ide: remove stale version number
[sfrench/cifs-2.6.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 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
82                                         IDE2_MAJOR, IDE3_MAJOR,
83                                         IDE4_MAJOR, IDE5_MAJOR,
84                                         IDE6_MAJOR, IDE7_MAJOR,
85                                         IDE8_MAJOR, IDE9_MAJOR };
86
87 static int idebus_parameter;    /* holds the "idebus=" parameter */
88 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
89
90 DEFINE_MUTEX(ide_cfg_mtx);
91  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
92
93 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
94 int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
95 #endif
96
97 int noautodma = 0;
98
99 #ifdef CONFIG_BLK_DEV_IDEACPI
100 int ide_noacpi = 0;
101 int ide_noacpitfs = 1;
102 int ide_noacpionboot = 1;
103 #endif
104
105 /*
106  * This is declared extern in ide.h, for access by other IDE modules:
107  */
108 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
109
110 EXPORT_SYMBOL(ide_hwifs);
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         unsigned int unit;
118
119         /* bulk initialize hwif & drive info with zeros */
120         memset(hwif, 0, sizeof(ide_hwif_t));
121
122         /* fill in any non-zero initial values */
123         hwif->index     = index;
124         hwif->major     = ide_hwif_to_major[index];
125
126         hwif->name[0]   = 'i';
127         hwif->name[1]   = 'd';
128         hwif->name[2]   = 'e';
129         hwif->name[3]   = '0' + index;
130
131         hwif->bus_state = BUSSTATE_ON;
132
133         init_completion(&hwif->gendev_rel_comp);
134
135         default_hwif_iops(hwif);
136         default_hwif_transport(hwif);
137         for (unit = 0; unit < MAX_DRIVES; ++unit) {
138                 ide_drive_t *drive = &hwif->drives[unit];
139
140                 drive->media                    = ide_disk;
141                 drive->select.all               = (unit<<4)|0xa0;
142                 drive->hwif                     = hwif;
143                 drive->ctl                      = 0x08;
144                 drive->ready_stat               = READY_STAT;
145                 drive->bad_wstat                = BAD_W_STAT;
146                 drive->special.b.recalibrate    = 1;
147                 drive->special.b.set_geometry   = 1;
148                 drive->name[0]                  = 'h';
149                 drive->name[1]                  = 'd';
150                 drive->name[2]                  = 'a' + (index * MAX_DRIVES) + unit;
151                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
152                 drive->using_dma                = 0;
153                 drive->vdma                     = 0;
154                 INIT_LIST_HEAD(&drive->list);
155                 init_completion(&drive->gendev_rel_comp);
156         }
157 }
158 EXPORT_SYMBOL_GPL(ide_init_port_data);
159
160 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
161 {
162         hw_regs_t hw;
163
164         memset(&hw, 0, sizeof(hw_regs_t));
165
166         ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
167
168         memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
169
170         hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
171 #ifdef CONFIG_BLK_DEV_HD
172         if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
173                 hwif->noprobe = 1;      /* may be overridden by ide_setup() */
174 #endif
175 }
176
177 /*
178  * init_ide_data() sets reasonable default values into all fields
179  * of all instances of the hwifs and drives, but only on the first call.
180  * Subsequent calls have no effect (they don't wipe out anything).
181  *
182  * This routine is normally called at driver initialization time,
183  * but may also be called MUCH earlier during kernel "command-line"
184  * parameter processing.  As such, we cannot depend on any other parts
185  * of the kernel (such as memory allocation) to be functioning yet.
186  *
187  * This is too bad, as otherwise we could dynamically allocate the
188  * ide_drive_t structs as needed, rather than always consuming memory
189  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
190  *
191  * FIXME: We should stuff the setup data into __init and copy the
192  * relevant hwifs/allocate them properly during boot.
193  */
194 #define MAGIC_COOKIE 0x12345678
195 static void __init init_ide_data (void)
196 {
197         ide_hwif_t *hwif;
198         unsigned int index;
199         static unsigned long magic_cookie = MAGIC_COOKIE;
200
201         if (magic_cookie != MAGIC_COOKIE)
202                 return;         /* already initialized */
203         magic_cookie = 0;
204
205         /* Initialise all interface structures */
206         for (index = 0; index < MAX_HWIFS; ++index) {
207                 hwif = &ide_hwifs[index];
208                 ide_init_port_data(hwif, index);
209                 init_hwif_default(hwif, index);
210 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
211                 hwif->irq =
212                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
213 #endif
214         }
215 }
216
217 /**
218  *      ide_system_bus_speed    -       guess bus speed
219  *
220  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
221  *      bus speed (in MHz). This is used for calculating interface PIO timings.
222  *      The default is 40 for known PCI systems, 50 otherwise.
223  *      The "idebus=xx" parameter can be used to override this value.
224  *      The actual value to be used is computed/displayed the first time
225  *      through. Drivers should only use this as a last resort.
226  *
227  *      Returns a guessed speed in MHz.
228  */
229
230 static int ide_system_bus_speed(void)
231 {
232 #ifdef CONFIG_PCI
233         static struct pci_device_id pci_default[] = {
234                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
235                 { }
236         };
237 #else
238 #define pci_default 0
239 #endif /* CONFIG_PCI */
240
241         /* user supplied value */
242         if (idebus_parameter)
243                 return idebus_parameter;
244
245         /* safe default value for PCI or VESA and PCI*/
246         return pci_dev_present(pci_default) ? 33 : 50;
247 }
248
249 ide_hwif_t * ide_find_port(unsigned long base)
250 {
251         ide_hwif_t *hwif;
252         int i;
253
254         for (i = 0; i < MAX_HWIFS; i++) {
255                 hwif = &ide_hwifs[i];
256                 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
257                         goto found;
258         }
259
260         for (i = 0; i < MAX_HWIFS; i++) {
261                 hwif = &ide_hwifs[i];
262                 if (hwif->io_ports[IDE_DATA_OFFSET] == 0)
263                         goto found;
264         }
265
266         hwif = NULL;
267 found:
268         return hwif;
269 }
270
271 EXPORT_SYMBOL_GPL(ide_find_port);
272
273 static struct resource* hwif_request_region(ide_hwif_t *hwif,
274                                             unsigned long addr, int num)
275 {
276         struct resource *res = request_region(addr, num, hwif->name);
277
278         if (!res)
279                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
280                                 hwif->name, addr, addr+num-1);
281         return res;
282 }
283
284 /**
285  *      ide_hwif_request_regions - request resources for IDE
286  *      @hwif: interface to use
287  *
288  *      Requests all the needed resources for an interface.
