drivers/ata/sata_inic162x.c

   1 /*
   2  * sata_inic162x.c - Driver for Initio 162x SATA controllers
   3  *
   4  * Copyright 2006  SUSE Linux Products GmbH
   5  * Copyright 2006  Tejun Heo <teheo@novell.com>
   6  *
   7  * This file is released under GPL v2.
   8  *
   9  * This controller is eccentric and easily locks up if something isn't
  10  * right.  Documentation is available at initio's website but it only
  11  * documents registers (not programming model).
  12  *
  13  * - ATA disks work.
  14  * - Hotplug works.
  15  * - ATAPI read works but burning doesn't.  This thing is really
  16  *   peculiar about ATAPI and I couldn't figure out how ATAPI PIO and
  17  *   ATAPI DMA WRITE should be programmed.  If you've got a clue, be
  18  *   my guest.
  19  * - Both STR and STD work.
  20  */
  21
  22 #include <linux/kernel.h>
  23 #include <linux/module.h>
  24 #include <linux/pci.h>
  25 #include <scsi/scsi_host.h>
  26 #include <linux/libata.h>
  27 #include <linux/blkdev.h>
  28 #include <scsi/scsi_device.h>
  29
  30 #define DRV_NAME        "sata_inic162x"
  31 #define DRV_VERSION     "0.3"
  32
  33 enum {
  34         MMIO_BAR                = 5,
  35
  36         NR_PORTS                = 2,
  37
  38         HOST_CTL                = 0x7c,
  39         HOST_STAT               = 0x7e,
  40         HOST_IRQ_STAT           = 0xbc,
  41         HOST_IRQ_MASK           = 0xbe,
  42
  43         PORT_SIZE               = 0x40,
  44
  45         /* registers for ATA TF operation */
  46         PORT_TF                 = 0x00,
  47         PORT_ALT_STAT           = 0x08,
  48         PORT_IRQ_STAT           = 0x09,
  49         PORT_IRQ_MASK           = 0x0a,
  50         PORT_PRD_CTL            = 0x0b,
  51         PORT_PRD_ADDR           = 0x0c,
  52         PORT_PRD_XFERLEN        = 0x10,
  53
  54         /* IDMA register */
  55         PORT_IDMA_CTL           = 0x14,
  56
  57         PORT_SCR                = 0x20,
  58
  59         /* HOST_CTL bits */
  60         HCTL_IRQOFF             = (1 << 8),  /* global IRQ off */
  61         HCTL_PWRDWN             = (1 << 13), /* power down PHYs */
  62         HCTL_SOFTRST            = (1 << 13), /* global reset (no phy reset) */
  63         HCTL_RPGSEL             = (1 << 15), /* register page select */
  64
  65         HCTL_KNOWN_BITS         = HCTL_IRQOFF | HCTL_PWRDWN | HCTL_SOFTRST |
  66                                   HCTL_RPGSEL,
  67
  68         /* HOST_IRQ_(STAT|MASK) bits */
  69         HIRQ_PORT0              = (1 << 0),
  70         HIRQ_PORT1              = (1 << 1),
  71         HIRQ_SOFT               = (1 << 14),
  72         HIRQ_GLOBAL             = (1 << 15), /* STAT only */
  73
  74         /* PORT_IRQ_(STAT|MASK) bits */
  75         PIRQ_OFFLINE            = (1 << 0),  /* device unplugged */
  76         PIRQ_ONLINE             = (1 << 1),  /* device plugged */
  77         PIRQ_COMPLETE           = (1 << 2),  /* completion interrupt */
  78         PIRQ_FATAL              = (1 << 3),  /* fatal error */
  79         PIRQ_ATA                = (1 << 4),  /* ATA interrupt */
  80         PIRQ_REPLY              = (1 << 5),  /* reply FIFO not empty */
  81         PIRQ_PENDING            = (1 << 7),  /* port IRQ pending (STAT only) */
  82
  83         PIRQ_ERR                = PIRQ_OFFLINE | PIRQ_ONLINE | PIRQ_FATAL,
  84
