1e2786ca6STakashi Sakamoto /* 2e2786ca6STakashi Sakamoto * oxfw_stream.c - a part of driver for OXFW970/971 based devices 3e2786ca6STakashi Sakamoto * 4e2786ca6STakashi Sakamoto * Copyright (c) 2014 Takashi Sakamoto 5e2786ca6STakashi Sakamoto * 6e2786ca6STakashi Sakamoto * Licensed under the terms of the GNU General Public License, version 2. 7e2786ca6STakashi Sakamoto */ 8e2786ca6STakashi Sakamoto 9e2786ca6STakashi Sakamoto #include "oxfw.h" 10f3699e2cSTakashi Sakamoto #include <linux/delay.h> 11e2786ca6STakashi Sakamoto 125cd1d3f4STakashi Sakamoto #define AVC_GENERIC_FRAME_MAXIMUM_BYTES 512 13f3699e2cSTakashi Sakamoto #define CALLBACK_TIMEOUT 200 145cd1d3f4STakashi Sakamoto 155cd1d3f4STakashi Sakamoto /* 165cd1d3f4STakashi Sakamoto * According to datasheet of Oxford Semiconductor: 175cd1d3f4STakashi Sakamoto * OXFW970: 32.0/44.1/48.0/96.0 Khz, 8 audio channels I/O 185cd1d3f4STakashi Sakamoto * OXFW971: 32.0/44.1/48.0/88.2/96.0/192.0 kHz, 16 audio channels I/O, MIDI I/O 195cd1d3f4STakashi Sakamoto */ 205cd1d3f4STakashi Sakamoto static const unsigned int oxfw_rate_table[] = { 215cd1d3f4STakashi Sakamoto [0] = 32000, 225cd1d3f4STakashi Sakamoto [1] = 44100, 235cd1d3f4STakashi Sakamoto [2] = 48000, 245cd1d3f4STakashi Sakamoto [3] = 88200, 255cd1d3f4STakashi Sakamoto [4] = 96000, 265cd1d3f4STakashi Sakamoto [5] = 192000, 275cd1d3f4STakashi Sakamoto }; 285cd1d3f4STakashi Sakamoto 295cd1d3f4STakashi Sakamoto /* 305cd1d3f4STakashi Sakamoto * See Table 5.7 – Sampling frequency for Multi-bit Audio 315cd1d3f4STakashi Sakamoto * in AV/C Stream Format Information Specification 1.1 (Apr 2005, 1394TA) 325cd1d3f4STakashi Sakamoto */ 335cd1d3f4STakashi Sakamoto static const unsigned int avc_stream_rate_table[] = { 345cd1d3f4STakashi Sakamoto [0] = 0x02, 355cd1d3f4STakashi Sakamoto [1] = 0x03, 365cd1d3f4STakashi Sakamoto [2] = 0x04, 375cd1d3f4STakashi Sakamoto [3] = 0x0a, 385cd1d3f4STakashi Sakamoto [4] = 0x05, 395cd1d3f4STakashi Sakamoto [5] = 0x07, 405cd1d3f4STakashi Sakamoto }; 415cd1d3f4STakashi Sakamoto 42b0ac0009STakashi Sakamoto static int set_rate(struct snd_oxfw *oxfw, unsigned int rate) 43b0ac0009STakashi Sakamoto { 44b0ac0009STakashi Sakamoto int err; 45b0ac0009STakashi Sakamoto 46b0ac0009STakashi Sakamoto err = avc_general_set_sig_fmt(oxfw->unit, rate, 47b0ac0009STakashi Sakamoto AVC_GENERAL_PLUG_DIR_IN, 0); 48b0ac0009STakashi Sakamoto if (err < 0) 49b0ac0009STakashi Sakamoto goto end; 50b0ac0009STakashi Sakamoto 51b0ac0009STakashi Sakamoto if (oxfw->has_output) 52b0ac0009STakashi Sakamoto err = avc_general_set_sig_fmt(oxfw->unit, rate, 53b0ac0009STakashi Sakamoto AVC_GENERAL_PLUG_DIR_OUT, 0); 54b0ac0009STakashi Sakamoto end: 55b0ac0009STakashi Sakamoto return err; 56b0ac0009STakashi Sakamoto } 57b0ac0009STakashi Sakamoto 58f3699e2cSTakashi Sakamoto static int set_stream_format(struct snd_oxfw *oxfw, struct amdtp_stream *s, 59f3699e2cSTakashi Sakamoto unsigned int rate, unsigned int pcm_channels) 60f3699e2cSTakashi Sakamoto { 61f3699e2cSTakashi Sakamoto u8 **formats; 62f3699e2cSTakashi Sakamoto struct snd_oxfw_stream_formation formation; 63f3699e2cSTakashi Sakamoto enum avc_general_plug_dir dir; 645580ba7bSDan Carpenter unsigned int len; 655580ba7bSDan Carpenter int i, err; 66f3699e2cSTakashi Sakamoto 67b0ac0009STakashi Sakamoto if (s == &oxfw->tx_stream) { 68b0ac0009STakashi Sakamoto formats = oxfw->tx_stream_formats; 69b0ac0009STakashi Sakamoto dir = AVC_GENERAL_PLUG_DIR_OUT; 70b0ac0009STakashi Sakamoto } else { 71f3699e2cSTakashi Sakamoto formats = oxfw->rx_stream_formats; 72f3699e2cSTakashi Sakamoto dir = AVC_GENERAL_PLUG_DIR_IN; 73b0ac0009STakashi Sakamoto } 74f3699e2cSTakashi Sakamoto 75f3699e2cSTakashi Sakamoto /* Seek stream format for requirements. */ 76f3699e2cSTakashi Sakamoto for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 77f3699e2cSTakashi Sakamoto err = snd_oxfw_stream_parse_format(formats[i], &formation); 78f3699e2cSTakashi Sakamoto if (err < 0) 79f3699e2cSTakashi Sakamoto return err; 80f3699e2cSTakashi Sakamoto 81f3699e2cSTakashi Sakamoto if ((formation.rate == rate) && (formation.pcm == pcm_channels)) 82f3699e2cSTakashi Sakamoto break; 83f3699e2cSTakashi Sakamoto } 84f3699e2cSTakashi Sakamoto if (i == SND_OXFW_STREAM_FORMAT_ENTRIES) 85f3699e2cSTakashi Sakamoto return -EINVAL; 86f3699e2cSTakashi Sakamoto 87f3699e2cSTakashi Sakamoto /* If assumed, just change rate. */ 88f3699e2cSTakashi Sakamoto if (oxfw->assumed) 89b0ac0009STakashi Sakamoto return set_rate(oxfw, rate); 90f3699e2cSTakashi Sakamoto 91f3699e2cSTakashi Sakamoto /* Calculate format length. */ 92f3699e2cSTakashi Sakamoto len = 5 + formats[i][4] * 2; 