[PATCH] alim15x3.c: M5229 (rev c8) support for DMA cd-writer
[linux-2.6] / drivers / ide / ide.c
1 /*
2  *  linux/drivers/ide/ide.c             Version 7.00beta2       Mar 05 2003
3  *
4  *  Copyright (C) 1994-1998  Linus Torvalds & authors (see below)
5  */
6
7 /*
8  *  Mostly written by Mark Lord  <mlord@pobox.com>
9  *                and Gadi Oxman <gadio@netvision.net.il>
10  *                and Andre Hedrick <andre@linux-ide.org>
11  *
12  *  See linux/MAINTAINERS for address of current maintainer.
13  *
14  * This is the multiple IDE interface driver, as evolved from hd.c.
15  * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
16  *   (usually 14 & 15).
17  * There can be up to two drives per interface, as per the ATA-2 spec.
18  *
19  * Primary:    ide0, port 0x1f0; major=3;  hda is minor=0; hdb is minor=64
20  * Secondary:  ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
21  * Tertiary:   ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
22  * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
23  * ...
24  *
25  *  From hd.c:
26  *  |
27  *  | It traverses the request-list, using interrupts to jump between functions.
28  *  | As nearly all functions can be called within interrupts, we may not sleep.
29  *  | Special care is recommended.  Have Fun!
30  *  |
31  *  | modified by Drew Eckhardt to check nr of hd's from the CMOS.
32  *  |
33  *  | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
34  *  | in the early extended-partition checks and added DM partitions.
35  *  |
36  *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
37  *  |
38  *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
39  *  | and general streamlining by Mark Lord (mlord@pobox.com).
40  *
41  *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
42  *
43  *      Mark Lord       (mlord@pobox.com)               (IDE Perf.Pkg)
44  *      Delman Lee      (delman@ieee.org)               ("Mr. atdisk2")
45  *      Scott Snyder    (snyder@fnald0.fnal.gov)        (ATAPI IDE cd-rom)
46  *
47  *  This was a rewrite of just about everything from hd.c, though some original
48  *  code is still sprinkled about.  Think of it as a major evolution, with
49  *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
50  *
51  *  Version 1.0 ALPHA   initial code, primary i/f working okay
52  *  Version 1.3 BETA    dual i/f on shared irq tested & working!
53  *  Version 1.4 BETA    added auto probing for irq(s)
54  *  Version 1.5 BETA    added ALPHA (untested) support for IDE cd-roms,
55  *  ...
56  * Version 5.50         allow values as small as 20 for idebus=
57  * Version 5.51         force non io_32bit in drive_cmd_intr()
58  *                      change delay_10ms() to delay_50ms() to fix problems
59  * Version 5.52         fix incorrect invalidation of removable devices
60  *                      add "hdx=slow" command line option
61  * Version 5.60         start to modularize the driver; the disk and ATAPI
62  *                       drivers can be compiled as loadable modules.
63  *                      move IDE probe code to ide-probe.c
64  *                      move IDE disk code to ide-disk.c
65  *                      add support for generic IDE device subdrivers
66  *                      add m68k code from Geert Uytterhoeven
67  *                      probe all interfaces by default
68  *                      add ioctl to (re)probe an interface
69  * Version 6.00         use per device request queues
70  *                      attempt to optimize shared hwgroup performance
71  *                      add ioctl to manually adjust bandwidth algorithms
72  *                      add kerneld support for the probe module
73  *                      fix bug in ide_error()
74  *                      fix bug in the first ide_get_lock() call for Atari
75  *                      don't flush leftover data for ATAPI devices
76  * Version 6.01         clear hwgroup->active while the hwgroup sleeps
77  *                      support HDIO_GETGEO for floppies
78  * Version 6.02         fix ide_ack_intr() call
79  *                      check partition table on floppies
80  * Version 6.03         handle bad status bit sequencing in ide_wait_stat()
81  * Version 6.10         deleted old entries from this list of updates
82  *                      replaced triton.c with ide-dma.c generic PCI DMA
83  *                      added support for BIOS-enabled UltraDMA
84  *                      rename all "promise" things to "pdc4030"
85  *                      fix EZ-DRIVE handling on small disks
86  * Version 6.11         fix probe error in ide_scan_devices()
87  *                      fix ancient "jiffies" polling bugs
88  *                      mask all hwgroup interrupts on each irq entry
89  * Version 6.12         integrate ioctl and proc interfaces
90  *                      fix parsing of "idex=" command line parameter
91  * Version 6.13         add support for ide4/ide5 courtesy rjones@orchestream.com
92  * Version 6.14         fixed IRQ sharing among PCI devices
93  * Version 6.15         added SMP awareness to IDE drivers
94  * Version 6.16         fixed various bugs; even more SMP friendly
95  * Version 6.17         fix for newest EZ-Drive problem
96  * Version 6.18         default unpartitioned-disk translation now "BIOS LBA"
97  * Version 6.19         Re-design for a UNIFORM driver for all platforms,
98  *                        model based on suggestions from Russell King and
99  *                        Geert Uytterhoeven
100  *                      Promise DC4030VL now supported.
101  *                      add support for ide6/ide7
102  *                      delay_50ms() changed to ide_delay_50ms() and exported.
103  * Version 6.20         Added/Fixed Generic ATA-66 support and hwif detection.
104  *                      Added hdx=flash to allow for second flash disk
105  *                        detection w/o the hang loop.
106  *                      Added support for ide8/ide9
107  *                      Added idex=ata66 for the quirky chipsets that are
108  *                        ATA-66 compliant, but have yet to determine a method
109  *                        of verification of the 80c cable presence.
110  *                        Specifically Promise's PDC20262 chipset.
111  * Version 6.21         Fixing/Fixed SMP spinlock issue with insight from an old
112  *                        hat that clarified original low level driver design.
113  * Version 6.30         Added SMP support; fixed multmode issues.  -ml
114  * Version 6.31         Debug Share INTR's and request queue streaming
115  *                      Native ATA-100 support
116  *                      Prep for Cascades Project
117  * Version 7.00alpha    First named revision of ide rearrange
118  *
119  *  Some additional driver compile-time options are in ./include/linux/ide.h
120  *
121  *  To do, in likely order of completion:
122  *      - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
123  *
124  */
125
126 #define REVISION        "Revision: 7.00alpha2"
127 #define VERSION         "Id: ide.c 7.00a2 20020906"
128
129 #undef REALLY_SLOW_IO           /* most systems can safely undef this */
130
131 #define _IDE_C                  /* Tell ide.h it's really us */
132
133 #include <linux/module.h>
134 #include <linux/types.h>
135 #include <linux/string.h>
136 #include <linux/kernel.h>
137 #include <linux/timer.h>
138 #include <linux/mm.h>
139 #include <linux/interrupt.h>
140 #include <linux/major.h>
141 #include <linux/errno.h>
142 #include <linux/genhd.h>
143 #include <linux/blkpg.h>
144 #include <linux/slab.h>
145 #include <linux/init.h>
146 #include <linux/pci.h>
147 #include <linux/delay.h>
148 #include <linux/ide.h>
149 #include <linux/completion.h>
150 #include <linux/reboot.h>
151 #include <linux/cdrom.h>
152 #include <linux/seq_file.h>
153 #include <linux/device.h>
154 #include <linux/bitops.h>
155
156 #include <asm/byteorder.h>
157 #include <asm/irq.h>
158 #include <asm/uaccess.h>
159 #include <asm/io.h>
160
161
162 /* default maximum number of failures */
163 #define IDE_DEFAULT_MAX_FAILURES        1
164
165 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
166                                         IDE2_MAJOR, IDE3_MAJOR,
167                                         IDE4_MAJOR, IDE5_MAJOR,
168                                         IDE6_MAJOR, IDE7_MAJOR,
169                                         IDE8_MAJOR, IDE9_MAJOR };
170
171 static int idebus_parameter;    /* holds the "idebus=" parameter */
172 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
173 static int initializing;        /* set while initializing built-in drivers */
174
175 DECLARE_MUTEX(ide_cfg_sem);
176  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
177
178 #ifdef CONFIG_BLK_DEV_IDEPCI
179 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
180 #endif
181
182 #ifdef CONFIG_IDEDMA_AUTO
183 int noautodma = 0;
184 #else
185 int noautodma = 1;
186 #endif
187
188 EXPORT_SYMBOL(noautodma);
189
190 /*
191  * This is declared extern in ide.h, for access by other IDE modules:
192  */
193 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
194
195 EXPORT_SYMBOL(ide_hwifs);
196
197 /*
198  * Do not even *think* about calling this!
