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

   1 /*
   2  * Intel Baytrail SST IPC Support
   3  * Copyright (c) 2014, Intel Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  */
  14
  15 #include <linux/types.h>
  16 #include <linux/kernel.h>
  17 #include <linux/list.h>
  18 #include <linux/device.h>
  19 #include <linux/wait.h>
  20 #include <linux/spinlock.h>
  21 #include <linux/workqueue.h>
  22 #include <linux/export.h>
  23 #include <linux/slab.h>
  24 #include <linux/delay.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/kthread.h>
  27 #include <linux/firmware.h>
  28 #include <linux/io.h>
  29 #include <asm/div64.h>
  30
  31 #include "sst-baytrail-ipc.h"
  32 #include "sst-dsp.h"
  33 #include "sst-dsp-priv.h"
  34
  35 /* IPC message timeout */
  36 #define IPC_TIMEOUT_MSECS       300
  37 #define IPC_BOOT_MSECS          200
  38
  39 #define IPC_EMPTY_LIST_SIZE     8
  40
  41 /* IPC header bits */
  42 #define IPC_HEADER_MSG_ID_MASK  0xff
  43 #define IPC_HEADER_MSG_ID(x)    ((x) & IPC_HEADER_MSG_ID_MASK)
  44 #define IPC_HEADER_STR_ID_SHIFT 8
  45 #define IPC_HEADER_STR_ID_MASK  0x1f
  46 #define IPC_HEADER_STR_ID(x)    (((x) & 0x1f) << IPC_HEADER_STR_ID_SHIFT)
  47 #define IPC_HEADER_LARGE_SHIFT  13
  48 #define IPC_HEADER_LARGE(x)     (((x) & 0x1) << IPC_HEADER_LARGE_SHIFT)
  49 #define IPC_HEADER_DATA_SHIFT   16
  50 #define IPC_HEADER_DATA_MASK    0x3fff
  51 #define IPC_HEADER_DATA(x)      (((x) & 0x3fff) << IPC_HEADER_DATA_SHIFT)
  52
  53 /* mask for differentiating between notification and reply message */
  54 #define IPC_NOTIFICATION        (0x1 << 7)
  55
  56 /* I2L Stream config/control msgs */
  57 #define IPC_IA_ALLOC_STREAM     0x20
  58 #define IPC_IA_FREE_STREAM      0x21
  59 #define IPC_IA_PAUSE_STREAM     0x24
  60 #define IPC_IA_RESUME_STREAM    0x25
  61 #define IPC_IA_DROP_STREAM      0x26
  62 #define IPC_IA_START_STREAM     0x30
  63
  64 /* notification messages */
  65 #define IPC_IA_FW_INIT_CMPLT    0x81
  66 #define IPC_SST_PERIOD_ELAPSED  0x97
  67
  68 /* IPC messages between host and ADSP */
  69 struct sst_byt_address_info {
  70         u32 addr;
  71         u32 size;
  72 } __packed;
  73
  74 struct sst_byt_str_type {
  75         u8 codec_type;
  76         u8 str_type;
  77         u8 operation;
  78         u8 protected_str;
  79         u8 time_slots;
  80         u8 reserved;
  81         u16 result;
  82 } __packed;
  83
  84 struct sst_byt_pcm_params {
  85         u8 num_chan;
  86         u8 pcm_wd_sz;
  87         u8 use_offload_path;
  88         u8 reserved;
  89         u32 sfreq;
  90         u8 channel_map[8];
  91 } __packed;
  92
  93 struct sst_byt_frames_info {
  94         u16 num_entries;
  95         u16 rsrvd;
  96         u32 frag_size;
  97         struct sst_byt_address_info ring_buf_info[8];
  98 } __packed;
  99
 100 struct sst_byt_alloc_params {
 101         struct sst_byt_str_type str_type;
 102         struct sst_byt_pcm_params pcm_params;
 103         struct sst_byt_frames_info frame_info;
 104 } __packed;
 105
 106 struct sst_byt_alloc_response {
 107         struct sst_byt_str_type str_type;
 108         u8 reserved[88];
 109 } __packed;
 110
 111 struct sst_byt_start_stream_params {
 112         u32 byte_offset;
 113 } __packed;
 114
 115 struct sst_byt_tstamp {
 116         u64 ring_buffer_counter;
 117         u64 hardware_counter;
 118         u64 frames_decoded;
 119         u64 bytes_decoded;
 120         u64 bytes_copied;
 121         u32 sampling_frequency;
 122         u32 channel_peak[8];
 123 } __packed;
 124
 125 struct sst_byt_fw_version {
 126         u8 build;
 127         u8 minor;
 128         u8 major;
 129         u8 type;
 130 } __packed;
 131
 132 struct sst_byt_fw_build_info {
 133         u8 date[16];
 134         u8 time[16];
 135 } __packed;
 136
 137 struct sst_byt_fw_init {
 138         struct sst_byt_fw_version fw_version;
 139         struct sst_byt_fw_build_info build_info;
 140         u16 result;
 141         u8 module_id;
 142         u8 debug_info;
 143 } __packed;
 144
 145 /* driver internal IPC message structure */
 146 struct ipc_message {
 147         struct list_head list;
 148         u64 header;
 149
