Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/ide/ide-probe.c Version 1.11 Mar 05, 2003 |
| 3 | * |
| 4 | * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) |
| 5 | */ |
| 6 | |
| 7 | /* |
| 8 | * Mostly written by Mark Lord <mlord@pobox.com> |
| 9 | * and Gadi Oxman <gadio@netvision.net.il> |
| 10 | * and Andre Hedrick <andre@linux-ide.org> |
| 11 | * |
| 12 | * See linux/MAINTAINERS for address of current maintainer. |
| 13 | * |
| 14 | * This is the IDE probe module, as evolved from hd.c and ide.c. |
| 15 | * |
| 16 | * Version 1.00 move drive probing code from ide.c to ide-probe.c |
| 17 | * Version 1.01 fix compilation problem for m68k |
| 18 | * Version 1.02 increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot |
| 19 | * by Andrea Arcangeli |
| 20 | * Version 1.03 fix for (hwif->chipset == ide_4drives) |
| 21 | * Version 1.04 fixed buggy treatments of known flash memory cards |
| 22 | * |
| 23 | * Version 1.05 fix for (hwif->chipset == ide_pdc4030) |
| 24 | * added ide6/7/8/9 |
| 25 | * allowed for secondary flash card to be detectable |
| 26 | * with new flag : drive->ata_flash : 1; |
| 27 | * Version 1.06 stream line request queue and prep for cascade project. |
| 28 | * Version 1.07 max_sect <= 255; slower disks would get behind and |
| 29 | * then fall over when they get to 256. Paul G. |
| 30 | * Version 1.10 Update set for new IDE. drive->id is now always |
| 31 | * valid after probe time even with noprobe |
| 32 | */ |
| 33 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/module.h> |
| 35 | #include <linux/types.h> |
| 36 | #include <linux/string.h> |
| 37 | #include <linux/kernel.h> |
| 38 | #include <linux/timer.h> |
| 39 | #include <linux/mm.h> |
| 40 | #include <linux/interrupt.h> |
| 41 | #include <linux/major.h> |
| 42 | #include <linux/errno.h> |
| 43 | #include <linux/genhd.h> |
| 44 | #include <linux/slab.h> |
| 45 | #include <linux/delay.h> |
| 46 | #include <linux/ide.h> |
| 47 | #include <linux/spinlock.h> |
| 48 | #include <linux/kmod.h> |
| 49 | #include <linux/pci.h> |
FUJITA Tomonori | dc81785 | 2007-10-23 09:29:58 +0200 | [diff] [blame] | 50 | #include <linux/scatterlist.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
| 52 | #include <asm/byteorder.h> |
| 53 | #include <asm/irq.h> |
| 54 | #include <asm/uaccess.h> |
| 55 | #include <asm/io.h> |
| 56 | |
| 57 | /** |
| 58 | * generic_id - add a generic drive id |
| 59 | * @drive: drive to make an ID block for |
| 60 | * |
| 61 | * Add a fake id field to the drive we are passed. This allows |
| 62 | * use to skip a ton of NULL checks (which people always miss) |
| 63 | * and make drive properties unconditional outside of this file |
| 64 | */ |
| 65 | |
| 66 | static void generic_id(ide_drive_t *drive) |
| 67 | { |
| 68 | drive->id->cyls = drive->cyl; |
| 69 | drive->id->heads = drive->head; |
| 70 | drive->id->sectors = drive->sect; |
| 71 | drive->id->cur_cyls = drive->cyl; |
| 72 | drive->id->cur_heads = drive->head; |
| 73 | drive->id->cur_sectors = drive->sect; |
| 74 | } |
| 75 | |
| 76 | static void ide_disk_init_chs(ide_drive_t *drive) |
| 77 | { |
| 78 | struct hd_driveid *id = drive->id; |
| 79 | |
| 80 | /* Extract geometry if we did not already have one for the drive */ |
| 81 | if (!drive->cyl || !drive->head || !drive->sect) { |
| 82 | drive->cyl = drive->bios_cyl = id->cyls; |
| 83 | drive->head = drive->bios_head = id->heads; |
| 84 | drive->sect = drive->bios_sect = id->sectors; |
| 85 | } |
| 86 | |
| 87 | /* Handle logical geometry translation by the drive */ |
| 88 | if ((id->field_valid & 1) && id->cur_cyls && |
| 89 | id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) { |
| 90 | drive->cyl = id->cur_cyls; |
| 91 | drive->head = id->cur_heads; |
| 92 | drive->sect = id->cur_sectors; |
| 93 | } |
| 94 | |
| 95 | /* Use physical geometry if what we have still makes no sense */ |
| 96 | if (drive->head > 16 && id->heads && id->heads <= 16) { |
| 97 | drive->cyl = id->cyls; |
| 98 | drive->head = id->heads; |
| 99 | drive->sect = id->sectors; |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | static void ide_disk_init_mult_count(ide_drive_t *drive) |
| 104 | { |
| 105 | struct hd_driveid *id = drive->id; |
| 106 | |
| 107 | drive->mult_count = 0; |
| 108 | if (id->max_multsect) { |
| 109 | #ifdef CONFIG_IDEDISK_MULTI_MODE |
| 110 | id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0; |
| 111 | id->multsect_valid = id->multsect ? 1 : 0; |
| 112 | drive->mult_req = id->multsect_valid ? id->max_multsect : INITIAL_MULT_COUNT; |
| 113 | drive->special.b.set_multmode = drive->mult_req ? 1 : 0; |
| 114 | #else /* original, pre IDE-NFG, per request of AC */ |
| 115 | drive->mult_req = INITIAL_MULT_COUNT; |
| 116 | if (drive->mult_req > id->max_multsect) |
| 117 | drive->mult_req = id->max_multsect; |
| 118 | if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect)) |
| 119 | drive->special.b.set_multmode = 1; |
| 120 | #endif |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | * do_identify - identify a drive |
| 126 | * @drive: drive to identify |
| 127 | * @cmd: command used |
| 128 | * |
| 129 | * Called when we have issued a drive identify command to |
| 130 | * read and parse the results. This function is run with |
| 131 | * interrupts disabled. |
| 132 | */ |
| 133 | |
| 134 | static inline void do_identify (ide_drive_t *drive, u8 cmd) |
| 135 | { |
| 136 | ide_hwif_t *hwif = HWIF(drive); |
| 137 | int bswap = 1; |
| 138 | struct hd_driveid *id; |
| 139 | |
| 140 | id = drive->id; |
| 141 | /* read 512 bytes of id info */ |
| 142 | hwif->ata_input_data(drive, id, SECTOR_WORDS); |
| 143 | |
| 144 | drive->id_read = 1; |
| 145 | local_irq_enable(); |
| 146 | ide_fix_driveid(id); |
| 147 | |
Robert P. J. Day | e71bc14 | 2007-07-09 23:17:57 +0200 | [diff] [blame] | 148 | #if defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | /* |
| 150 | * EATA SCSI controllers do a hardware ATA emulation: |
| 151 | * Ignore them if there is a driver for them available. |
| 152 | */ |
| 153 | if ((id->model[0] == 'P' && id->model[1] == 'M') || |
| 154 | (id->model[0] == 'S' && id->model[1] == 'K')) { |
| 155 | printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model); |
| 156 | goto err_misc; |
| 157 | } |
Robert P. J. Day | e71bc14 | 2007-07-09 23:17:57 +0200 | [diff] [blame] | 158 | #endif /* CONFIG_SCSI_EATA || CONFIG_SCSI_EATA_PIO */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
| 160 | /* |
| 161 | * WIN_IDENTIFY returns little-endian info, |
| 162 | * WIN_PIDENTIFY *usually* returns little-endian info. |
| 163 | */ |
| 164 | if (cmd == WIN_PIDENTIFY) { |
| 165 | if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */ |
| 166 | || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */ |
| 167 | || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */ |
| 168 | /* Vertos drives may still be weird */ |
| 169 | bswap ^= 1; |
| 170 | } |
| 171 | ide_fixstring(id->model, sizeof(id->model), bswap); |
| 172 | ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap); |
