acornscsi.c revision 324b9337f246e5f00aad10220d8d4bc13f1922ed
1/* 2 * linux/drivers/acorn/scsi/acornscsi.c 3 * 4 * Acorn SCSI 3 driver 5 * By R.M.King. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 * 11 * Abandoned using the Select and Transfer command since there were 12 * some nasty races between our software and the target devices that 13 * were not easy to solve, and the device errata had a lot of entries 14 * for this command, some of them quite nasty... 15 * 16 * Changelog: 17 * 26-Sep-1997 RMK Re-jigged to use the queue module. 18 * Re-coded state machine to be based on driver 19 * state not scsi state. Should be easier to debug. 20 * Added acornscsi_release to clean up properly. 21 * Updated proc/scsi reporting. 22 * 05-Oct-1997 RMK Implemented writing to SCSI devices. 23 * 06-Oct-1997 RMK Corrected small (non-serious) bug with the connect/ 24 * reconnect race condition causing a warning message. 25 * 12-Oct-1997 RMK Added catch for re-entering interrupt routine. 26 * 15-Oct-1997 RMK Improved handling of commands. 27 * 27-Jun-1998 RMK Changed asm/delay.h to linux/delay.h. 28 * 13-Dec-1998 RMK Better abort code and command handling. Extra state 29 * transitions added to allow dodgy devices to work. 30 */ 31#define DEBUG_NO_WRITE 1 32#define DEBUG_QUEUES 2 33#define DEBUG_DMA 4 34#define DEBUG_ABORT 8 35#define DEBUG_DISCON 16 36#define DEBUG_CONNECT 32 37#define DEBUG_PHASES 64 38#define DEBUG_WRITE 128 39#define DEBUG_LINK 256 40#define DEBUG_MESSAGES 512 41#define DEBUG_RESET 1024 42#define DEBUG_ALL (DEBUG_RESET|DEBUG_MESSAGES|DEBUG_LINK|DEBUG_WRITE|\ 43 DEBUG_PHASES|DEBUG_CONNECT|DEBUG_DISCON|DEBUG_ABORT|\ 44 DEBUG_DMA|DEBUG_QUEUES) 45 46/* DRIVER CONFIGURATION 47 * 48 * SCSI-II Tagged queue support. 49 * 50 * I don't have any SCSI devices that support it, so it is totally untested 51 * (except to make sure that it doesn't interfere with any non-tagging 52 * devices). It is not fully implemented either - what happens when a 53 * tagging device reconnects??? 54 * 55 * You can tell if you have a device that supports tagged queueing my 56 * cating (eg) /proc/scsi/acornscsi/0 and see if the SCSI revision is reported 57 * as '2 TAG'. 58 * 59 * Also note that CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE is normally set in the config 60 * scripts, but disabled here. Once debugged, remove the #undef, otherwise to debug, 61 * comment out the undef. 62 */ 63#undef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 64/* 65 * SCSI-II Linked command support. 66 * 67 * The higher level code doesn't support linked commands yet, and so the option 68 * is undef'd here. 69 */ 70#undef CONFIG_SCSI_ACORNSCSI_LINK 71/* 72 * SCSI-II Synchronous transfer support. 73 * 74 * Tried and tested... 75 * 76 * SDTR_SIZE - maximum number of un-acknowledged bytes (0 = off, 12 = max) 77 * SDTR_PERIOD - period of REQ signal (min=125, max=1020) 78 * DEFAULT_PERIOD - default REQ period. 79 */ 80#define SDTR_SIZE 12 81#define SDTR_PERIOD 125 82#define DEFAULT_PERIOD 500 83 84/* 85 * Debugging information 86 * 87 * DEBUG - bit mask from list above 88 * DEBUG_TARGET - is defined to the target number if you want to debug 89 * a specific target. [only recon/write/dma]. 