diff options
Diffstat (limited to 'sound/oss/audio.c')
| -rw-r--r-- | sound/oss/audio.c | 985 |
1 files changed, 0 insertions, 985 deletions
diff --git a/sound/oss/audio.c b/sound/oss/audio.c deleted file mode 100644 index 09c932f899b8..000000000000 --- a/sound/oss/audio.c +++ /dev/null @@ -1,985 +0,0 @@ -/* - * sound/oss/audio.c - * - * Device file manager for /dev/audio - */ - -/* - * Copyright (C) by Hannu Savolainen 1993-1997 - * - * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL) - * Version 2 (June 1991). See the "COPYING" file distributed with this software - * for more info. - */ -/* - * Thomas Sailer : ioctl code reworked (vmalloc/vfree removed) - * Thomas Sailer : moved several static variables into struct audio_operations - * (which is grossly misnamed btw.) because they have the same - * lifetime as the rest in there and dynamic allocation saves - * 12k or so - * Thomas Sailer : use more logical O_NONBLOCK semantics - * Daniel Rodriksson: reworked the use of the device specific copy_user - * still generic - * Horst von Brand: Add missing #include <linux/string.h> - * Chris Rankin : Update the module-usage counter for the coprocessor, - * and decrement the counters again if we cannot open - * the audio device. - */ - -#include <linux/stddef.h> -#include <linux/string.h> -#include <linux/kmod.h> - -#include "sound_config.h" -#include "ulaw.h" -#include "coproc.h" - -#define NEUTRAL8 0x80 -#define NEUTRAL16 0x00 - - -static int dma_ioctl(int dev, unsigned int cmd, void __user *arg); - -static int set_format(int dev, int fmt) -{ - if (fmt != AFMT_QUERY) - { - audio_devs[dev]->local_conversion = 0; - - if (!(audio_devs[dev]->format_mask & fmt)) /* Not supported */ - { - if (fmt == AFMT_MU_LAW) - { - fmt = AFMT_U8; - audio_devs[dev]->local_conversion = CNV_MU_LAW; - } - else - fmt = AFMT_U8; /* This is always supported */ - } - audio_devs[dev]->audio_format = audio_devs[dev]->d->set_bits(dev, fmt); - audio_devs[dev]->local_format = fmt; - } - else - return audio_devs[dev]->local_format; - - if (audio_devs[dev]->local_conversion) - return audio_devs[dev]->local_conversion; - else - return audio_devs[dev]->local_format; -} - -int audio_open(int dev, struct file *file) -{ - int ret; - int bits; - int dev_type = dev & 0x0f; - int mode = translate_mode(file); - const struct audio_driver *driver; - const struct coproc_operations *coprocessor; - - dev = dev >> 4; - - if (dev_type == SND_DEV_DSP16) - bits = 16; - else - bits = 8; - - if (dev < 0 || dev >= num_audiodevs) - return -ENXIO; - - driver = audio_devs[dev]->d; - - if (!try_module_get(driver->owner)) - return -ENODEV; - - if ((ret = DMAbuf_open(dev, mode)) < 0) - goto error_1; - - if ( (coprocessor = audio_devs[dev]->coproc) != NULL ) { - if (!try_module_get(coprocessor->owner)) - goto error_2; - - if ((ret = coprocessor->open(coprocessor->devc, COPR_PCM)) < 0) { - printk(KERN_WARNING "Sound: Can't access coprocessor device\n"); - goto error_3; - } - } - - audio_devs[dev]->local_conversion = 0; - - if (dev_type == SND_DEV_AUDIO) - set_format(dev, AFMT_MU_LAW); - else - set_format(dev, bits); - - audio_devs[dev]->audio_mode = AM_NONE; - - return 0; - - /* - * Clean-up