drivers/ata/sata_sil.c

   1 /*
   2  *  sata_sil.c - Silicon Image SATA
   3  *
   4  *  Maintained by:  Jeff Garzik <jgarzik@pobox.com>
   5  *                  Please ALWAYS copy linux-ide@vger.kernel.org
   6  *                  on emails.
   7  *
   8  *  Copyright 2003-2005 Red Hat, Inc.
   9  *  Copyright 2003 Benjamin Herrenschmidt
  10  *
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2, or (at your option)
  15  *  any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; see the file COPYING.  If not, write to
  24  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  25  *
  26  *
  27  *  libata documentation is available via 'make {ps|pdf}docs',
  28  *  as Documentation/DocBook/libata.*
  29  *
  30  *  Documentation for SiI 3112:
  31  *  http://gkernel.sourceforge.net/specs/sii/3112A_SiI-DS-0095-B2.pdf.bz2
  32  *
  33  *  Other errata and documentation available under NDA.
  34  *
  35  */
  36
  37 #include <linux/kernel.h>
  38 #include <linux/module.h>
  39 #include <linux/pci.h>
  40 #include <linux/init.h>
  41 #include <linux/blkdev.h>
  42 #include <linux/delay.h>
  43 #include <linux/interrupt.h>
  44 #include <linux/device.h>
  45 #include <scsi/scsi_host.h>
  46 #include <linux/libata.h>
  47
  48 #define DRV_NAME        "sata_sil"
  49 #define DRV_VERSION     "2.0"
  50
  51 enum {
  52         /*
  53          * host flags
  54          */
  55         SIL_FLAG_NO_SATA_IRQ    = (1 << 28),
  56         SIL_FLAG_RERR_ON_DMA_ACT = (1 << 29),
  57         SIL_FLAG_MOD15WRITE     = (1 << 30),
  58
  59         SIL_DFL_PORT_FLAGS      = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
  60                                   ATA_FLAG_MMIO | ATA_FLAG_HRST_TO_RESUME,
  61
  62         /*
  63          * Controller IDs
  64          */
  65         sil_3112                = 0,
  66         sil_3112_no_sata_irq    = 1,
  67         sil_3512                = 2,
  68         sil_3114                = 3,
  69
  70         /*
  71          * Register offsets
  72          */
  73         SIL_SYSCFG              = 0x48,
  74
  75         /*
  76          * Register bits
  77          */
  78         /* SYSCFG */
  79         SIL_MASK_IDE0_INT       = (1 << 22),
  80         SIL_MASK_IDE1_INT       = (1 << 23),
  81         SIL_MASK_IDE2_INT       = (1 << 24),
  82         SIL_MASK_IDE3_INT       = (1 << 25),
  83         SIL_MASK_2PORT          = SIL_MASK_IDE0_INT | SIL_MASK_IDE1_INT,
  84         SIL_MASK_4PORT          = SIL_MASK_2PORT |
  85                                   SIL_MASK_IDE2_INT | SIL_MASK_IDE3_INT,
  86
  87         /* BMDMA/BMDMA2 */
  88         SIL_INTR_STEERING       = (1 << 1),
  89
  90         SIL_DMA_ENABLE          = (1 << 0),  /* DMA run switch */
  91         SIL_DMA_RDWR            = (1 << 3),  /* DMA Rd-Wr */
  92         SIL_DMA_SATA_IRQ        = (1 << 4),  /* OR of all SATA IRQs */
  93         SIL_DMA_ACTIVE          = (1 << 16), /* DMA running */
  94         SIL_DMA_ERROR           = (1 << 17), /* PCI bus error */
  95         SIL_DMA_COMPLETE        = (1 << 18), /* cmd complete / IRQ pending */
  96         SIL_DMA_N_SATA_IRQ      = (1 << 6),  /* SATA_IRQ for the next channel */
  97         SIL_DMA_N_ACTIVE        = (1 << 24), /* ACTIVE for the next channel */
  98         SIL_DMA_N_ERROR         = (1 << 25), /* ERROR for the next channel */
  99         SIL_DMA_N_COMPLETE      = (1 << 26), /* COMPLETE for the next channel */
 100
 101         /* SIEN */
 102         SIL_SIEN_N              = (1 << 16), /* triggered by SError.N */
 103
 104         /*
