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usb: gadget: f_uvc: convert f_uvc to new function interface

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Use the new function registration interface. It is required
in order to integrate configfs support.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Tested-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
[Updated copyright years]
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Andrzej Pietrasiewicz 2014-09-09 02:02:10 +03:00 committed by Felipe Balbi
parent 3a83c16ef0
commit 6d11ed76c4
5 changed files with 219 additions and 30 deletions
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3
drivers/usb/gadget/Kconfig
View file

@ -187,6 +187,9 @@ config USB_F_UAC1
config USB_F_UAC2
tristate
config USB_F_UVC
tristate
choice
tristate "USB Gadget Drivers"
default USB_ETH

2
drivers/usb/gadget/function/Makefile
View file

@ -36,3 +36,5 @@ 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
obj-$(CONFIG_USB_F_UVC) += usb_f_uvc.o

204
drivers/usb/gadget/function/f_uvc.c
View file

@ -11,6 +11,7 @@
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/fs.h>
@ -29,11 +30,14 @@
#include "uvc.h"
#include "uvc_v4l2.h"
#include "uvc_video.h"
#include "u_uvc.h"
unsigned int uvc_gadget_trace_param;
#ifdef USBF_UVC_INCLUDED
static unsigned int streaming_interval;
static unsigned int streaming_maxpacket;
static unsigned int streaming_maxburst;
#endif
/* --------------------------------------------------------------------------
* Function descriptors
@ -65,7 +69,7 @@ static struct usb_gadget_strings *uvc_function_strings[] = {
#define UVC_STATUS_MAX_PACKET_SIZE 16 /* 16 bytes status */
static struct usb_interface_assoc_descriptor uvc_iad __initdata = {
static struct usb_interface_assoc_descriptor uvc_iad = {
.bLength = sizeof(uvc_iad),
.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
.bFirstInterface = 0,
@ -76,7 +80,7 @@ static struct usb_interface_assoc_descriptor uvc_iad __initdata = {
.iFunction = 0,
};
static struct usb_interface_descriptor uvc_control_intf __initdata = {
static struct usb_interface_descriptor uvc_control_intf = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = UVC_INTF_VIDEO_CONTROL,
@ -88,7 +92,7 @@ static struct usb_interface_descriptor uvc_control_intf __initdata = {
.iInterface = 0,
};
static struct usb_endpoint_descriptor uvc_control_ep __initdata = {
static struct usb_endpoint_descriptor uvc_control_ep = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN,
@ -97,7 +101,7 @@ static struct usb_endpoint_descriptor uvc_control_ep __initdata = {
.bInterval = 8,
};
static struct usb_ss_ep_comp_descriptor uvc_ss_control_comp __initdata = {
static struct usb_ss_ep_comp_descriptor uvc_ss_control_comp = {
.bLength = sizeof(uvc_ss_control_comp),
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
/* The following 3 values can be tweaked if necessary. */
@ -106,14 +110,14 @@ static struct usb_ss_ep_comp_descriptor uvc_ss_control_comp __initdata = {
.wBytesPerInterval = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
};
static struct uvc_control_endpoint_descriptor uvc_control_cs_ep __initdata = {
static struct uvc_control_endpoint_descriptor uvc_control_cs_ep = {
.bLength = UVC_DT_CONTROL_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_CS_ENDPOINT,
.bDescriptorSubType = UVC_EP_INTERRUPT,
.wMaxTransferSize = cpu_to_le16(UVC_STATUS_MAX_PACKET_SIZE),
};
static struct usb_interface_descriptor uvc_streaming_intf_alt0 __initdata = {
static struct usb_interface_descriptor uvc_streaming_intf_alt0 = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = UVC_INTF_VIDEO_STREAMING,
@ -125,7 +129,7 @@ static struct usb_interface_descriptor uvc_streaming_intf_alt0 __initdata = {
.iInterface = 0,
};
static struct usb_interface_descriptor uvc_streaming_intf_alt1 __initdata = {
static struct usb_interface_descriptor uvc_streaming_intf_alt1 = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = UVC_INTF_VIDEO_STREAMING,
@ -137,7 +141,7 @@ static struct usb_interface_descriptor uvc_streaming_intf_alt1 __initdata = {
.iInterface = 0,
};
static struct usb_endpoint_descriptor uvc_fs_streaming_ep __initdata = {
static struct usb_endpoint_descriptor uvc_fs_streaming_ep = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN,
@ -148,7 +152,7 @@ static struct usb_endpoint_descriptor uvc_fs_streaming_ep __initdata = {
*/
};
static struct usb_endpoint_descriptor uvc_hs_streaming_ep __initdata = {
