sound/soc/intel/baytrail/sst-baytrail-ipc.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Intel Baytrail SST IPC Support
   4  * Copyright (c) 2014, Intel Corporation.
   5  */
   6
   7 #include <linux/types.h>
   8 #include <linux/kernel.h>
   9 #include <linux/list.h>
  10 #include <linux/device.h>
  11 #include <linux/wait.h>
  12 #include <linux/spinlock.h>
  13 #include <linux/workqueue.h>
  14 #include <linux/export.h>
  15 #include <linux/slab.h>
  16 #include <linux/delay.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/firmware.h>
  19 #include <linux/io.h>
  20 #include <asm/div64.h>
  21
  22 #include "sst-baytrail-ipc.h"
  23 #include "../common/sst-dsp.h"
  24 #include "../common/sst-dsp-priv.h"
  25 #include "../common/sst-ipc.h"
  26
  27 /* IPC message timeout */
  28 #define IPC_TIMEOUT_MSECS       300
  29 #define IPC_BOOT_MSECS          200
  30
  31 #define IPC_EMPTY_LIST_SIZE     8
  32
  33 /* IPC header bits */
  34 #define IPC_HEADER_MSG_ID_MASK  0xff
  35 #define IPC_HEADER_MSG_ID(x)    ((x) & IPC_HEADER_MSG_ID_MASK)
  36 #define IPC_HEADER_STR_ID_SHIFT 8
  37 #define IPC_HEADER_STR_ID_MASK  0x1f
  38 #define IPC_HEADER_STR_ID(x)    (((x) & 0x1f) << IPC_HEADER_STR_ID_SHIFT)
  39 #define IPC_HEADER_LARGE_SHIFT  13
  40 #define IPC_HEADER_LARGE(x)     (((x) & 0x1) << IPC_HEADER_LARGE_SHIFT)
  41 #define IPC_HEADER_DATA_SHIFT   16
  42 #define IPC_HEADER_DATA_MASK    0x3fff
  43 #define IPC_HEADER_DATA(x)      (((x) & 0x3fff) << IPC_HEADER_DATA_SHIFT)
  44
  45 /* mask for differentiating between notification and reply message */
  46 #define IPC_NOTIFICATION        (0x1 << 7)
  47
  48 /* I2L Stream config/control msgs */
  49 #define IPC_IA_ALLOC_STREAM     0x20
  50 #define IPC_IA_FREE_STREAM      0x21
  51 #define IPC_IA_PAUSE_STREAM     0x24
  52 #define IPC_IA_RESUME_STREAM    0x25
  53 #define IPC_IA_DROP_STREAM      0x26
  54 #define IPC_IA_START_STREAM     0x30
  55
  56 /* notification messages */
  57 #define IPC_IA_FW_INIT_CMPLT    0x81
  58 #define IPC_SST_PERIOD_ELAPSED  0x97
  59
  60 /* IPC messages between host and ADSP */
  61 struct sst_byt_address_info {
  62         u32 addr;
  63         u32 size;
  64 } __packed;
  65
  66 struct sst_byt_str_type {
  67         u8 codec_type;
  68         u8 str_type;
  69         u8 operation;
  70         u8 protected_str;
  71         u8 time_slots;
  72         u8 reserved;
  73         u16 result;
  74 } __packed;
  75
  76 struct sst_byt_pcm_params {
  77         u8 num_chan;
  78         u8 pcm_wd_sz;
  79         u8 use_offload_path;
  80         u8 reserved;
  81         u32 sfreq;
  82         u8 channel_map[8];
  83 } __packed;
  84
  85 struct sst_byt_frames_info {
  86         u16 num_entries;
  87         u16 rsrvd;
  88         u32 frag_size;
  89         struct sst_byt_address_info ring_buf_info[8];
  90 } __packed;
  91
  92 struct sst_byt_alloc_params {
  93         struct sst_byt_str_type str_type;
  94         struct sst_byt_pcm_params pcm_params;
  95         struct sst_byt_frames_info frame_info;
  96 } __packed;
  97
  98 struct sst_byt_alloc_response {
  99         struct sst_byt_str_type str_type;
 100         u8 reserved[88];
 101 } __packed;
 102
 103 struct sst_byt_start_stream_params {
 104         u32 byte_offset;
 105 } __packed;
 106
 107 struct sst_byt_tstamp {
 108         u64 ring_buffer_counter;
 109         u64 hardware_counter;
 110         u64 frames_decoded;
 111         u64 bytes_decoded;
 112         u64 bytes_copied;
 113         u32 sampling_frequency;
 114         u32 channel_peak[8];
 115 } __packed;
 116
 117 struct sst_byt_fw_version {
 118         u8 build;
 119         u8 minor;
 120         u8 major;
 121         u8 type;
 122 } __packed;
 123
 124 struct sst_byt_fw_build_info {
 125         u8 date[16];
