drivers/soundwire/cadence_master.c

   1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
   2 // Copyright(c) 2015-17 Intel Corporation.
   3
   4 /*
   5  * Cadence SoundWire Master module
   6  * Used by Master driver
   7  */
   8
   9 #include <linux/delay.h>
  10 #include <linux/device.h>
  11 #include <linux/debugfs.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/io.h>
  14 #include <linux/module.h>
  15 #include <linux/mod_devicetable.h>
  16 #include <linux/pm_runtime.h>
  17 #include <linux/soundwire/sdw_registers.h>
  18 #include <linux/soundwire/sdw.h>
  19 #include <sound/pcm_params.h>
  20 #include <sound/soc.h>
  21 #include <linux/workqueue.h>
  22 #include "bus.h"
  23 #include "cadence_master.h"
  24
  25 static int interrupt_mask;
  26 module_param_named(cnds_mcp_int_mask, interrupt_mask, int, 0444);
  27 MODULE_PARM_DESC(cdns_mcp_int_mask, "Cadence MCP IntMask");
  28
  29 #define CDNS_MCP_CONFIG                         0x0
  30
  31 #define CDNS_MCP_CONFIG_MCMD_RETRY              GENMASK(27, 24)
  32 #define CDNS_MCP_CONFIG_MPREQ_DELAY             GENMASK(20, 16)
  33 #define CDNS_MCP_CONFIG_MMASTER                 BIT(7)
  34 #define CDNS_MCP_CONFIG_BUS_REL                 BIT(6)
  35 #define CDNS_MCP_CONFIG_SNIFFER                 BIT(5)
  36 #define CDNS_MCP_CONFIG_SSPMOD                  BIT(4)
  37 #define CDNS_MCP_CONFIG_CMD                     BIT(3)
  38 #define CDNS_MCP_CONFIG_OP                      GENMASK(2, 0)
  39 #define CDNS_MCP_CONFIG_OP_NORMAL               0
  40
  41 #define CDNS_MCP_CONTROL                        0x4
  42
  43 #define CDNS_MCP_CONTROL_RST_DELAY              GENMASK(10, 8)
  44 #define CDNS_MCP_CONTROL_CMD_RST                BIT(7)
  45 #define CDNS_MCP_CONTROL_SOFT_RST               BIT(6)
  46 #define CDNS_MCP_CONTROL_SW_RST                 BIT(5)
  47 #define CDNS_MCP_CONTROL_HW_RST                 BIT(4)
  48 #define CDNS_MCP_CONTROL_CLK_PAUSE              BIT(3)
  49 #define CDNS_MCP_CONTROL_CLK_STOP_CLR           BIT(2)
  50 #define CDNS_MCP_CONTROL_CMD_ACCEPT             BIT(1)
  51 #define CDNS_MCP_CONTROL_BLOCK_WAKEUP           BIT(0)
  52
  53 #define CDNS_MCP_CMDCTRL                        0x8
  54
  55 #define CDNS_MCP_CMDCTRL_INSERT_PARITY_ERR      BIT(2)
  56
  57 #define CDNS_MCP_SSPSTAT                        0xC
  58 #define CDNS_MCP_FRAME_SHAPE                    0x10
  59 #define CDNS_MCP_FRAME_SHAPE_INIT               0x14
  60 #define CDNS_MCP_FRAME_SHAPE_COL_MASK           GENMASK(2, 0)
  61 #define CDNS_MCP_FRAME_SHAPE_ROW_MASK           GENMASK(7, 3)
  62
  63 #define CDNS_MCP_CONFIG_UPDATE                  0x18
  64 #define CDNS_MCP_CONFIG_UPDATE_BIT              BIT(0)
  65
  66 #define CDNS_MCP_PHYCTRL                        0x1C
  67 #define CDNS_MCP_SSP_CTRL0                      0x20
  68 #define CDNS_MCP_SSP_CTRL1                      0x28
  69 #define CDNS_MCP_CLK_CTRL0                      0x30
  70 #define CDNS_MCP_CLK_CTRL1                      0x38
  71 #define CDNS_MCP_CLK_MCLKD_MASK         GENMASK(7, 0)
  72
  73 #define CDNS_MCP_STAT                           0x40
  74
  75 #define CDNS_MCP_STAT_ACTIVE_BANK               BIT(20)
  76 #define CDNS_MCP_STAT_CLK_STOP                  BIT(16)
  77
  78 #define CDNS_MCP_INTSTAT                        0x44
  79 #define CDNS_MCP_INTMASK                        0x48
  80
  81 #define CDNS_MCP_INT_IRQ                        BIT(31)
  82 #define CDNS_MCP_INT_RESERVED1                  GENMASK(30, 17)
  83 #define CDNS_MCP_INT_WAKEUP                     BIT(16)
  84 #define CDNS_MCP_INT_SLAVE_RSVD                 BIT(15)
  85 #define CDNS_MCP_INT_SLAVE_ALERT                BIT(14)
  86 #define CDNS_MCP_INT_SLAVE_ATTACH               BIT(13)
  87 #define CDNS_MCP_INT_SLAVE_NATTACH              BIT(12)
  88 #define CDNS_MCP_INT_SLAVE_MASK                 GENMASK(15, 12)
  89 #define CDNS_MCP_INT_DPINT                      BIT(11)
  90 #define CDNS_MCP_INT_CTRL_CLASH                 BIT(10)
  91 #define CDNS_MCP_INT_DATA_CLASH                 BIT(9)
  92 #define CDNS_MCP_INT_PARITY                     BIT(8)
  93 #define CDNS_MCP_INT_CMD_ERR                    BIT(7)
  94 #define CDNS_MCP_INT_RESERVED2                  GENMASK(6, 4)
  95 #define CDNS_MCP_INT_RX_NE                      BIT(3)
  96 #define CDNS_MCP_INT_RX_WL                      BIT(2)
  97 #define CDNS_MCP_INT_TXE                        BIT(1)
  98 #define CDNS_MCP_INT_TXF                        BIT(0)
  99 #define CDNS_MCP_INT_RESERVED (CDNS_MCP_INT_RESERVED1 | CDNS_MCP_INT_RESERVED2)
 100
 101 #define CDNS_MCP_INTSET                         0x4C
 102
 103 #define CDNS_MCP_SLAVE_STAT                     0x50
 104 #define CDNS_MCP_SLAVE_STAT_MASK                GENMASK(1, 0)
 105
 106 #define CDNS_MCP_SLAVE_INTSTAT0                 0x54
 107 #define CDNS_MCP_SLAVE_INTSTAT1                 0x58
 108 #define CDNS_MCP_SLAVE_INTSTAT_NPRESENT         BIT(0)
 109 #define CDNS_MCP_SLAVE_INTSTAT_ATTACHED         BIT(1)
 110 #define CDNS_MCP_SLAVE_INTSTAT_ALERT            BIT(2)
 111 #define CDNS_MCP_SLAVE_INTSTAT_RESERVED         BIT(3)
 112 #define CDNS_MCP_SLAVE_STATUS_BITS              GENMASK(3, 0)
 113 #define CDNS_MCP_SLAVE_STATUS_NUM               4
 114
 115 #define CDNS_MCP_SLAVE_INTMASK0                 0x5C
 116 #define CDNS_MCP_SLAVE_INTMASK1                 0x60
 117
 118 #define CDNS_MCP_SLAVE_INTMASK0_MASK            GENMASK(31, 0)
 119 #define CDNS_MCP_SLAVE_INTMASK1_MASK            GENMASK(15, 0)
 120
 121 #define CDNS_MCP_PORT_INTSTAT                   0x64
 122 #define CDNS_MCP_PDI_STAT                       0x6C
 123
 124 #define CDNS_MCP_FIFOLEVEL                      0x78
 125 #define CDNS_MCP_FIFOSTAT                       0x7C
 126 #define CDNS_MCP_RX_FIFO_AVAIL                  GENMASK(5, 0)
 127
 128 #define CDNS_MCP_CMD_BASE                       0x80
 129 #define CDNS_MCP_RESP_BASE                      0x80
 130 #define CDNS_MCP_CMD_LEN                        0x20
 131 #define CDNS_MCP_CMD_WORD_LEN                   0x4
 132
 133 #define CDNS_MCP_CMD_SSP_TAG                    BIT(31)
 134 #define CDNS_MCP_CMD_COMMAND                    GENMASK(30, 28)
 135 #define CDNS_MCP_CMD_DEV_ADDR                   GENMASK(27, 24)
 136 #define CDNS_MCP_CMD_REG_ADDR                   GENMASK(23, 8)
 137 #define CDNS_MCP_CMD_REG_DATA                   GENMASK(7, 0)
 138
 139 #define CDNS_MCP_CMD_READ                       2
 140 #define CDNS_MCP_CMD_WRITE                      3
 141
 142 #define CDNS_MCP_RESP_RDATA                     GENMASK(15, 8)
 143 #define CDNS_MCP_RESP_ACK                       BIT(0)
 144 #define CDNS_MCP_RESP_NACK                      BIT(1)
 145
 146 #define CDNS_DP_SIZE                            128
 147
 148 #define CDNS_DPN_B0_CONFIG(n)                   (0x100 + CDNS_DP_SIZE * (n))
 149 #define CDNS_DPN_B0_CH_EN(n)                    (0x104 + CDNS_DP_SIZE * (n))
 150 #define CDNS_DPN_B0_SAMPLE_CTRL(n)              (0x108 + CDNS_DP_SIZE * (n))
 151 #define CDNS_DPN_B0_OFFSET_CTRL(n)              (0x10C + CDNS_DP_SIZE * (n))
 152 #define CDNS_DPN_B0_HCTRL(n)                    (0x110 + CDNS_DP_SIZE * (n))
 153 #define CDNS_DPN_B0_ASYNC_CTRL(n)               (0x114 + CDNS_DP_SIZE * (n))
 154
 155 #define CDNS_DPN_B1_CONFIG(n)                   (0x118 + CDNS_DP_SIZE * (n))
 156 #define CDNS_DPN_B1_CH_EN(n)                    (0x11C + CDNS_DP_SIZE * (n))
 157 #define CDNS_DPN_B1_SAMPLE_CTRL(n)              (0x120 + CDNS_DP_SIZE * (n))
 158 #define CDNS_DPN_B1_OFFSET_CTRL(n)              (0x124 + CDNS_DP_SIZE * (n))
 159 #define CDNS_DPN_B1_HCTRL(n)                    (0x128 + CDNS_DP_SIZE * (n))
 160 #define CDNS_DPN_B1_ASYNC_CTRL(n)               (0x12C + CDNS_DP_SIZE * (n))
 161
 162 #define CDNS_DPN_CONFIG_BPM                     BIT(18)
 163 #define CDNS_DPN_CONFIG_BGC                     GENMASK(17, 16)
 164 #define CDNS_DPN_CONFIG_WL                      GENMASK(12, 8)
 165 #define CDNS_DPN_CONFIG_PORT_DAT                GENMASK(3, 2)
