patch-2.0.1 linux/drivers/sound/sb16_dsp.c

• Lines: 644
• Date: Thu Jan 1 02:00:00 1970
• Orig file: v2.0.0/linux/drivers/sound/sb16_dsp.c
• Orig date: Mon Mar 25 09:25:26 1996

diff -u --recursive --new-file v2.0.0/linux/drivers/sound/sb16_dsp.c linux/drivers/sound/sb16_dsp.c
@@ -1,643 +0,0 @@
-/*
- * sound/sb16_dsp.c
- *
- * The low level driver for the SoundBlaster DSP chip.
- */
-/*
- * Copyright by Hannu Savolainen 1993-1996
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met: 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer. 2.
- * Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
- * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-#include <linux/config.h>
-
-
-#define DEB(x)
-#define DEB1(x)
-/*
- * #define DEB_DMARES
- */
-#include "sound_config.h"
-#include "sb.h"
-#include "sb_mixer.h"
-
-#if defined(CONFIG_SB) && defined(CONFIG_AUDIO)
-
-extern int      sbc_base;
-extern int     *sb_osp;
-
-static int      sb16_dsp_ok = 0;
-static int      dsp_16bit = 0;
-static int      dsp_stereo = 0;
-static int      dsp_current_speed = 8000;
-static int      dsp_busy = 0;
-static int      dma16 = -1, dma8 = -1;
-static int      trigger_bits = 0;
-static unsigned long dsp_count = 0;
-
-static int      irq_mode = IMODE_NONE;
-static int      my_dev = 0;
-
-static volatile int intr_active = 0;
-
-static int      sb16_dsp_open (int dev, int mode);
-static void     sb16_dsp_close (int dev);
-static void     sb16_dsp_output_block (int dev, unsigned long buf, int count, int intrflag, int dma_restart);
-static void     sb16_dsp_start_input (int dev, unsigned long buf, int count, int intrflag, int dma_restart);
-static int      sb16_dsp_ioctl (int dev, unsigned int cmd, caddr_t arg, int local);
-static int      sb16_dsp_prepare_for_input (int dev, int bsize, int bcount);
-static int      sb16_dsp_prepare_for_output (int dev, int bsize, int bcount);
-static void     sb16_dsp_reset (int dev);
-static void     sb16_dsp_halt (int dev);
-static void     sb16_dsp_trigger (int dev, int bits);
-static int      dsp_set_speed (int);
-static int      dsp_set_stereo (int);
-static void     dsp_cleanup (void);
-int             sb_reset_dsp (void);
-
-static struct audio_operations sb16_dsp_operations =
-{
-  "SoundBlaster 16",
-  DMA_AUTOMODE,
-  AFMT_U8 | AFMT_S16_LE,
-  NULL,
-  sb16_dsp_open,
-  sb16_dsp_close,
-  sb16_dsp_output_block,
-  sb16_dsp_start_input,
-  sb16_dsp_ioctl,
-  sb16_dsp_prepare_for_input,
-  sb16_dsp_prepare_for_output,
-  sb16_dsp_reset,
-  sb16_dsp_halt,
-  NULL,
-  NULL,
-  NULL,
-  NULL,
-  sb16_dsp_trigger
-};
-
-static int
-sb_dsp_command01 (unsigned char val)
-{
-  int             i = 1 << 16;
-
-  while (--i & (!inb (DSP_STATUS) & 0x80));
-  if (!i)
-    printk ("SB16 sb_dsp_command01 Timeout\n");
