ide-iops.c revision 7469aaf6a30f4187ed6de7c0aed5c2dd2d1c2d31
1/* 2 * linux/drivers/ide/ide-iops.c Version 0.37 Mar 05, 2003 3 * 4 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org> 5 * Copyright (C) 2003 Red Hat <alan@redhat.com> 6 * 7 */ 8 9#include <linux/module.h> 10#include <linux/types.h> 11#include <linux/string.h> 12#include <linux/kernel.h> 13#include <linux/timer.h> 14#include <linux/mm.h> 15#include <linux/interrupt.h> 16#include <linux/major.h> 17#include <linux/errno.h> 18#include <linux/genhd.h> 19#include <linux/blkpg.h> 20#include <linux/slab.h> 21#include <linux/pci.h> 22#include <linux/delay.h> 23#include <linux/hdreg.h> 24#include <linux/ide.h> 25#include <linux/bitops.h> 26#include <linux/nmi.h> 27 28#include <asm/byteorder.h> 29#include <asm/irq.h> 30#include <asm/uaccess.h> 31#include <asm/io.h> 32 33/* 34 * Conventional PIO operations for ATA devices 35 */ 36 37static u8 ide_inb (unsigned long port) 38{ 39 return (u8) inb(port); 40} 41 42static u16 ide_inw (unsigned long port) 43{ 44 return (u16) inw(port); 45} 46 47static void ide_insw (unsigned long port, void *addr, u32 count) 48{ 49 insw(port, addr, count); 50} 51 52static void ide_insl (unsigned long port, void *addr, u32 count) 53{ 54 insl(port, addr, count); 55} 56 57static void ide_outb (u8 val, unsigned long port) 58{ 59 outb(val, port); 60} 61 62static void ide_outbsync (ide_drive_t *drive, u8 addr, unsigned long port) 63{ 64 outb(addr, port); 65} 66 67static void ide_outw (u16 val, unsigned long port) 68{ 69 outw(val, port); 70} 71 72static void ide_outsw (unsigned long port, void *addr, u32 count) 73{ 74 outsw(port, addr, count); 75} 76 77static void ide_outsl (unsigned long port, void *addr, u32 count) 78{ 79 outsl(port, addr, count); 80} 81 82void default_hwif_iops (ide_hwif_t *hwif) 83{ 84 hwif->OUTB = ide_outb; 85 hwif->OUTBSYNC = ide_outbsync; 86 hwif->OUTW = ide_outw; 87 hwif->OUTSW = ide_outsw; 88 hwif->OUTSL = ide_outsl; 89 hwif->INB = ide_inb; 90 hwif->INW = ide_inw; 91 hwif->INSW = ide_insw; 92 hwif->INSL = ide_insl; 93} 94 95/* 96 * MMIO operations, typically used for SATA controllers 97 */ 98 99static u8 ide_mm_inb (unsigned long port) 100{ 101 return (u8) readb((void __iomem *) port); 102} 103 104static u16 ide_mm_inw (unsigned long port) 105{ 106 return (u16) readw((void __iomem *) port); 107} 108 109static void ide_mm_insw (unsigned long port, void *addr, u32 count) 110{ 111 __ide_mm_insw((void __iomem *) port, addr, count); 112} 113 114static void ide_mm_insl (unsigned long port, void *addr, u32 count) 115{ 116 __ide_mm_insl((void __iomem *) port, addr, count); 117} 118 119static void ide_mm_outb (u8 value, unsigned long port) 120{ 121 writeb(value, (void __iomem *) port); 122} 123 124static void ide_mm_outbsync (ide_drive_t *drive, u8 value, unsigned long port) 125{ 126 writeb(value, (void __iomem *) port); 127} 128 129static void ide_mm_outw (u16 value, unsigned long port) 130{ 131 writew(value, (void __iomem *) port); 132} 133 134static void ide_mm_outsw (unsigned long port, void *addr, u32 count) 135{ 136 __ide_mm_outsw((void __iomem *) port, addr, count); 137} 138 139static void ide_mm_outsl (unsigned long port, void *addr, u32 count) 140{ 141 __ide_mm_outsl((void __iomem *) port, addr, count); 142} 143 144void default_hwif_mmiops (ide_hwif_t *hwif) 145{ 146 hwif->OUTB = ide_mm_outb; 147 /* Most systems will need to override OUTBSYNC, alas however 148 this one is controller specific! */ 149 hwif->OUTBSYNC = ide_mm_outbsync; 150 hwif->OUTW = ide_mm_outw; 151 hwif->OUTSW = ide_mm_outsw; 152 hwif->OUTSL = ide_mm_outsl; 153 hwif->INB = ide_mm_inb; 154 hwif->INW = ide_mm_inw; 155 hwif->INSW = ide_mm_insw; 156 hwif->INSL = ide_mm_insl; 157} 158 159EXPORT_SYMBOL(default_hwif_mmiops); 160 161u32 ide_read_24 (ide_drive_t *drive) 162{ 163 u8 hcyl = HWIF(drive)->INB(IDE_HCYL_REG); 164 u8 lcyl = HWIF(drive)->INB(IDE_LCYL_REG); 165 u8 sect = HWIF(drive)->INB(IDE_SECTOR_REG); 166 return (hcyl<<16)|(lcyl<<8)|sect; 167} 168 169void SELECT_DRIVE (ide_drive_t *drive) 170{ 171 if (HWIF(drive)->selectproc) 172 HWIF(drive)->selectproc(drive); 173 HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG); 174} 175 176EXPORT_SYMBOL(SELECT_DRIVE); 177 178void SELECT_INTERRUPT (ide_drive_t *drive) 179{ 180 if (HWIF(drive)->intrproc) 181 HWIF(drive)->intrproc(drive); 182 else 183 HWIF(drive)->OUTB(drive->ctl|2, IDE_CONTROL_REG); 184} 185 186void SELECT_MASK (ide_drive_t *drive, int mask) 187{ 188 if (HWIF(drive)->maskproc) 189 HWIF(drive)->maskproc(drive, mask); 190} 191 192void QUIRK_LIST (ide_drive_t *drive) 193{ 194 if (HWIF(drive)->quirkproc) 195 drive->quirk_list = HWIF(drive)->quirkproc(drive); 196} 197 198/* 199 * Some localbus EIDE interfaces require a special access sequence 200 * when using 32-bit I/O instructions to transfer data. We call this 201 * the "vlb_sync" sequence, which consists of three successive reads 202 * of the sector count register location, with interrupts disabled 203 * to ensure that the reads all happen together. 