93f3699e2cSTakashi Sakamoto 94f3699e2cSTakashi Sakamoto err = avc_stream_set_format(oxfw->unit, dir, 0, formats[i], len); 95f3699e2cSTakashi Sakamoto if (err < 0) 96f3699e2cSTakashi Sakamoto return err; 97f3699e2cSTakashi Sakamoto 98f3699e2cSTakashi Sakamoto /* Some requests just after changing format causes freezing. */ 99f3699e2cSTakashi Sakamoto msleep(100); 100f3699e2cSTakashi Sakamoto 101f3699e2cSTakashi Sakamoto return 0; 102f3699e2cSTakashi Sakamoto } 103f3699e2cSTakashi Sakamoto 104b0ac0009STakashi Sakamoto static void stop_stream(struct snd_oxfw *oxfw, struct amdtp_stream *stream) 105e2786ca6STakashi Sakamoto { 106b0ac0009STakashi Sakamoto amdtp_stream_pcm_abort(stream); 107b0ac0009STakashi Sakamoto amdtp_stream_stop(stream); 108e2786ca6STakashi Sakamoto 109b0ac0009STakashi Sakamoto if (stream == &oxfw->tx_stream) 110b0ac0009STakashi Sakamoto cmp_connection_break(&oxfw->out_conn); 111b0ac0009STakashi Sakamoto else 112e2786ca6STakashi Sakamoto cmp_connection_break(&oxfw->in_conn); 113e2786ca6STakashi Sakamoto } 114e2786ca6STakashi Sakamoto 115b0ac0009STakashi Sakamoto static int start_stream(struct snd_oxfw *oxfw, struct amdtp_stream *stream, 116b0ac0009STakashi Sakamoto unsigned int rate, unsigned int pcm_channels) 117e2786ca6STakashi Sakamoto { 118f3699e2cSTakashi Sakamoto u8 **formats; 119f3699e2cSTakashi Sakamoto struct cmp_connection *conn; 120f3699e2cSTakashi Sakamoto struct snd_oxfw_stream_formation formation; 121f3699e2cSTakashi Sakamoto unsigned int i, midi_ports; 122f3699e2cSTakashi Sakamoto int err; 123f3699e2cSTakashi Sakamoto 124b0ac0009STakashi Sakamoto if (stream == &oxfw->rx_stream) { 125f3699e2cSTakashi Sakamoto formats = oxfw->rx_stream_formats; 126f3699e2cSTakashi Sakamoto conn = &oxfw->in_conn; 127b0ac0009STakashi Sakamoto } else { 128b0ac0009STakashi Sakamoto formats = oxfw->tx_stream_formats; 129b0ac0009STakashi Sakamoto conn = &oxfw->out_conn; 130b0ac0009STakashi Sakamoto } 131f3699e2cSTakashi Sakamoto 132b0ac0009STakashi Sakamoto /* Get stream format */ 133f3699e2cSTakashi Sakamoto for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 134f3699e2cSTakashi Sakamoto if (formats[i] == NULL) 135f3699e2cSTakashi Sakamoto break; 136f3699e2cSTakashi Sakamoto 137f3699e2cSTakashi Sakamoto err = snd_oxfw_stream_parse_format(formats[i], &formation); 138f3699e2cSTakashi Sakamoto if (err < 0) 139f3699e2cSTakashi Sakamoto goto end; 140f3699e2cSTakashi Sakamoto if (rate != formation.rate) 141f3699e2cSTakashi Sakamoto continue; 142f3699e2cSTakashi Sakamoto if (pcm_channels == 0 || pcm_channels == formation.pcm) 143f3699e2cSTakashi Sakamoto break; 144f3699e2cSTakashi Sakamoto } 145f3699e2cSTakashi Sakamoto if (i == SND_OXFW_STREAM_FORMAT_ENTRIES) { 146f3699e2cSTakashi Sakamoto err = -EINVAL; 147f3699e2cSTakashi Sakamoto goto end; 148f3699e2cSTakashi Sakamoto } 149f3699e2cSTakashi Sakamoto 150f3699e2cSTakashi Sakamoto pcm_channels = formation.pcm; 151bb71da43STakashi Sakamoto midi_ports = formation.midi * 8; 152f3699e2cSTakashi Sakamoto 153f3699e2cSTakashi Sakamoto /* The stream should have one pcm channels at least */ 154f3699e2cSTakashi Sakamoto if (pcm_channels == 0) { 155f3699e2cSTakashi Sakamoto err = -EINVAL; 156f3699e2cSTakashi Sakamoto goto end; 157f3699e2cSTakashi Sakamoto } 15851c29fd2STakashi Sakamoto err = amdtp_am824_set_parameters(stream, rate, pcm_channels, midi_ports, 15951c29fd2STakashi Sakamoto false); 160547e631cSTakashi Sakamoto if (err < 0) 161547e631cSTakashi Sakamoto goto end; 162f3699e2cSTakashi Sakamoto 163f3699e2cSTakashi Sakamoto err = cmp_connection_establish(conn, 164f3699e2cSTakashi Sakamoto amdtp_stream_get_max_payload(stream)); 165f3699e2cSTakashi Sakamoto if (err < 0) 166f3699e2cSTakashi Sakamoto goto end; 167f3699e2cSTakashi Sakamoto 168f3699e2cSTakashi Sakamoto err = amdtp_stream_start(stream, 169f3699e2cSTakashi Sakamoto conn->resources.channel, 170f3699e2cSTakashi Sakamoto conn->speed); 171f3699e2cSTakashi Sakamoto if (err < 0) { 172f3699e2cSTakashi Sakamoto cmp_connection_break(conn); 173f3699e2cSTakashi Sakamoto goto end; 174f3699e2cSTakashi Sakamoto } 175f3699e2cSTakashi Sakamoto 176f3699e2cSTakashi Sakamoto /* Wait first packet */ 177f2b14c0bSTakashi Sakamoto if (!amdtp_stream_wait_callback(stream, CALLBACK_TIMEOUT)) { 178b0ac0009STakashi Sakamoto stop_stream(oxfw, stream); 179f2b14c0bSTakashi Sakamoto err = -ETIMEDOUT; 180f2b14c0bSTakashi Sakamoto } 181f3699e2cSTakashi Sakamoto end: 182f3699e2cSTakashi Sakamoto return err; 183f3699e2cSTakashi Sakamoto } 184f3699e2cSTakashi Sakamoto 185b0ac0009STakashi Sakamoto static int check_connection_used_by_others(struct snd_oxfw *oxfw, 186b0ac0009STakashi