 150         /* direction wrt host CPU */
 151         char tx_data[SST_BYT_IPC_MAX_PAYLOAD_SIZE];
 152         size_t tx_size;
 153         char rx_data[SST_BYT_IPC_MAX_PAYLOAD_SIZE];
 154         size_t rx_size;
 155
 156         wait_queue_head_t waitq;
 157         bool complete;
 158         bool wait;
 159         int errno;
 160 };
 161
 162 struct sst_byt_stream;
 163 struct sst_byt;
 164
 165 /* stream infomation */
 166 struct sst_byt_stream {
 167         struct list_head node;
 168
 169         /* configuration */
 170         struct sst_byt_alloc_params request;
 171         struct sst_byt_alloc_response reply;
 172
 173         /* runtime info */
 174         struct sst_byt *byt;
 175         int str_id;
 176         bool commited;
 177         bool running;
 178
 179         /* driver callback */
 180         u32 (*notify_position)(struct sst_byt_stream *stream, void *data);
 181         void *pdata;
 182 };
 183
 184 /* SST Baytrail IPC data */
 185 struct sst_byt {
 186         struct device *dev;
 187         struct sst_dsp *dsp;
 188
 189         /* stream */
 190         struct list_head stream_list;
 191
 192         /* boot */
 193         wait_queue_head_t boot_wait;
 194         bool boot_complete;
 195         struct sst_fw *fw;
 196
 197         /* IPC messaging */
 198         struct list_head tx_list;
 199         struct list_head rx_list;
 200         struct list_head empty_list;
 201         wait_queue_head_t wait_txq;
 202         struct task_struct *tx_thread;
 203         struct kthread_worker kworker;
 204         struct kthread_work kwork;
 205         struct ipc_message *msg;
 206 };
 207
 208 static inline u64 sst_byt_header(int msg_id, int data, bool large, int str_id)
 209 {
 210         u64 header;
 211
 212         header = IPC_HEADER_MSG_ID(msg_id) |
 213                  IPC_HEADER_STR_ID(str_id) |
 214                  IPC_HEADER_LARGE(large) |
 215                  IPC_HEADER_DATA(data) |
 216                  SST_BYT_IPCX_BUSY;
 217
 218         return header;
 219 }
 220
 221 static inline u16 sst_byt_header_msg_id(u64 header)
 222 {
 223         return header & IPC_HEADER_MSG_ID_MASK;
 224 }
 225
 226 static inline u8 sst_byt_header_str_id(u64 header)
 227 {
 228         return (header >> IPC_HEADER_STR_ID_SHIFT) & IPC_HEADER_STR_ID_MASK;
 229 }
 230
 231 static inline u16 sst_byt_header_data(u64 header)
 232 {
 233         return (header >> IPC_HEADER_DATA_SHIFT) & IPC_HEADER_DATA_MASK;
 234 }
 235
 236 static struct sst_byt_stream *sst_byt_get_stream(struct sst_byt *byt,
 237                                                  int stream_id)
 238 {
 239         struct sst_byt_stream *stream;
 240
 241         list_for_each_entry(stream, &byt->stream_list, node) {
 242                 if (stream->str_id == stream_id)
 243                         return stream;
 244         }
 245
 246         return NULL;
 247 }
 248
 249 static void sst_byt_ipc_shim_dbg(struct sst_byt *byt, const char *text)
 250 {
 251         struct sst_dsp *sst = byt->dsp;
 252         u64 isr, ipcd, imrx, ipcx;
 253
 254         ipcx = sst_dsp_shim_read64_unlocked(sst, SST_IPCX);
 255         isr = sst_dsp_shim_read64_unlocked(sst, SST_ISRX);
 256         ipcd = sst_dsp_shim_read64_unlocked(sst, SST_IPCD);
 257         imrx = sst_dsp_shim_read64_unlocked(sst, SST_IMRX);
 258
 259         dev_err(byt->dev,
 260                 "ipc: --%s-- ipcx 0x%llx isr 0x%llx ipcd 0x%llx imrx 0x%llx\n",
 261                 text, ipcx, isr, ipcd, imrx);
 262 }
 263
 264 /* locks held by caller */
 265 static struct ipc_message *sst_byt_msg_get_empty(struct sst_byt *byt)
 266 {
 267         struct ipc_message *msg = NULL;
 268
 269         if (!list_empty(&byt->empty_list)) {
 270                 msg = list_first_entry(&byt->empty_list,
 271                                        struct ipc_message, list);
 272                 list_del(&msg->list);
 273         }
 274
 275         return msg;
 276 }
 277
 278 static void sst_byt_ipc_tx_msgs(struct kthread_work *work)
 279 {
 280         struct sst_byt *byt =
 281                 container_of(work, struct sst_byt, kwork);
 282         struct ipc_message *msg;
 283         u64 ipcx;
 284         unsigned long flags;
