freebsd-dev/sys/i386/isa/sound/pas2_pcm.c
Peter Wemm a0f70ac053 Part 2 of pcvt/voxware revival. I hope I have not clobbered any other
deltas, but it is possible since I had a few merge conflicts over the last
few days while this has been sitting ready to go.

(Part 1 was committed to the config files, but cvs aborted grrr..)

Approved by:    core
1999-01-01 08:18:13 +00:00

450 lines
10 KiB
C

#define _PAS2_PCM_C_
/*
* sound/pas2_pcm.c
*
* The low level driver for the Pro Audio Spectrum ADC/DAC.
*
* Copyright by Hannu Savolainen 1993
*
* 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 <i386/isa/sound/sound_config.h>
#if defined(CONFIG_PAS) && defined(CONFIG_AUDIO)
#include <i386/isa/sound/pas_hw.h>
#define TRACE(WHAT) /* * * (WHAT) */
#define PAS_PCM_INTRBITS (0x08)
/*
* Sample buffer timer interrupt enable
*/
#define PCM_NON 0
#define PCM_DAC 1
#define PCM_ADC 2
static u_long pcm_speed = 0; /* sampling rate */
static u_char pcm_channels = 1; /* channels (1 or 2) */
static u_char pcm_bits = 8; /* bits/sample (8 or 16) */
static u_char pcm_filter = 0; /* filter FLAG */
static u_char pcm_mode = PCM_NON;
static u_long pcm_count = 0;
static u_short pcm_bitsok = 8; /* mask of OK bits */
static int my_devnum = 0;
static int open_mode = 0;
static int
pcm_set_speed(int arg)
{
int foo, tmp;
u_long flags;
if (arg > 44100)
arg = 44100;
if (arg < 5000)
arg = 5000;
foo = (1193180 + (arg / 2)) / arg;
arg = 1193180 / foo;
if (pcm_channels & 2)
foo = foo >> 1;
pcm_speed = arg;
tmp = pas_read(FILTER_FREQUENCY);
/*
* Set anti-aliasing filters according to sample rate. You reall
* *NEED* to enable this feature for all normal recording unless you
* want to experiment with aliasing effects. These filters apply to
* the selected "recording" source. I (pfw) don't know the encoding
* of these 5 bits. The values shown come from the SDK found on
* ftp.uwp.edu:/pub/msdos/proaudio/.
*/
#if !defined NO_AUTO_FILTER_SET
tmp &= 0xe0;
if (pcm_speed >= 2 * 17897)
tmp |= 0x21;
else if (pcm_speed >= 2 * 15909)
tmp |= 0x22;
else if (pcm_speed >= 2 * 11931)
tmp |= 0x29;
else if (pcm_speed >= 2 * 8948)
tmp |= 0x31;
else if (pcm_speed >= 2 * 5965)
tmp |= 0x39;
else if (pcm_speed >= 2 * 2982)
tmp |= 0x24;
pcm_filter = tmp;
#endif
flags = splhigh();
pas_write(tmp & ~(F_F_PCM_RATE_COUNTER | F_F_PCM_BUFFER_COUNTER), FILTER_FREQUENCY);
pas_write(S_C_C_SAMPLE_RATE | S_C_C_LSB_THEN_MSB | S_C_C_SQUARE_WAVE, SAMPLE_COUNTER_CONTROL);
pas_write(foo & 0xff, SAMPLE_RATE_TIMER);
pas_write((foo >> 8) & 0xff, SAMPLE_RATE_TIMER);
pas_write(tmp, FILTER_FREQUENCY);
splx(flags);
return pcm_speed;
}
static int
pcm_set_channels(int arg)
{
if ((arg != 1) && (arg != 2))
return pcm_channels;
if (arg != pcm_channels) {
pas_write(pas_read(PCM_CONTROL) ^ P_C_PCM_MONO, PCM_CONTROL);
pcm_channels = arg;
pcm_set_speed(pcm_speed); /* The speed must be
* reinitialized */
}
return pcm_channels;
}
static int
pcm_set_bits(int arg)
{
if ((arg & pcm_bitsok) != arg)
return pcm_bits;
if (arg != pcm_bits) {
pas_write(pas_read(SYSTEM_CONFIGURATION_2) ^ S_C_2_PCM_16_BIT, SYSTEM_CONFIGURATION_2);
pcm_bits = arg;
}
return pcm_bits;
