To compile this driver as a module, choose M here: the
module will be called iTCO_wdt.
+config ITCO_VENDOR_SUPPORT
+ bool "Intel TCO Timer/Watchdog Specific Vendor Support"
+ depends on ITCO_WDT
+ ---help---
+ Add vendor specific support to the intel TCO timer based watchdog
+ devices. At this moment we only have additional support for some
+ SuperMicro Inc. motherboards.
+
config SC1200_WDT
tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog"
depends on WATCHDOG && X86
If compiled as a module, it will be called scx200_wdt.
+config PC87413_WDT
+ tristate "NS PC87413 watchdog"
+ depends on WATCHDOG && X86
+ ---help---
+ This is the driver for the hardware watchdog on the PC87413 chipset
+ This watchdog simply watches your kernel to make sure it doesn't
+ freeze, and if it does, it reboots your computer after a certain
+ amount of time.
+
+ To compile this driver as a module, choose M here: the
+ module will be called pc87413_wdt.
+
+ Most people will say N.
+
config 60XX_WDT
tristate "SBC-60XX Watchdog Timer"
depends on WATCHDOG && X86
timer expired and no process has written to /dev/watchdog during
that time.
+config WDT_RM9K_GPI
+ tristate "RM9000/GPI hardware watchdog"
+ depends on WATCHDOG && CPU_RM9000
+ help
+ Watchdog implementation using the GPI hardware found on
+ PMC-Sierra RM9xxx CPUs.
+
+ To compile this driver as a module, choose M here: the
+ module will be called rm9k_wdt.
+
# S390 Architecture
config ZVM_WATCHDOG
obj-$(CONFIG_WAFER_WDT) += wafer5823wdt.o
obj-$(CONFIG_I6300ESB_WDT) += i6300esb.o
obj-$(CONFIG_I8XX_TCO) += i8xx_tco.o
-obj-$(CONFIG_ITCO_WDT) += iTCO_wdt.o
+obj-$(CONFIG_ITCO_WDT) += iTCO_wdt.o iTCO_vendor_support.o
obj-$(CONFIG_SC1200_WDT) += sc1200wdt.o
obj-$(CONFIG_SCx200_WDT) += scx200_wdt.o
+obj-$(CONFIG_PC87413_WDT) += pc87413_wdt.o
obj-$(CONFIG_60XX_WDT) += sbc60xxwdt.o
obj-$(CONFIG_SBC8360_WDT) += sbc8360.o
obj-$(CONFIG_CPU5_WDT) += cpu5wdt.o
# MIPS Architecture
obj-$(CONFIG_INDYDOG) += indydog.o
+obj-$(CONFIG_WDT_RM9K_GPI) += rm9k_wdt.o
# S390 Architecture
--- /dev/null
+/*
+ * intel TCO vendor specific watchdog driver support
+ *
+ * (c) Copyright 2006 Wim Van Sebroeck <wim@iguana.be>.
+ *
+ * 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.
+ *
+ * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor
+ * provide warranty for any of this software. This material is
+ * provided "AS-IS" and at no charge.
+ */
+
+/*
+ * Includes, defines, variables, module parameters, ...
+ */
+
+/* Module and version information */
+#define DRV_NAME "iTCO_vendor_support"
+#define DRV_VERSION "1.01"
+#define DRV_RELDATE "11-Nov-2006"
+#define PFX DRV_NAME ": "
+
+/* Includes */
+#include <linux/module.h> /* For module specific items */
+#include <linux/moduleparam.h> /* For new moduleparam's */
+#include <linux/types.h> /* For standard types (like size_t) */
+#include <linux/errno.h> /* For the -ENODEV/... values */
+#include <linux/kernel.h> /* For printk/panic/... */
+#include <linux/init.h> /* For __init/__exit/... */
+#include <linux/ioport.h> /* For io-port access */
+
+#include <asm/io.h> /* For inb/outb/... */
+
+/* iTCO defines */
+#define SMI_EN acpibase + 0x30 /* SMI Control and Enable Register */
+#define TCOBASE acpibase + 0x60 /* TCO base address */
+#define TCO1_STS TCOBASE + 0x04 /* TCO1 Status Register */
+
+/* List of vendor support modes */
+#define SUPERMICRO_OLD_BOARD 1 /* SuperMicro Pentium 3 Era 370SSE+-OEM1/P3TSSE */
+#define SUPERMICRO_NEW_BOARD 2 /* SuperMicro Pentium 4 / Xeon 4 / EMT64T Era Systems */
+
+static int vendorsupport = 0;
+module_param(vendorsupport, int, 0);
+MODULE_PARM_DESC(vendorsupport, "iTCO vendor specific support mode, default=0 (none), 1=SuperMicro Pent3, 2=SuperMicro Pent4+");
+
+/*
+ * Vendor Specific Support
+ */
+
+/*
+ * Vendor Support: 1
+ * Board: Super Micro Computer Inc. 370SSE+-OEM1/P3TSSE
+ * iTCO chipset: ICH2
+ *
+ * Code contributed by: R. Seretny <lkpatches@paypc.com>
+ * Documentation obtained by R. Seretny from SuperMicro Technical Support
+ *
+ * To enable Watchdog function:
+ * BIOS setup -> Power -> TCO Logic SMI Enable -> Within5Minutes
+ * This setting enables SMI to clear the watchdog expired flag.
+ * If BIOS or CPU fail which may cause SMI hang, then system will
+ * reboot. When application starts to use watchdog function,
+ * application has to take over the control from SMI.
+ *
+ * For P3TSSE, J36 jumper needs to be removed to enable the Watchdog
+ * function.
+ *
+ * Note: The system will reboot when Expire Flag is set TWICE.
+ * So, if the watchdog timer is 20 seconds, then the maximum hang
+ * time is about 40 seconds, and the minimum hang time is about
+ * 20.6 seconds.
