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
34 #undef REALLY_SLOW_IO /* most systems can safely undef this */
35
36 #include <linux/config.h>
37 #include <linux/module.h>
38 #include <linux/types.h>
39 #include <linux/string.h>
40 #include <linux/kernel.h>
41 #include <linux/timer.h>
42 #include <linux/mm.h>
43 #include <linux/interrupt.h>
44 #include <linux/major.h>
45 #include <linux/errno.h>
46 #include <linux/genhd.h>
47 #include <linux/slab.h>
48 #include <linux/delay.h>
49 #include <linux/ide.h>
50 #include <linux/spinlock.h>
51 #include <linux/pci.h>
52 #include <linux/kmod.h>
53
54 #include <asm/byteorder.h>
55 #include <asm/irq.h>
56 #include <asm/uaccess.h>
57 #include <asm/io.h>
58
59 /**
60 * generic_id - add a generic drive id
61 * @drive: drive to make an ID block for
62 *
63 * Add a fake id field to the drive we are passed. This allows
64 * use to skip a ton of NULL checks (which people always miss)
65 * and make drive properties unconditional outside of this file
66 */
67
generic_id(ide_drive_t * drive)68 static void generic_id(ide_drive_t *drive)
69 {
70 drive->id->cyls = drive->cyl;
71 drive->id->heads = drive->head;
72 drive->id->sectors = drive->sect;
73 drive->id->cur_cyls = drive->cyl;
74 drive->id->cur_heads = drive->head;
75 drive->id->cur_sectors = drive->sect;
76 }
77
78 /**
79 * drive_is_flashcard - check for compact flash
80 * @drive: drive to check
81 *
82 * CompactFlash cards and their brethern pretend to be removable
83 * hard disks, except:
84 * (1) they never have a slave unit, and
85 * (2) they don't have doorlock mechanisms.
86 * This test catches them, and is invoked elsewhere when setting
87 * appropriate config bits.
88 *
89 * FIXME: This treatment is probably applicable for *all* PCMCIA (PC CARD)
90 * devices, so in linux 2.3.x we should change this to just treat all
91 * PCMCIA drives this way, and get rid of the model-name tests below
92 * (too big of an interface change for 2.4.x).
93 * At that time, we might also consider parameterizing the timeouts and
94 * retries, since these are MUCH faster than mechanical drives. -M.Lord
95 */
96
drive_is_flashcard(ide_drive_t * drive)97 static inline int drive_is_flashcard (ide_drive_t *drive)
98 {
99 struct hd_driveid *id = drive->id;
100
101 if (drive->removable && id != NULL) {
102 if (id->config == 0x848a) return 1; /* CompactFlash */
103 if (!strncmp(id->model, "KODAK ATA_FLASH", 15) /* Kodak */
104 || !strncmp(id->model, "Hitachi CV", 10) /* Hitachi */
105 || !strncmp(id->model, "SunDisk SDCFB", 13) /* old SanDisk */
106 || !strncmp(id->model, "SanDisk SDCFB", 13) /* SanDisk */
107 || !strncmp(id->model, "HAGIWARA HPC", 12) /* Hagiwara */
108 || !strncmp(id->model, "LEXAR ATA_FLASH", 15) /* Lexar */
109 || !strncmp(id->model, "ATA_FLASH", 9)) /* Simple Tech */
110 {
111 return 1; /* yes, it is a flash memory card */
112 }
113 }
114 return 0; /* no, it is not a flash memory card */
115 }
116
117 /**
118 * do_identify - identify a drive
119 * @drive: drive to identify
120 * @cmd: command used
121 *
122 * Called when we have issued a drive identify command to
123 * read and parse the results. This function is run with
124 * interrupts disabled.
125 */
126
do_identify(ide_drive_t * drive,u8 cmd)127 static inline void do_identify (ide_drive_t *drive, u8 cmd)
128 {
129 ide_hwif_t *hwif = HWIF(drive);
130 int bswap = 1;
131 struct hd_driveid *id;
132
133 /* called with interrupts disabled! */
134 id = drive->id;
135 /* read 512 bytes of id info */
136 hwif->ata_input_data(drive, id, SECTOR_WORDS);
137 drive->id_read = 1;
138 local_irq_enable();
139
140 ide_fix_driveid(id);
141
142 if (!drive->forced_lun)
143 drive->last_lun = id->last_lun & 0x7;
144
145 #if defined (CONFIG_SCSI_EATA_DMA) || defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA)
146 /*
147 * EATA SCSI controllers do a hardware ATA emulation:
148 * Ignore them if there is a driver for them available.
149 */
150 if ((id->model[0] == 'P' && id->model[1] == 'M') ||
151 (id->model[0] == 'S' && id->model[1] == 'K')) {
152 printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model);
153 goto err_misc;
154 }
155 #endif /* CONFIG_SCSI_EATA_DMA || CONFIG_SCSI_EATA_PIO */
156
157 /*
158 * WIN_IDENTIFY returns little-endian info,
159 * WIN_PIDENTIFY *usually* returns little-endian info.