199  */
200 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
201 {
202         unsigned int unit;
203
204         /* bulk initialize hwif & drive info with zeros */
205         memset(hwif, 0, sizeof(ide_hwif_t));
206
207         /* fill in any non-zero initial values */
208         hwif->index     = index;
209         hwif->major     = ide_hwif_to_major[index];
210
211         hwif->name[0]   = 'i';
212         hwif->name[1]   = 'd';
213         hwif->name[2]   = 'e';
214         hwif->name[3]   = '0' + index;
215
216         hwif->bus_state = BUSSTATE_ON;
217
218         hwif->atapi_dma = 0;            /* disable all atapi dma */ 
219         hwif->ultra_mask = 0x80;        /* disable all ultra */
220         hwif->mwdma_mask = 0x80;        /* disable all mwdma */
221         hwif->swdma_mask = 0x80;        /* disable all swdma */
222
223         init_completion(&hwif->gendev_rel_comp);
224
225         default_hwif_iops(hwif);
226         default_hwif_transport(hwif);
227         for (unit = 0; unit < MAX_DRIVES; ++unit) {
228                 ide_drive_t *drive = &hwif->drives[unit];
229
230                 drive->media                    = ide_disk;
231                 drive->select.all               = (unit<<4)|0xa0;
232                 drive->hwif                     = hwif;
233                 drive->ctl                      = 0x08;
234                 drive->ready_stat               = READY_STAT;
235                 drive->bad_wstat                = BAD_W_STAT;
236                 drive->special.b.recalibrate    = 1;
237                 drive->special.b.set_geometry   = 1;
238                 drive->name[0]                  = 'h';
239                 drive->name[1]                  = 'd';
240                 drive->name[2]                  = 'a' + (index * MAX_DRIVES) + unit;
241                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
242                 drive->using_dma                = 0;
243                 drive->vdma                     = 0;
244                 INIT_LIST_HEAD(&drive->list);
245                 init_completion(&drive->gendev_rel_comp);
246         }
247 }
248
249 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
250 {
251         hw_regs_t hw;
252
253         memset(&hw, 0, sizeof(hw_regs_t));
254
255         ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
256
257         memcpy(&hwif->hw, &hw, sizeof(hw));
258         memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
259
260         hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
261 #ifdef CONFIG_BLK_DEV_HD
262         if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
263                 hwif->noprobe = 1;      /* may be overridden by ide_setup() */
264 #endif
265 }
266
267 extern void ide_arm_init(void);
268
269 /*
270  * init_ide_data() sets reasonable default values into all fields
271  * of all instances of the hwifs and drives, but only on the first call.
272  * Subsequent calls have no effect (they don't wipe out anything).
273  *
274  * This routine is normally called at driver initialization time,
275  * but may also be called MUCH earlier during kernel "command-line"
276  * parameter processing.  As such, we cannot depend on any other parts
277  * of the kernel (such as memory allocation) to be functioning yet.
278  *
279  * This is too bad, as otherwise we could dynamically allocate the
280  * ide_drive_t structs as needed, rather than always consuming memory
281  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
282  *
283  * FIXME: We should stuff the setup data into __init and copy the
284  * relevant hwifs/allocate them properly during boot.
285  */
286 #define MAGIC_COOKIE 0x12345678
287 static void __init init_ide_data (void)
288 {
289         ide_hwif_t *hwif;
290         unsigned int index;
291         static unsigned long magic_cookie = MAGIC_COOKIE;
292
293         if (magic_cookie != MAGIC_COOKIE)
294                 return;         /* already initialized */
295         magic_cookie = 0;
296
297         /* Initialise all interface structures */
298         for (index = 0; index < MAX_HWIFS; ++index) {
299                 hwif = &ide_hwifs[index];
300                 init_hwif_data(hwif, index);
301                 init_hwif_default(hwif, index);
302 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
303                 hwif->irq = hwif->hw.irq =
304                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
305 #endif
306         }
307 #ifdef CONFIG_IDE_ARM
308         initializing = 1;
309         ide_arm_init();
310         initializing = 0;
311 #endif
312 }
313
314 /**
315  *      ide_system_bus_speed    -       guess bus speed
316  *
317  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
318  *      bus speed (in MHz). This is used for calculating interface PIO timings.
319  *      The default is 40 for known PCI systems, 50 otherwise.
320  *      The "idebus=xx" parameter can be used to override this value.
321  *      The actual value to be used is computed/displayed the first time
322  *      through. Drivers should only use this as a last resort.
323  *
324  *      Returns a guessed speed in MHz.
325  */
326
327 static int ide_system_bus_speed(void)
328 {
329 #ifdef CONFIG_PCI
330         static struct pci_device_id pci_default[] = {
331                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
332                 { }
333         };
334 #else
335 #define pci_default 0
336 #endif /* CONFIG_PCI */
337
338         if (!system_bus_speed) {
339                 if (idebus_parameter) {
340                         /* user supplied value */
341                         system_bus_speed = idebus_parameter;
342                 } else if (pci_dev_present(pci_default)) {
343                         /* safe default value for PCI */
344                         system_bus_speed = 33;
345                 } else {
346                         /* safe default value for VESA and PCI */
347                         system_bus_speed = 50;
348                 }
349                 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
350                         "for PIO modes%s\n", system_bus_speed,
351                         idebus_parameter ? "" : "; override with idebus=xx");
352         }
353         return system_bus_speed;
354 }
355
356 #ifdef CONFIG_PROC_FS
357 struct proc_dir_entry *proc_ide_root;
358 #endif
359
360 static struct resource* hwif_request_region(ide_hwif_t *hwif,
361                                             unsigned long addr, int num)
362 {
363         struct resource *res = request_region(addr, num, hwif->name);
364
365         if (!res)
366                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
367                                 hwif->name, addr, addr+num-1);
368         return res;
369 }
370
371 /**
372  *      ide_hwif_request_regions - request resources for IDE
373  *      @hwif: interface to use
374  *
375  *      Requests all the needed resources for an interface.
376  *      Right now core IDE code does this work which is deeply wrong.
377  *      MMIO leaves it to the controller driver,
378  *      PIO will migrate this way over time.
379  */
380
381 int ide_hwif_request_regions(ide_hwif_t *hwif)
382 {
383         unsigned long addr;
384         unsigned int i;
385
386         if (hwif->mmio == 2)
387                 return 0;
388         BUG_ON(hwif->mmio == 1);
389         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
390         if (addr && !hwif_request_region(hwif, addr, 1))
391                 goto control_region_busy;
392         hwif->straight8 = 0;
393         addr = hwif->io_ports[IDE_DATA_OFFSET];
394         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
395                 if (!hwif_request_region(hwif, addr, 8))
396                         goto data_region_busy;
397                 hwif->straight8 = 1;
398                 return 0;
399         }
400         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
401                 addr = hwif->io_ports[i];
402                 if (!hwif_request_region(hwif, addr, 1)) {
403                         while (--i)
404                                 release_region(addr, 1);
405                         goto data_region_busy;
406                 }
407         }
408         return 0;
409
410 data_region_busy:
411         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
412         if (addr)
413                 release_region(addr, 1);
414 control_region_busy:
415         /* If any errors are return, we drop the hwif interface. */
416         return -EBUSY;
417 }
418
419 /**
420  *      ide_hwif_release_regions - free IDE resources
421  *
422  *      Note that we only release the standard ports,
423  *      and do not even try to handle any extra ports
424  *      allocated for weird IDE interface chipsets.
425  *
426  *      Note also that we don't yet handle mmio resources here. More
427  *      importantly our caller should be doing this so we need to 
428  *      restructure this as a helper function for drivers.
429  */
430
431 void ide_hwif_release_regions(ide_hwif_t *hwif)
432 {
433         u32 i = 0;
434
435         if (hwif->mmio == 2)
436                 return;
437         if (hwif->io_ports[IDE_CONTROL_OFFSET])
438                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
439         if (hwif->straight8) {
440                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
441                 return;
442         }
443         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
444                 if (hwif->io_ports[i])
445                         release_region(hwif->io_ports[i], 1);
446 }
447
448 /**
449  *      ide_hwif_restore        -       restore hwif to template
450  *      @hwif: hwif to update
451  *      @tmp_hwif: template
452  *
453  *      Restore hwif to a previous state by copying most settngs
454  *      from the template.
