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[ARM] S3C: Fix scaler1 clock rate information
[linux-2.6/openmoko-kernel.git] / include / linux / ide.h
blob54525be4b5f87f8d0f43d21a40db8efee2ec10f5
1 #ifndef _IDE_H
2 #define _IDE_H
3 /*
4 * linux/include/linux/ide.h
5 *
6 * Copyright (C) 1994-2002 Linus Torvalds & authors
7 */
8
9 #include <linux/init.h>
10 #include <linux/ioport.h>
11 #include <linux/ata.h>
12 #include <linux/blkdev.h>
13 #include <linux/proc_fs.h>
14 #include <linux/interrupt.h>
15 #include <linux/bitops.h>
16 #include <linux/bio.h>
17 #include <linux/device.h>
18 #include <linux/pci.h>
19 #include <linux/completion.h>
20 #include <linux/pm.h>
21 #ifdef CONFIG_BLK_DEV_IDEACPI
22 #include <acpi/acpi.h>
23 #endif
24 #include <asm/byteorder.h>
25 #include <asm/system.h>
26 #include <asm/io.h>
27 #include <asm/mutex.h>
28
29 #if defined(CONFIG_CRIS) || defined(CONFIG_FRV)
30 # define SUPPORT_VLB_SYNC 0
31 #else
32 # define SUPPORT_VLB_SYNC 1
33 #endif
34
35 /*
36 * Used to indicate "no IRQ", should be a value that cannot be an IRQ
37 * number.
38 */
39
40 #define IDE_NO_IRQ (-1)
41
42 typedef unsigned char byte; /* used everywhere */
43
44 /*
45 * Probably not wise to fiddle with these
46 */
47 #define ERROR_MAX 8 /* Max read/write errors per sector */
48 #define ERROR_RESET 3 /* Reset controller every 4th retry */
49 #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
50
51 #define HWIF(drive) ((ide_hwif_t *)((drive)->hwif))
52 #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
53
54 /*
55 * Definitions for accessing IDE controller registers
56 */
57 #define IDE_NR_PORTS (10)
58
59 struct ide_io_ports {
60 unsigned long data_addr;
61
62 union {
63 unsigned long error_addr; /* read: error */
64 unsigned long feature_addr; /* write: feature */
65 };
66
67 unsigned long nsect_addr;
68 unsigned long lbal_addr;
69 unsigned long lbam_addr;
70 unsigned long lbah_addr;
71
72 unsigned long device_addr;
73
74 union {
75 unsigned long status_addr; /*  read: status  */
76 unsigned long command_addr; /* write: command */
77 };
78
79 unsigned long ctl_addr;
80
81 unsigned long irq_addr;
82 };
83
84 #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
85
86 #define BAD_R_STAT (ATA_BUSY | ATA_ERR)
87 #define BAD_W_STAT (BAD_R_STAT | ATA_DF)
88 #define BAD_STAT (BAD_R_STAT | ATA_DRQ)
89 #define DRIVE_READY (ATA_DRDY | ATA_DSC)
90
91 #define BAD_CRC (ATA_ABORTED | ATA_ICRC)
92
93 #define SATA_NR_PORTS (3) /* 16 possible ?? */
94
95 #define SATA_STATUS_OFFSET (0)
96 #define SATA_ERROR_OFFSET (1)
97 #define SATA_CONTROL_OFFSET (2)
98
99 /*
100 * Our Physical Region Descriptor (PRD) table should be large enough
101 * to handle the biggest I/O request we are likely to see. Since requests
102 * can have no more than 256 sectors, and since the typical blocksize is
103 * two or more sectors, we could get by with a limit of 128 entries here for
104 * the usual worst case. Most requests seem to include some contiguous blocks,
105 * further reducing the number of table entries required.
106 *
107 * The driver reverts to PIO mode for individual requests that exceed
108 * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
109 * 100% of all crazy scenarios here is not necessary.
110 *
111 * As it turns out though, we must allocate a full 4KB page for this,
112 * so the two PRD tables (ide0 & ide1) will each get half of that,
113 * allowing each to have about 256 entries (8 bytes each) from this.
114 */
115 #define PRD_BYTES 8
116 #define PRD_ENTRIES 256
117
118 /*
119 * Some more useful definitions
120 */
121 #define PARTN_BITS 6 /* number of minor dev bits for partitions */
122 #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
123 #define SECTOR_SIZE 512
124
125 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
126
127 /*
128 * Timeouts for various operations:
129 */
130 enum {
131 /* spec allows up to 20ms */
132 WAIT_DRQ = HZ / 10, /* 100ms */
133 /* some laptops are very slow */
134 WAIT_READY = 5 * HZ, /* 5s */
135 /* should be less than 3ms (?), if all ATAPI CD is closed at boot */
136 WAIT_PIDENTIFY = 10 * HZ, /* 10s */
137 /* worst case when spinning up */
138 WAIT_WORSTCASE = 30 * HZ, /* 30s */
139 /* maximum wait for an IRQ to happen */
140 WAIT_CMD = 10 * HZ, /* 10s */
141 /* Some drives require a longer IRQ timeout. */
142 WAIT_FLOPPY_CMD = 50 * HZ, /* 50s */
143 /*
144 * Some drives (for example, Seagate STT3401A Travan) require a very
145 * long timeout, because they don't return an interrupt or clear their
146 * BSY bit until after the command completes (even retension commands).
147 */
148 WAIT_TAPE_CMD = 900 * HZ, /* 900s */
149 /* minimum sleep time */
150 WAIT_MIN_SLEEP = HZ / 50, /* 20ms */
151 };
152
153 /*
154 * Op codes for special requests to be handled by ide_special_rq().
155 * Values should be in the range of 0x20 to 0x3f.
156 */
157 #define REQ_DRIVE_RESET 0x20
158 #define REQ_DEVSET_EXEC 0x21
159 #define REQ_PARK_HEADS 0x22
160 #define REQ_UNPARK_HEADS 0x23
161
162 /*
163 * Check for an interrupt and acknowledge the interrupt status
164 */
165 struct hwif_s;
166 typedef int (ide_ack_intr_t)(struct hwif_s *);
167
168 /*
169 * hwif_chipset_t is used to keep track of the specific hardware
170 * chipset used by each IDE interface, if known.
