- 根目录:
- sound
- pcmcia
- pdaudiocf
- pdaudiocf_pcm.c
/*
* Driver for Sound Core PDAudioCF soundcards
*
* PCM part
*
* Copyright (c) 2003 by Jaroslav Kysela <perex@perex.cz>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/delay.h>
#include <sound/core.h>
#include <sound/asoundef.h>
#include "pdaudiocf.h"
/*
* clear the SRAM contents
*/
static int pdacf_pcm_clear_sram(struct snd_pdacf *chip)
{
int max_loop = 64 * 1024;
while (inw(chip->port + PDAUDIOCF_REG_RDP) != inw(chip->port + PDAUDIOCF_REG_WDP)) {
if (max_loop-- < 0)
return -EIO;
inw(chip->port + PDAUDIOCF_REG_MD);
}
return 0;
}
/*
* pdacf_pcm_trigger - trigger callback for capture
*/
static int pdacf_pcm_trigger(struct snd_pcm_substream *subs, int cmd)
{
struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
struct snd_pcm_runtime *runtime = subs->runtime;
int inc, ret = 0, rate;
unsigned short mask, val, tmp;
if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
return -EBUSY;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
chip->pcm_hwptr = 0;
chip->pcm_tdone = 0;
/* fall thru */
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
case SNDRV_PCM_TRIGGER_RESUME:
mask = 0;
val = PDAUDIOCF_RECORD;
inc = 1;
rate = snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_STAT|AK4117_CHECK_NO_RATE);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_SUSPEND:
mask = PDAUDIOCF_RECORD;
val = 0;
inc = -1;
rate = 0;
break;
default:
return -EINVAL;
}
mutex_lock(&chip->reg_lock);
chip->pcm_running += inc;
tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
if (chip->pcm_running) {
if ((chip->ak4117->rcs0 & AK4117_UNLCK) || runtime->rate != rate) {
chip->pcm_running -= inc;
ret = -EIO;
goto __end;
}
}
tmp &= ~mask;
tmp |= val;
pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, tmp);
__end:
mutex_unlock(&chip->reg_lock);
snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_RATE);
return ret;
}
/*
* pdacf_pcm_hw_params - hw_params callback for playback and capture
*/
static int pdacf_pcm_hw_params(struct snd_pcm_substream *subs,
struct snd_pcm_hw_params *hw_params)
{
return snd_pcm_lib_alloc_vmalloc_32_buffer
(subs, params_buffer_bytes(hw_params));
}
/*
* pdacf_pcm_hw_free - hw_free callback for playback and capture
*/
static int pdacf_pcm_hw_free(struct snd_pcm_substream *subs)
{
return snd_pcm_lib_free_vmalloc_buffer(subs);
}
/*
* pdacf_pcm_prepare - prepare callback for playback and capture
*/
static int pdacf_pcm_prepare(struct snd_pcm_substream *subs)
{
struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
struct snd_pcm_runtime *runtime = subs->runtime;
u16 val, nval, aval;
if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
return -EBUSY;
chip->pcm_channels = runtime->channels;
chip->pcm_little = snd_pcm_format_little_endian(runtime->format) > 0;
#ifdef SNDRV_LITTLE_ENDIAN
chip->pcm_swab = snd_pcm_format_big_endian(runtime->format) > 0;
#else
chip->pcm_swab = chip->pcm_little;
#endif
if (snd_pcm_format_unsigned(runtime->format))
chip->pcm_xor = 0x80008000;
if (pdacf_pcm_clear_sram(chip) < 0)
return -EIO;
val = nval = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
nval &= ~(PDAUDIOCF_DATAFMT0|PDAUDIOCF_DATAFMT1);
switch (runtime->format) {
case SNDRV_PCM_FORMAT_S16_LE:
case SNDRV_PCM_FORMAT_S16_BE:
break;
default: /* 24-bit */
nval |= PDAUDIOCF_DATAFMT0 | PDAUDIOCF_DATAFMT1;
break;
}
aval = 0;
chip->pcm_sample = 4;
