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 #include <linux/dmi.h>
  48
  49 #define DRV_NAME        "sata_sil"
  50 #define DRV_VERSION     "2.4"
  51
  52 #define SIL_DMA_BOUNDARY        0x7fffffffUL
  53
  54 enum {
  55         SIL_MMIO_BAR            = 5,
  56
  57         /*
  58          * host flags
  59          */
  60         SIL_FLAG_NO_SATA_IRQ    = (1 << 28),
  61         SIL_FLAG_RERR_ON_DMA_ACT = (1 << 29),
  62         SIL_FLAG_MOD15WRITE     = (1 << 30),
  63
  64         SIL_DFL_PORT_FLAGS      = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
  65                                   ATA_FLAG_MMIO,
  66
  67         /*
  68          * Controller IDs
  69          */
  70         sil_3112                = 0,
  71         sil_3112_no_sata_irq    = 1,
  72         sil_3512                = 2,
  73         sil_3114                = 3,
  74
  75         /*
  76          * Register offsets
  77          */
  78         SIL_SYSCFG              = 0x48,
  79
  80         /*
  81          * Register bits
  82          */
  83         /* SYSCFG */
  84         SIL_MASK_IDE0_INT       = (1 << 22),
  85         SIL_MASK_IDE1_INT       = (1 << 23),
  86         SIL_MASK_IDE2_INT       = (1 << 24),
  87         SIL_MASK_IDE3_INT       = (1 << 25),
  88         SIL_MASK_2PORT          = SIL_MASK_IDE0_INT | SIL_MASK_IDE1_INT,
  89         SIL_MASK_4PORT          = SIL_MASK_2PORT |
  90                                   SIL_MASK_IDE2_INT | SIL_MASK_IDE3_INT,
  91
  92         /* BMDMA/BMDMA2 */
  93         SIL_INTR_STEERING       = (1 << 1),
  94
  95         SIL_DMA_ENABLE          = (1 << 0),  /* DMA run switch */
  96         SIL_DMA_RDWR            = (1 << 3),  /* DMA Rd-Wr */
  97         SIL_DMA_SATA_IRQ        = (1 << 4),  /* OR of all SATA IRQs */
  98         SIL_DMA_ACTIVE          = (1 << 16), /* DMA running */
  99         SIL_DMA_ERROR           = (1 << 17), /* PCI bus error */
 100         SIL_DMA_COMPLETE        = (1 << 18), /* cmd complete / IRQ pending */
 101         SIL_DMA_N_SATA_IRQ      = (1 << 6),  /* SATA_IRQ for the next channel */
 102         SIL_DMA_N_ACTIVE        = (1 << 24), /* ACTIVE for the next channel */
 103         SIL_DMA_N_ERROR         = (1 << 25), /* ERROR for the next channel */
 104         SIL_DMA_N_COMPLETE      = (1 << 26), /* COMPLETE for the next channel */
 105
 106         /* SIEN */
 107         SIL_SIEN_N              = (1 << 16), /* triggered by SError.N */
 108
 109         /*
 110          * Others
 111          */
 112         SIL_QUIRK_MOD15WRITE    = (1 << 0),
 113         SIL_QUIRK_UDMA5MAX      = (1 << 1),
 114 };
 115
 116 static int sil_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
 117 #ifdef CONFIG_PM
 118 static int sil_pci_device_resume(struct pci_dev *pdev);
 119 #endif
 120 static void sil_dev_config(struct ata_device *dev);
 121 static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
 122 static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
 123 static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed);
 124 static void sil_qc_prep(struct ata_queued_cmd *qc);
 125 static void sil_bmdma_setup(struct ata_queued_cmd *qc);
 126 static void sil_bmdma_start(struct ata_queued_cmd *qc);
 127 static void sil_bmdma_stop(struct ata_queued_cmd *qc);
 128 static void sil_freeze(struct ata_port *ap);
 129 static void sil_thaw(struct ata_port *ap);
 130
 131
 132 static const struct pci_device_id sil_pci_tbl[] = {
 133         { PCI_VDEVICE(CMD, 0x3112), sil_3112 },
 134         { PCI_VDEVICE(CMD, 0x0240), sil_3112 },
 135         { PCI_VDEVICE(CMD, 0x3512), sil_3512 },
 136         { PCI_VDEVICE(CMD, 0x3114), sil_3114 },
 137         { PCI_VDEVICE(ATI, 0x436e), sil_3112 },
 138         { PCI_VDEVICE(ATI, 0x4379), sil_3112_no_sata_irq },
 139         { PCI_VDEVICE(ATI, 0x437a), sil_3112_no_sata_irq },
 140
 141         { }     /* terminate list */
 142 };
 143
 144
