drivers/soundwire/intel.c

   1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
   2 // Copyright(c) 2015-17 Intel Corporation.
   3
   4 /*
   5  * Soundwire Intel Master Driver
   6  */
   7
   8 #include <linux/acpi.h>
   9 #include <linux/delay.h>
  10 #include <linux/interrupt.h>
  11 #include <linux/platform_device.h>
  12 #include <sound/pcm_params.h>
  13 #include <sound/soc.h>
  14 #include <linux/soundwire/sdw_registers.h>
  15 #include <linux/soundwire/sdw.h>
  16 #include <linux/soundwire/sdw_intel.h>
  17 #include "cadence_master.h"
  18 #include "intel.h"
  19
  20 /* Intel SHIM Registers Definition */
  21 #define SDW_SHIM_LCAP                   0x0
  22 #define SDW_SHIM_LCTL                   0x4
  23 #define SDW_SHIM_IPPTR                  0x8
  24 #define SDW_SHIM_SYNC                   0xC
  25
  26 #define SDW_SHIM_CTLSCAP(x)             (0x010 + 0x60 * x)
  27 #define SDW_SHIM_CTLS0CM(x)             (0x012 + 0x60 * x)
  28 #define SDW_SHIM_CTLS1CM(x)             (0x014 + 0x60 * x)
  29 #define SDW_SHIM_CTLS2CM(x)             (0x016 + 0x60 * x)
  30 #define SDW_SHIM_CTLS3CM(x)             (0x018 + 0x60 * x)
  31 #define SDW_SHIM_PCMSCAP(x)             (0x020 + 0x60 * x)
  32
  33 #define SDW_SHIM_PCMSYCHM(x, y)         (0x022 + (0x60 * x) + (0x2 * y))
  34 #define SDW_SHIM_PCMSYCHC(x, y)         (0x042 + (0x60 * x) + (0x2 * y))
  35 #define SDW_SHIM_PDMSCAP(x)             (0x062 + 0x60 * x)
  36 #define SDW_SHIM_IOCTL(x)               (0x06C + 0x60 * x)
  37 #define SDW_SHIM_CTMCTL(x)              (0x06E + 0x60 * x)
  38
  39 #define SDW_SHIM_WAKEEN                 0x190
  40 #define SDW_SHIM_WAKESTS                0x192
  41
  42 #define SDW_SHIM_LCTL_SPA               BIT(0)
  43 #define SDW_SHIM_LCTL_CPA               BIT(8)
  44
  45 #define SDW_SHIM_SYNC_SYNCPRD_VAL       0x176F
  46 #define SDW_SHIM_SYNC_SYNCPRD           GENMASK(14, 0)
  47 #define SDW_SHIM_SYNC_SYNCCPU           BIT(15)
  48 #define SDW_SHIM_SYNC_CMDSYNC_MASK      GENMASK(19, 16)
  49 #define SDW_SHIM_SYNC_CMDSYNC           BIT(16)
  50 #define SDW_SHIM_SYNC_SYNCGO            BIT(24)
  51
  52 #define SDW_SHIM_PCMSCAP_ISS            GENMASK(3, 0)
  53 #define SDW_SHIM_PCMSCAP_OSS            GENMASK(7, 4)
  54 #define SDW_SHIM_PCMSCAP_BSS            GENMASK(12, 8)
  55
  56 #define SDW_SHIM_PCMSYCM_LCHN           GENMASK(3, 0)
  57 #define SDW_SHIM_PCMSYCM_HCHN           GENMASK(7, 4)
  58 #define SDW_SHIM_PCMSYCM_STREAM         GENMASK(13, 8)
  59 #define SDW_SHIM_PCMSYCM_DIR            BIT(15)
  60
  61 #define SDW_SHIM_PDMSCAP_ISS            GENMASK(3, 0)
  62 #define SDW_SHIM_PDMSCAP_OSS            GENMASK(7, 4)
  63 #define SDW_SHIM_PDMSCAP_BSS            GENMASK(12, 8)
  64 #define SDW_SHIM_PDMSCAP_CPSS           GENMASK(15, 13)
  65
  66 #define SDW_SHIM_IOCTL_MIF              BIT(0)
  67 #define SDW_SHIM_IOCTL_CO               BIT(1)
  68 #define SDW_SHIM_IOCTL_COE              BIT(2)
  69 #define SDW_SHIM_IOCTL_DO               BIT(3)
  70 #define SDW_SHIM_IOCTL_DOE              BIT(4)
  71 #define SDW_SHIM_IOCTL_BKE              BIT(5)
  72 #define SDW_SHIM_IOCTL_WPDD             BIT(6)
  73 #define SDW_SHIM_IOCTL_CIBD             BIT(8)
  74 #define SDW_SHIM_IOCTL_DIBD             BIT(9)
  75
  76 #define SDW_SHIM_CTMCTL_DACTQE          BIT(0)
  77 #define SDW_SHIM_CTMCTL_DODS            BIT(1)
  78 #define SDW_SHIM_CTMCTL_DOAIS           GENMASK(4, 3)
  79
  80 #define SDW_SHIM_WAKEEN_ENABLE          BIT(0)
  81 #define SDW_SHIM_WAKESTS_STATUS         BIT(0)
  82
  83 /* Intel ALH Register definitions */
  84 #define SDW_ALH_STRMZCFG(x)             (0x000 + (0x4 * x))
  85
  86 #define SDW_ALH_STRMZCFG_DMAT_VAL       0x3
  87 #define SDW_ALH_STRMZCFG_DMAT           GENMASK(7, 0)
  88 #define SDW_ALH_STRMZCFG_CHN            GENMASK(19, 16)
  89
  90 enum intel_pdi_type {
  91         INTEL_PDI_IN = 0,
  92         INTEL_PDI_OUT = 1,
  93         INTEL_PDI_BD = 2,
  94 };
  95
  96 struct sdw_intel {