 285
 286         spin_lock_irqsave(&byt->dsp->spinlock, flags);
 287         if (list_empty(&byt->tx_list)) {
 288                 spin_unlock_irqrestore(&byt->dsp->spinlock, flags);
 289                 return;
 290         }
 291
 292         /* if the DSP is busy we will TX messages after IRQ */
 293         ipcx = sst_dsp_shim_read64_unlocked(byt->dsp, SST_IPCX);
 294         if (ipcx & SST_BYT_IPCX_BUSY) {
 295                 spin_unlock_irqrestore(&byt->dsp->spinlock, flags);
 296                 return;
 297         }
 298
 299         msg = list_first_entry(&byt->tx_list, struct ipc_message, list);
 300
 301         list_move(&msg->list, &byt->rx_list);
 302
 303         /* send the message */
 304         if (msg->header & IPC_HEADER_LARGE(true))
 305                 sst_dsp_outbox_write(byt->dsp, msg->tx_data, msg->tx_size);
 306         sst_dsp_shim_write64_unlocked(byt->dsp, SST_IPCX, msg->header);
 307
 308         spin_unlock_irqrestore(&byt->dsp->spinlock, flags);
 309 }
 310
 311 static inline void sst_byt_tx_msg_reply_complete(struct sst_byt *byt,
 312                                                  struct ipc_message *msg)
 313 {
 314         msg->complete = true;
 315
 316         if (!msg->wait)
 317                 list_add_tail(&msg->list, &byt->empty_list);
 318         else
 319                 wake_up(&msg->waitq);
 320 }
 321
 322 static void sst_byt_drop_all(struct sst_byt *byt)
 323 {
 324         struct ipc_message *msg, *tmp;
 325         unsigned long flags;
 326
 327         /* drop all TX and Rx messages before we stall + reset DSP */
 328         spin_lock_irqsave(&byt->dsp->spinlock, flags);
 329         list_for_each_entry_safe(msg, tmp, &byt->tx_list, list) {
 330                 list_move(&msg->list, &byt->empty_list);
 331         }
 332
 333         list_for_each_entry_safe(msg, tmp, &byt->rx_list, list) {
 334                 list_move(&msg->list, &byt->empty_list);
 335         }
 336
 337         spin_unlock_irqrestore(&byt->dsp->spinlock, flags);
 338 }
 339
 340 static int sst_byt_tx_wait_done(struct sst_byt *byt, struct ipc_message *msg,
 341                                 void *rx_data)
 342 {
 343         unsigned long flags;
 344         int ret;
 345
 346         /* wait for DSP completion */
 347         ret = wait_event_timeout(msg->waitq, msg->complete,
 348                                  msecs_to_jiffies(IPC_TIMEOUT_MSECS));
 349
 350         spin_lock_irqsave(&byt->dsp->spinlock, flags);
 351         if (ret == 0) {
 352                 list_del(&msg->list);
 353                 sst_byt_ipc_shim_dbg(byt, "message timeout");
 354
 355                 ret = -ETIMEDOUT;
 356         } else {
 357
 358                 /* copy the data returned from DSP */
 359                 if (msg->rx_size)
 360                         memcpy(rx_data, msg->rx_data, msg->rx_size);
 361                 ret = msg->errno;
 362         }
 363
 364         list_add_tail(&msg->list, &byt->empty_list);
 365         spin_unlock_irqrestore(&byt->dsp->spinlock, flags);
 366         return ret;
 367 }
 368
 369 static int sst_byt_ipc_tx_message(struct sst_byt *byt, u64 header,
 370                                   void *tx_data, size_t tx_bytes,
 371                                   void *rx_data, size_t rx_bytes, int wait)
 372 {
 373         unsigned long flags;
 374         struct ipc_message *msg;
 375
 376         spin_lock_irqsave(&byt->dsp->spinlock, flags);
 377
 378         msg = sst_byt_msg_get_empty(byt);
 379         if (msg == NULL) {
 380                 spin_unlock_irqrestore(&byt->dsp->spinlock, flags);
 381                 return -EBUSY;
 382         }
 383
 384         msg->header = header;
 385         msg->tx_size = tx_bytes;
 386         msg->rx_size = rx_bytes;
 387         msg->wait = wait;
 388         msg->errno = 0;
 389         msg->complete = false;
 390
 391         if (tx_bytes) {
 392                 /* msg content = lower 32-bit of the header + data */
 393                 *(u32 *)msg->tx_data = (u32)(header & (u32)-1);
 394                 memcpy(msg->tx_data + sizeof(u32), tx_data, tx_bytes);
 395                 msg->tx_size += sizeof(u32);
 396         }
 397
 398         list_add_tail(&msg->list, &byt->tx_list);
