1da607e19SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2e2786ca6STakashi Sakamoto /* 3e2786ca6STakashi Sakamoto * oxfw_stream.c - a part of driver for OXFW970/971 based devices 4e2786ca6STakashi Sakamoto * 5e2786ca6STakashi Sakamoto * Copyright (c) 2014 Takashi Sakamoto 6e2786ca6STakashi Sakamoto */ 7e2786ca6STakashi Sakamoto 8e2786ca6STakashi Sakamoto #include "oxfw.h" 9f3699e2cSTakashi Sakamoto #include <linux/delay.h> 10e2786ca6STakashi Sakamoto 115cd1d3f4STakashi Sakamoto #define AVC_GENERIC_FRAME_MAXIMUM_BYTES 512 12f3699e2cSTakashi Sakamoto #define CALLBACK_TIMEOUT 200 135cd1d3f4STakashi Sakamoto 145cd1d3f4STakashi Sakamoto /* 155cd1d3f4STakashi Sakamoto * According to datasheet of Oxford Semiconductor: 165cd1d3f4STakashi Sakamoto * OXFW970: 32.0/44.1/48.0/96.0 Khz, 8 audio channels I/O 175cd1d3f4STakashi Sakamoto * OXFW971: 32.0/44.1/48.0/88.2/96.0/192.0 kHz, 16 audio channels I/O, MIDI I/O 185cd1d3f4STakashi Sakamoto */ 195cd1d3f4STakashi Sakamoto static const unsigned int oxfw_rate_table[] = { 205cd1d3f4STakashi Sakamoto [0] = 32000, 215cd1d3f4STakashi Sakamoto [1] = 44100, 225cd1d3f4STakashi Sakamoto [2] = 48000, 235cd1d3f4STakashi Sakamoto [3] = 88200, 245cd1d3f4STakashi Sakamoto [4] = 96000, 255cd1d3f4STakashi Sakamoto [5] = 192000, 265cd1d3f4STakashi Sakamoto }; 275cd1d3f4STakashi Sakamoto 285cd1d3f4STakashi Sakamoto /* 295cd1d3f4STakashi Sakamoto * See Table 5.7 – Sampling frequency for Multi-bit Audio 305cd1d3f4STakashi Sakamoto * in AV/C Stream Format Information Specification 1.1 (Apr 2005, 1394TA) 315cd1d3f4STakashi Sakamoto */ 325cd1d3f4STakashi Sakamoto static const unsigned int avc_stream_rate_table[] = { 335cd1d3f4STakashi Sakamoto [0] = 0x02, 345cd1d3f4STakashi Sakamoto [1] = 0x03, 355cd1d3f4STakashi Sakamoto [2] = 0x04, 365cd1d3f4STakashi Sakamoto [3] = 0x0a, 375cd1d3f4STakashi Sakamoto [4] = 0x05, 385cd1d3f4STakashi Sakamoto [5] = 0x07, 395cd1d3f4STakashi Sakamoto }; 405cd1d3f4STakashi Sakamoto 41b0ac0009STakashi Sakamoto static int set_rate(struct snd_oxfw *oxfw, unsigned int rate) 42b0ac0009STakashi Sakamoto { 43b0ac0009STakashi Sakamoto int err; 44b0ac0009STakashi Sakamoto 45b0ac0009STakashi Sakamoto err = avc_general_set_sig_fmt(oxfw->unit, rate, 46b0ac0009STakashi Sakamoto AVC_GENERAL_PLUG_DIR_IN, 0); 47b0ac0009STakashi Sakamoto if (err < 0) 48b0ac0009STakashi Sakamoto goto end; 49b0ac0009STakashi Sakamoto 50b0ac0009STakashi Sakamoto if (oxfw->has_output) 51b0ac0009STakashi Sakamoto err = avc_general_set_sig_fmt(oxfw->unit, rate, 52b0ac0009STakashi Sakamoto AVC_GENERAL_PLUG_DIR_OUT, 0); 53b0ac0009STakashi Sakamoto end: 54b0ac0009STakashi Sakamoto return err; 55b0ac0009STakashi Sakamoto } 56b0ac0009STakashi Sakamoto 57f3699e2cSTakashi Sakamoto static int set_stream_format(struct snd_oxfw *oxfw, struct amdtp_stream *s, 58f3699e2cSTakashi Sakamoto unsigned int rate, unsigned int pcm_channels) 59f3699e2cSTakashi Sakamoto { 60f3699e2cSTakashi Sakamoto u8 **formats; 61f3699e2cSTakashi Sakamoto struct snd_oxfw_stream_formation formation; 62f3699e2cSTakashi Sakamoto enum avc_general_plug_dir dir; 635580ba7bSDan Carpenter unsigned int len; 645580ba7bSDan Carpenter int i, err; 65f3699e2cSTakashi Sakamoto 66b0ac0009STakashi Sakamoto if (s == &oxfw->tx_stream) { 67b0ac0009STakashi Sakamoto formats = oxfw->tx_stream_formats; 68b0ac0009STakashi Sakamoto dir = AVC_GENERAL_PLUG_DIR_OUT; 69b0ac0009STakashi Sakamoto } else { 70f3699e2cSTakashi Sakamoto formats = oxfw->rx_stream_formats; 71f3699e2cSTakashi Sakamoto dir = AVC_GENERAL_PLUG_DIR_IN; 72b0ac0009STakashi Sakamoto } 73f3699e2cSTakashi Sakamoto 74f3699e2cSTakashi Sakamoto /* Seek stream format for requirements. */ 75f3699e2cSTakashi Sakamoto for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 76f3699e2cSTakashi Sakamoto err = snd_oxfw_stream_parse_format(formats[i], &formation); 77f3699e2cSTakashi Sakamoto if (err < 0) 78f3699e2cSTakashi Sakamoto return err; 79f3699e2cSTakashi Sakamoto 80f3699e2cSTakashi Sakamoto if ((formation.rate == rate) && (formation.pcm == pcm_channels)) 81f3699e2cSTakashi Sakamoto break; 82f3699e2cSTakashi Sakamoto } 83f3699e2cSTakashi Sakamoto if (i == SND_OXFW_STREAM_FORMAT_ENTRIES) 84f3699e2cSTakashi Sakamoto return -EINVAL; 85f3699e2cSTakashi Sakamoto 86f3699e2cSTakashi Sakamoto /* If assumed, just change rate. */ 87f3699e2cSTakashi Sakamoto if (oxfw->assumed) 88b0ac0009STakashi Sakamoto return set_rate(oxfw, rate); 89f3699e2cSTakashi Sakamoto 90f3699e2cSTakashi Sakamoto /* Calculate format length. */ 91f3699e2cSTakashi Sakamoto len = 5 + formats[i][4] * 2; 92f3699e2cSTakashi Sakamoto 93f3699e2cSTakashi Sakamoto err = avc_stream_set_format(oxfw->unit, dir, 0, formats[i], len); 94f3699e2cSTakashi Sakamoto if (err < 0) 95f3699e2cSTakashi Sakamoto return err; 96f3699e2cSTakashi Sakamoto 97f3699e2cSTakashi Sakamoto /* Some requests just after changing format causes freezing. */ 98f3699e2cSTakashi Sakamoto msleep(100); 99f3699e2cSTakashi Sakamoto 100f3699e2cSTakashi Sakamoto return 0; 101f3699e2cSTakashi Sakamoto } 102f3699e2cSTakashi Sakamoto 103b0ac0009STakashi Sakamoto static void stop_stream(struct snd_oxfw *oxfw, struct amdtp_stream *stream) 104e2786ca6STakashi Sakamoto { 105b0ac0009STakashi Sakamoto amdtp_stream_pcm_abort(stream); 106b0ac0009STakashi Sakamoto amdtp_stream_stop(stream); 107e2786ca6STakashi Sakamoto 108b0ac0009STakashi Sakamoto if (stream == &oxfw->tx_stream) 109b0ac0009STakashi Sakamoto cmp_connection_break(&oxfw->out_conn); 110b0ac0009STakashi Sakamoto else 111e2786ca6STakashi Sakamoto cmp_connection_break(&oxfw->in_conn); 112e2786ca6STakashi Sakamoto } 113e2786ca6STakashi Sakamoto 114b0ac0009STakashi Sakamoto static int start_stream(struct snd_oxfw *oxfw, struct amdtp_stream *stream, 115b0ac0009STakashi Sakamoto unsigned int rate, unsigned int pcm_channels) 116e2786ca6STakashi Sakamoto { 117f3699e2cSTakashi Sakamoto u8 **formats; 118f3699e2cSTakashi Sakamoto struct cmp_connection *conn; 119f3699e2cSTakashi Sakamoto struct snd_oxfw_stream_formation formation; 120f3699e2cSTakashi Sakamoto unsigned int i, midi_ports; 121f3699e2cSTakashi Sakamoto int err; 122f3699e2cSTakashi Sakamoto 123b0ac0009STakashi Sakamoto if (stream == &oxfw->rx_stream) { 124f3699e2cSTakashi Sakamoto formats = oxfw->rx_stream_formats; 125f3699e2cSTakashi Sakamoto conn = &oxfw->in_conn; 126b0ac0009STakashi Sakamoto } else { 127b0ac0009STakashi Sakamoto formats = oxfw->tx_stream_formats; 128b0ac0009STakashi Sakamoto conn = &oxfw->out_conn; 129b0ac0009STakashi Sakamoto } 130f3699e2cSTakashi Sakamoto 131b0ac0009STakashi Sakamoto /* Get stream format */ 132f3699e2cSTakashi Sakamoto for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 133f3699e2cSTakashi Sakamoto if (formats[i] == NULL) 134f3699e2cSTakashi Sakamoto break; 135f3699e2cSTakashi Sakamoto 136f3699e2cSTakashi Sakamoto err = snd_oxfw_stream_parse_format(formats[i], &formation); 137f3699e2cSTakashi Sakamoto if (err < 0) 138f3699e2cSTakashi Sakamoto goto end; 139f3699e2cSTakashi Sakamoto if (rate != formation.rate) 140f3699e2cSTakashi Sakamoto continue; 141f3699e2cSTakashi Sakamoto if (pcm_channels == 0 || pcm_channels == formation.pcm) 142f3699e2cSTakashi Sakamoto break; 143f3699e2cSTakashi Sakamoto } 144f3699e2cSTakashi Sakamoto if (i == SND_OXFW_STREAM_FORMAT_ENTRIES) { 145f3699e2cSTakashi Sakamoto err = -EINVAL; 146f3699e2cSTakashi Sakamoto goto end; 147f3699e2cSTakashi Sakamoto } 148f3699e2cSTakashi Sakamoto 149f3699e2cSTakashi Sakamoto pcm_channels = formation.pcm; 150bb71da43STakashi Sakamoto midi_ports = formation.midi * 8; 151f3699e2cSTakashi Sakamoto 152f3699e2cSTakashi Sakamoto /* The stream should have one pcm channels at least */ 153f3699e2cSTakashi Sakamoto if (pcm_channels == 0) { 154f3699e2cSTakashi Sakamoto err = -EINVAL; 155f3699e2cSTakashi Sakamoto goto end; 156f3699e2cSTakashi Sakamoto } 15751c29fd2STakashi Sakamoto err = amdtp_am824_set_parameters(stream, rate, pcm_channels, midi_ports, 15851c29fd2STakashi Sakamoto false); 159547e631cSTakashi Sakamoto if (err < 0) 160547e631cSTakashi Sakamoto goto end; 161f3699e2cSTakashi Sakamoto 162f3699e2cSTakashi Sakamoto err = cmp_connection_establish(conn, 163f3699e2cSTakashi Sakamoto amdtp_stream_get_max_payload(stream)); 164f3699e2cSTakashi Sakamoto if (err < 0) 165f3699e2cSTakashi Sakamoto goto end; 166f3699e2cSTakashi Sakamoto 167f3699e2cSTakashi Sakamoto err = amdtp_stream_start(stream, 168f3699e2cSTakashi Sakamoto conn->resources.channel, 169f3699e2cSTakashi Sakamoto conn->speed); 170f3699e2cSTakashi Sakamoto if (err < 0) { 171f3699e2cSTakashi Sakamoto cmp_connection_break(conn); 172f3699e2cSTakashi Sakamoto goto end; 173f3699e2cSTakashi Sakamoto } 174f3699e2cSTakashi Sakamoto 175f3699e2cSTakashi Sakamoto /* Wait first packet */ 176f2b14c0bSTakashi Sakamoto if (!amdtp_stream_wait_callback(stream, CALLBACK_TIMEOUT)) { 177b0ac0009STakashi Sakamoto stop_stream(oxfw, stream); 178f2b14c0bSTakashi Sakamoto err = -ETIMEDOUT; 179f2b14c0bSTakashi Sakamoto } 180f3699e2cSTakashi Sakamoto end: 181f3699e2cSTakashi Sakamoto return err; 182f3699e2cSTakashi Sakamoto } 183f3699e2cSTakashi Sakamoto 184b0ac0009STakashi Sakamoto static int check_connection_used_by_others(struct snd_oxfw *oxfw, 185b0ac0009STakashi Sakamoto struct amdtp_stream *stream) 