+ */
+
+static void supermicro_old_pre_start(unsigned long acpibase)
+{
+ unsigned long val32;
+
+ val32 = inl(SMI_EN);
+ val32 &= 0xffffdfff; /* Turn off SMI clearing watchdog */
+ outl(val32, SMI_EN); /* Needed to activate watchdog */
+}
+
+static void supermicro_old_pre_stop(unsigned long acpibase)
+{
+ unsigned long val32;
+
+ val32 = inl(SMI_EN);
+ val32 &= 0x00002000; /* Turn on SMI clearing watchdog */
+ outl(val32, SMI_EN); /* Needed to deactivate watchdog */
+}
+
+static void supermicro_old_pre_keepalive(unsigned long acpibase)
+{
+ /* Reload TCO Timer (done in iTCO_wdt_keepalive) + */
+ /* Clear "Expire Flag" (Bit 3 of TC01_STS register) */
+ outb(0x08, TCO1_STS);
+}
+
+/*
+ * Vendor Support: 2
+ * Board: Super Micro Computer Inc. P4SBx, P4DPx
+ * iTCO chipset: ICH4
+ *
+ * Code contributed by: R. Seretny <lkpatches@paypc.com>
+ * Documentation obtained by R. Seretny from SuperMicro Technical Support
+ *
+ * To enable Watchdog function:
+ * 1. BIOS
+ * For P4SBx:
+ * BIOS setup -> Advanced -> Integrated Peripherals -> Watch Dog Feature
+ * For P4DPx:
+ * BIOS setup -> Advanced -> I/O Device Configuration -> Watch Dog
+ * This setting enables or disables Watchdog function. When enabled, the
+ * default watchdog timer is set to be 5 minutes (about 4’35”). It is
+ * enough to load and run the OS. The application (service or driver) has
+ * to take over the control once OS is running up and before watchdog
+ * expires.
+ *
+ * 2. JUMPER
+ * For P4SBx: JP39
+ * For P4DPx: JP37
+ * This jumper is used for safety. Closed is enabled. This jumper
+ * prevents user enables watchdog in BIOS by accident.
+ *
+ * To enable Watch Dog function, both BIOS and JUMPER must be enabled.
+ *
+ * The documentation lists motherboards P4SBx and P4DPx series as of
+ * 20-March-2002. However, this code works flawlessly with much newer
+ * motherboards, such as my X6DHR-8G2 (SuperServer 6014H-82).
+ *
+ * The original iTCO driver as written does not actually reset the
+ * watchdog timer on these machines, as a result they reboot after five
+ * minutes.
+ *
+ * NOTE: You may leave the Watchdog function disabled in the SuperMicro
+ * BIOS to avoid a "boot-race"... This driver will enable watchdog
+ * functionality even if it's disabled in the BIOS once the /dev/watchdog
+ * file is opened.
+ */
+
+/* I/O Port's */
+#define SM_REGINDEX 0x2e /* SuperMicro ICH4+ Register Index */
+#define SM_DATAIO 0x2f /* SuperMicro ICH4+ Register Data I/O */
+
+/* Control Register's */
+#define SM_CTLPAGESW 0x07 /* SuperMicro ICH4+ Control Page Switch */
+#define SM_CTLPAGE 0x08 /* SuperMicro ICH4+ Control Page Num */
+
+#define SM_WATCHENABLE 0x30 /* Watchdog enable: Bit 0: 0=off, 1=on */
+
+#define SM_WATCHPAGE 0x87 /* Watchdog unlock control page */
+
+#define SM_ENDWATCH 0xAA /* Watchdog lock control page */
+
+#define SM_COUNTMODE 0xf5 /* Watchdog count mode select */
+ /* (Bit 3: 0 = seconds, 1 = minutes */
+
+#define SM_WATCHTIMER 0xf6 /* 8-bits, Watchdog timer counter (RW) */
+
+#define SM_RESETCONTROL 0xf7 /* Watchdog reset control */
+ /* Bit 6: timer is reset by kbd interrupt */
+ /* Bit 7: timer is reset by mouse interrupt */
+
+static void supermicro_new_unlock_watchdog(void)
+{
+ outb(SM_WATCHPAGE, SM_REGINDEX); /* Write 0x87 to port 0x2e twice */
+ outb(SM_WATCHPAGE, SM_REGINDEX);
+
+ outb(SM_CTLPAGESW, SM_REGINDEX); /* Switch to watchdog control page */
+ outb(SM_CTLPAGE, SM_DATAIO);
+}
+
+static void supermicro_new_lock_watchdog(void)
+{
+ outb(SM_ENDWATCH, SM_REGINDEX);
+}
+
+static void supermicro_new_pre_start(unsigned int heartbeat)
+{
+ unsigned int val;
+
+ supermicro_new_unlock_watchdog();
+
+ /* Watchdog timer setting needs to be in seconds*/
+ outb(SM_COUNTMODE, SM_REGINDEX);
+ val = inb(SM_DATAIO);
+ val &= 0xF7;
+ outb(val, SM_DATAIO);
+
+ /* Write heartbeat interval to WDOG */
+ outb (SM_WATCHTIMER, SM_REGINDEX);
+ outb((heartbeat & 255), SM_DATAIO);
+
+ /* Make sure keyboard/mouse interrupts don't interfere */
+ outb(SM_RESETCONTROL, SM_REGINDEX);
+ val = inb(SM_DATAIO);
+ val &= 0x3f;
+ outb(val, SM_DATAIO);
+
+ /* enable watchdog by setting bit 0 of Watchdog Enable to 1 */
+ outb(SM_WATCHENABLE, SM_REGINDEX);
+ val = inb(SM_DATAIO);
+ val |= 0x01;
+ outb(val, SM_DATAIO);
+
+ supermicro_new_lock_watchdog();
+}
+
+static void supermicro_new_pre_stop(void)
+{
+ unsigned int val;
+
+ supermicro_new_unlock_watchdog();
+
+ /* disable watchdog by setting bit 0 of Watchdog Enable to 0 */
+ outb(SM_WATCHENABLE, SM_REGINDEX);
+ val = inb(SM_DATAIO);
+ val &= 0xFE;
+ outb(val, SM_DATAIO);
