sound/soc/intel/skylake/skl.c

   1 /*
   2  *  skl.c - Implementation of ASoC Intel SKL HD Audio driver
   3  *
   4  *  Copyright (C) 2014-2015 Intel Corp
   5  *  Author: Jeeja KP <jeeja.kp@intel.com>
   6  *
   7  *  Derived mostly from Intel HDA driver with following copyrights:
   8  *  Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
   9  *                     PeiSen Hou <pshou@realtek.com.tw>
  10  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; version 2 of the License.
  15  *
  16  *  This program is distributed in the hope that it will be useful, but
  17  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  *  General Public License for more details.
  20  *
  21  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/pci.h>
  26 #include <linux/pm_runtime.h>
  27 #include <linux/platform_device.h>
  28 #include <linux/firmware.h>
  29 #include <sound/pcm.h>
  30 #include "skl.h"
  31
  32 /*
  33  * initialize the PCI registers
  34  */
  35 static void skl_update_pci_byte(struct pci_dev *pci, unsigned int reg,
  36                             unsigned char mask, unsigned char val)
  37 {
  38         unsigned char data;
  39
  40         pci_read_config_byte(pci, reg, &data);
  41         data &= ~mask;
  42         data |= (val & mask);
  43         pci_write_config_byte(pci, reg, data);
  44 }
  45
  46 static void skl_init_pci(struct skl *skl)
  47 {
  48         struct hdac_ext_bus *ebus = &skl->ebus;
  49
  50         /*
  51          * Clear bits 0-2 of PCI register TCSEL (at offset 0x44)
  52          * TCSEL == Traffic Class Select Register, which sets PCI express QOS
  53          * Ensuring these bits are 0 clears playback static on some HD Audio
  54          * codecs.
  55          * The PCI register TCSEL is defined in the Intel manuals.
  56          */
  57         dev_dbg(ebus_to_hbus(ebus)->dev, "Clearing TCSEL\n");
  58         skl_update_pci_byte(skl->pci, AZX_PCIREG_TCSEL, 0x07, 0);
  59 }
  60
  61 /* called from IRQ */
  62 static void skl_stream_update(struct hdac_bus *bus, struct hdac_stream *hstr)
  63 {
  64         snd_pcm_period_elapsed(hstr->substream);
  65 }
  66
  67 static irqreturn_t skl_interrupt(int irq, void *dev_id)
  68 {
  69         struct hdac_ext_bus *ebus = dev_id;
  70         struct hdac_bus *bus = ebus_to_hbus(ebus);
  71         u32 status;
  72
  73         if (!pm_runtime_active(bus->dev))
  74                 return IRQ_NONE;
  75
  76         spin_lock(&bus->reg_lock);
  77
  78         status = snd_hdac_chip_readl(bus, INTSTS);
  79         if (status == 0 || status == 0xffffffff) {
  80                 spin_unlock(&bus->reg_lock);
  81                 return IRQ_NONE;
  82         }
  83
  84         /* clear rirb int */
  85         status = snd_hdac_chip_readb(bus, RIRBSTS);
  86         if (status & RIRB_INT_MASK) {
  87                 if (status & RIRB_INT_RESPONSE)
  88                         snd_hdac_bus_update_rirb(bus);
  89                 snd_hdac_chip_writeb(bus, RIRBSTS, RIRB_INT_MASK);
  90         }
  91
  92         spin_unlock(&bus->reg_lock);
  93
  94         return snd_hdac_chip_readl(bus, INTSTS) ? IRQ_WAKE_THREAD : IRQ_HANDLED;
  95 }
  96
  97 static irqreturn_t skl_threaded_handler(int irq, void *dev_id)
  98 {
  99         struct hdac_ext_bus *ebus = dev_id;
 100         struct hdac_bus *bus = ebus_to_hbus(ebus);
 101         u32 status;
 102
 103         status = snd_hdac_chip_readl(bus, INTSTS);
 104
 105         snd_hdac_bus_handle_stream_irq(bus, status, skl_stream_update);
 106
 107         return IRQ_HANDLED;
 108 }
 109
 110 static int skl_acquire_irq(struct hdac_ext_bus *ebus, int do_disconnect)