204 */ 205static void ata_vlb_sync(ide_drive_t *drive, unsigned long port) 206{ 207 (void) HWIF(drive)->INB(port); 208 (void) HWIF(drive)->INB(port); 209 (void) HWIF(drive)->INB(port); 210} 211 212/* 213 * This is used for most PIO data transfers *from* the IDE interface 214 */ 215static void ata_input_data(ide_drive_t *drive, void *buffer, u32 wcount) 216{ 217 ide_hwif_t *hwif = HWIF(drive); 218 u8 io_32bit = drive->io_32bit; 219 220 if (io_32bit) { 221 if (io_32bit & 2) { 222 unsigned long flags; 223 local_irq_save(flags); 224 ata_vlb_sync(drive, IDE_NSECTOR_REG); 225 hwif->INSL(IDE_DATA_REG, buffer, wcount); 226 local_irq_restore(flags); 227 } else 228 hwif->INSL(IDE_DATA_REG, buffer, wcount); 229 } else { 230 hwif->INSW(IDE_DATA_REG, buffer, wcount<<1); 231 } 232} 233 234/* 235 * This is used for most PIO data transfers *to* the IDE interface 236 */ 237static void ata_output_data(ide_drive_t *drive, void *buffer, u32 wcount) 238{ 239 ide_hwif_t *hwif = HWIF(drive); 240 u8 io_32bit = drive->io_32bit; 241 242 if (io_32bit) { 243 if (io_32bit & 2) { 244 unsigned long flags; 245 local_irq_save(flags); 246 ata_vlb_sync(drive, IDE_NSECTOR_REG); 247 hwif->OUTSL(IDE_DATA_REG, buffer, wcount); 248 local_irq_restore(flags); 249 } else 250 hwif->OUTSL(IDE_DATA_REG, buffer, wcount); 251 } else { 252 hwif->OUTSW(IDE_DATA_REG, buffer, wcount<<1); 253 } 254} 255 256/* 257 * The following routines are mainly used by the ATAPI drivers. 258 * 259 * These routines will round up any request for an odd number of bytes, 260 * so if an odd bytecount is specified, be sure that there's at least one 261 * extra byte allocated for the buffer. 262 */ 263 264static void atapi_input_bytes(ide_drive_t *drive, void *buffer, u32 bytecount) 265{ 266 ide_hwif_t *hwif = HWIF(drive); 267 268 ++bytecount; 269#if defined(CONFIG_ATARI) || defined(CONFIG_Q40) 270 if (MACH_IS_ATARI || MACH_IS_Q40) { 271 /* Atari has a byte-swapped IDE interface */ 272 insw_swapw(IDE_DATA_REG, buffer, bytecount / 2); 273 return; 274 } 275#endif /* CONFIG_ATARI || CONFIG_Q40 */ 276 hwif->ata_input_data(drive, buffer, bytecount / 4); 277 if ((bytecount & 0x03) >= 2) 278 hwif->INSW(IDE_DATA_REG, ((u8 *)buffer)+(bytecount & ~0x03), 1); 279} 280 281static void atapi_output_bytes(ide_drive_t *drive, void *buffer, u32 bytecount) 282{ 283 ide_hwif_t *hwif = HWIF(drive); 284 285 ++bytecount; 286#if defined(CONFIG_ATARI) || defined(CONFIG_Q40) 287 if (MACH_IS_ATARI || MACH_IS_Q40) { 288 /* Atari has a byte-swapped IDE interface */ 289 outsw_swapw(IDE_DATA_REG, buffer, bytecount / 2); 290 return; 291 } 292#endif /* CONFIG_ATARI || CONFIG_Q40 */ 293 hwif->ata_output_data(drive, buffer, bytecount / 4); 294 if ((bytecount & 0x03) >= 2) 295 hwif->OUTSW(IDE_DATA_REG, ((u8*)buffer)+(bytecount & ~0x03), 1); 296} 297 298void default_hwif_transport(ide_hwif_t *hwif) 299{ 300 hwif->ata_input_data = ata_input_data; 301 hwif->ata_output_data = ata_output_data; 302 hwif->atapi_input_bytes = atapi_input_bytes; 303 hwif->atapi_output_bytes = atapi_output_bytes; 304} 305 306/* 307 * Beginning of Taskfile OPCODE Library and feature sets. 308 */ 309void ide_fix_driveid (struct hd_driveid *id) 310{ 311#ifndef __LITTLE_ENDIAN 312# ifdef __BIG_ENDIAN 313 int i; 314 u16 *stringcast; 315 316 id->config = __le16_to_cpu(id->config); 317 id->cyls = __le16_to_cpu(id->cyls); 318 id->reserved2 = __le16_to_cpu(id->reserved2); 319 id->heads = __le16_to_cpu(id->heads); 320 id->track_bytes = __le16_to_cpu(id->track_bytes); 321 id->sector_bytes = __le16_to_cpu(id->sector_bytes); 322 id->sectors = __le16_to_cpu(id->sectors); 323 id->vendor0 = __le16_to_cpu(id->vendor0); 324 id->vendor1 = __le16_to_cpu(id->vendor1); 325 id->vendor2 = __le16_to_cpu(id->vendor2); 326 stringcast = (u16 *)&id->serial_no[0]; 327 for (i = 0; i < (20/2); i++) 328 stringcast[i] = __le16_to_cpu(stringcast[i]); 329 id->buf_type = __le16_to_cpu(id->buf_type); 330 id->buf_size = __le16_to_cpu(id->buf_size); 331 id->ecc_bytes = __le16_to_cpu(id->ecc_bytes); 332 stringcast = (u16 *)&id->fw_rev[0]; 333 for (i = 0; i < (8/2); i++) 334 stringcast[i] = __le16_to_cpu(stringcast[i]); 335 stringcast = (u16 *)&id->model[0]; 336 for (i = 0; i < (40/2); i++) 337 stringcast[i] = __le16_to_cpu(stringcast[i]); 338 id->dword_io = __le16_to_cpu(id->dword_io); 339 id->reserved50 = __le16_to_cpu(id->reserved50); 