[linux-2.6-block.git] / sound / firewire / fireworks / fireworks_pcm.c

/*
 * fireworks_pcm.c - a part of driver for Fireworks based devices
 *
 * Copyright (c) 2009-2010 Clemens Ladisch
 * Copyright (c) 2013-2014 Takashi Sakamoto
 *
 * Licensed under the terms of the GNU General Public License, version 2.
 */
#include "./fireworks.h"

/*
 * NOTE:
 * Fireworks changes its AMDTP channels for PCM data according to its sampling
 * rate. There are three modes. Here _XX is either _rx or _tx.
 *  0:  32.0- 48.0 kHz then snd_efw_hwinfo.amdtp_XX_pcm_channels applied
 *  1:  88.2- 96.0 kHz then snd_efw_hwinfo.amdtp_XX_pcm_channels_2x applied
 *  2: 176.4-192.0 kHz then snd_efw_hwinfo.amdtp_XX_pcm_channels_4x applied
 *
 * The number of PCM channels for analog input and output are always fixed but
 * the number of PCM channels for digital input and output are differed.
 *
 * Additionally, according to "AudioFire Owner's Manual Version 2.2", in some
 * model, the number of PCM channels for digital input has more restriction
 * depending on which digital interface is selected.
 *  - S/PDIF coaxial and optical	: use input 1-2
 *  - ADAT optical at 32.0-48.0 kHz	: use input 1-8
 *  - ADAT optical at 88.2-96.0 kHz	: use input 1-4 (S/MUX format)
 *
 * The data in AMDTP channels for blank PCM channels are zero.
 */
static const unsigned int freq_table[] = {
	/* multiplier mode 0 */
	[0] = 32000,
	[1] = 44100,
	[2] = 48000,
	/* multiplier mode 1 */
	[3] = 88200,
	[4] = 96000,
	/* multiplier mode 2 */
	[5] = 176400,
	[6] = 192000,
};

static inline unsigned int
get_multiplier_mode_with_index(unsigned int index)
{
	return ((int)index - 1) / 2;
}

int snd_efw_get_multiplier_mode(unsigned int sampling_rate, unsigned int *mode)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
		if (freq_table[i] == sampling_rate) {
			*mode = get_multiplier_mode_with_index(i);
			return 0;
		}
	}

	return -EINVAL;
}

static int
hw_rule_rate(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule)
{
	unsigned int *pcm_channels = rule->private;
	struct snd_interval *r =
		hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
	const struct snd_interval *c =
		hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
	struct snd_interval t = {
		.min = UINT_MAX, .max = 0, .integer = 1
	};
	unsigned int i, mode;

	for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
		mode = get_multiplier_mode_with_index(i);
		if (!snd_interval_test(c, pcm_channels[mode]))
			continue;

		t.min = min(t.min, freq_table[i]);
		t.max = max(t.max, freq_table[i]);
	}

	return snd_interval_refine(r, &t);
}

static int
hw_rule_channels(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule)
{
	unsigned int *pcm_channels = rule->private;
	struct snd_interval *c =
		hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
	const struct snd_interval *r =
		hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
	struct snd_interval t = {
		.min = UINT_MAX, .max = 0, .integer = 1
	};
	unsigned int i, mode;

	for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
		mode = get_multiplier_mode_with_index(i);
		if (!snd_interval_test(r, freq_table[i]))
			continue;

		t.min = min(t.min, pcm_channels[mode]);
		t.max = max(t.max, pcm_channels[mode]);
	}

	return snd_interval_refine(c, &t);
}

static void
limit_channels(struct snd_pcm_hardware *hw, unsigned int *pcm_channels)
{
	unsigned int i, mode;

	hw->channels_min = UINT_MAX;
	hw->channels_max = 0;

	for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
		mode = get_multiplier_mode_with_index(i);
		if (pcm_channels[mode] == 0)
			continue;

		hw->channels_min = min(hw->channels_min, pcm_channels[mode]);
		hw->channels_max = max(hw->channels_max, pcm_channels[mode]);
	}
}

