1 /* 2 * sata_sil.c - Silicon Image SATA 3 * 4 * Maintained by: Tejun Heo <tj@kernel.org> 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/blkdev.h> 41 #include <linux/delay.h> 42 #include <linux/interrupt.h> 43 #include <linux/device.h> 44 #include <scsi/scsi_host.h> 45 #include <linux/libata.h> 46 #include <linux/dmi.h> 47 48 #define DRV_NAME "sata_sil" 49 #define DRV_VERSION "2.4" 50 51 #define SIL_DMA_BOUNDARY 0x7fffffffUL 52 53 enum { 54 SIL_MMIO_BAR = 5, 55 56 /* 57 * host flags 58 */ 59 SIL_FLAG_NO_SATA_IRQ = (1 << 28), 60 SIL_FLAG_RERR_ON_DMA_ACT = (1 << 29), 61 SIL_FLAG_MOD15WRITE = (1 << 30), 62 63 SIL_DFL_PORT_FLAGS = ATA_FLAG_SATA, 64 65 /* 66 * Controller IDs 67 */ 68 sil_3112 = 0, 69 sil_3112_no_sata_irq = 1, 70 sil_3512 = 2, 71 sil_3114 = 3, 72 73 /* 74 * Register offsets 75 */ 76 SIL_SYSCFG = 0x48, 77 78 /* 79 * Register bits 80 */ 81 /* SYSCFG */ 82 SIL_MASK_IDE0_INT = (1 << 22), 83 SIL_MASK_IDE1_INT = (1 << 23), 84 SIL_MASK_IDE2_INT = (1 << 24), 85 SIL_MASK_IDE3_INT = (1 << 25), 86 SIL_MASK_2PORT = SIL_MASK_IDE0_INT | SIL_MASK_IDE1_INT, 87 SIL_MASK_4PORT = SIL_MASK_2PORT | 88 SIL_MASK_IDE2_INT | SIL_MASK_IDE3_INT, 89 90 /* BMDMA/BMDMA2 */ 91 SIL_INTR_STEERING = (1 << 1), 92 93 SIL_DMA_ENABLE = (1 << 0), /* DMA run switch */ 94 SIL_DMA_RDWR = (1 << 3), /* DMA Rd-Wr */ 95 SIL_DMA_SATA_IRQ = (1 << 4), /* OR of all SATA IRQs */ 96 SIL_DMA_ACTIVE = (1 << 16), /* DMA running */ 97 SIL_DMA_ERROR = (1 << 17), /* PCI bus error */ 98 SIL_DMA_COMPLETE = (1 << 18), /* cmd complete / IRQ pending */ 99 SIL_DMA_N_SATA_IRQ = (1 << 6), /* SATA_IRQ for the next channel */ 100 SIL_DMA_N_ACTIVE = (1 << 24), /* ACTIVE for the next channel */ 101 SIL_DMA_N_ERROR = (1 << 25), /* ERROR for the next channel */ 102 SIL_DMA_N_COMPLETE = (1 << 26), /* COMPLETE for the next channel */ 103 104 /* SIEN */ 105 SIL_SIEN_N = (1 << 16), /* triggered by SError.N */ 106 107 /* 108 * Others 109 */ 110 SIL_QUIRK_MOD15WRITE = (1 << 0), 111 SIL_QUIRK_UDMA5MAX = (1 << 1), 112 }; 113 114 static int sil_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); 115 #ifdef CONFIG_PM 116 static int sil_pci_device_resume(struct pci_dev *pdev); 117 #endif 118 static void sil_dev_config(struct ata_device *dev); 119 static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); 120 static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); 121 static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed); 122 static void sil_qc_prep(struct ata_queued_cmd *qc); 123 static void sil_bmdma_setup(struct ata_queued_cmd *qc); 124 static void sil_bmdma_start(struct ata_queued_cmd *qc); 125 static void sil_bmdma_stop(struct ata_queued_cmd *qc); 126 static void sil_freeze(struct ata_port *ap); 127 static void sil_thaw(struct ata_port *ap); 128 129 130 static const struct pci_device_id sil_pci_tbl[] = { 131 { PCI_VDEVICE(CMD, 0x3112), sil_3112 }, 132 { PCI_VDEVICE(CMD, 0x0240), sil_3112 }, 133 { PCI_VDEVICE(CMD, 0x3512), sil_3512 }, 134 { PCI_VDEVICE(CMD, 0x3114), sil_3114 }, 135 { PCI_VDEVICE(ATI, 0x436e), sil_3112 }, 136 { PCI_VDEVICE(ATI, 0x4379), sil_3112_no_sata_irq }, 137 { PCI_VDEVICE(ATI, 0x437a), sil_3112_no_sata_irq }, 138 139 { } /* terminate list */ 140 }; 141 142 143 /* TODO firmware versions should be added - eric */ 144 static const struct sil_drivelist { 145 const char *product; 146 unsigned int quirk; 147 } sil_blacklist [] = { 148 { "ST320012AS", SIL_QUIRK_MOD15WRITE }, 149 { "ST330013AS", SIL_QUIRK_MOD15WRITE }, 150 { "ST340017AS", SIL_QUIRK_MOD15WRITE }, 151 { "ST360015AS", SIL_QUIRK_MOD15WRITE }, 152 { "ST380023AS", SIL_QUIRK_MOD15WRITE }, 153 { "ST3120023AS", SIL_QUIRK_MOD15WRITE }, 154 { "ST340014ASL", SIL_QUIRK_MOD15WRITE }, 155 { "ST360014ASL", SIL_QUIRK_MOD15WRITE }, 156 { "ST380011ASL", SIL_QUIRK_MOD15WRITE }, 157 { "ST3120022ASL", SIL_QUIRK_MOD15WRITE }, 158 { "ST3160021ASL", SIL_QUIRK_MOD15WRITE }, 159 { "TOSHIBA MK2561GSYN", SIL_QUIRK_MOD15WRITE }, 160 { "Maxtor 4D060H3", SIL_QUIRK_UDMA5MAX }, 161 { } 162 }; 163 164 static struct pci_driver sil_pci_driver = { 165 .name = DRV_NAME, 166 .id_table = sil_pci_tbl, 167 .probe = sil_init_one, 168 .remove = ata_pci_remove_one, 169 #ifdef CONFIG_PM 170 .suspend = ata_pci_device_suspend, 171 .resume = sil_pci_device_resume, 172 #endif 173 }; 174 175 static struct scsi_host_template sil_sht = { 176 ATA_BASE_SHT(DRV_NAME), 177 /** These controllers support Large Block Transfer which allows 178 transfer chunks up to 2GB and which cross 64KB boundaries, 179 therefore the DMA limits are more relaxed than standard ATA SFF. */ 180 .dma_boundary = SIL_DMA_BOUNDARY, 181 .sg_tablesize = ATA_MAX_PRD 182 }; 183 184 static struct ata_port_operations sil_ops = { 185 .inherits = &ata_bmdma32_port_ops, 186 .dev_config = sil_dev_config, 187 .set_mode = sil_set_mode, 188 .bmdma_setup = sil_bmdma_setup, 189 .bmdma_start = sil_bmdma_start, 190 .bmdma_stop = sil_bmdma_stop, 191 .qc_prep = sil_qc_prep, 192 .freeze = sil_freeze, 193 .thaw = sil_thaw, 194 .scr_read = sil_scr_read, 195 .scr_write = sil_scr_write, 196 }; 197 198 static const struct ata_port_info sil_port_info[] = { 199 /* sil_3112 */ 200 { 201 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE, 202 .pio_mask = ATA_PIO4, 203 .mwdma_mask = ATA_MWDMA2, 204 .udma_mask = ATA_UDMA5, 205 .port_ops = &sil_ops, 206 }, 207 /* sil_3112_no_sata_irq */ 208 { 209 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_MOD15WRITE | 210 SIL_FLAG_NO_SATA_IRQ, 211 .pio_mask = ATA_PIO4, 212 .mwdma_mask = ATA_MWDMA2, 213 .udma_mask = ATA_UDMA5, 214 .port_ops = &sil_ops, 215 }, 216 /* sil_3512 */ 217 { 218 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT, 219 .pio_mask = ATA_PIO4, 220 .mwdma_mask = ATA_MWDMA2, 221 .udma_mask = ATA_UDMA5, 222 .port_ops = &sil_ops, 223 }, 224 /* sil_3114 */ 225 { 226 .flags = SIL_DFL_PORT_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT, 227 .pio_mask = ATA_PIO4, 228 .mwdma_mask = ATA_MWDMA2, 229 .udma_mask = ATA_UDMA5, 230 .port_ops = &sil_ops, 231 }, 232 }; 233 234 /* per-port register offsets */ 235 /* TODO: we can probably calculate rather than use a table */ 236 static const struct { 237 unsigned long tf; /* ATA taskfile register block */ 238 unsigned long ctl; /* ATA control/altstatus register block */ 239 unsigned long bmdma; /* DMA register block */ 240 unsigned long bmdma2; /* DMA register block #2 */ 241 unsigned long fifo_cfg; /* FIFO Valid Byte Count and Control */ 242 unsigned long scr; /* SATA control register block */ 243 unsigned long sien; /* SATA Interrupt Enable register */ 244 unsigned long xfer_mode;/* data transfer mode register */ 245 unsigned long sfis_cfg; /* SATA