455  */
456
457 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
458 {
459         hwif->hwgroup                   = tmp_hwif->hwgroup;
460
461         hwif->gendev.parent             = tmp_hwif->gendev.parent;
462
463         hwif->proc                      = tmp_hwif->proc;
464
465         hwif->major                     = tmp_hwif->major;
466         hwif->straight8                 = tmp_hwif->straight8;
467         hwif->bus_state                 = tmp_hwif->bus_state;
468
469         hwif->atapi_dma                 = tmp_hwif->atapi_dma;
470         hwif->ultra_mask                = tmp_hwif->ultra_mask;
471         hwif->mwdma_mask                = tmp_hwif->mwdma_mask;
472         hwif->swdma_mask                = tmp_hwif->swdma_mask;
473
474         hwif->chipset                   = tmp_hwif->chipset;
475         hwif->hold                      = tmp_hwif->hold;
476
477 #ifdef CONFIG_BLK_DEV_IDEPCI
478         hwif->pci_dev                   = tmp_hwif->pci_dev;
479         hwif->cds                       = tmp_hwif->cds;
480 #endif
481
482         hwif->tuneproc                  = tmp_hwif->tuneproc;
483         hwif->speedproc                 = tmp_hwif->speedproc;
484         hwif->selectproc                = tmp_hwif->selectproc;
485         hwif->reset_poll                = tmp_hwif->reset_poll;
486         hwif->pre_reset                 = tmp_hwif->pre_reset;
487         hwif->resetproc                 = tmp_hwif->resetproc;
488         hwif->intrproc                  = tmp_hwif->intrproc;
489         hwif->maskproc                  = tmp_hwif->maskproc;
490         hwif->quirkproc                 = tmp_hwif->quirkproc;
491         hwif->busproc                   = tmp_hwif->busproc;
492
493         hwif->ata_input_data            = tmp_hwif->ata_input_data;
494         hwif->ata_output_data           = tmp_hwif->ata_output_data;
495         hwif->atapi_input_bytes         = tmp_hwif->atapi_input_bytes;
496         hwif->atapi_output_bytes        = tmp_hwif->atapi_output_bytes;
497
498         hwif->dma_setup                 = tmp_hwif->dma_setup;
499         hwif->dma_exec_cmd              = tmp_hwif->dma_exec_cmd;
500         hwif->dma_start                 = tmp_hwif->dma_start;
501         hwif->ide_dma_end               = tmp_hwif->ide_dma_end;
502         hwif->ide_dma_check             = tmp_hwif->ide_dma_check;
503         hwif->ide_dma_on                = tmp_hwif->ide_dma_on;
504         hwif->ide_dma_off_quietly       = tmp_hwif->ide_dma_off_quietly;
505         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
506         hwif->ide_dma_host_on           = tmp_hwif->ide_dma_host_on;
507         hwif->ide_dma_host_off          = tmp_hwif->ide_dma_host_off;
508         hwif->ide_dma_lostirq           = tmp_hwif->ide_dma_lostirq;
509         hwif->ide_dma_timeout           = tmp_hwif->ide_dma_timeout;
510
511         hwif->OUTB                      = tmp_hwif->OUTB;
512         hwif->OUTBSYNC                  = tmp_hwif->OUTBSYNC;
513         hwif->OUTW                      = tmp_hwif->OUTW;
514         hwif->OUTL                      = tmp_hwif->OUTL;
515         hwif->OUTSW                     = tmp_hwif->OUTSW;
516         hwif->OUTSL                     = tmp_hwif->OUTSL;
517
518         hwif->INB                       = tmp_hwif->INB;
519         hwif->INW                       = tmp_hwif->INW;
520         hwif->INL                       = tmp_hwif->INL;
521         hwif->INSW                      = tmp_hwif->INSW;
522         hwif->INSL                      = tmp_hwif->INSL;
523
524         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
525
526         hwif->mmio                      = tmp_hwif->mmio;
527         hwif->rqsize                    = tmp_hwif->rqsize;
528         hwif->no_lba48                  = tmp_hwif->no_lba48;
529
530 #ifndef CONFIG_BLK_DEV_IDECS
531         hwif->irq                       = tmp_hwif->irq;
532 #endif
533
534         hwif->dma_base                  = tmp_hwif->dma_base;
535         hwif->dma_master                = tmp_hwif->dma_master;
536         hwif->dma_command               = tmp_hwif->dma_command;
537         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
538         hwif->dma_status                = tmp_hwif->dma_status;
539         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
540         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
541
542         hwif->dma_extra                 = tmp_hwif->dma_extra;
543         hwif->config_data               = tmp_hwif->config_data;
544         hwif->select_data               = tmp_hwif->select_data;
545         hwif->autodma                   = tmp_hwif->autodma;
546         hwif->udma_four                 = tmp_hwif->udma_four;
547         hwif->no_dsc                    = tmp_hwif->no_dsc;
548
549         hwif->hwif_data                 = tmp_hwif->hwif_data;
550 }
551
552 /**
553  *      ide_unregister          -       free an ide interface
554  *      @index: index of interface (will change soon to a pointer)
555  *
556  *      Perform the final unregister of an IDE interface. At the moment
557  *      we don't refcount interfaces so this will also get split up.
558  *
559  *      Locking:
560  *      The caller must not hold the IDE locks
561  *      The drive present/vanishing is not yet properly locked
562  *      Take care with the callbacks. These have been split to avoid
563  *      deadlocking the IDE layer. The shutdown callback is called
564  *      before we take the lock and free resources. It is up to the
565  *      caller to be sure there is no pending I/O here, and that
566  *      the interfce will not be reopened (present/vanishing locking
567  *      isnt yet done btw). After we commit to the final kill we
568  *      call the cleanup callback with the ide locks held.
569  *
570  *      Unregister restores the hwif structures to the default state.
571  *      This is raving bonkers.
572  */
573
574 void ide_unregister(unsigned int index)
575 {
576         ide_drive_t *drive;
577         ide_hwif_t *hwif, *g;
578         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
579         ide_hwgroup_t *hwgroup;
580         int irq_count = 0, unit;
581
582         BUG_ON(index >= MAX_HWIFS);
583
584         BUG_ON(in_interrupt());
585         BUG_ON(irqs_disabled());
586         down(&ide_cfg_sem);
587         spin_lock_irq(&ide_lock);
588         hwif = &ide_hwifs[index];
589         if (!hwif->present)
590                 goto abort;
591         for (unit = 0; unit < MAX_DRIVES; ++unit) {
592                 drive = &hwif->drives[unit];
593                 if (!drive->present)
594                         continue;
595                 spin_unlock_irq(&ide_lock);
596                 device_unregister(&drive->gendev);
597                 wait_for_completion(&drive->gendev_rel_comp);
598                 spin_lock_irq(&ide_lock);
599         }
600         hwif->present = 0;
601
602         spin_unlock_irq(&ide_lock);
603
604         destroy_proc_ide_interface(hwif);
605
606         hwgroup = hwif->hwgroup;
607         /*
608          * free the irq if we were the only hwif using it
609          */
610         g = hwgroup->hwif;
611         do {
612                 if (g->irq == hwif->irq)
613                         ++irq_count;
614                 g = g->next;
615         } while (g != hwgroup->hwif);
616         if (irq_count == 1)
617                 free_irq(hwif->irq, hwgroup);
618
619         spin_lock_irq(&ide_lock);
620         /*
621          * Note that we only release the standard ports,
622          * and do not even try to handle any extra ports
623          * allocated for weird IDE interface chipsets.
624          */
625         ide_hwif_release_regions(hwif);
626
627         /*
628          * Remove us from the hwgroup, and free
629          * the hwgroup if we were the only member
630          */
631         if (hwif->next == hwif) {
632                 BUG_ON(hwgroup->hwif != hwif);
633                 kfree(hwgroup);
634         } else {
635                 /* There is another interface in hwgroup.
636                  * Unlink us, and set hwgroup->drive and ->hwif to
637                  * something sane.
638                  */
639                 g = hwgroup->hwif;
640                 while (g->next != hwif)
641                         g = g->next;
642                 g->next = hwif->next;
643                 if (hwgroup->hwif == hwif) {
644                         /* Chose a random hwif for hwgroup->hwif.
645                          * It's guaranteed that there are no drives
646                          * left in the hwgroup.
647                          */
648                         BUG_ON(hwgroup->drive != NULL);
649                         hwgroup->hwif = g;
650                 }
651                 BUG_ON(hwgroup->hwif == hwif);
652         }
653
654         /* More messed up locking ... */
655         spin_unlock_irq(&ide_lock);
656         device_unregister(&hwif->gendev);
657         wait_for_completion(&hwif->gendev_rel_comp);
658
659         /*
660          * Remove us from the kernel's knowledge
661          */
662         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
663         kfree(hwif->sg_table);
664         unregister_blkdev(hwif->major, hwif->name);
665         spin_lock_irq(&ide_lock);
666
667         if (hwif->dma_base) {
668                 (void) ide_release_dma(hwif);
669
670                 hwif->dma_base = 0;
671                 hwif->dma_master = 0;
672                 hwif->dma_command = 0;
673                 hwif->dma_vendor1 = 0;
674                 hwif->dma_status = 0;
675                 hwif->dma_vendor3 = 0;
676                 hwif->dma_prdtable = 0;
677         }
678
679         /* copy original settings */
680         tmp_hwif = *hwif;
681
682         /* restore hwif data to pristine status */
683         init_hwif_data(hwif, index);
684         init_hwif_default(hwif, index);
685
686         ide_hwif_restore(hwif, &tmp_hwif);
687
688 abort:
689         spin_unlock_irq(&ide_lock);
690         up(&ide_cfg_sem);
691 }
692
693 EXPORT_SYMBOL(ide_unregister);
694
695
696 /**
697  *      ide_setup_ports         -       set up IDE interface ports
698  *      @hw: register descriptions
699  *      @base: base register
700  *      @offsets: table of register offsets
701  *      @ctrl: control register
702  *      @ack_irq: IRQ ack
703  *      @irq: interrupt lie
704  *
705  *      Setup hw_regs_t structure described by parameters.  You
706  *      may set up the hw structure yourself OR use this routine to
707  *      do it for you. This is basically a helper
708  *
709  */
710  
711 void ide_setup_ports (  hw_regs_t *hw,
712                         unsigned long base, int *offsets,
713                         unsigned long ctrl, unsigned long intr,
714                         ide_ack_intr_t *ack_intr,
715 /*
716  *                      ide_io_ops_t *iops,
717  */
718                         int irq)
719 {
720         int i;
721
722         memset(hw, 0, sizeof(hw_regs_t));
723         for (i = 0; i < IDE_NR_PORTS; i++) {
724                 if (offsets[i] == -1) {
725                         switch(i) {
726                                 case IDE_CONTROL_OFFSET:
727                                         hw->io_ports[i] = ctrl;
728                                         break;
729 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
730                                 case IDE_IRQ_OFFSET:
731                                         hw->io_ports[i] = intr;
732                                         break;
733 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
734                                 default:
735                                         hw->io_ports[i] = 0;
736                                         break;
737                         }
738                 } else {
739                         hw->io_ports[i] = base + offsets[i];
740                 }
741         }
742         hw->irq = irq;
743         hw->dma = NO_DMA;
744         hw->ack_intr = ack_intr;
745 /*
746  *      hw->iops = iops;
747  */
748 }
749
750 /**
751  *      ide_register_hw_with_fixup      -       register IDE interface
752  *      @hw: hardware registers
753  *      @hwifp: pointer to returned hwif
754  *      @fixup: fixup function
755  *
756  *      Register an IDE interface, specifying exactly the registers etc.
