Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756271Ab2BAN1r (ORCPT ); Wed, 1 Feb 2012 08:27:47 -0500 Received: from metis.ext.pengutronix.de ([92.198.50.35]:55335 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754029Ab2BAN07 (ORCPT ); Wed, 1 Feb 2012 08:26:59 -0500 From: Sascha Hauer To: linux-kernel@vger.kernel.org Cc: Samuel Ortiz , Jean Delvare , linux-i2c@vger.kernel.org, linux-watchdog@vger.kernel.org, Ben Dooks , kernel@pengutronix.de, Sascha Hauer Subject: [PATCH 3/3] watchdog: Add Congatec CGEB watchdog driver Date: Wed, 1 Feb 2012 14:26:33 +0100 Message-Id: <1328102793-4313-4-git-send-email-s.hauer@pengutronix.de> X-Mailer: git-send-email 1.7.2.5 In-Reply-To: <1328102793-4313-1-git-send-email-s.hauer@pengutronix.de> References: <1328102793-4313-1-git-send-email-s.hauer@pengutronix.de> X-SA-Exim-Connect-IP: 2001:6f8:1178:2:219:66ff:fe5b:d076 X-SA-Exim-Mail-From: sha@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6753 Lines: 238 This driver provides support for the CGEB watchdog found on some Congatec x86 modules. Signed-off-by: Sascha Hauer --- drivers/watchdog/Kconfig | 9 ++ drivers/watchdog/Makefile | 1 + drivers/watchdog/congatec_cgeb_watchdog.c | 181 +++++++++++++++++++++++++++++ 3 files changed, 191 insertions(+), 0 deletions(-) create mode 100644 drivers/watchdog/congatec_cgeb_watchdog.c diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index 79fd606..a1f35a5 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -880,6 +880,15 @@ config SBC_EPX_C3_WATCHDOG To compile this driver as a module, choose M here: the module will be called sbc_epx_c3. +config CONGATEC_CGEB_WATCHDOG + tristate "Congatec CGEB watchdog" + ---help--- + This driver provides support for the watchdogs found on Congatec + modules with the CGEB BIOS interface. + + To compile this driver as a module, choose M here: the + module will be called congatec_cgeb_wdt. + # M32R Architecture # M68K Architecture diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile index fe893e9..d0b2f1d 100644 --- a/drivers/watchdog/Makefile +++ b/drivers/watchdog/Makefile @@ -107,6 +107,7 @@ obj-$(CONFIG_W83977F_WDT) += w83977f_wdt.o obj-$(CONFIG_MACHZ_WDT) += machzwd.o obj-$(CONFIG_SBC_EPX_C3_WATCHDOG) += sbc_epx_c3.o obj-$(CONFIG_INTEL_SCU_WATCHDOG) += intel_scu_watchdog.o +obj-$(CONFIG_CONGATEC_CGEB_WATCHDOG) += congatec_cgeb_watchdog.o # M32R Architecture diff --git a/drivers/watchdog/congatec_cgeb_watchdog.c b/drivers/watchdog/congatec_cgeb_watchdog.c new file mode 100644 index 0000000..a4be745 --- /dev/null +++ b/drivers/watchdog/congatec_cgeb_watchdog.c @@ -0,0 +1,181 @@ +/* + * CGEB watchdog driver + * + * (c) 2011 Sascha Hauer, Pengutronix + * + * 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; version 2 of the License. + * + * 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 +#include +#include +#include + +#define CGOS_WDOG_MODE_REBOOT_PC 0 +#define CGOS_WDOG_MODE_RESTART_OS 1 +#define CGOS_WDOG_MODE_STAGED 0x80 + +#define CGOS_WDOG_OPMODE_DISABLED 0 +#define CGOS_WDOG_OPMODE_ONETIME_TRIG 1 +#define CGOS_WDOG_OPMODE_SINGLE_EVENT 2 +#define CGOS_WDOG_OPMODE_EVENT_REPEAT 3 + +#define CGOS_WDOG_EVENT_INT 0 /* NMI/IRQ */ +#define CGOS_WDOG_EVENT_SCI 1 /* SMI/SCI */ +#define CGOS_WDOG_EVENT_RST 2 /* system reset */ +#define CGOS_WDOG_EVENT_BTN 3 /* power button */ + +#define CGOS_WDOG_EVENT_MAX_STAGES 3 + +struct cgeb_watchdog_stage { + unsigned long timeout; + unsigned long