 105          * Others
 106          */
 107         SIL_QUIRK_MOD15WRITE    = (1 << 0),
 108         SIL_QUIRK_UDMA5MAX      = (1 << 1),
 109 };
 110
 111 static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
 112 #ifdef CONFIG_PM
 113 static int sil_pci_device_resume(struct pci_dev *pdev);
 114 #endif
 115 static void sil_dev_config(struct ata_port *ap, struct ata_device *dev);
 116 static u32 sil_scr_read (struct ata_port *ap, unsigned int sc_reg);
 117 static void sil_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
 118 static void sil_post_set_mode (struct ata_port *ap);
 119 static irqreturn_t sil_interrupt(int irq, void *dev_instance);
 120 static void sil_freeze(struct ata_port *ap);
 121 static void sil_thaw(struct ata_port *ap);
 122
 123
 124 static const struct pci_device_id sil_pci_tbl[] = {
 125         { PCI_VDEVICE(CMD, 0x3112), sil_3112 },
 126         { PCI_VDEVICE(CMD, 0x0240), sil_3112 },
 127         { PCI_VDEVICE(CMD, 0x3512), sil_3512 },
 128         { PCI_VDEVICE(CMD, 0x3114), sil_3114 },
 129         { PCI_VDEVICE(ATI, 0x436e), sil_3112 },
 130         { PCI_VDEVICE(ATI, 0x4379), sil_3112_no_sata_irq },
 131         { PCI_VDEVICE(ATI, 0x437a), sil_3112_no_sata_irq },
 132
 133         { }     /* terminate list */
 134 };
 135
 136
 137 /* TODO firmware versions should be added - eric */
 138 static const struct sil_drivelist {
 139         const char * product;
 140         unsigned int quirk;
 141 } sil_blacklist [] = {
 142         { "ST320012AS",         SIL_QUIRK_MOD15WRITE },
 143         { "ST330013AS",         SIL_QUIRK_MOD15WRITE },
 144         { "ST340017AS",         SIL_QUIRK_MOD15WRITE },
 145         { "ST360015AS",         SIL_QUIRK_MOD15WRITE },
 146         { "ST380023AS",         SIL_QUIRK_MOD15WRITE },
 147         { "ST3120023AS",        SIL_QUIRK_MOD15WRITE },
 148         { "ST340014ASL",        SIL_QUIRK_MOD15WRITE },
 149         { "ST360014ASL",        SIL_QUIRK_MOD15WRITE },
 150         { "ST380011ASL",        SIL_QUIRK_MOD15WRITE },
 151         { "ST3120022ASL",       SIL_QUIRK_MOD15WRITE },
 152         { "ST3160021ASL",       SIL_QUIRK_MOD15WRITE },
 153         { "Maxtor 4D060H3",     SIL_QUIRK_UDMA5MAX },
 154         { }
 155 };
 156
 157 static struct pci_driver sil_pci_driver = {
 158         .name                   = DRV_NAME,
 159         .id_table               = sil_pci_tbl,
 160         .probe                  = sil_init_one,
 161         .remove                 = ata_pci_remove_one,
 162 #ifdef CONFIG_PM
 163         .suspend                = ata_pci_device_suspend,
 164         .resume                 = sil_pci_device_resume,
 165 #endif
 166 };
 167
 168 static struct scsi_host_template sil_sht = {
 169         .module                 = THIS_MODULE,
 170         .name                   = DRV_NAME,
 171         .ioctl                  = ata_scsi_ioctl,
 172         .queuecommand           = ata_scsi_queuecmd,
 173         .can_queue              = ATA_DEF_QUEUE,
 174         .this_id                = ATA_SHT_THIS_ID,
 175         .sg_tablesize           = LIBATA_MAX_PRD,
 176         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 177         .emulated               = ATA_SHT_EMULATED,
 178         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 179         .proc_name              = DRV_NAME,
 180         .dma_boundary           = ATA_DMA_BOUNDARY,
 181         .slave_configure        = ata_scsi_slave_config,
 182         .slave_destroy          = ata_scsi_slave_destroy,
 183         .bios_param             = ata_std_bios_param,
