drivers/ptp/ptp_pch.c

   1 /*
   2  * PTP 1588 clock using the EG20T PCH
   3  *
   4  * Copyright (C) 2010 OMICRON electronics GmbH
   5  * Copyright (C) 2011-2012 LAPIS SEMICONDUCTOR Co., LTD.
   6  *
   7  * This code was derived from the IXP46X driver.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; version 2 of the License.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
  21  */
  22
  23 #include <linux/device.h>
  24 #include <linux/err.h>
  25 #include <linux/init.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/io.h>
  28 #include <linux/irq.h>
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/pci.h>
  32 #include <linux/ptp_clock_kernel.h>
  33
  34 #define STATION_ADDR_LEN        20
  35 #define PCI_DEVICE_ID_PCH_1588  0x8819
  36 #define IO_MEM_BAR 1
  37
  38 #define DEFAULT_ADDEND 0xA0000000
  39 #define TICKS_NS_SHIFT  5
  40 #define N_EXT_TS        2
  41
  42 enum pch_status {
  43         PCH_SUCCESS,
  44         PCH_INVALIDPARAM,
  45         PCH_NOTIMESTAMP,
  46         PCH_INTERRUPTMODEINUSE,
  47         PCH_FAILED,
  48         PCH_UNSUPPORTED,
  49 };
  50 /**
  51  * struct pch_ts_regs - IEEE 1588 registers
  52  */
  53 struct pch_ts_regs {
  54         u32 control;
  55         u32 event;
  56         u32 addend;
  57         u32 accum;
  58         u32 test;
  59         u32 ts_compare;
  60         u32 rsystime_lo;
  61         u32 rsystime_hi;
  62         u32 systime_lo;
  63         u32 systime_hi;
  64         u32 trgt_lo;
  65         u32 trgt_hi;
  66         u32 asms_lo;
  67         u32 asms_hi;
  68         u32 amms_lo;
  69         u32 amms_hi;
  70         u32 ch_control;
  71         u32 ch_event;
  72         u32 tx_snap_lo;
  73         u32 tx_snap_hi;
  74         u32 rx_snap_lo;
  75         u32 rx_snap_hi;
  76         u32 src_uuid_lo;
  77         u32 src_uuid_hi;
  78         u32 can_status;
  79         u32 can_snap_lo;
  80         u32 can_snap_hi;
  81         u32 ts_sel;
  82         u32 ts_st[6];
  83         u32 reserve1[14];
  84         u32 stl_max_set_en;
  85         u32 stl_max_set;
  86         u32 reserve2[13];
  87         u32 srst;
  88 };
  89
  90 #define PCH_TSC_RESET           (1 << 0)
  91 #define PCH_TSC_TTM_MASK        (1 << 1)
  92 #define PCH_TSC_ASMS_MASK       (1 << 2)
  93 #define PCH_TSC_AMMS_MASK       (1 << 3)
  94 #define PCH_TSC_PPSM_MASK       (1 << 4)
  95 #define PCH_TSE_TTIPEND         (1 << 1)
  96 #define PCH_TSE_SNS             (1 << 2)
  97 #define PCH_TSE_SNM             (1 << 3)
  98 #define PCH_TSE_PPS             (1 << 4)
  99 #define PCH_CC_MM               (1 << 0)
 100 #define PCH_CC_TA               (1 << 1)
 101
 102 #define PCH_CC_MODE_SHIFT       16
 103 #define PCH_CC_MODE_MASK        0x001F0000
 104 #define PCH_CC_VERSION          (1 << 31)
 105 #define PCH_CE_TXS              (1 << 0)
 106 #define PCH_CE_RXS              (1 << 1)
 107 #define PCH_CE_OVR              (1 << 0)
 108 #define PCH_CE_VAL              (1 << 1)
 109 #define PCH_ECS_ETH             (1 << 0)
 110
 111 #define PCH_ECS_CAN             (1 << 1)
 112 #define PCH_STATION_BYTES       6
 113
 114 #define PCH_IEEE1588_ETH        (1 << 0)
 115 #define PCH_IEEE1588_CAN        (1 << 1)
 116 /**
 117  * struct pch_dev - Driver private data
 118  */
 119 struct pch_dev {
 120         struct pch_ts_regs *regs;
 121         struct ptp_clock *ptp_clock;
 122         struct ptp_clock_info caps;
 123         int exts0_enabled;
 124         int exts1_enabled;
 125
 126         u32 mem_base;
 127         u32 mem_size;
 128         u32 irq;
 129         struct pci_dev *pdev;
 130         spinlock_t register_lock;
 131 };
 132
 133 /**
 134  * struct pch_params - 1588 module parameter
 135  */
 136 struct pch_params {
 137         u8 station[STATION_ADDR_LEN];
 138 };
 139
 140 /* structure to hold the module parameters */
 141 static struct pch_params pch_param = {
