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*/
1 /*
2 * linux/drivers/block/ide.h
3 *
4 * Copyright (C) 1994, 1995 Linus Torvalds & authors
5 */
6
7 #include <linux/config.h>
8
9 /*
10 * This is the multiple IDE interface driver, as evolved from hd.c.
11 * It supports up to four IDE interfaces, on one or more IRQs (usually 14 & 15).
12 * There can be up to two drives per interface, as per the ATA-2 spec.
13 *
14 * Primary i/f: ide0: major=3; (hda) minor=0; (hdb) minor=64
15 * Secondary i/f: ide1: major=22; (hdc or hd1a) minor=0; (hdd or hd1b) minor=64
16 * Tertiary i/f: ide2: major=33; (hde) minor=0; (hdf) minor=64
17 * Quaternary i/f: ide3: major=34; (hdg) minor=0; (hdh) minor=64
18 */
19
20 /******************************************************************************
21 * IDE driver configuration options (play with these as desired):
22 *
23 * REALLY_SLOW_IO can be defined in ide.c and ide-cd.c, if necessary
24 */
25 #undef REALLY_FAST_IO /* define if ide ports are perfect */
26 #define INITIAL_MULT_COUNT 0 /* off=0; on=2,4,8,16,32, etc.. */
27
28 #ifndef DISK_RECOVERY_TIME /* off=0; on=access_delay_time */
29 #define DISK_RECOVERY_TIME 0 /* for hardware that needs it */
30 #endif
31 #ifndef OK_TO_RESET_CONTROLLER /* 1 needed for good error recovery */
32 #define OK_TO_RESET_CONTROLLER 1 /* 0 for use with AH2372A/B interface */
33 #endif
34 #ifndef FAKE_FDISK_FOR_EZDRIVE /* 1 to help linux fdisk with EZDRIVE */
35 #define FAKE_FDISK_FOR_EZDRIVE 1 /* 0 to reduce kernel size */
36 #endif
37 #ifndef SUPPORT_RZ1000 /* 1 to support RZ1000 chipset */
38 #define SUPPORT_RZ1000 1 /* 0 to reduce kernel size */
39 #endif
40 #ifndef SUPPORT_CMD640 /* 1 to support CMD640 chipset */
41 #define SUPPORT_CMD640 1 /* 0 to reduce kernel size */
42 #endif
43 #ifndef SUPPORT_UMC8672 /* 1 to support UMC8672 chipset */
44 #define SUPPORT_UMC8672 1 /* 0 to reduce kernel size */
45 #endif
46 #ifndef SUPPORT_HT6560B /* 1 to support HT6560B chipset */
47 #define SUPPORT_HT6560B 1 /* 0 to reduce kernel size */
48 #endif
49 #ifndef SUPPORT_QD6580 /* 1 to support QD6580 chipset */
50 #define SUPPORT_QD6580 1 /* 0 to reduce kernel size */
51 #endif
52 #ifndef SUPPORT_DTC2278 /* 1 to support DTC2278 chipset */
53 #define SUPPORT_DTC2278 1 /* 0 to reduce kernel size */
54 #ifndef SET_DTC2278_MODE4
55 #define SET_DTC2278_MODE4 0 /* 1 to init primary i/f for PIO mode4 */
56 #endif
57 #endif
58 #ifndef FANCY_STATUS_DUMPS /* 1 for human-readable drive errors */
59 #define FANCY_STATUS_DUMPS 1 /* 0 to reduce kernel size */
60 #endif
61
62 /*
63 * IDE_DRIVE_CMD is used to implement many features of the hdparm utility
64 */
65 #define IDE_DRIVE_CMD 99 /* (magic) undef to reduce kernel size*/
66
67 /*
68 * "No user-serviceable parts" beyond this point :)
69 *****************************************************************************/
70
71 typedef unsigned char byte; /* used everywhere */
72
73 /*
74 * Probably not wise to fiddle with these
75 */
76 #define ERROR_MAX 8 /* Max read/write errors per sector */
77 #define ERROR_RESET 3 /* Reset controller every 4th retry */
78 #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
79
80 /*
81 * Ensure that various configuration flags have compatible settings
82 */
83 #ifdef REALLY_SLOW_IO
84 #undef REALLY_FAST_IO
85 #endif
86
87 /*
88 * Definitions for accessing IDE controller registers
89 */
90
91 #define HWIF(drive) ((ide_hwif_t *)drive->hwif)
92 #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
