351 lines
8.6 KiB
C
351 lines
8.6 KiB
C
/*
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* Driver for Sound Core PDAudioCF soundcards
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*
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* PCM part
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*
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* Copyright (c) 2003 by Jaroslav Kysela <perex@suse.cz>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <sound/driver.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/delay.h>
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#include <sound/core.h>
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#include <sound/asoundef.h>
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#include "pdaudiocf.h"
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/*
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* we use a vmalloc'ed (sg-)buffer
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*/
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/* get the physical page pointer on the given offset */
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static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs, unsigned long offset)
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{
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void *pageptr = subs->runtime->dma_area + offset;
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return vmalloc_to_page(pageptr);
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}
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/*
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* hw_params callback
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* NOTE: this may be called not only once per pcm open!
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*/
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static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t size)
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{
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struct snd_pcm_runtime *runtime = subs->runtime;
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if (runtime->dma_area) {
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if (runtime->dma_bytes >= size)
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return 0; /* already enough large */
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vfree(runtime->dma_area);
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}
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runtime->dma_area = vmalloc_32(size);
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if (! runtime->dma_area)
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return -ENOMEM;
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runtime->dma_bytes = size;
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return 0;
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}
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/*
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* hw_free callback
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* NOTE: this may be called not only once per pcm open!
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*/
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static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream *subs)
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{
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struct snd_pcm_runtime *runtime = subs->runtime;
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vfree(runtime->dma_area);
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runtime->dma_area = NULL;
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return 0;
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}
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/*
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* clear the SRAM contents
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*/
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static int pdacf_pcm_clear_sram(struct snd_pdacf *chip)
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{
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int max_loop = 64 * 1024;
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while (inw(chip->port + PDAUDIOCF_REG_RDP) != inw(chip->port + PDAUDIOCF_REG_WDP)) {
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if (max_loop-- < 0)
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return -EIO;
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inw(chip->port + PDAUDIOCF_REG_MD);
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}
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return 0;
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}
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/*
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* pdacf_pcm_trigger - trigger callback for capture
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*/
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static int pdacf_pcm_trigger(struct snd_pcm_substream *subs, int cmd)
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{
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struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
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struct snd_pcm_runtime *runtime = subs->runtime;
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int inc, ret = 0, rate;
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unsigned short mask, val, tmp;
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if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
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return -EBUSY;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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chip->pcm_hwptr = 0;
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chip->pcm_tdone = 0;
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/* fall thru */
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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case SNDRV_PCM_TRIGGER_RESUME:
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mask = 0;
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val = PDAUDIOCF_RECORD;
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inc = 1;
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rate = snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_STAT|AK4117_CHECK_NO_RATE);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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mask = PDAUDIOCF_RECORD;
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val = 0;
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inc = -1;
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rate = 0;
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break;
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default:
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return -EINVAL;
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}
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spin_lock(&chip->reg_lock);
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chip->pcm_running += inc;
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tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
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if (chip->pcm_running) {
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if ((chip->ak4117->rcs0 & AK4117_UNLCK) || runtime->rate != rate) {
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chip->pcm_running -= inc;
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ret = -EIO;
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goto __end;
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}
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}
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tmp &= ~mask;
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tmp |= val;
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pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, tmp);
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__end:
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spin_unlock(&chip->reg_lock);
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snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_RATE);
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return ret;
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}
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/*
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* pdacf_pcm_hw_params - hw_params callback for playback and capture
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*/
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static int pdacf_pcm_hw_params(struct snd_pcm_substream *subs,
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struct snd_pcm_hw_params *hw_params)
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{
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return snd_pcm_alloc_vmalloc_buffer(subs, params_buffer_bytes(hw_params));
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}
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/*
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* pdacf_pcm_hw_free - hw_free callback for playback and capture
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*/
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static int pdacf_pcm_hw_free(struct snd_pcm_substream *subs)
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{
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return snd_pcm_free_vmalloc_buffer(subs);
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}
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/*
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* pdacf_pcm_prepare - prepare callback for playback and capture
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*/
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static int pdacf_pcm_prepare(struct snd_pcm_substream *subs)
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{
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struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
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struct snd_pcm_runtime *runtime = subs->runtime;
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u16 val, nval, aval;
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if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
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return -EBUSY;
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chip->pcm_channels = runtime->channels;
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chip->pcm_little = snd_pcm_format_little_endian(runtime->format) > 0;
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#ifdef SNDRV_LITTLE_ENDIAN
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chip->pcm_swab = snd_pcm_format_big_endian(runtime->format) > 0;
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#else
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chip->pcm_swab = chip->pcm_little;
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#endif