-  return sb_dsp_command (val);
-}
-
-static int
-dsp_set_speed (int mode)
-{
-  DEB (printk ("dsp_set_speed(%d)\n", mode));
-  if (mode)
-    {
-      if (mode < 5000)
-	mode = 5000;
-      if (mode > 44100)
-	mode = 44100;
-      dsp_current_speed = mode;
-    }
-  return mode;
-}
-
-static int
-dsp_set_stereo (int mode)
-{
-  DEB (printk ("dsp_set_stereo(%d)\n", mode));
-
-  dsp_stereo = mode;
-
-  return mode;
-}
-
-static int
-dsp_set_bits (int arg)
-{
-  DEB (printk ("dsp_set_bits(%d)\n", arg));
-
-  if (arg)
-    switch (arg)
-      {
-      case 8:
-	dsp_16bit = 0;
-	break;
-      case 16:
-	dsp_16bit = 1;
-	break;
-      default:
-	dsp_16bit = 0;
-      }
-  return dsp_16bit ? 16 : 8;
-}
-
-static int
-sb16_dsp_ioctl (int dev, unsigned int cmd, caddr_t arg, int local)
-{
-  switch (cmd)
-    {
-    case SOUND_PCM_WRITE_RATE:
-      if (local)
-	return dsp_set_speed ((long) arg);
-      return snd_ioctl_return ((int *) arg, dsp_set_speed (get_fs_long ((long *) arg)));
-
-    case SOUND_PCM_READ_RATE:
-      if (local)
-	return dsp_current_speed;
-      return snd_ioctl_return ((int *) arg, dsp_current_speed);
-
-    case SNDCTL_DSP_STEREO:
-      if (local)
-	return dsp_set_stereo ((long) arg);
-      return snd_ioctl_return ((int *) arg, dsp_set_stereo (get_fs_long ((long *) arg)));
-
-    case SOUND_PCM_WRITE_CHANNELS:
-      if (local)
-	return dsp_set_stereo ((long) arg - 1) + 1;
-      return snd_ioctl_return ((int *) arg, dsp_set_stereo (get_fs_long ((long *) arg) - 1) + 1);
-
-    case SOUND_PCM_READ_CHANNELS:
-      if (local)
-	return dsp_stereo + 1;
-      return snd_ioctl_return ((int *) arg, dsp_stereo + 1);
-
-    case SNDCTL_DSP_SETFMT:
-      if (local)
-	return dsp_set_bits ((long) arg);
-      return snd_ioctl_return ((int *) arg, dsp_set_bits (get_fs_long ((long *) arg)));
-
-    case SOUND_PCM_READ_BITS:
-      if (local)
-	return dsp_16bit ? 16 : 8;
-      return snd_ioctl_return ((int *) arg, dsp_16bit ? 16 : 8);
-
-    case SOUND_PCM_WRITE_FILTER:	/*
-					 * NOT YET IMPLEMENTED
-					 */
-      if (get_fs_long ((long *) arg) > 1)
-	return snd_ioctl_return ((int *) arg, -EINVAL);
-    default:
-      return -EINVAL;
-    }
-
-  return -EINVAL;
-}
-
-static int
-sb16_dsp_open (int dev, int mode)
-{
-  int             retval;
-
-  DEB (printk ("sb16_dsp_open()\n"));
-  if (!sb16_dsp_ok)
-    {
-      printk ("SB16 Error: SoundBlaster board not installed\n");
-      return -ENXIO;
-    }
-
-  if (intr_active)
-    return -EBUSY;
-
-  retval = sb_get_irq ();
-  if (retval < 0)
-    return retval;
-
-  sb_reset_dsp ();
-
-  if (dma16 != dma8)
-    if (sound_open_dma (dma16, "SB16 (16bit)"))
-      {
-	printk ("SB16: Unable to grab DMA%d\n", dma16);
-	sb_free_irq ();
-	return -EBUSY;
-      }
-
