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uvcvideo fixes and improvements

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Merge tag 'media-uvc-next-20230115' of git://git.kernel.org/pub/scm/linux/kernel/git/pinchartl/linux into media_stage

uvcvideo fixes and improvements

* tag 'media-uvc-next-20230115' of git://git.kernel.org/pub/scm/linux/kernel/git/pinchartl/linux: (27 commits)
  media: uvcvideo: Silence memcpy() run-time false positive warnings
  media: uvcvideo: Quirk for autosuspend in Logitech B910 and C910
  media: uvcvideo: Fix race condition with usb_kill_urb
  media: uvcvideo: Use standard names for menus
  media: uvcvideo: Fix power line control for Lenovo Integrated Camera
  media: uvcvideo: Refactor power_line_frequency_controls_limited
  media: uvcvideo: Refactor uvc_ctrl_mappings_uvcXX
  media: uvcvideo: Implement mask for V4L2_CTRL_TYPE_MENU
  media: uvcvideo: Extend documentation of uvc_video_clock_decode()
  media: uvcvideo: Limit power line control for Acer EasyCamera
  media: uvcvideo: Refactor __uvc_ctrl_add_mapping
  media: uvcvideo: Fix handling on Bitmask controls
  media: uvcvideo: Do not return positive errors in uvc_query_ctrl()
  media: uvcvideo: Return -EACCES for Wrong state error
  media: uvcvideo: Improve error logging in uvc_query_ctrl()
  media: uvcvideo: Check for INACTIVE in uvc_ctrl_is_accessible()
  media: uvcvideo: Factor out usb_string() calls
  media: uvcvideo: Limit power line control for Acer EasyCamera
  media: uvcvideo: Recover stalled ElGato devices
  media: uvcvideo: Remove void casting for the status endpoint
  ...

Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Mauro Carvalho Chehab 2023-01-22 08:43:05 +01:00
commit 82adfe3469
8 changed files with 595 additions and 267 deletions
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340
drivers/media/usb/uvc/uvc_ctrl.c
View file

