4 * linux/drivers/block/ide.h
6 * Copyright (C) 1994-1998 Linus Torvalds & authors
9 #include <linux/config.h>
10 #include <linux/init.h>
11 #include <linux/ioport.h>
12 #include <linux/hdreg.h>
13 #include <linux/hdsmart.h>
14 #include <linux/blkdev.h>
15 #include <linux/proc_fs.h>
16 #include <asm/hdreg.h>
19 * This is the multiple IDE interface driver, as evolved from hd.c.
20 * It supports up to four IDE interfaces, on one or more IRQs (usually 14 & 15).
21 * There can be up to two drives per interface, as per the ATA-2 spec.
23 * Primary i/f: ide0: major=3; (hda) minor=0; (hdb) minor=64
24 * Secondary i/f: ide1: major=22; (hdc or hd1a) minor=0; (hdd or hd1b) minor=64
25 * Tertiary i/f: ide2: major=33; (hde) minor=0; (hdf) minor=64
26 * Quaternary i/f: ide3: major=34; (hdg) minor=0; (hdh) minor=64
29 /******************************************************************************
30 * IDE driver configuration options (play with these as desired):
32 * REALLY_SLOW_IO can be defined in ide.c and ide-cd.c, if necessary
34 #undef REALLY_FAST_IO /* define if ide ports are perfect */
35 #define INITIAL_MULT_COUNT 0 /* off=0; on=2,4,8,16,32, etc.. */
37 #ifndef SUPPORT_SLOW_DATA_PORTS /* 1 to support slow data ports */
38 #define SUPPORT_SLOW_DATA_PORTS 1 /* 0 to reduce kernel size */
40 #ifndef SUPPORT_VLB_SYNC /* 1 to support weird 32-bit chips */
41 #define SUPPORT_VLB_SYNC 1 /* 0 to reduce kernel size */
43 #ifndef DISK_RECOVERY_TIME /* off=0; on=access_delay_time */
44 #define DISK_RECOVERY_TIME 0 /* for hardware that needs it */
46 #ifndef OK_TO_RESET_CONTROLLER /* 1 needed for good error recovery */
47 #define OK_TO_RESET_CONTROLLER 1 /* 0 for use with AH2372A/B interface */
49 #ifndef FAKE_FDISK_FOR_EZDRIVE /* 1 to help linux fdisk with EZDRIVE */
50 #define FAKE_FDISK_FOR_EZDRIVE 1 /* 0 to reduce kernel size */
52 #ifndef FANCY_STATUS_DUMPS /* 1 for human-readable drive errors */
53 #define FANCY_STATUS_DUMPS 1 /* 0 to reduce kernel size */
56 #ifdef CONFIG_BLK_DEV_CMD640
57 #if 0 /* change to 1 when debugging cmd640 problems */
58 void cmd640_dump_regs (void);
59 #define CMD640_DUMP_REGS cmd640_dump_regs() /* for debugging cmd640 chipset */
61 #endif /* CONFIG_BLK_DEV_CMD640 */
64 * IDE_DRIVE_CMD is used to implement many features of the hdparm utility
66 #define IDE_DRIVE_CMD 99 /* (magic) undef to reduce kernel size*/
69 * "No user-serviceable parts" beyond this point :)
70 *****************************************************************************/
72 typedef unsigned char byte
; /* used everywhere */
75 * Probably not wise to fiddle with these
77 #define ERROR_MAX 8 /* Max read/write errors per sector */
78 #define ERROR_RESET 3 /* Reset controller every 4th retry */
79 #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
82 * Ensure that various configuration flags have compatible settings
88 #define HWIF(drive) ((ide_hwif_t *)((drive)->hwif))
89 #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
92 * Definitions for accessing IDE controller registers