  85         PIRQ_MASK_DMA_READ      = PIRQ_REPLY | PIRQ_ATA,
  86         PIRQ_MASK_OTHER         = PIRQ_REPLY | PIRQ_COMPLETE,
  87         PIRQ_MASK_FREEZE        = 0xff,
  88
  89         /* PORT_PRD_CTL bits */
  90         PRD_CTL_START           = (1 << 0),
  91         PRD_CTL_WR              = (1 << 3),
  92         PRD_CTL_DMAEN           = (1 << 7),  /* DMA enable */
  93
  94         /* PORT_IDMA_CTL bits */
  95         IDMA_CTL_RST_ATA        = (1 << 2),  /* hardreset ATA bus */
  96         IDMA_CTL_RST_IDMA       = (1 << 5),  /* reset IDMA machinary */
  97         IDMA_CTL_GO             = (1 << 7),  /* IDMA mode go */
  98         IDMA_CTL_ATA_NIEN       = (1 << 8),  /* ATA IRQ disable */
  99 };
 100
 101 struct inic_host_priv {
 102         u16     cached_hctl;
 103 };
 104
 105 struct inic_port_priv {
 106         u8      dfl_prdctl;
 107         u8      cached_prdctl;
 108         u8      cached_pirq_mask;
 109 };
 110
 111 static int inic_slave_config(struct scsi_device *sdev)
 112 {
 113         /* This controller is braindamaged.  dma_boundary is 0xffff
 114          * like others but it will lock up the whole machine HARD if
 115          * 65536 byte PRD entry is fed.  Reduce maximum segment size.
 116          */
 117         blk_queue_max_segment_size(sdev->request_queue, 65536 - 512);
 118
 119         return ata_scsi_slave_config(sdev);
 120 }
 121
 122 static struct scsi_host_template inic_sht = {
 123         .module                 = THIS_MODULE,
 124         .name                   = DRV_NAME,
 125         .ioctl                  = ata_scsi_ioctl,
 126         .queuecommand           = ata_scsi_queuecmd,
 127         .can_queue              = ATA_DEF_QUEUE,
 128         .this_id                = ATA_SHT_THIS_ID,
 129         .sg_tablesize           = LIBATA_MAX_PRD,
 130         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 131         .emulated               = ATA_SHT_EMULATED,
 132         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 133         .proc_name              = DRV_NAME,
 134         .dma_boundary           = ATA_DMA_BOUNDARY,
 135         .slave_configure        = inic_slave_config,
 136         .slave_destroy          = ata_scsi_slave_destroy,
 137         .bios_param             = ata_std_bios_param,
 138 };
 139
 140 static const int scr_map[] = {
 141         [SCR_STATUS]    = 0,
 142         [SCR_ERROR]     = 1,
 143         [SCR_CONTROL]   = 2,
 144 };
 145
 146 static void __iomem * inic_port_base(struct ata_port *ap)
 147 {
 148         return ap->host->iomap[MMIO_BAR] + ap->port_no * PORT_SIZE;
 149 }
 150
 151 static void __inic_set_pirq_mask(struct ata_port *ap, u8 mask)
 152 {
 153         void __iomem *port_base = inic_port_base(ap);
 154         struct inic_port_priv *pp = ap->private_data;
 155
 156         writeb(mask, port_base + PORT_IRQ_MASK);
 157         pp->cached_pirq_mask = mask;
 158 }
 159
 160 static void inic_set_pirq_mask(struct ata_port *ap, u8 mask)
 161 {
 162         struct inic_port_priv *pp = ap->private_data;
 163
 164         if (pp->cached_pirq_mask != mask)
 165                 __inic_set_pirq_mask(ap, mask);
 166 }
 167
 168 static void inic_reset_port(void __iomem *port_base)
 169 {
 170         void __iomem *idma_ctl = port_base + PORT_IDMA_CTL;
 171         u16 ctl;
 172
 173         ctl = readw(idma_ctl);
 174         ctl &= ~(IDMA_CTL_RST_IDMA | IDMA_CTL_ATA_NIEN | IDMA_CTL_GO);
