--- /dev/null
+/*
+ * bebob_stream.c - a part of driver for BeBoB based devices
+ *
+ * Copyright (c) 2013-2014 Takashi Sakamoto
+ *
+ * Licensed under the terms of the GNU General Public License, version 2.
+ */
+
+#include "./bebob.h"
+
+#define CALLBACK_TIMEOUT 1000
+#define FW_ISO_RESOURCE_DELAY 1000
+
+/*
+ * NOTE;
+ * For BeBoB streams, Both of input and output CMP connection are important.
+ *
+ * For most devices, each CMP connection starts to transmit/receive a
+ * corresponding stream. But for a few devices, both of CMP connection needs
+ * to start transmitting stream. An example is 'M-Audio Firewire 410'.
+ */
+
+/* 128 is an arbitrary length but it seems to be enough */
+#define FORMAT_MAXIMUM_LENGTH 128
+
+const unsigned int snd_bebob_rate_table[SND_BEBOB_STRM_FMT_ENTRIES] = {
+ [0] = 32000,
+ [1] = 44100,
+ [2] = 48000,
+ [3] = 88200,
+ [4] = 96000,
+ [5] = 176400,
+ [6] = 192000,
+};
+
+/*
+ * See: Table 51: Extended Stream Format Info ‘Sampling Frequency’
+ * in Additional AVC commands (Nov 2003, BridgeCo)
+ */
+static const unsigned int bridgeco_freq_table[] = {
+ [0] = 0x02,
+ [1] = 0x03,
+ [2] = 0x04,
+ [3] = 0x0a,
+ [4] = 0x05,
+ [5] = 0x06,
+ [6] = 0x07,
+};
+
+static unsigned int
+get_formation_index(unsigned int rate)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(snd_bebob_rate_table); i++) {
+ if (snd_bebob_rate_table[i] == rate)
+ return i;
+ }
+ return -EINVAL;
+}
+
+int
+snd_bebob_stream_get_rate(struct snd_bebob *bebob, unsigned int *curr_rate)
+{
+ unsigned int tx_rate, rx_rate, trials;
+ int err;
+
+ trials = 0;
+ do {
+ err = avc_general_get_sig_fmt(bebob->unit, &tx_rate,
+ AVC_GENERAL_PLUG_DIR_OUT, 0);
+ } while (err == -EAGAIN && ++trials < 3);
+ if (err < 0)
+ goto end;
+
+ trials = 0;
+ do {
+ err = avc_general_get_sig_fmt(bebob->unit, &rx_rate,
+ AVC_GENERAL_PLUG_DIR_IN, 0);
+ } while (err == -EAGAIN && ++trials < 3);
+ if (err < 0)
+ goto end;
+
+ *curr_rate = rx_rate;
+ if (rx_rate == tx_rate)
+ goto end;
+
+ /* synchronize receive stream rate to transmit stream rate */
+ err = avc_general_set_sig_fmt(bebob->unit, rx_rate,
+ AVC_GENERAL_PLUG_DIR_IN, 0);
+end:
+ return err;
+}
+
+int
+snd_bebob_stream_set_rate(struct snd_bebob *bebob, unsigned int rate)
+{
+ int err;
+
+ err = avc_general_set_sig_fmt(bebob->unit, rate,
+ AVC_GENERAL_PLUG_DIR_OUT, 0);
+ if (err < 0)
+ goto end;
+
+ err = avc_general_set_sig_fmt(bebob->unit, rate,
+ AVC_GENERAL_PLUG_DIR_IN, 0);
+ if (err < 0)
+ goto end;
+
+ /*
+ * Some devices need a bit time for transition.
+ * 300msec is got by some experiments.
