/* em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB video capture devices Copyright (C) 2005 Ludovico Cavedon Markus Rechberger Mauro Carvalho Chehab Sascha Sommer Some parts based on SN9C10x PC Camera Controllers GPL driver made by Luca Risolia This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include #include #include #include #include #include #include "em28xx.h" #include #include #define DRIVER_AUTHOR "Ludovico Cavedon , " \ "Markus Rechberger , " \ "Mauro Carvalho Chehab , " \ "Sascha Sommer " #define DRIVER_NAME "em28xx" #define DRIVER_DESC "Empia em28xx based USB video device driver" #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 0, 1) #define em28xx_videodbg(fmt, arg...) do {\ if (video_debug) \ printk(KERN_INFO "%s %s :"fmt, \ dev->name, __FUNCTION__ , ##arg); } while (0) MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); static LIST_HEAD(em28xx_devlist); static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET }; module_param_array(card, int, NULL, 0444); module_param_array(video_nr, int, NULL, 0444); module_param_array(vbi_nr, int, NULL, 0444); MODULE_PARM_DESC(card,"card type"); MODULE_PARM_DESC(video_nr,"video device numbers"); MODULE_PARM_DESC(vbi_nr,"vbi device numbers"); static unsigned int video_debug = 0; module_param(video_debug,int,0644); MODULE_PARM_DESC(video_debug,"enable debug messages [video]"); /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */ static unsigned long em28xx_devused; /* supported tv norms */ static struct em28xx_tvnorm tvnorms[] = { { .name = "PAL", .id = V4L2_STD_PAL, .mode = VIDEO_MODE_PAL, }, { .name = "NTSC", .id = V4L2_STD_NTSC, .mode = VIDEO_MODE_NTSC, }, { .name = "SECAM", .id = V4L2_STD_SECAM, .mode = VIDEO_MODE_SECAM, }, { .name = "PAL-M", .id = V4L2_STD_PAL_M, .mode = VIDEO_MODE_PAL, } }; #define TVNORMS ARRAY_SIZE(tvnorms) /* supported controls */ /* Common to all boards */ static struct v4l2_queryctrl em28xx_qctrl[] = { { .id = V4L2_CID_AUDIO_VOLUME, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Volume", .minimum = 0x0, .maximum = 0x1f, .step = 0x1, .default_value = 0x1f, .flags = 0, },{ .id = V4L2_CID_AUDIO_MUTE, .type = V4L2_CTRL_TYPE_BOOLEAN, .name = "Mute", .minimum = 0, .maximum = 1, .step = 1, .default_value = 1, .flags = 0, } }; static struct usb_driver em28xx_usb_driver; static DEFINE_MUTEX(em28xx_sysfs_lock); static DECLARE_RWSEM(em28xx_disconnect); /********************* v4l2 interface ******************************************/ /* * em28xx_config() * inits registers with sane defaults */ static int em28xx_config(struct em28xx *dev) { /* Sets I2C speed to 100 KHz */ if (!dev->is_em2800) em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1); /* enable vbi capturing */ /* em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */ /* em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */ em28xx_write_regs_req(dev,0x00,0x11,"\x51",1); em28xx_audio_usb_mute(dev, 1); dev->mute = 1; /* maybe not the right place... */ dev->volume = 0x1f; em28xx_audio_analog_set(dev); em28xx_audio_analog_setup(dev); em28xx_outfmt_set_yuv422(dev); em28xx_colorlevels_set_default(dev); em28xx_compression_disable(dev); return 0; } /* * em28xx_config_i2c() * configure i2c attached devices */ static void em28xx_config_i2c(struct em28xx *dev) { struct v4l2_routing route; route.input = INPUT(dev->ctl_input)->vmux; route.output = 0; em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL); em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route); em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL); } /* * em28xx_empty_framequeues() * prepare queues for incoming and outgoing frames */ static void em28xx_empty_framequeues(struct em28xx *dev) { u32 i; INIT_LIST_HEAD(&dev->inqueue); INIT_LIST_HEAD(&dev->outqueue); for (i = 0; i < EM28XX_NUM_FRAMES; i++) { dev->frame[i].state = F_UNUSED; dev->frame[i].buf.bytesused = 0; } } static void video_mux(struct em28xx *dev, int index) { int ainput; struct v4l2_routing route; route.input = INPUT(index)->vmux; route.output = 0; dev->ctl_input = index; dev->ctl_ainput = INPUT(index)->amux; em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route); em28xx_videodbg("Setting input index=%d, vmux=%d, amux=%d\n",index,route.input,dev->ctl_ainput); if (dev->has_msp34xx) { if (dev->i2s_speed) em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed); route.input = dev->ctl_ainput; route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1); /* Note: this is msp3400 specific */ em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route); ainput = EM28XX_AUDIO_SRC_TUNER; em28xx_audio_source(dev, ainput); } else { switch (dev->ctl_ainput) { case 0: ainput = EM28XX_AUDIO_SRC_TUNER; break; default: ainput = EM28XX_AUDIO_SRC_LINE; } em28xx_audio_source(dev, ainput); } } /* * em28xx_v4l2_open() * inits the device and starts isoc transfer */ static int em28xx_v4l2_open(struct inode *inode, struct file *filp) { int minor = iminor(inode); int errCode = 0; struct em28xx *h,*dev = NULL; list_for_each_entry(h, &em28xx_devlist, devlist) { if (h->vdev->minor == minor) { dev = h; dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; } if (h->vbi_dev->minor == minor) { dev = h; dev->type = V4L2_BUF_TYPE_VBI_CAPTURE; } } if (NULL == dev) return -ENODEV; em28xx_videodbg("open minor=%d type=%s users=%d\n", minor,v4l2_type_names[dev->type],dev->users); if (!down_read_trylock(&em28xx_disconnect)) return -ERESTARTSYS; if (dev->users) { em28xx_warn("this driver can be opened only once\n"); up_read(&em28xx_disconnect); return -EBUSY; } mutex_init(&dev->fileop_lock); /* to 1 == available */ spin_lock_init(&dev->queue_lock); init_waitqueue_head(&dev->wait_frame); init_waitqueue_head(&dev->wait_stream); mutex_lock(&dev->lock); if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { em28xx_set_alternate(dev); dev->width = norm_maxw(dev); dev->height = norm_maxh(dev); dev->frame_size = dev->width * dev->height * 2; dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */ dev->bytesperline = dev->width * 2; dev->hscale = 0; dev->vscale = 0; em28xx_capture_start(dev, 1); em28xx_resolution_set(dev); /* device needs to be initialized before isoc transfer */ video_mux(dev, 0); /* start the transfer */ errCode = em28xx_init_isoc(dev); if (errCode) goto err; } dev->users++; filp->private_data = dev; dev->io = IO_NONE; dev->stream = STREAM_OFF; dev->num_frames = 0; /* prepare queues */ em28xx_empty_framequeues(dev); dev->state |= DEV_INITIALIZED; err: mutex_unlock(&dev->lock); up_read(&em28xx_disconnect); return errCode; } /* * em28xx_realease_resources() * unregisters the v4l2,i2c and usb devices * called when the device gets disconected or at module unload */ static void em28xx_release_resources(struct em28xx *dev) { mutex_lock(&em28xx_sysfs_lock); /*FIXME: I2C IR should be disconnected */ em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n", dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN, dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN); list_del(&dev->devlist); video_unregister_device(dev->vdev); video_unregister_device(dev->vbi_dev); em28xx_i2c_unregister(dev); usb_put_dev(dev->udev); mutex_unlock(&em28xx_sysfs_lock); /* Mark device as unused */ em28xx_devused&=~(1<devno); } /* * em28xx_v4l2_close() * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls */ static int em28xx_v4l2_close(struct inode *inode, struct file *filp) { int errCode; struct em28xx *dev=filp->private_data; em28xx_videodbg("users=%d\n", dev->users); mutex_lock(&dev->lock); em28xx_uninit_isoc(dev); em28xx_release_buffers(dev); /* the device is already disconnect, free the remaining resources */ if (dev->state & DEV_DISCONNECTED) { em28xx_release_resources(dev); mutex_unlock(&dev->lock); kfree(dev); return 0; } /* set alternate 0 */ dev->alt = 0; em28xx_videodbg("setting alternate 0\n"); errCode = usb_set_interface(dev->udev, 0, 0); if (errCode < 0) { em28xx_errdev ("cannot change alternate number to 0 (error=%i)\n", errCode); } dev->users--; wake_up_interruptible_nr(&dev->open, 1); mutex_unlock(&dev->lock); return 0; } /* * em28xx_v4l2_read() * will allocate buffers when called for the first time */ static ssize_t em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count, loff_t * f_pos) { struct em28xx_frame_t *f, *i; unsigned long lock_flags; int ret = 0; struct em28xx *dev = filp->private_data; if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { em28xx_videodbg("V4l2_Buf_type_videocapture is set\n"); } if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) { em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n"); em28xx_videodbg("not supported yet! ...\n"); if (copy_to_user(buf, "", 1)) { mutex_unlock(&dev->fileop_lock); return -EFAULT; } return (1); } if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) { em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n"); em28xx_videodbg("not supported yet! ...\n"); if (copy_to_user(buf, "", 1)) { mutex_unlock(&dev->fileop_lock); return -EFAULT; } return (1); } if (mutex_lock_interruptible(&dev->fileop_lock)) return -ERESTARTSYS; if (dev->state & DEV_DISCONNECTED) { em28xx_videodbg("device not present\n"); mutex_unlock(&dev->fileop_lock); return -ENODEV; } if (dev->state & DEV_MISCONFIGURED) { em28xx_videodbg("device misconfigured; close and open it again\n"); mutex_unlock(&dev->fileop_lock); return -EIO; } if (dev->io == IO_MMAP) { em28xx_videodbg ("IO method is set to mmap; close and open" " the device again to choose the read method\n"); mutex_unlock(&dev->fileop_lock); return -EINVAL; } if (dev->io == IO_NONE) { if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) { em28xx_errdev("read failed, not enough memory\n"); mutex_unlock(&dev->fileop_lock); return -ENOMEM; } dev->io = IO_READ; dev->stream = STREAM_ON; em28xx_queue_unusedframes(dev); } if (!count) { mutex_unlock(&dev->fileop_lock); return 0; } if (list_empty(&dev->outqueue)) { if (filp->f_flags & O_NONBLOCK) { mutex_unlock(&dev->fileop_lock); return -EAGAIN; } ret = wait_event_interruptible (dev->wait_frame, (!list_empty(&dev->outqueue)) || (dev->state & DEV_DISCONNECTED)); if (ret) { mutex_unlock(&dev->fileop_lock); return ret; } if (dev->state & DEV_DISCONNECTED) { mutex_unlock(&dev->fileop_lock); return -ENODEV; } } f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame); spin_lock_irqsave(&dev->queue_lock, lock_flags); list_for_each_entry(i, &dev->outqueue, frame) i->state = F_UNUSED; INIT_LIST_HEAD(&dev->outqueue); spin_unlock_irqrestore(&dev->queue_lock, lock_flags); em28xx_queue_unusedframes(dev); if (count > f->buf.length) count = f->buf.length; if (copy_to_user(buf, f->bufmem, count)) { mutex_unlock(&dev->fileop_lock); return -EFAULT; } *f_pos += count; mutex_unlock(&dev->fileop_lock); return count; } /* * em28xx_v4l2_poll() * will allocate buffers when called for the first time */ static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait) { unsigned int mask = 0; struct em28xx *dev = filp->private_data; if (mutex_lock_interruptible(&dev->fileop_lock)) return POLLERR; if (dev->state & DEV_DISCONNECTED) { em28xx_videodbg("device not present\n"); } else if (dev->state & DEV_MISCONFIGURED) { em28xx_videodbg("device is misconfigured; close and open it again\n"); } else { if (dev->io == IO_NONE) { if (!em28xx_request_buffers (dev, EM28XX_NUM_READ_FRAMES)) { em28xx_warn ("poll() failed, not enough memory\n"); } else { dev->io = IO_READ; dev->stream = STREAM_ON; } } if (dev->io == IO_READ) { em28xx_queue_unusedframes(dev); poll_wait(filp, &dev->wait_frame, wait); if (!list_empty(&dev->outqueue)) mask |= POLLIN | POLLRDNORM; mutex_unlock(&dev->fileop_lock); return mask; } } mutex_unlock(&dev->fileop_lock); return POLLERR; } /* * em28xx_vm_open() */ static void em28xx_vm_open(struct vm_area_struct *vma) { struct em28xx_frame_t *f = vma->vm_private_data; f->vma_use_count++; } /* * em28xx_vm_close() */ static void em28xx_vm_close(struct vm_area_struct *vma) { /* NOTE: buffers are not freed here */ struct em28xx_frame_t *f = vma->vm_private_data; if (f->vma_use_count) f->vma_use_count--; } static struct vm_operations_struct em28xx_vm_ops = { .open = em28xx_vm_open, .close = em28xx_vm_close, }; /* * em28xx_v4l2_mmap() */ static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma) { unsigned long size = vma->vm_end - vma->vm_start, start = vma->vm_start; void *pos; u32 i; struct em28xx *dev = filp->private_data; if (mutex_lock_interruptible(&dev->fileop_lock)) return -ERESTARTSYS; if (dev->state & DEV_DISCONNECTED) { em28xx_videodbg("mmap: device not present\n"); mutex_unlock(&dev->fileop_lock); return -ENODEV; } if (dev->state & DEV_MISCONFIGURED) { em28xx_videodbg ("mmap: Device is misconfigured; close and " "open it again\n"); mutex_unlock(&dev->fileop_lock); return -EIO; } if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) || size != PAGE_ALIGN(dev->frame[0].buf.length)) { mutex_unlock(&dev->fileop_lock); return -EINVAL; } for (i = 0; i < dev->num_frames; i++) { if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff) break; } if (i == dev->num_frames) { em28xx_videodbg("mmap: user supplied mapping address is out of range\n"); mutex_unlock(&dev->fileop_lock); return -EINVAL; } /* VM_IO is eventually going to replace PageReserved altogether */ vma->vm_flags |= VM_IO; vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */ pos = dev->frame[i].bufmem; while (size > 0) { /* size is page-aligned */ if (vm_insert_page(vma, start, vmalloc_to_page(pos))) { em28xx_videodbg("mmap: vm_insert_page failed\n"); mutex_unlock(&dev->fileop_lock); return -EAGAIN; } start += PAGE_SIZE; pos += PAGE_SIZE; size -= PAGE_SIZE; } vma->vm_ops = &em28xx_vm_ops; vma->vm_private_data = &dev->frame[i]; em28xx_vm_open(vma); mutex_unlock(&dev->fileop_lock); return 0; } /* * em28xx_get_ctrl() * return the current saturation, brightness or contrast, mute state */ static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl) { switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: ctrl->value = dev->mute; return 0; case V4L2_CID_AUDIO_VOLUME: ctrl->value = dev->volume; return 0; default: return -EINVAL; } } /* * em28xx_set_ctrl() * mute or set new saturation, brightness or contrast */ static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl) { switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: if (ctrl->value != dev->mute) { dev->mute = ctrl->value; em28xx_audio_usb_mute(dev, ctrl->value); return em28xx_audio_analog_set(dev); } return 0; case V4L2_CID_AUDIO_VOLUME: dev->volume = ctrl->value; return em28xx_audio_analog_set(dev); default: return -EINVAL; } } /* * em28xx_stream_interrupt() * stops streaming */ static int em28xx_stream_interrupt(struct em28xx *dev) { int ret = 0; /* stop reading from the device */ dev->stream = STREAM_INTERRUPT; ret = wait_event_timeout(dev->wait_stream, (dev->stream == STREAM_OFF) || (dev->state & DEV_DISCONNECTED), EM28XX_URB_TIMEOUT); if (dev->state & DEV_DISCONNECTED) return -ENODEV; else if (ret) { dev->state |= DEV_MISCONFIGURED; em28xx_videodbg("device is misconfigured; close and " "open /dev/video%d again\n", dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN); return ret; } return 0; } static int em28xx_set_norm(struct em28xx *dev, int width, int height) { unsigned int