 175
 176         /* mask IRQ and assert reset */
 177         writew(ctl | IDMA_CTL_RST_IDMA | IDMA_CTL_ATA_NIEN, idma_ctl);
 178         readw(idma_ctl); /* flush */
 179
 180         /* give it some time */
 181         msleep(1);
 182
 183         /* release reset */
 184         writew(ctl | IDMA_CTL_ATA_NIEN, idma_ctl);
 185
 186         /* clear irq */
 187         writeb(0xff, port_base + PORT_IRQ_STAT);
 188
 189         /* reenable ATA IRQ, turn off IDMA mode */
 190         writew(ctl, idma_ctl);
 191 }
 192
 193 static int inic_scr_read(struct ata_port *ap, unsigned sc_reg, u32 *val)
 194 {
 195         void __iomem *scr_addr = ap->ioaddr.scr_addr;
 196         void __iomem *addr;
 197
 198         if (unlikely(sc_reg >= ARRAY_SIZE(scr_map)))
 199                 return -EINVAL;
 200
 201         addr = scr_addr + scr_map[sc_reg] * 4;
 202         *val = readl(scr_addr + scr_map[sc_reg] * 4);
 203
 204         /* this controller has stuck DIAG.N, ignore it */
 205         if (sc_reg == SCR_ERROR)
 206                 *val &= ~SERR_PHYRDY_CHG;
 207         return 0;
 208 }
 209
 210 static int inic_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val)
 211 {
 212         void __iomem *scr_addr = ap->ioaddr.scr_addr;
 213         void __iomem *addr;
 214
 215         if (unlikely(sc_reg >= ARRAY_SIZE(scr_map)))
 216                 return -EINVAL;
 217
 218         addr = scr_addr + scr_map[sc_reg] * 4;
 219         writel(val, scr_addr + scr_map[sc_reg] * 4);
 220         return 0;
 221 }
 222
 223 /*
 224  * In TF mode, inic162x is very similar to SFF device.  TF registers
 225  * function the same.  DMA engine behaves similary using the same PRD
 226  * format as BMDMA but different command register, interrupt and event
 227  * notification methods are used.  The following inic_bmdma_*()
 228  * functions do the impedance matching.
 229  */
 230 static void inic_bmdma_setup(struct ata_queued_cmd *qc)
 231 {
 232         struct ata_port *ap = qc->ap;
 233         struct inic_port_priv *pp = ap->private_data;
 234         void __iomem *port_base = inic_port_base(ap);
 235         int rw = qc->tf.flags & ATA_TFLAG_WRITE;
 236
 237         /* make sure device sees PRD table writes */
 238         wmb();
 239
 240         /* load transfer length */
 241         writel(qc->nbytes, port_base + PORT_PRD_XFERLEN);
 242
 243         /* turn on DMA and specify data direction */
 244         pp->cached_prdctl = pp->dfl_prdctl | PRD_CTL_DMAEN;
 245         if (!rw)
 246                 pp->cached_prdctl |= PRD_CTL_WR;
 247         writeb(pp->cached_prdctl, port_base + PORT_PRD_CTL);
 248
 249         /* issue r/w command */
 250         ap->ops->exec_command(ap, &qc->tf);
 251 }
 252
 253 static void inic_bmdma_start(struct ata_queued_cmd *qc)
 254 {
 255         struct ata_port *ap = qc->ap;
 256         struct inic_port_priv *pp = ap->private_data;
 257         void __iomem *port_base = inic_port_base(ap);
 258
 259         /* start host DMA transaction */
 260         pp->cached_prdctl |= PRD_CTL_START;
 261         writeb(pp->cached_prdctl, port_base + PORT_PRD_CTL);
 262 }
 263
 264 static void inic_bmdma_stop(struct ata_queued_cmd *qc)
 265 {
 266         struct ata_port *ap = qc->ap;
 267         struct inic_port_priv *pp = ap->private_data;
 268         void __iomem *port_base = inic_port_base(ap);
 269
