drivers/ptp/ptp_clockmatrix.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * PTP hardware clock driver for the IDT ClockMatrix(TM) family of timing and
   4  * synchronization devices.
   5  *
   6  * Copyright (C) 2019 Integrated Device Technology, Inc., a Renesas Company.
   7  */
   8 #include <linux/firmware.h>
   9 #include <linux/i2c.h>
  10 #include <linux/module.h>
  11 #include <linux/ptp_clock_kernel.h>
  12 #include <linux/delay.h>
  13 #include <linux/jiffies.h>
  14 #include <linux/kernel.h>
  15 #include <linux/timekeeping.h>
  16 #include <linux/string.h>
  17
  18 #include "ptp_private.h"
  19 #include "ptp_clockmatrix.h"
  20
  21 MODULE_DESCRIPTION("Driver for IDT ClockMatrix(TM) family");
  22 MODULE_AUTHOR("Richard Cochran <[email protected]>");
  23 MODULE_AUTHOR("IDT support-1588 <[email protected]>");
  24 MODULE_VERSION("1.0");
  25 MODULE_LICENSE("GPL");
  26
  27 /*
  28  * The name of the firmware file to be loaded
  29  * over-rides any automatic selection
  30  */
  31 static char *firmware;
  32 module_param(firmware, charp, 0);
  33
  34 #define SETTIME_CORRECTION (0)
  35
  36 static long set_write_phase_ready(struct ptp_clock_info *ptp)
  37 {
  38         struct idtcm_channel *channel =
  39                 container_of(ptp, struct idtcm_channel, caps);
  40
  41         channel->write_phase_ready = 1;
  42
  43         return 0;
  44 }
  45
  46 static int char_array_to_timespec(u8 *buf,
  47                                   u8 count,
  48                                   struct timespec64 *ts)
  49 {
  50         u8 i;
  51         u64 nsec;
  52         time64_t sec;
  53
  54         if (count < TOD_BYTE_COUNT)
  55                 return 1;
  56
  57         /* Sub-nanoseconds are in buf[0]. */
  58         nsec = buf[4];
  59         for (i = 0; i < 3; i++) {
  60                 nsec <<= 8;
  61                 nsec |= buf[3 - i];
  62         }
  63
  64         sec = buf[10];
  65         for (i = 0; i < 5; i++) {
  66                 sec <<= 8;
  67                 sec |= buf[9 - i];
  68         }
  69
  70         ts->tv_sec = sec;
  71         ts->tv_nsec = nsec;
  72
  73         return 0;
  74 }
  75
  76 static int timespec_to_char_array(struct timespec64 const *ts,
  77                                   u8 *buf,
  78                                   u8 count)
  79 {
  80         u8 i;
  81         s32 nsec;
  82         time64_t sec;
  83
  84         if (count < TOD_BYTE_COUNT)
  85                 return 1;
  86
  87         nsec = ts->tv_nsec;
  88         sec = ts->tv_sec;
  89
  90         /* Sub-nanoseconds are in buf[0]. */
  91         buf[0] = 0;
  92         for (i = 1; i < 5; i++) {
  93                 buf[i] = nsec & 0xff;
  94                 nsec >>= 8;
  95         }
  96
  97         for (i = 5; i < TOD_BYTE_COUNT; i++) {
  98
  99                 buf[i] = sec & 0xff;
 100                 sec >>= 8;
 101         }
 102
 103         return 0;
 104 }
 105
 106 static int idtcm_strverscmp(const char *ver1, const char *ver2)
 107 {
 108         u8 num1;
 109         u8 num2;
 110         int result = 0;
 111
 112         /* loop through each level of the version string */
 113         while (result == 0) {
 114                 /* extract leading version numbers */
 115                 if (kstrtou8(ver1, 10, &num1) < 0)
 116                         return -1;
 117
 118                 if (kstrtou8(ver2, 10, &num2) < 0)
 119                         return -1;
 120
 121                 /* if numbers differ, then set the result */
 122                 if (num1 < num2)
 123                         result = -1;
 124                 else if (num1 > num2)
 125                         result = 1;
 126                 else {
 127                         /* if numbers are the same, go to next level */
 128                         ver1 = strchr(ver1, '.');
 129                         ver2 = strchr(ver2, '.');
 130                         if (!ver1 && !ver2)
 131                                 break;
 132                         else if (!ver1)
 133                                 result = -1;
 134                         else if (!ver2)
 135                                 result = 1;
 136                         else {
 137                                 ver1++;
 138                                 ver2++;
 139                         }
 140                 }
 141         }
 142         return result;
 143 }
 144
 145 static int idtcm_xfer_read(struct idtcm *idtcm,
 146                            u8 regaddr,
 147                            u8 *buf,
 148                            u16 count)
 149 {
 150         struct i2c_client *client = idtcm->client;
 151         struct i2c_msg msg[2];
 152         int cnt;
 153         char *fmt = "i2c_transfer failed at %d in %s, at addr: %04X!\n";
 154
 155         msg[0].addr = client->addr;
 156         msg[0].flags = 0;
 157         msg[0].len = 1;
 158         msg[0].buf = &regaddr;
 159
 160         msg[1].addr = client->addr;
 161         msg[1].flags = I2C_M_RD;
 162         msg[1].len = count;
 163         msg[1].buf = buf;
 164
 165         cnt = i2c_transfer(client->adapter, msg, 2);
 166
 167         if (cnt < 0) {
 168                 dev_err(&client->dev,
 169                         fmt,
 170                         __LINE__,
 171                         __func__,
 172                         regaddr);
 173                 return cnt;
 174         } else if (cnt != 2) {
 175                 dev_err(&client->dev,
 176                         "i2c_transfer sent only %d of %d messages\n", cnt, 2);
 177                 return -EIO;
 178         }
 179
 180         return 0;
 181 }
 182
 183 static int idtcm_xfer_write(struct idtcm *idtcm,
 184                             u8 regaddr,
 185                             u8 *buf,
 186                             u16 count)
 187 {
 188         struct i2c_client *client = idtcm->client;
 189         /* we add 1 byte for device register */
 190         u8 msg[IDTCM_MAX_WRITE_COUNT + 1];
 191         int cnt;
 192         char *fmt = "i2c_master_send failed at %d in %s, at addr: %04X!\n";
 193
 194         if (count > IDTCM_MAX_WRITE_COUNT)
 195                 return -EINVAL;
 196
 197         msg[0] = regaddr;
 198         memcpy(&msg[1], buf, count);
 199
 200         cnt = i2c_master_send(client, msg, count + 1);
 201
 202         if (cnt < 0) {
 203                 dev_err(&client->dev,
 204                         fmt,
 205                         __LINE__,
 206                         __func__,
 207                         regaddr);
 208                 return cnt;
 209         }
 210
 211         return 0;
 212 }
 213
 214 static int idtcm_page_offset(struct idtcm *idtcm, u8 val)
 215 {
 216         u8 buf[4];
 217         int err;
 218
 219         if (idtcm->page_offset == val)
 220                 return 0;
 221
 222         buf[0] = 0x0;
 223         buf[1] = val;
 224         buf[2] = 0x10;
 225         buf[3] = 0x20;
 226
 227         err = idtcm_xfer_write(idtcm, PAGE_ADDR, buf, sizeof(buf));
 228
 229         if (err) {
 230                 idtcm->page_offset = 0xff;
 231                 dev_err(&idtcm->client->dev, "failed to set page offset\n");
 232         } else {
 233                 idtcm->page_offset = val;
 234         }
 235
 236         return err;
 237 }
 238
 239 static int _idtcm_rdwr(struct idtcm *idtcm,
 240                        u16 regaddr,
 241                        u8 *buf,
 242                        u16 count,
 243                        bool write)
 244 {
 245         u8 hi;
 246         u8 lo;
 247         int err;
 248
 249         hi = (regaddr >> 8) & 0xff;
 250         lo = regaddr & 0xff;
 251
 252         err = idtcm_page_offset(idtcm, hi);
 253
 254         if (err)
 255                 return err;
 256
 257         if (write)
 258                 return idtcm_xfer_write(idtcm, lo, buf, count);
 259
 260         return idtcm_xfer_read(idtcm, lo, buf, count);
 261 }
 262
 263 static int idtcm_read(struct idtcm *idtcm,
 264                       u16 module,
 265                       u16 regaddr,
 266                       u8 *buf,
 267                       u16 count)
 268 {
 269         return _idtcm_rdwr(idtcm, module + regaddr, buf, count, false);
 270 }
 271
 272 static int idtcm_write(struct idtcm *idtcm,
 273                        u16 module,
 274                        u16 regaddr,
 275                        u8 *buf,
 276                        u16 count)
 277 {
 278         return _idtcm_rdwr(idtcm, module + regaddr, buf, count, true);
 279 }
 280
 281 static int _idtcm_gettime(struct idtcm_channel *channel,
 282                           struct timespec64 *ts)
 283 {
 284         struct idtcm *idtcm = channel->idtcm;
 285         u8 buf[TOD_BYTE_COUNT];
 286         u8 timeout = 10;
 287         u8 trigger;
 288         int err;
 289
 290         err = idtcm_read(idtcm, channel->tod_read_primary,
 291                          TOD_READ_PRIMARY_CMD, &trigger, sizeof(trigger));
 292         if (err)
 293                 return err;
 294
 295         trigger &= ~(TOD_READ_TRIGGER_MASK << TOD_READ_TRIGGER_SHIFT);
 296         trigger |= (1 << TOD_READ_TRIGGER_SHIFT);
 297         trigger &= ~TOD_READ_TRIGGER_MODE; /* single shot */
 298
 299         err = idtcm_write(idtcm, channel->tod_read_primary,
 300                           TOD_READ_PRIMARY_CMD, &trigger, sizeof(trigger));
 301         if (err)
 302                 return err;
