mirror of
https://github.com/adulau/aha.git
synced 2024-12-28 03:36:19 +00:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog: [WATCHDOG] Pika Warp appliance watchdog timer [WATCHDOG] Enable watchdog timer on GE Fanuc's SBC610 [WATCHDOG] Basic support for GE Fanuc's FPGA based watchdog timer [WATCHDOG] wm8350: Fix section annotations
This commit is contained in:
Linus Torvalds
commit
87aa08b7fe
7 changed files with 666 additions and 3 deletions
|
|
@ -88,6 +88,21 @@
|
|||
compatible = "gef,fpga-regs";
|
||||
reg = <0x4 0x0 0x40>;
|
||||
};
|
||||
|
||||
wdt@4,2000 {
|
||||
compatible = "gef,fpga-wdt";
|
||||
reg = <0x4 0x2000 0x8>;
|
||||
interrupts = <0x1a 0x4>;
|
||||
interrupt-parent = <&gef_pic>;
|
||||
};
|
||||
/* Second watchdog available, driver currently supports one.
|
||||
wdt@4,2010 {
|
||||
compatible = "gef,fpga-wdt";
|
||||
reg = <0x4 0x2010 0x8>;
|
||||
interrupts = <0x1b 0x4>;
|
||||
interrupt-parent = <&gef_pic>;
|
||||
};
|
||||
*/
|
||||
gef_pic: pic@4,4000 {
|
||||
#interrupt-cells = <1>;
|
||||
interrupt-controller;
|
||||
|
|
|
|||
|
|
@ -1164,6 +1164,7 @@ CONFIG_WATCHDOG=y
|
|||
# CONFIG_SOFT_WATCHDOG is not set
|
||||
# CONFIG_ALIM7101_WDT is not set
|
||||
# CONFIG_8xxx_WDT is not set
|
||||
CONFIG_GEF_WDT=y
|
||||
|
||||
#
|
||||
# PCI-based Watchdog Cards
|
||||
|
|
|
|||
|
|
@ -770,6 +770,12 @@ config TXX9_WDT
|
|||
|
||||
# POWERPC Architecture
|
||||
|
||||
config GEF_WDT
|
||||
tristate "GE Fanuc Watchdog Timer"
|
||||
depends on GEF_SBC610
|
||||
---help---
|
||||
Watchdog timer found in a number of GE Fanuc single board computers.
|
||||
|
||||
config MPC5200_WDT
|
||||
tristate "MPC5200 Watchdog Timer"
|
||||
depends on PPC_MPC52xx
|
||||
|
|
@ -790,6 +796,14 @@ config MV64X60_WDT
|
|||
tristate "MV64X60 (Marvell Discovery) Watchdog Timer"
|
||||
depends on MV64X60
|
||||
|
||||
config PIKA_WDT
|
||||
tristate "PIKA FPGA Watchdog"
|
||||
depends on WARP
|
||||
default y
|
||||
help
|
||||
This enables the watchdog in the PIKA FPGA. Currently used on
|
||||
the Warp platform.
|
||||
|
||||
config BOOKE_WDT
|
||||
bool "PowerPC Book-E Watchdog Timer"
|
||||
depends on BOOKE || 4xx
|
||||
|
|
|
|||
|
|
@ -111,9 +111,11 @@ obj-$(CONFIG_TXX9_WDT) += txx9wdt.o
|
|||
# PARISC Architecture
|
||||
|
||||
# POWERPC Architecture
|
||||
obj-$(CONFIG_GEF_WDT) += gef_wdt.o
|
||||
obj-$(CONFIG_MPC5200_WDT) += mpc5200_wdt.o
|
||||
obj-$(CONFIG_8xxx_WDT) += mpc8xxx_wdt.o
|
||||
obj-$(CONFIG_MV64X60_WDT) += mv64x60_wdt.o
|
||||
obj-$(CONFIG_PIKA_WDT) += pika_wdt.o
|
||||
obj-$(CONFIG_BOOKE_WDT) += booke_wdt.o
|
||||
|
||||
# PPC64 Architecture
|
||||
|
|
|
|||
330
drivers/watchdog/gef_wdt.c
Normal file
330
drivers/watchdog/gef_wdt.c
Normal file
|
|
@ -0,0 +1,330 @@
|
|||
/*
|
||||
* GE Fanuc watchdog userspace interface
|
||||
*
|
||||
* Author: Martyn Welch <martyn.welch@gefanuc.com>
|
||||
*
|
||||
* Copyright 2008 GE Fanuc Intelligent Platforms Embedded Systems, Inc.