 166 #define CDNS_DPN_CONFIG_PORT_FLOW               GENMASK(1, 0)
 167
 168 #define CDNS_DPN_SAMPLE_CTRL_SI                 GENMASK(15, 0)
 169
 170 #define CDNS_DPN_OFFSET_CTRL_1                  GENMASK(7, 0)
 171 #define CDNS_DPN_OFFSET_CTRL_2                  GENMASK(15, 8)
 172
 173 #define CDNS_DPN_HCTRL_HSTOP                    GENMASK(3, 0)
 174 #define CDNS_DPN_HCTRL_HSTART                   GENMASK(7, 4)
 175 #define CDNS_DPN_HCTRL_LCTRL                    GENMASK(10, 8)
 176
 177 #define CDNS_PORTCTRL                           0x130
 178 #define CDNS_PORTCTRL_TEST_FAILED               BIT(1)
 179 #define CDNS_PORTCTRL_DIRN                      BIT(7)
 180 #define CDNS_PORTCTRL_BANK_INVERT               BIT(8)
 181
 182 #define CDNS_PORT_OFFSET                        0x80
 183
 184 #define CDNS_PDI_CONFIG(n)                      (0x1100 + (n) * 16)
 185
 186 #define CDNS_PDI_CONFIG_SOFT_RESET              BIT(24)
 187 #define CDNS_PDI_CONFIG_CHANNEL                 GENMASK(15, 8)
 188 #define CDNS_PDI_CONFIG_PORT                    GENMASK(4, 0)
 189
 190 /* Driver defaults */
 191 #define CDNS_TX_TIMEOUT                         2000
 192
 193 #define CDNS_SCP_RX_FIFOLEVEL                   0x2
 194
 195 /*
 196  * register accessor helpers
 197  */
 198 static inline u32 cdns_readl(struct sdw_cdns *cdns, int offset)
 199 {
 200         return readl(cdns->registers + offset);
 201 }
 202
 203 static inline void cdns_writel(struct sdw_cdns *cdns, int offset, u32 value)
 204 {
 205         writel(value, cdns->registers + offset);
 206 }
 207
 208 static inline void cdns_updatel(struct sdw_cdns *cdns,
 209                                 int offset, u32 mask, u32 val)
 210 {
 211         u32 tmp;
 212
 213         tmp = cdns_readl(cdns, offset);
 214         tmp = (tmp & ~mask) | val;
 215         cdns_writel(cdns, offset, tmp);
 216 }
 217
 218 static int cdns_set_wait(struct sdw_cdns *cdns, int offset, u32 mask, u32 value)
 219 {
 220         int timeout = 10;
 221         u32 reg_read;
 222
 223         /* Wait for bit to be set */
 224         do {
 225                 reg_read = readl(cdns->registers + offset);
 226                 if ((reg_read & mask) == value)
 227                         return 0;
 228
 229                 timeout--;
 230                 usleep_range(50, 100);
 231         } while (timeout != 0);
 232
 233         return -ETIMEDOUT;
 234 }
 235
 236 static int cdns_clear_bit(struct sdw_cdns *cdns, int offset, u32 value)
 237 {
 238         writel(value, cdns->registers + offset);
 239
 240         /* Wait for bit to be self cleared */
 241         return cdns_set_wait(cdns, offset, value, 0);
 242 }
 243
 244 /*
 245  * all changes to the MCP_CONFIG, MCP_CONTROL, MCP_CMDCTRL and MCP_PHYCTRL
 246  * need to be confirmed with a write to MCP_CONFIG_UPDATE
 247  */
 248 static int cdns_config_update(struct sdw_cdns *cdns)
 249 {
 250         int ret;
 251
 252         if (sdw_cdns_is_clock_stop(cdns)) {
 253                 dev_err(cdns->dev, "Cannot program MCP_CONFIG_UPDATE in ClockStopMode\n");
 254                 return -EINVAL;
 255         }
 256
 257         ret = cdns_clear_bit(cdns, CDNS_MCP_CONFIG_UPDATE,
 258                              CDNS_MCP_CONFIG_UPDATE_BIT);
 259         if (ret < 0)
 260                 dev_err(cdns->dev, "Config update timedout\n");
 261
 262         return ret;
 263 }
 264
 265 /*
 266  * debugfs
 267  */
 268 #ifdef CONFIG_DEBUG_FS
 269
 270 #define RD_BUF (2 * PAGE_SIZE)
 271
 272 static ssize_t cdns_sprintf(struct sdw_cdns *cdns,
 273                             char *buf, size_t pos, unsigned int reg)
 274 {
 275         return scnprintf(buf + pos, RD_BUF - pos,
 276                          "%4x\t%8x\n", reg, cdns_readl(cdns, reg));
 277 }
 278
 279 static int cdns_reg_show(struct seq_file *s, void *data)
 280 {
 281         struct sdw_cdns *cdns = s->private;
 282         char *buf;
 283         ssize_t ret;
 284         int num_ports;
 285         int i, j;
 286
 287         buf = kzalloc(RD_BUF, GFP_KERNEL);
 288         if (!buf)
 289                 return -ENOMEM;
 290
 291         ret = scnprintf(buf, RD_BUF, "Register  Value\n");
 292         ret += scnprintf(buf + ret, RD_BUF - ret, "\nMCP Registers\n");
 293         /* 8 MCP registers */
 294         for (i = CDNS_MCP_CONFIG; i <= CDNS_MCP_PHYCTRL; i += sizeof(u32))
 295                 ret += cdns_sprintf(cdns, buf, ret, i);
 296
 297         ret += scnprintf(buf + ret, RD_BUF - ret,
 298                          "\nStatus & Intr Registers\n");
 299         /* 13 Status & Intr registers (offsets 0x70 and 0x74 not defined) */
 300         for (i = CDNS_MCP_STAT; i <=  CDNS_MCP_FIFOSTAT; i += sizeof(u32))
 301                 ret += cdns_sprintf(cdns, buf, ret, i);
 302
 303         ret += scnprintf(buf + ret, RD_BUF - ret,
 304                          "\nSSP & Clk ctrl Registers\n");
 305         ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_SSP_CTRL0);
 306         ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_SSP_CTRL1);
 307         ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_CLK_CTRL0);
 308         ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_CLK_CTRL1);
 309
 310         ret += scnprintf(buf + ret, RD_BUF - ret,
 311                          "\nDPn B0 Registers\n");
 312
 313         num_ports = cdns->num_ports;
 314
 315         for (i = 0; i < num_ports; i++) {
 316                 ret += scnprintf(buf + ret, RD_BUF - ret,
 317                                  "\nDP-%d\n", i);
 318                 for (j = CDNS_DPN_B0_CONFIG(i);
 319                      j < CDNS_DPN_B0_ASYNC_CTRL(i); j += sizeof(u32))
 320                         ret += cdns_sprintf(cdns, buf, ret, j);
 321         }
 322
 323         ret += scnprintf(buf + ret, RD_BUF - ret,
 324                          "\nDPn B1 Registers\n");
 325         for (i = 0; i < num_ports; i++) {
 326                 ret += scnprintf(buf + ret, RD_BUF - ret,
 327                                  "\nDP-%d\n", i);
 328
 329                 for (j = CDNS_DPN_B1_CONFIG(i);
 330                      j < CDNS_DPN_B1_ASYNC_CTRL(i); j += sizeof(u32))
 331                         ret += cdns_sprintf(cdns, buf, ret, j);
 332         }
 333
 334         ret += scnprintf(buf + ret, RD_BUF - ret,
 335                          "\nDPn Control Registers\n");
 336         for (i = 0; i < num_ports; i++)
 337                 ret += cdns_sprintf(cdns, buf, ret,
 338                                 CDNS_PORTCTRL + i * CDNS_PORT_OFFSET);
 339
 340         ret += scnprintf(buf + ret, RD_BUF - ret,
 341                          "\nPDIn Config Registers\n");
 342
 343         /* number of PDI and ports is interchangeable */
 344         for (i = 0; i < num_ports; i++)
 345                 ret += cdns_sprintf(cdns, buf, ret, CDNS_PDI_CONFIG(i));
 346
 347         seq_printf(s, "%s", buf);
 348         kfree(buf);
 349
 350         return 0;
 351 }
 352 DEFINE_SHOW_ATTRIBUTE(cdns_reg);
 353
 354 static int cdns_hw_reset(void *data, u64 value)
 355 {
 356         struct sdw_cdns *cdns = data;
 357         int ret;
 358
 359         if (value != 1)
 360                 return -EINVAL;
 361
 362         /* Userspace changed the hardware state behind the kernel's back */
 363         add_taint(TAINT_USER, LOCKDEP_STILL_OK);
 364
 365         ret = sdw_cdns_exit_reset(cdns);
 366
 367         dev_dbg(cdns->dev, "link hw_reset done: %d\n", ret);
 368
 369         return ret;
 370 }
 371
 372 DEFINE_DEBUGFS_ATTRIBUTE(cdns_hw_reset_fops, NULL, cdns_hw_reset, "%llu\n");
 373
 374 static int cdns_parity_error_injection(void *data, u64 value)
 375 {
 376         struct sdw_cdns *cdns = data;
 377         struct sdw_bus *bus;
 378         int ret;
 379
 380         if (value != 1)
 381                 return -EINVAL;
 382
 383         bus = &cdns->bus;
 384
 385         /*
 386          * Resume Master device. If this results in a bus reset, the
 387          * Slave devices will re-attach and be re-enumerated.
