Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen...
[linux-2.6] / drivers / ide / ide.c
1 /*
2  *  Copyright (C) 1994-1998         Linus Torvalds & authors (see below)
3  *  Copyrifht (C) 2003-2005, 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 multiple IDE interface driver, as evolved from hd.c.
14  * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
15  *   (usually 14 & 15).
16  * There can be up to two drives per interface, as per the ATA-2 spec.
17  *
18  * ...
19  *
20  *  From hd.c:
21  *  |
22  *  | It traverses the request-list, using interrupts to jump between functions.
23  *  | As nearly all functions can be called within interrupts, we may not sleep.
24  *  | Special care is recommended.  Have Fun!
25  *  |
26  *  | modified by Drew Eckhardt to check nr of hd's from the CMOS.
27  *  |
28  *  | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
29  *  | in the early extended-partition checks and added DM partitions.
30  *  |
31  *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
32  *  |
33  *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
34  *  | and general streamlining by Mark Lord (mlord@pobox.com).
35  *
36  *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
37  *
38  *      Mark Lord       (mlord@pobox.com)               (IDE Perf.Pkg)
39  *      Delman Lee      (delman@ieee.org)               ("Mr. atdisk2")
40  *      Scott Snyder    (snyder@fnald0.fnal.gov)        (ATAPI IDE cd-rom)
41  *
42  *  This was a rewrite of just about everything from hd.c, though some original
43  *  code is still sprinkled about.  Think of it as a major evolution, with
44  *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
45  */
46
47 #define _IDE_C                  /* Tell ide.h it's really us */
48
49 #include <linux/module.h>
50 #include <linux/types.h>
51 #include <linux/string.h>
52 #include <linux/kernel.h>
53 #include <linux/timer.h>
54 #include <linux/mm.h>
55 #include <linux/interrupt.h>
56 #include <linux/major.h>
57 #include <linux/errno.h>
58 #include <linux/genhd.h>
59 #include <linux/blkpg.h>
60 #include <linux/slab.h>
61 #include <linux/init.h>
62 #include <linux/pci.h>
63 #include <linux/delay.h>
64 #include <linux/ide.h>
65 #include <linux/completion.h>
66 #include <linux/reboot.h>
67 #include <linux/cdrom.h>
68 #include <linux/seq_file.h>
69 #include <linux/device.h>
70 #include <linux/bitops.h>
71
72 #include <asm/byteorder.h>
73 #include <asm/irq.h>
74 #include <asm/uaccess.h>
75 #include <asm/io.h>
76
77
78 /* default maximum number of failures */
79 #define IDE_DEFAULT_MAX_FAILURES        1
80
81 struct class *ide_port_class;
82
83 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
84                                         IDE2_MAJOR, IDE3_MAJOR,
85                                         IDE4_MAJOR, IDE5_MAJOR,
86                                         IDE6_MAJOR, IDE7_MAJOR,
87                                         IDE8_MAJOR, IDE9_MAJOR };
88
89 static int idebus_parameter;    /* holds the "idebus=" parameter */
90 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
91
92 DEFINE_MUTEX(ide_cfg_mtx);
93  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
94
95 int noautodma = 0;
96
97 #ifdef CONFIG_BLK_DEV_IDEACPI
98 int ide_noacpi = 0;
99 int ide_noacpitfs = 1;
100 int ide_noacpionboot = 1;
101 #endif
102
103 /*
104  * This is declared extern in ide.h, for access by other IDE modules:
105  */
106 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
107
108 EXPORT_SYMBOL(ide_hwifs);
109
110 static void ide_port_init_devices_data(ide_hwif_t *);
111
112 /*
113  * Do not even *think* about calling this!
114  */
115 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
116 {
117         /* bulk initialize hwif & drive info with zeros */
118         memset(hwif, 0, sizeof(ide_hwif_t));
119
120         /* fill in any non-zero initial values */
121         hwif->index     = index;
122         hwif->major     = ide_hwif_to_major[index];
123
124         hwif->name[0]   = 'i';
125         hwif->name[1]   = 'd';
126         hwif->name[2]   = 'e';
127         hwif->name[3]   = '0' + index;
128
129         hwif->bus_state = BUSSTATE_ON;
130
131         init_completion(&hwif->gendev_rel_comp);
132
133         default_hwif_iops(hwif);
134         default_hwif_transport(hwif);
135
136         ide_port_init_devices_data(hwif);
137 }
138 EXPORT_SYMBOL_GPL(ide_init_port_data);
139
140 static void ide_port_init_devices_data(ide_hwif_t *hwif)
141 {
142         int unit;
143
144         for (unit = 0; unit < MAX_DRIVES; ++unit) {
145                 ide_drive_t *drive = &hwif->drives[unit];
146                 u8 j = (hwif->index * MAX_DRIVES) + unit;
147
148                 memset(drive, 0, sizeof(*drive));
149
150                 drive->media                    = ide_disk;
151                 drive->select.all               = (unit<<4)|0xa0;
152                 drive->hwif                     = hwif;
153                 drive->ctl                      = 0x08;
154                 drive->ready_stat               = READY_STAT;
155                 drive->bad_wstat                = BAD_W_STAT;
156                 drive->special.b.recalibrate    = 1;
157                 drive->special.b.set_geometry   = 1;
158                 drive->name[0]                  = 'h';
159                 drive->name[1]                  = 'd';
160                 drive->name[2]                  = 'a' + j;
161                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
162
163                 INIT_LIST_HEAD(&drive->list);
164                 init_completion(&drive->gendev_rel_comp);
165         }
166 }
167
168 /*
169  * init_ide_data() sets reasonable default values into all fields
170  * of all instances of the hwifs and drives, but only on the first call.
171  * Subsequent calls have no effect (they don't wipe out anything).