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* Based on: mv64x60_wdt.c (MV64X60 watchdog userspace interface)
|
||||
* Author: James Chapman <jchapman@katalix.com>
|
||||
*/
|
||||
|
||||
/* TODO:
|
||||
* This driver does not provide support for the hardwares capability of sending
|
||||
* an interrupt at a programmable threshold.
|
||||
*
|
||||
* This driver currently can only support 1 watchdog - there are 2 in the
|
||||
* hardware that this driver supports. Thus one could be configured as a
|
||||
* process-based watchdog (via /dev/watchdog), the second (using the interrupt
|
||||
* capabilities) a kernel-based watchdog.
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/compiler.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/miscdevice.h>
|
||||
#include <linux/watchdog.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/of_platform.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/uaccess.h>
|
||||
|
||||
#include <sysdev/fsl_soc.h>
|
||||
|
||||
/*
|
||||
* The watchdog configuration register contains a pair of 2-bit fields,
|
||||
* 1. a reload field, bits 27-26, which triggers a reload of
|
||||
* the countdown register, and
|
||||
* 2. an enable field, bits 25-24, which toggles between
|
||||
* enabling and disabling the watchdog timer.
|
||||
* Bit 31 is a read-only field which indicates whether the
|
||||
* watchdog timer is currently enabled.
|
||||
*
|
||||
* The low 24 bits contain the timer reload value.
|
||||
*/
|
||||
#define GEF_WDC_ENABLE_SHIFT 24
|
||||
#define GEF_WDC_SERVICE_SHIFT 26
|
||||
#define GEF_WDC_ENABLED_SHIFT 31
|
||||
|
||||
#define GEF_WDC_ENABLED_TRUE 1
|
||||
#define GEF_WDC_ENABLED_FALSE 0
|
||||
|
||||
/* Flags bits */
|
||||
#define GEF_WDOG_FLAG_OPENED 0
|
||||
|
||||
static unsigned long wdt_flags;
|
||||
static int wdt_status;
|
||||
static void __iomem *gef_wdt_regs;
|
||||
static int gef_wdt_timeout;
|
||||
static int gef_wdt_count;
|
||||
static unsigned int bus_clk;
|
||||
static char expect_close;
|
||||
static DEFINE_SPINLOCK(gef_wdt_spinlock);
|
||||
|
||||
static int nowayout = WATCHDOG_NOWAYOUT;
|
||||
module_param(nowayout, int, 0);
|
||||
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
|
||||
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
|
||||
|
||||
|
||||
static int gef_wdt_toggle_wdc(int enabled_predicate, int field_shift)
|
||||
{
|
||||
u32 data;
|
||||
u32 enabled;
|
||||
int ret = 0;
|
||||
|
||||
spin_lock(&gef_wdt_spinlock);
|
||||
data = ioread32be(gef_wdt_regs);
|
||||
enabled = (data >> GEF_WDC_ENABLED_SHIFT) & 1;
|
||||
|
||||
/* only toggle the requested field if enabled state matches predicate */
|
||||
if ((enabled ^ enabled_predicate) == 0) {
|
||||
/* We write a 1, then a 2 -- to the appropriate field */
|
||||
data = (1 << field_shift) | gef_wdt_count;
|
||||
iowrite32be(data, gef_wdt_regs);
|
||||
|
||||
data = (2 << field_shift) | gef_wdt_count;
|
||||
iowrite32be(data, gef_wdt_regs);
|
||||
ret = 1;
|
||||
}
|
||||
spin_unlock(&gef_wdt_spinlock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void gef_wdt_service(void)
|
||||
{
|
||||
gef_wdt_toggle_wdc(GEF_WDC_ENABLED_TRUE,
|
||||
