URL https://opencores.org/ocsvn/or1k_old/or1k_old/trunk

Subversion Repositories or1k_old

[/] [or1k_old/] [trunk/] [uclinux/] [uClinux-2.0.x/] [drivers/] [sound/] [audio.c] - Blame information for rev 199

Go to most recent revision | Details | Compare with Previous | View Log


/*
 * sound/audio.c
 *
 * Device file manager for /dev/audio
 */
 
/*
 * Copyright (C) by Hannu Savolainen 1993-1996
 *
 * USS/Lite 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.
 */
#include <linux/config.h>
 
 
#include "sound_config.h"
 
#ifdef CONFIG_AUDIO
 
#include "ulaw.h"
#include "coproc.h"
 
#define ON              1
#define OFF             0
 
static int      audio_mode[MAX_AUDIO_DEV];
static int      dev_nblock[MAX_AUDIO_DEV];      /* 1 if in nonblocking mode */
 
#define         AM_NONE         0
#define         AM_WRITE        1
#define         AM_READ         2
 
static int      audio_format[MAX_AUDIO_DEV];
static int      local_conversion[MAX_AUDIO_DEV];
 
static int
set_format (int dev, long fmt)
{
  if (fmt != AFMT_QUERY)
    {
 
      local_conversion[dev] = 0;
 
      if (!(audio_devs[dev]->format_mask & fmt))        /* Not supported */
        if (fmt == AFMT_MU_LAW)
          {
            fmt = AFMT_U8;
            local_conversion[dev] = AFMT_MU_LAW;
          }
        else
          fmt = AFMT_U8;        /* This is always supported */
 
      audio_format[dev] = DMAbuf_ioctl (dev, SNDCTL_DSP_SETFMT, (caddr_t) fmt, 1);
    }
 
  if (local_conversion[dev])    /* This shadows the HW format */
    return local_conversion[dev];
 
  return audio_format[dev];
}
 
int
audio_open (int dev, struct fileinfo *file)
{
  int             ret;
  long            bits;
  int             dev_type = dev & 0x0f;
  int             mode = file->mode & O_ACCMODE;
 
  dev = dev >> 4;
 
  if (dev_type == SND_DEV_DSP16)
    bits = 16;
  else
    bits = 8;
 
  if ((ret = DMAbuf_open (dev, mode)) < 0)
    return ret;
 
  if (audio_devs[dev]->coproc)
    if ((ret = audio_devs[dev]->coproc->
         open (audio_devs[dev]->coproc->devc, COPR_PCM)) < 0)
      {
        audio_release (dev, file);
        printk ("Sound: Can't access coprocessor device\n");
 
        return ret;
      }
 
  local_conversion[dev] = 0;
 
  if (DMAbuf_ioctl (dev, SNDCTL_DSP_SETFMT, (caddr_t) bits, 1) != bits)
    {
      printk ("audio: Can't set number of bits on device %d\n", dev);
      audio_release (dev, file);
      return -(ENXIO);
    }
 
  if (dev_type == SND_DEV_AUDIO)
    {
      set_format (dev, AFMT_MU_LAW);
    }
  else
    set_format (dev, bits);
 
  audio_mode[dev] = AM_NONE;
  dev_nblock[dev] = 0;
 
  return ret;
}
 
void
sync_output (int dev)
{
  int             buf_no, buf_ptr, buf_size, p, i;
  char           *dma_buf;
  struct dma_buffparms *dmap = audio_devs[dev]->dmap_out;
 
  if (DMAbuf_get_curr_buffer (dev, &buf_no, &dma_buf, &buf_ptr, &buf_size) >= 0)
    {
      DMAbuf_start_output (dev, buf_no, buf_ptr);
    }
 
