/* em2820-video.c - driver for Empia EM2820/2840 USB video capture devices Copyright (C) 2005 Markus Rechberger Ludovico Cavedon Mauro Carvalho Chehab Based on the em2800 driver from Sascha Sommer 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 "em2820.h" #define DRIVER_AUTHOR "Markus Rechberger , " \ "Ludovico Cavedon , " \ "Mauro Carvalho Chehab " #define DRIVER_NAME "em2820" #define DRIVER_DESC "Empia em2820 based USB video device driver" #define EM2820_VERSION_CODE KERNEL_VERSION(0, 0, 1) #define em2820_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 int tuner = -1; module_param(tuner, int, 0444); MODULE_PARM_DESC(tuner, "tuner type"); static unsigned int video_debug = 0; module_param(video_debug,int,0644); MODULE_PARM_DESC(video_debug,"enable debug messages [video]"); /* supported tv norms */ static struct em2820_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 */ static struct v4l2_queryctrl em2820_qctrl[] = { { .id = V4L2_CID_BRIGHTNESS, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Brightness", .minimum = -128, .maximum = 127, .step = 1, .default_value = 0, .flags = 0, },{ .id = V4L2_CID_CONTRAST, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Contrast", .minimum = 0x0, .maximum = 0x1f, .step = 0x1, .default_value = 0x10, .flags = 0, },{ .id = V4L2_CID_SATURATION, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Saturation", .minimum = 0x0, .maximum = 0x1f, .step = 0x1, .default_value = 0x10, .flags = 0, },{ .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, },{ .id = V4L2_CID_RED_BALANCE, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Red chroma balance", .minimum = -128, .maximum = 127, .step = 1, .default_value = 0, .flags = 0, },{ .id = V4L2_CID_BLUE_BALANCE, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Blue chroma balance", .minimum = -128, .maximum = 127, .step = 1, .default_value = 0, .flags = 0, },{ .id = V4L2_CID_GAMMA, .type = V4L2_CTRL_TYPE_INTEGER, .name = "Gamma", .minimum = 0x0, .maximum = 0x3f, .step = 0x1, .default_value = 0x20, .flags = 0, } }; static struct usb_driver em2820_usb_driver; static DECLARE_MUTEX(em2820_sysfs_lock); static DECLARE_RWSEM(em2820_disconnect); /********************* v4l2 interface ******************************************/ 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); ret = __pa(kva); return ret; } /* * em2820_config() * inits registers with sane defaults */ static int em2820_config(struct em2820 *dev) { /* Sets I2C speed to 100 KHz */ em2820_write_regs_req(dev, 0x00, 0x06, "\x40", 1); /* enable vbi capturing */ em2820_audio_usb_mute(dev, 1); dev->mute = 1; /* maybe not the right place... */ dev->volume = 0x1f; em2820_audio_analog_set(dev); em2820_audio_analog_setup(dev); em2820_outfmt_set_yuv422(dev); em2820_colorlevels_set_default(dev); em2820_compression_disable(dev); return 0; } /* * em2820_config_i2c() * configure i2c attached devices */ void em2820_config_i2c(struct em2820 *dev) { struct v4l2_frequency f; struct video_decoder_init em2820_vdi = {.data = NULL }; /* configure decoder */ em2820_i2c_call_clients(dev, DECODER_INIT, &em2820_vdi); em2820_i2c_call_clients(dev, DECODER_SET_INPUT, &dev->ctl_input); /* em2820_i2c_call_clients(dev,DECODER_SET_PICTURE, &dev->vpic); */ /* em2820_i2c_call_clients(dev,DECODER_SET_NORM,&dev->tvnorm->id); */ /* em2820_i2c_call_clients(dev,DECODER_ENABLE_OUTPUT,&output); */ /* em2820_i2c_call_clients(dev,DECODER_DUMP, NULL); */ /* configure tuner */ f.tuner = 0; f.type = V4L2_TUNER_ANALOG_TV; f.frequency = 9076; /* FIXME:remove magic number */ dev->ctl_freq = f.frequency; em2820_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f); /* configure