172  *
173  * This routine is normally called at driver initialization time,
174  * but may also be called MUCH earlier during kernel "command-line"
175  * parameter processing.  As such, we cannot depend on any other parts
176  * of the kernel (such as memory allocation) to be functioning yet.
177  *
178  * This is too bad, as otherwise we could dynamically allocate the
179  * ide_drive_t structs as needed, rather than always consuming memory
180  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
181  *
182  * FIXME: We should stuff the setup data into __init and copy the
183  * relevant hwifs/allocate them properly during boot.
184  */
185 #define MAGIC_COOKIE 0x12345678
186 static void __init init_ide_data (void)
187 {
188         unsigned int index;
189         static unsigned long magic_cookie = MAGIC_COOKIE;
190
191         if (magic_cookie != MAGIC_COOKIE)
192                 return;         /* already initialized */
193         magic_cookie = 0;
194
195         /* Initialise all interface structures */
196         for (index = 0; index < MAX_HWIFS; ++index) {
197                 ide_hwif_t *hwif = &ide_hwifs[index];
198
199                 ide_init_port_data(hwif, index);
200         }
201 }
202
203 /**
204  *      ide_system_bus_speed    -       guess bus speed
205  *
206  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
207  *      bus speed (in MHz). This is used for calculating interface PIO timings.
208  *      The default is 40 for known PCI systems, 50 otherwise.
209  *      The "idebus=xx" parameter can be used to override this value.
210  *      The actual value to be used is computed/displayed the first time
211  *      through. Drivers should only use this as a last resort.
212  *
213  *      Returns a guessed speed in MHz.
214  */
215
216 static int ide_system_bus_speed(void)
217 {
218 #ifdef CONFIG_PCI
219         static struct pci_device_id pci_default[] = {
220                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
221                 { }
222         };
223 #else
224 #define pci_default 0
225 #endif /* CONFIG_PCI */
226
227         /* user supplied value */
228         if (idebus_parameter)
229                 return idebus_parameter;
230
231         /* safe default value for PCI or VESA and PCI*/
232         return pci_dev_present(pci_default) ? 33 : 50;
233 }
234
235 ide_hwif_t * ide_find_port(unsigned long base)
236 {
237         ide_hwif_t *hwif;
238         int i;
239
240         for (i = 0; i < MAX_HWIFS; i++) {
241                 hwif = &ide_hwifs[i];
242                 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
243                         goto found;
244         }
245
246         for (i = 0; i < MAX_HWIFS; i++) {
247                 hwif = &ide_hwifs[i];
248                 if (hwif->chipset == ide_unknown)
249                         goto found;
250         }
251
252         hwif = NULL;
253 found:
254         return hwif;
255 }
256
257 EXPORT_SYMBOL_GPL(ide_find_port);
258
259 static struct resource* hwif_request_region(ide_hwif_t *hwif,
260                                             unsigned long addr, int num)
261 {
262         struct resource *res = request_region(addr, num, hwif->name);
263
264         if (!res)
265                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
266                                 hwif->name, addr, addr+num-1);
267         return res;
268 }
269
270 /**
271  *      ide_hwif_request_regions - request resources for IDE
272  *      @hwif: interface to use
273  *
274  *      Requests all the needed resources for an interface.
275  *      Right now core IDE code does this work which is deeply wrong.
276  *      MMIO leaves it to the controller driver,
277  *      PIO will migrate this way over time.
278  */
279
280 int ide_hwif_request_regions(ide_hwif_t *hwif)
281 {
282         unsigned long addr;
283         unsigned int i;
284
285         if (hwif->mmio)
286                 return 0;
287         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
288         if (addr && !hwif_request_region(hwif, addr, 1))
289                 goto control_region_busy;
290         hwif->straight8 = 0;
291         addr = hwif->io_ports[IDE_DATA_OFFSET];
292         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
293                 if (!hwif_request_region(hwif, addr, 8))
294                         goto data_region_busy;
295                 hwif->straight8 = 1;
296                 return 0;
297         }
298         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
299                 addr = hwif->io_ports[i];
300                 if (!hwif_request_region(hwif, addr, 1)) {
301                         while (--i)
302                                 release_region(addr, 1);
303                         goto data_region_busy;
304                 }
305         }
306         return 0;
307
308 data_region_busy:
309         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
310         if (addr)
311                 release_region(addr, 1);
312 control_region_busy:
313         /* If any errors are return, we drop the hwif interface. */
314         return -EBUSY;
315 }
316
317 /**
318  *      ide_hwif_release_regions - free IDE resources
319  *
320  *      Note that we only release the standard ports,
321  *      and do not even try to handle any extra ports
322  *      allocated for weird IDE interface chipsets.
323  *
324  *      Note also that we don't yet handle mmio resources here. More
325  *      importantly our caller should be doing this so we need to 
326  *      restructure this as a helper function for drivers.
327  */
328
329 void ide_hwif_release_regions(ide_hwif_t *hwif)
330 {
331         u32 i = 0;
332
333         if (hwif->mmio)
334                 return;
335         if (hwif->io_ports[IDE_CONTROL_OFFSET])
336                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
337         if (hwif->straight8) {
338                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
339                 return;
340         }
341         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
342                 if (hwif->io_ports[i])
343                         release_region(hwif->io_ports[i], 1);
344 }
345
346 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
347 {
348         ide_hwgroup_t *hwgroup = hwif->hwgroup;
349
350         spin_lock_irq(&ide_lock);
351         /*
352          * Remove us from the hwgroup, and free
353          * the hwgroup if we were the only member
354          */
355         if (hwif->next == hwif) {
356                 BUG_ON(hwgroup->hwif != hwif);
357                 kfree(hwgroup);
358         } else {
359                 /* There is another interface in hwgroup.
