1 /* Linux driver for Philips webcam
2 USB and Video4Linux interface part.
3 (C) 1999-2004 Nemosoft Unv.
4 (C) 2004-2006 Luc Saillard (luc@saillard.org)
6 NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
7 driver and thus may have bugs that are not present in the original version.
8 Please send bug reports and support requests to <luc@saillard.org>.
9 The decompression routines have been implemented by reverse-engineering the
10 Nemosoft binary pwcx module. Caveat emptor.
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 This code forms the interface between the USB layers and the Philips
30 specific stuff. Some adanved stuff of the driver falls under an
31 NDA, signed between me and Philips B.V., Eindhoven, the Netherlands, and
32 is thus not distributed in source form. The binary pwcx.o module
33 contains the code that falls under the NDA.
35 In case you're wondering: 'pwc' stands for "Philips WebCam", but
36 I really didn't want to type 'philips_web_cam' every time (I'm lazy as
37 any Linux kernel hacker, but I don't like uncomprehensible abbreviations
40 Oh yes, convention: to disctinguish between all the various pointers to
41 device-structures, I use these names for the pointer variables:
42 udev: struct usb_device *
43 vdev: struct video_device *
44 pdev: struct pwc_devive *
48 - Alvarado: adding whitebalance code
49 - Alistar Moire: QuickCam 3000 Pro device/product ID
50 - Tony Hoyle: Creative Labs Webcam 5 device/product ID
51 - Mark Burazin: solving hang in VIDIOCSYNC when camera gets unplugged
52 - Jk Fang: Sotec Afina Eye ID
53 - Xavier Roche: QuickCam Pro 4000 ID
54 - Jens Knudsen: QuickCam Zoom ID
55 - J. Debert: QuickCam for Notebooks ID
58 #include <linux/errno.h>
59 #include <linux/init.h>
61 #include <linux/module.h>
62 #include <linux/poll.h>
63 #include <linux/slab.h>
64 #include <linux/vmalloc.h>
65 #include <linux/version.h>
69 #include "pwc-kiara.h"
70 #include "pwc-timon.h"
71 #include "pwc-dec23.h"
73 #include "pwc-uncompress.h"
75 /* Function prototypes and driver templates */
77 /* hotplug device table support */
78 static const struct usb_device_id pwc_device_table [] = {
79 { USB_DEVICE(0x0471, 0x0302) }, /* Philips models */
80 { USB_DEVICE(0x0471, 0x0303) },
81 { USB_DEVICE(0x0471, 0x0304) },
82 { USB_DEVICE(0x0471, 0x0307) },
83 { USB_DEVICE(0x0471, 0x0308) },
84 { USB_DEVICE(0x0471, 0x030C) },
85 { USB_DEVICE(0x0471, 0x0310) },
86 { USB_DEVICE(0x0471, 0x0311) }, /* Philips ToUcam PRO II */
87 { USB_DEVICE(0x0471, 0x0312) },
88 { USB_DEVICE(0x0471, 0x0313) }, /* the 'new' 720K */
89 { USB_DEVICE(0x0471, 0x0329) }, /* Philips SPC 900NC PC Camera */
90 { USB_DEVICE(0x069A, 0x0001) }, /* Askey */
91 { USB_DEVICE(0x046D, 0x08B0) }, /* Logitech QuickCam Pro 3000 */
92 { USB_DEVICE(0x046D, 0x08B1) }, /* Logitech QuickCam Notebook Pro */
93 { USB_DEVICE(0x046D, 0x08B2) }, /* Logitech QuickCam Pro 4000 */
94 { USB_DEVICE(0x046D, 0x08B3) }, /* Logitech QuickCam Zoom (old model) */
95 { USB_DEVICE(0x046D, 0x08B4) }, /* Logitech QuickCam Zoom (new model) */
96 { USB_DEVICE(0x046D, 0x08B5) }, /* Logitech QuickCam Orbit/Sphere */
97 { USB_DEVICE(0x046D, 0x08B6) }, /* Cisco VT Camera */
98 { USB_DEVICE(0x046D, 0x08B7) }, /* Logitech ViewPort AV 100 */
99 { USB_DEVICE(0x046D, 0x08B8) }, /* Logitech (reserved) */
100 { USB_DEVICE(0x055D, 0x9000) }, /* Samsung MPC-C10 */
101 { USB_DEVICE(0x055D, 0x9001) }, /* Samsung MPC-C30 */
102 { USB_DEVICE(0x055D, 0x9002) }, /* Samsung SNC-35E (Ver3.0) */
103 { USB_DEVICE(0x041E, 0x400C) }, /* Creative Webcam 5 */
104 { USB_DEVICE(0x041E, 0x4011) }, /* Creative Webcam Pro Ex */
105 { USB_DEVICE(0x04CC, 0x8116) }, /* Afina Eye */
106 { USB_DEVICE(0x06BE, 0x8116) }, /* new Afina Eye */
107 { USB_DEVICE(0x0d81, 0x1910) }, /* Visionite */
108 { USB_DEVICE(0x0d81, 0x1900) },
111 MODULE_DEVICE_TABLE(usb, pwc_device_table);
113 static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id *id);
114 static void usb_pwc_disconnect(struct usb_interface *intf);
116 static struct usb_driver pwc_driver = {
117 .name = "Philips webcam", /* name */
118 .id_table = pwc_device_table,
119 .probe = usb_pwc_probe, /* probe() */
120 .disconnect = usb_pwc_disconnect, /* disconnect() */
123 #define MAX_DEV_HINTS 20
124 #define MAX_ISOC_ERRORS 20
126 static int default_size = PSZ_QCIF;
127 static int default_fps = 10;
128 static int default_fbufs = 3; /* Default number of frame buffers */
129 int pwc_mbufs = 2; /* Default number of mmap() buffers */
130 #ifdef CONFIG_USB_PWC_DEBUG
131 int pwc_trace = PWC_DEBUG_LEVEL;
133 static int power_save = 0;
134 static int led_on = 100, led_off = 0; /* defaults to LED that is on while in use */
135 static int pwc_preferred_compression = 1; /* 0..3 = uncompressed..high */
138 char serial_number[30];
140 struct pwc_device *pdev;
141 } device_hint[MAX_DEV_HINTS];
145 static int pwc_video_open(struct inode *inode, struct file *file);
146 static int pwc_video_close(struct inode *inode, struct file *file);
147 static ssize_t pwc_video_read(struct file *file, char __user *buf,
148 size_t count, loff_t *ppos);
149 static unsigned int pwc_video_poll(struct file *file, poll_table *wait);
150 static int pwc_video_ioctl(struct inode *inode, struct file *file,
151 unsigned int ioctlnr, unsigned long arg);
152 static int pwc_video_mmap(struct file *file, struct vm_area_struct *vma);
154 static const struct file_operations pwc_fops = {
155 .owner = THIS_MODULE,
156 .open = pwc_video_open,
157 .release = pwc_video_close,
158 .read = pwc_video_read,
159 .poll = pwc_video_poll,
160 .mmap = pwc_video_mmap,
161 .ioctl = pwc_video_ioctl,
162 .compat_ioctl = v4l_compat_ioctl32,
165 static struct video_device pwc_template = {
166 .owner = THIS_MODULE,
167 .name = "Philips Webcam", /* Filled in later */
168 .type = VID_TYPE_CAPTURE,
169 .hardware = VID_HARDWARE_PWC,
170 .release = video_device_release,
175 /***************************************************************************/
177 /* Okay, this is some magic that I worked out and the reasoning behind it...
179 The biggest problem with any USB device is of course: "what to do
180 when the user unplugs the device while it is in use by an application?"
181 We have several options:
182 1) Curse them with the 7 plagues when they do (requires divine intervention)
183 2) Tell them not to (won't work: they'll do it anyway)
184 3) Oops the kernel (this will have a negative effect on a user's uptime)
185 4) Do something sensible.
187 Of course, we go for option 4.
189 It happens that this device will be linked to two times, once from
190 usb_device and once from the video_device in their respective 'private'
191 pointers. This is done when the device is probed() and all initialization
192 succeeded. The pwc_device struct links back to both structures.
194 When a device is unplugged while in use it will be removed from the
195 list of known USB devices; I also de-register it as a V4L device, but
196 unfortunately I can't free the memory since the struct is still in use
197 by the file descriptor. This free-ing is then deferend until the first
198 opportunity. Crude, but it works.
