Commit 46919a23 authored by Andrzej Pietrasiewicz's avatar Andrzej Pietrasiewicz Committed by Felipe Balbi

usb: gadget: uvc: configfs support in uvc function

Add support for using the uvc function as a component of USB gadgets composed
with configfs.
Acked-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: default avatarAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 6c25955e
What: /config/usb-gadget/gadget/functions/uvc.name
Date: Dec 2014
KernelVersion: 3.20
Description: UVC function directory
streaming_maxburst - 0..15 (ss only)
streaming_maxpacket - 1..1023 (fs), 1..3072 (hs/ss)
streaming_interval - 1..16
What: /config/usb-gadget/gadget/functions/uvc.name/control
Date: Dec 2014
KernelVersion: 3.20
Description: Control descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/control/class
Date: Dec 2014
KernelVersion: 3.20
Description: Class descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/control/class/ss
Date: Dec 2014
KernelVersion: 3.20
Description: Super speed control class descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/control/class/fs
Date: Dec 2014
KernelVersion: 3.20
Description: Full speed control class descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal
Date: Dec 2014
KernelVersion: 3.20
Description: Terminal descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/output
Date: Dec 2014
KernelVersion: 3.20
Description: Output terminal descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/output/default
Date: Dec 2014
KernelVersion: 3.20
Description: Default output terminal descriptors
All attributes read only:
iTerminal - index of string descriptor
bSourceID - id of the terminal to which this terminal
is connected
bAssocTerminal - id of the input terminal to which this output
terminal is associated
wTerminalType - terminal type
bTerminalID - a non-zero id of this terminal
What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/camera
Date: Dec 2014
KernelVersion: 3.20
Description: Camera terminal descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/control/terminal/camera/default
Date: Dec 2014
KernelVersion: 3.20
Description: Default camera terminal descriptors
All attributes read only:
bmControls - bitmap specifying which controls are
supported for the video stream
wOcularFocalLength - the value of Locular
wObjectiveFocalLengthMax- the value of Lmin
wObjectiveFocalLengthMin- the value of Lmax
iTerminal - index of string descriptor
bAssocTerminal - id of the output terminal to which
this terminal is connected
wTerminalType - terminal type
bTerminalID - a non-zero id of this terminal
What: /config/usb-gadget/gadget/functions/uvc.name/control/processing
Date: Dec 2014
KernelVersion: 3.20
Description: Processing unit descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/control/processing/default
Date: Dec 2014
KernelVersion: 3.20
Description: Default processing unit descriptors
All attributes read only:
iProcessing - index of string descriptor
bmControls - bitmap specifying which controls are
supported for the video stream
wMaxMultiplier - maximum digital magnification x100
bSourceID - id of the terminal to which this unit is
connected
bUnitID - a non-zero id of this unit
What: /config/usb-gadget/gadget/functions/uvc.name/control/header
Date: Dec 2014
KernelVersion: 3.20
Description: Control header descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/control/header/name
Date: Dec 2014
KernelVersion: 3.20
Description: Specific control header descriptors
dwClockFrequency
bcdUVC
What: /config/usb-gadget/gadget/functions/uvc.name/streaming
Date: Dec 2014
KernelVersion: 3.20
Description: Streaming descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class
Date: Dec 2014
KernelVersion: 3.20
Description: Streaming class descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/ss
Date: Dec 2014
KernelVersion: 3.20
Description: Super speed streaming class descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/hs
Date: Dec 2014
KernelVersion: 3.20
Description: High speed streaming class descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class/fs
Date: Dec 2014
KernelVersion: 3.20
Description: Full speed streaming class descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/color_matching
Date: Dec 2014
KernelVersion: 3.20
Description: Color matching descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/color_matching/default
Date: Dec 2014
KernelVersion: 3.20
Description: Default color matching descriptors
All attributes read only:
bMatrixCoefficients - matrix used to compute luma and
chroma values from the color primaries
bTransferCharacteristics- optoelectronic transfer
characteristic of the source picutre,
also called the gamma function
bColorPrimaries - color primaries and the reference
white
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg
Date: Dec 2014
KernelVersion: 3.20
Description: MJPEG format descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg/name
Date: Dec 2014
KernelVersion: 3.20
Description: Specific MJPEG format descriptors
All attributes read only,
except bmaControls and bDefaultFrameIndex:
bmaControls - this format's data for bmaControls in
the streaming header
bmInterfaceFlags - specifies interlace information,
read-only
bAspectRatioY - the X dimension of the picture aspect
ratio, read-only
bAspectRatioX - the Y dimension of the picture aspect
ratio, read-only
bmFlags - characteristics of this format,
read-only
bDefaultFrameIndex - optimum frame index for this stream
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/mjpeg/name/name
Date: Dec 2014
KernelVersion: 3.20
Description: Specific MJPEG frame descriptors
dwFrameInterval - indicates how frame interval can be
programmed; a number of values
separated by newline can be specified
dwDefaultFrameInterval - the frame interval the device would
like to use as default
dwMaxVideoFrameBufferSize- the maximum number of bytes the
compressor will produce for a video
frame or still image
dwMaxBitRate - the maximum bit rate at the shortest
frame interval in bps
dwMinBitRate - the minimum bit rate at the longest
frame interval in bps
wHeight - height of decoded bitmap frame in px
wWidth - width of decoded bitmam frame in px
bmCapabilities - still image support, fixed frame-rate
support
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed
Date: Dec 2014
KernelVersion: 3.20
Description: Uncompressed format descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed/name
Date: Dec 2014
KernelVersion: 3.20
Description: Specific uncompressed format descriptors
bmaControls - this format's data for bmaControls in
the streaming header
bmInterfaceFlags - specifies interlace information,
read-only
bAspectRatioY - the X dimension of the picture aspect
ratio, read-only
bAspectRatioX - the Y dimension of the picture aspect
ratio, read-only
bDefaultFrameIndex - optimum frame index for this stream
bBitsPerPixel - number of bits per pixel used to
specify color in the decoded video
frame
guidFormat - globally unique id used to identify
stream-encoding format
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/uncompressed/name/name
Date: Dec 2014
KernelVersion: 3.20
Description: Specific uncompressed frame descriptors
dwFrameInterval - indicates how frame interval can be
programmed; a number of values
separated by newline can be specified
dwDefaultFrameInterval - the frame interval the device would
like to use as default
dwMaxVideoFrameBufferSize- the maximum number of bytes the
compressor will produce for a video
frame or still image
dwMaxBitRate - the maximum bit rate at the shortest
frame interval in bps
dwMinBitRate - the minimum bit rate at the longest
frame interval in bps
wHeight - height of decoded bitmap frame in px
wWidth - width of decoded bitmam frame in px
bmCapabilities - still image support, fixed frame-rate
support
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/header
Date: Dec 2014
KernelVersion: 3.20
Description: Streaming header descriptors
What: /config/usb-gadget/gadget/functions/uvc.name/streaming/header/name
Date: Dec 2014
KernelVersion: 3.20
Description: Specific streaming header descriptors
All attributes read only:
bTriggerUsage - how the host software will respond to
a hardware trigger interrupt event
bTriggerSupport - flag specifying if hardware
triggering is supported
bStillCaptureMethod - method of still image caputre
supported
bTerminalLink - id of the output terminal to which
the video endpoint of this interface
is connected
bmInfo - capabilities of this video streaming
interface
......@@ -423,6 +423,17 @@ config USB_CONFIGFS_F_HID
For more information, see Documentation/usb/gadget_hid.txt.
config USB_CONFIGFS_F_UVC
boolean "USB Webcam function"
depends on USB_CONFIGFS
depends on VIDEO_DEV
select VIDEOBUF2_VMALLOC
select USB_F_UVC
help
The Webcam function acts as a composite USB Audio and Video Class
device. It provides a userspace API to process UVC control requests
and stream video data to the host.
source "drivers/usb/gadget/legacy/Kconfig"
endchoice
......
......@@ -36,7 +36,7 @@ usb_f_uac1-y := f_uac1.o u_uac1.o
obj-$(CONFIG_USB_F_UAC1) += usb_f_uac1.o
usb_f_uac2-y := f_uac2.o
obj-$(CONFIG_USB_F_UAC2) += usb_f_uac2.o
usb_f_uvc-y := f_uvc.o uvc_queue.o uvc_v4l2.o uvc_video.o
usb_f_uvc-y := f_uvc.o uvc_queue.o uvc_v4l2.o uvc_video.o uvc_configfs.o
obj-$(CONFIG_USB_F_UVC) += usb_f_uvc.o
usb_f_midi-y := f_midi.o
obj-$(CONFIG_USB_F_MIDI) += usb_f_midi.o
......
......@@ -27,10 +27,11 @@
#include <media/v4l2-dev.h>
#include <media/v4l2-event.h>
#include "u_uvc.h"
#include "uvc.h"
#include "uvc_configfs.h"
#include "uvc_v4l2.h"
#include "uvc_video.h"
#include "u_uvc.h"
unsigned int uvc_gadget_trace_param;
......@@ -788,25 +789,104 @@ static void uvc_free_inst(struct usb_function_instance *f)
{
struct f_uvc_opts *opts = fi_to_f_uvc_opts(f);
mutex_destroy(&opts->lock);
kfree(opts);
}
static struct usb_function_instance *uvc_alloc_inst(void)
{
struct f_uvc_opts *opts;
struct uvc_camera_terminal_descriptor *cd;
struct uvc_processing_unit_descriptor *pd;
struct uvc_output_terminal_descriptor *od;
struct uvc_color_matching_descriptor *md;
struct uvc_descriptor_header **ctl_cls;
opts = kzalloc(sizeof(*opts), GFP_KERNEL);
if (!opts)
return ERR_PTR(-ENOMEM);
opts->func_inst.free_func_inst = uvc_free_inst;
mutex_init(&opts->lock);
cd = &opts->uvc_camera_terminal;
cd->bLength = UVC_DT_CAMERA_TERMINAL_SIZE(3);
cd->bDescriptorType = USB_DT_CS_INTERFACE;
cd->bDescriptorSubType = UVC_VC_INPUT_TERMINAL;
cd->bTerminalID = 1;
cd->wTerminalType = cpu_to_le16(0x0201);
cd->bAssocTerminal = 0;
cd->iTerminal = 0;
cd->wObjectiveFocalLengthMin = cpu_to_le16(0);
cd->wObjectiveFocalLengthMax = cpu_to_le16(0);
cd->wOcularFocalLength = cpu_to_le16(0);
cd->bControlSize = 3;
cd->bmControls[0] = 2;
cd->bmControls[1] = 0;
cd->bmControls[2] = 0;
pd = &opts->uvc_processing;
pd->bLength = UVC_DT_PROCESSING_UNIT_SIZE(2);
pd->bDescriptorType = USB_DT_CS_INTERFACE;
pd->bDescriptorSubType = UVC_VC_PROCESSING_UNIT;
pd->bUnitID = 2;
pd->bSourceID = 1;
pd->wMaxMultiplier = cpu_to_le16(16*1024);
pd->bControlSize = 2;
pd->bmControls[0] = 1;
pd->bmControls[1] = 0;
pd->iProcessing = 0;
od = &opts->uvc_output_terminal;
od->bLength = UVC_DT_OUTPUT_TERMINAL_SIZE;
od->bDescriptorType = USB_DT_CS_INTERFACE;
od->bDescriptorSubType = UVC_VC_OUTPUT_TERMINAL;
od->bTerminalID = 3;
od->wTerminalType = cpu_to_le16(0x0101);
od->bAssocTerminal = 0;
od->bSourceID = 2;
od->iTerminal = 0;
md = &opts->uvc_color_matching;
md->bLength = UVC_DT_COLOR_MATCHING_SIZE;
md->bDescriptorType = USB_DT_CS_INTERFACE;
md->bDescriptorSubType = UVC_VS_COLORFORMAT;
md->bColorPrimaries = 1;
md->bTransferCharacteristics = 1;
md->bMatrixCoefficients = 4;
/* Prepare fs control class descriptors for configfs-based gadgets */
ctl_cls = opts->uvc_fs_control_cls;
ctl_cls[0] = NULL; /* assigned elsewhere by configfs */
ctl_cls[1] = (struct uvc_descriptor_header *)cd;
ctl_cls[2] = (struct uvc_descriptor_header *)pd;
ctl_cls[3] = (struct uvc_descriptor_header *)od;
ctl_cls[4] = NULL; /* NULL-terminate */
opts->fs_control =
(const struct uvc_descriptor_header * const *)ctl_cls;
/* Prepare hs control class descriptors for configfs-based gadgets */
ctl_cls = opts->uvc_ss_control_cls;
ctl_cls[0] = NULL; /* assigned elsewhere by configfs */
ctl_cls[1] = (struct uvc_descriptor_header *)cd;
ctl_cls[2] = (struct uvc_descriptor_header *)pd;
ctl_cls[3] = (struct uvc_descriptor_header *)od;
ctl_cls[4] = NULL; /* NULL-terminate */
opts->ss_control =
(const struct uvc_descriptor_header * const *)ctl_cls;
opts->streaming_interval = 1;
opts->streaming_maxpacket = 1024;
uvcg_attach_configfs(opts);
return &opts->func_inst;
}
static void uvc_free(struct usb_function *f)
{
struct uvc_device *uvc = to_uvc(f);
struct f_uvc_opts *opts = container_of(f->fi, struct f_uvc_opts,
func_inst);
--opts->refcnt;
kfree(uvc);
}
......@@ -832,6 +912,7 @@ static struct usb_function *uvc_alloc(struct usb_function_instance *fi)
{
struct uvc_device *uvc;
struct f_uvc_opts *opts;
struct uvc_descriptor_header **strm_cls;
uvc = kzalloc(sizeof(*uvc), GFP_KERNEL);
if (uvc == NULL)
......@@ -840,11 +921,30 @@ static struct usb_function *uvc_alloc(struct usb_function_instance *fi)
uvc->state = UVC_STATE_DISCONNECTED;
opts = fi_to_f_uvc_opts(fi);
mutex_lock(&opts->lock);
if (opts->uvc_fs_streaming_cls) {
strm_cls = opts->uvc_fs_streaming_cls;
opts->fs_streaming =
(const struct uvc_descriptor_header * const *)strm_cls;
}
if (opts->uvc_hs_streaming_cls) {
strm_cls = opts->uvc_hs_streaming_cls;
opts->hs_streaming =
(const struct uvc_descriptor_header * const *)strm_cls;
}
if (opts->uvc_ss_streaming_cls) {
strm_cls = opts->uvc_ss_streaming_cls;
opts->ss_streaming =
(const struct uvc_descriptor_header * const *)strm_cls;
}
uvc->desc.fs_control = opts->fs_control;
uvc->desc.ss_control = opts->ss_control;
uvc->desc.fs_streaming = opts->fs_streaming;
uvc->desc.hs_streaming = opts->hs_streaming;
uvc->desc.ss_streaming = opts->ss_streaming;
++opts->refcnt;
mutex_unlock(&opts->lock);
/* Register the function. */
uvc->func.name = "uvc";
......