+ */
+ msleep(300);
+end:
+ return err;
+}
+
+int
+snd_bebob_stream_check_internal_clock(struct snd_bebob *bebob, bool *internal)
+{
+ struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock;
+ u8 addr[AVC_BRIDGECO_ADDR_BYTES], input[7];
+ unsigned int id;
+ int err = 0;
+
+ *internal = false;
+
+ /* 1.The device has its own operation to switch source of clock */
+ if (clk_spec) {
+ err = clk_spec->get(bebob, &id);
+ if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to get clock source: %d\n", err);
+ goto end;
+ }
+
+ if (id >= clk_spec->num) {
+ dev_err(&bebob->unit->device,
+ "clock source %d out of range 0..%d\n",
+ id, clk_spec->num - 1);
+ err = -EIO;
+ goto end;
+ }
+
+ if (strncmp(clk_spec->labels[id], SND_BEBOB_CLOCK_INTERNAL,
+ strlen(SND_BEBOB_CLOCK_INTERNAL)) == 0)
+ *internal = true;
+
+ goto end;
+ }
+
+ /*
+ * 2.The device don't support to switch source of clock then assumed
+ * to use internal clock always
+ */
+ if (bebob->sync_input_plug < 0) {
+ *internal = true;
+ goto end;
+ }
+
+ /*
+ * 3.The device supports to switch source of clock by an usual way.
+ * Let's check input for 'Music Sub Unit Sync Input' plug.
+ */
+ avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN,
+ bebob->sync_input_plug);
+ err = avc_bridgeco_get_plug_input(bebob->unit, addr, input);
+ if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to get an input for MSU in plug %d: %d\n",
+ bebob->sync_input_plug, err);
+ goto end;
+ }
+
+ /*
+ * If there are no input plugs, all of fields are 0xff.
+ * Here check the first field. This field is used for direction.
+ */
+ if (input[0] == 0xff) {
+ *internal = true;
+ goto end;
+ }
+
+ /*
+ * If source of clock is internal CSR, Music Sub Unit Sync Input is
+ * a destination of Music Sub Unit Sync Output.
+ */
+ *internal = ((input[0] == AVC_BRIDGECO_PLUG_DIR_OUT) &&
+ (input[1] == AVC_BRIDGECO_PLUG_MODE_SUBUNIT) &&
+ (input[2] == 0x0c) &&
+ (input[3] == 0x00));
+end:
+ return err;
+}
+
+static unsigned int
+map_data_channels(struct snd_bebob *bebob, struct amdtp_stream *s)
+{
+ unsigned int sec, sections, ch, channels;
+ unsigned int pcm, midi, location;
+ unsigned int stm_pos, sec_loc, pos;
+ u8 *buf, addr[AVC_BRIDGECO_ADDR_BYTES], type;
+ enum avc_bridgeco_plug_dir dir;
+ int err;
+
+ /*
+ * The length of return value of this command cannot be expected. Here
+ * use the maximum length of FCP.
+ */
+ buf = kzalloc(256, GFP_KERNEL);
+ if (buf == NULL)
+ return -ENOMEM;
+
+ if (s == &bebob->tx_stream)
+ dir = AVC_BRIDGECO_PLUG_DIR_OUT;
+ else
+ dir = AVC_BRIDGECO_PLUG_DIR_IN;
+
+ avc_bridgeco_fill_unit_addr(addr, dir, AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
+ err = avc_bridgeco_get_plug_ch_pos(bebob->unit, addr, buf, 256);
+ if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to get channel position for isoc %s plug 0: %d\n",
+ (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : "out",
+ err);
+ goto end;
+ }
+ pos = 0;
+
+ /* positions in I/O buffer */
+ pcm = 0;
+ midi = 0;
+
+ /* the number of sections in AMDTP packet */
+ sections = buf[pos++];
+
+ for (sec = 0; sec < sections; sec++) {
+ /* type of this section */
+ avc_bridgeco_fill_unit_addr(addr, dir,
+ AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
+ err = avc_bridgeco_get_plug_section_type(bebob->unit, addr,
+ sec, &type);
+ if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to get section type for isoc %s plug 0: %d\n",
+ (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" :
+ "out",
+ err);
+ goto end;
+ }
+ /* NoType */
+ if (type == 0xff) {
+ err = -ENOSYS;
+ goto end;
+ }
+
+ /* the number of channels in this section */
+ channels = buf[pos++];
+
+ for (ch = 0; ch < channels; ch++) {
+ /* position of this channel in AMDTP packet */
+ stm_pos = buf[pos++] - 1;
+ /* location of this channel in this section */
+ sec_loc = buf[pos++] - 1;
+
+ /*
+ * Basically the number of location is within the
+ * number of channels in this section. But some models
+ * of M-Audio don't follow this. Its location for MIDI
+ * is the position of MIDI channels in AMDTP packet.
