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nest-open-source / nest-guard / 1.0 / linux / 6754b876e4c89285b30ff59800d23e21ce2dbe3f / . / linux / drivers / staging / easycap / easycap_main.c
blob: 5a4bbd9b453f1cc7a4753483518b7bc82466cfa3 [file] [log] [blame]
/******************************************************************************
* *
* 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 "easycap_standard.h"
int easycap_debug;
module_param(easycap_debug, int, S_IRUGO | S_IWUSR);
/*---------------------------------------------------------------------------*/
/*
* PARAMETERS APPLICABLE TO ENTIRE DRIVER, I.E. BOTH VIDEO AND AUDIO
*/
/*---------------------------------------------------------------------------*/
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,
};
/*---------------------------------------------------------------------------*/
/*
* 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.
*/
/*---------------------------------------------------------------------------*/
const struct file_operations easycap_fops = {
.owner = THIS_MODULE,
.open = easycap_open,
.release = easycap_release,
.unlocked_ioctl = easycap_ioctl,
.poll = easycap_poll,
.mmap = easycap_mmap,
.llseek = no_llseek,
};
struct vm_operations_struct easycap_vm_ops = {
.open = easycap_vma_open,
.close = easycap_vma_close,
.fault = easycap_vma_fault,
};
struct usb_class_driver easycap_class = {
.name = "usb/easycap%d",
.fops = &easycap_fops,
.minor_base = USB_SKEL_MINOR_BASE,
};
/*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/
#if defined(EASYCAP_IS_VIDEODEV_CLIENT)
#if defined(EASYCAP_NEEDS_V4L2_FOPS)
const struct v4l2_file_operations v4l2_fops = {
.owner = THIS_MODULE,
.open = easycap_open_noinode,
.release = easycap_release_noinode,
.unlocked_ioctl = easycap_ioctl,
.poll = easycap_poll,
.mmap = easycap_mmap,
};
#endif /*EASYCAP_NEEDS_V4L2_FOPS*/
int video_device_many /*=0*/;
struct video_device *pvideo_array[VIDEO_DEVICE_MANY], *pvideo_device;
#endif /*EASYCAP_IS_VIDEODEV_CLIENT*/
/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
/*--------------------------------------------------------------------------*/
/*
* PARAMETERS USED WHEN REGISTERING THE AUDIO INTERFACE
*/
/*--------------------------------------------------------------------------*/
const struct file_operations easysnd_fops = {
.owner = THIS_MODULE,
.open = easysnd_open,
.release = easysnd_release,
.unlocked_ioctl = easysnd_ioctl,
.read = easysnd_read,
.llseek = no_llseek,
};
struct usb_class_driver easysnd_class = {
.name = "usb/easysnd%d",
.fops = &easysnd_fops,
.minor_base = USB_SKEL_MINOR_BASE,
};
/****************************************************************************/
/*--------------------------------------------------------------------------*/
/*
* IT IS NOT APPROPRIATE FOR easycap_open() TO SUBMIT THE VIDEO URBS HERE,
* BECAUSE THERE WILL ALWAYS BE SUBSEQUENT NEGOTIATION OF TV STANDARD AND
* FORMAT BY IOCTL AND IT IS INADVISABLE TO HAVE THE URBS RUNNING WHILE
* REGISTERS OF THE SA7113H ARE BEING MANIPULATED.
*
* THE SUBMISSION OF VIDEO URBS IS THEREFORE DELAYED UNTIL THE IOCTL COMMAND
* STREAMON IS RECEIVED.
*/
/*--------------------------------------------------------------------------*/
/*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/
#if defined(EASYCAP_IS_VIDEODEV_CLIENT)
int
easycap_open_noinode(struct file *file)
{
return easycap_open((struct inode *)NULL, file);
}
#endif /*EASYCAP_IS_VIDEODEV_CLIENT*/
/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
int
easycap_open(struct inode *inode, struct file *file)
{
#if (!defined(EASYCAP_IS_VIDEODEV_CLIENT))
struct usb_interface *pusb_interface;
#endif /*EASYCAP_IS_VIDEODEV_CLIENT*/
struct usb_device *p;
struct easycap *peasycap;
int i, k, m, rc;
JOT(4, "\n");
SAY("==========OPEN=========\n");
peasycap = (struct easycap *)NULL;
#if (!defined(EASYCAP_IS_VIDEODEV_CLIENT))
if ((struct inode *)NULL == inode) {
SAY("ERROR: inode is NULL.\n");
return -EFAULT;
}
pusb_interface = usb_find_interface(&easycap_usb_driver, iminor(inode));
if (!pusb_interface) {
SAY("ERROR: pusb_interface is NULL.\n");
return -EFAULT;
}
peasycap = usb_get_intfdata(pusb_interface);
/*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/
#else
for (i = 0; i < video_device_many; i++) {
pvideo_device = pvideo_array[i];
if ((struct video_device *)NULL != pvideo_device) {
peasycap = (struct easycap *)video_get_drvdata(pvideo_device);
break;
}
}
/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
#endif /*EASYCAP_IS_VIDEODEV_CLIENT*/
if ((struct easycap *)NULL == peasycap) {
SAY("MISTAKE: peasycap is NULL\n");
return -EFAULT;
}
file->private_data = peasycap;
/*---------------------------------------------------------------------------*/
/*
* INITIALIZATION
*/
/*---------------------------------------------------------------------------*/
JOT(4, "starting initialization\n");
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);
}
p = peasycap->pusb_device;
if ((struct usb_device *)NULL == p) {
SAY("ERROR: peasycap->pusb_device is NULL\n");
return -EFAULT;
} else {
JOT(16, "0x%08lX=peasycap->pusb_device\n", \
(long int)peasycap->pusb_device);
}
rc = wakeup_device(peasycap->pusb_device);
if (0 == rc)
JOT(8, "wakeup_device() OK\n");
else {
SAY("ERROR: wakeup_device() returned %i\n", rc);
return -EFAULT;
}
rc = setup_stk(p); peasycap->input = 0;
if (0 == rc)
JOT(8, "setup_stk() OK\n");
else {
SAY("ERROR: setup_stk() returned %i\n", rc);
return -EFAULT;
}
rc = setup_saa(p);
if (0 == rc)
JOT(8, "setup_saa() OK\n");
else {
SAY("ERROR: setup_saa() returned %i\n", rc);
return -EFAULT;
}
rc = check_saa(p);
if (0 == rc)
JOT(8, "check_saa() OK\n");
else if (-8 < rc)
SAY("check_saa() returned %i\n", rc);
else {
SAY("ERROR: check_saa() returned %i\n", rc);
return -EFAULT;
}
peasycap->standard_offset = -1;
/*---------------------------------------------------------------------------*/
#if defined(PREFER_NTSC)
rc = adjust_standard(peasycap, V4L2_STD_NTSC_M);
if (0 == rc)
JOT(8, "adjust_standard(.,NTSC_M) OK\n");
else {
SAY("ERROR: adjust_standard(.,NTSC_M) returned %i\n", rc);
return -EFAULT;
}
rc = adjust_format(peasycap, 640, 480, V4L2_PIX_FMT_UYVY, V4L2_FIELD_NONE, \
false);
if (0 <= rc)
JOT(8, "adjust_format(.,640,480,UYVY) OK\n");
else {
SAY("ERROR: adjust_format(.,640,480,UYVY) returned %i\n", rc);
return -EFAULT;
}
#else
rc = adjust_standard(peasycap, \
(V4L2_STD_PAL_B | V4L2_STD_PAL_G | V4L2_STD_PAL_H | \
V4L2_STD_PAL_I | V4L2_STD_PAL_N));
if (0 == rc)
JOT(8, "adjust_standard(.,PAL_BGHIN) OK\n");
else {
SAY("ERROR: adjust_standard(.,PAL_BGHIN) returned %i\n", rc);
return -EFAULT;
}
rc = adjust_format(peasycap, 640, 480, V4L2_PIX_FMT_UYVY, V4L2_FIELD_NONE, \
false);
if (0 <= rc)
JOT(8, "adjust_format(.,640,480,uyvy,false) OK\n");
else {
SAY("ERROR: adjust_format(.,640,480,uyvy,false) returned %i\n", rc);
return -EFAULT;
}
#endif /* !PREFER_NTSC*/
/*---------------------------------------------------------------------------*/
rc = adjust_brightness(peasycap, -8192);
if (0 != rc) {
SAY("ERROR: adjust_brightness(default) returned %i\n", rc);
return -EFAULT;
}
rc = adjust_contrast(peasycap, -8192);
if (0 != rc) {
SAY("ERROR: adjust_contrast(default) returned %i\n", rc);
return -EFAULT;
}
rc = adjust_saturation(peasycap, -8192);
if (0 != rc) {
SAY("ERROR: adjust_saturation(default) returned %i\n", rc);
return -EFAULT;
}
rc = adjust_hue(peasycap, -8192);
if (0 != rc) {
SAY("ERROR: adjust_hue(default) returned %i\n", rc);
return -EFAULT;
}
/*---------------------------------------------------------------------------*/
rc = usb_set_interface(peasycap->pusb_device, peasycap->video_interface, \
peasycap->video_altsetting_on);
if (0 == rc)
JOT(8, "usb_set_interface(.,%i,%i) OK\n", peasycap->video_interface, \
peasycap->video_altsetting_on);
else {
SAY("ERROR: usb_set_interface() returned %i\n", rc);
return -EFAULT;
}
rc = start_100(p);
if (0 == rc)
JOT(8, "start_100() OK\n");
else {
SAY("ERROR: start_100() returned %i\n", rc);
return -EFAULT;
}
peasycap->video_isoc_sequence = VIDEO_ISOC_BUFFER_MANY - 1;
peasycap->video_idle = 0;
peasycap->video_junk = 0;
for (i = 0; i < 180; i++)
peasycap->merit[i] = 0;
peasycap->video_eof = 0;
peasycap->audio_eof = 0;
do_gettimeofday(&peasycap->timeval7);
peasycap->fudge = 0;
JOT(4, "finished initialization\n");
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, m, rc;
int isbuf;
if ((struct list_head *)NULL == peasycap->purb_video_head) {
SAY("ERROR: peasycap->urb_video_head uninitialized\n");
return -EFAULT;
}
if ((struct usb_device *)NULL == peasycap->pusb_device) {
SAY("ERROR: peasycap->pusb_device is NULL\n");
return -EFAULT;
}
if (!peasycap->video_isoc_streaming) {
JOT(4, "submission of all video urbs\n");
if (0 != ready_saa(peasycap->pusb_device)) {
SAY("ERROR: not ready to capture after waiting " \
"one second\n");
SAY("..... continuing anyway\n");
}
isbad = 0; m = 0;
list_for_each(plist_head, (peasycap->purb_video_head)) {
pdata_urb = list_entry(plist_head, struct data_urb, list_head);
if (NULL != pdata_urb) {
purb = pdata_urb->purb;
if (NULL != 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 (0 != rc) {
isbad++;
SAY("ERROR: usb_submit_urb() failed " \
"for urb with rc:\n");
switch (rc) {
case -ENOMEM: {
SAY("ENOMEM\n");
break;
}
case -ENODEV: {
SAY("ENODEV\n");
break;
}
case -ENXIO: {
SAY("ENXIO\n");
break;
}
case -EINVAL: {
SAY("EINVAL\n");
break;
}
case -EAGAIN: {
SAY("EAGAIN\n");
break;
}
case -EFBIG: {
SAY("EFBIG\n");
break;
}
case -EPIPE: {
SAY("EPIPE\n");
break;
}
case -EMSGSIZE: {
SAY("EMSGSIZE\n");
break;
}
default: {
SAY("unknown error code %i\n",\
rc);
break;
}
}
} else {
m++;
}
} else {
isbad++;
}
} else {
isbad++;
}
}
if (isbad) {
JOT(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 (NULL != pdata_urb) {
purb = pdata_urb->purb;
if (NULL != purb)
usb_kill_urb(purb);
}
}
peasycap->video_isoc_streaming = 0;
} else {
peasycap->video_isoc_streaming = 1;
JOT(4, "submitted %i video urbs\n", m);
}
} else {
JOT(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 ((struct easycap *)NULL == peasycap) {
SAY("ERROR: peasycap is NULL\n");
return -EFAULT;
}
if (peasycap->video_isoc_streaming) {
if ((struct list_head *)NULL != peasycap->purb_video_head) {
peasycap->video_isoc_streaming = 0;
JOT(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 ((struct data_urb *)NULL != pdata_urb) {
if ((struct urb *)NULL != pdata_urb->purb) {
usb_kill_urb(pdata_urb->purb);
m++;
}
}
}
JOT(4, "%i video urbs killed\n", m);
} else {
SAY("ERROR: peasycap->purb_video_head is NULL\n");
return -EFAULT;
}
} else {
JOT(8, "%i=video_isoc_streaming, no video urbs killed\n", \
peasycap->video_isoc_streaming);
}
return 0;
}
/****************************************************************************/
/*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/
#if defined(EASYCAP_IS_VIDEODEV_CLIENT)
int
easycap_release_noinode(struct file *file)
{
return easycap_release((struct inode *)NULL, file);
}
#endif /*EASYCAP_IS_VIDEODEV_CLIENT*/
/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
/*--------------------------------------------------------------------------*/
int
easycap_release(struct inode *inode, struct file *file)
{
#if (!defined(EASYCAP_IS_VIDEODEV_CLIENT))
struct easycap *peasycap;
JOT(4, "\n");
peasycap = file->private_data;
if (NULL == peasycap) {
SAY("ERROR: peasycap is NULL.\n");
SAY("ending unsuccessfully\n");
return -EFAULT;
}
if (0 != kill_video_urbs(peasycap)) {
SAY("ERROR: kill_video_urbs() failed\n");
return -EFAULT;
}
JOT(4, "ending successfully\n");
/*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/
#else
#
/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
#endif /*EASYCAP_IS_VIDEODEV_CLIENT*/
return 0;
}
/****************************************************************************/
/*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/
#if defined(EASYCAP_IS_VIDEODEV_CLIENT)
int
videodev_release(struct video_device *pvd)
{
struct easycap *peasycap;
int i, j, k;
JOT(4, "\n");
k = 0;
for (i = 0; i < video_device_many; i++) {
pvideo_device = pvideo_array[i];
if ((struct video_device *)NULL != pvideo_device) {
if (pvd->minor == pvideo_device->minor) {
peasycap = (struct easycap *)\
video_get_drvdata(pvideo_device);
if ((struct easycap *)NULL == peasycap) {
SAY("ERROR: peasycap is NULL\n");
SAY("ending unsuccessfully\n");
return -EFAULT;
}
if (0 != kill_video_urbs(peasycap)) {
SAY("ERROR: kill_video_urbs() failed\n");
return -EFAULT;
}
JOT(4, "freeing video_device structure: " \
"/dev/video%i\n", i);
kfree((void *)pvideo_device);
for (j = i; j < (VIDEO_DEVICE_MANY - 1); j++)
pvideo_array[j] = pvideo_array[j + 1];
video_device_many--; k++;
break;
}
}
}
if (!k) {
SAY("ERROR: lost video_device structure for %i=minor\n", pvd->minor);
SAY("cannot free: may cause memory leak\n");
SAY("ending unsuccessfully\n");
return -EFAULT;
}
JOT(4, "ending successfully\n");
return 0;
}
#endif /*EASYCAP_IS_VIDEODEV_CLIENT*/
/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
/****************************************************************************/
/*--------------------------------------------------------------------------*/
/*
* THIS FUNCTION IS CALLED FROM WITHIN easycap_usb_disconnect().
