/*
* uvc_ctrl.c -- USB Video Class driver - Controls
*
- * Copyright (C) 2005-2009
- * Laurent Pinchart (laurent.pinchart@skynet.be)
+ * Copyright (C) 2005-2010
+ * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
static inline __u8 *uvc_ctrl_data(struct uvc_control *ctrl, int id)
{
- return ctrl->uvc_data + id * ctrl->info->size;
+ return ctrl->uvc_data + id * ctrl->info.size;
}
static inline int uvc_test_bit(const __u8 *data, int bit)
static const __u8 uvc_media_transport_input_guid[16] =
UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT;
-static int uvc_entity_match_guid(struct uvc_entity *entity, __u8 guid[16])
+static int uvc_entity_match_guid(const struct uvc_entity *entity,
+ const __u8 guid[16])
{
switch (UVC_ENTITY_TYPE(entity)) {
case UVC_ITT_CAMERA:
for (i = 0; i < entity->ncontrols; ++i) {
ctrl = &entity->controls[i];
- if (ctrl->info == NULL)
+ if (!ctrl->initialized)
continue;
- list_for_each_entry(map, &ctrl->info->mappings, list) {
+ list_for_each_entry(map, &ctrl->info.mappings, list) {
if ((map->id == v4l2_id) && !next) {
*control = ctrl;
*mapping = map;
}
}
-struct uvc_control *uvc_find_control(struct uvc_video_chain *chain,
+static struct uvc_control *uvc_find_control(struct uvc_video_chain *chain,
__u32 v4l2_id, struct uvc_control_mapping **mapping)
{
struct uvc_control *ctrl = NULL;
{
int ret;
- if (ctrl->info->flags & UVC_CONTROL_GET_DEF) {
+ if (ctrl->info.flags & UVC_CONTROL_GET_DEF) {
ret = uvc_query_ctrl(chain->dev, UVC_GET_DEF, ctrl->entity->id,
- chain->dev->intfnum, ctrl->info->selector,
+ chain->dev->intfnum, ctrl->info.selector,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF),
- ctrl->info->size);
+ ctrl->info.size);
if (ret < 0)
return ret;
}
- if (ctrl->info->flags & UVC_CONTROL_GET_MIN) {
+ if (ctrl->info.flags & UVC_CONTROL_GET_MIN) {
ret = uvc_query_ctrl(chain->dev, UVC_GET_MIN, ctrl->entity->id,
- chain->dev->intfnum, ctrl->info->selector,
+ chain->dev->intfnum, ctrl->info.selector,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN),
- ctrl->info->size);
+ ctrl->info.size);
if (ret < 0)
return ret;
}
- if (ctrl->info->flags & UVC_CONTROL_GET_MAX) {
+ if (ctrl->info.flags & UVC_CONTROL_GET_MAX) {
ret = uvc_query_ctrl(chain->dev, UVC_GET_MAX, ctrl->entity->id,
- chain->dev->intfnum, ctrl->info->selector,
+ chain->dev->intfnum, ctrl->info.selector,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX),
- ctrl->info->size);
+ ctrl->info.size);
if (ret < 0)
return ret;
}
- if (ctrl->info->flags & UVC_CONTROL_GET_RES) {
+ if (ctrl->info.flags & UVC_CONTROL_GET_RES) {
ret = uvc_query_ctrl(chain->dev, UVC_GET_RES, ctrl->entity->id,
- chain->dev->intfnum, ctrl->info->selector,
+ chain->dev->intfnum, ctrl->info.selector,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES),
- ctrl->info->size);
+ ctrl->info.size);
if (ret < 0)
return ret;
}
unsigned int i;
int ret;
+ ret = mutex_lock_interruptible(&chain->ctrl_mutex);
+ if (ret < 0)
+ return -ERESTARTSYS;
+
ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping);
- if (ctrl == NULL)
- return -EINVAL;
+ if (ctrl == NULL) {
+ ret = -EINVAL;
+ goto done;
+ }
memset(v4l2_ctrl, 0, sizeof *v4l2_ctrl);
v4l2_ctrl->id = mapping->id;
strlcpy(v4l2_ctrl->name, mapping->name, sizeof v4l2_ctrl->name);
v4l2_ctrl->flags = 0;
- if (!(ctrl->info->flags & UVC_CONTROL_GET_CUR))
+ if (!(ctrl->info.flags & UVC_CONTROL_GET_CUR))
v4l2_ctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
- if (!(ctrl->info->flags & UVC_CONTROL_SET_CUR))
+ if (!(ctrl->info.flags & UVC_CONTROL_SET_CUR))
v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
if (!ctrl->cached) {
ret = uvc_ctrl_populate_cache(chain, ctrl);
if (ret < 0)
- return ret;
+ goto done;
}
- if (ctrl->info->flags & UVC_CONTROL_GET_DEF) {
+ if (ctrl->info.flags & UVC_CONTROL_GET_DEF) {
v4l2_ctrl->default_value = mapping->get(mapping, UVC_GET_DEF,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF));
}
}
}
