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/debugfs.h>
  10 #include <linux/delay.h>
  11 #include <linux/module.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/io.h>
  14 #include <linux/platform_device.h>
  15 #include <sound/pcm_params.h>
  16 #include <sound/soc.h>
  17 #include <linux/soundwire/sdw_registers.h>
  18 #include <linux/soundwire/sdw.h>
  19 #include <linux/soundwire/sdw_intel.h>
  20 #include "cadence_master.h"
  21 #include "bus.h"
  22 #include "intel.h"
  23
  24 /* Intel SHIM Registers Definition */
  25 #define SDW_SHIM_LCAP                   0x0
  26 #define SDW_SHIM_LCTL                   0x4
  27 #define SDW_SHIM_IPPTR                  0x8
  28 #define SDW_SHIM_SYNC                   0xC
  29
  30 #define SDW_SHIM_CTLSCAP(x)             (0x010 + 0x60 * (x))
  31 #define SDW_SHIM_CTLS0CM(x)             (0x012 + 0x60 * (x))
  32 #define SDW_SHIM_CTLS1CM(x)             (0x014 + 0x60 * (x))
  33 #define SDW_SHIM_CTLS2CM(x)             (0x016 + 0x60 * (x))
  34 #define SDW_SHIM_CTLS3CM(x)             (0x018 + 0x60 * (x))
  35 #define SDW_SHIM_PCMSCAP(x)             (0x020 + 0x60 * (x))
  36
  37 #define SDW_SHIM_PCMSYCHM(x, y)         (0x022 + (0x60 * (x)) + (0x2 * (y)))
  38 #define SDW_SHIM_PCMSYCHC(x, y)         (0x042 + (0x60 * (x)) + (0x2 * (y)))
  39 #define SDW_SHIM_PDMSCAP(x)             (0x062 + 0x60 * (x))
  40 #define SDW_SHIM_IOCTL(x)               (0x06C + 0x60 * (x))
  41 #define SDW_SHIM_CTMCTL(x)              (0x06E + 0x60 * (x))
  42
  43 #define SDW_SHIM_WAKEEN                 0x190
  44 #define SDW_SHIM_WAKESTS                0x192
  45
  46 #define SDW_SHIM_LCTL_SPA               BIT(0)
  47 #define SDW_SHIM_LCTL_CPA               BIT(8)
  48
  49 #define SDW_SHIM_SYNC_SYNCPRD_VAL       0x176F
  50 #define SDW_SHIM_SYNC_SYNCPRD           GENMASK(14, 0)
  51 #define SDW_SHIM_SYNC_SYNCCPU           BIT(15)
  52 #define SDW_SHIM_SYNC_CMDSYNC_MASK      GENMASK(19, 16)
  53 #define SDW_SHIM_SYNC_CMDSYNC           BIT(16)
  54 #define SDW_SHIM_SYNC_SYNCGO            BIT(24)
  55
  56 #define SDW_SHIM_PCMSCAP_ISS            GENMASK(3, 0)
  57 #define SDW_SHIM_PCMSCAP_OSS            GENMASK(7, 4)
  58 #define SDW_SHIM_PCMSCAP_BSS            GENMASK(12, 8)
  59
  60 #define SDW_SHIM_PCMSYCM_LCHN           GENMASK(3, 0)
  61 #define SDW_SHIM_PCMSYCM_HCHN           GENMASK(7, 4)
  62 #define SDW_SHIM_PCMSYCM_STREAM         GENMASK(13, 8)
  63 #define SDW_SHIM_PCMSYCM_DIR            BIT(15)
  64
  65 #define SDW_SHIM_PDMSCAP_ISS            GENMASK(3, 0)
  66 #define SDW_SHIM_PDMSCAP_OSS            GENMASK(7, 4)
  67 #define SDW_SHIM_PDMSCAP_BSS            GENMASK(12, 8)
  68 #define SDW_SHIM_PDMSCAP_CPSS           GENMASK(15, 13)
  69
  70 #define SDW_SHIM_IOCTL_MIF              BIT(0)
  71 #define SDW_SHIM_IOCTL_CO               BIT(1)
  72 #define SDW_SHIM_IOCTL_COE              BIT(2)
  73 #define SDW_SHIM_IOCTL_DO               BIT(3)
  74 #define SDW_SHIM_IOCTL_DOE              BIT(4)
  75 #define SDW_SHIM_IOCTL_BKE              BIT(5)
  76 #define SDW_SHIM_IOCTL_WPDD             BIT(6)
  77 #define SDW_SHIM_IOCTL_CIBD             BIT(8)
  78 #define SDW_SHIM_IOCTL_DIBD             BIT(9)
  79
  80 #define SDW_SHIM_CTMCTL_DACTQE          BIT(0)
  81 #define SDW_SHIM_CTMCTL_DODS            BIT(1)
  82 #define SDW_SHIM_CTMCTL_DOAIS           GENMASK(4, 3)
  83
  84 #define SDW_SHIM_WAKEEN_ENABLE          BIT(0)
  85 #define SDW_SHIM_WAKESTS_STATUS         BIT(0)
  86
  87 /* Intel ALH Register definitions */
  88 #define SDW_ALH_STRMZCFG(x)             (0x000 + (0x4 * (x)))
  89 #define SDW_ALH_NUM_STREAMS             64
  90
  91 #define SDW_ALH_STRMZCFG_DMAT_VAL       0x3
  92 #define SDW_ALH_STRMZCFG_DMAT           GENMASK(7, 0)
  93 #define SDW_ALH_STRMZCFG_CHN            GENMASK(19, 16)
  94
  95 #define SDW_INTEL_QUIRK_MASK_BUS_DISABLE        BIT(1)
  96
  97 enum intel_pdi_type {
  98         INTEL_PDI_IN = 0,
  99         INTEL_PDI_OUT = 1,
 100         INTEL_PDI_BD = 2,
 101 };
 102
 103 struct sdw_intel {
 104         struct sdw_cdns cdns;
 105         int instance;
 106         struct sdw_intel_link_res *res;
 107 #ifdef CONFIG_DEBUG_FS
 108         struct dentry *debugfs;
 109 #endif
 110 };
 111
 112 #define cdns_to_intel(_cdns) container_of(_cdns, struct sdw_intel, cdns)
 113
 114 /*
 115  * Read, write helpers for HW registers
 116  */
 117 static inline int intel_readl(void __iomem *base, int offset)
 118 {
 119         return readl(base + offset);
 120 }
 121
 122 static inline void intel_writel(void __iomem *base, int offset, int value)
 123 {
 124         writel(value, base + offset);
 125 }
 126
 127 static inline u16 intel_readw(void __iomem *base, int offset)
 128 {
 129         return readw(base + offset);
 130 }
 131
 132 static inline void intel_writew(void __iomem *base, int offset, u16 value)
 133 {
 134         writew(value, base + offset);
 135 }
 136
 137 static int intel_clear_bit(void __iomem *base, int offset, u32 value, u32 mask)
 138 {
 139         int timeout = 10;
 140         u32 reg_read;
 141
 142         writel(value, base + offset);
 143         do {
 144                 reg_read = readl(base + offset);
 145                 if (!(reg_read & mask))