 145 /* TODO firmware versions should be added - eric */
 146 static const struct sil_drivelist {
 147         const char *product;
 148         unsigned int quirk;
 149 } sil_blacklist [] = {
 150         { "ST320012AS",         SIL_QUIRK_MOD15WRITE },
 151         { "ST330013AS",         SIL_QUIRK_MOD15WRITE },
 152         { "ST340017AS",         SIL_QUIRK_MOD15WRITE },
 153         { "ST360015AS",         SIL_QUIRK_MOD15WRITE },
 154         { "ST380023AS",         SIL_QUIRK_MOD15WRITE },
 155         { "ST3120023AS",        SIL_QUIRK_MOD15WRITE },
 156         { "ST340014ASL",        SIL_QUIRK_MOD15WRITE },
 157         { "ST360014ASL",        SIL_QUIRK_MOD15WRITE },
 158         { "ST380011ASL",        SIL_QUIRK_MOD15WRITE },
 159         { "ST3120022ASL",       SIL_QUIRK_MOD15WRITE },
 160         { "ST3160021ASL",       SIL_QUIRK_MOD15WRITE },
 161         { "Maxtor 4D060H3",     SIL_QUIRK_UDMA5MAX },
 162         { }
 163 };
 164
 165 static struct pci_driver sil_pci_driver = {
 166         .name                   = DRV_NAME,
 167         .id_table               = sil_pci_tbl,
 168         .probe                  = sil_init_one,
 169         .remove                 = ata_pci_remove_one,
 170 #ifdef CONFIG_PM
 171         .suspend                = ata_pci_device_suspend,
 172         .resume                 = sil_pci_device_resume,
 173 #endif
 174 };
 175
 176 static struct scsi_host_template sil_sht = {
 177         ATA_BASE_SHT(DRV_NAME),
 178         /** These controllers support Large Block Transfer which allows
 179             transfer chunks up to 2GB and which cross 64KB boundaries,
 180             therefore the DMA limits are more relaxed than standard ATA SFF. */
 181         .dma_boundary           = SIL_DMA_BOUNDARY,
 182         .sg_tablesize           = ATA_MAX_PRD
 183 };
 184
 185 static struct ata_port_operations sil_ops = {
 186         .inherits               = &ata_bmdma32_port_ops,
 187         .dev_config             = sil_dev_config,
 188         .set_mode               = sil_set_mode,
 189         .bmdma_setup            = sil_bmdma_setup,
 190         .bmdma_start            = sil_bmdma_start,
 191         .bmdma_stop             = sil_bmdma_stop,
 192         .qc_prep                = sil_qc_prep,
 193         .freeze                 = sil_freeze,
 194         .thaw                   = sil_thaw,
 195         .scr_read               = sil_scr_read,
 196         .scr_write              = sil_scr_write,
 197 };
 198
 199 static const struct ata_port_info sil_port_info[] = {
 200         /* sil_3112 */
 201         {
 202                 .flags          = SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE,
 203                 .pio_mask       = ATA_PIO4,
 204                 .mwdma_mask     = ATA_MWDMA2,
 205                 .udma_mask      = ATA_UDMA5,
 206                 .port_ops       = &sil_ops,
 207         },
 208         /* sil_3112_no_sata_irq */
 209         {
 210                 .flags          = SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE |
 211                                   SIL_FLAG_NO_SATA_IRQ,
 212                 .pio_mask       = ATA_PIO4,
 213                 .mwdma_mask     = ATA_MWDMA2,
 214                 .udma_mask      = ATA_UDMA5,
 215                 .port_ops       = &sil_ops,
 216         },
 217         /* sil_3512 */
 218         {
 219                 .flags          = SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
 220                 .pio_mask       = ATA_PIO4,
 221                 .mwdma_mask     = ATA_MWDMA2,
 222                 .udma_mask      = ATA_UDMA5,
 223                 .port_ops       = &sil_ops,
 224         },
 225         /* sil_3114 */
 226         {
 227                 .flags          = SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
 228                 .pio_mask       = ATA_PIO4,
 229                 .mwdma_mask     = ATA_MWDMA2,