- return 0;
+ goto done;
case V4L2_CTRL_TYPE_BOOLEAN:
v4l2_ctrl->minimum = 0;
v4l2_ctrl->maximum = 1;
v4l2_ctrl->step = 1;
- return 0;
+ goto done;
case V4L2_CTRL_TYPE_BUTTON:
v4l2_ctrl->minimum = 0;
v4l2_ctrl->maximum = 0;
v4l2_ctrl->step = 0;
- return 0;
+ goto done;
default:
break;
}
- if (ctrl->info->flags & UVC_CONTROL_GET_MIN)
+ if (ctrl->info.flags & UVC_CONTROL_GET_MIN)
v4l2_ctrl->minimum = mapping->get(mapping, UVC_GET_MIN,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN));
- if (ctrl->info->flags & UVC_CONTROL_GET_MAX)
+ if (ctrl->info.flags & UVC_CONTROL_GET_MAX)
v4l2_ctrl->maximum = mapping->get(mapping, UVC_GET_MAX,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX));
- if (ctrl->info->flags & UVC_CONTROL_GET_RES)
+ if (ctrl->info.flags & UVC_CONTROL_GET_RES)
v4l2_ctrl->step = mapping->get(mapping, UVC_GET_RES,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES));
- return 0;
+done:
+ mutex_unlock(&chain->ctrl_mutex);
+ return ret;
+}
+
+/*
+ * Mapping V4L2 controls to UVC controls can be straighforward if done well.
+ * Most of the UVC controls exist in V4L2, and can be mapped directly. Some
+ * must be grouped (for instance the Red Balance, Blue Balance and Do White
+ * Balance V4L2 controls use the White Balance Component UVC control) or
+ * otherwise translated. The approach we take here is to use a translation
+ * table for the controls that can be mapped directly, and handle the others
+ * manually.
+ */
+int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
+ struct v4l2_querymenu *query_menu)
+{
+ 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;
+ int ret;
+
+ memset(query_menu, 0, sizeof(*query_menu));
+ query_menu->id = id;
+ query_menu->index = index;
+
+ ret = mutex_lock_interruptible(&chain->ctrl_mutex);
+ if (ret < 0)
+ return -ERESTARTSYS;
+
+ ctrl = uvc_find_control(chain, query_menu->id, &mapping);
+ if (ctrl == NULL || mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ if (query_menu->index >= mapping->menu_count) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ menu_info = &mapping->menu_info[query_menu->index];
+ strlcpy(query_menu->name, menu_info->name, sizeof query_menu->name);
+
+done:
+ mutex_unlock(&chain->ctrl_mutex);
+ return ret;
}
for (i = 0; i < entity->ncontrols; ++i) {
ctrl = &entity->controls[i];
- if (ctrl->info == NULL)
+ if (!ctrl->initialized)
continue;
/* Reset the loaded flag for auto-update controls that were
* marked as loaded in uvc_ctrl_get/uvc_ctrl_set to prevent
* uvc_ctrl_get from using the cached value.
*/
- if (ctrl->info->flags & UVC_CONTROL_AUTO_UPDATE)
+ if (ctrl->info.flags & UVC_CONTROL_AUTO_UPDATE)
ctrl->loaded = 0;
if (!ctrl->dirty)
if (!rollback)
ret = uvc_query_ctrl(dev, UVC_SET_CUR, ctrl->entity->id,
- dev->intfnum, ctrl->info->selector,
+ dev->intfnum, ctrl->info.selector,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
- ctrl->info->size);
+ ctrl->info.size);
else
ret = 0;
if (rollback || ret < 0)
memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP),
- ctrl->info->size);
+ ctrl->info.size);
ctrl->dirty = 0;
int ret;
ctrl = uvc_find_control(chain, xctrl->id, &mapping);
- if (ctrl == NULL || (ctrl->info->flags & UVC_CONTROL_GET_CUR) == 0)
+ if (ctrl == NULL || (ctrl->info.flags & UVC_CONTROL_GET_CUR) == 0)
return -EINVAL;
if (!ctrl->loaded) {
ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, ctrl->entity->id,
- chain->dev->intfnum, ctrl->info->selector,
+ chain->dev->intfnum, ctrl->info.selector,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
- ctrl->info->size);
+ ctrl->info.size);
if (ret < 0)
return ret;
int ret;
ctrl = uvc_find_control(chain, xctrl->id, &mapping);
- if (ctrl == NULL || (ctrl->info->flags & UVC_CONTROL_SET_CUR) == 0)
+ if (ctrl == NULL || (ctrl->info.flags & UVC_CONTROL_SET_CUR) == 0)
return -EINVAL;
/* Clamp out of range values. */
* needs to be loaded from the device to perform the read-modify-write
* operation.