hscale, vscale; unsigned int maxh, maxw; maxw = norm_maxw(dev); maxh = norm_maxh(dev); /* width must even because of the YUYV format */ /* height must be even because of interlacing */ height &= 0xfffe; width &= 0xfffe; if (height < 32) height = 32; if (height > maxh) height = maxh; if (width < 48) width = 48; if (width > maxw) width = maxw; if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000) hscale = 0x3fff; width = (((unsigned long)maxw) << 12) / (hscale + 4096L); if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000) vscale = 0x3fff; height = (((unsigned long)maxh) << 12) / (vscale + 4096L); /* set new image size */ dev->width = width; dev->height = height; dev->frame_size = dev->width * dev->height * 2; dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */ dev->bytesperline = dev->width * 2; dev->hscale = hscale; dev->vscale = vscale; em28xx_resolution_set(dev); return 0; } static int em28xx_get_fmt(struct em28xx *dev, struct v4l2_format *format) { em28xx_videodbg("VIDIOC_G_FMT: type=%s\n", (format->type ==V4L2_BUF_TYPE_VIDEO_CAPTURE) ? "V4L2_BUF_TYPE_VIDEO_CAPTURE" : (format->type ==V4L2_BUF_TYPE_VBI_CAPTURE) ? "V4L2_BUF_TYPE_VBI_CAPTURE" : (format->type ==V4L2_CAP_SLICED_VBI_CAPTURE) ? "V4L2_BUF_TYPE_SLICED_VBI_CAPTURE " : "not supported"); switch (format->type) { case V4L2_BUF_TYPE_VIDEO_CAPTURE: { format->fmt.pix.width = dev->width; format->fmt.pix.height = dev->height; format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; format->fmt.pix.bytesperline = dev->bytesperline; format->fmt.pix.sizeimage = dev->frame_size; format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */ em28xx_videodbg("VIDIOC_G_FMT: %dx%d\n", dev->width, dev->height); break; } case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: { format->fmt.sliced.service_set=0; em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format); if (format->fmt.sliced.service_set==0) return -EINVAL; break; } default: return -EINVAL; } return (0); } static int em28xx_set_fmt(struct em28xx *dev, unsigned int cmd, struct v4l2_format *format) { u32 i; int ret = 0; int width = format->fmt.pix.width; int height = format->fmt.pix.height; unsigned int hscale, vscale; unsigned int maxh, maxw; maxw = norm_maxw(dev); maxh = norm_maxh(dev); em28xx_videodbg("%s: type=%s\n", cmd == VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT", format->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ? "V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type == V4L2_BUF_TYPE_VBI_CAPTURE ? "V4L2_BUF_TYPE_VBI_CAPTURE " : "not supported"); if (format->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) { em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format); if (format->fmt.sliced.service_set==0) return -EINVAL; return 0; } if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) return -EINVAL; em28xx_videodbg("%s: requested %dx%d\n", cmd == VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT", format->fmt.pix.width, format->fmt.pix.height); /* FIXME: Move some code away from here */ /* width must even because of the YUYV format */ /* height must be even because of interlacing */ height &= 0xfffe; width &= 0xfffe; if (height < 32) height = 32; if (height > maxh) height = maxh; if (width < 48) width = 48; if (width > maxw) width = maxw; if(dev->is_em2800){ /* the em2800 can only scale down to 50% */ if(height % (maxh / 2)) height=maxh; if(width % (maxw / 2)) width=maxw; /* according to empiatech support */ /* the MaxPacketSize is to small to support */ /* framesizes larger than 640x480 @ 30 fps */ /* or 640x576 @ 25 fps. As this would cut */ /* of a part of the image we prefer */ /* 360x576 or 360x480 for now */ if(width == maxw && height == maxh) width /= 2; } if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000) hscale = 0x3fff; width = (((unsigned long)maxw) << 12) / (hscale + 4096L); if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000) vscale = 0x3fff; height = (((unsigned long)maxh) << 12) / (vscale + 4096L); format->fmt.pix.width = width; format->fmt.pix.height = height; format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; format->fmt.pix.bytesperline = width * 2; format->fmt.pix.sizeimage = width * 2 * height; format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; format->fmt.pix.field = V4L2_FIELD_INTERLACED; em28xx_videodbg("%s: returned %dx%d (%d, %d)\n", cmd == VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :"VIDIOC_S_FMT", format->fmt.pix.width, format->fmt.pix.height, hscale, vscale); if (cmd == VIDIOC_TRY_FMT) return 0; for (i = 0; i < dev->num_frames; i++) if (dev->frame[i].vma_use_count) { em28xx_videodbg("VIDIOC_S_FMT failed. " "Unmap the buffers first.