......@@ -17,6 +17,7 @@
#define U_UVC_H
#include <linux/usb/composite.h>
#include <linux/usb/video.h>
#define fi_to_f_uvc_opts(f) container_of(f, struct f_uvc_opts, func_inst)
......@@ -26,11 +27,60 @@ struct f_uvc_opts {
unsigned int streaming_interval;
unsigned int streaming_maxpacket;
unsigned int streaming_maxburst;
/*
* Control descriptors array pointers for full-/high-speed and
* super-speed. They point by default to the uvc_fs_control_cls and
* uvc_ss_control_cls arrays respectively. Legacy gadgets must
* override them in their gadget bind callback.
*/
const struct uvc_descriptor_header * const *fs_control;
const struct uvc_descriptor_header * const *ss_control;
/*
* Streaming descriptors array pointers for full-speed, high-speed and
* super-speed. They will point to the uvc_[fhs]s_streaming_cls arrays
* for configfs-based gadgets. Legacy gadgets must initialize them in
* their gadget bind callback.
*/
const struct uvc_descriptor_header * const *fs_streaming;
const struct uvc_descriptor_header * const *hs_streaming;
const struct uvc_descriptor_header * const *ss_streaming;
/* Default control descriptors for configfs-based gadgets. */
struct uvc_camera_terminal_descriptor uvc_camera_terminal;
struct uvc_processing_unit_descriptor uvc_processing;
struct uvc_output_terminal_descriptor uvc_output_terminal;
struct uvc_color_matching_descriptor uvc_color_matching;
/*
* Control descriptors pointers arrays for full-/high-speed and
* super-speed. The first element is a configurable control header
* descriptor, the other elements point to the fixed default control
* descriptors. Used by configfs only, must not be touched by legacy
* gadgets.
*/
struct uvc_descriptor_header *uvc_fs_control_cls[5];
struct uvc_descriptor_header *uvc_ss_control_cls[5];
/*
* Streaming descriptors for full-speed, high-speed and super-speed.
* Used by configfs only, must not be touched by legacy gadgets. The
* arrays are allocated at runtime as the number of descriptors isn't
* known in advance.
*/
struct uvc_descriptor_header **uvc_fs_streaming_cls;
struct uvc_descriptor_header **uvc_hs_streaming_cls;
struct uvc_descriptor_header **uvc_ss_streaming_cls;
/*
* Read/write access to configfs attributes is handled by configfs.
*
* This lock protects the descriptors from concurrent access by
* read/write and symlink creation/removal.
*/
struct mutex lock;
int refcnt;
};
void uvc_set_trace_param(unsigned int trace);
......
/*
* uvc_configfs.c
*
* Configfs support for the uvc function.
*
* Copyright (c) 2014 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include "u_uvc.h"
#include "uvc_configfs.h"
#define UVCG_STREAMING_CONTROL_SIZE 1
#define CONFIGFS_ATTR_OPS_RO(_item) \
static ssize_t _item##_attr_show(struct config_item *item, \
struct configfs_attribute *attr, \
char *page) \
{ \
struct _item *_item = to_##_item(item); \
struct _item##_attribute *_item##_attr = \
container_of(attr, struct _item##_attribute, attr); \
ssize_t ret = 0; \
\
if (_item##_attr->show) \
ret = _item##_attr->show(_item, page); \
return ret; \
}
static inline struct f_uvc_opts *to_f_uvc_opts(struct config_item *item);
/* control/header/<NAME> */
DECLARE_UVC_HEADER_DESCRIPTOR(1);
struct uvcg_control_header {
struct config_item item;
struct UVC_HEADER_DESCRIPTOR(1) desc;
unsigned linked;
};
struct uvcg_control_header *to_uvcg_control_header(struct config_item *item)
{
return container_of(item, struct uvcg_control_header, item);
}
CONFIGFS_ATTR_STRUCT(uvcg_control_header);
CONFIGFS_ATTR_OPS(uvcg_control_header);
static struct configfs_item_operations uvcg_control_header_item_ops = {
.show_attribute = uvcg_control_header_attr_show,
.store_attribute = uvcg_control_header_attr_store,
};
#define UVCG_CTRL_HDR_ATTR(cname, aname, conv, str2u, uxx, vnoc, limit) \
static ssize_t uvcg_control_header_##cname##_show( \
struct uvcg_control_header *ch, char *page) \
{ \
struct f_uvc_opts *opts; \
struct config_item *opts_item; \
struct mutex *su_mutex = &ch->item.ci_group->cg_subsys->su_mutex;\
int result; \
\
mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
\
opts_item = ch->item.ci_parent->ci_parent->ci_parent; \
opts = to_f_uvc_opts(opts_item); \
\
mutex_lock(&opts->lock); \
result = sprintf(page, "%d\n", conv(ch->desc.aname)); \
mutex_unlock(&opts->lock); \
\
mutex_unlock(su_mutex); \
return result; \
} \
\
static ssize_t \
uvcg_control_header_##cname##_store(struct uvcg_control_header *ch, \
const char *page, size_t len) \
{ \
struct f_uvc_opts *opts; \
struct config_item *opts_item; \
struct mutex *su_mutex = &ch->item.ci_group->cg_subsys->su_mutex;\
int ret; \
uxx num; \
\
mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
\
opts_item = ch->item.ci_parent->ci_parent->ci_parent; \
opts = to_f_uvc_opts(opts_item); \
\
mutex_lock(&opts->lock); \
if (ch->linked || opts->refcnt) { \
ret = -EBUSY; \
goto end; \
} \
\
ret = str2u(page, 0, &num); \
if (ret) \
goto end; \
\
if (num > limit) { \
ret = -EINVAL; \
goto end; \
} \
ch->desc.aname = vnoc(num); \
ret = len; \
end: \
mutex_unlock(&opts->lock); \
mutex_unlock(su_mutex); \
return ret; \
} \
\
static struct uvcg_control_header_attribute \
uvcg_control_header_##cname = \
__CONFIGFS_ATTR(aname, S_IRUGO | S_IWUSR, \
uvcg_control_header_##cname##_show, \
uvcg_control_header_##cname##_store)
UVCG_CTRL_HDR_ATTR(bcd_uvc, bcdUVC, le16_to_cpu, kstrtou16, u16, cpu_to_le16,
0xffff);
UVCG_CTRL_HDR_ATTR(dw_clock_frequency, dwClockFrequency, le32_to_cpu, kstrtou32,
u32, cpu_to_le32, 0x7fffffff);
#undef UVCG_CTRL_HDR_ATTR
static struct configfs_attribute *uvcg_control_header_attrs[] = {
&uvcg_control_header_bcd_uvc.attr,
&uvcg_control_header_dw_clock_frequency.attr,
NULL,
};
struct config_item_type uvcg_control_header_type = {
.ct_item_ops = &uvcg_control_header_item_ops,
.ct_attrs = uvcg_control_header_attrs,
.ct_owner = THIS_MODULE,
};
static struct config_item *uvcg_control_header_make(struct config_group *group,
const char *name)
{
struct uvcg_control_header *h;
h = kzalloc(sizeof(*h), GFP_KERNEL);
if (!h)
return ERR_CAST(h);
h->desc.bLength = UVC_DT_HEADER_SIZE(1);
h->desc.bDescriptorType = USB_DT_CS_INTERFACE;
h->desc.bDescriptorSubType = UVC_VC_HEADER;
h->desc.bcdUVC = cpu_to_le16(0x0100);
h->desc.dwClockFrequency = cpu_to_le32(48000000);
config_item_init_type_name(&h->item, name, &uvcg_control_header_type);
return &h->item;
}
void uvcg_control_header_drop(struct config_group *group,
struct config_item *item)
{
struct uvcg_control_header *h = to_uvcg_control_header(item);
kfree(h);
}
/* control/header */
static struct uvcg_control_header_grp {
struct config_group group;
} uvcg_control_header_grp;
static struct configfs_group_operations uvcg_control_header_grp_ops = {
.make_item = uvcg_control_header_make,
.drop_item = uvcg_control_header_drop,
};
static struct config_item_type uvcg_control_header_grp_type = {
.ct_group_ops = &uvcg_control_header_grp_ops,
.ct_owner = THIS_MODULE,
};
/* control/processing/default */
static struct uvcg_default_processing {
struct config_group group;
} uvcg_default_processing;
static inline struct uvcg_default_processing
*to_uvcg_default_processing(struct config_item *item)
{
return container_of(to_config_group(item),
struct uvcg_default_processing, group);
}
CONFIGFS_ATTR_STRUCT(uvcg_default_processing);
CONFIGFS_ATTR_OPS_RO(uvcg_default_processing);
static struct configfs_item_operations uvcg_default_processing_item_ops = {
.show_attribute = uvcg_default_processing_attr_show,
};
#define UVCG_DEFAULT_PROCESSING_ATTR(cname, aname, conv) \
static ssize_t uvcg_default_processing_##cname##_show( \
struct uvcg_default_processing *dp, char *page) \
{ \
struct f_uvc_opts *opts; \
struct config_item *opts_item; \
struct mutex *su_mutex = &dp->group.cg_subsys->su_mutex; \
struct uvc_processing_unit_descriptor *pd; \
int result; \
\
mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
\
opts_item = dp->group.cg_item.ci_parent->ci_parent->ci_parent; \
opts = to_f_uvc_opts(opts_item); \
pd = &opts->uvc_processing; \
\
mutex_lock(&opts->lock); \
result = sprintf(page, "%d\n", conv(pd->aname)); \
mutex_unlock(&opts->lock); \
\
mutex_unlock(su_mutex); \
return result; \
} \
\
static struct uvcg_default_processing_attribute \
uvcg_default_processing_##cname = \
__CONFIGFS_ATTR_RO(aname, uvcg_default_processing_##cname##_show)
#define identity_conv(x) (x)
UVCG_DEFAULT_PROCESSING_ATTR(b_unit_id, bUnitID, identity_conv);
UVCG_DEFAULT_PROCESSING_ATTR(b_source_id, bSourceID, identity_conv);
UVCG_DEFAULT_PROCESSING_ATTR(w_max_multiplier, wMaxMultiplier, le16_to_cpu);
UVCG_DEFAULT_PROCESSING_ATTR(i_processing, iProcessing, identity_conv);
#undef identity_conv
#undef UVCG_DEFAULT_PROCESSING_ATTR
static ssize_t uvcg_default_processing_bm_controls_show(
struct uvcg_default_processing *dp, char *page)
{
struct f_uvc_opts *opts;
struct config_item *opts_item;
struct mutex *su_mutex = &dp->group.cg_subsys->su_mutex;
struct uvc_processing_unit_descriptor *pd;
int result, i;
char *pg = page;
mutex_lock(su_mutex); /* for navigating configfs hierarchy */
opts_item = dp->group.cg_item.ci_parent->ci_parent->ci_parent;
opts = to_f_uvc_opts(opts_item);
pd = &opts->uvc_processing;
mutex_lock(&opts->lock);
for (result = 0, i = 0; i < pd->bControlSize; ++i) {