 111 {
 112         struct skl *skl = ebus_to_skl(ebus);
 113         struct hdac_bus *bus = ebus_to_hbus(ebus);
 114         int ret;
 115
 116         ret = request_threaded_irq(skl->pci->irq, skl_interrupt,
 117                         skl_threaded_handler,
 118                         IRQF_SHARED,
 119                         KBUILD_MODNAME, ebus);
 120         if (ret) {
 121                 dev_err(bus->dev,
 122                         "unable to grab IRQ %d, disabling device\n",
 123                         skl->pci->irq);
 124                 return ret;
 125         }
 126
 127         bus->irq = skl->pci->irq;
 128         pci_intx(skl->pci, 1);
 129
 130         return 0;
 131 }
 132
 133 #ifdef CONFIG_PM_SLEEP
 134 /*
 135  * power management
 136  */
 137 static int skl_suspend(struct device *dev)
 138 {
 139         struct pci_dev *pci = to_pci_dev(dev);
 140         struct hdac_ext_bus *ebus = pci_get_drvdata(pci);
 141         struct hdac_bus *bus = ebus_to_hbus(ebus);
 142
 143         snd_hdac_bus_stop_chip(bus);
 144         snd_hdac_bus_enter_link_reset(bus);
 145
 146         return 0;
 147 }
 148
 149 static int skl_resume(struct device *dev)
 150 {
 151         struct pci_dev *pci = to_pci_dev(dev);
 152         struct hdac_ext_bus *ebus = pci_get_drvdata(pci);
 153         struct hdac_bus *bus = ebus_to_hbus(ebus);
 154         struct skl *hda = ebus_to_skl(ebus);
 155
 156         skl_init_pci(hda);
 157
 158         snd_hdac_bus_init_chip(bus, 1);
 159
 160         return 0;
 161 }
 162 #endif /* CONFIG_PM_SLEEP */
 163
 164 #ifdef CONFIG_PM
 165 static int skl_runtime_suspend(struct device *dev)
 166 {
 167         struct pci_dev *pci = to_pci_dev(dev);
 168         struct hdac_ext_bus *ebus = pci_get_drvdata(pci);
 169         struct hdac_bus *bus = ebus_to_hbus(ebus);
 170         struct skl *skl = ebus_to_skl(ebus);
 171         int ret;
 172
 173         dev_dbg(bus->dev, "in %s\n", __func__);
 174
 175         /* enable controller wake up event */
 176         snd_hdac_chip_updatew(bus, WAKEEN, 0, STATESTS_INT_MASK);
 177
 178         snd_hdac_ext_bus_link_power_down_all(ebus);
 179
 180         ret = skl_suspend_dsp(skl);
 181         if (ret < 0)
 182                 return ret;
 183
 184         snd_hdac_bus_stop_chip(bus);
 185         snd_hdac_bus_enter_link_reset(bus);
 186
 187         return 0;
 188 }
 189
 190 static int skl_runtime_resume(struct device *dev)
 191 {
 192         struct pci_dev *pci = to_pci_dev(dev);
 193         struct hdac_ext_bus *ebus = pci_get_drvdata(pci);
 194         struct hdac_bus *bus = ebus_to_hbus(ebus);
 195         struct skl *skl = ebus_to_skl(ebus);
 196         int status;
 197
 198         dev_dbg(bus->dev, "in %s\n", __func__);
 199
 200         /* Read STATESTS before controller reset */
 201         status = snd_hdac_chip_readw(bus, STATESTS);
 202
 203         skl_init_pci(skl);
 204         snd_hdac_bus_init_chip(bus, true);
 205         /* disable controller Wake Up event */
 206         snd_hdac_chip_updatew(bus, WAKEEN, STATESTS_INT_MASK, 0);
 207
 208         return skl_resume_dsp(skl);
 209 }
 210 #endif /* CONFIG_PM */
 211
 212 static const struct dev_pm_ops skl_pm = {
 213         SET_SYSTEM_SLEEP_PM_OPS(skl_suspend, skl_resume)
 214         SET_RUNTIME_PM_OPS(skl_runtime_suspend, skl_runtime_resume, NULL)
 215 };
 216
 217 /*
 218  * destructor
 219  */
 220 static int skl_free(struct hdac_ext_bus *ebus)
 221 {
 222         struct skl *skl  = ebus_to_skl(ebus);
 223         struct hdac_bus *bus = ebus_to_hbus(ebus);
 224
 225         skl->init_failed = 1; /* to be sure */
 226
 227         snd_hdac_ext_stop_streams(ebus);