\n"); return -EINVAL; } /* stop io in case it is already in progress */ if (dev->stream == STREAM_ON) { em28xx_videodbg("VIDIOC_SET_FMT: interrupting stream\n"); if ((ret = em28xx_stream_interrupt(dev))) return ret; } em28xx_release_buffers(dev); dev->io = IO_NONE; /* set new image size */ dev->width = width; dev->height = height; dev->frame_size = dev->width * dev->height * 2; dev->field_size = dev->frame_size >> 1; dev->bytesperline = dev->width * 2; dev->hscale = hscale; dev->vscale = vscale; em28xx_uninit_isoc(dev); em28xx_set_alternate(dev); em28xx_capture_start(dev, 1); em28xx_resolution_set(dev); em28xx_init_isoc(dev); return 0; } /* * em28xx_v4l2_do_ioctl() * This function is _not_ called directly, but from * em28xx_v4l2_ioctl. Userspace * copying is done already, arg is a kernel pointer. */ static int em28xx_do_ioctl(struct inode *inode, struct file *filp, struct em28xx *dev, unsigned int cmd, void *arg, v4l2_kioctl driver_ioctl) { int ret; switch (cmd) { /* ---------- tv norms ---------- */ case VIDIOC_ENUMSTD: { struct v4l2_standard *e = arg; unsigned int i; i = e->index; if (i >= TVNORMS) return -EINVAL; ret = v4l2_video_std_construct(e, tvnorms[e->index].id, tvnorms[e->index].name); e->index = i; if (ret < 0) return ret; return 0; } case VIDIOC_G_STD: { v4l2_std_id *id = arg; *id = dev->tvnorm->id; return 0; } case VIDIOC_S_STD: { v4l2_std_id *id = arg; unsigned int i; for (i = 0; i < TVNORMS; i++) if (*id == tvnorms[i].id) break; if (i == TVNORMS) for (i = 0; i < TVNORMS; i++) if (*id & tvnorms[i].id) break; if (i == TVNORMS) return -EINVAL; mutex_lock(&dev->lock); dev->tvnorm = &tvnorms[i]; em28xx_set_norm(dev, dev->width, dev->height); em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->tvnorm->id); mutex_unlock(&dev->lock); return 0; } /* ------ input switching ---------- */ case VIDIOC_ENUMINPUT: { struct v4l2_input *i = arg; unsigned int n; static const char *iname[] = { [EM28XX_VMUX_COMPOSITE1] = "Composite1", [EM28XX_VMUX_COMPOSITE2] = "Composite2", [EM28XX_VMUX_COMPOSITE3] = "Composite3", [EM28XX_VMUX_COMPOSITE4] = "Composite4", [EM28XX_VMUX_SVIDEO] = "S-Video", [EM28XX_VMUX_TELEVISION] = "Television", [EM28XX_VMUX_CABLE] = "Cable TV", [EM28XX_VMUX_DVB] = "DVB", [EM28XX_VMUX_DEBUG] = "for debug only", }; n = i->index; if (n >= MAX_EM28XX_INPUT) return -EINVAL; if (0 == INPUT(n)->type) return -EINVAL; memset(i, 0, sizeof(*i)); i->index = n; i->type = V4L2_INPUT_TYPE_CAMERA; strcpy(i->name, iname[INPUT(n)->type]); if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) || (EM28XX_VMUX_CABLE == INPUT(n)->type)) i->type = V4L2_INPUT_TYPE_TUNER; for (n = 0; n < ARRAY_SIZE(tvnorms); n++) i->std |= tvnorms[n].id; return 0; } case VIDIOC_G_INPUT: { int *i = arg; *i = dev->ctl_input; return 0; } case VIDIOC_S_INPUT: { int *index = arg; if (*index >= MAX_EM28XX_INPUT) return -EINVAL; if (0 == INPUT(*index)->type) return -EINVAL; mutex_lock(&dev->lock); video_mux(dev, *index); mutex_unlock(&dev->lock); return 0; } case VIDIOC_G_AUDIO: { struct v4l2_audio *a = arg; unsigned int index = a->index; if (a->index > 1) return -EINVAL; memset(a, 0, sizeof(*a)); index = dev->ctl_ainput; if (index == 0) { strcpy(a->name, "Television"); } else { strcpy(a->name, "Line In"); } a->capability = V4L2_AUDCAP_STEREO; a->index = index; return 0; } case VIDIOC_S_AUDIO: { struct v4l2_audio *a = arg; if (a->index != dev->ctl_ainput) return -EINVAL; return 0; } /* --- controls ---------------------------------------------- */ case VIDIOC_QUERYCTRL: { struct v4l2_queryctrl *qc = arg; int i, id=qc->id; memset(qc,0,sizeof(*qc)); qc->id=id; if (!dev->has_msp34xx) { for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) { if (qc->id && qc->id == em28xx_qctrl[i].id) { memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc)); return 0; } } } em28xx_i2c_call_clients(dev,cmd,qc); if (qc->type) return 0; else return -EINVAL; } case VIDIOC_G_CTRL: { struct v4l2_control *ctrl = arg; int retval=-EINVAL; if (!dev->has_msp34xx) retval=em28xx_get_ctrl(dev, ctrl); if (retval==-EINVAL) { em28xx_i2c_call_clients(dev,cmd,arg); return 0; } else return retval; } case VIDIOC_S_CTRL: { struct v4l2_control *ctrl = arg; u8 i; if (!dev->has_msp34xx){ for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) { if (ctrl->id == em28xx_qctrl[i].id) { if (ctrl->value < em28xx_qctrl[i].minimum || ctrl->value > em28xx_qctrl[i].maximum) return -ERANGE; return em28xx_set_ctrl(dev, ctrl); } } } em28xx_i2c_call_clients(dev,cmd,arg); return 0; } /* --- tuner ioctls ------------------------------------------ */ case VIDIOC_G_TUNER: { struct v4l2_tuner *t = arg; if (0 != t->index) return -EINVAL; memset(t, 0, sizeof(*t)); strcpy(t->name, "Tuner"); mutex_lock(&dev->lock); /* let clients fill in the remainder of this struct */ em28xx_i2c_call_clients(dev, cmd, t); mutex_unlock(&dev->lock); em28xx_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x\n", t->signal, t->afc); return 0; } case VIDIOC_S_TUNER: { struct v4l2_tuner *t = arg; if (0 != t->index) return -EINVAL; mutex_lock(&dev->lock); /* let clients handle this */ em28xx_i2c_call_clients(dev, cmd, t); mutex_unlock(&dev->lock); return 0; } case VIDIOC_G_FREQUENCY: { struct v4l2_frequency *f = arg; memset(f, 0, sizeof(*f)); f->type = V4L2_TUNER_ANALOG_TV; f->frequency = dev->ctl_freq; return 0; } case VIDIOC_S_FREQUENCY: { struct v4l2_frequency *f = arg; if (0 != f->tuner) return -EINVAL; if (V4L2_TUNER_ANALOG_TV != f->type) return -EINVAL; mutex_lock(&dev->lock); dev->ctl_freq = f->frequency; em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f); mutex_unlock(&dev->lock); return 0; } case VIDIOC_CROPCAP: { struct v4l2_cropcap *cc = arg; if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) return -EINVAL; cc->bounds.left = 0; cc->bounds.top = 0; cc->bounds.width = dev->width; cc->bounds.height = dev->height; cc->defrect = cc->bounds; cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */ cc->pixelaspect.denominator = 59; return 0; } case VIDIOC_STREAMON: { int *type = arg; if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP) return -EINVAL; if (list_empty(&dev->inqueue)) return -EINVAL; dev->stream = STREAM_ON; /* FIXME: Start video capture here? */ em28xx_videodbg("VIDIOC_STREAMON: starting stream\n"); return 0; } case VIDIOC_STREAMOFF: { int *type = arg; int ret; if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP) return -EINVAL; if (dev->stream == STREAM_ON) { em28xx_videodbg ("VIDIOC_STREAMOFF: interrupting stream\n"); if ((ret = em28xx_stream_interrupt(dev))) return ret; } em28xx_empty_framequeues(dev); return 0; } default: return v4l_compat_translate_ioctl(inode, filp, cmd, arg, driver_ioctl); } return 0; } /* * em28xx_v4l2_do_ioctl() * This function is _not_ called directly, but from * em28xx_v4l2_ioctl. Userspace * copying is done already, arg is a kernel pointer. */ static int em28xx_video_do_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, void *arg) { struct em28xx *dev = filp->private_data; if (!dev) return -ENODEV; if (video_debug > 1) v4l_print_ioctl(dev->name,cmd); switch (cmd) { /* --- capabilities ------------------------------------------ */ case VIDIOC_QUERYCAP: { struct v4l2_capability *cap = arg; memset(cap, 0, sizeof(*cap)); strlcpy(cap->driver, "em28xx", sizeof(cap->driver)); strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card)); strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info)); cap->version = EM28XX_VERSION_CODE; cap->capabilities = V4L2_CAP_SLICED_VBI_CAPTURE | V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; if (dev->has_tuner) cap->capabilities |= V4L2_CAP_TUNER; return 0; } /* --- capture ioctls ---------------------------------------- */ case VIDIOC_ENUM_FMT: { struct v4l2_fmtdesc *fmtd = arg; if (fmtd->index != 0) return -EINVAL; memset(fmtd, 0, sizeof(*fmtd)); fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; strcpy(fmtd->description, "Packed YUY2"); fmtd->pixelformat = V4L2_PIX_FMT_YUYV; memset(fmtd->reserved, 0, sizeof(fmtd->reserved)); return 0; } case VIDIOC_G_FMT: return em28xx_get_fmt(dev, (struct v4l2_format *) arg); case VIDIOC_TRY_FMT: case VIDIOC_S_FMT: return em28xx_set_fmt(dev, cmd, (struct v4l2_format *)arg); case VIDIOC_REQBUFS: { struct v4l2_requestbuffers *rb = arg; u32 i; int ret; if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || rb->memory != V4L2_MEMORY_MMAP) return -EINVAL; if (dev->io == IO_READ) { em28xx_videodbg ("method is set to read;" " close and open the device again to" " choose the mmap I/O method\n"); return -EINVAL; } for (i = 0; i < dev->num_frames; i++) if (dev->frame[i].vma_use_count) { em28xx_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped\n"); return -EINVAL; } if (dev->stream == STREAM_ON) { em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n"); if ((ret = em28xx_stream_interrupt(dev))) return ret; } em28xx_empty_framequeues(dev); em28xx_release_buffers(dev); if (rb->count) rb->count = em28xx_request_buffers(dev, rb->count); dev->frame_current = NULL; em28xx_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i\n", rb->count); dev->io = rb->count ? IO_MMAP : IO_NONE; return 0; } case VIDIOC_QUERYBUF: { struct v4l2_buffer *b = arg; if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || b->index >= dev->num_frames || dev->io != IO_MMAP) return -EINVAL; memcpy(b, &dev->frame[b->index].buf, sizeof(*b)); if (dev->frame[b->index].vma_use_count) { b->flags |= V4L2_BUF_FLAG_MAPPED; } if (dev->frame[b->index].state == F_DONE) b->flags |= V4L2_BUF_FLAG_DONE; else if (dev->frame[b->index].state != F_UNUSED) b->flags |= V4L2_BUF_FLAG_QUEUED; return 0; } case VIDIOC_QBUF: { struct v4l2_buffer *b = arg; unsigned long lock_flags; if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || b->index >= dev->num_frames || dev->io != IO_MMAP) { return -EINVAL; } if (dev->frame[b->index].state != F_UNUSED) { return -EAGAIN; } dev->frame[b->index].state = F_QUEUED; /* add frame to fifo */ spin_lock_irqsave(&dev->queue_lock, lock_flags); list_add_tail(&dev->frame[b->index].frame, &dev->inqueue); spin_unlock_irqrestore(&dev->queue_lock, lock_flags); return 0; } case VIDIOC_DQBUF: { struct v4l2_buffer *b = arg; struct em28xx_frame_t *f; unsigned long lock_flags; int ret = 0; if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP) return -EINVAL; if (list_empty(&dev->outqueue)) { if (dev->stream == STREAM_OFF) return -EINVAL; if (filp->f_flags & O_NONBLOCK) return -EAGAIN; ret = wait_event_interruptible (dev->wait_frame, (!list_empty(&dev->outqueue)) || (dev->state & DEV_DISCONNECTED)); if (ret) return