 270         /* stop DMA engine */
 271         writeb(pp->dfl_prdctl, port_base + PORT_PRD_CTL);
 272 }
 273
 274 static u8 inic_bmdma_status(struct ata_port *ap)
 275 {
 276         /* event is already verified by the interrupt handler */
 277         return ATA_DMA_INTR;
 278 }
 279
 280 static void inic_irq_clear(struct ata_port *ap)
 281 {
 282         /* noop */
 283 }
 284
 285 static void inic_host_intr(struct ata_port *ap)
 286 {
 287         void __iomem *port_base = inic_port_base(ap);
 288         struct ata_eh_info *ehi = &ap->link.eh_info;
 289         u8 irq_stat;
 290
 291         /* fetch and clear irq */
 292         irq_stat = readb(port_base + PORT_IRQ_STAT);
 293         writeb(irq_stat, port_base + PORT_IRQ_STAT);
 294
 295         if (likely(!(irq_stat & PIRQ_ERR))) {
 296                 struct ata_queued_cmd *qc =
 297                         ata_qc_from_tag(ap, ap->link.active_tag);
 298
 299                 if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
 300                         ata_chk_status(ap);     /* clear ATA interrupt */
 301                         return;
 302                 }
 303
 304                 if (likely(ata_host_intr(ap, qc)))
 305                         return;
 306
 307                 ata_chk_status(ap);     /* clear ATA interrupt */
 308                 ata_port_printk(ap, KERN_WARNING, "unhandled "
 309                                 "interrupt, irq_stat=%x\n", irq_stat);
 310                 return;
 311         }
 312
 313         /* error */
 314         ata_ehi_push_desc(ehi, "irq_stat=0x%x", irq_stat);
 315
 316         if (irq_stat & (PIRQ_OFFLINE | PIRQ_ONLINE)) {
 317                 ata_ehi_hotplugged(ehi);
 318                 ata_port_freeze(ap);
 319         } else
 320                 ata_port_abort(ap);
 321 }
 322
 323 static irqreturn_t inic_interrupt(int irq, void *dev_instance)
 324 {
 325         struct ata_host *host = dev_instance;
 326         void __iomem *mmio_base = host->iomap[MMIO_BAR];
 327         u16 host_irq_stat;
 328         int i, handled = 0;;
 329
 330         host_irq_stat = readw(mmio_base + HOST_IRQ_STAT);
 331
 332         if (unlikely(!(host_irq_stat & HIRQ_GLOBAL)))
 333                 goto out;
 334
 335         spin_lock(&host->lock);
 336
 337         for (i = 0; i < NR_PORTS; i++) {
 338                 struct ata_port *ap = host->ports[i];
 339
 340                 if (!(host_irq_stat & (HIRQ_PORT0 << i)))
 341                         continue;
 342
 343                 if (likely(ap && !(ap->flags & ATA_FLAG_DISABLED))) {
 344                         inic_host_intr(ap);
 345                         handled++;
 346                 } else {
 347                         if (ata_ratelimit())
 348                                 dev_printk(KERN_ERR, host->dev, "interrupt "
 349                                            "from disabled port %d (0x%x)\n",
 350                                            i, host_irq_stat);
 351                 }
 352         }
 353
 354         spin_unlock(&host->lock);
 355
 356  out:
 357         return IRQ_RETVAL(handled);
 358 }
 359
 360 static unsigned int inic_qc_issue(struct ata_queued_cmd *qc)
 361 {
 362         struct ata_port *ap = qc->ap;
 363
 364         /* ATA IRQ doesn't wait for DMA transfer completion and vice
 365          * versa.  Mask IRQ selectively to detect command completion.