+
+ supermicro_new_lock_watchdog();
+}
+
+static void supermicro_new_pre_set_heartbeat(unsigned int heartbeat)
+{
+ supermicro_new_unlock_watchdog();
+
+ /* reset watchdog timeout to heartveat value */
+ outb(SM_WATCHTIMER, SM_REGINDEX);
+ outb((heartbeat & 255), SM_DATAIO);
+
+ supermicro_new_lock_watchdog();
+}
+
+/*
+ * Generic Support Functions
+ */
+
+void iTCO_vendor_pre_start(unsigned long acpibase,
+ unsigned int heartbeat)
+{
+ if (vendorsupport == SUPERMICRO_OLD_BOARD)
+ supermicro_old_pre_start(acpibase);
+ else if (vendorsupport == SUPERMICRO_NEW_BOARD)
+ supermicro_new_pre_start(heartbeat);
+}
+EXPORT_SYMBOL(iTCO_vendor_pre_start);
+
+void iTCO_vendor_pre_stop(unsigned long acpibase)
+{
+ if (vendorsupport == SUPERMICRO_OLD_BOARD)
+ supermicro_old_pre_stop(acpibase);
+ else if (vendorsupport == SUPERMICRO_NEW_BOARD)
+ supermicro_new_pre_stop();
+}
+EXPORT_SYMBOL(iTCO_vendor_pre_stop);
+
+void iTCO_vendor_pre_keepalive(unsigned long acpibase, unsigned int heartbeat)
+{
+ if (vendorsupport == SUPERMICRO_OLD_BOARD)
+ supermicro_old_pre_keepalive(acpibase);
+ else if (vendorsupport == SUPERMICRO_NEW_BOARD)
+ supermicro_new_pre_set_heartbeat(heartbeat);
+}
+EXPORT_SYMBOL(iTCO_vendor_pre_keepalive);
+
+void iTCO_vendor_pre_set_heartbeat(unsigned int heartbeat)
+{
+ if (vendorsupport == SUPERMICRO_NEW_BOARD)
+ supermicro_new_pre_set_heartbeat(heartbeat);
+}
+EXPORT_SYMBOL(iTCO_vendor_pre_set_heartbeat);
+
+int iTCO_vendor_check_noreboot_on(void)
+{
+ switch(vendorsupport) {
+ case SUPERMICRO_OLD_BOARD:
+ return 0;
+ default:
+ return 1;
+ }
+}
+EXPORT_SYMBOL(iTCO_vendor_check_noreboot_on);
+
+static int __init iTCO_vendor_init_module(void)
+{
+ printk (KERN_INFO PFX "vendor-support=%d\n", vendorsupport);
+ return 0;
+}
+
+static void __exit iTCO_vendor_exit_module(void)
+{
+ printk (KERN_INFO PFX "Module Unloaded\n");
+}
+
+module_init(iTCO_vendor_init_module);
+module_exit(iTCO_vendor_exit_module);
+
+MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>, R. Seretny <lkpatches@paypc.com>");
+MODULE_DESCRIPTION("Intel TCO Vendor Specific WatchDog Timer Driver Support");
+MODULE_VERSION(DRV_VERSION);
+MODULE_LICENSE("GPL");
+
/* Module and version information */
#define DRV_NAME "iTCO_wdt"
-#define DRV_VERSION "1.00"
-#define DRV_RELDATE "08-Oct-2006"
+#define DRV_VERSION "1.01"
+#define DRV_RELDATE "11-Nov-2006"
#define PFX DRV_NAME ": "
/* Includes */
module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)");
+/* iTCO Vendor Specific Support hooks */
+#ifdef CONFIG_ITCO_VENDOR_SUPPORT
+extern void iTCO_vendor_pre_start(unsigned long, unsigned int);
+extern void iTCO_vendor_pre_stop(unsigned long);
+extern void iTCO_vendor_pre_keepalive(unsigned long, unsigned int);
+extern void iTCO_vendor_pre_set_heartbeat(unsigned int);
+extern int iTCO_vendor_check_noreboot_on(void);
+#else
+#define iTCO_vendor_pre_start(acpibase, heartbeat) {}
+#define iTCO_vendor_pre_stop(acpibase) {}
+#define iTCO_vendor_pre_keepalive(acpibase,heartbeat) {}
+#define iTCO_vendor_pre_set_heartbeat(heartbeat) {}
+#define iTCO_vendor_check_noreboot_on() 1 /* 1=check noreboot; 0=don't check */
+#endif
+
/*
* Some TCO specific functions
*/
spin_lock(&iTCO_wdt_private.io_lock);
+ iTCO_vendor_pre_start(iTCO_wdt_private.ACPIBASE, heartbeat);
+
/* disable chipset's NO_REBOOT bit */
if (iTCO_wdt_unset_NO_REBOOT_bit()) {
printk(KERN_ERR PFX "failed to reset NO_REBOOT flag, reboot disabled by hardware\n");
spin_lock(&iTCO_wdt_private.io_lock);
+ iTCO_vendor_pre_stop(iTCO_wdt_private.ACPIBASE);
+
/* Bit 11: TCO Timer Halt -> 1 = The TCO timer is disabled */
val = inw(TCO1_CNT);
val |= 0x0800;
{
spin_lock(&iTCO_wdt_private.io_lock);
+ iTCO_vendor_pre_keepalive(iTCO_wdt_private.ACPIBASE, heartbeat);
+
/* Reload the timer by writing to the TCO Timer Counter register */
if (iTCO_wdt_private.iTCO_version == 2) {
outw(0x01, TCO_RLD);
((iTCO_wdt_private.iTCO_version == 1) && (tmrval > 0x03f)))
return -EINVAL;
+ iTCO_vendor_pre_set_heartbeat(tmrval);
+
/* Write new heartbeat to watchdog */
if (iTCO_wdt_private.iTCO_version == 2) {
spin_lock(&iTCO_wdt_private.io_lock);
}
/* Check chipset's NO_REBOOT bit */
- if (iTCO_wdt_unset_NO_REBOOT_bit()) {
+ if (iTCO_wdt_unset_NO_REBOOT_bit() && iTCO_vendor_check_noreboot_on()) {
printk(KERN_ERR PFX "failed to reset NO_REBOOT flag, reboot disabled by hardware\n");
ret = -ENODEV; /* Cannot reset NO_REBOOT bit */
goto out;
--- /dev/null
+/*
+ * NS pc87413-wdt Watchdog Timer driver for Linux 2.6.x.x
+ *
+ * This code is based on wdt.c with original copyright.
