| /* Linux driver for Philips webcam |
| USB and Video4Linux interface part. |
| (C) 1999-2002 Nemosoft Unv. |
| |
| 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 |
| */ |
| |
| #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/vmalloc.h> |
| #include <linux/wrapper.h> |
| #include <asm/io.h> |
| |
| #include "pwc.h" |
| #include "pwc-ioctl.h" |
| #include "pwc-uncompress.h" |
| |
| /* Function prototypes and driver templates */ |
| |
| /* hotplug device table support */ |
| static 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) }, |
| { USB_DEVICE(0x0471, 0x0312) }, |
| { 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 */ |
| { USB_DEVICE(0x055D, 0x9000) }, /* Samsung */ |
| { USB_DEVICE(0x055D, 0x9001) }, |
| { USB_DEVICE(0x041E, 0x400C) }, /* Creative Webcam 5 */ |
| { USB_DEVICE(0x04CC, 0x8116) }, /* 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 10 |
| |
| static int default_size = PSZ_QCIF; |
| static int default_fps = 10; |
| static int default_palette = VIDEO_PALETTE_YUV420P; /* This format is understood by most tools */ |
| static int default_fbufs = 3; /* Default number of frame buffers */ |
| static int default_mbufs = 2; /* Default number of mmap() buffers */ |
| int pwc_trace = TRACE_MODULE | TRACE_FLOW | TRACE_PWCX; |
| static int power_save = 0; |
| static int led_on = 100, led_off = 0; /* defaults to LED that is on while in use */ |
| int pwc_preferred_compression = 2; /* 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 struct semaphore mem_lock; |
| static void *mem_leak = NULL; /* For delayed kfree()s. See below */ |
| |
| /***/ |
| |
| static int pwc_video_open(struct inode *inode, struct file *file); |
| static int pwc_video_close(struct inode *inode, struct file *file); |
| static int pwc_video_read(struct file *file, char *buf, |
| size_t count, loff_t *ppos); |
| static unsigned int pwc_video_poll(struct file *file, poll_table *wait); |
| static int pwc_video_ioctl(struct inode *inode, struct file *file, |
| unsigned int ioctlnr, unsigned long arg); |
| static int pwc_video_mmap(struct file *file, struct vm_area_struct *vma); |
| |
| static struct 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, |
| .ioctl = pwc_video_ioctl, |
| .llseek = no_llseek, |
| }; |
| static struct video_device pwc_template = { |
| .owner = THIS_MODULE, |
| .name = "Philips Webcam", /* Filled in later */ |
| .type = VID_TYPE_CAPTURE, |
| .hardware = VID_HARDWARE_PWC, |
| .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 inline unsigned long kvirt_to_pa(unsigned long adr) |
| { |
| unsigned long kva, ret; |
| |
| kva = (unsigned long) page_address(vmalloc_to_page((void *)adr)); |
| kva |= adr & (PAGE_SIZE-1); /* restore the offset */ |
| ret = __pa(kva); |
| return ret; |
| } |
| |
| static void * rvmalloc(unsigned long size) |
| { |
| void * mem; |
| unsigned long adr; |
| |
| size=PAGE_ALIGN(size); |
| mem=vmalloc_32(size); |
| if (mem) |
| { |
| memset(mem, 0, size); /* Clear the ram out, no junk to the user */ |
| adr=(unsigned long) mem; |
| while (size > 0) |
| { |
| mem_map_reserve(vmalloc_to_page((void *)adr)); |
| adr+=PAGE_SIZE; |
| size-=PAGE_SIZE; |
| } |
| } |
| return mem; |
| } |
| |
| static void rvfree(void * mem, unsigned long size) |
| { |
| unsigned long adr; |
| |
| if (mem) |
| { |
| adr=(unsigned long) mem; |
| while ((long) size > 0) |
| { |
| mem_map_unreserve(vmalloc_to_page((void *)adr)); |
| adr+=PAGE_SIZE; |
| size-=PAGE_SIZE; |
| } |
| vfree(mem); |
| } |
| } |
| |
| |
| |
| |
| static int pwc_allocate_buffers(struct pwc_device *pdev) |
| { |
| int i; |
| void *kbuf; |
| |
| Trace(TRACE_MEMORY, ">> pwc_allocate_buffers(pdev = 0x%p)\n", pdev); |
| |
| if (pdev == NULL) |
| return -ENXIO; |
| |
| #ifdef PWC_MAGIC |
| if (pdev->magic != PWC_MAGIC) { |
| Err("allocate_buffers(): magic failed.\n"); |
| return -ENXIO; |
| } |
| #endif |
| /* Allocate Isochronuous pipe buffers */ |
| for (i = 0; i < MAX_ISO_BUFS; i++) { |
| if (pdev->sbuf[i].data == NULL) { |
| kbuf = kmalloc(ISO_BUFFER_SIZE, GFP_KERNEL); |
| if (kbuf == NULL) { |
| Err("Failed to allocate iso buffer %d.\n", i); |
| return -ENOMEM; |
| } |
| Trace(TRACE_MEMORY, "Allocated iso buffer at %p.\n", kbuf); |
| pdev->sbuf[i].data = kbuf; |
| memset(kbuf, 0, ISO_BUFFER_SIZE); |
| } |
| } |
| |
| /* Allocate frame buffer structure */ |
| if (pdev->fbuf == NULL) { |
| kbuf = kmalloc(default_fbufs * sizeof(struct pwc_frame_buf), GFP_KERNEL); |
| if (kbuf == NULL) { |
| Err("Failed to allocate frame buffer structure.\n"); |
| return -ENOMEM; |
| } |
| Trace(TRACE_MEMORY, "Allocated frame buffer structure at %p.\n", kbuf); |
| pdev->fbuf = kbuf; |
| memset(kbuf, 0, default_fbufs * sizeof(struct pwc_frame_buf)); |
| } |
| /* 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) { |
| Err("Failed to allocate frame buffer %d.\n", i); |
| return -ENOMEM; |
| } |
| Trace(TRACE_MEMORY, "Allocated frame buffer %d at %p.\n", i, kbuf); |
| pdev->fbuf[i].data = kbuf; |
| memset(kbuf, 128, PWC_FRAME_SIZE); |
| } |
| } |
| |
| /* Allocate decompressor table space */ |
| kbuf = NULL; |
| if (pdev->decompressor != NULL) { |
| kbuf = kmalloc(pdev->decompressor->table_size, GFP_KERNEL); |
| if (kbuf == NULL) { |
| Err("Failed to allocate decompress table.\n"); |
| return -ENOMEM; |
| } |
| Trace(TRACE_MEMORY, "Allocated decompress table %p.\n", kbuf); |
| } |
| pdev->decompress_data = kbuf; |
| |
| /* Allocate image buffer; double buffer for mmap() */ |
| kbuf = rvmalloc(default_mbufs * pdev->len_per_image); |
| if (kbuf == NULL) { |
| Err("Failed to allocate image buffer(s).\n"); |
| return -ENOMEM; |
| } |
| Trace(TRACE_MEMORY, "Allocated image buffer at %p.\n", kbuf); |
| pdev->image_data = kbuf; |
| for (i = 0; i < default_mbufs; i++) |