*/
- if (!ctrl->loaded && (ctrl->info->size * 8) != mapping->size) {
- if ((ctrl->info->flags & UVC_CONTROL_GET_CUR) == 0) {
+ if (!ctrl->loaded && (ctrl->info.size * 8) != mapping->size) {
+ if ((ctrl->info.flags & UVC_CONTROL_GET_CUR) == 0) {
memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
- 0, ctrl->info->size);
+ 0, ctrl->info.size);
} else {
ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR,
ctrl->entity->id, chain->dev->intfnum,
- ctrl->info->selector,
+ ctrl->info.selector,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
- ctrl->info->size);
+ ctrl->info.size);
if (ret < 0)
return ret;
}
if (!ctrl->dirty) {
memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP),
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
- ctrl->info->size);
+ ctrl->info.size);
}
mapping->set(mapping, value,
* Dynamic controls
*/
+static void uvc_ctrl_fixup_xu_info(struct uvc_device *dev,
+ const struct uvc_control *ctrl, struct uvc_control_info *info)
+{
+ struct uvc_ctrl_fixup {
+ struct usb_device_id id;
+ u8 entity;
+ u8 selector;
+ u8 flags;
+ };
+
+ static const struct uvc_ctrl_fixup fixups[] = {
+ { { USB_DEVICE(0x046d, 0x08c2) }, 9, 1,
+ UVC_CONTROL_GET_MIN | UVC_CONTROL_GET_MAX |
+ UVC_CONTROL_GET_DEF | UVC_CONTROL_SET_CUR |
+ UVC_CONTROL_AUTO_UPDATE },
+ { { USB_DEVICE(0x046d, 0x08cc) }, 9, 1,
+ UVC_CONTROL_GET_MIN | UVC_CONTROL_GET_MAX |
+ UVC_CONTROL_GET_DEF | UVC_CONTROL_SET_CUR |
+ UVC_CONTROL_AUTO_UPDATE },
+ { { USB_DEVICE(0x046d, 0x0994) }, 9, 1,
+ UVC_CONTROL_GET_MIN | UVC_CONTROL_GET_MAX |
+ UVC_CONTROL_GET_DEF | UVC_CONTROL_SET_CUR |
+ UVC_CONTROL_AUTO_UPDATE },
+ };
+
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(fixups); ++i) {
+ if (!usb_match_one_id(dev->intf, &fixups[i].id))
+ continue;
+
+ if (fixups[i].entity == ctrl->entity->id &&
+ fixups[i].selector == info->selector) {
+ info->flags = fixups[i].flags;
+ return;
+ }
+ }
+}
+
+/*
+ * Query control information (size and flags) for XU controls.
+ */
+static int uvc_ctrl_fill_xu_info(struct uvc_device *dev,
+ const struct uvc_control *ctrl, struct uvc_control_info *info)
+{
+ u8 *data;
+ int ret;
+
+ data = kmalloc(2, GFP_KERNEL);
+ if (data == NULL)
+ return -ENOMEM;
+
+ memcpy(info->entity, ctrl->entity->extension.guidExtensionCode,
+ sizeof(info->entity));
+ info->index = ctrl->index;
+ info->selector = ctrl->index + 1;
+
+ /* Query and verify the control length (GET_LEN) */
+ ret = uvc_query_ctrl(dev, UVC_GET_LEN, ctrl->entity->id, dev->intfnum,
+ info->selector, data, 2);
+ if (ret < 0) {
+ uvc_trace(UVC_TRACE_CONTROL,
+ "GET_LEN failed on control %pUl/%u (%d).\n",
+ info->entity, info->selector, ret);
+ goto done;
+ }
+
+ info->size = le16_to_cpup((__le16 *)data);
+
+ /* Query the control information (GET_INFO) */
+ ret = uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id, dev->intfnum,
+ info->selector, data, 1);
+ if (ret < 0) {
+ uvc_trace(UVC_TRACE_CONTROL,
+ "GET_INFO failed on control %pUl/%u (%d).\n",
+ info->entity, info->selector, ret);
+ goto done;
+ }
+
+ info->flags = UVC_CONTROL_GET_MIN | UVC_CONTROL_GET_MAX
+ | UVC_CONTROL_GET_RES | UVC_CONTROL_GET_DEF
+ | (data[0] & UVC_CONTROL_CAP_GET ? UVC_CONTROL_GET_CUR : 0)
+ | (data[0] & UVC_CONTROL_CAP_SET ? UVC_CONTROL_SET_CUR : 0)
+ | (data[0] & UVC_CONTROL_CAP_AUTOUPDATE ?
