diff options
Diffstat (limited to 'drivers/media/video/pwc/pwc-if.c')
| -rw-r--r-- | drivers/media/video/pwc/pwc-if.c | 2115 |
1 files changed, 0 insertions, 2115 deletions
diff --git a/drivers/media/video/pwc/pwc-if.c b/drivers/media/video/pwc/pwc-if.c deleted file mode 100644 index e62beb4efdb..00000000000 --- a/drivers/media/video/pwc/pwc-if.c +++ /dev/null @@ -1,2115 +0,0 @@ -/* Linux driver for Philips webcam - USB and Video4Linux interface part. - (C) 1999-2004 Nemosoft Unv. - (C) 2004-2006 Luc Saillard (luc@saillard.org) - - 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>. - The decompression routines have been implemented by reverse-engineering the - Nemosoft binary pwcx module. Caveat emptor. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - -*/ - -/* - This code forms the interface between the USB layers and the Philips - specific stuff. Some adanved stuff of the driver falls under an - NDA, signed between me and Philips B.V., Eindhoven, the Netherlands, and - is thus not distributed in source form. The binary pwcx.o module - contains the code that falls under the NDA. - - In case you're wondering: 'pwc' stands for "Philips WebCam", but - I really didn't want to type 'philips_web_cam' every time (I'm lazy as - any Linux kernel hacker, but I don't like uncomprehensible abbreviations - without explanation). - - Oh yes, convention: to disctinguish between all the various pointers to - device-structures, I use these names for the pointer variables: - udev: struct usb_device * - vdev: struct video_device * - pdev: struct pwc_devive * -*/ - -/* Contributors: - - Alvarado: adding whitebalance code - - Alistar Moire: QuickCam 3000 Pro device/product ID - - Tony Hoyle: Creative Labs Webcam 5 device/product ID - - Mark Burazin: solving hang in VIDIOCSYNC when camera gets unplugged - - Jk Fang: Sotec Afina Eye ID - - Xavier Roche: QuickCam Pro 4000 ID - - Jens Knudsen: QuickCam Zoom ID - - J. Debert: QuickCam for Notebooks ID - - Pham Thanh Nam: webcam snapshot button as an event input device -*/ - -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/mm.h> -#include <linux/module.h> -#include <linux/poll.h> -#include <linux/slab.h> -#include <linux/smp_lock.h> -#ifdef CONFIG_USB_PWC_INPUT_EVDEV -#include <linux/usb/input.h> -#endif -#include <linux/vmalloc.h> -#include <asm/io.h> -#include <linux/kernel.h> /* simple_strtol() */ - -#include "pwc.h" -#include "pwc-kiara.h" -#include "pwc-timon.h" -#include "pwc-dec23.h" -#include "pwc-dec1.h" -#include "pwc-uncompress.h" - -/* Function prototypes and driver templates */ - -/* hotplug device table support */ -static const struct usb_device_id pwc_device_table [] = { - { USB_DEVICE(0x0471, 0x0302) }, /* Philips models */ - { USB_DEVICE(0x0471, 0x0303) }, - { USB_DEVICE(0x0471, 0x0304) }, - { USB_DEVICE(0x0471, 0x0307) }, - { USB_DEVICE(0x0471, 0x0308) }, - { USB_DEVICE(0x0471, 0x030C) }, - { USB_DEVICE(0x0471, 0x0310) }, - { USB_DEVICE(0x0471, 0x0311) }, /* Philips ToUcam PRO II */ - { USB_DEVICE(0x0471, 0x0312) }, - { USB_DEVICE(0x0471, 0x0313) }, /* the 'new' 720K */ - { USB_DEVICE(0x0471, 0x0329) }, /* Philips SPC 900NC PC Camera */ - { USB_DEVICE(0x069A, 0x0001) }, /* Askey */ - { USB_DEVICE(0x046D, 0x08B0) }, /* Logitech QuickCam Pro 3000 */ - { USB_DEVICE(0x046D, 0x08B1) }, /* Logitech QuickCam Notebook Pro */ - { USB_DEVICE(0x046D, 0x08B2) }, /* Logitech QuickCam Pro 4000 */ - { USB_DEVICE(0x046D, 0x08B3) }, /* Logitech QuickCam Zoom (old model) */ - { USB_DEVICE(0x046D, 0x08B4) }, /* Logitech QuickCam Zoom (new model) */ - { USB_DEVICE(0x046D, 0x08B5) }, /* Logitech QuickCam Orbit/Sphere */ - { USB_DEVICE(0x046D, 0x08B6) }, /* Cisco VT Camera */ - { USB_DEVICE(0x046D, 0x08B7) }, /* Logitech ViewPort AV 100 */ - { USB_DEVICE(0x046D, 0x08B8) }, /* Logitech (reserved) */ - { USB_DEVICE(0x055D, 0x9000) }, /* Samsung MPC-C10 */ - { USB_DEVICE(0x055D, 0x9001) }, /* Samsung MPC-C30 */ - { USB_DEVICE(0x055D, 0x9002) }, /* Samsung SNC-35E (Ver3.0) */ - { USB_DEVICE(0x041E, 0x400C) }, /* Creative Webcam 5 */ - { USB_DEVICE(0x041E, 0x4011) }, /* Creative Webcam Pro Ex */ - { USB_DEVICE(0x04CC, 0x8116) }, /* Afina Eye */ - { USB_DEVICE(0x06BE, 0x8116) }, /* new Afina Eye */ - { USB_DEVICE(0x0d81, 0x1910) }, /* Visionite */ - { USB_DEVICE(0x0d81, 0x1900) }, - { } -}; -MODULE_DEVICE_TABLE(usb, pwc_device_table); - -static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id *id); -static void usb_pwc_disconnect(struct usb_interface *intf); - -static struct usb_driver pwc_driver = { - .name = "Philips webcam", /* name */ - .id_table = pwc_device_table, - .probe = usb_pwc_probe, /* probe() */ - .disconnect = usb_pwc_disconnect, /* disconnect() */ -}; - -#define MAX_DEV_HINTS 20 -#define MAX_ISOC_ERRORS 20 - -static int default_size = PSZ_QCIF; -static int default_fps = 10; -static int default_fbufs = 3; /* Default number of frame buffers */ - int pwc_mbufs = 2; /* Default number of mmap() buffers */ -#ifdef CONFIG_USB_PWC_DEBUG - int pwc_trace = PWC_DEBUG_LEVEL; -#endif -static int power_save; -static int led_on = 100, led_off; /* defaults to LED that is on while in use */ -static int pwc_preferred_compression = 1; /* 0..3 = uncompressed..high */ -static struct { - int type; - char serial_number[30]; - int device_node; - struct pwc_device *pdev; -} device_hint[MAX_DEV_HINTS]; - -/***/ - -static int pwc_video_open(struct file *file); -static int pwc_video_close(struct file *file); -static ssize_t pwc_video_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos); -static unsigned int pwc_video_poll(struct file *file, poll_table *wait); -static long pwc_video_ioctl(struct file *file, - unsigned int ioctlnr, unsigned long arg); -static int pwc_video_mmap(struct file *file, struct vm_area_struct *vma); - -static const struct v4l2_file_operations pwc_fops = { - .owner = THIS_MODULE, - .open = pwc_video_open, - .release = pwc_video_close, - .read = pwc_video_read, - .poll = pwc_video_poll, - .mmap = pwc_video_mmap, - .unlocked_ioctl = pwc_video_ioctl, -}; -static struct video_device pwc_template = { - .name = "Philips Webcam", /* Filled in later */ - .release = video_device_release, - .fops = &pwc_fops, -}; - -/***************************************************************************/ - -/* Okay, this is some magic that I worked out and the reasoning behind it... - - The biggest problem with any USB device is of course: "what to do - when the user unplugs the device while it is in use by an application?" - We have several options: - 1) Curse them with the 7 plagues when they do (requires divine intervention) - 2) Tell them not to (won't work: they'll do it anyway) - 3) Oops the kernel (this will have a negative effect on a user's uptime) - 4) Do something sensible. - - Of course, we go for option 4. - - It happens that this device will be linked to two times, once from - usb_device and once from the video_device in their respective 'private' - pointers. This is done when the device is probed() and all initialization - succeeded. The pwc_device struct links back to both structures. - - When a device is unplugged while in use it will be removed from the - list of known USB devices; I also de-register it as a V4L device, but - unfortunately I can't free the memory since the struct is still in use - by the file descriptor. This free-ing is then deferend until the first - opportunity. Crude, but it works. - - A small 'advantage' is that if a user unplugs the cam and plugs it back - in, it should get assigned the same video device minor, but unfortunately - it's non-trivial to re-link the cam back to the video device... (that - would surely be magic! :)) -*/ - -/***************************************************************************/ -/* Private functions */ - -/* Here we want the physical address of the memory. - * This is used when initializing the contents of the area. - */ - - - -static void *pwc_rvmalloc(unsigned long size) -{ - void * mem; - unsigned long adr; - - mem=vmalloc_32(size); - if (!mem) - return NULL; - - memset(mem, 0, size); /* Clear the ram out, no junk to the user */ - adr=(unsigned long) mem; - while (size > 0) - { - SetPageReserved(vmalloc_to_page((void *)adr)); - adr += PAGE_SIZE; - size -= PAGE_SIZE; - } - return mem; -} - -static void pwc_rvfree(void * mem, unsigned long size) -{ - unsigned long adr; - - if (!mem) - return; - - adr=(unsigned long) mem; - while ((long) size > 0) - { - ClearPageReserved(vmalloc_to_page((void *)adr)); - adr += PAGE_SIZE; - size -= PAGE_SIZE; - } - vfree(mem); -} - - - - -static int pwc_allocate_buffers(struct pwc_device *pdev) -{ - int i, err; - void *kbuf; - - PWC_DEBUG_MEMORY(">> pwc_allocate_buffers(pdev = 0x%p)\n", pdev); - - if (pdev == NULL) - return -ENXIO; - - /* Allocate Isochronuous pipe buffers */ - for (i = 0; i < MAX_ISO_BUFS; i++) { - if (pdev->sbuf[i].data == NULL) { - kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL); - if (kbuf == NULL) { - PWC_ERROR("Failed to allocate iso buffer %d.\n", i); - return -ENOMEM; - } - PWC_DEBUG_MEMORY("Allocated iso buffer at %p.\n", kbuf); - pdev->sbuf[i].data = kbuf; - } - } - - /* Allocate frame buffer structure */ - if (pdev->fbuf == NULL) { - kbuf = kzalloc(default_fbufs * sizeof(struct pwc_frame_buf), GFP_KERNEL); - if (kbuf == NULL) { - PWC_ERROR("Failed to allocate frame buffer structure.\n"); - return -ENOMEM; - } - PWC_DEBUG_MEMORY("Allocated frame buffer structure at %p.\n", kbuf); - pdev->fbuf = kbuf; - } - - /* create frame buffers, and make circular ring */ - for (i = 0; i < default_fbufs; i++) { - if (pdev->fbuf[i].data == NULL) { - kbuf = vmalloc(PWC_FRAME_SIZE); /* need vmalloc since frame buffer > 128K */ - if (kbuf == NULL) { - PWC_ERROR("Failed to allocate frame buffer %d.\n", i); - return -ENOMEM; - } - PWC_DEBUG_MEMORY("Allocated frame buffer %d at %p.\n", i, kbuf); - pdev->fbuf[i].data = kbuf; - memset(kbuf, 0, PWC_FRAME_SIZE); - } - } - - /* Allocate decompressor table space */ - if (DEVICE_USE_CODEC1(pdev->type)) - err = pwc_dec1_alloc(pdev); - else - err = pwc_dec23_alloc(pdev); - - if (err) { - PWC_ERROR("Failed to allocate decompress table.\n"); - return err; - } - - /* Allocate image buffer; double buffer for mmap() */ - kbuf = pwc_rvmalloc(pwc_mbufs * pdev->len_per_image); - if (kbuf == NULL) { - PWC_ERROR("Failed to allocate image buffer(s). needed (%d)\n", - pwc_mbufs * pdev->len_per_image); - return -ENOMEM; - } - PWC_DEBUG_MEMORY("Allocated image buffer at %p.\n", kbuf); - pdev->image_data = kbuf; - 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; - - 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); - 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); - 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 void pwc_snapshot_button(struct pwc_device *pdev, int down) -{ - if (down) { - PWC_TRACE("Snapshot button pressed.\n"); - pdev->snapshot_button_status = 1; - } else { - PWC_TRACE("Snapshot button released.\n"); - } - -#ifdef CONFIG_USB_PWC_INPUT_EVDEV - if (pdev->button_dev) { - input_report_key(pdev->button_dev, KEY_CAMERA, down); - input_sync(pdev->button_dev); - } -#endif -} - -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) { - pwc_snapshot_button(pdev, ptr[0] & 0x01); - } - 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) { - pwc_snapshot_button(pdev, ptr[0] & 0x01); - } - 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 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); - pwc_construct(pdev); /* set min/max sizes correct */ - 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"); - - - /* 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); - -#ifdef