+ */
+ if (sec_loc >= channels)
+ sec_loc = ch;
+
+ switch (type) {
+ /* for MIDI conformant data channel */
+ case 0x0a:
+ /* AMDTP_MAX_CHANNELS_FOR_MIDI is 1. */
+ if ((midi > 0) && (stm_pos != midi)) {
+ err = -ENOSYS;
+ goto end;
+ }
+ s->midi_position = stm_pos;
+ midi = stm_pos;
+ break;
+ /* for PCM data channel */
+ case 0x01: /* Headphone */
+ case 0x02: /* Microphone */
+ case 0x03: /* Line */
+ case 0x04: /* SPDIF */
+ case 0x05: /* ADAT */
+ case 0x06: /* TDIF */
+ case 0x07: /* MADI */
+ /* for undefined/changeable signal */
+ case 0x08: /* Analog */
+ case 0x09: /* Digital */
+ default:
+ location = pcm + sec_loc;
+ if (location >= AMDTP_MAX_CHANNELS_FOR_PCM) {
+ err = -ENOSYS;
+ goto end;
+ }
+ s->pcm_positions[location] = stm_pos;
+ break;
+ }
+ }
+
+ if (type != 0x0a)
+ pcm += channels;
+ else
+ midi += channels;
+ }
+end:
+ kfree(buf);
+ return err;
+}
+
+static int
+init_both_connections(struct snd_bebob *bebob)
+{
+ int err;
+
+ err = cmp_connection_init(&bebob->in_conn,
+ bebob->unit, CMP_INPUT, 0);
+ if (err < 0)
+ goto end;
+
+ err = cmp_connection_init(&bebob->out_conn,
+ bebob->unit, CMP_OUTPUT, 0);
+ if (err < 0)
+ cmp_connection_destroy(&bebob->in_conn);
+end:
+ return err;
+}
+
+static int
+check_connection_used_by_others(struct snd_bebob *bebob, struct amdtp_stream *s)
+{
+ struct cmp_connection *conn;
+ bool used;
+ int err;
+
+ if (s == &bebob->tx_stream)
+ conn = &bebob->out_conn;
+ else
+ conn = &bebob->in_conn;
+
+ err = cmp_connection_check_used(conn, &used);
+ if ((err >= 0) && used && !amdtp_stream_running(s)) {
+ dev_err(&bebob->unit->device,
+ "Connection established by others: %cPCR[%d]\n",
+ (conn->direction == CMP_OUTPUT) ? 'o' : 'i',
+ conn->pcr_index);
+ err = -EBUSY;
+ }
+
+ return err;
+}
+
+static int
+make_both_connections(struct snd_bebob *bebob, unsigned int rate)
+{
+ int index, pcm_channels, midi_channels, err = 0;
+
+ if (bebob->connected)
+ goto end;
+
+ /* confirm params for both streams */
+ index = get_formation_index(rate);
+ pcm_channels = bebob->tx_stream_formations[index].pcm;
+ midi_channels = bebob->tx_stream_formations[index].midi;
+ amdtp_stream_set_parameters(&bebob->tx_stream,
+ rate, pcm_channels, midi_channels * 8);
+ pcm_channels = bebob->rx_stream_formations[index].pcm;
+ midi_channels = bebob->rx_stream_formations[index].midi;
+ amdtp_stream_set_parameters(&bebob->rx_stream,
+ rate, pcm_channels, midi_channels * 8);
+
+ /* establish connections for both streams */
+ err = cmp_connection_establish(&bebob->out_conn,
+ amdtp_stream_get_max_payload(&bebob->tx_stream));
+ if (err < 0)
+ goto end;
+ err = cmp_connection_establish(&bebob->in_conn,
+ amdtp_stream_get_max_payload(&bebob->rx_stream));
+ if (err < 0) {
+ cmp_connection_break(&bebob->out_conn);
+ goto end;
+ }
+
+ bebob->connected = true;