171 */
172 enum { ide_unknown, ide_generic, ide_pci,
173 ide_cmd640, ide_dtc2278, ide_ali14xx,
174 ide_qd65xx, ide_umc8672, ide_ht6560b,
175 ide_rz1000, ide_trm290,
176 ide_cmd646, ide_cy82c693, ide_4drives,
177 ide_pmac, ide_acorn,
178 ide_au1xxx, ide_palm3710
179 };
180
181 typedef u8 hwif_chipset_t;
182
183 /*
184 * Structure to hold all information about the location of this port
185 */
186 typedef struct hw_regs_s {
187 union {
188 struct ide_io_ports io_ports;
189 unsigned long io_ports_array[IDE_NR_PORTS];
190 };
191
192 int irq; /* our irq number */
193 ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
194 hwif_chipset_t chipset;
195 struct device *dev, *parent;
196 unsigned long config;
197 } hw_regs_t;
198
199 void ide_init_port_data(struct hwif_s *, unsigned int);
200 void ide_init_port_hw(struct hwif_s *, hw_regs_t *);
201
202 static inline void ide_std_init_ports(hw_regs_t *hw,
203 unsigned long io_addr,
204 unsigned long ctl_addr)
205 {
206 unsigned int i;
207
208 for (i = 0; i <= 7; i++)
209 hw->io_ports_array[i] = io_addr++;
210
211 hw->io_ports.ctl_addr = ctl_addr;
212 }
213
214 /* for IDE PCI controllers in legacy mode, temporary */
215 static inline int __ide_default_irq(unsigned long base)
216 {
217 switch (base) {
218 #ifdef CONFIG_IA64
219 case 0x1f0: return isa_irq_to_vector(14);
220 case 0x170: return isa_irq_to_vector(15);
221 #else
222 case 0x1f0: return 14;
223 case 0x170: return 15;
224 #endif
225 }
226 return 0;
227 }
228
229 #if defined(CONFIG_ARM) || defined(CONFIG_FRV) || defined(CONFIG_M68K) || \
230 defined(CONFIG_MIPS) || defined(CONFIG_MN10300) || defined(CONFIG_PARISC) \
231 || defined(CONFIG_PPC) || defined(CONFIG_SPARC) || defined(CONFIG_SPARC64)
232 #include <asm/ide.h>
233 #else
234 #include <asm-generic/ide_iops.h>
235 #endif
236
237 #define MAX_HWIFS 10
238
239 /* Currently only m68k, apus and m8xx need it */
240 #ifndef IDE_ARCH_ACK_INTR
241 # define ide_ack_intr(hwif) (1)
242 #endif
243
244 /* Currently only Atari needs it */
245 #ifndef IDE_ARCH_LOCK
246 # define ide_release_lock() do {} while (0)
247 # define ide_get_lock(hdlr, data) do {} while (0)
248 #endif /* IDE_ARCH_LOCK */
249
250 /*
251 * Now for the data we need to maintain per-drive: ide_drive_t
252 */
253
254 #define ide_scsi 0x21
255 #define ide_disk 0x20
256 #define ide_optical 0x7
257 #define ide_cdrom 0x5
258 #define ide_tape 0x1
259 #define ide_floppy 0x0
260
261 /*
262 * Special Driver Flags
263 *
264 * set_geometry : respecify drive geometry
265 * recalibrate : seek to cyl 0
266 * set_multmode : set multmode count
267 * reserved : unused
268 */
269 typedef union {
270 unsigned all : 8;
271 struct {
272 unsigned set_geometry : 1;
273 unsigned recalibrate : 1;
274 unsigned set_multmode : 1;
275 unsigned reserved : 5;
276 } b;
277 } special_t;
278
279 /*
280 * Status returned from various ide_ functions
281 */
282 typedef enum {
283 ide_stopped, /* no drive operation was started */
284 ide_started, /* a drive operation was started, handler was set */
285 } ide_startstop_t;
286
287 enum {
288 IDE_TFLAG_LBA48 = (1 << 0),
289 IDE_TFLAG_FLAGGED = (1 << 2),
290 IDE_TFLAG_OUT_DATA = (1 << 3),
291 IDE_TFLAG_OUT_HOB_FEATURE = (1 << 4),
292 IDE_TFLAG_OUT_HOB_NSECT = (1 << 5),
293 IDE_TFLAG_OUT_HOB_LBAL = (1 << 6),
294 IDE_TFLAG_OUT_HOB_LBAM = (1 << 7),
295 IDE_TFLAG_OUT_HOB_LBAH = (1 << 8),
296 IDE_TFLAG_OUT_HOB = IDE_TFLAG_OUT_HOB_FEATURE |
297 IDE_TFLAG_OUT_HOB_NSECT |
298 IDE_TFLAG_OUT_HOB_LBAL |
299 IDE_TFLAG_OUT_HOB_LBAM |
300 IDE_TFLAG_OUT_HOB_LBAH,
301 IDE_TFLAG_OUT_FEATURE = (1 << 9),
302 IDE_TFLAG_OUT_NSECT = (1 << 10),
303 IDE_TFLAG_OUT_LBAL = (1 << 11),
304 IDE_TFLAG_OUT_LBAM = (1 << 12),
305 IDE_TFLAG_OUT_LBAH = (1 << 13),
306 IDE_TFLAG_OUT_TF = IDE_TFLAG_OUT_FEATURE |
307 IDE_TFLAG_OUT_NSECT |
308 IDE_TFLAG_OUT_LBAL |
309 IDE_TFLAG_OUT_LBAM |
310 IDE_TFLAG_OUT_LBAH,
311 IDE_TFLAG_OUT_DEVICE = (1 << 14),
312 IDE_TFLAG_WRITE = (1 << 15),
313 IDE_TFLAG_FLAGGED_SET_IN_FLAGS = (1 << 16),
314 IDE_TFLAG_IN_DATA = (1 << 17),
315 IDE_TFLAG_CUSTOM_HANDLER = (1 << 18),
316 IDE_TFLAG_DMA_PIO_FALLBACK = (1 << 19),
317 IDE_TFLAG_IN_HOB_FEATURE = (1 << 20),
318 IDE_TFLAG_IN_HOB_NSECT = (1 << 21),
319 IDE_TFLAG_IN_HOB_LBAL = (1 << 22),
320 IDE_TFLAG_IN_HOB_LBAM = (1 << 23),
321 IDE_TFLAG_IN_HOB_LBAH = (1 << 24),
322 IDE_TFLAG_IN_HOB_LBA = IDE_TFLAG_IN_HOB_LBAL |
323 IDE_TFLAG_IN_HOB_LBAM |
324 IDE_TFLAG_IN_HOB_LBAH,
325 IDE_TFLAG_IN_HOB = IDE_TFLAG_IN_HOB_FEATURE |
326 IDE_TFLAG_IN_HOB_NSECT |
327 IDE_TFLAG_IN_HOB_LBA,
328 IDE_TFLAG_IN_FEATURE = (1 << 1),
329 IDE_TFLAG_IN_NSECT = (1 << 25),
330 IDE_TFLAG_IN_LBAL = (1 << 26),
331 IDE_TFLAG_IN_LBAM = (1 << 27),
332 IDE_TFLAG_IN_LBAH = (1 << 28),
333 IDE_TFLAG_IN_LBA = IDE_TFLAG_IN_LBAL |
334 IDE_TFLAG_IN_LBAM |
335 IDE_TFLAG_IN_LBAH,
336 IDE_TFLAG_IN_TF = IDE_TFLAG_IN_NSECT |
337 IDE_TFLAG_IN_LBA,
338 IDE_TFLAG_IN_DEVICE = (1 << 29),
339 IDE_TFLAG_HOB = IDE_TFLAG_OUT_HOB |
340 IDE_TFLAG_IN_HOB,
341 IDE_TFLAG_TF = IDE_TFLAG_OUT_TF |
342 IDE_TFLAG_IN_TF,
343 IDE_TFLAG_DEVICE = IDE_TFLAG_OUT_DEVICE |
344 IDE_TFLAG_IN_DEVICE,
345 /* force 16-bit I/O operations */
346 IDE_TFLAG_IO_16BIT = (1 << 30),
347 /* ide_task_t was allocated using kmalloc() */
348 IDE_TFLAG_DYN = (1 << 31),
349 };
350
351 struct ide_taskfile {
352 u8 hob_data; /* 0: high data byte (for TASKFILE IOCTL) */
353
354 u8 hob_feature; /* 1-5: additional data to support LBA48 */
355 u8 hob_nsect;
356 u8 hob_lbal;
357 u8 hob_lbam;
358 u8 hob_lbah;
359
360 u8 data; /* 6: low data byte (for TASKFILE IOCTL) */
361
362 union { /*  7: */
363 u8 error; /* read: error */
364 u8 feature; /* write: feature */
365 };
366
367 u8 nsect; /* 8: number of sectors */
368 u8 lbal; /* 9: LBA low */
369 u8 lbam; /* 10: LBA mid */
370 u8 lbah; /* 11: LBA high */
371
372 u8 device; /* 12: device select */
373
374 union { /* 13: */
375 u8 status; /*  read: status  */
376 u8 command; /* write: command */
377 };
378 };
379
380 typedef struct ide_task_s {
381 union {
382 struct ide_taskfile tf;
383 u8 tf_array[14];
384 };
385 u32 tf_flags;
386 int data_phase;
387 struct request *rq; /* copy of request */
388 void *special; /* valid_t generally */
389 } ide_task_t;
390
391 /* ATAPI packet command flags */
392 enum {
393 /* set when an error is considered normal - no retry (ide-tape) */
394 PC_FLAG_ABORT = (1 << 0),
395 PC_FLAG_SUPPRESS_ERROR = (1 << 1),
396 PC_FLAG_WAIT_FOR_DSC = (1 << 2),
397 PC_FLAG_DMA_OK = (1 << 3),
398 PC_FLAG_DMA_IN_PROGRESS = (1 << 4),
399 PC_FLAG_DMA_ERROR = (1 << 5),
400 PC_FLAG_WRITING = (1 << 6),
401 /* command timed out */
402 PC_FLAG_TIMEDOUT = (1 << 7),
403 };
404
405 /*
406 * With each packet command, we allocate a buffer of IDE_PC_BUFFER_SIZE bytes.