stack: this is what needs (un)doing if - * we can't open the audio device ... - */ - error_3: - module_put(coprocessor->owner); - - error_2: - DMAbuf_release(dev, mode); - - error_1: - module_put(driver->owner); - - return ret; -} - -static void sync_output(int dev) -{ - int p, i; - int l; - struct dma_buffparms *dmap = audio_devs[dev]->dmap_out; - - if (dmap->fragment_size <= 0) - return; - dmap->flags |= DMA_POST; - - /* Align the write pointer with fragment boundaries */ - - if ((l = dmap->user_counter % dmap->fragment_size) > 0) - { - int len; - unsigned long offs = dmap->user_counter % dmap->bytes_in_use; - - len = dmap->fragment_size - l; - memset(dmap->raw_buf + offs, dmap->neutral_byte, len); - DMAbuf_move_wrpointer(dev, len); - } - - /* - * Clean all unused buffer fragments. - */ - - p = dmap->qtail; - dmap->flags |= DMA_POST; - - for (i = dmap->qlen + 1; i < dmap->nbufs; i++) - { - p = (p + 1) % dmap->nbufs; - if (((dmap->raw_buf + p * dmap->fragment_size) + dmap->fragment_size) > - (dmap->raw_buf + dmap->buffsize)) - printk(KERN_ERR "audio: Buffer error 2\n"); - - memset(dmap->raw_buf + p * dmap->fragment_size, - dmap->neutral_byte, - dmap->fragment_size); - } - - dmap->flags |= DMA_DIRTY; -} - -void audio_release(int dev, struct file *file) -{ - const struct coproc_operations *coprocessor; - int mode = translate_mode(file); - - dev = dev >> 4; - - /* - * We do this in DMAbuf_release(). Why are we doing it - * here? Why don't we test the file mode before setting - * both flags? DMAbuf_release() does. - * ...pester...pester...pester... - */ - audio_devs[dev]->dmap_out->closing = 1; - audio_devs[dev]->dmap_in->closing = 1; - - /* - * We need to make sure we allocated the dmap_out buffer - * before we go mucking around with it in sync_output(). - */ - if (mode & OPEN_WRITE) - sync_output(dev); - - if ( (coprocessor = audio_devs[dev]->coproc) != NULL ) { - coprocessor->close(coprocessor->devc, COPR_PCM); - module_put(coprocessor->owner); - } - DMAbuf_release(dev, mode); - - module_put(audio_devs[dev]->d->owner); -} - -static void translate_bytes(const unsigned char *table, unsigned char *buff, int n) -{ - unsigned long i; - - if (n <= 0) - return; - - for (i = 0; i < n; ++i) - buff[i] = table[buff[i]]; -} - -int audio_write(int dev, struct file *file, const char __user *buf, int count) -{ - int c, p, l, buf_size, used, returned; - int err; - char *dma_buf; - - dev = dev >> 4; - - p = 0; - c = count; - - if(count < 0) - return -EINVAL; - - if (!(audio_devs[dev]->open_mode & OPEN_WRITE)) - return -EPERM; - - if (audio_devs[dev]->flags & DMA_DUPLEX) - audio_devs[dev]->audio_mode |= AM_WRITE; - else - audio_devs[dev]->audio_mode = AM_WRITE; - - if (!count) /* Flush output */ - { - sync_output(dev); - return 0; - } - - while (c) - { - if ((err = DMAbuf_getwrbuffer(dev, &dma_buf, &buf_size, !!