340 id->field_valid = __le16_to_cpu(id->field_valid); 341 id->cur_cyls = __le16_to_cpu(id->cur_cyls); 342 id->cur_heads = __le16_to_cpu(id->cur_heads); 343 id->cur_sectors = __le16_to_cpu(id->cur_sectors); 344 id->cur_capacity0 = __le16_to_cpu(id->cur_capacity0); 345 id->cur_capacity1 = __le16_to_cpu(id->cur_capacity1); 346 id->lba_capacity = __le32_to_cpu(id->lba_capacity); 347 id->dma_1word = __le16_to_cpu(id->dma_1word); 348 id->dma_mword = __le16_to_cpu(id->dma_mword); 349 id->eide_pio_modes = __le16_to_cpu(id->eide_pio_modes); 350 id->eide_dma_min = __le16_to_cpu(id->eide_dma_min); 351 id->eide_dma_time = __le16_to_cpu(id->eide_dma_time); 352 id->eide_pio = __le16_to_cpu(id->eide_pio); 353 id->eide_pio_iordy = __le16_to_cpu(id->eide_pio_iordy); 354 for (i = 0; i < 2; ++i) 355 id->words69_70[i] = __le16_to_cpu(id->words69_70[i]); 356 for (i = 0; i < 4; ++i) 357 id->words71_74[i] = __le16_to_cpu(id->words71_74[i]); 358 id->queue_depth = __le16_to_cpu(id->queue_depth); 359 for (i = 0; i < 4; ++i) 360 id->words76_79[i] = __le16_to_cpu(id->words76_79[i]); 361 id->major_rev_num = __le16_to_cpu(id->major_rev_num); 362 id->minor_rev_num = __le16_to_cpu(id->minor_rev_num); 363 id->command_set_1 = __le16_to_cpu(id->command_set_1); 364 id->command_set_2 = __le16_to_cpu(id->command_set_2); 365 id->cfsse = __le16_to_cpu(id->cfsse); 366 id->cfs_enable_1 = __le16_to_cpu(id->cfs_enable_1); 367 id->cfs_enable_2 = __le16_to_cpu(id->cfs_enable_2); 368 id->csf_default = __le16_to_cpu(id->csf_default); 369 id->dma_ultra = __le16_to_cpu(id->dma_ultra); 370 id->trseuc = __le16_to_cpu(id->trseuc); 371 id->trsEuc = __le16_to_cpu(id->trsEuc); 372 id->CurAPMvalues = __le16_to_cpu(id->CurAPMvalues); 373 id->mprc = __le16_to_cpu(id->mprc); 374 id->hw_config = __le16_to_cpu(id->hw_config); 375 id->acoustic = __le16_to_cpu(id->acoustic); 376 id->msrqs = __le16_to_cpu(id->msrqs); 377 id->sxfert = __le16_to_cpu(id->sxfert); 378 id->sal = __le16_to_cpu(id->sal); 379 id->spg = __le32_to_cpu(id->spg); 380 id->lba_capacity_2 = __le64_to_cpu(id->lba_capacity_2); 381 for (i = 0; i < 22; i++) 382 id->words104_125[i] = __le16_to_cpu(id->words104_125[i]); 383 id->last_lun = __le16_to_cpu(id->last_lun); 384 id->word127 = __le16_to_cpu(id->word127); 385 id->dlf = __le16_to_cpu(id->dlf); 386 id->csfo = __le16_to_cpu(id->csfo); 387 for (i = 0; i < 26; i++) 388 id->words130_155[i] = __le16_to_cpu(id->words130_155[i]); 389 id->word156 = __le16_to_cpu(id->word156); 390 for (i = 0; i < 3; i++) 391 id->words157_159[i] = __le16_to_cpu(id->words157_159[i]); 392 id->cfa_power = __le16_to_cpu(id->cfa_power); 393 for (i = 0; i < 14; i++) 394 id->words161_175[i] = __le16_to_cpu(id->words161_175[i]); 395 for (i = 0; i < 31; i++) 396 id->words176_205[i] = __le16_to_cpu(id->words176_205[i]); 397 for (i = 0; i < 48; i++) 398 id->words206_254[i] = __le16_to_cpu(id->words206_254[i]); 399 id->integrity_word = __le16_to_cpu(id->integrity_word); 400# else 401# error "Please fix <asm/byteorder.h>" 402# endif 403#endif 404} 405 406/* FIXME: exported for use by the USB storage (isd200.c) code only */ 407EXPORT_SYMBOL(ide_fix_driveid); 408 409void ide_fixstring (u8 *s, const int bytecount, const int byteswap) 410{ 411 u8 *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */ 412 413 if (byteswap) { 414 /* convert from big-endian to host byte order */ 415 for (p = end ; p != s;) { 416 unsigned short *pp = (unsigned short *) (p -= 2); 417 *pp = ntohs(*pp); 418 } 419 } 420 /* strip leading blanks */ 421 while (s != end && *s == ' ') 422 ++s; 423 /* compress internal blanks and strip trailing blanks */ 424 while (s != end && *s) { 425 if (*s++ != ' ' || (s != end && *s && *s != ' ')) 426 *p++ = *(s-1); 427 } 428 /* wipe out trailing garbage */ 429 while (p != end) 430 *p++ = '\0'; 431} 432 433EXPORT_SYMBOL(ide_fixstring); 434 435/* 436 * Needed for PCI irq sharing 437 */ 438int drive_is_ready (ide_drive_t *drive) 439{ 440 ide_hwif_t *hwif = HWIF(drive); 441 u8 stat = 0; 442 443 if (drive->waiting_for_dma) 444 return hwif->ide_dma_test_irq(drive); 445 446#if 0 447 /* need to guarantee 400ns since last command was issued */ 448 udelay(1); 449#endif 450 451#ifdef CONFIG_IDEPCI_SHARE_IRQ 452 /* 453 * We do a passive status test under shared PCI interrupts on 454 * cards that truly share the ATA side interrupt, but may also share 455 * an interrupt with another pci card/device. We make no assumptions 456 * about possible isa-pnp and pci-pnp issues yet. 457 */ 458 if (IDE_CONTROL_REG) 459 stat = hwif->INB(IDE_ALTSTATUS_REG); 460 else 461#endif /* CONFIG_IDEPCI_SHARE_IRQ */ 462 /* Note: this may clear a pending IRQ!! */ 463 stat = hwif->INB(IDE_STATUS_REG); 464 465 if (stat & BUSY_STAT) 466 /* drive busy: definitely not interrupting */ 467 return 0; 468 469 /* drive ready: *might* be interrupting */ 470 return 1; 471} 472 473EXPORT_SYMBOL(drive_is_ready); 474 475/* 476 * Global for All, and taken from ide-pmac.c. Can be called 477 * with spinlock held & IRQs disabled, so don't schedule ! 