Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Michal Schmidt | 1e86240 | 2006-07-30 03:03:29 -0700 | [diff] [blame] | 26 | #include <linux/nmi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 37 | static u8 ide_inb (unsigned long port) |
| 38 | { |
| 39 | return (u8) inb(port); |
| 40 | } |
| 41 | |
| 42 | static u16 ide_inw (unsigned long port) |
| 43 | { |
| 44 | return (u16) inw(port); |
| 45 | } |
| 46 | |
| 47 | static void ide_insw (unsigned long port, void *addr, u32 count) |
| 48 | { |
| 49 | insw(port, addr, count); |
| 50 | } |
| 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | static void ide_insl (unsigned long port, void *addr, u32 count) |
| 53 | { |
| 54 | insl(port, addr, count); |
| 55 | } |
| 56 | |
| 57 | static void ide_outb (u8 val, unsigned long port) |
| 58 | { |
| 59 | outb(val, port); |
| 60 | } |
| 61 | |
| 62 | static void ide_outbsync (ide_drive_t *drive, u8 addr, unsigned long port) |
| 63 | { |
| 64 | outb(addr, port); |
| 65 | } |
| 66 | |
| 67 | static void ide_outw (u16 val, unsigned long port) |
| 68 | { |
| 69 | outw(val, port); |
| 70 | } |
| 71 | |
| 72 | static void ide_outsw (unsigned long port, void *addr, u32 count) |
| 73 | { |
| 74 | outsw(port, addr, count); |
| 75 | } |
| 76 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | static void ide_outsl (unsigned long port, void *addr, u32 count) |
| 78 | { |
| 79 | outsl(port, addr, count); |
| 80 | } |
| 81 | |
| 82 | void default_hwif_iops (ide_hwif_t *hwif) |
| 83 | { |
| 84 | hwif->OUTB = ide_outb; |
| 85 | hwif->OUTBSYNC = ide_outbsync; |
| 86 | hwif->OUTW = ide_outw; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | hwif->OUTSW = ide_outsw; |
| 88 | hwif->OUTSL = ide_outsl; |
| 89 | hwif->INB = ide_inb; |
| 90 | hwif->INW = ide_inw; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | hwif->INSW = ide_insw; |
| 92 | hwif->INSL = ide_insl; |
| 93 | } |
| 94 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | /* |
| 96 | * MMIO operations, typically used for SATA controllers |
| 97 | */ |
| 98 | |
| 99 | static u8 ide_mm_inb (unsigned long port) |
| 100 | { |
| 101 | return (u8) readb((void __iomem *) port); |
| 102 | } |
| 103 | |
| 104 | static u16 ide_mm_inw (unsigned long port) |
| 105 | { |
| 106 | return (u16) readw((void __iomem *) port); |
| 107 | } |
| 108 | |
| 109 | static void ide_mm_insw (unsigned long port, void *addr, u32 count) |
| 110 | { |
| 111 | __ide_mm_insw((void __iomem *) port, addr, count); |
| 112 | } |
| 113 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | static void ide_mm_insl (unsigned long port, void *addr, u32 count) |
| 115 | { |
| 116 | __ide_mm_insl((void __iomem *) port, addr, count); |
| 117 | } |
| 118 | |
| 119 | static void ide_mm_outb (u8 value, unsigned long port) |
| 120 | { |
| 121 | writeb(value, (void __iomem *) port); |
| 122 | } |
| 123 | |
| 124 | static void ide_mm_outbsync (ide_drive_t *drive, u8 value, unsigned long port) |
| 125 | { |
| 126 | writeb(value, (void __iomem *) port); |
| 127 | } |
| 128 | |
| 129 | static void ide_mm_outw (u16 value, unsigned long port) |
| 130 | { |
| 131 | writew(value, (void __iomem *) port); |
| 132 | } |
| 133 | |
| 134 | static void ide_mm_outsw (unsigned long port, void *addr, u32 count) |
| 135 | { |
| 136 | __ide_mm_outsw((void __iomem *) port, addr, count); |
| 137 | } |
| 138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | static void ide_mm_outsl (unsigned long port, void *addr, u32 count) |
| 140 | { |
| 141 | __ide_mm_outsl((void __iomem *) port, addr, count); |
| 142 | } |
| 143 | |
| 144 | void 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | hwif->OUTSW = ide_mm_outsw; |
| 152 | hwif->OUTSL = ide_mm_outsl; |
| 153 | hwif->INB = ide_mm_inb; |
| 154 | hwif->INW = ide_mm_inw; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | hwif->INSW = ide_mm_insw; |
| 156 | hwif->INSL = ide_mm_insl; |
| 157 | } |
| 158 | |
| 159 | EXPORT_SYMBOL(default_hwif_mmiops); |
| 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | void SELECT_DRIVE (ide_drive_t *drive) |
| 162 | { |
| 163 | if (HWIF(drive)->selectproc) |
| 164 | HWIF(drive)->selectproc(drive); |
| 165 | HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG); |
| 166 | } |
| 167 | |
| 168 | EXPORT_SYMBOL(SELECT_DRIVE); |
| 169 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | void SELECT_MASK (ide_drive_t *drive, int mask) |
| 171 | { |
| 172 | if (HWIF(drive)->maskproc) |
| 173 | HWIF(drive)->maskproc(drive, mask); |
| 174 | } |
| 175 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | /* |
| 177 | * Some localbus EIDE interfaces require a special access sequence |
| 178 | * when using 32-bit I/O instructions to transfer data. We call this |
| 179 | * the "vlb_sync" sequence, which consists of three successive reads |
| 180 | * of the sector count register location, with interrupts disabled |
| 181 | * to ensure that the reads all happen together. |
| 182 | */ |
| 183 | static void ata_vlb_sync(ide_drive_t *drive, unsigned long port) |
| 184 | { |
| 185 | (void) HWIF(drive)->INB(port); |
| 186 | (void) HWIF(drive)->INB(port); |
| 187 | (void) HWIF(drive)->INB(port); |
| 188 | } |
| 189 | |
| 190 | /* |
| 191 | * This is used for most PIO data transfers *from* the IDE interface |
| 192 | */ |
| 193 | static void ata_input_data(ide_drive_t *drive, void *buffer, u32 wcount) |
| 194 | { |
| 195 | ide_hwif_t *hwif = HWIF(drive); |
| 196 | u8 io_32bit = drive->io_32bit; |
| 197 | |
| 198 | if (io_32bit) { |
| 199 | if (io_32bit & 2) { |
| 200 | unsigned long flags; |
| 201 | local_irq_save(flags); |
| 202 | ata_vlb_sync(drive, IDE_NSECTOR_REG); |
| 203 | hwif->INSL(IDE_DATA_REG, buffer, wcount); |
| 204 | local_irq_restore(flags); |
| 205 | } else |
| 206 | hwif->INSL(IDE_DATA_REG, buffer, wcount); |
| 207 | } else { |
| 208 | hwif->INSW(IDE_DATA_REG, buffer, wcount<<1); |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | /* |
| 213 | * This is used for most PIO data transfers *to* the IDE interface |
| 214 | */ |
| 215 | static void ata_output_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->OUTSL(IDE_DATA_REG, buffer, wcount); |
| 226 | local_irq_restore(flags); |
| 227 | } else |
| 228 | hwif->OUTSL(IDE_DATA_REG, buffer, wcount); |
| 229 | } else { |
| 230 | hwif->OUTSW(IDE_DATA_REG, buffer, wcount<<1); |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | /* |