 184         .suspend                = ata_scsi_device_suspend,
 185         .resume                 = ata_scsi_device_resume,
 186 };
 187
 188 static const struct ata_port_operations sil_ops = {
 189         .port_disable           = ata_port_disable,
 190         .dev_config             = sil_dev_config,
 191         .tf_load                = ata_tf_load,
 192         .tf_read                = ata_tf_read,
 193         .check_status           = ata_check_status,
 194         .exec_command           = ata_exec_command,
 195         .dev_select             = ata_std_dev_select,
 196         .post_set_mode          = sil_post_set_mode,
 197         .bmdma_setup            = ata_bmdma_setup,
 198         .bmdma_start            = ata_bmdma_start,
 199         .bmdma_stop             = ata_bmdma_stop,
 200         .bmdma_status           = ata_bmdma_status,
 201         .qc_prep                = ata_qc_prep,
 202         .qc_issue               = ata_qc_issue_prot,
 203         .data_xfer              = ata_mmio_data_xfer,
 204         .freeze                 = sil_freeze,
 205         .thaw                   = sil_thaw,
 206         .error_handler          = ata_bmdma_error_handler,
 207         .post_internal_cmd      = ata_bmdma_post_internal_cmd,
 208         .irq_handler            = sil_interrupt,
 209         .irq_clear              = ata_bmdma_irq_clear,
 210         .scr_read               = sil_scr_read,
 211         .scr_write              = sil_scr_write,
 212         .port_start             = ata_port_start,
 213         .port_stop              = ata_port_stop,
 214         .host_stop              = ata_pci_host_stop,
 215 };
 216
 217 static const struct ata_port_info sil_port_info[] = {
 218         /* sil_3112 */
 219         {
 220                 .sht            = &sil_sht,
 221                 .flags          = SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE,
 222                 .pio_mask       = 0x1f,                 /* pio0-4 */
 223                 .mwdma_mask     = 0x07,                 /* mwdma0-2 */
 224                 .udma_mask      = 0x3f,                 /* udma0-5 */
 225                 .port_ops       = &sil_ops,
 226         },
 227         /* sil_3112_no_sata_irq */
 228         {
 229                 .sht            = &sil_sht,
 230                 .flags          = SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE |
 231                                   SIL_FLAG_NO_SATA_IRQ,
 232                 .pio_mask       = 0x1f,                 /* pio0-4 */
 233                 .mwdma_mask     = 0x07,                 /* mwdma0-2 */
 234                 .udma_mask      = 0x3f,                 /* udma0-5 */
 235                 .port_ops       = &sil_ops,
 236         },
 237         /* sil_3512 */
 238         {
 239                 .sht            = &sil_sht,
 240                 .flags          = SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
 241                 .pio_mask       = 0x1f,                 /* pio0-4 */
 242                 .mwdma_mask     = 0x07,                 /* mwdma0-2 */
 243                 .udma_mask      = 0x3f,                 /* udma0-5 */
 244                 .port_ops       = &sil_ops,
 245         },
 246         /* sil_3114 */
 247         {
 248                 .sht            = &sil_sht,
 249                 .flags          = SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
 250                 .pio_mask       = 0x1f,                 /* pio0-4 */
 251                 .mwdma_mask     = 0x07,                 /* mwdma0-2 */