(file->f_flags & O_NONBLOCK))) < 0) - { - /* Handle nonblocking mode */ - if ((file->f_flags & O_NONBLOCK) && err == -EAGAIN) - return p? p : -EAGAIN; /* No more space. Return # of accepted bytes */ - return err; - } - l = c; - - if (l > buf_size) - l = buf_size; - - returned = l; - used = l; - if (!audio_devs[dev]->d->copy_user) - { - if ((dma_buf + l) > - (audio_devs[dev]->dmap_out->raw_buf + audio_devs[dev]->dmap_out->buffsize)) - { - printk(KERN_ERR "audio: Buffer error 3 (%lx,%d), (%lx, %d)\n", (long) dma_buf, l, (long) audio_devs[dev]->dmap_out->raw_buf, (int) audio_devs[dev]->dmap_out->buffsize); - return -EDOM; - } - if (dma_buf < audio_devs[dev]->dmap_out->raw_buf) - { - printk(KERN_ERR "audio: Buffer error 13 (%lx<%lx)\n", (long) dma_buf, (long) audio_devs[dev]->dmap_out->raw_buf); - return -EDOM; - } - if(copy_from_user(dma_buf, &(buf)[p], l)) - return -EFAULT; - } - else audio_devs[dev]->d->copy_user (dev, - dma_buf, 0, - buf, p, - c, buf_size, - &used, &returned, - l); - l = returned; - - if (audio_devs[dev]->local_conversion & CNV_MU_LAW) - { - translate_bytes(ulaw_dsp, (unsigned char *) dma_buf, l); - } - c -= used; - p += used; - DMAbuf_move_wrpointer(dev, l); - - } - - return count; -} - -int audio_read(int dev, struct file *file, char __user *buf, int count) -{ - int c, p, l; - char *dmabuf; - int buf_no; - - dev = dev >> 4; - p = 0; - c = count; - - if (!(audio_devs[dev]->open_mode & OPEN_READ)) - return -EPERM; - - if ((audio_devs[dev]->audio_mode & AM_WRITE) && !(audio_devs[dev]->flags & DMA_DUPLEX)) - sync_output(dev); - - if (audio_devs[dev]->flags & DMA_DUPLEX) - audio_devs[dev]->audio_mode |= AM_READ; - else - audio_devs[dev]->audio_mode = AM_READ; - - while(c) - { - if ((buf_no = DMAbuf_getrdbuffer(dev, &dmabuf, &l, !!(file->f_flags & O_NONBLOCK))) < 0) - { - /* - * Nonblocking mode handling. Return current # of bytes - */ - - if (p > 0) /* Avoid throwing away data */ - return p; /* Return it instead */ - - if ((file->f_flags & O_NONBLOCK) && buf_no == -EAGAIN) - return -EAGAIN; - - return buf_no; - } - if (l > c) - l = c; - - /* - * Insert any local processing here. - */ - - if (audio_devs[dev]->local_conversion & CNV_MU_LAW) - { - translate_bytes(dsp_ulaw, (unsigned char *) dmabuf, l); - } - - { - char *fixit = dmabuf; - - if(copy_to_user(&(buf)[p], fixit, l)) - return -EFAULT; - } - - DMAbuf_rmchars(dev, buf_no, l); - - p += l; - c -= l; - } - - return count - c; -} - -int audio_ioctl(int dev, struct file *file, unsigned int cmd, void __user *arg) -{ - int val, count; - unsigned long flags; - struct dma_buffparms *dmap; - int __user *p = arg; - - dev = dev >> 4; - - if (_IOC_TYPE(cmd) == 'C') { - if (audio_devs[dev]->coproc) /* Coprocessor ioctl */ - return audio_devs[dev]->coproc->ioctl(audio_devs[dev]->coproc->devc, cmd, arg, 0); - /* else - printk(KERN_DEBUG"/dev/dsp%d: No coprocessor for this device\n", dev); */ - return -ENXIO; - } - else switch (cmd) - { - case SNDCTL_DSP_SYNC: - if (!(audio_devs[dev]->open_mode & OPEN_WRITE)) - return 0; - if (audio_devs[dev]->dmap_out->fragment_size == 0) - return 0; - sync_output(dev); - DMAbuf_sync(dev); - DMAbuf_reset(dev); - return 0; - - case SNDCTL_DSP_POST: - if (!(audio_devs[dev]->open_mode & OPEN_WRITE)) - return 0; - if (audio_devs[dev]->dmap_out->fragment_size == 0) - return 0; - audio_devs[dev]->dmap_out->flags |= DMA_POST | DMA_DIRTY; - sync_output(dev); - dma_ioctl(dev, SNDCTL_DSP_POST, NULL); - return 0; - - case SNDCTL_DSP_RESET: - audio_devs[dev]->audio_mode = AM_NONE; - DMAbuf_reset(dev); - return 0; - - case SNDCTL_DSP_GETFMTS: - val = audio_devs[dev]->format_mask | AFMT_MU_LAW; - break; - - case SNDCTL_DSP_SETFMT: - if (get_user(val, p)) - return -EFAULT; - val = set_format(dev, val); - break; - - case SNDCTL_DSP_GETISPACE: - if (!