90 */ 91#define DEBUG (DEBUG_RESET|DEBUG_WRITE|DEBUG_NO_WRITE) 92/* only allow writing to SCSI device 0 */ 93#define NO_WRITE 0xFE 94/*#define DEBUG_TARGET 2*/ 95/* 96 * Select timeout time (in 10ms units) 97 * 98 * This is the timeout used between the start of selection and the WD33C93 99 * chip deciding that the device isn't responding. 100 */ 101#define TIMEOUT_TIME 10 102/* 103 * Define this if you want to have verbose explaination of SCSI 104 * status/messages. 105 */ 106#undef CONFIG_ACORNSCSI_CONSTANTS 107/* 108 * Define this if you want to use the on board DMAC [don't remove this option] 109 * If not set, then use PIO mode (not currently supported). 110 */ 111#define USE_DMAC 112 113/* 114 * ==================================================================================== 115 */ 116 117#ifdef DEBUG_TARGET 118#define DBG(cmd,xxx...) \ 119 if (cmd->device->id == DEBUG_TARGET) { \ 120 xxx; \ 121 } 122#else 123#define DBG(cmd,xxx...) xxx 124#endif 125 126#ifndef STRINGIFY 127#define STRINGIFY(x) #x 128#endif 129#define STRx(x) STRINGIFY(x) 130#define NO_WRITE_STR STRx(NO_WRITE) 131 132#include <linux/module.h> 133#include <linux/kernel.h> 134#include <linux/string.h> 135#include <linux/signal.h> 136#include <linux/errno.h> 137#include <linux/proc_fs.h> 138#include <linux/ioport.h> 139#include <linux/blkdev.h> 140#include <linux/delay.h> 141#include <linux/interrupt.h> 142#include <linux/init.h> 143#include <linux/bitops.h> 144 145#include <asm/system.h> 146#include <asm/io.h> 147#include <asm/ecard.h> 148 149#include "../scsi.h" 150#include <scsi/scsi_dbg.h> 151#include <scsi/scsi_host.h> 152#include <scsi/scsi_transport_spi.h> 153#include "acornscsi.h" 154#include "msgqueue.h" 155#include "scsi.h" 156 157#include <scsi/scsicam.h> 158 159#define VER_MAJOR 2 160#define VER_MINOR 0 161#define VER_PATCH 6 162 163#ifndef ABORT_TAG 164#define ABORT_TAG 0xd 165#else 166#error "Yippee! ABORT TAG is now defined! Remove this error!" 167#endif 168 169#ifdef CONFIG_SCSI_ACORNSCSI_LINK 170#error SCSI2 LINKed commands not supported (yet)! 171#endif 172 173#ifdef USE_DMAC 174/* 175 * DMAC setup parameters 176 */ 177#define INIT_DEVCON0 (DEVCON0_RQL|DEVCON0_EXW|DEVCON0_CMP) 178#define INIT_DEVCON1 (DEVCON1_BHLD) 179#define DMAC_READ (MODECON_READ) 180#define DMAC_WRITE (MODECON_WRITE) 181#define INIT_SBICDMA (CTRL_DMABURST) 182 183#define scsi_xferred have_data_in 184 185/* 186 * Size of on-board DMA buffer 187 */ 188#define DMAC_BUFFER_SIZE 65536 189#endif 190 191#define STATUS_BUFFER_TO_PRINT 24 192 193unsigned int sdtr_period = SDTR_PERIOD; 194unsigned int sdtr_size = SDTR_SIZE; 195 196static void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, 197 unsigned int result); 198static int acornscsi_reconnect_finish(AS_Host *host); 199static void acornscsi_dma_cleanup(AS_Host *host); 200static void acornscsi_abortcmd(AS_Host *host, unsigned char tag); 201 202/* ==================================================================================== 203 * Miscellaneous 204 */ 205 206static inline void 207sbic_arm_write(unsigned int io_port, int reg, int value) 208{ 209 __raw_writeb(reg, io_port); 210 __raw_writeb(value, io_port + 4); 211} 212 213#define sbic_arm_writenext(io,val) \ 214 __raw_writeb((val), (io) + 4) 215 216static inline 217int