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 104521b2e11STakashi Sakamoto static int start_stream(struct snd_oxfw *oxfw, struct amdtp_stream *stream) 105e2786ca6STakashi Sakamoto { 106f3699e2cSTakashi Sakamoto u8 **formats; 107521b2e11STakashi Sakamoto enum avc_general_plug_dir dir; 108f3699e2cSTakashi Sakamoto struct cmp_connection *conn; 109f3699e2cSTakashi Sakamoto struct snd_oxfw_stream_formation formation; 110521b2e11STakashi Sakamoto int i; 111f3699e2cSTakashi Sakamoto int err; 112f3699e2cSTakashi Sakamoto 113b0ac0009STakashi Sakamoto if (stream == &oxfw->rx_stream) { 114521b2e11STakashi Sakamoto dir = AVC_GENERAL_PLUG_DIR_IN; 115f3699e2cSTakashi Sakamoto formats = oxfw->rx_stream_formats; 116f3699e2cSTakashi Sakamoto conn = &oxfw->in_conn; 117b0ac0009STakashi Sakamoto } else { 118521b2e11STakashi Sakamoto dir = AVC_GENERAL_PLUG_DIR_OUT; 119b0ac0009STakashi Sakamoto formats = oxfw->tx_stream_formats; 120b0ac0009STakashi Sakamoto conn = &oxfw->out_conn; 121b0ac0009STakashi Sakamoto } 122f3699e2cSTakashi Sakamoto 123521b2e11STakashi Sakamoto err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation); 124521b2e11STakashi Sakamoto if (err < 0) 125521b2e11STakashi Sakamoto return err; 126521b2e11STakashi Sakamoto 127f3699e2cSTakashi Sakamoto for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 128521b2e11STakashi Sakamoto struct snd_oxfw_stream_formation fmt; 129521b2e11STakashi Sakamoto 130f3699e2cSTakashi Sakamoto if (formats[i] == NULL) 131f3699e2cSTakashi Sakamoto break; 132f3699e2cSTakashi Sakamoto 133521b2e11STakashi Sakamoto err = snd_oxfw_stream_parse_format(formats[i], &fmt); 134f3699e2cSTakashi Sakamoto if (err < 0) 135521b2e11STakashi Sakamoto return err; 136521b2e11STakashi Sakamoto if (fmt.rate == formation.rate && fmt.pcm == formation.pcm && 137521b2e11STakashi Sakamoto fmt.midi == formation.midi) 138f3699e2cSTakashi Sakamoto break; 139f3699e2cSTakashi Sakamoto } 140521b2e11STakashi Sakamoto if (i == SND_OXFW_STREAM_FORMAT_ENTRIES) 141521b2e11STakashi Sakamoto return -EINVAL; 142f3699e2cSTakashi Sakamoto 143521b2e11STakashi Sakamoto // The stream should have one pcm channels at least. 144521b2e11STakashi Sakamoto if (formation.pcm == 0) 145521b2e11STakashi Sakamoto return -EINVAL; 146f3699e2cSTakashi Sakamoto 147521b2e11STakashi Sakamoto err = amdtp_am824_set_parameters(stream, formation.rate, formation.pcm, 148521b2e11STakashi Sakamoto formation.midi * 8, false); 149547e631cSTakashi Sakamoto if (err < 0) 150e34244ddSTakashi Sakamoto return err; 151f3699e2cSTakashi Sakamoto 152f3699e2cSTakashi Sakamoto err = cmp_connection_establish(conn, 153f3699e2cSTakashi Sakamoto amdtp_stream_get_max_payload(stream)); 154f3699e2cSTakashi Sakamoto if (err < 0) 155e34244ddSTakashi Sakamoto return err; 156f3699e2cSTakashi Sakamoto 157e34244ddSTakashi Sakamoto err = amdtp_stream_start(stream, conn->resources.channel, conn->speed); 158f3699e2cSTakashi Sakamoto if (err < 0) { 159f3699e2cSTakashi Sakamoto cmp_connection_break(conn); 160e34244ddSTakashi Sakamoto return err; 161f3699e2cSTakashi Sakamoto } 162f3699e2cSTakashi Sakamoto 163e34244ddSTakashi Sakamoto // Wait first packet. 164f2b14c0bSTakashi Sakamoto if (!amdtp_stream_wait_callback(stream, CALLBACK_TIMEOUT)) { 165e34244ddSTakashi Sakamoto amdtp_stream_stop(stream); 166e34244ddSTakashi Sakamoto cmp_connection_break(conn); 167e34244ddSTakashi Sakamoto return -ETIMEDOUT; 168f2b14c0bSTakashi Sakamoto } 169e34244ddSTakashi Sakamoto 170e34244ddSTakashi Sakamoto return 0; 171f3699e2cSTakashi Sakamoto } 172f3699e2cSTakashi Sakamoto 173b0ac0009STakashi Sakamoto static int check_connection_used_by_others(struct snd_oxfw *oxfw, 174b0ac0009STakashi Sakamoto struct amdtp_stream *stream) 175f3699e2cSTakashi Sakamoto { 176b0ac0009STakashi Sakamoto struct cmp_connection *conn; 177b0ac0009STakashi Sakamoto bool used; 178b0ac0009STakashi Sakamoto int err; 179b0ac0009STakashi Sakamoto 180b0ac0009STakashi Sakamoto if (stream == &oxfw->tx_stream) 181b0ac0009STakashi Sakamoto conn = &oxfw->out_conn; 182b0ac0009STakashi Sakamoto else 183b0ac0009STakashi Sakamoto conn = &oxfw->in_conn; 184b0ac0009STakashi Sakamoto 185b0ac0009STakashi Sakamoto err = cmp_connection_check_used(conn, &used); 186b0ac0009STakashi Sakamoto if ((err >= 0) && used && !amdtp_stream_running(stream)) { 187b0ac0009STakashi Sakamoto dev_err(&oxfw->unit->device, 188b0ac0009STakashi Sakamoto "Connection established by others: %cPCR[%d]\n", 189b0ac0009STakashi Sakamoto (conn->direction == CMP_OUTPUT) ? 