(audio_devs[dev]->open_mode & OPEN_READ)) - return 0; - if ((audio_devs[dev]->audio_mode & AM_WRITE) && !(audio_devs[dev]->flags & DMA_DUPLEX)) - return -EBUSY; - return dma_ioctl(dev, cmd, arg); - - case SNDCTL_DSP_GETOSPACE: - if (!(audio_devs[dev]->open_mode & OPEN_WRITE)) - return -EPERM; - if ((audio_devs[dev]->audio_mode & AM_READ) && !(audio_devs[dev]->flags & DMA_DUPLEX)) - return -EBUSY; - return dma_ioctl(dev, cmd, arg); - - case SNDCTL_DSP_NONBLOCK: - spin_lock(&file->f_lock); - file->f_flags |= O_NONBLOCK; - spin_unlock(&file->f_lock); - return 0; - - case SNDCTL_DSP_GETCAPS: - val = 1 | DSP_CAP_MMAP; /* Revision level of this ioctl() */ - if (audio_devs[dev]->flags & DMA_DUPLEX && - audio_devs[dev]->open_mode == OPEN_READWRITE) - val |= DSP_CAP_DUPLEX; - if (audio_devs[dev]->coproc) - val |= DSP_CAP_COPROC; - if (audio_devs[dev]->d->local_qlen) /* Device has hidden buffers */ - val |= DSP_CAP_BATCH; - if (audio_devs[dev]->d->trigger) /* Supports SETTRIGGER */ - val |= DSP_CAP_TRIGGER; - break; - - case SOUND_PCM_WRITE_RATE: - if (get_user(val, p)) - return -EFAULT; - val = audio_devs[dev]->d->set_speed(dev, val); - break; - - case SOUND_PCM_READ_RATE: - val = audio_devs[dev]->d->set_speed(dev, 0); - break; - - case SNDCTL_DSP_STEREO: - if (get_user(val, p)) - return -EFAULT; - if (val > 1 || val < 0) - return -EINVAL; - val = audio_devs[dev]->d->set_channels(dev, val + 1) - 1; - break; - - case SOUND_PCM_WRITE_CHANNELS: - if (get_user(val, p)) - return -EFAULT; - val = audio_devs[dev]->d->set_channels(dev, val); - break; - - case SOUND_PCM_READ_CHANNELS: - val = audio_devs[dev]->d->set_channels(dev, 0); - break; - - case SOUND_PCM_READ_BITS: - val = audio_devs[dev]->d->set_bits(dev, 0); - break; - - case SNDCTL_DSP_SETDUPLEX: - if (audio_devs[dev]->open_mode != OPEN_READWRITE) - return -EPERM; - return (audio_devs[dev]->flags & DMA_DUPLEX) ? 0 : -EIO; - - case SNDCTL_DSP_PROFILE: - if (get_user(val, p)) - return -EFAULT; - if (audio_devs[dev]->open_mode & OPEN_WRITE) - audio_devs[dev]->dmap_out->applic_profile = val; - if (audio_devs[dev]->open_mode & OPEN_READ) - audio_devs[dev]->dmap_in->applic_profile = val; - return 0; - - case SNDCTL_DSP_GETODELAY: - dmap = audio_devs[dev]->dmap_out; - if (!(audio_devs[dev]->open_mode & OPEN_WRITE)) - return -EINVAL; - if (!(dmap->flags & DMA_ALLOC_DONE)) - { - val=0; - break; - } - - spin_lock_irqsave(&dmap->lock,flags); - /* Compute number of bytes that have been played */ - count = DMAbuf_get_buffer_pointer (dev, dmap, DMODE_OUTPUT); - if (count < dmap->fragment_size && dmap->qhead != 0) - count += dmap->bytes_in_use; /* Pointer wrap not handled yet */ - count += dmap->byte_counter; - - /* Subtract current count from the number of bytes written by app */ - count = dmap->user_counter - count; - if (count < 0) - count = 0; - spin_unlock_irqrestore(&dmap->lock,flags); - val = count; - break; - - default: - return dma_ioctl(dev, cmd, arg); - } - return put_user(val, p); -} - -void audio_init_devices(void) -{ - /* - * NOTE! This routine could be called several times during boot. - */ -} - -void reorganize_buffers(int dev, struct dma_buffparms *dmap, int recording) -{ - /* - * This routine breaks the physical device buffers to logical ones. - */ - - struct audio_operations *dsp_dev = audio_devs[dev]; - - unsigned i, n; - unsigned sr, nc, sz, bsz; - - sr = dsp_dev->d->set_speed(dev, 0); - nc = dsp_dev->d->set_channels(dev, 0); - sz = dsp_dev->d->set_bits(dev, 0); - - if (sz == 8) - dmap->neutral_byte = NEUTRAL8; - else - dmap->neutral_byte = NEUTRAL16; - - if (sr < 1 || nc < 1 || sz < 1) - { -/* printk(KERN_DEBUG "Warning: Invalid PCM parameters[%d] sr=%d, nc=%d, sz=%d\n", dev, sr, nc, sz);*/ - sr = DSP_DEFAULT_SPEED; - nc = 1; - sz = 8; - } - - sz = sr * nc * sz; - - sz /= 8; /* #bits -> #bytes */ - dmap->data_rate = sz; - - if (!dmap->needs_reorg) - return; - dmap->needs_reorg = 0; - - if (dmap->fragment_size == 0) - { - /* Compute the fragment size using the default algorithm */ - - /* - * Compute a buffer size for time not exceeding 1 second. - * Usually this algorithm gives a buffer size for 0.5 to 1.0 seconds - * of sound (using the current speed, sample size and #channels). - */ - - bsz = dmap->buffsize; - while (bsz > sz) - bsz /= 2; - - if (bsz == dmap->buffsize) - bsz /= 2; /* Needs at least 2 buffers */ - - /* - * Split the computed fragment to smaller parts. After 3.5a9 - * the default subdivision is 4 which should give better - * results when recording. - */ - - if (dmap->subdivision == 0) /* Not already set */ - { - dmap->subdivision = 4; /* Init to the default value */ - - if ((bsz / dmap->subdivision) > 4096) - dmap->subdivision *= 2; - if ((bsz / dmap->subdivision) < 4096) - dmap->subdivision = 1; - } - bsz /= dmap->subdivision; - - if (bsz < 16) - bsz = 16; /* Just a sanity check */ - - dmap->fragment_size = bsz; - } - else - { - /* - * The process has specified the buffer size with SNDCTL_DSP_SETFRAGMENT or - * the buffer size computation has already been done. - */ - if (dmap->fragment_size > (dmap->buffsize / 2)) - dmap->fragment_size = (dmap->buffsize / 2); - bsz = dmap->fragment_size; - } - - if (audio_devs[dev]->min_fragment) - if (bsz < (1 << audio_devs[dev]->min_fragment)) - bsz = 1 << audio_devs[dev]->min_fragment; - if (audio_devs[dev]->max_fragment) - if (bsz > (1 << audio_devs[dev]->max_fragment)) - bsz = 1 << audio_devs[dev]->max_fragment; - bsz &= ~0x07; /* Force size which is multiple of 8 bytes */ -#ifdef OS_DMA_ALIGN_CHECK - OS_DMA_ALIGN_CHECK(bsz); -#endif - - n = dmap->buffsize / bsz; - if (n > MAX_SUB_BUFFERS) - n = MAX_SUB_BUFFERS; - if (n > dmap->max_fragments) - n = dmap->max_fragments; - - if (n < 2) - { - n = 2; - bsz /= 2; - } - dmap->nbufs = n; - dmap->bytes_in_use = n * bsz; - dmap->fragment_size = bsz; - dmap->max_byte_counter = (dmap->data_rate * 60 * 60) + - dmap->bytes_in_use; /* Approximately one hour */ - - if (dmap->raw_buf) - { - memset(dmap->raw_buf, dmap->neutral_byte, dmap->bytes_in_use); - } - - for (i = 0; i < dmap->nbufs; i++) - { - dmap->counts[i] = 