 126         u8 time[16];
 127 } __packed;
 128
 129 struct sst_byt_fw_init {
 130         struct sst_byt_fw_version fw_version;
 131         struct sst_byt_fw_build_info build_info;
 132         u16 result;
 133         u8 module_id;
 134         u8 debug_info;
 135 } __packed;
 136
 137 struct sst_byt_stream;
 138 struct sst_byt;
 139
 140 /* stream infomation */
 141 struct sst_byt_stream {
 142         struct list_head node;
 143
 144         /* configuration */
 145         struct sst_byt_alloc_params request;
 146         struct sst_byt_alloc_response reply;
 147
 148         /* runtime info */
 149         struct sst_byt *byt;
 150         int str_id;
 151         bool commited;
 152         bool running;
 153
 154         /* driver callback */
 155         u32 (*notify_position)(struct sst_byt_stream *stream, void *data);
 156         void *pdata;
 157 };
 158
 159 /* SST Baytrail IPC data */
 160 struct sst_byt {
 161         struct device *dev;
 162         struct sst_dsp *dsp;
 163
 164         /* stream */
 165         struct list_head stream_list;
 166
 167         /* boot */
 168         wait_queue_head_t boot_wait;
 169         bool boot_complete;
 170         struct sst_fw *fw;
 171
 172         /* IPC messaging */
 173         struct sst_generic_ipc ipc;
 174 };
 175
 176 static inline u64 sst_byt_header(int msg_id, int data, bool large, int str_id)
 177 {
 178         return IPC_HEADER_MSG_ID(msg_id) | IPC_HEADER_STR_ID(str_id) |
 179                IPC_HEADER_LARGE(large) | IPC_HEADER_DATA(data) |
 180                SST_BYT_IPCX_BUSY;
 181 }
 182
 183 static inline u16 sst_byt_header_msg_id(u64 header)
 184 {
 185         return header & IPC_HEADER_MSG_ID_MASK;
 186 }
 187
 188 static inline u8 sst_byt_header_str_id(u64 header)
 189 {
 190         return (header >> IPC_HEADER_STR_ID_SHIFT) & IPC_HEADER_STR_ID_MASK;
 191 }
 192
 193 static inline u16 sst_byt_header_data(u64 header)
 194 {
 195         return (header >> IPC_HEADER_DATA_SHIFT) & IPC_HEADER_DATA_MASK;
 196 }
 197
 198 static struct sst_byt_stream *sst_byt_get_stream(struct sst_byt *byt,
 199                                                  int stream_id)
 200 {
 201         struct sst_byt_stream *stream;
 202
 203         list_for_each_entry(stream, &byt->stream_list, node) {
 204                 if (stream->str_id == stream_id)
 205                         return stream;
 206         }
 207
 208         return NULL;
 209 }
 210
 211 static void sst_byt_stream_update(struct sst_byt *byt, struct ipc_message *msg)
 212 {
 213         struct sst_byt_stream *stream;
 214         u64 header = msg->tx.header;
 215         u8 stream_id = sst_byt_header_str_id(header);
 216         u8 stream_msg = sst_byt_header_msg_id(header);
 217
 218         stream = sst_byt_get_stream(byt, stream_id);
 219         if (stream == NULL)
 220                 return;
 221
 222         switch (stream_msg) {
 223         case IPC_IA_DROP_STREAM:
 224         case IPC_IA_PAUSE_STREAM:
 225         case IPC_IA_FREE_STREAM:
 226                 stream->running = false;
 227                 break;
 228         case IPC_IA_START_STREAM:
 229         case IPC_IA_RESUME_STREAM:
 230                 stream->running = true;
 231                 break;
 232         }
 233 }
 234
 235 static int sst_byt_process_reply(struct sst_byt *byt, u64 header)
 236 {
 237         struct ipc_message *msg;
 238
 239         msg = sst_ipc_reply_find_msg(&byt->ipc, header);
 240         if (msg == NULL)
 241                 return 1;
 242
 243         msg->rx.header = header;
 244         if (header & IPC_HEADER_LARGE(true)) {
 245                 msg->rx.size = sst_byt_header_data(header);
 246                 sst_dsp_inbox_read(byt->dsp, msg->rx.data, msg->rx.size);
 247         }
 248