| pdev->image_ptr[i] = kbuf + i * pdev->len_per_image; |
| for (; i < MAX_IMAGES; i++) |
| pdev->image_ptr[i] = NULL; |
| |
| kbuf = NULL; |
| |
| Trace(TRACE_MEMORY, "<< pwc_allocate_buffers()\n"); |
| return 0; |
| } |
| |
| static void pwc_free_buffers(struct pwc_device *pdev) |
| { |
| int i; |
| |
| Trace(TRACE_MEMORY, "Entering free_buffers(%p).\n", pdev); |
| |
| if (pdev == NULL) |
| return; |
| #ifdef PWC_MAGIC |
| if (pdev->magic != PWC_MAGIC) { |
| Err("free_buffers(): magic failed.\n"); |
| return; |
| } |
| #endif |
| |
| /* Release Iso-pipe buffers */ |
| for (i = 0; i < MAX_ISO_BUFS; i++) |
| if (pdev->sbuf[i].data != NULL) { |
| Trace(TRACE_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) { |
| Trace(TRACE_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) { |
| Trace(TRACE_MEMORY, "Freeing decompression buffer at %p.\n", pdev->decompress_data); |
| kfree(pdev->decompress_data); |
| pdev->decompress_data = NULL; |
| } |
| pdev->decompressor = NULL; |
| |
| /* Release image buffers */ |
| if (pdev->image_data != NULL) { |
| Trace(TRACE_MEMORY, "Freeing image buffer at %p.\n", pdev->image_data); |
| rvfree(pdev->image_data, default_mbufs * pdev->len_per_image); |
| } |
| pdev->image_data = NULL; |
| |
| Trace(TRACE_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 possibly 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 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 inline 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 */ |
| #if PWC_DEBUG |
| /* sanity check */ |
| if (pdev->full_frames == NULL) { |
| Err("Neither empty or full frames available!\n"); |
| spin_unlock_irqrestore(&pdev->ptrlock, flags); |
| return -EINVAL; |
| } |
| #endif |
| pdev->fill_frame = pdev->full_frames; |
| pdev->full_frames = pdev->full_frames->next; |
| ret = 1; |
| } |
| pdev->fill_frame->next = NULL; |
| #if PWC_DEBUG |
| Trace(TRACE_SEQUENCE, "Assigning sequence number %d.\n", pdev->sequence); |
| pdev->fill_frame->sequence = pdev->sequence++; |
| #endif |
| 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; |
| |
| 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); |
| } |
| |
| |
| /** |
| \brief Do all the handling for getting one frame: get pointer, decompress, advance pointers. |
| */ |
| static 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 */ |
| Err("Huh? Read frame still in use?\n"); |
| } |
| else { |
| if (pdev->full_frames == NULL) { |
| Err("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) { |
| #if PWC_DEBUG |
| Trace(TRACE_SEQUENCE, "Decompressing frame %d\n", pdev->read_frame->sequence); |
| #endif |
| /* Decompression is a lenghty 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) |
| */ |
| static inline void pwc_next_image(struct pwc_device *pdev) |
| { |
| pdev->image_used[pdev->fill_image] = 0; |
| pdev->fill_image = (pdev->fill_image + 1) % default_mbufs; |
| } |
| |
| /* 2002-10-11: YUV420P is the only palette remaining. */ |
| static int pwc_set_palette(struct pwc_device *pdev, int pal) |
| { |
| if ( pal == VIDEO_PALETTE_YUV420P |
| #if PWC_DEBUG |
| || pal == VIDEO_PALETTE_RAW |
| #endif |
| ) { |
| pdev->vpalette = pal; |
| pwc_set_image_buffer_size(pdev); |
| return 0; |
| } |
| Trace(TRACE_READ, "Palette %d not supported.\n", pal); |
| return -1; |
| } |
| |
| |
| |
| /* 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 pt_regs *regs) |
| { |
| struct pwc_device *pdev; |
| int i, fst, flen; |
| int awake; |
| struct pwc_frame_buf *fbuf; |
| unsigned char *fillptr, *iso_buf; |
| |
| pdev = (struct pwc_device *)urb->context; |
| if (pdev == NULL) { |
| Err("isoc_handler() called with NULL device?!\n"); |
| return; |
| } |
| #ifdef PWC_MAGIC |
| if (pdev->magic != PWC_MAGIC) { |
| Err("isoc_handler() called with bad magic!\n"); |
| return; |
| } |
| #endif |
| if (urb->status == -ENOENT || urb->status == -ECONNRESET) { |
| Trace(TRACE_OPEN, "pwc_isoc_handler(): URB (%p) unlinked %ssynchronuously.\n", urb, urb->status == -ENOENT ? "" : "a"); |
| return; |
| } |
| if (urb->status != -EINPROGRESS && urb->status != 0) { |
| 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"; break; |
| case -ETIMEDOUT: errmsg = "NAK (device does not respond)"; break; |
| } |
| Trace(TRACE_FLOW, "pwc_isoc_handler() called with status %d [%s].\n", urb->status, errmsg); |
| return; |
| } |
| |
| fbuf = pdev->fill_frame; |
| if (fbuf == NULL) { |
| Err("pwc_isoc_handler without valid fill frame.\n"); |
| wake_up_interruptible(&pdev->frameq); |
| return; |
| } |
| fillptr = fbuf->data + fbuf->filled; |
| awake = 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_size) { |
| Trace(TRACE_FLOW, "Frame buffer overflow (flen = %d, frame_size = %d).\n", flen, pdev->frame_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) { |
| /* 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) { |
| #if PWC_DEBUG |
| Debug("Hyundai CMOS sensor bug. Dropping frame %d.\n", fbuf->sequence); |
| #endif |
| pdev->drop_frames += 2; |
| pdev->vframes_error++; |
| } |
| if ((ptr[0] ^ pdev->vmirror) & 0x01) { |
| if (ptr[0] & 0x01) |
| Info("Snapshot button pressed.\n"); |
| else |
| Info("Snapshot button released.\n"); |
| } |
| if ((ptr[0] ^ pdev->vmirror) & 0x02) { |
| if (ptr[0] & 0x02) |
| Info("Image is mirrored.\n"); |
| else |
| Info("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++; |
| } |
| |
| /* 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_size) { |
| Trace(TRACE_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)) { |
| pdev->vframes_dumped++; |
| if ((pdev->vframe_count > FRAME_LOWMARK) && (pwc_trace & TRACE_FLOW)) { |
| if (pdev->vframes_dumped < 20) |
| Trace(TRACE_FLOW, "Dumping frame %d.\n", pdev->vframe_count); |
| if (pdev->vframes_dumped == 20) |