757  *      Set init=1 iff calling before probes have taken place.
758  *
759  *      Returns -1 on error.
760  */
761
762 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
763 {
764         int index, retry = 1;
765         ide_hwif_t *hwif;
766
767         do {
768                 for (index = 0; index < MAX_HWIFS; ++index) {
769                         hwif = &ide_hwifs[index];
770                         if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
771                                 goto found;
772                 }
773                 for (index = 0; index < MAX_HWIFS; ++index) {
774                         hwif = &ide_hwifs[index];
775                         if (hwif->hold)
776                                 continue;
777                         if ((!hwif->present && !hwif->mate && !initializing) ||
778                             (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
779                                 goto found;
780                 }
781                 for (index = 0; index < MAX_HWIFS; index++)
782                         ide_unregister(index);
783         } while (retry--);
784         return -1;
785 found:
786         if (hwif->present)
787                 ide_unregister(index);
788         else if (!hwif->hold) {
789                 init_hwif_data(hwif, index);
790                 init_hwif_default(hwif, index);
791         }
792         if (hwif->present)
793                 return -1;
794         memcpy(&hwif->hw, hw, sizeof(*hw));
795         memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
796         hwif->irq = hw->irq;
797         hwif->noprobe = 0;
798         hwif->chipset = hw->chipset;
799         hwif->gendev.parent = hw->dev;
800
801         if (!initializing) {
802                 probe_hwif_init_with_fixup(hwif, fixup);
803                 create_proc_ide_interfaces();
804         }
805
806         if (hwifp)
807                 *hwifp = hwif;
808
809         return (initializing || hwif->present) ? index : -1;
810 }
811
812 EXPORT_SYMBOL(ide_register_hw_with_fixup);
813
814 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
815 {
816         return ide_register_hw_with_fixup(hw, hwifp, NULL);
817 }
818
819 EXPORT_SYMBOL(ide_register_hw);
820
821 /*
822  *      Locks for IDE setting functionality
823  */
824
825 DECLARE_MUTEX(ide_setting_sem);
826
827 /**
828  *      __ide_add_setting       -       add an ide setting option
829  *      @drive: drive to use
830  *      @name: setting name
831  *      @rw: true if the function is read write
832  *      @read_ioctl: function to call on read
833  *      @write_ioctl: function to call on write
834  *      @data_type: type of data
835  *      @min: range minimum
836  *      @max: range maximum
837  *      @mul_factor: multiplication scale
838  *      @div_factor: divison scale
839  *      @data: private data field
840  *      @set: setting
841  *      @auto_remove: setting auto removal flag
842  *
843  *      Removes the setting named from the device if it is present.
844  *      The function takes the settings_lock to protect against 
845  *      parallel changes. This function must not be called from IRQ
846  *      context. Returns 0 on success or -1 on failure.
847  *
848  *      BUGS: This code is seriously over-engineered. There is also
849  *      magic about how the driver specific features are setup. If
850  *      a driver is attached we assume the driver settings are auto
851  *      remove.
852  */
853
854 static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove)
855 {
856         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
857
858         down(&ide_setting_sem);
859         while ((*p) && strcmp((*p)->name, name) < 0)
860                 p = &((*p)->next);
861         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
862                 goto abort;
863         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
864                 goto abort;
865         strcpy(setting->name, name);
866         setting->rw = rw;
867         setting->read_ioctl = read_ioctl;
868         setting->write_ioctl = write_ioctl;
869         setting->data_type = data_type;
870         setting->min = min;
871         setting->max = max;
872         setting->mul_factor = mul_factor;
873         setting->div_factor = div_factor;
874         setting->data = data;
875         setting->set = set;
876         
877         setting->next = *p;
878         if (auto_remove)
879                 setting->auto_remove = 1;
880         *p = setting;
881         up(&ide_setting_sem);
882         return 0;
883 abort:
884         up(&ide_setting_sem);
885         kfree(setting);
886         return -1;
887 }
888
889 int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set)
890 {
891         return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
892 }
893
894 EXPORT_SYMBOL(ide_add_setting);
895
896 /**
897  *      __ide_remove_setting    -       remove an ide setting option
898  *      @drive: drive to use
899  *      @name: setting name
900  *
901  *      Removes the setting named from the device if it is present.
902  *      The caller must hold the setting semaphore.
903  */
904  
905 static void __ide_remove_setting (ide_drive_t *drive, char *name)
906 {
907         ide_settings_t **p, *setting;
908
909         p = (ide_settings_t **) &drive->settings;
910
911         while ((*p) && strcmp((*p)->name, name))
912                 p = &((*p)->next);
913         if ((setting = (*p)) == NULL)
914                 return;
915
916         (*p) = setting->next;
917         
918         kfree(setting->name);
919         kfree(setting);
920 }
921
922 /**
923  *      ide_find_setting_by_ioctl       -       find a drive specific ioctl
924  *      @drive: drive to scan
925  *      @cmd: ioctl command to handle
926  *
927  *      Scan's the device setting table for a matching entry and returns
928  *      this or NULL if no entry is found. The caller must hold the
929  *      setting semaphore
930  */
931  
932 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
933 {
934         ide_settings_t *setting = drive->settings;
935
936         while (setting) {
937                 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
938                         break;
939                 setting = setting->next;
940         }
941         
942         return setting;
943 }
944
945 /**
946  *      ide_find_setting_by_name        -       find a drive specific setting
947  *      @drive: drive to scan
948  *      @name: setting name
949  *
950  *      Scan's the device setting table for a matching entry and returns
951  *      this or NULL if no entry is found. The caller must hold the
952  *      setting semaphore
953  */
954  
955 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
956 {
957         ide_settings_t *setting = drive->settings;
958
959         while (setting) {
960                 if (strcmp(setting->name, name) == 0)
961                         break;
962                 setting = setting->next;
963         }
964         return setting;
965 }
966
967 /**
968  *      auto_remove_settings    -       remove driver specific settings
969  *      @drive: drive
970  *
971  *      Automatically remove all the driver specific settings for this
972  *      drive. This function may sleep and must not be called from IRQ
973  *      context. The caller must hold ide_setting_sem.
974  */
975  
976 static void auto_remove_settings (ide_drive_t *drive)
977 {
978         ide_settings_t *setting;
979 repeat:
980         setting = drive->settings;
981         while (setting) {
982                 if (setting->auto_remove) {
983                         __ide_remove_setting(drive, setting->name);
984                         goto repeat;
985                 }
986                 setting = setting->next;
987         }
988 }
989
990 /**
991  *      ide_read_setting        -       read an IDE setting
992  *      @drive: drive to read from
993  *      @setting: drive setting
994  *
995  *      Read a drive setting and return the value. The caller
996  *      must hold the ide_setting_sem when making this call.
997  *
998  *      BUGS: the data return and error are the same return value
999  *      so an error -EINVAL and true return of the same value cannot
1000  *      be told apart
1001  */
1002  
1003 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1004 {
1005         int             val = -EINVAL;
1006         unsigned long   flags;
1007
1008         if ((setting->rw & SETTING_READ)) {
1009                 spin_lock_irqsave(&ide_lock, flags);
1010                 switch(setting->data_type) {
1011                         case TYPE_BYTE:
1012                                 val = *((u8 *) setting->data);
1013                                 break;
1014                         case TYPE_SHORT:
1015                                 val = *((u16 *) setting->data);
1016                                 break;
1017                         case TYPE_INT:
1018                         case TYPE_INTA:
1019                                 val = *((u32 *) setting->data);
1020                                 break;
1021                 }
1022                 spin_unlock_irqrestore(&ide_lock, flags);
1023         }
1024         return val;
1025 }
1026
1027 /**
1028  *      ide_spin_wait_hwgroup   -       wait for group
1029  *      @drive: drive in the group
1030  *
1031  *      Wait for an IDE device group to go non busy and then return
1032  *      holding the ide_lock which guards the hwgroup->busy status
1033  *      and right to use it.