 249         /* update any stream states */
 250         sst_byt_stream_update(byt, msg);
 251
 252         list_del(&msg->list);
 253         /* wake up */
 254         sst_ipc_tx_msg_reply_complete(&byt->ipc, msg);
 255
 256         return 1;
 257 }
 258
 259 static void sst_byt_fw_ready(struct sst_byt *byt, u64 header)
 260 {
 261         dev_dbg(byt->dev, "ipc: DSP is ready 0x%llX\n", header);
 262
 263         byt->boot_complete = true;
 264         wake_up(&byt->boot_wait);
 265 }
 266
 267 static int sst_byt_process_notification(struct sst_byt *byt,
 268                                         unsigned long *flags)
 269 {
 270         struct sst_dsp *sst = byt->dsp;
 271         struct sst_byt_stream *stream;
 272         u64 header;
 273         u8 msg_id, stream_id;
 274
 275         header = sst_dsp_shim_read64_unlocked(sst, SST_IPCD);
 276         msg_id = sst_byt_header_msg_id(header);
 277
 278         switch (msg_id) {
 279         case IPC_SST_PERIOD_ELAPSED:
 280                 stream_id = sst_byt_header_str_id(header);
 281                 stream = sst_byt_get_stream(byt, stream_id);
 282                 if (stream && stream->running && stream->notify_position) {
 283                         spin_unlock_irqrestore(&sst->spinlock, *flags);
 284                         stream->notify_position(stream, stream->pdata);
 285                         spin_lock_irqsave(&sst->spinlock, *flags);
 286                 }
 287                 break;
 288         case IPC_IA_FW_INIT_CMPLT:
 289                 sst_byt_fw_ready(byt, header);
 290                 break;
 291         }
 292
 293         return 1;
 294 }
 295
 296 static irqreturn_t sst_byt_irq_thread(int irq, void *context)
 297 {
 298         struct sst_dsp *sst = (struct sst_dsp *) context;
 299         struct sst_byt *byt = sst_dsp_get_thread_context(sst);
 300         struct sst_generic_ipc *ipc = &byt->ipc;
 301         u64 header;
 302         unsigned long flags;
 303
 304         spin_lock_irqsave(&sst->spinlock, flags);
 305
 306         header = sst_dsp_shim_read64_unlocked(sst, SST_IPCD);
 307         if (header & SST_BYT_IPCD_BUSY) {
 308                 if (header & IPC_NOTIFICATION) {
 309                         /* message from ADSP */
 310                         sst_byt_process_notification(byt, &flags);
 311                 } else {
 312                         /* reply from ADSP */
 313                         sst_byt_process_reply(byt, header);
 314                 }
 315                 /*
 316                  * clear IPCD BUSY bit and set DONE bit. Tell DSP we have
 317                  * processed the message and can accept new. Clear data part
 318                  * of the header
 319                  */
 320                 sst_dsp_shim_update_bits64_unlocked(sst, SST_IPCD,
 321                         SST_BYT_IPCD_DONE | SST_BYT_IPCD_BUSY |
 322                         IPC_HEADER_DATA(IPC_HEADER_DATA_MASK),
 323                         SST_BYT_IPCD_DONE);
 324                 /* unmask message request interrupts */
 325                 sst_dsp_shim_update_bits64_unlocked(sst, SST_IMRX,
 326                         SST_BYT_IMRX_REQUEST, 0);
 327         }
 328
 329         spin_unlock_irqrestore(&sst->spinlock, flags);
 330
 331         /* continue to send any remaining messages... */
 332         schedule_work(&ipc->kwork);
 333
 334         return IRQ_HANDLED;
 335 }
 336
 337 /* stream API */
 338 struct sst_byt_stream *sst_byt_stream_new(struct sst_byt *byt, int id,
 339         u32 (*notify_position)(struct sst_byt_stream *stream, void *data),
 340         void *data)
 341 {
 342         struct sst_byt_stream *stream;
 343         struct sst_dsp *sst = byt->dsp;
 344         unsigned long flags;
 345