160 */
161 if (cmd == WIN_PIDENTIFY) {
162 if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */
163 || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */
164 || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */
165 /* Vertos drives may still be weird */
166 bswap ^= 1;
167 }
168 ide_fixstring(id->model, sizeof(id->model), bswap);
169 ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap);
170 ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap);
171
172 if (strstr(id->model, "E X A B Y T E N E S T"))
173 goto err_misc;
174
175 /* we depend on this a lot! */
176 id->model[sizeof(id->model)-1] = '\0';
177 printk("%s: %s, ", drive->name, id->model);
178 drive->present = 1;
179 drive->dead = 0;
180
181 /*
182 * Check for an ATAPI device
183 */
184 if (cmd == WIN_PIDENTIFY) {
185 u8 type = (id->config >> 8) & 0x1f;
186 printk("ATAPI ");
187 #ifdef CONFIG_BLK_DEV_PDC4030
188 if (hwif->channel == 1 && hwif->chipset == ide_pdc4030) {
189 printk(" -- not supported on 2nd Promise port\n");
190 goto err_misc;
191 }
192 #endif /* CONFIG_BLK_DEV_PDC4030 */
193 switch (type) {
194 case ide_floppy:
195 if (!strstr(id->model, "CD-ROM")) {
196 if (!strstr(id->model, "oppy") &&
197 !strstr(id->model, "poyp") &&
198 !strstr(id->model, "ZIP"))
199 printk("cdrom or floppy?, assuming ");
200 if (drive->media != ide_cdrom) {
201 printk ("FLOPPY");
202 drive->removable = 1;
203 break;
204 }
205 }
206 /* Early cdrom models used zero */
207 type = ide_cdrom;
208 case ide_cdrom:
209 drive->removable = 1;
210 #ifdef CONFIG_PPC
211 /* kludge for Apple PowerBook internal zip */
212 if (!strstr(id->model, "CD-ROM") &&
213 strstr(id->model, "ZIP")) {
214 printk ("FLOPPY");
215 type = ide_floppy;
216 break;
217 }
218 #endif
219 printk ("CD/DVD-ROM");
220 break;
221 case ide_tape:
222 printk ("TAPE");
223 break;
224 case ide_optical:
225 printk ("OPTICAL");
226 drive->removable = 1;
227 break;
228 default:
229 printk("UNKNOWN (type %d)", type);
230 break;
231 }
232 printk (" drive\n");
233 drive->media = type;
234 return;
235 }
236
237 /*
238 * Not an ATAPI device: looks like a "regular" hard disk
239 */
240 if (id->config & (1<<7))
241 drive->removable = 1;
242
243 /*
244 * Prevent long system lockup probing later for non-existant
245 * slave drive if the hwif is actually a flash memory card of
246 * some variety:
247 */
248 drive->is_flash = 0;
249 if (drive_is_flashcard(drive)) {
250 #if 0
251 /* The new IDE adapter widgets don't follow this heuristic
252 so we must nowdays just bite the bullet and take the
253 probe hit */
254 ide_drive_t *mate = &hwif->drives[1^drive->select.b.unit];
255 if (!mate->ata_flash) {
256 mate->present = 0;
257 mate->noprobe = 1;
258 }
259 #endif
260 drive->is_flash = 1;
261 }
262 drive->media = ide_disk;
263 printk("%s DISK drive\n", (drive->is_flash) ? "CFA" : "ATA" );
264 QUIRK_LIST(drive);
265 return;
266
267 err_misc:
268 kfree(id);
269 drive->present = 0;
270 return;
271 }
272
273 /**
274 * actual_try_to_identify - send ata/atapi identify
275 * @drive: drive to identify
276 * @cmd: comamnd to use
277 *
278 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
279 * and waits for a response. It also monitors irqs while this is
280 * happening, in hope of automatically determining which one is
281 * being used by the interface.
282 *
283 * Returns: 0 device was identified
284 * 1 device timed-out (no response to identify request)
285 * 2 device aborted the command (refused to identify itself)
286 */
287
actual_try_to_identify(ide_drive_t * drive,u8 cmd)288 static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
289 {
290 ide_hwif_t *hwif = HWIF(drive);
291 int rc;
292 ide_ioreg_t hd_status;
293 unsigned long timeout;
294 u8 s = 0, a = 0;
295
296 if (IDE_CONTROL_REG) {
297 /* take a deep breath */
298 ide_delay_50ms();
299 a = hwif->INB(IDE_ALTSTATUS_REG);
300 s = hwif->INB(IDE_STATUS_REG);
301 if ((a ^ s) & ~INDEX_STAT) {
302 printk(KERN_INFO "%s: probing with STATUS(0x%02x) instead of "
303 "ALTSTATUS(0x%02x)\n", drive->name, s, a);
304 /* ancient Seagate drives, broken interfaces */
305 hd_status = IDE_STATUS_REG;
306 } else {
307 /* use non-intrusive polling */
308 hd_status = IDE_ALTSTATUS_REG;
309 }
310 } else {
311 ide_delay_50ms();
312 hd_status = IDE_STATUS_REG;
313 }
314
315 /* set features register for atapi
316 * identify command to be sure of reply
317 */
318 if ((cmd == WIN_PIDENTIFY))
319 /* disable dma & overlap */
320 hwif->OUTB(0, IDE_FEATURE_REG);
321
322 if (hwif->identify != NULL) {
323 if (hwif->identify(drive))
324 return 1;
325 } else {
326 /* ask drive for ID */
327 hwif->OUTB(cmd, IDE_COMMAND_REG);
328 }
329 timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
330 timeout += jiffies;
331 do {
332 if (time_after(jiffies, timeout)) {
333 /* drive timed-out */
334 return 1;
335 }
336 /* give drive a breather */
337 ide_delay_50ms();
338 } while ((hwif->INB(hd_status)) & BUSY_STAT);
339
340 /* wait for IRQ and DRQ_STAT */
341 ide_delay_50ms();
342 if (OK_STAT((hwif->INB(IDE_STATUS_REG)), DRQ_STAT, BAD_R_STAT)) {
343 unsigned long flags;
344
345 /* local CPU only; some systems need this */
346 local_irq_save(flags);
347 /* drive returned ID */
348 do_identify(drive, cmd);
349 /* drive responded with ID */
350 rc = 0;
351 /* clear drive IRQ */
352 (void) hwif->INB(IDE_STATUS_REG);
353 local_irq_restore(flags);
354 } else {
355 /* drive refused ID */
356 rc = 2;
357 }
358 return rc;
359 }
360
361 /**
362 * try_to_identify - try to identify a drive
363 * @drive: drive to probe
364 * @cmd: comamnd to use
365 *
366 * Issue the identify command and then do IRQ probing to
367 * complete the identification when needed by finding the
368 * IRQ the drive is attached to
369 */
370
try_to_identify(ide_drive_t * drive,u8 cmd)371 static int try_to_identify (ide_drive_t *drive, u8 cmd)
372 {
373 ide_hwif_t *hwif = HWIF(drive);
374 int retval;
375 int autoprobe = 0;
376 unsigned long cookie = 0;
377
378 if (IDE_CONTROL_REG && !hwif->irq) {
379 autoprobe = 1;
380 cookie = probe_irq_on();
381 /* enable device irq */
382 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
383 }
384
385 retval = actual_try_to_identify(drive, cmd);
386
387 if (autoprobe) {
388 int irq;
389 /* mask device irq */
390 hwif->OUTB(drive->ctl|2, IDE_CONTROL_REG);
391 /* clear drive IRQ */
392 (void) hwif->INB(IDE_STATUS_REG);
393 udelay(5);
394 irq = probe_irq_off(cookie);
395 if (!hwif->irq) {
396 if (irq > 0) {
397 hwif->irq = irq;
398 } else {
399 /* Mmmm.. multiple IRQs..