1034  */
1035
1036 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1037 {
1038         ide_hwgroup_t *hwgroup = HWGROUP(drive);
1039         unsigned long timeout = jiffies + (3 * HZ);
1040
1041         spin_lock_irq(&ide_lock);
1042
1043         while (hwgroup->busy) {
1044                 unsigned long lflags;
1045                 spin_unlock_irq(&ide_lock);
1046                 local_irq_set(lflags);
1047                 if (time_after(jiffies, timeout)) {
1048                         local_irq_restore(lflags);
1049                         printk(KERN_ERR "%s: channel busy\n", drive->name);
1050                         return -EBUSY;
1051                 }
1052                 local_irq_restore(lflags);
1053                 spin_lock_irq(&ide_lock);
1054         }
1055         return 0;
1056 }
1057
1058 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1059
1060 /**
1061  *      ide_write_setting       -       read an IDE setting
1062  *      @drive: drive to read from
1063  *      @setting: drive setting
1064  *      @val: value
1065  *
1066  *      Write a drive setting if it is possible. The caller
1067  *      must hold the ide_setting_sem when making this call.
1068  *
1069  *      BUGS: the data return and error are the same return value
1070  *      so an error -EINVAL and true return of the same value cannot
1071  *      be told apart
1072  *
1073  *      FIXME:  This should be changed to enqueue a special request
1074  *      to the driver to change settings, and then wait on a sema for completion.
1075  *      The current scheme of polling is kludgy, though safe enough.
1076  */
1077
1078 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1079 {
1080         int i;
1081         u32 *p;
1082
1083         if (!capable(CAP_SYS_ADMIN))
1084                 return -EACCES;
1085         if (!(setting->rw & SETTING_WRITE))
1086                 return -EPERM;
1087         if (val < setting->min || val > setting->max)
1088                 return -EINVAL;
1089         if (setting->set)
1090                 return setting->set(drive, val);
1091         if (ide_spin_wait_hwgroup(drive))
1092                 return -EBUSY;
1093         switch (setting->data_type) {
1094                 case TYPE_BYTE:
1095                         *((u8 *) setting->data) = val;
1096                         break;
1097                 case TYPE_SHORT:
1098                         *((u16 *) setting->data) = val;
1099                         break;
1100                 case TYPE_INT:
1101                         *((u32 *) setting->data) = val;
1102                         break;
1103                 case TYPE_INTA:
1104                         p = (u32 *) setting->data;
1105                         for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1106                                 *p = val;
1107                         break;
1108         }
1109         spin_unlock_irq(&ide_lock);
1110         return 0;
1111 }
1112
1113 static int set_io_32bit(ide_drive_t *drive, int arg)
1114 {
1115         drive->io_32bit = arg;
1116 #ifdef CONFIG_BLK_DEV_DTC2278
1117         if (HWIF(drive)->chipset == ide_dtc2278)
1118                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1119 #endif /* CONFIG_BLK_DEV_DTC2278 */
1120         return 0;
1121 }
1122
1123 static int set_using_dma (ide_drive_t *drive, int arg)
1124 {
1125 #ifdef CONFIG_BLK_DEV_IDEDMA
1126         if (!drive->id || !(drive->id->capability & 1))
1127                 return -EPERM;
1128         if (HWIF(drive)->ide_dma_check == NULL)
1129                 return -EPERM;
1130         if (arg) {
1131                 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1132                 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1133         } else {
1134                 if (__ide_dma_off(drive))
1135                         return -EIO;
1136         }
1137         return 0;
1138 #else
1139         return -EPERM;
1140 #endif
1141 }
1142
1143 static int set_pio_mode (ide_drive_t *drive, int arg)
1144 {
1145         struct request rq;
1146
1147         if (!HWIF(drive)->tuneproc)
1148                 return -ENOSYS;
1149         if (drive->special.b.set_tune)
1150                 return -EBUSY;
1151         ide_init_drive_cmd(&rq);
1152         drive->tune_req = (u8) arg;
1153         drive->special.b.set_tune = 1;
1154         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1155         return 0;
1156 }
1157
1158 static int set_xfer_rate (ide_drive_t *drive, int arg)
1159 {
1160         int err = ide_wait_cmd(drive,
1161                         WIN_SETFEATURES, (u8) arg,
1162                         SETFEATURES_XFER, 0, NULL);
1163
1164         if (!err && arg) {
1165                 ide_set_xfer_rate(drive, (u8) arg);
1166                 ide_driveid_update(drive);
1167         }
1168         return err;
1169 }
1170
1171 /**
1172  *      ide_add_generic_settings        -       generic ide settings
1173  *      @drive: drive being configured
1174  *
1175  *      Add the generic parts of the system settings to the /proc files and
1176  *      ioctls for this IDE device. The caller must not be holding the
1177  *      ide_setting_sem.
1178  */
1179
1180 void ide_add_generic_settings (ide_drive_t *drive)
1181 {
1182 /*
1183  *                        drive         setting name            read/write access                               read ioctl              write ioctl             data type       min     max                             mul_factor      div_factor      data pointer                    set function
1184  */
1185         __ide_add_setting(drive,        "io_32bit",             drive->no_io_32bit ? SETTING_READ : SETTING_RW, HDIO_GET_32BIT,         HDIO_SET_32BIT,         TYPE_BYTE,      0,      1 + (SUPPORT_VLB_SYNC << 1),    1,              1,              &drive->io_32bit,               set_io_32bit,   0);
1186         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     HDIO_GET_KEEPSETTINGS,  HDIO_SET_KEEPSETTINGS,  TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
1187         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
1188         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  -1,                     HDIO_SET_PIO_MODE,      TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
1189         __ide_add_setting(drive,        "unmaskirq",            drive->no_unmask ? SETTING_READ : SETTING_RW,   HDIO_GET_UNMASKINTR,    HDIO_SET_UNMASKINTR,    TYPE_BYTE,      0,      1,                              1,              1,              &drive->unmask,                 NULL,           0);
1190         __ide_add_setting(drive,        "using_dma",            SETTING_RW,                                     HDIO_GET_DMA,           HDIO_SET_DMA,           TYPE_BYTE,      0,      1,                              1,              1,              &drive->using_dma,              set_using_dma,  0);
1191         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
1192         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
1193         __ide_add_setting(drive,        "number",               SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
1194 }
1195
1196 /**
1197  *      system_bus_clock        -       clock guess
1198  *
1199  *      External version of the bus clock guess used by very old IDE drivers
1200  *      for things like VLB timings. Should not be used.