478 */ 479int wait_for_ready (ide_drive_t *drive, int timeout) 480{ 481 ide_hwif_t *hwif = HWIF(drive); 482 u8 stat = 0; 483 484 while(--timeout) { 485 stat = hwif->INB(IDE_STATUS_REG); 486 if (!(stat & BUSY_STAT)) { 487 if (drive->ready_stat == 0) 488 break; 489 else if ((stat & drive->ready_stat)||(stat & ERR_STAT)) 490 break; 491 } 492 mdelay(1); 493 } 494 if ((stat & ERR_STAT) || timeout <= 0) { 495 if (stat & ERR_STAT) { 496 printk(KERN_ERR "%s: wait_for_ready, " 497 "error status: %x\n", drive->name, stat); 498 } 499 return 1; 500 } 501 return 0; 502} 503 504/* 505 * This routine busy-waits for the drive status to be not "busy". 506 * It then checks the status for all of the "good" bits and none 507 * of the "bad" bits, and if all is okay it returns 0. All other 508 * cases return 1 after invoking ide_error() -- caller should just return. 509 * 510 * This routine should get fixed to not hog the cpu during extra long waits.. 511 * That could be done by busy-waiting for the first jiffy or two, and then 512 * setting a timer to wake up at half second intervals thereafter, 513 * until timeout is achieved, before timing out. 514 */ 515int ide_wait_stat (ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout) 516{ 517 ide_hwif_t *hwif = HWIF(drive); 518 u8 stat; 519 int i; 520 unsigned long flags; 521 522 /* bail early if we've exceeded max_failures */ 523 if (drive->max_failures && (drive->failures > drive->max_failures)) { 524 *startstop = ide_stopped; 525 return 1; 526 } 527 528 udelay(1); /* spec allows drive 400ns to assert "BUSY" */ 529 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) { 530 local_irq_set(flags); 531 timeout += jiffies; 532 while ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) { 533 if (time_after(jiffies, timeout)) { 534 /* 535 * One last read after the timeout in case 536 * heavy interrupt load made us not make any 537 * progress during the timeout.. 538 */ 539 stat = hwif->INB(IDE_STATUS_REG); 540 if (!(stat & BUSY_STAT)) 541 break; 542 543 local_irq_restore(flags); 544 *startstop = ide_error(drive, "status timeout", stat); 545 return 1; 546 } 547 } 548 local_irq_restore(flags); 549 } 550 /* 551 * Allow status to settle, then read it again. 552 * A few rare drives vastly violate the 400ns spec here, 553 * so we'll wait up to 10usec for a "good" status 554 * rather than expensively fail things immediately. 555 * This fix courtesy of Matthew Faupel & Niccolo Rigacci. 556 */ 557 for (i = 0; i < 10; i++) { 558 udelay(1); 559 if (OK_STAT((stat = hwif->INB(IDE_STATUS_REG)), good, bad)) 560 return 0; 561 } 562 *startstop = ide_error(drive, "status error", stat); 563 return 1; 564} 565 566EXPORT_SYMBOL(ide_wait_stat); 567 568/* 569 * All hosts that use the 80c ribbon must use! 570 * The name is derived from upper byte of word 93 and the 80c ribbon. 571 */ 572u8 eighty_ninty_three (ide_drive_t *drive) 573{ 574 if(HWIF(drive)->udma_four == 0) 575 return 0; 576 577 /* Check for SATA but only if we are ATA5 or higher */ 578 if (drive->id->hw_config == 0 && (drive->id->major_rev_num & 0x7FE0)) 579 return 1; 580 if (!(drive->id->hw_config & 0x6000)) 581 return 0; 582#ifndef CONFIG_IDEDMA_IVB 583 if(!(drive->id->hw_config & 0x4000)) 584 return 0; 585#endif /* CONFIG_IDEDMA_IVB */ 586 return 1; 587} 588 589EXPORT_SYMBOL(eighty_ninty_three); 590 591int ide_ata66_check (ide_drive_t *drive, ide_task_t *args) 592{ 593 if ((args->tfRegister[IDE_COMMAND_OFFSET] == WIN_SETFEATURES) && 594 (args->tfRegister[IDE_SECTOR_OFFSET] > XFER_UDMA_2) && 595 (args->tfRegister[IDE_FEATURE_OFFSET] == SETFEATURES_XFER)) { 596#ifndef CONFIG_IDEDMA_IVB 597 if ((drive->id->hw_config & 0x6000) == 0) { 598#else /* !CONFIG_IDEDMA_IVB */ 599 if (((drive->id->hw_config & 0x2000) == 0) || 600 ((drive->id->hw_config & 0x4000) == 0)) { 601#endif /* CONFIG_IDEDMA_IVB */ 602 printk("%s: Speed warnings UDMA 3/4/5 is not " 603 "functional.\n", drive->name); 604 return 1; 605 } 606 if (!HWIF(drive)->udma_four) { 607 printk("%s: Speed warnings UDMA 3/4/5 is not " 608 "functional.\n", 609 HWIF(drive)->name); 610 return 1; 611 } 612 } 613 return 0; 614} 615 616/* 617 * Backside of HDIO_DRIVE_CMD call of SETFEATURES_XFER. 618 * 1 : Safe to update drive->id DMA registers. 619 * 0 : OOPs not allowed. 