@ -6,6 +6,8 @@
* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*/
#include <asm/barrier.h>
#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
@ -363,19 +365,45 @@ static const u32 uvc_control_classes[] = {
V4L2_CID_USER_CLASS,
};
static const struct uvc_menu_info power_line_frequency_controls[] = {
{ 0, "Disabled" },
{ 1, "50 Hz" },
{ 2, "60 Hz" },
{ 3, "Auto" },
};
static const int exposure_auto_mapping[] = { 2, 1, 4, 8 };
static const struct uvc_menu_info exposure_auto_controls[] = {
{ 2, "Auto Mode" },
{ 1, "Manual Mode" },
{ 4, "Shutter Priority Mode" },
{ 8, "Aperture Priority Mode" },
};
/*
* This function translates the V4L2 menu index @idx, as exposed to userspace as
* the V4L2 control value, to the corresponding UVC control value used by the
* device. The custom menu_mapping in the control @mapping is used when
* available, otherwise the function assumes that the V4L2 and UVC values are
* identical.
*
* For controls of type UVC_CTRL_DATA_TYPE_BITMASK, the UVC control value is
* expressed as a bitmask and is thus guaranteed to have a single bit set.
*
* The function returns -EINVAL if the V4L2 menu index @idx isn't valid for the
* control, which includes all controls whose type isn't UVC_CTRL_DATA_TYPE_ENUM
* or UVC_CTRL_DATA_TYPE_BITMASK.
*/
static int uvc_mapping_get_menu_value(const struct uvc_control_mapping *mapping,
u32 idx)
{
if (!test_bit(idx, &mapping->menu_mask))
return -EINVAL;
if (mapping->menu_mapping)
return mapping->menu_mapping[idx];
return idx;
}
static const char *
uvc_mapping_get_menu_name(const struct uvc_control_mapping *mapping, u32 idx)
{
if (!test_bit(idx, &mapping->menu_mask))
return NULL;
if (mapping->menu_names)
return mapping->menu_names[idx];
return v4l2_ctrl_get_menu(mapping->id)[idx];
}
static s32 uvc_ctrl_get_zoom(struct uvc_control_mapping *mapping,
u8 query, const u8 *data)
@ -524,8 +552,9 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_MENU,
.data_type = UVC_CTRL_DATA_TYPE_BITMASK,
.menu_info = exposure_auto_controls,
.menu_count = ARRAY_SIZE(exposure_auto_controls),
.menu_mapping = exposure_auto_mapping,
.menu_mask = GENMASK(V4L2_EXPOSURE_APERTURE_PRIORITY,
V4L2_EXPOSURE_AUTO),
.slave_ids = { V4L2_CID_EXPOSURE_ABSOLUTE, },
},
{
@ -721,32 +750,50 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
};
static const struct uvc_control_mapping uvc_ctrl_mappings_uvc11[] = {
{
.id = V4L2_CID_POWER_LINE_FREQUENCY,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
.size = 2,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_MENU,
.data_type = UVC_CTRL_DATA_TYPE_ENUM,
.menu_info = power_line_frequency_controls,
.menu_count = ARRAY_SIZE(power_line_frequency_controls) - 1,
},
const struct uvc_control_mapping uvc_ctrl_power_line_mapping_limited = {
.id = V4L2_CID_POWER_LINE_FREQUENCY,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
.size = 2,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_MENU,
.data_type = UVC_CTRL_DATA_TYPE_ENUM,
.menu_mask = GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
V4L2_CID_POWER_LINE_FREQUENCY_50HZ),
};
static const struct uvc_control_mapping uvc_ctrl_mappings_uvc15[] = {
{
.id = V4L2_CID_POWER_LINE_FREQUENCY,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
.size = 2,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_MENU,
.data_type = UVC_CTRL_DATA_TYPE_ENUM,
.menu_info = power_line_frequency_controls,
.menu_count = ARRAY_SIZE(power_line_frequency_controls),
},
const struct uvc_control_mapping uvc_ctrl_power_line_mapping_uvc11 = {
.id = V4L2_CID_POWER_LINE_FREQUENCY,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
.size = 2,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_MENU,
.data_type = UVC_CTRL_DATA_TYPE_ENUM,
.menu_mask = GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
V4L2_CID_POWER_LINE_FREQUENCY_DISABLED),
};
static const struct uvc_control_mapping *uvc_ctrl_mappings_uvc11[] = {
&uvc_ctrl_power_line_mapping_uvc11,
NULL, /* Sentinel */
};
static const struct uvc_control_mapping uvc_ctrl_power_line_mapping_uvc15 = {
.id = V4L2_CID_POWER_LINE_FREQUENCY,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
.size = 2,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_MENU,
.data_type = UVC_CTRL_DATA_TYPE_ENUM,
.menu_mask = GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_AUTO,
V4L2_CID_POWER_LINE_FREQUENCY_DISABLED),
};
static const struct uvc_control_mapping *uvc_ctrl_mappings_uvc15[] = {
&uvc_ctrl_power_line_mapping_uvc15,
NULL, /* Sentinel */
};
/* ------------------------------------------------------------------------
@ -972,11 +1019,17 @@ static s32 __uvc_ctrl_get_value(struct uvc_control_mapping *mapping,
s32 value = mapping->get(mapping, UVC_GET_CUR, data);
if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) {
const struct uvc_menu_info *menu = mapping->menu_info;
unsigned int i;
for (i = 0; i < mapping->menu_count; ++i, ++menu) {
if (menu->value == value) {
for (i = 0; BIT(i) <= mapping->menu_mask; ++i) {
u32 menu_value;
if (!test_bit(i, &mapping->menu_mask))
continue;
menu_value = uvc_mapping_get_menu_value(mapping, i);
if (menu_value == value) {
value = i;
break;
}
@ -1085,11 +1138,28 @@ static int uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id,
return 0;
}
/*
* Check if control @v4l2_id can be accessed by the given control @ioctl
* (VIDIOC_G_EXT_CTRLS, VIDIOC_TRY_EXT_CTRLS or VIDIOC_S_EXT_CTRLS).
*
* For set operations on slave controls, check if the master's value is set to
* manual, either in the others controls set in the same ioctl call, or from
* the master's current value. This catches VIDIOC_S_EXT_CTRLS calls that set
* both the master and slave control, such as for instance setting
* auto_exposure=1, exposure_time_absolute=251.
*/
int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id,
bool read)
const struct v4l2_ext_controls *ctrls,
unsigned long ioctl)
{
struct uvc_control_mapping *master_map = NULL;
struct uvc_control *master_ctrl = NULL;
struct uvc_control_mapping *mapping;
struct uvc_control *ctrl;
bool read = ioctl == VIDIOC_G_EXT_CTRLS;
s32 val;
int ret;
int i;
if (__uvc_query_v4l2_class(chain, v4l2_id, 0) >= 0)
return -EACCES;
@ -1104,6 +1174,29 @@ int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id,
if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR) && !read)
return -EACCES;
if (ioctl != VIDIOC_S_EXT_CTRLS || !mapping->master_id)
return 0;
/*
* Iterate backwards in cases where the master control is accessed
* multiple times in the same ioctl. We want the last value.
*/
for (i = ctrls->count - 1; i >= 0; i--) {
if (ctrls->controls[i].id == mapping->master_id)
return ctrls->controls[i].value ==
mapping->master_manual ? 0 : -EACCES;
}
__uvc_find_control(ctrl->entity, mapping->master_id, &master_map,
&master_ctrl, 0);
if (!master_ctrl || !(master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR))
return 0;
ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val);
if (ret >= 0 && val != mapping->master_manual)
return -EACCES;
return 0;
}
@ -1121,6 +1214,25 @@ static const char *uvc_map_get_name(const struct uvc_control_mapping *map)
return "Unknown Control";
}
static u32 uvc_get_ctrl_bitmap(struct uvc_control *ctrl,
struct uvc_control_mapping *mapping)
{
/*
* Some controls, like CT_AE_MODE_CONTROL, use GET_RES to represent
* the number of bits supported. Those controls do not list GET_MAX
* as supported.
*/
if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)
return mapping->get(mapping, UVC_GET_RES,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES));
if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX)
return mapping->get(mapping, UVC_GET_MAX,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX));
return ~0;
}
