diff options
| -rw-r--r-- | drivers/media/video/uvc/uvc_ctrl.c | 82 | ||||
| -rw-r--r-- | drivers/media/video/uvc/uvc_driver.c | 466 | ||||
| -rw-r--r-- | drivers/media/video/uvc/uvc_v4l2.c | 80 | ||||
| -rw-r--r-- | drivers/media/video/uvc/uvc_video.c | 2 | ||||
| -rw-r--r-- | drivers/media/video/uvc/uvcvideo.h | 59 |
5 files changed, 411 insertions, 278 deletions
diff --git a/drivers/media/video/uvc/uvc_ctrl.c b/drivers/media/video/uvc/uvc_ctrl.c index 70043b1704f..c3225a56174 100644 --- a/drivers/media/video/uvc/uvc_ctrl.c +++ b/drivers/media/video/uvc/uvc_ctrl.c @@ -729,7 +729,7 @@ static void __uvc_find_control(struct uvc_entity *entity, __u32 v4l2_id, } } -struct uvc_control *uvc_find_control(struct uvc_video_device *video, +struct uvc_control *uvc_find_control(struct uvc_video_chain *chain, __u32 v4l2_id, struct uvc_control_mapping **mapping) { struct uvc_control *ctrl = NULL; @@ -742,17 +742,17 @@ struct uvc_control *uvc_find_control(struct uvc_video_device *video, v4l2_id &= V4L2_CTRL_ID_MASK; /* Find the control. */ - __uvc_find_control(video->processing, v4l2_id, mapping, &ctrl, next); + __uvc_find_control(chain->processing, v4l2_id, mapping, &ctrl, next); if (ctrl && !next) return ctrl; - list_for_each_entry(entity, &video->iterms, chain) { + list_for_each_entry(entity, &chain->iterms, chain) { __uvc_find_control(entity, v4l2_id, mapping, &ctrl, next); if (ctrl && !next) return ctrl; } - list_for_each_entry(entity, &video->extensions, chain) { + list_for_each_entry(entity, &chain->extensions, chain) { __uvc_find_control(entity, v4l2_id, mapping, &ctrl, next); if (ctrl && !next) return ctrl; @@ -765,7 +765,7 @@ struct uvc_control *uvc_find_control(struct uvc_video_device *video, return ctrl; } -int uvc_query_v4l2_ctrl(struct uvc_video_device *video, +int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, struct v4l2_queryctrl *v4l2_ctrl) { struct uvc_control *ctrl; @@ -775,7 +775,7 @@ int uvc_query_v4l2_ctrl(struct uvc_video_device *video, __u8 *data; int ret; - ctrl = uvc_find_control(video, v4l2_ctrl->id, &mapping); + ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping); if (ctrl == NULL) return -EINVAL; @@ -793,9 +793,9 @@ int uvc_query_v4l2_ctrl(struct uvc_video_device *video, v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; if (ctrl->info->flags & UVC_CONTROL_GET_DEF) { - ret = uvc_query_ctrl(video->dev, UVC_GET_DEF, ctrl->entity->id, - video->dev->intfnum, ctrl->info->selector, data, - ctrl->info->size); + ret = uvc_query_ctrl(chain->dev, UVC_GET_DEF, ctrl->entity->id, + chain->dev->intfnum, ctrl->info->selector, + data, ctrl->info->size); if (ret < 0) goto out; v4l2_ctrl->default_value = @@ -831,25 +831,25 @@ int uvc_query_v4l2_ctrl(struct uvc_video_device *video, } if (ctrl->info->flags & UVC_CONTROL_GET_MIN) { - ret = uvc_query_ctrl(video->dev, UVC_GET_MIN, ctrl->entity->id, - video->dev->intfnum, ctrl->info->selector, data, - ctrl->info->size); + ret = uvc_query_ctrl(chain->dev, UVC_GET_MIN, ctrl->entity->id, + chain->dev->intfnum, ctrl->info->selector, + data, ctrl->info->size); if (ret < 0) goto out; v4l2_ctrl->minimum = mapping->get(mapping, UVC_GET_MIN, data); } if (ctrl->info->flags & UVC_CONTROL_GET_MAX) { - ret = uvc_query_ctrl(video->dev, UVC_GET_MAX, ctrl->entity->id, - video->dev->intfnum, ctrl->info->selector, data, - ctrl->info->size); + ret = uvc_query_ctrl(chain->dev, UVC_GET_MAX, ctrl->entity->id, + chain->dev->intfnum, ctrl->info->selector, + data, ctrl->info->size); if (ret < 0) goto out; v4l2_ctrl->maximum = mapping->get(mapping, UVC_GET_MAX, data); } if (ctrl->info->flags & UVC_CONTROL_GET_RES) { - ret = uvc_query_ctrl(video->dev, UVC_GET_RES, ctrl->entity->id, - video->dev->intfnum, ctrl->info->selector, data, - ctrl->info->size); + ret = uvc_query_ctrl(chain->dev, UVC_GET_RES, ctrl->entity->id, + chain->dev->intfnum, ctrl->info->selector, + data, ctrl->info->size); if (ret < 0) goto out; v4l2_ctrl->step = mapping->get(mapping, UVC_GET_RES, data); @@ -886,9 +886,9 @@ out: * (UVC_CTRL_DATA_BACKUP) for all dirty controls. Both functions release the * control lock. */ -int uvc_ctrl_begin(struct uvc_video_device *video) +int uvc_ctrl_begin(struct uvc_video_chain *chain) { - return mutex_lock_interruptible(&video->ctrl_mutex) ? -ERESTARTSYS : 0; + return mutex_lock_interruptible(&chain->ctrl_mutex) ? -ERESTARTSYS : 0; } static int uvc_ctrl_commit_entity(struct uvc_device *dev, @@ -938,34 +938,34 @@ static int uvc_ctrl_commit_entity(struct uvc_device *dev, return 0; } -int __uvc_ctrl_commit(struct uvc_video_device *video, int rollback) +int __uvc_ctrl_commit(struct uvc_video_chain *chain, int rollback) { struct uvc_entity *entity; int ret = 0; /* Find the control. */ - ret = uvc_ctrl_commit_entity(video->dev, video->processing, rollback); + ret = uvc_ctrl_commit_entity(chain->dev, chain->processing, rollback); if (ret < 0) goto done; - list_for_each_entry(entity, &video->iterms, chain) { - ret = uvc_ctrl_commit_entity(video->dev, entity, rollback); + list_for_each_entry(entity, &chain->iterms, chain) { + ret = uvc_ctrl_commit_entity(chain->dev, entity, rollback); if (ret < 0) goto done; } - list_for_each_entry(entity, &video->extensions, chain) { - ret = uvc_ctrl_commit_entity(video->dev, entity, rollback); + list_for_each_entry(entity, &chain->extensions, chain) { + ret = uvc_ctrl_commit_entity(chain->dev, entity, rollback); if (ret < 0) goto done; } done: - mutex_unlock(&video->ctrl_mutex); + mutex_unlock(&chain->ctrl_mutex); return ret; } -int uvc_ctrl_get(struct uvc_video_device *video, +int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl) { struct uvc_control *ctrl; @@ -974,13 +974,13 @@ int uvc_ctrl_get(struct uvc_video_device *video, unsigned int i; int ret; - ctrl = uvc_find_control(video, xctrl->id, &mapping); + ctrl = uvc_find_control(chain, xctrl->id, &mapping); if (ctrl == NULL || (ctrl->info->flags & UVC_CONTROL_GET_CUR) == 0) return -EINVAL; if (!ctrl->loaded) { - ret = uvc_query_ctrl(video->dev, UVC_GET_CUR, ctrl->entity->id, - video->dev->intfnum, ctrl->info->selector, + ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, ctrl->entity->id, + chain->dev->intfnum, ctrl->info->selector, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), ctrl->info->size); if (ret < 0) @@ -1005,7 +1005,7 @@ int uvc_ctrl_get(struct uvc_video_device *video, return 0; } -int uvc_ctrl_set(struct uvc_video_device *video, +int uvc_ctrl_set(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl) { struct uvc_control *ctrl; @@ -1013,7 +1013,7 @@ int uvc_ctrl_set(struct uvc_video_device *video, s32 value = xctrl->value; int ret; - ctrl = uvc_find_control(video, xctrl->id, &mapping); + ctrl = uvc_find_control(chain, xctrl->id, &mapping); if (ctrl == NULL || (ctrl->info->flags & UVC_CONTROL_SET_CUR) == 0) return -EINVAL; @@ -1028,8 +1028,8 @@ int uvc_ctrl_set(struct uvc_video_device *video, memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), 0, ctrl->info->size); } else { - ret = uvc_query_ctrl(video->dev, UVC_GET_CUR, - ctrl->entity->id, video->dev->intfnum, + ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, + ctrl->entity->id, chain->dev->intfnum, ctrl->info->selector, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), ctrl->info->size); @@ -1058,7 +1058,7 @@ int uvc_ctrl_set(struct uvc_video_device *video, * Dynamic controls */ -int uvc_xu_ctrl_query(struct uvc_video_device *video, +int uvc_xu_ctrl_query(struct uvc_video_chain *chain, struct uvc_xu_control *xctrl, int set) { struct uvc_entity *entity; @@ -1068,7 +1068,7 @@ int uvc_xu_ctrl_query(struct uvc_video_device *video, int ret; /* Find the extension unit. */ - list_for_each_entry(entity, &video->extensions, chain) { + list_for_each_entry(entity, &chain->extensions, chain) { if (entity->id == xctrl->unit) break; } @@ -1107,7 +1107,7 @@ int uvc_xu_ctrl_query(struct uvc_video_device *video, (!set && !(ctrl->info->flags & UVC_CONTROL_GET_CUR))) return -EINVAL; - if (mutex_lock_interruptible(&video->ctrl_mutex)) + if (mutex_lock_interruptible(&chain->ctrl_mutex)) return -ERESTARTSYS; memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), @@ -1120,8 +1120,8 @@ int uvc_xu_ctrl_query(struct uvc_video_device *video, goto out; } - ret = uvc_query_ctrl(video->dev, set ? UVC_SET_CUR : UVC_GET_CUR, - xctrl->unit, video->dev->intfnum, xctrl->selector, + ret = uvc_query_ctrl(chain->dev, set ? UVC_SET_CUR : UVC_GET_CUR, + xctrl->unit, chain->dev->intfnum, xctrl->selector, data, xctrl->size); if (ret < 0) goto out; @@ -1137,7 +1137,7 @@ out: uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), xctrl->size); - mutex_unlock(&video->ctrl_mutex); + mutex_unlock(&chain->ctrl_mutex); return ret; } diff --git a/drivers/media/video/uvc/uvc_driver.c b/drivers/media/video/uvc/uvc_driver.c index 81bf67126ab..8756be56915 100644 --- a/drivers/media/video/uvc/uvc_driver.c +++ b/drivers/media/video/uvc/uvc_driver.c @@ -276,8 +276,20 @@ static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev, return NULL; } +static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id) +{ + struct uvc_streaming *stream; + + list_for_each_entry(stream, &dev->streams, list) { + if (stream->header.bTerminalLink == id) + return stream; + } + + return NULL; +} + /* ------------------------------------------------------------------------ - * Descriptors handling + * Descriptors parsing */ static int uvc_parse_format(struct uvc_device *dev, @@ -1160,101 +1172,36 @@ next_descriptor: } /* ------------------------------------------------------------------------ - * USB probe and disconnect + * UVC device scan */ /* - * Unregister the video devices. - */ -static void uvc_unregister_video(struct uvc_device *dev) -{ - struct uvc_streaming *streaming; - - list_for_each_entry(streaming, &dev->streams, list) { - if (streaming->vdev == NULL) - continue; - - if (streaming->vdev->minor == -1) - video_device_release(streaming->vdev); - else - video_unregister_device(streaming->vdev); - streaming->vdev = NULL; - } -} - -static int uvc_register_video(struct uvc_device *dev, - struct uvc_streaming *stream) -{ - struct video_device *vdev; - struct uvc_entity *term; - int ret; - - if (uvc_trace_param & UVC_TRACE_PROBE) { - uvc_printk(KERN_INFO, "Found a valid video chain ("); - list_for_each_entry(term, &dev->video.iterms, chain) { - printk("%d", term->id); - if (term->chain.next != &dev->video.iterms) - printk(","); - } - printk(" -> %d).\n", dev->video.oterm->id); - } - - /* Initialize the streaming interface with default streaming - * parameters. - */ - ret = uvc_video_init(stream); - if (ret < 0) { - uvc_printk(KERN_ERR, "Failed to initialize the device " - "(%d).\n", ret); - return ret; - } - - /* Register the device with V4L. */ - vdev = video_device_alloc(); - if (vdev == NULL) - return -1; - - /* We already hold a reference to dev->udev. The video device will be - * unregistered before the reference is released, so we don't need to - * get another one. - */ - vdev->parent = &dev->intf->dev; - vdev->minor = -1; - vdev->fops = &uvc_fops; - vdev->release = video_device_release; - strlcpy(vdev->name, dev->name, sizeof vdev->name); - - /* Set the driver data before calling video_register_device, otherwise - * uvc_v4l2_open might race us. - */ - stream->vdev = vdev; - video_set_drvdata(vdev, stream); - - if (video_register_device(vdev, VFL_TYPE_GRABBER, -1) < 0) { - stream->vdev = NULL; - video_device_release(vdev); - return -1; - } - - return 0; -} - -/* * Scan the UVC descriptors to locate a chain starting at an Output Terminal * and containing the following units: * - * - one Output Terminal (USB Streaming or Display) + * - one or more Output Terminals (USB Streaming or Display) * - zero or one Processing Unit - * - zero, one or mode single-input Selector Units + * - zero, one or more single-input Selector Units * - zero or one multiple-input Selector Units, provided all inputs are * connected to input terminals * - zero, one or mode single-input Extension Units * - one or more Input Terminals (Camera, External or USB Streaming) * - * A side forward scan is made on each detected entity to check for additional - * extension units. + * The terminal and units must match on of the following structures: + * + * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0) + * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ... + * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n) + * + * +---------+ +---------+ -> OTT_*(0) + * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ... + * +---------+ +---------+ -> OTT_*(n) + * + * The Processing Unit and Extension Units can be in any order. Additional + * Extension Units connected to the main chain as single-unit branches are + * also supported. Single-input Selector Units are ignored. */ -static int uvc_scan_chain_entity(struct uvc_video_device *video, +static int uvc_scan_chain_entity(struct uvc_video_chain *chain, struct uvc_entity *entity) { switch (UVC_ENTITY_TYPE(entity)) { @@ -1268,20 +1215,20 @@ static int uvc_scan_chain_entity(struct uvc_video_device *video, return -1; } - list_add_tail(&entity->chain, &video->extensions); + list_add_tail(&entity->chain, &chain->extensions); break; case UVC_VC_PROCESSING_UNIT: if (uvc_trace_param & UVC_TRACE_PROBE) printk(" <- PU %d", entity->id); - if (video->processing != NULL) { + if (chain->processing != NULL) { uvc_trace(UVC_TRACE_DESCR, "Found multiple " "Processing Units in chain.\n"); return -1; } - video->processing = entity; + chain->processing = entity; break; case UVC_VC_SELECTOR_UNIT: @@ -1292,13 +1239,13 @@ static int uvc_scan_chain_entity(struct uvc_video_device *video, if (entity->selector.bNrInPins == 1) break; - if (video->selector != NULL) { + if (chain->selector != NULL) { uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector " "Units in chain.\n"); return -1; } - video->selector = entity; + chain->selector = entity; break; case UVC_ITT_VENDOR_SPECIFIC: @@ -1307,7 +1254,7 @@ static int uvc_scan_chain_entity(struct uvc_video_device *video, if (uvc_trace_param & UVC_TRACE_PROBE) printk(" <- IT %d\n", entity->id); - list_add_tail(&entity->chain, &video->iterms); + list_add_tail(&entity->chain, &chain->iterms); break; case UVC_TT_STREAMING: @@ -1320,14 +1267,7 @@ static int uvc_scan_chain_entity(struct uvc_video_device *video, return -1; } - if (video->sterm != NULL) { - uvc_trace(UVC_TRACE_DESCR, "Found multiple streaming " - "entities in chain.