8af179b531c3b95e8fed1e292e855949f915186d
[linux-2.6.git] / 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/config.h>
134 #include <linux/module.h>
135 #include <linux/types.h>
136 #include <linux/string.h>
137 #include <linux/kernel.h>
138 #include <linux/timer.h>
139 #include <linux/mm.h>
140 #include <linux/interrupt.h>
141 #include <linux/major.h>
142 #include <linux/errno.h>
143 #include <linux/genhd.h>
144 #include <linux/blkpg.h>
145 #include <linux/slab.h>
146 #include <linux/init.h>
147 #include <linux/pci.h>
148 #include <linux/delay.h>
149 #include <linux/ide.h>
150 #include <linux/devfs_fs_kernel.h>
151 #include <linux/completion.h>
152 #include <linux/reboot.h>
153 #include <linux/cdrom.h>
154 #include <linux/seq_file.h>
155 #include <linux/device.h>
156 #include <linux/bitops.h>
157
158 #include <asm/byteorder.h>
159 #include <asm/irq.h>
160 #include <asm/uaccess.h>
161 #include <asm/io.h>
162
163
164 /* default maximum number of failures */
165 #define IDE_DEFAULT_MAX_FAILURES        1
166
167 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
168                                         IDE2_MAJOR, IDE3_MAJOR,
169                                         IDE4_MAJOR, IDE5_MAJOR,
170                                         IDE6_MAJOR, IDE7_MAJOR,
171                                         IDE8_MAJOR, IDE9_MAJOR };
172
173 static int idebus_parameter;    /* holds the "idebus=" parameter */
174 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
175 static int initializing;        /* set while initializing built-in drivers */
176
177 DECLARE_MUTEX(ide_cfg_sem);
178  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
179
180 #ifdef CONFIG_BLK_DEV_IDEPCI
181 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
182 #endif
183
184 #ifdef CONFIG_IDEDMA_AUTO
185 int noautodma = 0;
186 #else
187 int noautodma = 1;
188 #endif
189
190 EXPORT_SYMBOL(noautodma);
191
192 /*
193  * This is declared extern in ide.h, for access by other IDE modules:
194  */
195 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
196
197 EXPORT_SYMBOL(ide_hwifs);
198
199 /*
200  * Do not even *think* about calling this!
201  */
202 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
203 {
204         unsigned int unit;
205
206         /* bulk initialize hwif & drive info with zeros */
207         memset(hwif, 0, sizeof(ide_hwif_t));
208
209         /* fill in any non-zero initial values */
210         hwif->index     = index;
211         hwif->major     = ide_hwif_to_major[index];
212
213         hwif->name[0]   = 'i';
214         hwif->name[1]   = 'd';
215         hwif->name[2]   = 'e';
216         hwif->name[3]   = '0' + index;
217
218         hwif->bus_state = BUSSTATE_ON;
219
220         hwif->atapi_dma = 0;            /* disable all atapi dma */ 
221         hwif->ultra_mask = 0x80;        /* disable all ultra */
222         hwif->mwdma_mask = 0x80;        /* disable all mwdma */
223         hwif->swdma_mask = 0x80;        /* disable all swdma */
224
225         sema_init(&hwif->gendev_rel_sem, 0);
226
227         default_hwif_iops(hwif);
228         default_hwif_transport(hwif);
229         for (unit = 0; unit < MAX_DRIVES; ++unit) {
230                 ide_drive_t *drive = &hwif->drives[unit];
231
232                 drive->media                    = ide_disk;
233                 drive->select.all               = (unit<<4)|0xa0;
234                 drive->hwif                     = hwif;
235                 drive->ctl                      = 0x08;
236                 drive->ready_stat               = READY_STAT;
237                 drive->bad_wstat                = BAD_W_STAT;
238                 drive->special.b.recalibrate    = 1;
239                 drive->special.b.set_geometry   = 1;
240                 drive->name[0]                  = 'h';
241                 drive->name[1]                  = 'd';
242                 drive->name[2]                  = 'a' + (index * MAX_DRIVES) + unit;
243                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
244                 drive->using_dma                = 0;
245                 drive->is_flash                 = 0;
246                 drive->vdma                     = 0;
247                 INIT_LIST_HEAD(&drive->list);
248                 sema_init(&drive->gendev_rel_sem, 0);
249         }
250 }
251
252 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
253 {
254         hw_regs_t hw;
255
256         memset(&hw, 0, sizeof(hw_regs_t));
257
258         ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
259
260         memcpy(&hwif->hw, &hw, sizeof(hw));
261         memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
262
263         hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
264 #ifdef CONFIG_BLK_DEV_HD
265         if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
266                 hwif->noprobe = 1;      /* may be overridden by ide_setup() */
267 #endif
268 }
269
270 extern void ide_arm_init(void);
271
272 /*
273  * init_ide_data() sets reasonable default values into all fields
274  * of all instances of the hwifs and drives, but only on the first call.
275  * Subsequent calls have no effect (they don't wipe out anything).
276  *
277  * This routine is normally called at driver initialization time,
278  * but may also be called MUCH earlier during kernel "command-line"
279  * parameter processing.  As such, we cannot depend on any other parts
280  * of the kernel (such as memory allocation) to be functioning yet.
281  *
282  * This is too bad, as otherwise we could dynamically allocate the
283  * ide_drive_t structs as needed, rather than always consuming memory
284  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
285  *
286  * FIXME: We should stuff the setup data into __init and copy the
287  * relevant hwifs/allocate them properly during boot.
288  */
289 #define MAGIC_COOKIE 0x12345678
290 static void __init init_ide_data (void)
291 {
292         ide_hwif_t *hwif;
293         unsigned int index;
294         static unsigned long magic_cookie = MAGIC_COOKIE;
295
296         if (magic_cookie != MAGIC_COOKIE)
297                 return;         /* already initialized */
298         magic_cookie = 0;
299
300         /* Initialise all interface structures */
301         for (index = 0; index < MAX_HWIFS; ++index) {
302                 hwif = &ide_hwifs[index];
303                 init_hwif_data(hwif, index);
304                 init_hwif_default(hwif, index);
305 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
306                 hwif->irq = hwif->hw.irq =
307                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
308 #endif
309         }
310 #ifdef CONFIG_IDE_ARM
311         initializing = 1;
312         ide_arm_init();
313         initializing = 0;
314 #endif
315 }
316
317 /**
318  *      ide_system_bus_speed    -       guess bus speed
319  *
320  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
321  *      bus speed (in MHz). This is used for calculating interface PIO timings.
322  *      The default is 40 for known PCI systems, 50 otherwise.
323  *      The "idebus=xx" parameter can be used to override this value.
324  *      The actual value to be used is computed/displayed the first time
325  *      through. Drivers should only use this as a last resort.
326  *
327  *      Returns a guessed speed in MHz.
328  */
329
330 static int ide_system_bus_speed(void)
331 {
332 #ifdef CONFIG_PCI
333         static struct pci_device_id pci_default[] = {
334                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
335                 { }
336         };
337 #else
338 #define pci_default 0
339 #endif /* CONFIG_PCI */
340
341         if (!system_bus_speed) {
342                 if (idebus_parameter) {
343                         /* user supplied value */
344                         system_bus_speed = idebus_parameter;
345                 } else if (pci_dev_present(pci_default)) {
346                         /* safe default value for PCI */
347                         system_bus_speed = 33;
348                 } else {
349                         /* safe default value for VESA and PCI */
350                         system_bus_speed = 50;
351                 }
352                 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
353                         "for PIO modes%s\n", system_bus_speed,
354                         idebus_parameter ? "" : "; override with idebus=xx");
355         }
356         return system_bus_speed;
357 }
358
359 #ifdef CONFIG_PROC_FS
360 struct proc_dir_entry *proc_ide_root;
361 #endif
362
363 static struct resource* hwif_request_region(ide_hwif_t *hwif,
364                                             unsigned long addr, int num)
365 {
366         struct resource *res = request_region(addr, num, hwif->name);
367
368         if (!res)
369                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
370                                 hwif->name, addr, addr+num-1);
371         return res;
372 }
373
374 /**
375  *      ide_hwif_request_regions - request resources for IDE
376  *      @hwif: interface to use
377  *
378  *      Requests all the needed resources for an interface.
