diff options
Diffstat (limited to 'drivers/staging/easycap/easycap_sound_oss.c')
| -rw-r--r-- | drivers/staging/easycap/easycap_sound_oss.c | 954 |
1 files changed, 954 insertions, 0 deletions
diff --git a/drivers/staging/easycap/easycap_sound_oss.c b/drivers/staging/easycap/easycap_sound_oss.c new file mode 100644 index 000000000000..d92baf222765 --- /dev/null +++ b/drivers/staging/easycap/easycap_sound_oss.c @@ -0,0 +1,954 @@ +/****************************************************************************** +* * +* easycap_sound.c * +* * +* Audio driver for EasyCAP USB2.0 Video Capture Device DC60 * +* * +* * +******************************************************************************/ +/* + * + * Copyright (C) 2010 R.M. Thomas <rmthomas@sciolus.org> + * + * + * This is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * The software is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this software; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * +*/ +/*****************************************************************************/ + +#include "easycap.h" + +/*****************************************************************************/ +/**************************** **************************/ +/**************************** Open Sound System **************************/ +/**************************** **************************/ +/*****************************************************************************/ +/*--------------------------------------------------------------------------*/ +/* + * PARAMETERS USED WHEN REGISTERING THE AUDIO INTERFACE + */ +/*--------------------------------------------------------------------------*/ +/*****************************************************************************/ +/*---------------------------------------------------------------------------*/ +/* + * ON COMPLETION OF AN AUDIO URB ITS DATA IS COPIED TO THE AUDIO BUFFERS + * PROVIDED peasycap->audio_idle IS ZERO. REGARDLESS OF THIS BEING TRUE, + * IT IS RESUBMITTED PROVIDED peasycap->audio_isoc_streaming IS NOT ZERO. + */ +/*---------------------------------------------------------------------------*/ +void +easyoss_complete(struct urb *purb) +{ + struct easycap *peasycap; + struct data_buffer *paudio_buffer; + u8 *p1, *p2; + s16 tmp; + int i, j, more, much, leap, rc; +#ifdef UPSAMPLE + int k; + s16 oldaudio, newaudio, delta; +#endif /*UPSAMPLE*/ + + JOT(16, "\n"); + + if (!purb) { + SAY("ERROR: purb is NULL\n"); + return; + } + peasycap = purb->context; + if (!peasycap) { + SAY("ERROR: peasycap is NULL\n"); + return; + } + if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) { + SAY("ERROR: bad peasycap\n"); + return; + } + much = 0; + if (peasycap->audio_idle) { + JOM(16, "%i=audio_idle %i=audio_isoc_streaming\n", + peasycap->audio_idle, peasycap->audio_isoc_streaming); + if (peasycap->audio_isoc_streaming) { + rc = usb_submit_urb(purb, GFP_ATOMIC); + if (rc) { + if (-ENODEV != rc && -ENOENT != rc) { + SAM("ERROR: while %i=audio_idle, " + "usb_submit_urb() failed with rc: -%s: %d\n", + peasycap->audio_idle, + strerror(rc), rc); + } + } + } + return; + } +/*---------------------------------------------------------------------------*/ + if (purb->status) { + if ((-ESHUTDOWN == purb->status) || (-ENOENT == purb->status)) { + JOM(16, "urb status -ESHUTDOWN or -ENOENT\n"); + return; + } + SAM("ERROR: non-zero urb status: -%s: %d\n", + strerror(purb->status), purb->status); + goto resubmit; + } +/*---------------------------------------------------------------------------*/ +/* + * PROCEED HERE WHEN