result += sprintf(pg, "%d\n", pd->bmControls[i]);
pg = page + result;
}
mutex_unlock(&opts->lock);
mutex_unlock(su_mutex);
return result;
}
static struct uvcg_default_processing_attribute
uvcg_default_processing_bm_controls =
__CONFIGFS_ATTR_RO(bmControls,
uvcg_default_processing_bm_controls_show);
static struct configfs_attribute *uvcg_default_processing_attrs[] = {
&uvcg_default_processing_b_unit_id.attr,
&uvcg_default_processing_b_source_id.attr,
&uvcg_default_processing_w_max_multiplier.attr,
&uvcg_default_processing_bm_controls.attr,
&uvcg_default_processing_i_processing.attr,
NULL,
};
static struct config_item_type uvcg_default_processing_type = {
.ct_item_ops = &uvcg_default_processing_item_ops,
.ct_attrs = uvcg_default_processing_attrs,
.ct_owner = THIS_MODULE,
};
/* struct uvcg_processing {}; */
static struct config_group *uvcg_processing_default_groups[] = {
&uvcg_default_processing.group,
NULL,
};
/* control/processing */
static struct uvcg_processing_grp {
struct config_group group;
} uvcg_processing_grp;
static struct config_item_type uvcg_processing_grp_type = {
.ct_owner = THIS_MODULE,
};
/* control/terminal/camera/default */
static struct uvcg_default_camera {
struct config_group group;
} uvcg_default_camera;
static inline struct uvcg_default_camera
*to_uvcg_default_camera(struct config_item *item)
{
return container_of(to_config_group(item),
struct uvcg_default_camera, group);
}
CONFIGFS_ATTR_STRUCT(uvcg_default_camera);
CONFIGFS_ATTR_OPS_RO(uvcg_default_camera);
static struct configfs_item_operations uvcg_default_camera_item_ops = {
.show_attribute = uvcg_default_camera_attr_show,
};
#define UVCG_DEFAULT_CAMERA_ATTR(cname, aname, conv) \
static ssize_t uvcg_default_camera_##cname##_show( \
struct uvcg_default_camera *dc, char *page) \
{ \
struct f_uvc_opts *opts; \
struct config_item *opts_item; \
struct mutex *su_mutex = &dc->group.cg_subsys->su_mutex; \
struct uvc_camera_terminal_descriptor *cd; \
int result; \
\
mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
\
opts_item = dc->group.cg_item.ci_parent->ci_parent->ci_parent-> \
ci_parent; \
opts = to_f_uvc_opts(opts_item); \
cd = &opts->uvc_camera_terminal; \
\
mutex_lock(&opts->lock); \
result = sprintf(page, "%d\n", conv(cd->aname)); \
mutex_unlock(&opts->lock); \
\
mutex_unlock(su_mutex); \
\
return result; \
} \
\
static struct uvcg_default_camera_attribute \
uvcg_default_camera_##cname = \
__CONFIGFS_ATTR_RO(aname, uvcg_default_camera_##cname##_show)
#define identity_conv(x) (x)
UVCG_DEFAULT_CAMERA_ATTR(b_terminal_id, bTerminalID, identity_conv);
UVCG_DEFAULT_CAMERA_ATTR(w_terminal_type, wTerminalType, le16_to_cpu);
UVCG_DEFAULT_CAMERA_ATTR(b_assoc_terminal, bAssocTerminal, identity_conv);
UVCG_DEFAULT_CAMERA_ATTR(i_terminal, iTerminal, identity_conv);
UVCG_DEFAULT_CAMERA_ATTR(w_objective_focal_length_min, wObjectiveFocalLengthMin,
le16_to_cpu);
UVCG_DEFAULT_CAMERA_ATTR(w_objective_focal_length_max, wObjectiveFocalLengthMax,
le16_to_cpu);
UVCG_DEFAULT_CAMERA_ATTR(w_ocular_focal_length, wOcularFocalLength,
le16_to_cpu);
#undef identity_conv
#undef UVCG_DEFAULT_CAMERA_ATTR
static ssize_t uvcg_default_camera_bm_controls_show(
struct uvcg_default_camera *dc, char *page)
{
struct f_uvc_opts *opts;
struct config_item *opts_item;
struct mutex *su_mutex = &dc->group.cg_subsys->su_mutex;
struct uvc_camera_terminal_descriptor *cd;
int result, i;
char *pg = page;
mutex_lock(su_mutex); /* for navigating configfs hierarchy */
opts_item = dc->group.cg_item.ci_parent->ci_parent->ci_parent->
ci_parent;
opts = to_f_uvc_opts(opts_item);
cd = &opts->uvc_camera_terminal;
mutex_lock(&opts->lock);
for (result = 0, i = 0; i < cd->bControlSize; ++i) {
result += sprintf(pg, "%d\n", cd->bmControls[i]);
pg = page + result;
}
mutex_unlock(&opts->lock);
mutex_unlock(su_mutex);
return result;
}
static struct uvcg_default_camera_attribute
uvcg_default_camera_bm_controls =
__CONFIGFS_ATTR_RO(bmControls, uvcg_default_camera_bm_controls_show);
static struct configfs_attribute *uvcg_default_camera_attrs[] = {
&uvcg_default_camera_b_terminal_id.attr,
&uvcg_default_camera_w_terminal_type.attr,
&uvcg_default_camera_b_assoc_terminal.attr,
&uvcg_default_camera_i_terminal.attr,
&uvcg_default_camera_w_objective_focal_length_min.attr,
&uvcg_default_camera_w_objective_focal_length_max.attr,
&uvcg_default_camera_w_ocular_focal_length.attr,
&uvcg_default_camera_bm_controls.attr,
NULL,
};
static struct config_item_type uvcg_default_camera_type = {
.ct_item_ops = &uvcg_default_camera_item_ops,
.ct_attrs = uvcg_default_camera_attrs,
.ct_owner = THIS_MODULE,
};
/* struct uvcg_camera {}; */
static struct config_group *uvcg_camera_default_groups[] = {
&uvcg_default_camera.group,
NULL,
};
/* control/terminal/camera */
static struct uvcg_camera_grp {
struct config_group group;
} uvcg_camera_grp;
static struct config_item_type uvcg_camera_grp_type = {
.ct_owner = THIS_MODULE,
};
/* control/terminal/output/default */
static struct uvcg_default_output {
struct config_group group;
} uvcg_default_output;
static inline struct uvcg_default_output
*to_uvcg_default_output(struct config_item *item)
{
return container_of(to_config_group(item),
struct uvcg_default_output, group);
}
CONFIGFS_ATTR_STRUCT(uvcg_default_output);
CONFIGFS_ATTR_OPS_RO(uvcg_default_output);
static struct configfs_item_operations uvcg_default_output_item_ops = {
.show_attribute = uvcg_default_output_attr_show,
};
#define UVCG_DEFAULT_OUTPUT_ATTR(cname, aname, conv) \
static ssize_t uvcg_default_output_##cname##_show( \
struct uvcg_default_output *dout, char *page) \
{ \
struct f_uvc_opts *opts; \
struct config_item *opts_item; \
struct mutex *su_mutex = &dout->group.cg_subsys->su_mutex; \
struct uvc_output_terminal_descriptor *cd; \
int result; \
\
mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
\
opts_item = dout->group.cg_item.ci_parent->ci_parent-> \
ci_parent->ci_parent; \
opts = to_f_uvc_opts(opts_item); \
cd = &opts->uvc_output_terminal; \
\
mutex_lock(&opts->lock); \
result = sprintf(page, "%d\n", conv(cd->aname)); \
mutex_unlock(&opts->lock); \
\
mutex_unlock(su_mutex); \
\
return result; \
} \
\
static struct uvcg_default_output_attribute \
uvcg_default_output_##cname = \
__CONFIGFS_ATTR_RO(aname, uvcg_default_output_##cname##_show)
#define identity_conv(x) (x)
UVCG_DEFAULT_OUTPUT_ATTR(b_terminal_id, bTerminalID, identity_conv);
UVCG_DEFAULT_OUTPUT_ATTR(w_terminal_type, wTerminalType, le16_to_cpu);
UVCG_DEFAULT_OUTPUT_ATTR(b_assoc_terminal, bAssocTerminal, identity_conv);
UVCG_DEFAULT_OUTPUT_ATTR(b_source_id, bSourceID, identity_conv);
UVCG_DEFAULT_OUTPUT_ATTR(i_terminal, iTerminal, identity_conv);
#undef identity_conv
#undef UVCG_DEFAULT_OUTPUT_ATTR
static struct configfs_attribute *uvcg_default_output_attrs[] = {
&uvcg_default_output_b_terminal_id.attr,
&uvcg_default_output_w_terminal_type.attr,
&uvcg_default_output_b_assoc_terminal.attr,
&uvcg_default_output_b_source_id.attr,
&uvcg_default_output_i_terminal.attr,
NULL,
};
static struct config_item_type uvcg_default_output_type = {
.ct_item_ops = &uvcg_default_output_item_ops,
.ct_attrs = uvcg_default_output_attrs,
.ct_owner = THIS_MODULE,
};
/* struct uvcg_output {}; */
static struct config_group *uvcg_output_default_groups[] = {
&uvcg_default_output.group,
NULL,
};
/* control/terminal/output */
static struct uvcg_output_grp {
struct config_group group;
} uvcg_output_grp;
static struct config_item_type uvcg_output_grp_type = {
.ct_owner = THIS_MODULE,
};
static struct config_group *uvcg_terminal_default_groups[] = {
&uvcg_camera_grp.group,
&uvcg_output_grp.group,
NULL,
};
/* control/terminal */
static struct uvcg_terminal_grp {
struct config_group group;
} uvcg_terminal_grp;
static struct config_item_type uvcg_terminal_grp_type = {
.ct_owner = THIS_MODULE,
};
/* control/class/{fs} */
static struct uvcg_control_class {
struct config_group group;
} uvcg_control_class_fs, uvcg_control_class_ss;
static inline struct uvc_descriptor_header
**uvcg_get_ctl_class_arr(struct config_item *i, struct f_uvc_opts *o)
{
struct uvcg_control_class *cl = container_of(to_config_group(i),
struct uvcg_control_class, group);
if (cl == &uvcg_control_class_fs)
return o->uvc_fs_control_cls;
if (cl == &uvcg_control_class_ss)
return o->uvc_ss_control_cls;
return NULL;
}
static int uvcg_control_class_allow_link(struct config_item *src,
struct config_item *target)
{
struct config_item *control, *header;
struct f_uvc_opts *opts;
struct mutex *su_mutex = &src->ci_group->cg_subsys->su_mutex;
struct uvc_descriptor_header **class_array;
struct uvcg_control_header *target_hdr;
int ret = -EINVAL;
mutex_lock(su_mutex); /* for navigating configfs hierarchy */
control = src->ci_parent->ci_parent;
header = config_group_find_item(to_config_group(control), "header");
if (!header || target->ci_parent != header)
goto out;
opts = to_f_uvc_opts(control->ci_parent);
mutex_lock(&opts->lock);
class_array = uvcg_get_ctl_class_arr(src, opts);
if (!class_array)
goto unlock;
if (opts->refcnt || class_array[0]) {
ret = -EBUSY;
goto unlock;
}
target_hdr = to_uvcg_control_header(target);
++target_hdr->linked;
class_array[0] = (struct uvc_descriptor_header *)&target_hdr->desc;
ret = 0;
