[alsa-devel] [PATCH 24/39] fireworks: Add PCM interface
Takashi Sakamoto
o-takashi at sakamocchi.jp
Wed Mar 5 11:48:12 CET 2014
This commit adds a functionality to capture/playback PCM samples.
When AMDTP stream is already running for PCM or the source of clock is not
internal, available sampling rate is limited at current one.
---
sound/firewire/Kconfig | 1 +
sound/firewire/fireworks/Makefile | 2 +-
sound/firewire/fireworks/fireworks.c | 4 +
sound/firewire/fireworks/fireworks.h | 4 +
sound/firewire/fireworks/fireworks_pcm.c | 468 ++++++++++++++++++++++++++++
sound/firewire/fireworks/fireworks_stream.c | 33 --
6 files changed, 478 insertions(+), 34 deletions(-)
create mode 100644 sound/firewire/fireworks/fireworks_pcm.c
diff --git a/sound/firewire/Kconfig b/sound/firewire/Kconfig
index 36a1212..fb39f9c 100644
--- a/sound/firewire/Kconfig
+++ b/sound/firewire/Kconfig
@@ -65,6 +65,7 @@ config SND_FIREWORKS
tristate "Echo Fireworks board module support"
select SND_FIREWIRE_LIB
select SND_RAWMIDI
+ select SND_PCM
help
Say Y here to include support for FireWire devices based
on Echo Digital Audio Fireworks board:
diff --git a/sound/firewire/fireworks/Makefile b/sound/firewire/fireworks/Makefile
index a2cecc6..d7ebf83 100644
--- a/sound/firewire/fireworks/Makefile
+++ b/sound/firewire/fireworks/Makefile
@@ -1,4 +1,4 @@
snd-fireworks-objs := fireworks_transaction.o fireworks_command.o \
fireworks_stream.o fireworks_proc.o fireworks_midi.o \
- fireworks.o
+ fireworks_pcm.o fireworks.o
obj-m += snd-fireworks.o
diff --git a/sound/firewire/fireworks/fireworks.c b/sound/firewire/fireworks/fireworks.c
index 85dbad3..2d3d1ed 100644
--- a/sound/firewire/fireworks/fireworks.c
+++ b/sound/firewire/fireworks/fireworks.c
@@ -207,6 +207,10 @@ efw_probe(struct fw_unit *unit,
goto error;
}
+ err = snd_efw_create_pcm_devices(efw);
+ if (err < 0)
+ goto error;
+
err = snd_card_register(card);
if (err < 0)
goto error;
diff --git a/sound/firewire/fireworks/fireworks.h b/sound/firewire/fireworks/fireworks.h
index 0dfed97..11d42cc 100644
--- a/sound/firewire/fireworks/fireworks.h
+++ b/sound/firewire/fireworks/fireworks.h
@@ -23,6 +23,7 @@
#include <sound/pcm.h>
#include <sound/info.h>
#include <sound/rawmidi.h>
+#include <sound/pcm_params.h>
#include "../packets-buffer.h"
#include "../iso-resources.h"
@@ -192,6 +193,9 @@ void snd_efw_proc_init(struct snd_efw *efw);
int snd_efw_create_midi_devices(struct snd_efw *efw);
+int snd_efw_create_pcm_devices(struct snd_efw *efw);
+int snd_efw_get_multiplier_mode(unsigned int sampling_rate, unsigned int *mode);
+
#define SND_EFW_DEV_ENTRY(vendor, model) \
{ \
.match_flags = IEEE1394_MATCH_VENDOR_ID | \
diff --git a/sound/firewire/fireworks/fireworks_pcm.c b/sound/firewire/fireworks/fireworks_pcm.c
new file mode 100644
index 0000000..88c1d53
--- /dev/null
+++ b/sound/firewire/fireworks/fireworks_pcm.c
@@ -0,0 +1,468 @@
+/*
+ * fireworks_pcm.c - a part of driver for Fireworks based devices
+ *
+ * Copyright (c) 2009-2010 Clemens Ladisch
+ * Copyright (c) 2013 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 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 < sizeof(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,
+ struct snd_efw *efw, unsigned int *channels)
+{
+ 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, rate_bit;
+
+ for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
+ /* skip unsupported sampling rate */
+ rate_bit = snd_pcm_rate_to_rate_bit(freq_table[i]);
+ if (!(efw->supported_sampling_rate & rate_bit))
+ continue;
+
+ mode = get_multiplier_mode_with_index(i);
+ if (!snd_interval_test(c, 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,
+ struct snd_efw *efw, unsigned int *channels)
+{
+ 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, rate_bit;