* BY THIS STAGE THE DEVICE HAS ALREADY BEEN PHYSICALLY UNPLUGGED.
* peasycap->pusb_device IS NO LONGER VALID AND SHOULD HAVE BEEN SET TO NULL.
*/
/*---------------------------------------------------------------------------*/
void
easycap_delete(struct kref *pkref)
{
int k, m, lost;
int allocation_video_urb, allocation_video_page, allocation_video_struct;
int allocation_audio_urb, allocation_audio_page, allocation_audio_struct;
int registered_video, registered_audio;
struct easycap *peasycap;
struct data_urb *pdata_urb;
struct list_head *plist_head, *plist_next;
JOT(4, "\n");
peasycap = container_of(pkref, struct easycap, kref);
if ((struct easycap *)NULL == peasycap) {
SAY("ERROR: peasycap is NULL: cannot perform deletions\n");
return;
}
/*---------------------------------------------------------------------------*/
/*
* FREE VIDEO.
*/
/*---------------------------------------------------------------------------*/
if ((struct list_head *)NULL != peasycap->purb_video_head) {
JOT(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 (NULL == pdata_urb)
JOT(4, "ERROR: pdata_urb is NULL\n");
else {
if ((struct urb *)NULL != pdata_urb->purb) {
usb_free_urb(pdata_urb->purb);
pdata_urb->purb = (struct urb *)NULL;
peasycap->allocation_video_urb -= 1;
m++;
}
}
}
JOT(4, "%i video urbs freed\n", m);
/*---------------------------------------------------------------------------*/
JOT(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 ((struct data_urb *)NULL != pdata_urb) {
kfree(pdata_urb); pdata_urb = (struct data_urb *)NULL;
peasycap->allocation_video_struct -= \
sizeof(struct data_urb);
m++;
}
}
JOT(4, "%i video data_urb structures freed\n", m);
JOT(4, "setting peasycap->purb_video_head=NULL\n");
peasycap->purb_video_head = (struct list_head *)NULL;
} else {
JOT(4, "peasycap->purb_video_head is NULL\n");
}
/*---------------------------------------------------------------------------*/
JOT(4, "freeing video isoc buffers.\n");
m = 0;
for (k = 0; k < VIDEO_ISOC_BUFFER_MANY; k++) {
if ((void *)NULL != 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 = (void *)NULL;
peasycap->allocation_video_page -= \
((unsigned int)(0x01 << VIDEO_ISOC_ORDER));
m++;
}
}
JOT(4, "isoc video buffers freed: %i pages\n", m * (0x01 << VIDEO_ISOC_ORDER));
/*---------------------------------------------------------------------------*/
JOT(4, "freeing video field buffers.\n");
lost = 0;
for (k = 0; k < FIELD_BUFFER_MANY; k++) {
for (m = 0; m < FIELD_BUFFER_SIZE/PAGE_SIZE; m++) {
if ((void *)NULL != peasycap->field_buffer[k][m].pgo) {
free_page((unsigned long)\
(peasycap->field_buffer[k][m].pgo));
peasycap->field_buffer[k][m].pgo = (void *)NULL;
peasycap->allocation_video_page -= 1;
lost++;
}
}
}
JOT(4, "video field buffers freed: %i pages\n", lost);
/*---------------------------------------------------------------------------*/
JOT(4, "freeing video frame buffers.\n");
lost = 0;
for (k = 0; k < FRAME_BUFFER_MANY; k++) {
for (m = 0; m < FRAME_BUFFER_SIZE/PAGE_SIZE; m++) {
if ((void *)NULL != peasycap->frame_buffer[k][m].pgo) {
free_page((unsigned long)\
(peasycap->frame_buffer[k][m].pgo));
peasycap->frame_buffer[k][m].pgo = (void *)NULL;
peasycap->allocation_video_page -= 1;
lost++;
}
}
}
JOT(4, "video frame buffers freed: %i pages\n", lost);
/*---------------------------------------------------------------------------*/
/*
* FREE AUDIO.
*/
/*---------------------------------------------------------------------------*/
if ((struct list_head *)NULL != peasycap->purb_audio_head) {
JOT(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 (NULL == pdata_urb)
JOT(4, "ERROR: pdata_urb is NULL\n");
else {
if ((struct urb *)NULL != pdata_urb->purb) {
usb_free_urb(pdata_urb->purb);
pdata_urb->purb = (struct urb *)NULL;
peasycap->allocation_audio_urb -= 1;
m++;
}
}
}
JOT(4, "%i audio urbs freed\n", m);
/*---------------------------------------------------------------------------*/
JOT(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 ((struct data_urb *)NULL != pdata_urb) {
kfree(pdata_urb); pdata_urb = (struct data_urb *)NULL;
peasycap->allocation_audio_struct -= \
sizeof(struct data_urb);
m++;
}
}
JOT(4, "%i audio data_urb structures freed\n", m);
JOT(4, "setting peasycap->purb_audio_head=NULL\n");
peasycap->purb_audio_head = (struct list_head *)NULL;
} else {
JOT(4, "peasycap->purb_audio_head is NULL\n");
}
/*---------------------------------------------------------------------------*/
JOT(4, "freeing audio isoc buffers.\n");
m = 0;
for (k = 0; k < AUDIO_ISOC_BUFFER_MANY; k++) {
if ((void *)NULL != 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 = (void *)NULL;
peasycap->allocation_audio_page -= \
((unsigned int)(0x01 << AUDIO_ISOC_ORDER));
m++;
}
}
JOT(4, "easysnd_delete(): isoc audio buffers freed: %i pages\n", \
m * (0x01 << AUDIO_ISOC_ORDER));
/*---------------------------------------------------------------------------*/
JOT(4, "freeing audio buffers.\n");
lost = 0;
for (k = 0; k < peasycap->audio_buffer_page_many; k++) {
if ((void *)NULL != peasycap->audio_buffer[k].pgo) {
free_page((unsigned long)(peasycap->audio_buffer[k].pgo));
peasycap->audio_buffer[k].pgo = (void *)NULL;
peasycap->allocation_audio_page -= 1;
lost++;
}
}
JOT(4, "easysnd_delete(): audio buffers freed: %i pages\n", lost);
/*---------------------------------------------------------------------------*/
JOT(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;
m = 0;
if ((struct easycap *)NULL != peasycap) {
kfree(peasycap); peasycap = (struct easycap *)NULL;
allocation_video_struct -= sizeof(struct easycap);
m++;
}
JOT(4, "%i easycap structure freed\n", m);
/*---------------------------------------------------------------------------*/
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;
}
/*****************************************************************************/
unsigned int easycap_poll(struct file *file, poll_table *wait)
{
struct easycap *peasycap;
JOT(8, "\n");
if (NULL == ((poll_table *)wait))
JOT(8, "WARNING: poll table pointer is NULL ... continuing\n");
if (NULL == ((struct file *)file)) {
SAY("ERROR: file pointer is NULL\n");
return -EFAULT;
}
peasycap = file->private_data;
if (NULL == peasycap) {
SAY("ERROR: peasycap is NULL\n");
return -EFAULT;
}
peasycap->polled = 1;
if (0 == easycap_dqbuf(peasycap, 0))
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 miss, rc;
JOT(8, "\n");
if (NULL == peasycap) {
SAY("ERROR: peasycap is NULL\n");
return -EFAULT;
}
/*---------------------------------------------------------------------------*/
/*
* WAIT FOR FIELD 0
*/
/*---------------------------------------------------------------------------*/
miss = 0;
if (mutex_lock_interruptible(&(peasycap->mutex_mmap_video[0])))
return -ERESTARTSYS;
while ((peasycap->field_read == peasycap->field_fill) || \
(0 != (0xFF00 & peasycap->field_buffer\
[peasycap->field_read][0].kount)) || \
(0 != (0x00FF & peasycap->field_buffer\
[peasycap->field_read][0].kount))) {
mutex_unlock(&(peasycap->mutex_mmap_video[0]));
if (mode)
return -EAGAIN;
JOT(8, "first wait on wq_video, " \
"%i=field_read %i=field_fill\n", \
peasycap->field_read, peasycap->field_fill);
msleep(1);
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)) && \
(0 == (0x00FF & peasycap->field_buffer\
[peasycap->field_read][0].kount))))))){
SAY("aborted by signal\n");
return -EIO;
}
if (peasycap->video_idle) {
JOT(8, "%i=peasycap->video_idle\n", peasycap->video_idle);
return -EIO;
}
if (peasycap->video_eof) {
JOT(8, "%i=peasycap->video_eof\n", peasycap->video_eof);
debrief(peasycap);
kill_video_urbs(peasycap);
return -EIO;
}
miss++;
if (mutex_lock_interruptible(&(peasycap->mutex_mmap_video[0])))
return -ERESTARTSYS;
}
mutex_unlock(&(peasycap->mutex_mmap_video[0]));
JOT(8, "first awakening on wq_video after %i waits\n", miss);
rc = field2frame(peasycap);
if (0 != rc)
SAY("ERROR: field2frame() returned %i\n", rc);
if (true == peasycap->offerfields) {
peasycap->frame_read = peasycap->frame_fill;
(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_BOTTOM;
} else {
peasycap->frame_buffer[peasycap->frame_read][0].kount = \
V4L2_FIELD_TOP;
}
JOT(8, "setting: %i=peasycap->frame_read\n", peasycap->frame_read);
JOT(8, "bumped to: %i=peasycap->frame_fill\n", peasycap->frame_fill);
}
/*---------------------------------------------------------------------------*/
/*
* WAIT FOR FIELD 1
*/
/*---------------------------------------------------------------------------*/
miss = 0;
if (mutex_lock_interruptible(&(peasycap->mutex_mmap_video[0])))
return -ERESTARTSYS;
while ((peasycap->field_read == peasycap->field_fill) || \
(0 != (0xFF00 & peasycap->field_buffer\
[peasycap->field_read][0].kount)) || \
(0 == (0x00FF & peasycap->field_buffer\
[peasycap->field_read][0].kount))) {
mutex_unlock(&(peasycap->mutex_mmap_video[0]));
if (mode)
return -EAGAIN;
JOT(8, "second wait on wq_video, " \
"%i=field_read %i=field_fill\n", \
peasycap->field_read, peasycap->field_fill);
msleep(1);
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)) && \
(0 != (0x00FF & peasycap->field_buffer\
[peasycap->field_read][0].kount))))))){
SAY("aborted by signal\n");
return -EIO;
}
if (peasycap->video_idle) {
JOT(8, "%i=peasycap->video_idle\n", peasycap->video_idle);
return -EIO;
}
if (peasycap->video_eof) {
JOT(8, "%i=peasycap->video_eof\n", peasycap->video_eof);
debrief(peasycap);
kill_video_urbs(peasycap);
return -EIO;
}
miss++;
if (mutex_lock_interruptible(&(peasycap->mutex_mmap_video[0])))
return -ERESTARTSYS;
}
mutex_unlock(&(peasycap->mutex_mmap_video[0]));
JOT(8, "second awakening on wq_video after %i waits\n", miss);
rc = field2frame(peasycap);
if (0 != rc)
SAY("ERROR: field2frame() returned %i\n", rc);
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;
}
JOT(8, "setting: %i=peasycap->frame_read\n", peasycap->frame_read);
JOT(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_ALTERNATE. NO USERSPACE PROGRAM TESTED
* TO DATE HAS DONE THIS. BUGS ARE LIKELY.