tda9887 */ /* em2820_i2c_call_clients(dev,VIDIOC_S_STD,&dev->tvnorm->id); */ } /* * em2820_empty_framequeues() * prepare queues for incoming and outgoing frames */ static void em2820_empty_framequeues(struct em2820 *dev) { u32 i; INIT_LIST_HEAD(&dev->inqueue); INIT_LIST_HEAD(&dev->outqueue); for (i = 0; i < EM2820_NUM_FRAMES; i++) { dev->frame[i].state = F_UNUSED; dev->frame[i].buf.bytesused = 0; } } /* * em2820_v4l2_open() * inits the device and starts isoc transfer */ static int em2820_v4l2_open(struct inode *inode, struct file *filp) { struct video_device *vdev = video_devdata(filp); int minor = iminor(inode); struct em2820 *dev = (struct em2820 *)video_get_drvdata(vdev); int errCode = 0; em2820_videodbg("users=%d", dev->users); if (!down_read_trylock(&em2820_disconnect)) return -ERESTARTSYS; if (dev->users) { em2820_warn("this driver can be opened only once\n"); up_read(&em2820_disconnect); return -EBUSY; } /* if(dev->vbi_dev->minor == minor){ dev->type=V4L2_BUF_TYPE_VBI_CAPTURE; }*/ if (dev->vdev->minor == minor) { dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; } init_MUTEX(&dev->fileop_lock); /* to 1 == available */ spin_lock_init(&dev->queue_lock); init_waitqueue_head(&dev->wait_frame); init_waitqueue_head(&dev->wait_stream); down(&dev->lock); em2820_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; em2820_capture_start(dev, 1); em2820_resolution_set(dev); /* start the transfer */ errCode = em2820_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 */ em2820_empty_framequeues(dev); dev->state |= DEV_INITIALIZED; err: up(&dev->lock); up_read(&em2820_disconnect); return errCode; } /* * em2820_realease_resources() * unregisters the v4l2,i2c and usb devices * called when the device gets disconected or at module unload */ static void em2820_release_resources(struct em2820 *dev) { down(&em2820_sysfs_lock); em2820_info("V4L2 device /dev/video%d deregistered\n", dev->vdev->minor); video_set_drvdata(dev->vdev, NULL); video_unregister_device(dev->vdev); /* video_unregister_device(dev->vbi_dev); */ em2820_i2c_unregister(dev); usb_put_dev(dev->udev); up(&em2820_sysfs_lock); } /* * em2820_v4l2_close() * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls */ static int em2820_v4l2_close(struct inode *inode, struct file *file) { struct video_device *vdev = video_devdata(file); struct em2820 *dev = (struct em2820 *)video_get_drvdata(vdev); int errCode; em2820_videodbg("users=%d", dev->users); down(&dev->lock); em2820_uninit_isoc(dev); em2820_release_buffers(dev); /* the device is already disconnect, free the remaining resources */ if (dev->state & DEV_DISCONNECTED) { em2820_release_resources(dev); up(&dev->lock); kfree(dev); return 0; } /* set alternate 0 */ dev->alt = 0; em2820_videodbg("setting alternate 0"); errCode = usb_set_interface(dev->udev, 0, 0); if (errCode < 0) { em2820_errdev ("cannot change alternate number to 0 (error=%i)\n", errCode); } dev->users--; wake_up_interruptible_nr(&dev->open, 1); up(&dev->lock); return 0; } /* * em2820_v4l2_read() * will allocate buffers when called for the first time */ static ssize_t em2820_v4l2_read(struct file *filp, char __user * buf, size_t count, loff_t * f_pos) { struct em2820 *dev = video_get_drvdata(video_devdata(filp)); struct em2820_frame_t *f, *i; unsigned long lock_flags; int ret = 0; if (down_interruptible(&dev->fileop_lock)) return -ERESTARTSYS; if (dev->state & DEV_DISCONNECTED) { em2820_videodbg("device not present"); up(&dev->fileop_lock); return -ENODEV; } if (dev->state & DEV_MISCONFIGURED) { em2820_videodbg("device misconfigured; close and open it again"); up(&dev->fileop_lock); return -EIO; } if (dev->io == IO_MMAP) { em2820_videodbg ("IO method is set to mmap; close and open" " the device again to choose the read method"); up(&dev->fileop_lock); return -EINVAL; } if (dev->io == IO_NONE) { if (!em2820_request_buffers(dev, EM2820_NUM_READ_FRAMES)) { em2820_errdev("read failed, not enough memory\n"); up(&dev->fileop_lock); return -ENOMEM; } dev->io = IO_READ; dev->stream = STREAM_ON; em2820_queue_unusedframes(dev); } if (!count) { up(&dev->fileop_lock); return 0; } if (list_empty(&dev->outqueue)) { if (filp->f_flags & O_NONBLOCK) { up(&dev->fileop_lock); return -EAGAIN; } ret = wait_event_interruptible (dev->wait_frame, (!list_empty(&dev->outqueue)) || (dev->state & DEV_DISCONNECTED)); if (ret) { up(&dev->fileop_lock); return ret; } if (dev->state & DEV_DISCONNECTED) { up(&dev->fileop_lock); return -ENODEV; } } f = list_entry(dev->outqueue.prev, struct em2820_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); em2820_queue_unusedframes(dev); if (count > f->buf.length) count = f->buf.length; if (copy_to_user(buf, f->bufmem, count)) { up(&dev->fileop_lock); return -EFAULT; } *f_pos += count; up(&dev->fileop_lock); return count; } /* * em2820_v4l2_poll() * will allocate buffers when called for the first time */ static unsigned int em2820_v4l2_poll(struct file *filp, poll_table * wait) { struct em2820 *dev = video_get_drvdata(video_devdata(filp)); unsigned int mask = 0; if (down_interruptible(&dev->fileop_lock)) return POLLERR; if (dev->state & DEV_DISCONNECTED) { em2820_videodbg("device not present"); } else if (dev->state & DEV_MISCONFIGURED) { em2820_videodbg("device is misconfigured; close and open it again"); } else { if (dev->io == IO_NONE) { if (!em2820_request_buffers (dev, EM2820_NUM_READ_FRAMES)) { em2820_warn ("poll() failed, not enough memory\n"); } else { dev->io = IO_READ; dev->stream = STREAM_ON; } } if (dev->io == IO_READ) { em2820_queue_unusedframes(dev); poll_wait(filp, &dev->wait_frame, wait); if (!list_empty(&dev->outqueue)) mask |= POLLIN | POLLRDNORM; up(&dev->fileop_lock); return mask; } } up(&dev->fileop_lock); return POLLERR; } /* * em2820_vm_open() */ static void em2820_vm_open(struct vm_area_struct *vma) { struct em2820_frame_t *f = vma->vm_private_data; f->vma_use_count++; } /* * em2820_vm_close() */ static void em2820_vm_close(struct vm_area_struct *vma) { /* NOTE: buffers are not freed here */ struct em2820_frame_t *f = vma->vm_private_data; f->vma_use_count--; } static struct vm_operations_struct em2820_vm_ops = { .open = em2820_vm_open, .close = em2820_vm_close, }; /* * em2820_v4l2_mmap() */ static int em2820_v4l2_mmap(struct file *filp, struct vm_area_struct *vma) { struct em2820 *dev = video_get_drvdata(video_devdata(filp)); unsigned long size = vma->vm_end - vma->vm_start, start = vma->vm_start, pos, page; u32 i; if (down_interruptible(&dev->fileop_lock)) return -ERESTARTSYS; if (dev->state & DEV_DISCONNECTED) { em2820_videodbg("mmap: device not present"); up(&dev->fileop_lock); return -ENODEV; } if (dev->state & DEV_MISCONFIGURED) { em2820_videodbg ("mmap: Device is misconfigured; close and " "open it again"); up(&dev->fileop_lock); return -EIO; } if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) || size != PAGE_ALIGN(dev->frame[0].buf.length)) { up(&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) { em2820_videodbg("mmap: user supplied mapping address is out of range"); up(&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 = (unsigned long)dev->frame[i].bufmem; while (size > 0) { /* size is page-aligned */ page = vmalloc_to_pfn((void *)pos); if (remap_pfn_range(vma, start, page, PAGE_SIZE, vma->vm_page_prot)) { em2820_videodbg("mmap: rename page map