From 8ca5a639f4f3eb8958a7e270fcff7516374637a5 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Wed, 25 Nov 2009 12:00:30 -0300 Subject: V4L/DVB (13506): uvcvideo: Factorize common field in uvc_entity structure The bNrInPins and baSourceID fields are common among all entities (some of use bSourceID but this is conceptually the same). Move those two fields out of entity type-specific unions into the uvc_entity structure top level. Signed-off-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/uvc/uvc_driver.c | 119 +++++++++++++++-------------------- 1 file changed, 51 insertions(+), 68 deletions(-) (limited to 'drivers/media/video/uvc/uvc_driver.c') diff --git a/drivers/media/video/uvc/uvc_driver.c b/drivers/media/video/uvc/uvc_driver.c index e7ce898..c31bc50 100644 --- a/drivers/media/video/uvc/uvc_driver.c +++ b/drivers/media/video/uvc/uvc_driver.c @@ -249,29 +249,9 @@ static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev, entity = list_entry(&dev->entities, struct uvc_entity, list); list_for_each_entry_continue(entity, &dev->entities, list) { - switch (UVC_ENTITY_TYPE(entity)) { - case UVC_TT_STREAMING: - if (entity->output.bSourceID == id) - return entity; - break; - - case UVC_VC_PROCESSING_UNIT: - if (entity->processing.bSourceID == id) + for (i = 0; i < entity->bNrInPins; ++i) + if (entity->baSourceID[i] == id) return entity; - break; - - case UVC_VC_SELECTOR_UNIT: - for (i = 0; i < entity->selector.bNrInPins; ++i) - if (entity->selector.baSourceID[i] == id) - return entity; - break; - - case UVC_VC_EXTENSION_UNIT: - for (i = 0; i < entity->extension.bNrInPins; ++i) - if (entity->extension.baSourceID[i] == id) - return entity; - break; - } } return NULL; @@ -785,6 +765,28 @@ error: return ret; } +static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id, + unsigned int num_pads, unsigned int extra_size) +{ + struct uvc_entity *entity; + unsigned int num_inputs; + unsigned int size; + + num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1; + size = sizeof(*entity) + extra_size + num_inputs; + entity = kzalloc(size, GFP_KERNEL); + if (entity == NULL) + return NULL; + + entity->id = id; + entity->type = type; + + entity->bNrInPins = num_inputs; + entity->baSourceID = ((__u8 *)entity) + sizeof(*entity) + extra_size; + + return entity; +} + /* Parse vendor-specific extensions. */ static int uvc_parse_vendor_control(struct uvc_device *dev, const unsigned char *buffer, int buflen) @@ -836,21 +838,18 @@ static int uvc_parse_vendor_control(struct uvc_device *dev, break; } - unit = kzalloc(sizeof *unit + p + 2*n, GFP_KERNEL); + unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3], + p + 1, 2*n); if (unit == NULL) return -ENOMEM; - unit->id = buffer[3]; - unit->type = UVC_VC_EXTENSION_UNIT; memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); unit->extension.bNumControls = buffer[20]; - unit->extension.bNrInPins = buffer[21]; - unit->extension.baSourceID = (__u8 *)unit + sizeof *unit; - memcpy(unit->extension.baSourceID, &buffer[22], p); + memcpy(unit->baSourceID, &buffer[22], p); unit->extension.bControlSize = buffer[22+p]; - unit->extension.bmControls = (__u8 *)unit + sizeof *unit + p; - unit->extension.bmControlsType = (__u8 *)unit + sizeof *unit - + p + n; + unit->extension.bmControls = (__u8 *)unit + sizeof(*unit); + unit->extension.bmControlsType = (__u8 *)unit + sizeof(*unit) + + n; memcpy(unit->extension.bmControls, &buffer[23+p], 2*n); if (buffer[24+p+2*n] != 0) @@ -947,13 +946,11 @@ static int uvc_parse_standard_control(struct uvc_device *dev, return -EINVAL; } - term = kzalloc(sizeof *term + n + p, GFP_KERNEL); + term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3], + 1, n + p); if (term == NULL) return -ENOMEM; - term->id = buffer[3]; - term->type = type | UVC_TERM_INPUT; - if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) { term->camera.bControlSize = n; term->camera.bmControls = (__u8 *)term + sizeof *term; @@ -1008,13 +1005,12 @@ static int uvc_parse_standard_control(struct uvc_device *dev, return 0; } - term = kzalloc(sizeof *term, GFP_KERNEL); + term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3], + 1, 0); if (term == NULL) return -ENOMEM; - term->id = buffer[3]; - term->type = type | UVC_TERM_OUTPUT; - term->output.bSourceID = buffer[7]; + memcpy(term->baSourceID, &buffer[7], 1); if (buffer[8] != 0) usb_string(udev, buffer[8], term->name, @@ -1035,15 +1031,11 @@ static int uvc_parse_standard_control(struct uvc_device *dev, return -EINVAL; } - unit = kzalloc(sizeof *unit + p, GFP_KERNEL); + unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0); if (unit == NULL) return -ENOMEM; - unit->id = buffer[3]; - unit->type = buffer[2]; - unit->selector.bNrInPins = buffer[4]; - unit->selector.baSourceID = (__u8 *)unit + sizeof *unit; - memcpy(unit->selector.baSourceID, &buffer[5], p); + memcpy(unit->baSourceID, &buffer[5], p); if (buffer[5+p] != 0) usb_string(udev, buffer[5+p], unit->name, @@ -1065,13 +1057,11 @@ static int uvc_parse_standard_control(struct uvc_device *dev, return -EINVAL; } - unit = kzalloc(sizeof *unit + n, GFP_KERNEL); + unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n); if (unit == NULL) return -ENOMEM; - unit->id = buffer[3]; - unit->type = buffer[2]; - unit->processing.bSourceID = buffer[4]; + memcpy(unit->baSourceID, &buffer[4], 1); unit->processing.wMaxMultiplier = get_unaligned_le16(&buffer[5]); unit->processing.bControlSize = buffer[7]; @@ -1100,19 +1090,15 @@ static int uvc_parse_standard_control(struct uvc_device *dev, return -EINVAL; } - unit = kzalloc(sizeof *unit + p + n, GFP_KERNEL); + unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n); if (unit == NULL) return -ENOMEM; - unit->id = buffer[3]; - unit->type = buffer[2]; memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); unit->extension.bNumControls = buffer[20]; - unit->extension.bNrInPins = buffer[21]; - unit->extension.baSourceID = (__u8 *)unit + sizeof *unit; - memcpy(unit->extension.baSourceID, &buffer[22], p); + memcpy(unit->baSourceID, &buffer[22], p); unit->extension.bControlSize = buffer[22+p]; - unit->extension.bmControls = (__u8 *)unit + sizeof *unit + p; + unit->extension.bmControls = (__u8 *)unit + sizeof *unit; memcpy(unit->extension.bmControls, &buffer[23+p], n); if (buffer[23+p+n] != 0) @@ -1218,7 +1204,7 @@ static int uvc_scan_chain_entity(struct uvc_video_chain *chain, if (uvc_trace_param & UVC_TRACE_PROBE) printk(" <- XU %d", entity->id); - if (entity->extension.bNrInPins != 1) { + if (entity->bNrInPins != 1) { uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more " "than 1 input pin.\n", entity->id); return -1; @@ -1244,7 +1230,7 @@ static int uvc_scan_chain_entity(struct uvc_video_chain *chain, printk(" <- SU %d", entity->id); /* Single-input selector units are ignored. */ - if (entity->selector.bNrInPins == 1) + if (entity->bNrInPins == 1) break; if (chain->selector != NULL) { @@ -1305,7 +1291,7 @@ static int uvc_scan_chain_forward(struct uvc_video_chain *chain, switch (UVC_ENTITY_TYPE(forward)) { case UVC_VC_EXTENSION_UNIT: - if (forward->extension.bNrInPins != 1) { + if (forward->bNrInPins != 1) { uvc_trace(UVC_TRACE_DESCR, "Extension unit %d " "has more than 1 input pin.\n", entity->id); @@ -1358,17 +1344,14 @@ static int uvc_scan_chain_backward(struct uvc_video_chain *chain, switch (UVC_ENTITY_TYPE(entity)) { case UVC_VC_EXTENSION_UNIT: - id = entity->extension.baSourceID[0]; - break; - case UVC_VC_PROCESSING_UNIT: - id = entity->processing.bSourceID; + id = entity->baSourceID[0]; break; case UVC_VC_SELECTOR_UNIT: /* Single-input selector units are ignored. */ - if (entity->selector.bNrInPins == 1) { - id = entity->selector.baSourceID[0]; + if (entity->bNrInPins == 1) { + id = entity->baSourceID[0]; break; } @@ -1376,8 +1359,8 @@ static int uvc_scan_chain_backward(struct uvc_video_chain *chain, printk(" <- IT"); chain->selector = entity; - for (i = 0; i < entity->selector.bNrInPins; ++i) { - id = entity->selector.baSourceID[i]; + for (i = 0; i < entity->bNrInPins; ++i) { + id = entity->baSourceID[i]; term = uvc_entity_by_id(chain->dev, id); if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) { uvc_trace(UVC_TRACE_DESCR, "Selector unit %d " @@ -1406,7 +1389,7 @@ static int uvc_scan_chain_backward(struct uvc_video_chain *chain, case UVC_OTT_DISPLAY: case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: case UVC_TT_STREAMING: - id = UVC_ENTITY_IS_OTERM(entity) ? entity->output.bSourceID : 0; + id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0; break; } -- cgit v1.1