360                  * Unlink us, and set hwgroup->drive and ->hwif to
361                  * something sane.
362                  */
363                 ide_hwif_t *g = hwgroup->hwif;
364
365                 while (g->next != hwif)
366                         g = g->next;
367                 g->next = hwif->next;
368                 if (hwgroup->hwif == hwif) {
369                         /* Chose a random hwif for hwgroup->hwif.
370                          * It's guaranteed that there are no drives
371                          * left in the hwgroup.
372                          */
373                         BUG_ON(hwgroup->drive != NULL);
374                         hwgroup->hwif = g;
375                 }
376                 BUG_ON(hwgroup->hwif == hwif);
377         }
378         spin_unlock_irq(&ide_lock);
379 }
380
381 /* Called with ide_lock held. */
382 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
383 {
384         int i;
385
386         for (i = 0; i < MAX_DRIVES; i++) {
387                 ide_drive_t *drive = &hwif->drives[i];
388
389                 if (drive->present) {
390                         spin_unlock_irq(&ide_lock);
391                         device_unregister(&drive->gendev);
392                         wait_for_completion(&drive->gendev_rel_comp);
393                         spin_lock_irq(&ide_lock);
394                 }
395         }
396 }
397
398 void ide_port_unregister_devices(ide_hwif_t *hwif)
399 {
400         mutex_lock(&ide_cfg_mtx);
401         spin_lock_irq(&ide_lock);
402         __ide_port_unregister_devices(hwif);
403         hwif->present = 0;
404         ide_port_init_devices_data(hwif);
405         spin_unlock_irq(&ide_lock);
406         mutex_unlock(&ide_cfg_mtx);
407 }
408 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
409
410 /**
411  *      ide_unregister          -       free an IDE interface
412  *      @index: index of interface (will change soon to a pointer)
413  *
414  *      Perform the final unregister of an IDE interface. At the moment
415  *      we don't refcount interfaces so this will also get split up.
416  *
417  *      Locking:
418  *      The caller must not hold the IDE locks
419  *      The drive present/vanishing is not yet properly locked
420  *      Take care with the callbacks. These have been split to avoid
421  *      deadlocking the IDE layer. The shutdown callback is called
422  *      before we take the lock and free resources. It is up to the
423  *      caller to be sure there is no pending I/O here, and that
424  *      the interface will not be reopened (present/vanishing locking
425  *      isn't yet done BTW). After we commit to the final kill we
426  *      call the cleanup callback with the ide locks held.
427  *
428  *      Unregister restores the hwif structures to the default state.
429  *      This is raving bonkers.
430  */
431
432 void ide_unregister(unsigned int index)
433 {
434         ide_hwif_t *hwif, *g;
435         ide_hwgroup_t *hwgroup;
436         int irq_count = 0;
437
438         BUG_ON(index >= MAX_HWIFS);
439
440         BUG_ON(in_interrupt());
441         BUG_ON(irqs_disabled());
442         mutex_lock(&ide_cfg_mtx);
443         spin_lock_irq(&ide_lock);
444         hwif = &ide_hwifs[index];
445         if (!hwif->present)
446                 goto abort;
447         __ide_port_unregister_devices(hwif);
448         hwif->present = 0;
449
450         spin_unlock_irq(&ide_lock);
451
452         ide_proc_unregister_port(hwif);
453
454         hwgroup = hwif->hwgroup;
455         /*
456          * free the irq if we were the only hwif using it
457          */
458         g = hwgroup->hwif;
459         do {
460                 if (g->irq == hwif->irq)
461                         ++irq_count;
462                 g = g->next;
463         } while (g != hwgroup->hwif);
464         if (irq_count == 1)
465                 free_irq(hwif->irq, hwgroup);
466
467         ide_remove_port_from_hwgroup(hwif);
468
469         device_unregister(hwif->portdev);
470         device_unregister(&hwif->gendev);
471         wait_for_completion(&hwif->gendev_rel_comp);
472
473         /*
474          * Remove us from the kernel's knowledge
475          */
476         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
477         kfree(hwif->sg_table);
478         unregister_blkdev(hwif->major, hwif->name);
479         spin_lock_irq(&ide_lock);
480
481         if (hwif->dma_base)
482                 (void)ide_release_dma(hwif);
483
484         ide_hwif_release_regions(hwif);
485
486         /* restore hwif data to pristine status */
487         ide_init_port_data(hwif, index);
488
489 abort:
490         spin_unlock_irq(&ide_lock);
491         mutex_unlock(&ide_cfg_mtx);
492 }
493
494 EXPORT_SYMBOL(ide_unregister);
495
496 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
497 {
498         memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
499         hwif->irq = hw->irq;
500         hwif->noprobe = 0;
501         hwif->chipset = hw->chipset;
502         hwif->gendev.parent = hw->dev;
503         hwif->ack_intr = hw->ack_intr;
504 }
505 EXPORT_SYMBOL_GPL(ide_init_port_hw);
506
507 /*
508  *      Locks for IDE setting functionality
509  */
510
511 DEFINE_MUTEX(ide_setting_mtx);
512
513 EXPORT_SYMBOL_GPL(ide_setting_mtx);
514
515 /**
516  *      ide_spin_wait_hwgroup   -       wait for group
517  *      @drive: drive in the group
518  *
519  *      Wait for an IDE device group to go non busy and then return
520  *      holding the ide_lock which guards the hwgroup->busy status
521  *      and right to use it.