'o' : 'i', 190b0ac0009STakashi Sakamoto conn->pcr_index); 191b0ac0009STakashi Sakamoto err = -EBUSY; 192b0ac0009STakashi Sakamoto } 193b0ac0009STakashi Sakamoto 194b0ac0009STakashi Sakamoto return err; 195b0ac0009STakashi Sakamoto } 196b0ac0009STakashi Sakamoto 197b0ac0009STakashi Sakamoto int snd_oxfw_stream_init_simplex(struct snd_oxfw *oxfw, 198b0ac0009STakashi Sakamoto struct amdtp_stream *stream) 199b0ac0009STakashi Sakamoto { 200b0ac0009STakashi Sakamoto struct cmp_connection *conn; 201b0ac0009STakashi Sakamoto enum cmp_direction c_dir; 202b0ac0009STakashi Sakamoto enum amdtp_stream_direction s_dir; 203b0ac0009STakashi Sakamoto int err; 204b0ac0009STakashi Sakamoto 205b0ac0009STakashi Sakamoto if (stream == &oxfw->tx_stream) { 206b0ac0009STakashi Sakamoto conn = &oxfw->out_conn; 207b0ac0009STakashi Sakamoto c_dir = CMP_OUTPUT; 208b0ac0009STakashi Sakamoto s_dir = AMDTP_IN_STREAM; 209b0ac0009STakashi Sakamoto } else { 210b0ac0009STakashi Sakamoto conn = &oxfw->in_conn; 211b0ac0009STakashi Sakamoto c_dir = CMP_INPUT; 212b0ac0009STakashi Sakamoto s_dir = AMDTP_OUT_STREAM; 213b0ac0009STakashi Sakamoto } 214b0ac0009STakashi Sakamoto 215b0ac0009STakashi Sakamoto err = cmp_connection_init(conn, oxfw->unit, c_dir, 0); 216b0ac0009STakashi Sakamoto if (err < 0) 217b0ac0009STakashi Sakamoto goto end; 218b0ac0009STakashi Sakamoto 2195955815eSTakashi Sakamoto err = amdtp_am824_init(stream, oxfw->unit, s_dir, CIP_NONBLOCKING); 220b0ac0009STakashi Sakamoto if (err < 0) { 221b0ac0009STakashi Sakamoto amdtp_stream_destroy(stream); 222b0ac0009STakashi Sakamoto cmp_connection_destroy(conn); 223b0ac0009STakashi Sakamoto goto end; 224b0ac0009STakashi Sakamoto } 225b0ac0009STakashi Sakamoto 226a2064710STakashi Sakamoto /* 227a2064710STakashi Sakamoto * OXFW starts to transmit packets with non-zero dbc. 228a2064710STakashi Sakamoto * OXFW postpone transferring packets till handling any asynchronous 229a2064710STakashi Sakamoto * packets. As a result, next isochronous packet includes more data 230a2064710STakashi Sakamoto * blocks than IEC 61883-6 defines. 231a2064710STakashi Sakamoto */ 23213f3a46dSTakashi Sakamoto if (stream == &oxfw->tx_stream) { 23362f00e40STakashi Sakamoto oxfw->tx_stream.flags |= CIP_JUMBO_PAYLOAD; 23413f3a46dSTakashi Sakamoto if (oxfw->wrong_dbs) 23513f3a46dSTakashi Sakamoto oxfw->tx_stream.flags |= CIP_WRONG_DBS; 23613f3a46dSTakashi Sakamoto } 237b0ac0009STakashi Sakamoto end: 238b0ac0009STakashi Sakamoto return err; 239b0ac0009STakashi Sakamoto } 240b0ac0009STakashi Sakamoto 241b0ac0009STakashi Sakamoto int snd_oxfw_stream_start_simplex(struct snd_oxfw *oxfw, 242b0ac0009STakashi Sakamoto struct amdtp_stream *stream, 243b0ac0009STakashi Sakamoto unsigned int rate, unsigned int pcm_channels) 244b0ac0009STakashi Sakamoto { 245f3699e2cSTakashi Sakamoto struct snd_oxfw_stream_formation formation; 246b0ac0009STakashi Sakamoto enum avc_general_plug_dir dir; 247e2786ca6STakashi Sakamoto int err = 0; 248e2786ca6STakashi Sakamoto 24920358d44STakashi Sakamoto if (oxfw->capture_substreams == 0 && oxfw->playback_substreams == 0) 25020358d44STakashi Sakamoto return -EIO; 251e2786ca6STakashi Sakamoto 25220358d44STakashi Sakamoto // Considering JACK/FFADO streaming: 25320358d44STakashi Sakamoto // TODO: This can be removed hwdep functionality becomes popular. 