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