+ UVC_CONTROL_AUTO_UPDATE : 0);
+
+ uvc_ctrl_fixup_xu_info(dev, ctrl, info);
+
+ uvc_trace(UVC_TRACE_CONTROL, "XU control %pUl/%u queried: len %u, "
+ "flags { get %u set %u auto %u }.\n",
+ info->entity, info->selector, info->size,
+ (info->flags & UVC_CONTROL_GET_CUR) ? 1 : 0,
+ (info->flags & UVC_CONTROL_SET_CUR) ? 1 : 0,
+ (info->flags & UVC_CONTROL_AUTO_UPDATE) ? 1 : 0);
+
+done:
+ kfree(data);
+ return ret;
+}
+
+static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl,
+ const struct uvc_control_info *info);
+
+static int uvc_ctrl_init_xu_ctrl(struct uvc_device *dev,
+ struct uvc_control *ctrl)
+{
+ struct uvc_control_info info;
+ int ret;
+
+ if (ctrl->initialized)
+ return 0;
+
+ ret = uvc_ctrl_fill_xu_info(dev, ctrl, &info);
+ if (ret < 0)
+ return ret;
+
+ ret = uvc_ctrl_add_info(dev, ctrl, &info);
+ if (ret < 0)
+ uvc_trace(UVC_TRACE_CONTROL, "Failed to initialize control "
+ "%pUl/%u on device %s entity %u\n", info.entity,
+ info.selector, dev->udev->devpath, ctrl->entity->id);
+
+ return ret;
+}
+
int uvc_xu_ctrl_query(struct uvc_video_chain *chain,
struct uvc_xu_control *xctrl, int set)
{
struct uvc_entity *entity;
struct uvc_control *ctrl = NULL;
unsigned int i, found = 0;
+ int restore = 0;
__u8 *data;
int ret;
return -EINVAL;
}
- /* Find the control. */
+ /* Find the control and perform delayed initialization if needed. */
for (i = 0; i < entity->ncontrols; ++i) {
ctrl = &entity->controls[i];
- if (ctrl->info == NULL)
- continue;
-
- if (ctrl->info->selector == xctrl->selector) {
+ if (ctrl->index == xctrl->selector - 1) {
found = 1;
break;
}
return -EINVAL;
}
- /* Validate control data size. */
- if (ctrl->info->size != xctrl->size)
- return -EINVAL;
-
- if ((set && !(ctrl->info->flags & UVC_CONTROL_SET_CUR)) ||
- (!set && !(ctrl->info->flags & UVC_CONTROL_GET_CUR)))
- return -EINVAL;
-
if (mutex_lock_interruptible(&chain->ctrl_mutex))
return -ERESTARTSYS;
+ ret = uvc_ctrl_init_xu_ctrl(chain->dev, ctrl);
+ if (ret < 0) {
+ ret = -ENOENT;
+ goto done;
+ }
+
+ /* Validate control data size. */
+ if (ctrl->info.size != xctrl->size) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ if ((set && !(ctrl->info.flags & UVC_CONTROL_SET_CUR)) ||
+ (!set && !(ctrl->info.flags & UVC_CONTROL_GET_CUR))) {
+ ret = -EINVAL;
+ goto done;
+ }
+
memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP),
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
- xctrl->size);
+ ctrl->info.size);
data = uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT);
+ restore = set;
if (set && copy_from_user(data, xctrl->data, xctrl->size)) {
ret = -EFAULT;
- goto out;
+ goto done;
}
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;
+ goto done;
- if (!set && copy_to_user(xctrl->data, data, xctrl->size)) {
+ if (!set && copy_to_user(xctrl->data, data, xctrl->size))
ret = -EFAULT;
- goto out;
- }
-
-out:
- if (ret)
+done:
+ if (ret && restore)
memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP),
xctrl->size);
for (i = 0; i < entity->ncontrols; ++i) {
ctrl = &entity->controls[i];
- if (ctrl->info == NULL || !ctrl->modified ||
- (ctrl->info->flags & UVC_CONTROL_RESTORE) == 0)
+ if (!ctrl->initialized || !ctrl->modified ||
+ (ctrl->info.flags & UVC_CONTROL_RESTORE) == 0)
continue;
printk(KERN_INFO "restoring control %pUl/%u/%u\n",
- ctrl->info->entity, ctrl->info->index,
- ctrl->info->selector);
+ ctrl->info.entity, ctrl->info.index,
+ ctrl->info.selector);
ctrl->dirty = 1;
}
* Control and mapping handling
*/
-static int uvc_ctrl_add_ctrl(struct uvc_device *dev,
- struct uvc_control_info *info)
+/*
+ * Add control information to a given control.