| Trace(TRACE_FLOW, "Dumping frame %d (last message).\n", pdev->vframe_count); |
| } |
| } |
| fbuf = pdev->fill_frame; |
| } |
| } /* !drop_frames */ |
| pdev->vframe_count++; |
| } |
| fbuf->filled = 0; |
| fillptr = fbuf->data; |
| pdev->vsync = 1; |
| } /* .. flen < last_packet_size */ |
| pdev->vlast_packet_size = flen; |
| } /* ..status == 0 */ |
| #if PWC_DEBUG |
| /* This is normally not interesting to the user, unless you are really debugging something */ |
| else { |
| static int iso_error = 0; |
| iso_error++; |
| if (iso_error < 20) |
| Trace(TRACE_FLOW, "Iso frame %d of USB has error %d\n", i, fst); |
| } |
| #endif |
| } |
| if (awake) |
| wake_up_interruptible(&pdev->frameq); |
| |
| urb->dev = pdev->udev; |
| i = usb_submit_urb(urb, GFP_ATOMIC); |
| if (i != 0) |
| Err("Error (%d) re-submitting urb in pwc_isoc_handler.\n", i); |
| } |
| |
| |
| static int pwc_isoc_init(struct pwc_device *pdev) |
| { |
| struct usb_device *udev; |
| struct urb *urb; |
| int i, j, ret; |
| |
| struct usb_host_interface *idesc; |
| |
| 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; |
| idesc = &udev->actconfig->interface[0].altsetting[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 = idesc->endpoint[i].desc.wMaxPacketSize; |
| break; |
| } |
| |
| if (pdev->vmax_packet_size < 0 || pdev->vmax_packet_size > ISO_MAX_FRAME_SIZE) { |
| Err("Failed to find packet size for video endpoint in current alternate setting.\n"); |
| return -ENFILE; /* Odd error, that should be noticable */ |
| } |
| |
| /* Set alternate interface */ |
| ret = 0; |
| Trace(TRACE_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) { |
| Err("Failed to allocate urb %d\n", i); |
| ret = -ENOMEM; |
| break; |
| } |
| pdev->sbuf[i].urb = urb; |
| Trace(TRACE_MEMORY, "Allocated URB at 0x%p\n", urb); |
| } |
| if (ret) { |
| /* De-allocate in reverse order */ |
| while (i >= 0) { |
| if (pdev->sbuf[i].urb != NULL) |
| usb_free_urb(pdev->sbuf[i].urb); |
| pdev->sbuf[i].urb = NULL; |
| i--; |
| } |
| 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) |
| Err("isoc_init() submit_urb %d failed with error %d\n", i, ret); |
| else |
| Trace(TRACE_OPEN, "URB 0x%p submitted.\n", pdev->sbuf[i].urb); |
| } |
| |
| /* All is done... */ |
| pdev->iso_init = 1; |
| Trace(TRACE_OPEN, "<< pwc_isoc_init()\n"); |
| return 0; |
| } |
| |
| static void pwc_isoc_cleanup(struct pwc_device *pdev) |
| { |
| int i; |
| |
| Trace(TRACE_OPEN, ">> pwc_isoc_cleanup()\n"); |
| if (pdev == NULL) |
| return; |
| |
| /* Unlinking ISOC buffers one by one */ |
| for (i = 0; i < MAX_ISO_BUFS; i++) { |
| struct urb *urb; |
| |
| urb = pdev->sbuf[i].urb; |
| if (urb != 0) { |
| if (pdev->iso_init) { |
| Trace(TRACE_MEMORY, "Unlinking URB %p\n", urb); |
| usb_unlink_urb(urb); |
| } |
| Trace(TRACE_MEMORY, "Freeing URB\n"); |
| usb_free_urb(urb); |
| pdev->sbuf[i].urb = NULL; |
| } |
| } |
| |
| /* Stop camera, but only if we are sure the camera is still there */ |
| if (!pdev->unplugged) { |
| Trace(TRACE_OPEN, "Setting alternate interface 0.\n"); |
| usb_set_interface(pdev->udev, 0, 0); |
| } |
| |
| pdev->iso_init = 0; |
| Trace(TRACE_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; |
| |
| /* Stop isoc stuff */ |
| pwc_isoc_cleanup(pdev); |
| /* Reset parameters */ |
| pwc_reset_buffers(pdev); |
| /* Try to set video mode... */ |
| ret = pwc_set_video_mode(pdev, width, height, new_fps, new_compression, new_snapshot); |
| if (ret) /* That failed... restore old mode (we know that worked) */ |
| ret = pwc_set_video_mode(pdev, pdev->view.x, pdev->view.y, pdev->vframes, pdev->vcompression, pdev->vsnapshot); |
| if (!ret) |
| if (pwc_isoc_init(pdev) < 0) |
| Info("Failed to restart ISOC transfer in pwc_try_video_mode.\n"); |
| pdev->drop_frames++; /* try to avoid garbage during switch */ |
| return ret; |
| } |
| |
| |
| static inline void set_mem_leak(void *ptr) |
| { |
| down(&mem_lock); |
| if (mem_leak != NULL) |
| Err("Memleak: overwriting mem_leak pointer!\n"); |
| Trace(TRACE_MEMORY, "Setting mem_leak to 0x%p.\n", ptr); |
| mem_leak = ptr; |
| up(&mem_lock); |
| } |
| |
| static inline void free_mem_leak(void) |
| { |
| down(&mem_lock); |
| if (mem_leak != NULL) { |
| Trace(TRACE_MEMORY, "Freeing mem_leak ptr 0x%p.\n", mem_leak); |
| kfree(mem_leak); |
| mem_leak = NULL; |
| } |
| up(&mem_lock); |
| } |
| |
| |
| /***************************************************************************/ |
| /* Video4Linux functions */ |
| |
| static int pwc_video_open(struct inode *inode, struct file *file) |
| { |
| int i; |
| struct video_device *vdev = video_devdata(file); |
| struct pwc_device *pdev; |
| |
| Trace(TRACE_OPEN, ">> video_open called(vdev = 0x%p).\n", vdev); |
| |
| pdev = (struct pwc_device *)vdev->priv; |
| if (pdev == NULL) |
| BUG(); |
| if (pdev->vopen) |
| return -EBUSY; |
| |
| down(&pdev->modlock); |
| if (!pdev->usb_init) { |
| Trace(TRACE_OPEN, "Doing first time initialization.\n"); |
| pdev->usb_init = 1; |
| |
| if (pwc_trace & TRACE_OPEN) { |
| /* Query CMOS sensor type */ |
| const char *sensor_type = NULL; |
| |
| i = pwc_get_cmos_sensor(pdev); |
| switch(i) { |
| case -1: /* Unknown, show nothing */; break; |
| case 0x00: sensor_type = "Hyundai CMOS sensor"; break; |
| case 0x20: sensor_type = "Sony CCD sensor + TDA8787"; break; |
| case 0x2E: sensor_type = "Sony CCD sensor + Exas 98L59"; break; |
| case 0x2F: sensor_type = "Sony CCD sensor + ADI 9804"; break; |
| case 0x30: sensor_type = "Sharp CCD sensor + TDA8787"; break; |
| case 0x3E: sensor_type = "Sharp CCD sensor + Exas 98L59"; break; |
| case 0x3F: sensor_type = "Sharp CCD sensor + ADI 9804"; break; |
| case 0x40: sensor_type = "UPA 1021 sensor"; break; |
| case 0x100: sensor_type = "VGA sensor"; break; |