FIS reception config register */ 246 } sil_port[] = { 247 /* port 0 ... */ 248 /* tf ctl bmdma bmdma2 fifo scr sien mode sfis */ 249 { 0x80, 0x8A, 0x0, 0x10, 0x40, 0x100, 0x148, 0xb4, 0x14c }, 250 { 0xC0, 0xCA, 0x8, 0x18, 0x44, 0x180, 0x1c8, 0xf4, 0x1cc }, 251 { 0x280, 0x28A, 0x200, 0x210, 0x240, 0x300, 0x348, 0x2b4, 0x34c }, 252 { 0x2C0, 0x2CA, 0x208, 0x218, 0x244, 0x380, 0x3c8, 0x2f4, 0x3cc }, 253 /* ... port 3 */ 254 }; 255 256 MODULE_AUTHOR("Jeff Garzik"); 257 MODULE_DESCRIPTION("low-level driver for Silicon Image SATA controller"); 258 MODULE_LICENSE("GPL"); 259 MODULE_DEVICE_TABLE(pci, sil_pci_tbl); 260 MODULE_VERSION(DRV_VERSION); 261 262 static int slow_down; 263 module_param(slow_down, int, 0444); 264 MODULE_PARM_DESC(slow_down, "Sledgehammer used to work around random problems, by limiting commands to 15 sectors (0=off, 1=on)"); 265 266 267 static void sil_bmdma_stop(struct ata_queued_cmd *qc) 268 { 269 struct ata_port *ap = qc->ap; 270 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR]; 271 void __iomem *bmdma2 = mmio_base + sil_port[ap->port_no].bmdma2; 272 273 /* clear start/stop bit - can safely always write 0 */ 274 iowrite8(0, bmdma2); 275 276 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */ 277 ata_sff_dma_pause(ap); 278 } 279 280 static void sil_bmdma_setup(struct ata_queued_cmd *qc) 281 { 282 struct ata_port *ap = qc->ap; 283 void __iomem *bmdma = ap->ioaddr.bmdma_addr; 284 285 /* load PRD table addr. */ 286 iowrite32(ap->bmdma_prd_dma, bmdma + ATA_DMA_TABLE_OFS); 287 288 /* issue r/w command */ 289 ap->ops->sff_exec_command(ap, &qc->tf); 290 } 291 292 static void sil_bmdma_start(struct ata_queued_cmd *qc) 293 { 294 unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE); 295 struct ata_port *ap = qc->ap; 296 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR]; 297 void __iomem *bmdma2 = mmio_base + sil_port[ap->port_no].bmdma2; 298 u8 dmactl = ATA_DMA_START; 299 300 /* set transfer direction, start host DMA transaction 301 Note: For Large Block Transfer to work, the DMA must be started 302 using the bmdma2 register. */ 303 if (!rw) 304 dmactl |= ATA_DMA_WR; 305 iowrite8(dmactl, bmdma2); 306 } 307 308 /* The way God intended PCI IDE scatter/gather lists to look and behave... */ 309 static void sil_fill_sg(struct ata_queued_cmd *qc) 310 { 311 struct scatterlist *sg; 312 struct ata_port *ap = qc->ap; 313 struct ata_bmdma_prd *prd, *last_prd = NULL; 314 unsigned int si; 315 316 prd = &ap->bmdma_prd[0]; 317 for_each_sg(qc->sg, sg, qc->n_elem, si) { 318 /* Note h/w doesn't support 64-bit, so we unconditionally 319 * truncate dma_addr_t to u32. 320 */ 321 u32 addr = (u32) sg_dma_address(sg); 322 u32 sg_len = sg_dma_len(sg); 323 324 prd->addr = cpu_to_le32(addr); 325 prd->flags_len = cpu_to_le32(sg_len); 326 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", si, addr, sg_len); 327 328 last_prd = prd; 329 prd++; 330 } 331 332 if (likely(last_prd)) 333 last_prd->flags_len |= cpu_to_le32(ATA_PRD_EOT); 334 } 335 336 static void sil_qc_prep(struct ata_queued_cmd *qc) 337 { 338 if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 339 return; 340 341 sil_fill_sg(qc); 342 } 343 344 static unsigned char sil_get_device_cache_line(struct pci_dev *pdev) 345 { 346 u8 cache_line = 0; 347 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line); 