186f3699e2cSTakashi Sakamoto { 187b0ac0009STakashi Sakamoto struct cmp_connection *conn; 188b0ac0009STakashi Sakamoto bool used; 189b0ac0009STakashi Sakamoto int err; 190b0ac0009STakashi Sakamoto 191b0ac0009STakashi Sakamoto if (stream == &oxfw->tx_stream) 192b0ac0009STakashi Sakamoto conn = &oxfw->out_conn; 193b0ac0009STakashi Sakamoto else 194b0ac0009STakashi Sakamoto conn = &oxfw->in_conn; 195b0ac0009STakashi Sakamoto 196b0ac0009STakashi Sakamoto err = cmp_connection_check_used(conn, &used); 197b0ac0009STakashi Sakamoto if ((err >= 0) && used && !amdtp_stream_running(stream)) { 198b0ac0009STakashi Sakamoto dev_err(&oxfw->unit->device, 199b0ac0009STakashi Sakamoto "Connection established by others: %cPCR[%d]\n", 200b0ac0009STakashi Sakamoto (conn->direction == CMP_OUTPUT) ? 'o' : 'i', 201b0ac0009STakashi Sakamoto conn->pcr_index); 202b0ac0009STakashi Sakamoto err = -EBUSY; 203b0ac0009STakashi Sakamoto } 204b0ac0009STakashi Sakamoto 205b0ac0009STakashi Sakamoto return err; 206b0ac0009STakashi Sakamoto } 207b0ac0009STakashi Sakamoto 208b0ac0009STakashi Sakamoto int snd_oxfw_stream_init_simplex(struct snd_oxfw *oxfw, 209b0ac0009STakashi Sakamoto struct amdtp_stream *stream) 210b0ac0009STakashi Sakamoto { 211b0ac0009STakashi Sakamoto struct cmp_connection *conn; 212b0ac0009STakashi Sakamoto enum cmp_direction c_dir; 213b0ac0009STakashi Sakamoto enum amdtp_stream_direction s_dir; 214b0ac0009STakashi Sakamoto int err; 215b0ac0009STakashi Sakamoto 216b0ac0009STakashi Sakamoto if (stream == &oxfw->tx_stream) { 217b0ac0009STakashi Sakamoto conn = &oxfw->out_conn; 218b0ac0009STakashi Sakamoto c_dir = CMP_OUTPUT; 219b0ac0009STakashi Sakamoto s_dir = AMDTP_IN_STREAM; 220b0ac0009STakashi Sakamoto } else { 221b0ac0009STakashi Sakamoto conn = &oxfw->in_conn; 222b0ac0009STakashi Sakamoto c_dir = CMP_INPUT; 223b0ac0009STakashi Sakamoto s_dir = AMDTP_OUT_STREAM; 224b0ac0009STakashi Sakamoto } 225b0ac0009STakashi Sakamoto 226b0ac0009STakashi Sakamoto err = cmp_connection_init(conn, oxfw->unit, c_dir, 0); 227b0ac0009STakashi Sakamoto if (err < 0) 228b0ac0009STakashi Sakamoto goto end; 229b0ac0009STakashi Sakamoto 2305955815eSTakashi Sakamoto err = amdtp_am824_init(stream, oxfw->unit, s_dir, CIP_NONBLOCKING); 231b0ac0009STakashi Sakamoto if (err < 0) { 232b0ac0009STakashi Sakamoto amdtp_stream_destroy(stream); 233b0ac0009STakashi Sakamoto cmp_connection_destroy(conn); 234b0ac0009STakashi Sakamoto goto end; 235b0ac0009STakashi Sakamoto } 236b0ac0009STakashi Sakamoto 237a2064710STakashi Sakamoto /* 238a2064710STakashi Sakamoto * OXFW starts to transmit packets with non-zero dbc. 239a2064710STakashi Sakamoto * OXFW postpone transferring packets till handling any asynchronous 240a2064710STakashi Sakamoto * packets. As a result, next isochronous packet includes more data 241a2064710STakashi Sakamoto * blocks than IEC 61883-6 defines. 242a2064710STakashi Sakamoto */ 24313f3a46dSTakashi Sakamoto if (stream == &oxfw->tx_stream) { 24462f00e40STakashi Sakamoto oxfw->tx_stream.flags |= CIP_JUMBO_PAYLOAD; 24513f3a46dSTakashi Sakamoto if (oxfw->wrong_dbs) 24613f3a46dSTakashi Sakamoto oxfw->tx_stream.flags |= CIP_WRONG_DBS; 24713f3a46dSTakashi Sakamoto } 248b0ac0009STakashi Sakamoto end: 249b0ac0009STakashi Sakamoto return err; 250b0ac0009STakashi Sakamoto } 251b0ac0009STakashi Sakamoto 252b0ac0009STakashi Sakamoto int snd_oxfw_stream_start_simplex(struct snd_oxfw *oxfw, 253b0ac0009STakashi Sakamoto struct amdtp_stream *stream, 254b0ac0009STakashi Sakamoto unsigned int rate, unsigned int pcm_channels) 255b0ac0009STakashi Sakamoto { 256b0ac0009STakashi Sakamoto struct amdtp_stream *opposite; 257f3699e2cSTakashi Sakamoto struct snd_oxfw_stream_formation formation; 258b0ac0009STakashi Sakamoto enum avc_general_plug_dir dir; 259b0ac0009STakashi Sakamoto unsigned int substreams, opposite_substreams; 260e2786ca6STakashi Sakamoto int err = 0; 261e2786ca6STakashi Sakamoto 262b0ac0009STakashi Sakamoto if (stream == &oxfw->tx_stream) { 263b0ac0009STakashi Sakamoto substreams = oxfw->capture_substreams; 264b0ac0009STakashi Sakamoto opposite = &oxfw->rx_stream; 265b0ac0009STakashi Sakamoto opposite_substreams = oxfw->playback_substreams; 266b0ac0009STakashi Sakamoto dir = AVC_GENERAL_PLUG_DIR_OUT; 267b0ac0009STakashi Sakamoto } else { 268b0ac0009STakashi Sakamoto substreams = oxfw->playback_substreams; 269b0ac0009STakashi Sakamoto opposite_substreams = oxfw->capture_substreams; 270e2786ca6STakashi Sakamoto 271b0ac0009STakashi Sakamoto if (oxfw->has_output) 272b0ac0009STakashi Sakamoto opposite = &oxfw->rx_stream; 273b0ac0009STakashi Sakamoto else 274b0ac0009STakashi Sakamoto opposite = NULL; 275b0ac0009STakashi Sakamoto 276b0ac0009STakashi Sakamoto dir = AVC_GENERAL_PLUG_DIR_IN; 277b0ac0009STakashi Sakamoto } 278b0ac0009STakashi Sakamoto 279b0ac0009STakashi Sakamoto if (substreams == 0) 280b0ac0009STakashi Sakamoto goto end; 281b0ac0009STakashi Sakamoto 282b0ac0009STakashi Sakamoto /* 283b0ac0009STakashi Sakamoto * Considering JACK/FFADO streaming: 284b0ac0009STakashi Sakamoto * TODO: This can be removed hwdep functionality becomes popular. 