379  *      Right now core IDE code does this work which is deeply wrong.
380  *      MMIO leaves it to the controller driver,
381  *      PIO will migrate this way over time.
382  */
383
384 int ide_hwif_request_regions(ide_hwif_t *hwif)
385 {
386         unsigned long addr;
387         unsigned int i;
388
389         if (hwif->mmio == 2)
390                 return 0;
391         BUG_ON(hwif->mmio == 1);
392         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
393         if (addr && !hwif_request_region(hwif, addr, 1))
394                 goto control_region_busy;
395         hwif->straight8 = 0;
396         addr = hwif->io_ports[IDE_DATA_OFFSET];
397         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
398                 if (!hwif_request_region(hwif, addr, 8))
399                         goto data_region_busy;
400                 hwif->straight8 = 1;
401                 return 0;
402         }
403         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
404                 addr = hwif->io_ports[i];
405                 if (!hwif_request_region(hwif, addr, 1)) {
406                         while (--i)
407                                 release_region(addr, 1);
408                         goto data_region_busy;
409                 }
410         }
411         return 0;
412
413 data_region_busy:
414         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
415         if (addr)
416                 release_region(addr, 1);
417 control_region_busy:
418         /* If any errors are return, we drop the hwif interface. */
419         return -EBUSY;
420 }
421
422 /**
423  *      ide_hwif_release_regions - free IDE resources
424  *
425  *      Note that we only release the standard ports,
426  *      and do not even try to handle any extra ports
427  *      allocated for weird IDE interface chipsets.
428  *
429  *      Note also that we don't yet handle mmio resources here. More
430  *      importantly our caller should be doing this so we need to 
431  *      restructure this as a helper function for drivers.
432  */
433
434 void ide_hwif_release_regions(ide_hwif_t *hwif)
435 {
436         u32 i = 0;
437
438         if (hwif->mmio == 2)
439                 return;
440         if (hwif->io_ports[IDE_CONTROL_OFFSET])
441                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
442         if (hwif->straight8) {
443                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
444                 return;
445         }
446         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
447                 if (hwif->io_ports[i])
448                         release_region(hwif->io_ports[i], 1);
449 }
450
451 /**
452  *      ide_hwif_restore        -       restore hwif to template
453  *      @hwif: hwif to update
454  *      @tmp_hwif: template
455  *
456  *      Restore hwif to a previous state by copying most settngs
457  *      from the template.
458  */
459
460 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
461 {
462         hwif->hwgroup                   = tmp_hwif->hwgroup;
463
464         hwif->gendev.parent             = tmp_hwif->gendev.parent;
465
466         hwif->proc                      = tmp_hwif->proc;
467
468         hwif->major                     = tmp_hwif->major;
469         hwif->straight8                 = tmp_hwif->straight8;
470         hwif->bus_state                 = tmp_hwif->bus_state;
471
472         hwif->atapi_dma                 = tmp_hwif->atapi_dma;
473         hwif->ultra_mask                = tmp_hwif->ultra_mask;
474         hwif->mwdma_mask                = tmp_hwif->mwdma_mask;
475         hwif->swdma_mask                = tmp_hwif->swdma_mask;
476
477         hwif->chipset                   = tmp_hwif->chipset;
478         hwif->hold                      = tmp_hwif->hold;
479
480 #ifdef CONFIG_BLK_DEV_IDEPCI
481         hwif->pci_dev                   = tmp_hwif->pci_dev;
482         hwif->cds                       = tmp_hwif->cds;
483 #endif
484
485         hwif->tuneproc                  = tmp_hwif->tuneproc;
486         hwif->speedproc                 = tmp_hwif->speedproc;
487         hwif->selectproc                = tmp_hwif->selectproc;
488         hwif->reset_poll                = tmp_hwif->reset_poll;
489         hwif->pre_reset                 = tmp_hwif->pre_reset;
490         hwif->resetproc                 = tmp_hwif->resetproc;
491         hwif->intrproc                  = tmp_hwif->intrproc;
492         hwif->maskproc                  = tmp_hwif->maskproc;
493         hwif->quirkproc                 = tmp_hwif->quirkproc;
494         hwif->busproc                   = tmp_hwif->busproc;
495
496         hwif->ata_input_data            = tmp_hwif->ata_input_data;
497         hwif->ata_output_data           = tmp_hwif->ata_output_data;
498         hwif->atapi_input_bytes         = tmp_hwif->atapi_input_bytes;
499         hwif->atapi_output_bytes        = tmp_hwif->atapi_output_bytes;
500
501         hwif->dma_setup                 = tmp_hwif->dma_setup;
502         hwif->dma_exec_cmd              = tmp_hwif->dma_exec_cmd;
503         hwif->dma_start                 = tmp_hwif->dma_start;
504         hwif->ide_dma_end               = tmp_hwif->ide_dma_end;
505         hwif->ide_dma_check             = tmp_hwif->ide_dma_check;
506         hwif->ide_dma_on                = tmp_hwif->ide_dma_on;
507         hwif->ide_dma_off_quietly       = tmp_hwif->ide_dma_off_quietly;
508         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
509         hwif->ide_dma_host_on           = tmp_hwif->ide_dma_host_on;
510         hwif->ide_dma_host_off          = tmp_hwif->ide_dma_host_off;
511         hwif->ide_dma_lostirq           = tmp_hwif->ide_dma_lostirq;
512         hwif->ide_dma_timeout           = tmp_hwif->ide_dma_timeout;
513
514         hwif->OUTB                      = tmp_hwif->OUTB;
515         hwif->OUTBSYNC                  = tmp_hwif->OUTBSYNC;
516         hwif->OUTW                      = tmp_hwif->OUTW;
517         hwif->OUTL                      = tmp_hwif->OUTL;
518         hwif->OUTSW                     = tmp_hwif->OUTSW;
519         hwif->OUTSL                     = tmp_hwif->OUTSL;
520
521         hwif->INB                       = tmp_hwif->INB;
522         hwif->INW                       = tmp_hwif->INW;
523         hwif->INL                       = tmp_hwif->INL;
524         hwif->INSW                      = tmp_hwif->INSW;
525         hwif->INSL                      = tmp_hwif->INSL;
526
527         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
528
529         hwif->mmio                      = tmp_hwif->mmio;
530         hwif->rqsize                    = tmp_hwif->rqsize;
531         hwif->no_lba48                  = tmp_hwif->no_lba48;
532
533 #ifndef CONFIG_BLK_DEV_IDECS
534         hwif->irq                       = tmp_hwif->irq;
535 #endif
536
537         hwif->dma_base                  = tmp_hwif->dma_base;
538         hwif->dma_master                = tmp_hwif->dma_master;
539         hwif->dma_command               = tmp_hwif->dma_command;
540         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
541         hwif->dma_status                = tmp_hwif->dma_status;
542         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
543         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
544
545         hwif->dma_extra                 = tmp_hwif->dma_extra;
546         hwif->config_data               = tmp_hwif->config_data;
547         hwif->select_data               = tmp_hwif->select_data;
548         hwif->autodma                   = tmp_hwif->autodma;
549         hwif->udma_four                 = tmp_hwif->udma_four;
550         hwif->no_dsc                    = tmp_hwif->no_dsc;
551
552         hwif->hwif_data                 = tmp_hwif->hwif_data;
553 }
554
555 /**
556  *      ide_unregister          -       free an ide interface
557  *      @index: index of interface (will change soon to a pointer)
558  *
559  *      Perform the final unregister of an IDE interface. At the moment
560  *      we don't refcount interfaces so this will also get split up.