static struct usb_endpoint_descriptor uvc_hs_streaming_ep = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN,
@ -159,7 +163,7 @@ static struct usb_endpoint_descriptor uvc_hs_streaming_ep __initdata = {
*/
};
static struct usb_endpoint_descriptor uvc_ss_streaming_ep __initdata = {
static struct usb_endpoint_descriptor uvc_ss_streaming_ep = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
@ -171,7 +175,7 @@ static struct usb_endpoint_descriptor uvc_ss_streaming_ep __initdata = {
*/
};
static struct usb_ss_ep_comp_descriptor uvc_ss_streaming_comp __initdata = {
static struct usb_ss_ep_comp_descriptor uvc_ss_streaming_comp = {
.bLength = sizeof(uvc_ss_streaming_comp),
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
/* The bMaxBurst, bmAttributes and wBytesPerInterval values will be
@ -198,6 +202,16 @@ static const struct usb_descriptor_header * const uvc_ss_streaming[] = {
NULL,
};
#ifndef USBF_UVC_INCLUDED
void uvc_set_trace_param(unsigned int trace)
{
uvc_gadget_trace_param = trace;
}
EXPORT_SYMBOL(uvc_set_trace_param);
#endif
/* --------------------------------------------------------------------------
* Control requests
*/
@ -432,7 +446,7 @@ uvc_register_video(struct uvc_device *uvc)
} \
} while (0)
static struct usb_descriptor_header ** __init
static struct usb_descriptor_header **
uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
{
struct uvc_input_header_descriptor *uvc_streaming_header;
@ -552,6 +566,7 @@ uvc_copy_descriptors(struct uvc_device *uvc, enum usb_device_speed speed)
return hdr;
}
#ifdef USBF_UVC_INCLUDED
static void
uvc_function_unbind(struct usb_configuration *c, struct usb_function *f)
{
@ -573,8 +588,9 @@ uvc_function_unbind(struct usb_configuration *c, struct usb_function *f)
kfree(uvc);
}
#endif
static int __init
static int
uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
{
struct usb_composite_dev *cdev = c->cdev;
@ -582,10 +598,14 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
unsigned int max_packet_mult;
unsigned int max_packet_size;
struct usb_ep *ep;
#ifndef USBF_UVC_INCLUDED
struct f_uvc_opts *opts;
#endif
int ret = -EINVAL;
INFO(cdev, "uvc_function_bind\n");
#ifdef USBF_UVC_INCLUDED
/* Sanity check the streaming endpoint module parameters.
*/
streaming_interval = clamp(streaming_interval, 1U, 16U);
@ -622,6 +642,46 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
uvc_ss_streaming_comp.bMaxBurst = streaming_maxburst;
uvc_ss_streaming_comp.wBytesPerInterval =
max_packet_size * max_packet_mult * streaming_maxburst;
#else
opts = to_f_uvc_opts(f->fi);
/* Sanity check the streaming endpoint module parameters.
*/
opts->streaming_interval = clamp(opts->streaming_interval, 1U, 16U);
opts->streaming_maxpacket = clamp(opts->streaming_maxpacket, 1U, 3072U);
opts->streaming_maxburst = min(opts->streaming_maxburst, 15U);
/* Fill in the FS/HS/SS Video Streaming specific descriptors from the
* module parameters.
*
* NOTE: We assume that the user knows what they are doing and won't
* give parameters that their UDC doesn't support.
*/
if (opts->streaming_maxpacket <= 1024) {
max_packet_mult = 1;
max_packet_size = opts->streaming_maxpacket;
} else if (opts->streaming_maxpacket <= 2048) {
max_packet_mult = 2;
max_packet_size = opts->streaming_maxpacket / 2;
} else {
max_packet_mult = 3;
max_packet_size = opts->streaming_maxpacket / 3;
}
uvc_fs_streaming_ep.wMaxPacketSize =
min(opts->streaming_maxpacket, 1023U);
uvc_fs_streaming_ep.bInterval = opts->streaming_interval;
uvc_hs_streaming_ep.wMaxPacketSize = max_packet_size;
uvc_hs_streaming_ep.wMaxPacketSize |= ((max_packet_mult - 1) << 11);
uvc_hs_streaming_ep.bInterval = opts->streaming_interval;
uvc_ss_streaming_ep.wMaxPacketSize = max_packet_size;
uvc_ss_streaming_ep.bInterval = opts->streaming_interval;
uvc_ss_streaming_comp.bmAttributes = max_packet_mult - 1;
uvc_ss_streaming_comp.bMaxBurst = opts->streaming_maxburst;
uvc_ss_streaming_comp.wBytesPerInterval =
max_packet_size * max_packet_mult * opts->streaming_maxburst;
#endif
/* Allocate endpoints. */
ep = usb_ep_autoconfig(cdev->gadget, &uvc_control_ep);
@ -651,6 +711,23 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
uvc_hs_streaming_ep.bEndpointAddress = uvc->video.ep->address;
uvc_ss_streaming_ep.bEndpointAddress = uvc->video.ep->address;
/* String descriptors are global, we only need to allocate string IDs
* for the first UVC function. UVC functions beyond the first (if any)
* will reuse the same IDs.
*/
if (uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id == 0) {