25420358d44STakashi Sakamoto err = check_connection_used_by_others(oxfw, &oxfw->rx_stream); 25520358d44STakashi Sakamoto if (err < 0) 25620358d44STakashi Sakamoto return err; 25720358d44STakashi Sakamoto if (oxfw->has_output) { 25820358d44STakashi Sakamoto err = check_connection_used_by_others(oxfw, &oxfw->tx_stream); 25920358d44STakashi Sakamoto if (err < 0) 26020358d44STakashi Sakamoto return err; 261b0ac0009STakashi Sakamoto } 262b0ac0009STakashi Sakamoto 26320358d44STakashi Sakamoto if (stream == &oxfw->tx_stream) 26420358d44STakashi Sakamoto dir = AVC_GENERAL_PLUG_DIR_OUT; 26520358d44STakashi Sakamoto else 26620358d44STakashi Sakamoto dir = AVC_GENERAL_PLUG_DIR_IN; 267b0ac0009STakashi Sakamoto 268b0ac0009STakashi Sakamoto err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation); 269e2786ca6STakashi Sakamoto if (err < 0) 27020358d44STakashi Sakamoto return err; 27105588d34STakashi Sakamoto if (rate == 0) 27205588d34STakashi Sakamoto rate = formation.rate; 27305588d34STakashi Sakamoto if (pcm_channels == 0) 27405588d34STakashi Sakamoto pcm_channels = formation.pcm; 275e2786ca6STakashi Sakamoto 276da2af86dSTakashi Sakamoto if (formation.rate != rate || formation.pcm != pcm_channels || 27720358d44STakashi Sakamoto amdtp_streaming_error(&oxfw->rx_stream) || 27820358d44STakashi Sakamoto amdtp_streaming_error(&oxfw->tx_stream)) { 279e34244ddSTakashi Sakamoto amdtp_stream_stop(&oxfw->rx_stream); 280e34244ddSTakashi Sakamoto cmp_connection_break(&oxfw->in_conn); 281e34244ddSTakashi Sakamoto 282e34244ddSTakashi Sakamoto if (oxfw->has_output) { 283e34244ddSTakashi Sakamoto amdtp_stream_stop(&oxfw->tx_stream); 284e34244ddSTakashi Sakamoto cmp_connection_break(&oxfw->out_conn); 285e34244ddSTakashi Sakamoto } 286f3699e2cSTakashi Sakamoto 287b0ac0009STakashi Sakamoto err = set_stream_format(oxfw, stream, rate, pcm_channels); 288f3699e2cSTakashi Sakamoto if (err < 0) { 289f3699e2cSTakashi Sakamoto dev_err(&oxfw->unit->device, 290f3699e2cSTakashi Sakamoto "fail to set stream format: %d\n", err); 29120358d44STakashi Sakamoto return err; 29220358d44STakashi Sakamoto } 293f3699e2cSTakashi Sakamoto } 294b0ac0009STakashi Sakamoto 29520358d44STakashi Sakamoto if (!amdtp_stream_running(&oxfw->rx_stream)) { 29620358d44STakashi Sakamoto err = start_stream(oxfw, &oxfw->rx_stream); 297b0ac0009STakashi Sakamoto if (err < 0) { 298b0ac0009STakashi Sakamoto dev_err(&oxfw->unit->device, 29920358d44STakashi Sakamoto "fail to start rx stream: %d\n", err); 30020358d44STakashi Sakamoto goto error; 30120358d44STakashi Sakamoto } 30220358d44STakashi Sakamoto } 30320358d44STakashi Sakamoto 30420358d44STakashi Sakamoto if (oxfw->has_output) { 30520358d44STakashi Sakamoto if (!amdtp_stream_running(&oxfw->tx_stream)) { 30620358d44STakashi Sakamoto err = start_stream(oxfw, &oxfw->tx_stream); 30720358d44STakashi Sakamoto if (err < 0) { 30820358d44STakashi Sakamoto dev_err(&oxfw->unit->device, 30920358d44STakashi Sakamoto "fail to start tx stream: %d\n", err); 31020358d44STakashi Sakamoto goto error; 311b0ac0009STakashi Sakamoto } 312b0ac0009STakashi Sakamoto } 313f3699e2cSTakashi Sakamoto } 314f3699e2cSTakashi Sakamoto 31520358d44STakashi Sakamoto return 0; 31620358d44STakashi Sakamoto error: 317e34244ddSTakashi Sakamoto amdtp_stream_stop(&oxfw->rx_stream); 31820358d44STakashi Sakamoto cmp_connection_break(&oxfw->in_conn); 31920358d44STakashi Sakamoto if (oxfw->has_output) { 320e34244ddSTakashi Sakamoto amdtp_stream_stop(&oxfw->tx_stream); 32120358d44STakashi Sakamoto cmp_connection_break(&oxfw->out_conn); 322b0ac0009STakashi Sakamoto } 323e2786ca6STakashi Sakamoto return err; 324e2786ca6STakashi Sakamoto } 325e2786ca6STakashi Sakamoto 326b0ac0009STakashi Sakamoto void snd_oxfw_stream_stop_simplex(struct snd_oxfw *oxfw, 327b0ac0009STakashi Sakamoto struct amdtp_stream *stream) 328e2786ca6STakashi Sakamoto { 32920358d44STakashi Sakamoto if (oxfw->capture_substreams == 0 && oxfw->playback_substreams == 0) { 330e34244ddSTakashi Sakamoto