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1.1 root 1: /*
2: * linux/drivers/block/ide.c Version 5.53 Jun 24, 1997
3: *
4: * Copyright (C) 1994-1996 Linus Torvalds & authors (see below)
5: */
6: #define _IDE_C /* needed by <linux/blk.h> */
7:
8: /*
9: * Maintained by Mark Lord <[email protected]>
10: * and Gadi Oxman <[email protected]>
11: *
12: * This is the multiple IDE interface driver, as evolved from hd.c.
13: * It supports up to four IDE interfaces, on one or more IRQs (usually 14 & 15).
14: * There can be up to two drives per interface, as per the ATA-2 spec.
15: *
16: * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64
17: * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
18: * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
19: * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
20: *
21: * It is easy to extend ide.c to handle more than four interfaces:
22: *
23: * Change the MAX_HWIFS constant in ide.h.
24: *
25: * Define some new major numbers (in major.h), and insert them into
26: * the ide_hwif_to_major table in ide.c.
27: *
28: * Fill in the extra values for the new interfaces into the two tables
29: * inside ide.c: default_io_base[] and default_irqs[].
30: *
31: * Create the new request handlers by cloning "do_ide3_request()"
32: * for each new interface, and add them to the switch statement
33: * in the ide_init() function in ide.c.
34: *
35: * Recompile, create the new /dev/ entries, and it will probably work.
36: *
37: * From hd.c:
38: * |
39: * | It traverses the request-list, using interrupts to jump between functions.
40: * | As nearly all functions can be called within interrupts, we may not sleep.
41: * | Special care is recommended. Have Fun!
42: * |
43: * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
44: * |
45: * | Thanks to Branko Lankester, [email protected], who found a bug
46: * | in the early extended-partition checks and added DM partitions.
47: * |
48: * | Early work on error handling by Mika Liljeberg ([email protected]).
49: * |
50: * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
51: * | and general streamlining by Mark Lord ([email protected]).
52: *
53: * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
54: *
55: * Mark Lord ([email protected]) (IDE Perf.Pkg)
56: * Delman Lee ([email protected]) ("Mr. atdisk2")
57: * Scott Snyder ([email protected]) (ATAPI IDE cd-rom)
58: *
59: * This was a rewrite of just about everything from hd.c, though some original
60: * code is still sprinkled about. Think of it as a major evolution, with
61: * inspiration from lots of linux users, esp. [email protected]
62: *
63: * Version 1.0 ALPHA initial code, primary i/f working okay
64: * Version 1.3 BETA dual i/f on shared irq tested & working!
65: * Version 1.4 BETA added auto probing for irq(s)
66: * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms,
67: * ...
68: * Version 3.5 correct the bios_cyl field if it's too small
69: * (linux 1.1.76) (to help fdisk with brain-dead BIOSs)
70: * Version 3.6 cosmetic corrections to comments and stuff
71: * (linux 1.1.77) reorganise probing code to make it understandable
72: * added halfway retry to probing for drive identification
73: * added "hdx=noprobe" command line option
74: * allow setting multmode even when identification fails
75: * Version 3.7 move set_geometry=1 from do_identify() to ide_init()
76: * increase DRQ_WAIT to eliminate nuisance messages
77: * wait for DRQ_STAT instead of DATA_READY during probing
78: * (courtesy of Gary Thomas [email protected])
79: * Version 3.8 fixed byte-swapping for confused Mitsumi cdrom drives
80: * update of ide-cd.c from Scott, allows blocksize=1024
81: * cdrom probe fixes, inspired by [email protected]
82: * Version 3.9 don't use LBA if lba_capacity looks funny
83: * correct the drive capacity calculations
84: * fix probing for old Seagates without IDE_ALTSTATUS_REG
85: * fix byte-ordering for some NEC cdrom drives
86: * Version 3.10 disable multiple mode by default; was causing trouble
87: * Version 3.11 fix mis-identification of old WD disks as cdroms
88: * Version 3,12 simplify logic for selecting initial mult_count
89: * (fixes problems with buggy WD drives)
90: * Version 3.13 remove excess "multiple mode disabled" messages
91: * Version 3.14 fix ide_error() handling of BUSY_STAT
92: * fix byte-swapped cdrom strings (again.. arghh!)
93: * ignore INDEX bit when checking the ALTSTATUS reg
94: * Version 3.15 add SINGLE_THREADED flag for use with dual-CMD i/f
95: * ignore WRERR_STAT for non-write operations
96: * added vlb_sync support for DC-2000A & others,
97: * (incl. some Promise chips), courtesy of Frank Gockel
98: * Version 3.16 convert vlb_32bit and vlb_sync into runtime flags
99: * add ioctls to get/set VLB flags (HDIO_[SG]ET_CHIPSET)
100: * rename SINGLE_THREADED to SUPPORT_SERIALIZE,
101: * add boot flag to "serialize" operation for CMD i/f
102: * add optional support for DTC2278 interfaces,
103: * courtesy of [email protected] (Dyan Wile).
104: * add boot flag to enable "dtc2278" probe
105: * add probe to avoid EATA (SCSI) interfaces,
106: * courtesy of [email protected].
107: * Version 4.00 tidy up verify_area() calls - [email protected]
108: * add flag to ignore WRERR_STAT for some drives
109: * courtesy of [email protected]
110: * assembly syntax tweak to vlb_sync
111: * removable drive support from [email protected]
112: * add transparent support for DiskManager-6.0x "Dynamic
113: * Disk Overlay" (DDO), most of this is in genhd.c
114: * eliminate "multiple mode turned off" message at boot
115: * Version 4.10 fix bug in ioctl for "hdparm -c3"
116: * fix DM6:DDO support -- now works with LILO, fdisk, ...
117: * don't treat some naughty WD drives as removable
118: * Version 4.11 updated DM6 support using info provided by OnTrack
119: * Version 5.00 major overhaul, multmode setting fixed, vlb_sync fixed
120: * added support for 3rd/4th/alternative IDE ports
121: * created ide.h; ide-cd.c now compiles separate from ide.c
122: * hopefully fixed infinite "unexpected_intr" from cdroms
123: * zillions of other changes and restructuring
124: * somehow reduced overall memory usage by several kB
125: * probably slowed things down slightly, but worth it
126: * Version 5.01 AT LAST!! Finally understood why "unexpected_intr"
127: * was happening at various times/places: whenever the
128: * ide-interface's ctl_port was used to "mask" the irq,
129: * it also would trigger an edge in the process of masking
130: * which would result in a self-inflicted interrupt!!
131: * (such a stupid way to build a hardware interrupt mask).
132: * This is now fixed (after a year of head-scratching).
133: * Version 5.02 got rid of need for {enable,disable}_irq_list()
134: * Version 5.03 tune-ups, comments, remove "busy wait" from drive resets
135: * removed PROBE_FOR_IRQS option -- no longer needed
136: * OOOPS! fixed "bad access" bug for 2nd drive on an i/f
137: * Version 5.04 changed "ira %d" to "irq %d" in DEBUG message
138: * added more comments, cleaned up unexpected_intr()
139: * OOOPS! fixed null pointer problem in ide reset code
140: * added autodetect for Triton chipset -- no effect yet
141: * Version 5.05 OOOPS! fixed bug in revalidate_disk()
142: * OOOPS! fixed bug in ide_do_request()
143: * added ATAPI reset sequence for cdroms
144: * Version 5.10 added Bus-Mastered DMA support for Triton Chipset
145: * some (mostly) cosmetic changes
146: * Version 5.11 added ht6560b support by [email protected]
147: * reworked PCI scanning code
148: * added automatic RZ1000 detection/support
149: * added automatic PCI CMD640 detection/support
150: * added option for VLB CMD640 support
151: * tweaked probe to find cdrom on hdb with disks on hda,hdc
152: * Version 5.12 some performance tuning
153: * added message to alert user to bad /dev/hd[cd] entries
154: * OOOPS! fixed bug in atapi reset
155: * driver now forces "serialize" again for all cmd640 chips
156: * noticed REALLY_SLOW_IO had no effect, moved it to ide.c
157: * made do_drive_cmd() into public ide_do_drive_cmd()
158: * Version 5.13 fixed typo ('B'), thanks to [email protected]
159: * fixed ht6560b support
160: * Version 5.13b (sss) fix problem in calling ide_cdrom_setup()
161: * don't bother invalidating nonexistent partitions
162: * Version 5.14 fixes to cmd640 support.. maybe it works now(?)
163: * added & tested full EZ-DRIVE support -- don't use LILO!
164: * don't enable 2nd CMD640 PCI port during init - conflict
165: * Version 5.15 bug fix in init_cmd640_vlb()
166: * bug fix in interrupt sharing code
167: * Version 5.16 ugh.. fix "serialize" support, broken in 5.15
168: * remove "Huh?" from cmd640 code
169: * added qd6580 interface speed select from Colten Edwards
170: * Version 5.17 kludge around bug in BIOS32 on Intel triton motherboards
171: * Version 5.18 new CMD640 code, moved to cmd640.c, #include'd for now
172: * new UMC8672 code, moved to umc8672.c, #include'd for now
173: * disallow turning on DMA when h/w not capable of DMA
174: * Version 5.19 fix potential infinite timeout on resets
175: * extend reset poll into a general purpose polling scheme
176: * add atapi tape drive support from Gadi Oxman
177: * simplify exit from _intr routines -- no IDE_DO_REQUEST
178: * Version 5.20 leave current rq on blkdev request list during I/O
179: * generalized ide_do_drive_cmd() for tape/cdrom driver use
180: * Version 5.21 fix nasty cdrom/tape bug (ide_preempt was messed up)
181: * Version 5.22 fix ide_xlate_1024() to work with/without drive->id
182: * Version 5.23 miscellaneous touch-ups
183: * Version 5.24 fix #if's for SUPPORT_CMD640
184: * Version 5.25 more touch-ups, fix cdrom resets, ...
185: * cmd640.c now configs/compiles separate from ide.c
186: * Version 5.26 keep_settings now maintains the using_dma flag
187: * fix [EZD] remap message to only output at boot time
188: * fix "bad /dev/ entry" message to say hdc, not hdc0
189: * fix ide_xlate_1024() to respect user specified CHS
190: * use CHS from partn table if it looks translated
191: * re-merged flags chipset,vlb_32bit,vlb_sync into io_32bit
192: * keep track of interface chipset type, when known
193: * add generic PIO mode "tuneproc" mechanism
194: * fix cmd640_vlb option
195: * fix ht6560b support (was completely broken)
196: * umc8672.c now configures/compiles separate from ide.c
197: * move dtc2278 support to dtc2278.c
198: * move ht6560b support to ht6560b.c
199: * move qd6580 support to qd6580.c
200: * add ali14xx support in ali14xx.c
201: * Version 5.27 add [no]autotune parameters to help cmd640
202: * move rz1000 support to rz1000.c
203: * Version 5.28 #include "ide_modes.h"
204: * fix disallow_unmask: now per-interface "no_unmask" bit
205: * force io_32bit to be the same on drive pairs of dtc2278
206: * improved IDE tape error handling, and tape DMA support
207: * bugfix in ide_do_drive_cmd() for cdroms + serialize
208: * Version 5.29 fixed non-IDE check for too many physical heads
209: * don't use LBA if capacity is smaller than CHS
210: * Version 5.30 remove real_devices kludge, formerly used by genhd.c
211: * Version 5.32 change "KB" to "kB"
212: * fix serialize (was broken in kernel 1.3.72)
213: * add support for "hdparm -I"
214: * use common code for disk/tape/cdrom IDE_DRIVE_CMDs
215: * add support for Promise DC4030VL caching card
216: * improved serialize support
217: * put partition check back into alphabetical order
218: * add config option for PCMCIA baggage
219: * try to make PCMCIA support safer to use
220: * improve security on ioctls(): all are suser() only
221: * Version 5.33 improve handling of HDIO_DRIVE_CMDs that read data
222: * Version 5.34 fix irq-sharing problem from 5.33
223: * fix cdrom ioctl problem from 5.33
224: * Version 5.35 cosmetic changes
225: * fix cli() problem in try_to_identify()
226: * Version 5.36 fixes to optional PCMCIA support
227: * Version 5.37 don't use DMA when "noautotune" is specified
228: * Version 5.37a (go) fix shared irq probing (was broken in kernel 1.3.72)
229: * call unplug_device() from ide_do_drive_cmd()
230: * Version 5.38 add "hdx=none" option, courtesy of Joel Maslak
231: * mask drive irq after use, if sharing with another hwif
232: * add code to help debug weird cmd640 problems
233: * Version 5.39 fix horrible error in earlier irq sharing "fix"
234: * Version 5.40 fix serialization -- was broken in 5.39
235: * help sharing by masking device irq after probing
236: * Version 5.41 more fixes to irq sharing/serialize detection
237: * disable io_32bit by default on drive reset
238: * Version 5.42 simplify irq-masking after probe
239: * fix NULL pointer deref in save_match()
240: * Version 5.43 Ugh.. unexpected_intr is back: try to exterminate it
241: * Version 5.44 Fix for "irq probe failed" on cmd640
242: * change path on message regarding MAKEDEV.ide
243: * add a throttle to the unexpected_intr() messages
244: * Version 5.45 fix ugly parameter parsing bugs (thanks Derek)
245: * include Gadi's magic fix for cmd640 unexpected_intr
246: * include mc68000 patches from Geert Uytterhoeven
247: * add Gadi's fix for PCMCIA cdroms
248: * Version 5.46 remove the mc68000 #ifdefs for 2.0.x
249: * Version 5.47 fix set_tune race condition
250: * fix bug in earlier PCMCIA cdrom update
251: * Version 5.48 if def'd, invoke CMD640_DUMP_REGS when irq probe fails
252: * lengthen the do_reset1() pulse, for laptops
253: * add idebus=xx parameter for cmd640 and ali chipsets
254: * no_unmask flag now per-drive instead of per-hwif
255: * fix tune_req so that it gets done immediately
256: * fix missing restore_flags() in ide_ioctl
257: * prevent use of io_32bit on cmd640 with no prefetch
258: * Version 5.49 fix minor quirks in probing routines
259: * Version 5.50 allow values as small as 20 for idebus=
260: * Version 5.51 force non io_32bit in drive_cmd_intr()
261: * change delay_10ms() to delay_50ms() to fix problems
262: * Version 5.52 fix incorrect invalidation of removable devices
263: * add "hdx=slow" command line option
264: * Version 5.53 add ATAPI floppy drive support
265: * change default media for type 0 to floppy
266: * add support for Exabyte Nest
267: * add missing set_blocksize() in revalidate_disk()
268: * handle bad status bit sequencing in ide_wait_stat()
269: * support partition table translations with 255 heads
270: * probe all interfaces by default
271: * add probe for the i82371AB chipset
272: * acknowledge media change on removable drives
273: * add work-around for BMI drives
274: * remove "LBA" from boot messages
275: * Version 5.53.1 add UDMA "CRC retry" support
276: * Version 5.53.2 add Promise/33 auto-detection and DMA support
277: * fix MC_ERR handling
278: * fix mis-detection of NEC cdrom as floppy
279: * issue ATAPI reset and re-probe after "no response"
280: *
281: * Some additional driver compile-time options are in ide.h
282: *
283: * To do, in likely order of completion:
284: * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
285: */
286:
287: #undef REALLY_SLOW_IO /* most systems can safely undef this */
288:
289: #include <linux/config.h>
290: #include <linux/types.h>
291: #include <linux/string.h>
292: #include <linux/kernel.h>
293: #include <linux/delay.h>
294: #include <linux/timer.h>
295: #include <linux/mm.h>
296: #include <linux/ioport.h>
297: #include <linux/interrupt.h>
298: #include <linux/major.h>
299: #include <linux/blkdev.h>
300: #include <linux/errno.h>
301: #include <linux/hdreg.h>
302: #include <linux/genhd.h>
303: #include <linux/malloc.h>
304:
1.1.1.2 root 305: #include <ahci.h>
306:
1.1 root 307: #include <asm/byteorder.h>
308: #include <asm/irq.h>
309: #include <asm/segment.h>
310: #include <asm/io.h>
311:
312: #ifdef CONFIG_PCI
313: #include <linux/bios32.h>
314: #include <linux/pci.h>
315: #endif /* CONFIG_PCI */
316:
317: #include "ide.h"
318: #include "ide_modes.h"
319:
320: #ifdef CONFIG_BLK_DEV_PROMISE
321: #include "promise.h"
322: #define IS_PROMISE_DRIVE (HWIF(drive)->chipset == ide_promise)
323: #else
324: #define IS_PROMISE_DRIVE (0) /* auto-NULLs out Promise code */
325: #endif /* CONFIG_BLK_DEV_PROMISE */
326:
327: static const byte ide_hwif_to_major[MAX_HWIFS] = {IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR};
1.1.1.4 ! root 328: static unsigned short default_io_base[MAX_HWIFS] = {0x1f0, 0x170, 0x1e8, 0x168};
1.1 root 329: static const byte default_irqs[MAX_HWIFS] = {14, 15, 11, 10};
330: static int idebus_parameter; /* holds the "idebus=" parameter */
331: static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
332:
333: /*
334: * This is declared extern in ide.h, for access by other IDE modules:
335: */
336: ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
337:
338: #if (DISK_RECOVERY_TIME > 0)
339: /*
340: * For really screwy hardware (hey, at least it *can* be used with Linux)
341: * we can enforce a minimum delay time between successive operations.
342: */
343: static unsigned long read_timer(void)
344: {
345: unsigned long t, flags;
346: int i;
347:
348: save_flags(flags);
349: cli();
350: t = jiffies * 11932;
351: outb_p(0, 0x43);
352: i = inb_p(0x40);
353: i |= inb(0x40) << 8;
354: restore_flags(flags);
355: return (t - i);
356: }
357:
358: static void set_recovery_timer (ide_hwif_t *hwif)
359: {
360: hwif->last_time = read_timer();
361: }
362: #define SET_RECOVERY_TIMER(drive) set_recovery_timer (drive)
363:
364: #else
365:
366: #define SET_RECOVERY_TIMER(drive)
367:
368: #endif /* DISK_RECOVERY_TIME */
369:
1.1.1.4 ! root 370: /* Called by other drivers to disable the legacy IDE driver on a given IDE base. */
! 371: void ide_disable_base(unsigned base)
! 372: {
! 373: unsigned i;
! 374: for (i = 0; i < MAX_HWIFS; i++)
! 375: if (default_io_base[i] == base)
! 376: default_io_base[i] = 0;
! 377: }
! 378:
1.1 root 379:
380: /*
381: * Do not even *think* about calling this!
382: */
383: static void init_hwif_data (unsigned int index)
384: {
385: byte *p;
386: unsigned int unit;
387: ide_hwif_t *hwif = &ide_hwifs[index];
388:
389: /* bulk initialize hwif & drive info with zeros */
390: p = ((byte *) hwif) + sizeof(ide_hwif_t);
391: do {
392: *--p = 0;
393: } while (p > (byte *) hwif);
394:
395: /* fill in any non-zero initial values */
396: hwif->index = index;
397: hwif->io_base = default_io_base[index];
398: hwif->ctl_port = hwif->io_base ? hwif->io_base+0x206 : 0x000;
399: #ifdef CONFIG_BLK_DEV_HD
400: if (hwif->io_base == HD_DATA)
401: hwif->noprobe = 1; /* may be overridden by ide_setup() */
402: #endif /* CONFIG_BLK_DEV_HD */
403: hwif->major = ide_hwif_to_major[index];
404: hwif->name[0] = 'i';
405: hwif->name[1] = 'd';
406: hwif->name[2] = 'e';
407: hwif->name[3] = '0' + index;
408: #ifdef CONFIG_BLK_DEV_IDETAPE
409: hwif->tape_drive = NULL;
410: #endif /* CONFIG_BLK_DEV_IDETAPE */
411: for (unit = 0; unit < MAX_DRIVES; ++unit) {
412: ide_drive_t *drive = &hwif->drives[unit];
413:
414: drive->select.all = (unit<<4)|0xa0;
415: drive->hwif = hwif;
416: drive->ctl = 0x08;
417: drive->ready_stat = READY_STAT;
418: drive->bad_wstat = BAD_W_STAT;
419: drive->special.b.recalibrate = 1;
420: drive->special.b.set_geometry = 1;
421: drive->name[0] = 'h';
422: drive->name[1] = 'd';
1.1.1.2 root 423: #ifdef MACH
424: drive->name[2] = '0' + (index * MAX_DRIVES) + unit;
425: #else
1.1 root 426: drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
1.1.1.2 root 427: #endif
1.1 root 428: }
429: }
430:
431: /*
432: * init_ide_data() sets reasonable default values into all fields
433: * of all instances of the hwifs and drives, but only on the first call.
434: * Subsequent calls have no effect (they don't wipe out anything).