GEF_WDC_SERVICE_SHIFT);
|
||||
}
|
||||
|
||||
static void gef_wdt_handler_enable(void)
|
||||
{
|
||||
if (gef_wdt_toggle_wdc(GEF_WDC_ENABLED_FALSE,
|
||||
GEF_WDC_ENABLE_SHIFT)) {
|
||||
gef_wdt_service();
|
||||
printk(KERN_NOTICE "gef_wdt: watchdog activated\n");
|
||||
}
|
||||
}
|
||||
|
||||
static void gef_wdt_handler_disable(void)
|
||||
{
|
||||
if (gef_wdt_toggle_wdc(GEF_WDC_ENABLED_TRUE,
|
||||
GEF_WDC_ENABLE_SHIFT))
|
||||
printk(KERN_NOTICE "gef_wdt: watchdog deactivated\n");
|
||||
}
|
||||
|
||||
static void gef_wdt_set_timeout(unsigned int timeout)
|
||||
{
|
||||
/* maximum bus cycle count is 0xFFFFFFFF */
|
||||
if (timeout > 0xFFFFFFFF / bus_clk)
|
||||
timeout = 0xFFFFFFFF / bus_clk;
|
||||
|
||||
/* Register only holds upper 24 bits, bit shifted into lower 24 */
|
||||
gef_wdt_count = (timeout * bus_clk) >> 8;
|
||||
gef_wdt_timeout = timeout;
|
||||
}
|
||||
|
||||
|
||||
static ssize_t gef_wdt_write(struct file *file, const char __user *data,
|
||||
size_t len, loff_t *ppos)
|
||||
{
|
||||
if (len) {
|
||||
if (!nowayout) {
|
||||
size_t i;
|
||||
|
||||
expect_close = 0;
|
||||
|
||||
for (i = 0; i != len; i++) {
|
||||
char c;
|
||||
if (get_user(c, data + i))
|
||||
return -EFAULT;
|
||||
if (c == 'V')
|
||||
expect_close = 42;
|
||||
}
|
||||
}
|
||||
gef_wdt_service();
|
||||
}
|
||||
|
||||
return len;
|
||||
}
|
||||
|
||||
static long gef_wdt_ioctl(struct file *file, unsigned int cmd,
|
||||
unsigned long arg)
|
||||
{
|
||||
int timeout;
|
||||
int options;
|
||||
void __user *argp = (void __user *)arg;
|
||||
static struct watchdog_info info = {
|
||||
.options = WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE |
|
||||
WDIOF_KEEPALIVEPING,
|
||||
.firmware_version = 0,
|
||||
.identity = "GE Fanuc watchdog",
|
||||
};
|
||||
|
||||
switch (cmd) {
|
||||
case WDIOC_GETSUPPORT:
|
||||
if (copy_to_user(argp, &info, sizeof(info)))
|
||||
return -EFAULT;
|
||||
break;
|
||||
|
||||
case WDIOC_GETSTATUS:
|
||||
case WDIOC_GETBOOTSTATUS:
|
||||
if (put_user(wdt_status, (int __user *)argp))
|
||||
return -EFAULT;
|
||||
wdt_status &= ~WDIOF_KEEPALIVEPING;
|
||||
break;
|
||||
|
||||
case WDIOC_SETOPTIONS:
|
||||
if (get_user(options, (int __user *)argp))
|
||||
return -EFAULT;
|
||||
|
||||
if (options & WDIOS_DISABLECARD)
|
||||
gef_wdt_handler_disable();
|
||||
|
||||
if (options & WDIOS_ENABLECARD)
|
||||
gef_wdt_handler_enable();
|
||||
break;
|
||||
|
||||
case WDIOC_KEEPALIVE:
|
||||
gef_wdt_service();
|
||||
wdt_status |= WDIOF_KEEPALIVEPING;
|
||||
break;
|
||||
|
||||
case WDIOC_SETTIMEOUT:
|
||||
if (get_user(timeout, (int __user *)argp))
|
||||
return -EFAULT;
|
||||
gef_wdt_set_timeout(timeout);
|
||||
/* Fall through */
|
||||
|
||||
case WDIOC_GETTIMEOUT:
|
||||
if (put_user(gef_wdt_timeout, (int __user *)argp))
|
||||
return -EFAULT;
|
||||
break;
|
||||
|
||||
default:
|
||||
return -ENOTTY;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int gef_wdt_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
if (test_and_set_bit(GEF_WDOG_FLAG_OPENED, &wdt_flags))
|
||||
return -EBUSY;
|
||||
|
||||
if (nowayout)
|
||||
__module_get(THIS_MODULE);
|
||||
|
||||