| 235 | * The following routines are mainly used by the ATAPI drivers. |
| 236 | * |
| 237 | * These routines will round up any request for an odd number of bytes, |
| 238 | * so if an odd bytecount is specified, be sure that there's at least one |
| 239 | * extra byte allocated for the buffer. |
| 240 | */ |
| 241 | |
| 242 | static void atapi_input_bytes(ide_drive_t *drive, void *buffer, u32 bytecount) |
| 243 | { |
| 244 | ide_hwif_t *hwif = HWIF(drive); |
| 245 | |
| 246 | ++bytecount; |
| 247 | #if defined(CONFIG_ATARI) || defined(CONFIG_Q40) |
| 248 | if (MACH_IS_ATARI || MACH_IS_Q40) { |
| 249 | /* Atari has a byte-swapped IDE interface */ |
| 250 | insw_swapw(IDE_DATA_REG, buffer, bytecount / 2); |
| 251 | return; |
| 252 | } |
| 253 | #endif /* CONFIG_ATARI || CONFIG_Q40 */ |
| 254 | hwif->ata_input_data(drive, buffer, bytecount / 4); |
| 255 | if ((bytecount & 0x03) >= 2) |
| 256 | hwif->INSW(IDE_DATA_REG, ((u8 *)buffer)+(bytecount & ~0x03), 1); |
| 257 | } |
| 258 | |
| 259 | static void atapi_output_bytes(ide_drive_t *drive, void *buffer, u32 bytecount) |
| 260 | { |
| 261 | ide_hwif_t *hwif = HWIF(drive); |
| 262 | |
| 263 | ++bytecount; |
| 264 | #if defined(CONFIG_ATARI) || defined(CONFIG_Q40) |
| 265 | if (MACH_IS_ATARI || MACH_IS_Q40) { |
| 266 | /* Atari has a byte-swapped IDE interface */ |
| 267 | outsw_swapw(IDE_DATA_REG, buffer, bytecount / 2); |
| 268 | return; |
| 269 | } |
| 270 | #endif /* CONFIG_ATARI || CONFIG_Q40 */ |
| 271 | hwif->ata_output_data(drive, buffer, bytecount / 4); |
| 272 | if ((bytecount & 0x03) >= 2) |
| 273 | hwif->OUTSW(IDE_DATA_REG, ((u8*)buffer)+(bytecount & ~0x03), 1); |
| 274 | } |
| 275 | |
| 276 | void default_hwif_transport(ide_hwif_t *hwif) |
| 277 | { |
| 278 | hwif->ata_input_data = ata_input_data; |
| 279 | hwif->ata_output_data = ata_output_data; |
| 280 | hwif->atapi_input_bytes = atapi_input_bytes; |
| 281 | hwif->atapi_output_bytes = atapi_output_bytes; |
| 282 | } |
| 283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | void ide_fix_driveid (struct hd_driveid *id) |
| 285 | { |
| 286 | #ifndef __LITTLE_ENDIAN |
| 287 | # ifdef __BIG_ENDIAN |
| 288 | int i; |
| 289 | u16 *stringcast; |
| 290 | |
| 291 | id->config = __le16_to_cpu(id->config); |
| 292 | id->cyls = __le16_to_cpu(id->cyls); |
| 293 | id->reserved2 = __le16_to_cpu(id->reserved2); |
| 294 | id->heads = __le16_to_cpu(id->heads); |
| 295 | id->track_bytes = __le16_to_cpu(id->track_bytes); |
| 296 | id->sector_bytes = __le16_to_cpu(id->sector_bytes); |
| 297 | id->sectors = __le16_to_cpu(id->sectors); |
| 298 | id->vendor0 = __le16_to_cpu(id->vendor0); |
| 299 | id->vendor1 = __le16_to_cpu(id->vendor1); |
| 300 | id->vendor2 = __le16_to_cpu(id->vendor2); |
| 301 | stringcast = (u16 *)&id->serial_no[0]; |
| 302 | for (i = 0; i < (20/2); i++) |
| 303 | stringcast[i] = __le16_to_cpu(stringcast[i]); |
| 304 | id->buf_type = __le16_to_cpu(id->buf_type); |
| 305 | id->buf_size = __le16_to_cpu(id->buf_size); |
| 306 | id->ecc_bytes = __le16_to_cpu(id->ecc_bytes); |
| 307 | stringcast = (u16 *)&id->fw_rev[0]; |
| 308 | for (i = 0; i < (8/2); i++) |
| 309 | stringcast[i] = __le16_to_cpu(stringcast[i]); |
| 310 | stringcast = (u16 *)&id->model[0]; |
| 311 | for (i = 0; i < (40/2); i++) |
| 312 | stringcast[i] = __le16_to_cpu(stringcast[i]); |
| 313 | id->dword_io = __le16_to_cpu(id->dword_io); |
| 314 | id->reserved50 = __le16_to_cpu(id->reserved50); |
| 315 | id->field_valid = __le16_to_cpu(id->field_valid); |
| 316 | id->cur_cyls = __le16_to_cpu(id->cur_cyls); |
| 317 | id->cur_heads = __le16_to_cpu(id->cur_heads); |
| 318 | id->cur_sectors = __le16_to_cpu(id->cur_sectors); |
| 319 | id->cur_capacity0 = __le16_to_cpu(id->cur_capacity0); |
| 320 | id->cur_capacity1 = __le16_to_cpu(id->cur_capacity1); |
| 321 | id->lba_capacity = __le32_to_cpu(id->lba_capacity); |
| 322 | id->dma_1word = __le16_to_cpu(id->dma_1word); |
| 323 | id->dma_mword = __le16_to_cpu(id->dma_mword); |
| 324 | id->eide_pio_modes = __le16_to_cpu(id->eide_pio_modes); |
| 325 | id->eide_dma_min = __le16_to_cpu(id->eide_dma_min); |
| 326 | id->eide_dma_time = __le16_to_cpu(id->eide_dma_time); |
| 327 | id->eide_pio = __le16_to_cpu(id->eide_pio); |
| 328 | id->eide_pio_iordy = __le16_to_cpu(id->eide_pio_iordy); |
| 329 | for (i = 0; i < 2; ++i) |
| 330 | id->words69_70[i] = __le16_to_cpu(id->words69_70[i]); |
| 331 | for (i = 0; i < 4; ++i) |
| 332 | id->words71_74[i] = __le16_to_cpu(id->words71_74[i]); |
| 333 | id->queue_depth = __le16_to_cpu(id->queue_depth); |
| 334 | for (i = 0; i < 4; ++i) |
| 335 | id->words76_79[i] = __le16_to_cpu(id->words76_79[i]); |
| 336 | id->major_rev_num = __le16_to_cpu(id->major_rev_num); |
| 337 | id->minor_rev_num = __le16_to_cpu(id->minor_rev_num); |
| 338 | id->command_set_1 = __le16_to_cpu(id->command_set_1); |
| 339 | id->command_set_2 = __le16_to_cpu(id->command_set_2); |
| 340 | id->cfsse = __le16_to_cpu(id->cfsse); |
| 341 | id->cfs_enable_1 = __le16_to_cpu(id->cfs_enable_1); |
| 342 | id->cfs_enable_2 = __le16_to_cpu(id->cfs_enable_2); |
| 343 | id->csf_default = __le16_to_cpu(id->csf_default); |
| 344 | id->dma_ultra = __le16_to_cpu(id->dma_ultra); |
| 345 | id->trseuc = __le16_to_cpu(id->trseuc); |
| 346 | id->trsEuc = __le16_to_cpu(id->trsEuc); |
| 347 | id->CurAPMvalues = __le16_to_cpu(id->CurAPMvalues); |
| 348 | id->mprc = __le16_to_cpu(id->mprc); |
| 349 | id->hw_config = __le16_to_cpu(id->hw_config); |
| 350 | id->acoustic = __le16_to_cpu(id->acoustic); |
| 351 | id->msrqs = __le16_to_cpu(id->msrqs); |
| 352 | id->sxfert = __le16_to_cpu(id->sxfert); |
| 353 | id->sal = __le16_to_cpu(id->sal); |
| 354 | id->spg = __le32_to_cpu(id->spg); |
| 355 | id->lba_capacity_2 = __le64_to_cpu(id->lba_capacity_2); |
| 356 | for (i = 0; i < 22; i++) |
| 357 | id->words104_125[i] = __le16_to_cpu(id->words104_125[i]); |
| 358 | id->last_lun = __le16_to_cpu(id->last_lun); |
| 359 | id->word127 = __le16_to_cpu(id->word127); |
| 360 | id->dlf = __le16_to_cpu(id->dlf); |
| 361 | id->csfo = __le16_to_cpu(id->csfo); |
| 362 | for (i = 0; i < 26; i++) |
| 363 | id->words130_155[i] = __le16_to_cpu(id->words130_155[i]); |
| 364 | id->word156 = __le16_to_cpu(id->word156); |
| 365 | for (i = 0; i < 3; i++) |
| 366 | id->words157_159[i] = __le16_to_cpu(id->words157_159[i]); |
| 367 | id->cfa_power = __le16_to_cpu(id->cfa_power); |
| 368 | for (i = 0; i < 14; i++) |