400 * don't know which was ours
401 */
402 printk("%s: IRQ probe failed (0x%lx)\n",
403 drive->name, cookie);
404 #ifdef CONFIG_BLK_DEV_CMD640
405 #ifdef CMD640_DUMP_REGS
406 if (hwif->chipset == ide_cmd640) {
407 printk("%s: Hmmm.. probably a driver "
408 "problem.\n", drive->name);
409 CMD640_DUMP_REGS;
410 }
411 #endif /* CMD640_DUMP_REGS */
412 #endif /* CONFIG_BLK_DEV_CMD640 */
413 }
414 }
415 }
416 return retval;
417 }
418
419
420 /**
421 * do_probe - probe an IDE device
422 * @drive: drive to probe
423 * @cmd: command to use
424 *
425 * do_probe() has the difficult job of finding a drive if it exists,
426 * without getting hung up if it doesn't exist, without trampling on
427 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
428 *
429 * If a drive is "known" to exist (from CMOS or kernel parameters),
430 * but does not respond right away, the probe will "hang in there"
431 * for the maximum wait time (about 30 seconds), otherwise it will
432 * exit much more quickly.
433 *
434 * Returns: 0 device was identified
435 * 1 device timed-out (no response to identify request)
436 * 2 device aborted the command (refused to identify itself)
437 * 3 bad status from device (possible for ATAPI drives)
438 * 4 probe was not attempted because failure was obvious
439 */
440
do_probe(ide_drive_t * drive,u8 cmd)441 static int do_probe (ide_drive_t *drive, u8 cmd)
442 {
443 int rc;
444 ide_hwif_t *hwif = HWIF(drive);
445
446 if (drive->present) {
447 /* avoid waiting for inappropriate probes */
448 if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY))
449 return 4;
450 }
451 #ifdef DEBUG
452 printk("probing for %s: present=%d, media=%d, probetype=%s\n",
453 drive->name, drive->present, drive->media,
454 (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI");
455 #endif
456
457 /* needed for some systems
458 * (e.g. crw9624 as drive0 with disk as slave)
459 */
460 ide_delay_50ms();
461 SELECT_DRIVE(drive);
462 ide_delay_50ms();
463 if (hwif->INB(IDE_SELECT_REG) != drive->select.all && !drive->present) {
464 if (drive->select.b.unit != 0) {
465 /* exit with drive0 selected */
466 SELECT_DRIVE(&hwif->drives[0]);
467 /* allow BUSY_STAT to assert & clear */
468 ide_delay_50ms();
469 }
470 /* no i/f present: mmm.. this should be a 4 -ml */
471 return 3;
472 }
473
474 if (OK_STAT((hwif->INB(IDE_STATUS_REG)), READY_STAT, BUSY_STAT) ||
475 drive->present || cmd == WIN_PIDENTIFY) {
476 /* send cmd and wait */
477 if ((rc = try_to_identify(drive, cmd))) {
478 /* failed: try again */
479 rc = try_to_identify(drive,cmd);
480 }
481 if (hwif->INB(IDE_STATUS_REG) == (BUSY_STAT|READY_STAT))
482 return 4;
483
484 if ((rc == 1 && cmd == WIN_PIDENTIFY) &&
485 ((drive->autotune == IDE_TUNE_DEFAULT) ||
486 (drive->autotune == IDE_TUNE_AUTO))) {
487 unsigned long timeout;
488 printk("%s: no response (status = 0x%02x), "
489 "resetting drive\n", drive->name,
490 hwif->INB(IDE_STATUS_REG));
491 ide_delay_50ms();
492 hwif->OUTB(drive->select.all, IDE_SELECT_REG);
493 ide_delay_50ms();
494 hwif->OUTB(WIN_SRST, IDE_COMMAND_REG);
495 timeout = jiffies;
496 while (((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) &&
497 time_before(jiffies, timeout + WAIT_WORSTCASE))
498 ide_delay_50ms();
499 rc = try_to_identify(drive, cmd);
500 }
501 if (rc == 1)
502 printk("%s: no response (status = 0x%02x)\n",
503 drive->name, hwif->INB(IDE_STATUS_REG));
504 /* ensure drive irq is clear */
505 (void) hwif->INB(IDE_STATUS_REG);
506 } else {
507 /* not present or maybe ATAPI */
508 rc = 3;
509 }
510 if (drive->select.b.unit != 0) {
511 /* exit with drive0 selected */
512 SELECT_DRIVE(&hwif->drives[0]);
513 ide_delay_50ms();
514 /* ensure drive irq is clear */
515 (void) hwif->INB(IDE_STATUS_REG);
516 }
517 return rc;
518 }
519
520 /*
521 *
522 */
enable_nest(ide_drive_t * drive)523 static void enable_nest (ide_drive_t *drive)
524 {
525 ide_hwif_t *hwif = HWIF(drive);
526 unsigned long timeout;
527
528 printk("%s: enabling %s -- ", hwif->name, drive->id->model);
529 SELECT_DRIVE(drive);
530 ide_delay_50ms();
531 hwif->OUTB(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG);
532 timeout = jiffies + WAIT_WORSTCASE;
533 do {
534 if (time_after(jiffies, timeout)) {
535 printk("failed (timeout)\n");
536 return;
537 }
538 ide_delay_50ms();
539 } while ((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT);
540
541 ide_delay_50ms();
542
543 if (!OK_STAT((hwif->INB(IDE_STATUS_REG)), 0, BAD_STAT)) {
544 printk("failed (status = 0x%02x)\n", hwif->INB(IDE_STATUS_REG));
545 } else {
546 printk("success\n");
547 }
548
549 /* if !(success||timed-out) */
550 if (do_probe(drive, WIN_IDENTIFY) >= 2) {
551 /* look for ATAPI device */
552 (void) do_probe(drive, WIN_PIDENTIFY);
553 }
554 }
555
556 /**
557 * ide_probe_for_drives - upper level drive probe
558 * @drive: drive to probe for
559 *
560 * probe_for_drive() tests for existence of a given drive using do_probe()
561 * and presents things to the user as needed.
562 *
563 * Returns: 0 no device was found
564 * 1 device was found (note: drive->present might
565 * still be 0)
566 */
567
ide_probe_for_drive(ide_drive_t * drive)568 u8 ide_probe_for_drive (ide_drive_t *drive)
569 {
570 /*
571 * In order to keep things simple we have an id
572 * block for all drives at all times. If the device
573 * is pre ATA or refuses ATA/ATAPI identify we
574 * will add faked data to this.