amdtp_stream_stop(&oxfw->rx_stream); 331e34244ddSTakashi Sakamoto cmp_connection_break(&oxfw->in_conn); 332b0ac0009STakashi Sakamoto 333e34244ddSTakashi Sakamoto if (oxfw->has_output) { 334e34244ddSTakashi Sakamoto amdtp_stream_stop(&oxfw->tx_stream); 335e34244ddSTakashi Sakamoto cmp_connection_break(&oxfw->out_conn); 336e34244ddSTakashi Sakamoto } 33720358d44STakashi Sakamoto } 338e2786ca6STakashi Sakamoto } 339e2786ca6STakashi Sakamoto 340d23c2cc4STakashi Sakamoto /* 341d23c2cc4STakashi Sakamoto * This function should be called before starting the stream or after stopping 342d23c2cc4STakashi Sakamoto * the streams. 343d23c2cc4STakashi Sakamoto */ 344b0ac0009STakashi Sakamoto void snd_oxfw_stream_destroy_simplex(struct snd_oxfw *oxfw, 345b0ac0009STakashi Sakamoto struct amdtp_stream *stream) 346e2786ca6STakashi Sakamoto { 347b0ac0009STakashi Sakamoto struct cmp_connection *conn; 348e2786ca6STakashi Sakamoto 349b0ac0009STakashi Sakamoto if (stream == &oxfw->tx_stream) 350b0ac0009STakashi Sakamoto conn = &oxfw->out_conn; 351e2786ca6STakashi Sakamoto else 352b0ac0009STakashi Sakamoto conn = &oxfw->in_conn; 353b0ac0009STakashi Sakamoto 354b0ac0009STakashi Sakamoto amdtp_stream_destroy(stream); 355b0ac0009STakashi Sakamoto cmp_connection_destroy(conn); 356b0ac0009STakashi Sakamoto } 357b0ac0009STakashi Sakamoto 358b0ac0009STakashi Sakamoto void snd_oxfw_stream_update_simplex(struct snd_oxfw *oxfw, 359b0ac0009STakashi Sakamoto struct amdtp_stream *stream) 360b0ac0009STakashi Sakamoto { 361e34244ddSTakashi Sakamoto amdtp_stream_stop(&oxfw->rx_stream); 362e34244ddSTakashi Sakamoto cmp_connection_break(&oxfw->in_conn); 363b0ac0009STakashi Sakamoto 364e34244ddSTakashi Sakamoto amdtp_stream_pcm_abort(&oxfw->rx_stream); 365e34244ddSTakashi Sakamoto 366e34244ddSTakashi Sakamoto if (oxfw->has_output) { 367e34244ddSTakashi Sakamoto amdtp_stream_stop(&oxfw->tx_stream); 368e34244ddSTakashi Sakamoto cmp_connection_break(&oxfw->out_conn); 369e34244ddSTakashi Sakamoto 370e34244ddSTakashi Sakamoto amdtp_stream_pcm_abort(&oxfw->tx_stream); 371e34244ddSTakashi Sakamoto } 372e2786ca6STakashi Sakamoto } 3735cd1d3f4STakashi Sakamoto 3743c96101fSTakashi Sakamoto int snd_oxfw_stream_get_current_formation(struct snd_oxfw *oxfw, 3753c96101fSTakashi Sakamoto enum avc_general_plug_dir dir, 3763c96101fSTakashi Sakamoto struct snd_oxfw_stream_formation *formation) 3773c96101fSTakashi Sakamoto { 3783c96101fSTakashi Sakamoto u8 *format; 3793c96101fSTakashi Sakamoto unsigned int len; 3803c96101fSTakashi Sakamoto int err; 3813c96101fSTakashi Sakamoto 3823c96101fSTakashi Sakamoto len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 3833c96101fSTakashi Sakamoto format = kmalloc(len, GFP_KERNEL); 3843c96101fSTakashi Sakamoto if (format == NULL) 3853c96101fSTakashi Sakamoto return -ENOMEM; 3863c96101fSTakashi Sakamoto 3873c96101fSTakashi Sakamoto err = avc_stream_get_format_single(oxfw->unit, dir, 0, format, &len); 3883c96101fSTakashi Sakamoto if (err < 0) 3893c96101fSTakashi Sakamoto goto end; 3903c96101fSTakashi Sakamoto if (len < 3) { 3913c96101fSTakashi Sakamoto err = -EIO; 3923c96101fSTakashi Sakamoto goto end; 3933c96101fSTakashi Sakamoto } 3943c96101fSTakashi Sakamoto 3953c96101fSTakashi Sakamoto err = snd_oxfw_stream_parse_format(format, formation); 3963c96101fSTakashi Sakamoto end: 3973c96101fSTakashi Sakamoto kfree(format); 3983c96101fSTakashi Sakamoto return err; 3993c96101fSTakashi Sakamoto } 4003c96101fSTakashi Sakamoto 4015cd1d3f4STakashi Sakamoto /* 4025cd1d3f4STakashi Sakamoto * See Table 6.16 - AM824 Stream Format 4035cd1d3f4STakashi Sakamoto * Figure 6.19 - format_information field for AM824 Compound 4045cd1d3f4STakashi Sakamoto * in AV/C Stream Format Information Specification 1.1 (Apr 2005, 1394TA) 4055cd1d3f4STakashi Sakamoto * Also 'Clause 12 AM824 sequence adaption layers' in IEC 61883-6:2005 4065cd1d3f4STakashi Sakamoto */ 4075cd1d3f4STakashi Sakamoto int snd_oxfw_stream_parse_format(u8 *format, 