Sakamoto struct amdtp_stream *stream) 187f3699e2cSTakashi Sakamoto { 188b0ac0009STakashi Sakamoto struct cmp_connection *conn; 189b0ac0009STakashi Sakamoto bool used; 190b0ac0009STakashi Sakamoto int err; 191b0ac0009STakashi Sakamoto 192b0ac0009STakashi Sakamoto if (stream == &oxfw->tx_stream) 193b0ac0009STakashi Sakamoto conn = &oxfw->out_conn; 194b0ac0009STakashi Sakamoto else 195b0ac0009STakashi Sakamoto conn = &oxfw->in_conn; 196b0ac0009STakashi Sakamoto 197b0ac0009STakashi Sakamoto err = cmp_connection_check_used(conn, &used); 198b0ac0009STakashi Sakamoto if ((err >= 0) && used && !amdtp_stream_running(stream)) { 199b0ac0009STakashi Sakamoto dev_err(&oxfw->unit->device, 200b0ac0009STakashi Sakamoto "Connection established by others: %cPCR[%d]\n", 201b0ac0009STakashi Sakamoto (conn->direction == CMP_OUTPUT) ? 'o' : 'i', 202b0ac0009STakashi Sakamoto conn->pcr_index); 203b0ac0009STakashi Sakamoto err = -EBUSY; 204b0ac0009STakashi Sakamoto } 205b0ac0009STakashi Sakamoto 206b0ac0009STakashi Sakamoto return err; 207b0ac0009STakashi Sakamoto } 208b0ac0009STakashi Sakamoto 209b0ac0009STakashi Sakamoto int snd_oxfw_stream_init_simplex(struct snd_oxfw *oxfw, 210b0ac0009STakashi Sakamoto struct amdtp_stream *stream) 211b0ac0009STakashi Sakamoto { 212b0ac0009STakashi Sakamoto struct cmp_connection *conn; 213b0ac0009STakashi Sakamoto enum cmp_direction c_dir; 214b0ac0009STakashi Sakamoto enum amdtp_stream_direction s_dir; 215b0ac0009STakashi Sakamoto int err; 216b0ac0009STakashi Sakamoto 217b0ac0009STakashi Sakamoto if (stream == &oxfw->tx_stream) { 218b0ac0009STakashi Sakamoto conn = &oxfw->out_conn; 219b0ac0009STakashi Sakamoto c_dir = CMP_OUTPUT; 220b0ac0009STakashi Sakamoto s_dir = AMDTP_IN_STREAM; 221b0ac0009STakashi Sakamoto } else { 222b0ac0009STakashi Sakamoto conn = &oxfw->in_conn; 223b0ac0009STakashi Sakamoto c_dir = CMP_INPUT; 224b0ac0009STakashi Sakamoto s_dir = AMDTP_OUT_STREAM; 225b0ac0009STakashi Sakamoto } 226b0ac0009STakashi Sakamoto 227b0ac0009STakashi Sakamoto err = cmp_connection_init(conn, oxfw->unit, c_dir, 0); 228b0ac0009STakashi Sakamoto if (err < 0) 229b0ac0009STakashi Sakamoto goto end; 230b0ac0009STakashi Sakamoto 2315955815eSTakashi Sakamoto err = amdtp_am824_init(stream, oxfw->unit, s_dir, CIP_NONBLOCKING); 232b0ac0009STakashi Sakamoto if (err < 0) { 233b0ac0009STakashi Sakamoto amdtp_stream_destroy(stream); 234b0ac0009STakashi Sakamoto cmp_connection_destroy(conn); 235b0ac0009STakashi Sakamoto goto end; 236b0ac0009STakashi Sakamoto } 237b0ac0009STakashi Sakamoto 238a2064710STakashi Sakamoto /* 239a2064710STakashi Sakamoto * OXFW starts to transmit packets with non-zero dbc. 240a2064710STakashi Sakamoto * OXFW postpone transferring packets till handling any asynchronous 241a2064710STakashi Sakamoto * packets. As a result, next isochronous packet includes more data 242a2064710STakashi Sakamoto * blocks than IEC 61883-6 defines. 243a2064710STakashi Sakamoto */ 24413f3a46dSTakashi Sakamoto if (stream == &oxfw->tx_stream) { 24562f00e40STakashi Sakamoto oxfw->tx_stream.flags |= CIP_JUMBO_PAYLOAD; 24613f3a46dSTakashi Sakamoto if (oxfw->wrong_dbs) 24713f3a46dSTakashi Sakamoto oxfw->tx_stream.flags |= CIP_WRONG_DBS; 24813f3a46dSTakashi Sakamoto } 249b0ac0009STakashi Sakamoto end: 250b0ac0009STakashi Sakamoto return err; 251b0ac0009STakashi Sakamoto } 252b0ac0009STakashi Sakamoto 253b0ac0009STakashi Sakamoto int snd_oxfw_stream_start_simplex(struct snd_oxfw *oxfw, 254b0ac0009STakashi Sakamoto struct amdtp_stream *stream, 255b0ac0009STakashi Sakamoto unsigned int rate, unsigned int pcm_channels) 256b0ac0009STakashi Sakamoto { 257b0ac0009STakashi Sakamoto struct amdtp_stream *opposite; 258f3699e2cSTakashi Sakamoto struct snd_oxfw_stream_formation formation; 259b0ac0009STakashi Sakamoto enum avc_general_plug_dir dir; 260b0ac0009STakashi Sakamoto unsigned int substreams, opposite_substreams; 261e2786ca6STakashi Sakamoto int err = 0; 262e2786ca6STakashi Sakamoto 263b0ac0009STakashi Sakamoto if (stream == &oxfw->tx_stream) { 264b0ac0009STakashi Sakamoto substreams = oxfw->capture_substreams; 265b0ac0009STakashi Sakamoto opposite = &oxfw->rx_stream; 266b0ac0009STakashi Sakamoto opposite_substreams = oxfw->playback_substreams; 267b0ac0009STakashi Sakamoto dir = AVC_GENERAL_PLUG_DIR_OUT; 268b0ac0009STakashi Sakamoto } else { 269b0ac0009STakashi Sakamoto substreams = oxfw->playback_substreams; 270b0ac0009STakashi Sakamoto opposite_substreams = oxfw->capture_substreams; 271e2786ca6STakashi Sakamoto 272b0ac0009STakashi Sakamoto if (oxfw->has_output) 273b0ac0009STakashi Sakamoto opposite = &oxfw->rx_stream; 274b0ac0009STakashi Sakamoto else 275b0ac0009STakashi Sakamoto opposite = NULL; 276b0ac0009STakashi Sakamoto 277b0ac0009STakashi Sakamoto dir = AVC_GENERAL_PLUG_DIR_IN; 278b0ac0009STakashi Sakamoto } 279b0ac0009STakashi Sakamoto 280b0ac0009STakashi Sakamoto if (substreams == 0) 281b0ac0009STakashi Sakamoto goto end; 282b0ac0009STakashi Sakamoto 283b0ac0009STakashi Sakamoto /* 284b0ac0009STakashi Sakamoto * Considering JACK/FFADO streaming: 285b0ac0009STakashi Sakamoto * TODO: This can be removed hwdep functionality becomes popular. 