 399         spin_unlock_irqrestore(&byt->dsp->spinlock, flags);
 400
 401         queue_kthread_work(&byt->kworker, &byt->kwork);
 402
 403         if (wait)
 404                 return sst_byt_tx_wait_done(byt, msg, rx_data);
 405         else
 406                 return 0;
 407 }
 408
 409 static inline int sst_byt_ipc_tx_msg_wait(struct sst_byt *byt, u64 header,
 410                                           void *tx_data, size_t tx_bytes,
 411                                           void *rx_data, size_t rx_bytes)
 412 {
 413         return sst_byt_ipc_tx_message(byt, header, tx_data, tx_bytes,
 414                                       rx_data, rx_bytes, 1);
 415 }
 416
 417 static inline int sst_byt_ipc_tx_msg_nowait(struct sst_byt *byt, u64 header,
 418                                                 void *tx_data, size_t tx_bytes)
 419 {
 420         return sst_byt_ipc_tx_message(byt, header, tx_data, tx_bytes,
 421                                       NULL, 0, 0);
 422 }
 423
 424 static struct ipc_message *sst_byt_reply_find_msg(struct sst_byt *byt,
 425                                                   u64 header)
 426 {
 427         struct ipc_message *msg = NULL, *_msg;
 428         u64 mask;
 429
 430         /* match reply to message sent based on msg and stream IDs */
 431         mask = IPC_HEADER_MSG_ID_MASK |
 432                IPC_HEADER_STR_ID_MASK << IPC_HEADER_STR_ID_SHIFT;
 433         header &= mask;
 434
 435         if (list_empty(&byt->rx_list)) {
 436                 dev_err(byt->dev,
 437                         "ipc: rx list is empty but received 0x%llx\n", header);
 438                 goto out;
 439         }
 440
 441         list_for_each_entry(_msg, &byt->rx_list, list) {
 442                 if ((_msg->header & mask) == header) {
 443                         msg = _msg;
 444                         break;
 445                 }
 446         }
 447
 448 out:
 449         return msg;
 450 }
 451
 452 static void sst_byt_stream_update(struct sst_byt *byt, struct ipc_message *msg)
 453 {
 454         struct sst_byt_stream *stream;
 455         u64 header = msg->header;
 456         u8 stream_id = sst_byt_header_str_id(header);
 457         u8 stream_msg = sst_byt_header_msg_id(header);
 458
 459         stream = sst_byt_get_stream(byt, stream_id);
 460         if (stream == NULL)
 461                 return;
 462
 463         switch (stream_msg) {
 464         case IPC_IA_DROP_STREAM:
 465         case IPC_IA_PAUSE_STREAM:
 466         case IPC_IA_FREE_STREAM:
 467                 stream->running = false;
 468                 break;
 469         case IPC_IA_START_STREAM:
 470         case IPC_IA_RESUME_STREAM:
 471                 stream->running = true;
 472                 break;
 473         }
 474 }
 475
 476 static int sst_byt_process_reply(struct sst_byt *byt, u64 header)
 477 {
 478         struct ipc_message *msg;
 479
 480         msg = sst_byt_reply_find_msg(byt, header);
 481         if (msg == NULL)
 482                 return 1;
 483
 484         if (header & IPC_HEADER_LARGE(true)) {
 485                 msg->rx_size = sst_byt_header_data(header);
 486                 sst_dsp_inbox_read(byt->dsp, msg->rx_data, msg->rx_size);
 487         }
 488
 489         /* update any stream states */
 490         sst_byt_stream_update(byt, msg);
 491
 492         list_del(&msg->list);
 493         /* wake up */
 494         sst_byt_tx_msg_reply_complete(byt, msg);
 495
 496         return 1;
 497 }
 498
 499 static void sst_byt_fw_ready(struct sst_byt *byt, u64 header)
 500 {
 501         dev_dbg(byt->dev, "ipc: DSP is ready 0x%llX\n", header);
 502
 503         byt->boot_complete = true;
 504         wake_up(&byt->boot_wait);
 505 }
 506
 507 static int sst_byt_process_notification(struct sst_byt *byt,
 508                                         unsigned long *flags)
 509 {
 510         struct sst_dsp *sst = byt->dsp;
 511         struct sst_byt_stream *stream;
 512         u64 header;
 513         u8 msg_id, stream_id;
 514         int handled = 1;
 515
 516         header = sst_dsp_shim_read64_unlocked(sst, SST_IPCD);
 517         msg_id = sst_byt_header_msg_id(header);
 518
 519         switch (msg_id) {
