diff options
Diffstat (limited to 'target/linux/linux-2.4/patches/x86/002-wd1100.patch')
| -rw-r--r-- | target/linux/linux-2.4/patches/x86/002-wd1100.patch | 417 |
1 files changed, 417 insertions, 0 deletions
diff --git a/target/linux/linux-2.4/patches/x86/002-wd1100.patch b/target/linux/linux-2.4/patches/x86/002-wd1100.patch new file mode 100644 index 000000000..8cb2dbd04 --- /dev/null +++ b/target/linux/linux-2.4/patches/x86/002-wd1100.patch @@ -0,0 +1,417 @@ +diff -Nur linux-2.4.29/drivers/char/Config.in linux-2.4.29_geode/drivers/char/Config.in +--- linux-2.4.29/drivers/char/Config.in Sun Aug 8 01:26:04 2004 ++++ linux-2.4.29_geode/drivers/char/Config.in Tue Feb 15 23:41:54 2005 +@@ -270,6 +270,7 @@ + fi + fi + tristate ' ZF MachZ Watchdog' CONFIG_MACHZ_WDT ++ tristate ' Embedded NatSemi SC1x00 Watchdog' CONFIG_WD1100 + if [ "$CONFIG_SGI_IP22" = "y" ]; then + dep_tristate ' Indy/I2 Hardware Watchdog' CONFIG_INDYDOG $CONFIG_SGI_IP22 + fi +diff -Nur linux-2.4.29/drivers/char/Makefile linux-2.4.29_geode/drivers/char/Makefile +--- linux-2.4.29/drivers/char/Makefile Sun Aug 8 01:26:04 2004 ++++ linux-2.4.29_geode/drivers/char/Makefile Tue Feb 15 23:41:54 2005 +@@ -302,6 +302,7 @@ + obj-$(CONFIG_ACQUIRE_WDT) += acquirewdt.o + obj-$(CONFIG_ADVANTECH_WDT) += advantechwdt.o + obj-$(CONFIG_IB700_WDT) += ib700wdt.o ++obj-$(CONFIG_WD1100) += wd1100.o + obj-$(CONFIG_MIXCOMWD) += mixcomwd.o + obj-$(CONFIG_60XX_WDT) += sbc60xxwdt.o + obj-$(CONFIG_W83877F_WDT) += w83877f_wdt.o +diff -Nur linux-2.4.29/drivers/char/wd1100.c linux-2.4.29_geode/drivers/char/wd1100.c +--- linux-2.4.29/drivers/char/wd1100.c Thu Jan 1 01:00:00 1970 ++++ linux-2.4.29_geode/drivers/char/wd1100.c Tue Feb 15 23:41:54 2005 +@@ -0,0 +1,391 @@ ++/* ++ * National Semiconductor SC1x00 CPU watchdog driver ++ * Copyright (c) Inprimis Technologies 2002 ++ * ++ * by Mark Grosberg <markg@inprimis.com> ++ * and Rolando Goldman <rolandog@inprimis.com> ++ * ++ * Minor changes by Kianusch Sayah Karadji <kianusch@sk-tech.net> ++ * ( Soekris net4801 Support, module-parameter ) ++ * ++ * 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. ++ * ++ */ ++ ++#include <linux/module.h> ++#include <linux/types.h> ++#include <linux/kernel.h> ++#include <linux/fs.h> ++#include <linux/mm.h> ++#include <linux/miscdevice.h> ++#include <linux/watchdog.h> ++#include <linux/spinlock.h> ++#include <linux/sysctl.h> ++#include <linux/pci.h> ++ ++/* ++ * Since the SC1100 is an x86 clone, we don't even bother with ++ * allowing other architectures to compile us. ++ */ ++#ifndef CONFIG_X86 ++# error Sorry this driver is only for x86. ++#endif ++ ++#include <asm/system.h> ++#include <asm/io.h> ++#include <asm/uaccess.h> ++#include <asm/processor.h> ++ ++/* #define DEBUG_WD1100 */ ++ ++static int proc_wd_timeout(ctl_table *ctl, ++ int write, ++ struct file *file, ++ void *buffer, ++ size_t *lenp); ++static int proc_wd_graceful(ctl_table *ctl, ++ int write, ++ struct file *file, ++ void *buffer, ++ size_t *lenp); ++ ++/* Register definitions */ ++ ++#define SC1100_F5_VENDOR_ID 0x100B ++#define SC1100_F5_DEVICE_ID 0x0515 ++ ++#define CPU_WDTO_REG 0x00 /* watchdog time out, 16 bit register */ ++#define CPU_WDCNFG_REG 0x02 /* watchdog config , 16 bit register */ ++#define CPU_WDSTS_REG 0x04 /* watchdog status , 8 bit register */ ++ ++/* Default timeout: 4 seconds (changeable via sysctl) */ ++static unsigned int sysctl_wd_timeout = 