| case 0x101: sensor_type = "PAL MR sensor"; break; |
| default: sensor_type = "unknown type of sensor"; break; |
| } |
| if (sensor_type != NULL) |
| Info("This %s camera is equipped with a %s (%d).\n", pdev->vdev->name, sensor_type, i); |
| } |
| } |
| |
| /* Turn on camera */ |
| if (power_save) { |
| i = pwc_camera_power(pdev, 1); |
| if (i < 0) |
| Info("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) |
| Info("Failed to set LED on/off time.\n"); |
| |
| /* Find our decompressor, if any */ |
| pdev->decompressor = pwc_find_decompressor(pdev->type); |
| #if PWC_DEBUG |
| Debug("Found decompressor for %d at 0x%p\n", pdev->type, pdev->decompressor); |
| #endif |
| |
| /* So far, so good. Allocate memory. */ |
| i = pwc_allocate_buffers(pdev); |
| if (i < 0) { |
| Trace(TRACE_OPEN, "Failed to allocate buffer memory.\n"); |
| up(&pdev->modlock); |
| return i; |
| } |
| |
| /* Reset buffers & parameters */ |
| pwc_reset_buffers(pdev); |
| for (i = 0; i < default_mbufs; i++) |
| pdev->image_used[i] = 0; |
| pdev->vframe_count = 0; |
| pdev->vframes_dumped = 0; |
| pdev->vframes_error = 0; |
| pdev->vpalette = default_palette; |
| #if PWC_DEBUG |
| pdev->sequence = 0; |
| #endif |
| |
| /* Set some defaults */ |
| pdev->vsnapshot = 0; |
| if (pdev->type == 730 || pdev->type == 740 || pdev->type == 750) |
| pdev->vsize = PSZ_QSIF; |
| else |
| pdev->vsize = PSZ_QCIF; |
| pdev->vframes = 10; |
| |
| /* Start iso pipe for video; first try user-supplied size/fps, if |
| that fails try QCIF/10 or QSIF/10 (a reasonable default), |
| then give up |
| */ |
| i = pwc_set_video_mode(pdev, pwc_image_sizes[default_size].x, pwc_image_sizes[default_size].y, default_fps, pdev->vcompression, 0); |
| if (i) { |
| Trace(TRACE_OPEN, "First attempt at set_video_mode failed.\n"); |
| if (pdev->type == 730 || pdev->type == 740 || pdev->type == 750) |
| i = pwc_set_video_mode(pdev, pwc_image_sizes[PSZ_QSIF].x, pwc_image_sizes[PSZ_QSIF].y, 10, pdev->vcompression, 0); |
| else |
| i = pwc_set_video_mode(pdev, pwc_image_sizes[PSZ_QCIF].x, pwc_image_sizes[PSZ_QCIF].y, 10, pdev->vcompression, 0); |
| } |
| if (i) { |
| Trace(TRACE_OPEN, "Second attempt at set_video_mode failed.\n"); |
| up(&pdev->modlock); |
| return i; |
| } |
| |
| i = pwc_isoc_init(pdev); |
| if (i) { |
| Trace(TRACE_OPEN, "Failed to init ISOC stuff = %d.\n", i); |
| up(&pdev->modlock); |
| return i; |
| } |
| |
| pdev->vopen++; |
| file->private_data = vdev; |
| /* lock decompressor; this has a small race condition, since we |
| could in theory unload pwcx.o between pwc_find_decompressor() |
| above and this call. I doubt it's ever going to be a problem. |
| */ |
| if (pdev->decompressor != NULL) |
| pdev->decompressor->lock(); |
| up(&pdev->modlock); |
| Trace(TRACE_OPEN, "<< video_open() returns 0.\n"); |
| return 0; |
| } |
| |
| /* Note that all cleanup is done in the reverse order as in _open */ |
| static int pwc_video_close(struct inode *inode, struct file *file) |
| { |
| struct video_device *vdev = file->private_data; |
| struct pwc_device *pdev; |
| int i; |
| |
| Trace(TRACE_OPEN, ">> video_close called(vdev = 0x%p).\n", vdev); |
| |
| pdev = (struct pwc_device *)vdev->priv; |
| if (pdev->vopen == 0) |
| Info("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) |
| Info("Closing video device: %d frames received, dumped %d frames, %d frames with errors.\n", pdev->vframe_count, pdev->vframes_dumped, pdev->vframes_error); |
| |
| /* Free isoc URBs, stop camera */ |
| pwc_isoc_cleanup(pdev); |
| |
| if (!pdev->unplugged) { |
| /* Turn LEDs off */ |
| if (pwc_set_leds(pdev, 0, 0) < 0) |
| Info("Failed to set LED on/off time.\n"); |
| /* Power down camera to save energy */ |
| if (power_save) { |
| i = pwc_camera_power(pdev, 0); |
| if (i < 0) |
| Err("Failed to power down camera (%d)\n", i); |
| } |
| } |
| |
| pdev->vopen = 0; |
| if (pdev->decompressor != NULL) { |
| pdev->decompressor->exit(); |
| pdev->decompressor->unlock(); |
| } |
| pwc_free_buffers(pdev); |
| |
| /* wake up _disconnect() routine */ |
| if (pdev->unplugged) |
| wake_up(&pdev->remove_ok); |
| file->private_data = NULL; |
| Trace(TRACE_OPEN, "<< video_close()\n"); |
| 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 int pwc_video_read(struct file *file, char *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); |
| |
| Trace(TRACE_READ, "video_read(0x%p, %p, %d) called.\n", vdev, buf, count); |
| if (vdev == NULL) |
| return -EFAULT; |
| pdev = vdev->priv; |
| if (pdev == NULL) |
| return -EFAULT; |
| if (pdev->unplugged) { |
| Info("pwc_video_read: Device got unplugged (1).\n"); |
| return -EPIPE; /* unplugged device! */ |
| } |
| |
| /* 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) { |
| if (noblock) { |
| remove_wait_queue(&pdev->frameq, &wait); |
| set_current_state(TASK_RUNNING); |
| return -EWOULDBLOCK; |
| } |
| if (signal_pending(current)) { |
| remove_wait_queue(&pdev->frameq, &wait); |
| set_current_state(TASK_RUNNING); |
| return -ERESTARTSYS; |
| } |
| schedule(); |
| set_current_state(TASK_INTERRUPTIBLE); |
| } |
| remove_wait_queue(&pdev->frameq, &wait); |
| set_current_state(TASK_RUNNING); |
| |
| /* Decompress [, convert] and release frame */ |
| if (pwc_handle_frame(pdev)) |
| return -EFAULT; |
| } |
| |
| Trace(TRACE_READ, "Copying data to user space.\n"); |
| /* copy bytes to user space; we allow for partial reads */ |
| if (count + pdev->image_read_pos > pdev->view.size) |
| count = pdev->view.size - pdev->image_read_pos; |
| if (copy_to_user(buf, pdev->image_ptr[pdev->fill_image] + pdev->image_read_pos, count)) |
| return -EFAULT; |
| pdev->image_read_pos += count; |
| if (pdev->image_read_pos >= pdev->view.size) { /* All data has been read */ |
| pdev->image_read_pos = 0; |
