[net-next-2.6.git] / 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;
	}
	spin_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:
	spin_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;
	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;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Driver for Sound Core PDAudioCF soundcards
	3	*
	4	* PCM part
	5	*
c1017a4c	6	* Copyright (c) 2003 by Jaroslav Kysela <perex@perex.cz>
1da177e4 LT	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*/
	22
1da177e4 LT	23	#include <linux/delay.h>
	24	#include <sound/core.h>
	25	#include <sound/asoundef.h>
	26	#include "pdaudiocf.h"
	27
	28
1da177e4 LT	29	/*
	30	* clear the SRAM contents
	31	*/
db131548	32	static int pdacf_pcm_clear_sram(struct snd_pdacf *chip)
1da177e4 LT	33	{
	34	int max_loop = 64 * 1024;
	35
	36	while (inw(chip->port + PDAUDIOCF_REG_RDP) != inw(chip->port + PDAUDIOCF_REG_WDP)) {
	37	if (max_loop-- < 0)
	38	return -EIO;
	39	inw(chip->port + PDAUDIOCF_REG_MD);
	40	}
	41	return 0;
	42	}
	43
	44	/*
	45	* pdacf_pcm_trigger - trigger callback for capture
	46	*/
db131548	47	static int pdacf_pcm_trigger(struct snd_pcm_substream *subs, int cmd)
1da177e4	48	{
db131548 TI	49	struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
db131548 TI	50	struct snd_pcm_runtime *runtime = subs->runtime;
1da177e4 LT	51	int inc, ret = 0, rate;
	52	unsigned short mask, val, tmp;
	53
	54	if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
	55	return -EBUSY;
	56
	57	switch (cmd) {
	58	case SNDRV_PCM_TRIGGER_START:
	59	chip->pcm_hwptr = 0;
	60	chip->pcm_tdone = 0;
	61	/* fall thru */
	62	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	63	case SNDRV_PCM_TRIGGER_RESUME:
	64	mask = 0;
	65	val = PDAUDIOCF_RECORD;
	66	inc = 1;
	67	rate = snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_STAT\|AK4117_CHECK_NO_RATE);
	68	break;
	69	case SNDRV_PCM_TRIGGER_STOP:
	70	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	71	case SNDRV_PCM_TRIGGER_SUSPEND:
	72	mask = PDAUDIOCF_RECORD;
	73	val = 0;
	74	inc = -1;
	75	rate = 0;
	76	break;
	77	default:
	78	return -EINVAL;
	79	}
	80	spin_lock(&chip->reg_lock);
	81	chip->pcm_running += inc;
	82	tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
	83	if (chip->pcm_running) {
	84	if ((chip->ak4117->rcs0 & AK4117_UNLCK) \|\| runtime->rate != rate) {
	85	chip->pcm_running -= inc;
	86	ret = -EIO;
	87	goto __end;
	88	}
	89	}
	90	tmp &= ~mask;
	91	tmp \|= val;
	92	pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, tmp);
	93	__end:
	94	spin_unlock(&chip->reg_lock);
	95	snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_RATE);
	96	return ret;
	97	}
	98
	99	/*
	100	* pdacf_pcm_hw_params - hw_params callback for playback and capture
	101	*/
db131548 TI	102	static int pdacf_pcm_hw_params(struct snd_pcm_substream *subs,
db131548 TI	103	struct snd_pcm_hw_params *hw_params)
1da177e4	104	{
d20fb5dc CL	105	return snd_pcm_lib_alloc_vmalloc_32_buffer
d20fb5dc CL	106	(subs, params_buffer_bytes(hw_params));
1da177e4 LT	107	}
	108
	109	/*