93
94 #define IDE_DATA_OFFSET (0)
95 #define IDE_ERROR_OFFSET (1)
96 #define IDE_NSECTOR_OFFSET (2)
97 #define IDE_SECTOR_OFFSET (3)
98 #define IDE_LCYL_OFFSET (4)
99 #define IDE_HCYL_OFFSET (5)
100 #define IDE_SELECT_OFFSET (6)
101 #define IDE_STATUS_OFFSET (7)
102 #define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET
103 #define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET
104
105 #define IDE_DATA_REG (HWIF(drive)->io_base+IDE_DATA_OFFSET)
106 #define IDE_ERROR_REG (HWIF(drive)->io_base+IDE_ERROR_OFFSET)
107 #define IDE_NSECTOR_REG (HWIF(drive)->io_base+IDE_NSECTOR_OFFSET)
108 #define IDE_SECTOR_REG (HWIF(drive)->io_base+IDE_SECTOR_OFFSET)
109 #define IDE_LCYL_REG (HWIF(drive)->io_base+IDE_LCYL_OFFSET)
110 #define IDE_HCYL_REG (HWIF(drive)->io_base+IDE_HCYL_OFFSET)
111 #define IDE_SELECT_REG (HWIF(drive)->io_base+IDE_SELECT_OFFSET)
112 #define IDE_STATUS_REG (HWIF(drive)->io_base+IDE_STATUS_OFFSET)
113 #define IDE_CONTROL_REG (HWIF(drive)->ctl_port)
114 #define IDE_FEATURE_REG IDE_ERROR_REG
115 #define IDE_COMMAND_REG IDE_STATUS_REG
116 #define IDE_ALTSTATUS_REG IDE_CONTROL_REG
117
118 #ifdef REALLY_FAST_IO
119 #define OUT_BYTE(b,p) outb((b),p)
120 #define IN_BYTE(p) (byte)inb(p)
121 #else
122 #define OUT_BYTE(b,p) outb_p((b),p)
123 #define IN_BYTE(p) (byte)inb_p(p)
124 #endif /* REALLY_FAST_IO */
125
126 #define GET_ERR() IN_BYTE(IDE_ERROR_REG)
127 #define GET_STAT() IN_BYTE(IDE_STATUS_REG)
128 #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
129 #define BAD_R_STAT (BUSY_STAT | ERR_STAT)
130 #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
131 #define BAD_STAT (BAD_R_STAT | DRQ_STAT)
132 #define DRIVE_READY (READY_STAT | SEEK_STAT)
133 #define DATA_READY (DRIVE_READY | DRQ_STAT)
134
135 /*
136 * Some more useful definitions
137 */
138 #define IDE_MAJOR_NAME "ide" /* the same for all i/f; see also genhd.c */
139 #define MAJOR_NAME IDE_MAJOR_NAME
140 #define PARTN_BITS 6 /* number of minor dev bits for partitions */
141 #define PARTN_MASK ((1<<PARTN_BITS)-1) /* a useful bit mask */
142 #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
143 #define MAX_HWIFS 4 /* an arbitrary, but realistic limit */
144 #define SECTOR_WORDS (512 / 4) /* number of 32bit words per sector */
145
146 /*
147 * Timeouts for various operations:
148 */
149 #define WAIT_DRQ (5*HZ/100) /* 50msec - spec allows up to 20ms */
150 #define WAIT_READY (3*HZ/100) /* 30msec - should be instantaneous */
151 #define WAIT_PIDENTIFY (1*HZ) /* 1sec - should be less than 3ms (?) */
152 #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
153 #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
154
155 #ifdef CONFIG_BLK_DEV_IDETAPE
156 #include "ide-tape.h"
157 #endif /* CONFIG_BLK_DEV_IDETAPE */
158
159 #ifdef CONFIG_BLK_DEV_IDECD
160
161 struct atapi_request_sense {
162 unsigned char error_code : 7;
163 unsigned char valid : 1;
164 byte reserved1;
165 unsigned char sense_key : 4;
166 unsigned char reserved2 : 1;
167 unsigned char ili : 1;
168 unsigned char reserved3 : 2;
169 byte info[4];
170 byte sense_len;
171 byte command_info[4];
172 byte asc;
173 byte ascq;
174 byte fru;
175 byte sense_key_specific[3];
176 };
177
178 struct packet_command {
179 char *buffer;
180 int buflen;
181 int stat;
182 struct atapi_request_sense *sense_data;
183 unsigned char c[12];
184 };
185
186 /* Space to hold the disk TOC. */
187
188 #define MAX_TRACKS 99
189 struct atapi_toc_header {
