2008-07-01 01:04:50 +07:00
|
|
|
/*
|
|
|
|
* uvc_status.c -- USB Video Class driver - Status endpoint
|
|
|
|
*
|
2010-09-20 16:10:10 +07:00
|
|
|
* Copyright (C) 2005-2009
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|
* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
|
2008-07-01 01:04:50 +07:00
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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*/
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#include <linux/kernel.h>
|
|
|
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#include <linux/input.h>
|
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 15:04:11 +07:00
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#include <linux/slab.h>
|
2008-07-01 01:04:50 +07:00
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#include <linux/usb.h>
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#include <linux/usb/input.h>
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#include "uvcvideo.h"
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/* --------------------------------------------------------------------------
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* Input device
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*/
|
2008-07-08 09:04:29 +07:00
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#ifdef CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV
|
2008-07-01 01:04:50 +07:00
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static int uvc_input_init(struct uvc_device *dev)
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{
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struct input_dev *input;
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int ret;
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input = input_allocate_device();
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if (input == NULL)
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return -ENOMEM;
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|
2009-01-22 22:45:10 +07:00
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|
usb_make_path(dev->udev, dev->input_phys, sizeof(dev->input_phys));
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strlcat(dev->input_phys, "/button", sizeof(dev->input_phys));
|
2008-07-01 01:04:50 +07:00
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input->name = dev->name;
|
2009-01-22 22:45:10 +07:00
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input->phys = dev->input_phys;
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usb_to_input_id(dev->udev, &input->id);
|
2008-07-01 01:04:50 +07:00
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input->dev.parent = &dev->intf->dev;
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2009-01-11 14:44:22 +07:00
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__set_bit(EV_KEY, input->evbit);
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__set_bit(KEY_CAMERA, input->keybit);
|
2008-07-01 01:04:50 +07:00
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if ((ret = input_register_device(input)) < 0)
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goto error;
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dev->input = input;
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return 0;
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error:
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input_free_device(input);
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return ret;
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}
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static void uvc_input_cleanup(struct uvc_device *dev)
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{
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if (dev->input)
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input_unregister_device(dev->input);
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}
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2008-07-08 09:04:29 +07:00
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static void uvc_input_report_key(struct uvc_device *dev, unsigned int code,
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int value)
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{
|
2009-01-11 14:44:22 +07:00
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if (dev->input) {
|
2008-07-08 09:04:29 +07:00
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input_report_key(dev->input, code, value);
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2009-01-11 14:44:22 +07:00
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input_sync(dev->input);
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}
|
2008-07-08 09:04:29 +07:00
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}
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#else
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#define uvc_input_init(dev)
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#define uvc_input_cleanup(dev)
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#define uvc_input_report_key(dev, code, value)
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#endif /* CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV */
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2008-07-01 01:04:50 +07:00
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/* --------------------------------------------------------------------------
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* Status interrupt endpoint