	110	* pdacf_pcm_hw_free - hw_free callback for playback and capture
	111	*/
db131548	112	static int pdacf_pcm_hw_free(struct snd_pcm_substream *subs)
1da177e4	113	{
d20fb5dc	114	return snd_pcm_lib_free_vmalloc_buffer(subs);
1da177e4 LT	115	}
	116
	117	/*
	118	* pdacf_pcm_prepare - prepare callback for playback and capture
	119	*/
db131548	120	static int pdacf_pcm_prepare(struct snd_pcm_substream *subs)
1da177e4	121	{
db131548 TI	122	struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
db131548 TI	123	struct snd_pcm_runtime *runtime = subs->runtime;
1da177e4 LT	124	u16 val, nval, aval;
	125
	126	if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
	127	return -EBUSY;
	128
	129	chip->pcm_channels = runtime->channels;
	130
	131	chip->pcm_little = snd_pcm_format_little_endian(runtime->format) > 0;
	132	#ifdef SNDRV_LITTLE_ENDIAN
	133	chip->pcm_swab = snd_pcm_format_big_endian(runtime->format) > 0;
	134	#else
	135	chip->pcm_swab = chip->pcm_little;
	136	#endif
	137
	138	if (snd_pcm_format_unsigned(runtime->format))
	139	chip->pcm_xor = 0x80008000;
	140
	141	if (pdacf_pcm_clear_sram(chip) < 0)
	142	return -EIO;
	143
	144	val = nval = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
	145	nval &= ~(PDAUDIOCF_DATAFMT0\|PDAUDIOCF_DATAFMT1);
	146	switch (runtime->format) {
	147	case SNDRV_PCM_FORMAT_S16_LE:
	148	case SNDRV_PCM_FORMAT_S16_BE:
	149	break;
	150	default: /* 24-bit */
	151	nval \|= PDAUDIOCF_DATAFMT0 \| PDAUDIOCF_DATAFMT1;
	152	break;
	153	}
	154	aval = 0;
	155	chip->pcm_sample = 4;
	156	switch (runtime->format) {
	157	case SNDRV_PCM_FORMAT_S16_LE:
	158	case SNDRV_PCM_FORMAT_S16_BE:
	159	aval = AK4117_DIF_16R;
	160	chip->pcm_frame = 2;
	161	chip->pcm_sample = 2;
	162	break;
	163	case SNDRV_PCM_FORMAT_S24_3LE:
	164	case SNDRV_PCM_FORMAT_S24_3BE:
	165	chip->pcm_sample = 3;
93b1fae4	166	/* fall through */
1da177e4 LT	167	default: /* 24-bit */
	168	aval = AK4117_DIF_24R;
	169	chip->pcm_frame = 3;
	170	chip->pcm_xor &= 0xffff0000;
	171	break;
	172	}
	173
	174	if (val != nval) {
	175	snd_ak4117_reg_write(chip->ak4117, AK4117_REG_IO, AK4117_DIF2\|AK4117_DIF1\|AK4117_DIF0, aval);
	176	pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, nval);
	177	}
	178
	179	val = pdacf_reg_read(chip, PDAUDIOCF_REG_IER);
	180	val &= ~(PDAUDIOCF_IRQLVLEN1);
	181	val \|= PDAUDIOCF_IRQLVLEN0;
	182	pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val);
	183
	184	chip->pcm_size = runtime->buffer_size;
	185	chip->pcm_period = runtime->period_size;
	186	chip->pcm_area = runtime->dma_area;
	187
	188	return 0;
	189	}
	190
	191
	192	/*
	193	* capture hw information
	194	*/
	195
db131548	196	static struct snd_pcm_hardware pdacf_pcm_capture_hw = {
1da177e4 LT	197	.info = (SNDRV_PCM_INFO_MMAP \| SNDRV_PCM_INFO_INTERLEAVED \|
1da177e4 LT	198	SNDRV_PCM_INFO_PAUSE \| SNDRV_PCM_INFO_RESUME \|
2008f137 TI	199	SNDRV_PCM_INFO_MMAP_VALID \|
2008f137 TI	200	SNDRV_PCM_INFO_BATCH),
1da177e4 LT	201	.formats = SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S16_BE \|
	202	SNDRV_PCM_FMTBIT_S24_3LE \| SNDRV_PCM_FMTBIT_S24_3BE \|