561  *
562  *      Locking:
563  *      The caller must not hold the IDE locks
564  *      The drive present/vanishing is not yet properly locked
565  *      Take care with the callbacks. These have been split to avoid
566  *      deadlocking the IDE layer. The shutdown callback is called
567  *      before we take the lock and free resources. It is up to the
568  *      caller to be sure there is no pending I/O here, and that
569  *      the interfce will not be reopened (present/vanishing locking
570  *      isnt yet done btw). After we commit to the final kill we
571  *      call the cleanup callback with the ide locks held.
572  *
573  *      Unregister restores the hwif structures to the default state.
574  *      This is raving bonkers.
575  */
576
577 void ide_unregister(unsigned int index)
578 {
579         ide_drive_t *drive;
580         ide_hwif_t *hwif, *g;
581         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
582         ide_hwgroup_t *hwgroup;
583         int irq_count = 0, unit;
584
585         BUG_ON(index >= MAX_HWIFS);
586
587         BUG_ON(in_interrupt());
588         BUG_ON(irqs_disabled());
589         down(&ide_cfg_sem);
590         spin_lock_irq(&ide_lock);
591         hwif = &ide_hwifs[index];
592         if (!hwif->present)
593                 goto abort;
594         for (unit = 0; unit < MAX_DRIVES; ++unit) {
595                 drive = &hwif->drives[unit];
596                 if (!drive->present) {
597                         if (drive->devfs_name[0] != '\0') {
598                                 devfs_remove(drive->devfs_name);
599                                 drive->devfs_name[0] = '\0';
600                         }
601                         continue;
602                 }
603                 spin_unlock_irq(&ide_lock);
604                 device_unregister(&drive->gendev);
605                 down(&drive->gendev_rel_sem);
606                 spin_lock_irq(&ide_lock);
607         }
608         hwif->present = 0;
609
610         spin_unlock_irq(&ide_lock);
611
612         destroy_proc_ide_interface(hwif);
613
614         hwgroup = hwif->hwgroup;
615         /*
616          * free the irq if we were the only hwif using it
617          */
618         g = hwgroup->hwif;
619         do {
620                 if (g->irq == hwif->irq)
621                         ++irq_count;
622                 g = g->next;
623         } while (g != hwgroup->hwif);
624         if (irq_count == 1)
625                 free_irq(hwif->irq, hwgroup);
626
627         spin_lock_irq(&ide_lock);
628         /*
629          * Note that we only release the standard ports,
630          * and do not even try to handle any extra ports
631          * allocated for weird IDE interface chipsets.
632          */
633         ide_hwif_release_regions(hwif);
634
635         /*
636          * Remove us from the hwgroup, and free
637          * the hwgroup if we were the only member
638          */
639         if (hwif->next == hwif) {
640                 BUG_ON(hwgroup->hwif != hwif);
641                 kfree(hwgroup);
642         } else {
643                 /* There is another interface in hwgroup.
644                  * Unlink us, and set hwgroup->drive and ->hwif to
645                  * something sane.
646                  */
647                 g = hwgroup->hwif;
648                 while (g->next != hwif)
649                         g = g->next;
650                 g->next = hwif->next;
651                 if (hwgroup->hwif == hwif) {
652                         /* Chose a random hwif for hwgroup->hwif.
653                          * It's guaranteed that there are no drives
654                          * left in the hwgroup.
655                          */
656                         BUG_ON(hwgroup->drive != NULL);
657                         hwgroup->hwif = g;
658                 }
659                 BUG_ON(hwgroup->hwif == hwif);
660         }
661
662         /* More messed up locking ... */
663         spin_unlock_irq(&ide_lock);
664         device_unregister(&hwif->gendev);
665         down(&hwif->gendev_rel_sem);
666
667         /*
668          * Remove us from the kernel's knowledge
669          */
670         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
671         kfree(hwif->sg_table);
672         unregister_blkdev(hwif->major, hwif->name);
673         spin_lock_irq(&ide_lock);
674
675         if (hwif->dma_base) {
676                 (void) ide_release_dma(hwif);
677
678                 hwif->dma_base = 0;
679                 hwif->dma_master = 0;
680                 hwif->dma_command = 0;
681                 hwif->dma_vendor1 = 0;
682                 hwif->dma_status = 0;
683                 hwif->dma_vendor3 = 0;
684                 hwif->dma_prdtable = 0;
685         }
686
687         /* copy original settings */
688         tmp_hwif = *hwif;
689
690         /* restore hwif data to pristine status */
691         init_hwif_data(hwif, index);
692         init_hwif_default(hwif, index);
693
694         ide_hwif_restore(hwif, &tmp_hwif);
695
696 abort:
697         spin_unlock_irq(&ide_lock);
698         up(&ide_cfg_sem);
699 }
700
701 EXPORT_SYMBOL(ide_unregister);
702
703
704 /**
705  *      ide_setup_ports         -       set up IDE interface ports
706  *      @hw: register descriptions
707  *      @base: base register
708  *      @offsets: table of register offsets
709  *      @ctrl: control register
710  *      @ack_irq: IRQ ack
711  *      @irq: interrupt lie
712  *
713  *      Setup hw_regs_t structure described by parameters.  You
714  *      may set up the hw structure yourself OR use this routine to
715  *      do it for you. This is basically a helper
716  *
717  */
718  
719 void ide_setup_ports (  hw_regs_t *hw,
720                         unsigned long base, int *offsets,
721                         unsigned long ctrl, unsigned long intr,
722                         ide_ack_intr_t *ack_intr,
723 /*
724  *                      ide_io_ops_t *iops,
725  */
726                         int irq)
727 {
728         int i;
729
730         for (i = 0; i < IDE_NR_PORTS; i++) {
731                 if (offsets[i] == -1) {
732                         switch(i) {
733                                 case IDE_CONTROL_OFFSET:
734                                         hw->io_ports[i] = ctrl;
735                                         break;
736 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
737                                 case IDE_IRQ_OFFSET:
738                                         hw->io_ports[i] = intr;
739                                         break;
740 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
741                                 default:
742                                         hw->io_ports[i] = 0;
743                                         break;
744                         }
745                 } else {
746                         hw->io_ports[i] = base + offsets[i];
747                 }
748         }
749         hw->irq = irq;
750         hw->dma = NO_DMA;
751         hw->ack_intr = ack_intr;
752 /*
753  *      hw->iops = iops;
754  */
755 }
756
757 /**
758  *      ide_register_hw_with_fixup      -       register IDE interface
759  *      @hw: hardware registers
760  *      @hwifp: pointer to returned hwif
761  *      @fixup: fixup function
762  *
763  *      Register an IDE interface, specifying exactly the registers etc.
764  *      Set init=1 iff calling before probes have taken place.
765  *
766  *      Returns -1 on error.