 146                         return 0;
 147
 148                 timeout--;
 149                 udelay(50);
 150         } while (timeout != 0);
 151
 152         return -EAGAIN;
 153 }
 154
 155 static int intel_set_bit(void __iomem *base, int offset, u32 value, u32 mask)
 156 {
 157         int timeout = 10;
 158         u32 reg_read;
 159
 160         writel(value, base + offset);
 161         do {
 162                 reg_read = readl(base + offset);
 163                 if (reg_read & mask)
 164                         return 0;
 165
 166                 timeout--;
 167                 udelay(50);
 168         } while (timeout != 0);
 169
 170         return -EAGAIN;
 171 }
 172
 173 /*
 174  * debugfs
 175  */
 176 #ifdef CONFIG_DEBUG_FS
 177
 178 #define RD_BUF (2 * PAGE_SIZE)
 179
 180 static ssize_t intel_sprintf(void __iomem *mem, bool l,
 181                              char *buf, size_t pos, unsigned int reg)
 182 {
 183         int value;
 184
 185         if (l)
 186                 value = intel_readl(mem, reg);
 187         else
 188                 value = intel_readw(mem, reg);
 189
 190         return scnprintf(buf + pos, RD_BUF - pos, "%4x\t%4x\n", reg, value);
 191 }
 192
 193 static int intel_reg_show(struct seq_file *s_file, void *data)
 194 {
 195         struct sdw_intel *sdw = s_file->private;
 196         void __iomem *s = sdw->res->shim;
 197         void __iomem *a = sdw->res->alh;
 198         char *buf;
 199         ssize_t ret;
 200         int i, j;
 201         unsigned int links, reg;
 202
 203         buf = kzalloc(RD_BUF, GFP_KERNEL);
 204         if (!buf)
 205                 return -ENOMEM;
 206
 207         links = intel_readl(s, SDW_SHIM_LCAP) & GENMASK(2, 0);
 208
 209         ret = scnprintf(buf, RD_BUF, "Register  Value\n");
 210         ret += scnprintf(buf + ret, RD_BUF - ret, "\nShim\n");
 211
 212         for (i = 0; i < links; i++) {
 213                 reg = SDW_SHIM_LCAP + i * 4;
 214                 ret += intel_sprintf(s, true, buf, ret, reg);
 215         }
 216
 217         for (i = 0; i < links; i++) {
 218                 ret += scnprintf(buf + ret, RD_BUF - ret, "\nLink%d\n", i);
 219                 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLSCAP(i));
 220                 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS0CM(i));
 221                 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS1CM(i));
 222                 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS2CM(i));
 223                 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS3CM(i));
 224                 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_PCMSCAP(i));
 225
 226                 ret += scnprintf(buf + ret, RD_BUF - ret, "\n PCMSyCH registers\n");
 227
 228                 /*
 229                  * the value 10 is the number of PDIs. We will need a
 230                  * cleanup to remove hard-coded Intel configurations
 231                  * from cadence_master.c
 232                  */
 233                 for (j = 0; j < 10; j++) {
 234                         ret += intel_sprintf(s, false, buf, ret,
 235                                         SDW_SHIM_PCMSYCHM(i, j));
 236                         ret += intel_sprintf(s, false, buf, ret,
 237                                         SDW_SHIM_PCMSYCHC(i, j));
 238                 }
 239                 ret += scnprintf(buf + ret, RD_BUF - ret, "\n PDMSCAP, IOCTL, CTMCTL\n");
 240
 241                 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_PDMSCAP(i));
 242                 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_IOCTL(i));
 243                 ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTMCTL(i));
 244         }
 245
 246         ret += scnprintf(buf + ret, RD_BUF - ret, "\nWake registers\n");
 247         ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_WAKEEN);
 248         ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_WAKESTS);
 249
 250         ret += scnprintf(buf + ret, RD_BUF - ret, "\nALH STRMzCFG\n");
 251         for (i = 0; i < SDW_ALH_NUM_STREAMS; i++)
 252                 ret += intel_sprintf(a, true, buf, ret, SDW_ALH_STRMZCFG(i));
 253
 254         seq_printf(s_file, "%s", buf);
 255         kfree(buf);
 256
 257         return 0;
 258 }
 259 DEFINE_SHOW_ATTRIBUTE(intel_reg);
 260
 261 static void intel_debugfs_init(struct sdw_intel *sdw)
 262 {
 263         struct dentry *root = sdw->cdns.bus.debugfs;
 264
 265         if (!root)
 266                 return;
 267
 268         sdw->debugfs = debugfs_create_dir("intel-sdw", root);
 269
 270         debugfs_create_file("intel-registers", 0400, sdw->debugfs, sdw,
 271                             &intel_reg_fops);
 272
 273         sdw_cdns_debugfs_init(&sdw->cdns, sdw->debugfs);
 274 }
 275
 276 static void intel_debugfs_exit(struct sdw_intel *sdw)
 277 {
 278         debugfs_remove_recursive(sdw->debugfs);
 279 }
 280 #else
 281 static void intel_debugfs_init(struct sdw_intel *sdw) {}
 282 static void intel_debugfs_exit(struct sdw_intel *sdw) {}
 283 #endif /* CONFIG_DEBUG_FS */
 284
 285 /*
 286  * shim ops
 287  */
 288
 289 static int intel_link_power_up(struct sdw_intel *sdw)
 290 {
