Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 11 Mar 2002 11:21:49 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 11 Mar 2002 11:21:42 -0500 Received: from [212.18.235.99] ([212.18.235.99]:25352 "EHLO street-vision.com") by vger.kernel.org with ESMTP id ; Mon, 11 Mar 2002 11:21:25 -0500 From: Justin Cormack Message-Id: <200203111621.g2BGLFT03840@street-vision.com> Subject: Re: Linux 2.4.19-pre2-ac4 To: alan@lxorguk.ukuu.org.uk Date: Mon, 11 Mar 2002 16:21:14 +0000 (GMT) Cc: linux-kernel@vger.kernel.org X-Mailer: ELM [version 2.5 PL3] MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > > Big flush of all the small changes in the pending queue. Various submissions > that didn't apply were simply discarded ok, here is a resubmit against pre2-ac4 for wafer5823wdt diff -urN linux-2.4.19-pre2-ac4-orig/Documentation/Configure.help linux-2.4.19-pre2-ac4/Documentation/Configure.help --- linux-2.4.19-pre2-ac4-orig/Documentation/Configure.help Sun Mar 10 16:30:02 2002 +++ linux-2.4.19-pre2-ac4/Documentation/Configure.help Sun Mar 10 16:44:36 2002 @@ -17897,6 +17897,17 @@ inserted in and removed from the running kernel whenever you want). The module is called shwdt.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. + +Wafer 5823 Watchdog +CONFIG_WAFER_WDT + This is a driver for the hardware watchdog on the ICP Wafer 5823 + Single Board Computer (and probably other similar models). + + This driver is also available as a module ( = code which can be + inserted in and removed from the running kernel whenever you want). + If you want to compile it as a module, say M here and read + . The module will be called + wafer5823wdt.o Machine Check Exception CONFIG_X86_MCE diff -urN linux-2.4.19-pre2-ac4-orig/drivers/char/Config.in linux-2.4.19-pre2-ac4/drivers/char/Config.in --- linux-2.4.19-pre2-ac4-orig/drivers/char/Config.in Sun Mar 10 16:30:03 2002 +++ linux-2.4.19-pre2-ac4/drivers/char/Config.in Sun Mar 10 16:38:41 2002 @@ -204,6 +204,7 @@ tristate ' W83877F (EMACS) Watchdog Timer' CONFIG_W83877F_WDT tristate ' AMD "Elan" SC520 Watchdog Timer' CONFIG_SC520_WDT tristate ' ZF MachZ Watchdog' CONFIG_MACHZ_WDT + tristate ' ICP ELectronics Wafer 5823 Watchdog' CONFIG_WAFER_WDT if [ "$CONFIG_SGI_IP22" = "y" ]; then dep_tristate ' Indy/I2 Hardware Watchdog' CONFIG_INDYDOG $CONFIG_SGI_IP22 fi diff -urN linux-2.4.19-pre2-ac4-orig/drivers/char/Makefile linux-2.4.19-pre2-ac4/drivers/char/Makefile --- linux-2.4.19-pre2-ac4-orig/drivers/char/Makefile Sun Mar 10 16:30:03 2002 +++ linux-2.4.19-pre2-ac4/drivers/char/Makefile Sun Mar 10 18:58:28 2002 @@ -252,6 +252,7 @@ obj-$(CONFIG_EUROTECH_WDT) += eurotechwdt.o obj-$(CONFIG_INDYDOG) += indydog.o obj-$(CONFIG_SC1200_WDT) += sc1200wdt.o +obj-$(CONFIG_WAFER_WDT) += wafer5823wdt.o obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o subdir-$(CONFIG_MWAVE) += mwave diff -urN linux-2.4.19-pre2-ac4-orig/drivers/char/wafer5823wdt.c linux-2.4.19-pre2-ac4/drivers/char/wafer5823wdt.c --- linux-2.4.19-pre2-ac4-orig/drivers/char/wafer5823wdt.c Thu Jan 1 01:00:00 1970 +++ linux-2.4.19-pre2-ac4/drivers/char/wafer5823wdt.c Sun Mar 10 16:46:46 2002 @@ -0,0 +1,250 @@ +/* + * ICP Wafer 5823 Single Board Computer WDT driver for Linux 2.4.x + * http://www.icpamerica.com/wafer_5823.php + * May also work on other similar models + * + * (c) Copyright 2002 Justin Cormack + * + * Release 0.01 + * + * Based on advantechwdt.c which is based on wdt.c. + * Original copyright messages: + * + * (c) Copyright 1996-1997 Alan Cox , All Rights Reserved. + * http://www.redhat.