ret; if (dev->state & DEV_DISCONNECTED) return -ENODEV; } spin_lock_irqsave(&dev->queue_lock, lock_flags); f = list_entry(dev->outqueue.next, struct em28xx_frame_t, frame); list_del(dev->outqueue.next); spin_unlock_irqrestore(&dev->queue_lock, lock_flags); f->state = F_UNUSED; memcpy(b, &f->buf, sizeof(*b)); if (f->vma_use_count) b->flags |= V4L2_BUF_FLAG_MAPPED; return 0; } default: return em28xx_do_ioctl(inode, filp, dev, cmd, arg, em28xx_video_do_ioctl); } return 0; } /* * em28xx_v4l2_ioctl() * handle v4l2 ioctl the main action happens in em28xx_v4l2_do_ioctl() */ static int em28xx_v4l2_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg) { int ret = 0; struct em28xx *dev = filp->private_data; if (mutex_lock_interruptible(&dev->fileop_lock)) return -ERESTARTSYS; if (dev->state & DEV_DISCONNECTED) { em28xx_errdev("v4l2 ioctl: device not present\n"); mutex_unlock(&dev->fileop_lock); return -ENODEV; } if (dev->state & DEV_MISCONFIGURED) { em28xx_errdev ("v4l2 ioctl: device is misconfigured; close and open it again\n"); mutex_unlock(&dev->fileop_lock); return -EIO; } ret = video_usercopy(inode, filp, cmd, arg, em28xx_video_do_ioctl); mutex_unlock(&dev->fileop_lock); return ret; } static const struct file_operations em28xx_v4l_fops = { .owner = THIS_MODULE, .open = em28xx_v4l2_open, .release = em28xx_v4l2_close, .ioctl = em28xx_v4l2_ioctl, .read = em28xx_v4l2_read, .poll = em28xx_v4l2_poll, .mmap = em28xx_v4l2_mmap, .llseek = no_llseek, .compat_ioctl = v4l_compat_ioctl32, }; /******************************** usb interface *****************************************/ /* * em28xx_init_dev() * allocates and inits the device structs, registers i2c bus and v4l device */ static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev, int minor) { struct em28xx *dev = *devhandle; int retval = -ENOMEM; int errCode, i; unsigned int maxh, maxw; dev->udev = udev; mutex_init(&dev->lock); init_waitqueue_head(&dev->open); dev->em28xx_write_regs = em28xx_write_regs; dev->em28xx_read_reg = em28xx_read_reg; dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len; dev->em28xx_write_regs_req = em28xx_write_regs_req; dev->em28xx_read_reg_req = em28xx_read_reg_req; /* setup video picture settings for saa7113h */ memset(&dev->vpic, 0, sizeof(dev->vpic)); dev->vpic.colour = 128 << 8; dev->vpic.hue = 128 << 8; dev->vpic.brightness = 128 << 8; dev->vpic.contrast = 192 << 8; dev->vpic.whiteness = 128 << 8; /* This one isn't used */ dev->vpic.depth = 16; dev->vpic.palette = VIDEO_PALETTE_YUV422; em28xx_pre_card_setup(dev); errCode = em28xx_config(dev); if (errCode) { em28xx_errdev("error configuring device\n"); em28xx_devused &= ~(1<devno); kfree(dev); return -ENOMEM; } mutex_lock(&dev->lock); /* register i2c bus */ em28xx_i2c_register(dev); /* Do board specific init and eeprom reading */ em28xx_card_setup(dev); /* configure the device */ em28xx_config_i2c(dev); mutex_unlock(&dev->lock); for (i = 0; i < TVNORMS; i++) if (em28xx_boards[dev->model].norm == tvnorms[i].mode) break; if (i == TVNORMS) i = 0; dev->tvnorm = &tvnorms[i]; /* set default norm */ em28xx_videodbg("tvnorm=%s\n", dev->tvnorm->name); maxw = norm_maxw(dev); maxh = norm_maxh(dev); /* set default image size */ dev->width = maxw; dev->height = maxh; dev->interlaced = EM28XX_INTERLACED_DEFAULT; dev->field_size = dev->width * dev->height; dev->frame_size = dev->interlaced ? dev->field_size << 1 : dev->field_size; dev->bytesperline = dev->width * 2; dev->hscale = 0; dev->vscale = 0; dev->ctl_input = 2; errCode = em28xx_config(dev); /* allocate and fill v4l2 device struct */ dev->vdev = video_device_alloc(); if (NULL == dev->vdev) { em28xx_errdev("cannot allocate video_device.\n"); em28xx_devused&=~(1<devno); kfree(dev); return -ENOMEM; } dev->vbi_dev = video_device_alloc(); if (NULL == dev->vbi_dev) { em28xx_errdev("cannot allocate video_device.\n"); kfree(dev->vdev); em28xx_devused&=~(1<devno); kfree(dev); return -ENOMEM; } /* Fills VBI device info */ dev->vbi_dev->type = VFL_TYPE_VBI; dev->vbi_dev->fops = &em28xx_v4l_fops; dev->vbi_dev->minor = -1; dev->vbi_dev->dev = &dev->udev->dev; dev->vbi_dev->release = video_device_release; snprintf(dev->vbi_dev->name, sizeof(dev->vbi_dev->name), "%s#%d %s", "em28xx",dev->devno,"vbi"); /* Fills CAPTURE device info */ dev->vdev->type = VID_TYPE_CAPTURE; if (dev->has_tuner) dev->vdev->type |= VID_TYPE_TUNER; dev->vdev->fops = &em28xx_v4l_fops; dev->vdev->minor = -1; dev->vdev->dev = &dev->udev->dev; dev->vdev->release = video_device_release; snprintf(dev->vdev->name, sizeof(dev->vbi_dev->name), "%s#%d %s", "em28xx",dev->devno,"video"); list_add_tail(&dev->devlist,&em28xx_devlist); /* register v4l2 device */ mutex_lock(&dev->lock); if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER, video_nr[dev->devno]))) { em28xx_errdev("unable to register video device (error=%i).