This patch adds a driver for the Zodiac Aerospace RAVE Watchdog Procesor. This device implements a watchdog timer, accessible over I2C.
This driver implements some functionality that isn't exposed via the standard API and so the driver functionality has also been exposed via sysfs. Signed-off-by: Martyn Welch <[email protected]> --- drivers/watchdog/Kconfig | 11 + drivers/watchdog/Makefile | 1 + drivers/watchdog/ziirave_wdt.c | 648 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 660 insertions(+) create mode 100644 drivers/watchdog/ziirave_wdt.c diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index 7a8a6c6..816b5fb 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -161,6 +161,17 @@ config XILINX_WATCHDOG To compile this driver as a module, choose M here: the module will be called of_xilinx_wdt. +config ZIIRAVE_WATCHDOG + tristate "Zodiac RAVE Watchdog Timer" + depends on I2C + select WATCHDOG_CORE + help + Watchdog driver for the Zodiac Aerospace RAVE Switch Watchdog + Processor. + + To compile this driver as a module, choose M here: the + module will be called ziirave_wdt. + # ALPHA Architecture # ARM Architecture diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile index 53d4827..05ba23a 100644 --- a/drivers/watchdog/Makefile +++ b/drivers/watchdog/Makefile @@ -190,5 +190,6 @@ obj-$(CONFIG_GPIO_WATCHDOG) += gpio_wdt.o obj-$(CONFIG_WM831X_WATCHDOG) += wm831x_wdt.o obj-$(CONFIG_WM8350_WATCHDOG) += wm8350_wdt.o obj-$(CONFIG_MAX63XX_WATCHDOG) += max63xx_wdt.o +obj-$(CONFIG_ZIIRAVE_WATCHDOG) += ziirave_wdt.o obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o obj-$(CONFIG_MENF21BMC_WATCHDOG) += menf21bmc_wdt.o diff --git a/drivers/watchdog/ziirave_wdt.c b/drivers/watchdog/ziirave_wdt.c new file mode 100644 index 0000000..7577c25 --- /dev/null +++ b/drivers/watchdog/ziirave_wdt.c @@ -0,0 +1,648 @@ +/* + * Copyright (C) 2015 Zodiac Inflight Innovations + * + * Author: Martyn Welch <[email protected]> + * + * Based on twl4030_wdt.c by Timo Kokkonen <timo.t.kokkonen at nokia.com>: + * + * Copyright (C) Nokia Corporation + * + * 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. + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/kernel.h> +#include <linux/watchdog.h> +#include <linux/i2c.h> +#include <linux/version.h> +#include <linux/sysfs.h> + +#define ZIIRAVE_TIMEOUT_MIN 3 +#define ZIIRAVE_TIMEOUT_DEFAULT 30 +#define ZIIRAVE_TIMEOUT_MAX 255 + +#define ZIIRAVE_PING_VALUE 0x0 +#define ZIIRAVE_RESET_VALUE 0x1 + +#define ZIIRAVE_STATE_INITIAL 0x0 +#define ZIIRAVE_STATE_OFF 0x1 +#define ZIIRAVE_STATE_ON 0x2 +#define ZIIRAVE_STATE_TRIGGERED 0x3 + +static char *ziirave_states[] = {"unconfigured", "disabled", "enabled", + "triggered"}; + +#define ZIIRAVE_REASON_POWER_UP 0x0 +#define ZIIRAVE_REASON_HW_WDT 0x1 +#define ZIIRAVE_REASON_HOST_REQ 0x4 +#define ZIIRAVE_REASON_IGL_CFG 0x6 +#define ZIIRAVE_REASON_IGL_INST 0x7 +#define ZIIRAVE_REASON_IGL_TRAP 0x8 +#define ZIIRAVE_REASON_UNKNOWN 0x9 + +static char *ziirave_reasons[] = {"power cycle", "triggered", "host request", + "illegal configuration", "illegal instruction", "illegal trap", + "unknown"}; + +#define ZIIRAVE_WDT_FIRM_VER_MAJOR 0x1 +#define ZIIRAVE_WDT_FIRM_VER_MINOR 0x2 +#define ZIIRAVE_WDT_BOOT_VER_MAJOR 0x3 +#define ZIIRAVE_WDT_BOOT_VER_MINOR 0x4 +#define ZIIRAVE_WDT_RESET_REASON 0x5 +#define ZIIRAVE_WDT_STATE 0x6 +#define ZIIRAVE_WDT_TIMEOUT 0x7 +#define ZIIRAVE_WDT_TIME_LEFT 0x8 +#define ZIIRAVE_WDT_PING 0x9 +#define ZIIRAVE_WDT_RESET_DURATION 0xa +#define ZIIRAVE_WDT_RESET_WDT 0xb +#define ZIIRAVE_WDT_GOTO_BOOTLOADER 0xc +#define