286b0ac0009STakashi Sakamoto */ 287b0ac0009STakashi Sakamoto err = check_connection_used_by_others(oxfw, stream); 288b0ac0009STakashi Sakamoto if (err < 0) 289b0ac0009STakashi Sakamoto goto end; 290b0ac0009STakashi Sakamoto 291b0ac0009STakashi Sakamoto /* packet queueing error */ 292b0ac0009STakashi Sakamoto if (amdtp_streaming_error(stream)) 293b0ac0009STakashi Sakamoto stop_stream(oxfw, stream); 294b0ac0009STakashi Sakamoto 295b0ac0009STakashi Sakamoto err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation); 296e2786ca6STakashi Sakamoto if (err < 0) 297e2786ca6STakashi Sakamoto goto end; 29805588d34STakashi Sakamoto if (rate == 0) 29905588d34STakashi Sakamoto rate = formation.rate; 30005588d34STakashi Sakamoto if (pcm_channels == 0) 30105588d34STakashi Sakamoto pcm_channels = formation.pcm; 302e2786ca6STakashi Sakamoto 303f3699e2cSTakashi Sakamoto if ((formation.rate != rate) || (formation.pcm != pcm_channels)) { 304b0ac0009STakashi Sakamoto if (opposite != NULL) { 305b0ac0009STakashi Sakamoto err = check_connection_used_by_others(oxfw, opposite); 306b0ac0009STakashi Sakamoto if (err < 0) 307b0ac0009STakashi Sakamoto goto end; 308b0ac0009STakashi Sakamoto stop_stream(oxfw, opposite); 309b0ac0009STakashi Sakamoto } 310b0ac0009STakashi Sakamoto stop_stream(oxfw, stream); 311f3699e2cSTakashi Sakamoto 312b0ac0009STakashi Sakamoto err = set_stream_format(oxfw, stream, rate, pcm_channels); 313f3699e2cSTakashi Sakamoto if (err < 0) { 314f3699e2cSTakashi Sakamoto dev_err(&oxfw->unit->device, 315f3699e2cSTakashi Sakamoto "fail to set stream format: %d\n", err); 316f3699e2cSTakashi Sakamoto goto end; 317f3699e2cSTakashi Sakamoto } 318b0ac0009STakashi Sakamoto 319b0ac0009STakashi Sakamoto /* Start opposite stream if needed. */ 320b0ac0009STakashi Sakamoto if (opposite && !amdtp_stream_running(opposite) && 321b0ac0009STakashi Sakamoto (opposite_substreams > 0)) { 322b0ac0009STakashi Sakamoto err = start_stream(oxfw, opposite, rate, 0); 323b0ac0009STakashi Sakamoto if (err < 0) { 324b0ac0009STakashi Sakamoto dev_err(&oxfw->unit->device, 325b0ac0009STakashi Sakamoto "fail to restart stream: %d\n", err); 326b0ac0009STakashi Sakamoto goto end; 327b0ac0009STakashi Sakamoto } 328b0ac0009STakashi Sakamoto } 329f3699e2cSTakashi Sakamoto } 330f3699e2cSTakashi Sakamoto 331b0ac0009STakashi Sakamoto /* Start requested stream. */ 332b0ac0009STakashi Sakamoto if (!amdtp_stream_running(stream)) { 333b0ac0009STakashi Sakamoto err = start_stream(oxfw, stream, rate, pcm_channels); 334f3699e2cSTakashi Sakamoto if (err < 0) 335f3699e2cSTakashi Sakamoto dev_err(&oxfw->unit->device, 336f3699e2cSTakashi Sakamoto "fail to start stream: %d\n", err); 337b0ac0009STakashi Sakamoto } 338e2786ca6STakashi Sakamoto end: 339e2786ca6STakashi Sakamoto return err; 340e2786ca6STakashi Sakamoto } 341e2786ca6STakashi Sakamoto 342b0ac0009STakashi Sakamoto void snd_oxfw_stream_stop_simplex(struct snd_oxfw *oxfw, 343b0ac0009STakashi Sakamoto struct amdtp_stream *stream) 344e2786ca6STakashi Sakamoto { 345b0ac0009STakashi Sakamoto if (((stream == &oxfw->tx_stream) && (oxfw->capture_substreams > 0)) || 346b0ac0009STakashi Sakamoto ((stream == &oxfw->rx_stream) && (oxfw->playback_substreams > 0))) 347b0ac0009STakashi Sakamoto return; 348b0ac0009STakashi Sakamoto 349b0ac0009STakashi Sakamoto stop_stream(oxfw, stream); 350e2786ca6STakashi Sakamoto } 351e2786ca6STakashi Sakamoto 352d23c2cc4STakashi Sakamoto /* 353d23c2cc4STakashi Sakamoto * This function should be called before starting the stream or after stopping 354d23c2cc4STakashi Sakamoto * the streams. 