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