cleanup after APUS removal
[linux-2.6.git] / drivers / ide / ide-probe.c
1 /*
2  *  Copyright (C) 1994-1998   Linus Torvalds & authors (see below)
3  *  Copyright (C) 2005, 2007  Bartlomiej Zolnierkiewicz
4  */
5
6 /*
7  *  Mostly written by Mark Lord <mlord@pobox.com>
8  *                and Gadi Oxman <gadio@netvision.net.il>
9  *                and Andre Hedrick <andre@linux-ide.org>
10  *
11  *  See linux/MAINTAINERS for address of current maintainer.
12  *
13  * This is the IDE probe module, as evolved from hd.c and ide.c.
14  *
15  * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot
16  *       by Andrea Arcangeli
17  */
18
19 #include <linux/module.h>
20 #include <linux/types.h>
21 #include <linux/string.h>
22 #include <linux/kernel.h>
23 #include <linux/timer.h>
24 #include <linux/mm.h>
25 #include <linux/interrupt.h>
26 #include <linux/major.h>
27 #include <linux/errno.h>
28 #include <linux/genhd.h>
29 #include <linux/slab.h>
30 #include <linux/delay.h>
31 #include <linux/ide.h>
32 #include <linux/spinlock.h>
33 #include <linux/kmod.h>
34 #include <linux/pci.h>
35 #include <linux/scatterlist.h>
36
37 #include <asm/byteorder.h>
38 #include <asm/irq.h>
39 #include <asm/uaccess.h>
40 #include <asm/io.h>
41
42 /**
43  *      generic_id              -       add a generic drive id
44  *      @drive: drive to make an ID block for
45  *      
46  *      Add a fake id field to the drive we are passed. This allows
47  *      use to skip a ton of NULL checks (which people always miss) 
48  *      and make drive properties unconditional outside of this file
49  */
50  
51 static void generic_id(ide_drive_t *drive)
52 {
53         drive->id->cyls = drive->cyl;
54         drive->id->heads = drive->head;
55         drive->id->sectors = drive->sect;
56         drive->id->cur_cyls = drive->cyl;
57         drive->id->cur_heads = drive->head;
58         drive->id->cur_sectors = drive->sect;
59 }
60
61 static void ide_disk_init_chs(ide_drive_t *drive)
62 {
63         struct hd_driveid *id = drive->id;
64
65         /* Extract geometry if we did not already have one for the drive */
66         if (!drive->cyl || !drive->head || !drive->sect) {
67                 drive->cyl  = drive->bios_cyl  = id->cyls;
68                 drive->head = drive->bios_head = id->heads;
69                 drive->sect = drive->bios_sect = id->sectors;
70         }
71
72         /* Handle logical geometry translation by the drive */
73         if ((id->field_valid & 1) && id->cur_cyls &&
74             id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) {
75                 drive->cyl  = id->cur_cyls;
76                 drive->head = id->cur_heads;
77                 drive->sect = id->cur_sectors;
78         }
79
80         /* Use physical geometry if what we have still makes no sense */
81         if (drive->head > 16 && id->heads && id->heads <= 16) {
82                 drive->cyl  = id->cyls;
83                 drive->head = id->heads;
84                 drive->sect = id->sectors;
85         }
86 }
87
88 static void ide_disk_init_mult_count(ide_drive_t *drive)
89 {
90         struct hd_driveid *id = drive->id;
91
92         drive->mult_count = 0;
93         if (id->max_multsect) {
94 #ifdef CONFIG_IDEDISK_MULTI_MODE
95                 id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0;
96                 id->multsect_valid = id->multsect ? 1 : 0;
97                 drive->mult_req = id->multsect_valid ? id->max_multsect : 0;
98                 drive->special.b.set_multmode = drive->mult_req ? 1 : 0;
99 #else   /* original, pre IDE-NFG, per request of AC */
100                 drive->mult_req = 0;
101                 if (drive->mult_req > id->max_multsect)
102                         drive->mult_req = id->max_multsect;
103                 if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect))
104                         drive->special.b.set_multmode = 1;
105 #endif
106         }
107 }
108
109 /**
110  *      do_identify     -       identify a drive
111  *      @drive: drive to identify 
112  *      @cmd: command used
113  *
114  *      Called when we have issued a drive identify command to
115  *      read and parse the results. This function is run with
116  *      interrupts disabled. 
117  */
118  
119 static inline void do_identify (ide_drive_t *drive, u8 cmd)
120 {
121         ide_hwif_t *hwif = HWIF(drive);
122         int bswap = 1;
123         struct hd_driveid *id;
124
125         id = drive->id;
126         /* read 512 bytes of id info */
127         hwif->ata_input_data(drive, id, SECTOR_WORDS);
128
129         drive->id_read = 1;
130         local_irq_enable();
131 #ifdef DEBUG
132         printk(KERN_INFO "%s: dumping identify data\n", drive->name);
133         ide_dump_identify((u8 *)id);
134 #endif
135         ide_fix_driveid(id);
136
137 #if defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA)
138         /*
139          * EATA SCSI controllers do a hardware ATA emulation:
140          * Ignore them if there is a driver for them available.
141          */
142         if ((id->model[0] == 'P' && id->model[1] == 'M') ||
143             (id->model[0] == 'S' && id->model[1] == 'K')) {
144                 printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model);
145                 goto err_misc;
146         }
147 #endif /* CONFIG_SCSI_EATA || CONFIG_SCSI_EATA_PIO */
148
149         /*
150          *  WIN_IDENTIFY returns little-endian info,
151          *  WIN_PIDENTIFY *usually* returns little-endian info.