+ */
+static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl,
+ const struct uvc_control_info *info)
{
- struct uvc_entity *entity;
- struct uvc_control *ctrl = NULL;
- int ret = 0, found = 0;
- unsigned int i;
- u8 *uvc_info;
- u8 *uvc_data;
-
- list_for_each_entry(entity, &dev->entities, list) {
- if (!uvc_entity_match_guid(entity, info->entity))
- continue;
-
- for (i = 0; i < entity->ncontrols; ++i) {
- ctrl = &entity->controls[i];
- if (ctrl->index == info->index) {
- found = 1;
- break;
- }
- }
-
- if (found)
- break;
- }
-
- if (!found)
- return 0;
-
- uvc_data = kmalloc(info->size * UVC_CTRL_DATA_LAST + 1, GFP_KERNEL);
- if (uvc_data == NULL)
- return -ENOMEM;
-
- uvc_info = uvc_data + info->size * UVC_CTRL_DATA_LAST;
-
- if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT) {
- /* Check if the device control information and length match
- * the user supplied information.
- */
- ret = uvc_query_ctrl(dev, UVC_GET_LEN, ctrl->entity->id,
- dev->intfnum, info->selector, uvc_data, 2);
- if (ret < 0) {
- uvc_trace(UVC_TRACE_CONTROL,
- "GET_LEN failed on control %pUl/%u (%d).\n",
- info->entity, info->selector, ret);
- goto done;
- }
-
- if (info->size != le16_to_cpu(*(__le16 *)uvc_data)) {
- uvc_trace(UVC_TRACE_CONTROL, "Control %pUl/%u size "
- "doesn't match user supplied value.\n",
- info->entity, info->selector);
- ret = -EINVAL;
- goto done;
- }
+ int ret = 0;
- ret = uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id,
- dev->intfnum, info->selector, uvc_info, 1);
- if (ret < 0) {
- uvc_trace(UVC_TRACE_CONTROL,
- "GET_INFO failed on control %pUl/%u (%d).\n",
- info->entity, info->selector, ret);
- goto done;
- }
+ memcpy(&ctrl->info, info, sizeof(*info));
+ INIT_LIST_HEAD(&ctrl->info.mappings);
- if (((info->flags & UVC_CONTROL_GET_CUR) &&
- !(*uvc_info & UVC_CONTROL_CAP_GET)) ||
- ((info->flags & UVC_CONTROL_SET_CUR) &&
- !(*uvc_info & UVC_CONTROL_CAP_SET))) {
- uvc_trace(UVC_TRACE_CONTROL, "Control %pUl/%u flags "
- "don't match supported operations.\n",
- info->entity, info->selector);
- ret = -EINVAL;
- goto done;
- }
+ /* Allocate an array to save control values (cur, def, max, etc.) */
+ ctrl->uvc_data = kzalloc(ctrl->info.size * UVC_CTRL_DATA_LAST + 1,
+ GFP_KERNEL);
+ if (ctrl->uvc_data == NULL) {
+ ret = -ENOMEM;
+ goto done;
}
- ctrl->info = info;
- ctrl->uvc_data = uvc_data;
- ctrl->uvc_info = uvc_info;
+ ctrl->initialized = 1;
uvc_trace(UVC_TRACE_CONTROL, "Added control %pUl/%u to device %s "
- "entity %u\n", ctrl->info->entity, ctrl->info->selector,
- dev->udev->devpath, entity->id);
+ "entity %u\n", ctrl->info.entity, ctrl->info.selector,
+ dev->udev->devpath, ctrl->entity->id);
done:
if (ret < 0)
- kfree(uvc_data);
-
+ kfree(ctrl->uvc_data);
return ret;
}
/*
- * Add an item to the UVC control information list, and instantiate a control
- * structure for each device that supports the control.
+ * Add a control mapping to a given control.
*/
-int uvc_ctrl_add_info(struct uvc_control_info *info)
+static int __uvc_ctrl_add_mapping(struct uvc_device *dev,
+ struct uvc_control *ctrl, const struct uvc_control_mapping *mapping)
{
- struct uvc_control_info *ctrl;
- struct uvc_device *dev;
- int ret = 0;
-
- /* Find matching controls by walking the devices, entities and
- * controls list.
- */
- mutex_lock(&uvc_driver.ctrl_mutex);
+ struct uvc_control_mapping *map;
+ unsigned int size;
- /* First check if the list contains a control matching the new one.
- * Bail out if it does.
+ /* 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.