407 * This is used for several packet commands (not for READ/WRITE commands).
408 */
409 #define IDE_PC_BUFFER_SIZE 256
410
411 struct ide_atapi_pc {
412 /* actual packet bytes */
413 u8 c[12];
414 /* incremented on each retry */
415 int retries;
416 int error;
417
418 /* bytes to transfer */
419 int req_xfer;
420 /* bytes actually transferred */
421 int xferred;
422
423 /* data buffer */
424 u8 *buf;
425 /* current buffer position */
426 u8 *cur_pos;
427 int buf_size;
428 /* missing/available data on the current buffer */
429 int b_count;
430
431 /* the corresponding request */
432 struct request *rq;
433
434 unsigned long flags;
435
436 /*
437 * those are more or less driver-specific and some of them are subject
438 * to change/removal later.
439 */
440 u8 pc_buf[IDE_PC_BUFFER_SIZE];
441
442 /* idetape only */
443 struct idetape_bh *bh;
444 char *b_data;
445
446 /* idescsi only for now */
447 struct scatterlist *sg;
448 unsigned int sg_cnt;
449
450 struct scsi_cmnd *scsi_cmd;
451 void (*done) (struct scsi_cmnd *);
452
453 unsigned long timeout;
454 };
455
456 struct ide_devset;
457 struct ide_driver_s;
458
459 #ifdef CONFIG_BLK_DEV_IDEACPI
460 struct ide_acpi_drive_link;
461 struct ide_acpi_hwif_link;
462 #endif
463
464 struct ide_drive_s;
465
466 struct ide_disk_ops {
467 int (*check)(struct ide_drive_s *, const char *);
468 int (*get_capacity)(struct ide_drive_s *);
469 void (*setup)(struct ide_drive_s *);
470 void (*flush)(struct ide_drive_s *);
471 int (*init_media)(struct ide_drive_s *, struct gendisk *);
472 int (*set_doorlock)(struct ide_drive_s *, struct gendisk *,
473 int);
474 ide_startstop_t (*do_request)(struct ide_drive_s *, struct request *,
475 sector_t);
476 int (*end_request)(struct ide_drive_s *, int, int);
477 int (*ioctl)(struct ide_drive_s *, struct block_device *,
478 fmode_t, unsigned int, unsigned long);
479 };
480
481 /* ATAPI device flags */
482 enum {
483 IDE_AFLAG_DRQ_INTERRUPT = (1 << 0),
484
485 /* ide-cd */
486 /* Drive cannot eject the disc. */
487 IDE_AFLAG_NO_EJECT = (1 << 3),
488 /* Drive is a pre ATAPI 1.2 drive. */
489 IDE_AFLAG_PRE_ATAPI12 = (1 << 4),
490 /* TOC addresses are in BCD. */
491 IDE_AFLAG_TOCADDR_AS_BCD = (1 << 5),
492 /* TOC track numbers are in BCD. */
493 IDE_AFLAG_TOCTRACKS_AS_BCD = (1 << 6),
494 /*
495 * Drive does not provide data in multiples of SECTOR_SIZE
496 * when more than one interrupt is needed.
497 */
498 IDE_AFLAG_LIMIT_NFRAMES = (1 << 7),
499 /* Seeking in progress. */
500 IDE_AFLAG_SEEKING = (1 << 8),
501 /* Saved TOC information is current. */
502 IDE_AFLAG_TOC_VALID = (1 << 9),
503 /* We think that the drive door is locked. */
504 IDE_AFLAG_DOOR_LOCKED = (1 << 10),
505 /* SET_CD_SPEED command is unsupported. */
506 IDE_AFLAG_NO_SPEED_SELECT = (1 << 11),
507 IDE_AFLAG_VERTOS_300_SSD = (1 << 12),
508 IDE_AFLAG_VERTOS_600_ESD = (1 << 13),
509 IDE_AFLAG_SANYO_3CD = (1 << 14),
510 IDE_AFLAG_FULL_CAPS_PAGE = (1 << 15),
511 IDE_AFLAG_PLAY_AUDIO_OK = (1 << 16),
512 IDE_AFLAG_LE_SPEED_FIELDS = (1 << 17),
513
514 /* ide-floppy */
515 /* Avoid commands not supported in Clik drive */
516 IDE_AFLAG_CLIK_DRIVE = (1 << 19),
517 /* Requires BH algorithm for packets */
518 IDE_AFLAG_ZIP_DRIVE = (1 << 20),
519 /* Supports format progress report */
520 IDE_AFLAG_SRFP = (1 << 22),
521
522 /* ide-tape */
523 IDE_AFLAG_IGNORE_DSC = (1 << 23),
524 /* 0 When the tape position is unknown */
525 IDE_AFLAG_ADDRESS_VALID = (1 << 24),
526 /* Device already opened */
527 IDE_AFLAG_BUSY = (1 << 25),
528 /* Attempt to auto-detect the current user block size */
529 IDE_AFLAG_DETECT_BS = (1 << 26),
530 /* Currently on a filemark */
531 IDE_AFLAG_FILEMARK = (1 << 27),
532 /* 0 = no tape is loaded, so we don't rewind after ejecting */
533 IDE_AFLAG_MEDIUM_PRESENT = (1 << 28),
534
535 IDE_AFLAG_NO_AUTOCLOSE = (1 << 29),
536 };
537
538 /* device flags */
539 enum {
540 /* restore settings after device reset */
541 IDE_DFLAG_KEEP_SETTINGS = (1 << 0),
542 /* device is using DMA for read/write */
543 IDE_DFLAG_USING_DMA = (1 << 1),
544 /* okay to unmask other IRQs */
545 IDE_DFLAG_UNMASK = (1 << 2),
546 /* don't attempt flushes */
547 IDE_DFLAG_NOFLUSH = (1 << 3),
548 /* DSC overlap */
549 IDE_DFLAG_DSC_OVERLAP = (1 << 4),
550 /* give potential excess bandwidth */
551 IDE_DFLAG_NICE1 = (1 << 5),
552 /* device is physically present */
553 IDE_DFLAG_PRESENT = (1 << 6),
554 /* device ejected hint */
555 IDE_DFLAG_DEAD = (1 << 7),
556 /* id read from device (synthetic if not set) */
557 IDE_DFLAG_ID_READ = (1 << 8),
558 IDE_DFLAG_NOPROBE = (1 << 9),
559 /* need to do check_media_change() */
560 IDE_DFLAG_REMOVABLE = (1 << 10),
561 /* needed for removable devices */
562 IDE_DFLAG_ATTACH = (1 << 11),
563 IDE_DFLAG_FORCED_GEOM = (1 << 12),
564 /* disallow setting unmask bit */
565 IDE_DFLAG_NO_UNMASK = (1 << 13),
566 /* disallow enabling 32-bit I/O */
567 IDE_DFLAG_NO_IO_32BIT = (1 << 14),
568 /* for removable only: door lock/unlock works */
569 IDE_DFLAG_DOORLOCKING = (1 << 15),
570 /* disallow DMA */
571 IDE_DFLAG_NODMA = (1 << 16),
572 /* powermanagment told us not to do anything, so sleep nicely */
573 IDE_DFLAG_BLOCKED = (1 << 17),
574 /* ide-scsi emulation */
575 IDE_DFLAG_SCSI = (1 << 18),
576 /* sleeping & sleep field valid */
577 IDE_DFLAG_SLEEPING = (1 << 19),
578 IDE_DFLAG_POST_RESET = (1 << 20),
579 IDE_DFLAG_UDMA33_WARNED = (1 << 21),
580 IDE_DFLAG_LBA48 = (1 << 22),
581 /* status of write cache */
582 IDE_DFLAG_WCACHE = (1 << 23),
583 /* used for ignoring ATA_DF */
584 IDE_DFLAG_NOWERR = (1 << 24),
585 /* retrying in PIO */
586 IDE_DFLAG_DMA_PIO_RETRY = (1 << 25),
587 IDE_DFLAG_LBA = (1 << 26),
588 /* don't unload heads */
589 IDE_DFLAG_NO_UNLOAD = (1 << 27),
590 /* heads unloaded, please don't reset port */
591 IDE_DFLAG_PARKED = (1 << 28),
592 IDE_DFLAG_MEDIA_CHANGED = (1 << 29),
593 /* write protect */
594 IDE_DFLAG_WP = (1 << 30),
595 IDE_DFLAG_FORMAT_IN_PROGRESS = (1 << 31),
596 };
597
598 struct ide_drive_s {
599 char name[4]; /* drive name, such as "hda" */
600 char driver_req[10]; /* requests specific driver */
601
602 struct request_queue *queue; /* request queue */
603
604 struct request *rq; /* current request */
605 struct ide_drive_s *next; /* circular list of hwgroup drives */
606 void *driver_data; /* extra driver data */
607 u16 *id; /* identification info */
608 #ifdef CONFIG_IDE_PROC_FS
609 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
610 const struct ide_proc_devset *settings; /* /proc/ide/ drive settings */
611 #endif
612 struct hwif_s *hwif; /* actually (ide_hwif_t *) */
613
614 const struct ide_disk_ops *disk_ops;
615
616 unsigned long dev_flags;
617
618 unsigned long sleep; /* sleep until this time */
619 unsigned long service_start; /* time we started last request */
620 unsigned long service_time; /* service time of last request */
621 unsigned long timeout; /* max time to wait for irq */
622
623 special_t special; /* special action flags */
624
625 u8 select; /* basic drive/head select reg value */
626 u8 retry_pio; /* retrying dma capable host in pio */
627 u8 waiting_for_dma; /* dma currently in progress */
628 u8 dma; /* atapi dma flag */
629
630 u8 quirk_list; /* considered quirky, set for a specific host */