200 A small 'advantage' is that if a user unplugs the cam and plugs it back
201 in, it should get assigned the same video device minor, but unfortunately
202 it's non-trivial to re-link the cam back to the video device... (that
203 would surely be magic! :))
206 /***************************************************************************/
207 /* Private functions */
209 /* Here we want the physical address of the memory.
210 * This is used when initializing the contents of the area.
215 static void *pwc_rvmalloc(unsigned long size)
220 mem=vmalloc_32(size);
224 memset(mem, 0, size); /* Clear the ram out, no junk to the user */
225 adr=(unsigned long) mem;
228 SetPageReserved(vmalloc_to_page((void *)adr));
235 static void pwc_rvfree(void * mem, unsigned long size)
242 adr=(unsigned long) mem;
243 while ((long) size > 0)
245 ClearPageReserved(vmalloc_to_page((void *)adr));
255 static int pwc_allocate_buffers(struct pwc_device *pdev)
260 PWC_DEBUG_MEMORY(">> pwc_allocate_buffers(pdev = 0x%p)\n", pdev);
265 /* Allocate Isochronuous pipe buffers */
266 for (i = 0; i < MAX_ISO_BUFS; i++) {
267 if (pdev->sbuf[i].data == NULL) {
268 kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
270 PWC_ERROR("Failed to allocate iso buffer %d.\n", i);
273 PWC_DEBUG_MEMORY("Allocated iso buffer at %p.\n", kbuf);
274 pdev->sbuf[i].data = kbuf;
278 /* Allocate frame buffer structure */
279 if (pdev->fbuf == NULL) {
280 kbuf = kzalloc(default_fbufs * sizeof(struct pwc_frame_buf), GFP_KERNEL);
282 PWC_ERROR("Failed to allocate frame buffer structure.\n");
285 PWC_DEBUG_MEMORY("Allocated frame buffer structure at %p.\n", kbuf);
289 /* create frame buffers, and make circular ring */
290 for (i = 0; i < default_fbufs; i++) {
291 if (pdev->fbuf[i].data == NULL) {
292 kbuf = vmalloc(PWC_FRAME_SIZE); /* need vmalloc since frame buffer > 128K */
294 PWC_ERROR("Failed to allocate frame buffer %d.\n", i);
297 PWC_DEBUG_MEMORY("Allocated frame buffer %d at %p.\n", i, kbuf);
298 pdev->fbuf[i].data = kbuf;
299 memset(kbuf, 0, PWC_FRAME_SIZE);
303 /* Allocate decompressor table space */
304 if (DEVICE_USE_CODEC1(pdev->type))
305 err = pwc_dec1_alloc(pdev);
307 err = pwc_dec23_alloc(pdev);
310 PWC_ERROR("Failed to allocate decompress table.\n");
314 /* Allocate image buffer; double buffer for mmap() */
315 kbuf = pwc_rvmalloc(pwc_mbufs * pdev->len_per_image);
317 PWC_ERROR("Failed to allocate image buffer(s). needed (%d)\n",
318 pwc_mbufs * pdev->len_per_image);
321 PWC_DEBUG_MEMORY("Allocated image buffer at %p.\n", kbuf);
322 pdev->image_data = kbuf;
323 for (i = 0; i < pwc_mbufs; i++) {
324 pdev->images[i].offset = i * pdev->len_per_image;
325 pdev->images[i].vma_use_count = 0;
327 for (; i < MAX_IMAGES; i++) {
328 pdev->images[i].offset = 0;
333 PWC_DEBUG_MEMORY("<< pwc_allocate_buffers()\n");
337 static void pwc_free_buffers(struct pwc_device *pdev)
341 PWC_DEBUG_MEMORY("Entering free_buffers(%p).\n", pdev);
345 /* Release Iso-pipe buffers */
346 for (i = 0; i < MAX_ISO_BUFS; i++)
347 if (pdev->sbuf[i].data != NULL) {
348 PWC_DEBUG_MEMORY("Freeing ISO buffer at %p.\n", pdev->sbuf[i].data);
349 kfree(pdev->sbuf[i].data);
350 pdev->sbuf[i].data = NULL;
353 /* The same for frame buffers */
354 if (pdev->fbuf != NULL) {
355 for (i = 0; i < default_fbufs; i++) {
356 if (pdev->fbuf[i].data != NULL) {
357 PWC_DEBUG_MEMORY("Freeing frame buffer %d at %p.\n", i, pdev->fbuf[i].data);
358 vfree(pdev->fbuf[i].data);
359 pdev->fbuf[i].data = NULL;
366 /* Intermediate decompression buffer & tables */
367 if (pdev->decompress_data != NULL) {
368 PWC_DEBUG_MEMORY("Freeing decompression buffer at %p.\n", pdev->decompress_data);
369 kfree(pdev->decompress_data);
370 pdev->decompress_data = NULL;
373 /* Release image buffers */
374 if (pdev->image_data != NULL) {
375 PWC_DEBUG_MEMORY("Freeing image buffer at %p.\n", pdev->image_data);
376 pwc_rvfree(pdev->image_data, pwc_mbufs * pdev->len_per_image);
378 pdev->image_data = NULL;
380 PWC_DEBUG_MEMORY("Leaving free_buffers().\n");
383 /* The frame & image buffer mess.
385 Yes, this is a mess. Well, it used to be simple, but alas... In this
386 module, 3 buffers schemes are used to get the data from the USB bus to
387 the user program. The first scheme involves the ISO buffers (called thus
388 since they transport ISO data from the USB controller), and not really
389 interesting. Suffices to say the data from this buffer is quickly
390 gathered in an interrupt handler (pwc_isoc_handler) and placed into the
393 The frame buffer is the second scheme, and is the central element here.
394 It collects the data from a single frame from the camera (hence, the
395 name). Frames are delimited by the USB camera with a short USB packet,
396 so that's easy to detect. The frame buffers form a list that is filled
397 by the camera+USB controller and drained by the user process through
398 either read() or mmap().
400 The image buffer is the third scheme, in which frames are decompressed
401 and converted into planar format. For mmap() there is more than
402 one image buffer available.
404 The frame buffers provide the image buffering. In case the user process
405 is a bit slow, this introduces lag and some undesired side-effects.
406 The problem arises when the frame buffer is full. I used to drop the last
407 frame, which makes the data in the queue stale very quickly. But dropping
408 the frame at the head of the queue proved to be a litte bit more difficult.
409 I tried a circular linked scheme, but this introduced more problems than
412 Because filling and draining are completely asynchronous processes, this
413 requires some fiddling with pointers and mutexes.
415 Eventually, I came up with a system with 2 lists: an 'empty' frame list
416 and a 'full' frame list:
417 * Initially, all frame buffers but one are on the 'empty' list; the one
418 remaining buffer is our initial fill frame.
419 * If a frame is needed for filling, we try to take it from the 'empty'
420 list, unless that list is empty, in which case we take the buffer at
421 the head of the 'full' list.
422 * When our fill buffer has been filled, it is appended to the 'full'
424 * If a frame is needed by read() or mmap(), it is taken from the head of
425 the 'full' list, handled, and then appended to the 'empty' list. If no
426 buffer is present on the 'full' list, we wait.
427 The advantage is that the buffer that is currently being decompressed/
428 converted, is on neither list, and thus not in our way (any other scheme
429 I tried had the problem of old data lingering in the queue).
431 Whatever strategy you choose, it always remains a tradeoff: with more
432 frame buffers the chances of a missed frame are reduced. On the other
433 hand, on slower machines it introduces lag because the queue will
438 \brief Find next frame buffer to fill. Take from empty or full list, whichever comes first.
