1/* $Id: $ 2 * linux/drivers/scsi/wd7000.c 3 * 4 * Copyright (C) 1992 Thomas Wuensche 5 * closely related to the aha1542 driver from Tommy Thorn 6 * ( as close as different hardware allows on a lowlevel-driver :-) ) 7 * 8 * Revised (and renamed) by John Boyd <boyd@cis.ohio-state.edu> to 9 * accommodate Eric Youngdale's modifications to scsi.c. Nov 1992. 10 * 11 * Additional changes to support scatter/gather. Dec. 1992. tw/jb 12 * 13 * No longer tries to reset SCSI bus at boot (it wasn't working anyway). 14 * Rewritten to support multiple host adapters. 15 * Miscellaneous cleanup. 16 * So far, still doesn't do reset or abort correctly, since I have no idea 17 * how to do them with this board (8^(. Jan 1994 jb 18 * 19 * This driver now supports both of the two standard configurations (per 20 * the 3.36 Owner's Manual, my latest reference) by the same method as 21 * before; namely, by looking for a BIOS signature. Thus, the location of 22 * the BIOS signature determines the board configuration. Until I have 23 * time to do something more flexible, users should stick to one of the 24 * following: 25 * 26 * Standard configuration for single-adapter systems: 27 * - BIOS at CE00h 28 * - I/O base address 350h 29 * - IRQ level 15 30 * - DMA channel 6 31 * Standard configuration for a second adapter in a system: 32 * - BIOS at C800h 33 * - I/O base address 330h 34 * - IRQ level 11 35 * - DMA channel 5 36 * 37 * Anyone who can recompile the kernel is welcome to add others as need 38 * arises, but unpredictable results may occur if there are conflicts. 39 * In any event, if there are multiple adapters in a system, they MUST 40 * use different I/O bases, IRQ levels, and DMA channels, since they will be 41 * indistinguishable (and in direct conflict) otherwise. 42 * 43 * As a point of information, the NO_OP command toggles the CMD_RDY bit 44 * of the status port, and this fact could be used as a test for the I/O 45 * base address (or more generally, board detection). There is an interrupt 46 * status port, so IRQ probing could also be done. I suppose the full 47 * DMA diagnostic could be used to detect the DMA channel being used. I 48 * haven't done any of this, though, because I think there's too much of 49 * a chance that such explorations could be destructive, if some other 50 * board's resources are used inadvertently. So, call me a wimp, but I 51 * don't want to try it. The only kind of exploration I trust is memory 52 * exploration, since it's more certain that reading memory won't be 53 * destructive. 54 * 55 * More to my liking would be a LILO boot command line specification, such 56 * as is used by the aha152x driver (and possibly others). I'll look into 57 * it, as I have time... 58 * 59 * I get mail occasionally from people who either are using or are 60 * considering using a WD7000 with Linux. There is a variety of 61 * nomenclature describing WD7000's. To the best of my knowledge, the 62 * following is a brief summary (from an old WD doc - I don't work for 63 * them or anything like that): 64 * 65 * WD7000-FASST2: This is a WD7000 board with the real-mode SST ROM BIOS 66 * installed. Last I heard, the BIOS was actually done by Columbia 67 * Data Products. The BIOS is only used by this driver (and thus 68 * by Linux) to identify the board; none of it can be executed under 69 * Linux. 70 * 71 * WD7000-ASC: This is the original adapter board, with or without BIOS. 72 * The board uses a WD33C93 or WD33C93A SBIC, which in turn is 73 * controlled by an onboard Z80 processor. The board interface 74 * visible to the host CPU is defined effectively by the Z80's 75 * firmware, and it is this firmware's revision level that is 76 * determined and reported by this driver. (The version of the 77 * on-board BIOS is of no interest whatsoever.) The host CPU has 78 * no access to the SBIC; hence the fact that it is a WD33C93 is 79 * also of no interest to this driver. 80 * 81 * WD7000-AX: 82 * WD7000-MX: 83 * WD7000-EX: These are newer versions of the WD7000-ASC. The -ASC is 84 * largely built from discrete components; these boards use more 85 * integration. The -AX is an ISA bus board (like the -ASC), 86 * the -MX is an MCA (i.e., PS/2) bus board), and the -EX is an 87 * EISA bus board. 88 * 89 * At the time of my documentation, the -?X boards were "future" products, 90 * and were not yet available. However, I vaguely recall that Thomas 91 * Wuensche had an -AX, so I believe at least it is supported by this 92 * driver. I have no personal knowledge of either -MX or -EX boards. 93 * 94 * P.S. Just recently, I've discovered (directly from WD and Future 95 * Domain) that all but the WD7000-EX have been out of production for 96 * two years now. FD has production rights to the 7000-EX, and are 97 * producing it under a new name, and with a new BIOS. If anyone has 98 * one of the FD boards, it would be nice to come up with a signature 99 * for it. 100 * J.B. Jan 1994. 101 * 102 * 103 * Revisions by Miroslav Zagorac <zaga@fly.cc.fer.hr> 104 * 105 * 08/24/1996. 106 * 107 * Enhancement for wd7000_detect function has been made, so you don't have 108 * to enter BIOS ROM address in initialisation data (see struct Config). 109 * We cannot detect IRQ, DMA and I/O base address for now, so we have to 110 * enter them as arguments while wd_7000 is detected. If someone has IRQ, 111 * DMA or I/O base address set to some other value, he can enter them in 112 * configuration without any problem. Also I wrote a function wd7000_setup, 113 * so now you can enter WD-7000 definition as kernel arguments, 114 * as in lilo.conf: 115 * 116 * append="wd7000=IRQ,DMA,IO" 117 * 118 * PS: If card BIOS ROM is disabled, function wd7000_detect now will recognize 119 * adapter, unlike the old one. Anyway, BIOS ROM from WD7000 adapter is 120 * useless for Linux. B^) 121 * 122 * 123 * 09/06/1996. 124 * 125 * Autodetecting of I/O base address from wd7000_detect function is removed, 126 * some little bugs removed, etc... 127 * 128 * Thanks to Roger Scott for driver debugging. 129 * 130 * 06/07/1997 131 * 132 * Added support for /proc file system (/proc/scsi/wd7000/[0...] files). 133 * Now, driver can handle hard disks with capacity >1GB. 134 * 135 * 01/15/1998 136 * 137 * Added support for BUS_ON and BUS_OFF parameters in config line. 138 * Miscellaneous cleanup. 