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*/
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2018-07-26 15:17:53 +07:00
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struct uvc_streaming_status {
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u8 bStatusType;
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u8 bOriginator;
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u8 bEvent;
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u8 bValue[];
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} __packed;
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struct uvc_control_status {
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u8 bStatusType;
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u8 bOriginator;
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u8 bEvent;
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u8 bSelector;
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|
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u8 bAttribute;
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u8 bValue[];
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} __packed;
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static void uvc_event_streaming(struct uvc_device *dev,
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struct uvc_streaming_status *status, int len)
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2008-07-01 01:04:50 +07:00
|
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{
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if (len < 3) {
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uvc_trace(UVC_TRACE_STATUS, "Invalid streaming status event "
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|
|
"received.\n");
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return;
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|
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|
}
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|
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|
2018-07-26 15:17:53 +07:00
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|
|
if (status->bEvent == 0) {
|
2008-07-01 01:04:50 +07:00
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|
|
if (len < 4)
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return;
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|
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|
uvc_trace(UVC_TRACE_STATUS, "Button (intf %u) %s len %d\n",
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2018-07-26 15:17:53 +07:00
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|
status->bOriginator,
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|
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status->bValue[0] ? "pressed" : "released", len);
|
|
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uvc_input_report_key(dev, KEY_CAMERA, status->bValue[0]);
|
2008-07-01 01:04:50 +07:00
|
|
|
} else {
|
2017-10-18 00:15:54 +07:00
|
|
|
uvc_trace(UVC_TRACE_STATUS,
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|
|
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"Stream %u error event %02x len %d.\n",
|
2018-07-26 15:17:53 +07:00
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|
status->bOriginator, status->bEvent, len);
|
|
|
|
}
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|
}
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#define UVC_CTRL_VALUE_CHANGE 0
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#define UVC_CTRL_INFO_CHANGE 1
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#define UVC_CTRL_FAILURE_CHANGE 2
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#define UVC_CTRL_MIN_CHANGE 3
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|
|
#define UVC_CTRL_MAX_CHANGE 4
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static struct uvc_control *uvc_event_entity_find_ctrl(struct uvc_entity *entity,
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|
|
u8 selector)
|
|
|
|
{
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|
|
|
struct uvc_control *ctrl;
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|
|
unsigned int i;
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|
|
|
|
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|
|
for (i = 0, ctrl = entity->controls; i < entity->ncontrols; i++, ctrl++)
|
|
|
|
if (ctrl->info.selector == selector)
|
|
|
|
return ctrl;
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct uvc_control *uvc_event_find_ctrl(struct uvc_device *dev,
|
|
|
|
const struct uvc_control_status *status,
|
|
|
|
struct uvc_video_chain **chain)
|
|
|
|
{
|
|
|
|
list_for_each_entry((*chain), &dev->chains, list) {
|
|
|
|
struct uvc_entity *entity;
|
|
|
|
struct uvc_control *ctrl;
|
|
|
|
|
|
|
|
list_for_each_entry(entity, &(*chain)->entities, chain) {
|
|
|
|
if (entity->id != status->bOriginator)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
ctrl = uvc_event_entity_find_ctrl(entity,
|
|
|
|
status->bSelector);
|
|
|
|
if (ctrl)
|
|
|
|
return ctrl;
|
|
|
|
}
|
2008-07-01 01:04:50 +07:00
|
|
|
}
|
2018-07-26 15:17:53 +07:00
|
|
|
|
|
|
|
return NULL;
|
2008-07-01 01:04:50 +07:00
|
|
|
}
|
|
|
|
|
2018-07-26 15:17:53 +07:00
|
|
|
static bool uvc_event_control(struct urb *urb,
|
|
|
|
const struct uvc_control_status *status, int len)
|
2008-07-01 01:04:50 +07:00
|
|
|
{
|
2018-07-26 15:17:53 +07:00
|
|
|
static const char *attrs[] = { "value", "info", "failure", "min", "max" };
|
|
|
|
struct uvc_device *dev = urb->context;
|
|
|
|