*/
/*---------------------------------------------------------------------------*/
int
field2frame(struct easycap *peasycap)
{
static struct timeval timeval0;
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, much, more, over, rump, caches;
__u8 mask, margin;
bool odd, isuy, decimatepixel, offerfields;
JOT(8, "===== parity %i, field buffer %i --> frame buffer %i\n", \
peasycap->field_buffer[peasycap->field_read][0].kount,\
peasycap->field_read, peasycap->frame_fill);
JOT(8, "===== %i=bytesperpixel\n", peasycap->bytesperpixel);
if (true == peasycap->offerfields)
JOT(8, "===== offerfields\n");
/*---------------------------------------------------------------------------*/
/*
* REJECT OR CLEAN BAD FIELDS
*/
/*---------------------------------------------------------------------------*/
if (peasycap->field_read == peasycap->field_fill) {
SAY("ERROR: on entry, still filling field buffer %i\n", \
peasycap->field_read);
return 0;
}
#if defined(EASYCAP_TESTCARD)
easycap_testcard(peasycap, peasycap->field_read);
#else
if (0 != (0x0400 & peasycap->field_buffer[peasycap->field_read][0].kount))
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)) {
SAY("MISTAKE: %i=bytesperpixel\n", bytesperpixel);
return -EFAULT;
}
if (true == 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;
if (peasycap->field_buffer[kex][0].kount)
odd = true;
else
odd = false;
if ((true == odd) && (false == offerfields) &&(false == decimatepixel)) {
JOT(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 (false == decimatepixel) {
over = w2;
do {
much = over; more = 0; margin = 0; mask = 0x00;
if (rex < much)
much = rex;
rump = 0;
if (much % 2) {
SAY("MISTAKE: much is odd\n");
return -EFAULT;
}
more = (bytesperpixel * \
much) / 2;
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
if (1 < bytesperpixel) {
if ((rad * \
2) < (much * \
bytesperpixel)) {
/*
** INJUDICIOUS ALTERATION OF THIS
** 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 {
SAY("MISTAKE: %i=bytesperpixel\n", \
bytesperpixel);
return -EFAULT;
}
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
if (rump)
caches++;
rc = redaub(peasycap, pad, pex, much, more, \
mask, margin, isuy);
if (0 > rc) {
SAY("ERROR: redaub() failed\n");
return -EFAULT;
}
if (much % 4) {
if (isuy)
isuy = false;
else
isuy = true;
}
over -= much; cz += much;
pex += much; rex -= much;
if (!rex) {
mex++;
pex = peasycap->field_buffer[kex][mex].pgo;
rex = PAGE_SIZE;
}
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 (((false == odd) || (cz != wz))&&(false == offerfields)) {
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 (false == odd) {
over = w2;
do {
much = over; more = 0; margin = 0; mask = 0x00;
if (rex < much)
much = rex;
rump = 0;
if (much % 2) {
SAY("MISTAKE: much is odd\n");
return -EFAULT;
}
more = (bytesperpixel * \
much) / 4;
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
if (1 < bytesperpixel) {
if ((rad * 4) < (much * \
bytesperpixel)) {
/*
** INJUDICIOUS ALTERATION OF THIS
** 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 {
SAY("MISTAKE: %i=bytesperpixel\n", \
bytesperpixel);
return -EFAULT;
}
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
if (rump)
caches++;
rc = redaub(peasycap, pad, pex, much, more, \
mask, margin, isuy);
if (0 > rc) {
SAY("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;
}
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;
}
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)
SAY("ERROR: discrepancy %i in bytes read\n", c2 - cz);
c3 = (mad + 1)*PAGE_SIZE - rad;
if (false == decimatepixel) {
if (bytesperpixel * \
cz != c3) \
SAY("ERROR: discrepancy %i in bytes written\n", \
c3 - (bytesperpixel * \
cz));
} else {
if (false == odd) {
if (bytesperpixel * \
cz != (4 * c3))
SAY("ERROR: discrepancy %i in bytes written\n", \
(2*c3)-(bytesperpixel * \
cz));
} else {
if (0 != c3)
SAY("ERROR: discrepancy %i " \
"in bytes written\n", c3);
}
}
if (rump)
SAY("ERROR: undischarged cache at end of line in frame buffer\n");
JOT(8, "===== field2frame(): %i bytes --> %i bytes (incl skip)\n", c2, c3);
JOT(8, "===== field2frame(): %i=mad %i=rad\n", mad, rad);
if (true == odd)
JOT(8, "+++++ field2frame(): frame buffer %i is full\n", kad);
if (peasycap->field_read == peasycap->field_fill)
SAY("WARNING: on exit, filling field buffer %i\n", \
peasycap->field_read);
/*---------------------------------------------------------------------------*/
/*
* CALCULATE VIDEO STREAMING RATE
*/
/*---------------------------------------------------------------------------*/
do_gettimeofday(&timeval);
if (timeval0.tv_sec) {
below = ((long long int)(1000000)) * \
((long long int)(timeval.tv_sec - timeval0.tv_sec)) + \
(long long int)(timeval.tv_usec - timeval0.tv_usec);
above = (long long int)1000000;
sdr = signed_div(above, below);
above = sdr.quotient;
remainder = (__u32)sdr.remainder;
JOT(8, "video streaming at %3lli.%03i fields per second\n", above, \
(remainder/1000));
}
timeval0 = timeval;
if (caches)
JOT(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];
static __u8 cache[8], *pcache;
__u8 r, g, b, y, u, v, c, *p2, *p3, *pz, *pr;
int bytesperpixel;
bool byteswaporder, decimatepixel, last;
int j, rump;
__s32 s32;
if (much % 2) {
SAY("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++) {
s32 = (0xFF00 & (453 * j)) >> 8;
bu[j + 128] = s32; bu[127 - j] = -s32;
s32 = (0xFF00 & (359 * j)) >> 8;
rv[j + 128] = s32; rv[127 - j] = -s32;
s32 = (0xFF00 & (88 * j)) >> 8;
gu[j + 128] = s32; gu[127 - j] = -s32;
s32 = (0xFF00 & (183 * j)) >> 8;
gv[j + 128] = s32; gv[127 - j] = -s32;
}
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];
JOT(8, "lookup tables are prepared\n");
}
if ((__u8 *)NULL == pcache)
pcache = &cache[0];
/*---------------------------------------------------------------------------*/
/*
* TRANSFER CONTENTS OF CACHE TO THE FRAME BUFFER
*/
/*---------------------------------------------------------------------------*/
if (!pcache) {
SAY("MISTAKE: pcache is NULL\n");
return -EFAULT;
}
if (pcache != &cache[0])
JOT(16, "cache has %i bytes\n", (int)(pcache - &cache[0]));
p2 = &cache[0];
p3 = (__u8 *)pad - (int)(pcache - &cache[0]);
while (p2 < pcache) {
*p3++ = *p2; p2++;
}
pcache = &cache[0];
if (p3 != pad) {
SAY("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 (true == isuy)
u = *(p2 - 1);
else
v = *(p2 - 1);
if (rump)
JOT(16, "%4i=much %4i=more %i=rump\n", much, more, rump);
/*---------------------------------------------------------------------------*/
switch (bytesperpixel) {
case 2: {
if (false == decimatepixel) {
memcpy(pad, pex, (size_t)much);
if (false == 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 (false == 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 (false == decimatepixel) {
if (false == byteswaporder) {
/*---------------------------------------------------*/
/*
** RGB
**/
/*---------------------------------------------------*/
while (pz > p2) {
if (pr <= (p3 + bytesperpixel))
last = true;
else
last = false;
y = *p2;
if ((true == last) && (0x0C & mask)) {
if (0x04 & mask) {
if (true == isuy)
v = margin;
else
u = margin;
} else
if (0x08 & mask)
;
} else {
if (true == isuy)
v = *(p2 + 1);
else
u = *(p2 + 1);
}
s32 = ay[(int)y] + rv[(int)v];
r = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
s32 = ay[(int)y] - gu[(int)u] - gv[(int)v];
g = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
s32 = ay[(int)y] + bu[(int)u];
b = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
if ((true == last) && rump) {
pcache = &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: {
SAY("MISTAKE: %i=rump\n", \
bytesperpixel - rump);
return -EFAULT;
}
}
} else {
*p3 = r;
*(p3 + 1) = g;
*(p3 + 2) = b;
}
p2 += 2;
if (true == 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 ((true == last) && (0x0C & mask)) {
if (0x04 & mask) {
if (true == isuy)
v = margin;
else
u = margin;
}
else
if (0x08 & mask)
;
} else {
if (true == isuy)
v = *(p2 + 1);
else
u = *(p2 + 1);
}
s32 = ay[(int)y] + rv[(int)v];
r = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
s32 = ay[(int)y] - gu[(int)u] - gv[(int)v];
g = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
s32 = ay[(int)y] + bu[(int)u];
b = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
if ((true == last) && rump) {
pcache = &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: {
SAY("MISTAKE: %i=rump\n", \
bytesperpixel - rump);
return -EFAULT;
}
}
} else {
*p3 = b;
*(p3 + 1) = g;
*(p3 + 2) = r;
}
p2 += 2;
if (true == isuy)
isuy = false;
else
isuy = true;
p3 += bytesperpixel;
}
}
return 0;
} else {
if (false == byteswaporder) {
/*---------------------------------------------------*/
/*
** RGB DECIMATED
*/
/*---------------------------------------------------*/
while (pz > p2) {
if (pr <= (p3 + bytesperpixel))
last = true;
else
last = false;
y = *p2;
if ((true == last) && (0x0C & mask)) {
if (0x04 & mask) {
if (true == isuy)
v = margin;
else
u = margin;
} else
if (0x08 & mask)
;
} else {
if (true == isuy)
v = *(p2 + 1);
else
u = *(p2 + 1);
}
if (true == isuy) {
s32 = ay[(int)y] + rv[(int)v];
r = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
s32 = ay[(int)y] - gu[(int)u] - \
gv[(int)v];
g = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
s32 = ay[(int)y] + bu[(int)u];
b = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
if ((true == last) && rump) {
pcache = &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: {
SAY("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 ((true == last) && (0x0C & mask)) {
if (0x04 & mask) {
if (true == isuy)
v = margin;
else
u = margin;
} else
if (0x08 & mask)
;
} else {
if (true == isuy)
v = *(p2 + 1);
else
u = *(p2 + 1);
}
if (true == isuy) {
s32 = ay[(int)y] + rv[(int)v];
r = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
s32 = ay[(int)y] - gu[(int)u] - \
gv[(int)v];
g = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
s32 = ay[(int)y] + bu[(int)u];
b = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
if ((true == last) && rump) {
pcache = &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: {
SAY("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 (false == decimatepixel) {
if (false == byteswaporder) {
/*---------------------------------------------------*/