/*
 * Clean all unused buffer fragments.
 */
 
  p = dmap->qtail;
 
  for (i = dmap->qlen + 1; i < dmap->nbufs; i++)
    {
      memset (dmap->raw_buf + p * dmap->fragment_size,
              dmap->neutral_byte,
              dmap->fragment_size);
 
      p = (p + 1) % dmap->nbufs;
    }
 
  dmap->flags |= DMA_CLEAN;
}
 
void
audio_release (int dev, struct fileinfo *file)
{
  int             mode;
 
  dev = dev >> 4;
  mode = file->mode & O_ACCMODE;
 
  audio_devs[dev]->dmap_out->closing = 1;
  audio_devs[dev]->dmap_in->closing = 1;
 
  sync_output (dev);
 
  if (audio_devs[dev]->coproc)
    audio_devs[dev]->coproc->close (audio_devs[dev]->coproc->devc, COPR_PCM);
  DMAbuf_release (dev, mode);
}
 
#if defined(NO_INLINE_ASM) || !defined(i386)
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]];
}
 
#else
extern inline void
translate_bytes (const void *table, void *buff, int n)
{
  if (n > 0)
    {
      __asm__ ("cld\n"
               "1:\tlodsb\n\t"
               "xlatb\n\t"
               "stosb\n\t"
    "loop 1b\n\t":
    :      "b" ((long) table), "c" (n), "D" ((long) buff), "S" ((long) buff)
    :          "bx", "cx", "di", "si", "ax");
    }
}
 
#endif
 
int
audio_write (int dev, struct fileinfo *file, const char *buf, int count)
{
  int             c, p, l, buf_no, buf_ptr, buf_size;
  int             err;
  char           *dma_buf;
 
  dev = dev >> 4;
 
  p = 0;
  c = count;
 
  if (count < 0)
    return -EINVAL;
 
  if ((audio_mode[dev] & AM_READ) && !(audio_devs[dev]->flags & DMA_DUPLEX))
    {                           /* Direction change */
    }
 
  if (audio_devs[dev]->flags & DMA_DUPLEX)
    audio_mode[dev] |= AM_WRITE;
  else
    audio_mode[dev] = AM_WRITE;
 
  if (!count)                   /* Flush output */
    {
      sync_output (dev);
      return 0;
    }
 
  while (c)
    {
      if (DMAbuf_get_curr_buffer (dev, &buf_no, &dma_buf, &buf_ptr, &buf_size) < 0)
        {
          if ((buf_no = DMAbuf_getwrbuffer (dev, &dma_buf,
                                            &buf_size,
                                            dev_nblock[dev])) < 0)
            {
              /* Handle nonblocking mode */
              if (dev_nblock[dev] && buf_no == -(EAGAIN))
                return p;       /* No more space. Return # of accepted bytes */
              return buf_no;
            }
          buf_ptr = 0;
        }
 
      l = c;
      if (l > (buf_size - buf_ptr))
        l = (buf_size - buf_ptr);
 
      if (!audio_devs[dev]->d->copy_from_user)
        {                       /*
                                 * No device specific copy routine
                                 */
          memcpy_fromfs (&dma_buf[buf_ptr], &(buf)[p], l);
        }
      else
        audio_devs[dev]->d->copy_from_user (dev,
                                            dma_buf, buf_ptr, buf, p, l);
 
      if (local_conversion[dev] == AFMT_MU_LAW)
        {
          /*
           * This just allows interrupts while the conversion is running
           */
          sti ();
          translate_bytes (ulaw_dsp, (unsigned char *) &dma_buf[buf_ptr], l);
        }
 
      c -= l;
      p += l;
      buf_ptr += l;
 
      if (buf_ptr >= buf_size)
        {
          if ((err = DMAbuf_start_output (dev, buf_no, buf_ptr)) < 0)
            {
              return err;
            }
 
        }
      else
        DMAbuf_set_count (dev, buf_no, buf_ptr);
 
