ide: remove CONFIG_IDE_ARCH_OBSOLETE_INIT
[linux-3.10.git] / 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 #ifndef CONFIG_IDE_ARCH_OBSOLETE_DEFAULTS
169 # define ide_default_io_base(index)     (0)
170 # define ide_init_default_irq(base)     (0)
171 #endif
172
173 /*
174  * init_ide_data() sets reasonable default values into all fields
175  * of all instances of the hwifs and drives, but only on the first call.
176  * Subsequent calls have no effect (they don't wipe out anything).
177  *
178  * This routine is normally called at driver initialization time,
179  * but may also be called MUCH earlier during kernel "command-line"
180  * parameter processing.  As such, we cannot depend on any other parts
181  * of the kernel (such as memory allocation) to be functioning yet.
182  *
183  * This is too bad, as otherwise we could dynamically allocate the
184  * ide_drive_t structs as needed, rather than always consuming memory
185  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
186  *
187  * FIXME: We should stuff the setup data into __init and copy the
188  * relevant hwifs/allocate them properly during boot.
189  */
190 #define MAGIC_COOKIE 0x12345678
191 static void __init init_ide_data (void)
192 {
193         unsigned int index;
194         static unsigned long magic_cookie = MAGIC_COOKIE;
195         hw_regs_t hw;
196
197         if (magic_cookie != MAGIC_COOKIE)
198                 return;         /* already initialized */
199         magic_cookie = 0;
200
201         /* Initialise all interface structures */
202         for (index = 0; index < MAX_HWIFS; ++index) {
203                 ide_hwif_t *hwif = &ide_hwifs[index];
204                 unsigned long io_addr = ide_default_io_base(index);
205                 unsigned long ctl_addr = ide_default_io_ctl(io_addr);
206
207                 ide_init_port_data(hwif, index);
208
209 #ifdef CONFIG_IDE_ARCH_OBSOLETE_DEFAULTS
210                 memset(&hw, 0, sizeof(hw));
211                 ide_std_init_ports(&hw, io_addr, ctl_addr);
212                 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
213                 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
214 #if !defined(CONFIG_PPC32) || defined(CONFIG_PPLUS) || !defined(CONFIG_PCI)
215                 hwif->irq =
216                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
217 #endif
218 #endif
219         }
220 }
221
222 /**
223  *      ide_system_bus_speed    -       guess bus speed
224  *
225  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
226  *      bus speed (in MHz). This is used for calculating interface PIO timings.
227  *      The default is 40 for known PCI systems, 50 otherwise.
228  *      The "idebus=xx" parameter can be used to override this value.
229  *      The actual value to be used is computed/displayed the first time
230  *      through. Drivers should only use this as a last resort.
231  *
232  *      Returns a guessed speed in MHz.
233  */
234
235 static int ide_system_bus_speed(void)
236 {
237 #ifdef CONFIG_PCI
238         static struct pci_device_id pci_default[] = {
239                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
240                 { }
241         };
242 #else
243 #define pci_default 0
244 #endif /* CONFIG_PCI */
245
246         /* user supplied value */
247         if (idebus_parameter)
248                 return idebus_parameter;
249
250         /* safe default value for PCI or VESA and PCI*/
251         return pci_dev_present(pci_default) ? 33 : 50;
252 }
253
254 ide_hwif_t * ide_find_port(unsigned long base)
255 {
256         ide_hwif_t *hwif;
257         int i;
258
259         for (i = 0; i < MAX_HWIFS; i++) {
260                 hwif = &ide_hwifs[i];
261                 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
262                         goto found;
263         }
264
265         for (i = 0; i < MAX_HWIFS; i++) {
266                 hwif = &ide_hwifs[i];
267                 if (hwif->chipset == ide_unknown)
268                         goto found;
269         }
270
271         hwif = NULL;
272 found:
273         return hwif;
274 }
275
276 EXPORT_SYMBOL_GPL(ide_find_port);
277
278 static struct resource* hwif_request_region(ide_hwif_t *hwif,
279                                             unsigned long addr, int num)
280 {
281         struct resource *res = request_region(addr, num, hwif->name);
282
283         if (!res)
284                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
285                                 hwif->name, addr, addr+num-1);
286         return res;
287 }
288
289 /**
290  *      ide_hwif_request_regions - request resources for IDE
291  *      @hwif: interface to use
292  *
293  *      Requests all the needed resources for an interface.
294  *      Right now core IDE code does this work which is deeply wrong.
295  *      MMIO leaves it to the controller driver,
296  *      PIO will migrate this way over time.
297  */
298
299 int ide_hwif_request_regions(ide_hwif_t *hwif)
300 {
301         unsigned long addr;
302         unsigned int i;
303
304         if (hwif->mmio)
305                 return 0;
306         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
307         if (addr && !hwif_request_region(hwif, addr, 1))
308                 goto control_region_busy;
309         hwif->straight8 = 0;
310         addr = hwif->io_ports[IDE_DATA_OFFSET];
311         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
312                 if (!hwif_request_region(hwif, addr, 8))
313                         goto data_region_busy;
314                 hwif->straight8 = 1;
315                 return 0;
316         }
317         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
318                 addr = hwif->io_ports[i];
319                 if (!hwif_request_region(hwif, addr, 1)) {
320                         while (--i)
321                                 release_region(addr, 1);
322                         goto data_region_busy;
323                 }
324         }
325         return 0;
326
327 data_region_busy:
328         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
329         if (addr)
330                 release_region(addr, 1);
331 control_region_busy:
332         /* If any errors are return, we drop the hwif interface. */
333         return -EBUSY;
334 }
335
336 /**
337  *      ide_hwif_release_regions - free IDE resources
338  *
339  *      Note that we only release the standard ports,
340  *      and do not even try to handle any extra ports
341  *      allocated for weird IDE interface chipsets.
