- 根目录:
- drivers
- staging
- easycap
- easycap_main.c
C++程序
|
4442行
|
128.93 KB
/******************************************************************************
* *
* easycap_main.c *
* *
* Video driver for EasyCAP USB2.0 Video Capture Device DC60 *
* *
* *
******************************************************************************/
/*
*
* Copyright (C) 2010 R.M. Thomas <rmthomas@sciolus.org>
*
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* The software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/*****************************************************************************/
#include "easycap.h"
#include <linux/usb/audio.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("R.M. Thomas <rmthomas@sciolus.org>");
MODULE_DESCRIPTION(EASYCAP_DRIVER_DESCRIPTION);
MODULE_VERSION(EASYCAP_DRIVER_VERSION);
#ifdef CONFIG_EASYCAP_DEBUG
int easycap_debug;
module_param_named(debug, easycap_debug, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug level: 0(default),1,2,...,9");
#endif /* CONFIG_EASYCAP_DEBUG */
bool easycap_readback;
module_param_named(readback, easycap_readback, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(readback, "read back written registers: (default false)");
static int easycap_bars = 1;
module_param_named(bars, easycap_bars, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(bars,
"Testcard bars on input signal failure: 0=>no, 1=>yes(default)");
static int easycap_gain = 16;
module_param_named(gain, easycap_gain, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(gain, "Audio gain: 0,...,16(default),...31");
static bool easycap_ntsc;
module_param_named(ntsc, easycap_ntsc, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(ntsc, "NTCS default encoding (default PAL)");
struct easycap_dongle easycapdc60_dongle[DONGLE_MANY];
static struct mutex mutex_dongle;
static void easycap_complete(struct urb *purb);
static int reset(struct easycap *peasycap);
const char *strerror(int err)
{
#define ERRNOSTR(_e) case _e: return # _e
switch (err) {
case 0: return "OK";
ERRNOSTR(ENOMEM);
ERRNOSTR(ENODEV);
ERRNOSTR(ENXIO);
ERRNOSTR(EINVAL);
ERRNOSTR(EAGAIN);
ERRNOSTR(EFBIG);
ERRNOSTR(EPIPE);
ERRNOSTR(EMSGSIZE);
ERRNOSTR(ENOSPC);
ERRNOSTR(EINPROGRESS);
ERRNOSTR(ENOSR);
ERRNOSTR(EOVERFLOW);
ERRNOSTR(EPROTO);
ERRNOSTR(EILSEQ);
ERRNOSTR(ETIMEDOUT);
ERRNOSTR(EOPNOTSUPP);
ERRNOSTR(EPFNOSUPPORT);
ERRNOSTR(EAFNOSUPPORT);
ERRNOSTR(EADDRINUSE);
ERRNOSTR(EADDRNOTAVAIL);
ERRNOSTR(ENOBUFS);
ERRNOSTR(EISCONN);
ERRNOSTR(ENOTCONN);
ERRNOSTR(ESHUTDOWN);
ERRNOSTR(ENOENT);
ERRNOSTR(ECONNRESET);
ERRNOSTR(ETIME);
ERRNOSTR(ECOMM);
ERRNOSTR(EREMOTEIO);
ERRNOSTR(EXDEV);
ERRNOSTR(EPERM);
default: return "unknown";
}
#undef ERRNOSTR
}
/*---------------------------------------------------------------------------*/
/*
* PARAMETERS USED WHEN REGISTERING THE VIDEO INTERFACE
*
* NOTE: SOME KERNELS IGNORE usb_class_driver.minor_base, AS MENTIONED BY
* CORBET ET AL. "LINUX DEVICE DRIVERS", 3rd EDITION, PAGE 253.
* THIS IS THE CASE FOR OpenSUSE.
*/
/*---------------------------------------------------------------------------*/
/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
/****************************************************************************/
/*---------------------------------------------------------------------------*/
/*
* THIS ROUTINE DOES NOT DETECT DUPLICATE OCCURRENCES OF POINTER peasycap
*/
/*---------------------------------------------------------------------------*/
int isdongle(struct easycap *peasycap)
{
int k;
if (!peasycap)
return -2;
for (k = 0; k < DONGLE_MANY; k++) {
if (easycapdc60_dongle[k].peasycap == peasycap) {
peasycap->isdongle = k;
return k;
}
}
return -1;
}
/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
static int easycap_open(struct inode *inode, struct file *file)
{
struct video_device *pvideo_device;
struct easycap *peasycap;
int rc;
JOT(4, "\n");
SAY("==========OPEN=========\n");
pvideo_device = video_devdata(file);
if (!pvideo_device) {
SAY("ERROR: pvideo_device is NULL.\n");
return -EFAULT;
}
peasycap = (struct easycap *)video_get_drvdata(pvideo_device);
if (!peasycap) {
SAY("ERROR: peasycap is NULL\n");
return -EFAULT;
}
if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
SAY("ERROR: bad peasycap: %p\n", peasycap);
return -EFAULT;
}
if (!peasycap->pusb_device) {
SAM("ERROR: peasycap->pusb_device is NULL\n");
return -EFAULT;
} else {
JOM(16, "peasycap->pusb_device=%p\n", peasycap->pusb_device);
}
file->private_data = peasycap;
rc = wakeup_device(peasycap->pusb_device);
if (0 == rc)
JOM(8, "wakeup_device() OK\n");
else {
SAM("ERROR: wakeup_device() rc = %i\n", rc);
if (-ENODEV == rc)
SAM("ERROR: wakeup_device() returned -ENODEV\n");
else
SAM("ERROR: wakeup_device() rc = %i\n", rc);
return rc;
}
peasycap->input = 0;
rc = reset(peasycap);
if (rc) {
SAM("ERROR: reset() rc = %i\n", rc);
return -EFAULT;
}
return 0;
}
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
/*
* RESET THE HARDWARE TO ITS REFERENCE STATE.
*
* THIS ROUTINE MAY BE CALLED REPEATEDLY IF easycap_complete() DETECTS
* A BAD VIDEO FRAME SIZE.
*/
/*---------------------------------------------------------------------------*/
static int reset(struct easycap *peasycap)
{
struct easycap_standard const *peasycap_standard;
int fmtidx, input, rate;
bool ntsc, other;
int rc;
if (!peasycap) {
SAY("ERROR: peasycap is NULL\n");
return -EFAULT;
}
input = peasycap->input;
/*---------------------------------------------------------------------------*/
/*
* IF THE SAA7113H HAS ALREADY ACQUIRED SYNC, USE ITS HARDWARE-DETECTED
* FIELD FREQUENCY TO DISTINGUISH NTSC FROM PAL. THIS IS ESSENTIAL FOR
* gstreamer AND OTHER USERSPACE PROGRAMS WHICH MAY NOT ATTEMPT TO INITIATE
* A SWITCH BETWEEN PAL AND NTSC.
*
* FUNCTION ready_saa() MAY REQUIRE A SUBSTANTIAL FRACTION OF A SECOND TO
* COMPLETE, SO SHOULD NOT BE INVOKED WITHOUT GOOD REASON.
*/
/*---------------------------------------------------------------------------*/
other = false;
JOM(8, "peasycap->ntsc=%d\n", peasycap->ntsc);
rate = ready_saa(peasycap->pusb_device);
if (rate < 0) {
JOM(8, "not ready to capture after %i ms ...\n", PATIENCE);
ntsc = !peasycap->ntsc;
JOM(8, "... trying %s ..\n", ntsc ? "NTSC" : "PAL");
rc = setup_stk(peasycap->pusb_device, ntsc);
if (rc) {
SAM("ERROR: setup_stk() rc = %i\n", rc);
return -EFAULT;
}
rc = setup_saa(peasycap->pusb_device, ntsc);
if (rc) {
SAM("ERROR: setup_saa() rc = %i\n", rc);
return -EFAULT;
}
rate = ready_saa(peasycap->pusb_device);
if (rate < 0) {
JOM(8, "not ready to capture after %i ms\n", PATIENCE);
JOM(8, "... saa register 0x1F has 0x%02X\n",
read_saa(peasycap->pusb_device, 0x1F));
ntsc = peasycap->ntsc;
} else {
JOM(8, "... success at second try: %i=rate\n", rate);
ntsc = (0 < (rate/2)) ? true : false ;
other = true;
}
} else {
JOM(8, "... success at first try: %i=rate\n", rate);
ntsc = (0 < rate/2) ? true : false ;
}
JOM(8, "ntsc=%d\n", ntsc);
/*---------------------------------------------------------------------------*/
rc = setup_stk(peasycap->pusb_device, ntsc);
if (rc) {
SAM("ERROR: setup_stk() rc = %i\n", rc);
return -EFAULT;
}
rc = setup_saa(peasycap->pusb_device, ntsc);
if (rc) {
SAM("ERROR: setup_saa() rc = %i\n", rc);
return -EFAULT;
}
memset(peasycap->merit, 0, sizeof(peasycap->merit));
peasycap->video_eof = 0;
peasycap->audio_eof = 0;
do_gettimeofday(&peasycap->timeval7);
/*---------------------------------------------------------------------------*/
/*
* RESTORE INPUT AND FORCE REFRESH OF STANDARD, FORMAT, ETC.
*
* WHILE THIS PROCEDURE IS IN PROGRESS, SOME IOCTL COMMANDS WILL RETURN -EBUSY.
*/
/*---------------------------------------------------------------------------*/
peasycap->input = -8192;
peasycap->standard_offset = -8192;
fmtidx = ntsc ? NTSC_M : PAL_BGHIN;
if (other) {
peasycap_standard = &easycap_standard[0];
while (0xFFFF != peasycap_standard->mask) {
if (fmtidx == peasycap_standard->v4l2_standard.index) {
peasycap->inputset[input].standard_offset =
peasycap_standard - easycap_standard;
break;
}
peasycap_standard++;
}
if (0xFFFF == peasycap_standard->mask) {
SAM("ERROR: standard not found\n");
return -EINVAL;
}
JOM(8, "%i=peasycap->inputset[%i].standard_offset\n",
peasycap->inputset[input].standard_offset, input);
}
peasycap->format_offset = -8192;
peasycap->brightness = -8192;
peasycap->contrast = -8192;
peasycap->saturation = -8192;
peasycap->hue = -8192;
rc = newinput(peasycap, input);
if (rc) {
SAM("ERROR: newinput(.,%i) rc = %i\n", rc, input);
return -EFAULT;
}
JOM(4, "restored input, standard and format\n");
JOM(8, "true=peasycap->ntsc %d\n", peasycap->ntsc);
if (0 > peasycap->input) {
SAM("MISTAKE: %i=peasycap->input\n", peasycap->input);
return -ENOENT;
}
if (0 > peasycap->standard_offset) {
SAM("MISTAKE: %i=peasycap->standard_offset\n",
peasycap->standard_offset);
return -ENOENT;
}
if (0 > peasycap->format_offset) {
SAM("MISTAKE: %i=peasycap->format_offset\n",
peasycap->format_offset);
return -ENOENT;
}
if (0 > peasycap->brightness) {
SAM("MISTAKE: %i=peasycap->brightness\n",
peasycap->brightness);
return -ENOENT;
}
if (0 > peasycap->contrast) {
SAM("MISTAKE: %i=peasycap->contrast\n", peasycap->contrast);
return -ENOENT;
}
if (0 > peasycap->saturation) {
SAM("MISTAKE: %i=peasycap->saturation\n",
peasycap->saturation);
return -ENOENT;
}
if (0 > peasycap->hue) {
SAM("MISTAKE: %i=peasycap->hue\n", peasycap->hue);
return -ENOENT;
}
return 0;
}
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
/*
* IF THE REQUESTED INPUT IS THE SAME AS THE EXISTING INPUT, DO NOTHING.
* OTHERWISE:
* KILL URBS, CLEAR FIELD AND FRAME BUFFERS AND RESET THEIR
* _read AND _fill POINTERS.
* SELECT THE NEW INPUT.
* ADJUST THE STANDARD, FORMAT, BRIGHTNESS, CONTRAST, SATURATION AND HUE
* ON THE BASIS OF INFORMATION IN STRUCTURE easycap.inputset[input].
* RESUBMIT THE URBS IF STREAMING WAS ALREADY IN PROGRESS.
*
* NOTE:
* THIS ROUTINE MAY BE CALLED FREQUENTLY BY ZONEMINDER VIA IOCTL,
* SO IT SHOULD WRITE ONLY SPARINGLY TO THE LOGFILE.
*/
/*---------------------------------------------------------------------------*/
int
newinput(struct easycap *peasycap, int input)
{
int rc, k, m, mood, off;
int inputnow, video_idlenow, audio_idlenow;
bool resubmit;
if (!peasycap) {
SAY("ERROR: peasycap is NULL\n");
return -EFAULT;
}
JOM(8, "%i=input sought\n", input);
if (0 > input && INPUT_MANY <= input)
return -ENOENT;
inputnow = peasycap->input;
if (input == inputnow)
return 0;
/*---------------------------------------------------------------------------*/
/*
* IF STREAMING IS IN PROGRESS THE URBS ARE KILLED AT THIS
* STAGE AND WILL BE RESUBMITTED PRIOR TO EXIT FROM THE ROUTINE.
* IF NO STREAMING IS IN PROGRESS NO URBS WILL BE SUBMITTED BY THE
* ROUTINE.