static void
limit_period_and_buffer(struct snd_pcm_hardware *hw)
{
	hw->periods_min = 2;		/* SNDRV_PCM_INFO_BATCH */
	hw->periods_max = UINT_MAX;

	hw->period_bytes_min = 4 * hw->channels_max;	/* bytes for a frame */

	/* Just to prevent from allocating much pages. */
	hw->period_bytes_max = hw->period_bytes_min * 2048;
	hw->buffer_bytes_max = hw->period_bytes_max * hw->periods_min;
}

static int
pcm_init_hw_params(struct snd_efw *efw,
		   struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct amdtp_stream *s;
	unsigned int *pcm_channels;
	int err;

	runtime->hw.info = SNDRV_PCM_INFO_BATCH |
			   SNDRV_PCM_INFO_BLOCK_TRANSFER |
			   SNDRV_PCM_INFO_INTERLEAVED |
			   SNDRV_PCM_INFO_JOINT_DUPLEX |
			   SNDRV_PCM_INFO_MMAP |
			   SNDRV_PCM_INFO_MMAP_VALID;

	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
		runtime->hw.formats = AM824_IN_PCM_FORMAT_BITS;
		s = &efw->tx_stream;
		pcm_channels = efw->pcm_capture_channels;
	} else {
		runtime->hw.formats = AM824_OUT_PCM_FORMAT_BITS;
		s = &efw->rx_stream;
		pcm_channels = efw->pcm_playback_channels;
	}

	/* limit rates */
	runtime->hw.rates = efw->supported_sampling_rate,
	snd_pcm_limit_hw_rates(runtime);

	limit_channels(&runtime->hw, pcm_channels);
	limit_period_and_buffer(&runtime->hw);

	err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
				  hw_rule_channels, pcm_channels,
				  SNDRV_PCM_HW_PARAM_RATE, -1);
	if (err < 0)
		goto end;

	err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
				  hw_rule_rate, pcm_channels,
				  SNDRV_PCM_HW_PARAM_CHANNELS, -1);
	if (err < 0)
		goto end;

	err = amdtp_am824_add_pcm_hw_constraints(s, runtime);
end:
	return err;
}

static int pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_efw *efw = substream->private_data;
	unsigned int sampling_rate;
	enum snd_efw_clock_source clock_source;
	int err;

	err = snd_efw_stream_lock_try(efw);
	if (err < 0)
		goto end;

	err = pcm_init_hw_params(efw, substream);
	if (err < 0)
		goto err_locked;

	err = snd_efw_command_get_clock_source(efw, &clock_source);
	if (err < 0)
		goto err_locked;

	/*
	 * When source of clock is not internal or any PCM streams are running,
	 * available sampling rate is limited at current sampling rate.
	 */
	if ((clock_source != SND_EFW_CLOCK_SOURCE_INTERNAL) ||
	    amdtp_stream_pcm_running(&efw->tx_stream) ||
	    amdtp_stream_pcm_running(&efw->rx_stream)) {
		err = snd_efw_command_get_sampling_rate(efw, &sampling_rate);
		if (err < 0)
			goto err_locked;
		substream->runtime->hw.rate_min = sampling_rate;
		substream->runtime->hw.rate_max = sampling_rate;
	}

	snd_pcm_set_sync(substream);
end:
	return err;
err_locked:
	snd_efw_stream_lock_release(efw);
	return err;
}

static int pcm_close(struct snd_pcm_substream *substream)
{
	struct snd_efw *efw = substream->private_data;
	snd_efw_stream_lock_release(efw);
	return 0;
}

static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
				 struct snd_pcm_hw_params *hw_params)
{
	struct snd_efw *efw = substream->private_data;
	int err;

	err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
					       params_buffer_bytes(hw_params));
	if (err < 0)
		return err;

	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
		mutex_lock(&efw->mutex);
		efw->capture_substreams++;
		mutex_unlock(&efw->mutex);
	}

	return 0;
}
static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
				  struct snd_pcm_hw_params *hw_params)
{
	struct snd_efw *efw = substream->private_data;
	int err;

	err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
					       params_buffer_bytes(hw_params));
	if (err < 0)
		return err;