switch (runtime->format) {
case SNDRV_PCM_FORMAT_S16_LE:
case SNDRV_PCM_FORMAT_S16_BE:
aval = AK4117_DIF_16R;
chip->pcm_frame = 2;
chip->pcm_sample = 2;
break;
case SNDRV_PCM_FORMAT_S24_3LE:
case SNDRV_PCM_FORMAT_S24_3BE:
chip->pcm_sample = 3;
/* fall through */
default: /* 24-bit */
aval = AK4117_DIF_24R;
chip->pcm_frame = 3;
chip->pcm_xor &= 0xffff0000;
break;
}
if (val != nval) {
snd_ak4117_reg_write(chip->ak4117, AK4117_REG_IO, AK4117_DIF2|AK4117_DIF1|AK4117_DIF0, aval);
pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, nval);
}
val = pdacf_reg_read(chip, PDAUDIOCF_REG_IER);
val &= ~(PDAUDIOCF_IRQLVLEN1);
val |= PDAUDIOCF_IRQLVLEN0;
pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val);
chip->pcm_size = runtime->buffer_size;
chip->pcm_period = runtime->period_size;
chip->pcm_area = runtime->dma_area;
return 0;
}
/*
* capture hw information
*/
static struct snd_pcm_hardware pdacf_pcm_capture_hw = {
.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_BATCH),
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |
SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
.rates = SNDRV_PCM_RATE_32000 |
SNDRV_PCM_RATE_44100 |
SNDRV_PCM_RATE_48000 |
SNDRV_PCM_RATE_88200 |
SNDRV_PCM_RATE_96000 |
SNDRV_PCM_RATE_176400 |
SNDRV_PCM_RATE_192000,
.rate_min = 32000,
.rate_max = 192000,
.channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = (512*1024),
.period_bytes_min = 8*1024,
.period_bytes_max = (64*1024),
.periods_min = 2,
.periods_max = 128,
.fifo_size = 0,
};
/*
* pdacf_pcm_capture_open - open callback for capture
*/
static int pdacf_pcm_capture_open(struct snd_pcm_substream *subs)
{
struct snd_pcm_runtime *runtime = subs->runtime;
struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
return -EBUSY;
runtime->hw = pdacf_pcm_capture_hw;
runtime->private_data = chip;
chip->pcm_substream = subs;
return 0;
}
/*
* pdacf_pcm_capture_close - close callback for capture
*/
static int pdacf_pcm_capture_close(struct snd_pcm_substream *subs)
{
struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
if (!chip)
return -EINVAL;
pdacf_reinit(chip, 0);
chip->pcm_substream = NULL;
return 0;
}
/*
* pdacf_pcm_capture_pointer - pointer callback for capture
*/
static snd_pcm_uframes_t pdacf_pcm_capture_pointer(struct snd_pcm_substream *subs)
{
struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
return chip->pcm_hwptr;
}
/*
* operators for PCM capture
*/
static struct snd_pcm_ops pdacf_pcm_capture_ops = {
.open = pdacf_pcm_capture_open,
.close = pdacf_pcm_capture_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = pdacf_pcm_hw_params,
.hw_free = pdacf_pcm_hw_free,
.prepare = pdacf_pcm_prepare,
.trigger = pdacf_pcm_trigger,
.pointer = pdacf_pcm_capture_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
.mmap = snd_pcm_lib_mmap_vmalloc,
};
/*
* snd_pdacf_pcm_new - create and initialize a pcm
*/
int snd_pdacf_pcm_new(struct snd_pdacf *chip)
{
struct snd_pcm *pcm;
int err;
err = snd_pcm_new(chip->card, "PDAudioCF", 0, 0, 1, &pcm);
if (err < 0)
return err;
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pdacf_pcm_capture_ops);
pcm->private_data = chip;
pcm->info_flags = 0;
pcm->nonatomic = true;
strcpy(pcm->name, chip->card->shortname);
chip->pcm = pcm;
err = snd_ak4117_build(chip->ak4117, pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);
if (err < 0)
return err;
return 0;
}