 230                 .udma_mask      = ATA_UDMA5,
 231                 .port_ops       = &sil_ops,
 232         },
 233 };
 234
 235 /* per-port register offsets */
 236 /* TODO: we can probably calculate rather than use a table */
 237 static const struct {
 238         unsigned long tf;       /* ATA taskfile register block */
 239         unsigned long ctl;      /* ATA control/altstatus register block */
 240         unsigned long bmdma;    /* DMA register block */
 241         unsigned long bmdma2;   /* DMA register block #2 */
 242         unsigned long fifo_cfg; /* FIFO Valid Byte Count and Control */
 243         unsigned long scr;      /* SATA control register block */
 244         unsigned long sien;     /* SATA Interrupt Enable register */
 245         unsigned long xfer_mode;/* data transfer mode register */
 246         unsigned long sfis_cfg; /* SATA FIS reception config register */
 247 } sil_port[] = {
 248         /* port 0 ... */
 249         /*   tf    ctl  bmdma  bmdma2  fifo    scr   sien   mode   sfis */
 250         {  0x80,  0x8A,   0x0,  0x10,  0x40, 0x100, 0x148,  0xb4, 0x14c },
 251         {  0xC0,  0xCA,   0x8,  0x18,  0x44, 0x180, 0x1c8,  0xf4, 0x1cc },
 252         { 0x280, 0x28A, 0x200, 0x210, 0x240, 0x300, 0x348, 0x2b4, 0x34c },
 253         { 0x2C0, 0x2CA, 0x208, 0x218, 0x244, 0x380, 0x3c8, 0x2f4, 0x3cc },
 254         /* ... port 3 */
 255 };
 256
 257 MODULE_AUTHOR("Jeff Garzik");
 258 MODULE_DESCRIPTION("low-level driver for Silicon Image SATA controller");
 259 MODULE_LICENSE("GPL");
 260 MODULE_DEVICE_TABLE(pci, sil_pci_tbl);
 261 MODULE_VERSION(DRV_VERSION);
 262
 263 static int slow_down;
 264 module_param(slow_down, int, 0444);
 265 MODULE_PARM_DESC(slow_down, "Sledgehammer used to work around random problems, by limiting commands to 15 sectors (0=off, 1=on)");
 266
 267
 268 static void sil_bmdma_stop(struct ata_queued_cmd *qc)
 269 {
 270         struct ata_port *ap = qc->ap;
 271         void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
 272         void __iomem *bmdma2 = mmio_base + sil_port[ap->port_no].bmdma2;
 273
 274         /* clear start/stop bit - can safely always write 0 */
 275         iowrite8(0, bmdma2);
 276
 277         /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
 278         ata_sff_dma_pause(ap);
 279 }
 280
 281 static void sil_bmdma_setup(struct ata_queued_cmd *qc)
 282 {
 283         struct ata_port *ap = qc->ap;
 284         void __iomem *bmdma = ap->ioaddr.bmdma_addr;
 285
 286         /* load PRD table addr. */
 287         iowrite32(ap->bmdma_prd_dma, bmdma + ATA_DMA_TABLE_OFS);
 288
 289         /* issue r/w command */
 290         ap->ops->sff_exec_command(ap, &qc->tf);
 291 }
 292
 293 static void sil_bmdma_start(struct ata_queued_cmd *qc)
 294 {
 295         unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
 296         struct ata_port *ap = qc->ap;
 297         void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
 298         void __iomem *bmdma2 = mmio_base + sil_port[ap->port_no].bmdma2;
 299         u8 dmactl = ATA_DMA_START;
 300
 301         /* set transfer direction, start host DMA transaction
 302            Note: For Large Block Transfer to work, the DMA must be started
 303            using the bmdma2 register. */
 304         if (!rw)
 305                 dmactl |= ATA_DMA_WR;
 306         iowrite8(dmactl, bmdma2);
 307 }
 308
 309 /* The way God intended PCI IDE scatter/gather lists to look and behave... */
 310 static void sil_fill_sg(struct ata_queued_cmd *qc)
 311 {
 312         struct scatterlist *sg;
 313         struct ata_port *ap = qc->ap;
 314         struct ata_bmdma_prd *prd, *last_prd = NULL;
 315         unsigned int si;
 316
 317         prd = &ap->bmdma_prd[0];
 318         for_each_sg(qc->sg, sg, qc->n_elem, si) {
 319                 /* Note h/w doesn't support 64-bit, so we unconditionally
 320                  * truncate dma_addr_t to u32.