| pwc_next_image(pdev); |
| } |
| return count; |
| } |
| |
| 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 = vdev->priv; |
| if (pdev == NULL) |
| return -EFAULT; |
| |
| poll_wait(file, &pdev->frameq, wait); |
| if (pdev->unplugged) { |
| Info("pwc_video_poll: Device got unplugged.\n"); |
| return POLLERR; |
| } |
| if (pdev->full_frames != NULL) /* we have frames waiting */ |
| return (POLLIN | POLLRDNORM); |
| |
| return 0; |
| } |
| |
| static int pwc_video_do_ioctl(struct inode *inode, struct file *file, |
| unsigned int cmd, void *arg) |
| { |
| struct video_device *vdev = file->private_data; |
| struct pwc_device *pdev; |
| DECLARE_WAITQUEUE(wait, current); |
| |
| if (vdev == NULL) |
| return -EFAULT; |
| pdev = vdev->priv; |
| if (pdev == NULL) |
| return -EFAULT; |
| |
| switch (cmd) { |
| /* Query cabapilities */ |
| case VIDIOCGCAP: |
| { |
| struct video_capability *caps = arg; |
| |
| strcpy(caps->name, vdev->name); |
| caps->type = VID_TYPE_CAPTURE; |
| caps->channels = 1; |
| caps->audios = 1; |
| caps->minwidth = pdev->view_min.x; |
| caps->minheight = pdev->view_min.y; |
| caps->maxwidth = pdev->view_max.x; |
| caps->maxheight = pdev->view_max.y; |
| break; |
| } |
| |
| /* Channel functions (simulate 1 channel) */ |
| case VIDIOCGCHAN: |
| { |
| struct video_channel *v = arg; |
| |
| if (v->channel != 0) |
| return -EINVAL; |
| v->flags = 0; |
| v->tuners = 0; |
| v->type = VIDEO_TYPE_CAMERA; |
| strcpy(v->name, "Webcam"); |
| return 0; |
| } |
| |
| case VIDIOCSCHAN: |
| { |
| /* The spec says the argument is an integer, but |
| the bttv driver uses a video_channel arg, which |
| makes sense becasue it also has the norm flag. |
| */ |
| struct video_channel *v = arg; |
| if (v->channel != 0) |
| return -EINVAL; |
| return 0; |
| } |
| |
| |
| /* Picture functions; contrast etc. */ |
| case VIDIOCGPICT: |
| { |
| struct video_picture *p = arg; |
| int val; |
| |
| p->colour = 0x8000; |
| p->hue = 0x8000; |
| val = pwc_get_brightness(pdev); |
| if (val >= 0) |
| p->brightness = val; |
| else |
| p->brightness = 0xffff; |
| val = pwc_get_contrast(pdev); |
| if (val >= 0) |
| p->contrast = val; |
| else |
| p->contrast = 0xffff; |
| /* Gamma, Whiteness, what's the difference? :) */ |
| val = pwc_get_gamma(pdev); |
| if (val >= 0) |
| p->whiteness = val; |
| else |
| p->whiteness = 0xffff; |
| val = pwc_get_saturation(pdev); |
| if (val >= 0) |
| p->colour = val; |
| else |
| p->colour = 0xffff; |
| p->depth = 24; |
| p->palette = pdev->vpalette; |
| p->hue = 0xFFFF; /* N/A */ |
| break; |
| } |
| |
| case VIDIOCSPICT: |
| { |
| struct video_picture *p = arg; |
| /* |
| * FIXME: Suppose we are mid read |
| ANSWER: No problem: the firmware of the camera |
| can handle brightness/contrast/etc |
| changes at _any_ time, and the palette |
| is used exactly once in the uncompress |
| routine. |
| */ |
| if (p->palette && p->palette != pdev->vpalette) { |
| if (pwc_set_palette(pdev, p->palette) < 0) |
| return -EINVAL; |
| } |
| pwc_set_brightness(pdev, p->brightness); |
| pwc_set_contrast(pdev, p->contrast); |
| pwc_set_gamma(pdev, p->whiteness); |
| pwc_set_saturation(pdev, p->colour); |
| break; |
| } |
| |
| /* Window/size parameters */ |
| case VIDIOCGWIN: |
| { |
| struct video_window *vw = arg; |
| |
| vw->x = 0; |
| vw->y = 0; |
| vw->width = pdev->view.x; |
| vw->height = pdev->view.y; |
| vw->chromakey = 0; |
| vw->flags = (pdev->vframes << PWC_FPS_SHIFT) | |
| (pdev->vsnapshot ? PWC_FPS_SNAPSHOT : 0); |
| break; |
| } |
| |
| case VIDIOCSWIN: |
| { |
| struct video_window *vw = arg; |
| int fps, snapshot, ret; |
| |
| fps = (vw->flags & PWC_FPS_FRMASK) >> PWC_FPS_SHIFT; |
| snapshot = vw->flags & PWC_FPS_SNAPSHOT; |
| if (fps == 0) |
| fps = pdev->vframes; |
| if (pdev->view.x == vw->width && pdev->view.y && fps == pdev->vframes && snapshot == pdev->vsnapshot) |
| return 0; |
| ret = pwc_try_video_mode(pdev, vw->width, vw->height, fps, pdev->vcompression, snapshot); |
| if (ret) |
| return ret; |
| break; |
| } |
| |
| /* We don't have overlay support (yet) */ |
| case VIDIOCGFBUF: |
| { |
| struct video_buffer *vb = arg; |
| |
| memset(vb,0,sizeof(*vb)); |
| break; |
| } |
| |
| /* mmap() functions */ |
| case VIDIOCGMBUF: |
| { |
| /* Tell the user program how much memory is needed for a mmap() */ |
| struct video_mbuf *vm = arg; |
| int i; |
| |
| memset(vm, 0, sizeof(*vm)); |
| vm->size = default_mbufs * pdev->len_per_image; |
| vm->frames = default_mbufs; /* double buffering should be enough for most applications */ |
| for (i = 0; i < default_mbufs; i++) |
| vm->offsets[i] = i * pdev->len_per_image; |
| break; |
| } |
| |
| case VIDIOCMCAPTURE: |
| { |
| /* Start capture into a given image buffer (called 'frame' in video_mmap structure) */ |
| struct video_mmap *vm = arg; |
| |
| Trace(TRACE_READ, "VIDIOCMCAPTURE: %dx%d, frame %d, format %d\n", vm->width, vm->height, vm->frame, vm->format); |
| if (vm->frame < 0 || vm->frame >= default_mbufs) |
| return -EINVAL; |
| |
| /* xawtv is nasty. It probes the available palettes |
| by setting a very small image size and trying |
| various palettes... The driver doesn't support |
| such small images, so I'm working around it. |
| */ |
| if (vm->format && vm->format != pdev->vpalette) |
| if (pwc_set_palette(pdev, vm->format) < 0) |
| return -EINVAL; |
| |
| if ((vm->width != pdev->view.x || vm->height != pdev->view.y) && |
| (vm->width >= pdev->view_min.x && vm->height >= pdev->view_min.y)) { |
| int ret; |
| |
| Trace(TRACE_OPEN, "VIDIOCMCAPTURE: changing size to please xawtv :-(.\n"); |
| ret = pwc_try_video_mode(pdev, vm->width, vm->height, pdev->vframes, pdev->vcompression, pdev->vsnapshot); |
| if (ret) |
| return ret; |
| } /* ... size mismatch */ |
