#include <asm/barrier.h>
#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/usb.h>
#include <linux/usb/uvc.h>
#include <linux/videodev2.h>
#include <linux/vmalloc.h>
#include <linux/wait.h>
#include <linux/workqueue.h>
#include <linux/atomic.h>
#include <media/v4l2-ctrls.h>
#include "uvcvideo.h"
#define UVC_CTRL_DATA_CURRENT 0
#define UVC_CTRL_DATA_BACKUP 1
#define UVC_CTRL_DATA_MIN 2
#define UVC_CTRL_DATA_MAX 3
#define UVC_CTRL_DATA_RES 4
#define UVC_CTRL_DATA_DEF 5
#define UVC_CTRL_DATA_LAST 6
static const struct uvc_control_info uvc_ctrls[] = {
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_BRIGHTNESS_CONTROL,
.index = 0,
.size = 2,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE,
},
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_CONTRAST_CONTROL,
.index = 1,
.size = 2,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE,
},
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_HUE_CONTROL,
.index = 2,
.size = 2,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE
| UVC_CTRL_FLAG_AUTO_UPDATE,
},
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_SATURATION_CONTROL,
.index = 3,
.size = 2,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE,
},
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_SHARPNESS_CONTROL,
.index = 4,
.size = 2,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE,
},
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_GAMMA_CONTROL,
.index = 5,
.size = 2,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE,
},
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL,
.index = 6,
.size = 2,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE
| UVC_CTRL_FLAG_AUTO_UPDATE,
},
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL,
.index = 7,
.size = 4,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE
| UVC_CTRL_FLAG_AUTO_UPDATE,
},
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL,
.index = 8,
.size = 2,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE,
},
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_GAIN_CONTROL,
.index = 9,
.size = 2,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE,
},
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
.index = 10,
.size = 1,
.flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
| UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE,
},
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_HUE_AUTO_CONTROL,
.index = 11,
.size = 1,
.flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
| UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE,
},
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL,
.index = 12,
.size = 1,
.flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
| UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE,
},
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL,
.index = 13,
.size = 1,
.flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
| UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE,
},
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_DIGITAL_MULTIPLIER_CONTROL,
.index = 14,
.size = 2,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE,
},
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL,
.index = 15,
.size = 2,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE,
},
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_ANALOG_VIDEO_STANDARD_CONTROL,
.index = 16,
.size = 1,
.flags = UVC_CTRL_FLAG_GET_CUR,
},
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_ANALOG_LOCK_STATUS_CONTROL,
.index = 17,
.size = 1,
.flags = UVC_CTRL_FLAG_GET_CUR,
},
{
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_SCANNING_MODE_CONTROL,
.index = 0,
.size = 1,
.flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
| UVC_CTRL_FLAG_RESTORE,
},
{
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_AE_MODE_CONTROL,
.index = 1,
.size = 1,
.flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
| UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_GET_RES
| UVC_CTRL_FLAG_RESTORE,
},
{
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_AE_PRIORITY_CONTROL,
.index = 2,
.size = 1,
.flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
| UVC_CTRL_FLAG_RESTORE,
},
{
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL,
.index = 3,
.size = 4,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE
| UVC_CTRL_FLAG_AUTO_UPDATE,
},
{
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_EXPOSURE_TIME_RELATIVE_CONTROL,
.index = 4,
.size = 1,
.flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_RESTORE,
},
{
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_FOCUS_ABSOLUTE_CONTROL,
.index = 5,
.size = 2,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE
| UVC_CTRL_FLAG_AUTO_UPDATE,
},
{
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_FOCUS_RELATIVE_CONTROL,
.index = 6,
.size = 2,
.flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_MIN
| UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES
| UVC_CTRL_FLAG_GET_DEF
| UVC_CTRL_FLAG_AUTO_UPDATE,
},
{
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_IRIS_ABSOLUTE_CONTROL,
.index = 7,
.size = 2,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE
| UVC_CTRL_FLAG_AUTO_UPDATE,
},
{
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_IRIS_RELATIVE_CONTROL,
.index = 8,
.size = 1,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_AUTO_UPDATE,
},
{
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_ZOOM_ABSOLUTE_CONTROL,
.index = 9,
.size = 2,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE
| UVC_CTRL_FLAG_AUTO_UPDATE,
},
{
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_ZOOM_RELATIVE_CONTROL,
.index = 10,
.size = 3,
.flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_MIN
| UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES
| UVC_CTRL_FLAG_GET_DEF
| UVC_CTRL_FLAG_AUTO_UPDATE,
},
{
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL,
.index = 11,
.size = 8,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE
| UVC_CTRL_FLAG_AUTO_UPDATE,
},
{
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_PANTILT_RELATIVE_CONTROL,
.index = 12,
.size = 4,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_AUTO_UPDATE,
},
{
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_ROLL_ABSOLUTE_CONTROL,
.index = 13,
.size = 2,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE
| UVC_CTRL_FLAG_AUTO_UPDATE,
},
{
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_ROLL_RELATIVE_CONTROL,
.index = 14,
.size = 2,
.flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_MIN
| UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES
| UVC_CTRL_FLAG_GET_DEF
| UVC_CTRL_FLAG_AUTO_UPDATE,
},
{
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_FOCUS_AUTO_CONTROL,
.index = 17,
.size = 1,
.flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
| UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_RESTORE,
},
{
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_PRIVACY_CONTROL,
.index = 18,
.size = 1,
.flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
| UVC_CTRL_FLAG_RESTORE
| UVC_CTRL_FLAG_AUTO_UPDATE,
},
{
.entity = UVC_GUID_EXT_GPIO_CONTROLLER,
.selector = UVC_CT_PRIVACY_CONTROL,
.index = 0,
.size = 1,
.flags = UVC_CTRL_FLAG_GET_CUR
| UVC_CTRL_FLAG_AUTO_UPDATE,
},
{
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_REGION_OF_INTEREST_CONTROL,
.index = 21,
.size = 10,
.flags = UVC_CTRL_FLAG_SET_CUR | UVC_CTRL_FLAG_GET_CUR
| UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX
| UVC_CTRL_FLAG_GET_DEF
| UVC_CTRL_FLAG_AUTO_UPDATE,
},
{
.entity = UVC_GUID_CHROMEOS_XU,
.selector = UVC_CROSXU_CONTROL_IQ_PROFILE,
.index = 3,
.size = 1,
.flags = UVC_CTRL_FLAG_SET_CUR
| UVC_CTRL_FLAG_GET_RANGE
| UVC_CTRL_FLAG_RESTORE,
},
};
static const u32 uvc_control_classes[] = {
V4L2_CID_CAMERA_CLASS,
V4L2_CID_USER_CLASS,
};
static const int exposure_auto_mapping[] = { 2, 1, 4, 8 };
static const int cros_colorfx_mapping[] = {
1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
0,
};
static bool uvc_ctrl_mapping_is_compound(struct uvc_control_mapping *mapping)
{
return mapping->v4l2_type >= V4L2_CTRL_COMPOUND_TYPES;
}