94 #define IDE_NR_PORTS (10)
96 #define IDE_DATA_OFFSET (0)
97 #define IDE_ERROR_OFFSET (1)
98 #define IDE_NSECTOR_OFFSET (2)
99 #define IDE_SECTOR_OFFSET (3)
100 #define IDE_LCYL_OFFSET (4)
101 #define IDE_HCYL_OFFSET (5)
102 #define IDE_SELECT_OFFSET (6)
103 #define IDE_STATUS_OFFSET (7)
104 #define IDE_CONTROL_OFFSET (8)
105 #define IDE_IRQ_OFFSET (9)
107 #define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET
108 #define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET
110 #define IDE_DATA_REG (HWIF(drive)->io_ports[IDE_DATA_OFFSET])
111 #define IDE_ERROR_REG (HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
112 #define IDE_NSECTOR_REG (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
113 #define IDE_SECTOR_REG (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
114 #define IDE_LCYL_REG (HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
115 #define IDE_HCYL_REG (HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
116 #define IDE_SELECT_REG (HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
117 #define IDE_STATUS_REG (HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
118 #define IDE_CONTROL_REG (HWIF(drive)->io_ports[IDE_CONTROL_OFFSET])
119 #define IDE_IRQ_REG (HWIF(drive)->io_ports[IDE_IRQ_OFFSET])
121 #define IDE_FEATURE_REG IDE_ERROR_REG
122 #define IDE_COMMAND_REG IDE_STATUS_REG
123 #define IDE_ALTSTATUS_REG IDE_CONTROL_REG
124 #define IDE_IREASON_REG IDE_NSECTOR_REG
125 #define IDE_BCOUNTL_REG IDE_LCYL_REG
126 #define IDE_BCOUNTH_REG IDE_HCYL_REG
128 #ifdef REALLY_FAST_IO
129 #define OUT_BYTE(b,p) outb((b),(p))
130 #define IN_BYTE(p) (byte)inb(p)
132 #define OUT_BYTE(b,p) outb_p((b),(p))
133 #define IN_BYTE(p) (byte)inb_p(p)
134 #endif /* REALLY_FAST_IO */
136 #define GET_ERR() IN_BYTE(IDE_ERROR_REG)
137 #define GET_STAT() IN_BYTE(IDE_STATUS_REG)
138 #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
139 #define BAD_R_STAT (BUSY_STAT | ERR_STAT)
140 #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
141 #define BAD_STAT (BAD_R_STAT | DRQ_STAT)
142 #define DRIVE_READY (READY_STAT | SEEK_STAT)
143 #define DATA_READY (DRQ_STAT)
146 * Some more useful definitions
148 #define IDE_MAJOR_NAME "ide" /* the same for all i/f; see also genhd.c */
149 #define MAJOR_NAME IDE_MAJOR_NAME
150 #define PARTN_BITS 6 /* number of minor dev bits for partitions */
151 #define PARTN_MASK ((1<<PARTN_BITS)-1) /* a useful bit mask */
152 #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
153 #define SECTOR_WORDS (512 / 4) /* number of 32bit words per sector */
154 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
155 #define IDE_MIN(a,b) ((a)<(b) ? (a):(b))
156 #define IDE_MAX(a,b) ((a)>(b) ? (a):(b))
159 * Timeouts for various operations:
161 #define WAIT_DRQ (5*HZ/100) /* 50msec - spec allows up to 20ms */
163 #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
165 #define WAIT_READY (3*HZ/100) /* 30msec - should be instantaneous */
166 #endif /* CONFIG_APM */
167 #define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?)