285b0ac0009STakashi Sakamoto */ 286b0ac0009STakashi Sakamoto err = check_connection_used_by_others(oxfw, stream); 287b0ac0009STakashi Sakamoto if (err < 0) 288b0ac0009STakashi Sakamoto goto end; 289b0ac0009STakashi Sakamoto 290b0ac0009STakashi Sakamoto /* packet queueing error */ 291b0ac0009STakashi Sakamoto if (amdtp_streaming_error(stream)) 292b0ac0009STakashi Sakamoto stop_stream(oxfw, stream); 293b0ac0009STakashi Sakamoto 294b0ac0009STakashi Sakamoto err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation); 295e2786ca6STakashi Sakamoto if (err < 0) 296e2786ca6STakashi Sakamoto goto end; 29705588d34STakashi Sakamoto if (rate == 0) 29805588d34STakashi Sakamoto rate = formation.rate; 29905588d34STakashi Sakamoto if (pcm_channels == 0) 30005588d34STakashi Sakamoto pcm_channels = formation.pcm; 301e2786ca6STakashi Sakamoto 302f3699e2cSTakashi Sakamoto if ((formation.rate != rate) || (formation.pcm != pcm_channels)) { 303b0ac0009STakashi Sakamoto if (opposite != NULL) { 304b0ac0009STakashi Sakamoto err = check_connection_used_by_others(oxfw, opposite); 305b0ac0009STakashi Sakamoto if (err < 0) 306b0ac0009STakashi Sakamoto goto end; 307b0ac0009STakashi Sakamoto stop_stream(oxfw, opposite); 308b0ac0009STakashi Sakamoto } 309b0ac0009STakashi Sakamoto stop_stream(oxfw, stream); 310f3699e2cSTakashi Sakamoto 311b0ac0009STakashi Sakamoto err = set_stream_format(oxfw, stream, rate, pcm_channels); 312f3699e2cSTakashi Sakamoto if (err < 0) { 313f3699e2cSTakashi Sakamoto dev_err(&oxfw->unit->device, 314f3699e2cSTakashi Sakamoto "fail to set stream format: %d\n", err); 315f3699e2cSTakashi Sakamoto goto end; 316f3699e2cSTakashi Sakamoto } 317b0ac0009STakashi Sakamoto 318b0ac0009STakashi Sakamoto /* Start opposite stream if needed. */ 319b0ac0009STakashi Sakamoto if (opposite && !amdtp_stream_running(opposite) && 320b0ac0009STakashi Sakamoto (opposite_substreams > 0)) { 321b0ac0009STakashi Sakamoto err = start_stream(oxfw, opposite, rate, 0); 322b0ac0009STakashi Sakamoto if (err < 0) { 323b0ac0009STakashi Sakamoto dev_err(&oxfw->unit->device, 324b0ac0009STakashi Sakamoto "fail to restart stream: %d\n", err); 325b0ac0009STakashi Sakamoto goto end; 326b0ac0009STakashi Sakamoto } 327b0ac0009STakashi Sakamoto } 328f3699e2cSTakashi Sakamoto } 329f3699e2cSTakashi Sakamoto 330b0ac0009STakashi Sakamoto /* Start requested stream. */ 331b0ac0009STakashi Sakamoto if (!amdtp_stream_running(stream)) { 332b0ac0009STakashi Sakamoto err = start_stream(oxfw, stream, rate, pcm_channels); 333f3699e2cSTakashi Sakamoto if (err < 0) 334f3699e2cSTakashi Sakamoto dev_err(&oxfw->unit->device, 335f3699e2cSTakashi Sakamoto "fail to start stream: %d\n", err); 336b0ac0009STakashi Sakamoto } 337e2786ca6STakashi Sakamoto end: 338e2786ca6STakashi Sakamoto return err; 339e2786ca6STakashi Sakamoto } 340e2786ca6STakashi Sakamoto 341b0ac0009STakashi Sakamoto void snd_oxfw_stream_stop_simplex(struct snd_oxfw *oxfw, 342b0ac0009STakashi Sakamoto struct amdtp_stream *stream) 343e2786ca6STakashi Sakamoto { 344b0ac0009STakashi Sakamoto if (((stream == &oxfw->tx_stream) && (oxfw->capture_substreams > 0)) || 345b0ac0009STakashi Sakamoto ((stream == &oxfw->rx_stream) && (oxfw->playback_substreams > 0))) 346b0ac0009STakashi Sakamoto return; 347b0ac0009STakashi Sakamoto 348b0ac0009STakashi Sakamoto stop_stream(oxfw, stream); 349e2786ca6STakashi Sakamoto } 350e2786ca6STakashi Sakamoto 351d23c2cc4STakashi Sakamoto /* 352d23c2cc4STakashi Sakamoto * This function should be called before starting the stream or after stopping 353d23c2cc4STakashi Sakamoto * the streams. 