	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
		mutex_lock(&efw->mutex);
		efw->playback_substreams++;
		mutex_unlock(&efw->mutex);
	}

	return 0;
}

static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_efw *efw = substream->private_data;

	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) {
		mutex_lock(&efw->mutex);
		efw->capture_substreams--;
		mutex_unlock(&efw->mutex);
	}

	snd_efw_stream_stop_duplex(efw);

	return snd_pcm_lib_free_vmalloc_buffer(substream);
}
static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_efw *efw = substream->private_data;

	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) {
		mutex_lock(&efw->mutex);
		efw->playback_substreams--;
		mutex_unlock(&efw->mutex);
	}

	snd_efw_stream_stop_duplex(efw);

	return snd_pcm_lib_free_vmalloc_buffer(substream);
}

static int pcm_capture_prepare(struct snd_pcm_substream *substream)
{
	struct snd_efw *efw = substream->private_data;
	struct snd_pcm_runtime *runtime = substream->runtime;
	int err;

	err = snd_efw_stream_start_duplex(efw, runtime->rate);
	if (err >= 0)
		amdtp_stream_pcm_prepare(&efw->tx_stream);

	return err;
}
static int pcm_playback_prepare(struct snd_pcm_substream *substream)
{
	struct snd_efw *efw = substream->private_data;
	struct snd_pcm_runtime *runtime = substream->runtime;
	int err;

	err = snd_efw_stream_start_duplex(efw, runtime->rate);
	if (err >= 0)
		amdtp_stream_pcm_prepare(&efw->rx_stream);

	return err;
}

static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct snd_efw *efw = substream->private_data;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		amdtp_stream_pcm_trigger(&efw->tx_stream, substream);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		amdtp_stream_pcm_trigger(&efw->tx_stream, NULL);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}
static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct snd_efw *efw = substream->private_data;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		amdtp_stream_pcm_trigger(&efw->rx_stream, substream);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		amdtp_stream_pcm_trigger(&efw->rx_stream, NULL);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
{
	struct snd_efw *efw = sbstrm->private_data;
	return amdtp_stream_pcm_pointer(&efw->tx_stream);
}
static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
{
	struct snd_efw *efw = sbstrm->private_data;
	return amdtp_stream_pcm_pointer(&efw->rx_stream);
}

int snd_efw_create_pcm_devices(struct snd_efw *efw)
{
	static const struct snd_pcm_ops capture_ops = {
		.open		= pcm_open,
		.close		= pcm_close,
		.ioctl		= snd_pcm_lib_ioctl,
		.hw_params	= pcm_capture_hw_params,
		.hw_free	= pcm_capture_hw_free,
		.prepare	= pcm_capture_prepare,
		.trigger	= pcm_capture_trigger,
		.pointer	= pcm_capture_pointer,
		.page		= snd_pcm_lib_get_vmalloc_page,
	};
	static const struct snd_pcm_ops playback_ops = {
		.open		= pcm_open,
		.close		= pcm_close,
		.ioctl		= snd_pcm_lib_ioctl,
		.hw_params	= pcm_playback_hw_params,
		.hw_free	= pcm_playback_hw_free,
		.prepare	= pcm_playback_prepare,
		.trigger	= pcm_playback_trigger,
		.pointer	= pcm_playback_pointer,
		.page		= snd_pcm_lib_get_vmalloc_page,
		.mmap		= snd_pcm_lib_mmap_vmalloc,
	};
	struct snd_pcm *pcm;
	int err;

	err = snd_pcm_new(efw->card, efw->card->driver, 0, 1, 1, &pcm);
	if (err < 0)
		goto end;