522  */
523
524 int ide_spin_wait_hwgroup (ide_drive_t *drive)
525 {
526         ide_hwgroup_t *hwgroup = HWGROUP(drive);
527         unsigned long timeout = jiffies + (3 * HZ);
528
529         spin_lock_irq(&ide_lock);
530
531         while (hwgroup->busy) {
532                 unsigned long lflags;
533                 spin_unlock_irq(&ide_lock);
534                 local_irq_set(lflags);
535                 if (time_after(jiffies, timeout)) {
536                         local_irq_restore(lflags);
537                         printk(KERN_ERR "%s: channel busy\n", drive->name);
538                         return -EBUSY;
539                 }
540                 local_irq_restore(lflags);
541                 spin_lock_irq(&ide_lock);
542         }
543         return 0;
544 }
545
546 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
547
548 int set_io_32bit(ide_drive_t *drive, int arg)
549 {
550         if (drive->no_io_32bit)
551                 return -EPERM;
552
553         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
554                 return -EINVAL;
555
556         if (ide_spin_wait_hwgroup(drive))
557                 return -EBUSY;
558
559         drive->io_32bit = arg;
560
561         spin_unlock_irq(&ide_lock);
562
563         return 0;
564 }
565
566 static int set_ksettings(ide_drive_t *drive, int arg)
567 {
568         if (arg < 0 || arg > 1)
569                 return -EINVAL;
570
571         if (ide_spin_wait_hwgroup(drive))
572                 return -EBUSY;
573         drive->keep_settings = arg;
574         spin_unlock_irq(&ide_lock);
575
576         return 0;
577 }
578
579 int set_using_dma(ide_drive_t *drive, int arg)
580 {
581 #ifdef CONFIG_BLK_DEV_IDEDMA
582         ide_hwif_t *hwif = drive->hwif;
583         int err = -EPERM;
584
585         if (arg < 0 || arg > 1)
586                 return -EINVAL;
587
588         if (!drive->id || !(drive->id->capability & 1))
589                 goto out;
590
591         if (hwif->dma_host_set == NULL)
592                 goto out;
593
594         err = -EBUSY;
595         if (ide_spin_wait_hwgroup(drive))
596                 goto out;
597         /*
598          * set ->busy flag, unlock and let it ride
599          */
600         hwif->hwgroup->busy = 1;
601         spin_unlock_irq(&ide_lock);
602
603         err = 0;
604
605         if (arg) {
606                 if (ide_set_dma(drive))
607                         err = -EIO;
608         } else
609                 ide_dma_off(drive);
610
611         /*
612          * lock, clear ->busy flag and unlock before leaving
613          */
614         spin_lock_irq(&ide_lock);
615         hwif->hwgroup->busy = 0;
616         spin_unlock_irq(&ide_lock);
617 out:
618         return err;
619 #else
620         if (arg < 0 || arg > 1)
621                 return -EINVAL;
622
623         return -EPERM;
624 #endif
625 }
626
627 int set_pio_mode(ide_drive_t *drive, int arg)
628 {
629         struct request rq;
630
631         if (arg < 0 || arg > 255)
632                 return -EINVAL;
633
634         if (drive->hwif->set_pio_mode == NULL)
635                 return -ENOSYS;
636
637         if (drive->special.b.set_tune)
638                 return -EBUSY;
639
640         ide_init_drive_cmd(&rq);
641         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
642
643         drive->tune_req = (u8) arg;
644         drive->special.b.set_tune = 1;
645         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
646         return 0;
647 }
648
649 static int set_unmaskirq(ide_drive_t *drive, int arg)
650 {
651         if (drive->no_unmask)
652                 return -EPERM;
653
654         if (arg < 0 || arg > 1)
655                 return -EINVAL;
656
657         if (ide_spin_wait_hwgroup(drive))
658                 return -EBUSY;
659         drive->unmask = arg;
660         spin_unlock_irq(&ide_lock);
661
662         return 0;
663 }
664
665 /**
666  *      system_bus_clock        -       clock guess
667  *
668  *      External version of the bus clock guess used by very old IDE drivers
669  *      for things like VLB timings. Should not be used.
670  */
671
672 int system_bus_clock (void)
673 {
674         return system_bus_speed;
675 }
676
677 EXPORT_SYMBOL(system_bus_clock);
678
679 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
680 {
681         ide_drive_t *drive = dev->driver_data;
682         ide_hwif_t *hwif = HWIF(drive);
683         struct request rq;
684         struct request_pm_state rqpm;
685         ide_task_t args;
686         int ret;
687
688         /* Call ACPI _GTM only once */
689         if (!(drive->dn % 2))
690                 ide_acpi_get_timing(hwif);
691
692         memset(&rq, 0, sizeof(rq));
693         memset(&rqpm, 0, sizeof(rqpm));
694         memset(&args, 0, sizeof(args));
695         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
696         rq.special = &args;
697         rq.data = &rqpm;
698         rqpm.pm_step = ide_pm_state_start_suspend;
699         if (mesg.event == PM_EVENT_PRETHAW)
700                 mesg.event = PM_EVENT_FREEZE;
701         rqpm.pm_state = mesg.event;
702
703         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
704         /* only call ACPI _PS3 after both drivers are suspended */
705         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
706                  && hwif->drives[1].present)
707                  || !hwif->drives[0].present
708                  || !hwif->drives[1].present))
709                 ide_acpi_set_state(hwif, 0);
710         return ret;
711 }
712
713 static int generic_ide_resume(struct device *dev)
714 {
715         ide_drive_t *drive = dev->driver_data;
716         ide_hwif_t *hwif = HWIF(drive);
717         struct request rq;
718         struct request_pm_state rqpm;
719         ide_task_t args;
720         int err;
721
722         /* Call ACPI _STM only once */
723         if (!(drive->dn % 2)) {
724                 ide_acpi_set_state(hwif, 1);
725                 ide_acpi_push_timing(hwif);
726         }
727
728         ide_acpi_exec_tfs(drive);
729
730         memset(&rq, 0, sizeof(rq));
731         memset(&rqpm, 0, sizeof(rqpm));
732         memset(&args, 0, sizeof(args));
733         rq.cmd_type = REQ_TYPE_PM_RESUME;
734         rq.special = &args;
735         rq.data = &rqpm;
736         rqpm.pm_step = ide_pm_state_start_resume;
737         rqpm.pm_state = PM_EVENT_ON;
738
739         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
740
741         if (err == 0 && dev->driver) {
742                 ide_driver_t *drv = to_ide_driver(dev->driver);
743
744                 if (drv->resume)
745                         drv->resume(drive);
746         }
747
748         return err;
749 }
750
751 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
752                         unsigned int cmd, unsigned long arg)
753 {
754         unsigned long flags;
755         ide_driver_t *drv;