 388          */
 389         ret = pm_runtime_get_sync(bus->dev);
 390         if (ret < 0 && ret != -EACCES) {
 391                 dev_err_ratelimited(cdns->dev,
 392                                     "pm_runtime_get_sync failed in %s, ret %d\n",
 393                                     __func__, ret);
 394                 pm_runtime_put_noidle(bus->dev);
 395                 return ret;
 396         }
 397
 398         /*
 399          * wait long enough for Slave(s) to be in steady state. This
 400          * does not need to be super precise.
 401          */
 402         msleep(200);
 403
 404         /*
 405          * Take the bus lock here to make sure that any bus transactions
 406          * will be queued while we inject a parity error on a dummy read
 407          */
 408         mutex_lock(&bus->bus_lock);
 409
 410         /* program hardware to inject parity error */
 411         cdns_updatel(cdns, CDNS_MCP_CMDCTRL,
 412                      CDNS_MCP_CMDCTRL_INSERT_PARITY_ERR,
 413                      CDNS_MCP_CMDCTRL_INSERT_PARITY_ERR);
 414
 415         /* commit changes */
 416         cdns_updatel(cdns, CDNS_MCP_CONFIG_UPDATE,
 417                      CDNS_MCP_CONFIG_UPDATE_BIT,
 418                      CDNS_MCP_CONFIG_UPDATE_BIT);
 419
 420         /* do a broadcast dummy read to avoid bus clashes */
 421         ret = sdw_bread_no_pm_unlocked(&cdns->bus, 0xf, SDW_SCP_DEVID_0);
 422         dev_info(cdns->dev, "parity error injection, read: %d\n", ret);
 423
 424         /* program hardware to disable parity error */
 425         cdns_updatel(cdns, CDNS_MCP_CMDCTRL,
 426                      CDNS_MCP_CMDCTRL_INSERT_PARITY_ERR,
 427                      0);
 428
 429         /* commit changes */
 430         cdns_updatel(cdns, CDNS_MCP_CONFIG_UPDATE,
 431                      CDNS_MCP_CONFIG_UPDATE_BIT,
 432                      CDNS_MCP_CONFIG_UPDATE_BIT);
 433
 434         /* Continue bus operation with parity error injection disabled */
 435         mutex_unlock(&bus->bus_lock);
 436
 437         /* Userspace changed the hardware state behind the kernel's back */
 438         add_taint(TAINT_USER, LOCKDEP_STILL_OK);
 439
 440         /*
 441          * allow Master device to enter pm_runtime suspend. This may
 442          * also result in Slave devices suspending.
 443          */
 444         pm_runtime_mark_last_busy(bus->dev);
 445         pm_runtime_put_autosuspend(bus->dev);
 446
 447         return 0;
 448 }
 449
 450 DEFINE_DEBUGFS_ATTRIBUTE(cdns_parity_error_fops, NULL,
 451                          cdns_parity_error_injection, "%llu\n");
 452
 453 /**
 454  * sdw_cdns_debugfs_init() - Cadence debugfs init
 455  * @cdns: Cadence instance
 456  * @root: debugfs root
 457  */
 458 void sdw_cdns_debugfs_init(struct sdw_cdns *cdns, struct dentry *root)
 459 {
 460         debugfs_create_file("cdns-registers", 0400, root, cdns, &cdns_reg_fops);
 461
 462         debugfs_create_file("cdns-hw-reset", 0200, root, cdns,
 463                             &cdns_hw_reset_fops);
 464
 465         debugfs_create_file("cdns-parity-error-injection", 0200, root, cdns,
 466                             &cdns_parity_error_fops);
 467 }
 468 EXPORT_SYMBOL_GPL(sdw_cdns_debugfs_init);
 469
 470 #endif /* CONFIG_DEBUG_FS */
 471
 472 /*
 473  * IO Calls
 474  */
 475 static enum sdw_command_response
 476 cdns_fill_msg_resp(struct sdw_cdns *cdns,
 477                    struct sdw_msg *msg, int count, int offset)
 478 {
 479         int nack = 0, no_ack = 0;
 480         int i;
 481
 482         /* check message response */
 483         for (i = 0; i < count; i++) {
 484                 if (!(cdns->response_buf[i] & CDNS_MCP_RESP_ACK)) {
 485                         no_ack = 1;
 486                         dev_dbg_ratelimited(cdns->dev, "Msg Ack not received\n");
 487                         if (cdns->response_buf[i] & CDNS_MCP_RESP_NACK) {
 488                                 nack = 1;
 489                                 dev_err_ratelimited(cdns->dev, "Msg NACK received\n");
 490                         }
 491                 }
 492         }
 493
 494         if (nack) {
 495                 dev_err_ratelimited(cdns->dev, "Msg NACKed for Slave %d\n", msg->dev_num);
 496                 return SDW_CMD_FAIL;
 497         }
 498
 499         if (no_ack) {
 500                 dev_dbg_ratelimited(cdns->dev, "Msg ignored for Slave %d\n", msg->dev_num);
 501                 return SDW_CMD_IGNORED;
 502         }
 503
 504         /* fill response */
 505         for (i = 0; i < count; i++)
 506                 msg->buf[i + offset] = FIELD_GET(CDNS_MCP_RESP_RDATA, cdns->response_buf[i]);
 507
 508         return SDW_CMD_OK;
 509 }
 510
 511 static enum sdw_command_response
 512 _cdns_xfer_msg(struct sdw_cdns *cdns, struct sdw_msg *msg, int cmd,
 513                int offset, int count, bool defer)
 514 {
 515         unsigned long time;
 516         u32 base, i, data;
 517         u16 addr;
 518
 519         /* Program the watermark level for RX FIFO */
 520         if (cdns->msg_count != count) {
 521                 cdns_writel(cdns, CDNS_MCP_FIFOLEVEL, count);
 522                 cdns->msg_count = count;
 523         }
 524
 525         base = CDNS_MCP_CMD_BASE;
 526         addr = msg->addr;
 527
 528         for (i = 0; i < count; i++) {
 529                 data = FIELD_PREP(CDNS_MCP_CMD_DEV_ADDR, msg->dev_num);
 530                 data |= FIELD_PREP(CDNS_MCP_CMD_COMMAND, cmd);
 531                 data |= FIELD_PREP(CDNS_MCP_CMD_REG_ADDR, addr);
 532                 addr++;
 533
 534                 if (msg->flags == SDW_MSG_FLAG_WRITE)
 535                         data |= msg->buf[i + offset];
 536
 537                 data |= FIELD_PREP(CDNS_MCP_CMD_SSP_TAG, msg->ssp_sync);
 538                 cdns_writel(cdns, base, data);
 539                 base += CDNS_MCP_CMD_WORD_LEN;
 540         }
 541
 542         if (defer)
 543                 return SDW_CMD_OK;
 544
 545         /* wait for timeout or response */
 546         time = wait_for_completion_timeout(&cdns->tx_complete,
 547                                            msecs_to_jiffies(CDNS_TX_TIMEOUT));
 548         if (!time) {
 549                 dev_err(cdns->dev, "IO transfer timed out, cmd %d device %d addr %x len %d\n",
 550                         cmd, msg->dev_num, msg->addr, msg->len);
 551                 msg->len = 0;
 552                 return SDW_CMD_TIMEOUT;
 553         }
 554
 555         return cdns_fill_msg_resp(cdns, msg, count, offset);
 556 }
 557
 558 static enum sdw_command_response
 559 cdns_program_scp_addr(struct sdw_cdns *cdns, struct sdw_msg *msg)
 560 {
 561         int nack = 0, no_ack = 0;
 562         unsigned long time;
 563         u32 data[2], base;
 564         int i;
 565
 566         /* Program the watermark level for RX FIFO */
 567         if (cdns->msg_count != CDNS_SCP_RX_FIFOLEVEL) {
 568                 cdns_writel(cdns, CDNS_MCP_FIFOLEVEL, CDNS_SCP_RX_FIFOLEVEL);
 569                 cdns->msg_count = CDNS_SCP_RX_FIFOLEVEL;
 570         }
 571
 572         data[0] = FIELD_PREP(CDNS_MCP_CMD_DEV_ADDR, msg->dev_num);
 573         data[0] |= FIELD_PREP(CDNS_MCP_CMD_COMMAND, 0x3);
 574         data[1] = data[0];
 575
 576         data[0] |= FIELD_PREP(CDNS_MCP_CMD_REG_ADDR, SDW_SCP_ADDRPAGE1);
 577         data[1] |= FIELD_PREP(CDNS_MCP_CMD_REG_ADDR, SDW_SCP_ADDRPAGE2);
 578
 579         data[0] |= msg->addr_page1;
 580         data[1] |= msg->addr_page2;
 581
 582         base = CDNS_MCP_CMD_BASE;
 583         cdns_writel(cdns, base, data[0]);
 584         base += CDNS_MCP_CMD_WORD_LEN;
 585         cdns_writel(cdns, base, data[1]);
 586
 587         time = wait_for_completion_timeout(&cdns->tx_complete,
 588                                            msecs_to_jiffies(CDNS_TX_TIMEOUT));
 589         if (!time) {
 590                 dev_err(cdns->dev, "SCP Msg trf timed out\n");
 591                 msg->len = 0;
 592                 return SDW_CMD_TIMEOUT;
 593         }
 594
 595         /* check response the writes */
 596         for (i = 0; i < 2; i++) {