 142         "00:00:00:00:00:00"
 143 };
 144
 145 /*
 146  * Register access functions
 147  */
 148 static inline void pch_eth_enable_set(struct pch_dev *chip)
 149 {
 150         u32 val;
 151         /* SET the eth_enable bit */
 152         val = ioread32(&chip->regs->ts_sel) | (PCH_ECS_ETH);
 153         iowrite32(val, (&chip->regs->ts_sel));
 154 }
 155
 156 static u64 pch_systime_read(struct pch_ts_regs *regs)
 157 {
 158         u64 ns;
 159         u32 lo, hi;
 160
 161         lo = ioread32(&regs->systime_lo);
 162         hi = ioread32(&regs->systime_hi);
 163
 164         ns = ((u64) hi) << 32;
 165         ns |= lo;
 166         ns <<= TICKS_NS_SHIFT;
 167
 168         return ns;
 169 }
 170
 171 static void pch_systime_write(struct pch_ts_regs *regs, u64 ns)
 172 {
 173         u32 hi, lo;
 174
 175         ns >>= TICKS_NS_SHIFT;
 176         hi = ns >> 32;
 177         lo = ns & 0xffffffff;
 178
 179         iowrite32(lo, &regs->systime_lo);
 180         iowrite32(hi, &regs->systime_hi);
 181 }
 182
 183 static inline void pch_block_reset(struct pch_dev *chip)
 184 {
 185         u32 val;
 186         /* Reset Hardware Assist block */
 187         val = ioread32(&chip->regs->control) | PCH_TSC_RESET;
 188         iowrite32(val, (&chip->regs->control));
 189         val = val & ~PCH_TSC_RESET;
 190         iowrite32(val, (&chip->regs->control));
 191 }
 192
 193 u32 pch_ch_control_read(struct pci_dev *pdev)
 194 {
 195         struct pch_dev *chip = pci_get_drvdata(pdev);
 196         u32 val;
 197
 198         val = ioread32(&chip->regs->ch_control);
 199
 200         return val;
 201 }
 202 EXPORT_SYMBOL(pch_ch_control_read);
 203
 204 void pch_ch_control_write(struct pci_dev *pdev, u32 val)
 205 {
 206         struct pch_dev *chip = pci_get_drvdata(pdev);
 207
 208         iowrite32(val, (&chip->regs->ch_control));
 209 }
 210 EXPORT_SYMBOL(pch_ch_control_write);
 211
 212 u32 pch_ch_event_read(struct pci_dev *pdev)
 213 {
 214         struct pch_dev *chip = pci_get_drvdata(pdev);
 215         u32 val;
 216
 217         val = ioread32(&chip->regs->ch_event);
 218
 219         return val;
 220 }
 221 EXPORT_SYMBOL(pch_ch_event_read);
 222
 223 void pch_ch_event_write(struct pci_dev *pdev, u32 val)
 224 {
 225         struct pch_dev *chip = pci_get_drvdata(pdev);
 226
 227         iowrite32(val, (&chip->regs->ch_event));
 228 }
 229 EXPORT_SYMBOL(pch_ch_event_write);
 230
 231 u32 pch_src_uuid_lo_read(struct pci_dev *pdev)
 232 {
 233         struct pch_dev *chip = pci_get_drvdata(pdev);
 234         u32 val;
 235
 236         val = ioread32(&chip->regs->src_uuid_lo);
 237
 238         return val;
 239 }
 240 EXPORT_SYMBOL(pch_src_uuid_lo_read);
 241
 242 u32 pch_src_uuid_hi_read(struct pci_dev *pdev)
 243 {
 244         struct pch_dev *chip = pci_get_drvdata(pdev);
 245         u32 val;
 246
 247         val = ioread32(&chip->regs->src_uuid_hi);
 248
 249         return val;
 250 }
 251 EXPORT_SYMBOL(pch_src_uuid_hi_read);
 252
 253 u64 pch_rx_snap_read(struct pci_dev *pdev)
 254 {
 255         struct pch_dev *chip = pci_get_drvdata(pdev);
 256         u64 ns;
 257         u32 lo, hi;
 258
 259         lo = ioread32(&chip->regs->rx_snap_lo);
 260         hi = ioread32(&chip->regs->rx_snap_hi);
 261
 262         ns = ((u64) hi) << 32;
 263         ns |= lo;
 264
 265         return ns;
 266 }
 267 EXPORT_SYMBOL(pch_rx_snap_read);
 268
 269 u64 pch_tx_snap_read(struct pci_dev *pdev)
 270 {
 271         struct pch_dev *chip = pci_get_drvdata(pdev);
 272         u64 ns;
 273         u32 lo, hi;
 274
 275         lo = ioread32(&chip->regs->tx_snap_lo);
 276         hi = ioread32(&chip->regs->tx_snap_hi);
 277
 278         ns = ((u64) hi) << 32;
 279         ns |= lo;
 280
 281         return ns;
 282 }
 283 EXPORT_SYMBOL(pch_tx_snap_read);
 284
 285 /* This function enables all 64 bits in system time registers [high & low].