static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
struct uvc_control *ctrl,
struct uvc_control_mapping *mapping,
@ -1128,7 +1240,6 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
{
struct uvc_control_mapping *master_map = NULL;
struct uvc_control *master_ctrl = NULL;
const struct uvc_menu_info *menu;
unsigned int i;
memset(v4l2_ctrl, 0, sizeof(*v4l2_ctrl));
@ -1169,13 +1280,19 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
switch (mapping->v4l2_type) {
case V4L2_CTRL_TYPE_MENU:
v4l2_ctrl->minimum = 0;
v4l2_ctrl->maximum = mapping->menu_count - 1;
v4l2_ctrl->minimum = ffs(mapping->menu_mask) - 1;
v4l2_ctrl->maximum = fls(mapping->menu_mask) - 1;
v4l2_ctrl->step = 1;
menu = mapping->menu_info;
for (i = 0; i < mapping->menu_count; ++i, ++menu) {
if (menu->value == v4l2_ctrl->default_value) {
for (i = 0; BIT(i) <= mapping->menu_mask; ++i) {
u32 menu_value;
if (!test_bit(i, &mapping->menu_mask))
continue;
menu_value = uvc_mapping_get_menu_value(mapping, i);
if (menu_value == v4l2_ctrl->default_value) {
v4l2_ctrl->default_value = i;
break;
}
@ -1195,6 +1312,12 @@ static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
v4l2_ctrl->step = 0;
return 0;
case V4L2_CTRL_TYPE_BITMASK:
v4l2_ctrl->minimum = 0;
v4l2_ctrl->maximum = uvc_get_ctrl_bitmap(ctrl, mapping);
v4l2_ctrl->step = 0;
return 0;
default:
break;
}
@ -1268,11 +1391,11 @@ int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
struct v4l2_querymenu *query_menu)
{
const struct uvc_menu_info *menu_info;
struct uvc_control_mapping *mapping;
struct uvc_control *ctrl;
u32 index = query_menu->index;
u32 id = query_menu->id;
const char *name;
int ret;
memset(query_menu, 0, sizeof(*query_menu));
@ -1289,16 +1412,13 @@ int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
goto done;
}
if (query_menu->index >= mapping->menu_count) {
if (!test_bit(query_menu->index, &mapping->menu_mask)) {
ret = -EINVAL;
goto done;
}
menu_info = &mapping->menu_info[query_menu->index];
if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK &&
(ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)) {
s32 bitmap;
if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK) {
int mask;
if (!ctrl->cached) {
ret = uvc_ctrl_populate_cache(chain, ctrl);
@ -1306,15 +1426,25 @@ int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
goto done;
}
bitmap = mapping->get(mapping, UVC_GET_RES,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES));
if (!(bitmap & menu_info->value)) {
mask = uvc_mapping_get_menu_value(mapping, query_menu->index);
if (mask < 0) {
ret = mask;
goto done;
}
if (!(uvc_get_ctrl_bitmap(ctrl, mapping) & mask)) {
ret = -EINVAL;
goto done;
}
}
strscpy(query_menu->name, menu_info->name, sizeof(query_menu->name));
name = uvc_mapping_get_menu_name(mapping, query_menu->index);
if (!name) {
ret = -EINVAL;
goto done;
}
strscpy(query_menu->name, name, sizeof(query_menu->name));
done:
mutex_unlock(&chain->ctrl_mutex);
@ -1442,6 +1572,10 @@ static void uvc_ctrl_status_event_work(struct work_struct *work)
uvc_ctrl_status_event(w->chain, w->ctrl, w->data);
/* The barrier is needed to synchronize with uvc_status_stop(). */
if (smp_load_acquire(&dev->flush_status))
return;
/* Resubmit the URB. */
w->urb->interval = dev->int_ep->desc.bInterval;
ret = usb_submit_urb(w->urb, GFP_KERNEL);
@ -1791,31 +1925,44 @@ int uvc_ctrl_set(struct uvc_fh *handle,
value = xctrl->value;
break;
case V4L2_CTRL_TYPE_BITMASK:
if (!ctrl->cached) {
ret = uvc_ctrl_populate_cache(chain, ctrl);
if (ret < 0)
return ret;
}
xctrl->value &= uvc_get_ctrl_bitmap(ctrl, mapping);
value = xctrl->value;
break;
case V4L2_CTRL_TYPE_BOOLEAN:
xctrl->value = clamp(xctrl->value, 0, 1);
value = xctrl->value;
break;
case V4L2_CTRL_TYPE_MENU:
if (xctrl->value < 0 || xctrl->value >= mapping->menu_count)
if (xctrl->value < (ffs(mapping->menu_mask) - 1) ||
xctrl->value > (fls(mapping->menu_mask) - 1))
return -ERANGE;
value = mapping->menu_info[xctrl->value].value;
if (!test_bit(xctrl->value, &mapping->menu_mask))
return -EINVAL;
value = uvc_mapping_get_menu_value(mapping, xctrl->value);
/*
* Valid menu indices are reported by the GET_RES request for
* UVC controls that support it.
*/
if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK &&
(ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)) {
if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK) {
if (!ctrl->cached) {
ret = uvc_ctrl_populate_cache(chain, ctrl);
if (ret < 0)
return ret;
}
step = mapping->get(mapping, UVC_GET_RES,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES));
if (!(step & value))
if (!(uvc_get_ctrl_bitmap(ctrl, mapping) & value))
return -EINVAL;
}
@ -2218,31 +2365,42 @@ static int __uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
unsigned int i;
/*
* Most mappings come from static kernel data and need to be duplicated.
* Most mappings come from static kernel data, and need to be duplicated.
* Mappings that come from userspace will be unnecessarily duplicated,
* this could be optimized.
*/
map = kmemdup(mapping, sizeof(*mapping), GFP_KERNEL);
if (map == NULL)
if (!map)
return -ENOMEM;
map->name = NULL;
map->menu_names = NULL;
map->menu_mapping = NULL;
/* For UVCIOC_CTRL_MAP custom control */
if (mapping->name) {
map->name = kstrdup(mapping->name, GFP_KERNEL);
if (!map->name) {
kfree(map);
return -ENOMEM;
}
if (!map->name)
goto err_nomem;
}
INIT_LIST_HEAD(&map->ev_subs);
size = sizeof(*mapping->menu_info) * mapping->menu_count;
map->menu_info = kmemdup(mapping->menu_info, size, GFP_KERNEL);
if (map->menu_info == NULL) {
kfree(map->name);
kfree(map);
return -ENOMEM;
if (mapping->menu_mapping && mapping->menu_mask) {
size = sizeof(mapping->menu_mapping[0])
* fls(mapping->menu_mask);
map->menu_mapping = kmemdup(mapping->menu_mapping, size,
GFP_KERNEL);
if (!map->menu_mapping)
goto err_nomem;
}
if (mapping->menu_names && mapping->menu_mask) {
size = sizeof(mapping->menu_names[0])
* fls(mapping->menu_mask);
map->menu_names = kmemdup(mapping->menu_names, size,
GFP_KERNEL);
if (!map->menu_names)
goto err_nomem;
}
if (map->get == NULL)
@ -2264,6 +2422,13 @@ static int __uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
ctrl->info.selector);
return 0;
err_nomem:
kfree(map->menu_names);
kfree(map->menu_mapping);
kfree(map->name);
kfree(map);
return -ENOMEM;
}
int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
@ -2421,8 +2586,7 @@ static void uvc_ctrl_prune_entity(struct uvc_device *dev,
static void uvc_ctrl_init_ctrl(struct uvc_video_chain *chain,
struct uvc_control *ctrl)
{
const struct uvc_control_mapping *mappings;
unsigned int num_mappings;
const struct uvc_control_mapping **mappings;
unsigned int i;
/*
@ -2489,16 +2653,11 @@ static void uvc_ctrl_init_ctrl(struct uvc_video_chain *chain,
}
/* Finally process version-specific mappings. */
if (chain->dev->uvc_version < 0x0150) {
mappings = uvc_ctrl_mappings_uvc11;
num_mappings = ARRAY_SIZE(uvc_ctrl_mappings_uvc11);
} else {
mappings = uvc_ctrl_mappings_uvc15;
num_mappings = ARRAY_SIZE(uvc_ctrl_mappings_uvc15);
}
mappings = chain->dev->uvc_version < 0x0150
? uvc_ctrl_mappings_uvc11 : uvc_ctrl_mappings_uvc15;
for (i = 0; i < num_mappings; ++i) {
const struct uvc_control_mapping *mapping = &mappings[i];
for (i = 0; mappings[i]; ++i) {
const struct uvc_control_mapping *mapping = mappings[i];
if (uvc_entity_match_guid(ctrl->entity, mapping->entity) &&
ctrl->info.selector == mapping->selector)
@ -2591,7 +2750,8 @@ static void uvc_ctrl_cleanup_mappings(struct uvc_device *dev,
list_for_each_entry_safe(mapping, nm, &ctrl->info.mappings, list) {
list_del(&mapping->list);
kfree(mapping->menu_info);
kfree(mapping->menu_names);
kfree(mapping->menu_mapping);
kfree(mapping->name);
kfree(mapping);
}

