patch-2.0.1 linux/drivers/sound/sb16_dsp.c
Next file: linux/drivers/sound/sb16_midi.c
Previous file: linux/drivers/sound/sb.h
Back to the patch index
Back to the overall index
- 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
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov