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); 132d1d0b6b6SChristian Vogel if (err < 0) { 1331fc9522aSTakashi Sakamoto dev_err(&bebob->unit->device, 1341fc9522aSTakashi Sakamoto "fail to get clock source: %d\n", err); 135d1d0b6b6SChristian Vogel goto end; 136d1d0b6b6SChristian Vogel } 137d1d0b6b6SChristian Vogel 138d1d0b6b6SChristian Vogel if (id >= clk_spec->num) { 139d1d0b6b6SChristian Vogel dev_err(&bebob->unit->device, 140d1d0b6b6SChristian Vogel "clock source %d out of range 0..%d\n", 141d1d0b6b6SChristian Vogel id, clk_spec->num - 1); 142d1d0b6b6SChristian Vogel err = -EIO; 143d1d0b6b6SChristian Vogel goto end; 144d1d0b6b6SChristian Vogel } 145d1d0b6b6SChristian Vogel 146d1d0b6b6SChristian Vogel if (strncmp(clk_spec->labels[id], SND_BEBOB_CLOCK_INTERNAL, 1471fc9522aSTakashi Sakamoto strlen(SND_BEBOB_CLOCK_INTERNAL)) == 0) 1481fc9522aSTakashi Sakamoto *internal = true; 149d1d0b6b6SChristian Vogel 1501fc9522aSTakashi Sakamoto goto end; 1511fc9522aSTakashi Sakamoto } 1521fc9522aSTakashi Sakamoto 153eb7b3a05STakashi Sakamoto /* 1541fc9522aSTakashi Sakamoto * 2.The device don't support to switch source of clock then assumed 155eb7b3a05STakashi Sakamoto * to use internal clock always 156eb7b3a05STakashi Sakamoto */ 157eb7b3a05STakashi Sakamoto if (bebob->sync_input_plug < 0) { 158eb7b3a05STakashi Sakamoto *internal = true; 159eb7b3a05STakashi Sakamoto goto end; 160eb7b3a05STakashi Sakamoto } 161eb7b3a05STakashi Sakamoto 162eb7b3a05STakashi Sakamoto /* 1631fc9522aSTakashi Sakamoto * 3.The device supports to switch source of clock by an usual way. 164eb7b3a05STakashi Sakamoto * Let's check input for 'Music Sub Unit Sync Input' plug. 165eb7b3a05STakashi Sakamoto */ 166eb7b3a05STakashi Sakamoto avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, 167eb7b3a05STakashi Sakamoto bebob->sync_input_plug); 168eb7b3a05STakashi Sakamoto err = avc_bridgeco_get_plug_input(bebob->unit, addr, input); 169eb7b3a05STakashi Sakamoto if (err < 0) { 170eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 171eb7b3a05STakashi Sakamoto "fail to get an input for MSU in plug %d: %d\n", 172eb7b3a05STakashi Sakamoto bebob->sync_input_plug, err); 173eb7b3a05STakashi Sakamoto goto end; 174eb7b3a05STakashi Sakamoto } 175eb7b3a05STakashi Sakamoto 176eb7b3a05STakashi Sakamoto /* 177eb7b3a05STakashi Sakamoto * If there are no input plugs, all of fields are 0xff. 178eb7b3a05STakashi Sakamoto * Here check the first field. This field is used for direction. 179eb7b3a05STakashi Sakamoto */ 180eb7b3a05STakashi Sakamoto if (input[0] == 0xff) { 181eb7b3a05STakashi Sakamoto *internal = true; 182eb7b3a05STakashi Sakamoto goto end; 183eb7b3a05STakashi Sakamoto } 184eb7b3a05STakashi Sakamoto 185eb7b3a05STakashi Sakamoto /* 186eb7b3a05STakashi Sakamoto * If source of clock is internal CSR, Music Sub Unit Sync Input is 187eb7b3a05STakashi Sakamoto * a destination of Music Sub Unit Sync Output. 188eb7b3a05STakashi Sakamoto */ 189eb7b3a05STakashi Sakamoto *internal = ((input[0] == AVC_BRIDGECO_PLUG_DIR_OUT) && 190eb7b3a05STakashi Sakamoto (input[1] == AVC_BRIDGECO_PLUG_MODE_SUBUNIT) && 191eb7b3a05STakashi Sakamoto (input[2] == 0x0c) && 192eb7b3a05STakashi Sakamoto (input[3] == 0x00)); 193eb7b3a05STakashi Sakamoto end: 194eb7b3a05STakashi Sakamoto return err; 195eb7b3a05STakashi Sakamoto } 196eb7b3a05STakashi Sakamoto 197eb7b3a05STakashi Sakamoto static unsigned int 198eb7b3a05STakashi Sakamoto map_data_channels(struct snd_bebob *bebob, struct amdtp_stream *s) 199eb7b3a05STakashi Sakamoto { 200eb7b3a05STakashi Sakamoto unsigned int sec, sections, ch, channels; 201eb7b3a05STakashi Sakamoto unsigned int pcm, midi, location; 202eb7b3a05STakashi Sakamoto unsigned int stm_pos, sec_loc, pos; 203eb7b3a05STakashi Sakamoto u8 *buf, addr[AVC_BRIDGECO_ADDR_BYTES], type; 204eb7b3a05STakashi Sakamoto enum avc_bridgeco_plug_dir dir; 205eb7b3a05STakashi Sakamoto int err; 206eb7b3a05STakashi Sakamoto 207eb7b3a05STakashi Sakamoto /* 208eb7b3a05STakashi Sakamoto * The length of return value of this command cannot be expected. Here 209eb7b3a05STakashi Sakamoto * use the maximum length of FCP. 210eb7b3a05STakashi Sakamoto */ 211eb7b3a05STakashi Sakamoto buf = kzalloc(256, GFP_KERNEL); 212eb7b3a05STakashi Sakamoto if (buf == NULL) 213eb7b3a05STakashi Sakamoto return -ENOMEM; 214eb7b3a05STakashi Sakamoto 215eb7b3a05STakashi Sakamoto if (s == &bebob->tx_stream) 216eb7b3a05STakashi Sakamoto dir = AVC_BRIDGECO_PLUG_DIR_OUT; 217eb7b3a05STakashi Sakamoto else 218eb7b3a05STakashi Sakamoto dir = AVC_BRIDGECO_PLUG_DIR_IN; 219eb7b3a05STakashi Sakamoto 220eb7b3a05STakashi Sakamoto avc_bridgeco_fill_unit_addr(addr, dir, AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); 221eb7b3a05STakashi Sakamoto err = avc_bridgeco_get_plug_ch_pos(bebob->unit, addr, buf, 256); 222eb7b3a05STakashi Sakamoto if (err < 0) { 223eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 224eb7b3a05STakashi Sakamoto "fail to get channel position for isoc %s plug 0: %d\n", 225eb7b3a05STakashi Sakamoto (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : "out", 226eb7b3a05STakashi Sakamoto err); 227eb7b3a05STakashi Sakamoto goto end; 228eb7b3a05STakashi Sakamoto } 229eb7b3a05STakashi Sakamoto pos = 0; 230eb7b3a05STakashi Sakamoto 231eb7b3a05STakashi Sakamoto /* positions in I/O buffer */ 232eb7b3a05STakashi Sakamoto pcm = 0; 233eb7b3a05STakashi Sakamoto midi = 0; 234eb7b3a05STakashi Sakamoto 235eb7b3a05STakashi Sakamoto /* the number of sections in AMDTP packet */ 236eb7b3a05STakashi Sakamoto sections = buf[pos++]; 237eb7b3a05STakashi Sakamoto 238eb7b3a05STakashi Sakamoto for (sec = 0; sec < sections; sec++) { 239eb7b3a05STakashi Sakamoto /* type of this section */ 240eb7b3a05STakashi Sakamoto avc_bridgeco_fill_unit_addr(addr, dir, 241eb7b3a05STakashi Sakamoto AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); 242eb7b3a05STakashi Sakamoto err = avc_bridgeco_get_plug_section_type(bebob->unit, addr, 243eb7b3a05STakashi Sakamoto sec, &type); 244eb7b3a05STakashi Sakamoto if (err < 0) { 245eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 246eb7b3a05STakashi Sakamoto "fail to get section type for isoc %s plug 0: %d\n", 247eb7b3a05STakashi Sakamoto (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : 248eb7b3a05STakashi Sakamoto "out", 249eb7b3a05STakashi Sakamoto err); 250eb7b3a05STakashi Sakamoto goto end; 251eb7b3a05STakashi Sakamoto } 252eb7b3a05STakashi Sakamoto /* NoType */ 253eb7b3a05STakashi Sakamoto if (type == 0xff) { 254eb7b3a05STakashi Sakamoto err = -ENOSYS; 255eb7b3a05STakashi Sakamoto goto end; 256eb7b3a05STakashi Sakamoto } 257eb7b3a05STakashi Sakamoto 258eb7b3a05STakashi Sakamoto /* the number of channels in this section */ 259eb7b3a05STakashi Sakamoto channels = buf[pos++]; 260eb7b3a05STakashi Sakamoto 261eb7b3a05STakashi Sakamoto for (ch = 0; ch < channels; ch++) { 262eb7b3a05STakashi Sakamoto /* position of this channel in AMDTP packet */ 263eb7b3a05STakashi Sakamoto stm_pos = buf[pos++] - 1; 264eb7b3a05STakashi Sakamoto /* location of this channel in this section */ 265eb7b3a05STakashi Sakamoto sec_loc = buf[pos++] - 1; 266eb7b3a05STakashi Sakamoto 2679076c22dSTakashi Sakamoto /* 2689076c22dSTakashi Sakamoto * Basically the number of location is within the 2699076c22dSTakashi Sakamoto * number of channels in this section. But some models 2709076c22dSTakashi Sakamoto * of M-Audio don't follow this. Its location for MIDI 2719076c22dSTakashi Sakamoto * is the position of MIDI channels in AMDTP packet. 2729076c22dSTakashi Sakamoto */ 2739076c22dSTakashi Sakamoto if (sec_loc >= channels) 2749076c22dSTakashi Sakamoto sec_loc = ch; 2759076c22dSTakashi Sakamoto 276eb7b3a05STakashi Sakamoto switch (type) { 277eb7b3a05STakashi Sakamoto /* for MIDI conformant data channel */ 278eb7b3a05STakashi Sakamoto case 0x0a: 279eb7b3a05STakashi Sakamoto /* AMDTP_MAX_CHANNELS_FOR_MIDI is 1. */ 280eb7b3a05STakashi Sakamoto if ((midi > 0) && (stm_pos != midi)) { 281eb7b3a05STakashi Sakamoto err = -ENOSYS; 282eb7b3a05STakashi Sakamoto goto end; 283eb7b3a05STakashi Sakamoto } 284eb7b3a05STakashi Sakamoto s->midi_position = stm_pos; 285eb7b3a05STakashi Sakamoto midi = stm_pos; 286eb7b3a05STakashi Sakamoto break; 287eb7b3a05STakashi Sakamoto /* for PCM data channel */ 288eb7b3a05STakashi Sakamoto case 0x01: /* Headphone */ 289eb7b3a05STakashi Sakamoto case 0x02: /* Microphone */ 290eb7b3a05STakashi Sakamoto case 0x03: /* Line */ 291eb7b3a05STakashi Sakamoto case 0x04: /* SPDIF */ 292eb7b3a05STakashi Sakamoto case 0x05: /* ADAT */ 293eb7b3a05STakashi Sakamoto case 0x06: /* TDIF */ 294eb7b3a05STakashi Sakamoto case 0x07: /* MADI */ 295eb7b3a05STakashi Sakamoto /* for undefined/changeable signal */ 296eb7b3a05STakashi Sakamoto case 0x08: /* Analog */ 297eb7b3a05STakashi Sakamoto case 0x09: /* Digital */ 298eb7b3a05STakashi Sakamoto default: 299eb7b3a05STakashi Sakamoto location = pcm + sec_loc; 300eb7b3a05STakashi Sakamoto if (location >= AMDTP_MAX_CHANNELS_FOR_PCM) { 301eb7b3a05STakashi Sakamoto err = -ENOSYS; 302eb7b3a05STakashi Sakamoto goto end; 303eb7b3a05STakashi Sakamoto } 304eb7b3a05STakashi Sakamoto s->pcm_positions[location] = stm_pos; 305eb7b3a05STakashi Sakamoto break; 306eb7b3a05STakashi Sakamoto } 307eb7b3a05STakashi Sakamoto } 308eb7b3a05STakashi Sakamoto 309eb7b3a05STakashi Sakamoto if (type != 0x0a) 310eb7b3a05STakashi Sakamoto pcm += channels; 311eb7b3a05STakashi Sakamoto else 312eb7b3a05STakashi Sakamoto midi += channels; 313eb7b3a05STakashi Sakamoto } 314eb7b3a05STakashi Sakamoto end: 315eb7b3a05STakashi Sakamoto kfree(buf); 316eb7b3a05STakashi Sakamoto return err; 317eb7b3a05STakashi Sakamoto } 318eb7b3a05STakashi Sakamoto 319eb7b3a05STakashi Sakamoto static int 320eb7b3a05STakashi Sakamoto init_both_connections(struct snd_bebob *bebob) 321eb7b3a05STakashi Sakamoto { 322eb7b3a05STakashi Sakamoto int err; 323eb7b3a05STakashi Sakamoto 324eb7b3a05STakashi Sakamoto err = cmp_connection_init(&bebob->in_conn, 325eb7b3a05STakashi Sakamoto bebob->unit, CMP_INPUT, 0); 326eb7b3a05STakashi Sakamoto if (err < 0) 327eb7b3a05STakashi Sakamoto goto end; 328eb7b3a05STakashi Sakamoto 329eb7b3a05STakashi Sakamoto err = cmp_connection_init(&bebob->out_conn, 330eb7b3a05STakashi Sakamoto bebob->unit, CMP_OUTPUT, 0); 331eb7b3a05STakashi Sakamoto if (err < 0) 332eb7b3a05STakashi Sakamoto cmp_connection_destroy(&bebob->in_conn); 333eb7b3a05STakashi Sakamoto end: 334eb7b3a05STakashi Sakamoto return err; 335eb7b3a05STakashi Sakamoto } 336eb7b3a05STakashi Sakamoto 337eb7b3a05STakashi Sakamoto static int 338eb7b3a05STakashi Sakamoto check_connection_used_by_others(struct snd_bebob *bebob, struct amdtp_stream *s) 339eb7b3a05STakashi Sakamoto { 340eb7b3a05STakashi Sakamoto struct cmp_connection *conn; 341eb7b3a05STakashi Sakamoto bool used; 342eb7b3a05STakashi Sakamoto int err; 343eb7b3a05STakashi Sakamoto 344eb7b3a05STakashi Sakamoto if (s == &bebob->tx_stream) 345eb7b3a05STakashi Sakamoto conn = &bebob->out_conn; 346eb7b3a05STakashi Sakamoto else 347eb7b3a05STakashi Sakamoto conn = &bebob->in_conn; 348eb7b3a05STakashi Sakamoto 349eb7b3a05STakashi Sakamoto err = cmp_connection_check_used(conn, &used); 350eb7b3a05STakashi Sakamoto if ((err >= 0) && used && !amdtp_stream_running(s)) { 351eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 352eb7b3a05STakashi Sakamoto "Connection established by others: %cPCR[%d]\n", 353eb7b3a05STakashi Sakamoto (conn->direction == CMP_OUTPUT) ? 'o' : 'i', 354eb7b3a05STakashi Sakamoto conn->pcr_index); 355eb7b3a05STakashi Sakamoto err = -EBUSY; 356eb7b3a05STakashi Sakamoto } 357eb7b3a05STakashi Sakamoto 358eb7b3a05STakashi Sakamoto return err; 359eb7b3a05STakashi Sakamoto } 360eb7b3a05STakashi Sakamoto 361eb7b3a05STakashi Sakamoto static int 362eb7b3a05STakashi Sakamoto make_both_connections(struct snd_bebob *bebob, unsigned int rate) 363eb7b3a05STakashi Sakamoto { 364b6bc8123STakashi Sakamoto int index, pcm_channels, midi_channels, err = 0; 365b6bc8123STakashi Sakamoto 366b6bc8123STakashi Sakamoto if (bebob->connected) 367b6bc8123STakashi Sakamoto goto end; 368eb7b3a05STakashi Sakamoto 369eb7b3a05STakashi Sakamoto /* confirm params for both streams */ 370eb7b3a05STakashi Sakamoto index = get_formation_index(rate); 371eb7b3a05STakashi Sakamoto pcm_channels = bebob->tx_stream_formations[index].pcm; 372eb7b3a05STakashi Sakamoto midi_channels = bebob->tx_stream_formations[index].midi; 373eb7b3a05STakashi Sakamoto amdtp_stream_set_parameters(&bebob->tx_stream, 374eb7b3a05STakashi Sakamoto rate, pcm_channels, midi_channels * 8); 375eb7b3a05STakashi Sakamoto pcm_channels = bebob->rx_stream_formations[index].pcm; 376eb7b3a05STakashi Sakamoto midi_channels = bebob->rx_stream_formations[index].midi; 377eb7b3a05STakashi Sakamoto amdtp_stream_set_parameters(&bebob->rx_stream, 378eb7b3a05STakashi Sakamoto rate, pcm_channels, midi_channels * 8); 379eb7b3a05STakashi Sakamoto 380eb7b3a05STakashi Sakamoto /* establish connections for both streams */ 381eb7b3a05STakashi Sakamoto err = cmp_connection_establish(&bebob->out_conn, 382eb7b3a05STakashi Sakamoto amdtp_stream_get_max_payload(&bebob->tx_stream)); 383eb7b3a05STakashi Sakamoto if (err < 0) 384eb7b3a05STakashi Sakamoto goto end; 385eb7b3a05STakashi Sakamoto err = cmp_connection_establish(&bebob->in_conn, 386eb7b3a05STakashi Sakamoto amdtp_stream_get_max_payload(&bebob->rx_stream)); 387b6bc8123STakashi Sakamoto if (err < 0) { 388eb7b3a05STakashi Sakamoto cmp_connection_break(&bebob->out_conn); 389b6bc8123STakashi Sakamoto goto end; 390b6bc8123STakashi Sakamoto } 391b6bc8123STakashi Sakamoto 392b6bc8123STakashi Sakamoto bebob->connected = true; 393eb7b3a05STakashi Sakamoto end: 394eb7b3a05STakashi Sakamoto return err; 395eb7b3a05STakashi Sakamoto } 396eb7b3a05STakashi Sakamoto 397eb7b3a05STakashi Sakamoto static void 398eb7b3a05STakashi Sakamoto break_both_connections(struct snd_bebob *bebob) 399eb7b3a05STakashi Sakamoto { 400eb7b3a05STakashi Sakamoto cmp_connection_break(&bebob->in_conn); 401eb7b3a05STakashi Sakamoto cmp_connection_break(&bebob->out_conn); 402b6bc8123STakashi Sakamoto 403b6bc8123STakashi Sakamoto bebob->connected = false; 4043149ac48STakashi Sakamoto 4053149ac48STakashi Sakamoto /* These models seems to be in transition state for a longer time. */ 4063149ac48STakashi Sakamoto if (bebob->maudio_special_quirk != NULL) 4073149ac48STakashi Sakamoto msleep(200); 408eb7b3a05STakashi Sakamoto } 409eb7b3a05STakashi Sakamoto 410eb7b3a05STakashi Sakamoto static void 411eb7b3a05STakashi Sakamoto destroy_both_connections(struct snd_bebob *bebob) 412eb7b3a05STakashi Sakamoto { 413eb7b3a05STakashi Sakamoto cmp_connection_destroy(&bebob->in_conn); 414eb7b3a05STakashi Sakamoto cmp_connection_destroy(&bebob->out_conn); 415eb7b3a05STakashi Sakamoto } 416eb7b3a05STakashi Sakamoto 417eb7b3a05STakashi Sakamoto static int 418eb7b3a05STakashi Sakamoto get_sync_mode(struct snd_bebob *bebob, enum cip_flags *sync_mode) 419eb7b3a05STakashi Sakamoto { 420eb7b3a05STakashi Sakamoto /* currently this module doesn't support SYT-Match mode */ 421eb7b3a05STakashi Sakamoto *sync_mode = CIP_SYNC_TO_DEVICE; 422eb7b3a05STakashi Sakamoto return 0; 423eb7b3a05STakashi Sakamoto } 424eb7b3a05STakashi Sakamoto 425eb7b3a05STakashi Sakamoto static int 426eb7b3a05STakashi Sakamoto start_stream(struct snd_bebob *bebob, struct amdtp_stream *stream, 427eb7b3a05STakashi Sakamoto unsigned int rate) 428eb7b3a05STakashi Sakamoto { 429eb7b3a05STakashi Sakamoto struct cmp_connection *conn; 430eb7b3a05STakashi Sakamoto int err = 0; 431eb7b3a05STakashi Sakamoto 432eb7b3a05STakashi Sakamoto if (stream == &bebob->rx_stream) 433eb7b3a05STakashi Sakamoto conn = &bebob->in_conn; 434eb7b3a05STakashi Sakamoto else 435eb7b3a05STakashi Sakamoto conn = &bebob->out_conn; 436eb7b3a05STakashi Sakamoto 437eb7b3a05STakashi Sakamoto /* channel mapping */ 4383149ac48STakashi Sakamoto if (bebob->maudio_special_quirk == NULL) { 439eb7b3a05STakashi Sakamoto err = map_data_channels(bebob, stream); 440eb7b3a05STakashi Sakamoto if (err < 0) 441eb7b3a05STakashi Sakamoto goto end; 4423149ac48STakashi Sakamoto } 443eb7b3a05STakashi Sakamoto 444eb7b3a05STakashi Sakamoto /* start amdtp stream */ 445eb7b3a05STakashi Sakamoto err = amdtp_stream_start(stream, 446eb7b3a05STakashi Sakamoto conn->resources.channel, 447eb7b3a05STakashi Sakamoto conn->speed); 448eb7b3a05STakashi Sakamoto end: 449eb7b3a05STakashi Sakamoto return err; 450eb7b3a05STakashi Sakamoto } 451eb7b3a05STakashi Sakamoto 452eb7b3a05STakashi Sakamoto int snd_bebob_stream_init_duplex(struct snd_bebob *bebob) 453eb7b3a05STakashi Sakamoto { 454eb7b3a05STakashi Sakamoto int err; 455eb7b3a05STakashi Sakamoto 456eb7b3a05STakashi Sakamoto err = init_both_connections(bebob); 457eb7b3a05STakashi Sakamoto if (err < 0) 458eb7b3a05STakashi Sakamoto goto end; 459eb7b3a05STakashi Sakamoto 460eb7b3a05STakashi Sakamoto err = amdtp_stream_init(&bebob->tx_stream, bebob->unit, 461eb7b3a05STakashi Sakamoto AMDTP_IN_STREAM, CIP_BLOCKING); 462eb7b3a05STakashi Sakamoto if (err < 0) { 463eb7b3a05STakashi Sakamoto amdtp_stream_destroy(&bebob->tx_stream); 464eb7b3a05STakashi Sakamoto destroy_both_connections(bebob); 465eb7b3a05STakashi Sakamoto goto end; 466eb7b3a05STakashi Sakamoto } 467b6bc8123STakashi Sakamoto /* See comments in next function */ 468b6bc8123STakashi Sakamoto init_completion(&bebob->bus_reset); 469b6bc8123STakashi Sakamoto bebob->tx_stream.flags |= CIP_SKIP_INIT_DBC_CHECK; 4709d59124cSTakashi Sakamoto /* 4719d59124cSTakashi Sakamoto * At high sampling rate, M-Audio special firmware transmits empty 4729d59124cSTakashi Sakamoto * packet with the value of dbc incremented by 8 but the others are 4739d59124cSTakashi Sakamoto * valid to IEC 61883-1. 4749d59124cSTakashi Sakamoto */ 4759d59124cSTakashi Sakamoto if (bebob->maudio_special_quirk) 4769d59124cSTakashi Sakamoto bebob->tx_stream.flags |= CIP_EMPTY_HAS_WRONG_DBC; 477eb7b3a05STakashi Sakamoto 478eb7b3a05STakashi Sakamoto err = amdtp_stream_init(&bebob->rx_stream, bebob->unit, 479eb7b3a05STakashi Sakamoto AMDTP_OUT_STREAM, CIP_BLOCKING); 480eb7b3a05STakashi Sakamoto if (err < 0) { 481eb7b3a05STakashi Sakamoto amdtp_stream_destroy(&bebob->tx_stream); 482eb7b3a05STakashi Sakamoto amdtp_stream_destroy(&bebob->rx_stream); 483eb7b3a05STakashi Sakamoto destroy_both_connections(bebob); 484eb7b3a05STakashi Sakamoto } 485eb7b3a05STakashi Sakamoto end: 486eb7b3a05STakashi Sakamoto return err; 487eb7b3a05STakashi Sakamoto } 488eb7b3a05STakashi Sakamoto 4894a286d55STakashi Sakamoto int snd_bebob_stream_start_duplex(struct snd_bebob *bebob, unsigned int rate) 490eb7b3a05STakashi Sakamoto { 4911fc9522aSTakashi Sakamoto struct snd_bebob_rate_spec *rate_spec = bebob->spec->rate; 492eb7b3a05STakashi Sakamoto struct amdtp_stream *master, *slave; 493eb7b3a05STakashi Sakamoto atomic_t *slave_substreams; 494eb7b3a05STakashi Sakamoto enum cip_flags sync_mode; 495eb7b3a05STakashi Sakamoto unsigned int curr_rate; 496b6bc8123STakashi Sakamoto bool updated = false; 497eb7b3a05STakashi Sakamoto int err = 0; 498eb7b3a05STakashi Sakamoto 499b6bc8123STakashi Sakamoto /* 500b6bc8123STakashi Sakamoto * Normal BeBoB firmware has a quirk at bus reset to transmits packets 501b6bc8123STakashi Sakamoto * with discontinuous value in dbc field. 502b6bc8123STakashi Sakamoto * 503b6bc8123STakashi Sakamoto * This 'struct completion' is used to call .update() at first to update 504b6bc8123STakashi Sakamoto * connections/streams. Next following codes handle streaming error. 505b6bc8123STakashi Sakamoto */ 506b6bc8123STakashi Sakamoto if (amdtp_streaming_error(&bebob->tx_stream)) { 507b6bc8123STakashi Sakamoto if (completion_done(&bebob->bus_reset)) 508b6bc8123STakashi Sakamoto reinit_completion(&bebob->bus_reset); 509b6bc8123STakashi Sakamoto 510b6bc8123STakashi Sakamoto updated = (wait_for_completion_interruptible_timeout( 511b6bc8123STakashi Sakamoto &bebob->bus_reset, 512b6bc8123STakashi Sakamoto msecs_to_jiffies(FW_ISO_RESOURCE_DELAY)) > 0); 513b6bc8123STakashi Sakamoto } 514b6bc8123STakashi Sakamoto 515eb7b3a05STakashi Sakamoto mutex_lock(&bebob->mutex); 516eb7b3a05STakashi Sakamoto 517eb7b3a05STakashi Sakamoto /* Need no substreams */ 518eb7b3a05STakashi Sakamoto if (atomic_read(&bebob->playback_substreams) == 0 && 519eb7b3a05STakashi Sakamoto atomic_read(&bebob->capture_substreams) == 0) 520eb7b3a05STakashi Sakamoto goto end; 521eb7b3a05STakashi Sakamoto 522eb7b3a05STakashi Sakamoto err = get_sync_mode(bebob, &sync_mode); 523eb7b3a05STakashi Sakamoto if (err < 0) 524eb7b3a05STakashi Sakamoto goto end; 525eb7b3a05STakashi Sakamoto if (sync_mode == CIP_SYNC_TO_DEVICE) { 526eb7b3a05STakashi Sakamoto master = &bebob->tx_stream; 527eb7b3a05STakashi Sakamoto slave = &bebob->rx_stream; 528eb7b3a05STakashi Sakamoto slave_substreams = &bebob->playback_substreams; 529eb7b3a05STakashi Sakamoto } else { 530eb7b3a05STakashi Sakamoto master = &bebob->rx_stream; 531eb7b3a05STakashi Sakamoto slave = &bebob->tx_stream; 532eb7b3a05STakashi Sakamoto slave_substreams = &bebob->capture_substreams; 533eb7b3a05STakashi Sakamoto } 534eb7b3a05STakashi Sakamoto 535eb7b3a05STakashi Sakamoto /* 536eb7b3a05STakashi Sakamoto * Considering JACK/FFADO streaming: 537eb7b3a05STakashi Sakamoto * TODO: This can be removed hwdep functionality becomes popular. 538eb7b3a05STakashi Sakamoto */ 539eb7b3a05STakashi Sakamoto err = check_connection_used_by_others(bebob, master); 540eb7b3a05STakashi Sakamoto if (err < 0) 541eb7b3a05STakashi Sakamoto goto end; 542eb7b3a05STakashi Sakamoto 543b6bc8123STakashi Sakamoto /* 544b6bc8123STakashi Sakamoto * packet queueing error or detecting discontinuity 545b6bc8123STakashi Sakamoto * 546b6bc8123STakashi Sakamoto * At bus reset, connections should not be broken here. So streams need 547b6bc8123STakashi Sakamoto * to be re-started. This is a reason to use SKIP_INIT_DBC_CHECK flag. 548b6bc8123STakashi Sakamoto */ 549b6bc8123STakashi Sakamoto if (amdtp_streaming_error(master)) 550eb7b3a05STakashi Sakamoto amdtp_stream_stop(master); 551eb7b3a05STakashi Sakamoto if (amdtp_streaming_error(slave)) 552eb7b3a05STakashi Sakamoto amdtp_stream_stop(slave); 553b6bc8123STakashi Sakamoto if (!updated && 554b6bc8123STakashi Sakamoto !amdtp_stream_running(master) && !amdtp_stream_running(slave)) 555b6bc8123STakashi Sakamoto break_both_connections(bebob); 556eb7b3a05STakashi Sakamoto 557eb7b3a05STakashi Sakamoto /* stop streams if rate is different */ 5581fc9522aSTakashi Sakamoto err = rate_spec->get(bebob, &curr_rate); 559eb7b3a05STakashi Sakamoto if (err < 0) { 560eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 561eb7b3a05STakashi Sakamoto "fail to get sampling rate: %d\n", err); 562eb7b3a05STakashi Sakamoto goto end; 563eb7b3a05STakashi Sakamoto } 564eb7b3a05STakashi Sakamoto if (rate == 0) 565eb7b3a05STakashi Sakamoto rate = curr_rate; 566eb7b3a05STakashi Sakamoto if (rate != curr_rate) { 567eb7b3a05STakashi Sakamoto amdtp_stream_stop(master); 568eb7b3a05STakashi Sakamoto amdtp_stream_stop(slave); 569eb7b3a05STakashi Sakamoto break_both_connections(bebob); 570eb7b3a05STakashi Sakamoto } 571eb7b3a05STakashi Sakamoto 572eb7b3a05STakashi Sakamoto /* master should be always running */ 573eb7b3a05STakashi Sakamoto if (!amdtp_stream_running(master)) { 574eb7b3a05STakashi Sakamoto amdtp_stream_set_sync(sync_mode, master, slave); 575eb7b3a05STakashi Sakamoto bebob->master = master; 576eb7b3a05STakashi Sakamoto 577eb7b3a05STakashi Sakamoto /* 578eb7b3a05STakashi Sakamoto * NOTE: 579eb7b3a05STakashi Sakamoto * If establishing connections at first, Yamaha GO46 580eb7b3a05STakashi Sakamoto * (and maybe Terratec X24) don't generate sound. 