 291         unsigned int link_id = sdw->instance;
 292         void __iomem *shim = sdw->res->shim;
 293         int spa_mask, cpa_mask;
 294         int link_control, ret;
 295
 296         /* Link power up sequence */
 297         link_control = intel_readl(shim, SDW_SHIM_LCTL);
 298         spa_mask = (SDW_SHIM_LCTL_SPA << link_id);
 299         cpa_mask = (SDW_SHIM_LCTL_CPA << link_id);
 300         link_control |=  spa_mask;
 301
 302         ret = intel_set_bit(shim, SDW_SHIM_LCTL, link_control, cpa_mask);
 303         if (ret < 0)
 304                 return ret;
 305
 306         sdw->cdns.link_up = true;
 307         return 0;
 308 }
 309
 310 static int intel_shim_init(struct sdw_intel *sdw)
 311 {
 312         void __iomem *shim = sdw->res->shim;
 313         unsigned int link_id = sdw->instance;
 314         int sync_reg, ret;
 315         u16 ioctl = 0, act = 0;
 316
 317         /* Initialize Shim */
 318         ioctl |= SDW_SHIM_IOCTL_BKE;
 319         intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
 320
 321         ioctl |= SDW_SHIM_IOCTL_WPDD;
 322         intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
 323
 324         ioctl |= SDW_SHIM_IOCTL_DO;
 325         intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
 326
 327         ioctl |= SDW_SHIM_IOCTL_DOE;
 328         intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
 329
 330         /* Switch to MIP from Glue logic */
 331         ioctl = intel_readw(shim,  SDW_SHIM_IOCTL(link_id));
 332
 333         ioctl &= ~(SDW_SHIM_IOCTL_DOE);
 334         intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
 335
 336         ioctl &= ~(SDW_SHIM_IOCTL_DO);
 337         intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
 338
 339         ioctl |= (SDW_SHIM_IOCTL_MIF);
 340         intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
 341
 342         ioctl &= ~(SDW_SHIM_IOCTL_BKE);
 343         ioctl &= ~(SDW_SHIM_IOCTL_COE);
 344
 345         intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
 346
 347         act |= 0x1 << SDW_REG_SHIFT(SDW_SHIM_CTMCTL_DOAIS);
 348         act |= SDW_SHIM_CTMCTL_DACTQE;
 349         act |= SDW_SHIM_CTMCTL_DODS;
 350         intel_writew(shim, SDW_SHIM_CTMCTL(link_id), act);
 351
 352         /* Now set SyncPRD period */
 353         sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
 354         sync_reg |= (SDW_SHIM_SYNC_SYNCPRD_VAL <<
 355                         SDW_REG_SHIFT(SDW_SHIM_SYNC_SYNCPRD));
 356
 357         /* Set SyncCPU bit */
 358         sync_reg |= SDW_SHIM_SYNC_SYNCCPU;
 359         ret = intel_clear_bit(shim, SDW_SHIM_SYNC, sync_reg,
 360                               SDW_SHIM_SYNC_SYNCCPU);
 361         if (ret < 0)
 362                 dev_err(sdw->cdns.dev, "Failed to set sync period: %d\n", ret);
 363
 364         return ret;
 365 }
 366
 367 /*
 368  * PDI routines
 369  */
 370 static void intel_pdi_init(struct sdw_intel *sdw,
 371                            struct sdw_cdns_stream_config *config)
 372 {
 373         void __iomem *shim = sdw->res->shim;
 374         unsigned int link_id = sdw->instance;
 375         int pcm_cap, pdm_cap;
 376
 377         /* PCM Stream Capability */
 378         pcm_cap = intel_readw(shim, SDW_SHIM_PCMSCAP(link_id));
 379
 380         config->pcm_bd = (pcm_cap & SDW_SHIM_PCMSCAP_BSS) >>
 381                                         SDW_REG_SHIFT(SDW_SHIM_PCMSCAP_BSS);
 382         config->pcm_in = (pcm_cap & SDW_SHIM_PCMSCAP_ISS) >>
 383                                         SDW_REG_SHIFT(SDW_SHIM_PCMSCAP_ISS);
 384         config->pcm_out = (pcm_cap & SDW_SHIM_PCMSCAP_OSS) >>
 385                                         SDW_REG_SHIFT(SDW_SHIM_PCMSCAP_OSS);
 386
 387         dev_dbg(sdw->cdns.dev, "PCM cap bd:%d in:%d out:%d\n",
 388                 config->pcm_bd, config->pcm_in, config->pcm_out);
 389
 390         /* PDM Stream Capability */
 391         pdm_cap = intel_readw(shim, SDW_SHIM_PDMSCAP(link_id));
 392
 393         config->pdm_bd = (pdm_cap & SDW_SHIM_PDMSCAP_BSS) >>
 394                                         SDW_REG_SHIFT(SDW_SHIM_PDMSCAP_BSS);
 395         config->pdm_in = (pdm_cap & SDW_SHIM_PDMSCAP_ISS) >>
 396                                         SDW_REG_SHIFT(SDW_SHIM_PDMSCAP_ISS);
 397         config->pdm_out = (pdm_cap & SDW_SHIM_PDMSCAP_OSS) >>
 398                                         SDW_REG_SHIFT(SDW_SHIM_PDMSCAP_OSS);
 399
 400         dev_dbg(sdw->cdns.dev, "PDM cap bd:%d in:%d out:%d\n",
 401                 config->pdm_bd, config->pdm_in, config->pdm_out);
 402 }
 403
 404 static int
 405 intel_pdi_get_ch_cap(struct sdw_intel *sdw, unsigned int pdi_num, bool pcm)
 406 {
 407         void __iomem *shim = sdw->res->shim;
 408         unsigned int link_id = sdw->instance;
 409         int count;
 410
 411         if (pcm) {
 412                 count = intel_readw(shim, SDW_SHIM_PCMSYCHC(link_id, pdi_num));
 413
 414                 /*
 415                  * WORKAROUND: on all existing Intel controllers, pdi
 416                  * number 2 reports channel count as 1 even though it
 417                  * supports 8 channels. Performing hardcoding for pdi
 418                  * number 2.