575 *
576 * Also note that 0 everywhere means "can't do X"
577 */
578
579 drive->id = kmalloc(SECTOR_WORDS *4, GFP_KERNEL);
580 drive->id_read = 0;
581 if(drive->id == NULL)
582 {
583 printk(KERN_ERR "ide: out of memory for id data.\n");
584 return 0;
585 }
586 memset(drive->id, 0, SECTOR_WORDS * 4);
587 strcpy(drive->id->model, "UNKNOWN");
588
589 /* skip probing? */
590 if (!drive->noprobe)
591 {
592 /* if !(success||timed-out) */
593 if (do_probe(drive, WIN_IDENTIFY) >= 2) {
594 /* look for ATAPI device */
595 (void) do_probe(drive, WIN_PIDENTIFY);
596 }
597 if (strstr(drive->id->model, "E X A B Y T E N E S T"))
598 enable_nest(drive);
599 if (!drive->present)
600 /* drive not found */
601 return 0;
602
603 /* identification failed? */
604 if (!drive->id_read) {
605 if (drive->media == ide_disk) {
606 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
607 drive->name, drive->cyl,
608 drive->head, drive->sect);
609 } else if (drive->media == ide_cdrom) {
610 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
611 } else {
612 /* nuke it */
613 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
614 drive->present = 0;
615 }
616 }
617 /* drive was found */
618 }
619 if(!drive->present)
620 return 0;
621 /* The drive wasn't being helpful. Add generic info only */
622 if(!drive->id_read)
623 generic_id(drive);
624 return drive->present;
625 }
626
627 #define hwif_check_region(addr, num) \
628 ((hwif->mmio) ? check_mem_region((addr),(num)) : check_region((addr),(num)))
629
630 /**
631 * hwif_check_regions - check resources for IDE
632 * @hwif: interface to use
633 *
634 * Checks if all the needed resources for an interface are free
635 * providing the interface is PIO. Right now core IDE code does
636 * this work which is deeply wrong. MMIO leaves it to the controller
637 * driver, PIO will migrate this way over time
638 */
639
hwif_check_regions(ide_hwif_t * hwif)640 static int hwif_check_regions (ide_hwif_t *hwif)
641 {
642 u32 i = 0;
643 int addr_errs = 0;
644
645 if (hwif->mmio == 2)
646 return 0;
647 addr_errs = hwif_check_region(hwif->io_ports[IDE_DATA_OFFSET], 1);
648 for (i = IDE_ERROR_OFFSET; i <= IDE_STATUS_OFFSET; i++)
649 addr_errs += hwif_check_region(hwif->io_ports[i], 1);
650 if (hwif->io_ports[IDE_CONTROL_OFFSET])
651 addr_errs += hwif_check_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
652 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
653 if (hwif->io_ports[IDE_IRQ_OFFSET])
654 addr_errs += hwif_check_region(hwif->io_ports[IDE_IRQ_OFFSET], 1);
655 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
656 /* If any errors are return, we drop the hwif interface. */
657 hwif->straight8 = 0;
658 return(addr_errs);
659 }
660
661 //EXPORT_SYMBOL(hwif_check_regions);
662
663 #define hwif_request_region(addr, num, name) \
664 ((hwif->mmio) ? request_mem_region((addr),(num),(name)) : request_region((addr),(num),(name)))
665
hwif_register(ide_hwif_t * hwif)666 static void hwif_register (ide_hwif_t *hwif)
667 {
668 u32 i = 0;
669
670 if (hwif->mmio == 2)
671 return;
672 if (hwif->io_ports[IDE_CONTROL_OFFSET])
673 hwif_request_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1, hwif->name);
674 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
675 if (hwif->io_ports[IDE_IRQ_OFFSET])
676 hwif_request_region(hwif->io_ports[IDE_IRQ_OFFSET], 1, hwif->name);
677 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
678 if (((unsigned long)hwif->io_ports[IDE_DATA_OFFSET] | 7) ==
679 ((unsigned long)hwif->io_ports[IDE_STATUS_OFFSET])) {
680 hwif_request_region(hwif->io_ports[IDE_DATA_OFFSET], 8, hwif->name);
681 hwif->straight8 = 1;
682 return;
683 }
684
685 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
686 hwif_request_region(hwif->io_ports[i], 1, hwif->name);
687 }
688
689 //EXPORT_SYMBOL(hwif_register);
690
691 /*
692 * This function waits for the hwif to report a non-busy status
693 * see comments in probe_hwif()
694 */
wait_not_busy(ide_hwif_t * hwif,unsigned long timeout)695 static int wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
696 {
697 u8 stat = 0;
698
699 while(timeout--) {
700 /* Turn this into a schedule() sleep once I'm sure
701 * about locking issues (2.5 work ?)
702 */
703 mdelay(1);
704 stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
705 if ((stat & BUSY_STAT) == 0)
706 break;
707 /* Assume a value of 0xff means nothing is connected to
708 * the interface and it doesn't implement the pull-down
709 * resistor on D7
710 */
711 if (stat == 0xff)
712 break;
713 }
714 return ((stat & BUSY_STAT) == 0) ? 0 : -EBUSY;
715 }
716
ide_wait_hwif_ready(ide_hwif_t * hwif)717 int ide_wait_hwif_ready(ide_hwif_t *hwif)
718 {
719 int rc;
720
721 printk(KERN_INFO "Probing IDE interface %s...\n", hwif->name);
722
723 /* Let HW settle down a bit from whatever init state we
724 * come from */
725 mdelay(2);
726
727 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
728 * I know of at least one disk who takes 31 seconds, I use 35
729 * here to be safe
730 */
731 rc = wait_not_busy(hwif, 35000);
732 if (rc)
733 return rc;
734
735 /* Now make sure both master & slave are ready */
736 SELECT_DRIVE(&hwif->drives[0]);
737 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
738 mdelay(2);
739 rc = wait_not_busy(hwif, 10000);
740 if (rc)
741 return rc;
742 SELECT_DRIVE(&hwif->drives[1]);
743 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
744 mdelay(2);
745 rc = wait_not_busy(hwif, 10000);
746
747 /* Exit function with master reselected (let's be sane) */
748 SELECT_DRIVE(&hwif->drives[0]);
749
750 return rc;
751 }
752
ide_probe_reset(ide_hwif_t * hwif)753 void ide_probe_reset(ide_hwif_t *hwif)
754 {
755 if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) {
756 unsigned long timeout = jiffies + WAIT_WORSTCASE;
757 u8 stat;
758
759 printk(KERN_WARNING "%s: reset\n", hwif->name);
760 hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]);
761 udelay(10);
762 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
763 do {
764 ide_delay_50ms();
765 stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
766 } while ((stat & BUSY_STAT) && time_after(timeout, jiffies));
767 }
768 }
769
ide_tune_drives(ide_hwif_t * hwif)770 void ide_tune_drives(ide_hwif_t *hwif)
771 {
772 int unit;
773
774 for (unit = 0; unit < MAX_DRIVES; ++unit) {
775 ide_drive_t *drive = &hwif->drives[unit];
776 int enable_dma = 1;
777
778 if (drive->present) {
779 if (hwif->tuneproc != NULL &&
780 drive->autotune == IDE_TUNE_AUTO)
781 /* auto-tune PIO mode */
782 hwif->tuneproc(drive, 255);
783
784 #ifdef CONFIG_IDEDMA_ONLYDISK
785 if (drive->media != ide_disk)
786 enable_dma = 0;
787 #endif
788 /*
789 * MAJOR HACK BARF :-/
790 *
791 * FIXME: chipsets own this cruft!