*/
/*---------------------------------------------------------------------------*/
video_idlenow = peasycap->video_idle;
audio_idlenow = peasycap->audio_idle;
peasycap->video_idle = 1;
peasycap->audio_idle = 1;
if (peasycap->video_isoc_streaming) {
resubmit = true;
kill_video_urbs(peasycap);
} else {
resubmit = false;
}
/*---------------------------------------------------------------------------*/
if (!peasycap->pusb_device) {
SAM("ERROR: peasycap->pusb_device is NULL\n");
return -ENODEV;
}
rc = usb_set_interface(peasycap->pusb_device,
peasycap->video_interface,
peasycap->video_altsetting_off);
if (rc) {
SAM("ERROR: usb_set_interface() rc = %i\n", rc);
return -EFAULT;
}
rc = stop_100(peasycap->pusb_device);
if (rc) {
SAM("ERROR: stop_100() rc = %i\n", rc);
return -EFAULT;
}
for (k = 0; k < FIELD_BUFFER_MANY; k++) {
for (m = 0; m < FIELD_BUFFER_SIZE/PAGE_SIZE; m++)
memset(peasycap->field_buffer[k][m].pgo, 0, PAGE_SIZE);
}
for (k = 0; k < FRAME_BUFFER_MANY; k++) {
for (m = 0; m < FRAME_BUFFER_SIZE/PAGE_SIZE; m++)
memset(peasycap->frame_buffer[k][m].pgo, 0, PAGE_SIZE);
}
peasycap->field_page = 0;
peasycap->field_read = 0;
peasycap->field_fill = 0;
peasycap->frame_read = 0;
peasycap->frame_fill = 0;
for (k = 0; k < peasycap->input; k++) {
(peasycap->frame_fill)++;
if (peasycap->frame_buffer_many <= peasycap->frame_fill)
peasycap->frame_fill = 0;
}
peasycap->input = input;
select_input(peasycap->pusb_device, peasycap->input, 9);
/*---------------------------------------------------------------------------*/
if (input == peasycap->inputset[input].input) {
off = peasycap->inputset[input].standard_offset;
if (off != peasycap->standard_offset) {
rc = adjust_standard(peasycap,
easycap_standard[off].v4l2_standard.id);
if (rc) {
SAM("ERROR: adjust_standard() rc = %i\n", rc);
return -EFAULT;
}
JOM(8, "%i=peasycap->standard_offset\n",
peasycap->standard_offset);
} else {
JOM(8, "%i=peasycap->standard_offset unchanged\n",
peasycap->standard_offset);
}
off = peasycap->inputset[input].format_offset;
if (off != peasycap->format_offset) {
struct v4l2_pix_format *pix =
&easycap_format[off].v4l2_format.fmt.pix;
rc = adjust_format(peasycap,
pix->width, pix->height,
pix->pixelformat, pix->field, false);
if (0 > rc) {
SAM("ERROR: adjust_format() rc = %i\n", rc);
return -EFAULT;
}
JOM(8, "%i=peasycap->format_offset\n",
peasycap->format_offset);
} else {
JOM(8, "%i=peasycap->format_offset unchanged\n",
peasycap->format_offset);
}
mood = peasycap->inputset[input].brightness;
if (mood != peasycap->brightness) {
rc = adjust_brightness(peasycap, mood);
if (rc) {
SAM("ERROR: adjust_brightness rc = %i\n", rc);
return -EFAULT;
}
JOM(8, "%i=peasycap->brightness\n",
peasycap->brightness);
}
mood = peasycap->inputset[input].contrast;
if (mood != peasycap->contrast) {
rc = adjust_contrast(peasycap, mood);
if (rc) {
SAM("ERROR: adjust_contrast rc = %i\n", rc);
return -EFAULT;
}
JOM(8, "%i=peasycap->contrast\n", peasycap->contrast);
}
mood = peasycap->inputset[input].saturation;
if (mood != peasycap->saturation) {
rc = adjust_saturation(peasycap, mood);
if (rc) {
SAM("ERROR: adjust_saturation rc = %i\n", rc);
return -EFAULT;
}
JOM(8, "%i=peasycap->saturation\n",
peasycap->saturation);
}
mood = peasycap->inputset[input].hue;
if (mood != peasycap->hue) {
rc = adjust_hue(peasycap, mood);
if (rc) {
SAM("ERROR: adjust_hue rc = %i\n", rc);
return -EFAULT;
}
JOM(8, "%i=peasycap->hue\n", peasycap->hue);
}
} else {
SAM("MISTAKE: easycap.inputset[%i] unpopulated\n", input);
return -ENOENT;
}
/*---------------------------------------------------------------------------*/
if (!peasycap->pusb_device) {
SAM("ERROR: peasycap->pusb_device is NULL\n");
return -ENODEV;
}
rc = usb_set_interface(peasycap->pusb_device,
peasycap->video_interface,
peasycap->video_altsetting_on);
if (rc) {
SAM("ERROR: usb_set_interface() rc = %i\n", rc);
return -EFAULT;
}
rc = start_100(peasycap->pusb_device);
if (rc) {
SAM("ERROR: start_100() rc = %i\n", rc);
return -EFAULT;
}
if (resubmit)
submit_video_urbs(peasycap);
peasycap->video_isoc_sequence = VIDEO_ISOC_BUFFER_MANY - 1;
peasycap->video_idle = video_idlenow;
peasycap->audio_idle = audio_idlenow;
peasycap->video_junk = 0;
return 0;
}
/*****************************************************************************/
int submit_video_urbs(struct easycap *peasycap)
{
struct data_urb *pdata_urb;
struct urb *purb;
struct list_head *plist_head;
int j, isbad, nospc, m, rc;
int isbuf;
if (!peasycap) {
SAY("ERROR: peasycap is NULL\n");
return -EFAULT;
}
if (!peasycap->purb_video_head) {
SAY("ERROR: peasycap->urb_video_head uninitialized\n");
return -EFAULT;
}
if (!peasycap->pusb_device) {
SAY("ERROR: peasycap->pusb_device is NULL\n");
return -ENODEV;
}
if (!peasycap->video_isoc_streaming) {
JOM(4, "submission of all video urbs\n");
isbad = 0; nospc = 0; m = 0;
list_for_each(plist_head, (peasycap->purb_video_head)) {
pdata_urb = list_entry(plist_head,
struct data_urb, list_head);
if (pdata_urb && pdata_urb->purb) {
purb = pdata_urb->purb;
isbuf = pdata_urb->isbuf;
purb->interval = 1;
purb->dev = peasycap->pusb_device;
purb->pipe =
usb_rcvisocpipe(peasycap->pusb_device,
peasycap->video_endpointnumber);
purb->transfer_flags = URB_ISO_ASAP;
purb->transfer_buffer =
peasycap->video_isoc_buffer[isbuf].pgo;
purb->transfer_buffer_length =
peasycap->video_isoc_buffer_size;
purb->complete = easycap_complete;
purb->context = peasycap;
purb->start_frame = 0;
purb->number_of_packets =
peasycap->video_isoc_framesperdesc;
for (j = 0; j < peasycap->video_isoc_framesperdesc; j++) {
purb->iso_frame_desc[j]. offset =
j * peasycap->video_isoc_maxframesize;
purb->iso_frame_desc[j]. length =
peasycap->video_isoc_maxframesize;
}
rc = usb_submit_urb(purb, GFP_KERNEL);
if (rc) {
isbad++;
SAM("ERROR: usb_submit_urb() failed "
"for urb with rc:-%s\n",
strerror(rc));
if (rc == -ENOSPC)
nospc++;
} else {
m++;
}
} else {
isbad++;
}
}
if (nospc) {
SAM("-ENOSPC=usb_submit_urb() for %i urbs\n", nospc);
SAM("..... possibly inadequate USB bandwidth\n");
peasycap->video_eof = 1;
}
if (isbad) {
JOM(4, "attempting cleanup instead of submitting\n");
list_for_each(plist_head, (peasycap->purb_video_head)) {
pdata_urb = list_entry(plist_head,
struct data_urb, list_head);
if (pdata_urb) {
purb = pdata_urb->purb;
if (purb)
usb_kill_urb(purb);
}
}
peasycap->video_isoc_streaming = 0;
} else {
peasycap->video_isoc_streaming = 1;
JOM(4, "submitted %i video urbs\n", m);
}
} else {
JOM(4, "already streaming video urbs\n");
}
return 0;
}
/*****************************************************************************/
int kill_video_urbs(struct easycap *peasycap)
{
int m;
struct list_head *plist_head;
struct data_urb *pdata_urb;
if (!peasycap) {
SAY("ERROR: peasycap is NULL\n");
return -EFAULT;
}
if (!peasycap->video_isoc_streaming) {
JOM(8, "%i=video_isoc_streaming, no video urbs killed\n",
peasycap->video_isoc_streaming);
return 0;
}
if (!peasycap->purb_video_head) {
SAM("ERROR: peasycap->purb_video_head is NULL\n");
return -EFAULT;
}
peasycap->video_isoc_streaming = 0;
JOM(4, "killing video urbs\n");
m = 0;
list_for_each(plist_head, (peasycap->purb_video_head)) {
pdata_urb = list_entry(plist_head, struct data_urb, list_head);
if (pdata_urb && pdata_urb->purb) {
usb_kill_urb(pdata_urb->purb);
m++;
}
}
JOM(4, "%i video urbs killed\n", m);
return 0;
}
/****************************************************************************/
/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
/*--------------------------------------------------------------------------*/
static int easycap_open_noinode(struct file *file)
{
return easycap_open(NULL, file);
}
static int videodev_release(struct video_device *pvideo_device)
{
struct easycap *peasycap;
peasycap = video_get_drvdata(pvideo_device);
if (!peasycap) {
SAY("ERROR: peasycap is NULL\n");
SAY("ending unsuccessfully\n");
return -EFAULT;
}
if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
SAY("ERROR: bad peasycap: %p\n", peasycap);
return -EFAULT;
}
if (0 != kill_video_urbs(peasycap)) {
SAM("ERROR: kill_video_urbs() failed\n");
return -EFAULT;
}
JOM(4, "ending successfully\n");
return 0;
}
/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
/*****************************************************************************/
/*--------------------------------------------------------------------------*/
/*
* THIS FUNCTION IS CALLED FROM WITHIN easycap_usb_disconnect() AND IS
* PROTECTED BY SEMAPHORES SET AND CLEARED BY easycap_usb_disconnect().
*
* BY THIS STAGE THE DEVICE HAS ALREADY BEEN PHYSICALLY UNPLUGGED, SO
* peasycap->pusb_device IS NO LONGER VALID.
*/
/*---------------------------------------------------------------------------*/
static void easycap_delete(struct kref *pkref)
{
struct easycap *peasycap;
struct data_urb *pdata_urb;
struct list_head *plist_head, *plist_next;
int k, m, gone, kd;
int allocation_video_urb;
int allocation_video_page;
int allocation_video_struct;
int allocation_audio_urb;
int allocation_audio_page;
int allocation_audio_struct;
int registered_video, registered_audio;
peasycap = container_of(pkref, struct easycap, kref);
if (!peasycap) {
SAM("ERROR: peasycap is NULL: cannot perform deletions\n");
return;
}
if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
SAY("ERROR: bad peasycap: %p\n", peasycap);
return;
}
kd = isdongle(peasycap);
/*---------------------------------------------------------------------------*/
/*
* FREE VIDEO.
*/
/*---------------------------------------------------------------------------*/
if (peasycap->purb_video_head) {
JOM(4, "freeing video urbs\n");
m = 0;
list_for_each(plist_head, (peasycap->purb_video_head)) {
pdata_urb = list_entry(plist_head,
struct data_urb, list_head);
if (!pdata_urb) {
JOM(4, "ERROR: pdata_urb is NULL\n");
} else {
if (pdata_urb->purb) {
usb_free_urb(pdata_urb->purb);
pdata_urb->purb = NULL;
peasycap->allocation_video_urb -= 1;
m++;
}
}
}
JOM(4, "%i video urbs freed\n", m);
/*---------------------------------------------------------------------------*/
JOM(4, "freeing video data_urb structures.\n");
m = 0;
list_for_each_safe(plist_head, plist_next,
peasycap->purb_video_head) {
pdata_urb = list_entry(plist_head,
struct data_urb, list_head);
if (pdata_urb) {
peasycap->allocation_video_struct -=
sizeof(struct data_urb);
kfree(pdata_urb);
pdata_urb = NULL;
m++;
}
}
JOM(4, "%i video data_urb structures freed\n", m);
JOM(4, "setting peasycap->purb_video_head=NULL\n");
peasycap->purb_video_head = NULL;
}
/*---------------------------------------------------------------------------*/
JOM(4, "freeing video isoc buffers.\n");
m = 0;
for (k = 0; k < VIDEO_ISOC_BUFFER_MANY; k++) {
if (peasycap->video_isoc_buffer[k].pgo) {
free_pages((unsigned long)
peasycap->video_isoc_buffer[k].pgo,
VIDEO_ISOC_ORDER);
peasycap->video_isoc_buffer[k].pgo = NULL;
peasycap->allocation_video_page -=
BIT(VIDEO_ISOC_ORDER);
m++;
}
}
JOM(4, "isoc video buffers freed: %i pages\n",
m * (0x01 << VIDEO_ISOC_ORDER));
/*---------------------------------------------------------------------------*/
JOM(4, "freeing video field buffers.\n");
gone = 0;
for (k = 0; k < FIELD_BUFFER_MANY; k++) {
for (m = 0; m < FIELD_BUFFER_SIZE/PAGE_SIZE; m++) {
if (peasycap->field_buffer[k][m].pgo) {
free_page((unsigned long)
peasycap->field_buffer[k][m].pgo);
peasycap->field_buffer[k][m].pgo = NULL;
peasycap->allocation_video_page -= 1;
gone++;
}
}
}
JOM(4, "video field buffers freed: %i pages\n", gone);
/*---------------------------------------------------------------------------*/
JOM(4, "freeing video frame buffers.\n");
gone = 0;
for (k = 0; k < FRAME_BUFFER_MANY; k++) {
for (m = 0; m < FRAME_BUFFER_SIZE/PAGE_SIZE; m++) {
if (peasycap->frame_buffer[k][m].pgo) {
free_page((unsigned long)
peasycap->frame_buffer[k][m].pgo);
peasycap->frame_buffer[k][m].pgo = NULL;
peasycap->allocation_video_page -= 1;
gone++;
}
}
}
JOM(4, "video frame buffers freed: %i pages\n", gone);
/*---------------------------------------------------------------------------*/
/*
* FREE AUDIO.
*/
/*---------------------------------------------------------------------------*/
if (peasycap->purb_audio_head) {
JOM(4, "freeing audio urbs\n");
m = 0;
list_for_each(plist_head, (peasycap->purb_audio_head)) {
pdata_urb = list_entry(plist_head,
struct data_urb, list_head);
if (!pdata_urb)
JOM(4, "ERROR: pdata_urb is NULL\n");
else {
if (pdata_urb->purb) {
usb_free_urb(pdata_urb->purb);
pdata_urb->purb = NULL;
peasycap->allocation_audio_urb -= 1;
m++;
}
}
}
JOM(4, "%i audio urbs freed\n", m);
/*---------------------------------------------------------------------------*/
JOM(4, "freeing audio data_urb structures.\n");
m = 0;
list_for_each_safe(plist_head, plist_next,
peasycap->purb_audio_head) {
pdata_urb = list_entry(plist_head,
struct data_urb, list_head);
if (pdata_urb) {
peasycap->allocation_audio_struct -=
sizeof(struct data_urb);
kfree(pdata_urb);
pdata_urb = NULL;
m++;
}
}
JOM(4, "%i audio data_urb structures freed\n", m);
JOM(4, "setting peasycap->purb_audio_head=NULL\n");
peasycap->purb_audio_head = NULL;
}
/*---------------------------------------------------------------------------*/
JOM(4, "freeing audio isoc buffers.\n");
m = 0;
for (k = 0; k < AUDIO_ISOC_BUFFER_MANY; k++) {
if (peasycap->audio_isoc_buffer[k].pgo) {
free_pages((unsigned long)
(peasycap->audio_isoc_buffer[k].pgo),
AUDIO_ISOC_ORDER);
peasycap->audio_isoc_buffer[k].pgo = NULL;
peasycap->allocation_audio_page -=
BIT(AUDIO_ISOC_ORDER);
m++;
}
}
JOM(4, "easyoss_delete(): isoc audio buffers freed: %i pages\n",
m * (0x01 << AUDIO_ISOC_ORDER));
/*---------------------------------------------------------------------------*/
#ifdef CONFIG_EASYCAP_OSS
JOM(4, "freeing audio buffers.\n");
gone = 0;
for (k = 0; k < peasycap->audio_buffer_page_many; k++) {
if (peasycap->audio_buffer[k].pgo) {
free_page((unsigned long)peasycap->audio_buffer[k].pgo);
peasycap->audio_buffer[k].pgo = NULL;
peasycap->allocation_audio_page -= 1;
gone++;
}
}
JOM(4, "easyoss_delete(): audio buffers freed: %i pages\n", gone);
#endif /* CONFIG_EASYCAP_OSS */
/*---------------------------------------------------------------------------*/
JOM(4, "freeing easycap structure.\n");
allocation_video_urb = peasycap->allocation_video_urb;
allocation_video_page = peasycap->allocation_video_page;
allocation_video_struct = peasycap->allocation_video_struct;
registered_video = peasycap->registered_video;
allocation_audio_urb = peasycap->allocation_audio_urb;
allocation_audio_page = peasycap->allocation_audio_page;
allocation_audio_struct = peasycap->allocation_audio_struct;
registered_audio = peasycap->registered_audio;
kfree(peasycap);
if (0 <= kd && DONGLE_MANY > kd) {
if (mutex_lock_interruptible(&mutex_dongle)) {
SAY("ERROR: cannot down mutex_dongle\n");
} else {
JOM(4, "locked mutex_dongle\n");
easycapdc60_dongle[kd].peasycap = NULL;
mutex_unlock(&mutex_dongle);
JOM(4, "unlocked mutex_dongle\n");
JOT(4, " null-->dongle[%i].peasycap\n", kd);
allocation_video_struct -= sizeof(struct easycap);
}
} else {
SAY("ERROR: cannot purge dongle[].peasycap");
}
/*---------------------------------------------------------------------------*/
SAY("%8i=video urbs after all deletions\n", allocation_video_urb);
SAY("%8i=video pages after all deletions\n", allocation_video_page);
SAY("%8i=video structs after all deletions\n", allocation_video_struct);
SAY("%8i=video devices after all deletions\n", registered_video);
SAY("%8i=audio urbs after all deletions\n", allocation_audio_urb);
SAY("%8i=audio pages after all deletions\n", allocation_audio_page);
SAY("%8i=audio structs after all deletions\n", allocation_audio_struct);
SAY("%8i=audio devices after all deletions\n", registered_audio);
JOT(4, "ending.\n");
return;
}
/*****************************************************************************/
static unsigned int easycap_poll(struct file *file, poll_table *wait)
{
struct easycap *peasycap;
int rc, kd;
JOT(8, "\n");
if (NULL == ((poll_table *)wait))
JOT(8, "WARNING: poll table pointer is NULL ... continuing\n");
if (!file) {
SAY("ERROR: file pointer is NULL\n");
return -ERESTARTSYS;
}
peasycap = file->private_data;
if (!peasycap) {
SAY("ERROR: peasycap is NULL\n");
return -EFAULT;
}
if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
SAY("ERROR: bad peasycap: %p\n", peasycap);
return -EFAULT;
}
if (!peasycap->pusb_device) {
SAY("ERROR: peasycap->pusb_device is NULL\n");
return -EFAULT;
}
/*---------------------------------------------------------------------------*/
kd = isdongle(peasycap);
if (0 <= kd && DONGLE_MANY > kd) {
if (mutex_lock_interruptible(&easycapdc60_dongle[kd].mutex_video)) {
SAY("ERROR: cannot down dongle[%i].mutex_video\n", kd);
return -ERESTARTSYS;
}
JOM(4, "locked dongle[%i].mutex_video\n", kd);
/*
* MEANWHILE, easycap_usb_disconnect() MAY HAVE FREED POINTER
* peasycap, IN WHICH CASE A REPEAT CALL TO isdongle() WILL FAIL.
* IF NECESSARY, BAIL OUT.
*/
if (kd != isdongle(peasycap))
return -ERESTARTSYS;
if (!file) {
SAY("ERROR: file is NULL\n");
mutex_unlock(&easycapdc60_dongle[kd].mutex_video);
return -ERESTARTSYS;
}
peasycap = file->private_data;
if (!peasycap) {
SAY("ERROR: peasycap is NULL\n");
mutex_unlock(&easycapdc60_dongle[kd].mutex_video);
return -ERESTARTSYS;
}
if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
SAY("ERROR: bad peasycap: %p\n", peasycap);
mutex_unlock(&easycapdc60_dongle[kd].mutex_video);
return -ERESTARTSYS;
}
if (!peasycap->pusb_device) {
SAM("ERROR: peasycap->pusb_device is NULL\n");
mutex_unlock(&easycapdc60_dongle[kd].mutex_video);
return -ERESTARTSYS;
}
} else
/*
* IF easycap_usb_disconnect() HAS ALREADY FREED POINTER peasycap
* BEFORE THE ATTEMPT TO ACQUIRE THE SEMAPHORE, isdongle() WILL
* HAVE FAILED. BAIL OUT.
*/
return -ERESTARTSYS;
/*---------------------------------------------------------------------------*/
rc = easycap_dqbuf(peasycap, 0);
peasycap->polled = 1;
mutex_unlock(&easycapdc60_dongle[kd].mutex_video);
if (0 == rc)
return POLLIN | POLLRDNORM;
else
return POLLERR;
}
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
/*
* IF mode IS NONZERO THIS ROUTINE RETURNS -EAGAIN RATHER THAN BLOCKING.
*/
/*---------------------------------------------------------------------------*/
int easycap_dqbuf(struct easycap *peasycap, int mode)
{
int input, ifield, miss, rc;
if (!peasycap) {
SAY("ERROR: peasycap is NULL\n");
return -EFAULT;
}
if (!peasycap->pusb_device) {
SAY("ERROR: peasycap->pusb_device is NULL\n");
return -EFAULT;
}
ifield = 0;
JOM(8, "%i=ifield\n", ifield);
/*---------------------------------------------------------------------------*/
/*
* CHECK FOR LOST INPUT SIGNAL.
*
* FOR THE FOUR-CVBS EasyCAP, THIS DOES NOT WORK AS EXPECTED.