152          */
153         if (cmd == WIN_PIDENTIFY) {
154                 if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */
155                  || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */
156                  || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */
157                         /* Vertos drives may still be weird */
158                         bswap ^= 1;     
159         }
160         ide_fixstring(id->model,     sizeof(id->model),     bswap);
161         ide_fixstring(id->fw_rev,    sizeof(id->fw_rev),    bswap);
162         ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap);
163
164         /* we depend on this a lot! */
165         id->model[sizeof(id->model)-1] = '\0';
166
167         if (strstr(id->model, "E X A B Y T E N E S T"))
168                 goto err_misc;
169
170         printk("%s: %s, ", drive->name, id->model);
171         drive->present = 1;
172         drive->dead = 0;
173
174         /*
175          * Check for an ATAPI device
176          */
177         if (cmd == WIN_PIDENTIFY) {
178                 u8 type = (id->config >> 8) & 0x1f;
179                 printk("ATAPI ");
180                 switch (type) {
181                         case ide_floppy:
182                                 if (!strstr(id->model, "CD-ROM")) {
183                                         if (!strstr(id->model, "oppy") &&
184                                             !strstr(id->model, "poyp") &&
185                                             !strstr(id->model, "ZIP"))
186                                                 printk("cdrom or floppy?, assuming ");
187                                         if (drive->media != ide_cdrom) {
188                                                 printk ("FLOPPY");
189                                                 drive->removable = 1;
190                                                 break;
191                                         }
192                                 }
193                                 /* Early cdrom models used zero */
194                                 type = ide_cdrom;
195                         case ide_cdrom:
196                                 drive->removable = 1;
197 #ifdef CONFIG_PPC
198                                 /* kludge for Apple PowerBook internal zip */
199                                 if (!strstr(id->model, "CD-ROM") &&
200                                     strstr(id->model, "ZIP")) {
201                                         printk ("FLOPPY");
202                                         type = ide_floppy;
203                                         break;
204                                 }
205 #endif
206                                 printk ("CD/DVD-ROM");
207                                 break;
208                         case ide_tape:
209                                 printk ("TAPE");
210                                 break;
211                         case ide_optical:
212                                 printk ("OPTICAL");
213                                 drive->removable = 1;
214                                 break;
215                         default:
216                                 printk("UNKNOWN (type %d)", type);
217                                 break;
218                 }
219                 printk (" drive\n");
220                 drive->media = type;
221                 /* an ATAPI device ignores DRDY */
222                 drive->ready_stat = 0;
223                 return;
224         }
225
226         /*
227          * Not an ATAPI device: looks like a "regular" hard disk
228          */
229
230         /*
231          * 0x848a = CompactFlash device
232          * These are *not* removable in Linux definition of the term
233          */
234
235         if ((id->config != 0x848a) && (id->config & (1<<7)))
236                 drive->removable = 1;
237
238         drive->media = ide_disk;
239         printk("%s DISK drive\n", (id->config == 0x848a) ? "CFA" : "ATA" );
240
241         return;
242
243 err_misc:
244         kfree(id);
245         drive->present = 0;
246         return;
247 }
248
249 /**
250  *      actual_try_to_identify  -       send ata/atapi identify
251  *      @drive: drive to identify
252  *      @cmd: command to use
253  *
254  *      try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
255  *      and waits for a response.  It also monitors irqs while this is
256  *      happening, in hope of automatically determining which one is
257  *      being used by the interface.
258  *
259  *      Returns:        0  device was identified
260  *                      1  device timed-out (no response to identify request)
261  *                      2  device aborted the command (refused to identify itself)
262  */
263
264 static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
265 {
266         ide_hwif_t *hwif = HWIF(drive);
267         int use_altstatus = 0, rc;
268         unsigned long timeout;
269         u8 s = 0, a = 0;
270
271         /* take a deep breath */
272         msleep(50);
273
274         if (IDE_CONTROL_REG) {
275                 a = ide_read_altstatus(drive);
276                 s = ide_read_status(drive);
277                 if ((a ^ s) & ~INDEX_STAT)
278                         /* ancient Seagate drives, broken interfaces */
279                         printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
280                                          "instead of ALTSTATUS(0x%02x)\n",
281                                          drive->name, s, a);
282                 else
283                         /* use non-intrusive polling */
284                         use_altstatus = 1;
285         }
286
287         /* set features register for atapi
288          * identify command to be sure of reply
289          */
290         if ((cmd == WIN_PIDENTIFY))
291                 /* disable dma & overlap */
292                 hwif->OUTB(0, IDE_FEATURE_REG);
293
294         /* ask drive for ID */
295         hwif->OUTB(cmd, IDE_COMMAND_REG);
296
297         timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
298         timeout += jiffies;
299         do {
300                 if (time_after(jiffies, timeout)) {
301                         /* drive timed-out */
302                         return 1;
303                 }
304                 /* give drive a breather */
305                 msleep(50);
306                 s = use_altstatus ? ide_read_altstatus(drive)
307                                   : ide_read_status(drive);
308         } while (s & BUSY_STAT);
309
310         /* wait for IRQ and DRQ_STAT */
311         msleep(50);
312         s = ide_read_status(drive);
313
314         if (OK_STAT(s, DRQ_STAT, BAD_R_STAT)) {
315                 unsigned long flags;
316
317                 /* local CPU only; some systems need this */
318                 local_irq_save(flags);
319                 /* drive returned ID */
320                 do_identify(drive, cmd);
321                 /* drive responded with ID */
322                 rc = 0;
323                 /* clear drive IRQ */
324                 (void)ide_read_status(drive);
325                 local_irq_restore(flags);
326         } else {
327                 /* drive refused ID */
328                 rc = 2;
329         }
330         return rc;
331 }
332
333 /**
334  *      try_to_identify -       try to identify a drive
335  *      @drive: drive to probe
336  *      @cmd: command to use
337  *
338  *      Issue the identify command and then do IRQ probing to
339  *      complete the identification when needed by finding the
340  *      IRQ the drive is attached to
341  */
342  
343 static int try_to_identify (ide_drive_t *drive, u8 cmd)
344 {
345         ide_hwif_t *hwif = HWIF(drive);
346         int retval;
347         int autoprobe = 0;
348         unsigned long cookie = 0;
349
350         /*
351          * Disable device irq unless we need to
352          * probe for it. Otherwise we'll get spurious
353          * interrupts during the identify-phase that
354          * the irq handler isn't expecting.
355          */
356         if (IDE_CONTROL_REG) {
357                 if (!hwif->irq) {
358                         autoprobe = 1;
359                         cookie = probe_irq_on();
360                 }
361                 ide_set_irq(drive, autoprobe);
362         }
363
364         retval = actual_try_to_identify(drive, cmd);
365
366         if (autoprobe) {
367                 int irq;
368
369                 ide_set_irq(drive, 0);
370                 /* clear drive IRQ */
371                 (void)ide_read_status(drive);
372                 udelay(5);
373                 irq = probe_irq_off(cookie);
374                 if (!hwif->irq) {
375                         if (irq > 0) {
376                                 hwif->irq = irq;
377                         } else {
378                                 /* Mmmm.. multiple IRQs..
