f473bf76c7
The inode argument was never used. Removing it from video_usercopy brings the function pointer type of video_usercopy in line with similar v4l2 functions, thus simplifying several drivers. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2085 lines
60 KiB
C
2085 lines
60 KiB
C
/* Linux driver for Philips webcam
|
|
USB and Video4Linux interface part.
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(C) 1999-2004 Nemosoft Unv.
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(C) 2004-2006 Luc Saillard (luc@saillard.org)
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|
|
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NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
|
|
driver and thus may have bugs that are not present in the original version.
|
|
Please send bug reports and support requests to <luc@saillard.org>.
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|
The decompression routines have been implemented by reverse-engineering the
|
|
Nemosoft binary pwcx module. Caveat emptor.
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|
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This program is free software; you can redistribute it and/or modify
|
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it under the terms of the GNU General Public License as published by
|
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the Free Software Foundation; either version 2 of the License, or
|
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(at your option) any later version.
|
|
|
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
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|
|
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You should have received a copy of the GNU General Public License
|
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along with this program; if not, write to the Free Software
|
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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|
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*/
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/*
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This code forms the interface between the USB layers and the Philips
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specific stuff. Some adanved stuff of the driver falls under an
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NDA, signed between me and Philips B.V., Eindhoven, the Netherlands, and
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is thus not distributed in source form. The binary pwcx.o module
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contains the code that falls under the NDA.
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In case you're wondering: 'pwc' stands for "Philips WebCam", but
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I really didn't want to type 'philips_web_cam' every time (I'm lazy as
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any Linux kernel hacker, but I don't like uncomprehensible abbreviations
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without explanation).
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Oh yes, convention: to disctinguish between all the various pointers to
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device-structures, I use these names for the pointer variables:
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udev: struct usb_device *
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vdev: struct video_device *
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pdev: struct pwc_devive *
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*/
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/* Contributors:
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- Alvarado: adding whitebalance code
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- Alistar Moire: QuickCam 3000 Pro device/product ID
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- Tony Hoyle: Creative Labs Webcam 5 device/product ID
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- Mark Burazin: solving hang in VIDIOCSYNC when camera gets unplugged
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- Jk Fang: Sotec Afina Eye ID
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- Xavier Roche: QuickCam Pro 4000 ID
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- Jens Knudsen: QuickCam Zoom ID
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- J. Debert: QuickCam for Notebooks ID
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*/
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/poll.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/version.h>
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#include <asm/io.h>
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#include "pwc.h"
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#include "pwc-kiara.h"
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#include "pwc-timon.h"
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#include "pwc-dec23.h"
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#include "pwc-dec1.h"
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#include "pwc-uncompress.h"
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/* Function prototypes and driver templates */
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/* hotplug device table support */
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static const struct usb_device_id pwc_device_table [] = {
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{ USB_DEVICE(0x0471, 0x0302) }, /* Philips models */
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{ USB_DEVICE(0x0471, 0x0303) },
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{ USB_DEVICE(0x0471, 0x0304) },
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{ USB_DEVICE(0x0471, 0x0307) },
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{ USB_DEVICE(0x0471, 0x0308) },
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{ USB_DEVICE(0x0471, 0x030C) },
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{ USB_DEVICE(0x0471, 0x0310) },
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{ USB_DEVICE(0x0471, 0x0311) }, /* Philips ToUcam PRO II */
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{ USB_DEVICE(0x0471, 0x0312) },
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{ USB_DEVICE(0x0471, 0x0313) }, /* the 'new' 720K */
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{ USB_DEVICE(0x0471, 0x0329) }, /* Philips SPC 900NC PC Camera */
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{ USB_DEVICE(0x069A, 0x0001) }, /* Askey */
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{ USB_DEVICE(0x046D, 0x08B0) }, /* Logitech QuickCam Pro 3000 */
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{ USB_DEVICE(0x046D, 0x08B1) }, /* Logitech QuickCam Notebook Pro */
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{ USB_DEVICE(0x046D, 0x08B2) }, /* Logitech QuickCam Pro 4000 */
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{ USB_DEVICE(0x046D, 0x08B3) }, /* Logitech QuickCam Zoom (old model) */
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{ USB_DEVICE(0x046D, 0x08B4) }, /* Logitech QuickCam Zoom (new model) */
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{ USB_DEVICE(0x046D, 0x08B5) }, /* Logitech QuickCam Orbit/Sphere */
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{ USB_DEVICE(0x046D, 0x08B6) }, /* Cisco VT Camera */
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{ USB_DEVICE(0x046D, 0x08B7) }, /* Logitech ViewPort AV 100 */
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{ USB_DEVICE(0x046D, 0x08B8) }, /* Logitech (reserved) */
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{ USB_DEVICE(0x055D, 0x9000) }, /* Samsung MPC-C10 */
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{ USB_DEVICE(0x055D, 0x9001) }, /* Samsung MPC-C30 */
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{ USB_DEVICE(0x055D, 0x9002) }, /* Samsung SNC-35E (Ver3.0) */
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{ USB_DEVICE(0x041E, 0x400C) }, /* Creative Webcam 5 */
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{ USB_DEVICE(0x041E, 0x4011) }, /* Creative Webcam Pro Ex */
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{ USB_DEVICE(0x04CC, 0x8116) }, /* Afina Eye */
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{ USB_DEVICE(0x06BE, 0x8116) }, /* new Afina Eye */
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{ USB_DEVICE(0x0d81, 0x1910) }, /* Visionite */
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{ USB_DEVICE(0x0d81, 0x1900) },
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{ }
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};
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MODULE_DEVICE_TABLE(usb, pwc_device_table);
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static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id *id);
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static void usb_pwc_disconnect(struct usb_interface *intf);
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static struct usb_driver pwc_driver = {
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.name = "Philips webcam", /* name */
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.id_table = pwc_device_table,
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.probe = usb_pwc_probe, /* probe() */
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.disconnect = usb_pwc_disconnect, /* disconnect() */
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};
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#define MAX_DEV_HINTS 20
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#define MAX_ISOC_ERRORS 20
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static int default_size = PSZ_QCIF;
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static int default_fps = 10;
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static int default_fbufs = 3; /* Default number of frame buffers */
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int pwc_mbufs = 2; /* Default number of mmap() buffers */
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#ifdef CONFIG_USB_PWC_DEBUG
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int pwc_trace = PWC_DEBUG_LEVEL;
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#endif
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static int power_save;
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static int led_on = 100, led_off; /* defaults to LED that is on while in use */
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static int pwc_preferred_compression = 1; /* 0..3 = uncompressed..high */
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static struct {
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int type;
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char serial_number[30];
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int device_node;
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struct pwc_device *pdev;
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} device_hint[MAX_DEV_HINTS];
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/***/
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static int pwc_video_open(struct inode *inode, struct file *file);
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static int pwc_video_close(struct inode *inode, struct file *file);
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static ssize_t pwc_video_read(struct file *file, char __user *buf,
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size_t count, loff_t *ppos);
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static unsigned int pwc_video_poll(struct file *file, poll_table *wait);
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static int pwc_video_ioctl(struct inode *inode, struct file *file,
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unsigned int ioctlnr, unsigned long arg);
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static int pwc_video_mmap(struct file *file, struct vm_area_struct *vma);
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static const struct file_operations pwc_fops = {
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.owner = THIS_MODULE,
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.open = pwc_video_open,
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.release = pwc_video_close,
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.read = pwc_video_read,
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.poll = pwc_video_poll,
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.mmap = pwc_video_mmap,
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.ioctl = pwc_video_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = v4l_compat_ioctl32,
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#endif
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.llseek = no_llseek,
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};
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static struct video_device pwc_template = {
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.name = "Philips Webcam", /* Filled in later */
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.release = video_device_release,
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.fops = &pwc_fops,
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.minor = -1,
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};
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/***************************************************************************/
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/* Okay, this is some magic that I worked out and the reasoning behind it...
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The biggest problem with any USB device is of course: "what to do
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when the user unplugs the device while it is in use by an application?"
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We have several options:
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1) Curse them with the 7 plagues when they do (requires divine intervention)
|
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2) Tell them not to (won't work: they'll do it anyway)
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3) Oops the kernel (this will have a negative effect on a user's uptime)
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4) Do something sensible.
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Of course, we go for option 4.
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It happens that this device will be linked to two times, once from
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usb_device and once from the video_device in their respective 'private'
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pointers. This is done when the device is probed() and all initialization
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succeeded. The pwc_device struct links back to both structures.
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When a device is unplugged while in use it will be removed from the
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list of known USB devices; I also de-register it as a V4L device, but
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unfortunately I can't free the memory since the struct is still in use
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by the file descriptor. This free-ing is then deferend until the first
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opportunity. Crude, but it works.
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A small 'advantage' is that if a user unplugs the cam and plugs it back
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in, it should get assigned the same video device minor, but unfortunately
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it's non-trivial to re-link the cam back to the video device... (that
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would surely be magic! :))
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*/
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/***************************************************************************/
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/* Private functions */
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/* Here we want the physical address of the memory.
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* This is used when initializing the contents of the area.