355d23c2cc4STakashi Sakamoto */ 356b0ac0009STakashi Sakamoto void snd_oxfw_stream_destroy_simplex(struct snd_oxfw *oxfw, 357b0ac0009STakashi Sakamoto struct amdtp_stream *stream) 358e2786ca6STakashi Sakamoto { 359b0ac0009STakashi Sakamoto struct cmp_connection *conn; 360e2786ca6STakashi Sakamoto 361b0ac0009STakashi Sakamoto if (stream == &oxfw->tx_stream) 362b0ac0009STakashi Sakamoto conn = &oxfw->out_conn; 363e2786ca6STakashi Sakamoto else 364b0ac0009STakashi Sakamoto conn = &oxfw->in_conn; 365b0ac0009STakashi Sakamoto 366b0ac0009STakashi Sakamoto amdtp_stream_destroy(stream); 367b0ac0009STakashi Sakamoto cmp_connection_destroy(conn); 368b0ac0009STakashi Sakamoto } 369b0ac0009STakashi Sakamoto 370b0ac0009STakashi Sakamoto void snd_oxfw_stream_update_simplex(struct snd_oxfw *oxfw, 371b0ac0009STakashi Sakamoto struct amdtp_stream *stream) 372b0ac0009STakashi Sakamoto { 373b0ac0009STakashi Sakamoto struct cmp_connection *conn; 374b0ac0009STakashi Sakamoto 375b0ac0009STakashi Sakamoto if (stream == &oxfw->tx_stream) 376b0ac0009STakashi Sakamoto conn = &oxfw->out_conn; 377b0ac0009STakashi Sakamoto else 378b0ac0009STakashi Sakamoto conn = &oxfw->in_conn; 379b0ac0009STakashi Sakamoto 380b0ac0009STakashi Sakamoto if (cmp_connection_update(conn) < 0) 381b0ac0009STakashi Sakamoto stop_stream(oxfw, stream); 382b0ac0009STakashi Sakamoto else 383b0ac0009STakashi Sakamoto amdtp_stream_update(stream); 384e2786ca6STakashi Sakamoto } 3855cd1d3f4STakashi Sakamoto 3863c96101fSTakashi Sakamoto int snd_oxfw_stream_get_current_formation(struct snd_oxfw *oxfw, 3873c96101fSTakashi Sakamoto enum avc_general_plug_dir dir, 3883c96101fSTakashi Sakamoto struct snd_oxfw_stream_formation *formation) 3893c96101fSTakashi Sakamoto { 3903c96101fSTakashi Sakamoto u8 *format; 3913c96101fSTakashi Sakamoto unsigned int len; 3923c96101fSTakashi Sakamoto int err; 3933c96101fSTakashi Sakamoto 3943c96101fSTakashi Sakamoto len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 3953c96101fSTakashi Sakamoto format = kmalloc(len, GFP_KERNEL); 3963c96101fSTakashi Sakamoto if (format == NULL) 3973c96101fSTakashi Sakamoto return -ENOMEM; 3983c96101fSTakashi Sakamoto 3993c96101fSTakashi Sakamoto err = avc_stream_get_format_single(oxfw->unit, dir, 0, format, &len); 4003c96101fSTakashi Sakamoto if (err < 0) 4013c96101fSTakashi Sakamoto goto end; 4023c96101fSTakashi Sakamoto if (len < 3) { 4033c96101fSTakashi Sakamoto err = -EIO; 4043c96101fSTakashi Sakamoto goto end; 4053c96101fSTakashi Sakamoto } 4063c96101fSTakashi Sakamoto 4073c96101fSTakashi Sakamoto err = snd_oxfw_stream_parse_format(format, formation); 4083c96101fSTakashi Sakamoto end: 4093c96101fSTakashi Sakamoto kfree(format); 4103c96101fSTakashi Sakamoto return err; 4113c96101fSTakashi Sakamoto } 4123c96101fSTakashi Sakamoto 4135cd1d3f4STakashi Sakamoto /* 4145cd1d3f4STakashi Sakamoto * See Table 6.16 - AM824 Stream Format 4155cd1d3f4STakashi Sakamoto * Figure 6.19 - format_information field for AM824 Compound 4165cd1d3f4STakashi Sakamoto * in AV/C Stream Format Information Specification 1.1 (Apr 2005, 1394TA) 4175cd1d3f4STakashi Sakamoto * Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005 4185cd1d3f4STakashi Sakamoto */ 4195cd1d3f4STakashi Sakamoto int snd_oxfw_stream_parse_format(u8 *format, 4205cd1d3f4STakashi Sakamoto struct snd_oxfw_stream_formation *formation) 4215cd1d3f4STakashi Sakamoto { 4225cd1d3f4STakashi Sakamoto unsigned int i, e, channels, type; 4235cd1d3f4STakashi Sakamoto 4245cd1d3f4STakashi Sakamoto memset(formation, 0, sizeof(struct snd_oxfw_stream_formation)); 4255cd1d3f4STakashi Sakamoto 4265cd1d3f4STakashi Sakamoto /* 4275cd1d3f4STakashi Sakamoto * this module can support a hierarchy combination that: 4285cd1d3f4STakashi Sakamoto * Root: Audio and Music (0x90) 4295cd1d3f4STakashi Sakamoto * Level 1: AM824 Compound (0x40) 4305cd1d3f4STakashi Sakamoto */ 4315cd1d3f4STakashi Sakamoto if ((format[0] != 0x90) || (format[1] != 0x40)) 4325cd1d3f4STakashi Sakamoto return -ENOSYS; 4335cd1d3f4STakashi Sakamoto 4345cd1d3f4STakashi Sakamoto /* check the sampling rate */ 4355cd1d3f4STakashi Sakamoto for (i = 0; i < ARRAY_SIZE(avc_stream_rate_table); i++) { 4365cd1d3f4STakashi Sakamoto if (format[2] == avc_stream_rate_table[i]) 4375cd1d3f4STakashi Sakamoto break; 4385cd1d3f4STakashi Sakamoto } 4395cd1d3f4STakashi Sakamoto if (i == ARRAY_SIZE(avc_stream_rate_table)) 4405cd1d3f4STakashi Sakamoto return -ENOSYS; 4415cd1d3f4STakashi Sakamoto 4425cd1d3f4STakashi Sakamoto formation->rate = oxfw_rate_table[i]; 4435cd1d3f4STakashi Sakamoto 4445cd1d3f4STakashi Sakamoto for (e = 0; e < format[4]; e++) { 4455cd1d3f4STakashi Sakamoto channels = format[5 + e * 2]; 4465cd1d3f4STakashi Sakamoto type = format[6 + e * 2]; 4475cd1d3f4STakashi Sakamoto 4485cd1d3f4STakashi Sakamoto switch (type) { 4495cd1d3f4STakashi Sakamoto /* IEC 60958 Conformant, currently handled as MBLA */ 4505cd1d3f4STakashi Sakamoto case 0x00: 4515cd1d3f4STakashi Sakamoto /* Multi Bit Linear Audio (Raw) */ 4525cd1d3f4STakashi Sakamoto case 0x06: 4535cd1d3f4STakashi Sakamoto formation->pcm += channels; 4545cd1d3f4STakashi Sakamoto break; 4555cd1d3f4STakashi Sakamoto /* MIDI Conformant */ 