sbic_arm_read(unsigned int io_port, int reg) 218{ 219 if(reg == SBIC_ASR) 220 return __raw_readl(io_port) & 255; 221 __raw_writeb(reg, io_port); 222 return __raw_readl(io_port + 4) & 255; 223} 224 225#define sbic_arm_readnext(io) \ 226 __raw_readb((io) + 4) 227 228#ifdef USE_DMAC 229#define dmac_read(io_port,reg) \ 230 inb((io_port) + (reg)) 231 232#define dmac_write(io_port,reg,value) \ 233 ({ outb((value), (io_port) + (reg)); }) 234 235#define dmac_clearintr(io_port) \ 236 ({ outb(0, (io_port)); }) 237 238static inline 239unsigned int dmac_address(unsigned int io_port) 240{ 241 return dmac_read(io_port, DMAC_TXADRHI) << 16 | 242 dmac_read(io_port, DMAC_TXADRMD) << 8 | 243 dmac_read(io_port, DMAC_TXADRLO); 244} 245 246static 247void acornscsi_dumpdma(AS_Host *host, char *where) 248{ 249 unsigned int mode, addr, len; 250 251 mode = dmac_read(host->dma.io_port, DMAC_MODECON); 252 addr = dmac_address(host->dma.io_port); 253 len = dmac_read(host->dma.io_port, DMAC_TXCNTHI) << 8 | 254 dmac_read(host->dma.io_port, DMAC_TXCNTLO); 255 256 printk("scsi%d: %s: DMAC %02x @%06x+%04x msk %02x, ", 257 host->host->host_no, where, 258 mode, addr, (len + 1) & 0xffff, 259 dmac_read(host->dma.io_port, DMAC_MASKREG)); 260 261 printk("DMA @%06x, ", host->dma.start_addr); 262 printk("BH @%p +%04x, ", host->scsi.SCp.ptr, 263 host->scsi.SCp.this_residual); 264 printk("DT @+%04x ST @+%04x", host->dma.transferred, 265 host->scsi.SCp.scsi_xferred); 266 printk("\n"); 267} 268#endif 269 270static 271unsigned long acornscsi_sbic_xfcount(AS_Host *host) 272{ 273 unsigned long length; 274 275 length = sbic_arm_read(host->scsi.io_port, SBIC_TRANSCNTH) << 16; 276 length |= sbic_arm_readnext(host->scsi.io_port) << 8; 277 length |= sbic_arm_readnext(host->scsi.io_port); 278 279 return length; 280} 281 282static int 283acornscsi_sbic_wait(AS_Host *host, int stat_mask, int stat, int timeout, char *msg) 284{ 285 int asr; 286 287 do { 288 asr = sbic_arm_read(host->scsi.io_port, SBIC_ASR); 289 290 if ((asr & stat_mask) == stat) 291 return 0; 292 293 udelay(1); 294 } while (--timeout); 295 296 printk("scsi%d: timeout while %s\n", host->host->host_no, msg); 297 298 return -1; 299} 300 301static 302int acornscsi_sbic_issuecmd(AS_Host *host, int command) 303{ 304 if (acornscsi_sbic_wait(host, ASR_CIP, 0, 1000, "issuing command")) 305 return -1; 306 307 sbic_arm_write(host->scsi.io_port, SBIC_CMND, command); 308 309 return 0; 310} 311 312static void 313acornscsi_csdelay(unsigned int cs) 314{ 315 unsigned long target_jiffies, flags; 316 317 target_jiffies = jiffies + 1 + cs * HZ / 100; 318 319 local_save_flags(flags); 320 local_irq_enable(); 321 322 while (time_before(jiffies, target_jiffies)) barrier(); 323 324 local_irq_restore(flags); 325} 326 327static 328void acornscsi_resetcard(AS_Host *host) 329{ 330 unsigned int i, timeout; 331 332 /* assert reset line */ 333 host->card.page_reg = 0x80; 334 outb(host->card.page_reg, host->card.io_page); 335 336 /* wait 3 cs. SCSI standard says 25ms. */ 337 acornscsi_csdelay(3); 338 339 host->card.page_reg = 0; 340 outb(host->card.page_reg, host->card.io_page); 341 342 /* 343 * Should get a reset from the card 344 */ 345 timeout = 1000; 346 do { 347 if (inb(host->card.io_intr) & 8) 348 break; 349 udelay(1); 