| 173 | ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap); |
| 174 | |
Tejun Heo | 699b052 | 2007-11-05 21:42:25 +0100 | [diff] [blame] | 175 | /* we depend on this a lot! */ |
| 176 | id->model[sizeof(id->model)-1] = '\0'; |
| 177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | if (strstr(id->model, "E X A B Y T E N E S T")) |
| 179 | goto err_misc; |
| 180 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | printk("%s: %s, ", drive->name, id->model); |
| 182 | drive->present = 1; |
| 183 | drive->dead = 0; |
| 184 | |
| 185 | /* |
| 186 | * Check for an ATAPI device |
| 187 | */ |
| 188 | if (cmd == WIN_PIDENTIFY) { |
| 189 | u8 type = (id->config >> 8) & 0x1f; |
| 190 | printk("ATAPI "); |
| 191 | switch (type) { |
| 192 | case ide_floppy: |
| 193 | if (!strstr(id->model, "CD-ROM")) { |
| 194 | if (!strstr(id->model, "oppy") && |
| 195 | !strstr(id->model, "poyp") && |
| 196 | !strstr(id->model, "ZIP")) |
| 197 | printk("cdrom or floppy?, assuming "); |
| 198 | if (drive->media != ide_cdrom) { |
| 199 | printk ("FLOPPY"); |
| 200 | drive->removable = 1; |
| 201 | break; |
| 202 | } |
| 203 | } |
| 204 | /* Early cdrom models used zero */ |
| 205 | type = ide_cdrom; |
| 206 | case ide_cdrom: |
| 207 | drive->removable = 1; |
| 208 | #ifdef CONFIG_PPC |
| 209 | /* kludge for Apple PowerBook internal zip */ |
| 210 | if (!strstr(id->model, "CD-ROM") && |
| 211 | strstr(id->model, "ZIP")) { |
| 212 | printk ("FLOPPY"); |
| 213 | type = ide_floppy; |
| 214 | break; |
| 215 | } |
| 216 | #endif |
| 217 | printk ("CD/DVD-ROM"); |
| 218 | break; |
| 219 | case ide_tape: |
| 220 | printk ("TAPE"); |
| 221 | break; |
| 222 | case ide_optical: |
| 223 | printk ("OPTICAL"); |
| 224 | drive->removable = 1; |
| 225 | break; |
| 226 | default: |
| 227 | printk("UNKNOWN (type %d)", type); |
| 228 | break; |
| 229 | } |
| 230 | printk (" drive\n"); |
| 231 | drive->media = type; |
| 232 | /* an ATAPI device ignores DRDY */ |
| 233 | drive->ready_stat = 0; |
| 234 | return; |
| 235 | } |
| 236 | |
| 237 | /* |
| 238 | * Not an ATAPI device: looks like a "regular" hard disk |
| 239 | */ |
Richard Purdie | 9810933 | 2006-02-03 03:04:55 -0800 | [diff] [blame] | 240 | |
| 241 | /* |
| 242 | * 0x848a = CompactFlash device |
| 243 | * These are *not* removable in Linux definition of the term |
| 244 | */ |
| 245 | |
| 246 | if ((id->config != 0x848a) && (id->config & (1<<7))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | drive->removable = 1; |
| 248 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | drive->media = ide_disk; |
Richard Purdie | 9810933 | 2006-02-03 03:04:55 -0800 | [diff] [blame] | 250 | printk("%s DISK drive\n", (id->config == 0x848a) ? "CFA" : "ATA" ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | QUIRK_LIST(drive); |
| 252 | return; |
| 253 | |
| 254 | err_misc: |
| 255 | kfree(id); |
| 256 | drive->present = 0; |
| 257 | return; |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * actual_try_to_identify - send ata/atapi identify |
| 262 | * @drive: drive to identify |
| 263 | * @cmd: command to use |
| 264 | * |
| 265 | * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive |
| 266 | * and waits for a response. It also monitors irqs while this is |
| 267 | * happening, in hope of automatically determining which one is |
| 268 | * being used by the interface. |
| 269 | * |
| 270 | * Returns: 0 device was identified |
| 271 | * 1 device timed-out (no response to identify request) |
| 272 | * 2 device aborted the command (refused to identify itself) |
| 273 | */ |
| 274 | |
| 275 | static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) |
| 276 | { |
| 277 | ide_hwif_t *hwif = HWIF(drive); |
| 278 | int rc; |
| 279 | unsigned long hd_status; |
| 280 | unsigned long timeout; |
| 281 | u8 s = 0, a = 0; |
| 282 | |
| 283 | /* take a deep breath */ |
| 284 | msleep(50); |
| 285 | |
| 286 | if (IDE_CONTROL_REG) { |
| 287 | a = hwif->INB(IDE_ALTSTATUS_REG); |
| 288 | s = hwif->INB(IDE_STATUS_REG); |
| 289 | if ((a ^ s) & ~INDEX_STAT) { |
| 290 | printk(KERN_INFO "%s: probing with STATUS(0x%02x) instead of " |
| 291 | "ALTSTATUS(0x%02x)\n", drive->name, s, a); |
| 292 | /* ancient Seagate drives, broken interfaces */ |
| 293 | hd_status = IDE_STATUS_REG; |
| 294 | } else { |
| 295 | /* use non-intrusive polling */ |
| 296 | hd_status = IDE_ALTSTATUS_REG; |
| 297 | } |
| 298 | } else |
| 299 | hd_status = IDE_STATUS_REG; |
| 300 | |
| 301 | /* set features register for atapi |
| 302 | * identify command to be sure of reply |
| 303 | */ |
| 304 | if ((cmd == WIN_PIDENTIFY)) |
| 305 | /* disable dma & overlap */ |
| 306 | hwif->OUTB(0, IDE_FEATURE_REG); |
| 307 | |
| 308 | /* ask drive for ID */ |
| 309 | hwif->OUTB(cmd, IDE_COMMAND_REG); |
| 310 | |
| 311 | timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; |
| 312 | timeout += jiffies; |
| 313 | do { |
| 314 | if (time_after(jiffies, timeout)) { |
| 315 | /* drive timed-out */ |
| 316 | return 1; |
| 317 | } |
| 318 | /* give drive a breather */ |
| 319 | msleep(50); |
| 320 | } while ((hwif->INB(hd_status)) & BUSY_STAT); |
| 321 | |
| 322 | /* wait for IRQ and DRQ_STAT */ |
| 323 | msleep(50); |
| 324 | if (OK_STAT((hwif->INB(IDE_STATUS_REG)), DRQ_STAT, BAD_R_STAT)) { |
| 325 | unsigned long flags; |
| 326 | |
| 327 | /* local CPU only; some systems need this */ |
| 328 | local_irq_save(flags); |
| 329 | /* drive returned ID */ |
| 330 | do_identify(drive, cmd); |
| 331 | /* drive responded with ID */ |
| 332 | rc = 0; |
| 333 | /* clear drive IRQ */ |
| 334 | (void) hwif->INB(IDE_STATUS_REG); |
| 335 | local_irq_restore(flags); |
| 336 | } else { |
| 337 | /* drive refused ID */ |
| 338 | rc = 2; |
| 339 | } |
| 340 | return rc; |
| 341 | } |
| 342 | |
| 343 | /** |
| 344 | * try_to_identify - try to identify a drive |
| 345 | * @drive: drive to probe |
| 346 | * @cmd: command to use |
| 347 | * |
| 348 | * Issue the identify command and then do IRQ probing to |
| 349 | * complete the identification when needed by finding the |
| 350 | * IRQ the drive is attached to |
| 351 | */ |
| 352 | |
| 353 | static int try_to_identify (ide_drive_t *drive, u8 cmd) |
| 354 | { |
| 355 | ide_hwif_t *hwif = HWIF(drive); |
| 356 | int retval; |
| 357 | int autoprobe = 0; |
| 358 | unsigned long cookie = 0; |
| 359 | |
| 360 | /* |
| 361 | * Disable device irq unless we need to |
| 362 | * probe for it. Otherwise we'll get spurious |
| 363 | * interrupts during the identify-phase that |
| 364 | * the irq handler isn't expecting. |
| 365 | */ |
| 366 | if (IDE_CONTROL_REG) { |
| 367 | u8 ctl = drive->ctl | 2; |
| 368 | if (!hwif->irq) { |
| 369 | autoprobe = 1; |
| 370 | cookie = probe_irq_on(); |
| 371 | /* enable device irq */ |
| 372 | ctl &= ~2; |
| 373 | } |
| 374 | hwif->OUTB(ctl, IDE_CONTROL_REG); |
| 375 | } |
| 376 | |
| 377 | retval = actual_try_to_identify(drive, cmd); |
| 378 | |
| 379 | if (autoprobe) { |
| 380 | int irq; |
| 381 | /* mask device irq */ |
| 382 | hwif->OUTB(drive->ctl|2, IDE_CONTROL_REG); |
| 383 | /* clear drive IRQ */ |
| 384 | (void) hwif->INB(IDE_STATUS_REG); |