| |
| /* FIXME: should we lock here? */ |
| if (pdev->image_used[vm->frame]) |
| return -EBUSY; /* buffer wasn't available. Bummer */ |
| pdev->image_used[vm->frame] = 1; |
| |
| /* Okay, we're done here. In the SYNC call we wait until a |
| frame comes available, then expand image into the given |
| buffer. |
| In contrast to the CPiA cam the Philips cams deliver a |
| constant stream, almost like a grabber card. Also, |
| we have separate buffers for the rawdata and the image, |
| meaning we can nearly always expand into the requested buffer. |
| */ |
| Trace(TRACE_READ, "VIDIOCMCAPTURE done.\n"); |
| break; |
| } |
| |
| case VIDIOCSYNC: |
| { |
| /* The doc says: "Whenever a buffer is used it should |
| call VIDIOCSYNC to free this frame up and continue." |
| |
| The only odd thing about this whole procedure is |
| that MCAPTURE flags the buffer as "in use", and |
| SYNC immediately unmarks it, while it isn't |
| after SYNC that you know that the buffer actually |
| got filled! So you better not start a CAPTURE in |
| the same frame immediately (use double buffering). |
| This is not a problem for this cam, since it has |
| extra intermediate buffers, but a hardware |
| grabber card will then overwrite the buffer |
| you're working on. |
| */ |
| int *mbuf = arg; |
| int ret; |
| |
| Trace(TRACE_READ, "VIDIOCSYNC called (%d).\n", *mbuf); |
| |
| /* bounds check */ |
| if (*mbuf < 0 || *mbuf >= default_mbufs) |
| return -EINVAL; |
| /* check if this buffer was requested anyway */ |
| if (pdev->image_used[*mbuf] == 0) |
| return -EINVAL; |
| |
| /* Add ourselves to the frame wait-queue. |
| |
| FIXME: needs auditing for safety. |
| QUSTION: In what respect? I think that using the |
| frameq is safe now. |
| */ |
| add_wait_queue(&pdev->frameq, &wait); |
| while (pdev->full_frames == NULL) { |
| if (pdev->unplugged) { |
| remove_wait_queue(&pdev->frameq, &wait); |
| set_current_state(TASK_RUNNING); |
| return -ENODEV; |
| } |
| |
| if (signal_pending(current)) { |
| remove_wait_queue(&pdev->frameq, &wait); |
| set_current_state(TASK_RUNNING); |
| return -ERESTARTSYS; |
| } |
| set_current_state(TASK_INTERRUPTIBLE); |
| schedule(); |
| } |
| remove_wait_queue(&pdev->frameq, &wait); |
| set_current_state(TASK_RUNNING); |
| |
| /* The frame is ready. Expand in the image buffer |
| requested by the user. I don't care if you |
| mmap() 5 buffers and request data in this order: |
| buffer 4 2 3 0 1 2 3 0 4 3 1 . . . |
| Grabber hardware may not be so forgiving. |
| */ |
| Trace(TRACE_READ, "VIDIOCSYNC: frame ready.\n"); |
| pdev->fill_image = *mbuf; /* tell in which buffer we want the image to be expanded */ |
| /* Decompress, etc */ |
| ret = pwc_handle_frame(pdev); |
| pdev->image_used[*mbuf] = 0; |
| if (ret) |
| return -EFAULT; |
| break; |
| } |
| |
| case VIDIOCGAUDIO: |
| { |
| struct video_audio *v = arg; |
| |
| strcpy(v->name, "Microphone"); |
| v->audio = -1; /* unknown audio minor */ |
| v->flags = 0; |
| v->mode = VIDEO_SOUND_MONO; |
| v->volume = 0; |
| v->bass = 0; |
| v->treble = 0; |
| v->balance = 0x8000; |
| v->step = 1; |
| break; |
| } |
| |
| case VIDIOCSAUDIO: |
| { |
| /* Dummy: nothing can be set */ |
| break; |
| } |
| |
| case VIDIOCGUNIT: |
| { |
| struct video_unit *vu = arg; |
| |
| vu->video = pdev->vdev->minor & 0x3F; |
| vu->audio = -1; /* not known yet */ |
| vu->vbi = -1; |
| vu->radio = -1; |
| vu->teletext = -1; |
| break; |
| } |
| default: |
| return pwc_ioctl(pdev, cmd, arg); |
| } /* ..switch */ |
| return 0; |
| } |
| |
| static int pwc_video_ioctl(struct inode *inode, struct file *file, |
| unsigned int cmd, unsigned long arg) |
| { |
| return video_usercopy(inode, file, cmd, arg, pwc_video_do_ioctl); |
| } |
| |
| |
| 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 = vma->vm_start; |
| unsigned long size = vma->vm_end-vma->vm_start; |
| unsigned long page, pos; |
| |
| Trace(TRACE_MEMORY, "mmap(0x%p, 0x%lx, %lu) called.\n", vdev, start, size); |
| pdev = vdev->priv; |
| |
| pos = (unsigned long)pdev->image_data; |
| while (size > 0) { |
| page = kvirt_to_pa(pos); |
| if (remap_page_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; |
| struct video_device *vdev; |
| int vendor_id, product_id, type_id; |
| int i, hint; |
| int video_nr = -1; /* default: use next available device */ |
| char serial_number[30], *name; |
| |
| free_mem_leak(); |
| |
| /* Check if we can handle this device */ |
| Trace(TRACE_PROBE, "probe() called [%04X %04X], if %d\n", |
| udev->descriptor.idVendor, udev->descriptor.idProduct, |
| 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; |
| |
| vendor_id = udev->descriptor.idVendor; |
| product_id = udev->descriptor.idProduct; |
| |
| if (vendor_id == 0x0471) { |
| switch (product_id) { |
| case 0x0302: |
| Info("Philips PCA645VC USB webcam detected.\n"); |
| name = "Philips 645 webcam"; |
| type_id = 645; |
| break; |
| case 0x0303: |
| Info("Philips PCA646VC USB webcam detected.\n"); |
| name = "Philips 646 webcam"; |
| type_id = 646; |
| break; |
| case 0x0304: |
| Info("Askey VC010 type 2 USB webcam detected.\n"); |
| name = "Askey VC010 webcam"; |
| type_id = 646; |
| break; |
| case 0x0307: |
| Info("Philips PCVC675K (Vesta) USB webcam detected.\n"); |
| name = "Philips 675 webcam"; |
| type_id = 675; |
| break; |
| case 0x0308: |
| Info("Philips PCVC680K (Vesta Pro) USB webcam detected.\n"); |
| name = "Philips 680 webcam"; |
| type_id = 680; |
| break; |
| case 0x030C: |
| Info("Philips PCVC690K (Vesta Pro Scan) USB webcam detected.\n"); |
| name = "Philips 690 webcam"; |
| type_id = 690; |
| break; |
| case 0x0310: |
| Info("Philips PCVC730K (ToUCam Fun) USB webcam detected.\n"); |
| name = "Philips 730 webcam"; |
| type_id = 730; |
| break; |