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*/
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static void *pwc_rvmalloc(unsigned long size)
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{
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void * mem;
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unsigned long adr;
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mem=vmalloc_32(size);
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if (!mem)
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return NULL;
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memset(mem, 0, size); /* Clear the ram out, no junk to the user */
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adr=(unsigned long) mem;
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while (size > 0)
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{
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SetPageReserved(vmalloc_to_page((void *)adr));
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adr += PAGE_SIZE;
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size -= PAGE_SIZE;
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}
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return mem;
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}
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static void pwc_rvfree(void * mem, unsigned long size)
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{
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unsigned long adr;
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if (!mem)
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return;
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adr=(unsigned long) mem;
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while ((long) size > 0)
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{
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ClearPageReserved(vmalloc_to_page((void *)adr));
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adr += PAGE_SIZE;
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size -= PAGE_SIZE;
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}
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vfree(mem);
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}
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static int pwc_allocate_buffers(struct pwc_device *pdev)
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{
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int i, err;
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void *kbuf;
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PWC_DEBUG_MEMORY(">> pwc_allocate_buffers(pdev = 0x%p)\n", pdev);
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if (pdev == NULL)
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return -ENXIO;
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/* Allocate Isochronuous pipe buffers */
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for (i = 0; i < MAX_ISO_BUFS; i++) {
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if (pdev->sbuf[i].data == NULL) {
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kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
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if (kbuf == NULL) {
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PWC_ERROR("Failed to allocate iso buffer %d.\n", i);
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return -ENOMEM;
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}
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PWC_DEBUG_MEMORY("Allocated iso buffer at %p.\n", kbuf);
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pdev->sbuf[i].data = kbuf;
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}
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}
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/* Allocate frame buffer structure */
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if (pdev->fbuf == NULL) {
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kbuf = kzalloc(default_fbufs * sizeof(struct pwc_frame_buf), GFP_KERNEL);
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if (kbuf == NULL) {
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PWC_ERROR("Failed to allocate frame buffer structure.\n");
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return -ENOMEM;
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}
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PWC_DEBUG_MEMORY("Allocated frame buffer structure at %p.\n", kbuf);
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pdev->fbuf = kbuf;
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}
|
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|
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/* create frame buffers, and make circular ring */
|
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for (i = 0; i < default_fbufs; i++) {
|
|
if (pdev->fbuf[i].data == NULL) {
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kbuf = vmalloc(PWC_FRAME_SIZE); /* need vmalloc since frame buffer > 128K */
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if (kbuf == NULL) {
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PWC_ERROR("Failed to allocate frame buffer %d.\n", i);
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return -ENOMEM;
|
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}
|
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PWC_DEBUG_MEMORY("Allocated frame buffer %d at %p.\n", i, kbuf);
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pdev->fbuf[i].data = kbuf;
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memset(kbuf, 0, PWC_FRAME_SIZE);
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}
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}
|
|
|
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/* Allocate decompressor table space */
|
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if (DEVICE_USE_CODEC1(pdev->type))
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err = pwc_dec1_alloc(pdev);
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else
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err = pwc_dec23_alloc(pdev);
|
|
|
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if (err) {
|
|
PWC_ERROR("Failed to allocate decompress table.\n");
|
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return err;
|
|
}
|
|
|
|
/* Allocate image buffer; double buffer for mmap() */
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kbuf = pwc_rvmalloc(pwc_mbufs * pdev->len_per_image);
|
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if (kbuf == NULL) {
|
|
PWC_ERROR("Failed to allocate image buffer(s). needed (%d)\n",
|
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pwc_mbufs * pdev->len_per_image);
|
|
return -ENOMEM;
|
|
}
|
|
PWC_DEBUG_MEMORY("Allocated image buffer at %p.\n", kbuf);
|
|
pdev->image_data = kbuf;
|
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for (i = 0; i < pwc_mbufs; i++) {
|
|
pdev->images[i].offset = i * pdev->len_per_image;
|
|
pdev->images[i].vma_use_count = 0;
|
|
}
|
|
for (; i < MAX_IMAGES; i++) {
|
|
pdev->images[i].offset = 0;
|
|
}
|
|
|
|
kbuf = NULL;
|
|
|
|
PWC_DEBUG_MEMORY("<< pwc_allocate_buffers()\n");
|
|
return 0;
|
|
}
|
|
|
|
static void pwc_free_buffers(struct pwc_device *pdev)
|
|
{
|
|
int i;
|
|
|
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PWC_DEBUG_MEMORY("Entering free_buffers(%p).\n", pdev);
|
|
|
|
if (pdev == NULL)
|
|
return;
|
|
/* Release Iso-pipe buffers */
|
|
for (i = 0; i < MAX_ISO_BUFS; i++)
|
|
if (pdev->sbuf[i].data != NULL) {
|
|
PWC_DEBUG_MEMORY("Freeing ISO buffer at %p.\n", pdev->sbuf[i].data);
|
|
kfree(pdev->sbuf[i].data);
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pdev->sbuf[i].data = NULL;
|
|
}
|
|
|
|
/* The same for frame buffers */
|
|
if (pdev->fbuf != NULL) {
|
|
for (i = 0; i < default_fbufs; i++) {
|
|
if (pdev->fbuf[i].data != NULL) {
|
|
PWC_DEBUG_MEMORY("Freeing frame buffer %d at %p.\n", i, pdev->fbuf[i].data);
|
|
vfree(pdev->fbuf[i].data);
|
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pdev->fbuf[i].data = NULL;
|
|
}
|
|
}
|
|
kfree(pdev->fbuf);
|
|
pdev->fbuf = NULL;
|
|
}
|
|
|
|
/* Intermediate decompression buffer & tables */
|
|
if (pdev->decompress_data != NULL) {
|
|
PWC_DEBUG_MEMORY("Freeing decompression buffer at %p.\n", pdev->decompress_data);
|
|
kfree(pdev->decompress_data);
|
|
pdev->decompress_data = NULL;
|
|
}
|
|
|
|
/* Release image buffers */
|
|
if (pdev->image_data != NULL) {
|
|
PWC_DEBUG_MEMORY("Freeing image buffer at %p.\n", pdev->image_data);
|
|
pwc_rvfree(pdev->image_data, pwc_mbufs * pdev->len_per_image);
|
|
}
|
|
pdev->image_data = NULL;
|
|
|
|
PWC_DEBUG_MEMORY("Leaving free_buffers().\n");
|
|
}
|
|
|
|
/* The frame & image buffer mess.
|
|
|
|
Yes, this is a mess. Well, it used to be simple, but alas... In this
|
|
module, 3 buffers schemes are used to get the data from the USB bus to
|
|
the user program. The first scheme involves the ISO buffers (called thus
|
|
since they transport ISO data from the USB controller), and not really
|
|
interesting. Suffices to say the data from this buffer is quickly
|
|
gathered in an interrupt handler (pwc_isoc_handler) and placed into the
|
|
frame buffer.
|
|
|
|
The frame buffer is the second scheme, and is the central element here.
|
|
It collects the data from a single frame from the camera (hence, the
|
|
name). Frames are delimited by the USB camera with a short USB packet,
|
|
so that's easy to detect. The frame buffers form a list that is filled
|
|
by the camera+USB controller and drained by the user process through
|
|
either read() or mmap().
|
|
|
|
The image buffer is the third scheme, in which frames are decompressed
|
|
and converted into planar format. For mmap() there is more than
|
|
one image buffer available.
|
|
|
|
The frame buffers provide the image buffering. In case the user process
|
|
is a bit slow, this introduces lag and some undesired side-effects.
|
|
The problem arises when the frame buffer is full. I used to drop the last
|
|
frame, which makes the data in the queue stale very quickly. But dropping
|
|
the frame at the head of the queue proved to be a litte bit more difficult.
|
|
I tried a circular linked scheme, but this introduced more problems than
|
|
it solved.
|
|
|
|
Because filling and draining are completely asynchronous processes, this
|
|
requires some fiddling with pointers and mutexes.
|
|
|
|
Eventually, I came up with a system with 2 lists: an 'empty' frame list
|
|
and a 'full' frame list:
|
|
* Initially, all frame buffers but one are on the 'empty' list; the one
|
|
remaining buffer is our initial fill frame.
|
|
* If a frame is needed for filling, we try to take it from the 'empty'
|
|
list, unless that list is empty, in which case we take the buffer at
|
|
the head of the 'full' list.
|
|
* When our fill buffer has been filled, it is appended to the 'full'
|
|
list.
|
|
* If a frame is needed by read() or mmap(), it is taken from the head of
|
|
the 'full' list, handled, and then appended to the 'empty' list. If no
|
|
buffer is present on the 'full' list, we wait.
|
|
The advantage is that the buffer that is currently being decompressed/
|
|
converted, is on neither list, and thus not in our way (any other scheme
|
|
I tried had the problem of old data lingering in the queue).
|
|
|
|
Whatever strategy you choose, it always remains a tradeoff: with more
|
|
frame buffers the chances of a missed frame are reduced. On the other
|
|
hand, on slower machines it introduces lag because the queue will
|
|
always be full.
|
|
*/
|
|
|
|
/**
|
|
\brief Find next frame buffer to fill. Take from empty or full list, whichever comes first.
|
|
*/
|
|
static int pwc_next_fill_frame(struct pwc_device *pdev)
|
|
{
|
|
int ret;
|
|
unsigned long flags;
|
|
|
|
ret = 0;
|
|
spin_lock_irqsave(&pdev->ptrlock, flags);
|
|
if (pdev->fill_frame != NULL) {
|
|
/* append to 'full' list */
|
|
if (pdev->full_frames == NULL) {
|
|
pdev->full_frames = pdev->fill_frame;
|
|
pdev->full_frames_tail = pdev->full_frames;
|
|
}
|
|
else {
|
|
pdev->full_frames_tail->next = pdev->fill_frame;
|
|
pdev->full_frames_tail = pdev->fill_frame;
|
|
}
|
|
}
|
|
if (pdev->empty_frames != NULL) {
|
|
/* We have empty frames available. That's easy */
|
|
pdev->fill_frame = pdev->empty_frames;
|
|
pdev->empty_frames = pdev->empty_frames->next;
|
|
}
|
|
else {
|
|
/* Hmm. Take it from the full list */
|
|
/* sanity check */
|
|
if (pdev->full_frames == NULL) {
|
|
PWC_ERROR("Neither empty or full frames available!\n");
|
|
spin_unlock_irqrestore(&pdev->ptrlock, flags);
|
|
return -EINVAL;
|
|
}
|
|
pdev->fill_frame = pdev->full_frames;
|
|
pdev->full_frames = pdev->full_frames->next;
|
|
ret = 1;
|
|
}
|
|
pdev->fill_frame->next = NULL;
|
|
spin_unlock_irqrestore(&pdev->ptrlock, flags);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
\brief Reset all buffers, pointers and lists, except for the image_used[] buffer.
|
|
|
|
If the image_used[] buffer is cleared too, mmap()/VIDIOCSYNC will run into trouble.
|
|
*/
|
|
static void pwc_reset_buffers(struct pwc_device *pdev)
|
|
{
|
|
int i;
|
|
unsigned long flags;
|
|
|
|
PWC_DEBUG_MEMORY(">> %s __enter__\n", __func__);
|
|
|
|
spin_lock_irqsave(&pdev->ptrlock, flags);
|
|
pdev->full_frames = NULL;
|
|
pdev->full_frames_tail = NULL;
|
|
for (i = 0; i < default_fbufs; i++) {
|
|
pdev->fbuf[i].filled = 0;
|
|
if (i > 0)
|
|
pdev->fbuf[i].next = &pdev->fbuf[i - 1];
|
|
else
|
|
pdev->fbuf->next = NULL;
|
|
}
|
|
pdev->empty_frames = &pdev->fbuf[default_fbufs - 1];
|
|
pdev->empty_frames_tail = pdev->fbuf;
|
|
pdev->read_frame = NULL;
|
|
pdev->fill_frame = pdev->empty_frames;
|
|
pdev->empty_frames = pdev->empty_frames->next;
|
|
|
|
pdev->image_read_pos = 0;
|
|
pdev->fill_image = 0;
|
|
spin_unlock_irqrestore(&pdev->ptrlock, flags);
|
|
|
|
PWC_DEBUG_MEMORY("<< %s __leaving__\n", __func__);
|
|
}
|
|
|
|
|
|
/**
|
|
\brief Do all the handling for getting one frame: get pointer, decompress, advance pointers.