+end:
+ return err;
+}
+
+static void
+break_both_connections(struct snd_bebob *bebob)
+{
+ cmp_connection_break(&bebob->in_conn);
+ cmp_connection_break(&bebob->out_conn);
+
+ bebob->connected = false;
+
+ /* These models seems to be in transition state for a longer time. */
+ if (bebob->maudio_special_quirk != NULL)
+ msleep(200);
+}
+
+static void
+destroy_both_connections(struct snd_bebob *bebob)
+{
+ cmp_connection_destroy(&bebob->in_conn);
+ cmp_connection_destroy(&bebob->out_conn);
+}
+
+static int
+get_sync_mode(struct snd_bebob *bebob, enum cip_flags *sync_mode)
+{
+ /* currently this module doesn't support SYT-Match mode */
+ *sync_mode = CIP_SYNC_TO_DEVICE;
+ return 0;
+}
+
+static int
+start_stream(struct snd_bebob *bebob, struct amdtp_stream *stream,
+ unsigned int rate)
+{
+ struct cmp_connection *conn;
+ int err = 0;
+
+ if (stream == &bebob->rx_stream)
+ conn = &bebob->in_conn;
+ else
+ conn = &bebob->out_conn;
+
+ /* channel mapping */
+ if (bebob->maudio_special_quirk == NULL) {
+ err = map_data_channels(bebob, stream);
+ if (err < 0)
+ goto end;
+ }
+
+ /* start amdtp stream */
+ err = amdtp_stream_start(stream,
+ conn->resources.channel,
+ conn->speed);
+end:
+ return err;
+}
+
+int snd_bebob_stream_init_duplex(struct snd_bebob *bebob)
+{
+ int err;
+
+ err = init_both_connections(bebob);
+ if (err < 0)
+ goto end;
+
+ err = amdtp_stream_init(&bebob->tx_stream, bebob->unit,
+ AMDTP_IN_STREAM, CIP_BLOCKING);
+ if (err < 0) {
+ amdtp_stream_destroy(&bebob->tx_stream);
+ destroy_both_connections(bebob);
+ goto end;
+ }
+ /* See comments in next function */
+ init_completion(&bebob->bus_reset);
+ bebob->tx_stream.flags |= CIP_SKIP_INIT_DBC_CHECK;
+ /*
+ * At high sampling rate, M-Audio special firmware transmits empty
+ * packet with the value of dbc incremented by 8 but the others are
+ * valid to IEC 61883-1.
+ */
+ if (bebob->maudio_special_quirk)
+ bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC;
+
+ err = amdtp_stream_init(&bebob->rx_stream, bebob->unit,
+ AMDTP_OUT_STREAM, CIP_BLOCKING);
+ if (err < 0) {
+ amdtp_stream_destroy(&bebob->tx_stream);
+ amdtp_stream_destroy(&bebob->rx_stream);
+ destroy_both_connections(bebob);
+ }
+end:
+ return err;
+}
+
+int snd_bebob_stream_start_duplex(struct snd_bebob *bebob, unsigned int rate)
+{
+ struct snd_bebob_rate_spec *rate_spec = bebob->spec->rate;
+ struct amdtp_stream *master, *slave;
+ atomic_t *slave_substreams;
+ enum cip_flags sync_mode;
+ unsigned int curr_rate;
+ bool updated = false;
+ int err = 0;
+
+ /*
+ * Normal BeBoB firmware has a quirk at bus reset to transmits packets
+ * with discontinuous value in dbc field.
+ *
+ * This 'struct completion' is used to call .update() at first to update
+ * connections/streams. Next following codes handle streaming error.