190 unsigned short toc_length;
191 byte first_track;
192 byte last_track;
193 };
194
195 struct atapi_toc_entry {
196 byte reserved1;
197 unsigned control : 4;
198 unsigned adr : 4;
199 byte track;
200 byte reserved2;
201 unsigned lba;
202 };
203
204 struct atapi_toc {
205 int last_session_lba;
206 int xa_flag;
207 unsigned capacity;
208 struct atapi_toc_header hdr;
209 struct atapi_toc_entry ent[MAX_TRACKS+1]; /* One extra for the leadout. */
210 };
211
212 /* Extra per-device info for cdrom drives. */
213 struct cdrom_info {
214
215 /* Buffer for table of contents. NULL if we haven't allocated
216 a TOC buffer for this device yet. */
217
218 struct atapi_toc *toc;
219
220 /* Sector buffer. If a read request wants only the first part of a cdrom
221 block, we cache the rest of the block here, in the expectation that that
222 data is going to be wanted soon. SECTOR_BUFFERED is the number of the
223 first buffered sector, and NSECTORS_BUFFERED is the number of sectors
224 in the buffer. Before the buffer is allocated, we should have
225 SECTOR_BUFFER == NULL and NSECTORS_BUFFERED == 0. */
226
227 unsigned long sector_buffered;
228 unsigned long nsectors_buffered;
229 char *sector_buffer;
230
231 /* The result of the last successful request sense command
232 on this device. */
233 struct atapi_request_sense sense_data;
234 };
235
236 #endif /* CONFIG_BLK_DEV_IDECD */
237
238 /*
239 * Now for the data we need to maintain per-drive: ide_drive_t
240 */
241
242 typedef enum {ide_disk, ide_cdrom, ide_tape} ide_media_t;
243
244 typedef union {
245 unsigned all : 8; /* all of the bits together */
246 struct {
247 unsigned set_geometry : 1; /* respecify drive geometry */
248 unsigned recalibrate : 1; /* seek to cyl 0 */
249 unsigned set_multmode : 1; /* set multmode count */
250 unsigned reserved : 5; /* unused */
251 } b;
252 } special_t;
253
254 typedef union {
255 unsigned all : 8; /* all of the bits together */
256 struct {
257 unsigned head : 4; /* always zeros here */
258 unsigned unit : 1; /* drive select number, 0 or 1 */
259 unsigned bit5 : 1; /* always 1 */
260 unsigned lba : 1; /* using LBA instead of CHS */
261 unsigned bit7 : 1; /* always 1 */
262 } b;
263 } select_t;
264
265 typedef struct ide_drive_s {
266 special_t special; /* special action flags */
267 #if FAKE_FDISK_FOR_EZDRIVE
268 unsigned ezdrive : 1; /* flag: partitioned with ezdrive */
269 #endif /* FAKE_FDISK_FOR_EZDRIVE */
270 unsigned present : 1; /* drive is physically present */
271 unsigned noprobe : 1; /* from: hdx=noprobe */
272 unsigned keep_settings : 1; /* restore settings after drive reset */
273 unsigned busy : 1; /* currently doing revalidate_disk() */
274 unsigned vlb_32bit : 1; /* use 32bit in/out for data */
275 unsigned vlb_sync : 1; /* needed for some 32bit chip sets */
276 unsigned removeable : 1; /* 1 if need to do check_media_change */
277 unsigned using_dma : 1; /* disk is using dma for read/write */
278 unsigned unmask : 1; /* flag: okay to unmask other irqs */
279 ide_media_t media; /* disk, cdrom, tape */
280 select_t select; /* basic drive/head select reg value */
281 void *hwif; /* actually (ide_hwif_t *) */
282 byte ctl; /* "normal" value for IDE_CONTROL_REG */
283 byte ready_stat; /* min status value for drive ready */
284 byte mult_count; /* current multiple sector setting */
285 byte mult_req; /* requested multiple sector setting */
286 byte chipset; /* interface chipset access method */