 366          * Without it, ATA DMA read command can cause data corruption.
 367          *
 368          * Something similar might be needed for ATAPI writes.  I
 369          * tried a lot of combinations but couldn't find the solution.
 370          */
 371         if (qc->tf.protocol == ATA_PROT_DMA &&
 372             !(qc->tf.flags & ATA_TFLAG_WRITE))
 373                 inic_set_pirq_mask(ap, PIRQ_MASK_DMA_READ);
 374         else
 375                 inic_set_pirq_mask(ap, PIRQ_MASK_OTHER);
 376
 377         /* Issuing a command to yet uninitialized port locks up the
 378          * controller.  Most of the time, this happens for the first
 379          * command after reset which are ATA and ATAPI IDENTIFYs.
 380          * Fast fail if stat is 0x7f or 0xff for those commands.
 381          */
 382         if (unlikely(qc->tf.command == ATA_CMD_ID_ATA ||
 383                      qc->tf.command == ATA_CMD_ID_ATAPI)) {
 384                 u8 stat = ata_chk_status(ap);
 385                 if (stat == 0x7f || stat == 0xff)
 386                         return AC_ERR_HSM;
 387         }
 388
 389         return ata_qc_issue_prot(qc);
 390 }
 391
 392 static void inic_freeze(struct ata_port *ap)
 393 {
 394         void __iomem *port_base = inic_port_base(ap);
 395
 396         __inic_set_pirq_mask(ap, PIRQ_MASK_FREEZE);
 397
 398         ata_chk_status(ap);
 399         writeb(0xff, port_base + PORT_IRQ_STAT);
 400
 401         readb(port_base + PORT_IRQ_STAT); /* flush */
 402 }
 403
 404 static void inic_thaw(struct ata_port *ap)
 405 {
 406         void __iomem *port_base = inic_port_base(ap);
 407
 408         ata_chk_status(ap);
 409         writeb(0xff, port_base + PORT_IRQ_STAT);
 410
 411         __inic_set_pirq_mask(ap, PIRQ_MASK_OTHER);
 412
 413         readb(port_base + PORT_IRQ_STAT); /* flush */
 414 }
 415
 416 /*
 417  * SRST and SControl hardreset don't give valid signature on this
 418  * controller.  Only controller specific hardreset mechanism works.
 419  */
 420 static int inic_hardreset(struct ata_link *link, unsigned int *class,
 421                           unsigned long deadline)
 422 {
 423         struct ata_port *ap = link->ap;
 424         void __iomem *port_base = inic_port_base(ap);
 425         void __iomem *idma_ctl = port_base + PORT_IDMA_CTL;
 426         const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
 427         u16 val;
 428         int rc;
 429
 430         /* hammer it into sane state */
 431         inic_reset_port(port_base);
 432
 433         val = readw(idma_ctl);
 434         writew(val | IDMA_CTL_RST_ATA, idma_ctl);
 435         readw(idma_ctl);        /* flush */
 436         msleep(1);
 437         writew(val & ~IDMA_CTL_RST_ATA, idma_ctl);
 438
 439         rc = sata_link_resume(link, timing, deadline);
 440         if (rc) {
 441                 ata_link_printk(link, KERN_WARNING, "failed to resume "
 442                                 "link after reset (errno=%d)\n", rc);
 443                 return rc;
 444         }
 445
 446         *class = ATA_DEV_NONE;
 447         if (ata_link_online(link)) {
 448                 struct ata_taskfile tf;
 449
 450                 /* wait a while before checking status */
 451                 msleep(150);
 452
 453                 rc = ata_wait_ready(ap, deadline);
 454                 /* link occupied, -ENODEV too is an error */
 455                 if (rc) {
 456                         ata_link_printk(link, KERN_WARNING, "device not ready "
 457                                         "after hardreset (errno=%d)\n", rc);
 458                         return rc;
 459                 }
 460