 252                 .udma_mask      = 0x3f,                 /* udma0-5 */
 253                 .port_ops       = &sil_ops,
 254         },
 255 };
 256
 257 /* per-port register offsets */
 258 /* TODO: we can probably calculate rather than use a table */
 259 static const struct {
 260         unsigned long tf;       /* ATA taskfile register block */
 261         unsigned long ctl;      /* ATA control/altstatus register block */
 262         unsigned long bmdma;    /* DMA register block */
 263         unsigned long bmdma2;   /* DMA register block #2 */
 264         unsigned long fifo_cfg; /* FIFO Valid Byte Count and Control */
 265         unsigned long scr;      /* SATA control register block */
 266         unsigned long sien;     /* SATA Interrupt Enable register */
 267         unsigned long xfer_mode;/* data transfer mode register */
 268         unsigned long sfis_cfg; /* SATA FIS reception config register */
 269 } sil_port[] = {
 270         /* port 0 ... */
 271         { 0x80, 0x8A, 0x00, 0x10, 0x40, 0x100, 0x148, 0xb4, 0x14c },
 272         { 0xC0, 0xCA, 0x08, 0x18, 0x44, 0x180, 0x1c8, 0xf4, 0x1cc },
 273         { 0x280, 0x28A, 0x200, 0x210, 0x240, 0x300, 0x348, 0x2b4, 0x34c },
 274         { 0x2C0, 0x2CA, 0x208, 0x218, 0x244, 0x380, 0x3c8, 0x2f4, 0x3cc },
 275         /* ... port 3 */
 276 };
 277
 278 MODULE_AUTHOR("Jeff Garzik");
 279 MODULE_DESCRIPTION("low-level driver for Silicon Image SATA controller");
 280 MODULE_LICENSE("GPL");
 281 MODULE_DEVICE_TABLE(pci, sil_pci_tbl);
 282 MODULE_VERSION(DRV_VERSION);
 283
 284 static int slow_down = 0;
 285 module_param(slow_down, int, 0444);
 286 MODULE_PARM_DESC(slow_down, "Sledgehammer used to work around random problems, by limiting commands to 15 sectors (0=off, 1=on)");
 287
 288
 289 static unsigned char sil_get_device_cache_line(struct pci_dev *pdev)
 290 {
 291         u8 cache_line = 0;
 292         pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line);
 293         return cache_line;
 294 }
 295
 296 static void sil_post_set_mode (struct ata_port *ap)
 297 {
 298         struct ata_host *host = ap->host;
 299         struct ata_device *dev;
 300         void __iomem *addr = host->mmio_base + sil_port[ap->port_no].xfer_mode;
 301         u32 tmp, dev_mode[2];
 302         unsigned int i;
 303
 304         for (i = 0; i < 2; i++) {
 305                 dev = &ap->device[i];
 306                 if (!ata_dev_enabled(dev))
 307                         dev_mode[i] = 0;        /* PIO0/1/2 */
 308                 else if (dev->flags & ATA_DFLAG_PIO)
 309                         dev_mode[i] = 1;        /* PIO3/4 */
 310                 else
 311                         dev_mode[i] = 3;        /* UDMA */
 312                 /* value 2 indicates MDMA */
 313         }
 314
 315         tmp = readl(addr);
 316         tmp &= ~((1<<5) | (1<<4) | (1<<1) | (1<<0));
 317         tmp |= dev_mode[0];
 318         tmp |= (dev_mode[1] << 4);
 319         writel(tmp, addr);
 320         readl(addr);    /* flush */
 321 }
 322
 323 static inline unsigned long sil_scr_addr(struct ata_port *ap, unsigned int sc_reg)
 324 {
 325         unsigned long offset = ap->ioaddr.scr_addr;
 326
 327         switch (sc_reg) {
 328         case SCR_STATUS:
 329                 return offset + 4;
 330         case SCR_ERROR:
 331                 return offset + 8;
 332         case SCR_CONTROL:
 333                 return offset;
 334         default:
 335                 /* do nothing */
 336                 break;
 337         }
 338
 339         return 0;
 340 }
 341