*/
- list_for_each_entry(ctrl, &uvc_driver.controls, list) {
- if (memcmp(ctrl->entity, info->entity, 16))
- continue;
+ map = kmemdup(mapping, sizeof(*mapping), GFP_KERNEL);
+ if (map == NULL)
+ return -ENOMEM;
- if (ctrl->selector == info->selector) {
- uvc_trace(UVC_TRACE_CONTROL,
- "Control %pUl/%u is already defined.\n",
- info->entity, info->selector);
- ret = -EEXIST;
- goto end;
- }
- if (ctrl->index == info->index) {
- uvc_trace(UVC_TRACE_CONTROL,
- "Control %pUl/%u would overwrite index %d.\n",
- info->entity, info->selector, info->index);
- ret = -EEXIST;
- goto end;
- }
+ 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);
+ return -ENOMEM;
}
- list_for_each_entry(dev, &uvc_driver.devices, list)
- uvc_ctrl_add_ctrl(dev, info);
+ if (map->get == NULL)
+ map->get = uvc_get_le_value;
+ if (map->set == NULL)
+ map->set = uvc_set_le_value;
- INIT_LIST_HEAD(&info->mappings);
- list_add_tail(&info->list, &uvc_driver.controls);
-end:
- mutex_unlock(&uvc_driver.ctrl_mutex);
- return ret;
+ map->ctrl = &ctrl->info;
+ list_add_tail(&map->list, &ctrl->info.mappings);
+ uvc_trace(UVC_TRACE_CONTROL,
+ "Adding mapping '%s' to control %pUl/%u.\n",
+ map->name, ctrl->info.entity, ctrl->info.selector);
+
+ return 0;
}
-int uvc_ctrl_add_mapping(struct uvc_control_mapping *mapping)
+int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
+ const struct uvc_control_mapping *mapping)
{
- struct uvc_control_info *info;
+ struct uvc_device *dev = chain->dev;
struct uvc_control_mapping *map;
- int ret = -EINVAL;
-
- if (mapping->get == NULL)
- mapping->get = uvc_get_le_value;
- if (mapping->set == NULL)
- mapping->set = uvc_set_le_value;
+ struct uvc_entity *entity;
+ struct uvc_control *ctrl;
+ int found = 0;
+ int ret;
if (mapping->id & ~V4L2_CTRL_ID_MASK) {
- uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s' with "
- "invalid control id 0x%08x\n", mapping->name,
+ uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s', control "
+ "id 0x%08x is invalid.\n", mapping->name,
mapping->id);
return -EINVAL;
}
- mutex_lock(&uvc_driver.ctrl_mutex);
- list_for_each_entry(info, &uvc_driver.controls, list) {
- if (memcmp(info->entity, mapping->entity, 16) ||
- info->selector != mapping->selector)
- continue;
+ /* Search for the matching (GUID/CS) control in the given device */
+ list_for_each_entry(entity, &dev->entities, list) {
+ unsigned int i;
- if (info->size * 8 < mapping->size + mapping->offset) {
- uvc_trace(UVC_TRACE_CONTROL,
- "Mapping '%s' would overflow control %pUl/%u\n",
- mapping->name, info->entity, info->selector);
- ret = -EOVERFLOW;
- goto end;
- }
+ if (UVC_ENTITY_TYPE(entity) != UVC_VC_EXTENSION_UNIT ||
+ !uvc_entity_match_guid(entity, mapping->entity))
+ continue;
- /* Check if the list contains a mapping matching the new one.
- * Bail out if it does.
- */
- list_for_each_entry(map, &info->mappings, list) {
- if (map->id == mapping->id) {
- uvc_trace(UVC_TRACE_CONTROL, "Mapping '%s' is "
- "already defined.\n", mapping->name);
- ret = -EEXIST;
- goto end;
+ for (i = 0; i < entity->ncontrols; ++i) {
+ ctrl = &entity->controls[i];
+ if (ctrl->index == mapping->selector - 1) {
+ found = 1;
+ break;
}
}
- mapping->ctrl = info;
- list_add_tail(&mapping->list, &info->mappings);
- uvc_trace(UVC_TRACE_CONTROL,
- "Adding mapping %s to control %pUl/%u.\n",
- mapping->name, info->entity, info->selector);
+ if (found)
+ break;
+ }
+ if (!found)
+ return -ENOENT;
- ret = 0;
- break;
+ if (mutex_lock_interruptible(&chain->ctrl_mutex))
+ return -ERESTARTSYS;
+
+ /* Perform delayed initialization of XU controls */
+ ret = uvc_ctrl_init_xu_ctrl(dev, ctrl);
+ if (ret < 0) {
+ ret = -ENOENT;
+ goto done;
+ }
+
+ list_for_each_entry(map, &ctrl->info.mappings, list) {
+ if (mapping->id == map->id) {
+ uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s', "
+ "control id 0x%08x already exists.\n",
+ mapping->name, mapping->id);
+ ret = -EEXIST;
+ goto done;
+ }
}
-end:
- mutex_unlock(&uvc_driver.ctrl_mutex);
+
+ /* Prevent excess memory consumption */
+ if (atomic_inc_return(&dev->nmappings) > UVC_MAX_CONTROL_MAPPINGS) {
+ atomic_dec(&dev->nmappings);
+ uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s', maximum "
+ "mappings count (%u) exceeded.\n", mapping->name,
+ UVC_MAX_CONTROL_MAPPINGS);
+ ret = -ENOMEM;
+ goto done;
+ }
+
+ ret = __uvc_ctrl_add_mapping(dev, ctrl, mapping);
+ if (ret < 0)
+ atomic_dec(&dev->nmappings);
+
+done:
+ mutex_unlock(&chain->ctrl_mutex);
return ret;
}
* are currently the ones that crash the camera or unconditionally return an
* error when queried.