792 */
793 /*
794 * Move here to prevent module loading clashing.
795 */
796 // drive->autodma = hwif->autodma;
797 if ((hwif->ide_dma_check) &&
798 ((drive->autotune == IDE_TUNE_DEFAULT) ||
799 (drive->autotune == IDE_TUNE_AUTO))) {
800 /*
801 * Force DMAing for the beginning of the check.
802 * Some chipsets appear to do interesting
803 * things, if not checked and cleared.
804 * PARANOIA!!!
805 */
806 hwif->ide_dma_off_quietly(drive);
807 if (enable_dma)
808 hwif->ide_dma_check(drive);
809 }
810 }
811 }
812 }
813
814 /*
815 * This routine only knows how to look for drive units 0 and 1
816 * on an interface, so any setting of MAX_DRIVES > 2 won't work here.
817 */
probe_hwif(ide_hwif_t * hwif)818 void probe_hwif (ide_hwif_t *hwif)
819 {
820 unsigned int unit;
821 unsigned long flags;
822 int irqd;
823
824 if (hwif->noprobe)
825 return;
826 #ifdef CONFIG_BLK_DEV_IDE
827 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA) {
828 extern void probe_cmos_for_drives(ide_hwif_t *);
829 probe_cmos_for_drives(hwif);
830 }
831 #endif
832 if ((hwif->chipset != ide_4drives || !hwif->mate || !hwif->mate->present) &&
833 #if CONFIG_BLK_DEV_PDC4030
834 (hwif->chipset != ide_pdc4030 || hwif->channel == 0) &&
835 #endif /* CONFIG_BLK_DEV_PDC4030 */
836 (hwif_check_regions(hwif))) {
837 u16 msgout = 0;
838 for (unit = 0; unit < MAX_DRIVES; ++unit) {
839 ide_drive_t *drive = &hwif->drives[unit];
840 if (drive->present) {
841 drive->present = 0;
842 printk(KERN_ERR "%s: ERROR, PORTS ALREADY IN USE\n",
843 drive->name);
844 msgout = 1;
845 }
846 }
847 if (!msgout)
848 printk(KERN_ERR "%s: ports already in use, skipping probe\n",
849 hwif->name);
850 return;
851 }
852
853 /*
854 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
855 * we'll install our IRQ driver much later...
856 */
857 irqd = hwif->irq;
858 if (irqd > 0)
859 disable_irq(irqd);
860
861 local_irq_set(flags);
862
863 #ifdef CONFIG_PPC
864 /* This is needed on some PPCs and a bunch of BIOS-less embedded
865 * platforms. Typical cases are:
866 *
867 * - The firmware hard reset the disk before booting the kernel,
868 * the drive is still doing it's poweron-reset sequence, that
869 * can take up to 30 seconds
870 * - The firmware does nothing (or no firmware), the device is
871 * still in POST state (same as above actually).
872 * - Some CD/DVD/Writer combo drives tend to drive the bus during
873 * their reset sequence even when they are non-selected slave
874 * devices, thus preventing discovery of the main HD
875 *
876 * Doing this wait-for-busy should not harm any existing configuration
877 * (at least things won't be worse than what current code does, that
878 * is blindly go & talk to the drive) and fix some issues like the
879 * above.
880 *
881 * BenH.
882 */
883 if (ide_wait_hwif_ready(hwif))
884 printk(KERN_WARNING "%s: Wait for ready failed before probe !\n", hwif->name);
885 #endif /* CONFIG_PPC */
886
887 /*
888 * Second drive should only exist if first drive was found,
889 * but a lot of cdrom drives are configured as single slaves.
890 */
891 for (unit = 0; unit < MAX_DRIVES; ++unit) {
892 ide_drive_t *drive = &hwif->drives[unit];
893 drive->dn = ((hwif->channel ? 2 : 0) + unit);
894 hwif->drives[unit].dn = ((hwif->channel ? 2 : 0) + unit);
895 (void) ide_probe_for_drive(drive);
896 if (drive->present && !hwif->present) {
897 hwif->present = 1;
898 if (hwif->chipset != ide_4drives ||
899 !hwif->mate ||
900 !hwif->mate->present) {
901 hwif_register(hwif);
902 }
903 }
904 }
905
906 ide_probe_reset(hwif);
907 local_irq_restore(flags);
908 /*
909 * Use cached IRQ number. It might be (and is...) changed by probe
910 * code above
911 */
912 if (irqd > 0)
913 enable_irq(irqd);
914
915 ide_tune_drives(hwif);
916
917 }
918
919 EXPORT_SYMBOL(probe_hwif);
920
921 #if 0
922 int hwif_init (ide_hwif_t *hwif);
923 int probe_hwif_init (ide_hwif_t *hwif)
924 {
925 hwif->initializing = 1;
926 probe_hwif(hwif);
927 hwif_init(hwif);
928
929 #if 1
930 if (hwif->present) {
931 u16 unit = 0;
932 for (unit = 0; unit < MAX_DRIVES; ++unit) {
933 ide_drive_t *drive = &hwif->drives[unit];
934 if (drive->present) {
935 ata_attach(drive);
936 }
937 }
938 }
939 #endif
940 hwif->initializing = 0;
941 return 0;
942 }
943
944 EXPORT_SYMBOL(probe_hwif_init);
945 #endif
946
947 #if MAX_HWIFS > 1
948 /*
949 * save_match() is used to simplify logic in init_irq() below.
950 *
951 * A loophole here is that we may not know about a particular
952 * hwif's irq until after that hwif is actually probed/initialized..
953 * This could be a problem for the case where an hwif is on a
954 * dual interface that requires serialization (eg. cmd640) and another
955 * hwif using one of the same irqs is initialized beforehand.
956 *
957 * This routine detects and reports such situations, but does not fix them.