0; - } - - dmap->flags |= DMA_ALLOC_DONE | DMA_EMPTY; -} - -static int dma_subdivide(int dev, struct dma_buffparms *dmap, int fact) -{ - if (fact == 0) - { - fact = dmap->subdivision; - if (fact == 0) - fact = 1; - return fact; - } - if (dmap->subdivision != 0 || dmap->fragment_size) /* Too late to change */ - return -EINVAL; - - if (fact > MAX_REALTIME_FACTOR) - return -EINVAL; - - if (fact != 1 && fact != 2 && fact != 4 && fact != 8 && fact != 16) - return -EINVAL; - - dmap->subdivision = fact; - return fact; -} - -static int dma_set_fragment(int dev, struct dma_buffparms *dmap, int fact) -{ - int bytes, count; - - if (fact == 0) - return -EIO; - - if (dmap->subdivision != 0 || - dmap->fragment_size) /* Too late to change */ - return -EINVAL; - - bytes = fact & 0xffff; - count = (fact >> 16) & 0x7fff; - - if (count == 0) - count = MAX_SUB_BUFFERS; - else if (count < MAX_SUB_BUFFERS) - count++; - - if (bytes < 4 || bytes > 17) /* <16 || > 512k */ - return -EINVAL; - - if (count < 2) - return -EINVAL; - - if (audio_devs[dev]->min_fragment > 0) - if (bytes < audio_devs[dev]->min_fragment) - bytes = audio_devs[dev]->min_fragment; - - if (audio_devs[dev]->max_fragment > 0) - if (bytes > audio_devs[dev]->max_fragment) - bytes = audio_devs[dev]->max_fragment; - -#ifdef OS_DMA_MINBITS - if (bytes < OS_DMA_MINBITS) - bytes = OS_DMA_MINBITS; -#endif - - dmap->fragment_size = (1 << bytes); - dmap->max_fragments = count; - - if (dmap->fragment_size > dmap->buffsize) - dmap->fragment_size = dmap->buffsize; - - if (dmap->fragment_size == dmap->buffsize && - audio_devs[dev]->flags & DMA_AUTOMODE) - dmap->fragment_size /= 2; /* Needs at least 2 buffers */ - - dmap->subdivision = 1; /* Disable SNDCTL_DSP_SUBDIVIDE */ - return bytes | ((count - 1) << 16); -} - -static int dma_ioctl(int dev, unsigned int cmd, void __user *arg) -{ - struct dma_buffparms *dmap_out = audio_devs[dev]->dmap_out; - struct dma_buffparms *dmap_in = audio_devs[dev]->dmap_in; - struct dma_buffparms *dmap; - audio_buf_info info; - count_info cinfo; - int fact, ret, changed, bits, count, err; - unsigned long flags; - - switch (cmd) - { - case SNDCTL_DSP_SUBDIVIDE: - ret = 0; - if (get_user(fact, (int __user *)arg)) - return -EFAULT; - if (audio_devs[dev]->open_mode & OPEN_WRITE) - ret = dma_subdivide(dev, dmap_out, fact); - if (ret < 0) - return ret; - if (audio_devs[dev]->open_mode != OPEN_WRITE || - (audio_devs[dev]->flags & DMA_DUPLEX && - audio_devs[dev]->open_mode & OPEN_READ)) - ret = dma_subdivide(dev, dmap_in, fact); - if (ret < 0) - return ret; - break; - - case SNDCTL_DSP_GETISPACE: - case SNDCTL_DSP_GETOSPACE: - dmap = dmap_out; - if (cmd == SNDCTL_DSP_GETISPACE && !(audio_devs[dev]->open_mode & OPEN_READ)) - return -EINVAL; - if (cmd == SNDCTL_DSP_GETOSPACE && !(audio_devs[dev]->open_mode & OPEN_WRITE)) - return -EINVAL; - if (cmd == SNDCTL_DSP_GETISPACE && audio_devs[dev]->flags & DMA_DUPLEX) - dmap = dmap_in; - if (dmap->mapping_flags & DMA_MAP_MAPPED) - return -EINVAL; - if (!