+
+ for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
+ /* skip unsupported sampling rate */
+ rate_bit = snd_pcm_rate_to_rate_bit(freq_table[i]);
+ if (!(efw->supported_sampling_rate & rate_bit))
+ continue;
+
+ mode = get_multiplier_mode_with_index(i);
+ if (!snd_interval_test(r, freq_table[i]))
+ continue;
+
+ t.min = min(t.min, channels[mode]);
+ t.max = max(t.max, channels[mode]);
+
+ }
+
+ return snd_interval_refine(c, &t);
+}
+
+static inline int
+hw_rule_capture_rate(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct snd_efw *efw = rule->private;
+ return hw_rule_rate(params, rule, efw,
+ efw->pcm_capture_channels);
+}
+
+static inline int
+hw_rule_playback_rate(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct snd_efw *efw = rule->private;
+ return hw_rule_rate(params, rule, efw,
+ efw->pcm_playback_channels);
+}
+
+static inline int
+hw_rule_capture_channels(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct snd_efw *efw = rule->private;
+ return hw_rule_channels(params, rule, efw,
+ efw->pcm_capture_channels);
+}
+
+static inline int
+hw_rule_playback_channels(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct snd_efw *efw = rule->private;
+ return hw_rule_channels(params, rule, efw,
+ efw->pcm_playback_channels);
+}
+
+static int
+pcm_init_hw_params(struct snd_efw *efw,
+ struct snd_pcm_substream *substream)
+{
+ unsigned int i, *pcm_channels, rate_bit, mode;
+ int err;
+
+ struct snd_pcm_hardware hardware = {
+ .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,
+ .rates = efw->supported_sampling_rate,
+ /* set up later */
+ .rate_min = UINT_MAX,
+ .rate_max = 0,
+ /* set up later */
+ .channels_min = UINT_MAX,
+ .channels_max = 0,
+ .buffer_bytes_max = 4 * 34 * 2048 * 2,
+ .period_bytes_min = 1,
+ .period_bytes_max = 4 * 34 * 2048,
+ .periods_min = 2,
+ .periods_max = UINT_MAX,
+ };
+
+ substream->runtime->hw = hardware;
+
+ /* add rule between channels and sampling rate */
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+ substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
+ snd_pcm_hw_rule_add(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_CHANNELS,
+ hw_rule_capture_channels, efw,
+ SNDRV_PCM_HW_PARAM_RATE, -1);
+ snd_pcm_hw_rule_add(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ hw_rule_capture_rate, efw,
+ SNDRV_PCM_HW_PARAM_CHANNELS, -1);
+ pcm_channels = efw->pcm_capture_channels;
+ } else {
+ substream->runtime->hw.formats = AMDTP_OUT_PCM_FORMAT_BITS;
+ snd_pcm_hw_rule_add(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_CHANNELS,
+ hw_rule_playback_channels, efw,
+ SNDRV_PCM_HW_PARAM_RATE, -1);
+ snd_pcm_hw_rule_add(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ hw_rule_playback_rate, efw,
+ SNDRV_PCM_HW_PARAM_CHANNELS, -1);
+ pcm_channels = efw->pcm_playback_channels;
+ }
+
+ /* limitation for min/max sampling rate */
+ snd_pcm_limit_hw_rates(substream->runtime);
+
+ /* limitation for the number of channels */
+ for (i = 0; i < ARRAY_SIZE(freq_table); i++) {
+ /* skip unsupported sampling rate */
+ rate_bit = snd_pcm_rate_to_rate_bit(freq_table[i]);
+ if (!(efw->supported_sampling_rate & rate_bit))
+ continue;
+
+ mode = get_multiplier_mode_with_index(i);
+ if (pcm_channels[mode] == 0)
+ continue;
+ substream->runtime->hw.channels_min =
+ min(substream->runtime->hw.channels_min,
+ pcm_channels[mode]);
+ substream->runtime->hw.channels_max =
+ max(substream->runtime->hw.channels_max,
+ pcm_channels[mode]);
+ }
+
+ /* AM824 in IEC 61883-6 can deliver 24bit data */
+ err = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 32, 24);
+ if (err < 0)
+ goto end;
+
+ /*
+ * AMDTP functionality in firewire-lib require periods to be aligned to
+ * 16 bit, or 24bit inner 32bit.