 597                 if (!(cdns->response_buf[i] & CDNS_MCP_RESP_ACK)) {
 598                         no_ack = 1;
 599                         dev_err(cdns->dev, "Program SCP Ack not received\n");
 600                         if (cdns->response_buf[i] & CDNS_MCP_RESP_NACK) {
 601                                 nack = 1;
 602                                 dev_err(cdns->dev, "Program SCP NACK received\n");
 603                         }
 604                 }
 605         }
 606
 607         /* For NACK, NO ack, don't return err if we are in Broadcast mode */
 608         if (nack) {
 609                 dev_err_ratelimited(cdns->dev,
 610                                     "SCP_addrpage NACKed for Slave %d\n", msg->dev_num);
 611                 return SDW_CMD_FAIL;
 612         }
 613
 614         if (no_ack) {
 615                 dev_dbg_ratelimited(cdns->dev,
 616                                     "SCP_addrpage ignored for Slave %d\n", msg->dev_num);
 617                 return SDW_CMD_IGNORED;
 618         }
 619
 620         return SDW_CMD_OK;
 621 }
 622
 623 static int cdns_prep_msg(struct sdw_cdns *cdns, struct sdw_msg *msg, int *cmd)
 624 {
 625         int ret;
 626
 627         if (msg->page) {
 628                 ret = cdns_program_scp_addr(cdns, msg);
 629                 if (ret) {
 630                         msg->len = 0;
 631                         return ret;
 632                 }
 633         }
 634
 635         switch (msg->flags) {
 636         case SDW_MSG_FLAG_READ:
 637                 *cmd = CDNS_MCP_CMD_READ;
 638                 break;
 639
 640         case SDW_MSG_FLAG_WRITE:
 641                 *cmd = CDNS_MCP_CMD_WRITE;
 642                 break;
 643
 644         default:
 645                 dev_err(cdns->dev, "Invalid msg cmd: %d\n", msg->flags);
 646                 return -EINVAL;
 647         }
 648
 649         return 0;
 650 }
 651
 652 enum sdw_command_response
 653 cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg)
 654 {
 655         struct sdw_cdns *cdns = bus_to_cdns(bus);
 656         int cmd = 0, ret, i;
 657
 658         ret = cdns_prep_msg(cdns, msg, &cmd);
 659         if (ret)
 660                 return SDW_CMD_FAIL_OTHER;
 661
 662         for (i = 0; i < msg->len / CDNS_MCP_CMD_LEN; i++) {
 663                 ret = _cdns_xfer_msg(cdns, msg, cmd, i * CDNS_MCP_CMD_LEN,
 664                                      CDNS_MCP_CMD_LEN, false);
 665                 if (ret < 0)
 666                         goto exit;
 667         }
 668
 669         if (!(msg->len % CDNS_MCP_CMD_LEN))
 670                 goto exit;
 671
 672         ret = _cdns_xfer_msg(cdns, msg, cmd, i * CDNS_MCP_CMD_LEN,
 673                              msg->len % CDNS_MCP_CMD_LEN, false);
 674
 675 exit:
 676         return ret;
 677 }
 678 EXPORT_SYMBOL(cdns_xfer_msg);
 679
 680 enum sdw_command_response
 681 cdns_xfer_msg_defer(struct sdw_bus *bus,
 682                     struct sdw_msg *msg, struct sdw_defer *defer)
 683 {
 684         struct sdw_cdns *cdns = bus_to_cdns(bus);
 685         int cmd = 0, ret;
 686
 687         /* for defer only 1 message is supported */
 688         if (msg->len > 1)
 689                 return -ENOTSUPP;
 690
 691         ret = cdns_prep_msg(cdns, msg, &cmd);
 692         if (ret)
 693                 return SDW_CMD_FAIL_OTHER;
 694
 695         cdns->defer = defer;
 696         cdns->defer->length = msg->len;
 697
 698         return _cdns_xfer_msg(cdns, msg, cmd, 0, msg->len, true);
 699 }
 700 EXPORT_SYMBOL(cdns_xfer_msg_defer);
 701
 702 enum sdw_command_response
 703 cdns_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num)
 704 {
 705         struct sdw_cdns *cdns = bus_to_cdns(bus);
 706         struct sdw_msg msg;
 707
 708         /* Create dummy message with valid device number */
 709         memset(&msg, 0, sizeof(msg));
 710         msg.dev_num = dev_num;
 711
 712         return cdns_program_scp_addr(cdns, &msg);
 713 }
 714 EXPORT_SYMBOL(cdns_reset_page_addr);
 715
 716 /*
 717  * IRQ handling
 718  */
 719
 720 static void cdns_read_response(struct sdw_cdns *cdns)
 721 {
 722         u32 num_resp, cmd_base;
 723         int i;
 724
 725         num_resp = cdns_readl(cdns, CDNS_MCP_FIFOSTAT);
 726         num_resp &= CDNS_MCP_RX_FIFO_AVAIL;
 727
 728         cmd_base = CDNS_MCP_CMD_BASE;
 729
 730         for (i = 0; i < num_resp; i++) {
 731                 cdns->response_buf[i] = cdns_readl(cdns, cmd_base);
 732                 cmd_base += CDNS_MCP_CMD_WORD_LEN;
 733         }
 734 }
 735
 736 static int cdns_update_slave_status(struct sdw_cdns *cdns,
 737                                     u32 slave0, u32 slave1)
 738 {
 739         enum sdw_slave_status status[SDW_MAX_DEVICES + 1];
 740         bool is_slave = false;
 741         u64 slave;
 742         u32 mask;
 743         int i, set_status;
 744
 745         /* combine the two status */
 746         slave = ((u64)slave1 << 32) | slave0;
 747         memset(status, 0, sizeof(status));
 748
 749         for (i = 0; i <= SDW_MAX_DEVICES; i++) {
 750                 mask = (slave >> (i * CDNS_MCP_SLAVE_STATUS_NUM)) &
 751                                 CDNS_MCP_SLAVE_STATUS_BITS;
 752                 if (!mask)
 753                         continue;
 754
 755                 is_slave = true;
 756                 set_status = 0;
 757
 758                 if (mask & CDNS_MCP_SLAVE_INTSTAT_RESERVED) {
 759                         status[i] = SDW_SLAVE_RESERVED;
 760                         set_status++;
 761                 }
 762
 763                 if (mask & CDNS_MCP_SLAVE_INTSTAT_ATTACHED) {
 764                         status[i] = SDW_SLAVE_ATTACHED;
 765                         set_status++;
 766                 }
 767
 768                 if (mask & CDNS_MCP_SLAVE_INTSTAT_ALERT) {
 769                         status[i] = SDW_SLAVE_ALERT;
 770                         set_status++;
 771                 }
 772
 773                 if (mask & CDNS_MCP_SLAVE_INTSTAT_NPRESENT) {
 774                         status[i] = SDW_SLAVE_UNATTACHED;
 775                         set_status++;
 776                 }
 777
 778                 /* first check if Slave reported multiple status */
 779                 if (set_status > 1) {
 780                         u32 val;
 781
 782                         dev_warn_ratelimited(cdns->dev,
 783                                              "Slave %d reported multiple Status: %d\n",
 784                                              i, mask);
 785
 786                         /* check latest status extracted from PING commands */
 787                         val = cdns_readl(cdns, CDNS_MCP_SLAVE_STAT);
 788                         val >>= (i * 2);
 789
 790                         switch (val & 0x3) {
 791                         case 0:
 792                                 status[i] = SDW_SLAVE_UNATTACHED;
 793                                 break;
 794                         case 1:
 795                                 status[i] = SDW_SLAVE_ATTACHED;
 796                                 break;
 797                         case 2:
 798                                 status[i] = SDW_SLAVE_ALERT;
 799                                 break;
 800                         case 3:
 801                         default:
 802                                 status[i] = SDW_SLAVE_RESERVED;
 803                                 break;
 804                         }
 805
 806                         dev_warn_ratelimited(cdns->dev,
 807                                              "Slave %d status updated to %d\n",
 808                                              i, status[i]);
 809
 810                 }
 811         }
 812
 813         if (is_slave)
 814                 return sdw_handle_slave_status(&cdns->bus, status);
 815
 816         return 0;
 817 }
 818
 819 /**
 820  * sdw_cdns_irq() - Cadence interrupt handler
 821  * @irq: irq number
 822  * @dev_id: irq context
 823  */
 824 irqreturn_t sdw_cdns_irq(int irq, void *dev_id)
 825 {
 826         struct sdw_cdns *cdns = dev_id;
 827         u32 int_status;
 828         int ret = IRQ_HANDLED;
 829