+ *
+ * (C) Copyright 2006 Sven Anders, <anders@anduras.de>
+ * and Marcus Junker, <junker@anduras.de>
+ *
+ * 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.
+ *
+ * Neither Sven Anders, Marcus Junker nor ANDURAS AG
+ * admit liability nor provide warranty for any of this software.
+ * This material is provided "AS-IS" and at no charge.
+ *
+ * Release 1.1
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/notifier.h>
+#include <linux/fs.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/moduleparam.h>
+#include <linux/version.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+/* #define DEBUG 1 */
+
+#define DEFAULT_TIMEOUT 1 /* 1 minute */
+#define MAX_TIMEOUT 255
+
+#define VERSION "1.1"
+#define MODNAME "pc87413 WDT"
+#define PFX MODNAME ": "
+#define DPFX MODNAME " - DEBUG: "
+
+#define WDT_INDEX_IO_PORT (io+0) /* I/O port base (index register) */
+#define WDT_DATA_IO_PORT (WDT_INDEX_IO_PORT+1)
+#define SWC_LDN 0x04
+#define SIOCFG2 0x22 /* Serial IO register */
+#define WDCTL 0x10 /* Watchdog-Timer-Controll-Register */
+#define WDTO 0x11 /* Watchdog timeout register */
+#define WDCFG 0x12 /* Watchdog config register */
+
+static int io = 0x2E; /* Address used on Portwell Boards */
+
+static int timeout = DEFAULT_TIMEOUT; /* timeout value */
+static unsigned long timer_enabled = 0; /* is the timer enabled? */
+
+static char expect_close; /* is the close expected? */
+
+static spinlock_t io_lock; /* to guard the watchdog from io races */
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+
+/* -- Low level function ----------------------------------------*/
+
+/* Select pins for Watchdog output */
+
+static inline void pc87413_select_wdt_out (void)
+{
+ unsigned int cr_data = 0;
+
+ /* Step 1: Select multiple pin,pin55,as WDT output */
+
+ outb_p(SIOCFG2, WDT_INDEX_IO_PORT);
+
+ cr_data = inb (WDT_DATA_IO_PORT);
+
+ cr_data |= 0x80; /* Set Bit7 to 1*/
+ outb_p(SIOCFG2, WDT_INDEX_IO_PORT);
+
+ outb_p(cr_data, WDT_DATA_IO_PORT);
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "Select multiple pin,pin55,as WDT output:"
+ " Bit7 to 1: %d\n", cr_data);
+#endif
+}
+
+/* Enable SWC functions */
+
+static inline void pc87413_enable_swc(void)
+{
+ unsigned int cr_data=0;
+
+ /* Step 2: Enable SWC functions */
+
+ outb_p(0x07, WDT_INDEX_IO_PORT); /* Point SWC_LDN (LDN=4) */
+ outb_p(SWC_LDN, WDT_DATA_IO_PORT);
+
+ outb_p(0x30, WDT_INDEX_IO_PORT); /* Read Index 0x30 First */
+ cr_data = inb(WDT_DATA_IO_PORT);
+ cr_data |= 0x01; /* Set Bit0 to 1 */
+ outb_p(0x30, WDT_INDEX_IO_PORT);
+ outb_p(cr_data, WDT_DATA_IO_PORT); /* Index0x30_bit0P1 */
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "pc87413 - Enable SWC functions\n");
+#endif
+}
+
+/* Read SWC I/O base address */
+
+static inline unsigned int pc87413_get_swc_base(void)
+{
+ unsigned int swc_base_addr = 0;
+ unsigned char addr_l, addr_h = 0;
+
+ /* Step 3: Read SWC I/O Base Address */
+
+ outb_p(0x60, WDT_INDEX_IO_PORT); /* Read Index 0x60 */
+ addr_h = inb(WDT_DATA_IO_PORT);
+
+ outb_p(0x61, WDT_INDEX_IO_PORT); /* Read Index 0x61 */
+
+ addr_l = inb(WDT_DATA_IO_PORT);
+
+ swc_base_addr = (addr_h << 8) + addr_l;
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "Read SWC I/O Base Address: low %d, high %d,"
+ " res %d\n", addr_l, addr_h, swc_base_addr);
+#endif
+
+ return swc_base_addr;
+}
+
+/* Select Bank 3 of SWC */
+
+static inline void pc87413_swc_bank3(unsigned int swc_base_addr)
+{
+ /* Step 4: Select Bank3 of SWC */
+
+ outb_p(inb(swc_base_addr + 0x0f) | 0x03, swc_base_addr + 0x0f);
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "Select Bank3 of SWC\n");
+#endif
+}
+
+/* Set watchdog timeout to x minutes */
+
+static inline void pc87413_programm_wdto(unsigned int swc_base_addr,
+ char pc87413_time)
+{
+ /* Step 5: Programm WDTO, Twd. */
+
+ outb_p(pc87413_time, swc_base_addr + WDTO);
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "Set WDTO to %d minutes\n", pc87413_time);
+#endif
+}
+
+/* Enable WDEN */
+
+static inline void pc87413_enable_wden(unsigned int swc_base_addr)
+{
+ /* Step 6: Enable WDEN */
+
+ outb_p(inb (swc_base_addr + WDCTL) | 0x01, swc_base_addr + WDCTL);
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "Enable WDEN\n");
+#endif
+}
+
+/* Enable SW_WD_TREN */
+static inline void pc87413_enable_sw_wd_tren(unsigned int swc_base_addr)
+{
+ /* Enable SW_WD_TREN */
+
+ outb_p(inb (swc_base_addr + WDCFG) | 0x80, swc_base_addr + WDCFG);
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "Enable SW_WD_TREN\n");
+#endif
+}
+
+/* Disable SW_WD_TREN */
+
+static inline void pc87413_disable_sw_wd_tren(unsigned int swc_base_addr)
+{
+ /* Disable SW_WD_TREN */
+
+ outb_p(inb (swc_base_addr + WDCFG) & 0x7f, swc_base_addr + WDCFG);
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "pc87413 - Disable SW_WD_TREN\n");
+#endif
+}
+
+/* Enable SW_WD_TRG */
+