*/
-static void
-uvc_ctrl_prune_entity(struct uvc_device *dev, struct uvc_entity *entity)
+static void uvc_ctrl_prune_entity(struct uvc_device *dev,
+ struct uvc_entity *entity)
{
- static const struct {
+ struct uvc_ctrl_blacklist {
struct usb_device_id id;
u8 index;
- } blacklist[] = {
+ };
+
+ static const struct uvc_ctrl_blacklist processing_blacklist[] = {
{ { USB_DEVICE(0x13d3, 0x509b) }, 9 }, /* Gain */
{ { USB_DEVICE(0x1c4f, 0x3000) }, 6 }, /* WB Temperature */
{ { USB_DEVICE(0x5986, 0x0241) }, 2 }, /* Hue */
};
+ static const struct uvc_ctrl_blacklist camera_blacklist[] = {
+ { { USB_DEVICE(0x06f8, 0x3005) }, 9 }, /* Zoom, Absolute */
+ };
- u8 *controls;
+ const struct uvc_ctrl_blacklist *blacklist;
unsigned int size;
+ unsigned int count;
unsigned int i;
+ u8 *controls;
- if (UVC_ENTITY_TYPE(entity) != UVC_VC_PROCESSING_UNIT)
- return;
+ switch (UVC_ENTITY_TYPE(entity)) {
+ case UVC_VC_PROCESSING_UNIT:
+ blacklist = processing_blacklist;
+ count = ARRAY_SIZE(processing_blacklist);
+ controls = entity->processing.bmControls;
+ size = entity->processing.bControlSize;
+ break;
+
+ case UVC_ITT_CAMERA:
+ blacklist = camera_blacklist;
+ count = ARRAY_SIZE(camera_blacklist);
+ controls = entity->camera.bmControls;
+ size = entity->camera.bControlSize;
+ break;
- controls = entity->processing.bmControls;
- size = entity->processing.bControlSize;
+ default:
+ return;
+ }
- for (i = 0; i < ARRAY_SIZE(blacklist); ++i) {
+ for (i = 0; i < count; ++i) {
if (!usb_match_one_id(dev->intf, &blacklist[i].id))
continue;
}
}
+/*
+ * Add control information and hardcoded stock control mappings to the given
+ * device.
+ */
+static void uvc_ctrl_init_ctrl(struct uvc_device *dev, struct uvc_control *ctrl)
+{
+ const struct uvc_control_info *info = uvc_ctrls;
+ const struct uvc_control_info *iend = info + ARRAY_SIZE(uvc_ctrls);
+ const struct uvc_control_mapping *mapping = uvc_ctrl_mappings;
+ const struct uvc_control_mapping *mend =
+ mapping + ARRAY_SIZE(uvc_ctrl_mappings);
+
+ /* XU controls initialization requires querying the device for control
+ * information. As some buggy UVC devices will crash when queried
+ * repeatedly in a tight loop, delay XU controls initialization until
+ * first use.
+ */
+ if (UVC_ENTITY_TYPE(ctrl->entity) == UVC_VC_EXTENSION_UNIT)
+ return;
+
+ for (; info < iend; ++info) {
+ if (uvc_entity_match_guid(ctrl->entity, info->entity) &&
+ ctrl->index == info->index) {
+ uvc_ctrl_add_info(dev, ctrl, info);
+ break;
+ }
+ }
+
+ if (!ctrl->initialized)
+ return;
+
+ for (; mapping < mend; ++mapping) {
+ if (uvc_entity_match_guid(ctrl->entity, mapping->entity) &&
+ ctrl->info.selector == mapping->selector)
+ __uvc_ctrl_add_mapping(dev, ctrl, mapping);
+ }
+}
+
/*
* Initialize device controls.