435: *
436: * This routine is normally called at driver initialization time,
437: * but may also be called MUCH earlier during kernel "command-line"
438: * parameter processing. As such, we cannot depend on any other parts
439: * of the kernel (such as memory allocation) to be functioning yet.
440: *
441: * This is too bad, as otherwise we could dynamically allocate the
442: * ide_drive_t structs as needed, rather than always consuming memory
443: * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
444: */
445: #define MAGIC_COOKIE 0x12345678
446: static void init_ide_data (void)
447: {
448: unsigned int index;
449: static unsigned long magic_cookie = MAGIC_COOKIE;
450:
451: if (magic_cookie != MAGIC_COOKIE)
452: return; /* already initialized */
453: magic_cookie = 0;
454:
455: for (index = 0; index < MAX_HWIFS; ++index)
456: init_hwif_data(index);
457:
458: idebus_parameter = 0;
459: system_bus_speed = 0;
460: }
461:
462: /*
463: * ide_system_bus_speed() returns what we think is the system VESA/PCI
464: * bus speed (in Mhz). This is used for calculating interface PIO timings.
465: * The default is 40 for known PCI systems, 50 otherwise.
466: * The "idebus=xx" parameter can be used to override this value.
467: * The actual value to be used is computed/displayed the first time through.
468: */
469: int ide_system_bus_speed (void)
470: {
471: if (!system_bus_speed) {
472: if (idebus_parameter)
473: system_bus_speed = idebus_parameter; /* user supplied value */
474: #ifdef CONFIG_PCI
475: else if (pcibios_present())
476: system_bus_speed = 40; /* safe default value for PCI */
477: #endif /* CONFIG_PCI */
478: else
479: system_bus_speed = 50; /* safe default value for VESA and PCI */
480: printk("ide: Assuming %dMhz system bus speed for PIO modes; override with idebus=xx\n", system_bus_speed);
481: }
482: return system_bus_speed;
483: }
484:
485: #if SUPPORT_VLB_SYNC
486: /*
487: * Some localbus EIDE interfaces require a special access sequence
488: * when using 32-bit I/O instructions to transfer data. We call this
489: * the "vlb_sync" sequence, which consists of three successive reads
490: * of the sector count register location, with interrupts disabled
491: * to ensure that the reads all happen together.
492: */
493: static inline void do_vlb_sync (unsigned short port) {
494: (void) inb (port);
495: (void) inb (port);
496: (void) inb (port);
497: }
498: #endif /* SUPPORT_VLB_SYNC */
499:
500: /*
501: * This is used for most PIO data transfers *from* the IDE interface
502: */
503: void ide_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount)
504: {
505: unsigned short io_base = HWIF(drive)->io_base;
506: unsigned short data_reg = io_base+IDE_DATA_OFFSET;
507: byte io_32bit = drive->io_32bit;
508:
509: if (io_32bit) {
510: #if SUPPORT_VLB_SYNC
511: if (io_32bit & 2) {
512: cli();
513: do_vlb_sync(io_base+IDE_NSECTOR_OFFSET);
514: insl(data_reg, buffer, wcount);
515: if (drive->unmask)
516: sti();
517: } else
518: #endif /* SUPPORT_VLB_SYNC */
519: insl(data_reg, buffer, wcount);
520: } else {
521: #if SUPPORT_SLOW_DATA_PORTS
522: if (drive->slow) {
523: unsigned short *ptr = (unsigned short *) buffer;
524: while (wcount--) {
525: *ptr++ = inw_p(data_reg);
526: *ptr++ = inw_p(data_reg);
527: }
528: } else
529: #endif /* SUPPORT_SLOW_DATA_PORTS */
530: insw(data_reg, buffer, wcount<<1);
531: }
532: }
533:
534: /*
535: * This is used for most PIO data transfers *to* the IDE interface
536: */
537: void ide_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount)
538: {
539: unsigned short io_base = HWIF(drive)->io_base;
540: unsigned short data_reg = io_base+IDE_DATA_OFFSET;
541: byte io_32bit = drive->io_32bit;
542:
543: if (io_32bit) {
544: #if SUPPORT_VLB_SYNC
545: if (io_32bit & 2) {
546: cli();
547: do_vlb_sync(io_base+IDE_NSECTOR_OFFSET);
548: outsl(data_reg, buffer, wcount);
549: if (drive->unmask)
550: sti();
551: } else
552: #endif /* SUPPORT_VLB_SYNC */
553: outsl(data_reg, buffer, wcount);
554: } else {
555: #if SUPPORT_SLOW_DATA_PORTS
556: if (drive->slow) {
557: unsigned short *ptr = (unsigned short *) buffer;
558: while (wcount--) {
559: outw_p(*ptr++, data_reg);
560: outw_p(*ptr++, data_reg);
561: }
562: } else
563: #endif /* SUPPORT_SLOW_DATA_PORTS */
564: outsw(data_reg, buffer, wcount<<1);
565: }
566: }
567:
568: /*
569: * The following routines are mainly used by the ATAPI drivers.
570: *
571: * These routines will round up any request for an odd number of bytes,
572: * so if an odd bytecount is specified, be sure that there's at least one
573: * extra byte allocated for the buffer.
574: */
575: void atapi_input_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount)
576: {
577: ++bytecount;
578: ide_input_data (drive, buffer, bytecount / 4);
579: if ((bytecount & 0x03) >= 2)
580: insw (IDE_DATA_REG, ((byte *)buffer) + (bytecount & ~0x03), 1);
581: }
582:
583: void atapi_output_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount)
584: {
585: ++bytecount;
586: ide_output_data (drive, buffer, bytecount / 4);
587: if ((bytecount & 0x03) >= 2)
588: outsw (IDE_DATA_REG, ((byte *)buffer) + (bytecount & ~0x03), 1);
589: }
590:
591: /*
592: * This should get invoked any time we exit the driver to
593: * wait for an interrupt response from a drive. handler() points
594: * at the appropriate code to handle the next interrupt, and a
595: * timer is started to prevent us from waiting forever in case
596: * something goes wrong (see the timer_expiry() handler later on).
597: */
598: void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout)
599: {
600: ide_hwgroup_t *hwgroup = HWGROUP(drive);
601: #ifdef DEBUG
602: if (hwgroup->handler != NULL) {
603: printk("%s: ide_set_handler: handler not null; old=%p, new=%p\n",
604: drive->name, hwgroup->handler, handler);
605: }
606: #endif
607: hwgroup->handler = handler;
608: hwgroup->timer.expires = jiffies + timeout;
609: add_timer(&(hwgroup->timer));
610: }
611:
612: /*
613: * lba_capacity_is_ok() performs a sanity check on the claimed "lba_capacity"
614: * value for this drive (from its reported identification information).
615: *
616: * Returns: 1 if lba_capacity looks sensible
617: * 0 otherwise
1.1.1.2 root 618: *
619: * Note: we must not change id->cyls here, otherwise a second call
620: * of this routine might no longer find lba_capacity ok.
1.1 root 621: */
622: static int lba_capacity_is_ok (struct hd_driveid *id)
623: {
624: unsigned long lba_sects = id->lba_capacity;
625: unsigned long chs_sects = id->cyls * id->heads * id->sectors;
626: unsigned long _10_percent = chs_sects / 10;
627:
1.1.1.2 root 628: /*
629: * The ATA spec tells large drives to return
630: * C/H/S = 16383/16/63 independent of their size.
631: * Some drives can be jumpered to use 15 heads instead of 16.
632: */
633: if (id->cyls == 16383 && id->sectors == 63 &&
634: (id->heads == 15 || id->heads == 16) &&
635: id->lba_capacity >= 16383*63*id->heads)
1.1 root 636: return 1; /* lba_capacity is our only option */
1.1.1.2 root 637:
1.1 root 638: /* perform a rough sanity check on lba_sects: within 10% is "okay" */
639: if ((lba_sects - chs_sects) < _10_percent)
640: return 1; /* lba_capacity is good */
641:
642: /* some drives have the word order reversed */
643: lba_sects = (lba_sects << 16) | (lba_sects >> 16);
644: if ((lba_sects - chs_sects) < _10_percent) {
645: id->lba_capacity = lba_sects; /* fix it */
646: return 1; /* lba_capacity is (now) good */
647: }
648: return 0; /* lba_capacity value is bad */
649: }
650:
651: /*
652: * current_capacity() returns the capacity (in sectors) of a drive
653: * according to its current geometry/LBA settings.
1.1.1.2 root 654: *
655: * It also sets select.b.lba.
1.1 root 656: */
657: static unsigned long current_capacity (ide_drive_t *drive)
658: {
659: struct hd_driveid *id = drive->id;
1.1.1.2 root 660: unsigned long capacity;
1.1 root 661:
662: if (!drive->present)
663: return 0;
664: #ifdef CONFIG_BLK_DEV_IDEFLOPPY
665: if (drive->media == ide_floppy)
666: return idefloppy_capacity(drive);
667: #endif /* CONFIG_BLK_DEV_IDEFLOPPY */
668: if (drive->media != ide_disk)
669: return 0x7fffffff; /* cdrom or tape */
1.1.1.2 root 670:
1.1 root 671: drive->select.b.lba = 0;
672: /* Determine capacity, and use LBA if the drive properly supports it */
1.1.1.2 root 673: capacity = drive->cyl * drive->head * drive->sect;
1.1 root 674: if (id != NULL && (id->capability & 2) && lba_capacity_is_ok(id)) {
675: if (id->lba_capacity >= capacity) {
676: capacity = id->lba_capacity;
677: drive->select.b.lba = 1;
678: }
679: }
680: return (capacity - drive->sect0);
681: }
682:
683: /*
684: * ide_geninit() is called exactly *once* for each major, from genhd.c,
685: * at the beginning of the initial partition check for the drives.
686: */
687: static void ide_geninit (struct gendisk *gd)
688: {
689: unsigned int unit;
690: ide_hwif_t *hwif = gd->real_devices;
691:
692: for (unit = 0; unit < gd->nr_real; ++unit) {
693: ide_drive_t *drive = &hwif->drives[unit];
694: #ifdef CONFIG_BLK_DEV_IDECD
695: if (drive->present && drive->media == ide_cdrom)
696: ide_cdrom_setup(drive);
697: #endif /* CONFIG_BLK_DEV_IDECD */
698: #ifdef CONFIG_BLK_DEV_IDETAPE
699: if (drive->present && drive->media == ide_tape)
700: idetape_setup(drive);
701: #endif /* CONFIG_BLK_DEV_IDETAPE */
702: #ifdef CONFIG_BLK_DEV_IDEFLOPPY
703: if (drive->present && drive->media == ide_floppy)
704: idefloppy_setup(drive);
705: #endif /* CONFIG_BLK_DEV_IDEFLOPPY */
706: drive->part[0].nr_sects = current_capacity(drive);
707: if (!drive->present || (drive->media != ide_disk && drive->media != ide_floppy) ||
708: !drive->part[0].nr_sects) {
709: drive->part[0].start_sect = -1; /* skip partition check */
710: }
711: }
712: }
713:
714: /*
715: * init_gendisk() (as opposed to ide_geninit) is called for each major device,
716: * after probing for drives, to allocate partition tables and other data
717: * structures needed for the routines in genhd.c. ide_geninit() gets called
718: * somewhat later, during the partition check.
719: */
720: static void init_gendisk (ide_hwif_t *hwif)
721: {
722: struct gendisk *gd, **gdp;
723: unsigned int unit, units, minors;
724: int *bs;
725:
726: /* figure out maximum drive number on the interface */
727: for (units = MAX_DRIVES; units > 0; --units) {
728: if (hwif->drives[units-1].present)
729: break;
730: }
731: minors = units * (1<<PARTN_BITS);
732: gd = kmalloc (sizeof(struct gendisk), GFP_KERNEL);
733: gd->sizes = kmalloc (minors * sizeof(int), GFP_KERNEL);
734: gd->part = kmalloc (minors * sizeof(struct hd_struct), GFP_KERNEL);
735: bs = kmalloc (minors*sizeof(int), GFP_KERNEL);
736:
737: memset(gd->part, 0, minors * sizeof(struct hd_struct));
738:
739: /* cdroms and msdos f/s are examples of non-1024 blocksizes */
740: blksize_size[hwif->major] = bs;
741: for (unit = 0; unit < minors; ++unit)
742: *bs++ = BLOCK_SIZE;
743:
744: for (unit = 0; unit < units; ++unit)
745: hwif->drives[unit].part = &gd->part[unit << PARTN_BITS];
746:
747: gd->major = hwif->major; /* our major device number */
748: gd->major_name = IDE_MAJOR_NAME; /* treated special in genhd.c */
749: gd->minor_shift = PARTN_BITS; /* num bits for partitions */
750: gd->max_p = 1<<PARTN_BITS; /* 1 + max partitions / drive */
751: gd->max_nr = units; /* max num real drives */
752: gd->nr_real = units; /* current num real drives */
753: gd->init = ide_geninit; /* initialization function */
754: gd->real_devices= hwif; /* ptr to internal data */
755: gd->next = NULL; /* linked list of major devs */
756:
757: for (gdp = &gendisk_head; *gdp; gdp = &((*gdp)->next)) ;
758: hwif->gd = *gdp = gd; /* link onto tail of list */
759: }
760:
761: static void do_reset1 (ide_drive_t *, int); /* needed below */
762:
763: #ifdef CONFIG_BLK_DEV_IDEATAPI
764: /*
765: * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
766: * during an atapi drive reset operation. If the drive has not yet responded,
767: * and we have not yet hit our maximum waiting time, then the timer is restarted
768: * for another 50ms.
769: */
770: static void atapi_reset_pollfunc (ide_drive_t *drive)
771: {
772: ide_hwgroup_t *hwgroup = HWGROUP(drive);
773: byte stat;
774:
775: OUT_BYTE (drive->select.all, IDE_SELECT_REG);
776: udelay (10);
777:
778: if (OK_STAT(stat=GET_STAT(), 0, BUSY_STAT)) {
779: printk("%s: ATAPI reset complete\n", drive->name);
780: } else {
781: if (jiffies < hwgroup->poll_timeout) {
782: ide_set_handler (drive, &atapi_reset_pollfunc, HZ/20);
783: return; /* continue polling */
784: }
785: hwgroup->poll_timeout = 0; /* end of polling */
786: printk("%s: ATAPI reset timed-out, status=0x%02x\n", drive->name, stat);
787: do_reset1 (drive, 1); /* do it the old fashioned way */
788: return;
789: }
790: hwgroup->poll_timeout = 0; /* done polling */
791: }
792: #endif /* CONFIG_BLK_DEV_IDEATAPI */
793:
794: /*
795: * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
796: * during an ide reset operation. If the drives have not yet responded,
797: * and we have not yet hit our maximum waiting time, then the timer is restarted
798: * for another 50ms.
799: */
800: static void reset_pollfunc (ide_drive_t *drive)
801: {
802: ide_hwgroup_t *hwgroup = HWGROUP(drive);
803: ide_hwif_t *hwif = HWIF(drive);
804: byte tmp;
805:
806: if (!OK_STAT(tmp=GET_STAT(), 0, BUSY_STAT)) {
807: if (jiffies < hwgroup->poll_timeout) {
808: ide_set_handler (drive, &reset_pollfunc, HZ/20);
809: return; /* continue polling */
810: }
811: printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
812: } else {
813: printk("%s: reset: ", hwif->name);
814: if ((tmp = GET_ERR()) == 1)
815: printk("success\n");
816: else {
817: #if FANCY_STATUS_DUMPS
818: printk("master: ");
819: switch (tmp & 0x7f) {
820: case 1: printk("passed");
821: break;
822: case 2: printk("formatter device error");
823: break;
824: case 3: printk("sector buffer error");
825: break;
826: case 4: printk("ECC circuitry error");
827: break;
828: case 5: printk("controlling MPU error");
829: break;
830: default:printk("error (0x%02x?)", tmp);
831: }
832: if (tmp & 0x80)
833: printk("; slave: failed");
834: printk("\n");
835: #else
836: printk("failed\n");
837: #endif /* FANCY_STATUS_DUMPS */
838: }
839: }
840: hwgroup->poll_timeout = 0; /* done polling */
841: }
842:
843: /*
844: * do_reset1() attempts to recover a confused drive by resetting it.
845: * Unfortunately, resetting a disk drive actually resets all devices on
846: * the same interface, so it can really be thought of as resetting the
847: * interface rather than resetting the drive.
848: *
849: * ATAPI devices have their own reset mechanism which allows them to be
850: * individually reset without clobbering other devices on the same interface.
851: *
852: * Unfortunately, the IDE interface does not generate an interrupt to let
853: * us know when the reset operation has finished, so we must poll for this.
854: * Equally poor, though, is the fact that this may a very long time to complete,
855: * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
856: * we set a timer to poll at 50ms intervals.
857: */
858: static void do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
859: {
860: unsigned int unit;
861: unsigned long flags;
862: ide_hwif_t *hwif = HWIF(drive);
863: ide_hwgroup_t *hwgroup = HWGROUP(drive);
864:
865: save_flags(flags);
866: cli(); /* Why ? */
867:
868: #ifdef CONFIG_BLK_DEV_IDEATAPI
869: /* For an ATAPI device, first try an ATAPI SRST. */
870: if (drive->media != ide_disk) {
871: if (!do_not_try_atapi) {
872: if (!drive->keep_settings) {
873: drive->unmask = 0;
874: drive->io_32bit = 0;
875: }
876: OUT_BYTE (drive->select.all, IDE_SELECT_REG);
877: udelay (20);
878: OUT_BYTE (WIN_SRST, IDE_COMMAND_REG);
879: hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
880: ide_set_handler (drive, &atapi_reset_pollfunc, HZ/20);
881: restore_flags (flags);
882: return;
883: }
884: }
885: #endif /* CONFIG_BLK_DEV_IDEATAPI */
886:
887: /*
888: * First, reset any device state data we were maintaining
889: * for any of the drives on this interface.
890: */
891: for (unit = 0; unit < MAX_DRIVES; ++unit) {
892: ide_drive_t *rdrive = &hwif->drives[unit];
893: #ifdef CONFIG_BLK_DEV_IDETAPE
894: if (rdrive->media == ide_tape)
895: rdrive->tape.reset_issued = 1;
896: #endif /* CONFIG_BLK_DEV_IDETAPE */
897: rdrive->special.all = 0;
898: rdrive->special.b.set_geometry = 1;
899: rdrive->special.b.recalibrate = 1;
900: if (OK_TO_RESET_CONTROLLER)
901: rdrive->mult_count = 0;
902: if (!rdrive->keep_settings) {
903: rdrive->mult_req = 0;
904: rdrive->unmask = 0;
905: rdrive->io_32bit = 0;
906: if (rdrive->using_dma) {
907: rdrive->using_dma = 0;
908: printk("%s: disabled DMA\n", rdrive->name);
909: }
910: }
911: if (rdrive->mult_req != rdrive->mult_count)
912: rdrive->special.b.set_multmode = 1;
913: }
914:
915: #if OK_TO_RESET_CONTROLLER
916: /*
917: * Note that we also set nIEN while resetting the device,
918: * to mask unwanted interrupts from the interface during the reset.
919: * However, due to the design of PC hardware, this will cause an
920: * immediate interrupt due to the edge transition it produces.
921: * This single interrupt gives us a "fast poll" for drives that
922: * recover from reset very quickly, saving us the first 50ms wait time.
923: */
924: OUT_BYTE(drive->ctl|6,IDE_CONTROL_REG); /* set SRST and nIEN */
925: udelay(10); /* more than enough time */
926: OUT_BYTE(drive->ctl|2,IDE_CONTROL_REG); /* clear SRST, leave nIEN */
927: udelay(10); /* more than enough time */
928: hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
929: ide_set_handler (drive, &reset_pollfunc, HZ/20);
930: #endif /* OK_TO_RESET_CONTROLLER */
931:
932: restore_flags (flags);
933: }
934:
935: /*
936: * ide_do_reset() is the entry point to the drive/interface reset code.
937: */
938: void ide_do_reset (ide_drive_t *drive)
939: {
940: do_reset1 (drive, 0);
941: #ifdef CONFIG_BLK_DEV_IDETAPE
942: if (drive->media == ide_tape)
943: drive->tape.reset_issued=1;
944: #endif /* CONFIG_BLK_DEV_IDETAPE */
945: }
946:
947: /*
948: * Clean up after success/failure of an explicit drive cmd
949: */
950: void ide_end_drive_cmd (ide_drive_t *drive, byte stat, byte err)
951: {
952: unsigned long flags;
953: struct request *rq = HWGROUP(drive)->rq;
954:
955: if (rq->cmd == IDE_DRIVE_CMD) {
956: byte *args = (byte *) rq->buffer;
957: rq->errors = !OK_STAT(stat,READY_STAT,BAD_STAT);
958: if (args) {
959: args[0] = stat;
960: args[1] = err;
961: args[2] = IN_BYTE(IDE_NSECTOR_REG);
962: }
963: }
964: save_flags(flags);
965: cli();
966: blk_dev[MAJOR(rq->rq_dev)].current_request = rq->next;
967: HWGROUP(drive)->rq = NULL;
968: rq->rq_status = RQ_INACTIVE;
969: if (rq->sem != NULL)
970: up(rq->sem);
971: restore_flags(flags);
972: }
973:
974: /*
975: * Error reporting, in human readable form (luxurious, but a memory hog).