-  irq_mode = IMODE_NONE;
-  dsp_busy = 1;
-  trigger_bits = 0;
-
-  return 0;
-}
-
-static void
-sb16_dsp_close (int dev)
-{
-  unsigned long   flags;
-
-  DEB (printk ("sb16_dsp_close()\n"));
-  sb_dsp_command01 (0xd9);
-  sb_dsp_command01 (0xd5);
-  sb_reset_dsp ();
-
-  save_flags (flags);
-  cli ();
-
-  audio_devs[dev]->dmachan1 = audio_devs[dev]->dmachan2 = dma8;
-
-  if (dma16 != dma8)
-    sound_close_dma (dma16);
-  sb_free_irq ();
-  dsp_cleanup ();
-  dsp_busy = 0;
-  restore_flags (flags);
-}
-
-static unsigned long trg_buf;
-static int      trg_bytes;
-static int      trg_intrflag;
-static int      trg_restart;
-
-static void
-sb16_dsp_output_block (int dev, unsigned long buf, int count, int intrflag, int dma_restart)
-{
-  trg_buf = buf;
-  trg_bytes = count;
-  trg_intrflag = intrflag;
-  trg_restart = dma_restart;
-  irq_mode = IMODE_OUTPUT;
-}
-
-static void
-actually_output_block (int dev, unsigned long buf, int count, int intrflag, int dma_restart)
-{
-  unsigned long   flags, cnt;
-
-  cnt = count;
-  if (dsp_16bit)
-    cnt >>= 1;
-  cnt--;
-
-  if (audio_devs[dev]->flags & DMA_AUTOMODE &&
-      intrflag &&
-      cnt == dsp_count)
-    {
-      irq_mode = IMODE_OUTPUT;
-      intr_active = 1;
-      return;			/*
-				 * Auto mode on. No need to react
-				 */
-    }
-  save_flags (flags);
-  cli ();
-
-  if (dma_restart)
-    {
-      sb16_dsp_halt (dev);
-      DMAbuf_start_dma (dev, buf, count, DMA_MODE_WRITE);
-    }
-  sb_dsp_command (0x41);
-  sb_dsp_command ((unsigned char) ((dsp_current_speed >> 8) & 0xff));
-  sb_dsp_command ((unsigned char) (dsp_current_speed & 0xff));
-  sb_dsp_command ((unsigned char) (dsp_16bit ? 0xb6 : 0xc6));
-  dsp_count = cnt;
-  sb_dsp_command ((unsigned char) ((dsp_stereo ? 0x20 : 0) +
-				   (dsp_16bit ? 0x10 : 0)));
-  sb_dsp_command01 ((unsigned char) (cnt & 0xff));
-  sb_dsp_command ((unsigned char) (cnt >> 8));
-
-  irq_mode = IMODE_OUTPUT;
-  intr_active = 1;
-  restore_flags (flags);
-}
-
-static void
-sb16_dsp_start_input (int dev, unsigned long buf, int count, int intrflag, int dma_restart)
-{
-  trg_buf = buf;
-  trg_bytes = count;
-  trg_intrflag = intrflag;
-  trg_restart = dma_restart;
-  irq_mode = IMODE_INPUT;
-}
-
-static void
-actually_start_input (int dev, unsigned long buf, int count, int intrflag, int dma_restart)
-{
-  unsigned long   flags, cnt;
-
-  cnt = count;
-  if (dsp_16bit)
-    cnt >>= 1;
-  cnt--;
-
-  if (audio_devs[dev]->flags & DMA_AUTOMODE &&
-      intrflag &&
-      cnt == dsp_count)
-    {
-      irq_mode = IMODE_INPUT;
-      intr_active = 1;
-      return;			/*
-				 * Auto mode on. No need to react
-				 */
-    }
-  save_flags (flags);
-  cli ();
-
-  if (dma_restart)
-    {
-      sb16_dsp_halt (dev);
-      DMAbuf_start_dma (dev, buf, count, DMA_MODE_READ);