  97         struct sdw_cdns cdns;
  98         int instance;
  99         struct sdw_intel_link_res *res;
 100 };
 101
 102 #define cdns_to_intel(_cdns) container_of(_cdns, struct sdw_intel, cdns)
 103
 104 /*
 105  * Read, write helpers for HW registers
 106  */
 107 static inline int intel_readl(void __iomem *base, int offset)
 108 {
 109         return readl(base + offset);
 110 }
 111
 112 static inline void intel_writel(void __iomem *base, int offset, int value)
 113 {
 114         writel(value, base + offset);
 115 }
 116
 117 static inline u16 intel_readw(void __iomem *base, int offset)
 118 {
 119         return readw(base + offset);
 120 }
 121
 122 static inline void intel_writew(void __iomem *base, int offset, u16 value)
 123 {
 124         writew(value, base + offset);
 125 }
 126
 127 static int intel_clear_bit(void __iomem *base, int offset, u32 value, u32 mask)
 128 {
 129         int timeout = 10;
 130         u32 reg_read;
 131
 132         writel(value, base + offset);
 133         do {
 134                 reg_read = readl(base + offset);
 135                 if (!(reg_read & mask))
 136                         return 0;
 137
 138                 timeout--;
 139                 udelay(50);
 140         } while (timeout != 0);
 141
 142         return -EAGAIN;
 143 }
 144
 145 static int intel_set_bit(void __iomem *base, int offset, u32 value, u32 mask)
 146 {
 147         int timeout = 10;
 148         u32 reg_read;
 149
 150         writel(value, base + offset);
 151         do {
 152                 reg_read = readl(base + offset);
 153                 if (reg_read & mask)
 154                         return 0;
 155
 156                 timeout--;
 157                 udelay(50);
 158         } while (timeout != 0);
 159
 160         return -EAGAIN;
 161 }
 162
 163 /*
 164  * shim ops
 165  */
 166
 167 static int intel_link_power_up(struct sdw_intel *sdw)
 168 {
 169         unsigned int link_id = sdw->instance;
 170         void __iomem *shim = sdw->res->shim;
 171         int spa_mask, cpa_mask;
 172         int link_control, ret;
 173
 174         /* Link power up sequence */
 175         link_control = intel_readl(shim, SDW_SHIM_LCTL);
 176         spa_mask = (SDW_SHIM_LCTL_SPA << link_id);
 177         cpa_mask = (SDW_SHIM_LCTL_CPA << link_id);
 178         link_control |=  spa_mask;
 179
 180         ret = intel_set_bit(shim, SDW_SHIM_LCTL, link_control, cpa_mask);
 181         if (ret < 0)
 182                 return ret;
 183
 184         sdw->cdns.link_up = true;
 185         return 0;
 186 }
 187
 188 static int intel_shim_init(struct sdw_intel *sdw)
 189 {
 190         void __iomem *shim = sdw->res->shim;
 191         unsigned int link_id = sdw->instance;
 192         int sync_reg, ret;
 193         u16 ioctl = 0, act = 0;
 194
 195         /* Initialize Shim */
 196         ioctl |= SDW_SHIM_IOCTL_BKE;
 197         intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
 198
 199         ioctl |= SDW_SHIM_IOCTL_WPDD;
 200         intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
 201
 202         ioctl |= SDW_SHIM_IOCTL_DO;
 203         intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
 204
 205         ioctl |= SDW_SHIM_IOCTL_DOE;
 206         intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
 207
 208         /* Switch to MIP from Glue logic */
 209         ioctl = intel_readw(shim,  SDW_SHIM_IOCTL(link_id));
 210
 211         ioctl &= ~(SDW_SHIM_IOCTL_DOE);
 212         intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
 213
 214         ioctl &= ~(SDW_SHIM_IOCTL_DO);
 215         intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
 216
 217         ioctl |= (SDW_SHIM_IOCTL_MIF);
 218         intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
 219
 220         ioctl &= ~(SDW_SHIM_IOCTL_BKE);
 221         ioctl &= ~(SDW_SHIM_IOCTL_COE);
 222
 223         intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
 224