ZIIRAVE_WDT_FORCE_RESET_HOST 0xd + +struct ziirave_wdt_rev { + unsigned char part; + unsigned char major; + unsigned char minor; +}; + +struct ziirave_wdt_data { + struct ziirave_wdt_rev bootloader_rev; + struct ziirave_wdt_rev firmware_rev; + int reset_reason; +}; + +static bool nowayout = WATCHDOG_NOWAYOUT; +module_param(nowayout, bool, 0); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started default=" + __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); + +static int ziirave_wdt_firmware_rev(struct watchdog_device *wdd, + struct ziirave_wdt_rev *rev) +{ + struct i2c_client *client = to_i2c_client(wdd->parent); + + rev->part = 2; + rev->major = (char)i2c_smbus_read_byte_data(client, + ZIIRAVE_WDT_FIRM_VER_MAJOR); + + rev->minor = (char)i2c_smbus_read_byte_data(client, + ZIIRAVE_WDT_FIRM_VER_MINOR); + + return 0; +} + +static int ziirave_wdt_bootloader_rev(struct watchdog_device *wdd, + struct ziirave_wdt_rev *rev) +{ + struct i2c_client *client = to_i2c_client(wdd->parent); + + rev->part = 1; + rev->major = (char)i2c_smbus_read_byte_data(client, + ZIIRAVE_WDT_BOOT_VER_MAJOR); + + rev->minor = (char)i2c_smbus_read_byte_data(client, + ZIIRAVE_WDT_BOOT_VER_MINOR); + + return 0; +} + +static int ziirave_wdt_reason(struct watchdog_device *wdd) +{ + struct i2c_client *client = to_i2c_client(wdd->parent); + + return i2c_smbus_read_byte_data(client, ZIIRAVE_WDT_RESET_REASON); +} + +static int ziirave_wdt_get_state(struct watchdog_device *wdd) +{ + struct i2c_client *client = to_i2c_client(wdd->parent); + + return i2c_smbus_read_byte_data(client, ZIIRAVE_WDT_STATE); +} + +static int ziirave_wdt_set_state(struct watchdog_device *wdd, int state) +{ + struct i2c_client *client = to_i2c_client(wdd->parent); + + return i2c_smbus_write_byte_data(client, ZIIRAVE_WDT_STATE, state); +} + +static int ziirave_wdt_start(struct watchdog_device *wdd) +{ + return ziirave_wdt_set_state(wdd, ZIIRAVE_STATE_ON); +} + +static int ziirave_wdt_stop(struct watchdog_device *wdd) +{ + return ziirave_wdt_set_state(wdd, ZIIRAVE_STATE_OFF); +} + +static int ziirave_wdt_ping(struct watchdog_device *wdd) +{ + struct i2c_client *client = to_i2c_client(wdd->parent); + + return i2c_smbus_write_byte_data(client, ZIIRAVE_WDT_PING, + ZIIRAVE_PING_VALUE); +} + +static int ziirave_wdt_get_timeout(struct watchdog_device *wdd) +{ + struct i2c_client *client = to_i2c_client(wdd->parent); + + return i2c_smbus_read_byte_data(client, ZIIRAVE_WDT_TIMEOUT); +} + +static int ziirave_wdt_set_timeout(struct watchdog_device *wdd, + unsigned int timeout) +{ + struct i2c_client *client = to_i2c_client(wdd->parent); + int ret; + + if (watchdog_timeout_invalid(wdd, timeout)) + return -EINVAL; + + ret = i2c_smbus_write_byte_data(client, ZIIRAVE_WDT_TIMEOUT, + (char)timeout); + if (!ret) + wdd->timeout = timeout; + + return ret; +} + +static unsigned int ziirave_wdt_get_timeleft(struct watchdog_device *wdd) +{ + struct i2c_client *client = to_i2c_client(wdd->parent); + + return i2c_smbus_read_byte_data(client, ZIIRAVE_WDT_TIME_LEFT); +} + +static int ziirave_wdt_set_resettime(struct watchdog_device *wdd, + unsigned int timeout) +{ + struct i2c_client *client = to_i2c_client(wdd->parent); + + if (timeout < 0 || timeout > 256) + return -EINVAL; + + return i2c_smbus_write_byte_data(client, ZIIRAVE_WDT_TIMEOUT, + (char)timeout); +} + +static unsigned int ziirave_wdt_get_resettime(struct watchdog_device *wdd) +{ + struct i2c_client *client = to_i2c_client(wdd->parent); + + return i2c_smbus_read_byte_data(client, ZIIRAVE_WDT_RESET_DURATION); +} + +static int ziirave_wdt_resetwdt(struct