342  *
343  *      Note also that we don't yet handle mmio resources here. More
344  *      importantly our caller should be doing this so we need to 
345  *      restructure this as a helper function for drivers.
346  */
347
348 void ide_hwif_release_regions(ide_hwif_t *hwif)
349 {
350         u32 i = 0;
351
352         if (hwif->mmio)
353                 return;
354         if (hwif->io_ports[IDE_CONTROL_OFFSET])
355                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
356         if (hwif->straight8) {
357                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
358                 return;
359         }
360         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
361                 if (hwif->io_ports[i])
362                         release_region(hwif->io_ports[i], 1);
363 }
364
365 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
366 {
367         ide_hwgroup_t *hwgroup = hwif->hwgroup;
368
369         spin_lock_irq(&ide_lock);
370         /*
371          * Remove us from the hwgroup, and free
372          * the hwgroup if we were the only member
373          */
374         if (hwif->next == hwif) {
375                 BUG_ON(hwgroup->hwif != hwif);
376                 kfree(hwgroup);
377         } else {
378                 /* There is another interface in hwgroup.
379                  * Unlink us, and set hwgroup->drive and ->hwif to
380                  * something sane.
381                  */
382                 ide_hwif_t *g = hwgroup->hwif;
383
384                 while (g->next != hwif)
385                         g = g->next;
386                 g->next = hwif->next;
387                 if (hwgroup->hwif == hwif) {
388                         /* Chose a random hwif for hwgroup->hwif.
389                          * It's guaranteed that there are no drives
390                          * left in the hwgroup.
391                          */
392                         BUG_ON(hwgroup->drive != NULL);
393                         hwgroup->hwif = g;
394                 }
395                 BUG_ON(hwgroup->hwif == hwif);
396         }
397         spin_unlock_irq(&ide_lock);
398 }
399
400 /* Called with ide_lock held. */
401 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
402 {
403         int i;
404
405         for (i = 0; i < MAX_DRIVES; i++) {
406                 ide_drive_t *drive = &hwif->drives[i];
407
408                 if (drive->present) {
409                         spin_unlock_irq(&ide_lock);
410                         device_unregister(&drive->gendev);
411                         wait_for_completion(&drive->gendev_rel_comp);
412                         spin_lock_irq(&ide_lock);
413                 }
414         }
415 }
416
417 void ide_port_unregister_devices(ide_hwif_t *hwif)
418 {
419         mutex_lock(&ide_cfg_mtx);
420         spin_lock_irq(&ide_lock);
421         __ide_port_unregister_devices(hwif);
422         hwif->present = 0;
423         ide_port_init_devices_data(hwif);
424         spin_unlock_irq(&ide_lock);
425         mutex_unlock(&ide_cfg_mtx);
426 }
427 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
428
429 /**
430  *      ide_unregister          -       free an IDE interface
431  *      @index: index of interface (will change soon to a pointer)
432  *
433  *      Perform the final unregister of an IDE interface. At the moment
434  *      we don't refcount interfaces so this will also get split up.
435  *
436  *      Locking:
437  *      The caller must not hold the IDE locks
438  *      The drive present/vanishing is not yet properly locked
439  *      Take care with the callbacks. These have been split to avoid
440  *      deadlocking the IDE layer. The shutdown callback is called
441  *      before we take the lock and free resources. It is up to the
442  *      caller to be sure there is no pending I/O here, and that
443  *      the interface will not be reopened (present/vanishing locking
444  *      isn't yet done BTW). After we commit to the final kill we
445  *      call the cleanup callback with the ide locks held.
446  *
447  *      Unregister restores the hwif structures to the default state.
448  *      This is raving bonkers.