gef_wdt_handler_enable();
|
||||
|
||||
return nonseekable_open(inode, file);
|
||||
}
|
||||
|
||||
static int gef_wdt_release(struct inode *inode, struct file *file)
|
||||
{
|
||||
if (expect_close == 42)
|
||||
gef_wdt_handler_disable();
|
||||
else {
|
||||
printk(KERN_CRIT
|
||||
"gef_wdt: unexpected close, not stopping timer!\n");
|
||||
gef_wdt_service();
|
||||
}
|
||||
expect_close = 0;
|
||||
|
||||
clear_bit(GEF_WDOG_FLAG_OPENED, &wdt_flags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct file_operations gef_wdt_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.llseek = no_llseek,
|
||||
.write = gef_wdt_write,
|
||||
.unlocked_ioctl = gef_wdt_ioctl,
|
||||
.open = gef_wdt_open,
|
||||
.release = gef_wdt_release,
|
||||
};
|
||||
|
||||
static struct miscdevice gef_wdt_miscdev = {
|
||||
.minor = WATCHDOG_MINOR,
|
||||
.name = "watchdog",
|
||||
.fops = &gef_wdt_fops,
|
||||
};
|
||||
|
||||
|
||||
static int __devinit gef_wdt_probe(struct of_device *dev,
|
||||
const struct of_device_id *match)
|
||||
{
|
||||
int timeout = 10;
|
||||
u32 freq;
|
||||
|
||||
bus_clk = 133; /* in MHz */
|
||||
|
||||
freq = fsl_get_sys_freq();
|
||||
if (freq > 0)
|
||||
bus_clk = freq;
|
||||
|
||||
/* Map devices registers into memory */
|
||||
gef_wdt_regs = of_iomap(dev->node, 0);
|
||||
if (gef_wdt_regs == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
gef_wdt_set_timeout(timeout);
|
||||
|
||||
gef_wdt_handler_disable(); /* in case timer was already running */
|
||||
|
||||
return misc_register(&gef_wdt_miscdev);
|
||||
}
|
||||
|
||||
static int __devexit gef_wdt_remove(struct platform_device *dev)
|
||||
{
|
||||
misc_deregister(&gef_wdt_miscdev);
|
||||
|
||||
gef_wdt_handler_disable();
|
||||
|
||||
iounmap(gef_wdt_regs);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id gef_wdt_ids[] = {
|
||||
{
|
||||
.compatible = "gef,fpga-wdt",
|
||||
},
|
||||
{},
|
||||
};
|
||||
|
||||
static struct of_platform_driver gef_wdt_driver = {
|
||||
.owner = THIS_MODULE,
|
||||
.name = "gef_wdt",
|
||||
.match_table = gef_wdt_ids,
|
||||
.probe = gef_wdt_probe,
|
||||
};
|
||||
|
||||
static int __init gef_wdt_init(void)
|
||||
{
|
||||
printk(KERN_INFO "GE Fanuc watchdog driver\n");
|
||||
return of_register_platform_driver(&gef_wdt_driver);
|
||||
}
|
||||
|
||||
static void __exit gef_wdt_exit(void)
|
||||
{
|
||||
of_unregister_platform_driver(&gef_wdt_driver);
|
||||
}
|
||||
|
||||
module_init(gef_wdt_init);
|
||||
module_exit(gef_wdt_exit);
|
||||
|
||||
MODULE_AUTHOR("Martyn Welch <martyn.welch@gefanuc.com>");
|
||||
MODULE_DESCRIPTION("GE Fanuc watchdog driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
|
||||
MODULE_ALIAS("platform: gef_wdt");
|
||||
301
drivers/watchdog/pika_wdt.c
Normal file
301
drivers/watchdog/pika_wdt.c
Normal file
|
|
@ -0,0 +1,301 @@
|
|||
/*
|
||||
* PIKA FPGA based Watchdog Timer
|
||||
*
|
||||
* Copyright (c) 2008 PIKA Technologies
|
||||
* Sean MacLennan <smaclennan@pikatech.com>
|
||||
*/
|
||||
|
||||
#include <linux/init.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/moduleparam.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/miscdevice.h>
|