 228
 229         if (bus->irq >= 0)
 230                 free_irq(bus->irq, (void *)bus);
 231         if (bus->remap_addr)
 232                 iounmap(bus->remap_addr);
 233
 234         snd_hdac_bus_free_stream_pages(bus);
 235         snd_hdac_stream_free_all(ebus);
 236         snd_hdac_link_free_all(ebus);
 237         pci_release_regions(skl->pci);
 238         pci_disable_device(skl->pci);
 239
 240         snd_hdac_ext_bus_exit(ebus);
 241
 242         return 0;
 243 }
 244
 245 static int skl_dmic_device_register(struct skl *skl)
 246 {
 247         struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
 248         struct platform_device *pdev;
 249         int ret;
 250
 251         /* SKL has one dmic port, so allocate dmic device for this */
 252         pdev = platform_device_alloc("dmic-codec", -1);
 253         if (!pdev) {
 254                 dev_err(bus->dev, "failed to allocate dmic device\n");
 255                 return -ENOMEM;
 256         }
 257
 258         ret = platform_device_add(pdev);
 259         if (ret) {
 260                 dev_err(bus->dev, "failed to add dmic device: %d\n", ret);
 261                 platform_device_put(pdev);
 262                 return ret;
 263         }
 264         skl->dmic_dev = pdev;
 265
 266         return 0;
 267 }
 268
 269 static void skl_dmic_device_unregister(struct skl *skl)
 270 {
 271         if (skl->dmic_dev)
 272                 platform_device_unregister(skl->dmic_dev);
 273 }
 274
 275 /*
 276  * Probe the given codec address
 277  */
 278 static int probe_codec(struct hdac_ext_bus *ebus, int addr)
 279 {
 280         struct hdac_bus *bus = ebus_to_hbus(ebus);
 281         unsigned int cmd = (addr << 28) | (AC_NODE_ROOT << 20) |
 282                 (AC_VERB_PARAMETERS << 8) | AC_PAR_VENDOR_ID;
 283         unsigned int res;
 284
 285         mutex_lock(&bus->cmd_mutex);
 286         snd_hdac_bus_send_cmd(bus, cmd);
 287         snd_hdac_bus_get_response(bus, addr, &res);
 288         mutex_unlock(&bus->cmd_mutex);
 289         if (res == -1)
 290                 return -EIO;
 291         dev_dbg(bus->dev, "codec #%d probed OK\n", addr);
 292
 293         return snd_hdac_ext_bus_device_init(ebus, addr);
 294 }
 295
 296 /* Codec initialization */
 297 static int skl_codec_create(struct hdac_ext_bus *ebus)
 298 {
 299         struct hdac_bus *bus = ebus_to_hbus(ebus);
 300         int c, max_slots;
 301
 302         max_slots = HDA_MAX_CODECS;
 303
 304         /* First try to probe all given codec slots */
 305         for (c = 0; c < max_slots; c++) {
 306                 if ((bus->codec_mask & (1 << c))) {
 307                         if (probe_codec(ebus, c) < 0) {
 308                                 /*
 309                                  * Some BIOSen give you wrong codec addresses
 310                                  * that don't exist
 311                                  */
 312                                 dev_warn(bus->dev,
 313                                          "Codec #%d probe error; disabling it...\n", c);
 314                                 bus->codec_mask &= ~(1 << c);
 315                                 /*
 316                                  * More badly, accessing to a non-existing
 317                                  * codec often screws up the controller bus,
 318                                  * and disturbs the further communications.
 319                                  * Thus if an error occurs during probing,
 320                                  * better to reset the controller bus to get
 321                                  * back to the sanity state.