 303
 304         /* wait trigger to be 0 */
 305         while (trigger & TOD_READ_TRIGGER_MASK) {
 306
 307                 if (idtcm->calculate_overhead_flag)
 308                         idtcm->start_time = ktime_get_raw();
 309
 310                 err = idtcm_read(idtcm, channel->tod_read_primary,
 311                                  TOD_READ_PRIMARY_CMD, &trigger,
 312                                  sizeof(trigger));
 313
 314                 if (err)
 315                         return err;
 316
 317                 if (--timeout == 0)
 318                         return -EIO;
 319         }
 320
 321         err = idtcm_read(idtcm, channel->tod_read_primary,
 322                          TOD_READ_PRIMARY, buf, sizeof(buf));
 323
 324         if (err)
 325                 return err;
 326
 327         err = char_array_to_timespec(buf, sizeof(buf), ts);
 328
 329         return err;
 330 }
 331
 332 static int _sync_pll_output(struct idtcm *idtcm,
 333                             u8 pll,
 334                             u8 sync_src,
 335                             u8 qn,
 336                             u8 qn_plus_1)
 337 {
 338         int err;
 339         u8 val;
 340         u16 sync_ctrl0;
 341         u16 sync_ctrl1;
 342         u8 temp;
 343
 344         if ((qn == 0) && (qn_plus_1 == 0))
 345                 return 0;
 346
 347         switch (pll) {
 348         case 0:
 349                 sync_ctrl0 = HW_Q0_Q1_CH_SYNC_CTRL_0;
 350                 sync_ctrl1 = HW_Q0_Q1_CH_SYNC_CTRL_1;
 351                 break;
 352         case 1:
 353                 sync_ctrl0 = HW_Q2_Q3_CH_SYNC_CTRL_0;
 354                 sync_ctrl1 = HW_Q2_Q3_CH_SYNC_CTRL_1;
 355                 break;
 356         case 2:
 357                 sync_ctrl0 = HW_Q4_Q5_CH_SYNC_CTRL_0;
 358                 sync_ctrl1 = HW_Q4_Q5_CH_SYNC_CTRL_1;
 359                 break;
 360         case 3:
 361                 sync_ctrl0 = HW_Q6_Q7_CH_SYNC_CTRL_0;
 362                 sync_ctrl1 = HW_Q6_Q7_CH_SYNC_CTRL_1;
 363                 break;
 364         case 4:
 365                 sync_ctrl0 = HW_Q8_CH_SYNC_CTRL_0;
 366                 sync_ctrl1 = HW_Q8_CH_SYNC_CTRL_1;
 367                 break;
 368         case 5:
 369                 sync_ctrl0 = HW_Q9_CH_SYNC_CTRL_0;
 370                 sync_ctrl1 = HW_Q9_CH_SYNC_CTRL_1;
 371                 break;
 372         case 6:
 373                 sync_ctrl0 = HW_Q10_CH_SYNC_CTRL_0;
 374                 sync_ctrl1 = HW_Q10_CH_SYNC_CTRL_1;
 375                 break;
 376         case 7:
 377                 sync_ctrl0 = HW_Q11_CH_SYNC_CTRL_0;
 378                 sync_ctrl1 = HW_Q11_CH_SYNC_CTRL_1;
 379                 break;
 380         default:
 381                 return -EINVAL;
 382         }
 383
 384         val = SYNCTRL1_MASTER_SYNC_RST;
 385
 386         /* Place master sync in reset */
 387         err = idtcm_write(idtcm, 0, sync_ctrl1, &val, sizeof(val));
 388         if (err)
 389                 return err;
 390
 391         err = idtcm_write(idtcm, 0, sync_ctrl0, &sync_src, sizeof(sync_src));
 392         if (err)
 393                 return err;
 394
 395         /* Set sync trigger mask */
 396         val |= SYNCTRL1_FBDIV_FRAME_SYNC_TRIG | SYNCTRL1_FBDIV_SYNC_TRIG;
 397
 398         if (qn)
 399                 val |= SYNCTRL1_Q0_DIV_SYNC_TRIG;
 400
 401         if (qn_plus_1)
 402                 val |= SYNCTRL1_Q1_DIV_SYNC_TRIG;
 403
 404         err = idtcm_write(idtcm, 0, sync_ctrl1, &val, sizeof(val));
 405         if (err)
 406                 return err;
 407
 408         /* PLL5 can have OUT8 as second additional output. */
 409         if ((pll == 5) && (qn_plus_1 != 0)) {
 410                 err = idtcm_read(idtcm, 0, HW_Q8_CTRL_SPARE,
 411                                  &temp, sizeof(temp));
 412                 if (err)
 413                         return err;
 414
 415                 temp &= ~(Q9_TO_Q8_SYNC_TRIG);
 416
 417                 err = idtcm_write(idtcm, 0, HW_Q8_CTRL_SPARE,
 418                                   &temp, sizeof(temp));
 419                 if (err)
 420                         return err;
 421
 422                 temp |= Q9_TO_Q8_SYNC_TRIG;
 423
 424                 err = idtcm_write(idtcm, 0, HW_Q8_CTRL_SPARE,
 425                                   &temp, sizeof(temp));
 426                 if (err)
 427                         return err;
 428         }
 429
 430         /* PLL6 can have OUT11 as second additional output. */
 431         if ((pll == 6) && (qn_plus_1 != 0)) {
 432                 err = idtcm_read(idtcm, 0, HW_Q11_CTRL_SPARE,
 433                                  &temp, sizeof(temp));
 434                 if (err)
 435                         return err;
 436
 437                 temp &= ~(Q10_TO_Q11_SYNC_TRIG);
 438
 439                 err = idtcm_write(idtcm, 0, HW_Q11_CTRL_SPARE,
 440                                   &temp, sizeof(temp));
 441                 if (err)
 442                         return err;
 443
 444                 temp |= Q10_TO_Q11_SYNC_TRIG;
 445
 446                 err = idtcm_write(idtcm, 0, HW_Q11_CTRL_SPARE,
 447                                   &temp, sizeof(temp));
 448                 if (err)
 449                         return err;
 450         }
 451
 452         /* Place master sync out of reset */
 453         val &= ~(SYNCTRL1_MASTER_SYNC_RST);
 454         err = idtcm_write(idtcm, 0, sync_ctrl1, &val, sizeof(val));
 455
 456         return err;
 457 }
 458
 459 static int sync_source_dpll_tod_pps(u16 tod_addr, u8 *sync_src)
 460 {
 461         int err = 0;
 462
 463         switch (tod_addr) {
 464         case TOD_0:
 465                 *sync_src = SYNC_SOURCE_DPLL0_TOD_PPS;
 466                 break;
 467         case TOD_1:
 468                 *sync_src = SYNC_SOURCE_DPLL1_TOD_PPS;
 469                 break;
 470         case TOD_2:
 471                 *sync_src = SYNC_SOURCE_DPLL2_TOD_PPS;
 472                 break;
 473         case TOD_3:
 474                 *sync_src = SYNC_SOURCE_DPLL3_TOD_PPS;
 475                 break;
 476         default:
 477                 err = -EINVAL;
 478         }
 479
 480         return err;
 481 }
 482
 483 static int idtcm_sync_pps_output(struct idtcm_channel *channel)
 484 {
 485         struct idtcm *idtcm = channel->idtcm;
 486
 487         u8 pll;
 488         u8 sync_src;
 489         u8 qn;
 490         u8 qn_plus_1;
 491         int err = 0;
 492         u8 out8_mux = 0;
 493         u8 out11_mux = 0;
 494         u8 temp;
 495
 496         u16 output_mask = channel->output_mask;
 497
 498         err = sync_source_dpll_tod_pps(channel->tod_n, &sync_src);
 499         if (err)
 500                 return err;
 501
 502         err = idtcm_read(idtcm, 0, HW_Q8_CTRL_SPARE,
 503                          &temp, sizeof(temp));
 504         if (err)
 505                 return err;
 506
 507         if ((temp & Q9_TO_Q8_FANOUT_AND_CLOCK_SYNC_ENABLE_MASK) ==
 508             Q9_TO_Q8_FANOUT_AND_CLOCK_SYNC_ENABLE_MASK)
 509                 out8_mux = 1;
 510
 511         err = idtcm_read(idtcm, 0, HW_Q11_CTRL_SPARE,
 512                          &temp, sizeof(temp));
 513         if (err)
 514                 return err;
 515
 516         if ((temp & Q10_TO_Q11_FANOUT_AND_CLOCK_SYNC_ENABLE_MASK) ==
 517             Q10_TO_Q11_FANOUT_AND_CLOCK_SYNC_ENABLE_MASK)
 518                 out11_mux = 1;
 519
 520         for (pll = 0; pll < 8; pll++) {
 521                 qn = 0;
 522                 qn_plus_1 = 0;
 523
 524                 if (pll < 4) {
 525                         /* First 4 pll has 2 outputs */
 526                         qn = output_mask & 0x1;
 527                         output_mask = output_mask >> 1;
 528                         qn_plus_1 = output_mask & 0x1;
 529                         output_mask = output_mask >> 1;
 530                 } else if (pll == 4) {
 531                         if (out8_mux == 0) {
 532                                 qn = output_mask & 0x1;
 533                                 output_mask = output_mask >> 1;
 534                         }
 535                 } else if (pll == 5) {
 536                         if (out8_mux) {
 537                                 qn_plus_1 = output_mask & 0x1;
 538                                 output_mask = output_mask >> 1;
 539                         }
 540                         qn = output_mask & 0x1;
 541                         output_mask = output_mask >> 1;
 542                 } else if (pll == 6) {
 543                         qn = output_mask & 0x1;
 544                         output_mask = output_mask >> 1;
 545                         if (out11_mux) {
 546                                 qn_plus_1 = output_mask & 0x1;
 547                                 output_mask = output_mask >> 1;
 548                         }
 549                 } else if (pll == 7) {
 550                         if (out11_mux == 0) {
 551                                 qn = output_mask & 0x1;
 552                                 output_mask = output_mask >> 1;
 553                         }
 554                 }
 555
 556                 if ((qn != 0) || (qn_plus_1 != 0))
 557                         err = _sync_pll_output(idtcm, pll, sync_src, qn,
 558                                                qn_plus_1);
 559
 560                 if (err)
 561                         return err;
 562         }
 563
 564         return err;
 565 }
 566