 419                  */
 420                 if (pdi_num == 2)
 421                         count = 7;
 422
 423         } else {
 424                 count = intel_readw(shim, SDW_SHIM_PDMSCAP(link_id));
 425                 count = ((count & SDW_SHIM_PDMSCAP_CPSS) >>
 426                                         SDW_REG_SHIFT(SDW_SHIM_PDMSCAP_CPSS));
 427         }
 428
 429         /* zero based values for channel count in register */
 430         count++;
 431
 432         return count;
 433 }
 434
 435 static int intel_pdi_get_ch_update(struct sdw_intel *sdw,
 436                                    struct sdw_cdns_pdi *pdi,
 437                                    unsigned int num_pdi,
 438                                    unsigned int *num_ch, bool pcm)
 439 {
 440         int i, ch_count = 0;
 441
 442         for (i = 0; i < num_pdi; i++) {
 443                 pdi->ch_count = intel_pdi_get_ch_cap(sdw, pdi->num, pcm);
 444                 ch_count += pdi->ch_count;
 445                 pdi++;
 446         }
 447
 448         *num_ch = ch_count;
 449         return 0;
 450 }
 451
 452 static int intel_pdi_stream_ch_update(struct sdw_intel *sdw,
 453                                       struct sdw_cdns_streams *stream, bool pcm)
 454 {
 455         intel_pdi_get_ch_update(sdw, stream->bd, stream->num_bd,
 456                                 &stream->num_ch_bd, pcm);
 457
 458         intel_pdi_get_ch_update(sdw, stream->in, stream->num_in,
 459                                 &stream->num_ch_in, pcm);
 460
 461         intel_pdi_get_ch_update(sdw, stream->out, stream->num_out,
 462                                 &stream->num_ch_out, pcm);
 463
 464         return 0;
 465 }
 466
 467 static int intel_pdi_ch_update(struct sdw_intel *sdw)
 468 {
 469         /* First update PCM streams followed by PDM streams */
 470         intel_pdi_stream_ch_update(sdw, &sdw->cdns.pcm, true);
 471         intel_pdi_stream_ch_update(sdw, &sdw->cdns.pdm, false);
 472
 473         return 0;
 474 }
 475
 476 static void
 477 intel_pdi_shim_configure(struct sdw_intel *sdw, struct sdw_cdns_pdi *pdi)
 478 {
 479         void __iomem *shim = sdw->res->shim;
 480         unsigned int link_id = sdw->instance;
 481         int pdi_conf = 0;
 482
 483         pdi->intel_alh_id = (link_id * 16) + pdi->num + 5;
 484
 485         /*
 486          * Program stream parameters to stream SHIM register
 487          * This is applicable for PCM stream only.