440 static int pwc_next_fill_frame(struct pwc_device *pdev)
446 spin_lock_irqsave(&pdev->ptrlock, flags);
447 if (pdev->fill_frame != NULL) {
448 /* append to 'full' list */
449 if (pdev->full_frames == NULL) {
450 pdev->full_frames = pdev->fill_frame;
451 pdev->full_frames_tail = pdev->full_frames;
454 pdev->full_frames_tail->next = pdev->fill_frame;
455 pdev->full_frames_tail = pdev->fill_frame;
458 if (pdev->empty_frames != NULL) {
459 /* We have empty frames available. That's easy */
460 pdev->fill_frame = pdev->empty_frames;
461 pdev->empty_frames = pdev->empty_frames->next;
464 /* Hmm. Take it from the full list */
466 if (pdev->full_frames == NULL) {
467 PWC_ERROR("Neither empty or full frames available!\n");
468 spin_unlock_irqrestore(&pdev->ptrlock, flags);
471 pdev->fill_frame = pdev->full_frames;
472 pdev->full_frames = pdev->full_frames->next;
475 pdev->fill_frame->next = NULL;
476 spin_unlock_irqrestore(&pdev->ptrlock, flags);
482 \brief Reset all buffers, pointers and lists, except for the image_used[] buffer.
484 If the image_used[] buffer is cleared too, mmap()/VIDIOCSYNC will run into trouble.
486 static void pwc_reset_buffers(struct pwc_device *pdev)
491 PWC_DEBUG_MEMORY(">> %s __enter__\n", __FUNCTION__);
493 spin_lock_irqsave(&pdev->ptrlock, flags);
494 pdev->full_frames = NULL;
495 pdev->full_frames_tail = NULL;
496 for (i = 0; i < default_fbufs; i++) {
497 pdev->fbuf[i].filled = 0;
499 pdev->fbuf[i].next = &pdev->fbuf[i - 1];
501 pdev->fbuf->next = NULL;
503 pdev->empty_frames = &pdev->fbuf[default_fbufs - 1];
504 pdev->empty_frames_tail = pdev->fbuf;
505 pdev->read_frame = NULL;
506 pdev->fill_frame = pdev->empty_frames;
507 pdev->empty_frames = pdev->empty_frames->next;
509 pdev->image_read_pos = 0;
510 pdev->fill_image = 0;
511 spin_unlock_irqrestore(&pdev->ptrlock, flags);
513 PWC_DEBUG_MEMORY("<< %s __leaving__\n", __FUNCTION__);
518 \brief Do all the handling for getting one frame: get pointer, decompress, advance pointers.
520 int pwc_handle_frame(struct pwc_device *pdev)
525 spin_lock_irqsave(&pdev->ptrlock, flags);
526 /* First grab our read_frame; this is removed from all lists, so
527 we can release the lock after this without problems */
528 if (pdev->read_frame != NULL) {
529 /* This can't theoretically happen */
530 PWC_ERROR("Huh? Read frame still in use?\n");
531 spin_unlock_irqrestore(&pdev->ptrlock, flags);
536 if (pdev->full_frames == NULL) {
537 PWC_ERROR("Woops. No frames ready.\n");
540 pdev->read_frame = pdev->full_frames;
541 pdev->full_frames = pdev->full_frames->next;
542 pdev->read_frame->next = NULL;
545 if (pdev->read_frame != NULL) {
546 /* Decompression is a lenghty process, so it's outside of the lock.
547 This gives the isoc_handler the opportunity to fill more frames
550 spin_unlock_irqrestore(&pdev->ptrlock, flags);
551 ret = pwc_decompress(pdev);
552 spin_lock_irqsave(&pdev->ptrlock, flags);
554 /* We're done with read_buffer, tack it to the end of the empty buffer list */
555 if (pdev->empty_frames == NULL) {
556 pdev->empty_frames = pdev->read_frame;
557 pdev->empty_frames_tail = pdev->empty_frames;
560 pdev->empty_frames_tail->next = pdev->read_frame;
561 pdev->empty_frames_tail = pdev->read_frame;
563 pdev->read_frame = NULL;
565 spin_unlock_irqrestore(&pdev->ptrlock, flags);
570 \brief Advance pointers of image buffer (after each user request)
572 void pwc_next_image(struct pwc_device *pdev)
574 pdev->image_used[pdev->fill_image] = 0;
575 pdev->fill_image = (pdev->fill_image + 1) % pwc_mbufs;
579 * Print debug information when a frame is discarded because all of our buffer
582 static void pwc_frame_dumped(struct pwc_device *pdev)
584 pdev->vframes_dumped++;
585 if (pdev->vframe_count < FRAME_LOWMARK)
588 if (pdev->vframes_dumped < 20)
589 PWC_DEBUG_FLOW("Dumping frame %d\n", pdev->vframe_count);
590 else if (pdev->vframes_dumped == 20)
591 PWC_DEBUG_FLOW("Dumping frame %d (last message)\n",
595 static int pwc_rcv_short_packet(struct pwc_device *pdev, const struct pwc_frame_buf *fbuf)
599 /* The ToUCam Fun CMOS sensor causes the firmware to send 2 or 3 bogus
600 frames on the USB wire after an exposure change. This conditition is
601 however detected in the cam and a bit is set in the header.
603 if (pdev->type == 730) {
604 unsigned char *ptr = (unsigned char *)fbuf->data;
606 if (ptr[1] == 1 && ptr[0] & 0x10) {
607 PWC_TRACE("Hyundai CMOS sensor bug. Dropping frame.\n");
608 pdev->drop_frames += 2;
609 pdev->vframes_error++;
611 if ((ptr[0] ^ pdev->vmirror) & 0x01) {
613 pdev->snapshot_button_status = 1;
614 PWC_TRACE("Snapshot button pressed.\n");
617 PWC_TRACE("Snapshot button released.\n");
620 if ((ptr[0] ^ pdev->vmirror) & 0x02) {
622 PWC_TRACE("Image is mirrored.\n");
624 PWC_TRACE("Image is normal.\n");
626 pdev->vmirror = ptr[0] & 0x03;
627 /* Sometimes the trailer of the 730 is still sent as a 4 byte packet
628 after a short frame; this condition is filtered out specifically. A 4 byte
629 frame doesn't make sense anyway.
630 So we get either this sequence:
631 drop_bit set -> 4 byte frame -> short frame -> good frame
633 drop_bit set -> short frame -> good frame
634 So we drop either 3 or 2 frames in all!
636 if (fbuf->filled == 4)
639 else if (pdev->type == 740 || pdev->type == 720) {
640 unsigned char *ptr = (unsigned char *)fbuf->data;
641 if ((ptr[0] ^ pdev->vmirror) & 0x01) {
643 pdev->snapshot_button_status = 1;
644 PWC_TRACE("Snapshot button pressed.\n");
647 PWC_TRACE("Snapshot button released.\n");
649 pdev->vmirror = ptr[0] & 0x03;
652 /* In case we were instructed to drop the frame, do so silently.
653 The buffer pointers are not updated either (but the counters are reset below).
655 if (pdev->drop_frames > 0)
658 /* Check for underflow first */
659 if (fbuf->filled < pdev->frame_total_size) {
660 PWC_DEBUG_FLOW("Frame buffer underflow (%d bytes);"
661 " discarded.\n", fbuf->filled);
662 pdev->vframes_error++;
665 /* Send only once per EOF */
666 awake = 1; /* delay wake_ups */
668 /* Find our next frame to fill. This will always succeed, since we
669 * nick a frame from either empty or full list, but if we had to
670 * take it from the full list, it means a frame got dropped.
672 if (pwc_next_fill_frame(pdev))
673 pwc_frame_dumped(pdev);
677 pdev->vframe_count++;
681 /* This gets called for the Isochronous pipe (video). This is done in
682 * interrupt time, so it has to be fast, not crash, and not stall. Neat.
684 static void pwc_isoc_handler(struct urb *urb)
686 struct pwc_device *pdev;
689 struct pwc_frame_buf *fbuf;
690 unsigned char *fillptr = NULL, *iso_buf = NULL;
693 pdev = (struct pwc_device *)urb->context;
695 PWC_ERROR("isoc_handler() called with NULL device?!\n");
699 if (urb->status == -ENOENT || urb->status == -ECONNRESET) {
700 PWC_DEBUG_OPEN("URB (%p) unlinked %ssynchronuously.\n", urb, urb->status == -ENOENT ? "" : "a");
703 if (urb->status != -EINPROGRESS && urb->status != 0) {
707 switch(urb->status) {
708 case -ENOSR: errmsg = "Buffer error (overrun)"; break;
709 case -EPIPE: errmsg = "Stalled (device not responding)"; break;
710 case -EOVERFLOW: errmsg = "Babble (bad cable?)"; break;
711 case -EPROTO: errmsg = "Bit-stuff error (bad cable?)"; break;
712 case -EILSEQ: errmsg = "CRC/Timeout (could be anything)"; break;
713 case -ETIME: errmsg = "Device does not respond"; break;
715 PWC_DEBUG_FLOW("pwc_isoc_handler() called with status %d [%s].\n", urb->status, errmsg);
716 /* Give up after a number of contiguous errors on the USB bus.