| 369 | id->words161_175[i] = __le16_to_cpu(id->words161_175[i]); |
| 370 | for (i = 0; i < 31; i++) |
| 371 | id->words176_205[i] = __le16_to_cpu(id->words176_205[i]); |
| 372 | for (i = 0; i < 48; i++) |
| 373 | id->words206_254[i] = __le16_to_cpu(id->words206_254[i]); |
| 374 | id->integrity_word = __le16_to_cpu(id->integrity_word); |
| 375 | # else |
| 376 | # error "Please fix <asm/byteorder.h>" |
| 377 | # endif |
| 378 | #endif |
| 379 | } |
| 380 | |
Bartlomiej Zolnierkiewicz | 0174511 | 2007-11-05 21:42:29 +0100 | [diff] [blame] | 381 | /* |
| 382 | * ide_fixstring() cleans up and (optionally) byte-swaps a text string, |
| 383 | * removing leading/trailing blanks and compressing internal blanks. |
| 384 | * It is primarily used to tidy up the model name/number fields as |
| 385 | * returned by the WIN_[P]IDENTIFY commands. |
| 386 | */ |
| 387 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | void ide_fixstring (u8 *s, const int bytecount, const int byteswap) |
| 389 | { |
| 390 | u8 *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */ |
| 391 | |
| 392 | if (byteswap) { |
| 393 | /* convert from big-endian to host byte order */ |
| 394 | for (p = end ; p != s;) { |
| 395 | unsigned short *pp = (unsigned short *) (p -= 2); |
| 396 | *pp = ntohs(*pp); |
| 397 | } |
| 398 | } |
| 399 | /* strip leading blanks */ |
| 400 | while (s != end && *s == ' ') |
| 401 | ++s; |
| 402 | /* compress internal blanks and strip trailing blanks */ |
| 403 | while (s != end && *s) { |
| 404 | if (*s++ != ' ' || (s != end && *s && *s != ' ')) |
| 405 | *p++ = *(s-1); |
| 406 | } |
| 407 | /* wipe out trailing garbage */ |
| 408 | while (p != end) |
| 409 | *p++ = '\0'; |
| 410 | } |
| 411 | |
| 412 | EXPORT_SYMBOL(ide_fixstring); |
| 413 | |
| 414 | /* |
| 415 | * Needed for PCI irq sharing |
| 416 | */ |
| 417 | int drive_is_ready (ide_drive_t *drive) |
| 418 | { |
| 419 | ide_hwif_t *hwif = HWIF(drive); |
| 420 | u8 stat = 0; |
| 421 | |
| 422 | if (drive->waiting_for_dma) |
| 423 | return hwif->ide_dma_test_irq(drive); |
| 424 | |
| 425 | #if 0 |
| 426 | /* need to guarantee 400ns since last command was issued */ |
| 427 | udelay(1); |
| 428 | #endif |
| 429 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | /* |
| 431 | * We do a passive status test under shared PCI interrupts on |
| 432 | * cards that truly share the ATA side interrupt, but may also share |
| 433 | * an interrupt with another pci card/device. We make no assumptions |
| 434 | * about possible isa-pnp and pci-pnp issues yet. |
| 435 | */ |
| 436 | if (IDE_CONTROL_REG) |
| 437 | stat = hwif->INB(IDE_ALTSTATUS_REG); |
| 438 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | /* Note: this may clear a pending IRQ!! */ |
| 440 | stat = hwif->INB(IDE_STATUS_REG); |
| 441 | |
| 442 | if (stat & BUSY_STAT) |
| 443 | /* drive busy: definitely not interrupting */ |
| 444 | return 0; |
| 445 | |
| 446 | /* drive ready: *might* be interrupting */ |
| 447 | return 1; |
| 448 | } |
| 449 | |
| 450 | EXPORT_SYMBOL(drive_is_ready); |
| 451 | |
| 452 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | * This routine busy-waits for the drive status to be not "busy". |
| 454 | * It then checks the status for all of the "good" bits and none |
| 455 | * of the "bad" bits, and if all is okay it returns 0. All other |
Bartlomiej Zolnierkiewicz | 74af21c | 2007-10-13 17:47:49 +0200 | [diff] [blame] | 456 | * cases return error -- caller may then invoke ide_error(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | * |
| 458 | * This routine should get fixed to not hog the cpu during extra long waits.. |
| 459 | * That could be done by busy-waiting for the first jiffy or two, and then |
| 460 | * setting a timer to wake up at half second intervals thereafter, |
| 461 | * until timeout is achieved, before timing out. |
| 462 | */ |
Bartlomiej Zolnierkiewicz | aedea59 | 2007-10-13 17:47:50 +0200 | [diff] [blame] | 463 | static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | { |
Bartlomiej Zolnierkiewicz | 74af21c | 2007-10-13 17:47:49 +0200 | [diff] [blame] | 465 | ide_hwif_t *hwif = drive->hwif; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | unsigned long flags; |
Bartlomiej Zolnierkiewicz | 74af21c | 2007-10-13 17:47:49 +0200 | [diff] [blame] | 467 | int i; |
| 468 | u8 stat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
| 470 | udelay(1); /* spec allows drive 400ns to assert "BUSY" */ |
| 471 | if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) { |
| 472 | local_irq_set(flags); |
| 473 | timeout += jiffies; |
| 474 | while ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) { |
| 475 | if (time_after(jiffies, timeout)) { |
| 476 | /* |
| 477 | * One last read after the timeout in case |
| 478 | * heavy interrupt load made us not make any |
| 479 | * progress during the timeout.. |
| 480 | */ |
| 481 | stat = hwif->INB(IDE_STATUS_REG); |
| 482 | if (!(stat & BUSY_STAT)) |
| 483 | break; |
| 484 | |
| 485 | local_irq_restore(flags); |
Bartlomiej Zolnierkiewicz | 74af21c | 2007-10-13 17:47:49 +0200 | [diff] [blame] | 486 | *rstat = stat; |
| 487 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | } |
| 489 | } |
| 490 | local_irq_restore(flags); |
| 491 | } |
| 492 | /* |
| 493 | * Allow status to settle, then read it again. |
| 494 | * A few rare drives vastly violate the 400ns spec here, |
| 495 | * so we'll wait up to 10usec for a "good" status |
| 496 | * rather than expensively fail things immediately. |
| 497 | * This fix courtesy of Matthew Faupel & Niccolo Rigacci. |
| 498 | */ |
| 499 | for (i = 0; i < 10; i++) { |
| 500 | udelay(1); |
Bartlomiej Zolnierkiewicz | 74af21c | 2007-10-13 17:47:49 +0200 | [diff] [blame] | 501 | if (OK_STAT((stat = hwif->INB(IDE_STATUS_REG)), good, bad)) { |
| 502 | *rstat = stat; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | return 0; |
Bartlomiej Zolnierkiewicz | 74af21c | 2007-10-13 17:47:49 +0200 | [diff] [blame] | 504 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | } |
Bartlomiej Zolnierkiewicz | 74af21c | 2007-10-13 17:47:49 +0200 | [diff] [blame] | 506 | *rstat = stat; |
| 507 | return -EFAULT; |
| 508 | } |
| 509 | |
| 510 | /* |
| 511 | * In case of error returns error value after doing "*startstop = ide_error()". |
| 512 | * The caller should return the updated value of "startstop" in this case, |