5813149ac48STakashi Sakamoto * 5823149ac48STakashi Sakamoto * For firmware customized by M-Audio, refer to next NOTE. 583eb7b3a05STakashi Sakamoto */ 5843149ac48STakashi Sakamoto if (bebob->maudio_special_quirk == NULL) { 5851fc9522aSTakashi Sakamoto err = rate_spec->set(bebob, rate); 586eb7b3a05STakashi Sakamoto if (err < 0) { 587eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 588eb7b3a05STakashi Sakamoto "fail to set sampling rate: %d\n", 589eb7b3a05STakashi Sakamoto err); 590eb7b3a05STakashi Sakamoto goto end; 591eb7b3a05STakashi Sakamoto } 5923149ac48STakashi Sakamoto } 593eb7b3a05STakashi Sakamoto 594eb7b3a05STakashi Sakamoto err = make_both_connections(bebob, rate); 595eb7b3a05STakashi Sakamoto if (err < 0) 596eb7b3a05STakashi Sakamoto goto end; 597eb7b3a05STakashi Sakamoto 598eb7b3a05STakashi Sakamoto err = start_stream(bebob, master, rate); 599eb7b3a05STakashi Sakamoto if (err < 0) { 600eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 601eb7b3a05STakashi Sakamoto "fail to run AMDTP master stream:%d\n", err); 602eb7b3a05STakashi Sakamoto break_both_connections(bebob); 603eb7b3a05STakashi Sakamoto goto end; 604eb7b3a05STakashi Sakamoto } 605eb7b3a05STakashi Sakamoto 6063149ac48STakashi Sakamoto /* 6073149ac48STakashi Sakamoto * NOTE: 6083149ac48STakashi Sakamoto * The firmware customized by M-Audio uses these commands to 6093149ac48STakashi Sakamoto * start transmitting stream. This is not usual way. 6103149ac48STakashi Sakamoto */ 6113149ac48STakashi Sakamoto if (bebob->maudio_special_quirk != NULL) { 6123149ac48STakashi Sakamoto err = rate_spec->set(bebob, rate); 6133149ac48STakashi Sakamoto if (err < 0) { 6143149ac48STakashi Sakamoto dev_err(&bebob->unit->device, 6153149ac48STakashi Sakamoto "fail to ensure sampling rate: %d\n", 6163149ac48STakashi Sakamoto err); 6173149ac48STakashi Sakamoto amdtp_stream_stop(master); 6183149ac48STakashi Sakamoto break_both_connections(bebob); 6193149ac48STakashi Sakamoto goto end; 6203149ac48STakashi Sakamoto } 6213149ac48STakashi Sakamoto } 6223149ac48STakashi Sakamoto 623eb7b3a05STakashi Sakamoto /* wait first callback */ 624eb7b3a05STakashi Sakamoto if (!amdtp_stream_wait_callback(master, CALLBACK_TIMEOUT)) { 625eb7b3a05STakashi Sakamoto amdtp_stream_stop(master); 626eb7b3a05STakashi Sakamoto break_both_connections(bebob); 627eb7b3a05STakashi Sakamoto err = -ETIMEDOUT; 628eb7b3a05STakashi Sakamoto goto end; 629eb7b3a05STakashi Sakamoto } 630eb7b3a05STakashi Sakamoto } 631eb7b3a05STakashi Sakamoto 632eb7b3a05STakashi Sakamoto /* start slave if needed */ 633eb7b3a05STakashi Sakamoto if (atomic_read(slave_substreams) > 0 && !amdtp_stream_running(slave)) { 634eb7b3a05STakashi Sakamoto err = start_stream(bebob, slave, rate); 635eb7b3a05STakashi Sakamoto if (err < 0) { 636eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 637eb7b3a05STakashi Sakamoto "fail to run AMDTP slave stream:%d\n", err); 638eb7b3a05STakashi Sakamoto amdtp_stream_stop(master); 639eb7b3a05STakashi Sakamoto break_both_connections(bebob); 640eb7b3a05STakashi Sakamoto goto end; 641eb7b3a05STakashi Sakamoto } 642eb7b3a05STakashi Sakamoto 643eb7b3a05STakashi Sakamoto /* wait first callback */ 644eb7b3a05STakashi Sakamoto if (!amdtp_stream_wait_callback(slave, CALLBACK_TIMEOUT)) { 645eb7b3a05STakashi Sakamoto amdtp_stream_stop(slave); 646eb7b3a05STakashi Sakamoto amdtp_stream_stop(master); 647eb7b3a05STakashi Sakamoto break_both_connections(bebob); 648eb7b3a05STakashi Sakamoto err = -ETIMEDOUT; 649eb7b3a05STakashi Sakamoto } 650eb7b3a05STakashi Sakamoto } 651eb7b3a05STakashi Sakamoto end: 652eb7b3a05STakashi Sakamoto mutex_unlock(&bebob->mutex); 653eb7b3a05STakashi Sakamoto return err; 654eb7b3a05STakashi Sakamoto } 655eb7b3a05STakashi Sakamoto 656eb7b3a05STakashi Sakamoto void snd_bebob_stream_stop_duplex(struct snd_bebob *bebob) 657eb7b3a05STakashi Sakamoto { 658eb7b3a05STakashi Sakamoto struct amdtp_stream *master, *slave; 659eb7b3a05STakashi Sakamoto atomic_t *master_substreams, *slave_substreams; 660eb7b3a05STakashi Sakamoto 661eb7b3a05STakashi Sakamoto if (bebob->master == &bebob->rx_stream) { 662eb7b3a05STakashi Sakamoto slave = &bebob->tx_stream; 663eb7b3a05STakashi Sakamoto master = &bebob->rx_stream; 664eb7b3a05STakashi Sakamoto slave_substreams = &bebob->capture_substreams; 665eb7b3a05STakashi Sakamoto master_substreams = &bebob->playback_substreams; 666eb7b3a05STakashi Sakamoto } else { 667eb7b3a05STakashi Sakamoto slave = &bebob->rx_stream; 668eb7b3a05STakashi Sakamoto master = &bebob->tx_stream; 669eb7b3a05STakashi Sakamoto slave_substreams = &bebob->playback_substreams; 670eb7b3a05STakashi Sakamoto master_substreams = &bebob->capture_substreams; 671eb7b3a05STakashi Sakamoto } 672eb7b3a05STakashi Sakamoto 673c6e5e741STakashi Sakamoto mutex_lock(&bebob->mutex); 674c6e5e741STakashi Sakamoto 675eb7b3a05STakashi Sakamoto if (atomic_read(slave_substreams) == 0) { 676eb7b3a05STakashi Sakamoto amdtp_stream_pcm_abort(slave); 677eb7b3a05STakashi Sakamoto amdtp_stream_stop(slave); 678eb7b3a05STakashi Sakamoto 679eb7b3a05STakashi Sakamoto if (atomic_read(master_substreams) == 0) { 680eb7b3a05STakashi Sakamoto amdtp_stream_pcm_abort(master); 681eb7b3a05STakashi Sakamoto amdtp_stream_stop(master); 682eb7b3a05STakashi Sakamoto break_both_connections(bebob); 683eb7b3a05STakashi Sakamoto } 684eb7b3a05STakashi Sakamoto } 685eb7b3a05STakashi Sakamoto 686eb7b3a05STakashi Sakamoto mutex_unlock(&bebob->mutex); 687eb7b3a05STakashi Sakamoto } 688eb7b3a05STakashi Sakamoto 689eb7b3a05STakashi Sakamoto void snd_bebob_stream_update_duplex(struct snd_bebob *bebob) 690eb7b3a05STakashi Sakamoto { 691eb7b3a05STakashi Sakamoto /* vs. XRUN recovery due to discontinuity at bus reset */ 692eb7b3a05STakashi Sakamoto mutex_lock(&bebob->mutex); 693eb7b3a05STakashi Sakamoto 694eb7b3a05STakashi Sakamoto if ((cmp_connection_update(&bebob->in_conn) < 0) || 695eb7b3a05STakashi Sakamoto (cmp_connection_update(&bebob->out_conn) < 0)) { 696eb7b3a05STakashi Sakamoto amdtp_stream_pcm_abort(&bebob->rx_stream); 697eb7b3a05STakashi Sakamoto amdtp_stream_pcm_abort(&bebob->tx_stream); 698eb7b3a05STakashi Sakamoto amdtp_stream_stop(&bebob->rx_stream); 699eb7b3a05STakashi Sakamoto amdtp_stream_stop(&bebob->tx_stream); 700eb7b3a05STakashi Sakamoto break_both_connections(bebob); 701eb7b3a05STakashi Sakamoto } else { 702eb7b3a05STakashi Sakamoto amdtp_stream_update(&bebob->rx_stream); 703eb7b3a05STakashi Sakamoto amdtp_stream_update(&bebob->tx_stream); 704eb7b3a05STakashi Sakamoto } 705eb7b3a05STakashi Sakamoto 706b6bc8123STakashi Sakamoto /* wake up stream_start_duplex() */ 707b6bc8123STakashi Sakamoto if (!completion_done(&bebob->bus_reset)) 708b6bc8123STakashi Sakamoto complete_all(&bebob->bus_reset); 709b6bc8123STakashi Sakamoto 710eb7b3a05STakashi Sakamoto mutex_unlock(&bebob->mutex); 711eb7b3a05STakashi Sakamoto } 712eb7b3a05STakashi Sakamoto 713d23c2cc4STakashi Sakamoto /* 714d23c2cc4STakashi Sakamoto * This function should be called before starting streams or after stopping 715d23c2cc4STakashi Sakamoto * streams. 716d23c2cc4STakashi Sakamoto */ 717eb7b3a05STakashi Sakamoto void snd_bebob_stream_destroy_duplex(struct snd_bebob *bebob) 718eb7b3a05STakashi Sakamoto { 719eb7b3a05STakashi Sakamoto mutex_lock(&bebob->mutex); 720eb7b3a05STakashi Sakamoto 721eb7b3a05STakashi Sakamoto amdtp_stream_destroy(&bebob->rx_stream); 722eb7b3a05STakashi Sakamoto amdtp_stream_destroy(&bebob->tx_stream); 723eb7b3a05STakashi Sakamoto 724eb7b3a05STakashi Sakamoto destroy_both_connections(bebob); 725eb7b3a05STakashi Sakamoto 726eb7b3a05STakashi Sakamoto mutex_unlock(&bebob->mutex); 727eb7b3a05STakashi Sakamoto } 728eb7b3a05STakashi Sakamoto 729eb7b3a05STakashi Sakamoto /* 730eb7b3a05STakashi Sakamoto * See: Table 50: Extended Stream Format Info Format Hierarchy Level 2’ 731eb7b3a05STakashi Sakamoto * in Additional AVC commands (Nov 2003, BridgeCo) 732eb7b3a05STakashi Sakamoto * Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005 733eb7b3a05STakashi Sakamoto */ 734eb7b3a05STakashi Sakamoto static int 735eb7b3a05STakashi Sakamoto parse_stream_formation(u8 *buf, unsigned int len, 736eb7b3a05STakashi Sakamoto struct snd_bebob_stream_formation *formation) 737eb7b3a05STakashi Sakamoto { 738eb7b3a05STakashi Sakamoto unsigned int i, e, channels, format; 739eb7b3a05STakashi Sakamoto 740eb7b3a05STakashi Sakamoto /* 741eb7b3a05STakashi Sakamoto * this module can support a hierarchy combination that: 742eb7b3a05STakashi Sakamoto * Root: Audio and Music (0x90) 743eb7b3a05STakashi Sakamoto * Level 1: AM824 Compound (0x40) 744eb7b3a05STakashi Sakamoto */ 745eb7b3a05STakashi Sakamoto if ((buf[0] != 0x90) || (buf[1] != 0x40)) 746eb7b3a05STakashi Sakamoto return -ENOSYS; 747eb7b3a05STakashi Sakamoto 748eb7b3a05STakashi Sakamoto /* check sampling rate */ 749eb7b3a05STakashi Sakamoto for (i = 0; i < ARRAY_SIZE(bridgeco_freq_table); i++) { 750eb7b3a05STakashi Sakamoto if (buf[2] == bridgeco_freq_table[i]) 751eb7b3a05STakashi Sakamoto break; 752eb7b3a05STakashi Sakamoto } 75333a5f989SDan Carpenter if (i == ARRAY_SIZE(bridgeco_freq_table)) 754eb7b3a05STakashi Sakamoto return -ENOSYS; 755eb7b3a05STakashi Sakamoto 756eb7b3a05STakashi Sakamoto /* Avoid double count by different entries for the same rate. */ 757eb7b3a05STakashi Sakamoto memset(&formation[i], 0, sizeof(struct snd_bebob_stream_formation)); 758eb7b3a05STakashi Sakamoto 759eb7b3a05STakashi Sakamoto for (e = 0; e < buf[4]; e++) { 760eb7b3a05STakashi Sakamoto channels = buf[5 + e * 2]; 761eb7b3a05STakashi Sakamoto format = buf[6 + e * 2]; 762eb7b3a05STakashi Sakamoto 763eb7b3a05STakashi Sakamoto switch (format) { 76451fa31d4STakashi Sakamoto /* IEC 60958 Conformant, currently handled as MBLA */ 765eb7b3a05STakashi Sakamoto case 0x00: 766eb7b3a05STakashi Sakamoto /* Multi bit linear audio */ 767eb7b3a05STakashi Sakamoto case 0x06: /* Raw */ 768eb7b3a05STakashi Sakamoto formation[i].pcm += channels; 769eb7b3a05STakashi Sakamoto break; 770eb7b3a05STakashi Sakamoto /* MIDI Conformant */ 771eb7b3a05STakashi Sakamoto case 0x0d: 772eb7b3a05STakashi Sakamoto formation[i].midi += channels; 773eb7b3a05STakashi Sakamoto break; 774eb7b3a05STakashi Sakamoto /* IEC 61937-3 to 7 */ 775eb7b3a05STakashi Sakamoto case 0x01: 776eb7b3a05STakashi Sakamoto case 0x02: 777eb7b3a05STakashi Sakamoto case 0x03: 778eb7b3a05STakashi Sakamoto case 0x04: 779eb7b3a05STakashi Sakamoto case 0x05: 780eb7b3a05STakashi Sakamoto /* Multi bit linear audio */ 781eb7b3a05STakashi Sakamoto case 0x07: /* DVD-Audio */ 782eb7b3a05STakashi Sakamoto case 0x0c: /* High Precision */ 783eb7b3a05STakashi Sakamoto /* One Bit Audio */ 784eb7b3a05STakashi Sakamoto case 0x08: /* (Plain) Raw */ 785eb7b3a05STakashi Sakamoto case 0x09: /* (Plain) SACD */ 786eb7b3a05STakashi Sakamoto case 0x0a: /* (Encoded) Raw */ 787eb7b3a05STakashi Sakamoto case 0x0b: /* (Encoded) SACD */ 788eb7b3a05STakashi Sakamoto /* Synchronization Stream (Stereo Raw audio) */ 789eb7b3a05STakashi Sakamoto case 0x40: 790eb7b3a05STakashi Sakamoto /* Don't care */ 791eb7b3a05STakashi Sakamoto case 0xff: 792eb7b3a05STakashi Sakamoto default: 793eb7b3a05STakashi Sakamoto return -ENOSYS; /* not supported */ 794eb7b3a05STakashi Sakamoto } 795eb7b3a05STakashi Sakamoto } 796eb7b3a05STakashi Sakamoto 797eb7b3a05STakashi Sakamoto if (formation[i].pcm > AMDTP_MAX_CHANNELS_FOR_PCM || 798eb7b3a05STakashi Sakamoto formation[i].midi > AMDTP_MAX_CHANNELS_FOR_MIDI) 799eb7b3a05STakashi Sakamoto return -ENOSYS; 800eb7b3a05STakashi Sakamoto 801eb7b3a05STakashi