unlock:
mutex_unlock(&opts->lock);
out:
mutex_unlock(su_mutex);
return ret;
}
static int uvcg_control_class_drop_link(struct config_item *src,
struct config_item *target)
{
struct config_item *control, *header;
struct f_uvc_opts *opts;
struct mutex *su_mutex = &src->ci_group->cg_subsys->su_mutex;
struct uvc_descriptor_header **class_array;
struct uvcg_control_header *target_hdr;
int ret = -EINVAL;
mutex_lock(su_mutex); /* for navigating configfs hierarchy */
control = src->ci_parent->ci_parent;
header = config_group_find_item(to_config_group(control), "header");
if (!header || target->ci_parent != header)
goto out;
opts = to_f_uvc_opts(control->ci_parent);
mutex_lock(&opts->lock);
class_array = uvcg_get_ctl_class_arr(src, opts);
if (!class_array)
goto unlock;
if (opts->refcnt) {
ret = -EBUSY;
goto unlock;
}
target_hdr = to_uvcg_control_header(target);
--target_hdr->linked;
class_array[0] = NULL;
ret = 0;
unlock:
mutex_unlock(&opts->lock);
out:
mutex_unlock(su_mutex);
return ret;
}
static struct configfs_item_operations uvcg_control_class_item_ops = {
.allow_link = uvcg_control_class_allow_link,
.drop_link = uvcg_control_class_drop_link,
};
static struct config_item_type uvcg_control_class_type = {
.ct_item_ops = &uvcg_control_class_item_ops,
.ct_owner = THIS_MODULE,
};
static struct config_group *uvcg_control_class_default_groups[] = {
&uvcg_control_class_fs.group,
&uvcg_control_class_ss.group,
NULL,
};
/* control/class */
static struct uvcg_control_class_grp {
struct config_group group;
} uvcg_control_class_grp;
static struct config_item_type uvcg_control_class_grp_type = {
.ct_owner = THIS_MODULE,
};
static struct config_group *uvcg_control_default_groups[] = {
&uvcg_control_header_grp.group,
&uvcg_processing_grp.group,
&uvcg_terminal_grp.group,
&uvcg_control_class_grp.group,
NULL,
};
/* control */
static struct uvcg_control_grp {
struct config_group group;
} uvcg_control_grp;
static struct config_item_type uvcg_control_grp_type = {
.ct_owner = THIS_MODULE,
};
/* streaming/uncompressed */
static struct uvcg_uncompressed_grp {
struct config_group group;
} uvcg_uncompressed_grp;
/* streaming/mjpeg */
static struct uvcg_mjpeg_grp {
struct config_group group;
} uvcg_mjpeg_grp;
static struct config_item *fmt_parent[] = {
&uvcg_uncompressed_grp.group.cg_item,
&uvcg_mjpeg_grp.group.cg_item,
};
enum uvcg_format_type {
UVCG_UNCOMPRESSED = 0,
UVCG_MJPEG,
};
struct uvcg_format {
struct config_group group;
enum uvcg_format_type type;
unsigned linked;
unsigned num_frames;
__u8 bmaControls[UVCG_STREAMING_CONTROL_SIZE];
};
struct uvcg_format *to_uvcg_format(struct config_item *item)
{
return container_of(to_config_group(item), struct uvcg_format, group);
}
static ssize_t uvcg_format_bma_controls_show(struct uvcg_format *f, char *page)
{
struct f_uvc_opts *opts;
struct config_item *opts_item;
struct mutex *su_mutex = &f->group.cg_subsys->su_mutex;
int result, i;
char *pg = page;
mutex_lock(su_mutex); /* for navigating configfs hierarchy */
opts_item = f->group.cg_item.ci_parent->ci_parent->ci_parent;
opts = to_f_uvc_opts(opts_item);
mutex_lock(&opts->lock);
result = sprintf(pg, "0x");
pg += result;
for (i = 0; i < UVCG_STREAMING_CONTROL_SIZE; ++i) {
result += sprintf(pg, "%x\n", f->bmaControls[i]);
pg = page + result;
}
mutex_unlock(&opts->lock);
mutex_unlock(su_mutex);
return result;
}
static ssize_t uvcg_format_bma_controls_store(struct uvcg_format *ch,
const char *page, size_t len)
{
struct f_uvc_opts *opts;
struct config_item *opts_item;
struct mutex *su_mutex = &ch->group.cg_subsys->su_mutex;
int ret = -EINVAL;
mutex_lock(su_mutex); /* for navigating configfs hierarchy */
opts_item = ch->group.cg_item.ci_parent->ci_parent->ci_parent;
opts = to_f_uvc_opts(opts_item);
mutex_lock(&opts->lock);
if (ch->linked || opts->refcnt) {
ret = -EBUSY;
goto end;
}
if (len < 4 || *page != '0' ||
(*(page + 1) != 'x' && *(page + 1) != 'X'))
goto end;
ret = hex2bin(ch->bmaControls, page + 2, 1);
if (ret < 0)
goto end;
ret = len;
end:
mutex_unlock(&opts->lock);
mutex_unlock(su_mutex);
return ret;
}
struct uvcg_format_ptr {
struct uvcg_format *fmt;
struct list_head entry;
};
/* streaming/header/<NAME> */
struct uvcg_streaming_header {
struct config_item item;
struct uvc_input_header_descriptor desc;
unsigned linked;
struct list_head formats;
unsigned num_fmt;
};
struct uvcg_streaming_header *to_uvcg_streaming_header(struct config_item *item)
{
return container_of(item, struct uvcg_streaming_header, item);
}
CONFIGFS_ATTR_STRUCT(uvcg_streaming_header);
CONFIGFS_ATTR_OPS(uvcg_streaming_header);
static int uvcg_streaming_header_allow_link(struct config_item *src,
struct config_item *target)
{
struct mutex *su_mutex = &src->ci_group->cg_subsys->su_mutex;
struct config_item *opts_item;
struct f_uvc_opts *opts;
struct uvcg_streaming_header *src_hdr;
struct uvcg_format *target_fmt = NULL;
struct uvcg_format_ptr *format_ptr;
int i, ret = -EINVAL;
src_hdr = to_uvcg_streaming_header(src);
mutex_lock(su_mutex); /* for navigating configfs hierarchy */
opts_item = src->ci_parent->ci_parent->ci_parent;
opts = to_f_uvc_opts(opts_item);
mutex_lock(&opts->lock);
if (src_hdr->linked) {
ret = -EBUSY;
goto out;
}
for (i = 0; i < ARRAY_SIZE(fmt_parent); ++i)
if (target->ci_parent == fmt_parent[i])
break;
if (i == ARRAY_SIZE(fmt_parent))
goto out;
target_fmt = container_of(to_config_group(target), struct uvcg_format,
group);
if (!target_fmt)
goto out;
format_ptr = kzalloc(sizeof(*format_ptr), GFP_KERNEL);
if (!format_ptr) {
ret = PTR_ERR(format_ptr);
goto out;
}
ret = 0;
format_ptr->fmt = target_fmt;
list_add_tail(&format_ptr->entry, &src_hdr->formats);
++src_hdr->num_fmt;
out:
mutex_unlock(&opts->lock);
mutex_unlock(su_mutex);
return ret;
}
static int uvcg_streaming_header_drop_link(struct config_item *src,
struct config_item *target)
{
struct mutex *su_mutex = &src->ci_group->cg_subsys->su_mutex;
struct config_item *opts_item;
struct f_uvc_opts *opts;
struct uvcg_streaming_header *src_hdr;
struct uvcg_format *target_fmt = NULL;
struct uvcg_format_ptr *format_ptr, *tmp;
int ret = -EINVAL;
src_hdr = to_uvcg_streaming_header(src);
mutex_lock(su_mutex); /* for navigating configfs hierarchy */
opts_item = src->ci_parent->ci_parent->ci_parent;
opts = to_f_uvc_opts(opts_item);
mutex_lock(&opts->lock);
target_fmt = container_of(to_config_group(target), struct uvcg_format,
group);
if (!target_fmt)
goto out;
list_for_each_entry_safe(format_ptr, tmp, &src_hdr->formats, entry)
if (format_ptr->fmt == target_fmt) {
list_del(&format_ptr->entry);
kfree(format_ptr);
--src_hdr->num_fmt;
break;
}
out:
mutex_unlock(&opts->lock);
mutex_unlock(su_mutex);
return ret;
}
static struct configfs_item_operations uvcg_streaming_header_item_ops = {
.show_attribute = uvcg_streaming_header_attr_show,
.store_attribute = uvcg_streaming_header_attr_store,
.allow_link = uvcg_streaming_header_allow_link,
.drop_link = uvcg_streaming_header_drop_link,
};
#define UVCG_STREAMING_HEADER_ATTR(cname, aname, conv) \
static ssize_t uvcg_streaming_header_##cname##_show( \
struct uvcg_streaming_header *sh, char *page) \
{ \
struct f_uvc_opts *opts; \
struct config_item *opts_item; \
struct mutex *su_mutex = &sh->item.ci_group->cg_subsys->su_mutex;\
int result; \
\
mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
\
opts_item = sh->item.ci_parent->ci_parent->ci_parent; \
opts = to_f_uvc_opts(opts_item); \
\
mutex_lock(&opts->lock); \
result = sprintf(page, "%d\n", conv(sh->desc.aname)); \
mutex_unlock(&opts->lock); \
\
mutex_unlock(su_mutex); \
return result; \
} \
\
static struct uvcg_streaming_header_attribute \
uvcg_streaming_header_##cname = \
__CONFIGFS_ATTR_RO(aname, uvcg_streaming_header_##cname##_show)
#define identity_conv(x) (x)
UVCG_STREAMING_HEADER_ATTR(bm_info, bmInfo, identity_conv);
UVCG_STREAMING_HEADER_ATTR(b_terminal_link, bTerminalLink, identity_conv);
UVCG_STREAMING_HEADER_ATTR(b_still_capture_method, bStillCaptureMethod,
identity_conv);
UVCG_STREAMING_HEADER_ATTR(b_trigger_support, bTriggerSupport, identity_conv);
UVCG_STREAMING_HEADER_ATTR(b_trigger_usage, bTriggerUsage, identity_conv);
#undef identity_conv
#undef UVCG_STREAMING_HEADER_ATTR
static struct configfs_attribute *uvcg_streaming_header_attrs[] = {
&uvcg_streaming_header_bm_info.attr,
&uvcg_streaming_header_b_terminal_link.attr,
&uvcg_streaming_header_b_still_capture_method.attr,
&uvcg_streaming_header_b_trigger_support.attr,
&uvcg_streaming_header_b_trigger_usage.attr,
NULL,
};
struct config_item_type uvcg_streaming_header_type = {
.ct_item_ops = &uvcg_streaming_header_item_ops,
.ct_attrs = uvcg_streaming_header_attrs,
.ct_owner = THIS_MODULE,
};
static struct config_item
*uvcg_streaming_header_make(struct config_group *group, const char *name)
{
struct uvcg_streaming_header *h;
h = kzalloc(sizeof(*h), GFP_KERNEL);
if (!h)
return ERR_CAST(h);
INIT_LIST_HEAD(&h->formats);
h->desc.bDescriptorType = USB_DT_CS_INTERFACE;
h->desc.bDescriptorSubType = UVC_VS_INPUT_HEADER;
h->desc.bTerminalLink = 3;
h->desc.bControlSize = UVCG_STREAMING_CONTROL_SIZE;
config_item_init_type_name(&h->item, name, &uvcg_streaming_header_type);
return &h->item;
}
void uvcg_streaming_header_drop(struct config_group *group,
struct config_item *item)
{