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. + * + * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide + * warranty for any of this software. This material is provided + * "AS-IS" and at no charge. + * + * (c) Copyright 1995 Alan Cox + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static int wafwdt_is_open; +static spinlock_t wafwdt_lock; + +/* + * You must set these - there is no sane way to probe for this board. + * + * To enable, write the timeout value in seconds (1 to 255) to I/O + * port WDT_START, then read the port to start the watchdog. To pat + * the dog, read port WDT_STOP to stop the timer, then read WDT_START + * to restart it again. + */ + +#define WDT_START 0x443 +#define WDT_STOP 0x843 + +#define WD_TIMO 60 /* 1 minute */ + +/* + * Kernel methods. + */ + +static void +wafwdt_ping(void) +{ + /* pat watchdog */ + spin_lock(&wafwdt_lock); + inb_p(WDT_STOP); + inb_p(WDT_START); + spin_unlock(&wafwdt_lock); +} + +static void +wafwdt_start(void) +{ + /* start up watchdog */ + outb_p(WD_TIMO, WDT_START); + inb_p(WDT_START); +} + +static void +wafwdt_stop(void) +{ + /* stop watchdog */ + inb_p(WDT_STOP); +} + +static ssize_t +wafwdt_write(struct file *file, const char *buf, size_t count, loff_t * ppos) +{ + /* Can't seek (pwrite) on this device */ + if (ppos != &file->f_pos) + return -ESPIPE; + + if (count) { + wafwdt_ping(); + return 1; + } + return 0; +} + +static ssize_t +wafwdt_read(struct file *file, char *buf, size_t count, loff_t * ppos) +{ + return -EINVAL; +} + +static int +wafwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, + unsigned long arg) +{ + static struct watchdog_info ident = { + WDIOF_KEEPALIVEPING, 1, "Wafer 5823 WDT" + }; + + switch (cmd) { + case WDIOC_GETSUPPORT: + if (copy_to_user + ((struct watchdog_info *) arg, &ident, sizeof (ident))) + return -EFAULT; + break; + + case WDIOC_GETSTATUS: + if (copy_to_user((int *) arg, &wafwdt_is_open, sizeof (int))) + return -EFAULT; + break; + + case WDIOC_KEEPALIVE: + wafwdt_ping(); + break; + + default: + return -ENOTTY; + } + return 0; +} + +static int +wafwdt_open(struct inode *inode, struct file *file) +{ + switch (MINOR(inode->i_rdev)) { + case WATCHDOG_MINOR: + if (test_and_set_bit(0, &wafwdt_is_open)) + return -EBUSY; + wafwdt_start(); + return 0; + default: + return -ENODEV; + } +} + +static int +wafwdt_close(struct inode *inode, struct file *file) +{ + if (MINOR(inode->i_rdev) == WATCHDOG_MINOR) { +#ifndef CONFIG_WATCHDOG_NOWAYOUT + if (test_and_clear_bit(0, &wafwdt_is_open)) + wafwdt_stop(); +#else + wafwdt_is_open = 0; +#endif + } + return 0; +} + +/* + * Notifier for system down + */ + +static int +wafwdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused) +{ + if (code == SYS_DOWN || code == SYS_HALT) { + /* Turn the WDT off */ + wafwdt_stop(); + } + return NOTIFY_DONE; +} + +/* + * Kernel Interfaces + */ + +static struct file_operations wafwdt_fops = { + owner:THIS_MODULE, + read:wafwdt_read, + write:wafwdt_write, + ioctl:wafwdt_ioctl, + open:wafwdt_open, + release:wafwdt_close, +}; + +static struct miscdevice wafwdt_miscdev = { + WATCHDOG_MINOR, + "watchdog", + &wafwdt_fops +}; + +/* + * The WDT needs to learn about soft shutdowns in order to + * turn the timebomb registers off. + */ + +static struct notifier_block wafwdt_notifier = { + wafwdt_notify_sys, + NULL, + 0 +}; + +static int __init +wafwdt_init(void) +{ + printk + (KERN_INFO "WDT driver for Wafer 5823 single board computer initialising.\n"); + + spin_lock_init(&wafwdt_lock); + misc_register(&wafwdt_miscdev); +#if WDT_START != WDT_STOP + request_region(WDT_STOP, 1, "Wafer 5823 WDT"); +#endif + request_region(WDT_START, 1, "Wafer 5823 WDT"); + register_reboot_notifier(&wafwdt_notifier); + return 0; +} + +static void __exit +wafwdt_exit(void) +{ + misc_deregister(&wafwdt_miscdev); + unregister_reboot_notifier(&wafwdt_notifier); +#if WDT_START != WDT_STOP + release_region(WDT_STOP, 1); +#endif + release_region(WDT_START, 1); +} + +module_init(wafwdt_init); +module_exit(wafwdt_exit); + +MODULE_LICENSE("GPL"); + +/* end of wafer5823wdt.c */ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/