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