/*
** RGBA
*/
/*---------------------------------------------------*/
while (pz > p2) {
if (pr <= (p3 + bytesperpixel))
last = true;
else
last = false;
y = *p2;
if ((true == last) && (0x0C & mask)) {
if (0x04 & mask) {
if (true == isuy)
v = margin;
else
u = margin;
} else
if (0x08 & mask)
;
} else {
if (true == isuy)
v = *(p2 + 1);
else
u = *(p2 + 1);
}
s32 = ay[(int)y] + rv[(int)v];
r = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
s32 = ay[(int)y] - gu[(int)u] - gv[(int)v];
g = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
s32 = ay[(int)y] + bu[(int)u];
b = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
if ((true == last) && rump) {
pcache = &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: {
SAY("MISTAKE: %i=rump\n", \
bytesperpixel - rump);
return -EFAULT;
}
}
} else {
*p3 = r;
*(p3 + 1) = g;
*(p3 + 2) = b;
*(p3 + 3) = 0;
}
p2 += 2;
if (true == 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 ((true == last) && (0x0C & mask)) {
if (0x04 & mask) {
if (true == isuy)
v = margin;
else
u = margin;
} else
if (0x08 & mask)
;
} else {
if (true == isuy)
v = *(p2 + 1);
else
u = *(p2 + 1);
}
s32 = ay[(int)y] + rv[(int)v];
r = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
s32 = ay[(int)y] - gu[(int)u] - gv[(int)v];
g = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
s32 = ay[(int)y] + bu[(int)u];
b = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
if ((true == last) && rump) {
pcache = &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: {
SAY("MISTAKE: %i=rump\n", \
bytesperpixel - rump);
return -EFAULT;
}
}
} else {
*p3 = b;
*(p3 + 1) = g;
*(p3 + 2) = r;
*(p3 + 3) = 0;
}
p2 += 2;
if (true == isuy)
isuy = false;
else
isuy = true;
p3 += bytesperpixel;
}
}
return 0;
} else {
if (false == byteswaporder) {
/*---------------------------------------------------*/
/*
** RGBA DECIMATED
*/
/*---------------------------------------------------*/
while (pz > p2) {
if (pr <= (p3 + bytesperpixel))
last = true;
else
last = false;
y = *p2;
if ((true == last) && (0x0C & mask)) {
if (0x04 & mask) {
if (true == isuy)
v = margin;
else
u = margin;
} else
if (0x08 & mask)
;
} else {
if (true == isuy)
v = *(p2 + 1);
else
u = *(p2 + 1);
}
if (true == isuy) {
s32 = ay[(int)y] + rv[(int)v];
r = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
s32 = ay[(int)y] - gu[(int)u] - \
gv[(int)v];
g = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
s32 = ay[(int)y] + bu[(int)u];
b = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
if ((true == last) && rump) {
pcache = &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: {
SAY("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 ((true == last) && (0x0C & mask)) {
if (0x04 & mask) {
if (true == isuy)
v = margin;
else
u = margin;
} else
if (0x08 & mask)
;
} else {
if (true == isuy)
v = *(p2 + 1);
else
u = *(p2 + 1);
}
if (true == isuy) {
s32 = ay[(int)y] + rv[(int)v];
r = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
s32 = ay[(int)y] - gu[(int)u] - \
gv[(int)v];
g = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
s32 = ay[(int)y] + bu[(int)u];
b = (255 < s32) ? 255 : ((0 > s32) ? \
0 : (__u8)s32);
if ((true == last) && rump) {
pcache = &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: {
SAY("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: {
SAY("MISTAKE: %i=bytesperpixel\n", bytesperpixel);
return -EFAULT;
}
}
return 0;
}
/*****************************************************************************/
void
debrief(struct easycap *peasycap)
{
if ((struct usb_device *)NULL != peasycap->pusb_device) {
check_stk(peasycap->pusb_device);
check_saa(peasycap->pusb_device);
sayreadonly(peasycap);
SAY("%i=peasycap->field_fill\n", peasycap->field_fill);
SAY("%i=peasycap->field_read\n", peasycap->field_read);
SAY("%i=peasycap->frame_fill\n", peasycap->frame_fill);
SAY("%i=peasycap->frame_read\n", peasycap->frame_read);
}
return;
}
/*****************************************************************************/
void
sayreadonly(struct easycap *peasycap)
{
static int done;
int got00, got1F, got60, got61, got62;
if ((!done) && ((struct usb_device *)NULL != peasycap->pusb_device)) {
done = 1;
got00 = read_saa(peasycap->pusb_device, 0x00);
got1F = read_saa(peasycap->pusb_device, 0x1F);
got60 = read_saa(peasycap->pusb_device, 0x60);
got61 = read_saa(peasycap->pusb_device, 0x61);
got62 = read_saa(peasycap->pusb_device, 0x62);
SAY("0x%02X=reg0x00 0x%02X=reg0x1F\n", got00, got1F);
SAY("0x%02X=reg0x60 0x%02X=reg0x61 0x%02X=reg0x62\n", \
got60, got61, got62);
}
return;
}
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
/*
* SEE CORBET ET AL. "LINUX DEVICE DRIVERS", 3rd EDITION, PAGES 430-434
*/
/*---------------------------------------------------------------------------*/
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 (NULL != file)
pvma->vm_private_data = file->private_data;
easycap_vma_open(pvma);
return 0;
}
/*****************************************************************************/
void
easycap_vma_open(struct vm_area_struct *pvma)
{
struct easycap *peasycap;
peasycap = pvma->vm_private_data;
if (NULL != peasycap)
peasycap->vma_many++;
JOT(8, "%i=peasycap->vma_many\n", peasycap->vma_many);
return;
}
/*****************************************************************************/
void
easycap_vma_close(struct vm_area_struct *pvma)
{
struct easycap *peasycap;
peasycap = pvma->vm_private_data;
if (NULL != peasycap) {
peasycap->vma_many--;
JOT(8, "%i=peasycap->vma_many\n", peasycap->vma_many);
}
return;
}
/*****************************************************************************/
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;
pbuf = (void *)NULL;
page = (struct page *)NULL;
if (NULL == pvma) {
SAY("pvma is NULL\n");
return retcode;
}
if (NULL == 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 (NULL == peasycap) {
SAY("ERROR: peasycap is NULL\n");
return retcode;
}
mutex_lock(&(peasycap->mutex_mmap_video[0]));
/*---------------------------------------------------------------------------*/
pbuf = peasycap->frame_buffer[k][m].pgo;
if (NULL == pbuf) {
SAY("ERROR: pbuf is NULL\n");
goto finish;
}
page = virt_to_page(pbuf);
if (NULL == page) {
SAY("ERROR: page is NULL\n");
goto finish;
}
get_page(page);
/*---------------------------------------------------------------------------*/
finish:
mutex_unlock(&(peasycap->mutex_mmap_video[0]));
if (NULL == page) {
SAY("ERROR: page is NULL after get_page(page)\n");
} else {
pvmf->page = page;
retcode = VM_FAULT_MINOR;
}
return retcode;
}
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
/*
* ON COMPLETION OF A VIDEO URB ITS DATA IS COPIED TO THE FIELD BUFFERS
* PROVIDED peasycap->video_idle IS ZER0. 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 & 0x0400) => FIELD WAS SUBMITTED BY BRIDGER ROUTINE
* 0 != (kount & 0x0200) => FIELD BUFFER NOT YET CHECKED
* 0 != (kount & 0x0100) => BUFFER HAS TWO EXTRA BYTES - WHY?
*/
/*---------------------------------------------------------------------------*/
void
easycap_complete(struct urb *purb)
{
static int mt;
struct easycap *peasycap;
struct data_buffer *pfield_buffer;
char errbuf[16];
int i, more, much, leap, rc, last;
int videofieldamount;
unsigned int override;
int framestatus, framelength, frameactual, frameoffset;
__u8 *pu;
#if defined(BRIDGER)
struct timeval timeval;
long long usec;
#endif /*BRIDGER*/
if (NULL == purb) {
SAY("ERROR: easycap_complete(): purb is NULL\n");
return;
}
peasycap = purb->context;
if (NULL == peasycap) {
SAY("ERROR: easycap_complete(): peasycap is NULL\n");
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;
JOT(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))) {
SAY("ERROR: out-of-order urbs %i,%i ... continuing\n", last, i);
}
peasycap->video_isoc_sequence = i;
if (peasycap->video_idle) {
JOT(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 (0 != rc) {
SAY("ERROR: while %i=video_idle, " \
"usb_submit_urb() failed with rc:\n", \
peasycap->video_idle);
switch (rc) {
case -ENOMEM: {
SAY("ENOMEM\n");
break;
}
case -ENODEV: {
SAY("ENODEV\n");
break;
}
case -ENXIO: {
SAY("ENXIO\n");
break;
}
case -EINVAL: {
SAY("EINVAL\n");
break;
}
case -EAGAIN: {
SAY("EAGAIN\n");
break;
}
case -EFBIG: {
SAY("EFBIG\n");
break;
}
case -EPIPE: {
SAY("EPIPE\n");
break;
}
case -EMSGSIZE: {
SAY("EMSGSIZE\n");
break;
}
case -ENOSPC: {
SAY("ENOSPC\n");
break;
}
default: {
SAY("0x%08X\n", rc);
break;
}
}
}
}
return;
}
override = 0;
/*---------------------------------------------------------------------------*/
if (FIELD_BUFFER_MANY <= peasycap->field_fill) {
SAY("ERROR: bad peasycap->field_fill\n");
return;
}
if (purb->status) {
if ((-ESHUTDOWN == purb->status) || (-ENOENT == purb->status)) {
JOT(8, "urb status -ESHUTDOWN or -ENOENT\n");
return;
}
(peasycap->field_buffer[peasycap->field_fill][0].kount) |= 0x8000 ;
SAY("ERROR: bad urb status:\n");
switch (purb->status) {
case -EINPROGRESS: {
SAY("-EINPROGRESS\n"); break;
}
case -ENOSR: {
SAY("-ENOSR\n"); break;
}
case -EPIPE: {
SAY("-EPIPE\n"); break;
}
case -EOVERFLOW: {
SAY("-EOVERFLOW\n"); break;
}
case -EPROTO: {
SAY("-EPROTO\n"); break;
}
case -EILSEQ: {
SAY("-EILSEQ\n"); break;
}
case -ETIMEDOUT: {
SAY("-ETIMEDOUT\n"); break;
}
case -EMSGSIZE: {
SAY("-EMSGSIZE\n"); break;
}
case -EOPNOTSUPP: {
SAY("-EOPNOTSUPP\n"); break;
}
case -EPFNOSUPPORT: {
SAY("-EPFNOSUPPORT\n"); break;
}
case -EAFNOSUPPORT: {
SAY("-EAFNOSUPPORT\n"); break;
}
case -EADDRINUSE: {
SAY("-EADDRINUSE\n"); break;
}
case -EADDRNOTAVAIL: {
SAY("-EADDRNOTAVAIL\n"); break;
}
case -ENOBUFS: {
SAY("-ENOBUFS\n"); break;
}
case -EISCONN: {
SAY("-EISCONN\n"); break;
}
case -ENOTCONN: {
SAY("-ENOTCONN\n"); break;
}
case -ESHUTDOWN: {
SAY("-ESHUTDOWN\n"); break;
}
case -ENOENT: {
SAY("-ENOENT\n"); break;
}
case -ECONNRESET: {
SAY("-ECONNRESET\n"); break;
}
case -ENOSPC: {
SAY("ENOSPC\n"); break;
}
default: {
SAY("unknown error code 0x%08X\n", purb->status); break;
}
}
/*---------------------------------------------------------------------------*/
} 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 ;
switch (purb->iso_frame_desc[i].status) {
case 0: {
strcpy(&errbuf[0], "OK"); break;
}
case -ENOENT: {
strcpy(&errbuf[0], "-ENOENT"); break;
}
case -EINPROGRESS: {