struct uvcg_streaming_header *h = to_uvcg_streaming_header(item);
kfree(h);
}
/* streaming/header */
static struct uvcg_streaming_header_grp {
struct config_group group;
} uvcg_streaming_header_grp;
static struct configfs_group_operations uvcg_streaming_header_grp_ops = {
.make_item = uvcg_streaming_header_make,
.drop_item = uvcg_streaming_header_drop,
};
static struct config_item_type uvcg_streaming_header_grp_type = {
.ct_group_ops = &uvcg_streaming_header_grp_ops,
.ct_owner = THIS_MODULE,
};
/* streaming/<mode>/<format>/<NAME> */
struct uvcg_frame {
struct {
u8 b_length;
u8 b_descriptor_type;
u8 b_descriptor_subtype;
u8 b_frame_index;
u8 bm_capabilities;
u16 w_width;
u16 w_height;
u32 dw_min_bit_rate;
u32 dw_max_bit_rate;
u32 dw_max_video_frame_buffer_size;
u32 dw_default_frame_interval;
u8 b_frame_interval_type;
} __attribute__((packed)) frame;
u32 *dw_frame_interval;
enum uvcg_format_type fmt_type;
struct config_item item;
};
struct uvcg_frame *to_uvcg_frame(struct config_item *item)
{
return container_of(item, struct uvcg_frame, item);
}
CONFIGFS_ATTR_STRUCT(uvcg_frame);
CONFIGFS_ATTR_OPS(uvcg_frame);
static struct configfs_item_operations uvcg_frame_item_ops = {
.show_attribute = uvcg_frame_attr_show,
.store_attribute = uvcg_frame_attr_store,
};
#define UVCG_FRAME_ATTR(cname, aname, conv, str2u, uxx, vnoc, limit) \
static ssize_t uvcg_frame_##cname##_show(struct uvcg_frame *f, char *page)\
{ \
struct f_uvc_opts *opts; \
struct config_item *opts_item; \
struct mutex *su_mutex = &f->item.ci_group->cg_subsys->su_mutex;\
int result; \
\
mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
\
opts_item = f->item.ci_parent->ci_parent->ci_parent->ci_parent; \
opts = to_f_uvc_opts(opts_item); \
\
mutex_lock(&opts->lock); \
result = sprintf(page, "%d\n", conv(f->frame.cname)); \
mutex_unlock(&opts->lock); \
\
mutex_unlock(su_mutex); \
return result; \
} \
\
static ssize_t uvcg_frame_##cname##_store(struct uvcg_frame *f, \
const char *page, size_t len)\
{ \
struct f_uvc_opts *opts; \
struct config_item *opts_item; \
struct uvcg_format *fmt; \
struct mutex *su_mutex = &f->item.ci_group->cg_subsys->su_mutex;\
int ret; \
uxx num; \
\
mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
\
opts_item = f->item.ci_parent->ci_parent->ci_parent->ci_parent; \
opts = to_f_uvc_opts(opts_item); \
fmt = to_uvcg_format(f->item.ci_parent); \
\
mutex_lock(&opts->lock); \
if (fmt->linked || opts->refcnt) { \
ret = -EBUSY; \
goto end; \
} \
\
ret = str2u(page, 0, &num); \
if (ret) \
goto end; \
\
if (num > limit) { \
ret = -EINVAL; \
goto end; \
} \
f->frame.cname = vnoc(num); \
ret = len; \
end: \
mutex_unlock(&opts->lock); \
mutex_unlock(su_mutex); \
return ret; \
} \
\
static struct uvcg_frame_attribute \
uvcg_frame_##cname = \
__CONFIGFS_ATTR(aname, S_IRUGO | S_IWUSR, \
uvcg_frame_##cname##_show, \
uvcg_frame_##cname##_store)
#define identity_conv(x) (x)
UVCG_FRAME_ATTR(bm_capabilities, bmCapabilities, identity_conv, kstrtou8, u8,
identity_conv, 0xFF);
UVCG_FRAME_ATTR(w_width, wWidth, le16_to_cpu, kstrtou16, u16, cpu_to_le16,
0xFFFF);
UVCG_FRAME_ATTR(w_height, wHeight, le16_to_cpu, kstrtou16, u16, cpu_to_le16,
0xFFFF);
UVCG_FRAME_ATTR(dw_min_bit_rate, dwMinBitRate, le32_to_cpu, kstrtou32, u32,
cpu_to_le32, 0xFFFFFFFF);
UVCG_FRAME_ATTR(dw_max_bit_rate, dwMaxBitRate, le32_to_cpu, kstrtou32, u32,
cpu_to_le32, 0xFFFFFFFF);
UVCG_FRAME_ATTR(dw_max_video_frame_buffer_size, dwMaxVideoFrameBufferSize,
le32_to_cpu, kstrtou32, u32, cpu_to_le32, 0xFFFFFFFF);
UVCG_FRAME_ATTR(dw_default_frame_interval, dwDefaultFrameInterval,
le32_to_cpu, kstrtou32, u32, cpu_to_le32, 0xFFFFFFFF);
#undef identity_conv
#undef UVCG_FRAME_ATTR
static ssize_t uvcg_frame_dw_frame_interval_show(struct uvcg_frame *frm,
char *page)
{
struct f_uvc_opts *opts;
struct config_item *opts_item;
struct mutex *su_mutex = &frm->item.ci_group->cg_subsys->su_mutex;
int result, i;
char *pg = page;
mutex_lock(su_mutex); /* for navigating configfs hierarchy */
opts_item = frm->item.ci_parent->ci_parent->ci_parent->ci_parent;
opts = to_f_uvc_opts(opts_item);
mutex_lock(&opts->lock);
for (result = 0, i = 0; i < frm->frame.b_frame_interval_type; ++i) {
result += sprintf(pg, "%d\n",
le32_to_cpu(frm->dw_frame_interval[i]));
pg = page + result;
}
mutex_unlock(&opts->lock);
mutex_unlock(su_mutex);
return result;
}
static inline int __uvcg_count_frm_intrv(char *buf, void *priv)
{
++*((int *)priv);
return 0;
}
static inline int __uvcg_fill_frm_intrv(char *buf, void *priv)
{
u32 num, **interv;
int ret;
ret = kstrtou32(buf, 0, &num);
if (ret)
return ret;
if (num > 0xFFFFFFFF)
return -EINVAL;
interv = priv;
**interv = cpu_to_le32(num);
++*interv;
return 0;
}
static int __uvcg_iter_frm_intrv(const char *page, size_t len,
int (*fun)(char *, void *), void *priv)
{
/* sign, base 2 representation, newline, terminator */
char buf[1 + sizeof(u32) * 8 + 1 + 1];
const char *pg = page;
int i, ret;
if (!fun)
return -EINVAL;
while (pg - page < len) {
i = 0;
while (i < sizeof(buf) && (pg - page < len) &&
*pg != '\0' && *pg != '\n')
buf[i++] = *pg++;
if (i == sizeof(buf))
return -EINVAL;
while ((pg - page < len) && (*pg == '\0' || *pg == '\n'))
++pg;
buf[i] = '\0';
ret = fun(buf, priv);
if (ret)
return ret;
}
return 0;
}
static ssize_t uvcg_frame_dw_frame_interval_store(struct uvcg_frame *ch,
const char *page, size_t len)
{
struct f_uvc_opts *opts;
struct config_item *opts_item;
struct uvcg_format *fmt;
struct mutex *su_mutex = &ch->item.ci_group->cg_subsys->su_mutex;
int ret = 0, n = 0;
u32 *frm_intrv, *tmp;
mutex_lock(su_mutex); /* for navigating configfs hierarchy */
opts_item = ch->item.ci_parent->ci_parent->ci_parent->ci_parent;
opts = to_f_uvc_opts(opts_item);
fmt = to_uvcg_format(ch->item.ci_parent);
mutex_lock(&opts->lock);
if (fmt->linked || opts->refcnt) {
ret = -EBUSY;
goto end;
}
ret = __uvcg_iter_frm_intrv(page, len, __uvcg_count_frm_intrv, &n);
if (ret)
goto end;
tmp = frm_intrv = kcalloc(n, sizeof(u32), GFP_KERNEL);
if (!frm_intrv) {
ret = -ENOMEM;
goto end;
}
ret = __uvcg_iter_frm_intrv(page, len, __uvcg_fill_frm_intrv, &tmp);
if (ret) {
kfree(frm_intrv);
goto end;
}
kfree(ch->dw_frame_interval);
ch->dw_frame_interval = frm_intrv;
ch->frame.b_frame_interval_type = n;
ret = len;
end:
mutex_unlock(&opts->lock);
mutex_unlock(su_mutex);
return ret;
}
static struct uvcg_frame_attribute
uvcg_frame_dw_frame_interval =
__CONFIGFS_ATTR(dwFrameInterval, S_IRUGO | S_IWUSR,
uvcg_frame_dw_frame_interval_show,
uvcg_frame_dw_frame_interval_store);
static struct configfs_attribute *uvcg_frame_attrs[] = {
&uvcg_frame_bm_capabilities.attr,
&uvcg_frame_w_width.attr,
&uvcg_frame_w_height.attr,
&uvcg_frame_dw_min_bit_rate.attr,
&uvcg_frame_dw_max_bit_rate.attr,
&uvcg_frame_dw_max_video_frame_buffer_size.attr,
&uvcg_frame_dw_default_frame_interval.attr,
&uvcg_frame_dw_frame_interval.attr,
NULL,
};
struct config_item_type uvcg_frame_type = {
.ct_item_ops = &uvcg_frame_item_ops,
.ct_attrs = uvcg_frame_attrs,
.ct_owner = THIS_MODULE,
};
static struct config_item *uvcg_frame_make(struct config_group *group,
const char *name)
{
struct uvcg_frame *h;
struct uvcg_format *fmt;
struct f_uvc_opts *opts;
struct config_item *opts_item;
h = kzalloc(sizeof(*h), GFP_KERNEL);
if (!h)
return ERR_CAST(h);
h->frame.b_descriptor_type = USB_DT_CS_INTERFACE;
h->frame.b_frame_index = 1;
h->frame.w_width = cpu_to_le16(640);
h->frame.w_height = cpu_to_le16(360);
h->frame.dw_min_bit_rate = cpu_to_le32(18432000);
h->frame.dw_max_bit_rate = cpu_to_le32(55296000);
h->frame.dw_max_video_frame_buffer_size = cpu_to_le32(460800);
h->frame.dw_default_frame_interval = cpu_to_le32(666666);
opts_item = group->cg_item.ci_parent->ci_parent->ci_parent;
opts = to_f_uvc_opts(opts_item);
mutex_lock(&opts->lock);
fmt = to_uvcg_format(&group->cg_item);
if (fmt->type == UVCG_UNCOMPRESSED) {
h->frame.b_descriptor_subtype = UVC_VS_FRAME_UNCOMPRESSED;
h->fmt_type = UVCG_UNCOMPRESSED;
} else if (fmt->type == UVCG_MJPEG) {
h->frame.b_descriptor_subtype = UVC_VS_FRAME_MJPEG;
h->fmt_type = UVCG_MJPEG;
} else {
mutex_unlock(&opts->lock);
return ERR_PTR(-EINVAL);
}
++fmt->num_frames;
mutex_unlock(&opts->lock);
config_item_init_type_name(&h->item, name, &uvcg_frame_type);
return &h->item;
}
void uvcg_frame_drop(struct config_group *group, struct config_item *item)
{
struct uvcg_frame *h = to_uvcg_frame(item);
struct uvcg_format *fmt;
struct f_uvc_opts *opts;
struct config_item *opts_item;
opts_item = group->cg_item.ci_parent->ci_parent->ci_parent;
opts = to_f_uvc_opts(opts_item);
mutex_lock(&opts->lock);
fmt = to_uvcg_format(&group->cg_item);
--fmt->num_frames;
kfree(h);
mutex_unlock(&opts->lock);
}
/* streaming/uncompressed/<NAME> */
struct uvcg_uncompressed {
struct uvcg_format fmt;
struct uvc_format_uncompressed desc;
};
struct uvcg_uncompressed *to_uvcg_uncompressed(struct config_item *item)
{
return container_of(
container_of(to_config_group(item), struct uvcg_format, group),
struct uvcg_uncompressed, fmt);
}
CONFIGFS_ATTR_STRUCT(uvcg_uncompressed);
CONFIGFS_ATTR_OPS(uvcg_uncompressed);
static struct configfs_item_operations uvcg_uncompressed_item_ops = {
.show_attribute = uvcg_uncompressed_attr_show,
.store_attribute = uvcg_uncompressed_attr_store,
};