181
drivers/media/usb/uvc/uvc_driver.c
View file

@ -7,6 +7,7 @@
*/
#include <linux/atomic.h>
#include <linux/bits.h>
#include <linux/gpio/consumer.h>
#include <linux/kernel.h>
#include <linux/list.h>
@ -251,14 +252,10 @@ static int uvc_parse_format(struct uvc_device *dev,
fmtdesc = uvc_format_by_guid(&buffer[5]);
if (fmtdesc != NULL) {
strscpy(format->name, fmtdesc->name,
sizeof(format->name));
format->fcc = fmtdesc->fcc;
} else {
dev_info(&streaming->intf->dev,
"Unknown video format %pUl\n", &buffer[5]);
snprintf(format->name, sizeof(format->name), "%pUl\n",
&buffer[5]);
format->fcc = 0;
}
@ -270,8 +267,6 @@ static int uvc_parse_format(struct uvc_device *dev,
*/
if (dev->quirks & UVC_QUIRK_FORCE_Y8) {
if (format->fcc == V4L2_PIX_FMT_YUYV) {
strscpy(format->name, "Greyscale 8-bit (Y8 )",
sizeof(format->name));
format->fcc = V4L2_PIX_FMT_GREY;
format->bpp = 8;
width_multiplier = 2;
@ -312,7 +307,6 @@ static int uvc_parse_format(struct uvc_device *dev,
return -EINVAL;
}
strscpy(format->name, "MJPEG", sizeof(format->name));
format->fcc = V4L2_PIX_FMT_MJPEG;
format->flags = UVC_FMT_FLAG_COMPRESSED;
format->bpp = 0;
@ -328,17 +322,7 @@ static int uvc_parse_format(struct uvc_device *dev,
return -EINVAL;
}
switch (buffer[8] & 0x7f) {
case 0:
strscpy(format->name, "SD-DV", sizeof(format->name));
break;
case 1:
strscpy(format->name, "SDL-DV", sizeof(format->name));
break;
case 2:
strscpy(format->name, "HD-DV", sizeof(format->name));
break;
default:
if ((buffer[8] & 0x7f) > 2) {
uvc_dbg(dev, DESCR,
"device %d videostreaming interface %d: unknown DV format %u\n",
dev->udev->devnum,
@ -346,9 +330,6 @@ static int uvc_parse_format(struct uvc_device *dev,
return -EINVAL;
}
strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
sizeof(format->name));
format->fcc = V4L2_PIX_FMT_DV;
format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM;
format->bpp = 0;
@ -375,7 +356,7 @@ static int uvc_parse_format(struct uvc_device *dev,
return -EINVAL;
}
uvc_dbg(dev, DESCR, "Found format %s\n", format->name);
uvc_dbg(dev, DESCR, "Found format %p4cc", &format->fcc);
buflen -= buffer[0];
buffer += buffer[0];
@ -732,6 +713,7 @@ static int uvc_parse_streaming(struct uvc_device *dev,
/* Parse the alternate settings to find the maximum bandwidth. */
for (i = 0; i < intf->num_altsetting; ++i) {
struct usb_host_endpoint *ep;
alts = &intf->altsetting[i];
ep = uvc_find_endpoint(alts,
streaming->header.bEndpointAddress);
@ -813,6 +795,27 @@ static struct uvc_entity *uvc_alloc_entity(u16 type, u16 id,
return entity;
}
static void uvc_entity_set_name(struct uvc_device *dev, struct uvc_entity *entity,
const char *type_name, u8 string_id)
{
int ret;
/*
* First attempt to read the entity name from the device. If the entity
* has no associated string, or if reading the string fails (most
* likely due to a buggy firmware), fall back to default names based on
* the entity type.
*/
if (string_id) {
ret = usb_string(dev->udev, string_id, entity->name,
sizeof(entity->name));
if (!ret)
return;
}
sprintf(entity->name, "%s %u", type_name, entity->id);
}
/* Parse vendor-specific extensions. */
static int uvc_parse_vendor_control(struct uvc_device *dev,
const unsigned char *buffer, int buflen)
@ -879,11 +882,7 @@ static int uvc_parse_vendor_control(struct uvc_device *dev,
+ n;
memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
if (buffer[24+p+2*n] != 0)
usb_string(udev, buffer[24+p+2*n], unit->name,
sizeof(unit->name));
else
sprintf(unit->name, "Extension %u", buffer[3]);
uvc_entity_set_name(dev, unit, "Extension", buffer[24+p+2*n]);
list_add_tail(&unit->list, &dev->entities);
handled = 1;
@ -901,6 +900,7 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
struct usb_interface *intf;
struct usb_host_interface *alts = dev->intf->cur_altsetting;
unsigned int i, n, p, len;
const char *type_name;
u16 type;
switch (buffer[2]) {
@ -1006,15 +1006,14 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
memcpy(term->media.bmTransportModes, &buffer[10+n], p);
}
if (buffer[7] != 0)
usb_string(udev, buffer[7], term->name,
sizeof(term->name));
else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA)
sprintf(term->name, "Camera %u", buffer[3]);
if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA)
type_name = "Camera";
else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT)
sprintf(term->name, "Media %u", buffer[3]);
type_name = "Media";
else
sprintf(term->name, "Input %u", buffer[3]);
type_name = "Input";
uvc_entity_set_name(dev, term, type_name, buffer[7]);
list_add_tail(&term->list, &dev->entities);
break;
@ -1047,11 +1046,7 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
memcpy(term->baSourceID, &buffer[7], 1);
if (buffer[8] != 0)
usb_string(udev, buffer[8], term->name,
sizeof(term->name));
else
sprintf(term->name, "Output %u", buffer[3]);
uvc_entity_set_name(dev, term, "Output", buffer[8]);
list_add_tail(&term->list, &dev->entities);
break;
@ -1072,11 +1067,7 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
memcpy(unit->baSourceID, &buffer[5], p);
if (buffer[5+p] != 0)
usb_string(udev, buffer[5+p], unit->name,
sizeof(unit->name));
else
sprintf(unit->name, "Selector %u", buffer[3]);
uvc_entity_set_name(dev, unit, "Selector", buffer[5+p]);
list_add_tail(&unit->list, &dev->entities);
break;
@ -1105,11 +1096,7 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
if (dev->uvc_version >= 0x0110)
unit->processing.bmVideoStandards = buffer[9+n];
if (buffer[8+n] != 0)
usb_string(udev, buffer[8+n], unit->name,
sizeof(unit->name));
else
sprintf(unit->name, "Processing %u", buffer[3]);
uvc_entity_set_name(dev, unit, "Processing", buffer[8+n]);
list_add_tail(&unit->list, &dev->entities);