|
|
*/
|
|
int pwc_handle_frame(struct pwc_device *pdev)
|
|
{
|
|
int ret = 0;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&pdev->ptrlock, flags);
|
|
/* First grab our read_frame; this is removed from all lists, so
|
|
we can release the lock after this without problems */
|
|
if (pdev->read_frame != NULL) {
|
|
/* This can't theoretically happen */
|
|
PWC_ERROR("Huh? Read frame still in use?\n");
|
|
spin_unlock_irqrestore(&pdev->ptrlock, flags);
|
|
return ret;
|
|
}
|
|
|
|
|
|
if (pdev->full_frames == NULL) {
|
|
PWC_ERROR("Woops. No frames ready.\n");
|
|
}
|
|
else {
|
|
pdev->read_frame = pdev->full_frames;
|
|
pdev->full_frames = pdev->full_frames->next;
|
|
pdev->read_frame->next = NULL;
|
|
}
|
|
|
|
if (pdev->read_frame != NULL) {
|
|
/* Decompression is a lengthy process, so it's outside of the lock.
|
|
This gives the isoc_handler the opportunity to fill more frames
|
|
in the mean time.
|
|
*/
|
|
spin_unlock_irqrestore(&pdev->ptrlock, flags);
|
|
ret = pwc_decompress(pdev);
|
|
spin_lock_irqsave(&pdev->ptrlock, flags);
|
|
|
|
/* We're done with read_buffer, tack it to the end of the empty buffer list */
|
|
if (pdev->empty_frames == NULL) {
|
|
pdev->empty_frames = pdev->read_frame;
|
|
pdev->empty_frames_tail = pdev->empty_frames;
|
|
}
|
|
else {
|
|
pdev->empty_frames_tail->next = pdev->read_frame;
|
|
pdev->empty_frames_tail = pdev->read_frame;
|
|
}
|
|
pdev->read_frame = NULL;
|
|
}
|
|
spin_unlock_irqrestore(&pdev->ptrlock, flags);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
\brief Advance pointers of image buffer (after each user request)
|
|
*/
|
|
void pwc_next_image(struct pwc_device *pdev)
|
|
{
|
|
pdev->image_used[pdev->fill_image] = 0;
|
|
pdev->fill_image = (pdev->fill_image + 1) % pwc_mbufs;
|
|
}
|
|
|
|
/**
|
|
* Print debug information when a frame is discarded because all of our buffer
|
|
* is full
|
|
*/
|
|
static void pwc_frame_dumped(struct pwc_device *pdev)
|
|
{
|
|
pdev->vframes_dumped++;
|
|
if (pdev->vframe_count < FRAME_LOWMARK)
|
|
return;
|
|
|
|
if (pdev->vframes_dumped < 20)
|
|
PWC_DEBUG_FLOW("Dumping frame %d\n", pdev->vframe_count);
|
|
else if (pdev->vframes_dumped == 20)
|
|
PWC_DEBUG_FLOW("Dumping frame %d (last message)\n",
|
|
pdev->vframe_count);
|
|
}
|
|
|
|
static int pwc_rcv_short_packet(struct pwc_device *pdev, const struct pwc_frame_buf *fbuf)
|
|
{
|
|
int awake = 0;
|
|
|
|
/* The ToUCam Fun CMOS sensor causes the firmware to send 2 or 3 bogus
|
|
frames on the USB wire after an exposure change. This conditition is
|
|
however detected in the cam and a bit is set in the header.
|
|
*/
|
|
if (pdev->type == 730) {
|
|
unsigned char *ptr = (unsigned char *)fbuf->data;
|
|
|
|
if (ptr[1] == 1 && ptr[0] & 0x10) {
|
|
PWC_TRACE("Hyundai CMOS sensor bug. Dropping frame.\n");
|
|
pdev->drop_frames += 2;
|
|
pdev->vframes_error++;
|
|
}
|
|
if ((ptr[0] ^ pdev->vmirror) & 0x01) {
|
|
if (ptr[0] & 0x01) {
|
|
pdev->snapshot_button_status = 1;
|
|
PWC_TRACE("Snapshot button pressed.\n");
|
|
}
|
|
else {
|
|
PWC_TRACE("Snapshot button released.\n");
|
|
}
|
|
}
|
|
if ((ptr[0] ^ pdev->vmirror) & 0x02) {
|
|
if (ptr[0] & 0x02)
|
|
PWC_TRACE("Image is mirrored.\n");
|
|
else
|
|
PWC_TRACE("Image is normal.\n");
|
|
}
|
|
pdev->vmirror = ptr[0] & 0x03;
|
|
/* Sometimes the trailer of the 730 is still sent as a 4 byte packet
|
|
after a short frame; this condition is filtered out specifically. A 4 byte
|
|
frame doesn't make sense anyway.
|
|
So we get either this sequence:
|
|
drop_bit set -> 4 byte frame -> short frame -> good frame
|
|
Or this one:
|
|
drop_bit set -> short frame -> good frame
|
|
So we drop either 3 or 2 frames in all!
|
|
*/
|
|
if (fbuf->filled == 4)
|
|
pdev->drop_frames++;
|
|
}
|
|
else if (pdev->type == 740 || pdev->type == 720) {
|
|
unsigned char *ptr = (unsigned char *)fbuf->data;
|
|
if ((ptr[0] ^ pdev->vmirror) & 0x01) {
|
|
if (ptr[0] & 0x01) {
|
|
pdev->snapshot_button_status = 1;
|
|
PWC_TRACE("Snapshot button pressed.\n");
|
|
}
|
|
else
|
|
PWC_TRACE("Snapshot button released.\n");
|
|
}
|
|
pdev->vmirror = ptr[0] & 0x03;
|
|
}
|
|
|
|
/* In case we were instructed to drop the frame, do so silently.
|
|
The buffer pointers are not updated either (but the counters are reset below).
|
|
*/
|
|
if (pdev->drop_frames > 0)
|
|
pdev->drop_frames--;
|
|
else {
|
|
/* Check for underflow first */
|
|
if (fbuf->filled < pdev->frame_total_size) {
|
|
PWC_DEBUG_FLOW("Frame buffer underflow (%d bytes);"
|
|
" discarded.\n", fbuf->filled);
|
|
pdev->vframes_error++;
|
|
}
|
|
else {
|
|
/* Send only once per EOF */
|
|
awake = 1; /* delay wake_ups */
|
|
|
|
/* Find our next frame to fill. This will always succeed, since we
|
|
* nick a frame from either empty or full list, but if we had to
|
|
* take it from the full list, it means a frame got dropped.
|
|
*/
|
|
if (pwc_next_fill_frame(pdev))
|
|
pwc_frame_dumped(pdev);
|
|
|
|
}
|
|
} /* !drop_frames */
|
|
pdev->vframe_count++;
|
|
return awake;
|
|
}
|
|
|
|
/* This gets called for the Isochronous pipe (video). This is done in
|
|
* interrupt time, so it has to be fast, not crash, and not stall. Neat.
|
|
*/
|
|
static void pwc_isoc_handler(struct urb *urb)
|
|
{
|
|
struct pwc_device *pdev;
|
|
int i, fst, flen;
|
|
int awake;
|
|
struct pwc_frame_buf *fbuf;
|
|
unsigned char *fillptr = NULL, *iso_buf = NULL;
|
|
|
|
awake = 0;
|
|
pdev = (struct pwc_device *)urb->context;
|
|
if (pdev == NULL) {
|
|
PWC_ERROR("isoc_handler() called with NULL device?!\n");
|
|
return;
|
|
}
|
|
|
|
if (urb->status == -ENOENT || urb->status == -ECONNRESET) {
|
|
PWC_DEBUG_OPEN("URB (%p) unlinked %ssynchronuously.\n", urb, urb->status == -ENOENT ? "" : "a");
|
|
return;
|
|
}
|
|
if (urb->status != -EINPROGRESS && urb->status != 0) {
|
|
const char *errmsg;
|
|
|
|
errmsg = "Unknown";
|
|
switch(urb->status) {
|
|
case -ENOSR: errmsg = "Buffer error (overrun)"; break;
|
|
case -EPIPE: errmsg = "Stalled (device not responding)"; break;
|
|
case -EOVERFLOW: errmsg = "Babble (bad cable?)"; break;
|
|
case -EPROTO: errmsg = "Bit-stuff error (bad cable?)"; break;
|
|
case -EILSEQ: errmsg = "CRC/Timeout (could be anything)"; break;
|
|
case -ETIME: errmsg = "Device does not respond"; break;
|
|
}
|
|
PWC_DEBUG_FLOW("pwc_isoc_handler() called with status %d [%s].\n", urb->status, errmsg);
|
|
/* Give up after a number of contiguous errors on the USB bus.
|
|
Appearantly something is wrong so we simulate an unplug event.
|
|
*/
|
|
if (++pdev->visoc_errors > MAX_ISOC_ERRORS)
|
|
{
|
|
PWC_INFO("Too many ISOC errors, bailing out.\n");
|
|
pdev->error_status = EIO;
|
|
awake = 1;
|
|
wake_up_interruptible(&pdev->frameq);
|
|
}
|
|
goto handler_end; // ugly, but practical
|
|
}
|
|
|
|
fbuf = pdev->fill_frame;
|
|
if (fbuf == NULL) {
|
|
PWC_ERROR("pwc_isoc_handler without valid fill frame.\n");
|
|
awake = 1;
|
|
goto handler_end;
|
|
}
|
|
else {
|
|
fillptr = fbuf->data + fbuf->filled;
|
|
}
|
|
|
|
/* Reset ISOC error counter. We did get here, after all. */
|
|
pdev->visoc_errors = 0;
|
|
|
|
/* vsync: 0 = don't copy data
|
|
1 = sync-hunt
|
|
2 = synched
|
|
*/
|
|
/* Compact data */
|
|
for (i = 0; i < urb->number_of_packets; i++) {
|
|
fst = urb->iso_frame_desc[i].status;
|
|
flen = urb->iso_frame_desc[i].actual_length;
|
|
iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
|
|
if (fst == 0) {
|
|
if (flen > 0) { /* if valid data... */
|
|
if (pdev->vsync > 0) { /* ...and we are not sync-hunting... */
|
|
pdev->vsync = 2;
|
|
|
|
/* ...copy data to frame buffer, if possible */
|
|
if (flen + fbuf->filled > pdev->frame_total_size) {
|
|
PWC_DEBUG_FLOW("Frame buffer overflow (flen = %d, frame_total_size = %d).\n", flen, pdev->frame_total_size);
|
|
pdev->vsync = 0; /* Hmm, let's wait for an EOF (end-of-frame) */
|
|
pdev->vframes_error++;
|
|
}
|
|
else {
|
|
memmove(fillptr, iso_buf, flen);
|
|
fillptr += flen;
|
|
}
|
|
}
|
|
fbuf->filled += flen;
|
|
} /* ..flen > 0 */
|
|
|
|
if (flen < pdev->vlast_packet_size) {
|
|
/* Shorter packet... We probably have the end of an image-frame;
|
|
wake up read() process and let select()/poll() do something.