 286 This is a work-around for non continuous value in the SystemTime Register*/
 287 static void pch_set_system_time_count(struct pch_dev *chip)
 288 {
 289         iowrite32(0x01, &chip->regs->stl_max_set_en);
 290         iowrite32(0xFFFFFFFF, &chip->regs->stl_max_set);
 291         iowrite32(0x00, &chip->regs->stl_max_set_en);
 292 }
 293
 294 static void pch_reset(struct pch_dev *chip)
 295 {
 296         /* Reset Hardware Assist */
 297         pch_block_reset(chip);
 298
 299         /* enable all 32 bits in system time registers */
 300         pch_set_system_time_count(chip);
 301 }
 302
 303 /**
 304  * pch_set_station_address() - This API sets the station address used by
 305  *                                  IEEE 1588 hardware when looking at PTP
 306  *                                  traffic on the  ethernet interface
 307  * @addr:       dress which contain the column separated address to be used.
 308  */
 309 static int pch_set_station_address(u8 *addr, struct pci_dev *pdev)
 310 {
 311         s32 i;
 312         struct pch_dev *chip = pci_get_drvdata(pdev);
 313
 314         /* Verify the parameter */
 315         if ((chip->regs == 0) || addr == (u8 *)NULL) {
 316                 dev_err(&pdev->dev,
 317                         "invalid params returning PCH_INVALIDPARAM\n");
 318                 return PCH_INVALIDPARAM;
 319         }
 320         /* For all station address bytes */
 321         for (i = 0; i < PCH_STATION_BYTES; i++) {
 322                 u32 val;
 323                 s32 tmp;
 324
 325                 tmp = hex_to_bin(addr[i * 3]);
 326                 if (tmp < 0) {
 327                         dev_err(&pdev->dev,
 328                                 "invalid params returning PCH_INVALIDPARAM\n");
 329                         return PCH_INVALIDPARAM;
 330                 }
 331                 val = tmp * 16;
 332                 tmp = hex_to_bin(addr[(i * 3) + 1]);
 333                 if (tmp < 0) {
 334                         dev_err(&pdev->dev,
 335                                 "invalid params returning PCH_INVALIDPARAM\n");
 336                         return PCH_INVALIDPARAM;
 337                 }
 338                 val += tmp;
 339                 /* Expects ':' separated addresses */
 340                 if ((i < 5) && (addr[(i * 3) + 2] != ':')) {
 341                         dev_err(&pdev->dev,
 342                                 "invalid params returning PCH_INVALIDPARAM\n");
 343                         return PCH_INVALIDPARAM;
 344                 }
 345
 346                 /* Ideally we should set the address only after validating
 347                                                          entire string */
 348                 dev_dbg(&pdev->dev, "invoking pch_station_set\n");
 349                 iowrite32(val, &chip->regs->ts_st[i]);
 350         }
 351         return 0;
 352 }
 353
 354 /*
 355  * Interrupt service routine
 356  */
 357 static irqreturn_t isr(int irq, void *priv)
 358 {
 359         struct pch_dev *pch_dev = priv;
 360         struct pch_ts_regs *regs = pch_dev->regs;
 361         struct ptp_clock_event event;
 362         u32 ack = 0, lo, hi, val;
 363
 364         val = ioread32(&regs->event);
 365
 366         if (val & PCH_TSE_SNS) {
 367                 ack |= PCH_TSE_SNS;
 368                 if (pch_dev->exts0_enabled) {
 369                         hi = ioread32(&regs->asms_hi);
 370                         lo = ioread32(&regs->asms_lo);
 371                         event.type = PTP_CLOCK_EXTTS;
 372                         event.index = 0;
 373                         event.timestamp = ((u64) hi) << 32;
 374                         event.timestamp |= lo;
 375                         event.timestamp <<= TICKS_NS_SHIFT;
 376                         ptp_clock_event(pch_dev->ptp_clock, &event);
 377                 }
 378         }
 379
 380         if (val & PCH_TSE_SNM) {
 381                 ack |= PCH_TSE_SNM;