139 * 140 * 03/01/1998 141 * 142 * WD7000 driver now work on kernels >= 2.1.x 143 * 144 * 145 * 12/31/2001 - Arnaldo Carvalho de Melo <acme@conectiva.com.br> 146 * 147 * use host->host_lock, not io_request_lock, cleanups 148 * 149 * 2002/10/04 - Alan Cox <alan@lxorguk.ukuu.org.uk> 150 * 151 * Use dev_id for interrupts, kill __func__ pasting 152 * Add a lock for the scb pool, clean up all other cli/sti usage stuff 153 * Use the adapter lock for the other places we had the cli's 154 * 155 * 2002/10/06 - Alan Cox <alan@lxorguk.ukuu.org.uk> 156 * 157 * Switch to new style error handling 158 * Clean up delay to udelay, and yielding sleeps 159 * Make host reset actually reset the card 160 * Make everything static 161 * 162 * 2003/02/12 - Christoph Hellwig <hch@infradead.org> 163 * 164 * Cleaned up host template definition 165 * Removed now obsolete wd7000.h 166 */ 167 168#include <linux/delay.h> 169#include <linux/module.h> 170#include <linux/interrupt.h> 171#include <linux/kernel.h> 172#include <linux/types.h> 173#include <linux/string.h> 174#include <linux/spinlock.h> 175#include <linux/ioport.h> 176#include <linux/proc_fs.h> 177#include <linux/blkdev.h> 178#include <linux/init.h> 179#include <linux/stat.h> 180#include <linux/io.h> 181 182#include <asm/dma.h> 183 184#include <scsi/scsi.h> 185#include <scsi/scsi_cmnd.h> 186#include <scsi/scsi_device.h> 187#include <scsi/scsi_host.h> 188#include <scsi/scsicam.h> 189 190 191#undef WD7000_DEBUG /* general debug */ 192#ifdef WD7000_DEBUG 193#define dprintk printk 194#else 195#define dprintk(format,args...) 196#endif 197 198/* 199 * Mailbox structure sizes. 200 * I prefer to keep the number of ICMBs much larger than the number of 201 * OGMBs. OGMBs are used very quickly by the driver to start one or 202 * more commands, while ICMBs are used by the host adapter per command. 203 */ 204#define OGMB_CNT 16 205#define ICMB_CNT 32 206 207/* 208 * Scb's are shared by all active adapters. So, if they all become busy, 209 * callers may be made to wait in alloc_scbs for them to free. That can 210 * be avoided by setting MAX_SCBS to NUM_CONFIG * WD7000_Q. If you'd 211 * rather conserve memory, use a smaller number (> 0, of course) - things 212 * will should still work OK. 213 */ 214#define MAX_SCBS 32 215 216/* 217 * In this version, sg_tablesize now defaults to WD7000_SG, and will 218 * be set to SG_NONE for older boards. This is the reverse of the 219 * previous default, and was changed so that the driver-level 220 * scsi_host_template would reflect the driver's support for scatter/ 221 * gather. 222 * 223 * Also, it has been reported that boards at Revision 6 support scatter/ 224 * gather, so the new definition of an "older" board has been changed 225 * accordingly. 226 */ 227#define WD7000_Q 16 228#define WD7000_SG 16 229 230 231/* 232 * WD7000-specific mailbox structure 233 * 234 */ 235typedef volatile struct mailbox { 236 unchar status; 237 unchar scbptr[3]; /* SCSI-style - MSB first (big endian) */ 238} Mailbox; 239 240/* 241 * This structure should contain all per-adapter global data. I.e., any 242 * new global per-adapter data should put in here. 243 */ 244typedef struct adapter { 245 struct Scsi_Host *sh; /* Pointer to Scsi_Host structure */ 246 int iobase; /* This adapter's I/O base address */ 247 int irq; /* This adapter's IRQ level */ 248 int dma; /* This adapter's DMA channel */ 249 int int_counter; /* This adapter's interrupt counter */ 250 int bus_on; /* This adapter's BUS_ON time */ 251 int bus_off; /* This adapter's BUS_OFF time */ 252 struct { /* This adapter's mailboxes */ 253 Mailbox ogmb[OGMB_CNT]; /* Outgoing mailboxes */ 254 Mailbox icmb[ICMB_CNT]; /* Incoming mailboxes */ 255 } mb; 256 int next_ogmb; /* to reduce contention at mailboxes */ 257 unchar control; /* shadows CONTROL port value */ 258 unchar rev1, rev2; /* filled in by wd7000_revision */ 259} Adapter; 260 261/* 262 * (linear) base address for ROM BIOS 263 */ 264static const long wd7000_biosaddr[] = { 265 0xc0000, 0xc2000, 0xc4000, 0xc6000, 0xc8000, 0xca000, 0xcc000, 0xce000, 266 0xd0000, 0xd2000, 0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0xde000 267}; 268#define NUM_ADDRS ARRAY_SIZE(wd7000_biosaddr) 269 270static const unsigned short wd7000_iobase[] = { 271 0x0300, 0x0308, 0x0310, 0x0318, 0x0320, 0x0328, 0x0330, 0x0338, 272 0x0340, 0x0348, 0x0350, 0x0358, 0x0360, 0x0368, 0x0370, 0x0378, 273 0x0380, 0x0388, 0x0390, 0x0398, 0x03a0, 0x03a8, 0x03b0, 0x03b8, 274 0x03c0, 0x03c8, 0x03d0, 0x03d8, 0x03e0, 0x03e8, 0x03f0, 0x03f8 275}; 276#define NUM_IOPORTS ARRAY_SIZE(wd7000_iobase) 277 278static const short wd7000_irq[] = { 3, 4, 5, 7, 9, 10, 11, 12, 14, 15 }; 279#define NUM_IRQS ARRAY_SIZE(wd7000_irq) 280 281static const short wd7000_dma[] = { 5, 6, 7 }; 282#define NUM_DMAS ARRAY_SIZE(wd7000_dma) 283 284/* 285 * The following is set up by wd7000_detect, and used thereafter for 286 * proc and other global ookups 287 */ 288 289#define UNITS 8 290static struct Scsi_Host *wd7000_host[UNITS]; 291 292#define BUS_ON 64 /* x 125ns = 8000ns (BIOS default) */ 293#define BUS_OFF 15 /* x 125ns = 1875ns (BIOS default) */ 294 295/* 296 * Standard Adapter Configurations - used by wd7000_detect 297 */ 298typedef struct { 299 short irq; /* IRQ level */ 300 short dma; /* DMA channel */ 301 unsigned iobase; /* I/O base address */ 302 short bus_on; /* Time that WD7000 spends on the AT-bus when */ 303 /* transferring data. BIOS default is 8000ns. */ 304 short bus_off; /* Time that WD7000 spends OFF THE BUS after */ 305 /* while it is transferring data. */ 306 /* BIOS default is 1875ns */ 307} Config; 308 309/* 310 * Add here your configuration... 311 */ 312static Config configs[] = { 313 {15, 6, 0x350, BUS_ON, BUS_OFF}, /* defaults for single adapter */ 314 {11, 5, 0x320, BUS_ON, BUS_OFF}, /* defaults for second adapter */ 315 {7, 6, 0x350, BUS_ON, BUS_OFF}, /* My configuration (Zaga) */ 316 {-1, -1, 0x0, BUS_ON, BUS_OFF} /* Empty slot */ 317}; 318#define NUM_CONFIGS ARRAY_SIZE(configs) 319 320/* 321 * The following list defines strings to look for in the BIOS that identify 322 * it as the WD7000-FASST2 SST BIOS. I suspect that something should be 323 * added for the Future Domain version. 324 */ 325typedef struct signature { 326 const char *sig; /* String to look for */ 327 unsigned long ofs; /* offset from BIOS base address */ 328 unsigned len; /* length of string */ 329} Signature; 330 331static const Signature signatures[] = { 332 {"SSTBIOS", 0x0000d, 7} /* "SSTBIOS" @ offset 0x0000d */ 333}; 334#define NUM_SIGNATURES ARRAY_SIZE(signatures) 335 336 337/* 338 * I/O Port Offsets and Bit Definitions 339 * 4 addresses are used. Those not defined here are reserved. 340 */ 341#define ASC_STAT 0 /* Status, Read */ 342#define ASC_COMMAND 0 /* Command, Write */ 343#define ASC_INTR_STAT 1 /* Interrupt Status, Read */ 344#define ASC_INTR_ACK 1 /* Acknowledge, Write */ 345#define ASC_CONTROL 2 /* Control, Write */ 346 347/* 348 * ASC Status Port 349 */ 350#define INT_IM 0x80 /* Interrupt Image Flag */ 351#define CMD_RDY 0x40 /* Command Port Ready */ 352#define CMD_REJ 0x20 /* Command Port Byte Rejected */ 353#define ASC_INIT 0x10 /* ASC Initialized Flag */ 354#define ASC_STATMASK 0xf0 /* The lower 4 Bytes are reserved */ 355 356/* 357 * COMMAND opcodes 358 * 359 * Unfortunately, I have no idea how to properly use some of these commands, 360 * as the OEM manual does not make it clear. I have not been able to use 361 * enable/disable unsolicited interrupts or the reset commands with any 362 * discernible effect whatsoever. I think they may be related to certain 363 * ICB commands, but again, the OEM manual doesn't make that clear. 