NO ERROR + */ +/*---------------------------------------------------------------------------*/ +#ifdef UPSAMPLE + oldaudio = peasycap->oldaudio; +#endif /*UPSAMPLE*/ + + for (i = 0; i < purb->number_of_packets; i++) { + if (!purb->iso_frame_desc[i].status) { + + SAM("-%s\n", strerror(purb->iso_frame_desc[i].status)); + + more = purb->iso_frame_desc[i].actual_length; + + if (!more) + peasycap->audio_mt++; + else { + if (peasycap->audio_mt) { + JOM(12, "%4i empty audio urb frames\n", + peasycap->audio_mt); + peasycap->audio_mt = 0; + } + + p1 = (u8 *)(purb->transfer_buffer + purb->iso_frame_desc[i].offset); + + leap = 0; + p1 += leap; + more -= leap; + /* + * COPY more BYTES FROM ISOC BUFFER + * TO AUDIO BUFFER, CONVERTING + * 8-BIT MONO TO 16-BIT SIGNED + * LITTLE-ENDIAN SAMPLES IF NECESSARY + */ + while (more) { + if (0 > more) { + SAM("MISTAKE: more is negative\n"); + return; + } + if (peasycap->audio_buffer_page_many <= peasycap->audio_fill) { + SAM("ERROR: bad peasycap->audio_fill\n"); + return; + } + + paudio_buffer = &peasycap->audio_buffer[peasycap->audio_fill]; + if (PAGE_SIZE < (paudio_buffer->pto - paudio_buffer->pgo)) { + SAM("ERROR: bad paudio_buffer->pto\n"); + return; + } + if (PAGE_SIZE == (paudio_buffer->pto - paudio_buffer->pgo)) { + + paudio_buffer->pto = paudio_buffer->pgo; + (peasycap->audio_fill)++; + if (peasycap->audio_buffer_page_many <= peasycap->audio_fill) + peasycap->audio_fill = 0; + + JOM(8, "bumped peasycap->" + "audio_fill to %i\n", + peasycap->audio_fill); + + paudio_buffer = &peasycap->audio_buffer[peasycap->audio_fill]; + paudio_buffer->pto = paudio_buffer->pgo; + + if (!(peasycap->audio_fill % peasycap->audio_pages_per_fragment)) { + JOM(12, "wakeup call on wq_audio, %i=frag reading %i=fragment fill\n", + (peasycap->audio_read / peasycap->audio_pages_per_fragment), + (peasycap->audio_fill / peasycap->audio_pages_per_fragment)); + wake_up_interruptible(&(peasycap->wq_audio)); + } + } + + much = PAGE_SIZE - (int)(paudio_buffer->pto - paudio_buffer->pgo); + + if (!peasycap->microphone) { + if (much > more) + much = more; + + memcpy(paudio_buffer->pto, p1, much); + p1 += much; + more -= much; + } else { +#ifdef UPSAMPLE + if (much % 16) + JOM(8, "MISTAKE? much" + " is not divisible by 16\n"); + if (much > (16 * more)) + much = 16 * more; + p2 = (u8 *)paudio_buffer->pto; + + for (j = 0; j < (much/16); j++) { + newaudio = ((int) *p1) - 128; + newaudio = 128 * newaudio; + + delta = (newaudio - oldaudio) / 4; + tmp = oldaudio + delta; + + for (k = 0; k < 4; k++) { + *p2 = (0x00FF & tmp); + *(p2 + 1) = (0xFF00 & tmp) >> 8; + p2 += 2; + *p2 = (0x00FF & tmp); + *(p2 + 1) = (0xFF00 & tmp) >> 8; + p2 += 2; + + tmp += delta; + } + p1++; + more--; + oldaudio = tmp; + } +#else /*!UPSAMPLE*/ + if (much > (2 * more)) + much = 2 * more; + p2 = (u8 *)paudio_buffer->pto; + + for (j = 0; j < (much / 2); j++) { + tmp = ((int) *p1) - 128; + tmp = 128 * tmp; + *p2 = (0x00FF & tmp); + *(p2 + 1) = (0xFF00 & tmp) >> 8; + p1++; + p2 += 2; + more--; + } +#endif /*UPSAMPLE*/ + } + (paudio_buffer->pto) += much; + } + } + } else { + JOM(12, "discarding audio samples because " + "%i=purb->iso_frame_desc[i].status\n", + purb->iso_frame_desc[i].status); + } + +#ifdef UPSAMPLE + peasycap->oldaudio = oldaudio; +#endif /*UPSAMPLE*/ + + } +/*---------------------------------------------------------------------------*/ +/* + * RESUBMIT THIS URB + */ +/*---------------------------------------------------------------------------*/ +resubmit: + if (peasycap->audio_isoc_streaming) { + rc = usb_submit_urb(purb, GFP_ATOMIC); + if (rc) { + if (-ENODEV != rc && -ENOENT != rc) { + SAM("ERROR: while %i=audio_idle, " + "usb_submit_urb() failed " + "with rc: -%s: %d\n", peasycap->audio_idle, + strerror(rc), rc); + } + } + } + return; +} +/*****************************************************************************/ +/*---------------------------------------------------------------------------*/ +/* + * THE AUDIO URBS ARE SUBMITTED AT THIS EARLY STAGE SO THAT IT IS POSSIBLE TO + * STREAM FROM /dev/easyoss1 WITH SIMPLE PROGRAMS SUCH AS cat WHICH DO NOT + * HAVE AN IOCTL INTERFACE. + */ +/*---------------------------------------------------------------------------*/ +static int easyoss_open(struct inode *inode, struct file *file) +{ + struct usb_interface *pusb_interface; + struct easycap *peasycap; + int subminor; + struct v4l2_device *pv4l2_device; + + JOT(4, "begins\n"); + + subminor = iminor(inode); + + pusb_interface = usb_find_interface(&easycap_usb_driver, subminor); + if (!pusb_interface) { + SAY("ERROR: pusb_interface is NULL\n"); + SAY("ending unsuccessfully\n"); + return -1; + } + peasycap = usb_get_intfdata(pusb_interface); + if (!peasycap) { + SAY("ERROR: peasycap is NULL\n"); + SAY("ending unsuccessfully\n"); + return -1; + } +/*---------------------------------------------------------------------------*/ +/* + * 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 -EFAULT; + } + peasycap = container_of(pv4l2_device, + struct easycap, v4l2_device); + } +/*---------------------------------------------------------------------------*/ + if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) { + SAY("ERROR: bad peasycap: %p\n", peasycap); + return -EFAULT; + } +/*---------------------------------------------------------------------------*/ + + file->private_data = peasycap; + + if (0 != easycap_sound_setup(peasycap)) { + ; + ; + } + return 0; +} +/*****************************************************************************/ +static int easyoss_release(struct inode *inode, struct file *file) +{ + struct easycap *peasycap; + + JOT(4, "begins\n"); + + 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 (0 != kill_audio_urbs(peasycap)) { + SAM("ERROR: kill_audio_urbs() failed\n"); + return -EFAULT; + } + JOM(4, "ending successfully\n"); + return 0; +} +/*****************************************************************************/ +static ssize_t easyoss_read(struct file *file, char __user *puserspacebuffer, + size_t kount, loff_t *poff) +{ + struct timeval timeval; + long long int above, below, mean; + struct signed_div_result sdr; + unsigned char *p0; + long int kount1, more, rc, l0, lm; + int fragment, kd; + struct easycap *peasycap; + struct data_buffer *pdata_buffer; + size_t szret; + +/*---------------------------------------------------------------------------*/ +/* + * DO A BLOCKING READ TO TRANSFER DATA TO USER SPACE. + * + ****************************************************************************** + ***** N.B. IF THIS FUNCTION RETURNS 0, NOTHING IS SEEN IN USER SPACE. ****** + ***** THIS CONDITION SIGNIFIES END-OF-FILE. ****** + ****************************************************************************** + */ +/*---------------------------------------------------------------------------*/ + + JOT(8, "%5zd=kount %5lld=*poff\n", kount, *poff); + + if (!file) { + SAY("ERROR: file is NULL\n"); + return -ERESTARTSYS; + } + peasycap = file->private_data; + if (!peasycap) { + SAY("ERROR in easyoss_read(): 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_audio))) { + SAY("ERROR: " + "cannot lock