717 Appearantly something is wrong so we simulate an unplug event.
719 if (++pdev->visoc_errors > MAX_ISOC_ERRORS)
721 PWC_INFO("Too many ISOC errors, bailing out.\n");
722 pdev->error_status = EIO;
724 wake_up_interruptible(&pdev->frameq);
726 goto handler_end; // ugly, but practical
729 fbuf = pdev->fill_frame;
731 PWC_ERROR("pwc_isoc_handler without valid fill frame.\n");
736 fillptr = fbuf->data + fbuf->filled;
739 /* Reset ISOC error counter. We did get here, after all. */
740 pdev->visoc_errors = 0;
742 /* vsync: 0 = don't copy data
747 for (i = 0; i < urb->number_of_packets; i++) {
748 fst = urb->iso_frame_desc[i].status;
749 flen = urb->iso_frame_desc[i].actual_length;
750 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
752 if (flen > 0) { /* if valid data... */
753 if (pdev->vsync > 0) { /* ...and we are not sync-hunting... */
756 /* ...copy data to frame buffer, if possible */
757 if (flen + fbuf->filled > pdev->frame_total_size) {
758 PWC_DEBUG_FLOW("Frame buffer overflow (flen = %d, frame_total_size = %d).\n", flen, pdev->frame_total_size);
759 pdev->vsync = 0; /* Hmm, let's wait for an EOF (end-of-frame) */
760 pdev->vframes_error++;
763 memmove(fillptr, iso_buf, flen);
767 fbuf->filled += flen;
770 if (flen < pdev->vlast_packet_size) {
771 /* Shorter packet... We probably have the end of an image-frame;
772 wake up read() process and let select()/poll() do something.
773 Decompression is done in user time over there.
775 if (pdev->vsync == 2) {
776 if (pwc_rcv_short_packet(pdev, fbuf)) {
778 fbuf = pdev->fill_frame;
782 fillptr = fbuf->data;
786 pdev->vlast_packet_size = flen;
787 } /* ..status == 0 */
789 /* This is normally not interesting to the user, unless
790 * you are really debugging something */
791 static int iso_error = 0;
794 PWC_DEBUG_FLOW("Iso frame %d of USB has error %d\n", i, fst);
800 wake_up_interruptible(&pdev->frameq);
802 urb->dev = pdev->udev;
803 i = usb_submit_urb(urb, GFP_ATOMIC);
805 PWC_ERROR("Error (%d) re-submitting urb in pwc_isoc_handler.\n", i);
809 int pwc_isoc_init(struct pwc_device *pdev)
811 struct usb_device *udev;
815 struct usb_interface *intf;
816 struct usb_host_interface *idesc = NULL;
825 /* Get the current alternate interface, adjust packet size */
826 if (!udev->actconfig)
828 intf = usb_ifnum_to_if(udev, 0);
830 idesc = usb_altnum_to_altsetting(intf, pdev->valternate);
835 /* Search video endpoint */
836 pdev->vmax_packet_size = -1;
837 for (i = 0; i < idesc->desc.bNumEndpoints; i++) {
838 if ((idesc->endpoint[i].desc.bEndpointAddress & 0xF) == pdev->vendpoint) {
839 pdev->vmax_packet_size = le16_to_cpu(idesc->endpoint[i].desc.wMaxPacketSize);
844 if (pdev->vmax_packet_size < 0 || pdev->vmax_packet_size > ISO_MAX_FRAME_SIZE) {
845 PWC_ERROR("Failed to find packet size for video endpoint in current alternate setting.\n");
846 return -ENFILE; /* Odd error, that should be noticeable */
849 /* Set alternate interface */
851 PWC_DEBUG_OPEN("Setting alternate interface %d\n", pdev->valternate);
852 ret = usb_set_interface(pdev->udev, 0, pdev->valternate);
856 for (i = 0; i < MAX_ISO_BUFS; i++) {
857 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
859 PWC_ERROR("Failed to allocate urb %d\n", i);
863 pdev->sbuf[i].urb = urb;
864 PWC_DEBUG_MEMORY("Allocated URB at 0x%p\n", urb);
867 /* De-allocate in reverse order */
869 usb_free_urb(pdev->sbuf[i].urb);
870 pdev->sbuf[i].urb = NULL;
875 /* init URB structure */
876 for (i = 0; i < MAX_ISO_BUFS; i++) {
877 urb = pdev->sbuf[i].urb;
879 urb->interval = 1; // devik
881 urb->pipe = usb_rcvisocpipe(udev, pdev->vendpoint);
882 urb->transfer_flags = URB_ISO_ASAP;
883 urb->transfer_buffer = pdev->sbuf[i].data;
884 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
885 urb->complete = pwc_isoc_handler;
887 urb->start_frame = 0;
888 urb->number_of_packets = ISO_FRAMES_PER_DESC;
889 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
890 urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
891 urb->iso_frame_desc[j].length = pdev->vmax_packet_size;
896 for (i = 0; i < MAX_ISO_BUFS; i++) {
897 ret = usb_submit_urb(pdev->sbuf[i].urb, GFP_KERNEL);
899 PWC_ERROR("isoc_init() submit_urb %d failed with error %d\n", i, ret);
901 PWC_DEBUG_MEMORY("URB 0x%p submitted.\n", pdev->sbuf[i].urb);
906 PWC_DEBUG_OPEN("<< pwc_isoc_init()\n");
910 void pwc_isoc_cleanup(struct pwc_device *pdev)
914 PWC_DEBUG_OPEN(">> pwc_isoc_cleanup()\n");
917 if (pdev->iso_init == 0)
920 /* Unlinking ISOC buffers one by one */
921 for (i = 0; i < MAX_ISO_BUFS; i++) {
924 urb = pdev->sbuf[i].urb;
926 if (pdev->iso_init) {
927 PWC_DEBUG_MEMORY("Unlinking URB %p\n", urb);
930 PWC_DEBUG_MEMORY("Freeing URB\n");
932 pdev->sbuf[i].urb = NULL;
936 /* Stop camera, but only if we are sure the camera is still there (unplug
937 is signalled by EPIPE)
939 if (pdev->error_status && pdev->error_status != EPIPE) {
940 PWC_DEBUG_OPEN("Setting alternate interface 0.\n");
941 usb_set_interface(pdev->udev, 0, 0);
945 PWC_DEBUG_OPEN("<< pwc_isoc_cleanup()\n");
948 int pwc_try_video_mode(struct pwc_device *pdev, int width, int height, int new_fps, int new_compression, int new_snapshot)
952 /* Stop isoc stuff */
953 pwc_isoc_cleanup(pdev);
954 /* Reset parameters */
955 pwc_reset_buffers(pdev);
956 /* Try to set video mode... */
957 start = ret = pwc_set_video_mode(pdev, width, height, new_fps, new_compression, new_snapshot);
959 PWC_DEBUG_FLOW("pwc_set_video_mode attempt 1 failed.\n");
960 /* That failed... restore old mode (we know that worked) */
961 start = pwc_set_video_mode(pdev, pdev->view.x, pdev->view.y, pdev->vframes, pdev->vcompression, pdev->vsnapshot);
963 PWC_DEBUG_FLOW("pwc_set_video_mode attempt 2 failed.\n");
968 if (pwc_isoc_init(pdev) < 0)
970 PWC_WARNING("Failed to restart ISOC transfers in pwc_try_video_mode.\n");
971 ret = -EAGAIN; /* let's try again, who knows if it works a second time */
974 pdev->drop_frames++; /* try to avoid garbage during switch */
975 return ret; /* Return original error code */
981 static struct pwc_device *cd_to_pwc(struct class_device *cd)
983 struct video_device *vdev = to_video_device(cd);
984 return video_get_drvdata(vdev);
987 static ssize_t show_pan_tilt(struct class_device *class_dev, char *buf)
989 struct pwc_device *pdev = cd_to_pwc(class_dev);
990 return sprintf(buf, "%d %d\n", pdev->pan_angle, pdev->tilt_angle);
993 static ssize_t store_pan_tilt(struct class_device *class_dev, const char *buf,