 342 static u32 sil_scr_read (struct ata_port *ap, unsigned int sc_reg)
 343 {
 344         void __iomem *mmio = (void __iomem *) sil_scr_addr(ap, sc_reg);
 345         if (mmio)
 346                 return readl(mmio);
 347         return 0xffffffffU;
 348 }
 349
 350 static void sil_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
 351 {
 352         void __iomem *mmio = (void __iomem *) sil_scr_addr(ap, sc_reg);
 353         if (mmio)
 354                 writel(val, mmio);
 355 }
 356
 357 static void sil_host_intr(struct ata_port *ap, u32 bmdma2)
 358 {
 359         struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
 360         u8 status;
 361
 362         if (unlikely(bmdma2 & SIL_DMA_SATA_IRQ)) {
 363                 u32 serror;
 364
 365                 /* SIEN doesn't mask SATA IRQs on some 3112s.  Those
 366                  * controllers continue to assert IRQ as long as
 367                  * SError bits are pending.  Clear SError immediately.
 368                  */
 369                 serror = sil_scr_read(ap, SCR_ERROR);
 370                 sil_scr_write(ap, SCR_ERROR, serror);
 371
 372                 /* Trigger hotplug and accumulate SError only if the
 373                  * port isn't already frozen.  Otherwise, PHY events
 374                  * during hardreset makes controllers with broken SIEN
 375                  * repeat probing needlessly.
 376                  */
 377                 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
 378                         ata_ehi_hotplugged(&ap->eh_info);
 379                         ap->eh_info.serror |= serror;
 380                 }
 381
 382                 goto freeze;
 383         }
 384
 385         if (unlikely(!qc || qc->tf.ctl & ATA_NIEN))
 386                 goto freeze;
 387
 388         /* Check whether we are expecting interrupt in this state */
 389         switch (ap->hsm_task_state) {
 390         case HSM_ST_FIRST:
 391                 /* Some pre-ATAPI-4 devices assert INTRQ
 392                  * at this state when ready to receive CDB.
 393                  */
 394
 395                 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
 396                  * The flag was turned on only for atapi devices.
 397                  * No need to check is_atapi_taskfile(&qc->tf) again.
 398                  */
 399                 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
 400                         goto err_hsm;
 401                 break;
 402         case HSM_ST_LAST:
 403                 if (qc->tf.protocol == ATA_PROT_DMA ||
 404                     qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
 405                         /* clear DMA-Start bit */
 406                         ap->ops->bmdma_stop(qc);
 407
 408                         if (bmdma2 & SIL_DMA_ERROR) {
 409                                 qc->err_mask |= AC_ERR_HOST_BUS;
 410                                 ap->hsm_task_state = HSM_ST_ERR;
 411                         }
 412                 }
 413                 break;
 414         case HSM_ST:
 415                 break;
 416         default:
 417                 goto err_hsm;
 418         }
 419
 420         /* check main status, clearing INTRQ */
 421         status = ata_chk_status(ap);
 422         if (unlikely(status & ATA_BUSY))
 423                 goto err_hsm;
 424
 425         /* ack bmdma irq events */
 426         ata_bmdma_irq_clear(ap);
 427
 428         /* kick HSM in the ass */
 429         ata_hsm_move(ap, qc, status, 0);
 430
 431         return;
 432
 433  err_hsm:
 434         qc->err_mask |= AC_ERR_HSM;
 435  freeze:
 436         ata_port_freeze(ap);
 437 }
 438
 439 static irqreturn_t sil_interrupt(int irq, void *dev_instance)
 440 {
 441         struct ata_host *host = dev_instance;
 442         void __iomem *mmio_base = host->mmio_base;
 443         int handled = 0;
 444         int i;
 445
 446         spin_lock(&host->lock);
 447
 448         for (i = 0; i < host->n_ports; i++) {
 449                 struct ata_port *ap = host->ports[i];
 450                 u32 bmdma2 = readl(mmio_base + sil_port[ap->port_no].bmdma2);
 451
 452                 if (unlikely(!ap || ap->flags & ATA_FLAG_DISABLED))
 453                         continue;
 454
 455                 /* turn off SATA_IRQ if not supported */
 456                 if (ap->flags & SIL_FLAG_NO_SATA_IRQ)
 457                         bmdma2 &= ~SIL_DMA_SATA_IRQ;
 458
 459                 if (bmdma2 == 0xffffffff ||
 460                     !(bmdma2 & (SIL_DMA_COMPLETE | SIL_DMA_SATA_IRQ)))
 461                         continue;
 462
 463                 sil_host_intr(ap, bmdma2);
 464                 handled = 1;
 465         }
 466
 467         spin_unlock(&host->lock);
 468
 469         return IRQ_RETVAL(handled);
 470 }
 471
 472 static void sil_freeze(struct ata_port *ap)
 473 {
 474         void __iomem *mmio_base = ap->host->mmio_base;
 475         u32 tmp;
 476
 477         /* global IRQ mask doesn't block SATA IRQ, turn off explicitly */
 478         writel(0, mmio_base + sil_port[ap->port_no].sien);
 479
 480         /* plug IRQ */
 481         tmp = readl(mmio_base + SIL_SYSCFG);
 482         tmp |= SIL_MASK_IDE0_INT << ap->port_no;
 483         writel(tmp, mmio_base + SIL_SYSCFG);
 484         readl(mmio_base + SIL_SYSCFG);  /* flush */
 485 }
 486
 487 static void sil_thaw(struct ata_port *ap)
 488 {
 489         void __iomem *mmio_base = ap->host->mmio_base;
 490         u32 tmp;
 491
 492         /* clear IRQ */
 493         ata_chk_status(ap);
 494         ata_bmdma_irq_clear(ap);
 495
 496         /* turn on SATA IRQ if supported */
 497         if (!(ap->flags & SIL_FLAG_NO_SATA_IRQ))
 498                 writel(SIL_SIEN_N, mmio_base + sil_port[ap->port_no].sien);
 499
 500         /* turn on IRQ */
 501         tmp = readl(mmio_base + SIL_SYSCFG);
 502         tmp &= ~(SIL_MASK_IDE0_INT << ap->port_no);
 503         writel(tmp, mmio_base + SIL_SYSCFG);
 504 }
 505
 506 /**
 507  *      sil_dev_config - Apply device/host-specific errata fixups
 508  *      @ap: Port containing device to be examined
 509  *      @dev: Device to be examined
 510  *
 511  *      After the IDENTIFY [PACKET] DEVICE step is complete, and a
 512  *      device is known to be present, this function is called.
 513  *      We apply two errata fixups which are specific to Silicon Image,
 514  *      a Seagate and a Maxtor fixup.
 515  *
 516  *      For certain Seagate devices, we must limit the maximum sectors
 517  *      to under 8K.
 518  *
 519  *      For certain Maxtor devices, we must not program the drive
 520  *      beyond udma5.
 521  *
 522  *      Both fixups are unfairly pessimistic.  As soon as I get more
 523  *      information on these errata, I will create a more exhaustive
 524  *      list, and apply the fixups to only the specific
 525  *      devices/hosts/firmwares that need it.
 526  *
 527  *      20040111 - Seagate drives affected by the Mod15Write bug are blacklisted
 528  *      The Maxtor quirk is in the blacklist, but I'm keeping the original
 529  *      pessimistic fix for the following reasons...