350 } while (--timeout); 351 352 if (timeout == 0) 353 printk("scsi%d: timeout while resetting card\n", 354 host->host->host_no); 355 356 sbic_arm_read(host->scsi.io_port, SBIC_ASR); 357 sbic_arm_read(host->scsi.io_port, SBIC_SSR); 358 359 /* setup sbic - WD33C93A */ 360 sbic_arm_write(host->scsi.io_port, SBIC_OWNID, OWNID_EAF | host->host->this_id); 361 sbic_arm_write(host->scsi.io_port, SBIC_CMND, CMND_RESET); 362 363 /* 364 * Command should cause a reset interrupt 365 */ 366 timeout = 1000; 367 do { 368 if (inb(host->card.io_intr) & 8) 369 break; 370 udelay(1); 371 } while (--timeout); 372 373 if (timeout == 0) 374 printk("scsi%d: timeout while resetting card\n", 375 host->host->host_no); 376 377 sbic_arm_read(host->scsi.io_port, SBIC_ASR); 378 if (sbic_arm_read(host->scsi.io_port, SBIC_SSR) != 0x01) 379 printk(KERN_CRIT "scsi%d: WD33C93A didn't give enhanced reset interrupt\n", 380 host->host->host_no); 381 382 sbic_arm_write(host->scsi.io_port, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI); 383 sbic_arm_write(host->scsi.io_port, SBIC_TIMEOUT, TIMEOUT_TIME); 384 sbic_arm_write(host->scsi.io_port, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA); 385 sbic_arm_write(host->scsi.io_port, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP); 386 387 host->card.page_reg = 0x40; 388 outb(host->card.page_reg, host->card.io_page); 389 390 /* setup dmac - uPC71071 */ 391 dmac_write(host->dma.io_port, DMAC_INIT, 0); 392#ifdef USE_DMAC 393 dmac_write(host->dma.io_port, DMAC_INIT, INIT_8BIT); 394 dmac_write(host->dma.io_port, DMAC_CHANNEL, CHANNEL_0); 395 dmac_write(host->dma.io_port, DMAC_DEVCON0, INIT_DEVCON0); 396 dmac_write(host->dma.io_port, DMAC_DEVCON1, INIT_DEVCON1); 397#endif 398 399 host->SCpnt = NULL; 400 host->scsi.phase = PHASE_IDLE; 401 host->scsi.disconnectable = 0; 402 403 memset(host->busyluns, 0, sizeof(host->busyluns)); 404 405 for (i = 0; i < 8; i++) { 406 host->device[i].sync_state = SYNC_NEGOCIATE; 407 host->device[i].disconnect_ok = 1; 408 } 409 410 /* wait 25 cs. SCSI standard says 250ms. */ 411 acornscsi_csdelay(25); 412} 413 414/*============================================================================================= 415 * Utility routines (eg. debug) 416 */ 417#ifdef CONFIG_ACORNSCSI_CONSTANTS 418static char *acornscsi_interrupttype[] = { 419 "rst", "suc", "p/a", "3", 420 "term", "5", "6", "7", 421 "serv", "9", "a", "b", 422 "c", "d", "e", "f" 423}; 424 425static signed char acornscsi_map[] = { 426 0, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 427 -1, 2, -1, -1, -1, -1, 3, -1, 4, 5, 6, 7, 8, 9, 10, 11, 428 12, 13, 14, -1, -1, -1, -1, -1, 4, 5, 6, 7, 8, 9, 10, 11, 429 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 430 15, 16, 17, 18, 19, -1, -1, 20, 4, 5, 6, 7, 8, 9, 10, 11, 431 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 432 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 433 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 434 21, 22, -1, -1, -1, 23, -1, -1, 4, 5, 6, 7, 8, 9, 10, 11, 435 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 436 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 437 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 438 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 439 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 440 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 441 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 442}; 443 444static char *acornscsi_interruptcode[] = { 445 /* 0 */ 446 "reset - normal mode", /* 00 */ 447 "reset - advanced mode", /* 01 */ 448 449 /* 2 */ 450 "sel", /* 11 */ 451 "sel+xfer", /* 16 */ 452 "data-out", /* 18 */ 453 "data-in", /* 19 */ 454 "cmd", /* 1A */ 455 "stat", /* 1B */ 456 "??