sound/soc/intel/common/sst-dsp.c

   1 /*
   2  * Intel Smart Sound Technology (SST) DSP Core Driver
   3  *
   4  * Copyright (C) 2013, Intel Corporation. All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License version
   8  * 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  */
  16
  17 #include <linux/slab.h>
  18 #include <linux/export.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/module.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/io.h>
  23 #include <linux/delay.h>
  24
  25 #include "sst-dsp.h"
  26 #include "sst-dsp-priv.h"
  27
  28 #define CREATE_TRACE_POINTS
  29 #include <trace/events/intel-sst.h>
  30
  31 /* Internal generic low-level SST IO functions - can be overidden */
  32 void sst_shim32_write(void __iomem *addr, u32 offset, u32 value)
  33 {
  34         writel(value, addr + offset);
  35 }
  36 EXPORT_SYMBOL_GPL(sst_shim32_write);
  37
  38 u32 sst_shim32_read(void __iomem *addr, u32 offset)
  39 {
  40         return readl(addr + offset);
  41 }
  42 EXPORT_SYMBOL_GPL(sst_shim32_read);
  43
  44 void sst_shim32_write64(void __iomem *addr, u32 offset, u64 value)
  45 {
  46         memcpy_toio(addr + offset, &value, sizeof(value));
  47 }
  48 EXPORT_SYMBOL_GPL(sst_shim32_write64);
  49
  50 u64 sst_shim32_read64(void __iomem *addr, u32 offset)
  51 {
  52         u64 val;
  53
  54         memcpy_fromio(&val, addr + offset, sizeof(val));
  55         return val;
  56 }
  57 EXPORT_SYMBOL_GPL(sst_shim32_read64);
  58
  59 static inline void _sst_memcpy_toio_32(volatile u32 __iomem *dest,
  60         u32 *src, size_t bytes)
  61 {
  62         int i, words = bytes >> 2;
  63
  64         for (i = 0; i < words; i++)
  65                 writel(src[i], dest + i);
  66 }
  67
  68 static inline void _sst_memcpy_fromio_32(u32 *dest,
  69         const volatile __iomem u32 *src, size_t bytes)
  70 {
  71         int i, words = bytes >> 2;
  72
  73         for (i = 0; i < words; i++)
  74                 dest[i] = readl(src + i);
  75 }
  76
  77 void sst_memcpy_toio_32(struct sst_dsp *sst,
  78         void __iomem *dest, void *src, size_t bytes)
  79 {
  80         _sst_memcpy_toio_32(dest, src, bytes);
  81 }
  82 EXPORT_SYMBOL_GPL(sst_memcpy_toio_32);
  83
  84 void sst_memcpy_fromio_32(struct sst_dsp *sst, void *dest,
  85         void __iomem *src, size_t bytes)
  86 {
  87         _sst_memcpy_fromio_32(dest, src, bytes);
  88 }
  89 EXPORT_SYMBOL_GPL(sst_memcpy_fromio_32);
  90
  91 /* Public API */
  92 void sst_dsp_shim_write(struct sst_dsp *sst, u32 offset, u32 value)
  93 {
  94         unsigned long flags;
  95
  96         spin_lock_irqsave(&sst->spinlock, flags);
  97         sst->ops->write(sst->addr.shim, offset, value);
  98         spin_unlock_irqrestore(&sst->spinlock, flags);
  99 }
 100 EXPORT_SYMBOL_GPL(sst_dsp_shim_write);
 101
 102 u32 sst_dsp_shim_read(struct sst_dsp *sst, u32 offset)
 103 {
 104         unsigned long flags;
 105         u32 val;
 106
 107         spin_lock_irqsave(&sst->spinlock, flags);
 108         val = sst->ops->read(sst->addr.shim, offset);
 109         spin_unlock_irqrestore(&sst->spinlock, flags);
 110
 111         return val;
 112 }
 113 EXPORT_SYMBOL_GPL(sst_dsp_shim_read);
 114
 115 void sst_dsp_shim_write64(struct sst_dsp *sst, u32 offset, u64 value)
 116 {
 117         unsigned long flags;
 118
 119         spin_lock_irqsave(&sst->spinlock, flags);