996 struct pwc_device *pdev = cd_to_pwc(class_dev);
1000 if (strncmp(buf, "reset", 5) == 0)
1001 ret = pwc_mpt_reset(pdev, 0x3);
1003 else if (sscanf(buf, "%d %d", &pan, &tilt) > 0)
1004 ret = pwc_mpt_set_angle(pdev, pan, tilt);
1010 static CLASS_DEVICE_ATTR(pan_tilt, S_IRUGO | S_IWUSR, show_pan_tilt,
1013 static ssize_t show_snapshot_button_status(struct class_device *class_dev, char *buf)
1015 struct pwc_device *pdev = cd_to_pwc(class_dev);
1016 int status = pdev->snapshot_button_status;
1017 pdev->snapshot_button_status = 0;
1018 return sprintf(buf, "%d\n", status);
1021 static CLASS_DEVICE_ATTR(button, S_IRUGO | S_IWUSR, show_snapshot_button_status,
1024 static int pwc_create_sysfs_files(struct video_device *vdev)
1026 struct pwc_device *pdev = video_get_drvdata(vdev);
1029 rc = video_device_create_file(vdev, &class_device_attr_button);
1032 if (pdev->features & FEATURE_MOTOR_PANTILT) {
1033 rc = video_device_create_file(vdev,&class_device_attr_pan_tilt);
1034 if (rc) goto err_button;
1040 video_device_remove_file(vdev, &class_device_attr_button);
1045 static void pwc_remove_sysfs_files(struct video_device *vdev)
1047 struct pwc_device *pdev = video_get_drvdata(vdev);
1048 if (pdev->features & FEATURE_MOTOR_PANTILT)
1049 video_device_remove_file(vdev, &class_device_attr_pan_tilt);
1050 video_device_remove_file(vdev, &class_device_attr_button);
1053 #ifdef CONFIG_USB_PWC_DEBUG
1054 static const char *pwc_sensor_type_to_string(unsigned int sensor_type)
1056 switch(sensor_type) {
1058 return "Hyundai CMOS sensor";
1060 return "Sony CCD sensor + TDA8787";
1062 return "Sony CCD sensor + Exas 98L59";
1064 return "Sony CCD sensor + ADI 9804";
1066 return "Sharp CCD sensor + TDA8787";
1068 return "Sharp CCD sensor + Exas 98L59";
1070 return "Sharp CCD sensor + ADI 9804";
1072 return "UPA 1021 sensor";
1074 return "VGA sensor";
1076 return "PAL MR sensor";
1078 return "unknown type of sensor";
1083 /***************************************************************************/
1084 /* Video4Linux functions */
1086 static int pwc_video_open(struct inode *inode, struct file *file)
1089 struct video_device *vdev = video_devdata(file);
1090 struct pwc_device *pdev;
1092 PWC_DEBUG_OPEN(">> video_open called(vdev = 0x%p).\n", vdev);
1094 pdev = (struct pwc_device *)vdev->priv;
1097 PWC_DEBUG_OPEN("I'm busy, someone is using the device.\n");
1101 mutex_lock(&pdev->modlock);
1102 if (!pdev->usb_init) {
1103 PWC_DEBUG_OPEN("Doing first time initialization.\n");
1106 /* Query sensor type */
1107 ret = pwc_get_cmos_sensor(pdev, &i);
1110 PWC_DEBUG_OPEN("This %s camera is equipped with a %s (%d).\n",
1112 pwc_sensor_type_to_string(i), i);
1116 /* Turn on camera */
1118 i = pwc_camera_power(pdev, 1);
1120 PWC_DEBUG_OPEN("Failed to restore power to the camera! (%d)\n", i);
1122 /* Set LED on/off time */
1123 if (pwc_set_leds(pdev, led_on, led_off) < 0)
1124 PWC_DEBUG_OPEN("Failed to set LED on/off time.\n");
1126 pwc_construct(pdev); /* set min/max sizes correct */
1128 /* So far, so good. Allocate memory. */
1129 i = pwc_allocate_buffers(pdev);
1131 PWC_DEBUG_OPEN("Failed to allocate buffers memory.\n");
1132 pwc_free_buffers(pdev);
1133 mutex_unlock(&pdev->modlock);
1137 /* Reset buffers & parameters */
1138 pwc_reset_buffers(pdev);
1139 for (i = 0; i < pwc_mbufs; i++)
1140 pdev->image_used[i] = 0;
1141 pdev->vframe_count = 0;
1142 pdev->vframes_dumped = 0;
1143 pdev->vframes_error = 0;
1144 pdev->visoc_errors = 0;
1145 pdev->error_status = 0;
1146 pwc_construct(pdev); /* set min/max sizes correct */
1148 /* Set some defaults */
1149 pdev->vsnapshot = 0;
1151 /* Start iso pipe for video; first try the last used video size
1152 (or the default one); if that fails try QCIF/10 or QSIF/10;
1153 it that fails too, give up.
1155 i = pwc_set_video_mode(pdev, pwc_image_sizes[pdev->vsize].x, pwc_image_sizes[pdev->vsize].y, pdev->vframes, pdev->vcompression, 0);
1157 unsigned int default_resolution;
1158 PWC_DEBUG_OPEN("First attempt at set_video_mode failed.\n");
1159 if (pdev->type>= 730)
1160 default_resolution = PSZ_QSIF;
1162 default_resolution = PSZ_QCIF;
1164 i = pwc_set_video_mode(pdev,
1165 pwc_image_sizes[default_resolution].x,
1166 pwc_image_sizes[default_resolution].y,
1172 PWC_DEBUG_OPEN("Second attempt at set_video_mode failed.\n");
1173 pwc_free_buffers(pdev);
1174 mutex_unlock(&pdev->modlock);
1178 i = pwc_isoc_init(pdev);
1180 PWC_DEBUG_OPEN("Failed to init ISOC stuff = %d.\n", i);
1181 pwc_isoc_cleanup(pdev);
1182 pwc_free_buffers(pdev);
1183 mutex_unlock(&pdev->modlock);
1187 /* Initialize the webcam to sane value */
1188 pwc_set_brightness(pdev, 0x7fff);
1189 pwc_set_agc(pdev, 1, 0);
1192 file->private_data = vdev;
1193 mutex_unlock(&pdev->modlock);
1194 PWC_DEBUG_OPEN("<< video_open() returns 0.\n");
1199 static void pwc_cleanup(struct pwc_device *pdev)
1201 pwc_remove_sysfs_files(pdev->vdev);
1202 video_unregister_device(pdev->vdev);
1205 /* Note that all cleanup is done in the reverse order as in _open */
1206 static int pwc_video_close(struct inode *inode, struct file *file)
1208 struct video_device *vdev = file->private_data;
1209 struct pwc_device *pdev;
1212 PWC_DEBUG_OPEN(">> video_close called(vdev = 0x%p).\n", vdev);
1214 pdev = (struct pwc_device *)vdev->priv;
1215 if (pdev->vopen == 0)
1216 PWC_DEBUG_MODULE("video_close() called on closed device?\n");
1218 /* Dump statistics, but only if a reasonable amount of frames were
1219 processed (to prevent endless log-entries in case of snap-shot
1222 if (pdev->vframe_count > 20)
1223 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);
1225 if (DEVICE_USE_CODEC1(pdev->type))
1230 pwc_isoc_cleanup(pdev);
1231 pwc_free_buffers(pdev);
1234 /* Turn off LEDS and power down camera, but only when not unplugged */
1235 if (!pdev->unplugged) {
1237 if (pwc_set_leds(pdev, 0, 0) < 0)
1238 PWC_DEBUG_MODULE("Failed to set LED on/off time.\n");
1240 i = pwc_camera_power(pdev, 0);
1242 PWC_ERROR("Failed to power down camera (%d)\n", i);
1245 PWC_DEBUG_OPEN("<< video_close() vopen=%d\n", pdev->vopen);
1248 /* Free memory (don't set pdev to 0 just yet) */
1250 /* search device_hint[] table if we occupy a slot, by any chance */
1251 for (hint = 0; hint < MAX_DEV_HINTS; hint++)
1252 if (device_hint[hint].pdev == pdev)
1253 device_hint[hint].pdev = NULL;
1261 * FIXME: what about two parallel reads ????