379                                  * don't know which was ours
380                                  */
381                                 printk("%s: IRQ probe failed (0x%lx)\n",
382                                         drive->name, cookie);
383                         }
384                 }
385         }
386         return retval;
387 }
388
389 static int ide_busy_sleep(ide_hwif_t *hwif)
390 {
391         unsigned long timeout = jiffies + WAIT_WORSTCASE;
392         u8 stat;
393
394         do {
395                 msleep(50);
396                 stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
397                 if ((stat & BUSY_STAT) == 0)
398                         return 0;
399         } while (time_before(jiffies, timeout));
400
401         return 1;
402 }
403
404 /**
405  *      do_probe                -       probe an IDE device
406  *      @drive: drive to probe
407  *      @cmd: command to use
408  *
409  *      do_probe() has the difficult job of finding a drive if it exists,
410  *      without getting hung up if it doesn't exist, without trampling on
411  *      ethernet cards, and without leaving any IRQs dangling to haunt us later.
412  *
413  *      If a drive is "known" to exist (from CMOS or kernel parameters),
414  *      but does not respond right away, the probe will "hang in there"
415  *      for the maximum wait time (about 30 seconds), otherwise it will
416  *      exit much more quickly.
417  *
418  * Returns:     0  device was identified
419  *              1  device timed-out (no response to identify request)
420  *              2  device aborted the command (refused to identify itself)
421  *              3  bad status from device (possible for ATAPI drives)
422  *              4  probe was not attempted because failure was obvious
423  */
424
425 static int do_probe (ide_drive_t *drive, u8 cmd)
426 {
427         ide_hwif_t *hwif = HWIF(drive);
428         int rc;
429         u8 stat;
430
431         if (drive->present) {
432                 /* avoid waiting for inappropriate probes */
433                 if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY))
434                         return 4;
435         }
436 #ifdef DEBUG
437         printk("probing for %s: present=%d, media=%d, probetype=%s\n",
438                 drive->name, drive->present, drive->media,
439                 (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI");
440 #endif
441
442         /* needed for some systems
443          * (e.g. crw9624 as drive0 with disk as slave)
444          */
445         msleep(50);
446         SELECT_DRIVE(drive);
447         msleep(50);
448         if (hwif->INB(IDE_SELECT_REG) != drive->select.all && !drive->present) {
449                 if (drive->select.b.unit != 0) {
450                         /* exit with drive0 selected */
451                         SELECT_DRIVE(&hwif->drives[0]);
452                         /* allow BUSY_STAT to assert & clear */
453                         msleep(50);
454                 }
455                 /* no i/f present: mmm.. this should be a 4 -ml */
456                 return 3;
457         }
458
459         stat = ide_read_status(drive);
460
461         if (OK_STAT(stat, READY_STAT, BUSY_STAT) ||
462             drive->present || cmd == WIN_PIDENTIFY) {
463                 /* send cmd and wait */
464                 if ((rc = try_to_identify(drive, cmd))) {
465                         /* failed: try again */
466                         rc = try_to_identify(drive,cmd);
467                 }
468
469                 stat = ide_read_status(drive);
470
471                 if (stat == (BUSY_STAT | READY_STAT))
472                         return 4;
473
474                 if ((rc == 1 && cmd == WIN_PIDENTIFY) &&
475                         ((drive->autotune == IDE_TUNE_DEFAULT) ||
476                         (drive->autotune == IDE_TUNE_AUTO))) {
477                         printk(KERN_ERR "%s: no response (status = 0x%02x), "
478                                         "resetting drive\n", drive->name, stat);
479                         msleep(50);
480                         hwif->OUTB(drive->select.all, IDE_SELECT_REG);
481                         msleep(50);
482                         hwif->OUTB(WIN_SRST, IDE_COMMAND_REG);
483                         (void)ide_busy_sleep(hwif);
484                         rc = try_to_identify(drive, cmd);
485                 }
486
487                 /* ensure drive IRQ is clear */
488                 stat = ide_read_status(drive);
489
490                 if (rc == 1)
491                         printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
492                                         drive->name, stat);
493         } else {
494                 /* not present or maybe ATAPI */
495                 rc = 3;
496         }
497         if (drive->select.b.unit != 0) {
498                 /* exit with drive0 selected */
499                 SELECT_DRIVE(&hwif->drives[0]);
500                 msleep(50);
501                 /* ensure drive irq is clear */
502                 (void)ide_read_status(drive);
503         }
504         return rc;
505 }
506
507 /*
508  *
509  */
510 static void enable_nest (ide_drive_t *drive)
511 {
512         ide_hwif_t *hwif = HWIF(drive);
513         u8 stat;
514
515         printk("%s: enabling %s -- ", hwif->name, drive->id->model);
516         SELECT_DRIVE(drive);
517         msleep(50);
518         hwif->OUTB(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG);
519
520         if (ide_busy_sleep(hwif)) {
521                 printk(KERN_CONT "failed (timeout)\n");
522                 return;
523         }
524
525         msleep(50);
526
527         stat = ide_read_status(drive);
528
529         if (!OK_STAT(stat, 0, BAD_STAT))
530                 printk(KERN_CONT "failed (status = 0x%02x)\n", stat);
531         else
532                 printk(KERN_CONT "success\n");
533
534         /* if !(success||timed-out) */
535         if (do_probe(drive, WIN_IDENTIFY) >= 2) {
536                 /* look for ATAPI device */
537                 (void) do_probe(drive, WIN_PIDENTIFY);
538         }
539 }
540
541 /**
542  *      probe_for_drives        -       upper level drive probe
543  *      @drive: drive to probe for
544  *
545  *      probe_for_drive() tests for existence of a given drive using do_probe()
546  *      and presents things to the user as needed.
547  *
548  *      Returns:        0  no device was found
549  *                      1  device was found (note: drive->present might
550  *                         still be 0)
551  */
552  
553 static inline u8 probe_for_drive (ide_drive_t *drive)
554 {
555         /*
556          *      In order to keep things simple we have an id
557          *      block for all drives at all times. If the device
558          *      is pre ATA or refuses ATA/ATAPI identify we
559          *      will add faked data to this.