168 if all ATAPI CD is closed at boot */
169 #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
170 #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
171 #define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
173 #define SELECT_DRIVE(hwif,drive) \
175 if (hwif->selectproc) \
176 hwif->selectproc(drive); \
177 OUT_BYTE((drive)->select.all, hwif->io_ports[IDE_SELECT_OFFSET]); \
181 * Check for an interrupt and acknowledge the interrupt status
184 typedef int (ide_ack_intr_t
)(struct hwif_s
*);
187 * Structure to hold all information about the location of this port
189 typedef struct hw_regs_s
{
190 ide_ioreg_t io_ports
[IDE_NR_PORTS
]; /* task file registers */
191 int irq
; /* our irq number */
192 ide_ack_intr_t
*ack_intr
; /* acknowledge interrupt */
193 void *priv
; /* interface specific data */
197 * Register new hardware with ide
199 int ide_register_hw(hw_regs_t
*hw
, struct hwif_s
**hwifp
);
202 * Set up hw_regs_t structure before calling ide_register_hw (optional)
204 void ide_setup_ports( hw_regs_t
*hw
,
209 ide_ack_intr_t
*ack_intr
,
215 * Now for the data we need to maintain per-drive: ide_drive_t
218 #define ide_scsi 0x21
219 #define ide_disk 0x20
220 #define ide_optical 0x7
221 #define ide_cdrom 0x5
223 #define ide_floppy 0x0
226 unsigned all
: 8; /* all of the bits together */
228 unsigned set_geometry
: 1; /* respecify drive geometry */
229 unsigned recalibrate
: 1; /* seek to cyl 0 */
230 unsigned set_multmode
: 1; /* set multmode count */
231 unsigned set_tune
: 1; /* tune interface for drive */
232 unsigned reserved
: 4; /* unused */
236 typedef struct ide_drive_s
{
237 struct request
*queue
; /* request queue */
238 struct ide_drive_s
*next
; /* circular list of hwgroup drives */
239 unsigned long sleep
; /* sleep until this time */
240 unsigned long service_start
; /* time we started last request */
241 unsigned long service_time
; /* service time of last request */
242 special_t special
; /* special action flags */
243 byte keep_settings
; /* restore settings after drive reset */
244 byte using_dma
; /* disk is using dma for read/write */
245 byte waiting_for_dma
; /* dma currently in progress */
246 byte unmask
; /* flag: okay to unmask other irqs */
247 byte slow
; /* flag: slow data port */
248 byte bswap
; /* flag: byte swap data */
249 byte dsc_overlap
; /* flag: DSC overlap */
250 byte nice1
; /* flag: give potential excess bandwidth */
251 unsigned present
: 1; /* drive is physically present */
252 unsigned noprobe
: 1; /* from: hdx=noprobe */
253 unsigned busy
: 1; /* currently doing revalidate_disk() */
254 unsigned removable
: 1; /* 1 if need to do check_media_change */
255 unsigned forced_geom
: 1; /* 1 if hdx=c,h,s was given at boot */
256 unsigned no_unmask
: 1; /* disallow setting unmask bit */
257 unsigned no_io_32bit
: 1; /* disallow enabling 32bit I/O */
258 unsigned nobios
: 1; /* flag: do not probe bios for drive */
259 unsigned revalidate
: 1; /* request revalidation */
260 unsigned atapi_overlap
: 1; /* flag: ATAPI overlap (not supported) */
261 unsigned nice0
: 1; /* flag: give obvious excess bandwidth */
262 unsigned nice2
: 1; /* flag: give a share in our own bandwidth */
263 unsigned doorlocking
: 1; /* flag: for removable only: door lock/unlock works */
264 unsigned autotune
: 2; /* 1=autotune, 2=noautotune, 0=default */
265 #if FAKE_FDISK_FOR_EZDRIVE
266 unsigned remap_0_to_1
: 1; /* flag: partitioned with ezdrive */
267 #endif /* FAKE_FDISK_FOR_EZDRIVE */
268 byte media
; /* disk, cdrom, tape, floppy, ... */
269 select_t select
; /* basic drive/head select reg value */
270 byte ctl
; /* "normal" value for IDE_CONTROL_REG */
271 byte ready_stat
; /* min status value for drive ready */
272 byte mult_count
; /* current multiple sector setting */
273 byte mult_req
; /* requested multiple sector setting */
274 byte tune_req
; /* requested drive tuning setting */
275 byte io_32bit
; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
276 byte bad_wstat
; /* used for ignoring WRERR_STAT */
277 byte nowerr
; /* used for ignoring WRERR_STAT */
278 byte sect0
; /* offset of first sector for DM6:DDO */
279 byte usage
; /* current "open()" count for drive */
280 byte head
; /* "real" number of heads */
281 byte sect
; /* "real" sectors per track */
282 byte bios_head
; /* BIOS/fdisk/LILO number of heads */
283 byte bios_sect
; /* BIOS/fdisk/LILO sectors per track */
284 unsigned short bios_cyl
; /* BIOS/fdisk/LILO number of cyls */
285 unsigned short cyl
; /* "real" number of cyls */
286 unsigned int drive_data
; /* for use by tuneproc/selectproc as needed */
287 void *hwif
; /* actually (ide_hwif_t *) */
288 wait_queue_head_t wqueue
; /* used to wait for drive in open() */
289 struct hd_driveid
*id
; /* drive model identification info */
290 struct hd_struct
*part
; /* drive partition table */
291 char name
[4]; /* drive name, such as "hda" */
292 void *driver
; /* (ide_driver_t *) */
293 void *driver_data
; /* extra driver data */
294 struct proc_dir_entry
*proc
; /* /proc/ide/ directory entry */
295 void *settings
; /* /proc/ide/ drive settings */
296 char driver_req
[10]; /* requests specific driver */
298 struct thresholds_s
*smart_thresholds
;
299 struct values_s
*smart_values
;
301 thresholds_t smart_thresholds
;
302 values_t smart_values
;
307 * An ide_dmaproc_t() initiates/aborts DMA read/write operations on a drive.