| 385 | udelay(5); |
| 386 | irq = probe_irq_off(cookie); |
| 387 | if (!hwif->irq) { |
| 388 | if (irq > 0) { |
| 389 | hwif->irq = irq; |
| 390 | } else { |
| 391 | /* Mmmm.. multiple IRQs.. |
| 392 | * don't know which was ours |
| 393 | */ |
| 394 | printk("%s: IRQ probe failed (0x%lx)\n", |
| 395 | drive->name, cookie); |
| 396 | } |
| 397 | } |
| 398 | } |
| 399 | return retval; |
| 400 | } |
| 401 | |
| 402 | |
| 403 | /** |
| 404 | * do_probe - probe an IDE device |
| 405 | * @drive: drive to probe |
| 406 | * @cmd: command to use |
| 407 | * |
| 408 | * do_probe() has the difficult job of finding a drive if it exists, |
| 409 | * without getting hung up if it doesn't exist, without trampling on |
| 410 | * ethernet cards, and without leaving any IRQs dangling to haunt us later. |
| 411 | * |
| 412 | * If a drive is "known" to exist (from CMOS or kernel parameters), |
| 413 | * but does not respond right away, the probe will "hang in there" |
| 414 | * for the maximum wait time (about 30 seconds), otherwise it will |
| 415 | * exit much more quickly. |
| 416 | * |
| 417 | * Returns: 0 device was identified |
| 418 | * 1 device timed-out (no response to identify request) |
| 419 | * 2 device aborted the command (refused to identify itself) |
| 420 | * 3 bad status from device (possible for ATAPI drives) |
| 421 | * 4 probe was not attempted because failure was obvious |
| 422 | */ |
| 423 | |
| 424 | static int do_probe (ide_drive_t *drive, u8 cmd) |
| 425 | { |
| 426 | int rc; |
| 427 | ide_hwif_t *hwif = HWIF(drive); |
| 428 | |
| 429 | if (drive->present) { |
| 430 | /* avoid waiting for inappropriate probes */ |
| 431 | if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY)) |
| 432 | return 4; |
| 433 | } |
| 434 | #ifdef DEBUG |
| 435 | printk("probing for %s: present=%d, media=%d, probetype=%s\n", |
| 436 | drive->name, drive->present, drive->media, |
| 437 | (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); |
| 438 | #endif |
| 439 | |
| 440 | /* needed for some systems |
| 441 | * (e.g. crw9624 as drive0 with disk as slave) |
| 442 | */ |
| 443 | msleep(50); |
| 444 | SELECT_DRIVE(drive); |
| 445 | msleep(50); |
| 446 | if (hwif->INB(IDE_SELECT_REG) != drive->select.all && !drive->present) { |
| 447 | if (drive->select.b.unit != 0) { |
| 448 | /* exit with drive0 selected */ |
| 449 | SELECT_DRIVE(&hwif->drives[0]); |
| 450 | /* allow BUSY_STAT to assert & clear */ |
| 451 | msleep(50); |
| 452 | } |
| 453 | /* no i/f present: mmm.. this should be a 4 -ml */ |
| 454 | return 3; |
| 455 | } |
| 456 | |
| 457 | if (OK_STAT((hwif->INB(IDE_STATUS_REG)), READY_STAT, BUSY_STAT) || |
| 458 | drive->present || cmd == WIN_PIDENTIFY) { |
| 459 | /* send cmd and wait */ |
| 460 | if ((rc = try_to_identify(drive, cmd))) { |
| 461 | /* failed: try again */ |
| 462 | rc = try_to_identify(drive,cmd); |
| 463 | } |
| 464 | if (hwif->INB(IDE_STATUS_REG) == (BUSY_STAT|READY_STAT)) |
| 465 | return 4; |
| 466 | |
| 467 | if ((rc == 1 && cmd == WIN_PIDENTIFY) && |
| 468 | ((drive->autotune == IDE_TUNE_DEFAULT) || |
| 469 | (drive->autotune == IDE_TUNE_AUTO))) { |
| 470 | unsigned long timeout; |
| 471 | printk("%s: no response (status = 0x%02x), " |
| 472 | "resetting drive\n", drive->name, |
| 473 | hwif->INB(IDE_STATUS_REG)); |
| 474 | msleep(50); |
| 475 | hwif->OUTB(drive->select.all, IDE_SELECT_REG); |
| 476 | msleep(50); |
| 477 | hwif->OUTB(WIN_SRST, IDE_COMMAND_REG); |
| 478 | timeout = jiffies; |
| 479 | while (((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && |
| 480 | time_before(jiffies, timeout + WAIT_WORSTCASE)) |
| 481 | msleep(50); |
| 482 | rc = try_to_identify(drive, cmd); |
| 483 | } |
| 484 | if (rc == 1) |
| 485 | printk("%s: no response (status = 0x%02x)\n", |
| 486 | drive->name, hwif->INB(IDE_STATUS_REG)); |
| 487 | /* ensure drive irq is clear */ |
| 488 | (void) hwif->INB(IDE_STATUS_REG); |
| 489 | } else { |
| 490 | /* not present or maybe ATAPI */ |
| 491 | rc = 3; |
| 492 | } |
| 493 | if (drive->select.b.unit != 0) { |
| 494 | /* exit with drive0 selected */ |
| 495 | SELECT_DRIVE(&hwif->drives[0]); |
| 496 | msleep(50); |
| 497 | /* ensure drive irq is clear */ |
| 498 | (void) hwif->INB(IDE_STATUS_REG); |
| 499 | } |
| 500 | return rc; |
| 501 | } |
| 502 | |
| 503 | /* |
| 504 | * |
| 505 | */ |
| 506 | static void enable_nest (ide_drive_t *drive) |
| 507 | { |
| 508 | ide_hwif_t *hwif = HWIF(drive); |
| 509 | unsigned long timeout; |
| 510 | |
| 511 | printk("%s: enabling %s -- ", hwif->name, drive->id->model); |
| 512 | SELECT_DRIVE(drive); |
| 513 | msleep(50); |
| 514 | hwif->OUTB(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG); |
| 515 | timeout = jiffies + WAIT_WORSTCASE; |
| 516 | do { |
| 517 | if (time_after(jiffies, timeout)) { |
| 518 | printk("failed (timeout)\n"); |
| 519 | return; |
| 520 | } |
| 521 | msleep(50); |
| 522 | } while ((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT); |
| 523 | |
| 524 | msleep(50); |
| 525 | |
| 526 | if (!OK_STAT((hwif->INB(IDE_STATUS_REG)), 0, BAD_STAT)) { |
| 527 | printk("failed (status = 0x%02x)\n", hwif->INB(IDE_STATUS_REG)); |
| 528 | } else { |
| 529 | printk("success\n"); |
| 530 | } |
| 531 | |
| 532 | /* if !(success||timed-out) */ |
| 533 | if (do_probe(drive, WIN_IDENTIFY) >= 2) { |
| 534 | /* look for ATAPI device */ |
| 535 | (void) do_probe(drive, WIN_PIDENTIFY); |
| 536 | } |
| 537 | } |
| 538 | |
| 539 | /** |
| 540 | * probe_for_drives - upper level drive probe |
| 541 | * @drive: drive to probe for |
| 542 | * |
| 543 | * probe_for_drive() tests for existence of a given drive using do_probe() |
| 544 | * and presents things to the user as needed. |
| 545 | * |
| 546 | * Returns: 0 no device was found |
| 547 | * 1 device was found (note: drive->present might |
| 548 | * still be 0) |
| 549 | */ |
| 550 | |
| 551 | static inline u8 probe_for_drive (ide_drive_t *drive) |
| 552 | { |
| 553 | /* |
| 554 | * In order to keep things simple we have an id |
| 555 | * block for all drives at all times. If the device |
| 556 | * is pre ATA or refuses ATA/ATAPI identify we |
| 557 | * will add faked data to this. |
| 558 | * |
| 559 | * Also note that 0 everywhere means "can't do X" |
| 560 | */ |
| 561 | |
Deepak Saxena | f5e3c2f | 2005-11-07 01:01:25 -0800 | [diff] [blame] | 562 | drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | drive->id_read = 0; |
| 564 | if(drive->id == NULL) |
| 565 | { |
| 566 | printk(KERN_ERR "ide: out of memory for id data.\n"); |
| 567 | return 0; |
| 568 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | strcpy(drive->id->model, "UNKNOWN"); |
| 570 | |
| 571 | /* skip probing? */ |
| 572 | if (!drive->noprobe) |
| 573 | { |
| 574 | /* if !(success||timed-out) */ |
| 575 | if (do_probe(drive, WIN_IDENTIFY) >= 2) { |
| 576 | /* look for ATAPI device */ |
| 577 | (void) do_probe(drive, WIN_PIDENTIFY); |
| 578 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | if (!drive->present) |
| 580 | /* drive not found */ |
| 581 | return 0; |