 321                  */
 322                 u32 addr = (u32) sg_dma_address(sg);
 323                 u32 sg_len = sg_dma_len(sg);
 324
 325                 prd->addr = cpu_to_le32(addr);
 326                 prd->flags_len = cpu_to_le32(sg_len);
 327                 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", si, addr, sg_len);
 328
 329                 last_prd = prd;
 330                 prd++;
 331         }
 332
 333         if (likely(last_prd))
 334                 last_prd->flags_len |= cpu_to_le32(ATA_PRD_EOT);
 335 }
 336
 337 static void sil_qc_prep(struct ata_queued_cmd *qc)
 338 {
 339         if (!(qc->flags & ATA_QCFLAG_DMAMAP))
 340                 return;
 341
 342         sil_fill_sg(qc);
 343 }
 344
 345 static unsigned char sil_get_device_cache_line(struct pci_dev *pdev)
 346 {
 347         u8 cache_line = 0;
 348         pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line);
 349         return cache_line;
 350 }
 351
 352 /**
 353  *      sil_set_mode            -       wrap set_mode functions
 354  *      @link: link to set up
 355  *      @r_failed: returned device when we fail
 356  *
 357  *      Wrap the libata method for device setup as after the setup we need
 358  *      to inspect the results and do some configuration work
 359  */
 360
 361 static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed)
 362 {
 363         struct ata_port *ap = link->ap;
 364         void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
 365         void __iomem *addr = mmio_base + sil_port[ap->port_no].xfer_mode;
 366         struct ata_device *dev;
 367         u32 tmp, dev_mode[2] = { };
 368         int rc;
 369
 370         rc = ata_do_set_mode(link, r_failed);
 371         if (rc)
 372                 return rc;
 373
 374         ata_for_each_dev(dev, link, ALL) {
 375                 if (!ata_dev_enabled(dev))
 376                         dev_mode[dev->devno] = 0;       /* PIO0/1/2 */
 377                 else if (dev->flags & ATA_DFLAG_PIO)
 378                         dev_mode[dev->devno] = 1;       /* PIO3/4 */
 379                 else
 380                         dev_mode[dev->devno] = 3;       /* UDMA */
 381                 /* value 2 indicates MDMA */
 382         }
 383
 384         tmp = readl(addr);
 385         tmp &= ~((1<<5) | (1<<4) | (1<<1) | (1<<0));
 386         tmp |= dev_mode[0];
 387         tmp |= (dev_mode[1] << 4);
 388         writel(tmp, addr);
 389         readl(addr);    /* flush */
 390         return 0;
 391 }
 392
 393 static inline void __iomem *sil_scr_addr(struct ata_port *ap,
 394                                          unsigned int sc_reg)
 395 {
 396         void __iomem *offset = ap->ioaddr.scr_addr;
 397
 398         switch (sc_reg) {
 399         case SCR_STATUS:
 400                 return offset + 4;
 401         case SCR_ERROR:
 402                 return offset + 8;
 403         case SCR_CONTROL:
 404                 return offset;
 405         default:
 406                 /* do nothing */
 407                 break;
 408         }
 409
 410         return NULL;
 411 }
 412
 413 static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
 414 {
 415         void __iomem *mmio = sil_scr_addr(link->ap, sc_reg);
 416
 417         if (mmio) {
 418                 *val = readl(mmio);
 419                 return 0;
 420         }
 421         return -EINVAL;
 422 }
 423
 424 static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
 425 {
 426         void __iomem *mmio = sil_scr_addr(link->ap, sc_reg);
 427
 428         if (mmio) {
 429                 writel(val, mmio);
 430                 return 0;
 431         }
 432         return -EINVAL;
 433 }
 434
 435 static void sil_host_intr(struct ata_port *ap, u32 bmdma2)
 436 {
 437         struct ata_eh_info *ehi = &ap->link.eh_info;
 438         struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
 439         u8 status;
 440
 441         if (unlikely(bmdma2 & SIL_DMA_SATA_IRQ)) {
 442                 u32 serror;
 443
 444                 /* SIEN doesn't mask SATA IRQs on some 3112s.  Those
 445                  * controllers continue to assert IRQ as long as
 446                  * SError bits are pending.  Clear SError immediately.