 225         act |= 0x1 << SDW_REG_SHIFT(SDW_SHIM_CTMCTL_DOAIS);
 226         act |= SDW_SHIM_CTMCTL_DACTQE;
 227         act |= SDW_SHIM_CTMCTL_DODS;
 228         intel_writew(shim, SDW_SHIM_CTMCTL(link_id), act);
 229
 230         /* Now set SyncPRD period */
 231         sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
 232         sync_reg |= (SDW_SHIM_SYNC_SYNCPRD_VAL <<
 233                         SDW_REG_SHIFT(SDW_SHIM_SYNC_SYNCPRD));
 234
 235         /* Set SyncCPU bit */
 236         sync_reg |= SDW_SHIM_SYNC_SYNCCPU;
 237         ret = intel_clear_bit(shim, SDW_SHIM_SYNC, sync_reg,
 238                                 SDW_SHIM_SYNC_SYNCCPU);
 239         if (ret < 0)
 240                 dev_err(sdw->cdns.dev, "Failed to set sync period: %d", ret);
 241
 242         return ret;
 243 }
 244
 245 /*
 246  * PDI routines
 247  */
 248 static void intel_pdi_init(struct sdw_intel *sdw,
 249                         struct sdw_cdns_stream_config *config)
 250 {
 251         void __iomem *shim = sdw->res->shim;
 252         unsigned int link_id = sdw->instance;
 253         int pcm_cap, pdm_cap;
 254
 255         /* PCM Stream Capability */
 256         pcm_cap = intel_readw(shim, SDW_SHIM_PCMSCAP(link_id));
 257
 258         config->pcm_bd = (pcm_cap & SDW_SHIM_PCMSCAP_BSS) >>
 259                                         SDW_REG_SHIFT(SDW_SHIM_PCMSCAP_BSS);
 260         config->pcm_in = (pcm_cap & SDW_SHIM_PCMSCAP_ISS) >>
 261                                         SDW_REG_SHIFT(SDW_SHIM_PCMSCAP_ISS);
 262         config->pcm_out = (pcm_cap & SDW_SHIM_PCMSCAP_OSS) >>
 263                                         SDW_REG_SHIFT(SDW_SHIM_PCMSCAP_OSS);
 264
 265         /* PDM Stream Capability */
 266         pdm_cap = intel_readw(shim, SDW_SHIM_PDMSCAP(link_id));
 267
 268         config->pdm_bd = (pdm_cap & SDW_SHIM_PDMSCAP_BSS) >>
 269                                         SDW_REG_SHIFT(SDW_SHIM_PDMSCAP_BSS);
 270         config->pdm_in = (pdm_cap & SDW_SHIM_PDMSCAP_ISS) >>
 271                                         SDW_REG_SHIFT(SDW_SHIM_PDMSCAP_ISS);
 272         config->pdm_out = (pdm_cap & SDW_SHIM_PDMSCAP_OSS) >>
 273                                         SDW_REG_SHIFT(SDW_SHIM_PDMSCAP_OSS);
 274 }
 275
 276 static int
 277 intel_pdi_get_ch_cap(struct sdw_intel *sdw, unsigned int pdi_num, bool pcm)
 278 {
 279         void __iomem *shim = sdw->res->shim;
 280         unsigned int link_id = sdw->instance;
 281         int count;
 282
 283         if (pcm) {
 284                 count = intel_readw(shim, SDW_SHIM_PCMSYCHC(link_id, pdi_num));
 285         } else {
 286                 count = intel_readw(shim, SDW_SHIM_PDMSCAP(link_id));
 287                 count = ((count & SDW_SHIM_PDMSCAP_CPSS) >>
 288                                         SDW_REG_SHIFT(SDW_SHIM_PDMSCAP_CPSS));
 289         }
 290
 291         /* zero based values for channel count in register */
 292         count++;
 293
 294         return count;
 295 }
 296
 297 static int intel_pdi_get_ch_update(struct sdw_intel *sdw,
 298                                 struct sdw_cdns_pdi *pdi,
 299                                 unsigned int num_pdi,
 300                                 unsigned int *num_ch, bool pcm)
 301 {
 302         int i, ch_count = 0;
 303
 304         for (i = 0; i < num_pdi; i++) {
 305                 pdi->ch_count = intel_pdi_get_ch_cap(sdw, pdi->num, pcm);
 306                 ch_count += pdi->ch_count;
 307                 pdi++;
 308         }
 309
 310         *num_ch = ch_count;
 311         return 0;
 312 }
 313
 314 static int intel_pdi_stream_ch_update(struct sdw_intel *sdw,
 315                                 struct sdw_cdns_streams *stream, bool pcm)
 316 {
 317         intel_pdi_get_ch_update(sdw, stream->bd, stream->num_bd,
 318                         &stream->num_ch_bd, pcm);
 319
 320         intel_pdi_get_ch_update(sdw, stream->in, stream->num_in,
 321                         &stream->num_ch_in, pcm);