364 */ 365#define NO_OP 0 /* NO-OP toggles CMD_RDY bit in ASC_STAT */ 366#define INITIALIZATION 1 /* initialization (10 bytes) */ 367#define DISABLE_UNS_INTR 2 /* disable unsolicited interrupts */ 368#define ENABLE_UNS_INTR 3 /* enable unsolicited interrupts */ 369#define INTR_ON_FREE_OGMB 4 /* interrupt on free OGMB */ 370#define SOFT_RESET 5 /* SCSI bus soft reset */ 371#define HARD_RESET_ACK 6 /* SCSI bus hard reset acknowledge */ 372#define START_OGMB 0x80 /* start command in OGMB (n) */ 373#define SCAN_OGMBS 0xc0 /* start multiple commands, signature (n) */ 374 /* where (n) = lower 6 bits */ 375/* 376 * For INITIALIZATION: 377 */ 378typedef struct initCmd { 379 unchar op; /* command opcode (= 1) */ 380 unchar ID; /* Adapter's SCSI ID */ 381 unchar bus_on; /* Bus on time, x 125ns (see below) */ 382 unchar bus_off; /* Bus off time, "" "" */ 383 unchar rsvd; /* Reserved */ 384 unchar mailboxes[3]; /* Address of Mailboxes, MSB first */ 385 unchar ogmbs; /* Number of outgoing MBs, max 64, 0,1 = 1 */ 386 unchar icmbs; /* Number of incoming MBs, "" "" */ 387} InitCmd; 388 389/* 390 * Interrupt Status Port - also returns diagnostic codes at ASC reset 391 * 392 * if msb is zero, the lower bits are diagnostic status 393 * Diagnostics: 394 * 01 No diagnostic error occurred 395 * 02 RAM failure 396 * 03 FIFO R/W failed 397 * 04 SBIC register read/write failed 398 * 05 Initialization D-FF failed 399 * 06 Host IRQ D-FF failed 400 * 07 ROM checksum error 401 * Interrupt status (bitwise): 402 * 10NNNNNN outgoing mailbox NNNNNN is free 403 * 11NNNNNN incoming mailbox NNNNNN needs service 404 */ 405#define MB_INTR 0xC0 /* Mailbox Service possible/required */ 406#define IMB_INTR 0x40 /* 1 Incoming / 0 Outgoing */ 407#define MB_MASK 0x3f /* mask for mailbox number */ 408 409/* 410 * CONTROL port bits 411 */ 412#define INT_EN 0x08 /* Interrupt Enable */ 413#define DMA_EN 0x04 /* DMA Enable */ 414#define SCSI_RES 0x02 /* SCSI Reset */ 415#define ASC_RES 0x01 /* ASC Reset */ 416 417/* 418 * Driver data structures: 419 * - mb and scbs are required for interfacing with the host adapter. 420 * An SCB has extra fields not visible to the adapter; mb's 421 * _cannot_ do this, since the adapter assumes they are contiguous in 422 * memory, 4 bytes each, with ICMBs following OGMBs, and uses this fact 423 * to access them. 424 * - An icb is for host-only (non-SCSI) commands. ICBs are 16 bytes each; 425 * the additional bytes are used only by the driver. 426 * - For now, a pool of SCBs are kept in global storage by this driver, 427 * and are allocated and freed as needed. 428 * 429 * The 7000-FASST2 marks OGMBs empty as soon as it has _started_ a command, 430 * not when it has finished. Since the SCB must be around for completion, 431 * problems arise when SCBs correspond to OGMBs, which may be reallocated 432 * earlier (or delayed unnecessarily until a command completes). 433 * Mailboxes are used as transient data structures, simply for 434 * carrying SCB addresses to/from the 7000-FASST2. 435 * 436 * Note also since SCBs are not "permanently" associated with mailboxes, 437 * there is no need to keep a global list of scsi_cmnd pointers indexed 438 * by OGMB. Again, SCBs reference their scsi_cmnds directly, so mailbox 439 * indices need not be involved. 440 */ 441 442/* 443 * WD7000-specific scatter/gather element structure 444 */ 445typedef struct sgb { 446 unchar len[3]; 447 unchar ptr[3]; /* Also SCSI-style - MSB first */ 448} Sgb; 449 450typedef struct scb { /* Command Control Block 5.4.1 */ 451 unchar op; /* Command Control Block Operation Code */ 452 unchar idlun; /* op=0,2:Target Id, op=1:Initiator Id */ 453 /* Outbound data transfer, length is checked */ 454 /* Inbound data transfer, length is checked */ 455 /* Logical Unit Number */ 456 unchar cdb[12]; /* SCSI Command Block */ 457 volatile unchar status; /* SCSI Return Status */ 458 volatile unchar vue; /* Vendor Unique Error Code */ 459 unchar maxlen[3]; /* Maximum Data Transfer Length */ 460 unchar dataptr[3]; /* SCSI Data Block Pointer */ 461 unchar linkptr[3]; /* Next Command Link Pointer */ 462 unchar direc; /* Transfer Direction */ 463 unchar reserved2[6]; /* SCSI Command Descriptor Block */ 464 /* end of hardware SCB */ 465 struct scsi_cmnd *SCpnt;/* scsi_cmnd using this SCB */ 466 Sgb sgb[WD7000_SG]; /* Scatter/gather list for this SCB */ 467 Adapter *host; /* host adapter */ 468 struct scb *next; /* for lists of scbs */ 469} Scb; 470 471/* 472 * This driver is written to allow host-only commands to be executed. 473 * These use a 16-byte block called an ICB. The format is extended by the 474 * driver to 18 bytes, to support the status returned in the ICMB and 475 * an execution phase code. 476 * 477 * There are other formats besides these; these are the ones I've tried 478 * to use. Formats for some of the defined ICB opcodes are not defined 479 * (notably, get/set unsolicited interrupt status) in my copy of the OEM 480 * manual, and others are ambiguous/hard to follow. 481 */ 482#define ICB_OP_MASK 0x80 /* distinguishes scbs from icbs */ 483#define ICB_OP_OPEN_RBUF 0x80 /* open receive buffer */ 484#define ICB_OP_RECV_CMD 0x81 /* receive command from initiator */ 485#define ICB_OP_RECV_DATA 0x82 /* receive data from initiator */ 486#define ICB_OP_RECV_SDATA 0x83 /* receive data with status from init. */ 487#define ICB_OP_SEND_DATA 0x84 /* send data with status to initiator */ 488#define ICB_OP_SEND_STAT 0x86 /* send command status to initiator */ 489 /* 0x87 is reserved */ 490#define ICB_OP_READ_INIT 0x88 /* read initialization bytes */ 491#define ICB_OP_READ_ID 0x89 /* read adapter's SCSI ID */ 492#define ICB_OP_SET_UMASK 0x8A /* set unsolicited interrupt mask */ 493#define ICB_OP_GET_UMASK 0x8B /* read unsolicited interrupt mask */ 494#define ICB_OP_GET_REVISION 0x8C /* read firmware revision level */ 495#define ICB_OP_DIAGNOSTICS 0x8D /* execute diagnostics */ 496#define ICB_OP_SET_EPARMS 0x8E /* set execution parameters */ 497#define ICB_OP_GET_EPARMS 0x8F /* read execution parameters */ 498 499typedef struct icbRecvCmd { 500 unchar op; 501 unchar IDlun; /* Initiator SCSI ID/lun */ 502 unchar len[3]; /* command buffer length */ 503 unchar ptr[3]; /* command buffer address */ 504 unchar rsvd[7]; /* reserved */ 505 volatile unchar vue; /* vendor-unique error code */ 506 volatile unchar status; /* returned (icmb) status */ 507 volatile unchar phase; /* used by interrupt