break;
@ -1136,11 +1123,7 @@ static int uvc_parse_standard_control(struct uvc_device *dev,
unit->extension.bmControls = (u8 *)unit + sizeof(*unit);
memcpy(unit->extension.bmControls, &buffer[23+p], n);
if (buffer[23+p+n] != 0)
usb_string(udev, buffer[23+p+n], unit->name,
sizeof(unit->name));
else
sprintf(unit->name, "Extension %u", buffer[3]);
uvc_entity_set_name(dev, unit, "Extension", buffer[23+p+n]);
list_add_tail(&unit->list, &dev->entities);
break;
@ -1173,7 +1156,8 @@ static int uvc_parse_control(struct uvc_device *dev)
buffer[1] != USB_DT_CS_INTERFACE)
goto next_descriptor;
if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
ret = uvc_parse_standard_control(dev, buffer, buflen);
if (ret < 0)
return ret;
next_descriptor:
@ -1856,12 +1840,14 @@ static void uvc_delete(struct kref *kref)
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);
#ifdef CONFIG_MEDIA_CONTROLLER
uvc_mc_cleanup_entity(entity);
@ -1871,6 +1857,7 @@ static void uvc_delete(struct kref *kref)
list_for_each_safe(p, n, &dev->streams) {
struct uvc_streaming *streaming;
streaming = list_entry(p, struct uvc_streaming, list);
usb_driver_release_interface(&uvc_driver.driver,
streaming->intf);
@ -2206,7 +2193,8 @@ static int uvc_probe(struct usb_interface *intf,
usb_set_intfdata(intf, dev);
/* Initialize the interrupt URB. */
if ((ret = uvc_status_init(dev)) < 0) {
ret = uvc_status_init(dev);
if (ret < 0) {
dev_info(&dev->udev->dev,
"Unable to initialize the status endpoint (%d), status interrupt will not be supported.\n",
ret);
@ -2353,40 +2341,23 @@ static int uvc_clock_param_set(const char *val, const struct kernel_param *kp)
}
module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get,
&uvc_clock_param, S_IRUGO|S_IWUSR);
&uvc_clock_param, 0644);
MODULE_PARM_DESC(clock, "Video buffers timestamp clock");
module_param_named(hwtimestamps, uvc_hw_timestamps_param, uint, S_IRUGO|S_IWUSR);
module_param_named(hwtimestamps, uvc_hw_timestamps_param, uint, 0644);
MODULE_PARM_DESC(hwtimestamps, "Use hardware timestamps");
module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
module_param_named(nodrop, uvc_no_drop_param, uint, 0644);
MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
module_param_named(quirks, uvc_quirks_param, uint, 0644);
MODULE_PARM_DESC(quirks, "Forced device quirks");
module_param_named(trace, uvc_dbg_param, uint, S_IRUGO|S_IWUSR);
module_param_named(trace, uvc_dbg_param, uint, 0644);
MODULE_PARM_DESC(trace, "Trace level bitmask");
module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR);
module_param_named(timeout, uvc_timeout_param, uint, 0644);
MODULE_PARM_DESC(timeout, "Streaming control requests timeout");
/* ------------------------------------------------------------------------
* Driver initialization and cleanup
*/
static const struct uvc_menu_info power_line_frequency_controls_limited[] = {
{ 1, "50 Hz" },
{ 2, "60 Hz" },
};
static const struct uvc_control_mapping uvc_ctrl_power_line_mapping_limited = {
.id = V4L2_CID_POWER_LINE_FREQUENCY,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
.size = 2,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_MENU,
.data_type = UVC_CTRL_DATA_TYPE_ENUM,
.menu_info = power_line_frequency_controls_limited,
.menu_count = ARRAY_SIZE(power_line_frequency_controls_limited),
};
static const struct uvc_device_info uvc_ctrl_power_line_limited = {
.mappings = (const struct uvc_control_mapping *[]) {
&uvc_ctrl_power_line_mapping_limited,
@ -2394,6 +2365,13 @@ static const struct uvc_device_info uvc_ctrl_power_line_limited = {
},
};
static const struct uvc_device_info uvc_ctrl_power_line_uvc11 = {
.mappings = (const struct uvc_control_mapping *[]) {
&uvc_ctrl_power_line_mapping_uvc11,
NULL, /* Sentinel */
},
};
static const struct uvc_device_info uvc_quirk_probe_minmax = {
.quirks = UVC_QUIRK_PROBE_MINMAX,
};
@ -2496,6 +2474,24 @@ static const struct usb_device_id uvc_ids[] = {
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
/* Logitech, Webcam C910 */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x046d,
.idProduct = 0x0821,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = UVC_INFO_QUIRK(UVC_QUIRK_WAKE_AUTOSUSPEND)},
/* Logitech, Webcam B910 */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x046d,
.idProduct = 0x0823,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = UVC_INFO_QUIRK(UVC_QUIRK_WAKE_AUTOSUSPEND)},
/* Logitech Quickcam Fusion */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
@ -2973,6 +2969,15 @@ static const struct usb_device_id uvc_ids[] = {
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = UVC_INFO_QUIRK(UVC_QUIRK_FORCE_BPP) },
/* Lenovo Integrated Camera */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x30c9,
.idProduct = 0x0093,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = UVC_PC_PROTOCOL_15,
.driver_info = (kernel_ulong_t)&uvc_ctrl_power_line_uvc11 },
/* Sonix Technology USB 2.0 Camera */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
@ -2991,6 +2996,24 @@ static const struct usb_device_id uvc_ids[] = {
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_ctrl_power_line_limited },
/* Acer EasyCamera */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x5986,
.idProduct = 0x1180,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_ctrl_power_line_limited },
/* Acer EasyCamera */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = 0x5986,
.idProduct = 0x1180,
.bInterfaceClass = USB_CLASS_VIDEO,
.bInterfaceSubClass = 1,
.bInterfaceProtocol = 0,
.driver_info = (kernel_ulong_t)&uvc_ctrl_power_line_limited },
/* Intel RealSense D4M */
{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE
| USB_DEVICE_ID_MATCH_INT_INFO,