 322
 323         intel_pdi_get_ch_update(sdw, stream->out, stream->num_out,
 324                         &stream->num_ch_out, pcm);
 325
 326         return 0;
 327 }
 328
 329 static int intel_pdi_ch_update(struct sdw_intel *sdw)
 330 {
 331         /* First update PCM streams followed by PDM streams */
 332         intel_pdi_stream_ch_update(sdw, &sdw->cdns.pcm, true);
 333         intel_pdi_stream_ch_update(sdw, &sdw->cdns.pdm, false);
 334
 335         return 0;
 336 }
 337
 338 static void
 339 intel_pdi_shim_configure(struct sdw_intel *sdw, struct sdw_cdns_pdi *pdi)
 340 {
 341         void __iomem *shim = sdw->res->shim;
 342         unsigned int link_id = sdw->instance;
 343         int pdi_conf = 0;
 344
 345         pdi->intel_alh_id = (link_id * 16) + pdi->num + 5;
 346
 347         /*
 348          * Program stream parameters to stream SHIM register
 349          * This is applicable for PCM stream only.
 350          */
 351         if (pdi->type != SDW_STREAM_PCM)
 352                 return;
 353
 354         if (pdi->dir == SDW_DATA_DIR_RX)
 355                 pdi_conf |= SDW_SHIM_PCMSYCM_DIR;
 356         else
 357                 pdi_conf &= ~(SDW_SHIM_PCMSYCM_DIR);
 358
 359         pdi_conf |= (pdi->intel_alh_id <<
 360                         SDW_REG_SHIFT(SDW_SHIM_PCMSYCM_STREAM));
 361         pdi_conf |= (pdi->l_ch_num << SDW_REG_SHIFT(SDW_SHIM_PCMSYCM_LCHN));
 362         pdi_conf |= (pdi->h_ch_num << SDW_REG_SHIFT(SDW_SHIM_PCMSYCM_HCHN));
 363
 364         intel_writew(shim, SDW_SHIM_PCMSYCHM(link_id, pdi->num), pdi_conf);
 365 }
 366
 367 static void
 368 intel_pdi_alh_configure(struct sdw_intel *sdw, struct sdw_cdns_pdi *pdi)
 369 {
 370         void __iomem *alh = sdw->res->alh;
 371         unsigned int link_id = sdw->instance;
 372         unsigned int conf;
 373
 374         pdi->intel_alh_id = (link_id * 16) + pdi->num + 5;
 375
 376         /* Program Stream config ALH register */
 377         conf = intel_readl(alh, SDW_ALH_STRMZCFG(pdi->intel_alh_id));
 378
 379         conf |= (SDW_ALH_STRMZCFG_DMAT_VAL <<
 380                         SDW_REG_SHIFT(SDW_ALH_STRMZCFG_DMAT));
 381
 382         conf |= ((pdi->ch_count - 1) <<
 383                         SDW_REG_SHIFT(SDW_ALH_STRMZCFG_CHN));
 384
 385         intel_writel(alh, SDW_ALH_STRMZCFG(pdi->intel_alh_id), conf);
 386 }
 387
 388 static int intel_config_stream(struct sdw_intel *sdw,
 389                         struct snd_pcm_substream *substream,
 390                         struct snd_soc_dai *dai,
 391                         struct snd_pcm_hw_params *hw_params, int link_id)
 392 {
 393         if (sdw->res->ops && sdw->res->ops->config_stream)
 394                 return sdw->res->ops->config_stream(sdw->res->arg,
 395                                 substream, dai, hw_params, link_id);
 396
 397         return -EIO;
 398 }
 399
 400 /*
 401  * DAI routines
 402  */
 403
 404 static struct sdw_cdns_port *intel_alloc_port(struct sdw_intel *sdw,
 405                                 u32 ch, u32 dir, bool pcm)
 406 {
 407         struct sdw_cdns *cdns = &sdw->cdns;
 408         struct sdw_cdns_port *port = NULL;
 409         int i, ret = 0;
 410
 411         for (i = 0; i < cdns->num_ports; i++) {
 412                 if (cdns->ports[i].assigned == true)
 413                         continue;
 414
 415                 port = &cdns->ports[i];
 416                 port->assigned = true;
 417                 port->direction = dir;
 418                 port->ch = ch;
 419                 break;
 420         }
 421
 422         if (!port) {
 423                 dev_err(cdns->dev, "Unable to find a free port\n");
 424                 return NULL;
 425         }
 426
 427         if (pcm) {
 428                 ret = sdw_cdns_alloc_stream(cdns, &cdns->pcm, port, ch, dir);
 429                 if (ret)
 430                         goto out;
 431
 432                 intel_pdi_shim_configure(sdw, port->pdi);