+static inline void pc87413_enable_sw_wd_trg(unsigned int swc_base_addr)
+{
+ /* Enable SW_WD_TRG */
+
+ outb_p(inb (swc_base_addr + WDCTL) | 0x80, swc_base_addr + WDCTL);
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "pc87413 - Enable SW_WD_TRG\n");
+#endif
+}
+
+/* Disable SW_WD_TRG */
+
+static inline void pc87413_disable_sw_wd_trg(unsigned int swc_base_addr)
+{
+ /* Disable SW_WD_TRG */
+
+ outb_p(inb (swc_base_addr + WDCTL) & 0x7f, swc_base_addr + WDCTL);
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "Disable SW_WD_TRG\n");
+#endif
+}
+
+/* -- Higher level functions ------------------------------------*/
+
+/* Enable the watchdog */
+
+static void pc87413_enable(void)
+{
+ unsigned int swc_base_addr;
+
+ spin_lock(&io_lock);
+
+ pc87413_select_wdt_out();
+ pc87413_enable_swc();
+ swc_base_addr = pc87413_get_swc_base();
+ pc87413_swc_bank3(swc_base_addr);
+ pc87413_programm_wdto(swc_base_addr, timeout);
+ pc87413_enable_wden(swc_base_addr);
+ pc87413_enable_sw_wd_tren(swc_base_addr);
+ pc87413_enable_sw_wd_trg(swc_base_addr);
+
+ spin_unlock(&io_lock);
+}
+
+/* Disable the watchdog */
+
+static void pc87413_disable(void)
+{
+ unsigned int swc_base_addr;
+
+ spin_lock(&io_lock);
+
+ pc87413_select_wdt_out();
+ pc87413_enable_swc();
+ swc_base_addr = pc87413_get_swc_base();
+ pc87413_swc_bank3(swc_base_addr);
+ pc87413_disable_sw_wd_tren(swc_base_addr);
+ pc87413_disable_sw_wd_trg(swc_base_addr);
+ pc87413_programm_wdto(swc_base_addr, 0);
+
+ spin_unlock(&io_lock);
+}
+
+/* Refresh the watchdog */
+
+static void pc87413_refresh(void)
+{
+ unsigned int swc_base_addr;
+
+ spin_lock(&io_lock);
+
+ pc87413_select_wdt_out();
+ pc87413_enable_swc();
+ swc_base_addr = pc87413_get_swc_base();
+ pc87413_swc_bank3(swc_base_addr);
+ pc87413_disable_sw_wd_tren(swc_base_addr);
+ pc87413_disable_sw_wd_trg(swc_base_addr);
+ pc87413_programm_wdto(swc_base_addr, timeout);
+ pc87413_enable_wden(swc_base_addr);
+ pc87413_enable_sw_wd_tren(swc_base_addr);
+ pc87413_enable_sw_wd_trg(swc_base_addr);
+
+ spin_unlock(&io_lock);
+}
+
+/* -- File operations -------------------------------------------*/
+
+/**
+ * pc87413_open:
+ * @inode: inode of device
+ * @file: file handle to device
+ *
+ */
+
+static int pc87413_open(struct inode *inode, struct file *file)
+{
+ /* /dev/watchdog can only be opened once */
+
+ if (test_and_set_bit(0, &timer_enabled))
+ return -EBUSY;
+
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ /* Reload and activate timer */
+ pc87413_refresh();
+
+ printk(KERN_INFO MODNAME "Watchdog enabled. Timeout set to"
+ " %d minute(s).\n", timeout);
+
+ return nonseekable_open(inode, file);
+}
+
+/**
+ * pc87413_release:
+ * @inode: inode to board
+ * @file: file handle to board
+ *
+ * The watchdog has a configurable API. There is a religious dispute
+ * between people who want their watchdog to be able to shut down and
+ * those who want to be sure if the watchdog manager dies the machine
+ * reboots. In the former case we disable the counters, in the latter
+ * case you have to open it again very soon.
+ */
+
+static int pc87413_release(struct inode *inode, struct file *file)
+{
+ /* Shut off the timer. */
+
+ if (expect_close == 42) {
+ pc87413_disable();
+ printk(KERN_INFO MODNAME "Watchdog disabled,"
+ " sleeping again...\n");
+ } else {
+ printk(KERN_CRIT MODNAME "Unexpected close, not stopping"
+ " watchdog!\n");
+ pc87413_refresh();
+ }
+
+ clear_bit(0, &timer_enabled);
+ expect_close = 0;
+
+ return 0;
+}
+
+/**
+ * pc87413_status:
+ *
+ * return, if the watchdog is enabled (timeout is set...)
+ */
+
+
+static int pc87413_status(void)
+{
+ return 0; /* currently not supported */
+}
+
+/**
+ * pc87413_write:
+ * @file: file handle to the watchdog
+ * @data: data buffer to write
+ * @len: length in bytes
+ * @ppos: pointer to the position to write. No seeks allowed
+ *
+ * A write to a watchdog device is defined as a keepalive signal. Any
+ * write of data will do, as we we don't define content meaning.
+ */
+
+static ssize_t pc87413_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
+{
+ /* See if we got the magic character 'V' and reload the timer */
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ /* reset expect flag */
+ expect_close = 0;
+
+ /* scan to see whether or not we got the magic character */
+ for (i = 0; i != len; i++) {
+ char c;
+ if (get_user(c, data+i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+
+ /* someone wrote to us, we should reload the timer */
+ pc87413_refresh();
+ }
+ return len;
+}
+
+/**
+ * pc87413_ioctl:
+ * @inode: inode of the device
+ * @file: file handle to the device
+ * @cmd: watchdog command
+ * @arg: argument pointer
+ *
+ * The watchdog API defines a common set of functions for all watchdogs
+ * according to their available features. We only actually usefully support
+ * querying capabilities and current status.