309 * The caller is assumed to have selected the drive and programmed the drive's
310 * sector address using CHS or LBA. All that remains is to prepare for DMA
311 * and then issue the actual read/write DMA/PIO command to the drive.
313 * Returns 0 if all went well.
314 * Returns 1 if DMA read/write could not be started, in which case the caller
315 * should either try again later, or revert to PIO for the current request.
317 typedef enum { ide_dma_read
, ide_dma_write
, ide_dma_begin
,
318 ide_dma_end
, ide_dma_check
, ide_dma_on
,
319 ide_dma_off
, ide_dma_off_quietly
, ide_dma_test_irq
,
320 ide_dma_bad_drive
, ide_dma_good_drive
323 typedef int (ide_dmaproc_t
)(ide_dma_action_t
, ide_drive_t
*);
327 * An ide_tuneproc_t() is used to set the speed of an IDE interface
328 * to a particular PIO mode. The "byte" parameter is used
329 * to select the PIO mode by number (0,1,2,3,4,5), and a value of 255
330 * indicates that the interface driver should "auto-tune" the PIO mode
331 * according to the drive capabilities in drive->id;
333 * Not all interface types support tuning, and not all of those
334 * support all possible PIO settings. They may silently ignore
335 * or round values as they see fit.
337 typedef void (ide_tuneproc_t
)(ide_drive_t
*, byte
);
340 * This is used to provide support for strange interfaces
342 typedef void (ide_selectproc_t
) (ide_drive_t
*);
345 * hwif_chipset_t is used to keep track of the specific hardware
346 * chipset used by each IDE interface, if known.
348 typedef enum { ide_unknown
, ide_generic
, ide_pci
,
349 ide_cmd640
, ide_dtc2278
, ide_ali14xx
,
350 ide_qd6580
, ide_umc8672
, ide_ht6560b
,
351 ide_pdc4030
, ide_rz1000
, ide_trm290
,
352 ide_cmd646
, ide_cy82c693
, ide_4drives
355 typedef struct ide_pci_devid_s
{
360 #define IDE_PCI_DEVID_NULL ((ide_pci_devid_t){0,0})
361 #define IDE_PCI_DEVID_EQ(a,b) (a.vid == b.vid && a.did == b.did)
363 typedef struct hwif_s
{
364 struct hwif_s
*next
; /* for linked-list in ide_hwgroup_t */
365 void *hwgroup
; /* actually (ide_hwgroup_t *) */
366 ide_ioreg_t io_ports
[IDE_NR_PORTS
]; /* task file registers */
367 hw_regs_t hw
; /* Hardware info */
368 ide_drive_t drives
[MAX_DRIVES
]; /* drive info */
369 struct gendisk
*gd
; /* gendisk structure */
370 ide_tuneproc_t
*tuneproc
; /* routine to tune PIO mode for drives */
371 ide_selectproc_t
*selectproc
; /* tweaks hardware to select drive */
372 ide_dmaproc_t
*dmaproc
; /* dma read/write/abort routine */
373 unsigned long *dmatable
; /* dma physical region descriptor table */
374 struct hwif_s
*mate
; /* other hwif from same PCI chip */
375 unsigned long dma_base
; /* base addr for dma ports */
376 unsigned dma_extra
; /* extra addr for dma ports */
377 unsigned long config_data
; /* for use by chipset-specific code */
378 unsigned long select_data
; /* for use by chipset-specific code */
379 struct proc_dir_entry
*proc