 433                 sdw_cdns_config_stream(cdns, port, ch, dir, port->pdi);
 434
 435                 intel_pdi_alh_configure(sdw, port->pdi);
 436
 437         } else {
 438                 ret = sdw_cdns_alloc_stream(cdns, &cdns->pdm, port, ch, dir);
 439         }
 440
 441 out:
 442         if (ret) {
 443                 port->assigned = false;
 444                 port = NULL;
 445         }
 446
 447         return port;
 448 }
 449
 450 static void intel_port_cleanup(struct sdw_cdns_dma_data *dma)
 451 {
 452         int i;
 453
 454         for (i = 0; i < dma->nr_ports; i++) {
 455                 if (dma->port[i]) {
 456                         dma->port[i]->pdi->assigned = false;
 457                         dma->port[i]->pdi = NULL;
 458                         dma->port[i]->assigned = false;
 459                         dma->port[i] = NULL;
 460                 }
 461         }
 462 }
 463
 464 static int intel_hw_params(struct snd_pcm_substream *substream,
 465                                 struct snd_pcm_hw_params *params,
 466                                 struct snd_soc_dai *dai)
 467 {
 468         struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
 469         struct sdw_intel *sdw = cdns_to_intel(cdns);
 470         struct sdw_cdns_dma_data *dma;
 471         struct sdw_stream_config sconfig;
 472         struct sdw_port_config *pconfig;
 473         int ret, i, ch, dir;
 474         bool pcm = true;
 475
 476         dma = snd_soc_dai_get_dma_data(dai, substream);
 477         if (!dma)
 478                 return -EIO;
 479
 480         ch = params_channels(params);
 481         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 482                 dir = SDW_DATA_DIR_RX;
 483         else
 484                 dir = SDW_DATA_DIR_TX;
 485
 486         if (dma->stream_type == SDW_STREAM_PDM) {
 487                 /* TODO: Check whether PDM decimator is already in use */
 488                 dma->nr_ports = sdw_cdns_get_stream(cdns, &cdns->pdm, ch, dir);
 489                 pcm = false;
 490         } else {
 491                 dma->nr_ports = sdw_cdns_get_stream(cdns, &cdns->pcm, ch, dir);
 492         }
 493
 494         if (!dma->nr_ports) {
 495                 dev_err(dai->dev, "ports/resources not available");
 496                 return -EINVAL;
 497         }
 498
 499         dma->port = kcalloc(dma->nr_ports, sizeof(*dma->port), GFP_KERNEL);
 500         if (!dma->port)
 501                 return -ENOMEM;
 502
 503         for (i = 0; i < dma->nr_ports; i++) {
 504                 dma->port[i] = intel_alloc_port(sdw, ch, dir, pcm);
 505                 if (!dma->port[i]) {
 506                         ret = -EINVAL;
 507                         goto port_error;
 508                 }
 509         }
 510
 511         /* Inform DSP about PDI stream number */
 512         for (i = 0; i < dma->nr_ports; i++) {
 513                 ret = intel_config_stream(sdw, substream, dai, params,
 514                                 dma->port[i]->pdi->intel_alh_id);
 515                 if (ret)
 516                         goto port_error;
 517         }
 518
 519         sconfig.direction = dir;
 520         sconfig.ch_count = ch;
 521         sconfig.frame_rate = params_rate(params);
 522         sconfig.type = dma->stream_type;
 523
 524         if (dma->stream_type == SDW_STREAM_PDM) {
 525                 sconfig.frame_rate *= 50;
 526                 sconfig.bps = 1;
 527         } else {
 528                 sconfig.bps = snd_pcm_format_width(params_format(params));
 529         }
 530
 531         /* Port configuration */
 532         pconfig = kcalloc(dma->nr_ports, sizeof(*pconfig), GFP_KERNEL);
 533         if (!pconfig) {
 534                 ret =  -ENOMEM;
 535                 goto port_error;
 536         }
 537
 538         for (i = 0; i < dma->nr_ports; i++) {
 539                 pconfig[i].num = dma->port[i]->num;
 540                 pconfig[i].ch_mask = (1 << ch) - 1;