+ */
+ if (amdtp_streaming_error(&bebob->tx_stream)) {
+ if (completion_done(&bebob->bus_reset))
+ reinit_completion(&bebob->bus_reset);
+
+ updated = (wait_for_completion_interruptible_timeout(
+ &bebob->bus_reset,
+ msecs_to_jiffies(FW_ISO_RESOURCE_DELAY)) > 0);
+ }
+
+ mutex_lock(&bebob->mutex);
+
+ /* Need no substreams */
+ if (atomic_read(&bebob->playback_substreams) == 0 &&
+ atomic_read(&bebob->capture_substreams) == 0)
+ goto end;
+
+ err = get_sync_mode(bebob, &sync_mode);
+ if (err < 0)
+ goto end;
+ if (sync_mode == CIP_SYNC_TO_DEVICE) {
+ master = &bebob->tx_stream;
+ slave = &bebob->rx_stream;
+ slave_substreams = &bebob->playback_substreams;
+ } else {
+ master = &bebob->rx_stream;
+ slave = &bebob->tx_stream;
+ slave_substreams = &bebob->capture_substreams;
+ }
+
+ /*
+ * Considering JACK/FFADO streaming:
+ * TODO: This can be removed hwdep functionality becomes popular.
+ */
+ err = check_connection_used_by_others(bebob, master);
+ if (err < 0)
+ goto end;
+
+ /*
+ * packet queueing error or detecting discontinuity
+ *
+ * At bus reset, connections should not be broken here. So streams need
+ * to be re-started. This is a reason to use SKIP_INIT_DBC_CHECK flag.
+ */
+ if (amdtp_streaming_error(master))
+ amdtp_stream_stop(master);
+ if (amdtp_streaming_error(slave))
+ amdtp_stream_stop(slave);
+ if (!updated &&
+ !amdtp_stream_running(master) && !amdtp_stream_running(slave))
+ break_both_connections(bebob);
+
+ /* stop streams if rate is different */
+ err = rate_spec->get(bebob, &curr_rate);
+ if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to get sampling rate: %d\n", err);
+ goto end;
+ }
+ if (rate == 0)
+ rate = curr_rate;
+ if (rate != curr_rate) {
+ amdtp_stream_stop(master);
+ amdtp_stream_stop(slave);
+ break_both_connections(bebob);
+ }
+
+ /* master should be always running */
+ if (!amdtp_stream_running(master)) {
+ amdtp_stream_set_sync(sync_mode, master, slave);
+ bebob->master = master;
+
+ /*
+ * NOTE:
+ * If establishing connections at first, Yamaha GO46
+ * (and maybe Terratec X24) don't generate sound.
+ *
+ * For firmware customized by M-Audio, refer to next NOTE.
+ */
+ if (bebob->maudio_special_quirk == NULL) {
+ err = rate_spec->set(bebob, rate);
+ if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to set sampling rate: %d\n",
+ err);
+ goto end;
+ }
+ }
+
+ err = make_both_connections(bebob, rate);
+ if (err < 0)
+ goto end;
+
+ err = start_stream(bebob, master, rate);
+ if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to run AMDTP master stream:%d\n", err);
+ break_both_connections(bebob);
+ goto end;
+ }
+
+ /*
+ * NOTE:
+ * The firmware customized by M-Audio uses these commands to
+ * start transmitting stream. This is not usual way.