449  */
450
451 void ide_unregister(unsigned int index)
452 {
453         ide_hwif_t *hwif, *g;
454         ide_hwgroup_t *hwgroup;
455         int irq_count = 0;
456
457         BUG_ON(index >= MAX_HWIFS);
458
459         BUG_ON(in_interrupt());
460         BUG_ON(irqs_disabled());
461         mutex_lock(&ide_cfg_mtx);
462         spin_lock_irq(&ide_lock);
463         hwif = &ide_hwifs[index];
464         if (!hwif->present)
465                 goto abort;
466         __ide_port_unregister_devices(hwif);
467         hwif->present = 0;
468
469         spin_unlock_irq(&ide_lock);
470
471         ide_proc_unregister_port(hwif);
472
473         hwgroup = hwif->hwgroup;
474         /*
475          * free the irq if we were the only hwif using it
476          */
477         g = hwgroup->hwif;
478         do {
479                 if (g->irq == hwif->irq)
480                         ++irq_count;
481                 g = g->next;
482         } while (g != hwgroup->hwif);
483         if (irq_count == 1)
484                 free_irq(hwif->irq, hwgroup);
485
486         ide_remove_port_from_hwgroup(hwif);
487
488         device_unregister(hwif->portdev);
489         device_unregister(&hwif->gendev);
490         wait_for_completion(&hwif->gendev_rel_comp);
491
492         /*
493          * Remove us from the kernel's knowledge
494          */
495         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
496         kfree(hwif->sg_table);
497         unregister_blkdev(hwif->major, hwif->name);
498         spin_lock_irq(&ide_lock);
499
500         if (hwif->dma_base)
501                 (void)ide_release_dma(hwif);
502
503         ide_hwif_release_regions(hwif);
504
505         /* restore hwif data to pristine status */
506         ide_init_port_data(hwif, index);
507
508 abort:
509         spin_unlock_irq(&ide_lock);
510         mutex_unlock(&ide_cfg_mtx);
511 }
512
513 EXPORT_SYMBOL(ide_unregister);
514
515 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
516 {
517         memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
518         hwif->irq = hw->irq;
519         hwif->noprobe = 0;
520         hwif->chipset = hw->chipset;
521         hwif->gendev.parent = hw->dev;
522         hwif->ack_intr = hw->ack_intr;
523 }
524 EXPORT_SYMBOL_GPL(ide_init_port_hw);
525
526 /*
527  *      Locks for IDE setting functionality
528  */
529
530 DEFINE_MUTEX(ide_setting_mtx);
531
532 EXPORT_SYMBOL_GPL(ide_setting_mtx);
533
534 /**
535  *      ide_spin_wait_hwgroup   -       wait for group
536  *      @drive: drive in the group
537  *
538  *      Wait for an IDE device group to go non busy and then return
539  *      holding the ide_lock which guards the hwgroup->busy status
540  *      and right to use it.
541  */
542
543 int ide_spin_wait_hwgroup (ide_drive_t *drive)
544 {
545         ide_hwgroup_t *hwgroup = HWGROUP(drive);
546         unsigned long timeout = jiffies + (3 * HZ);
547
548         spin_lock_irq(&ide_lock);
549
550         while (hwgroup->busy) {
551                 unsigned long lflags;
552                 spin_unlock_irq(&ide_lock);
553                 local_irq_set(lflags);
554                 if (time_after(jiffies, timeout)) {
555                         local_irq_restore(lflags);
556                         printk(KERN_ERR "%s: channel busy\n", drive->name);
557                         return -EBUSY;
558                 }
559                 local_irq_restore(lflags);
560                 spin_lock_irq(&ide_lock);
561         }
562         return 0;
563 }
564
565 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
566
567 int set_io_32bit(ide_drive_t *drive, int arg)
568 {
569         if (drive->no_io_32bit)
570                 return -EPERM;
571
572         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
573                 return -EINVAL;
574
575         if (ide_spin_wait_hwgroup(drive))
576                 return -EBUSY;
577
578         drive->io_32bit = arg;
579
580         spin_unlock_irq(&ide_lock);
581
582         return 0;
583 }
584
585 static int set_ksettings(ide_drive_t *drive, int arg)
586 {
587         if (arg < 0 || arg > 1)
588                 return -EINVAL;
589
590         if (ide_spin_wait_hwgroup(drive))
591                 return -EBUSY;
592         drive->keep_settings = arg;
593         spin_unlock_irq(&ide_lock);
594
595         return 0;
596 }
597
598 int set_using_dma(ide_drive_t *drive, int arg)
599 {
600 #ifdef CONFIG_BLK_DEV_IDEDMA
601         ide_hwif_t *hwif = drive->hwif;
602         int err = -EPERM;
603
604         if (arg < 0 || arg > 1)
605                 return -EINVAL;
606
607         if (!drive->id || !(drive->id->capability & 1))
608                 goto out;
609
610         if (hwif->dma_host_set == NULL)
611                 goto out;
612
613         err = -EBUSY;
614         if (ide_spin_wait_hwgroup(drive))
615                 goto out;
616         /*
617          * set ->busy flag, unlock and let it ride
618          */
619         hwif->hwgroup->busy = 1;
620         spin_unlock_irq(&ide_lock);
621
622         err = 0;
623
624         if (arg) {
625                 if (ide_set_dma(drive))
626                         err = -EIO;
627         } else
628                 ide_dma_off(drive);
629
630         /*
631          * lock, clear ->busy flag and unlock before leaving
632          */
633         spin_lock_irq(&ide_lock);
634         hwif->hwgroup->busy = 0;
635         spin_unlock_irq(&ide_lock);
636 out:
637         return err;
638 #else
639         if (arg < 0 || arg > 1)
640                 return -EINVAL;
641
642         return -EPERM;
643 #endif
644 }
645
646 int set_pio_mode(ide_drive_t *drive, int arg)
647 {
648         struct request rq;
649
650         if (arg < 0 || arg > 255)
651                 return -EINVAL;
652
653         if (drive->hwif->set_pio_mode == NULL)
654                 return -ENOSYS;
655
656         if (drive->special.b.set_tune)
657                 return -EBUSY;
658
659         ide_init_drive_cmd(&rq);
660         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
661
662         drive->tune_req = (u8) arg;
663         drive->special.b.set_tune = 1;
664         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
665         return 0;
666 }
667
668 static int set_unmaskirq(ide_drive_t *drive, int arg)
669 {
670         if (drive->no_unmask)
671                 return -EPERM;
672
673         if (arg < 0 || arg > 1)
674                 return -EINVAL;
675
676         if (ide_spin_wait_hwgroup(drive))
677                 return -EBUSY;
678         drive->unmask = arg;
679         spin_unlock_irq(&ide_lock);
680
681         return 0;
682 }
683
684 /**
685  *      system_bus_clock        -       clock guess
686  *
687  *      External version of the bus clock guess used by very old IDE drivers
688  *      for things like VLB timings. Should not be used.