767  */
768
769 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
770 {
771         int index, retry = 1;
772         ide_hwif_t *hwif;
773
774         do {
775                 for (index = 0; index < MAX_HWIFS; ++index) {
776                         hwif = &ide_hwifs[index];
777                         if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
778                                 goto found;
779                 }
780                 for (index = 0; index < MAX_HWIFS; ++index) {
781                         hwif = &ide_hwifs[index];
782                         if (hwif->hold)
783                                 continue;
784                         if ((!hwif->present && !hwif->mate && !initializing) ||
785                             (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
786                                 goto found;
787                 }
788                 for (index = 0; index < MAX_HWIFS; index++)
789                         ide_unregister(index);
790         } while (retry--);
791         return -1;
792 found:
793         if (hwif->present)
794                 ide_unregister(index);
795         else if (!hwif->hold) {
796                 init_hwif_data(hwif, index);
797                 init_hwif_default(hwif, index);
798         }
799         if (hwif->present)
800                 return -1;
801         memcpy(&hwif->hw, hw, sizeof(*hw));
802         memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
803         hwif->irq = hw->irq;
804         hwif->noprobe = 0;
805         hwif->chipset = hw->chipset;
806         hwif->gendev.parent = hw->dev;
807
808         if (!initializing) {
809                 probe_hwif_init_with_fixup(hwif, fixup);
810                 create_proc_ide_interfaces();
811         }
812
813         if (hwifp)
814                 *hwifp = hwif;
815
816         return (initializing || hwif->present) ? index : -1;
817 }
818
819 EXPORT_SYMBOL(ide_register_hw_with_fixup);
820
821 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
822 {
823         return ide_register_hw_with_fixup(hw, hwifp, NULL);
824 }
825
826 EXPORT_SYMBOL(ide_register_hw);
827
828 /*
829  *      Locks for IDE setting functionality
830  */
831
832 DECLARE_MUTEX(ide_setting_sem);
833
834 /**
835  *      __ide_add_setting       -       add an ide setting option
836  *      @drive: drive to use
837  *      @name: setting name
838  *      @rw: true if the function is read write
839  *      @read_ioctl: function to call on read
840  *      @write_ioctl: function to call on write
841  *      @data_type: type of data
842  *      @min: range minimum
843  *      @max: range maximum
844  *      @mul_factor: multiplication scale
845  *      @div_factor: divison scale
846  *      @data: private data field
847  *      @set: setting
848  *      @auto_remove: setting auto removal flag
849  *
850  *      Removes the setting named from the device if it is present.
851  *      The function takes the settings_lock to protect against 
852  *      parallel changes. This function must not be called from IRQ
853  *      context. Returns 0 on success or -1 on failure.
854  *
855  *      BUGS: This code is seriously over-engineered. There is also
856  *      magic about how the driver specific features are setup. If
857  *      a driver is attached we assume the driver settings are auto
858  *      remove.
859  */
860
861 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)
862 {
863         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
864
865         down(&ide_setting_sem);
866         while ((*p) && strcmp((*p)->name, name) < 0)
867                 p = &((*p)->next);
868         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
869                 goto abort;
870         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
871                 goto abort;
872         strcpy(setting->name, name);
873         setting->rw = rw;
874         setting->read_ioctl = read_ioctl;
875         setting->write_ioctl = write_ioctl;
876         setting->data_type = data_type;
877         setting->min = min;
878         setting->max = max;
879         setting->mul_factor = mul_factor;
880         setting->div_factor = div_factor;
881         setting->data = data;
882         setting->set = set;
883         
884         setting->next = *p;
885         if (auto_remove)
886                 setting->auto_remove = 1;
887         *p = setting;
888         up(&ide_setting_sem);
889         return 0;
890 abort:
891         up(&ide_setting_sem);
892         kfree(setting);
893         return -1;
894 }
895
896 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)
897 {
898         return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
899 }
900
901 EXPORT_SYMBOL(ide_add_setting);
902
903 /**
904  *      __ide_remove_setting    -       remove an ide setting option
905  *      @drive: drive to use
906  *      @name: setting name
907  *
908  *      Removes the setting named from the device if it is present.
909  *      The caller must hold the setting semaphore.
910  */
911  
912 static void __ide_remove_setting (ide_drive_t *drive, char *name)
913 {
914         ide_settings_t **p, *setting;
915
916         p = (ide_settings_t **) &drive->settings;
917
918         while ((*p) && strcmp((*p)->name, name))
919                 p = &((*p)->next);
920         if ((setting = (*p)) == NULL)
921                 return;
922
923         (*p) = setting->next;
924         
925         kfree(setting->name);
926         kfree(setting);
927 }
928
929 /**
930  *      ide_find_setting_by_ioctl       -       find a drive specific ioctl
931  *      @drive: drive to scan
932  *      @cmd: ioctl command to handle
933  *
934  *      Scan's the device setting table for a matching entry and returns
935  *      this or NULL if no entry is found. The caller must hold the
936  *      setting semaphore
937  */
938  
939 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
940 {
941         ide_settings_t *setting = drive->settings;
942
943         while (setting) {
944                 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
945                         break;
946                 setting = setting->next;
947         }
948         
949         return setting;
950 }
951
952 /**
953  *      ide_find_setting_by_name        -       find a drive specific setting
954  *      @drive: drive to scan
955  *      @name: setting name
956  *
957  *      Scan's the device setting table for a matching entry and returns
958  *      this or NULL if no entry is found. The caller must hold the
959  *      setting semaphore
960  */
961  
962 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
963 {
964         ide_settings_t *setting = drive->settings;
965
966         while (setting) {
967                 if (strcmp(setting->name, name) == 0)
968                         break;
969                 setting = setting->next;
970         }
971         return setting;
972 }
973
974 /**
975  *      auto_remove_settings    -       remove driver specific settings
976  *      @drive: drive
977  *
978  *      Automatically remove all the driver specific settings for this
979  *      drive. This function may sleep and must not be called from IRQ
980  *      context. The caller must hold ide_setting_sem.
981  */
982  
983 static void auto_remove_settings (ide_drive_t *drive)
984 {
985         ide_settings_t *setting;
986 repeat:
987         setting = drive->settings;
988         while (setting) {
989                 if (setting->auto_remove) {
990                         __ide_remove_setting(drive, setting->name);
991                         goto repeat;
992                 }
993                 setting = setting->next;
994         }
995 }
996
997 /**
998  *      ide_read_setting        -       read an IDE setting
999  *      @drive: drive to read from
1000  *      @setting: drive setting
1001  *
1002  *      Read a drive setting and return the value. The caller
1003  *      must hold the ide_setting_sem when making this call.
1004  *
1005  *      BUGS: the data return and error are the same return value
1006  *      so an error -EINVAL and true return of the same value cannot
1007  *      be told apart
1008  */
1009  
1010 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1011 {
1012         int             val = -EINVAL;
1013         unsigned long   flags;
1014
1015         if ((setting->rw & SETTING_READ)) {
1016                 spin_lock_irqsave(&ide_lock, flags);
1017                 switch(setting->data_type) {
1018                         case TYPE_BYTE:
1019                                 val = *((u8 *) setting->data);
1020                                 break;
1021                         case TYPE_SHORT:
1022                                 val = *((u16 *) setting->data);
1023                                 break;
1024                         case TYPE_INT:
1025                         case TYPE_INTA:
1026                                 val = *((u32 *) setting->data);
1027                                 break;
1028                 }
1029                 spin_unlock_irqrestore(&ide_lock, flags);
1030         }
1031         return val;
1032 }
1033
1034 /**
1035  *      ide_spin_wait_hwgroup   -       wait for group
1036  *      @drive: drive in the group
1037  *
1038  *      Wait for an IDE device group to go non busy and then return
1039  *      holding the ide_lock which guards the hwgroup->busy status
1040  *      and right to use it.
1041  */
1042
1043 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1044 {
1045         ide_hwgroup_t *hwgroup = HWGROUP(drive);
1046         unsigned long timeout = jiffies + (3 * HZ);
1047
1048         spin_lock_irq(&ide_lock);
1049
1050         while (hwgroup->busy) {
1051                 unsigned long lflags;
1052                 spin_unlock_irq(&ide_lock);
1053                 local_irq_set(lflags);
1054                 if (time_after(jiffies, timeout)) {
1055                         local_irq_restore(lflags);
1056                         printk(KERN_ERR "%s: channel busy\n", drive->name);
1057                         return -EBUSY;
1058                 }
1059                 local_irq_restore(lflags);
1060                 spin_lock_irq(&ide_lock);
1061         }
1062         return 0;
1063 }
1064
1065 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1066
1067 /**
1068  *      ide_write_setting       -       read an IDE setting
1069  *      @drive: drive to read from
1070  *      @setting: drive setting
1071  *      @val: value
1072  *
1073  *      Write a drive setting if it is possible. The caller
1074  *      must hold the ide_setting_sem when making this call.
1075  *
1076  *      BUGS: the data return and error are the same return value
1077  *      so an error -EINVAL and true return of the same value cannot
1078  *      be told apart
1079  *
1080  *      FIXME:  This should be changed to enqueue a special request
1081  *      to the driver to change settings, and then wait on a sema for completion.