 447                  */
 448                 sil_scr_read(&ap->link, SCR_ERROR, &serror);
 449                 sil_scr_write(&ap->link, SCR_ERROR, serror);
 450
 451                 /* Sometimes spurious interrupts occur, double check
 452                  * it's PHYRDY CHG.
 453                  */
 454                 if (serror & SERR_PHYRDY_CHG) {
 455                         ap->link.eh_info.serror |= serror;
 456                         goto freeze;
 457                 }
 458
 459                 if (!(bmdma2 & SIL_DMA_COMPLETE))
 460                         return;
 461         }
 462
 463         if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
 464                 /* this sometimes happens, just clear IRQ */
 465                 ap->ops->sff_check_status(ap);
 466                 return;
 467         }
 468
 469         /* Check whether we are expecting interrupt in this state */
 470         switch (ap->hsm_task_state) {
 471         case HSM_ST_FIRST:
 472                 /* Some pre-ATAPI-4 devices assert INTRQ
 473                  * at this state when ready to receive CDB.
 474                  */
 475
 476                 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
 477                  * The flag was turned on only for atapi devices.  No
 478                  * need to check ata_is_atapi(qc->tf.protocol) again.
 479                  */
 480                 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
 481                         goto err_hsm;
 482                 break;
 483         case HSM_ST_LAST:
 484                 if (ata_is_dma(qc->tf.protocol)) {
 485                         /* clear DMA-Start bit */
 486                         ap->ops->bmdma_stop(qc);
 487
 488                         if (bmdma2 & SIL_DMA_ERROR) {
 489                                 qc->err_mask |= AC_ERR_HOST_BUS;
 490                                 ap->hsm_task_state = HSM_ST_ERR;
 491                         }
 492                 }
 493                 break;
 494         case HSM_ST:
 495                 break;
 496         default:
 497                 goto err_hsm;
 498         }
 499
 500         /* check main status, clearing INTRQ */
 501         status = ap->ops->sff_check_status(ap);
 502         if (unlikely(status & ATA_BUSY))
 503                 goto err_hsm;
 504
 505         /* ack bmdma irq events */
 506         ata_bmdma_irq_clear(ap);
 507
 508         /* kick HSM in the ass */
 509         ata_sff_hsm_move(ap, qc, status, 0);
 510
 511         if (unlikely(qc->err_mask) && ata_is_dma(qc->tf.protocol))
 512                 ata_ehi_push_desc(ehi, "BMDMA2 stat 0x%x", bmdma2);
 513
 514         return;
 515
 516  err_hsm:
 517         qc->err_mask |= AC_ERR_HSM;
 518  freeze:
 519         ata_port_freeze(ap);
 520 }
 521
 522 static irqreturn_t sil_interrupt(int irq, void *dev_instance)
 523 {
 524         struct ata_host *host = dev_instance;
 525         void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
 526         int handled = 0;
 527         int i;
 528
 529         spin_lock(&host->lock);
 530
 531         for (i = 0; i < host->n_ports; i++) {
 532                 struct ata_port *ap = host->ports[i];
 533                 u32 bmdma2 = readl(mmio_base + sil_port[ap->port_no].bmdma2);
 534
 535                 /* turn off SATA_IRQ if not supported */
 536                 if (ap->flags & SIL_FLAG_NO_SATA_IRQ)
 537                         bmdma2 &= ~SIL_DMA_SATA_IRQ;