struct uvc_video_chain *chain;
|
|
|
|
struct uvc_control *ctrl;
|
2008-07-01 01:04:50 +07:00
|
|
|
|
2018-07-26 15:17:53 +07:00
|
|
|
if (len < 6 || status->bEvent != 0 ||
|
|
|
|
status->bAttribute >= ARRAY_SIZE(attrs)) {
|
2008-07-01 01:04:50 +07:00
|
|
|
uvc_trace(UVC_TRACE_STATUS, "Invalid control status event "
|
|
|
|
"received.\n");
|
2018-07-26 15:17:53 +07:00
|
|
|
return false;
|
2008-07-01 01:04:50 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
uvc_trace(UVC_TRACE_STATUS, "Control %u/%u %s change len %d.\n",
|
2018-07-26 15:17:53 +07:00
|
|
|
status->bOriginator, status->bSelector,
|
|
|
|
attrs[status->bAttribute], len);
|
|
|
|
|
|
|
|
/* Find the control. */
|
|
|
|
ctrl = uvc_event_find_ctrl(dev, status, &chain);
|
|
|
|
if (!ctrl)
|
|
|
|
return false;
|
|
|
|
|
|
|
|
switch (status->bAttribute) {
|
|
|
|
case UVC_CTRL_VALUE_CHANGE:
|
|
|
|
return uvc_ctrl_status_event(urb, chain, ctrl, status->bValue);
|
|
|
|
|
|
|
|
case UVC_CTRL_INFO_CHANGE:
|
|
|
|
case UVC_CTRL_FAILURE_CHANGE:
|
|
|
|
case UVC_CTRL_MIN_CHANGE:
|
|
|
|
case UVC_CTRL_MAX_CHANGE:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return false;
|
2008-07-01 01:04:50 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void uvc_status_complete(struct urb *urb)
|
|
|
|
{
|
|
|
|
struct uvc_device *dev = urb->context;
|
|
|
|
int len, ret;
|
|
|
|
|
|
|
|
switch (urb->status) {
|
|
|
|
case 0:
|
|
|
|
break;
|
|
|
|
|
|
|
|
case -ENOENT: /* usb_kill_urb() called. */
|
|
|
|
case -ECONNRESET: /* usb_unlink_urb() called. */
|
|
|
|
case -ESHUTDOWN: /* The endpoint is being disabled. */
|
|
|
|
case -EPROTO: /* Device is disconnected (reported by some
|
|
|
|
* host controller). */
|
|
|
|
return;
|
|
|
|
|
|
|
|
default:
|
|
|
|
uvc_printk(KERN_WARNING, "Non-zero status (%d) in status "
|
|
|
|
"completion handler.\n", urb->status);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
len = urb->actual_length;
|
|
|
|
if (len > 0) {
|
|
|
|
switch (dev->status[0] & 0x0f) {
|
2018-07-26 15:17:53 +07:00
|
|
|
case UVC_STATUS_TYPE_CONTROL: {
|
|
|
|
struct uvc_control_status *status =
|
|
|
|
(struct uvc_control_status *)dev->status;
|
|
|
|
|
|
|
|
if (uvc_event_control(urb, status, len))
|
|
|
|
/* The URB will be resubmitted in work context. */
|
|
|
|
return;
|
2008-07-01 01:04:50 +07:00
|
|
|
break;
|
2018-07-26 15:17:53 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
case UVC_STATUS_TYPE_STREAMING: {
|
|
|
|
struct uvc_streaming_status *status =
|
|
|
|
(struct uvc_streaming_status *)dev->status;
|
2008-07-01 01:04:50 +07:00
|
|
|
|
2018-07-26 15:17:53 +07:00
|
|
|
uvc_event_streaming(dev, status, len);
|
2008-07-01 01:04:50 +07:00
|
|
|
break;
|
2018-07-26 15:17:53 +07:00
|
|
|
}
|
2008-07-01 01:04:50 +07:00
|
|
|
|
|
|
|
default:
|
2009-08-02 04:14:24 +07:00
|
|
|
uvc_trace(UVC_TRACE_STATUS, "Unknown status event "
|
|
|
|
"type %u.\n", dev->status[0]);
|
2008-07-01 01:04:50 +07:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Resubmit the URB. */
|
|
|
|
urb->interval = dev->int_ep->desc.bInterval;
|
|
|
|
if ((ret = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
|
|
|
|
uvc_printk(KERN_ERR, "Failed to resubmit status URB (%d).\n",
|
|
|
|
ret);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
int uvc_status_init(struct uvc_device *dev)
|
|
|
|
{
|
|
|
|
struct usb_host_endpoint *ep = dev->int_ep;
|
|
|
|
unsigned int pipe;
|
|
|
|
int interval;
|
|
|
|
|
|
|
|
if (ep == NULL)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
uvc_input_init(dev);
|
|
|
|
|
2008-09-16 13:32:20 +07:00
|
|
|
dev->status = kzalloc(UVC_MAX_STATUS_SIZE, GFP_KERNEL);
|
|
|
|
if (dev->status == NULL)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
2008-07-01 01:04:50 +07:00
|
|
|
dev->int_urb = usb_alloc_urb(0, GFP_KERNEL);
|
2008-09-16 13:32:20 +07:00
|
|
|
if (dev->int_urb == NULL) {
|
|
|
|
kfree(dev->status);
|
2008-07-01 01:04:50 +07:00
|
|
|
return -ENOMEM;
|
2008-09-16 13:32:20 +07:00
|
|
|
}
|
2008-07-01 01:04:50 +07:00
|
|
|
|
|
|
|
pipe = usb_rcvintpipe(dev->udev, ep->desc.bEndpointAddress);
|
|
|
|
|
|
|
|
/* For high-speed interrupt endpoints, the bInterval value is used as
|
|
|
|
* an exponent of two. Some developers forgot about it.
|
|
|
|
*/
|
|
|
|
interval = ep->desc.bInterval;
|
|
|
|
if (interval > 16 && dev->udev->speed == USB_SPEED_HIGH &&
|
|
|
|
(dev->quirks & UVC_QUIRK_STATUS_INTERVAL))
|
|
|
|
interval = fls(interval) - 1;
|
|
|
|
|
|
|
|
usb_fill_int_urb(dev->int_urb, dev->udev, pipe,
|
2008-09-16 13:32:20 +07:00
|
|
|
dev->status, UVC_MAX_STATUS_SIZE, uvc_status_complete,
|
2008-07-01 01:04:50 +07:00
|
|
|
dev, interval);
|
|
|
|
|
2009-05-19 20:08:03 +07:00
|
|
|
return 0;
|
2008-07-01 01:04:50 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
void uvc_status_cleanup(struct uvc_device *dev)
|
|
|
|
{
|
|
|
|
usb_kill_urb(dev->int_urb);
|
|
|
|
usb_free_urb(dev->int_urb);
|
2008-09-16 13:32:20 +07:00
|
|
|
kfree(dev->status);
|
2008-07-01 01:04:50 +07:00
|
|
|
uvc_input_cleanup(dev);
|
|
|
|
}
|
|
|
|
|
2013-04-26 08:28:51 +07:00
|
|
|
int uvc_status_start(struct uvc_device *dev, gfp_t flags)
|
2009-05-19 20:08:03 +07:00
|
|
|
{
|
|
|
|
if (dev->int_urb == NULL)
|
|
|
|
return 0;
|
|
|
|
|
2013-04-26 08:28:51 +07:00
|
|
|
return usb_submit_urb(dev->int_urb, flags);
|
2009-05-19 20:08:03 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
void uvc_status_stop(struct uvc_device *dev)
|
2008-07-01 01:04:50 +07:00
|
|
|
{
|
|
|
|
usb_kill_urb(dev->int_urb);
|
2009-05-19 20:08:03 +07:00
|
|
|
}
|