handler */ 508} IcbRecvCmd; 509 510typedef struct icbSendStat { 511 unchar op; 512 unchar IDlun; /* Target SCSI ID/lun */ 513 unchar stat; /* (outgoing) completion status byte 1 */ 514 unchar rsvd[12]; /* reserved */ 515 volatile unchar vue; /* vendor-unique error code */ 516 volatile unchar status; /* returned (icmb) status */ 517 volatile unchar phase; /* used by interrupt handler */ 518} IcbSendStat; 519 520typedef struct icbRevLvl { 521 unchar op; 522 volatile unchar primary; /* primary revision level (returned) */ 523 volatile unchar secondary; /* secondary revision level (returned) */ 524 unchar rsvd[12]; /* reserved */ 525 volatile unchar vue; /* vendor-unique error code */ 526 volatile unchar status; /* returned (icmb) status */ 527 volatile unchar phase; /* used by interrupt handler */ 528} IcbRevLvl; 529 530typedef struct icbUnsMask { /* I'm totally guessing here */ 531 unchar op; 532 volatile unchar mask[14]; /* mask bits */ 533#if 0 534 unchar rsvd[12]; /* reserved */ 535#endif 536 volatile unchar vue; /* vendor-unique error code */ 537 volatile unchar status; /* returned (icmb) status */ 538 volatile unchar phase; /* used by interrupt handler */ 539} IcbUnsMask; 540 541typedef struct icbDiag { 542 unchar op; 543 unchar type; /* diagnostics type code (0-3) */ 544 unchar len[3]; /* buffer length */ 545 unchar ptr[3]; /* buffer address */ 546 unchar rsvd[7]; /* reserved */ 547 volatile unchar vue; /* vendor-unique error code */ 548 volatile unchar status; /* returned (icmb) status */ 549 volatile unchar phase; /* used by interrupt handler */ 550} IcbDiag; 551 552#define ICB_DIAG_POWERUP 0 /* Power-up diags only */ 553#define ICB_DIAG_WALKING 1 /* walking 1's pattern */ 554#define ICB_DIAG_DMA 2 /* DMA - system memory diags */ 555#define ICB_DIAG_FULL 3 /* do both 1 & 2 */ 556 557typedef struct icbParms { 558 unchar op; 559 unchar rsvd1; /* reserved */ 560 unchar len[3]; /* parms buffer length */ 561 unchar ptr[3]; /* parms buffer address */ 562 unchar idx[2]; /* index (MSB-LSB) */ 563 unchar rsvd2[5]; /* reserved */ 564 volatile unchar vue; /* vendor-unique error code */ 565 volatile unchar status; /* returned (icmb) status */ 566 volatile unchar phase; /* used by interrupt handler */ 567} IcbParms; 568 569typedef struct icbAny { 570 unchar op; 571 unchar data[14]; /* format-specific data */ 572 volatile unchar vue; /* vendor-unique error code */ 573 volatile unchar status; /* returned (icmb) status */ 574 volatile unchar phase; /* used by interrupt handler */ 575} IcbAny; 576 577typedef union icb { 578 unchar op; /* ICB opcode */ 579 IcbRecvCmd recv_cmd; /* format for receive command */ 580 IcbSendStat send_stat; /* format for send status */ 581 IcbRevLvl rev_lvl; /* format for get revision level */ 582 IcbDiag diag; /* format for execute diagnostics */ 583 IcbParms eparms; /* format for get/set exec parms */ 584 IcbAny icb; /* generic format */ 585 unchar data[18]; 586} Icb; 587 588#ifdef MODULE 589static char *wd7000; 590module_param(wd7000, charp, 0); 591#endif 592 593/* 594 * Driver SCB structure pool. 595 * 596 * The SCBs declared here are shared by all host adapters; hence, this 597 * structure is not part of the Adapter structure. 598 */ 599static Scb scbs[MAX_SCBS]; 600static Scb *scbfree; /* free list */ 601static int freescbs = MAX_SCBS; /* free list counter */ 602static spinlock_t scbpool_lock; /* guards the scb free list and count */ 603 604/* 605 * END of data/declarations - code follows. 606 */ 607static void __init setup_error(char *mesg, int *ints) 608{ 609 if (ints[0] == 3) 610 printk(KERN_ERR "wd7000_setup: \"wd7000=%d,%d,0x%x\" -> %s\n", ints[1], ints[2], ints[3], mesg); 611 else if (ints[0] == 4) 612 printk(KERN_ERR "wd7000_setup: \"wd7000=%d,%d,0x%x,%d\" -> %s\n", ints[1], ints[2], ints[3], ints[4], mesg); 613 else 614 printk(KERN_ERR "wd7000_setup: \"wd7000=%d,%d,0x%x,%d,%d\" -> %s\n", ints[1], ints[2], ints[3], ints[4], ints[5], mesg); 615} 616 617 618/* 619 * Note: You can now set these options from the kernel's "command line". 620 * The syntax is: 621 * 622 * wd7000=<IRQ>,<DMA>,<IO>[,<BUS_ON>[,<BUS_OFF>]] 623 * 624 * , where BUS_ON and BUS_OFF are in nanoseconds. BIOS default values 625 * are 8000ns for BUS_ON and 1875ns for BUS_OFF. 626 * eg: 627 * wd7000=7,6,0x350 628 * 629 * will configure the driver for a WD-7000 controller 630 * using IRQ 15 with a DMA channel 6, at IO base address 0x350. 631 */ 632static int __init wd7000_setup(char *str) 633{ 634 static short wd7000_card_num; /* .bss will zero this */ 635 short i; 636 int ints[6]; 637 638 (void) get_options(str, ARRAY_SIZE(ints), ints); 639 640 if (wd7000_card_num >= NUM_CONFIGS) { 641 printk(KERN_ERR "%s: Too many \"wd7000=\" configurations in " "command line!\n", __func__); 642 return 0; 643 } 644 645 if ((ints[0] < 3) || (ints[0] > 5)) { 646 printk(KERN_ERR "%s: Error in command line! " "Usage: wd7000=<IRQ>,<DMA>,IO>[,<BUS_ON>" "[,<BUS_OFF>]]\n", __func__); 647 } else { 648 for (i = 0; i < NUM_IRQS; i++) 649 if (ints[1] == wd7000_irq[i]) 650 break; 651 652 if (i == NUM_IRQS) { 653 setup_error("invalid IRQ.", ints); 654 return 0; 655 } else 656 configs[wd7000_card_num].irq = ints[1]; 657 658 for (i = 0; i < NUM_DMAS; i++) 659 if (ints[2] == wd7000_dma[i]) 660 break; 661 662 if (i == NUM_DMAS) { 663 setup_error("invalid DMA channel.", ints); 664 return 0; 665 } else 666 configs[wd7000_card_num].dma = ints[2]; 667 668 for (i = 0; i < NUM_IOPORTS; i++) 669 if (ints[3] == wd7000_iobase[i]) 670 break; 671 672 if (i == NUM_IOPORTS) { 673 setup_error("invalid I/O base address.", ints); 674 return 0; 675 } else 676 configs[wd7000_card_num].iobase = ints[3]; 677 678 if (ints[0] > 3) { 679 if ((ints[4] < 500) || (ints[4] > 31875)) { 680 setup_error("BUS_ON value is out of range (500" " to 31875 nanoseconds)!", ints); 681 configs[wd7000_card_num].bus_on = BUS_ON; 682 } else 683 configs[wd7000_card_num].bus_on = ints[4] / 125; 684 } else 685 configs[wd7000_card_num].bus_on = BUS_ON; 686 687 if (ints[0] > 4) { 688 if ((ints[5] < 500) || (ints[5] > 31875)) { 689 setup_error("BUS_OFF value is out of range (500" " to 31875 nanoseconds)!", ints); 690 configs[wd7000_card_num].bus_off = BUS_OFF; 691 } else 692 configs[wd7000_card_num].bus_off = ints[5] / 125; 693 } else 694 configs[wd7000_card_num].bus_off = BUS_OFF; 695 696 if (wd7000_card_num) { 697 for (i = 0; i < (wd7000_card_num - 1); i++) { 698 int j = i + 1; 699 700 for (; j < wd7000_card_num; j++) 701 if (configs[i].irq == configs[j].irq) { 702 setup_error("duplicated IRQ!", ints); 703 return 0; 704 } 705 if (configs[i].dma == configs[j].dma) { 706 setup_error("duplicated DMA " "channel!", ints); 707 return 0; 708 } 709 if (configs[i].iobase == configs[j].iobase) { 710 setup_error("duplicated I/O " "base address!", ints); 711 return 0; 712 } 