    }
 
  return count;
}
 
int
audio_read (int dev, struct fileinfo *file, char *buf, int count)
{
  int             c, p, l;
  char           *dmabuf;
  int             buf_no;
 
  dev = dev >> 4;
  p = 0;
  c = count;
 
  if ((audio_mode[dev] & AM_WRITE) && !(audio_devs[dev]->flags & DMA_DUPLEX))
    {
      sync_output (dev);
    }
 
  if (audio_devs[dev]->flags & DMA_DUPLEX)
    audio_mode[dev] |= AM_READ;
  else
    audio_mode[dev] = AM_READ;
 
  while (c)
    {
      if ((buf_no = DMAbuf_getrdbuffer (dev, &dmabuf, &l,
                                        dev_nblock[dev])) < 0)
        {
          /* Nonblocking mode handling. Return current # of bytes */
 
          if (dev_nblock[dev] && buf_no == -(EAGAIN))
            return p;
 
          return buf_no;
        }
 
      if (l > c)
        l = c;
 
      /*
       * Insert any local processing here.
       */
 
      if (local_conversion[dev] == AFMT_MU_LAW)
        {
          /*
           * This just allows interrupts while the conversion is running
           */
          sti ();
 
          translate_bytes (dsp_ulaw, (unsigned char *) dmabuf, l);
        }
 
      memcpy_tofs (&(buf)[p], dmabuf, l);
 
      DMAbuf_rmchars (dev, buf_no, l);
 
      p += l;
      c -= l;
    }
 
  return count - c;
}
 
int
audio_ioctl (int dev, struct fileinfo *file,
             unsigned int cmd, caddr_t arg)
{
 
  dev = dev >> 4;
 
  if (((cmd >> 8) & 0xff) == 'C')
    {
      if (audio_devs[dev]->coproc)      /* Coprocessor ioctl */
        return audio_devs[dev]->coproc->ioctl (audio_devs[dev]->coproc->devc, cmd, arg, 0);
      else
        printk ("/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;
 
        sync_output (dev);
        return DMAbuf_ioctl (dev, cmd, arg, 0);
        break;
 
      case SNDCTL_DSP_POST:
        if (!(audio_devs[dev]->open_mode & OPEN_WRITE))
          return 0;
        sync_output (dev);
        return 0;
        break;
 
      case SNDCTL_DSP_RESET:
        audio_mode[dev] = AM_NONE;
        return DMAbuf_ioctl (dev, cmd, arg, 0);
        break;
 
      case SNDCTL_DSP_GETFMTS:
        return snd_ioctl_return ((int *) arg, audio_devs[dev]->format_mask | AFMT_MU_LAW);
        break;
 
      case SNDCTL_DSP_SETFMT:
        return snd_ioctl_return ((int *) arg, set_format (dev, get_user ((int *) arg)));
 
      case SNDCTL_DSP_GETISPACE:
        if (!(audio_devs[dev]->open_mode & OPEN_READ))
          return 0;
        if ((audio_mode[dev] & AM_WRITE) && !(audio_devs[dev]->flags & DMA_DUPLEX))
          return -(EBUSY);
 
        {
          audio_buf_info  info;
 
          int             err = DMAbuf_ioctl (dev, cmd, (caddr_t) & info, 1);
 
          if (err < 0)
            return err;
 
          memcpy_tofs (&((char *) arg)[0], (char *) &info, sizeof (info));
          return 0;
        }
 
      case SNDCTL_DSP_GETOSPACE:
        if (!(audio_devs[dev]->open_mode & OPEN_WRITE))
          return -EPERM;
        if ((audio_mode[dev] & AM_READ) && !(audio_devs[dev]->flags & DMA_DUPLEX))
          return -(EBUSY);
 
        {
          audio_buf_info  info;
          char           *dma_buf;
          int             buf_no, buf_ptr, buf_size;
 
          int             err = DMAbuf_ioctl (dev, cmd, (caddr_t) & info, 1);
 
          if (err < 0)
            return err;
 
          if (DMAbuf_get_curr_buffer (dev, &buf_no, &dma_buf, &buf_ptr, &buf_size) >= 0)
            info.bytes -= buf_ptr;
 
          memcpy_tofs (&((char *) arg)[0], (char *) &info, sizeof (info));
          return 0;
        }
 
