Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754768AbYKZNou (ORCPT ); Wed, 26 Nov 2008 08:44:50 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754170AbYKZNna (ORCPT ); Wed, 26 Nov 2008 08:43:30 -0500 Received: from 81-174-11-161.static.ngi.it ([81.174.11.161]:54879 "EHLO mail.enneenne.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754121AbYKZNn0 (ORCPT ); Wed, 26 Nov 2008 08:43:26 -0500 From: Rodolfo Giometti To: linux-kernel@vger.kernel.org Cc: Andrew Morton , David Woodhouse , Dave Jones , Sam Ravnborg , Greg KH , Randy Dunlap , Kay Sievers , Alan Cox , "H. Peter Anvin" , Ingo Molnar , Michael Kerrisk , Rodolfo Giometti Date: Wed, 26 Nov 2008 14:42:44 +0100 Message-Id: <1227706969-20003-5-git-send-email-giometti@linux.it> X-Mailer: git-send-email 1.5.4.3 In-Reply-To: <1227706969-20003-4-git-send-email-giometti@linux.it> References: <> <1227706969-20003-1-git-send-email-giometti@linux.it> <1227706969-20003-2-git-send-email-giometti@linux.it> <1227706969-20003-3-git-send-email-giometti@linux.it> <1227706969-20003-4-git-send-email-giometti@linux.it> X-SA-Exim-Connect-IP: 192.168.32.254 X-SA-Exim-Mail-From: giometti@enneenne.com Subject: [PATCH 4/9] PPS: LinuxPPS clients support. X-SA-Exim-Version: 4.2.1 (built Tue, 09 Jan 2007 17:23:22 +0000) X-SA-Exim-Scanned: Yes (on mail.enneenne.com) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5791 Lines: 219 Each PPS source can be registered/deregistered into the system by using special modules called "clients". They simply define the PPS sources' attributes and implement the time signal registartion mechanism. This patch adds a special directory for such clients and adds a dummy client that can be useful to test system integrity on real systems. Signed-off-by: Rodolfo Giometti --- drivers/pps/Kconfig | 2 + drivers/pps/Makefile | 1 + drivers/pps/clients/Kconfig | 18 ++++++ drivers/pps/clients/Makefile | 9 +++ drivers/pps/clients/ktimer.c | 124 ++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 154 insertions(+), 0 deletions(-) create mode 100644 drivers/pps/clients/Kconfig create mode 100644 drivers/pps/clients/Makefile create mode 100644 drivers/pps/clients/ktimer.c diff --git a/drivers/pps/Kconfig b/drivers/pps/Kconfig index cc2eb8e..1afe4e0 100644 --- a/drivers/pps/Kconfig +++ b/drivers/pps/Kconfig @@ -30,4 +30,6 @@ config PPS_DEBUG messages to the system log. Select this if you are having a problem with PPS support and want to see more of what is going on. +source drivers/pps/clients/Kconfig + endmenu diff --git a/drivers/pps/Makefile b/drivers/pps/Makefile index 19ea582..98960dd 100644 --- a/drivers/pps/Makefile +++ b/drivers/pps/Makefile @@ -4,5 +4,6 @@ pps_core-y := pps.o kapi.o sysfs.o obj-$(CONFIG_PPS) := pps_core.o +obj-y += clients/ ccflags-$(CONFIG_PPS_DEBUG) := -DDEBUG diff --git a/drivers/pps/clients/Kconfig b/drivers/pps/clients/Kconfig new file mode 100644 index 0000000..60b83be --- /dev/null +++ b/drivers/pps/clients/Kconfig @@ -0,0 +1,18 @@ +# +# PPS clients configuration +# + +if PPS + +comment "PPS clients support" + +config PPS_CLIENT_KTIMER + tristate "Kernel timer client (Testing client, use for debug)" + help + If you say yes here you get support for a PPS debugging client + which uses a kernel timer to generate the PPS signal. + + This driver can also be built as a module. If so, the module + will be called ktimer.ko. + +endif diff --git a/drivers/pps/clients/Makefile b/drivers/pps/clients/Makefile new file mode 100644 index 0000000..f3c1e39 --- /dev/null +++ b/drivers/pps/clients/Makefile @@ -0,0 +1,9 @@ +# +# Makefile for PPS clients. +# + +obj-$(CONFIG_PPS_CLIENT_KTIMER) += ktimer.o + +ifeq ($(CONFIG_PPS_DEBUG),y) +EXTRA_CFLAGS += -DDEBUG +endif diff --git a/drivers/pps/clients/ktimer.c b/drivers/pps/clients/ktimer.c new file mode 100644 index 0000000..259baa7 --- /dev/null +++ b/drivers/pps/clients/ktimer.c @@ -0,0 +1,124 @@ +/* + * ktimer.c -- kernel timer test client + * + * + * Copyright (C) 2005-2006 Rodolfo Giometti + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + + +#include +#include +#include +#include +#include + +#include + +/* + * Global variables + */ + +static int source; +static struct timer_list ktimer; + +/* + * The kernel timer + */ + +static void pps_ktimer_event(unsigned long ptr) +{ + struct timespec __ts; + struct pps_ktime ts; + + /* First of all we get the time stamp... */ + getnstimeofday(&__ts); + + pr_info("PPS event at %lu\n", jiffies); + + /* ... and translate it to PPS time data struct */ + ts.sec = __ts.tv_sec; + ts.nsec = __ts.tv_nsec; + + pps_event(source, &ts, PPS_CAPTUREASSERT, NULL); + + mod_timer(&ktimer, jiffies + HZ); +} + +/* + * The echo function + */ + +static void pps_ktimer_echo(int source, int event, void *data) +{ + pr_info("echo %s %s for source %d\n", + event & PPS_CAPTUREASSERT ? "assert" : "", + event & PPS_CAPTURECLEAR ? "clear" : "", + source); +} + +/* + * The PPS info struct + */ + +static struct pps_source_info pps_ktimer_info = { + .name = "ktimer", + .path = "", + .mode = PPS_CAPTUREASSERT | PPS_OFFSETASSERT | \ + PPS_ECHOASSERT | \ + PPS_CANWAIT | PPS_TSFMT_TSPEC, + .echo = pps_ktimer_echo, + .owner = THIS_MODULE, +}; + +/* + * Module staff + */ + +static void __exit pps_ktimer_exit(void) +{ + del_timer_sync(&ktimer); + pps_unregister_source(source); + + pr_info("ktimer PPS source unregistered\n"); +} + +static int __init pps_ktimer_init(void) +{ + int ret; + + ret = pps_register_source(&pps_ktimer_info, + PPS_CAPTUREASSERT | PPS_OFFSETASSERT); + if (ret < 0) { + printk(KERN_ERR "cannot register ktimer source\n"); + return ret; + } + source = ret; + + setup_timer(&ktimer, pps_ktimer_event, 0); + mod_timer(&ktimer, jiffies + HZ); + + pr_info("ktimer PPS source registered at %d\n", source); + + return 0; +} + +module_init(pps_ktimer_init); +module_exit(pps_ktimer_exit); + +MODULE_AUTHOR("Rodolfo Giometti "); +MODULE_DESCRIPTION("dummy PPS source by using a kernel timer (just for debug)"); +MODULE_LICENSE("GPL"); -- 1.5.4.3 -- 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/