}
static int
pas_pcm_ioctl(int dev, u_int cmd, ioctl_arg arg, int local)
{
TRACE(printf("pas2_pcm.c: static int pas_pcm_ioctl(u_int cmd = %X, u_int arg = %X)\n", cmd, arg));
switch (cmd) {
case SOUND_PCM_WRITE_RATE:
if (local)
return pcm_set_speed((int) arg);
return *(int *) arg = pcm_set_speed((*(int *) arg));
break;
case SOUND_PCM_READ_RATE:
if (local)
return pcm_speed;
return *(int *) arg = pcm_speed;
break;
case SNDCTL_DSP_STEREO:
if (local)
return pcm_set_channels((int) arg + 1) - 1;
return *(int *) arg = pcm_set_channels((*(int *) arg) + 1) - 1;
break;
case SOUND_PCM_WRITE_CHANNELS:
if (local)
return pcm_set_channels((int) arg);
return *(int *) arg = pcm_set_channels((*(int *) arg));
break;
case SOUND_PCM_READ_CHANNELS:
if (local)
return pcm_channels;
return *(int *) arg = pcm_channels;
break;
case SNDCTL_DSP_SETFMT:
if (local)
return pcm_set_bits((int) arg);
return *(int *) arg = pcm_set_bits((*(int *) arg));
break;
case SOUND_PCM_READ_BITS:
if (local)
return pcm_bits;
return *(int *) arg = pcm_bits;
case SOUND_PCM_WRITE_FILTER: /* NOT YET IMPLEMENTED */
if ((*(int *) arg) > 1)
return -(EINVAL);
pcm_filter = (*(int *) arg);
break;
case SOUND_PCM_READ_FILTER:
return *(int *) arg = pcm_filter;
break;
default:
return -(EINVAL);
}
return -(EINVAL);
}
static void
pas_pcm_reset(int dev)
{
TRACE(printf("pas2_pcm.c: static void pas_pcm_reset(void)\n"));
pas_write(pas_read(PCM_CONTROL) & ~P_C_PCM_ENABLE, PCM_CONTROL);
}
static int
pas_pcm_open(int dev, int mode)
{
int err;
TRACE(printf("pas2_pcm.c: static int pas_pcm_open(int mode = %X)\n", mode));
if ((err = pas_set_intr(PAS_PCM_INTRBITS)) < 0)
return err;
pcm_count = 0;
open_mode = mode;
return 0;
}
static void
pas_pcm_close(int dev)
{
u_long flags;
TRACE(printf("pas2_pcm.c: static void pas_pcm_close(void)\n"));
flags = splhigh();
pas_pcm_reset(dev);
pas_remove_intr(PAS_PCM_INTRBITS);
pcm_mode = PCM_NON;
open_mode = 0;
splx(flags);
}
static void
pas_pcm_output_block(int dev, u_long buf, int count,
int intrflag, int restart_dma)
{
u_long flags, cnt;
TRACE(printf("pas2_pcm.c: static void pas_pcm_output_block(char *buf = %P, int count = %X)\n", buf, count));
cnt = count;
if (audio_devs[dev]->dmachan1 > 3)
cnt >>= 1;
if (audio_devs[dev]->flags & DMA_AUTOMODE &&
intrflag &&
cnt == pcm_count)
return; /* Auto mode on. No need to react */
flags = splhigh();
pas_write(pas_read(PCM_CONTROL) & ~P_C_PCM_ENABLE,
PCM_CONTROL);
if (restart_dma)
DMAbuf_start_dma(dev, buf, count, 1);
if (audio_devs[dev]->dmachan1 > 3)
count >>= 1;
if (count != pcm_count) {
pas_write(pas_read(FILTER_FREQUENCY) & ~F_F_PCM_BUFFER_COUNTER, FILTER_FREQUENCY);
pas_write(S_C_C_SAMPLE_BUFFER | S_C_C_LSB_THEN_MSB | S_C_C_SQUARE_WAVE, SAMPLE_COUNTER_CONTROL);
pas_write(count & 0xff, SAMPLE_BUFFER_COUNTER);
pas_write((count >> 8) & 0xff, SAMPLE_BUFFER_COUNTER);
pas_write(pas_read(FILTER_FREQUENCY) | F_F_PCM_BUFFER_COUNTER, FILTER_FREQUENCY);
pcm_count = count;
}
pas_write(pas_read(FILTER_FREQUENCY) | F_F_PCM_BUFFER_COUNTER | F_F_PCM_RATE_COUNTER, FILTER_FREQUENCY);
#ifdef NO_TRIGGER
pas_write(pas_read(PCM_CONTROL) | P_C_PCM_ENABLE | P_C_PCM_DAC_MODE, PCM_CONTROL);