 538
 539                 if (bmdma2 == 0xffffffff ||
 540                     !(bmdma2 & (SIL_DMA_COMPLETE | SIL_DMA_SATA_IRQ)))
 541                         continue;
 542
 543                 sil_host_intr(ap, bmdma2);
 544                 handled = 1;
 545         }
 546
 547         spin_unlock(&host->lock);
 548
 549         return IRQ_RETVAL(handled);
 550 }
 551
 552 static void sil_freeze(struct ata_port *ap)
 553 {
 554         void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
 555         u32 tmp;
 556
 557         /* global IRQ mask doesn't block SATA IRQ, turn off explicitly */
 558         writel(0, mmio_base + sil_port[ap->port_no].sien);
 559
 560         /* plug IRQ */
 561         tmp = readl(mmio_base + SIL_SYSCFG);
 562         tmp |= SIL_MASK_IDE0_INT << ap->port_no;
 563         writel(tmp, mmio_base + SIL_SYSCFG);
 564         readl(mmio_base + SIL_SYSCFG);  /* flush */
 565
 566         /* Ensure DMA_ENABLE is off.
 567          *
 568          * This is because the controller will not give us access to the
 569          * taskfile registers while a DMA is in progress
 570          */
 571         iowrite8(ioread8(ap->ioaddr.bmdma_addr) & ~SIL_DMA_ENABLE,
 572                  ap->ioaddr.bmdma_addr);
 573
 574         /* According to ata_bmdma_stop, an HDMA transition requires
 575          * on PIO cycle. But we can't read a taskfile register.
 576          */
 577         ioread8(ap->ioaddr.bmdma_addr);
 578 }
 579
 580 static void sil_thaw(struct ata_port *ap)
 581 {
 582         void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR];
 583         u32 tmp;
 584
 585         /* clear IRQ */
 586         ap->ops->sff_check_status(ap);
 587         ata_bmdma_irq_clear(ap);
 588
 589         /* turn on SATA IRQ if supported */
 590         if (!(ap->flags & SIL_FLAG_NO_SATA_IRQ))
 591                 writel(SIL_SIEN_N, mmio_base + sil_port[ap->port_no].sien);
 592
 593         /* turn on IRQ */
 594         tmp = readl(mmio_base + SIL_SYSCFG);
 595         tmp &= ~(SIL_MASK_IDE0_INT << ap->port_no);
 596         writel(tmp, mmio_base + SIL_SYSCFG);
 597 }
 598
 599 /**
 600  *      sil_dev_config - Apply device/host-specific errata fixups
 601  *      @dev: Device to be examined
 602  *
 603  *      After the IDENTIFY [PACKET] DEVICE step is complete, and a
 604  *      device is known to be present, this function is called.
 605  *      We apply two errata fixups which are specific to Silicon Image,
 606  *      a Seagate and a Maxtor fixup.
 607  *
 608  *      For certain Seagate devices, we must limit the maximum sectors
 609  *      to under 8K.
 610  *
 611  *      For certain Maxtor devices, we must not program the drive
 612  *      beyond udma5.
 613  *
 614  *      Both fixups are unfairly pessimistic.  As soon as I get more
 615  *      information on these errata, I will create a more exhaustive
 616  *      list, and apply the fixups to only the specific
 617  *      devices/hosts/firmwares that need it.
 618  *
 619  *      20040111 - Seagate drives affected by the Mod15Write bug are blacklisted
 620  *      The Maxtor quirk is in the blacklist, but I'm keeping the original
 621  *      pessimistic fix for the following reasons...
 622  *      - There seems to be less info on it, only one device gleaned off the
 623  *      Windows driver, maybe only one is affected.  More info would be greatly
 624  *      appreciated.