strcpy(&errbuf[0], "-EINPROGRESS"); break;
}
case -EPROTO: {
strcpy(&errbuf[0], "-EPROTO"); break;
}
case -EILSEQ: {
strcpy(&errbuf[0], "-EILSEQ"); break;
}
case -ETIME: {
strcpy(&errbuf[0], "-ETIME"); break;
}
case -ETIMEDOUT: {
strcpy(&errbuf[0], "-ETIMEDOUT"); break;
}
case -EPIPE: {
strcpy(&errbuf[0], "-EPIPE"); break;
}
case -ECOMM: {
strcpy(&errbuf[0], "-ECOMM"); break;
}
case -ENOSR: {
strcpy(&errbuf[0], "-ENOSR"); break;
}
case -EOVERFLOW: {
strcpy(&errbuf[0], "-EOVERFLOW"); break;
}
case -EREMOTEIO: {
strcpy(&errbuf[0], "-EREMOTEIO"); break;
}
case -ENODEV: {
strcpy(&errbuf[0], "-ENODEV"); break;
}
case -EXDEV: {
strcpy(&errbuf[0], "-EXDEV"); break;
}
case -EINVAL: {
strcpy(&errbuf[0], "-EINVAL"); break;
}
case -ECONNRESET: {
strcpy(&errbuf[0], "-ECONNRESET"); break;
}
case -ENOSPC: {
SAY("ENOSPC\n"); break;
}
case -ESHUTDOWN: {
strcpy(&errbuf[0], "-ESHUTDOWN"); break;
}
default: {
strcpy(&errbuf[0], "unknown error"); break;
}
}
}
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;
JOT(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)
mt++;
if (4 < more) {
if (mt) {
JOT(8, "%4i empty video urb frames\n", mt);
mt = 0;
}
if (FIELD_BUFFER_MANY <= peasycap->field_fill) {
SAY("ERROR: bad peasycap->field_fill\n");
return;
}
if (FIELD_BUFFER_SIZE/PAGE_SIZE <= \
peasycap->field_page) {
SAY("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;
else
(peasycap->field_buffer\
[peasycap->field_fill]\
[0].kount) |= 0x4000;
} else if (videofieldamount < \
peasycap->\
videofieldamount) {
(peasycap->field_buffer\
[peasycap->field_fill]\
[0].kount) |= 0x2000;
}
if (!(0xFF00 & peasycap->field_buffer\
[peasycap->field_fill]\
[0].kount)) {
(peasycap->video_junk)--;
if (-16 > peasycap->video_junk)
peasycap->video_junk = -16;
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;
JOT(8, "bumped to: %i=peasycap->" \
"field_fill %i=parity\n", \
peasycap->field_fill, \
0x00FF & pfield_buffer->kount);
JOT(8, "field buffer %i has %i " \
"bytes fit to be read\n", \
peasycap->field_read, \
videofieldamount);
JOT(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++;
JOT(8, "field buffer %i had %i " \
"bytes, now discarded\n", \
peasycap->field_fill, \
videofieldamount);
(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;
JOT(8, "bumped to: %i=peasycap->" \
"field_fill %i=parity\n", \
peasycap->field_fill, \
0x00FF & pfield_buffer->kount);
}
if (8 == more) {
JOT(8, "end-of-field: received " \
"parity byte 0x%02X\n", \
(0xFF & *pu));
if (0x40 & *pu)
pfield_buffer->kount = 0x0000;
else
pfield_buffer->kount = 0x0001;
JOT(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) {
SAY("ERROR: bad peasycap->field_fill\n");
return;
}
if (FIELD_BUFFER_SIZE/PAGE_SIZE <= \
peasycap->field_page) {
SAY("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)) {
SAY("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) {
JOT(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;
}
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;
}
}
}
}
}
/*---------------------------------------------------------------------------*/
/*
*
*
* *** UNDER DEVELOPMENT/TESTING - NOT READY YET! ***
*
*
*
* VIDEOTAPES MAY HAVE BEEN MANUALLY PAUSED AND RESTARTED DURING RECORDING.
* THIS CAUSES LOSS OF SYNC, CONFUSING DOWNSTREAM USERSPACE PROGRAMS WHICH
* MAY INTERPRET THE INTERRUPTION AS A SYMPTOM OF LATENCY. TO OVERCOME THIS
* THE DRIVER BRIDGES THE HIATUS BY SENDING DUMMY VIDEO FRAMES AT ROUGHLY
* THE RIGHT TIME INTERVALS IN THE HOPE OF PERSUADING THE DOWNSTREAM USERSPACE
* PROGRAM TO RESUME NORMAL SERVICE WHEN THE INTERRUPTION IS OVER.
*/
/*---------------------------------------------------------------------------*/
#if defined(BRIDGER)
do_gettimeofday(&timeval);
if (peasycap->timeval7.tv_sec) {
usec = 1000000*(timeval.tv_sec - peasycap->timeval7.tv_sec) + \
(timeval.tv_usec - peasycap->timeval7.tv_usec);
if (usec > (peasycap->usec + peasycap->tolerate)) {
JOT(8, "bridging hiatus\n");
peasycap->video_junk = 0;
peasycap->field_buffer[peasycap->field_fill][0].kount |= 0x0400;
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;
JOT(8, "bumped to: %i=peasycap->field_fill %i=parity\n", \
peasycap->field_fill, 0x00FF & pfield_buffer->kount);
JOT(8, "field buffer %i has %i bytes to be overwritten\n", \
peasycap->field_read, videofieldamount);
JOT(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);
}
}
#endif /*BRIDGER*/
/*---------------------------------------------------------------------------*/
/*
* 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) {
SAY("easycap driver shutting down on condition green\n");
peasycap->video_eof = 1;
peasycap->audio_eof = 1;
peasycap->video_junk = -VIDEO_ISOC_BUFFER_MANY;
wake_up_interruptible(&(peasycap->wq_video));
wake_up_interruptible(&(peasycap->wq_audio));
return;
}
if (peasycap->video_isoc_streaming) {
rc = usb_submit_urb(purb, GFP_ATOMIC);
if (0 != rc) {
SAY("ERROR: while %i=video_idle, usb_submit_urb() failed " \
"with rc:\n", peasycap->video_idle);
switch (rc) {
case -ENOMEM: {
SAY("ENOMEM\n"); break;
}
case -ENODEV: {
SAY("ENODEV\n"); break;
}
case -ENXIO: {
SAY("ENXIO\n"); break;
}
case -EINVAL: {
SAY("EINVAL\n"); break;
}
case -EAGAIN: {
SAY("EAGAIN\n"); break;
}
case -EFBIG: {
SAY("EFBIG\n"); break;
}
case -EPIPE: {
SAY("EPIPE\n"); break;
}
case -EMSGSIZE: {
SAY("EMSGSIZE\n"); break;
}
case -ENOSPC: {
SAY("ENOSPC\n"); break;
}
default: {
SAY("0x%08X\n", rc); break;
}
}
}
}
return;
}
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
/*
*
* FIXME
*
*
* THIS FUNCTION ASSUMES THAT, ON EACH AND EVERY OCCASION THAT THE DEVICE IS
* PHYSICALLY PLUGGED IN, INTERFACE 0 IS PROBED FIRST.
* IF THIS IS NOT TRUE, THERE IS THE POSSIBILITY OF AN Oops.
*
* THIS HAS NEVER BEEN A PROBLEM IN PRACTICE, BUT SOMETHING SEEMS WRONG HERE.
*/
/*---------------------------------------------------------------------------*/
int
easycap_usb_probe(struct usb_interface *pusb_interface, \
const struct usb_device_id *id)
{
struct usb_device *pusb_device, *pusb_device1;
struct usb_host_interface *pusb_host_interface;
struct usb_endpoint_descriptor *pepd;
struct usb_interface_descriptor *pusb_interface_descriptor;
struct usb_interface_assoc_descriptor *pusb_interface_assoc_descriptor;
struct urb *purb;
static struct easycap *peasycap /*=NULL*/;
struct data_urb *pdata_urb;
size_t wMaxPacketSize;
int ISOCwMaxPacketSize;
int BULKwMaxPacketSize;
int INTwMaxPacketSize;
int CTRLwMaxPacketSize;
__u8 bEndpointAddress;
__u8 ISOCbEndpointAddress;
__u8 INTbEndpointAddress;
int isin, i, j, k, m;
__u8 bInterfaceNumber;
__u8 bInterfaceClass;
__u8 bInterfaceSubClass;
void *pbuf;
int okalt[8], isokalt;
int okepn[8], isokepn;
int okmps[8], isokmps;
int maxpacketsize;
int rc;
JOT(4, "\n");
if ((struct usb_interface *)NULL == pusb_interface) {
SAY("ERROR: pusb_interface is NULL\n");
return -EFAULT;
}
/*---------------------------------------------------------------------------*/
/*
* GET POINTER TO STRUCTURE usb_device
*/
/*---------------------------------------------------------------------------*/
pusb_device1 = container_of(pusb_interface->dev.parent, \
struct usb_device, dev);
if ((struct usb_device *)NULL == pusb_device1) {
SAY("ERROR: pusb_device1 is NULL\n");
return -EFAULT;
}
pusb_device = usb_get_dev(pusb_device1);
if ((struct usb_device *)NULL == pusb_device) {
SAY("ERROR: pusb_device is NULL\n");
return -EFAULT;
}
if ((unsigned long int)pusb_device1 != (unsigned long int)pusb_device) {
JOT(4, "ERROR: pusb_device1 != pusb_device\n");
return -EFAULT;
}
JOT(4, "bNumConfigurations=%i\n", pusb_device->descriptor.bNumConfigurations);
/*---------------------------------------------------------------------------*/
pusb_host_interface = pusb_interface->cur_altsetting;
if (NULL == pusb_host_interface) {
SAY("ERROR: pusb_host_interface is NULL\n");
return -EFAULT;
}
pusb_interface_descriptor = &(pusb_host_interface->desc);
if (NULL == pusb_interface_descriptor) {
SAY("ERROR: pusb_interface_descriptor is NULL\n");
return -EFAULT;
}
/*---------------------------------------------------------------------------*/
/*
* GET PROPERTIES OF PROBED INTERFACE
*/
/*---------------------------------------------------------------------------*/
bInterfaceNumber = pusb_interface_descriptor->bInterfaceNumber;
bInterfaceClass = pusb_interface_descriptor->bInterfaceClass;
bInterfaceSubClass = pusb_interface_descriptor->bInterfaceSubClass;
JOT(4, "intf[%i]: pusb_interface->num_altsetting=%i\n", \
bInterfaceNumber, pusb_interface->num_altsetting);
JOT(4, "intf[%i]: pusb_interface->cur_altsetting - " \
"pusb_interface->altsetting=%li\n", bInterfaceNumber, \
(long int)(pusb_interface->cur_altsetting - \
pusb_interface->altsetting));
switch (bInterfaceClass) {
case USB_CLASS_AUDIO: {
JOT(4, "intf[%i]: bInterfaceClass=0x%02X=USB_CLASS_AUDIO\n", \
bInterfaceNumber, bInterfaceClass); break;
}
case USB_CLASS_VIDEO: {
JOT(4, "intf[%i]: bInterfaceClass=0x%02X=USB_CLASS_VIDEO\n", \
bInterfaceNumber, bInterfaceClass); break;
}
case USB_CLASS_VENDOR_SPEC: {
JOT(4, "intf[%i]: bInterfaceClass=0x%02X=USB_CLASS_VENDOR_SPEC\n", \
bInterfaceNumber, bInterfaceClass); break;
}
default:
break;
}
switch (bInterfaceSubClass) {
case 0x01: {
JOT(4, "intf[%i]: bInterfaceSubClass=0x%02X=AUDIOCONTROL\n", \
bInterfaceNumber, bInterfaceSubClass); break;
}
case 0x02: {
JOT(4, "intf[%i]: bInterfaceSubClass=0x%02X=AUDIOSTREAMING\n", \
bInterfaceNumber, bInterfaceSubClass); break;
}
case 0x03: {
JOT(4, "intf[%i]: bInterfaceSubClass=0x%02X=MIDISTREAMING\n", \
bInterfaceNumber, bInterfaceSubClass); break;
}
default:
break;
}
/*---------------------------------------------------------------------------*/
pusb_interface_assoc_descriptor = pusb_interface->intf_assoc;
if (NULL != pusb_interface_assoc_descriptor) {
JOT(4, "intf[%i]: bFirstInterface=0x%02X bInterfaceCount=0x%02X\n", \
bInterfaceNumber, \
pusb_interface_assoc_descriptor->bFirstInterface, \
pusb_interface_assoc_descriptor->bInterfaceCount);
} else {
JOT(4, "intf[%i]: pusb_interface_assoc_descriptor is NULL\n", \
bInterfaceNumber);
}
/*---------------------------------------------------------------------------*/
/*
* 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 DEVICE WAS PHYSICALLY
* UNPLUGGED.