689  */
690
691 int system_bus_clock (void)
692 {
693         return system_bus_speed;
694 }
695
696 EXPORT_SYMBOL(system_bus_clock);
697
698 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
699 {
700         ide_drive_t *drive = dev->driver_data;
701         ide_hwif_t *hwif = HWIF(drive);
702         struct request rq;
703         struct request_pm_state rqpm;
704         ide_task_t args;
705         int ret;
706
707         /* Call ACPI _GTM only once */
708         if (!(drive->dn % 2))
709                 ide_acpi_get_timing(hwif);
710
711         memset(&rq, 0, sizeof(rq));
712         memset(&rqpm, 0, sizeof(rqpm));
713         memset(&args, 0, sizeof(args));
714         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
715         rq.special = &args;
716         rq.data = &rqpm;
717         rqpm.pm_step = ide_pm_state_start_suspend;
718         if (mesg.event == PM_EVENT_PRETHAW)
719                 mesg.event = PM_EVENT_FREEZE;
720         rqpm.pm_state = mesg.event;
721
722         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
723         /* only call ACPI _PS3 after both drivers are suspended */
724         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
725                  && hwif->drives[1].present)
726                  || !hwif->drives[0].present
727                  || !hwif->drives[1].present))
728                 ide_acpi_set_state(hwif, 0);
729         return ret;
730 }
731
732 static int generic_ide_resume(struct device *dev)
733 {
734         ide_drive_t *drive = dev->driver_data;
735         ide_hwif_t *hwif = HWIF(drive);
736         struct request rq;
737         struct request_pm_state rqpm;
738         ide_task_t args;
739         int err;
740
741         /* Call ACPI _STM only once */
742         if (!(drive->dn % 2)) {
743                 ide_acpi_set_state(hwif, 1);
744                 ide_acpi_push_timing(hwif);
745         }
746
747         ide_acpi_exec_tfs(drive);
748
749         memset(&rq, 0, sizeof(rq));
750         memset(&rqpm, 0, sizeof(rqpm));
751         memset(&args, 0, sizeof(args));
752         rq.cmd_type = REQ_TYPE_PM_RESUME;
753         rq.special = &args;
754         rq.data = &rqpm;
755         rqpm.pm_step = ide_pm_state_start_resume;
756         rqpm.pm_state = PM_EVENT_ON;
757
758         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
759
760         if (err == 0 && dev->driver) {
761                 ide_driver_t *drv = to_ide_driver(dev->driver);
762
763                 if (drv->resume)
764                         drv->resume(drive);
765         }
766
767         return err;
768 }
769
770 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
771                         unsigned int cmd, unsigned long arg)
772 {
773         unsigned long flags;
774         ide_driver_t *drv;
775         void __user *p = (void __user *)arg;
776         int err = 0, (*setfunc)(ide_drive_t *, int);
777         u8 *val;
778
779         switch (cmd) {
780         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
781         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
782         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
783         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
784         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
785         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
786         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
787         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
788         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
789         }
790
791         switch (cmd) {
792                 case HDIO_OBSOLETE_IDENTITY:
793                 case HDIO_GET_IDENTITY:
794                         if (bdev != bdev->bd_contains)
795                                 return -EINVAL;
796                         if (drive->id_read == 0)
797                                 return -ENOMSG;
798                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
799                                 return -EFAULT;
800                         return 0;
801
802                 case HDIO_GET_NICE:
803                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
804                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
805                                         drive->nice1 << IDE_NICE_1,
806                                         (long __user *) arg);
807 #ifdef CONFIG_IDE_TASK_IOCTL
808                 case HDIO_DRIVE_TASKFILE:
809                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
810                                 return -EACCES;
811                         switch(drive->media) {
812                                 case ide_disk:
813                                         return ide_taskfile_ioctl(drive, cmd, arg);
814                                 default:
815                                         return -ENOMSG;
816                         }
817 #endif /* CONFIG_IDE_TASK_IOCTL */
818
819                 case HDIO_DRIVE_CMD:
820                         if (!capable(CAP_SYS_RAWIO))
821                                 return -EACCES;
822                         return ide_cmd_ioctl(drive, cmd, arg);
823
824                 case HDIO_DRIVE_TASK:
825                         if (!capable(CAP_SYS_RAWIO))
826                                 return -EACCES;
827                         return ide_task_ioctl(drive, cmd, arg);
828                 case HDIO_SET_NICE:
829                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
830                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
831                                 return -EPERM;
832                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
833                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
834                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
835                                 drive->dsc_overlap = 0;
836                                 return -EPERM;
837                         }