static s32 uvc_mapping_get_s32(struct uvc_control_mapping *mapping,
u8 query, const void *data_in)
{
s32 data_out = 0;
mapping->get(mapping, query, data_in, sizeof(data_out), &data_out);
return data_out;
}
static void uvc_mapping_set_s32(struct uvc_control_mapping *mapping,
s32 data_in, void *data_out)
{
mapping->set(mapping, sizeof(data_in), &data_in, data_out);
}
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 int uvc_ctrl_get_zoom(struct uvc_control_mapping *mapping, u8 query,
const void *uvc_in, size_t v4l2_size,
void *v4l2_out)
{
u8 value = ((u8 *)uvc_in)[2];
s8 sign = ((s8 *)uvc_in)[0];
s32 *out = v4l2_out;
if (WARN_ON(v4l2_size != sizeof(s32)))
return -EINVAL;
switch (query) {
case UVC_GET_CUR:
*out = (sign == 0) ? 0 : (sign > 0 ? value : -value);
return 0;
case UVC_GET_MIN:
case UVC_GET_MAX:
case UVC_GET_RES:
case UVC_GET_DEF:
default:
*out = value;
return 0;
}
}
static int uvc_ctrl_set_zoom(struct uvc_control_mapping *mapping,
size_t v4l2_size, const void *v4l2_in,
void *uvc_out)
{
u8 *out = uvc_out;
s32 value;
if (WARN_ON(v4l2_size != sizeof(s32)))
return -EINVAL;
value = *(u32 *)v4l2_in;
out[0] = value == 0 ? 0 : (value > 0) ? 1 : 0xff;
out[2] = min_t(int, abs(value), 0xff);
return 0;
}
static int uvc_ctrl_get_rel_speed(struct uvc_control_mapping *mapping,
u8 query, const void *uvc_in,
size_t v4l2_size, void *v4l2_out)
{
unsigned int first = mapping->offset / 8;
u8 value = ((u8 *)uvc_in)[first + 1];
s8 sign = ((s8 *)uvc_in)[first];
s32 *out = v4l2_out;
if (WARN_ON(v4l2_size != sizeof(s32)))
return -EINVAL;
switch (query) {
case UVC_GET_CUR:
*out = (sign == 0) ? 0 : (sign > 0 ? value : -value);
return 0;
case UVC_GET_MIN:
case UVC_GET_MAX:
case UVC_GET_RES:
case UVC_GET_DEF:
default:
*out = value;
return 0;
}
}
static int uvc_ctrl_set_rel_speed(struct uvc_control_mapping *mapping,
size_t v4l2_size, const void *v4l2_in,
void *uvc_out)
{
unsigned int first = mapping->offset / 8;
u8 *out = uvc_out;
s32 value;
if (WARN_ON(v4l2_size != sizeof(s32)))
return -EINVAL;
value = *(u32 *)v4l2_in;
out[first] = value == 0 ? 0 : (value > 0) ? 1 : 0xff;
out[first + 1] = min_t(int, abs(value), 0xff);
return 0;
}
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_mask = GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
V4L2_CID_POWER_LINE_FREQUENCY_50HZ),
};
static 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_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_filter_plf_mapping(
struct uvc_video_chain *chain, struct uvc_control *ctrl)
{
const struct uvc_control_mapping *out_mapping =
&uvc_ctrl_power_line_mapping_uvc11;
u8 *buf __free(kfree) = NULL;
u8 init_val;
int ret;
buf = kmalloc_obj(*buf);
if (!buf)
return NULL;
ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, ctrl->entity->id,
chain->dev->intfnum, ctrl->info.selector,
buf, sizeof(*buf));
if (ret)
return NULL;
init_val = *buf;
*buf = V4L2_CID_POWER_LINE_FREQUENCY_DISABLED;
ret = uvc_query_ctrl(chain->dev, UVC_SET_CUR, ctrl->entity->id,
chain->dev->intfnum, ctrl->info.selector,
buf, sizeof(*buf));
if (ret)
return &uvc_ctrl_power_line_mapping_limited;
if (chain->dev->uvc_version < 0x150)
goto end;
*buf = V4L2_CID_POWER_LINE_FREQUENCY_AUTO;
ret = uvc_query_ctrl(chain->dev, UVC_SET_CUR, ctrl->entity->id,
chain->dev->intfnum, ctrl->info.selector,
buf, sizeof(*buf));
if (!ret)
out_mapping = &uvc_ctrl_power_line_mapping_uvc15;
end:
*buf = init_val;
uvc_query_ctrl(chain->dev, UVC_SET_CUR, ctrl->entity->id,
chain->dev->intfnum, ctrl->info.selector,
buf, sizeof(*buf));
return out_mapping;
}
static int uvc_get_rect(struct uvc_control_mapping *mapping, u8 query,
const void *uvc_in, size_t v4l2_size, void *v4l2_out)
{
const struct uvc_rect *uvc_rect = uvc_in;
struct v4l2_rect *v4l2_rect = v4l2_out;
if (WARN_ON(v4l2_size != sizeof(struct v4l2_rect)))
return -EINVAL;
if (uvc_rect->left > uvc_rect->right ||
uvc_rect->top > uvc_rect->bottom)
return -EIO;
v4l2_rect->top = uvc_rect->top;
v4l2_rect->left = uvc_rect->left;
v4l2_rect->height = uvc_rect->bottom - uvc_rect->top + 1;
v4l2_rect->width = uvc_rect->right - uvc_rect->left + 1;
return 0;
}
static int uvc_set_rect(struct uvc_control_mapping *mapping, size_t v4l2_size,
const void *v4l2_in, void *uvc_out)
{
struct uvc_rect *uvc_rect = uvc_out;
const struct v4l2_rect *v4l2_rect = v4l2_in;
if (WARN_ON(v4l2_size != sizeof(struct v4l2_rect)))
return -EINVAL;
uvc_rect->top = min(0xffff, v4l2_rect->top);
uvc_rect->left = min(0xffff, v4l2_rect->left);
uvc_rect->bottom = min(0xffff, v4l2_rect->top + v4l2_rect->height - 1);
uvc_rect->right = min(0xffff, v4l2_rect->left + v4l2_rect->width - 1);
return 0;
}
static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
{
.id = V4L2_CID_BRIGHTNESS,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_BRIGHTNESS_CONTROL,
.size = 16,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_SIGNED,
},
{
.id = V4L2_CID_CONTRAST,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_CONTRAST_CONTROL,
.size = 16,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
},
{
.id = V4L2_CID_HUE,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_HUE_CONTROL,
.size = 16,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_SIGNED,
.master_id = V4L2_CID_HUE_AUTO,
.master_manual = 0,
},
{
.id = V4L2_CID_SATURATION,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_SATURATION_CONTROL,
.size = 16,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
},
{
.id = V4L2_CID_SHARPNESS,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_SHARPNESS_CONTROL,
.size = 16,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
},
{
.id = V4L2_CID_GAMMA,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_GAMMA_CONTROL,
.size = 16,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
},
{
.id = V4L2_CID_BACKLIGHT_COMPENSATION,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_BACKLIGHT_COMPENSATION_CONTROL,
.size = 16,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
},
{
.id = V4L2_CID_GAIN,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_GAIN_CONTROL,
.size = 16,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
},
{
.id = V4L2_CID_HUE_AUTO,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_HUE_AUTO_CONTROL,
.size = 1,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
.data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
.slave_ids = { V4L2_CID_HUE, },
},
{
.id = V4L2_CID_EXPOSURE_AUTO,
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_AE_MODE_CONTROL,
.size = 4,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_MENU,
.data_type = UVC_CTRL_DATA_TYPE_BITMASK,
.menu_mapping = exposure_auto_mapping,
.menu_mask = GENMASK(V4L2_EXPOSURE_APERTURE_PRIORITY,
V4L2_EXPOSURE_AUTO),
.slave_ids = { V4L2_CID_EXPOSURE_ABSOLUTE, },
},
{
.id = V4L2_CID_EXPOSURE_AUTO_PRIORITY,
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_AE_PRIORITY_CONTROL,
.size = 1,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
.data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
},
{
.id = V4L2_CID_EXPOSURE_ABSOLUTE,
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_EXPOSURE_TIME_ABSOLUTE_CONTROL,
.size = 32,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
.master_id = V4L2_CID_EXPOSURE_AUTO,
.master_manual = V4L2_EXPOSURE_MANUAL,
},
{
.id = V4L2_CID_AUTO_WHITE_BALANCE,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL,
.size = 1,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
.data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
.slave_ids = { V4L2_CID_WHITE_BALANCE_TEMPERATURE, },
},
{
.id = V4L2_CID_WHITE_BALANCE_TEMPERATURE,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_WHITE_BALANCE_TEMPERATURE_CONTROL,
.size = 16,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
.master_id = V4L2_CID_AUTO_WHITE_BALANCE,
.master_manual = 0,
},
{
.id = V4L2_CID_AUTO_WHITE_BALANCE,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL,
.size = 1,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
.data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
.slave_ids = { V4L2_CID_BLUE_BALANCE,
V4L2_CID_RED_BALANCE },
},
{