|
|
Decompression is done in user time over there.
|
|
*/
|
|
if (pdev->vsync == 2) {
|
|
if (pwc_rcv_short_packet(pdev, fbuf)) {
|
|
awake = 1;
|
|
fbuf = pdev->fill_frame;
|
|
}
|
|
}
|
|
fbuf->filled = 0;
|
|
fillptr = fbuf->data;
|
|
pdev->vsync = 1;
|
|
}
|
|
|
|
pdev->vlast_packet_size = flen;
|
|
} /* ..status == 0 */
|
|
else {
|
|
/* This is normally not interesting to the user, unless
|
|
* you are really debugging something, default = 0 */
|
|
static int iso_error;
|
|
iso_error++;
|
|
if (iso_error < 20)
|
|
PWC_DEBUG_FLOW("Iso frame %d of USB has error %d\n", i, fst);
|
|
}
|
|
}
|
|
|
|
handler_end:
|
|
if (awake)
|
|
wake_up_interruptible(&pdev->frameq);
|
|
|
|
urb->dev = pdev->udev;
|
|
i = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (i != 0)
|
|
PWC_ERROR("Error (%d) re-submitting urb in pwc_isoc_handler.\n", i);
|
|
}
|
|
|
|
|
|
int pwc_isoc_init(struct pwc_device *pdev)
|
|
{
|
|
struct usb_device *udev;
|
|
struct urb *urb;
|
|
int i, j, ret;
|
|
|
|
struct usb_interface *intf;
|
|
struct usb_host_interface *idesc = NULL;
|
|
|
|
if (pdev == NULL)
|
|
return -EFAULT;
|
|
if (pdev->iso_init)
|
|
return 0;
|
|
pdev->vsync = 0;
|
|
udev = pdev->udev;
|
|
|
|
/* Get the current alternate interface, adjust packet size */
|
|
if (!udev->actconfig)
|
|
return -EFAULT;
|
|
intf = usb_ifnum_to_if(udev, 0);
|
|
if (intf)
|
|
idesc = usb_altnum_to_altsetting(intf, pdev->valternate);
|
|
|
|
if (!idesc)
|
|
return -EFAULT;
|
|
|
|
/* Search video endpoint */
|
|
pdev->vmax_packet_size = -1;
|
|
for (i = 0; i < idesc->desc.bNumEndpoints; i++) {
|
|
if ((idesc->endpoint[i].desc.bEndpointAddress & 0xF) == pdev->vendpoint) {
|
|
pdev->vmax_packet_size = le16_to_cpu(idesc->endpoint[i].desc.wMaxPacketSize);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (pdev->vmax_packet_size < 0 || pdev->vmax_packet_size > ISO_MAX_FRAME_SIZE) {
|
|
PWC_ERROR("Failed to find packet size for video endpoint in current alternate setting.\n");
|
|
return -ENFILE; /* Odd error, that should be noticeable */
|
|
}
|
|
|
|
/* Set alternate interface */
|
|
ret = 0;
|
|
PWC_DEBUG_OPEN("Setting alternate interface %d\n", pdev->valternate);
|
|
ret = usb_set_interface(pdev->udev, 0, pdev->valternate);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
for (i = 0; i < MAX_ISO_BUFS; i++) {
|
|
urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
|
|
if (urb == NULL) {
|
|
PWC_ERROR("Failed to allocate urb %d\n", i);
|
|
ret = -ENOMEM;
|
|
break;
|
|
}
|
|
pdev->sbuf[i].urb = urb;
|
|
PWC_DEBUG_MEMORY("Allocated URB at 0x%p\n", urb);
|
|
}
|
|
if (ret) {
|
|
/* De-allocate in reverse order */
|
|
while (i--) {
|
|
usb_free_urb(pdev->sbuf[i].urb);
|
|
pdev->sbuf[i].urb = NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* init URB structure */
|
|
for (i = 0; i < MAX_ISO_BUFS; i++) {
|
|
urb = pdev->sbuf[i].urb;
|
|
|
|
urb->interval = 1; // devik
|
|
urb->dev = udev;
|
|
urb->pipe = usb_rcvisocpipe(udev, pdev->vendpoint);
|
|
urb->transfer_flags = URB_ISO_ASAP;
|
|
urb->transfer_buffer = pdev->sbuf[i].data;
|
|
urb->transfer_buffer_length = ISO_BUFFER_SIZE;
|
|
urb->complete = pwc_isoc_handler;
|
|
urb->context = pdev;
|
|
urb->start_frame = 0;
|
|
urb->number_of_packets = ISO_FRAMES_PER_DESC;
|
|
for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
|
|
urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
|
|
urb->iso_frame_desc[j].length = pdev->vmax_packet_size;
|
|
}
|
|
}
|
|
|
|
/* link */
|
|
for (i = 0; i < MAX_ISO_BUFS; i++) {
|
|
ret = usb_submit_urb(pdev->sbuf[i].urb, GFP_KERNEL);
|
|
if (ret)
|
|
PWC_ERROR("isoc_init() submit_urb %d failed with error %d\n", i, ret);
|
|
else
|
|
PWC_DEBUG_MEMORY("URB 0x%p submitted.\n", pdev->sbuf[i].urb);
|
|
}
|
|
|
|
/* All is done... */
|
|
pdev->iso_init = 1;
|
|
PWC_DEBUG_OPEN("<< pwc_isoc_init()\n");
|
|
return 0;
|
|
}
|
|
|
|
static void pwc_iso_stop(struct pwc_device *pdev)
|
|
{
|
|
int i;
|
|
|
|
/* Unlinking ISOC buffers one by one */
|
|
for (i = 0; i < MAX_ISO_BUFS; i++) {
|
|
struct urb *urb;
|
|
|
|
urb = pdev->sbuf[i].urb;
|
|
if (urb) {
|
|
PWC_DEBUG_MEMORY("Unlinking URB %p\n", urb);
|
|
usb_kill_urb(urb);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void pwc_iso_free(struct pwc_device *pdev)
|
|
{
|
|
int i;
|
|
|
|
/* Freeing ISOC buffers one by one */
|
|
for (i = 0; i < MAX_ISO_BUFS; i++) {
|
|
struct urb *urb;
|
|
|
|
urb = pdev->sbuf[i].urb;
|
|
if (urb) {
|
|
PWC_DEBUG_MEMORY("Freeing URB\n");
|
|
usb_free_urb(urb);
|
|
pdev->sbuf[i].urb = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
void pwc_isoc_cleanup(struct pwc_device *pdev)
|
|
{
|
|
PWC_DEBUG_OPEN(">> pwc_isoc_cleanup()\n");
|
|
if (pdev == NULL)
|
|
return;
|
|
if (pdev->iso_init == 0)
|
|
return;
|
|
|
|
pwc_iso_stop(pdev);
|
|
pwc_iso_free(pdev);
|
|
|
|
/* Stop camera, but only if we are sure the camera is still there (unplug
|
|
is signalled by EPIPE)
|
|
*/
|
|
if (pdev->error_status && pdev->error_status != EPIPE) {
|
|
PWC_DEBUG_OPEN("Setting alternate interface 0.\n");
|
|
usb_set_interface(pdev->udev, 0, 0);
|
|
}
|
|
|
|
pdev->iso_init = 0;
|
|
PWC_DEBUG_OPEN("<< pwc_isoc_cleanup()\n");
|
|
}
|
|
|
|
int pwc_try_video_mode(struct pwc_device *pdev, int width, int height, int new_fps, int new_compression, int new_snapshot)
|
|
{
|
|
int ret, start;
|
|
|
|
/* Stop isoc stuff */
|
|
pwc_isoc_cleanup(pdev);
|
|
/* Reset parameters */
|
|
pwc_reset_buffers(pdev);
|
|
/* Try to set video mode... */
|
|
start = ret = pwc_set_video_mode(pdev, width, height, new_fps, new_compression, new_snapshot);
|
|
if (ret) {
|
|
PWC_DEBUG_FLOW("pwc_set_video_mode attempt 1 failed.\n");
|
|
/* That failed... restore old mode (we know that worked) */
|
|
start = pwc_set_video_mode(pdev, pdev->view.x, pdev->view.y, pdev->vframes, pdev->vcompression, pdev->vsnapshot);
|
|
if (start) {
|
|
PWC_DEBUG_FLOW("pwc_set_video_mode attempt 2 failed.\n");
|
|
}
|
|
}
|
|
if (start == 0)
|
|
{
|
|
if (pwc_isoc_init(pdev) < 0)
|
|
{
|
|
PWC_WARNING("Failed to restart ISOC transfers in pwc_try_video_mode.\n");
|
|
ret = -EAGAIN; /* let's try again, who knows if it works a second time */
|
|
}
|
|
}
|
|
pdev->drop_frames++; /* try to avoid garbage during switch */
|
|
return ret; /* Return original error code */
|
|
}
|
|
|
|
/*********
|
|
* sysfs
|
|
*********/
|
|
static struct pwc_device *cd_to_pwc(struct device *cd)
|
|
{
|
|
struct video_device *vdev = to_video_device(cd);
|
|
return video_get_drvdata(vdev);
|
|
}
|
|
|
|
static ssize_t show_pan_tilt(struct device *class_dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct pwc_device *pdev = cd_to_pwc(class_dev);
|
|
return sprintf(buf, "%d %d\n", pdev->pan_angle, pdev->tilt_angle);
|
|
}
|
|
|
|
static ssize_t store_pan_tilt(struct device *class_dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct pwc_device *pdev = cd_to_pwc(class_dev);
|
|
int pan, tilt;
|
|
int ret = -EINVAL;
|
|
|
|
if (strncmp(buf, "reset", 5) == 0)
|
|
ret = pwc_mpt_reset(pdev, 0x3);
|
|
|
|
else if (sscanf(buf, "%d %d", &pan, &tilt) > 0)
|
|
ret = pwc_mpt_set_angle(pdev, pan, tilt);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
return strlen(buf);
|
|
}
|
|
static DEVICE_ATTR(pan_tilt, S_IRUGO | S_IWUSR, show_pan_tilt,
|
|
store_pan_tilt);
|
|
|
|
static ssize_t show_snapshot_button_status(struct device *class_dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct pwc_device *pdev = cd_to_pwc(class_dev);
|
|
int status = pdev->snapshot_button_status;
|
|
pdev->snapshot_button_status = 0;
|
|