 830         /* Check if the link is up */
 831         if (!cdns->link_up)
 832                 return IRQ_NONE;
 833
 834         int_status = cdns_readl(cdns, CDNS_MCP_INTSTAT);
 835
 836         /* check for reserved values read as zero */
 837         if (int_status & CDNS_MCP_INT_RESERVED)
 838                 return IRQ_NONE;
 839
 840         if (!(int_status & CDNS_MCP_INT_IRQ))
 841                 return IRQ_NONE;
 842
 843         if (int_status & CDNS_MCP_INT_RX_WL) {
 844                 cdns_read_response(cdns);
 845
 846                 if (cdns->defer) {
 847                         cdns_fill_msg_resp(cdns, cdns->defer->msg,
 848                                            cdns->defer->length, 0);
 849                         complete(&cdns->defer->complete);
 850                         cdns->defer = NULL;
 851                 } else {
 852                         complete(&cdns->tx_complete);
 853                 }
 854         }
 855
 856         if (int_status & CDNS_MCP_INT_PARITY) {
 857                 /* Parity error detected by Master */
 858                 dev_err_ratelimited(cdns->dev, "Parity error\n");
 859         }
 860
 861         if (int_status & CDNS_MCP_INT_CTRL_CLASH) {
 862                 /* Slave is driving bit slot during control word */
 863                 dev_err_ratelimited(cdns->dev, "Bus clash for control word\n");
 864         }
 865
 866         if (int_status & CDNS_MCP_INT_DATA_CLASH) {
 867                 /*
 868                  * Multiple slaves trying to drive bit slot, or issue with
 869                  * ownership of data bits or Slave gone bonkers
 870                  */
 871                 dev_err_ratelimited(cdns->dev, "Bus clash for data word\n");
 872         }
 873
 874         if (cdns->bus.params.m_data_mode != SDW_PORT_DATA_MODE_NORMAL &&
 875             int_status & CDNS_MCP_INT_DPINT) {
 876                 u32 port_intstat;
 877
 878                 /* just log which ports report an error */
 879                 port_intstat = cdns_readl(cdns, CDNS_MCP_PORT_INTSTAT);
 880                 dev_err_ratelimited(cdns->dev, "DP interrupt: PortIntStat %8x\n",
 881                                     port_intstat);
 882
 883                 /* clear status w/ write1 */
 884                 cdns_writel(cdns, CDNS_MCP_PORT_INTSTAT, port_intstat);
 885         }
 886
 887         if (int_status & CDNS_MCP_INT_SLAVE_MASK) {
 888                 /* Mask the Slave interrupt and wake thread */
 889                 cdns_updatel(cdns, CDNS_MCP_INTMASK,
 890                              CDNS_MCP_INT_SLAVE_MASK, 0);
 891
 892                 int_status &= ~CDNS_MCP_INT_SLAVE_MASK;
 893
 894                 /*
 895                  * Deal with possible race condition between interrupt
 896                  * handling and disabling interrupts on suspend.
 897                  *
 898                  * If the master is in the process of disabling
 899                  * interrupts, don't schedule a workqueue
 900                  */
 901                 if (cdns->interrupt_enabled)
 902                         schedule_work(&cdns->work);
 903         }
 904
 905         cdns_writel(cdns, CDNS_MCP_INTSTAT, int_status);
 906         return ret;
 907 }
 908 EXPORT_SYMBOL(sdw_cdns_irq);
 909
 910 /**
 911  * To update slave status in a work since we will need to handle
 912  * other interrupts eg. CDNS_MCP_INT_RX_WL during the update slave
 913  * process.
 914  * @work: cdns worker thread
 915  */
 916 static void cdns_update_slave_status_work(struct work_struct *work)
 917 {
 918         struct sdw_cdns *cdns =
 919                 container_of(work, struct sdw_cdns, work);
 920         u32 slave0, slave1;
 921
 922         dev_dbg_ratelimited(cdns->dev, "Slave status change\n");
 923
 924         slave0 = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT0);
 925         slave1 = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT1);
 926
 927         cdns_update_slave_status(cdns, slave0, slave1);
 928         cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT0, slave0);
 929         cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT1, slave1);
 930
 931         /* clear and unmask Slave interrupt now */
 932         cdns_writel(cdns, CDNS_MCP_INTSTAT, CDNS_MCP_INT_SLAVE_MASK);
 933         cdns_updatel(cdns, CDNS_MCP_INTMASK,
 934                      CDNS_MCP_INT_SLAVE_MASK, CDNS_MCP_INT_SLAVE_MASK);
 935
 936 }
 937
 938 /*
 939  * init routines
 940  */
 941
 942 /**
 943  * sdw_cdns_exit_reset() - Program reset parameters and start bus operations
 944  * @cdns: Cadence instance
 945  */
 946 int sdw_cdns_exit_reset(struct sdw_cdns *cdns)
 947 {
 948         /* program maximum length reset to be safe */
 949         cdns_updatel(cdns, CDNS_MCP_CONTROL,
 950                      CDNS_MCP_CONTROL_RST_DELAY,
 951                      CDNS_MCP_CONTROL_RST_DELAY);
 952
 953         /* use hardware generated reset */
 954         cdns_updatel(cdns, CDNS_MCP_CONTROL,
 955                      CDNS_MCP_CONTROL_HW_RST,
 956                      CDNS_MCP_CONTROL_HW_RST);
 957
 958         /* commit changes */
 959         cdns_updatel(cdns, CDNS_MCP_CONFIG_UPDATE,
 960                      CDNS_MCP_CONFIG_UPDATE_BIT,
 961                      CDNS_MCP_CONFIG_UPDATE_BIT);
 962
 963         /* don't wait here */
 964         return 0;
 965
 966 }
 967 EXPORT_SYMBOL(sdw_cdns_exit_reset);
 968
 969 /**
 970  * sdw_cdns_enable_slave_interrupt() - Enable SDW slave interrupts
 971  * @cdns: Cadence instance
 972  * @state: boolean for true/false
 973  */
 974 static void cdns_enable_slave_interrupts(struct sdw_cdns *cdns, bool state)
 975 {
 976         u32 mask;
 977
 978         mask = cdns_readl(cdns, CDNS_MCP_INTMASK);
 979         if (state)
 980                 mask |= CDNS_MCP_INT_SLAVE_MASK;
 981         else
 982                 mask &= ~CDNS_MCP_INT_SLAVE_MASK;
 983
 984         cdns_writel(cdns, CDNS_MCP_INTMASK, mask);
 985 }
 986
 987 /**
 988  * sdw_cdns_enable_interrupt() - Enable SDW interrupts
 989  * @cdns: Cadence instance
 990  * @state: True if we are trying to enable interrupt.
 991  */
 992 int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns, bool state)
 993 {
 994         u32 slave_intmask0 = 0;
 995         u32 slave_intmask1 = 0;
 996         u32 mask = 0;
 997
 998         if (!state)
 999                 goto update_masks;
1000
1001         slave_intmask0 = CDNS_MCP_SLAVE_INTMASK0_MASK;
1002         slave_intmask1 = CDNS_MCP_SLAVE_INTMASK1_MASK;
1003
1004         /* enable detection of all slave state changes */
1005         mask = CDNS_MCP_INT_SLAVE_MASK;
1006
1007         /* enable detection of bus issues */
1008         mask |= CDNS_MCP_INT_CTRL_CLASH | CDNS_MCP_INT_DATA_CLASH |
1009                 CDNS_MCP_INT_PARITY;
1010
1011         /* port interrupt limited to test modes for now */
1012         if (cdns->bus.params.m_data_mode != SDW_PORT_DATA_MODE_NORMAL)
1013                 mask |= CDNS_MCP_INT_DPINT;
1014
1015         /* enable detection of RX fifo level */
1016         mask |= CDNS_MCP_INT_RX_WL;
1017
1018         /*
1019          * CDNS_MCP_INT_IRQ needs to be set otherwise all previous
1020          * settings are irrelevant
1021          */
1022         mask |= CDNS_MCP_INT_IRQ;
1023
1024         if (interrupt_mask) /* parameter override */
1025                 mask = interrupt_mask;
1026
1027 update_masks:
1028         /* clear slave interrupt status before enabling interrupt */
1029         if (state) {
1030                 u32 slave_state;
1031
1032                 slave_state = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT0);
1033                 cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT0, slave_state);
1034                 slave_state = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT1);
1035                 cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT1, slave_state);
1036         }
1037         cdns->interrupt_enabled = state;
1038
1039         /*
1040          * Complete any on-going status updates before updating masks,
1041          * and cancel queued status updates.