 382                 if (pch_dev->exts1_enabled) {
 383                         hi = ioread32(&regs->amms_hi);
 384                         lo = ioread32(&regs->amms_lo);
 385                         event.type = PTP_CLOCK_EXTTS;
 386                         event.index = 1;
 387                         event.timestamp = ((u64) hi) << 32;
 388                         event.timestamp |= lo;
 389                         event.timestamp <<= TICKS_NS_SHIFT;
 390                         ptp_clock_event(pch_dev->ptp_clock, &event);
 391                 }
 392         }
 393
 394         if (val & PCH_TSE_TTIPEND)
 395                 ack |= PCH_TSE_TTIPEND; /* this bit seems to be always set */
 396
 397         if (ack) {
 398                 iowrite32(ack, &regs->event);
 399                 return IRQ_HANDLED;
 400         } else
 401                 return IRQ_NONE;
 402 }
 403
 404 /*
 405  * PTP clock operations
 406  */
 407
 408 static int ptp_pch_adjfreq(struct ptp_clock_info *ptp, s32 ppb)
 409 {
 410         u64 adj;
 411         u32 diff, addend;
 412         int neg_adj = 0;
 413         struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps);
 414         struct pch_ts_regs *regs = pch_dev->regs;
 415
 416         if (ppb < 0) {
 417                 neg_adj = 1;
 418                 ppb = -ppb;
 419         }
 420         addend = DEFAULT_ADDEND;
 421         adj = addend;
 422         adj *= ppb;
 423         diff = div_u64(adj, 1000000000ULL);
 424
 425         addend = neg_adj ? addend - diff : addend + diff;
 426
 427         iowrite32(addend, &regs->addend);
 428
 429         return 0;
 430 }
 431
 432 static int ptp_pch_adjtime(struct ptp_clock_info *ptp, s64 delta)
 433 {
 434         s64 now;
 435         unsigned long flags;
 436         struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps);
 437         struct pch_ts_regs *regs = pch_dev->regs;
 438
 439         spin_lock_irqsave(&pch_dev->register_lock, flags);
 440         now = pch_systime_read(regs);
 441         now += delta;
 442         pch_systime_write(regs, now);
 443         spin_unlock_irqrestore(&pch_dev->register_lock, flags);
 444
 445         return 0;
 446 }
 447
 448 static int ptp_pch_gettime(struct ptp_clock_info *ptp, struct timespec *ts)
 449 {
 450         u64 ns;
 451         u32 remainder;
 452         unsigned long flags;
 453         struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps);
 454         struct pch_ts_regs *regs = pch_dev->regs;
 455
 456         spin_lock_irqsave(&pch_dev->register_lock, flags);
 457         ns = pch_systime_read(regs);
 458         spin_unlock_irqrestore(&pch_dev->register_lock, flags);
 459
 460         ts->tv_sec = div_u64_rem(ns, 1000000000, &remainder);
 461         ts->tv_nsec = remainder;
 462         return 0;
 463 }
 464
 465 static int ptp_pch_settime(struct ptp_clock_info *ptp,
 466                            const struct timespec *ts)
 467 {
 468         u64 ns;
 469         unsigned long flags;
 470         struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps);
 471         struct pch_ts_regs *regs = pch_dev->regs;
 472
 473         ns = ts->tv_sec * 1000000000ULL;
 474         ns += ts->tv_nsec;
 475
 476         spin_lock_irqsave(&pch_dev->register_lock, flags);
 477         pch_systime_write(regs, ns);
 478         spin_unlock_irqrestore(&pch_dev->register_lock, flags);
 479
 480         return 0;
 481 }
 482
 483 static int ptp_pch_enable(struct ptp_clock_info *ptp,
 484                           struct ptp_clock_request *rq, int on)
 485 {
 486         struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps);
 487
 488         switch (rq->type) {
 489         case PTP_CLK_REQ_EXTTS:
 490                 switch (rq->extts.index) {
 491                 case 0:
 492                         pch_dev->exts0_enabled = on ? 1 : 0;
 493                         break;
 494                 case 1:
 495                         pch_dev->exts1_enabled = on ? 1 : 0;
 496                         break;
 497                 default:
 498                         return -EINVAL;
 499                 }
 500                 return 0;
 501         default:
 502                 break;
 503         }
 504
 505         return -EOPNOTSUPP;
 506 }
 507
 508 static struct ptp_clock_info ptp_pch_caps = {
 509         .owner          = THIS_MODULE,
 510         .name           = "PCH timer",
 511         .max_adj        = 50000000,
 512         .n_ext_ts       = N_EXT_TS,
 513         .pps            = 0,
 514         .adjfreq        = ptp_pch_adjfreq,
 515         .adjtime        = ptp_pch_adjtime,
 516         .gettime        = ptp_pch_gettime,
 517         .settime        = ptp_pch_settime,
 518         .enable         = ptp_pch_enable,
 519 };
 520
 521
 522 #ifdef CONFIG_PM
 523 static s32 pch_suspend(struct pci_dev *pdev, pm_message_t state)
 524 {
 525         pci_disable_device(pdev);
 526         pci_enable_wake(pdev, PCI_D3hot, 0);
 527
 528         if (pci_save_state(pdev) != 0) {
 529                 dev_err(&pdev->dev, "could not save PCI config state\n");
 530                 return -ENOMEM;
 531         }
 532         pci_set_power_state(pdev, pci_choose_state(pdev, state));
 533
 534         return 0;
 535 }
 536
 537 static s32 pch_resume(struct pci_dev *pdev)
 538 {
 539         s32 ret;
 540
 541         pci_set_power_state(pdev, PCI_D0);
 542         pci_restore_state(pdev);
 543         ret = pci_enable_device(pdev);
 544         if (ret) {
 545                 dev_err(&pdev->dev, "pci_enable_device failed\n");
 546                 return ret;
 547         }
 548         pci_enable_wake(pdev, PCI_D3hot, 0);
 549         return 0;
 550 }
 551 #else
 552 #define pch_suspend NULL
 553 #define pch_resume NULL
 554 #endif
 555
 556 static void __devexit pch_remove(struct pci_dev *pdev)
 557 {
 558         struct pch_dev *chip = pci_get_drvdata(pdev);
 559
 560         ptp_clock_unregister(chip->ptp_clock);
 561         /* free the interrupt */
 562         if (pdev->irq != 0)
 563                 free_irq(pdev->irq, chip);
 564
 565         /* unmap the virtual IO memory space */
 566         if (chip->regs != 0) {
 567                 iounmap(chip->regs);
 568                 chip->regs = 0;
 569         }
 570         /* release the reserved IO memory space */
 571         if (chip->mem_base != 0) {
 572                 release_mem_region(chip->mem_base, chip->mem_size);
 573                 chip->mem_base = 0;
 574         }
 575         pci_disable_device(pdev);
 576         kfree(chip);
 577         dev_info(&pdev->dev, "complete\n");
 578 }
 579
 580 static s32 __devinit
 581 pch_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 582 {
 583         s32 ret;
 584         unsigned long flags;
 585         struct pch_dev *chip;
 586
 587         chip = kzalloc(sizeof(struct pch_dev), GFP_KERNEL);
 588         if (chip == NULL)
 589                 return -ENOMEM;
 590
 591         /* enable the 1588 pci device */
 592         ret = pci_enable_device(pdev);
 593         if (ret != 0) {
 594                 dev_err(&pdev->dev, "could not enable the pci device\n");
 595                 goto err_pci_en;
 596         }
 597
 598         chip->mem_base = pci_resource_start(pdev, IO_MEM_BAR);
 599         if (!chip->mem_base) {
 600                 dev_err(&pdev->dev, "could not locate IO memory address\n");
 601                 ret = -ENODEV;
 602                 goto err_pci_start;
 603         }
 604
 605         /* retrieve the available length of the IO memory space */
 606         chip->mem_size = pci_resource_len(pdev, IO_MEM_BAR);
 607
 608         /* allocate the memory for the device registers */
 609         if (!request_mem_region(chip->mem_base, chip->mem_size, "1588_regs")) {
 610                 dev_err(&pdev->dev,
 611                         "could not allocate register memory space\n");