 346         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 347         if (stream == NULL)
 348                 return NULL;
 349
 350         spin_lock_irqsave(&sst->spinlock, flags);
 351         list_add(&stream->node, &byt->stream_list);
 352         stream->notify_position = notify_position;
 353         stream->pdata = data;
 354         stream->byt = byt;
 355         stream->str_id = id;
 356         spin_unlock_irqrestore(&sst->spinlock, flags);
 357
 358         return stream;
 359 }
 360
 361 int sst_byt_stream_set_bits(struct sst_byt *byt, struct sst_byt_stream *stream,
 362                             int bits)
 363 {
 364         stream->request.pcm_params.pcm_wd_sz = bits;
 365         return 0;
 366 }
 367
 368 int sst_byt_stream_set_channels(struct sst_byt *byt,
 369                                 struct sst_byt_stream *stream, u8 channels)
 370 {
 371         stream->request.pcm_params.num_chan = channels;
 372         return 0;
 373 }
 374
 375 int sst_byt_stream_set_rate(struct sst_byt *byt, struct sst_byt_stream *stream,
 376                             unsigned int rate)
 377 {
 378         stream->request.pcm_params.sfreq = rate;
 379         return 0;
 380 }
 381
 382 /* stream sonfiguration */
 383 int sst_byt_stream_type(struct sst_byt *byt, struct sst_byt_stream *stream,
 384                         int codec_type, int stream_type, int operation)
 385 {
 386         stream->request.str_type.codec_type = codec_type;
 387         stream->request.str_type.str_type = stream_type;
 388         stream->request.str_type.operation = operation;
 389         stream->request.str_type.time_slots = 0xc;
 390
 391         return 0;
 392 }
 393
 394 int sst_byt_stream_buffer(struct sst_byt *byt, struct sst_byt_stream *stream,
 395                           uint32_t buffer_addr, uint32_t buffer_size)
 396 {
 397         stream->request.frame_info.num_entries = 1;
 398         stream->request.frame_info.ring_buf_info[0].addr = buffer_addr;
 399         stream->request.frame_info.ring_buf_info[0].size = buffer_size;
 400         /* calculate bytes per 4 ms fragment */
 401         stream->request.frame_info.frag_size =
 402                 stream->request.pcm_params.sfreq *
 403                 stream->request.pcm_params.num_chan *
 404                 stream->request.pcm_params.pcm_wd_sz / 8 *
 405                 4 / 1000;
 406         return 0;
 407 }
 408
 409 int sst_byt_stream_commit(struct sst_byt *byt, struct sst_byt_stream *stream)
 410 {
 411         struct sst_ipc_message request, reply = {0};
 412         int ret;
 413
 414         request.header = sst_byt_header(IPC_IA_ALLOC_STREAM,
 415                                 sizeof(stream->request) + sizeof(u32),
 416                                 true, stream->str_id);
 417         request.data = &stream->request;
 418         request.size = sizeof(stream->request);
 419         reply.data = &stream->reply;
 420         reply.size = sizeof(stream->reply);
 421
 422         ret = sst_ipc_tx_message_wait(&byt->ipc, request, &reply);
 423         if (ret < 0) {
 424                 dev_err(byt->dev, "ipc: error stream commit failed\n");
 425                 return ret;
 426         }
 427
 428         stream->commited = true;
 429
 430         return 0;
 431 }
 432
 433 int sst_byt_stream_free(struct sst_byt *byt, struct sst_byt_stream *stream)
 434 {
 435         struct sst_ipc_message request = {0};
 436         int ret = 0;
 437         struct sst_dsp *sst = byt->dsp;
 438         unsigned long flags;
 439
 440         if (!stream->commited)
 441                 goto out;
 442
 443         request.header = sst_byt_header(IPC_IA_FREE_STREAM,
 444                         0, false, stream->str_id);
 445         ret = sst_ipc_tx_message_wait(&byt->ipc, request, NULL);
 446         if (ret < 0) {