static struct configfs_group_operations uvcg_uncompressed_group_ops = {
.make_item = uvcg_frame_make,
.drop_item = uvcg_frame_drop,
};
static ssize_t uvcg_uncompressed_guid_format_show(struct uvcg_uncompressed *ch,
char *page)
{
struct f_uvc_opts *opts;
struct config_item *opts_item;
struct mutex *su_mutex = &ch->fmt.group.cg_subsys->su_mutex;
mutex_lock(su_mutex); /* for navigating configfs hierarchy */
opts_item = ch->fmt.group.cg_item.ci_parent->ci_parent->ci_parent;
opts = to_f_uvc_opts(opts_item);
mutex_lock(&opts->lock);
memcpy(page, ch->desc.guidFormat, sizeof(ch->desc.guidFormat));
mutex_unlock(&opts->lock);
mutex_unlock(su_mutex);
return sizeof(ch->desc.guidFormat);
}
static ssize_t uvcg_uncompressed_guid_format_store(struct uvcg_uncompressed *ch,
const char *page, size_t len)
{
struct f_uvc_opts *opts;
struct config_item *opts_item;
struct mutex *su_mutex = &ch->fmt.group.cg_subsys->su_mutex;
int ret;
mutex_lock(su_mutex); /* for navigating configfs hierarchy */
opts_item = ch->fmt.group.cg_item.ci_parent->ci_parent->ci_parent;
opts = to_f_uvc_opts(opts_item);
mutex_lock(&opts->lock);
if (ch->fmt.linked || opts->refcnt) {
ret = -EBUSY;
goto end;
}
memcpy(ch->desc.guidFormat, page,
min(sizeof(ch->desc.guidFormat), len));
ret = sizeof(ch->desc.guidFormat);
end:
mutex_unlock(&opts->lock);
mutex_unlock(su_mutex);
return ret;
}
static struct uvcg_uncompressed_attribute uvcg_uncompressed_guid_format =
__CONFIGFS_ATTR(guidFormat, S_IRUGO | S_IWUSR,
uvcg_uncompressed_guid_format_show,
uvcg_uncompressed_guid_format_store);
#define UVCG_UNCOMPRESSED_ATTR_RO(cname, aname, conv) \
static ssize_t uvcg_uncompressed_##cname##_show( \
struct uvcg_uncompressed *u, char *page) \
{ \
struct f_uvc_opts *opts; \
struct config_item *opts_item; \
struct mutex *su_mutex = &u->fmt.group.cg_subsys->su_mutex; \
int result; \
\
mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
\
opts_item = u->fmt.group.cg_item.ci_parent->ci_parent->ci_parent;\
opts = to_f_uvc_opts(opts_item); \
\
mutex_lock(&opts->lock); \
result = sprintf(page, "%d\n", conv(u->desc.aname)); \
mutex_unlock(&opts->lock); \
\
mutex_unlock(su_mutex); \
return result; \
} \
\
static struct uvcg_uncompressed_attribute \
uvcg_uncompressed_##cname = \
__CONFIGFS_ATTR_RO(aname, uvcg_uncompressed_##cname##_show)
#define UVCG_UNCOMPRESSED_ATTR(cname, aname, conv) \
static ssize_t uvcg_uncompressed_##cname##_show( \
struct uvcg_uncompressed *u, char *page) \
{ \
struct f_uvc_opts *opts; \
struct config_item *opts_item; \
struct mutex *su_mutex = &u->fmt.group.cg_subsys->su_mutex; \
int result; \
\
mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
\
opts_item = u->fmt.group.cg_item.ci_parent->ci_parent->ci_parent;\
opts = to_f_uvc_opts(opts_item); \
\
mutex_lock(&opts->lock); \
result = sprintf(page, "%d\n", conv(u->desc.aname)); \
mutex_unlock(&opts->lock); \
\
mutex_unlock(su_mutex); \
return result; \
} \
\
static ssize_t \
uvcg_uncompressed_##cname##_store(struct uvcg_uncompressed *u, \
const char *page, size_t len) \
{ \
struct f_uvc_opts *opts; \
struct config_item *opts_item; \
struct mutex *su_mutex = &u->fmt.group.cg_subsys->su_mutex; \
int ret; \
u8 num; \
\
mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
\
opts_item = u->fmt.group.cg_item.ci_parent->ci_parent->ci_parent;\
opts = to_f_uvc_opts(opts_item); \
\
mutex_lock(&opts->lock); \
if (u->fmt.linked || opts->refcnt) { \
ret = -EBUSY; \
goto end; \
} \
\
ret = kstrtou8(page, 0, &num); \
if (ret) \
goto end; \
\
if (num > 255) { \
ret = -EINVAL; \
goto end; \
} \
u->desc.aname = num; \
ret = len; \
end: \
mutex_unlock(&opts->lock); \
mutex_unlock(su_mutex); \
return ret; \
} \
\
static struct uvcg_uncompressed_attribute \
uvcg_uncompressed_##cname = \
__CONFIGFS_ATTR(aname, S_IRUGO | S_IWUSR, \
uvcg_uncompressed_##cname##_show, \
uvcg_uncompressed_##cname##_store)
#define identity_conv(x) (x)
UVCG_UNCOMPRESSED_ATTR(b_bits_per_pixel, bBitsPerPixel, identity_conv);
UVCG_UNCOMPRESSED_ATTR(b_default_frame_index, bDefaultFrameIndex,
identity_conv);
UVCG_UNCOMPRESSED_ATTR_RO(b_aspect_ratio_x, bAspectRatioX, identity_conv);
UVCG_UNCOMPRESSED_ATTR_RO(b_aspect_ratio_y, bAspectRatioY, identity_conv);
UVCG_UNCOMPRESSED_ATTR_RO(bm_interface_flags, bmInterfaceFlags, identity_conv);
#undef identity_conv
#undef UVCG_UNCOMPRESSED_ATTR
#undef UVCG_UNCOMPRESSED_ATTR_RO
static inline ssize_t
uvcg_uncompressed_bma_controls_show(struct uvcg_uncompressed *unc, char *page)
{
return uvcg_format_bma_controls_show(&unc->fmt, page);
}
static inline ssize_t
uvcg_uncompressed_bma_controls_store(struct uvcg_uncompressed *ch,
const char *page, size_t len)
{
return uvcg_format_bma_controls_store(&ch->fmt, page, len);
}
static struct uvcg_uncompressed_attribute uvcg_uncompressed_bma_controls =
__CONFIGFS_ATTR(bmaControls, S_IRUGO | S_IWUSR,
uvcg_uncompressed_bma_controls_show,
uvcg_uncompressed_bma_controls_store);
static struct configfs_attribute *uvcg_uncompressed_attrs[] = {
&uvcg_uncompressed_guid_format.attr,
&uvcg_uncompressed_b_bits_per_pixel.attr,
&uvcg_uncompressed_b_default_frame_index.attr,
&uvcg_uncompressed_b_aspect_ratio_x.attr,
&uvcg_uncompressed_b_aspect_ratio_y.attr,
&uvcg_uncompressed_bm_interface_flags.attr,
&uvcg_uncompressed_bma_controls.attr,
NULL,
};
struct config_item_type uvcg_uncompressed_type = {
.ct_item_ops = &uvcg_uncompressed_item_ops,
.ct_group_ops = &uvcg_uncompressed_group_ops,
.ct_attrs = uvcg_uncompressed_attrs,
.ct_owner = THIS_MODULE,
};
static struct config_group *uvcg_uncompressed_make(struct config_group *group,
const char *name)
{
static char guid[] = {
'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00,
0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71
};
struct uvcg_uncompressed *h;
h = kzalloc(sizeof(*h), GFP_KERNEL);
if (!h)
return ERR_CAST(h);
h->desc.bLength = UVC_DT_FORMAT_UNCOMPRESSED_SIZE;
h->desc.bDescriptorType = USB_DT_CS_INTERFACE;
h->desc.bDescriptorSubType = UVC_VS_FORMAT_UNCOMPRESSED;
memcpy(h->desc.guidFormat, guid, sizeof(guid));
h->desc.bBitsPerPixel = 16;
h->desc.bDefaultFrameIndex = 1;
h->desc.bAspectRatioX = 0;
h->desc.bAspectRatioY = 0;
h->desc.bmInterfaceFlags = 0;
h->desc.bCopyProtect = 0;
h->fmt.type = UVCG_UNCOMPRESSED;
config_group_init_type_name(&h->fmt.group, name,
&uvcg_uncompressed_type);
return &h->fmt.group;
}
void uvcg_uncompressed_drop(struct config_group *group,
struct config_item *item)
{
struct uvcg_uncompressed *h = to_uvcg_uncompressed(item);
kfree(h);
}
static struct configfs_group_operations uvcg_uncompressed_grp_ops = {
.make_group = uvcg_uncompressed_make,
.drop_item = uvcg_uncompressed_drop,
};
static struct config_item_type uvcg_uncompressed_grp_type = {
.ct_group_ops = &uvcg_uncompressed_grp_ops,
.ct_owner = THIS_MODULE,
};
/* streaming/mjpeg/<NAME> */
struct uvcg_mjpeg {
struct uvcg_format fmt;
struct uvc_format_mjpeg desc;
};
struct uvcg_mjpeg *to_uvcg_mjpeg(struct config_item *item)
{
return container_of(
container_of(to_config_group(item), struct uvcg_format, group),
struct uvcg_mjpeg, fmt);
}
CONFIGFS_ATTR_STRUCT(uvcg_mjpeg);
CONFIGFS_ATTR_OPS(uvcg_mjpeg);
static struct configfs_item_operations uvcg_mjpeg_item_ops = {
.show_attribute = uvcg_mjpeg_attr_show,
.store_attribute = uvcg_mjpeg_attr_store,
};
static struct configfs_group_operations uvcg_mjpeg_group_ops = {
.make_item = uvcg_frame_make,
.drop_item = uvcg_frame_drop,
};
#define UVCG_MJPEG_ATTR_RO(cname, aname, conv) \
static ssize_t uvcg_mjpeg_##cname##_show(struct uvcg_mjpeg *u, char *page)\
{ \
struct f_uvc_opts *opts; \
struct config_item *opts_item; \
struct mutex *su_mutex = &u->fmt.group.cg_subsys->su_mutex; \
int result; \
\
mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
\
opts_item = u->fmt.group.cg_item.ci_parent->ci_parent->ci_parent;\
opts = to_f_uvc_opts(opts_item); \
\
mutex_lock(&opts->lock); \
result = sprintf(page, "%d\n", conv(u->desc.aname)); \
mutex_unlock(&opts->lock); \
\
mutex_unlock(su_mutex); \
return result; \
} \
\
static struct uvcg_mjpeg_attribute \
uvcg_mjpeg_##cname = \
__CONFIGFS_ATTR_RO(aname, uvcg_mjpeg_##cname##_show)
#define UVCG_MJPEG_ATTR(cname, aname, conv) \
static ssize_t uvcg_mjpeg_##cname##_show(struct uvcg_mjpeg *u, char *page)\
{ \
struct f_uvc_opts *opts; \
struct config_item *opts_item; \
struct mutex *su_mutex = &u->fmt.group.cg_subsys->su_mutex; \
int result; \
\
mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
\
opts_item = u->fmt.group.cg_item.ci_parent->ci_parent->ci_parent;\
opts = to_f_uvc_opts(opts_item); \
\
mutex_lock(&opts->lock); \
result = sprintf(page, "%d\n", conv(u->desc.aname)); \
mutex_unlock(&opts->lock); \
\
mutex_unlock(su_mutex); \
return result; \
} \
\
static ssize_t \
uvcg_mjpeg_##cname##_store(struct uvcg_mjpeg *u, \
const char *page, size_t len) \
{ \
struct f_uvc_opts *opts; \
struct config_item *opts_item; \
struct mutex *su_mutex = &u->fmt.group.cg_subsys->su_mutex; \
int ret; \
u8 num; \
\
mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
\
opts_item = u->fmt.group.cg_item.ci_parent->ci_parent->ci_parent;\
opts = to_f_uvc_opts(opts_item); \
\
mutex_lock(&opts->lock); \
if (u->fmt.linked || opts->refcnt) { \
ret = -EBUSY; \
goto end; \
} \
\
ret = kstrtou8(page, 0, &num); \
if (ret) \
goto end; \
\