560          *
561          *      Also note that 0 everywhere means "can't do X"
562          */
563  
564         drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL);
565         drive->id_read = 0;
566         if(drive->id == NULL)
567         {
568                 printk(KERN_ERR "ide: out of memory for id data.\n");
569                 return 0;
570         }
571         strcpy(drive->id->model, "UNKNOWN");
572         
573         /* skip probing? */
574         if (!drive->noprobe)
575         {
576                 /* if !(success||timed-out) */
577                 if (do_probe(drive, WIN_IDENTIFY) >= 2) {
578                         /* look for ATAPI device */
579                         (void) do_probe(drive, WIN_PIDENTIFY);
580                 }
581                 if (!drive->present)
582                         /* drive not found */
583                         return 0;
584                 if (strstr(drive->id->model, "E X A B Y T E N E S T"))
585                         enable_nest(drive);
586         
587                 /* identification failed? */
588                 if (!drive->id_read) {
589                         if (drive->media == ide_disk) {
590                                 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
591                                         drive->name, drive->cyl,
592                                         drive->head, drive->sect);
593                         } else if (drive->media == ide_cdrom) {
594                                 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
595                         } else {
596                                 /* nuke it */
597                                 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
598                                 drive->present = 0;
599                         }
600                 }
601                 /* drive was found */
602         }
603         if(!drive->present)
604                 return 0;
605         /* The drive wasn't being helpful. Add generic info only */
606         if (drive->id_read == 0) {
607                 generic_id(drive);
608                 return 1;
609         }
610
611         if (drive->media == ide_disk) {
612                 ide_disk_init_chs(drive);
613                 ide_disk_init_mult_count(drive);
614         }
615
616         return drive->present;
617 }
618
619 static void hwif_release_dev (struct device *dev)
620 {
621         ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
622
623         complete(&hwif->gendev_rel_comp);
624 }
625
626 static void ide_register_port(ide_hwif_t *hwif)
627 {
628         int ret;
629
630         /* register with global device tree */
631         strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE);
632         hwif->gendev.driver_data = hwif;
633         if (hwif->gendev.parent == NULL) {
634                 if (hwif->dev)
635                         hwif->gendev.parent = hwif->dev;
636                 else
637                         /* Would like to do = &device_legacy */
638                         hwif->gendev.parent = NULL;
639         }
640         hwif->gendev.release = hwif_release_dev;
641         ret = device_register(&hwif->gendev);
642         if (ret < 0)
643                 printk(KERN_WARNING "IDE: %s: device_register error: %d\n",
644                         __FUNCTION__, ret);
645 }
646
647 /**
648  *      ide_port_wait_ready     -       wait for port to become ready
649  *      @hwif: IDE port
650  *
651  *      This is needed on some PPCs and a bunch of BIOS-less embedded
652  *      platforms.  Typical cases are:
653  *
654  *      - The firmware hard reset the disk before booting the kernel,
655  *        the drive is still doing it's poweron-reset sequence, that
656  *        can take up to 30 seconds.
657  *
658  *      - The firmware does nothing (or no firmware), the device is
659  *        still in POST state (same as above actually).
660  *
661  *      - Some CD/DVD/Writer combo drives tend to drive the bus during
662  *        their reset sequence even when they are non-selected slave
663  *        devices, thus preventing discovery of the main HD.
664  *
665  *      Doing this wait-for-non-busy should not harm any existing
666  *      configuration and fix some issues like the above.
667  *
668  *      BenH.
669  *
670  *      Returns 0 on success, error code (< 0) otherwise.
671  */
672
673 static int ide_port_wait_ready(ide_hwif_t *hwif)
674 {
675         int unit, rc;
676
677         printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
678
679         /* Let HW settle down a bit from whatever init state we
680          * come from */
681         mdelay(2);
682
683         /* Wait for BSY bit to go away, spec timeout is 30 seconds,
684          * I know of at least one disk who takes 31 seconds, I use 35
685          * here to be safe
686          */
687         rc = ide_wait_not_busy(hwif, 35000);
688         if (rc)
689                 return rc;
690
691         /* Now make sure both master & slave are ready */
692         for (unit = 0; unit < MAX_DRIVES; unit++) {
693                 ide_drive_t *drive = &hwif->drives[unit];
694
695                 /* Ignore disks that we will not probe for later. */
696                 if (!drive->noprobe || drive->present) {
697                         SELECT_DRIVE(drive);
698                         ide_set_irq(drive, 1);
699                         mdelay(2);
700                         rc = ide_wait_not_busy(hwif, 35000);
701                         if (rc)
702                                 goto out;
703                 } else
704                         printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n",
705                                           drive->name);
706         }
707 out:
708         /* Exit function with master reselected (let's be sane) */
709         if (unit)
710                 SELECT_DRIVE(&hwif->drives[0]);
711
712         return rc;
713 }
714
715 /**
716  *      ide_undecoded_slave     -       look for bad CF adapters
717  *      @drive1: drive
718  *
719  *      Analyse the drives on the interface and attempt to decide if we
720  *      have the same drive viewed twice. This occurs with crap CF adapters
721  *      and PCMCIA sometimes.
722  */
723
724 void ide_undecoded_slave(ide_drive_t *drive1)
725 {
726         ide_drive_t *drive0 = &drive1->hwif->drives[0];
727
728         if ((drive1->dn & 1) == 0 || drive0->present == 0)
729                 return;
730
731         /* If the models don't match they are not the same product */
732         if (strcmp(drive0->id->model, drive1->id->model))
733                 return;
734
735         /* Serial numbers do not match */
736         if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20))
737                 return;
738
739         /* No serial number, thankfully very rare for CF */
740         if (drive0->id->serial_no[0] == 0)
741                 return;
742
743         /* Appears to be an IDE flash adapter with decode bugs */
744         printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
745
746         drive1->present = 0;
747 }
748
749 EXPORT_SYMBOL_GPL(ide_undecoded_slave);
750
751 static int ide_probe_port(ide_hwif_t *hwif)
752 {
753         unsigned long flags;
754         unsigned int irqd;
755         int unit, rc = -ENODEV;
756
757         BUG_ON(hwif->present);
758
759         if (hwif->noprobe)
760                 return -EACCES;
761
762         /*
763          * We must always disable IRQ, as probe_for_drive will assert IRQ, but
764          * we'll install our IRQ driver much later...