.id = V4L2_CID_BLUE_BALANCE,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL,
.size = 16,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_SIGNED,
.master_id = V4L2_CID_AUTO_WHITE_BALANCE,
.master_manual = 0,
},
{
.id = V4L2_CID_RED_BALANCE,
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_WHITE_BALANCE_COMPONENT_CONTROL,
.size = 16,
.offset = 16,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_SIGNED,
.master_id = V4L2_CID_AUTO_WHITE_BALANCE,
.master_manual = 0,
},
{
.id = V4L2_CID_FOCUS_ABSOLUTE,
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_FOCUS_ABSOLUTE_CONTROL,
.size = 16,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
.master_id = V4L2_CID_FOCUS_AUTO,
.master_manual = 0,
},
{
.id = V4L2_CID_FOCUS_AUTO,
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_FOCUS_AUTO_CONTROL,
.size = 1,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
.data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
.slave_ids = { V4L2_CID_FOCUS_ABSOLUTE, },
},
{
.id = V4L2_CID_IRIS_ABSOLUTE,
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_IRIS_ABSOLUTE_CONTROL,
.size = 16,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
},
{
.id = V4L2_CID_IRIS_RELATIVE,
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_IRIS_RELATIVE_CONTROL,
.size = 8,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_SIGNED,
},
{
.id = V4L2_CID_ZOOM_ABSOLUTE,
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_ZOOM_ABSOLUTE_CONTROL,
.size = 16,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_UNSIGNED,
},
{
.id = V4L2_CID_ZOOM_CONTINUOUS,
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_ZOOM_RELATIVE_CONTROL,
.size = 0,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_SIGNED,
.get = uvc_ctrl_get_zoom,
.set = uvc_ctrl_set_zoom,
},
{
.id = V4L2_CID_PAN_ABSOLUTE,
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL,
.size = 32,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_SIGNED,
},
{
.id = V4L2_CID_TILT_ABSOLUTE,
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_PANTILT_ABSOLUTE_CONTROL,
.size = 32,
.offset = 32,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_SIGNED,
},
{
.id = V4L2_CID_PAN_SPEED,
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_PANTILT_RELATIVE_CONTROL,
.size = 16,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_SIGNED,
.get = uvc_ctrl_get_rel_speed,
.set = uvc_ctrl_set_rel_speed,
},
{
.id = V4L2_CID_TILT_SPEED,
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_PANTILT_RELATIVE_CONTROL,
.size = 16,
.offset = 16,
.v4l2_type = V4L2_CTRL_TYPE_INTEGER,
.data_type = UVC_CTRL_DATA_TYPE_SIGNED,
.get = uvc_ctrl_get_rel_speed,
.set = uvc_ctrl_set_rel_speed,
},
{
.id = V4L2_CID_PRIVACY,
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_PRIVACY_CONTROL,
.size = 1,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
.data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
},
{
.id = V4L2_CID_PRIVACY,
.entity = UVC_GUID_EXT_GPIO_CONTROLLER,
.selector = UVC_CT_PRIVACY_CONTROL,
.size = 1,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_BOOLEAN,
.data_type = UVC_CTRL_DATA_TYPE_BOOLEAN,
},
{
.entity = UVC_GUID_UVC_PROCESSING,
.selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
.filter_mapping = uvc_ctrl_filter_plf_mapping,
},
{
.id = V4L2_CID_UVC_REGION_OF_INTEREST_RECT,
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_REGION_OF_INTEREST_CONTROL,
.size = sizeof(struct uvc_rect) * 8,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_RECT,
.data_type = UVC_CTRL_DATA_TYPE_RECT,
.get = uvc_get_rect,
.set = uvc_set_rect,
.name = "Region of Interest Rectangle",
},
{
.id = V4L2_CID_UVC_REGION_OF_INTEREST_AUTO,
.entity = UVC_GUID_UVC_CAMERA,
.selector = UVC_CT_REGION_OF_INTEREST_CONTROL,
.size = 16,
.offset = 64,
.v4l2_type = V4L2_CTRL_TYPE_BITMASK,
.data_type = UVC_CTRL_DATA_TYPE_BITMASK,
.name = "Region of Interest Auto Ctrls",
},
{
.id = V4L2_CID_COLORFX,
.entity = UVC_GUID_CHROMEOS_XU,
.selector = UVC_CROSXU_CONTROL_IQ_PROFILE,
.size = 8,
.offset = 0,
.v4l2_type = V4L2_CTRL_TYPE_MENU,
.data_type = UVC_CTRL_DATA_TYPE_ENUM,
.menu_mapping = cros_colorfx_mapping,
.menu_mask = BIT(V4L2_COLORFX_VIVID) |
BIT(V4L2_COLORFX_NONE),
},
};
static inline u8 *uvc_ctrl_data(struct uvc_control *ctrl, int id)
{
return ctrl->uvc_data + id * ctrl->info.size;
}
static inline int uvc_test_bit(const u8 *data, int bit)
{
return (data[bit >> 3] >> (bit & 7)) & 1;
}
static inline void uvc_clear_bit(u8 *data, int bit)
{
data[bit >> 3] &= ~(1 << (bit & 7));
}
static s32 uvc_menu_to_v4l2_menu(struct uvc_control_mapping *mapping, s32 val)
{
unsigned int i;
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 == val)
return i;
}
return val;
}
static int uvc_get_le_value(struct uvc_control_mapping *mapping,
u8 query, const void *uvc_in, size_t v4l2_size,
void *v4l2_out)
{
int offset = mapping->offset;
int bits = mapping->size;
const u8 *data = uvc_in;
s32 *out = v4l2_out;
s32 value = 0;
u8 mask;
if (WARN_ON(v4l2_size != sizeof(s32)))
return -EINVAL;
data += offset / 8;
offset &= 7;
mask = ((1LL << bits) - 1) << offset;
while (1) {
u8 byte = *data & mask;
value |= offset > 0 ? (byte >> offset) : (byte << (-offset));
bits -= 8 - max(offset, 0);
if (bits <= 0)
break;
offset -= 8;
mask = (1 << bits) - 1;
data++;
}
if (mapping->data_type == UVC_CTRL_DATA_TYPE_SIGNED)
value |= -(value & (1 << (mapping->size - 1)));
if (mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) {
*out = value;
return 0;
}
switch (query) {
case UVC_GET_CUR:
case UVC_GET_DEF:
*out = uvc_menu_to_v4l2_menu(mapping, value);
return 0;
}
*out = value;
return 0;
}
static int uvc_set_le_value(struct uvc_control_mapping *mapping,
size_t v4l2_size, const void *v4l2_in,
void *uvc_out)
{
int offset = mapping->offset;
int bits = mapping->size;
u8 *data = uvc_out;
s32 value;
u8 mask;
if (WARN_ON(v4l2_size != sizeof(s32)))
return -EINVAL;
value = *(s32 *)v4l2_in;
switch (mapping->v4l2_type) {
case V4L2_CTRL_TYPE_MENU:
value = uvc_mapping_get_menu_value(mapping, value);
break;
case V4L2_CTRL_TYPE_BUTTON:
value = -1;
break;
default:
break;
}
data += offset / 8;
offset &= 7;
for (; bits > 0; data++) {
mask = ((1LL << bits) - 1) << offset;
*data = (*data & ~mask) | ((value << offset) & mask);
value >>= offset ? offset : 8;
bits -= 8 - offset;
offset = 0;
}
return 0;
}
static int uvc_entity_match_guid(const struct uvc_entity *entity,
const u8 guid[16])
{
return memcmp(entity->guid, guid, sizeof(entity->guid)) == 0;
}
static void __uvc_find_control(struct uvc_entity *entity, u32 v4l2_id,
struct uvc_control_mapping **mapping, struct uvc_control **control,
int next, int next_compound)
{
struct uvc_control *ctrl;
struct uvc_control_mapping *map;
unsigned int i;
if (entity == NULL)
return;
for (i = 0; i < entity->ncontrols; ++i) {
ctrl = &entity->controls[i];
if (!ctrl->initialized)
continue;
list_for_each_entry(map, &ctrl->info.mappings, list) {
if (map->id == v4l2_id && !next && !next_compound) {
*control = ctrl;
*mapping = map;
return;
}
if ((*mapping == NULL || (*mapping)->id > map->id) &&
(map->id > v4l2_id) &&
(uvc_ctrl_mapping_is_compound(map) ?
next_compound : next)) {
*control = ctrl;
*mapping = map;
}
}
}
}
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;
struct uvc_entity *entity;
int next = v4l2_id & V4L2_CTRL_FLAG_NEXT_CTRL;
int next_compound = v4l2_id & V4L2_CTRL_FLAG_NEXT_COMPOUND;
*mapping = NULL;
v4l2_id &= V4L2_CTRL_ID_MASK;
list_for_each_entry(entity, &chain->entities, chain) {
__uvc_find_control(entity, v4l2_id, mapping, &ctrl, next,
next_compound);
if (ctrl && !next && !next_compound)
return ctrl;
}
if (!ctrl && !next && !next_compound)
uvc_dbg(chain->dev, CONTROL, "Control 0x%08x not found\n",
v4l2_id);
return ctrl;
}
static int uvc_ctrl_populate_cache(struct uvc_video_chain *chain,
struct uvc_control *ctrl)
{
int ret;
if (ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF) {
ret = uvc_query_ctrl(chain->dev, UVC_GET_DEF, ctrl->entity->id,
chain->dev->intfnum, ctrl->info.selector,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF),
ctrl->info.size);
if (ret < 0)
return ret;
}