 120         sst->ops->write64(sst->addr.shim, offset, value);
 121         spin_unlock_irqrestore(&sst->spinlock, flags);
 122 }
 123 EXPORT_SYMBOL_GPL(sst_dsp_shim_write64);
 124
 125 u64 sst_dsp_shim_read64(struct sst_dsp *sst, u32 offset)
 126 {
 127         unsigned long flags;
 128         u64 val;
 129
 130         spin_lock_irqsave(&sst->spinlock, flags);
 131         val = sst->ops->read64(sst->addr.shim, offset);
 132         spin_unlock_irqrestore(&sst->spinlock, flags);
 133
 134         return val;
 135 }
 136 EXPORT_SYMBOL_GPL(sst_dsp_shim_read64);
 137
 138 void sst_dsp_shim_write_unlocked(struct sst_dsp *sst, u32 offset, u32 value)
 139 {
 140         sst->ops->write(sst->addr.shim, offset, value);
 141 }
 142 EXPORT_SYMBOL_GPL(sst_dsp_shim_write_unlocked);
 143
 144 u32 sst_dsp_shim_read_unlocked(struct sst_dsp *sst, u32 offset)
 145 {
 146         return sst->ops->read(sst->addr.shim, offset);
 147 }
 148 EXPORT_SYMBOL_GPL(sst_dsp_shim_read_unlocked);
 149
 150 void sst_dsp_shim_write64_unlocked(struct sst_dsp *sst, u32 offset, u64 value)
 151 {
 152         sst->ops->write64(sst->addr.shim, offset, value);
 153 }
 154 EXPORT_SYMBOL_GPL(sst_dsp_shim_write64_unlocked);
 155
 156 u64 sst_dsp_shim_read64_unlocked(struct sst_dsp *sst, u32 offset)
 157 {
 158         return sst->ops->read64(sst->addr.shim, offset);
 159 }
 160 EXPORT_SYMBOL_GPL(sst_dsp_shim_read64_unlocked);
 161
 162 int sst_dsp_shim_update_bits_unlocked(struct sst_dsp *sst, u32 offset,
 163                                 u32 mask, u32 value)
 164 {
 165         bool change;
 166         unsigned int old, new;
 167         u32 ret;
 168
 169         ret = sst_dsp_shim_read_unlocked(sst, offset);
 170
 171         old = ret;
 172         new = (old & (~mask)) | (value & mask);
 173
 174         change = (old != new);
 175         if (change)
 176                 sst_dsp_shim_write_unlocked(sst, offset, new);
 177
 178         return change;
 179 }
 180 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits_unlocked);
 181
 182 int sst_dsp_shim_update_bits64_unlocked(struct sst_dsp *sst, u32 offset,
 183                                 u64 mask, u64 value)
 184 {
 185         bool change;
 186         u64 old, new;
 187
 188         old = sst_dsp_shim_read64_unlocked(sst, offset);
 189
 190         new = (old & (~mask)) | (value & mask);
 191
 192         change = (old != new);
 193         if (change)
 194                 sst_dsp_shim_write64_unlocked(sst, offset, new);
 195
 196         return change;
 197 }
 198 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits64_unlocked);
 199
 200 /* This is for registers bits with attribute RWC */
 201 void sst_dsp_shim_update_bits_forced_unlocked(struct sst_dsp *sst, u32 offset,
 202                                 u32 mask, u32 value)
 203 {
 204         unsigned int old, new;
 205         u32 ret;
 206
 207         ret = sst_dsp_shim_read_unlocked(sst, offset);
 208
 209         old = ret;
 210         new = (old & (~mask)) | (value & mask);
 211
 212         sst_dsp_shim_write_unlocked(sst, offset, new);
 213 }
 214 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits_forced_unlocked);
 215
 216 int sst_dsp_shim_update_bits(struct sst_dsp *sst, u32 offset,
 217                                 u32 mask, u32 value)
 218 {
 219         unsigned long flags;
 220         bool change;
 221