713 } 714 } 715 716 dprintk(KERN_DEBUG "wd7000_setup: IRQ=%d, DMA=%d, I/O=0x%x, " 717 "BUS_ON=%dns, BUS_OFF=%dns\n", configs[wd7000_card_num].irq, configs[wd7000_card_num].dma, configs[wd7000_card_num].iobase, configs[wd7000_card_num].bus_on * 125, configs[wd7000_card_num].bus_off * 125); 718 719 wd7000_card_num++; 720 } 721 return 1; 722} 723 724__setup("wd7000=", wd7000_setup); 725 726static inline void any2scsi(unchar * scsi, int any) 727{ 728 *scsi++ = (unsigned)any >> 16; 729 *scsi++ = (unsigned)any >> 8; 730 *scsi++ = any; 731} 732 733static inline int scsi2int(unchar * scsi) 734{ 735 return (scsi[0] << 16) | (scsi[1] << 8) | scsi[2]; 736} 737 738static inline void wd7000_enable_intr(Adapter * host) 739{ 740 host->control |= INT_EN; 741 outb(host->control, host->iobase + ASC_CONTROL); 742} 743 744 745static inline void wd7000_enable_dma(Adapter * host) 746{ 747 unsigned long flags; 748 host->control |= DMA_EN; 749 outb(host->control, host->iobase + ASC_CONTROL); 750 751 flags = claim_dma_lock(); 752 set_dma_mode(host->dma, DMA_MODE_CASCADE); 753 enable_dma(host->dma); 754 release_dma_lock(flags); 755 756} 757 758 759#define WAITnexttimeout 200 /* 2 seconds */ 760 761static inline short WAIT(unsigned port, unsigned mask, unsigned allof, unsigned noneof) 762{ 763 unsigned WAITbits; 764 unsigned long WAITtimeout = jiffies + WAITnexttimeout; 765 766 while (time_before_eq(jiffies, WAITtimeout)) { 767 WAITbits = inb(port) & mask; 768 769 if (((WAITbits & allof) == allof) && ((WAITbits & noneof) == 0)) 770 return (0); 771 } 772 773 return (1); 774} 775 776 777static inline int command_out(Adapter * host, unchar * cmd, int len) 778{ 779 if (!WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) { 780 while (len--) { 781 do { 782 outb(*cmd, host->iobase + ASC_COMMAND); 783 WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0); 784 } while (inb(host->iobase + ASC_STAT) & CMD_REJ); 785 786 cmd++; 787 } 788 789 return (1); 790 } 791 792 printk(KERN_WARNING "wd7000 command_out: WAIT failed(%d)\n", len + 1); 793 794 return (0); 795} 796 797 798/* 799 * This version of alloc_scbs is in preparation for supporting multiple 800 * commands per lun and command chaining, by queueing pending commands. 801 * We will need to allocate Scbs in blocks since they will wait to be 802 * executed so there is the possibility of deadlock otherwise. 803 * Also, to keep larger requests from being starved by smaller requests, 804 * we limit access to this routine with an internal busy flag, so that 805 * the satisfiability of a request is not dependent on the size of the 806 * request. 807 */ 808static inline Scb *alloc_scbs(struct Scsi_Host *host, int needed) 809{ 810 Scb *scb, *p = NULL; 811 unsigned long flags; 812 unsigned long timeout = jiffies + WAITnexttimeout; 813 unsigned long now; 814 int i; 815 816 if (needed <= 0) 817 return (NULL); /* sanity check */ 818 819 spin_unlock_irq(host->host_lock); 820 821 retry: 822 while (freescbs < needed) { 823 timeout = jiffies + WAITnexttimeout; 824 do { 825 /* FIXME: can we actually just yield here ?? */ 826 for (now = jiffies; now == jiffies;) 827 cpu_relax(); /* wait a jiffy */ 828 } while (freescbs < needed && time_before_eq(jiffies, timeout)); 829 /* 830 * If we get here with enough free Scbs, we can take them. 831 * Otherwise, we timed out and didn't get enough. 832 */ 833 if (freescbs < needed) { 834 printk(KERN_ERR "wd7000: can't get enough free SCBs.\n"); 835 return (NULL); 836 } 837 } 838 839 /* Take the lock, then check we didn't get beaten, if so try again */ 840 spin_lock_irqsave(&scbpool_lock, flags); 841 if (freescbs < needed) { 842 spin_unlock_irqrestore(&scbpool_lock, flags); 843 goto retry; 844 } 845 846 scb = scbfree; 847 freescbs -= needed; 848 for (i = 0; i < needed; i++) { 849 p = scbfree; 850 scbfree = p->next; 851 } 852 p->next = NULL; 853 854 spin_unlock_irqrestore(&scbpool_lock, flags); 855 856 spin_lock_irq(host->host_lock); 857 return (scb); 858} 859 860 861static inline void free_scb(Scb * scb) 862{ 863 unsigned long flags; 864 865 spin_lock_irqsave(&scbpool_lock, flags); 866 867 memset(scb, 0, sizeof(Scb)); 868 scb->next = scbfree; 869 scbfree = scb; 870 freescbs++; 871 872 spin_unlock_irqrestore(&scbpool_lock, flags); 873} 874 875 876static inline void init_scbs(void) 877{ 878 int i; 879 880 spin_lock_init(&scbpool_lock); 881 882 /* This is only ever called before the SCB pool is active */ 883 884 scbfree = &(scbs[0]); 885 memset(scbs, 0, sizeof(scbs)); 886 for (i = 0; i < MAX_SCBS - 1; i++) { 887 scbs[i].next = &(scbs[i + 1]); 888 scbs[i].SCpnt = NULL; 889 } 890 scbs[MAX_SCBS - 1].next = NULL; 891 scbs[MAX_SCBS - 1].SCpnt = NULL; 892} 893 894 895static int mail_out(Adapter * host, Scb * scbptr) 896/* 897 * Note: this can also be used for ICBs; just cast to the parm type. 898 */ 899{ 900 int i, ogmb; 901 unsigned long flags; 902 unchar start_ogmb; 903 Mailbox *ogmbs = host->mb.ogmb; 904 int *next_ogmb = &(host->next_ogmb); 905 906 dprintk("wd7000_mail_out: 0x%06lx", (long) scbptr); 907 908 /* We first look for a free outgoing mailbox */ 909 spin_lock_irqsave(host->sh->host_lock, flags); 910 ogmb = *next_ogmb; 911 for (i = 0; i < OGMB_CNT; i++) { 912 if (ogmbs[ogmb].status == 0) { 913 dprintk(" using OGMB 0x%x", ogmb); 914 ogmbs[ogmb].status = 1; 915 any2scsi((unchar *) ogmbs[ogmb].scbptr, (int) scbptr); 916 917 *next_ogmb = (ogmb + 1) % OGMB_CNT; 918 break; 919 } else 920 ogmb = (ogmb + 1) % OGMB_CNT; 921 } 922 spin_unlock_irqrestore(host->sh->host_lock, flags); 923 924 dprintk(", scb is 0x%06lx", (long) scbptr); 925 926 if (i >= OGMB_CNT) { 927 /* 928 * Alternatively, we might issue the "interrupt on free OGMB", 929 * and sleep, but it must be ensured that it isn't the init 930 * task running. Instead, this version assumes that the caller 931 * will be persistent, and try again. Since it's the adapter 932 * that marks OGMB's free, waiting even with interrupts off 933 * should work, since they are freed very quickly in most cases. 934 */ 935 dprintk(", no free OGMBs.\n"); 936 return (0); 937 } 938 939 wd7000_enable_intr(host); 940 941 start_ogmb = START_OGMB | ogmb; 942 command_out(host, &start_ogmb, 1); 943 944 dprintk(", awaiting interrupt.