\n", retval); mutex_unlock(&dev->lock); list_del(&dev->devlist); video_device_release(dev->vdev); em28xx_devused&=~(1<devno); kfree(dev); return -ENODEV; } if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI, vbi_nr[dev->devno]) < 0) { printk("unable to register vbi device\n"); mutex_unlock(&dev->lock); list_del(&dev->devlist); video_device_release(dev->vbi_dev); video_device_release(dev->vdev); em28xx_devused&=~(1<devno); kfree(dev); return -ENODEV; } else { printk("registered VBI\n"); } if (dev->has_msp34xx) { /* Send a reset to other chips via gpio */ em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1); msleep(3); em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1); msleep(3); } video_mux(dev, 0); mutex_unlock(&dev->lock); em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n", dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN, dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN); return 0; } /* * em28xx_usb_probe() * checks for supported devices */ static int em28xx_usb_probe(struct usb_interface *interface, const struct usb_device_id *id) { const struct usb_endpoint_descriptor *endpoint; struct usb_device *udev; struct usb_interface *uif; struct em28xx *dev = NULL; int retval = -ENODEV; int i, nr, ifnum; udev = usb_get_dev(interface_to_usbdev(interface)); ifnum = interface->altsetting[0].desc.bInterfaceNumber; /* Check to see next free device and mark as used */ nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS); em28xx_devused|=1<altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) { em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n", udev->descriptor.idVendor,udev->descriptor.idProduct, ifnum, interface->altsetting[0].desc.bInterfaceClass); em28xx_devused&=~(1<descriptor.idVendor,udev->descriptor.idProduct, ifnum, interface->altsetting[0].desc.bInterfaceClass); endpoint = &interface->cur_altsetting->endpoint[1].desc; /* check if the device has the iso in endpoint at the correct place */ if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC) { em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n"); em28xx_devused&=~(1<bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) { em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n"); em28xx_devused&=~(1<= EM28XX_MAXBOARDS) { printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS); em28xx_devused&=~(1<name, 29, "em28xx #%d", nr); dev->devno = nr; dev->model = id->driver_info; /* compute alternate max packet sizes */ uif = udev->actconfig->interface[0]; dev->num_alt=uif->num_altsetting; em28xx_info("Alternate settings: %i\n",dev->num_alt); // dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)* dev->alt_max_pkt_size = kmalloc(32* dev->num_alt,GFP_KERNEL); if (dev->alt_max_pkt_size == NULL) { em28xx_errdev("out of memory!\n"); em28xx_devused&=~(1<num_alt ; i++) { u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc. wMaxPacketSize); dev->alt_max_pkt_size[i] = (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1); em28xx_info("Alternate setting %i, max size= %i\n",i, dev->alt_max_pkt_size[i]); } if ((card[nr]>=0)&&(card[nr]model = card[nr]; /* allocate device struct */ retval = em28xx_init_dev(&dev, udev, nr); if (retval) return retval; em28xx_info("Found %s\n", em28xx_boards[dev->model].name); /* save our data pointer in this interface device */ usb_set_intfdata(interface, dev); return 0; } /* * em28xx_usb_disconnect() * called when the device gets diconencted * video device will be unregistered on v4l2_close in case it is still open */ static void em28xx_usb_disconnect(struct usb_interface *interface) { struct em28xx *dev = usb_get_intfdata(interface); usb_set_intfdata(interface, NULL); if (!dev) return; down_write(&em28xx_disconnect); mutex_lock(&dev->lock); em28xx_info("disconnecting %s\n", dev->vdev->name); wake_up_interruptible_all(&dev->open); if (dev->users) { em28xx_warn ("device /dev/video%d is open! Deregistration and memory " "deallocation are deferred on close.\n", dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN); dev->state |= DEV_MISCONFIGURED; em28xx_uninit_isoc(dev); dev->state |= DEV_DISCONNECTED; wake_up_interruptible(&dev->wait_frame); wake_up_interruptible(&dev->wait_stream); } else { dev->state |= DEV_DISCONNECTED; em28xx_release_resources(dev); } mutex_unlock(&dev->lock); if (!dev->users) { kfree(dev->alt_max_pkt_size); kfree(dev); } up_write(&em28xx_disconnect); } static struct usb_driver em28xx_usb_driver = { .name = "em28xx", .probe = em28xx_usb_probe, .disconnect = em28xx_usb_disconnect, .id_table = em28xx_id_table, }; static int __init em28xx_module_init(void) { int result; printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n", (EM28XX_VERSION_CODE >> 16) & 0xff, (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff); #ifdef SNAPSHOT printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n", SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100); #endif /* register this driver with the USB subsystem */ result = usb_register(&em28xx_usb_driver); if (result) em28xx_err(DRIVER_NAME " usb_register failed. Error number %d.\n", result); return result; } static void __exit em28xx_module_exit(void) { /* deregister this driver with the USB subsystem */ usb_deregister(&em28xx_usb_driver); } module_init(em28xx_module_init); module_exit(em28xx_module_exit);