4565cd1d3f4STakashi Sakamoto case 0x0d: 4575cd1d3f4STakashi Sakamoto formation->midi = channels; 4585cd1d3f4STakashi Sakamoto break; 4595cd1d3f4STakashi Sakamoto /* IEC 61937-3 to 7 */ 4605cd1d3f4STakashi Sakamoto case 0x01: 4615cd1d3f4STakashi Sakamoto case 0x02: 4625cd1d3f4STakashi Sakamoto case 0x03: 4635cd1d3f4STakashi Sakamoto case 0x04: 4645cd1d3f4STakashi Sakamoto case 0x05: 4655cd1d3f4STakashi Sakamoto /* Multi Bit Linear Audio */ 4665cd1d3f4STakashi Sakamoto case 0x07: /* DVD-Audio */ 4675cd1d3f4STakashi Sakamoto case 0x0c: /* High Precision */ 4685cd1d3f4STakashi Sakamoto /* One Bit Audio */ 4695cd1d3f4STakashi Sakamoto case 0x08: /* (Plain) Raw */ 4705cd1d3f4STakashi Sakamoto case 0x09: /* (Plain) SACD */ 4715cd1d3f4STakashi Sakamoto case 0x0a: /* (Encoded) Raw */ 4725cd1d3f4STakashi Sakamoto case 0x0b: /* (Encoded) SACD */ 4735cd1d3f4STakashi Sakamoto /* SMPTE Time-Code conformant */ 4745cd1d3f4STakashi Sakamoto case 0x0e: 4755cd1d3f4STakashi Sakamoto /* Sample Count */ 4765cd1d3f4STakashi Sakamoto case 0x0f: 4775cd1d3f4STakashi Sakamoto /* Anciliary Data */ 4785cd1d3f4STakashi Sakamoto case 0x10: 4795cd1d3f4STakashi Sakamoto /* Synchronization Stream (Stereo Raw audio) */ 4805cd1d3f4STakashi Sakamoto case 0x40: 4815cd1d3f4STakashi Sakamoto /* Don't care */ 4825cd1d3f4STakashi Sakamoto case 0xff: 4835cd1d3f4STakashi Sakamoto default: 4845cd1d3f4STakashi Sakamoto return -ENOSYS; /* not supported */ 4855cd1d3f4STakashi Sakamoto } 4865cd1d3f4STakashi Sakamoto } 4875cd1d3f4STakashi Sakamoto 48849c7b3fcSTakashi Sakamoto if (formation->pcm > AM824_MAX_CHANNELS_FOR_PCM || 48949c7b3fcSTakashi Sakamoto formation->midi > AM824_MAX_CHANNELS_FOR_MIDI) 4905cd1d3f4STakashi Sakamoto return -ENOSYS; 4915cd1d3f4STakashi Sakamoto 4925cd1d3f4STakashi Sakamoto return 0; 4935cd1d3f4STakashi Sakamoto } 4945cd1d3f4STakashi Sakamoto 4955cd1d3f4STakashi Sakamoto static int 4965cd1d3f4STakashi Sakamoto assume_stream_formats(struct snd_oxfw *oxfw, enum avc_general_plug_dir dir, 4975cd1d3f4STakashi Sakamoto unsigned int pid, u8 *buf, unsigned int *len, 4985cd1d3f4STakashi Sakamoto u8 **formats) 4995cd1d3f4STakashi Sakamoto { 5005cd1d3f4STakashi Sakamoto struct snd_oxfw_stream_formation formation; 5015cd1d3f4STakashi Sakamoto unsigned int i, eid; 5025cd1d3f4STakashi Sakamoto int err; 5035cd1d3f4STakashi Sakamoto 5045cd1d3f4STakashi Sakamoto /* get format at current sampling rate */ 5055cd1d3f4STakashi Sakamoto err = avc_stream_get_format_single(oxfw->unit, dir, pid, buf, len); 5065cd1d3f4STakashi Sakamoto if (err < 0) { 5075cd1d3f4STakashi Sakamoto dev_err(&oxfw->unit->device, 5085cd1d3f4STakashi Sakamoto "fail to get current stream format for isoc %s plug %d:%d\n", 5095cd1d3f4STakashi Sakamoto (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : "out", 5105cd1d3f4STakashi Sakamoto pid, err); 5115cd1d3f4STakashi Sakamoto goto end; 5125cd1d3f4STakashi Sakamoto } 5135cd1d3f4STakashi Sakamoto 5145cd1d3f4STakashi Sakamoto /* parse and set stream format */ 5155cd1d3f4STakashi Sakamoto eid = 0; 5165cd1d3f4STakashi Sakamoto err = snd_oxfw_stream_parse_format(buf, &formation); 5175cd1d3f4STakashi Sakamoto if (err < 0) 5185cd1d3f4STakashi Sakamoto goto end; 5195cd1d3f4STakashi Sakamoto 520cd3b7116STakashi Sakamoto formats[eid] = devm_kmemdup(&oxfw->card->card_dev, buf, *len, 521cd3b7116STakashi Sakamoto GFP_KERNEL); 522cd3b7116STakashi Sakamoto if (!formats[eid]) { 5235cd1d3f4STakashi Sakamoto err = -ENOMEM; 5245cd1d3f4STakashi Sakamoto goto end; 5255cd1d3f4STakashi Sakamoto } 5265cd1d3f4STakashi Sakamoto 5275cd1d3f4STakashi Sakamoto /* apply the format for each available sampling rate */ 5285cd1d3f4STakashi Sakamoto for (i = 0; i < ARRAY_SIZE(oxfw_rate_table); i++) { 5295cd1d3f4STakashi Sakamoto if (formation.rate == oxfw_rate_table[i]) 5305cd1d3f4STakashi Sakamoto continue; 5315cd1d3f4STakashi Sakamoto 5325cd1d3f4STakashi Sakamoto err = avc_general_inquiry_sig_fmt(oxfw->unit, 5335cd1d3f4STakashi Sakamoto oxfw_rate_table[i], 5345cd1d3f4STakashi Sakamoto dir, pid); 5355cd1d3f4STakashi Sakamoto if (err < 0) 5365cd1d3f4STakashi Sakamoto continue; 5375cd1d3f4STakashi Sakamoto 5385cd1d3f4STakashi Sakamoto eid++; 539cd3b7116STakashi Sakamoto formats[eid] = devm_kmemdup(&oxfw->card->card_dev, buf, *len, 540cd3b7116STakashi Sakamoto GFP_KERNEL); 5415cd1d3f4STakashi Sakamoto if (formats[eid] == NULL) { 5425cd1d3f4STakashi Sakamoto err = -ENOMEM; 5435cd1d3f4STakashi Sakamoto goto end; 5445cd1d3f4STakashi Sakamoto } 5455cd1d3f4STakashi Sakamoto formats[eid][2] = avc_stream_rate_table[i]; 5465cd1d3f4STakashi Sakamoto } 5475cd1d3f4STakashi Sakamoto 5485cd1d3f4STakashi Sakamoto