\n"); 945 946 return (1); 947} 948 949 950static int make_code(unsigned hosterr, unsigned scsierr) 951{ 952#ifdef WD7000_DEBUG 953 int in_error = hosterr; 954#endif 955 956 switch ((hosterr >> 8) & 0xff) { 957 case 0: /* Reserved */ 958 hosterr = DID_ERROR; 959 break; 960 case 1: /* Command Complete, no errors */ 961 hosterr = DID_OK; 962 break; 963 case 2: /* Command complete, error logged in scb status (scsierr) */ 964 hosterr = DID_OK; 965 break; 966 case 4: /* Command failed to complete - timeout */ 967 hosterr = DID_TIME_OUT; 968 break; 969 case 5: /* Command terminated; Bus reset by external device */ 970 hosterr = DID_RESET; 971 break; 972 case 6: /* Unexpected Command Received w/ host as target */ 973 hosterr = DID_BAD_TARGET; 974 break; 975 case 80: /* Unexpected Reselection */ 976 case 81: /* Unexpected Selection */ 977 hosterr = DID_BAD_INTR; 978 break; 979 case 82: /* Abort Command Message */ 980 hosterr = DID_ABORT; 981 break; 982 case 83: /* SCSI Bus Software Reset */ 983 case 84: /* SCSI Bus Hardware Reset */ 984 hosterr = DID_RESET; 985 break; 986 default: /* Reserved */ 987 hosterr = DID_ERROR; 988 } 989#ifdef WD7000_DEBUG 990 if (scsierr || hosterr) 991 dprintk("\nSCSI command error: SCSI 0x%02x host 0x%04x return %d\n", scsierr, in_error, hosterr); 992#endif 993 return (scsierr | (hosterr << 16)); 994} 995 996#define wd7000_intr_ack(host) outb (0, host->iobase + ASC_INTR_ACK) 997 998 999static irqreturn_t wd7000_intr(int irq, void *dev_id) 1000{ 1001 Adapter *host = (Adapter *) dev_id; 1002 int flag, icmb, errstatus, icmb_status; 1003 int host_error, scsi_error; 1004 Scb *scb; /* for SCSI commands */ 1005 IcbAny *icb; /* for host commands */ 1006 struct scsi_cmnd *SCpnt; 1007 Mailbox *icmbs = host->mb.icmb; 1008 unsigned long flags; 1009 1010 spin_lock_irqsave(host->sh->host_lock, flags); 1011 host->int_counter++; 1012 1013 dprintk("wd7000_intr: irq = %d, host = 0x%06lx\n", irq, (long) host); 1014 1015 flag = inb(host->iobase + ASC_INTR_STAT); 1016 1017 dprintk("wd7000_intr: intr stat = 0x%02x\n", flag); 1018 1019 if (!(inb(host->iobase + ASC_STAT) & INT_IM)) { 1020 /* NB: these are _very_ possible if IRQ 15 is being used, since 1021 * it's the "garbage collector" on the 2nd 8259 PIC. Specifically, 1022 * any interrupt signal into the 8259 which can't be identified 1023 * comes out as 7 from the 8259, which is 15 to the host. Thus, it 1024 * is a good thing the WD7000 has an interrupt status port, so we 1025 * can sort these out. Otherwise, electrical noise and other such 1026 * problems would be indistinguishable from valid interrupts... 1027 */ 1028 dprintk("wd7000_intr: phantom interrupt...\n"); 1029 goto ack; 1030 } 1031 1032 if (!(flag & MB_INTR)) 1033 goto ack; 1034 1035 /* The interrupt is for a mailbox */ 1036 if (!(flag & IMB_INTR)) { 1037 dprintk("wd7000_intr: free outgoing mailbox\n"); 1038 /* 1039 * If sleep_on() and the "interrupt on free OGMB" command are 1040 * used in mail_out(), wake_up() should correspondingly be called 1041 * here. For now, we don't need to do anything special. 1042 */ 1043 goto ack; 1044 } 1045 1046 /* The interrupt is for an incoming mailbox */ 1047 icmb = flag & MB_MASK; 1048 icmb_status = icmbs[icmb].status; 1049 if (icmb_status & 0x80) { /* unsolicited - result in ICMB */ 1050 dprintk("wd7000_intr: unsolicited interrupt 0x%02x\n", icmb_status); 1051 goto ack; 1052 } 1053 1054 /* Aaaargh! (Zaga) */ 1055 scb = isa_bus_to_virt(scsi2int((unchar *) icmbs[icmb].scbptr)); 1056 icmbs[icmb].status = 0; 1057 if (scb->op & ICB_OP_MASK) { /* an SCB is done */ 1058 icb = (IcbAny *) scb; 1059 icb->status = icmb_status; 1060 icb->phase = 0; 1061 goto ack; 1062 } 1063 1064 SCpnt = scb->SCpnt; 1065 if (--(SCpnt->SCp.phase) <= 0) { /* all scbs are done */ 1066 host_error = scb->vue | (icmb_status << 8); 1067 scsi_error = scb->status; 1068 errstatus = make_code(host_error, scsi_error); 1069 SCpnt->result = errstatus; 1070 1071 free_scb(scb); 1072 1073 SCpnt->scsi_done(SCpnt); 1074 } 1075 1076 ack: 1077 dprintk("wd7000_intr: return from interrupt handler\n"); 1078 wd7000_intr_ack(host); 1079 1080 spin_unlock_irqrestore(host->sh->host_lock, flags); 1081 return IRQ_HANDLED; 1082} 1083 1084static int wd7000_queuecommand_lck(struct scsi_cmnd *SCpnt, 1085 void (*done)(struct scsi_cmnd *)) 1086{ 1087 Scb *scb; 1088 Sgb *sgb; 1089 unchar *cdb = (unchar *) SCpnt->cmnd; 1090 unchar idlun; 1091 short cdblen; 1092 int nseg; 1093 Adapter *host = (Adapter *) SCpnt->device->host->hostdata; 1094 1095 cdblen = SCpnt->cmd_len; 1096 idlun = ((SCpnt->device->id << 5) & 0xe0) | (SCpnt->device->lun & 7); 1097 SCpnt->scsi_done = done; 1098 SCpnt->SCp.phase = 1; 1099 scb = alloc_scbs(SCpnt->device->host, 1); 1100 scb->idlun = idlun; 1101 memcpy(scb->cdb, cdb, cdblen); 1102 scb->direc = 0x40; /* Disable direction check */ 1103 1104 scb->SCpnt = SCpnt; /* so we can find stuff later */ 1105 SCpnt->host_scribble = (unchar *) scb; 1106 scb->host = host; 1107 1108 nseg = scsi_sg_count(SCpnt); 1109 if (nseg > 1) { 1110 struct scatterlist *sg; 1111 unsigned i; 1112 1113 dprintk("Using scatter/gather with %d elements.\n", nseg); 1114 1115 sgb = scb->sgb; 1116 scb->op = 1; 1117 any2scsi(scb->dataptr, (int) sgb); 1118 any2scsi(scb->maxlen, nseg * sizeof(Sgb)); 1119 1120 scsi_for_each_sg(SCpnt, sg, nseg, i) { 1121 any2scsi(sgb[i].ptr, isa_page_to_bus(sg_page(sg)) + sg->offset); 1122 any2scsi(sgb[i].len, sg->length); 1123 } 1124 } else { 1125 scb->op = 0; 1126 if (nseg) { 1127 struct scatterlist *sg = scsi_sglist(SCpnt); 1128 any2scsi(scb->dataptr, isa_page_to_bus(sg_page(sg)) + sg->offset); 1129 } 1130 any2scsi(scb->maxlen, scsi_bufflen(SCpnt)); 1131 } 1132 1133 /* FIXME: drop lock and yield here ? */ 1134 1135 while (!mail_out(host, scb)) 1136 cpu_relax(); /* keep trying */ 1137 1138 return 0; 1139} 1140 1141static DEF_SCSI_QCMD(wd7000_queuecommand) 1142 1143static int wd7000_diagnostics(Adapter * host, int code) 1144{ 1145 static IcbDiag icb = { ICB_OP_DIAGNOSTICS }; 1146 static unchar buf[256]; 1147 unsigned long timeout; 1148 1149 icb.type = code; 1150 any2scsi(icb.len, sizeof(buf)); 1151 any2scsi(icb.ptr, (int) &buf); 1152 icb.phase = 1; 1153 /* 1154 * This routine is only called at init, so there should be OGMBs 1155 * available. I'm assuming so here. If this is going to 1156 * fail, I can just let the timeout catch the failure. 1157 */ 1158 mail_out(host, (struct scb *) &icb); 1159 timeout = jiffies + WAITnexttimeout; /* wait up to 2 seconds */ 1160 while (icb.phase && time_before(jiffies, timeout)) { 1161 cpu_relax(); /* wait for completion */ 1162 barrier(); 1163 } 1164 1165 if (icb.phase) { 1166 printk("wd7000_diagnostics: timed out.\n"); 1167 return (0); 1168 } 1169 if (make_code(icb.vue | (icb.status << 8), 0)) { 1170 printk("wd7000_diagnostics: failed (0x%02x,0x%02x)\n", icb.vue, icb.status); 1171 return (0); 1172 } 1173 1174 return (1); 1175} 1176 1177 1178static int wd7000_adapter_reset(Adapter * host) 1179{ 1180 InitCmd init_cmd = { 1181 INITIALIZATION, 1182 7, 1183 host->bus_on, 1184 host->bus_off, 1185 0, 1186 {0, 0, 0}, 1187 OGMB_CNT, 1188 ICMB_CNT 1189 }; 1190 int diag; 1191 /* 1192 * Reset the adapter - only. The SCSI bus was initialized at power-up, 1193 * and we need to do this just so we control the mailboxes, etc. 1194 */ 1195 outb(ASC_RES, host->iobase + ASC_CONTROL); 1196 udelay(40); /* reset pulse: this is 40us, only need 25us */ 1197 outb(0, host->iobase + ASC_CONTROL); 1198 host->control = 0; /* this must always shadow ASC_CONTROL */ 1199 1200 if (WAIT(host->iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) { 1201 printk(KERN_ERR "wd7000_init: WAIT timed out.