1082  *      The current scheme of polling is kludgy, though safe enough.
1083  */
1084
1085 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1086 {
1087         int i;
1088         u32 *p;
1089
1090         if (!capable(CAP_SYS_ADMIN))
1091                 return -EACCES;
1092         if (!(setting->rw & SETTING_WRITE))
1093                 return -EPERM;
1094         if (val < setting->min || val > setting->max)
1095                 return -EINVAL;
1096         if (setting->set)
1097                 return setting->set(drive, val);
1098         if (ide_spin_wait_hwgroup(drive))
1099                 return -EBUSY;
1100         switch (setting->data_type) {
1101                 case TYPE_BYTE:
1102                         *((u8 *) setting->data) = val;
1103                         break;
1104                 case TYPE_SHORT:
1105                         *((u16 *) setting->data) = val;
1106                         break;
1107                 case TYPE_INT:
1108                         *((u32 *) setting->data) = val;
1109                         break;
1110                 case TYPE_INTA:
1111                         p = (u32 *) setting->data;
1112                         for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1113                                 *p = val;
1114                         break;
1115         }
1116         spin_unlock_irq(&ide_lock);
1117         return 0;
1118 }
1119
1120 static int set_io_32bit(ide_drive_t *drive, int arg)
1121 {
1122         drive->io_32bit = arg;
1123 #ifdef CONFIG_BLK_DEV_DTC2278
1124         if (HWIF(drive)->chipset == ide_dtc2278)
1125                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1126 #endif /* CONFIG_BLK_DEV_DTC2278 */
1127         return 0;
1128 }
1129
1130 static int set_using_dma (ide_drive_t *drive, int arg)
1131 {
1132 #ifdef CONFIG_BLK_DEV_IDEDMA
1133         if (!drive->id || !(drive->id->capability & 1))
1134                 return -EPERM;
1135         if (HWIF(drive)->ide_dma_check == NULL)
1136                 return -EPERM;
1137         if (arg) {
1138                 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1139                 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1140         } else {
1141                 if (__ide_dma_off(drive))
1142                         return -EIO;
1143         }
1144         return 0;
1145 #else
1146         return -EPERM;
1147 #endif
1148 }
1149
1150 static int set_pio_mode (ide_drive_t *drive, int arg)
1151 {
1152         struct request rq;
1153
1154         if (!HWIF(drive)->tuneproc)
1155                 return -ENOSYS;
1156         if (drive->special.b.set_tune)
1157                 return -EBUSY;
1158         ide_init_drive_cmd(&rq);
1159         drive->tune_req = (u8) arg;
1160         drive->special.b.set_tune = 1;
1161         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1162         return 0;
1163 }
1164
1165 static int set_xfer_rate (ide_drive_t *drive, int arg)
1166 {
1167         int err = ide_wait_cmd(drive,
1168                         WIN_SETFEATURES, (u8) arg,
1169                         SETFEATURES_XFER, 0, NULL);
1170
1171         if (!err && arg) {
1172                 ide_set_xfer_rate(drive, (u8) arg);
1173                 ide_driveid_update(drive);
1174         }
1175         return err;
1176 }
1177
1178 /**
1179  *      ide_add_generic_settings        -       generic ide settings
1180  *      @drive: drive being configured
1181  *
1182  *      Add the generic parts of the system settings to the /proc files and
1183  *      ioctls for this IDE device. The caller must not be holding the
1184  *      ide_setting_sem.
1185  */
1186
1187 void ide_add_generic_settings (ide_drive_t *drive)
1188 {
1189 /*
1190  *                        drive         setting name            read/write access                               read ioctl              write ioctl             data type       min     max                             mul_factor      div_factor      data pointer                    set function
1191  */
1192         __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);
1193         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     HDIO_GET_KEEPSETTINGS,  HDIO_SET_KEEPSETTINGS,  TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
1194         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
1195         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  -1,                     HDIO_SET_PIO_MODE,      TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
1196         __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);
1197         __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);
1198         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
1199         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
1200         __ide_add_setting(drive,        "number",               SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
1201 }
1202
1203 /**
1204  *      system_bus_clock        -       clock guess
1205  *
1206  *      External version of the bus clock guess used by very old IDE drivers
1207  *      for things like VLB timings. Should not be used.
1208  */
1209
1210 int system_bus_clock (void)
1211 {
1212         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1213 }
1214
1215 EXPORT_SYMBOL(system_bus_clock);
1216
1217 static int generic_ide_suspend(struct device *dev, pm_message_t state)
1218 {
1219         ide_drive_t *drive = dev->driver_data;
1220         struct request rq;
1221         struct request_pm_state rqpm;
1222         ide_task_t args;
1223
1224         memset(&rq, 0, sizeof(rq));
1225         memset(&rqpm, 0, sizeof(rqpm));
1226         memset(&args, 0, sizeof(args));
1227         rq.flags = REQ_PM_SUSPEND;
1228         rq.special = &args;
1229         rq.pm = &rqpm;
1230         rqpm.pm_step = ide_pm_state_start_suspend;
1231         rqpm.pm_state = state.event;
1232
1233         return ide_do_drive_cmd(drive, &rq, ide_wait);
1234 }
1235
1236 static int generic_ide_resume(struct device *dev)
1237 {
1238         ide_drive_t *drive = dev->driver_data;
1239         struct request rq;
1240         struct request_pm_state rqpm;
1241         ide_task_t args;
1242
1243         memset(&rq, 0, sizeof(rq));
1244         memset(&rqpm, 0, sizeof(rqpm));
1245         memset(&args, 0, sizeof(args));
1246         rq.flags = REQ_PM_RESUME;
1247         rq.special = &args;
1248         rq.pm = &rqpm;
1249         rqpm.pm_step = ide_pm_state_start_resume;
1250         rqpm.pm_state = PM_EVENT_ON;
1251
1252         return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1253 }
1254
1255 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1256                         unsigned int cmd, unsigned long arg)
1257 {
1258         ide_settings_t *setting;
1259         ide_driver_t *drv;
1260         int err = 0;
1261         void __user *p = (void __user *)arg;
1262
1263         down(&ide_setting_sem);
1264         if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1265                 if (cmd == setting->read_ioctl) {
1266                         err = ide_read_setting(drive, setting);
1267                         up(&ide_setting_sem);
1268                         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1269                 } else {
1270                         if (bdev != bdev->bd_contains)
1271                                 err = -EINVAL;
1272                         else
1273                                 err = ide_write_setting(drive, setting, arg);
1274                         up(&ide_setting_sem);
1275                         return err;
1276                 }
1277         }
1278         up(&ide_setting_sem);
1279
1280         switch (cmd) {
1281                 case HDIO_GETGEO:
1282                 {
1283                         struct hd_geometry geom;
1284                         if (!p || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL;
1285                         geom.heads = drive->bios_head;
1286                         geom.sectors = drive->bios_sect;
1287                         geom.cylinders = (u16)drive->bios_cyl; /* truncate */
1288                         geom.start = get_start_sect(bdev);
1289                         if (copy_to_user(p, &geom, sizeof(struct hd_geometry)))
1290                                 return -EFAULT;
1291                         return 0;
1292                 }
1293
1294                 case HDIO_OBSOLETE_IDENTITY:
1295                 case HDIO_GET_IDENTITY:
1296                         if (bdev != bdev->bd_contains)
1297                                 return -EINVAL;
1298                         if (drive->id_read == 0)
1299                                 return -ENOMSG;
1300                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1301                                 return -EFAULT;
1302                         return 0;
1303
1304                 case HDIO_GET_NICE:
1305                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1306                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1307                                         drive->nice0            <<      IDE_NICE_0              |