354d23c2cc4STakashi Sakamoto */ 355b0ac0009STakashi Sakamoto void snd_oxfw_stream_destroy_simplex(struct snd_oxfw *oxfw, 356b0ac0009STakashi Sakamoto struct amdtp_stream *stream) 357e2786ca6STakashi Sakamoto { 358b0ac0009STakashi Sakamoto struct cmp_connection *conn; 359e2786ca6STakashi Sakamoto 360b0ac0009STakashi Sakamoto if (stream == &oxfw->tx_stream) 361b0ac0009STakashi Sakamoto conn = &oxfw->out_conn; 362e2786ca6STakashi Sakamoto else 363b0ac0009STakashi Sakamoto conn = &oxfw->in_conn; 364b0ac0009STakashi Sakamoto 365b0ac0009STakashi Sakamoto amdtp_stream_destroy(stream); 366b0ac0009STakashi Sakamoto cmp_connection_destroy(conn); 367b0ac0009STakashi Sakamoto } 368b0ac0009STakashi Sakamoto 369b0ac0009STakashi Sakamoto void snd_oxfw_stream_update_simplex(struct snd_oxfw *oxfw, 370b0ac0009STakashi Sakamoto struct amdtp_stream *stream) 371b0ac0009STakashi Sakamoto { 372b0ac0009STakashi Sakamoto struct cmp_connection *conn; 373b0ac0009STakashi Sakamoto 374b0ac0009STakashi Sakamoto if (stream == &oxfw->tx_stream) 375b0ac0009STakashi Sakamoto conn = &oxfw->out_conn; 376b0ac0009STakashi Sakamoto else 377b0ac0009STakashi Sakamoto conn = &oxfw->in_conn; 378b0ac0009STakashi Sakamoto 379b0ac0009STakashi Sakamoto if (cmp_connection_update(conn) < 0) 380b0ac0009STakashi Sakamoto stop_stream(oxfw, stream); 381b0ac0009STakashi Sakamoto else 382b0ac0009STakashi Sakamoto amdtp_stream_update(stream); 383e2786ca6STakashi Sakamoto } 3845cd1d3f4STakashi Sakamoto 3853c96101fSTakashi Sakamoto int snd_oxfw_stream_get_current_formation(struct snd_oxfw *oxfw, 3863c96101fSTakashi Sakamoto enum avc_general_plug_dir dir, 3873c96101fSTakashi Sakamoto struct snd_oxfw_stream_formation *formation) 3883c96101fSTakashi Sakamoto { 3893c96101fSTakashi Sakamoto u8 *format; 3903c96101fSTakashi Sakamoto unsigned int len; 3913c96101fSTakashi Sakamoto int err; 3923c96101fSTakashi Sakamoto 3933c96101fSTakashi Sakamoto len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 3943c96101fSTakashi Sakamoto format = kmalloc(len, GFP_KERNEL); 3953c96101fSTakashi Sakamoto if (format == NULL) 3963c96101fSTakashi Sakamoto return -ENOMEM; 3973c96101fSTakashi Sakamoto 3983c96101fSTakashi Sakamoto err = avc_stream_get_format_single(oxfw->unit, dir, 0, format, &len); 3993c96101fSTakashi Sakamoto if (err < 0) 4003c96101fSTakashi Sakamoto goto end; 4013c96101fSTakashi Sakamoto if (len < 3) { 4023c96101fSTakashi Sakamoto err = -EIO; 4033c96101fSTakashi Sakamoto goto end; 4043c96101fSTakashi Sakamoto } 4053c96101fSTakashi Sakamoto 4063c96101fSTakashi Sakamoto err = snd_oxfw_stream_parse_format(format, formation); 4073c96101fSTakashi Sakamoto end: 4083c96101fSTakashi Sakamoto kfree(format); 4093c96101fSTakashi Sakamoto return err; 4103c96101fSTakashi Sakamoto } 4113c96101fSTakashi Sakamoto 4125cd1d3f4STakashi Sakamoto /* 4135cd1d3f4STakashi Sakamoto * See Table 6.16 - AM824 Stream Format 4145cd1d3f4STakashi Sakamoto * Figure 6.19 - format_information field for AM824 Compound 4155cd1d3f4STakashi Sakamoto * in AV/C Stream Format Information Specification 1.1 (Apr 2005, 1394TA) 4165cd1d3f4STakashi Sakamoto * Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005 4175cd1d3f4STakashi Sakamoto */ 4185cd1d3f4STakashi Sakamoto int snd_oxfw_stream_parse_format(u8 *format, 4195cd1d3f4STakashi Sakamoto struct snd_oxfw_stream_formation *formation) 4205cd1d3f4STakashi Sakamoto { 4215cd1d3f4STakashi Sakamoto unsigned int i, e, channels, type; 4225cd1d3f4STakashi Sakamoto 4235cd1d3f4STakashi Sakamoto memset(formation, 0, sizeof(struct snd_oxfw_stream_formation)); 4245cd1d3f4STakashi Sakamoto 4255cd1d3f4STakashi Sakamoto /* 4265cd1d3f4STakashi Sakamoto * this module can support a hierarchy combination that: 4275cd1d3f4STakashi Sakamoto * Root: Audio and Music (0x90) 4285cd1d3f4STakashi Sakamoto * Level 1: AM824 Compound (0x40) 4295cd1d3f4STakashi Sakamoto */ 4305cd1d3f4STakashi Sakamoto if ((format[0] != 0x90) || (format[1] != 0x40)) 4315cd1d3f4STakashi Sakamoto return -ENOSYS; 4325cd1d3f4STakashi Sakamoto 4335cd1d3f4STakashi Sakamoto /* check the sampling rate */ 4345cd1d3f4STakashi Sakamoto for (i = 0; i < ARRAY_SIZE(avc_stream_rate_table); i++) { 4355cd1d3f4STakashi Sakamoto if (format[2] == avc_stream_rate_table[i]) 4365cd1d3f4STakashi Sakamoto break; 4375cd1d3f4STakashi Sakamoto } 4385cd1d3f4STakashi Sakamoto if (i == ARRAY_SIZE(avc_stream_rate_table)) 4395cd1d3f4STakashi Sakamoto return -ENOSYS; 4405cd1d3f4STakashi Sakamoto 4415cd1d3f4STakashi Sakamoto formation->rate = oxfw_rate_table[i]; 4425cd1d3f4STakashi Sakamoto 4435cd1d3f4STakashi Sakamoto for (e = 0; e < format[4]; e++) { 4445cd1d3f4STakashi Sakamoto channels = format[5 + e * 2]; 4455cd1d3f4STakashi Sakamoto type = format[6 + e * 2]; 4465cd1d3f4STakashi Sakamoto 4475cd1d3f4STakashi Sakamoto switch (type) { 4485cd1d3f4STakashi Sakamoto /* IEC 60958 Conformant, currently handled as MBLA */ 4495cd1d3f4STakashi Sakamoto case 0x00: 4505cd1d3f4STakashi Sakamoto /* Multi Bit Linear Audio (Raw) */ 4515cd1d3f4STakashi Sakamoto case 0x06: 4525cd1d3f4STakashi Sakamoto formation->pcm += channels; 4535cd1d3f4STakashi Sakamoto break; 4545cd1d3f4STakashi Sakamoto /* MIDI Conformant */ 4555cd1d3f4STakashi Sakamoto