(dmap->flags & DMA_ALLOC_DONE)) - reorganize_buffers(dev, dmap, (cmd == SNDCTL_DSP_GETISPACE)); - info.fragstotal = dmap->nbufs; - if (cmd == SNDCTL_DSP_GETISPACE) - info.fragments = dmap->qlen; - else - { - if (!DMAbuf_space_in_queue(dev)) - info.fragments = 0; - else - { - info.fragments = DMAbuf_space_in_queue(dev); - if (audio_devs[dev]->d->local_qlen) - { - int tmp = audio_devs[dev]->d->local_qlen(dev); - if (tmp && info.fragments) - tmp--; /* - * This buffer has been counted twice - */ - info.fragments -= tmp; - } - } - } - if (info.fragments < 0) - info.fragments = 0; - else if (info.fragments > dmap->nbufs) - info.fragments = dmap->nbufs; - - info.fragsize = dmap->fragment_size; - info.bytes = info.fragments * dmap->fragment_size; - - if (cmd == SNDCTL_DSP_GETISPACE && dmap->qlen) - info.bytes -= dmap->counts[dmap->qhead]; - else - { - info.fragments = info.bytes / dmap->fragment_size; - info.bytes -= dmap->user_counter % dmap->fragment_size; - } - if (copy_to_user(arg, &info, sizeof(info))) - return -EFAULT; - return 0; - - case SNDCTL_DSP_SETTRIGGER: - if (get_user(bits, (int __user *)arg)) - return -EFAULT; - bits &= audio_devs[dev]->open_mode; - if (audio_devs[dev]->d->trigger == NULL) - return -EINVAL; - if (!(audio_devs[dev]->flags & DMA_DUPLEX) && (bits & PCM_ENABLE_INPUT) && - (bits & PCM_ENABLE_OUTPUT)) - return -EINVAL; - - if (bits & PCM_ENABLE_INPUT) - { - spin_lock_irqsave(&dmap_in->lock,flags); - changed = (audio_devs[dev]->enable_bits ^ bits) & PCM_ENABLE_INPUT; - if (changed && audio_devs[dev]->go) - { - reorganize_buffers(dev, dmap_in, 1); - if ((err = audio_devs[dev]->d->prepare_for_input(dev, - dmap_in->fragment_size, dmap_in->nbufs)) < 0) { - spin_unlock_irqrestore(&dmap_in->lock,flags); - return err; - } - dmap_in->dma_mode = DMODE_INPUT; - audio_devs[dev]->enable_bits |= PCM_ENABLE_INPUT; - DMAbuf_activate_recording(dev, dmap_in); - } else - audio_devs[dev]->enable_bits &= ~PCM_ENABLE_INPUT; - spin_unlock_irqrestore(&dmap_in->lock,flags); - } - if (bits & PCM_ENABLE_OUTPUT) - { - spin_lock_irqsave(&dmap_out->lock,flags); - changed = (audio_devs[dev]->enable_bits ^ bits) & PCM_ENABLE_OUTPUT; - if (changed && - (dmap_out->mapping_flags & DMA_MAP_MAPPED || dmap_out->qlen > 0) && - audio_devs[dev]->go) - { - if (!(dmap_out->flags & DMA_ALLOC_DONE)) - reorganize_buffers(dev, dmap_out, 0); - dmap_out->dma_mode = DMODE_OUTPUT; - audio_devs[dev]->enable_bits |= PCM_ENABLE_OUTPUT; - dmap_out->counts[dmap_out->qhead] = dmap_out->fragment_size; - DMAbuf_launch_output(dev, dmap_out); - } else - audio_devs[dev]->enable_bits &= ~PCM_ENABLE_OUTPUT; - spin_unlock_irqrestore(&dmap_out->lock,flags); - } -#if 0 - if (changed && audio_devs[dev]->d->trigger) - audio_devs[dev]->d->trigger(dev, bits * audio_devs[dev]->go); -#endif - /* Falls through... */ - - case SNDCTL_DSP_GETTRIGGER: - ret = audio_devs[dev]->enable_bits; - break; - - case SNDCTL_DSP_SETSYNCRO: - if (!audio_devs[dev]->d->trigger) - return -EINVAL; - audio_devs[dev]->d->trigger(dev, 0); - audio_devs[dev]->go = 0; - return 0; - - case SNDCTL_DSP_GETIPTR: - if (!