 461                 ata_tf_read(ap, &tf);
 462                 *class = ata_dev_classify(&tf);
 463                 if (*class == ATA_DEV_UNKNOWN)
 464                         *class = ATA_DEV_NONE;
 465         }
 466
 467         return 0;
 468 }
 469
 470 static void inic_error_handler(struct ata_port *ap)
 471 {
 472         void __iomem *port_base = inic_port_base(ap);
 473         struct inic_port_priv *pp = ap->private_data;
 474         unsigned long flags;
 475
 476         /* reset PIO HSM and stop DMA engine */
 477         inic_reset_port(port_base);
 478
 479         spin_lock_irqsave(ap->lock, flags);
 480         ap->hsm_task_state = HSM_ST_IDLE;
 481         writeb(pp->dfl_prdctl, port_base + PORT_PRD_CTL);
 482         spin_unlock_irqrestore(ap->lock, flags);
 483
 484         /* PIO and DMA engines have been stopped, perform recovery */
 485         ata_do_eh(ap, ata_std_prereset, NULL, inic_hardreset,
 486                   ata_std_postreset);
 487 }
 488
 489 static void inic_post_internal_cmd(struct ata_queued_cmd *qc)
 490 {
 491         /* make DMA engine forget about the failed command */
 492         if (qc->flags & ATA_QCFLAG_FAILED)
 493                 inic_reset_port(inic_port_base(qc->ap));
 494 }
 495
 496 static void inic_dev_config(struct ata_device *dev)
 497 {
 498         /* inic can only handle upto LBA28 max sectors */
 499         if (dev->max_sectors > ATA_MAX_SECTORS)
 500                 dev->max_sectors = ATA_MAX_SECTORS;
 501
 502         if (dev->n_sectors >= 1 << 28) {
 503                 ata_dev_printk(dev, KERN_ERR,
 504         "ERROR: This driver doesn't support LBA48 yet and may cause\n"
 505         "                data corruption on such devices.  Disabling.\n");
 506                 ata_dev_disable(dev);
 507         }
 508 }
 509
 510 static void init_port(struct ata_port *ap)
 511 {
 512         void __iomem *port_base = inic_port_base(ap);
 513
 514         /* Setup PRD address */
 515         writel(ap->prd_dma, port_base + PORT_PRD_ADDR);
 516 }
 517
 518 static int inic_port_resume(struct ata_port *ap)
 519 {
 520         init_port(ap);
 521         return 0;
 522 }
 523
 524 static int inic_port_start(struct ata_port *ap)
 525 {
 526         void __iomem *port_base = inic_port_base(ap);
 527         struct inic_port_priv *pp;
 528         u8 tmp;
 529         int rc;
 530
 531         /* alloc and initialize private data */
 532         pp = devm_kzalloc(ap->host->dev, sizeof(*pp), GFP_KERNEL);
 533         if (!pp)
 534                 return -ENOMEM;
 535         ap->private_data = pp;
 536
 537         /* default PRD_CTL value, DMAEN, WR and START off */
 538         tmp = readb(port_base + PORT_PRD_CTL);
 539         tmp &= ~(PRD_CTL_DMAEN | PRD_CTL_WR | PRD_CTL_START);
 540         pp->dfl_prdctl = tmp;
 541
 542         /* Alloc resources */
 543         rc = ata_port_start(ap);
 544         if (rc) {
 545                 kfree(pp);
 546                 return rc;
 547         }
 548
 549         init_port(ap);
 550
 551         return 0;
 552 }
 553
 554 static struct ata_port_operations inic_port_ops = {
 555         .tf_load                = ata_tf_load,
 556         .tf_read                = ata_tf_read,
 557         .check_status           = ata_check_status,
 558         .exec_command           = ata_exec_command,
 559         .dev_select             = ata_std_dev_select,
 560
 561         .scr_read               = inic_scr_read,
 562         .scr_write              = inic_scr_write,
 563
 564         .bmdma_setup            = inic_bmdma_setup,
 565         .bmdma_start            = inic_bmdma_start,
 566         .bmdma_stop             = inic_bmdma_stop,
