From patchwork Sat Nov 21 11:16:37 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?TsODwqltZXRoIE3Dg8KhcnRvbg==?= X-Patchwork-Id: 61869 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id nALBGrLj011995 for ; Sat, 21 Nov 2009 11:16:53 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752775AbZKULQq (ORCPT ); Sat, 21 Nov 2009 06:16:46 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753505AbZKULQq (ORCPT ); Sat, 21 Nov 2009 06:16:46 -0500 Received: from mail01a.mail.t-online.hu ([84.2.40.6]:61746 "EHLO mail01a.mail.t-online.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752775AbZKULQo (ORCPT ); Sat, 21 Nov 2009 06:16:44 -0500 Received: from [192.168.1.64] (dsl51B6C41D.pool.t-online.hu [81.182.196.29]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail01a.mail.t-online.hu (Postfix) with ESMTPSA id 1541E79864B; Sat, 21 Nov 2009 12:15:53 +0100 (CET) Message-ID: <4B07CC15.9010005@freemail.hu> Date: Sat, 21 Nov 2009 12:16:37 +0100 From: =?ISO-8859-1?Q?N=E9meth_M=E1rton?= User-Agent: Mozilla/5.0 (X11; U; Linux i686; hu-HU; rv:1.8.1.21) Gecko/20090402 SeaMonkey/1.1.16 MIME-Version: 1.0 To: Jean-Francois Moine CC: Hans de Goede , linux-input@vger.kernel.org, V4L Mailing List Subject: Re: [RFC, PATCH 1/2] gspca: add input support for interrupt endpoints References: <4B04F7E0.1090803@freemail.hu> <4B05074B.1030407@redhat.com> <4B0641C2.1050200@freemail.hu> <20091120101951.720e5703@tele> In-Reply-To: <20091120101951.720e5703@tele> X-DCC-mail.t-online.hu-Metrics: mail01a.mail.t-online.hu 32711; Body=4 Fuz1=4 Fuz2=4 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org diff -r abfdd03b800d linux/drivers/media/video/gspca/Makefile --- a/linux/drivers/media/video/gspca/Makefile Thu Nov 19 10:34:21 2009 +0100 +++ b/linux/drivers/media/video/gspca/Makefile Sat Nov 21 13:02:41 2009 +0100 @@ -30,6 +30,9 @@ obj-$(CONFIG_USB_GSPCA_ZC3XX) += gspca_zc3xx.o gspca_main-objs := gspca.o +ifeq ($(CONFIG_INPUT),y) + gspca_main-objs += input.o +endif gspca_conex-objs := conex.o gspca_etoms-objs := etoms.o gspca_finepix-objs := finepix.o diff -r abfdd03b800d linux/drivers/media/video/gspca/gspca.c --- a/linux/drivers/media/video/gspca/gspca.c Thu Nov 19 10:34:21 2009 +0100 +++ b/linux/drivers/media/video/gspca/gspca.c Sat Nov 21 13:02:41 2009 +0100 @@ -41,6 +41,9 @@ #include "gspca.h" +#include +#include "input.h" + /* global values */ #define DEF_NURBS 3 /* default number of URBs */ #if DEF_NURBS > MAX_NURBS @@ -499,11 +502,13 @@ i, ep->desc.bEndpointAddress); gspca_dev->alt = i; /* memorize the current alt setting */ if (gspca_dev->nbalt > 1) { + gspca_input_destroy_urb(gspca_dev); ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i); if (ret < 0) { err("set alt %d err %d", i, ret); - return NULL; + ep = NULL; } + gspca_input_create_urb(gspca_dev); } return ep; } @@ -707,7 +712,9 @@ if (gspca_dev->sd_desc->stopN) gspca_dev->sd_desc->stopN(gspca_dev); destroy_urbs(gspca_dev); + gspca_input_destroy_urb(gspca_dev); gspca_set_alt0(gspca_dev); + gspca_input_create_urb(gspca_dev); } /* always call stop0 to free the subdriver's resources */ @@ -2088,6 +2095,11 @@ usb_set_intfdata(intf, gspca_dev); PDEBUG(D_PROBE, "/dev/video%d created", gspca_dev->vdev.num); + + ret = gspca_input_connect(gspca_dev); + if (0 <= ret) + ret = gspca_input_create_urb(gspca_dev); + return 0; out: kfree(gspca_dev->usb_buf); @@ -2105,6 +2117,7 @@ void gspca_disconnect(struct usb_interface *intf) { struct gspca_dev *gspca_dev = usb_get_intfdata(intf); + struct input_dev *input_dev; PDEBUG(D_PROBE, "/dev/video%d disconnect", gspca_dev->vdev.num); mutex_lock(&gspca_dev->usb_lock); @@ -2115,6 +2128,13 @@ wake_up_interruptible(&gspca_dev->wq); } + gspca_input_destroy_urb(gspca_dev); + input_dev = gspca_dev->input_dev; + if (input_dev) { + gspca_dev->input_dev = NULL; + input_unregister_device(input_dev); + } + /* the device is freed at exit of this function */ gspca_dev->dev = NULL; mutex_unlock(&gspca_dev->usb_lock); @@ -2140,6 +2160,7 @@ if (gspca_dev->sd_desc->stopN) gspca_dev->sd_desc->stopN(gspca_dev); destroy_urbs(gspca_dev); + gspca_input_destroy_urb(gspca_dev); gspca_set_alt0(gspca_dev); if (gspca_dev->sd_desc->stop0) gspca_dev->sd_desc->stop0(gspca_dev); @@ -2153,6 +2174,7 @@ gspca_dev->frozen = 0; gspca_dev->sd_desc->init(gspca_dev); + gspca_input_create_urb(gspca_dev); if (gspca_dev->streaming) return gspca_init_transfer(gspca_dev); return 0; diff -r abfdd03b800d linux/drivers/media/video/gspca/gspca.h --- a/linux/drivers/media/video/gspca/gspca.h Thu Nov 19 10:34:21 2009 +0100 +++ b/linux/drivers/media/video/gspca/gspca.h Sat Nov 21 13:02:41 2009 +0100 @@ -81,6 +81,9 @@ typedef void (*cam_pkt_op) (struct gspca_dev *gspca_dev, u8 *data, int len); +typedef int (*cam_int_pkt_op) (struct gspca_dev *gspca_dev, + u8 *data, + int len); struct ctrl { struct v4l2_queryctrl qctrl; @@ -116,6 +119,9 @@ cam_reg_op get_register; #endif cam_ident_op get_chip_ident; +#ifdef CONFIG_INPUT + cam_int_pkt_op int_pkt_scan; +#endif }; /* packet types when moving from iso buf to frame buf */ @@ -138,6 +144,10 @@ struct module *module; /* subdriver handling the device */ struct usb_device *dev; struct file *capt_file; /* file doing video capture */ +#ifdef CONFIG_INPUT + struct input_dev *input_dev; + char phys[64]; /* physical device path */ +#endif struct cam cam; /* device information */ const struct sd_desc *sd_desc; /* subdriver description */ @@ -147,6 +157,9 @@ #define USB_BUF_SZ 64 __u8 *usb_buf; /* buffer for USB exchanges */ struct urb *urb[MAX_NURBS]; +#ifdef CONFIG_INPUT + struct urb *int_urb; +#endif __u8 *frbuf; /* buffer for nframes */ struct gspca_frame frame[GSPCA_MAX_FRAMES]; diff -r abfdd03b800d linux/drivers/media/video/gspca/input.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/linux/drivers/media/video/gspca/input.c Sat Nov 21 13:02:41 2009 +0100 @@ -0,0 +1,174 @@ +/* + * Input handling for gspca USB camera drivers + * + * Copyright (C) 2009 Márton Németh + * + * 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 "gspca.h" +#include "input.h" + +#define MODULE_NAME "gspca_input" + + +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19) +static void int_irq(struct urb *urb, struct pt_regs *regs) +#else +static void int_irq(struct urb *urb) +#endif +{ + struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; + int ret; + + if (urb->status == 0) { + if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev, + urb->transfer_buffer, urb->actual_length) < 0) { + PDEBUG(D_ERR, "Unknown packet received"); + } + + ret = usb_submit_urb(urb, GFP_ATOMIC); + if (ret < 0) + PDEBUG(D_ERR, "Resubmit URB failed with error %i", ret); + } +} + +int gspca_input_connect(struct gspca_dev *dev) +{ + struct input_dev *input_dev; + int err = 0; + + dev->input_dev = NULL; + if (dev->sd_desc->int_pkt_scan) { + input_dev = input_allocate_device(); + if (!input_dev) + return -ENOMEM; + + usb_make_path(dev->dev, dev->phys, sizeof(dev->phys)); + strlcat(dev->phys, "/input0", sizeof(dev->phys)); + + input_dev->name = dev->sd_desc->name; + input_dev->phys = dev->phys; + + usb_to_input_id(dev->dev, &input_dev->id); + + input_dev->evbit[0] = BIT_MASK(EV_KEY); + input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA); + input_dev->dev.parent = &dev->dev->dev; + + err = input_register_device(input_dev); + if (err) { + PDEBUG(D_ERR, "Input device registration failed " + "with error %i", err); + input_dev->dev.parent = NULL; + input_free_device(input_dev); + } else { + dev->input_dev = input_dev; + } + } else + err = -EINVAL; + + return err; +} +EXPORT_SYMBOL(gspca_input_connect); + +static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev, + struct usb_endpoint_descriptor *ep) +{ + unsigned int buffer_len; + int interval; + struct urb *urb; + struct usb_device *dev; + void *buffer = NULL; + int ret = -EINVAL; + + buffer_len = ep->wMaxPacketSize; + interval = ep->bInterval; + PDEBUG(D_PROBE, "found int in endpoint: 0x%x, " + "buffer_len=%u, interval=%u", + ep->bEndpointAddress, buffer_len, interval); + + dev = gspca_dev->dev; + gspca_dev->int_urb = NULL; + + buffer = kmalloc(ep->wMaxPacketSize, GFP_KERNEL); + if (buffer) + urb = usb_alloc_urb(0, GFP_KERNEL); + else { + PDEBUG(D_ERR, "buffer allocation failed\n"); + kfree(buffer); + urb = NULL; + } + if (buffer && urb) { + usb_fill_int_urb(urb, dev, + usb_rcvintpipe(dev, ep->bEndpointAddress), + buffer, buffer_len, + int_irq, (void *)gspca_dev, interval); + gspca_dev->int_urb = urb; + ret = usb_submit_urb(urb, GFP_KERNEL); + if (ret < 0) + PDEBUG(D_ERR, "submit URB failed with error %i", ret); + } else + PDEBUG(D_ERR, "URB allocation failed"); + return ret; +} + +int gspca_input_create_urb(struct gspca_dev *gspca_dev) +{ + int ret = -EINVAL; + struct usb_interface *intf; + struct usb_host_interface *intf_desc; + struct usb_endpoint_descriptor *ep; + int i; + + if (gspca_dev->sd_desc->int_pkt_scan) { + intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); + intf_desc = intf->cur_altsetting; + for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { + ep = &intf_desc->endpoint[i].desc; + if ((ep->bEndpointAddress & USB_DIR_IN) && + ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) + == USB_ENDPOINT_XFER_INT)) { + + ret = alloc_and_submit_int_urb(gspca_dev, ep); + break; + } + } + } + return ret; +} +EXPORT_SYMBOL(gspca_input_create_urb); + +void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) +{ + struct urb *urb; + + urb = gspca_dev->int_urb; + if (urb) { + gspca_dev->int_urb = NULL; + usb_kill_urb(urb); + PDEBUG(D_PROBE, "Freeing buffer"); + usb_buffer_free(gspca_dev->dev, + urb->transfer_buffer_length, + urb->transfer_buffer, + urb->transfer_dma); + PDEBUG(D_PROBE, "Freeing URB"); + usb_free_urb(urb); + } +} +EXPORT_SYMBOL(gspca_input_destroy_urb); diff -r abfdd03b800d linux/drivers/media/video/gspca/input.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/linux/drivers/media/video/gspca/input.h Sat Nov 21 13:02:41 2009 +0100 @@ -0,0 +1,36 @@ +/* + * Input handling for gspca USB camera drivers + * + * Copyright (C) 2009 Márton Németh + * + * 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. + */ + +#ifndef GSPCA_INPUT_H +#define GSPCA_INPUT_H + +#include "gspca.h" + +#ifdef CONFIG_INPUT +int gspca_input_connect(struct gspca_dev *gspca_dev); +int gspca_input_create_urb(struct gspca_dev *gspca_dev); +void gspca_input_destroy_urb(struct gspca_dev *gspca_dev); +#else +#define gspca_input_connect(gspca_dev) 0 +#define gspca_input_create_urb(gspca_dev) 0 +#define gspca_input_destroy_urb(gspca_dev) +#endif + +#endif