1eb7b3a05STakashi Sakamoto /* 2eb7b3a05STakashi Sakamoto * bebob_stream.c - a part of driver for BeBoB based devices 3eb7b3a05STakashi Sakamoto * 4eb7b3a05STakashi Sakamoto * Copyright (c) 2013-2014 Takashi Sakamoto 5eb7b3a05STakashi Sakamoto * 6eb7b3a05STakashi Sakamoto * Licensed under the terms of the GNU General Public License, version 2. 7eb7b3a05STakashi Sakamoto */ 8eb7b3a05STakashi Sakamoto 9eb7b3a05STakashi Sakamoto #include "./bebob.h" 10eb7b3a05STakashi Sakamoto 11eb7b3a05STakashi Sakamoto #define CALLBACK_TIMEOUT 1000 12b6bc8123STakashi Sakamoto #define FW_ISO_RESOURCE_DELAY 1000 13eb7b3a05STakashi Sakamoto 14eb7b3a05STakashi Sakamoto /* 15eb7b3a05STakashi Sakamoto * NOTE; 16eb7b3a05STakashi Sakamoto * For BeBoB streams, Both of input and output CMP connection are important. 17eb7b3a05STakashi Sakamoto * 18eb7b3a05STakashi Sakamoto * For most devices, each CMP connection starts to transmit/receive a 19eb7b3a05STakashi Sakamoto * corresponding stream. But for a few devices, both of CMP connection needs 20eb7b3a05STakashi Sakamoto * to start transmitting stream. An example is 'M-Audio Firewire 410'. 21eb7b3a05STakashi Sakamoto */ 22eb7b3a05STakashi Sakamoto 23eb7b3a05STakashi Sakamoto /* 128 is an arbitrary length but it seems to be enough */ 24eb7b3a05STakashi Sakamoto #define FORMAT_MAXIMUM_LENGTH 128 25eb7b3a05STakashi Sakamoto 26eb7b3a05STakashi Sakamoto const unsigned int snd_bebob_rate_table[SND_BEBOB_STRM_FMT_ENTRIES] = { 27eb7b3a05STakashi Sakamoto [0] = 32000, 28eb7b3a05STakashi Sakamoto [1] = 44100, 29eb7b3a05STakashi Sakamoto [2] = 48000, 30eb7b3a05STakashi Sakamoto [3] = 88200, 31eb7b3a05STakashi Sakamoto [4] = 96000, 32eb7b3a05STakashi Sakamoto [5] = 176400, 33eb7b3a05STakashi Sakamoto [6] = 192000, 34eb7b3a05STakashi Sakamoto }; 35eb7b3a05STakashi Sakamoto 36eb7b3a05STakashi Sakamoto /* 37eb7b3a05STakashi Sakamoto * See: Table 51: Extended Stream Format Info ‘Sampling Frequency’ 38eb7b3a05STakashi Sakamoto * in Additional AVC commands (Nov 2003, BridgeCo) 39eb7b3a05STakashi Sakamoto */ 40eb7b3a05STakashi Sakamoto static const unsigned int bridgeco_freq_table[] = { 41eb7b3a05STakashi Sakamoto [0] = 0x02, 42eb7b3a05STakashi Sakamoto [1] = 0x03, 43eb7b3a05STakashi Sakamoto [2] = 0x04, 44eb7b3a05STakashi Sakamoto [3] = 0x0a, 45eb7b3a05STakashi Sakamoto [4] = 0x05, 46eb7b3a05STakashi Sakamoto [5] = 0x06, 47eb7b3a05STakashi Sakamoto [6] = 0x07, 48eb7b3a05STakashi Sakamoto }; 49eb7b3a05STakashi Sakamoto 50eb7b3a05STakashi Sakamoto static unsigned int 51eb7b3a05STakashi Sakamoto get_formation_index(unsigned int rate) 52eb7b3a05STakashi Sakamoto { 53eb7b3a05STakashi Sakamoto unsigned int i; 54eb7b3a05STakashi Sakamoto 55eb7b3a05STakashi Sakamoto for (i = 0; i < ARRAY_SIZE(snd_bebob_rate_table); i++) { 56eb7b3a05STakashi Sakamoto if (snd_bebob_rate_table[i] == rate) 57eb7b3a05STakashi Sakamoto return i; 58eb7b3a05STakashi Sakamoto } 59eb7b3a05STakashi Sakamoto return -EINVAL; 60eb7b3a05STakashi Sakamoto } 61eb7b3a05STakashi Sakamoto 62eb7b3a05STakashi Sakamoto int 63eb7b3a05STakashi Sakamoto snd_bebob_stream_get_rate(struct snd_bebob *bebob, unsigned int *curr_rate) 64eb7b3a05STakashi Sakamoto { 65eb7b3a05STakashi Sakamoto unsigned int tx_rate, rx_rate, trials; 66eb7b3a05STakashi Sakamoto int err; 67eb7b3a05STakashi Sakamoto 68eb7b3a05STakashi Sakamoto trials = 0; 69eb7b3a05STakashi Sakamoto do { 70eb7b3a05STakashi Sakamoto err = avc_general_get_sig_fmt(bebob->unit, &tx_rate, 71eb7b3a05STakashi Sakamoto AVC_GENERAL_PLUG_DIR_OUT, 0); 72eb7b3a05STakashi Sakamoto } while (err == -EAGAIN && ++trials < 3); 73eb7b3a05STakashi Sakamoto if (err < 0) 74eb7b3a05STakashi Sakamoto goto end; 75eb7b3a05STakashi Sakamoto 76eb7b3a05STakashi Sakamoto trials = 0; 77eb7b3a05STakashi Sakamoto do { 78eb7b3a05STakashi Sakamoto err = avc_general_get_sig_fmt(bebob->unit, &rx_rate, 79eb7b3a05STakashi Sakamoto AVC_GENERAL_PLUG_DIR_IN, 0); 80eb7b3a05STakashi Sakamoto } while (err == -EAGAIN && ++trials < 3); 81eb7b3a05STakashi Sakamoto if (err < 0) 82eb7b3a05STakashi Sakamoto goto end; 83eb7b3a05STakashi Sakamoto 84eb7b3a05STakashi Sakamoto *curr_rate = rx_rate; 85eb7b3a05STakashi Sakamoto if (rx_rate == tx_rate) 86eb7b3a05STakashi Sakamoto goto end; 87eb7b3a05STakashi Sakamoto 88eb7b3a05STakashi Sakamoto /* synchronize receive stream rate to transmit stream rate */ 89eb7b3a05STakashi Sakamoto err = avc_general_set_sig_fmt(bebob->unit, rx_rate, 90eb7b3a05STakashi Sakamoto AVC_GENERAL_PLUG_DIR_IN, 0); 91eb7b3a05STakashi Sakamoto end: 92eb7b3a05STakashi Sakamoto return err; 93eb7b3a05STakashi Sakamoto } 94eb7b3a05STakashi Sakamoto 95eb7b3a05STakashi Sakamoto int 96eb7b3a05STakashi Sakamoto snd_bebob_stream_set_rate(struct snd_bebob *bebob, unsigned int rate) 97eb7b3a05STakashi Sakamoto { 98eb7b3a05STakashi Sakamoto int err; 99eb7b3a05STakashi Sakamoto 100eb7b3a05STakashi Sakamoto err = avc_general_set_sig_fmt(bebob->unit, rate, 101eb7b3a05STakashi Sakamoto AVC_GENERAL_PLUG_DIR_OUT, 0); 102eb7b3a05STakashi Sakamoto if (err < 0) 103eb7b3a05STakashi Sakamoto goto end; 104eb7b3a05STakashi Sakamoto 105eb7b3a05STakashi Sakamoto err = avc_general_set_sig_fmt(bebob->unit, rate, 106eb7b3a05STakashi Sakamoto AVC_GENERAL_PLUG_DIR_IN, 0); 107eb7b3a05STakashi Sakamoto if (err < 0) 108eb7b3a05STakashi Sakamoto goto end; 109eb7b3a05STakashi Sakamoto 110eb7b3a05STakashi Sakamoto /* 111eb7b3a05STakashi Sakamoto * Some devices need a bit time for transition. 112eb7b3a05STakashi Sakamoto * 300msec is got by some experiments. 113eb7b3a05STakashi Sakamoto */ 114eb7b3a05STakashi Sakamoto msleep(300); 115eb7b3a05STakashi Sakamoto end: 116eb7b3a05STakashi Sakamoto return err; 117eb7b3a05STakashi Sakamoto } 118eb7b3a05STakashi Sakamoto 119eb7b3a05STakashi Sakamoto int 120eb7b3a05STakashi Sakamoto snd_bebob_stream_check_internal_clock(struct snd_bebob *bebob, bool *internal) 121eb7b3a05STakashi Sakamoto { 1221fc9522aSTakashi Sakamoto struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock; 123eb7b3a05STakashi Sakamoto u8 addr[AVC_BRIDGECO_ADDR_BYTES], input[7]; 1241fc9522aSTakashi Sakamoto unsigned int id; 125eb7b3a05STakashi Sakamoto int err = 0; 126eb7b3a05STakashi Sakamoto 127eb7b3a05STakashi Sakamoto *internal = false; 128eb7b3a05STakashi Sakamoto 1291fc9522aSTakashi Sakamoto /* 1.The device has its own operation to switch source of clock */ 1301fc9522aSTakashi Sakamoto if (clk_spec) { 1311fc9522aSTakashi Sakamoto err = clk_spec->get(bebob, &id); 1321fc9522aSTakashi Sakamoto if (err < 0) 1331fc9522aSTakashi Sakamoto dev_err(&bebob->unit->device, 1341fc9522aSTakashi Sakamoto "fail to get clock source: %d\n", err); 1351fc9522aSTakashi Sakamoto else if (strncmp(clk_spec->labels[id], SND_BEBOB_CLOCK_INTERNAL, 1361fc9522aSTakashi Sakamoto strlen(SND_BEBOB_CLOCK_INTERNAL)) == 0) 1371fc9522aSTakashi Sakamoto *internal = true; 1381fc9522aSTakashi Sakamoto goto end; 1391fc9522aSTakashi Sakamoto } 1401fc9522aSTakashi Sakamoto 141eb7b3a05STakashi Sakamoto /* 1421fc9522aSTakashi Sakamoto * 2.The device don't support to switch source of clock then assumed 143eb7b3a05STakashi Sakamoto * to use internal clock always 144eb7b3a05STakashi Sakamoto */ 145eb7b3a05STakashi Sakamoto if (bebob->sync_input_plug < 0) { 146eb7b3a05STakashi Sakamoto *internal = true; 147eb7b3a05STakashi Sakamoto goto end; 148eb7b3a05STakashi Sakamoto } 149eb7b3a05STakashi Sakamoto 150eb7b3a05STakashi Sakamoto /* 1511fc9522aSTakashi Sakamoto * 3.The device supports to switch source of clock by an usual way. 152eb7b3a05STakashi Sakamoto * Let's check input for 'Music Sub Unit Sync Input' plug. 153eb7b3a05STakashi Sakamoto */ 154eb7b3a05STakashi Sakamoto avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, 155eb7b3a05STakashi Sakamoto bebob->sync_input_plug); 156eb7b3a05STakashi Sakamoto err = avc_bridgeco_get_plug_input(bebob->unit, addr, input); 157eb7b3a05STakashi Sakamoto if (err < 0) { 158eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 159eb7b3a05STakashi Sakamoto "fail to get an input for MSU in plug %d: %d\n", 160eb7b3a05STakashi Sakamoto bebob->sync_input_plug, err); 161eb7b3a05STakashi Sakamoto goto end; 162eb7b3a05STakashi Sakamoto } 163eb7b3a05STakashi Sakamoto 164eb7b3a05STakashi Sakamoto /* 165eb7b3a05STakashi Sakamoto * If there are no input plugs, all of fields are 0xff. 166eb7b3a05STakashi Sakamoto * Here check the first field. This field is used for direction. 167eb7b3a05STakashi Sakamoto */ 168eb7b3a05STakashi Sakamoto if (input[0] == 0xff) { 169eb7b3a05STakashi Sakamoto *internal = true; 170eb7b3a05STakashi Sakamoto goto end; 171eb7b3a05STakashi Sakamoto } 172eb7b3a05STakashi Sakamoto 173eb7b3a05STakashi Sakamoto /* 174eb7b3a05STakashi Sakamoto * If source of clock is internal CSR, Music Sub Unit Sync Input is 175eb7b3a05STakashi Sakamoto * a destination of Music Sub Unit Sync Output. 176eb7b3a05STakashi Sakamoto */ 177eb7b3a05STakashi Sakamoto *internal = ((input[0] == AVC_BRIDGECO_PLUG_DIR_OUT) && 178eb7b3a05STakashi Sakamoto (input[1] == AVC_BRIDGECO_PLUG_MODE_SUBUNIT) && 179eb7b3a05STakashi Sakamoto (input[2] == 0x0c) && 180eb7b3a05STakashi Sakamoto (input[3] == 0x00)); 181eb7b3a05STakashi Sakamoto end: 182eb7b3a05STakashi Sakamoto return err; 183eb7b3a05STakashi Sakamoto } 184eb7b3a05STakashi Sakamoto 185eb7b3a05STakashi Sakamoto static unsigned int 186eb7b3a05STakashi Sakamoto map_data_channels(struct snd_bebob *bebob, struct amdtp_stream *s) 187eb7b3a05STakashi Sakamoto { 188eb7b3a05STakashi Sakamoto unsigned int sec, sections, ch, channels; 189eb7b3a05STakashi Sakamoto unsigned int pcm, midi, location; 190eb7b3a05STakashi Sakamoto unsigned int stm_pos, sec_loc, pos; 191eb7b3a05STakashi Sakamoto u8 *buf, addr[AVC_BRIDGECO_ADDR_BYTES], type; 192eb7b3a05STakashi Sakamoto enum avc_bridgeco_plug_dir dir; 193eb7b3a05STakashi Sakamoto int err; 194eb7b3a05STakashi Sakamoto 195eb7b3a05STakashi Sakamoto /* 196eb7b3a05STakashi Sakamoto * The length of return value of this command cannot be expected. Here 197eb7b3a05STakashi Sakamoto * use the maximum length of FCP. 198eb7b3a05STakashi Sakamoto */ 199eb7b3a05STakashi Sakamoto buf = kzalloc(256, GFP_KERNEL); 200eb7b3a05STakashi Sakamoto if (buf == NULL) 201eb7b3a05STakashi Sakamoto return -ENOMEM; 202eb7b3a05STakashi Sakamoto 203eb7b3a05STakashi Sakamoto if (s == &bebob->tx_stream) 204eb7b3a05STakashi Sakamoto dir = AVC_BRIDGECO_PLUG_DIR_OUT; 205eb7b3a05STakashi Sakamoto else 206eb7b3a05STakashi Sakamoto dir = AVC_BRIDGECO_PLUG_DIR_IN; 207eb7b3a05STakashi Sakamoto 208eb7b3a05STakashi Sakamoto avc_bridgeco_fill_unit_addr(addr, dir, AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); 209eb7b3a05STakashi Sakamoto err = avc_bridgeco_get_plug_ch_pos(bebob->unit, addr, buf, 256); 210eb7b3a05STakashi Sakamoto if (err < 0) { 211eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 212eb7b3a05STakashi Sakamoto "fail to get channel position for isoc %s plug 0: %d\n", 213eb7b3a05STakashi Sakamoto (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : "out", 214eb7b3a05STakashi Sakamoto err); 215eb7b3a05STakashi Sakamoto goto end; 216eb7b3a05STakashi Sakamoto } 217eb7b3a05STakashi Sakamoto pos = 0; 218eb7b3a05STakashi Sakamoto 219eb7b3a05STakashi Sakamoto /* positions in I/O buffer */ 220eb7b3a05STakashi Sakamoto pcm = 0; 221eb7b3a05STakashi Sakamoto midi = 0; 222eb7b3a05STakashi Sakamoto 223eb7b3a05STakashi Sakamoto /* the number of sections in AMDTP packet */ 224eb7b3a05STakashi Sakamoto sections = buf[pos++]; 225eb7b3a05STakashi Sakamoto 226eb7b3a05STakashi Sakamoto for (sec = 0; sec < sections; sec++) { 227eb7b3a05STakashi Sakamoto /* type of this section */ 228eb7b3a05STakashi Sakamoto avc_bridgeco_fill_unit_addr(addr, dir, 229eb7b3a05STakashi Sakamoto AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); 230eb7b3a05STakashi Sakamoto err = avc_bridgeco_get_plug_section_type(bebob->unit, addr, 231eb7b3a05STakashi Sakamoto sec, &type); 232eb7b3a05STakashi Sakamoto if (err < 0) { 233eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 234eb7b3a05STakashi Sakamoto "fail to get section type for isoc %s plug 0: %d\n", 235eb7b3a05STakashi Sakamoto (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : 236eb7b3a05STakashi Sakamoto "out", 237eb7b3a05STakashi Sakamoto err); 238eb7b3a05STakashi Sakamoto goto end; 239eb7b3a05STakashi Sakamoto } 240eb7b3a05STakashi Sakamoto /* NoType */ 241eb7b3a05STakashi Sakamoto if (type == 0xff) { 242eb7b3a05STakashi Sakamoto err = -ENOSYS; 243eb7b3a05STakashi Sakamoto goto end; 244eb7b3a05STakashi Sakamoto } 245eb7b3a05STakashi Sakamoto 246eb7b3a05STakashi Sakamoto /* the number of channels in this section */ 247eb7b3a05STakashi Sakamoto channels = buf[pos++]; 248eb7b3a05STakashi Sakamoto 249eb7b3a05STakashi Sakamoto for (ch = 0; ch < channels; ch++) { 250eb7b3a05STakashi Sakamoto /* position of this channel in AMDTP packet */ 251eb7b3a05STakashi Sakamoto stm_pos = buf[pos++] - 1; 252eb7b3a05STakashi Sakamoto /* location of this channel in this section */ 253eb7b3a05STakashi Sakamoto sec_loc = buf[pos++] - 1; 254eb7b3a05STakashi Sakamoto 2559076c22dSTakashi Sakamoto /* 2569076c22dSTakashi Sakamoto * Basically the number of location is within the 2579076c22dSTakashi Sakamoto * number of channels in this section. But some models 2589076c22dSTakashi Sakamoto * of M-Audio don't follow this. Its location for MIDI 2599076c22dSTakashi Sakamoto * is the position of MIDI channels in AMDTP packet. 