return sprintf(buf, "%d\n", status);
|
|
}
|
|
|
|
static DEVICE_ATTR(button, S_IRUGO | S_IWUSR, show_snapshot_button_status,
|
|
NULL);
|
|
|
|
static int pwc_create_sysfs_files(struct video_device *vdev)
|
|
{
|
|
struct pwc_device *pdev = video_get_drvdata(vdev);
|
|
int rc;
|
|
|
|
rc = device_create_file(&vdev->dev, &dev_attr_button);
|
|
if (rc)
|
|
goto err;
|
|
if (pdev->features & FEATURE_MOTOR_PANTILT) {
|
|
rc = device_create_file(&vdev->dev, &dev_attr_pan_tilt);
|
|
if (rc) goto err_button;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_button:
|
|
device_remove_file(&vdev->dev, &dev_attr_button);
|
|
err:
|
|
PWC_ERROR("Could not create sysfs files.\n");
|
|
return rc;
|
|
}
|
|
|
|
static void pwc_remove_sysfs_files(struct video_device *vdev)
|
|
{
|
|
struct pwc_device *pdev = video_get_drvdata(vdev);
|
|
if (pdev->features & FEATURE_MOTOR_PANTILT)
|
|
device_remove_file(&vdev->dev, &dev_attr_pan_tilt);
|
|
device_remove_file(&vdev->dev, &dev_attr_button);
|
|
}
|
|
|
|
#ifdef CONFIG_USB_PWC_DEBUG
|
|
static const char *pwc_sensor_type_to_string(unsigned int sensor_type)
|
|
{
|
|
switch(sensor_type) {
|
|
case 0x00:
|
|
return "Hyundai CMOS sensor";
|
|
case 0x20:
|
|
return "Sony CCD sensor + TDA8787";
|
|
case 0x2E:
|
|
return "Sony CCD sensor + Exas 98L59";
|
|
case 0x2F:
|
|
return "Sony CCD sensor + ADI 9804";
|
|
case 0x30:
|
|
return "Sharp CCD sensor + TDA8787";
|
|
case 0x3E:
|
|
return "Sharp CCD sensor + Exas 98L59";
|
|
case 0x3F:
|
|
return "Sharp CCD sensor + ADI 9804";
|
|
case 0x40:
|
|
return "UPA 1021 sensor";
|
|
case 0x100:
|
|
return "VGA sensor";
|
|
case 0x101:
|
|
return "PAL MR sensor";
|
|
default:
|
|
return "unknown type of sensor";
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/***************************************************************************/
|
|
/* Video4Linux functions */
|
|
|
|
static int pwc_video_open(struct inode *inode, struct file *file)
|
|
{
|
|
int i, ret;
|
|
struct video_device *vdev = video_devdata(file);
|
|
struct pwc_device *pdev;
|
|
|
|
PWC_DEBUG_OPEN(">> video_open called(vdev = 0x%p).\n", vdev);
|
|
|
|
pdev = video_get_drvdata(vdev);
|
|
BUG_ON(!pdev);
|
|
if (pdev->vopen) {
|
|
PWC_DEBUG_OPEN("I'm busy, someone is using the device.\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
mutex_lock(&pdev->modlock);
|
|
if (!pdev->usb_init) {
|
|
PWC_DEBUG_OPEN("Doing first time initialization.\n");
|
|
pdev->usb_init = 1;
|
|
|
|
/* Query sensor type */
|
|
ret = pwc_get_cmos_sensor(pdev, &i);
|
|
if (ret >= 0)
|
|
{
|
|
PWC_DEBUG_OPEN("This %s camera is equipped with a %s (%d).\n",
|
|
pdev->vdev->name,
|
|
pwc_sensor_type_to_string(i), i);
|
|
}
|
|
}
|
|
|
|
/* Turn on camera */
|
|
if (power_save) {
|
|
i = pwc_camera_power(pdev, 1);
|
|
if (i < 0)
|
|
PWC_DEBUG_OPEN("Failed to restore power to the camera! (%d)\n", i);
|
|
}
|
|
/* Set LED on/off time */
|
|
if (pwc_set_leds(pdev, led_on, led_off) < 0)
|
|
PWC_DEBUG_OPEN("Failed to set LED on/off time.\n");
|
|
|
|
pwc_construct(pdev); /* set min/max sizes correct */
|
|
|
|
/* So far, so good. Allocate memory. */
|
|
i = pwc_allocate_buffers(pdev);
|
|
if (i < 0) {
|
|
PWC_DEBUG_OPEN("Failed to allocate buffers memory.\n");
|
|
pwc_free_buffers(pdev);
|
|
mutex_unlock(&pdev->modlock);
|
|
return i;
|
|
}
|
|
|
|
/* Reset buffers & parameters */
|
|
pwc_reset_buffers(pdev);
|
|
for (i = 0; i < pwc_mbufs; i++)
|
|
pdev->image_used[i] = 0;
|
|
pdev->vframe_count = 0;
|
|
pdev->vframes_dumped = 0;
|
|
pdev->vframes_error = 0;
|
|
pdev->visoc_errors = 0;
|
|
pdev->error_status = 0;
|
|
pwc_construct(pdev); /* set min/max sizes correct */
|
|
|
|
/* Set some defaults */
|
|
pdev->vsnapshot = 0;
|
|
|
|
/* Start iso pipe for video; first try the last used video size
|
|
(or the default one); if that fails try QCIF/10 or QSIF/10;
|
|
it that fails too, give up.
|
|
*/
|
|
i = pwc_set_video_mode(pdev, pwc_image_sizes[pdev->vsize].x, pwc_image_sizes[pdev->vsize].y, pdev->vframes, pdev->vcompression, 0);
|
|
if (i) {
|
|
unsigned int default_resolution;
|
|
PWC_DEBUG_OPEN("First attempt at set_video_mode failed.\n");
|
|
if (pdev->type>= 730)
|
|
default_resolution = PSZ_QSIF;
|
|
else
|
|
default_resolution = PSZ_QCIF;
|
|
|
|
i = pwc_set_video_mode(pdev,
|
|
pwc_image_sizes[default_resolution].x,
|
|
pwc_image_sizes[default_resolution].y,
|
|
10,
|
|
pdev->vcompression,
|
|
0);
|
|
}
|
|
if (i) {
|
|
PWC_DEBUG_OPEN("Second attempt at set_video_mode failed.\n");
|
|
pwc_free_buffers(pdev);
|
|
mutex_unlock(&pdev->modlock);
|
|
return i;
|
|
}
|
|
|
|
i = pwc_isoc_init(pdev);
|
|
if (i) {
|
|
PWC_DEBUG_OPEN("Failed to init ISOC stuff = %d.\n", i);
|
|
pwc_isoc_cleanup(pdev);
|
|
pwc_free_buffers(pdev);
|
|
mutex_unlock(&pdev->modlock);
|
|
return i;
|
|
}
|
|
|
|
/* Initialize the webcam to sane value */
|
|
pwc_set_brightness(pdev, 0x7fff);
|
|
pwc_set_agc(pdev, 1, 0);
|
|
|
|
pdev->vopen++;
|
|
file->private_data = vdev;
|
|
mutex_unlock(&pdev->modlock);
|
|
PWC_DEBUG_OPEN("<< video_open() returns 0.\n");
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void pwc_cleanup(struct pwc_device *pdev)
|
|
{
|
|
pwc_remove_sysfs_files(pdev->vdev);
|
|
video_unregister_device(pdev->vdev);
|
|
}
|
|
|
|
/* Note that all cleanup is done in the reverse order as in _open */
|
|
static int pwc_video_close(struct inode *inode, struct file *file)
|
|
{
|
|
struct video_device *vdev = file->private_data;
|
|
struct pwc_device *pdev;
|
|
int i, hint;
|
|
|
|
PWC_DEBUG_OPEN(">> video_close called(vdev = 0x%p).\n", vdev);
|
|
|
|
lock_kernel();
|
|
pdev = video_get_drvdata(vdev);
|
|
if (pdev->vopen == 0)
|
|
PWC_DEBUG_MODULE("video_close() called on closed device?\n");
|
|
|
|
/* Dump statistics, but only if a reasonable amount of frames were
|
|
processed (to prevent endless log-entries in case of snap-shot
|
|
programs)
|
|
*/
|
|
if (pdev->vframe_count > 20)
|
|
PWC_DEBUG_MODULE("Closing video device: %d frames received, dumped %d frames, %d frames with errors.\n", pdev->vframe_count, pdev->vframes_dumped, pdev->vframes_error);
|
|
|
|
if (DEVICE_USE_CODEC1(pdev->type))
|
|
pwc_dec1_exit();
|
|
else
|
|
pwc_dec23_exit();
|
|
|
|
pwc_isoc_cleanup(pdev);
|
|
pwc_free_buffers(pdev);
|
|
|
|
/* Turn off LEDS and power down camera, but only when not unplugged */
|
|
if (!pdev->unplugged) {
|
|
/* Turn LEDs off */
|
|
if (pwc_set_leds(pdev, 0, 0) < 0)
|
|
PWC_DEBUG_MODULE("Failed to set LED on/off time.\n");
|
|
if (power_save) {
|
|
i = pwc_camera_power(pdev, 0);
|
|
if (i < 0)
|
|
PWC_ERROR("Failed to power down camera (%d)\n", i);
|
|
}
|
|
pdev->vopen--;
|
|
PWC_DEBUG_OPEN("<< video_close() vopen=%d\n", pdev->vopen);
|
|
} else {
|
|
pwc_cleanup(pdev);
|
|
/* Free memory (don't set pdev to 0 just yet) */
|
|
kfree(pdev);
|
|
/* search device_hint[] table if we occupy a slot, by any chance */
|
|
for (hint = 0; hint < MAX_DEV_HINTS; hint++)
|
|
if (device_hint[hint].pdev == pdev)
|
|
device_hint[hint].pdev = NULL;
|
|
}
|
|
unlock_kernel();
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* FIXME: what about two parallel reads ????
|
|
* ANSWER: Not supported. You can't open the device more than once,
|
|
despite what the V4L1 interface says. First, I don't see
|
|
the need, second there's no mechanism of alerting the
|
|
2nd/3rd/... process of events like changing image size.
|
|
And I don't see the point of blocking that for the
|
|
2nd/3rd/... process.
|
|
In multi-threaded environments reading parallel from any
|
|
device is tricky anyhow.