 447                 dev_err(byt->dev, "ipc: free stream %d failed\n",
 448                         stream->str_id);
 449                 return -EAGAIN;
 450         }
 451
 452         stream->commited = false;
 453 out:
 454         spin_lock_irqsave(&sst->spinlock, flags);
 455         list_del(&stream->node);
 456         kfree(stream);
 457         spin_unlock_irqrestore(&sst->spinlock, flags);
 458
 459         return ret;
 460 }
 461
 462 static int sst_byt_stream_operations(struct sst_byt *byt, int type,
 463                                      int stream_id, int wait)
 464 {
 465         struct sst_ipc_message request = {0};
 466
 467         request.header = sst_byt_header(type, 0, false, stream_id);
 468         if (wait)
 469                 return sst_ipc_tx_message_wait(&byt->ipc, request, NULL);
 470         else
 471                 return sst_ipc_tx_message_nowait(&byt->ipc, request);
 472 }
 473
 474 /* stream ALSA trigger operations */
 475 int sst_byt_stream_start(struct sst_byt *byt, struct sst_byt_stream *stream,
 476                          u32 start_offset)
 477 {
 478         struct sst_byt_start_stream_params start_stream;
 479         struct sst_ipc_message request;
 480         int ret;
 481
 482         start_stream.byte_offset = start_offset;
 483         request.header = sst_byt_header(IPC_IA_START_STREAM,
 484                                 sizeof(start_stream) + sizeof(u32),
 485                                 true, stream->str_id);
 486         request.data = &start_stream;
 487         request.size = sizeof(start_stream);
 488
 489         ret = sst_ipc_tx_message_nowait(&byt->ipc, request);
 490         if (ret < 0)
 491                 dev_err(byt->dev, "ipc: error failed to start stream %d\n",
 492                         stream->str_id);
 493
 494         return ret;
 495 }
 496
 497 int sst_byt_stream_stop(struct sst_byt *byt, struct sst_byt_stream *stream)
 498 {
 499         int ret;
 500
 501         /* don't stop streams that are not commited */
 502         if (!stream->commited)
 503                 return 0;
 504
 505         ret = sst_byt_stream_operations(byt, IPC_IA_DROP_STREAM,
 506                                         stream->str_id, 0);
 507         if (ret < 0)
 508                 dev_err(byt->dev, "ipc: error failed to stop stream %d\n",
 509                         stream->str_id);
 510         return ret;
 511 }
 512
 513 int sst_byt_stream_pause(struct sst_byt *byt, struct sst_byt_stream *stream)
 514 {
 515         int ret;
 516
 517         ret = sst_byt_stream_operations(byt, IPC_IA_PAUSE_STREAM,
 518                                         stream->str_id, 0);
 519         if (ret < 0)
 520                 dev_err(byt->dev, "ipc: error failed to pause stream %d\n",
 521                         stream->str_id);
 522
 523         return ret;
 524 }
 525
 526 int sst_byt_stream_resume(struct sst_byt *byt, struct sst_byt_stream *stream)
 527 {
 528         int ret;
 529
 530         ret = sst_byt_stream_operations(byt, IPC_IA_RESUME_STREAM,
 531                                         stream->str_id, 0);
 532         if (ret < 0)
 533                 dev_err(byt->dev, "ipc: error failed to resume stream %d\n",
 534                         stream->str_id);
 535
 536         return ret;
 537 }
 538
 539 int sst_byt_get_dsp_position(struct sst_byt *byt,
 540                              struct sst_byt_stream *stream, int buffer_size)
 541 {
 542         struct sst_dsp *sst = byt->dsp;
 543         struct sst_byt_tstamp fw_tstamp;
 544         u8 str_id = stream->str_id;
 545         u32 tstamp_offset;
 546
 547         tstamp_offset = SST_BYT_TIMESTAMP_OFFSET + str_id * sizeof(fw_tstamp);
 548         memcpy_fromio(&fw_tstamp,
 549                       sst->addr.lpe + tstamp_offset, sizeof(fw_tstamp));