	pcm->private_data = efw;
	snprintf(pcm->name, sizeof(pcm->name), "%s PCM", efw->card->shortname);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
end:
	return err;
}
Commit	Line	Data
aa02bb6e TS	1	/*
	2	* fireworks_pcm.c - a part of driver for Fireworks based devices
	3	*
	4	* Copyright (c) 2009-2010 Clemens Ladisch
	5	* Copyright (c) 2013-2014 Takashi Sakamoto
	6	*
	7	* Licensed under the terms of the GNU General Public License, version 2.
	8	*/
	9	#include "./fireworks.h"
	10
	11	/*
	12	* NOTE:
	13	* Fireworks changes its AMDTP channels for PCM data according to its sampling
	14	* rate. There are three modes. Here _XX is either _rx or _tx.
	15	* 0: 32.0- 48.0 kHz then snd_efw_hwinfo.amdtp_XX_pcm_channels applied
	16	* 1: 88.2- 96.0 kHz then snd_efw_hwinfo.amdtp_XX_pcm_channels_2x applied
	17	* 2: 176.4-192.0 kHz then snd_efw_hwinfo.amdtp_XX_pcm_channels_4x applied
	18	*
	19	* The number of PCM channels for analog input and output are always fixed but
	20	* the number of PCM channels for digital input and output are differed.
	21	*
	22	* Additionally, according to "AudioFire Owner's Manual Version 2.2", in some
	23	* model, the number of PCM channels for digital input has more restriction
	24	* depending on which digital interface is selected.
	25	* - S/PDIF coaxial and optical : use input 1-2
	26	* - ADAT optical at 32.0-48.0 kHz : use input 1-8
	27	* - ADAT optical at 88.2-96.0 kHz : use input 1-4 (S/MUX format)
	28	*
	29	* The data in AMDTP channels for blank PCM channels are zero.
	30	*/
	31	static const unsigned int freq_table[] = {
	32	/* multiplier mode 0 */
	33	[0] = 32000,
	34	[1] = 44100,
	35	[2] = 48000,
	36	/* multiplier mode 1 */
	37	[3] = 88200,
	38	[4] = 96000,
	39	/* multiplier mode 2 */
	40	[5] = 176400,
	41	[6] = 192000,
	42	};
	43
	44	static inline unsigned int
	45	get_multiplier_mode_with_index(unsigned int index)
	46	{
	47	return ((int)index - 1) / 2;
	48	}
	49
	50	int snd_efw_get_multiplier_mode(unsigned int sampling_rate, unsigned int *mode)
	51	{
	52	unsigned int i;
	53
	54	for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
	55	if (freq_table[i] == sampling_rate) {
	56	*mode = get_multiplier_mode_with_index(i);
	57	return 0;
	58	}
	59	}
	60
	61	return -EINVAL;
	62	}
	63
	64	static int
65	hw_rule_rate(struct snd_pcm_hw_params params, struct snd_pcm_hw_rule rule)
66	{
67	unsigned int *pcm_channels = rule->private;
68	struct snd_interval *r =
69	hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
70	const struct snd_interval *c =
71	hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
72	struct snd_interval t = {
73	.min = UINT_MAX, .max = 0, .integer = 1
74	};
75	unsigned int i, mode;
76
77	for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
78	mode = get_multiplier_mode_with_index(i);
79	if (!snd_interval_test(c, pcm_channels[mode]))
80	continue;
81
82	t.min = min(t.min, freq_table[i]);
83	t.max = max(t.max, freq_table[i]);
84	}
85
86	return snd_interval_refine(r, &t);
87	}
88
89	static int
90	hw_rule_channels(struct snd_pcm_hw_params params, struct snd_pcm_hw_rule rule)
91	{
92	unsigned int *pcm_channels = rule->private;
93	struct snd_interval *c =
94	hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
95	const struct snd_interval *r =
96	hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