* IF INPUT 0 IS PRESENT AND SYNC ACQUIRED, UNPLUGGING INPUT 4 DOES NOT
* RESULT IN SETTING BIT 0x40 ON REGISTER 0x1F, PRESUMABLY BECAUSE THERE
* IS FLYWHEELING ON INPUT 0. THE UPSHOT IS:
*
* INPUT 0 PLUGGED, INPUT 4 PLUGGED => SCREEN 0 OK, SCREEN 4 OK
* INPUT 0 PLUGGED, INPUT 4 UNPLUGGED => SCREEN 0 OK, SCREEN 4 BLACK
* INPUT 0 UNPLUGGED, INPUT 4 PLUGGED => SCREEN 0 BARS, SCREEN 4 OK
* INPUT 0 UNPLUGGED, INPUT 4 UNPLUGGED => SCREEN 0 BARS, SCREEN 4 BARS
*/
/*---------------------------------------------------------------------------*/
input = peasycap->input;
if (0 <= input && INPUT_MANY > input) {
rc = read_saa(peasycap->pusb_device, 0x1F);
if (0 <= rc) {
if (rc & 0x40)
peasycap->lost[input] += 1;
else
peasycap->lost[input] -= 2;
if (0 > peasycap->lost[input])
peasycap->lost[input] = 0;
else if ((2 * VIDEO_LOST_TOLERATE) < peasycap->lost[input])
peasycap->lost[input] = (2 * VIDEO_LOST_TOLERATE);
}
}
/*---------------------------------------------------------------------------*/
/*
* WAIT FOR FIELD ifield (0 => TOP, 1 => BOTTOM)
*/
/*---------------------------------------------------------------------------*/
miss = 0;
while ((peasycap->field_read == peasycap->field_fill) ||
(0 != (0xFF00 & peasycap->field_buffer
[peasycap->field_read][0].kount)) ||
(ifield != (0x00FF & peasycap->field_buffer
[peasycap->field_read][0].kount))) {
if (mode)
return -EAGAIN;
JOM(8, "first wait on wq_video, %i=field_read %i=field_fill\n",
peasycap->field_read, peasycap->field_fill);
if (0 != (wait_event_interruptible(peasycap->wq_video,
(peasycap->video_idle || peasycap->video_eof ||
((peasycap->field_read != peasycap->field_fill) &&
(0 == (0xFF00 & peasycap->field_buffer[peasycap->field_read][0].kount)) &&
(ifield == (0x00FF & peasycap->field_buffer[peasycap->field_read][0].kount))))))) {
SAM("aborted by signal\n");
return -EIO;
}
if (peasycap->video_idle) {
JOM(8, "%i=peasycap->video_idle returning -EAGAIN\n",
peasycap->video_idle);
return -EAGAIN;
}
if (peasycap->video_eof) {
JOM(8, "%i=peasycap->video_eof\n", peasycap->video_eof);
#if defined(PERSEVERE)
if (1 == peasycap->status) {
JOM(8, "persevering ...\n");
peasycap->video_eof = 0;
peasycap->audio_eof = 0;
if (0 != reset(peasycap)) {
JOM(8, " ... failed returning -EIO\n");
peasycap->video_eof = 1;
peasycap->audio_eof = 1;
kill_video_urbs(peasycap);
return -EIO;
}
peasycap->status = 0;
JOM(8, " ... OK returning -EAGAIN\n");
return -EAGAIN;
}
#endif /*PERSEVERE*/
peasycap->video_eof = 1;
peasycap->audio_eof = 1;
kill_video_urbs(peasycap);
JOM(8, "returning -EIO\n");
return -EIO;
}
miss++;
}
JOM(8, "first awakening on wq_video after %i waits\n", miss);
rc = field2frame(peasycap);
if (rc)
SAM("ERROR: field2frame() rc = %i\n", rc);
/*---------------------------------------------------------------------------*/
/*
* WAIT FOR THE OTHER FIELD
*/
/*---------------------------------------------------------------------------*/
if (ifield)
ifield = 0;
else
ifield = 1;
miss = 0;
while ((peasycap->field_read == peasycap->field_fill) ||
(0 != (0xFF00 & peasycap->field_buffer[peasycap->field_read][0].kount)) ||
(ifield != (0x00FF & peasycap->field_buffer[peasycap->field_read][0].kount))) {
if (mode)
return -EAGAIN;
JOM(8, "second wait on wq_video %i=field_read %i=field_fill\n",
peasycap->field_read, peasycap->field_fill);
if (0 != (wait_event_interruptible(peasycap->wq_video,
(peasycap->video_idle || peasycap->video_eof ||
((peasycap->field_read != peasycap->field_fill) &&
(0 == (0xFF00 & peasycap->field_buffer[peasycap->field_read][0].kount)) &&
(ifield == (0x00FF & peasycap->field_buffer[peasycap->field_read][0].kount))))))) {
SAM("aborted by signal\n");
return -EIO;
}
if (peasycap->video_idle) {
JOM(8, "%i=peasycap->video_idle returning -EAGAIN\n",
peasycap->video_idle);
return -EAGAIN;
}
if (peasycap->video_eof) {
JOM(8, "%i=peasycap->video_eof\n", peasycap->video_eof);
#if defined(PERSEVERE)
if (1 == peasycap->status) {
JOM(8, "persevering ...\n");
peasycap->video_eof = 0;
peasycap->audio_eof = 0;
if (0 != reset(peasycap)) {
JOM(8, " ... failed returning -EIO\n");
peasycap->video_eof = 1;
peasycap->audio_eof = 1;
kill_video_urbs(peasycap);
return -EIO;
}
peasycap->status = 0;
JOM(8, " ... OK ... returning -EAGAIN\n");
return -EAGAIN;
}
#endif /*PERSEVERE*/
peasycap->video_eof = 1;
peasycap->audio_eof = 1;
kill_video_urbs(peasycap);
JOM(8, "returning -EIO\n");
return -EIO;
}
miss++;
}
JOM(8, "second awakening on wq_video after %i waits\n", miss);
rc = field2frame(peasycap);
if (rc)
SAM("ERROR: field2frame() rc = %i\n", rc);
/*---------------------------------------------------------------------------*/
/*
* WASTE THIS FRAME
*/
/*---------------------------------------------------------------------------*/
if (peasycap->skip) {
peasycap->skipped++;
if (peasycap->skip != peasycap->skipped)
return peasycap->skip - peasycap->skipped;
else
peasycap->skipped = 0;
}
/*---------------------------------------------------------------------------*/
peasycap->frame_read = peasycap->frame_fill;
peasycap->queued[peasycap->frame_read] = 0;
peasycap->done[peasycap->frame_read] = V4L2_BUF_FLAG_DONE;
peasycap->frame_fill++;
if (peasycap->frame_buffer_many <= peasycap->frame_fill)
peasycap->frame_fill = 0;
if (0x01 & easycap_standard[peasycap->standard_offset].mask)
peasycap->frame_buffer[peasycap->frame_read][0].kount =
V4L2_FIELD_TOP;
else
peasycap->frame_buffer[peasycap->frame_read][0].kount =
V4L2_FIELD_BOTTOM;
JOM(8, "setting: %i=peasycap->frame_read\n", peasycap->frame_read);
JOM(8, "bumped to: %i=peasycap->frame_fill\n", peasycap->frame_fill);
return 0;
}
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
/*
* BY DEFINITION, odd IS true FOR THE FIELD OCCUPYING LINES 1,3,5,...,479
* odd IS false FOR THE FIELD OCCUPYING LINES 0,2,4,...,478
*
* WHEN BOOLEAN PARAMETER decimatepixel IS true, ONLY THE FIELD FOR WHICH
* odd==false IS TRANSFERRED TO THE FRAME BUFFER.
*
* THE BOOLEAN PARAMETER offerfields IS true ONLY WHEN THE USER PROGRAM
* CHOOSES THE OPTION V4L2_FIELD_INTERLACED.
*/
/*---------------------------------------------------------------------------*/
int
field2frame(struct easycap *peasycap)
{
struct timeval timeval;
long long int above, below;
u32 remainder;
struct signed_div_result sdr;
void *pex, *pad;
int kex, kad, mex, mad, rex, rad, rad2;
int c2, c3, w2, w3, cz, wz;
int rc, bytesperpixel, multiplier;
int much, more, over, rump, caches, input;
u8 mask, margin;
bool odd, isuy, decimatepixel, offerfields, badinput;
if (!peasycap) {
SAY("ERROR: peasycap is NULL\n");
return -EFAULT;
}
badinput = false;
input = 0x07 & peasycap->field_buffer[peasycap->field_read][0].input;
JOM(8, "===== parity %i, input 0x%02X, field buffer %i --> "
"frame buffer %i\n",
peasycap->field_buffer[peasycap->field_read][0].kount,
peasycap->field_buffer[peasycap->field_read][0].input,
peasycap->field_read, peasycap->frame_fill);
JOM(8, "===== %i=bytesperpixel\n", peasycap->bytesperpixel);
if (peasycap->offerfields)
JOM(8, "===== offerfields\n");
/*---------------------------------------------------------------------------*/
/*
* REJECT OR CLEAN BAD FIELDS
*/
/*---------------------------------------------------------------------------*/
if (peasycap->field_read == peasycap->field_fill) {
SAM("ERROR: on entry, still filling field buffer %i\n",
peasycap->field_read);
return 0;
}
#ifdef EASYCAP_TESTCARD
easycap_testcard(peasycap, peasycap->field_read);
#else
if (0 <= input && INPUT_MANY > input) {
if (easycap_bars && VIDEO_LOST_TOLERATE <= peasycap->lost[input])
easycap_testcard(peasycap, peasycap->field_read);
}
#endif /*EASYCAP_TESTCARD*/
/*---------------------------------------------------------------------------*/
offerfields = peasycap->offerfields;
bytesperpixel = peasycap->bytesperpixel;
decimatepixel = peasycap->decimatepixel;
if ((2 != bytesperpixel) &&
(3 != bytesperpixel) &&
(4 != bytesperpixel)) {
SAM("MISTAKE: %i=bytesperpixel\n", bytesperpixel);
return -EFAULT;
}
if (decimatepixel)
multiplier = 2;
else
multiplier = 1;
w2 = 2 * multiplier * (peasycap->width);
w3 = bytesperpixel * multiplier * (peasycap->width);
wz = multiplier * (peasycap->height) *
multiplier * (peasycap->width);
kex = peasycap->field_read; mex = 0;
kad = peasycap->frame_fill; mad = 0;
pex = peasycap->field_buffer[kex][0].pgo; rex = PAGE_SIZE;
pad = peasycap->frame_buffer[kad][0].pgo; rad = PAGE_SIZE;
odd = !!(peasycap->field_buffer[kex][0].kount);
if (odd && (!decimatepixel)) {
JOM(8, "initial skipping %4i bytes p.%4i\n",
w3/multiplier, mad);
pad += (w3 / multiplier); rad -= (w3 / multiplier);
}
isuy = true;
mask = 0; rump = 0; caches = 0;
cz = 0;
while (cz < wz) {
/*
* PROCESS ONE LINE OF FRAME AT FULL RESOLUTION:
* READ w2 BYTES FROM FIELD BUFFER,
* WRITE w3 BYTES TO FRAME BUFFER
*/
if (!decimatepixel) {
over = w2;
do {
much = over; more = 0;
margin = 0; mask = 0x00;
if (rex < much)
much = rex;
rump = 0;
if (much % 2) {
SAM("MISTAKE: much is odd\n");
return -EFAULT;
}
more = (bytesperpixel *
much) / 2;
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
if (1 < bytesperpixel) {
if (rad * 2 < much * bytesperpixel) {
/*
* INJUDICIOUS ALTERATION OF
* THIS STATEMENT BLOCK WILL
* CAUSE BREAKAGE. BEWARE.
*/
rad2 = rad + bytesperpixel - 1;
much = ((((2 * rad2)/bytesperpixel)/2) * 2);
rump = ((bytesperpixel * much) / 2) - rad;
more = rad;
}
mask = (u8)rump;
margin = 0;
if (much == rex) {
mask |= 0x04;
if ((mex + 1) < FIELD_BUFFER_SIZE / PAGE_SIZE)
margin = *((u8 *)(peasycap->field_buffer[kex][mex + 1].pgo));
else
mask |= 0x08;
}
} else {
SAM("MISTAKE: %i=bytesperpixel\n",
bytesperpixel);
return -EFAULT;
}
if (rump)
caches++;
if (badinput) {
JOM(8, "ERROR: 0x%02X=->field_buffer"
"[%i][%i].input, "
"0x%02X=(0x08|->input)\n",
peasycap->field_buffer
[kex][mex].input, kex, mex,
(0x08|peasycap->input));
}
rc = redaub(peasycap, pad, pex, much, more,
mask, margin, isuy);
if (0 > rc) {
SAM("ERROR: redaub() failed\n");
return -EFAULT;
}
if (much % 4)
isuy = !isuy;
over -= much; cz += much;
pex += much; rex -= much;
if (!rex) {
mex++;
pex = peasycap->field_buffer[kex][mex].pgo;
rex = PAGE_SIZE;
if (peasycap->field_buffer[kex][mex].input != (0x08|peasycap->input))
badinput = true;
}
pad += more;
rad -= more;
if (!rad) {
mad++;
pad = peasycap->frame_buffer[kad][mad].pgo;
rad = PAGE_SIZE;
if (rump) {
pad += rump;
rad -= rump;
}
}
} while (over);
/*---------------------------------------------------------------------------*/
/*
* SKIP w3 BYTES IN TARGET FRAME BUFFER,
* UNLESS IT IS THE LAST LINE OF AN ODD FRAME
*/
/*---------------------------------------------------------------------------*/
if (!odd || (cz != wz)) {
over = w3;
do {
if (!rad) {
mad++;
pad = peasycap->frame_buffer
[kad][mad].pgo;
rad = PAGE_SIZE;
}
more = over;
if (rad < more)
more = rad;
over -= more;
pad += more;
rad -= more;
} while (over);
}
/*---------------------------------------------------------------------------*/
/*
* PROCESS ONE LINE OF FRAME AT REDUCED RESOLUTION:
* ONLY IF false==odd,
* READ w2 BYTES FROM FIELD BUFFER,
* WRITE w3 / 2 BYTES TO FRAME BUFFER
*/
/*---------------------------------------------------------------------------*/
} else if (!odd) {
over = w2;
do {
much = over; more = 0; margin = 0; mask = 0x00;
if (rex < much)
much = rex;
rump = 0;
if (much % 2) {
SAM("MISTAKE: much is odd\n");
return -EFAULT;
}
more = (bytesperpixel * much) / 4;
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
if (1 < bytesperpixel) {
if (rad * 4 < much * bytesperpixel) {
/*
* INJUDICIOUS ALTERATION OF
* THIS STATEMENT BLOCK
* WILL CAUSE BREAKAGE.
* BEWARE.
*/
rad2 = rad + bytesperpixel - 1;
much = ((((2 * rad2) / bytesperpixel) / 2) * 4);
rump = ((bytesperpixel * much) / 4) - rad;
more = rad;
}
mask = (u8)rump;
margin = 0;
if (much == rex) {
mask |= 0x04;
if ((mex + 1) < FIELD_BUFFER_SIZE / PAGE_SIZE)
margin = *((u8 *)(peasycap->field_buffer[kex][mex + 1].pgo));
else
mask |= 0x08;
}
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
} else {
SAM("MISTAKE: %i=bytesperpixel\n",
bytesperpixel);
return -EFAULT;
}
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
if (rump)
caches++;
if (badinput) {
JOM(8, "ERROR: 0x%02X=->field_buffer"
"[%i][%i].input, "
"0x%02X=(0x08|->input)\n",
peasycap->field_buffer
[kex][mex].input, kex, mex,
(0x08|peasycap->input));
}
rc = redaub(peasycap, pad, pex, much, more,
mask, margin, isuy);
if (0 > rc) {
SAM("ERROR: redaub() failed\n");
return -EFAULT;
}
over -= much; cz += much;
pex += much; rex -= much;
if (!rex) {
mex++;
pex = peasycap->field_buffer[kex][mex].pgo;
rex = PAGE_SIZE;
if (peasycap->field_buffer[kex][mex].input !=
(0x08|peasycap->input))
badinput = true;
}
pad += more;
rad -= more;
if (!rad) {
mad++;
pad = peasycap->frame_buffer[kad][mad].pgo;
rad = PAGE_SIZE;
if (rump) {
pad += rump;
rad -= rump;
}
}
} while (over);
/*---------------------------------------------------------------------------*/
/*
* OTHERWISE JUST
* READ w2 BYTES FROM FIELD BUFFER AND DISCARD THEM
*/
/*---------------------------------------------------------------------------*/
} else {
over = w2;
do {
if (!rex) {
mex++;
pex = peasycap->field_buffer[kex][mex].pgo;
rex = PAGE_SIZE;
if (peasycap->field_buffer[kex][mex].input !=
(0x08|peasycap->input)) {
JOM(8, "ERROR: 0x%02X=->field_buffer"
"[%i][%i].input, "
"0x%02X=(0x08|->input)\n",
peasycap->field_buffer
[kex][mex].input, kex, mex,
(0x08|peasycap->input));
badinput = true;
}
}
much = over;
if (rex < much)
much = rex;
over -= much;
cz += much;
pex += much;
rex -= much;
} while (over);
}
}
/*---------------------------------------------------------------------------*/
/*
* SANITY CHECKS
*/
/*---------------------------------------------------------------------------*/
c2 = (mex + 1)*PAGE_SIZE - rex;
if (cz != c2)
SAM("ERROR: discrepancy %i in bytes read\n", c2 - cz);
c3 = (mad + 1)*PAGE_SIZE - rad;
if (!decimatepixel) {
if (bytesperpixel * cz != c3)
SAM("ERROR: discrepancy %i in bytes written\n",
c3 - (bytesperpixel * cz));
} else {
if (!odd) {
if (bytesperpixel *
cz != (4 * c3))
SAM("ERROR: discrepancy %i in bytes written\n",
(2*c3)-(bytesperpixel * cz));
} else {
if (0 != c3)
SAM("ERROR: discrepancy %i "
"in bytes written\n", c3);
}
}
if (rump)
SAM("WORRY: undischarged cache at end of line in frame buffer\n");
JOM(8, "===== field2frame(): %i bytes --> %i bytes (incl skip)\n", c2, c3);
JOM(8, "===== field2frame(): %i=mad %i=rad\n", mad, rad);
if (odd)
JOM(8, "+++++ field2frame(): frame buffer %i is full\n", kad);
if (peasycap->field_read == peasycap->field_fill)
SAM("WARNING: on exit, filling field buffer %i\n",
peasycap->field_read);
/*---------------------------------------------------------------------------*/
/*
* CALCULATE VIDEO STREAMING RATE
*/
/*---------------------------------------------------------------------------*/
do_gettimeofday(&timeval);
if (peasycap->timeval6.tv_sec) {
below = ((long long int)(1000000)) *
((long long int)(timeval.tv_sec -
peasycap->timeval6.tv_sec)) +
(long long int)(timeval.tv_usec - peasycap->timeval6.tv_usec);
above = (long long int)1000000;
sdr = signed_div(above, below);
above = sdr.quotient;
remainder = (u32)sdr.remainder;
JOM(8, "video streaming at %3lli.%03i fields per second\n",
above, (remainder/1000));
}
peasycap->timeval6 = timeval;
if (caches)
JOM(8, "%i=caches\n", caches);
return 0;
}
/*****************************************************************************/
struct signed_div_result
signed_div(long long int above, long long int below)
{
struct signed_div_result sdr;
if (((0 <= above) && (0 <= below)) || ((0 > above) && (0 > below))) {
sdr.remainder = (unsigned long long int) do_div(above, below);
sdr.quotient = (long long int) above;
} else {
if (0 > above)
above = -above;
if (0 > below)
below = -below;
sdr.remainder = (unsigned long long int) do_div(above, below);
sdr.quotient = -((long long int) above);
}
return sdr;
}
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
/*
* DECIMATION AND COLOURSPACE CONVERSION.