2
drivers/media/usb/uvc/uvc_entity.c
View file

@ -37,7 +37,7 @@ static int uvc_mc_create_links(struct uvc_video_chain *chain,
continue;
remote = uvc_entity_by_id(chain->dev, entity->baSourceID[i]);
if (remote == NULL)
if (remote == NULL || remote->num_pads == 0)
return -EINVAL;
source = (UVC_ENTITY_TYPE(remote) == UVC_TT_STREAMING)

125
drivers/media/usb/uvc/uvc_status.c
View file

@ -6,6 +6,7 @@
* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*/
#include <asm/barrier.h>
#include <linux/kernel.h>
#include <linux/input.h>
#include <linux/slab.h>
@ -18,11 +19,34 @@
* Input device
*/
#ifdef CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV
static bool uvc_input_has_button(struct uvc_device *dev)
{
struct uvc_streaming *stream;
/*
* The device has button events if both bTriggerSupport and
* bTriggerUsage are one. Otherwise the camera button does not
* exist or is handled automatically by the camera without host
* driver or client application intervention.
*/
list_for_each_entry(stream, &dev->streams, list) {
if (stream->header.bTriggerSupport == 1 &&
stream->header.bTriggerUsage == 1)
return true;
}
return false;
}
static int uvc_input_init(struct uvc_device *dev)
{
struct input_dev *input;
int ret;
if (!uvc_input_has_button(dev))
return 0;
input = input_allocate_device();
if (input == NULL)
return -ENOMEM;
@ -73,38 +97,23 @@ static void uvc_input_report_key(struct uvc_device *dev, unsigned int code,
/* --------------------------------------------------------------------------
* Status interrupt endpoint
*/
struct uvc_streaming_status {
u8 bStatusType;
u8 bOriginator;
u8 bEvent;
u8 bValue[];
} __packed;
struct uvc_control_status {
u8 bStatusType;
u8 bOriginator;
u8 bEvent;
u8 bSelector;
u8 bAttribute;
u8 bValue[];
} __packed;
static void uvc_event_streaming(struct uvc_device *dev,
struct uvc_streaming_status *status, int len)
struct uvc_status *status, int len)
{
if (len < 3) {
if (len <= offsetof(struct uvc_status, bEvent)) {
uvc_dbg(dev, STATUS,
"Invalid streaming status event received\n");
return;
}
if (status->bEvent == 0) {
if (len < 4)
if (len <= offsetof(struct uvc_status, streaming))
return;
uvc_dbg(dev, STATUS, "Button (intf %u) %s len %d\n",
status->bOriginator,
status->bValue[0] ? "pressed" : "released", len);
uvc_input_report_key(dev, KEY_CAMERA, status->bValue[0]);
status->streaming.button ? "pressed" : "released", len);
uvc_input_report_key(dev, KEY_CAMERA, status->streaming.button);
} else {
uvc_dbg(dev, STATUS, "Stream %u error event %02x len %d\n",
status->bOriginator, status->bEvent, len);
@ -131,7 +140,7 @@ static struct uvc_control *uvc_event_entity_find_ctrl(struct uvc_entity *entity,
}
static struct uvc_control *uvc_event_find_ctrl(struct uvc_device *dev,
const struct uvc_control_status *status,
const struct uvc_status *status,
struct uvc_video_chain **chain)
{
list_for_each_entry((*chain), &dev->chains, list) {
@ -143,7 +152,7 @@ static struct uvc_control *uvc_event_find_ctrl(struct uvc_device *dev,
continue;
ctrl = uvc_event_entity_find_ctrl(entity,
status->bSelector);
status->control.bSelector);
if (ctrl)
return ctrl;
}
@ -153,7 +162,7 @@ static struct uvc_control *uvc_event_find_ctrl(struct uvc_device *dev,
}
static bool uvc_event_control(struct urb *urb,
const struct uvc_control_status *status, int len)
const struct uvc_status *status, int len)
{
static const char *attrs[] = { "value", "info", "failure", "min", "max" };
struct uvc_device *dev = urb->context;
@ -161,24 +170,24 @@ static bool uvc_event_control(struct urb *urb,
struct uvc_control *ctrl;
if (len < 6 || status->bEvent != 0 ||
status->bAttribute >= ARRAY_SIZE(attrs)) {
status->control.bAttribute >= ARRAY_SIZE(attrs)) {
uvc_dbg(dev, STATUS, "Invalid control status event received\n");
return false;
}
uvc_dbg(dev, STATUS, "Control %u/%u %s change len %d\n",
status->bOriginator, status->bSelector,
attrs[status->bAttribute], len);
status->bOriginator, status->control.bSelector,
attrs[status->control.bAttribute], len);
/* Find the control. */
ctrl = uvc_event_find_ctrl(dev, status, &chain);
if (!ctrl)
return false;
switch (status->bAttribute) {
switch (status->control.bAttribute) {
case UVC_CTRL_VALUE_CHANGE:
return uvc_ctrl_status_event_async(urb, chain, ctrl,
status->bValue);
status->control.bValue);
case UVC_CTRL_INFO_CHANGE:
case UVC_CTRL_FAILURE_CHANGE:
@ -214,28 +223,22 @@ static void uvc_status_complete(struct urb *urb)
len = urb->actual_length;
if (len > 0) {
switch (dev->status[0] & 0x0f) {
switch (dev->status->bStatusType & 0x0f) {
case UVC_STATUS_TYPE_CONTROL: {
struct uvc_control_status *status =
(struct uvc_control_status *)dev->status;
if (uvc_event_control(urb, status, len))
if (uvc_event_control(urb, dev->status, len))
/* The URB will be resubmitted in work context. */
return;
break;
}
case UVC_STATUS_TYPE_STREAMING: {
struct uvc_streaming_status *status =
(struct uvc_streaming_status *)dev->status;
uvc_event_streaming(dev, status, len);
uvc_event_streaming(dev, dev->status, len);
break;
}
default:
uvc_dbg(dev, STATUS, "Unknown status event type %u\n",
dev->status[0]);
dev->status->bStatusType);
break;
}
}
@ -259,12 +262,12 @@ int uvc_status_init(struct uvc_device *dev)
uvc_input_init(dev);
dev->status = kzalloc(UVC_MAX_STATUS_SIZE, GFP_KERNEL);
if (dev->status == NULL)
dev->status = kzalloc(sizeof(*dev->status), GFP_KERNEL);
if (!dev->status)
return -ENOMEM;
dev->int_urb = usb_alloc_urb(0, GFP_KERNEL);
if (dev->int_urb == NULL) {
if (!dev->int_urb) {
kfree(dev->status);
return -ENOMEM;
}
@ -281,7 +284,7 @@ int uvc_status_init(struct uvc_device *dev)
interval = fls(interval) - 1;
usb_fill_int_urb(dev->int_urb, dev->udev, pipe,
dev->status, UVC_MAX_STATUS_SIZE, uvc_status_complete,
dev->status, sizeof(*dev->status), uvc_status_complete,
dev, interval);
return 0;
@ -309,5 +312,41 @@ int uvc_status_start(struct uvc_device *dev, gfp_t flags)
void uvc_status_stop(struct uvc_device *dev)
{
struct uvc_ctrl_work *w = &dev->async_ctrl;
/*
* Prevent the asynchronous control handler from requeing the URB. The
* barrier is needed so the flush_status change is visible to other
* CPUs running the asynchronous handler before usb_kill_urb() is
* called below.
*/
smp_store_release(&dev->flush_status, true);
/*
* Cancel any pending asynchronous work. If any status event was queued,
* process it synchronously.
*/
if (cancel_work_sync(&w->work))
uvc_ctrl_status_event(w->chain, w->ctrl, w->data);
/* Kill the urb. */
usb_kill_urb(dev->int_urb);
/*
* The URB completion handler may have queued asynchronous work. This
* won't resubmit the URB as flush_status is set, but it needs to be
* cancelled before returning or it could then race with a future
* uvc_status_start() call.
*/
if (cancel_work_sync(&w->work))
uvc_ctrl_status_event(w->chain, w->ctrl, w->data);
/*
* From this point, there are no events on the queue and the status URB
* is dead. No events will be queued until uvc_status_start() is called.
* The barrier is needed to make sure that flush_status is visible to
* uvc_ctrl_status_event_work() when uvc_status_start() will be called
* again.
*/
smp_store_release(&dev->flush_status, false);
}