 567         .bmdma_status           = inic_bmdma_status,
 568
 569         .irq_clear              = inic_irq_clear,
 570         .irq_on                 = ata_irq_on,
 571
 572         .qc_prep                = ata_qc_prep,
 573         .qc_issue               = inic_qc_issue,
 574         .data_xfer              = ata_data_xfer,
 575
 576         .freeze                 = inic_freeze,
 577         .thaw                   = inic_thaw,
 578         .error_handler          = inic_error_handler,
 579         .post_internal_cmd      = inic_post_internal_cmd,
 580         .dev_config             = inic_dev_config,
 581
 582         .port_resume            = inic_port_resume,
 583
 584         .port_start             = inic_port_start,
 585 };
 586
 587 static struct ata_port_info inic_port_info = {
 588         /* For some reason, ATA_PROT_ATAPI is broken on this
 589          * controller, and no, PIO_POLLING does't fix it.  It somehow
 590          * manages to report the wrong ireason and ignoring ireason
 591          * results in machine lock up.  Tell libata to always prefer
 592          * DMA.
 593          */
 594         .flags                  = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA,
 595         .pio_mask               = 0x1f, /* pio0-4 */
 596         .mwdma_mask             = 0x07, /* mwdma0-2 */
 597         .udma_mask              = ATA_UDMA6,
 598         .port_ops               = &inic_port_ops
 599 };
 600
 601 static int init_controller(void __iomem *mmio_base, u16 hctl)
 602 {
 603         int i;
 604         u16 val;
 605
 606         hctl &= ~HCTL_KNOWN_BITS;
 607
 608         /* Soft reset whole controller.  Spec says reset duration is 3
 609          * PCI clocks, be generous and give it 10ms.
 610          */
 611         writew(hctl | HCTL_SOFTRST, mmio_base + HOST_CTL);
 612         readw(mmio_base + HOST_CTL); /* flush */
 613
 614         for (i = 0; i < 10; i++) {
 615                 msleep(1);
 616                 val = readw(mmio_base + HOST_CTL);
 617                 if (!(val & HCTL_SOFTRST))
 618                         break;
 619         }
 620
 621         if (val & HCTL_SOFTRST)
 622                 return -EIO;
 623
 624         /* mask all interrupts and reset ports */
 625         for (i = 0; i < NR_PORTS; i++) {
 626                 void __iomem *port_base = mmio_base + i * PORT_SIZE;
 627
 628                 writeb(0xff, port_base + PORT_IRQ_MASK);
 629                 inic_reset_port(port_base);
 630         }
 631
 632         /* port IRQ is masked now, unmask global IRQ */
 633         writew(hctl & ~HCTL_IRQOFF, mmio_base + HOST_CTL);
 634         val = readw(mmio_base + HOST_IRQ_MASK);
 635         val &= ~(HIRQ_PORT0 | HIRQ_PORT1);
 636         writew(val, mmio_base + HOST_IRQ_MASK);
 637
 638         return 0;
 639 }
 640
 641 #ifdef CONFIG_PM
 642 static int inic_pci_device_resume(struct pci_dev *pdev)
 643 {
 644         struct ata_host *host = dev_get_drvdata(&pdev->dev);
 645         struct inic_host_priv *hpriv = host->private_data;
 646         void __iomem *mmio_base = host->iomap[MMIO_BAR];
 647         int rc;
 648
 649         rc = ata_pci_device_do_resume(pdev);
 650         if (rc)
 651                 return rc;
 652
 653         if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
 654                 rc = init_controller(mmio_base, hpriv->cached_hctl);
 655                 if (rc)
 656                         return rc;
 657         }
 658
 659         ata_host_resume(host);
 660
 661         return 0;
 662 }
 663 #endif
 664
 665 static int inic_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 666 {
 667         static int printed_version;