289  *      Right now core IDE code does this work which is deeply wrong.
290  *      MMIO leaves it to the controller driver,
291  *      PIO will migrate this way over time.
292  */
293
294 int ide_hwif_request_regions(ide_hwif_t *hwif)
295 {
296         unsigned long addr;
297         unsigned int i;
298
299         if (hwif->mmio)
300                 return 0;
301         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
302         if (addr && !hwif_request_region(hwif, addr, 1))
303                 goto control_region_busy;
304         hwif->straight8 = 0;
305         addr = hwif->io_ports[IDE_DATA_OFFSET];
306         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
307                 if (!hwif_request_region(hwif, addr, 8))
308                         goto data_region_busy;
309                 hwif->straight8 = 1;
310                 return 0;
311         }
312         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
313                 addr = hwif->io_ports[i];
314                 if (!hwif_request_region(hwif, addr, 1)) {
315                         while (--i)
316                                 release_region(addr, 1);
317                         goto data_region_busy;
318                 }
319         }
320         return 0;
321
322 data_region_busy:
323         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
324         if (addr)
325                 release_region(addr, 1);
326 control_region_busy:
327         /* If any errors are return, we drop the hwif interface. */
328         return -EBUSY;
329 }
330
331 /**
332  *      ide_hwif_release_regions - free IDE resources
333  *
334  *      Note that we only release the standard ports,
335  *      and do not even try to handle any extra ports
336  *      allocated for weird IDE interface chipsets.
337  *
338  *      Note also that we don't yet handle mmio resources here. More
339  *      importantly our caller should be doing this so we need to 
340  *      restructure this as a helper function for drivers.
341  */
342
343 void ide_hwif_release_regions(ide_hwif_t *hwif)
344 {
345         u32 i = 0;
346
347         if (hwif->mmio)
348                 return;
349         if (hwif->io_ports[IDE_CONTROL_OFFSET])
350                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
351         if (hwif->straight8) {
352                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
353                 return;
354         }
355         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
356                 if (hwif->io_ports[i])
357                         release_region(hwif->io_ports[i], 1);
358 }
359
360 /**
361  *      ide_hwif_restore        -       restore hwif to template
362  *      @hwif: hwif to update
363  *      @tmp_hwif: template
364  *
365  *      Restore hwif to a previous state by copying most settings
366  *      from the template.
367  */
368
369 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
370 {
371         hwif->hwgroup                   = tmp_hwif->hwgroup;
372
373         hwif->gendev.parent             = tmp_hwif->gendev.parent;
374
375         hwif->proc                      = tmp_hwif->proc;
376
377         hwif->major                     = tmp_hwif->major;
378         hwif->straight8                 = tmp_hwif->straight8;
379         hwif->bus_state                 = tmp_hwif->bus_state;
380
381         hwif->host_flags                = tmp_hwif->host_flags;
382
383         hwif->pio_mask                  = tmp_hwif->pio_mask;
384
385         hwif->ultra_mask                = tmp_hwif->ultra_mask;
386         hwif->mwdma_mask                = tmp_hwif->mwdma_mask;
387         hwif->swdma_mask                = tmp_hwif->swdma_mask;
388
389         hwif->cbl                       = tmp_hwif->cbl;
390
391         hwif->chipset                   = tmp_hwif->chipset;
392         hwif->hold                      = tmp_hwif->hold;
393
394         hwif->dev                       = tmp_hwif->dev;
395
396 #ifdef CONFIG_BLK_DEV_IDEPCI
397         hwif->cds                       = tmp_hwif->cds;
398 #endif
399
400         hwif->set_pio_mode              = tmp_hwif->set_pio_mode;
401         hwif->set_dma_mode              = tmp_hwif->set_dma_mode;
402         hwif->mdma_filter               = tmp_hwif->mdma_filter;
403         hwif->udma_filter               = tmp_hwif->udma_filter;
404         hwif->selectproc                = tmp_hwif->selectproc;
405         hwif->reset_poll                = tmp_hwif->reset_poll;
406         hwif->pre_reset                 = tmp_hwif->pre_reset;
407         hwif->resetproc                 = tmp_hwif->resetproc;
408         hwif->maskproc                  = tmp_hwif->maskproc;
409         hwif->quirkproc                 = tmp_hwif->quirkproc;
410         hwif->busproc                   = tmp_hwif->busproc;
411
412         hwif->ata_input_data            = tmp_hwif->ata_input_data;
413         hwif->ata_output_data           = tmp_hwif->ata_output_data;
414         hwif->atapi_input_bytes         = tmp_hwif->atapi_input_bytes;
415         hwif->atapi_output_bytes        = tmp_hwif->atapi_output_bytes;
416
417         hwif->dma_host_set              = tmp_hwif->dma_host_set;
418         hwif->dma_setup                 = tmp_hwif->dma_setup;
419         hwif->dma_exec_cmd              = tmp_hwif->dma_exec_cmd;
420         hwif->dma_start                 = tmp_hwif->dma_start;
421         hwif->ide_dma_end               = tmp_hwif->ide_dma_end;
422         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
423         hwif->ide_dma_clear_irq         = tmp_hwif->ide_dma_clear_irq;
424         hwif->dma_lost_irq              = tmp_hwif->dma_lost_irq;
425         hwif->dma_timeout               = tmp_hwif->dma_timeout;
426
427         hwif->OUTB                      = tmp_hwif->OUTB;
428         hwif->OUTBSYNC                  = tmp_hwif->OUTBSYNC;
429         hwif->OUTW                      = tmp_hwif->OUTW;
430         hwif->OUTSW                     = tmp_hwif->OUTSW;
431         hwif->OUTSL                     = tmp_hwif->OUTSL;
432
433         hwif->INB                       = tmp_hwif->INB;
434         hwif->INW                       = tmp_hwif->INW;
435         hwif->INSW                      = tmp_hwif->INSW;
436         hwif->INSL                      = tmp_hwif->INSL;
437
438         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
439
440         hwif->mmio                      = tmp_hwif->mmio;
441         hwif->rqsize                    = tmp_hwif->rqsize;
442
443 #ifndef CONFIG_BLK_DEV_IDECS
444         hwif->irq                       = tmp_hwif->irq;
445 #endif
446
447         hwif->dma_base                  = tmp_hwif->dma_base;
448         hwif->dma_command               = tmp_hwif->dma_command;
449         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
450         hwif->dma_status                = tmp_hwif->dma_status;
451         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
452         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
453
454         hwif->config_data               = tmp_hwif->config_data;
455         hwif->select_data               = tmp_hwif->select_data;
456         hwif->extra_base                = tmp_hwif->extra_base;
457         hwif->extra_ports               = tmp_hwif->extra_ports;
458
459         hwif->hwif_data                 = tmp_hwif->hwif_data;
460 }
461
462 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
463 {
464         ide_hwgroup_t *hwgroup = hwif->hwgroup;
465
466         spin_lock_irq(&ide_lock);
467         /*
468          * Remove us from the hwgroup, and free
469          * the hwgroup if we were the only member
470          */
471         if (hwif->next == hwif) {
472                 BUG_ON(hwgroup->hwif != hwif);
473                 kfree(hwgroup);
474         } else {
475                 /* There is another interface in hwgroup.