756         void __user *p = (void __user *)arg;
757         int err = 0, (*setfunc)(ide_drive_t *, int);
758         u8 *val;
759
760         switch (cmd) {
761         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
762         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
763         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
764         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
765         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
766         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
767         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
768         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
769         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
770         }
771
772         switch (cmd) {
773                 case HDIO_OBSOLETE_IDENTITY:
774                 case HDIO_GET_IDENTITY:
775                         if (bdev != bdev->bd_contains)
776                                 return -EINVAL;
777                         if (drive->id_read == 0)
778                                 return -ENOMSG;
779                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
780                                 return -EFAULT;
781                         return 0;
782
783                 case HDIO_GET_NICE:
784                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
785                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
786                                         drive->nice1 << IDE_NICE_1,
787                                         (long __user *) arg);
788 #ifdef CONFIG_IDE_TASK_IOCTL
789                 case HDIO_DRIVE_TASKFILE:
790                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
791                                 return -EACCES;
792                         switch(drive->media) {
793                                 case ide_disk:
794                                         return ide_taskfile_ioctl(drive, cmd, arg);
795                                 default:
796                                         return -ENOMSG;
797                         }
798 #endif /* CONFIG_IDE_TASK_IOCTL */
799
800                 case HDIO_DRIVE_CMD:
801                         if (!capable(CAP_SYS_RAWIO))
802                                 return -EACCES;
803                         return ide_cmd_ioctl(drive, cmd, arg);
804
805                 case HDIO_DRIVE_TASK:
806                         if (!capable(CAP_SYS_RAWIO))
807                                 return -EACCES;
808                         return ide_task_ioctl(drive, cmd, arg);
809                 case HDIO_SET_NICE:
810                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
811                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
812                                 return -EPERM;
813                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
814                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
815                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
816                                 drive->dsc_overlap = 0;
817                                 return -EPERM;
818                         }
819                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
820                         return 0;
821                 case HDIO_DRIVE_RESET:
822                         if (!capable(CAP_SYS_ADMIN))
823                                 return -EACCES;
824
825                         /*
826                          *      Abort the current command on the
827                          *      group if there is one, taking
828                          *      care not to allow anything else
829                          *      to be queued and to die on the
830                          *      spot if we miss one somehow
831                          */
832
833                         spin_lock_irqsave(&ide_lock, flags);
834
835                         if (HWGROUP(drive)->resetting) {
836                                 spin_unlock_irqrestore(&ide_lock, flags);
837                                 return -EBUSY;
838                         }
839
840                         ide_abort(drive, "drive reset");
841
842                         BUG_ON(HWGROUP(drive)->handler);
843
844                         /* Ensure nothing gets queued after we
845                            drop the lock. Reset will clear the busy */
846
847                         HWGROUP(drive)->busy = 1;
848                         spin_unlock_irqrestore(&ide_lock, flags);
849                         (void) ide_do_reset(drive);
850
851                         return 0;
852                 case HDIO_GET_BUSSTATE:
853                         if (!capable(CAP_SYS_ADMIN))
854                                 return -EACCES;
855                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
856                                 return -EFAULT;
857                         return 0;
858
859                 case HDIO_SET_BUSSTATE:
860                         if (!capable(CAP_SYS_ADMIN))
861                                 return -EACCES;
862                         return -EOPNOTSUPP;
863                 default:
864                         return -EINVAL;
865         }
866
867 read_val:
868         mutex_lock(&ide_setting_mtx);
869         spin_lock_irqsave(&ide_lock, flags);
870         err = *val;
871         spin_unlock_irqrestore(&ide_lock, flags);
872         mutex_unlock(&ide_setting_mtx);
873         return err >= 0 ? put_user(err, (long __user *)arg) : err;
874
875 set_val:
876         if (bdev != bdev->bd_contains)
877                 err = -EINVAL;
878         else {
879                 if (!capable(CAP_SYS_ADMIN))
880                         err = -EACCES;
881                 else {
882                         mutex_lock(&ide_setting_mtx);
883                         err = setfunc(drive, arg);
884                         mutex_unlock(&ide_setting_mtx);
885                 }
886         }
887         return err;
888 }
889
890 EXPORT_SYMBOL(generic_ide_ioctl);
891
892 /*
893  * stridx() returns the offset of c within s,
894  * or -1 if c is '\0' or not found within s.
895  */
896 static int __init stridx (const char *s, char c)
897 {
898         char *i = strchr(s, c);
899         return (i && c) ? i - s : -1;
900 }
901
902 /*
903  * match_parm() does parsing for ide_setup():
904  *
905  * 1. the first char of s must be '='.
906  * 2. if the remainder matches one of the supplied keywords,
907  *     the index (1 based) of the keyword is negated and returned.
908  * 3. if the remainder is a series of no more than max_vals numbers
909  *     separated by commas, the numbers are saved in vals[] and a
910  *     count of how many were saved is returned.  Base10 is assumed,
911  *     and base16 is allowed when prefixed with "0x".
912  * 4. otherwise, zero is returned.
