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usb: gadget: webcam: convert webcam to new interface of f_uvc 

Use the new function interface of f_uvc.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Tested-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Andrzej Pietrasiewicz 2014-09-09 02:02:11 +03:00 committed by Felipe Balbi
parent 6d11ed76c4
commit c913881ec6
3 changed files with 40 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/usb/gadget/legacy/Kconfig
View File

@ -468,6 +468,7 @@ config USB_G_WEBCAM
depends on VIDEO_DEV
select USB_LIBCOMPOSITE
select VIDEOBUF2_VMALLOC
select USB_F_UVC
help
The Webcam Gadget acts as a composite USB Audio and Video Class
device. It provides a userspace API to process UVC control requests

2
drivers/usb/gadget/legacy/Makefile
View File

@ -19,7 +19,7 @@ g_multi-y := multi.o
g_hid-y := hid.o
g_dbgp-y := dbgp.o
g_nokia-y := nokia.o
g_webcam-y := webcam.o ../function/uvc_queue.o ../function/uvc_v4l2.o ../function/uvc_video.o
g_webcam-y := webcam.o
g_ncm-y := ncm.o
g_acm_ms-y := acm_ms.o
g_tcm_usb_gadget-y := tcm_usb_gadget.o

53
drivers/usb/gadget/legacy/webcam.c
View File

@ -15,15 +15,7 @@
#include <linux/module.h>
#include <linux/usb/video.h>
/*
* Kbuild is not very cooperative with respect to linking separately
* compiled library objects into one module. So for now we won't use
* separate compilation ... ensuring init/exit sections work to shrink
* the runtime footprint, and giving us at least some parts of what
* a "gcc --combine ... part1.c part2.c part3.c ... " build would.
*/
#define USBF_UVC_INCLUDED
#include "f_uvc.c"
#include "u_uvc.h"
USB_GADGET_COMPOSITE_OPTIONS();
@ -79,6 +71,9 @@ static struct usb_gadget_strings *webcam_device_strings[] = {
NULL,
};
static struct usb_function_instance *fi_uvc;
static struct usb_function *f_uvc;
static struct usb_device_descriptor webcam_device_descriptor = {
.bLength = USB_DT_DEVICE_SIZE,
.bDescriptorType = USB_DT_DEVICE,
@ -342,11 +337,17 @@ static const struct uvc_descriptor_header * const uvc_ss_streaming_cls[] = {
static int __init
webcam_config_bind(struct usb_configuration *c)
{
return uvc_bind_config(c, uvc_fs_control_cls,
uvc_ss_control_cls, uvc_fs_streaming_cls,
uvc_hs_streaming_cls, uvc_ss_streaming_cls,
streaming_interval, streaming_maxpacket,
streaming_maxburst, trace);
int status = 0;
f_uvc = usb_get_function(fi_uvc);
if (IS_ERR(f_uvc))
return PTR_ERR(f_uvc);
status = usb_add_function(c, f_uvc);
if (status < 0)
usb_put_function(f_uvc);
return status;
}
static struct usb_configuration webcam_config_driver = {
@ -360,14 +361,36 @@ static struct usb_configuration webcam_config_driver = {
static int /* __init_or_exit */
webcam_unbind(struct usb_composite_dev *cdev)
{
if (!IS_ERR_OR_NULL(f_uvc))
usb_put_function(f_uvc);
if (!IS_ERR_OR_NULL(fi_uvc))
usb_put_function_instance(fi_uvc);
return 0;
}
static int __init
webcam_bind(struct usb_composite_dev *cdev)
{
struct f_uvc_opts *uvc_opts;
int ret;
fi_uvc = usb_get_function_instance("uvc");
if (IS_ERR(fi_uvc))
return PTR_ERR(fi_uvc);
uvc_opts = container_of(fi_uvc, struct f_uvc_opts, func_inst);
uvc_opts->streaming_interval = streaming_interval;
uvc_opts->streaming_maxpacket = streaming_maxpacket;
uvc_opts->streaming_maxburst = streaming_maxburst;
uvc_set_trace_param(trace);
uvc_opts->fs_control = uvc_fs_control_cls;
uvc_opts->ss_control = uvc_ss_control_cls;
uvc_opts->fs_streaming = uvc_fs_streaming_cls;
uvc_opts->hs_streaming = uvc_hs_streaming_cls;
uvc_opts->ss_streaming = uvc_ss_streaming_cls;
/* Allocate string descriptor numbers ... note that string contents
* can be overridden by the composite_dev glue.
*/
@ -391,7 +414,7 @@ webcam_bind(struct usb_composite_dev *cdev)
return 0;
error:
webcam_unbind(cdev);
usb_put_function_instance(fi_uvc);
return ret;
}