|
|
*/
|
|
|
|
static ssize_t pwc_video_read(struct file *file, char __user *buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct video_device *vdev = file->private_data;
|
|
struct pwc_device *pdev;
|
|
int noblock = file->f_flags & O_NONBLOCK;
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
int bytes_to_read, rv = 0;
|
|
void *image_buffer_addr;
|
|
|
|
PWC_DEBUG_READ("pwc_video_read(vdev=0x%p, buf=%p, count=%zd) called.\n",
|
|
vdev, buf, count);
|
|
if (vdev == NULL)
|
|
return -EFAULT;
|
|
pdev = video_get_drvdata(vdev);
|
|
if (pdev == NULL)
|
|
return -EFAULT;
|
|
|
|
mutex_lock(&pdev->modlock);
|
|
if (pdev->error_status) {
|
|
rv = -pdev->error_status; /* Something happened, report what. */
|
|
goto err_out;
|
|
}
|
|
|
|
/* In case we're doing partial reads, we don't have to wait for a frame */
|
|
if (pdev->image_read_pos == 0) {
|
|
/* Do wait queueing according to the (doc)book */
|
|
add_wait_queue(&pdev->frameq, &wait);
|
|
while (pdev->full_frames == NULL) {
|
|
/* Check for unplugged/etc. here */
|
|
if (pdev->error_status) {
|
|
remove_wait_queue(&pdev->frameq, &wait);
|
|
set_current_state(TASK_RUNNING);
|
|
rv = -pdev->error_status ;
|
|
goto err_out;
|
|
}
|
|
if (noblock) {
|
|
remove_wait_queue(&pdev->frameq, &wait);
|
|
set_current_state(TASK_RUNNING);
|
|
rv = -EWOULDBLOCK;
|
|
goto err_out;
|
|
}
|
|
if (signal_pending(current)) {
|
|
remove_wait_queue(&pdev->frameq, &wait);
|
|
set_current_state(TASK_RUNNING);
|
|
rv = -ERESTARTSYS;
|
|
goto err_out;
|
|
}
|
|
schedule();
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
}
|
|
remove_wait_queue(&pdev->frameq, &wait);
|
|
set_current_state(TASK_RUNNING);
|
|
|
|
/* Decompress and release frame */
|
|
if (pwc_handle_frame(pdev)) {
|
|
rv = -EFAULT;
|
|
goto err_out;
|
|
}
|
|
}
|
|
|
|
PWC_DEBUG_READ("Copying data to user space.\n");
|
|
if (pdev->vpalette == VIDEO_PALETTE_RAW)
|
|
bytes_to_read = pdev->frame_size + sizeof(struct pwc_raw_frame);
|
|
else
|
|
bytes_to_read = pdev->view.size;
|
|
|
|
/* copy bytes to user space; we allow for partial reads */
|
|
if (count + pdev->image_read_pos > bytes_to_read)
|
|
count = bytes_to_read - pdev->image_read_pos;
|
|
image_buffer_addr = pdev->image_data;
|
|
image_buffer_addr += pdev->images[pdev->fill_image].offset;
|
|
image_buffer_addr += pdev->image_read_pos;
|
|
if (copy_to_user(buf, image_buffer_addr, count)) {
|
|
rv = -EFAULT;
|
|
goto err_out;
|
|
}
|
|
pdev->image_read_pos += count;
|
|
if (pdev->image_read_pos >= bytes_to_read) { /* All data has been read */
|
|
pdev->image_read_pos = 0;
|
|
pwc_next_image(pdev);
|
|
}
|
|
mutex_unlock(&pdev->modlock);
|
|
return count;
|
|
err_out:
|
|
mutex_unlock(&pdev->modlock);
|
|
return rv;
|
|
}
|
|
|
|
static unsigned int pwc_video_poll(struct file *file, poll_table *wait)
|
|
{
|
|
struct video_device *vdev = file->private_data;
|
|
struct pwc_device *pdev;
|
|
|
|
if (vdev == NULL)
|
|
return -EFAULT;
|
|
pdev = video_get_drvdata(vdev);
|
|
if (pdev == NULL)
|
|
return -EFAULT;
|
|
|
|
poll_wait(file, &pdev->frameq, wait);
|
|
if (pdev->error_status)
|
|
return POLLERR;
|
|
if (pdev->full_frames != NULL) /* we have frames waiting */
|
|
return (POLLIN | POLLRDNORM);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pwc_video_ioctl(struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct video_device *vdev = file->private_data;
|
|
struct pwc_device *pdev;
|
|
int r = -ENODEV;
|
|
|
|
if (!vdev)
|
|
goto out;
|
|
pdev = video_get_drvdata(vdev);
|
|
|
|
mutex_lock(&pdev->modlock);
|
|
if (!pdev->unplugged)
|
|
r = video_usercopy(file, cmd, arg, pwc_video_do_ioctl);
|
|
mutex_unlock(&pdev->modlock);
|
|
out:
|
|
return r;
|
|
}
|
|
|
|
static int pwc_video_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
struct video_device *vdev = file->private_data;
|
|
struct pwc_device *pdev;
|
|
unsigned long start;
|
|
unsigned long size;
|
|
unsigned long page, pos = 0;
|
|
int index;
|
|
|
|
PWC_DEBUG_MEMORY(">> %s\n", __func__);
|
|
pdev = video_get_drvdata(vdev);
|
|
size = vma->vm_end - vma->vm_start;
|
|
start = vma->vm_start;
|
|
|
|
/* Find the idx buffer for this mapping */
|
|
for (index = 0; index < pwc_mbufs; index++) {
|
|
pos = pdev->images[index].offset;
|
|
if ((pos>>PAGE_SHIFT) == vma->vm_pgoff)
|
|
break;
|
|
}
|
|
if (index == MAX_IMAGES)
|
|
return -EINVAL;
|
|
if (index == 0) {
|
|
/*
|
|
* Special case for v4l1. In v4l1, we map only one big buffer,
|
|
* but in v4l2 each buffer is mapped
|
|
*/
|
|
unsigned long total_size;
|
|
total_size = pwc_mbufs * pdev->len_per_image;
|
|
if (size != pdev->len_per_image && size != total_size) {
|
|
PWC_ERROR("Wrong size (%lu) needed to be len_per_image=%d or total_size=%lu\n",
|
|
size, pdev->len_per_image, total_size);
|
|
return -EINVAL;
|
|
}
|
|
} else if (size > pdev->len_per_image)
|
|
return -EINVAL;
|
|
|
|
vma->vm_flags |= VM_IO; /* from 2.6.9-acX */
|
|
|
|
pos += (unsigned long)pdev->image_data;
|
|
while (size > 0) {
|
|
page = vmalloc_to_pfn((void *)pos);
|
|
if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED))
|
|
return -EAGAIN;
|
|
start += PAGE_SIZE;
|
|
pos += PAGE_SIZE;
|
|
if (size > PAGE_SIZE)
|
|
size -= PAGE_SIZE;
|
|
else
|
|
size = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/***************************************************************************/
|
|
/* USB functions */
|
|
|
|
/* This function gets called when a new device is plugged in or the usb core
|
|
* is loaded.
|
|
*/
|
|
|
|
static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id *id)
|
|
{
|
|
struct usb_device *udev = interface_to_usbdev(intf);
|
|
struct pwc_device *pdev = NULL;
|
|
int vendor_id, product_id, type_id;
|
|
int i, hint, rc;
|
|
int features = 0;
|
|
int video_nr = -1; /* default: use next available device */
|
|
char serial_number[30], *name;
|
|
|
|
vendor_id = le16_to_cpu(udev->descriptor.idVendor);
|
|
product_id = le16_to_cpu(udev->descriptor.idProduct);
|
|
|
|
/* Check if we can handle this device */
|
|
PWC_DEBUG_PROBE("probe() called [%04X %04X], if %d\n",
|
|
vendor_id, product_id,
|
|
intf->altsetting->desc.bInterfaceNumber);
|
|
|
|
/* the interfaces are probed one by one. We are only interested in the
|
|
video interface (0) now.
|
|
Interface 1 is the Audio Control, and interface 2 Audio itself.
|
|
*/
|
|
if (intf->altsetting->desc.bInterfaceNumber > 0)
|
|
return -ENODEV;
|
|
|
|
if (vendor_id == 0x0471) {
|
|
switch (product_id) {
|
|
case 0x0302:
|
|
PWC_INFO("Philips PCA645VC USB webcam detected.\n");
|
|
name = "Philips 645 webcam";
|
|
type_id = 645;
|
|
break;
|
|
case 0x0303:
|
|
PWC_INFO("Philips PCA646VC USB webcam detected.\n");
|
|
name = "Philips 646 webcam";
|
|
type_id = 646;
|
|
break;
|
|
case 0x0304:
|
|
PWC_INFO("Askey VC010 type 2 USB webcam detected.\n");
|
|
name = "Askey VC010 webcam";
|
|
type_id = 646;
|
|
break;
|
|
case 0x0307:
|
|
PWC_INFO("Philips PCVC675K (Vesta) USB webcam detected.\n");
|
|
name = "Philips 675 webcam";
|
|
type_id = 675;
|
|
break;
|
|
case 0x0308:
|
|
PWC_INFO("Philips PCVC680K (Vesta Pro) USB webcam detected.\n");
|
|
name = "Philips 680 webcam";
|
|
type_id = 680;
|
|
break;
|
|
case 0x030C:
|
|
PWC_INFO("Philips PCVC690K (Vesta Pro Scan) USB webcam detected.\n");
|
|
name = "Philips 690 webcam";
|
|
type_id = 690;
|
|
break;
|
|
case 0x0310:
|
|
PWC_INFO("Philips PCVC730K (ToUCam Fun)/PCVC830 (ToUCam II) USB webcam detected.\n");
|
|
name = "Philips 730 webcam";
|
|
type_id = 730;
|
|
break;
|
|
case 0x0311:
|
|
PWC_INFO("Philips PCVC740K (ToUCam Pro)/PCVC840 (ToUCam II) USB webcam detected.\n");
|
|
name = "Philips 740 webcam";
|
|
type_id = 740;
|
|
break;
|
|
case 0x0312:
|
|
PWC_INFO("Philips PCVC750K (ToUCam Pro Scan) USB webcam detected.\n");
|
|
name = "Philips 750 webcam";
|
|
type_id = 750;
|
|
break;
|
|
case 0x0313:
|
|
PWC_INFO("Philips PCVC720K/40 (ToUCam XS) USB webcam detected.\n");
|
|
name = "Philips 720K/40 webcam";
|
|
type_id = 720;
|
|
break;
|
|
case 0x0329:
|
|
PWC_INFO("Philips SPC 900NC USB webcam detected.\n");
|
|
name = "Philips SPC 900NC webcam";
|
|
type_id = 740;