Alan Cox | 7859557 | 2007-07-03 22:28:35 +0200 | [diff] [blame] | 582 | if (strstr(drive->id->model, "E X A B Y T E N E S T")) |
| 583 | enable_nest(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | |
| 585 | /* identification failed? */ |
| 586 | if (!drive->id_read) { |
| 587 | if (drive->media == ide_disk) { |
| 588 | printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", |
| 589 | drive->name, drive->cyl, |
| 590 | drive->head, drive->sect); |
| 591 | } else if (drive->media == ide_cdrom) { |
| 592 | printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); |
| 593 | } else { |
| 594 | /* nuke it */ |
| 595 | printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); |
| 596 | drive->present = 0; |
| 597 | } |
| 598 | } |
| 599 | /* drive was found */ |
| 600 | } |
| 601 | if(!drive->present) |
| 602 | return 0; |
| 603 | /* The drive wasn't being helpful. Add generic info only */ |
| 604 | if (drive->id_read == 0) { |
| 605 | generic_id(drive); |
| 606 | return 1; |
| 607 | } |
| 608 | |
| 609 | if (drive->media == ide_disk) { |
| 610 | ide_disk_init_chs(drive); |
| 611 | ide_disk_init_mult_count(drive); |
| 612 | } |
| 613 | |
| 614 | return drive->present; |
| 615 | } |
| 616 | |
| 617 | static void hwif_release_dev (struct device *dev) |
| 618 | { |
| 619 | ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); |
| 620 | |
Aleksey Makarov | f36d402 | 2006-01-09 15:59:27 -0800 | [diff] [blame] | 621 | complete(&hwif->gendev_rel_comp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | } |
| 623 | |
| 624 | static void hwif_register (ide_hwif_t *hwif) |
| 625 | { |
Randy Dunlap | 349ae23 | 2006-10-03 01:14:23 -0700 | [diff] [blame] | 626 | int ret; |
| 627 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | /* register with global device tree */ |
| 629 | strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); |
| 630 | hwif->gendev.driver_data = hwif; |
| 631 | if (hwif->gendev.parent == NULL) { |
| 632 | if (hwif->pci_dev) |
| 633 | hwif->gendev.parent = &hwif->pci_dev->dev; |
| 634 | else |
| 635 | /* Would like to do = &device_legacy */ |
| 636 | hwif->gendev.parent = NULL; |
| 637 | } |
| 638 | hwif->gendev.release = hwif_release_dev; |
Randy Dunlap | 349ae23 | 2006-10-03 01:14:23 -0700 | [diff] [blame] | 639 | ret = device_register(&hwif->gendev); |
| 640 | if (ret < 0) |
| 641 | printk(KERN_WARNING "IDE: %s: device_register error: %d\n", |
| 642 | __FUNCTION__, ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | } |
| 644 | |
| 645 | static int wait_hwif_ready(ide_hwif_t *hwif) |
| 646 | { |
Jonas Stare | 8266105 | 2007-11-27 21:35:53 +0100 | [diff] [blame] | 647 | int unit, rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | |
| 649 | printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); |
| 650 | |
| 651 | /* Let HW settle down a bit from whatever init state we |
| 652 | * come from */ |
| 653 | mdelay(2); |
| 654 | |
| 655 | /* Wait for BSY bit to go away, spec timeout is 30 seconds, |
| 656 | * I know of at least one disk who takes 31 seconds, I use 35 |
| 657 | * here to be safe |
| 658 | */ |
| 659 | rc = ide_wait_not_busy(hwif, 35000); |
| 660 | if (rc) |
| 661 | return rc; |
| 662 | |
| 663 | /* Now make sure both master & slave are ready */ |
Jonas Stare | 8266105 | 2007-11-27 21:35:53 +0100 | [diff] [blame] | 664 | for (unit = 0; unit < MAX_DRIVES; unit++) { |
| 665 | ide_drive_t *drive = &hwif->drives[unit]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | |
Jonas Stare | 8266105 | 2007-11-27 21:35:53 +0100 | [diff] [blame] | 667 | /* Ignore disks that we will not probe for later. */ |
| 668 | if (!drive->noprobe || drive->present) { |
| 669 | SELECT_DRIVE(drive); |
Bartlomiej Zolnierkiewicz | ad0e74d | 2007-12-12 23:31:57 +0100 | [diff] [blame] | 670 | if (IDE_CONTROL_REG) |
| 671 | hwif->OUTB(drive->ctl, IDE_CONTROL_REG); |
Jonas Stare | 8266105 | 2007-11-27 21:35:53 +0100 | [diff] [blame] | 672 | mdelay(2); |
| 673 | rc = ide_wait_not_busy(hwif, 35000); |
| 674 | if (rc) |
| 675 | goto out; |
| 676 | } else |
| 677 | printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", |
| 678 | drive->name); |
| 679 | } |
| 680 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | /* Exit function with master reselected (let's be sane) */ |
Jonas Stare | 8266105 | 2007-11-27 21:35:53 +0100 | [diff] [blame] | 682 | if (unit) |
| 683 | SELECT_DRIVE(&hwif->drives[0]); |
| 684 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | return rc; |
| 686 | } |
| 687 | |
| 688 | /** |
| 689 | * ide_undecoded_slave - look for bad CF adapters |
| 690 | * @hwif: interface |
| 691 | * |
| 692 | * Analyse the drives on the interface and attempt to decide if we |
| 693 | * have the same drive viewed twice. This occurs with crap CF adapters |
| 694 | * and PCMCIA sometimes. |
| 695 | */ |
| 696 | |
| 697 | void ide_undecoded_slave(ide_hwif_t *hwif) |
| 698 | { |
| 699 | ide_drive_t *drive0 = &hwif->drives[0]; |
| 700 | ide_drive_t *drive1 = &hwif->drives[1]; |
| 701 | |
| 702 | if (drive0->present == 0 || drive1->present == 0) |
| 703 | return; |
| 704 | |
| 705 | /* If the models don't match they are not the same product */ |
| 706 | if (strcmp(drive0->id->model, drive1->id->model)) |
| 707 | return; |
| 708 | |
| 709 | /* Serial numbers do not match */ |
| 710 | if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20)) |
| 711 | return; |
| 712 | |
| 713 | /* No serial number, thankfully very rare for CF */ |
| 714 | if (drive0->id->serial_no[0] == 0) |
| 715 | return; |
| 716 | |
| 717 | /* Appears to be an IDE flash adapter with decode bugs */ |
| 718 | printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); |
| 719 | |
| 720 | drive1->present = 0; |
| 721 | } |
| 722 | |
| 723 | EXPORT_SYMBOL_GPL(ide_undecoded_slave); |
| 724 | |
| 725 | /* |
| 726 | * This routine only knows how to look for drive units 0 and 1 |
| 727 | * on an interface, so any setting of MAX_DRIVES > 2 won't work here. |
| 728 | */ |
Bartlomiej Zolnierkiewicz | fd9bb53 | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 729 | static void probe_hwif(ide_hwif_t *hwif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | unsigned long flags; |
| 732 | unsigned int irqd; |
Bartlomiej Zolnierkiewicz | b140b99 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 733 | int unit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | |
| 735 | if (hwif->noprobe) |
| 736 | return; |
| 737 | |
| 738 | if ((hwif->chipset != ide_4drives || !hwif->mate || !hwif->mate->present) && |
| 739 | (ide_hwif_request_regions(hwif))) { |
| 740 | u16 msgout = 0; |
| 741 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
| 742 | ide_drive_t *drive = &hwif->drives[unit]; |
| 743 | if (drive->present) { |
| 744 | drive->present = 0; |
| 745 | printk(KERN_ERR "%s: ERROR, PORTS ALREADY IN USE\n", |
| 746 | drive->name); |
| 747 | msgout = 1; |
| 748 | } |
| 749 | } |
| 750 | if (!msgout) |
| 751 | printk(KERN_ERR "%s: ports already in use, skipping probe\n", |
| 752 | hwif->name); |
| 753 | return; |
| 754 | } |
| 755 | |
| 756 | /* |