958 */
save_match(ide_hwif_t * hwif,ide_hwif_t * new,ide_hwif_t ** match)959 void save_match (ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
960 {
961 ide_hwif_t *m = *match;
962
963 if (m && m->hwgroup && m->hwgroup != new->hwgroup) {
964 if (!new->hwgroup)
965 return;
966 printk("%s: potential irq problem with %s and %s\n",
967 hwif->name, new->name, m->name);
968 }
969 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */
970 *match = new;
971 }
972 EXPORT_SYMBOL(save_match);
973 #endif /* MAX_HWIFS > 1 */
974
975 /*
976 * init request queue
977 */
ide_init_queue(ide_drive_t * drive)978 static void ide_init_queue(ide_drive_t *drive)
979 {
980 request_queue_t *q = &drive->queue;
981
982 q->queuedata = HWGROUP(drive);
983 blk_init_queue(q, do_ide_request);
984 blk_queue_throttle_sectors(q, 1);
985 }
986
987 #undef __IRQ_HELL_SPIN
988 /*
989 * This routine sets up the irq for an ide interface, and creates a new
990 * hwgroup for the irq/hwif if none was previously assigned.
991 *
992 * Much of the code is for correctly detecting/handling irq sharing
993 * and irq serialization situations. This is somewhat complex because
994 * it handles static as well as dynamic (PCMCIA) IDE interfaces.
995 *
996 * The SA_INTERRUPT in sa_flags means ide_intr() is always entered with
997 * interrupts completely disabled. This can be bad for interrupt latency,
998 * but anything else has led to problems on some machines. We re-enable
999 * interrupts as much as we can safely do in most places.
1000 */
init_irq(ide_hwif_t * hwif)1001 int init_irq (ide_hwif_t *hwif)
1002 {
1003 unsigned long flags;
1004 unsigned int index;
1005 ide_hwgroup_t *hwgroup, *new_hwgroup;
1006 ide_hwif_t *match = NULL;
1007
1008 #if 0
1009 /* Allocate the buffer and no sleep allowed */
1010 new_hwgroup = kmalloc(sizeof(ide_hwgroup_t),GFP_ATOMIC);
1011 #else
1012 /* Allocate the buffer and potentially sleep first */
1013 new_hwgroup = kmalloc(sizeof(ide_hwgroup_t),GFP_KERNEL);
1014 #endif
1015
1016 #ifndef __IRQ_HELL_SPIN
1017 save_and_cli(flags);
1018 #else
1019 spin_lock_irqsave(&io_request_lock, flags);
1020 #endif
1021
1022 hwif->hwgroup = NULL;
1023 #if MAX_HWIFS > 1
1024 /*
1025 * Group up with any other hwifs that share our irq(s).
1026 */
1027 for (index = 0; index < MAX_HWIFS; index++) {
1028 ide_hwif_t *h = &ide_hwifs[index];
1029 if (h->hwgroup) { /* scan only initialized hwif's */
1030 if (hwif->irq == h->irq) {
1031 hwif->sharing_irq = h->sharing_irq = 1;
1032 if (hwif->chipset != ide_pci ||
1033 h->chipset != ide_pci) {
1034 save_match(hwif, h, &match);
1035 }
1036 }
1037 if (hwif->serialized) {
1038 if (hwif->mate && hwif->mate->irq == h->irq)
1039 save_match(hwif, h, &match);
1040 }
1041 if (h->serialized) {
1042 if (h->mate && hwif->irq == h->mate->irq)
1043 save_match(hwif, h, &match);
1044 }
1045 }
1046 }
1047 #endif /* MAX_HWIFS > 1 */
1048 /*
1049 * If we are still without a hwgroup, then form a new one
1050 */
1051 if (match) {
1052 hwgroup = match->hwgroup;
1053 if(new_hwgroup)
1054 kfree(new_hwgroup);
1055 } else {
1056 hwgroup = new_hwgroup;
1057 if (!hwgroup) {
1058 #ifndef __IRQ_HELL_SPIN
1059 restore_flags(flags);
1060 #else
1061 spin_unlock_irqrestore(&io_request_lock, flags);
1062 #endif
1063 return 1;
1064 }
1065 memset(hwgroup, 0, sizeof(ide_hwgroup_t));
1066 hwgroup->hwif = hwif->next = hwif;
1067 hwgroup->rq = NULL;
1068 hwgroup->handler = NULL;
1069 hwgroup->drive = NULL;
1070 hwgroup->busy = 0;
1071 init_timer(&hwgroup->timer);
1072 hwgroup->timer.function = &ide_timer_expiry;
1073 hwgroup->timer.data = (unsigned long) hwgroup;
1074 }
1075
1076 /*
1077 * Allocate the irq, if not already obtained for another hwif
1078 */
1079 if (!match || match->irq != hwif->irq) {
1080 int sa = SA_INTERRUPT;
1081 #if defined(__mc68000__) || defined(CONFIG_APUS)
1082 sa = SA_SHIRQ;
1083 #endif /* __mc68000__ || CONFIG_APUS */
1084
1085 if (IDE_CHIPSET_IS_PCI(hwif->chipset)) {
1086 sa = SA_SHIRQ;
1087 #ifndef CONFIG_IDEPCI_SHARE_IRQ
1088 sa |= SA_INTERRUPT;
1089 #endif /* CONFIG_IDEPCI_SHARE_IRQ */
1090 }
1091
1092 if (hwif->io_ports[IDE_CONTROL_OFFSET])
1093 /* clear nIEN */
1094 hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]);
1095
1096 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) {
1097 if (!match)
1098 kfree(hwgroup);
1099 #ifndef __IRQ_HELL_SPIN
1100 restore_flags(flags);
1101 #else
1102 spin_unlock_irqrestore(&io_request_lock, flags);
1103 #endif
1104 return 1;
1105 }
1106 }
1107
1108 /*
1109 * Everything is okay, so link us into the hwgroup
1110 */
1111 hwif->hwgroup = hwgroup;
1112 hwif->next = hwgroup->hwif->next;
1113 hwgroup->hwif->next = hwif;
1114
1115 for (index = 0; index < MAX_DRIVES; ++index) {
1116 ide_drive_t *drive = &hwif->drives[index];
1117 if (!drive->present)
1118 continue;
1119 if (!hwgroup->drive)
1120 hwgroup->drive = drive;
1121 drive->next = hwgroup->drive->next;
1122 hwgroup->drive->next = drive;
1123 ide_init_queue(drive);
1124 }
1125 if (!hwgroup->hwif) {
1126 hwgroup->hwif = HWIF(hwgroup->drive);
1127 #ifdef DEBUG
1128 printk("%s : Adding missed hwif to hwgroup!!\n", hwif->name);
1129 #endif
1130 }
1131
1132 /* all CPUs; safe now that hwif->hwgroup is set up */
1133 #ifndef __IRQ_HELL_SPIN
1134 restore_flags(flags);
1135 #else
1136 spin_unlock_irqrestore(&io_request_lock, flags);
1137 #endif
1138
1139 #if !defined(__mc68000__) && !defined(CONFIG_APUS) && !defined(__sparc__)
1140 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
1141 hwif->io_ports[IDE_DATA_OFFSET],
1142 hwif->io_ports[IDE_DATA_OFFSET]+7,
1143 hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq);
1144 #elif defined(__sparc__)
1145 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %s", hwif->name,
1146 hwif->io_ports[IDE_DATA_OFFSET],
1147 hwif->io_ports[IDE_DATA_OFFSET]+7,
1148 hwif->io_ports[IDE_CONTROL_OFFSET], __irq_itoa(hwif->irq));
1149 #else
1150 printk("%s at 0x%08lx on irq %d", hwif->name,
1151 hwif->io_ports[IDE_DATA_OFFSET], hwif->irq);
1152 #endif /* __mc68000__ && CONFIG_APUS */
1153 if (match)
1154 printk(" (%sed with %s)",
1155 hwif->sharing_irq ? "shar" : "serializ", match->name);
1156 printk("\n");
1157 return 0;
1158 }
1159
1160 EXPORT_SYMBOL(init_irq);
1161
1162 /*
1163 * init_gendisk() (as opposed to ide_geninit) is called for each major device,
1164 * after probing for drives, to allocate partition tables and other data
1165 * structures needed for the routines in genhd.c. ide_geninit() gets called
1166 * somewhat later, during the partition check.