; /* /proc/ide/ directory entry */
380 int irq
; /* our irq number */
381 byte major
; /* our major number */
382 char name
[6]; /* name of interface, eg. "ide0" */
383 byte index
; /* 0 for ide0; 1 for ide1; ... */
384 hwif_chipset_t chipset
; /* sub-module for tuning.. */
385 unsigned noprobe
: 1; /* don't probe for this interface */
386 unsigned present
: 1; /* this interface exists */
387 unsigned serialized
: 1; /* serialized operation with mate hwif */
388 unsigned sharing_irq
: 1; /* 1 = sharing irq with another hwif */
389 unsigned reset
: 1; /* reset after probe */
390 unsigned autodma
: 1; /* automatically try to enable DMA at boot */
391 byte channel
; /* for dual-port chips: 0=primary, 1=secondary */
392 struct pci_dev
*pci_dev
; /* for pci chipsets */
393 ide_pci_devid_t pci_devid
; /* for pci chipsets: {VID,DID} */
394 #if (DISK_RECOVERY_TIME > 0)
395 unsigned long last_time
; /* time when previous rq was done */
400 * internal ide interrupt handler type
402 typedef void (ide_handler_t
)(ide_drive_t
*);
404 typedef struct hwgroup_s
{
405 spinlock_t spinlock
; /* protects "busy" and "handler" */
406 ide_handler_t
*handler
;/* irq handler, if active */
407 int busy
; /* BOOL: protects all fields below */
408 ide_drive_t
*drive
; /* current drive */
409 ide_hwif_t
*hwif
; /* ptr to current hwif in linked-list */
410 struct request
*rq
; /* current request */
411 struct timer_list timer
; /* failsafe timer */
412 struct request wrq
; /* local copy of current write rq */
413 unsigned long poll_timeout
; /* timeout value during long polls */
417 * configurable drive settings
425 #define SETTING_READ (1 << 0)
426 #define SETTING_WRITE (1 << 1)
427 #define SETTING_RW (SETTING_READ | SETTING_WRITE)
429 typedef int (ide_procset_t
)(ide_drive_t
*, int);
430 typedef struct ide_settings_s
{
443 struct ide_settings_s
*next
;
446 void 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
);
447 void ide_remove_setting(ide_drive_t
*drive
, char *name
);
448 ide_settings_t
*ide_find_setting_by_name(ide_drive_t
*drive
, char *name
);
449 int ide_read_setting(ide_drive_t
*t
, ide_settings_t
*setting
);
450 int ide_write_setting(ide_drive_t
*drive
, ide_settings_t
*setting
, int val
);
451 void ide_add_generic_settings(ide_drive_t
*drive
);
454 * /proc/ide interface
459 read_proc_t
*read_proc
;
460 write_proc_t
*write_proc
;
463 #ifdef CONFIG_PROC_FS
464 void proc_ide_create(void);
465 void proc_ide_destroy(void);
466 void ide_add_proc_entries(struct proc_dir_entry
*dir
, ide_proc_entry_t
*p
, void *data
);
467 void ide_remove_proc_entries(struct proc_dir_entry
*dir
, ide_proc_entry_t
*p
);
468 read_proc_t proc_ide_read_capacity
;
469 read_proc_t proc_ide_read_geometry
;
472 * Standard exit stuff:
474 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
483 *start = page + off; \
487 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
491 * Subdrivers support.