if (num > 255) { \
ret = -EINVAL; \
goto end; \
} \
u->desc.aname = num; \
ret = len; \
end: \
mutex_unlock(&opts->lock); \
mutex_unlock(su_mutex); \
return ret; \
} \
\
static struct uvcg_mjpeg_attribute \
uvcg_mjpeg_##cname = \
__CONFIGFS_ATTR(aname, S_IRUGO | S_IWUSR, \
uvcg_mjpeg_##cname##_show, \
uvcg_mjpeg_##cname##_store)
#define identity_conv(x) (x)
UVCG_MJPEG_ATTR(b_default_frame_index, bDefaultFrameIndex,
identity_conv);
UVCG_MJPEG_ATTR_RO(bm_flags, bmFlags, identity_conv);
UVCG_MJPEG_ATTR_RO(b_aspect_ratio_x, bAspectRatioX, identity_conv);
UVCG_MJPEG_ATTR_RO(b_aspect_ratio_y, bAspectRatioY, identity_conv);
UVCG_MJPEG_ATTR_RO(bm_interface_flags, bmInterfaceFlags, identity_conv);
#undef identity_conv
#undef UVCG_MJPEG_ATTR
#undef UVCG_MJPEG_ATTR_RO
static inline ssize_t
uvcg_mjpeg_bma_controls_show(struct uvcg_mjpeg *unc, char *page)
{
return uvcg_format_bma_controls_show(&unc->fmt, page);
}
static inline ssize_t
uvcg_mjpeg_bma_controls_store(struct uvcg_mjpeg *ch,
const char *page, size_t len)
{
return uvcg_format_bma_controls_store(&ch->fmt, page, len);
}
static struct uvcg_mjpeg_attribute uvcg_mjpeg_bma_controls =
__CONFIGFS_ATTR(bmaControls, S_IRUGO | S_IWUSR,
uvcg_mjpeg_bma_controls_show,
uvcg_mjpeg_bma_controls_store);
static struct configfs_attribute *uvcg_mjpeg_attrs[] = {
&uvcg_mjpeg_b_default_frame_index.attr,
&uvcg_mjpeg_bm_flags.attr,
&uvcg_mjpeg_b_aspect_ratio_x.attr,
&uvcg_mjpeg_b_aspect_ratio_y.attr,
&uvcg_mjpeg_bm_interface_flags.attr,
&uvcg_mjpeg_bma_controls.attr,
NULL,
};
struct config_item_type uvcg_mjpeg_type = {
.ct_item_ops = &uvcg_mjpeg_item_ops,
.ct_group_ops = &uvcg_mjpeg_group_ops,
.ct_attrs = uvcg_mjpeg_attrs,
.ct_owner = THIS_MODULE,
};
static struct config_group *uvcg_mjpeg_make(struct config_group *group,
const char *name)
{
struct uvcg_mjpeg *h;
h = kzalloc(sizeof(*h), GFP_KERNEL);
if (!h)
return ERR_CAST(h);
h->desc.bLength = UVC_DT_FORMAT_MJPEG_SIZE;
h->desc.bDescriptorType = USB_DT_CS_INTERFACE;
h->desc.bDescriptorSubType = UVC_VS_FORMAT_MJPEG;
h->desc.bDefaultFrameIndex = 1;
h->desc.bAspectRatioX = 0;
h->desc.bAspectRatioY = 0;
h->desc.bmInterfaceFlags = 0;
h->desc.bCopyProtect = 0;
h->fmt.type = UVCG_MJPEG;
config_group_init_type_name(&h->fmt.group, name,
&uvcg_mjpeg_type);
return &h->fmt.group;
}
void uvcg_mjpeg_drop(struct config_group *group,
struct config_item *item)
{
struct uvcg_mjpeg *h = to_uvcg_mjpeg(item);
kfree(h);
}
static struct configfs_group_operations uvcg_mjpeg_grp_ops = {
.make_group = uvcg_mjpeg_make,
.drop_item = uvcg_mjpeg_drop,
};
static struct config_item_type uvcg_mjpeg_grp_type = {
.ct_group_ops = &uvcg_mjpeg_grp_ops,
.ct_owner = THIS_MODULE,
};
/* streaming/color_matching/default */
static struct uvcg_default_color_matching {
struct config_group group;
} uvcg_default_color_matching;
static inline struct uvcg_default_color_matching
*to_uvcg_default_color_matching(struct config_item *item)
{
return container_of(to_config_group(item),
struct uvcg_default_color_matching, group);
}
CONFIGFS_ATTR_STRUCT(uvcg_default_color_matching);
CONFIGFS_ATTR_OPS_RO(uvcg_default_color_matching);
static struct configfs_item_operations uvcg_default_color_matching_item_ops = {
.show_attribute = uvcg_default_color_matching_attr_show,
};
#define UVCG_DEFAULT_COLOR_MATCHING_ATTR(cname, aname, conv) \
static ssize_t uvcg_default_color_matching_##cname##_show( \
struct uvcg_default_color_matching *dc, char *page) \
{ \
struct f_uvc_opts *opts; \
struct config_item *opts_item; \
struct mutex *su_mutex = &dc->group.cg_subsys->su_mutex; \
struct uvc_color_matching_descriptor *cd; \
int result; \
\
mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \
\
opts_item = dc->group.cg_item.ci_parent->ci_parent->ci_parent; \
opts = to_f_uvc_opts(opts_item); \
cd = &opts->uvc_color_matching; \
\
mutex_lock(&opts->lock); \
result = sprintf(page, "%d\n", conv(cd->aname)); \
mutex_unlock(&opts->lock); \
\
mutex_unlock(su_mutex); \
return result; \
} \
\
static struct uvcg_default_color_matching_attribute \
uvcg_default_color_matching_##cname = \
__CONFIGFS_ATTR_RO(aname, uvcg_default_color_matching_##cname##_show)
#define identity_conv(x) (x)
UVCG_DEFAULT_COLOR_MATCHING_ATTR(b_color_primaries, bColorPrimaries,
identity_conv);
UVCG_DEFAULT_COLOR_MATCHING_ATTR(b_transfer_characteristics,
bTransferCharacteristics, identity_conv);
UVCG_DEFAULT_COLOR_MATCHING_ATTR(b_matrix_coefficients, bMatrixCoefficients,
identity_conv);
#undef identity_conv
#undef UVCG_DEFAULT_COLOR_MATCHING_ATTR
static struct configfs_attribute *uvcg_default_color_matching_attrs[] = {
&uvcg_default_color_matching_b_color_primaries.attr,
&uvcg_default_color_matching_b_transfer_characteristics.attr,
&uvcg_default_color_matching_b_matrix_coefficients.attr,
NULL,
};
static struct config_item_type uvcg_default_color_matching_type = {
.ct_item_ops = &uvcg_default_color_matching_item_ops,
.ct_attrs = uvcg_default_color_matching_attrs,
.ct_owner = THIS_MODULE,
};
/* struct uvcg_color_matching {}; */
static struct config_group *uvcg_color_matching_default_groups[] = {
&uvcg_default_color_matching.group,
NULL,
};
/* streaming/color_matching */
static struct uvcg_color_matching_grp {
struct config_group group;
} uvcg_color_matching_grp;
static struct config_item_type uvcg_color_matching_grp_type = {
.ct_owner = THIS_MODULE,
};
/* streaming/class/{fs|hs|ss} */
static struct uvcg_streaming_class {
struct config_group group;
} uvcg_streaming_class_fs, uvcg_streaming_class_hs, uvcg_streaming_class_ss;
static inline struct uvc_descriptor_header
***__uvcg_get_stream_class_arr(struct config_item *i, struct f_uvc_opts *o)
{
struct uvcg_streaming_class *cl = container_of(to_config_group(i),
struct uvcg_streaming_class, group);
if (cl == &uvcg_streaming_class_fs)
return &o->uvc_fs_streaming_cls;
if (cl == &uvcg_streaming_class_hs)
return &o->uvc_hs_streaming_cls;
if (cl == &uvcg_streaming_class_ss)
return &o->uvc_ss_streaming_cls;
return NULL;
}
enum uvcg_strm_type {
UVCG_HEADER = 0,
UVCG_FORMAT,
UVCG_FRAME
};
static int __uvcg_iter_strm_cls(void *priv1, void *priv2, void *priv3,
int (*fun)(void *, void *, void *, int, enum uvcg_strm_type type))
{
struct uvcg_streaming_header *h = priv1;
struct uvcg_format_ptr *f;
struct config_group *grp;
struct config_item *item;
struct uvcg_frame *frm;
int ret, i, j;
if (!fun)
return -EINVAL;
i = j = 0;
ret = fun(h, priv2, priv3, 0, UVCG_HEADER);
if (ret)
return ret;
list_for_each_entry(f, &h->formats, entry) {
ret = fun(f->fmt, priv2, priv3, i++, UVCG_FORMAT);
if (ret)
return ret;
grp = &f->fmt->group;
list_for_each_entry(item, &grp->cg_children, ci_entry) {
frm = to_uvcg_frame(item);
ret = fun(frm, priv2, priv3, j++, UVCG_FRAME);
if (ret)
return ret;
}
}
return ret;
}
static int __uvcg_cnt_strm(void *priv1, void *priv2, void *priv3, int n,
enum uvcg_strm_type type)
{
size_t *size = priv2;
size_t *count = priv3;
switch (type) {
case UVCG_HEADER: {
struct uvcg_streaming_header *h = priv1;
*size += sizeof(h->desc);
/* bmaControls */
*size += h->num_fmt * UVCG_STREAMING_CONTROL_SIZE;
}
break;
case UVCG_FORMAT: {
struct uvcg_format *fmt = priv1;
if (fmt->type == UVCG_UNCOMPRESSED) {
struct uvcg_uncompressed *u =
container_of(fmt, struct uvcg_uncompressed,
fmt);
*size += sizeof(u->desc);
} else if (fmt->type == UVCG_MJPEG) {
struct uvcg_mjpeg *m =
container_of(fmt, struct uvcg_mjpeg, fmt);
*size += sizeof(m->desc);
} else {
return -EINVAL;
}
}
break;
case UVCG_FRAME: {
struct uvcg_frame *frm = priv1;
int sz = sizeof(frm->dw_frame_interval);
*size += sizeof(frm->frame);
*size += frm->frame.b_frame_interval_type * sz;
}
break;
}
++*count;
return 0;
}
static int __uvcg_fill_strm(void *priv1, void *priv2, void *priv3, int n,
enum uvcg_strm_type type)
{
void **dest = priv2;
struct uvc_descriptor_header ***array = priv3;
size_t sz;
**array = *dest;
++*array;
switch (type) {
case UVCG_HEADER: {
struct uvc_input_header_descriptor *ihdr = *dest;
struct uvcg_streaming_header *h = priv1;
struct uvcg_format_ptr *f;
memcpy(*dest, &h->desc, sizeof(h->desc));
*dest += sizeof(h->desc);
sz = UVCG_STREAMING_CONTROL_SIZE;
list_for_each_entry(f, &h->formats, entry) {
memcpy(*dest, f->fmt->bmaControls, sz);
*dest += sz;
}
ihdr->bLength = sizeof(h->desc) + h->num_fmt * sz;
ihdr->bNumFormats = h->num_fmt;
}
break;
case UVCG_FORMAT: {
struct uvcg_format *fmt = priv1;
if (fmt->type == UVCG_UNCOMPRESSED) {
struct uvc_format_uncompressed *unc = *dest;
struct uvcg_uncompressed *u =
container_of(fmt, struct uvcg_uncompressed,
fmt);
memcpy(*dest, &u->desc, sizeof(u->desc));
*dest += sizeof(u->desc);
unc->bNumFrameDescriptors = fmt->num_frames;
unc->bFormatIndex = n + 1;
} else if (fmt->type == UVCG_MJPEG) {
struct uvc_format_mjpeg *mjp = *dest;
struct uvcg_mjpeg *m =
container_of(fmt, struct uvcg_mjpeg, fmt);
memcpy(*dest, &m->desc, sizeof(m->desc));
*dest += sizeof(m->desc);
mjp->bNumFrameDescriptors = fmt->num_frames;
mjp->bFormatIndex = n + 1;
} else {
return -EINVAL;
}
}
break;
case UVCG_FRAME: {
struct uvcg_frame *frm = priv1;
struct uvc_descriptor_header *h = *dest;
sz = sizeof(frm->frame);
memcpy(*dest, &frm->frame, sz);
*dest += sz;
sz = frm->frame.b_frame_interval_type *
sizeof(*frm->dw_frame_interval);
memcpy(*dest, frm->dw_frame_interval, sz);