failed"); up(&dev->fileop_lock); return -EAGAIN; } start += PAGE_SIZE; pos += PAGE_SIZE; size -= PAGE_SIZE; } vma->vm_ops = &em2820_vm_ops; vma->vm_private_data = &dev->frame[i]; em2820_vm_open(vma); up(&dev->fileop_lock); return 0; } /* * em2820_get_ctrl() * return the current saturation, brightness or contrast, mute state */ static int em2820_get_ctrl(struct em2820 *dev, struct v4l2_control *ctrl) { s32 tmp; 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; case V4L2_CID_BRIGHTNESS: if ((tmp = em2820_brightness_get(dev)) < 0) return -EIO; ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */ return 0; case V4L2_CID_CONTRAST: if ((ctrl->value = em2820_contrast_get(dev)) < 0) return -EIO; return 0; case V4L2_CID_SATURATION: if ((ctrl->value = em2820_saturation_get(dev)) < 0) return -EIO; return 0; case V4L2_CID_RED_BALANCE: if ((tmp = em2820_v_balance_get(dev)) < 0) return -EIO; ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */ return 0; case V4L2_CID_BLUE_BALANCE: if ((tmp = em2820_u_balance_get(dev)) < 0) return -EIO; ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */ return 0; case V4L2_CID_GAMMA: if ((ctrl->value = em2820_gamma_get(dev)) < 0) return -EIO; return 0; default: return -EINVAL; } } /* * em2820_set_ctrl() * mute or set new saturation, brightness or contrast */ static int em2820_set_ctrl(struct em2820 *dev, const struct v4l2_control *ctrl) { switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: if (ctrl->value != dev->mute) { dev->mute = ctrl->value; em2820_audio_usb_mute(dev, ctrl->value); return em2820_audio_analog_set(dev); } return 0; case V4L2_CID_AUDIO_VOLUME: dev->volume = ctrl->value; return em2820_audio_analog_set(dev); case V4L2_CID_BRIGHTNESS: return em2820_brightness_set(dev, ctrl->value); case V4L2_CID_CONTRAST: return em2820_contrast_set(dev, ctrl->value); case V4L2_CID_SATURATION: return em2820_saturation_set(dev, ctrl->value); case V4L2_CID_RED_BALANCE: return em2820_v_balance_set(dev, ctrl->value); case V4L2_CID_BLUE_BALANCE: return em2820_u_balance_set(dev, ctrl->value); case V4L2_CID_GAMMA: return em2820_gamma_set(dev, ctrl->value); default: return -EINVAL; } } /* * em2820_stream_interrupt() * stops streaming */ static int em2820_stream_interrupt(struct em2820 *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), EM2820_URB_TIMEOUT); if (dev->state & DEV_DISCONNECTED) return -ENODEV; else if (ret) { dev->state |= DEV_MISCONFIGURED; em2820_videodbg("device is misconfigured; close and " "open /dev/video%d again", dev->vdev->minor); return ret; } return 0; } static int em2820_set_norm(struct em2820 *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; em2820_resolution_set(dev); return 0; } static void video_mux(struct em2820 *dev, int index) { int input, ainput; input = INPUT(index)->vmux; dev->ctl_input = index; em2820_i2c_call_clients(dev, DECODER_SET_INPUT, &input); dev->ctl_ainput = INPUT(index)->amux; switch (dev->ctl_ainput) { case 0: ainput = EM2820_AUDIO_SRC_TUNER; break; default: ainput = EM2820_AUDIO_SRC_LINE; } em2820_audio_source(dev, ainput); } /* * em2820_v4l2_do_ioctl() * This function is _not_ called directly, but from * em2820_v4l2_ioctl. Userspace * copying is done already, arg is a kernel pointer. */ static int em2820_do_ioctl(struct inode *inode, struct file *filp, struct em2820 *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; down(&dev->lock); dev->tvnorm = &tvnorms[i]; em2820_set_norm(dev, dev->width, dev->height); /* 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; dev->bytesperline=dev->width*2; dev->hscale=0; dev->vscale=0; em2820_resolution_set(dev); */ /* em2820_uninit_isoc(dev); em2820_set_alternate(dev); em2820_capture_start(dev, 