838                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
839                         return 0;
840                 case HDIO_DRIVE_RESET:
841                         if (!capable(CAP_SYS_ADMIN))
842                                 return -EACCES;
843
844                         /*
845                          *      Abort the current command on the
846                          *      group if there is one, taking
847                          *      care not to allow anything else
848                          *      to be queued and to die on the
849                          *      spot if we miss one somehow
850                          */
851
852                         spin_lock_irqsave(&ide_lock, flags);
853
854                         if (HWGROUP(drive)->resetting) {
855                                 spin_unlock_irqrestore(&ide_lock, flags);
856                                 return -EBUSY;
857                         }
858
859                         ide_abort(drive, "drive reset");
860
861                         BUG_ON(HWGROUP(drive)->handler);
862
863                         /* Ensure nothing gets queued after we
864                            drop the lock. Reset will clear the busy */
865
866                         HWGROUP(drive)->busy = 1;
867                         spin_unlock_irqrestore(&ide_lock, flags);
868                         (void) ide_do_reset(drive);
869
870                         return 0;
871                 case HDIO_GET_BUSSTATE:
872                         if (!capable(CAP_SYS_ADMIN))
873                                 return -EACCES;
874                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
875                                 return -EFAULT;
876                         return 0;
877
878                 case HDIO_SET_BUSSTATE:
879                         if (!capable(CAP_SYS_ADMIN))
880                                 return -EACCES;
881                         return -EOPNOTSUPP;
882                 default:
883                         return -EINVAL;
884         }
885
886 read_val:
887         mutex_lock(&ide_setting_mtx);
888         spin_lock_irqsave(&ide_lock, flags);
889         err = *val;
890         spin_unlock_irqrestore(&ide_lock, flags);
891         mutex_unlock(&ide_setting_mtx);
892         return err >= 0 ? put_user(err, (long __user *)arg) : err;
893
894 set_val:
895         if (bdev != bdev->bd_contains)
896                 err = -EINVAL;
897         else {
898                 if (!capable(CAP_SYS_ADMIN))
899                         err = -EACCES;
900                 else {
901                         mutex_lock(&ide_setting_mtx);
902                         err = setfunc(drive, arg);
903                         mutex_unlock(&ide_setting_mtx);
904                 }
905         }
906         return err;
907 }
908
909 EXPORT_SYMBOL(generic_ide_ioctl);
910
911 /*
912  * stridx() returns the offset of c within s,
913  * or -1 if c is '\0' or not found within s.
914  */
915 static int __init stridx (const char *s, char c)
916 {
917         char *i = strchr(s, c);
918         return (i && c) ? i - s : -1;
919 }
920
921 /*
922  * match_parm() does parsing for ide_setup():
923  *
924  * 1. the first char of s must be '='.
925  * 2. if the remainder matches one of the supplied keywords,
926  *     the index (1 based) of the keyword is negated and returned.
927  * 3. if the remainder is a series of no more than max_vals numbers
928  *     separated by commas, the numbers are saved in vals[] and a
929  *     count of how many were saved is returned.  Base10 is assumed,
930  *     and base16 is allowed when prefixed with "0x".
931  * 4. otherwise, zero is returned.
932  */
933 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
934 {
935         static const char *decimal = "0123456789";
936         static const char *hex = "0123456789abcdef";
937         int i, n;
938
939         if (*s++ == '=') {
940                 /*
941                  * Try matching against the supplied keywords,
942                  * and return -(index+1) if we match one
943                  */
944                 if (keywords != NULL) {
945                         for (i = 0; *keywords != NULL; ++i) {
946                                 if (!strcmp(s, *keywords++))
947                                         return -(i+1);
948                         }
949                 }
950                 /*
951                  * Look for a series of no more than "max_vals"
952                  * numeric values separated by commas, in base10,
953                  * or base16 when prefixed with "0x".
954                  * Return a count of how many were found.
955                  */
956                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
957                         vals[n] = i;
958                         while ((i = stridx(decimal, *++s)) >= 0)
959                                 vals[n] = (vals[n] * 10) + i;
960                         if (*s == 'x' && !vals[n]) {
961                                 while ((i = stridx(hex, *++s)) >= 0)
962                                         vals[n] = (vals[n] * 0x10) + i;
963                         }
964                         if (++n == max_vals)
965                                 break;
966                         if (*s == ',' || *s == ';')
967                                 ++s;
968                 }
969                 if (!*s)
970                         return n;
971         }
972         return 0;       /* zero = nothing matched */
973 }
974
975 extern int probe_ali14xx;
976 extern int probe_umc8672;
977 extern int probe_dtc2278;
978 extern int probe_ht6560b;
979 extern int probe_qd65xx;
980 extern int cmd640_vlb;
981
982 static int __initdata is_chipset_set;
983
984 /*
985  * ide_setup() gets called VERY EARLY during initialization,
986  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
987  *
988  * Remember to update Documentation/ide/ide.txt if you change something here.