*/
/*---------------------------------------------------------------------------*/
if (0 == bInterfaceNumber) {
peasycap = kzalloc(sizeof(struct easycap), GFP_KERNEL);
if (NULL == peasycap) {
SAY("ERROR: Could not allocate peasycap\n");
return -ENOMEM;
} else {
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;
}
/*---------------------------------------------------------------------------*/
/*
* INITIALIZE THE NEW easycap STRUCTURE.
* NO PARAMETERS ARE SPECIFIED HERE REQUIRING THE SETTING OF REGISTERS.
* THAT IS DONE FIRST BY easycap_open() AND LATER BY easycap_ioctl().
*/
/*---------------------------------------------------------------------------*/
peasycap->pusb_device = pusb_device;
peasycap->pusb_interface = pusb_interface;
kref_init(&peasycap->kref);
JOT(8, "intf[%i]: after kref_init(..._video) " \
"%i=peasycap->kref.refcount.counter\n", \
bInterfaceNumber, peasycap->kref.refcount.counter);
init_waitqueue_head(&(peasycap->wq_video));
init_waitqueue_head(&(peasycap->wq_audio));
mutex_init(&(peasycap->mutex_timeval0));
mutex_init(&(peasycap->mutex_timeval1));
for (k = 0; k < FRAME_BUFFER_MANY; k++)
mutex_init(&(peasycap->mutex_mmap_video[k]));
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;
if ((struct mutex *)NULL == &(peasycap->mutex_mmap_video[0])) {
SAY("ERROR: &(peasycap->mutex_mmap_video[%i]) is NULL\n", 0);
return -EFAULT;
}
/*---------------------------------------------------------------------------*/
/*
* DYNAMICALLY FILL IN THE AVAILABLE FORMATS.
*/
/*---------------------------------------------------------------------------*/
rc = fillin_formats();
if (0 > rc) {
SAY("ERROR: fillin_formats() returned %i\n", rc);
return -EFAULT;
}
JOT(4, "%i formats available\n", rc);
} else {
/*---------------------------------------------------------------------------*/
if ((struct easycap *)NULL == peasycap) {
SAY("ERROR: peasycap is NULL " \
"when probing interface %i\n", \
bInterfaceNumber);
return -EFAULT;
}
JOT(8, "kref_get() with %i=peasycap->kref.refcount.counter\n", \
(int)peasycap->kref.refcount.counter);
kref_get(&peasycap->kref);
}
/*---------------------------------------------------------------------------*/
if ((USB_CLASS_VIDEO == bInterfaceClass) || \
(USB_CLASS_VENDOR_SPEC == bInterfaceClass)) {
if (-1 == peasycap->video_interface) {
peasycap->video_interface = bInterfaceNumber;
JOT(4, "setting peasycap->video_interface=%i\n", \
peasycap->video_interface);
} else {
if (peasycap->video_interface != bInterfaceNumber) {
SAY("ERROR: attempting to reset " \
"peasycap->video_interface\n");
SAY("...... continuing with " \
"%i=peasycap->video_interface\n", \
peasycap->video_interface);
}
}
} else if ((USB_CLASS_AUDIO == bInterfaceClass) && \
(0x02 == bInterfaceSubClass)) {
if (-1 == peasycap->audio_interface) {
peasycap->audio_interface = bInterfaceNumber;
JOT(4, "setting peasycap->audio_interface=%i\n", \
peasycap->audio_interface);
} else {
if (peasycap->audio_interface != bInterfaceNumber) {
SAY("ERROR: attempting to reset " \
"peasycap->audio_interface\n");
SAY("...... 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;
isokepn = 0;
isokmps = 0;
for (i = 0; i < pusb_interface->num_altsetting; i++) {
pusb_host_interface = &(pusb_interface->altsetting[i]);
if ((struct usb_host_interface *)NULL == pusb_host_interface) {
SAY("ERROR: pusb_host_interface is NULL\n");
return -EFAULT;
}
pusb_interface_descriptor = &(pusb_host_interface->desc);
if ((struct usb_interface_descriptor *)NULL == \
pusb_interface_descriptor) {
SAY("ERROR: pusb_interface_descriptor is NULL\n");
return -EFAULT;
}
JOT(4, "intf[%i]alt[%i]: desc.bDescriptorType=0x%02X\n", \
bInterfaceNumber, i, pusb_interface_descriptor->bDescriptorType);
JOT(4, "intf[%i]alt[%i]: desc.bInterfaceNumber=0x%02X\n", \
bInterfaceNumber, i, pusb_interface_descriptor->bInterfaceNumber);
JOT(4, "intf[%i]alt[%i]: desc.bAlternateSetting=0x%02X\n", \
bInterfaceNumber, i, pusb_interface_descriptor->bAlternateSetting);
JOT(4, "intf[%i]alt[%i]: desc.bNumEndpoints=0x%02X\n", \
bInterfaceNumber, i, pusb_interface_descriptor->bNumEndpoints);
JOT(4, "intf[%i]alt[%i]: desc.bInterfaceClass=0x%02X\n", \
bInterfaceNumber, i, pusb_interface_descriptor->bInterfaceClass);
JOT(4, "intf[%i]alt[%i]: desc.bInterfaceSubClass=0x%02X\n", \
bInterfaceNumber, i, pusb_interface_descriptor->bInterfaceSubClass);
JOT(4, "intf[%i]alt[%i]: desc.bInterfaceProtocol=0x%02X\n", \
bInterfaceNumber, i, pusb_interface_descriptor->bInterfaceProtocol);
JOT(4, "intf[%i]alt[%i]: desc.iInterface=0x%02X\n", \
bInterfaceNumber, i, pusb_interface_descriptor->iInterface);
ISOCwMaxPacketSize = -1;
BULKwMaxPacketSize = -1;
INTwMaxPacketSize = -1;
CTRLwMaxPacketSize = -1;
ISOCbEndpointAddress = 0;
INTbEndpointAddress = 0;
if (0 == pusb_interface_descriptor->bNumEndpoints)
JOT(4, "intf[%i]alt[%i] has no endpoints\n", \
bInterfaceNumber, i);
/*---------------------------------------------------------------------------*/
for (j = 0; j < pusb_interface_descriptor->bNumEndpoints; j++) {
pepd = &(pusb_host_interface->endpoint[j].desc);
if ((struct usb_endpoint_descriptor *)NULL == pepd) {
SAY("ERROR: pepd is NULL.\n");
SAY("...... skipping\n");
continue;
}
wMaxPacketSize = le16_to_cpu(pepd->wMaxPacketSize);
bEndpointAddress = pepd->bEndpointAddress;
JOT(4, "intf[%i]alt[%i]end[%i]: bEndpointAddress=0x%X\n", \
bInterfaceNumber, i, j, \
pepd->bEndpointAddress);
JOT(4, "intf[%i]alt[%i]end[%i]: bmAttributes=0x%X\n", \
bInterfaceNumber, i, j, \
pepd->bmAttributes);
JOT(4, "intf[%i]alt[%i]end[%i]: wMaxPacketSize=%i\n", \
bInterfaceNumber, i, j, \
pepd->wMaxPacketSize);
JOT(4, "intf[%i]alt[%i]end[%i]: bInterval=%i\n",
bInterfaceNumber, i, j, \
pepd->bInterval);
if (pepd->bEndpointAddress & USB_DIR_IN) {
JOT(4, "intf[%i]alt[%i]end[%i] is an IN endpoint\n",\
bInterfaceNumber, i, j);
isin = 1;
} else {
JOT(4, "intf[%i]alt[%i]end[%i] is an OUT endpoint\n",\
bInterfaceNumber, i, j);
SAY("ERROR: OUT endpoint unexpected\n");
SAY("...... continuing\n");
isin = 0;
}
if ((pepd->bmAttributes & \
USB_ENDPOINT_XFERTYPE_MASK) == \
USB_ENDPOINT_XFER_ISOC) {
JOT(4, "intf[%i]alt[%i]end[%i] is an ISOC endpoint\n",\
bInterfaceNumber, i, j);
if (isin) {
switch (bInterfaceClass) {
case USB_CLASS_VIDEO:
case USB_CLASS_VENDOR_SPEC: {
if (!peasycap) {
SAY("MISTAKE: " \
"peasycap is NULL\n");
return -EFAULT;
}
if (pepd->wMaxPacketSize) {
if (8 > isokalt) {
okalt[isokalt] = i;
JOT(4,\
"%i=okalt[%i]\n", \
okalt[isokalt], \
isokalt);
isokalt++;
}
if (8 > isokepn) {
okepn[isokepn] = \
pepd->\
bEndpointAddress & \
0x0F;
JOT(4,\
"%i=okepn[%i]\n", \
okepn[isokepn], \
isokepn);
isokepn++;
}
if (8 > isokmps) {
okmps[isokmps] = \
le16_to_cpu(pepd->\
wMaxPacketSize);
JOT(4,\
"%i=okmps[%i]\n", \
okmps[isokmps], \
isokmps);
isokmps++;
}
} else {
if (-1 == peasycap->\
video_altsetting_off) {
peasycap->\
video_altsetting_off =\
i;
JOT(4, "%i=video_" \
"altsetting_off " \
"<====\n", \
peasycap->\
video_altsetting_off);
} else {
SAY("ERROR: peasycap" \
"->video_altsetting_" \
"off already set\n");
SAY("...... " \
"continuing with " \
"%i=peasycap->video_" \
"altsetting_off\n", \
peasycap->\
video_altsetting_off);
}
}
break;
}
case USB_CLASS_AUDIO: {
if (0x02 != bInterfaceSubClass)
break;
if (!peasycap) {
SAY("MISTAKE: " \
"peasycap is NULL\n");
return -EFAULT;
}
if (pepd->wMaxPacketSize) {
if (8 > isokalt) {
okalt[isokalt] = i ;
JOT(4,\
"%i=okalt[%i]\n", \
okalt[isokalt], \
isokalt);
isokalt++;
}
if (8 > isokepn) {
okepn[isokepn] = \
pepd->\
bEndpointAddress & \
0x0F;
JOT(4,\
"%i=okepn[%i]\n", \
okepn[isokepn], \
isokepn);
isokepn++;
}
if (8 > isokmps) {
okmps[isokmps] = \
le16_to_cpu(pepd->\
wMaxPacketSize);
JOT(4,\
"%i=okmps[%i]\n",\
okmps[isokmps], \
isokmps);
isokmps++;
}
} else {
if (-1 == peasycap->\
audio_altsetting_off) {
peasycap->\
audio_altsetting_off =\
i;
JOT(4, "%i=audio_" \
"altsetting_off " \
"<====\n", \
peasycap->\
audio_altsetting_off);
} else {
SAY("ERROR: peasycap" \
"->audio_altsetting_" \
"off already set\n");
SAY("...... " \
"continuing with " \
"%i=peasycap->\
audio_altsetting_" \
"off\n",
peasycap->\
audio_altsetting_off);
}
}
break;
}
default:
break;
}
}
} else if ((pepd->bmAttributes & \
USB_ENDPOINT_XFERTYPE_MASK) ==\
USB_ENDPOINT_XFER_BULK) {
JOT(4, "intf[%i]alt[%i]end[%i] is a BULK endpoint\n",\
bInterfaceNumber, i, j);
} else if ((pepd->bmAttributes & \
USB_ENDPOINT_XFERTYPE_MASK) ==\
USB_ENDPOINT_XFER_INT) {
JOT(4, "intf[%i]alt[%i]end[%i] is an INT endpoint\n",\
bInterfaceNumber, i, j);
} else {
JOT(4, "intf[%i]alt[%i]end[%i] is a CTRL endpoint\n",\
bInterfaceNumber, i, j);
}
if (0 == pepd->wMaxPacketSize) {
JOT(4, "intf[%i]alt[%i]end[%i] " \
"has zero packet size\n", \
bInterfaceNumber, i, j);
}
}
}
/*---------------------------------------------------------------------------*/
/*
* PERFORM INITIALIZATION OF THE PROBED INTERFACE
*/
/*---------------------------------------------------------------------------*/
JOT(4, "initialization begins for interface %i\n", \
pusb_interface_descriptor->bInterfaceNumber);
switch (bInterfaceNumber) {
/*---------------------------------------------------------------------------*/
/*
* INTERFACE 0 IS THE VIDEO INTERFACE
*/
/*---------------------------------------------------------------------------*/
case 0: {
if (!peasycap) {
SAY("MISTAKE: peasycap is NULL\n");
return -EFAULT;
}
if (!isokalt) {
SAY("ERROR: no viable video_altsetting_on\n");
return -ENOENT;
} else {
peasycap->video_altsetting_on = okalt[isokalt - 1];
JOT(4, "%i=video_altsetting_on <====\n", \
peasycap->video_altsetting_on);
}
if (!isokepn) {
SAY("ERROR: no viable video_endpointnumber\n");
return -ENOENT;
} else {
peasycap->video_endpointnumber = okepn[isokepn - 1];
JOT(4, "%i=video_endpointnumber\n", \
peasycap->video_endpointnumber);
}
if (!isokmps) {
SAY("ERROR: no viable video_maxpacketsize\n");
return -ENOENT;
/*---------------------------------------------------------------------------*/
/*
* DECIDE THE VIDEO STREAMING PARAMETERS
*/
/*---------------------------------------------------------------------------*/
} else {
maxpacketsize = okmps[isokmps - 1] - 1024;
if (USB_2_0_MAXPACKETSIZE > maxpacketsize) {
peasycap->video_isoc_maxframesize = maxpacketsize;
} else {
peasycap->video_isoc_maxframesize = \
USB_2_0_MAXPACKETSIZE;
}
JOT(4, "%i=video_isoc_maxframesize\n", \
peasycap->video_isoc_maxframesize);
if (0 >= peasycap->video_isoc_maxframesize) {
SAY("ERROR: bad video_isoc_maxframesize\n");
return -ENOENT;
}
peasycap->video_isoc_framesperdesc = VIDEO_ISOC_FRAMESPERDESC;
JOT(4, "%i=video_isoc_framesperdesc\n", \
peasycap->video_isoc_framesperdesc);
if (0 >= peasycap->video_isoc_framesperdesc) {
SAY("ERROR: bad video_isoc_framesperdesc\n");
return -ENOENT;
}
peasycap->video_isoc_buffer_size = \
peasycap->video_isoc_maxframesize * \
peasycap->video_isoc_framesperdesc;
JOT(4, "%i=video_isoc_buffer_size\n", \
peasycap->video_isoc_buffer_size);
if ((PAGE_SIZE << VIDEO_ISOC_ORDER) < \
peasycap->video_isoc_buffer_size) {
SAY("MISTAKE: " \