1); em2820_resolution_set(dev); em2820_init_isoc(dev); */ em2820_i2c_call_clients(dev, DECODER_SET_NORM, &tvnorms[i].mode); em2820_i2c_call_clients(dev, VIDIOC_S_STD, &dev->tvnorm->id); up(&dev->lock); return 0; } /* ------ input switching ---------- */ case VIDIOC_ENUMINPUT: { struct v4l2_input *i = arg; unsigned int n; static const char *iname[] = { [EM2820_VMUX_COMPOSITE1] = "Composite1", [EM2820_VMUX_COMPOSITE2] = "Composite2", [EM2820_VMUX_COMPOSITE3] = "Composite3", [EM2820_VMUX_COMPOSITE4] = "Composite4", [EM2820_VMUX_SVIDEO] = "S-Video", [EM2820_VMUX_TELEVISION] = "Television", [EM2820_VMUX_CABLE] = "Cable TV", [EM2820_VMUX_DVB] = "DVB", [EM2820_VMUX_DEBUG] = "for debug only", }; n = i->index; if (n >= MAX_EM2820_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 ((EM2820_VMUX_TELEVISION == INPUT(n)->type) || (EM2820_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_EM2820_INPUT) return -EINVAL; if (0 == INPUT(*index)->type) return -EINVAL; down(&dev->lock); video_mux(dev, *index); up(&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; u8 i, n; n = sizeof(em2820_qctrl) / sizeof(em2820_qctrl[0]); for (i = 0; i < n; i++) if (qc->id && qc->id == em2820_qctrl[i].id) { memcpy(qc, &(em2820_qctrl[i]), sizeof(*qc)); return 0; } return -EINVAL; } case VIDIOC_G_CTRL: { struct v4l2_control *ctrl = arg; return em2820_get_ctrl(dev, ctrl); } case VIDIOC_S_CTRL_OLD: /* ??? */ case VIDIOC_S_CTRL: { struct v4l2_control *ctrl = arg; u8 i, n; n = sizeof(em2820_qctrl) / sizeof(em2820_qctrl[0]); for (i = 0; i < n; i++) if (ctrl->id == em2820_qctrl[i].id) { if (ctrl->value < em2820_qctrl[i].minimum || ctrl->value > em2820_qctrl[i].maximum) return -ERANGE; return em2820_set_ctrl(dev, ctrl); } return -EINVAL; } /* --- tuner ioctls ------------------------------------------ */ case VIDIOC_G_TUNER: { struct v4l2_tuner *t = arg; int status = 0; if (0 != t->index) return -EINVAL; memset(t, 0, sizeof(*t)); strcpy(t->name, "Tuner"); t->type = V4L2_TUNER_ANALOG_TV; t->capability = V4L2_TUNER_CAP_NORM; t->rangehigh = 0xffffffffUL; /* FIXME: set correct range */ /* t->signal = 0xffff;*/ /* em2820_i2c_call_clients(dev,VIDIOC_G_TUNER,t);*/ /* No way to get signal strength? */ down(&dev->lock); em2820_i2c_call_clients(dev, DECODER_GET_STATUS, &status); up(&dev->lock); t->signal = (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0; em2820_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x", t->signal, t->afc); return 0; } case VIDIOC_S_TUNER: { struct v4l2_tuner *t = arg; int status = 0; if (0 != t->index) return -EINVAL; memset(t, 0, sizeof(*t)); strcpy(t->name, "Tuner"); t->type = V4L2_TUNER_ANALOG_TV; t->capability = V4L2_TUNER_CAP_NORM; t->rangehigh = 0xffffffffUL; /* FIXME: set correct range */ /* t->signal = 0xffff; */ /* No way to get signal strength? */ down(&dev->lock); em2820_i2c_call_clients(dev, DECODER_GET_STATUS, &status); up(&dev->lock); t->signal = (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0; em2820_videodbg("VIDIO_S_TUNER: signal=%x, afc=%x\n", t->signal, t->afc); 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; down(&dev->lock); dev->ctl_freq = f->frequency; em2820_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f); up(&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? */ em2820_videodbg("VIDIOC_STREAMON: starting stream"); 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) { em2820_videodbg ("VIDIOC_STREAMOFF: interrupting stream"); if ((ret = em2820_stream_interrupt(dev))) return ret; } em2820_empty_framequeues(dev); return 0; } default: return v4l_compat_translate_ioctl(inode, filp, cmd, arg, driver_ioctl); } return 