Sakamoto return 0; 802eb7b3a05STakashi Sakamoto } 803eb7b3a05STakashi Sakamoto 804eb7b3a05STakashi Sakamoto static int 805eb7b3a05STakashi Sakamoto fill_stream_formations(struct snd_bebob *bebob, enum avc_bridgeco_plug_dir dir, 806eb7b3a05STakashi Sakamoto unsigned short pid) 807eb7b3a05STakashi Sakamoto { 808eb7b3a05STakashi Sakamoto u8 *buf; 809eb7b3a05STakashi Sakamoto struct snd_bebob_stream_formation *formations; 810eb7b3a05STakashi Sakamoto unsigned int len, eid; 811eb7b3a05STakashi Sakamoto u8 addr[AVC_BRIDGECO_ADDR_BYTES]; 812eb7b3a05STakashi Sakamoto int err; 813eb7b3a05STakashi Sakamoto 814eb7b3a05STakashi Sakamoto buf = kmalloc(FORMAT_MAXIMUM_LENGTH, GFP_KERNEL); 815eb7b3a05STakashi Sakamoto if (buf == NULL) 816eb7b3a05STakashi Sakamoto return -ENOMEM; 817eb7b3a05STakashi Sakamoto 818eb7b3a05STakashi Sakamoto if (dir == AVC_BRIDGECO_PLUG_DIR_IN) 819eb7b3a05STakashi Sakamoto formations = bebob->rx_stream_formations; 820eb7b3a05STakashi Sakamoto else 821eb7b3a05STakashi Sakamoto formations = bebob->tx_stream_formations; 822eb7b3a05STakashi Sakamoto 823eb7b3a05STakashi Sakamoto for (eid = 0; eid < SND_BEBOB_STRM_FMT_ENTRIES; eid++) { 824eb7b3a05STakashi Sakamoto len = FORMAT_MAXIMUM_LENGTH; 825eb7b3a05STakashi Sakamoto avc_bridgeco_fill_unit_addr(addr, dir, 826eb7b3a05STakashi Sakamoto AVC_BRIDGECO_PLUG_UNIT_ISOC, pid); 827eb7b3a05STakashi Sakamoto err = avc_bridgeco_get_plug_strm_fmt(bebob->unit, addr, buf, 828eb7b3a05STakashi Sakamoto &len, eid); 829eb7b3a05STakashi Sakamoto /* No entries remained. */ 830eb7b3a05STakashi Sakamoto if (err == -EINVAL && eid > 0) { 831eb7b3a05STakashi Sakamoto err = 0; 832eb7b3a05STakashi Sakamoto break; 833eb7b3a05STakashi Sakamoto } else if (err < 0) { 834eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 835eb7b3a05STakashi Sakamoto "fail to get stream format %d for isoc %s plug %d:%d\n", 836eb7b3a05STakashi Sakamoto eid, 837eb7b3a05STakashi Sakamoto (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : 838eb7b3a05STakashi Sakamoto "out", 839eb7b3a05STakashi Sakamoto pid, err); 840eb7b3a05STakashi Sakamoto break; 841eb7b3a05STakashi Sakamoto } 842eb7b3a05STakashi Sakamoto 843eb7b3a05STakashi Sakamoto err = parse_stream_formation(buf, len, formations); 844eb7b3a05STakashi Sakamoto if (err < 0) 845eb7b3a05STakashi Sakamoto break; 846eb7b3a05STakashi Sakamoto } 847eb7b3a05STakashi Sakamoto 848eb7b3a05STakashi Sakamoto kfree(buf); 849eb7b3a05STakashi Sakamoto return err; 850eb7b3a05STakashi Sakamoto } 851eb7b3a05STakashi Sakamoto 852eb7b3a05STakashi Sakamoto static int 853eb7b3a05STakashi Sakamoto seek_msu_sync_input_plug(struct snd_bebob *bebob) 854eb7b3a05STakashi Sakamoto { 855eb7b3a05STakashi Sakamoto u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES]; 856a6b598bfSTakashi Sakamoto unsigned int i; 857a6b598bfSTakashi Sakamoto enum avc_bridgeco_plug_type type; 858eb7b3a05STakashi Sakamoto int err; 859eb7b3a05STakashi Sakamoto 860eb7b3a05STakashi Sakamoto /* Get the number of Music Sub Unit for both direction. */ 861eb7b3a05STakashi Sakamoto err = avc_general_get_plug_info(bebob->unit, 0x0c, 0x00, 0x00, plugs); 862eb7b3a05STakashi Sakamoto if (err < 0) { 863eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 864eb7b3a05STakashi Sakamoto "fail to get info for MSU in/out plugs: %d\n", 865eb7b3a05STakashi Sakamoto err); 866eb7b3a05STakashi Sakamoto goto end; 867eb7b3a05STakashi Sakamoto } 868eb7b3a05STakashi Sakamoto 869eb7b3a05STakashi Sakamoto /* seek destination plugs for 'MSU sync input' */ 870eb7b3a05STakashi Sakamoto bebob->sync_input_plug = -1; 871eb7b3a05STakashi Sakamoto for (i = 0; i < plugs[0]; i++) { 872eb7b3a05STakashi Sakamoto avc_bridgeco_fill_msu_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, i); 873eb7b3a05STakashi Sakamoto err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 874eb7b3a05STakashi Sakamoto if (err < 0) { 875eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 876eb7b3a05STakashi Sakamoto "fail to get type for MSU in plug %d: %d\n", 877eb7b3a05STakashi Sakamoto i, err); 878eb7b3a05STakashi Sakamoto goto end; 879eb7b3a05STakashi Sakamoto } 880eb7b3a05STakashi Sakamoto 881eb7b3a05STakashi Sakamoto if (type == AVC_BRIDGECO_PLUG_TYPE_SYNC) { 882eb7b3a05STakashi Sakamoto bebob->sync_input_plug = i; 883eb7b3a05STakashi Sakamoto break; 884eb7b3a05STakashi Sakamoto } 885eb7b3a05STakashi Sakamoto } 886eb7b3a05STakashi Sakamoto end: 887eb7b3a05STakashi Sakamoto return err; 888eb7b3a05STakashi Sakamoto } 889eb7b3a05STakashi Sakamoto 890eb7b3a05STakashi Sakamoto int snd_bebob_stream_discover(struct snd_bebob *bebob) 891eb7b3a05STakashi Sakamoto { 8921fc9522aSTakashi Sakamoto struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock; 893eb7b3a05STakashi Sakamoto u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES]; 894eb7b3a05STakashi Sakamoto enum avc_bridgeco_plug_type type; 895eb7b3a05STakashi Sakamoto unsigned int i; 896eb7b3a05STakashi Sakamoto int err; 897eb7b3a05STakashi Sakamoto 898eb7b3a05STakashi Sakamoto /* the number of plugs for isoc in/out, ext in/out */ 899eb7b3a05STakashi Sakamoto err = avc_general_get_plug_info(bebob->unit, 0x1f, 0x07, 0x00, plugs); 900eb7b3a05STakashi Sakamoto if (err < 0) { 901eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 902eb7b3a05STakashi Sakamoto "fail to get info for isoc/external in/out plugs: %d\n", 903eb7b3a05STakashi Sakamoto err); 904eb7b3a05STakashi Sakamoto goto end; 905eb7b3a05STakashi Sakamoto } 906eb7b3a05STakashi Sakamoto 907eb7b3a05STakashi Sakamoto /* 908eb7b3a05STakashi Sakamoto * This module supports at least one isoc input plug and one isoc 909eb7b3a05STakashi Sakamoto * output plug. 910eb7b3a05STakashi Sakamoto */ 911eb7b3a05STakashi Sakamoto if ((plugs[0] == 0) || (plugs[1] == 0)) { 912eb7b3a05STakashi Sakamoto err = -ENOSYS; 913eb7b3a05STakashi Sakamoto goto