631 u8 init_speed; /* transfer rate set at boot */
632 u8 current_speed; /* current transfer rate set */
633 u8 desired_speed; /* desired transfer rate set */
634 u8 dn; /* now wide spread use */
635 u8 acoustic; /* acoustic management */
636 u8 media; /* disk, cdrom, tape, floppy, ... */
637 u8 ready_stat; /* min status value for drive ready */
638 u8 mult_count; /* current multiple sector setting */
639 u8 mult_req; /* requested multiple sector setting */
640 u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
641 u8 bad_wstat; /* used for ignoring ATA_DF */
642 u8 head; /* "real" number of heads */
643 u8 sect; /* "real" sectors per track */
644 u8 bios_head; /* BIOS/fdisk/LILO number of heads */
645 u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
646
647 /* delay this long before sending packet command */
648 u8 pc_delay;
649
650 unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
651 unsigned int cyl; /* "real" number of cyls */
652 unsigned int drive_data; /* used by set_pio_mode/selectproc */
653 unsigned int failures; /* current failure count */
654 unsigned int max_failures; /* maximum allowed failure count */
655 u64 probed_capacity;/* initial reported media capacity (ide-cd only currently) */
656
657 u64 capacity64; /* total number of sectors */
658
659 int lun; /* logical unit */
660 int crc_count; /* crc counter to reduce drive speed */
661
662 unsigned long debug_mask; /* debugging levels switch */
663
664 #ifdef CONFIG_BLK_DEV_IDEACPI
665 struct ide_acpi_drive_link *acpidata;
666 #endif
667 struct list_head list;
668 struct device gendev;
669 struct completion gendev_rel_comp; /* to deal with device release() */
670
671 /* current packet command */
672 struct ide_atapi_pc *pc;
673
674 /* callback for packet commands */
675 void (*pc_callback)(struct ide_drive_s *, int);
676
677 void (*pc_update_buffers)(struct ide_drive_s *, struct ide_atapi_pc *);
678 int (*pc_io_buffers)(struct ide_drive_s *, struct ide_atapi_pc *,
679 unsigned int, int);
680
681 unsigned long atapi_flags;
682
683 struct ide_atapi_pc request_sense_pc;
684 struct request request_sense_rq;
685 };
686
687 typedef struct ide_drive_s ide_drive_t;
688
689 #define to_ide_device(dev) container_of(dev, ide_drive_t, gendev)
690
691 #define to_ide_drv(obj, cont_type) \
692 container_of(obj, struct cont_type, kref)
693
694 #define ide_drv_g(disk, cont_type) \
695 container_of((disk)->private_data, struct cont_type, driver)
696
697 struct ide_port_info;
698
699 struct ide_tp_ops {
700 void (*exec_command)(struct hwif_s *, u8);
701 u8 (*read_status)(struct hwif_s *);
702 u8 (*read_altstatus)(struct hwif_s *);
703 u8 (*read_sff_dma_status)(struct hwif_s *);
704
705 void (*set_irq)(struct hwif_s *, int);
706
707 void (*tf_load)(ide_drive_t *, struct ide_task_s *);
708 void (*tf_read)(ide_drive_t *, struct ide_task_s *);
709
710 void (*input_data)(ide_drive_t *, struct request *, void *,
711 unsigned int);
712 void (*output_data)(ide_drive_t *, struct request *, void *,
713 unsigned int);
714 };
715
716 extern const struct ide_tp_ops default_tp_ops;
717
718 /**
719 * struct ide_port_ops - IDE port operations
720 *
721 * @init_dev: host specific initialization of a device
722 * @set_pio_mode: routine to program host for PIO mode
723 * @set_dma_mode: routine to program host for DMA mode
724 * @selectproc: tweaks hardware to select drive
725 * @reset_poll: chipset polling based on hba specifics
726 * @pre_reset: chipset specific changes to default for device-hba resets
727 * @resetproc: routine to reset controller after a disk reset
728 * @maskproc: special host masking for drive selection
729 * @quirkproc: check host's drive quirk list
730 * @clear_irq: clear IRQ
731 *
732 * @mdma_filter: filter MDMA modes
733 * @udma_filter: filter UDMA modes
734 *
735 * @cable_detect: detect cable type
736 */
737 struct ide_port_ops {
738 void (*init_dev)(ide_drive_t *);
739 void (*set_pio_mode)(ide_drive_t *, const u8);
740 void (*set_dma_mode)(ide_drive_t *, const u8);
741 void (*selectproc)(ide_drive_t *);
742 int (*reset_poll)(ide_drive_t *);
743 void (*pre_reset)(ide_drive_t *);
744 void (*resetproc)(ide_drive_t *);
745 void (*maskproc)(ide_drive_t *, int);
746 void (*quirkproc)(ide_drive_t *);
747 void (*clear_irq)(ide_drive_t *);
748
749 u8 (*mdma_filter)(ide_drive_t *);
750 u8 (*udma_filter)(ide_drive_t *);
751
752 u8 (*cable_detect)(struct hwif_s *);
753 };
754
755 struct ide_dma_ops {
756 void (*dma_host_set)(struct ide_drive_s *, int);
757 int (*dma_setup)(struct ide_drive_s *);
758 void (*dma_exec_cmd)(struct ide_drive_s *, u8);
759 void (*dma_start)(struct ide_drive_s *);
760 int (*dma_end)(struct ide_drive_s *);
761 int (*dma_test_irq)(struct ide_drive_s *);
762 void (*dma_lost_irq)(struct ide_drive_s *);
763 void (*dma_timeout)(struct ide_drive_s *);
764 };
765
766 struct ide_host;
767
768 typedef struct hwif_s {
769 struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
770 struct hwif_s *mate; /* other hwif from same PCI chip */
771 struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */
772 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
773
774 struct ide_host *host;
775
776 char name[6]; /* name of interface, eg. "ide0" */
777
778 struct ide_io_ports io_ports;
779
780 unsigned long sata_scr[SATA_NR_PORTS];
781
782 ide_drive_t drives[MAX_DRIVES]; /* drive info */
783
784 u8 major; /* our major number */
785 u8 index; /* 0 for ide0; 1 for ide1; ... */
786 u8 channel; /* for dual-port chips: 0=primary, 1=secondary */
787
788 u32 host_flags;
789
790 u8 pio_mask;
791
792 u8 ultra_mask;
793 u8 mwdma_mask;
794 u8 swdma_mask;
795
796 u8 cbl; /* cable type */
797
798 hwif_chipset_t chipset; /* sub-module for tuning.. */
799
800 struct device *dev;
801
802 ide_ack_intr_t *ack_intr;
803
804 void (*rw_disk)(ide_drive_t *, struct request *);
805
806 const struct ide_tp_ops *tp_ops;
807 const struct ide_port_ops *port_ops;
808 const struct ide_dma_ops *dma_ops;
809
810 /* dma physical region descriptor table (cpu view) */
811 unsigned int *dmatable_cpu;
812 /* dma physical region descriptor table (dma view) */
813 dma_addr_t dmatable_dma;
814
815 /* maximum number of PRD table entries */
816 int prd_max_nents;
817 /* PRD entry size in bytes */
818 int prd_ent_size;
819
820 /* Scatter-gather list used to build the above */
821 struct scatterlist *sg_table;
822 int sg_max_nents; /* Maximum number of entries in it */
823 int sg_nents; /* Current number of entries in it */
824 int sg_dma_direction; /* dma transfer direction */
825
826 /* data phase of the active command (currently only valid for PIO/DMA) */
827 int data_phase;
828
829 struct ide_task_s task; /* current command */
830
831 unsigned int nsect;
832 unsigned int nleft;
833 struct scatterlist *cursg;
834 unsigned int cursg_ofs;
835
836 int rqsize; /* max sectors per request */
837 int irq; /* our irq number */
838
839 unsigned long dma_base; /* base addr for dma ports */
840
841 unsigned long config_data; /* for use by chipset-specific code */
842 unsigned long select_data; /* for use by chipset-specific code */
843
844 unsigned long extra_base; /* extra addr for dma ports */