*
* THIS ROUTINE REQUIRES THAT ALL THE DATA TO BE READ RESIDES ON ONE PAGE
* AND THAT ALL THE DATA TO BE WRITTEN RESIDES ON ONE (DIFFERENT) PAGE.
* THE CALLING ROUTINE MUST ENSURE THAT THIS REQUIREMENT IS MET, AND MUST
* ALSO ENSURE THAT much IS EVEN.
*
* much BYTES ARE READ, AT LEAST (bytesperpixel * much)/2 BYTES ARE WRITTEN
* IF THERE IS NO DECIMATION, HALF THIS AMOUNT IF THERE IS DECIMATION.
*
* mask IS ZERO WHEN NO SPECIAL BEHAVIOUR REQUIRED. OTHERWISE IT IS SET THUS:
* 0x03 & mask = number of bytes to be written to cache instead of to
* frame buffer
* 0x04 & mask => use argument margin to set the chrominance for last pixel
* 0x08 & mask => do not set the chrominance for last pixel
*
* YUV to RGB CONVERSION IS (OR SHOULD BE) ITU-R BT 601.
*
* THERE IS A LOT OF CODE REPETITION IN THIS ROUTINE IN ORDER TO AVOID
* INEFFICIENT SWITCHING INSIDE INNER LOOPS. REARRANGING THE LOGIC TO
* REDUCE CODE LENGTH WILL GENERALLY IMPAIR RUNTIME PERFORMANCE. BEWARE.
*/
/*---------------------------------------------------------------------------*/
int
redaub(struct easycap *peasycap, void *pad, void *pex, int much, int more,
u8 mask, u8 margin, bool isuy)
{
static s32 ay[256], bu[256], rv[256], gu[256], gv[256];
u8 *pcache;
u8 r, g, b, y, u, v, c, *p2, *p3, *pz, *pr;
int bytesperpixel;
bool byteswaporder, decimatepixel, last;
int j, rump;
s32 tmp;
if (much % 2) {
SAM("MISTAKE: much is odd\n");
return -EFAULT;
}
bytesperpixel = peasycap->bytesperpixel;
byteswaporder = peasycap->byteswaporder;
decimatepixel = peasycap->decimatepixel;
/*---------------------------------------------------------------------------*/
if (!bu[255]) {
for (j = 0; j < 112; j++) {
tmp = (0xFF00 & (453 * j)) >> 8;
bu[j + 128] = tmp; bu[127 - j] = -tmp;
tmp = (0xFF00 & (359 * j)) >> 8;
rv[j + 128] = tmp; rv[127 - j] = -tmp;
tmp = (0xFF00 & (88 * j)) >> 8;
gu[j + 128] = tmp; gu[127 - j] = -tmp;
tmp = (0xFF00 & (183 * j)) >> 8;
gv[j + 128] = tmp; gv[127 - j] = -tmp;
}
for (j = 0; j < 16; j++) {
bu[j] = bu[16]; rv[j] = rv[16];
gu[j] = gu[16]; gv[j] = gv[16];
}
for (j = 240; j < 256; j++) {
bu[j] = bu[239]; rv[j] = rv[239];
gu[j] = gu[239]; gv[j] = gv[239];
}
for (j = 16; j < 236; j++)
ay[j] = j;
for (j = 0; j < 16; j++)
ay[j] = ay[16];
for (j = 236; j < 256; j++)
ay[j] = ay[235];
JOM(8, "lookup tables are prepared\n");
}
pcache = peasycap->pcache;
if (!pcache)
pcache = &peasycap->cache[0];
/*---------------------------------------------------------------------------*/
/*
* TRANSFER CONTENTS OF CACHE TO THE FRAME BUFFER
*/
/*---------------------------------------------------------------------------*/
if (!pcache) {
SAM("MISTAKE: pcache is NULL\n");
return -EFAULT;
}
if (pcache != &peasycap->cache[0])
JOM(16, "cache has %i bytes\n", (int)(pcache - &peasycap->cache[0]));
p2 = &peasycap->cache[0];
p3 = (u8 *)pad - (int)(pcache - &peasycap->cache[0]);
while (p2 < pcache) {
*p3++ = *p2; p2++;
}
pcache = &peasycap->cache[0];
if (p3 != pad) {
SAM("MISTAKE: pointer misalignment\n");
return -EFAULT;
}
/*---------------------------------------------------------------------------*/
rump = (int)(0x03 & mask);
u = 0; v = 0;
p2 = (u8 *)pex; pz = p2 + much; pr = p3 + more; last = false;
p2++;
if (isuy)
u = *(p2 - 1);
else
v = *(p2 - 1);
if (rump)
JOM(16, "%4i=much %4i=more %i=rump\n", much, more, rump);
/*---------------------------------------------------------------------------*/
switch (bytesperpixel) {
case 2: {
if (!decimatepixel) {
memcpy(pad, pex, (size_t)much);
if (!byteswaporder) {
/* UYVY */
return 0;
} else {
/* YUYV */
p3 = (u8 *)pad; pz = p3 + much;
while (pz > p3) {
c = *p3;
*p3 = *(p3 + 1);
*(p3 + 1) = c;
p3 += 2;
}
return 0;
}
} else {
if (!byteswaporder) {
/* UYVY DECIMATED */
p2 = (u8 *)pex; p3 = (u8 *)pad; pz = p2 + much;
while (pz > p2) {
*p3 = *p2;
*(p3 + 1) = *(p2 + 1);
*(p3 + 2) = *(p2 + 2);
*(p3 + 3) = *(p2 + 3);
p3 += 4; p2 += 8;
}
return 0;
} else {
/* YUYV DECIMATED */
p2 = (u8 *)pex; p3 = (u8 *)pad; pz = p2 + much;
while (pz > p2) {
*p3 = *(p2 + 1);
*(p3 + 1) = *p2;
*(p3 + 2) = *(p2 + 3);
*(p3 + 3) = *(p2 + 2);
p3 += 4; p2 += 8;
}
return 0;
}
}
break;
}
case 3:
{
if (!decimatepixel) {
if (!byteswaporder) {
/* RGB */
while (pz > p2) {
if (pr <= (p3 + bytesperpixel))
last = true;
else
last = false;
y = *p2;
if (last && (0x0C & mask)) {
if (0x04 & mask) {
if (isuy)
v = margin;
else
u = margin;
} else
if (0x08 & mask)
;
} else {
if (isuy)
v = *(p2 + 1);
else
u = *(p2 + 1);
}
tmp = ay[(int)y] + rv[(int)v];
r = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
tmp = ay[(int)y] - gu[(int)u] - gv[(int)v];
g = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
tmp = ay[(int)y] + bu[(int)u];
b = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
if (last && rump) {
pcache = &peasycap->cache[0];
switch (bytesperpixel - rump) {
case 1: {
*p3 = r;
*pcache++ = g;
*pcache++ = b;
break;
}
case 2: {
*p3 = r;
*(p3 + 1) = g;
*pcache++ = b;
break;
}
default: {
SAM("MISTAKE: %i=rump\n",
bytesperpixel - rump);
return -EFAULT;
}
}
} else {
*p3 = r;
*(p3 + 1) = g;
*(p3 + 2) = b;
}
p2 += 2;
if (isuy)
isuy = false;
else
isuy = true;
p3 += bytesperpixel;
}
return 0;
} else {
/* BGR */
while (pz > p2) {
if (pr <= (p3 + bytesperpixel))
last = true;
else
last = false;
y = *p2;
if (last && (0x0C & mask)) {
if (0x04 & mask) {
if (isuy)
v = margin;
else
u = margin;
}
else
if (0x08 & mask)
;
} else {
if (isuy)
v = *(p2 + 1);
else
u = *(p2 + 1);
}
tmp = ay[(int)y] + rv[(int)v];
r = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
tmp = ay[(int)y] - gu[(int)u] - gv[(int)v];
g = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
tmp = ay[(int)y] + bu[(int)u];
b = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
if (last && rump) {
pcache = &peasycap->cache[0];
switch (bytesperpixel - rump) {
case 1: {
*p3 = b;
*pcache++ = g;
*pcache++ = r;
break;
}
case 2: {
*p3 = b;
*(p3 + 1) = g;
*pcache++ = r;
break;
}
default: {
SAM("MISTAKE: %i=rump\n",
bytesperpixel - rump);
return -EFAULT;
}
}
} else {
*p3 = b;
*(p3 + 1) = g;
*(p3 + 2) = r;
}
p2 += 2;
if (isuy)
isuy = false;
else
isuy = true;
p3 += bytesperpixel;
}
}
return 0;
} else {
if (!byteswaporder) {
/* RGB DECIMATED */
while (pz > p2) {
if (pr <= (p3 + bytesperpixel))
last = true;
else
last = false;
y = *p2;
if (last && (0x0C & mask)) {
if (0x04 & mask) {
if (isuy)
v = margin;
else
u = margin;
} else
if (0x08 & mask)
;
} else {
if (isuy)
v = *(p2 + 1);
else
u = *(p2 + 1);
}
if (isuy) {
tmp = ay[(int)y] + rv[(int)v];
r = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
tmp = ay[(int)y] - gu[(int)u] -
gv[(int)v];
g = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
tmp = ay[(int)y] + bu[(int)u];
b = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
if (last && rump) {
pcache = &peasycap->cache[0];
switch (bytesperpixel - rump) {
case 1: {
*p3 = r;
*pcache++ = g;
*pcache++ = b;
break;
}
case 2: {
*p3 = r;
*(p3 + 1) = g;
*pcache++ = b;
break;
}
default: {
SAM("MISTAKE: "
"%i=rump\n",
bytesperpixel - rump);
return -EFAULT;
}
}
} else {
*p3 = r;
*(p3 + 1) = g;
*(p3 + 2) = b;
}
isuy = false;
p3 += bytesperpixel;
} else {
isuy = true;
}
p2 += 2;
}
return 0;
} else {
/* BGR DECIMATED */
while (pz > p2) {
if (pr <= (p3 + bytesperpixel))
last = true;
else
last = false;
y = *p2;
if (last && (0x0C & mask)) {
if (0x04 & mask) {
if (isuy)
v = margin;
else
u = margin;
} else
if (0x08 & mask)
;
} else {
if (isuy)
v = *(p2 + 1);
else
u = *(p2 + 1);
}
if (isuy) {
tmp = ay[(int)y] + rv[(int)v];
r = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
tmp = ay[(int)y] - gu[(int)u] -
gv[(int)v];
g = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
tmp = ay[(int)y] + bu[(int)u];
b = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
if (last && rump) {
pcache = &peasycap->cache[0];
switch (bytesperpixel - rump) {
case 1: {
*p3 = b;
*pcache++ = g;
*pcache++ = r;
break;
}
case 2: {
*p3 = b;
*(p3 + 1) = g;
*pcache++ = r;
break;
}
default: {
SAM("MISTAKE: "
"%i=rump\n",
bytesperpixel - rump);
return -EFAULT;
}
}
} else {
*p3 = b;
*(p3 + 1) = g;
*(p3 + 2) = r;
}
isuy = false;
p3 += bytesperpixel;
}
else
isuy = true;
p2 += 2;
}
return 0;
}
}
break;
}
case 4:
{
if (!decimatepixel) {
if (!byteswaporder) {
/* RGBA */
while (pz > p2) {
if (pr <= (p3 + bytesperpixel))
last = true;
else
last = false;
y = *p2;
if (last && (0x0C & mask)) {
if (0x04 & mask) {
if (isuy)
v = margin;
else
u = margin;
} else
if (0x08 & mask)
;
} else {
if (isuy)
v = *(p2 + 1);
else
u = *(p2 + 1);
}
tmp = ay[(int)y] + rv[(int)v];
r = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
tmp = ay[(int)y] - gu[(int)u] - gv[(int)v];
g = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
tmp = ay[(int)y] + bu[(int)u];
b = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
if (last && rump) {
pcache = &peasycap->cache[0];
switch (bytesperpixel - rump) {
case 1: {
*p3 = r;
*pcache++ = g;
*pcache++ = b;
*pcache++ = 0;
break;
}
case 2: {
*p3 = r;
*(p3 + 1) = g;
*pcache++ = b;
*pcache++ = 0;
break;
}
case 3: {
*p3 = r;
*(p3 + 1) = g;
*(p3 + 2) = b;
*pcache++ = 0;
break;
}
default: {
SAM("MISTAKE: %i=rump\n",
bytesperpixel - rump);
return -EFAULT;
}
}
} else {
*p3 = r;
*(p3 + 1) = g;
*(p3 + 2) = b;
*(p3 + 3) = 0;
}
p2 += 2;
if (isuy)
isuy = false;
else
isuy = true;
p3 += bytesperpixel;
}
return 0;
} else {
/*
* BGRA
*/
while (pz > p2) {
if (pr <= (p3 + bytesperpixel))
last = true;
else
last = false;
y = *p2;
if (last && (0x0C & mask)) {
if (0x04 & mask) {
if (isuy)
v = margin;
else
u = margin;
} else
if (0x08 & mask)
;
} else {
if (isuy)
v = *(p2 + 1);
else
u = *(p2 + 1);
}
tmp = ay[(int)y] + rv[(int)v];
r = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
tmp = ay[(int)y] - gu[(int)u] - gv[(int)v];
g = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
tmp = ay[(int)y] + bu[(int)u];
b = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
if (last && rump) {
pcache = &peasycap->cache[0];
switch (bytesperpixel - rump) {
case 1: {
*p3 = b;
*pcache++ = g;
*pcache++ = r;
*pcache++ = 0;
break;
}
case 2: {
*p3 = b;
*(p3 + 1) = g;
*pcache++ = r;
*pcache++ = 0;
break;
}
case 3: {
*p3 = b;
*(p3 + 1) = g;
*(p3 + 2) = r;
*pcache++ = 0;
break;
}
default:
SAM("MISTAKE: %i=rump\n",
bytesperpixel - rump);
return -EFAULT;
}
} else {
*p3 = b;
*(p3 + 1) = g;
*(p3 + 2) = r;
*(p3 + 3) = 0;
}
p2 += 2;
if (isuy)
isuy = false;
else
isuy = true;
p3 += bytesperpixel;
}
}
return 0;
} else {
if (!byteswaporder) {
/*
* RGBA DECIMATED
*/
while (pz > p2) {
if (pr <= (p3 + bytesperpixel))
last = true;
else
last = false;
y = *p2;
if (last && (0x0C & mask)) {
if (0x04 & mask) {
if (isuy)
v = margin;
else
u = margin;
} else
if (0x08 & mask)
;
} else {
if (isuy)
v = *(p2 + 1);
else
u = *(p2 + 1);
}
if (isuy) {
tmp = ay[(int)y] + rv[(int)v];
r = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
tmp = ay[(int)y] - gu[(int)u] -
gv[(int)v];
g = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
tmp = ay[(int)y] + bu[(int)u];
b = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
if (last && rump) {
pcache = &peasycap->cache[0];
switch (bytesperpixel - rump) {
case 1: {
*p3 = r;
*pcache++ = g;
*pcache++ = b;
*pcache++ = 0;
break;
}
case 2: {
*p3 = r;
*(p3 + 1) = g;
*pcache++ = b;
*pcache++ = 0;
break;
}
case 3: {
*p3 = r;
*(p3 + 1) = g;
*(p3 + 2) = b;
*pcache++ = 0;
break;
}
default: {
SAM("MISTAKE: "
"%i=rump\n",
bytesperpixel -
rump);
return -EFAULT;
}
}
} else {
*p3 = r;
*(p3 + 1) = g;
*(p3 + 2) = b;
*(p3 + 3) = 0;
}
isuy = false;
p3 += bytesperpixel;
} else
isuy = true;
p2 += 2;
}
return 0;
} else {
/*
* BGRA DECIMATED
*/
while (pz > p2) {
if (pr <= (p3 + bytesperpixel))
last = true;
else
last = false;
y = *p2;
if (last && (0x0C & mask)) {
if (0x04 & mask) {
if (isuy)
v = margin;
else
u = margin;
} else
if (0x08 & mask)
;
} else {
if (isuy)
v = *(p2 + 1);
else
u = *(p2 + 1);
}
if (isuy) {
tmp = ay[(int)y] + rv[(int)v];
r = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
tmp = ay[(int)y] - gu[(int)u] -
gv[(int)v];
g = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
tmp = ay[(int)y] + bu[(int)u];
b = (255 < tmp) ? 255 : ((0 > tmp) ?