      case SNDCTL_DSP_NONBLOCK:
        dev_nblock[dev] = 1;
        return 0;
        break;
 
      case SNDCTL_DSP_GETCAPS:
        {
          int             info = 1;     /* Revision level of this ioctl() */
 
          if (audio_devs[dev]->flags & DMA_DUPLEX)
            info |= DSP_CAP_DUPLEX;
 
          if (audio_devs[dev]->coproc)
            info |= DSP_CAP_COPROC;
 
          if (audio_devs[dev]->d->local_qlen)   /* Device has hidden buffers */
            info |= DSP_CAP_BATCH;
 
          if (audio_devs[dev]->d->trigger)      /* Supports SETTRIGGER */
            info |= DSP_CAP_TRIGGER;
 
          info |= DSP_CAP_MMAP;
 
          memcpy_tofs (&((char *) arg)[0], (char *) &info, sizeof (info));
          return 0;
        }
        break;
 
      default:
        return DMAbuf_ioctl (dev, cmd, arg, 0);
      }
}
 
void
audio_init (void)
{
  /*
     * NOTE! This routine could be called several times during boot.
   */
}
 
int
audio_select (int dev, struct fileinfo *file, int sel_type, select_table_handle * wait)
{
  char           *dma_buf;
  int             buf_no, buf_ptr, buf_size;
 
  dev = dev >> 4;
 
  switch (sel_type)
    {
    case SEL_IN:
      if (audio_mode[dev] & AM_WRITE && !(audio_devs[dev]->flags & DMA_DUPLEX))
        {
          return 0;              /* Not recording */
        }
 
      return DMAbuf_select (dev, file, sel_type, wait);
      break;
 
    case SEL_OUT:
      if (audio_mode[dev] & AM_READ && !(audio_devs[dev]->flags & DMA_DUPLEX))
        {
          return 0;              /* Wrong direction */
        }
 
      if (DMAbuf_get_curr_buffer (dev, &buf_no, &dma_buf, &buf_ptr, &buf_size) >= 0)
        {
          return 1;             /* There is space in the current buffer */
        }
 
      return DMAbuf_select (dev, file, sel_type, wait);
      break;
 
    case SEL_EX:
      return 0;
    }
 
  return 0;
}
 
 
#endif

Browse

Tools

Subversion Repositories or1k_old

[/] [or1k_old/] [trunk/] [uclinux/] [uClinux-2.0.x/] [drivers/] [sound/] [audio.c] - Blame information for rev 199