4085cd1d3f4STakashi Sakamoto struct snd_oxfw_stream_formation *formation) 4095cd1d3f4STakashi Sakamoto { 4105cd1d3f4STakashi Sakamoto unsigned int i, e, channels, type; 4115cd1d3f4STakashi Sakamoto 4125cd1d3f4STakashi Sakamoto memset(formation, 0, sizeof(struct snd_oxfw_stream_formation)); 4135cd1d3f4STakashi Sakamoto 4145cd1d3f4STakashi Sakamoto /* 4155cd1d3f4STakashi Sakamoto * this module can support a hierarchy combination that: 4165cd1d3f4STakashi Sakamoto * Root: Audio and Music (0x90) 4175cd1d3f4STakashi Sakamoto * Level 1: AM824 Compound (0x40) 4185cd1d3f4STakashi Sakamoto */ 4195cd1d3f4STakashi Sakamoto if ((format[0] != 0x90) || (format[1] != 0x40)) 4205cd1d3f4STakashi Sakamoto return -ENOSYS; 4215cd1d3f4STakashi Sakamoto 4225cd1d3f4STakashi Sakamoto /* check the sampling rate */ 4235cd1d3f4STakashi Sakamoto for (i = 0; i < ARRAY_SIZE(avc_stream_rate_table); i++) { 4245cd1d3f4STakashi Sakamoto if (format[2] == avc_stream_rate_table[i]) 4255cd1d3f4STakashi Sakamoto break; 4265cd1d3f4STakashi Sakamoto } 4275cd1d3f4STakashi Sakamoto if (i == ARRAY_SIZE(avc_stream_rate_table)) 4285cd1d3f4STakashi Sakamoto return -ENOSYS; 4295cd1d3f4STakashi Sakamoto 4305cd1d3f4STakashi Sakamoto formation->rate = oxfw_rate_table[i]; 4315cd1d3f4STakashi Sakamoto 4325cd1d3f4STakashi Sakamoto for (e = 0; e < format[4]; e++) { 4335cd1d3f4STakashi Sakamoto channels = format[5 + e * 2]; 4345cd1d3f4STakashi Sakamoto type = format[6 + e * 2]; 4355cd1d3f4STakashi Sakamoto 4365cd1d3f4STakashi Sakamoto switch (type) { 4375cd1d3f4STakashi Sakamoto /* IEC 60958 Conformant, currently handled as MBLA */ 4385cd1d3f4STakashi Sakamoto case 0x00: 4395cd1d3f4STakashi Sakamoto /* Multi Bit Linear Audio (Raw) */ 4405cd1d3f4STakashi Sakamoto case 0x06: 4415cd1d3f4STakashi Sakamoto formation->pcm += channels; 4425cd1d3f4STakashi Sakamoto break; 4435cd1d3f4STakashi Sakamoto /* MIDI Conformant */ 4445cd1d3f4STakashi Sakamoto case 0x0d: 4455cd1d3f4STakashi Sakamoto formation->midi = channels; 4465cd1d3f4STakashi Sakamoto break; 4475cd1d3f4STakashi Sakamoto /* IEC 61937-3 to 7 */ 4485cd1d3f4STakashi Sakamoto case 0x01: 4495cd1d3f4STakashi Sakamoto case 0x02: 4505cd1d3f4STakashi Sakamoto case 0x03: 4515cd1d3f4STakashi Sakamoto case 0x04: 4525cd1d3f4STakashi Sakamoto case 0x05: 4535cd1d3f4STakashi Sakamoto /* Multi Bit Linear Audio */ 4545cd1d3f4STakashi Sakamoto case 0x07: /* DVD-Audio */ 4555cd1d3f4STakashi Sakamoto case 0x0c: /* High Precision */ 4565cd1d3f4STakashi Sakamoto /* One Bit Audio */ 4575cd1d3f4STakashi Sakamoto case 0x08: /* (Plain) Raw */ 4585cd1d3f4STakashi Sakamoto case 0x09: /* (Plain) SACD */ 4595cd1d3f4STakashi Sakamoto case 0x0a: /* (Encoded) Raw */ 4605cd1d3f4STakashi Sakamoto case 0x0b: /* (Encoded) SACD */ 4615cd1d3f4STakashi Sakamoto /* SMPTE Time-Code conformant */ 4625cd1d3f4STakashi Sakamoto case 0x0e: 4635cd1d3f4STakashi Sakamoto /* Sample Count */ 4645cd1d3f4STakashi Sakamoto case 0x0f: 4655cd1d3f4STakashi Sakamoto /* Anciliary Data */ 4665cd1d3f4STakashi Sakamoto case 0x10: 4675cd1d3f4STakashi Sakamoto /* Synchronization Stream (Stereo Raw audio) */ 4685cd1d3f4STakashi Sakamoto case 0x40: 4695cd1d3f4STakashi Sakamoto /* Don't care */ 4705cd1d3f4STakashi Sakamoto case 0xff: 4715cd1d3f4STakashi Sakamoto default: 4725cd1d3f4STakashi Sakamoto return -ENOSYS; /* not supported */ 4735cd1d3f4STakashi Sakamoto } 4745cd1d3f4STakashi Sakamoto } 4755cd1d3f4STakashi Sakamoto 47649c7b3fcSTakashi Sakamoto if (formation->pcm > AM824_MAX_CHANNELS_FOR_PCM || 47749c7b3fcSTakashi Sakamoto formation->midi > AM824_MAX_CHANNELS_FOR_MIDI) 4785cd1d3f4STakashi Sakamoto return -ENOSYS; 4795cd1d3f4STakashi Sakamoto 4805cd1d3f4STakashi Sakamoto return 0; 4815cd1d3f4STakashi Sakamoto } 4825cd1d3f4STakashi Sakamoto 4835cd1d3f4STakashi Sakamoto static int 4845cd1d3f4STakashi Sakamoto assume_stream_formats(struct snd_oxfw *oxfw, enum avc_general_plug_dir dir, 4855cd1d3f4STakashi Sakamoto unsigned int