\n"); 1202 return -1; /* -1 = not ok */ 1203 } 1204 1205 if ((diag = inb(host->iobase + ASC_INTR_STAT)) != 1) { 1206 printk("wd7000_init: "); 1207 1208 switch (diag) { 1209 case 2: 1210 printk(KERN_ERR "RAM failure.\n"); 1211 break; 1212 case 3: 1213 printk(KERN_ERR "FIFO R/W failed\n"); 1214 break; 1215 case 4: 1216 printk(KERN_ERR "SBIC register R/W failed\n"); 1217 break; 1218 case 5: 1219 printk(KERN_ERR "Initialization D-FF failed.\n"); 1220 break; 1221 case 6: 1222 printk(KERN_ERR "Host IRQ D-FF failed.\n"); 1223 break; 1224 case 7: 1225 printk(KERN_ERR "ROM checksum error.\n"); 1226 break; 1227 default: 1228 printk(KERN_ERR "diagnostic code 0x%02Xh received.\n", diag); 1229 } 1230 return -1; 1231 } 1232 /* Clear mailboxes */ 1233 memset(&(host->mb), 0, sizeof(host->mb)); 1234 1235 /* Execute init command */ 1236 any2scsi((unchar *) & (init_cmd.mailboxes), (int) &(host->mb)); 1237 if (!command_out(host, (unchar *) & init_cmd, sizeof(init_cmd))) { 1238 printk(KERN_ERR "wd7000_adapter_reset: adapter initialization failed.\n"); 1239 return -1; 1240 } 1241 1242 if (WAIT(host->iobase + ASC_STAT, ASC_STATMASK, ASC_INIT, 0)) { 1243 printk("wd7000_adapter_reset: WAIT timed out.\n"); 1244 return -1; 1245 } 1246 return 0; 1247} 1248 1249static int wd7000_init(Adapter * host) 1250{ 1251 if (wd7000_adapter_reset(host) == -1) 1252 return 0; 1253 1254 1255 if (request_irq(host->irq, wd7000_intr, IRQF_DISABLED, "wd7000", host)) { 1256 printk("wd7000_init: can't get IRQ %d.\n", host->irq); 1257 return (0); 1258 } 1259 if (request_dma(host->dma, "wd7000")) { 1260 printk("wd7000_init: can't get DMA channel %d.\n", host->dma); 1261 free_irq(host->irq, host); 1262 return (0); 1263 } 1264 wd7000_enable_dma(host); 1265 wd7000_enable_intr(host); 1266 1267 if (!wd7000_diagnostics(host, ICB_DIAG_FULL)) { 1268 free_dma(host->dma); 1269 free_irq(host->irq, NULL); 1270 return (0); 1271 } 1272 1273 return (1); 1274} 1275 1276 1277static void wd7000_revision(Adapter * host) 1278{ 1279 static IcbRevLvl icb = { ICB_OP_GET_REVISION }; 1280 1281 icb.phase = 1; 1282 /* 1283 * Like diagnostics, this is only done at init time, in fact, from 1284 * wd7000_detect, so there should be OGMBs available. If it fails, 1285 * the only damage will be that the revision will show up as 0.0, 1286 * which in turn means that scatter/gather will be disabled. 1287 */ 1288 mail_out(host, (struct scb *) &icb); 1289 while (icb.phase) { 1290 cpu_relax(); /* wait for completion */ 1291 barrier(); 1292 } 1293 host->rev1 = icb.primary; 1294 host->rev2 = icb.secondary; 1295} 1296 1297 1298#undef SPRINTF 1299#define SPRINTF(args...) { if (pos < (buffer + length)) pos += sprintf (pos, ## args); } 1300 1301static int wd7000_set_info(char *buffer, int length, struct Scsi_Host *host) 1302{ 1303 dprintk("Buffer = <%.*s>, length = %d\n", length, buffer, length); 1304 1305 /* 1306 * Currently this is a no-op 1307 */ 1308 dprintk("Sorry, this function is currently out of order...\n"); 1309 return (length); 1310} 1311 1312 1313static int wd7000_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset, int length, int inout) 1314{ 1315 Adapter *adapter = (Adapter *)host->hostdata; 1316 unsigned long flags; 1317 char *pos = buffer; 1318#ifdef WD7000_DEBUG 1319 Mailbox *ogmbs, *icmbs; 1320 short count; 1321#endif 1322 1323 /* 1324 * Has data been written to the file ? 1325 */ 1326 if (inout) 1327 return (wd7000_set_info(buffer, length, host)); 1328 1329 spin_lock_irqsave(host->host_lock, flags); 1330 SPRINTF("Host scsi%d: Western Digital WD-7000 (rev %d.%d)\n", host->host_no, adapter->rev1, adapter->rev2); 1331 SPRINTF(" IO base: 0x%x\n", adapter->iobase); 1332 SPRINTF(" IRQ: %d\n", adapter->irq); 1333 SPRINTF(" DMA channel: %d\n", adapter->dma); 1334 SPRINTF(" Interrupts: %d\n", adapter->int_counter); 1335 SPRINTF(" BUS_ON time: %d nanoseconds\n", adapter->bus_on * 125); 1336 SPRINTF(" BUS_OFF time: %d nanoseconds\n", adapter->bus_off * 125); 1337 1338#ifdef WD7000_DEBUG 1339 ogmbs = adapter->mb.ogmb; 1340 icmbs = adapter->mb.icmb; 1341 1342 SPRINTF("\nControl port value: 0x%x\n", adapter->control); 1343 SPRINTF("Incoming mailbox:\n"); 1344 SPRINTF(" size: %d\n", ICMB_CNT); 1345 SPRINTF(" queued messages: "); 1346 1347 for (i = count = 0; i < ICMB_CNT; i++) 1348 if (icmbs[i].status) { 1349 count++; 1350 SPRINTF("0x%x ", i); 1351 } 1352 1353 SPRINTF(count ? "\n" : "none\n"); 1354 1355 SPRINTF("Outgoing mailbox:\n"); 1356 SPRINTF(" size: %d\n", OGMB_CNT); 1357 SPRINTF(" next message: 0x%x\n", adapter->next_ogmb); 1358 SPRINTF(" queued messages: "); 1359 1360 for (i = count = 0; i < OGMB_CNT; i++) 1361 if (ogmbs[i].status) { 1362 count++; 1363 SPRINTF("0x%x ", i); 1364 } 1365 1366 SPRINTF(count ? "\n" : "none\n"); 1367#endif 1368 1369 spin_unlock_irqrestore(host->host_lock, flags); 1370 1371 /* 1372 * Calculate start of next buffer, and return value. 1373 */ 1374 *start = buffer + offset; 1375 1376 if ((pos - buffer) < offset) 1377 return (0); 1378 else if ((pos - buffer - offset) < length) 1379 return (pos - buffer - offset); 1380 else 1381 return (length); 1382} 1383 1384 1385/* 1386 * Returns the number of adapters this driver is supporting. 1387 * 1388 * The source for hosts.c says to wait to call scsi_register until 100% 1389 * sure about an adapter. We need to do it a little sooner here; we 1390 * need the storage set up by scsi_register before wd7000_init, and 1391 * changing the location of an Adapter structure is more trouble than 1392 * calling scsi_unregister. 1393 * 1394 */ 1395 1396static __init int wd7000_detect(struct scsi_host_template *tpnt) 1397{ 1398 short present = 0, biosaddr_ptr, sig_ptr, i, pass; 1399 short biosptr[NUM_CONFIGS]; 1400 unsigned iobase; 1401 Adapter *host = NULL; 1402 struct Scsi_Host *sh; 1403 int unit = 0; 1404 1405 dprintk("wd7000_detect: started\n"); 1406 1407#ifdef MODULE 1408 if (wd7000) 1409 wd7000_setup(wd7000); 1410#endif 1411 1412 for (i = 0; i < UNITS; wd7000_host[i++] = NULL); 1413 for (i = 0; i < NUM_CONFIGS; biosptr[i++] = -1); 1414 1415 tpnt->proc_name = "wd7000"; 1416 tpnt->proc_info = &wd7000_proc_info; 1417 1418 /* 1419 * Set up SCB free list, which is shared by all adapters 1420 */ 1421 init_scbs(); 1422 1423 for (pass = 0; pass < NUM_CONFIGS; pass++) { 1424 /* 1425 * First, search for BIOS SIGNATURE... 