476                  * Unlink us, and set hwgroup->drive and ->hwif to
477                  * something sane.
478                  */
479                 ide_hwif_t *g = hwgroup->hwif;
480
481                 while (g->next != hwif)
482                         g = g->next;
483                 g->next = hwif->next;
484                 if (hwgroup->hwif == hwif) {
485                         /* Chose a random hwif for hwgroup->hwif.
486                          * It's guaranteed that there are no drives
487                          * left in the hwgroup.
488                          */
489                         BUG_ON(hwgroup->drive != NULL);
490                         hwgroup->hwif = g;
491                 }
492                 BUG_ON(hwgroup->hwif == hwif);
493         }
494         spin_unlock_irq(&ide_lock);
495 }
496
497 /**
498  *      ide_unregister          -       free an IDE interface
499  *      @index: index of interface (will change soon to a pointer)
500  *      @init_default: init default hwif flag
501  *      @restore: restore hwif flag
502  *
503  *      Perform the final unregister of an IDE interface. At the moment
504  *      we don't refcount interfaces so this will also get split up.
505  *
506  *      Locking:
507  *      The caller must not hold the IDE locks
508  *      The drive present/vanishing is not yet properly locked
509  *      Take care with the callbacks. These have been split to avoid
510  *      deadlocking the IDE layer. The shutdown callback is called
511  *      before we take the lock and free resources. It is up to the
512  *      caller to be sure there is no pending I/O here, and that
513  *      the interface will not be reopened (present/vanishing locking
514  *      isn't yet done BTW). After we commit to the final kill we
515  *      call the cleanup callback with the ide locks held.
516  *
517  *      Unregister restores the hwif structures to the default state.
518  *      This is raving bonkers.
519  */
520
521 void ide_unregister(unsigned int index, int init_default, int restore)
522 {
523         ide_drive_t *drive;
524         ide_hwif_t *hwif, *g;
525         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
526         ide_hwgroup_t *hwgroup;
527         int irq_count = 0, unit;
528
529         BUG_ON(index >= MAX_HWIFS);
530
531         BUG_ON(in_interrupt());
532         BUG_ON(irqs_disabled());
533         mutex_lock(&ide_cfg_mtx);
534         spin_lock_irq(&ide_lock);
535         hwif = &ide_hwifs[index];
536         if (!hwif->present)
537                 goto abort;
538         for (unit = 0; unit < MAX_DRIVES; ++unit) {
539                 drive = &hwif->drives[unit];
540                 if (!drive->present)
541                         continue;
542                 spin_unlock_irq(&ide_lock);
543                 device_unregister(&drive->gendev);
544                 wait_for_completion(&drive->gendev_rel_comp);
545                 spin_lock_irq(&ide_lock);
546         }
547         hwif->present = 0;
548
549         spin_unlock_irq(&ide_lock);
550
551         ide_proc_unregister_port(hwif);
552
553         hwgroup = hwif->hwgroup;
554         /*
555          * free the irq if we were the only hwif using it
556          */
557         g = hwgroup->hwif;
558         do {
559                 if (g->irq == hwif->irq)
560                         ++irq_count;
561                 g = g->next;
562         } while (g != hwgroup->hwif);
563         if (irq_count == 1)
564                 free_irq(hwif->irq, hwgroup);
565
566         ide_remove_port_from_hwgroup(hwif);
567
568         device_unregister(&hwif->gendev);
569         wait_for_completion(&hwif->gendev_rel_comp);
570
571         /*
572          * Remove us from the kernel's knowledge
573          */
574         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
575         kfree(hwif->sg_table);
576         unregister_blkdev(hwif->major, hwif->name);
577         spin_lock_irq(&ide_lock);
578
579         if (hwif->dma_base) {
580                 (void) ide_release_dma(hwif);
581
582                 hwif->dma_base = 0;
583                 hwif->dma_command = 0;
584                 hwif->dma_vendor1 = 0;
585                 hwif->dma_status = 0;
586                 hwif->dma_vendor3 = 0;
587                 hwif->dma_prdtable = 0;
588
589                 hwif->extra_base  = 0;
590                 hwif->extra_ports = 0;
591         }
592
593         /*
594          * Note that we only release the standard ports,
595          * and do not even try to handle any extra ports
596          * allocated for weird IDE interface chipsets.
597          */
598         ide_hwif_release_regions(hwif);
599
600         /* copy original settings */
601         tmp_hwif = *hwif;
602
603         /* restore hwif data to pristine status */
604         ide_init_port_data(hwif, index);
605
606         if (init_default)
607                 init_hwif_default(hwif, index);
608
609         if (restore)
610                 ide_hwif_restore(hwif, &tmp_hwif);
611
612 abort:
613         spin_unlock_irq(&ide_lock);
614         mutex_unlock(&ide_cfg_mtx);
615 }
616
617 EXPORT_SYMBOL(ide_unregister);
618
619 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
620 {
621         memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
622         hwif->irq = hw->irq;
623         hwif->noprobe = 0;
624         hwif->chipset = hw->chipset;
625         hwif->gendev.parent = hw->dev;
626         hwif->ack_intr = hw->ack_intr;
627 }
628 EXPORT_SYMBOL_GPL(ide_init_port_hw);
629
630 ide_hwif_t *ide_deprecated_find_port(unsigned long base)
631 {
632         ide_hwif_t *hwif;
633         int i;
634
635         for (i = 0; i < MAX_HWIFS; i++) {
636                 hwif = &ide_hwifs[i];
637                 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
638                         goto found;
639         }
640
641         for (i = 0; i < MAX_HWIFS; i++) {
642                 hwif = &ide_hwifs[i];
643                 if (hwif->hold)
644                         continue;
645                 if (!hwif->present && hwif->mate == NULL)
646                         goto found;
647         }
648
649         hwif = NULL;
650 found:
651         return hwif;
652 }
653 EXPORT_SYMBOL_GPL(ide_deprecated_find_port);
654
655 /**
656  *      ide_register_hw         -       register IDE interface
657  *      @hw: hardware registers
658  *      @quirkproc: quirkproc function
659  *      @hwifp: pointer to returned hwif
660  *
661  *      Register an IDE interface, specifying exactly the registers etc.
662  *
663  *      Returns -1 on error.
664  */
665
666 int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
667                     ide_hwif_t **hwifp)
668 {
669         int index, retry = 1;
670         ide_hwif_t *hwif;
671         u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
672
673         do {
674                 hwif = ide_deprecated_find_port(hw->io_ports[IDE_DATA_OFFSET]);
675                 index = hwif->index;
676                 if (hwif)
677                         goto found;
678                 for (index = 0; index < MAX_HWIFS; index++)
679                         ide_unregister(index, 1, 1);
680         } while (retry--);
681         return -1;
682 found:
683         if (hwif->present)
684                 ide_unregister(index, 0, 1);
685         else if (!hwif->hold)
686                 ide_init_port_data(hwif, index);
687
688         ide_init_port_hw(hwif, hw);
689         hwif->quirkproc = quirkproc;
690
691         idx[0] = index;
692
693         ide_device_add(idx, NULL);
694
695         if (hwifp)
696                 *hwifp = hwif;
697
698         return hwif->present ? index : -1;
699 }
700
701 EXPORT_SYMBOL(ide_register_hw);
702
703 /*
704  *      Locks for IDE setting functionality
705  */
706
707 DEFINE_MUTEX(ide_setting_mtx);
708
709 EXPORT_SYMBOL_GPL(ide_setting_mtx);
710
711 /**
712  *      ide_spin_wait_hwgroup   -       wait for group
713  *      @drive: drive in the group
714  *
715  *      Wait for an IDE device group to go non busy and then return
716  *      holding the ide_lock which guards the hwgroup->busy status
717  *      and right to use it.
718  */
719
720 int ide_spin_wait_hwgroup (ide_drive_t *drive)
721 {
722         ide_hwgroup_t *hwgroup = HWGROUP(drive);
723         unsigned long timeout = jiffies + (3 * HZ);
724
725         spin_lock_irq(&ide_lock);
726
727         while (hwgroup->busy) {
728                 unsigned long lflags;
729                 spin_unlock_irq(&ide_lock);
730                 local_irq_set(lflags);
731                 if (time_after(jiffies, timeout)) {
732                         local_irq_restore(lflags);
733                         printk(KERN_ERR "%s: channel busy\n", drive->name);
734                         return -EBUSY;
735                 }
736                 local_irq_restore(lflags);
737                 spin_lock_irq(&ide_lock);
738         }
739         return 0;
740 }
741
742 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
743
744 int set_io_32bit(ide_drive_t *drive, int arg)
745 {
746         if (drive->no_io_32bit)
747                 return -EPERM;
748
749         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
750                 return -EINVAL;
751
752         if (ide_spin_wait_hwgroup(drive))
753                 return -EBUSY;
754
755         drive->io_32bit = arg;
756
757         spin_unlock_irq(&ide_lock);
758
759         return 0;
760 }
761
762 static int set_ksettings(ide_drive_t *drive, int arg)
763 {
764         if (arg < 0 || arg > 1)
765                 return -EINVAL;
766
767         if (ide_spin_wait_hwgroup(drive))
768                 return -EBUSY;
769         drive->keep_settings = arg;
770         spin_unlock_irq(&ide_lock);
771
772         return 0;
773 }
774
775 int set_using_dma(ide_drive_t *drive, int arg)
776 {
777 #ifdef CONFIG_BLK_DEV_IDEDMA
778         ide_hwif_t *hwif = drive->hwif;
779         int err = -EPERM;
780
781         if (arg < 0 || arg > 1)
782                 return -EINVAL;
783
784         if (!drive->id || !(drive->id->capability & 1))
785                 goto out;
786
787         if (hwif->dma_host_set == NULL)
788                 goto out;
789
790         err = -EBUSY;
791         if (ide_spin_wait_hwgroup(drive))
792                 goto out;
793         /*
794          * set ->busy flag, unlock and let it ride
795          */
796         hwif->hwgroup->busy = 1;
797         spin_unlock_irq(&ide_lock);
798
799         err = 0;
800
801         if (arg) {
802                 if (ide_set_dma(drive))
803                         err = -EIO;
804         } else
805                 ide_dma_off(drive);
806
807         /*
808          * lock, clear ->busy flag and unlock before leaving
809          */
810         spin_lock_irq(&ide_lock);
811         hwif->hwgroup->busy = 0;
812         spin_unlock_irq(&ide_lock);
813 out:
814         return err;
815 #else
816         if (arg < 0 || arg > 1)
817                 return -EINVAL;
818
819         return -EPERM;
820 #endif
821 }
822
823 int set_pio_mode(ide_drive_t *drive, int arg)
824 {
825         struct request rq;
826
827         if (arg < 0 || arg > 255)
828                 return -EINVAL;
829
830         if (drive->hwif->set_pio_mode == NULL)
831                 return -ENOSYS;
832
833         if (drive->special.b.set_tune)
834                 return -EBUSY;
835
836         ide_init_drive_cmd(&rq);
837         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
838
839         drive->tune_req = (u8) arg;
840         drive->special.b.set_tune = 1;
841         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
842         return 0;
843 }
844
845 static int set_unmaskirq(ide_drive_t *drive, int arg)
846 {
847         if (drive->no_unmask)
848                 return -EPERM;
849
850         if (arg < 0 || arg > 1)
851                 return -EINVAL;
852
853         if (ide_spin_wait_hwgroup(drive))
854                 return -EBUSY;
855         drive->unmask = arg;
856         spin_unlock_irq(&ide_lock);
857
858         return 0;
859 }
860
861 /**
862  *      system_bus_clock        -       clock guess
863  *
864  *      External version of the bus clock guess used by very old IDE drivers
865  *      for things like VLB timings. Should not be used.