1262 * ANSWER: Not supported. You can't open the device more than once,
1263 despite what the V4L1 interface says. First, I don't see
1264 the need, second there's no mechanism of alerting the
1265 2nd/3rd/... process of events like changing image size.
1266 And I don't see the point of blocking that for the
1267 2nd/3rd/... process.
1268 In multi-threaded environments reading parallel from any
1269 device is tricky anyhow.
1272 static ssize_t pwc_video_read(struct file *file, char __user *buf,
1273 size_t count, loff_t *ppos)
1275 struct video_device *vdev = file->private_data;
1276 struct pwc_device *pdev;
1277 int noblock = file->f_flags & O_NONBLOCK;
1278 DECLARE_WAITQUEUE(wait, current);
1280 void *image_buffer_addr;
1282 PWC_DEBUG_READ("pwc_video_read(vdev=0x%p, buf=%p, count=%zd) called.\n",
1289 if (pdev->error_status)
1290 return -pdev->error_status; /* Something happened, report what. */
1292 /* In case we're doing partial reads, we don't have to wait for a frame */
1293 if (pdev->image_read_pos == 0) {
1294 /* Do wait queueing according to the (doc)book */
1295 add_wait_queue(&pdev->frameq, &wait);
1296 while (pdev->full_frames == NULL) {
1297 /* Check for unplugged/etc. here */
1298 if (pdev->error_status) {
1299 remove_wait_queue(&pdev->frameq, &wait);
1300 set_current_state(TASK_RUNNING);
1301 return -pdev->error_status ;
1304 remove_wait_queue(&pdev->frameq, &wait);
1305 set_current_state(TASK_RUNNING);
1306 return -EWOULDBLOCK;
1308 if (signal_pending(current)) {
1309 remove_wait_queue(&pdev->frameq, &wait);
1310 set_current_state(TASK_RUNNING);
1311 return -ERESTARTSYS;
1314 set_current_state(TASK_INTERRUPTIBLE);
1316 remove_wait_queue(&pdev->frameq, &wait);
1317 set_current_state(TASK_RUNNING);
1319 /* Decompress and release frame */
1320 if (pwc_handle_frame(pdev))
1324 PWC_DEBUG_READ("Copying data to user space.\n");
1325 if (pdev->vpalette == VIDEO_PALETTE_RAW)
1326 bytes_to_read = pdev->frame_size + sizeof(struct pwc_raw_frame);
1328 bytes_to_read = pdev->view.size;
1330 /* copy bytes to user space; we allow for partial reads */
1331 if (count + pdev->image_read_pos > bytes_to_read)
1332 count = bytes_to_read - pdev->image_read_pos;
1333 image_buffer_addr = pdev->image_data;
1334 image_buffer_addr += pdev->images[pdev->fill_image].offset;
1335 image_buffer_addr += pdev->image_read_pos;
1336 if (copy_to_user(buf, image_buffer_addr, count))
1338 pdev->image_read_pos += count;
1339 if (pdev->image_read_pos >= bytes_to_read) { /* All data has been read */
1340 pdev->image_read_pos = 0;
1341 pwc_next_image(pdev);
1346 static unsigned int pwc_video_poll(struct file *file, poll_table *wait)
1348 struct video_device *vdev = file->private_data;
1349 struct pwc_device *pdev;
1357 poll_wait(file, &pdev->frameq, wait);
1358 if (pdev->error_status)
1360 if (pdev->full_frames != NULL) /* we have frames waiting */
1361 return (POLLIN | POLLRDNORM);
1366 static int pwc_video_ioctl(struct inode *inode, struct file *file,
1367 unsigned int cmd, unsigned long arg)
1369 return video_usercopy(inode, file, cmd, arg, pwc_video_do_ioctl);
1372 static int pwc_video_mmap(struct file *file, struct vm_area_struct *vma)
1374 struct video_device *vdev = file->private_data;
1375 struct pwc_device *pdev;
1376 unsigned long start;
1378 unsigned long page, pos = 0;
1381 PWC_DEBUG_MEMORY(">> %s\n", __FUNCTION__);
1383 size = vma->vm_end - vma->vm_start;
1384 start = vma->vm_start;
1386 /* Find the idx buffer for this mapping */
1387 for (index = 0; index < pwc_mbufs; index++) {
1388 pos = pdev->images[index].offset;
1389 if ((pos>>PAGE_SHIFT) == vma->vm_pgoff)
1392 if (index == MAX_IMAGES)
1396 * Special case for v4l1. In v4l1, we map only one big buffer,
1397 * but in v4l2 each buffer is mapped
1399 unsigned long total_size;
1400 total_size = pwc_mbufs * pdev->len_per_image;
1401 if (size != pdev->len_per_image && size != total_size) {
1402 PWC_ERROR("Wrong size (%lu) needed to be len_per_image=%d or total_size=%lu\n",
1403 size, pdev->len_per_image, total_size);
1406 } else if (size > pdev->len_per_image)
1409 vma->vm_flags |= VM_IO; /* from 2.6.9-acX */
1411 pos += (unsigned long)pdev->image_data;
1413 page = vmalloc_to_pfn((void *)pos);
1414 if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED))
1418 if (size > PAGE_SIZE)
1426 /***************************************************************************/
1429 /* This function gets called when a new device is plugged in or the usb core
1433 static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id *id)
1435 struct usb_device *udev = interface_to_usbdev(intf);
1436 struct pwc_device *pdev = NULL;
1437 int vendor_id, product_id, type_id;
1440 int video_nr = -1; /* default: use next available device */
1441 char serial_number[30], *name;
1443 vendor_id = le16_to_cpu(udev->descriptor.idVendor);
1444 product_id = le16_to_cpu(udev->descriptor.idProduct);
1446 /* Check if we can handle this device */
1447 PWC_DEBUG_PROBE("probe() called [%04X %04X], if %d\n",
1448 vendor_id, product_id,
1449 intf->altsetting->desc.bInterfaceNumber);
1451 /* the interfaces are probed one by one. We are only interested in the
1452 video interface (0) now.