913  */
914 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
915 {
916         static const char *decimal = "0123456789";
917         static const char *hex = "0123456789abcdef";
918         int i, n;
919
920         if (*s++ == '=') {
921                 /*
922                  * Try matching against the supplied keywords,
923                  * and return -(index+1) if we match one
924                  */
925                 if (keywords != NULL) {
926                         for (i = 0; *keywords != NULL; ++i) {
927                                 if (!strcmp(s, *keywords++))
928                                         return -(i+1);
929                         }
930                 }
931                 /*
932                  * Look for a series of no more than "max_vals"
933                  * numeric values separated by commas, in base10,
934                  * or base16 when prefixed with "0x".
935                  * Return a count of how many were found.
936                  */
937                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
938                         vals[n] = i;
939                         while ((i = stridx(decimal, *++s)) >= 0)
940                                 vals[n] = (vals[n] * 10) + i;
941                         if (*s == 'x' && !vals[n]) {
942                                 while ((i = stridx(hex, *++s)) >= 0)
943                                         vals[n] = (vals[n] * 0x10) + i;
944                         }
945                         if (++n == max_vals)
946                                 break;
947                         if (*s == ',' || *s == ';')
948                                 ++s;
949                 }
950                 if (!*s)
951                         return n;
952         }
953         return 0;       /* zero = nothing matched */
954 }
955
956 extern int probe_ali14xx;
957 extern int probe_umc8672;
958 extern int probe_dtc2278;
959 extern int probe_ht6560b;
960 extern int probe_qd65xx;
961 extern int cmd640_vlb;
962 extern int probe_4drives;
963
964 static int __initdata is_chipset_set;
965
966 /*
967  * ide_setup() gets called VERY EARLY during initialization,
968  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
969  *
970  * Remember to update Documentation/ide/ide.txt if you change something here.
971  */
972 static int __init ide_setup(char *s)
973 {
974         int i, vals[3];
975         ide_hwif_t *hwif;
976         ide_drive_t *drive;
977         unsigned int hw, unit;
978         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
979         const char max_hwif  = '0' + (MAX_HWIFS - 1);
980
981         
982         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
983                 return 0;                               /* driver and not us */
984
985         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
986                 return 0;
987
988         printk(KERN_INFO "ide_setup: %s", s);
989         init_ide_data ();
990
991 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
992         if (!strcmp(s, "ide=doubler")) {
993                 extern int ide_doubler;
994
995                 printk(" : Enabled support for IDE doublers\n");
996                 ide_doubler = 1;
997                 return 1;
998         }
999 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1000
1001         if (!strcmp(s, "ide=nodma")) {
1002                 printk(" : Prevented DMA\n");
1003                 noautodma = 1;
1004                 goto obsolete_option;
1005         }
1006
1007 #ifdef CONFIG_BLK_DEV_IDEACPI
1008         if (!strcmp(s, "ide=noacpi")) {
1009                 //printk(" : Disable IDE ACPI support.\n");
1010                 ide_noacpi = 1;
1011                 return 1;
1012         }
1013         if (!strcmp(s, "ide=acpigtf")) {
1014                 //printk(" : Enable IDE ACPI _GTF support.\n");
1015                 ide_noacpitfs = 0;
1016                 return 1;
1017         }
1018         if (!strcmp(s, "ide=acpionboot")) {
1019                 //printk(" : Call IDE ACPI methods on boot.\n");
1020                 ide_noacpionboot = 0;
1021                 return 1;
1022         }
1023 #endif /* CONFIG_BLK_DEV_IDEACPI */
1024
1025         /*
1026          * Look for drive options:  "hdx="
1027          */
1028         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1029                 const char *hd_words[] = {
1030                         "none", "noprobe", "nowerr", "cdrom", "nodma",
1031                         "autotune", "noautotune", "-8", "-9", "-10",
1032                         "noflush", "remap", "remap63", "scsi", NULL };
1033                 unit = s[2] - 'a';
1034                 hw   = unit / MAX_DRIVES;
1035                 unit = unit % MAX_DRIVES;
1036                 hwif = &ide_hwifs[hw];
1037                 drive = &hwif->drives[unit];
1038                 if (strncmp(s + 4, "ide-", 4) == 0) {
1039                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1040                         goto obsolete_option;
1041                 }
1042                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1043                         case -1: /* "none" */
1044                         case -2: /* "noprobe" */
1045                                 drive->noprobe = 1;
1046                                 goto done;
1047                         case -3: /* "nowerr" */
1048                                 drive->bad_wstat = BAD_R_STAT;
1049                                 hwif->noprobe = 0;
1050                                 goto done;
1051                         case -4: /* "cdrom" */
1052                                 drive->present = 1;
1053                                 drive->media = ide_cdrom;
1054                                 /* an ATAPI device ignores DRDY */
1055                                 drive->ready_stat = 0;
1056                                 hwif->noprobe = 0;
1057                                 goto done;
1058                         case -5: /* nodma */
1059                                 drive->nodma = 1;
1060                                 goto done;
1061                         case -6: /* "autotune" */
1062                                 drive->autotune = IDE_TUNE_AUTO;
1063                                 goto obsolete_option;
1064                         case -7: /* "noautotune" */
1065                                 drive->autotune = IDE_TUNE_NOAUTO;
1066                                 goto obsolete_option;
1067                         case -11: /* noflush */
1068                                 drive->noflush = 1;
1069                                 goto done;
1070                         case -12: /* "remap" */
1071                                 drive->remap_0_to_1 = 1;
1072                                 goto obsolete_option;
1073                         case -13: /* "remap63" */
1074                                 drive->sect0 = 63;
1075                                 goto obsolete_option;
1076                         case -14: /* "scsi" */
1077                                 drive->scsi = 1;
1078                                 goto obsolete_option;
1079                         case 3: /* cyl,head,sect */
1080                                 drive->media    = ide_disk;
1081                                 drive->ready_stat = READY_STAT;
1082                                 drive->cyl      = drive->bios_cyl  = vals[0];
1083                                 drive->head     = drive->bios_head = vals[1];
1084                                 drive->sect     = drive->bios_sect = vals[2];
1085                                 drive->present  = 1;
1086                                 drive->forced_geom = 1;
1087                                 hwif->noprobe = 0;
1088                                 goto done;
1089                         default:
1090                                 goto bad_option;
1091                 }
1092         }
1093
1094         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1095                 goto bad_option;
1096         /*
1097          * Look for bus speed option:  "idebus="
1098          */
1099         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1100                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1101                         goto bad_option;
1102                 if (vals[0] >= 20 && vals[0] <= 66) {
1103                         idebus_parameter = vals[0];
1104                 } else
1105                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1106                 goto done;
1107         }
1108         /*
1109          * Look for interface options:  "idex="
1110          */
1111         if (s[3] >= '0' && s[3] <= max_hwif) {
1112                 /*
1113                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1114                  * (-8, -9, -10) are reserved to ease the hardcoding.