866  */
867
868 int system_bus_clock (void)
869 {
870         return system_bus_speed;
871 }
872
873 EXPORT_SYMBOL(system_bus_clock);
874
875 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
876 {
877         ide_drive_t *drive = dev->driver_data;
878         ide_hwif_t *hwif = HWIF(drive);
879         struct request rq;
880         struct request_pm_state rqpm;
881         ide_task_t args;
882         int ret;
883
884         /* Call ACPI _GTM only once */
885         if (!(drive->dn % 2))
886                 ide_acpi_get_timing(hwif);
887
888         memset(&rq, 0, sizeof(rq));
889         memset(&rqpm, 0, sizeof(rqpm));
890         memset(&args, 0, sizeof(args));
891         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
892         rq.special = &args;
893         rq.data = &rqpm;
894         rqpm.pm_step = ide_pm_state_start_suspend;
895         if (mesg.event == PM_EVENT_PRETHAW)
896                 mesg.event = PM_EVENT_FREEZE;
897         rqpm.pm_state = mesg.event;
898
899         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
900         /* only call ACPI _PS3 after both drivers are suspended */
901         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
902                  && hwif->drives[1].present)
903                  || !hwif->drives[0].present
904                  || !hwif->drives[1].present))
905                 ide_acpi_set_state(hwif, 0);
906         return ret;
907 }
908
909 static int generic_ide_resume(struct device *dev)
910 {
911         ide_drive_t *drive = dev->driver_data;
912         ide_hwif_t *hwif = HWIF(drive);
913         struct request rq;
914         struct request_pm_state rqpm;
915         ide_task_t args;
916         int err;
917
918         /* Call ACPI _STM only once */
919         if (!(drive->dn % 2)) {
920                 ide_acpi_set_state(hwif, 1);
921                 ide_acpi_push_timing(hwif);
922         }
923
924         ide_acpi_exec_tfs(drive);
925
926         memset(&rq, 0, sizeof(rq));
927         memset(&rqpm, 0, sizeof(rqpm));
928         memset(&args, 0, sizeof(args));
929         rq.cmd_type = REQ_TYPE_PM_RESUME;
930         rq.special = &args;
931         rq.data = &rqpm;
932         rqpm.pm_step = ide_pm_state_start_resume;
933         rqpm.pm_state = PM_EVENT_ON;
934
935         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
936
937         if (err == 0 && dev->driver) {
938                 ide_driver_t *drv = to_ide_driver(dev->driver);
939
940                 if (drv->resume)
941                         drv->resume(drive);
942         }
943
944         return err;
945 }
946
947 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
948                         unsigned int cmd, unsigned long arg)
949 {
950         unsigned long flags;
951         ide_driver_t *drv;
952         void __user *p = (void __user *)arg;
953         int err = 0, (*setfunc)(ide_drive_t *, int);
954         u8 *val;
955
956         switch (cmd) {
957         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
958         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
959         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
960         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
961         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
962         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
963         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
964         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
965         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
966         }
967
968         switch (cmd) {
969                 case HDIO_OBSOLETE_IDENTITY:
970                 case HDIO_GET_IDENTITY:
971                         if (bdev != bdev->bd_contains)
972                                 return -EINVAL;
973                         if (drive->id_read == 0)
974                                 return -ENOMSG;
975                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
976                                 return -EFAULT;
977                         return 0;
978
979                 case HDIO_GET_NICE:
980                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
981                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
982                                         drive->nice1 << IDE_NICE_1,
983                                         (long __user *) arg);
984 #ifdef CONFIG_IDE_TASK_IOCTL
985                 case HDIO_DRIVE_TASKFILE:
986                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
987                                 return -EACCES;
988                         switch(drive->media) {
989                                 case ide_disk:
990                                         return ide_taskfile_ioctl(drive, cmd, arg);
991                                 default:
992                                         return -ENOMSG;
993                         }
994 #endif /* CONFIG_IDE_TASK_IOCTL */
995
996                 case HDIO_DRIVE_CMD:
997                         if (!capable(CAP_SYS_RAWIO))
998                                 return -EACCES;
999                         return ide_cmd_ioctl(drive, cmd, arg);
1000
1001                 case HDIO_DRIVE_TASK:
1002                         if (!capable(CAP_SYS_RAWIO))
1003                                 return -EACCES;
1004                         return ide_task_ioctl(drive, cmd, arg);
1005
1006                 case HDIO_SCAN_HWIF:
1007                 {
1008                         hw_regs_t hw;
1009                         int args[3];
1010                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1011                         if (copy_from_user(args, p, 3 * sizeof(int)))
1012                                 return -EFAULT;
1013                         memset(&hw, 0, sizeof(hw));
1014                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1015                                             (unsigned long) args[1], NULL);
1016                         hw.irq = args[2];
1017                         if (ide_register_hw(&hw, NULL, NULL) == -1)
1018                                 return -EIO;
1019                         return 0;
1020                 }
1021                 case HDIO_UNREGISTER_HWIF:
1022                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1023                         /* (arg > MAX_HWIFS) checked in function */
1024                         ide_unregister(arg, 1, 1);
1025                         return 0;
1026                 case HDIO_SET_NICE:
1027                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1028                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1029                                 return -EPERM;
1030                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1031                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1032                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1033                                 drive->dsc_overlap = 0;
1034                                 return -EPERM;
1035                         }
1036                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1037                         return 0;
1038                 case HDIO_DRIVE_RESET:
1039                 {
1040                         unsigned long flags;
1041                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1042                         
1043                         /*
1044                          *      Abort the current command on the
1045                          *      group if there is one, taking
1046                          *      care not to allow anything else
1047                          *      to be queued and to die on the
1048                          *      spot if we miss one somehow
1049                          */
1050
1051                         spin_lock_irqsave(&ide_lock, flags);
1052
1053                         if (HWGROUP(drive)->resetting) {
1054                                 spin_unlock_irqrestore(&ide_lock, flags);
1055                                 return -EBUSY;
1056                         }
1057
1058                         ide_abort(drive, "drive reset");
1059
1060                         BUG_ON(HWGROUP(drive)->handler);
1061                                 
1062                         /* Ensure nothing gets queued after we
1063                            drop the lock. Reset will clear the busy */
1064                    
1065                         HWGROUP(drive)->busy = 1;
1066                         spin_unlock_irqrestore(&ide_lock, flags);
1067                         (void) ide_do_reset(drive);
1068
1069                         return 0;
1070                 }
1071
1072                 case HDIO_GET_BUSSTATE:
1073                         if (!capable(CAP_SYS_ADMIN))
1074                                 return -EACCES;
1075                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1076                                 return -EFAULT;
1077                         return 0;
1078
1079                 case HDIO_SET_BUSSTATE:
1080                         if (!capable(CAP_SYS_ADMIN))
1081                                 return -EACCES;
1082                         if (HWIF(drive)->busproc)
1083                                 return HWIF(drive)->busproc(drive, (int)arg);
1084                         return -EOPNOTSUPP;
1085                 default:
1086                         return -EINVAL;
1087         }
1088
1089 read_val:
1090         mutex_lock(&ide_setting_mtx);
1091         spin_lock_irqsave(&ide_lock, flags);
1092         err = *val;
1093         spin_unlock_irqrestore(&ide_lock, flags);
1094         mutex_unlock(&ide_setting_mtx);
1095         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1096
1097 set_val:
1098         if (bdev != bdev->bd_contains)
1099                 err = -EINVAL;
1100         else {
1101                 if (!capable(CAP_SYS_ADMIN))
1102                         err = -EACCES;
1103                 else {
1104                         mutex_lock(&ide_setting_mtx);
1105                         err = setfunc(drive, arg);
1106                         mutex_unlock(&ide_setting_mtx);
1107                 }
1108         }
1109         return err;
1110 }
1111
1112 EXPORT_SYMBOL(generic_ide_ioctl);
1113
1114 /*
1115  * stridx() returns the offset of c within s,
1116  * or -1 if c is '\0' or not found within s.