 322                                  */
 323                                 snd_hdac_bus_stop_chip(bus);
 324                                 snd_hdac_bus_init_chip(bus, true);
 325                         }
 326                 }
 327         }
 328
 329         return 0;
 330 }
 331
 332 static const struct hdac_bus_ops bus_core_ops = {
 333         .command = snd_hdac_bus_send_cmd,
 334         .get_response = snd_hdac_bus_get_response,
 335 };
 336
 337 /*
 338  * constructor
 339  */
 340 static int skl_create(struct pci_dev *pci,
 341                       const struct hdac_io_ops *io_ops,
 342                       struct skl **rskl)
 343 {
 344         struct skl *skl;
 345         struct hdac_ext_bus *ebus;
 346
 347         int err;
 348
 349         *rskl = NULL;
 350
 351         err = pci_enable_device(pci);
 352         if (err < 0)
 353                 return err;
 354
 355         skl = devm_kzalloc(&pci->dev, sizeof(*skl), GFP_KERNEL);
 356         if (!skl) {
 357                 pci_disable_device(pci);
 358                 return -ENOMEM;
 359         }
 360         ebus = &skl->ebus;
 361         snd_hdac_ext_bus_init(ebus, &pci->dev, &bus_core_ops, io_ops);
 362         ebus->bus.use_posbuf = 1;
 363         skl->pci = pci;
 364
 365         ebus->bus.bdl_pos_adj = 0;
 366
 367         *rskl = skl;
 368
 369         return 0;
 370 }
 371
 372 static int skl_first_init(struct hdac_ext_bus *ebus)
 373 {
 374         struct skl *skl = ebus_to_skl(ebus);
 375         struct hdac_bus *bus = ebus_to_hbus(ebus);
 376         struct pci_dev *pci = skl->pci;
 377         int err;
 378         unsigned short gcap;
 379         int cp_streams, pb_streams, start_idx;
 380
 381         err = pci_request_regions(pci, "Skylake HD audio");
 382         if (err < 0)
 383                 return err;
 384
 385         bus->addr = pci_resource_start(pci, 0);
 386         bus->remap_addr = pci_ioremap_bar(pci, 0);
 387         if (bus->remap_addr == NULL) {
 388                 dev_err(bus->dev, "ioremap error\n");
 389                 return -ENXIO;
 390         }
 391
 392         snd_hdac_ext_bus_parse_capabilities(ebus);
 393
 394         if (skl_acquire_irq(ebus, 0) < 0)
 395                 return -EBUSY;
 396
 397         pci_set_master(pci);
 398         synchronize_irq(bus->irq);
 399
 400         gcap = snd_hdac_chip_readw(bus, GCAP);
 401         dev_dbg(bus->dev, "chipset global capabilities = 0x%x\n", gcap);
 402
 403         /* allow 64bit DMA address if supported by H/W */
 404         if (!dma_set_mask(bus->dev, DMA_BIT_MASK(64))) {
 405                 dma_set_coherent_mask(bus->dev, DMA_BIT_MASK(64));
 406         } else {
 407                 dma_set_mask(bus->dev, DMA_BIT_MASK(32));
 408                 dma_set_coherent_mask(bus->dev, DMA_BIT_MASK(32));
 409         }
 410
 411         /* read number of streams from GCAP register */
 412         cp_streams = (gcap >> 8) & 0x0f;
 413         pb_streams = (gcap >> 12) & 0x0f;
 414
 415         if (!pb_streams && !cp_streams)
 416                 return -EIO;
 417
 418         ebus->num_streams = cp_streams + pb_streams;
 419
 420         /* initialize streams */
 421         snd_hdac_ext_stream_init_all
 422                 (ebus, 0, cp_streams, SNDRV_PCM_STREAM_CAPTURE);
 423         start_idx = cp_streams;
 424         snd_hdac_ext_stream_init_all
 425                 (ebus, start_idx, pb_streams, SNDRV_PCM_STREAM_PLAYBACK);
 426
 427         err = snd_hdac_bus_alloc_stream_pages(bus);
 428         if (err < 0)
 429                 return err;
 430
 431         /* initialize chip */
 432         skl_init_pci(skl);
 433
 434         snd_hdac_bus_init_chip(bus, true);
 435
 436         /* codec detection */