| case 0x0311: |
| Info("Philips PCVC740K (ToUCam Pro) USB webcam detected.\n"); |
| name = "Philips 740 webcam"; |
| type_id = 740; |
| break; |
| case 0x0312: |
| Info("Philips PCVC750K (ToUCam Pro Scan) USB webcam detected.\n"); |
| name = "Philips 750 webcam"; |
| type_id = 750; |
| break; |
| default: |
| return -ENODEV; |
| break; |
| } |
| } |
| else if (vendor_id == 0x069A) { |
| switch(product_id) { |
| case 0x0001: |
| 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: |
| Info("Logitech QuickCam Pro 3000 USB webcam detected.\n"); |
| name = "Logitech QuickCam Pro 3000"; |
| type_id = 730; |
| break; |
| case 0x08b1: |
| Info("Logitech QuickCam Notebook Pro USB webcam detected.\n"); |
| name = "Logitech QuickCam Notebook Pro"; |
| type_id = 740; /* ?? unknown sensor */ |
| break; |
| case 0x08b2: |
| Info("Logitech QuickCam 4000 Pro USB webcam detected.\n"); |
| name = "Logitech QuickCam Pro 4000"; |
| type_id = 740; /* CCD sensor */ |
| break; |
| case 0x08b3: |
| Info("Logitech QuickCam Zoom USB webcam detected.\n"); |
| name = "Logitech QuickCam Zoom"; |
| type_id = 740; /* ?? unknown sensor */ |
| 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: |
| Info("Samsung MPC-C10 USB webcam detected.\n"); |
| name = "Samsung MPC-C10"; |
| type_id = 675; |
| break; |
| case 0x9001: |
| Info("Samsung MPC-C30 USB webcam detected.\n"); |
| name = "Samsung MPC-C30"; |
| type_id = 675; |
| break; |
| default: |
| return -ENODEV; |
| break; |
| } |
| } |
| else if (vendor_id == 0x041e) { |
| switch(product_id) { |
| case 0x400c: |
| Info("Creative Labs Webcam 5 detected.\n"); |
| name = "Creative Labs Webcam 5"; |
| type_id = 730; |
| break; |
| default: |
| return -ENODEV; |
| break; |
| } |
| } |
| else if (vendor_id == 0x04cc) { |
| switch(product_id) { |
| case 0x8116: |
| Info("Sotec Afina Eye USB webcam detected.\n"); |
| name = "Sotec Afina Eye"; |
| type_id = 730; |
| break; |
| default: |
| return -ENODEV; |
| break; |
| } |
| } |
| else if (vendor_id == 0x0d81) { |
| switch(product_id) { |
| case 0x1900: |
| Info("Visionite VCS-UC300 USB webcam detected.\n"); |
| name = "Visionite VCS-UC300"; |
| type_id = 740; /* CCD sensor */ |
| break; |
| case 0x1910: |
| 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); |
| Trace(TRACE_PROBE, "Device serial number is %s\n", serial_number); |
| |
| if (udev->descriptor.bNumConfigurations > 1) |
| Info("Warning: more than 1 configuration available.\n"); |
| |
| /* Allocate structure, initialize pointers, mutexes, etc. and link it to the usb_device */ |
| pdev = kmalloc(sizeof(struct pwc_device), GFP_KERNEL); |
| if (pdev == NULL) { |
| Err("Oops, could not allocate memory for pwc_device.\n"); |
| return -ENOMEM; |
| } |
| memset(pdev, 0, sizeof(struct pwc_device)); |
| pdev->type = type_id; |
| pwc_construct(pdev); |
| |
| init_MUTEX(&pdev->modlock); |
| pdev->ptrlock = SPIN_LOCK_UNLOCKED; |
| |
| pdev->udev = udev; |
| init_waitqueue_head(&pdev->frameq); |
| init_waitqueue_head(&pdev->remove_ok); |
| pdev->vcompression = pwc_preferred_compression; |
| |
| /* Now hook it up to the video subsystem */ |
| vdev = kmalloc(sizeof(struct video_device), GFP_KERNEL); |
| if (vdev == NULL) { |
| Err("Oops, could not allocate memory for video_device.\n"); |
| return -ENOMEM; |
| } |
| memcpy(vdev, &pwc_template, sizeof(pwc_template)); |
| strcpy(vdev->name, name); |
| SET_MODULE_OWNER(vdev); |
| pdev->vdev = vdev; |
| vdev->priv = pdev; |
| |
| pdev->release = udev->descriptor.bcdDevice; |
| Trace(TRACE_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; |
| Trace(TRACE_PROBE, "Found hint, will try to register as /dev/video%d\n", video_nr); |
| break; |
| } |
| } |
| } |
| |
| i = video_register_device(vdev, VFL_TYPE_GRABBER, video_nr); |
| if (i < 0) { |
| Err("Failed to register as video device (%d).\n", i); |
| return -EIO; |
| } |
| else { |
| Trace(TRACE_PROBE, "Registered video struct at 0x%p.\n", vdev); |
| Info("Registered as /dev/video%d.\n", vdev->minor & 0x3F); |
| } |
| /* occupy slot */ |
| if (hint < MAX_DEV_HINTS) |
| device_hint[hint].pdev = pdev; |
| |
| Trace(TRACE_PROBE, "probe() function returning struct at 0x%p.\n", pdev); |
| usb_set_intfdata (intf, pdev); |
| return 0; |
| } |
| |
| /* The user janked out the cable... */ |
| static void usb_pwc_disconnect(struct usb_interface *intf) |
| { |
| struct pwc_device *pdev; |
| int hint; |
| DECLARE_WAITQUEUE(wait, current); |
| |
| lock_kernel(); |
| free_mem_leak(); |
| |
| pdev = usb_get_intfdata (intf); |
| usb_set_intfdata (intf, NULL); |
| if (pdev == NULL) { |
| Err("pwc_disconnect() Called without private pointer.\n"); |
| goto disconnect_out; |
| } |
| if (pdev->udev == NULL) { |
| Err("pwc_disconnect() already called for %p\n", pdev); |
| goto disconnect_out; |
| } |
| if (pdev->udev != interface_to_usbdev(intf)) { |
| Err("pwc_disconnect() Woops: pointer mismatch udev/pdev.\n"); |
| goto disconnect_out; |
| } |
| #ifdef PWC_MAGIC |
| if (pdev->magic != PWC_MAGIC) { |
| Err("pwc_disconnect() Magic number failed. Consult your scrolls and try again.\n"); |
| goto disconnect_out; |
| } |
| #endif |
| |
| pdev->unplugged = 1; |
| if (pdev->vdev != NULL) { |
| Trace(TRACE_PROBE, "Unregistering video device.\n"); |
| video_unregister_device(pdev->vdev); |
| if (pdev->vopen) { |
| Info("Disconnected while device/video is open!\n"); |
| |
| /* Wake up any processes that might be waiting for |
| a frame, let them return an error condition |
| */ |
| wake_up(&pdev->frameq); |
| |
| /* Wait until we get a 'go' from _close(). This used |
| to have a gigantic race condition, since we kfree() |
| stuff here, but we have to wait until close() |
| is finished. |
| */ |
| |
| Trace(TRACE_PROBE, "Sleeping on remove_ok.\n"); |