pid, u8 *buf, unsigned int *len, 4865cd1d3f4STakashi Sakamoto u8 **formats) 4875cd1d3f4STakashi Sakamoto { 4885cd1d3f4STakashi Sakamoto struct snd_oxfw_stream_formation formation; 4895cd1d3f4STakashi Sakamoto unsigned int i, eid; 4905cd1d3f4STakashi Sakamoto int err; 4915cd1d3f4STakashi Sakamoto 4925cd1d3f4STakashi Sakamoto /* get format at current sampling rate */ 4935cd1d3f4STakashi Sakamoto err = avc_stream_get_format_single(oxfw->unit, dir, pid, buf, len); 4945cd1d3f4STakashi Sakamoto if (err < 0) { 4955cd1d3f4STakashi Sakamoto dev_err(&oxfw->unit->device, 4965cd1d3f4STakashi Sakamoto "fail to get current stream format for isoc %s plug %d:%d\n", 4975cd1d3f4STakashi Sakamoto (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : "out", 4985cd1d3f4STakashi Sakamoto pid, err); 4995cd1d3f4STakashi Sakamoto goto end; 5005cd1d3f4STakashi Sakamoto } 5015cd1d3f4STakashi Sakamoto 5025cd1d3f4STakashi Sakamoto /* parse and set stream format */ 5035cd1d3f4STakashi Sakamoto eid = 0; 5045cd1d3f4STakashi Sakamoto err = snd_oxfw_stream_parse_format(buf, &formation); 5055cd1d3f4STakashi Sakamoto if (err < 0) 5065cd1d3f4STakashi Sakamoto goto end; 5075cd1d3f4STakashi Sakamoto 508cd3b7116STakashi Sakamoto formats[eid] = devm_kmemdup(&oxfw->card->card_dev, buf, *len, 509cd3b7116STakashi Sakamoto GFP_KERNEL); 510cd3b7116STakashi Sakamoto if (!formats[eid]) { 5115cd1d3f4STakashi Sakamoto err = -ENOMEM; 5125cd1d3f4STakashi Sakamoto goto end; 5135cd1d3f4STakashi Sakamoto } 5145cd1d3f4STakashi Sakamoto 5155cd1d3f4STakashi Sakamoto /* apply the format for each available sampling rate */ 5165cd1d3f4STakashi Sakamoto for (i = 0; i < ARRAY_SIZE(oxfw_rate_table); i++) { 5175cd1d3f4STakashi Sakamoto if (formation.rate == oxfw_rate_table[i]) 5185cd1d3f4STakashi Sakamoto continue; 5195cd1d3f4STakashi Sakamoto 5205cd1d3f4STakashi Sakamoto err = avc_general_inquiry_sig_fmt(oxfw->unit, 5215cd1d3f4STakashi Sakamoto oxfw_rate_table[i], 5225cd1d3f4STakashi Sakamoto dir, pid); 5235cd1d3f4STakashi Sakamoto if (err < 0) 5245cd1d3f4STakashi Sakamoto continue; 5255cd1d3f4STakashi Sakamoto 5265cd1d3f4STakashi Sakamoto eid++; 527cd3b7116STakashi Sakamoto formats[eid] = devm_kmemdup(&oxfw->card->card_dev, buf, *len, 528cd3b7116STakashi Sakamoto GFP_KERNEL); 5295cd1d3f4STakashi Sakamoto if (formats[eid] == NULL) { 5305cd1d3f4STakashi Sakamoto err = -ENOMEM; 5315cd1d3f4STakashi Sakamoto goto end; 5325cd1d3f4STakashi Sakamoto } 5335cd1d3f4STakashi Sakamoto formats[eid][2] = avc_stream_rate_table[i]; 5345cd1d3f4STakashi Sakamoto } 5355cd1d3f4STakashi Sakamoto 5365cd1d3f4STakashi Sakamoto err = 0; 5375cd1d3f4STakashi Sakamoto oxfw->assumed = true; 5385cd1d3f4STakashi Sakamoto end: 5395cd1d3f4STakashi Sakamoto return err; 5405cd1d3f4STakashi Sakamoto } 5415cd1d3f4STakashi Sakamoto 5425cd1d3f4STakashi Sakamoto static int fill_stream_formats(struct snd_oxfw *oxfw, 5435cd1d3f4STakashi Sakamoto enum avc_general_plug_dir dir, 5445cd1d3f4STakashi Sakamoto unsigned short pid) 5455cd1d3f4STakashi Sakamoto { 5465cd1d3f4STakashi Sakamoto u8 *buf, **formats; 5475cd1d3f4STakashi Sakamoto unsigned int len, eid = 0; 5485cd1d3f4STakashi Sakamoto struct snd_oxfw_stream_formation dummy; 5495cd1d3f4STakashi Sakamoto int err; 5505cd1d3f4STakashi Sakamoto 5515cd1d3f4STakashi Sakamoto buf = kmalloc(AVC_GENERIC_FRAME_MAXIMUM_BYTES, GFP_KERNEL); 5525cd1d3f4STakashi Sakamoto if (buf == NULL) 5535cd1d3f4STakashi Sakamoto return -ENOMEM; 5545cd1d3f4STakashi Sakamoto 555b0ac0009STakashi Sakamoto if (dir == AVC_GENERAL_PLUG_DIR_OUT) 556b0ac0009STakashi Sakamoto formats = oxfw->tx_stream_formats; 557b0ac0009STakashi Sakamoto else 5585cd1d3f4STakashi Sakamoto formats = oxfw->rx_stream_formats; 5595cd1d3f4STakashi Sakamoto 5605cd1d3f4STakashi Sakamoto /* get first entry */ 5615cd1d3f4STakashi Sakamoto len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 5625cd1d3f4STakashi Sakamoto err = avc_stream_get_format_list(oxfw->unit, dir, 