989  */
990 static int __init ide_setup(char *s)
991 {
992         int i, vals[3];
993         ide_hwif_t *hwif;
994         ide_drive_t *drive;
995         unsigned int hw, unit;
996         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
997         const char max_hwif  = '0' + (MAX_HWIFS - 1);
998
999         
1000         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1001                 return 0;                               /* driver and not us */
1002
1003         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1004                 return 0;
1005
1006         printk(KERN_INFO "ide_setup: %s", s);
1007         init_ide_data ();
1008
1009 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1010         if (!strcmp(s, "ide=doubler")) {
1011                 extern int ide_doubler;
1012
1013                 printk(" : Enabled support for IDE doublers\n");
1014                 ide_doubler = 1;
1015                 return 1;
1016         }
1017 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1018
1019         if (!strcmp(s, "ide=nodma")) {
1020                 printk(" : Prevented DMA\n");
1021                 noautodma = 1;
1022                 goto obsolete_option;
1023         }
1024
1025 #ifdef CONFIG_BLK_DEV_IDEACPI
1026         if (!strcmp(s, "ide=noacpi")) {
1027                 //printk(" : Disable IDE ACPI support.\n");
1028                 ide_noacpi = 1;
1029                 return 1;
1030         }
1031         if (!strcmp(s, "ide=acpigtf")) {
1032                 //printk(" : Enable IDE ACPI _GTF support.\n");
1033                 ide_noacpitfs = 0;
1034                 return 1;
1035         }
1036         if (!strcmp(s, "ide=acpionboot")) {
1037                 //printk(" : Call IDE ACPI methods on boot.\n");
1038                 ide_noacpionboot = 0;
1039                 return 1;
1040         }
1041 #endif /* CONFIG_BLK_DEV_IDEACPI */
1042
1043         /*
1044          * Look for drive options:  "hdx="
1045          */
1046         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1047                 const char *hd_words[] = {
1048                         "none", "noprobe", "nowerr", "cdrom", "nodma",
1049                         "autotune", "noautotune", "-8", "-9", "-10",
1050                         "noflush", "remap", "remap63", "scsi", NULL };
1051                 unit = s[2] - 'a';
1052                 hw   = unit / MAX_DRIVES;
1053                 unit = unit % MAX_DRIVES;
1054                 hwif = &ide_hwifs[hw];
1055                 drive = &hwif->drives[unit];
1056                 if (strncmp(s + 4, "ide-", 4) == 0) {
1057                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1058                         goto obsolete_option;
1059                 }
1060                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1061                         case -1: /* "none" */
1062                         case -2: /* "noprobe" */
1063                                 drive->noprobe = 1;
1064                                 goto done;
1065                         case -3: /* "nowerr" */
1066                                 drive->bad_wstat = BAD_R_STAT;
1067                                 hwif->noprobe = 0;
1068                                 goto done;
1069                         case -4: /* "cdrom" */
1070                                 drive->present = 1;
1071                                 drive->media = ide_cdrom;
1072                                 /* an ATAPI device ignores DRDY */
1073                                 drive->ready_stat = 0;
1074                                 hwif->noprobe = 0;
1075                                 goto done;
1076                         case -5: /* nodma */
1077                                 drive->nodma = 1;
1078                                 goto done;
1079                         case -6: /* "autotune" */
1080                                 drive->autotune = IDE_TUNE_AUTO;
1081                                 goto obsolete_option;
1082                         case -7: /* "noautotune" */
1083                                 drive->autotune = IDE_TUNE_NOAUTO;
1084                                 goto obsolete_option;
1085                         case -11: /* noflush */
1086                                 drive->noflush = 1;
1087                                 goto done;
1088                         case -12: /* "remap" */
1089                                 drive->remap_0_to_1 = 1;
1090                                 goto obsolete_option;
1091                         case -13: /* "remap63" */
1092                                 drive->sect0 = 63;
1093                                 goto obsolete_option;
1094                         case -14: /* "scsi" */
1095                                 drive->scsi = 1;
1096                                 goto obsolete_option;
1097                         case 3: /* cyl,head,sect */
1098                                 drive->media    = ide_disk;
1099                                 drive->ready_stat = READY_STAT;
1100                                 drive->cyl      = drive->bios_cyl  = vals[0];
1101                                 drive->head     = drive->bios_head = vals[1];
1102                                 drive->sect     = drive->bios_sect = vals[2];
1103                                 drive->present  = 1;
1104                                 drive->forced_geom = 1;
1105                                 hwif->noprobe = 0;
1106                                 goto done;
1107                         default:
1108                                 goto bad_option;
1109                 }
1110         }
1111
1112         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1113                 goto bad_option;
1114         /*
1115          * Look for bus speed option:  "idebus="
1116          */
1117         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1118                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1119                         goto bad_option;
1120                 if (vals[0] >= 20 && vals[0] <= 66) {
1121                         idebus_parameter = vals[0];
1122                 } else
1123                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1124                 goto done;
1125         }
1126         /*
1127          * Look for interface options:  "idex="
1128          */
1129         if (s[3] >= '0' && s[3] <= max_hwif) {
1130                 /*
1131                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1132                  * (-8, -9, -10) are reserved to ease the hardcoding.
1133                  */
1134                 static const char *ide_words[] = {
1135                         "noprobe", "serialize", "minus3", "minus4",
1136                         "reset", "minus6", "ata66", "minus8", "minus9",
1137                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1138                         "dtc2278", "umc8672", "ali14xx", NULL };
1139
1140                 hw = s[3] - '0';
1141                 hwif = &ide_hwifs[hw];
1142                 i = match_parm(&s[4], ide_words, vals, 3);
1143
1144                 /*
1145                  * Cryptic check to ensure chipset not already set for hwif.