case 0x0d: 4565cd1d3f4STakashi Sakamoto formation->midi = channels; 4575cd1d3f4STakashi Sakamoto break; 4585cd1d3f4STakashi Sakamoto /* IEC 61937-3 to 7 */ 4595cd1d3f4STakashi Sakamoto case 0x01: 4605cd1d3f4STakashi Sakamoto case 0x02: 4615cd1d3f4STakashi Sakamoto case 0x03: 4625cd1d3f4STakashi Sakamoto case 0x04: 4635cd1d3f4STakashi Sakamoto case 0x05: 4645cd1d3f4STakashi Sakamoto /* Multi Bit Linear Audio */ 4655cd1d3f4STakashi Sakamoto case 0x07: /* DVD-Audio */ 4665cd1d3f4STakashi Sakamoto case 0x0c: /* High Precision */ 4675cd1d3f4STakashi Sakamoto /* One Bit Audio */ 4685cd1d3f4STakashi Sakamoto case 0x08: /* (Plain) Raw */ 4695cd1d3f4STakashi Sakamoto case 0x09: /* (Plain) SACD */ 4705cd1d3f4STakashi Sakamoto case 0x0a: /* (Encoded) Raw */ 4715cd1d3f4STakashi Sakamoto case 0x0b: /* (Encoded) SACD */ 4725cd1d3f4STakashi Sakamoto /* SMPTE Time-Code conformant */ 4735cd1d3f4STakashi Sakamoto case 0x0e: 4745cd1d3f4STakashi Sakamoto /* Sample Count */ 4755cd1d3f4STakashi Sakamoto case 0x0f: 4765cd1d3f4STakashi Sakamoto /* Anciliary Data */ 4775cd1d3f4STakashi Sakamoto case 0x10: 4785cd1d3f4STakashi Sakamoto /* Synchronization Stream (Stereo Raw audio) */ 4795cd1d3f4STakashi Sakamoto case 0x40: 4805cd1d3f4STakashi Sakamoto /* Don't care */ 4815cd1d3f4STakashi Sakamoto case 0xff: 4825cd1d3f4STakashi Sakamoto default: 4835cd1d3f4STakashi Sakamoto return -ENOSYS; /* not supported */ 4845cd1d3f4STakashi Sakamoto } 4855cd1d3f4STakashi Sakamoto } 4865cd1d3f4STakashi Sakamoto 48749c7b3fcSTakashi Sakamoto if (formation->pcm > AM824_MAX_CHANNELS_FOR_PCM || 48849c7b3fcSTakashi Sakamoto formation->midi > AM824_MAX_CHANNELS_FOR_MIDI) 4895cd1d3f4STakashi Sakamoto return -ENOSYS; 4905cd1d3f4STakashi Sakamoto 4915cd1d3f4STakashi Sakamoto return 0; 4925cd1d3f4STakashi Sakamoto } 4935cd1d3f4STakashi Sakamoto 4945cd1d3f4STakashi Sakamoto static int 4955cd1d3f4STakashi Sakamoto assume_stream_formats(struct snd_oxfw *oxfw, enum avc_general_plug_dir dir, 4965cd1d3f4STakashi Sakamoto unsigned int pid, u8 *buf, unsigned int *len, 4975cd1d3f4STakashi Sakamoto u8 **formats) 4985cd1d3f4STakashi Sakamoto { 4995cd1d3f4STakashi Sakamoto struct snd_oxfw_stream_formation formation; 5005cd1d3f4STakashi Sakamoto unsigned int i, eid; 5015cd1d3f4STakashi Sakamoto int err; 5025cd1d3f4STakashi Sakamoto 5035cd1d3f4STakashi Sakamoto /* get format at current sampling rate */ 5045cd1d3f4STakashi Sakamoto err = avc_stream_get_format_single(oxfw->unit, dir, pid, buf, len); 5055cd1d3f4STakashi Sakamoto if (err < 0) { 5065cd1d3f4STakashi Sakamoto dev_err(&oxfw->unit->device, 5075cd1d3f4STakashi Sakamoto "fail to get current stream format for isoc %s plug %d:%d\n", 5085cd1d3f4STakashi Sakamoto (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : "out", 5095cd1d3f4STakashi Sakamoto pid, err); 5105cd1d3f4STakashi Sakamoto goto end; 5115cd1d3f4STakashi Sakamoto } 5125cd1d3f4STakashi Sakamoto 5135cd1d3f4STakashi Sakamoto /* parse and set stream format */ 5145cd1d3f4STakashi Sakamoto eid = 0; 5155cd1d3f4STakashi Sakamoto err = snd_oxfw_stream_parse_format(buf, &formation); 5165cd1d3f4STakashi Sakamoto if (err < 0) 5175cd1d3f4STakashi Sakamoto goto end; 5185cd1d3f4STakashi Sakamoto 519cd3b7116STakashi Sakamoto formats[eid] = devm_kmemdup(&oxfw->card->card_dev, buf, *len, 520cd3b7116STakashi Sakamoto GFP_KERNEL); 521cd3b7116STakashi Sakamoto if (!formats[eid]) { 5225cd1d3f4STakashi Sakamoto err = -ENOMEM; 5235cd1d3f4STakashi Sakamoto goto end; 5245cd1d3f4STakashi Sakamoto } 5255cd1d3f4STakashi Sakamoto 5265cd1d3f4STakashi Sakamoto /* apply the format for each available sampling rate */ 5275cd1d3f4STakashi Sakamoto for (i = 0; i < ARRAY_SIZE(oxfw_rate_table); i++) { 5285cd1d3f4STakashi Sakamoto if (formation.rate == oxfw_rate_table[i]) 5295cd1d3f4STakashi Sakamoto continue; 5305cd1d3f4STakashi Sakamoto 5315cd1d3f4STakashi Sakamoto err = avc_general_inquiry_sig_fmt(oxfw->unit, 5325cd1d3f4STakashi Sakamoto oxfw_rate_table[i], 5335cd1d3f4STakashi Sakamoto dir, pid); 5345cd1d3f4STakashi Sakamoto if (err < 0) 5355cd1d3f4STakashi Sakamoto continue; 5365cd1d3f4STakashi Sakamoto 5375cd1d3f4STakashi Sakamoto eid++; 538cd3b7116STakashi Sakamoto formats[eid] = devm_kmemdup(&oxfw->card->card_dev, buf, *len, 539cd3b7116STakashi Sakamoto GFP_KERNEL); 5405cd1d3f4STakashi Sakamoto if (formats[eid] == NULL) { 5415cd1d3f4STakashi Sakamoto err = -ENOMEM; 5425cd1d3f4STakashi Sakamoto goto end; 5435cd1d3f4STakashi Sakamoto } 5445cd1d3f4STakashi Sakamoto formats[eid][2] = avc_stream_rate_table[i]; 5455cd1d3f4STakashi Sakamoto } 5465cd1d3f4STakashi Sakamoto 5475cd1d3f4STakashi Sakamoto err = 0; 