0, buf, &len, 0); 5635cd1d3f4STakashi Sakamoto if (err == -ENOSYS) { 5645cd1d3f4STakashi Sakamoto /* LIST subfunction is not implemented */ 5655cd1d3f4STakashi Sakamoto len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 5665cd1d3f4STakashi Sakamoto err = assume_stream_formats(oxfw, dir, pid, buf, &len, 5675cd1d3f4STakashi Sakamoto formats); 5685cd1d3f4STakashi Sakamoto goto end; 5695cd1d3f4STakashi Sakamoto } else if (err < 0) { 5705cd1d3f4STakashi Sakamoto dev_err(&oxfw->unit->device, 5715cd1d3f4STakashi Sakamoto "fail to get stream format %d for isoc %s plug %d:%d\n", 5725cd1d3f4STakashi Sakamoto eid, (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : "out", 5735cd1d3f4STakashi Sakamoto pid, err); 5745cd1d3f4STakashi Sakamoto goto end; 5755cd1d3f4STakashi Sakamoto } 5765cd1d3f4STakashi Sakamoto 5775cd1d3f4STakashi Sakamoto /* LIST subfunction is implemented */ 5785cd1d3f4STakashi Sakamoto while (eid < SND_OXFW_STREAM_FORMAT_ENTRIES) { 5795cd1d3f4STakashi Sakamoto /* The format is too short. */ 5805cd1d3f4STakashi Sakamoto if (len < 3) { 5815cd1d3f4STakashi Sakamoto err = -EIO; 5825cd1d3f4STakashi Sakamoto break; 5835cd1d3f4STakashi Sakamoto } 5845cd1d3f4STakashi Sakamoto 5855cd1d3f4STakashi Sakamoto /* parse and set stream format */ 5865cd1d3f4STakashi Sakamoto err = snd_oxfw_stream_parse_format(buf, &dummy); 5875cd1d3f4STakashi Sakamoto if (err < 0) 5885cd1d3f4STakashi Sakamoto break; 5895cd1d3f4STakashi Sakamoto 590cd3b7116STakashi Sakamoto formats[eid] = devm_kmemdup(&oxfw->card->card_dev, buf, len, 591cd3b7116STakashi Sakamoto GFP_KERNEL); 592cd3b7116STakashi Sakamoto if (!formats[eid]) { 5935cd1d3f4STakashi Sakamoto err = -ENOMEM; 5945cd1d3f4STakashi Sakamoto break; 5955cd1d3f4STakashi Sakamoto } 5965cd1d3f4STakashi Sakamoto 5975cd1d3f4STakashi Sakamoto /* get next entry */ 5985cd1d3f4STakashi Sakamoto len = AVC_GENERIC_FRAME_MAXIMUM_BYTES; 5995cd1d3f4STakashi Sakamoto err = avc_stream_get_format_list(oxfw->unit, dir, 0, 6005cd1d3f4STakashi Sakamoto buf, &len, ++eid); 6015cd1d3f4STakashi Sakamoto /* No entries remained. */ 6025cd1d3f4STakashi Sakamoto if (err == -EINVAL) { 6035cd1d3f4STakashi Sakamoto err = 0; 6045cd1d3f4STakashi Sakamoto break; 6055cd1d3f4STakashi Sakamoto } else if (err < 0) { 6065cd1d3f4STakashi Sakamoto dev_err(&oxfw->unit->device, 6075cd1d3f4STakashi Sakamoto "fail to get stream format %d for isoc %s plug %d:%d\n", 6085cd1d3f4STakashi Sakamoto eid, (dir == AVC_GENERAL_PLUG_DIR_IN) ? "in" : 6095cd1d3f4STakashi Sakamoto "out", 6105cd1d3f4STakashi Sakamoto pid, err); 6115cd1d3f4STakashi Sakamoto break; 6125cd1d3f4STakashi Sakamoto } 6135cd1d3f4STakashi Sakamoto } 6145cd1d3f4STakashi Sakamoto end: 6155cd1d3f4STakashi Sakamoto kfree(buf); 6165cd1d3f4STakashi Sakamoto return err; 6175cd1d3f4STakashi Sakamoto } 6185cd1d3f4STakashi Sakamoto 6195cd1d3f4STakashi Sakamoto int snd_oxfw_stream_discover(struct snd_oxfw *oxfw) 6205cd1d3f4STakashi Sakamoto { 6215cd1d3f4STakashi Sakamoto u8 plugs[AVC_PLUG_INFO_BUF_BYTES]; 62232056041STakashi Sakamoto struct snd_oxfw_stream_formation formation; 62332056041STakashi Sakamoto u8 *format; 62432056041STakashi Sakamoto unsigned int i; 6255cd1d3f4STakashi Sakamoto int err; 6265cd1d3f4STakashi Sakamoto 6275cd1d3f4STakashi Sakamoto /* the number of plugs for isoc in/out, ext in/out */ 6285cd1d3f4STakashi Sakamoto err = avc_general_get_plug_info(oxfw->unit, 0x1f, 0x07, 0x00, plugs); 6295cd1d3f4STakashi Sakamoto if (err < 0) { 6305cd1d3f4STakashi Sakamoto dev_err(&oxfw->unit->device, 6315cd1d3f4STakashi Sakamoto "fail to get info for isoc/external in/out plugs: %d\n", 6325cd1d3f4STakashi Sakamoto err); 6335cd1d3f4STakashi Sakamoto goto end; 634b0ac0009STakashi Sakamoto } else if ((plugs[0] == 0) && (plugs[1] == 0)) { 6355cd1d3f4STakashi Sakamoto err = -ENOSYS; 6365cd1d3f4STakashi Sakamoto goto end; 6375cd1d3f4STakashi Sakamoto } 6385cd1d3f4STakashi Sakamoto 639b0ac0009STakashi Sakamoto /* use oPCR[0] if