-    }
-
-  sb_dsp_command (0x42);
-  sb_dsp_command ((unsigned char) ((dsp_current_speed >> 8) & 0xff));
-  sb_dsp_command ((unsigned char) (dsp_current_speed & 0xff));
-
-  sb_dsp_command ((unsigned char) (dsp_16bit ? 0xbe : 0xce));
-  dsp_count = cnt;
-  sb_dsp_command ((unsigned char) ((dsp_stereo ? 0x20 : 0) +
-				   (dsp_16bit ? 0x10 : 0)));
-  sb_dsp_command01 ((unsigned char) (cnt & 0xff));
-  sb_dsp_command ((unsigned char) (cnt >> 8));
-
-  irq_mode = IMODE_INPUT;
-  intr_active = 1;
-  restore_flags (flags);
-}
-
-static int
-sb16_dsp_prepare_for_input (int dev, int bsize, int bcount)
-{
-  audio_devs[my_dev]->dmachan1 =
-    audio_devs[my_dev]->dmachan2 =
-    dsp_16bit ? dma16 : dma8;
-  dsp_count = 0;
-  dsp_cleanup ();
-  trigger_bits = 0;
-  return 0;
-}
-
-static int
-sb16_dsp_prepare_for_output (int dev, int bsize, int bcount)
-{
-  audio_devs[my_dev]->dmachan1 =
-    audio_devs[my_dev]->dmachan2 =
-    dsp_16bit ? dma16 : dma8;
-  dsp_count = 0;
-  dsp_cleanup ();
-  trigger_bits = 0;
-  return 0;
-}
-
-static void
-sb16_dsp_trigger (int dev, int bits)
-{
-  trigger_bits = bits;
-
-  if (!bits)
-    {
-      sb_dsp_command (0xd0);	/* Halt DMA */
-    }
-  else if (bits & irq_mode)
-    switch (irq_mode)
-      {
-      case IMODE_INPUT:
-	actually_start_input (my_dev, trg_buf, trg_bytes,
-			      trg_intrflag, trg_restart);
-
-	break;
-
-      case IMODE_OUTPUT:
-	actually_output_block (my_dev, trg_buf, trg_bytes,
-			       trg_intrflag, trg_restart);
-	break;
-
-      }
-}
-
-static void
-dsp_cleanup (void)
-{
-  irq_mode = IMODE_NONE;
-  intr_active = 0;
-}
-
-static void
-sb16_dsp_reset (int dev)
-{
-  unsigned long   flags;
-
-  save_flags (flags);
-  cli ();
-
-  sb_reset_dsp ();
-  dsp_cleanup ();
-
-  restore_flags (flags);
-}
-
-static void
-sb16_dsp_halt (int dev)
-{
-  if (dsp_16bit)
-    {
-      sb_dsp_command01 (0xd9);
-      sb_dsp_command01 (0xd5);
-    }
-  else
-    {
-      sb_dsp_command01 (0xda);
-      sb_dsp_command01 (0xd0);
-    }
-  /* DMAbuf_reset_dma (dev); */
-}
-
-static void
-set_irq_hw (int level)
-{
-  int             ival;
-
-  switch (level)
-    {
-    case 5:
-      ival = 2;
-      break;
-    case 7:
-      ival = 4;
-      break;
-    case 9:
-      ival = 1;
-      break;
-    case 10:
-      ival = 8;
-      break;
-    default:
-      printk ("SB16_IRQ_LEVEL %d does not exist\n", level);
-      return;
-    }
-  sb_setmixer (IRQ_NR, ival);
-}
-
-long
-sb16_dsp_init (long mem_start, struct address_info *hw_config)
-{
-  extern int      sbc_major, sbc_minor;
-
-  if (sbc_major < 4)
-    return mem_start;		/* Not a SB16 */
-
-  sprintf (sb16_dsp_operations.name, "SoundBlaster 16 %d.%d", sbc_major, sbc_minor);
-
-  conf_printf (sb16_dsp_operations.name, hw_config);