0 : (u8)tmp);
if (last && rump) {
pcache = &peasycap->cache[0];
switch (bytesperpixel - rump) {
case 1: {
*p3 = b;
*pcache++ = g;
*pcache++ = r;
*pcache++ = 0;
break;
}
case 2: {
*p3 = b;
*(p3 + 1) = g;
*pcache++ = r;
*pcache++ = 0;
break;
}
case 3: {
*p3 = b;
*(p3 + 1) = g;
*(p3 + 2) = r;
*pcache++ = 0;
break;
}
default: {
SAM("MISTAKE: "
"%i=rump\n",
bytesperpixel - rump);
return -EFAULT;
}
}
} else {
*p3 = b;
*(p3 + 1) = g;
*(p3 + 2) = r;
*(p3 + 3) = 0;
}
isuy = false;
p3 += bytesperpixel;
} else
isuy = true;
p2 += 2;
}
return 0;
}
}
break;
}
default: {
SAM("MISTAKE: %i=bytesperpixel\n", bytesperpixel);
return -EFAULT;
}
}
return 0;
}
/*****************************************************************************/
/*
* SEE CORBET ET AL. "LINUX DEVICE DRIVERS", 3rd EDITION, PAGES 430-434
*/
/*****************************************************************************/
static void easycap_vma_open(struct vm_area_struct *pvma)
{
struct easycap *peasycap;
peasycap = pvma->vm_private_data;
if (!peasycap) {
SAY("ERROR: peasycap is NULL\n");
return;
}
if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
SAY("ERROR: bad peasycap: %p\n", peasycap);
return;
}
peasycap->vma_many++;
JOT(8, "%i=peasycap->vma_many\n", peasycap->vma_many);
return;
}
/*****************************************************************************/
static void easycap_vma_close(struct vm_area_struct *pvma)
{
struct easycap *peasycap;
peasycap = pvma->vm_private_data;
if (!peasycap) {
SAY("ERROR: peasycap is NULL\n");
return;
}
if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
SAY("ERROR: bad peasycap: %p\n", peasycap);
return;
}
peasycap->vma_many--;
JOT(8, "%i=peasycap->vma_many\n", peasycap->vma_many);
return;
}
/*****************************************************************************/
static int easycap_vma_fault(struct vm_area_struct *pvma, struct vm_fault *pvmf)
{
int k, m, retcode;
void *pbuf;
struct page *page;
struct easycap *peasycap;
retcode = VM_FAULT_NOPAGE;
if (!pvma) {
SAY("pvma is NULL\n");
return retcode;
}
if (!pvmf) {
SAY("pvmf is NULL\n");
return retcode;
}
k = (pvmf->pgoff) / (FRAME_BUFFER_SIZE/PAGE_SIZE);
m = (pvmf->pgoff) % (FRAME_BUFFER_SIZE/PAGE_SIZE);
if (!m)
JOT(4, "%4i=k, %4i=m\n", k, m);
else
JOT(16, "%4i=k, %4i=m\n", k, m);
if ((0 > k) || (FRAME_BUFFER_MANY <= k)) {
SAY("ERROR: buffer index %i out of range\n", k);
return retcode;
}
if ((0 > m) || (FRAME_BUFFER_SIZE/PAGE_SIZE <= m)) {
SAY("ERROR: page number %i out of range\n", m);
return retcode;
}
peasycap = pvma->vm_private_data;
if (!peasycap) {
SAY("ERROR: peasycap is NULL\n");
return retcode;
}
/*---------------------------------------------------------------------------*/
pbuf = peasycap->frame_buffer[k][m].pgo;
if (!pbuf) {
SAM("ERROR: pbuf is NULL\n");
return retcode;
}
page = virt_to_page(pbuf);
if (!page) {
SAM("ERROR: page is NULL\n");
return retcode;
}
get_page(page);
/*---------------------------------------------------------------------------*/
if (!page) {
SAM("ERROR: page is NULL after get_page(page)\n");
} else {
pvmf->page = page;
retcode = VM_FAULT_MINOR;
}
return retcode;
}
static const struct vm_operations_struct easycap_vm_ops = {
.open = easycap_vma_open,
.close = easycap_vma_close,
.fault = easycap_vma_fault,
};
static int easycap_mmap(struct file *file, struct vm_area_struct *pvma)
{
JOT(8, "\n");
pvma->vm_ops = &easycap_vm_ops;
pvma->vm_flags |= VM_RESERVED;
if (file)
pvma->vm_private_data = file->private_data;
easycap_vma_open(pvma);
return 0;
}
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
/*
* ON COMPLETION OF A VIDEO URB ITS DATA IS COPIED TO THE FIELD BUFFERS
* PROVIDED peasycap->video_idle IS ZERO. REGARDLESS OF THIS BEING TRUE,
* IT IS RESUBMITTED PROVIDED peasycap->video_isoc_streaming IS NOT ZERO.
*
* THIS FUNCTION IS AN INTERRUPT SERVICE ROUTINE AND MUST NOT SLEEP.
*
* INFORMATION ABOUT THE VALIDITY OF THE CONTENTS OF THE FIELD BUFFER ARE
* STORED IN THE TWO-BYTE STATUS PARAMETER
* peasycap->field_buffer[peasycap->field_fill][0].kount
* NOTICE THAT THE INFORMATION IS STORED ONLY WITH PAGE 0 OF THE FIELD BUFFER.
*
* THE LOWER BYTE CONTAINS THE FIELD PARITY BYTE FURNISHED BY THE SAA7113H
* CHIP.
*
* THE UPPER BYTE IS ZERO IF NO PROBLEMS, OTHERWISE:
* 0 != (kount & 0x8000) => AT LEAST ONE URB COMPLETED WITH ERRORS
* 0 != (kount & 0x4000) => BUFFER HAS TOO MUCH DATA
* 0 != (kount & 0x2000) => BUFFER HAS NOT ENOUGH DATA
* 0 != (kount & 0x1000) => BUFFER HAS DATA FROM DISPARATE INPUTS
* 0 != (kount & 0x0400) => RESERVED
* 0 != (kount & 0x0200) => FIELD BUFFER NOT YET CHECKED
* 0 != (kount & 0x0100) => BUFFER HAS TWO EXTRA BYTES - WHY?
*/
/*---------------------------------------------------------------------------*/
static void easycap_complete(struct urb *purb)
{
struct easycap *peasycap;
struct data_buffer *pfield_buffer;
char errbuf[16];
int i, more, much, leap, rc, last;
int videofieldamount;
unsigned int override, bad;
int framestatus, framelength, frameactual, frameoffset;
u8 *pu;
if (!purb) {
SAY("ERROR: easycap_complete(): purb is NULL\n");
return;
}
peasycap = purb->context;
if (!peasycap) {
SAY("ERROR: easycap_complete(): peasycap is NULL\n");
return;
}
if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
SAY("ERROR: bad peasycap: %p\n", peasycap);
return;
}
if (peasycap->video_eof)
return;
for (i = 0; i < VIDEO_ISOC_BUFFER_MANY; i++)
if (purb->transfer_buffer == peasycap->video_isoc_buffer[i].pgo)
break;
JOM(16, "%2i=urb\n", i);
last = peasycap->video_isoc_sequence;
if ((((VIDEO_ISOC_BUFFER_MANY - 1) == last) && (0 != i)) ||
(((VIDEO_ISOC_BUFFER_MANY - 1) != last) && ((last + 1) != i))) {
JOM(16, "ERROR: out-of-order urbs %i,%i ... continuing\n",
last, i);
}
peasycap->video_isoc_sequence = i;
if (peasycap->video_idle) {
JOM(16, "%i=video_idle %i=video_isoc_streaming\n",
peasycap->video_idle, peasycap->video_isoc_streaming);
if (peasycap->video_isoc_streaming) {
rc = usb_submit_urb(purb, GFP_ATOMIC);
if (rc) {
SAM("%s:%d ENOMEM\n", strerror(rc), rc);
if (-ENODEV != rc)
SAM("ERROR: while %i=video_idle, "
"usb_submit_urb() "
"failed with rc:\n",
peasycap->video_idle);
}
}
return;
}
override = 0;
/*---------------------------------------------------------------------------*/
if (FIELD_BUFFER_MANY <= peasycap->field_fill) {
SAM("ERROR: bad peasycap->field_fill\n");
return;
}
if (purb->status) {
if ((-ESHUTDOWN == purb->status) || (-ENOENT == purb->status)) {
JOM(8, "urb status -ESHUTDOWN or -ENOENT\n");
return;
}
(peasycap->field_buffer[peasycap->field_fill][0].kount) |= 0x8000 ;
SAM("ERROR: bad urb status -%s: %d\n",
strerror(purb->status), purb->status);
/*---------------------------------------------------------------------------*/
} else {
for (i = 0; i < purb->number_of_packets; i++) {
if (0 != purb->iso_frame_desc[i].status) {
(peasycap->field_buffer
[peasycap->field_fill][0].kount) |= 0x8000 ;
/* FIXME: 1. missing '-' check boundaries */
strcpy(&errbuf[0],
strerror(purb->iso_frame_desc[i].status));
}
framestatus = purb->iso_frame_desc[i].status;
framelength = purb->iso_frame_desc[i].length;
frameactual = purb->iso_frame_desc[i].actual_length;
frameoffset = purb->iso_frame_desc[i].offset;
JOM(16, "frame[%2i]:"
"%4i=status "
"%4i=actual "
"%4i=length "
"%5i=offset\n",
i, framestatus, frameactual, framelength, frameoffset);
if (!purb->iso_frame_desc[i].status) {
more = purb->iso_frame_desc[i].actual_length;
pfield_buffer = &peasycap->field_buffer
[peasycap->field_fill][peasycap->field_page];
videofieldamount = (peasycap->field_page *
PAGE_SIZE) +
(int)(pfield_buffer->pto - pfield_buffer->pgo);
if (4 == more)
peasycap->video_mt++;
if (4 < more) {
if (peasycap->video_mt) {
JOM(8, "%4i empty video urb frames\n",
peasycap->video_mt);
peasycap->video_mt = 0;
}
if (FIELD_BUFFER_MANY <= peasycap->field_fill) {
SAM("ERROR: bad peasycap->field_fill\n");
return;
}
if (FIELD_BUFFER_SIZE/PAGE_SIZE <=
peasycap->field_page) {
SAM("ERROR: bad peasycap->field_page\n");
return;
}
pfield_buffer = &peasycap->field_buffer
[peasycap->field_fill][peasycap->field_page];
pu = (u8 *)(purb->transfer_buffer +
purb->iso_frame_desc[i].offset);
if (0x80 & *pu)
leap = 8;
else
leap = 4;
/*--------------------------------------------------------------------------*/
/*
* EIGHT-BYTE END-OF-VIDEOFIELD MARKER.
* NOTE: A SUCCESSION OF URB FRAMES FOLLOWING THIS ARE EMPTY,
* CORRESPONDING TO THE FIELD FLYBACK (VERTICAL BLANKING) PERIOD.
*
* PROVIDED THE FIELD BUFFER CONTAINS GOOD DATA AS INDICATED BY A ZERO UPPER
* BYTE OF
* peasycap->field_buffer[peasycap->field_fill][0].kount
* THE CONTENTS OF THE FIELD BUFFER ARE OFFERED TO dqbuf(), field_read IS
* UPDATED AND field_fill IS BUMPED. IF THE FIELD BUFFER CONTAINS BAD DATA
* NOTHING IS OFFERED TO dqbuf().
*
* THE DECISION ON WHETHER THE PARITY OF THE OFFERED FIELD BUFFER IS RIGHT
* RESTS WITH dqbuf().
*/
/*---------------------------------------------------------------------------*/
if ((8 == more) || override) {
if (videofieldamount >
peasycap->videofieldamount) {
if (2 == videofieldamount -
peasycap->
videofieldamount) {
(peasycap->field_buffer
[peasycap->field_fill]
[0].kount) |= 0x0100;
peasycap->video_junk += (1 +
VIDEO_JUNK_TOLERATE);
} else
(peasycap->field_buffer
[peasycap->field_fill]
[0].kount) |= 0x4000;
} else if (videofieldamount <
peasycap->
videofieldamount) {
(peasycap->field_buffer
[peasycap->field_fill]
[0].kount) |= 0x2000;
}
bad = 0xFF00 & peasycap->field_buffer
[peasycap->field_fill]
[0].kount;
if (!bad) {
(peasycap->video_junk)--;
if (-VIDEO_JUNK_TOLERATE >
peasycap->video_junk)
peasycap->video_junk =
-VIDEO_JUNK_TOLERATE;
peasycap->field_read =
(peasycap->
field_fill)++;
if (FIELD_BUFFER_MANY <=
peasycap->
field_fill)
peasycap->
field_fill = 0;
peasycap->field_page = 0;
pfield_buffer = &peasycap->
field_buffer
[peasycap->
field_fill]
[peasycap->
field_page];
pfield_buffer->pto =
pfield_buffer->pgo;
JOM(8, "bumped to: %i="
"peasycap->"
"field_fill %i="
"parity\n",
peasycap->field_fill,
0x00FF &
pfield_buffer->kount);
JOM(8, "field buffer %i has "
"%i bytes fit to be "
"read\n",
peasycap->field_read,
videofieldamount);
JOM(8, "wakeup call to "
"wq_video, "
"%i=field_read "
"%i=field_fill "
"%i=parity\n",
peasycap->field_read,
peasycap->field_fill,
0x00FF & peasycap->
field_buffer
[peasycap->
field_read][0].kount);
wake_up_interruptible
(&(peasycap->
wq_video));
do_gettimeofday
(&peasycap->timeval7);
} else {
peasycap->video_junk++;
if (bad & 0x0010)
peasycap->video_junk +=
(1 + VIDEO_JUNK_TOLERATE/2);
JOM(8, "field buffer %i had %i "
"bytes, now discarded: "
"0x%04X\n",
peasycap->field_fill,
videofieldamount,
(0xFF00 &
peasycap->field_buffer
[peasycap->field_fill][0].
kount));
(peasycap->field_fill)++;
if (FIELD_BUFFER_MANY <=
peasycap->field_fill)
peasycap->field_fill = 0;
peasycap->field_page = 0;
pfield_buffer =
&peasycap->field_buffer
[peasycap->field_fill]
[peasycap->field_page];
pfield_buffer->pto =
pfield_buffer->pgo;
JOM(8, "bumped to: %i=peasycap->"
"field_fill %i=parity\n",
peasycap->field_fill,
0x00FF & pfield_buffer->kount);
}
if (8 == more) {
JOM(8, "end-of-field: received "
"parity byte 0x%02X\n",
(0xFF & *pu));
if (0x40 & *pu)
pfield_buffer->kount = 0x0000;
else
pfield_buffer->kount = 0x0001;
pfield_buffer->input = 0x08 |
(0x07 & peasycap->input);
JOM(8, "end-of-field: 0x%02X=kount\n",
0xFF & pfield_buffer->kount);
}
}
/*---------------------------------------------------------------------------*/
/*
* COPY more BYTES FROM ISOC BUFFER TO FIELD BUFFER
*/
/*---------------------------------------------------------------------------*/
pu += leap;
more -= leap;
if (FIELD_BUFFER_MANY <= peasycap->field_fill) {
SAM("ERROR: bad peasycap->field_fill\n");
return;
}
if (FIELD_BUFFER_SIZE/PAGE_SIZE <= peasycap->field_page) {
SAM("ERROR: bad peasycap->field_page\n");
return;
}
pfield_buffer = &peasycap->field_buffer
[peasycap->field_fill][peasycap->field_page];
while (more) {
pfield_buffer = &peasycap->field_buffer
[peasycap->field_fill]
[peasycap->field_page];
if (PAGE_SIZE < (pfield_buffer->pto -
pfield_buffer->pgo)) {
SAM("ERROR: bad pfield_buffer->pto\n");
return;
}
if (PAGE_SIZE == (pfield_buffer->pto -
pfield_buffer->pgo)) {
(peasycap->field_page)++;
if (FIELD_BUFFER_SIZE/PAGE_SIZE <=
peasycap->field_page) {
JOM(16, "wrapping peasycap->"
"field_page\n");
peasycap->field_page = 0;
}
pfield_buffer = &peasycap->
field_buffer
[peasycap->field_fill]
[peasycap->field_page];
pfield_buffer->pto = pfield_buffer->pgo;
pfield_buffer->input = 0x08 |
(0x07 & peasycap->input);
if ((peasycap->field_buffer[peasycap->
field_fill][0]).
input !=
pfield_buffer->input)
(peasycap->field_buffer
[peasycap->field_fill]
[0]).kount |= 0x1000;
}
much = PAGE_SIZE -
(int)(pfield_buffer->pto -
pfield_buffer->pgo);
if (much > more)
much = more;
memcpy(pfield_buffer->pto, pu, much);
pu += much;
(pfield_buffer->pto) += much;
more -= much;
}
}
}
}
}
/*---------------------------------------------------------------------------*/
/*
* RESUBMIT THIS URB, UNLESS A SEVERE PERSISTENT ERROR CONDITION EXISTS.
*
* IF THE WAIT QUEUES ARE NOT CLEARED IN RESPONSE TO AN ERROR CONDITION
* THE USERSPACE PROGRAM, E.G. mplayer, MAY HANG ON EXIT. BEWARE.
*/
/*---------------------------------------------------------------------------*/
if (VIDEO_ISOC_BUFFER_MANY <= peasycap->video_junk) {
SAM("easycap driver shutting down on condition green\n");
peasycap->status = 1;
peasycap->video_eof = 1;
peasycap->video_junk = 0;
wake_up_interruptible(&peasycap->wq_video);
#if !defined(PERSEVERE)
peasycap->audio_eof = 1;
wake_up_interruptible(&peasycap->wq_audio);
#endif /*PERSEVERE*/
return;
}
if (peasycap->video_isoc_streaming) {
rc = usb_submit_urb(purb, GFP_ATOMIC);
if (rc) {
SAM("%s: %d\n", strerror(rc), rc);
if (-ENODEV != rc)
SAM("ERROR: while %i=video_idle, "
"usb_submit_urb() "
"failed with rc:\n",
peasycap->video_idle);
}
}
return;
}
static const struct file_operations easycap_fops = {
.owner = THIS_MODULE,
.open = easycap_open,
.unlocked_ioctl = easycap_unlocked_ioctl,
.poll = easycap_poll,
.mmap = easycap_mmap,
.llseek = no_llseek,
};
static const struct usb_class_driver easycap_class = {
.name = "usb/easycap%d",
.fops = &easycap_fops,
.minor_base = USB_SKEL_MINOR_BASE,
};
/*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/
static const struct v4l2_file_operations v4l2_fops = {
.owner = THIS_MODULE,
.open = easycap_open_noinode,
.unlocked_ioctl = easycap_unlocked_ioctl,
.poll = easycap_poll,
.mmap = easycap_mmap,
};
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
/*
* WHEN THE EasyCAP IS PHYSICALLY PLUGGED IN, THIS FUNCTION IS CALLED THREE
* TIMES, ONCE FOR EACH OF THE THREE INTERFACES. BEWARE.