 488          */
 489         if (pdi->type != SDW_STREAM_PCM)
 490                 return;
 491
 492         if (pdi->dir == SDW_DATA_DIR_RX)
 493                 pdi_conf |= SDW_SHIM_PCMSYCM_DIR;
 494         else
 495                 pdi_conf &= ~(SDW_SHIM_PCMSYCM_DIR);
 496
 497         pdi_conf |= (pdi->intel_alh_id <<
 498                         SDW_REG_SHIFT(SDW_SHIM_PCMSYCM_STREAM));
 499         pdi_conf |= (pdi->l_ch_num << SDW_REG_SHIFT(SDW_SHIM_PCMSYCM_LCHN));
 500         pdi_conf |= (pdi->h_ch_num << SDW_REG_SHIFT(SDW_SHIM_PCMSYCM_HCHN));
 501
 502         intel_writew(shim, SDW_SHIM_PCMSYCHM(link_id, pdi->num), pdi_conf);
 503 }
 504
 505 static void
 506 intel_pdi_alh_configure(struct sdw_intel *sdw, struct sdw_cdns_pdi *pdi)
 507 {
 508         void __iomem *alh = sdw->res->alh;
 509         unsigned int link_id = sdw->instance;
 510         unsigned int conf;
 511
 512         pdi->intel_alh_id = (link_id * 16) + pdi->num + 5;
 513
 514         /* Program Stream config ALH register */
 515         conf = intel_readl(alh, SDW_ALH_STRMZCFG(pdi->intel_alh_id));
 516
 517         conf |= (SDW_ALH_STRMZCFG_DMAT_VAL <<
 518                         SDW_REG_SHIFT(SDW_ALH_STRMZCFG_DMAT));
 519
 520         conf |= ((pdi->ch_count - 1) <<
 521                         SDW_REG_SHIFT(SDW_ALH_STRMZCFG_CHN));
 522
 523         intel_writel(alh, SDW_ALH_STRMZCFG(pdi->intel_alh_id), conf);
 524 }
 525
 526 static int intel_config_stream(struct sdw_intel *sdw,
 527                                struct snd_pcm_substream *substream,
 528                                struct snd_soc_dai *dai,
 529                                struct snd_pcm_hw_params *hw_params, int link_id)
 530 {
 531         struct sdw_intel_link_res *res = sdw->res;
 532
 533         if (res->ops && res->ops->config_stream && res->arg)
 534                 return res->ops->config_stream(res->arg,
 535                                 substream, dai, hw_params, link_id);
 536
 537         return -EIO;
 538 }
 539
 540 /*
 541  * bank switch routines
 542  */
 543
 544 static int intel_pre_bank_switch(struct sdw_bus *bus)
 545 {
 546         struct sdw_cdns *cdns = bus_to_cdns(bus);
 547         struct sdw_intel *sdw = cdns_to_intel(cdns);
 548         void __iomem *shim = sdw->res->shim;
 549         int sync_reg;
 550
 551         /* Write to register only for multi-link */
 552         if (!bus->multi_link)
 553                 return 0;
 554
 555         /* Read SYNC register */
 556         sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
 557         sync_reg |= SDW_SHIM_SYNC_CMDSYNC << sdw->instance;
 558         intel_writel(shim, SDW_SHIM_SYNC, sync_reg);
 559
 560         return 0;
 561 }
 562
 563 static int intel_post_bank_switch(struct sdw_bus *bus)
 564 {
 565         struct sdw_cdns *cdns = bus_to_cdns(bus);
 566         struct sdw_intel *sdw = cdns_to_intel(cdns);
 567         void __iomem *shim = sdw->res->shim;
 568         int sync_reg, ret;
 569
 570         /* Write to register only for multi-link */
 571         if (!bus->multi_link)
 572                 return 0;
 573
 574         /* Read SYNC register */
 575         sync_reg = intel_readl(shim, SDW_SHIM_SYNC);
 576
 577         /*
 578          * post_bank_switch() ops is called from the bus in loop for
 579          * all the Masters in the steam with the expectation that
 580          * we trigger the bankswitch for the only first Master in the list
 581          * and do nothing for the other Masters
 582          *
 583          * So, set the SYNCGO bit only if CMDSYNC bit is set for any Master.
 584          */
 585         if (!(sync_reg & SDW_SHIM_SYNC_CMDSYNC_MASK))
 586                 return 0;
 587
 588         /*
 589          * Set SyncGO bit to synchronously trigger a bank switch for
 590          * all the masters. A write to SYNCGO bit clears CMDSYNC bit for all
 591          * the Masters.
 592          */
 593         sync_reg |= SDW_SHIM_SYNC_SYNCGO;
 594
 595         ret = intel_clear_bit(shim, SDW_SHIM_SYNC, sync_reg,
 596                               SDW_SHIM_SYNC_SYNCGO);
 597         if (ret < 0)
 598                 dev_err(sdw->cdns.dev, "Post bank switch failed: %d\n", ret);
 599
 600         return ret;
 601 }
 602
 603 /*
 604  * DAI routines
 605  */
 606
 607 static struct sdw_cdns_port *intel_alloc_port(struct sdw_intel *sdw,
 608                                               u32 ch, u32 dir, bool pcm)
 609 {
 610         struct sdw_cdns *cdns = &sdw->cdns;
 611         struct sdw_cdns_port *port = NULL;
 612         int i, ret = 0;
 613
 614         for (i = 0; i < cdns->num_ports; i++) {
 615                 if (cdns->ports[i].assigned)
 616                         continue;
 617
 618                 port = &cdns->ports[i];
 619                 port->assigned = true;
 620                 port->direction = dir;
 621                 port->ch = ch;
 622                 break;
 623         }
 624
 625         if (!port) {
 626                 dev_err(cdns->dev, "Unable to find a free port\n");
 627                 return NULL;
 628         }
 629
 630         if (pcm) {
 631                 ret = sdw_cdns_alloc_stream(cdns, &cdns->pcm, port, ch, dir);
 632                 if (ret)
 633                         goto out;
 634
 635                 intel_pdi_shim_configure(sdw, port->pdi);
 636                 sdw_cdns_config_stream(cdns, port, ch, dir, port->pdi);
 637
 638                 intel_pdi_alh_configure(sdw, port->pdi);
 639
 640         } else {
 641                 ret = sdw_cdns_alloc_stream(cdns, &cdns->pdm, port, ch, dir);
 642         }
 643
 644 out:
 645         if (ret) {