 437         if (!bus->codec_mask) {
 438                 dev_err(bus->dev, "no codecs found!\n");
 439                 return -ENODEV;
 440         }
 441
 442         return 0;
 443 }
 444
 445 static int skl_probe(struct pci_dev *pci,
 446                      const struct pci_device_id *pci_id)
 447 {
 448         struct skl *skl;
 449         struct hdac_ext_bus *ebus = NULL;
 450         struct hdac_bus *bus = NULL;
 451         int err;
 452
 453         /* we use ext core ops, so provide NULL for ops here */
 454         err = skl_create(pci, NULL, &skl);
 455         if (err < 0)
 456                 return err;
 457
 458         ebus = &skl->ebus;
 459         bus = ebus_to_hbus(ebus);
 460
 461         err = skl_first_init(ebus);
 462         if (err < 0)
 463                 goto out_free;
 464
 465         skl->nhlt = skl_nhlt_init(bus->dev);
 466
 467         if (skl->nhlt == NULL)
 468                 goto out_free;
 469
 470         pci_set_drvdata(skl->pci, ebus);
 471
 472         /* check if dsp is there */
 473         if (ebus->ppcap) {
 474                 err = skl_init_dsp(skl);
 475                 if (err < 0) {
 476                         dev_dbg(bus->dev, "error failed to register dsp\n");
 477                         goto out_free;
 478                 }
 479         }
 480         if (ebus->mlcap)
 481                 snd_hdac_ext_bus_get_ml_capabilities(ebus);
 482
 483         /* create device for soc dmic */
 484         err = skl_dmic_device_register(skl);
 485         if (err < 0)
 486                 goto out_dsp_free;
 487
 488         /* register platform dai and controls */
 489         err = skl_platform_register(bus->dev);
 490         if (err < 0)
 491                 goto out_dmic_free;
 492
 493         /* create codec instances */
 494         err = skl_codec_create(ebus);
 495         if (err < 0)
 496                 goto out_unregister;
 497
 498         /*configure PM */
 499         pm_runtime_set_autosuspend_delay(bus->dev, SKL_SUSPEND_DELAY);
 500         pm_runtime_use_autosuspend(bus->dev);
 501         pm_runtime_put_noidle(bus->dev);
 502         pm_runtime_allow(bus->dev);
 503
 504         return 0;
 505
 506 out_unregister:
 507         skl_platform_unregister(bus->dev);
 508 out_dmic_free:
 509         skl_dmic_device_unregister(skl);
 510 out_dsp_free:
 511         skl_free_dsp(skl);
 512 out_free:
 513         skl->init_failed = 1;
 514         skl_free(ebus);
 515
 516         return err;
 517 }
 518
 519 static void skl_remove(struct pci_dev *pci)
 520 {
 521         struct hdac_ext_bus *ebus = pci_get_drvdata(pci);
 522         struct skl *skl = ebus_to_skl(ebus);
 523
 524         if (skl->tplg)
 525                 release_firmware(skl->tplg);
 526
 527         if (pci_dev_run_wake(pci))
 528                 pm_runtime_get_noresume(&pci->dev);
 529         pci_dev_put(pci);
 530         skl_platform_unregister(&pci->dev);
 531         skl_free_dsp(skl);
 532         skl_dmic_device_unregister(skl);
 533         skl_free(ebus);
 534         dev_set_drvdata(&pci->dev, NULL);
 535 }
 536
 537 /* PCI IDs */
 538 static const struct pci_device_id skl_ids[] = {
 539         /* Sunrise Point-LP */
 540         { PCI_DEVICE(0x8086, 0x9d70), 0},
 541         { 0, }
 542 };
 543 MODULE_DEVICE_TABLE(pci, skl_ids);
 544
 545 /* pci_driver definition */
 546 static struct pci_driver skl_driver = {
 547         .name = KBUILD_MODNAME,
 548         .id_table = skl_ids,
 549         .probe = skl_probe,
 550         .remove = skl_remove,
 551         .driver = {
 552                 .pm = &skl_pm,
 553         },
 554 };
 555 module_pci_driver(skl_driver);
 556
 557 MODULE_LICENSE("GPL v2");
 558 MODULE_DESCRIPTION("Intel Skylake ASoC HDA driver");