976: */
977: byte ide_dump_status (ide_drive_t *drive, const char *msg, byte stat)
978: {
979: unsigned long flags;
980: byte err = 0;
981:
982: save_flags (flags);
983: sti();
984: printk("%s: %s: status=0x%02x", drive->name, msg, stat);
985: #if FANCY_STATUS_DUMPS
986: if (drive->media == ide_disk) {
987: printk(" { ");
988: if (stat & BUSY_STAT)
989: printk("Busy ");
990: else {
991: if (stat & READY_STAT) printk("DriveReady ");
992: if (stat & WRERR_STAT) printk("DeviceFault ");
993: if (stat & SEEK_STAT) printk("SeekComplete ");
994: if (stat & DRQ_STAT) printk("DataRequest ");
995: if (stat & ECC_STAT) printk("CorrectedError ");
996: if (stat & INDEX_STAT) printk("Index ");
997: if (stat & ERR_STAT) printk("Error ");
998: }
999: printk("}");
1000: }
1001: #endif /* FANCY_STATUS_DUMPS */
1002: printk("\n");
1003: if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
1004: err = GET_ERR();
1005: printk("%s: %s: error=0x%02x", drive->name, msg, err);
1006: #if FANCY_STATUS_DUMPS
1007: if (drive->media == ide_disk) {
1008: printk(" { ");
1009: if (err & ICRC_ERR) printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
1010: if (err & ECC_ERR) printk("UncorrectableError ");
1011: if (err & ID_ERR) printk("SectorIdNotFound ");
1012: if (err & ABRT_ERR) printk("DriveStatusError ");
1013: if (err & TRK0_ERR) printk("TrackZeroNotFound ");
1014: if (err & MARK_ERR) printk("AddrMarkNotFound ");
1015: printk("}");
1016: if (err & (BBD_ERR|ECC_ERR|ID_ERR|MARK_ERR)) {
1017: byte cur = IN_BYTE(IDE_SELECT_REG);
1018: if (cur & 0x40) { /* using LBA? */
1019: printk(", LBAsect=%ld", (unsigned long)
1020: ((cur&0xf)<<24)
1021: |(IN_BYTE(IDE_HCYL_REG)<<16)
1022: |(IN_BYTE(IDE_LCYL_REG)<<8)
1023: | IN_BYTE(IDE_SECTOR_REG));
1024: } else {
1025: printk(", CHS=%d/%d/%d",
1026: (IN_BYTE(IDE_HCYL_REG)<<8) +
1027: IN_BYTE(IDE_LCYL_REG),
1028: cur & 0xf,
1029: IN_BYTE(IDE_SECTOR_REG));
1030: }
1031: if (HWGROUP(drive)->rq)
1032: printk(", sector=%ld", HWGROUP(drive)->rq->sector);
1033: }
1034: }
1035: #endif /* FANCY_STATUS_DUMPS */
1036: printk("\n");
1037: }
1038: restore_flags (flags);
1039: return err;
1040: }
1041:
1042: /*
1043: * try_to_flush_leftover_data() is invoked in response to a drive
1044: * unexpectedly having its DRQ_STAT bit set. As an alternative to
1045: * resetting the drive, this routine tries to clear the condition
1046: * by read a sector's worth of data from the drive. Of course,
1047: * this may not help if the drive is *waiting* for data from *us*.
1048: */
1049: static void try_to_flush_leftover_data (ide_drive_t *drive)
1050: {
1051: int i = (drive->mult_count ? drive->mult_count : 1) * SECTOR_WORDS;
1052:
1053: while (i > 0) {
1054: unsigned long buffer[16];
1055: unsigned int wcount = (i > 16) ? 16 : i;
1056: i -= wcount;
1057: ide_input_data (drive, buffer, wcount);
1058: }
1059: }
1060:
1061: /*
1062: * ide_error() takes action based on the error returned by the controller.
1063: */
1064: void ide_error (ide_drive_t *drive, const char *msg, byte stat)
1065: {
1066: struct request *rq;
1067: byte err;
1068:
1069: err = ide_dump_status(drive, msg, stat);
1070: if ((rq = HWGROUP(drive)->rq) == NULL || drive == NULL)
1071: return;
1072: /* retry only "normal" I/O: */
1073: if (rq->cmd == IDE_DRIVE_CMD) {
1074: rq->errors = 1;
1075: ide_end_drive_cmd(drive, stat, err);
1076: return;
1077: }
1078: if (stat & BUSY_STAT) { /* other bits are useless when BUSY */
1079: rq->errors |= ERROR_RESET;
1080: } else {
1081: if (drive->media == ide_disk && (stat & ERR_STAT)) {
1082: /* err has different meaning on cdrom and tape */
1083: if (err == ABRT_ERR) {
1084: if (drive->select.b.lba && IN_BYTE(IDE_COMMAND_REG) == WIN_SPECIFY)
1085: return; /* some newer drives don't support WIN_SPECIFY */
1086: } else if ((err & (ABRT_ERR | ICRC_ERR)) == (ABRT_ERR | ICRC_ERR))
1087: ; /* UDMA crc error -- just retry the operation */
1088: else if (err & (BBD_ERR | ECC_ERR)) /* retries won't help these */
1089: rq->errors = ERROR_MAX;
1090: else if (err & TRK0_ERR) /* help it find track zero */
1091: rq->errors |= ERROR_RECAL;
1092: else if (err & MC_ERR)
1093: drive->special.b.mc = 1;
1094: }
1095: if ((stat & DRQ_STAT) && rq->cmd != WRITE)
1096: try_to_flush_leftover_data(drive);
1097: }
1098: if (GET_STAT() & (BUSY_STAT|DRQ_STAT))
1099: rq->errors |= ERROR_RESET; /* Mmmm.. timing problem */
1100:
1101: if (rq->errors >= ERROR_MAX) {
1102: #ifdef CONFIG_BLK_DEV_IDETAPE
1103: if (drive->media == ide_tape) {
1104: rq->errors = 0;
1105: idetape_end_request(0, HWGROUP(drive));
1106: } else
1107: #endif /* CONFIG_BLK_DEV_IDETAPE */
1108: #ifdef CONFIG_BLK_DEV_IDEFLOPPY
1109: if (drive->media == ide_floppy) {
1110: rq->errors = 0;
1111: idefloppy_end_request(0, HWGROUP(drive));
1112: } else
1113: #endif /* CONFIG_BLK_DEV_IDEFLOPPY */
1114: #ifdef CONFIG_BLK_DEV_IDESCSI
1115: if (drive->media == ide_scsi) {
1116: rq->errors = 0;
1117: idescsi_end_request(0, HWGROUP(drive));
1118: } else
1119: #endif /* CONFIG_BLK_DEV_IDESCSI */
1120: ide_end_request(0, HWGROUP(drive));
1121: }
1122: else {
1123: if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
1124: ++rq->errors;
1125: ide_do_reset(drive);
1126: return;
1127: } else if ((rq->errors & ERROR_RECAL) == ERROR_RECAL)
1128: drive->special.b.recalibrate = 1;
1129: ++rq->errors;
1130: }
1131: }
1132:
1133: /*
1134: * read_intr() is the handler for disk read/multread interrupts
1135: */
1136: static void read_intr (ide_drive_t *drive)
1137: {
1138: byte stat;
1139: int i;
1140: unsigned int msect, nsect;
1141: struct request *rq;
1142:
1143: if (!OK_STAT(stat=GET_STAT(),DATA_READY,BAD_R_STAT)) {
1144: ide_error(drive, "read_intr", stat);
1145: return;
1146: }
1147: msect = drive->mult_count;
1148: read_next:
1149: rq = HWGROUP(drive)->rq;
1150: if (msect) {
1151: if ((nsect = rq->current_nr_sectors) > msect)
1152: nsect = msect;
1153: msect -= nsect;
1154: } else
1155: nsect = 1;
1.1.1.2 root 1156: i = rq->nr_sectors - nsect;
1157: if (i > 0 && !msect)
1158: ide_set_handler (drive, &read_intr, WAIT_CMD);
1.1 root 1159: ide_input_data(drive, rq->buffer, nsect * SECTOR_WORDS);
1160: #ifdef DEBUG
1161: printk("%s: read: sectors(%ld-%ld), buffer=0x%08lx, remaining=%ld\n",
1162: drive->name, rq->sector, rq->sector+nsect-1,
1163: (unsigned long) rq->buffer+(nsect<<9), rq->nr_sectors-nsect);
1164: #endif
1165: rq->sector += nsect;
1166: rq->buffer += nsect<<9;
1167: rq->errors = 0;
1.1.1.2 root 1168: rq->nr_sectors = i;
1.1 root 1169: if ((rq->current_nr_sectors -= nsect) <= 0)
1170: ide_end_request(1, HWGROUP(drive));
1.1.1.2 root 1171: if (i > 0 && msect)
1172: goto read_next;
1.1 root 1173: }
1174:
1175: /*
1176: * write_intr() is the handler for disk write interrupts
1177: */
1178: static void write_intr (ide_drive_t *drive)
1179: {
1180: byte stat;
1181: int i;
1182: ide_hwgroup_t *hwgroup = HWGROUP(drive);
1183: struct request *rq = hwgroup->rq;
1184:
1185: if (OK_STAT(stat=GET_STAT(),DRIVE_READY,drive->bad_wstat)) {
1186: #ifdef DEBUG
1187: printk("%s: write: sector %ld, buffer=0x%08lx, remaining=%ld\n",
1188: drive->name, rq->sector, (unsigned long) rq->buffer,
1189: rq->nr_sectors-1);
1190: #endif
1191: if ((rq->nr_sectors == 1) ^ ((stat & DRQ_STAT) != 0)) {
1192: rq->sector++;
1193: rq->buffer += 512;
1194: rq->errors = 0;
1195: i = --rq->nr_sectors;
1196: --rq->current_nr_sectors;
1197: if (rq->current_nr_sectors <= 0)
1198: ide_end_request(1, hwgroup);
1199: if (i > 0) {
1200: ide_set_handler (drive, &write_intr, WAIT_CMD);
1.1.1.2 root 1201: ide_output_data (drive, rq->buffer, SECTOR_WORDS);
1.1 root 1202: }
1203: return;
1204: }
1205: }
1206: ide_error(drive, "write_intr", stat);
1207: }
1208:
1209: /*
1210: * ide_multwrite() transfers a block of up to mcount sectors of data
1211: * to a drive as part of a disk multiple-sector write operation.
1212: */
1213: void ide_multwrite (ide_drive_t *drive, unsigned int mcount)
1214: {
1215: struct request *rq = &HWGROUP(drive)->wrq;
1216:
1217: do {
1218: unsigned int nsect = rq->current_nr_sectors;
1219: if (nsect > mcount)
1220: nsect = mcount;
1221: mcount -= nsect;
1222:
1223: ide_output_data(drive, rq->buffer, nsect<<7);
1224: #ifdef DEBUG
1225: printk("%s: multwrite: sector %ld, buffer=0x%08lx, count=%d, remaining=%ld\n",
1226: drive->name, rq->sector, (unsigned long) rq->buffer,
1227: nsect, rq->nr_sectors - nsect);
1228: #endif
1229: if ((rq->nr_sectors -= nsect) <= 0)
1230: break;
1231: if ((rq->current_nr_sectors -= nsect) == 0) {
1232: if ((rq->bh = rq->bh->b_reqnext) != NULL) {
1233: rq->current_nr_sectors = rq->bh->b_size>>9;
1234: rq->buffer = rq->bh->b_data;
1235: } else {
1236: panic("%s: buffer list corrupted\n", drive->name);
1237: break;
1238: }
1239: } else {
1240: rq->buffer += nsect << 9;
1241: }
1242: } while (mcount);
1243: }
1244:
1245: /*
1246: * multwrite_intr() is the handler for disk multwrite interrupts
1247: */
1248: static void multwrite_intr (ide_drive_t *drive)
1249: {
1250: byte stat;
1251: int i;
1252: ide_hwgroup_t *hwgroup = HWGROUP(drive);
1253: struct request *rq = &hwgroup->wrq;
1254:
1255: if (OK_STAT(stat=GET_STAT(),DRIVE_READY,drive->bad_wstat)) {
1256: if (stat & DRQ_STAT) {
1257: if (rq->nr_sectors) {
1258: ide_set_handler (drive, &multwrite_intr, WAIT_CMD);
1.1.1.2 root 1259: ide_multwrite(drive, drive->mult_count);
1.1 root 1260: return;
1261: }
1262: } else {
1263: if (!rq->nr_sectors) { /* all done? */
1264: rq = hwgroup->rq;
1265: for (i = rq->nr_sectors; i > 0;){
1266: i -= rq->current_nr_sectors;
1267: ide_end_request(1, hwgroup);
1268: }
1269: return;
1270: }
1271: }
1272: }
1273: ide_error(drive, "multwrite_intr", stat);
1274: }
1275:
1276: /*
1277: * Issue a simple drive command
1278: * The drive must be selected beforehand.
1279: */
1280: static void ide_cmd(ide_drive_t *drive, byte cmd, byte nsect, ide_handler_t *handler)
1281: {
1282: ide_set_handler (drive, handler, WAIT_CMD);
1283: OUT_BYTE(drive->ctl,IDE_CONTROL_REG);
1284: OUT_BYTE(nsect,IDE_NSECTOR_REG);
1285: OUT_BYTE(cmd,IDE_COMMAND_REG);
1286: }
1287:
1288: /*
1289: * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
1290: */
1291: static void set_multmode_intr (ide_drive_t *drive)
1292: {
1293: byte stat = GET_STAT();
1294:
1295: sti();
1296: if (OK_STAT(stat,READY_STAT,BAD_STAT)) {
1297: drive->mult_count = drive->mult_req;
1298: } else {
1299: drive->mult_req = drive->mult_count = 0;
1300: drive->special.b.recalibrate = 1;
1301: (void) ide_dump_status(drive, "set_multmode", stat);
1302: }
1303: }
1304:
1305: /*
1306: * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
1307: */
1308: static void set_geometry_intr (ide_drive_t *drive)
1309: {
1310: byte stat = GET_STAT();
1311:
1312: sti();
1313: if (!OK_STAT(stat,READY_STAT,BAD_STAT))
1314: ide_error(drive, "set_geometry_intr", stat);
1315: }
1316:
1317: /*
1318: * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
1319: */
1320: static void recal_intr (ide_drive_t *drive)
1321: {
1322: byte stat = GET_STAT();
1323:
1324: sti();
1325: if (!OK_STAT(stat,READY_STAT,BAD_STAT))
1326: ide_error(drive, "recal_intr", stat);
1327: }
1328:
1329: /*
1330: * mc_intr() is invoked on completion of a WIN_ACKMC cmd.
1331: */
1332: static void mc_intr (ide_drive_t *drive)
1333: {
1334: byte stat = GET_STAT();
1335:
1336: sti();
1337: if (!OK_STAT(stat,READY_STAT,BAD_STAT))
1338: ide_error(drive, "mc_intr", stat);
1339: drive->special.b.mc = 0;
1340: }
1341:
1342: /*
1343: * drive_cmd_intr() is invoked on completion of a special DRIVE_CMD.
1344: */
1345: static void drive_cmd_intr (ide_drive_t *drive)
1346: {
1347: struct request *rq = HWGROUP(drive)->rq;
1348: byte *args = (byte *) rq->buffer;
1349: byte stat = GET_STAT();
1350:
1351: sti();
1352: if ((stat & DRQ_STAT) && args && args[3]) {
1353: byte io_32bit = drive->io_32bit;
1354: drive->io_32bit = 0;
1355: ide_input_data(drive, &args[4], args[3] * SECTOR_WORDS);
1356: drive->io_32bit = io_32bit;
1357: stat = GET_STAT();
1358: }
1359: if (OK_STAT(stat,READY_STAT,BAD_STAT))
1360: ide_end_drive_cmd (drive, stat, GET_ERR());
1361: else
1362: ide_error(drive, "drive_cmd", stat); /* calls ide_end_drive_cmd */
1363: }
1364:
1365: /*
1366: * do_special() is used to issue WIN_SPECIFY, WIN_RESTORE, and WIN_SETMULT
1367: * commands to a drive. It used to do much more, but has been scaled back.
1368: */
1369: static inline void do_special (ide_drive_t *drive)
1370: {
1371: special_t *s = &drive->special;
1372:
1373: #ifdef DEBUG
1374: printk("%s: do_special: 0x%02x\n", drive->name, s->all);
1375: #endif
1376: if (s->b.set_geometry) {
1377: s->b.set_geometry = 0;
1378: if (drive->media == ide_disk && !drive->no_geom) {
1379: OUT_BYTE(drive->sect,IDE_SECTOR_REG);
1380: OUT_BYTE(drive->cyl,IDE_LCYL_REG);
1381: OUT_BYTE(drive->cyl>>8,IDE_HCYL_REG);
1382: OUT_BYTE(((drive->head-1)|drive->select.all)&0xBF,IDE_SELECT_REG);
1383: if (!IS_PROMISE_DRIVE)
1384: ide_cmd(drive, WIN_SPECIFY, drive->sect, &set_geometry_intr);
1385: }
1386: } else if (s->b.recalibrate) {
1387: s->b.recalibrate = 0;
1388: if (drive->media == ide_disk && !IS_PROMISE_DRIVE)
1389: ide_cmd(drive, WIN_RESTORE, drive->sect, &recal_intr);
1390: } else if (s->b.set_tune) {
1391: ide_tuneproc_t *tuneproc = HWIF(drive)->tuneproc;
1392: s->b.set_tune = 0;
1393: if (tuneproc != NULL)
1394: tuneproc(drive, drive->tune_req);
1395: } else if (s->b.set_multmode) {
1396: s->b.set_multmode = 0;
1397: if (drive->media == ide_disk) {
1398: if (drive->id && drive->mult_req > drive->id->max_multsect)
1399: drive->mult_req = drive->id->max_multsect;
1400: if (!IS_PROMISE_DRIVE)
1401: ide_cmd(drive, WIN_SETMULT, drive->mult_req, &set_multmode_intr);
1402: } else
1403: drive->mult_req = 0;
1404: } else if (s->b.mc) {
1405: s->b.mc = 0;
1406: if (drive->media == ide_disk && !IS_PROMISE_DRIVE)
1407: ide_cmd(drive, WIN_ACKMC, drive->sect, &mc_intr);
1408: } else if (s->all) {
1409: int special = s->all;
1410: s->all = 0;
1411: printk("%s: bad special flag: 0x%02x\n", drive->name, special);
1412: }
1413: }
1414:
1415: /*
1416: * This routine busy-waits for the drive status to be not "busy".
1417: * It then checks the status for all of the "good" bits and none
1418: * of the "bad" bits, and if all is okay it returns 0. All other
1419: * cases return 1 after invoking ide_error() -- caller should just return.
1420: *
1421: * This routine should get fixed to not hog the cpu during extra long waits..
1422: * That could be done by busy-waiting for the first jiffy or two, and then
1423: * setting a timer to wake up at half second intervals thereafter,
1424: * until timeout is achieved, before timing out.
1425: */
1426: int ide_wait_stat (ide_drive_t *drive, byte good, byte bad, unsigned long timeout)
1427: {
1428: byte stat;
1429: unsigned long flags;
1430:
1431: udelay(1); /* spec allows drive 400ns to assert "BUSY" */
1432: if ((stat = GET_STAT()) & BUSY_STAT) {
1433: save_flags(flags);
1434: sti();
1435: timeout += jiffies;
1436: while ((stat = GET_STAT()) & BUSY_STAT) {
1437: if (jiffies > timeout) {
1438: restore_flags(flags);
1439: ide_error(drive, "status timeout", stat);
1440: return 1;
1441: }
1442: }
1443: restore_flags(flags);
1444: }
1445: udelay(1); /* allow status to settle, then read it again */
1446: if (OK_STAT((stat = GET_STAT()), good, bad))
1447: return 0;
1448: ide_error(drive, "status error", stat);
1449: return 1;
1450: }
1451:
1452: /*
1453: * do_rw_disk() issues READ and WRITE commands to a disk,
1454: * using LBA if supported, or CHS otherwise, to address sectors.
1455: * It also takes care of issuing special DRIVE_CMDs.