845 unsigned extra_ports; /* number of extra dma ports */
846
847 unsigned present : 1; /* this interface exists */
848 unsigned serialized : 1; /* serialized all channel operation */
849 unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
850 unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */
851
852 struct device gendev;
853 struct device *portdev;
854
855 struct completion gendev_rel_comp; /* To deal with device release() */
856
857 void *hwif_data; /* extra hwif data */
858
859 #ifdef CONFIG_BLK_DEV_IDEACPI
860 struct ide_acpi_hwif_link *acpidata;
861 #endif
862 } ____cacheline_internodealigned_in_smp ide_hwif_t;
863
864 #define MAX_HOST_PORTS 4
865
866 struct ide_host {
867 ide_hwif_t *ports[MAX_HOST_PORTS];
868 unsigned int n_ports;
869 struct device *dev[2];
870 unsigned int (*init_chipset)(struct pci_dev *);
871 unsigned long host_flags;
872 void *host_priv;
873 };
874
875 /*
876 * internal ide interrupt handler type
877 */
878 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
879 typedef int (ide_expiry_t)(ide_drive_t *);
880
881 /* used by ide-cd, ide-floppy, etc. */
882 typedef void (xfer_func_t)(ide_drive_t *, struct request *rq, void *, unsigned);
883
884 typedef struct hwgroup_s {
885 /* irq handler, if active */
886 ide_startstop_t (*handler)(ide_drive_t *);
887
888 /* BOOL: protects all fields below */
889 volatile int busy;
890 /* BOOL: wake us up on timer expiry */
891 unsigned int sleeping : 1;
892 /* BOOL: polling active & poll_timeout field valid */
893 unsigned int polling : 1;
894
895 /* current drive */
896 ide_drive_t *drive;
897 /* ptr to current hwif in linked-list */
898 ide_hwif_t *hwif;
899
900 /* current request */
901 struct request *rq;
902
903 /* failsafe timer */
904 struct timer_list timer;
905 /* timeout value during long polls */
906 unsigned long poll_timeout;
907 /* queried upon timeouts */
908 int (*expiry)(ide_drive_t *);
909
910 int req_gen;
911 int req_gen_timer;
912 } ide_hwgroup_t;
913
914 typedef struct ide_driver_s ide_driver_t;
915
916 extern struct mutex ide_setting_mtx;
917
918 /*
919 * configurable drive settings
920 */
921
922 #define DS_SYNC (1 << 0)
923
924 struct ide_devset {
925 int (*get)(ide_drive_t *);
926 int (*set)(ide_drive_t *, int);
927 unsigned int flags;
928 };
929
930 #define __DEVSET(_flags, _get, _set) { \
931 .flags = _flags, \
932 .get = _get, \
933 .set = _set, \
934 }
935
936 #define ide_devset_get(name, field) \
937 static int get_##name(ide_drive_t *drive) \
938 { \
939 return drive->field; \
940 }
941
942 #define ide_devset_set(name, field) \
943 static int set_##name(ide_drive_t *drive, int arg) \
944 { \
945 drive->field = arg; \
946 return 0; \
947 }
948
949 #define ide_devset_get_flag(name, flag) \
950 static int get_##name(ide_drive_t *drive) \
951 { \
952 return !!(drive->dev_flags & flag); \
953 }
954
955 #define ide_devset_set_flag(name, flag) \
956 static int set_##name(ide_drive_t *drive, int arg) \
957 { \
958 if (arg) \
959 drive->dev_flags |= flag; \
960 else \
961 drive->dev_flags &= ~flag; \
962 return 0; \
963 }
964
965 #define __IDE_DEVSET(_name, _flags, _get, _set) \
966 const struct ide_devset ide_devset_##_name = \
967 __DEVSET(_flags, _get, _set)
968
969 #define IDE_DEVSET(_name, _flags, _get, _set) \
970 static __IDE_DEVSET(_name, _flags, _get, _set)
971
972 #define ide_devset_rw(_name, _func) \
973 IDE_DEVSET(_name, 0, get_##_func, set_##_func)
974
975 #define ide_devset_w(_name, _func) \
976 IDE_DEVSET(_name, 0, NULL, set_##_func)
977
978 #define ide_ext_devset_rw(_name, _func) \
979 __IDE_DEVSET(_name, 0, get_##_func, set_##_func)
980
981 #define ide_ext_devset_rw_sync(_name, _func) \
982 __IDE_DEVSET(_name, DS_SYNC, get_##_func, set_##_func)
983
984 #define ide_decl_devset(_name) \
985 extern const struct ide_devset ide_devset_##_name
986
987 ide_decl_devset(io_32bit);
988 ide_decl_devset(keepsettings);
989 ide_decl_devset(pio_mode);
990 ide_decl_devset(unmaskirq);
991 ide_decl_devset(using_dma);
992
993 #ifdef CONFIG_IDE_PROC_FS
994 /*
995 * /proc/ide interface
996 */
997
998 #define ide_devset_rw_field(_name, _field) \
999 ide_devset_get(_name, _field); \
1000 ide_devset_set(_name, _field); \
1001 IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name)
1002
1003 #define ide_devset_rw_flag(_name, _field) \
1004 ide_devset_get_flag(_name, _field); \
1005 ide_devset_set_flag(_name, _field); \
1006 IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name)
1007
1008 struct ide_proc_devset {
1009 const char *name;
1010 const struct ide_devset *setting;
1011 int min, max;
1012 int (*mulf)(ide_drive_t *);
1013 int (*divf)(ide_drive_t *);
1014 };
1015
1016 #define __IDE_PROC_DEVSET(_name, _min, _max, _mulf, _divf) { \
1017 .name = __stringify(_name), \
1018 .setting = &ide_devset_##_name, \
1019 .min = _min, \
1020 .max = _max, \
1021 .mulf = _mulf, \
1022 .divf = _divf, \
1023 }
1024
1025 #define IDE_PROC_DEVSET(_name, _min, _max) \
1026 __IDE_PROC_DEVSET(_name, _min, _max, NULL, NULL)
1027
1028 typedef struct {
1029 const char *name;
1030 mode_t mode;
1031 read_proc_t *read_proc;
1032 write_proc_t *write_proc;
1033 } ide_proc_entry_t;
1034
1035 void proc_ide_create(void);
1036 void proc_ide_destroy(void);
1037 void ide_proc_register_port(ide_hwif_t *);
1038 void ide_proc_port_register_devices(ide_hwif_t *);
1039 void ide_proc_unregister_device(ide_drive_t *);
1040 void ide_proc_unregister_port(ide_hwif_t *);
1041 void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
1042 void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
1043
1044 read_proc_t proc_ide_read_capacity;
1045 read_proc_t proc_ide_read_geometry;
1046
1047 /*
1048 * Standard exit stuff:
1049 */
1050 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
1051 { \
1052 len -= off; \
1053 if (len < count) { \
1054 *eof = 1; \
1055 if (len <= 0) \
1056 return 0; \
1057 } else \
1058 len = count; \
1059 *start = page + off; \
1060 return len; \
1061 }
1062 #else
1063 static inline void proc_ide_create(void) { ; }
1064 static inline void proc_ide_destroy(void) { ; }
1065 static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
1066 static inline void ide_proc_port_register_devices(ide_hwif_t *hwif) { ; }
1067 static inline void ide_proc_unregister_device(ide_drive_t *drive) { ; }
1068 static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
1069 static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
1070 static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
1071 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
1072 #endif
1073
1074 enum {
1075 /* enter/exit functions */
1076 IDE_DBG_FUNC = (1 << 0),
1077 /* sense key/asc handling */
1078 IDE_DBG_SENSE = (1 << 1),
1079 /* packet commands handling */
1080 IDE_DBG_PC = (1 << 2),
1081 /* request handling */
1082 IDE_DBG_RQ = (1 << 3),
1083 /* driver probing/setup */
1084 IDE_DBG_PROBE = (1 << 4),
1085 };
1086
1087 /* DRV_NAME has to be defined in the driver before using the macro below */
1088 #define __ide_debug_log(lvl, fmt, args...) \
1089 { \
1090 if (unlikely(drive->debug_mask & lvl)) \
1091 printk(KERN_INFO DRV_NAME ": " fmt, ## args); \
1092 }
1093
1094 /*
1095 * Power Management state machine (rq->pm->pm_step).
1096 *
1097 * For each step, the core calls ide_start_power_step() first.
1098 * This can return:
1099 * - ide_stopped : In this case, the core calls us back again unless
1100 * step have been set to ide_power_state_completed.
1101 * - ide_started : In this case, the channel is left busy until an
1102 * async event (interrupt) occurs.
1103 * Typically, ide_start_power_step() will issue a taskfile request with
1104 * do_rw_taskfile().
1105 *
1106 * Upon reception of the interrupt, the core will call ide_complete_power_step()
1107 * with the error code if any. This routine should update the step value
1108 * and return. It should not start a new request. The core will call
1109 * ide_start_power_step() for the new step value, unless step have been
1110 * set to IDE_PM_COMPLETED.
1111 */
1112 enum {
1113 IDE_PM_START_SUSPEND,
1114 IDE_PM_FLUSH_CACHE = IDE_PM_START_SUSPEND,
1115 IDE_PM_STANDBY,
1116
1117 IDE_PM_START_RESUME,
1118 IDE_PM_RESTORE_PIO = IDE_PM_START_RESUME,
1119 IDE_PM_IDLE,
1120 IDE_PM_RESTORE_DMA,
1121
1122 IDE_PM_COMPLETED,
1123 };
1124
1125 /*
1126 * Subdrivers support.
1127 *
1128 * The gendriver.owner field should be set to the module owner of this driver.
1129 * The gendriver.name field should be set to the name of this driver
1130 */
1131 struct ide_driver_s {
1132 const char *version;
1133 ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
1134 int (*end_request)(ide_drive_t *, int, int);
1135 ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
1136 struct device_driver gen_driver;
1137 int (*probe)(ide_drive_t *);
1138 void (*remove)(ide_drive_t *);
1139 void (*resume)(ide_drive_t *);
1140 void (*shutdown)(ide_drive_t *);
1141 #ifdef CONFIG_IDE_PROC_FS
1142 ide_proc_entry_t * (*proc_entries)(ide_drive_t *);
1143 const struct ide_proc_devset * (*proc_devsets)(ide_drive_t *);
1144 #endif
1145 };
1146
1147 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
1148
1149 int ide_device_get(ide_drive_t *);
1150 void ide_device_put(ide_drive_t *);
1151
1152 struct ide_ioctl_devset {
1153 unsigned int get_ioctl;
1154 unsigned int set_ioctl;
1155 const struct ide_devset *setting;
1156 };
1157
1158 int ide_setting_ioctl(ide_drive_t *, struct block_device *, unsigned int,
1159 unsigned long, const struct ide_ioctl_devset *);
1160
1161 int generic_ide_ioctl(ide_drive_t *, struct block_device *, unsigned, unsigned long);
1162
1163 extern int ide_vlb_clk;
1164 extern int ide_pci_clk;
1165
1166 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
1167 int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
1168 int uptodate, int nr_sectors);
1169
1170 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
1171
1172 void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
1173 ide_expiry_t *);
1174
1175 void ide_execute_pkt_cmd(ide_drive_t *);
1176
1177 void ide_pad_transfer(ide_drive_t *, int, int);
1178
1179 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
1180
1181 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
1182
1183 void ide_fix_driveid(u16 *);
1184
1185 extern void ide_fixstring(u8 *, const int, const int);
1186
1187 int ide_busy_sleep(ide_hwif_t *, unsigned long, int);
1188
1189 int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
1190
1191 extern ide_startstop_t ide_do_reset (ide_drive_t *);
1192
1193 extern int ide_devset_execute(ide_drive_t *drive,
1194 const struct ide_devset *setting, int arg);
1195
1196 extern void ide_do_drive_cmd(ide_drive_t *, struct request *);
1197
1198 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
1199
1200 void ide_tf_dump(const char *, struct ide_taskfile *);
1201
1202 void ide_exec_command(ide_hwif_t *, u8);
1203 u8 ide_read_status(ide_hwif_t *);
1204 u8 ide_read_altstatus(ide_hwif_t *);
1205 u8 ide_read_sff_dma_status(ide_hwif_t *);
1206
1207 void ide_set_irq(ide_hwif_t *, int);
1208
1209 void ide_tf_load(ide_drive_t *, ide_task_t *);
1210 void ide_tf_read(ide_drive_t *, ide_task_t *);
1211
1212 void ide_input_data(ide_drive_t *, struct request *, void *, unsigned int);
1213 void ide_output_data(ide_drive_t *, struct request *, void *, unsigned int);
1214
1215 int ide_io_buffers(ide_drive_t *, struct ide_atapi_pc *, unsigned int, int);
1216
1217 extern void SELECT_DRIVE(ide_drive_t *);
1218 void SELECT_MASK(ide_drive_t *, int);
1219
1220 u8 ide_read_error(ide_drive_t *);
1221 void ide_read_bcount_and_ireason(ide_drive_t *, u16 *, u8 *);
1222
1223 extern int drive_is_ready(ide_drive_t *);
1224
1225 void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);
1226
1227 int ide_check_atapi_device(ide_drive_t *, const char *);
1228
1229 void ide_init_pc(struct ide_atapi_pc *);
1230
1231 /* Disk head parking */
1232 extern wait_queue_head_t ide_park_wq;
1233 ssize_t ide_park_show(struct device *dev, struct device_attribute *attr,
1234 char *buf);
1235 ssize_t ide_park_store(struct device *dev, struct device_attribute *attr,
1236 const char *buf, size_t len);
1237
1238 /*
1239 * Special requests for ide-tape block device strategy routine.
1240 *
1241 * In order to service a character device command, we add special requests to
1242 * the tail of our block device request queue and wait for their completion.