err = 0; 5495cd1d3f4STakashi Sakamoto oxfw->assumed = true; 5505cd1d3f4STakashi Sakamoto end: 5515cd1d3f4STakashi Sakamoto return err; 5525cd1d3f4STakashi Sakamoto } 5535cd1d3f4STakashi Sakamoto 5545cd1d3f4STakashi Sakamoto static int fill_stream_formats(struct snd_oxfw *oxfw, 5555cd1d3f4STakashi Sakamoto enum avc_general_plug_dir dir, 5565cd1d3f4STakashi Sakamoto unsigned short pid) 5575cd1d3f4STakashi Sakamoto { 5585cd1d3f4STakashi Sakamoto u8 *buf, **formats; 5595cd1d3f4STakashi Sakamoto unsigned int len, eid = 0; 5605cd1d3f4STakashi Sakamoto struct snd_oxfw_stream_formation dummy; 5615cd1d3f4STakashi Sakamoto int err; 5625cd1d3f4STakashi Sakamoto 5635cd1d3f4STakashi Sakamoto buf = kmalloc(AVC_GENERIC_FRAME_MAXIMUM_BYTES, GFP_KERNEL); 5645cd1d3f4STakashi Sakamoto if (buf == NULL) 5655cd1d3f4STakashi Sakamoto return -ENOMEM; 5665cd1d3f4STakashi Sakamoto 567b0ac0009STakashi Sakamoto if (dir == AVC_GENERAL_PLUG_DIR_OUT) 568b0ac0009STakashi Sakamoto formats = oxfw->tx_stream_formats; 569b0ac0009STakashi Sakamoto else 5705cd1d3f4STakashi Sakamoto formats = oxfw->rx_stream_formats; 5715cd1d3f4STakashi Sakamoto 5725cd1d3f4STakashi Sakamoto /* get first entry */ 5735cd1d3f4STakashi Sakamoto len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 5745cd1d3f4STakashi Sakamoto err = avc_stream_get_format_list(oxfw->unit, dir, 0, buf, &len, 0); 5755cd1d3f4STakashi Sakamoto if (err == -ENOSYS) { 5765cd1d3f4STakashi Sakamoto /* LIST subfunction is not implemented */ 5775cd1d3f4STakashi Sakamoto len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 5785cd1d3f4STakashi Sakamoto err = assume_stream_formats(oxfw, dir, pid, buf, &len, 5795cd1d3f4STakashi Sakamoto formats); 5805cd1d3f4STakashi Sakamoto goto end; 5815cd1d3f4STakashi Sakamoto } else if (err < 0) { 5825cd1d3f4STakashi Sakamoto dev_err(&oxfw->unit->device, 5835cd1d3f4STakashi Sakamoto "fail to get stream format %d for isoc %s plug %d:%d\n", 5845cd1d3f4STakashi Sakamoto eid, (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : "out", 5855cd1d3f4STakashi Sakamoto pid, err); 5865cd1d3f4STakashi Sakamoto goto end; 5875cd1d3f4STakashi Sakamoto } 5885cd1d3f4STakashi Sakamoto 5895cd1d3f4STakashi Sakamoto /* LIST subfunction is implemented */ 5905cd1d3f4STakashi Sakamoto while (eid < SND_OXFW_STREAM_FORMAT_ENTRIES) { 5915cd1d3f4STakashi Sakamoto /* The format is too short. */ 5925cd1d3f4STakashi Sakamoto if (len < 3) { 5935cd1d3f4STakashi Sakamoto err = -EIO; 5945cd1d3f4STakashi Sakamoto break; 5955cd1d3f4STakashi Sakamoto } 5965cd1d3f4STakashi Sakamoto 5975cd1d3f4STakashi Sakamoto /* parse and set stream format */ 5985cd1d3f4STakashi Sakamoto err = snd_oxfw_stream_parse_format(buf, &dummy); 5995cd1d3f4STakashi Sakamoto if (err < 0) 6005cd1d3f4STakashi Sakamoto break; 6015cd1d3f4STakashi Sakamoto 602cd3b7116STakashi Sakamoto formats[eid] = devm_kmemdup(&oxfw->card->card_dev, buf, len, 603cd3b7116STakashi Sakamoto GFP_KERNEL); 604cd3b7116STakashi Sakamoto if (!formats[eid]) { 6055cd1d3f4STakashi Sakamoto err = -ENOMEM; 6065cd1d3f4STakashi Sakamoto break; 6075cd1d3f4STakashi Sakamoto } 6085cd1d3f4STakashi Sakamoto 6095cd1d3f4STakashi Sakamoto /* get next entry */ 6105cd1d3f4STakashi Sakamoto len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 6115cd1d3f4STakashi Sakamoto err = avc_stream_get_format_list(oxfw->unit, dir, 0, 6125cd1d3f4STakashi Sakamoto buf, &len, ++eid); 6135cd1d3f4STakashi Sakamoto /* No entries remained. */ 6145cd1d3f4STakashi Sakamoto if (err == -EINVAL) { 6155cd1d3f4STakashi Sakamoto err = 0; 6165cd1d3f4STakashi Sakamoto break; 6175cd1d3f4STakashi Sakamoto } else if (err < 0) { 6185cd1d3f4STakashi Sakamoto dev_err(&oxfw->unit->device, 6195cd1d3f4STakashi Sakamoto "fail to get stream format %d for isoc %s plug %d:%d\n", 6205cd1d3f4STakashi Sakamoto eid, (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : 6215cd1d3f4STakashi Sakamoto "out", 6225cd1d3f4STakashi Sakamoto pid, err); 6235cd1d3f4STakashi Sakamoto break; 6245cd1d3f4STakashi Sakamoto } 6255cd1d3f4STakashi Sakamoto } 6265cd1d3f4STakashi Sakamoto end: 6275cd1d3f4STakashi Sakamoto kfree(buf); 6285cd1d3f4STakashi Sakamoto return err; 6295cd1d3f4STakashi Sakamoto } 6305cd1d3f4STakashi Sakamoto 6315cd1d3f4STakashi Sakamoto int snd_oxfw_stream_discover(struct snd_oxfw *oxfw) 6325cd1d3f4STakashi Sakamoto { 6335cd1d3f4STakashi Sakamoto u8 plugs[AVC_PLUG_INFO_BUF_BYTES]; 63432056041STakashi Sakamoto struct snd_oxfw_stream_formation formation; 63532056041STakashi Sakamoto u8 *format; 63632056041STakashi Sakamoto unsigned int i; 6375cd1d3f4STakashi Sakamoto int err; 6385cd1d3f4STakashi Sakamoto 6395cd1d3f4STakashi