1456: */
1457: static inline void do_rw_disk (ide_drive_t *drive, struct request *rq, unsigned long block)
1458: {
1459: ide_hwif_t *hwif = HWIF(drive);
1460: unsigned short io_base = hwif->io_base;
1461: #ifdef CONFIG_BLK_DEV_PROMISE
1462: int use_promise_io = 0;
1463: #endif /* CONFIG_BLK_DEV_PROMISE */
1464:
1465: OUT_BYTE(drive->ctl,IDE_CONTROL_REG);
1466: OUT_BYTE(rq->nr_sectors,io_base+IDE_NSECTOR_OFFSET);
1467: #ifdef CONFIG_BLK_DEV_PROMISE
1468: if (IS_PROMISE_DRIVE) {
1469: if (hwif->is_promise2 || rq->cmd == READ) {
1470: use_promise_io = 1;
1471: }
1472: }
1473: if (drive->select.b.lba || use_promise_io) {
1474: #else /* !CONFIG_BLK_DEV_PROMISE */
1475: if (drive->select.b.lba) {
1476: #endif /* CONFIG_BLK_DEV_PROMISE */
1477: #ifdef DEBUG
1478: printk("%s: %sing: LBAsect=%ld, sectors=%ld, buffer=0x%08lx\n",
1479: drive->name, (rq->cmd==READ)?"read":"writ",
1480: block, rq->nr_sectors, (unsigned long) rq->buffer);
1481: #endif
1482: OUT_BYTE(block,io_base+IDE_SECTOR_OFFSET);
1483: OUT_BYTE(block>>=8,io_base+IDE_LCYL_OFFSET);
1484: OUT_BYTE(block>>=8,io_base+IDE_HCYL_OFFSET);
1485: OUT_BYTE(((block>>8)&0x0f)|drive->select.all,io_base+IDE_SELECT_OFFSET);
1486: } else {
1487: unsigned int sect,head,cyl,track;
1488: track = block / drive->sect;
1489: sect = block % drive->sect + 1;
1490: OUT_BYTE(sect,io_base+IDE_SECTOR_OFFSET);
1491: head = track % drive->head;
1492: cyl = track / drive->head;
1493: OUT_BYTE(cyl,io_base+IDE_LCYL_OFFSET);
1494: OUT_BYTE(cyl>>8,io_base+IDE_HCYL_OFFSET);
1495: OUT_BYTE(head|drive->select.all,io_base+IDE_SELECT_OFFSET);
1496: #ifdef DEBUG
1497: printk("%s: %sing: CHS=%d/%d/%d, sectors=%ld, buffer=0x%08lx\n",
1498: drive->name, (rq->cmd==READ)?"read":"writ", cyl,
1499: head, sect, rq->nr_sectors, (unsigned long) rq->buffer);
1500: #endif
1501: }
1502: #ifdef CONFIG_BLK_DEV_PROMISE
1503: if (use_promise_io) {
1504: do_promise_io (drive, rq);
1505: return;
1506: }
1507: #endif /* CONFIG_BLK_DEV_PROMISE */
1508: if (rq->cmd == READ) {
1509: #ifdef CONFIG_BLK_DEV_TRITON
1510: if (drive->using_dma && !(HWIF(drive)->dmaproc(ide_dma_read, drive)))
1511: return;
1512: #endif /* CONFIG_BLK_DEV_TRITON */
1513: ide_set_handler(drive, &read_intr, WAIT_CMD);
1514: OUT_BYTE(drive->mult_count ? WIN_MULTREAD : WIN_READ, io_base+IDE_COMMAND_OFFSET);
1515: return;
1516: }
1517: if (rq->cmd == WRITE) {
1518: #ifdef CONFIG_BLK_DEV_TRITON
1519: if (drive->using_dma && !(HWIF(drive)->dmaproc(ide_dma_write, drive)))
1520: return;
1521: #endif /* CONFIG_BLK_DEV_TRITON */
1.1.1.2 root 1522: if (drive->mult_count)
1523: ide_set_handler (drive, &multwrite_intr, WAIT_CMD);
1524: else
1525: ide_set_handler (drive, &write_intr, WAIT_CMD);
1.1 root 1526: OUT_BYTE(drive->mult_count ? WIN_MULTWRITE : WIN_WRITE, io_base+IDE_COMMAND_OFFSET);
1527: if (ide_wait_stat(drive, DATA_READY, drive->bad_wstat, WAIT_DRQ)) {
1528: printk("%s: no DRQ after issuing %s\n", drive->name,
1529: drive->mult_count ? "MULTWRITE" : "WRITE");
1530: return;
1531: }
1532: if (!drive->unmask)
1533: cli();
1534: if (drive->mult_count) {
1535: HWGROUP(drive)->wrq = *rq; /* scratchpad */
1536: ide_multwrite(drive, drive->mult_count);
1537: } else {
1538: ide_output_data(drive, rq->buffer, SECTOR_WORDS);
1539: }
1540: return;
1541: }
1542: printk("%s: bad command: %d\n", drive->name, rq->cmd);
1543: ide_end_request(0, HWGROUP(drive));
1544: }
1545:
1546: /*
1547: * execute_drive_cmd() issues a special drive command,
1548: * usually initiated by ioctl() from the external hdparm program.
1549: */
1550: static void execute_drive_cmd (ide_drive_t *drive, struct request *rq)
1551: {
1.1.1.2 root 1552: byte *args = (byte *)rq->buffer;
1.1 root 1553: if (args) {
1554: #ifdef DEBUG
1555: printk("%s: DRIVE_CMD cmd=0x%02x sc=0x%02x fr=0x%02x xx=0x%02x\n",
1556: drive->name, args[0], args[1], args[2], args[3]);
1557: #endif
1558: OUT_BYTE(args[2],IDE_FEATURE_REG);
1559: ide_cmd(drive, args[0], args[1], &drive_cmd_intr);
1560: return;
1561: } else {
1562: /*
1563: * NULL is actually a valid way of waiting for
1564: * all current requests to be flushed from the queue.
1565: */
1566: #ifdef DEBUG
1567: printk("%s: DRIVE_CMD (null)\n", drive->name);
1568: #endif
1569: ide_end_drive_cmd(drive, GET_STAT(), GET_ERR());
1570: return;
1571: }
1572: }
1573:
1574: /*
1575: * do_request() initiates handling of a new I/O request
1576: */
1577: static inline void do_request (ide_hwif_t *hwif, struct request *rq)
1578: {
1579: unsigned int minor, unit;
1580: unsigned long block, blockend;
1581: ide_drive_t *drive;
1582:
1583: sti();
1584: #ifdef DEBUG
1585: printk("%s: do_request: current=0x%08lx\n", hwif->name, (unsigned long) rq);
1586: #endif
1587: minor = MINOR(rq->rq_dev);
1588: unit = minor >> PARTN_BITS;
1589: if (MAJOR(rq->rq_dev) != hwif->major || unit >= MAX_DRIVES) {
1590: printk("%s: bad device number: %s\n",
1591: hwif->name, kdevname(rq->rq_dev));
1592: goto kill_rq;
1593: }
1594: drive = &hwif->drives[unit];
1595: #ifdef DEBUG
1596: if (rq->bh && !buffer_locked(rq->bh)) {
1597: printk("%s: block not locked\n", drive->name);
1598: goto kill_rq;
1599: }
1600: #endif
1601: block = rq->sector;
1602: blockend = block + rq->nr_sectors;
1603: if ((blockend < block) || (blockend > drive->part[minor&PARTN_MASK].nr_sects)) {
1.1.1.2 root 1604: #ifdef MACH
1605: printk ("%s%c: bad access: block=%ld, count=%ld, blockend=%ld, nr_sects%ld\n",
1606: drive->name, (minor&PARTN_MASK)?'0'+(minor&PARTN_MASK):' ',
1607: block, rq->nr_sectors, blockend, drive->part[minor&PARTN_MASK].nr_sects);
1608: #else
1.1 root 1609: printk("%s%c: bad access: block=%ld, count=%ld\n", drive->name,
1610: (minor&PARTN_MASK)?'0'+(minor&PARTN_MASK):' ', block, rq->nr_sectors);
1.1.1.2 root 1611: #endif
1.1 root 1612: goto kill_rq;
1613: }
1614: block += drive->part[minor&PARTN_MASK].start_sect + drive->sect0;
1615: #if FAKE_FDISK_FOR_EZDRIVE
1616: if (block == 0 && drive->remap_0_to_1)
1617: block = 1; /* redirect MBR access to EZ-Drive partn table */
1618: #endif /* FAKE_FDISK_FOR_EZDRIVE */
1619: ((ide_hwgroup_t *)hwif->hwgroup)->drive = drive;
1620: #if (DISK_RECOVERY_TIME > 0)
1621: while ((read_timer() - hwif->last_time) < DISK_RECOVERY_TIME);
1622: #endif
1623:
1624: #ifdef CONFIG_BLK_DEV_IDETAPE
1625: POLL_HWIF_TAPE_DRIVE; /* macro from ide-tape.h */
1626: #endif /* CONFIG_BLK_DEV_IDETAPE */
1627:
1628: SELECT_DRIVE(hwif,drive);
1629: if (ide_wait_stat(drive, drive->ready_stat, BUSY_STAT|DRQ_STAT, WAIT_READY)) {
1630: printk("%s: drive not ready for command\n", drive->name);
1631: return;
1632: }
1.1.1.2 root 1633:
1.1 root 1634: if (!drive->special.all) {
1635: if (rq->cmd == IDE_DRIVE_CMD) {
1636: execute_drive_cmd(drive, rq);
1637: return;
1638: }
1639: #ifdef CONFIG_BLK_DEV_IDEATAPI
1640: switch (drive->media) {
1641: case ide_disk:
1642: do_rw_disk (drive, rq, block);
1643: return;
1644: #ifdef CONFIG_BLK_DEV_IDECD
1645: case ide_cdrom:
1646: ide_do_rw_cdrom (drive, block);
1647: return;
1648: #endif /* CONFIG_BLK_DEV_IDECD */
1649: #ifdef CONFIG_BLK_DEV_IDETAPE
1650: case ide_tape:
1651: idetape_do_request (drive, rq, block);
1652: return;
1653: #endif /* CONFIG_BLK_DEV_IDETAPE */
1654: #ifdef CONFIG_BLK_DEV_IDEFLOPPY
1655: case ide_floppy:
1656: idefloppy_do_request (drive, rq, block);
1657: return;
1658: #endif /* CONFIG_BLK_DEV_IDEFLOPPY */
1659: #ifdef CONFIG_BLK_DEV_IDESCSI
1660: case ide_scsi:
1661: idescsi_do_request (drive, rq, block);
1662: return;
1663: #endif /* CONFIG_BLK_DEV_IDESCSI */
1664:
1665: default:
1666: printk("%s: media type %d not supported\n",
1667: drive->name, drive->media);
1668: goto kill_rq;
1669: }
1670: #else
1671: do_rw_disk (drive, rq, block); /* simpler and faster */
1672: return;
1.1.1.2 root 1673: #endif /* CONFIG_BLK_DEV_IDEATAPI */
1.1 root 1674: }
1675: do_special(drive);
1676: return;
1677: kill_rq:
1678: ide_end_request(0, hwif->hwgroup);
1679: }
1680:
1681: /*
1682: * The driver enables interrupts as much as possible. In order to do this,
1683: * (a) the device-interrupt is always masked before entry, and
1684: * (b) the timeout-interrupt is always disabled before entry.
1685: *
1686: * If we enter here from, say irq14, and then start a new request for irq15,
1687: * (possible with "serialize" option) then we cannot ensure that we exit
1688: * before the irq15 hits us. So, we must be careful not to let this bother us.
1689: *
1690: * Interrupts are still masked (by default) whenever we are exchanging
1691: * data/cmds with a drive, because some drives seem to have very poor
1692: * tolerance for latency during I/O. For devices which don't suffer from
1693: * this problem (most don't), the unmask flag can be set using the "hdparm"
1694: * utility, to permit other interrupts during data/cmd transfers.
1695: */
1696: void ide_do_request (ide_hwgroup_t *hwgroup)
1697: {
1698: cli(); /* paranoia */
1699: if (hwgroup->handler != NULL) {
1700: printk("%s: EEeekk!! handler not NULL in ide_do_request()\n", hwgroup->hwif->name);
1701: return;
1702: }
1703: do {
1704: ide_hwif_t *hwif = hwgroup->hwif;
1705: struct request *rq;
1706: if ((rq = hwgroup->rq) == NULL) {
1707: if (hwif->sharing_irq && hwgroup->drive) /* set nIEN */
1708: OUT_BYTE(hwgroup->drive->ctl|2,hwif->ctl_port);
1709: /*
1710: * hwgroup->next_hwif is different from hwgroup->hwif
1711: * only when a request is inserted using "ide_next".
1712: * This saves wear and tear on IDE tapes.
1713: */
1714: hwif = hwgroup->next_hwif;
1715: do {
1716: rq = blk_dev[hwif->major].current_request;
1717: if (rq != NULL && rq->rq_status != RQ_INACTIVE)
1718: goto got_rq;
1719: } while ((hwif = hwif->next) != hwgroup->next_hwif);
1720: hwgroup->active = 0;
1721: return; /* no work left for this hwgroup */
1722: }
1.1.1.2 root 1723: got_rq:
1.1 root 1724: do_request(hwgroup->hwif = hwgroup->next_hwif = hwif, hwgroup->rq = rq);
1725: cli();
1726: } while (hwgroup->handler == NULL);
1727: }
1728:
1729: /*
1730: * do_hwgroup_request() invokes ide_do_request() after first masking
1731: * all possible interrupts for the current hwgroup. This prevents race
1732: * conditions in the event that an unexpected interrupt occurs while
1733: * we are in the driver.
1734: *
1735: * Note that when an interrupt is used to reenter the driver, the first level
1736: * handler will already have masked the irq that triggered, but any other ones
1737: * for the hwgroup will still be unmasked. The driver tries to be careful
1738: * about such things.
1739: */
1740: static void do_hwgroup_request (ide_hwgroup_t *hwgroup)
1741: {
1742: if (hwgroup->handler == NULL) {
1743: ide_hwif_t *hgif = hwgroup->hwif;
1744: ide_hwif_t *hwif = hgif;
1745: hwgroup->active = 1;
1746: do {
1747: disable_irq(hwif->irq);
1748: } while ((hwif = hwif->next) != hgif);
1749: ide_do_request (hwgroup);
1750: do {
1751: enable_irq(hwif->irq);
1752: } while ((hwif = hwif->next) != hgif);
1753: }
1754: }
1755:
1756: static void do_ide0_request (void) /* invoked with cli() */
1757: {
1758: do_hwgroup_request (ide_hwifs[0].hwgroup);
1759: }
1760:
1761: #if MAX_HWIFS > 1
1762: static void do_ide1_request (void) /* invoked with cli() */
1763: {
1764: do_hwgroup_request (ide_hwifs[1].hwgroup);
1765: }
1766: #endif
1767:
1768: #if MAX_HWIFS > 2
1769: static void do_ide2_request (void) /* invoked with cli() */
1770: {
1771: do_hwgroup_request (ide_hwifs[2].hwgroup);
1772: }
1773: #endif
1774:
1775: #if MAX_HWIFS > 3
1776: static void do_ide3_request (void) /* invoked with cli() */
1777: {
1778: do_hwgroup_request (ide_hwifs[3].hwgroup);
1779: }
1780: #endif
1781:
1782: static void timer_expiry (unsigned long data)
1783: {
1784: ide_hwgroup_t *hwgroup = (ide_hwgroup_t *) data;
1785: ide_drive_t *drive = hwgroup->drive;
1786: unsigned long flags;
1787:
1788: save_flags(flags);
1789: cli();
1790:
1791: if (hwgroup->poll_timeout != 0) { /* polling in progress? */
1792: ide_handler_t *handler = hwgroup->handler;
1793: hwgroup->handler = NULL;
1794: handler(drive);
1795: } else if (hwgroup->handler == NULL) { /* not waiting for anything? */
1796: sti(); /* drive must have responded just as the timer expired */
1797: printk("%s: marginal timeout\n", drive->name);
1798: } else {
1799: hwgroup->handler = NULL; /* abort the operation */
1800: if (hwgroup->hwif->dmaproc)
1801: (void) hwgroup->hwif->dmaproc (ide_dma_abort, drive);
1802: ide_error(drive, "irq timeout", GET_STAT());
1803: }
1804: if (hwgroup->handler == NULL)
1805: do_hwgroup_request (hwgroup);
1806: restore_flags(flags);
1807: }
1808:
1809: /*
1810: * There's nothing really useful we can do with an unexpected interrupt,
1811: * other than reading the status register (to clear it), and logging it.
1812: * There should be no way that an irq can happen before we're ready for it,
1813: * so we needn't worry much about losing an "important" interrupt here.
1814: *
1815: * On laptops (and "green" PCs), an unexpected interrupt occurs whenever the
1816: * drive enters "idle", "standby", or "sleep" mode, so if the status looks
1817: * "good", we just ignore the interrupt completely.
1818: *
1819: * This routine assumes cli() is in effect when called.
1820: *
1821: * If an unexpected interrupt happens on irq15 while we are handling irq14
1822: * and if the two interfaces are "serialized" (CMD640), then it looks like
1823: * we could screw up by interfering with a new request being set up for irq15.
1824: *
1825: * In reality, this is a non-issue. The new command is not sent unless the
1826: * drive is ready to accept one, in which case we know the drive is not
1827: * trying to interrupt us. And ide_set_handler() is always invoked before
1828: * completing the issuance of any new drive command, so we will not be
1829: * accidently invoked as a result of any valid command completion interrupt.
1830: *
1831: */
1832: static void unexpected_intr (int irq, ide_hwgroup_t *hwgroup)
1833: {
1834: byte stat;
1835: unsigned int unit;
1836: ide_hwif_t *hwif = hwgroup->hwif;
1837:
1838: /*
1839: * handle the unexpected interrupt
1840: */
1841: do {
1842: if (hwif->irq == irq) {
1843: for (unit = 0; unit < MAX_DRIVES; ++unit) {
1844: ide_drive_t *drive = &hwif->drives[unit];
1845: if (!drive->present)
1846: continue;
1847: SELECT_DRIVE(hwif,drive);
1848: udelay(100); /* Ugly, but wait_stat() may not be safe here */
1849: if (!OK_STAT(stat=GET_STAT(), drive->ready_stat, BAD_STAT)) {
1850: /* Try to not flood the console with msgs */
1851: static unsigned long last_msgtime = 0;
1852: if ((last_msgtime + (HZ/2)) < jiffies) {
1853: last_msgtime = jiffies;
1854: (void) ide_dump_status(drive, "unexpected_intr", stat);
1855: }
1856: }
1857: if ((stat & DRQ_STAT))
1858: try_to_flush_leftover_data(drive);
1859: }
1860: }
1861: } while ((hwif = hwif->next) != hwgroup->hwif);
1862: SELECT_DRIVE(hwif,hwgroup->drive); /* Ugh.. probably interrupts current I/O */
1863: udelay(100); /* Ugly, but wait_stat() may not be safe here */
1864: }
1865:
1866: /*
1867: * entry point for all interrupts, caller does cli() for us
1868: */
1869: void ide_intr (int irq, void *dev_id, struct pt_regs *regs)
1870: {
1871: ide_hwgroup_t *hwgroup = dev_id;
1872: ide_handler_t *handler;
1873:
1874: if (irq == hwgroup->hwif->irq && (handler = hwgroup->handler) != NULL) {
1875: ide_drive_t *drive = hwgroup->drive;
1876: hwgroup->handler = NULL;
1877: del_timer(&(hwgroup->timer));
1878: if (drive->unmask)
1879: sti();
1880: handler(drive);
1881: cli(); /* this is necessary, as next rq may be different irq */
1882: if (hwgroup->handler == NULL) {
1883: SET_RECOVERY_TIMER(HWIF(drive));
1884: ide_do_request(hwgroup);
1885: }
1886: } else {
1887: unexpected_intr(irq, hwgroup);
1888: }
1889: cli();
1890: }
1891:
1892: /*
1893: * get_info_ptr() returns the (ide_drive_t *) for a given device number.
1894: * It returns NULL if the given device number does not match any present drives.
1895: */
1896: static ide_drive_t *get_info_ptr (kdev_t i_rdev)
1897: {
1898: int major = MAJOR(i_rdev);
1899: unsigned int h;
1900:
1901: for (h = 0; h < MAX_HWIFS; ++h) {
1902: ide_hwif_t *hwif = &ide_hwifs[h];
1903: if (hwif->present && major == hwif->major) {
1904: unsigned unit = DEVICE_NR(i_rdev);
1905: if (unit < MAX_DRIVES) {
1906: ide_drive_t *drive = &hwif->drives[unit];
1907: if (drive->present)
1908: return drive;
1909: } else if (major == IDE0_MAJOR && unit < 4) {
1910: printk("ide: probable bad entry for /dev/hd%c\n", 'a'+unit);
1911: printk("ide: to fix it, run: /usr/src/linux/scripts/MAKEDEV.ide\n");
1912: }
1913: break;
1914: }
1915: }
1916: return NULL;
1917: }
1918:
1919: /*
1920: * This function is intended to be used prior to invoking ide_do_drive_cmd().