1243 */
1244 enum {
1245 REQ_IDETAPE_PC1 = (1 << 0), /* packet command (first stage) */
1246 REQ_IDETAPE_PC2 = (1 << 1), /* packet command (second stage) */
1247 REQ_IDETAPE_READ = (1 << 2),
1248 REQ_IDETAPE_WRITE = (1 << 3),
1249 };
1250
1251 int ide_queue_pc_tail(ide_drive_t *, struct gendisk *, struct ide_atapi_pc *);
1252
1253 int ide_do_test_unit_ready(ide_drive_t *, struct gendisk *);
1254 int ide_do_start_stop(ide_drive_t *, struct gendisk *, int);
1255 int ide_set_media_lock(ide_drive_t *, struct gendisk *, int);
1256 void ide_create_request_sense_cmd(ide_drive_t *, struct ide_atapi_pc *);
1257 void ide_retry_pc(ide_drive_t *, struct gendisk *);
1258
1259 static inline unsigned long ide_scsi_get_timeout(struct ide_atapi_pc *pc)
1260 {
1261 return max_t(unsigned long, WAIT_CMD, pc->timeout - jiffies);
1262 }
1263
1264 int ide_scsi_expiry(ide_drive_t *);
1265
1266 ide_startstop_t ide_issue_pc(ide_drive_t *, unsigned int, ide_expiry_t *);
1267
1268 ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
1269
1270 void task_end_request(ide_drive_t *, struct request *, u8);
1271
1272 int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *, u16);
1273 int ide_no_data_taskfile(ide_drive_t *, ide_task_t *);
1274
1275 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
1276
1277 extern int ide_driveid_update(ide_drive_t *);
1278 extern int ide_config_drive_speed(ide_drive_t *, u8);
1279 extern u8 eighty_ninty_three (ide_drive_t *);
1280 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
1281
1282 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
1283
1284 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
1285
1286 extern void ide_timer_expiry(unsigned long);
1287 extern irqreturn_t ide_intr(int irq, void *dev_id);
1288 extern void do_ide_request(struct request_queue *);
1289
1290 void ide_init_disk(struct gendisk *, ide_drive_t *);
1291
1292 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1293 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
1294 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
1295 #else
1296 #define ide_pci_register_driver(d) pci_register_driver(d)
1297 #endif
1298
1299 void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int,
1300 hw_regs_t *, hw_regs_t **);
1301 void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
1302
1303 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1304 int ide_pci_set_master(struct pci_dev *, const char *);
1305 unsigned long ide_pci_dma_base(ide_hwif_t *, const struct ide_port_info *);
1306 int ide_pci_check_simplex(ide_hwif_t *, const struct ide_port_info *);
1307 int ide_hwif_setup_dma(ide_hwif_t *, const struct ide_port_info *);
1308 #else
1309 static inline int ide_hwif_setup_dma(ide_hwif_t *hwif,
1310 const struct ide_port_info *d)
1311 {
1312 return -EINVAL;
1313 }
1314 #endif
1315
1316 typedef struct ide_pci_enablebit_s {
1317 u8 reg; /* byte pci reg holding the enable-bit */
1318 u8 mask; /* mask to isolate the enable-bit */
1319 u8 val; /* value of masked reg when "enabled" */
1320 } ide_pci_enablebit_t;
1321
1322 enum {
1323 /* Uses ISA control ports not PCI ones. */
1324 IDE_HFLAG_ISA_PORTS = (1 << 0),
1325 /* single port device */
1326 IDE_HFLAG_SINGLE = (1 << 1),
1327 /* don't use legacy PIO blacklist */
1328 IDE_HFLAG_PIO_NO_BLACKLIST = (1 << 2),
1329 /* set for the second port of QD65xx */
1330 IDE_HFLAG_QD_2ND_PORT = (1 << 3),
1331 /* use PIO8/9 for prefetch off/on */
1332 IDE_HFLAG_ABUSE_PREFETCH = (1 << 4),
1333 /* use PIO6/7 for fast-devsel off/on */
1334 IDE_HFLAG_ABUSE_FAST_DEVSEL = (1 << 5),
1335 /* use 100-102 and 200-202 PIO values to set DMA modes */
1336 IDE_HFLAG_ABUSE_DMA_MODES = (1 << 6),
1337 /*
1338 * keep DMA setting when programming PIO mode, may be used only
1339 * for hosts which have separate PIO and DMA timings (ie. PMAC)
1340 */
1341 IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
1342 /* program host for the transfer mode after programming device */
1343 IDE_HFLAG_POST_SET_MODE = (1 << 8),
1344 /* don't program host/device for the transfer mode ("smart" hosts) */
1345 IDE_HFLAG_NO_SET_MODE = (1 << 9),
1346 /* trust BIOS for programming chipset/device for DMA */
1347 IDE_HFLAG_TRUST_BIOS_FOR_DMA = (1 << 10),
1348 /* host is CS5510/CS5520 */
1349 IDE_HFLAG_CS5520 = (1 << 11),
1350 /* ATAPI DMA is unsupported */
1351 IDE_HFLAG_NO_ATAPI_DMA = (1 << 12),
1352 /* set if host is a "non-bootable" controller */
1353 IDE_HFLAG_NON_BOOTABLE = (1 << 13),
1354 /* host doesn't support DMA */
1355 IDE_HFLAG_NO_DMA = (1 << 14),
1356 /* check if host is PCI IDE device before allowing DMA */
1357 IDE_HFLAG_NO_AUTODMA = (1 << 15),
1358 /* host uses MMIO */
1359 IDE_HFLAG_MMIO = (1 << 16),
1360 /* no LBA48 */
1361 IDE_HFLAG_NO_LBA48 = (1 << 17),
1362 /* no LBA48 DMA */
1363 IDE_HFLAG_NO_LBA48_DMA = (1 << 18),
1364 /* data FIFO is cleared by an error */
1365 IDE_HFLAG_ERROR_STOPS_FIFO = (1 << 19),
1366 /* serialize ports */
1367 IDE_HFLAG_SERIALIZE = (1 << 20),
1368 /* use legacy IRQs */
1369 IDE_HFLAG_LEGACY_IRQS = (1 << 21),
1370 /* force use of legacy IRQs */
1371 IDE_HFLAG_FORCE_LEGACY_IRQS = (1 << 22),
1372 /* limit LBA48 requests to 256 sectors */
1373 IDE_HFLAG_RQSIZE_256 = (1 << 23),
1374 /* use 32-bit I/O ops */
1375 IDE_HFLAG_IO_32BIT = (1 << 24),
1376 /* unmask IRQs */
1377 IDE_HFLAG_UNMASK_IRQS = (1 << 25),
1378 /* serialize ports if DMA is possible (for sl82c105) */
1379 IDE_HFLAG_SERIALIZE_DMA = (1 << 27),
1380 /* force host out of "simplex" mode */
1381 IDE_HFLAG_CLEAR_SIMPLEX = (1 << 28),
1382 /* DSC overlap is unsupported */
1383 IDE_HFLAG_NO_DSC = (1 << 29),
1384 /* never use 32-bit I/O ops */
1385 IDE_HFLAG_NO_IO_32BIT = (1 << 30),
1386 /* never unmask IRQs */
1387 IDE_HFLAG_NO_UNMASK_IRQS = (1 << 31),
1388 };
1389
1390 #ifdef CONFIG_BLK_DEV_OFFBOARD
1391 # define IDE_HFLAG_OFF_BOARD 0
1392 #else
1393 # define IDE_HFLAG_OFF_BOARD IDE_HFLAG_NON_BOOTABLE
1394 #endif
1395
1396 struct ide_port_info {
1397 char *name;
1398 unsigned int (*init_chipset)(struct pci_dev *);
1399 void (*init_iops)(ide_hwif_t *);
1400 void (*init_hwif)(ide_hwif_t *);
1401 int (*init_dma)(ide_hwif_t *,
1402 const struct ide_port_info *);
1403
1404 const struct ide_tp_ops *tp_ops;
1405 const struct ide_port_ops *port_ops;
1406 const struct ide_dma_ops *dma_ops;
1407
1408 ide_pci_enablebit_t enablebits[2];
1409 hwif_chipset_t chipset;
1410 u32 host_flags;
1411 u8 pio_mask;
1412 u8 swdma_mask;
1413 u8 mwdma_mask;
1414 u8 udma_mask;
1415 };
1416
1417 int ide_pci_init_one(struct pci_dev *, const struct ide_port_info *, void *);
1418 int ide_pci_init_two(struct pci_dev *, struct pci_dev *,
1419 const struct ide_port_info *, void *);
1420 void ide_pci_remove(struct pci_dev *);
1421
1422 #ifdef CONFIG_PM
1423 int ide_pci_suspend(struct pci_dev *, pm_message_t);
1424 int ide_pci_resume(struct pci_dev *);
1425 #else
1426 #define ide_pci_suspend NULL
1427 #define ide_pci_resume NULL
1428 #endif
1429
1430 void ide_map_sg(ide_drive_t *, struct request *);
1431 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1432
1433 #define BAD_DMA_DRIVE 0
1434 #define GOOD_DMA_DRIVE 1
1435
1436 struct drive_list_entry {