+ */
+
+static int pc87413_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int new_timeout;
+
+ union {
+ struct watchdog_info __user *ident;
+ int __user *i;
+ } uarg;
+
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING |
+ WDIOF_SETTIMEOUT |
+ WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = "PC87413(HF/F) watchdog"
+ };
+
+ uarg.i = (int __user *)arg;
+
+ switch(cmd) {
+ default:
+ return -ENOTTY;
+
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(uarg.ident, &ident,
+ sizeof(ident)) ? -EFAULT : 0;
+
+ case WDIOC_GETSTATUS:
+ return put_user(pc87413_status(), uarg.i);
+
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, uarg.i);
+
+ case WDIOC_KEEPALIVE:
+ pc87413_refresh();
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "keepalive\n");
+#endif
+ return 0;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_timeout, uarg.i))
+ return -EFAULT;
+
+ // the API states this is given in secs
+ new_timeout /= 60;
+
+ if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
+ return -EINVAL;
+
+ timeout = new_timeout;
+ pc87413_refresh();
+
+ // fall through and return the new timeout...
+
+ case WDIOC_GETTIMEOUT:
+
+ new_timeout = timeout * 60;
+
+ return put_user(new_timeout, uarg.i);
+
+ case WDIOC_SETOPTIONS:
+ {
+ int options, retval = -EINVAL;
+
+ if (get_user(options, uarg.i))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD) {
+ pc87413_disable();
+ retval = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD) {
+ pc87413_enable();
+ retval = 0;
+ }
+
+ return retval;
+ }
+ }
+}
+
+/* -- Notifier funtions -----------------------------------------*/
+
+/**
+ * notify_sys:
+ * @this: our notifier block
+ * @code: the event being reported
+ * @unused: unused
+ *
+ * Our notifier is called on system shutdowns. We want to turn the card
+ * off at reboot otherwise the machine will reboot again during memory
+ * test or worse yet during the following fsck. This would suck, in fact
+ * trust me - if it happens it does suck.
+ */
+
+static int pc87413_notify_sys(struct notifier_block *this,
+ unsigned long code,
+ void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT)
+ {
+ /* Turn the card off */
+ pc87413_disable();
+ }
+ return NOTIFY_DONE;
+}
+
+/* -- Module's structures ---------------------------------------*/
+
+static struct file_operations pc87413_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = pc87413_write,
+ .ioctl = pc87413_ioctl,
+ .open = pc87413_open,
+ .release = pc87413_release,
+};
+
+static struct notifier_block pc87413_notifier =
+{
+ .notifier_call = pc87413_notify_sys,
+};
+
+static struct miscdevice pc87413_miscdev=
+{
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &pc87413_fops
+};
+
+/* -- Module init functions -------------------------------------*/
+
+/**
+ * pc87413_init: module's "constructor"
+ *
+ * Set up the WDT watchdog board. All we have to do is grab the
+ * resources we require and bitch if anyone beat us to them.
+ * The open() function will actually kick the board off.
+ */
+
+static int __init pc87413_init(void)
+{
+ int ret;
+
+ spin_lock_init(&io_lock);
+
+ printk(KERN_INFO PFX "Version " VERSION " at io 0x%X\n", WDT_INDEX_IO_PORT);
+
+ /* request_region(io, 2, "pc87413"); */
+
+ ret = register_reboot_notifier(&pc87413_notifier);
+ if (ret != 0) {
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ ret);
+ }
+
+ ret = misc_register(&pc87413_miscdev);
+
+ if (ret != 0) {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ unregister_reboot_notifier(&pc87413_notifier);
+ return ret;
+ }
+
+ printk(KERN_INFO PFX "initialized. timeout=%d min \n", timeout);
+
+ pc87413_enable();
+
+ return 0;
+}
+
+/**
+ * pc87413_exit: module's "destructor"
+ *
+ * Unload the watchdog. You cannot do this with any file handles open.
+ * If your watchdog is set to continue ticking on close and you unload
+ * it, well it keeps ticking. We won't get the interrupt but the board
+ * will not touch PC memory so all is fine. You just have to load a new
+ * module in 60 seconds or reboot.
+ */
+
+static void __exit pc87413_exit(void)
+{
+ /* Stop the timer before we leave */
+ if (!nowayout)
+ {
+ pc87413_disable();
+ printk(KERN_INFO MODNAME "Watchdog disabled.\n");
+ }
+
+ misc_deregister(&pc87413_miscdev);
+ unregister_reboot_notifier(&pc87413_notifier);
+ /* release_region(io,2); */
+
+ printk(MODNAME " watchdog component driver removed.\n");
+}
+
+module_init(pc87413_init);
+module_exit(pc87413_exit);
+
+MODULE_AUTHOR("Sven Anders <anders@anduras.de>, Marcus Junker <junker@anduras.de>,");
+MODULE_DESCRIPTION("PC87413 WDT driver");
+MODULE_LICENSE("GPL");
+
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
+module_param(io, int, 0);
+MODULE_PARM_DESC(io, MODNAME " I/O port (default: " __MODULE_STRING(io) ").");
+
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in minutes (default=" __MODULE_STRING(timeout) ").");
+
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)");
+
--- /dev/null
+/*
+ * Watchdog implementation for GPI h/w found on PMC-Sierra RM9xxx
+ * chips.