if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN) {
ret = uvc_query_ctrl(chain->dev, UVC_GET_MIN, ctrl->entity->id,
chain->dev->intfnum, ctrl->info.selector,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN),
ctrl->info.size);
if (ret < 0)
return ret;
}
if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX) {
ret = uvc_query_ctrl(chain->dev, UVC_GET_MAX, ctrl->entity->id,
chain->dev->intfnum, ctrl->info.selector,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX),
ctrl->info.size);
if (ret < 0)
return ret;
}
if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES) {
ret = uvc_query_ctrl(chain->dev, UVC_GET_RES, ctrl->entity->id,
chain->dev->intfnum, ctrl->info.selector,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES),
ctrl->info.size);
if (ret < 0) {
if (UVC_ENTITY_TYPE(ctrl->entity) !=
UVC_VC_EXTENSION_UNIT)
return ret;
uvc_warn_once(chain->dev, UVC_WARN_XU_GET_RES,
"UVC non compliance - GET_RES failed on "
"an XU control. Enabling workaround.\n");
memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES), 0,
ctrl->info.size);
}
}
ctrl->cached = 1;
return 0;
}
static int __uvc_ctrl_load_cur(struct uvc_video_chain *chain,
struct uvc_control *ctrl)
{
u8 *data;
int ret;
if (ctrl->loaded)
return 0;
data = uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT);
if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0) {
memset(data, 0, ctrl->info.size);
ctrl->loaded = 1;
return 0;
}
if (ctrl->entity->get_cur)
ret = ctrl->entity->get_cur(chain->dev, ctrl->entity,
ctrl->info.selector, data,
ctrl->info.size);
else
ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR,
ctrl->entity->id, chain->dev->intfnum,
ctrl->info.selector, data,
ctrl->info.size);
if (ret < 0)
return ret;
ctrl->loaded = 1;
return ret;
}
static int __uvc_ctrl_get(struct uvc_video_chain *chain,
struct uvc_control *ctrl,
struct uvc_control_mapping *mapping,
s32 *value)
{
int ret;
if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) == 0)
return -EACCES;
ret = __uvc_ctrl_load_cur(chain, ctrl);
if (ret < 0)
return ret;
*value = uvc_mapping_get_s32(mapping, UVC_GET_CUR,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT));
return 0;
}
static int __uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id,
u32 found_id)
{
bool find_next = req_id &
(V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND);
unsigned int i;
req_id &= V4L2_CTRL_ID_MASK;
for (i = 0; i < ARRAY_SIZE(uvc_control_classes); i++) {
if (!(chain->ctrl_class_bitmap & BIT(i)))
continue;
if (!find_next) {
if (uvc_control_classes[i] == req_id)
return i;
continue;
}
if (uvc_control_classes[i] > req_id &&
uvc_control_classes[i] < found_id)
return i;
}
return -ENODEV;
}
static int uvc_query_v4l2_class(struct uvc_video_chain *chain, u32 req_id,
u32 found_id,
struct v4l2_query_ext_ctrl *v4l2_ctrl)
{
int idx;
idx = __uvc_query_v4l2_class(chain, req_id, found_id);
if (idx < 0)
return -ENODEV;
memset(v4l2_ctrl, 0, sizeof(*v4l2_ctrl));
v4l2_ctrl->id = uvc_control_classes[idx];
strscpy(v4l2_ctrl->name, v4l2_ctrl_get_name(v4l2_ctrl->id),
sizeof(v4l2_ctrl->name));
v4l2_ctrl->type = V4L2_CTRL_TYPE_CTRL_CLASS;
v4l2_ctrl->flags = V4L2_CTRL_FLAG_WRITE_ONLY
| V4L2_CTRL_FLAG_READ_ONLY;
return 0;
}
static bool uvc_ctrl_is_readable(u32 which, struct uvc_control *ctrl,
struct uvc_control_mapping *mapping)
{
if (which == V4L2_CTRL_WHICH_CUR_VAL)
return !!(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR);
if (which == V4L2_CTRL_WHICH_DEF_VAL)
return !!(ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF);
switch (mapping->v4l2_type) {
case V4L2_CTRL_TYPE_MENU:
case V4L2_CTRL_TYPE_BOOLEAN:
case V4L2_CTRL_TYPE_BUTTON:
return true;
case V4L2_CTRL_TYPE_BITMASK:
return (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES) ||
(ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX);
default:
break;
}
if (which == V4L2_CTRL_WHICH_MIN_VAL)
return !!(ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN);
if (which == V4L2_CTRL_WHICH_MAX_VAL)
return !!(ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX);
return false;
}
int uvc_ctrl_is_accessible(struct uvc_video_chain *chain, u32 v4l2_id,
const struct v4l2_ext_controls *ctrls, u32 which,
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;
s32 val;
int ret;
int i;
bool is_which_min_max = which == V4L2_CTRL_WHICH_MIN_VAL ||
which == V4L2_CTRL_WHICH_MAX_VAL;
if (__uvc_query_v4l2_class(chain, v4l2_id, 0) >= 0)
return is_which_min_max ? -EINVAL : -EACCES;
ctrl = uvc_find_control(chain, v4l2_id, &mapping);
if (!ctrl)
return -EINVAL;
if ((!(ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN) ||
!(ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX)) && is_which_min_max)
return -EINVAL;
if (ioctl == VIDIOC_G_EXT_CTRLS)
return uvc_ctrl_is_readable(ctrls->which, ctrl, mapping);
if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR))
return -EACCES;
if (ioctl != VIDIOC_S_EXT_CTRLS || !mapping->master_id)
return 0;
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, 0);
if (!master_ctrl || !(master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR))
return 0;
if (WARN_ON(uvc_ctrl_mapping_is_compound(master_map)))
return -EIO;
ret = __uvc_ctrl_get(chain, master_ctrl, master_map, &val);
if (ret >= 0 && val != mapping->master_manual)
return -EACCES;
return 0;
}
static const char *uvc_map_get_name(const struct uvc_control_mapping *map)
{
const char *name;
if (map->name)
return map->name;
name = v4l2_ctrl_get_name(map->id);
if (name)
return name;
return "Unknown Control";
}
static u32 uvc_get_ctrl_bitmap(struct uvc_control *ctrl,
struct uvc_control_mapping *mapping)
{
if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)
return uvc_mapping_get_s32(mapping, UVC_GET_RES,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES));
if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX)
return uvc_mapping_get_s32(mapping, UVC_GET_MAX,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX));
return ~0;
}
static bool uvc_ctrl_is_relative_ptz(__u32 ctrl_id)
{
switch (ctrl_id) {
case V4L2_CID_ZOOM_CONTINUOUS:
case V4L2_CID_PAN_SPEED:
case V4L2_CID_TILT_SPEED:
return true;
}
return false;
}
#define MAX_QUERY_RETRIES 2
static int __uvc_queryctrl_boundaries(struct uvc_video_chain *chain,
struct uvc_control *ctrl,
struct uvc_control_mapping *mapping,
struct v4l2_query_ext_ctrl *v4l2_ctrl)
{
if (!ctrl->cached) {
unsigned int retries;
int ret;
for (retries = 0; retries < MAX_QUERY_RETRIES; retries++) {
ret = uvc_ctrl_populate_cache(chain, ctrl);
if (ret != -EIO)
break;
}
if (ret)
return ret;
}
if (ctrl->info.flags & UVC_CTRL_FLAG_GET_DEF) {
v4l2_ctrl->default_value = uvc_mapping_get_s32(mapping,
UVC_GET_DEF, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_DEF));
}
switch (mapping->v4l2_type) {
case V4L2_CTRL_TYPE_MENU:
v4l2_ctrl->minimum = ffs(mapping->menu_mask) - 1;
v4l2_ctrl->maximum = fls(mapping->menu_mask) - 1;
v4l2_ctrl->step = 1;
return 0;
case V4L2_CTRL_TYPE_BOOLEAN:
v4l2_ctrl->minimum = 0;
v4l2_ctrl->maximum = 1;
v4l2_ctrl->step = 1;
return 0;
case V4L2_CTRL_TYPE_BUTTON:
v4l2_ctrl->minimum = 0;
v4l2_ctrl->maximum = 0;
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;
}
if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX)
v4l2_ctrl->maximum = uvc_mapping_get_s32(mapping, UVC_GET_MAX,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX));
else
v4l2_ctrl->maximum = 0;
if (ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN) {
if (uvc_ctrl_is_relative_ptz(v4l2_ctrl->id))
v4l2_ctrl->minimum = -v4l2_ctrl->maximum;
else
v4l2_ctrl->minimum = uvc_mapping_get_s32(mapping,
UVC_GET_MIN, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN));
} else {
v4l2_ctrl->minimum = 0;
}
if (ctrl->info.flags & UVC_CTRL_FLAG_GET_RES)
v4l2_ctrl->step = uvc_mapping_get_s32(mapping, UVC_GET_RES,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES));
else
v4l2_ctrl->step = 0;
return 0;
}
static size_t uvc_mapping_v4l2_size(struct uvc_control_mapping *mapping)
{
if (mapping->v4l2_type == V4L2_CTRL_TYPE_RECT)
return sizeof(struct v4l2_rect);
if (uvc_ctrl_mapping_is_compound(mapping))
return DIV_ROUND_UP(mapping->size, 8);