\n"); - return -1; - } - - list_add_tail(&entity->chain, &video->iterms); - video->sterm = entity; + list_add_tail(&entity->chain, &chain->iterms); break; default: @@ -1339,7 +1279,7 @@ static int uvc_scan_chain_entity(struct uvc_video_device *video, return 0; } -static int uvc_scan_chain_forward(struct uvc_video_device *video, +static int uvc_scan_chain_forward(struct uvc_video_chain *chain, struct uvc_entity *entity, struct uvc_entity *prev) { struct uvc_entity *forward; @@ -1350,28 +1290,51 @@ static int uvc_scan_chain_forward(struct uvc_video_device *video, found = 0; while (1) { - forward = uvc_entity_by_reference(video->dev, entity->id, + forward = uvc_entity_by_reference(chain->dev, entity->id, forward); if (forward == NULL) break; - - if (UVC_ENTITY_TYPE(forward) != UVC_VC_EXTENSION_UNIT || - forward == prev) + if (forward == prev) continue; - if (forward->extension.bNrInPins != 1) { - uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has " - "more than 1 input pin.\n", entity->id); - return -1; - } + switch (UVC_ENTITY_TYPE(forward)) { + case UVC_VC_EXTENSION_UNIT: + if (forward->extension.bNrInPins != 1) { + uvc_trace(UVC_TRACE_DESCR, "Extension unit %d " + "has more than 1 input pin.\n", + entity->id); + return -EINVAL; + } + + list_add_tail(&forward->chain, &chain->extensions); + if (uvc_trace_param & UVC_TRACE_PROBE) { + if (!found) + printk(" (->"); + + printk(" XU %d", forward->id); + found = 1; + } + break; + + case UVC_OTT_VENDOR_SPECIFIC: + case UVC_OTT_DISPLAY: + case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: + case UVC_TT_STREAMING: + if (UVC_ENTITY_IS_ITERM(forward)) { + uvc_trace(UVC_TRACE_DESCR, "Unsupported input " + "terminal %u.\n", forward->id); + return -EINVAL; + } - list_add_tail(&forward->chain, &video->extensions); - if (uvc_trace_param & UVC_TRACE_PROBE) { - if (!found) - printk(" (-> XU"); + list_add_tail(&forward->chain, &chain->oterms); + if (uvc_trace_param & UVC_TRACE_PROBE) { + if (!found) + printk(" (->"); - printk(" %d", forward->id); - found = 1; + printk(" OT %d", forward->id); + found = 1; + } + break; } } if (found) @@ -1380,7 +1343,7 @@ static int uvc_scan_chain_forward(struct uvc_video_device *video, return 0; } -static int uvc_scan_chain_backward(struct uvc_video_device *video, +static int uvc_scan_chain_backward(struct uvc_video_chain *chain, struct uvc_entity *entity) { struct uvc_entity *term; @@ -1405,10 +1368,10 @@ static int uvc_scan_chain_backward(struct uvc_video_device *video, if (uvc_trace_param & UVC_TRACE_PROBE) printk(" <- IT"); - video->selector = entity; + chain->selector = entity; for (i = 0; i < entity->selector.bNrInPins; ++i) { id = entity->selector.baSourceID[i]; - term = uvc_entity_by_id(video->dev, id); + term = uvc_entity_by_id(chain->dev, id); if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) { uvc_trace(UVC_TRACE_DESCR, "Selector unit %d " "input %d isn't connected to an " @@ -1419,8 +1382,8 @@ static int uvc_scan_chain_backward(struct uvc_video_device *video, if (uvc_trace_param & UVC_TRACE_PROBE) printk(" %d", term->id); - list_add_tail(&term->chain, &video->iterms); - uvc_scan_chain_forward(video, term, entity); + list_add_tail(&term->chain, &chain->iterms); + uvc_scan_chain_forward(chain, term, entity); } if (uvc_trace_param & UVC_TRACE_PROBE) @@ -1433,100 +1396,129 @@ static int uvc_scan_chain_backward(struct uvc_video_device *video, return id; } -static int uvc_scan_chain(struct uvc_video_device *video) +static int uvc_scan_chain(struct uvc_video_chain *chain, + struct uvc_entity *oterm) { struct uvc_entity *entity, *prev; int id; - entity = video->oterm; + entity = oterm; + list_add_tail(&entity->chain, &chain->oterms); uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain: OT %d", entity->id); - if (UVC_ENTITY_TYPE(entity) == UVC_TT_STREAMING) - video->sterm = entity; - id = entity->output.bSourceID; while (id != 0) { prev = entity; - entity = uvc_entity_by_id(video->dev, id); + entity = uvc_entity_by_id(chain->dev, id); if (entity == NULL) { uvc_trace(UVC_TRACE_DESCR, "Found reference to " "unknown entity %d.\n", id); - return -1; + return -EINVAL; + } + + if (entity->chain.next || entity->chain.prev) { + uvc_trace(UVC_TRACE_DESCR, "Found reference to " + "entity %d already in chain.