 567 static int _idtcm_set_dpll_hw_tod(struct idtcm_channel *channel,
 568                                struct timespec64 const *ts,
 569                                enum hw_tod_write_trig_sel wr_trig)
 570 {
 571         struct idtcm *idtcm = channel->idtcm;
 572
 573         u8 buf[TOD_BYTE_COUNT];
 574         u8 cmd;
 575         int err;
 576         struct timespec64 local_ts = *ts;
 577         s64 total_overhead_ns;
 578
 579         /* Configure HW TOD write trigger. */
 580         err = idtcm_read(idtcm, channel->hw_dpll_n, HW_DPLL_TOD_CTRL_1,
 581                          &cmd, sizeof(cmd));
 582
 583         if (err)
 584                 return err;
 585
 586         cmd &= ~(0x0f);
 587         cmd |= wr_trig | 0x08;
 588
 589         err = idtcm_write(idtcm, channel->hw_dpll_n, HW_DPLL_TOD_CTRL_1,
 590                           &cmd, sizeof(cmd));
 591
 592         if (err)
 593                 return err;
 594
 595         if (wr_trig  != HW_TOD_WR_TRIG_SEL_MSB) {
 596
 597                 err = timespec_to_char_array(&local_ts, buf, sizeof(buf));
 598
 599                 if (err)
 600                         return err;
 601
 602                 err = idtcm_write(idtcm, channel->hw_dpll_n,
 603                                   HW_DPLL_TOD_OVR__0, buf, sizeof(buf));
 604
 605                 if (err)
 606                         return err;
 607         }
 608
 609         /* ARM HW TOD write trigger. */
 610         cmd &= ~(0x08);
 611
 612         err = idtcm_write(idtcm, channel->hw_dpll_n, HW_DPLL_TOD_CTRL_1,
 613                           &cmd, sizeof(cmd));
 614
 615         if (wr_trig == HW_TOD_WR_TRIG_SEL_MSB) {
 616
 617                 if (idtcm->calculate_overhead_flag) {
 618                         /* Assumption: I2C @ 400KHz */
 619                         total_overhead_ns =  ktime_to_ns(ktime_get_raw()
 620                                                          - idtcm->start_time)
 621                                              + idtcm->tod_write_overhead_ns
 622                                              + SETTIME_CORRECTION;
 623
 624                         timespec64_add_ns(&local_ts, total_overhead_ns);
 625
 626                         idtcm->calculate_overhead_flag = 0;
 627                 }
 628
 629                 err = timespec_to_char_array(&local_ts, buf, sizeof(buf));
 630
 631                 if (err)
 632                         return err;
 633
 634                 err = idtcm_write(idtcm, channel->hw_dpll_n,
 635                                   HW_DPLL_TOD_OVR__0, buf, sizeof(buf));
 636         }
 637
 638         return err;
 639 }
 640
 641 static int _idtcm_set_dpll_scsr_tod(struct idtcm_channel *channel,
 642                                     struct timespec64 const *ts,
 643                                     enum scsr_tod_write_trig_sel wr_trig,
 644                                     enum scsr_tod_write_type_sel wr_type)
 645 {
 646         struct idtcm *idtcm = channel->idtcm;
 647         unsigned char buf[TOD_BYTE_COUNT], cmd;
 648         struct timespec64 local_ts = *ts;
 649         int err, count = 0;
 650
 651         timespec64_add_ns(&local_ts, SETTIME_CORRECTION);
 652
 653         err = timespec_to_char_array(&local_ts, buf, sizeof(buf));
 654
 655         if (err)
 656                 return err;
 657
 658         err = idtcm_write(idtcm, channel->tod_write, TOD_WRITE,
 659                           buf, sizeof(buf));
 660         if (err)
 661                 return err;
 662
 663         /* Trigger the write operation. */
 664         err = idtcm_read(idtcm, channel->tod_write, TOD_WRITE_CMD,
 665                          &cmd, sizeof(cmd));
 666         if (err)
 667                 return err;
 668
 669         cmd &= ~(TOD_WRITE_SELECTION_MASK << TOD_WRITE_SELECTION_SHIFT);
 670         cmd &= ~(TOD_WRITE_TYPE_MASK << TOD_WRITE_TYPE_SHIFT);
 671         cmd |= (wr_trig << TOD_WRITE_SELECTION_SHIFT);
 672         cmd |= (wr_type << TOD_WRITE_TYPE_SHIFT);
 673
 674         err = idtcm_write(idtcm, channel->tod_write, TOD_WRITE_CMD,
 675                            &cmd, sizeof(cmd));
 676         if (err)
 677                 return err;
 678
 679         /* Wait for the operation to complete. */
 680         while (1) {
 681                 /* pps trigger takes up to 1 sec to complete */
 682                 if (wr_trig == SCSR_TOD_WR_TRIG_SEL_TODPPS)
 683                         msleep(50);
 684
 685                 err = idtcm_read(idtcm, channel->tod_write, TOD_WRITE_CMD,
 686                                  &cmd, sizeof(cmd));
 687                 if (err)
 688                         return err;
 689
 690                 if (cmd == 0)
 691                         break;
 692
 693                 if (++count > 20) {
 694                         dev_err(&idtcm->client->dev,
 695                                 "Timed out waiting for the write counter\n");
 696                         return -EIO;
 697                 }
 698         }
 699
 700         return 0;
 701 }
 702
 703 static int _idtcm_settime(struct idtcm_channel *channel,
 704                           struct timespec64 const *ts,
 705                           enum hw_tod_write_trig_sel wr_trig)
 706 {
 707         struct idtcm *idtcm = channel->idtcm;
 708         int err;
 709         int i;
 710         u8 trig_sel;
 711
 712         err = _idtcm_set_dpll_hw_tod(channel, ts, wr_trig);
 713
 714         if (err)
 715                 return err;
 716
 717         /* Wait for the operation to complete. */
 718         for (i = 0; i < 10000; i++) {
 719                 err = idtcm_read(idtcm, channel->hw_dpll_n,
 720                                  HW_DPLL_TOD_CTRL_1, &trig_sel,
 721                                  sizeof(trig_sel));
 722
 723                 if (err)
 724                         return err;
 725
 726                 if (trig_sel == 0x4a)
 727                         break;
 728
 729                 err = 1;
 730         }
 731
 732         if (err) {
 733                 dev_err(&idtcm->client->dev,
 734                         "Failed at line %d in func %s!\n",
 735                         __LINE__,
 736                         __func__);
 737                 return err;
 738         }
 739
 740         return idtcm_sync_pps_output(channel);
 741 }
 742
 743 static int _idtcm_settime_v487(struct idtcm_channel *channel,
 744                                struct timespec64 const *ts,
 745                                enum scsr_tod_write_type_sel wr_type)
 746 {
 747         return _idtcm_set_dpll_scsr_tod(channel, ts,
 748                                         SCSR_TOD_WR_TRIG_SEL_IMMEDIATE,
 749                                         wr_type);
 750 }
 751
 752 static int idtcm_set_phase_pull_in_offset(struct idtcm_channel *channel,
 753                                           s32 offset_ns)
 754 {
 755         int err;
 756         int i;
 757         struct idtcm *idtcm = channel->idtcm;
 758
 759         u8 buf[4];
 760
 761         for (i = 0; i < 4; i++) {
 762                 buf[i] = 0xff & (offset_ns);
 763                 offset_ns >>= 8;
 764         }
 765
 766         err = idtcm_write(idtcm, channel->dpll_phase_pull_in, PULL_IN_OFFSET,
 767                           buf, sizeof(buf));
 768
 769         return err;
 770 }
 771
 772 static int idtcm_set_phase_pull_in_slope_limit(struct idtcm_channel *channel,
 773                                                u32 max_ffo_ppb)
 774 {
 775         int err;
 776         u8 i;
 777         struct idtcm *idtcm = channel->idtcm;
 778
 779         u8 buf[3];
 780
 781         if (max_ffo_ppb & 0xff000000)
 782                 max_ffo_ppb = 0;
 783
 784         for (i = 0; i < 3; i++) {
 785                 buf[i] = 0xff & (max_ffo_ppb);
 786                 max_ffo_ppb >>= 8;
 787         }
 788
 789         err = idtcm_write(idtcm, channel->dpll_phase_pull_in,
 790                           PULL_IN_SLOPE_LIMIT, buf, sizeof(buf));
 791
 792         return err;
 793 }
 794
 795 static int idtcm_start_phase_pull_in(struct idtcm_channel *channel)
 796 {
 797         int err;
 798         struct idtcm *idtcm = channel->idtcm;
 799
 800         u8 buf;
 801
 802         err = idtcm_read(idtcm, channel->dpll_phase_pull_in, PULL_IN_CTRL,
 803                          &buf, sizeof(buf));
 804
 805         if (err)
 806                 return err;
 807
 808         if (buf == 0) {
 809                 buf = 0x01;
 810                 err = idtcm_write(idtcm, channel->dpll_phase_pull_in,
 811                                   PULL_IN_CTRL, &buf, sizeof(buf));
 812         } else {
 813                 err = -EBUSY;
 814         }
 815
 816         return err;
 817 }
 818
 819 static int idtcm_do_phase_pull_in(struct idtcm_channel *channel,
 820                                   s32 offset_ns,
 821                                   u32 max_ffo_ppb)
 822 {
 823         int err;
 824
 825         err = idtcm_set_phase_pull_in_offset(channel, -offset_ns);
 826
 827         if (err)
 828                 return err;
 829
 830         err = idtcm_set_phase_pull_in_slope_limit(channel, max_ffo_ppb);
 831
 832         if (err)
 833                 return err;
 834
 835         err = idtcm_start_phase_pull_in(channel);
 836
 837         return err;
 838 }
 839
 840 static int set_tod_write_overhead(struct idtcm_channel *channel)
 841 {
 842         struct idtcm *idtcm = channel->idtcm;
 843         s64 current_ns = 0;