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
break;
|
|
}
|
|
}
|
|
else if (vendor_id == 0x069A) {
|
|
switch(product_id) {
|
|
case 0x0001:
|
|
PWC_INFO("Askey VC010 type 1 USB webcam detected.\n");
|
|
name = "Askey VC010 webcam";
|
|
type_id = 645;
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
break;
|
|
}
|
|
}
|
|
else if (vendor_id == 0x046d) {
|
|
switch(product_id) {
|
|
case 0x08b0:
|
|
PWC_INFO("Logitech QuickCam Pro 3000 USB webcam detected.\n");
|
|
name = "Logitech QuickCam Pro 3000";
|
|
type_id = 740; /* CCD sensor */
|
|
break;
|
|
case 0x08b1:
|
|
PWC_INFO("Logitech QuickCam Notebook Pro USB webcam detected.\n");
|
|
name = "Logitech QuickCam Notebook Pro";
|
|
type_id = 740; /* CCD sensor */
|
|
break;
|
|
case 0x08b2:
|
|
PWC_INFO("Logitech QuickCam 4000 Pro USB webcam detected.\n");
|
|
name = "Logitech QuickCam Pro 4000";
|
|
type_id = 740; /* CCD sensor */
|
|
break;
|
|
case 0x08b3:
|
|
PWC_INFO("Logitech QuickCam Zoom USB webcam detected.\n");
|
|
name = "Logitech QuickCam Zoom";
|
|
type_id = 740; /* CCD sensor */
|
|
break;
|
|
case 0x08B4:
|
|
PWC_INFO("Logitech QuickCam Zoom (new model) USB webcam detected.\n");
|
|
name = "Logitech QuickCam Zoom";
|
|
type_id = 740; /* CCD sensor */
|
|
power_save = 1;
|
|
break;
|
|
case 0x08b5:
|
|
PWC_INFO("Logitech QuickCam Orbit/Sphere USB webcam detected.\n");
|
|
name = "Logitech QuickCam Orbit";
|
|
type_id = 740; /* CCD sensor */
|
|
features |= FEATURE_MOTOR_PANTILT;
|
|
break;
|
|
case 0x08b6:
|
|
PWC_INFO("Logitech/Cisco VT Camera webcam detected.\n");
|
|
name = "Cisco VT Camera";
|
|
type_id = 740; /* CCD sensor */
|
|
break;
|
|
case 0x08b7:
|
|
PWC_INFO("Logitech ViewPort AV 100 webcam detected.\n");
|
|
name = "Logitech ViewPort AV 100";
|
|
type_id = 740; /* CCD sensor */
|
|
break;
|
|
case 0x08b8: /* Where this released? */
|
|
PWC_INFO("Logitech QuickCam detected (reserved ID).\n");
|
|
name = "Logitech QuickCam (res.)";
|
|
type_id = 730; /* Assuming CMOS */
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
break;
|
|
}
|
|
}
|
|
else if (vendor_id == 0x055d) {
|
|
/* I don't know the difference between the C10 and the C30;
|
|
I suppose the difference is the sensor, but both cameras
|
|
work equally well with a type_id of 675
|
|
*/
|
|
switch(product_id) {
|
|
case 0x9000:
|
|
PWC_INFO("Samsung MPC-C10 USB webcam detected.\n");
|
|
name = "Samsung MPC-C10";
|
|
type_id = 675;
|
|
break;
|
|
case 0x9001:
|
|
PWC_INFO("Samsung MPC-C30 USB webcam detected.\n");
|
|
name = "Samsung MPC-C30";
|
|
type_id = 675;
|
|
break;
|
|
case 0x9002:
|
|
PWC_INFO("Samsung SNC-35E (v3.0) USB webcam detected.\n");
|
|
name = "Samsung MPC-C30";
|
|
type_id = 740;
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
break;
|
|
}
|
|
}
|
|
else if (vendor_id == 0x041e) {
|
|
switch(product_id) {
|
|
case 0x400c:
|
|
PWC_INFO("Creative Labs Webcam 5 detected.\n");
|
|
name = "Creative Labs Webcam 5";
|
|
type_id = 730;
|
|
break;
|
|
case 0x4011:
|
|
PWC_INFO("Creative Labs Webcam Pro Ex detected.\n");
|
|
name = "Creative Labs Webcam Pro Ex";
|
|
type_id = 740;
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
break;
|
|
}
|
|
}
|
|
else if (vendor_id == 0x04cc) {
|
|
switch(product_id) {
|
|
case 0x8116:
|
|
PWC_INFO("Sotec Afina Eye USB webcam detected.\n");
|
|
name = "Sotec Afina Eye";
|
|
type_id = 730;
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
break;
|
|
}
|
|
}
|
|
else if (vendor_id == 0x06be) {
|
|
switch(product_id) {
|
|
case 0x8116:
|
|
/* This is essentially the same cam as the Sotec Afina Eye */
|
|
PWC_INFO("AME Co. Afina Eye USB webcam detected.\n");
|
|
name = "AME Co. Afina Eye";
|
|
type_id = 750;
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
break;
|
|
}
|
|
|
|
}
|
|
else if (vendor_id == 0x0d81) {
|
|
switch(product_id) {
|
|
case 0x1900:
|
|
PWC_INFO("Visionite VCS-UC300 USB webcam detected.\n");
|
|
name = "Visionite VCS-UC300";
|
|
type_id = 740; /* CCD sensor */
|
|
break;
|
|
case 0x1910:
|
|
PWC_INFO("Visionite VCS-UM100 USB webcam detected.\n");
|
|
name = "Visionite VCS-UM100";
|
|
type_id = 730; /* CMOS sensor */
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
return -ENODEV; /* Not any of the know types; but the list keeps growing. */
|
|
|
|
memset(serial_number, 0, 30);
|
|
usb_string(udev, udev->descriptor.iSerialNumber, serial_number, 29);
|
|
PWC_DEBUG_PROBE("Device serial number is %s\n", serial_number);
|
|
|
|
if (udev->descriptor.bNumConfigurations > 1)
|
|
PWC_WARNING("Warning: more than 1 configuration available.\n");
|
|
|
|
/* Allocate structure, initialize pointers, mutexes, etc. and link it to the usb_device */
|
|
pdev = kzalloc(sizeof(struct pwc_device), GFP_KERNEL);
|
|
if (pdev == NULL) {
|
|
PWC_ERROR("Oops, could not allocate memory for pwc_device.\n");
|
|
return -ENOMEM;
|
|
}
|
|
pdev->type = type_id;
|
|
pdev->vsize = default_size;
|
|
pdev->vframes = default_fps;
|
|
strcpy(pdev->serial, serial_number);
|
|
pdev->features = features;
|
|
if (vendor_id == 0x046D && product_id == 0x08B5)
|
|
{
|
|
/* Logitech QuickCam Orbit
|
|
The ranges have been determined experimentally; they may differ from cam to cam.
|
|
Also, the exact ranges left-right and up-down are different for my cam
|
|
*/
|
|
pdev->angle_range.pan_min = -7000;
|
|
pdev->angle_range.pan_max = 7000;
|
|
pdev->angle_range.tilt_min = -3000;
|
|
pdev->angle_range.tilt_max = 2500;
|
|
}
|
|
|
|
mutex_init(&pdev->modlock);
|
|
spin_lock_init(&pdev->ptrlock);
|
|
|
|
pdev->udev = udev;
|
|
init_waitqueue_head(&pdev->frameq);
|
|
pdev->vcompression = pwc_preferred_compression;
|
|
|
|
/* Allocate video_device structure */
|
|
pdev->vdev = video_device_alloc();
|
|
if (!pdev->vdev) {
|
|
PWC_ERROR("Err, cannot allocate video_device struture. Failing probe.");
|
|
kfree(pdev);
|
|
return -ENOMEM;
|
|
}
|
|
memcpy(pdev->vdev, &pwc_template, sizeof(pwc_template));
|
|
pdev->vdev->parent = &(udev->dev);
|
|
strcpy(pdev->vdev->name, name);
|
|
video_set_drvdata(pdev->vdev, pdev);
|
|
|
|
pdev->release = le16_to_cpu(udev->descriptor.bcdDevice);
|
|
PWC_DEBUG_PROBE("Release: %04x\n", pdev->release);
|
|
|
|
/* Now search device_hint[] table for a match, so we can hint a node number. */
|
|
for (hint = 0; hint < MAX_DEV_HINTS; hint++) {
|
|
if (((device_hint[hint].type == -1) || (device_hint[hint].type == pdev->type)) &&
|
|
(device_hint[hint].pdev == NULL)) {
|
|
/* so far, so good... try serial number */
|
|
if ((device_hint[hint].serial_number[0] == '*') || !strcmp(device_hint[hint].serial_number, serial_number)) {
|
|
/* match! */
|
|
video_nr = device_hint[hint].device_node;
|
|
PWC_DEBUG_PROBE("Found hint, will try to register as /dev/video%d\n", video_nr);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
pdev->vdev->release = video_device_release;
|
|
i = video_register_device(pdev->vdev, VFL_TYPE_GRABBER, video_nr);
|
|
if (i < 0) {
|
|
PWC_ERROR("Failed to register as video device (%d).\n", i);
|
|
rc = i;
|
|
goto err;
|
|
}
|
|
else {
|
|
PWC_INFO("Registered as /dev/video%d.\n", pdev->vdev->num);
|
|
}
|
|
|
|
/* occupy slot */
|
|
if (hint < MAX_DEV_HINTS)
|
|
device_hint[hint].pdev = pdev;
|
|
|
|
PWC_DEBUG_PROBE("probe() function returning struct at 0x%p.\n", pdev);
|
|
usb_set_intfdata (intf, pdev);
|
|
rc = pwc_create_sysfs_files(pdev->vdev);
|
|
if (rc)
|
|
goto err_unreg;
|
|
|
|
/* Set the leds off */
|
|
pwc_set_leds(pdev, 0, 0);
|
|
pwc_camera_power(pdev, 0);
|
|
|
|
return 0;
|
|
|
|
err_unreg:
|
|
if (hint < MAX_DEV_HINTS)
|
|
device_hint[hint].pdev = NULL;
|
|
video_unregister_device(pdev->vdev);
|
|
err:
|
|
video_device_release(pdev->vdev); /* Drip... drip... drip... */
|
|
kfree(pdev); /* Oops, no memory leaks please */
|
|
return rc;
|
|
}
|
|
|
|
/* The user janked out the cable... */
|
|
static void usb_pwc_disconnect(struct usb_interface *intf)
|
|
{
|
|
struct pwc_device *pdev;
|
|
int hint;
|
|
|
|
lock_kernel();
|
|
pdev = usb_get_intfdata (intf);
|
|
usb_set_intfdata (intf, NULL);
|
|
if (pdev == NULL) {
|
|
PWC_ERROR("pwc_disconnect() Called without private pointer.\n");
|
|
goto disconnect_out;
|
|
}
|