765          */
766         irqd = hwif->irq;
767         if (irqd)
768                 disable_irq(hwif->irq);
769
770         local_irq_set(flags);
771
772         if (ide_port_wait_ready(hwif) == -EBUSY)
773                 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
774
775         /*
776          * Need to probe slave device first to make it release PDIAG-.
777          */
778         for (unit = MAX_DRIVES - 1; unit >= 0; unit--) {
779                 ide_drive_t *drive = &hwif->drives[unit];
780                 drive->dn = (hwif->channel ? 2 : 0) + unit;
781                 (void) probe_for_drive(drive);
782                 if (drive->present)
783                         rc = 0;
784         }
785         if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) {
786                 printk(KERN_WARNING "%s: reset\n", hwif->name);
787                 hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]);
788                 udelay(10);
789                 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
790                 (void)ide_busy_sleep(hwif);
791         }
792         local_irq_restore(flags);
793         /*
794          * Use cached IRQ number. It might be (and is...) changed by probe
795          * code above
796          */
797         if (irqd)
798                 enable_irq(irqd);
799
800         return rc;
801 }
802
803 static void ide_port_tune_devices(ide_hwif_t *hwif)
804 {
805         int unit;
806
807         for (unit = 0; unit < MAX_DRIVES; unit++) {
808                 ide_drive_t *drive = &hwif->drives[unit];
809
810                 if (drive->present && hwif->quirkproc)
811                         hwif->quirkproc(drive);
812         }
813
814         for (unit = 0; unit < MAX_DRIVES; ++unit) {
815                 ide_drive_t *drive = &hwif->drives[unit];
816
817                 if (drive->present) {
818                         if (drive->autotune == IDE_TUNE_AUTO)
819                                 ide_set_max_pio(drive);
820
821                         if (drive->autotune != IDE_TUNE_DEFAULT &&
822                             drive->autotune != IDE_TUNE_AUTO)
823                                 continue;
824
825                         drive->nice1 = 1;
826
827                         if (hwif->dma_host_set)
828                                 ide_set_dma(drive);
829                 }
830         }
831
832         for (unit = 0; unit < MAX_DRIVES; ++unit) {
833                 ide_drive_t *drive = &hwif->drives[unit];
834
835                 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
836                         drive->no_io_32bit = 1;
837                 else
838                         drive->no_io_32bit = drive->id->dword_io ? 1 : 0;
839         }
840 }
841
842 #if MAX_HWIFS > 1
843 /*
844  * save_match() is used to simplify logic in init_irq() below.
845  *
846  * A loophole here is that we may not know about a particular
847  * hwif's irq until after that hwif is actually probed/initialized..
848  * This could be a problem for the case where an hwif is on a
849  * dual interface that requires serialization (eg. cmd640) and another
850  * hwif using one of the same irqs is initialized beforehand.
851  *
852  * This routine detects and reports such situations, but does not fix them.
853  */
854 static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
855 {
856         ide_hwif_t *m = *match;
857
858         if (m && m->hwgroup && m->hwgroup != new->hwgroup) {
859                 if (!new->hwgroup)
860                         return;
861                 printk("%s: potential irq problem with %s and %s\n",
862                         hwif->name, new->name, m->name);
863         }
864         if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */
865                 *match = new;
866 }
867 #endif /* MAX_HWIFS > 1 */
868
869 /*
870  * init request queue
871  */
872 static int ide_init_queue(ide_drive_t *drive)
873 {
874         struct request_queue *q;
875         ide_hwif_t *hwif = HWIF(drive);
876         int max_sectors = 256;
877         int max_sg_entries = PRD_ENTRIES;
878
879         /*
880          *      Our default set up assumes the normal IDE case,
881          *      that is 64K segmenting, standard PRD setup
882          *      and LBA28. Some drivers then impose their own
883          *      limits and LBA48 we could raise it but as yet
884          *      do not.
885          */
886
887         q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif));
888         if (!q)
889                 return 1;
890
891         q->queuedata = drive;
892         blk_queue_segment_boundary(q, 0xffff);
893
894         if (hwif->rqsize < max_sectors)
895                 max_sectors = hwif->rqsize;
896         blk_queue_max_sectors(q, max_sectors);
897
898 #ifdef CONFIG_PCI
899         /* When we have an IOMMU, we may have a problem where pci_map_sg()
900          * creates segments that don't completely match our boundary
901          * requirements and thus need to be broken up again. Because it
902          * doesn't align properly either, we may actually have to break up
903          * to more segments than what was we got in the first place, a max
904          * worst case is twice as many.
905          * This will be fixed once we teach pci_map_sg() about our boundary
906          * requirements, hopefully soon. *FIXME*
907          */
908         if (!PCI_DMA_BUS_IS_PHYS)
909                 max_sg_entries >>= 1;
910 #endif /* CONFIG_PCI */
911
912         blk_queue_max_hw_segments(q, max_sg_entries);
913         blk_queue_max_phys_segments(q, max_sg_entries);
914
915         /* assign drive queue */
916         drive->queue = q;
917
918         /* needs drive->queue to be set */
919         ide_toggle_bounce(drive, 1);
920
921         return 0;
922 }
923
924 static void ide_add_drive_to_hwgroup(ide_drive_t *drive)
925 {
926         ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
927
928         spin_lock_irq(&ide_lock);
929         if (!hwgroup->drive) {
930                 /* first drive for hwgroup. */
931                 drive->next = drive;
932                 hwgroup->drive = drive;
933                 hwgroup->hwif = HWIF(hwgroup->drive);
934         } else {
935                 drive->next = hwgroup->drive->next;
936                 hwgroup->drive->next = drive;
937         }
938         spin_unlock_irq(&ide_lock);
939 }
940
941 /*
942  * For any present drive:
943  * - allocate the block device queue
944  * - link drive into the hwgroup
945  */
946 static void ide_port_setup_devices(ide_hwif_t *hwif)
947 {
948         int i;
949
950         for (i = 0; i < MAX_DRIVES; i++) {
951                 ide_drive_t *drive = &hwif->drives[i];
952
953                 if (!drive->present)
954                         continue;
955
956                 if (ide_init_queue(drive)) {
957                         printk(KERN_ERR "ide: failed to init %s\n",
958                                         drive->name);
959                         continue;
960                 }
961
962                 ide_add_drive_to_hwgroup(drive);
963         }
964 }
965
966 /*
967  * This routine sets up the irq for an ide interface, and creates a new
968  * hwgroup for the irq/hwif if none was previously assigned.
