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