Line No.	Rev	Author	Line
1	199	simons	`/*`
2			`* sound/audio.c`
3			`*`
4			`* Device file manager for /dev/audio`
5			`*/`
6
7			`/*`
8			`* Copyright (C) by Hannu Savolainen 1993-1996`
9			`*`
10			`* USS/Lite for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)`
11			`* Version 2 (June 1991). See the "COPYING" file distributed with this software`
12			`* for more info.`
13			`*/`
14			`#include <linux/config.h>`
15
16
17			`#include "sound_config.h"`
18
19			`#ifdef CONFIG_AUDIO`
20
21			`#include "ulaw.h"`
22			`#include "coproc.h"`
23
24			`#define ON 1`
25			`#define OFF 0`
26
27			`static int audio_mode[MAX_AUDIO_DEV];`
28			`static int dev_nblock[MAX_AUDIO_DEV]; /* 1 if in nonblocking mode */`
29
30			`#define AM_NONE 0`
31			`#define AM_WRITE 1`
32			`#define AM_READ 2`
33
34			`static int audio_format[MAX_AUDIO_DEV];`
35			`static int local_conversion[MAX_AUDIO_DEV];`
36
37			`static int`
38			`set_format (int dev, long fmt)`
39			`{`
40			`if (fmt != AFMT_QUERY)`
41			`{`
42
43			`local_conversion[dev] = 0;`
44
45			`if (!(audio_devs[dev]->format_mask & fmt)) /* Not supported */`
46			`if (fmt == AFMT_MU_LAW)`
47			`{`
48			`fmt = AFMT_U8;`
49			`local_conversion[dev] = AFMT_MU_LAW;`
50			`}`
51			`else`
52			`fmt = AFMT_U8; /* This is always supported */`
53
54			`audio_format[dev] = DMAbuf_ioctl (dev, SNDCTL_DSP_SETFMT, (caddr_t) fmt, 1);`
55			`}`
56
57			`if (local_conversion[dev]) /* This shadows the HW format */`
58			`return local_conversion[dev];`
59
60			`return audio_format[dev];`
61			`}`
62
63			`int`
64			`audio_open (int dev, struct fileinfo *file)`
65			`{`
66			`int ret;`
67			`long bits;`
68			`int dev_type = dev & 0x0f;`
69			`int mode = file->mode & O_ACCMODE;`
70
71			`dev = dev >> 4;`
72
73			`if (dev_type == SND_DEV_DSP16)`
74			`bits = 16;`
75			`else`
76			`bits = 8;`
77
78			`if ((ret = DMAbuf_open (dev, mode)) < 0)`
79			`return ret;`
80
81			`if (audio_devs[dev]->coproc)`
82			`if ((ret = audio_devs[dev]->coproc->`
83			`open (audio_devs[dev]->coproc->devc, COPR_PCM)) < 0)`
84			`{`
85			`audio_release (dev, file);`
86			`printk ("Sound: Can't access coprocessor device\n");`
87
88			`return ret;`
89			`}`
90
91			`local_conversion[dev] = 0;`
92
93			`if (DMAbuf_ioctl (dev, SNDCTL_DSP_SETFMT, (caddr_t) bits, 1) != bits)`
94			`{`
95			`printk ("audio: Can't set number of bits on device %d\n", dev);`
96			`audio_release (dev, file);`
97			`return -(ENXIO);`
98			`}`
99
100			`if (dev_type == SND_DEV_AUDIO)`
101			`{`
102			`set_format (dev, AFMT_MU_LAW);`
103			`}`
104			`else`
105			`set_format (dev, bits);`
106
107			`audio_mode[dev] = AM_NONE;`
108			`dev_nblock[dev] = 0;`
109
110			`return ret;`
111			`}`
112
113			`void`
114			`sync_output (int dev)`
115			`{`
116			`int buf_no, buf_ptr, buf_size, p, i;`
117			`char *dma_buf;`
118			`struct dma_buffparms *dmap = audio_devs[dev]->dmap_out;`
119
120			`if (DMAbuf_get_curr_buffer (dev, &buf_no, &dma_buf, &buf_ptr, &buf_size) >= 0)`
121			`{`
122			`DMAbuf_start_output (dev, buf_no, buf_ptr);`
123			`}`
124
125			`/*`
126			`* Clean all unused buffer fragments.`
127			`*/`
128