969  *
970  * Much of the code is for correctly detecting/handling irq sharing
971  * and irq serialization situations.  This is somewhat complex because
972  * it handles static as well as dynamic (PCMCIA) IDE interfaces.
973  */
974 static int init_irq (ide_hwif_t *hwif)
975 {
976         unsigned int index;
977         ide_hwgroup_t *hwgroup;
978         ide_hwif_t *match = NULL;
979
980
981         BUG_ON(in_interrupt());
982         BUG_ON(irqs_disabled());        
983         BUG_ON(hwif == NULL);
984
985         mutex_lock(&ide_cfg_mtx);
986         hwif->hwgroup = NULL;
987 #if MAX_HWIFS > 1
988         /*
989          * Group up with any other hwifs that share our irq(s).
990          */
991         for (index = 0; index < MAX_HWIFS; index++) {
992                 ide_hwif_t *h = &ide_hwifs[index];
993                 if (h->hwgroup) {  /* scan only initialized hwif's */
994                         if (hwif->irq == h->irq) {
995                                 hwif->sharing_irq = h->sharing_irq = 1;
996                                 if (hwif->chipset != ide_pci ||
997                                     h->chipset != ide_pci) {
998                                         save_match(hwif, h, &match);
999                                 }
1000                         }
1001                         if (hwif->serialized) {
1002                                 if (hwif->mate && hwif->mate->irq == h->irq)
1003                                         save_match(hwif, h, &match);
1004                         }
1005                         if (h->serialized) {
1006                                 if (h->mate && hwif->irq == h->mate->irq)
1007                                         save_match(hwif, h, &match);
1008                         }
1009                 }
1010         }
1011 #endif /* MAX_HWIFS > 1 */
1012         /*
1013          * If we are still without a hwgroup, then form a new one
1014          */
1015         if (match) {
1016                 hwgroup = match->hwgroup;
1017                 hwif->hwgroup = hwgroup;
1018                 /*
1019                  * Link us into the hwgroup.
1020                  * This must be done early, do ensure that unexpected_intr
1021                  * can find the hwif and prevent irq storms.
1022                  * No drives are attached to the new hwif, choose_drive
1023                  * can't do anything stupid (yet).
1024                  * Add ourself as the 2nd entry to the hwgroup->hwif
1025                  * linked list, the first entry is the hwif that owns
1026                  * hwgroup->handler - do not change that.
1027                  */
1028                 spin_lock_irq(&ide_lock);
1029                 hwif->next = hwgroup->hwif->next;
1030                 hwgroup->hwif->next = hwif;
1031                 BUG_ON(hwif->next == hwif);
1032                 spin_unlock_irq(&ide_lock);
1033         } else {
1034                 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO,
1035                                        hwif_to_node(hwif));
1036                 if (hwgroup == NULL)
1037                         goto out_up;
1038
1039                 hwif->hwgroup = hwgroup;
1040                 hwgroup->hwif = hwif->next = hwif;
1041
1042                 init_timer(&hwgroup->timer);
1043                 hwgroup->timer.function = &ide_timer_expiry;
1044                 hwgroup->timer.data = (unsigned long) hwgroup;
1045         }
1046
1047         /*
1048          * Allocate the irq, if not already obtained for another hwif
1049          */
1050         if (!match || match->irq != hwif->irq) {
1051                 int sa = 0;
1052 #if defined(__mc68000__)
1053                 sa = IRQF_SHARED;
1054 #endif /* __mc68000__ || CONFIG_APUS */
1055
1056                 if (IDE_CHIPSET_IS_PCI(hwif->chipset))
1057                         sa = IRQF_SHARED;
1058
1059                 if (hwif->io_ports[IDE_CONTROL_OFFSET])
1060                         /* clear nIEN */
1061                         hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]);
1062
1063                 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup))
1064                         goto out_unlink;
1065         }
1066
1067         if (!hwif->rqsize) {
1068                 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
1069                     (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
1070                         hwif->rqsize = 256;
1071                 else
1072                         hwif->rqsize = 65536;
1073         }
1074
1075 #if !defined(__mc68000__)
1076         printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
1077                 hwif->io_ports[IDE_DATA_OFFSET],
1078                 hwif->io_ports[IDE_DATA_OFFSET]+7,
1079                 hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq);
1080 #else
1081         printk("%s at 0x%08lx on irq %d", hwif->name,
1082                 hwif->io_ports[IDE_DATA_OFFSET], hwif->irq);
1083 #endif /* __mc68000__ */
1084         if (match)
1085                 printk(" (%sed with %s)",
1086                         hwif->sharing_irq ? "shar" : "serializ", match->name);
1087         printk("\n");
1088
1089         ide_port_setup_devices(hwif);
1090
1091         mutex_unlock(&ide_cfg_mtx);
1092         return 0;
1093 out_unlink:
1094         ide_remove_port_from_hwgroup(hwif);
1095 out_up:
1096         mutex_unlock(&ide_cfg_mtx);
1097         return 1;
1098 }
1099
1100 static int ata_lock(dev_t dev, void *data)
1101 {
1102         /* FIXME: we want to pin hwif down */
1103         return 0;
1104 }
1105
1106 static struct kobject *ata_probe(dev_t dev, int *part, void *data)
1107 {
1108         ide_hwif_t *hwif = data;
1109         int unit = *part >> PARTN_BITS;
1110         ide_drive_t *drive = &hwif->drives[unit];
1111         if (!drive->present)
1112                 return NULL;
1113
1114         if (drive->media == ide_disk)
1115                 request_module("ide-disk");
1116         if (drive->scsi)
1117                 request_module("ide-scsi");
1118         if (drive->media == ide_cdrom || drive->media == ide_optical)
1119                 request_module("ide-cd");
1120         if (drive->media == ide_tape)
1121                 request_module("ide-tape");
1122         if (drive->media == ide_floppy)
1123                 request_module("ide-floppy");
1124
1125         return NULL;
1126 }
1127
1128 static struct kobject *exact_match(dev_t dev, int *part, void *data)
1129 {
1130         struct gendisk *p = data;
1131         *part &= (1 << PARTN_BITS) - 1;
1132         return &p->dev.kobj;
1133 }
1134
1135 static int exact_lock(dev_t dev, void *data)
1136 {
1137         struct gendisk *p = data;
1138
1139         if (!get_disk(p))
1140                 return -1;
1141         return 0;
1142 }
1143
1144 void ide_register_region(struct gendisk *disk)
1145 {
1146         blk_register_region(MKDEV(disk->major, disk->first_minor),
1147                             disk->minors, NULL, exact_match, exact_lock, disk);
1148 }
1149
1150 EXPORT_SYMBOL_GPL(ide_register_region);
1151
1152 void ide_unregister_region(struct gendisk *disk)
1153 {
1154         blk_unregister_region(MKDEV(disk->major, disk->first_minor),
1155                               disk->minors);
1156 }
1157
1158 EXPORT_SYMBOL_GPL(ide_unregister_region);
1159
1160 void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
1161 {
1162         ide_hwif_t *hwif = drive->hwif;
1163         unsigned int unit = (drive->select.all >> 4) & 1;
1164
1165         disk->major = hwif->major;
1166         disk->first_minor = unit << PARTN_BITS;
1167         sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
1168         disk->queue = drive->queue;
1169 }
1170
1171 EXPORT_SYMBOL_GPL(ide_init_disk);
1172
1173 static void ide_remove_drive_from_hwgroup(ide_drive_t *drive)
1174 {
1175         ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
1176
1177         if (drive == drive->next) {
1178                 /* special case: last drive from hwgroup. */
1179                 BUG_ON(hwgroup->drive != drive);
1180                 hwgroup->drive = NULL;
1181         } else {
1182                 ide_drive_t *walk;
1183
1184                 walk = hwgroup->drive;
1185                 while (walk->next != drive)
1186                         walk = walk->next;
1187                 walk->next = drive->next;
1188                 if (hwgroup->drive == drive) {
1189                         hwgroup->drive = drive->next;
1190                         hwgroup->hwif = hwgroup->drive->hwif;
1191                 }
1192         }
1193         BUG_ON(hwgroup->drive == drive);
1194 }
1195
1196 static void drive_release_dev (struct device *dev)
1197 {
1198         ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
1199
1200         spin_lock_irq(&ide_lock);
1201         ide_remove_drive_from_hwgroup(drive);
1202         kfree(drive->id);
1203         drive->id = NULL;
1204         drive->present = 0;
1205         /* Messed up locking ... */
1206         spin_unlock_irq(&ide_lock);
1207         blk_cleanup_queue(drive->queue);
1208         spin_lock_irq(&ide_lock);
1209         drive->queue = NULL;
1210         spin_unlock_irq(&ide_lock);
1211
1212         complete(&drive->gendev_rel_comp);
1213 }
1214
1215 static int hwif_init(ide_hwif_t *hwif)
1216 {
1217         int old_irq;
1218
1219         if (!hwif->irq) {
1220                 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET])))
1221                 {
1222                         printk("%s: DISABLED, NO IRQ\n", hwif->name);
1223                         return 0;
1224                 }
1225         }
1226 #ifdef CONFIG_BLK_DEV_HD
1227         if (hwif->irq == HD_IRQ && hwif->io_ports[IDE_DATA_OFFSET] != HD_DATA) {
1228                 printk("%s: CANNOT SHARE IRQ WITH OLD "
1229                         "HARDDISK DRIVER (hd.c)\n", hwif->name);
1230                 return 0;
1231         }
1232 #endif /* CONFIG_BLK_DEV_HD */
1233
1234         if (register_blkdev(hwif->major, hwif->name))
1235                 return 0;
1236
1237         if (!hwif->sg_max_nents)
1238                 hwif->sg_max_nents = PRD_ENTRIES;
1239
1240         hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
1241                                  GFP_KERNEL);
1242         if (!hwif->sg_table) {
1243                 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
1244                 goto out;
1245         }
1246
1247         sg_init_table(hwif->sg_table, hwif->sg_max_nents);
1248         
1249         if (init_irq(hwif) == 0)
1250                 goto done;
1251
1252         old_irq = hwif->irq;
1253         /*
1254          *      It failed to initialise. Find the default IRQ for 
1255          *      this port and try that.