620 */ 621int set_transfer (ide_drive_t *drive, ide_task_t *args) 622{ 623 if ((args->tfRegister[IDE_COMMAND_OFFSET] == WIN_SETFEATURES) && 624 (args->tfRegister[IDE_SECTOR_OFFSET] >= XFER_SW_DMA_0) && 625 (args->tfRegister[IDE_FEATURE_OFFSET] == SETFEATURES_XFER) && 626 (drive->id->dma_ultra || 627 drive->id->dma_mword || 628 drive->id->dma_1word)) 629 return 1; 630 631 return 0; 632} 633 634#ifdef CONFIG_BLK_DEV_IDEDMA 635static u8 ide_auto_reduce_xfer (ide_drive_t *drive) 636{ 637 if (!drive->crc_count) 638 return drive->current_speed; 639 drive->crc_count = 0; 640 641 switch(drive->current_speed) { 642 case XFER_UDMA_7: return XFER_UDMA_6; 643 case XFER_UDMA_6: return XFER_UDMA_5; 644 case XFER_UDMA_5: return XFER_UDMA_4; 645 case XFER_UDMA_4: return XFER_UDMA_3; 646 case XFER_UDMA_3: return XFER_UDMA_2; 647 case XFER_UDMA_2: return XFER_UDMA_1; 648 case XFER_UDMA_1: return XFER_UDMA_0; 649 /* 650 * OOPS we do not goto non Ultra DMA modes 651 * without iCRC's available we force 652 * the system to PIO and make the user 653 * invoke the ATA-1 ATA-2 DMA modes. 654 */ 655 case XFER_UDMA_0: 656 default: return XFER_PIO_4; 657 } 658} 659#endif /* CONFIG_BLK_DEV_IDEDMA */ 660 661/* 662 * Update the 663 */ 664int ide_driveid_update (ide_drive_t *drive) 665{ 666 ide_hwif_t *hwif = HWIF(drive); 667 struct hd_driveid *id; 668#if 0 669 id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC); 670 if (!id) 671 return 0; 672 673 taskfile_lib_get_identify(drive, (char *)&id); 674 675 ide_fix_driveid(id); 676 if (id) { 677 drive->id->dma_ultra = id->dma_ultra; 678 drive->id->dma_mword = id->dma_mword; 679 drive->id->dma_1word = id->dma_1word; 680 /* anything more ? */ 681 kfree(id); 682 } 683 return 1; 684#else 685 /* 686 * Re-read drive->id for possible DMA mode 687 * change (copied from ide-probe.c) 688 */ 689 unsigned long timeout, flags; 690 691 SELECT_MASK(drive, 1); 692 if (IDE_CONTROL_REG) 693 hwif->OUTB(drive->ctl,IDE_CONTROL_REG); 694 msleep(50); 695 hwif->OUTB(WIN_IDENTIFY, IDE_COMMAND_REG); 696 timeout = jiffies + WAIT_WORSTCASE; 697 do { 698 if (time_after(jiffies, timeout)) { 699 SELECT_MASK(drive, 0); 700 return 0; /* drive timed-out */ 701 } 702 msleep(50); /* give drive a breather */ 703 } while (hwif->INB(IDE_ALTSTATUS_REG) & BUSY_STAT); 704 msleep(50); /* wait for IRQ and DRQ_STAT */ 705 if (!OK_STAT(hwif->INB(IDE_STATUS_REG),DRQ_STAT,BAD_R_STAT)) { 706 SELECT_MASK(drive, 0); 707 printk("%s: CHECK for good STATUS\n", drive->name); 708 return 0; 709 } 710 local_irq_save(flags); 711 SELECT_MASK(drive, 0); 712 id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC); 713 if (!id) { 714 local_irq_restore(flags); 715 return 0; 716 } 717 ata_input_data(drive, id, SECTOR_WORDS); 718 (void) hwif->INB(IDE_STATUS_REG); /* clear drive IRQ */ 719 local_irq_enable(); 720 local_irq_restore(flags); 721 ide_fix_driveid(id); 722 if (id) { 723 drive->id->dma_ultra = id->dma_ultra; 724 drive->id->dma_mword = id->dma_mword; 725 drive->id->dma_1word = id->dma_1word; 726 /* anything more ? */ 727 kfree(id); 728 } 729 730 return 1; 731#endif 732} 733 734/* 735 * Similar to ide_wait_stat(), except it never calls ide_error internally. 736 * This is a kludge to handle the new ide_config_drive_speed() function, 737 * and should not otherwise be used anywhere. Eventually, the tuneproc's 738 * should be updated to return ide_startstop_t, in which case we can get 739 * rid of this abomination again. :) -ml 740 * 741 * It is gone.......... 742 * 743 * const char *msg == consider adding for verbose errors. 744 */ 745int ide_config_drive_speed (ide_drive_t *drive, u8 speed) 746{ 747 ide_hwif_t *hwif = HWIF(drive); 748 int i, error = 1; 749 u8 stat; 750 751// while (HWGROUP(drive)->busy) 752// msleep(50); 753 754#ifdef CONFIG_BLK_DEV_IDEDMA 755 if (hwif->ide_dma_check) /* check if host supports DMA */ 756 hwif->dma_host_off(drive); 757#endif 758 759 /* 760 * Don't use ide_wait_cmd here - it will 761 * attempt to set_geometry and recalibrate, 762 * but for some reason these don't work at 763 * this point (lost interrupt). 764 */ 765 /* 766 * Select the drive, and issue the SETFEATURES command 767 */ 768 disable_irq_nosync(hwif->irq); 769 770 /* 771 * FIXME: we race against the running IRQ here if 772 * this is called from non IRQ context. If we use 773 * disable_irq() we hang on the error path. Work 774 * is needed. 