1921: */
1922: void ide_init_drive_cmd (struct request *rq)
1923: {
1924: rq->buffer = NULL;
1925: rq->cmd = IDE_DRIVE_CMD;
1926: rq->sector = 0;
1927: rq->nr_sectors = 0;
1928: rq->current_nr_sectors = 0;
1929: rq->sem = NULL;
1930: rq->bh = NULL;
1931: rq->bhtail = NULL;
1932: rq->next = NULL;
1933:
1934: #if 0 /* these are done each time through ide_do_drive_cmd() */
1935: rq->errors = 0;
1936: rq->rq_status = RQ_ACTIVE;
1937: rq->rq_dev = ????;
1938: #endif
1.1.1.3 root 1939: rq->quiet = 0;
1.1 root 1940: }
1941:
1942: /*
1943: * This function issues a special IDE device request
1944: * onto the request queue.
1945: *
1946: * If action is ide_wait, then the rq is queued at the end of the
1947: * request queue, and the function sleeps until it has been processed.
1948: * This is for use when invoked from an ioctl handler.
1949: *
1950: * If action is ide_preempt, then the rq is queued at the head of
1951: * the request queue, displacing the currently-being-processed
1952: * request and this function returns immediately without waiting
1953: * for the new rq to be completed. This is VERY DANGEROUS, and is
1954: * intended for careful use by the ATAPI tape/cdrom driver code.
1955: *
1956: * If action is ide_next, then the rq is queued immediately after
1957: * the currently-being-processed-request (if any), and the function
1958: * returns without waiting for the new rq to be completed. As above,
1959: * This is VERY DANGEROUS, and is intended for careful use by the
1960: * ATAPI tape/cdrom driver code.
1961: *
1962: * If action is ide_end, then the rq is queued at the end of the
1963: * request queue, and the function returns immediately without waiting
1964: * for the new rq to be completed. This is again intended for careful
1965: * use by the ATAPI tape/cdrom driver code. (Currently used by ide-tape.c,
1966: * when operating in the pipelined operation mode).
1967: */
1968: int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t action)
1969: {
1970: unsigned long flags;
1971: unsigned int major = HWIF(drive)->major;
1972: struct request *cur_rq;
1973: struct blk_dev_struct *bdev = &blk_dev[major];
1974: struct semaphore sem = MUTEX_LOCKED;
1975:
1976: if (IS_PROMISE_DRIVE && rq->buffer != NULL)
1977: return -ENOSYS; /* special drive cmds not supported */
1978: rq->errors = 0;
1979: rq->rq_status = RQ_ACTIVE;
1980: rq->rq_dev = MKDEV(major,(drive->select.b.unit)<<PARTN_BITS);
1981: if (action == ide_wait)
1982: rq->sem = &sem;
1983: unplug_device(bdev);
1984:
1985: save_flags(flags);
1986: cli();
1987: if (action == ide_next)
1988: HWGROUP(drive)->next_hwif = HWIF(drive);
1989: cur_rq = bdev->current_request;
1990:
1991: if (cur_rq == NULL || action == ide_preempt) {
1992: rq->next = cur_rq;
1993: bdev->current_request = rq;
1994: if (action == ide_preempt)
1995: HWGROUP(drive)->rq = NULL;
1996: } else {
1997: if (action == ide_wait || action == ide_end) {
1998: while (cur_rq->next != NULL) /* find end of list */
1999: cur_rq = cur_rq->next;
2000: }
2001: rq->next = cur_rq->next;
2002: cur_rq->next = rq;
2003: }
2004: if (!HWGROUP(drive)->active) {
2005: do_hwgroup_request(HWGROUP(drive));
2006: cli();
2007: }
2008: if (action == ide_wait && rq->rq_status != RQ_INACTIVE)
2009: down(&sem); /* wait for it to be serviced */
2010: restore_flags(flags);
2011: return rq->errors ? -EIO : 0; /* return -EIO if errors */
2012: }
2013:
2014: static int ide_open(struct inode * inode, struct file * filp)
2015: {
2016: ide_drive_t *drive;
2017: unsigned long flags;
2018:
2019: if ((drive = get_info_ptr(inode->i_rdev)) == NULL)
2020: return -ENXIO;
2021: save_flags(flags);
2022: cli();
2023: while (drive->busy)
2024: sleep_on(&drive->wqueue);
2025: drive->usage++;
2026: restore_flags(flags);
2027: #ifdef CONFIG_BLK_DEV_IDECD
2028: if (drive->media == ide_cdrom)
2029: return ide_cdrom_open (inode, filp, drive);
2030: #endif /* CONFIG_BLK_DEV_IDECD */
2031: #ifdef CONFIG_BLK_DEV_IDETAPE
2032: if (drive->media == ide_tape)
2033: return idetape_blkdev_open (inode, filp, drive);
2034: #endif /* CONFIG_BLK_DEV_IDETAPE */
2035: #ifdef CONFIG_BLK_DEV_IDEFLOPPY
2036: if (drive->media == ide_floppy)
2037: return idefloppy_open (inode, filp, drive);
2038: #endif /* CONFIG_BLK_DEV_IDEFLOPPY */
2039: #ifdef CONFIG_BLK_DEV_IDESCSI
2040: if (drive->media == ide_scsi)
2041: return idescsi_open (inode, filp, drive);
2042: #endif /* CONFIG_BLK_DEV_IDESCSI */
2043: if (drive->removable && drive->usage == 1) {
2044: byte door_lock[] = {WIN_DOORLOCK,0,0,0};
2045: struct request rq;
2046: check_disk_change(inode->i_rdev);
2047: ide_init_drive_cmd (&rq);
1.1.1.2 root 2048: rq.buffer = (char *)door_lock;
1.1 root 2049: /*
2050: * Ignore the return code from door_lock,
2051: * since the open() has already succeeded,
2052: * and the door_lock is irrelevant at this point.
2053: */
2054: (void) ide_do_drive_cmd(drive, &rq, ide_wait);
2055: }
2056: return 0;
2057: }
2058:
2059: /*
2060: * Releasing a block device means we sync() it, so that it can safely
2061: * be forgotten about...
2062: */
2063: static void ide_release(struct inode * inode, struct file * file)
2064: {
2065: ide_drive_t *drive;
2066:
2067: if ((drive = get_info_ptr(inode->i_rdev)) != NULL) {
2068: fsync_dev(inode->i_rdev);
2069: drive->usage--;
2070: #ifdef CONFIG_BLK_DEV_IDECD
2071: if (drive->media == ide_cdrom) {
2072: ide_cdrom_release (inode, file, drive);
2073: return;
2074: }
2075: #endif /* CONFIG_BLK_DEV_IDECD */
2076: #ifdef CONFIG_BLK_DEV_IDETAPE
2077: if (drive->media == ide_tape) {
2078: idetape_blkdev_release (inode, file, drive);
2079: return;
2080: }
2081: #endif /* CONFIG_BLK_DEV_IDETAPE */
2082: #ifdef CONFIG_BLK_DEV_IDEFLOPPY
2083: if (drive->media == ide_floppy) {
2084: idefloppy_release (inode, file, drive);
2085: return;
2086: }
2087: #endif /* CONFIG_BLK_DEV_IDEFLOPPY */
2088: #ifdef CONFIG_BLK_DEV_IDESCSI
2089: if (drive->media == ide_scsi) {
2090: idescsi_ide_release (inode, file, drive);
2091: return;
2092: }
2093: #endif /* CONFIG_BLK_DEV_IDESCSI */
2094: if (drive->removable && !drive->usage) {
2095: byte door_unlock[] = {WIN_DOORUNLOCK,0,0,0};
2096: struct request rq;
2097: invalidate_buffers(inode->i_rdev);
2098: ide_init_drive_cmd (&rq);
1.1.1.2 root 2099: rq.buffer = (char *)door_unlock;
1.1 root 2100: (void) ide_do_drive_cmd(drive, &rq, ide_wait);
2101: }
2102: }
2103: }
2104:
2105: /*
2106: * This routine is called to flush all partitions and partition tables
2107: * for a changed disk, and then re-read the new partition table.
2108: * If we are revalidating a disk because of a media change, then we
2109: * enter with usage == 0. If we are using an ioctl, we automatically have
2110: * usage == 1 (we need an open channel to use an ioctl :-), so this
2111: * is our limit.
2112: */
2113: static int revalidate_disk(kdev_t i_rdev)
2114: {
2115: ide_drive_t *drive;
2116: unsigned int p, major, minor;
2117: long flags;
2118:
2119: if ((drive = get_info_ptr(i_rdev)) == NULL)
2120: return -ENODEV;
2121:
2122: major = MAJOR(i_rdev);
2123: minor = drive->select.b.unit << PARTN_BITS;
2124: save_flags(flags);
2125: cli();
2126: if (drive->busy || (drive->usage > 1)) {
2127: restore_flags(flags);
2128: return -EBUSY;
2129: };
2130: drive->busy = 1;
2131: restore_flags(flags);
2132:
2133: for (p = 0; p < (1<<PARTN_BITS); ++p) {
2134: if (drive->part[p].nr_sects > 0) {
2135: kdev_t devp = MKDEV(major, minor+p);
2136: fsync_dev (devp);
2137: invalidate_inodes (devp);
2138: invalidate_buffers (devp);
2139: set_blocksize(devp, 1024);
2140: }
2141: drive->part[p].start_sect = 0;
2142: drive->part[p].nr_sects = 0;
2143: };
2144:
2145: drive->part[0].nr_sects = current_capacity(drive);
2146: if ((drive->media != ide_disk && drive->media != ide_floppy) || !drive->part[0].nr_sects)
2147: drive->part[0].start_sect = -1;
2148: resetup_one_dev(HWIF(drive)->gd, drive->select.b.unit);
2149:
2150: drive->busy = 0;
2151: wake_up(&drive->wqueue);
2152: return 0;
2153: }
2154:
2155: static int write_fs_long (unsigned long useraddr, long value)
2156: {
2157: int err;
2158:
2159: if (NULL == (long *)useraddr)
2160: return -EINVAL;
2161: if ((err = verify_area(VERIFY_WRITE, (long *)useraddr, sizeof(long))))
2162: return err;
2163: put_user((unsigned)value, (long *) useraddr);
2164: return 0;
2165: }
2166:
2167: static int ide_ioctl (struct inode *inode, struct file *file,
2168: unsigned int cmd, unsigned long arg)
2169: {
2170: int err;
2171: ide_drive_t *drive;
2172: unsigned long flags;
2173: struct request rq;
2174:
2175: if (!inode || !(inode->i_rdev))
2176: return -EINVAL;
2177: if ((drive = get_info_ptr(inode->i_rdev)) == NULL)
2178: return -ENODEV;
2179: ide_init_drive_cmd (&rq);
2180: switch (cmd) {
2181: case HDIO_GETGEO:
2182: {
2183: struct hd_geometry *loc = (struct hd_geometry *) arg;
2184: if (!loc || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL;
1.1.1.2 root 2185: #ifdef MACH
2186: loc->heads = drive->bios_head;
2187: loc->sectors = drive->bios_sect;
2188: loc->cylinders = drive->bios_cyl;
2189: loc->start
2190: = (drive->part[MINOR(inode->i_rdev)&PARTN_MASK]
2191: .start_sect);
2192: #else
1.1 root 2193: err = verify_area(VERIFY_WRITE, loc, sizeof(*loc));
2194: if (err) return err;
2195: put_user(drive->bios_head, (byte *) &loc->heads);
2196: put_user(drive->bios_sect, (byte *) &loc->sectors);
2197: put_user(drive->bios_cyl, (unsigned short *) &loc->cylinders);
2198: put_user((unsigned)drive->part[MINOR(inode->i_rdev)&PARTN_MASK].start_sect,
2199: (unsigned long *) &loc->start);
1.1.1.2 root 2200: #endif
1.1 root 2201: return 0;
2202: }
2203: case BLKFLSBUF:
2204: if (!suser()) return -EACCES;
2205: fsync_dev(inode->i_rdev);
2206: invalidate_buffers(inode->i_rdev);
2207: return 0;
2208:
2209: case BLKRASET:
2210: if (!suser()) return -EACCES;
2211: if(arg > 0xff) return -EINVAL;
2212: read_ahead[MAJOR(inode->i_rdev)] = arg;
2213: return 0;
2214:
2215: case BLKRAGET:
2216: return write_fs_long(arg, read_ahead[MAJOR(inode->i_rdev)]);
2217:
2218: case BLKGETSIZE: /* Return device size */
2219: return write_fs_long(arg, drive->part[MINOR(inode->i_rdev)&PARTN_MASK].nr_sects);
2220: case BLKRRPART: /* Re-read partition tables */
2221: if (!suser()) return -EACCES;
2222: return revalidate_disk(inode->i_rdev);
2223:
2224: case HDIO_GET_KEEPSETTINGS:
2225: return write_fs_long(arg, drive->keep_settings);
2226:
2227: case HDIO_GET_UNMASKINTR:
2228: return write_fs_long(arg, drive->unmask);
2229:
2230: case HDIO_GET_DMA:
2231: return write_fs_long(arg, drive->using_dma);
2232:
2233: case HDIO_GET_32BIT:
2234: return write_fs_long(arg, drive->io_32bit);
2235:
2236: case HDIO_GET_MULTCOUNT:
2237: return write_fs_long(arg, drive->mult_count);
2238:
2239: case HDIO_GET_IDENTITY:
2240: if (!arg || (MINOR(inode->i_rdev) & PARTN_MASK))
2241: return -EINVAL;
2242: if (drive->id == NULL)
2243: return -ENOMSG;
2244: err = verify_area(VERIFY_WRITE, (char *)arg, sizeof(*drive->id));
2245: if (!err)
2246: memcpy_tofs((char *)arg, (char *)drive->id, sizeof(*drive->id));
2247: return err;
2248:
2249: case HDIO_GET_NOWERR:
2250: return write_fs_long(arg, drive->bad_wstat == BAD_R_STAT);
2251:
2252: case HDIO_SET_DMA:
2253: if (!suser()) return -EACCES;
2254: #ifdef CONFIG_BLK_DEV_IDECD
2255: if (drive->media == ide_cdrom)
2256: return -EPERM;
2257: #endif /* CONFIG_BLK_DEV_IDECD */
2258: if (!drive->id || !(drive->id->capability & 1) || !HWIF(drive)->dmaproc)
2259: return -EPERM;
2260: case HDIO_SET_KEEPSETTINGS:
2261: case HDIO_SET_UNMASKINTR:
2262: case HDIO_SET_NOWERR:
2263: if (arg > 1)
2264: return -EINVAL;
2265: case HDIO_SET_32BIT:
2266: if (!suser()) return -EACCES;
2267: if ((MINOR(inode->i_rdev) & PARTN_MASK))
2268: return -EINVAL;
2269: save_flags(flags);
2270: cli();
2271: switch (cmd) {
2272: case HDIO_SET_DMA:
2273: if (!(HWIF(drive)->dmaproc)) {
2274: restore_flags(flags);
2275: return -EPERM;
2276: }
2277: drive->using_dma = arg;
2278: break;
2279: case HDIO_SET_KEEPSETTINGS:
2280: drive->keep_settings = arg;
2281: break;
2282: case HDIO_SET_UNMASKINTR:
2283: if (arg && drive->no_unmask) {
2284: restore_flags(flags);
2285: return -EPERM;
2286: }
2287: drive->unmask = arg;
2288: break;
2289: case HDIO_SET_NOWERR:
2290: drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
2291: break;
2292: case HDIO_SET_32BIT:
2293: if (arg > (1 + (SUPPORT_VLB_SYNC<<1))) {
2294: restore_flags(flags);
2295: return -EINVAL;
2296: }
2297: if (arg && drive->no_io_32bit) {
2298: restore_flags(flags);
2299: return -EPERM;
2300: }
2301: drive->io_32bit = arg;
2302: #ifdef CONFIG_BLK_DEV_DTC2278
2303: if (HWIF(drive)->chipset == ide_dtc2278)
2304: HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
2305: #endif /* CONFIG_BLK_DEV_DTC2278 */
2306: break;
2307: }
2308: restore_flags(flags);
2309: return 0;
2310:
2311: case HDIO_SET_MULTCOUNT:
2312: if (!suser()) return -EACCES;
2313: if (MINOR(inode->i_rdev) & PARTN_MASK)
2314: return -EINVAL;
2315: if (drive->id && arg > drive->id->max_multsect)
2316: return -EINVAL;
2317: save_flags(flags);
2318: cli();
2319: if (drive->special.b.set_multmode) {
2320: restore_flags(flags);
2321: return -EBUSY;
2322: }
2323: drive->mult_req = arg;
2324: drive->special.b.set_multmode = 1;
2325: restore_flags(flags);
2326: (void) ide_do_drive_cmd (drive, &rq, ide_wait);
2327: return (drive->mult_count == arg) ? 0 : -EIO;
2328:
2329: case HDIO_DRIVE_CMD:
2330: {
2331: byte args[4], *argbuf = args;
2332: int argsize = 4;
2333: if (!suser() || securelevel > 0) return -EACCES;
2334: if (NULL == (void *) arg) {
2335: err = ide_do_drive_cmd(drive, &rq, ide_wait);
2336: } else if (!(err = verify_area(VERIFY_READ,(void *)arg, 4))) {
2337: memcpy_fromfs(args, (void *)arg, 4);
2338: if (args[3]) {
2339: argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
2340: argbuf = kmalloc(argsize, GFP_KERNEL);
2341: if (argbuf == NULL)
2342: return -ENOMEM;
2343: argbuf[0] = args[0];
2344: argbuf[1] = args[1];
2345: argbuf[2] = args[2];
2346: argbuf[3] = args[3];
2347: }
2348: if (!(err = verify_area(VERIFY_WRITE,(void *)arg, argsize))) {
1.1.1.2 root 2349: rq.buffer = (char *)argbuf;
1.1 root 2350: err = ide_do_drive_cmd(drive, &rq, ide_wait);
2351: memcpy_tofs((void *)arg, argbuf, argsize);
2352: }
2353: if (argsize > 4)
2354: kfree(argbuf);
2355: }
2356: return err;
2357: }
2358: case HDIO_SET_PIO_MODE:
2359: if (!suser()) return -EACCES;
2360: if (MINOR(inode->i_rdev) & PARTN_MASK)
2361: return -EINVAL;
2362: if (!HWIF(drive)->tuneproc)
2363: return -ENOSYS;
2364: save_flags(flags);
2365: cli();
2366: if (drive->special.b.set_tune) {
2367: restore_flags(flags);
2368: return -EBUSY;
2369: }
2370: drive->tune_req = (byte) arg;
2371: drive->special.b.set_tune = 1;
2372: restore_flags(flags);
2373: (void) ide_do_drive_cmd (drive, &rq, ide_wait);
2374: return 0;
2375:
2376: RO_IOCTLS(inode->i_rdev, arg);
2377:
2378: default:
2379: #ifdef CONFIG_BLK_DEV_IDECD
2380: if (drive->media == ide_cdrom)
2381: return ide_cdrom_ioctl(drive, inode, file, cmd, arg);
2382: #endif /* CONFIG_BLK_DEV_IDECD */
2383: #ifdef CONFIG_BLK_DEV_IDETAPE
2384: if (drive->media == ide_tape)
2385: return idetape_blkdev_ioctl(drive, inode, file, cmd, arg);
2386: #endif /* CONFIG_BLK_DEV_IDETAPE */
2387: #ifdef CONFIG_BLK_DEV_IDEFLOPPY
2388: if (drive->media == ide_floppy)
2389: return idefloppy_ioctl(drive, inode, file, cmd, arg);
2390: #endif /* CONFIG_BLK_DEV_IDEFLOPPY */
2391: #ifdef CONFIG_BLK_DEV_IDESCSI
2392: if (drive->media == ide_scsi)
2393: return idescsi_ioctl(drive, inode, file, cmd, arg);
2394: #endif /* CONFIG_BLK_DEV_IDESCSI */
2395: return -EPERM;
2396: }
2397: }
2398:
2399: static int ide_check_media_change (kdev_t i_rdev)
2400: {
2401: ide_drive_t *drive;
2402:
2403: if ((drive = get_info_ptr(i_rdev)) == NULL)
2404: return -ENODEV;
2405: #ifdef CONFIG_BLK_DEV_IDECD
2406: if (drive->media == ide_cdrom)
2407: return ide_cdrom_check_media_change (drive);
2408: #endif /* CONFIG_BLK_DEV_IDECD */
2409: #ifdef CONFIG_BLK_DEV_IDEFLOPPY
2410: if (drive->media == ide_floppy)
2411: return idefloppy_media_change (drive);
2412: #endif /* CONFIG_BLK_DEV_IDEFLOPPY */
2413: if (drive->removable) /* for disks */
2414: return 1; /* always assume it was changed */
2415: return 0;
2416: }
2417:
2418: void ide_fixstring (byte *s, const int bytecount, const int byteswap)
2419: {
2420: byte *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */
2421:
2422: if (byteswap) {
2423: /* convert from big-endian to host byte order */
2424: for (p = end ; p != s;) {
2425: unsigned short *pp = (unsigned short *) (p -= 2);
2426: *pp = ntohs(*pp);
2427: }
2428: }
2429:
2430: /* strip leading blanks */
2431: while (s != end && *s == ' ')
2432: ++s;
2433:
2434: /* compress internal blanks and strip trailing blanks */
2435: while (s != end && *s) {
2436: if (*s++ != ' ' || (s != end && *s && *s != ' '))
2437: *p++ = *(s-1);
2438: }
2439:
2440: /* wipe out trailing garbage */
2441: while (p != end)
2442: *p++ = '\0';
2443: }
2444:
2445: static inline void do_identify (ide_drive_t *drive, byte cmd)
2446: {
2447: int bswap;
2448: struct hd_driveid *id;
2449: unsigned long capacity, check;
2450:
2451: id = drive->id = kmalloc (SECTOR_WORDS*4, GFP_KERNEL);
2452: ide_input_data(drive, id, SECTOR_WORDS);/* read 512 bytes of id info */
2453: sti();
2454:
2455: #if defined (CONFIG_SCSI_EATA_DMA) || defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA)
2456: /*
1.1.1.2 root 2457: * EATA SCSI controllers do a hardware ATA emulation:
1.1 root 2458: * Ignore them if there is a driver for them available.