348 return cache_line; 349 } 350 351 /** 352 * sil_set_mode - wrap set_mode functions 353 * @link: link to set up 354 * @r_failed: returned device when we fail 355 * 356 * Wrap the libata method for device setup as after the setup we need 357 * to inspect the results and do some configuration work 358 */ 359 360 static int sil_set_mode(struct ata_link *link, struct ata_device **r_failed) 361 { 362 struct ata_port *ap = link->ap; 363 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR]; 364 void __iomem *addr = mmio_base + sil_port[ap->port_no].xfer_mode; 365 struct ata_device *dev; 366 u32 tmp, dev_mode[2] = { }; 367 int rc; 368 369 rc = ata_do_set_mode(link, r_failed); 370 if (rc) 371 return rc; 372 373 ata_for_each_dev(dev, link, ALL) { 374 if (!ata_dev_enabled(dev)) 375 dev_mode[dev->devno] = 0; /* PIO0/1/2 */ 376 else if (dev->flags & ATA_DFLAG_PIO) 377 dev_mode[dev->devno] = 1; /* PIO3/4 */ 378 else 379 dev_mode[dev->devno] = 3; /* UDMA */ 380 /* value 2 indicates MDMA */ 381 } 382 383 tmp = readl(addr); 384 tmp &= ~((1<<5) | (1<<4) | (1<<1) | (1<<0)); 385 tmp |= dev_mode[0]; 386 tmp |= (dev_mode[1] << 4); 387 writel(tmp, addr); 388 readl(addr); /* flush */ 389 return 0; 390 } 391 392 static inline void __iomem *sil_scr_addr(struct ata_port *ap, 393 unsigned int sc_reg) 394 { 395 void __iomem *offset = ap->ioaddr.scr_addr; 396 397 switch (sc_reg) { 398 case SCR_STATUS: 399 return offset + 4; 400 case SCR_ERROR: 401 return offset + 8; 402 case SCR_CONTROL: 403 return offset; 404 default: 405 /* do nothing */ 406 break; 407 } 408 409 return NULL; 410 } 411 412 static int sil_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val) 413 { 414 void __iomem *mmio = sil_scr_addr(link->ap, sc_reg); 415 416 if (mmio) { 417 *val = readl(mmio); 418 return 0; 419 } 420 return -EINVAL; 421 } 422 423 static int sil_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val) 424 { 425 void __iomem *mmio = sil_scr_addr(link->ap, sc_reg); 426 427 if (mmio) { 428 writel(val, mmio); 429 return 0; 430 } 431 return -EINVAL; 432 } 433 434 static void sil_host_intr(struct ata_port *ap, u32 bmdma2) 435 { 436 struct ata_eh_info *ehi = &ap->link.eh_info; 437 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag); 438 u8 status; 439 440 if (unlikely(bmdma2 & SIL_DMA_SATA_IRQ)) { 441 u32 serror = 0xffffffff; 442 443 /* SIEN doesn't mask SATA IRQs on some 3112s. Those 444 * controllers continue to assert IRQ as long as 445 * SError bits are pending. Clear SError immediately. 446 */ 447 sil_scr_read(&ap->link, SCR_ERROR, &serror); 448 sil_scr_write(&ap->link, SCR_ERROR, serror); 449 450 /* Sometimes spurious interrupts occur, double check 451 * it's PHYRDY CHG. 452 */ 453 if (serror & SERR_PHYRDY_CHG) { 454 ap->link.eh_info.serror |= serror; 455 goto freeze; 456 } 457 458 if (!(bmdma2 & SIL_DMA_COMPLETE)) 459 return; 460 } 461 462 if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) { 463 /* this sometimes happens, just clear IRQ */ 464 ap->ops->sff_check_status(ap); 465 return; 466 } 467 468 /* Check whether we are expecting interrupt in this state */ 469 switch (ap->hsm_task_state) { 470 case HSM_ST_FIRST: 471 /* Some pre-ATAPI-4 devices assert INTRQ 472 * at this state when ready to receive CDB. 473 */ 474 475 /* Check the ATA_DFLAG_CDB_INTR flag is enough here. 476 * The flag was turned on only for atapi devices. No 477 * need to check ata_is_atapi(qc->tf.protocol) again. 