493 #define IDE_SUBDRIVER_VERSION 1
495 typedef int (ide_cleanup_proc
)(ide_drive_t
*);
496 typedef void (ide_do_request_proc
)(ide_drive_t
*, struct request
*, unsigned long);
497 typedef void (ide_end_request_proc
)(byte
, ide_hwgroup_t
*);
498 typedef int (ide_ioctl_proc
)(ide_drive_t
*, struct inode
*, struct file
*, unsigned int, unsigned long);
499 typedef int (ide_open_proc
)(struct inode
*, struct file
*, ide_drive_t
*);
500 typedef void (ide_release_proc
)(struct inode
*, struct file
*, ide_drive_t
*);
501 typedef int (ide_check_media_change_proc
)(ide_drive_t
*);
502 typedef void (ide_pre_reset_proc
)(ide_drive_t
*);
503 typedef unsigned long (ide_capacity_proc
)(ide_drive_t
*);
504 typedef void (ide_special_proc
)(ide_drive_t
*);
505 typedef void (ide_setting_proc
)(ide_drive_t
*);
507 typedef struct ide_driver_s
{
512 unsigned supports_dma
: 1;
513 unsigned supports_dsc_overlap
: 1;
514 ide_cleanup_proc
*cleanup
;
515 ide_do_request_proc
*do_request
;
516 ide_end_request_proc
*end_request
;
517 ide_ioctl_proc
*ioctl
;
519 ide_release_proc
*release
;
520 ide_check_media_change_proc
*media_change
;
521 ide_pre_reset_proc
*pre_reset
;
522 ide_capacity_proc
*capacity
;
523 ide_special_proc
*special
;
524 ide_proc_entry_t
*proc
;
527 #define DRIVER(drive) ((ide_driver_t *)((drive)->driver))
532 #define IDE_CHIPSET_MODULE 0 /* not supported yet */
533 #define IDE_PROBE_MODULE 1
534 #define IDE_DRIVER_MODULE 2
536 typedef int (ide_module_init_proc
)(void);
538 typedef struct ide_module_s
{
540 ide_module_init_proc
*init
;
542 struct ide_module_s
*next
;
546 * ide_hwifs[] is the master data structure used to keep track
547 * of just about everything in ide.c. Whenever possible, routines
548 * should be using pointers to a drive (ide_drive_t *) or
549 * pointers to a hwif (ide_hwif_t *), rather than indexing this
550 * structure directly (the allocation/layout may change!).
554 extern ide_hwif_t ide_hwifs
[]; /* master data repository */
555 extern ide_module_t
*ide_modules
;
559 * We need blk.h, but we replace its end_request by our own version.
561 #define IDE_DRIVER /* Toggle some magic bits in blk.h */
562 #define LOCAL_END_REQUEST /* Don't generate end_request in blk.h */
563 #include <linux/blk.h>
565 void ide_end_request(byte uptodate
, ide_hwgroup_t
*hwgroup
);
568 * This is used for (nearly) all data transfers from/to the IDE interface
570 void ide_input_data (ide_drive_t
*drive
, void *buffer
, unsigned int wcount
);
571 void ide_output_data (ide_drive_t
*drive
, void *buffer
, unsigned int wcount
);
574 * This is used for (nearly) all ATAPI data transfers from/to the IDE interface
576 void atapi_input_bytes (ide_drive_t
*drive
, void *buffer
, unsigned int bytecount
);
577 void atapi_output_bytes (ide_drive_t
*drive
, void *buffer
, unsigned int bytecount
);
580 * This is used on exit from the driver, to designate the next irq handler
581 * and also to start the safety timer.
583 void ide_set_handler (ide_drive_t
*drive
, ide_handler_t
*handler
, unsigned int timeout
);
586 * Error reporting, in human readable form (luxurious, but a memory hog).
588 byte
ide_dump_status (ide_drive_t
*drive
, const char *msg
, byte stat
);
591 * ide_error() takes action based on the error returned by the controller.
592 * The calling function must return afterwards, to restart the request.
594 void ide_error (ide_drive_t
*drive
, const char *msg
, byte stat
);
597 * Issue a simple drive command
598 * The drive must be selected beforehand.
600 void ide_cmd(ide_drive_t
*drive
, byte cmd
, byte nsect
, ide_handler_t
*handler
);
603 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
604 * removing leading/trailing blanks and compressing internal blanks.
605 * It is primarily used to tidy up the model name/number fields as
606 * returned by the WIN_[P]IDENTIFY commands.
608 void ide_fixstring (byte
*s
, const int bytecount
, const int byteswap
);
611 * This routine busy-waits for the drive status to be not "busy".
612 * It then checks the status for all of the "good" bits and none
613 * of the "bad" bits, and if all is okay it returns 0. All other
614 * cases return 1 after invoking ide_error() -- caller should return.