 541         }
 542
 543         ret = sdw_stream_add_master(&cdns->bus, &sconfig,
 544                                 pconfig, dma->nr_ports, dma->stream);
 545         if (ret) {
 546                 dev_err(cdns->dev, "add master to stream failed:%d", ret);
 547                 goto stream_error;
 548         }
 549
 550         kfree(pconfig);
 551         return ret;
 552
 553 stream_error:
 554         kfree(pconfig);
 555 port_error:
 556         intel_port_cleanup(dma);
 557         kfree(dma->port);
 558         return ret;
 559 }
 560
 561 static int
 562 intel_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
 563 {
 564         struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
 565         struct sdw_cdns_dma_data *dma;
 566         int ret;
 567
 568         dma = snd_soc_dai_get_dma_data(dai, substream);
 569         if (!dma)
 570                 return -EIO;
 571
 572         ret = sdw_stream_remove_master(&cdns->bus, dma->stream);
 573         if (ret < 0)
 574                 dev_err(dai->dev, "remove master from stream %s failed: %d",
 575                                                         dma->stream->name, ret);
 576
 577         intel_port_cleanup(dma);
 578         kfree(dma->port);
 579         return ret;
 580 }
 581
 582 static int intel_pcm_set_sdw_stream(struct snd_soc_dai *dai,
 583                                         void *stream, int direction)
 584 {
 585         return cdns_set_sdw_stream(dai, stream, true, direction);
 586 }
 587
 588 static int intel_pdm_set_sdw_stream(struct snd_soc_dai *dai,
 589                                         void *stream, int direction)
 590 {
 591         return cdns_set_sdw_stream(dai, stream, false, direction);
 592 }
 593
 594 static struct snd_soc_dai_ops intel_pcm_dai_ops = {
 595         .hw_params = intel_hw_params,
 596         .hw_free = intel_hw_free,
 597         .shutdown = sdw_cdns_shutdown,
 598         .set_sdw_stream = intel_pcm_set_sdw_stream,
 599 };
 600
 601 static struct snd_soc_dai_ops intel_pdm_dai_ops = {
 602         .hw_params = intel_hw_params,
 603         .hw_free = intel_hw_free,
 604         .shutdown = sdw_cdns_shutdown,
 605         .set_sdw_stream = intel_pdm_set_sdw_stream,
 606 };
 607
 608 static const struct snd_soc_component_driver dai_component = {
 609         .name           = "soundwire",
 610 };
 611
 612 static int intel_create_dai(struct sdw_cdns *cdns,
 613                         struct snd_soc_dai_driver *dais,
 614                         enum intel_pdi_type type,
 615                         u32 num, u32 off, u32 max_ch, bool pcm)
 616 {
 617         int i;
 618
 619         if (num == 0)
 620                 return 0;
 621
 622          /* TODO: Read supported rates/formats from hardware */
 623         for (i = off; i < (off + num); i++) {
 624                 dais[i].name = kasprintf(GFP_KERNEL, "SDW%d Pin%d",
 625                                         cdns->instance, i);
 626                 if (!dais[i].name)
 627                         return -ENOMEM;
 628
 629                 if (type == INTEL_PDI_BD || type == INTEL_PDI_OUT) {
 630                         dais[i].playback.stream_name = kasprintf(GFP_KERNEL,
 631                                                         "SDW%d Tx%d",
 632                                                         cdns->instance, i);
 633                         if (!dais[i].playback.stream_name) {
 634                                 kfree(dais[i].name);
 635                                 return -ENOMEM;
 636                         }
 637
 638                         dais[i].playback.channels_min = 1;
 639                         dais[i].playback.channels_max = max_ch;
 640                         dais[i].playback.rates = SNDRV_PCM_RATE_48000;
 641                         dais[i].playback.formats = SNDRV_PCM_FMTBIT_S16_LE;
 642                 }
 643
 644                 if (type == INTEL_PDI_BD || type == INTEL_PDI_IN) {