-
-  if (num_audiodevs < MAX_AUDIO_DEV)
-    {
-      audio_devs[my_dev = num_audiodevs++] = &sb16_dsp_operations;
-      audio_devs[my_dev]->dmachan1 = audio_devs[my_dev]->dmachan2 = dma8;
-      audio_devs[my_dev]->buffsize = DSP_BUFFSIZE;
-
-      if (sound_alloc_dma (dma8, "SB16 (8bit)"))
-	{
-	  printk ("SB16: Unable to grab DMA%d\n", dma8);
-	}
-
-      if (dma16 != dma8)
-	if (sound_alloc_dma (dma16, "SB16 (16bit)"))
-	  {
-	    printk ("SB16: Unable to grab DMA%d\n", dma16);
-	  }
-    }
-  else
-    printk ("SB: Too many DSP devices available\n");
-  sb16_dsp_ok = 1;
-  return mem_start;
-}
-
-static void
-set_dma (int dma)
-{
-  if (dma >= 0 && dma < 4)
-    dma8 = dma;
-  if (dma >= 5 && dma <= 7)
-    dma16 = dma;
-}
-
-int
-sb16_dsp_detect (struct address_info *hw_config)
-{
-  struct address_info *sb_config;
-  extern int      sbc_major, Jazz16_detected;
-
-  extern void     Jazz16_set_dma16 (int dma);
-  int             irq;
-
-  if (sb16_dsp_ok)
-    {
-      return 1;			/* Can't drive two cards */
-    }
-
-  irq = hw_config->irq;
-  set_dma (hw_config->dma);
-  set_dma (hw_config->dma2);
-
-  if (Jazz16_detected)
-    {
-      Jazz16_set_dma16 (dma16);
-      sb16_dsp_ok = 1;
-      return 1;
-    }
-
-  if (dma8 == -1)
-    if (!(sb_config = sound_getconf (SNDCARD_SB)))
-      {
-	printk ("SB16 Error: Plain SB not configured\n");
-	return 0;
-      }
-    else
-      {
-	dma8 = sb_config->dma;
-	irq = sb_config->irq;
-      }
-
-  if (dma16 == -1)
-    dma16 = dma8;
-
-  /*
-   * sb_setmixer(OPSW,0xf); if(sb_getmixer(OPSW)!=0xf) return 0;
-   */
-
-  if (!sb_reset_dsp ())
-    return 0;
-
-  if (sbc_major < 4)		/* Set by the plain SB driver */
-    return 0;			/* Not a SB16 */
-
-  if (dma16 < 4)
-    if (dma16 != dma8)
-      {
-	printk ("SB16 Error: Invalid DMA channel %d/%d\n",
-		dma8, dma16);
-	return 0;
-      }
-
-  set_irq_hw (irq);
-  sb_setmixer (DMA_NR, (1 << dma16) | (1 << dma8));
-
-  DEB (printk ("SoundBlaster 16: IRQ %d DMA %d OK\n", sb_config->irq, dma16));
-
-  /*
-     * dsp_showmessage(0xe3,99);
-   */
-  sb16_dsp_ok = 1;
-  return 1;
-}
-
-void
-unload_sb16 (struct address_info *hw_config)
-{
-  extern int      Jazz16_detected;
-
-  if (Jazz16_detected)
-    return;
-
-  sound_free_dma (dma8);
-
-  if (dma16 != dma8)
-    sound_free_dma (dma16);
-}
-
-void
-sb16_dsp_interrupt (int unused)
-{
-  int             data;
-
-  data = inb (DSP_DATA_AVL16);	/*
-				   * Interrupt acknowledge
-				 */
-
-  if (intr_active)
-    switch (irq_mode)
-      {
-      case IMODE_OUTPUT:
-	DMAbuf_outputintr (my_dev, 1);
-	break;
-
-      case IMODE_INPUT:
-	DMAbuf_inputintr (my_dev);
-	break;
-
-      default:
-	printk ("SoundBlaster: Unexpected interrupt\n");
-      }
-}
-
-#endif