 844         s64 lowest_ns = 0;
 845         int err;
 846         u8 i;
 847
 848         ktime_t start;
 849         ktime_t stop;
 850
 851         char buf[TOD_BYTE_COUNT] = {0};
 852
 853         /* Set page offset */
 854         idtcm_write(idtcm, channel->hw_dpll_n, HW_DPLL_TOD_OVR__0,
 855                     buf, sizeof(buf));
 856
 857         for (i = 0; i < TOD_WRITE_OVERHEAD_COUNT_MAX; i++) {
 858
 859                 start = ktime_get_raw();
 860
 861                 err = idtcm_write(idtcm, channel->hw_dpll_n,
 862                                   HW_DPLL_TOD_OVR__0, buf, sizeof(buf));
 863
 864                 if (err)
 865                         return err;
 866
 867                 stop = ktime_get_raw();
 868
 869                 current_ns = ktime_to_ns(stop - start);
 870
 871                 if (i == 0) {
 872                         lowest_ns = current_ns;
 873                 } else {
 874                         if (current_ns < lowest_ns)
 875                                 lowest_ns = current_ns;
 876                 }
 877         }
 878
 879         idtcm->tod_write_overhead_ns = lowest_ns;
 880
 881         return err;
 882 }
 883
 884 static int _idtcm_adjtime(struct idtcm_channel *channel, s64 delta)
 885 {
 886         int err;
 887         struct idtcm *idtcm = channel->idtcm;
 888         struct timespec64 ts;
 889         s64 now;
 890
 891         if (abs(delta) < PHASE_PULL_IN_THRESHOLD_NS) {
 892                 err = idtcm_do_phase_pull_in(channel, delta, 0);
 893         } else {
 894                 idtcm->calculate_overhead_flag = 1;
 895
 896                 err = set_tod_write_overhead(channel);
 897
 898                 if (err)
 899                         return err;
 900
 901                 err = _idtcm_gettime(channel, &ts);
 902
 903                 if (err)
 904                         return err;
 905
 906                 now = timespec64_to_ns(&ts);
 907                 now += delta;
 908
 909                 ts = ns_to_timespec64(now);
 910
 911                 err = _idtcm_settime(channel, &ts, HW_TOD_WR_TRIG_SEL_MSB);
 912         }
 913
 914         return err;
 915 }
 916
 917 static int idtcm_state_machine_reset(struct idtcm *idtcm)
 918 {
 919         int err;
 920         u8 byte = SM_RESET_CMD;
 921
 922         err = idtcm_write(idtcm, RESET_CTRL, SM_RESET, &byte, sizeof(byte));
 923
 924         if (!err)
 925                 msleep_interruptible(POST_SM_RESET_DELAY_MS);
 926
 927         return err;
 928 }
 929
 930 static int idtcm_read_hw_rev_id(struct idtcm *idtcm, u8 *hw_rev_id)
 931 {
 932         return idtcm_read(idtcm, HW_REVISION, REV_ID, hw_rev_id, sizeof(u8));
 933 }
 934
 935 static int idtcm_read_product_id(struct idtcm *idtcm, u16 *product_id)
 936 {
 937         int err;
 938         u8 buf[2] = {0};
 939
 940         err = idtcm_read(idtcm, GENERAL_STATUS, PRODUCT_ID, buf, sizeof(buf));
 941
 942         *product_id = (buf[1] << 8) | buf[0];
 943
 944         return err;
 945 }
 946
 947 static int idtcm_read_major_release(struct idtcm *idtcm, u8 *major)
 948 {
 949         int err;
 950         u8 buf = 0;
 951
 952         err = idtcm_read(idtcm, GENERAL_STATUS, MAJ_REL, &buf, sizeof(buf));
 953
 954         *major = buf >> 1;
 955
 956         return err;
 957 }
 958
 959 static int idtcm_read_minor_release(struct idtcm *idtcm, u8 *minor)
 960 {
 961         return idtcm_read(idtcm, GENERAL_STATUS, MIN_REL, minor, sizeof(u8));
 962 }
 963
 964 static int idtcm_read_hotfix_release(struct idtcm *idtcm, u8 *hotfix)
 965 {
 966         return idtcm_read(idtcm,
 967                           GENERAL_STATUS,
 968                           HOTFIX_REL,
 969                           hotfix,
 970                           sizeof(u8));
 971 }
 972
 973 static int idtcm_read_otp_scsr_config_select(struct idtcm *idtcm,
 974                                              u8 *config_select)
 975 {
 976         return idtcm_read(idtcm, GENERAL_STATUS, OTP_SCSR_CONFIG_SELECT,
 977                           config_select, sizeof(u8));
 978 }
 979
 980 static int set_pll_output_mask(struct idtcm *idtcm, u16 addr, u8 val)
 981 {
 982         int err = 0;
 983
 984         switch (addr) {
 985         case TOD0_OUT_ALIGN_MASK_ADDR:
 986                 SET_U16_LSB(idtcm->channel[0].output_mask, val);
 987                 break;
 988         case TOD0_OUT_ALIGN_MASK_ADDR + 1:
 989                 SET_U16_MSB(idtcm->channel[0].output_mask, val);
 990                 break;
 991         case TOD1_OUT_ALIGN_MASK_ADDR:
 992                 SET_U16_LSB(idtcm->channel[1].output_mask, val);
 993                 break;
 994         case TOD1_OUT_ALIGN_MASK_ADDR + 1:
 995                 SET_U16_MSB(idtcm->channel[1].output_mask, val);
 996                 break;
 997         case TOD2_OUT_ALIGN_MASK_ADDR:
 998                 SET_U16_LSB(idtcm->channel[2].output_mask, val);
 999                 break;
1000         case TOD2_OUT_ALIGN_MASK_ADDR + 1:
1001                 SET_U16_MSB(idtcm->channel[2].output_mask, val);
1002                 break;
1003         case TOD3_OUT_ALIGN_MASK_ADDR:
1004                 SET_U16_LSB(idtcm->channel[3].output_mask, val);
1005                 break;
1006         case TOD3_OUT_ALIGN_MASK_ADDR + 1:
1007                 SET_U16_MSB(idtcm->channel[3].output_mask, val);
1008                 break;
1009         default:
1010                 err = -EFAULT; /* Bad address */;
1011                 break;
1012         }
1013
1014         return err;
1015 }
1016
1017 static int set_tod_ptp_pll(struct idtcm *idtcm, u8 index, u8 pll)
1018 {
1019         if (index >= MAX_TOD) {
1020                 dev_err(&idtcm->client->dev, "ToD%d not supported\n", index);
1021                 return -EINVAL;
1022         }
1023
1024         if (pll >= MAX_PLL) {
1025                 dev_err(&idtcm->client->dev, "Pll%d not supported\n", pll);
1026                 return -EINVAL;
1027         }
1028
1029         idtcm->channel[index].pll = pll;
1030
1031         return 0;
1032 }
1033
1034 static int check_and_set_masks(struct idtcm *idtcm,
1035                                u16 regaddr,
1036                                u8 val)
1037 {
1038         int err = 0;
1039
1040         switch (regaddr) {
1041         case TOD_MASK_ADDR:
1042                 if ((val & 0xf0) || !(val & 0x0f)) {
1043                         dev_err(&idtcm->client->dev,
1044                                 "Invalid TOD mask 0x%hhx\n", val);
1045                         err = -EINVAL;
1046                 } else {
1047                         idtcm->tod_mask = val;
1048                 }
1049                 break;
1050         case TOD0_PTP_PLL_ADDR:
1051                 err = set_tod_ptp_pll(idtcm, 0, val);
1052                 break;
1053         case TOD1_PTP_PLL_ADDR:
1054                 err = set_tod_ptp_pll(idtcm, 1, val);
1055                 break;
1056         case TOD2_PTP_PLL_ADDR:
1057                 err = set_tod_ptp_pll(idtcm, 2, val);
1058                 break;
1059         case TOD3_PTP_PLL_ADDR:
1060                 err = set_tod_ptp_pll(idtcm, 3, val);
1061                 break;
1062         default:
1063                 err = set_pll_output_mask(idtcm, regaddr, val);
1064                 break;
1065         }
1066
1067         return err;
1068 }
1069
1070 static void display_pll_and_masks(struct idtcm *idtcm)
1071 {
1072         u8 i;
1073         u8 mask;
1074
1075         dev_dbg(&idtcm->client->dev, "tod_mask = 0x%02x\n", idtcm->tod_mask);
1076
1077         for (i = 0; i < MAX_TOD; i++) {
1078                 mask = 1 << i;
1079
1080                 if (mask & idtcm->tod_mask)
1081                         dev_dbg(&idtcm->client->dev,
1082                                 "TOD%d pll = %d    output_mask = 0x%04x\n",
1083                                 i, idtcm->channel[i].pll,
1084                                 idtcm->channel[i].output_mask);
1085         }
1086 }
1087
1088 static int idtcm_load_firmware(struct idtcm *idtcm,
1089                                struct device *dev)
1090 {
1091         char fname[128] = FW_FILENAME;
1092         const struct firmware *fw;
1093         struct idtcm_fwrc *rec;
1094         u32 regaddr;
1095         int err;
1096         s32 len;
1097         u8 val;
1098         u8 loaddr;
1099
1100         if (firmware) /* module parameter */
1101                 snprintf(fname, sizeof(fname), "%s", firmware);
1102
1103         dev_dbg(&idtcm->client->dev, "requesting firmware '%s'\n", fname);
1104
1105         err = request_firmware(&fw, fname, dev);
1106
1107         if (err) {
1108                 dev_err(&idtcm->client->dev,
1109                         "Failed at line %d in func %s!\n",
1110                         __LINE__,
1111                         __func__);
1112                 return err;
1113         }
1114
1115         dev_dbg(&idtcm->client->dev, "firmware size %zu bytes\n", fw->size);
1116
1117         rec = (struct idtcm_fwrc *) fw->data;
1118
1119         if (fw->size > 0)
1120                 idtcm_state_machine_reset(idtcm);
1121
1122         for (len = fw->size; len > 0; len -= sizeof(*rec)) {
1123
1124                 if (rec->reserved) {
1125                         dev_err(&idtcm->client->dev,
1126                                 "bad firmware, reserved field non-zero\n");
1127                         err = -EINVAL;
1128                 } else {
1129                         regaddr = rec->hiaddr << 8;