 646                 port->assigned = false;
 647                 port = NULL;
 648         }
 649
 650         return port;
 651 }
 652
 653 static void intel_port_cleanup(struct sdw_cdns_dma_data *dma)
 654 {
 655         int i;
 656
 657         for (i = 0; i < dma->nr_ports; i++) {
 658                 if (dma->port[i]) {
 659                         dma->port[i]->pdi->assigned = false;
 660                         dma->port[i]->pdi = NULL;
 661                         dma->port[i]->assigned = false;
 662                         dma->port[i] = NULL;
 663                 }
 664         }
 665 }
 666
 667 static int intel_hw_params(struct snd_pcm_substream *substream,
 668                            struct snd_pcm_hw_params *params,
 669                            struct snd_soc_dai *dai)
 670 {
 671         struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
 672         struct sdw_intel *sdw = cdns_to_intel(cdns);
 673         struct sdw_cdns_dma_data *dma;
 674         struct sdw_stream_config sconfig;
 675         struct sdw_port_config *pconfig;
 676         int ret, i, ch, dir;
 677         bool pcm = true;
 678
 679         dma = snd_soc_dai_get_dma_data(dai, substream);
 680         if (!dma)
 681                 return -EIO;
 682
 683         ch = params_channels(params);
 684         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 685                 dir = SDW_DATA_DIR_RX;
 686         else
 687                 dir = SDW_DATA_DIR_TX;
 688
 689         if (dma->stream_type == SDW_STREAM_PDM) {
 690                 /* TODO: Check whether PDM decimator is already in use */
 691                 dma->nr_ports = sdw_cdns_get_stream(cdns, &cdns->pdm, ch, dir);
 692                 pcm = false;
 693         } else {
 694                 dma->nr_ports = sdw_cdns_get_stream(cdns, &cdns->pcm, ch, dir);
 695         }
 696
 697         if (!dma->nr_ports) {
 698                 dev_err(dai->dev, "ports/resources not available\n");
 699                 return -EINVAL;
 700         }
 701
 702         dma->port = kcalloc(dma->nr_ports, sizeof(*dma->port), GFP_KERNEL);
 703         if (!dma->port)
 704                 return -ENOMEM;
 705
 706         for (i = 0; i < dma->nr_ports; i++) {
 707                 dma->port[i] = intel_alloc_port(sdw, ch, dir, pcm);
 708                 if (!dma->port[i]) {
 709                         ret = -EINVAL;
 710                         goto port_error;
 711                 }
 712         }
 713
 714         /* Inform DSP about PDI stream number */
 715         for (i = 0; i < dma->nr_ports; i++) {
 716                 ret = intel_config_stream(sdw, substream, dai, params,
 717                                           dma->port[i]->pdi->intel_alh_id);
 718                 if (ret)
 719                         goto port_error;
 720         }
 721
 722         sconfig.direction = dir;
 723         sconfig.ch_count = ch;
 724         sconfig.frame_rate = params_rate(params);
 725         sconfig.type = dma->stream_type;
 726
 727         if (dma->stream_type == SDW_STREAM_PDM) {
 728                 sconfig.frame_rate *= 50;
 729                 sconfig.bps = 1;
 730         } else {
 731                 sconfig.bps = snd_pcm_format_width(params_format(params));
 732         }
 733
 734         /* Port configuration */
 735         pconfig = kcalloc(dma->nr_ports, sizeof(*pconfig), GFP_KERNEL);
 736         if (!pconfig) {
 737                 ret =  -ENOMEM;
 738                 goto port_error;
 739         }
 740
 741         for (i = 0; i < dma->nr_ports; i++) {
 742                 pconfig[i].num = dma->port[i]->num;
 743                 pconfig[i].ch_mask = (1 << ch) - 1;
 744         }
 745
 746         ret = sdw_stream_add_master(&cdns->bus, &sconfig,
 747                                     pconfig, dma->nr_ports, dma->stream);
 748         if (ret) {
 749                 dev_err(cdns->dev, "add master to stream failed:%d\n", ret);
 750                 goto stream_error;
 751         }
 752
 753         kfree(pconfig);
 754         return ret;
 755
 756 stream_error:
 757         kfree(pconfig);
 758 port_error:
 759         intel_port_cleanup(dma);
 760         kfree(dma->port);
 761         return ret;
 762 }
 763
 764 static int
 765 intel_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
 766 {
 767         struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
 768         struct sdw_cdns_dma_data *dma;
 769         int ret;
 770
 771         dma = snd_soc_dai_get_dma_data(dai, substream);
 772         if (!dma)
 773                 return -EIO;
 774
 775         ret = sdw_stream_remove_master(&cdns->bus, dma->stream);
 776         if (ret < 0)
 777                 dev_err(dai->dev, "remove master from stream %s failed: %d\n",
 778                         dma->stream->name, ret);
 779
 780         intel_port_cleanup(dma);
 781         kfree(dma->port);
 782         return ret;
 783 }
 784
 785 static void intel_shutdown(struct snd_pcm_substream *substream,
 786                            struct snd_soc_dai *dai)
 787 {
 788         struct sdw_cdns_dma_data *dma;
 789
 790         dma = snd_soc_dai_get_dma_data(dai, substream);
 791         if (!dma)
 792                 return;
 793
 794         snd_soc_dai_set_dma_data(dai, substream, NULL);
 795         kfree(dma);
 796 }
 797
 798 static int intel_pcm_set_sdw_stream(struct snd_soc_dai *dai,
 799                                     void *stream, int direction)
 800 {
 801         return cdns_set_sdw_stream(dai, stream, true, direction);
 802 }
 803
 804 static int intel_pdm_set_sdw_stream(struct snd_soc_dai *dai,
 805                                     void *stream, int direction)