1115                  */
1116                 static const char *ide_words[] = {
1117                         "minus1", "serialize", "minus3", "minus4",
1118                         "reset", "minus6", "ata66", "minus8", "minus9",
1119                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1120                         "dtc2278", "umc8672", "ali14xx", NULL };
1121
1122                 hw = s[3] - '0';
1123                 hwif = &ide_hwifs[hw];
1124                 i = match_parm(&s[4], ide_words, vals, 3);
1125
1126                 /*
1127                  * Cryptic check to ensure chipset not already set for hwif.
1128                  * Note: we can't depend on hwif->chipset here.
1129                  */
1130                 if (i >= -18 && i <= -11) {
1131                         /* chipset already specified */
1132                         if (is_chipset_set)
1133                                 goto bad_option;
1134                         /* these drivers are for "ide0=" only */
1135                         if (hw != 0)
1136                                 goto bad_hwif;
1137                         is_chipset_set = 1;
1138                         printk("\n");
1139                 }
1140
1141                 switch (i) {
1142 #ifdef CONFIG_BLK_DEV_ALI14XX
1143                         case -17: /* "ali14xx" */
1144                                 probe_ali14xx = 1;
1145                                 goto obsolete_option;
1146 #endif
1147 #ifdef CONFIG_BLK_DEV_UMC8672
1148                         case -16: /* "umc8672" */
1149                                 probe_umc8672 = 1;
1150                                 goto obsolete_option;
1151 #endif
1152 #ifdef CONFIG_BLK_DEV_DTC2278
1153                         case -15: /* "dtc2278" */
1154                                 probe_dtc2278 = 1;
1155                                 goto obsolete_option;
1156 #endif
1157 #ifdef CONFIG_BLK_DEV_CMD640
1158                         case -14: /* "cmd640_vlb" */
1159                                 cmd640_vlb = 1;
1160                                 goto obsolete_option;
1161 #endif
1162 #ifdef CONFIG_BLK_DEV_HT6560B
1163                         case -13: /* "ht6560b" */
1164                                 probe_ht6560b = 1;
1165                                 goto obsolete_option;
1166 #endif
1167 #ifdef CONFIG_BLK_DEV_QD65XX
1168                         case -12: /* "qd65xx" */
1169                                 probe_qd65xx = 1;
1170                                 goto obsolete_option;
1171 #endif
1172 #ifdef CONFIG_BLK_DEV_4DRIVES
1173                         case -11: /* "four" drives on one set of ports */
1174                                 probe_4drives = 1;
1175                                 goto obsolete_option;
1176 #endif
1177                         case -10: /* minus10 */
1178                         case -9: /* minus9 */
1179                         case -8: /* minus8 */
1180                         case -6:
1181                         case -4:
1182                         case -3:
1183                                 goto bad_option;
1184                         case -7: /* ata66 */
1185 #ifdef CONFIG_BLK_DEV_IDEPCI
1186                                 /*
1187                                  * Use ATA_CBL_PATA40_SHORT so drive side
1188                                  * cable detection is also overriden.