1308                                         drive->nice1            <<      IDE_NICE_1              |
1309                                         drive->nice2            <<      IDE_NICE_2,
1310                                         (long __user *) arg);
1311
1312 #ifdef CONFIG_IDE_TASK_IOCTL
1313                 case HDIO_DRIVE_TASKFILE:
1314                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1315                                 return -EACCES;
1316                         switch(drive->media) {
1317                                 case ide_disk:
1318                                         return ide_taskfile_ioctl(drive, cmd, arg);
1319                                 default:
1320                                         return -ENOMSG;
1321                         }
1322 #endif /* CONFIG_IDE_TASK_IOCTL */
1323
1324                 case HDIO_DRIVE_CMD:
1325                         if (!capable(CAP_SYS_RAWIO))
1326                                 return -EACCES;
1327                         return ide_cmd_ioctl(drive, cmd, arg);
1328
1329                 case HDIO_DRIVE_TASK:
1330                         if (!capable(CAP_SYS_RAWIO))
1331                                 return -EACCES;
1332                         return ide_task_ioctl(drive, cmd, arg);
1333
1334                 case HDIO_SCAN_HWIF:
1335                 {
1336                         hw_regs_t hw;
1337                         int args[3];
1338                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1339                         if (copy_from_user(args, p, 3 * sizeof(int)))
1340                                 return -EFAULT;
1341                         memset(&hw, 0, sizeof(hw));
1342                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1343                                             (unsigned long) args[1], NULL);
1344                         hw.irq = args[2];
1345                         if (ide_register_hw(&hw, NULL) == -1)
1346                                 return -EIO;
1347                         return 0;
1348                 }
1349                 case HDIO_UNREGISTER_HWIF:
1350                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1351                         /* (arg > MAX_HWIFS) checked in function */
1352                         ide_unregister(arg);
1353                         return 0;
1354                 case HDIO_SET_NICE:
1355                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1356                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1357                                 return -EPERM;
1358                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1359                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1360                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1361                                 drive->dsc_overlap = 0;
1362                                 return -EPERM;
1363                         }
1364                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1365                         return 0;
1366                 case HDIO_DRIVE_RESET:
1367                 {
1368                         unsigned long flags;
1369                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1370                         
1371                         /*
1372                          *      Abort the current command on the
1373                          *      group if there is one, taking
1374                          *      care not to allow anything else
1375                          *      to be queued and to die on the
1376                          *      spot if we miss one somehow
1377                          */
1378
1379                         spin_lock_irqsave(&ide_lock, flags);
1380
1381                         ide_abort(drive, "drive reset");
1382
1383                         if(HWGROUP(drive)->handler)
1384                                 BUG();
1385                                 
1386                         /* Ensure nothing gets queued after we
1387                            drop the lock. Reset will clear the busy */
1388                    
1389                         HWGROUP(drive)->busy = 1;
1390                         spin_unlock_irqrestore(&ide_lock, flags);
1391                         (void) ide_do_reset(drive);
1392
1393                         return 0;
1394                 }
1395
1396                 case CDROMEJECT:
1397                 case CDROMCLOSETRAY:
1398                         return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1399
1400                 case HDIO_GET_BUSSTATE:
1401                         if (!capable(CAP_SYS_ADMIN))
1402                                 return -EACCES;
1403                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1404                                 return -EFAULT;
1405                         return 0;
1406
1407                 case HDIO_SET_BUSSTATE:
1408                         if (!capable(CAP_SYS_ADMIN))
1409                                 return -EACCES;
1410                         if (HWIF(drive)->busproc)
1411                                 return HWIF(drive)->busproc(drive, (int)arg);
1412                         return -EOPNOTSUPP;
1413                 default:
1414                         return -EINVAL;
1415         }
1416 }
1417
1418 EXPORT_SYMBOL(generic_ide_ioctl);
1419
1420 /*
1421  * stridx() returns the offset of c within s,
1422  * or -1 if c is '\0' or not found within s.
1423  */
1424 static int __init stridx (const char *s, char c)
1425 {
1426         char *i = strchr(s, c);
1427         return (i && c) ? i - s : -1;
1428 }
1429
1430 /*
1431  * match_parm() does parsing for ide_setup():
1432  *
1433  * 1. the first char of s must be '='.
1434  * 2. if the remainder matches one of the supplied keywords,
1435  *     the index (1 based) of the keyword is negated and returned.
1436  * 3. if the remainder is a series of no more than max_vals numbers
1437  *     separated by commas, the numbers are saved in vals[] and a
1438  *     count of how many were saved is returned.  Base10 is assumed,
1439  *     and base16 is allowed when prefixed with "0x".
1440  * 4. otherwise, zero is returned.
1441  */
1442 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1443 {
1444         static const char *decimal = "0123456789";
1445         static const char *hex = "0123456789abcdef";
1446         int i, n;
1447
1448         if (*s++ == '=') {
1449                 /*
1450                  * Try matching against the supplied keywords,
1451                  * and return -(index+1) if we match one
1452                  */
1453                 if (keywords != NULL) {
1454                         for (i = 0; *keywords != NULL; ++i) {
1455                                 if (!strcmp(s, *keywords++))
1456                                         return -(i+1);
1457                         }
1458                 }
1459                 /*
1460                  * Look for a series of no more than "max_vals"
1461                  * numeric values separated by commas, in base10,
1462                  * or base16 when prefixed with "0x".
1463                  * Return a count of how many were found.
1464                  */
1465                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1466                         vals[n] = i;
1467                         while ((i = stridx(decimal, *++s)) >= 0)
1468                                 vals[n] = (vals[n] * 10) + i;
1469                         if (*s == 'x' && !vals[n]) {
1470                                 while ((i = stridx(hex, *++s)) >= 0)
1471                                         vals[n] = (vals[n] * 0x10) + i;
1472                         }
1473                         if (++n == max_vals)
1474                                 break;
1475                         if (*s == ',' || *s == ';')
1476                                 ++s;
1477                 }
1478                 if (!*s)
1479                         return n;
1480         }
1481         return 0;       /* zero = nothing matched */
1482 }
1483
1484 #ifdef CONFIG_BLK_DEV_ALI14XX
1485 static int __initdata probe_ali14xx;
1486 extern int ali14xx_init(void);
1487 #endif
1488 #ifdef CONFIG_BLK_DEV_UMC8672
1489 static int __initdata probe_umc8672;
1490 extern int umc8672_init(void);
1491 #endif
1492 #ifdef CONFIG_BLK_DEV_DTC2278
1493 static int __initdata probe_dtc2278;
1494 extern int dtc2278_init(void);
1495 #endif
1496 #ifdef CONFIG_BLK_DEV_HT6560B
1497 static int __initdata probe_ht6560b;
1498 extern int ht6560b_init(void);
1499 #endif
1500 #ifdef CONFIG_BLK_DEV_QD65XX
1501 static int __initdata probe_qd65xx;
1502 extern int qd65xx_init(void);
1503 #endif
1504
1505 static int __initdata is_chipset_set[MAX_HWIFS];
1506
1507 /*
1508  * ide_setup() gets called VERY EARLY during initialization,
1509  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1510  *
1511  * Remember to update Documentation/ide.txt if you change something here.