775 */ 776 777 udelay(1); 778 SELECT_DRIVE(drive); 779 SELECT_MASK(drive, 0); 780 udelay(1); 781 if (IDE_CONTROL_REG) 782 hwif->OUTB(drive->ctl | 2, IDE_CONTROL_REG); 783 hwif->OUTB(speed, IDE_NSECTOR_REG); 784 hwif->OUTB(SETFEATURES_XFER, IDE_FEATURE_REG); 785 hwif->OUTB(WIN_SETFEATURES, IDE_COMMAND_REG); 786 if ((IDE_CONTROL_REG) && (drive->quirk_list == 2)) 787 hwif->OUTB(drive->ctl, IDE_CONTROL_REG); 788 udelay(1); 789 /* 790 * Wait for drive to become non-BUSY 791 */ 792 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) { 793 unsigned long flags, timeout; 794 local_irq_set(flags); 795 timeout = jiffies + WAIT_CMD; 796 while ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) { 797 if (time_after(jiffies, timeout)) 798 break; 799 } 800 local_irq_restore(flags); 801 } 802 803 /* 804 * Allow status to settle, then read it again. 805 * A few rare drives vastly violate the 400ns spec here, 806 * so we'll wait up to 10usec for a "good" status 807 * rather than expensively fail things immediately. 808 * This fix courtesy of Matthew Faupel & Niccolo Rigacci. 809 */ 810 for (i = 0; i < 10; i++) { 811 udelay(1); 812 if (OK_STAT((stat = hwif->INB(IDE_STATUS_REG)), DRIVE_READY, BUSY_STAT|DRQ_STAT|ERR_STAT)) { 813 error = 0; 814 break; 815 } 816 } 817 818 SELECT_MASK(drive, 0); 819 820 enable_irq(hwif->irq); 821 822 if (error) { 823 (void) ide_dump_status(drive, "set_drive_speed_status", stat); 824 return error; 825 } 826 827 drive->id->dma_ultra &= ~0xFF00; 828 drive->id->dma_mword &= ~0x0F00; 829 drive->id->dma_1word &= ~0x0F00; 830 831#ifdef CONFIG_BLK_DEV_IDEDMA 832 if (speed >= XFER_SW_DMA_0) 833 hwif->ide_dma_host_on(drive); 834 else if (hwif->ide_dma_check) /* check if host supports DMA */ 835 hwif->dma_off_quietly(drive); 836#endif 837 838 switch(speed) { 839 case XFER_UDMA_7: drive->id->dma_ultra |= 0x8080; break; 840 case XFER_UDMA_6: drive->id->dma_ultra |= 0x4040; break; 841 case XFER_UDMA_5: drive->id->dma_ultra |= 0x2020; break; 842 case XFER_UDMA_4: drive->id->dma_ultra |= 0x1010; break; 843 case XFER_UDMA_3: drive->id->dma_ultra |= 0x0808; break; 844 case XFER_UDMA_2: drive->id->dma_ultra |= 0x0404; break; 845 case XFER_UDMA_1: drive->id->dma_ultra |= 0x0202; break; 846 case XFER_UDMA_0: drive->id->dma_ultra |= 0x0101; break; 847 case XFER_MW_DMA_2: drive->id->dma_mword |= 0x0404; break; 848 case XFER_MW_DMA_1: drive->id->dma_mword |= 0x0202; break; 849 case XFER_MW_DMA_0: drive->id->dma_mword |= 0x0101; break; 850 case XFER_SW_DMA_2: drive->id->dma_1word |= 0x0404; break; 851 case XFER_SW_DMA_1: drive->id->dma_1word |= 0x0202; break; 852 case XFER_SW_DMA_0: drive->id->dma_1word |= 0x0101; break; 853 default: break; 854 } 855 if (!drive->init_speed) 856 drive->init_speed = speed; 857 drive->current_speed = speed; 858 return error; 859} 860 861EXPORT_SYMBOL(ide_config_drive_speed); 862 863 864/* 865 * This should get invoked any time we exit the driver to 866 * wait for an interrupt response from a drive. handler() points 867 * at the appropriate code to handle the next interrupt, and a 868 * timer is started to prevent us from waiting forever in case 869 * something goes wrong (see the ide_timer_expiry() handler later on). 870 * 871 * See also ide_execute_command 872 */ 873static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, 874 unsigned int timeout, ide_expiry_t *expiry) 875{ 876 ide_hwgroup_t *hwgroup = HWGROUP(drive); 877 878 if (hwgroup->handler != NULL) { 879 printk(KERN_CRIT "%s: ide_set_handler: handler not null; " 880 "old=%p, new=%p\n", 881 drive->name, hwgroup->handler, handler); 882 } 883 hwgroup->handler = handler; 884 hwgroup->expiry = expiry; 885 hwgroup->timer.expires = jiffies + timeout; 886 add_timer(&hwgroup->timer); 887} 888 889void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, 890 unsigned int timeout, ide_expiry_t *expiry) 891{ 892 unsigned long flags; 893 spin_lock_irqsave(&ide_lock, flags); 894 __ide_set_handler(drive, handler, timeout, expiry); 895 spin_unlock_irqrestore(&ide_lock, flags); 896} 897 898EXPORT_SYMBOL(ide_set_handler); 899 900/** 901 * ide_execute_command - execute an IDE command 902 * @drive: IDE drive to issue the command against 903 * @command: command byte to write 904 * @handler: handler for next phase 905 * @timeout: timeout for command 906 * @expiry: handler to run on timeout 907 * 908 * Helper function to issue an IDE command. This handles the 909 * atomicity requirements, command timing and ensures that the 910 * handler and IRQ setup do not race. All IDE command kick off 911 * should go via this function or do equivalent locking. 