-out", /* 1C */ 457 "??-in", /* 1D */ 458 "msg-out", /* 1E */ 459 "msg-in", /* 1F */ 460 461 /* 12 */ 462 "/ACK asserted", /* 20 */ 463 "save-data-ptr", /* 21 */ 464 "{re}sel", /* 22 */ 465 466 /* 15 */ 467 "inv cmd", /* 40 */ 468 "unexpected disconnect", /* 41 */ 469 "sel timeout", /* 42 */ 470 "P err", /* 43 */ 471 "P err+ATN", /* 44 */ 472 "bad status byte", /* 47 */ 473 474 /* 21 */ 475 "resel, no id", /* 80 */ 476 "resel", /* 81 */ 477 "discon", /* 85 */ 478}; 479 480static 481void print_scsi_status(unsigned int ssr) 482{ 483 if (acornscsi_map[ssr] != -1) 484 printk("%s:%s", 485 acornscsi_interrupttype[(ssr >> 4)], 486 acornscsi_interruptcode[acornscsi_map[ssr]]); 487 else 488 printk("%X:%X", ssr >> 4, ssr & 0x0f); 489} 490#endif 491 492static 493void print_sbic_status(int asr, int ssr, int cmdphase) 494{ 495#ifdef CONFIG_ACORNSCSI_CONSTANTS 496 printk("sbic: %c%c%c%c%c%c ", 497 asr & ASR_INT ? 'I' : 'i', 498 asr & ASR_LCI ? 'L' : 'l', 499 asr & ASR_BSY ? 'B' : 'b', 500 asr & ASR_CIP ? 'C' : 'c', 501 asr & ASR_PE ? 'P' : 'p', 502 asr & ASR_DBR ? 'D' : 'd'); 503 printk("scsi: "); 504 print_scsi_status(ssr); 505 printk(" ph %02X\n", cmdphase); 506#else 507 printk("sbic: %02X scsi: %X:%X ph: %02X\n", 508 asr, (ssr & 0xf0)>>4, ssr & 0x0f, cmdphase); 509#endif 510} 511 512static void 513acornscsi_dumplogline(AS_Host *host, int target, int line) 514{ 515 unsigned long prev; 516 signed int ptr; 517 518 ptr = host->status_ptr[target] - STATUS_BUFFER_TO_PRINT; 519 if (ptr < 0) 520 ptr += STATUS_BUFFER_SIZE; 521 522 printk("%c: %3s:", target == 8 ? 'H' : '0' + target, 523 line == 0 ? "ph" : line == 1 ? "ssr" : "int"); 524 525 prev = host->status[target][ptr].when; 526 527 for (; ptr != host->status_ptr[target]; ptr = (ptr + 1) & (STATUS_BUFFER_SIZE - 1)) { 528 unsigned long time_diff; 529 530 if (!host->status[target][ptr].when) 531 continue; 532 533 switch (line) { 534 case 0: 535 printk("%c%02X", host->status[target][ptr].irq ? '-' : ' ', 536 host->status[target][ptr].ph); 537 break; 538 539 case 1: 540 printk(" %02X", host->status[target][ptr].ssr); 541 break; 542 543 case 2: 544 time_diff = host->status[target][ptr].when - prev; 545 prev = host->status[target][ptr].when; 546 if (time_diff == 0) 547 printk("==^"); 548 else if (time_diff >= 100) 549 printk(" "); 550 else 551 printk(" %02ld", time_diff); 552 break; 553 } 554 } 555 556 printk("\n"); 557} 558 559static 560void acornscsi_dumplog(AS_Host *host, int target) 561{ 562 do { 563 acornscsi_dumplogline(host, target, 0); 564 acornscsi_dumplogline(host, target, 1); 565 acornscsi_dumplogline(host, target, 2); 566 567 if (target == 8) 568 break; 569 570 target = 8; 571 } while (1); 572} 573 574static 575char acornscsi_target(AS_Host *host) 576{ 577 if (host->SCpnt) 578 return '0' + host->SCpnt->device->id; 