event; +}; + +struct cgeb_watchdog_config { + unsigned long size; + unsigned long timeout; /* not used in staged mode */ + unsigned long delay; + unsigned long mode; + /* optional parameters for staged watchdog */ + unsigned long op_mode; + unsigned long stage_count; + struct cgeb_watchdog_stage stages[CGOS_WDOG_EVENT_MAX_STAGES]; +}; + +struct cgeb_watchdog_priv { + struct cgeb_board_data *board; + struct watchdog_device wdd; + unsigned int timeout_s; + int unit; +}; + +static struct watchdog_info cgeb_wdd_info = { + .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING, + .firmware_version = 0, + .identity = "cgeb watchdog", +}; + +static unsigned int watchdog_set_config(struct cgeb_watchdog_priv *priv, + unsigned int timeout_s) +{ + struct cgeb_board_data *board = priv->board; + struct cgeb_watchdog_config wdi; + struct cgeb_function_parameters fps; + + memset(&wdi, 0, sizeof(wdi)); + memset(&fps, 0, sizeof(fps)); + + fps.unit = priv->unit; + fps.iptr = &wdi; + + wdi.timeout = timeout_s * 1000; + wdi.delay = 0; + wdi.size = sizeof(wdi); + wdi.mode = CGOS_WDOG_MODE_REBOOT_PC; + + return cgeb_call(board, &fps, CgebWDogSetConfig); +} + +static int cgeb_watchdog_start(struct watchdog_device *wdd) +{ + struct cgeb_watchdog_priv *priv = watchdog_get_drvdata(wdd); + + return watchdog_set_config(priv, priv->timeout_s); +} + +static int cgeb_watchdog_stop(struct watchdog_device *wdd) +{ + struct cgeb_watchdog_priv *priv = watchdog_get_drvdata(wdd); + + return watchdog_set_config(priv, 0); +} + +static int cgeb_watchdog_set_timeout(struct watchdog_device *wdd, + unsigned int timeout_s) +{ + struct cgeb_watchdog_priv *priv = watchdog_get_drvdata(wdd); + + if (!timeout_s) + return -EINVAL; + + priv->timeout_s = timeout_s; + + return 0; +} + +struct watchdog_ops cgeb_watchdog_ops = { + .start = cgeb_watchdog_start, + .stop = cgeb_watchdog_stop, + .set_timeout = cgeb_watchdog_set_timeout, +}; + +static int __devinit cgeb_watchdog_probe(struct platform_device *pdev) +{ + struct cgeb_watchdog_priv *priv; + struct cgeb_pdata *pdata = pdev->dev.platform_data; + int ret; + + dev_info(&pdev->dev, "registering\n"); + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->wdd.ops = &cgeb_watchdog_ops; + priv->wdd.info = &cgeb_wdd_info; + priv->wdd.min_timeout = 1; + priv->wdd.max_timeout = 3600; + priv->board = pdata->board; + priv->unit = pdata->unit; + + watchdog_set_drvdata(&priv->wdd, priv); + platform_set_drvdata(pdev, priv); + + ret = watchdog_register_device(&priv->wdd); + if (ret) + return ret; + + return 0; +} + +static int __devexit cgeb_watchdog_remove(struct platform_device *pdev) +{ + struct cgeb_watchdog_priv *priv = platform_get_drvdata(pdev); + + watchdog_unregister_device(&priv->wdd); + + return 0; +} + +static struct platform_driver cgeb_watchdog_driver = { + .probe = cgeb_watchdog_probe, + .remove = __exit_p(cgeb_watchdog_remove), + .driver = { + .name = "cgeb-watchdog", + .owner = THIS_MODULE, + }, +}; + +static int __init cgeb_watchdog_driver_init(void) +{ + return platform_driver_register(&cgeb_watchdog_driver); +} + +static void __exit cgeb_watchdog_driver_exit(void) +{ + platform_driver_unregister(&cgeb_watchdog_driver); +} + +module_init(cgeb_watchdog_driver_init); +module_exit(cgeb_watchdog_driver_exit); + +MODULE_AUTHOR("Sascha Hauer "); +MODULE_DESCRIPTION("cgeb watchdog driver"); +MODULE_LICENSE("GPL"); -- 1.7.2.5 -- 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/