"peasycap->video_isoc_buffer_size too big\n");
return -EFAULT;
}
}
/*---------------------------------------------------------------------------*/
if (-1 == peasycap->video_interface) {
SAY("MISTAKE: video_interface is unset\n");
return -EFAULT;
}
if (-1 == peasycap->video_altsetting_on) {
SAY("MISTAKE: video_altsetting_on is unset\n");
return -EFAULT;
}
if (-1 == peasycap->video_altsetting_off) {
SAY("MISTAKE: video_interface_off is unset\n");
return -EFAULT;
}
if (-1 == peasycap->video_endpointnumber) {
SAY("MISTAKE: video_endpointnumber is unset\n");
return -EFAULT;
}
if (-1 == peasycap->video_isoc_maxframesize) {
SAY("MISTAKE: video_isoc_maxframesize is unset\n");
return -EFAULT;
}
if (-1 == peasycap->video_isoc_buffer_size) {
SAY("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);
/*---------------------------------------------------------------------------*/
JOT(4, "allocating %i frame buffers of size %li\n", \
FRAME_BUFFER_MANY, (long int)FRAME_BUFFER_SIZE);
JOT(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 ((void *)NULL != peasycap->frame_buffer[k][m].pgo)
SAY("attempting to reallocate frame " \
" buffers\n");
else {
pbuf = (void *)__get_free_page(GFP_KERNEL);
if ((void *)NULL == pbuf) {
SAY("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;
JOT(4, "allocation of frame buffers done: %i pages\n", k * \
m);
/*---------------------------------------------------------------------------*/
JOT(4, "allocating %i field buffers of size %li\n", \
FIELD_BUFFER_MANY, (long int)FIELD_BUFFER_SIZE);
JOT(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 ((void *)NULL != peasycap->field_buffer[k][m].pgo) {
SAY("ERROR: attempting to reallocate " \
"field buffers\n");
} else {
pbuf = (void *) __get_free_page(GFP_KERNEL);
if ((void *)NULL == pbuf) {
SAY("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;
JOT(4, "allocation of field buffers done: %i pages\n", k * \
m);
/*---------------------------------------------------------------------------*/
JOT(4, "allocating %i isoc video buffers of size %i\n", \
VIDEO_ISOC_BUFFER_MANY, \
peasycap->video_isoc_buffer_size);
JOT(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 (NULL == pbuf) {
SAY("ERROR: Could not allocate isoc video buffer " \
"%i\n", k);
return -ENOMEM;
} else
peasycap->allocation_video_page += \
((unsigned int)(0x01 << 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;
}
JOT(4, "allocation of isoc video buffers done: %i pages\n", \
k * (0x01 << VIDEO_ISOC_ORDER));
/*---------------------------------------------------------------------------*/
/*
* ALLOCATE AND INITIALIZE MULTIPLE struct urb ...
*/
/*---------------------------------------------------------------------------*/
JOT(4, "allocating %i struct urb.\n", VIDEO_ISOC_BUFFER_MANY);
JOT(4, "using %i=peasycap->video_isoc_framesperdesc\n", \
peasycap->video_isoc_framesperdesc);
JOT(4, "using %i=peasycap->video_isoc_maxframesize\n", \
peasycap->video_isoc_maxframesize);
JOT(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 (NULL == purb) {
SAY("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 (NULL == pdata_urb) {
SAY("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) {
JOT(4, "initializing video urbs thus:\n");
JOT(4, " purb->interval = 1;\n");
JOT(4, " purb->dev = peasycap->pusb_device;\n");
JOT(4, " purb->pipe = usb_rcvisocpipe" \
"(peasycap->pusb_device,%i);\n", \
peasycap->video_endpointnumber);
JOT(4, " purb->transfer_flags = URB_ISO_ASAP;\n");
JOT(4, " purb->transfer_buffer = peasycap->" \
"video_isoc_buffer[.].pgo;\n");
JOT(4, " purb->transfer_buffer_length = %i;\n", \
peasycap->video_isoc_buffer_size);
JOT(4, " purb->complete = easycap_complete;\n");
JOT(4, " purb->context = peasycap;\n");
JOT(4, " purb->start_frame = 0;\n");
JOT(4, " purb->number_of_packets = %i;\n", \
peasycap->video_isoc_framesperdesc);
JOT(4, " for (j = 0; j < %i; j++)\n", \
peasycap->video_isoc_framesperdesc);
JOT(4, " {\n");
JOT(4, " purb->iso_frame_desc[j].offset = j*%i;\n",\
peasycap->video_isoc_maxframesize);
JOT(4, " purb->iso_frame_desc[j].length = %i;\n", \
peasycap->video_isoc_maxframesize);
JOT(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;
}
}
JOT(4, "allocation of %i struct urb done.\n", k);
/*--------------------------------------------------------------------------*/
/*
* SAVE POINTER peasycap IN THIS INTERFACE.
*/
/*--------------------------------------------------------------------------*/
usb_set_intfdata(pusb_interface, peasycap);
/*--------------------------------------------------------------------------*/
/*
* THE VIDEO DEVICE CAN BE REGISTERED NOW, AS IT IS READY.
*/
/*--------------------------------------------------------------------------*/
#if (!defined(EASYCAP_IS_VIDEODEV_CLIENT))
if (0 != (usb_register_dev(pusb_interface, &easycap_class))) {
err("Not able to get a minor for this device");
usb_set_intfdata(pusb_interface, NULL);
return -ENODEV;
} else
(peasycap->registered_video)++;
SAY("easycap attached to minor #%d\n", pusb_interface->minor);
break;
/*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/
#else
pvideo_device = (struct video_device *)\
kzalloc(sizeof(struct video_device), GFP_KERNEL);
if ((struct video_device *)NULL == pvideo_device) {
SAY("ERROR: Could not allocate structure video_device\n");
return -ENOMEM;
}
if (VIDEO_DEVICE_MANY <= video_device_many) {
SAY("ERROR: Too many /dev/videos\n");
return -ENOMEM;
}
pvideo_array[video_device_many] = pvideo_device; video_device_many++;
strcpy(&pvideo_device->name[0], "easycapdc60");
#if defined(EASYCAP_NEEDS_V4L2_FOPS)
pvideo_device->fops = &v4l2_fops;
#else
pvideo_device->fops = &easycap_fops;
#endif /*EASYCAP_NEEDS_V4L2_FOPS*/
pvideo_device->minor = -1;
pvideo_device->release = (void *)(&videodev_release);
video_set_drvdata(pvideo_device, (void *)peasycap);
rc = video_register_device(pvideo_device, VFL_TYPE_GRABBER, -1);
if (0 != rc) {
err("Not able to register with videodev");
videodev_release(pvideo_device);
return -ENODEV;
} else {
peasycap->pvideo_device = pvideo_device;
(peasycap->registered_video)++;
JOT(4, "registered with videodev: %i=minor\n", \
pvideo_device->minor);
}
/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
#endif /*EASYCAP_IS_VIDEODEV_CLIENT*/
break;
}
/*--------------------------------------------------------------------------*/
/*
* INTERFACE 1 IS THE AUDIO CONTROL INTERFACE
* INTERFACE 2 IS THE AUDIO STREAMING INTERFACE
*/
/*--------------------------------------------------------------------------*/
case 1: {
/*--------------------------------------------------------------------------*/
/*
* SAVE POINTER peasycap IN INTERFACE 1
*/
/*--------------------------------------------------------------------------*/
usb_set_intfdata(pusb_interface, peasycap);
JOT(4, "no initialization required for interface %i\n", \
pusb_interface_descriptor->bInterfaceNumber);
break;
}
/*--------------------------------------------------------------------------*/
case 2: {
if (!peasycap) {
SAY("MISTAKE: peasycap is NULL\n");
return -EFAULT;
}
if (!isokalt) {
SAY("ERROR: no viable audio_altsetting_on\n");
return -ENOENT;
} else {
peasycap->audio_altsetting_on = okalt[isokalt - 1];
JOT(4, "%i=audio_altsetting_on <====\n", \
peasycap->audio_altsetting_on);
}
if (!isokepn) {
SAY("ERROR: no viable audio_endpointnumber\n");
return -ENOENT;
} else {
peasycap->audio_endpointnumber = okepn[isokepn - 1];
JOT(4, "%i=audio_endpointnumber\n", \
peasycap->audio_endpointnumber);
}
if (!isokmps) {
SAY("ERROR: no viable audio_maxpacketsize\n");
return -ENOENT;
} else {
peasycap->audio_isoc_maxframesize = okmps[isokmps - 1];
JOT(4, "%i=audio_isoc_maxframesize\n", \
peasycap->audio_isoc_maxframesize);
if (0 >= peasycap->audio_isoc_maxframesize) {
SAY("ERROR: bad audio_isoc_maxframesize\n");
return -ENOENT;
}
if (9 == peasycap->audio_isoc_maxframesize) {
peasycap->ilk |= 0x02;
SAY("hardware is FOUR-CVBS\n");
peasycap->microphone = true;
peasycap->audio_pages_per_fragment = 4;
} else if (256 == peasycap->audio_isoc_maxframesize) {
peasycap->ilk &= ~0x02;
SAY("hardware is CVBS+S-VIDEO\n");
peasycap->microphone = false;
peasycap->audio_pages_per_fragment = 4;
} else {
SAY("hardware is unidentified:\n");
SAY("%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);
JOT(4, "%6i=AUDIO_FRAGMENT_MANY\n", AUDIO_FRAGMENT_MANY);
JOT(4, "%6i=audio_pages_per_fragment\n", \
peasycap->audio_pages_per_fragment);
JOT(4, "%6i=audio_bytes_per_fragment\n", \
peasycap->audio_bytes_per_fragment);
JOT(4, "%6i=audio_buffer_page_many\n", \
peasycap->audio_buffer_page_many);
peasycap->audio_isoc_framesperdesc = 128;
JOT(4, "%i=audio_isoc_framesperdesc\n", \
peasycap->audio_isoc_framesperdesc);
if (0 >= peasycap->audio_isoc_framesperdesc) {
SAY("ERROR: bad audio_isoc_framesperdesc\n");
return -ENOENT;
}
peasycap->audio_isoc_buffer_size = \
peasycap->audio_isoc_maxframesize * \
peasycap->audio_isoc_framesperdesc;
JOT(4, "%i=audio_isoc_buffer_size\n", \
peasycap->audio_isoc_buffer_size);
if (AUDIO_ISOC_BUFFER_SIZE < \
peasycap->audio_isoc_buffer_size) {
SAY("MISTAKE: audio_isoc_buffer_size bigger "
"than %li=AUDIO_ISOC_BUFFER_SIZE\n", \
AUDIO_ISOC_BUFFER_SIZE);
return -EFAULT;
}
}
if (-1 == peasycap->audio_interface) {
SAY("MISTAKE: audio_interface is unset\n");
return -EFAULT;
}
if (-1 == peasycap->audio_altsetting_on) {
SAY("MISTAKE: audio_altsetting_on is unset\n");
return -EFAULT;
}
if (-1 == peasycap->audio_altsetting_off) {
SAY("MISTAKE: audio_interface_off is unset\n");
return -EFAULT;
}
if (-1 == peasycap->audio_endpointnumber) {
SAY("MISTAKE: audio_endpointnumber is unset\n");
return -EFAULT;
}
if (-1 == peasycap->audio_isoc_maxframesize) {
SAY("MISTAKE: audio_isoc_maxframesize is unset\n");
return -EFAULT;
}
if (-1 == peasycap->audio_isoc_buffer_size) {
SAY("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);
JOT(4, "allocating an audio buffer\n");
JOT(4, ".... scattered over %i pages\n", \
peasycap->audio_buffer_page_many);
for (k = 0; k < peasycap->audio_buffer_page_many; k++) {
if ((void *)NULL != peasycap->audio_buffer[k].pgo) {
SAY("ERROR: attempting to reallocate audio buffers\n");
} else {
pbuf = (void *) __get_free_page(GFP_KERNEL);
if ((void *)NULL == pbuf) {
SAY("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;
JOT(4, "allocation of audio buffer done: %i pages\n", k);
/*---------------------------------------------------------------------------*/
JOT(4, "allocating %i isoc audio buffers of size %i\n", \
AUDIO_ISOC_BUFFER_MANY, peasycap->audio_isoc_buffer_size);
JOT(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 (NULL == pbuf) {
SAY("ERROR: Could not allocate isoc audio buffer " \
"%i\n", k);
return -ENOMEM;
} else
peasycap->allocation_audio_page += \
((unsigned int)(0x01 << 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;
}
JOT(4, "allocation of isoc audio buffers done.\n");
/*---------------------------------------------------------------------------*/
/*
* ALLOCATE AND INITIALIZE MULTIPLE struct urb ...