 806 {
 807         return cdns_set_sdw_stream(dai, stream, false, direction);
 808 }
 809
 810 static const struct snd_soc_dai_ops intel_pcm_dai_ops = {
 811         .hw_params = intel_hw_params,
 812         .hw_free = intel_hw_free,
 813         .shutdown = intel_shutdown,
 814         .set_sdw_stream = intel_pcm_set_sdw_stream,
 815 };
 816
 817 static const struct snd_soc_dai_ops intel_pdm_dai_ops = {
 818         .hw_params = intel_hw_params,
 819         .hw_free = intel_hw_free,
 820         .shutdown = intel_shutdown,
 821         .set_sdw_stream = intel_pdm_set_sdw_stream,
 822 };
 823
 824 static const struct snd_soc_component_driver dai_component = {
 825         .name           = "soundwire",
 826 };
 827
 828 static int intel_create_dai(struct sdw_cdns *cdns,
 829                             struct snd_soc_dai_driver *dais,
 830                             enum intel_pdi_type type,
 831                             u32 num, u32 off, u32 max_ch, bool pcm)
 832 {
 833         int i;
 834
 835         if (num == 0)
 836                 return 0;
 837
 838          /* TODO: Read supported rates/formats from hardware */
 839         for (i = off; i < (off + num); i++) {
 840                 dais[i].name = kasprintf(GFP_KERNEL, "SDW%d Pin%d",
 841                                          cdns->instance, i);
 842                 if (!dais[i].name)
 843                         return -ENOMEM;
 844
 845                 if (type == INTEL_PDI_BD || type == INTEL_PDI_OUT) {
 846                         dais[i].playback.stream_name =
 847                                 kasprintf(GFP_KERNEL, "SDW%d Tx%d",
 848                                           cdns->instance, i);
 849                         if (!dais[i].playback.stream_name) {
 850                                 kfree(dais[i].name);
 851                                 return -ENOMEM;
 852                         }
 853
 854                         dais[i].playback.channels_min = 1;
 855                         dais[i].playback.channels_max = max_ch;
 856                         dais[i].playback.rates = SNDRV_PCM_RATE_48000;
 857                         dais[i].playback.formats = SNDRV_PCM_FMTBIT_S16_LE;
 858                 }
 859
 860                 if (type == INTEL_PDI_BD || type == INTEL_PDI_IN) {
 861                         dais[i].capture.stream_name =
 862                                 kasprintf(GFP_KERNEL, "SDW%d Rx%d",
 863                                           cdns->instance, i);
 864                         if (!dais[i].capture.stream_name) {
 865                                 kfree(dais[i].name);
 866                                 kfree(dais[i].playback.stream_name);
 867                                 return -ENOMEM;
 868                         }
 869
 870                         dais[i].capture.channels_min = 1;
 871                         dais[i].capture.channels_max = max_ch;
 872                         dais[i].capture.rates = SNDRV_PCM_RATE_48000;
 873                         dais[i].capture.formats = SNDRV_PCM_FMTBIT_S16_LE;
 874                 }
 875
 876                 dais[i].id = SDW_DAI_ID_RANGE_START + i;
 877
 878                 if (pcm)
 879                         dais[i].ops = &intel_pcm_dai_ops;
 880                 else
 881                         dais[i].ops = &intel_pdm_dai_ops;
 882         }
 883
 884         return 0;
 885 }
 886
 887 static int intel_register_dai(struct sdw_intel *sdw)
 888 {
 889         struct sdw_cdns *cdns = &sdw->cdns;
 890         struct sdw_cdns_streams *stream;
 891         struct snd_soc_dai_driver *dais;
 892         int num_dai, ret, off = 0;
 893
 894         /* DAIs are created based on total number of PDIs supported */
 895         num_dai = cdns->pcm.num_pdi + cdns->pdm.num_pdi;
 896
 897         dais = devm_kcalloc(cdns->dev, num_dai, sizeof(*dais), GFP_KERNEL);
 898         if (!dais)
 899                 return -ENOMEM;
 900
 901         /* Create PCM DAIs */
 902         stream = &cdns->pcm;
 903
 904         ret = intel_create_dai(cdns, dais, INTEL_PDI_IN, stream->num_in,
 905                                off, stream->num_ch_in, true);
 906         if (ret)
 907                 return ret;
 908
 909         off += cdns->pcm.num_in;
 910         ret = intel_create_dai(cdns, dais, INTEL_PDI_OUT, cdns->pcm.num_out,
 911                                off, stream->num_ch_out, true);
 912         if (ret)
 913                 return ret;
 914
 915         off += cdns->pcm.num_out;
 916         ret = intel_create_dai(cdns, dais, INTEL_PDI_BD, cdns->pcm.num_bd,
 917                                off, stream->num_ch_bd, true);
 918         if (ret)
 919                 return ret;
 920
 921         /* Create PDM DAIs */
 922         stream = &cdns->pdm;
 923         off += cdns->pcm.num_bd;
 924         ret = intel_create_dai(cdns, dais, INTEL_PDI_IN, cdns->pdm.num_in,
 925                                off, stream->num_ch_in, false);
 926         if (ret)
 927                 return ret;
 928
 929         off += cdns->pdm.num_in;
 930         ret = intel_create_dai(cdns, dais, INTEL_PDI_OUT, cdns->pdm.num_out,
 931                                off, stream->num_ch_out, false);
 932         if (ret)
 933                 return ret;
 934
 935         off += cdns->pdm.num_bd;
 936         ret = intel_create_dai(cdns, dais, INTEL_PDI_BD, cdns->pdm.num_bd,
 937                                off, stream->num_ch_bd, false);
 938         if (ret)
 939                 return ret;
 940
 941         return snd_soc_register_component(cdns->dev, &dai_component,
 942                                           dais, num_dai);
 943 }
 944