*/
/*---------------------------------------------------------------------------*/
static int easycap_usb_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usb_device *usbdev;
struct usb_host_interface *alt;
struct usb_endpoint_descriptor *ep;
struct usb_interface_descriptor *interface;
struct urb *purb;
struct easycap *peasycap;
int ndong;
struct data_urb *pdata_urb;
int i, j, k, m, rc;
u8 bInterfaceNumber;
u8 bInterfaceClass;
u8 bInterfaceSubClass;
void *pbuf;
int okalt[8], isokalt;
int okepn[8];
int okmps[8];
int maxpacketsize;
u16 mask;
s32 value;
struct easycap_format *peasycap_format;
int fmtidx;
struct inputset *inputset;
struct v4l2_device *pv4l2_device;
usbdev = interface_to_usbdev(intf);
/*---------------------------------------------------------------------------*/
alt = usb_altnum_to_altsetting(intf, 0);
if (!alt) {
SAY("ERROR: usb_host_interface not found\n");
return -EFAULT;
}
interface = &alt->desc;
if (!interface) {
SAY("ERROR: intf_descriptor is NULL\n");
return -EFAULT;
}
/*---------------------------------------------------------------------------*/
/*
* GET PROPERTIES OF PROBED INTERFACE
*/
/*---------------------------------------------------------------------------*/
bInterfaceNumber = interface->bInterfaceNumber;
bInterfaceClass = interface->bInterfaceClass;
bInterfaceSubClass = interface->bInterfaceSubClass;
JOT(4, "intf[%i]: num_altsetting=%i\n",
bInterfaceNumber, intf->num_altsetting);
JOT(4, "intf[%i]: cur_altsetting - altsetting=%li\n",
bInterfaceNumber,
(long int)(intf->cur_altsetting - intf->altsetting));
JOT(4, "intf[%i]: bInterfaceClass=0x%02X bInterfaceSubClass=0x%02X\n",
bInterfaceNumber, bInterfaceClass, bInterfaceSubClass);
/*---------------------------------------------------------------------------*/
/*
* A NEW struct easycap IS ALWAYS ALLOCATED WHEN INTERFACE 0 IS PROBED.
* IT IS NOT POSSIBLE HERE TO FREE ANY EXISTING struct easycap. THIS
* SHOULD HAVE BEEN DONE BY easycap_delete() WHEN THE EasyCAP WAS
* PHYSICALLY UNPLUGGED.
*
* THE POINTER peasycap TO THE struct easycap IS REMEMBERED WHEN
* INTERFACES 1 AND 2 ARE PROBED.
*/
/*---------------------------------------------------------------------------*/
if (0 == bInterfaceNumber) {
peasycap = kzalloc(sizeof(struct easycap), GFP_KERNEL);
if (!peasycap) {
SAY("ERROR: Could not allocate peasycap\n");
return -ENOMEM;
}
/*---------------------------------------------------------------------------*/
/*
* PERFORM URGENT INTIALIZATIONS ...
*/
/*---------------------------------------------------------------------------*/
peasycap->minor = -1;
strcpy(&peasycap->telltale[0], TELLTALE);
kref_init(&peasycap->kref);
JOM(8, "intf[%i]: after kref_init(..._video) "
"%i=peasycap->kref.refcount.counter\n",
bInterfaceNumber, peasycap->kref.refcount.counter);
/* module params */
peasycap->gain = (s8)clamp(easycap_gain, 0, 31);
init_waitqueue_head(&peasycap->wq_video);
init_waitqueue_head(&peasycap->wq_audio);
init_waitqueue_head(&peasycap->wq_trigger);
if (mutex_lock_interruptible(&mutex_dongle)) {
SAY("ERROR: cannot down mutex_dongle\n");
return -ERESTARTSYS;
} else {
/*---------------------------------------------------------------------------*/
/*
* FOR INTERFACES 1 AND 2 THE POINTER peasycap WILL NEED TO
* TO BE THE SAME AS THAT ALLOCATED NOW FOR INTERFACE 0.
*
* NORMALLY ndong WILL NOT HAVE CHANGED SINCE INTERFACE 0 WAS
* PROBED, BUT THIS MAY NOT BE THE CASE IF, FOR EXAMPLE, TWO
* EASYCAPs ARE PLUGGED IN SIMULTANEOUSLY.
*/
/*---------------------------------------------------------------------------*/
for (ndong = 0; ndong < DONGLE_MANY; ndong++) {
if ((!easycapdc60_dongle[ndong].peasycap) &&
(!mutex_is_locked(&easycapdc60_dongle
[ndong].mutex_video)) &&
(!mutex_is_locked(&easycapdc60_dongle
[ndong].mutex_audio))) {
easycapdc60_dongle[ndong].peasycap = peasycap;
peasycap->isdongle = ndong;
JOM(8, "intf[%i]: peasycap-->easycap"
"_dongle[%i].peasycap\n",
bInterfaceNumber, ndong);
break;
}
}
if (DONGLE_MANY <= ndong) {
SAM("ERROR: too many dongles\n");
mutex_unlock(&mutex_dongle);
return -ENOMEM;
}
mutex_unlock(&mutex_dongle);
}
peasycap->allocation_video_struct = sizeof(struct easycap);
peasycap->allocation_video_page = 0;
peasycap->allocation_video_urb = 0;
peasycap->allocation_audio_struct = 0;
peasycap->allocation_audio_page = 0;
peasycap->allocation_audio_urb = 0;
/*---------------------------------------------------------------------------*/
/*
* ... AND FURTHER INITIALIZE THE STRUCTURE
*/
/*---------------------------------------------------------------------------*/
peasycap->pusb_device = usbdev;
peasycap->pusb_interface = intf;
peasycap->ilk = 0;
peasycap->microphone = false;
peasycap->video_interface = -1;
peasycap->video_altsetting_on = -1;
peasycap->video_altsetting_off = -1;
peasycap->video_endpointnumber = -1;
peasycap->video_isoc_maxframesize = -1;
peasycap->video_isoc_buffer_size = -1;
peasycap->audio_interface = -1;
peasycap->audio_altsetting_on = -1;
peasycap->audio_altsetting_off = -1;
peasycap->audio_endpointnumber = -1;
peasycap->audio_isoc_maxframesize = -1;
peasycap->audio_isoc_buffer_size = -1;
peasycap->frame_buffer_many = FRAME_BUFFER_MANY;
for (k = 0; k < INPUT_MANY; k++)
peasycap->lost[k] = 0;
peasycap->skip = 0;
peasycap->skipped = 0;
peasycap->offerfields = 0;
/*---------------------------------------------------------------------------*/
/*
* DYNAMICALLY FILL IN THE AVAILABLE FORMATS ...
*/
/*---------------------------------------------------------------------------*/
rc = fillin_formats();
if (0 > rc) {
SAM("ERROR: fillin_formats() rc = %i\n", rc);
return -EFAULT;
}
JOM(4, "%i formats available\n", rc);
/*---------------------------------------------------------------------------*/
/*
* ... AND POPULATE easycap.inputset[]
*/
/*---------------------------------------------------------------------------*/
/* FIXME: maybe we just use memset 0 */
inputset = peasycap->inputset;
for (k = 0; k < INPUT_MANY; k++) {
inputset[k].input_ok = 0;
inputset[k].standard_offset_ok = 0;
inputset[k].format_offset_ok = 0;
inputset[k].brightness_ok = 0;
inputset[k].contrast_ok = 0;
inputset[k].saturation_ok = 0;
inputset[k].hue_ok = 0;
}
fmtidx = peasycap->ntsc ? NTSC_M : PAL_BGHIN;
m = 0;
mask = 0;
for (i = 0; 0xFFFF != easycap_standard[i].mask; i++) {
if (fmtidx == easycap_standard[i].v4l2_standard.index) {
m++;
for (k = 0; k < INPUT_MANY; k++)
inputset[k].standard_offset = i;
mask = easycap_standard[i].mask;
}
}
if (1 != m) {
SAM("ERROR: "
"inputset->standard_offset unpopulated, %i=m\n", m);
return -ENOENT;
}
peasycap_format = &easycap_format[0];
m = 0;
for (i = 0; peasycap_format->v4l2_format.fmt.pix.width; i++) {
struct v4l2_pix_format *pix =
&peasycap_format->v4l2_format.fmt.pix;
if (((peasycap_format->mask & 0x0F) == (mask & 0x0F)) &&
pix->field == V4L2_FIELD_NONE &&
pix->pixelformat == V4L2_PIX_FMT_UYVY &&
pix->width == 640 && pix->height == 480) {
m++;
for (k = 0; k < INPUT_MANY; k++)
inputset[k].format_offset = i;
break;
}
peasycap_format++;
}
if (1 != m) {
SAM("ERROR: inputset[]->format_offset unpopulated\n");
return -ENOENT;
}
m = 0;
for (i = 0; 0xFFFFFFFF != easycap_control[i].id; i++) {
value = easycap_control[i].default_value;
if (V4L2_CID_BRIGHTNESS == easycap_control[i].id) {
m++;
for (k = 0; k < INPUT_MANY; k++)
inputset[k].brightness = value;
} else if (V4L2_CID_CONTRAST == easycap_control[i].id) {
m++;
for (k = 0; k < INPUT_MANY; k++)
inputset[k].contrast = value;
} else if (V4L2_CID_SATURATION == easycap_control[i].id) {
m++;
for (k = 0; k < INPUT_MANY; k++)
inputset[k].saturation = value;
} else if (V4L2_CID_HUE == easycap_control[i].id) {
m++;
for (k = 0; k < INPUT_MANY; k++)
inputset[k].hue = value;
}
}
if (4 != m) {
SAM("ERROR: inputset[]->brightness underpopulated\n");
return -ENOENT;
}
for (k = 0; k < INPUT_MANY; k++)
inputset[k].input = k;
JOM(4, "populated inputset[]\n");
JOM(4, "finished initialization\n");
} else {
/*---------------------------------------------------------------------------*/
/*
* FIXME
*
* IDENTIFY THE APPROPRIATE POINTER peasycap FOR INTERFACES 1 AND 2.
* THE ADDRESS OF peasycap->pusb_device IS RELUCTANTLY USED FOR THIS PURPOSE.
*/
/*---------------------------------------------------------------------------*/
for (ndong = 0; ndong < DONGLE_MANY; ndong++) {
if (usbdev == easycapdc60_dongle[ndong].peasycap->
pusb_device) {
peasycap = easycapdc60_dongle[ndong].peasycap;
JOT(8, "intf[%i]: dongle[%i].peasycap\n",
bInterfaceNumber, ndong);
break;
}
}
if (DONGLE_MANY <= ndong) {
SAY("ERROR: peasycap is unknown when probing interface %i\n",
bInterfaceNumber);
return -ENODEV;
}
if (!peasycap) {
SAY("ERROR: peasycap is NULL when probing interface %i\n",
bInterfaceNumber);
return -ENODEV;
}
/*---------------------------------------------------------------------------*/
/*
* SOME VERSIONS OF THE videodev MODULE OVERWRITE THE DATA WHICH HAS
* BEEN WRITTEN BY THE CALL TO usb_set_intfdata() IN easycap_usb_probe(),
* REPLACING IT WITH A POINTER TO THE EMBEDDED v4l2_device STRUCTURE.
* TO DETECT THIS, THE STRING IN THE easycap.telltale[] BUFFER IS CHECKED.
*/
/*---------------------------------------------------------------------------*/
if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
pv4l2_device = usb_get_intfdata(intf);
if (!pv4l2_device) {
SAY("ERROR: pv4l2_device is NULL\n");
return -ENODEV;
}
peasycap = (struct easycap *)
container_of(pv4l2_device, struct easycap, v4l2_device);
}
}
/*---------------------------------------------------------------------------*/
if ((USB_CLASS_VIDEO == bInterfaceClass) ||
(USB_CLASS_VENDOR_SPEC == bInterfaceClass)) {
if (-1 == peasycap->video_interface) {
peasycap->video_interface = bInterfaceNumber;
JOM(4, "setting peasycap->video_interface=%i\n",
peasycap->video_interface);
} else {
if (peasycap->video_interface != bInterfaceNumber) {
SAM("ERROR: attempting to reset "
"peasycap->video_interface\n");
SAM("...... continuing with "
"%i=peasycap->video_interface\n",
peasycap->video_interface);
}
}
} else if ((USB_CLASS_AUDIO == bInterfaceClass) &&
(USB_SUBCLASS_AUDIOSTREAMING == bInterfaceSubClass)) {
if (-1 == peasycap->audio_interface) {
peasycap->audio_interface = bInterfaceNumber;
JOM(4, "setting peasycap->audio_interface=%i\n",
peasycap->audio_interface);
} else {
if (peasycap->audio_interface != bInterfaceNumber) {
SAM("ERROR: attempting to reset "
"peasycap->audio_interface\n");
SAM("...... continuing with "
"%i=peasycap->audio_interface\n",
peasycap->audio_interface);
}
}
}
/*---------------------------------------------------------------------------*/
/*
* INVESTIGATE ALL ALTSETTINGS.
* DONE IN DETAIL BECAUSE USB DEVICE 05e1:0408 HAS DISPARATE INCARNATIONS.
*/
/*---------------------------------------------------------------------------*/
isokalt = 0;
for (i = 0; i < intf->num_altsetting; i++) {
alt = usb_altnum_to_altsetting(intf, i);
if (!alt) {
SAM("ERROR: alt is NULL\n");
return -EFAULT;
}
interface = &alt->desc;
if (!interface) {
SAM("ERROR: intf_descriptor is NULL\n");
return -EFAULT;
}
if (0 == interface->bNumEndpoints)
JOM(4, "intf[%i]alt[%i] has no endpoints\n",
bInterfaceNumber, i);
/*---------------------------------------------------------------------------*/
for (j = 0; j < interface->bNumEndpoints; j++) {
ep = &alt->endpoint[j].desc;
if (!ep) {
SAM("ERROR: ep is NULL.\n");
SAM("...... skipping\n");
continue;
}
if (!usb_endpoint_is_isoc_in(ep)) {
JOM(4, "intf[%i]alt[%i]end[%i] is a %d endpoint\n",
bInterfaceNumber,
i, j, ep->bmAttributes);
if (usb_endpoint_dir_out(ep)) {
SAM("ERROR: OUT endpoint unexpected\n");
SAM("...... continuing\n");
}
continue;
}
switch (bInterfaceClass) {
case USB_CLASS_VIDEO:
case USB_CLASS_VENDOR_SPEC: {
if (ep->wMaxPacketSize) {
if (8 > isokalt) {
okalt[isokalt] = i;
JOM(4,
"%i=okalt[%i]\n",
okalt[isokalt],
isokalt);
okepn[isokalt] =
ep->
bEndpointAddress &
0x0F;
JOM(4,
"%i=okepn[%i]\n",
okepn[isokalt],
isokalt);
okmps[isokalt] =
le16_to_cpu(ep->
wMaxPacketSize);
JOM(4,
"%i=okmps[%i]\n",
okmps[isokalt],
isokalt);
isokalt++;
}
} else {
if (-1 == peasycap->
video_altsetting_off) {
peasycap->
video_altsetting_off =
i;
JOM(4, "%i=video_"
"altsetting_off "
"<====\n",
peasycap->
video_altsetting_off);
} else {
SAM("ERROR: peasycap"
"->video_altsetting_"
"off already set\n");
SAM("...... "
"continuing with "
"%i=peasycap->video_"
"altsetting_off\n",
peasycap->
video_altsetting_off);
}
}
break;
}
case USB_CLASS_AUDIO: {
if (bInterfaceSubClass !=
USB_SUBCLASS_AUDIOSTREAMING)
break;
if (!peasycap) {
SAM("MISTAKE: "
"peasycap is NULL\n");
return -EFAULT;
}
if (ep->wMaxPacketSize) {
if (8 > isokalt) {
okalt[isokalt] = i ;
JOM(4,
"%i=okalt[%i]\n",
okalt[isokalt],
isokalt);
okepn[isokalt] =
ep->
bEndpointAddress &
0x0F;
JOM(4,
"%i=okepn[%i]\n",
okepn[isokalt],
isokalt);
okmps[isokalt] =
le16_to_cpu(ep->
wMaxPacketSize);
JOM(4,
"%i=okmps[%i]\n",
okmps[isokalt],
isokalt);
isokalt++;
}
} else {
if (-1 == peasycap->
audio_altsetting_off) {
peasycap->
audio_altsetting_off =
i;
JOM(4, "%i=audio_"
"altsetting_off "
"<====\n",
peasycap->
audio_altsetting_off);
} else {
SAM("ERROR: peasycap"
"->audio_altsetting_"
"off already set\n");
SAM("...... "
"continuing with "
"%i=peasycap->"
"audio_altsetting_"
"off\n",
peasycap->
audio_altsetting_off);
}
}
break;
}
default:
break;
}
if (0 == ep->wMaxPacketSize) {
JOM(4, "intf[%i]alt[%i]end[%i] "
"has zero packet size\n",
bInterfaceNumber, i, j);
}
}
}
/*---------------------------------------------------------------------------*/
/*
* PERFORM INITIALIZATION OF THE PROBED INTERFACE
*/
/*---------------------------------------------------------------------------*/
JOM(4, "initialization begins for interface %i\n",
interface->bInterfaceNumber);
switch (bInterfaceNumber) {
/*---------------------------------------------------------------------------*/
/*
* INTERFACE 0 IS THE VIDEO INTERFACE
*/
/*---------------------------------------------------------------------------*/
case 0: {
if (!peasycap) {
SAM("MISTAKE: peasycap is NULL\n");
return -EFAULT;
}
if (!isokalt) {
SAM("ERROR: no viable video_altsetting_on\n");
return -ENOENT;
} else {
peasycap->video_altsetting_on = okalt[isokalt - 1];
JOM(4, "%i=video_altsetting_on <====\n",
peasycap->video_altsetting_on);
}
/*---------------------------------------------------------------------------*/
/*
* DECIDE THE VIDEO STREAMING PARAMETERS
*/
/*---------------------------------------------------------------------------*/
peasycap->video_endpointnumber = okepn[isokalt - 1];
JOM(4, "%i=video_endpointnumber\n", peasycap->video_endpointnumber);
maxpacketsize = okmps[isokalt - 1];
peasycap->video_isoc_maxframesize =
min(maxpacketsize, USB_2_0_MAXPACKETSIZE);
if (0 >= peasycap->video_isoc_maxframesize) {
SAM("ERROR: bad video_isoc_maxframesize\n");
SAM(" possibly because port is USB 1.1\n");
return -ENOENT;
}
JOM(4, "%i=video_isoc_maxframesize\n",
peasycap->video_isoc_maxframesize);
peasycap->video_isoc_framesperdesc = VIDEO_ISOC_FRAMESPERDESC;
JOM(4, "%i=video_isoc_framesperdesc\n",
peasycap->video_isoc_framesperdesc);
if (0 >= peasycap->video_isoc_framesperdesc) {
SAM("ERROR: bad video_isoc_framesperdesc\n");
return -ENOENT;
}
peasycap->video_isoc_buffer_size =
peasycap->video_isoc_maxframesize *
peasycap->video_isoc_framesperdesc;
JOM(4, "%i=video_isoc_buffer_size\n",
peasycap->video_isoc_buffer_size);
if ((PAGE_SIZE << VIDEO_ISOC_ORDER) <
peasycap->video_isoc_buffer_size) {
SAM("MISTAKE: peasycap->video_isoc_buffer_size too big\n");
return -EFAULT;
}
/*---------------------------------------------------------------------------*/
if (-1 == peasycap->video_interface) {
SAM("MISTAKE: video_interface is unset\n");
return -EFAULT;
}
if (-1 == peasycap->video_altsetting_on) {
SAM("MISTAKE: video_altsetting_on is unset\n");
return -EFAULT;
}
if (-1 == peasycap->video_altsetting_off) {
SAM("MISTAKE: video_interface_off is unset\n");
return -EFAULT;
}
if (-1 == peasycap->video_endpointnumber) {
SAM("MISTAKE: video_endpointnumber is unset\n");
return -EFAULT;
}
if (-1 == peasycap->video_isoc_maxframesize) {
SAM("MISTAKE: video_isoc_maxframesize is unset\n");
return -EFAULT;
}
if (-1 == peasycap->video_isoc_buffer_size) {
SAM("MISTAKE: video_isoc_buffer_size is unset\n");
return -EFAULT;
}
/*---------------------------------------------------------------------------*/
/*
* ALLOCATE MEMORY FOR VIDEO BUFFERS. LISTS MUST BE INITIALIZED FIRST.