1201  */
1202
1203 int system_bus_clock (void)
1204 {
1205         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1206 }
1207
1208 EXPORT_SYMBOL(system_bus_clock);
1209
1210 static int generic_ide_suspend(struct device *dev, pm_message_t state)
1211 {
1212         ide_drive_t *drive = dev->driver_data;
1213         struct request rq;
1214         struct request_pm_state rqpm;
1215         ide_task_t args;
1216
1217         memset(&rq, 0, sizeof(rq));
1218         memset(&rqpm, 0, sizeof(rqpm));
1219         memset(&args, 0, sizeof(args));
1220         rq.flags = REQ_PM_SUSPEND;
1221         rq.special = &args;
1222         rq.end_io_data = &rqpm;
1223         rqpm.pm_step = ide_pm_state_start_suspend;
1224         rqpm.pm_state = state.event;
1225
1226         return ide_do_drive_cmd(drive, &rq, ide_wait);
1227 }
1228
1229 static int generic_ide_resume(struct device *dev)
1230 {
1231         ide_drive_t *drive = dev->driver_data;
1232         struct request rq;
1233         struct request_pm_state rqpm;
1234         ide_task_t args;
1235
1236         memset(&rq, 0, sizeof(rq));
1237         memset(&rqpm, 0, sizeof(rqpm));
1238         memset(&args, 0, sizeof(args));
1239         rq.flags = REQ_PM_RESUME;
1240         rq.special = &args;
1241         rq.end_io_data = &rqpm;
1242         rqpm.pm_step = ide_pm_state_start_resume;
1243         rqpm.pm_state = PM_EVENT_ON;
1244
1245         return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1246 }
1247
1248 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1249                         unsigned int cmd, unsigned long arg)
1250 {
1251         ide_settings_t *setting;
1252         ide_driver_t *drv;
1253         int err = 0;
1254         void __user *p = (void __user *)arg;
1255
1256         down(&ide_setting_sem);
1257         if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1258                 if (cmd == setting->read_ioctl) {
1259                         err = ide_read_setting(drive, setting);
1260                         up(&ide_setting_sem);
1261                         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1262                 } else {
1263                         if (bdev != bdev->bd_contains)
1264                                 err = -EINVAL;
1265                         else
1266                                 err = ide_write_setting(drive, setting, arg);
1267                         up(&ide_setting_sem);
1268                         return err;
1269                 }
1270         }
1271         up(&ide_setting_sem);
1272
1273         switch (cmd) {
1274                 case HDIO_OBSOLETE_IDENTITY:
1275                 case HDIO_GET_IDENTITY:
1276                         if (bdev != bdev->bd_contains)
1277                                 return -EINVAL;
1278                         if (drive->id_read == 0)
1279                                 return -ENOMSG;
1280                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1281                                 return -EFAULT;
1282                         return 0;
1283
1284                 case HDIO_GET_NICE:
1285                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1286                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1287                                         drive->nice0            <<      IDE_NICE_0              |
1288                                         drive->nice1            <<      IDE_NICE_1              |
1289                                         drive->nice2            <<      IDE_NICE_2,
1290                                         (long __user *) arg);
1291
1292 #ifdef CONFIG_IDE_TASK_IOCTL
1293                 case HDIO_DRIVE_TASKFILE:
1294                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1295                                 return -EACCES;
1296                         switch(drive->media) {
1297                                 case ide_disk:
1298                                         return ide_taskfile_ioctl(drive, cmd, arg);
1299                                 default:
1300                                         return -ENOMSG;
1301                         }
1302 #endif /* CONFIG_IDE_TASK_IOCTL */
1303
1304                 case HDIO_DRIVE_CMD:
1305                         if (!capable(CAP_SYS_RAWIO))
1306                                 return -EACCES;
1307                         return ide_cmd_ioctl(drive, cmd, arg);
1308
1309                 case HDIO_DRIVE_TASK:
1310                         if (!capable(CAP_SYS_RAWIO))
1311                                 return -EACCES;
1312                         return ide_task_ioctl(drive, cmd, arg);
1313
1314                 case HDIO_SCAN_HWIF:
1315                 {
1316                         hw_regs_t hw;
1317                         int args[3];
1318                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1319                         if (copy_from_user(args, p, 3 * sizeof(int)))
1320                                 return -EFAULT;
1321                         memset(&hw, 0, sizeof(hw));
1322                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1323                                             (unsigned long) args[1], NULL);
1324                         hw.irq = args[2];
1325                         if (ide_register_hw(&hw, NULL) == -1)
1326                                 return -EIO;
1327                         return 0;
1328                 }
1329                 case HDIO_UNREGISTER_HWIF:
1330                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1331                         /* (arg > MAX_HWIFS) checked in function */
1332                         ide_unregister(arg);
1333                         return 0;
1334                 case HDIO_SET_NICE:
1335                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1336                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1337                                 return -EPERM;
1338                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1339                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1340                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1341                                 drive->dsc_overlap = 0;
1342                                 return -EPERM;
1343                         }
1344                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1345                         return 0;
1346                 case HDIO_DRIVE_RESET:
1347                 {
1348                         unsigned long flags;
1349                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1350                         
1351                         /*
1352                          *      Abort the current command on the
1353                          *      group if there is one, taking
1354                          *      care not to allow anything else
1355                          *      to be queued and to die on the
1356                          *      spot if we miss one somehow
1357                          */
1358
1359                         spin_lock_irqsave(&ide_lock, flags);
1360
1361                         ide_abort(drive, "drive reset");
1362
1363                         BUG_ON(HWGROUP(drive)->handler);
1364                                 
1365                         /* Ensure nothing gets queued after we
1366                            drop the lock. Reset will clear the busy */
1367                    
1368                         HWGROUP(drive)->busy = 1;
1369                         spin_unlock_irqrestore(&ide_lock, flags);
1370                         (void) ide_do_reset(drive);
1371
1372                         return 0;
1373                 }
1374
1375                 case CDROMEJECT:
1376                 case CDROMCLOSETRAY:
1377                         return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1378
1379                 case HDIO_GET_BUSSTATE:
1380                         if (!capable(CAP_SYS_ADMIN))
1381                                 return -EACCES;
1382                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1383                                 return -EFAULT;
1384                         return 0;
1385
1386                 case HDIO_SET_BUSSTATE:
1387                         if (!capable(CAP_SYS_ADMIN))
1388                                 return -EACCES;
1389                         if (HWIF(drive)->busproc)
1390                                 return HWIF(drive)->busproc(drive, (int)arg);
1391                         return -EOPNOTSUPP;
1392                 default:
1393                         return -EINVAL;
1394         }
1395 }
1396
1397 EXPORT_SYMBOL(generic_ide_ioctl);
1398
1399 /*
1400  * stridx() returns the offset of c within s,
1401  * or -1 if c is '\0' or not found within s.
1402  */
1403 static int __init stridx (const char *s, char c)
1404 {
1405         char *i = strchr(s, c);
1406         return (i && c) ? i - s : -1;
1407 }
1408
1409 /*
1410  * match_parm() does parsing for ide_setup():
1411  *
1412  * 1. the first char of s must be '='.
1413  * 2. if the remainder matches one of the supplied keywords,
1414  *     the index (1 based) of the keyword is negated and returned.
1415  * 3. if the remainder is a series of no more than max_vals numbers
1416  *     separated by commas, the numbers are saved in vals[] and a
1417  *     count of how many were saved is returned.  Base10 is assumed,
1418  *     and base16 is allowed when prefixed with "0x".
1419  * 4. otherwise, zero is returned.
1420  */
1421 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1422 {
1423         static const char *decimal = "0123456789";
1424         static const char *hex = "0123456789abcdef";
1425         int i, n;
1426
1427         if (*s++ == '=') {
1428                 /*
1429                  * Try matching against the supplied keywords,
1430                  * and return -(index+1) if we match one
1431                  */
1432                 if (keywords != NULL) {
1433                         for (i = 0; *keywords != NULL; ++i) {
1434                                 if (!strcmp(s, *keywords++))
1435                                         return -(i+1);
1436                         }
1437                 }
1438                 /*
1439                  * Look for a series of no more than "max_vals"
1440                  * numeric values separated by commas, in base10,
1441                  * or base16 when prefixed with "0x".
1442                  * Return a count of how many were found.
1443                  */
1444                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1445                         vals[n] = i;
1446                         while ((i = stridx(decimal, *++s)) >= 0)
1447                                 vals[n] = (vals[n] * 10) + i;
1448                         if (*s == 'x' && !vals[n]) {
1449                                 while ((i = stridx(hex, *++s)) >= 0)
1450                                         vals[n] = (vals[n] * 0x10) + i;
1451                         }
1452                         if (++n == max_vals)
1453                                 break;
1454                         if (*s == ',' || *s == ';')
1455                                 ++s;
1456                 }
1457                 if (!*s)
1458                         return n;
1459         }
1460         return 0;       /* zero = nothing matched */
1461 }
1462
1463 #ifdef CONFIG_BLK_DEV_ALI14XX
1464 static int __initdata probe_ali14xx;
1465 extern int ali14xx_init(void);
1466 #endif
1467 #ifdef CONFIG_BLK_DEV_UMC8672
1468 static int __initdata probe_umc8672;
1469 extern int umc8672_init(void);
1470 #endif
1471 #ifdef CONFIG_BLK_DEV_DTC2278
1472 static int __initdata probe_dtc2278;
1473 extern int dtc2278_init(void);
1474 #endif
1475 #ifdef CONFIG_BLK_DEV_HT6560B
1476 static int __initdata probe_ht6560b;
1477 extern int ht6560b_init(void);
1478 #endif
1479 #ifdef CONFIG_BLK_DEV_QD65XX
1480 static int __initdata probe_qd65xx;
1481 extern int qd65xx_init(void);
1482 #endif
1483
1484 static int __initdata is_chipset_set[MAX_HWIFS];
1485
1486 /*
1487  * ide_setup() gets called VERY EARLY during initialization,
1488  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1489  *
1490  * Remember to update Documentation/ide.txt if you change something here.