579 return 'H'; 580} 581 582/* 583 * Prototype: cmdtype_t acornscsi_cmdtype(int command) 584 * Purpose : differentiate READ from WRITE from other commands 585 * Params : command - command to interpret 586 * Returns : CMD_READ - command reads data, 587 * CMD_WRITE - command writes data, 588 * CMD_MISC - everything else 589 */ 590static inline 591cmdtype_t acornscsi_cmdtype(int command) 592{ 593 switch (command) { 594 case WRITE_6: case WRITE_10: case WRITE_12: 595 return CMD_WRITE; 596 case READ_6: case READ_10: case READ_12: 597 return CMD_READ; 598 default: 599 return CMD_MISC; 600 } 601} 602 603/* 604 * Prototype: int acornscsi_datadirection(int command) 605 * Purpose : differentiate between commands that have a DATA IN phase 606 * and a DATA OUT phase 607 * Params : command - command to interpret 608 * Returns : DATADIR_OUT - data out phase expected 609 * DATADIR_IN - data in phase expected 610 */ 611static 612datadir_t acornscsi_datadirection(int command) 613{ 614 switch (command) { 615 case CHANGE_DEFINITION: case COMPARE: case COPY: 616 case COPY_VERIFY: case LOG_SELECT: case MODE_SELECT: 617 case MODE_SELECT_10: case SEND_DIAGNOSTIC: case WRITE_BUFFER: 618 case FORMAT_UNIT: case REASSIGN_BLOCKS: case RESERVE: 619 case SEARCH_EQUAL: case SEARCH_HIGH: case SEARCH_LOW: 620 case WRITE_6: case WRITE_10: case WRITE_VERIFY: 621 case UPDATE_BLOCK: case WRITE_LONG: case WRITE_SAME: 622 case SEARCH_HIGH_12: case SEARCH_EQUAL_12: case SEARCH_LOW_12: 623 case WRITE_12: case WRITE_VERIFY_12: case SET_WINDOW: 624 case MEDIUM_SCAN: case SEND_VOLUME_TAG: case 0xea: 625 return DATADIR_OUT; 626 default: 627 return DATADIR_IN; 628 } 629} 630 631/* 632 * Purpose : provide values for synchronous transfers with 33C93. 633 * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting 634 * Modified by Russell King for 8MHz WD33C93A 635 */ 636static struct sync_xfer_tbl { 637 unsigned int period_ns; 638 unsigned char reg_value; 639} sync_xfer_table[] = { 640 { 1, 0x20 }, { 249, 0x20 }, { 374, 0x30 }, 641 { 499, 0x40 }, { 624, 0x50 }, { 749, 0x60 }, 642 { 874, 0x70 }, { 999, 0x00 }, { 0, 0 } 643}; 644 645/* 646 * Prototype: int acornscsi_getperiod(unsigned char syncxfer) 647 * Purpose : period for the synchronous transfer setting 648 * Params : syncxfer SYNCXFER register value 649 * Returns : period in ns. 650 */ 651static 652int acornscsi_getperiod(unsigned char syncxfer) 653{ 654 int i; 655 656 syncxfer &= 0xf0; 657 if (syncxfer == 0x10) 658 syncxfer = 0; 659 660 for (i = 1; sync_xfer_table[i].period_ns; i++) 661 if (syncxfer == sync_xfer_table[i].reg_value) 662 return sync_xfer_table[i].period_ns; 663 return 0; 664} 665 666/* 667 * Prototype: int round_period(unsigned int period) 668 * Purpose : return index into above table for a required REQ period 669 * Params : period - time (ns) for REQ 670 * Returns : table index 671 * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting 672 */ 673static inline 674int round_period(unsigned int period) 675{ 676 int i; 677 678 for (i = 1; sync_xfer_table[i].period_ns; i++) { 679 if ((period <= sync_xfer_table[i].period_ns) && 680 (period > sync_xfer_table[i - 1].period_ns)) 681 return i; 682 } 683 return 7; 684} 685 686/* 687 * Prototype: unsigned char