2609076c22dSTakashi Sakamoto */ 2619076c22dSTakashi Sakamoto if (sec_loc >= channels) 2629076c22dSTakashi Sakamoto sec_loc = ch; 2639076c22dSTakashi Sakamoto 264eb7b3a05STakashi Sakamoto switch (type) { 265eb7b3a05STakashi Sakamoto /* for MIDI conformant data channel */ 266eb7b3a05STakashi Sakamoto case 0x0a: 267eb7b3a05STakashi Sakamoto /* AMDTP_MAX_CHANNELS_FOR_MIDI is 1. */ 268eb7b3a05STakashi Sakamoto if ((midi > 0) && (stm_pos != midi)) { 269eb7b3a05STakashi Sakamoto err = -ENOSYS; 270eb7b3a05STakashi Sakamoto goto end; 271eb7b3a05STakashi Sakamoto } 272eb7b3a05STakashi Sakamoto s->midi_position = stm_pos; 273eb7b3a05STakashi Sakamoto midi = stm_pos; 274eb7b3a05STakashi Sakamoto break; 275eb7b3a05STakashi Sakamoto /* for PCM data channel */ 276eb7b3a05STakashi Sakamoto case 0x01: /* Headphone */ 277eb7b3a05STakashi Sakamoto case 0x02: /* Microphone */ 278eb7b3a05STakashi Sakamoto case 0x03: /* Line */ 279eb7b3a05STakashi Sakamoto case 0x04: /* SPDIF */ 280eb7b3a05STakashi Sakamoto case 0x05: /* ADAT */ 281eb7b3a05STakashi Sakamoto case 0x06: /* TDIF */ 282eb7b3a05STakashi Sakamoto case 0x07: /* MADI */ 283eb7b3a05STakashi Sakamoto /* for undefined/changeable signal */ 284eb7b3a05STakashi Sakamoto case 0x08: /* Analog */ 285eb7b3a05STakashi Sakamoto case 0x09: /* Digital */ 286eb7b3a05STakashi Sakamoto default: 287eb7b3a05STakashi Sakamoto location = pcm + sec_loc; 288eb7b3a05STakashi Sakamoto if (location >= AMDTP_MAX_CHANNELS_FOR_PCM) { 289eb7b3a05STakashi Sakamoto err = -ENOSYS; 290eb7b3a05STakashi Sakamoto goto end; 291eb7b3a05STakashi Sakamoto } 292eb7b3a05STakashi Sakamoto s->pcm_positions[location] = stm_pos; 293eb7b3a05STakashi Sakamoto break; 294eb7b3a05STakashi Sakamoto } 295eb7b3a05STakashi Sakamoto } 296eb7b3a05STakashi Sakamoto 297eb7b3a05STakashi Sakamoto if (type != 0x0a) 298eb7b3a05STakashi Sakamoto pcm += channels; 299eb7b3a05STakashi Sakamoto else 300eb7b3a05STakashi Sakamoto midi += channels; 301eb7b3a05STakashi Sakamoto } 302eb7b3a05STakashi Sakamoto end: 303eb7b3a05STakashi Sakamoto kfree(buf); 304eb7b3a05STakashi Sakamoto return err; 305eb7b3a05STakashi Sakamoto } 306eb7b3a05STakashi Sakamoto 307eb7b3a05STakashi Sakamoto static int 308eb7b3a05STakashi Sakamoto init_both_connections(struct snd_bebob *bebob) 309eb7b3a05STakashi Sakamoto { 310eb7b3a05STakashi Sakamoto int err; 311eb7b3a05STakashi Sakamoto 312eb7b3a05STakashi Sakamoto err = cmp_connection_init(&bebob->in_conn, 313eb7b3a05STakashi Sakamoto bebob->unit, CMP_INPUT, 0); 314eb7b3a05STakashi Sakamoto if (err < 0) 315eb7b3a05STakashi Sakamoto goto end; 316eb7b3a05STakashi Sakamoto 317eb7b3a05STakashi Sakamoto err = cmp_connection_init(&bebob->out_conn, 318eb7b3a05STakashi Sakamoto bebob->unit, CMP_OUTPUT, 0); 319eb7b3a05STakashi Sakamoto if (err < 0) 320eb7b3a05STakashi Sakamoto cmp_connection_destroy(&bebob->in_conn); 321eb7b3a05STakashi Sakamoto end: 322eb7b3a05STakashi Sakamoto return err; 323eb7b3a05STakashi Sakamoto } 324eb7b3a05STakashi Sakamoto 325eb7b3a05STakashi Sakamoto static int 326eb7b3a05STakashi Sakamoto check_connection_used_by_others(struct snd_bebob *bebob, struct amdtp_stream *s) 327eb7b3a05STakashi Sakamoto { 328eb7b3a05STakashi Sakamoto struct cmp_connection *conn; 329eb7b3a05STakashi Sakamoto bool used; 330eb7b3a05STakashi Sakamoto int err; 331eb7b3a05STakashi Sakamoto 332eb7b3a05STakashi Sakamoto if (s == &bebob->tx_stream) 333eb7b3a05STakashi Sakamoto conn = &bebob->out_conn; 334eb7b3a05STakashi Sakamoto else 335eb7b3a05STakashi Sakamoto conn = &bebob->in_conn; 336eb7b3a05STakashi Sakamoto 337eb7b3a05STakashi Sakamoto err = cmp_connection_check_used(conn, &used); 338eb7b3a05STakashi Sakamoto if ((err >= 0) && used && !amdtp_stream_running(s)) { 339eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 340eb7b3a05STakashi Sakamoto "Connection established by others: %cPCR[%d]\n", 341eb7b3a05STakashi Sakamoto (conn->direction == CMP_OUTPUT) ? 'o' : 'i', 342eb7b3a05STakashi Sakamoto conn->pcr_index); 343eb7b3a05STakashi Sakamoto err = -EBUSY; 344eb7b3a05STakashi Sakamoto } 345eb7b3a05STakashi Sakamoto 346eb7b3a05STakashi Sakamoto return err; 347eb7b3a05STakashi Sakamoto } 348eb7b3a05STakashi Sakamoto 349eb7b3a05STakashi Sakamoto static int 350eb7b3a05STakashi Sakamoto make_both_connections(struct snd_bebob *bebob, unsigned int rate) 351eb7b3a05STakashi Sakamoto { 352b6bc8123STakashi Sakamoto int index, pcm_channels, midi_channels, err = 0; 353b6bc8123STakashi Sakamoto 354b6bc8123STakashi Sakamoto if (bebob->connected) 355b6bc8123STakashi Sakamoto goto end; 356eb7b3a05STakashi Sakamoto 357eb7b3a05STakashi Sakamoto /* confirm params for both streams */ 358eb7b3a05STakashi Sakamoto index = get_formation_index(rate); 359eb7b3a05STakashi Sakamoto pcm_channels = bebob->tx_stream_formations[index].pcm; 360eb7b3a05STakashi Sakamoto midi_channels = bebob->tx_stream_formations[index].midi; 361eb7b3a05STakashi Sakamoto amdtp_stream_set_parameters(&bebob->tx_stream, 362eb7b3a05STakashi Sakamoto rate, pcm_channels, midi_channels * 8); 363eb7b3a05STakashi Sakamoto pcm_channels = bebob->rx_stream_formations[index].pcm; 364eb7b3a05STakashi Sakamoto midi_channels = bebob->rx_stream_formations[index].midi; 365eb7b3a05STakashi Sakamoto amdtp_stream_set_parameters(&bebob->rx_stream, 366eb7b3a05STakashi Sakamoto rate, pcm_channels, midi_channels * 8); 367eb7b3a05STakashi Sakamoto 368eb7b3a05STakashi Sakamoto /* establish connections for both streams */ 369eb7b3a05STakashi Sakamoto err = cmp_connection_establish(&bebob->out_conn, 370eb7b3a05STakashi Sakamoto amdtp_stream_get_max_payload(&bebob->tx_stream)); 371eb7b3a05STakashi Sakamoto if (err < 0) 372eb7b3a05STakashi Sakamoto goto end; 373eb7b3a05STakashi Sakamoto err = cmp_connection_establish(&bebob->in_conn, 374eb7b3a05STakashi Sakamoto amdtp_stream_get_max_payload(&bebob->rx_stream)); 375b6bc8123STakashi Sakamoto if (err < 0) { 376eb7b3a05STakashi Sakamoto cmp_connection_break(&bebob->out_conn); 377b6bc8123STakashi Sakamoto goto end; 378b6bc8123STakashi Sakamoto } 379b6bc8123STakashi Sakamoto 380b6bc8123STakashi Sakamoto bebob->connected = true; 381eb7b3a05STakashi Sakamoto end: 382eb7b3a05STakashi Sakamoto return err; 383eb7b3a05STakashi Sakamoto } 384eb7b3a05STakashi Sakamoto 385eb7b3a05STakashi Sakamoto static void 386eb7b3a05STakashi Sakamoto break_both_connections(struct snd_bebob *bebob) 387eb7b3a05STakashi Sakamoto { 388eb7b3a05STakashi Sakamoto cmp_connection_break(&bebob->in_conn); 389eb7b3a05STakashi Sakamoto cmp_connection_break(&bebob->out_conn); 390b6bc8123STakashi Sakamoto 391b6bc8123STakashi Sakamoto bebob->connected = false; 3923149ac48STakashi Sakamoto 3933149ac48STakashi Sakamoto /* These models seems to be in transition state for a longer time. */ 3943149ac48STakashi Sakamoto if (bebob->maudio_special_quirk != NULL) 3953149ac48STakashi Sakamoto msleep(200); 396eb7b3a05STakashi Sakamoto } 397eb7b3a05STakashi Sakamoto 398eb7b3a05STakashi Sakamoto static void 399eb7b3a05STakashi Sakamoto destroy_both_connections(struct snd_bebob *bebob) 400eb7b3a05STakashi Sakamoto { 401eb7b3a05STakashi Sakamoto break_both_connections(bebob); 402eb7b3a05STakashi Sakamoto 403eb7b3a05STakashi Sakamoto cmp_connection_destroy(&bebob->in_conn); 404eb7b3a05STakashi Sakamoto cmp_connection_destroy(&bebob->out_conn); 405eb7b3a05STakashi Sakamoto } 406eb7b3a05STakashi Sakamoto 407eb7b3a05STakashi Sakamoto static int 408eb7b3a05STakashi Sakamoto get_sync_mode(struct snd_bebob *bebob, enum cip_flags *sync_mode) 409eb7b3a05STakashi Sakamoto { 410eb7b3a05STakashi Sakamoto /* currently this module doesn't support SYT-Match mode */ 411eb7b3a05STakashi Sakamoto *sync_mode = CIP_SYNC_TO_DEVICE; 412eb7b3a05STakashi Sakamoto return 0; 413eb7b3a05STakashi Sakamoto } 414eb7b3a05STakashi Sakamoto 415eb7b3a05STakashi Sakamoto static int 416eb7b3a05STakashi Sakamoto start_stream(struct snd_bebob *bebob, struct amdtp_stream *stream, 417eb7b3a05STakashi Sakamoto unsigned int rate) 418eb7b3a05STakashi Sakamoto { 419eb7b3a05STakashi Sakamoto struct cmp_connection *conn; 420eb7b3a05STakashi Sakamoto int err = 0; 421eb7b3a05STakashi Sakamoto 422eb7b3a05STakashi Sakamoto if (stream == &bebob->rx_stream) 423eb7b3a05STakashi Sakamoto conn = &bebob->in_conn; 424eb7b3a05STakashi Sakamoto else 425eb7b3a05STakashi Sakamoto conn = &bebob->out_conn; 426eb7b3a05STakashi Sakamoto 427eb7b3a05STakashi Sakamoto /* channel mapping */ 4283149ac48STakashi Sakamoto if (bebob->maudio_special_quirk == NULL) { 429eb7b3a05STakashi Sakamoto err = map_data_channels(bebob, stream); 430eb7b3a05STakashi Sakamoto if (err < 0) 431eb7b3a05STakashi Sakamoto goto end; 4323149ac48STakashi Sakamoto } 433eb7b3a05STakashi Sakamoto 434eb7b3a05STakashi Sakamoto /* start amdtp stream */ 435eb7b3a05STakashi Sakamoto err = amdtp_stream_start(stream, 436eb7b3a05STakashi Sakamoto conn->resources.channel, 437eb7b3a05STakashi Sakamoto conn->speed); 438eb7b3a05STakashi Sakamoto end: 439eb7b3a05STakashi Sakamoto return err; 440eb7b3a05STakashi Sakamoto } 441eb7b3a05STakashi Sakamoto 442eb7b3a05STakashi Sakamoto int snd_bebob_stream_init_duplex(struct snd_bebob *bebob) 443eb7b3a05STakashi Sakamoto { 444eb7b3a05STakashi Sakamoto int err; 445eb7b3a05STakashi Sakamoto 446eb7b3a05STakashi Sakamoto err = init_both_connections(bebob); 447eb7b3a05STakashi Sakamoto if (err < 0) 448eb7b3a05STakashi Sakamoto goto end; 449eb7b3a05STakashi Sakamoto 450eb7b3a05STakashi Sakamoto err = amdtp_stream_init(&bebob->tx_stream, bebob->unit, 451eb7b3a05STakashi Sakamoto AMDTP_IN_STREAM, CIP_BLOCKING); 452eb7b3a05STakashi Sakamoto if (err < 0) { 453eb7b3a05STakashi Sakamoto amdtp_stream_destroy(&bebob->tx_stream); 454eb7b3a05STakashi Sakamoto destroy_both_connections(bebob); 455eb7b3a05STakashi Sakamoto goto end; 456eb7b3a05STakashi Sakamoto } 457b6bc8123STakashi Sakamoto /* See comments in next function */ 458b6bc8123STakashi Sakamoto init_completion(&bebob->bus_reset); 459b6bc8123STakashi Sakamoto bebob->tx_stream.flags |= CIP_SKIP_INIT_DBC_CHECK; 4609d59124cSTakashi Sakamoto /* 4619d59124cSTakashi Sakamoto * At high sampling rate, M-Audio special firmware transmits empty 4629d59124cSTakashi Sakamoto * packet with the value of dbc incremented by 8 but the others are 4639d59124cSTakashi Sakamoto * valid to IEC 61883-1. 4649d59124cSTakashi Sakamoto */ 4659d59124cSTakashi Sakamoto if (bebob->maudio_special_quirk) 4669d59124cSTakashi Sakamoto bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC; 467eb7b3a05STakashi Sakamoto 468eb7b3a05STakashi Sakamoto err = amdtp_stream_init(&bebob->rx_stream, bebob->unit, 469eb7b3a05STakashi Sakamoto AMDTP_OUT_STREAM, CIP_BLOCKING); 470eb7b3a05STakashi Sakamoto if (err < 0) { 471eb7b3a05STakashi Sakamoto amdtp_stream_destroy(&bebob->tx_stream); 472eb7b3a05STakashi Sakamoto amdtp_stream_destroy(&bebob->rx_stream); 473eb7b3a05STakashi Sakamoto destroy_both_connections(bebob); 474eb7b3a05STakashi Sakamoto } 475c495a4a3STakashi Sakamoto /* 476c495a4a3STakashi Sakamoto * The firmware for these devices ignore MIDI messages in more than 477c495a4a3STakashi Sakamoto * first 8 data blocks of an received AMDTP packet. 478c495a4a3STakashi Sakamoto */ 479c495a4a3STakashi Sakamoto if (bebob->spec == &maudio_fw410_spec || 480c495a4a3STakashi Sakamoto bebob->spec == &maudio_special_spec) 481c495a4a3STakashi Sakamoto bebob->rx_stream.rx_blocks_for_midi = 8; 482eb7b3a05STakashi Sakamoto end: 483eb7b3a05STakashi Sakamoto return err; 484eb7b3a05STakashi Sakamoto } 485eb7b3a05STakashi Sakamoto 4864a286d55STakashi Sakamoto int snd_bebob_stream_start_duplex(struct snd_bebob *bebob, unsigned int rate) 487eb7b3a05STakashi Sakamoto { 4881fc9522aSTakashi Sakamoto struct snd_bebob_rate_spec *rate_spec = bebob->spec->rate; 489eb7b3a05STakashi Sakamoto struct amdtp_stream *master, *slave; 490eb7b3a05STakashi Sakamoto atomic_t *slave_substreams; 491eb7b3a05STakashi Sakamoto enum cip_flags sync_mode; 492eb7b3a05STakashi Sakamoto unsigned int curr_rate; 493b6bc8123STakashi Sakamoto bool updated = false; 494eb7b3a05STakashi Sakamoto int err = 0; 495eb7b3a05STakashi Sakamoto 496b6bc8123STakashi Sakamoto /* 497b6bc8123STakashi Sakamoto * Normal BeBoB firmware has a quirk at bus reset to transmits packets 498b6bc8123STakashi Sakamoto * with discontinuous value in dbc field. 499b6bc8123STakashi Sakamoto * 500b6bc8123STakashi Sakamoto * This 'struct completion' is used to call .update() at first to update 501b6bc8123STakashi Sakamoto * connections/streams. Next following codes handle streaming error. 