1042          *
1043          * There could be a race with a new interrupt thrown before
1044          * the 3 mask updates below are complete, so in the interrupt
1045          * we use the 'interrupt_enabled' status to prevent new work
1046          * from being queued.
1047          */
1048         if (!state)
1049                 cancel_work_sync(&cdns->work);
1050
1051         cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK0, slave_intmask0);
1052         cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK1, slave_intmask1);
1053         cdns_writel(cdns, CDNS_MCP_INTMASK, mask);
1054
1055         return 0;
1056 }
1057 EXPORT_SYMBOL(sdw_cdns_enable_interrupt);
1058
1059 static int cdns_allocate_pdi(struct sdw_cdns *cdns,
1060                              struct sdw_cdns_pdi **stream,
1061                              u32 num, u32 pdi_offset)
1062 {
1063         struct sdw_cdns_pdi *pdi;
1064         int i;
1065
1066         if (!num)
1067                 return 0;
1068
1069         pdi = devm_kcalloc(cdns->dev, num, sizeof(*pdi), GFP_KERNEL);
1070         if (!pdi)
1071                 return -ENOMEM;
1072
1073         for (i = 0; i < num; i++) {
1074                 pdi[i].num = i + pdi_offset;
1075         }
1076
1077         *stream = pdi;
1078         return 0;
1079 }
1080
1081 /**
1082  * sdw_cdns_pdi_init() - PDI initialization routine
1083  *
1084  * @cdns: Cadence instance
1085  * @config: Stream configurations
1086  */
1087 int sdw_cdns_pdi_init(struct sdw_cdns *cdns,
1088                       struct sdw_cdns_stream_config config)
1089 {
1090         struct sdw_cdns_streams *stream;
1091         int offset;
1092         int ret;
1093
1094         cdns->pcm.num_bd = config.pcm_bd;
1095         cdns->pcm.num_in = config.pcm_in;
1096         cdns->pcm.num_out = config.pcm_out;
1097         cdns->pdm.num_bd = config.pdm_bd;
1098         cdns->pdm.num_in = config.pdm_in;
1099         cdns->pdm.num_out = config.pdm_out;
1100
1101         /* Allocate PDIs for PCMs */
1102         stream = &cdns->pcm;
1103
1104         /* we allocate PDI0 and PDI1 which are used for Bulk */
1105         offset = 0;
1106
1107         ret = cdns_allocate_pdi(cdns, &stream->bd,
1108                                 stream->num_bd, offset);
1109         if (ret)
1110                 return ret;
1111
1112         offset += stream->num_bd;
1113
1114         ret = cdns_allocate_pdi(cdns, &stream->in,
1115                                 stream->num_in, offset);
1116         if (ret)
1117                 return ret;
1118
1119         offset += stream->num_in;
1120
1121         ret = cdns_allocate_pdi(cdns, &stream->out,
1122                                 stream->num_out, offset);
1123         if (ret)
1124                 return ret;
1125
1126         /* Update total number of PCM PDIs */
1127         stream->num_pdi = stream->num_bd + stream->num_in + stream->num_out;
1128         cdns->num_ports = stream->num_pdi;
1129
1130         /* Allocate PDIs for PDMs */
1131         stream = &cdns->pdm;
1132         ret = cdns_allocate_pdi(cdns, &stream->bd,
1133                                 stream->num_bd, offset);
1134         if (ret)
1135                 return ret;
1136
1137         offset += stream->num_bd;
1138
1139         ret = cdns_allocate_pdi(cdns, &stream->in,
1140                                 stream->num_in, offset);
1141         if (ret)
1142                 return ret;
1143
1144         offset += stream->num_in;
1145
1146         ret = cdns_allocate_pdi(cdns, &stream->out,
1147                                 stream->num_out, offset);
1148
1149         if (ret)
1150                 return ret;
1151
1152         /* Update total number of PDM PDIs */
1153         stream->num_pdi = stream->num_bd + stream->num_in + stream->num_out;
1154         cdns->num_ports += stream->num_pdi;
1155
1156         return 0;
1157 }
1158 EXPORT_SYMBOL(sdw_cdns_pdi_init);
1159
1160 static u32 cdns_set_initial_frame_shape(int n_rows, int n_cols)
1161 {
1162         u32 val;
1163         int c;
1164         int r;
1165
1166         r = sdw_find_row_index(n_rows);
1167         c = sdw_find_col_index(n_cols);
1168
1169         val = FIELD_PREP(CDNS_MCP_FRAME_SHAPE_ROW_MASK, r);
1170         val |= FIELD_PREP(CDNS_MCP_FRAME_SHAPE_COL_MASK, c);
1171
1172         return val;
1173 }
1174
1175 static void cdns_init_clock_ctrl(struct sdw_cdns *cdns)
1176 {
1177         struct sdw_bus *bus = &cdns->bus;
1178         struct sdw_master_prop *prop = &bus->prop;
1179         u32 val;
1180         u32 ssp_interval;
1181         int divider;
1182
1183         /* Set clock divider */
1184         divider = (prop->mclk_freq / prop->max_clk_freq) - 1;
1185
1186         cdns_updatel(cdns, CDNS_MCP_CLK_CTRL0,
1187                      CDNS_MCP_CLK_MCLKD_MASK, divider);
1188         cdns_updatel(cdns, CDNS_MCP_CLK_CTRL1,
1189                      CDNS_MCP_CLK_MCLKD_MASK, divider);
1190
1191         /*
1192          * Frame shape changes after initialization have to be done
1193          * with the bank switch mechanism
1194          */
1195         val = cdns_set_initial_frame_shape(prop->default_row,
1196                                            prop->default_col);
1197         cdns_writel(cdns, CDNS_MCP_FRAME_SHAPE_INIT, val);
1198
1199         /* Set SSP interval to default value */
1200         ssp_interval = prop->default_frame_rate / SDW_CADENCE_GSYNC_HZ;
1201         cdns_writel(cdns, CDNS_MCP_SSP_CTRL0, ssp_interval);
1202         cdns_writel(cdns, CDNS_MCP_SSP_CTRL1, ssp_interval);
1203 }
1204
1205 /**
1206  * sdw_cdns_init() - Cadence initialization
1207  * @cdns: Cadence instance
1208  */
1209 int sdw_cdns_init(struct sdw_cdns *cdns)
1210 {
1211         u32 val;
1212
1213         cdns_init_clock_ctrl(cdns);
1214
1215         /* reset msg_count to default value of FIFOLEVEL */
1216         cdns->msg_count = cdns_readl(cdns, CDNS_MCP_FIFOLEVEL);
1217
1218         /* flush command FIFOs */
1219         cdns_updatel(cdns, CDNS_MCP_CONTROL, CDNS_MCP_CONTROL_CMD_RST,
1220                      CDNS_MCP_CONTROL_CMD_RST);
1221
1222         /* Set cmd accept mode */
1223         cdns_updatel(cdns, CDNS_MCP_CONTROL, CDNS_MCP_CONTROL_CMD_ACCEPT,
1224                      CDNS_MCP_CONTROL_CMD_ACCEPT);
1225
1226         /* Configure mcp config */
1227         val = cdns_readl(cdns, CDNS_MCP_CONFIG);
1228
1229         /* enable bus operations with clock and data */
1230         val &= ~CDNS_MCP_CONFIG_OP;
1231         val |= CDNS_MCP_CONFIG_OP_NORMAL;
1232
1233         /* Set cmd mode for Tx and Rx cmds */
1234         val &= ~CDNS_MCP_CONFIG_CMD;
1235
1236         /* Disable sniffer mode */
1237         val &= ~CDNS_MCP_CONFIG_SNIFFER;
1238
1239         /* Disable auto bus release */
1240         val &= ~CDNS_MCP_CONFIG_BUS_REL;
1241
1242         if (cdns->bus.multi_link)
1243                 /* Set Multi-master mode to take gsync into account */
1244                 val |= CDNS_MCP_CONFIG_MMASTER;
1245
1246         /* leave frame delay to hardware default of 0x1F */
1247
1248         /* leave command retry to hardware default of 0 */
1249
1250         cdns_writel(cdns, CDNS_MCP_CONFIG, val);
1251
1252         /* changes will be committed later */
1253         return 0;
1254 }
1255 EXPORT_SYMBOL(sdw_cdns_init);
1256
1257 int cdns_bus_conf(struct sdw_bus *bus, struct sdw_bus_params *params)
1258 {
1259         struct sdw_master_prop *prop = &bus->prop;
1260         struct sdw_cdns *cdns = bus_to_cdns(bus);
1261         int mcp_clkctrl_off;
1262         int divider;
1263
1264         if (!params->curr_dr_freq) {
1265                 dev_err(cdns->dev, "NULL curr_dr_freq\n");
1266                 return -EINVAL;
1267         }
1268
1269         divider = prop->mclk_freq * SDW_DOUBLE_RATE_FACTOR /
1270                 params->curr_dr_freq;
1271         divider--; /* divider is 1/(N+1) */
1272
1273         if (params->next_bank)
1274                 mcp_clkctrl_off = CDNS_MCP_CLK_CTRL1;
1275         else
1276                 mcp_clkctrl_off = CDNS_MCP_CLK_CTRL0;
1277
1278         cdns_updatel(cdns, mcp_clkctrl_off, CDNS_MCP_CLK_MCLKD_MASK, divider);
1279
1280         return 0;
1281 }
1282 EXPORT_SYMBOL(cdns_bus_conf);
1283
1284 static int cdns_port_params(struct sdw_bus *bus,
1285                             struct sdw_port_params *p_params, unsigned int bank)
1286 {
1287         struct sdw_cdns *cdns = bus_to_cdns(bus);
1288         int dpn_config = 0, dpn_config_off;
1289
1290         if (bank)
1291                 dpn_config_off = CDNS_DPN_B1_CONFIG(p_params->num);
1292         else
1293                 dpn_config_off = CDNS_DPN_B0_CONFIG(p_params->num);
1294
1295         dpn_config = cdns_readl(cdns, dpn_config_off);
1296
1297         u32p_replace_bits(&dpn_config, (p_params->bps - 1), CDNS_DPN_CONFIG_WL);
1298         u32p_replace_bits(&dpn_config, p_params->flow_mode, CDNS_DPN_CONFIG_PORT_FLOW);
1299         u32p_replace_bits(&dpn_config, p_params->data_mode, CDNS_DPN_CONFIG_PORT_DAT);
1300
1301         cdns_writel(cdns, dpn_config_off, dpn_config);
1302
1303         return 0;
1304 }
1305
1306 static int cdns_transport_params(struct sdw_bus *bus,
1307                                  struct sdw_transport_params *t_params,
1308                                  enum sdw_reg_bank bank)
1309 {
1310         struct sdw_cdns *cdns = bus_to_cdns(bus);
1311         int dpn_offsetctrl = 0, dpn_offsetctrl_off;
1312         int dpn_config = 0, dpn_config_off;
1313         int dpn_hctrl = 0, dpn_hctrl_off;
1314         int num = t_params->port_num;
1315         int dpn_samplectrl_off;
1316
1317         /*
1318          * Note: Only full data port is supported on the Master side for
1319          * both PCM and PDM ports.