 625  *      - But then again UDMA5 is hardly anything to complain about
 626  */
 627 static void sil_dev_config(struct ata_device *dev)
 628 {
 629         struct ata_port *ap = dev->link->ap;
 630         int print_info = ap->link.eh_context.i.flags & ATA_EHI_PRINTINFO;
 631         unsigned int n, quirks = 0;
 632         unsigned char model_num[ATA_ID_PROD_LEN + 1];
 633
 634         ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
 635
 636         for (n = 0; sil_blacklist[n].product; n++)
 637                 if (!strcmp(sil_blacklist[n].product, model_num)) {
 638                         quirks = sil_blacklist[n].quirk;
 639                         break;
 640                 }
 641
 642         /* limit requests to 15 sectors */
 643         if (slow_down ||
 644             ((ap->flags & SIL_FLAG_MOD15WRITE) &&
 645              (quirks & SIL_QUIRK_MOD15WRITE))) {
 646                 if (print_info)
 647                         ata_dev_printk(dev, KERN_INFO, "applying Seagate "
 648                                        "errata fix (mod15write workaround)\n");
 649                 dev->max_sectors = 15;
 650                 return;
 651         }
 652
 653         /* limit to udma5 */
 654         if (quirks & SIL_QUIRK_UDMA5MAX) {
 655                 if (print_info)
 656                         ata_dev_printk(dev, KERN_INFO, "applying Maxtor "
 657                                        "errata fix %s\n", model_num);
 658                 dev->udma_mask &= ATA_UDMA5;
 659                 return;
 660         }
 661 }
 662
 663 static void sil_init_controller(struct ata_host *host)
 664 {
 665         struct pci_dev *pdev = to_pci_dev(host->dev);
 666         void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR];
 667         u8 cls;
 668         u32 tmp;
 669         int i;
 670
 671         /* Initialize FIFO PCI bus arbitration */
 672         cls = sil_get_device_cache_line(pdev);
 673         if (cls) {
 674                 cls >>= 3;
 675                 cls++;  /* cls = (line_size/8)+1 */
 676                 for (i = 0; i < host->n_ports; i++)
 677                         writew(cls << 8 | cls,
 678                                mmio_base + sil_port[i].fifo_cfg);
 679         } else
 680                 dev_printk(KERN_WARNING, &pdev->dev,
 681                            "cache line size not set.  Driver may not function\n");
 682
 683         /* Apply R_ERR on DMA activate FIS errata workaround */
 684         if (host->ports[0]->flags & SIL_FLAG_RERR_ON_DMA_ACT) {
 685                 int cnt;
 686
 687                 for (i = 0, cnt = 0; i < host->n_ports; i++) {
 688                         tmp = readl(mmio_base + sil_port[i].sfis_cfg);
 689                         if ((tmp & 0x3) != 0x01)
 690                                 continue;
 691                         if (!cnt)
 692                                 dev_printk(KERN_INFO, &pdev->dev,
 693                                            "Applying R_ERR on DMA activate "
 694                                            "FIS errata fix\n");
 695                         writel(tmp & ~0x3, mmio_base + sil_port[i].sfis_cfg);
 696                         cnt++;
 697                 }
 698         }
 699
 700         if (host->n_ports == 4) {
 701                 /* flip the magic "make 4 ports work" bit */
 702                 tmp = readl(mmio_base + sil_port[2].bmdma);
 703                 if ((tmp & SIL_INTR_STEERING) == 0)
 704                         writel(tmp | SIL_INTR_STEERING,
 705                                mmio_base + sil_port[2].bmdma);
 706         }
 707 }
 708
 709 static bool sil_broken_system_poweroff(struct pci_dev *pdev)
 710 {
 711         static const struct dmi_system_id broken_systems[] = {
 712                 {
 713                         .ident = "HP Compaq nx6325",
 714                         .matches = {
 715                                 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
 716                                 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
 717                         },
 718                         /* PCI slot number of the controller */
