From patchwork Wed Feb 24 22:46:03 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 81850 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o1OMkOjR002406 for ; Wed, 24 Feb 2010 22:46:24 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758520Ab0BXWqW (ORCPT ); Wed, 24 Feb 2010 17:46:22 -0500 Received: from smtp.nokia.com ([192.100.105.134]:39976 "EHLO mgw-mx09.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758491Ab0BXWqT (ORCPT ); Wed, 24 Feb 2010 17:46:19 -0500 Received: from esebh106.NOE.Nokia.com (esebh106.ntc.nokia.com [172.21.138.213]) by mgw-mx09.nokia.com (Switch-3.3.3/Switch-3.3.3) with ESMTP id o1OMkF5n022176; Wed, 24 Feb 2010 16:46:17 -0600 Received: from esebh102.NOE.Nokia.com ([172.21.138.183]) by esebh106.NOE.Nokia.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 25 Feb 2010 00:46:15 +0200 Received: from mgw-da02.ext.nokia.com ([147.243.128.26]) by esebh102.NOE.Nokia.com over TLS secured channel with Microsoft SMTPSVC(6.0.3790.3959); Thu, 25 Feb 2010 00:46:14 +0200 Received: from maxwell.research.nokia.com (maxwell.research.nokia.com [172.21.50.162]) by mgw-da02.ext.nokia.com (Switch-3.3.3/Switch-3.3.3) with ESMTP id o1OMk85q026151 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 25 Feb 2010 00:46:10 +0200 Received: from kaali.localdomain (kaali.localdomain [192.168.239.7]) by maxwell.research.nokia.com (Postfix) with ESMTPS id 42A0D70088; Thu, 25 Feb 2010 00:46:08 +0200 (EET) Received: from sailus by kaali.localdomain with local (Exim 4.69) (envelope-from ) id 1NkPzc-0001XT-2e; Thu, 25 Feb 2010 00:46:08 +0200 From: Sakari Ailus To: linux-media@vger.kernel.org Cc: hverkuil@xs4all.nl, laurent.pinchart@ideasonboard.com, david.cohen@nokia.com Subject: [PATCH v8 1/6] V4L: File handles Date: Thu, 25 Feb 2010 00:46:03 +0200 Message-Id: <1267051568-5757-1-git-send-email-sakari.ailus@maxwell.research.nokia.com> X-Mailer: git-send-email 1.5.6.5 In-Reply-To: <4B85AC1E.8060302@maxwell.research.nokia.com> References: <4B85AC1E.8060302@maxwell.research.nokia.com> X-OriginalArrivalTime: 24 Feb 2010 22:46:15.0405 (UTC) FILETIME=[2BE2A1D0:01CAB5A3] X-Nokia-AV: Clean Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Wed, 24 Feb 2010 22:46:24 +0000 (UTC) diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile index 5163289..14bf69a 100644 --- a/drivers/media/video/Makefile +++ b/drivers/media/video/Makefile @@ -10,7 +10,7 @@ stkwebcam-objs := stk-webcam.o stk-sensor.o omap2cam-objs := omap24xxcam.o omap24xxcam-dma.o -videodev-objs := v4l2-dev.o v4l2-ioctl.o v4l2-device.o +videodev-objs := v4l2-dev.o v4l2-ioctl.o v4l2-device.o v4l2-fh.o # V4L2 core modules diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c index 7090699..65a7b30 100644 --- a/drivers/media/video/v4l2-dev.c +++ b/drivers/media/video/v4l2-dev.c @@ -421,6 +421,10 @@ static int __video_register_device(struct video_device *vdev, int type, int nr, if (!vdev->release) return -EINVAL; + /* v4l2_fh support */ + spin_lock_init(&vdev->fh_lock); + INIT_LIST_HEAD(&vdev->fh_list); + /* Part 1: check device type */ switch (type) { case VFL_TYPE_GRABBER: diff --git a/drivers/media/video/v4l2-fh.c b/drivers/media/video/v4l2-fh.c new file mode 100644 index 0000000..93ea0af --- /dev/null +++ b/drivers/media/video/v4l2-fh.c @@ -0,0 +1,66 @@ +/* + * v4l2-fh.c + * + * V4L2 file handles. + * + * Copyright (C) 2009--2010 Nokia Corporation. + * + * Contact: Sakari Ailus + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +#include +#include +#include + +int v4l2_fh_init(struct v4l2_fh *fh, struct video_device *vdev) +{ + fh->vdev = vdev; + INIT_LIST_HEAD(&fh->list); + set_bit(V4L2_FL_USES_V4L2_FH, &fh->vdev->flags); + + return 0; +} +EXPORT_SYMBOL_GPL(v4l2_fh_init); + +void v4l2_fh_add(struct v4l2_fh *fh) +{ + unsigned long flags; + + spin_lock_irqsave(&fh->vdev->fh_lock, flags); + list_add(&fh->list, &fh->vdev->fh_list); + spin_unlock_irqrestore(&fh->vdev->fh_lock, flags); +} +EXPORT_SYMBOL_GPL(v4l2_fh_add); + +void v4l2_fh_del(struct v4l2_fh *fh) +{ + unsigned long flags; + + spin_lock_irqsave(&fh->vdev->fh_lock, flags); + list_del_init(&fh->list); + spin_unlock_irqrestore(&fh->vdev->fh_lock, flags); +} +EXPORT_SYMBOL_GPL(v4l2_fh_del); + +void v4l2_fh_exit(struct v4l2_fh *fh) +{ + if (fh->vdev == NULL) + return; + + fh->vdev = NULL; +} +EXPORT_SYMBOL_GPL(v4l2_fh_exit); diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h index 2dee938..bebe44b 100644 --- a/include/media/v4l2-dev.h +++ b/include/media/v4l2-dev.h @@ -32,6 +32,7 @@ struct v4l2_device; Drivers can clear this flag if they want to block all future device access. It is cleared by video_unregister_device. */ #define V4L2_FL_REGISTERED (0) +#define V4L2_FL_USES_V4L2_FH (1) struct v4l2_file_operations { struct module *owner; @@ -77,6 +78,10 @@ struct video_device /* attribute to differentiate multiple indices on one physical device */ int index; + /* V4L2 file handles */ + spinlock_t fh_lock; /* Lock for all v4l2_fhs */ + struct list_head fh_list; /* List of struct v4l2_fh */ + int debug; /* Activates debug level*/ /* Video standard vars */ diff --git a/include/media/v4l2-fh.h b/include/media/v4l2-fh.h new file mode 100644 index 0000000..410e86c --- /dev/null +++ b/include/media/v4l2-fh.h @@ -0,0 +1,42 @@ +/* + * v4l2-fh.h + * + * V4L2 file handle. + * + * Copyright (C) 2009--2010 Nokia Corporation. + * + * Contact: Sakari Ailus + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +#ifndef V4L2_FH_H +#define V4L2_FH_H + +#include + +struct video_device; + +struct v4l2_fh { + struct list_head list; + struct video_device *vdev; +}; + +int v4l2_fh_init(struct v4l2_fh *fh, struct video_device *vdev); +void v4l2_fh_add(struct v4l2_fh *fh); +void v4l2_fh_del(struct v4l2_fh *fh); +void v4l2_fh_exit(struct v4l2_fh *fh); + +#endif /* V4L2_EVENT_H */