Sakamoto /* the number of plugs for isoc in/out, ext in/out */ 6405cd1d3f4STakashi Sakamoto err = avc_general_get_plug_info(oxfw->unit, 0x1f, 0x07, 0x00, plugs); 6415cd1d3f4STakashi Sakamoto if (err < 0) { 6425cd1d3f4STakashi Sakamoto dev_err(&oxfw->unit->device, 6435cd1d3f4STakashi Sakamoto "fail to get info for isoc/external in/out plugs: %d\n", 6445cd1d3f4STakashi Sakamoto err); 6455cd1d3f4STakashi Sakamoto goto end; 646b0ac0009STakashi Sakamoto } else if ((plugs[0] == 0) && (plugs[1] == 0)) { 6475cd1d3f4STakashi Sakamoto err = -ENOSYS; 6485cd1d3f4STakashi Sakamoto goto end; 6495cd1d3f4STakashi Sakamoto } 6505cd1d3f4STakashi Sakamoto 651b0ac0009STakashi Sakamoto /* use oPCR[0] if exists */ 652b0ac0009STakashi Sakamoto if (plugs[1] > 0) { 653b0ac0009STakashi Sakamoto err = fill_stream_formats(oxfw, AVC_GENERAL_PLUG_DIR_OUT, 0); 654b0ac0009STakashi Sakamoto if (err < 0) 655b0ac0009STakashi Sakamoto goto end; 65632056041STakashi Sakamoto 65732056041STakashi Sakamoto for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 65832056041STakashi Sakamoto format = oxfw->tx_stream_formats[i]; 65932056041STakashi Sakamoto if (format == NULL) 66032056041STakashi Sakamoto continue; 66132056041STakashi Sakamoto err = snd_oxfw_stream_parse_format(format, &formation); 66232056041STakashi Sakamoto if (err < 0) 66332056041STakashi Sakamoto continue; 66432056041STakashi Sakamoto 66532056041STakashi Sakamoto /* Add one MIDI port. */ 66632056041STakashi Sakamoto if (formation.midi > 0) 66732056041STakashi Sakamoto oxfw->midi_input_ports = 1; 66832056041STakashi Sakamoto } 66932056041STakashi Sakamoto 670b0ac0009STakashi Sakamoto oxfw->has_output = true; 671b0ac0009STakashi Sakamoto } 672b0ac0009STakashi Sakamoto 6735cd1d3f4STakashi Sakamoto /* use iPCR[0] if exists */ 67432056041STakashi Sakamoto if (plugs[0] > 0) { 6755cd1d3f4STakashi Sakamoto err = fill_stream_formats(oxfw, AVC_GENERAL_PLUG_DIR_IN, 0); 67632056041STakashi Sakamoto if (err < 0) 67732056041STakashi Sakamoto goto end; 67832056041STakashi Sakamoto 67932056041STakashi Sakamoto for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 68032056041STakashi Sakamoto format = oxfw->rx_stream_formats[i]; 68132056041STakashi Sakamoto if (format == NULL) 68232056041STakashi Sakamoto continue; 68332056041STakashi Sakamoto err = snd_oxfw_stream_parse_format(format, &formation); 68432056041STakashi Sakamoto if (err < 0) 68532056041STakashi Sakamoto continue; 68632056041STakashi Sakamoto 68732056041STakashi Sakamoto /* Add one MIDI port. */ 68832056041STakashi Sakamoto if (formation.midi > 0) 68932056041STakashi Sakamoto oxfw->midi_output_ports = 1; 69032056041STakashi Sakamoto } 69132056041STakashi Sakamoto } 6925cd1d3f4STakashi Sakamoto end: 6935cd1d3f4STakashi Sakamoto return err; 6945cd1d3f4STakashi Sakamoto } 6958985f4acSTakashi Sakamoto 6968985f4acSTakashi Sakamoto void snd_oxfw_stream_lock_changed(struct snd_oxfw *oxfw) 6978985f4acSTakashi Sakamoto { 6988985f4acSTakashi Sakamoto oxfw->dev_lock_changed = true; 6998985f4acSTakashi Sakamoto wake_up(&oxfw->hwdep_wait); 7008985f4acSTakashi Sakamoto } 7018985f4acSTakashi Sakamoto 7028985f4acSTakashi Sakamoto int snd_oxfw_stream_lock_try(struct snd_oxfw *oxfw) 7038985f4acSTakashi Sakamoto { 7048985f4acSTakashi Sakamoto int err; 7058985f4acSTakashi Sakamoto 7068985f4acSTakashi Sakamoto spin_lock_irq(&oxfw->lock); 7078985f4acSTakashi Sakamoto 7088985f4acSTakashi Sakamoto /* user land lock this */ 7098985f4acSTakashi Sakamoto if (oxfw->dev_lock_count < 0) { 7108985f4acSTakashi Sakamoto err = -EBUSY; 7118985f4acSTakashi Sakamoto goto end; 7128985f4acSTakashi Sakamoto } 7138985f4acSTakashi Sakamoto 7148985f4acSTakashi Sakamoto /* this is the first time */ 7158985f4acSTakashi Sakamoto if (oxfw->dev_lock_count++ == 0) 7168985f4acSTakashi Sakamoto snd_oxfw_stream_lock_changed(oxfw); 7178985f4acSTakashi Sakamoto err = 0; 7188985f4acSTakashi Sakamoto end: 7198985f4acSTakashi Sakamoto spin_unlock_irq(&oxfw->lock); 7208985f4acSTakashi Sakamoto return err; 7218985f4acSTakashi Sakamoto } 7228985f4acSTakashi Sakamoto 7238985f4acSTakashi Sakamoto void snd_oxfw_stream_lock_release(struct snd_oxfw *oxfw) 7248985f4acSTakashi Sakamoto { 7258985f4acSTakashi Sakamoto spin_lock_irq(&oxfw->lock); 7268985f4acSTakashi Sakamoto 7278985f4acSTakashi Sakamoto if (WARN_ON(oxfw->dev_lock_count <= 0)) 7288985f4acSTakashi Sakamoto goto end; 7298985f4acSTakashi Sakamoto if (--oxfw->dev_lock_count == 0) 7308985f4acSTakashi Sakamoto snd_oxfw_stream_lock_changed(oxfw); 7318985f4acSTakashi Sakamoto end: 7328985f4acSTakashi Sakamoto spin_unlock_irq(&oxfw->lock); 7338985f4acSTakashi Sakamoto } 734