\n", id); + return -EINVAL; } /* Process entity */ - if (uvc_scan_chain_entity(video, entity) < 0) - return -1; + if (uvc_scan_chain_entity(chain, entity) < 0) + return -EINVAL; /* Forward scan */ - if (uvc_scan_chain_forward(video, entity, prev) < 0) - return -1; + if (uvc_scan_chain_forward(chain, entity, prev) < 0) + return -EINVAL; /* Stop when a terminal is found. */ - if (!UVC_ENTITY_IS_UNIT(entity)) + if (UVC_ENTITY_IS_TERM(entity)) break; /* Backward scan */ - id = uvc_scan_chain_backward(video, entity); + id = uvc_scan_chain_backward(chain, entity); if (id < 0) return id; } - if (video->sterm == NULL) { - uvc_trace(UVC_TRACE_DESCR, "No streaming entity found in " - "chain.\n"); - return -1; + return 0; +} + +static unsigned int uvc_print_terms(struct list_head *terms, char *buffer) +{ + struct uvc_entity *term; + unsigned int nterms = 0; + char *p = buffer; + + list_for_each_entry(term, terms, chain) { + p += sprintf(p, "%u", term->id); + if (term->chain.next != terms) { + p += sprintf(p, ","); + if (++nterms >= 4) { + p += sprintf(p, "..."); + break; + } + } } - return 0; + return p - buffer; +} + +static const char *uvc_print_chain(struct uvc_video_chain *chain) +{ + static char buffer[43]; + char *p = buffer; + + p += uvc_print_terms(&chain->iterms, p); + p += sprintf(p, " -> "); + uvc_print_terms(&chain->oterms, p); + + return buffer; } /* * Scan the device for video chains and register video devices. * - * The driver currently supports a single video device per control interface - * only. The terminal and units must match the following structure: - * - * ITT_* -> VC_PROCESSING_UNIT -> VC_EXTENSION_UNIT{0,n} -> TT_STREAMING - * TT_STREAMING -> VC_PROCESSING_UNIT -> VC_EXTENSION_UNIT{0,n} -> OTT_* - * - * The Extension Units, if present, must have a single input pin. The - * Processing Unit and Extension Units can be in any order. Additional - * Extension Units connected to the main chain as single-unit branches are - * also supported. + * Chains are scanned starting at their output terminals and walked backwards. */ static int uvc_scan_device(struct uvc_device *dev) { + struct uvc_video_chain *chain; struct uvc_entity *term; - int found = 0; - /* Check if the control interface matches the structure we expect. */ list_for_each_entry(term, &dev->entities, list) { - struct uvc_streaming *stream; - - if (!UVC_ENTITY_IS_TERM(term) || !UVC_ENTITY_IS_OTERM(term)) + if (!UVC_ENTITY_IS_OTERM(term)) continue; - memset(&dev->video, 0, sizeof dev->video); - mutex_init(&dev->video.ctrl_mutex); - INIT_LIST_HEAD(&dev->video.iterms); - INIT_LIST_HEAD(&dev->video.extensions); - dev->video.oterm = term; - dev->video.dev = dev; - if (uvc_scan_chain(&dev->video) < 0) + /* If the terminal is already included in a chain, skip it. + * This can happen for chains that have multiple output + * terminals, where all output terminals beside the first one + * will be inserted in the chain in forward scans. + */ + if (term->chain.next || term->chain.prev) continue; - list_for_each_entry(stream, &dev->streams, list) { - if (stream->header.bTerminalLink == - dev->video.sterm->id) { - uvc_register_video(dev, stream); - found = 1; - break; - } + chain = kzalloc(sizeof(*chain), GFP_KERNEL); + if (chain == NULL) + return -ENOMEM; + + INIT_LIST_HEAD(&chain->iterms); + INIT_LIST_HEAD(&chain->oterms); + INIT_LIST_HEAD(&chain->extensions); + mutex_init(&chain->ctrl_mutex); + chain->dev = dev; + + if (uvc_scan_chain(chain, term) < 0) { + kfree(chain); + continue; } + + uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n", + uvc_print_chain(chain)); + + list_add_tail(&chain->list, &dev->chains); } - if (!found) { + if (list_empty(&dev->chains)) { uvc_printk(KERN_INFO, "No valid video chain found.\n"); return -1; } @@ -1534,6 +1526,133 @@ static int uvc_scan_device(struct uvc_device *dev) return 0; } +/* ------------------------------------------------------------------------ + * Video device registration and unregistration + */ + +/* + * Unregister the video devices. + */ +static void uvc_unregister_video(struct uvc_device *dev) +{ + struct uvc_streaming *stream; + + list_for_each_entry(stream, &dev->streams, list) { + if (stream->vdev == NULL) + continue; + + if (stream->vdev->minor == -1) + video_device_release(stream->vdev); + else + video_unregister_device(stream->vdev); + stream->vdev = NULL; + } +} + +static int uvc_register_video(struct uvc_device *dev, + struct uvc_streaming *stream) +{ + struct video_device *vdev; + int ret; + + /* Initialize the streaming interface with default streaming + * parameters. + */ + ret = uvc_video_init(stream); + if (ret < 0) { + uvc_printk(KERN_ERR, "Failed to initialize the device " + "(%d).\n", ret); + return ret; + } + + /* Register the device with V4L. */ + vdev = video_device_alloc(); + if (vdev == NULL) { + uvc_printk(KERN_ERR, "Failed to allocate video device (%d).