1453 Interface 1 is the Audio Control, and interface 2 Audio itself.
1455 if (intf->altsetting->desc.bInterfaceNumber > 0)
1458 if (vendor_id == 0x0471) {
1459 switch (product_id) {
1461 PWC_INFO("Philips PCA645VC USB webcam detected.\n");
1462 name = "Philips 645 webcam";
1466 PWC_INFO("Philips PCA646VC USB webcam detected.\n");
1467 name = "Philips 646 webcam";
1471 PWC_INFO("Askey VC010 type 2 USB webcam detected.\n");
1472 name = "Askey VC010 webcam";
1476 PWC_INFO("Philips PCVC675K (Vesta) USB webcam detected.\n");
1477 name = "Philips 675 webcam";
1481 PWC_INFO("Philips PCVC680K (Vesta Pro) USB webcam detected.\n");
1482 name = "Philips 680 webcam";
1486 PWC_INFO("Philips PCVC690K (Vesta Pro Scan) USB webcam detected.\n");
1487 name = "Philips 690 webcam";
1491 PWC_INFO("Philips PCVC730K (ToUCam Fun)/PCVC830 (ToUCam II) USB webcam detected.\n");
1492 name = "Philips 730 webcam";
1496 PWC_INFO("Philips PCVC740K (ToUCam Pro)/PCVC840 (ToUCam II) USB webcam detected.\n");
1497 name = "Philips 740 webcam";
1501 PWC_INFO("Philips PCVC750K (ToUCam Pro Scan) USB webcam detected.\n");
1502 name = "Philips 750 webcam";
1506 PWC_INFO("Philips PCVC720K/40 (ToUCam XS) USB webcam detected.\n");
1507 name = "Philips 720K/40 webcam";
1511 PWC_INFO("Philips SPC 900NC USB webcam detected.\n");
1512 name = "Philips SPC 900NC webcam";
1520 else if (vendor_id == 0x069A) {
1521 switch(product_id) {
1523 PWC_INFO("Askey VC010 type 1 USB webcam detected.\n");
1524 name = "Askey VC010 webcam";
1532 else if (vendor_id == 0x046d) {
1533 switch(product_id) {
1535 PWC_INFO("Logitech QuickCam Pro 3000 USB webcam detected.\n");
1536 name = "Logitech QuickCam Pro 3000";
1537 type_id = 740; /* CCD sensor */
1540 PWC_INFO("Logitech QuickCam Notebook Pro USB webcam detected.\n");
1541 name = "Logitech QuickCam Notebook Pro";
1542 type_id = 740; /* CCD sensor */
1545 PWC_INFO("Logitech QuickCam 4000 Pro USB webcam detected.\n");
1546 name = "Logitech QuickCam Pro 4000";
1547 type_id = 740; /* CCD sensor */
1550 PWC_INFO("Logitech QuickCam Zoom USB webcam detected.\n");
1551 name = "Logitech QuickCam Zoom";
1552 type_id = 740; /* CCD sensor */
1555 PWC_INFO("Logitech QuickCam Zoom (new model) USB webcam detected.\n");
1556 name = "Logitech QuickCam Zoom";
1557 type_id = 740; /* CCD sensor */
1561 PWC_INFO("Logitech QuickCam Orbit/Sphere USB webcam detected.\n");
1562 name = "Logitech QuickCam Orbit";
1563 type_id = 740; /* CCD sensor */
1564 features |= FEATURE_MOTOR_PANTILT;
1567 PWC_INFO("Logitech/Cisco VT Camera webcam detected.\n");
1568 name = "Cisco VT Camera";
1569 type_id = 740; /* CCD sensor */
1572 PWC_INFO("Logitech ViewPort AV 100 webcam detected.\n");
1573 name = "Logitech ViewPort AV 100";
1574 type_id = 740; /* CCD sensor */
1576 case 0x08b8: /* Where this released? */
1577 PWC_INFO("Logitech QuickCam detected (reserved ID).\n");
1578 name = "Logitech QuickCam (res.)";
1579 type_id = 730; /* Assuming CMOS */
1586 else if (vendor_id == 0x055d) {
1587 /* I don't know the difference between the C10 and the C30;
1588 I suppose the difference is the sensor, but both cameras
1589 work equally well with a type_id of 675
1591 switch(product_id) {
1593 PWC_INFO("Samsung MPC-C10 USB webcam detected.\n");
1594 name = "Samsung MPC-C10";
1598 PWC_INFO("Samsung MPC-C30 USB webcam detected.\n");
1599 name = "Samsung MPC-C30";
1603 PWC_INFO("Samsung SNC-35E (v3.0) USB webcam detected.\n");
1604 name = "Samsung MPC-C30";
1612 else if (vendor_id == 0x041e) {
1613 switch(product_id) {
1615 PWC_INFO("Creative Labs Webcam 5 detected.\n");
1616 name = "Creative Labs Webcam 5";
1620 PWC_INFO("Creative Labs Webcam Pro Ex detected.\n");
1621 name = "Creative Labs Webcam Pro Ex";
1629 else if (vendor_id == 0x04cc) {
1630 switch(product_id) {
1632 PWC_INFO("Sotec Afina Eye USB webcam detected.\n");
1633 name = "Sotec Afina Eye";
1641 else if (vendor_id == 0x06be) {
1642 switch(product_id) {
1644 /* This is essentially the same cam as the Sotec Afina Eye */
1645 PWC_INFO("AME Co. Afina Eye USB webcam detected.\n");
1646 name = "AME Co. Afina Eye";
1655 else if (vendor_id == 0x0d81) {
1656 switch(product_id) {
1658 PWC_INFO("Visionite VCS-UC300 USB webcam detected.\n");
1659 name = "Visionite VCS-UC300";
1660 type_id = 740; /* CCD sensor */
1663 PWC_INFO("Visionite VCS-UM100 USB webcam detected.\n");
1664 name = "Visionite VCS-UM100";
1665 type_id = 730; /* CMOS sensor */
1673 return -ENODEV; /* Not any of the know types; but the list keeps growing. */
1675 memset(serial_number, 0, 30);
1676 usb_string(udev, udev->descriptor.iSerialNumber, serial_number, 29);
1677 PWC_DEBUG_PROBE("Device serial number is %s\n", serial_number);
1679 if (udev->descriptor.bNumConfigurations > 1)
1680 PWC_WARNING("Warning: more than 1 configuration available.\n");
1682 /* Allocate structure, initialize pointers, mutexes, etc. and link it to the usb_device */
1683 pdev = kzalloc(sizeof(struct pwc_device), GFP_KERNEL);
1685 PWC_ERROR("Oops, could not allocate memory for pwc_device.\n");
1688 pdev->type = type_id;
1689 pdev->vsize = default_size;
1690 pdev->vframes = default_fps;
1691 strcpy(pdev->serial, serial_number);
1692 pdev->features = features;
1693 if (vendor_id == 0x046D && product_id == 0x08B5)
1695 /* Logitech QuickCam Orbit
1696 The ranges have been determined experimentally; they may differ from cam to cam.
1697 Also, the exact ranges left-right and up-down are different for my cam
1699 pdev->angle_range.pan_min = -7000;
1700 pdev->angle_range.pan_max = 7000;
1701 pdev->angle_range.tilt_min = -3000;
1702 pdev->angle_range.tilt_max = 2500;
1705 mutex_init(&pdev->modlock);
1706 spin_lock_init(&pdev->ptrlock);
1709 init_waitqueue_head(&pdev->frameq);
1710 pdev->vcompression = pwc_preferred_compression;
1712 /* Allocate video_device structure */
1713 pdev->vdev = video_device_alloc();
1714 if (pdev->vdev == 0)
1716 PWC_ERROR("Err, cannot allocate video_device struture. Failing probe.");
1720 memcpy(pdev->vdev, &pwc_template, sizeof(pwc_template));
1721 pdev->vdev->dev = &(udev->dev);
1722 strcpy(pdev->vdev->name, name);
1723 pdev->vdev->owner = THIS_MODULE;
1724 video_set_drvdata(pdev->vdev, pdev);
1726 pdev->release = le16_to_cpu(udev->descriptor.bcdDevice);
1727 PWC_DEBUG_PROBE("Release: %04x\n", pdev->release);
1729 /* Now search device_hint[] table for a match, so we can hint a node number. */
1730 for (hint = 0; hint < MAX_DEV_HINTS; hint++) {
1731 if (((device_hint[hint].type == -1) || (device_hint[hint].type == pdev->type)) &&
1732 (device_hint[hint].pdev == NULL)) {
1733 /* so far, so good... try serial number */
1734 if ((device_hint[hint].serial_number[0] == '*') || !strcmp(device_hint[hint].serial_number, serial_number)) {
1736 video_nr = device_hint[hint].device_node;
1737 PWC_DEBUG_PROBE("Found hint, will try to register as /dev/video%d\n", video_nr);
1743 pdev->vdev->release = video_device_release;
1744 i = video_register_device(pdev->vdev, VFL_TYPE_GRABBER, video_nr);
1746 PWC_ERROR("Failed to register as video device (%d).\n", i);
1751 PWC_INFO("Registered as /dev/video%d.\n", pdev->vdev->minor & 0x3F);
1755 if (hint < MAX_DEV_HINTS)
1756 device_hint[hint].pdev = pdev;
1758 PWC_DEBUG_PROBE("probe() function returning struct at 0x%p.\n", pdev);
1759 usb_set_intfdata (intf, pdev);
1760 rc = pwc_create_sysfs_files(pdev->vdev);
1764 /* Set the leds off */