502b6bc8123STakashi Sakamoto */ 503b6bc8123STakashi Sakamoto if (amdtp_streaming_error(&bebob->tx_stream)) { 504b6bc8123STakashi Sakamoto if (completion_done(&bebob->bus_reset)) 505b6bc8123STakashi Sakamoto reinit_completion(&bebob->bus_reset); 506b6bc8123STakashi Sakamoto 507b6bc8123STakashi Sakamoto updated = (wait_for_completion_interruptible_timeout( 508b6bc8123STakashi Sakamoto &bebob->bus_reset, 509b6bc8123STakashi Sakamoto msecs_to_jiffies(FW_ISO_RESOURCE_DELAY)) > 0); 510b6bc8123STakashi Sakamoto } 511b6bc8123STakashi Sakamoto 512eb7b3a05STakashi Sakamoto mutex_lock(&bebob->mutex); 513eb7b3a05STakashi Sakamoto 514eb7b3a05STakashi Sakamoto /* Need no substreams */ 515eb7b3a05STakashi Sakamoto if (atomic_read(&bebob->playback_substreams) == 0 && 516eb7b3a05STakashi Sakamoto atomic_read(&bebob->capture_substreams) == 0) 517eb7b3a05STakashi Sakamoto goto end; 518eb7b3a05STakashi Sakamoto 519eb7b3a05STakashi Sakamoto err = get_sync_mode(bebob, &sync_mode); 520eb7b3a05STakashi Sakamoto if (err < 0) 521eb7b3a05STakashi Sakamoto goto end; 522eb7b3a05STakashi Sakamoto if (sync_mode == CIP_SYNC_TO_DEVICE) { 523eb7b3a05STakashi Sakamoto master = &bebob->tx_stream; 524eb7b3a05STakashi Sakamoto slave = &bebob->rx_stream; 525eb7b3a05STakashi Sakamoto slave_substreams = &bebob->playback_substreams; 526eb7b3a05STakashi Sakamoto } else { 527eb7b3a05STakashi Sakamoto master = &bebob->rx_stream; 528eb7b3a05STakashi Sakamoto slave = &bebob->tx_stream; 529eb7b3a05STakashi Sakamoto slave_substreams = &bebob->capture_substreams; 530eb7b3a05STakashi Sakamoto } 531eb7b3a05STakashi Sakamoto 532eb7b3a05STakashi Sakamoto /* 533eb7b3a05STakashi Sakamoto * Considering JACK/FFADO streaming: 534eb7b3a05STakashi Sakamoto * TODO: This can be removed hwdep functionality becomes popular. 535eb7b3a05STakashi Sakamoto */ 536eb7b3a05STakashi Sakamoto err = check_connection_used_by_others(bebob, master); 537eb7b3a05STakashi Sakamoto if (err < 0) 538eb7b3a05STakashi Sakamoto goto end; 539eb7b3a05STakashi Sakamoto 540b6bc8123STakashi Sakamoto /* 541b6bc8123STakashi Sakamoto * packet queueing error or detecting discontinuity 542b6bc8123STakashi Sakamoto * 543b6bc8123STakashi Sakamoto * At bus reset, connections should not be broken here. So streams need 544b6bc8123STakashi Sakamoto * to be re-started. This is a reason to use SKIP_INIT_DBC_CHECK flag. 545b6bc8123STakashi Sakamoto */ 546b6bc8123STakashi Sakamoto if (amdtp_streaming_error(master)) 547eb7b3a05STakashi Sakamoto amdtp_stream_stop(master); 548eb7b3a05STakashi Sakamoto if (amdtp_streaming_error(slave)) 549eb7b3a05STakashi Sakamoto amdtp_stream_stop(slave); 550b6bc8123STakashi Sakamoto if (!updated && 551b6bc8123STakashi Sakamoto !amdtp_stream_running(master) && !amdtp_stream_running(slave)) 552b6bc8123STakashi Sakamoto break_both_connections(bebob); 553eb7b3a05STakashi Sakamoto 554eb7b3a05STakashi Sakamoto /* stop streams if rate is different */ 5551fc9522aSTakashi Sakamoto err = rate_spec->get(bebob, &curr_rate); 556eb7b3a05STakashi Sakamoto if (err < 0) { 557eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 558eb7b3a05STakashi Sakamoto "fail to get sampling rate: %d\n", err); 559eb7b3a05STakashi Sakamoto goto end; 560eb7b3a05STakashi Sakamoto } 561eb7b3a05STakashi Sakamoto if (rate == 0) 562eb7b3a05STakashi Sakamoto rate = curr_rate; 563eb7b3a05STakashi Sakamoto if (rate != curr_rate) { 564eb7b3a05STakashi Sakamoto amdtp_stream_stop(master); 565eb7b3a05STakashi Sakamoto amdtp_stream_stop(slave); 566eb7b3a05STakashi Sakamoto break_both_connections(bebob); 567eb7b3a05STakashi Sakamoto } 568eb7b3a05STakashi Sakamoto 569eb7b3a05STakashi Sakamoto /* master should be always running */ 570eb7b3a05STakashi Sakamoto if (!amdtp_stream_running(master)) { 571eb7b3a05STakashi Sakamoto amdtp_stream_set_sync(sync_mode, master, slave); 572eb7b3a05STakashi Sakamoto bebob->master = master; 573eb7b3a05STakashi Sakamoto 574eb7b3a05STakashi Sakamoto /* 575eb7b3a05STakashi Sakamoto * NOTE: 576eb7b3a05STakashi Sakamoto * If establishing connections at first, Yamaha GO46 577eb7b3a05STakashi Sakamoto * (and maybe Terratec X24) don't generate sound. 5783149ac48STakashi Sakamoto * 5793149ac48STakashi Sakamoto * For firmware customized by M-Audio, refer to next NOTE. 580eb7b3a05STakashi Sakamoto */ 5813149ac48STakashi Sakamoto if (bebob->maudio_special_quirk == NULL) { 5821fc9522aSTakashi Sakamoto err = rate_spec->set(bebob, rate); 583eb7b3a05STakashi Sakamoto if (err < 0) { 584eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 585eb7b3a05STakashi Sakamoto "fail to set sampling rate: %d\n", 586eb7b3a05STakashi Sakamoto err); 587eb7b3a05STakashi Sakamoto goto end; 588eb7b3a05STakashi Sakamoto } 5893149ac48STakashi Sakamoto } 590eb7b3a05STakashi Sakamoto 591eb7b3a05STakashi Sakamoto err = make_both_connections(bebob, rate); 592eb7b3a05STakashi Sakamoto if (err < 0) 593eb7b3a05STakashi Sakamoto goto end; 594eb7b3a05STakashi Sakamoto 595eb7b3a05STakashi Sakamoto err = start_stream(bebob, master, rate); 596eb7b3a05STakashi Sakamoto if (err < 0) { 597eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 598eb7b3a05STakashi Sakamoto "fail to run AMDTP master stream:%d\n", err); 599eb7b3a05STakashi Sakamoto break_both_connections(bebob); 600eb7b3a05STakashi Sakamoto goto end; 601eb7b3a05STakashi Sakamoto } 602eb7b3a05STakashi Sakamoto 6033149ac48STakashi Sakamoto /* 6043149ac48STakashi Sakamoto * NOTE: 6053149ac48STakashi Sakamoto * The firmware customized by M-Audio uses these commands to 6063149ac48STakashi Sakamoto * start transmitting stream. This is not usual way. 6073149ac48STakashi Sakamoto */ 6083149ac48STakashi Sakamoto if (bebob->maudio_special_quirk != NULL) { 6093149ac48STakashi Sakamoto err = rate_spec->set(bebob, rate); 6103149ac48STakashi Sakamoto if (err < 0) { 6113149ac48STakashi Sakamoto dev_err(&bebob->unit->device, 6123149ac48STakashi Sakamoto "fail to ensure sampling rate: %d\n", 6133149ac48STakashi Sakamoto err); 6143149ac48STakashi Sakamoto amdtp_stream_stop(master); 6153149ac48STakashi Sakamoto break_both_connections(bebob); 6163149ac48STakashi Sakamoto goto end; 6173149ac48STakashi Sakamoto } 6183149ac48STakashi Sakamoto } 6193149ac48STakashi Sakamoto 620eb7b3a05STakashi Sakamoto /* wait first callback */ 621eb7b3a05STakashi Sakamoto if (!amdtp_stream_wait_callback(master, CALLBACK_TIMEOUT)) { 622eb7b3a05STakashi Sakamoto amdtp_stream_stop(master); 623eb7b3a05STakashi Sakamoto break_both_connections(bebob); 624eb7b3a05STakashi Sakamoto err = -ETIMEDOUT; 625eb7b3a05STakashi Sakamoto goto end; 626eb7b3a05STakashi Sakamoto } 627eb7b3a05STakashi Sakamoto } 628eb7b3a05STakashi Sakamoto 629eb7b3a05STakashi Sakamoto /* start slave if needed */ 630eb7b3a05STakashi Sakamoto if (atomic_read(slave_substreams) > 0 && !amdtp_stream_running(slave)) { 631eb7b3a05STakashi Sakamoto err = start_stream(bebob, slave, rate); 632eb7b3a05STakashi Sakamoto if (err < 0) { 633eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 634eb7b3a05STakashi Sakamoto "fail to run AMDTP slave stream:%d\n", err); 635eb7b3a05STakashi Sakamoto amdtp_stream_stop(master); 636eb7b3a05STakashi Sakamoto break_both_connections(bebob); 637eb7b3a05STakashi Sakamoto goto end; 638eb7b3a05STakashi Sakamoto } 639eb7b3a05STakashi Sakamoto 640eb7b3a05STakashi Sakamoto /* wait first callback */ 641eb7b3a05STakashi Sakamoto if (!amdtp_stream_wait_callback(slave, CALLBACK_TIMEOUT)) { 642eb7b3a05STakashi