calc_sync_xfer(unsigned int period, unsigned int offset) 688 * Purpose : calculate value for 33c93s SYNC register 689 * Params : period - time (ns) for REQ 690 * offset - offset in bytes between REQ/ACK 691 * Returns : value for SYNC register 692 * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting 693 */ 694static 695unsigned char calc_sync_xfer(unsigned int period, unsigned int offset) 696{ 697 return sync_xfer_table[round_period(period)].reg_value | 698 ((offset < SDTR_SIZE) ? offset : SDTR_SIZE); 699} 700 701/* ==================================================================================== 702 * Command functions 703 */ 704/* 705 * Function: acornscsi_kick(AS_Host *host) 706 * Purpose : kick next command to interface 707 * Params : host - host to send command to 708 * Returns : INTR_IDLE if idle, otherwise INTR_PROCESSING 709 * Notes : interrupts are always disabled! 710 */ 711static 712intr_ret_t acornscsi_kick(AS_Host *host) 713{ 714 int from_queue = 0; 715 struct scsi_cmnd *SCpnt; 716 717 /* first check to see if a command is waiting to be executed */ 718 SCpnt = host->origSCpnt; 719 host->origSCpnt = NULL; 720 721 /* retrieve next command */ 722 if (!SCpnt) { 723 SCpnt = queue_remove_exclude(&host->queues.issue, host->busyluns); 724 if (!SCpnt) 725 return INTR_IDLE; 726 727 from_queue = 1; 728 } 729 730 if (host->scsi.disconnectable && host->SCpnt) { 731 queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt); 732 host->scsi.disconnectable = 0; 733#if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 734 DBG(host->SCpnt, printk("scsi%d.%c: moved command to disconnected queue\n", 735 host->host->host_no, acornscsi_target(host))); 736#endif 737 host->SCpnt = NULL; 738 } 739 740 /* 741 * If we have an interrupt pending, then we may have been reselected. 742 * In this case, we don't want to write to the registers 743 */ 744 if (!(sbic_arm_read(host->scsi.io_port, SBIC_ASR) & (ASR_INT|ASR_BSY|ASR_CIP))) { 745 sbic_arm_write(host->scsi.io_port, SBIC_DESTID, SCpnt->device->id); 746 sbic_arm_write(host->scsi.io_port, SBIC_CMND, CMND_SELWITHATN); 747 } 748 749 /* 750 * claim host busy - all of these must happen atomically wrt 751 * our interrupt routine. Failure means command loss. 752 */ 753 host->scsi.phase = PHASE_CONNECTING; 754 host->SCpnt = SCpnt; 755 host->scsi.SCp = SCpnt->SCp; 756 host->dma.xfer_setup = 0; 757 host->dma.xfer_required = 0; 758 host->dma.xfer_done = 0; 759 760#if (DEBUG & (DEBUG_ABORT|DEBUG_CONNECT)) 761 DBG(SCpnt,printk("scsi%d.%c: starting cmd %02X\n", 762 host->host->host_no, '0' + SCpnt->device->id, 763 SCpnt->cmnd[0])); 764#endif 765 766 if (from_queue) { 767#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 768 /* 769 * tagged queueing - allocate a new tag to this command 770 */ 771 if (SCpnt->device->simple_tags) { 772 SCpnt->device->current_tag += 1; 773 if (SCpnt->device->current_tag == 0) 774 SCpnt->device->current_tag = 1; 775 SCpnt->tag = SCpnt->device->current_tag; 776 } else 777#endif 778 set_bit(SCpnt->device->id * 8 + SCpnt->device->lun, host->busyluns); 779 780 host->stats.removes += 1; 781 782 switch (acornscsi_cmdtype(SCpnt->cmnd[0])) { 783 case CMD_WRITE: 784 host->stats.writes += 1; 785 break; 786 case CMD_READ: 787 host->stats.reads += 1; 788 