+ */
+ if (bebob->maudio_special_quirk != NULL) {
+ err = rate_spec->set(bebob, rate);
+ if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to ensure sampling rate: %d\n",
+ err);
+ amdtp_stream_stop(master);
+ break_both_connections(bebob);
+ goto end;
+ }
+ }
+
+ /* wait first callback */
+ if (!amdtp_stream_wait_callback(master, CALLBACK_TIMEOUT)) {
+ amdtp_stream_stop(master);
+ break_both_connections(bebob);
+ err = -ETIMEDOUT;
+ goto end;
+ }
+ }
+
+ /* start slave if needed */
+ if (atomic_read(slave_substreams) > 0 && !amdtp_stream_running(slave)) {
+ err = start_stream(bebob, slave, rate);
+ if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to run AMDTP slave stream:%d\n", err);
+ amdtp_stream_stop(master);
+ break_both_connections(bebob);
+ goto end;
+ }
+
+ /* wait first callback */
+ if (!amdtp_stream_wait_callback(slave, CALLBACK_TIMEOUT)) {
+ amdtp_stream_stop(slave);
+ amdtp_stream_stop(master);
+ break_both_connections(bebob);
+ err = -ETIMEDOUT;
+ }
+ }
+end:
+ mutex_unlock(&bebob->mutex);
+ return err;
+}
+
+void snd_bebob_stream_stop_duplex(struct snd_bebob *bebob)
+{
+ struct amdtp_stream *master, *slave;
+ atomic_t *master_substreams, *slave_substreams;
+
+ if (bebob->master == &bebob->rx_stream) {
+ slave = &bebob->tx_stream;
+ master = &bebob->rx_stream;
+ slave_substreams = &bebob->capture_substreams;
+ master_substreams = &bebob->playback_substreams;
+ } else {
+ slave = &bebob->rx_stream;
+ master = &bebob->tx_stream;
+ slave_substreams = &bebob->playback_substreams;
+ master_substreams = &bebob->capture_substreams;
+ }
+
+ mutex_lock(&bebob->mutex);
+
+ if (atomic_read(slave_substreams) == 0) {
+ amdtp_stream_pcm_abort(slave);
+ amdtp_stream_stop(slave);
+
+ if (atomic_read(master_substreams) == 0) {
+ amdtp_stream_pcm_abort(master);
+ amdtp_stream_stop(master);
+ break_both_connections(bebob);
+ }
+ }
+
+ mutex_unlock(&bebob->mutex);
+}
+
+void snd_bebob_stream_update_duplex(struct snd_bebob *bebob)
+{
+ /* vs. XRUN recovery due to discontinuity at bus reset */
+ mutex_lock(&bebob->mutex);
+
+ if ((cmp_connection_update(&bebob->in_conn) < 0) ||
+ (cmp_connection_update(&bebob->out_conn) < 0)) {
+ amdtp_stream_pcm_abort(&bebob->rx_stream);
+ amdtp_stream_pcm_abort(&bebob->tx_stream);
+ amdtp_stream_stop(&bebob->rx_stream);
+ amdtp_stream_stop(&bebob->tx_stream);
+ break_both_connections(bebob);
+ } else {
+ amdtp_stream_update(&bebob->rx_stream);
+ amdtp_stream_update(&bebob->tx_stream);
+ }
+
+ /* wake up stream_start_duplex() */
+ if (!completion_done(&bebob->bus_reset))
+ complete_all(&bebob->bus_reset);
+
+ mutex_unlock(&bebob->mutex);
+}
+
+/*
+ * This function should be called before starting streams or after stopping
+ * streams.