2459: */
2460: if ((id->model[0] == 'P' && id->model[1] == 'M')
2461: || (id->model[0] == 'S' && id->model[1] == 'K')) {
2462: printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model);
2463: drive->present = 0;
2464: return;
2465: }
2466: #endif
2467:
2468: /*
2469: * WIN_IDENTIFY returns little-endian info,
2470: * WIN_PIDENTIFY *usually* returns little-endian info.
2471: */
2472: bswap = 1;
2473: if (cmd == WIN_PIDENTIFY) {
2474: if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */
2475: || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */
2476: || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */
2477: bswap = 0; /* Vertos drives may still be weird */
2478: }
2479: ide_fixstring (id->model, sizeof(id->model), bswap);
2480: ide_fixstring (id->fw_rev, sizeof(id->fw_rev), bswap);
2481: ide_fixstring (id->serial_no, sizeof(id->serial_no), bswap);
2482:
1.1.1.2 root 2483: if (strstr((char *)id->model, "E X A B Y T E N E S T"))
1.1 root 2484: return;
2485:
2486: #ifdef CONFIG_BLK_DEV_IDEATAPI
2487: /*
2488: * Check for an ATAPI device
2489: */
2490: if (cmd == WIN_PIDENTIFY) {
2491: byte type = (id->config >> 8) & 0x1f;
2492: printk("%s: %s, ATAPI ", drive->name, id->model);
2493: #ifdef CONFIG_BLK_DEV_PROMISE
2494: if (HWIF(drive)->is_promise2) {
2495: printk(" -- not supported on 2nd Promise port\n");
2496: drive->present = 0;
2497: return;
2498: }
2499: #endif /* CONFIG_BLK_DEV_PROMISE */
2500: if (!drive->ide_scsi) switch (type) {
2501: case 0:
1.1.1.2 root 2502: if (!strstr((char *)id->model, "oppy") &&
2503: !strstr((char *)id->model, "poyp") &&
2504: !strstr((char *)id->model, "ZIP"))
1.1 root 2505: printk("cdrom or floppy?, assuming ");
1.1.1.2 root 2506: if (drive->media != ide_cdrom &&
2507: !strstr((char *)id->model, "CD-ROM")) {
1.1 root 2508: #ifdef CONFIG_BLK_DEV_IDEFLOPPY
2509: printk("FLOPPY drive\n");
2510: drive->media = ide_floppy;
2511: if (idefloppy_identify_device(drive, id))
2512: drive->present = 1;
2513: return;
2514: #else
2515: printk("FLOPPY ");
2516: break;
2517: #endif /* CONFIG_BLK_DEV_IDEFLOPPY */
2518: }
2519: /* Early cdrom models used zero */
2520: case 5:
2521: #ifdef CONFIG_BLK_DEV_IDECD
2522: printk ("CDROM drive\n");
2523: drive->media = ide_cdrom;
2524: drive->present = 1;
2525: drive->removable = 1;
2526: return;
2527: #else
2528: printk ("CDROM ");
2529: break;
2530: #endif /* CONFIG_BLK_DEV_IDECD */
2531: case 1:
2532: #ifdef CONFIG_BLK_DEV_IDETAPE
2533: printk ("TAPE drive");
2534: if (idetape_identify_device (drive,id)) {
2535: drive->media = ide_tape;
2536: drive->present = 1;
2537: drive->removable = 1;
1.1.1.3 root 2538: if (drive->autotune != 2 && HWIF(drive)->dmaproc != NULL && !drive->nodma) {
1.1 root 2539: if (!HWIF(drive)->dmaproc(ide_dma_check, drive))
2540: printk(", DMA");
2541: }
2542: printk("\n");
2543: }
2544: else {
2545: drive->present = 0;
2546: printk ("\nide-tape: the tape is not supported by this version of the driver\n");
2547: }
2548: return;
2549: #else
2550: printk ("TAPE ");
2551: break;
2552: #endif /* CONFIG_BLK_DEV_IDETAPE */
2553: default:
2554: drive->present = 0;
2555: printk("Type %d - Unknown device\n", type);
2556: return;
2557: }
2558: #ifdef CONFIG_BLK_DEV_IDESCSI
2559: printk("drive - enabling SCSI emulation\n");
2560: drive->media = ide_scsi;
2561: drive->present = 1;
2562: idescsi_setup(drive);
2563: #else
2564: drive->present = 0;
2565: printk("- not supported by this kernel\n");
2566: #endif /* CONFIG_BLK_DEV_IDESCSI */
2567: return;
2568: }
2569: #endif /* CONFIG_BLK_DEV_IDEATAPI */
2570:
2571: /* check for removable disks (eg. SYQUEST), ignore 'WD' drives */
2572: if (id->config & (1<<7)) { /* removable disk ? */
2573: if (id->model[0] != 'W' || id->model[1] != 'D')
2574: drive->removable = 1;
2575: }
2576:
2577: /* SunDisk drives: treat as non-removable, force one unit */
2578: if (id->model[0] == 'S' && id->model[1] == 'u') {
2579: drive->removable = 0;
2580: if (drive->select.all & (1<<4)) {
2581: drive->present = 0;
2582: return;
2583: }
2584: }
2585:
2586: drive->media = ide_disk;
2587: /* Extract geometry if we did not already have one for the drive */
2588: if (!drive->present) {
2589: drive->present = 1;
2590: drive->cyl = drive->bios_cyl = id->cyls;
2591: drive->head = drive->bios_head = id->heads;
2592: drive->sect = drive->bios_sect = id->sectors;
2593: }
2594: /* Handle logical geometry translation by the drive */
2595: if ((id->field_valid & 1) && id->cur_cyls && id->cur_heads
1.1.1.2 root 2596: && (id->cur_heads <= 16) && id->cur_sectors) {
1.1 root 2597: /*
2598: * Extract the physical drive geometry for our use.
2599: * Note that we purposely do *not* update the bios info.
2600: * This way, programs that use it (like fdisk) will
2601: * still have the same logical view as the BIOS does,
2602: * which keeps the partition table from being screwed.
2603: *
2604: * An exception to this is the cylinder count,
2605: * which we reexamine later on to correct for 1024 limitations.
2606: */
2607: drive->cyl = id->cur_cyls;
2608: drive->head = id->cur_heads;
2609: drive->sect = id->cur_sectors;
2610:
2611: /* check for word-swapped "capacity" field in id information */
2612: capacity = drive->cyl * drive->head * drive->sect;
2613: check = (id->cur_capacity0 << 16) | id->cur_capacity1;
2614: if (check == capacity) { /* was it swapped? */
2615: /* yes, bring it into little-endian order: */
2616: id->cur_capacity0 = (capacity >> 0) & 0xffff;
2617: id->cur_capacity1 = (capacity >> 16) & 0xffff;
2618: }
2619: }
2620: /* Use physical geometry if what we have still makes no sense */
1.1.1.2 root 2621: if ((!drive->head || drive->head > 16) &&
2622: id->heads && id->heads <= 16) {
1.1 root 2623: drive->cyl = id->cyls;
2624: drive->head = id->heads;
2625: drive->sect = id->sectors;
2626: }
2627:
2628: /* calculate drive capacity, and select LBA if possible */
1.1.1.2 root 2629: capacity = current_capacity (drive);
1.1 root 2630:
1.1.1.2 root 2631: /*
2632: * if possible, give fdisk access to more of the drive,
2633: * by correcting bios_cyls:
2634: */
2635: if (capacity > drive->bios_cyl * drive->bios_head * drive->bios_sect
2636: && !drive->forced_geom && drive->bios_sect && drive->bios_head) {
2637: int cyl = (capacity / drive->bios_sect) / drive->bios_head;
2638: if (cyl <= 65535)
2639: drive->bios_cyl = cyl;
2640: else {
2641: /* OK until 539 GB */
2642: drive->bios_sect = 63;
2643: drive->bios_head = 255;
2644: drive->bios_cyl = capacity / (63*255);
2645: }
1.1 root 2646: }
2647:
1.1.1.2 root 2648: if (!strncmp((char *)id->model, "BMI ", 4) &&
2649: strstr((char *)id->model, " ENHANCED IDE ") &&
1.1 root 2650: drive->select.b.lba)
2651: drive->no_geom = 1;
2652:
2653: printk ("%s: %.40s, %ldMB w/%dkB Cache, CHS=%d/%d/%d",
2654: drive->name, id->model, current_capacity(drive)/2048L, id->buf_size/2,
2655: drive->bios_cyl, drive->bios_head, drive->bios_sect);
2656:
2657: drive->mult_count = 0;
2658: if (id->max_multsect) {
2659: drive->mult_req = INITIAL_MULT_COUNT;
2660: if (drive->mult_req > id->max_multsect)
2661: drive->mult_req = id->max_multsect;
2662: if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect))
2663: drive->special.b.set_multmode = 1;
2664: }
1.1.1.3 root 2665: if (drive->autotune != 2 && HWIF(drive)->dmaproc != NULL && !drive->nodma) {
1.1 root 2666: if (!(HWIF(drive)->dmaproc(ide_dma_check, drive))) {
2667: if ((id->field_valid & 4) && (id->dma_ultra & (id->dma_ultra >> 8) & 7))
2668: printk(", UDMA");
2669: else
2670: printk(", DMA");
2671: }
2672: }
2673: printk("\n");
2674: }
2675:
2676: /*
2677: * Delay for *at least* 50ms. As we don't know how much time is left
2678: * until the next tick occurs, we wait an extra tick to be safe.
2679: * This is used only during the probing/polling for drives at boot time.
2680: */
2681: static void delay_50ms (void)
2682: {
2683: unsigned long timer = jiffies + ((HZ + 19)/20) + 1;
2684: while (timer > jiffies);
2685: }
2686:
2687: /*
2688: * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
2689: * and waits for a response. It also monitors irqs while this is
2690: * happening, in hope of automatically determining which one is
2691: * being used by the interface.
2692: *
2693: * Returns: 0 device was identified
2694: * 1 device timed-out (no response to identify request)
2695: * 2 device aborted the command (refused to identify itself)
2696: */
2697: static int try_to_identify (ide_drive_t *drive, byte cmd)
2698: {
2699: int hd_status, rc;
2700: unsigned long timeout;
2701: unsigned long irqs_on = 0;
2702: int irq_off;
2703:
2704: if (!HWIF(drive)->irq) { /* already got an IRQ? */
2705: probe_irq_off(probe_irq_on()); /* clear dangling irqs */
2706: irqs_on = probe_irq_on(); /* start monitoring irqs */
2707: OUT_BYTE(drive->ctl,IDE_CONTROL_REG); /* enable device irq */
2708: }
2709:
2710: delay_50ms(); /* take a deep breath */
2711: if ((IN_BYTE(IDE_ALTSTATUS_REG) ^ IN_BYTE(IDE_STATUS_REG)) & ~INDEX_STAT) {
2712: printk("%s: probing with STATUS instead of ALTSTATUS\n", drive->name);
2713: hd_status = IDE_STATUS_REG; /* ancient Seagate drives */
2714: } else
2715: hd_status = IDE_ALTSTATUS_REG; /* use non-intrusive polling */
2716:
2717: #if CONFIG_BLK_DEV_PROMISE
2718: if (IS_PROMISE_DRIVE) {
2719: if (promise_cmd(drive,PROMISE_IDENTIFY)) {
2720: if (irqs_on)
2721: (void) probe_irq_off(irqs_on);
2722: return 1;
2723: }
2724: } else
2725: #endif /* CONFIG_BLK_DEV_PROMISE */
2726: OUT_BYTE(cmd,IDE_COMMAND_REG); /* ask drive for ID */
2727: timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
2728: timeout += jiffies;
2729: do {
2730: if (jiffies > timeout) {
2731: if (irqs_on)
2732: (void) probe_irq_off(irqs_on);
2733: return 1; /* drive timed-out */
2734: }
2735: delay_50ms(); /* give drive a breather */
2736: } while (IN_BYTE(hd_status) & BUSY_STAT);
2737:
2738: delay_50ms(); /* wait for IRQ and DRQ_STAT */
2739: if (OK_STAT(GET_STAT(),DRQ_STAT,BAD_R_STAT)) {
2740: unsigned long flags;
2741: save_flags(flags);
2742: cli(); /* some systems need this */
2743: do_identify(drive, cmd); /* drive returned ID */
2744: rc = 0; /* drive responded with ID */
2745: (void) GET_STAT(); /* clear drive IRQ */
2746: restore_flags(flags);
2747: } else
2748: rc = 2; /* drive refused ID */
2749: if (!HWIF(drive)->irq) {
2750: irq_off = probe_irq_off(irqs_on); /* get our irq number */
2751: if (irq_off > 0) {
2752: HWIF(drive)->irq = irq_off; /* save it for later */
2753: irqs_on = probe_irq_on();
2754: OUT_BYTE(drive->ctl|2,IDE_CONTROL_REG); /* mask device irq */
2755: udelay(5);
2756: (void) probe_irq_off(irqs_on);
2757: (void) probe_irq_off(probe_irq_on()); /* clear self-inflicted irq */
2758: (void) GET_STAT(); /* clear drive IRQ */
2759:
2760: } else { /* Mmmm.. multiple IRQs.. don't know which was ours */
2761: printk("%s: IRQ probe failed (%d)\n", drive->name, irq_off);
2762: #ifdef CONFIG_BLK_DEV_CMD640
2763: #ifdef CMD640_DUMP_REGS
2764: if (HWIF(drive)->chipset == ide_cmd640) {
2765: printk("%s: Hmmm.. probably a driver problem.\n", drive->name);
2766: CMD640_DUMP_REGS;
2767: }
2768: #endif /* CMD640_DUMP_REGS */
2769: #endif /* CONFIG_BLK_DEV_CMD640 */
2770: }
2771: }
2772: return rc;
2773: }
2774:
2775: /*
2776: * do_probe() has the difficult job of finding a drive if it exists,
2777: * without getting hung up if it doesn't exist, without trampling on
2778: * ethernet cards, and without leaving any IRQs dangling to haunt us later.
2779: *
2780: * If a drive is "known" to exist (from CMOS or kernel parameters),
2781: * but does not respond right away, the probe will "hang in there"
2782: * for the maximum wait time (about 30 seconds), otherwise it will
2783: * exit much more quickly.
2784: *
2785: * Returns: 0 device was identified
2786: * 1 device timed-out (no response to identify request)
2787: * 2 device aborted the command (refused to identify itself)
2788: * 3 bad status from device (possible for ATAPI drives)
2789: * 4 probe was not attempted because failure was obvious
2790: */
2791: static int do_probe (ide_drive_t *drive, byte cmd)
2792: {
2793: int rc;
2794: ide_hwif_t *hwif = HWIF(drive);
2795: unsigned long timeout;
2796: #ifdef CONFIG_BLK_DEV_IDEATAPI
2797: if (drive->present) { /* avoid waiting for inappropriate probes */
2798: if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY))
2799: return 4;
2800: }
2801: #endif /* CONFIG_BLK_DEV_IDEATAPI */
2802: #ifdef DEBUG
2803: printk("probing for %s: present=%d, media=%d, probetype=%s\n",
2804: drive->name, drive->present, drive->media,
2805: (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI");
2806: #endif
2807: SELECT_DRIVE(hwif,drive);
2808: delay_50ms();
2809: if (IN_BYTE(IDE_SELECT_REG) != drive->select.all && !drive->present) {
2810: OUT_BYTE(0xa0,IDE_SELECT_REG); /* exit with drive0 selected */
2811: delay_50ms(); /* allow BUSY_STAT to assert & clear */
2812: return 3; /* no i/f present: avoid killing ethernet cards */
2813: }
2814:
2815: if (OK_STAT(GET_STAT(),READY_STAT,BUSY_STAT)
2816: || drive->present || cmd == WIN_PIDENTIFY)
2817: {
2818: if ((rc = try_to_identify(drive,cmd))) /* send cmd and wait */
2819: rc = try_to_identify(drive,cmd); /* failed: try again */
2820: if (rc == 1 && cmd == WIN_PIDENTIFY && drive->autotune != 2) {
2821: printk("%s: no response (status = 0x%02x), resetting drive\n", drive->name, GET_STAT());
2822: delay_50ms();
2823: OUT_BYTE (drive->select.all, IDE_SELECT_REG);
2824: delay_50ms();
2825: OUT_BYTE(WIN_SRST, IDE_COMMAND_REG);
2826: timeout = jiffies;
2827: while ((GET_STAT() & BUSY_STAT) && jiffies < timeout + WAIT_WORSTCASE)
2828: delay_50ms();
2829: rc = try_to_identify(drive, cmd);
2830: }
2831: if (rc == 1)
2832: printk("%s: no response (status = 0x%02x)\n", drive->name, GET_STAT());
2833: (void) GET_STAT(); /* ensure drive irq is clear */
2834: } else {
2835: rc = 3; /* not present or maybe ATAPI */
2836: }
2837: if (drive->select.b.unit != 0) {
2838: OUT_BYTE(0xa0,IDE_SELECT_REG); /* exit with drive0 selected */
2839: delay_50ms();
2840: (void) GET_STAT(); /* ensure drive irq is clear */
2841: }
2842: return rc;
2843: }
2844:
2845: static void enable_nest (ide_drive_t *drive)
2846: {
2847: unsigned long timeout;
2848:
2849: printk("%s: enabling %s -- ", HWIF(drive)->name, drive->id->model);
2850: SELECT_DRIVE(HWIF(drive), drive);
2851: delay_50ms();
2852: OUT_BYTE(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG);
2853: timeout = jiffies + WAIT_WORSTCASE;
2854: do {
2855: if (jiffies > timeout) {
2856: printk("failed (timeout)\n");
2857: return;
2858: }
2859: delay_50ms();
2860: } while (GET_STAT() & BUSY_STAT);
2861: delay_50ms();
2862: if (!OK_STAT(GET_STAT(), 0, BAD_STAT))
2863: printk("failed (status = 0x%02x)\n", GET_STAT());
2864: else
2865: printk("success\n");
2866: if (do_probe(drive, WIN_IDENTIFY) >= 2) { /* if !(success||timed-out) */
2867: #ifdef CONFIG_BLK_DEV_IDEATAPI
2868: (void) do_probe(drive, WIN_PIDENTIFY); /* look for ATAPI device */
2869: #endif /* CONFIG_BLK_DEV_IDEATAPI */
2870: }
2871: }
2872:
2873: /*
2874: * probe_for_drive() tests for existence of a given drive using do_probe().
2875: *
2876: * Returns: 0 no device was found
2877: * 1 device was found (note: drive->present might still be 0)
2878: */
2879: static inline byte probe_for_drive (ide_drive_t *drive)
2880: {
2881: if (drive->noprobe) /* skip probing? */
2882: return drive->present;
2883: if (do_probe(drive, WIN_IDENTIFY) >= 2) { /* if !(success||timed-out) */
2884: #ifdef CONFIG_BLK_DEV_IDEATAPI
2885: (void) do_probe(drive, WIN_PIDENTIFY); /* look for ATAPI device */
2886: #endif /* CONFIG_BLK_DEV_IDEATAPI */
2887: }
1.1.1.2 root 2888: if (drive->id && strstr((char *)drive->id->model, "E X A B Y T E N E S T"))
1.1 root 2889: enable_nest(drive);
2890: if (!drive->present)
2891: return 0; /* drive not found */
2892: if (drive->id == NULL) { /* identification failed? */
2893: if (drive->media == ide_disk) {
2894: printk ("%s: non-IDE drive, CHS=%d/%d/%d\n",
2895: drive->name, drive->cyl, drive->head, drive->sect);
2896: }
2897: #ifdef CONFIG_BLK_DEV_IDECD
2898: else if (drive->media == ide_cdrom) {
2899: printk("%s: ATAPI cdrom (?)\n", drive->name);
2900: }
2901: #endif /* CONFIG_BLK_DEV_IDECD */
2902: else {
2903: drive->present = 0; /* nuke it */
2904: }
2905: }
2906: return 1; /* drive was found */
2907: }
2908:
2909: /*
2910: * We query CMOS about hard disks : it could be that we have a SCSI/ESDI/etc
2911: * controller that is BIOS compatible with ST-506, and thus showing up in our
2912: * BIOS table, but not register compatible, and therefore not present in CMOS.