| 757 | * We must always disable IRQ, as probe_for_drive will assert IRQ, but |
| 758 | * we'll install our IRQ driver much later... |
| 759 | */ |
| 760 | irqd = hwif->irq; |
| 761 | if (irqd) |
| 762 | disable_irq(hwif->irq); |
| 763 | |
| 764 | local_irq_set(flags); |
| 765 | |
| 766 | /* This is needed on some PPCs and a bunch of BIOS-less embedded |
| 767 | * platforms. Typical cases are: |
| 768 | * |
| 769 | * - The firmware hard reset the disk before booting the kernel, |
| 770 | * the drive is still doing it's poweron-reset sequence, that |
| 771 | * can take up to 30 seconds |
| 772 | * - The firmware does nothing (or no firmware), the device is |
| 773 | * still in POST state (same as above actually). |
| 774 | * - Some CD/DVD/Writer combo drives tend to drive the bus during |
| 775 | * their reset sequence even when they are non-selected slave |
| 776 | * devices, thus preventing discovery of the main HD |
| 777 | * |
| 778 | * Doing this wait-for-busy should not harm any existing configuration |
| 779 | * (at least things won't be worse than what current code does, that |
| 780 | * is blindly go & talk to the drive) and fix some issues like the |
| 781 | * above. |
| 782 | * |
| 783 | * BenH. |
| 784 | */ |
| 785 | if (wait_hwif_ready(hwif) == -EBUSY) |
| 786 | printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); |
| 787 | |
| 788 | /* |
Bartlomiej Zolnierkiewicz | b140b99 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 789 | * Need to probe slave device first to make it release PDIAG-. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | */ |
Bartlomiej Zolnierkiewicz | b140b99 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 791 | for (unit = MAX_DRIVES - 1; unit >= 0; unit--) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | ide_drive_t *drive = &hwif->drives[unit]; |
| 793 | drive->dn = (hwif->channel ? 2 : 0) + unit; |
| 794 | (void) probe_for_drive(drive); |
| 795 | if (drive->present && !hwif->present) { |
| 796 | hwif->present = 1; |
| 797 | if (hwif->chipset != ide_4drives || |
| 798 | !hwif->mate || |
| 799 | !hwif->mate->present) { |
| 800 | hwif_register(hwif); |
| 801 | } |
| 802 | } |
| 803 | } |
| 804 | if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) { |
| 805 | unsigned long timeout = jiffies + WAIT_WORSTCASE; |
| 806 | u8 stat; |
| 807 | |
| 808 | printk(KERN_WARNING "%s: reset\n", hwif->name); |
| 809 | hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]); |
| 810 | udelay(10); |
| 811 | hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); |
| 812 | do { |
| 813 | msleep(50); |
| 814 | stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]); |
| 815 | } while ((stat & BUSY_STAT) && time_after(timeout, jiffies)); |
| 816 | |
| 817 | } |
| 818 | local_irq_restore(flags); |
| 819 | /* |
| 820 | * Use cached IRQ number. It might be (and is...) changed by probe |
| 821 | * code above |
| 822 | */ |
| 823 | if (irqd) |
| 824 | enable_irq(irqd); |
| 825 | |
| 826 | if (!hwif->present) { |
| 827 | ide_hwif_release_regions(hwif); |
| 828 | return; |
| 829 | } |
| 830 | |
Bartlomiej Zolnierkiewicz | fd9bb53 | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 831 | if (hwif->fixup) |
| 832 | hwif->fixup(hwif); |
Bartlomiej Zolnierkiewicz | 0380dad | 2007-06-08 15:14:29 +0200 | [diff] [blame] | 833 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
| 835 | ide_drive_t *drive = &hwif->drives[unit]; |
| 836 | |
| 837 | if (drive->present) { |
Bartlomiej Zolnierkiewicz | 26bcb87 | 2007-10-11 23:54:00 +0200 | [diff] [blame] | 838 | if (drive->autotune == IDE_TUNE_AUTO) |
| 839 | ide_set_max_pio(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | |
| 841 | if (drive->autotune != IDE_TUNE_DEFAULT && |
| 842 | drive->autotune != IDE_TUNE_AUTO) |
| 843 | continue; |
| 844 | |
| 845 | drive->nice1 = 1; |
| 846 | |
Bartlomiej Zolnierkiewicz | 0ae2e17 | 2007-10-16 22:29:55 +0200 | [diff] [blame] | 847 | if (hwif->ide_dma_on) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | /* |
| 849 | * Force DMAing for the beginning of the check. |
| 850 | * Some chipsets appear to do interesting |
| 851 | * things, if not checked and cleared. |
| 852 | * PARANOIA!!! |
| 853 | */ |
Bartlomiej Zolnierkiewicz | 7469aaf | 2007-02-17 02:40:26 +0100 | [diff] [blame] | 854 | hwif->dma_off_quietly(drive); |
Bartlomiej Zolnierkiewicz | 8c0697c | 2007-10-16 22:29:58 +0200 | [diff] [blame] | 855 | ide_set_dma(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | } |
| 857 | } |
| 858 | } |
Kumar Gala | 208a08f | 2006-03-24 03:18:21 -0800 | [diff] [blame] | 859 | |
| 860 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
| 861 | ide_drive_t *drive = &hwif->drives[unit]; |
| 862 | |
| 863 | if (hwif->no_io_32bit) |
| 864 | drive->no_io_32bit = 1; |
| 865 | else |
| 866 | drive->no_io_32bit = drive->id->dword_io ? 1 : 0; |
| 867 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | } |
| 869 | |
| 870 | static int hwif_init(ide_hwif_t *hwif); |
Bartlomiej Zolnierkiewicz | 9601a60 | 2007-10-20 00:32:29 +0200 | [diff] [blame] | 871 | static void hwif_register_devices(ide_hwif_t *hwif); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | |
Bartlomiej Zolnierkiewicz | 8447d9d | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 873 | static int probe_hwif_init(ide_hwif_t *hwif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | { |
Bartlomiej Zolnierkiewicz | fd9bb53 | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 875 | probe_hwif(hwif); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | |
| 877 | if (!hwif_init(hwif)) { |
| 878 | printk(KERN_INFO "%s: failed to initialize IDE interface\n", |
| 879 | hwif->name); |
| 880 | return -1; |
| 881 | } |
| 882 | |
Bartlomiej Zolnierkiewicz | 9601a60 | 2007-10-20 00:32:29 +0200 | [diff] [blame] | 883 | if (hwif->present) |
| 884 | hwif_register_devices(hwif); |
Randy Dunlap | 349ae23 | 2006-10-03 01:14:23 -0700 | [diff] [blame] | 885 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | return 0; |
| 887 | } |
| 888 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | #if MAX_HWIFS > 1 |
| 890 | /* |
| 891 | * save_match() is used to simplify logic in init_irq() below. |
| 892 | * |
| 893 | * A loophole here is that we may not know about a particular |
| 894 | * hwif's irq until after that hwif is actually probed/initialized.. |
| 895 | * This could be a problem for the case where an hwif is on a |
| 896 | * dual interface that requires serialization (eg. cmd640) and another |
| 897 | * hwif using one of the same irqs is initialized beforehand. |
| 898 | * |
| 899 | * This routine detects and reports such situations, but does not fix them. |
| 900 | */ |
| 901 | static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) |
| 902 | { |
| 903 | ide_hwif_t *m = *match; |
| 904 | |
| 905 | if (m && m->hwgroup && m->hwgroup != new->hwgroup) { |
| 906 | if (!new->hwgroup) |
| 907 | return; |
| 908 | printk("%s: potential irq problem with %s and %s\n", |
| 909 | hwif->name, new->name, m->name); |
| 910 | } |
| 911 | if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ |
| 912 | *match = new; |
| 913 | } |
| 914 | #endif /* MAX_HWIFS > 1 */ |
| 915 | |
| 916 | /* |
| 917 | * init request queue |
| 918 | */ |
| 919 | static int ide_init_queue(ide_drive_t *drive) |
| 920 | { |
Jens Axboe | 165125e | 2007-07-24 09:28:11 +0200 | [diff] [blame] | 921 | struct request_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | ide_hwif_t *hwif = HWIF(drive); |
| 923 | int max_sectors = 256; |
| 924 | int max_sg_entries = PRD_ENTRIES; |
| 925 | |
| 926 | /* |
| 927 | * Our default set up assumes the normal IDE case, |
| 928 | * that is 64K segmenting, standard PRD setup |
| 929 | * and LBA28. Some drivers then impose their own |
| 930 | * limits and LBA48 we could raise it but as yet |
| 931 | * do not. |
| 932 | */ |
Christoph Lameter | 1946089 | 2005-06-23 00:08:19 -0700 | [diff] [blame] | 933 | |
Ravikiran G Thirumalai | 556e58f | 2005-08-04 12:53:26 -0700 | [diff] [blame] | 934 | q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | if (!q) |
| 936 | return 1; |
| 937 | |
| 938 | q->queuedata = drive; |
| 939 | blk_queue_segment_boundary(q, 0xffff); |
| 940 | |
| 941 | if (!hwif->rqsize) { |
Bartlomiej Zolnierkiewicz | 238e4f1 | 2007-10-19 00:30:07 +0200 | [diff] [blame] | 942 | if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || |
| 943 | (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | hwif->rqsize = 256; |
| 945 | else |
| 946 | hwif->rqsize = 65536; |
| 947 | } |
| 948 | if (hwif->rqsize < max_sectors) |
| 949 | max_sectors = hwif->rqsize; |
| 950 | blk_queue_max_sectors(q, max_sectors); |
| 951 | |
| 952 | #ifdef CONFIG_PCI |
| 953 | /* When we have an IOMMU, we may have a problem where pci_map_sg() |
| 954 | * creates segments that don't completely match our boundary |
| 955 | * requirements and thus need to be broken up again. Because it |
| 956 | * doesn't align properly either, we may actually have to break up |
| 957 | * to more segments than what was we got in the first place, a max |
| 958 | * worst case is twice as many. |
| 959 | * This will be fixed once we teach pci_map_sg() about our boundary |
| 960 | * requirements, hopefully soon. *FIXME* |
| 961 | */ |
| 962 | if (!PCI_DMA_BUS_IS_PHYS) |
| 963 | max_sg_entries >>= 1; |
| 964 | #endif /* CONFIG_PCI */ |
| 965 | |
| 966 | blk_queue_max_hw_segments(q, max_sg_entries); |
| 967 | blk_queue_max_phys_segments(q, max_sg_entries); |
| 968 | |
| 969 | /* assign drive queue */ |
| 970 | drive->queue = q; |
| 971 | |
| 972 | /* needs drive->queue to be set */ |
| 973 | ide_toggle_bounce(drive, 1); |
| 974 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | return 0; |
| 976 | } |
| 977 | |
| 978 | /* |
| 979 | * This routine sets up the irq for an ide interface, and creates a new |
| 980 | * hwgroup for the irq/hwif if none was previously assigned. |
| 981 | * |
| 982 | * Much of the code is for correctly detecting/handling irq sharing |
| 983 | * and irq serialization situations. This is somewhat complex because |
| 984 | * it handles static as well as dynamic (PCMCIA) IDE interfaces. |
| 985 | * |
Thomas Gleixner | 362537b | 2006-07-01 19:29:34 -0700 | [diff] [blame] | 986 | * The IRQF_DISABLED in sa_flags means ide_intr() is always entered with |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | * interrupts completely disabled. This can be bad for interrupt latency, |
| 988 | * but anything else has led to problems on some machines. We re-enable |
| 989 | * interrupts as much as we can safely do in most places. |
| 990 | */ |
| 991 | static int init_irq (ide_hwif_t *hwif) |
| 992 | { |
| 993 | unsigned int index; |
| 994 | ide_hwgroup_t *hwgroup; |
| 995 | ide_hwif_t *match = NULL; |
| 996 | |
| 997 | |
| 998 | BUG_ON(in_interrupt()); |
| 999 | BUG_ON(irqs_disabled()); |
Ravikiran G Thirumalai | 556e58f | 2005-08-04 12:53:26 -0700 | [diff] [blame] | 1000 | BUG_ON(hwif == NULL); |
| 1001 | |
Matthias Kaehlcke | ef29888 | 2007-07-09 23:17:55 +0200 | [diff] [blame] | 1002 | mutex_lock(&ide_cfg_mtx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | hwif->hwgroup = NULL; |
| 1004 | #if MAX_HWIFS > 1 |
| 1005 | /* |
| 1006 | * Group up with any other hwifs that share our irq(s). |
| 1007 | */ |
| 1008 | for (index = 0; index < MAX_HWIFS; index++) { |
| 1009 | ide_hwif_t *h = &ide_hwifs[index]; |
| 1010 | if (h->hwgroup) { /* scan only initialized hwif's */ |
| 1011 | if (hwif->irq == h->irq) { |
| 1012 | hwif->sharing_irq = h->sharing_irq = 1; |
| 1013 | if (hwif->chipset != ide_pci || |
| 1014 | h->chipset != ide_pci) { |
| 1015 | save_match(hwif, h, &match); |
| 1016 | } |
| 1017 | } |
| 1018 | if (hwif->serialized) { |
| 1019 | if (hwif->mate && hwif->mate->irq == h->irq) |
| 1020 | save_match(hwif, h, &match); |
| 1021 | } |
| 1022 | if (h->serialized) { |
| 1023 | if (h->mate && hwif->irq == h->mate->irq) |
| 1024 | save_match(hwif, h, &match); |
| 1025 | } |
| 1026 | } |
| 1027 | } |
| 1028 | #endif /* MAX_HWIFS > 1 */ |
| 1029 | /* |
| 1030 | * If we are still without a hwgroup, then form a new one |
| 1031 | */ |
| 1032 | if (match) { |
| 1033 | hwgroup = match->hwgroup; |
| 1034 | hwif->hwgroup = hwgroup; |
| 1035 | /* |
| 1036 | * Link us into the hwgroup. |
| 1037 | * This must be done early, do ensure that unexpected_intr |
| 1038 | * can find the hwif and prevent irq storms. |
| 1039 | * No drives are attached to the new hwif, choose_drive |
| 1040 | * can't do anything stupid (yet). |
| 1041 | * Add ourself as the 2nd entry to the hwgroup->hwif |
| 1042 | * linked list, the first entry is the hwif that owns |
| 1043 | * hwgroup->handler - do not change that. |
| 1044 | */ |
| 1045 | spin_lock_irq(&ide_lock); |
| 1046 | hwif->next = hwgroup->hwif->next; |
| 1047 | hwgroup->hwif->next = hwif; |
| 1048 | spin_unlock_irq(&ide_lock); |
| 1049 | } else { |
Christoph Lameter | 94f6030 | 2007-07-17 04:03:29 -0700 | [diff] [blame] | 1050 | hwgroup = kmalloc_node(sizeof(ide_hwgroup_t), |
| 1051 | GFP_KERNEL | __GFP_ZERO, |
Ravikiran G Thirumalai | 556e58f | 2005-08-04 12:53:26 -0700 | [diff] [blame] | 1052 | hwif_to_node(hwif->drives[0].hwif)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | if (!hwgroup) |
| 1054 | goto out_up; |
| 1055 | |
| 1056 | hwif->hwgroup = hwgroup; |
| 1057 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | hwgroup->hwif = hwif->next = hwif; |
| 1059 | hwgroup->rq = NULL; |
| 1060 | hwgroup->handler = NULL; |
| 1061 | hwgroup->drive = NULL; |
| 1062 | hwgroup->busy = 0; |
| 1063 | init_timer(&hwgroup->timer); |
| 1064 | hwgroup->timer.function = &ide_timer_expiry; |
| 1065 | hwgroup->timer.data = (unsigned long) hwgroup; |
| 1066 | } |
| 1067 | |
| 1068 | /* |
| 1069 | * Allocate the irq, if not already obtained for another hwif |
| 1070 | */ |
| 1071 | if (!match || match->irq != hwif->irq) { |
Thomas Gleixner | 362537b | 2006-07-01 19:29:34 -0700 | [diff] [blame] | 1072 | int sa = IRQF_DISABLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | #if defined(__mc68000__) || defined(CONFIG_APUS) |