 520         case IPC_SST_PERIOD_ELAPSED:
 521                 stream_id = sst_byt_header_str_id(header);
 522                 stream = sst_byt_get_stream(byt, stream_id);
 523                 if (stream && stream->running && stream->notify_position) {
 524                         spin_unlock_irqrestore(&sst->spinlock, *flags);
 525                         stream->notify_position(stream, stream->pdata);
 526                         spin_lock_irqsave(&sst->spinlock, *flags);
 527                 }
 528                 break;
 529         case IPC_IA_FW_INIT_CMPLT:
 530                 sst_byt_fw_ready(byt, header);
 531                 break;
 532         }
 533
 534         return handled;
 535 }
 536
 537 static irqreturn_t sst_byt_irq_thread(int irq, void *context)
 538 {
 539         struct sst_dsp *sst = (struct sst_dsp *) context;
 540         struct sst_byt *byt = sst_dsp_get_thread_context(sst);
 541         u64 header;
 542         unsigned long flags;
 543
 544         spin_lock_irqsave(&sst->spinlock, flags);
 545
 546         header = sst_dsp_shim_read64_unlocked(sst, SST_IPCD);
 547         if (header & SST_BYT_IPCD_BUSY) {
 548                 if (header & IPC_NOTIFICATION) {
 549                         /* message from ADSP */
 550                         sst_byt_process_notification(byt, &flags);
 551                 } else {
 552                         /* reply from ADSP */
 553                         sst_byt_process_reply(byt, header);
 554                 }
 555                 /*
 556                  * clear IPCD BUSY bit and set DONE bit. Tell DSP we have
 557                  * processed the message and can accept new. Clear data part
 558                  * of the header
 559                  */
 560                 sst_dsp_shim_update_bits64_unlocked(sst, SST_IPCD,
 561                         SST_BYT_IPCD_DONE | SST_BYT_IPCD_BUSY |
 562                         IPC_HEADER_DATA(IPC_HEADER_DATA_MASK),
 563                         SST_BYT_IPCD_DONE);
 564                 /* unmask message request interrupts */
 565                 sst_dsp_shim_update_bits64_unlocked(sst, SST_IMRX,
 566                         SST_BYT_IMRX_REQUEST, 0);
 567         }
 568
 569         spin_unlock_irqrestore(&sst->spinlock, flags);
 570
 571         /* continue to send any remaining messages... */
 572         queue_kthread_work(&byt->kworker, &byt->kwork);
 573
 574         return IRQ_HANDLED;
 575 }
 576
 577 /* stream API */
 578 struct sst_byt_stream *sst_byt_stream_new(struct sst_byt *byt, int id,
 579         u32 (*notify_position)(struct sst_byt_stream *stream, void *data),
 580         void *data)
 581 {
 582         struct sst_byt_stream *stream;
 583         struct sst_dsp *sst = byt->dsp;
 584         unsigned long flags;
 585
 586         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 587         if (stream == NULL)
 588                 return NULL;
 589
 590         spin_lock_irqsave(&sst->spinlock, flags);
 591         list_add(&stream->node, &byt->stream_list);
 592         stream->notify_position = notify_position;
 593         stream->pdata = data;
 594         stream->byt = byt;
 595         stream->str_id = id;
 596         spin_unlock_irqrestore(&sst->spinlock, flags);
 597
 598         return stream;
 599 }
 600
 601 int sst_byt_stream_set_bits(struct sst_byt *byt, struct sst_byt_stream *stream,
 602                             int bits)
 603 {
 604         stream->request.pcm_params.pcm_wd_sz = bits;
 605         return 0;
 606 }
 607
 608 int sst_byt_stream_set_channels(struct sst_byt *byt,
 609                                 struct sst_byt_stream *stream, u8 channels)
 610 {
 611         stream->request.pcm_params.num_chan = channels;
 612         return 0;
 613 }
 614
 615 int sst_byt_stream_set_rate(struct sst_byt *byt, struct sst_byt_stream *stream,
 616                             unsigned int rate)
 617 {
 618         stream->request.pcm_params.sfreq = rate;
 619         return 0;
 620 }
 621
 622 /* stream sonfiguration */
 623 int sst_byt_stream_type(struct sst_byt *byt, struct sst_byt_stream *stream,
 624                         int codec_type, int stream_type, int operation)
 625 {