287 byte bad_wstat; /* used for ignoring WRERR_STAT */
288 byte sect0; /* offset of first sector for DM6:DDO */
289 byte usage; /* current "open()" count for drive */
290 byte head; /* "real" number of heads */
291 byte sect; /* "real" sectors per track */
292 byte bios_head; /* BIOS/fdisk/LILO number of heads */
293 byte bios_sect; /* BIOS/fdisk/LILO sectors per track */
294 unsigned short bios_cyl; /* BIOS/fdisk/LILO number of cyls */
295 unsigned short cyl; /* "real" number of cyls */
296 struct wait_queue *wqueue; /* used to wait for drive in open() */
297 struct hd_driveid *id; /* drive model identification info */
298 struct hd_struct *part; /* drive partition table */
299 char name[4]; /* drive name, such as "hda" */
300 #ifdef CONFIG_BLK_DEV_IDECD
301 struct cdrom_info cdrom_info; /* from ide-cd.c */
302 #endif /* CONFIG_BLK_DEV_IDECD */
303
304 #ifdef CONFIG_BLK_DEV_IDETAPE /* ide-tape specific data */
305
306 /*
307 * Most of our global data which we need to save even as we leave the
308 * driver due to an interrupt or a timer event is stored here.
309 *
310 * Additional global variables which provide the link between the
311 * character device interface to this structure are defined in
312 * ide-tape.c
313 */
314
315 idetape_tape_t tape;
316
317 #endif /* CONFIG_BLK_DEV_IDETAPE */
318
319 } ide_drive_t;
320
321 /*
322 * An ide_dmaproc_t() initiates/aborts DMA read/write operations on a drive.
323 *
324 * The caller is assumed to have selected the drive and programmed the drive's
325 * sector address using CHS or LBA. All that remains is to prepare for DMA
326 * and then issue the actual read/write DMA/PIO command to the drive.
327 *
328 * Returns 0 if all went well.
329 * Returns 1 if DMA read/write could not be started, in which case the caller
330 * should either try again later, or revert to PIO for the current request.
331 */
332 typedef enum {ide_dma_read = 0, ide_dma_write = 1, ide_dma_abort = 2, ide_dma_check = 3} ide_dma_action_t;
333 typedef int (ide_dmaproc_t)(ide_dma_action_t, ide_drive_t *);
334
335 typedef struct hwif_s {
336 struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
337 void *hwgroup; /* actually (ide_hwgroup_t *) */
338 unsigned short io_base; /* base io port addr */
339 unsigned short ctl_port; /* usually io_base+0x206 */
340 ide_drive_t drives[MAX_DRIVES]; /* drive info */
341 struct gendisk *gd; /* gendisk structure */
342 ide_dmaproc_t *dmaproc; /* dma read/write/abort routine */
343 unsigned long *dmatable; /* dma physical region descriptor table */
344 unsigned short dma_base; /* base addr for dma ports (triton) */
345 byte irq; /* our irq number */
346 byte major; /* our major number */
347 byte select; /* pri/sec hwif select for ht6560b */
348 char name[5]; /* name of interface, eg. "ide0" */
349 unsigned noprobe : 1; /* don't probe for this interface */
350 unsigned present : 1; /* this interface exists */
351 #if (DISK_RECOVERY_TIME > 0)
352 unsigned long last_time; /* time when previous rq was done */
353 #endif
354 #ifdef CONFIG_BLK_DEV_IDECD
355 struct request request_sense_request; /* from ide-cd.c */
356 struct packet_command request_sense_pc; /* from ide-cd.c */
357 #endif /* CONFIG_BLK_DEV_IDECD */
358 #ifdef CONFIG_BLK_DEV_IDETAPE
359 ide_drive_t *tape_drive; /* Pointer to the tape on this interface */
360 #endif /* CONFIG_BLK_DEV_IDETAPE */
361 } ide_hwif_t;
362
363 /*
364 * internal ide interrupt handler type
365 */
366 typedef void (ide_handler_t)(ide_drive_t *);