1256          */
1257         if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) {
1258                 printk("%s: Disabled unable to get IRQ %d.\n",
1259                         hwif->name, old_irq);
1260                 goto out;
1261         }
1262         if (init_irq(hwif)) {
1263                 printk("%s: probed IRQ %d and default IRQ %d failed.\n",
1264                         hwif->name, old_irq, hwif->irq);
1265                 goto out;
1266         }
1267         printk("%s: probed IRQ %d failed, using default.\n",
1268                 hwif->name, hwif->irq);
1269
1270 done:
1271         blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
1272                             THIS_MODULE, ata_probe, ata_lock, hwif);
1273         return 1;
1274
1275 out:
1276         unregister_blkdev(hwif->major, hwif->name);
1277         return 0;
1278 }
1279
1280 static void hwif_register_devices(ide_hwif_t *hwif)
1281 {
1282         unsigned int i;
1283
1284         for (i = 0; i < MAX_DRIVES; i++) {
1285                 ide_drive_t *drive = &hwif->drives[i];
1286                 struct device *dev = &drive->gendev;
1287                 int ret;
1288
1289                 if (!drive->present)
1290                         continue;
1291
1292                 ide_add_generic_settings(drive);
1293
1294                 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i);
1295                 dev->parent = &hwif->gendev;
1296                 dev->bus = &ide_bus_type;
1297                 dev->driver_data = drive;
1298                 dev->release = drive_release_dev;
1299
1300                 ret = device_register(dev);
1301                 if (ret < 0)
1302                         printk(KERN_WARNING "IDE: %s: device_register error: "
1303                                             "%d\n", __func__, ret);
1304         }
1305 }
1306
1307 static void ide_port_init_devices(ide_hwif_t *hwif)
1308 {
1309         int i;
1310
1311         for (i = 0; i < MAX_DRIVES; i++) {
1312                 ide_drive_t *drive = &hwif->drives[i];
1313
1314                 if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
1315                         drive->io_32bit = 1;
1316                 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS)
1317                         drive->unmask = 1;
1318                 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
1319                         drive->no_unmask = 1;
1320                 if ((hwif->host_flags & IDE_HFLAG_NO_AUTOTUNE) == 0)
1321                         drive->autotune = 1;
1322         }
1323
1324         if (hwif->port_init_devs)
1325                 hwif->port_init_devs(hwif);
1326 }
1327
1328 static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
1329                           const struct ide_port_info *d)
1330 {
1331         if (d->chipset != ide_etrax100)
1332                 hwif->channel = port;
1333
1334         if (d->chipset)
1335                 hwif->chipset = d->chipset;
1336
1337         if (d->init_iops)
1338                 d->init_iops(hwif);
1339
1340         if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0)
1341                 ide_hwif_setup_dma(hwif, d);
1342
1343         if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) ||
1344             (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS))
1345                 hwif->irq = port ? 15 : 14;
1346
1347         hwif->host_flags = d->host_flags;
1348         hwif->pio_mask = d->pio_mask;
1349
1350         if ((d->host_flags & IDE_HFLAG_SERIALIZE) && hwif->mate)
1351                 hwif->mate->serialized = hwif->serialized = 1;
1352
1353         hwif->swdma_mask = d->swdma_mask;
1354         hwif->mwdma_mask = d->mwdma_mask;
1355         hwif->ultra_mask = d->udma_mask;
1356
1357         /* reset DMA masks only for SFF-style DMA controllers */
1358         if ((d->host_flags && IDE_HFLAG_NO_DMA) == 0 && hwif->dma_base == 0)
1359                 hwif->swdma_mask = hwif->mwdma_mask = hwif->ultra_mask = 0;
1360
1361         if (d->host_flags & IDE_HFLAG_RQSIZE_256)
1362                 hwif->rqsize = 256;
1363
1364         /* call chipset specific routine for each enabled port */
1365         if (d->init_hwif)
1366                 d->init_hwif(hwif);
1367
1368         if (hwif->cable_detect && (hwif->ultra_mask & 0x78)) {
1369                 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
1370                         hwif->cbl = hwif->cable_detect(hwif);
1371         }
1372 }
1373
1374 int ide_device_add_all(u8 *idx, const struct ide_port_info *d)
1375 {
1376         ide_hwif_t *hwif, *mate = NULL;
1377         int i, rc = 0;
1378
1379         for (i = 0; i < MAX_HWIFS; i++) {
1380                 if (d == NULL || idx[i] == 0xff) {
1381                         mate = NULL;
1382                         continue;
1383                 }
1384
1385                 hwif = &ide_hwifs[idx[i]];
1386
1387                 if (d->chipset != ide_etrax100 && (i & 1) && mate) {
1388                         hwif->mate = mate;
1389                         mate->mate = hwif;
1390                 }
1391
1392                 mate = (i & 1) ? NULL : hwif;
1393
1394                 ide_init_port(hwif, i & 1, d);
1395                 ide_port_init_devices(hwif);
1396         }
1397
1398         for (i = 0; i < MAX_HWIFS; i++) {
1399                 if (idx[i] == 0xff)
1400                         continue;
1401
1402                 hwif = &ide_hwifs[idx[i]];
1403
1404                 if ((hwif->chipset != ide_4drives || !hwif->mate ||
1405                      !hwif->mate->present) && ide_hwif_request_regions(hwif)) {
1406                         printk(KERN_ERR "%s: ports already in use, "
1407                                         "skipping probe\n", hwif->name);
1408                         continue;
1409                 }
1410
1411                 if (ide_probe_port(hwif) < 0) {
1412                         ide_hwif_release_regions(hwif);
1413                         continue;
1414                 }
1415
1416                 hwif->present = 1;
1417
1418                 if (hwif->chipset != ide_4drives || !hwif->mate ||
1419                     !hwif->mate->present)
1420                         ide_register_port(hwif);
1421
1422                 ide_port_tune_devices(hwif);
1423         }
1424
1425         for (i = 0; i < MAX_HWIFS; i++) {
1426                 if (idx[i] == 0xff)
1427                         continue;
1428
1429                 hwif = &ide_hwifs[idx[i]];
1430
1431                 if (!hwif->present)
1432                         continue;
1433
1434                 if (hwif_init(hwif) == 0) {
1435                         printk(KERN_INFO "%s: failed to initialize IDE "
1436                                          "interface\n", hwif->name);
1437                         hwif->present = 0;
1438                         rc = -1;
1439                         continue;
1440                 }
1441
1442                 ide_acpi_init(hwif);
1443                 ide_acpi_port_init_devices(hwif);
1444         }
1445
1446         for (i = 0; i < MAX_HWIFS; i++) {
1447                 if (idx[i] == 0xff)
1448                         continue;
1449
1450                 hwif = &ide_hwifs[idx[i]];
1451
1452                 if (hwif->present) {
1453                         if (hwif->chipset == ide_unknown ||
1454                             hwif->chipset == ide_forced)
1455                                 hwif->chipset = ide_generic;
1456                         hwif_register_devices(hwif);
1457                 }
1458         }
1459
1460         for (i = 0; i < MAX_HWIFS; i++) {
1461                 if (idx[i] == 0xff)
1462                         continue;
1463
1464                 hwif = &ide_hwifs[idx[i]];
1465
1466                 if (hwif->present) {
1467                         ide_proc_register_port(hwif);
1468                         ide_proc_port_register_devices(hwif);
1469                 }
1470         }
1471
1472         return rc;
1473 }
1474 EXPORT_SYMBOL_GPL(ide_device_add_all);
1475
1476 int ide_device_add(u8 idx[4], const struct ide_port_info *d)
1477 {
1478         u8 idx_all[MAX_HWIFS];
1479         int i;
1480
1481         for (i = 0; i < MAX_HWIFS; i++)
1482                 idx_all[i] = (i < 4) ? idx[i] : 0xff;
1483
1484         return ide_device_add_all(idx_all, d);
1485 }
1486 EXPORT_SYMBOL_GPL(ide_device_add);