0; } /* * em2820_v4l2_do_ioctl() * This function is _not_ called directly, but from * em2820_v4l2_ioctl. Userspace * copying is done already, arg is a kernel pointer. */ static int em2820_video_do_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, void *arg) { struct em2820 *dev = filp->private_data; if (!dev) return -ENODEV; if (video_debug > 1) em2820_print_ioctl(dev->name,cmd); switch (cmd) { /* --- capabilities ------------------------------------------ */ case VIDIOC_QUERYCAP: { struct v4l2_capability *cap = arg; memset(cap, 0, sizeof(*cap)); strlcpy(cap->driver, "em2820", sizeof(cap->driver)); strlcpy(cap->card, em2820_boards[dev->model].name, sizeof(cap->card)); strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info)); cap->version = EM2820_VERSION_CODE; cap->capabilities = 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: { struct v4l2_format *format = arg; em2820_videodbg("VIDIOC_G_FMT: type=%s", 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_VIDEO_CAPTURE) return -EINVAL; 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? */ em2820_videodbg("VIDIOC_G_FMT: %dx%d", dev->width, dev->height); return 0; } case VIDIOC_TRY_FMT: case VIDIOC_S_FMT: { struct v4l2_format *format = arg; 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); /* int both_fields; */ em2820_videodbg("%s: type=%s", 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_VIDEO_CAPTURE) return -EINVAL; em2820_videodbg("%s: requested %dx%d", 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 ((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; em2820_videodbg("%s: returned %dx%d (%d, %d)", 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) { em2820_videodbg("VIDIOC_S_FMT failed. " "Unmap the buffers first."); return -EINVAL; } /* stop io in case it is already in progress */ if (dev->stream == STREAM_ON) { em2820_videodbg("VIDIOC_SET_FMT: interupting stream"); if ((ret = em2820_stream_interrupt(dev))) return ret; } em2820_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; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */ dev->bytesperline = dev->width * 2; dev->hscale = hscale; dev->vscale = vscale; /* dev->both_fileds = both_fileds; */ em2820_uninit_isoc(dev); em2820_set_alternate(dev); em2820_capture_start(dev, 1); em2820_resolution_set(dev); em2820_init_isoc(dev); return 0; } /* --- streaming capture ------------------------------------- */ 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) { em2820_videodbg ("method is set to read;" " close and open the device again to" " choose the mmap I/O method"); return -EINVAL; } for (i = 0; i < dev->num_frames; i++) if (dev->frame[i].vma_use_count) { em2820_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped"); return -EINVAL; } if (dev->stream == STREAM_ON) { em2820_videodbg("VIDIOC_REQBUFS: interrupting stream"); if ((ret = em2820_stream_interrupt(dev))) return ret; } em2820_empty_framequeues(dev); em2820_release_buffers(dev); if (rb->count) rb->count = em2820_request_buffers(dev, rb->count); dev->frame_current = NULL; em2820_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i", 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 em2820_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 em2820_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 em2820_do_ioctl(inode, filp, dev, cmd, arg, em2820_video_do_ioctl); } return 0; } /* * em2820_v4l2_ioctl() * handle v4l2 ioctl the main action happens in em2820_v4l2_do_ioctl() */ static int em2820_v4l2_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg) { struct em2820 *dev = video_get_drvdata(video_devdata(filp)); int ret = 0; if (down_interruptible(&dev->fileop_lock)) return -ERESTARTSYS; if (dev->state & DEV_DISCONNECTED) { em2820_errdev("v4l2 ioctl: device not present\n"); up(&dev->fileop_lock); return -ENODEV; } if (dev->state & DEV_MISCONFIGURED) { em2820_errdev ("v4l2 ioctl: device is misconfigured; close and open it again\n"); up(&dev->fileop_lock); return -EIO; } ret = video_usercopy(inode, filp, cmd, arg, em2820_video_do_ioctl); up(&dev->fileop_lock); return ret; } static struct file_operations em2820_v4l_fops = { .owner = THIS_MODULE, .open = em2820_v4l2_open, .release = em2820_v4l2_close, .ioctl = em2820_v4l2_ioctl, .read = em2820_v4l2_read, .poll = em2820_v4l2_poll, .mmap = em2820_v4l2_mmap, .llseek = no_llseek, }; /******************************** usb interface *****************************************/ /* * em2820_init_dev() * allocates and inits the device structs, registers i2c bus and v4l device */ static int em2820_init_dev(struct em2820 **devhandle, struct usb_device *udev, int minor, int model) { struct em2820 *dev; int retval = -ENOMEM; int errCode, i; unsigned int maxh, maxw; struct usb_interface *uif; /* allocate memory for our device state and initialize it */ dev = kmalloc(sizeof(*dev), GFP_KERNEL); if (dev == NULL) { em2820_err(DRIVER_NAME ": out of memory!\n"); return -ENOMEM; } memset(dev, 0x00, sizeof(*dev)); snprintf(dev->name, 29, "em2820 #%d", minor); dev->udev = udev; dev->model = model; init_MUTEX(&dev->lock); init_waitqueue_head(&dev->open); dev->em2820_write_regs = em2820_write_regs; dev->em2820_read_reg = em2820_read_reg; dev->em2820_read_reg_req_len = em2820_read_reg_req_len; dev->em2820_write_regs_req = em2820_write_regs_req; dev->em2820_read_reg_req = em2820_read_reg_req; dev->has_tuner = em2820_boards[model].has_tuner; dev->has_msp34xx = em2820_boards[model].has_msp34xx; dev->tda9887_conf = em2820_boards[model].tda9887_conf; dev->decoder = em2820_boards[model].decoder; if (tuner >= 0) dev->tuner_type = tuner; else dev->tuner_type = em2820_boards[model].tuner_type; dev->video_inputs = em2820_boards[model].vchannels; for (i = 0; i < TVNORMS; i++) if (em2820_boards[model].norm == tvnorms[i].mode) break; if (i == TVNORMS) i = 0; dev->tvnorm = &tvnorms[i]; /* set default norm */ em2820_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 = EM2820_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; /* 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; /* compute alternate max packet sizes */ uif = dev->udev->actconfig->interface[0]; dev->alt_max_pkt_size[0] = 0; for (i = 1; i <= EM2820_MAX_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); } #ifdef CONFIG_MODULES /* request some modules */ if (dev->decoder == EM2820_SAA7113) request_module("saa7113"); if (dev->decoder == EM2820_SAA7114) request_module("saa7114"); if (dev->decoder == EM2820_TVP5150) request_module("tvp5150"); if (dev->has_tuner) request_module("tuner"); if (dev->tda9887_conf) request_module("tda9887"); #endif errCode = em2820_config(dev); if (errCode) { em2820_errdev("error configuring device\n"); kfree(dev); return -ENOMEM; } down(&dev->lock); /* register i2c bus */ em2820_i2c_register(dev); /* Do board specific init and eeprom reading */ em2820_card_setup(dev); /* configure the device */ em2820_config_i2c(dev); up(&dev->lock); errCode = em2820_config(dev); #ifdef CONFIG_MODULES if (dev->has_msp34xx) request_module("msp3400"); #endif /* allocate and fill v4l2 device struct */ dev->vdev = video_device_alloc(); if (NULL == dev->vdev) { em2820_errdev("cannot allocate video_device.