1167 */
init_gendisk(ide_hwif_t * hwif)1168 static void init_gendisk (ide_hwif_t *hwif)
1169 {
1170 struct gendisk *gd;
1171 unsigned int unit, units, minors;
1172 int *bs, *max_sect, *max_ra;
1173 extern devfs_handle_t ide_devfs_handle;
1174
1175 units = MAX_DRIVES;
1176
1177 minors = units * (1<<PARTN_BITS);
1178 gd = kmalloc(sizeof(struct gendisk), GFP_KERNEL);
1179 if (!gd)
1180 goto err_kmalloc_gd;
1181 memset(gd, 0, sizeof(struct gendisk));
1182
1183 gd->sizes = kmalloc(minors * sizeof(int), GFP_KERNEL);
1184 if (!gd->sizes)
1185 goto err_kmalloc_gd_sizes;
1186 gd->part = kmalloc(minors * sizeof(struct hd_struct), GFP_KERNEL);
1187 if (!gd->part)
1188 goto err_kmalloc_gd_part;
1189 bs = kmalloc(minors*sizeof(int), GFP_KERNEL);
1190 if (!bs)
1191 goto err_kmalloc_bs;
1192 max_sect = kmalloc(minors*sizeof(int), GFP_KERNEL);
1193 if (!max_sect)
1194 goto err_kmalloc_max_sect;
1195 max_ra = kmalloc(minors*sizeof(int), GFP_KERNEL);
1196 if (!max_ra)
1197 goto err_kmalloc_max_ra;
1198
1199 memset(gd->part, 0, minors * sizeof(struct hd_struct));
1200
1201 /* cdroms and msdos f/s are examples of non-1024 blocksizes */
1202 blksize_size[hwif->major] = bs;
1203 max_sectors[hwif->major] = max_sect;
1204 max_readahead[hwif->major] = max_ra;
1205 for (unit = 0; unit < minors; ++unit) {
1206 *bs++ = BLOCK_SIZE;
1207 /*
1208 * IDE can do up to 128K per request == 256
1209 */
1210 *max_sect++ = ((hwif->rqsize) ? hwif->rqsize : 128);
1211 *max_ra++ = vm_max_readahead;
1212 }
1213
1214 for (unit = 0; unit < units; ++unit)
1215 hwif->drives[unit].part = &gd->part[unit << PARTN_BITS];
1216
1217 /* our major device number */
1218 gd->major = hwif->major;
1219 /* treated special in genhd.c */
1220 gd->major_name = IDE_MAJOR_NAME;
1221 /* num bits for partitions */
1222 gd->minor_shift = PARTN_BITS;
1223 /* 1 + max partitions / drive */
1224 gd->max_p = 1<<PARTN_BITS;
1225 /* current num real drives */
1226 gd->nr_real = units;
1227 /* ptr to internal data */
1228 gd->real_devices= hwif;
1229 /* linked list of major devs */
1230 gd->next = NULL;
1231 /* file operations */
1232 gd->fops = ide_fops;
1233 gd->de_arr = kmalloc(sizeof *gd->de_arr * units, GFP_KERNEL);
1234 gd->flags = kmalloc(sizeof *gd->flags * units, GFP_KERNEL);
1235 if (gd->de_arr)
1236 memset(gd->de_arr, 0, sizeof *gd->de_arr * units);
1237 if (gd->flags)
1238 memset(gd->flags, 0, sizeof *gd->flags * units);
1239
1240 hwif->gd = gd;
1241 add_gendisk(gd);
1242
1243 for (unit = 0; unit < units; ++unit) {
1244 char name[64];
1245 ide_add_generic_settings(hwif->drives + unit);
1246 // hwif->drives[unit].dn = ((hwif->channel ? 2 : 0) + unit);
1247 sprintf (name, "host%d/bus%d/target%d/lun%d",
1248 (hwif->channel && hwif->mate) ?
1249 hwif->mate->index : hwif->index,
1250 hwif->channel, unit, hwif->drives[unit].lun);
1251 if (hwif->drives[unit].present)
1252 hwif->drives[unit].de = devfs_mk_dir(ide_devfs_handle, name, NULL);
1253 }
1254 return;
1255
1256 err_kmalloc_max_ra:
1257 kfree(max_sect);
1258 err_kmalloc_max_sect:
1259 kfree(bs);
1260 err_kmalloc_bs:
1261 kfree(gd->part);
1262 err_kmalloc_gd_part:
1263 kfree(gd->sizes);
1264 err_kmalloc_gd_sizes:
1265 kfree(gd);
1266 err_kmalloc_gd:
1267 printk(KERN_WARNING "(ide::init_gendisk) Out of memory\n");
1268 return;
1269 }
1270
1271 EXPORT_SYMBOL(init_gendisk);
1272
hwif_init(ide_hwif_t * hwif)1273 int hwif_init (ide_hwif_t *hwif)
1274 {
1275 if (!hwif->present)
1276 return 0;
1277 if (!hwif->irq) {
1278 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET])))
1279 {
1280 printk("%s: DISABLED, NO IRQ\n", hwif->name);
1281 return (hwif->present = 0);
1282 }
1283 }
1284 #ifdef CONFIG_BLK_DEV_HD
1285 if (hwif->irq == HD_IRQ && hwif->io_ports[IDE_DATA_OFFSET] != HD_DATA) {
1286 printk("%s: CANNOT SHARE IRQ WITH OLD "
1287 "HARDDISK DRIVER (hd.c)\n", hwif->name);
1288 return (hwif->present = 0);
1289 }
1290 #endif /* CONFIG_BLK_DEV_HD */
1291
1292 /* we set it back to 1 if all is ok below */
1293 hwif->present = 0;
1294
1295 if (devfs_register_blkdev (hwif->major, hwif->name, ide_fops)) {
1296 printk("%s: UNABLE TO GET MAJOR NUMBER %d\n",
1297 hwif->name, hwif->major);
1298 return (hwif->present = 0);
1299 }
1300
1301 if (init_irq(hwif)) {
1302 int i = hwif->irq;
1303 /*
1304 * It failed to initialise. Find the default IRQ for
1305 * this port and try that.
