ }
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+
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+ pci_read_config_dword(dev, 0x64, &cw);
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+ cpu_base = (unsigned short )cw;
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+
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+#ifdef DEBUG_WD1100
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+ printk("wd1100.c: CPU base = 0x%X\n", (unsigned int )cpu_base);
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+#endif
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+
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+ printk(KERN_INFO "SC1x00 Watchdog driver by Inprimis Technolgies.\n");
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+ /*
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+ * We must call reboot_reason() to reset the flag in the WD.
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+ *
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+ * Even though it is available as an ioctl(), we call it during
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+ * module initialization to perform the clear. You can take out
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+ * the printk(), but don't take out the call to reboot_reason().
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+ */
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+ if (reboot_reason())
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+ printk(KERN_INFO "Last reboot was by watchdog!\n");
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+
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+ spin_lock_init(&wd_lock);
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+
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+ ret = misc_register(&sc1x00wd_miscdev);
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+ if (ret)
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+ printk(KERN_ERR "wd1100.c: Can't register device.\n");
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+ else
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+ {
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+ wd_table_header = register_sysctl_table(wd_root_table, 1);
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+ if (wd_table_header == NULL)
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+ printk(KERN_ERR "wd1100.c: Can't register sysctl.\n");
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+ }
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+
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+ return 0;
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+}
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+
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+static void __exit wd_exit(void)
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+{
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+ if (wd_table_header != NULL)
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+ unregister_sysctl_table(wd_table_header);
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+
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+ misc_deregister(&sc1x00wd_miscdev);
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+}
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+
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+EXPORT_NO_SYMBOLS;
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+
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+module_init(wd_init);
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+module_exit(wd_exit);
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+
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+MODULE_LICENSE("GPL");
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+
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