return sizeof(s32);
}
static int __uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
struct uvc_control *ctrl,
struct uvc_control_mapping *mapping,
struct v4l2_query_ext_ctrl *v4l2_ctrl)
{
struct uvc_control_mapping *master_map = NULL;
struct uvc_control *master_ctrl = NULL;
int ret;
memset(v4l2_ctrl, 0, sizeof(*v4l2_ctrl));
v4l2_ctrl->id = mapping->id;
v4l2_ctrl->type = mapping->v4l2_type;
strscpy(v4l2_ctrl->name, uvc_map_get_name(mapping),
sizeof(v4l2_ctrl->name));
v4l2_ctrl->flags = 0;
if (!(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR))
v4l2_ctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR))
v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_MAX) &&
(ctrl->info.flags & UVC_CTRL_FLAG_GET_MIN))
v4l2_ctrl->flags |= V4L2_CTRL_FLAG_HAS_WHICH_MIN_MAX;
if (mapping->master_id)
__uvc_find_control(ctrl->entity, mapping->master_id,
&master_map, &master_ctrl, 0, 0);
if (master_ctrl && (master_ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR)) {
unsigned int retries;
s32 val;
int ret;
if (WARN_ON(uvc_ctrl_mapping_is_compound(master_map)))
return -EIO;
for (retries = 0; retries < MAX_QUERY_RETRIES; retries++) {
ret = __uvc_ctrl_get(chain, master_ctrl, master_map,
&val);
if (!ret)
break;
if (ret < 0 && ret != -EIO)
return ret;
}
if (ret == -EIO) {
dev_warn_ratelimited(&chain->dev->intf->dev,
"UVC non compliance: Error %d querying master control %x (%s)\n",
ret, master_map->id,
uvc_map_get_name(master_map));
} else {
if (val != mapping->master_manual)
v4l2_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
}
}
v4l2_ctrl->elem_size = uvc_mapping_v4l2_size(mapping);
v4l2_ctrl->elems = 1;
if (v4l2_ctrl->type >= V4L2_CTRL_COMPOUND_TYPES) {
v4l2_ctrl->flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD;
v4l2_ctrl->default_value = 0;
v4l2_ctrl->minimum = 0;
v4l2_ctrl->maximum = 0;
v4l2_ctrl->step = 0;
return 0;
}
ret = __uvc_queryctrl_boundaries(chain, ctrl, mapping, v4l2_ctrl);
if (ret && !mapping->disabled) {
dev_warn(&chain->dev->intf->dev,
"UVC non compliance: permanently disabling control %x (%s), due to error %d\n",
mapping->id, uvc_map_get_name(mapping), ret);
mapping->disabled = true;
}
if (mapping->disabled)
v4l2_ctrl->flags |= V4L2_CTRL_FLAG_DISABLED;
return 0;
}
int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain,
struct v4l2_query_ext_ctrl *v4l2_ctrl)
{
struct uvc_control *ctrl;
struct uvc_control_mapping *mapping;
int ret;
ret = mutex_lock_interruptible(&chain->ctrl_mutex);
if (ret < 0)
return -ERESTARTSYS;
if (!(v4l2_ctrl->id & V4L2_CTRL_FLAG_NEXT_CTRL)) {
ret = uvc_query_v4l2_class(chain, v4l2_ctrl->id, 0, v4l2_ctrl);
if (!ret)
goto done;
}
ctrl = uvc_find_control(chain, v4l2_ctrl->id, &mapping);
if (ctrl == NULL) {
ret = -EINVAL;
goto done;
}
if (v4l2_ctrl->id & V4L2_CTRL_FLAG_NEXT_CTRL) {
ret = uvc_query_v4l2_class(chain, v4l2_ctrl->id, mapping->id,
v4l2_ctrl);
if (!ret)
goto done;
}
ret = __uvc_query_v4l2_ctrl(chain, ctrl, mapping, v4l2_ctrl);
done:
mutex_unlock(&chain->ctrl_mutex);
return ret;
}
int uvc_query_v4l2_menu(struct uvc_video_chain *chain,
struct v4l2_querymenu *query_menu)
{
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));
query_menu->id = id;
query_menu->index = index;
if (index >= BITS_PER_TYPE(mapping->menu_mask))
return -EINVAL;
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 (!test_bit(query_menu->index, &mapping->menu_mask)) {
ret = -EINVAL;
goto done;
}
if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK) {
int mask;
if (!ctrl->cached) {
ret = uvc_ctrl_populate_cache(chain, ctrl);
if (ret < 0)
goto done;
}
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;
}
}
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);
return ret;
}
static void uvc_ctrl_fill_event(struct uvc_video_chain *chain,
struct v4l2_event *ev,
struct uvc_control *ctrl,
struct uvc_control_mapping *mapping,
s32 value, u32 changes)
{
struct v4l2_query_ext_ctrl v4l2_ctrl;
__uvc_query_v4l2_ctrl(chain, ctrl, mapping, &v4l2_ctrl);
memset(ev, 0, sizeof(*ev));
ev->type = V4L2_EVENT_CTRL;
ev->id = v4l2_ctrl.id;
ev->u.ctrl.value = value;
ev->u.ctrl.changes = changes;
ev->u.ctrl.type = v4l2_ctrl.type;
ev->u.ctrl.flags = v4l2_ctrl.flags;
ev->u.ctrl.minimum = v4l2_ctrl.minimum;
ev->u.ctrl.maximum = v4l2_ctrl.maximum;
ev->u.ctrl.step = v4l2_ctrl.step;
ev->u.ctrl.default_value = v4l2_ctrl.default_value;
}
static void uvc_ctrl_send_event(struct uvc_video_chain *chain,
struct uvc_fh *handle, struct uvc_control *ctrl,
struct uvc_control_mapping *mapping, s32 value, u32 changes)
{
struct v4l2_fh *originator = handle ? &handle->vfh : NULL;
struct v4l2_subscribed_event *sev;
struct v4l2_event ev;
if (list_empty(&mapping->ev_subs))
return;
uvc_ctrl_fill_event(chain, &ev, ctrl, mapping, value, changes);
list_for_each_entry(sev, &mapping->ev_subs, node) {
if (sev->fh != originator ||
(sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK) ||
(changes & V4L2_EVENT_CTRL_CH_FLAGS))
v4l2_event_queue_fh(sev->fh, &ev);
}
}
static void uvc_ctrl_send_slave_event(struct uvc_video_chain *chain,
struct uvc_fh *handle, struct uvc_control *master, u32 slave_id)
{
struct uvc_control_mapping *mapping = NULL;
struct uvc_control *ctrl = NULL;
u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
s32 val = 0;
__uvc_find_control(master->entity, slave_id, &mapping, &ctrl, 0, 0);
if (ctrl == NULL)
return;
if (uvc_ctrl_mapping_is_compound(mapping) ||
__uvc_ctrl_get(chain, ctrl, mapping, &val) == 0)
changes |= V4L2_EVENT_CTRL_CH_VALUE;
uvc_ctrl_send_event(chain, handle, ctrl, mapping, val, changes);
}
static int uvc_ctrl_set_handle(struct uvc_control *ctrl, struct uvc_fh *handle)
{
int ret;
lockdep_assert_held(&handle->chain->ctrl_mutex);
if (ctrl->handle) {
dev_warn_ratelimited(&handle->stream->dev->intf->dev,
"UVC non compliance: Setting an async control with a pending operation.");
if (ctrl->handle == handle)
return 0;
WARN_ON(!ctrl->handle->pending_async_ctrls);
if (ctrl->handle->pending_async_ctrls)
ctrl->handle->pending_async_ctrls--;
ctrl->handle = handle;
ctrl->handle->pending_async_ctrls++;
return 0;
}
ret = uvc_pm_get(handle->chain->dev);
if (ret)
return ret;
ctrl->handle = handle;
ctrl->handle->pending_async_ctrls++;
return 0;
}
static int uvc_ctrl_clear_handle(struct uvc_control *ctrl)
{
lockdep_assert_held(&ctrl->handle->chain->ctrl_mutex);
if (WARN_ON(!ctrl->handle->pending_async_ctrls)) {
ctrl->handle = NULL;
return -EINVAL;
}
ctrl->handle->pending_async_ctrls--;
uvc_pm_put(ctrl->handle->chain->dev);
ctrl->handle = NULL;
return 0;
}
void uvc_ctrl_status_event(struct uvc_video_chain *chain,
struct uvc_control *ctrl, const u8 *data)
{
struct uvc_control_mapping *mapping;
struct uvc_fh *handle;
unsigned int i;
mutex_lock(&chain->ctrl_mutex);
ctrl->loaded = 0;
handle = ctrl->handle;
if (handle)
uvc_ctrl_clear_handle(ctrl);
list_for_each_entry(mapping, &ctrl->info.mappings, list) {
s32 value;
if (uvc_ctrl_mapping_is_compound(mapping))
value = 0;
else
value = uvc_mapping_get_s32(mapping, UVC_GET_CUR, data);
for (i = 0; i < ARRAY_SIZE(mapping->slave_ids); ++i) {
if (!mapping->slave_ids[i])
break;
uvc_ctrl_send_slave_event(chain, handle, ctrl,
mapping->slave_ids[i]);
}
uvc_ctrl_send_event(chain, handle, ctrl, mapping, value,
V4L2_EVENT_CTRL_CH_VALUE);
}
mutex_unlock(&chain->ctrl_mutex);
}
static void uvc_ctrl_status_event_work(struct work_struct *work)
{
struct uvc_device *dev = container_of(work, struct uvc_device,
async_ctrl.work);
struct uvc_ctrl_work *w = &dev->async_ctrl;
int ret;
uvc_ctrl_status_event(w->chain, w->ctrl, w->data);
if (smp_load_acquire(&dev->flush_status))
return;
w->urb->interval = dev->int_ep->desc.bInterval;
ret = usb_submit_urb(w->urb, GFP_KERNEL);
if (ret < 0)
dev_err(&dev->intf->dev,
"Failed to resubmit status URB (%d).\n", ret);
}
bool uvc_ctrl_status_event_async(struct urb *urb, struct uvc_video_chain *chain,
struct uvc_control *ctrl, const u8 *data)
{
struct uvc_device *dev = chain->dev;
struct uvc_ctrl_work *w = &dev->async_ctrl;
if (list_empty(&ctrl->info.mappings))
return false;
w->data = data;
w->urb = urb;
w->chain = chain;