 550
 551         return do_div(fw_tstamp.ring_buffer_counter, buffer_size);
 552 }
 553
 554 struct sst_dsp *sst_byt_get_dsp(struct sst_byt *byt)
 555 {
 556         return byt->dsp;
 557 }
 558
 559 static struct sst_dsp_device byt_dev = {
 560         .thread = sst_byt_irq_thread,
 561         .ops = &sst_byt_ops,
 562 };
 563
 564 int sst_byt_dsp_suspend_late(struct device *dev, struct sst_pdata *pdata)
 565 {
 566         struct sst_byt *byt = pdata->dsp;
 567
 568         dev_dbg(byt->dev, "dsp reset\n");
 569         sst_dsp_reset(byt->dsp);
 570         sst_ipc_drop_all(&byt->ipc);
 571         dev_dbg(byt->dev, "dsp in reset\n");
 572
 573         dev_dbg(byt->dev, "free all blocks and unload fw\n");
 574         sst_fw_unload(byt->fw);
 575
 576         return 0;
 577 }
 578 EXPORT_SYMBOL_GPL(sst_byt_dsp_suspend_late);
 579
 580 int sst_byt_dsp_boot(struct device *dev, struct sst_pdata *pdata)
 581 {
 582         struct sst_byt *byt = pdata->dsp;
 583         int ret;
 584
 585         dev_dbg(byt->dev, "reload dsp fw\n");
 586
 587         sst_dsp_reset(byt->dsp);
 588
 589         ret = sst_fw_reload(byt->fw);
 590         if (ret <  0) {
 591                 dev_err(dev, "error: failed to reload firmware\n");
 592                 return ret;
 593         }
 594
 595         /* wait for DSP boot completion */
 596         byt->boot_complete = false;
 597         sst_dsp_boot(byt->dsp);
 598         dev_dbg(byt->dev, "dsp booting...\n");
 599
 600         return 0;
 601 }
 602 EXPORT_SYMBOL_GPL(sst_byt_dsp_boot);
 603
 604 int sst_byt_dsp_wait_for_ready(struct device *dev, struct sst_pdata *pdata)
 605 {
 606         struct sst_byt *byt = pdata->dsp;
 607         int err;
 608
 609         dev_dbg(byt->dev, "wait for dsp reboot\n");
 610
 611         err = wait_event_timeout(byt->boot_wait, byt->boot_complete,
 612                                  msecs_to_jiffies(IPC_BOOT_MSECS));
 613         if (err == 0) {
 614                 dev_err(byt->dev, "ipc: error DSP boot timeout\n");
 615                 return -EIO;
 616         }
 617
 618         dev_dbg(byt->dev, "dsp rebooted\n");
 619         return 0;
 620 }
 621 EXPORT_SYMBOL_GPL(sst_byt_dsp_wait_for_ready);
 622
 623 static void byt_tx_msg(struct sst_generic_ipc *ipc, struct ipc_message *msg)
 624 {
 625         if (msg->tx.header & IPC_HEADER_LARGE(true))
 626                 sst_dsp_outbox_write(ipc->dsp, msg->tx.data, msg->tx.size);
 627
 628         sst_dsp_shim_write64_unlocked(ipc->dsp, SST_IPCX, msg->tx.header);
 629 }
 630
 631 static void byt_shim_dbg(struct sst_generic_ipc *ipc, const char *text)
 632 {
 633         struct sst_dsp *sst = ipc->dsp;
 634         u64 isr, ipcd, imrx, ipcx;
 635
 636         ipcx = sst_dsp_shim_read64_unlocked(sst, SST_IPCX);
 637         isr = sst_dsp_shim_read64_unlocked(sst, SST_ISRX);
 638         ipcd = sst_dsp_shim_read64_unlocked(sst, SST_IPCD);
 639         imrx = sst_dsp_shim_read64_unlocked(sst, SST_IMRX);
 640
 641         dev_err(ipc->dev,
 642                 "ipc: --%s-- ipcx 0x%llx isr 0x%llx ipcd 0x%llx imrx 0x%llx\n",
 643                 text, ipcx, isr, ipcd, imrx);
 644 }
 645
 646 static void byt_tx_data_copy(struct ipc_message *msg, char *tx_data,
 647         size_t tx_size)
 648 {
 649         /* msg content = lower 32-bit of the header + data */
 650         *(u32 *)msg->tx.data = (u32)(msg->tx.header & (u32)-1);
 651         memcpy(msg->tx.data + sizeof(u32), tx_data, tx_size);
 652         msg->tx.size += sizeof(u32);
 653 }
 654
 655 static u64 byt_reply_msg_match(u64 header, u64 *mask)
 656 {
 657         /* match reply to message sent based on msg and stream IDs */
 658         *mask = IPC_HEADER_MSG_ID_MASK |
 659                IPC_HEADER_STR_ID_MASK << IPC_HEADER_STR_ID_SHIFT;