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if (snd_pcm_format_unsigned(runtime->format))
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chip->pcm_xor = 0x80008000;
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if (pdacf_pcm_clear_sram(chip) < 0)
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return -EIO;
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val = nval = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
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nval &= ~(PDAUDIOCF_DATAFMT0|PDAUDIOCF_DATAFMT1);
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switch (runtime->format) {
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case SNDRV_PCM_FORMAT_S16_LE:
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case SNDRV_PCM_FORMAT_S16_BE:
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break;
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default: /* 24-bit */
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nval |= PDAUDIOCF_DATAFMT0 | PDAUDIOCF_DATAFMT1;
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break;
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}
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aval = 0;
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chip->pcm_sample = 4;
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switch (runtime->format) {
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case SNDRV_PCM_FORMAT_S16_LE:
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case SNDRV_PCM_FORMAT_S16_BE:
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aval = AK4117_DIF_16R;
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chip->pcm_frame = 2;
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chip->pcm_sample = 2;
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break;
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case SNDRV_PCM_FORMAT_S24_3LE:
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case SNDRV_PCM_FORMAT_S24_3BE:
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chip->pcm_sample = 3;
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/* fall through */
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default: /* 24-bit */
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aval = AK4117_DIF_24R;
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chip->pcm_frame = 3;
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chip->pcm_xor &= 0xffff0000;
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break;
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}
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if (val != nval) {
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snd_ak4117_reg_write(chip->ak4117, AK4117_REG_IO, AK4117_DIF2|AK4117_DIF1|AK4117_DIF0, aval);
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pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, nval);
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}
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val = pdacf_reg_read(chip, PDAUDIOCF_REG_IER);
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val &= ~(PDAUDIOCF_IRQLVLEN1);
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val |= PDAUDIOCF_IRQLVLEN0;
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pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val);
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chip->pcm_size = runtime->buffer_size;
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chip->pcm_period = runtime->period_size;
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chip->pcm_area = runtime->dma_area;
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return 0;
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}
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/*
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* capture hw information
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*/
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static struct snd_pcm_hardware pdacf_pcm_capture_hw = {
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.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
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SNDRV_PCM_INFO_MMAP_VALID),
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.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
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SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |
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SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
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.rates = SNDRV_PCM_RATE_32000 |
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SNDRV_PCM_RATE_44100 |
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SNDRV_PCM_RATE_48000 |
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SNDRV_PCM_RATE_88200 |
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SNDRV_PCM_RATE_96000 |
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SNDRV_PCM_RATE_176400 |
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SNDRV_PCM_RATE_192000,
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.rate_min = 32000,
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.rate_max = 192000,
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.channels_min = 1,
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.channels_max = 2,
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.buffer_bytes_max = (512*1024),
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.period_bytes_min = 8*1024,
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.period_bytes_max = (64*1024),
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.periods_min = 2,
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.periods_max = 128,
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.fifo_size = 0,
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};
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/*
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* pdacf_pcm_capture_open - open callback for capture
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*/
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static int pdacf_pcm_capture_open(struct snd_pcm_substream *subs)
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{
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struct snd_pcm_runtime *runtime = subs->runtime;
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struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
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if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
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return -EBUSY;
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runtime->hw = pdacf_pcm_capture_hw;
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runtime->private_data = chip;
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chip->pcm_substream = subs;
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return 0;
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}
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/*
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* pdacf_pcm_capture_close - close callback for capture
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*/
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static int pdacf_pcm_capture_close(struct snd_pcm_substream *subs)
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{
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struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
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if (!chip)
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return -EINVAL;
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pdacf_reinit(chip, 0);
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chip->pcm_substream = NULL;
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return 0;
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}
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/*
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* pdacf_pcm_capture_pointer - pointer callback for capture
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*/
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static snd_pcm_uframes_t pdacf_pcm_capture_pointer(struct snd_pcm_substream *subs)
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{
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struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
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return chip->pcm_hwptr;
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}
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/*
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* operators for PCM capture
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*/
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static struct snd_pcm_ops pdacf_pcm_capture_ops = {
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.open = pdacf_pcm_capture_open,
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.close = pdacf_pcm_capture_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = pdacf_pcm_hw_params,
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.hw_free = pdacf_pcm_hw_free,
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.prepare = pdacf_pcm_prepare,
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.trigger = pdacf_pcm_trigger,
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.pointer = pdacf_pcm_capture_pointer,
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.page = snd_pcm_get_vmalloc_page,
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};
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/*
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* snd_pdacf_pcm_new - create and initialize a pcm
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*/
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int snd_pdacf_pcm_new(struct snd_pdacf *chip)
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{
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struct snd_pcm *pcm;
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int err;
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err = snd_pcm_new(chip->card, "PDAudioCF", 0, 0, 1, &pcm);
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if (err < 0)
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return err;
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pdacf_pcm_capture_ops);
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pcm->private_data = chip;
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pcm->info_flags = 0;
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strcpy(pcm->name, chip->card->shortname);
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chip->pcm = pcm;
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err = snd_ak4117_build(chip->ak4117, pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);
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if (err < 0)
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return err;
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return 0;
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}
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