1426 */ 1427 for (biosaddr_ptr = 0; biosaddr_ptr < NUM_ADDRS; biosaddr_ptr++) 1428 for (sig_ptr = 0; sig_ptr < NUM_SIGNATURES; sig_ptr++) { 1429 for (i = 0; i < pass; i++) 1430 if (biosptr[i] == biosaddr_ptr) 1431 break; 1432 1433 if (i == pass) { 1434 void __iomem *biosaddr = ioremap(wd7000_biosaddr[biosaddr_ptr] + signatures[sig_ptr].ofs, 1435 signatures[sig_ptr].len); 1436 short bios_match = 1; 1437 1438 if (biosaddr) 1439 bios_match = check_signature(biosaddr, signatures[sig_ptr].sig, signatures[sig_ptr].len); 1440 1441 iounmap(biosaddr); 1442 1443 if (bios_match) 1444 goto bios_matched; 1445 } 1446 } 1447 1448 bios_matched: 1449 /* 1450 * BIOS SIGNATURE has been found. 1451 */ 1452#ifdef WD7000_DEBUG 1453 dprintk("wd7000_detect: pass %d\n", pass + 1); 1454 1455 if (biosaddr_ptr == NUM_ADDRS) 1456 dprintk("WD-7000 SST BIOS not detected...\n"); 1457 else 1458 dprintk("WD-7000 SST BIOS detected at 0x%lx: checking...\n", wd7000_biosaddr[biosaddr_ptr]); 1459#endif 1460 1461 if (configs[pass].irq < 0) 1462 continue; 1463 1464 if (unit == UNITS) 1465 continue; 1466 1467 iobase = configs[pass].iobase; 1468 1469 dprintk("wd7000_detect: check IO 0x%x region...\n", iobase); 1470 1471 if (request_region(iobase, 4, "wd7000")) { 1472 1473 dprintk("wd7000_detect: ASC reset (IO 0x%x) ...", iobase); 1474 /* 1475 * ASC reset... 1476 */ 1477 outb(ASC_RES, iobase + ASC_CONTROL); 1478 msleep(10); 1479 outb(0, iobase + ASC_CONTROL); 1480 1481 if (WAIT(iobase + ASC_STAT, ASC_STATMASK, CMD_RDY, 0)) { 1482 dprintk("failed!\n"); 1483 goto err_release; 1484 } else 1485 dprintk("ok!\n"); 1486 1487 if (inb(iobase + ASC_INTR_STAT) == 1) { 1488 /* 1489 * We register here, to get a pointer to the extra space, 1490 * which we'll use as the Adapter structure (host) for 1491 * this adapter. It is located just after the registered 1492 * Scsi_Host structure (sh), and is located by the empty 1493 * array hostdata. 1494 */ 1495 sh = scsi_register(tpnt, sizeof(Adapter)); 1496 if (sh == NULL) 1497 goto err_release; 1498 1499 host = (Adapter *) sh->hostdata; 1500 1501 dprintk("wd7000_detect: adapter allocated at 0x%x\n", (int) host); 1502 memset(host, 0, sizeof(Adapter)); 1503 1504 host->irq = configs[pass].irq; 1505 host->dma = configs[pass].dma; 1506 host->iobase = iobase; 1507 host->int_counter = 0; 1508 host->bus_on = configs[pass].bus_on; 1509 host->bus_off = configs[pass].bus_off; 1510 host->sh = wd7000_host[unit] = sh; 1511 unit++; 1512 1513 dprintk("wd7000_detect: Trying init WD-7000 card at IO " "0x%x, IRQ %d, DMA %d...\n", host->iobase, host->irq, host->dma); 1514 1515 if (!wd7000_init(host)) /* Initialization failed */ 1516 goto err_unregister; 1517 1518 /* 1519 * OK from here - we'll use this adapter/configuration. 1520 */ 1521 wd7000_revision(host); /* important for scatter/gather */ 1522 1523 /* 1524 * For boards before rev 6.0, scatter/gather isn't supported. 1525 */ 1526 if (host->rev1 < 6) 1527 sh->sg_tablesize = 1; 1528 1529 present++; /* count it */ 1530 1531 if (biosaddr_ptr != NUM_ADDRS) 1532 biosptr[pass] = biosaddr_ptr; 1533 1534 printk(KERN_INFO "Western Digital WD-7000 (rev %d.%d) ", host->rev1, host->rev2); 1535 printk("using IO 0x%x, IRQ %d, DMA %d.\n", host->iobase, host->irq, host->dma); 1536 printk(" BUS_ON time: %dns, BUS_OFF time: %dns\n", host->bus_on * 125, host->bus_off * 125); 1537 } 1538 } else 1539 dprintk("wd7000_detect: IO 0x%x region already allocated!\n", iobase); 1540 1541 continue; 1542 1543 err_unregister: 1544 scsi_unregister(sh); 1545 err_release: 1546 release_region(iobase, 4); 1547 1548 } 1549 1550 if (!present) 1551 printk("Failed initialization of WD-7000 SCSI card!\n"); 1552 1553 return (present); 1554} 1555 1556static int wd7000_release(struct Scsi_Host *shost) 1557{ 1558 if (shost->irq) 1559 free_irq(shost->irq, NULL); 1560 if (shost->io_port && shost->n_io_port) 1561 release_region(shost->io_port, shost->n_io_port); 1562 scsi_unregister(shost); 1563 return 0; 1564} 1565 1566#if 0 1567/* 1568 * I have absolutely NO idea how to do an abort with the WD7000... 1569 */ 1570static int wd7000_abort(Scsi_Cmnd * SCpnt) 1571{ 1572 Adapter *host = (Adapter *) SCpnt->device->host->hostdata; 1573 1574 if (inb(host->iobase + ASC_STAT) & INT_IM) { 1575 printk("wd7000_abort: lost interrupt\n"); 1576 wd7000_intr_handle(host->irq, NULL, NULL); 1577 return FAILED; 1578 } 1579 return FAILED; 1580} 1581#endif 1582 1583/* 1584 * Last resort. Reinitialize the board. 1585 */ 1586 1587static int wd7000_host_reset(struct scsi_cmnd *SCpnt) 1588{ 1589 Adapter *host = (Adapter *) SCpnt->device->host->hostdata; 1590 1591 spin_lock_irq(SCpnt->device->host->host_lock); 1592 1593 if (wd7000_adapter_reset(host) < 0) { 1594 spin_unlock_irq(SCpnt->device->host->host_lock); 1595 return FAILED; 1596 } 1597 1598 wd7000_enable_intr(host); 1599 1600 spin_unlock_irq(SCpnt->device->host->host_lock); 1601 return SUCCESS; 1602} 1603 1604/* 1605 * This was borrowed directly from aha1542.c. (Zaga) 1606 */ 1607 1608static int wd7000_biosparam(struct scsi_device *sdev, 1609 struct block_device *bdev, sector_t capacity, int *ip) 1610{ 1611 char b[BDEVNAME_SIZE]; 1612 1613 dprintk("wd7000_biosparam: dev=%s, size=%d, ", 1614 bdevname(bdev, b), capacity); 1615 (void)b; /* unused var warning? */ 1616 1617 /* 1618 * try default translation 1619 */ 1620 ip[0] = 64; 1621 ip[1] = 32; 1622 ip[2] = capacity >> 11; 1623 1624 /* 1625 * for disks >1GB do some guessing 1626 */ 1627 if (ip[2] >= 1024) { 1628 int info[3]; 1629 1630 /* 1631 * try to figure out the geometry from the partition table 1632 */ 1633 if ((scsicam_bios_param(bdev, capacity, info) < 0) || !(((info[0] == 64) && (info[1] == 32)) || ((info[0] == 255) && (info[1] == 63)))) { 1634 printk("wd7000_biosparam: unable to verify geometry for disk with >1GB.\n" " using extended translation.\n"); 1635 1636 ip[0] = 255; 1637 ip[1] = 63; 1638 ip[2] = (unsigned long) capacity / (255 * 63); 1639 } else { 1640 ip[0] = info[0]; 1641 ip[1] = info[1]; 1642 ip[2] = info[2]; 1643 1644 if (info[0] == 255) 1645 printk(KERN_INFO "%s: current partition table is " "using extended translation.\n", __func__); 1646 } 1647 } 1648 1649 dprintk("bios geometry: head=%d, sec=%d, cyl=%d\n", ip[0], ip[1], ip[2]); 1650 dprintk("WARNING: check, if the bios geometry is correct.\n"); 1651 1652 return (0); 1653} 1654 1655MODULE_AUTHOR("Thomas Wuensche, John Boyd, Miroslav Zagorac"); 1656MODULE_DESCRIPTION("Driver for the WD7000 series ISA controllers"); 1657MODULE_LICENSE("GPL"); 1658 1659static struct scsi_host_template driver_template = { 1660 .proc_name = "wd7000", 1661 .proc_info = wd7000_proc_info, 1662 .name = "Western Digital WD-7000", 1663 .detect = wd7000_detect, 1664 .release = wd7000_release, 1665 .queuecommand = wd7000_queuecommand, 1666 .eh_host_reset_handler = wd7000_host_reset, 1667 .bios_param = wd7000_biosparam, 1668 .can_queue = WD7000_Q, 1669 .this_id = 7, 1670 .sg_tablesize = WD7000_SG, 1671 .cmd_per_lun = 1, 1672 .unchecked_isa_dma = 1, 1673 .use_clustering = ENABLE_CLUSTERING, 1674}; 1675 1676#include "scsi_module.c" 1677