Sakamoto amdtp_stream_stop(slave); 643eb7b3a05STakashi Sakamoto amdtp_stream_stop(master); 644eb7b3a05STakashi Sakamoto break_both_connections(bebob); 645eb7b3a05STakashi Sakamoto err = -ETIMEDOUT; 646eb7b3a05STakashi Sakamoto } 647eb7b3a05STakashi Sakamoto } 648eb7b3a05STakashi Sakamoto end: 649eb7b3a05STakashi Sakamoto mutex_unlock(&bebob->mutex); 650eb7b3a05STakashi Sakamoto return err; 651eb7b3a05STakashi Sakamoto } 652eb7b3a05STakashi Sakamoto 653eb7b3a05STakashi Sakamoto void snd_bebob_stream_stop_duplex(struct snd_bebob *bebob) 654eb7b3a05STakashi Sakamoto { 655eb7b3a05STakashi Sakamoto struct amdtp_stream *master, *slave; 656eb7b3a05STakashi Sakamoto atomic_t *master_substreams, *slave_substreams; 657eb7b3a05STakashi Sakamoto 658eb7b3a05STakashi Sakamoto mutex_lock(&bebob->mutex); 659eb7b3a05STakashi Sakamoto 660eb7b3a05STakashi Sakamoto if (bebob->master == &bebob->rx_stream) { 661eb7b3a05STakashi Sakamoto slave = &bebob->tx_stream; 662eb7b3a05STakashi Sakamoto master = &bebob->rx_stream; 663eb7b3a05STakashi Sakamoto slave_substreams = &bebob->capture_substreams; 664eb7b3a05STakashi Sakamoto master_substreams = &bebob->playback_substreams; 665eb7b3a05STakashi Sakamoto } else { 666eb7b3a05STakashi Sakamoto slave = &bebob->rx_stream; 667eb7b3a05STakashi Sakamoto master = &bebob->tx_stream; 668eb7b3a05STakashi Sakamoto slave_substreams = &bebob->playback_substreams; 669eb7b3a05STakashi Sakamoto master_substreams = &bebob->capture_substreams; 670eb7b3a05STakashi Sakamoto } 671eb7b3a05STakashi Sakamoto 672eb7b3a05STakashi Sakamoto if (atomic_read(slave_substreams) == 0) { 673eb7b3a05STakashi Sakamoto amdtp_stream_pcm_abort(slave); 674eb7b3a05STakashi Sakamoto amdtp_stream_stop(slave); 675eb7b3a05STakashi Sakamoto 676eb7b3a05STakashi Sakamoto if (atomic_read(master_substreams) == 0) { 677eb7b3a05STakashi Sakamoto amdtp_stream_pcm_abort(master); 678eb7b3a05STakashi Sakamoto amdtp_stream_stop(master); 679eb7b3a05STakashi Sakamoto break_both_connections(bebob); 680eb7b3a05STakashi Sakamoto } 681eb7b3a05STakashi Sakamoto } 682eb7b3a05STakashi Sakamoto 683eb7b3a05STakashi Sakamoto mutex_unlock(&bebob->mutex); 684eb7b3a05STakashi Sakamoto } 685eb7b3a05STakashi Sakamoto 686eb7b3a05STakashi Sakamoto void snd_bebob_stream_update_duplex(struct snd_bebob *bebob) 687eb7b3a05STakashi Sakamoto { 688eb7b3a05STakashi Sakamoto /* vs. XRUN recovery due to discontinuity at bus reset */ 689eb7b3a05STakashi Sakamoto mutex_lock(&bebob->mutex); 690eb7b3a05STakashi Sakamoto 691eb7b3a05STakashi Sakamoto if ((cmp_connection_update(&bebob->in_conn) < 0) || 692eb7b3a05STakashi Sakamoto (cmp_connection_update(&bebob->out_conn) < 0)) { 693eb7b3a05STakashi Sakamoto amdtp_stream_pcm_abort(&bebob->rx_stream); 694eb7b3a05STakashi Sakamoto amdtp_stream_pcm_abort(&bebob->tx_stream); 695eb7b3a05STakashi Sakamoto amdtp_stream_stop(&bebob->rx_stream); 696eb7b3a05STakashi Sakamoto amdtp_stream_stop(&bebob->tx_stream); 697eb7b3a05STakashi Sakamoto break_both_connections(bebob); 698eb7b3a05STakashi Sakamoto } else { 699eb7b3a05STakashi Sakamoto amdtp_stream_update(&bebob->rx_stream); 700eb7b3a05STakashi Sakamoto amdtp_stream_update(&bebob->tx_stream); 701eb7b3a05STakashi Sakamoto } 702eb7b3a05STakashi Sakamoto 703b6bc8123STakashi Sakamoto /* wake up stream_start_duplex() */ 704b6bc8123STakashi Sakamoto if (!completion_done(&bebob->bus_reset)) 705b6bc8123STakashi Sakamoto complete_all(&bebob->bus_reset); 706b6bc8123STakashi Sakamoto 707eb7b3a05STakashi Sakamoto mutex_unlock(&bebob->mutex); 708eb7b3a05STakashi Sakamoto } 709eb7b3a05STakashi Sakamoto 710eb7b3a05STakashi Sakamoto void snd_bebob_stream_destroy_duplex(struct snd_bebob *bebob) 711eb7b3a05STakashi Sakamoto { 712eb7b3a05STakashi Sakamoto mutex_lock(&bebob->mutex); 713eb7b3a05STakashi Sakamoto 714eb7b3a05STakashi Sakamoto amdtp_stream_pcm_abort(&bebob->rx_stream); 715eb7b3a05STakashi Sakamoto amdtp_stream_pcm_abort(&bebob->tx_stream); 716eb7b3a05STakashi Sakamoto 717eb7b3a05STakashi Sakamoto amdtp_stream_stop(&bebob->rx_stream); 718eb7b3a05STakashi Sakamoto amdtp_stream_stop(&bebob->tx_stream); 719eb7b3a05STakashi Sakamoto 720eb7b3a05STakashi Sakamoto amdtp_stream_destroy(&bebob->rx_stream); 721eb7b3a05STakashi Sakamoto amdtp_stream_destroy(&bebob->tx_stream); 722eb7b3a05STakashi Sakamoto 723eb7b3a05STakashi Sakamoto destroy_both_connections(bebob); 724eb7b3a05STakashi Sakamoto 725eb7b3a05STakashi Sakamoto mutex_unlock(&bebob->mutex); 726eb7b3a05STakashi Sakamoto } 727eb7b3a05STakashi Sakamoto 728eb7b3a05STakashi Sakamoto /* 729eb7b3a05STakashi Sakamoto * See: Table 50: Extended Stream Format Info Format Hierarchy Level 2’ 730eb7b3a05STakashi Sakamoto * in Additional AVC commands (Nov 2003, BridgeCo) 731eb7b3a05STakashi Sakamoto * Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005 732eb7b3a05STakashi Sakamoto */ 733eb7b3a05STakashi Sakamoto static int 734eb7b3a05STakashi Sakamoto parse_stream_formation(u8 *buf, unsigned int len, 735eb7b3a05STakashi Sakamoto struct snd_bebob_stream_formation *formation) 736eb7b3a05STakashi Sakamoto { 737eb7b3a05STakashi Sakamoto unsigned int i, e, channels, format; 738eb7b3a05STakashi Sakamoto 739eb7b3a05STakashi Sakamoto /* 740eb7b3a05STakashi Sakamoto * this module can support a hierarchy combination that: 741eb7b3a05STakashi Sakamoto * Root: Audio and Music (0x90) 742eb7b3a05STakashi Sakamoto * Level 1: AM824 Compound (0x40) 743eb7b3a05STakashi Sakamoto */ 744eb7b3a05STakashi Sakamoto if ((buf[0] != 0x90) || (buf[1] != 0x40)) 745eb7b3a05STakashi Sakamoto return -ENOSYS; 746eb7b3a05STakashi Sakamoto 747eb7b3a05STakashi Sakamoto /* check sampling rate */ 748eb7b3a05STakashi Sakamoto for (i = 0; i < ARRAY_SIZE(bridgeco_freq_table); i++) { 749eb7b3a05STakashi Sakamoto if (buf[2] == bridgeco_freq_table[i]) 750eb7b3a05STakashi Sakamoto break; 751eb7b3a05STakashi Sakamoto } 752eb7b3a05STakashi Sakamoto if (i == sizeof(bridgeco_freq_table)) 753eb7b3a05STakashi Sakamoto return -ENOSYS; 754eb7b3a05STakashi Sakamoto 755eb7b3a05STakashi Sakamoto /* Avoid double count by different entries for the same rate. */ 756eb7b3a05STakashi Sakamoto memset(&formation[i], 0, sizeof(struct snd_bebob_stream_formation)); 757eb7b3a05STakashi Sakamoto 758eb7b3a05STakashi Sakamoto for (e = 0; e < buf[4]; e++) { 759eb7b3a05STakashi Sakamoto channels = buf[5 + e * 2]; 760eb7b3a05STakashi Sakamoto format = buf[6 + e * 2]; 761eb7b3a05STakashi Sakamoto 762eb7b3a05STakashi Sakamoto switch (format) { 76351fa31d4STakashi Sakamoto /* IEC 60958 Conformant, currently handled as MBLA */ 764eb7b3a05STakashi Sakamoto case 0x00: 765eb7b3a05STakashi Sakamoto /* Multi bit linear audio */ 766eb7b3a05STakashi Sakamoto