2913: *
2914: * Furthermore, we will assume that our ST-506 drives <if any> are the primary
2915: * drives in the system -- the ones reflected as drive 1 or 2. The first
2916: * drive is stored in the high nibble of CMOS byte 0x12, the second in the low
2917: * nibble. This will be either a 4 bit drive type or 0xf indicating use byte
2918: * 0x19 for an 8 bit type, drive 1, 0x1a for drive 2 in CMOS. A non-zero value
2919: * means we have an AT controller hard disk for that drive.
2920: *
2921: * Of course, there is no guarantee that either drive is actually on the
2922: * "primary" IDE interface, but we don't bother trying to sort that out here.
2923: * If a drive is not actually on the primary interface, then these parameters
2924: * will be ignored. This results in the user having to supply the logical
2925: * drive geometry as a boot parameter for each drive not on the primary i/f.
2926: *
2927: * The only "perfect" way to handle this would be to modify the setup.[cS] code
2928: * to do BIOS calls Int13h/Fn08h and Int13h/Fn48h to get all of the drive info
2929: * for us during initialization. I have the necessary docs -- any takers? -ml
2930: */
2931: static void probe_cmos_for_drives (ide_hwif_t *hwif)
2932: {
2933: #ifdef __i386__
2934: extern struct drive_info_struct drive_info;
2935: byte cmos_disks, *BIOS = (byte *) &drive_info;
2936: int unit;
2937:
2938: #ifdef CONFIG_BLK_DEV_PROMISE
2939: if (hwif->is_promise2)
2940: return;
2941: #endif /* CONFIG_BLK_DEV_PROMISE */
2942: outb_p(0x12,0x70); /* specify CMOS address 0x12 */
2943: cmos_disks = inb_p(0x71); /* read the data from 0x12 */
2944: /* Extract drive geometry from CMOS+BIOS if not already setup */
2945: for (unit = 0; unit < MAX_DRIVES; ++unit) {
2946: ide_drive_t *drive = &hwif->drives[unit];
2947: if ((cmos_disks & (0xf0 >> (unit*4))) && !drive->present && !drive->nobios) {
1.1.1.2 root 2948: unsigned short cyl = *(unsigned short *)BIOS;
2949: unsigned char head = *(BIOS+2);
2950: unsigned char sect = *(BIOS+14);
2951: unsigned char ctl = *(BIOS+8);
2952: if (cyl > 0 && head > 0 && sect > 0 && sect < 64) {
2953: drive->cyl = drive->bios_cyl = cyl;
2954: drive->head = drive->bios_head = head;
2955: drive->sect = drive->bios_sect = sect;
2956: drive->ctl = ctl;
2957: drive->present = 1;
2958: printk("hd%d: got CHS=%d/%d/%d CTL=%x from BIOS\n",
2959: unit, cyl, head, sect, ctl);
2960:
2961: } else {
2962: printk("hd%d: CHS=%d/%d/%d CTL=%x from BIOS ignored\n",
2963: unit, cyl, head, sect, ctl);
2964: }
1.1 root 2965: }
2966: BIOS += 16;
2967: }
2968: #endif
2969: }
2970:
2971: /*
2972: * This routine only knows how to look for drive units 0 and 1
2973: * on an interface, so any setting of MAX_DRIVES > 2 won't work here.
2974: */
2975: static void probe_hwif (ide_hwif_t *hwif)
2976: {
2977: unsigned int unit;
2978:
2979: if (hwif->noprobe)
2980: return;
2981: if (hwif->io_base == HD_DATA)
2982: probe_cmos_for_drives (hwif);
2983: #if CONFIG_BLK_DEV_PROMISE
2984: if (!hwif->is_promise2 &&
2985: (check_region(hwif->io_base,8) || check_region(hwif->ctl_port,1))) {
2986: #else
2987: if (check_region(hwif->io_base,8) || check_region(hwif->ctl_port,1)) {
2988: #endif /* CONFIG_BLK_DEV_PROMISE */
2989: int msgout = 0;
2990: for (unit = 0; unit < MAX_DRIVES; ++unit) {
2991: ide_drive_t *drive = &hwif->drives[unit];
2992: if (drive->present) {
2993: drive->present = 0;
2994: printk("%s: ERROR, PORTS ALREADY IN USE\n", drive->name);
2995: msgout = 1;
2996: }
2997: }
2998: if (!msgout)
2999: printk("%s: ports already in use, skipping probe\n", hwif->name);
3000: } else {
3001: unsigned long flags;
3002: save_flags(flags);
3003:
3004: sti(); /* needed for jiffies and irq probing */
3005: /*
3006: * Second drive should only exist if first drive was found,
3007: * but a lot of cdrom drives are configured as single slaves.
3008: */
3009: for (unit = 0; unit < MAX_DRIVES; ++unit) {
3010: ide_drive_t *drive = &hwif->drives[unit];
3011: (void) probe_for_drive (drive);
3012: if (drive->present && drive->media == ide_disk) {
3013: if ((!drive->head || drive->head > 16) && !drive->select.b.lba) {
3014: printk("%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n",
3015: drive->name, drive->head);
3016: drive->present = 0;
3017: }
3018: }
3019: if (drive->present && !hwif->present) {
3020: hwif->present = 1;
3021: request_region(hwif->io_base, 8, hwif->name);
3022: request_region(hwif->ctl_port, 1, hwif->name);
3023: }
3024: }
3025: restore_flags(flags);
3026: for (unit = 0; unit < MAX_DRIVES; ++unit) {
3027: ide_drive_t *drive = &hwif->drives[unit];
3028: if (drive->present && drive->media != ide_tape) {
3029: ide_tuneproc_t *tuneproc = HWIF(drive)->tuneproc;
3030: if (tuneproc != NULL && drive->autotune == 1)
3031: tuneproc(drive, 255); /* auto-tune PIO mode */
3032: }
3033: }
3034: }
3035: }
3036:
3037: /*
3038: * stridx() returns the offset of c within s,
3039: * or -1 if c is '\0' or not found within s.
3040: */
3041: static int stridx (const char *s, char c)
3042: {
3043: char *i = strchr(s, c);
3044: return (i && c) ? i - s : -1;
3045: }
3046:
3047: /*
3048: * match_parm() does parsing for ide_setup():
3049: *
3050: * 1. the first char of s must be '='.
3051: * 2. if the remainder matches one of the supplied keywords,
3052: * the index (1 based) of the keyword is negated and returned.
3053: * 3. if the remainder is a series of no more than max_vals numbers
3054: * separated by commas, the numbers are saved in vals[] and a
3055: * count of how many were saved is returned. Base10 is assumed,
3056: * and base16 is allowed when prefixed with "0x".
3057: * 4. otherwise, zero is returned.
3058: */
3059: static int match_parm (char *s, const char *keywords[], int vals[], int max_vals)
3060: {
3061: static const char *decimal = "0123456789";
3062: static const char *hex = "0123456789abcdef";
3063: int i, n;
3064:
3065: if (*s++ == '=') {
3066: /*
3067: * Try matching against the supplied keywords,
3068: * and return -(index+1) if we match one
3069: */
3070: if (keywords != NULL) {
3071: for (i = 0; *keywords != NULL; ++i) {
3072: if (!strcmp(s, *keywords++))
3073: return -(i+1);
3074: }
3075: }
3076: /*
3077: * Look for a series of no more than "max_vals"
3078: * numeric values separated by commas, in base10,
3079: * or base16 when prefixed with "0x".
3080: * Return a count of how many were found.
3081: */
3082: for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
3083: vals[n] = i;
3084: while ((i = stridx(decimal, *++s)) >= 0)
3085: vals[n] = (vals[n] * 10) + i;
3086: if (*s == 'x' && !vals[n]) {
3087: while ((i = stridx(hex, *++s)) >= 0)
3088: vals[n] = (vals[n] * 0x10) + i;
3089: }
3090: if (++n == max_vals)
3091: break;
3092: if (*s == ',')
3093: ++s;
3094: }
3095: if (!*s)
3096: return n;
3097: }
3098: return 0; /* zero = nothing matched */
3099: }
3100:
3101: /*
3102: * ide_setup() gets called VERY EARLY during initialization,
3103: * to handle kernel "command line" strings beginning with "hdx="
3104: * or "ide". Here is the complete set currently supported:
3105: *
3106: * "hdx=" is recognized for all "x" from "a" to "h", such as "hdc".
3107: * "idex=" is recognized for all "x" from "0" to "3", such as "ide1".
3108: *
3109: * "hdx=noprobe" : drive may be present, but do not probe for it
3110: * "hdx=none" : drive is NOT present, ignore cmos and do not probe
3111: * "hdx=nowerr" : ignore the WRERR_STAT bit on this drive
3112: * "hdx=cdrom" : drive is present, and is a cdrom drive
3113: * "hdx=cyl,head,sect" : disk drive is present, with specified geometry
3114: * "hdx=autotune" : driver will attempt to tune interface speed
3115: * to the fastest PIO mode supported,
3116: * if possible for this drive only.
3117: * Not fully supported by all chipset types,
3118: * and quite likely to cause trouble with
3119: * older/odd IDE drives.
1.1.1.3 root 3120: * "hdx=nodma" : disallow DMA for the drive
1.1 root 3121: *
3122: * "idebus=xx" : inform IDE driver of VESA/PCI bus speed in Mhz,
3123: * where "xx" is between 20 and 66 inclusive,
3124: * used when tuning chipset PIO modes.
3125: * For PCI bus, 25 is correct for a P75 system,
3126: * 30 is correct for P90,P120,P180 systems,
3127: * and 33 is used for P100,P133,P166 systems.
3128: * If in doubt, use idebus=33 for PCI.
3129: * As for VLB, it is safest to not specify it.
3130: *
3131: * "idex=noprobe" : do not attempt to access/use this interface
3132: * "idex=base" : probe for an interface at the addr specified,
3133: * where "base" is usually 0x1f0 or 0x170
3134: * and "ctl" is assumed to be "base"+0x206
3135: * "idex=base,ctl" : specify both base and ctl
3136: * "idex=base,ctl,irq" : specify base, ctl, and irq number
3137: * "idex=autotune" : driver will attempt to tune interface speed
3138: * to the fastest PIO mode supported,
3139: * for all drives on this interface.
3140: * Not fully supported by all chipset types,
3141: * and quite likely to cause trouble with
3142: * older/odd IDE drives.
3143: * "idex=noautotune" : driver will NOT attempt to tune interface speed
3144: * This is the default for most chipsets,
3145: * except the cmd640.
3146: * "idex=serialize" : do not overlap operations on idex and ide(x^1)
3147: *
3148: * The following are valid ONLY on ide0,
3149: * and the defaults for the base,ctl ports must not be altered.
3150: *
3151: * "ide0=dtc2278" : probe/support DTC2278 interface
3152: * "ide0=ht6560b" : probe/support HT6560B interface
3153: * "ide0=cmd640_vlb" : *REQUIRED* for VLB cards with the CMD640 chip
3154: * (not for PCI -- automatically detected)
3155: * "ide0=qd6580" : probe/support qd6580 interface
3156: * "ide0=ali14xx" : probe/support ali14xx chipsets (ALI M1439, M1443, M1445)
3157: * "ide0=umc8672" : probe/support umc8672 chipsets
3158: */
3159: void ide_setup (char *s)
3160: {
3161: int i, vals[3];
3162: ide_hwif_t *hwif;
3163: ide_drive_t *drive;
3164: unsigned int hw, unit;
1.1.1.3 root 3165: #ifdef MACH
3166: const char max_drive = '0' + ((MAX_HWIFS * MAX_DRIVES) - 1);
3167: #else
1.1 root 3168: const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1.1.1.3 root 3169: #endif
1.1 root 3170: const char max_hwif = '0' + (MAX_HWIFS - 1);
3171:
3172: printk("ide_setup: %s", s);
3173: init_ide_data ();
3174:
3175: /*
3176: * Look for drive options: "hdx="
3177: */
1.1.1.3 root 3178: #ifdef MACH
3179: if (s[0] == 'h' && s[1] == 'd' && s[2] >= '0' && s[2] <= max_drive) {
3180: #else
1.1 root 3181: if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1.1.1.3 root 3182: #endif
1.1 root 3183: const char *hd_words[] = {"none", "noprobe", "nowerr", "cdrom",
3184: "serialize", "autotune", "noautotune",
1.1.1.3 root 3185: "slow", "ide-scsi", "nodma", NULL};
3186: #ifdef MACH
3187: unit = s[2] - '0';
3188: #else
1.1 root 3189: unit = s[2] - 'a';
1.1.1.3 root 3190: #endif
1.1 root 3191: hw = unit / MAX_DRIVES;
3192: unit = unit % MAX_DRIVES;
3193: hwif = &ide_hwifs[hw];
3194: drive = &hwif->drives[unit];
3195: switch (match_parm(&s[3], hd_words, vals, 3)) {
3196: case -1: /* "none" */
3197: drive->nobios = 1; /* drop into "noprobe" */
3198: case -2: /* "noprobe" */
3199: drive->noprobe = 1;
3200: goto done;
3201: case -3: /* "nowerr" */
3202: drive->bad_wstat = BAD_R_STAT;
3203: hwif->noprobe = 0;
3204: goto done;
3205: case -4: /* "cdrom" */
3206: drive->present = 1;
3207: drive->media = ide_cdrom;
3208: hwif->noprobe = 0;
3209: goto done;
3210: case -5: /* "serialize" */
3211: printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
3212: goto do_serialize;
3213: case -6: /* "autotune" */
3214: drive->autotune = 1;
3215: goto done;
3216: case -7: /* "noautotune" */
3217: drive->autotune = 2;
3218: goto done;
3219: case -8: /* "slow" */
3220: drive->slow = 1;
3221: goto done;
3222: case -9: /* "ide-scsi" */
3223: drive->ide_scsi = 1;
3224: goto done;
1.1.1.3 root 3225: case -10: /* "nodma" */
3226: drive->nodma = 1;
3227: goto done;
1.1 root 3228: case 3: /* cyl,head,sect */
3229: drive->media = ide_disk;
3230: drive->cyl = drive->bios_cyl = vals[0];
3231: drive->head = drive->bios_head = vals[1];
3232: drive->sect = drive->bios_sect = vals[2];
3233: drive->present = 1;
3234: drive->forced_geom = 1;
3235: hwif->noprobe = 0;
3236: goto done;
3237: default:
3238: goto bad_option;
3239: }
3240: }
3241:
3242: if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
3243: goto bad_option;
3244: /*
3245: * Look for bus speed option: "idebus="
3246: */
3247: if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
3248: if (match_parm(&s[6], NULL, vals, 1) != 1)
3249: goto bad_option;
3250: if (vals[0] >= 20 && vals[0] <= 66)
3251: idebus_parameter = vals[0];
3252: else
3253: printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
3254: goto done;
3255: }
3256: /*
3257: * Look for interface options: "idex="
3258: */
3259: if (s[3] >= '0' && s[3] <= max_hwif) {
3260: /*
3261: * Be VERY CAREFUL changing this: note hardcoded indexes below
3262: */
3263: const char *ide_words[] = {"noprobe", "serialize", "autotune", "noautotune",
3264: "qd6580", "ht6560b", "cmd640_vlb", "dtc2278", "umc8672", "ali14xx", "dc4030", NULL};
3265: hw = s[3] - '0';
3266: hwif = &ide_hwifs[hw];
3267: i = match_parm(&s[4], ide_words, vals, 3);
3268:
3269: /*
3270: * Cryptic check to ensure chipset not already set for hwif:
3271: */
3272: if (i > 0 || i <= -5) {
3273: if (hwif->chipset != ide_unknown)
3274: goto bad_option;
3275: if (i <= -5) {
3276: if (ide_hwifs[1].chipset != ide_unknown)
3277: goto bad_option;
3278: /*
3279: * Interface keywords work only for ide0:
3280: */
3281: if (hw != 0)
3282: goto bad_hwif;
3283: }
3284: }
3285:
3286: switch (i) {
3287: #ifdef CONFIG_BLK_DEV_PROMISE
3288: case -11: /* "dc4030" */
3289: {
3290: setup_dc4030(hwif);
3291: goto done;
3292: }
3293: #endif /* CONFIG_BLK_DEV_PROMISE */
3294: #ifdef CONFIG_BLK_DEV_ALI14XX
3295: case -10: /* "ali14xx" */
3296: {
3297: extern void init_ali14xx (void);
3298: init_ali14xx();
3299: goto done;
3300: }
3301: #endif /* CONFIG_BLK_DEV_ALI14XX */
3302: #ifdef CONFIG_BLK_DEV_UMC8672
3303: case -9: /* "umc8672" */
3304: {
3305: extern void init_umc8672 (void);
3306: init_umc8672();
3307: goto done;
3308: }
3309: #endif /* CONFIG_BLK_DEV_UMC8672 */
3310: #ifdef CONFIG_BLK_DEV_DTC2278
3311: case -8: /* "dtc2278" */
3312: {
3313: extern void init_dtc2278 (void);
3314: init_dtc2278();
3315: goto done;
3316: }
3317: #endif /* CONFIG_BLK_DEV_DTC2278 */
3318: #ifdef CONFIG_BLK_DEV_CMD640
3319: case -7: /* "cmd640_vlb" */
3320: {
3321: extern int cmd640_vlb; /* flag for cmd640.c */
3322: cmd640_vlb = 1;
3323: goto done;
3324: }
3325: #endif /* CONFIG_BLK_DEV_CMD640 */
3326: #ifdef CONFIG_BLK_DEV_HT6560B
3327: case -6: /* "ht6560b" */
3328: {
3329: extern void init_ht6560b (void);
3330: init_ht6560b();
3331: goto done;
3332: }
3333: #endif /* CONFIG_BLK_DEV_HT6560B */
3334: #if CONFIG_BLK_DEV_QD6580
3335: case -5: /* "qd6580" (has secondary i/f) */
3336: {
3337: extern void init_qd6580 (void);
3338: init_qd6580();
3339: goto done;
3340: }
3341: #endif /* CONFIG_BLK_DEV_QD6580 */
3342: case -4: /* "noautotune" */
3343: hwif->drives[0].autotune = 2;
3344: hwif->drives[1].autotune = 2;
3345: goto done;
3346: case -3: /* "autotune" */
3347: hwif->drives[0].autotune = 1;
3348: hwif->drives[1].autotune = 1;
3349: goto done;
3350: case -2: /* "serialize" */
3351: do_serialize:
3352: ide_hwifs[hw].serialized = 1; /* serialize */
3353: ide_hwifs[hw^1].serialized = 1; /* with mate */
3354: goto done;
3355:
3356: case -1: /* "noprobe" */
3357: hwif->noprobe = 1;
3358: goto done;
3359:
3360: case 1: /* base */
3361: vals[1] = vals[0] + 0x206; /* default ctl */
3362: case 2: /* base,ctl */
3363: vals[2] = 0; /* default irq = probe for it */
3364: case 3: /* base,ctl,irq */
3365: hwif->io_base = vals[0];
3366: hwif->ctl_port = vals[1];
3367: hwif->irq = vals[2];
3368: hwif->noprobe = 0;
3369: hwif->chipset = ide_generic;
3370: goto done;
3371:
3372: case 0: goto bad_option;
3373: default:
3374: printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
3375: return;
3376: }
3377: }
3378: bad_option:
3379: printk(" -- BAD OPTION\n");
3380: return;
3381: bad_hwif:
3382: printk("-- NOT SUPPORTED ON ide%d", hw);
3383: done:
3384: printk("\n");
3385: }
3386:
3387: /*
3388: * This routine is called from the partition-table code in genhd.c
3389: * to "convert" a drive to a logical geometry with fewer than 1024 cyls.
3390: *
3391: * The second parameter, "xparm", determines exactly how the translation
3392: * will be handled:
3393: * 0 = convert to CHS with fewer than 1024 cyls
3394: * using the same method as Ontrack DiskManager.
3395: * 1 = same as "0", plus offset everything by 63 sectors.
3396: * -1 = similar to "0", plus redirect sector 0 to sector 1.
3397: * >1 = convert to a CHS geometry with "xparm" heads.