912 */ 913 914void ide_execute_command(ide_drive_t *drive, task_ioreg_t cmd, ide_handler_t *handler, unsigned timeout, ide_expiry_t *expiry) 915{ 916 unsigned long flags; 917 ide_hwgroup_t *hwgroup = HWGROUP(drive); 918 ide_hwif_t *hwif = HWIF(drive); 919 920 spin_lock_irqsave(&ide_lock, flags); 921 922 BUG_ON(hwgroup->handler); 923 hwgroup->handler = handler; 924 hwgroup->expiry = expiry; 925 hwgroup->timer.expires = jiffies + timeout; 926 add_timer(&hwgroup->timer); 927 hwif->OUTBSYNC(drive, cmd, IDE_COMMAND_REG); 928 /* Drive takes 400nS to respond, we must avoid the IRQ being 929 serviced before that. 930 931 FIXME: we could skip this delay with care on non shared 932 devices 933 */ 934 ndelay(400); 935 spin_unlock_irqrestore(&ide_lock, flags); 936} 937 938EXPORT_SYMBOL(ide_execute_command); 939 940 941/* needed below */ 942static ide_startstop_t do_reset1 (ide_drive_t *, int); 943 944/* 945 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms 946 * during an atapi drive reset operation. If the drive has not yet responded, 947 * and we have not yet hit our maximum waiting time, then the timer is restarted 948 * for another 50ms. 949 */ 950static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive) 951{ 952 ide_hwgroup_t *hwgroup = HWGROUP(drive); 953 ide_hwif_t *hwif = HWIF(drive); 954 u8 stat; 955 956 SELECT_DRIVE(drive); 957 udelay (10); 958 959 if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG), 0, BUSY_STAT)) { 960 printk("%s: ATAPI reset complete\n", drive->name); 961 } else { 962 if (time_before(jiffies, hwgroup->poll_timeout)) { 963 BUG_ON(HWGROUP(drive)->handler != NULL); 964 ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); 965 /* continue polling */ 966 return ide_started; 967 } 968 /* end of polling */ 969 hwgroup->polling = 0; 970 printk("%s: ATAPI reset timed-out, status=0x%02x\n", 971 drive->name, stat); 972 /* do it the old fashioned way */ 973 return do_reset1(drive, 1); 974 } 975 /* done polling */ 976 hwgroup->polling = 0; 977 hwgroup->resetting = 0; 978 return ide_stopped; 979} 980 981/* 982 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms 983 * during an ide reset operation. If the drives have not yet responded, 984 * and we have not yet hit our maximum waiting time, then the timer is restarted 985 * for another 50ms. 986 */ 987static ide_startstop_t reset_pollfunc (ide_drive_t *drive) 988{ 989 ide_hwgroup_t *hwgroup = HWGROUP(drive); 990 ide_hwif_t *hwif = HWIF(drive); 991 u8 tmp; 992 993 if (hwif->reset_poll != NULL) { 994 if (hwif->reset_poll(drive)) { 995 printk(KERN_ERR "%s: host reset_poll failure for %s.\n", 996 hwif->name, drive->name); 997 return ide_stopped; 998 } 999 } 1000 1001 if (!OK_STAT(tmp = hwif->INB(IDE_STATUS_REG), 0, BUSY_STAT)) { 1002 if (time_before(jiffies, hwgroup->poll_timeout)) { 1003 BUG_ON(HWGROUP(drive)->handler != NULL); 1004 ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); 1005 /* continue polling */ 1006 return ide_started; 1007 } 1008 printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp); 1009 drive->failures++; 1010 } else { 1011 printk("%s: reset: ", hwif->name); 1012 if ((tmp = hwif->INB(IDE_ERROR_REG)) == 1) { 1013 printk("success\n"); 1014 drive->failures = 0; 1015 } else { 1016 drive->failures++; 1017 printk("master: "); 1018 switch (tmp & 0x7f) { 1019 case 1: printk("passed"); 1020 break; 1021 case 2: printk("formatter device error"); 1022 break; 1023 case 3: printk("sector buffer error"); 1024 break; 1025 case 4: printk("ECC circuitry error"); 1026 break; 1027 case 5: printk("controlling MPU error"); 1028 break; 1029 default:printk("error (0x%02x?)", tmp); 1030 } 1031 if (tmp & 0x80) 1032 printk("; slave: failed"); 1033 printk("\n"); 1034 } 1035 } 1036 hwgroup->polling = 0; /* done polling */ 1037 hwgroup->resetting = 0; /* done reset attempt */ 1038 return ide_stopped; 1039} 1040 1041static void check_dma_crc(ide_drive_t *drive) 1042{ 1043#ifdef CONFIG_BLK_DEV_IDEDMA 1044 if (drive->crc_count) { 1045 drive->hwif->dma_off_quietly(drive); 1046 ide_set_xfer_rate(drive, ide_auto_reduce_xfer(drive)); 1047 if (drive->current_speed >= XFER_SW_DMA_0) 1048 (void) HWIF(drive)->ide_dma_on(drive); 1049 } else 1050 ide_dma_off(drive); 1051#endif 1052} 1053 1054static void ide_disk_pre_reset(ide_drive_t *drive) 1055{ 1056 int legacy = (drive->id->cfs_enable_2 & 0x0400) ? 0 : 1; 1057 1058 drive->special.all = 0; 1059 drive->special.b.set_geometry = legacy; 1060 drive->special.b.recalibrate = legacy; 1061 if (OK_TO_RESET_CONTROLLER) 1062 drive->mult_count = 0; 1063 if (!drive->keep_settings && !drive->using_dma) 1064 drive->mult_req = 0; 1065 if (drive->mult_req != drive->mult_count) 1066 drive->special.b.set_multmode = 1; 1067} 1068 1069static void pre_reset(ide_drive_t *drive) 1070{ 1071 if (drive->media == ide_disk) 1072 ide_disk_pre_reset(drive); 1073 else 1074 drive->post_reset = 1; 1075 1076 if (!drive->keep_settings) { 1077 if (drive->using_dma) { 1078 check_dma_crc(drive); 1079 } else { 1080 drive->unmask = 0; 1081 drive->io_32bit = 0; 1082 } 1083 return; 1084 } 1085 if (drive->using_dma) 1086 check_dma_crc(drive); 1087 1088 if (HWIF(drive)->pre_reset != NULL) 1089 HWIF(drive)->pre_reset(drive); 1090 1091} 1092 1093/* 1094 * do_reset1() attempts to recover a confused drive by resetting it. 1095 * Unfortunately, resetting a disk drive actually resets all devices on 1096 * the same interface, so it can really be thought of as resetting the 1097 * interface rather than resetting the drive. 