1130                         regaddr |= rec->loaddr;
1131
1132                         val = rec->value;
1133                         loaddr = rec->loaddr;
1134
1135                         rec++;
1136
1137                         err = check_and_set_masks(idtcm, regaddr, val);
1138                 }
1139
1140                 if (err != -EINVAL) {
1141                         err = 0;
1142
1143                         /* Top (status registers) and bottom are read-only */
1144                         if ((regaddr < GPIO_USER_CONTROL)
1145                             || (regaddr >= SCRATCH))
1146                                 continue;
1147
1148                         /* Page size 128, last 4 bytes of page skipped */
1149                         if (((loaddr > 0x7b) && (loaddr <= 0x7f))
1150                              || loaddr > 0xfb)
1151                                 continue;
1152
1153                         err = idtcm_write(idtcm, regaddr, 0, &val, sizeof(val));
1154                 }
1155
1156                 if (err)
1157                         goto out;
1158         }
1159
1160         display_pll_and_masks(idtcm);
1161
1162 out:
1163         release_firmware(fw);
1164         return err;
1165 }
1166
1167 static int idtcm_output_enable(struct idtcm_channel *channel,
1168                                bool enable, unsigned int outn)
1169 {
1170         struct idtcm *idtcm = channel->idtcm;
1171         int err;
1172         u8 val;
1173
1174         err = idtcm_read(idtcm, OUTPUT_MODULE_FROM_INDEX(outn),
1175                          OUT_CTRL_1, &val, sizeof(val));
1176
1177         if (err)
1178                 return err;
1179
1180         if (enable)
1181                 val |= SQUELCH_DISABLE;
1182         else
1183                 val &= ~SQUELCH_DISABLE;
1184
1185         return idtcm_write(idtcm, OUTPUT_MODULE_FROM_INDEX(outn),
1186                            OUT_CTRL_1, &val, sizeof(val));
1187 }
1188
1189 static int idtcm_output_mask_enable(struct idtcm_channel *channel,
1190                                     bool enable)
1191 {
1192         u16 mask;
1193         int err;
1194         u8 outn;
1195
1196         mask = channel->output_mask;
1197         outn = 0;
1198
1199         while (mask) {
1200
1201                 if (mask & 0x1) {
1202
1203                         err = idtcm_output_enable(channel, enable, outn);
1204
1205                         if (err)
1206                                 return err;
1207                 }
1208
1209                 mask >>= 0x1;
1210                 outn++;
1211         }
1212
1213         return 0;
1214 }
1215
1216 static int idtcm_perout_enable(struct idtcm_channel *channel,
1217                                bool enable,
1218                                struct ptp_perout_request *perout)
1219 {
1220         unsigned int flags = perout->flags;
1221
1222         if (flags == PEROUT_ENABLE_OUTPUT_MASK)
1223                 return idtcm_output_mask_enable(channel, enable);
1224
1225         /* Enable/disable individual output instead */
1226         return idtcm_output_enable(channel, enable, perout->index);
1227 }
1228
1229 static int idtcm_set_pll_mode(struct idtcm_channel *channel,
1230                               enum pll_mode pll_mode)
1231 {
1232         struct idtcm *idtcm = channel->idtcm;
1233         int err;
1234         u8 dpll_mode;
1235
1236         err = idtcm_read(idtcm, channel->dpll_n, DPLL_MODE,
1237                          &dpll_mode, sizeof(dpll_mode));
1238         if (err)
1239                 return err;
1240
1241         dpll_mode &= ~(PLL_MODE_MASK << PLL_MODE_SHIFT);
1242
1243         dpll_mode |= (pll_mode << PLL_MODE_SHIFT);
1244
1245         channel->pll_mode = pll_mode;
1246
1247         err = idtcm_write(idtcm, channel->dpll_n, DPLL_MODE,
1248                           &dpll_mode, sizeof(dpll_mode));
1249         if (err)
1250                 return err;
1251
1252         return 0;
1253 }
1254
1255 /* PTP Hardware Clock interface */
1256
1257 /**
1258  * @brief Maximum absolute value for write phase offset in picoseconds
1259  *
1260  * Destination signed register is 32-bit register in resolution of 50ps
1261  *
1262  * 0x7fffffff * 50 =  2147483647 * 50 = 107374182350
1263  */
1264 static int _idtcm_adjphase(struct idtcm_channel *channel, s32 delta_ns)
1265 {
1266         struct idtcm *idtcm = channel->idtcm;
1267
1268         int err;
1269         u8 i;
1270         u8 buf[4] = {0};
1271         s32 phase_50ps;
1272         s64 offset_ps;
1273
1274         if (channel->pll_mode != PLL_MODE_WRITE_PHASE) {
1275
1276                 err = idtcm_set_pll_mode(channel, PLL_MODE_WRITE_PHASE);
1277
1278                 if (err)
1279                         return err;
1280
1281                 channel->write_phase_ready = 0;
1282
1283                 ptp_schedule_worker(channel->ptp_clock,
1284                                     msecs_to_jiffies(WR_PHASE_SETUP_MS));
1285         }
1286
1287         if (!channel->write_phase_ready)
1288                 delta_ns = 0;
1289
1290         offset_ps = (s64)delta_ns * 1000;
1291
1292         /*
1293          * Check for 32-bit signed max * 50:
1294          *
1295          * 0x7fffffff * 50 =  2147483647 * 50 = 107374182350
1296          */
1297         if (offset_ps > MAX_ABS_WRITE_PHASE_PICOSECONDS)
1298                 offset_ps = MAX_ABS_WRITE_PHASE_PICOSECONDS;
1299         else if (offset_ps < -MAX_ABS_WRITE_PHASE_PICOSECONDS)
1300                 offset_ps = -MAX_ABS_WRITE_PHASE_PICOSECONDS;
1301
1302         phase_50ps = DIV_ROUND_CLOSEST(div64_s64(offset_ps, 50), 1);
1303
1304         for (i = 0; i < 4; i++) {
1305                 buf[i] = phase_50ps & 0xff;
1306                 phase_50ps >>= 8;
1307         }
1308
1309         err = idtcm_write(idtcm, channel->dpll_phase, DPLL_WR_PHASE,
1310                           buf, sizeof(buf));
1311
1312         return err;
1313 }
1314
1315 static int _idtcm_adjfine(struct idtcm_channel *channel, long scaled_ppm)
1316 {
1317         struct idtcm *idtcm = channel->idtcm;
1318         u8 i;
1319         bool neg_adj = 0;
1320         int err;
1321         u8 buf[6] = {0};
1322         s64 fcw;
1323
1324         if (channel->pll_mode  != PLL_MODE_WRITE_FREQUENCY) {
1325                 err = idtcm_set_pll_mode(channel, PLL_MODE_WRITE_FREQUENCY);
1326                 if (err)
1327                         return err;
1328         }
1329
1330         /*
1331          * Frequency Control Word unit is: 1.11 * 10^-10 ppm
1332          *
1333          * adjfreq:
1334          *       ppb * 10^9
1335          * FCW = ----------
1336          *          111
1337          *
1338          * adjfine:
1339          *       ppm_16 * 5^12
1340          * FCW = -------------
1341          *         111 * 2^4
1342          */
1343         if (scaled_ppm < 0) {
1344                 neg_adj = 1;
1345                 scaled_ppm = -scaled_ppm;
1346         }
1347
1348         /* 2 ^ -53 = 1.1102230246251565404236316680908e-16 */
1349         fcw = scaled_ppm * 244140625ULL;
1350
1351         fcw = div_u64(fcw, 1776);
1352
1353         if (neg_adj)
1354                 fcw = -fcw;
1355
1356         for (i = 0; i < 6; i++) {
1357                 buf[i] = fcw & 0xff;
1358                 fcw >>= 8;
1359         }
1360
1361         err = idtcm_write(idtcm, channel->dpll_freq, DPLL_WR_FREQ,
1362                           buf, sizeof(buf));
1363
1364         return err;
1365 }
1366
1367 static int idtcm_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)
1368 {
1369         struct idtcm_channel *channel =
1370                 container_of(ptp, struct idtcm_channel, caps);
1371         struct idtcm *idtcm = channel->idtcm;
1372         int err;
1373
1374         mutex_lock(&idtcm->reg_lock);
1375
1376         err = _idtcm_gettime(channel, ts);
1377
1378         if (err)
1379                 dev_err(&idtcm->client->dev,
1380                         "Failed at line %d in func %s!\n",
1381                         __LINE__,
1382                         __func__);
1383
1384         mutex_unlock(&idtcm->reg_lock);
1385
1386         return err;
1387 }
1388
1389 static int idtcm_settime(struct ptp_clock_info *ptp,
1390                          const struct timespec64 *ts)
1391 {
1392         struct idtcm_channel *channel =
1393                 container_of(ptp, struct idtcm_channel, caps);
1394         struct idtcm *idtcm = channel->idtcm;
1395         int err;
1396
1397         mutex_lock(&idtcm->reg_lock);
1398
1399         err = _idtcm_settime(channel, ts, HW_TOD_WR_TRIG_SEL_MSB);
1400
1401         if (err)
1402                 dev_err(&idtcm->client->dev,
1403                         "Failed at line %d in func %s!\n",
1404                         __LINE__,
1405                         __func__);
1406
1407         mutex_unlock(&idtcm->reg_lock);
1408
1409         return err;
1410 }
1411
1412 static int idtcm_settime_v487(struct ptp_clock_info *ptp,
1413                          const struct timespec64 *ts)
1414 {
1415         struct idtcm_channel *channel =
1416                 container_of(ptp, struct idtcm_channel, caps);
1417         struct idtcm *idtcm = channel->idtcm;
1418         int err;
1419
1420         mutex_lock(&idtcm->reg_lock);
1421
1422         err = _idtcm_settime_v487(channel, ts, SCSR_TOD_WR_TYPE_SEL_ABSOLUTE);
1423
1424         if (err)
1425                 dev_err(&idtcm->client->dev,
1426                         "Failed at line %d in func %s!\n",