Thomas Gleixner | 362537b | 2006-07-01 19:29:34 -0700 | [diff] [blame] | 1074 | sa = IRQF_SHARED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | #endif /* __mc68000__ || CONFIG_APUS */ |
| 1076 | |
| 1077 | if (IDE_CHIPSET_IS_PCI(hwif->chipset)) { |
Thomas Gleixner | 362537b | 2006-07-01 19:29:34 -0700 | [diff] [blame] | 1078 | sa = IRQF_SHARED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | #ifndef CONFIG_IDEPCI_SHARE_IRQ |
Thomas Gleixner | 362537b | 2006-07-01 19:29:34 -0700 | [diff] [blame] | 1080 | sa |= IRQF_DISABLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | #endif /* CONFIG_IDEPCI_SHARE_IRQ */ |
| 1082 | } |
| 1083 | |
| 1084 | if (hwif->io_ports[IDE_CONTROL_OFFSET]) |
| 1085 | /* clear nIEN */ |
| 1086 | hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]); |
| 1087 | |
| 1088 | if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) |
| 1089 | goto out_unlink; |
| 1090 | } |
| 1091 | |
| 1092 | /* |
| 1093 | * For any present drive: |
| 1094 | * - allocate the block device queue |
| 1095 | * - link drive into the hwgroup |
| 1096 | */ |
| 1097 | for (index = 0; index < MAX_DRIVES; ++index) { |
| 1098 | ide_drive_t *drive = &hwif->drives[index]; |
| 1099 | if (!drive->present) |
| 1100 | continue; |
| 1101 | if (ide_init_queue(drive)) { |
| 1102 | printk(KERN_ERR "ide: failed to init %s\n",drive->name); |
| 1103 | continue; |
| 1104 | } |
| 1105 | spin_lock_irq(&ide_lock); |
| 1106 | if (!hwgroup->drive) { |
| 1107 | /* first drive for hwgroup. */ |
| 1108 | drive->next = drive; |
| 1109 | hwgroup->drive = drive; |
| 1110 | hwgroup->hwif = HWIF(hwgroup->drive); |
| 1111 | } else { |
| 1112 | drive->next = hwgroup->drive->next; |
| 1113 | hwgroup->drive->next = drive; |
| 1114 | } |
| 1115 | spin_unlock_irq(&ide_lock); |
| 1116 | } |
| 1117 | |
David S. Miller | c6387a4 | 2006-06-20 01:21:29 -0700 | [diff] [blame] | 1118 | #if !defined(__mc68000__) && !defined(CONFIG_APUS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, |
| 1120 | hwif->io_ports[IDE_DATA_OFFSET], |
| 1121 | hwif->io_ports[IDE_DATA_OFFSET]+7, |
| 1122 | hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | #else |
| 1124 | printk("%s at 0x%08lx on irq %d", hwif->name, |
| 1125 | hwif->io_ports[IDE_DATA_OFFSET], hwif->irq); |
| 1126 | #endif /* __mc68000__ && CONFIG_APUS */ |
| 1127 | if (match) |
| 1128 | printk(" (%sed with %s)", |
| 1129 | hwif->sharing_irq ? "shar" : "serializ", match->name); |
| 1130 | printk("\n"); |
Matthias Kaehlcke | ef29888 | 2007-07-09 23:17:55 +0200 | [diff] [blame] | 1131 | mutex_unlock(&ide_cfg_mtx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | return 0; |
| 1133 | out_unlink: |
| 1134 | spin_lock_irq(&ide_lock); |
| 1135 | if (hwif->next == hwif) { |
| 1136 | BUG_ON(match); |
| 1137 | BUG_ON(hwgroup->hwif != hwif); |
| 1138 | kfree(hwgroup); |
| 1139 | } else { |
| 1140 | ide_hwif_t *g; |
| 1141 | g = hwgroup->hwif; |
| 1142 | while (g->next != hwif) |
| 1143 | g = g->next; |
| 1144 | g->next = hwif->next; |
| 1145 | if (hwgroup->hwif == hwif) { |
| 1146 | /* Impossible. */ |
| 1147 | printk(KERN_ERR "Duh. Uninitialized hwif listed as active hwif.\n"); |
| 1148 | hwgroup->hwif = g; |
| 1149 | } |
| 1150 | BUG_ON(hwgroup->hwif == hwif); |
| 1151 | } |
| 1152 | spin_unlock_irq(&ide_lock); |
| 1153 | out_up: |
Matthias Kaehlcke | ef29888 | 2007-07-09 23:17:55 +0200 | [diff] [blame] | 1154 | mutex_unlock(&ide_cfg_mtx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | return 1; |
| 1156 | } |
| 1157 | |
| 1158 | static int ata_lock(dev_t dev, void *data) |
| 1159 | { |
| 1160 | /* FIXME: we want to pin hwif down */ |
| 1161 | return 0; |
| 1162 | } |
| 1163 | |
| 1164 | static struct kobject *ata_probe(dev_t dev, int *part, void *data) |
| 1165 | { |
| 1166 | ide_hwif_t *hwif = data; |
| 1167 | int unit = *part >> PARTN_BITS; |
| 1168 | ide_drive_t *drive = &hwif->drives[unit]; |
| 1169 | if (!drive->present) |
| 1170 | return NULL; |
| 1171 | |
| 1172 | if (drive->media == ide_disk) |
| 1173 | request_module("ide-disk"); |
| 1174 | if (drive->scsi) |
| 1175 | request_module("ide-scsi"); |
| 1176 | if (drive->media == ide_cdrom || drive->media == ide_optical) |
| 1177 | request_module("ide-cd"); |
| 1178 | if (drive->media == ide_tape) |
| 1179 | request_module("ide-tape"); |
| 1180 | if (drive->media == ide_floppy) |
| 1181 | request_module("ide-floppy"); |
| 1182 | |
| 1183 | return NULL; |
| 1184 | } |
| 1185 | |
| 1186 | static struct kobject *exact_match(dev_t dev, int *part, void *data) |
| 1187 | { |
| 1188 | struct gendisk *p = data; |
| 1189 | *part &= (1 << PARTN_BITS) - 1; |
| 1190 | return &p->kobj; |
| 1191 | } |
| 1192 | |
| 1193 | static int exact_lock(dev_t dev, void *data) |
| 1194 | { |
| 1195 | struct gendisk *p = data; |
| 1196 | |
| 1197 | if (!get_disk(p)) |
| 1198 | return -1; |
| 1199 | return 0; |
| 1200 | } |
| 1201 | |
| 1202 | void ide_register_region(struct gendisk *disk) |
| 1203 | { |
| 1204 | blk_register_region(MKDEV(disk->major, disk->first_minor), |
| 1205 | disk->minors, NULL, exact_match, exact_lock, disk); |
| 1206 | } |
| 1207 | |
| 1208 | EXPORT_SYMBOL_GPL(ide_register_region); |
| 1209 | |
| 1210 | void ide_unregister_region(struct gendisk *disk) |
| 1211 | { |
| 1212 | blk_unregister_region(MKDEV(disk->major, disk->first_minor), |
| 1213 | disk->minors); |
| 1214 | } |
| 1215 | |
| 1216 | EXPORT_SYMBOL_GPL(ide_unregister_region); |
| 1217 | |
| 1218 | void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) |
| 1219 | { |
| 1220 | ide_hwif_t *hwif = drive->hwif; |
| 1221 | unsigned int unit = (drive->select.all >> 4) & 1; |
| 1222 | |
| 1223 | disk->major = hwif->major; |
| 1224 | disk->first_minor = unit << PARTN_BITS; |
| 1225 | sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); |
| 1226 | disk->queue = drive->queue; |
| 1227 | } |
| 1228 | |
| 1229 | EXPORT_SYMBOL_GPL(ide_init_disk); |
| 1230 | |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 1231 | static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) |
| 1232 | { |
| 1233 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; |
| 1234 | |
| 1235 | if (drive == drive->next) { |
| 1236 | /* special case: last drive from hwgroup. */ |
| 1237 | BUG_ON(hwgroup->drive != drive); |
| 1238 | hwgroup->drive = NULL; |
| 1239 | } else { |
| 1240 | ide_drive_t *walk; |
| 1241 | |
| 1242 | walk = hwgroup->drive; |
| 1243 | while (walk->next != drive) |
| 1244 | walk = walk->next; |
| 1245 | walk->next = drive->next; |
| 1246 | if (hwgroup->drive == drive) { |
| 1247 | hwgroup->drive = drive->next; |
| 1248 | hwgroup->hwif = hwgroup->drive->hwif; |
| 1249 | } |
| 1250 | } |
| 1251 | BUG_ON(hwgroup->drive == drive); |
| 1252 | } |
| 1253 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | static void drive_release_dev (struct device *dev) |
| 1255 | { |
| 1256 | ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); |
| 1257 | |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 1258 | spin_lock_irq(&ide_lock); |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 1259 | ide_remove_drive_from_hwgroup(drive); |
Jesper Juhl | 6044ec8 | 2005-11-07 01:01:32 -0800 | [diff] [blame] | 1260 | kfree(drive->id); |