exists */ 640b0ac0009STakashi Sakamoto if (plugs[1] > 0) { 641b0ac0009STakashi Sakamoto err = fill_stream_formats(oxfw, AVC_GENERAL_PLUG_DIR_OUT, 0); 642b0ac0009STakashi Sakamoto if (err < 0) 643b0ac0009STakashi Sakamoto goto end; 64432056041STakashi Sakamoto 64532056041STakashi Sakamoto for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 64632056041STakashi Sakamoto format = oxfw->tx_stream_formats[i]; 64732056041STakashi Sakamoto if (format == NULL) 64832056041STakashi Sakamoto continue; 64932056041STakashi Sakamoto err = snd_oxfw_stream_parse_format(format, &formation); 65032056041STakashi Sakamoto if (err < 0) 65132056041STakashi Sakamoto continue; 65232056041STakashi Sakamoto 65332056041STakashi Sakamoto /* Add one MIDI port. */ 65432056041STakashi Sakamoto if (formation.midi > 0) 65532056041STakashi Sakamoto oxfw->midi_input_ports = 1; 65632056041STakashi Sakamoto } 65732056041STakashi Sakamoto 658b0ac0009STakashi Sakamoto oxfw->has_output = true; 659b0ac0009STakashi Sakamoto } 660b0ac0009STakashi Sakamoto 6615cd1d3f4STakashi Sakamoto /* use iPCR[0] if exists */ 66232056041STakashi Sakamoto if (plugs[0] > 0) { 6635cd1d3f4STakashi Sakamoto err = fill_stream_formats(oxfw, AVC_GENERAL_PLUG_DIR_IN, 0); 66432056041STakashi Sakamoto if (err < 0) 66532056041STakashi Sakamoto goto end; 66632056041STakashi Sakamoto 66732056041STakashi Sakamoto for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) { 66832056041STakashi Sakamoto format = oxfw->rx_stream_formats[i]; 66932056041STakashi Sakamoto if (format == NULL) 67032056041STakashi Sakamoto continue; 67132056041STakashi Sakamoto err = snd_oxfw_stream_parse_format(format, &formation); 67232056041STakashi Sakamoto if (err < 0) 67332056041STakashi Sakamoto continue; 67432056041STakashi Sakamoto 67532056041STakashi Sakamoto /* Add one MIDI port. */ 67632056041STakashi Sakamoto if (formation.midi > 0) 67732056041STakashi Sakamoto oxfw->midi_output_ports = 1; 67832056041STakashi Sakamoto } 67932056041STakashi Sakamoto } 6805cd1d3f4STakashi Sakamoto end: 6815cd1d3f4STakashi Sakamoto return err; 6825cd1d3f4STakashi Sakamoto } 6838985f4acSTakashi Sakamoto 6848985f4acSTakashi Sakamoto void snd_oxfw_stream_lock_changed(struct snd_oxfw *oxfw) 6858985f4acSTakashi Sakamoto { 6868985f4acSTakashi Sakamoto oxfw->dev_lock_changed = true; 6878985f4acSTakashi Sakamoto wake_up(&oxfw->hwdep_wait); 6888985f4acSTakashi Sakamoto } 6898985f4acSTakashi Sakamoto 6908985f4acSTakashi Sakamoto int snd_oxfw_stream_lock_try(struct snd_oxfw *oxfw) 6918985f4acSTakashi Sakamoto { 6928985f4acSTakashi Sakamoto int err; 6938985f4acSTakashi Sakamoto 6948985f4acSTakashi Sakamoto spin_lock_irq(&oxfw->lock); 6958985f4acSTakashi Sakamoto 6968985f4acSTakashi Sakamoto /* user land lock this */ 6978985f4acSTakashi Sakamoto if (oxfw->dev_lock_count < 0) { 6988985f4acSTakashi Sakamoto err = -EBUSY; 6998985f4acSTakashi Sakamoto goto end; 7008985f4acSTakashi Sakamoto } 7018985f4acSTakashi Sakamoto 7028985f4acSTakashi Sakamoto /* this is the first time */ 7038985f4acSTakashi Sakamoto if (oxfw->dev_lock_count++ == 0) 7048985f4acSTakashi Sakamoto snd_oxfw_stream_lock_changed(oxfw); 7058985f4acSTakashi Sakamoto err = 0; 7068985f4acSTakashi Sakamoto end: 7078985f4acSTakashi Sakamoto spin_unlock_irq(&oxfw->lock); 7088985f4acSTakashi Sakamoto return err; 7098985f4acSTakashi Sakamoto } 7108985f4acSTakashi Sakamoto 7118985f4acSTakashi Sakamoto void snd_oxfw_stream_lock_release(struct snd_oxfw *oxfw) 7128985f4acSTakashi Sakamoto { 7138985f4acSTakashi Sakamoto spin_lock_irq(&oxfw->lock); 7148985f4acSTakashi Sakamoto 7158985f4acSTakashi Sakamoto if (WARN_ON(oxfw->dev_lock_count <= 0)) 7168985f4acSTakashi Sakamoto goto end; 7178985f4acSTakashi Sakamoto if (--oxfw->dev_lock_count == 0) 7188985f4acSTakashi Sakamoto snd_oxfw_stream_lock_changed(oxfw); 7198985f4acSTakashi Sakamoto end: 7208985f4acSTakashi Sakamoto spin_unlock_irq(&oxfw->lock); 7218985f4acSTakashi Sakamoto } 722