478 */ 479 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) 480 goto err_hsm; 481 break; 482 case HSM_ST_LAST: 483 if (ata_is_dma(qc->tf.protocol)) { 484 /* clear DMA-Start bit */ 485 ap->ops->bmdma_stop(qc); 486 487 if (bmdma2 & SIL_DMA_ERROR) { 488 qc->err_mask |= AC_ERR_HOST_BUS; 489 ap->hsm_task_state = HSM_ST_ERR; 490 } 491 } 492 break; 493 case HSM_ST: 494 break; 495 default: 496 goto err_hsm; 497 } 498 499 /* check main status, clearing INTRQ */ 500 status = ap->ops->sff_check_status(ap); 501 if (unlikely(status & ATA_BUSY)) 502 goto err_hsm; 503 504 /* ack bmdma irq events */ 505 ata_bmdma_irq_clear(ap); 506 507 /* kick HSM in the ass */ 508 ata_sff_hsm_move(ap, qc, status, 0); 509 510 if (unlikely(qc->err_mask) && ata_is_dma(qc->tf.protocol)) 511 ata_ehi_push_desc(ehi, "BMDMA2 stat 0x%x", bmdma2); 512 513 return; 514 515 err_hsm: 516 qc->err_mask |= AC_ERR_HSM; 517 freeze: 518 ata_port_freeze(ap); 519 } 520 521 static irqreturn_t sil_interrupt(int irq, void *dev_instance) 522 { 523 struct ata_host *host = dev_instance; 524 void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR]; 525 int handled = 0; 526 int i; 527 528 spin_lock(&host->lock); 529 530 for (i = 0; i < host->n_ports; i++) { 531 struct ata_port *ap = host->ports[i]; 532 u32 bmdma2 = readl(mmio_base + sil_port[ap->port_no].bmdma2); 533 534 /* turn off SATA_IRQ if not supported */ 535 if (ap->flags & SIL_FLAG_NO_SATA_IRQ) 536 bmdma2 &= ~SIL_DMA_SATA_IRQ; 537 538 if (bmdma2 == 0xffffffff || 539 !(bmdma2 & (SIL_DMA_COMPLETE | SIL_DMA_SATA_IRQ))) 540 continue; 541 542 sil_host_intr(ap, bmdma2); 543 handled = 1; 544 } 545 546 spin_unlock(&host->lock); 547 548 return IRQ_RETVAL(handled); 549 } 550 551 static void sil_freeze(struct ata_port *ap) 552 { 553 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR]; 554 u32 tmp; 555 556 /* global IRQ mask doesn't block SATA IRQ, turn off explicitly */ 557 writel(0, mmio_base + sil_port[ap->port_no].sien); 558 559 /* plug IRQ */ 560 tmp = readl(mmio_base + SIL_SYSCFG); 561 tmp |= SIL_MASK_IDE0_INT << ap->port_no; 562 writel(tmp, mmio_base + SIL_SYSCFG); 563 readl(mmio_base + SIL_SYSCFG); /* flush */ 564 565 /* Ensure DMA_ENABLE is off. 566 * 567 * This is because the controller will not give us access to the 568 * taskfile registers while a DMA is in progress 569 */ 570 iowrite8(ioread8(ap->ioaddr.bmdma_addr) & ~SIL_DMA_ENABLE, 571 ap->ioaddr.bmdma_addr); 572 573 /* According to ata_bmdma_stop, an HDMA transition requires 574 * on PIO cycle. But we can't read a taskfile register. 575 */ 576 ioread8(ap->ioaddr.bmdma_addr); 577 } 578 579 static void sil_thaw(struct ata_port *ap) 580 { 581 void __iomem *mmio_base = ap->host->iomap[SIL_MMIO_BAR]; 582 u32 tmp; 583 584 /* clear IRQ */ 585 ap->ops->sff_check_status(ap); 586 ata_bmdma_irq_clear(ap); 587 588 /* turn on SATA IRQ if supported */ 589 if (!(ap->flags & SIL_FLAG_NO_SATA_IRQ)) 590 writel(SIL_SIEN_N, mmio_base + sil_port[ap->port_no].sien); 591 592 /* turn on IRQ */ 593 tmp = readl(mmio_base + SIL_SYSCFG); 594 tmp &= ~(SIL_MASK_IDE0_INT << ap->port_no); 595 writel(tmp, mmio_base + SIL_SYSCFG); 596 } 597 598 /** 599 * sil_dev_config - Apply device/host-specific errata fixups 600 * @dev: Device to be examined 601 * 602 * After the IDENTIFY [PACKET] DEVICE step is complete, and a 603 * device is known to be present, this function is called. 