end; 914eb7b3a05STakashi Sakamoto } 915eb7b3a05STakashi Sakamoto 916eb7b3a05STakashi Sakamoto avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, 917eb7b3a05STakashi Sakamoto AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); 918eb7b3a05STakashi Sakamoto err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 919eb7b3a05STakashi Sakamoto if (err < 0) { 920eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 921eb7b3a05STakashi Sakamoto "fail to get type for isoc in plug 0: %d\n", err); 922eb7b3a05STakashi Sakamoto goto end; 923eb7b3a05STakashi Sakamoto } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) { 924eb7b3a05STakashi Sakamoto err = -ENOSYS; 925eb7b3a05STakashi Sakamoto goto end; 926eb7b3a05STakashi Sakamoto } 927eb7b3a05STakashi Sakamoto err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_IN, 0); 928eb7b3a05STakashi Sakamoto if (err < 0) 929eb7b3a05STakashi Sakamoto goto end; 930eb7b3a05STakashi Sakamoto 931eb7b3a05STakashi Sakamoto avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT, 932eb7b3a05STakashi Sakamoto AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); 933eb7b3a05STakashi Sakamoto err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 934eb7b3a05STakashi Sakamoto if (err < 0) { 935eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 936eb7b3a05STakashi Sakamoto "fail to get type for isoc out plug 0: %d\n", err); 937eb7b3a05STakashi Sakamoto goto end; 938eb7b3a05STakashi Sakamoto } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) { 939eb7b3a05STakashi Sakamoto err = -ENOSYS; 940eb7b3a05STakashi Sakamoto goto end; 941eb7b3a05STakashi Sakamoto } 942eb7b3a05STakashi Sakamoto err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_OUT, 0); 943eb7b3a05STakashi Sakamoto if (err < 0) 944eb7b3a05STakashi Sakamoto goto end; 945eb7b3a05STakashi Sakamoto 946eb7b3a05STakashi Sakamoto /* count external input plugs for MIDI */ 947eb7b3a05STakashi Sakamoto bebob->midi_input_ports = 0; 948eb7b3a05STakashi Sakamoto for (i = 0; i < plugs[2]; i++) { 949eb7b3a05STakashi Sakamoto avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, 950eb7b3a05STakashi Sakamoto AVC_BRIDGECO_PLUG_UNIT_EXT, i); 951eb7b3a05STakashi Sakamoto err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 952eb7b3a05STakashi Sakamoto if (err < 0) { 953eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 954eb7b3a05STakashi Sakamoto "fail to get type for external in plug %d: %d\n", 955eb7b3a05STakashi Sakamoto i, err); 956eb7b3a05STakashi Sakamoto goto end; 957eb7b3a05STakashi Sakamoto } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) { 958eb7b3a05STakashi Sakamoto bebob->midi_input_ports++; 959eb7b3a05STakashi Sakamoto } 960eb7b3a05STakashi Sakamoto } 961eb7b3a05STakashi Sakamoto 962eb7b3a05STakashi Sakamoto /* count external output plugs for MIDI */ 963eb7b3a05STakashi Sakamoto bebob->midi_output_ports = 0; 964eb7b3a05STakashi Sakamoto for (i = 0; i < plugs[3]; i++) { 965eb7b3a05STakashi Sakamoto avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT, 966eb7b3a05STakashi Sakamoto AVC_BRIDGECO_PLUG_UNIT_EXT, i); 967eb7b3a05STakashi Sakamoto err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); 968eb7b3a05STakashi Sakamoto if (err < 0) { 969eb7b3a05STakashi Sakamoto dev_err(&bebob->unit->device, 970eb7b3a05STakashi Sakamoto "fail to get type for external out plug %d: %d\n", 971eb7b3a05STakashi Sakamoto i, err); 972eb7b3a05STakashi Sakamoto goto end; 973eb7b3a05STakashi Sakamoto } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) { 974eb7b3a05STakashi Sakamoto bebob->midi_output_ports++; 975eb7b3a05STakashi Sakamoto } 976eb7b3a05STakashi Sakamoto } 977eb7b3a05STakashi Sakamoto 978eb7b3a05STakashi Sakamoto /* for check source of clock later */ 9791fc9522aSTakashi Sakamoto if (!clk_spec) 980eb7b3a05STakashi Sakamoto err = seek_msu_sync_input_plug(bebob); 981eb7b3a05STakashi Sakamoto end: 982eb7b3a05STakashi Sakamoto return err; 983eb7b3a05STakashi Sakamoto } 984618eabeaSTakashi Sakamoto 985618eabeaSTakashi Sakamoto void snd_bebob_stream_lock_changed(struct snd_bebob *bebob) 986618eabeaSTakashi Sakamoto { 987618eabeaSTakashi Sakamoto bebob->dev_lock_changed = true; 988618eabeaSTakashi Sakamoto wake_up(&bebob->hwdep_wait); 989618eabeaSTakashi Sakamoto } 990618eabeaSTakashi Sakamoto 991618eabeaSTakashi Sakamoto int snd_bebob_stream_lock_try(struct snd_bebob *bebob) 992618eabeaSTakashi Sakamoto { 993618eabeaSTakashi Sakamoto int err; 994618eabeaSTakashi Sakamoto 995618eabeaSTakashi Sakamoto spin_lock_irq(&bebob->lock); 996618eabeaSTakashi Sakamoto 997618eabeaSTakashi Sakamoto /* user land lock this */ 998618eabeaSTakashi Sakamoto if (bebob->dev_lock_count < 0) { 999618eabeaSTakashi Sakamoto err = -EBUSY; 1000618eabeaSTakashi Sakamoto goto end; 1001618eabeaSTakashi Sakamoto } 1002618eabeaSTakashi Sakamoto 1003618eabeaSTakashi Sakamoto /* this is the first time */ 1004618eabeaSTakashi Sakamoto if (bebob->dev_lock_count++ == 0) 1005618eabeaSTakashi Sakamoto snd_bebob_stream_lock_changed(bebob); 1006618eabeaSTakashi Sakamoto err = 0; 1007618eabeaSTakashi Sakamoto end: 1008618eabeaSTakashi Sakamoto spin_unlock_irq(&bebob->lock); 1009618eabeaSTakashi Sakamoto return err; 1010618eabeaSTakashi Sakamoto } 1011618eabeaSTakashi Sakamoto 1012618eabeaSTakashi Sakamoto void snd_bebob_stream_lock_release(struct snd_bebob *bebob) 1013618eabeaSTakashi Sakamoto { 1014618eabeaSTakashi Sakamoto spin_lock_irq(&bebob->lock); 1015618eabeaSTakashi Sakamoto 1016618eabeaSTakashi Sakamoto if (WARN_ON(bebob->dev_lock_count <= 0)) 1017618eabeaSTakashi Sakamoto goto end; 1018618eabeaSTakashi Sakamoto if (--bebob->dev_lock_count == 0) 1019618eabeaSTakashi Sakamoto snd_bebob_stream_lock_changed(bebob); 1020618eabeaSTakashi Sakamoto end: 1021618eabeaSTakashi Sakamoto spin_unlock_irq(&bebob->lock); 1022618eabeaSTakashi Sakamoto } 1023