129			`p = dmap->qtail;`
130
131			`for (i = dmap->qlen + 1; i < dmap->nbufs; i++)`
132			`{`
133			`memset (dmap->raw_buf + p * dmap->fragment_size,`
134			`dmap->neutral_byte,`
135			`dmap->fragment_size);`
136
137			`p = (p + 1) % dmap->nbufs;`
138			`}`
139
140			`dmap->flags \|= DMA_CLEAN;`
141			`}`
142
143			`void`
144			`audio_release (int dev, struct fileinfo *file)`
145			`{`
146			`int mode;`
147
148			`dev = dev >> 4;`
149			`mode = file->mode & O_ACCMODE;`
150
151			`audio_devs[dev]->dmap_out->closing = 1;`
152			`audio_devs[dev]->dmap_in->closing = 1;`
153
154			`sync_output (dev);`
155
156			`if (audio_devs[dev]->coproc)`
157			`audio_devs[dev]->coproc->close (audio_devs[dev]->coproc->devc, COPR_PCM);`
158			`DMAbuf_release (dev, mode);`
159			`}`
160
161			`#if defined(NO_INLINE_ASM) \|\| !defined(i386)`
162			`static void`
163			`translate_bytes (const unsigned char table, unsigned char buff, int n)`
164			`{`
165			`unsigned long i;`
166
167			`if (n <= 0)`
168			`return;`
169
170			`for (i = 0; i < n; ++i)`
171			`buff[i] = table[buff[i]];`
172			`}`
173
174			`#else`
175			`extern inline void`
176			`translate_bytes (const void table, void buff, int n)`
177			`{`
178			`if (n > 0)`
179			`{`
180			`__asm__ ("cld\n"`
181			`"1:\tlodsb\n\t"`
182			`"xlatb\n\t"`
183			`"stosb\n\t"`
184			`"loop 1b\n\t":`
185			`: "b" ((long) table), "c" (n), "D" ((long) buff), "S" ((long) buff)`
186			`: "bx", "cx", "di", "si", "ax");`
187			`}`
188			`}`
189
190			`#endif`
191
192			`int`
193			`audio_write (int dev, struct fileinfo file, const char buf, int count)`
194			`{`
195			`int c, p, l, buf_no, buf_ptr, buf_size;`
196			`int err;`
197			`char *dma_buf;`
198
199			`dev = dev >> 4;`
200
201			`p = 0;`
202			`c = count;`
203
204			`if (count < 0)`
205			`return -EINVAL;`
206
207			`if ((audio_mode[dev] & AM_READ) && !(audio_devs[dev]->flags & DMA_DUPLEX))`
208			`{ /* Direction change */`
209			`}`
210
211			`if (audio_devs[dev]->flags & DMA_DUPLEX)`
212			`audio_mode[dev] \|= AM_WRITE;`
213			`else`
214			`audio_mode[dev] = AM_WRITE;`
215
216			`if (!count) /* Flush output */`
217			`{`
218			`sync_output (dev);`
219			`return 0;`
220			`}`
221
222			`while (c)`
223			`{`
224			`if (DMAbuf_get_curr_buffer (dev, &buf_no, &dma_buf, &buf_ptr, &buf_size) < 0)`
225			`{`
226			`if ((buf_no = DMAbuf_getwrbuffer (dev, &dma_buf,`
227			`&buf_size,`
228			`dev_nblock[dev])) < 0)`
229			`{`
230			`/* Handle nonblocking mode */`
231			`if (dev_nblock[dev] && buf_no == -(EAGAIN))`
232			`return p; /* No more space. Return # of accepted bytes */`
233			`return buf_no;`
234			`}`
235			`buf_ptr = 0;`
236			`}`
237
238			`l = c;`
239			`if (l > (buf_size - buf_ptr))`
240			`l = (buf_size - buf_ptr);`
241
242			`if (!audio_devs[dev]->d->copy_from_user)`
243			`{ /*`
244			`* No device specific copy routine`
245			`*/`
246			`memcpy_fromfs (&dma_buf[buf_ptr], &(buf)[p], l);`
247			`}`
248			`else`
249			`audio_devs[dev]->d->copy_from_user (dev,`
250			`dma_buf, buf_ptr, buf, p, l);`
251
252			`if (local_conversion[dev] == AFMT_MU_LAW)`
253			`{`
254			`/*`