CONFIG_USB_PWC_INPUT_EVDEV - if (pdev->button_dev) - input_unregister_device(pdev->button_dev); -#endif - - kfree(pdev); -} - -/* Note that all cleanup is done in the reverse order as in _open */ -static int pwc_video_close(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); - - pdev = video_get_drvdata(vdev); - mutex_lock(&pdev->modlock); - 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); - /* 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; - } - mutex_unlock(&pdev->modlock); - - 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->pixfmt != V4L2_PIX_FMT_YUV420) - 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 long pwc_video_ioctl(struct file *file, - unsigned int cmd, unsigned long arg) -{ - struct video_device *vdev = file->private_data; - struct pwc_device *pdev; - long 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 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."); - rc = -ENOMEM; - goto err_free_mem; - } - memcpy(pdev->vdev, &pwc_template, sizeof(pwc_template)); - pdev->vdev->parent = &intf->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; - - /* 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); - - /* Set the leds off */ - pwc_set_leds(pdev, 0, 0); - pwc_camera_power(pdev, 0); - - rc = video_register_device(pdev->vdev, VFL_TYPE_GRABBER, video_nr); - if (rc < 0) { - PWC_ERROR("Failed to register as video device (%d).\n", rc); - goto err_video_release; - } - rc = pwc_create_sysfs_files(pdev->vdev); - if (rc) - goto err_video_unreg; - - PWC_INFO("Registered as %s.\n", video_device_node_name(pdev->vdev)); - -#ifdef CONFIG_USB_PWC_INPUT_EVDEV - /* register webcam snapshot button input device */ - pdev->button_dev = input_allocate_device(); - if (!pdev->button_dev) { - PWC_ERROR("Err, insufficient memory for webcam snapshot button device."); - rc = -ENOMEM; - pwc_remove_sysfs_files(pdev->vdev); - goto err_video_unreg; - } - - usb_make_path(udev, pdev->button_phys, sizeof(pdev->button_phys)); - strlcat(pdev->button_phys, "/input0", sizeof(pdev->button_phys)); - - pdev->button_dev->name = "PWC snapshot button"; - pdev->button_dev->phys = pdev->button_phys; - usb_to_input_id(pdev->udev, &pdev->button_dev->id); - pdev->button_dev->dev.parent = &pdev->udev->dev; - pdev->button_dev->evbit[0] = BIT_MASK(EV_KEY); - pdev->button_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA); - - rc = input_register_device(pdev->button_dev); - if (rc) { - input_free_device(pdev->button_dev); - pdev->button_dev = NULL; - pwc_remove_sysfs_files(pdev->vdev); - goto err_video_unreg; - } -#endif - - return 0; - -err_video_unreg: - if (hint < MAX_DEV_HINTS) - device_hint[hint].pdev = NULL; - video_unregister_device(pdev->vdev); - pdev->vdev = NULL; /* So we don't try to release it below */ -err_video_release: - video_device_release(pdev->vdev); -err_free_mem: - kfree(pdev); - return rc; -} - -/* The user yanked out the cable... */ -static void usb_pwc_disconnect(struct usb_interface *intf) -{ - struct pwc_device *pdev; - int hint; - - pdev = usb_get_intfdata (intf); - mutex_lock(&pdev->modlock); - 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) { - pdev->unplugged = 1; - 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); - -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; - } - - mutex_unlock(&pdev->modlock); -} - - -/* - * 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"); -#ifdef CONFIG_USB_PWC_DEBUG -MODULE_PARM_DESC(trace, "For debugging purposes"); -#endif -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 = - simple_strtol(s, NULL, 10); - } - } - else { - /* There's a colon, so we have at least a type and a device node */ - device_hint[i].type = - simple_strtol(s, NULL, 10); - device_hint[i].device_node = - simple_strtol(colon + 1, NULL, 10); - 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: */ |