*dest += sz;
if (frm->fmt_type == UVCG_UNCOMPRESSED)
h->bLength = UVC_DT_FRAME_UNCOMPRESSED_SIZE(
frm->frame.b_frame_interval_type);
else if (frm->fmt_type == UVCG_MJPEG)
h->bLength = UVC_DT_FRAME_MJPEG_SIZE(
frm->frame.b_frame_interval_type);
}
break;
}
return 0;
}
static int uvcg_streaming_class_allow_link(struct config_item *src,
struct config_item *target)
{
struct config_item *streaming, *header;
struct f_uvc_opts *opts;
struct mutex *su_mutex = &src->ci_group->cg_subsys->su_mutex;
struct uvc_descriptor_header ***class_array, **cl_arr;
struct uvcg_streaming_header *target_hdr;
void *data;
size_t size = 0, count = 0;
int ret = -EINVAL;
mutex_lock(su_mutex); /* for navigating configfs hierarchy */
streaming = src->ci_parent->ci_parent;
header = config_group_find_item(to_config_group(streaming), "header");
if (!header || target->ci_parent != header)
goto out;
opts = to_f_uvc_opts(streaming->ci_parent);
mutex_lock(&opts->lock);
class_array = __uvcg_get_stream_class_arr(src, opts);
if (!class_array || *class_array || opts->refcnt) {
ret = -EBUSY;
goto unlock;
}
target_hdr = to_uvcg_streaming_header(target);
ret = __uvcg_iter_strm_cls(target_hdr, &size, &count, __uvcg_cnt_strm);
if (ret)
goto unlock;
count += 2; /* color_matching, NULL */
*class_array = kcalloc(count, sizeof(void *), GFP_KERNEL);
if (!*class_array) {
ret = PTR_ERR(*class_array);
goto unlock;
}
data = kzalloc(size, GFP_KERNEL);
if (!data) {
kfree(*class_array);
*class_array = NULL;
ret = PTR_ERR(data);
goto unlock;
}
cl_arr = *class_array;
ret = __uvcg_iter_strm_cls(target_hdr, &data, &cl_arr,
__uvcg_fill_strm);
if (ret) {
kfree(*class_array);
*class_array = NULL;
kfree(data);
goto unlock;
}
*cl_arr = (struct uvc_descriptor_header *)&opts->uvc_color_matching;
++target_hdr->linked;
ret = 0;
unlock:
mutex_unlock(&opts->lock);
out:
mutex_unlock(su_mutex);
return ret;
}
static int uvcg_streaming_class_drop_link(struct config_item *src,
struct config_item *target)
{
struct config_item *streaming, *header;
struct f_uvc_opts *opts;
struct mutex *su_mutex = &src->ci_group->cg_subsys->su_mutex;
struct uvc_descriptor_header ***class_array;
struct uvcg_streaming_header *target_hdr;
int ret = -EINVAL;
mutex_lock(su_mutex); /* for navigating configfs hierarchy */
streaming = src->ci_parent->ci_parent;
header = config_group_find_item(to_config_group(streaming), "header");
if (!header || target->ci_parent != header)
goto out;
opts = to_f_uvc_opts(streaming->ci_parent);
mutex_lock(&opts->lock);
class_array = __uvcg_get_stream_class_arr(src, opts);
if (!class_array || !*class_array)
goto unlock;
if (opts->refcnt) {
ret = -EBUSY;
goto unlock;
}
target_hdr = to_uvcg_streaming_header(target);
--target_hdr->linked;
kfree(**class_array);
kfree(*class_array);
*class_array = NULL;
ret = 0;
unlock:
mutex_unlock(&opts->lock);
out:
mutex_unlock(su_mutex);
return ret;
}
static struct configfs_item_operations uvcg_streaming_class_item_ops = {
.allow_link = uvcg_streaming_class_allow_link,
.drop_link = uvcg_streaming_class_drop_link,
};
static struct config_item_type uvcg_streaming_class_type = {
.ct_item_ops = &uvcg_streaming_class_item_ops,
.ct_owner = THIS_MODULE,
};
static struct config_group *uvcg_streaming_class_default_groups[] = {
&uvcg_streaming_class_fs.group,
&uvcg_streaming_class_hs.group,
&uvcg_streaming_class_ss.group,
NULL,
};
/* streaming/class */
static struct uvcg_streaming_class_grp {
struct config_group group;
} uvcg_streaming_class_grp;
static struct config_item_type uvcg_streaming_class_grp_type = {
.ct_owner = THIS_MODULE,
};
static struct config_group *uvcg_streaming_default_groups[] = {
&uvcg_streaming_header_grp.group,
&uvcg_uncompressed_grp.group,
&uvcg_mjpeg_grp.group,
&uvcg_color_matching_grp.group,
&uvcg_streaming_class_grp.group,
NULL,
};
/* streaming */
static struct uvcg_streaming_grp {
struct config_group group;
} uvcg_streaming_grp;
static struct config_item_type uvcg_streaming_grp_type = {
.ct_owner = THIS_MODULE,
};
static struct config_group *uvcg_default_groups[] = {
&uvcg_control_grp.group,
&uvcg_streaming_grp.group,
NULL,
};
static inline struct f_uvc_opts *to_f_uvc_opts(struct config_item *item)
{
return container_of(to_config_group(item), struct f_uvc_opts,
func_inst.group);
}
CONFIGFS_ATTR_STRUCT(f_uvc_opts);
CONFIGFS_ATTR_OPS(f_uvc_opts);
static void uvc_attr_release(struct config_item *item)
{
struct f_uvc_opts *opts = to_f_uvc_opts(item);
usb_put_function_instance(&opts->func_inst);
}
static struct configfs_item_operations uvc_item_ops = {
.release = uvc_attr_release,
.show_attribute = f_uvc_opts_attr_show,
.store_attribute = f_uvc_opts_attr_store,
};
#define UVCG_OPTS_ATTR(cname, conv, str2u, uxx, vnoc, limit) \
static ssize_t f_uvc_opts_##cname##_show( \
struct f_uvc_opts *opts, char *page) \
{ \
int result; \
\
mutex_lock(&opts->lock); \
result = sprintf(page, "%d\n", conv(opts->cname)); \
mutex_unlock(&opts->lock); \
\
return result; \
} \
\
static ssize_t \
f_uvc_opts_##cname##_store(struct f_uvc_opts *opts, \
const char *page, size_t len) \
{ \
int ret; \
uxx num; \
\
mutex_lock(&opts->lock); \
if (opts->refcnt) { \
ret = -EBUSY; \
goto end; \
} \
\
ret = str2u(page, 0, &num); \
if (ret) \
goto end; \
\
if (num > limit) { \
ret = -EINVAL; \
goto end; \
} \
opts->cname = vnoc(num); \
ret = len; \
end: \
mutex_unlock(&opts->lock); \
return ret; \
} \
\
static struct f_uvc_opts_attribute \
f_uvc_opts_attribute_##cname = \
__CONFIGFS_ATTR(cname, S_IRUGO | S_IWUSR, \
f_uvc_opts_##cname##_show, \
f_uvc_opts_##cname##_store)
#define identity_conv(x) (x)
UVCG_OPTS_ATTR(streaming_interval, identity_conv, kstrtou8, u8, identity_conv,
16);
UVCG_OPTS_ATTR(streaming_maxpacket, le16_to_cpu, kstrtou16, u16, le16_to_cpu,
3072);
UVCG_OPTS_ATTR(streaming_maxburst, identity_conv, kstrtou8, u8, identity_conv,
15);
#undef identity_conv
#undef UVCG_OPTS_ATTR
static struct configfs_attribute *uvc_attrs[] = {
&f_uvc_opts_attribute_streaming_interval.attr,
&f_uvc_opts_attribute_streaming_maxpacket.attr,
&f_uvc_opts_attribute_streaming_maxburst.attr,
NULL,
};
static struct config_item_type uvc_func_type = {
.ct_item_ops = &uvc_item_ops,
.ct_attrs = uvc_attrs,
.ct_owner = THIS_MODULE,
};
static inline void uvcg_init_group(struct config_group *g,
struct config_group **default_groups,
const char *name,
struct config_item_type *type)
{
g->default_groups = default_groups;
config_group_init_type_name(g, name, type);
}
int uvcg_attach_configfs(struct f_uvc_opts *opts)
{
config_group_init_type_name(&uvcg_control_header_grp.group,
"header",
&uvcg_control_header_grp_type);
config_group_init_type_name(&uvcg_default_processing.group,
"default",
&uvcg_default_processing_type);
uvcg_init_group(&uvcg_processing_grp.group,
uvcg_processing_default_groups,
"processing",
&uvcg_processing_grp_type);
config_group_init_type_name(&uvcg_default_camera.group,
"default",
&uvcg_default_camera_type);
uvcg_init_group(&uvcg_camera_grp.group,
uvcg_camera_default_groups,
"camera",
&uvcg_camera_grp_type);
config_group_init_type_name(&uvcg_default_output.group,
"default",
&uvcg_default_output_type);
uvcg_init_group(&uvcg_output_grp.group,
uvcg_output_default_groups,
"output",
&uvcg_output_grp_type);
uvcg_init_group(&uvcg_terminal_grp.group,
uvcg_terminal_default_groups,
"terminal",
&uvcg_terminal_grp_type);
config_group_init_type_name(&uvcg_control_class_fs.group,
"fs",
&uvcg_control_class_type);
config_group_init_type_name(&uvcg_control_class_ss.group,
"ss",
&uvcg_control_class_type);
uvcg_init_group(&uvcg_control_class_grp.group,
uvcg_control_class_default_groups,
"class",
&uvcg_control_class_grp_type);
uvcg_init_group(&uvcg_control_grp.group,
uvcg_control_default_groups,
"control",
&uvcg_control_grp_type);
config_group_init_type_name(&uvcg_streaming_header_grp.group,
"header",
&uvcg_streaming_header_grp_type);
config_group_init_type_name(&uvcg_uncompressed_grp.group,
"uncompressed",
&uvcg_uncompressed_grp_type);
config_group_init_type_name(&uvcg_mjpeg_grp.group,
"mjpeg",
&uvcg_mjpeg_grp_type);
config_group_init_type_name(&uvcg_default_color_matching.group,
"default",
&uvcg_default_color_matching_type);
uvcg_init_group(&uvcg_color_matching_grp.group,
uvcg_color_matching_default_groups,
"color_matching",
&uvcg_color_matching_grp_type);
config_group_init_type_name(&uvcg_streaming_class_fs.group,
"fs",
&uvcg_streaming_class_type);
config_group_init_type_name(&uvcg_streaming_class_hs.group,
"hs",
&uvcg_streaming_class_type);
config_group_init_type_name(&uvcg_streaming_class_ss.group,
"ss",
&uvcg_streaming_class_type);
uvcg_init_group(&uvcg_streaming_class_grp.group,
uvcg_streaming_class_default_groups,
"class",
&uvcg_streaming_class_grp_type);
uvcg_init_group(&uvcg_streaming_grp.group,
uvcg_streaming_default_groups,
"streaming",
&uvcg_streaming_grp_type);
uvcg_init_group(&opts->func_inst.group,
uvcg_default_groups,
"",
&uvc_func_type);
return 0;
}
/*
* uvc_configfs.h
*
* Configfs support for the uvc function.
*
* Copyright (c) 2014 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef UVC_CONFIGFS_H
#define UVC_CONFIGFS_H
struct f_uvc_opts;
int uvcg_attach_configfs(struct f_uvc_opts *opts);
#endif /* UVC_CONFIGFS_H */
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