 530  *      - There seems to be less info on it, only one device gleaned off the
 531  *      Windows driver, maybe only one is affected.  More info would be greatly
 532  *      appreciated.
 533  *      - But then again UDMA5 is hardly anything to complain about
 534  */
 535 static void sil_dev_config(struct ata_port *ap, struct ata_device *dev)
 536 {
 537         unsigned int n, quirks = 0;
 538         unsigned char model_num[41];
 539
 540         ata_id_c_string(dev->id, model_num, ATA_ID_PROD_OFS, sizeof(model_num));
 541
 542         for (n = 0; sil_blacklist[n].product; n++)
 543                 if (!strcmp(sil_blacklist[n].product, model_num)) {
 544                         quirks = sil_blacklist[n].quirk;
 545                         break;
 546                 }
 547
 548         /* limit requests to 15 sectors */
 549         if (slow_down ||
 550             ((ap->flags & SIL_FLAG_MOD15WRITE) &&
 551              (quirks & SIL_QUIRK_MOD15WRITE))) {
 552                 ata_dev_printk(dev, KERN_INFO, "applying Seagate errata fix "
 553                                "(mod15write workaround)\n");
 554                 dev->max_sectors = 15;
 555                 return;
 556         }
 557
 558         /* limit to udma5 */
 559         if (quirks & SIL_QUIRK_UDMA5MAX) {
 560                 ata_dev_printk(dev, KERN_INFO,
 561                                "applying Maxtor errata fix %s\n", model_num);
 562                 dev->udma_mask &= ATA_UDMA5;
 563                 return;
 564         }
 565 }
 566
 567 static void sil_init_controller(struct pci_dev *pdev,
 568                                 int n_ports, unsigned long port_flags,
 569                                 void __iomem *mmio_base)
 570 {
 571         u8 cls;
 572         u32 tmp;
 573         int i;
 574
 575         /* Initialize FIFO PCI bus arbitration */
 576         cls = sil_get_device_cache_line(pdev);
 577         if (cls) {
 578                 cls >>= 3;
 579                 cls++;  /* cls = (line_size/8)+1 */
 580                 for (i = 0; i < n_ports; i++)
 581                         writew(cls << 8 | cls,
 582                                mmio_base + sil_port[i].fifo_cfg);
 583         } else
 584                 dev_printk(KERN_WARNING, &pdev->dev,
 585                            "cache line size not set.  Driver may not function\n");
 586
 587         /* Apply R_ERR on DMA activate FIS errata workaround */
 588         if (port_flags & SIL_FLAG_RERR_ON_DMA_ACT) {
 589                 int cnt;
 590
 591                 for (i = 0, cnt = 0; i < n_ports; i++) {
 592                         tmp = readl(mmio_base + sil_port[i].sfis_cfg);
 593                         if ((tmp & 0x3) != 0x01)
 594                                 continue;
 595                         if (!cnt)
 596                                 dev_printk(KERN_INFO, &pdev->dev,
 597                                            "Applying R_ERR on DMA activate "
 598                                            "FIS errata fix\n");
 599                         writel(tmp & ~0x3, mmio_base + sil_port[i].sfis_cfg);
 600                         cnt++;
 601                 }
 602         }
 603
 604         if (n_ports == 4) {
 605                 /* flip the magic "make 4 ports work" bit */
 606                 tmp = readl(mmio_base + sil_port[2].bmdma);
 607                 if ((tmp & SIL_INTR_STEERING) == 0)
 608                         writel(tmp | SIL_INTR_STEERING,
 609                                mmio_base + sil_port[2].bmdma);
 610         }
 611 }
 612
 613 static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 614 {
 615         static int printed_version;
 616         struct ata_probe_ent *probe_ent = NULL;
 617         unsigned long base;