w->ctrl = ctrl;
schedule_work(&w->work);
return true;
}
static bool uvc_ctrl_xctrls_has_control(const struct v4l2_ext_control *xctrls,
unsigned int xctrls_count, u32 id)
{
unsigned int i;
for (i = 0; i < xctrls_count; ++i) {
if (xctrls[i].id == id)
return true;
}
return false;
}
static void uvc_ctrl_send_events(struct uvc_fh *handle,
struct uvc_entity *entity,
const struct v4l2_ext_control *xctrls,
unsigned int xctrls_count)
{
struct uvc_control_mapping *mapping;
struct uvc_control *ctrl;
unsigned int i;
unsigned int j;
for (i = 0; i < xctrls_count; ++i) {
u32 changes = V4L2_EVENT_CTRL_CH_VALUE;
s32 value;
ctrl = uvc_find_control(handle->chain, xctrls[i].id, &mapping);
if (ctrl->entity != entity)
continue;
if (ctrl->info.flags & UVC_CTRL_FLAG_ASYNCHRONOUS)
continue;
for (j = 0; j < ARRAY_SIZE(mapping->slave_ids); ++j) {
u32 slave_id = mapping->slave_ids[j];
if (!slave_id)
break;
if (uvc_ctrl_xctrls_has_control(xctrls, xctrls_count,
slave_id))
continue;
uvc_ctrl_send_slave_event(handle->chain, handle, ctrl,
slave_id);
}
if (uvc_ctrl_mapping_is_compound(mapping))
value = 0;
else
value = xctrls[i].value;
if (mapping->master_id &&
uvc_ctrl_xctrls_has_control(xctrls, xctrls_count,
mapping->master_id))
changes |= V4L2_EVENT_CTRL_CH_FLAGS;
uvc_ctrl_send_event(handle->chain, handle, ctrl, mapping,
value, changes);
}
}
static int uvc_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
{
struct uvc_fh *handle = container_of(sev->fh, struct uvc_fh, vfh);
struct uvc_control_mapping *mapping;
struct uvc_control *ctrl;
int ret;
ret = mutex_lock_interruptible(&handle->chain->ctrl_mutex);
if (ret < 0)
return -ERESTARTSYS;
if (__uvc_query_v4l2_class(handle->chain, sev->id, 0) >= 0) {
ret = 0;
goto done;
}
ctrl = uvc_find_control(handle->chain, sev->id, &mapping);
if (ctrl == NULL) {
ret = -EINVAL;
goto done;
}
if (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL) {
struct v4l2_event ev;
u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
s32 val = 0;
ret = uvc_pm_get(handle->chain->dev);
if (ret)
goto done;
if (uvc_ctrl_mapping_is_compound(mapping) ||
__uvc_ctrl_get(handle->chain, ctrl, mapping, &val) == 0)
changes |= V4L2_EVENT_CTRL_CH_VALUE;
uvc_ctrl_fill_event(handle->chain, &ev, ctrl, mapping, val,
changes);
uvc_pm_put(handle->chain->dev);
sev->elems = elems;
v4l2_event_queue_fh(sev->fh, &ev);
}
list_add_tail(&sev->node, &mapping->ev_subs);
done:
mutex_unlock(&handle->chain->ctrl_mutex);
return ret;
}
static void uvc_ctrl_del_event(struct v4l2_subscribed_event *sev)
{
struct uvc_fh *handle = container_of(sev->fh, struct uvc_fh, vfh);
mutex_lock(&handle->chain->ctrl_mutex);
if (__uvc_query_v4l2_class(handle->chain, sev->id, 0) >= 0)
goto done;
list_del(&sev->node);
done:
mutex_unlock(&handle->chain->ctrl_mutex);
}
const struct v4l2_subscribed_event_ops uvc_ctrl_sub_ev_ops = {
.add = uvc_ctrl_add_event,
.del = uvc_ctrl_del_event,
.replace = v4l2_ctrl_replace,
.merge = v4l2_ctrl_merge,
};
int uvc_ctrl_begin(struct uvc_video_chain *chain)
{
return mutex_lock_interruptible(&chain->ctrl_mutex) ? -ERESTARTSYS : 0;
}
static int uvc_ctrl_commit_entity(struct uvc_device *dev,
struct uvc_fh *handle,
struct uvc_entity *entity,
int rollback,
struct uvc_control **err_ctrl)
{
unsigned int processed_ctrls = 0;
struct uvc_control *ctrl;
unsigned int i;
int ret = 0;
if (entity == NULL)
return 0;
for (i = 0; i < entity->ncontrols; ++i) {
ctrl = &entity->controls[i];
if (!ctrl->initialized)
continue;
if (ctrl->info.flags & UVC_CTRL_FLAG_AUTO_UPDATE ||
!(ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR))
ctrl->loaded = 0;
if (!ctrl->dirty)
continue;
if (!rollback)
ret = uvc_query_ctrl(dev, UVC_SET_CUR, ctrl->entity->id,
dev->intfnum, ctrl->info.selector,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT),
ctrl->info.size);
if (!ret)
processed_ctrls++;
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->dirty = 0;
if (!rollback && handle && !ret &&
ctrl->info.flags & UVC_CTRL_FLAG_ASYNCHRONOUS)
ret = uvc_ctrl_set_handle(ctrl, handle);
if (ret < 0 && !rollback) {
if (err_ctrl)
*err_ctrl = ctrl;
rollback = 1;
}
}
if (ret)
return ret;
return processed_ctrls;
}
static int uvc_ctrl_find_ctrl_idx(struct uvc_entity *entity,
struct v4l2_ext_controls *ctrls,
struct uvc_control *uvc_control)
{
struct uvc_control_mapping *mapping = NULL;
struct uvc_control *ctrl_found = NULL;
unsigned int i;
if (!entity)
return ctrls->count;
for (i = 0; i < ctrls->count; i++) {
__uvc_find_control(entity, ctrls->controls[i].id, &mapping,
&ctrl_found, 0, 0);
if (uvc_control == ctrl_found)
return i;
}
return ctrls->count;
}
int __uvc_ctrl_commit(struct uvc_fh *handle, int rollback,
struct v4l2_ext_controls *ctrls)
{
struct uvc_video_chain *chain = handle->chain;
struct uvc_control *err_ctrl;
struct uvc_entity *entity;
int ret_out = 0;
int ret;
list_for_each_entry(entity, &chain->entities, chain) {
ret = uvc_ctrl_commit_entity(chain->dev, handle, entity,
rollback, &err_ctrl);
if (ret < 0) {
if (ctrls)
ctrls->error_idx =
uvc_ctrl_find_ctrl_idx(entity, ctrls,
err_ctrl);
rollback = 1;
ret_out = ret;
} else if (ret > 0 && !rollback) {
uvc_ctrl_send_events(handle, entity,
ctrls->controls, ctrls->count);
}
}
mutex_unlock(&chain->ctrl_mutex);
return ret_out;
}
static int uvc_mapping_get_xctrl_compound(struct uvc_video_chain *chain,
struct uvc_control *ctrl,
struct uvc_control_mapping *mapping,
u32 which,
struct v4l2_ext_control *xctrl)
{
u8 *data __free(kfree) = NULL;
size_t size;
u8 query;
int ret;
int id;
switch (which) {
case V4L2_CTRL_WHICH_CUR_VAL:
id = UVC_CTRL_DATA_CURRENT;
query = UVC_GET_CUR;
break;
case V4L2_CTRL_WHICH_MIN_VAL:
id = UVC_CTRL_DATA_MIN;
query = UVC_GET_MIN;
break;
case V4L2_CTRL_WHICH_MAX_VAL:
id = UVC_CTRL_DATA_MAX;
query = UVC_GET_MAX;
break;
case V4L2_CTRL_WHICH_DEF_VAL:
id = UVC_CTRL_DATA_DEF;
query = UVC_GET_DEF;
break;
default:
return -EINVAL;
}
size = uvc_mapping_v4l2_size(mapping);
if (xctrl->size < size) {
xctrl->size = size;
return -ENOSPC;
}
data = kmalloc(size, GFP_KERNEL);
if (!data)
return -ENOMEM;
if (which == V4L2_CTRL_WHICH_CUR_VAL)
ret = __uvc_ctrl_load_cur(chain, ctrl);
else
ret = uvc_ctrl_populate_cache(chain, ctrl);
if (ret < 0)
return ret;
ret = mapping->get(mapping, query, uvc_ctrl_data(ctrl, id), size, data);
if (ret < 0)
return ret;
return copy_to_user(xctrl->ptr, data, size) ? -EFAULT : 0;
}
static int uvc_mapping_get_xctrl_std(struct uvc_video_chain *chain,
struct uvc_control *ctrl,
struct uvc_control_mapping *mapping,
u32 which, struct v4l2_ext_control *xctrl)
{
struct v4l2_query_ext_ctrl qec;
int ret;
switch (which) {
case V4L2_CTRL_WHICH_CUR_VAL:
return __uvc_ctrl_get(chain, ctrl, mapping, &xctrl->value);
case V4L2_CTRL_WHICH_DEF_VAL:
case V4L2_CTRL_WHICH_MIN_VAL:
case V4L2_CTRL_WHICH_MAX_VAL:
break;
default:
return -EINVAL;
}
ret = __uvc_queryctrl_boundaries(chain, ctrl, mapping, &qec);
if (ret < 0)
return ret;
switch (which) {
case V4L2_CTRL_WHICH_DEF_VAL:
xctrl->value = qec.default_value;
break;
case V4L2_CTRL_WHICH_MIN_VAL:
xctrl->value = qec.minimum;
break;
case V4L2_CTRL_WHICH_MAX_VAL:
xctrl->value = qec.maximum;
break;
}
return 0;
}
static int uvc_mapping_get_xctrl(struct uvc_video_chain *chain,
struct uvc_control *ctrl,
struct uvc_control_mapping *mapping,
u32 which, struct v4l2_ext_control *xctrl)
{
if (uvc_ctrl_mapping_is_compound(mapping))
return uvc_mapping_get_xctrl_compound(chain, ctrl, mapping,
which, xctrl);
return uvc_mapping_get_xctrl_std(chain, ctrl, mapping, which, xctrl);
}
int uvc_ctrl_get(struct uvc_video_chain *chain, u32 which,
struct v4l2_ext_control *xctrl)
{
struct uvc_control *ctrl;
struct uvc_control_mapping *mapping;
if (__uvc_query_v4l2_class(chain, xctrl->id, 0) >= 0)
return -EACCES;
ctrl = uvc_find_control(chain, xctrl->id, &mapping);
if (!ctrl)
return -EINVAL;
return uvc_mapping_get_xctrl(chain, ctrl, mapping, which, xctrl);
}
static int uvc_ctrl_clamp(struct uvc_video_chain *chain,
struct uvc_control *ctrl,
u32 v4l2_id,
struct uvc_control_mapping *mapping,
s32 *value_in_out)
{
s32 value = *value_in_out;
u32 step;
s32 min;
s32 max;
int ret;
switch (mapping->v4l2_type) {