3398: *
3399: * Returns 0 if the translation was not possible, if the device was not
3400: * an IDE disk drive, or if a geometry was "forced" on the commandline.
3401: * Returns 1 if the geometry translation was successful.
3402: */
1.1.1.2 root 3403:
1.1 root 3404: int ide_xlate_1024 (kdev_t i_rdev, int xparm, const char *msg)
3405: {
3406: ide_drive_t *drive;
3407: static const byte head_vals[] = {4, 8, 16, 32, 64, 128, 255, 0};
3408: const byte *heads = head_vals;
3409: unsigned long tracks;
3410:
1.1.1.2 root 3411: drive = get_info_ptr(i_rdev);
3412: if (!drive)
3413: return 0;
3414:
3415: if (drive->forced_geom)
1.1 root 3416: return 0;
3417:
3418: if (xparm > 1 && xparm <= drive->bios_head && drive->bios_sect == 63)
3419: return 0; /* we already have a translation */
3420:
3421: printk("%s ", msg);
3422:
1.1.1.2 root 3423: if (xparm < 0 && (drive->bios_cyl * drive->bios_head * drive->bios_sect) < (1024 * 16 * 63)) {
3424: return 0; /* small disk: no translation needed */
3425: }
3426:
1.1 root 3427: if (drive->id) {
3428: drive->cyl = drive->id->cyls;
3429: drive->head = drive->id->heads;
3430: drive->sect = drive->id->sectors;
3431: }
3432: drive->bios_cyl = drive->cyl;
3433: drive->bios_head = drive->head;
3434: drive->bios_sect = drive->sect;
3435: drive->special.b.set_geometry = 1;
3436:
3437: tracks = drive->bios_cyl * drive->bios_head * drive->bios_sect / 63;
3438: drive->bios_sect = 63;
3439: if (xparm > 1) {
3440: drive->bios_head = xparm;
3441: drive->bios_cyl = tracks / drive->bios_head;
3442: } else {
3443: while (drive->bios_cyl >= 1024) {
3444: drive->bios_head = *heads;
3445: drive->bios_cyl = tracks / drive->bios_head;
3446: if (0 == *++heads)
3447: break;
3448: }
3449: #if FAKE_FDISK_FOR_EZDRIVE
3450: if (xparm == -1) {
3451: drive->remap_0_to_1 = 1;
3452: msg = "0->1";
3453: } else
3454: #endif /* FAKE_FDISK_FOR_EZDRIVE */
3455: if (xparm == 1) {
3456: drive->sect0 = 63;
3457: drive->bios_cyl = (tracks - 1) / drive->bios_head;
3458: msg = "+63";
3459: }
3460: printk("[remap %s] ", msg);
3461: }
3462: drive->part[0].nr_sects = current_capacity(drive);
3463: printk("[%d/%d/%d]", drive->bios_cyl, drive->bios_head, drive->bios_sect);
3464: return 1;
3465: }
3466:
3467: #if MAX_HWIFS > 1
3468: /*
3469: * save_match() is used to simplify logic in init_irq() below.
3470: *
3471: * A loophole here is that we may not know about a particular
3472: * hwif's irq until after that hwif is actually probed/initialized..
3473: * This could be a problem for the case where an hwif is on a
3474: * dual interface that requires serialization (eg. cmd640) and another
3475: * hwif using one of the same irqs is initialized beforehand.
3476: *
3477: * This routine detects and reports such situations, but does not fix them.
3478: */
3479: static void save_match (ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
3480: {
3481: ide_hwif_t *m = *match;
3482:
3483: if (m && m->hwgroup && m->hwgroup != new->hwgroup) {
3484: if (!new->hwgroup)
3485: return;
3486: printk("%s: potential irq problem with %s and %s\n", hwif->name, new->name, m->name);
3487: }
3488: if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */
3489: *match = new;
3490: }
3491: #endif /* MAX_HWIFS > 1 */
3492:
3493: /*
3494: * This routine sets up the irq for an ide interface, and creates a new
3495: * hwgroup for the irq/hwif if none was previously assigned.
3496: *
3497: * Much of the code is for correctly detecting/handling irq sharing
3498: * and irq serialization situations. This is somewhat complex because
3499: * it handles static as well as dynamic (PCMCIA) IDE interfaces.
3500: *
3501: * The SA_INTERRUPT in sa_flags means ide_intr() is always entered with
3502: * interrupts completely disabled. This can be bad for interrupt latency,
3503: * but anything else has led to problems on some machines. We re-enable
3504: * interrupts as much as we can safely do in most places.
3505: */
3506: static int init_irq (ide_hwif_t *hwif)
3507: {
3508: unsigned long flags;
3509: #if MAX_HWIFS > 1
3510: unsigned int index;
3511: #endif /* MAX_HWIFS > 1 */
3512: ide_hwgroup_t *hwgroup;
3513: ide_hwif_t *match = NULL;
3514:
3515: save_flags(flags);
3516: cli();
3517:
3518: hwif->hwgroup = NULL;
3519: #if MAX_HWIFS > 1
3520: /*
3521: * Group up with any other hwifs that share our irq(s).
3522: */
3523: for (index = 0; index < MAX_HWIFS; index++) {
3524: ide_hwif_t *h = &ide_hwifs[index];
3525: if (h->hwgroup) { /* scan only initialized hwif's */
3526: if (hwif->irq == h->irq) {
3527: hwif->sharing_irq = h->sharing_irq = 1;
3528: save_match(hwif, h, &match);
3529: }
3530: if (hwif->serialized) {
3531: ide_hwif_t *mate = &ide_hwifs[hwif->index^1];
3532: if (index == mate->index || h->irq == mate->irq)
3533: save_match(hwif, h, &match);
3534: }
3535: if (h->serialized) {
3536: ide_hwif_t *mate = &ide_hwifs[h->index^1];
3537: if (hwif->irq == mate->irq)
3538: save_match(hwif, h, &match);
3539: }
3540: }
3541: }
3542: #endif /* MAX_HWIFS > 1 */
3543: /*
3544: * If we are still without a hwgroup, then form a new one
3545: */
3546: if (match) {
3547: hwgroup = match->hwgroup;
3548: } else {
3549: hwgroup = kmalloc(sizeof(ide_hwgroup_t), GFP_KERNEL);
3550: hwgroup->hwif = hwgroup->next_hwif = hwif->next = hwif;
3551: hwgroup->rq = NULL;
3552: hwgroup->handler = NULL;
3553: if (hwif->drives[0].present)
3554: hwgroup->drive = &hwif->drives[0];
3555: else
3556: hwgroup->drive = &hwif->drives[1];
3557: hwgroup->poll_timeout = 0;
3558: hwgroup->active = 0;
3559: init_timer(&hwgroup->timer);
3560: hwgroup->timer.function = &timer_expiry;
3561: hwgroup->timer.data = (unsigned long) hwgroup;
3562: }
3563:
3564: /*
3565: * Allocate the irq, if not already obtained for another hwif
3566: */
3567: if (!match || match->irq != hwif->irq) {
3568: if (request_irq(hwif->irq, ide_intr, SA_INTERRUPT, hwif->name, hwgroup)) {
3569: if (!match)
3570: kfree(hwgroup);
3571: restore_flags(flags);
3572: return 1;
3573: }
3574: }
3575:
3576: /*
3577: * Everything is okay, so link us into the hwgroup
3578: */
3579: hwif->hwgroup = hwgroup;
3580: hwif->next = hwgroup->hwif->next;
3581: hwgroup->hwif->next = hwif;
3582:
3583: restore_flags(flags); /* safe now that hwif->hwgroup is set up */
3584:
3585: printk("%s at 0x%03x-0x%03x,0x%03x on irq %d", hwif->name,
3586: hwif->io_base, hwif->io_base+7, hwif->ctl_port, hwif->irq);
3587: if (match)
3588: printk(" (%sed with %s)", hwif->sharing_irq ? "shar" : "serializ", match->name);
3589: printk("\n");
3590: return 0;
3591: }
3592:
3593: static struct file_operations ide_fops = {
3594: NULL, /* lseek - default */
3595: block_read, /* read - general block-dev read */
3596: block_write, /* write - general block-dev write */
3597: NULL, /* readdir - bad */
3598: NULL, /* select */
3599: ide_ioctl, /* ioctl */
3600: NULL, /* mmap */
3601: ide_open, /* open */
3602: ide_release, /* release */
3603: block_fsync /* fsync */
3604: ,NULL, /* fasync */
3605: ide_check_media_change, /* check_media_change */
3606: revalidate_disk /* revalidate */
3607: };
3608:
3609: #ifdef CONFIG_PCI
3610: #if defined(CONFIG_BLK_DEV_RZ1000) || defined(CONFIG_BLK_DEV_TRITON)
3611:
3612: typedef void (ide_pci_init_proc_t)(byte, byte);
3613:
3614: /*
3615: * ide_probe_pci() scans PCI for a specific vendor/device function,
3616: * and invokes the supplied init routine for each instance detected.
3617: */
3618: static void ide_probe_pci (unsigned short vendor, unsigned short device, ide_pci_init_proc_t *init, int func_adj)
3619: {
3620: unsigned long flags;
3621: unsigned index;
3622: byte fn, bus;
3623:
3624: save_flags(flags);
3625: cli();
3626: for (index = 0; !pcibios_find_device (vendor, device, index, &bus, &fn); ++index) {
3627: init (bus, fn + func_adj);
3628: }
3629: restore_flags(flags);
3630: }
3631:
3632: #endif /* defined(CONFIG_BLK_DEV_RZ1000) || defined(CONFIG_BLK_DEV_TRITON) */
3633:
3634: static void ide_probe_promise_20246(void)
3635: {
3636: byte fn, bus;
3637: unsigned short io[6], count = 0;
3638: unsigned int reg, tmp, i;
3639: ide_hwif_t *hwif;
3640:
3641: memset(io, 0, 6 * sizeof(unsigned short));
3642: if (pcibios_find_device(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20246, 0, &bus, &fn))
3643: return;
3644: printk("ide: Promise Technology IDE Ultra-DMA 33 on PCI bus %d function %d\n", bus, fn);
3645: for (reg = PCI_BASE_ADDRESS_0; reg <= PCI_BASE_ADDRESS_5; reg += 4) {
3646: pcibios_read_config_dword(bus, fn, reg, &tmp);
3647: if (tmp & PCI_BASE_ADDRESS_SPACE_IO)
3648: io[count++] = tmp & PCI_BASE_ADDRESS_IO_MASK;
3649: }
3650: for (i = 2; i < 4; i++) {
3651: hwif = ide_hwifs + i;
3652: if (hwif->chipset == ide_generic) {
3653: printk("ide%d: overridden with command line parameter\n", i);
3654: return;
3655: }
3656: tmp = (i - 2) * 2;
3657: if (!io[tmp] || !io[tmp + 1]) {
3658: printk("ide%d: invalid port address %x, %x -- aborting\n", i, io[tmp], io[tmp + 1]);
3659: return;
3660: }
3661: hwif->io_base = io[tmp];
3662: hwif->ctl_port = io[tmp + 1] + 2;
3663: hwif->noprobe = 0;
3664: }
3665: }
3666:
3667: #endif /* CONFIG_PCI */
3668:
3669: /*
3670: * ide_init_pci() finds/initializes "known" PCI IDE interfaces
3671: *
3672: * This routine should ideally be using pcibios_find_class() to find
3673: * all IDE interfaces, but that function causes some systems to "go weird".
3674: */
3675: static void probe_for_hwifs (void)
3676: {
3677: #ifdef CONFIG_PCI
3678: /*
3679: * Find/initialize PCI IDE interfaces
3680: */
3681: if (pcibios_present()) {
3682: #ifdef CONFIG_BLK_DEV_RZ1000
3683: ide_pci_init_proc_t init_rz1000;
3684: ide_probe_pci (PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000, &init_rz1000, 0);
3685: ide_probe_pci (PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001, &init_rz1000, 0);
3686: #endif /* CONFIG_BLK_DEV_RZ1000 */
3687: #ifdef CONFIG_BLK_DEV_TRITON
3688: /*
3689: * Apparently the BIOS32 services on Intel motherboards are
3690: * buggy and won't find the PCI_DEVICE_ID_INTEL_82371_1 for us.
3691: * So instead, we search for PCI_DEVICE_ID_INTEL_82371_0,
3692: * and then add 1.
3693: */
3694: ide_probe_pci (PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371_0, &ide_init_triton, 1);
3695: ide_probe_pci (PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_1, &ide_init_triton, 0);
3696: ide_probe_pci (PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB, &ide_init_triton, 0);
1.1.1.2 root 3697: ide_probe_pci (PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5513, &ide_init_triton, 0);
3698: ide_probe_pci (PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1, &ide_init_triton, 0);
3699: ide_probe_pci (PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M5229, &ide_init_triton, 0);
1.1 root 3700: #endif /* CONFIG_BLK_DEV_TRITON */
3701: ide_probe_promise_20246();
3702: }
3703: #endif /* CONFIG_PCI */
3704: #ifdef CONFIG_BLK_DEV_CMD640
3705: {
3706: extern void ide_probe_for_cmd640x (void);
3707: ide_probe_for_cmd640x();
3708: }
3709: #endif
3710: #ifdef CONFIG_BLK_DEV_PROMISE
3711: init_dc4030();
3712: #endif
1.1.1.2 root 3713: ahci_probe_pci();
1.1 root 3714: }
3715:
3716: static int hwif_init (int h)
3717: {
3718: ide_hwif_t *hwif = &ide_hwifs[h];
3719: void (*rfn)(void);
1.1.1.2 root 3720:
1.1 root 3721: if (!hwif->present)
3722: return 0;
3723: if (!hwif->irq) {
3724: if (!(hwif->irq = default_irqs[h])) {
3725: printk("%s: DISABLED, NO IRQ\n", hwif->name);
3726: return (hwif->present = 0);
3727: }
3728: }
3729: #ifdef CONFIG_BLK_DEV_HD
3730: if (hwif->irq == HD_IRQ && hwif->io_base != HD_DATA) {
3731: printk("%s: CANNOT SHARE IRQ WITH OLD HARDDISK DRIVER (hd.c)\n", hwif->name);
3732: return (hwif->present = 0);
3733: }
3734: #endif /* CONFIG_BLK_DEV_HD */
1.1.1.2 root 3735:
1.1 root 3736: hwif->present = 0; /* we set it back to 1 if all is ok below */
3737: switch (hwif->major) {
3738: case IDE0_MAJOR: rfn = &do_ide0_request; break;
3739: #if MAX_HWIFS > 1
3740: case IDE1_MAJOR: rfn = &do_ide1_request; break;
3741: #endif
3742: #if MAX_HWIFS > 2
3743: case IDE2_MAJOR: rfn = &do_ide2_request; break;
3744: #endif
3745: #if MAX_HWIFS > 3
3746: case IDE3_MAJOR: rfn = &do_ide3_request; break;
3747: #endif
3748: default:
3749: printk("%s: request_fn NOT DEFINED\n", hwif->name);
3750: return (hwif->present = 0);
3751: }
3752: if (register_blkdev (hwif->major, hwif->name, &ide_fops)) {
3753: printk("%s: UNABLE TO GET MAJOR NUMBER %d\n", hwif->name, hwif->major);
3754: } else if (init_irq (hwif)) {
3755: printk("%s: UNABLE TO GET IRQ %d\n", hwif->name, hwif->irq);
3756: (void) unregister_blkdev (hwif->major, hwif->name);
3757: } else {
3758: init_gendisk(hwif);
3759: blk_dev[hwif->major].request_fn = rfn;
3760: read_ahead[hwif->major] = 8; /* (4kB) */
3761: hwif->present = 1; /* success */
3762: }
3763: return hwif->present;
3764: }
3765:
3766: /*
3767: * This is gets invoked once during initialization, to set *everything* up
3768: */
3769: int ide_init (void)
3770: {
3771: int index;
3772:
3773: init_ide_data ();
3774: /*
3775: * Probe for special "known" interface chipsets
3776: */
3777: probe_for_hwifs ();
3778:
3779: /*
3780: * Probe for drives in the usual way.. CMOS/BIOS, then poke at ports
3781: */
3782: for (index = 0; index < MAX_HWIFS; ++index)
3783: probe_hwif (&ide_hwifs[index]);
3784: for (index = 0; index < MAX_HWIFS; ++index)
3785: hwif_init (index);
3786:
3787: #ifdef CONFIG_BLK_DEV_IDETAPE
3788: idetape_register_chrdev(); /* Register character device interface to the ide tape */
3789: #endif /* CONFIG_BLK_DEV_IDETAPE */
1.1.1.2 root 3790:
1.1 root 3791: return 0;
3792: }
3793:
3794: #ifdef CONFIG_BLK_DEV_IDE_PCMCIA
3795: int ide_register(int io_base, int ctl_port, int irq)
3796: {
3797: int index, i, rc = -1;
3798: ide_hwif_t *hwif;
3799: ide_drive_t *drive;
3800: unsigned long flags;
3801:
3802: save_flags(flags);
3803: cli();
3804: for (index = 0; index < MAX_HWIFS; ++index) {
3805: hwif = &ide_hwifs[index];
3806: if (hwif->present) {
3807: if (hwif->io_base == io_base || hwif->ctl_port == ctl_port)
3808: break; /* this ide port already exists */
3809: } else {
3810: hwif->io_base = io_base;
3811: hwif->ctl_port = ctl_port;
3812: hwif->irq = irq;
3813: hwif->noprobe = 0;
3814: probe_hwif(hwif);
3815: if (!hwif_init(index))
3816: break;
3817: for (i = 0; i < hwif->gd->nr_real; i++) {
3818: drive = &hwif->drives[i];
3819: revalidate_disk(MKDEV(hwif->major, i<<PARTN_BITS));
3820: #ifdef CONFIG_BLK_DEV_IDECD
3821: if (drive->present && drive->media == ide_cdrom)
3822: ide_cdrom_setup(drive);
3823: #endif /* CONFIG_BLK_DEV_IDECD */
3824: }
3825: rc = index;
3826: break;
3827: }
3828: }
3829: restore_flags(flags);
3830: return rc;
3831: }
3832:
3833: void ide_unregister (unsigned int index)
3834: {
3835: struct gendisk *gd, **gdp;
3836: ide_hwif_t *hwif, *g;
3837: ide_hwgroup_t *hwgroup;
3838: int irq_count = 0;
3839: unsigned long flags;
3840:
3841: if (index >= MAX_HWIFS)
3842: return;
3843: save_flags(flags);
3844: cli();
3845: hwif = &ide_hwifs[index];
3846: if (!hwif->present || hwif->drives[0].busy || hwif->drives[1].busy) {
3847: restore_flags(flags);
3848: return;
3849: }
3850: hwif->present = 0;
3851: hwgroup = hwif->hwgroup;
3852:
3853: /*
3854: * free the irq if we were the only hwif using it
3855: */
3856: g = hwgroup->hwif;
3857: do {
3858: if (g->irq == hwif->irq)
3859: ++irq_count;
3860: g = g->next;
3861: } while (g != hwgroup->hwif);
3862: if (irq_count == 1)
3863: free_irq(hwif->irq, hwgroup);
3864:
3865: /*
3866: * Note that we only release the standard ports,
3867: * and do not even try to handle any extra ports
3868: * allocated for weird IDE interface chipsets.
3869: */
3870: release_region(hwif->io_base, 8);
3871: release_region(hwif->ctl_port, 1);
3872:
3873: /*
3874: * Remove us from the hwgroup, and free
3875: * the hwgroup if we were the only member
3876: */
3877: while (hwgroup->hwif->next != hwif)
3878: hwgroup->hwif = hwgroup->hwif->next;
3879: hwgroup->hwif->next = hwif->next;
3880: if (hwgroup->hwif == hwif)
3881: hwgroup->hwif = hwif->next;
3882: if (hwgroup->next_hwif == hwif)
3883: hwgroup->next_hwif = hwif->next;
3884: if (hwgroup->hwif == hwif)
3885: kfree(hwgroup);
3886:
3887: /*
3888: * Remove us from the kernel's knowledge
3889: */
3890: unregister_blkdev(hwif->major, hwif->name);
3891: kfree(blksize_size[hwif->major]);
3892: blk_dev[hwif->major].request_fn = NULL;
3893: blksize_size[hwif->major] = NULL;
3894: for (gdp = &gendisk_head; *gdp; gdp = &((*gdp)->next))
3895: if (*gdp == hwif->gd)
3896: break;
3897: if (*gdp == NULL)
3898: printk("gd not in disk chain!\n");
3899: else {
3900: gd = *gdp; *gdp = gd->next;
3901: kfree(gd->sizes);
3902: kfree(gd->part);
3903: kfree(gd);
3904: }
3905: init_hwif_data (index); /* restore hwif data to pristine status */
3906: restore_flags(flags);
3907: }
3908: #endif /* CONFIG_BLK_DEV_IDE_PCMCIA */
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