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