case V4L2_CTRL_TYPE_INTEGER:
if (!ctrl->cached) {
ret = uvc_ctrl_populate_cache(chain, ctrl);
if (ret < 0)
return ret;
}
max = uvc_mapping_get_s32(mapping, UVC_GET_MAX,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MAX));
if (uvc_ctrl_is_relative_ptz(v4l2_id))
min = -max;
else
min = uvc_mapping_get_s32(mapping, UVC_GET_MIN,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_MIN));
step = uvc_mapping_get_s32(mapping, UVC_GET_RES,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_RES));
if (step == 0)
step = 1;
value = min + DIV_ROUND_CLOSEST((u32)(value - min), step) * step;
if (mapping->data_type == UVC_CTRL_DATA_TYPE_SIGNED)
value = clamp(value, min, max);
else
value = clamp_t(u32, value, min, max);
*value_in_out = value;
return 0;
case V4L2_CTRL_TYPE_BITMASK:
if (!ctrl->cached) {
ret = uvc_ctrl_populate_cache(chain, ctrl);
if (ret < 0)
return ret;
}
value &= uvc_get_ctrl_bitmap(ctrl, mapping);
*value_in_out = value;
return 0;
case V4L2_CTRL_TYPE_BOOLEAN:
*value_in_out = clamp(value, 0, 1);
return 0;
case V4L2_CTRL_TYPE_MENU:
if (value < (ffs(mapping->menu_mask) - 1) ||
value > (fls(mapping->menu_mask) - 1))
return -ERANGE;
if (!test_bit(value, &mapping->menu_mask))
return -EINVAL;
if (mapping->data_type == UVC_CTRL_DATA_TYPE_BITMASK) {
int val = uvc_mapping_get_menu_value(mapping, value);
if (!ctrl->cached) {
ret = uvc_ctrl_populate_cache(chain, ctrl);
if (ret < 0)
return ret;
}
if (!(uvc_get_ctrl_bitmap(ctrl, mapping) & val))
return -EINVAL;
}
return 0;
default:
return 0;
}
return 0;
}
static int uvc_mapping_set_xctrl_compound(struct uvc_control *ctrl,
struct uvc_control_mapping *mapping,
struct v4l2_ext_control *xctrl)
{
u8 *data __free(kfree) = NULL;
size_t size = uvc_mapping_v4l2_size(mapping);
if (xctrl->size != size)
return -EINVAL;
data = memdup_user(xctrl->ptr, size);
if (IS_ERR(data))
return PTR_ERR(data);
return mapping->set(mapping, size, data,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT));
}
static int uvc_mapping_set_xctrl(struct uvc_control *ctrl,
struct uvc_control_mapping *mapping,
struct v4l2_ext_control *xctrl)
{
if (uvc_ctrl_mapping_is_compound(mapping))
return uvc_mapping_set_xctrl_compound(ctrl, mapping, xctrl);
uvc_mapping_set_s32(mapping, xctrl->value,
uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT));
return 0;
}
int uvc_ctrl_set(struct uvc_fh *handle, struct v4l2_ext_control *xctrl)
{
struct uvc_video_chain *chain = handle->chain;
struct uvc_control_mapping *mapping;
struct uvc_control *ctrl;
int ret;
lockdep_assert_held(&chain->ctrl_mutex);
if (__uvc_query_v4l2_class(chain, xctrl->id, 0) >= 0)
return -EACCES;
ctrl = uvc_find_control(chain, xctrl->id, &mapping);
if (!ctrl)
return -EINVAL;
if (!(ctrl->info.flags & UVC_CTRL_FLAG_SET_CUR))
return -EACCES;
ret = uvc_ctrl_clamp(chain, ctrl, xctrl->id, mapping, &xctrl->value);
if (ret)
return ret;
if ((ctrl->info.size * 8) != mapping->size) {
ret = __uvc_ctrl_load_cur(chain, ctrl);
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);
}
ret = uvc_mapping_set_xctrl(ctrl, mapping, xctrl);
if (ret)
return ret;
ctrl->dirty = 1;
ctrl->modified = 1;
return 0;
}
static int uvc_ctrl_get_flags(struct uvc_device *dev,
const struct uvc_control *ctrl,
struct uvc_control_info *info)
{
u8 *data;
int ret;
data = kmalloc(1, GFP_KERNEL);
if (data == NULL)
return -ENOMEM;
if (ctrl->entity->get_info)
ret = ctrl->entity->get_info(dev, ctrl->entity,
ctrl->info.selector, data);
else
ret = uvc_query_ctrl(dev, UVC_GET_INFO, ctrl->entity->id,
dev->intfnum, info->selector, data, 1);
if (!ret) {
info->flags &= ~(UVC_CTRL_FLAG_GET_CUR |
UVC_CTRL_FLAG_SET_CUR |
UVC_CTRL_FLAG_AUTO_UPDATE |
UVC_CTRL_FLAG_ASYNCHRONOUS);
info->flags |= (data[0] & UVC_CONTROL_CAP_GET ?
UVC_CTRL_FLAG_GET_CUR : 0)
| (data[0] & UVC_CONTROL_CAP_SET ?
UVC_CTRL_FLAG_SET_CUR : 0)
| (data[0] & UVC_CONTROL_CAP_AUTOUPDATE ?
UVC_CTRL_FLAG_AUTO_UPDATE : 0)
| (data[0] & UVC_CONTROL_CAP_ASYNCHRONOUS ?
UVC_CTRL_FLAG_ASYNCHRONOUS : 0);
}
kfree(data);
return ret;
}
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_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX |
UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR |
UVC_CTRL_FLAG_AUTO_UPDATE },
{ { USB_DEVICE(0x046d, 0x08cc) }, 9, 1,
UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX |
UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR |
UVC_CTRL_FLAG_AUTO_UPDATE },
{ { USB_DEVICE(0x046d, 0x0994) }, 9, 1,
UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX |
UVC_CTRL_FLAG_GET_DEF | UVC_CTRL_FLAG_SET_CUR |
UVC_CTRL_FLAG_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;
}
}
}
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->guid, sizeof(info->entity));
info->index = ctrl->index;
info->selector = ctrl->index + 1;
ret = uvc_query_ctrl(dev, UVC_GET_LEN, ctrl->entity->id, dev->intfnum,
info->selector, data, 2);
if (ret < 0) {
uvc_dbg(dev, CONTROL,
"GET_LEN failed on control %pUl/%u (%d)\n",
info->entity, info->selector, ret);
goto done;
}
info->size = le16_to_cpup((__le16 *)data);
info->flags = UVC_CTRL_FLAG_GET_MIN | UVC_CTRL_FLAG_GET_MAX
| UVC_CTRL_FLAG_GET_RES | UVC_CTRL_FLAG_GET_DEF;
ret = uvc_ctrl_get_flags(dev, ctrl, info);
if (ret < 0) {
uvc_dbg(dev, CONTROL,
"Failed to get flags for control %pUl/%u (%d)\n",
info->entity, info->selector, ret);
goto done;
}
uvc_ctrl_fixup_xu_info(dev, ctrl, info);
uvc_dbg(dev, 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_CTRL_FLAG_GET_CUR) ? 1 : 0,
(info->flags & UVC_CTRL_FLAG_SET_CUR) ? 1 : 0,
(info->flags & UVC_CTRL_FLAG_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_dbg(dev, 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_query *xqry)
{
struct uvc_entity *entity, *iter;
struct uvc_control *ctrl;
unsigned int i;
bool found;
u32 reqflags;
u16 size;
u8 *data = NULL;
int ret;
entity = NULL;
list_for_each_entry(iter, &chain->entities, chain) {
if (UVC_ENTITY_TYPE(iter) == UVC_VC_EXTENSION_UNIT &&
iter->id == xqry->unit) {
entity = iter;
break;
}
}
if (!entity) {
uvc_dbg(chain->dev, CONTROL, "Extension unit %u not found\n",
xqry->unit);
return -ENOENT;
}
found = false;
for (i = 0; i < entity->ncontrols; ++i) {
ctrl = &entity->controls[i];
if (ctrl->index == xqry->selector - 1) {
found = true;
break;
}
}
if (!found) {
uvc_dbg(chain->dev, CONTROL, "Control %pUl/%u not found\n",
entity->guid, xqry->selector);
return -ENOENT;
}
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;
}
reqflags = 0;
size = ctrl->info.size;
switch (xqry->query) {
case UVC_GET_CUR:
reqflags = UVC_CTRL_FLAG_GET_CUR;
break;
case UVC_GET_MIN:
reqflags = UVC_CTRL_FLAG_GET_MIN;
break;
case UVC_GET_MAX:
reqflags = UVC_CTRL_FLAG_GET_MAX;
break;
case UVC_GET_DEF:
reqflags = UVC_CTRL_FLAG_GET_DEF;
break;
case UVC_GET_RES:
reqflags = UVC_CTRL_FLAG_GET_RES;
break;
case UVC_SET_CUR:
reqflags = UVC_CTRL_FLAG_SET_CUR;
break;
case UVC_GET_LEN:
size = 2;
break;
case UVC_GET_INFO:
size = 1;
break;
default:
ret = -EINVAL;
goto done;
}
if (size != xqry->size) {
ret = -ENOBUFS;
goto done;
}
if (reqflags && !(ctrl->info.flags & reqflags)) {
ret = -EBADRQC;
goto done;
}
data = kmalloc(size, GFP_KERNEL);
if (data == NULL) {
ret = -ENOMEM;
goto done;
}
if (xqry->query == UVC_SET_CUR &&
copy_from_user(data, xqry->data, size)) {
ret = -EFAULT;
goto done;
}
ret = uvc_query_ctrl(chain->dev, xqry->query, xqry->unit,
chain->dev->intfnum, xqry->selector, data, size);
if (ret < 0)
goto done;
if (xqry->query != UVC_SET_CUR &&
copy_to_user(xqry->data, data, size))
ret = -EFAULT;
done:
kfree(data);
mutex_unlock(&chain->ctrl_mutex);
return ret;
}
int uvc_ctrl_restore_values(struct uvc_device *dev)
{
struct uvc_control *ctrl;
struct uvc_entity *entity;
unsigned int i;
int ret;
list_for_each_entry(entity, &dev->entities, list) {
for (i = 0; i < entity->ncontrols; ++i) {
ctrl = &entity->controls[i];
if (!ctrl->initialized || !ctrl->modified ||
(ctrl->info.flags & UVC_CTRL_FLAG_RESTORE) == 0)
continue;
uvc_dbg(dev, CONTROL, "restoring control %pUl/%u/%u\n",
ctrl->info.entity, ctrl->info.index,
ctrl->info.selector);
ctrl->dirty = 1;
}
ret = uvc_ctrl_commit_entity(dev, NULL, entity, 0, NULL);