1306 */
1307 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) {
1308 printk("%s: Disabled unable to get IRQ %d.\n",
1309 hwif->name, i);
1310 (void) unregister_blkdev(hwif->major, hwif->name);
1311 return (hwif->present = 0);
1312 }
1313 if (init_irq(hwif)) {
1314 printk("%s: probed IRQ %d and default IRQ %d failed.\n",
1315 hwif->name, i, hwif->irq);
1316 (void) unregister_blkdev(hwif->major, hwif->name);
1317 return (hwif->present = 0);
1318 }
1319 printk("%s: probed IRQ %d failed, using default.\n",
1320 hwif->name, hwif->irq);
1321 }
1322
1323 init_gendisk(hwif);
1324 blk_dev[hwif->major].data = hwif;
1325 blk_dev[hwif->major].queue = ide_get_queue;
1326 read_ahead[hwif->major] = 8; /* (4kB) */
1327 hwif->present = 1; /* success */
1328
1329 #if (DEBUG_SPINLOCK > 0)
1330 {
1331 static int done = 0;
1332 if (!done++)
1333 printk("io_request_lock is %p\n", &io_request_lock); /* FIXME */
1334 }
1335 #endif
1336 return hwif->present;
1337 }
1338
1339 EXPORT_SYMBOL(hwif_init);
1340
export_ide_init_queue(ide_drive_t * drive)1341 void export_ide_init_queue (ide_drive_t *drive)
1342 {
1343 ide_init_queue(drive);
1344 }
1345
1346 EXPORT_SYMBOL(export_ide_init_queue);
1347
1348 #ifndef HWIF_PROBE_CLASSIC_METHOD
probe_hwif_init(ide_hwif_t * hwif)1349 int probe_hwif_init (ide_hwif_t *hwif)
1350 {
1351 hwif->initializing = 1;
1352 probe_hwif(hwif);
1353 hwif_init(hwif);
1354
1355 #ifndef CLASSIC_BUILTINS_METHOD
1356 # ifndef FAKE_CLASSIC_ATTACH_METHOD
1357 # ifdef DIRECT_HWIF_PROBE_ATTACH_METHOD
1358 if (hwif->present) {
1359 u16 unit = 0;
1360 for (unit = 0; unit < MAX_DRIVES; ++unit) {
1361 ide_drive_t *drive = &hwif->drives[unit];
1362 if (drive->present)
1363 ide_attach_drive(drive);
1364 }
1365 }
1366 # endif /* DIRECT_HWIF_PROBE_ATTACH_METHOD */
1367 # endif /* FAKE_CLASSIC_ATTACH_METHOD */
1368 #endif /* CLASSIC_BUILTINS_METHOD */
1369 hwif->initializing = 0;
1370 return 0;
1371 }
1372
1373 EXPORT_SYMBOL(probe_hwif_init);
1374
1375 #endif /* HWIF_PROBE_CLASSIC_METHOD */
1376
1377 int ideprobe_init (void);
1378 static ide_module_t ideprobe_module = {
1379 IDE_PROBE_MODULE,
1380 ideprobe_init,
1381 NULL
1382 };
1383
ideprobe_init(void)1384 int ideprobe_init (void)
1385 {
1386 unsigned int index;
1387 int probe[MAX_HWIFS];
1388
1389 MOD_INC_USE_COUNT;
1390 memset(probe, 0, MAX_HWIFS * sizeof(int));
1391 for (index = 0; index < MAX_HWIFS; ++index)
1392 probe[index] = !ide_hwifs[index].present;
1393
1394 /*
1395 * Probe for drives in the usual way.. CMOS/BIOS, then poke at ports
1396 */
1397 #ifdef HWIF_PROBE_CLASSIC_METHOD
1398 for (index = 0; index < MAX_HWIFS; ++index)
1399 if (probe[index])
1400 probe_hwif(&ide_hwifs[index]);
1401
1402 for (index = 0; index < MAX_HWIFS; ++index)
1403 if (probe[index])
1404 hwif_init(&ide_hwifs[index]);
1405 #else /* HWIF_PROBE_CLASSIC_METHOD */
1406 for (index = 0; index < MAX_HWIFS; ++index)
1407 if (probe[index])
1408 probe_hwif_init(&ide_hwifs[index]);
1409 #endif /* HWIF_PROBE_CLASSIC_METHOD */
1410
1411 if (!ide_probe)
1412 ide_probe = &ideprobe_module;
1413 MOD_DEC_USE_COUNT;
1414 return 0;
1415 }
1416
1417 #ifdef MODULE
1418 extern int (*ide_xlate_1024_hook)(kdev_t, int, int, const char *);
1419
1420 static int ideprobe_done = 0;
1421
ideprobe_init_module(void)1422 int ideprobe_init_module (void)
1423 {
1424 unsigned int index;
1425
1426 if (ideprobe_done)
1427 return -EBUSY;
1428
1429 for (index = 0; index < MAX_HWIFS; ++index)
1430 ide_unregister(index);
1431 ideprobe_init();
1432 create_proc_ide_interfaces();
1433 ide_xlate_1024_hook = ide_xlate_1024;
1434 ideprobe_done++;
1435 return 0;
1436 }
1437
ideprobe_cleanup_module(void)1438 void ideprobe_cleanup_module (void)
1439 {
1440 ide_probe = NULL;
1441 ide_xlate_1024_hook = 0;
1442 }
1443 EXPORT_SYMBOL(ideprobe_init_module);
1444 EXPORT_SYMBOL(ideprobe_cleanup_module);
1445 MODULE_LICENSE("GPL");
1446 #endif /* MODULE */
1447