367
368 typedef struct hwgroup_s {
369 ide_handler_t *handler;/* irq handler, if active */
370 ide_drive_t *drive; /* current drive */
371 ide_hwif_t *hwif; /* ptr to current hwif in linked-list */
372 struct request *rq; /* current request */
373 struct timer_list timer; /* failsafe timer */
374 struct request wrq; /* local copy of current write rq */
375 unsigned long poll_timeout; /* timeout value during long polls */
376 } ide_hwgroup_t;
377
378 /*
379 * One final include file, which references some of the data/defns from above
380 */
381 #define IDE_DRIVER /* "parameter" for blk.h */
382 #include <linux/blk.h>
383
384 #if (DISK_RECOVERY_TIME > 0)
385 void ide_set_recovery_timer (ide_hwif_t *);
386 #define SET_RECOVERY_TIMER(drive) ide_set_recovery_timer (drive)
387 #else
388 #define SET_RECOVERY_TIMER(drive)
389 #endif
390
391 /*
392 * This is used for (nearly) all data transfers from the IDE interface
393 */
394 void ide_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount);
395
396 /*
397 * This is used for (nearly) all data transfers to the IDE interface
398 */
399 void ide_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount);
400
401 /*
402 * This is used on exit from the driver, to designate the next irq handler
403 * and also to start the safety timer.
404 */
405 void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout);
406
407 /*
408 * Error reporting, in human readable form (luxurious, but a memory hog).
409 */
410 byte ide_dump_status (ide_drive_t *drive, const char *msg, byte stat);
411
412 /*
413 * ide_error() takes action based on the error returned by the controller.
414 * The calling function must return afterwards, to restart the request.
415 */
416 void ide_error (ide_drive_t *drive, const char *msg, byte stat);
417
418 /*
419 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
420 * removing leading/trailing blanks and compressing internal blanks.
421 * It is primarily used to tidy up the model name/number fields as
422 * returned by the WIN_[P]IDENTIFY commands.
423 */
424 void ide_fixstring (byte *s, const int bytecount, const int byteswap);
425
426 /*
427 * This routine busy-waits for the drive status to be not "busy".
428 * It then checks the status for all of the "good" bits and none
429 * of the "bad" bits, and if all is okay it returns 0. All other
430 * cases return 1 after invoking ide_error() -- caller should return.
431 *
432 */
433 int ide_wait_stat (ide_drive_t *drive, byte good, byte bad, unsigned long timeout);
434
435 /*
436 * This is called from genhd.c to correct DiskManager/EZ-Drive geometries
437 */
438 int ide_xlate_1024(kdev_t, int, const char *);
439
440 /*
441 * Start a reset operation for an IDE interface.
442 * The caller should return immediately after invoking this.
443 */
444 void ide_do_reset (ide_drive_t *);
445
446 /*
447 * This function is intended to be used prior to invoking ide_do_drive_cmd().
448 */
449 void ide_init_drive_cmd (struct request *rq);
450
451 /*
452 * "action" parameter type for ide_do_drive_cmd() below.
453 */
454 typedef enum
455 {ide_wait, /* insert rq at end of list, and wait for it */
456 ide_next, /* insert rq immediately after current request */
457 ide_preempt, /* insert rq in front of current request */
458 ide_end} /* insert rq at end of list, but don't wait for it */
459 ide_action_t;
460
461 /*
462 * This function issues a special IDE device request
463 * onto the request queue.