1512  */
1513 static int __init ide_setup(char *s)
1514 {
1515         int i, vals[3];
1516         ide_hwif_t *hwif;
1517         ide_drive_t *drive;
1518         unsigned int hw, unit;
1519         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1520         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1521
1522         
1523         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1524                 return 0;                               /* driver and not us */
1525
1526         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1527                 return 0;
1528
1529         printk(KERN_INFO "ide_setup: %s", s);
1530         init_ide_data ();
1531
1532 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1533         if (!strcmp(s, "ide=doubler")) {
1534                 extern int ide_doubler;
1535
1536                 printk(" : Enabled support for IDE doublers\n");
1537                 ide_doubler = 1;
1538                 return 1;
1539         }
1540 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1541
1542         if (!strcmp(s, "ide=nodma")) {
1543                 printk(" : Prevented DMA\n");
1544                 noautodma = 1;
1545                 return 1;
1546         }
1547
1548 #ifdef CONFIG_BLK_DEV_IDEPCI
1549         if (!strcmp(s, "ide=reverse")) {
1550                 ide_scan_direction = 1;
1551                 printk(" : Enabled support for IDE inverse scan order.\n");
1552                 return 1;
1553         }
1554 #endif /* CONFIG_BLK_DEV_IDEPCI */
1555
1556         /*
1557          * Look for drive options:  "hdx="
1558          */
1559         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1560                 const char *hd_words[] = {
1561                         "none", "noprobe", "nowerr", "cdrom", "serialize",
1562                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1563                         "minus11", "remap", "remap63", "scsi", NULL };
1564                 unit = s[2] - 'a';
1565                 hw   = unit / MAX_DRIVES;
1566                 unit = unit % MAX_DRIVES;
1567                 hwif = &ide_hwifs[hw];
1568                 drive = &hwif->drives[unit];
1569                 if (strncmp(s + 4, "ide-", 4) == 0) {
1570                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1571                         goto done;
1572                 }
1573                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1574                         case -1: /* "none" */
1575                         case -2: /* "noprobe" */
1576                                 drive->noprobe = 1;
1577                                 goto done;
1578                         case -3: /* "nowerr" */
1579                                 drive->bad_wstat = BAD_R_STAT;
1580                                 hwif->noprobe = 0;
1581                                 goto done;
1582                         case -4: /* "cdrom" */
1583                                 drive->present = 1;
1584                                 drive->media = ide_cdrom;
1585                                 /* an ATAPI device ignores DRDY */
1586                                 drive->ready_stat = 0;
1587                                 hwif->noprobe = 0;
1588                                 goto done;
1589                         case -5: /* "serialize" */
1590                                 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1591                                 goto do_serialize;
1592                         case -6: /* "autotune" */
1593                                 drive->autotune = IDE_TUNE_AUTO;
1594                                 goto obsolete_option;
1595                         case -7: /* "noautotune" */
1596                                 drive->autotune = IDE_TUNE_NOAUTO;
1597                                 goto obsolete_option;
1598                         case -9: /* "swapdata" */
1599                         case -10: /* "bswap" */
1600                                 drive->bswap = 1;
1601                                 goto done;
1602                         case -12: /* "remap" */
1603                                 drive->remap_0_to_1 = 1;
1604                                 goto done;
1605                         case -13: /* "remap63" */
1606                                 drive->sect0 = 63;
1607                                 goto done;
1608                         case -14: /* "scsi" */
1609                                 drive->scsi = 1;
1610                                 goto done;
1611                         case 3: /* cyl,head,sect */
1612                                 drive->media    = ide_disk;
1613                                 drive->ready_stat = READY_STAT;
1614                                 drive->cyl      = drive->bios_cyl  = vals[0];
1615                                 drive->head     = drive->bios_head = vals[1];
1616                                 drive->sect     = drive->bios_sect = vals[2];
1617                                 drive->present  = 1;
1618                                 drive->forced_geom = 1;
1619                                 hwif->noprobe = 0;
1620                                 goto done;
1621                         default:
1622                                 goto bad_option;
1623                 }
1624         }
1625
1626         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1627                 goto bad_option;
1628         /*
1629          * Look for bus speed option:  "idebus="
1630          */
1631         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1632                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1633                         goto bad_option;
1634                 if (vals[0] >= 20 && vals[0] <= 66) {
1635                         idebus_parameter = vals[0];
1636                 } else
1637                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1638                 goto done;
1639         }
1640         /*
1641          * Look for interface options:  "idex="
1642          */
1643         if (s[3] >= '0' && s[3] <= max_hwif) {
1644                 /*
1645                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1646                  * (-8, -9, -10) are reserved to ease the hardcoding.
1647                  */
1648                 static const char *ide_words[] = {
1649                         "noprobe", "serialize", "autotune", "noautotune", 
1650                         "reset", "dma", "ata66", "minus8", "minus9",
1651                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1652                         "dtc2278", "umc8672", "ali14xx", NULL };
1653                 hw = s[3] - '0';
1654                 hwif = &ide_hwifs[hw];
1655                 i = match_parm(&s[4], ide_words, vals, 3);
1656
1657                 /*
1658                  * Cryptic check to ensure chipset not already set for hwif.
1659                  * Note: we can't depend on hwif->chipset here.
1660                  */
1661                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1662                         /* chipset already specified */
1663                         if (is_chipset_set[hw])
1664                                 goto bad_option;
1665                         if (i > -18 && i <= -11) {
1666                                 /* these drivers are for "ide0=" only */
1667                                 if (hw != 0)
1668                                         goto bad_hwif;
1669                                 /* chipset already specified for 2nd port */
1670                                 if (is_chipset_set[hw+1])
1671                                         goto bad_option;
1672                         }
1673                         is_chipset_set[hw] = 1;
1674                         printk("\n");
1675                 }
1676
1677                 switch (i) {
1678 #ifdef CONFIG_BLK_DEV_ALI14XX
1679                         case -17: /* "ali14xx" */
1680                                 probe_ali14xx = 1;
1681                                 goto done;
1682 #endif
1683 #ifdef CONFIG_BLK_DEV_UMC8672
1684                         case -16: /* "umc8672" */
1685                                 probe_umc8672 = 1;
1686                                 goto done;
1687 #endif
1688 #ifdef CONFIG_BLK_DEV_DTC2278
1689                         case -15: /* "dtc2278" */
1690                                 probe_dtc2278 = 1;
1691                                 goto done;
1692 #endif
1693 #ifdef CONFIG_BLK_DEV_CMD640
1694                         case -14: /* "cmd640_vlb" */
1695                         {
1696                                 extern int cmd640_vlb; /* flag for cmd640.c */
1697                                 cmd640_vlb = 1;
1698                                 goto done;
1699                         }
1700 #endif
1701 #ifdef CONFIG_BLK_DEV_HT6560B
1702                         case -13: /* "ht6560b" */
1703                                 probe_ht6560b = 1;
1704                                 goto done;
1705 #endif
1706 #ifdef CONFIG_BLK_DEV_QD65XX
1707                         case -12: /* "qd65xx" */
1708                                 probe_qd65xx = 1;
1709                                 goto done;
1710 #endif
1711 #ifdef CONFIG_BLK_DEV_4DRIVES
1712                         case -11: /* "four" drives on one set of ports */
1713                         {
1714                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1715                                 mate->drives[0].select.all ^= 0x20;
1716                                 mate->drives[1].select.all ^= 0x20;
1717                                 hwif->chipset = mate->chipset = ide_4drives;
1718                                 mate->irq = hwif->irq;