if (ret < 0)
return ret;
}
return 0;
}
static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl,
const struct uvc_control_info *info)
{
ctrl->info = *info;
INIT_LIST_HEAD(&ctrl->info.mappings);
ctrl->uvc_data = kzalloc(ctrl->info.size * UVC_CTRL_DATA_LAST + 1,
GFP_KERNEL);
if (!ctrl->uvc_data)
return -ENOMEM;
ctrl->initialized = 1;
uvc_dbg(dev, CONTROL, "Added control %pUl/%u to device %s entity %u\n",
ctrl->info.entity, ctrl->info.selector, dev->udev->devpath,
ctrl->entity->id);
return 0;
}
static int __uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
struct uvc_control *ctrl, const struct uvc_control_mapping *mapping)
{
struct uvc_control_mapping *map;
unsigned int size;
unsigned int i;
int ret;
map = kmemdup(mapping, sizeof(*mapping), GFP_KERNEL);
if (!map)
return -ENOMEM;
map->name = NULL;
map->menu_names = NULL;
map->menu_mapping = NULL;
if (mapping->name) {
map->name = kstrdup(mapping->name, GFP_KERNEL);
if (!map->name)
goto err_nomem;
}
INIT_LIST_HEAD(&map->ev_subs);
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 (uvc_ctrl_mapping_is_compound(map))
if (WARN_ON(!map->set || !map->get)) {
ret = -EIO;
goto free_mem;
}
if (map->get == NULL)
map->get = uvc_get_le_value;
if (map->set == NULL)
map->set = uvc_set_le_value;
for (i = 0; i < ARRAY_SIZE(uvc_control_classes); i++) {
if (V4L2_CTRL_ID2WHICH(uvc_control_classes[i]) ==
V4L2_CTRL_ID2WHICH(map->id)) {
chain->ctrl_class_bitmap |= BIT(i);
break;
}
}
list_add_tail(&map->list, &ctrl->info.mappings);
uvc_dbg(chain->dev, CONTROL, "Adding mapping '%s' to control %pUl/%u\n",
uvc_map_get_name(map), ctrl->info.entity,
ctrl->info.selector);
return 0;
err_nomem:
ret = -ENOMEM;
free_mem:
kfree(map->menu_names);
kfree(map->menu_mapping);
kfree(map->name);
kfree(map);
return ret;
}
int uvc_ctrl_add_mapping(struct uvc_video_chain *chain,
const struct uvc_control_mapping *mapping)
{
struct uvc_device *dev = chain->dev;
struct uvc_control_mapping *map;
struct uvc_entity *entity;
struct uvc_control *ctrl;
int found = 0;
int ret;
if (mapping->id & ~V4L2_CTRL_ID_MASK) {
uvc_dbg(dev, CONTROL,
"Can't add mapping '%s', control id 0x%08x is invalid\n",
uvc_map_get_name(mapping), mapping->id);
return -EINVAL;
}
list_for_each_entry(entity, &chain->entities, chain) {
unsigned int i;
if (UVC_ENTITY_TYPE(entity) != UVC_VC_EXTENSION_UNIT ||
!uvc_entity_match_guid(entity, mapping->entity))
continue;
for (i = 0; i < entity->ncontrols; ++i) {
ctrl = &entity->controls[i];
if (ctrl->index == mapping->selector - 1) {
found = 1;
break;
}
}
if (found)
break;
}
if (!found)
return -ENOENT;
if (mutex_lock_interruptible(&chain->ctrl_mutex))
return -ERESTARTSYS;
ret = uvc_ctrl_init_xu_ctrl(dev, ctrl);
if (ret < 0) {
ret = -ENOENT;
goto done;
}
if (mapping->size > 32 ||
mapping->offset + mapping->size > ctrl->info.size * 8) {
ret = -EINVAL;
goto done;
}
list_for_each_entry(map, &ctrl->info.mappings, list) {
if (mapping->id == map->id) {
uvc_dbg(dev, CONTROL,
"Can't add mapping '%s', control id 0x%08x already exists\n",
uvc_map_get_name(mapping), mapping->id);
ret = -EEXIST;
goto done;
}
}
if (atomic_inc_return(&dev->nmappings) > UVC_MAX_CONTROL_MAPPINGS) {
atomic_dec(&dev->nmappings);
uvc_dbg(dev, CONTROL,
"Can't add mapping '%s', maximum mappings count (%u) exceeded\n",
uvc_map_get_name(mapping), UVC_MAX_CONTROL_MAPPINGS);
ret = -ENOMEM;
goto done;
}
ret = __uvc_ctrl_add_mapping(chain, ctrl, mapping);
if (ret < 0)
atomic_dec(&dev->nmappings);
done:
mutex_unlock(&chain->ctrl_mutex);
return ret;
}
static void uvc_ctrl_prune_entity(struct uvc_device *dev,
struct uvc_entity *entity)
{
struct uvc_ctrl_blacklist {
struct usb_device_id id;
u8 index;
};
static const struct uvc_ctrl_blacklist processing_blacklist[] = {
{ { USB_DEVICE(0x13d3, 0x509b) }, 9 },
{ { USB_DEVICE(0x1c4f, 0x3000) }, 6 },
{ { USB_DEVICE(0x5986, 0x0241) }, 2 },
};
static const struct uvc_ctrl_blacklist camera_blacklist[] = {
{ { USB_DEVICE(0x06f8, 0x3005) }, 9 },
};
const struct uvc_ctrl_blacklist *blacklist;
unsigned int size;
unsigned int count;
unsigned int i;
u8 *controls;
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;
default:
return;
}
for (i = 0; i < count; ++i) {
if (!usb_match_one_id(dev->intf, &blacklist[i].id))
continue;
if (blacklist[i].index >= 8 * size ||
!uvc_test_bit(controls, blacklist[i].index))
continue;
uvc_dbg(dev, CONTROL,
"%u/%u control is black listed, removing it\n",
entity->id, blacklist[i].index);
uvc_clear_bit(controls, blacklist[i].index);
}
}
static void uvc_ctrl_init_ctrl(struct uvc_video_chain *chain,
struct uvc_control *ctrl)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(uvc_ctrls); ++i) {
const struct uvc_control_info *info = &uvc_ctrls[i];
if (uvc_entity_match_guid(ctrl->entity, info->entity) &&
ctrl->index == info->index) {
uvc_ctrl_add_info(chain->dev, ctrl, info);
uvc_ctrl_get_flags(chain->dev, ctrl, &ctrl->info);
break;
}
}
if (!ctrl->initialized)
return;
for (i = 0; i < ARRAY_SIZE(uvc_ctrl_mappings); ++i) {
const struct uvc_control_mapping *mapping = &uvc_ctrl_mappings[i];
if (!uvc_entity_match_guid(ctrl->entity, mapping->entity) ||
ctrl->info.selector != mapping->selector)
continue;
if (mapping->filter_mapping) {
mapping = mapping->filter_mapping(chain, ctrl);
if (!mapping)
continue;
}
__uvc_ctrl_add_mapping(chain, ctrl, mapping);
}
}
static int uvc_ctrl_init_chain(struct uvc_video_chain *chain)
{
struct uvc_entity *entity;
unsigned int i;
list_for_each_entry(entity, &chain->entities, chain) {
struct uvc_control *ctrl;
unsigned int bControlSize = 0, ncontrols;
u8 *bmControls = NULL;
if (UVC_ENTITY_TYPE(entity) == UVC_VC_EXTENSION_UNIT) {
bmControls = entity->extension.bmControls;
bControlSize = entity->extension.bControlSize;
} else if (UVC_ENTITY_TYPE(entity) == UVC_VC_PROCESSING_UNIT) {
bmControls = entity->processing.bmControls;
bControlSize = entity->processing.bControlSize;
} else if (UVC_ENTITY_TYPE(entity) == UVC_ITT_CAMERA) {
bmControls = entity->camera.bmControls;
bControlSize = entity->camera.bControlSize;
} else if (UVC_ENTITY_TYPE(entity) == UVC_EXT_GPIO_UNIT) {
bmControls = entity->gpio.bmControls;
bControlSize = entity->gpio.bControlSize;
}
uvc_ctrl_prune_entity(chain->dev, entity);
ncontrols = memweight(bmControls, bControlSize);
if (ncontrols == 0)
continue;
entity->controls = kzalloc_objs(*ctrl, ncontrols);
if (entity->controls == NULL)
return -ENOMEM;
entity->ncontrols = ncontrols;
ctrl = entity->controls;
for (i = 0; i < bControlSize * 8; ++i) {
if (uvc_test_bit(bmControls, i) == 0)
continue;
ctrl->entity = entity;
ctrl->index = i;
uvc_ctrl_init_ctrl(chain, ctrl);
ctrl++;
}
}
return 0;
}
int uvc_ctrl_init_device(struct uvc_device *dev)
{
struct uvc_video_chain *chain;
int ret;
INIT_WORK(&dev->async_ctrl.work, uvc_ctrl_status_event_work);
list_for_each_entry(chain, &dev->chains, list) {
ret = uvc_ctrl_init_chain(chain);
if (ret)
return ret;
}
return 0;
}
void uvc_ctrl_cleanup_fh(struct uvc_fh *handle)
{
struct uvc_entity *entity;
guard(mutex)(&handle->chain->ctrl_mutex);
if (!handle->pending_async_ctrls)
return;
list_for_each_entry(entity, &handle->chain->dev->entities, list) {
for (unsigned int i = 0; i < entity->ncontrols; ++i) {
if (entity->controls[i].handle != handle)
continue;
uvc_ctrl_clear_handle(&entity->controls[i]);
}
}
if (!WARN_ON(handle->pending_async_ctrls))
return;
for (unsigned int i = 0; i < handle->pending_async_ctrls; i++)
uvc_pm_put(handle->stream->dev);
}
static void uvc_ctrl_cleanup_mappings(struct uvc_device *dev,
struct uvc_control *ctrl)
{
struct uvc_control_mapping *mapping, *nm;
list_for_each_entry_safe(mapping, nm, &ctrl->info.mappings, list) {
list_del(&mapping->list);
kfree(mapping->menu_names);
kfree(mapping->menu_mapping);
kfree(mapping->name);
kfree(mapping);
}
}
void uvc_ctrl_cleanup_device(struct uvc_device *dev)
{
struct uvc_entity *entity;
unsigned int i;
if (dev->async_ctrl.work.func)
cancel_work_sync(&dev->async_ctrl.work);
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;
uvc_ctrl_cleanup_mappings(dev, ctrl);
kfree(ctrl->uvc_data);
}
kfree(entity->controls);
}
}