1765 pwc_set_leds(pdev, 0, 0);
1766 pwc_camera_power(pdev, 0);
1771 if (hint < MAX_DEV_HINTS)
1772 device_hint[hint].pdev = NULL;
1773 video_unregister_device(pdev->vdev);
1775 video_device_release(pdev->vdev); /* Drip... drip... drip... */
1776 kfree(pdev); /* Oops, no memory leaks please */
1780 /* The user janked out the cable... */
1781 static void usb_pwc_disconnect(struct usb_interface *intf)
1783 struct pwc_device *pdev;
1787 pdev = usb_get_intfdata (intf);
1788 usb_set_intfdata (intf, NULL);
1790 PWC_ERROR("pwc_disconnect() Called without private pointer.\n");
1791 goto disconnect_out;
1793 if (pdev->udev == NULL) {
1794 PWC_ERROR("pwc_disconnect() already called for %p\n", pdev);
1795 goto disconnect_out;
1797 if (pdev->udev != interface_to_usbdev(intf)) {
1798 PWC_ERROR("pwc_disconnect() Woops: pointer mismatch udev/pdev.\n");
1799 goto disconnect_out;
1802 /* We got unplugged; this is signalled by an EPIPE error code */
1804 PWC_INFO("Disconnected while webcam is in use!\n");
1805 pdev->error_status = EPIPE;
1808 /* Alert waiting processes */
1809 wake_up_interruptible(&pdev->frameq);
1810 /* Wait until device is closed */
1812 pdev->unplugged = 1;
1814 /* Device is closed, so we can safely unregister it */
1815 PWC_DEBUG_PROBE("Unregistering video device in disconnect().\n");
1817 /* Free memory (don't set pdev to 0 just yet) */
1821 /* search device_hint[] table if we occupy a slot, by any chance */
1822 for (hint = 0; hint < MAX_DEV_HINTS; hint++)
1823 if (device_hint[hint].pdev == pdev)
1824 device_hint[hint].pdev = NULL;
1831 /* *grunt* We have to do atoi ourselves :-( */
1832 static int pwc_atoi(const char *s)
1837 while (*s != '\0' && *s >= '0' && *s <= '9') {
1838 k = 10 * k + (*s - '0');
1846 * Initialization code & module stuff
1853 static int compression = -1;
1854 static int leds[2] = { -1, -1 };
1855 static int leds_nargs;
1856 static char *dev_hint[MAX_DEV_HINTS];
1857 static int dev_hint_nargs;
1859 module_param(size, charp, 0444);
1860 module_param(fps, int, 0444);
1861 module_param(fbufs, int, 0444);
1862 module_param(mbufs, int, 0444);
1863 #ifdef CONFIG_USB_PWC_DEBUG
1864 module_param_named(trace, pwc_trace, int, 0644);
1866 module_param(power_save, int, 0444);
1867 module_param(compression, int, 0444);
1868 module_param_array(leds, int, &leds_nargs, 0444);
1869 module_param_array(dev_hint, charp, &dev_hint_nargs, 0444);
1871 MODULE_PARM_DESC(size, "Initial image size. One of sqcif, qsif, qcif, sif, cif, vga");
1872 MODULE_PARM_DESC(fps, "Initial frames per second. Varies with model, useful range 5-30");
1873 MODULE_PARM_DESC(fbufs, "Number of internal frame buffers to reserve");
1874 MODULE_PARM_DESC(mbufs, "Number of external (mmap()ed) image buffers");
1875 MODULE_PARM_DESC(trace, "For debugging purposes");
1876 MODULE_PARM_DESC(power_save, "Turn power save feature in camera on or off");
1877 MODULE_PARM_DESC(compression, "Preferred compression quality. Range 0 (uncompressed) to 3 (high compression)");
1878 MODULE_PARM_DESC(leds, "LED on,off time in milliseconds");
1879 MODULE_PARM_DESC(dev_hint, "Device node hints");
1881 MODULE_DESCRIPTION("Philips & OEM USB webcam driver");
1882 MODULE_AUTHOR("Luc Saillard <luc@saillard.org>");
1883 MODULE_LICENSE("GPL");
1884 MODULE_ALIAS("pwcx");
1885 MODULE_VERSION( PWC_VERSION );
1887 static int __init usb_pwc_init(void)
1890 char *sizenames[PSZ_MAX] = { "sqcif", "qsif", "qcif", "sif", "cif", "vga" };
1892 PWC_INFO("Philips webcam module version " PWC_VERSION " loaded.\n");
1893 PWC_INFO("Supports Philips PCA645/646, PCVC675/680/690, PCVC720[40]/730/740/750 & PCVC830/840.\n");
1894 PWC_INFO("Also supports the Askey VC010, various Logitech Quickcams, Samsung MPC-C10 and MPC-C30,\n");
1895 PWC_INFO("the Creative WebCam 5 & Pro Ex, SOTEC Afina Eye and Visionite VCS-UC300 and VCS-UM100.\n");
1898 if (fps < 4 || fps > 30) {
1899 PWC_ERROR("Framerate out of bounds (4-30).\n");
1903 PWC_DEBUG_MODULE("Default framerate set to %d.\n", default_fps);
1907 /* string; try matching with array */
1908 for (sz = 0; sz < PSZ_MAX; sz++) {
1909 if (!strcmp(sizenames[sz], size)) { /* Found! */
1914 if (sz == PSZ_MAX) {
1915 PWC_ERROR("Size not recognized; try size=[sqcif | qsif | qcif | sif | cif | vga].\n");
1918 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);
1921 if (mbufs < 1 || mbufs > MAX_IMAGES) {
1922 PWC_ERROR("Illegal number of mmap() buffers; use a number between 1 and %d.\n", MAX_IMAGES);
1926 PWC_DEBUG_MODULE("Number of image buffers set to %d.\n", pwc_mbufs);
1929 if (fbufs < 2 || fbufs > MAX_FRAMES) {
1930 PWC_ERROR("Illegal number of frame buffers; use a number between 2 and %d.\n", MAX_FRAMES);
1933 default_fbufs = fbufs;
1934 PWC_DEBUG_MODULE("Number of frame buffers set to %d.\n", default_fbufs);
1936 #ifdef CONFIG_USB_PWC_DEBUG
1937 if (pwc_trace >= 0) {
1938 PWC_DEBUG_MODULE("Trace options: 0x%04x\n", pwc_trace);
1941 if (compression >= 0) {
1942 if (compression > 3) {
1943 PWC_ERROR("Invalid compression setting; use a number between 0 (uncompressed) and 3 (high).\n");
1946 pwc_preferred_compression = compression;
1947 PWC_DEBUG_MODULE("Preferred compression set to %d.\n", pwc_preferred_compression);
1950 PWC_DEBUG_MODULE("Enabling power save on open/close.\n");
1956 /* Big device node whoopla. Basically, it allows you to assign a
1957 device node (/dev/videoX) to a camera, based on its type
1958 & serial number. The format is [type[.serialnumber]:]node.
1960 Any camera that isn't matched by these rules gets the next
1961 available free device node.
1963 for (i = 0; i < MAX_DEV_HINTS; i++) {
1964 char *s, *colon, *dot;
1966 /* This loop also initializes the array */
1967 device_hint[i].pdev = NULL;
1969 if (s != NULL && *s != '\0') {
1970 device_hint[i].type = -1; /* wildcard */
1971 strcpy(device_hint[i].serial_number, "*");
1973 /* parse string: chop at ':' & '/' */
1975 while (*colon != '\0' && *colon != ':')
1977 while (*dot != '\0' && *dot != '.')
1979 /* Few sanity checks */
1980 if (*dot != '\0' && dot > colon) {
1981 PWC_ERROR("Malformed camera hint: the colon must be after the dot.\n");
1985 if (*colon == '\0') {
1988 PWC_ERROR("Malformed camera hint: no colon + device node given.\n");
1992 /* No type or serial number specified, just a number. */
1993 device_hint[i].device_node = pwc_atoi(s);
1997 /* There's a colon, so we have at least a type and a device node */
1998 device_hint[i].type = pwc_atoi(s);
1999 device_hint[i].device_node = pwc_atoi(colon + 1);
2001 /* There's a serial number as well */
2006 while (*dot != ':' && k < 29) {
2007 device_hint[i].serial_number[k++] = *dot;
2010 device_hint[i].serial_number[k] = '\0';
2013 PWC_TRACE("device_hint[%d]:\n", i);
2014 PWC_TRACE(" type : %d\n", device_hint[i].type);
2015 PWC_TRACE(" serial# : %s\n", device_hint[i].serial_number);
2016 PWC_TRACE(" node : %d\n", device_hint[i].device_node);
2019 device_hint[i].type = 0; /* not filled */
2020 } /* ..for MAX_DEV_HINTS */
2022 PWC_DEBUG_PROBE("Registering driver at address 0x%p.\n", &pwc_driver);
2023 return usb_register(&pwc_driver);
2026 static void __exit usb_pwc_exit(void)
2028 PWC_DEBUG_MODULE("Deregistering driver.\n");
2029 usb_deregister(&pwc_driver);
2030 PWC_INFO("Philips webcam module removed.\n");
2033 module_init(usb_pwc_init);
2034 module_exit(usb_pwc_exit);
2036 /* vim: set cino= formatoptions=croql cindent shiftwidth=8 tabstop=8: */