1719                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1720                                 goto do_serialize;
1721                         }
1722 #endif /* CONFIG_BLK_DEV_4DRIVES */
1723                         case -10: /* minus10 */
1724                         case -9: /* minus9 */
1725                         case -8: /* minus8 */
1726                                 goto bad_option;
1727                         case -7: /* ata66 */
1728 #ifdef CONFIG_BLK_DEV_IDEPCI
1729                                 hwif->udma_four = 1;
1730                                 goto obsolete_option;
1731 #else
1732                                 goto bad_hwif;
1733 #endif
1734                         case -6: /* dma */
1735                                 hwif->autodma = 1;
1736                                 goto obsolete_option;
1737                         case -5: /* "reset" */
1738                                 hwif->reset = 1;
1739                                 goto obsolete_option;
1740                         case -4: /* "noautotune" */
1741                                 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1742                                 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1743                                 goto obsolete_option;
1744                         case -3: /* "autotune" */
1745                                 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1746                                 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1747                                 goto obsolete_option;
1748                         case -2: /* "serialize" */
1749                         do_serialize:
1750                                 hwif->mate = &ide_hwifs[hw^1];
1751                                 hwif->mate->mate = hwif;
1752                                 hwif->serialized = hwif->mate->serialized = 1;
1753                                 goto obsolete_option;
1754
1755                         case -1: /* "noprobe" */
1756                                 hwif->noprobe = 1;
1757                                 goto done;
1758
1759                         case 1: /* base */
1760                                 vals[1] = vals[0] + 0x206; /* default ctl */
1761                         case 2: /* base,ctl */
1762                                 vals[2] = 0;    /* default irq = probe for it */
1763                         case 3: /* base,ctl,irq */
1764                                 hwif->hw.irq = vals[2];
1765                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1766                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1767                                 hwif->irq      = vals[2];
1768                                 hwif->noprobe  = 0;
1769                                 hwif->chipset  = ide_forced;
1770                                 goto obsolete_option;
1771
1772                         case 0: goto bad_option;
1773                         default:
1774                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1775                                 return 1;
1776                 }
1777         }
1778 bad_option:
1779         printk(" -- BAD OPTION\n");
1780         return 1;
1781 obsolete_option:
1782         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1783         return 1;
1784 bad_hwif:
1785         printk("-- NOT SUPPORTED ON ide%d", hw);
1786 done:
1787         printk("\n");
1788         return 1;
1789 }
1790
1791 extern void pnpide_init(void);
1792 extern void h8300_ide_init(void);
1793
1794 /*
1795  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1796  */
1797 static void __init probe_for_hwifs (void)
1798 {
1799 #ifdef CONFIG_BLK_DEV_IDEPCI
1800         ide_scan_pcibus(ide_scan_direction);
1801 #endif /* CONFIG_BLK_DEV_IDEPCI */
1802
1803 #ifdef CONFIG_ETRAX_IDE
1804         {
1805                 extern void init_e100_ide(void);
1806                 init_e100_ide();
1807         }
1808 #endif /* CONFIG_ETRAX_IDE */
1809 #ifdef CONFIG_BLK_DEV_CMD640
1810         {
1811                 extern void ide_probe_for_cmd640x(void);
1812                 ide_probe_for_cmd640x();
1813         }
1814 #endif /* CONFIG_BLK_DEV_CMD640 */
1815 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1816         {
1817                 extern void pmac_ide_probe(void);
1818                 pmac_ide_probe();
1819         }
1820 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1821 #ifdef CONFIG_BLK_DEV_GAYLE
1822         {
1823                 extern void gayle_init(void);
1824                 gayle_init();
1825         }
1826 #endif /* CONFIG_BLK_DEV_GAYLE */
1827 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1828         {
1829                 extern void falconide_init(void);
1830                 falconide_init();
1831         }
1832 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1833 #ifdef CONFIG_BLK_DEV_MAC_IDE
1834         {
1835                 extern void macide_init(void);
1836                 macide_init();
1837         }
1838 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1839 #ifdef CONFIG_BLK_DEV_Q40IDE
1840         {
1841                 extern void q40ide_init(void);
1842                 q40ide_init();
1843         }
1844 #endif /* CONFIG_BLK_DEV_Q40IDE */
1845 #ifdef CONFIG_BLK_DEV_BUDDHA
1846         {
1847                 extern void buddha_init(void);
1848                 buddha_init();
1849         }
1850 #endif /* CONFIG_BLK_DEV_BUDDHA */
1851 #ifdef CONFIG_BLK_DEV_IDEPNP
1852         pnpide_init();
1853 #endif
1854 #ifdef CONFIG_H8300
1855         h8300_ide_init();
1856 #endif
1857 }
1858
1859 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1860 {
1861 #ifdef CONFIG_PROC_FS
1862         ide_add_proc_entries(drive->proc, driver->proc, drive);
1863 #endif
1864 }
1865
1866 EXPORT_SYMBOL(ide_register_subdriver);
1867
1868 /**
1869  *      ide_unregister_subdriver        -       disconnect drive from driver
1870  *      @drive: drive to unplug
1871  *      @driver: driver
1872  *
1873  *      Disconnect a drive from the driver it was attached to and then
1874  *      clean up the various proc files and other objects attached to it.
1875  *
1876  *      Takes ide_setting_sem and ide_lock.
1877  *      Caller must hold none of the locks.
1878  */
1879
1880 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1881 {
1882         unsigned long flags;
1883         
1884         down(&ide_setting_sem);
1885         spin_lock_irqsave(&ide_lock, flags);
1886 #ifdef CONFIG_PROC_FS
1887         ide_remove_proc_entries(drive->proc, driver->proc);
1888 #endif
1889         auto_remove_settings(drive);
1890         spin_unlock_irqrestore(&ide_lock, flags);
1891         up(&ide_setting_sem);
1892 }
1893
1894 EXPORT_SYMBOL(ide_unregister_subdriver);
1895
1896 /*
1897  * Probe module
1898  */
1899
1900 EXPORT_SYMBOL(ide_lock);
1901
1902 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1903 {
1904         return 1;
1905 }
1906
1907 struct bus_type ide_bus_type = {
1908         .name           = "ide",
1909         .match          = ide_bus_match,
1910         .suspend        = generic_ide_suspend,
1911         .resume         = generic_ide_resume,
1912 };
1913
1914 EXPORT_SYMBOL_GPL(ide_bus_type);
1915
1916 /*
1917  * This is gets invoked once during initialization, to set *everything* up
1918  */
1919 static int __init ide_init(void)
1920 {
1921         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1922         devfs_mk_dir("ide");
1923         system_bus_speed = ide_system_bus_speed();
1924
1925         bus_register(&ide_bus_type);
1926
1927         init_ide_data();
1928
1929 #ifdef CONFIG_PROC_FS
1930         proc_ide_root = proc_mkdir("ide", NULL);
1931 #endif
1932
1933 #ifdef CONFIG_BLK_DEV_ALI14XX
1934         if (probe_ali14xx)
1935                 (void)ali14xx_init();
1936 #endif
1937 #ifdef CONFIG_BLK_DEV_UMC8672
1938         if (probe_umc8672)
1939                 (void)umc8672_init();
1940 #endif
1941 #ifdef CONFIG_BLK_DEV_DTC2278
1942         if (probe_dtc2278)
1943                 (void)dtc2278_init();
1944 #endif
1945 #ifdef CONFIG_BLK_DEV_HT6560B
1946         if (probe_ht6560b)
1947                 (void)ht6560b_init();
1948 #endif
1949 #ifdef CONFIG_BLK_DEV_QD65XX
1950         if (probe_qd65xx)
1951                 (void)qd65xx_init();
1952 #endif
1953
1954         initializing = 1;
1955         /* Probe for special PCI and other "known" interface chipsets. */
1956         probe_for_hwifs();
1957         initializing = 0;
1958
1959 #ifdef CONFIG_PROC_FS
1960         proc_ide_create();
1961 #endif
1962         return 0;
1963 }
1964
1965 #ifdef MODULE
1966 static char *options = NULL;
1967 module_param(options, charp, 0);
1968 MODULE_LICENSE("GPL");
1969
1970 static void __init parse_options (char *line)
1971 {
1972         char *next = line;
1973
1974         if (line == NULL || !*line)
1975                 return;
1976         while ((line = next) != NULL) {
1977                 if ((next = strchr(line,' ')) != NULL)
1978                         *next++ = 0;
1979                 if (!ide_setup(line))
1980                         printk (KERN_INFO "Unknown option '%s'\n", line);
1981         }
1982 }
1983
1984 int init_module (void)
1985 {
1986         parse_options(options);
1987         return ide_init();
1988 }
1989
1990 void cleanup_module (void)
1991 {
1992         int index;
1993
1994         for (index = 0; index < MAX_HWIFS; ++index)
1995                 ide_unregister(index);
1996
1997 #ifdef CONFIG_PROC_FS
1998         proc_ide_destroy();
1999 #endif
2000         devfs_remove("ide");
2001
2002         bus_unregister(&ide_bus_type);
2003 }
2004
2005 #else /* !MODULE */
2006
2007 __setup("", ide_setup);
2008
2009 module_init(ide_init);
2010
2011 #endif /* MODULE */