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