617 int ide_wait_stat (ide_drive_t
*drive
, byte good
, byte bad
, unsigned long timeout
);
620 * This routine is called from the partition-table code in genhd.c
621 * to "convert" a drive to a logical geometry with fewer than 1024 cyls.
623 * The second parameter, "xparm", determines exactly how the translation
625 * 0 = convert to CHS with fewer than 1024 cyls
626 * using the same method as Ontrack DiskManager.
627 * 1 = same as "0", plus offset everything by 63 sectors.
628 * -1 = similar to "0", plus redirect sector 0 to sector 1.
629 * >1 = convert to a CHS geometry with "xparm" heads.
631 * Returns 0 if the translation was not possible, if the device was not
632 * an IDE disk drive, or if a geometry was "forced" on the commandline.
633 * Returns 1 if the geometry translation was successful.
635 int ide_xlate_1024 (kdev_t
, int, const char *);
638 * Start a reset operation for an IDE interface.
639 * The caller should return immediately after invoking this.
641 void ide_do_reset (ide_drive_t
*);
644 * This function is intended to be used prior to invoking ide_do_drive_cmd().
646 void ide_init_drive_cmd (struct request
*rq
);
649 * "action" parameter type for ide_do_drive_cmd() below.
652 {ide_wait
, /* insert rq at end of list, and wait for it */
653 ide_next
, /* insert rq immediately after current request */
654 ide_preempt
, /* insert rq in front of current request */
655 ide_end
} /* insert rq at end of list, but don't wait for it */
659 * This function issues a special IDE device request
660 * onto the request queue.
662 * If action is ide_wait, then the rq is queued at the end of the
663 * request queue, and the function sleeps until it has been processed.
664 * This is for use when invoked from an ioctl handler.
666 * If action is ide_preempt, then the rq is queued at the head of
667 * the request queue, displacing the currently-being-processed
668 * request and this function returns immediately without waiting
669 * for the new rq to be completed. This is VERY DANGEROUS, and is
670 * intended for careful use by the ATAPI tape/cdrom driver code.
672 * If action is ide_next, then the rq is queued immediately after
673 * the currently-being-processed-request (if any), and the function
674 * returns without waiting for the new rq to be completed. As above,
675 * This is VERY DANGEROUS, and is intended for careful use by the
676 * ATAPI tape/cdrom driver code.
678 * If action is ide_end, then the rq is queued at the end of the
679 * request queue, and the function returns immediately without waiting
680 * for the new rq to be completed. This is again intended for careful
681 * use by the ATAPI tape/cdrom driver code.
683 int ide_do_drive_cmd (ide_drive_t
*drive
, struct request
*rq
, ide_action_t action
);
686 * Clean up after success/failure of an explicit drive cmd.
687 * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_CMD).
689 void ide_end_drive_cmd (ide_drive_t
*drive
, byte stat
, byte err
);
692 * Issue ATA command and wait for completion.
694 int ide_wait_cmd (ide_drive_t
*drive
, int cmd
, int nsect
, int feature
, int sectors
, byte
*buf
);
696 void ide_delay_50ms (void);
699 * ide_system_bus_speed() returns what we think is the system VESA/PCI
700 * bus speed (in MHz). This is used for calculating interface PIO timings.
701 * The default is 40 for known PCI systems, 50 otherwise.
702 * The "idebus=xx" parameter can be used to override this value.
704 int ide_system_bus_speed (void);
707 * ide_multwrite() transfers a block of up to mcount sectors of data
708 * to a drive as part of a disk multwrite operation.
710 void ide_multwrite (ide_drive_t
*drive
, unsigned int mcount
);
713 * ide_stall_queue() can be used by a drive to give excess bandwidth back
714 * to the hwgroup by sleeping for timeout jiffies.
716 void ide_stall_queue (ide_drive_t
*drive
, unsigned long timeout
);
719 * ide_get_queue() returns the queue which corresponds to a given device.
721 struct request
**ide_get_queue (kdev_t dev
);
724 * CompactFlash cards and their brethern pretend to be removable hard disks,
725 * but they never have a slave unit, and they don't have doorlock mechanisms.