||||
#include <linux/watchdog.h>
|
||||
#include <linux/reboot.h>
|
||||
#include <linux/jiffies.h>
|
||||
#include <linux/timer.h>
|
||||
#include <linux/bitops.h>
|
||||
#include <linux/uaccess.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/of_platform.h>
|
||||
|
||||
#define DRV_NAME "PIKA-WDT"
|
||||
#define PFX DRV_NAME ": "
|
||||
|
||||
/* Hardware timeout in seconds */
|
||||
#define WDT_HW_TIMEOUT 2
|
||||
|
||||
/* Timer heartbeat (500ms) */
|
||||
#define WDT_TIMEOUT (HZ/2)
|
||||
|
||||
/* User land timeout */
|
||||
#define WDT_HEARTBEAT 15
|
||||
static int heartbeat = WDT_HEARTBEAT;
|
||||
module_param(heartbeat, int, 0);
|
||||
MODULE_PARM_DESC(heartbeat, "Watchdog heartbeats in seconds. "
|
||||
"(default = " __MODULE_STRING(WDT_HEARTBEAT) ")");
|
||||
|
||||
static int nowayout = WATCHDOG_NOWAYOUT;
|
||||
module_param(nowayout, int, 0);
|
||||
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started "
|
||||
"(default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
|
||||
|
||||
static struct {
|
||||
void __iomem *fpga;
|
||||
unsigned long next_heartbeat; /* the next_heartbeat for the timer */
|
||||
unsigned long open;
|
||||
char expect_close;
|
||||
int bootstatus;
|
||||
struct timer_list timer; /* The timer that pings the watchdog */
|
||||
} pikawdt_private;
|
||||
|
||||
static struct watchdog_info ident = {
|
||||
.identity = DRV_NAME,
|
||||
.options = WDIOF_CARDRESET |
|
||||
WDIOF_SETTIMEOUT |
|
||||
WDIOF_KEEPALIVEPING |
|
||||
WDIOF_MAGICCLOSE,
|
||||
};
|
||||
|
||||
/*
|
||||
* Reload the watchdog timer. (ie, pat the watchdog)
|
||||
*/
|
||||
static inline void pikawdt_reset(void)
|
||||
{
|
||||
/* -- FPGA: Reset Control Register (32bit R/W) (Offset: 0x14) --
|
||||
* Bit 7, WTCHDG_EN: When set to 1, the watchdog timer is enabled.
|
||||
* Once enabled, it cannot be disabled. The watchdog can be
|
||||
* kicked by performing any write access to the reset
|
||||
* control register (this register).
|
||||
* Bit 8-11, WTCHDG_TIMEOUT_SEC: Sets the watchdog timeout value in
|
||||
* seconds. Valid ranges are 1 to 15 seconds. The value can
|
||||
* be modified dynamically.
|
||||
*/
|
||||
unsigned reset = in_be32(pikawdt_private.fpga + 0x14);
|
||||
/* enable with max timeout - 15 seconds */
|
||||
reset |= (1 << 7) + (WDT_HW_TIMEOUT << 8);
|
||||
out_be32(pikawdt_private.fpga + 0x14, reset);
|
||||
}
|
||||
|
||||
/*
|
||||
* Timer tick
|
||||
*/
|
||||
static void pikawdt_ping(unsigned long data)
|
||||
{
|
||||
if (time_before(jiffies, pikawdt_private.next_heartbeat) ||
|
||||
(!nowayout && !pikawdt_private.open)) {
|
||||
pikawdt_reset();
|
||||
mod_timer(&pikawdt_private.timer, jiffies + WDT_TIMEOUT);
|
||||
} else
|
||||
printk(KERN_CRIT PFX "I will reset your machine !\n");
|
||||
}
|
||||
|
||||
|
||||
static void pikawdt_keepalive(void)
|
||||
{
|
||||
pikawdt_private.next_heartbeat = jiffies + heartbeat * HZ;
|
||||
}
|
||||
|
||||
static void pikawdt_start(void)
|
||||
{
|
||||
pikawdt_keepalive();
|
||||
mod_timer(&pikawdt_private.timer, jiffies + WDT_TIMEOUT);
|
||||
}
|
||||
|
||||
/*
|
||||
* Watchdog device is opened, and watchdog starts running.