255			`* This just allows interrupts while the conversion is running`
256			`*/`
257			`sti ();`
258			`translate_bytes (ulaw_dsp, (unsigned char *) &dma_buf[buf_ptr], l);`
259			`}`
260
261			`c -= l;`
262			`p += l;`
263			`buf_ptr += l;`
264
265			`if (buf_ptr >= buf_size)`
266			`{`
267			`if ((err = DMAbuf_start_output (dev, buf_no, buf_ptr)) < 0)`
268			`{`
269			`return err;`
270			`}`
271
272			`}`
273			`else`
274			`DMAbuf_set_count (dev, buf_no, buf_ptr);`
275
276			`}`
277
278			`return count;`
279			`}`
280
281			`int`
282			`audio_read (int dev, struct fileinfo file, char buf, int count)`
283			`{`
284			`int c, p, l;`
285			`char *dmabuf;`
286			`int buf_no;`
287
288			`dev = dev >> 4;`
289			`p = 0;`
290			`c = count;`
291
292			`if ((audio_mode[dev] & AM_WRITE) && !(audio_devs[dev]->flags & DMA_DUPLEX))`
293			`{`
294			`sync_output (dev);`
295			`}`
296
297			`if (audio_devs[dev]->flags & DMA_DUPLEX)`
298			`audio_mode[dev] \|= AM_READ;`
299			`else`
300			`audio_mode[dev] = AM_READ;`
301
302			`while (c)`
303			`{`
304			`if ((buf_no = DMAbuf_getrdbuffer (dev, &dmabuf, &l,`
305			`dev_nblock[dev])) < 0)`
306			`{`
307			`/* Nonblocking mode handling. Return current # of bytes */`
308
309			`if (dev_nblock[dev] && buf_no == -(EAGAIN))`
310			`return p;`
311
312			`return buf_no;`
313			`}`
314
315			`if (l > c)`
316			`l = c;`
317
318			`/*`
319			`* Insert any local processing here.`
320			`*/`
321
322			`if (local_conversion[dev] == AFMT_MU_LAW)`
323			`{`
324			`/*`
325			`* This just allows interrupts while the conversion is running`
326			`*/`
327			`sti ();`
328
329			`translate_bytes (dsp_ulaw, (unsigned char *) dmabuf, l);`
330			`}`
331
332			`memcpy_tofs (&(buf)[p], dmabuf, l);`
333
334			`DMAbuf_rmchars (dev, buf_no, l);`
335
336			`p += l;`
337			`c -= l;`
338			`}`
339
340			`return count - c;`
341			`}`
342
343			`int`
344			`audio_ioctl (int dev, struct fileinfo *file,`
345			`unsigned int cmd, caddr_t arg)`
346			`{`
347
348			`dev = dev >> 4;`
349
350			`if (((cmd >> 8) & 0xff) == 'C')`
351			`{`
352			`if (audio_devs[dev]->coproc) /* Coprocessor ioctl */`
353			`return audio_devs[dev]->coproc->ioctl (audio_devs[dev]->coproc->devc, cmd, arg, 0);`
354			`else`
355			`printk ("/dev/dsp%d: No coprocessor for this device\n", dev);`
356
357			`return -(ENXIO);`
358			`}`
359			`else`
360			`switch (cmd)`
361			`{`
362			`case SNDCTL_DSP_SYNC:`
363			`if (!(audio_devs[dev]->open_mode & OPEN_WRITE))`
364			`return 0;`
365
366			`sync_output (dev);`
367			`return DMAbuf_ioctl (dev, cmd, arg, 0);`
368			`break;`
369
370			`case SNDCTL_DSP_POST:`
371			`if (!(audio_devs[dev]->open_mode & OPEN_WRITE))`
372			`return 0;`
373			`sync_output (dev);`
374			`return 0;`
375			`break;`
376
377			`case SNDCTL_DSP_RESET:`
378			`audio_mode[dev] = AM_NONE;`
379			`return DMAbuf_ioctl (dev, cmd, arg, 0);`
380			`break;`
381
382			`case SNDCTL_DSP_GETFMTS:`
383			`return snd_ioctl_return ((int *) arg, audio_devs[dev]->format_mask \| AFMT_MU_LAW);`
384			`break;`
385
386			`case SNDCTL_DSP_SETFMT:`
387			`return snd_ioctl_return ((int ) arg, set_format (dev, get_user ((int ) arg)));`
388