1427                         __LINE__,
1428                         __func__);
1429
1430         mutex_unlock(&idtcm->reg_lock);
1431
1432         return err;
1433 }
1434
1435 static int idtcm_adjtime(struct ptp_clock_info *ptp, s64 delta)
1436 {
1437         struct idtcm_channel *channel =
1438                 container_of(ptp, struct idtcm_channel, caps);
1439         struct idtcm *idtcm = channel->idtcm;
1440         int err;
1441
1442         mutex_lock(&idtcm->reg_lock);
1443
1444         err = _idtcm_adjtime(channel, delta);
1445
1446         if (err)
1447                 dev_err(&idtcm->client->dev,
1448                         "Failed at line %d in func %s!\n",
1449                         __LINE__,
1450                         __func__);
1451
1452         mutex_unlock(&idtcm->reg_lock);
1453
1454         return err;
1455 }
1456
1457 static int idtcm_adjtime_v487(struct ptp_clock_info *ptp, s64 delta)
1458 {
1459         struct idtcm_channel *channel =
1460                 container_of(ptp, struct idtcm_channel, caps);
1461         struct idtcm *idtcm = channel->idtcm;
1462         struct timespec64 ts;
1463         enum scsr_tod_write_type_sel type;
1464         int err;
1465
1466         if (abs(delta) < PHASE_PULL_IN_THRESHOLD_NS_V487) {
1467                 err = idtcm_do_phase_pull_in(channel, delta, 0);
1468                 if (err)
1469                         dev_err(&idtcm->client->dev,
1470                                 "Failed at line %d in func %s!\n",
1471                                 __LINE__,
1472                                 __func__);
1473                 return err;
1474         }
1475
1476         if (delta >= 0) {
1477                 ts = ns_to_timespec64(delta);
1478                 type = SCSR_TOD_WR_TYPE_SEL_DELTA_PLUS;
1479         } else {
1480                 ts = ns_to_timespec64(-delta);
1481                 type = SCSR_TOD_WR_TYPE_SEL_DELTA_MINUS;
1482         }
1483
1484         mutex_lock(&idtcm->reg_lock);
1485
1486         err = _idtcm_settime_v487(channel, &ts, type);
1487
1488         if (err)
1489                 dev_err(&idtcm->client->dev,
1490                         "Failed at line %d in func %s!\n",
1491                         __LINE__,
1492                         __func__);
1493
1494         mutex_unlock(&idtcm->reg_lock);
1495
1496         return err;
1497 }
1498
1499 static int idtcm_adjphase(struct ptp_clock_info *ptp, s32 delta)
1500 {
1501         struct idtcm_channel *channel =
1502                 container_of(ptp, struct idtcm_channel, caps);
1503
1504         struct idtcm *idtcm = channel->idtcm;
1505
1506         int err;
1507
1508         mutex_lock(&idtcm->reg_lock);
1509
1510         err = _idtcm_adjphase(channel, delta);
1511
1512         if (err)
1513                 dev_err(&idtcm->client->dev,
1514                         "Failed at line %d in func %s!\n",
1515                         __LINE__,
1516                         __func__);
1517
1518         mutex_unlock(&idtcm->reg_lock);
1519
1520         return err;
1521 }
1522
1523 static int idtcm_adjfine(struct ptp_clock_info *ptp,  long scaled_ppm)
1524 {
1525         struct idtcm_channel *channel =
1526                 container_of(ptp, struct idtcm_channel, caps);
1527
1528         struct idtcm *idtcm = channel->idtcm;
1529
1530         int err;
1531
1532         mutex_lock(&idtcm->reg_lock);
1533
1534         err = _idtcm_adjfine(channel, scaled_ppm);
1535
1536         if (err)
1537                 dev_err(&idtcm->client->dev,
1538                         "Failed at line %d in func %s!\n",
1539                         __LINE__,
1540                         __func__);
1541
1542         mutex_unlock(&idtcm->reg_lock);
1543
1544         return err;
1545 }
1546
1547 static int idtcm_enable(struct ptp_clock_info *ptp,
1548                         struct ptp_clock_request *rq, int on)
1549 {
1550         int err;
1551
1552         struct idtcm_channel *channel =
1553                 container_of(ptp, struct idtcm_channel, caps);
1554
1555         switch (rq->type) {
1556         case PTP_CLK_REQ_PEROUT:
1557                 if (!on) {
1558                         err = idtcm_perout_enable(channel, false, &rq->perout);
1559                         if (err)
1560                                 dev_err(&channel->idtcm->client->dev,
1561                                         "Failed at line %d in func %s!\n",
1562                                         __LINE__,
1563                                         __func__);
1564                         return err;
1565                 }
1566
1567                 /* Only accept a 1-PPS aligned to the second. */
1568                 if (rq->perout.start.nsec || rq->perout.period.sec != 1 ||
1569                     rq->perout.period.nsec)
1570                         return -ERANGE;
1571
1572                 err = idtcm_perout_enable(channel, true, &rq->perout);
1573                 if (err)
1574                         dev_err(&channel->idtcm->client->dev,
1575                                 "Failed at line %d in func %s!\n",
1576                                 __LINE__,
1577                                 __func__);
1578                 return err;
1579         default:
1580                 break;
1581         }
1582
1583         return -EOPNOTSUPP;
1584 }
1585
1586 static int _enable_pll_tod_sync(struct idtcm *idtcm,
1587                                 u8 pll,
1588                                 u8 sync_src,
1589                                 u8 qn,
1590                                 u8 qn_plus_1)
1591 {
1592         int err;
1593         u8 val;
1594         u16 dpll;
1595         u16 out0 = 0, out1 = 0;
1596
1597         if ((qn == 0) && (qn_plus_1 == 0))
1598                 return 0;
1599
1600         switch (pll) {
1601         case 0:
1602                 dpll = DPLL_0;
1603                 if (qn)
1604                         out0 = OUTPUT_0;
1605                 if (qn_plus_1)
1606                         out1 = OUTPUT_1;
1607                 break;
1608         case 1:
1609                 dpll = DPLL_1;
1610                 if (qn)
1611                         out0 = OUTPUT_2;
1612                 if (qn_plus_1)
1613                         out1 = OUTPUT_3;
1614                 break;
1615         case 2:
1616                 dpll = DPLL_2;
1617                 if (qn)
1618                         out0 = OUTPUT_4;
1619                 if (qn_plus_1)
1620                         out1 = OUTPUT_5;
1621                 break;
1622         case 3:
1623                 dpll = DPLL_3;
1624                 if (qn)
1625                         out0 = OUTPUT_6;
1626                 if (qn_plus_1)
1627                         out1 = OUTPUT_7;
1628                 break;
1629         case 4:
1630                 dpll = DPLL_4;
1631                 if (qn)
1632                         out0 = OUTPUT_8;
1633                 break;
1634         case 5:
1635                 dpll = DPLL_5;
1636                 if (qn)
1637                         out0 = OUTPUT_9;
1638                 if (qn_plus_1)
1639                         out1 = OUTPUT_8;
1640                 break;
1641         case 6:
1642                 dpll = DPLL_6;
1643                 if (qn)
1644                         out0 = OUTPUT_10;
1645                 if (qn_plus_1)
1646                         out1 = OUTPUT_11;
1647                 break;
1648         case 7:
1649                 dpll = DPLL_7;
1650                 if (qn)
1651                         out0 = OUTPUT_11;
1652                 break;
1653         default:
1654                 return -EINVAL;
1655         }
1656
1657         /*
1658          * Enable OUTPUT OUT_SYNC.
1659          */
1660         if (out0) {
1661                 err = idtcm_read(idtcm, out0, OUT_CTRL_1, &val, sizeof(val));
1662
1663                 if (err)
1664                         return err;
1665
1666                 val &= ~OUT_SYNC_DISABLE;
1667
1668                 err = idtcm_write(idtcm, out0, OUT_CTRL_1, &val, sizeof(val));
1669
1670                 if (err)
1671                         return err;
1672         }
1673
1674         if (out1) {
1675                 err = idtcm_read(idtcm, out1, OUT_CTRL_1, &val, sizeof(val));
1676
1677                 if (err)
1678                         return err;
1679
1680                 val &= ~OUT_SYNC_DISABLE;
1681
1682                 err = idtcm_write(idtcm, out1, OUT_CTRL_1, &val, sizeof(val));
1683
1684                 if (err)
1685                         return err;
1686         }
1687
1688         /* enable dpll sync tod pps, must be set before dpll_mode */
1689         err = idtcm_read(idtcm, dpll, DPLL_TOD_SYNC_CFG, &val, sizeof(val));
1690         if (err)
1691                 return err;
1692
1693         val &= ~(TOD_SYNC_SOURCE_MASK << TOD_SYNC_SOURCE_SHIFT);
1694         val |= (sync_src << TOD_SYNC_SOURCE_SHIFT);
1695         val |= TOD_SYNC_EN;
1696
1697         return idtcm_write(idtcm, dpll, DPLL_TOD_SYNC_CFG, &val, sizeof(val));
1698 }
1699
1700 static int idtcm_enable_tod_sync(struct idtcm_channel *channel)
1701 {
1702         struct idtcm *idtcm = channel->idtcm;
1703
1704         u8 pll;
1705         u8 sync_src;
1706         u8 qn;
1707         u8 qn_plus_1;
1708         u8 cfg;
1709         int err = 0;
1710         u16 output_mask = channel->output_mask;
1711         u8 out8_mux = 0;
1712         u8 out11_mux = 0;
1713         u8 temp;
1714
1715         /*
1716          * set tod_out_sync_enable to 0.