97	struct snd_interval t = {
98	.min = UINT_MAX, .max = 0, .integer = 1
99	};
100	unsigned int i, mode;
101
102	for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
103	mode = get_multiplier_mode_with_index(i);
104	if (!snd_interval_test(r, freq_table[i]))
105	continue;
106
107	t.min = min(t.min, pcm_channels[mode]);
108	t.max = max(t.max, pcm_channels[mode]);
109	}
110
111	return snd_interval_refine(c, &t);
112	}
113
114	static void
115	limit_channels(struct snd_pcm_hardware hw, unsigned int pcm_channels)
116	{
117	unsigned int i, mode;
118
119	hw->channels_min = UINT_MAX;
120	hw->channels_max = 0;
121
122	for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
123	mode = get_multiplier_mode_with_index(i);
124	if (pcm_channels[mode] == 0)
125	continue;
126
127	hw->channels_min = min(hw->channels_min, pcm_channels[mode]);
128	hw->channels_max = max(hw->channels_max, pcm_channels[mode]);
129	}
130	}
131
132	static void
133	limit_period_and_buffer(struct snd_pcm_hardware *hw)
134	{
135	hw->periods_min = 2; /* SNDRV_PCM_INFO_BATCH */
136	hw->periods_max = UINT_MAX;
137
138	hw->period_bytes_min = 4 * hw->channels_max; /* bytes for a frame */
139
140	/* Just to prevent from allocating much pages. */
141	hw->period_bytes_max = hw->period_bytes_min * 2048;
142	hw->buffer_bytes_max = hw->period_bytes_max * hw->periods_min;
143	}
144
145	static int
146	pcm_init_hw_params(struct snd_efw *efw,
147	struct snd_pcm_substream *substream)
148	{
149	struct snd_pcm_runtime *runtime = substream->runtime;
150	struct amdtp_stream *s;
151	unsigned int *pcm_channels;
152	int err;
153
154	runtime->hw.info = SNDRV_PCM_INFO_BATCH \|
155	SNDRV_PCM_INFO_BLOCK_TRANSFER \|
156	SNDRV_PCM_INFO_INTERLEAVED \|
157	SNDRV_PCM_INFO_JOINT_DUPLEX \|
158	SNDRV_PCM_INFO_MMAP \|
159	SNDRV_PCM_INFO_MMAP_VALID;
160
161	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
49c7b3fc	162	runtime->hw.formats = AM824_IN_PCM_FORMAT_BITS;
aa02bb6e TS	163	s = &efw->tx_stream;
	164	pcm_channels = efw->pcm_capture_channels;
	165	} else {
49c7b3fc	166	runtime->hw.formats = AM824_OUT_PCM_FORMAT_BITS;
aa02bb6e TS	167	s = &efw->rx_stream;
	168	pcm_channels = efw->pcm_playback_channels;
	169	}
	170
	171	/* limit rates */
	172	runtime->hw.rates = efw->supported_sampling_rate,
	173	snd_pcm_limit_hw_rates(runtime);
	174
	175	limit_channels(&runtime->hw, pcm_channels);
	176	limit_period_and_buffer(&runtime->hw);
	177
	178	err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
	179	hw_rule_channels, pcm_channels,
	180	SNDRV_PCM_HW_PARAM_RATE, -1);
	181	if (err < 0)
	182	goto end;
	183
	184	err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
	185	hw_rule_rate, pcm_channels,
	186	SNDRV_PCM_HW_PARAM_CHANNELS, -1);
	187	if (err < 0)
	188	goto end;
	189
bc8500da	190	err = amdtp_am824_add_pcm_hw_constraints(s, runtime);
aa02bb6e TS	191	end:
	192	return err;
	193	}
	194
	195	static int pcm_open(struct snd_pcm_substream *substream)
	196	{
	197	struct snd_efw *efw = substream->private_data;
a6b598bf TS	198	unsigned int sampling_rate;
a6b598bf TS	199	enum snd_efw_clock_source clock_source;
aa02bb6e TS	200	int err;
aa02bb6e TS	201
594ddced	202	err = snd_efw_stream_lock_try(efw);
aa02bb6e TS	203	if (err < 0)
	204	goto end;
	205
594ddced TS	206	err = pcm_init_hw_params(efw, substream);
	207	if (err < 0)