 618         void __iomem *mmio_base;
 619         int rc;
 620         unsigned int i;
 621         int pci_dev_busy = 0;
 622
 623         if (!printed_version++)
 624                 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
 625
 626         rc = pci_enable_device(pdev);
 627         if (rc)
 628                 return rc;
 629
 630         rc = pci_request_regions(pdev, DRV_NAME);
 631         if (rc) {
 632                 pci_dev_busy = 1;
 633                 goto err_out;
 634         }
 635
 636         rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
 637         if (rc)
 638                 goto err_out_regions;
 639         rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
 640         if (rc)
 641                 goto err_out_regions;
 642
 643         probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL);
 644         if (probe_ent == NULL) {
 645                 rc = -ENOMEM;
 646                 goto err_out_regions;
 647         }
 648
 649         INIT_LIST_HEAD(&probe_ent->node);
 650         probe_ent->dev = pci_dev_to_dev(pdev);
 651         probe_ent->port_ops = sil_port_info[ent->driver_data].port_ops;
 652         probe_ent->sht = sil_port_info[ent->driver_data].sht;
 653         probe_ent->n_ports = (ent->driver_data == sil_3114) ? 4 : 2;
 654         probe_ent->pio_mask = sil_port_info[ent->driver_data].pio_mask;
 655         probe_ent->mwdma_mask = sil_port_info[ent->driver_data].mwdma_mask;
 656         probe_ent->udma_mask = sil_port_info[ent->driver_data].udma_mask;
 657         probe_ent->irq = pdev->irq;
 658         probe_ent->irq_flags = IRQF_SHARED;
 659         probe_ent->port_flags = sil_port_info[ent->driver_data].flags;
 660
 661         mmio_base = pci_iomap(pdev, 5, 0);
 662         if (mmio_base == NULL) {
 663                 rc = -ENOMEM;
 664                 goto err_out_free_ent;
 665         }
 666
 667         probe_ent->mmio_base = mmio_base;
 668
 669         base = (unsigned long) mmio_base;
 670
 671         for (i = 0; i < probe_ent->n_ports; i++) {
 672                 probe_ent->port[i].cmd_addr = base + sil_port[i].tf;
 673                 probe_ent->port[i].altstatus_addr =
 674                 probe_ent->port[i].ctl_addr = base + sil_port[i].ctl;
 675                 probe_ent->port[i].bmdma_addr = base + sil_port[i].bmdma;
 676                 probe_ent->port[i].scr_addr = base + sil_port[i].scr;
 677                 ata_std_ports(&probe_ent->port[i]);
 678         }
 679
 680         sil_init_controller(pdev, probe_ent->n_ports, probe_ent->port_flags,
 681                             mmio_base);
 682
 683         pci_set_master(pdev);
 684
 685         /* FIXME: check ata_device_add return value */
 686         ata_device_add(probe_ent);
 687         kfree(probe_ent);
 688
 689         return 0;
 690
 691 err_out_free_ent:
 692         kfree(probe_ent);
 693 err_out_regions:
 694         pci_release_regions(pdev);
 695 err_out:
 696         if (!pci_dev_busy)
 697                 pci_disable_device(pdev);
 698         return rc;
 699 }
 700
 701 #ifdef CONFIG_PM
 702 static int sil_pci_device_resume(struct pci_dev *pdev)
 703 {
 704         struct ata_host *host = dev_get_drvdata(&pdev->dev);
 705
 706         ata_pci_device_do_resume(pdev);
 707         sil_init_controller(pdev, host->n_ports, host->ports[0]->flags,
 708                             host->mmio_base);
 709         ata_host_resume(host);
 710
 711         return 0;
 712 }
 713 #endif
 714
 715 static int __init sil_init(void)
 716 {
 717         return pci_register_driver(&sil_pci_driver);
 718 }
 719
 720 static void __exit sil_exit(void)
 721 {
 722         pci_unregister_driver(&sil_pci_driver);
 723 }
 724
 725
 726 module_init(sil_init);
 727 module_exit(sil_exit);