(audio_devs[dev]->open_mode & OPEN_READ)) - return -EINVAL; - spin_lock_irqsave(&dmap_in->lock,flags); - cinfo.bytes = dmap_in->byte_counter; - cinfo.ptr = DMAbuf_get_buffer_pointer(dev, dmap_in, DMODE_INPUT) & ~3; - if (cinfo.ptr < dmap_in->fragment_size && dmap_in->qtail != 0) - cinfo.bytes += dmap_in->bytes_in_use; /* Pointer wrap not handled yet */ - cinfo.blocks = dmap_in->qlen; - cinfo.bytes += cinfo.ptr; - if (dmap_in->mapping_flags & DMA_MAP_MAPPED) - dmap_in->qlen = 0; /* Reset interrupt counter */ - spin_unlock_irqrestore(&dmap_in->lock,flags); - if (copy_to_user(arg, &cinfo, sizeof(cinfo))) - return -EFAULT; - return 0; - - case SNDCTL_DSP_GETOPTR: - if (!(audio_devs[dev]->open_mode & OPEN_WRITE)) - return -EINVAL; - - spin_lock_irqsave(&dmap_out->lock,flags); - cinfo.bytes = dmap_out->byte_counter; - cinfo.ptr = DMAbuf_get_buffer_pointer(dev, dmap_out, DMODE_OUTPUT) & ~3; - if (cinfo.ptr < dmap_out->fragment_size && dmap_out->qhead != 0) - cinfo.bytes += dmap_out->bytes_in_use; /* Pointer wrap not handled yet */ - cinfo.blocks = dmap_out->qlen; - cinfo.bytes += cinfo.ptr; - if (dmap_out->mapping_flags & DMA_MAP_MAPPED) - dmap_out->qlen = 0; /* Reset interrupt counter */ - spin_unlock_irqrestore(&dmap_out->lock,flags); - if (copy_to_user(arg, &cinfo, sizeof(cinfo))) - return -EFAULT; - return 0; - - case SNDCTL_DSP_GETODELAY: - if (!(audio_devs[dev]->open_mode & OPEN_WRITE)) - return -EINVAL; - if (!(dmap_out->flags & DMA_ALLOC_DONE)) - { - ret=0; - break; - } - spin_lock_irqsave(&dmap_out->lock,flags); - /* Compute number of bytes that have been played */ - count = DMAbuf_get_buffer_pointer (dev, dmap_out, DMODE_OUTPUT); - if (count < dmap_out->fragment_size && dmap_out->qhead != 0) - count += dmap_out->bytes_in_use; /* Pointer wrap not handled yet */ - count += dmap_out->byte_counter; - /* Subtract current count from the number of bytes written by app */ - count = dmap_out->user_counter - count; - if (count < 0) - count = 0; - spin_unlock_irqrestore(&dmap_out->lock,flags); - ret = count; - break; - - case SNDCTL_DSP_POST: - if (audio_devs[dev]->dmap_out->qlen > 0) - if (!(audio_devs[dev]->dmap_out->flags & DMA_ACTIVE)) - DMAbuf_launch_output(dev, audio_devs[dev]->dmap_out); - return 0; - - case SNDCTL_DSP_GETBLKSIZE: - dmap = dmap_out; - if (audio_devs[dev]->open_mode & OPEN_WRITE) - reorganize_buffers(dev, dmap_out, (audio_devs[dev]->open_mode == OPEN_READ)); - if (audio_devs[dev]->open_mode == OPEN_READ || - (audio_devs[dev]->flags & DMA_DUPLEX && - audio_devs[dev]->open_mode & OPEN_READ)) - reorganize_buffers(dev, dmap_in, (audio_devs[dev]->open_mode == OPEN_READ)); - if (audio_devs[dev]->open_mode == OPEN_READ) - dmap = dmap_in; - ret = dmap->fragment_size; - break; - - case SNDCTL_DSP_SETFRAGMENT: - ret = 0; - if (get_user(fact, (int __user *)arg)) - return -EFAULT; - if (audio_devs[dev]->open_mode & OPEN_WRITE) - ret = dma_set_fragment(dev, dmap_out, fact); - if (ret < 0) - return ret; - if (audio_devs[dev]->open_mode == OPEN_READ || - (audio_devs[dev]->flags & DMA_DUPLEX && - audio_devs[dev]->open_mode & OPEN_READ)) - ret = dma_set_fragment(dev, dmap_in, fact); - if (ret < 0) - return ret; - if (!arg) /* don't know what this is good for, but preserve old semantics */ - return 0; - break; - - default: - if (!audio_devs[dev]->d->ioctl) - return -EINVAL; - return audio_devs[dev]->d->ioctl(dev, cmd, arg); - } - return put_user(ret, (int __user *)arg); -} |