#endif
pcm_mode = PCM_DAC;
splx(flags);
}
static void
pas_pcm_start_input(int dev, u_long buf, int count,
int intrflag, int restart_dma)
{
u_long flags;
int cnt;
TRACE(printf("pas2_pcm.c: static void pas_pcm_start_input(char *buf = %P, int count = %X)\n", buf, count));
cnt = count;
if (audio_devs[dev]->dmachan1 > 3)
cnt >>= 1;
if (audio_devs[my_devnum]->flags & DMA_AUTOMODE &&
intrflag &&
cnt == pcm_count)
return; /* Auto mode on. No need to react */
flags = splhigh();
if (restart_dma)
DMAbuf_start_dma(dev, buf, count, 0);
if (audio_devs[dev]->dmachan1 > 3)
count >>= 1;
if (count != pcm_count) {
pas_write(pas_read(FILTER_FREQUENCY) & ~F_F_PCM_BUFFER_COUNTER, FILTER_FREQUENCY);
pas_write(S_C_C_SAMPLE_BUFFER | S_C_C_LSB_THEN_MSB | S_C_C_SQUARE_WAVE, SAMPLE_COUNTER_CONTROL);
pas_write(count & 0xff, SAMPLE_BUFFER_COUNTER);
pas_write((count >> 8) & 0xff, SAMPLE_BUFFER_COUNTER);
pas_write(pas_read(FILTER_FREQUENCY) | F_F_PCM_BUFFER_COUNTER, FILTER_FREQUENCY);
pcm_count = count;
}
pas_write(pas_read(FILTER_FREQUENCY) | F_F_PCM_BUFFER_COUNTER | F_F_PCM_RATE_COUNTER, FILTER_FREQUENCY);
#ifdef NO_TRIGGER
pas_write((pas_read(PCM_CONTROL) | P_C_PCM_ENABLE) & ~P_C_PCM_DAC_MODE, PCM_CONTROL);
#endif
pcm_mode = PCM_ADC;
splx(flags);
}
#ifndef NO_TRIGGER
static void
pas_audio_trigger (int dev, int state)
{
unsigned long flags;
flags = splhigh();
state &= open_mode;
if (state & PCM_ENABLE_OUTPUT)
pas_write (pas_read (0xF8A) | 0x40 | 0x10, 0xF8A);
else if (state & PCM_ENABLE_INPUT)
pas_write ((pas_read (0xF8A) | 0x40) & ~0x10, 0xF8A);
else
pas_write (pas_read (0xF8A) & ~0x40, 0xF8A);
splx(flags);
}
#endif
static int
pas_pcm_prepare_for_input(int dev, int bsize, int bcount)
{
return 0;
}
static int
pas_pcm_prepare_for_output(int dev, int bsize, int bcount)
{
return 0;
}
static struct audio_operations pas_pcm_operations =
{
"Pro Audio Spectrum",
DMA_AUTOMODE,
AFMT_U8 | AFMT_S16_LE,
NULL,
pas_pcm_open,
pas_pcm_close,
pas_pcm_output_block,
pas_pcm_start_input,
pas_pcm_ioctl,
pas_pcm_prepare_for_input,
pas_pcm_prepare_for_output,
pas_pcm_reset,
pas_pcm_reset,
NULL,
NULL,
NULL,
NULL,
pas_audio_trigger
};
void
pas_pcm_init(struct address_info * hw_config)
{
pcm_bitsok = 8;
if (pas_read(OPERATION_MODE_1) & O_M_1_PCM_TYPE)
pcm_bitsok |= 16;
pcm_set_speed(DSP_DEFAULT_SPEED);
if (num_audiodevs < MAX_AUDIO_DEV) {
audio_devs[my_devnum = num_audiodevs++] = &pas_pcm_operations;
audio_devs[my_devnum]->dmachan1 = hw_config->dma;
audio_devs[my_devnum]->buffsize = DSP_BUFFSIZE;
} else
printf("PAS2: Too many PCM devices available\n");
return;
}
void
pas_pcm_interrupt(u_char status, int cause)
{
if (cause == 1) { /* PCM buffer done */
/*
* Halt the PCM first. Otherwise we don't have time to start
* a new block before the PCM chip proceeds to the next
* sample
*/
if (!(audio_devs[my_devnum]->flags & DMA_AUTOMODE)) {
pas_write(pas_read(PCM_CONTROL) & ~P_C_PCM_ENABLE,
PCM_CONTROL);
}
switch (pcm_mode) {
case PCM_DAC:
DMAbuf_outputintr(my_devnum, 1);
break;
case PCM_ADC:
DMAbuf_inputintr(my_devnum);
break;
default:
printf("PAS: Unexpected PCM interrupt\n");
}
}
}
#endif