1117  */
1118 static int __init stridx (const char *s, char c)
1119 {
1120         char *i = strchr(s, c);
1121         return (i && c) ? i - s : -1;
1122 }
1123
1124 /*
1125  * match_parm() does parsing for ide_setup():
1126  *
1127  * 1. the first char of s must be '='.
1128  * 2. if the remainder matches one of the supplied keywords,
1129  *     the index (1 based) of the keyword is negated and returned.
1130  * 3. if the remainder is a series of no more than max_vals numbers
1131  *     separated by commas, the numbers are saved in vals[] and a
1132  *     count of how many were saved is returned.  Base10 is assumed,
1133  *     and base16 is allowed when prefixed with "0x".
1134  * 4. otherwise, zero is returned.
1135  */
1136 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1137 {
1138         static const char *decimal = "0123456789";
1139         static const char *hex = "0123456789abcdef";
1140         int i, n;
1141
1142         if (*s++ == '=') {
1143                 /*
1144                  * Try matching against the supplied keywords,
1145                  * and return -(index+1) if we match one
1146                  */
1147                 if (keywords != NULL) {
1148                         for (i = 0; *keywords != NULL; ++i) {
1149                                 if (!strcmp(s, *keywords++))
1150                                         return -(i+1);
1151                         }
1152                 }
1153                 /*
1154                  * Look for a series of no more than "max_vals"
1155                  * numeric values separated by commas, in base10,
1156                  * or base16 when prefixed with "0x".
1157                  * Return a count of how many were found.
1158                  */
1159                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1160                         vals[n] = i;
1161                         while ((i = stridx(decimal, *++s)) >= 0)
1162                                 vals[n] = (vals[n] * 10) + i;
1163                         if (*s == 'x' && !vals[n]) {
1164                                 while ((i = stridx(hex, *++s)) >= 0)
1165                                         vals[n] = (vals[n] * 0x10) + i;
1166                         }
1167                         if (++n == max_vals)
1168                                 break;
1169                         if (*s == ',' || *s == ';')
1170                                 ++s;
1171                 }
1172                 if (!*s)
1173                         return n;
1174         }
1175         return 0;       /* zero = nothing matched */
1176 }
1177
1178 extern int probe_ali14xx;
1179 extern int probe_umc8672;
1180 extern int probe_dtc2278;
1181 extern int probe_ht6560b;
1182 extern int probe_qd65xx;
1183 extern int cmd640_vlb;
1184
1185 static int __initdata is_chipset_set[MAX_HWIFS];
1186
1187 /*
1188  * ide_setup() gets called VERY EARLY during initialization,
1189  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1190  *
1191  * Remember to update Documentation/ide.txt if you change something here.
1192  */
1193 static int __init ide_setup(char *s)
1194 {
1195         int i, vals[3];
1196         ide_hwif_t *hwif;
1197         ide_drive_t *drive;
1198         unsigned int hw, unit;
1199         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1200         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1201
1202         
1203         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1204                 return 0;                               /* driver and not us */
1205
1206         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1207                 return 0;
1208
1209         printk(KERN_INFO "ide_setup: %s", s);
1210         init_ide_data ();
1211
1212 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1213         if (!strcmp(s, "ide=doubler")) {
1214                 extern int ide_doubler;
1215
1216                 printk(" : Enabled support for IDE doublers\n");
1217                 ide_doubler = 1;
1218                 return 1;
1219         }
1220 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1221
1222         if (!strcmp(s, "ide=nodma")) {
1223                 printk(" : Prevented DMA\n");
1224                 noautodma = 1;
1225                 goto obsolete_option;
1226         }
1227
1228 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1229         if (!strcmp(s, "ide=reverse")) {
1230                 ide_scan_direction = 1;
1231                 printk(" : Enabled support for IDE inverse scan order.\n");
1232                 return 1;
1233         }
1234 #endif
1235
1236 #ifdef CONFIG_BLK_DEV_IDEACPI
1237         if (!strcmp(s, "ide=noacpi")) {
1238                 //printk(" : Disable IDE ACPI support.\n");
1239                 ide_noacpi = 1;
1240                 return 1;
1241         }
1242         if (!strcmp(s, "ide=acpigtf")) {
1243                 //printk(" : Enable IDE ACPI _GTF support.\n");
1244                 ide_noacpitfs = 0;
1245                 return 1;
1246         }
1247         if (!strcmp(s, "ide=acpionboot")) {
1248                 //printk(" : Call IDE ACPI methods on boot.\n");
1249                 ide_noacpionboot = 0;
1250                 return 1;
1251         }
1252 #endif /* CONFIG_BLK_DEV_IDEACPI */
1253
1254         /*
1255          * Look for drive options:  "hdx="
1256          */
1257         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1258                 const char *hd_words[] = {
1259                         "none", "noprobe", "nowerr", "cdrom", "nodma",
1260                         "autotune", "noautotune", "-8", "-9", "-10",
1261                         "noflush", "remap", "remap63", "scsi", NULL };
1262                 unit = s[2] - 'a';
1263                 hw   = unit / MAX_DRIVES;
1264                 unit = unit % MAX_DRIVES;
1265                 hwif = &ide_hwifs[hw];
1266                 drive = &hwif->drives[unit];
1267                 if (strncmp(s + 4, "ide-", 4) == 0) {
1268                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1269                         goto done;
1270                 }
1271                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1272                         case -1: /* "none" */
1273                         case -2: /* "noprobe" */
1274                                 drive->noprobe = 1;
1275                                 goto done;
1276                         case -3: /* "nowerr" */
1277                                 drive->bad_wstat = BAD_R_STAT;
1278                                 hwif->noprobe = 0;
1279                                 goto done;
1280                         case -4: /* "cdrom" */
1281                                 drive->present = 1;
1282                                 drive->media = ide_cdrom;
1283                                 /* an ATAPI device ignores DRDY */
1284                                 drive->ready_stat = 0;
1285                                 hwif->noprobe = 0;
1286                                 goto done;
1287                         case -5: /* nodma */
1288                                 drive->nodma = 1;