 660         header &= *mask;
 661
 662         return header;
 663 }
 664
 665 static bool byt_is_dsp_busy(struct sst_dsp *dsp)
 666 {
 667         u64 ipcx;
 668
 669         ipcx = sst_dsp_shim_read_unlocked(dsp, SST_IPCX);
 670         return (ipcx & (SST_IPCX_BUSY | SST_IPCX_DONE));
 671 }
 672
 673 int sst_byt_dsp_init(struct device *dev, struct sst_pdata *pdata)
 674 {
 675         struct sst_byt *byt;
 676         struct sst_generic_ipc *ipc;
 677         struct sst_fw *byt_sst_fw;
 678         struct sst_byt_fw_init init;
 679         int err;
 680
 681         dev_dbg(dev, "initialising Byt DSP IPC\n");
 682
 683         byt = devm_kzalloc(dev, sizeof(*byt), GFP_KERNEL);
 684         if (byt == NULL)
 685                 return -ENOMEM;
 686
 687         byt->dev = dev;
 688
 689         ipc = &byt->ipc;
 690         ipc->dev = dev;
 691         ipc->ops.tx_msg = byt_tx_msg;
 692         ipc->ops.shim_dbg = byt_shim_dbg;
 693         ipc->ops.tx_data_copy = byt_tx_data_copy;
 694         ipc->ops.reply_msg_match = byt_reply_msg_match;
 695         ipc->ops.is_dsp_busy = byt_is_dsp_busy;
 696         ipc->tx_data_max_size = IPC_MAX_MAILBOX_BYTES;
 697         ipc->rx_data_max_size = IPC_MAX_MAILBOX_BYTES;
 698
 699         err = sst_ipc_init(ipc);
 700         if (err != 0)
 701                 goto ipc_init_err;
 702
 703         INIT_LIST_HEAD(&byt->stream_list);
 704         init_waitqueue_head(&byt->boot_wait);
 705         byt_dev.thread_context = byt;
 706
 707         /* init SST shim */
 708         byt->dsp = sst_dsp_new(dev, &byt_dev, pdata);
 709         if (byt->dsp == NULL) {
 710                 err = -ENODEV;
 711                 goto dsp_new_err;
 712         }
 713
 714         ipc->dsp = byt->dsp;
 715
 716         /* keep the DSP in reset state for base FW loading */
 717         sst_dsp_reset(byt->dsp);
 718
 719         byt_sst_fw = sst_fw_new(byt->dsp, pdata->fw, byt);
 720         if (byt_sst_fw  == NULL) {
 721                 err = -ENODEV;
 722                 dev_err(dev, "error: failed to load firmware\n");
 723                 goto fw_err;
 724         }
 725
 726         /* wait for DSP boot completion */
 727         sst_dsp_boot(byt->dsp);
 728         err = wait_event_timeout(byt->boot_wait, byt->boot_complete,
 729                                  msecs_to_jiffies(IPC_BOOT_MSECS));
 730         if (err == 0) {
 731                 err = -EIO;
 732                 dev_err(byt->dev, "ipc: error DSP boot timeout\n");
 733                 goto boot_err;
 734         }
 735
 736         /* show firmware information */
 737         sst_dsp_inbox_read(byt->dsp, &init, sizeof(init));
 738         dev_info(byt->dev, "FW version: %02x.%02x.%02x.%02x\n",
 739                  init.fw_version.major, init.fw_version.minor,
 740                  init.fw_version.build, init.fw_version.type);
 741         dev_info(byt->dev, "Build type: %x\n", init.fw_version.type);
 742         dev_info(byt->dev, "Build date: %s %s\n",
 743                  init.build_info.date, init.build_info.time);
 744
 745         pdata->dsp = byt;
 746         byt->fw = byt_sst_fw;
 747
 748         return 0;
 749
 750 boot_err:
 751         sst_dsp_reset(byt->dsp);
 752         sst_fw_free(byt_sst_fw);
 753 fw_err:
 754         sst_dsp_free(byt->dsp);
 755 dsp_new_err:
 756         sst_ipc_fini(ipc);
 757 ipc_init_err:
 758
 759         return err;
 760 }
 761 EXPORT_SYMBOL_GPL(sst_byt_dsp_init);
 762
 763 void sst_byt_dsp_free(struct device *dev, struct sst_pdata *pdata)
 764 {
 765         struct sst_byt *byt = pdata->dsp;
 766
 767         sst_dsp_reset(byt->dsp);
 768         sst_fw_free_all(byt->dsp);
 769         sst_dsp_free(byt->dsp);
 770         sst_ipc_fini(&byt->ipc);
 771 }
 772 EXPORT_SYMBOL_GPL(sst_byt_dsp_free);