 626         stream->request.str_type.codec_type = codec_type;
 627         stream->request.str_type.str_type = stream_type;
 628         stream->request.str_type.operation = operation;
 629         stream->request.str_type.time_slots = 0xc;
 630
 631         return 0;
 632 }
 633
 634 int sst_byt_stream_buffer(struct sst_byt *byt, struct sst_byt_stream *stream,
 635                           uint32_t buffer_addr, uint32_t buffer_size)
 636 {
 637         stream->request.frame_info.num_entries = 1;
 638         stream->request.frame_info.ring_buf_info[0].addr = buffer_addr;
 639         stream->request.frame_info.ring_buf_info[0].size = buffer_size;
 640         /* calculate bytes per 4 ms fragment */
 641         stream->request.frame_info.frag_size =
 642                 stream->request.pcm_params.sfreq *
 643                 stream->request.pcm_params.num_chan *
 644                 stream->request.pcm_params.pcm_wd_sz / 8 *
 645                 4 / 1000;
 646         return 0;
 647 }
 648
 649 int sst_byt_stream_commit(struct sst_byt *byt, struct sst_byt_stream *stream)
 650 {
 651         struct sst_byt_alloc_params *str_req = &stream->request;
 652         struct sst_byt_alloc_response *reply = &stream->reply;
 653         u64 header;
 654         int ret;
 655
 656         header = sst_byt_header(IPC_IA_ALLOC_STREAM,
 657                                 sizeof(*str_req) + sizeof(u32),
 658                                 true, stream->str_id);
 659         ret = sst_byt_ipc_tx_msg_wait(byt, header, str_req, sizeof(*str_req),
 660                                       reply, sizeof(*reply));
 661         if (ret < 0) {
 662                 dev_err(byt->dev, "ipc: error stream commit failed\n");
 663                 return ret;
 664         }
 665
 666         stream->commited = true;
 667
 668         return 0;
 669 }
 670
 671 int sst_byt_stream_free(struct sst_byt *byt, struct sst_byt_stream *stream)
 672 {
 673         u64 header;
 674         int ret = 0;
 675         struct sst_dsp *sst = byt->dsp;
 676         unsigned long flags;
 677
 678         if (!stream->commited)
 679                 goto out;
 680
 681         header = sst_byt_header(IPC_IA_FREE_STREAM, 0, false, stream->str_id);
 682         ret = sst_byt_ipc_tx_msg_wait(byt, header, NULL, 0, NULL, 0);
 683         if (ret < 0) {
 684                 dev_err(byt->dev, "ipc: free stream %d failed\n",
 685                         stream->str_id);
 686                 return -EAGAIN;
 687         }
 688
 689         stream->commited = false;
 690 out:
 691         spin_lock_irqsave(&sst->spinlock, flags);
 692         list_del(&stream->node);
 693         kfree(stream);
 694         spin_unlock_irqrestore(&sst->spinlock, flags);
 695
 696         return ret;
 697 }
 698
 699 static int sst_byt_stream_operations(struct sst_byt *byt, int type,
 700                                      int stream_id, int wait)
 701 {
 702         u64 header;
 703
 704         header = sst_byt_header(type, 0, false, stream_id);
 705         if (wait)
 706                 return sst_byt_ipc_tx_msg_wait(byt, header, NULL, 0, NULL, 0);
 707         else
 708                 return sst_byt_ipc_tx_msg_nowait(byt, header, NULL, 0);
 709 }
 710
 711 /* stream ALSA trigger operations */
 712 int sst_byt_stream_start(struct sst_byt *byt, struct sst_byt_stream *stream,
 713                          u32 start_offset)
 714 {
 715         struct sst_byt_start_stream_params start_stream;
 716         void *tx_msg;
 717         size_t size;
 718         u64 header;
 719         int ret;
 720
 721         start_stream.byte_offset = start_offset;
 722         header = sst_byt_header(IPC_IA_START_STREAM,
 723                                 sizeof(start_stream) + sizeof(u32),
 724                                 true, stream->str_id);
 725         tx_msg = &start_stream;
 726         size = sizeof(start_stream);
 727
 728         ret = sst_byt_ipc_tx_msg_nowait(byt, header, tx_msg, size);
 729         if (ret < 0)
 730                 dev_err(byt->dev, "ipc: error failed to start stream %d\n",
 731                         stream->str_id);
 732
 733         return ret;
 734 }
 735
 736 int sst_byt_stream_stop(struct sst_byt *byt, struct sst_byt_stream *stream)