 645                         dais[i].capture.stream_name = kasprintf(GFP_KERNEL,
 646                                                         "SDW%d Rx%d",
 647                                                         cdns->instance, i);
 648                         if (!dais[i].capture.stream_name) {
 649                                 kfree(dais[i].name);
 650                                 kfree(dais[i].playback.stream_name);
 651                                 return -ENOMEM;
 652                         }
 653
 654                         dais[i].playback.channels_min = 1;
 655                         dais[i].playback.channels_max = max_ch;
 656                         dais[i].capture.rates = SNDRV_PCM_RATE_48000;
 657                         dais[i].capture.formats = SNDRV_PCM_FMTBIT_S16_LE;
 658                 }
 659
 660                 dais[i].id = SDW_DAI_ID_RANGE_START + i;
 661
 662                 if (pcm)
 663                         dais[i].ops = &intel_pcm_dai_ops;
 664                 else
 665                         dais[i].ops = &intel_pdm_dai_ops;
 666         }
 667
 668         return 0;
 669 }
 670
 671 static int intel_register_dai(struct sdw_intel *sdw)
 672 {
 673         struct sdw_cdns *cdns = &sdw->cdns;
 674         struct sdw_cdns_streams *stream;
 675         struct snd_soc_dai_driver *dais;
 676         int num_dai, ret, off = 0;
 677
 678         /* DAIs are created based on total number of PDIs supported */
 679         num_dai = cdns->pcm.num_pdi + cdns->pdm.num_pdi;
 680
 681         dais = devm_kcalloc(cdns->dev, num_dai, sizeof(*dais), GFP_KERNEL);
 682         if (!dais)
 683                 return -ENOMEM;
 684
 685         /* Create PCM DAIs */
 686         stream = &cdns->pcm;
 687
 688         ret = intel_create_dai(cdns, dais, INTEL_PDI_IN,
 689                         stream->num_in, off, stream->num_ch_in, true);
 690         if (ret)
 691                 return ret;
 692
 693         off += cdns->pcm.num_in;
 694         ret = intel_create_dai(cdns, dais, INTEL_PDI_OUT,
 695                         cdns->pcm.num_out, off, stream->num_ch_out, true);
 696         if (ret)
 697                 return ret;
 698
 699         off += cdns->pcm.num_out;
 700         ret = intel_create_dai(cdns, dais, INTEL_PDI_BD,
 701                         cdns->pcm.num_bd, off, stream->num_ch_bd, true);
 702         if (ret)
 703                 return ret;
 704
 705         /* Create PDM DAIs */
 706         stream = &cdns->pdm;
 707         off += cdns->pcm.num_bd;
 708         ret = intel_create_dai(cdns, dais, INTEL_PDI_IN,
 709                         cdns->pdm.num_in, off, stream->num_ch_in, false);
 710         if (ret)
 711                 return ret;
 712
 713         off += cdns->pdm.num_in;
 714         ret = intel_create_dai(cdns, dais, INTEL_PDI_OUT,
 715                         cdns->pdm.num_out, off, stream->num_ch_out, false);
 716         if (ret)
 717                 return ret;
 718
 719         off += cdns->pdm.num_bd;
 720         ret = intel_create_dai(cdns, dais, INTEL_PDI_BD,
 721                         cdns->pdm.num_bd, off, stream->num_ch_bd, false);
 722         if (ret)
 723                 return ret;
 724
 725         return snd_soc_register_component(cdns->dev, &dai_component,
 726                                 dais, num_dai);
 727 }
 728
 729 static int intel_prop_read(struct sdw_bus *bus)
 730 {
 731         /* Initialize with default handler to read all DisCo properties */
 732         sdw_master_read_prop(bus);
 733
 734         /* BIOS is not giving some values correctly. So, lets override them */
 735         bus->prop.num_freq = 1;
 736         bus->prop.freq = devm_kcalloc(bus->dev, sizeof(*bus->prop.freq),
 737                                         bus->prop.num_freq, GFP_KERNEL);
 738         if (!bus->prop.freq)
 739                 return -ENOMEM;
 740
 741         bus->prop.freq[0] = bus->prop.max_freq;