1320          */
1321
1322         if (bank) {
1323                 dpn_config_off = CDNS_DPN_B1_CONFIG(num);
1324                 dpn_samplectrl_off = CDNS_DPN_B1_SAMPLE_CTRL(num);
1325                 dpn_hctrl_off = CDNS_DPN_B1_HCTRL(num);
1326                 dpn_offsetctrl_off = CDNS_DPN_B1_OFFSET_CTRL(num);
1327         } else {
1328                 dpn_config_off = CDNS_DPN_B0_CONFIG(num);
1329                 dpn_samplectrl_off = CDNS_DPN_B0_SAMPLE_CTRL(num);
1330                 dpn_hctrl_off = CDNS_DPN_B0_HCTRL(num);
1331                 dpn_offsetctrl_off = CDNS_DPN_B0_OFFSET_CTRL(num);
1332         }
1333
1334         dpn_config = cdns_readl(cdns, dpn_config_off);
1335         u32p_replace_bits(&dpn_config, t_params->blk_grp_ctrl, CDNS_DPN_CONFIG_BGC);
1336         u32p_replace_bits(&dpn_config, t_params->blk_pkg_mode, CDNS_DPN_CONFIG_BPM);
1337         cdns_writel(cdns, dpn_config_off, dpn_config);
1338
1339         u32p_replace_bits(&dpn_offsetctrl, t_params->offset1, CDNS_DPN_OFFSET_CTRL_1);
1340         u32p_replace_bits(&dpn_offsetctrl, t_params->offset2, CDNS_DPN_OFFSET_CTRL_2);
1341         cdns_writel(cdns, dpn_offsetctrl_off,  dpn_offsetctrl);
1342
1343         u32p_replace_bits(&dpn_hctrl, t_params->hstart, CDNS_DPN_HCTRL_HSTART);
1344         u32p_replace_bits(&dpn_hctrl, t_params->hstop, CDNS_DPN_HCTRL_HSTOP);
1345         u32p_replace_bits(&dpn_hctrl, t_params->lane_ctrl, CDNS_DPN_HCTRL_LCTRL);
1346
1347         cdns_writel(cdns, dpn_hctrl_off, dpn_hctrl);
1348         cdns_writel(cdns, dpn_samplectrl_off, (t_params->sample_interval - 1));
1349
1350         return 0;
1351 }
1352
1353 static int cdns_port_enable(struct sdw_bus *bus,
1354                             struct sdw_enable_ch *enable_ch, unsigned int bank)
1355 {
1356         struct sdw_cdns *cdns = bus_to_cdns(bus);
1357         int dpn_chnen_off, ch_mask;
1358
1359         if (bank)
1360                 dpn_chnen_off = CDNS_DPN_B1_CH_EN(enable_ch->port_num);
1361         else
1362                 dpn_chnen_off = CDNS_DPN_B0_CH_EN(enable_ch->port_num);
1363
1364         ch_mask = enable_ch->ch_mask * enable_ch->enable;
1365         cdns_writel(cdns, dpn_chnen_off, ch_mask);
1366
1367         return 0;
1368 }
1369
1370 static const struct sdw_master_port_ops cdns_port_ops = {
1371         .dpn_set_port_params = cdns_port_params,
1372         .dpn_set_port_transport_params = cdns_transport_params,
1373         .dpn_port_enable_ch = cdns_port_enable,
1374 };
1375
1376 /**
1377  * sdw_cdns_is_clock_stop: Check clock status
1378  *
1379  * @cdns: Cadence instance
1380  */
1381 bool sdw_cdns_is_clock_stop(struct sdw_cdns *cdns)
1382 {
1383         return !!(cdns_readl(cdns, CDNS_MCP_STAT) & CDNS_MCP_STAT_CLK_STOP);
1384 }
1385 EXPORT_SYMBOL(sdw_cdns_is_clock_stop);
1386
1387 /**
1388  * sdw_cdns_clock_stop: Cadence clock stop configuration routine
1389  *
1390  * @cdns: Cadence instance
1391  * @block_wake: prevent wakes if required by the platform
1392  */
1393 int sdw_cdns_clock_stop(struct sdw_cdns *cdns, bool block_wake)
1394 {
1395         bool slave_present = false;
1396         struct sdw_slave *slave;
1397         int ret;
1398
1399         /* Check suspend status */
1400         if (sdw_cdns_is_clock_stop(cdns)) {
1401                 dev_dbg(cdns->dev, "Clock is already stopped\n");
1402                 return 0;
1403         }
1404
1405         /*
1406          * Before entering clock stop we mask the Slave
1407          * interrupts. This helps avoid having to deal with e.g. a
1408          * Slave becoming UNATTACHED while the clock is being stopped
1409          */
1410         cdns_enable_slave_interrupts(cdns, false);
1411
1412         /*
1413          * For specific platforms, it is required to be able to put
1414          * master into a state in which it ignores wake-up trials
1415          * in clock stop state
1416          */
1417         if (block_wake)
1418                 cdns_updatel(cdns, CDNS_MCP_CONTROL,
1419                              CDNS_MCP_CONTROL_BLOCK_WAKEUP,
1420                              CDNS_MCP_CONTROL_BLOCK_WAKEUP);
1421
1422         list_for_each_entry(slave, &cdns->bus.slaves, node) {
1423                 if (slave->status == SDW_SLAVE_ATTACHED ||
1424                     slave->status == SDW_SLAVE_ALERT) {
1425                         slave_present = true;
1426                         break;
1427                 }
1428         }
1429
1430         /*
1431          * This CMD_ACCEPT should be used when there are no devices
1432          * attached on the link when entering clock stop mode. If this is
1433          * not set and there is a broadcast write then the command ignored
1434          * will be treated as a failure
1435          */
1436         if (!slave_present)
1437                 cdns_updatel(cdns, CDNS_MCP_CONTROL,
1438                              CDNS_MCP_CONTROL_CMD_ACCEPT,
1439                              CDNS_MCP_CONTROL_CMD_ACCEPT);
1440         else
1441                 cdns_updatel(cdns, CDNS_MCP_CONTROL,
1442                              CDNS_MCP_CONTROL_CMD_ACCEPT, 0);
1443
1444         /* commit changes */
1445         ret = cdns_config_update(cdns);
1446         if (ret < 0) {
1447                 dev_err(cdns->dev, "%s: config_update failed\n", __func__);
1448                 return ret;
1449         }
1450
1451         /* Prepare slaves for clock stop */
1452         ret = sdw_bus_prep_clk_stop(&cdns->bus);
1453         if (ret < 0) {
1454                 dev_err(cdns->dev, "prepare clock stop failed %d", ret);
1455                 return ret;
1456         }
1457
1458         /*
1459          * Enter clock stop mode and only report errors if there are
1460          * Slave devices present (ALERT or ATTACHED)
1461          */
1462         ret = sdw_bus_clk_stop(&cdns->bus);
1463         if (ret < 0 && slave_present && ret != -ENODATA) {
1464                 dev_err(cdns->dev, "bus clock stop failed %d", ret);
1465                 return ret;
1466         }
1467
1468         ret = cdns_set_wait(cdns, CDNS_MCP_STAT,
1469                             CDNS_MCP_STAT_CLK_STOP,
1470                             CDNS_MCP_STAT_CLK_STOP);
1471         if (ret < 0)
1472                 dev_err(cdns->dev, "Clock stop failed %d\n", ret);
1473
1474         return ret;
1475 }
1476 EXPORT_SYMBOL(sdw_cdns_clock_stop);
1477
1478 /**
1479  * sdw_cdns_clock_restart: Cadence PM clock restart configuration routine
1480  *
1481  * @cdns: Cadence instance
1482  * @bus_reset: context may be lost while in low power modes and the bus
1483  * may require a Severe Reset and re-enumeration after a wake.