 668         const struct ata_port_info *ppi[] = { &inic_port_info, NULL };
 669         struct ata_host *host;
 670         struct inic_host_priv *hpriv;
 671         void __iomem * const *iomap;
 672         int i, rc;
 673
 674         if (!printed_version++)
 675                 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
 676
 677         /* alloc host */
 678         host = ata_host_alloc_pinfo(&pdev->dev, ppi, NR_PORTS);
 679         hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
 680         if (!host || !hpriv)
 681                 return -ENOMEM;
 682
 683         host->private_data = hpriv;
 684
 685         /* acquire resources and fill host */
 686         rc = pcim_enable_device(pdev);
 687         if (rc)
 688                 return rc;
 689
 690         rc = pcim_iomap_regions(pdev, 0x3f, DRV_NAME);
 691         if (rc)
 692                 return rc;
 693         host->iomap = iomap = pcim_iomap_table(pdev);
 694
 695         for (i = 0; i < NR_PORTS; i++) {
 696                 struct ata_ioports *port = &host->ports[i]->ioaddr;
 697                 void __iomem *port_base = iomap[MMIO_BAR] + i * PORT_SIZE;
 698
 699                 port->cmd_addr = iomap[2 * i];
 700                 port->altstatus_addr =
 701                 port->ctl_addr = (void __iomem *)
 702                         ((unsigned long)iomap[2 * i + 1] | ATA_PCI_CTL_OFS);
 703                 port->scr_addr = port_base + PORT_SCR;
 704
 705                 ata_std_ports(port);
 706         }
 707
 708         hpriv->cached_hctl = readw(iomap[MMIO_BAR] + HOST_CTL);
 709
 710         /* Set dma_mask.  This devices doesn't support 64bit addressing. */
 711         rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
 712         if (rc) {
 713                 dev_printk(KERN_ERR, &pdev->dev,
 714                            "32-bit DMA enable failed\n");
 715                 return rc;
 716         }
 717
 718         rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
 719         if (rc) {
 720                 dev_printk(KERN_ERR, &pdev->dev,
 721                            "32-bit consistent DMA enable failed\n");
 722                 return rc;
 723         }
 724
 725         rc = init_controller(iomap[MMIO_BAR], hpriv->cached_hctl);
 726         if (rc) {
 727                 dev_printk(KERN_ERR, &pdev->dev,
 728                            "failed to initialize controller\n");
 729                 return rc;
 730         }
 731
 732         pci_set_master(pdev);
 733         return ata_host_activate(host, pdev->irq, inic_interrupt, IRQF_SHARED,
 734                                  &inic_sht);
 735 }
 736
 737 static const struct pci_device_id inic_pci_tbl[] = {
 738         { PCI_VDEVICE(INIT, 0x1622), },
 739         { },
 740 };
 741
 742 static struct pci_driver inic_pci_driver = {
 743         .name           = DRV_NAME,
 744         .id_table       = inic_pci_tbl,
 745 #ifdef CONFIG_PM
 746         .suspend        = ata_pci_device_suspend,
 747         .resume         = inic_pci_device_resume,
 748 #endif
 749         .probe          = inic_init_one,
 750         .remove         = ata_pci_remove_one,
 751 };
 752
 753 static int __init inic_init(void)
 754 {
 755         return pci_register_driver(&inic_pci_driver);
 756 }
 757
 758 static void __exit inic_exit(void)
 759 {
 760         pci_unregister_driver(&inic_pci_driver);
 761 }
 762
 763 MODULE_AUTHOR("Tejun Heo");
 764 MODULE_DESCRIPTION("low-level driver for Initio 162x SATA");
 765 MODULE_LICENSE("GPL v2");
 766 MODULE_DEVICE_TABLE(pci, inic_pci_tbl);
 767 MODULE_VERSION(DRV_VERSION);
 768
 769 module_init(inic_init);
 770 module_exit(inic_exit);