case 0x06: /* Raw */ 767eb7b3a05STakashi Sakamoto formation[i].pcm += channels; 768eb7b3a05STakashi Sakamoto break; 769eb7b3a05STakashi Sakamoto /* MIDI Conformant */ 770eb7b3a05STakashi Sakamoto case 0x0d: 771eb7b3a05STakashi Sakamoto formation[i].midi += channels; 772eb7b3a05STakashi Sakamoto break; 773eb7b3a05STakashi Sakamoto /* IEC 61937-3 to 7 */ 774eb7b3a05STakashi Sakamoto case 0x01: 775eb7b3a05STakashi Sakamoto case 0x02: 776eb7b3a05STakashi Sakamoto case 0x03: 777eb7b3a05STakashi Sakamoto case 0x04: 778eb7b3a05STakashi Sakamoto case 0x05: 779eb7b3a05STakashi Sakamoto /* Multi bit linear audio */ 780eb7b3a05STakashi Sakamoto case 0x07: /* DVD-Audio */ 781eb7b3a05STakashi Sakamoto case 0x0c: /* High Precision */ 782eb7b3a05STakashi Sakamoto /* One Bit Audio */ 783eb7b3a05STakashi Sakamoto case 0x08: /* (Plain) Raw */ 784eb7b3a05STakashi Sakamoto case 0x09: /* (Plain) SACD */ 785eb7b3a05STakashi Sakamoto case 0x0a: /* (Encoded) Raw */ 786eb7b3a05STakashi Sakamoto case 0x0b: /* (Encoded) SACD */ 787eb7b3a05STakashi Sakamoto /* Synchronization Stream (Stereo Raw audio) */ 788eb7b3a05STakashi Sakamoto case 0x40: 789eb7b3a05STakashi Sakamoto /* Don't care */ 790eb7b3a05STakashi Sakamoto case 0xff: 791eb7b3a05STakashi Sakamoto default: 792eb7b3a05STakashi Sakamoto return -ENOSYS; /* not supported */ 793eb7b3a05STakashi Sakamoto } 794eb7b3a05STakashi Sakamoto } 795eb7b3a05STakashi Sakamoto 796eb7b3a05STakashi Sakamoto if (formation[i].pcm > AMDTP_MAX_CHANNELS_FOR_PCM || 797eb7b3a05STakashi Sakamoto formation[i].midi > AMDTP_MAX_CHANNELS_FOR_MIDI) 798eb7b3a05STakashi Sakamoto return -ENOSYS; 799eb7b3a05STakashi Sakamoto 800eb7b3a05STakashi Sakamoto return 0; 801eb7b3a05STakashi Sakamoto } 802eb7b3a05STakashi Sakamoto 803eb7b3a05STakashi Sakamoto static int 804eb7b3a05STakashi Sakamoto fill_stream_formations(struct snd_bebob *bebob, enum avc_bridgeco_plug_dir dir, 805eb7b3a05STakashi Sakamoto unsigned short pid) 806eb7b3a05STakashi Sakamoto { 807eb7b3a05STakashi Sakamoto u8 *buf; 808eb7b3a05STakashi Sakamoto struct snd_bebob_stream_formation *formations; 809eb7b3a05STakashi Sakamoto unsigned int len, eid; 810eb7b3a05STakashi Sakamoto u8 addr[AVC_BRIDGECO_ADDR_BYTES]; 811eb7b3a05STakashi Sakamoto int err; 812eb7b3a05STakashi Sakamoto 813eb7b3a05STakashi Sakamoto buf = kmalloc(FORMAT_MAXIMUM_LENGTH, GFP_KERNEL); 814eb7b3a05STakashi Sakamoto if (buf == NULL) 815eb7b3a05STakashi Sakamoto return -ENOMEM; 816eb7b3a05STakashi Sakamoto 817eb7b3a05STakashi Sakamoto if (dir == AVC_BRIDGECO_PLUG_DIR_IN) 818eb7b3a05STakashi Sakamoto formations = bebob->rx_stream_formations; 819eb7b3a05STakashi Sakamoto else 820eb7b3a05STakashi Sakamoto formations = bebob->tx_stream_formations; 821eb7b3a05STakashi Sakamoto 822eb7b3a05STakashi Sakamoto for (eid = 0; eid < SND_BEBOB_STRM_FMT_ENTRIES; eid++) { 823eb7b3a05STakashi Sakamoto len = FORMAT_MAXIMUM_LENGTH; 824eb7b3a05STakashi Sakamoto avc_bridgeco_fill_unit_addr(addr, dir, 825eb7b3a05STakashi Sakamoto AVC_BRIDGECO_PLUG_UNIT_ISOC, pid); 826eb7b3a05STakashi Sakamoto err = avc_bridgeco_get_plug_strm_fmt(bebob->unit, addr, buf, 827eb7b3a05STakashi Sakamoto &len, eid); 828eb7b3a05STakashi Sakamoto /* No entries remained. */ 829eb7b3a05STakashi Sakamoto if (err == -EINVAL && eid > 0) { 830eb7b3a05STakashi Sakamoto err = 0; 831eb7b3a05STakashi Sakamoto break; 832eb7b3a05STakashi Sakamoto } else if (err < 0) { 833eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 834eb7b3a05STakashi Sakamoto "fail to get stream format %d for isoc %s plug %d:%d\n", 835eb7b3a05STakashi Sakamoto eid, 836eb7b3a05STakashi Sakamoto (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : 837eb7b3a05STakashi Sakamoto "out", 838eb7b3a05STakashi Sakamoto pid, err); 839eb7b3a05STakashi Sakamoto break; 840eb7b3a05STakashi Sakamoto } 841eb7b3a05STakashi Sakamoto 842eb7b3a05STakashi Sakamoto err = parse_stream_formation(buf, len, formations); 843eb7b3a05STakashi Sakamoto if (err < 0) 844eb7b3a05STakashi Sakamoto break; 845eb7b3a05STakashi Sakamoto } 846eb7b3a05STakashi Sakamoto 847eb7b3a05STakashi Sakamoto kfree(buf); 848eb7b3a05STakashi Sakamoto return err; 849eb7b3a05STakashi Sakamoto } 850eb7b3a05STakashi Sakamoto 851eb7b3a05STakashi Sakamoto static int 852eb7b3a05STakashi Sakamoto seek_msu_sync_input_plug(struct snd_bebob *bebob) 853eb7b3a05STakashi Sakamoto { 854eb7b3a05STakashi Sakamoto u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES]; 855a6b598bfSTakashi Sakamoto unsigned int i; 856a6b598bfSTakashi Sakamoto enum avc_bridgeco_plug_type type; 857eb7b3a05STakashi Sakamoto int err; 858eb7b3a05STakashi Sakamoto 859eb7b3a05STakashi Sakamoto /* Get the number of Music Sub Unit for both direction. */ 860eb7b3a05STakashi Sakamoto err = avc_general_get_plug_info(bebob->unit, 0x0c, 0x00, 0x00, plugs); 861eb7b3a05STakashi Sakamoto if (err < 0) { 862eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 863eb7b3a05STakashi Sakamoto "fail to get info for MSU in/out plugs: %d\n", 864eb7b3a05STakashi Sakamoto err); 865eb7b3a05STakashi Sakamoto goto end; 866eb7b3a05STakashi Sakamoto } 867eb7b3a05STakashi Sakamoto 868eb7b3a05STakashi Sakamoto /* seek destination plugs for 'MSU sync input' */ 869eb7b3a05STakashi Sakamoto bebob->sync_input_plug = -1; 870eb7b3a05STakashi Sakamoto for (i = 0; i < plugs[0]; i++) { 871eb7b3a05STakashi Sakamoto avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, i); 872eb7b3a05STakashi Sakamoto err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 873eb7b3a05STakashi Sakamoto if (err < 0) { 874eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 875eb7b3a05STakashi Sakamoto "fail to get type for MSU in plug %d: %d\n", 876eb7b3a05STakashi Sakamoto i, err); 877eb7b3a05STakashi Sakamoto goto end; 878eb7b3a05STakashi Sakamoto } 879eb7b3a05STakashi Sakamoto 880eb7b3a05STakashi Sakamoto if (type == AVC_BRIDGECO_PLUG_TYPE_SYNC) { 881eb7b3a05STakashi Sakamoto bebob->sync_input_plug = i; 882eb7b3a05STakashi Sakamoto break; 883eb7b3a05STakashi Sakamoto } 884eb7b3a05STakashi Sakamoto } 885eb7b3a05STakashi Sakamoto end: 886eb7b3a05STakashi Sakamoto return err; 887eb7b3a05STakashi Sakamoto } 888eb7b3a05STakashi Sakamoto 889eb7b3a05STakashi Sakamoto int snd_bebob_stream_discover(struct snd_bebob *bebob) 890eb7b3a05STakashi Sakamoto { 8911fc9522aSTakashi Sakamoto struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock; 892eb7b3a05STakashi Sakamoto u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES]; 893eb7b3a05STakashi Sakamoto enum avc_bridgeco_plug_type type; 894eb7b3a05STakashi Sakamoto unsigned int i; 895eb7b3a05STakashi Sakamoto int err; 896eb7b3a05STakashi Sakamoto 897eb7b3a05STakashi Sakamoto /* the