1146                  * Note: we can't depend on hwif->chipset here.
1147                  */
1148                 if (i >= -18 && i <= -11) {
1149                         /* chipset already specified */
1150                         if (is_chipset_set)
1151                                 goto bad_option;
1152                         /* these drivers are for "ide0=" only */
1153                         if (hw != 0)
1154                                 goto bad_hwif;
1155                         is_chipset_set = 1;
1156                         printk("\n");
1157                 }
1158
1159                 switch (i) {
1160 #ifdef CONFIG_BLK_DEV_ALI14XX
1161                         case -17: /* "ali14xx" */
1162                                 probe_ali14xx = 1;
1163                                 goto obsolete_option;
1164 #endif
1165 #ifdef CONFIG_BLK_DEV_UMC8672
1166                         case -16: /* "umc8672" */
1167                                 probe_umc8672 = 1;
1168                                 goto obsolete_option;
1169 #endif
1170 #ifdef CONFIG_BLK_DEV_DTC2278
1171                         case -15: /* "dtc2278" */
1172                                 probe_dtc2278 = 1;
1173                                 goto obsolete_option;
1174 #endif
1175 #ifdef CONFIG_BLK_DEV_CMD640
1176                         case -14: /* "cmd640_vlb" */
1177                                 cmd640_vlb = 1;
1178                                 goto obsolete_option;
1179 #endif
1180 #ifdef CONFIG_BLK_DEV_HT6560B
1181                         case -13: /* "ht6560b" */
1182                                 probe_ht6560b = 1;
1183                                 goto obsolete_option;
1184 #endif
1185 #ifdef CONFIG_BLK_DEV_QD65XX
1186                         case -12: /* "qd65xx" */
1187                                 probe_qd65xx = 1;
1188                                 goto obsolete_option;
1189 #endif
1190 #ifdef CONFIG_BLK_DEV_4DRIVES
1191                         case -11: /* "four" drives on one set of ports */
1192                         {
1193                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1194                                 mate->drives[0].select.all ^= 0x20;
1195                                 mate->drives[1].select.all ^= 0x20;
1196                                 hwif->chipset = mate->chipset = ide_4drives;
1197                                 mate->irq = hwif->irq;
1198                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1199                                 hwif->mate = mate;
1200                                 mate->mate = hwif;
1201                                 hwif->serialized = mate->serialized = 1;
1202                                 goto obsolete_option;
1203                         }
1204 #endif /* CONFIG_BLK_DEV_4DRIVES */
1205                         case -10: /* minus10 */
1206                         case -9: /* minus9 */
1207                         case -8: /* minus8 */
1208                         case -6:
1209                         case -4:
1210                         case -3:
1211                                 goto bad_option;
1212                         case -7: /* ata66 */
1213 #ifdef CONFIG_BLK_DEV_IDEPCI
1214                                 /*
1215                                  * Use ATA_CBL_PATA40_SHORT so drive side
1216                                  * cable detection is also overriden.
1217                                  */
1218                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1219                                 goto obsolete_option;
1220 #else
1221                                 goto bad_hwif;
1222 #endif
1223                         case -5: /* "reset" */
1224                                 hwif->reset = 1;
1225                                 goto obsolete_option;
1226                         case -2: /* "serialize" */
1227                                 hwif->mate = &ide_hwifs[hw^1];
1228                                 hwif->mate->mate = hwif;
1229                                 hwif->serialized = hwif->mate->serialized = 1;
1230                                 goto obsolete_option;
1231
1232                         case -1: /* "noprobe" */
1233                                 hwif->noprobe = 1;
1234                                 goto obsolete_option;
1235                         case 0:
1236                         case 1:
1237                         case 2:
1238                         case 3:
1239                                 goto bad_option;
1240                         default:
1241                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1242                                 return 1;
1243                 }
1244         }
1245 bad_option:
1246         printk(" -- BAD OPTION\n");
1247         return 1;
1248 obsolete_option:
1249         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1250         return 1;
1251 bad_hwif:
1252         printk("-- NOT SUPPORTED ON ide%d", hw);
1253 done:
1254         printk("\n");
1255         return 1;
1256 }
1257
1258 EXPORT_SYMBOL(ide_lock);
1259
1260 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1261 {
1262         return 1;
1263 }
1264
1265 static char *media_string(ide_drive_t *drive)
1266 {
1267         switch (drive->media) {
1268         case ide_disk:
1269                 return "disk";
1270         case ide_cdrom:
1271                 return "cdrom";
1272         case ide_tape:
1273                 return "tape";
1274         case ide_floppy:
1275                 return "floppy";
1276         case ide_optical:
1277                 return "optical";
1278         default:
1279                 return "UNKNOWN";
1280         }
1281 }
1282
1283 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1284 {