726 * This test catches them, and is invoked elsewhere when setting appropriate config bits.
728 int drive_is_flashcard (ide_drive_t
*drive
);
730 int ide_spin_wait_hwgroup(ide_drive_t
*drive
, unsigned long *flags
);
731 void ide_timer_expiry (unsigned long data
);
732 void ide_intr (int irq
, void *dev_id
, struct pt_regs
*regs
);
733 void ide_geninit (struct gendisk
*gd
);
734 void do_ide0_request (void);
736 void do_ide1_request (void);
739 void do_ide2_request (void);
742 void do_ide3_request (void);
745 void do_ide4_request (void);
748 void do_ide5_request (void);
751 void do_ide6_request (void);
754 void do_ide7_request (void);
756 void ide_init_subdrivers (void);
759 extern struct file_operations ide_fops
[];
763 #ifdef CONFIG_BLK_DEV_IDE
764 int ideprobe_init (void);
765 #endif /* CONFIG_BLK_DEV_IDE */
766 #ifdef CONFIG_BLK_DEV_IDEDISK
767 int idedisk_init (void);
768 #endif /* CONFIG_BLK_DEV_IDEDISK */
769 #ifdef CONFIG_BLK_DEV_IDECD
770 int ide_cdrom_init (void);
771 #endif /* CONFIG_BLK_DEV_IDECD */
772 #ifdef CONFIG_BLK_DEV_IDETAPE
773 int idetape_init (void);
774 #endif /* CONFIG_BLK_DEV_IDETAPE */
775 #ifdef CONFIG_BLK_DEV_IDEFLOPPY
776 int idefloppy_init (void);
777 #endif /* CONFIG_BLK_DEV_IDEFLOPPY */
778 #ifdef CONFIG_BLK_DEV_IDESCSI
779 int idescsi_init (void);
780 #endif /* CONFIG_BLK_DEV_IDESCSI */
783 int ide_register_module (ide_module_t
*module
);
784 void ide_unregister_module (ide_module_t
*module
);
785 ide_drive_t
*ide_scan_devices (byte media
, const char *name
, ide_driver_t
*driver
, int n
);
786 int ide_register_subdriver (ide_drive_t
*drive
, ide_driver_t
*driver
, int version
);
787 int ide_unregister_subdriver (ide_drive_t
*drive
);
788 int ide_replace_subdriver(ide_drive_t
*drive
, const char *driver
);
790 #ifdef CONFIG_BLK_DEV_IDEPCI
792 #define NEVER_BOARD 0
793 #ifdef CONFIG_BLK_DEV_OFFBOARD
794 # define OFF_BOARD ON_BOARD
795 #else /* CONFIG_BLK_DEV_OFFBOARD */
796 # define OFF_BOARD NEVER_BOARD
797 #endif /* CONFIG_BLK_DEV_OFFBOARD */
798 unsigned long ide_find_free_region (unsigned short size
) __init
;
799 void ide_scan_pcibus (void) __init
;
801 #ifdef CONFIG_BLK_DEV_IDEDMA
802 #define BAD_DMA_DRIVE 0
803 #define GOOD_DMA_DRIVE 1
804 int ide_build_dmatable (ide_drive_t
*drive
, ide_dma_action_t func
);
805 void ide_dma_intr (ide_drive_t
*drive
);
806 int check_drive_lists (ide_drive_t
*drive
, int good_bad
);
807 int ide_dmaproc (ide_dma_action_t func
, ide_drive_t
*drive
);
808 int ide_release_dma (ide_hwif_t
*hwif
);
809 void ide_setup_dma (ide_hwif_t
*hwif
, unsigned long dmabase
, unsigned int num_ports
) __init
;
810 unsigned long ide_get_or_set_dma_base (ide_hwif_t
*hwif
, int extra
, const char *name
) __init
;
813 /* This is too ugly to live! */
814 #ifdef CONFIG_BLK_DEV_PDC4030
816 #define IS_PDC4030_DRIVE (HWIF(drive)->chipset == ide_pdc4030)
818 #define IS_PDC4030_DRIVE (0) /* auto-NULLs out pdc4030 code */
819 #endif /* CONFIG_BLK_DEV_PDC4030 */