1484  */
1485 int sdw_cdns_clock_restart(struct sdw_cdns *cdns, bool bus_reset)
1486 {
1487         int ret;
1488
1489         /* unmask Slave interrupts that were masked when stopping the clock */
1490         cdns_enable_slave_interrupts(cdns, true);
1491
1492         ret = cdns_clear_bit(cdns, CDNS_MCP_CONTROL,
1493                              CDNS_MCP_CONTROL_CLK_STOP_CLR);
1494         if (ret < 0) {
1495                 dev_err(cdns->dev, "Couldn't exit from clock stop\n");
1496                 return ret;
1497         }
1498
1499         ret = cdns_set_wait(cdns, CDNS_MCP_STAT, CDNS_MCP_STAT_CLK_STOP, 0);
1500         if (ret < 0) {
1501                 dev_err(cdns->dev, "clock stop exit failed %d\n", ret);
1502                 return ret;
1503         }
1504
1505         cdns_updatel(cdns, CDNS_MCP_CONTROL,
1506                      CDNS_MCP_CONTROL_BLOCK_WAKEUP, 0);
1507
1508         /*
1509          * clear CMD_ACCEPT so that the command ignored
1510          * will be treated as a failure during a broadcast write
1511          */
1512         cdns_updatel(cdns, CDNS_MCP_CONTROL, CDNS_MCP_CONTROL_CMD_ACCEPT, 0);
1513
1514         if (!bus_reset) {
1515
1516                 /* enable bus operations with clock and data */
1517                 cdns_updatel(cdns, CDNS_MCP_CONFIG,
1518                              CDNS_MCP_CONFIG_OP,
1519                              CDNS_MCP_CONFIG_OP_NORMAL);
1520
1521                 ret = cdns_config_update(cdns);
1522                 if (ret < 0) {
1523                         dev_err(cdns->dev, "%s: config_update failed\n", __func__);
1524                         return ret;
1525                 }
1526
1527                 ret = sdw_bus_exit_clk_stop(&cdns->bus);
1528                 if (ret < 0)
1529                         dev_err(cdns->dev, "bus failed to exit clock stop %d\n", ret);
1530         }
1531
1532         return ret;
1533 }
1534 EXPORT_SYMBOL(sdw_cdns_clock_restart);
1535
1536 /**
1537  * sdw_cdns_probe() - Cadence probe routine
1538  * @cdns: Cadence instance
1539  */
1540 int sdw_cdns_probe(struct sdw_cdns *cdns)
1541 {
1542         init_completion(&cdns->tx_complete);
1543         cdns->bus.port_ops = &cdns_port_ops;
1544
1545         INIT_WORK(&cdns->work, cdns_update_slave_status_work);
1546         return 0;
1547 }
1548 EXPORT_SYMBOL(sdw_cdns_probe);
1549
1550 int cdns_set_sdw_stream(struct snd_soc_dai *dai,
1551                         void *stream, bool pcm, int direction)
1552 {
1553         struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
1554         struct sdw_cdns_dma_data *dma;
1555
1556         if (stream) {
1557                 /* first paranoia check */
1558                 if (direction == SNDRV_PCM_STREAM_PLAYBACK)
1559                         dma = dai->playback_dma_data;
1560                 else
1561                         dma = dai->capture_dma_data;
1562
1563                 if (dma) {
1564                         dev_err(dai->dev,
1565                                 "dma_data already allocated for dai %s\n",
1566                                 dai->name);
1567                         return -EINVAL;
1568                 }
1569
1570                 /* allocate and set dma info */
1571                 dma = kzalloc(sizeof(*dma), GFP_KERNEL);
1572                 if (!dma)
1573                         return -ENOMEM;
1574
1575                 if (pcm)
1576                         dma->stream_type = SDW_STREAM_PCM;
1577                 else
1578                         dma->stream_type = SDW_STREAM_PDM;
1579
1580                 dma->bus = &cdns->bus;
1581                 dma->link_id = cdns->instance;
1582
1583                 dma->stream = stream;
1584
1585                 if (direction == SNDRV_PCM_STREAM_PLAYBACK)
1586                         dai->playback_dma_data = dma;
1587                 else
1588                         dai->capture_dma_data = dma;
1589         } else {
1590                 /* for NULL stream we release allocated dma_data */
1591                 if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
1592                         kfree(dai->playback_dma_data);
1593                         dai->playback_dma_data = NULL;
1594                 } else {
1595                         kfree(dai->capture_dma_data);
1596                         dai->capture_dma_data = NULL;
1597                 }
1598         }
1599         return 0;
1600 }
1601 EXPORT_SYMBOL(cdns_set_sdw_stream);
1602
1603 /**
1604  * cdns_find_pdi() - Find a free PDI
1605  *
1606  * @cdns: Cadence instance
1607  * @offset: Starting offset
1608  * @num: Number of PDIs
1609  * @pdi: PDI instances
1610  * @dai_id: DAI id
1611  *
1612  * Find a PDI for a given PDI array. The PDI num and dai_id are
1613  * expected to match, return NULL otherwise.
1614  */
1615 static struct sdw_cdns_pdi *cdns_find_pdi(struct sdw_cdns *cdns,
1616                                           unsigned int offset,
1617                                           unsigned int num,
1618                                           struct sdw_cdns_pdi *pdi,
1619                                           int dai_id)
1620 {
1621         int i;
1622
1623         for (i = offset; i < offset + num; i++)
1624                 if (pdi[i].num == dai_id)
1625                         return &pdi[i];
1626
1627         return NULL;
1628 }
1629
1630 /**
1631  * sdw_cdns_config_stream: Configure a stream
1632  *
1633  * @cdns: Cadence instance
1634  * @ch: Channel count
1635  * @dir: Data direction
1636  * @pdi: PDI to be used
1637  */
1638 void sdw_cdns_config_stream(struct sdw_cdns *cdns,
1639                             u32 ch, u32 dir, struct sdw_cdns_pdi *pdi)
1640 {
1641         u32 offset, val = 0;
1642
1643         if (dir == SDW_DATA_DIR_RX) {
1644                 val = CDNS_PORTCTRL_DIRN;
1645
1646                 if (cdns->bus.params.m_data_mode != SDW_PORT_DATA_MODE_NORMAL)
1647                         val |= CDNS_PORTCTRL_TEST_FAILED;
1648         }
1649         offset = CDNS_PORTCTRL + pdi->num * CDNS_PORT_OFFSET;
1650         cdns_updatel(cdns, offset,
1651                      CDNS_PORTCTRL_DIRN | CDNS_PORTCTRL_TEST_FAILED,
1652                      val);
1653
1654         val = pdi->num;
1655         val |= CDNS_PDI_CONFIG_SOFT_RESET;
1656         val |= FIELD_PREP(CDNS_PDI_CONFIG_CHANNEL, (1 << ch) - 1);
1657         cdns_writel(cdns, CDNS_PDI_CONFIG(pdi->num), val);
1658 }
1659 EXPORT_SYMBOL(sdw_cdns_config_stream);
1660
1661 /**
1662  * sdw_cdns_alloc_pdi() - Allocate a PDI
1663  *
1664  * @cdns: Cadence instance
1665  * @stream: Stream to be allocated
1666  * @ch: Channel count
1667  * @dir: Data direction
1668  * @dai_id: DAI id
1669  */
1670 struct sdw_cdns_pdi *sdw_cdns_alloc_pdi(struct sdw_cdns *cdns,
1671                                         struct sdw_cdns_streams *stream,
1672                                         u32 ch, u32 dir, int dai_id)
1673 {
1674         struct sdw_cdns_pdi *pdi = NULL;
1675
1676         if (dir == SDW_DATA_DIR_RX)
1677                 pdi = cdns_find_pdi(cdns, 0, stream->num_in, stream->in,
1678                                     dai_id);
1679         else
1680                 pdi = cdns_find_pdi(cdns, 0, stream->num_out, stream->out,
1681                                     dai_id);
1682
1683         /* check if we found a PDI, else find in bi-directional */
1684         if (!pdi)
1685                 pdi = cdns_find_pdi(cdns, 2, stream->num_bd, stream->bd,
1686                                     dai_id);
1687
1688         if (pdi) {
1689                 pdi->l_ch_num = 0;
1690                 pdi->h_ch_num = ch - 1;
1691                 pdi->dir = dir;
1692                 pdi->ch_count = ch;
1693         }
1694
1695         return pdi;
1696 }
1697 EXPORT_SYMBOL(sdw_cdns_alloc_pdi);
1698
1699 MODULE_LICENSE("Dual BSD/GPL");
1700 MODULE_DESCRIPTION("Cadence Soundwire Library");