| 513 | * "startstop" is unchanged when the function returns 0. |
| 514 | */ |
| 515 | int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout) |
| 516 | { |
| 517 | int err; |
| 518 | u8 stat; |
| 519 | |
| 520 | /* bail early if we've exceeded max_failures */ |
| 521 | if (drive->max_failures && (drive->failures > drive->max_failures)) { |
| 522 | *startstop = ide_stopped; |
| 523 | return 1; |
| 524 | } |
| 525 | |
| 526 | err = __ide_wait_stat(drive, good, bad, timeout, &stat); |
| 527 | |
| 528 | if (err) { |
| 529 | char *s = (err == -EBUSY) ? "status timeout" : "status error"; |
| 530 | *startstop = ide_error(drive, s, stat); |
| 531 | } |
| 532 | |
| 533 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | } |
| 535 | |
| 536 | EXPORT_SYMBOL(ide_wait_stat); |
| 537 | |
Bartlomiej Zolnierkiewicz | a5b7e70 | 2007-08-20 22:42:56 +0200 | [diff] [blame] | 538 | /** |
| 539 | * ide_in_drive_list - look for drive in black/white list |
| 540 | * @id: drive identifier |
| 541 | * @drive_table: list to inspect |
| 542 | * |
| 543 | * Look for a drive in the blacklist and the whitelist tables |
| 544 | * Returns 1 if the drive is found in the table. |
| 545 | */ |
| 546 | |
| 547 | int ide_in_drive_list(struct hd_driveid *id, const struct drive_list_entry *drive_table) |
| 548 | { |
| 549 | for ( ; drive_table->id_model; drive_table++) |
| 550 | if ((!strcmp(drive_table->id_model, id->model)) && |
| 551 | (!drive_table->id_firmware || |
| 552 | strstr(id->fw_rev, drive_table->id_firmware))) |
| 553 | return 1; |
| 554 | return 0; |
| 555 | } |
| 556 | |
Bartlomiej Zolnierkiewicz | b0244a0 | 2007-08-20 22:42:57 +0200 | [diff] [blame] | 557 | EXPORT_SYMBOL_GPL(ide_in_drive_list); |
| 558 | |
Bartlomiej Zolnierkiewicz | a5b7e70 | 2007-08-20 22:42:56 +0200 | [diff] [blame] | 559 | /* |
| 560 | * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid. |
| 561 | * We list them here and depend on the device side cable detection for them. |
Bartlomiej Zolnierkiewicz | 8588a2b7 | 2007-10-26 20:31:16 +0200 | [diff] [blame] | 562 | * |
| 563 | * Some optical devices with the buggy firmwares have the same problem. |
Bartlomiej Zolnierkiewicz | a5b7e70 | 2007-08-20 22:42:56 +0200 | [diff] [blame] | 564 | */ |
| 565 | static const struct drive_list_entry ivb_list[] = { |
| 566 | { "QUANTUM FIREBALLlct10 05" , "A03.0900" }, |
Bartlomiej Zolnierkiewicz | 8588a2b7 | 2007-10-26 20:31:16 +0200 | [diff] [blame] | 567 | { "TSSTcorp CDDVDW SH-S202J" , "SB00" }, |
Peter Missel | e97564f | 2007-11-27 21:35:57 +0100 | [diff] [blame] | 568 | { "TSSTcorp CDDVDW SH-S202J" , "SB01" }, |
| 569 | { "TSSTcorp CDDVDW SH-S202N" , "SB00" }, |
| 570 | { "TSSTcorp CDDVDW SH-S202N" , "SB01" }, |
Bartlomiej Zolnierkiewicz | a5b7e70 | 2007-08-20 22:42:56 +0200 | [diff] [blame] | 571 | { NULL , NULL } |
| 572 | }; |
| 573 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | /* |
| 575 | * All hosts that use the 80c ribbon must use! |
| 576 | * The name is derived from upper byte of word 93 and the 80c ribbon. |
| 577 | */ |
| 578 | u8 eighty_ninty_three (ide_drive_t *drive) |
| 579 | { |
Bartlomiej Zolnierkiewicz | 7f8f48a | 2007-05-10 00:01:10 +0200 | [diff] [blame] | 580 | ide_hwif_t *hwif = drive->hwif; |
| 581 | struct hd_driveid *id = drive->id; |
Bartlomiej Zolnierkiewicz | a5b7e70 | 2007-08-20 22:42:56 +0200 | [diff] [blame] | 582 | int ivb = ide_in_drive_list(id, ivb_list); |
Bartlomiej Zolnierkiewicz | 7f8f48a | 2007-05-10 00:01:10 +0200 | [diff] [blame] | 583 | |
Bartlomiej Zolnierkiewicz | 49521f9 | 2007-07-09 23:17:58 +0200 | [diff] [blame] | 584 | if (hwif->cbl == ATA_CBL_PATA40_SHORT) |
| 585 | return 1; |
| 586 | |
Bartlomiej Zolnierkiewicz | a5b7e70 | 2007-08-20 22:42:56 +0200 | [diff] [blame] | 587 | if (ivb) |
| 588 | printk(KERN_DEBUG "%s: skipping word 93 validity check\n", |
| 589 | drive->name); |
| 590 | |
George Kibardin | b98f880 | 2008-01-10 23:03:42 +0100 | [diff] [blame] | 591 | if (ide_dev_is_sata(id) && !ivb) |
| 592 | return 1; |
| 593 | |
Bartlomiej Zolnierkiewicz | a5b7e70 | 2007-08-20 22:42:56 +0200 | [diff] [blame] | 594 | if (hwif->cbl != ATA_CBL_PATA80 && !ivb) |
Bartlomiej Zolnierkiewicz | 7f8f48a | 2007-05-10 00:01:10 +0200 | [diff] [blame] | 595 | goto no_80w; |
Alan Cox | 1a1276e | 2006-06-28 04:26:58 -0700 | [diff] [blame] | 596 | |
Bartlomiej Zolnierkiewicz | f68d932 | 2007-03-26 23:03:18 +0200 | [diff] [blame] | 597 | /* |
| 598 | * FIXME: |
Bartlomiej Zolnierkiewicz | a5b7e70 | 2007-08-20 22:42:56 +0200 | [diff] [blame] | 599 | * - force bit13 (80c cable present) check also for !ivb devices |
Bartlomiej Zolnierkiewicz | f68d932 | 2007-03-26 23:03:18 +0200 | [diff] [blame] | 600 | * (unless the slave device is pre-ATA3) |
| 601 | */ |
Bartlomiej Zolnierkiewicz | a5b7e70 | 2007-08-20 22:42:56 +0200 | [diff] [blame] | 602 | if ((id->hw_config & 0x4000) || (ivb && (id->hw_config & 0x2000))) |
Bartlomiej Zolnierkiewicz | 7f8f48a | 2007-05-10 00:01:10 +0200 | [diff] [blame] | 603 | return 1; |
| 604 | |
| 605 | no_80w: |
| 606 | if (drive->udma33_warned == 1) |
| 607 | return 0; |
| 608 | |
| 609 | printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, " |
| 610 | "limiting max speed to UDMA33\n", |
Bartlomiej Zolnierkiewicz | 49521f9 | 2007-07-09 23:17:58 +0200 | [diff] [blame] | 611 | drive->name, |
| 612 | hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host"); |
Bartlomiej Zolnierkiewicz | 7f8f48a | 2007-05-10 00:01:10 +0200 | [diff] [blame] | 613 | |
| 614 | drive->udma33_warned = 1; |
| 615 | |
| 616 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | } |
| 618 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | int ide_ata66_check (ide_drive_t *drive, ide_task_t *args) |
| 620 | { |
Bartlomiej Zolnierkiewicz | 650d841 | 2008-01-25 22:17:06 +0100 | [diff] [blame] | 621 | if (args->tf.command == WIN_SETFEATURES && |
Bartlomiej Zolnierkiewicz | 5a9e77a | 2008-01-26 20:13:13 +0100 | [diff] [blame] | 622 | args->tf.nsect > XFER_UDMA_2 && |
Bartlomiej Zolnierkiewicz | 650d841 | 2008-01-25 22:17:06 +0100 | [diff] [blame] | 623 | args->tf.feature == SETFEATURES_XFER) { |
Bartlomiej Zolnierkiewicz | 7f8f48a | 2007-05-10 00:01:10 +0200 | [diff] [blame] | 624 | if (eighty_ninty_three(drive) == 0) { |
| 625 | printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot " |
| 626 | "be set\n", drive->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | return 1; |
| 628 | } |