+ *
+ * Copyright (C) 2004 by Basler Vision Technologies AG
+ * Author: Thomas Koeller <thomas.koeller@baslerweb.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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/interrupt.h>
+#include <linux/fs.h>
+#include <linux/reboot.h>
+#include <linux/notifier.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <asm/io.h>
+#include <asm/atomic.h>
+#include <asm/processor.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/rm9k-ocd.h>
+
+#include <rm9k_wdt.h>
+
+
+#define CLOCK 125000000
+#define MAX_TIMEOUT_SECONDS 32
+#define CPCCR 0x0080
+#define CPGIG1SR 0x0044
+#define CPGIG1ER 0x0054
+
+
+/* Function prototypes */
+static irqreturn_t wdt_gpi_irqhdl(int, void *, struct pt_regs *);
+static void wdt_gpi_start(void);
+static void wdt_gpi_stop(void);
+static void wdt_gpi_set_timeout(unsigned int);
+static int wdt_gpi_open(struct inode *, struct file *);
+static int wdt_gpi_release(struct inode *, struct file *);
+static ssize_t wdt_gpi_write(struct file *, const char __user *, size_t, loff_t *);
+static long wdt_gpi_ioctl(struct file *, unsigned int, unsigned long);
+static int wdt_gpi_notify(struct notifier_block *, unsigned long, void *);
+static const struct resource *wdt_gpi_get_resource(struct platform_device *, const char *, unsigned int);
+static int __init wdt_gpi_probe(struct device *);
+static int __exit wdt_gpi_remove(struct device *);
+
+
+static const char wdt_gpi_name[] = "wdt_gpi";
+static atomic_t opencnt;
+static int expect_close;
+static int locked;
+
+
+/* These are set from device resources */
+static void __iomem * wd_regs;
+static unsigned int wd_irq, wd_ctr;
+
+
+/* Module arguments */
+static int timeout = MAX_TIMEOUT_SECONDS;
+module_param(timeout, int, 0444);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds");
+
+static unsigned long resetaddr = 0xbffdc200;
+module_param(resetaddr, ulong, 0444);
+MODULE_PARM_DESC(resetaddr, "Address to write to to force a reset");
+
+static unsigned long flagaddr = 0xbffdc104;
+module_param(flagaddr, ulong, 0444);
+MODULE_PARM_DESC(flagaddr, "Address to write to boot flags to");
+
+static int powercycle;
+module_param(powercycle, bool, 0444);
+MODULE_PARM_DESC(powercycle, "Cycle power if watchdog expires");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, bool, 0444);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be disabled once started");
+
+
+/* Interrupt handler */
+static irqreturn_t wdt_gpi_irqhdl(int irq, void *ctxt, struct pt_regs *regs)
+{
+ if (!unlikely(__raw_readl(wd_regs + 0x0008) & 0x1))
+ return IRQ_NONE;
+ __raw_writel(0x1, wd_regs + 0x0008);
+
+
+ printk(KERN_CRIT "%s: watchdog expired - resetting system\n",
+ wdt_gpi_name);
+
+ *(volatile char *) flagaddr |= 0x01;
+ *(volatile char *) resetaddr = powercycle ? 0x01 : 0x2;
+ iob();
+ while (1)
+ cpu_relax();
+}
+
+
+/* Watchdog functions */
+static void wdt_gpi_start(void)
+{
+ u32 reg;
+
+ lock_titan_regs();
+ reg = titan_readl(CPGIG1ER);
+ titan_writel(reg | (0x100 << wd_ctr), CPGIG1ER);
+ iob();
+ unlock_titan_regs();
+}
+
+static void wdt_gpi_stop(void)
+{
+ u32 reg;
+
+ lock_titan_regs();
+ reg = titan_readl(CPCCR) & ~(0xf << (wd_ctr * 4));
+ titan_writel(reg, CPCCR);
+ reg = titan_readl(CPGIG1ER);
+ titan_writel(reg & ~(0x100 << wd_ctr), CPGIG1ER);
+ iob();
+ unlock_titan_regs();
+}
+
+static void wdt_gpi_set_timeout(unsigned int to)
+{
+ u32 reg;
+ const u32 wdval = (to * CLOCK) & ~0x0000000f;
+
+ lock_titan_regs();
+ reg = titan_readl(CPCCR) & ~(0xf << (wd_ctr * 4));
+ titan_writel(reg, CPCCR);
+ wmb();
+ __raw_writel(wdval, wd_regs + 0x0000);
+ wmb();
+ titan_writel(reg | (0x2 << (wd_ctr * 4)), CPCCR);
+ wmb();
+ titan_writel(reg | (0x5 << (wd_ctr * 4)), CPCCR);
+ iob();
+ unlock_titan_regs();
+}
+
+
+/* /dev/watchdog operations */
+static int wdt_gpi_open(struct inode *inode, struct file *file)
+{
+ int res;
+
+ if (unlikely(atomic_dec_if_positive(&opencnt) < 0))
+ return -EBUSY;
+
+ expect_close = 0;
+ if (locked) {
+ module_put(THIS_MODULE);
+ free_irq(wd_irq, &miscdev);
+ locked = 0;
+ }
+
+ res = request_irq(wd_irq, wdt_gpi_irqhdl, SA_SHIRQ | SA_INTERRUPT,
+ wdt_gpi_name, &miscdev);
+ if (unlikely(res))
+ return res;
+
+ wdt_gpi_set_timeout(timeout);
+ wdt_gpi_start();
+
+ printk(KERN_INFO "%s: watchdog started, timeout = %u seconds\n",
+ wdt_gpi_name, timeout);
+ return nonseekable_open(inode, file);
+}
+
+static int wdt_gpi_release(struct inode *inode, struct file *file)
+{
+ if (nowayout) {
+ printk(KERN_INFO "%s: no way out - watchdog left running\n",
+ wdt_gpi_name);
+ __module_get(THIS_MODULE);
+ locked = 1;
+ } else {
+ if (expect_close) {
+ wdt_gpi_stop();
+ free_irq(wd_irq, &miscdev);
+ printk(KERN_INFO "%s: watchdog stopped\n", wdt_gpi_name);
+ } else {
+ printk(KERN_CRIT "%s: unexpected close() -"
+ " watchdog left running\n",
+ wdt_gpi_name);
+ wdt_gpi_set_timeout(timeout);
+ __module_get(THIS_MODULE);
+ locked = 1;
+ }
+ }
+
+ atomic_inc(&opencnt);
+ return 0;
+}
+
+static ssize_t
+wdt_gpi_write(struct file *f, const char __user *d, size_t s, loff_t *o)
+{
+ char val;
+
+ wdt_gpi_set_timeout(timeout);
+ expect_close = (s > 0) && !get_user(val, d) && (val == 'V');
+ return s ? 1 : 0;
+}
+
+static long
+wdt_gpi_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
+{
+ long res = -ENOTTY;
+ const long size = _IOC_SIZE(cmd);
+ int stat;
+ void __user *argp = (void __user *)arg;
+ static struct watchdog_info wdinfo = {
+ .identity = "RM9xxx/GPI watchdog",
+ .firmware_version = 0,
+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING
+ };
+
+ if (unlikely(_IOC_TYPE(cmd) != WATCHDOG_IOCTL_BASE))
+ return -ENOTTY;
+
+ if ((_IOC_DIR(cmd) & _IOC_READ)
+ && !access_ok(VERIFY_WRITE, arg, size))
+ return -EFAULT;
+
+ if ((_IOC_DIR(cmd) & _IOC_WRITE)
+ && !access_ok(VERIFY_READ, arg, size))
+ return -EFAULT;
+
+ expect_close = 0;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ wdinfo.options = nowayout ?
+ WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING :
+ WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE;
+ res = __copy_to_user(argp, &wdinfo, size) ? -EFAULT : size;
+ break;
+
+ case WDIOC_GETSTATUS:
+ break;
+
+ case WDIOC_GETBOOTSTATUS:
+ stat = (*(volatile char *) flagaddr & 0x01)
+ ? WDIOF_CARDRESET : 0;
+ res = __copy_to_user(argp, &stat, size) ?
+ -EFAULT : size;
+ break;
+
+ case WDIOC_SETOPTIONS:
+ break;
+
+ case WDIOC_KEEPALIVE:
+ wdt_gpi_set_timeout(timeout);
+ res = size;
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ {
+ int val;
+ if (unlikely(__copy_from_user(&val, argp, size))) {
+ res = -EFAULT;
+ break;
+ }
+
+ if (val > MAX_TIMEOUT_SECONDS)
+ val = MAX_TIMEOUT_SECONDS;
+ timeout = val;
+ wdt_gpi_set_timeout(val);
+ res = size;
+ printk(KERN_INFO "%s: timeout set to %u seconds\n",
+ wdt_gpi_name, timeout);
+ }
+ break;
+
+ case WDIOC_GETTIMEOUT:
+ res = __copy_to_user(argp, &timeout, size) ?
+ -EFAULT : size;
+ break;
+ }
+
+ return res;
+}
+
+
+/* Shutdown notifier */
+static int
+wdt_gpi_notify(struct notifier_block *this, unsigned long code, void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT)
+ wdt_gpi_stop();
+
+ return NOTIFY_DONE;
+}
+
+
+/* Kernel interfaces */
+static struct file_operations fops = {
+ .owner = THIS_MODULE,
+ .open = wdt_gpi_open,
+ .release = wdt_gpi_release,
+ .write = wdt_gpi_write,
+ .unlocked_ioctl = wdt_gpi_ioctl,
+};
+
+static struct miscdevice miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = wdt_gpi_name,
+ .fops = &fops,
+};
+
+static struct notifier_block wdt_gpi_shutdown = {
+ .notifier_call = wdt_gpi_notify,
+};
+
+
+/* Init & exit procedures */
+static const struct resource *
+wdt_gpi_get_resource(struct platform_device *pdv, const char *name,
+ unsigned int type)
+{
+ char buf[80];
+ if (snprintf(buf, sizeof buf, "%s_0", name) >= sizeof buf)
+ return NULL;
+ return platform_get_resource_byname(pdv, type, buf);
+}
+
+/* No hotplugging on the platform bus - use __init */
+static int __init wdt_gpi_probe(struct device *dev)
+{
+ int res;
+ struct platform_device * const pdv = to_platform_device(dev);
+ const struct resource
+ * const rr = wdt_gpi_get_resource(pdv, WDT_RESOURCE_REGS,
+ IORESOURCE_MEM),
+ * const ri = wdt_gpi_get_resource(pdv, WDT_RESOURCE_IRQ,
+ IORESOURCE_IRQ),
+ * const rc = wdt_gpi_get_resource(pdv, WDT_RESOURCE_COUNTER,
+ 0);
+
+ if (unlikely(!rr || !ri || !rc))
+ return -ENXIO;
+
+ wd_regs = ioremap_nocache(rr->start, rr->end + 1 - rr->start);
+ if (unlikely(!wd_regs))
+ return -ENOMEM;
+ wd_irq = ri->start;
+ wd_ctr = rc->start;
+ res = misc_register(&miscdev);
+ if (res)
+ iounmap(wd_regs);
+ else
+ register_reboot_notifier(&wdt_gpi_shutdown);
+ return res;
+}
+
+static int __exit wdt_gpi_remove(struct device *dev)
+{
+ int res;
+
+ unregister_reboot_notifier(&wdt_gpi_shutdown);
+ res = misc_deregister(&miscdev);
+ iounmap(wd_regs);
+ wd_regs = NULL;
+ return res;
+}
+
+
+/* Device driver init & exit */
+static struct device_driver wdt_gpi_driver = {
+ .name = (char *) wdt_gpi_name,
+ .bus = &platform_bus_type,
+ .owner = THIS_MODULE,
+ .probe = wdt_gpi_probe,
+ .remove = __exit_p(wdt_gpi_remove),
+ .shutdown = NULL,
+ .suspend = NULL,
+ .resume = NULL,
+};
+
+static int __init wdt_gpi_init_module(void)
+{
+ atomic_set(&opencnt, 1);
+ if (timeout > MAX_TIMEOUT_SECONDS)
+ timeout = MAX_TIMEOUT_SECONDS;
+ return driver_register(&wdt_gpi_driver);
+}
+
+static void __exit wdt_gpi_cleanup_module(void)
+{
+ driver_unregister(&wdt_gpi_driver);
+}
+
+module_init(wdt_gpi_init_module);
+module_exit(wdt_gpi_cleanup_module);
+
+MODULE_AUTHOR("Thomas Koeller <thomas.koeller@baslerweb.com>");
+MODULE_DESCRIPTION("Basler eXcite watchdog driver for gpi devices");
+MODULE_VERSION("0.1");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
projects / linux-drm-fsl-dcu.git / commitdiff