|
||||
*/
|
||||
static int pikawdt_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
/* /dev/watchdog can only be opened once */
|
||||
if (test_and_set_bit(0, &pikawdt_private.open))
|
||||
return -EBUSY;
|
||||
|
||||
pikawdt_start();
|
||||
|
||||
return nonseekable_open(inode, file);
|
||||
}
|
||||
|
||||
/*
|
||||
* Close the watchdog device.
|
||||
*/
|
||||
static int pikawdt_release(struct inode *inode, struct file *file)
|
||||
{
|
||||
/* stop internal ping */
|
||||
if (!pikawdt_private.expect_close)
|
||||
del_timer(&pikawdt_private.timer);
|
||||
|
||||
clear_bit(0, &pikawdt_private.open);
|
||||
pikawdt_private.expect_close = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Pat the watchdog whenever device is written to.
|
||||
*/
|
||||
static ssize_t pikawdt_write(struct file *file, const char __user *data,
|
||||
size_t len, loff_t *ppos)
|
||||
{
|
||||
if (!len)
|
||||
return 0;
|
||||
|
||||
/* Scan for magic character */
|
||||
if (!nowayout) {
|
||||
size_t i;
|
||||
|
||||
pikawdt_private.expect_close = 0;
|
||||
|
||||
for (i = 0; i < len; i++) {
|
||||
char c;
|
||||
if (get_user(c, data + i))
|
||||
return -EFAULT;
|
||||
if (c == 'V') {
|
||||
pikawdt_private.expect_close = 42;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pikawdt_keepalive();
|
||||
|
||||
return len;
|
||||
}
|
||||
|
||||
/*
|
||||
* Handle commands from user-space.
|
||||
*/
|
||||
static long pikawdt_ioctl(struct file *file,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
void __user *argp = (void __user *)arg;
|
||||
int __user *p = argp;
|
||||
int new_value;
|
||||
|
||||
switch (cmd) {
|
||||
case WDIOC_GETSUPPORT:
|
||||
return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
|
||||
|
||||
case WDIOC_GETSTATUS:
|
||||
return put_user(0, p);
|
||||
|
||||
case WDIOC_GETBOOTSTATUS:
|
||||
return put_user(pikawdt_private.bootstatus, p);
|
||||
|
||||
case WDIOC_KEEPALIVE:
|
||||
pikawdt_keepalive();
|
||||
return 0;
|
||||
|
||||
case WDIOC_SETTIMEOUT:
|
||||
if (get_user(new_value, p))
|
||||
return -EFAULT;
|
||||
|
||||
heartbeat = new_value;
|
||||
pikawdt_keepalive();
|
||||
|
||||
return put_user(new_value, p); /* return current value */
|
||||
|
||||
case WDIOC_GETTIMEOUT:
|
||||
return put_user(heartbeat, p);
|
||||
}
|
||||
return -ENOTTY;
|
||||
}
|
||||
|
||||
|
||||
static const struct file_operations pikawdt_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.llseek = no_llseek,
|
||||
.open = pikawdt_open,
|
||||
.release = pikawdt_release,
|
||||
.write = pikawdt_write,
|
||||
.unlocked_ioctl = pikawdt_ioctl,
|
||||
};
|
||||
|
||||
static struct miscdevice pikawdt_miscdev = {
|
||||
.minor = WATCHDOG_MINOR,
|
||||
.name = "watchdog",
|
||||
.fops = &pikawdt_fops,
|
||||
};
|
||||
|
||||
static int __init pikawdt_init(void)
|
||||
{
|
||||
struct device_node *np;
|
||||
void __iomem *fpga;
|
||||
static u32 post1;
|
||||
int ret;
|
||||
|
||||
np = of_find_compatible_node(NULL, NULL, "pika,fpga");
|
||||
if (np == NULL) {
|
||||
printk(KERN_ERR PFX "Unable to find fpga.\n");