+ */
+ err = snd_pcm_hw_constraint_step(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
+ if (err < 0)
+ goto end;
+ err = snd_pcm_hw_constraint_step(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
+ if (err < 0)
+ goto end;
+
+ /*
+ * Currently INTERRUPT_INTERVAL in amdtp.c is 16.
+ * So snd_pcm_period_elapsed() can be called every 2m sec.
+ */
+ err = snd_pcm_hw_constraint_minmax(substream->runtime,
+ SNDRV_PCM_HW_PARAM_PERIOD_TIME,
+ 2000, UINT_MAX);
+end:
+ return err;
+}
+
+static int pcm_open(struct snd_pcm_substream *substream)
+{
+ struct snd_efw *efw = substream->private_data;
+ int sampling_rate;
+ unsigned int clock_source;
+ int err;
+
+ err = pcm_init_hw_params(efw, substream);
+ if (err < 0)
+ goto end;
+
+ err = snd_efw_command_get_clock_source(efw, &clock_source);
+ if (err < 0)
+ goto end;
+
+ /*
+ * 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 end;
+ substream->runtime->hw.rate_min = sampling_rate;
+ substream->runtime->hw.rate_max = sampling_rate;
+ }
+
+ snd_pcm_set_sync(substream);
+end:
+ return err;
+}
+
+static int pcm_close(struct snd_pcm_substream *substream)
+{
+ 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;
+
+ if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
+ efw->capture_substreams++;
+ amdtp_stream_set_pcm_format(&efw->tx_stream, params_format(hw_params));
+
+ return snd_pcm_lib_alloc_vmalloc_buffer(substream,
+ params_buffer_bytes(hw_params));
+}
+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;
+
+ if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
+ efw->playback_substreams++;
+ amdtp_stream_set_pcm_format(&efw->rx_stream, params_format(hw_params));
+
+ return snd_pcm_lib_alloc_vmalloc_buffer(substream,
+ params_buffer_bytes(hw_params));
+}
+
+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)
+ efw->capture_substreams--;
+
+ 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)
+ efw->playback_substreams--;
+
+ 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, &efw->tx_stream, 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, &efw->rx_stream, 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);
+}
+
+static const struct snd_pcm_ops pcm_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 pcm_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,
+};
+
+int snd_efw_create_pcm_devices(struct snd_efw *efw)
+{
+ 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, &pcm_playback_ops);
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops);
+end:
+ return err;
+}
+
diff --git a/sound/firewire/fireworks/fireworks_stream.c b/sound/firewire/fireworks/fireworks_stream.c
index f41aee4..7ff4406 100644
--- a/sound/firewire/fireworks/fireworks_stream.c
+++ b/sound/firewire/fireworks/fireworks_stream.c
@@ -9,39 +9,6 @@
#define CALLBACK_TIMEOUT 100
-static 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 < sizeof(freq_table); i++) {
- if (freq_table[i] == sampling_rate) {
- *mode = get_multiplier_mode_with_index(i);
- return 0;
- }
- }
-
- return -EINVAL;
-}
-
static int
init_stream(struct snd_efw *efw, struct amdtp_stream *stream)
{
--
1.8.3.2
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