| add_wait_queue(&pdev->remove_ok, &wait); |
| set_current_state(TASK_UNINTERRUPTIBLE); |
| /* ... wait ... */ |
| schedule(); |
| remove_wait_queue(&pdev->remove_ok, &wait); |
| set_current_state(TASK_RUNNING); |
| Trace(TRACE_PROBE, "Done sleeping.\n"); |
| set_mem_leak(pdev->vdev); |
| pdev->vdev = NULL; |
| } |
| else { |
| /* Normal disconnect; remove from available devices */ |
| kfree(pdev->vdev); |
| pdev->vdev = NULL; |
| } |
| } |
| |
| 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; |
| |
| pdev->udev = NULL; |
| unlock_kernel(); |
| kfree(pdev); |
| } |
| |
| |
| /* *grunt* We have to do atoi ourselves :-( */ |
| static int pwc_atoi(const char *s) |
| { |
| int k = 0; |
| |
| k = 0; |
| while (*s != '\0' && *s >= '0' && *s <= '9') { |
| k = 10 * k + (*s - '0'); |
| s++; |
| } |
| return k; |
| } |
| |
| |
| /* |
| * Initialization code & module stuff |
| */ |
| |
| static char *size = NULL; |
| static int fps = 0; |
| static int fbufs = 0; |
| static int mbufs = 0; |
| static int trace = -1; |
| static int compression = -1; |
| static int leds[2] = { -1, -1 }; |
| static char *dev_hint[10] = { }; |
| |
| MODULE_PARM(size, "s"); |
| MODULE_PARM_DESC(size, "Initial image size. One of sqcif, qsif, qcif, sif, cif, vga"); |
| MODULE_PARM(fps, "i"); |
| MODULE_PARM_DESC(fps, "Initial frames per second. Varies with model, useful range 5-30"); |
| MODULE_PARM(fbufs, "i"); |
| MODULE_PARM_DESC(fbufs, "Number of internal frame buffers to reserve"); |
| MODULE_PARM(mbufs, "i"); |
| MODULE_PARM_DESC(mbufs, "Number of external (mmap()ed) image buffers"); |
| MODULE_PARM(trace, "i"); |
| MODULE_PARM_DESC(trace, "For debugging purposes"); |
| MODULE_PARM(power_save, "i"); |
| MODULE_PARM_DESC(power_save, "Turn power save feature in camera on or off"); |
| MODULE_PARM(compression, "i"); |
| MODULE_PARM_DESC(compression, "Preferred compression quality. Range 0 (uncompressed) to 3 (high compression)"); |
| MODULE_PARM(leds, "2i"); |
| MODULE_PARM_DESC(leds, "LED on,off time in milliseconds"); |
| MODULE_PARM(dev_hint, "0-10s"); |
| MODULE_PARM_DESC(dev_hint, "Device node hints"); |
| |
| MODULE_DESCRIPTION("Philips & OEM USB webcam driver"); |
| MODULE_AUTHOR("Nemosoft Unv. <nemosoft@smcc.demon.nl>"); |
| MODULE_LICENSE("GPL"); |
| |
| static int __init usb_pwc_init(void) |
| { |
| int i, sz; |
| char *sizenames[PSZ_MAX] = { "sqcif", "qsif", "qcif", "sif", "cif", "vga" }; |
| |
| Info("Philips PCA645/646 + PCVC675/680/690 + PCVC730/740/750 webcam module version " PWC_VERSION " loaded.\n"); |
| Info("Also supports the Askey VC010, various Logitech QuickCams, Samsung MPC-C10 and MPC-C30,\n"); |
| Info("the Creative WebCam 5, SOTEC Afina Eye and Visionite VCS-UC300 and VCS-UM100.\n"); |
| |
| if (fps) { |
| if (fps < 4 || fps > 30) { |
| Err("Framerate out of bounds (4-30).\n"); |
| return -EINVAL; |
| } |
| default_fps = fps; |
| Info("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) { |
| Err("Size not recognized; try size=[sqcif | qsif | qcif | sif | cif | vga].\n"); |
| return -EINVAL; |
| } |
| Info("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) { |
| Err("Illegal number of mmap() buffers; use a number between 1 and %d.\n", MAX_IMAGES); |
| return -EINVAL; |
| } |
| default_mbufs = mbufs; |
| Info("Number of image buffers set to %d.\n", default_mbufs); |
| } |
| if (fbufs) { |
| if (fbufs < 2 || fbufs > MAX_FRAMES) { |
| Err("Illegal number of frame buffers; use a number between 2 and %d.\n", MAX_FRAMES); |
| return -EINVAL; |
| } |
| default_fbufs = fbufs; |
| Info("Number of frame buffers set to %d.\n", default_fbufs); |
| } |
| if (trace >= 0) { |
| Info("Trace options: 0x%04x\n", trace); |
| pwc_trace = trace; |
| } |
| if (compression >= 0) { |
| if (compression > 3) { |
| Err("Invalid compression setting; use a number between 0 (uncompressed) and 3 (high).\n"); |
| return -EINVAL; |
| } |
| pwc_preferred_compression = compression; |
| Info("Preferred compression set to %d.\n", pwc_preferred_compression); |
| } |
| if (power_save) |
| Info("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. Basicly, 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) { |
| Err("Malformed camera hint: the colon must be after the dot.\n"); |
| return -EINVAL; |
| } |
| |
| if (*colon == '\0') { |
| /* No colon */ |
| if (*dot != '\0') { |
| Err("Malformed camera hint: no colon + device node given.\n"); |
| return -EINVAL; |
| } |
| else { |
| /* No type or serial number specified, just a number. */ |
| device_hint[i].device_node = pwc_atoi(s); |
| } |
| } |
| else { |
| /* There's a colon, so we have at least a type and a device node */ |
| device_hint[i].type = pwc_atoi(s); |
| device_hint[i].device_node = pwc_atoi(colon + 1); |
| if (*dot != '\0') { |
| /* There's a serial number as well */ |
| int k; |
| |
| dot++; |
| k = 0; |
| while (*dot != ':' && k < 29) { |
| device_hint[i].serial_number[k++] = *dot; |
| dot++; |
| } |
| device_hint[i].serial_number[k] = '\0'; |
| } |
| } |
| #if PWC_DEBUG |
| Debug("device_hint[%d]:\n", i); |
| Debug(" type : %d\n", device_hint[i].type); |
| Debug(" serial# : %s\n", device_hint[i].serial_number); |
| Debug(" node : %d\n", device_hint[i].device_node); |
| #endif |
| } |
| else |
| device_hint[i].type = 0; /* not filled */ |
| } /* ..for MAX_DEV_HINTS */ |
| |
| init_MUTEX(&mem_lock); |
| Trace(TRACE_PROBE, "Registering driver at address 0x%p.\n", &pwc_driver); |
| return usb_register(&pwc_driver); |
| } |
| |
| static void __exit usb_pwc_exit(void) |
| { |
| free_mem_leak(); |
| Trace(TRACE_MODULE, "Deregistering driver.\n"); |
| usb_deregister(&pwc_driver); |
| Info("Philips webcam module removed.\n"); |
| } |
| |
| module_init(usb_pwc_init); |
| module_exit(usb_pwc_exit); |
| |