	203	SNDRV_PCM_FMTBIT_S32_LE \| SNDRV_PCM_FMTBIT_S32_BE,
	204	.rates = SNDRV_PCM_RATE_32000 \|
	205	SNDRV_PCM_RATE_44100 \|
	206	SNDRV_PCM_RATE_48000 \|
	207	SNDRV_PCM_RATE_88200 \|
	208	SNDRV_PCM_RATE_96000 \|
	209	SNDRV_PCM_RATE_176400 \|
	210	SNDRV_PCM_RATE_192000,
	211	.rate_min = 32000,
	212	.rate_max = 192000,
	213	.channels_min = 1,
	214	.channels_max = 2,
	215	.buffer_bytes_max = (512*1024),
	216	.period_bytes_min = 8*1024,
	217	.period_bytes_max = (64*1024),
	218	.periods_min = 2,
	219	.periods_max = 128,
	220	.fifo_size = 0,
	221	};
	222
	223
	224	/*
	225	* pdacf_pcm_capture_open - open callback for capture
	226	*/
db131548	227	static int pdacf_pcm_capture_open(struct snd_pcm_substream *subs)
1da177e4	228	{
db131548 TI	229	struct snd_pcm_runtime *runtime = subs->runtime;
db131548 TI	230	struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
1da177e4 LT	231
	232	if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
	233	return -EBUSY;
	234
	235	runtime->hw = pdacf_pcm_capture_hw;
	236	runtime->private_data = chip;
	237	chip->pcm_substream = subs;
	238
	239	return 0;
	240	}
	241
	242	/*
	243	* pdacf_pcm_capture_close - close callback for capture
	244	*/
db131548	245	static int pdacf_pcm_capture_close(struct snd_pcm_substream *subs)
1da177e4	246	{
db131548	247	struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
1da177e4 LT	248
	249	if (!chip)
	250	return -EINVAL;
	251	pdacf_reinit(chip, 0);
	252	chip->pcm_substream = NULL;
	253	return 0;
	254	}
	255
	256
	257	/*
	258	* pdacf_pcm_capture_pointer - pointer callback for capture
	259	*/
db131548	260	static snd_pcm_uframes_t pdacf_pcm_capture_pointer(struct snd_pcm_substream *subs)
1da177e4	261	{
db131548	262	struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
1da177e4 LT	263	return chip->pcm_hwptr;
	264	}
	265
	266	/*
	267	* operators for PCM capture
	268	*/
db131548	269	static struct snd_pcm_ops pdacf_pcm_capture_ops = {
1da177e4 LT	270	.open = pdacf_pcm_capture_open,
	271	.close = pdacf_pcm_capture_close,
	272	.ioctl = snd_pcm_lib_ioctl,
	273	.hw_params = pdacf_pcm_hw_params,
	274	.hw_free = pdacf_pcm_hw_free,
	275	.prepare = pdacf_pcm_prepare,
	276	.trigger = pdacf_pcm_trigger,
	277	.pointer = pdacf_pcm_capture_pointer,
d20fb5dc	278	.page = snd_pcm_lib_get_vmalloc_page,
c32d977b	279	.mmap = snd_pcm_lib_mmap_vmalloc,
1da177e4 LT	280	};
	281
	282
1da177e4 LT	283	/*
	284	* snd_pdacf_pcm_new - create and initialize a pcm
	285	*/
db131548	286	int snd_pdacf_pcm_new(struct snd_pdacf *chip)
1da177e4	287	{
db131548	288	struct snd_pcm *pcm;
1da177e4 LT	289	int err;
	290
	291	err = snd_pcm_new(chip->card, "PDAudioCF", 0, 0, 1, &pcm);
	292	if (err < 0)
	293	return err;
	294
	295	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pdacf_pcm_capture_ops);
	296
	297	pcm->private_data = chip;
1da177e4 LT	298	pcm->info_flags = 0;
	299	strcpy(pcm->name, chip->card->shortname);
	300	chip->pcm = pcm;
	301
	302	err = snd_ak4117_build(chip->ak4117, pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);
	303	if (err < 0)
	304	return err;
	305
	306	return 0;
	307	}