diff options
Diffstat (limited to 'sys/i386/isa/sound/pas2_pcm.c')
| -rw-r--r-- | sys/i386/isa/sound/pas2_pcm.c | 449 |
1 files changed, 0 insertions, 449 deletions
diff --git a/sys/i386/isa/sound/pas2_pcm.c b/sys/i386/isa/sound/pas2_pcm.c deleted file mode 100644 index f2fc95c..0000000 --- a/sys/i386/isa/sound/pas2_pcm.c +++ /dev/null @@ -1,449 +0,0 @@ -#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 |