1285         ide_drive_t *drive = to_ide_device(dev);
1286         return sprintf(buf, "%s\n", media_string(drive));
1287 }
1288
1289 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1290 {
1291         ide_drive_t *drive = to_ide_device(dev);
1292         return sprintf(buf, "%s\n", drive->name);
1293 }
1294
1295 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1296 {
1297         ide_drive_t *drive = to_ide_device(dev);
1298         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1299 }
1300
1301 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1302                           char *buf)
1303 {
1304         ide_drive_t *drive = to_ide_device(dev);
1305         return sprintf(buf, "%s\n", drive->id->model);
1306 }
1307
1308 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1309                              char *buf)
1310 {
1311         ide_drive_t *drive = to_ide_device(dev);
1312         return sprintf(buf, "%s\n", drive->id->fw_rev);
1313 }
1314
1315 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1316                            char *buf)
1317 {
1318         ide_drive_t *drive = to_ide_device(dev);
1319         return sprintf(buf, "%s\n", drive->id->serial_no);
1320 }
1321
1322 static struct device_attribute ide_dev_attrs[] = {
1323         __ATTR_RO(media),
1324         __ATTR_RO(drivename),
1325         __ATTR_RO(modalias),
1326         __ATTR_RO(model),
1327         __ATTR_RO(firmware),
1328         __ATTR(serial, 0400, serial_show, NULL),
1329         __ATTR_NULL
1330 };
1331
1332 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1333 {
1334         ide_drive_t *drive = to_ide_device(dev);
1335
1336         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1337         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1338         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1339         return 0;
1340 }
1341
1342 static int generic_ide_probe(struct device *dev)
1343 {
1344         ide_drive_t *drive = to_ide_device(dev);
1345         ide_driver_t *drv = to_ide_driver(dev->driver);
1346
1347         return drv->probe ? drv->probe(drive) : -ENODEV;
1348 }
1349
1350 static int generic_ide_remove(struct device *dev)
1351 {
1352         ide_drive_t *drive = to_ide_device(dev);
1353         ide_driver_t *drv = to_ide_driver(dev->driver);
1354
1355         if (drv->remove)
1356                 drv->remove(drive);
1357
1358         return 0;
1359 }
1360
1361 static void generic_ide_shutdown(struct device *dev)
1362 {
1363         ide_drive_t *drive = to_ide_device(dev);
1364         ide_driver_t *drv = to_ide_driver(dev->driver);
1365
1366         if (dev->driver && drv->shutdown)
1367                 drv->shutdown(drive);
1368 }
1369
1370 struct bus_type ide_bus_type = {
1371         .name           = "ide",
1372         .match          = ide_bus_match,
1373         .uevent         = ide_uevent,
1374         .probe          = generic_ide_probe,
1375         .remove         = generic_ide_remove,
1376         .shutdown       = generic_ide_shutdown,
1377         .dev_attrs      = ide_dev_attrs,
1378         .suspend        = generic_ide_suspend,
1379         .resume         = generic_ide_resume,
1380 };
1381
1382 EXPORT_SYMBOL_GPL(ide_bus_type);
1383
1384 static void ide_port_class_release(struct device *portdev)
1385 {
1386         ide_hwif_t *hwif = dev_get_drvdata(portdev);
1387
1388         put_device(&hwif->gendev);
1389 }
1390
1391 /*
1392  * This is gets invoked once during initialization, to set *everything* up
1393  */
1394 static int __init ide_init(void)
1395 {
1396         int ret;
1397
1398         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1399         system_bus_speed = ide_system_bus_speed();
1400
1401         printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1402                          "for PIO modes%s\n", system_bus_speed,
1403                         idebus_parameter ? "" : "; override with idebus=xx");
1404
1405         ret = bus_register(&ide_bus_type);
1406         if (ret < 0) {
1407                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1408                 return ret;
1409         }
1410
1411         ide_port_class = class_create(THIS_MODULE, "ide_port");
1412         if (IS_ERR(ide_port_class)) {
1413                 ret = PTR_ERR(ide_port_class);
1414                 goto out_port_class;
1415         }
1416         ide_port_class->dev_release = ide_port_class_release;
1417
1418         init_ide_data();
1419
1420         proc_ide_create();
1421
1422         return 0;
1423
1424 out_port_class:
1425         bus_unregister(&ide_bus_type);
1426
1427         return ret;
1428 }
1429
1430 #ifdef MODULE
1431 static char *options = NULL;
1432 module_param(options, charp, 0);
1433 MODULE_LICENSE("GPL");
1434
1435 static void __init parse_options (char *line)
1436 {
1437         char *next = line;
1438
1439         if (line == NULL || !*line)
1440                 return;
1441         while ((line = next) != NULL) {
1442                 if ((next = strchr(line,' ')) != NULL)
1443                         *next++ = 0;
1444                 if (!ide_setup(line))
1445                         printk (KERN_INFO "Unknown option '%s'\n", line);
1446         }
1447 }
1448
1449 int __init init_module (void)
1450 {
1451         parse_options(options);
1452         return ide_init();
1453 }
1454
1455 void __exit cleanup_module (void)
1456 {
1457         int index;
1458
1459         for (index = 0; index < MAX_HWIFS; ++index)
1460                 ide_unregister(index);
1461
1462         proc_ide_destroy();
1463
1464         class_destroy(ide_port_class);
1465
1466         bus_unregister(&ide_bus_type);
1467 }
1468
1469 #else /* !MODULE */
1470
1471 __setup("", ide_setup);
1472
1473 module_init(ide_init);
1474
1475 #endif /* MODULE */