 742         bus->prop.err_threshold = 5;
 743
 744         return 0;
 745 }
 746
 747 static struct sdw_master_ops sdw_intel_ops = {
 748         .read_prop = sdw_master_read_prop,
 749         .xfer_msg = cdns_xfer_msg,
 750         .xfer_msg_defer = cdns_xfer_msg_defer,
 751         .reset_page_addr = cdns_reset_page_addr,
 752         .set_bus_conf = cdns_bus_conf,
 753 };
 754
 755 /*
 756  * probe and init
 757  */
 758 static int intel_probe(struct platform_device *pdev)
 759 {
 760         struct sdw_cdns_stream_config config;
 761         struct sdw_intel *sdw;
 762         int ret;
 763
 764         sdw = devm_kzalloc(&pdev->dev, sizeof(*sdw), GFP_KERNEL);
 765         if (!sdw)
 766                 return -ENOMEM;
 767
 768         sdw->instance = pdev->id;
 769         sdw->res = dev_get_platdata(&pdev->dev);
 770         sdw->cdns.dev = &pdev->dev;
 771         sdw->cdns.registers = sdw->res->registers;
 772         sdw->cdns.instance = sdw->instance;
 773         sdw->cdns.msg_count = 0;
 774         sdw->cdns.bus.dev = &pdev->dev;
 775         sdw->cdns.bus.link_id = pdev->id;
 776
 777         sdw_cdns_probe(&sdw->cdns);
 778
 779         /* Set property read ops */
 780         sdw_intel_ops.read_prop = intel_prop_read;
 781         sdw->cdns.bus.ops = &sdw_intel_ops;
 782
 783         sdw_intel_ops.read_prop = intel_prop_read;
 784         sdw->cdns.bus.ops = &sdw_intel_ops;
 785
 786         platform_set_drvdata(pdev, sdw);
 787
 788         ret = sdw_add_bus_master(&sdw->cdns.bus);
 789         if (ret) {
 790                 dev_err(&pdev->dev, "sdw_add_bus_master fail: %d\n", ret);
 791                 goto err_master_reg;
 792         }
 793
 794         /* Initialize shim and controller */
 795         intel_link_power_up(sdw);
 796         intel_shim_init(sdw);
 797
 798         ret = sdw_cdns_init(&sdw->cdns);
 799         if (ret)
 800                 goto err_init;
 801
 802         ret = sdw_cdns_enable_interrupt(&sdw->cdns);
 803
 804         /* Read the PDI config and initialize cadence PDI */
 805         intel_pdi_init(sdw, &config);
 806         ret = sdw_cdns_pdi_init(&sdw->cdns, config);
 807         if (ret)
 808                 goto err_init;
 809
 810         intel_pdi_ch_update(sdw);
 811
 812         /* Acquire IRQ */
 813         ret = request_threaded_irq(sdw->res->irq, sdw_cdns_irq,
 814                         sdw_cdns_thread, IRQF_SHARED, KBUILD_MODNAME,
 815                         &sdw->cdns);
 816         if (ret < 0) {
 817                 dev_err(sdw->cdns.dev, "unable to grab IRQ %d, disabling device\n",
 818                                 sdw->res->irq);
 819                 goto err_init;
 820         }
 821
 822         /* Register DAIs */
 823         ret = intel_register_dai(sdw);
 824         if (ret) {
 825                 dev_err(sdw->cdns.dev, "DAI registration failed: %d", ret);
 826                 snd_soc_unregister_component(sdw->cdns.dev);
 827                 goto err_dai;
 828         }
 829
 830         return 0;
 831
 832 err_dai:
 833         free_irq(sdw->res->irq, sdw);
 834 err_init:
 835         sdw_delete_bus_master(&sdw->cdns.bus);
 836 err_master_reg:
 837         return ret;
 838 }
 839
 840 static int intel_remove(struct platform_device *pdev)
 841 {
 842         struct sdw_intel *sdw;
 843
 844         sdw = platform_get_drvdata(pdev);
 845
 846         free_irq(sdw->res->irq, sdw);
 847         snd_soc_unregister_component(sdw->cdns.dev);
 848         sdw_delete_bus_master(&sdw->cdns.bus);
 849
 850         return 0;
 851 }
 852
 853 static struct platform_driver sdw_intel_drv = {
 854         .probe = intel_probe,
 855         .remove = intel_remove,
 856         .driver = {
 857                 .name = "int-sdw",
 858
 859         },
 860 };
 861
 862 module_platform_driver(sdw_intel_drv);
 863
 864 MODULE_LICENSE("Dual BSD/GPL");
 865 MODULE_ALIAS("platform:int-sdw");
 866 MODULE_DESCRIPTION("Intel Soundwire Master Driver");