1717          */
1718         err = idtcm_read(idtcm, channel->tod_n, TOD_CFG, &cfg, sizeof(cfg));
1719         if (err)
1720                 return err;
1721
1722         cfg &= ~TOD_OUT_SYNC_ENABLE;
1723
1724         err = idtcm_write(idtcm, channel->tod_n, TOD_CFG, &cfg, sizeof(cfg));
1725         if (err)
1726                 return err;
1727
1728         switch (channel->tod_n) {
1729         case TOD_0:
1730                 sync_src = 0;
1731                 break;
1732         case TOD_1:
1733                 sync_src = 1;
1734                 break;
1735         case TOD_2:
1736                 sync_src = 2;
1737                 break;
1738         case TOD_3:
1739                 sync_src = 3;
1740                 break;
1741         default:
1742                 return -EINVAL;
1743         }
1744
1745         err = idtcm_read(idtcm, 0, HW_Q8_CTRL_SPARE,
1746                          &temp, sizeof(temp));
1747         if (err)
1748                 return err;
1749
1750         if ((temp & Q9_TO_Q8_FANOUT_AND_CLOCK_SYNC_ENABLE_MASK) ==
1751             Q9_TO_Q8_FANOUT_AND_CLOCK_SYNC_ENABLE_MASK)
1752                 out8_mux = 1;
1753
1754         err = idtcm_read(idtcm, 0, HW_Q11_CTRL_SPARE,
1755                          &temp, sizeof(temp));
1756         if (err)
1757                 return err;
1758
1759         if ((temp & Q10_TO_Q11_FANOUT_AND_CLOCK_SYNC_ENABLE_MASK) ==
1760             Q10_TO_Q11_FANOUT_AND_CLOCK_SYNC_ENABLE_MASK)
1761                 out11_mux = 1;
1762
1763         for (pll = 0; pll < 8; pll++) {
1764                 qn = 0;
1765                 qn_plus_1 = 0;
1766
1767                 if (pll < 4) {
1768                         /* First 4 pll has 2 outputs */
1769                         qn = output_mask & 0x1;
1770                         output_mask = output_mask >> 1;
1771                         qn_plus_1 = output_mask & 0x1;
1772                         output_mask = output_mask >> 1;
1773                 } else if (pll == 4) {
1774                         if (out8_mux == 0) {
1775                                 qn = output_mask & 0x1;
1776                                 output_mask = output_mask >> 1;
1777                         }
1778                 } else if (pll == 5) {
1779                         if (out8_mux) {
1780                                 qn_plus_1 = output_mask & 0x1;
1781                                 output_mask = output_mask >> 1;
1782                         }
1783                         qn = output_mask & 0x1;
1784                         output_mask = output_mask >> 1;
1785                 } else if (pll == 6) {
1786                         qn = output_mask & 0x1;
1787                         output_mask = output_mask >> 1;
1788                         if (out11_mux) {
1789                                 qn_plus_1 = output_mask & 0x1;
1790                                 output_mask = output_mask >> 1;
1791                         }
1792                 } else if (pll == 7) {
1793                         if (out11_mux == 0) {
1794                                 qn = output_mask & 0x1;
1795                                 output_mask = output_mask >> 1;
1796                         }
1797                 }
1798
1799                 if ((qn != 0) || (qn_plus_1 != 0))
1800                         err = _enable_pll_tod_sync(idtcm, pll, sync_src, qn,
1801                                                qn_plus_1);
1802
1803                 if (err)
1804                         return err;
1805         }
1806
1807         return err;
1808 }
1809
1810 static int idtcm_enable_tod(struct idtcm_channel *channel)
1811 {
1812         struct idtcm *idtcm = channel->idtcm;
1813         struct timespec64 ts = {0, 0};
1814         u8 cfg;
1815         int err;
1816
1817         /*
1818          * Start the TOD clock ticking.
1819          */
1820         err = idtcm_read(idtcm, channel->tod_n, TOD_CFG, &cfg, sizeof(cfg));
1821         if (err)
1822                 return err;
1823
1824         cfg |= TOD_ENABLE;
1825
1826         err = idtcm_write(idtcm, channel->tod_n, TOD_CFG, &cfg, sizeof(cfg));
1827         if (err)
1828                 return err;
1829
1830         return _idtcm_settime(channel, &ts, HW_TOD_WR_TRIG_SEL_MSB);
1831 }
1832
1833 static void idtcm_display_version_info(struct idtcm *idtcm)
1834 {
1835         u8 major;
1836         u8 minor;
1837         u8 hotfix;
1838         u16 product_id;
1839         u8 hw_rev_id;
1840         u8 config_select;
1841         char *fmt = "%d.%d.%d, Id: 0x%04x  HW Rev: %d  OTP Config Select: %d\n";
1842
1843         idtcm_read_major_release(idtcm, &major);
1844         idtcm_read_minor_release(idtcm, &minor);
1845         idtcm_read_hotfix_release(idtcm, &hotfix);
1846
1847         idtcm_read_product_id(idtcm, &product_id);
1848         idtcm_read_hw_rev_id(idtcm, &hw_rev_id);
1849
1850         idtcm_read_otp_scsr_config_select(idtcm, &config_select);
1851
1852         snprintf(idtcm->version, sizeof(idtcm->version), "%u.%u.%u",
1853                  major, minor, hotfix);
1854
1855         dev_info(&idtcm->client->dev, fmt, major, minor, hotfix,
1856                  product_id, hw_rev_id, config_select);
1857 }
1858
1859 static const struct ptp_clock_info idtcm_caps_v487 = {
1860         .owner          = THIS_MODULE,
1861         .max_adj        = 244000,
1862         .n_per_out      = 12,
1863         .adjphase       = &idtcm_adjphase,
1864         .adjfine        = &idtcm_adjfine,
1865         .adjtime        = &idtcm_adjtime_v487,
1866         .gettime64      = &idtcm_gettime,
1867         .settime64      = &idtcm_settime_v487,
1868         .enable         = &idtcm_enable,
1869         .do_aux_work    = &set_write_phase_ready,
1870 };
1871
1872 static const struct ptp_clock_info idtcm_caps = {
1873         .owner          = THIS_MODULE,
1874         .max_adj        = 244000,
1875         .n_per_out      = 12,
1876         .adjphase       = &idtcm_adjphase,
1877         .adjfine        = &idtcm_adjfine,
1878         .adjtime        = &idtcm_adjtime,
1879         .gettime64      = &idtcm_gettime,
1880         .settime64      = &idtcm_settime,
1881         .enable         = &idtcm_enable,
1882         .do_aux_work    = &set_write_phase_ready,
1883 };
1884
1885 static int configure_channel_pll(struct idtcm_channel *channel)
1886 {
1887         int err = 0;
1888
1889         switch (channel->pll) {
1890         case 0:
1891                 channel->dpll_freq = DPLL_FREQ_0;
1892                 channel->dpll_n = DPLL_0;
1893                 channel->hw_dpll_n = HW_DPLL_0;
1894                 channel->dpll_phase = DPLL_PHASE_0;
1895                 channel->dpll_ctrl_n = DPLL_CTRL_0;
1896                 channel->dpll_phase_pull_in = DPLL_PHASE_PULL_IN_0;
1897                 break;
1898         case 1:
1899                 channel->dpll_freq = DPLL_FREQ_1;
1900                 channel->dpll_n = DPLL_1;
1901                 channel->hw_dpll_n = HW_DPLL_1;
1902                 channel->dpll_phase = DPLL_PHASE_1;
1903                 channel->dpll_ctrl_n = DPLL_CTRL_1;
1904                 channel->dpll_phase_pull_in = DPLL_PHASE_PULL_IN_1;
1905                 break;
1906         case 2:
1907                 channel->dpll_freq = DPLL_FREQ_2;
1908                 channel->dpll_n = DPLL_2;
1909                 channel->hw_dpll_n = HW_DPLL_2;
1910                 channel->dpll_phase = DPLL_PHASE_2;
1911                 channel->dpll_ctrl_n = DPLL_CTRL_2;
1912                 channel->dpll_phase_pull_in = DPLL_PHASE_PULL_IN_2;
1913                 break;
1914         case 3:
1915                 channel->dpll_freq = DPLL_FREQ_3;
1916                 channel->dpll_n = DPLL_3;
1917                 channel->hw_dpll_n = HW_DPLL_3;
1918                 channel->dpll_phase = DPLL_PHASE_3;
1919                 channel->dpll_ctrl_n = DPLL_CTRL_3;
1920                 channel->dpll_phase_pull_in = DPLL_PHASE_PULL_IN_3;
1921                 break;
1922         case 4:
1923                 channel->dpll_freq = DPLL_FREQ_4;
1924                 channel->dpll_n = DPLL_4;
1925                 channel->hw_dpll_n = HW_DPLL_4;
1926                 channel->dpll_phase = DPLL_PHASE_4;
1927                 channel->dpll_ctrl_n = DPLL_CTRL_4;
1928                 channel->dpll_phase_pull_in = DPLL_PHASE_PULL_IN_4;
1929                 break;
1930         case 5:
1931                 channel->dpll_freq = DPLL_FREQ_5;
1932                 channel->dpll_n = DPLL_5;
1933                 channel->hw_dpll_n = HW_DPLL_5;
1934                 channel->dpll_phase = DPLL_PHASE_5;
1935                 channel->dpll_ctrl_n = DPLL_CTRL_5;
1936                 channel->dpll_phase_pull_in = DPLL_PHASE_PULL_IN_5;
1937                 break;
1938         case 6:
1939                 channel->dpll_freq = DPLL_FREQ_6;
1940                 channel->dpll_n = DPLL_6;
1941                 channel->hw_dpll_n = HW_DPLL_6;
1942                 channel->dpll_phase = DPLL_PHASE_6;
1943                 channel->dpll_ctrl_n = DPLL_CTRL_6;
1944                 channel->dpll_phase_pull_in = DPLL_PHASE_PULL_IN_6;
1945                 break;
1946         case 7:
1947                 channel->dpll_freq = DPLL_FREQ_7;
1948                 channel->dpll_n = DPLL_7;
1949                 channel->hw_dpll_n = HW_DPLL_7;
1950                 channel->dpll_phase = DPLL_PHASE_7;
1951                 channel->dpll_ctrl_n = DPLL_CTRL_7;
1952                 channel->dpll_phase_pull_in = DPLL_PHASE_PULL_IN_7;
1953                 break;
1954         default:
1955                 err = -EINVAL;
1956         }
1957
1958         return err;
1959 }
1960
1961 static int idtcm_enable_channel(struct idtcm *idtcm, u32 index)
1962 {
1963         struct idtcm_channel *channel;
1964         int err;
1965