| 629 | } |
Bartlomiej Zolnierkiewicz | 7f8f48a | 2007-05-10 00:01:10 +0200 | [diff] [blame] | 630 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | return 0; |
| 632 | } |
| 633 | |
| 634 | /* |
| 635 | * Backside of HDIO_DRIVE_CMD call of SETFEATURES_XFER. |
| 636 | * 1 : Safe to update drive->id DMA registers. |
| 637 | * 0 : OOPs not allowed. |
| 638 | */ |
| 639 | int set_transfer (ide_drive_t *drive, ide_task_t *args) |
| 640 | { |
Bartlomiej Zolnierkiewicz | 650d841 | 2008-01-25 22:17:06 +0100 | [diff] [blame] | 641 | if (args->tf.command == WIN_SETFEATURES && |
Bartlomiej Zolnierkiewicz | 5a9e77a | 2008-01-26 20:13:13 +0100 | [diff] [blame] | 642 | args->tf.nsect >= XFER_SW_DMA_0 && |
Bartlomiej Zolnierkiewicz | 650d841 | 2008-01-25 22:17:06 +0100 | [diff] [blame] | 643 | args->tf.feature == SETFEATURES_XFER && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | (drive->id->dma_ultra || |
| 645 | drive->id->dma_mword || |
| 646 | drive->id->dma_1word)) |
| 647 | return 1; |
| 648 | |
| 649 | return 0; |
| 650 | } |
| 651 | |
| 652 | #ifdef CONFIG_BLK_DEV_IDEDMA |
| 653 | static u8 ide_auto_reduce_xfer (ide_drive_t *drive) |
| 654 | { |
| 655 | if (!drive->crc_count) |
| 656 | return drive->current_speed; |
| 657 | drive->crc_count = 0; |
| 658 | |
| 659 | switch(drive->current_speed) { |
| 660 | case XFER_UDMA_7: return XFER_UDMA_6; |
| 661 | case XFER_UDMA_6: return XFER_UDMA_5; |
| 662 | case XFER_UDMA_5: return XFER_UDMA_4; |
| 663 | case XFER_UDMA_4: return XFER_UDMA_3; |
| 664 | case XFER_UDMA_3: return XFER_UDMA_2; |
| 665 | case XFER_UDMA_2: return XFER_UDMA_1; |
| 666 | case XFER_UDMA_1: return XFER_UDMA_0; |
| 667 | /* |
| 668 | * OOPS we do not goto non Ultra DMA modes |
| 669 | * without iCRC's available we force |
| 670 | * the system to PIO and make the user |
| 671 | * invoke the ATA-1 ATA-2 DMA modes. |
| 672 | */ |
| 673 | case XFER_UDMA_0: |
| 674 | default: return XFER_PIO_4; |
| 675 | } |
| 676 | } |
| 677 | #endif /* CONFIG_BLK_DEV_IDEDMA */ |
| 678 | |
Bartlomiej Zolnierkiewicz | 8a45513 | 2007-10-20 00:32:36 +0200 | [diff] [blame] | 679 | int ide_driveid_update(ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | { |
Bartlomiej Zolnierkiewicz | 8a45513 | 2007-10-20 00:32:36 +0200 | [diff] [blame] | 681 | ide_hwif_t *hwif = drive->hwif; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | struct hd_driveid *id; |
Bartlomiej Zolnierkiewicz | 8a45513 | 2007-10-20 00:32:36 +0200 | [diff] [blame] | 683 | unsigned long timeout, flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | /* |
| 686 | * Re-read drive->id for possible DMA mode |
| 687 | * change (copied from ide-probe.c) |
| 688 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | |
| 690 | SELECT_MASK(drive, 1); |
Bartlomiej Zolnierkiewicz | 81ca691 | 2008-01-26 20:13:08 +0100 | [diff] [blame] | 691 | ide_set_irq(drive, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | msleep(50); |
| 693 | hwif->OUTB(WIN_IDENTIFY, IDE_COMMAND_REG); |
| 694 | timeout = jiffies + WAIT_WORSTCASE; |
| 695 | do { |
| 696 | if (time_after(jiffies, timeout)) { |
| 697 | SELECT_MASK(drive, 0); |
| 698 | return 0; /* drive timed-out */ |
| 699 | } |
| 700 | msleep(50); /* give drive a breather */ |
| 701 | } while (hwif->INB(IDE_ALTSTATUS_REG) & BUSY_STAT); |
| 702 | msleep(50); /* wait for IRQ and DRQ_STAT */ |
| 703 | if (!OK_STAT(hwif->INB(IDE_STATUS_REG),DRQ_STAT,BAD_R_STAT)) { |
| 704 | SELECT_MASK(drive, 0); |
| 705 | printk("%s: CHECK for good STATUS\n", drive->name); |
| 706 | return 0; |
| 707 | } |
| 708 | local_irq_save(flags); |
| 709 | SELECT_MASK(drive, 0); |
| 710 | id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC); |
| 711 | if (!id) { |
| 712 | local_irq_restore(flags); |
| 713 | return 0; |
| 714 | } |
| 715 | ata_input_data(drive, id, SECTOR_WORDS); |
| 716 | (void) hwif->INB(IDE_STATUS_REG); /* clear drive IRQ */ |
| 717 | local_irq_enable(); |
| 718 | local_irq_restore(flags); |
| 719 | ide_fix_driveid(id); |
| 720 | if (id) { |
| 721 | drive->id->dma_ultra = id->dma_ultra; |
| 722 | drive->id->dma_mword = id->dma_mword; |
| 723 | drive->id->dma_1word = id->dma_1word; |
| 724 | /* anything more ? */ |
| 725 | kfree(id); |
Bartlomiej Zolnierkiewicz | 3ab7efe | 2007-12-12 23:31:58 +0100 | [diff] [blame] | 726 | |
| 727 | if (drive->using_dma && ide_id_dma_bug(drive)) |
| 728 | ide_dma_off(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | } |
| 730 | |
| 731 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | } |
| 733 | |
Bartlomiej Zolnierkiewicz | 74af21c | 2007-10-13 17:47:49 +0200 | [diff] [blame] | 734 | int ide_config_drive_speed(ide_drive_t *drive, u8 speed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | { |
Bartlomiej Zolnierkiewicz | 74af21c | 2007-10-13 17:47:49 +0200 | [diff] [blame] | 736 | ide_hwif_t *hwif = drive->hwif; |
Sergei Shtylyov | 89613e6 | 2007-11-27 21:35:52 +0100 | [diff] [blame] | 737 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | u8 stat; |
| 739 | |
| 740 | // while (HWGROUP(drive)->busy) |
| 741 | // msleep(50); |
| 742 | |
| 743 | #ifdef CONFIG_BLK_DEV_IDEDMA |
Bartlomiej Zolnierkiewicz | 15ce926 | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 744 | if (hwif->dma_host_set) /* check if host supports DMA */ |
| 745 | hwif->dma_host_set(drive, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | #endif |
| 747 | |
Sergei Shtylyov | 89613e6 | 2007-11-27 21:35:52 +0100 | [diff] [blame] | 748 | /* Skip setting PIO flow-control modes on pre-EIDE drives */ |
| 749 | if ((speed & 0xf8) == XFER_PIO_0 && !(drive->id->capability & 0x08)) |
| 750 | goto skip; |
| 751 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | /* |
| 753 | * Don't use ide_wait_cmd here - it will |
| 754 | * attempt to set_geometry and recalibrate, |
| 755 | * but for some reason these don't work at |
| 756 | * this point (lost interrupt). |
| 757 | */ |
| 758 | /* |
| 759 | * Select the drive, and issue the SETFEATURES command |
| 760 | */ |
| 761 | disable_irq_nosync(hwif->irq); |
| 762 | |
| 763 | /* |
| 764 | * FIXME: we race against the running IRQ here if |
| 765 | * this is called from non IRQ context. If we use |
| 766 | * disable_irq() we hang on the error path. Work |
| 767 | * is needed. |
| 768 | */ |
| 769 | |
| 770 | udelay(1); |
| 771 | SELECT_DRIVE(drive); |
| 772 | SELECT_MASK(drive, 0); |
| 773 | udelay(1); |