1437 const char *id_model;
1438 const char *id_firmware;
1439 };
1440
1441 int ide_in_drive_list(u16 *, const struct drive_list_entry *);
1442
1443 #ifdef CONFIG_BLK_DEV_IDEDMA
1444 int ide_dma_good_drive(ide_drive_t *);
1445 int __ide_dma_bad_drive(ide_drive_t *);
1446 int ide_id_dma_bug(ide_drive_t *);
1447
1448 u8 ide_find_dma_mode(ide_drive_t *, u8);
1449
1450 static inline u8 ide_max_dma_mode(ide_drive_t *drive)
1451 {
1452 return ide_find_dma_mode(drive, XFER_UDMA_6);
1453 }
1454
1455 void ide_dma_off_quietly(ide_drive_t *);
1456 void ide_dma_off(ide_drive_t *);
1457 void ide_dma_on(ide_drive_t *);
1458 int ide_set_dma(ide_drive_t *);
1459 void ide_check_dma_crc(ide_drive_t *);
1460 ide_startstop_t ide_dma_intr(ide_drive_t *);
1461
1462 int ide_allocate_dma_engine(ide_hwif_t *);
1463 void ide_release_dma_engine(ide_hwif_t *);
1464
1465 int ide_build_sglist(ide_drive_t *, struct request *);
1466 void ide_destroy_dmatable(ide_drive_t *);
1467
1468 #ifdef CONFIG_BLK_DEV_IDEDMA_SFF
1469 int config_drive_for_dma(ide_drive_t *);
1470 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1471 void ide_dma_host_set(ide_drive_t *, int);
1472 extern int ide_dma_setup(ide_drive_t *);
1473 void ide_dma_exec_cmd(ide_drive_t *, u8);
1474 extern void ide_dma_start(ide_drive_t *);
1475 int ide_dma_end(ide_drive_t *);
1476 int ide_dma_test_irq(ide_drive_t *);
1477 extern const struct ide_dma_ops sff_dma_ops;
1478 #else
1479 static inline int config_drive_for_dma(ide_drive_t *drive) { return 0; }
1480 #endif /* CONFIG_BLK_DEV_IDEDMA_SFF */
1481
1482 void ide_dma_lost_irq(ide_drive_t *);
1483 void ide_dma_timeout(ide_drive_t *);
1484
1485 #else
1486 static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; }
1487 static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
1488 static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
1489 static inline void ide_dma_off_quietly(ide_drive_t *drive) { ; }
1490 static inline void ide_dma_off(ide_drive_t *drive) { ; }
1491 static inline void ide_dma_on(ide_drive_t *drive) { ; }
1492 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1493 static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
1494 static inline void ide_check_dma_crc(ide_drive_t *drive) { ; }
1495 static inline void ide_release_dma_engine(ide_hwif_t *hwif) { ; }
1496 #endif /* CONFIG_BLK_DEV_IDEDMA */
1497
1498 #ifdef CONFIG_BLK_DEV_IDEACPI
1499 extern int ide_acpi_exec_tfs(ide_drive_t *drive);
1500 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
1501 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
1502 extern void ide_acpi_init(ide_hwif_t *hwif);
1503 void ide_acpi_port_init_devices(ide_hwif_t *);
1504 extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
1505 #else
1506 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
1507 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
1508 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
1509 static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
1510 static inline void ide_acpi_port_init_devices(ide_hwif_t *hwif) { ; }
1511 static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
1512 #endif
1513
1514 void ide_remove_port_from_hwgroup(ide_hwif_t *);
1515 void ide_unregister(ide_hwif_t *);
1516
1517 void ide_register_region(struct gendisk *);
1518 void ide_unregister_region(struct gendisk *);
1519
1520 void ide_undecoded_slave(ide_drive_t *);
1521
1522 void ide_port_apply_params(ide_hwif_t *);
1523
1524 struct ide_host *ide_host_alloc(const struct ide_port_info *, hw_regs_t **);
1525 void ide_host_free(struct ide_host *);
1526 int ide_host_register(struct ide_host *, const struct ide_port_info *,
1527 hw_regs_t **);
1528 int ide_host_add(const struct ide_port_info *, hw_regs_t **,
1529 struct ide_host **);
1530 void ide_host_remove(struct ide_host *);
1531 int ide_legacy_device_add(const struct ide_port_info *, unsigned long);
1532 void ide_port_unregister_devices(ide_hwif_t *);
1533 void ide_port_scan(ide_hwif_t *);
1534
1535 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1536 {
1537 return hwif->hwif_data;
1538 }
1539
1540 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1541 {
1542 hwif->hwif_data = data;
1543 }
1544
1545 const char *ide_xfer_verbose(u8 mode);
1546 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1547 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1548
1549 u64 ide_get_lba_addr(struct ide_taskfile *, int);
1550 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1551
1552 struct ide_timing {
1553 u8 mode;
1554 u8 setup; /* t1 */
1555 u16 act8b; /* t2 for 8-bit io */
1556 u16 rec8b; /* t2i for 8-bit io */
1557 u16 cyc8b; /* t0 for 8-bit io */
1558 u16 active; /* t2 or tD */
1559 u16 recover; /* t2i or tK */
1560 u16 cycle; /* t0 */
1561 u16 udma; /* t2CYCTYP/2 */
1562 };
1563
1564 enum {
1565 IDE_TIMING_SETUP = (1 << 0),
1566 IDE_TIMING_ACT8B = (1 << 1),
1567 IDE_TIMING_REC8B = (1 << 2),
1568 IDE_TIMING_CYC8B = (1 << 3),
1569 IDE_TIMING_8BIT = IDE_TIMING_ACT8B | IDE_TIMING_REC8B |
1570 IDE_TIMING_CYC8B,
1571 IDE_TIMING_ACTIVE = (1 << 4),
1572 IDE_TIMING_RECOVER = (1 << 5),
1573 IDE_TIMING_CYCLE = (1 << 6),
1574 IDE_TIMING_UDMA = (1 << 7),
1575 IDE_TIMING_ALL = IDE_TIMING_SETUP | IDE_TIMING_8BIT |
1576 IDE_TIMING_ACTIVE | IDE_TIMING_RECOVER |
1577 IDE_TIMING_CYCLE | IDE_TIMING_UDMA,
1578 };
1579
1580 struct ide_timing *ide_timing_find_mode(u8);
1581 u16 ide_pio_cycle_time(ide_drive_t *, u8);
1582 void ide_timing_merge(struct ide_timing *, struct ide_timing *,
1583 struct ide_timing *, unsigned int);
1584 int ide_timing_compute(ide_drive_t *, u8, struct ide_timing *, int, int);
1585
1586 int ide_scan_pio_blacklist(char *);
1587
1588 u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
1589
1590 int ide_set_pio_mode(ide_drive_t *, u8);
1591 int ide_set_dma_mode(ide_drive_t *, u8);
1592
1593 void ide_set_pio(ide_drive_t *, u8);
1594
1595 static inline void ide_set_max_pio(ide_drive_t *drive)
1596 {
1597 ide_set_pio(drive, 255);
1598 }
1599
1600 extern spinlock_t ide_lock;
1601 extern struct mutex ide_cfg_mtx;
1602 /*
1603 * Structure locking:
1604 *
1605 * ide_cfg_mtx and ide_lock together protect changes to
1606 * ide_hwif_t->{next,hwgroup}
1607 * ide_drive_t->next
1608 *
1609 * ide_hwgroup_t->busy: ide_lock
1610 * ide_hwgroup_t->hwif: ide_lock
1611 * ide_hwif_t->mate: constant, no locking
1612 * ide_drive_t->hwif: constant, no locking
1613 */
1614
1615 #define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
1616
1617 extern struct bus_type ide_bus_type;
1618 extern struct class *ide_port_class;
1619
1620 static inline void ide_dump_identify(u8 *id)
1621 {
1622 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 2, id, 512, 0);
1623 }
1624
1625 static inline int hwif_to_node(ide_hwif_t *hwif)
1626 {
1627 return hwif->dev ? dev_to_node(hwif->dev) : -1;
1628 }
1629
1630 static inline ide_drive_t *ide_get_pair_dev(ide_drive_t *drive)
1631 {
1632 ide_drive_t *peer = &drive->hwif->drives[(drive->dn ^ 1) & 1];
1633
1634 return (peer->dev_flags & IDE_DFLAG_PRESENT) ? peer : NULL;
1635 }
1636 #endif /* _IDE_H */
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