111
drivers/media/usb/uvc/uvc_v4l2.c
View file

@ -6,6 +6,7 @@
* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*/
#include <linux/bits.h>
#include <linux/compat.h>
#include <linux/kernel.h>
#include <linux/list.h>
@ -25,14 +26,84 @@
#include "uvcvideo.h"
static int uvc_control_add_xu_mapping(struct uvc_video_chain *chain,
struct uvc_control_mapping *map,
const struct uvc_xu_control_mapping *xmap)
{
unsigned int i;
size_t size;
int ret;
/*
* Prevent excessive memory consumption, as well as integer
* overflows.
*/
if (xmap->menu_count == 0 ||
xmap->menu_count > UVC_MAX_CONTROL_MENU_ENTRIES)
return -EINVAL;
map->menu_names = NULL;
map->menu_mapping = NULL;
map->menu_mask = BIT_MASK(xmap->menu_count);
size = xmap->menu_count * sizeof(*map->menu_mapping);
map->menu_mapping = kzalloc(size, GFP_KERNEL);
if (!map->menu_mapping) {
ret = -ENOMEM;
goto done;
}
for (i = 0; i < xmap->menu_count ; i++) {
if (copy_from_user((u32 *)&map->menu_mapping[i],
&xmap->menu_info[i].value,
sizeof(map->menu_mapping[i]))) {
ret = -EACCES;
goto done;
}
}
/*
* Always use the standard naming if available, otherwise copy the
* names supplied by userspace.
*/
if (!v4l2_ctrl_get_menu(map->id)) {
size = xmap->menu_count * sizeof(map->menu_names[0]);
map->menu_names = kzalloc(size, GFP_KERNEL);
if (!map->menu_names) {
ret = -ENOMEM;
goto done;
}
for (i = 0; i < xmap->menu_count ; i++) {
/* sizeof(names[i]) - 1: to take care of \0 */
if (copy_from_user((char *)map->menu_names[i],
xmap->menu_info[i].name,
sizeof(map->menu_names[i]) - 1)) {
ret = -EACCES;
goto done;
}
}
}
ret = uvc_ctrl_add_mapping(chain, map);
done:
kfree(map->menu_names);
map->menu_names = NULL;
kfree(map->menu_mapping);
map->menu_mapping = NULL;
return ret;
}
/* ------------------------------------------------------------------------
* UVC ioctls
*/
static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain,
struct uvc_xu_control_mapping *xmap)
static int uvc_ioctl_xu_ctrl_map(struct uvc_video_chain *chain,
struct uvc_xu_control_mapping *xmap)
{
struct uvc_control_mapping *map;
unsigned int size;
int ret;
map = kzalloc(sizeof(*map), GFP_KERNEL);
@ -60,39 +131,20 @@ static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain,
case V4L2_CTRL_TYPE_INTEGER:
case V4L2_CTRL_TYPE_BOOLEAN:
case V4L2_CTRL_TYPE_BUTTON:
ret = uvc_ctrl_add_mapping(chain, map);
break;
case V4L2_CTRL_TYPE_MENU:
/*
* Prevent excessive memory consumption, as well as integer
* overflows.
*/
if (xmap->menu_count == 0 ||
xmap->menu_count > UVC_MAX_CONTROL_MENU_ENTRIES) {
ret = -EINVAL;
goto free_map;
}
size = xmap->menu_count * sizeof(*map->menu_info);
map->menu_info = memdup_user(xmap->menu_info, size);
if (IS_ERR(map->menu_info)) {
ret = PTR_ERR(map->menu_info);
goto free_map;
}
map->menu_count = xmap->menu_count;
ret = uvc_control_add_xu_mapping(chain, map, xmap);
break;
default:
uvc_dbg(chain->dev, CONTROL,
"Unsupported V4L2 control type %u\n", xmap->v4l2_type);
ret = -ENOTTY;
goto free_map;
break;
}
ret = uvc_ctrl_add_mapping(chain, map);
kfree(map->menu_info);
free_map:
kfree(map);
@ -660,8 +712,6 @@ static int uvc_ioctl_enum_fmt(struct uvc_streaming *stream,
fmt->flags = 0;
if (format->flags & UVC_FMT_FLAG_COMPRESSED)
fmt->flags |= V4L2_FMT_FLAG_COMPRESSED;
strscpy(fmt->description, format->name, sizeof(fmt->description));
fmt->description[sizeof(fmt->description) - 1] = 0;
fmt->pixelformat = format->fcc;
return 0;
}
@ -1020,8 +1070,7 @@ static int uvc_ctrl_check_access(struct uvc_video_chain *chain,
int ret = 0;
for (i = 0; i < ctrls->count; ++ctrl, ++i) {
ret = uvc_ctrl_is_accessible(chain, ctrl->id,
ioctl == VIDIOC_G_EXT_CTRLS);
ret = uvc_ctrl_is_accessible(chain, ctrl->id, ctrls, ioctl);
if (ret)
break;
}
@ -1316,7 +1365,7 @@ static long uvc_ioctl_default(struct file *file, void *fh, bool valid_prio,
switch (cmd) {
/* Dynamic controls. */
case UVCIOC_CTRL_MAP:
return uvc_ioctl_ctrl_map(chain, arg);
return uvc_ioctl_xu_ctrl_map(chain, arg);
case UVCIOC_CTRL_QUERY:
return uvc_xu_ctrl_query(chain, arg);
@ -1429,7 +1478,7 @@ static long uvc_v4l2_compat_ioctl32(struct file *file,
ret = uvc_v4l2_get_xu_mapping(&karg.xmap, up);
if (ret)
return ret;
ret = uvc_ioctl_ctrl_map(handle->chain, &karg.xmap);
ret = uvc_ioctl_xu_ctrl_map(handle->chain, &karg.xmap);
if (ret)
return ret;
ret = uvc_v4l2_put_xu_mapping(&karg.xmap, up);