 945 static int sdw_master_read_intel_prop(struct sdw_bus *bus)
 946 {
 947         struct sdw_master_prop *prop = &bus->prop;
 948         struct fwnode_handle *link;
 949         char name[32];
 950         u32 quirk_mask;
 951
 952         /* Find master handle */
 953         snprintf(name, sizeof(name),
 954                  "mipi-sdw-link-%d-subproperties", bus->link_id);
 955
 956         link = device_get_named_child_node(bus->dev, name);
 957         if (!link) {
 958                 dev_err(bus->dev, "Master node %s not found\n", name);
 959                 return -EIO;
 960         }
 961
 962         fwnode_property_read_u32(link,
 963                                  "intel-sdw-ip-clock",
 964                                  &prop->mclk_freq);
 965
 966         fwnode_property_read_u32(link,
 967                                  "intel-quirk-mask",
 968                                  &quirk_mask);
 969
 970         if (quirk_mask & SDW_INTEL_QUIRK_MASK_BUS_DISABLE)
 971                 prop->hw_disabled = true;
 972
 973         return 0;
 974 }
 975
 976 static int intel_prop_read(struct sdw_bus *bus)
 977 {
 978         /* Initialize with default handler to read all DisCo properties */
 979         sdw_master_read_prop(bus);
 980
 981         /* read Intel-specific properties */
 982         sdw_master_read_intel_prop(bus);
 983
 984         return 0;
 985 }
 986
 987 static struct sdw_master_ops sdw_intel_ops = {
 988         .read_prop = sdw_master_read_prop,
 989         .xfer_msg = cdns_xfer_msg,
 990         .xfer_msg_defer = cdns_xfer_msg_defer,
 991         .reset_page_addr = cdns_reset_page_addr,
 992         .set_bus_conf = cdns_bus_conf,
 993         .pre_bank_switch = intel_pre_bank_switch,
 994         .post_bank_switch = intel_post_bank_switch,
 995 };
 996
 997 /*
 998  * probe and init
 999  */
1000 static int intel_probe(struct platform_device *pdev)
1001 {
1002         struct sdw_cdns_stream_config config;
1003         struct sdw_intel *sdw;
1004         int ret;
1005
1006         sdw = devm_kzalloc(&pdev->dev, sizeof(*sdw), GFP_KERNEL);
1007         if (!sdw)
1008                 return -ENOMEM;
1009
1010         sdw->instance = pdev->id;
1011         sdw->res = dev_get_platdata(&pdev->dev);
1012         sdw->cdns.dev = &pdev->dev;
1013         sdw->cdns.registers = sdw->res->registers;
1014         sdw->cdns.instance = sdw->instance;
1015         sdw->cdns.msg_count = 0;
1016         sdw->cdns.bus.dev = &pdev->dev;
1017         sdw->cdns.bus.link_id = pdev->id;
1018
1019         sdw_cdns_probe(&sdw->cdns);
1020
1021         /* Set property read ops */
1022         sdw_intel_ops.read_prop = intel_prop_read;
1023         sdw->cdns.bus.ops = &sdw_intel_ops;
1024
1025         platform_set_drvdata(pdev, sdw);
1026
1027         ret = sdw_add_bus_master(&sdw->cdns.bus);
1028         if (ret) {
1029                 dev_err(&pdev->dev, "sdw_add_bus_master fail: %d\n", ret);
1030                 goto err_master_reg;
1031         }
1032
1033         if (sdw->cdns.bus.prop.hw_disabled) {
1034                 dev_info(&pdev->dev, "SoundWire master %d is disabled, ignoring\n",
1035                          sdw->cdns.bus.link_id);
1036                 return 0;
1037         }
1038
1039         /* Initialize shim and controller */
1040         intel_link_power_up(sdw);
1041         intel_shim_init(sdw);
1042
1043         ret = sdw_cdns_init(&sdw->cdns);
1044         if (ret)
1045                 goto err_init;
1046
1047         ret = sdw_cdns_enable_interrupt(&sdw->cdns);
1048
1049         /* Read the PDI config and initialize cadence PDI */
1050         intel_pdi_init(sdw, &config);
1051         ret = sdw_cdns_pdi_init(&sdw->cdns, config);
1052         if (ret)
1053                 goto err_init;
1054
1055         intel_pdi_ch_update(sdw);
1056
1057         /* Acquire IRQ */
1058         ret = request_threaded_irq(sdw->res->irq, sdw_cdns_irq, sdw_cdns_thread,
1059                                    IRQF_SHARED, KBUILD_MODNAME, &sdw->cdns);
1060         if (ret < 0) {
1061                 dev_err(sdw->cdns.dev, "unable to grab IRQ %d, disabling device\n",
1062                         sdw->res->irq);
1063                 goto err_init;
1064         }
1065
1066         /* Register DAIs */
1067         ret = intel_register_dai(sdw);
1068         if (ret) {
1069                 dev_err(sdw->cdns.dev, "DAI registration failed: %d\n", ret);
1070                 snd_soc_unregister_component(sdw->cdns.dev);
1071                 goto err_dai;
1072         }
1073
1074         intel_debugfs_init(sdw);
1075
1076         return 0;
1077
1078 err_dai:
1079         free_irq(sdw->res->irq, sdw);
1080 err_init:
1081         sdw_delete_bus_master(&sdw->cdns.bus);
1082 err_master_reg:
1083         return ret;
1084 }
1085
1086 static int intel_remove(struct platform_device *pdev)
1087 {
1088         struct sdw_intel *sdw;
1089
1090         sdw = platform_get_drvdata(pdev);
1091
1092         if (!sdw->cdns.bus.prop.hw_disabled) {
1093                 intel_debugfs_exit(sdw);
1094                 free_irq(sdw->res->irq, sdw);
1095                 snd_soc_unregister_component(sdw->cdns.dev);
1096         }
1097         sdw_delete_bus_master(&sdw->cdns.bus);
1098
1099         return 0;
1100 }
1101
1102 static struct platform_driver sdw_intel_drv = {
1103         .probe = intel_probe,
1104         .remove = intel_remove,
1105         .driver = {
1106                 .name = "int-sdw",
1107
1108         },
1109 };
1110
1111 module_platform_driver(sdw_intel_drv);
1112
1113 MODULE_LICENSE("Dual BSD/GPL");
1114 MODULE_ALIAS("platform:int-sdw");
1115 MODULE_DESCRIPTION("Intel Soundwire Master Driver");