*/
/*---------------------------------------------------------------------------*/
INIT_LIST_HEAD(&(peasycap->urb_video_head));
peasycap->purb_video_head = &(peasycap->urb_video_head);
/*---------------------------------------------------------------------------*/
JOM(4, "allocating %i frame buffers of size %li\n",
FRAME_BUFFER_MANY, (long int)FRAME_BUFFER_SIZE);
JOM(4, ".... each scattered over %li pages\n",
FRAME_BUFFER_SIZE/PAGE_SIZE);
for (k = 0; k < FRAME_BUFFER_MANY; k++) {
for (m = 0; m < FRAME_BUFFER_SIZE/PAGE_SIZE; m++) {
if (peasycap->frame_buffer[k][m].pgo)
SAM("attempting to reallocate frame "
" buffers\n");
else {
pbuf = (void *)__get_free_page(GFP_KERNEL);
if (!pbuf) {
SAM("ERROR: Could not allocate frame "
"buffer %i page %i\n", k, m);
return -ENOMEM;
} else
peasycap->allocation_video_page += 1;
peasycap->frame_buffer[k][m].pgo = pbuf;
}
peasycap->frame_buffer[k][m].pto =
peasycap->frame_buffer[k][m].pgo;
}
}
peasycap->frame_fill = 0;
peasycap->frame_read = 0;
JOM(4, "allocation of frame buffers done: %i pages\n", k *
m);
/*---------------------------------------------------------------------------*/
JOM(4, "allocating %i field buffers of size %li\n",
FIELD_BUFFER_MANY, (long int)FIELD_BUFFER_SIZE);
JOM(4, ".... each scattered over %li pages\n",
FIELD_BUFFER_SIZE/PAGE_SIZE);
for (k = 0; k < FIELD_BUFFER_MANY; k++) {
for (m = 0; m < FIELD_BUFFER_SIZE/PAGE_SIZE; m++) {
if (peasycap->field_buffer[k][m].pgo) {
SAM("ERROR: attempting to reallocate "
"field buffers\n");
} else {
pbuf = (void *) __get_free_page(GFP_KERNEL);
if (!pbuf) {
SAM("ERROR: Could not allocate field"
" buffer %i page %i\n", k, m);
return -ENOMEM;
}
else
peasycap->allocation_video_page += 1;
peasycap->field_buffer[k][m].pgo = pbuf;
}
peasycap->field_buffer[k][m].pto =
peasycap->field_buffer[k][m].pgo;
}
peasycap->field_buffer[k][0].kount = 0x0200;
}
peasycap->field_fill = 0;
peasycap->field_page = 0;
peasycap->field_read = 0;
JOM(4, "allocation of field buffers done: %i pages\n", k *
m);
/*---------------------------------------------------------------------------*/
JOM(4, "allocating %i isoc video buffers of size %i\n",
VIDEO_ISOC_BUFFER_MANY,
peasycap->video_isoc_buffer_size);
JOM(4, ".... each occupying contiguous memory pages\n");
for (k = 0; k < VIDEO_ISOC_BUFFER_MANY; k++) {
pbuf = (void *)__get_free_pages(GFP_KERNEL,
VIDEO_ISOC_ORDER);
if (!pbuf) {
SAM("ERROR: Could not allocate isoc video buffer "
"%i\n", k);
return -ENOMEM;
} else
peasycap->allocation_video_page +=
BIT(VIDEO_ISOC_ORDER);
peasycap->video_isoc_buffer[k].pgo = pbuf;
peasycap->video_isoc_buffer[k].pto =
pbuf + peasycap->video_isoc_buffer_size;
peasycap->video_isoc_buffer[k].kount = k;
}
JOM(4, "allocation of isoc video buffers done: %i pages\n",
k * (0x01 << VIDEO_ISOC_ORDER));
/*---------------------------------------------------------------------------*/
/*
* ALLOCATE AND INITIALIZE MULTIPLE struct urb ...
*/
/*---------------------------------------------------------------------------*/
JOM(4, "allocating %i struct urb.\n", VIDEO_ISOC_BUFFER_MANY);
JOM(4, "using %i=peasycap->video_isoc_framesperdesc\n",
peasycap->video_isoc_framesperdesc);
JOM(4, "using %i=peasycap->video_isoc_maxframesize\n",
peasycap->video_isoc_maxframesize);
JOM(4, "using %i=peasycap->video_isoc_buffer_sizen",
peasycap->video_isoc_buffer_size);
for (k = 0; k < VIDEO_ISOC_BUFFER_MANY; k++) {
purb = usb_alloc_urb(peasycap->video_isoc_framesperdesc,
GFP_KERNEL);
if (!purb) {
SAM("ERROR: usb_alloc_urb returned NULL for buffer "
"%i\n", k);
return -ENOMEM;
} else
peasycap->allocation_video_urb += 1;
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
pdata_urb = kzalloc(sizeof(struct data_urb), GFP_KERNEL);
if (!pdata_urb) {
SAM("ERROR: Could not allocate struct data_urb.\n");
return -ENOMEM;
} else
peasycap->allocation_video_struct +=
sizeof(struct data_urb);
pdata_urb->purb = purb;
pdata_urb->isbuf = k;
pdata_urb->length = 0;
list_add_tail(&(pdata_urb->list_head),
peasycap->purb_video_head);
/*---------------------------------------------------------------------------*/
/*
* ... AND INITIALIZE THEM
*/
/*---------------------------------------------------------------------------*/
if (!k) {
JOM(4, "initializing video urbs thus:\n");
JOM(4, " purb->interval = 1;\n");
JOM(4, " purb->dev = peasycap->pusb_device;\n");
JOM(4, " purb->pipe = usb_rcvisocpipe"
"(peasycap->pusb_device,%i);\n",
peasycap->video_endpointnumber);
JOM(4, " purb->transfer_flags = URB_ISO_ASAP;\n");
JOM(4, " purb->transfer_buffer = peasycap->"
"video_isoc_buffer[.].pgo;\n");
JOM(4, " purb->transfer_buffer_length = %i;\n",
peasycap->video_isoc_buffer_size);
JOM(4, " purb->complete = easycap_complete;\n");
JOM(4, " purb->context = peasycap;\n");
JOM(4, " purb->start_frame = 0;\n");
JOM(4, " purb->number_of_packets = %i;\n",
peasycap->video_isoc_framesperdesc);
JOM(4, " for (j = 0; j < %i; j++)\n",
peasycap->video_isoc_framesperdesc);
JOM(4, " {\n");
JOM(4, " purb->iso_frame_desc[j].offset = j*%i;\n",
peasycap->video_isoc_maxframesize);
JOM(4, " purb->iso_frame_desc[j].length = %i;\n",
peasycap->video_isoc_maxframesize);
JOM(4, " }\n");
}
purb->interval = 1;
purb->dev = peasycap->pusb_device;
purb->pipe = usb_rcvisocpipe(peasycap->pusb_device,
peasycap->video_endpointnumber);
purb->transfer_flags = URB_ISO_ASAP;
purb->transfer_buffer = peasycap->video_isoc_buffer[k].pgo;
purb->transfer_buffer_length =
peasycap->video_isoc_buffer_size;
purb->complete = easycap_complete;
purb->context = peasycap;
purb->start_frame = 0;
purb->number_of_packets = peasycap->video_isoc_framesperdesc;
for (j = 0; j < peasycap->video_isoc_framesperdesc; j++) {
purb->iso_frame_desc[j].offset = j *
peasycap->video_isoc_maxframesize;
purb->iso_frame_desc[j].length =
peasycap->video_isoc_maxframesize;
}
}
JOM(4, "allocation of %i struct urb done.\n", k);
/*--------------------------------------------------------------------------*/
/*
* SAVE POINTER peasycap IN THIS INTERFACE.
*/
/*--------------------------------------------------------------------------*/
usb_set_intfdata(intf, peasycap);
/*---------------------------------------------------------------------------*/
/*
* IT IS ESSENTIAL TO INITIALIZE THE HARDWARE BEFORE, RATHER THAN AFTER,
* THE DEVICE IS REGISTERED, BECAUSE SOME VERSIONS OF THE videodev MODULE
* CALL easycap_open() IMMEDIATELY AFTER REGISTRATION, CAUSING A CLASH.
* BEWARE.
*/
/*---------------------------------------------------------------------------*/
peasycap->ntsc = easycap_ntsc;
JOM(8, "defaulting initially to %s\n",
easycap_ntsc ? "NTSC" : "PAL");
rc = reset(peasycap);
if (rc) {
SAM("ERROR: reset() rc = %i\n", rc);
return -EFAULT;
}
/*--------------------------------------------------------------------------*/
/*
* THE VIDEO DEVICE CAN BE REGISTERED NOW, AS IT IS READY.
*/
/*--------------------------------------------------------------------------*/
if (0 != (v4l2_device_register(&(intf->dev),
&(peasycap->v4l2_device)))) {
SAM("v4l2_device_register() failed\n");
return -ENODEV;
} else {
JOM(4, "registered device instance: %s\n",
&(peasycap->v4l2_device.name[0]));
}
/*---------------------------------------------------------------------------*/
/*
* FIXME
*
*
* THIS IS BELIEVED TO BE HARMLESS, BUT MAY WELL BE UNNECESSARY OR WRONG:
*/
/*---------------------------------------------------------------------------*/
peasycap->video_device.v4l2_dev = NULL;
/*---------------------------------------------------------------------------*/
strcpy(&peasycap->video_device.name[0], "easycapdc60");
peasycap->video_device.fops = &v4l2_fops;
peasycap->video_device.minor = -1;
peasycap->video_device.release = (void *)(&videodev_release);
video_set_drvdata(&(peasycap->video_device), (void *)peasycap);
if (0 != (video_register_device(&(peasycap->video_device),
VFL_TYPE_GRABBER, -1))) {
err("Not able to register with videodev");
videodev_release(&(peasycap->video_device));
return -ENODEV;
} else {
(peasycap->registered_video)++;
SAM("registered with videodev: %i=minor\n",
peasycap->video_device.minor);
peasycap->minor = peasycap->video_device.minor;
}
/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
break;
}
/*--------------------------------------------------------------------------*/
/*
* INTERFACE 1 IS THE AUDIO CONTROL INTERFACE
* INTERFACE 2 IS THE AUDIO STREAMING INTERFACE
*/
/*--------------------------------------------------------------------------*/
case 1: {
if (!peasycap) {
SAM("MISTAKE: peasycap is NULL\n");
return -EFAULT;
}
/*--------------------------------------------------------------------------*/
/*
* SAVE POINTER peasycap IN INTERFACE 1
*/
/*--------------------------------------------------------------------------*/
usb_set_intfdata(intf, peasycap);
JOM(4, "no initialization required for interface %i\n",
interface->bInterfaceNumber);
break;
}
/*--------------------------------------------------------------------------*/
case 2: {
if (!peasycap) {
SAM("MISTAKE: peasycap is NULL\n");
return -EFAULT;
}
if (!isokalt) {
SAM("ERROR: no viable audio_altsetting_on\n");
return -ENOENT;
} else {
peasycap->audio_altsetting_on = okalt[isokalt - 1];
JOM(4, "%i=audio_altsetting_on <====\n",
peasycap->audio_altsetting_on);
}
peasycap->audio_endpointnumber = okepn[isokalt - 1];
JOM(4, "%i=audio_endpointnumber\n", peasycap->audio_endpointnumber);
peasycap->audio_isoc_maxframesize = okmps[isokalt - 1];
JOM(4, "%i=audio_isoc_maxframesize\n",
peasycap->audio_isoc_maxframesize);
if (0 >= peasycap->audio_isoc_maxframesize) {
SAM("ERROR: bad audio_isoc_maxframesize\n");
return -ENOENT;
}
if (9 == peasycap->audio_isoc_maxframesize) {
peasycap->ilk |= 0x02;
SAM("audio hardware is microphone\n");
peasycap->microphone = true;
peasycap->audio_pages_per_fragment =
PAGES_PER_AUDIO_FRAGMENT;
} else if (256 == peasycap->audio_isoc_maxframesize) {
peasycap->ilk &= ~0x02;
SAM("audio hardware is AC'97\n");
peasycap->microphone = false;
peasycap->audio_pages_per_fragment =
PAGES_PER_AUDIO_FRAGMENT;
} else {
SAM("hardware is unidentified:\n");
SAM("%i=audio_isoc_maxframesize\n",
peasycap->audio_isoc_maxframesize);
return -ENOENT;
}
peasycap->audio_bytes_per_fragment =
peasycap->audio_pages_per_fragment * PAGE_SIZE;
peasycap->audio_buffer_page_many = (AUDIO_FRAGMENT_MANY *
peasycap->audio_pages_per_fragment);
JOM(4, "%6i=AUDIO_FRAGMENT_MANY\n", AUDIO_FRAGMENT_MANY);
JOM(4, "%6i=audio_pages_per_fragment\n",
peasycap->audio_pages_per_fragment);
JOM(4, "%6i=audio_bytes_per_fragment\n",
peasycap->audio_bytes_per_fragment);
JOM(4, "%6i=audio_buffer_page_many\n",
peasycap->audio_buffer_page_many);
peasycap->audio_isoc_framesperdesc = AUDIO_ISOC_FRAMESPERDESC;
JOM(4, "%i=audio_isoc_framesperdesc\n",
peasycap->audio_isoc_framesperdesc);
if (0 >= peasycap->audio_isoc_framesperdesc) {
SAM("ERROR: bad audio_isoc_framesperdesc\n");
return -ENOENT;
}
peasycap->audio_isoc_buffer_size =
peasycap->audio_isoc_maxframesize *
peasycap->audio_isoc_framesperdesc;
JOM(4, "%i=audio_isoc_buffer_size\n",
peasycap->audio_isoc_buffer_size);
if (AUDIO_ISOC_BUFFER_SIZE < peasycap->audio_isoc_buffer_size) {
SAM("MISTAKE: audio_isoc_buffer_size bigger "
"than %li=AUDIO_ISOC_BUFFER_SIZE\n",
AUDIO_ISOC_BUFFER_SIZE);
return -EFAULT;
}
if (-1 == peasycap->audio_interface) {
SAM("MISTAKE: audio_interface is unset\n");
return -EFAULT;
}
if (-1 == peasycap->audio_altsetting_on) {
SAM("MISTAKE: audio_altsetting_on is unset\n");
return -EFAULT;
}
if (-1 == peasycap->audio_altsetting_off) {
SAM("MISTAKE: audio_interface_off is unset\n");
return -EFAULT;
}
if (-1 == peasycap->audio_endpointnumber) {
SAM("MISTAKE: audio_endpointnumber is unset\n");
return -EFAULT;
}
if (-1 == peasycap->audio_isoc_maxframesize) {
SAM("MISTAKE: audio_isoc_maxframesize is unset\n");
return -EFAULT;
}
if (-1 == peasycap->audio_isoc_buffer_size) {
SAM("MISTAKE: audio_isoc_buffer_size is unset\n");
return -EFAULT;
}
/*---------------------------------------------------------------------------*/
/*
* ALLOCATE MEMORY FOR AUDIO BUFFERS. LISTS MUST BE INITIALIZED FIRST.