dongle[%i].mutex_audio\n", kd); + return -ERESTARTSYS; + } + JOM(4, "locked dongle[%i].mutex_audio\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_audio); + return -ERESTARTSYS; + } + peasycap = file->private_data; + if (!peasycap) { + SAY("ERROR: peasycap is NULL\n"); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -ERESTARTSYS; + } + if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) { + SAY("ERROR: bad peasycap: %p\n", peasycap); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -ERESTARTSYS; + } + if (!peasycap->pusb_device) { + SAM("ERROR: peasycap->pusb_device is NULL\n"); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + 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; + } +/*---------------------------------------------------------------------------*/ + JOT(16, "%sBLOCKING kount=%zd, *poff=%lld\n", + (file->f_flags & O_NONBLOCK) ? "NON" : "", kount, *poff); + + if ((0 > peasycap->audio_read) || + (peasycap->audio_buffer_page_many <= peasycap->audio_read)) { + SAM("ERROR: peasycap->audio_read out of range\n"); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + pdata_buffer = &peasycap->audio_buffer[peasycap->audio_read]; + if (!pdata_buffer) { + SAM("ERROR: pdata_buffer is NULL\n"); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + JOM(12, "before wait, %i=frag read %i=frag fill\n", + (peasycap->audio_read / peasycap->audio_pages_per_fragment), + (peasycap->audio_fill / peasycap->audio_pages_per_fragment)); + fragment = (peasycap->audio_read / peasycap->audio_pages_per_fragment); + while ((fragment == (peasycap->audio_fill / peasycap->audio_pages_per_fragment)) || + (0 == (PAGE_SIZE - (pdata_buffer->pto - pdata_buffer->pgo)))) { + if (file->f_flags & O_NONBLOCK) { + JOM(16, "returning -EAGAIN as instructed\n"); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EAGAIN; + } + rc = wait_event_interruptible(peasycap->wq_audio, + (peasycap->audio_idle || peasycap->audio_eof || + ((fragment != + (peasycap->audio_fill / peasycap->audio_pages_per_fragment)) && + (0 < (PAGE_SIZE - (pdata_buffer->pto - pdata_buffer->pgo)))))); + if (rc) { + SAM("aborted by signal\n"); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -ERESTARTSYS; + } + if (peasycap->audio_eof) { + JOM(8, "returning 0 because %i=audio_eof\n", + peasycap->audio_eof); + kill_audio_urbs(peasycap); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return 0; + } + if (peasycap->audio_idle) { + JOM(16, "returning 0 because %i=audio_idle\n", + peasycap->audio_idle); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return 0; + } + if (!peasycap->audio_isoc_streaming) { + JOM(16, "returning 0 because audio urbs not streaming\n"); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return 0; + } + } + JOM(12, "after wait, %i=frag read %i=frag fill\n", + (peasycap->audio_read / peasycap->audio_pages_per_fragment), + (peasycap->audio_fill / peasycap->audio_pages_per_fragment)); + szret = (size_t)0; + fragment = (peasycap->audio_read / peasycap->audio_pages_per_fragment); + while (fragment == (peasycap->audio_read / peasycap->audio_pages_per_fragment)) { + if (!pdata_buffer->pgo) { + SAM("ERROR: pdata_buffer->pgo is NULL\n"); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + if (!pdata_buffer->pto) { + SAM("ERROR: pdata_buffer->pto is NULL\n"); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + kount1 = PAGE_SIZE - (pdata_buffer->pto - pdata_buffer->pgo); + if (0 > kount1) { + SAM("MISTAKE: kount1 is negative\n"); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -ERESTARTSYS; + } + if (!kount1) { + peasycap->audio_read++; + if (peasycap->audio_buffer_page_many <= peasycap->audio_read) + peasycap->audio_read = 0; + JOM(12, "bumped peasycap->audio_read to %i\n", + peasycap->audio_read); + + if (fragment != (peasycap->audio_read / peasycap->audio_pages_per_fragment)) + break; + + if ((0 > peasycap->audio_read) || + (peasycap->audio_buffer_page_many <= peasycap->audio_read)) { + SAM("ERROR: peasycap->audio_read out of range\n"); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + pdata_buffer = &peasycap->audio_buffer[peasycap->audio_read]; + if (!pdata_buffer) { + SAM("ERROR: pdata_buffer is NULL\n"); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + if (!pdata_buffer->pgo) { + SAM("ERROR: pdata_buffer->pgo is NULL\n"); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + if (!pdata_buffer->pto) { + SAM("ERROR: pdata_buffer->pto is NULL\n"); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + kount1 = PAGE_SIZE - (pdata_buffer->pto - pdata_buffer->pgo); + } + JOM(12, "ready to send %zd bytes\n", kount1); + JOM(12, "still to send %li bytes\n", (long int) kount); + more = kount1; + if (more > kount) + more = kount; + JOM(12, "agreed to send %li bytes from page %i\n", + more, peasycap->audio_read); + if (!more) + break; + + /* + * ACCUMULATE DYNAMIC-RANGE INFORMATION + */ + p0 = (unsigned char *)pdata_buffer->pgo; + l0 = 0; + lm = more/2; + while (l0 < lm) { + SUMMER(p0, &peasycap->audio_sample, + &peasycap->audio_niveau, + &peasycap->audio_square); + l0++; + p0 += 2; + } + /*-----------------------------------------------------------*/ + rc = copy_to_user(puserspacebuffer, pdata_buffer->pto, more); + if (rc) { + SAM("ERROR: copy_to_user() returned %li\n", rc); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + *poff += (loff_t)more; + szret += (size_t)more; + pdata_buffer->pto += more; + puserspacebuffer += more; + kount -= (size_t)more; + } + JOM(12, "after read, %i=frag read %i=frag fill\n", + (peasycap->audio_read / peasycap->audio_pages_per_fragment), + (peasycap->audio_fill / peasycap->audio_pages_per_fragment)); + if (kount < 0) { + SAM("MISTAKE: %li=kount %li=szret\n", + (long int)kount, (long int)szret); + } +/*---------------------------------------------------------------------------*/ +/* + * CALCULATE DYNAMIC RANGE FOR (VAPOURWARE) AUTOMATIC VOLUME CONTROL + */ +/*---------------------------------------------------------------------------*/ + if (peasycap->audio_sample) { + below = peasycap->audio_sample; + above = peasycap->audio_square; + sdr = signed_div(above, below); + above = sdr.quotient; + mean = peasycap->audio_niveau; + sdr = signed_div(mean, peasycap->audio_sample); + + JOM(8, "%8lli=mean %8lli=meansquare after %lli samples, =>\n", + sdr.quotient, above, peasycap->audio_sample); + + sdr = signed_div(above, 32768); + JOM(8, "audio dynamic range is roughly %lli\n", sdr.quotient); + } +/*---------------------------------------------------------------------------*/ +/* + * UPDATE THE AUDIO CLOCK + */ +/*---------------------------------------------------------------------------*/ + do_gettimeofday(&timeval); + if (!peasycap->timeval1.tv_sec) { + peasycap->audio_bytes = 0; + peasycap->timeval3 = timeval; + peasycap->timeval1 = peasycap->timeval3; + sdr.quotient = 192000; + } else { + peasycap->audio_bytes += (long long int) szret; + below = ((long long int)(1000000)) * + ((long long int)(timeval.tv_sec - peasycap->timeval3.tv_sec)) + + (long long int)(timeval.tv_usec - peasycap->timeval3.tv_usec); + above = 1000000 * ((long long int) peasycap->audio_bytes); + + if (below) + sdr = signed_div(above, below); + else + sdr.quotient = 192000; + } + JOM(8, "audio streaming at %lli bytes/second\n", sdr.quotient); + peasycap->dnbydt = sdr.quotient; + + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + JOM(4, "unlocked easycapdc60_dongle[%i].mutex_audio\n", kd); + JOM(8, "returning %li\n", (long int)szret); + return szret; + +} +/*---------------------------------------------------------------------------*/ +static long easyoss_unlocked_ioctl(struct file *file, + unsigned int cmd, unsigned long arg) +{ + struct easycap *peasycap; + struct usb_device *p; + int kd; + + if (!file) { + SAY("ERROR: file 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\n"); + return -EFAULT; + } + p = peasycap->pusb_device; + if (!p) { + SAM("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_audio)) { + SAY("ERROR: cannot lock " + "easycapdc60_dongle[%i].mutex_audio\n", kd); + return -ERESTARTSYS; + } + JOM(4, "locked easycapdc60_dongle[%i].mutex_audio\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_audio); + return -ERESTARTSYS; + } + peasycap = file->private_data; + if (!peasycap) { + SAY("ERROR: peasycap is NULL\n"); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -ERESTARTSYS; + } + if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) { + SAY("ERROR: bad peasycap\n"); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + p = peasycap->pusb_device; + if (!peasycap->pusb_device) { + SAM("ERROR: peasycap->pusb_device is NULL\n"); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + 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; + } +/*---------------------------------------------------------------------------*/ + switch (cmd) { + case SNDCTL_DSP_GETCAPS: { + int caps; + JOM(8, "SNDCTL_DSP_GETCAPS\n"); + +#ifdef UPSAMPLE + if (peasycap->microphone) + caps = 0x04400000; + else + caps = 0x04400000; +#else + if (peasycap->microphone) + caps = 0x02400000; + else + caps = 0x04400000; +#endif /*UPSAMPLE*/ + + if (copy_to_user((void __user *)arg, &caps, sizeof(int))) { + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + break; + } + case SNDCTL_DSP_GETFMTS: { + int incoming; + JOM(8, "SNDCTL_DSP_GETFMTS\n"); + +#ifdef UPSAMPLE + if (peasycap->microphone) + incoming = AFMT_S16_LE; + else + incoming = AFMT_S16_LE; +#else + if (peasycap->microphone) + incoming = AFMT_S16_LE; + else + incoming = AFMT_S16_LE; +#endif /*UPSAMPLE*/ + + if (copy_to_user((void __user *)arg, &incoming, sizeof(int))) { + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + break; + } + case SNDCTL_DSP_SETFMT: { + int incoming, outgoing; + JOM(8, "SNDCTL_DSP_SETFMT\n"); + if (copy_from_user(&incoming, (void __user *)arg, sizeof(int))) { + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + JOM(8, "........... %i=incoming\n", incoming); + +#ifdef UPSAMPLE + if (peasycap->microphone) + outgoing = AFMT_S16_LE; + else + outgoing = AFMT_S16_LE; +#else + if (peasycap->microphone) + outgoing = AFMT_S16_LE; + else + outgoing = AFMT_S16_LE; +#endif /*UPSAMPLE*/ + + if (incoming != outgoing) { + JOM(8, "........... %i=outgoing\n", outgoing); + JOM(8, " cf. %i=AFMT_S16_LE\n", AFMT_S16_LE); + JOM(8, " cf. %i=AFMT_U8\n", AFMT_U8); + if (copy_to_user((void __user *)arg, &outgoing, sizeof(int))) { + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EINVAL ; + } + break; + } + case SNDCTL_DSP_STEREO: { + int incoming; + JOM(8, "SNDCTL_DSP_STEREO\n"); + if (copy_from_user(&incoming, (void __user *)arg, sizeof(int))) { + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + JOM(8, "........... %i=incoming\n", incoming); + +#ifdef