Bartlomiej Zolnierkiewicz | 81ca691 | 2008-01-26 20:13:08 +0100 | [diff] [blame] | 774 | ide_set_irq(drive, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | hwif->OUTB(speed, IDE_NSECTOR_REG); |
| 776 | hwif->OUTB(SETFEATURES_XFER, IDE_FEATURE_REG); |
Bartlomiej Zolnierkiewicz | adcd33d | 2007-08-20 22:42:56 +0200 | [diff] [blame] | 777 | hwif->OUTBSYNC(drive, WIN_SETFEATURES, IDE_COMMAND_REG); |
Bartlomiej Zolnierkiewicz | 81ca691 | 2008-01-26 20:13:08 +0100 | [diff] [blame] | 778 | if (drive->quirk_list == 2) |
| 779 | ide_set_irq(drive, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | |
Bartlomiej Zolnierkiewicz | 74af21c | 2007-10-13 17:47:49 +0200 | [diff] [blame] | 781 | error = __ide_wait_stat(drive, drive->ready_stat, |
| 782 | BUSY_STAT|DRQ_STAT|ERR_STAT, |
| 783 | WAIT_CMD, &stat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | |
| 785 | SELECT_MASK(drive, 0); |
| 786 | |
| 787 | enable_irq(hwif->irq); |
| 788 | |
| 789 | if (error) { |
| 790 | (void) ide_dump_status(drive, "set_drive_speed_status", stat); |
| 791 | return error; |
| 792 | } |
| 793 | |
| 794 | drive->id->dma_ultra &= ~0xFF00; |
| 795 | drive->id->dma_mword &= ~0x0F00; |
| 796 | drive->id->dma_1word &= ~0x0F00; |
| 797 | |
Sergei Shtylyov | 89613e6 | 2007-11-27 21:35:52 +0100 | [diff] [blame] | 798 | skip: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | #ifdef CONFIG_BLK_DEV_IDEDMA |
Bartlomiej Zolnierkiewicz | f37aaf9 | 2008-01-26 20:13:02 +0100 | [diff] [blame] | 800 | if ((speed >= XFER_SW_DMA_0 || (hwif->host_flags & IDE_HFLAG_VDMA)) && |
| 801 | drive->using_dma) |
Bartlomiej Zolnierkiewicz | 15ce926 | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 802 | hwif->dma_host_set(drive, 1); |
| 803 | else if (hwif->dma_host_set) /* check if host supports DMA */ |
Bartlomiej Zolnierkiewicz | 4a546e0 | 2008-01-26 20:13:01 +0100 | [diff] [blame] | 804 | ide_dma_off_quietly(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | #endif |
| 806 | |
| 807 | switch(speed) { |
| 808 | case XFER_UDMA_7: drive->id->dma_ultra |= 0x8080; break; |
| 809 | case XFER_UDMA_6: drive->id->dma_ultra |= 0x4040; break; |
| 810 | case XFER_UDMA_5: drive->id->dma_ultra |= 0x2020; break; |
| 811 | case XFER_UDMA_4: drive->id->dma_ultra |= 0x1010; break; |
| 812 | case XFER_UDMA_3: drive->id->dma_ultra |= 0x0808; break; |
| 813 | case XFER_UDMA_2: drive->id->dma_ultra |= 0x0404; break; |
| 814 | case XFER_UDMA_1: drive->id->dma_ultra |= 0x0202; break; |
| 815 | case XFER_UDMA_0: drive->id->dma_ultra |= 0x0101; break; |
| 816 | case XFER_MW_DMA_2: drive->id->dma_mword |= 0x0404; break; |
| 817 | case XFER_MW_DMA_1: drive->id->dma_mword |= 0x0202; break; |
| 818 | case XFER_MW_DMA_0: drive->id->dma_mword |= 0x0101; break; |
| 819 | case XFER_SW_DMA_2: drive->id->dma_1word |= 0x0404; break; |
| 820 | case XFER_SW_DMA_1: drive->id->dma_1word |= 0x0202; break; |
| 821 | case XFER_SW_DMA_0: drive->id->dma_1word |= 0x0101; break; |
| 822 | default: break; |
| 823 | } |
| 824 | if (!drive->init_speed) |
| 825 | drive->init_speed = speed; |
| 826 | drive->current_speed = speed; |
| 827 | return error; |
| 828 | } |
| 829 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | /* |
| 831 | * This should get invoked any time we exit the driver to |
| 832 | * wait for an interrupt response from a drive. handler() points |
| 833 | * at the appropriate code to handle the next interrupt, and a |
| 834 | * timer is started to prevent us from waiting forever in case |
| 835 | * something goes wrong (see the ide_timer_expiry() handler later on). |
| 836 | * |
| 837 | * See also ide_execute_command |
| 838 | */ |
| 839 | static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, |
| 840 | unsigned int timeout, ide_expiry_t *expiry) |
| 841 | { |
| 842 | ide_hwgroup_t *hwgroup = HWGROUP(drive); |
| 843 | |
| 844 | if (hwgroup->handler != NULL) { |
| 845 | printk(KERN_CRIT "%s: ide_set_handler: handler not null; " |
| 846 | "old=%p, new=%p\n", |
| 847 | drive->name, hwgroup->handler, handler); |
| 848 | } |
| 849 | hwgroup->handler = handler; |
| 850 | hwgroup->expiry = expiry; |
| 851 | hwgroup->timer.expires = jiffies + timeout; |
Suleiman Souhlal | 2345031 | 2007-04-10 22:38:37 +0200 | [diff] [blame] | 852 | hwgroup->req_gen_timer = hwgroup->req_gen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | add_timer(&hwgroup->timer); |
| 854 | } |
| 855 | |
| 856 | void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, |
| 857 | unsigned int timeout, ide_expiry_t *expiry) |
| 858 | { |
| 859 | unsigned long flags; |
| 860 | spin_lock_irqsave(&ide_lock, flags); |
| 861 | __ide_set_handler(drive, handler, timeout, expiry); |
| 862 | spin_unlock_irqrestore(&ide_lock, flags); |
| 863 | } |
| 864 | |
| 865 | EXPORT_SYMBOL(ide_set_handler); |
| 866 | |
| 867 | /** |
| 868 | * ide_execute_command - execute an IDE command |
| 869 | * @drive: IDE drive to issue the command against |
| 870 | * @command: command byte to write |
| 871 | * @handler: handler for next phase |
| 872 | * @timeout: timeout for command |
| 873 | * @expiry: handler to run on timeout |
| 874 | * |
| 875 | * Helper function to issue an IDE command. This handles the |
| 876 | * atomicity requirements, command timing and ensures that the |
| 877 | * handler and IRQ setup do not race. All IDE command kick off |
| 878 | * should go via this function or do equivalent locking. |
| 879 | */ |
Bartlomiej Zolnierkiewicz | cd2a2d9 | 2008-01-25 22:17:06 +0100 | [diff] [blame] | 880 | |
| 881 | void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler, |
| 882 | unsigned timeout, ide_expiry_t *expiry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | { |
| 884 | unsigned long flags; |
| 885 | ide_hwgroup_t *hwgroup = HWGROUP(drive); |
| 886 | ide_hwif_t *hwif = HWIF(drive); |
| 887 | |
| 888 | spin_lock_irqsave(&ide_lock, flags); |
| 889 | |
Eric Sesterhenn | 125e187 | 2006-06-23 02:06:06 -0700 | [diff] [blame] | 890 | BUG_ON(hwgroup->handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | hwgroup->handler = handler; |
| 892 | hwgroup->expiry = expiry; |
| 893 | hwgroup->timer.expires = jiffies + timeout; |
Suleiman Souhlal | 2345031 | 2007-04-10 22:38:37 +0200 | [diff] [blame] | 894 | hwgroup->req_gen_timer = hwgroup->req_gen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | add_timer(&hwgroup->timer); |
| 896 | hwif->OUTBSYNC(drive, cmd, IDE_COMMAND_REG); |