ret = usb_string_ids_tab(c->cdev, uvc_en_us_strings);
if (ret)
goto error;
uvc_iad.iFunction =
uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id;
uvc_control_intf.iInterface =
uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id;
ret = uvc_en_us_strings[UVC_STRING_STREAMING_IDX].id;
uvc_streaming_intf_alt0.iInterface = ret;
uvc_streaming_intf_alt1.iInterface = ret;
}
/* Allocate interface IDs. */
if ((ret = usb_interface_id(c, f)) < 0)
goto error;
@ -730,6 +807,7 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
* USB gadget function
*/
#ifdef USBF_UVC_INCLUDED
/**
* uvc_bind_config - add a UVC function to a configuration
* @c: the configuration to support the UVC instance
@ -796,23 +874,6 @@ uvc_bind_config(struct usb_configuration *c,
uvc->desc.hs_streaming = hs_streaming;
uvc->desc.ss_streaming = ss_streaming;
/* String descriptors are global, we only need to allocate string IDs
* for the first UVC function. UVC functions beyond the first (if any)
* will reuse the same IDs.
*/
if (uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id == 0) {
ret = usb_string_ids_tab(c->cdev, uvc_en_us_strings);
if (ret)
goto error;
uvc_iad.iFunction =
uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id;
uvc_control_intf.iInterface =
uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id;
ret = uvc_en_us_strings[UVC_STRING_STREAMING_IDX].id;
uvc_streaming_intf_alt0.iInterface = ret;
uvc_streaming_intf_alt1.iInterface = ret;
}
/* Register the function. */
uvc->func.name = "uvc";
uvc->func.strings = uvc_function_strings;
@ -834,4 +895,87 @@ uvc_bind_config(struct usb_configuration *c,
return ret;
}
#else
static void uvc_free_inst(struct usb_function_instance *f)
{
struct f_uvc_opts *opts = to_f_uvc_opts(f);
kfree(opts);
}
static struct usb_function_instance *uvc_alloc_inst(void)
{
struct f_uvc_opts *opts;
opts = kzalloc(sizeof(*opts), GFP_KERNEL);
if (!opts)
return ERR_PTR(-ENOMEM);
opts->func_inst.free_func_inst = uvc_free_inst;
return &opts->func_inst;
}
static void uvc_free(struct usb_function *f)
{
struct uvc_device *uvc = to_uvc(f);
kfree(uvc);
}
static void uvc_unbind(struct usb_configuration *c, struct usb_function *f)
{
struct usb_composite_dev *cdev = c->cdev;
struct uvc_device *uvc = to_uvc(f);
INFO(cdev, "%s\n", __func__);
video_unregister_device(uvc->vdev);
v4l2_device_unregister(&uvc->v4l2_dev);
uvc->control_ep->driver_data = NULL;
uvc->video.ep->driver_data = NULL;
uvc_en_us_strings[UVC_STRING_CONTROL_IDX].id = 0;
usb_ep_free_request(cdev->gadget->ep0, uvc->control_req);
kfree(uvc->control_buf);
usb_free_all_descriptors(f);
}
struct usb_function *uvc_alloc(struct usb_function_instance *fi)
{
struct uvc_device *uvc;
struct f_uvc_opts *opts;
uvc = kzalloc(sizeof(*uvc), GFP_KERNEL);
if (uvc == NULL)
return ERR_PTR(-ENOMEM);
uvc->state = UVC_STATE_DISCONNECTED;
opts = to_f_uvc_opts(fi);
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;
/* Register the function. */
uvc->func.name = "uvc";
uvc->func.strings = uvc_function_strings;
uvc->func.bind = uvc_function_bind;
uvc->func.unbind = uvc_unbind;
uvc->func.get_alt = uvc_function_get_alt;
uvc->func.set_alt = uvc_function_set_alt;
uvc->func.disable = uvc_function_disable;
uvc->func.setup = uvc_function_setup;
uvc->func.free_func = uvc_free;
return &uvc->func;
}
DECLARE_USB_FUNCTION_INIT(uvc, uvc_alloc_inst, uvc_alloc);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Laurent Pinchart");
#endif

39
drivers/usb/gadget/function/u_uvc.h Normal file
View file

@ -0,0 +1,39 @@
/*
* u_uvc.h
*
* Utility definitions for the uvc function
*
* Copyright (c) 2013-2014 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 U_UVC_H
#define U_UVC_H
#include <linux/usb/composite.h>
#define to_f_uvc_opts(f) container_of(f, struct f_uvc_opts, func_inst)
struct f_uvc_opts {
struct usb_function_instance func_inst;
unsigned int uvc_gadget_trace_param;
unsigned int streaming_interval;
unsigned int streaming_maxpacket;
unsigned int streaming_maxburst;
const struct uvc_descriptor_header * const *fs_control;
const struct uvc_descriptor_header * const *ss_control;
const struct uvc_descriptor_header * const *fs_streaming;
const struct uvc_descriptor_header * const *hs_streaming;
const struct uvc_descriptor_header * const *ss_streaming;
};
void uvc_set_trace_param(unsigned int trace);
#endif /* U_UVC_H */

1
drivers/usb/gadget/legacy/webcam.c
View file

@ -22,6 +22,7 @@
* 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"
USB_GADGET_COMPOSITE_OPTIONS();