 222         spin_lock_irqsave(&sst->spinlock, flags);
 223         change = sst_dsp_shim_update_bits_unlocked(sst, offset, mask, value);
 224         spin_unlock_irqrestore(&sst->spinlock, flags);
 225         return change;
 226 }
 227 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits);
 228
 229 int sst_dsp_shim_update_bits64(struct sst_dsp *sst, u32 offset,
 230                                 u64 mask, u64 value)
 231 {
 232         unsigned long flags;
 233         bool change;
 234
 235         spin_lock_irqsave(&sst->spinlock, flags);
 236         change = sst_dsp_shim_update_bits64_unlocked(sst, offset, mask, value);
 237         spin_unlock_irqrestore(&sst->spinlock, flags);
 238         return change;
 239 }
 240 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits64);
 241
 242 /* This is for registers bits with attribute RWC */
 243 void sst_dsp_shim_update_bits_forced(struct sst_dsp *sst, u32 offset,
 244                                 u32 mask, u32 value)
 245 {
 246         unsigned long flags;
 247
 248         spin_lock_irqsave(&sst->spinlock, flags);
 249         sst_dsp_shim_update_bits_forced_unlocked(sst, offset, mask, value);
 250         spin_unlock_irqrestore(&sst->spinlock, flags);
 251 }
 252 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits_forced);
 253
 254 int sst_dsp_register_poll(struct sst_dsp *ctx, u32 offset, u32 mask,
 255                          u32 target, u32 time, char *operation)
 256 {
 257         u32 reg;
 258         unsigned long timeout;
 259         int k = 0, s = 500;
 260
 261         /*
 262          * split the loop into sleeps of varying resolution. more accurately,
 263          * the range of wakeups are:
 264          * Phase 1(first 5ms): min sleep 0.5ms; max sleep 1ms.
 265          * Phase 2:( 5ms to 10ms) : min sleep 0.5ms; max sleep 10ms
 266          * (usleep_range (500, 1000) and usleep_range(5000, 10000) are
 267          * both possible in this phase depending on whether k > 10 or not).
 268          * Phase 3: (beyond 10 ms) min sleep 5ms; max sleep 10ms.
 269          */
 270
 271         timeout = jiffies + msecs_to_jiffies(time);
 272         while ((((reg = sst_dsp_shim_read_unlocked(ctx, offset)) & mask) != target)
 273                 && time_before(jiffies, timeout)) {
 274                 k++;
 275                 if (k > 10)
 276                         s = 5000;
 277
 278                 usleep_range(s, 2*s);
 279         }
 280
 281         if ((reg & mask) == target) {
 282                 dev_dbg(ctx->dev, "FW Poll Status: reg=%#x %s successful\n",
 283                                         reg, operation);
 284
 285                 return 0;
 286         }
 287
 288         dev_dbg(ctx->dev, "FW Poll Status: reg=%#x %s timedout\n",
 289                                         reg, operation);
 290         return -ETIME;
 291 }
 292 EXPORT_SYMBOL_GPL(sst_dsp_register_poll);
 293
 294 void sst_dsp_dump(struct sst_dsp *sst)
 295 {
 296         if (sst->ops->dump)
 297                 sst->ops->dump(sst);
 298 }
 299 EXPORT_SYMBOL_GPL(sst_dsp_dump);
 300
 301 void sst_dsp_reset(struct sst_dsp *sst)
 302 {
 303         if (sst->ops->reset)
 304                 sst->ops->reset(sst);
 305 }
 306 EXPORT_SYMBOL_GPL(sst_dsp_reset);
 307
 308 int sst_dsp_boot(struct sst_dsp *sst)
 309 {
 310         if (sst->ops->boot)
 311                 sst->ops->boot(sst);