*/
/*---------------------------------------------------------------------------*/
INIT_LIST_HEAD(&(peasycap->urb_audio_head));
peasycap->purb_audio_head = &(peasycap->urb_audio_head);
#ifdef CONFIG_EASYCAP_OSS
JOM(4, "allocating an audio buffer\n");
JOM(4, ".... scattered over %i pages\n",
peasycap->audio_buffer_page_many);
for (k = 0; k < peasycap->audio_buffer_page_many; k++) {
if (peasycap->audio_buffer[k].pgo) {
SAM("ERROR: attempting to reallocate audio buffers\n");
} else {
pbuf = (void *) __get_free_page(GFP_KERNEL);
if (!pbuf) {
SAM("ERROR: Could not allocate audio "
"buffer page %i\n", k);
return -ENOMEM;
} else
peasycap->allocation_audio_page += 1;
peasycap->audio_buffer[k].pgo = pbuf;
}
peasycap->audio_buffer[k].pto = peasycap->audio_buffer[k].pgo;
}
peasycap->audio_fill = 0;
peasycap->audio_read = 0;
JOM(4, "allocation of audio buffer done: %i pages\n", k);
#endif /* CONFIG_EASYCAP_OSS */
/*---------------------------------------------------------------------------*/
JOM(4, "allocating %i isoc audio buffers of size %i\n",
AUDIO_ISOC_BUFFER_MANY,
peasycap->audio_isoc_buffer_size);
JOM(4, ".... each occupying contiguous memory pages\n");
for (k = 0; k < AUDIO_ISOC_BUFFER_MANY; k++) {
pbuf = (void *)__get_free_pages(GFP_KERNEL,
AUDIO_ISOC_ORDER);
if (!pbuf) {
SAM("ERROR: Could not allocate isoc audio buffer "
"%i\n", k);
return -ENOMEM;
} else
peasycap->allocation_audio_page +=
BIT(AUDIO_ISOC_ORDER);
peasycap->audio_isoc_buffer[k].pgo = pbuf;
peasycap->audio_isoc_buffer[k].pto = pbuf +
peasycap->audio_isoc_buffer_size;
peasycap->audio_isoc_buffer[k].kount = k;
}
JOM(4, "allocation of isoc audio buffers done.\n");
/*---------------------------------------------------------------------------*/
/*
* ALLOCATE AND INITIALIZE MULTIPLE struct urb ...
*/
/*---------------------------------------------------------------------------*/
JOM(4, "allocating %i struct urb.\n", AUDIO_ISOC_BUFFER_MANY);
JOM(4, "using %i=peasycap->audio_isoc_framesperdesc\n",
peasycap->audio_isoc_framesperdesc);
JOM(4, "using %i=peasycap->audio_isoc_maxframesize\n",
peasycap->audio_isoc_maxframesize);
JOM(4, "using %i=peasycap->audio_isoc_buffer_size\n",
peasycap->audio_isoc_buffer_size);
for (k = 0; k < AUDIO_ISOC_BUFFER_MANY; k++) {
purb = usb_alloc_urb(peasycap->audio_isoc_framesperdesc,
GFP_KERNEL);
if (!purb) {
SAM("ERROR: usb_alloc_urb returned NULL for buffer "
"%i\n", k);
return -ENOMEM;
}
peasycap->allocation_audio_urb += 1 ;
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
pdata_urb = kzalloc(sizeof(struct data_urb), GFP_KERNEL);
if (!pdata_urb) {
SAM("ERROR: Could not allocate struct data_urb.\n");
return -ENOMEM;
}
peasycap->allocation_audio_struct +=
sizeof(struct data_urb);
pdata_urb->purb = purb;
pdata_urb->isbuf = k;
pdata_urb->length = 0;
list_add_tail(&(pdata_urb->list_head),
peasycap->purb_audio_head);
/*---------------------------------------------------------------------------*/
/*
* ... AND INITIALIZE THEM
*/
/*---------------------------------------------------------------------------*/
if (!k) {
JOM(4, "initializing audio urbs thus:\n");
JOM(4, " purb->interval = 1;\n");
JOM(4, " purb->dev = peasycap->pusb_device;\n");
JOM(4, " purb->pipe = usb_rcvisocpipe(peasycap->"
"pusb_device,%i);\n",
peasycap->audio_endpointnumber);
JOM(4, " purb->transfer_flags = URB_ISO_ASAP;\n");
JOM(4, " purb->transfer_buffer = "
"peasycap->audio_isoc_buffer[.].pgo;\n");
JOM(4, " purb->transfer_buffer_length = %i;\n",
peasycap->audio_isoc_buffer_size);
#ifdef CONFIG_EASYCAP_OSS
JOM(4, " purb->complete = easyoss_complete;\n");
#else /* CONFIG_EASYCAP_OSS */
JOM(4, " purb->complete = easycap_alsa_complete;\n");
#endif /* CONFIG_EASYCAP_OSS */
JOM(4, " purb->context = peasycap;\n");
JOM(4, " purb->start_frame = 0;\n");
JOM(4, " purb->number_of_packets = %i;\n",
peasycap->audio_isoc_framesperdesc);
JOM(4, " for (j = 0; j < %i; j++)\n",
peasycap->audio_isoc_framesperdesc);
JOM(4, " {\n");
JOM(4, " purb->iso_frame_desc[j].offset = j*%i;\n",
peasycap->audio_isoc_maxframesize);
JOM(4, " purb->iso_frame_desc[j].length = %i;\n",
peasycap->audio_isoc_maxframesize);
JOM(4, " }\n");
}
purb->interval = 1;
purb->dev = peasycap->pusb_device;
purb->pipe = usb_rcvisocpipe(peasycap->pusb_device,
peasycap->audio_endpointnumber);
purb->transfer_flags = URB_ISO_ASAP;
purb->transfer_buffer = peasycap->audio_isoc_buffer[k].pgo;
purb->transfer_buffer_length =
peasycap->audio_isoc_buffer_size;
#ifdef CONFIG_EASYCAP_OSS
purb->complete = easyoss_complete;
#else /* CONFIG_EASYCAP_OSS */
purb->complete = easycap_alsa_complete;
#endif /* CONFIG_EASYCAP_OSS */
purb->context = peasycap;
purb->start_frame = 0;
purb->number_of_packets = peasycap->audio_isoc_framesperdesc;
for (j = 0; j < peasycap->audio_isoc_framesperdesc; j++) {
purb->iso_frame_desc[j].offset = j *
peasycap->audio_isoc_maxframesize;
purb->iso_frame_desc[j].length =
peasycap->audio_isoc_maxframesize;
}
}
JOM(4, "allocation of %i struct urb done.\n", k);
/*---------------------------------------------------------------------------*/
/*
* SAVE POINTER peasycap IN THIS INTERFACE.
*/
/*---------------------------------------------------------------------------*/
usb_set_intfdata(intf, peasycap);
/*---------------------------------------------------------------------------*/
/*
* THE AUDIO DEVICE CAN BE REGISTERED NOW, AS IT IS READY.
*/
/*---------------------------------------------------------------------------*/
#ifndef CONFIG_EASYCAP_OSS
JOM(4, "initializing ALSA card\n");
rc = easycap_alsa_probe(peasycap);
if (rc) {
err("easycap_alsa_probe() rc = %i\n", rc);
return -ENODEV;
}
#else /* CONFIG_EASYCAP_OSS */
rc = usb_register_dev(intf, &easyoss_class);
if (rc) {
SAY("ERROR: usb_register_dev() failed\n");
usb_set_intfdata(intf, NULL);
return -ENODEV;
}
SAM("easyoss attached to minor #%d\n", intf->minor);
#endif /* CONFIG_EASYCAP_OSS */
JOM(8, "kref_get() with %i=kref.refcount.counter\n",
peasycap->kref.refcount.counter);
kref_get(&peasycap->kref);
peasycap->registered_audio++;
break;
}
/*---------------------------------------------------------------------------*/
/*
* INTERFACES OTHER THAN 0, 1 AND 2 ARE UNEXPECTED
*/
/*---------------------------------------------------------------------------*/
default:
JOM(4, "ERROR: unexpected interface %i\n", bInterfaceNumber);
return -EINVAL;
}
SAM("ends successfully for interface %i\n", bInterfaceNumber);
return 0;
}
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
/*
* WHEN THIS FUNCTION IS CALLED THE EasyCAP HAS ALREADY BEEN PHYSICALLY
* UNPLUGGED. HENCE peasycap->pusb_device IS NO LONGER VALID.
*
* THIS FUNCTION AFFECTS BOTH OSS AND ALSA. BEWARE.
*/
/*---------------------------------------------------------------------------*/
static void easycap_usb_disconnect(struct usb_interface *pusb_interface)
{
struct usb_host_interface *pusb_host_interface;
struct usb_interface_descriptor *pusb_interface_descriptor;
u8 bInterfaceNumber;
struct easycap *peasycap;
struct list_head *plist_head;
struct data_urb *pdata_urb;
int minor, m, kd;
struct v4l2_device *pv4l2_device;
JOT(4, "\n");
pusb_host_interface = pusb_interface->cur_altsetting;
if (!pusb_host_interface) {
JOT(4, "ERROR: pusb_host_interface is NULL\n");
return;
}
pusb_interface_descriptor = &(pusb_host_interface->desc);
if (!pusb_interface_descriptor) {
JOT(4, "ERROR: pusb_interface_descriptor is NULL\n");
return;
}
bInterfaceNumber = pusb_interface_descriptor->bInterfaceNumber;
minor = pusb_interface->minor;
JOT(4, "intf[%i]: minor=%i\n", bInterfaceNumber, minor);
if (1 == bInterfaceNumber)
return;
peasycap = usb_get_intfdata(pusb_interface);
if (!peasycap) {
SAY("ERROR: peasycap is NULL\n");
return;
}
/*---------------------------------------------------------------------------*/
/*
* SOME VERSIONS OF THE videodev MODULE OVERWRITE THE DATA WHICH HAS
* BEEN WRITTEN BY THE CALL TO usb_set_intfdata() IN easycap_usb_probe(),
* REPLACING IT WITH A POINTER TO THE EMBEDDED v4l2_device STRUCTURE.
* TO DETECT THIS, THE STRING IN THE easycap.telltale[] BUFFER IS CHECKED.
*/
/*---------------------------------------------------------------------------*/
if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
pv4l2_device = usb_get_intfdata(pusb_interface);
if (!pv4l2_device) {
SAY("ERROR: pv4l2_device is NULL\n");
return;
}
peasycap = (struct easycap *)
container_of(pv4l2_device, struct easycap, v4l2_device);
}
/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
/*---------------------------------------------------------------------------*/
if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
SAY("ERROR: bad peasycap: %p\n", peasycap);
return;
}
/*---------------------------------------------------------------------------*/
/*
* IF THE WAIT QUEUES ARE NOT CLEARED A DEADLOCK IS POSSIBLE. BEWARE.
*/
/*---------------------------------------------------------------------------*/
peasycap->video_eof = 1;
peasycap->audio_eof = 1;
wake_up_interruptible(&(peasycap->wq_video));
wake_up_interruptible(&(peasycap->wq_audio));
/*---------------------------------------------------------------------------*/
switch (bInterfaceNumber) {
case 0: {
if (peasycap->purb_video_head) {
JOM(4, "killing video urbs\n");
m = 0;
list_for_each(plist_head, peasycap->purb_video_head) {
pdata_urb = list_entry(plist_head,
struct data_urb, list_head);
if (pdata_urb) {
if (pdata_urb->purb) {
usb_kill_urb(pdata_urb->purb);
m++;
}
}
}
JOM(4, "%i video urbs killed\n", m);
}
break;
}
/*---------------------------------------------------------------------------*/
case 2: {
if (peasycap->purb_audio_head) {
JOM(4, "killing audio urbs\n");
m = 0;
list_for_each(plist_head, peasycap->purb_audio_head) {
pdata_urb = list_entry(plist_head,
struct data_urb, list_head);
if (pdata_urb) {
if (pdata_urb->purb) {
usb_kill_urb(pdata_urb->purb);
m++;
}
}
}
JOM(4, "%i audio urbs killed\n", m);
}
break;
}
default:
break;
}
/*--------------------------------------------------------------------------*/
/*
* DEREGISTER
*
* THIS PROCEDURE WILL BLOCK UNTIL easycap_poll(), VIDEO IOCTL AND AUDIO
* IOCTL ARE ALL UNLOCKED. IF THIS IS NOT DONE AN Oops CAN OCCUR WHEN
* AN EasyCAP IS UNPLUGGED WHILE THE URBS ARE RUNNING. BEWARE.
*/
/*--------------------------------------------------------------------------*/
kd = isdongle(peasycap);
switch (bInterfaceNumber) {
case 0: {
if (0 <= kd && DONGLE_MANY > kd) {
wake_up_interruptible(&peasycap->wq_video);
JOM(4, "about to lock dongle[%i].mutex_video\n", kd);
if (mutex_lock_interruptible(&easycapdc60_dongle[kd].
mutex_video)) {
SAY("ERROR: "
"cannot lock dongle[%i].mutex_video\n", kd);
return;
}
JOM(4, "locked dongle[%i].mutex_video\n", kd);
} else {
SAY("ERROR: %i=kd is bad: cannot lock dongle\n", kd);
}
/*---------------------------------------------------------------------------*/
if (!peasycap->v4l2_device.name[0]) {
SAM("ERROR: peasycap->v4l2_device.name is empty\n");
if (0 <= kd && DONGLE_MANY > kd)
mutex_unlock(&easycapdc60_dongle[kd].mutex_video);
return;
}
v4l2_device_disconnect(&peasycap->v4l2_device);
JOM(4, "v4l2_device_disconnect() OK\n");
v4l2_device_unregister(&peasycap->v4l2_device);
JOM(4, "v4l2_device_unregister() OK\n");
video_unregister_device(&peasycap->video_device);
JOM(4, "intf[%i]: video_unregister_device() minor=%i\n",
bInterfaceNumber, minor);
peasycap->registered_video--;
/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
if (0 <= kd && DONGLE_MANY > kd) {
mutex_unlock(&easycapdc60_dongle[kd].mutex_video);
JOM(4, "unlocked dongle[%i].mutex_video\n", kd);
}
break;
}
case 2: {
if (0 <= kd && DONGLE_MANY > kd) {
wake_up_interruptible(&peasycap->wq_audio);
JOM(4, "about to lock dongle[%i].mutex_audio\n", kd);
if (mutex_lock_interruptible(&easycapdc60_dongle[kd].
mutex_audio)) {
SAY("ERROR: "
"cannot lock dongle[%i].mutex_audio\n", kd);
return;
}
JOM(4, "locked dongle[%i].mutex_audio\n", kd);
} else
SAY("ERROR: %i=kd is bad: cannot lock dongle\n", kd);
#ifndef CONFIG_EASYCAP_OSS
if (0 != snd_card_free(peasycap->psnd_card)) {
SAY("ERROR: snd_card_free() failed\n");
} else {
peasycap->psnd_card = NULL;
(peasycap->registered_audio)--;
}
#else /* CONFIG_EASYCAP_OSS */
usb_deregister_dev(pusb_interface, &easyoss_class);
peasycap->registered_audio--;
JOM(4, "intf[%i]: usb_deregister_dev()\n", bInterfaceNumber);
SAM("easyoss detached from minor #%d\n", minor);
#endif /* CONFIG_EASYCAP_OSS */
if (0 <= kd && DONGLE_MANY > kd) {
mutex_unlock(&easycapdc60_dongle[kd].mutex_audio);
JOM(4, "unlocked dongle[%i].mutex_audio\n", kd);
}
break;
}
default:
break;
}
/*---------------------------------------------------------------------------*/
/*
* CALL easycap_delete() IF NO REMAINING REFERENCES TO peasycap
* (ALSO WHEN ALSA HAS BEEN IN USE)
*/
/*---------------------------------------------------------------------------*/
if (!peasycap->kref.refcount.counter) {
SAM("ERROR: peasycap->kref.refcount.counter is zero "
"so cannot call kref_put()\n");
SAM("ending unsuccessfully: may cause memory leak\n");
return;
}
if (0 <= kd && DONGLE_MANY > kd) {
JOM(4, "about to lock dongle[%i].mutex_video\n", kd);
if (mutex_lock_interruptible(&easycapdc60_dongle[kd].mutex_video)) {
SAY("ERROR: cannot lock dongle[%i].mutex_video\n", kd);
SAM("ending unsuccessfully: may cause memory leak\n");
return;
}
JOM(4, "locked dongle[%i].mutex_video\n", kd);
JOM(4, "about to lock dongle[%i].mutex_audio\n", kd);
if (mutex_lock_interruptible(&easycapdc60_dongle[kd].mutex_audio)) {
SAY("ERROR: cannot lock dongle[%i].mutex_audio\n", kd);
mutex_unlock(&(easycapdc60_dongle[kd].mutex_video));
JOM(4, "unlocked dongle[%i].mutex_video\n", kd);
SAM("ending unsuccessfully: may cause memory leak\n");
return;
}
JOM(4, "locked dongle[%i].mutex_audio\n", kd);
}
JOM(4, "intf[%i]: %i=peasycap->kref.refcount.counter\n",
bInterfaceNumber, (int)peasycap->kref.refcount.counter);
kref_put(&peasycap->kref, easycap_delete);
JOT(4, "intf[%i]: kref_put() done.\n", bInterfaceNumber);
if (0 <= kd && DONGLE_MANY > kd) {
mutex_unlock(&(easycapdc60_dongle[kd].mutex_audio));
JOT(4, "unlocked dongle[%i].mutex_audio\n", kd);
mutex_unlock(&easycapdc60_dongle[kd].mutex_video);
JOT(4, "unlocked dongle[%i].mutex_video\n", kd);
}
/*---------------------------------------------------------------------------*/
JOM(4, "ends\n");
return;
}
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
/*
* PARAMETERS APPLICABLE TO ENTIRE DRIVER, I.E. BOTH VIDEO AND AUDIO
*/
/*---------------------------------------------------------------------------*/
static struct usb_device_id easycap_usb_device_id_table[] = {
{USB_DEVICE(USB_EASYCAP_VENDOR_ID, USB_EASYCAP_PRODUCT_ID)},
{ }
};
MODULE_DEVICE_TABLE(usb, easycap_usb_device_id_table);
struct usb_driver easycap_usb_driver = {
.name = "easycap",
.id_table = easycap_usb_device_id_table,
.probe = easycap_usb_probe,
.disconnect = easycap_usb_disconnect,
};
static int __init easycap_module_init(void)
{
int k, rc;
printk(KERN_INFO "Easycap version: "EASYCAP_DRIVER_VERSION "\n");
JOT(4, "begins. %i=debug %i=bars %i=gain\n",
easycap_debug, easycap_bars, easycap_gain);
mutex_init(&mutex_dongle);
for (k = 0; k < DONGLE_MANY; k++) {
easycapdc60_dongle[k].peasycap = NULL;
mutex_init(&easycapdc60_dongle[k].mutex_video);
mutex_init(&easycapdc60_dongle[k].mutex_audio);
}
rc = usb_register(&easycap_usb_driver);
if (rc)
printk(KERN_ERR "Easycap: usb_register failed rc=%d\n", rc);
return rc;
}
/*****************************************************************************/
static void __exit easycap_module_exit(void)
{
usb_deregister(&easycap_usb_driver);
}
/*****************************************************************************/
module_init(easycap_module_init);
module_exit(easycap_module_exit);
/*****************************************************************************/