 612                 ret = -EBUSY;
 613                 goto err_req_mem_region;
 614         }
 615
 616         /* get the virtual address to the 1588 registers */
 617         chip->regs = ioremap(chip->mem_base, chip->mem_size);
 618
 619         if (!chip->regs) {
 620                 dev_err(&pdev->dev, "Could not get virtual address\n");
 621                 ret = -ENOMEM;
 622                 goto err_ioremap;
 623         }
 624
 625         chip->caps = ptp_pch_caps;
 626         chip->ptp_clock = ptp_clock_register(&chip->caps);
 627
 628         if (IS_ERR(chip->ptp_clock))
 629                 return PTR_ERR(chip->ptp_clock);
 630
 631         spin_lock_init(&chip->register_lock);
 632
 633         ret = request_irq(pdev->irq, &isr, IRQF_SHARED, KBUILD_MODNAME, chip);
 634         if (ret != 0) {
 635                 dev_err(&pdev->dev, "failed to get irq %d\n", pdev->irq);
 636                 goto err_req_irq;
 637         }
 638
 639         /* indicate success */
 640         chip->irq = pdev->irq;
 641         chip->pdev = pdev;
 642         pci_set_drvdata(pdev, chip);
 643
 644         spin_lock_irqsave(&chip->register_lock, flags);
 645         /* reset the ieee1588 h/w */
 646         pch_reset(chip);
 647
 648         iowrite32(DEFAULT_ADDEND, &chip->regs->addend);
 649         iowrite32(1, &chip->regs->trgt_lo);
 650         iowrite32(0, &chip->regs->trgt_hi);
 651         iowrite32(PCH_TSE_TTIPEND, &chip->regs->event);
 652         /* Version: IEEE1588 v1 and IEEE1588-2008,  Mode: All Evwnt, Locked  */
 653         iowrite32(0x80020000, &chip->regs->ch_control);
 654
 655         pch_eth_enable_set(chip);
 656
 657         if (strcmp(pch_param.station, "00:00:00:00:00:00") != 0) {
 658                 if (pch_set_station_address(pch_param.station, pdev) != 0) {
 659                         dev_err(&pdev->dev,
 660                         "Invalid station address parameter\n"
 661                         "Module loaded but station address not set correctly\n"
 662                         );
 663                 }
 664         }
 665         spin_unlock_irqrestore(&chip->register_lock, flags);
 666         return 0;
 667
 668 err_req_irq:
 669         ptp_clock_unregister(chip->ptp_clock);
 670         iounmap(chip->regs);
 671         chip->regs = 0;
 672
 673 err_ioremap:
 674         release_mem_region(chip->mem_base, chip->mem_size);
 675
 676 err_req_mem_region:
 677         chip->mem_base = 0;
 678
 679 err_pci_start:
 680         pci_disable_device(pdev);
 681
 682 err_pci_en:
 683         kfree(chip);
 684         dev_err(&pdev->dev, "probe failed(ret=0x%x)\n", ret);
 685
 686         return ret;
 687 }
 688
 689 static DEFINE_PCI_DEVICE_TABLE(pch_ieee1588_pcidev_id) = {
 690         {
 691           .vendor = PCI_VENDOR_ID_INTEL,
 692           .device = PCI_DEVICE_ID_PCH_1588
 693          },
 694         {0}
 695 };
 696
 697 static struct pci_driver pch_driver = {
 698         .name = KBUILD_MODNAME,
 699         .id_table = pch_ieee1588_pcidev_id,
 700         .probe = pch_probe,
 701         .remove = pch_remove,
 702         .suspend = pch_suspend,
 703         .resume = pch_resume,
 704 };
 705
 706 static void __exit ptp_pch_exit(void)
 707 {
 708         pci_unregister_driver(&pch_driver);
 709 }
 710
 711 static s32 __init ptp_pch_init(void)
 712 {
 713         s32 ret;
 714
 715         /* register the driver with the pci core */
 716         ret = pci_register_driver(&pch_driver);
 717
 718         return ret;
 719 }
 720
 721 module_init(ptp_pch_init);
 722 module_exit(ptp_pch_exit);
 723
 724 module_param_string(station, pch_param.station, sizeof pch_param.station, 0444);
 725 MODULE_PARM_DESC(station,
 726          "IEEE 1588 station address to use - column separated hex values");
 727
 728 MODULE_AUTHOR("LAPIS SEMICONDUCTOR, <tshimizu818@gmail.com>");
 729 MODULE_DESCRIPTION("PTP clock using the EG20T timer");
 730 MODULE_LICENSE("GPL");