	208	goto err_locked;
	209
aa02bb6e TS	210	err = snd_efw_command_get_clock_source(efw, &clock_source);
aa02bb6e TS	211	if (err < 0)
594ddced	212	goto err_locked;
aa02bb6e TS	213
	214	/*
	215	* When source of clock is not internal or any PCM streams are running,
	216	* available sampling rate is limited at current sampling rate.
	217	*/
	218	if ((clock_source != SND_EFW_CLOCK_SOURCE_INTERNAL) \|\|
	219	amdtp_stream_pcm_running(&efw->tx_stream) \|\|
	220	amdtp_stream_pcm_running(&efw->rx_stream)) {
	221	err = snd_efw_command_get_sampling_rate(efw, &sampling_rate);
	222	if (err < 0)
594ddced	223	goto err_locked;
aa02bb6e TS	224	substream->runtime->hw.rate_min = sampling_rate;
	225	substream->runtime->hw.rate_max = sampling_rate;
	226	}
	227
	228	snd_pcm_set_sync(substream);
	229	end:
	230	return err;
594ddced TS	231	err_locked:
	232	snd_efw_stream_lock_release(efw);
	233	return err;
aa02bb6e TS	234	}
	235
	236	static int pcm_close(struct snd_pcm_substream *substream)
	237	{
594ddced TS	238	struct snd_efw *efw = substream->private_data;
594ddced TS	239	snd_efw_stream_lock_release(efw);
aa02bb6e TS	240	return 0;
	241	}
	242
	243	static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
	244	struct snd_pcm_hw_params *hw_params)
	245	{
	246	struct snd_efw *efw = substream->private_data;
22c103cd TS	247	int err;
	248
	249	err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
	250	params_buffer_bytes(hw_params));
	251	if (err < 0)
	252	return err;
aa02bb6e	253
ea54a374 TS	254	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
ea54a374 TS	255	mutex_lock(&efw->mutex);
4d2c50a0	256	efw->capture_substreams++;
ea54a374 TS	257	mutex_unlock(&efw->mutex);
ea54a374 TS	258	}
85130cb4	259
22c103cd	260	return 0;
aa02bb6e TS	261	}
	262	static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
	263	struct snd_pcm_hw_params *hw_params)
	264	{
	265	struct snd_efw *efw = substream->private_data;
22c103cd TS	266	int err;
	267
	268	err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
	269	params_buffer_bytes(hw_params));
	270	if (err < 0)
	271	return err;
aa02bb6e	272
ea54a374 TS	273	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
ea54a374 TS	274	mutex_lock(&efw->mutex);
4d2c50a0	275	efw->playback_substreams++;
ea54a374 TS	276	mutex_unlock(&efw->mutex);
ea54a374 TS	277	}
85130cb4	278
22c103cd	279	return 0;
aa02bb6e TS	280	}
	281
	282	static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
	283	{
	284	struct snd_efw *efw = substream->private_data;
	285
ea54a374 TS	286	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) {
ea54a374 TS	287	mutex_lock(&efw->mutex);
4d2c50a0	288	efw->capture_substreams--;
ea54a374 TS	289	mutex_unlock(&efw->mutex);
ea54a374 TS	290	}
aa02bb6e TS	291
	292	snd_efw_stream_stop_duplex(efw);
	293
	294	return snd_pcm_lib_free_vmalloc_buffer(substream);
	295	}
	296	static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
	297	{
	298	struct snd_efw *efw = substream->private_data;
	299
ea54a374 TS	300	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) {
ea54a374 TS	301	mutex_lock(&efw->mutex);
4d2c50a0	302	efw->playback_substreams--;
ea54a374 TS	303	mutex_unlock(&efw->mutex);
ea54a374 TS	304	}
aa02bb6e TS	305
	306	snd_efw_stream_stop_duplex(efw);
	307
	308	return snd_pcm_lib_free_vmalloc_buffer(substream);
	309	}
	310