*/
int uvc_ctrl_init_device(struct uvc_device *dev)
{
- struct uvc_control_info *info;
- struct uvc_control *ctrl;
struct uvc_entity *entity;
unsigned int i;
/* Walk the entities list and instantiate controls */
list_for_each_entry(entity, &dev->entities, list) {
+ struct uvc_control *ctrl;
unsigned int bControlSize = 0, ncontrols = 0;
__u8 *bmControls = NULL;
bControlSize = entity->camera.bControlSize;
}
+ /* Remove bogus/blacklisted controls */
uvc_ctrl_prune_entity(dev, entity);
+ /* Count supported controls and allocate the controls array */
for (i = 0; i < bControlSize; ++i)
ncontrols += hweight8(bmControls[i]);
-
if (ncontrols == 0)
continue;
- entity->controls = kzalloc(ncontrols*sizeof *ctrl, GFP_KERNEL);
+ entity->controls = kzalloc(ncontrols * sizeof(*ctrl),
+ GFP_KERNEL);
if (entity->controls == NULL)
return -ENOMEM;
-
entity->ncontrols = ncontrols;
+ /* Initialize all supported controls */
ctrl = entity->controls;
for (i = 0; i < bControlSize * 8; ++i) {
if (uvc_test_bit(bmControls, i) == 0)
ctrl->entity = entity;
ctrl->index = i;
+
+ uvc_ctrl_init_ctrl(dev, ctrl);
ctrl++;
}
}
- /* Walk the controls info list and associate them with the device
- * controls, then add the device to the global device list. This has
- * to be done while holding the controls lock, to make sure
- * uvc_ctrl_add_info() will not get called in-between.
- */
- mutex_lock(&uvc_driver.ctrl_mutex);
- list_for_each_entry(info, &uvc_driver.controls, list)
- uvc_ctrl_add_ctrl(dev, info);
-
- list_add_tail(&dev->list, &uvc_driver.devices);
- mutex_unlock(&uvc_driver.ctrl_mutex);
-
return 0;
}
/*
* Cleanup device controls.
*/
-void uvc_ctrl_cleanup_device(struct uvc_device *dev)
+static void uvc_ctrl_cleanup_mappings(struct uvc_device *dev,
+ struct uvc_control *ctrl)
{
- struct uvc_entity *entity;
- unsigned int i;
-
- /* Remove the device from the global devices list */
- mutex_lock(&uvc_driver.ctrl_mutex);
- if (dev->list.next != NULL)
- list_del(&dev->list);
- mutex_unlock(&uvc_driver.ctrl_mutex);
-
- list_for_each_entry(entity, &dev->entities, list) {
- for (i = 0; i < entity->ncontrols; ++i)
- kfree(entity->controls[i].uvc_data);
+ struct uvc_control_mapping *mapping, *nm;
- kfree(entity->controls);
+ list_for_each_entry_safe(mapping, nm, &ctrl->info.mappings, list) {
+ list_del(&mapping->list);
+ kfree(mapping->menu_info);
+ kfree(mapping);
}
}
-void uvc_ctrl_cleanup(void)
+void uvc_ctrl_cleanup_device(struct uvc_device *dev)
{
- struct uvc_control_info *info;
- struct uvc_control_info *ni;
- struct uvc_control_mapping *mapping;
- struct uvc_control_mapping *nm;
+ struct uvc_entity *entity;
+ unsigned int i;
- list_for_each_entry_safe(info, ni, &uvc_driver.controls, list) {
- if (!(info->flags & UVC_CONTROL_EXTENSION))
- continue;
+ /* Free controls and control mappings for all entities. */
+ list_for_each_entry(entity, &dev->entities, list) {
+ for (i = 0; i < entity->ncontrols; ++i) {
+ struct uvc_control *ctrl = &entity->controls[i];
+
+ if (!ctrl->initialized)
+ continue;
- list_for_each_entry_safe(mapping, nm, &info->mappings, list) {
- list_del(&mapping->list);
- kfree(mapping->menu_info);
- kfree(mapping);
+ uvc_ctrl_cleanup_mappings(dev, ctrl);
+ kfree(ctrl->uvc_data);
}
- list_del(&info->list);
- kfree(info);
+ kfree(entity->controls);
}
}
-
-void uvc_ctrl_init(void)
-{
- struct uvc_control_info *ctrl = uvc_ctrls;
- struct uvc_control_info *cend = ctrl + ARRAY_SIZE(uvc_ctrls);
- struct uvc_control_mapping *mapping = uvc_ctrl_mappings;
- struct uvc_control_mapping *mend =
- mapping + ARRAY_SIZE(uvc_ctrl_mappings);
-
- for (; ctrl < cend; ++ctrl)
- uvc_ctrl_add_info(ctrl);
-
- for (; mapping < mend; ++mapping)
- uvc_ctrl_add_mapping(mapping);
-}
-
projects / mv-sheeva.git / blobdiff