 737 {
 738         int ret;
 739
 740         /* don't stop streams that are not commited */
 741         if (!stream->commited)
 742                 return 0;
 743
 744         ret = sst_byt_stream_operations(byt, IPC_IA_DROP_STREAM,
 745                                         stream->str_id, 0);
 746         if (ret < 0)
 747                 dev_err(byt->dev, "ipc: error failed to stop stream %d\n",
 748                         stream->str_id);
 749         return ret;
 750 }
 751
 752 int sst_byt_stream_pause(struct sst_byt *byt, struct sst_byt_stream *stream)
 753 {
 754         int ret;
 755
 756         ret = sst_byt_stream_operations(byt, IPC_IA_PAUSE_STREAM,
 757                                         stream->str_id, 0);
 758         if (ret < 0)
 759                 dev_err(byt->dev, "ipc: error failed to pause stream %d\n",
 760                         stream->str_id);
 761
 762         return ret;
 763 }
 764
 765 int sst_byt_stream_resume(struct sst_byt *byt, struct sst_byt_stream *stream)
 766 {
 767         int ret;
 768
 769         ret = sst_byt_stream_operations(byt, IPC_IA_RESUME_STREAM,
 770                                         stream->str_id, 0);
 771         if (ret < 0)
 772                 dev_err(byt->dev, "ipc: error failed to resume stream %d\n",
 773                         stream->str_id);
 774
 775         return ret;
 776 }
 777
 778 int sst_byt_get_dsp_position(struct sst_byt *byt,
 779                              struct sst_byt_stream *stream, int buffer_size)
 780 {
 781         struct sst_dsp *sst = byt->dsp;
 782         struct sst_byt_tstamp fw_tstamp;
 783         u8 str_id = stream->str_id;
 784         u32 tstamp_offset;
 785
 786         tstamp_offset = SST_BYT_TIMESTAMP_OFFSET + str_id * sizeof(fw_tstamp);
 787         memcpy_fromio(&fw_tstamp,
 788                       sst->addr.lpe + tstamp_offset, sizeof(fw_tstamp));
 789
 790         return do_div(fw_tstamp.ring_buffer_counter, buffer_size);
 791 }
 792
 793 static int msg_empty_list_init(struct sst_byt *byt)
 794 {
 795         struct ipc_message *msg;
 796         int i;
 797
 798         byt->msg = kzalloc(sizeof(*msg) * IPC_EMPTY_LIST_SIZE, GFP_KERNEL);
 799         if (byt->msg == NULL)
 800                 return -ENOMEM;
 801
 802         for (i = 0; i < IPC_EMPTY_LIST_SIZE; i++) {
 803                 init_waitqueue_head(&byt->msg[i].waitq);
 804                 list_add(&byt->msg[i].list, &byt->empty_list);
 805         }
 806
 807         return 0;
 808 }
 809
 810 struct sst_dsp *sst_byt_get_dsp(struct sst_byt *byt)
 811 {
 812         return byt->dsp;
 813 }
 814
 815 static struct sst_dsp_device byt_dev = {
 816         .thread = sst_byt_irq_thread,
 817         .ops = &sst_byt_ops,
 818 };
 819
 820 int sst_byt_dsp_suspend_late(struct device *dev, struct sst_pdata *pdata)
 821 {
 822         struct sst_byt *byt = pdata->dsp;
 823
 824         dev_dbg(byt->dev, "dsp reset\n");
 825         sst_dsp_reset(byt->dsp);
 826         sst_byt_drop_all(byt);
 827         dev_dbg(byt->dev, "dsp in reset\n");
 828
 829         dev_dbg(byt->dev, "free all blocks and unload fw\n");
 830         sst_fw_unload(byt->fw);
 831
 832         return 0;
 833 }
 834 EXPORT_SYMBOL_GPL(sst_byt_dsp_suspend_late);
 835
 836 int sst_byt_dsp_boot(struct device *dev, struct sst_pdata *pdata)
 837 {
 838         struct sst_byt *byt = pdata->dsp;
 839         int ret;
 840
 841         dev_dbg(byt->dev, "reload dsp fw\n");
 842
 843         sst_dsp_reset(byt->dsp);
 844
 845         ret = sst_fw_reload(byt->fw);
 846         if (ret <  0) {
 847                 dev_err(dev, "error: failed to reload firmware\n");
 848                 return ret;
 849         }
 850
 851         /* wait for DSP boot completion */
 852         byt->boot_complete = false;
 853         sst_dsp_boot(byt->dsp);
 854         dev_dbg(byt->dev, "dsp booting...\n");
 855
 856         return 0;
 857 }
 858 EXPORT_SYMBOL_GPL(sst_byt_dsp_boot);
 859
 860 int sst_byt_dsp_wait_for_ready(struct device *dev, struct sst_pdata *pdata)
 861 {
 862         struct sst_byt *byt = pdata->dsp;
 863         int err;
 864
 865         dev_dbg(byt->dev, "wait for dsp reboot\n");
 866