604 * We apply two errata fixups which are specific to Silicon Image, 605 * a Seagate and a Maxtor fixup. 606 * 607 * For certain Seagate devices, we must limit the maximum sectors 608 * to under 8K. 609 * 610 * For certain Maxtor devices, we must not program the drive 611 * beyond udma5. 612 * 613 * Both fixups are unfairly pessimistic. As soon as I get more 614 * information on these errata, I will create a more exhaustive 615 * list, and apply the fixups to only the specific 616 * devices/hosts/firmwares that need it. 617 * 618 * 20040111 - Seagate drives affected by the Mod15Write bug are blacklisted 619 * The Maxtor quirk is in the blacklist, but I'm keeping the original 620 * pessimistic fix for the following reasons... 621 * - There seems to be less info on it, only one device gleaned off the 622 * Windows driver, maybe only one is affected. More info would be greatly 623 * appreciated. 624 * - But then again UDMA5 is hardly anything to complain about 625 */ 626 static void sil_dev_config(struct ata_device *dev) 627 { 628 struct ata_port *ap = dev->link->ap; 629 int print_info = ap->link.eh_context.i.flags & ATA_EHI_PRINTINFO; 630 unsigned int n, quirks = 0; 631 unsigned char model_num[ATA_ID_PROD_LEN + 1]; 632 633 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 634 635 for (n = 0; sil_blacklist[n].product; n++) 636 if (!strcmp(sil_blacklist[n].product, model_num)) { 637 quirks = sil_blacklist[n].quirk; 638 break; 639 } 640 641 /* limit requests to 15 sectors */ 642 if (slow_down || 643 ((ap->flags & SIL_FLAG_MOD15WRITE) && 644 (quirks & SIL_QUIRK_MOD15WRITE))) { 645 if (print_info) 646 ata_dev_info(dev, 647 "applying Seagate errata fix (mod15write workaround)\n"); 648 dev->max_sectors = 15; 649 return; 650 } 651 652 /* limit to udma5 */ 653 if (quirks & SIL_QUIRK_UDMA5MAX) { 654 if (print_info) 655 ata_dev_info(dev, "applying Maxtor errata fix %s\n", 656 model_num); 657 dev->udma_mask &= ATA_UDMA5; 658 return; 659 } 660 } 661 662 static void sil_init_controller(struct ata_host *host) 663 { 664 struct pci_dev *pdev = to_pci_dev(host->dev); 665 void __iomem *mmio_base = host->iomap[SIL_MMIO_BAR]; 666 u8 cls; 667 u32 tmp; 668 int i; 669 670 /* Initialize FIFO PCI bus arbitration */ 671 cls = sil_get_device_cache_line(pdev); 672 if (cls) { 673 cls >>= 3; 674 cls++; /* cls = (line_size/8)+1 */ 675 for (i = 0; i < host->n_ports; i++) 676 writew(cls << 8 | cls, 677 mmio_base + sil_port[i].fifo_cfg); 678 } else 679 dev_warn(&pdev->dev, 680 "cache line size not set. Driver may not function\n"); 681 682 /* Apply R_ERR on DMA activate FIS errata workaround */ 683 if (host->ports[0]->flags & SIL_FLAG_RERR_ON_DMA_ACT) { 684 int cnt; 685 686 for (i = 0, cnt = 0; i < host->n_ports; i++) { 687 tmp = readl(mmio_base + sil_port[i].sfis_cfg); 688 if ((tmp & 0x3) != 0x01) 689 continue; 690 if (!cnt) 691 dev_info(&pdev->dev, 692 "Applying R_ERR on DMA activate FIS errata fix\n"); 693 writel(tmp & ~0x3, mmio_base + sil_port[i].sfis_cfg); 694 cnt++; 695 } 696 } 697 698 if (host->n_ports == 4) { 699 /* flip the magic "make 4 ports work" bit */ 700 tmp = readl(mmio_base + sil_port[2].bmdma); 701 if ((tmp & SIL_INTR_STEERING) == 0) 702 writel(tmp | SIL_INTR_STEERING, 703 mmio_base + sil_port[2].bmdma); 704 } 705 } 706 707 static bool sil_broken_system_poweroff(struct pci_dev *pdev) 708 { 709 static const struct dmi_system_id broken_systems[] = { 710 { 711 .ident = "HP Compaq nx6325", 712 .matches = { 713 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 714 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 715 }, 716 /* PCI slot number of the controller */ 717 .driver_data = (void *)0x12UL, 718 }, 719 720 { } /* terminate list */ 721 }; 722 const struct dmi_system_id *dmi = dmi_first_match(broken_systems); 723 724 if (dmi) { 725 unsigned long slot = (unsigned long)dmi->driver_data; 726 /* apply the quirk only to on-board controllers */ 727 return slot == PCI_SLOT(pdev->devfn); 728 } 729 730 return false; 731 } 732 733 static int sil_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 734 { 735 int board_id = ent->driver_data; 736 struct ata_port_info pi = sil_port_info[board_id]; 737 const struct ata_port_info *ppi[] = { &pi, NULL }; 738 struct ata_host *host; 739 void __iomem *mmio_base; 740 int n_ports, rc; 741 unsigned int i; 742 743 ata_print_version_once(&pdev->dev, DRV_VERSION); 744 745 /* allocate host */ 746 n_ports = 2; 747 if (board_id == sil_3114) 748 n_ports = 4; 749 750 if (sil_broken_system_poweroff(pdev)) { 751 pi.flags |= ATA_FLAG_NO_POWEROFF_SPINDOWN | 752 ATA_FLAG_NO_HIBERNATE_SPINDOWN; 753 dev_info(&pdev->dev, "quirky BIOS, skipping spindown " 754 "on poweroff and hibernation\n"); 755 } 756 757 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports); 758 if (!host) 759 return -ENOMEM; 760 761 /* acquire resources and fill host */ 762 rc = pcim_enable_device(pdev); 763 if (rc) 764 return rc; 765 766 rc = pcim_iomap_regions(pdev, 1 << SIL_MMIO_BAR, DRV_NAME); 767 if (rc == -EBUSY) 768 pcim_pin_device(pdev); 769 if (rc) 770 return rc; 771 host->iomap = pcim_iomap_table(pdev); 772 773 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK); 774 if (rc) 775 return rc; 776 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK); 777 if (rc) 778 return rc; 779 780 mmio_base = host->iomap[SIL_MMIO_BAR]; 781 782 for (i = 0; i < host->n_ports; i++) { 783 struct ata_port *ap = host->ports[i]; 784 struct ata_ioports *ioaddr = &ap->ioaddr; 785 786 ioaddr->cmd_addr = mmio_base + sil_port[i].tf; 787 ioaddr->altstatus_addr = 788 ioaddr->ctl_addr = mmio_base + sil_port[i].ctl; 789 ioaddr->bmdma_addr = mmio_base + sil_port[i].bmdma; 790 ioaddr->scr_addr = mmio_base + sil_port[i].scr; 791 ata_sff_std_ports(ioaddr); 792 793 ata_port_pbar_desc(ap, SIL_MMIO_BAR, -1, "mmio"); 794 ata_port_pbar_desc(ap, SIL_MMIO_BAR, sil_port[i].tf, "tf"); 795 } 796 797 /* initialize and activate */ 798 sil_init_controller(host); 799 800 pci_set_master(pdev); 801 return ata_host_activate(host, pdev->irq, sil_interrupt, IRQF_SHARED, 802 &sil_sht); 803 } 804 805 #ifdef CONFIG_PM 806 static int sil_pci_device_resume(struct pci_dev *pdev) 807 { 808 struct ata_host *host = pci_get_drvdata(pdev); 809 int rc; 810 811 rc = ata_pci_device_do_resume(pdev); 812 if (rc) 813 return rc; 814 815 sil_init_controller(host); 816 ata_host_resume(host); 817 818 return 0; 819 } 820 #endif 821 822 module_pci_driver(sil_pci_driver); 823