464 *
465 * If action is ide_wait, then then rq is queued at the end of
466 * the request queue, and the function sleeps until it has been
467 * processed. This is for use when invoked from an ioctl handler.
468 *
469 * If action is ide_preempt, then the rq is queued at the head of
470 * the request queue, displacing the currently-being-processed
471 * request and this function returns immediately without waiting
472 * for the new rq to be completed. This is VERY DANGEROUS, and is
473 * intended for careful use by the ATAPI tape/cdrom driver code.
474 *
475 * If action is ide_next, then the rq is queued immediately after
476 * the currently-being-processed-request (if any), and the function
477 * returns without waiting for the new rq to be completed. As above,
478 * This is VERY DANGEROUS, and is intended for careful use by the
479 * ATAPI tape/cdrom driver code.
480 *
481 * If action is ide_end, then the rq is queued at the end of the
482 * request queue, and the function returns immediately without waiting
483 * for the new rq to be completed. This is again intended for careful
484 * use by the ATAPI tape/cdrom driver code. (Currently used by ide-tape.c,
485 * when operating in the pipelined operation mode).
486 */
487 int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t action);
488
489 /*
490 * Clean up after success/failure of an explicit drive cmd.
491 * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_CMD).
492 */
493 void ide_end_drive_cmd (ide_drive_t *drive, byte stat, byte err);
494
495 #ifdef CONFIG_BLK_DEV_IDECD
496 /*
497 * These are routines in ide-cd.c invoked from ide.c
498 */
499 void ide_do_rw_cdrom (ide_drive_t *, unsigned long);
500 int ide_cdrom_ioctl (ide_drive_t *, struct inode *, struct file *, unsigned int, unsigned long);
501 int ide_cdrom_check_media_change (ide_drive_t *);
502 int ide_cdrom_open (struct inode *, struct file *, ide_drive_t *);
503 void ide_cdrom_release (struct inode *, struct file *, ide_drive_t *);
504 void ide_cdrom_setup (ide_drive_t *);
505 #endif /* CONFIG_BLK_DEV_IDECD */
506
507 #ifdef CONFIG_BLK_DEV_IDETAPE
508
509 /*
510 * Functions in ide-tape.c which are invoked from ide.c:
511 */
512
513 /*
514 * idetape_identify_device is called during device probing stage to
515 * probe for an ide atapi tape drive and to initialize global variables
516 * in ide-tape.c which provide the link between the character device
517 * and the correspoding block device.
518 *
519 * Returns 1 if an ide tape was detected and is supported.
520 * Returns 0 otherwise.
521 */
522
523 int idetape_identify_device (ide_drive_t *drive,struct hd_driveid *id);
524
525 /*
526 * idetape_setup is called a bit later than idetape_identify_device,
527 * during the search for disk partitions, to initialize various tape
528 * state variables in ide_drive_t *drive.
529 */
530
531 void idetape_setup (ide_drive_t *drive);
532
533 /*
534 * idetape_do_request is our request function. It is called by ide.c
535 * to process a new request.
536 */
537
538 void idetape_do_request (ide_drive_t *drive, struct request *rq, unsigned long block);
539
540 /*
541 * Block device interface functions.
542 */
543
544 int idetape_blkdev_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file,
545 unsigned int cmd, unsigned long arg);
546 int idetape_blkdev_open (struct inode *inode, struct file *filp, ide_drive_t *drive);
547 void idetape_blkdev_release (struct inode *inode, struct file *filp, ide_drive_t *drive);
548
549 /*
550 * idetape_register_chrdev initializes the character device interface to
551 * the ide tape drive.
552 */
553
554 void idetape_register_chrdev (void);
555
556 /*
557 * The following function is called to re-insert a postponed tape
558 * request into the request queue.
559 */
560
561 void idetape_put_back_postponed_request (ide_drive_t *drive);
562
563 #endif /* CONFIG_BLK_DEV_IDETAPE */
564
565 #ifdef CONFIG_BLK_DEV_TRITON
566 void ide_init_triton (byte, byte);
567 #endif /* CONFIG_BLK_DEV_TRITON */
568
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