| 897 | /* Drive takes 400nS to respond, we must avoid the IRQ being |
| 898 | serviced before that. |
| 899 | |
| 900 | FIXME: we could skip this delay with care on non shared |
| 901 | devices |
| 902 | */ |
| 903 | ndelay(400); |
| 904 | spin_unlock_irqrestore(&ide_lock, flags); |
| 905 | } |
| 906 | |
| 907 | EXPORT_SYMBOL(ide_execute_command); |
| 908 | |
| 909 | |
| 910 | /* needed below */ |
| 911 | static ide_startstop_t do_reset1 (ide_drive_t *, int); |
| 912 | |
| 913 | /* |
| 914 | * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms |
| 915 | * during an atapi drive reset operation. If the drive has not yet responded, |
| 916 | * and we have not yet hit our maximum waiting time, then the timer is restarted |
| 917 | * for another 50ms. |
| 918 | */ |
| 919 | static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive) |
| 920 | { |
| 921 | ide_hwgroup_t *hwgroup = HWGROUP(drive); |
| 922 | ide_hwif_t *hwif = HWIF(drive); |
| 923 | u8 stat; |
| 924 | |
| 925 | SELECT_DRIVE(drive); |
| 926 | udelay (10); |
| 927 | |
| 928 | if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG), 0, BUSY_STAT)) { |
| 929 | printk("%s: ATAPI reset complete\n", drive->name); |
| 930 | } else { |
| 931 | if (time_before(jiffies, hwgroup->poll_timeout)) { |
Eric Sesterhenn | 125e187 | 2006-06-23 02:06:06 -0700 | [diff] [blame] | 932 | BUG_ON(HWGROUP(drive)->handler != NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); |
| 934 | /* continue polling */ |
| 935 | return ide_started; |
| 936 | } |
| 937 | /* end of polling */ |
| 938 | hwgroup->polling = 0; |
| 939 | printk("%s: ATAPI reset timed-out, status=0x%02x\n", |
| 940 | drive->name, stat); |
| 941 | /* do it the old fashioned way */ |
| 942 | return do_reset1(drive, 1); |
| 943 | } |
| 944 | /* done polling */ |
| 945 | hwgroup->polling = 0; |
Alan Cox | 913759a | 2006-10-03 01:14:33 -0700 | [diff] [blame] | 946 | hwgroup->resetting = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | return ide_stopped; |
| 948 | } |
| 949 | |
| 950 | /* |
| 951 | * reset_pollfunc() gets invoked to poll the interface for completion every 50ms |
| 952 | * during an ide reset operation. If the drives have not yet responded, |
| 953 | * and we have not yet hit our maximum waiting time, then the timer is restarted |
| 954 | * for another 50ms. |
| 955 | */ |
| 956 | static ide_startstop_t reset_pollfunc (ide_drive_t *drive) |
| 957 | { |
| 958 | ide_hwgroup_t *hwgroup = HWGROUP(drive); |
| 959 | ide_hwif_t *hwif = HWIF(drive); |
| 960 | u8 tmp; |
| 961 | |
| 962 | if (hwif->reset_poll != NULL) { |
| 963 | if (hwif->reset_poll(drive)) { |
| 964 | printk(KERN_ERR "%s: host reset_poll failure for %s.\n", |
| 965 | hwif->name, drive->name); |
| 966 | return ide_stopped; |
| 967 | } |
| 968 | } |
| 969 | |
| 970 | if (!OK_STAT(tmp = hwif->INB(IDE_STATUS_REG), 0, BUSY_STAT)) { |
| 971 | if (time_before(jiffies, hwgroup->poll_timeout)) { |
Eric Sesterhenn | 125e187 | 2006-06-23 02:06:06 -0700 | [diff] [blame] | 972 | BUG_ON(HWGROUP(drive)->handler != NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); |
| 974 | /* continue polling */ |
| 975 | return ide_started; |
| 976 | } |
| 977 | printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp); |
| 978 | drive->failures++; |
| 979 | } else { |
| 980 | printk("%s: reset: ", hwif->name); |
| 981 | if ((tmp = hwif->INB(IDE_ERROR_REG)) == 1) { |
| 982 | printk("success\n"); |
| 983 | drive->failures = 0; |
| 984 | } else { |
| 985 | drive->failures++; |
| 986 | printk("master: "); |
| 987 | switch (tmp & 0x7f) { |
| 988 | case 1: printk("passed"); |
| 989 | break; |
| 990 | case 2: printk("formatter device error"); |
| 991 | break; |
| 992 | case 3: printk("sector buffer error"); |
| 993 | break; |
| 994 | case 4: printk("ECC circuitry error"); |
| 995 | break; |
| 996 | case 5: printk("controlling MPU error"); |
| 997 | break; |
| 998 | default:printk("error (0x%02x?)", tmp); |
| 999 | } |
| 1000 | if (tmp & 0x80) |
| 1001 | printk("; slave: failed"); |
| 1002 | printk("\n"); |
| 1003 | } |
| 1004 | } |
| 1005 | hwgroup->polling = 0; /* done polling */ |
Alan Cox | 913759a | 2006-10-03 01:14:33 -0700 | [diff] [blame] | 1006 | hwgroup->resetting = 0; /* done reset attempt */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | return ide_stopped; |
| 1008 | } |
| 1009 | |
| 1010 | static void check_dma_crc(ide_drive_t *drive) |
| 1011 | { |
| 1012 | #ifdef CONFIG_BLK_DEV_IDEDMA |
| 1013 | if (drive->crc_count) { |
Bartlomiej Zolnierkiewicz | 4a546e0 | 2008-01-26 20:13:01 +0100 | [diff] [blame] | 1014 | ide_dma_off_quietly(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | ide_set_xfer_rate(drive, ide_auto_reduce_xfer(drive)); |
| 1016 | if (drive->current_speed >= XFER_SW_DMA_0) |
Bartlomiej Zolnierkiewicz | 4a546e0 | 2008-01-26 20:13:01 +0100 | [diff] [blame] | 1017 | ide_dma_on(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | } else |
Bartlomiej Zolnierkiewicz | 7469aaf | 2007-02-17 02:40:26 +0100 | [diff] [blame] | 1019 | ide_dma_off(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | #endif |
| 1021 | } |
| 1022 | |
| 1023 | static void ide_disk_pre_reset(ide_drive_t *drive) |
| 1024 | { |
| 1025 | int legacy = (drive->id->cfs_enable_2 & 0x0400) ? 0 : 1; |
| 1026 | |
| 1027 | drive->special.all = 0; |
| 1028 | drive->special.b.set_geometry = legacy; |
| 1029 | drive->special.b.recalibrate = legacy; |
Bartlomiej Zolnierkiewicz | 4ee06b7 | 2008-01-25 22:17:08 +0100 | [diff] [blame] | 1030 | drive->mult_count = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | if (!drive->keep_settings && !drive->using_dma) |
| 1032 | drive->mult_req = 0; |
| 1033 | if (drive->mult_req != drive->mult_count) |
| 1034 | drive->special.b.set_multmode = 1; |
| 1035 | } |
| 1036 | |
| 1037 | static void pre_reset(ide_drive_t *drive) |
| 1038 | { |
| 1039 | if (drive->media == ide_disk) |
| 1040 | ide_disk_pre_reset(drive); |
| 1041 | else |
| 1042 | drive->post_reset = 1; |
| 1043 | |
| 1044 | if (!drive->keep_settings) { |
| 1045 | if (drive->using_dma) { |
| 1046 | check_dma_crc(drive); |
| 1047 | } else { |
| 1048 | drive->unmask = 0; |
| 1049 | drive->io_32bit = 0; |
| 1050 | } |
| 1051 | return; |
| 1052 | } |
| 1053 | if (drive->using_dma) |
| 1054 | check_dma_crc(drive); |
| 1055 | |
| 1056 | if (HWIF(drive)->pre_reset != NULL) |
| 1057 | HWIF(drive)->pre_reset(drive); |
| 1058 | |