UPSAMPLE + if (peasycap->microphone) + incoming = 1; + else + incoming = 1; +#else + if (peasycap->microphone) + incoming = 0; + else + incoming = 1; +#endif /*UPSAMPLE*/ + + if (copy_to_user((void __user *)arg, &incoming, sizeof(int))) { + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + break; + } + case SNDCTL_DSP_SPEED: { + int incoming; + JOM(8, "SNDCTL_DSP_SPEED\n"); + if (copy_from_user(&incoming, (void __user *)arg, sizeof(int))) { + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + JOM(8, "........... %i=incoming\n", incoming); + +#ifdef UPSAMPLE + if (peasycap->microphone) + incoming = 32000; + else + incoming = 48000; +#else + if (peasycap->microphone) + incoming = 8000; + else + incoming = 48000; +#endif /*UPSAMPLE*/ + + if (copy_to_user((void __user *)arg, &incoming, sizeof(int))) { + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + break; + } + case SNDCTL_DSP_GETTRIGGER: { + int incoming; + JOM(8, "SNDCTL_DSP_GETTRIGGER\n"); + if (copy_from_user(&incoming, (void __user *)arg, sizeof(int))) { + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + JOM(8, "........... %i=incoming\n", incoming); + + incoming = PCM_ENABLE_INPUT; + if (copy_to_user((void __user *)arg, &incoming, sizeof(int))) { + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + break; + } + case SNDCTL_DSP_SETTRIGGER: { + int incoming; + JOM(8, "SNDCTL_DSP_SETTRIGGER\n"); + if (copy_from_user(&incoming, (void __user *)arg, sizeof(int))) { + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + JOM(8, "........... %i=incoming\n", incoming); + JOM(8, "........... cf 0x%x=PCM_ENABLE_INPUT " + "0x%x=PCM_ENABLE_OUTPUT\n", + PCM_ENABLE_INPUT, PCM_ENABLE_OUTPUT); + ; + ; + ; + ; + break; + } + case SNDCTL_DSP_GETBLKSIZE: { + int incoming; + JOM(8, "SNDCTL_DSP_GETBLKSIZE\n"); + if (copy_from_user(&incoming, (void __user *)arg, sizeof(int))) { + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + JOM(8, "........... %i=incoming\n", incoming); + incoming = peasycap->audio_bytes_per_fragment; + if (copy_to_user((void __user *)arg, &incoming, sizeof(int))) { + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + break; + } + case SNDCTL_DSP_GETISPACE: { + struct audio_buf_info audio_buf_info; + + JOM(8, "SNDCTL_DSP_GETISPACE\n"); + + audio_buf_info.bytes = peasycap->audio_bytes_per_fragment; + audio_buf_info.fragments = 1; + audio_buf_info.fragsize = 0; + audio_buf_info.fragstotal = 0; + + if (copy_to_user((void __user *)arg, &audio_buf_info, sizeof(int))) { + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -EFAULT; + } + break; + } + case 0x00005401: + case 0x00005402: + case 0x00005403: + case 0x00005404: + case 0x00005405: + case 0x00005406: { + JOM(8, "SNDCTL_TMR_...: 0x%08X unsupported\n", cmd); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -ENOIOCTLCMD; + } + default: { + JOM(8, "ERROR: unrecognized DSP IOCTL command: 0x%08X\n", cmd); + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return -ENOIOCTLCMD; + } + } + mutex_unlock(&easycapdc60_dongle[kd].mutex_audio); + return 0; +} +/*****************************************************************************/ + +static const struct file_operations easyoss_fops = { + .owner = THIS_MODULE, + .open = easyoss_open, + .release = easyoss_release, + .unlocked_ioctl = easyoss_unlocked_ioctl, + .read = easyoss_read, + .llseek = no_llseek, +}; +struct usb_class_driver easyoss_class = { + .name = "usb/easyoss%d", + .fops = &easyoss_fops, + .minor_base = USB_SKEL_MINOR_BASE, +}; +/*****************************************************************************/ |