+ */
+void snd_bebob_stream_destroy_duplex(struct snd_bebob *bebob)
+{
+ amdtp_stream_destroy(&bebob->rx_stream);
+ amdtp_stream_destroy(&bebob->tx_stream);
+
+ destroy_both_connections(bebob);
+}
+
+/*
+ * See: Table 50: Extended Stream Format Info Format Hierarchy Level 2’
+ * in Additional AVC commands (Nov 2003, BridgeCo)
+ * Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005
+ */
+static int
+parse_stream_formation(u8 *buf, unsigned int len,
+ struct snd_bebob_stream_formation *formation)
+{
+ unsigned int i, e, channels, format;
+
+ /*
+ * this module can support a hierarchy combination that:
+ * Root: Audio and Music (0x90)
+ * Level 1: AM824 Compound (0x40)
+ */
+ if ((buf[0] != 0x90) || (buf[1] != 0x40))
+ return -ENOSYS;
+
+ /* check sampling rate */
+ for (i = 0; i < ARRAY_SIZE(bridgeco_freq_table); i++) {
+ if (buf[2] == bridgeco_freq_table[i])
+ break;
+ }
+ if (i == ARRAY_SIZE(bridgeco_freq_table))
+ return -ENOSYS;
+
+ /* Avoid double count by different entries for the same rate. */
+ memset(&formation[i], 0, sizeof(struct snd_bebob_stream_formation));
+
+ for (e = 0; e < buf[4]; e++) {
+ channels = buf[5 + e * 2];
+ format = buf[6 + e * 2];
+
+ switch (format) {
+ /* IEC 60958 Conformant, currently handled as MBLA */
+ case 0x00:
+ /* Multi bit linear audio */
+ case 0x06: /* Raw */
+ formation[i].pcm += channels;
+ break;
+ /* MIDI Conformant */
+ case 0x0d:
+ formation[i].midi += channels;
+ break;
+ /* IEC 61937-3 to 7 */
+ case 0x01:
+ case 0x02:
+ case 0x03:
+ case 0x04:
+ case 0x05:
+ /* Multi bit linear audio */
+ case 0x07: /* DVD-Audio */
+ case 0x0c: /* High Precision */
+ /* One Bit Audio */
+ case 0x08: /* (Plain) Raw */
+ case 0x09: /* (Plain) SACD */
+ case 0x0a: /* (Encoded) Raw */
+ case 0x0b: /* (Encoded) SACD */
+ /* Synchronization Stream (Stereo Raw audio) */
+ case 0x40:
+ /* Don't care */
+ case 0xff:
+ default:
+ return -ENOSYS; /* not supported */
+ }
+ }
+
+ if (formation[i].pcm > AMDTP_MAX_CHANNELS_FOR_PCM ||
+ formation[i].midi > AMDTP_MAX_CHANNELS_FOR_MIDI)
+ return -ENOSYS;
+
+ return 0;
+}
+
+static int
+fill_stream_formations(struct snd_bebob *bebob, enum avc_bridgeco_plug_dir dir,
+ unsigned short pid)
+{
+ u8 *buf;
+ struct snd_bebob_stream_formation *formations;
+ unsigned int len, eid;
+ u8 addr[AVC_BRIDGECO_ADDR_BYTES];
+ int err;
+
+ buf = kmalloc(FORMAT_MAXIMUM_LENGTH, GFP_KERNEL);
+ if (buf == NULL)
+ return -ENOMEM;
+
+ if (dir == AVC_BRIDGECO_PLUG_DIR_IN)
+ formations = bebob->rx_stream_formations;
+ else
+ formations = bebob->tx_stream_formations;
+
+ for (eid = 0; eid < SND_BEBOB_STRM_FMT_ENTRIES; eid++) {
+ len = FORMAT_MAXIMUM_LENGTH;
+ avc_bridgeco_fill_unit_addr(addr, dir,
+ AVC_BRIDGECO_PLUG_UNIT_ISOC, pid);
+ err = avc_bridgeco_get_plug_strm_fmt(bebob->unit, addr, buf,
+ &len, eid);
+ /* No entries remained. */
+ if (err == -EINVAL && eid > 0) {
+ err = 0;
+ break;
+ } else if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to get stream format %d for isoc %s plug %d:%d\n",
+ eid,
+ (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" :
+ "out",
+ pid, err);
+ break;
+ }
+
+ err = parse_stream_formation(buf, len, formations);
+ if (err < 0)
+ break;
+ }
+
+ kfree(buf);
+ return err;
+}
+
+static int
+seek_msu_sync_input_plug(struct snd_bebob *bebob)
+{
+ u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES];
+ unsigned int i;
+ enum avc_bridgeco_plug_type type;
+ int err;
+
+ /* Get the number of Music Sub Unit for both direction. */
+ err = avc_general_get_plug_info(bebob->unit, 0x0c, 0x00, 0x00, plugs);
+ if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to get info for MSU in/out plugs: %d\n",
+ err);
+ goto end;
+ }
+
+ /* seek destination plugs for 'MSU sync input' */
+ bebob->sync_input_plug = -1;
+ for (i = 0; i < plugs[0]; i++) {
+ avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, i);
+ err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
+ if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to get type for MSU in plug %d: %d\n",
+ i, err);
+ goto end;
+ }
+
+ if (type == AVC_BRIDGECO_PLUG_TYPE_SYNC) {
+ bebob->sync_input_plug = i;
+ break;
+ }
+ }
+end:
+ return err;
+}
+
+int snd_bebob_stream_discover(struct snd_bebob *bebob)
+{
+ struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock;
+ u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES];
+ enum avc_bridgeco_plug_type type;
+ unsigned int i;
+ int err;
+
+ /* the number of plugs for isoc in/out, ext in/out */
+ err = avc_general_get_plug_info(bebob->unit, 0x1f, 0x07, 0x00, plugs);
+ if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to get info for isoc/external in/out plugs: %d\n",
+ err);
+ goto end;
+ }
+
+ /*
+ * This module supports at least one isoc input plug and one isoc
+ * output plug.