 719                         .driver_data = (void *)0x12UL,
 720                 },
 721
 722                 { }     /* terminate list */
 723         };
 724         const struct dmi_system_id *dmi = dmi_first_match(broken_systems);
 725
 726         if (dmi) {
 727                 unsigned long slot = (unsigned long)dmi->driver_data;
 728                 /* apply the quirk only to on-board controllers */
 729                 return slot == PCI_SLOT(pdev->devfn);
 730         }
 731
 732         return false;
 733 }
 734
 735 static int sil_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 736 {
 737         static int printed_version;
 738         int board_id = ent->driver_data;
 739         struct ata_port_info pi = sil_port_info[board_id];
 740         const struct ata_port_info *ppi[] = { &pi, NULL };
 741         struct ata_host *host;
 742         void __iomem *mmio_base;
 743         int n_ports, rc;
 744         unsigned int i;
 745
 746         if (!printed_version++)
 747                 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
 748
 749         /* allocate host */
 750         n_ports = 2;
 751         if (board_id == sil_3114)
 752                 n_ports = 4;
 753
 754         if (sil_broken_system_poweroff(pdev)) {
 755                 pi.flags |= ATA_FLAG_NO_POWEROFF_SPINDOWN |
 756                                         ATA_FLAG_NO_HIBERNATE_SPINDOWN;
 757                 dev_info(&pdev->dev, "quirky BIOS, skipping spindown "
 758                                 "on poweroff and hibernation\n");
 759         }
 760
 761         host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
 762         if (!host)
 763                 return -ENOMEM;
 764
 765         /* acquire resources and fill host */
 766         rc = pcim_enable_device(pdev);
 767         if (rc)
 768                 return rc;
 769
 770         rc = pcim_iomap_regions(pdev, 1 << SIL_MMIO_BAR, DRV_NAME);
 771         if (rc == -EBUSY)
 772                 pcim_pin_device(pdev);
 773         if (rc)
 774                 return rc;
 775         host->iomap = pcim_iomap_table(pdev);
 776
 777         rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
 778         if (rc)
 779                 return rc;
 780         rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
 781         if (rc)
 782                 return rc;
 783
 784         mmio_base = host->iomap[SIL_MMIO_BAR];
 785
 786         for (i = 0; i < host->n_ports; i++) {
 787                 struct ata_port *ap = host->ports[i];
 788                 struct ata_ioports *ioaddr = &ap->ioaddr;
 789
 790                 ioaddr->cmd_addr = mmio_base + sil_port[i].tf;
 791                 ioaddr->altstatus_addr =
 792                 ioaddr->ctl_addr = mmio_base + sil_port[i].ctl;
 793                 ioaddr->bmdma_addr = mmio_base + sil_port[i].bmdma;
 794                 ioaddr->scr_addr = mmio_base + sil_port[i].scr;
 795                 ata_sff_std_ports(ioaddr);
 796
 797                 ata_port_pbar_desc(ap, SIL_MMIO_BAR, -1, "mmio");
 798                 ata_port_pbar_desc(ap, SIL_MMIO_BAR, sil_port[i].tf, "tf");
 799         }
 800
 801         /* initialize and activate */
 802         sil_init_controller(host);
 803
 804         pci_set_master(pdev);
 805         return ata_host_activate(host, pdev->irq, sil_interrupt, IRQF_SHARED,
 806                                  &sil_sht);
 807 }
 808
 809 #ifdef CONFIG_PM
 810 static int sil_pci_device_resume(struct pci_dev *pdev)
 811 {
 812         struct ata_host *host = dev_get_drvdata(&pdev->dev);
 813         int rc;
 814
 815         rc = ata_pci_device_do_resume(pdev);
 816         if (rc)
 817                 return rc;
 818
 819         sil_init_controller(host);
 820         ata_host_resume(host);
 821
 822         return 0;
 823 }
 824 #endif
 825
 826 static int __init sil_init(void)
 827 {
 828         return pci_register_driver(&sil_pci_driver);
 829 }
 830
 831 static void __exit sil_exit(void)
 832 {
 833         pci_unregister_driver(&sil_pci_driver);
 834 }
 835
 836
 837 module_init(sil_init);
 838 module_exit(sil_exit);