*/
/*---------------------------------------------------------------------------*/
JOT(4, "allocating %i struct urb.\n", AUDIO_ISOC_BUFFER_MANY);
JOT(4, "using %i=peasycap->audio_isoc_framesperdesc\n", \
peasycap->audio_isoc_framesperdesc);
JOT(4, "using %i=peasycap->audio_isoc_maxframesize\n", \
peasycap->audio_isoc_maxframesize);
JOT(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 (NULL == purb) {
SAY("ERROR: usb_alloc_urb returned NULL for buffer " \
"%i\n", k);
return -ENOMEM;
} else
peasycap->allocation_audio_urb += 1 ;
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
pdata_urb = kzalloc(sizeof(struct data_urb), GFP_KERNEL);
if (NULL == pdata_urb) {
SAY("ERROR: Could not allocate struct data_urb.\n");
return -ENOMEM;
} else
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) {
JOT(4, "initializing audio urbs thus:\n");
JOT(4, " purb->interval = 1;\n");
JOT(4, " purb->dev = peasycap->pusb_device;\n");
JOT(4, " purb->pipe = usb_rcvisocpipe(peasycap->" \
"pusb_device,%i);\n", \
peasycap->audio_endpointnumber);
JOT(4, " purb->transfer_flags = URB_ISO_ASAP;\n");
JOT(4, " purb->transfer_buffer = " \
"peasycap->audio_isoc_buffer[.].pgo;\n");
JOT(4, " purb->transfer_buffer_length = %i;\n", \
peasycap->audio_isoc_buffer_size);
JOT(4, " purb->complete = easysnd_complete;\n");
JOT(4, " purb->context = peasycap;\n");
JOT(4, " purb->start_frame = 0;\n");
JOT(4, " purb->number_of_packets = %i;\n", \
peasycap->audio_isoc_framesperdesc);
JOT(4, " for (j = 0; j < %i; j++)\n", \
peasycap->audio_isoc_framesperdesc);
JOT(4, " {\n");
JOT(4, " purb->iso_frame_desc[j].offset = j*%i;\n",\
peasycap->audio_isoc_maxframesize);
JOT(4, " purb->iso_frame_desc[j].length = %i;\n", \
peasycap->audio_isoc_maxframesize);
JOT(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;
purb->complete = easysnd_complete;
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;
}
}
JOT(4, "allocation of %i struct urb done.\n", k);
/*---------------------------------------------------------------------------*/
/*
* SAVE POINTER peasycap IN THIS INTERFACE.
*/
/*---------------------------------------------------------------------------*/
usb_set_intfdata(pusb_interface, peasycap);
/*---------------------------------------------------------------------------*/
/*
* THE AUDIO DEVICE CAN BE REGISTERED NOW, AS IT IS READY.
*/
/*---------------------------------------------------------------------------*/
rc = usb_register_dev(pusb_interface, &easysnd_class);
if (0 != rc) {
err("Not able to get a minor for this device.");
usb_set_intfdata(pusb_interface, NULL);
return -ENODEV;
} else
(peasycap->registered_audio)++;
/*---------------------------------------------------------------------------*/
/*
* LET THE USER KNOW WHAT NODE THE AUDIO DEVICE IS ATTACHED TO.
*/
/*---------------------------------------------------------------------------*/
SAY("easysnd attached to minor #%d\n", pusb_interface->minor);
break;
}
/*---------------------------------------------------------------------------*/
/*
* INTERFACES OTHER THAN 0, 1 AND 2 ARE UNEXPECTED
*/
/*---------------------------------------------------------------------------*/
default: {
JOT(4, "ERROR: unexpected interface %i\n", bInterfaceNumber);
return -EINVAL;
}
}
JOT(4, "ends successfully for interface %i\n", \
pusb_interface_descriptor->bInterfaceNumber);
return 0;
}
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
/*
* WHEN THIS FUNCTION IS CALLED THE DEVICE HAS ALREADY BEEN PHYSICALLY
* UNPLUGGED.
* HENCE peasycap->pusb_device IS NO LONGER VALID AND MUST BE SET TO NULL.
*/
/*---------------------------------------------------------------------------*/
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;
JOT(4, "\n");
if ((struct usb_interface *)NULL == pusb_interface) {
JOT(4, "ERROR: pusb_interface is NULL\n");
return;
}
pusb_host_interface = pusb_interface->cur_altsetting;
if ((struct usb_host_interface *)NULL == pusb_host_interface) {
JOT(4, "ERROR: pusb_host_interface is NULL\n");
return;
}
pusb_interface_descriptor = &(pusb_host_interface->desc);
if ((struct usb_interface_descriptor *)NULL == 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);
peasycap = usb_get_intfdata(pusb_interface);
if ((struct easycap *)NULL == peasycap)
SAY("ERROR: peasycap is NULL\n");
else {
peasycap->pusb_device = (struct usb_device *)NULL;
switch (bInterfaceNumber) {
/*---------------------------------------------------------------------------*/
case 0: {
if ((struct list_head *)NULL != peasycap->purb_video_head) {
JOT(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 ((struct data_urb *)NULL != pdata_urb) {
if ((struct urb *)NULL != \
pdata_urb->purb) {
usb_kill_urb(pdata_urb->purb);
m++;
}
}
}
JOT(4, "%i video urbs killed\n", m);
} else
SAY("ERROR: peasycap->purb_video_head is NULL\n");
break;
}
/*---------------------------------------------------------------------------*/
case 2: {
if ((struct list_head *)NULL != peasycap->purb_audio_head) {
JOT(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 ((struct data_urb *)NULL != pdata_urb) {
if ((struct urb *)NULL != \
pdata_urb->purb) {
usb_kill_urb(pdata_urb->purb);
m++;
}
}
}
JOT(4, "%i audio urbs killed\n", m);
} else
SAY("ERROR: peasycap->purb_audio_head is NULL\n");
break;
}
/*---------------------------------------------------------------------------*/
default:
break;
}
}
/*--------------------------------------------------------------------------*/
/*
* DEREGISTER
*/
/*--------------------------------------------------------------------------*/
switch (bInterfaceNumber) {
case 0: {
#if (!defined(EASYCAP_IS_VIDEODEV_CLIENT))
if ((struct easycap *)NULL == peasycap) {
SAY("ERROR: peasycap has become NULL\n");
} else {
lock_kernel();
usb_deregister_dev(pusb_interface, &easycap_class);
(peasycap->registered_video)--;
JOT(4, "intf[%i]: usb_deregister_dev()\n", bInterfaceNumber);
unlock_kernel();
SAY("easycap detached from minor #%d\n", minor);
}
/*vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv*/
#else
if ((struct easycap *)NULL == peasycap)
SAY("ERROR: peasycap has become NULL\n");
else {
lock_kernel();
video_unregister_device(peasycap->pvideo_device);
(peasycap->registered_video)--;
unlock_kernel();
JOT(4, "unregistered with videodev: %i=minor\n", \
pvideo_device->minor);
}
/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
#endif /*EASYCAP_IS_VIDEODEV_CLIENT*/
break;
}
case 2: {
lock_kernel();
usb_deregister_dev(pusb_interface, &easysnd_class);
if ((struct easycap *)NULL != peasycap)
(peasycap->registered_audio)--;
JOT(4, "intf[%i]: usb_deregister_dev()\n", bInterfaceNumber);
unlock_kernel();
SAY("easysnd detached from minor #%d\n", minor);
break;
}
default:
break;
}
/*---------------------------------------------------------------------------*/
/*
* CALL easycap_delete() IF NO REMAINING REFERENCES TO peasycap
*/
/*---------------------------------------------------------------------------*/
if ((struct easycap *)NULL == peasycap) {
SAY("ERROR: peasycap has become NULL\n");
SAY("cannot call kref_put()\n");
SAY("ending unsuccessfully: may cause memory leak\n");
return;
}
if (!peasycap->kref.refcount.counter) {
SAY("ERROR: peasycap->kref.refcount.counter is zero " \
"so cannot call kref_put()\n");
SAY("ending unsuccessfully: may cause memory leak\n");
return;
}
JOT(4, "intf[%i]: kref_put() with %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);
/*---------------------------------------------------------------------------*/
JOT(4, "ends\n");
return;
}
/*****************************************************************************/
int __init
easycap_module_init(void)
{
int result;
SAY("========easycap=======\n");
JOT(4, "begins. %i=debug\n", easycap_debug);
SAY("version: " EASYCAP_DRIVER_VERSION "\n");
/*---------------------------------------------------------------------------*/
/*
* REGISTER THIS DRIVER WITH THE USB SUBSYTEM.
*/
/*---------------------------------------------------------------------------*/
JOT(4, "registering driver easycap\n");
result = usb_register(&easycap_usb_driver);
if (0 != result)
SAY("ERROR: usb_register returned %i\n", result);
JOT(4, "ends\n");
return result;
}
/*****************************************************************************/
void __exit
easycap_module_exit(void)
{
JOT(4, "begins\n");
/*---------------------------------------------------------------------------*/
/*
* DEREGISTER THIS DRIVER WITH THE USB SUBSYTEM.
*/
/*---------------------------------------------------------------------------*/
usb_deregister(&easycap_usb_driver);
JOT(4, "ends\n");
}
/*****************************************************************************/
module_init(easycap_module_init);
module_exit(easycap_module_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("R.M. Thomas <rmthomas@sciolus.org>");
MODULE_DESCRIPTION(EASYCAP_DRIVER_DESCRIPTION);
MODULE_VERSION(EASYCAP_DRIVER_VERSION);
#if defined(EASYCAP_DEBUG)
MODULE_PARM_DESC(easycap_debug, "debug: 0 (default), 1, 2,...");
#endif /*EASYCAP_DEBUG*/
/*****************************************************************************/