\n"); kfree(dev); return -ENOMEM; } dev->vdev->owner = THIS_MODULE; dev->vdev->type = VID_TYPE_CAPTURE; if (dev->has_tuner) dev->vdev->type |= VID_TYPE_TUNER; dev->vdev->hardware = 0; dev->vdev->fops = &em2820_v4l_fops; dev->vdev->minor = -1; dev->vdev->dev = &dev->udev->dev; dev->vdev->release = video_device_release; snprintf(dev->vdev->name, sizeof(dev->vdev->name), "%s", "em2820 video"); video_set_drvdata(dev->vdev, dev); /* register v4l2 device */ down(&dev->lock); if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER, -1))) { em2820_errdev("unable to register video device (error=%i).\n", retval); up(&dev->lock); video_set_drvdata(dev->vdev, NULL); video_device_release(dev->vdev); kfree(dev); return -ENODEV; } if (dev->has_msp34xx) { /* Send a reset to other chips via gpio */ em2820_write_regs_req(dev, 0x00, 0x08, "\xf7", 1); udelay(2500); em2820_write_regs_req(dev, 0x00, 0x08, "\xff", 1); udelay(2500); } video_mux(dev, 0); up(&dev->lock); em2820_info("V4L2 device registered as /dev/video%d\n", dev->vdev->minor); *devhandle = dev; return 0; } /* * em2820_usb_probe() * checks for supported devices */ static int em2820_usb_probe(struct usb_interface *interface, const struct usb_device_id *id) { const struct usb_endpoint_descriptor *endpoint; struct usb_device *udev; struct em2820 *dev = NULL; int retval = -ENODEV; udev = usb_get_dev(interface_to_usbdev(interface)); endpoint = &interface->cur_altsetting->endpoint[1].desc; /* check if the the device has the iso in endpoint at the correct place */ if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC) { /* em2820_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n"); */ return -ENODEV; } if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) { /* em2820_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n"); */ return -ENODEV; } /* allocate device struct */ retval = em2820_init_dev(&dev, udev, interface->minor, id->driver_info); if (retval) return retval; em2820_info("Found %s\n", em2820_boards[id->driver_info].name); /* save our data pointer in this interface device */ usb_set_intfdata(interface, dev); return 0; } /* * em2820_usb_disconnect() * called when the device gets diconencted * video device will be unregistered on v4l2_close in case it is still open */ static void em2820_usb_disconnect(struct usb_interface *interface) { struct em2820 *dev = usb_get_intfdata(interface); usb_set_intfdata(interface, NULL); if (!dev) return; down_write(&em2820_disconnect); down(&dev->lock); em2820_info("disconnecting %s\n", dev->vdev->name); wake_up_interruptible_all(&dev->open); if (dev->users) { em2820_warn ("device /dev/video%d is open! Deregistration and memory " "deallocation are deferred on close.\n", dev->vdev->minor); dev->state |= DEV_MISCONFIGURED; em2820_uninit_isoc(dev); dev->state |= DEV_DISCONNECTED; wake_up_interruptible(&dev->wait_frame); wake_up_interruptible(&dev->wait_stream); } else { dev->state |= DEV_DISCONNECTED; em2820_release_resources(dev); } up(&dev->lock); if (!dev->users) kfree(dev); up_write(&em2820_disconnect); } static struct usb_driver em2820_usb_driver = { .owner = THIS_MODULE, .name = "em2820", .probe = em2820_usb_probe, .disconnect = em2820_usb_disconnect, .id_table = em2820_id_table, }; static int __init em2820_module_init(void) { int result; printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n", (EM2820_VERSION_CODE >> 16) & 0xff, (EM2820_VERSION_CODE >> 8) & 0xff, EM2820_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(&em2820_usb_driver); if (result) em2820_err(DRIVER_NAME " usb_register failed. Error number %d.\n", result); return result; } static void __exit em2820_module_exit(void) { /* deregister this driver with the USB subsystem */ usb_deregister(&em2820_usb_driver); } module_init(em2820_module_init); module_exit(em2820_module_exit);