1966         if (!(index < MAX_TOD))
1967                 return -EINVAL;
1968
1969         channel = &idtcm->channel[index];
1970
1971         /* Set pll addresses */
1972         err = configure_channel_pll(channel);
1973         if (err)
1974                 return err;
1975
1976         /* Set tod addresses */
1977         switch (index) {
1978         case 0:
1979                 channel->tod_read_primary = TOD_READ_PRIMARY_0;
1980                 channel->tod_write = TOD_WRITE_0;
1981                 channel->tod_n = TOD_0;
1982                 break;
1983         case 1:
1984                 channel->tod_read_primary = TOD_READ_PRIMARY_1;
1985                 channel->tod_write = TOD_WRITE_1;
1986                 channel->tod_n = TOD_1;
1987                 break;
1988         case 2:
1989                 channel->tod_read_primary = TOD_READ_PRIMARY_2;
1990                 channel->tod_write = TOD_WRITE_2;
1991                 channel->tod_n = TOD_2;
1992                 break;
1993         case 3:
1994                 channel->tod_read_primary = TOD_READ_PRIMARY_3;
1995                 channel->tod_write = TOD_WRITE_3;
1996                 channel->tod_n = TOD_3;
1997                 break;
1998         default:
1999                 return -EINVAL;
2000         }
2001
2002         channel->idtcm = idtcm;
2003
2004         if (idtcm_strverscmp(idtcm->version, "4.8.7") >= 0)
2005                 channel->caps = idtcm_caps_v487;
2006         else
2007                 channel->caps = idtcm_caps;
2008
2009         snprintf(channel->caps.name, sizeof(channel->caps.name),
2010                  "IDT CM TOD%u", index);
2011
2012         if (idtcm_strverscmp(idtcm->version, "4.8.7") >= 0) {
2013                 err = idtcm_enable_tod_sync(channel);
2014                 if (err) {
2015                         dev_err(&idtcm->client->dev,
2016                                 "Failed at line %d in func %s!\n",
2017                                 __LINE__,
2018                                 __func__);
2019                         return err;
2020                 }
2021         }
2022
2023         err = idtcm_set_pll_mode(channel, PLL_MODE_WRITE_FREQUENCY);
2024         if (err) {
2025                 dev_err(&idtcm->client->dev,
2026                         "Failed at line %d in func %s!\n",
2027                         __LINE__,
2028                         __func__);
2029                 return err;
2030         }
2031
2032         err = idtcm_enable_tod(channel);
2033         if (err) {
2034                 dev_err(&idtcm->client->dev,
2035                         "Failed at line %d in func %s!\n",
2036                         __LINE__,
2037                         __func__);
2038                 return err;
2039         }
2040
2041         channel->ptp_clock = ptp_clock_register(&channel->caps, NULL);
2042
2043         if (IS_ERR(channel->ptp_clock)) {
2044                 err = PTR_ERR(channel->ptp_clock);
2045                 channel->ptp_clock = NULL;
2046                 return err;
2047         }
2048
2049         if (!channel->ptp_clock)
2050                 return -ENOTSUPP;
2051
2052         channel->write_phase_ready = 0;
2053
2054         dev_info(&idtcm->client->dev, "PLL%d registered as ptp%d\n",
2055                  index, channel->ptp_clock->index);
2056
2057         return 0;
2058 }
2059
2060 static void ptp_clock_unregister_all(struct idtcm *idtcm)
2061 {
2062         u8 i;
2063         struct idtcm_channel *channel;
2064
2065         for (i = 0; i < MAX_TOD; i++) {
2066
2067                 channel = &idtcm->channel[i];
2068
2069                 if (channel->ptp_clock)
2070                         ptp_clock_unregister(channel->ptp_clock);
2071         }
2072 }
2073
2074 static void set_default_masks(struct idtcm *idtcm)
2075 {
2076         idtcm->tod_mask = DEFAULT_TOD_MASK;
2077
2078         idtcm->channel[0].pll = DEFAULT_TOD0_PTP_PLL;
2079         idtcm->channel[1].pll = DEFAULT_TOD1_PTP_PLL;
2080         idtcm->channel[2].pll = DEFAULT_TOD2_PTP_PLL;
2081         idtcm->channel[3].pll = DEFAULT_TOD3_PTP_PLL;
2082
2083         idtcm->channel[0].output_mask = DEFAULT_OUTPUT_MASK_PLL0;
2084         idtcm->channel[1].output_mask = DEFAULT_OUTPUT_MASK_PLL1;
2085         idtcm->channel[2].output_mask = DEFAULT_OUTPUT_MASK_PLL2;
2086         idtcm->channel[3].output_mask = DEFAULT_OUTPUT_MASK_PLL3;
2087 }
2088
2089 static int idtcm_probe(struct i2c_client *client,
2090                        const struct i2c_device_id *id)
2091 {
2092         struct idtcm *idtcm;
2093         int err;
2094         u8 i;
2095         char *fmt = "Failed at %d in line %s with channel output %d!\n";
2096
2097         /* Unused for now */
2098         (void)id;
2099
2100         idtcm = devm_kzalloc(&client->dev, sizeof(struct idtcm), GFP_KERNEL);
2101
2102         if (!idtcm)
2103                 return -ENOMEM;
2104
2105         idtcm->client = client;
2106         idtcm->page_offset = 0xff;
2107         idtcm->calculate_overhead_flag = 0;
2108
2109         set_default_masks(idtcm);
2110
2111         mutex_init(&idtcm->reg_lock);
2112         mutex_lock(&idtcm->reg_lock);
2113
2114         idtcm_display_version_info(idtcm);
2115
2116         err = idtcm_load_firmware(idtcm, &client->dev);
2117
2118         if (err)
2119                 dev_warn(&idtcm->client->dev,
2120                          "loading firmware failed with %d\n", err);
2121
2122         if (idtcm->tod_mask) {
2123                 for (i = 0; i < MAX_TOD; i++) {
2124                         if (idtcm->tod_mask & (1 << i)) {
2125                                 err = idtcm_enable_channel(idtcm, i);
2126                                 if (err) {
2127                                         dev_err(&idtcm->client->dev,
2128                                                 fmt,
2129                                                 __LINE__,
2130                                                 __func__,
2131                                                 i);
2132                                         break;
2133                                 }
2134                         }
2135                 }
2136         } else {
2137                 dev_err(&idtcm->client->dev,
2138                         "no PLLs flagged as PHCs, nothing to do\n");
2139                 err = -ENODEV;
2140         }
2141
2142         mutex_unlock(&idtcm->reg_lock);
2143
2144         if (err) {
2145                 ptp_clock_unregister_all(idtcm);
2146                 return err;
2147         }
2148
2149         i2c_set_clientdata(client, idtcm);
2150
2151         return 0;
2152 }
2153
2154 static int idtcm_remove(struct i2c_client *client)
2155 {
2156         struct idtcm *idtcm = i2c_get_clientdata(client);
2157
2158         ptp_clock_unregister_all(idtcm);
2159
2160         mutex_destroy(&idtcm->reg_lock);
2161
2162         return 0;
2163 }
2164
2165 #ifdef CONFIG_OF
2166 static const struct of_device_id idtcm_dt_id[] = {
2167         { .compatible = "idt,8a34000" },
2168         { .compatible = "idt,8a34001" },
2169         { .compatible = "idt,8a34002" },
2170         { .compatible = "idt,8a34003" },
2171         { .compatible = "idt,8a34004" },
2172         { .compatible = "idt,8a34005" },
2173         { .compatible = "idt,8a34006" },
2174         { .compatible = "idt,8a34007" },
2175         { .compatible = "idt,8a34008" },
2176         { .compatible = "idt,8a34009" },
2177         { .compatible = "idt,8a34010" },
2178         { .compatible = "idt,8a34011" },
2179         { .compatible = "idt,8a34012" },
2180         { .compatible = "idt,8a34013" },
2181         { .compatible = "idt,8a34014" },
2182         { .compatible = "idt,8a34015" },
2183         { .compatible = "idt,8a34016" },
2184         { .compatible = "idt,8a34017" },
2185         { .compatible = "idt,8a34018" },
2186         { .compatible = "idt,8a34019" },
2187         { .compatible = "idt,8a34040" },
2188         { .compatible = "idt,8a34041" },
2189         { .compatible = "idt,8a34042" },
2190         { .compatible = "idt,8a34043" },
2191         { .compatible = "idt,8a34044" },
2192         { .compatible = "idt,8a34045" },
2193         { .compatible = "idt,8a34046" },
2194         { .compatible = "idt,8a34047" },
2195         { .compatible = "idt,8a34048" },
2196         { .compatible = "idt,8a34049" },
2197         {},
2198 };
2199 MODULE_DEVICE_TABLE(of, idtcm_dt_id);
2200 #endif
2201
2202 static const struct i2c_device_id idtcm_i2c_id[] = {
2203         { "8a34000" },
2204         { "8a34001" },
2205         { "8a34002" },
2206         { "8a34003" },
2207         { "8a34004" },
2208         { "8a34005" },
2209         { "8a34006" },
2210         { "8a34007" },
2211         { "8a34008" },
2212         { "8a34009" },
2213         { "8a34010" },
2214         { "8a34011" },
2215         { "8a34012" },
2216         { "8a34013" },
2217         { "8a34014" },
2218         { "8a34015" },
2219         { "8a34016" },
2220         { "8a34017" },
2221         { "8a34018" },
2222         { "8a34019" },
2223         { "8a34040" },
2224         { "8a34041" },
2225         { "8a34042" },
2226         { "8a34043" },
2227         { "8a34044" },
2228         { "8a34045" },
2229         { "8a34046" },
2230         { "8a34047" },
2231         { "8a34048" },
2232         { "8a34049" },
2233         {},
2234 };
2235 MODULE_DEVICE_TABLE(i2c, idtcm_i2c_id);
2236
2237 static struct i2c_driver idtcm_driver = {
2238         .driver = {
2239                 .of_match_table = of_match_ptr(idtcm_dt_id),
2240                 .name           = "idtcm",
2241         },
2242         .probe          = idtcm_probe,
2243         .remove         = idtcm_remove,
2244         .id_table       = idtcm_i2c_id,
2245 };
2246
2247 module_i2c_driver(idtcm_driver);