1491  */
1492 static int __init ide_setup(char *s)
1493 {
1494         int i, vals[3];
1495         ide_hwif_t *hwif;
1496         ide_drive_t *drive;
1497         unsigned int hw, unit;
1498         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1499         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1500
1501         
1502         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1503                 return 0;                               /* driver and not us */
1504
1505         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1506                 return 0;
1507
1508         printk(KERN_INFO "ide_setup: %s", s);
1509         init_ide_data ();
1510
1511 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1512         if (!strcmp(s, "ide=doubler")) {
1513                 extern int ide_doubler;
1514
1515                 printk(" : Enabled support for IDE doublers\n");
1516                 ide_doubler = 1;
1517                 return 1;
1518         }
1519 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1520
1521         if (!strcmp(s, "ide=nodma")) {
1522                 printk(" : Prevented DMA\n");
1523                 noautodma = 1;
1524                 return 1;
1525         }
1526
1527 #ifdef CONFIG_BLK_DEV_IDEPCI
1528         if (!strcmp(s, "ide=reverse")) {
1529                 ide_scan_direction = 1;
1530                 printk(" : Enabled support for IDE inverse scan order.\n");
1531                 return 1;
1532         }
1533 #endif /* CONFIG_BLK_DEV_IDEPCI */
1534
1535         /*
1536          * Look for drive options:  "hdx="
1537          */
1538         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1539                 const char *hd_words[] = {
1540                         "none", "noprobe", "nowerr", "cdrom", "serialize",
1541                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1542                         "noflush", "remap", "remap63", "scsi", NULL };
1543                 unit = s[2] - 'a';
1544                 hw   = unit / MAX_DRIVES;
1545                 unit = unit % MAX_DRIVES;
1546                 hwif = &ide_hwifs[hw];
1547                 drive = &hwif->drives[unit];
1548                 if (strncmp(s + 4, "ide-", 4) == 0) {
1549                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1550                         goto done;
1551                 }
1552                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1553                         case -1: /* "none" */
1554                         case -2: /* "noprobe" */
1555                                 drive->noprobe = 1;
1556                                 goto done;
1557                         case -3: /* "nowerr" */
1558                                 drive->bad_wstat = BAD_R_STAT;
1559                                 hwif->noprobe = 0;
1560                                 goto done;
1561                         case -4: /* "cdrom" */
1562                                 drive->present = 1;
1563                                 drive->media = ide_cdrom;
1564                                 /* an ATAPI device ignores DRDY */
1565                                 drive->ready_stat = 0;
1566                                 hwif->noprobe = 0;
1567                                 goto done;
1568                         case -5: /* "serialize" */
1569                                 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1570                                 goto do_serialize;
1571                         case -6: /* "autotune" */
1572                                 drive->autotune = IDE_TUNE_AUTO;
1573                                 goto obsolete_option;
1574                         case -7: /* "noautotune" */
1575                                 drive->autotune = IDE_TUNE_NOAUTO;
1576                                 goto obsolete_option;
1577                         case -9: /* "swapdata" */
1578                         case -10: /* "bswap" */
1579                                 drive->bswap = 1;
1580                                 goto done;
1581                         case -11: /* noflush */
1582                                 drive->noflush = 1;
1583                                 goto done;
1584                         case -12: /* "remap" */
1585                                 drive->remap_0_to_1 = 1;
1586                                 goto done;
1587                         case -13: /* "remap63" */
1588                                 drive->sect0 = 63;
1589                                 goto done;
1590                         case -14: /* "scsi" */
1591                                 drive->scsi = 1;
1592                                 goto done;
1593                         case 3: /* cyl,head,sect */
1594                                 drive->media    = ide_disk;
1595                                 drive->ready_stat = READY_STAT;
1596                                 drive->cyl      = drive->bios_cyl  = vals[0];
1597                                 drive->head     = drive->bios_head = vals[1];
1598                                 drive->sect     = drive->bios_sect = vals[2];
1599                                 drive->present  = 1;
1600                                 drive->forced_geom = 1;
1601                                 hwif->noprobe = 0;
1602                                 goto done;
1603                         default:
1604                                 goto bad_option;
1605                 }
1606         }
1607
1608         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1609                 goto bad_option;
1610         /*
1611          * Look for bus speed option:  "idebus="
1612          */
1613         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1614                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1615                         goto bad_option;
1616                 if (vals[0] >= 20 && vals[0] <= 66) {
1617                         idebus_parameter = vals[0];
1618                 } else
1619                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1620                 goto done;
1621         }
1622         /*
1623          * Look for interface options:  "idex="
1624          */
1625         if (s[3] >= '0' && s[3] <= max_hwif) {
1626                 /*
1627                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1628                  * (-8, -9, -10) are reserved to ease the hardcoding.
1629                  */
1630                 static const char *ide_words[] = {
1631                         "noprobe", "serialize", "autotune", "noautotune", 
1632                         "reset", "dma", "ata66", "minus8", "minus9",
1633                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1634                         "dtc2278", "umc8672", "ali14xx", NULL };
1635                 hw = s[3] - '0';
1636                 hwif = &ide_hwifs[hw];
1637                 i = match_parm(&s[4], ide_words, vals, 3);
1638
1639                 /*
1640                  * Cryptic check to ensure chipset not already set for hwif.
1641                  * Note: we can't depend on hwif->chipset here.
1642                  */
1643                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1644                         /* chipset already specified */
1645                         if (is_chipset_set[hw])
1646                                 goto bad_option;
1647                         if (i > -18 && i <= -11) {
1648                                 /* these drivers are for "ide0=" only */
1649                                 if (hw != 0)
1650                                         goto bad_hwif;
1651                                 /* chipset already specified for 2nd port */
1652                                 if (is_chipset_set[hw+1])
1653                                         goto bad_option;
1654                         }
1655                         is_chipset_set[hw] = 1;
1656                         printk("\n");
1657                 }
1658
1659                 switch (i) {
1660 #ifdef CONFIG_BLK_DEV_ALI14XX
1661                         case -17: /* "ali14xx" */
1662                                 probe_ali14xx = 1;
1663                                 goto done;
1664 #endif
1665 #ifdef CONFIG_BLK_DEV_UMC8672
1666                         case -16: /* "umc8672" */
1667                                 probe_umc8672 = 1;
1668                                 goto done;
1669 #endif
1670 #ifdef CONFIG_BLK_DEV_DTC2278
1671                         case -15: /* "dtc2278" */
1672                                 probe_dtc2278 = 1;
1673                                 goto done;
1674 #endif
1675 #ifdef CONFIG_BLK_DEV_CMD640
1676                         case -14: /* "cmd640_vlb" */
1677                         {
1678                                 extern int cmd640_vlb; /* flag for cmd640.c */
1679                                 cmd640_vlb = 1;
1680                                 goto done;
1681                         }
1682 #endif
1683 #ifdef CONFIG_BLK_DEV_HT6560B
1684                         case -13: /* "ht6560b" */
1685                                 probe_ht6560b = 1;
1686                                 goto done;
1687 #endif
1688 #ifdef CONFIG_BLK_DEV_QD65XX
1689                         case -12: /* "qd65xx" */
1690                                 probe_qd65xx = 1;
1691                                 goto done;
1692 #endif
1693 #ifdef CONFIG_BLK_DEV_4DRIVES
1694                         case -11: /* "four" drives on one set of ports */
1695                         {
1696                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1697                                 mate->drives[0].select.all ^= 0x20;
1698                                 mate->drives[1].select.all ^= 0x20;
1699                                 hwif->chipset = mate->chipset = ide_4drives;
1700                                 mate->irq = hwif->irq;
1701                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1702                                 goto do_serialize;
1703                         }
1704 #endif /* CONFIG_BLK_DEV_4DRIVES */
1705                         case -10: /* minus10 */
1706                         case -9: /* minus9 */
1707                         case -8: /* minus8 */
1708                                 goto bad_option;
1709                         case -7: /* ata66 */
1710 #ifdef CONFIG_BLK_DEV_IDEPCI
1711                                 hwif->udma_four = 1;
1712                                 goto obsolete_option;
1713 #else
1714                                 goto bad_hwif;
1715 #endif
1716                         case -6: /* dma */
1717                                 hwif->autodma = 1;
1718                                 goto obsolete_option;
1719                         case -5: /* "reset" */
1720                                 hwif->reset = 1;
1721                                 goto obsolete_option;
1722                         case -4: /* "noautotune" */
1723                                 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1724                                 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1725                                 goto obsolete_option;
1726                         case -3: /* "autotune" */
1727                                 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1728                                 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1729                                 goto obsolete_option;
1730                         case -2: /* "serialize" */
1731                         do_serialize:
1732                                 hwif->mate = &ide_hwifs[hw^1];
1733                                 hwif->mate->mate = hwif;
1734                                 hwif->serialized = hwif->mate->serialized = 1;
1735                                 goto obsolete_option;
1736
1737                         case -1: /* "noprobe" */
1738                                 hwif->noprobe = 1;
1739                                 goto done;
1740
1741                         case 1: /* base */
1742                                 vals[1] = vals[0] + 0x206; /* default ctl */
1743                         case 2: /* base,ctl */
1744                                 vals[2] = 0;    /* default irq = probe for it */
1745                         case 3: /* base,ctl,irq */
1746                                 hwif->hw.irq = vals[2];
1747                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1748                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1749                                 hwif->irq      = vals[2];
1750                                 hwif->noprobe  = 0;
1751                                 hwif->chipset  = ide_forced;
1752                                 goto obsolete_option;
1753
1754                         case 0: goto bad_option;
1755                         default:
1756                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1757                                 return 1;
1758                 }
1759         }
1760 bad_option:
1761         printk(" -- BAD OPTION\n");
1762         return 1;
1763 obsolete_option:
1764         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1765         return 1;
1766 bad_hwif:
1767         printk("-- NOT SUPPORTED ON ide%d", hw);
1768 done:
1769         printk("\n");
1770         return 1;
1771 }
1772
1773 extern void pnpide_init(void);
1774 extern void h8300_ide_init(void);
1775
1776 /*
1777  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1778  */
1779 static void __init probe_for_hwifs (void)
1780 {
1781 #ifdef CONFIG_BLK_DEV_IDEPCI
1782         ide_scan_pcibus(ide_scan_direction);
1783 #endif /* CONFIG_BLK_DEV_IDEPCI */
1784
1785 #ifdef CONFIG_ETRAX_IDE
1786         {
1787                 extern void init_e100_ide(void);
1788                 init_e100_ide();
1789         }
1790 #endif /* CONFIG_ETRAX_IDE */
1791 #ifdef CONFIG_BLK_DEV_CMD640
1792         {
1793                 extern void ide_probe_for_cmd640x(void);
1794                 ide_probe_for_cmd640x();
1795         }
1796 #endif /* CONFIG_BLK_DEV_CMD640 */
1797 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1798         {
1799                 extern void pmac_ide_probe(void);
1800                 pmac_ide_probe();
1801         }
1802 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1803 #ifdef CONFIG_BLK_DEV_GAYLE
1804         {
1805                 extern void gayle_init(void);
1806                 gayle_init();
1807         }
1808 #endif /* CONFIG_BLK_DEV_GAYLE */
1809 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1810         {
1811                 extern void falconide_init(void);
1812                 falconide_init();
1813         }
1814 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1815 #ifdef CONFIG_BLK_DEV_MAC_IDE
1816         {
1817                 extern void macide_init(void);
1818                 macide_init();
1819         }
1820 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1821 #ifdef CONFIG_BLK_DEV_Q40IDE
1822         {
1823                 extern void q40ide_init(void);
1824                 q40ide_init();
1825         }
1826 #endif /* CONFIG_BLK_DEV_Q40IDE */
1827 #ifdef CONFIG_BLK_DEV_BUDDHA
1828         {
1829                 extern void buddha_init(void);
1830                 buddha_init();
1831         }
1832 #endif /* CONFIG_BLK_DEV_BUDDHA */
1833 #ifdef CONFIG_BLK_DEV_IDEPNP
1834         pnpide_init();
1835 #endif
1836 #ifdef CONFIG_H8300
1837         h8300_ide_init();
1838 #endif
1839 }
1840
1841 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1842 {
1843 #ifdef CONFIG_PROC_FS
1844         ide_add_proc_entries(drive->proc, driver->proc, drive);
1845 #endif
1846 }
1847
1848 EXPORT_SYMBOL(ide_register_subdriver);
1849
1850 /**
1851  *      ide_unregister_subdriver        -       disconnect drive from driver
1852  *      @drive: drive to unplug
1853  *      @driver: driver
1854  *
1855  *      Disconnect a drive from the driver it was attached to and then
1856  *      clean up the various proc files and other objects attached to it.