watchdog_device *wdd) +{ + struct i2c_client *client = to_i2c_client(wdd->parent); + + return i2c_smbus_write_byte_data(client, ZIIRAVE_WDT_RESET_WDT, 0x1); +} + +static int ziirave_wdt_resetwdt_bootloader(struct watchdog_device *wdd) +{ + struct i2c_client *client = to_i2c_client(wdd->parent); + + return i2c_smbus_write_byte_data(client, ZIIRAVE_WDT_GOTO_BOOTLOADER, + 0x1); +} + +static int ziirave_wdt_resethost(struct watchdog_device *wdd) +{ + struct i2c_client *client = to_i2c_client(wdd->parent); + + return i2c_smbus_write_byte_data(client, ZIIRAVE_WDT_FORCE_RESET_HOST, + 0x1); +} + +static const struct watchdog_info ziirave_wdt_info = { + .options = WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING, + .identity = "Zodiac RAVE Watchdog", +}; + +static const struct watchdog_ops ziirave_wdt_ops = { + .owner = THIS_MODULE, + .start = ziirave_wdt_start, + .stop = ziirave_wdt_stop, + .ping = ziirave_wdt_ping, + .set_timeout = ziirave_wdt_set_timeout, + .get_timeleft = ziirave_wdt_get_timeleft, +}; + +static ssize_t ziirave_wdt_sysfs_show_firm(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct i2c_client *client = to_i2c_client(dev->parent); + struct watchdog_device *wdd = i2c_get_clientdata(client); + struct ziirave_wdt_data *w_priv = watchdog_get_drvdata(wdd); + + return sprintf(buf, "%02u.%02u.%02u", w_priv->firmware_rev.part, + w_priv->firmware_rev.major, w_priv->firmware_rev.minor); +} + +static DEVICE_ATTR(firmware_version, S_IRUGO, ziirave_wdt_sysfs_show_firm, + NULL); + +static ssize_t ziirave_wdt_sysfs_show_boot(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct i2c_client *client = to_i2c_client(dev->parent); + struct watchdog_device *wdd = i2c_get_clientdata(client); + struct ziirave_wdt_data *w_priv = watchdog_get_drvdata(wdd); + + return sprintf(buf, "%02u.%02u.%02u", w_priv->bootloader_rev.part, + w_priv->bootloader_rev.major, + w_priv->bootloader_rev.minor); +} + +static DEVICE_ATTR(bootloader_version, S_IRUGO, ziirave_wdt_sysfs_show_boot, + NULL); + +static ssize_t ziirave_wdt_sysfs_show_reason(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct i2c_client *client = to_i2c_client(dev->parent); + struct watchdog_device *wdd = i2c_get_clientdata(client); + struct ziirave_wdt_data *w_priv = watchdog_get_drvdata(wdd); + + if ((w_priv->reset_reason < 0) || + (w_priv->reset_reason >= ARRAY_SIZE(ziirave_states))) + return sprintf(buf, "error"); + + return sprintf(buf, "%s", ziirave_reasons[w_priv->reset_reason]); +} + +static DEVICE_ATTR(reset_reason, S_IRUGO, ziirave_wdt_sysfs_show_reason, + NULL); + +static ssize_t ziirave_wdt_sysfs_store_state(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev->parent); + struct watchdog_device *wdd = i2c_get_clientdata(client); + int ret; + int state; + + if (!strcmp(buf, "enabled") || !strcmp(buf, "enabled\n")) + state = ZIIRAVE_STATE_ON; + else if (!strcmp(buf, "disabled") || !strcmp(buf, "disabled\n")) + state = ZIIRAVE_STATE_OFF; + else + return -EINVAL; + + mutex_lock(&wdd->lock); + + ret = ziirave_wdt_set_state(wdd, state); + if (ret) { + mutex_unlock(&wdd->lock); + return -EIO; + } + + if (state == ZIIRAVE_STATE_ON) + set_bit(WDOG_ACTIVE, &wdd->status); + else + clear_bit(WDOG_ACTIVE, &wdd->status); + + mutex_unlock(&wdd->lock); + + return count; +} + +static ssize_t ziirave_wdt_sysfs_show_state(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct i2c_client *client = to_i2c_client(dev->parent); + struct watchdog_device *wdd = i2c_get_clientdata(client); + int ret; + + ret = ziirave_wdt_get_state(wdd); + if (ret < 0) + return ret; + + if (ret >= ARRAY_SIZE(ziirave_states)) + return sprintf(buf, "Invalid"); + + return sprintf(buf, "%s", ziirave_states[ret]); +} + +static DEVICE_ATTR(state, S_IRUGO|S_IWUSR, + ziirave_wdt_sysfs_show_state, ziirave_wdt_sysfs_store_state); + +static ssize_t ziirave_wdt_sysfs_store_timeout(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev->parent); + struct watchdog_device *wdd = i2c_get_clientdata(client); + int ret; + int timeout; + + ret = kstrtouint(buf, 0, &timeout); + if (ret) + return ret; + + mutex_lock(&wdd->lock); + + ret = ziirave_wdt_set_timeout(wdd, timeout); + if (ret) { + mutex_unlock(&wdd->lock); + return ret; + } + + mutex_unlock(&wdd->lock); + + return count; +} + +static ssize_t ziirave_wdt_sysfs_show_timeout(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct i2c_client *client = to_i2c_client(dev->parent); + struct watchdog_device *wdd = i2c_get_clientdata(client); + int ret; + + ret = ziirave_wdt_get_timeout(wdd); + if (ret < 0) + return ret; + + return sprintf(buf, "%u", ret); +} + +static DEVICE_ATTR(timeout, S_IRUGO|S_IWUSR, + ziirave_wdt_sysfs_show_timeout, + ziirave_wdt_sysfs_store_timeout); + +static ssize_t ziirave_wdt_sysfs_show_timeleft(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct i2c_client *client = to_i2c_client(dev->parent); + struct watchdog_device *wdd = i2c_get_clientdata(client); + int ret; + + ret = ziirave_wdt_get_timeout(wdd); + if (ret < 0) + return ret; + + return sprintf(buf, "%u", ret); +} + +static DEVICE_ATTR(timeleft, S_IRUGO, + ziirave_wdt_sysfs_show_timeleft, NULL); + +static ssize_t ziirave_wdt_sysfs_store_pet(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev->parent); + struct watchdog_device *wdd = i2c_get_clientdata(client); + int ret; + + ret = ziirave_wdt_get_state(wdd); + if (ret != ZIIRAVE_STATE_ON) + return -EINVAL; + + ret = ziirave_wdt_ping(wdd); + if (ret) + return ret; + + return count; +} + +static DEVICE_ATTR(keepalive, S_IRUGO|S_IWUSR, NULL, + ziirave_wdt_sysfs_store_pet); + +static ssize_t ziirave_wdt_sysfs_store_reset_time(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev->parent); + struct watchdog_device *wdd = i2c_get_clientdata(client); + int ret; + int reset_time; + + ret = kstrtouint(buf, 0, &reset_time); + if (ret) + return ret; + + ret = ziirave_wdt_set_resettime(wdd, reset_time); + if (ret) + return ret; + + return count; +} + +static ssize_t ziirave_wdt_sysfs_show_reset_time(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct i2c_client *client = to_i2c_client(dev->parent); + struct watchdog_device *wdd = i2c_get_clientdata(client); + int ret; + + ret = ziirave_wdt_get_resettime(wdd); + if (ret < 0) + return ret; + + return sprintf(buf, "%u", ret); +} + +static DEVICE_ATTR(reset_duration, S_IRUGO|S_IWUSR, + ziirave_wdt_sysfs_show_reset_time, + ziirave_wdt_sysfs_store_reset_time); + +static ssize_t ziirave_wdt_sysfs_store_reset_processor(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev->parent); + struct watchdog_device *wdd = i2c_get_clientdata(client); + int ret; + + if (strcmp(buf, "reset") && strcmp(buf, "reset\n")) + return -EINVAL; + + ret = ziirave_wdt_resetwdt(wdd); + if (ret) + return ret; + + return count; +} + +static DEVICE_ATTR(reset_wdt, S_IRUGO|S_IWUSR, NULL, + ziirave_wdt_sysfs_store_reset_processor); + +static ssize_t ziirave_wdt_sysfs_store_wdt_to_bootloader( + struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev->parent); + struct watchdog_device *wdd = i2c_get_clientdata(client); + int ret; + + if (strcmp(buf, "reset") && strcmp(buf, "reset\n")) + return -EINVAL; + + ret = ziirave_wdt_resetwdt_bootloader(wdd); + if (ret) + return ret; + + return count; +} + +static DEVICE_ATTR(reset_bootloader, S_IRUGO|S_IWUSR, NULL, + ziirave_wdt_sysfs_store_wdt_to_bootloader); + +static ssize_t ziirave_wdt_sysfs_store_reset_host( + struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev->parent); + struct watchdog_device *wdd = i2c_get_clientdata(client); + int ret; + + if (strcmp(buf, "reset") && strcmp(buf, "reset\n")) + return -EINVAL; + + ret = ziirave_wdt_resethost(wdd); + if (ret) + return ret; + + return count; +} + +static DEVICE_ATTR(force_reset, S_IRUGO|S_IWUSR, NULL, + ziirave_wdt_sysfs_store_reset_host); + +static struct attribute *ziirave_wdt_attrs[] = { + &dev_attr_firmware_version.attr, + &dev_attr_bootloader_version.attr, + &dev_attr_reset_reason.attr, + &dev_attr_state.attr, + &dev_attr_timeout.attr, + &dev_attr_timeleft.attr, + &dev_attr_keepalive.attr, + &dev_attr_reset_duration.attr, + &dev_attr_reset_wdt.attr, + &dev_attr_reset_bootloader.attr, + &dev_attr_force_reset.attr, + NULL +}; + +static const struct attribute_group ziirave_wdt_sysfs_files = { + .attrs = ziirave_wdt_attrs, +}; + +static int ziirave_wdt_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int ret = 0; + struct watchdog_device *wdd; + struct ziirave_wdt_data *w_priv; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C + | I2C_FUNC_SMBUS_BYTE_DATA + | I2C_FUNC_SMBUS_READ_I2C_BLOCK)) + return -ENODEV; + + wdd = devm_kzalloc(&client->dev, sizeof(*wdd), GFP_KERNEL); + if (!wdd) + return -ENOMEM; + + w_priv = devm_kzalloc(&client->dev, sizeof(*w_priv), GFP_KERNEL); + if (!wdd) + return -ENOMEM; + + wdd->info = &ziirave_wdt_info; + wdd->ops = &ziirave_wdt_ops; + wdd->status = 0; + wdd->timeout = i2c_smbus_read_byte_data(client, ZIIRAVE_WDT_TIMEOUT); + wdd->min_timeout = ZIIRAVE_TIMEOUT_MIN; + wdd->max_timeout = ZIIRAVE_TIMEOUT_MAX; + wdd->parent = &client->dev; + + watchdog_set_nowayout(wdd, nowayout); + + i2c_set_clientdata(client, wdd); + + ziirave_wdt_stop(wdd); + + ret = watchdog_register_device(wdd); + if (ret) + return ret; + + ret = ziirave_wdt_firmware_rev(wdd, &w_priv->firmware_rev); + if (ret) + goto err; + + ret = ziirave_wdt_bootloader_rev(wdd, &w_priv->bootloader_rev); + if (ret) + goto err; + + w_priv->reset_reason = ziirave_wdt_reason(wdd); + if ((ret < 0) || (ret >= ARRAY_SIZE(ziirave_reasons))) + goto err; + + watchdog_set_drvdata(wdd, w_priv); + + ret = sysfs_create_group(&wdd->dev->kobj, &ziirave_wdt_sysfs_files); + if (ret) + goto err; + + return 0; +err: + watchdog_unregister_device(wdd); + + return ret; +} + +static int ziirave_wdt_remove(struct i2c_client *client) +{ + struct watchdog_device *wdd = i2c_get_clientdata(client); + + sysfs_remove_group(&client->dev.kobj, &ziirave_wdt_sysfs_files); + + watchdog_unregister_device(wdd); + + return 0; +} + +static struct i2c_device_id ziirave_wdt_id[] = { + { "ziirave-wdt", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, ziirave_wdt_id); + +static const struct of_device_id zrv_wdt_of_match[] = { + { .compatible = "zii,rave-wdt", }, + { }, +}; +MODULE_DEVICE_TABLE(of, zrv_wdt_of_match); + +static struct i2c_driver ziirave_wdt_driver = { + .driver = { + .name = "ziirave_wdt", + .of_match_table = zrv_wdt_of_match, + }, + .probe = ziirave_wdt_probe, + .remove = ziirave_wdt_remove, + .id_table = ziirave_wdt_id, +}; + +module_i2c_driver(ziirave_wdt_driver); + +MODULE_AUTHOR("Martyn Welch <[email protected]"); +MODULE_DESCRIPTION("Zodiac Aerospace RAVE Switch Watchdog Processor Driver"); +MODULE_LICENSE("GPL"); + -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