+ */
+ if ((plugs[0] == 0) || (plugs[1] == 0)) {
+ err = -ENOSYS;
+ goto end;
+ }
+
+ avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN,
+ AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
+ err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
+ if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to get type for isoc in plug 0: %d\n", err);
+ goto end;
+ } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) {
+ err = -ENOSYS;
+ goto end;
+ }
+ err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_IN, 0);
+ if (err < 0)
+ goto end;
+
+ avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT,
+ AVC_BRIDGECO_PLUG_UNIT_ISOC, 0);
+ err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
+ if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to get type for isoc out plug 0: %d\n", err);
+ goto end;
+ } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) {
+ err = -ENOSYS;
+ goto end;
+ }
+ err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_OUT, 0);
+ if (err < 0)
+ goto end;
+
+ /* count external input plugs for MIDI */
+ bebob->midi_input_ports = 0;
+ for (i = 0; i < plugs[2]; i++) {
+ avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN,
+ AVC_BRIDGECO_PLUG_UNIT_EXT, i);
+ err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
+ if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to get type for external in plug %d: %d\n",
+ i, err);
+ goto end;
+ } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) {
+ bebob->midi_input_ports++;
+ }
+ }
+
+ /* count external output plugs for MIDI */
+ bebob->midi_output_ports = 0;
+ for (i = 0; i < plugs[3]; i++) {
+ avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT,
+ AVC_BRIDGECO_PLUG_UNIT_EXT, i);
+ err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type);
+ if (err < 0) {
+ dev_err(&bebob->unit->device,
+ "fail to get type for external out plug %d: %d\n",
+ i, err);
+ goto end;
+ } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) {
+ bebob->midi_output_ports++;
+ }
+ }
+
+ /* for check source of clock later */
+ if (!clk_spec)
+ err = seek_msu_sync_input_plug(bebob);
+end:
+ return err;
+}
+
+void snd_bebob_stream_lock_changed(struct snd_bebob *bebob)
+{
+ bebob->dev_lock_changed = true;
+ wake_up(&bebob->hwdep_wait);
+}
+
+int snd_bebob_stream_lock_try(struct snd_bebob *bebob)
+{
+ int err;
+
+ spin_lock_irq(&bebob->lock);
+
+ /* user land lock this */
+ if (bebob->dev_lock_count < 0) {
+ err = -EBUSY;
+ goto end;
+ }
+
+ /* this is the first time */
+ if (bebob->dev_lock_count++ == 0)
+ snd_bebob_stream_lock_changed(bebob);
+ err = 0;
+end:
+ spin_unlock_irq(&bebob->lock);
+ return err;
+}
+
+void snd_bebob_stream_lock_release(struct snd_bebob *bebob)
+{
+ spin_lock_irq(&bebob->lock);
+
+ if (WARN_ON(bebob->dev_lock_count <= 0))
+ goto end;
+ if (--bebob->dev_lock_count == 0)
+ snd_bebob_stream_lock_changed(bebob);
+end:
+ spin_unlock_irq(&bebob->lock);
+}
Code Review / kvmfornfv.git / blobdiff