Suleiman Souhlal | 513daad | 2007-03-26 23:03:20 +0200 | [diff] [blame] | 1059 | if (drive->current_speed != 0xff) |
| 1060 | drive->desired_speed = drive->current_speed; |
| 1061 | drive->current_speed = 0xff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | } |
| 1063 | |
| 1064 | /* |
| 1065 | * do_reset1() attempts to recover a confused drive by resetting it. |
| 1066 | * Unfortunately, resetting a disk drive actually resets all devices on |
| 1067 | * the same interface, so it can really be thought of as resetting the |
| 1068 | * interface rather than resetting the drive. |
| 1069 | * |
| 1070 | * ATAPI devices have their own reset mechanism which allows them to be |
| 1071 | * individually reset without clobbering other devices on the same interface. |
| 1072 | * |
| 1073 | * Unfortunately, the IDE interface does not generate an interrupt to let |
| 1074 | * us know when the reset operation has finished, so we must poll for this. |
| 1075 | * Equally poor, though, is the fact that this may a very long time to complete, |
| 1076 | * (up to 30 seconds worstcase). So, instead of busy-waiting here for it, |
| 1077 | * we set a timer to poll at 50ms intervals. |
| 1078 | */ |
| 1079 | static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi) |
| 1080 | { |
| 1081 | unsigned int unit; |
| 1082 | unsigned long flags; |
| 1083 | ide_hwif_t *hwif; |
| 1084 | ide_hwgroup_t *hwgroup; |
| 1085 | |
| 1086 | spin_lock_irqsave(&ide_lock, flags); |
| 1087 | hwif = HWIF(drive); |
| 1088 | hwgroup = HWGROUP(drive); |
| 1089 | |
| 1090 | /* We must not reset with running handlers */ |
Eric Sesterhenn | 125e187 | 2006-06-23 02:06:06 -0700 | [diff] [blame] | 1091 | BUG_ON(hwgroup->handler != NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | |
| 1093 | /* For an ATAPI device, first try an ATAPI SRST. */ |
| 1094 | if (drive->media != ide_disk && !do_not_try_atapi) { |
Alan Cox | 913759a | 2006-10-03 01:14:33 -0700 | [diff] [blame] | 1095 | hwgroup->resetting = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | pre_reset(drive); |
| 1097 | SELECT_DRIVE(drive); |
| 1098 | udelay (20); |
Alan Cox | 68ad991 | 2005-06-27 15:24:25 -0700 | [diff] [blame] | 1099 | hwif->OUTBSYNC(drive, WIN_SRST, IDE_COMMAND_REG); |
| 1100 | ndelay(400); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; |
| 1102 | hwgroup->polling = 1; |
| 1103 | __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); |
| 1104 | spin_unlock_irqrestore(&ide_lock, flags); |
| 1105 | return ide_started; |
| 1106 | } |
| 1107 | |
| 1108 | /* |
| 1109 | * First, reset any device state data we were maintaining |
| 1110 | * for any of the drives on this interface. |
| 1111 | */ |
| 1112 | for (unit = 0; unit < MAX_DRIVES; ++unit) |
| 1113 | pre_reset(&hwif->drives[unit]); |
| 1114 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | if (!IDE_CONTROL_REG) { |
| 1116 | spin_unlock_irqrestore(&ide_lock, flags); |
| 1117 | return ide_stopped; |
| 1118 | } |
| 1119 | |
Alan Cox | 913759a | 2006-10-03 01:14:33 -0700 | [diff] [blame] | 1120 | hwgroup->resetting = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | /* |
| 1122 | * Note that we also set nIEN while resetting the device, |
| 1123 | * to mask unwanted interrupts from the interface during the reset. |
| 1124 | * However, due to the design of PC hardware, this will cause an |
| 1125 | * immediate interrupt due to the edge transition it produces. |
| 1126 | * This single interrupt gives us a "fast poll" for drives that |
| 1127 | * recover from reset very quickly, saving us the first 50ms wait time. |
| 1128 | */ |
| 1129 | /* set SRST and nIEN */ |
| 1130 | hwif->OUTBSYNC(drive, drive->ctl|6,IDE_CONTROL_REG); |
| 1131 | /* more than enough time */ |
| 1132 | udelay(10); |
| 1133 | if (drive->quirk_list == 2) { |
| 1134 | /* clear SRST and nIEN */ |
| 1135 | hwif->OUTBSYNC(drive, drive->ctl, IDE_CONTROL_REG); |
| 1136 | } else { |
| 1137 | /* clear SRST, leave nIEN */ |
| 1138 | hwif->OUTBSYNC(drive, drive->ctl|2, IDE_CONTROL_REG); |
| 1139 | } |
| 1140 | /* more than enough time */ |
| 1141 | udelay(10); |
| 1142 | hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; |
| 1143 | hwgroup->polling = 1; |
| 1144 | __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); |
| 1145 | |
| 1146 | /* |
| 1147 | * Some weird controller like resetting themselves to a strange |
| 1148 | * state when the disks are reset this way. At least, the Winbond |
| 1149 | * 553 documentation says that |
| 1150 | */ |
Bartlomiej Zolnierkiewicz | 4ee06b7 | 2008-01-25 22:17:08 +0100 | [diff] [blame] | 1151 | if (hwif->resetproc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | hwif->resetproc(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | |
| 1154 | spin_unlock_irqrestore(&ide_lock, flags); |
| 1155 | return ide_started; |
| 1156 | } |
| 1157 | |
| 1158 | /* |
| 1159 | * ide_do_reset() is the entry point to the drive/interface reset code. |
| 1160 | */ |
| 1161 | |
| 1162 | ide_startstop_t ide_do_reset (ide_drive_t *drive) |
| 1163 | { |
| 1164 | return do_reset1(drive, 0); |
| 1165 | } |
| 1166 | |
| 1167 | EXPORT_SYMBOL(ide_do_reset); |
| 1168 | |
| 1169 | /* |
| 1170 | * ide_wait_not_busy() waits for the currently selected device on the hwif |
| 1171 | * to report a non-busy status, see comments in probe_hwif(). |
| 1172 | */ |
| 1173 | int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) |
| 1174 | { |
| 1175 | u8 stat = 0; |
| 1176 | |
| 1177 | while(timeout--) { |
| 1178 | /* |
| 1179 | * Turn this into a schedule() sleep once I'm sure |
| 1180 | * about locking issues (2.5 work ?). |
| 1181 | */ |
| 1182 | mdelay(1); |
| 1183 | stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]); |
| 1184 | if ((stat & BUSY_STAT) == 0) |
| 1185 | return 0; |
| 1186 | /* |
| 1187 | * Assume a value of 0xff means nothing is connected to |
| 1188 | * the interface and it doesn't implement the pull-down |
| 1189 | * resistor on D7. |
| 1190 | */ |
| 1191 | if (stat == 0xff) |
| 1192 | return -ENODEV; |
Ingo Molnar | 6842f8c | 2006-02-03 03:04:55 -0800 | [diff] [blame] | 1193 | touch_softlockup_watchdog(); |
Michal Schmidt | 1e86240 | 2006-07-30 03:03:29 -0700 | [diff] [blame] | 1194 | touch_nmi_watchdog(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | } |
| 1196 | return -EBUSY; |
| 1197 | } |
| 1198 | |
| 1199 | EXPORT_SYMBOL_GPL(ide_wait_not_busy); |
| 1200 | |