 867         err = wait_event_timeout(byt->boot_wait, byt->boot_complete,
 868                                  msecs_to_jiffies(IPC_BOOT_MSECS));
 869         if (err == 0) {
 870                 dev_err(byt->dev, "ipc: error DSP boot timeout\n");
 871                 return -EIO;
 872         }
 873
 874         dev_dbg(byt->dev, "dsp rebooted\n");
 875         return 0;
 876 }
 877 EXPORT_SYMBOL_GPL(sst_byt_dsp_wait_for_ready);
 878
 879 int sst_byt_dsp_init(struct device *dev, struct sst_pdata *pdata)
 880 {
 881         struct sst_byt *byt;
 882         struct sst_fw *byt_sst_fw;
 883         struct sst_byt_fw_init init;
 884         int err;
 885
 886         dev_dbg(dev, "initialising Byt DSP IPC\n");
 887
 888         byt = devm_kzalloc(dev, sizeof(*byt), GFP_KERNEL);
 889         if (byt == NULL)
 890                 return -ENOMEM;
 891
 892         byt->dev = dev;
 893         INIT_LIST_HEAD(&byt->stream_list);
 894         INIT_LIST_HEAD(&byt->tx_list);
 895         INIT_LIST_HEAD(&byt->rx_list);
 896         INIT_LIST_HEAD(&byt->empty_list);
 897         init_waitqueue_head(&byt->boot_wait);
 898         init_waitqueue_head(&byt->wait_txq);
 899
 900         err = msg_empty_list_init(byt);
 901         if (err < 0)
 902                 return -ENOMEM;
 903
 904         /* start the IPC message thread */
 905         init_kthread_worker(&byt->kworker);
 906         byt->tx_thread = kthread_run(kthread_worker_fn,
 907                                      &byt->kworker, "%s",
 908                                      dev_name(byt->dev));
 909         if (IS_ERR(byt->tx_thread)) {
 910                 err = PTR_ERR(byt->tx_thread);
 911                 dev_err(byt->dev, "error failed to create message TX task\n");
 912                 goto err_free_msg;
 913         }
 914         init_kthread_work(&byt->kwork, sst_byt_ipc_tx_msgs);
 915
 916         byt_dev.thread_context = byt;
 917
 918         /* init SST shim */
 919         byt->dsp = sst_dsp_new(dev, &byt_dev, pdata);
 920         if (byt->dsp == NULL) {
 921                 err = -ENODEV;
 922                 goto dsp_err;
 923         }
 924
 925         /* keep the DSP in reset state for base FW loading */
 926         sst_dsp_reset(byt->dsp);
 927
 928         byt_sst_fw = sst_fw_new(byt->dsp, pdata->fw, byt);
 929         if (byt_sst_fw  == NULL) {
 930                 err = -ENODEV;
 931                 dev_err(dev, "error: failed to load firmware\n");
 932                 goto fw_err;
 933         }
 934
 935         /* wait for DSP boot completion */
 936         sst_dsp_boot(byt->dsp);
 937         err = wait_event_timeout(byt->boot_wait, byt->boot_complete,
 938                                  msecs_to_jiffies(IPC_BOOT_MSECS));
 939         if (err == 0) {
 940                 err = -EIO;
 941                 dev_err(byt->dev, "ipc: error DSP boot timeout\n");
 942                 goto boot_err;
 943         }
 944
 945         /* show firmware information */
 946         sst_dsp_inbox_read(byt->dsp, &init, sizeof(init));
 947         dev_info(byt->dev, "FW version: %02x.%02x.%02x.%02x\n",
 948                  init.fw_version.major, init.fw_version.minor,
 949                  init.fw_version.build, init.fw_version.type);
 950         dev_info(byt->dev, "Build type: %x\n", init.fw_version.type);
 951         dev_info(byt->dev, "Build date: %s %s\n",
 952                  init.build_info.date, init.build_info.time);
 953
 954         pdata->dsp = byt;
 955         byt->fw = byt_sst_fw;
 956
 957         return 0;
 958
 959 boot_err:
 960         sst_dsp_reset(byt->dsp);
 961         sst_fw_free(byt_sst_fw);
 962 fw_err:
 963         sst_dsp_free(byt->dsp);
 964 dsp_err:
 965         kthread_stop(byt->tx_thread);
 966 err_free_msg:
 967         kfree(byt->msg);
 968
 969         return err;
 970 }
 971 EXPORT_SYMBOL_GPL(sst_byt_dsp_init);
 972
 973 void sst_byt_dsp_free(struct device *dev, struct sst_pdata *pdata)
 974 {
 975         struct sst_byt *byt = pdata->dsp;
 976
 977         sst_dsp_reset(byt->dsp);
 978         sst_fw_free_all(byt->dsp);
 979         sst_dsp_free(byt->dsp);
 980         kthread_stop(byt->tx_thread);
 981         kfree(byt->msg);
 982 }
 983 EXPORT_SYMBOL_GPL(sst_byt_dsp_free);