389			`case SNDCTL_DSP_GETISPACE:`
390			`if (!(audio_devs[dev]->open_mode & OPEN_READ))`
391			`return 0;`
392			`if ((audio_mode[dev] & AM_WRITE) && !(audio_devs[dev]->flags & DMA_DUPLEX))`
393			`return -(EBUSY);`
394
395			`{`
396			`audio_buf_info info;`
397
398			`int err = DMAbuf_ioctl (dev, cmd, (caddr_t) & info, 1);`
399
400			`if (err < 0)`
401			`return err;`
402
403			`memcpy_tofs (&((char ) arg)[0], (char ) &info, sizeof (info));`
404			`return 0;`
405			`}`
406
407			`case SNDCTL_DSP_GETOSPACE:`
408			`if (!(audio_devs[dev]->open_mode & OPEN_WRITE))`
409			`return -EPERM;`
410			`if ((audio_mode[dev] & AM_READ) && !(audio_devs[dev]->flags & DMA_DUPLEX))`
411			`return -(EBUSY);`
412
413			`{`
414			`audio_buf_info info;`
415			`char *dma_buf;`
416			`int buf_no, buf_ptr, buf_size;`
417
418			`int err = DMAbuf_ioctl (dev, cmd, (caddr_t) & info, 1);`
419
420			`if (err < 0)`
421			`return err;`
422
423			`if (DMAbuf_get_curr_buffer (dev, &buf_no, &dma_buf, &buf_ptr, &buf_size) >= 0)`
424			`info.bytes -= buf_ptr;`
425
426			`memcpy_tofs (&((char ) arg)[0], (char ) &info, sizeof (info));`
427			`return 0;`
428			`}`
429
430			`case SNDCTL_DSP_NONBLOCK:`
431			`dev_nblock[dev] = 1;`
432			`return 0;`
433			`break;`
434
435			`case SNDCTL_DSP_GETCAPS:`
436			`{`
437			`int info = 1; /* Revision level of this ioctl() */`
438
439			`if (audio_devs[dev]->flags & DMA_DUPLEX)`
440			`info \|= DSP_CAP_DUPLEX;`
441
442			`if (audio_devs[dev]->coproc)`
443			`info \|= DSP_CAP_COPROC;`
444
445			`if (audio_devs[dev]->d->local_qlen) /* Device has hidden buffers */`
446			`info \|= DSP_CAP_BATCH;`
447
448			`if (audio_devs[dev]->d->trigger) /* Supports SETTRIGGER */`
449			`info \|= DSP_CAP_TRIGGER;`
450
451			`info \|= DSP_CAP_MMAP;`
452
453			`memcpy_tofs (&((char ) arg)[0], (char ) &info, sizeof (info));`
454			`return 0;`
455			`}`
456			`break;`
457
458			`default:`
459			`return DMAbuf_ioctl (dev, cmd, arg, 0);`
460			`}`
461			`}`
462
463			`void`
464			`audio_init (void)`
465			`{`
466			`/*`
467			`* NOTE! This routine could be called several times during boot.`
468			`*/`
469			`}`
470
471			`int`
472			`audio_select (int dev, struct fileinfo file, int sel_type, select_table_handle wait)`
473			`{`
474			`char *dma_buf;`
475			`int buf_no, buf_ptr, buf_size;`
476
477			`dev = dev >> 4;`
478
479			`switch (sel_type)`
480			`{`
481			`case SEL_IN:`
482			`if (audio_mode[dev] & AM_WRITE && !(audio_devs[dev]->flags & DMA_DUPLEX))`
483			`{`
484			`return 0; /* Not recording */`
485			`}`
486
487			`return DMAbuf_select (dev, file, sel_type, wait);`
488			`break;`
489
490			`case SEL_OUT:`
491			`if (audio_mode[dev] & AM_READ && !(audio_devs[dev]->flags & DMA_DUPLEX))`
492			`{`
493			`return 0; /* Wrong direction */`
494			`}`
495
496			`if (DMAbuf_get_curr_buffer (dev, &buf_no, &dma_buf, &buf_ptr, &buf_size) >= 0)`
497			`{`
498			`return 1; /* There is space in the current buffer */`
499			`}`
500
501			`return DMAbuf_select (dev, file, sel_type, wait);`
502			`break;`
503
504			`case SEL_EX:`
505			`return 0;`
506			`}`
507
508			`return 0;`
509			`}`
510
511
512			`#endif`