+++ /dev/null
-/*
- * 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);
-}
git.samba.org / sfrench / cifs-2.6.git / blobdiff