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
pikawdt_private.fpga = of_iomap(np, 0);
|
||||
of_node_put(np);
|
||||
if (pikawdt_private.fpga == NULL) {
|
||||
printk(KERN_ERR PFX "Unable to map fpga.\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
ident.firmware_version = in_be32(pikawdt_private.fpga + 0x1c) & 0xffff;
|
||||
|
||||
/* POST information is in the sd area. */
|
||||
np = of_find_compatible_node(NULL, NULL, "pika,fpga-sd");
|
||||
if (np == NULL) {
|
||||
printk(KERN_ERR PFX "Unable to find fpga-sd.\n");
|
||||
ret = -ENOENT;
|
||||
goto out;
|
||||
}
|
||||
|
||||
fpga = of_iomap(np, 0);
|
||||
of_node_put(np);
|
||||
if (fpga == NULL) {
|
||||
printk(KERN_ERR PFX "Unable to map fpga-sd.\n");
|
||||
ret = -ENOMEM;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* -- FPGA: POST Test Results Register 1 (32bit R/W) (Offset: 0x4040) --
|
||||
* Bit 31, WDOG: Set to 1 when the last reset was caused by a watchdog
|
||||
* timeout.
|
||||
*/
|
||||
post1 = in_be32(fpga + 0x40);
|
||||
if (post1 & 0x80000000)
|
||||
pikawdt_private.bootstatus = WDIOF_CARDRESET;
|
||||
|
||||
iounmap(fpga);
|
||||
|
||||
setup_timer(&pikawdt_private.timer, pikawdt_ping, 0);
|
||||
|
||||
ret = misc_register(&pikawdt_miscdev);
|
||||
if (ret) {
|
||||
printk(KERN_ERR PFX "Unable to register miscdev.\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
|
||||
heartbeat, nowayout);
|
||||
return 0;
|
||||
|
||||
out:
|
||||
iounmap(pikawdt_private.fpga);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __exit pikawdt_exit(void)
|
||||
{
|
||||
misc_deregister(&pikawdt_miscdev);
|
||||
|
||||
iounmap(pikawdt_private.fpga);
|
||||
}
|
||||
|
||||
module_init(pikawdt_init);
|
||||
module_exit(pikawdt_exit);
|
||||
|
||||
MODULE_AUTHOR("Sean MacLennan <smaclennan@pikatech.com>");
|
||||
MODULE_DESCRIPTION("PIKA FPGA based Watchdog Timer");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
|
||||
|
||||
|
|
@ -279,7 +279,7 @@ static struct miscdevice wm8350_wdt_miscdev = {
|
|||
.fops = &wm8350_wdt_fops,
|
||||
};
|
||||
|
||||
static int wm8350_wdt_probe(struct platform_device *pdev)
|
||||
static int __devinit wm8350_wdt_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct wm8350 *wm8350 = platform_get_drvdata(pdev);
|
||||
|
||||
|
|
@ -296,7 +296,7 @@ static int wm8350_wdt_probe(struct platform_device *pdev)
|
|||
return misc_register(&wm8350_wdt_miscdev);
|
||||
}
|
||||
|
||||
static int __exit wm8350_wdt_remove(struct platform_device *pdev)
|
||||
static int __devexit wm8350_wdt_remove(struct platform_device *pdev)
|
||||
{
|
||||
misc_deregister(&wm8350_wdt_miscdev);
|
||||
|
||||
|
|
@ -305,7 +305,7 @@ static int __exit wm8350_wdt_remove(struct platform_device *pdev)
|
|||
|
||||
static struct platform_driver wm8350_wdt_driver = {
|
||||
.probe = wm8350_wdt_probe,
|
||||
.remove = wm8350_wdt_remove,
|
||||
.remove = __devexit_p(wm8350_wdt_remove),
|
||||
.driver = {
|
||||
.name = "wm8350-wdt",
|
||||
},
|
||||
|
|
|
|||
Loading…
Reference in a new issue