1289                                 goto done;
1290                         case -6: /* "autotune" */
1291                                 drive->autotune = IDE_TUNE_AUTO;
1292                                 goto obsolete_option;
1293                         case -7: /* "noautotune" */
1294                                 drive->autotune = IDE_TUNE_NOAUTO;
1295                                 goto obsolete_option;
1296                         case -11: /* noflush */
1297                                 drive->noflush = 1;
1298                                 goto done;
1299                         case -12: /* "remap" */
1300                                 drive->remap_0_to_1 = 1;
1301                                 goto done;
1302                         case -13: /* "remap63" */
1303                                 drive->sect0 = 63;
1304                                 goto done;
1305                         case -14: /* "scsi" */
1306                                 drive->scsi = 1;
1307                                 goto done;
1308                         case 3: /* cyl,head,sect */
1309                                 drive->media    = ide_disk;
1310                                 drive->ready_stat = READY_STAT;
1311                                 drive->cyl      = drive->bios_cyl  = vals[0];
1312                                 drive->head     = drive->bios_head = vals[1];
1313                                 drive->sect     = drive->bios_sect = vals[2];
1314                                 drive->present  = 1;
1315                                 drive->forced_geom = 1;
1316                                 hwif->noprobe = 0;
1317                                 goto done;
1318                         default:
1319                                 goto bad_option;
1320                 }
1321         }
1322
1323         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1324                 goto bad_option;
1325         /*
1326          * Look for bus speed option:  "idebus="
1327          */
1328         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1329                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1330                         goto bad_option;
1331                 if (vals[0] >= 20 && vals[0] <= 66) {
1332                         idebus_parameter = vals[0];
1333                 } else
1334                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1335                 goto done;
1336         }
1337         /*
1338          * Look for interface options:  "idex="
1339          */
1340         if (s[3] >= '0' && s[3] <= max_hwif) {
1341                 /*
1342                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1343                  * (-8, -9, -10) are reserved to ease the hardcoding.
1344                  */
1345                 static const char *ide_words[] = {
1346                         "noprobe", "serialize", "minus3", "minus4",
1347                         "reset", "minus6", "ata66", "minus8", "minus9",
1348                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1349                         "dtc2278", "umc8672", "ali14xx", NULL };
1350
1351                 hw_regs_t hwregs;
1352
1353                 hw = s[3] - '0';
1354                 hwif = &ide_hwifs[hw];
1355                 i = match_parm(&s[4], ide_words, vals, 3);
1356
1357                 /*
1358                  * Cryptic check to ensure chipset not already set for hwif.
1359                  * Note: we can't depend on hwif->chipset here.
1360                  */
1361                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1362                         /* chipset already specified */
1363                         if (is_chipset_set[hw])
1364                                 goto bad_option;
1365                         if (i > -18 && i <= -11) {
1366                                 /* these drivers are for "ide0=" only */
1367                                 if (hw != 0)
1368                                         goto bad_hwif;
1369                                 /* chipset already specified for 2nd port */
1370                                 if (is_chipset_set[hw+1])
1371                                         goto bad_option;
1372                         }
1373                         is_chipset_set[hw] = 1;
1374                         printk("\n");
1375                 }
1376
1377                 switch (i) {
1378 #ifdef CONFIG_BLK_DEV_ALI14XX
1379                         case -17: /* "ali14xx" */
1380                                 probe_ali14xx = 1;
1381                                 goto done;
1382 #endif
1383 #ifdef CONFIG_BLK_DEV_UMC8672
1384                         case -16: /* "umc8672" */
1385                                 probe_umc8672 = 1;
1386                                 goto done;
1387 #endif
1388 #ifdef CONFIG_BLK_DEV_DTC2278
1389                         case -15: /* "dtc2278" */
1390                                 probe_dtc2278 = 1;
1391                                 goto done;
1392 #endif
1393 #ifdef CONFIG_BLK_DEV_CMD640
1394                         case -14: /* "cmd640_vlb" */
1395                                 cmd640_vlb = 1;
1396                                 goto done;
1397 #endif
1398 #ifdef CONFIG_BLK_DEV_HT6560B
1399                         case -13: /* "ht6560b" */
1400                                 probe_ht6560b = 1;
1401                                 goto done;
1402 #endif
1403 #ifdef CONFIG_BLK_DEV_QD65XX
1404                         case -12: /* "qd65xx" */
1405                                 probe_qd65xx = 1;
1406                                 goto done;
1407 #endif
1408 #ifdef CONFIG_BLK_DEV_4DRIVES
1409                         case -11: /* "four" drives on one set of ports */
1410                         {
1411                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1412                                 mate->drives[0].select.all ^= 0x20;
1413                                 mate->drives[1].select.all ^= 0x20;
1414                                 hwif->chipset = mate->chipset = ide_4drives;
1415                                 mate->irq = hwif->irq;
1416                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1417                                 hwif->mate = mate;
1418                                 mate->mate = hwif;
1419                                 hwif->serialized = mate->serialized = 1;
1420                                 goto obsolete_option;
1421                         }
1422 #endif /* CONFIG_BLK_DEV_4DRIVES */
1423                         case -10: /* minus10 */
1424                         case -9: /* minus9 */
1425                         case -8: /* minus8 */
1426                         case -6:
1427                         case -4:
1428                         case -3:
1429                                 goto bad_option;
1430                         case -7: /* ata66 */
1431 #ifdef CONFIG_BLK_DEV_IDEPCI
1432                                 /*
1433                                  * Use ATA_CBL_PATA40_SHORT so drive side
1434                                  * cable detection is also overriden.