	311	static int pcm_capture_prepare(struct snd_pcm_substream *substream)
	312	{
	313	struct snd_efw *efw = substream->private_data;
	314	struct snd_pcm_runtime *runtime = substream->runtime;
	315	int err;
	316
	317	err = snd_efw_stream_start_duplex(efw, runtime->rate);
	318	if (err >= 0)
	319	amdtp_stream_pcm_prepare(&efw->tx_stream);
	320
	321	return err;
	322	}
	323	static int pcm_playback_prepare(struct snd_pcm_substream *substream)
	324	{
	325	struct snd_efw *efw = substream->private_data;
	326	struct snd_pcm_runtime *runtime = substream->runtime;
	327	int err;
	328
	329	err = snd_efw_stream_start_duplex(efw, runtime->rate);
	330	if (err >= 0)
	331	amdtp_stream_pcm_prepare(&efw->rx_stream);
	332
	333	return err;
	334	}
	335
	336	static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
	337	{
	338	struct snd_efw *efw = substream->private_data;
	339
	340	switch (cmd) {
	341	case SNDRV_PCM_TRIGGER_START:
	342	amdtp_stream_pcm_trigger(&efw->tx_stream, substream);
	343	break;
	344	case SNDRV_PCM_TRIGGER_STOP:
	345	amdtp_stream_pcm_trigger(&efw->tx_stream, NULL);
	346	break;
	347	default:
	348	return -EINVAL;
	349	}
	350
	351	return 0;
	352	}
	353	static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
	354	{
	355	struct snd_efw *efw = substream->private_data;
	356
	357	switch (cmd) {
	358	case SNDRV_PCM_TRIGGER_START:
	359	amdtp_stream_pcm_trigger(&efw->rx_stream, substream);
	360	break;
	361	case SNDRV_PCM_TRIGGER_STOP:
	362	amdtp_stream_pcm_trigger(&efw->rx_stream, NULL);
	363	break;
	364	default:
	365	return -EINVAL;
	366	}
	367
	368	return 0;
369	}
370
371	static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
372	{
373	struct snd_efw *efw = sbstrm->private_data;
374	return amdtp_stream_pcm_pointer(&efw->tx_stream);
375	}
376	static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
377	{
378	struct snd_efw *efw = sbstrm->private_data;
379	return amdtp_stream_pcm_pointer(&efw->rx_stream);
380	}
381
aa02bb6e TS	382	int snd_efw_create_pcm_devices(struct snd_efw *efw)
aa02bb6e TS	383	{
7cdc887a TS	384	static const struct snd_pcm_ops capture_ops = {
	385	.open = pcm_open,
	386	.close = pcm_close,
	387	.ioctl = snd_pcm_lib_ioctl,
	388	.hw_params = pcm_capture_hw_params,
	389	.hw_free = pcm_capture_hw_free,
	390	.prepare = pcm_capture_prepare,
	391	.trigger = pcm_capture_trigger,
	392	.pointer = pcm_capture_pointer,
	393	.page = snd_pcm_lib_get_vmalloc_page,
	394	};
	395	static const struct snd_pcm_ops playback_ops = {
	396	.open = pcm_open,
	397	.close = pcm_close,
	398	.ioctl = snd_pcm_lib_ioctl,
	399	.hw_params = pcm_playback_hw_params,
	400	.hw_free = pcm_playback_hw_free,
	401	.prepare = pcm_playback_prepare,
	402	.trigger = pcm_playback_trigger,
	403	.pointer = pcm_playback_pointer,
	404	.page = snd_pcm_lib_get_vmalloc_page,
	405	.mmap = snd_pcm_lib_mmap_vmalloc,
	406	};
aa02bb6e TS	407	struct snd_pcm *pcm;
	408	int err;
	409
	410	err = snd_pcm_new(efw->card, efw->card->driver, 0, 1, 1, &pcm);
	411	if (err < 0)
	412	goto end;
	413
	414	pcm->private_data = efw;
	415	snprintf(pcm->name, sizeof(pcm->name), "%s PCM", efw->card->shortname);
7cdc887a TS	416	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
7cdc887a TS	417	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
aa02bb6e TS	418	end:
	419	return err;
	420	}
	421