1189                                  */
1190                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1191                                 goto obsolete_option;
1192 #else
1193                                 goto bad_hwif;
1194 #endif
1195                         case -5: /* "reset" */
1196                                 hwif->reset = 1;
1197                                 goto obsolete_option;
1198                         case -2: /* "serialize" */
1199                                 hwif->mate = &ide_hwifs[hw^1];
1200                                 hwif->mate->mate = hwif;
1201                                 hwif->serialized = hwif->mate->serialized = 1;
1202                                 goto obsolete_option;
1203
1204                         case -1:
1205                         case 0:
1206                         case 1:
1207                         case 2:
1208                         case 3:
1209                                 goto bad_option;
1210                         default:
1211                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1212                                 return 1;
1213                 }
1214         }
1215 bad_option:
1216         printk(" -- BAD OPTION\n");
1217         return 1;
1218 obsolete_option:
1219         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1220         return 1;
1221 bad_hwif:
1222         printk("-- NOT SUPPORTED ON ide%d", hw);
1223 done:
1224         printk("\n");
1225         return 1;
1226 }
1227
1228 EXPORT_SYMBOL(ide_lock);
1229
1230 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1231 {
1232         return 1;
1233 }
1234
1235 static char *media_string(ide_drive_t *drive)
1236 {
1237         switch (drive->media) {
1238         case ide_disk:
1239                 return "disk";
1240         case ide_cdrom:
1241                 return "cdrom";
1242         case ide_tape:
1243                 return "tape";
1244         case ide_floppy:
1245                 return "floppy";
1246         case ide_optical:
1247                 return "optical";
1248         default:
1249                 return "UNKNOWN";
1250         }
1251 }
1252
1253 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1254 {
1255         ide_drive_t *drive = to_ide_device(dev);
1256         return sprintf(buf, "%s\n", media_string(drive));
1257 }
1258
1259 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1260 {
1261         ide_drive_t *drive = to_ide_device(dev);
1262         return sprintf(buf, "%s\n", drive->name);
1263 }
1264
1265 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1266 {
1267         ide_drive_t *drive = to_ide_device(dev);
1268         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1269 }
1270
1271 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1272                           char *buf)
1273 {
1274         ide_drive_t *drive = to_ide_device(dev);
1275         return sprintf(buf, "%s\n", drive->id->model);
1276 }
1277
1278 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1279                              char *buf)
1280 {
1281         ide_drive_t *drive = to_ide_device(dev);
1282         return sprintf(buf, "%s\n", drive->id->fw_rev);
1283 }
1284
1285 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1286                            char *buf)
1287 {
1288         ide_drive_t *drive = to_ide_device(dev);
1289         return sprintf(buf, "%s\n", drive->id->serial_no);
1290 }
1291
1292 static struct device_attribute ide_dev_attrs[] = {
1293         __ATTR_RO(media),
1294         __ATTR_RO(drivename),
1295         __ATTR_RO(modalias),
1296         __ATTR_RO(model),
1297         __ATTR_RO(firmware),
1298         __ATTR(serial, 0400, serial_show, NULL),
1299         __ATTR_NULL
1300 };
1301
1302 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1303 {
1304         ide_drive_t *drive = to_ide_device(dev);
1305
1306         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1307         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1308         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1309         return 0;
1310 }
1311
1312 static int generic_ide_probe(struct device *dev)
1313 {
1314         ide_drive_t *drive = to_ide_device(dev);
1315         ide_driver_t *drv = to_ide_driver(dev->driver);
1316
1317         return drv->probe ? drv->probe(drive) : -ENODEV;
1318 }
1319
1320 static int generic_ide_remove(struct device *dev)
1321 {
1322         ide_drive_t *drive = to_ide_device(dev);
1323         ide_driver_t *drv = to_ide_driver(dev->driver);
1324
1325         if (drv->remove)
1326                 drv->remove(drive);
1327
1328         return 0;
1329 }
1330
1331 static void generic_ide_shutdown(struct device *dev)
1332 {
1333         ide_drive_t *drive = to_ide_device(dev);
1334         ide_driver_t *drv = to_ide_driver(dev->driver);
1335
1336         if (dev->driver && drv->shutdown)
1337                 drv->shutdown(drive);
1338 }
1339
1340 struct bus_type ide_bus_type = {
1341         .name           = "ide",
1342         .match          = ide_bus_match,
1343         .uevent         = ide_uevent,
1344         .probe          = generic_ide_probe,
1345         .remove         = generic_ide_remove,
1346         .shutdown       = generic_ide_shutdown,
1347         .dev_attrs      = ide_dev_attrs,
1348         .suspend        = generic_ide_suspend,
1349         .resume         = generic_ide_resume,
1350 };
1351
1352 EXPORT_SYMBOL_GPL(ide_bus_type);
1353
1354 static void ide_port_class_release(struct device *portdev)
1355 {
1356         ide_hwif_t *hwif = dev_get_drvdata(portdev);
1357
1358         put_device(&hwif->gendev);
1359 }
1360
1361 /*
1362  * This is gets invoked once during initialization, to set *everything* up
1363  */
1364 static int __init ide_init(void)
1365 {
1366         int ret;
1367
1368         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1369         system_bus_speed = ide_system_bus_speed();
1370
1371         printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1372                          "for PIO modes%s\n", system_bus_speed,
1373                         idebus_parameter ? "" : "; override with idebus=xx");
1374
1375         ret = bus_register(&ide_bus_type);
1376         if (ret < 0) {
1377                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1378                 return ret;
1379         }
1380
1381         ide_port_class = class_create(THIS_MODULE, "ide_port");
1382         if (IS_ERR(ide_port_class)) {
1383                 ret = PTR_ERR(ide_port_class);
1384                 goto out_port_class;
1385         }
1386         ide_port_class->dev_release = ide_port_class_release;
1387
1388         init_ide_data();
1389
1390         proc_ide_create();
1391
1392         return 0;
1393
1394 out_port_class:
1395         bus_unregister(&ide_bus_type);
1396
1397         return ret;
1398 }
1399
1400 #ifdef MODULE
1401 static char *options = NULL;
1402 module_param(options, charp, 0);
1403 MODULE_LICENSE("GPL");
1404
1405 static void __init parse_options (char *line)
1406 {
1407         char *next = line;
1408
1409         if (line == NULL || !*line)
1410                 return;
1411         while ((line = next) != NULL) {
1412                 if ((next = strchr(line,' ')) != NULL)
1413                         *next++ = 0;
1414                 if (!ide_setup(line))
1415                         printk (KERN_INFO "Unknown option '%s'\n", line);
1416         }
1417 }
1418
1419 int __init init_module (void)
1420 {
1421         parse_options(options);
1422         return ide_init();
1423 }
1424
1425 void __exit cleanup_module (void)
1426 {
1427         int index;
1428
1429         for (index = 0; index < MAX_HWIFS; ++index)
1430                 ide_unregister(index);
1431
1432         proc_ide_destroy();
1433
1434         class_destroy(ide_port_class);
1435
1436         bus_unregister(&ide_bus_type);
1437 }
1438
1439 #else /* !MODULE */
1440
1441 __setup("", ide_setup);
1442
1443 module_init(ide_init);
1444
1445 #endif /* MODULE */