0; ++static unsigned int sysctl_wd_graceful = 0; ++ ++static unsigned int timeout = 4; ++static unsigned int graceful = 1; ++ ++MODULE_PARM (timeout, "i"); ++MODULE_PARM (graceful, "i"); ++ ++static int in_use = 0; ++static unsigned short cpu_base; ++static spinlock_t wd_lock; ++ ++/**************************************************************************/ ++ ++/* XXX To-do: DEV_WATCHDOG must be in include/linux/sysctl.h */ ++enum ++{ DEV_WATCHDOG = 6 }; ++ ++enum ++{ ++ DEV_WD_TIMEOUT = 1, ++ DEV_WD_GRACEFUL = 2 ++}; ++ ++static struct ctl_table_header *wd_table_header; ++ ++static ctl_table wd_table[] = { ++ { ++ DEV_WD_TIMEOUT, "timeout", ++ &sysctl_wd_timeout, sizeof(int), 0644, NULL, &proc_wd_timeout ++ }, ++ ++ { ++ DEV_WD_GRACEFUL, "graceful", ++ &sysctl_wd_graceful, sizeof(int), 0644, NULL, &proc_wd_graceful ++ }, ++ ++ {0} ++}; ++ ++static ctl_table wd_dir_table[] = { ++ {DEV_WATCHDOG, "wd", NULL, 0, 0555, wd_table}, ++ {0} ++}; ++ ++static ctl_table wd_root_table[] = { ++ {CTL_DEV, "dev", NULL, 0, 0555, wd_dir_table}, ++ {0} ++}; ++ ++static int proc_wd_timeout(ctl_table *ctl, ++ int write, ++ struct file *file, ++ void *buffer, ++ size_t *lenp) ++{ ++ int rc; ++ ++ rc = proc_dointvec(ctl, write, file, buffer, lenp); ++ if (write && (rc == 0)) ++ { ++ /* Clamp to limits. */ ++ if (sysctl_wd_timeout < 1) ++ sysctl_wd_timeout = 1; ++ else if (sysctl_wd_timeout > 65535) ++ sysctl_wd_timeout = 65535; ++ } ++ ++ return (rc); ++} ++ ++static int proc_wd_graceful(ctl_table *ctl, ++ int write, ++ struct file *file, ++ void *buffer, ++ size_t *lenp) ++{ ++ int rc; ++ ++ rc = proc_dointvec(ctl, write, file, buffer, lenp); ++ if (write && (rc == 0)) ++ { ++ /* Clamp to true/false. */ ++ if (sysctl_wd_graceful) ++ sysctl_wd_graceful = 1; ++ } ++ ++ return (rc); ++} ++ ++/**************************************************************************/ ++ ++static __inline__ void reset_wd(void) ++{ ++ outw(sysctl_wd_timeout * 8, cpu_base + CPU_WDTO_REG); ++} ++ ++static int reboot_reason(void) ++{ ++ static int result; ++ static int fetched = 0; ++ ++ if (!fetched) ++ { ++ unsigned char sr; ++ ++ sr = inb(cpu_base + CPU_WDSTS_REG); ++ outb(sr | 1, cpu_base + CPU_WDSTS_REG); ++ ++ fetched = 1; ++ } ++ ++ return (result); ++} ++ ++static struct watchdog_info wd_info = ++{ ++ 0, /* Options */ ++ 0, /* Firmware version */ ++ "NSC SC1x00 WD" ++}; ++ ++static int wd_ioctl(struct inode *inode, ++ struct file *file, ++ unsigned int cmd, ++ unsigned long arg) ++{ ++ int i; ++ ++ switch (cmd) ++ { ++ default: ++ return (-ENOTTY); ++ ++ case WDIOC_GETSUPPORT: ++ i = verify_area(VERIFY_WRITE, (void *)arg, sizeof(struct watchdog_info)); ++ if (i) ++ return (i); ++ else ++ return copy_to_user((struct watchdog_info *)arg, ++ &wd_info, ++ sizeof(wd_info)); ++ break; ++ ++ case WDIOC_KEEPALIVE: ++ reset_wd(); ++ return (0); ++ ++ case WDIOC_GETBOOTSTATUS: ++ i = reboot_reason(); ++ return (put_user(i, (int *)arg)); ++ ++ case WDIOC_GETSTATUS: ++ i = inw(cpu_base + CPU_WDTO_REG) / 8; ++ return (put_user(i, (int *)arg)); ++ } ++} ++ ++static int wd_open(struct inode *inode, ++ struct file *file) ++{ ++ spin_lock(&wd_lock); ++ if (in_use) ++ { ++ spin_unlock(&wd_lock); ++ return (-EBUSY); ++ } ++ else ++ in_use++; ++ ++ spin_unlock(&wd_lock); ++ ++ MOD_INC_USE_COUNT; ++ ++ /* ++ * Configure the chip to do a reset if the timer goes to 0. ++ * Set the clock divisor to 4096. ++ */ ++ ++ outw(0xfc, cpu_base + CPU_WDCNFG_REG); ++ ++ /* Start the watchdog: It won't run until we write the TO reg. */ ++ reset_wd(); ++ ++ return (0); ++} ++ ++static int wd_release(struct inode *inode, ++ struct file *file) ++{ ++ spin_lock(&wd_lock); ++ ++ in_use = 0; ++ ++ /* ++ * If graceful shutdown is not set, then don't bother to stop the ++ * watchdog timer. This handles the scenario where the user process ++ * that is poking the watchdog gets terminated due to some error ++ * (say a SEGV or some VM condition). ++ * ++ * In that case, the kernel would happily close the descriptor for ++ * us and leave us in a state where we aren't watching the dog... ++ * ++ * To work around this, the "graceful" sysctl prevents reset of the ++ * watchdog on close. ++ */ ++ if (sysctl_wd_graceful) ++ outw(0, cpu_base + CPU_WDCNFG_REG); ++ ++ spin_unlock(&wd_lock); ++ MOD_DEC_USE_COUNT; ++ ++ return (0); ++} ++ ++static ssize_t wd_write(struct file *file, ++ const char *data, ++ size_t len, ++ loff_t *ppos) ++{ ++ /* Device is non-seekable. */ ++ if (ppos != &file->f_pos) ++ return (-ESPIPE); ++ ++ if (len > 0) ++ reset_wd(); ++ ++ return (len); ++} ++ ++static struct file_operations wd_fops= ++{ ++ owner: THIS_MODULE, ++ write: wd_write, ++ ioctl: wd_ioctl, ++ open: wd_open, ++ release: wd_release, ++}; ++ ++static struct miscdevice sc1x00wd_miscdev= ++{ ++ WATCHDOG_MINOR, ++ "watchdog", ++ &wd_fops ++}; ++ ++static int __init wd_init(void) ++{ ++ int ret; ++ struct pci_dev *dev; ++ unsigned int cw; ++ ++ if (timeout < 1) ++ timeout = 1; ++ else if (timeout > 65535) ++ timeout = 65535; ++ ++ if (graceful != 0) ++ graceful = 1; ++ ++ sysctl_wd_timeout=timeout; ++ sysctl_wd_graceful=graceful; ++ ++ if ((strcmp(boot_cpu_data.x86_vendor_id, "Geode by NSC") != 0) ++ || ((boot_cpu_data.x86_model != 4) && boot_cpu_data.x86_model != 9)) ++ { ++ printk(KERN_WARNING "wd1100.c: This is not an SC1100 processor!\n"); ++ return (0); ++ } ++ ++ /* get the CONFIG BLOCK ADDRESS from scratch pad register */ ++ dev = pci_find_device(SC1100_F5_VENDOR_ID,SC1100_F5_DEVICE_ID,0); ++ if (dev == NULL) ++ { ++ printk(KERN_ERR "wd1100.c: Can not find bridge device.\n"); ++ return (0); ++ } ++ ++ pci_read_config_dword(dev, 0x64, &cw); ++ cpu_base = (unsigned short )cw; ++ ++#ifdef DEBUG_WD1100 ++ printk("wd1100.c: CPU base = 0x%X\n", (unsigned int )cpu_base); ++#endif ++ ++ printk(KERN_INFO "SC1x00 Watchdog driver by Inprimis Technolgies.\n"); ++ /* ++ * We must call reboot_reason() to reset the flag in the WD. ++ * ++ * Even though it is available as an ioctl(), we call it during ++ * module initialization to perform the clear. You can take out ++ * the printk(), but don't take out the call to reboot_reason(). ++ */ ++ if (reboot_reason()) ++ printk(KERN_INFO "Last reboot was by watchdog!\n"); ++ ++ spin_lock_init(&wd_lock); ++ ++ ret = misc_register(&sc1x00wd_miscdev); ++ if (ret) ++ printk(KERN_ERR "wd1100.c: Can't register device.\n"); ++ else ++ { ++ wd_table_header = register_sysctl_table(wd_root_table, 1); ++ if (wd_table_header == NULL) ++ printk(KERN_ERR "wd1100.c: Can't register sysctl.\n"); ++ } ++ ++ return 0; ++} ++ ++static void __exit wd_exit(void) ++{ ++ if (wd_table_header != NULL) ++ unregister_sysctl_table(wd_table_header); ++ ++ misc_deregister(&sc1x00wd_miscdev); ++} ++ ++EXPORT_NO_SYMBOLS; ++ ++module_init(wd_init); ++module_exit(wd_exit); ++ ++MODULE_LICENSE("GPL"); ++ |