| 1261 | drive->id = NULL; |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 1262 | drive->present = 0; |
| 1263 | /* Messed up locking ... */ |
| 1264 | spin_unlock_irq(&ide_lock); |
| 1265 | blk_cleanup_queue(drive->queue); |
| 1266 | spin_lock_irq(&ide_lock); |
| 1267 | drive->queue = NULL; |
| 1268 | spin_unlock_irq(&ide_lock); |
| 1269 | |
Aleksey Makarov | f36d402 | 2006-01-09 15:59:27 -0800 | [diff] [blame] | 1270 | complete(&drive->gendev_rel_comp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | } |
| 1272 | |
| 1273 | /* |
| 1274 | * init_gendisk() (as opposed to ide_geninit) is called for each major device, |
| 1275 | * after probing for drives, to allocate partition tables and other data |
| 1276 | * structures needed for the routines in genhd.c. ide_geninit() gets called |
| 1277 | * somewhat later, during the partition check. |
| 1278 | */ |
| 1279 | static void init_gendisk (ide_hwif_t *hwif) |
| 1280 | { |
| 1281 | unsigned int unit; |
| 1282 | |
| 1283 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
| 1284 | ide_drive_t * drive = &hwif->drives[unit]; |
| 1285 | ide_add_generic_settings(drive); |
| 1286 | snprintf(drive->gendev.bus_id,BUS_ID_SIZE,"%u.%u", |
| 1287 | hwif->index,unit); |
| 1288 | drive->gendev.parent = &hwif->gendev; |
| 1289 | drive->gendev.bus = &ide_bus_type; |
| 1290 | drive->gendev.driver_data = drive; |
| 1291 | drive->gendev.release = drive_release_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | } |
| 1293 | blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, |
| 1294 | THIS_MODULE, ata_probe, ata_lock, hwif); |
| 1295 | } |
| 1296 | |
| 1297 | static int hwif_init(ide_hwif_t *hwif) |
| 1298 | { |
| 1299 | int old_irq; |
| 1300 | |
| 1301 | /* Return success if no device is connected */ |
| 1302 | if (!hwif->present) |
| 1303 | return 1; |
| 1304 | |
| 1305 | if (!hwif->irq) { |
| 1306 | if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) |
| 1307 | { |
| 1308 | printk("%s: DISABLED, NO IRQ\n", hwif->name); |
| 1309 | return (hwif->present = 0); |
| 1310 | } |
| 1311 | } |
| 1312 | #ifdef CONFIG_BLK_DEV_HD |
| 1313 | if (hwif->irq == HD_IRQ && hwif->io_ports[IDE_DATA_OFFSET] != HD_DATA) { |
| 1314 | printk("%s: CANNOT SHARE IRQ WITH OLD " |
| 1315 | "HARDDISK DRIVER (hd.c)\n", hwif->name); |
| 1316 | return (hwif->present = 0); |
| 1317 | } |
| 1318 | #endif /* CONFIG_BLK_DEV_HD */ |
| 1319 | |
| 1320 | /* we set it back to 1 if all is ok below */ |
| 1321 | hwif->present = 0; |
| 1322 | |
| 1323 | if (register_blkdev(hwif->major, hwif->name)) |
| 1324 | return 0; |
| 1325 | |
| 1326 | if (!hwif->sg_max_nents) |
| 1327 | hwif->sg_max_nents = PRD_ENTRIES; |
| 1328 | |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 1329 | hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | GFP_KERNEL); |
| 1331 | if (!hwif->sg_table) { |
| 1332 | printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); |
| 1333 | goto out; |
| 1334 | } |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 1335 | |
| 1336 | sg_init_table(hwif->sg_table, hwif->sg_max_nents); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | |
| 1338 | if (init_irq(hwif) == 0) |
| 1339 | goto done; |
| 1340 | |
| 1341 | old_irq = hwif->irq; |
| 1342 | /* |
| 1343 | * It failed to initialise. Find the default IRQ for |
| 1344 | * this port and try that. |
| 1345 | */ |
| 1346 | if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) { |
| 1347 | printk("%s: Disabled unable to get IRQ %d.\n", |
| 1348 | hwif->name, old_irq); |
| 1349 | goto out; |
| 1350 | } |
| 1351 | if (init_irq(hwif)) { |
| 1352 | printk("%s: probed IRQ %d and default IRQ %d failed.\n", |
| 1353 | hwif->name, old_irq, hwif->irq); |
| 1354 | goto out; |
| 1355 | } |
| 1356 | printk("%s: probed IRQ %d failed, using default.\n", |
| 1357 | hwif->name, hwif->irq); |
| 1358 | |
| 1359 | done: |
| 1360 | init_gendisk(hwif); |
Hannes Reinecke | e3a59b4 | 2007-02-07 18:19:37 +0100 | [diff] [blame] | 1361 | |
| 1362 | ide_acpi_init(hwif); |
| 1363 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | hwif->present = 1; /* success */ |
| 1365 | return 1; |
| 1366 | |
| 1367 | out: |
| 1368 | unregister_blkdev(hwif->major, hwif->name); |
| 1369 | return 0; |
| 1370 | } |
| 1371 | |
Bartlomiej Zolnierkiewicz | 9601a60 | 2007-10-20 00:32:29 +0200 | [diff] [blame] | 1372 | static void hwif_register_devices(ide_hwif_t *hwif) |
| 1373 | { |
| 1374 | unsigned int i; |
| 1375 | |
| 1376 | for (i = 0; i < MAX_DRIVES; i++) { |
| 1377 | ide_drive_t *drive = &hwif->drives[i]; |
| 1378 | |
| 1379 | if (drive->present) { |
| 1380 | int ret = device_register(&drive->gendev); |
| 1381 | |
| 1382 | if (ret < 0) |
| 1383 | printk(KERN_WARNING "IDE: %s: " |
| 1384 | "device_register error: %d\n", |
| 1385 | __FUNCTION__, ret); |
| 1386 | } |
| 1387 | } |
| 1388 | } |
| 1389 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | int ideprobe_init (void) |
| 1391 | { |
| 1392 | unsigned int index; |
| 1393 | int probe[MAX_HWIFS]; |
| 1394 | |
| 1395 | memset(probe, 0, MAX_HWIFS * sizeof(int)); |
| 1396 | for (index = 0; index < MAX_HWIFS; ++index) |
| 1397 | probe[index] = !ide_hwifs[index].present; |
| 1398 | |
| 1399 | for (index = 0; index < MAX_HWIFS; ++index) |
| 1400 | if (probe[index]) |
Bartlomiej Zolnierkiewicz | fd9bb53 | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 1401 | probe_hwif(&ide_hwifs[index]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1402 | for (index = 0; index < MAX_HWIFS; ++index) |
| 1403 | if (probe[index]) |
| 1404 | hwif_init(&ide_hwifs[index]); |
| 1405 | for (index = 0; index < MAX_HWIFS; ++index) { |
| 1406 | if (probe[index]) { |
| 1407 | ide_hwif_t *hwif = &ide_hwifs[index]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | if (!hwif->present) |
| 1409 | continue; |
| 1410 | if (hwif->chipset == ide_unknown || hwif->chipset == ide_forced) |
| 1411 | hwif->chipset = ide_generic; |
Bartlomiej Zolnierkiewicz | 9601a60 | 2007-10-20 00:32:29 +0200 | [diff] [blame] | 1412 | hwif_register_devices(hwif); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | } |
| 1414 | } |
Bartlomiej Zolnierkiewicz | 5cbf79c | 2007-05-10 00:01:11 +0200 | [diff] [blame] | 1415 | for (index = 0; index < MAX_HWIFS; ++index) |
| 1416 | if (probe[index]) |
| 1417 | ide_proc_register_port(&ide_hwifs[index]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | return 0; |
| 1419 | } |
| 1420 | |
| 1421 | EXPORT_SYMBOL_GPL(ideprobe_init); |
Bartlomiej Zolnierkiewicz | 8447d9d | 2007-10-20 00:32:31 +0200 | [diff] [blame] | 1422 | |
| 1423 | int ide_device_add(u8 idx[4]) |
| 1424 | { |
| 1425 | int i, rc = 0; |
| 1426 | |
| 1427 | for (i = 0; i < 4; i++) { |
| 1428 | if (idx[i] != 0xff) |
| 1429 | rc |= probe_hwif_init(&ide_hwifs[idx[i]]); |
| 1430 | } |
| 1431 | |
| 1432 | for (i = 0; i < 4; i++) { |
| 1433 | if (idx[i] != 0xff) |
| 1434 | ide_proc_register_port(&ide_hwifs[idx[i]]); |
| 1435 | } |
| 1436 | |
| 1437 | return rc; |
| 1438 | } |
| 1439 | |
| 1440 | EXPORT_SYMBOL_GPL(ide_device_add); |