1857  *
1858  *      Takes ide_setting_sem and ide_lock.
1859  *      Caller must hold none of the locks.
1860  */
1861
1862 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1863 {
1864         unsigned long flags;
1865         
1866         down(&ide_setting_sem);
1867         spin_lock_irqsave(&ide_lock, flags);
1868 #ifdef CONFIG_PROC_FS
1869         ide_remove_proc_entries(drive->proc, driver->proc);
1870 #endif
1871         auto_remove_settings(drive);
1872         spin_unlock_irqrestore(&ide_lock, flags);
1873         up(&ide_setting_sem);
1874 }
1875
1876 EXPORT_SYMBOL(ide_unregister_subdriver);
1877
1878 /*
1879  * Probe module
1880  */
1881
1882 EXPORT_SYMBOL(ide_lock);
1883
1884 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1885 {
1886         return 1;
1887 }
1888
1889 static char *media_string(ide_drive_t *drive)
1890 {
1891         switch (drive->media) {
1892         case ide_disk:
1893                 return "disk";
1894         case ide_cdrom:
1895                 return "cdrom";
1896         case ide_tape:
1897                 return "tape";
1898         case ide_floppy:
1899                 return "floppy";
1900         default:
1901                 return "UNKNOWN";
1902         }
1903 }
1904
1905 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1906 {
1907         ide_drive_t *drive = to_ide_device(dev);
1908         return sprintf(buf, "%s\n", media_string(drive));
1909 }
1910
1911 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1912 {
1913         ide_drive_t *drive = to_ide_device(dev);
1914         return sprintf(buf, "%s\n", drive->name);
1915 }
1916
1917 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1918 {
1919         ide_drive_t *drive = to_ide_device(dev);
1920         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1921 }
1922
1923 static struct device_attribute ide_dev_attrs[] = {
1924         __ATTR_RO(media),
1925         __ATTR_RO(drivename),
1926         __ATTR_RO(modalias),
1927         __ATTR_NULL
1928 };
1929
1930 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1931                       char *buffer, int buffer_size)
1932 {
1933         ide_drive_t *drive = to_ide_device(dev);
1934         int i = 0;
1935         int length = 0;
1936
1937         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1938                        "MEDIA=%s", media_string(drive));
1939         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1940                        "DRIVENAME=%s", drive->name);
1941         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1942                        "MODALIAS=ide:m-%s", media_string(drive));
1943         envp[i] = NULL;
1944         return 0;
1945 }
1946
1947 static int generic_ide_probe(struct device *dev)
1948 {
1949         ide_drive_t *drive = to_ide_device(dev);
1950         ide_driver_t *drv = to_ide_driver(dev->driver);
1951
1952         return drv->probe ? drv->probe(drive) : -ENODEV;
1953 }
1954
1955 static int generic_ide_remove(struct device *dev)
1956 {
1957         ide_drive_t *drive = to_ide_device(dev);
1958         ide_driver_t *drv = to_ide_driver(dev->driver);
1959
1960         if (drv->remove)
1961                 drv->remove(drive);
1962
1963         return 0;
1964 }
1965
1966 static void generic_ide_shutdown(struct device *dev)
1967 {
1968         ide_drive_t *drive = to_ide_device(dev);
1969         ide_driver_t *drv = to_ide_driver(dev->driver);
1970
1971         if (dev->driver && drv->shutdown)
1972                 drv->shutdown(drive);
1973 }
1974
1975 struct bus_type ide_bus_type = {
1976         .name           = "ide",
1977         .match          = ide_bus_match,
1978         .uevent         = ide_uevent,
1979         .probe          = generic_ide_probe,
1980         .remove         = generic_ide_remove,
1981         .shutdown       = generic_ide_shutdown,
1982         .dev_attrs      = ide_dev_attrs,
1983         .suspend        = generic_ide_suspend,
1984         .resume         = generic_ide_resume,
1985 };
1986
1987 EXPORT_SYMBOL_GPL(ide_bus_type);
1988
1989 /*
1990  * This is gets invoked once during initialization, to set *everything* up
1991  */
1992 static int __init ide_init(void)
1993 {
1994         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1995         system_bus_speed = ide_system_bus_speed();
1996
1997         bus_register(&ide_bus_type);
1998
1999         init_ide_data();
2000
2001 #ifdef CONFIG_PROC_FS
2002         proc_ide_root = proc_mkdir("ide", NULL);
2003 #endif
2004
2005 #ifdef CONFIG_BLK_DEV_ALI14XX
2006         if (probe_ali14xx)
2007                 (void)ali14xx_init();
2008 #endif
2009 #ifdef CONFIG_BLK_DEV_UMC8672
2010         if (probe_umc8672)
2011                 (void)umc8672_init();
2012 #endif
2013 #ifdef CONFIG_BLK_DEV_DTC2278
2014         if (probe_dtc2278)
2015                 (void)dtc2278_init();
2016 #endif
2017 #ifdef CONFIG_BLK_DEV_HT6560B
2018         if (probe_ht6560b)
2019                 (void)ht6560b_init();
2020 #endif
2021 #ifdef CONFIG_BLK_DEV_QD65XX
2022         if (probe_qd65xx)
2023                 (void)qd65xx_init();
2024 #endif
2025
2026         initializing = 1;
2027         /* Probe for special PCI and other "known" interface chipsets. */
2028         probe_for_hwifs();
2029         initializing = 0;
2030
2031 #ifdef CONFIG_PROC_FS
2032         proc_ide_create();
2033 #endif
2034         return 0;
2035 }
2036
2037 #ifdef MODULE
2038 static char *options = NULL;
2039 module_param(options, charp, 0);
2040 MODULE_LICENSE("GPL");
2041
2042 static void __init parse_options (char *line)
2043 {
2044         char *next = line;
2045
2046         if (line == NULL || !*line)
2047                 return;
2048         while ((line = next) != NULL) {
2049                 if ((next = strchr(line,' ')) != NULL)
2050                         *next++ = 0;
2051                 if (!ide_setup(line))
2052                         printk (KERN_INFO "Unknown option '%s'\n", line);
2053         }
2054 }
2055
2056 int __init init_module (void)
2057 {
2058         parse_options(options);
2059         return ide_init();
2060 }
2061
2062 void cleanup_module (void)
2063 {
2064         int index;
2065
2066         for (index = 0; index < MAX_HWIFS; ++index)
2067                 ide_unregister(index);
2068
2069 #ifdef CONFIG_PROC_FS
2070         proc_ide_destroy();
2071 #endif
2072
2073         bus_unregister(&ide_bus_type);
2074 }
2075
2076 #else /* !MODULE */
2077
2078 __setup("", ide_setup);
2079
2080 module_init(ide_init);
2081
2082 #endif /* MODULE */