\n", + ret); + return -ENOMEM; + } + + /* We already hold a reference to dev->udev. The video device will be + * unregistered before the reference is released, so we don't need to + * get another one. + */ + vdev->parent = &dev->intf->dev; + vdev->minor = -1; + vdev->fops = &uvc_fops; + vdev->release = video_device_release; + strlcpy(vdev->name, dev->name, sizeof vdev->name); + + /* Set the driver data before calling video_register_device, otherwise + * uvc_v4l2_open might race us. + */ + stream->vdev = vdev; + video_set_drvdata(vdev, stream); + + ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1); + if (ret < 0) { + uvc_printk(KERN_ERR, "Failed to register video device (%d).\n", + ret); + stream->vdev = NULL; + video_device_release(vdev); + return ret; + } + + return 0; +} + +/* + * Register all video devices in all chains. + */ +static int uvc_register_terms(struct uvc_device *dev, + struct uvc_video_chain *chain, struct list_head *terms) +{ + struct uvc_streaming *stream; + struct uvc_entity *term; + int ret; + + list_for_each_entry(term, terms, chain) { + if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING) + continue; + + stream = uvc_stream_by_id(dev, term->id); + if (stream == NULL) { + uvc_printk(KERN_INFO, "No streaming interface found " + "for terminal %u.", term->id); + continue; + } + + stream->chain = chain; + ret = uvc_register_video(dev, stream); + if (ret < 0) + return ret; + } + + return 0; +} + +static int uvc_register_chains(struct uvc_device *dev) +{ + struct uvc_video_chain *chain; + int ret; + + list_for_each_entry(chain, &dev->chains, list) { + ret = uvc_register_terms(dev, chain, &chain->iterms); + if (ret < 0) + return ret; + + ret = uvc_register_terms(dev, chain, &chain->oterms); + if (ret < 0) + return ret; + } + + return 0; +} + +/* ------------------------------------------------------------------------ + * USB probe, disconnect, suspend and resume + */ + /* * Delete the UVC device. * @@ -1555,7 +1674,7 @@ void uvc_delete(struct kref *kref) struct uvc_device *dev = container_of(kref, struct uvc_device, kref); struct list_head *p, *n; - /* Unregister the video device. */ + /* Unregister the video devices. */ uvc_unregister_video(dev); usb_put_intf(dev->intf); usb_put_dev(dev->udev); @@ -1563,6 +1682,12 @@ void uvc_delete(struct kref *kref) uvc_status_cleanup(dev); uvc_ctrl_cleanup_device(dev); + list_for_each_safe(p, n, &dev->chains) { + struct uvc_video_chain *chain; + chain = list_entry(p, struct uvc_video_chain, list); + kfree(chain); + } + list_for_each_safe(p, n, &dev->entities) { struct uvc_entity *entity; entity = list_entry(p, struct uvc_entity, list); @@ -1603,6 +1728,7 @@ static int uvc_probe(struct usb_interface *intf, return -ENOMEM; INIT_LIST_HEAD(&dev->entities); + INIT_LIST_HEAD(&dev->chains); INIT_LIST_HEAD(&dev->streams); kref_init(&dev->kref); atomic_set(&dev->users, 0); @@ -1644,10 +1770,14 @@ static int uvc_probe(struct usb_interface *intf, if (uvc_ctrl_init_device(dev) < 0) goto error; - /* Scan the device for video chains and register video devices. */ + /* Scan the device for video chains. */ if (uvc_scan_device(dev) < 0) goto error; + /* Register video devices. */ + if (uvc_register_chains(dev) < 0) + goto error; + /* Save our data pointer in the interface data. */ usb_set_intfdata(intf, dev); diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c index 7e847bbaf2a..9e7351569b5 100644 --- a/drivers/media/video/uvc/uvc_v4l2.c +++ b/drivers/media/video/uvc/uvc_v4l2.c @@ -40,7 +40,7 @@ * table for the controls that can be mapped directly, and handle the others * manually. */ -static int uvc_v4l2_query_menu(struct uvc_video_device *video, +static int uvc_v4l2_query_menu(struct uvc_video_chain *chain, struct v4l2_querymenu *query_menu) { struct uvc_menu_info *menu_info; @@ -49,7 +49,7 @@ static int uvc_v4l2_query_menu(struct uvc_video_device *video, u32 index = query_menu->index; u32 id = query_menu->id; - ctrl = uvc_find_control(video, query_menu->id, &mapping); + ctrl = uvc_find_control(chain, query_menu->id, &mapping); if (ctrl == NULL || mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) return -EINVAL; @@ -451,7 +451,7 @@ static int uvc_v4l2_open(struct file *file) } } - handle->video = &stream->dev->video; + handle->chain = stream->chain; handle->stream = stream; handle->state = UVC_HANDLE_PASSIVE; file->private_data = handle; @@ -498,7 +498,7 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) { struct video_device *vdev = video_devdata(file); struct uvc_fh *handle = (struct uvc_fh *)file->private_data; - struct uvc_video_device *video = handle->video; + struct uvc_video_chain *chain = handle->chain; struct uvc_streaming *stream = handle->stream; long ret = 0; @@ -525,7 +525,7 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) /* Get, Set & Query control */ case VIDIOC_QUERYCTRL: - return uvc_query_v4l2_ctrl(video, arg); + return uvc_query_v4l2_ctrl(chain, arg); case VIDIOC_G_CTRL: { @@ -535,12 +535,12 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) memset(&xctrl, 0, sizeof xctrl); xctrl.id = ctrl->id; - ret = uvc_ctrl_begin(video); - if (ret < 0) + ret = uvc_ctrl_begin(chain); + if (ret < 0) return ret; - ret = uvc_ctrl_get(video, &xctrl); - uvc_ctrl_rollback(video); + ret = uvc_ctrl_get(chain, &xctrl); + uvc_ctrl_rollback(chain); if (ret >= 0) ctrl->value = xctrl.value; break; @@ -555,21 +555,21 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) xctrl.id = ctrl->id; xctrl.value = ctrl->value; - ret = uvc_ctrl_begin(video); - if (ret < 0) + uvc_ctrl_begin(chain); + if (ret < 0) return ret; - ret = uvc_ctrl_set(video, &xctrl); + ret = uvc_ctrl_set(chain, &xctrl); if (ret < 0) { - uvc_ctrl_rollback(video); + uvc_ctrl_rollback(chain); return ret; } - ret = uvc_ctrl_commit(video); + ret = uvc_ctrl_commit(chain); break; } case VIDIOC_QUERYMENU: - return uvc_v4l2_query_menu(video, arg); + return uvc_v4l2_query_menu(chain, arg); case VIDIOC_G_EXT_CTRLS: { @@ -577,20 +577,20 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) struct v4l2_ext_control *ctrl = ctrls->controls; unsigned int i; - ret = uvc_ctrl_begin(video); - if (ret < 0) + ret = uvc_ctrl_begin(chain); + if (ret < 0) return ret; for (i = 0; i < ctrls->count; ++ctrl, ++i) { - ret = uvc_ctrl_get(video, ctrl); + ret = uvc_ctrl_get(chain, ctrl); if (ret < 0) { - uvc_ctrl_rollback(video); + uvc_ctrl_rollback(chain); ctrls->error_idx = i; return ret; } } ctrls->error_idx = 0; - ret = uvc_ctrl_rollback(video); + ret = uvc_ctrl_rollback(chain); break; } @@ -601,14 +601,14 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) struct v4l2_ext_control *ctrl = ctrls->controls; unsigned int i; - ret = uvc_ctrl_begin(video); + ret = uvc_ctrl_begin(chain); if (ret < 0) return ret; for (i = 0; i < ctrls->count; ++ctrl, ++i) { - ret = uvc_ctrl_set(video, ctrl); + ret = uvc_ctrl_set(chain, ctrl); if (ret < 0) { - uvc_ctrl_rollback(video); + uvc_ctrl_rollback(chain); ctrls->error_idx = i; return ret; } @@ -617,31 +617,31 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) ctrls->error_idx = 0; if (cmd == VIDIOC_S_EXT_CTRLS) - ret = uvc_ctrl_commit(video); + ret = uvc_ctrl_commit(chain); else - ret = uvc_ctrl_rollback(video); + ret = uvc_ctrl_rollback(chain); break; } /* Get, Set & Enum input */ case VIDIOC_ENUMINPUT: { - const struct uvc_entity *selector = video->selector; + const struct uvc_entity *selector = chain->selector; struct v4l2_input *input = arg; struct uvc_entity *iterm = NULL; u32 index = input->index; int pin = 0; if (selector == NULL || - (video->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { + (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { if (index != 0) return -EINVAL; - iterm = list_first_entry(&video->iterms, + iterm = list_first_entry(&chain->iterms, struct uvc_entity, chain); pin = iterm->id; } else if (pin < selector->selector.bNrInPins) { pin = selector->selector.baSourceID[index]; - list_for_each_entry(iterm, video->iterms.next, chain) { + list_for_each_entry(iterm, chain->iterms.next, chain) { if (iterm->id == pin) break; } @@ -662,14 +662,14 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) { u8 input; - if (video->selector == NULL || - (video->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { + if (chain->selector == NULL || + (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { *(int *)arg = 0; break; } - ret = uvc_query_ctrl(video->dev, UVC_GET_CUR, - video->selector->id, video->dev->intfnum, + ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, + chain->selector->id, chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL, &input, 1); if (ret < 0) return ret; @@ -685,18 +685,18 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) if ((ret = uvc_acquire_privileges(handle)) < 0) return ret; - if (video->selector == NULL || - (video->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { + if (chain->selector == NULL || + (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { if (input != 1) return -EINVAL; break; } - if (input == 0 || input > video->selector->selector.bNrInPins) + if (input == 0 || input > chain->selector->selector.bNrInPins) return -EINVAL; - return uvc_query_ctrl(video->dev, UVC_SET_CUR, - video->selector->id, video->dev->intfnum, + return uvc_query_ctrl(chain->dev, UVC_SET_CUR, + chain->selector->id, chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL, &input, 1); } @@ -1019,10 +1019,10 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) } case UVCIOC_CTRL_GET: - return uvc_xu_ctrl_query(video, arg, 0); + return uvc_xu_ctrl_query(chain, arg, 0); case UVCIOC_CTRL_SET: - return uvc_xu_ctrl_query(video, arg, 1); + return uvc_xu_ctrl_query(chain, arg, 1); default: if ((ret = v4l_compat_translate_ioctl(file, cmd, arg, diff --git a/drivers/media/video/uvc/uvc_video.c b/drivers/media/video/uvc/uvc_video.c index acbd73ac6bf..5b757f32d99 100644 --- a/drivers/media/video/uvc/uvc_video.c +++ b/drivers/media/video/uvc/uvc_video.c @@ -128,7 +128,7 @@ static int uvc_get_video_ctrl(struct uvc_streaming *stream, if (data == NULL) return -ENOMEM; - if ((video->dev->quirks & UVC_QUIRK_PROBE_DEF) && query == UVC_GET_DEF) + if ((stream->dev->quirks & UVC_QUIRK_PROBE_DEF) && query == UVC_GET_DEF) return -EIO; ret = __uvc_query_ctrl(stream->dev, query, 0, stream->intfnum, diff --git a/drivers/media/video/uvc/uvcvideo.h b/drivers/media/video/uvc/uvcvideo.h index 3cd9041e22a..e7958aa454c 100644 --- a/drivers/media/video/uvc/uvcvideo.h +++ b/drivers/media/video/uvc/uvcvideo.h @@ -80,9 +80,11 @@ struct uvc_xu_control { #define UVC_ENTITY_IS_UNIT(entity) (((entity)->type & 0xff00) == 0) #define UVC_ENTITY_IS_TERM(entity) (((entity)->type & 0xff00) != 0) #define UVC_ENTITY_IS_ITERM(entity) \ - (((entity)->type & 0x8000) == UVC_TERM_INPUT) + (UVC_ENTITY_IS_TERM(entity) && \ + ((entity)->type & 0x8000) == UVC_TERM_INPUT) #define UVC_ENTITY_IS_OTERM(entity) \ - (((entity)->type & 0x8000) == UVC_TERM_OUTPUT) + (UVC_ENTITY_IS_TERM(entity) && \ + ((entity)->type & 0x8000) == UVC_TERM_OUTPUT) /* ------------------------------------------------------------------------ @@ -402,10 +404,24 @@ struct uvc_video_queue { struct list_head irqqueue; }; +struct uvc_video_chain { + struct uvc_device *dev; + struct list_head list; + + struct list_head iterms; /* Input terminals */ + struct list_head oterms; /* Output terminals */ + struct uvc_entity *processing; /* Processing unit */ + struct uvc_entity *selector; /* Selector unit */ + struct list_head extensions; /* Extension units */ + + struct mutex ctrl_mutex; +}; + struct uvc_streaming { struct list_head list; struct uvc_device *dev; struct video_device *vdev; + struct uvc_video_chain *chain; atomic_t active; struct usb_interface *intf; @@ -446,18 +462,6 @@ struct uvc_streaming { __u8 last_fid; }; -struct uvc_video_device { - struct uvc_device *dev; - - struct list_head iterms; /* Input terminals */ - struct uvc_entity *oterm; /* Output terminal */ - struct uvc_entity *sterm; /* USB streaming terminal */ - struct uvc_entity *processing; - struct uvc_entity *selector; - struct list_head extensions; - struct mutex ctrl_mutex; -}; - enum uvc_device_state { UVC_DEV_DISCONNECTED = 1, }; @@ -480,8 +484,7 @@ struct uvc_device { __u32 clock_frequency; struct list_head entities; - - struct uvc_video_device video; + struct list_head chains; /* Video Streaming interfaces */ struct list_head streams; @@ -500,7 +503,7 @@ enum uvc_handle_state { }; struct uvc_fh { - struct uvc_video_device *video; + struct uvc_video_chain *chain; struct uvc_streaming *stream; enum uvc_handle_state state; }; @@ -618,9 +621,9 @@ extern int uvc_status_suspend(struct uvc_device *dev); extern int uvc_status_resume(struct uvc_device *dev); /* Controls */ -extern struct uvc_control *uvc_find_control(struct uvc_video_device *video, +extern struct uvc_control *uvc_find_control(struct uvc_video_chain *chain, __u32 v4l2_id, struct uvc_control_mapping **mapping); -extern int uvc_query_v4l2_ctrl(struct uvc_video_device *video, +extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, struct v4l2_queryctrl *v4l2_ctrl); extern int uvc_ctrl_add_info(struct uvc_control_info *info); @@ -630,23 +633,23 @@ extern void uvc_ctrl_cleanup_device(struct uvc_device *dev); extern int uvc_ctrl_resume_device(struct uvc_device *dev); extern void uvc_ctrl_init(void); -extern int uvc_ctrl_begin(struct uvc_video_device *video); -extern int __uvc_ctrl_commit(struct uvc_video_device *video, int rollback); -static inline int uvc_ctrl_commit(struct uvc_video_device *video) +extern int uvc_ctrl_begin(struct uvc_video_chain *chain); +extern int __uvc_ctrl_commit(struct uvc_video_chain *chain, int rollback); +static inline int uvc_ctrl_commit(struct uvc_video_chain *chain) { - return __uvc_ctrl_commit(video, 0); + return __uvc_ctrl_commit(chain, 0); } -static inline int uvc_ctrl_rollback(struct uvc_video_device *video) +static inline int uvc_ctrl_rollback(struct uvc_video_chain *chain) { - return __uvc_ctrl_commit(video, 1); + return __uvc_ctrl_commit(chain, 1); } -extern int uvc_ctrl_get(struct uvc_video_device *video, +extern int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl); -extern int uvc_ctrl_set(struct uvc_video_device *video, +extern int uvc_ctrl_set(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl); -extern int uvc_xu_ctrl_query(struct uvc_video_device *video, +extern int uvc_xu_ctrl_query(struct uvc_video_chain *chain, struct uvc_xu_control *ctrl, int set); /* Utility functions */ |