 312
 313         return 0;
 314 }
 315 EXPORT_SYMBOL_GPL(sst_dsp_boot);
 316
 317 int sst_dsp_wake(struct sst_dsp *sst)
 318 {
 319         if (sst->ops->wake)
 320                 return sst->ops->wake(sst);
 321
 322         return 0;
 323 }
 324 EXPORT_SYMBOL_GPL(sst_dsp_wake);
 325
 326 void sst_dsp_sleep(struct sst_dsp *sst)
 327 {
 328         if (sst->ops->sleep)
 329                 sst->ops->sleep(sst);
 330 }
 331 EXPORT_SYMBOL_GPL(sst_dsp_sleep);
 332
 333 void sst_dsp_stall(struct sst_dsp *sst)
 334 {
 335         if (sst->ops->stall)
 336                 sst->ops->stall(sst);
 337 }
 338 EXPORT_SYMBOL_GPL(sst_dsp_stall);
 339
 340 void sst_dsp_ipc_msg_tx(struct sst_dsp *dsp, u32 msg)
 341 {
 342         sst_dsp_shim_write_unlocked(dsp, SST_IPCX, msg | SST_IPCX_BUSY);
 343         trace_sst_ipc_msg_tx(msg);
 344 }
 345 EXPORT_SYMBOL_GPL(sst_dsp_ipc_msg_tx);
 346
 347 u32 sst_dsp_ipc_msg_rx(struct sst_dsp *dsp)
 348 {
 349         u32 msg;
 350
 351         msg = sst_dsp_shim_read_unlocked(dsp, SST_IPCX);
 352         trace_sst_ipc_msg_rx(msg);
 353
 354         return msg;
 355 }
 356 EXPORT_SYMBOL_GPL(sst_dsp_ipc_msg_rx);
 357
 358 int sst_dsp_mailbox_init(struct sst_dsp *sst, u32 inbox_offset, size_t inbox_size,
 359         u32 outbox_offset, size_t outbox_size)
 360 {
 361         sst->mailbox.in_base = sst->addr.lpe + inbox_offset;
 362         sst->mailbox.out_base = sst->addr.lpe + outbox_offset;
 363         sst->mailbox.in_size = inbox_size;
 364         sst->mailbox.out_size = outbox_size;
 365         return 0;
 366 }
 367 EXPORT_SYMBOL_GPL(sst_dsp_mailbox_init);
 368
 369 void sst_dsp_outbox_write(struct sst_dsp *sst, void *message, size_t bytes)
 370 {
 371         u32 i;
 372
 373         trace_sst_ipc_outbox_write(bytes);
 374
 375         memcpy_toio(sst->mailbox.out_base, message, bytes);
 376
 377         for (i = 0; i < bytes; i += 4)
 378                 trace_sst_ipc_outbox_wdata(i, *(u32 *)(message + i));
 379 }
 380 EXPORT_SYMBOL_GPL(sst_dsp_outbox_write);
 381
 382 void sst_dsp_outbox_read(struct sst_dsp *sst, void *message, size_t bytes)
 383 {
 384         u32 i;
 385
 386         trace_sst_ipc_outbox_read(bytes);
 387
 388         memcpy_fromio(message, sst->mailbox.out_base, bytes);
 389
 390         for (i = 0; i < bytes; i += 4)
 391                 trace_sst_ipc_outbox_rdata(i, *(u32 *)(message + i));
 392 }
 393 EXPORT_SYMBOL_GPL(sst_dsp_outbox_read);
 394
 395 void sst_dsp_inbox_write(struct sst_dsp *sst, void *message, size_t bytes)
 396 {
 397         u32 i;
 398
 399         trace_sst_ipc_inbox_write(bytes);
 400
 401         memcpy_toio(sst->mailbox.in_base, message, bytes);
 402
 403         for (i = 0; i < bytes; i += 4)
 404                 trace_sst_ipc_inbox_wdata(i, *(u32 *)(message + i));
 405 }
 406 EXPORT_SYMBOL_GPL(sst_dsp_inbox_write);
 407
 408 void sst_dsp_inbox_read(struct sst_dsp *sst, void *message, size_t bytes)
 409 {
 410         u32 i;
 411
 412         trace_sst_ipc_inbox_read(bytes);
 413
 414         memcpy_fromio(message, sst->mailbox.in_base, bytes);
 415
 416         for (i = 0; i < bytes; i += 4)
 417                 trace_sst_ipc_inbox_rdata(i, *(u32 *)(message + i));
 418 }
 419 EXPORT_SYMBOL_GPL(sst_dsp_inbox_read);
 420
 421 /* Module information */
 422 MODULE_AUTHOR("Liam Girdwood");
 423 MODULE_DESCRIPTION("Intel SST Core");
 424 MODULE_LICENSE("GPL v2");