number of plugs for isoc in/out, ext in/out */ 898eb7b3a05STakashi Sakamoto err = avc_general_get_plug_info(bebob->unit, 0x1f, 0x07, 0x00, plugs); 899eb7b3a05STakashi Sakamoto if (err < 0) { 900eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 901eb7b3a05STakashi Sakamoto "fail to get info for isoc/external in/out plugs: %d\n", 902eb7b3a05STakashi Sakamoto err); 903eb7b3a05STakashi Sakamoto goto end; 904eb7b3a05STakashi Sakamoto } 905eb7b3a05STakashi Sakamoto 906eb7b3a05STakashi Sakamoto /* 907eb7b3a05STakashi Sakamoto * This module supports at least one isoc input plug and one isoc 908eb7b3a05STakashi Sakamoto * output plug. 909eb7b3a05STakashi Sakamoto */ 910eb7b3a05STakashi Sakamoto if ((plugs[0] == 0) || (plugs[1] == 0)) { 911eb7b3a05STakashi Sakamoto err = -ENOSYS; 912eb7b3a05STakashi Sakamoto goto end; 913eb7b3a05STakashi Sakamoto } 914eb7b3a05STakashi Sakamoto 915eb7b3a05STakashi Sakamoto avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, 916eb7b3a05STakashi Sakamoto AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); 917eb7b3a05STakashi Sakamoto err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 918eb7b3a05STakashi Sakamoto if (err < 0) { 919eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 920eb7b3a05STakashi Sakamoto "fail to get type for isoc in plug 0: %d\n", err); 921eb7b3a05STakashi Sakamoto goto end; 922eb7b3a05STakashi Sakamoto } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) { 923eb7b3a05STakashi Sakamoto err = -ENOSYS; 924eb7b3a05STakashi Sakamoto goto end; 925eb7b3a05STakashi Sakamoto } 926eb7b3a05STakashi Sakamoto err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_IN, 0); 927eb7b3a05STakashi Sakamoto if (err < 0) 928eb7b3a05STakashi Sakamoto goto end; 929eb7b3a05STakashi Sakamoto 930eb7b3a05STakashi Sakamoto avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT, 931eb7b3a05STakashi Sakamoto AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); 932eb7b3a05STakashi Sakamoto err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 933eb7b3a05STakashi Sakamoto if (err < 0) { 934eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 935eb7b3a05STakashi Sakamoto "fail to get type for isoc out plug 0: %d\n", err); 936eb7b3a05STakashi Sakamoto goto end; 937eb7b3a05STakashi Sakamoto } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) { 938eb7b3a05STakashi Sakamoto err = -ENOSYS; 939eb7b3a05STakashi Sakamoto goto end; 940eb7b3a05STakashi Sakamoto } 941eb7b3a05STakashi Sakamoto err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_OUT, 0); 942eb7b3a05STakashi Sakamoto if (err < 0) 943eb7b3a05STakashi Sakamoto goto end; 944eb7b3a05STakashi Sakamoto 945eb7b3a05STakashi Sakamoto /* count external input plugs for MIDI */ 946eb7b3a05STakashi Sakamoto bebob->midi_input_ports = 0; 947eb7b3a05STakashi Sakamoto for (i = 0; i < plugs[2]; i++) { 948eb7b3a05STakashi Sakamoto avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, 949eb7b3a05STakashi Sakamoto AVC_BRIDGECO_PLUG_UNIT_EXT, i); 950eb7b3a05STakashi Sakamoto err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 951eb7b3a05STakashi Sakamoto if (err < 0) { 952eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 953eb7b3a05STakashi Sakamoto "fail to get type for external in plug %d: %d\n", 954eb7b3a05STakashi Sakamoto i, err); 955eb7b3a05STakashi Sakamoto goto end; 956eb7b3a05STakashi Sakamoto } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) { 957eb7b3a05STakashi Sakamoto bebob->midi_input_ports++; 958eb7b3a05STakashi Sakamoto } 959eb7b3a05STakashi Sakamoto } 960eb7b3a05STakashi Sakamoto 961eb7b3a05STakashi Sakamoto /* count external output plugs for MIDI */ 962eb7b3a05STakashi Sakamoto bebob->midi_output_ports = 0; 963eb7b3a05STakashi Sakamoto for (i = 0; i < plugs[3]; i++) { 964eb7b3a05STakashi Sakamoto avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT, 965eb7b3a05STakashi Sakamoto AVC_BRIDGECO_PLUG_UNIT_EXT, i); 966eb7b3a05STakashi Sakamoto err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 967eb7b3a05STakashi Sakamoto if (err < 0) { 968eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 969eb7b3a05STakashi Sakamoto "fail to get type for external out plug %d: %d\n", 970eb7b3a05STakashi Sakamoto i, err); 971eb7b3a05STakashi Sakamoto goto end; 972eb7b3a05STakashi Sakamoto } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) { 973eb7b3a05STakashi Sakamoto bebob->midi_output_ports++; 974eb7b3a05STakashi Sakamoto } 975eb7b3a05STakashi Sakamoto } 976eb7b3a05STakashi Sakamoto 977eb7b3a05STakashi Sakamoto /* for check source of clock later */ 9781fc9522aSTakashi Sakamoto if (!clk_spec) 979eb7b3a05STakashi Sakamoto err = seek_msu_sync_input_plug(bebob); 980eb7b3a05STakashi Sakamoto end: 981eb7b3a05STakashi Sakamoto return err; 982eb7b3a05STakashi Sakamoto } 983618eabeaSTakashi Sakamoto 984618eabeaSTakashi Sakamoto void snd_bebob_stream_lock_changed(struct snd_bebob *bebob) 985618eabeaSTakashi Sakamoto { 986618eabeaSTakashi Sakamoto bebob->dev_lock_changed = true; 987618eabeaSTakashi Sakamoto wake_up(&bebob->hwdep_wait); 988618eabeaSTakashi Sakamoto } 989618eabeaSTakashi Sakamoto 990618eabeaSTakashi Sakamoto int snd_bebob_stream_lock_try(struct snd_bebob *bebob) 991618eabeaSTakashi Sakamoto { 992618eabeaSTakashi Sakamoto int err; 993618eabeaSTakashi Sakamoto 994618eabeaSTakashi Sakamoto spin_lock_irq(&bebob->lock); 995618eabeaSTakashi Sakamoto 996618eabeaSTakashi Sakamoto /* user land lock this */ 997618eabeaSTakashi Sakamoto if (bebob->dev_lock_count < 0) { 998618eabeaSTakashi Sakamoto err = -EBUSY; 999618eabeaSTakashi Sakamoto goto end; 1000618eabeaSTakashi Sakamoto } 1001618eabeaSTakashi Sakamoto 1002618eabeaSTakashi Sakamoto /* this is the first time */ 1003618eabeaSTakashi Sakamoto if (bebob->dev_lock_count++ == 0) 1004618eabeaSTakashi Sakamoto snd_bebob_stream_lock_changed(bebob); 1005618eabeaSTakashi Sakamoto err = 0; 1006618eabeaSTakashi Sakamoto end: 1007618eabeaSTakashi Sakamoto spin_unlock_irq(&bebob->lock); 1008618eabeaSTakashi Sakamoto return err; 1009618eabeaSTakashi Sakamoto } 1010618eabeaSTakashi Sakamoto 1011618eabeaSTakashi Sakamoto void snd_bebob_stream_lock_release(struct snd_bebob *bebob) 1012618eabeaSTakashi Sakamoto { 1013618eabeaSTakashi Sakamoto spin_lock_irq(&bebob->lock); 1014618eabeaSTakashi Sakamoto 1015618eabeaSTakashi Sakamoto if (WARN_ON(bebob->dev_lock_count <= 0)) 1016618eabeaSTakashi Sakamoto goto end; 1017618eabeaSTakashi Sakamoto if (--bebob->dev_lock_count == 0) 1018618eabeaSTakashi Sakamoto snd_bebob_stream_lock_changed(bebob); 1019618eabeaSTakashi Sakamoto end: 1020618eabeaSTakashi Sakamoto spin_unlock_irq(&bebob->lock); 1021618eabeaSTakashi Sakamoto } 1022