5485cd1d3f4STakashi Sakamoto oxfw->assumed = true; 5495cd1d3f4STakashi Sakamoto end: 5505cd1d3f4STakashi Sakamoto return err; 5515cd1d3f4STakashi Sakamoto } 5525cd1d3f4STakashi Sakamoto 5535cd1d3f4STakashi Sakamoto static int fill_stream_formats(struct snd_oxfw *oxfw, 5545cd1d3f4STakashi Sakamoto enum avc_general_plug_dir dir, 5555cd1d3f4STakashi Sakamoto unsigned short pid) 5565cd1d3f4STakashi Sakamoto { 5575cd1d3f4STakashi Sakamoto u8 *buf, **formats; 5585cd1d3f4STakashi Sakamoto unsigned int len, eid = 0; 5595cd1d3f4STakashi Sakamoto struct snd_oxfw_stream_formation dummy; 5605cd1d3f4STakashi Sakamoto int err; 5615cd1d3f4STakashi Sakamoto 5625cd1d3f4STakashi Sakamoto buf = kmalloc(AVC_GENERIC_FRAME_MAXIMUM_BYTES, GFP_KERNEL); 5635cd1d3f4STakashi Sakamoto if (buf == NULL) 5645cd1d3f4STakashi Sakamoto return -ENOMEM; 5655cd1d3f4STakashi Sakamoto 566b0ac0009STakashi Sakamoto if (dir == AVC_GENERAL_PLUG_DIR_OUT) 567b0ac0009STakashi Sakamoto formats = oxfw->tx_stream_formats; 568b0ac0009STakashi Sakamoto else 5695cd1d3f4STakashi Sakamoto formats = oxfw->rx_stream_formats; 5705cd1d3f4STakashi Sakamoto 5715cd1d3f4STakashi Sakamoto /* get first entry */ 5725cd1d3f4STakashi Sakamoto len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 5735cd1d3f4STakashi Sakamoto err = avc_stream_get_format_list(oxfw->unit, dir, 0, buf, &len, 0); 5745cd1d3f4STakashi Sakamoto if (err == -ENOSYS) { 5755cd1d3f4STakashi Sakamoto /* LIST subfunction is not implemented */ 5765cd1d3f4STakashi Sakamoto len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 5775cd1d3f4STakashi Sakamoto err = assume_stream_formats(oxfw, dir, pid, buf, &len, 5785cd1d3f4STakashi Sakamoto formats); 5795cd1d3f4STakashi Sakamoto goto end; 5805cd1d3f4STakashi Sakamoto } else if (err < 0) { 5815cd1d3f4STakashi Sakamoto dev_err(&oxfw->unit->device, 5825cd1d3f4STakashi Sakamoto "fail to get stream format %d for isoc %s plug %d:%d\n", 5835cd1d3f4STakashi Sakamoto eid, (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : "out", 5845cd1d3f4STakashi Sakamoto pid, err); 5855cd1d3f4STakashi Sakamoto goto end; 5865cd1d3f4STakashi Sakamoto } 5875cd1d3f4STakashi Sakamoto 5885cd1d3f4STakashi Sakamoto /* LIST subfunction is implemented */ 5895cd1d3f4STakashi Sakamoto while (eid < SND_OXFW_STREAM_FORMAT_ENTRIES) { 5905cd1d3f4STakashi Sakamoto /* The format is too short. */ 5915cd1d3f4STakashi Sakamoto if (len < 3) { 5925cd1d3f4STakashi Sakamoto err = -EIO; 5935cd1d3f4STakashi Sakamoto break; 5945cd1d3f4STakashi Sakamoto } 5955cd1d3f4STakashi Sakamoto 5965cd1d3f4STakashi Sakamoto /* parse and set stream format */ 5975cd1d3f4STakashi Sakamoto err = snd_oxfw_stream_parse_format(buf, &dummy); 5985cd1d3f4STakashi Sakamoto if (err < 0) 5995cd1d3f4STakashi Sakamoto break; 6005cd1d3f4STakashi Sakamoto 601cd3b7116STakashi Sakamoto formats[eid] = devm_kmemdup(&oxfw->card->card_dev, buf, len, 602cd3b7116STakashi Sakamoto GFP_KERNEL); 603cd3b7116STakashi Sakamoto if (!formats[eid]) { 6045cd1d3f4STakashi Sakamoto err = -ENOMEM; 6055cd1d3f4STakashi Sakamoto break; 6065cd1d3f4STakashi Sakamoto } 6075cd1d3f4STakashi Sakamoto 6085cd1d3f4STakashi Sakamoto /* get next entry */ 6095cd1d3f4STakashi Sakamoto len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 6105cd1d3f4STakashi Sakamoto err = avc_stream_get_format_list(oxfw->unit, dir, 0, 6115cd1d3f4STakashi Sakamoto buf, &len, ++eid); 6125cd1d3f4STakashi Sakamoto /* No entries remained. */ 6135cd1d3f4STakashi Sakamoto if (err == -EINVAL) { 6145cd1d3f4STakashi Sakamoto err = 0; 6155cd1d3f4STakashi Sakamoto break; 6165cd1d3f4STakashi Sakamoto } else if (err < 0) { 6175cd1d3f4STakashi Sakamoto dev_err(&oxfw->unit->device, 6185cd1d3f4STakashi Sakamoto "fail to get stream format %d for isoc %s plug %d:%d\n", 6195cd1d3f4STakashi Sakamoto eid, (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : 6205cd1d3f4STakashi Sakamoto "out", 6215cd1d3f4STakashi Sakamoto pid, err); 6225cd1d3f4STakashi Sakamoto break; 6235cd1d3f4STakashi Sakamoto } 6245cd1d3f4STakashi Sakamoto } 6255cd1d3f4STakashi Sakamoto end: 6265cd1d3f4STakashi Sakamoto kfree(buf); 6275cd1d3f4STakashi Sakamoto return err; 6285cd1d3f4STakashi Sakamoto } 6295cd1d3f4STakashi Sakamoto 6305cd1d3f4STakashi Sakamoto int snd_oxfw_stream_discover(struct snd_oxfw *oxfw) 6315cd1d3f4STakashi Sakamoto { 6325cd1d3f4STakashi Sakamoto u8 plugs[AVC_PLUG_INFO_BUF_BYTES]; 63332056041STakashi Sakamoto struct snd_oxfw_stream_formation formation; 63432056041STakashi Sakamoto u8 *format; 63532056041STakashi Sakamoto unsigned int i; 6365cd1d3f4STakashi Sakamoto int err; 6375cd1d3f4STakashi Sakamoto 6385cd1d3f4STakashi Sakamoto /* the number of plugs for isoc in/out, ext in/out */ 6395cd1d3f4STakashi Sakamoto err = avc_general_get_plug_info(oxfw->unit, 0x1f, 0x07, 0x00, plugs); 6405cd1d3f4STakashi Sakamoto if (err < 0) { 6415cd1d3f4STakashi Sakamoto dev_err(&oxfw->unit->device, 6425cd1d3f4STakashi Sakamoto "fail to get info for isoc/external in/out plugs: %d\n", 6435cd1d3f4STakashi Sakamoto err); 6445cd1d3f4STakashi Sakamoto goto end; 645b0ac0009STakashi Sakamoto } else if ((plugs[0] == 0) && (plugs[1] == 0)) { 6465cd1d3f4STakashi Sakamoto err = -ENOSYS; 6475cd1d3f4STakashi Sakamoto goto end; 6485cd1d3f4STakashi Sakamoto } 6495cd1d3f4STakashi Sakamoto 650b0ac0009STakashi Sakamoto /* use oPCR[0] if exists */ 651b0ac0009STakashi Sakamoto if (plugs[1] > 0) { 652b0ac0009STakashi Sakamoto err = fill_stream_formats(oxfw, AVC_GENERAL_PLUG_DIR_OUT, 0); 653b0ac0009STakashi Sakamoto if (err < 0) 654b0ac0009STakashi Sakamoto goto end; 65532056041STakashi Sakamoto 65632056041STakashi Sakamoto for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 65732056041STakashi Sakamoto format = oxfw->tx_stream_formats[i]; 65832056041STakashi Sakamoto if (format == NULL) 65932056041STakashi Sakamoto continue; 66032056041STakashi Sakamoto err = snd_oxfw_stream_parse_format(format, &formation); 66132056041STakashi Sakamoto if (err < 0) 66232056041STakashi Sakamoto continue; 66332056041STakashi Sakamoto 66432056041STakashi Sakamoto /* Add one MIDI port. */ 66532056041STakashi Sakamoto if (formation.midi > 0) 66632056041STakashi Sakamoto oxfw->midi_input_ports = 1; 66732056041STakashi Sakamoto } 66832056041STakashi Sakamoto 669b0ac0009STakashi Sakamoto oxfw->has_output = true; 670b0ac0009STakashi Sakamoto } 671b0ac0009STakashi Sakamoto 6725cd1d3f4STakashi Sakamoto /* use iPCR[0] if exists */ 67332056041STakashi Sakamoto if (plugs[0] > 0) { 6745cd1d3f4STakashi Sakamoto err = fill_stream_formats(oxfw, AVC_GENERAL_PLUG_DIR_IN, 0); 67532056041STakashi Sakamoto if (err < 0) 67632056041STakashi Sakamoto goto end; 67732056041STakashi Sakamoto 67832056041STakashi Sakamoto for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 67932056041STakashi Sakamoto format = oxfw->rx_stream_formats[i]; 68032056041STakashi Sakamoto if (format == NULL) 68132056041STakashi Sakamoto continue; 68232056041STakashi Sakamoto err = snd_oxfw_stream_parse_format(format, &formation); 68332056041STakashi Sakamoto if (err < 0) 68432056041STakashi Sakamoto continue; 68532056041STakashi Sakamoto 68632056041STakashi Sakamoto /* Add one MIDI port. */ 68732056041STakashi Sakamoto if (formation.midi > 0) 68832056041STakashi Sakamoto oxfw->midi_output_ports = 1; 68932056041STakashi Sakamoto } 69032056041STakashi Sakamoto } 6915cd1d3f4STakashi Sakamoto end: 6925cd1d3f4STakashi Sakamoto return err; 6935cd1d3f4STakashi Sakamoto } 6948985f4acSTakashi Sakamoto 6958985f4acSTakashi Sakamoto void snd_oxfw_stream_lock_changed(struct snd_oxfw *oxfw) 6968985f4acSTakashi Sakamoto { 6978985f4acSTakashi Sakamoto oxfw->dev_lock_changed = true; 6988985f4acSTakashi Sakamoto wake_up(&oxfw->hwdep_wait); 6998985f4acSTakashi Sakamoto } 7008985f4acSTakashi Sakamoto 7018985f4acSTakashi Sakamoto int snd_oxfw_stream_lock_try(struct snd_oxfw *oxfw) 7028985f4acSTakashi Sakamoto { 7038985f4acSTakashi Sakamoto int err; 7048985f4acSTakashi Sakamoto 7058985f4acSTakashi Sakamoto spin_lock_irq(&oxfw->lock); 7068985f4acSTakashi Sakamoto 7078985f4acSTakashi Sakamoto /* user land lock this */ 7088985f4acSTakashi Sakamoto if (oxfw->dev_lock_count < 0) { 7098985f4acSTakashi Sakamoto err = -EBUSY; 7108985f4acSTakashi Sakamoto goto end; 7118985f4acSTakashi Sakamoto } 7128985f4acSTakashi Sakamoto 7138985f4acSTakashi Sakamoto /* this is the first time */ 7148985f4acSTakashi Sakamoto if (oxfw->dev_lock_count++ == 0) 7158985f4acSTakashi Sakamoto snd_oxfw_stream_lock_changed(oxfw); 7168985f4acSTakashi Sakamoto err = 0; 7178985f4acSTakashi Sakamoto end: 7188985f4acSTakashi Sakamoto spin_unlock_irq(&oxfw->lock); 7198985f4acSTakashi Sakamoto return err; 7208985f4acSTakashi Sakamoto } 7218985f4acSTakashi Sakamoto 7228985f4acSTakashi Sakamoto void snd_oxfw_stream_lock_release(struct snd_oxfw *oxfw) 7238985f4acSTakashi Sakamoto { 7248985f4acSTakashi Sakamoto spin_lock_irq(&oxfw->lock); 7258985f4acSTakashi Sakamoto 7268985f4acSTakashi Sakamoto if (WARN_ON(oxfw->dev_lock_count <= 0)) 7278985f4acSTakashi Sakamoto goto end; 7288985f4acSTakashi Sakamoto if (--oxfw->dev_lock_count == 0) 7298985f4acSTakashi Sakamoto snd_oxfw_stream_lock_changed(oxfw); 7308985f4acSTakashi Sakamoto end: 7318985f4acSTakashi Sakamoto spin_unlock_irq(&oxfw->lock); 7328985f4acSTakashi Sakamoto } 733