1435                                  */
1436                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1437                                 goto obsolete_option;
1438 #else
1439                                 goto bad_hwif;
1440 #endif
1441                         case -5: /* "reset" */
1442                                 hwif->reset = 1;
1443                                 goto obsolete_option;
1444                         case -2: /* "serialize" */
1445                                 hwif->mate = &ide_hwifs[hw^1];
1446                                 hwif->mate->mate = hwif;
1447                                 hwif->serialized = hwif->mate->serialized = 1;
1448                                 goto obsolete_option;
1449
1450                         case -1: /* "noprobe" */
1451                                 hwif->noprobe = 1;
1452                                 goto done;
1453
1454                         case 1: /* base */
1455                                 vals[1] = vals[0] + 0x206; /* default ctl */
1456                         case 2: /* base,ctl */
1457                                 vals[2] = 0;    /* default irq = probe for it */
1458                         case 3: /* base,ctl,irq */
1459                                 memset(&hwregs, 0, sizeof(hwregs));
1460                                 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1461                                 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1462                                 hwif->irq      = vals[2];
1463                                 hwif->noprobe  = 0;
1464                                 hwif->chipset  = ide_forced;
1465                                 goto obsolete_option;
1466
1467                         case 0: goto bad_option;
1468                         default:
1469                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1470                                 return 1;
1471                 }
1472         }
1473 bad_option:
1474         printk(" -- BAD OPTION\n");
1475         return 1;
1476 obsolete_option:
1477         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1478         return 1;
1479 bad_hwif:
1480         printk("-- NOT SUPPORTED ON ide%d", hw);
1481 done:
1482         printk("\n");
1483         return 1;
1484 }
1485
1486 EXPORT_SYMBOL(ide_lock);
1487
1488 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1489 {
1490         return 1;
1491 }
1492
1493 static char *media_string(ide_drive_t *drive)
1494 {
1495         switch (drive->media) {
1496         case ide_disk:
1497                 return "disk";
1498         case ide_cdrom:
1499                 return "cdrom";
1500         case ide_tape:
1501                 return "tape";
1502         case ide_floppy:
1503                 return "floppy";
1504         case ide_optical:
1505                 return "optical";
1506         default:
1507                 return "UNKNOWN";
1508         }
1509 }
1510
1511 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1512 {
1513         ide_drive_t *drive = to_ide_device(dev);
1514         return sprintf(buf, "%s\n", media_string(drive));
1515 }
1516
1517 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1518 {
1519         ide_drive_t *drive = to_ide_device(dev);
1520         return sprintf(buf, "%s\n", drive->name);
1521 }
1522
1523 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1524 {
1525         ide_drive_t *drive = to_ide_device(dev);
1526         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1527 }
1528
1529 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1530                           char *buf)
1531 {
1532         ide_drive_t *drive = to_ide_device(dev);
1533         return sprintf(buf, "%s\n", drive->id->model);
1534 }
1535
1536 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1537                              char *buf)
1538 {
1539         ide_drive_t *drive = to_ide_device(dev);
1540         return sprintf(buf, "%s\n", drive->id->fw_rev);
1541 }
1542
1543 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1544                            char *buf)
1545 {
1546         ide_drive_t *drive = to_ide_device(dev);
1547         return sprintf(buf, "%s\n", drive->id->serial_no);
1548 }
1549
1550 static struct device_attribute ide_dev_attrs[] = {
1551         __ATTR_RO(media),
1552         __ATTR_RO(drivename),
1553         __ATTR_RO(modalias),
1554         __ATTR_RO(model),
1555         __ATTR_RO(firmware),
1556         __ATTR(serial, 0400, serial_show, NULL),
1557         __ATTR_NULL
1558 };
1559
1560 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1561 {
1562         ide_drive_t *drive = to_ide_device(dev);
1563
1564         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1565         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1566         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1567         return 0;
1568 }
1569
1570 static int generic_ide_probe(struct device *dev)
1571 {
1572         ide_drive_t *drive = to_ide_device(dev);
1573         ide_driver_t *drv = to_ide_driver(dev->driver);
1574
1575         return drv->probe ? drv->probe(drive) : -ENODEV;
1576 }
1577
1578 static int generic_ide_remove(struct device *dev)
1579 {
1580         ide_drive_t *drive = to_ide_device(dev);
1581         ide_driver_t *drv = to_ide_driver(dev->driver);
1582
1583         if (drv->remove)
1584                 drv->remove(drive);
1585
1586         return 0;
1587 }
1588
1589 static void generic_ide_shutdown(struct device *dev)
1590 {
1591         ide_drive_t *drive = to_ide_device(dev);
1592         ide_driver_t *drv = to_ide_driver(dev->driver);
1593
1594         if (dev->driver && drv->shutdown)
1595                 drv->shutdown(drive);
1596 }
1597
1598 struct bus_type ide_bus_type = {
1599         .name           = "ide",
1600         .match          = ide_bus_match,
1601         .uevent         = ide_uevent,
1602         .probe          = generic_ide_probe,
1603         .remove         = generic_ide_remove,
1604         .shutdown       = generic_ide_shutdown,
1605         .dev_attrs      = ide_dev_attrs,
1606         .suspend        = generic_ide_suspend,
1607         .resume         = generic_ide_resume,
1608 };
1609
1610 EXPORT_SYMBOL_GPL(ide_bus_type);
1611
1612 /*
1613  * This is gets invoked once during initialization, to set *everything* up
1614  */
1615 static int __init ide_init(void)
1616 {
1617         int ret;
1618
1619         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1620         system_bus_speed = ide_system_bus_speed();
1621
1622         printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1623                          "for PIO modes%s\n", system_bus_speed,
1624                         idebus_parameter ? "" : "; override with idebus=xx");
1625
1626         ret = bus_register(&ide_bus_type);
1627         if (ret < 0) {
1628                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1629                 return ret;
1630         }
1631
1632         init_ide_data();
1633
1634         proc_ide_create();
1635
1636         return 0;
1637 }
1638
1639 #ifdef MODULE
1640 static char *options = NULL;
1641 module_param(options, charp, 0);
1642 MODULE_LICENSE("GPL");
1643
1644 static void __init parse_options (char *line)
1645 {
1646         char *next = line;
1647
1648         if (line == NULL || !*line)
1649                 return;
1650         while ((line = next) != NULL) {
1651                 if ((next = strchr(line,' ')) != NULL)
1652                         *next++ = 0;
1653                 if (!ide_setup(line))
1654                         printk (KERN_INFO "Unknown option '%s'\n", line);
1655         }
1656 }
1657
1658 int __init init_module (void)
1659 {
1660         parse_options(options);
1661         return ide_init();
1662 }
1663
1664 void __exit cleanup_module (void)
1665 {
1666         int index;
1667
1668         for (index = 0; index < MAX_HWIFS; ++index)
1669                 ide_unregister(index, 0, 0);
1670
1671         proc_ide_destroy();
1672
1673         bus_unregister(&ide_bus_type);
1674 }
1675
1676 #else /* !MODULE */
1677
1678 __setup("", ide_setup);
1679
1680 module_init(ide_init);
1681
1682 #endif /* MODULE */