58
drivers/media/usb/uvc/uvc_video.c
View file

@ -79,13 +79,14 @@ int uvc_query_ctrl(struct uvc_device *dev, u8 query, u8 unit,
if (likely(ret == size))
return 0;
dev_err(&dev->udev->dev,
"Failed to query (%s) UVC control %u on unit %u: %d (exp. %u).\n",
uvc_query_name(query), cs, unit, ret, size);
if (ret != -EPIPE)
return ret;
if (ret != -EPIPE) {
dev_err(&dev->udev->dev,
"Failed to query (%s) UVC control %u on unit %u: %d (exp. %u).\n",
uvc_query_name(query), cs, unit, ret, size);
return ret < 0 ? ret : -EPIPE;
}
/* Reuse data[0] to request the error code. */
tmp = *(u8 *)data;
ret = __uvc_query_ctrl(dev, UVC_GET_CUR, 0, intfnum,
@ -107,7 +108,7 @@ int uvc_query_ctrl(struct uvc_device *dev, u8 query, u8 unit,
case 1: /* Not ready */
return -EBUSY;
case 2: /* Wrong state */
return -EILSEQ;
return -EACCES;
case 3: /* Power */
return -EREMOTE;
case 4: /* Out of range */
@ -129,12 +130,13 @@ int uvc_query_ctrl(struct uvc_device *dev, u8 query, u8 unit,
return -EPIPE;
}
static const struct usb_device_id elgato_cam_link_4k = {
USB_DEVICE(0x0fd9, 0x0066)
};
static void uvc_fixup_video_ctrl(struct uvc_streaming *stream,
struct uvc_streaming_control *ctrl)
{
static const struct usb_device_id elgato_cam_link_4k = {
USB_DEVICE(0x0fd9, 0x0066)
};
struct uvc_format *format = NULL;
struct uvc_frame *frame = NULL;
unsigned int i;
@ -297,7 +299,7 @@ static int uvc_get_video_ctrl(struct uvc_streaming *stream,
dev_err(&stream->intf->dev,
"Failed to query (%u) UVC %s control : %d (exp. %u).\n",
query, probe ? "probe" : "commit", ret, size);
ret = -EIO;
ret = (ret == -EPROTO) ? -EPROTO : -EIO;
goto out;
}
@ -516,7 +518,9 @@ uvc_video_clock_decode(struct uvc_streaming *stream, struct uvc_buffer *buf,
/*
* To limit the amount of data, drop SCRs with an SOF identical to the
* previous one.
* previous one. This filtering is also needed to support UVC 1.5, where
* all the data packets of the same frame contains the same SOF. In that
* case only the first one will match the host_sof.
*/
dev_sof = get_unaligned_le16(&data[header_size - 2]);
if (dev_sof == stream->clock.last_sof)
@ -1352,7 +1356,9 @@ static void uvc_video_decode_meta(struct uvc_streaming *stream,
if (has_scr)
memcpy(stream->clock.last_scr, scr, 6);
memcpy(&meta->length, mem, length);
meta->length = mem[0];
meta->flags = mem[1];
memcpy(meta->buf, &mem[2], length - 2);
meta_buf->bytesused += length + sizeof(meta->ns) + sizeof(meta->sof);
uvc_dbg(stream->dev, FRAME,
@ -1965,6 +1971,17 @@ static int uvc_video_start_transfer(struct uvc_streaming *stream,
"Selecting alternate setting %u (%u B/frame bandwidth)\n",
altsetting, best_psize);
/*
* Some devices, namely the Logitech C910 and B910, are unable
* to recover from a USB autosuspend, unless the alternate
* setting of the streaming interface is toggled.
*/
if (stream->dev->quirks & UVC_QUIRK_WAKE_AUTOSUSPEND) {
usb_set_interface(stream->dev->udev, intfnum,
altsetting);
usb_set_interface(stream->dev->udev, intfnum, 0);
}
ret = usb_set_interface(stream->dev->udev, intfnum, altsetting);
if (ret < 0)
return ret;
@ -2121,6 +2138,21 @@ int uvc_video_init(struct uvc_streaming *stream)
* request on the probe control, as required by the UVC specification.
*/
ret = uvc_get_video_ctrl(stream, probe, 1, UVC_GET_CUR);
/*
* Elgato Cam Link 4k can be in a stalled state if the resolution of
* the external source has changed while the firmware initializes.
* Once in this state, the device is useless until it receives a
* USB reset. It has even been observed that the stalled state will
* continue even after unplugging the device.
*/
if (ret == -EPROTO &&
usb_match_one_id(stream->dev->intf, &elgato_cam_link_4k)) {
dev_err(&stream->intf->dev, "Elgato Cam Link 4K firmware crash detected\n");
dev_err(&stream->intf->dev, "Resetting the device, unplug and replug to recover\n");
usb_reset_device(stream->dev->udev);
}
if (ret < 0)
return ret;

39
drivers/media/usb/uvc/uvcvideo.h
View file

@ -51,8 +51,6 @@
#define UVC_URBS 5
/* Maximum number of packets per URB. */
#define UVC_MAX_PACKETS 32
/* Maximum status buffer size in bytes of interrupt URB. */
#define UVC_MAX_STATUS_SIZE 16
#define UVC_CTRL_CONTROL_TIMEOUT 5000
#define UVC_CTRL_STREAMING_TIMEOUT 5000
@ -74,6 +72,7 @@
#define UVC_QUIRK_RESTORE_CTRLS_ON_INIT 0x00000400
#define UVC_QUIRK_FORCE_Y8 0x00000800
#define UVC_QUIRK_FORCE_BPP 0x00001000
#define UVC_QUIRK_WAKE_AUTOSUSPEND 0x00002000
/* Format flags */
#define UVC_FMT_FLAG_COMPRESSED 0x00000001
@ -116,8 +115,9 @@ struct uvc_control_mapping {
enum v4l2_ctrl_type v4l2_type;
u32 data_type;
const struct uvc_menu_info *menu_info;
u32 menu_count;
const u32 *menu_mapping;
const char (*menu_names)[UVC_MENU_NAME_LEN];
unsigned long menu_mask;
u32 master_id;
s32 master_manual;
@ -264,8 +264,6 @@ struct uvc_format {
u32 fcc;
u32 flags;
char name[32];
unsigned int nframes;
struct uvc_frame *frame;
};
@ -527,6 +525,26 @@ struct uvc_device_info {
const struct uvc_control_mapping **mappings;
};
struct uvc_status_streaming {
u8 button;
} __packed;
struct uvc_status_control {
u8 bSelector;
u8 bAttribute;
u8 bValue[11];
} __packed;
struct uvc_status {
u8 bStatusType;
u8 bOriginator;
u8 bEvent;
union {
struct uvc_status_control control;
struct uvc_status_streaming streaming;
};
} __packed;
struct uvc_device {
struct usb_device *udev;
struct usb_interface *intf;
@ -559,7 +577,9 @@ struct uvc_device {
/* Status Interrupt Endpoint */
struct usb_host_endpoint *int_ep;
struct urb *int_urb;
u8 *status;
struct uvc_status *status;
bool flush_status;
struct input_dev *input;
char input_phys[64];
@ -728,6 +748,8 @@ int uvc_status_start(struct uvc_device *dev, gfp_t flags);
void uvc_status_stop(struct uvc_device *dev);
/* Controls */
extern const struct uvc_control_mapping uvc_ctrl_power_line_mapping_limited;
extern const struct uvc_control_mapping uvc_ctrl_power_line_mapping_uvc11;
extern const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops;
int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
@ -761,7 +783,8 @@ static inline int uvc_ctrl_rollback(struct uvc_fh *handle)
int uvc_ctrl_get(struct uvc_video_chain *chain, struct v4l2_ext_control *xctrl);
int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl);
int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id,
bool read);
const struct v4l2_ext_controls *ctrls,
unsigned long ioctl);
int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
struct uvc_xu_control_query *xqry);

6
include/uapi/linux/uvcvideo.h
View file

@ -36,9 +36,11 @@
UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES | \
UVC_CTRL_FLAG_GET_DEF)
#define UVC_MENU_NAME_LEN 32
struct uvc_menu_info {
__u32 value;
__u8 name[32];
__u8 name[UVC_MENU_NAME_LEN];
};
struct uvc_xu_control_mapping {
@ -86,7 +88,7 @@ struct uvc_xu_control_query {
* struct. The first two fields are added by the driver, they can be used for
* clock synchronisation. The rest is an exact copy of a UVC payload header.
* Only complete objects with complete buffers are included. Therefore it's
* always sizeof(meta->ts) + sizeof(meta->sof) + meta->length bytes large.
* always sizeof(meta->ns) + sizeof(meta->sof) + meta->length bytes large.
*/
struct uvc_meta_buf {
__u64 ns;