|
if (pdev->udev == NULL) {
|
|
PWC_ERROR("pwc_disconnect() already called for %p\n", pdev);
|
|
goto disconnect_out;
|
|
}
|
|
if (pdev->udev != interface_to_usbdev(intf)) {
|
|
PWC_ERROR("pwc_disconnect() Woops: pointer mismatch udev/pdev.\n");
|
|
goto disconnect_out;
|
|
}
|
|
|
|
/* We got unplugged; this is signalled by an EPIPE error code */
|
|
if (pdev->vopen) {
|
|
PWC_INFO("Disconnected while webcam is in use!\n");
|
|
pdev->error_status = EPIPE;
|
|
}
|
|
|
|
/* Alert waiting processes */
|
|
wake_up_interruptible(&pdev->frameq);
|
|
/* Wait until device is closed */
|
|
if(pdev->vopen) {
|
|
mutex_lock(&pdev->modlock);
|
|
pdev->unplugged = 1;
|
|
mutex_unlock(&pdev->modlock);
|
|
pwc_iso_stop(pdev);
|
|
} else {
|
|
/* Device is closed, so we can safely unregister it */
|
|
PWC_DEBUG_PROBE("Unregistering video device in disconnect().\n");
|
|
pwc_cleanup(pdev);
|
|
/* Free memory (don't set pdev to 0 just yet) */
|
|
kfree(pdev);
|
|
|
|
disconnect_out:
|
|
/* search device_hint[] table if we occupy a slot, by any chance */
|
|
for (hint = 0; hint < MAX_DEV_HINTS; hint++)
|
|
if (device_hint[hint].pdev == pdev)
|
|
device_hint[hint].pdev = NULL;
|
|
}
|
|
|
|
unlock_kernel();
|
|
}
|
|
|
|
/* *grunt* We have to do atoi ourselves :-( */
|
|
static int pwc_atoi(const char *s)
|
|
{
|
|
int k = 0;
|
|
|
|
k = 0;
|
|
while (*s != '\0' && *s >= '0' && *s <= '9') {
|
|
k = 10 * k + (*s - '0');
|
|
s++;
|
|
}
|
|
return k;
|
|
}
|
|
|
|
|
|
/*
|
|
* Initialization code & module stuff
|
|
*/
|
|
|
|
static char *size;
|
|
static int fps;
|
|
static int fbufs;
|
|
static int mbufs;
|
|
static int compression = -1;
|
|
static int leds[2] = { -1, -1 };
|
|
static unsigned int leds_nargs;
|
|
static char *dev_hint[MAX_DEV_HINTS];
|
|
static unsigned int dev_hint_nargs;
|
|
|
|
module_param(size, charp, 0444);
|
|
module_param(fps, int, 0444);
|
|
module_param(fbufs, int, 0444);
|
|
module_param(mbufs, int, 0444);
|
|
#ifdef CONFIG_USB_PWC_DEBUG
|
|
module_param_named(trace, pwc_trace, int, 0644);
|
|
#endif
|
|
module_param(power_save, int, 0444);
|
|
module_param(compression, int, 0444);
|
|
module_param_array(leds, int, &leds_nargs, 0444);
|
|
module_param_array(dev_hint, charp, &dev_hint_nargs, 0444);
|
|
|
|
MODULE_PARM_DESC(size, "Initial image size. One of sqcif, qsif, qcif, sif, cif, vga");
|
|
MODULE_PARM_DESC(fps, "Initial frames per second. Varies with model, useful range 5-30");
|
|
MODULE_PARM_DESC(fbufs, "Number of internal frame buffers to reserve");
|
|
MODULE_PARM_DESC(mbufs, "Number of external (mmap()ed) image buffers");
|
|
MODULE_PARM_DESC(trace, "For debugging purposes");
|
|
MODULE_PARM_DESC(power_save, "Turn power save feature in camera on or off");
|
|
MODULE_PARM_DESC(compression, "Preferred compression quality. Range 0 (uncompressed) to 3 (high compression)");
|
|
MODULE_PARM_DESC(leds, "LED on,off time in milliseconds");
|
|
MODULE_PARM_DESC(dev_hint, "Device node hints");
|
|
|
|
MODULE_DESCRIPTION("Philips & OEM USB webcam driver");
|
|
MODULE_AUTHOR("Luc Saillard <luc@saillard.org>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("pwcx");
|
|
MODULE_VERSION( PWC_VERSION );
|
|
|
|
static int __init usb_pwc_init(void)
|
|
{
|
|
int i, sz;
|
|
char *sizenames[PSZ_MAX] = { "sqcif", "qsif", "qcif", "sif", "cif", "vga" };
|
|
|
|
PWC_INFO("Philips webcam module version " PWC_VERSION " loaded.\n");
|
|
PWC_INFO("Supports Philips PCA645/646, PCVC675/680/690, PCVC720[40]/730/740/750 & PCVC830/840.\n");
|
|
PWC_INFO("Also supports the Askey VC010, various Logitech Quickcams, Samsung MPC-C10 and MPC-C30,\n");
|
|
PWC_INFO("the Creative WebCam 5 & Pro Ex, SOTEC Afina Eye and Visionite VCS-UC300 and VCS-UM100.\n");
|
|
|
|
if (fps) {
|
|
if (fps < 4 || fps > 30) {
|
|
PWC_ERROR("Framerate out of bounds (4-30).\n");
|
|
return -EINVAL;
|
|
}
|
|
default_fps = fps;
|
|
PWC_DEBUG_MODULE("Default framerate set to %d.\n", default_fps);
|
|
}
|
|
|
|
if (size) {
|
|
/* string; try matching with array */
|
|
for (sz = 0; sz < PSZ_MAX; sz++) {
|
|
if (!strcmp(sizenames[sz], size)) { /* Found! */
|
|
default_size = sz;
|
|
break;
|
|
}
|
|
}
|
|
if (sz == PSZ_MAX) {
|
|
PWC_ERROR("Size not recognized; try size=[sqcif | qsif | qcif | sif | cif | vga].\n");
|
|
return -EINVAL;
|
|
}
|
|
PWC_DEBUG_MODULE("Default image size set to %s [%dx%d].\n", sizenames[default_size], pwc_image_sizes[default_size].x, pwc_image_sizes[default_size].y);
|
|
}
|
|
if (mbufs) {
|
|
if (mbufs < 1 || mbufs > MAX_IMAGES) {
|
|
PWC_ERROR("Illegal number of mmap() buffers; use a number between 1 and %d.\n", MAX_IMAGES);
|
|
return -EINVAL;
|
|
}
|
|
pwc_mbufs = mbufs;
|
|
PWC_DEBUG_MODULE("Number of image buffers set to %d.\n", pwc_mbufs);
|
|
}
|
|
if (fbufs) {
|
|
if (fbufs < 2 || fbufs > MAX_FRAMES) {
|
|
PWC_ERROR("Illegal number of frame buffers; use a number between 2 and %d.\n", MAX_FRAMES);
|
|
return -EINVAL;
|
|
}
|
|
default_fbufs = fbufs;
|
|
PWC_DEBUG_MODULE("Number of frame buffers set to %d.\n", default_fbufs);
|
|
}
|
|
#ifdef CONFIG_USB_PWC_DEBUG
|
|
if (pwc_trace >= 0) {
|
|
PWC_DEBUG_MODULE("Trace options: 0x%04x\n", pwc_trace);
|
|
}
|
|
#endif
|
|
if (compression >= 0) {
|
|
if (compression > 3) {
|
|
PWC_ERROR("Invalid compression setting; use a number between 0 (uncompressed) and 3 (high).\n");
|
|
return -EINVAL;
|
|
}
|
|
pwc_preferred_compression = compression;
|
|
PWC_DEBUG_MODULE("Preferred compression set to %d.\n", pwc_preferred_compression);
|
|
}
|
|
if (power_save)
|
|
PWC_DEBUG_MODULE("Enabling power save on open/close.\n");
|
|
if (leds[0] >= 0)
|
|
led_on = leds[0];
|
|
if (leds[1] >= 0)
|
|
led_off = leds[1];
|
|
|
|
/* Big device node whoopla. Basically, it allows you to assign a
|
|
device node (/dev/videoX) to a camera, based on its type
|
|
& serial number. The format is [type[.serialnumber]:]node.
|
|
|
|
Any camera that isn't matched by these rules gets the next
|
|
available free device node.
|
|
*/
|
|
for (i = 0; i < MAX_DEV_HINTS; i++) {
|
|
char *s, *colon, *dot;
|
|
|
|
/* This loop also initializes the array */
|
|
device_hint[i].pdev = NULL;
|
|
s = dev_hint[i];
|
|
if (s != NULL && *s != '\0') {
|
|
device_hint[i].type = -1; /* wildcard */
|
|
strcpy(device_hint[i].serial_number, "*");
|
|
|
|
/* parse string: chop at ':' & '/' */
|
|
colon = dot = s;
|
|
while (*colon != '\0' && *colon != ':')
|
|
colon++;
|
|
while (*dot != '\0' && *dot != '.')
|
|
dot++;
|
|
/* Few sanity checks */
|
|
if (*dot != '\0' && dot > colon) {
|
|
PWC_ERROR("Malformed camera hint: the colon must be after the dot.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (*colon == '\0') {
|
|
/* No colon */
|
|
if (*dot != '\0') {
|
|
PWC_ERROR("Malformed camera hint: no colon + device node given.\n");
|
|
return -EINVAL;
|
|
}
|
|
else {
|
|
/* No type or serial number specified, just a number. */
|
|
device_hint[i].device_node = pwc_atoi(s);
|
|
}
|
|
}
|
|
else {
|
|
/* There's a colon, so we have at least a type and a device node */
|
|
device_hint[i].type = pwc_atoi(s);
|
|
device_hint[i].device_node = pwc_atoi(colon + 1);
|
|
if (*dot != '\0') {
|
|
/* There's a serial number as well */
|
|
int k;
|
|
|
|
dot++;
|
|
k = 0;
|
|
while (*dot != ':' && k < 29) {
|
|
device_hint[i].serial_number[k++] = *dot;
|
|
dot++;
|
|
}
|
|
device_hint[i].serial_number[k] = '\0';
|
|
}
|
|
}
|
|
PWC_TRACE("device_hint[%d]:\n", i);
|
|
PWC_TRACE(" type : %d\n", device_hint[i].type);
|
|
PWC_TRACE(" serial# : %s\n", device_hint[i].serial_number);
|
|
PWC_TRACE(" node : %d\n", device_hint[i].device_node);
|
|
}
|
|
else
|
|
device_hint[i].type = 0; /* not filled */
|
|
} /* ..for MAX_DEV_HINTS */
|
|
|
|
PWC_DEBUG_PROBE("Registering driver at address 0x%p.\n", &pwc_driver);
|
|
return usb_register(&pwc_driver);
|
|
}
|
|
|
|
static void __exit usb_pwc_exit(void)
|
|
{
|
|
PWC_DEBUG_MODULE("Deregistering driver.\n");
|
|
usb_deregister(&pwc_driver);
|
|
PWC_INFO("Philips webcam module removed.\n");
|
|
}
|
|
|
|
module_init(usb_pwc_init);
|
|
module_exit(usb_pwc_exit);
|
|
|
|
/* vim: set cino= formatoptions=croql cindent shiftwidth=8 tabstop=8: */
|