1098 * 1099 * ATAPI devices have their own reset mechanism which allows them to be 1100 * individually reset without clobbering other devices on the same interface. 1101 * 1102 * Unfortunately, the IDE interface does not generate an interrupt to let 1103 * us know when the reset operation has finished, so we must poll for this. 1104 * Equally poor, though, is the fact that this may a very long time to complete, 1105 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it, 1106 * we set a timer to poll at 50ms intervals. 1107 */ 1108static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi) 1109{ 1110 unsigned int unit; 1111 unsigned long flags; 1112 ide_hwif_t *hwif; 1113 ide_hwgroup_t *hwgroup; 1114 1115 spin_lock_irqsave(&ide_lock, flags); 1116 hwif = HWIF(drive); 1117 hwgroup = HWGROUP(drive); 1118 1119 /* We must not reset with running handlers */ 1120 BUG_ON(hwgroup->handler != NULL); 1121 1122 /* For an ATAPI device, first try an ATAPI SRST. */ 1123 if (drive->media != ide_disk && !do_not_try_atapi) { 1124 hwgroup->resetting = 1; 1125 pre_reset(drive); 1126 SELECT_DRIVE(drive); 1127 udelay (20); 1128 hwif->OUTBSYNC(drive, WIN_SRST, IDE_COMMAND_REG); 1129 ndelay(400); 1130 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; 1131 hwgroup->polling = 1; 1132 __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); 1133 spin_unlock_irqrestore(&ide_lock, flags); 1134 return ide_started; 1135 } 1136 1137 /* 1138 * First, reset any device state data we were maintaining 1139 * for any of the drives on this interface. 1140 */ 1141 for (unit = 0; unit < MAX_DRIVES; ++unit) 1142 pre_reset(&hwif->drives[unit]); 1143 1144#if OK_TO_RESET_CONTROLLER 1145 if (!IDE_CONTROL_REG) { 1146 spin_unlock_irqrestore(&ide_lock, flags); 1147 return ide_stopped; 1148 } 1149 1150 hwgroup->resetting = 1; 1151 /* 1152 * Note that we also set nIEN while resetting the device, 1153 * to mask unwanted interrupts from the interface during the reset. 1154 * However, due to the design of PC hardware, this will cause an 1155 * immediate interrupt due to the edge transition it produces. 1156 * This single interrupt gives us a "fast poll" for drives that 1157 * recover from reset very quickly, saving us the first 50ms wait time. 1158 */ 1159 /* set SRST and nIEN */ 1160 hwif->OUTBSYNC(drive, drive->ctl|6,IDE_CONTROL_REG); 1161 /* more than enough time */ 1162 udelay(10); 1163 if (drive->quirk_list == 2) { 1164 /* clear SRST and nIEN */ 1165 hwif->OUTBSYNC(drive, drive->ctl, IDE_CONTROL_REG); 1166 } else { 1167 /* clear SRST, leave nIEN */ 1168 hwif->OUTBSYNC(drive, drive->ctl|2, IDE_CONTROL_REG); 1169 } 1170 /* more than enough time */ 1171 udelay(10); 1172 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; 1173 hwgroup->polling = 1; 1174 __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); 1175 1176 /* 1177 * Some weird controller like resetting themselves to a strange 1178 * state when the disks are reset this way. At least, the Winbond 1179 * 553 documentation says that 1180 */ 1181 if (hwif->resetproc != NULL) { 1182 hwif->resetproc(drive); 1183 } 1184 1185#endif /* OK_TO_RESET_CONTROLLER */ 1186 1187 spin_unlock_irqrestore(&ide_lock, flags); 1188 return ide_started; 1189} 1190 1191/* 1192 * ide_do_reset() is the entry point to the drive/interface reset code. 1193 */ 1194 1195ide_startstop_t ide_do_reset (ide_drive_t *drive) 1196{ 1197 return do_reset1(drive, 0); 1198} 1199 1200EXPORT_SYMBOL(ide_do_reset); 1201 1202/* 1203 * ide_wait_not_busy() waits for the currently selected device on the hwif 1204 * to report a non-busy status, see comments in probe_hwif(). 1205 */ 1206int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) 1207{ 1208 u8 stat = 0; 1209 1210 while(timeout--) { 1211 /* 1212 * Turn this into a schedule() sleep once I'm sure 1213 * about locking issues (2.5 work ?). 1214 */ 1215 mdelay(1); 1216 stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]); 1217 if ((stat & BUSY_STAT) == 0) 1218 return 0; 1219 /* 1220 * Assume a value of 0xff means nothing is connected to 1221 * the interface and it doesn't implement the pull-down 1222 * resistor on D7. 1223 */ 1224 if (stat == 0xff) 1225 return -ENODEV; 1226 touch_softlockup_watchdog(); 1227 touch_nmi_watchdog(); 1228 } 1229 return -EBUSY; 1230} 1231 1232EXPORT_SYMBOL_GPL(ide_wait_not_busy); 1233 1234