break; 789 case CMD_MISC: 790 host->stats.miscs += 1; 791 break; 792 } 793 } 794 795 return INTR_PROCESSING; 796} 797 798/* 799 * Function: void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, unsigned int result) 800 * Purpose : complete processing for command 801 * Params : host - interface that completed 802 * result - driver byte of result 803 */ 804static void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, 805 unsigned int result) 806{ 807 struct scsi_cmnd *SCpnt = *SCpntp; 808 809 /* clean up */ 810 sbic_arm_write(host->scsi.io_port, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP); 811 812 host->stats.fins += 1; 813 814 if (SCpnt) { 815 *SCpntp = NULL; 816 817 acornscsi_dma_cleanup(host); 818 819 SCpnt->result = result << 16 | host->scsi.SCp.Message << 8 | host->scsi.SCp.Status; 820 821 /* 822 * In theory, this should not happen. In practice, it seems to. 823 * Only trigger an error if the device attempts to report all happy 824 * but with untransferred buffers... If we don't do something, then 825 * data loss will occur. Should we check SCpnt->underflow here? 826 * It doesn't appear to be set to something meaningful by the higher 827 * levels all the time. 828 */ 829 if (result == DID_OK) { 830 int xfer_warn = 0; 831 832 if (SCpnt->underflow == 0) { 833 if (host->scsi.SCp.ptr && 834 acornscsi_cmdtype(SCpnt->cmnd[0]) != CMD_MISC) 835 xfer_warn = 1; 836 } else { 837 if (host->scsi.SCp.scsi_xferred < SCpnt->underflow || 838 host->scsi.SCp.scsi_xferred != host->dma.transferred) 839 xfer_warn = 1; 840 } 841 842 /* ANSI standard says: (SCSI-2 Rev 10c Sect 5.6.6) 843 * Targets which break data transfers into multiple 844 * connections shall end each successful connection 845 * (except possibly the last) with a SAVE DATA 846 * POINTER - DISCONNECT message sequence. 847 * 848 * This makes it difficult to ensure that a transfer has 849 * completed. If we reach the end of a transfer during 850 * the command, then we can only have finished the transfer. 851 * therefore, if we seem to have some data remaining, this 852 * is not a problem. 853 */ 854 if (host->dma.xfer_done) 855 xfer_warn = 0; 856 857 if (xfer_warn) { 858 switch (status_byte(SCpnt->result)) { 859 case CHECK_CONDITION: 860 case COMMAND_TERMINATED: 861 case BUSY: 862 case QUEUE_FULL: 863 case RESERVATION_CONFLICT: 864 break; 865 866 default: 867 printk(KERN_ERR "scsi%d.H: incomplete data transfer detected: result=%08X command=", 868 host->host->host_no, SCpnt->result); 869 __scsi_print_command(SCpnt->cmnd); 870 acornscsi_dumpdma(host, "done"); 871 acornscsi_dumplog(host, SCpnt->device->id); 872 SCpnt->result &= 0xffff; 873 SCpnt->result |= DID_ERROR << 16; 874 } 875 } 876 } 877 878 if (!SCpnt->scsi_done) 879 panic("scsi%d.H: null scsi_done function in acornscsi_done", host->host->host_no); 880 881 clear_bit(SCpnt->device->id * 8 + SCpnt->device->lun, host->busyluns); 882 883 SCpnt->scsi_done(SCpnt); 884 } else 885 printk("scsi%d: null command in acornscsi_done", host->host->host_no); 886 887 host->scsi.phase = PHASE_IDLE; 888} 889 890/* ==================================================================================== 891 * DMA routines 892 */ 893/* 894 * Purpose : update SCSI Data Pointer 895 * Notes : this will only be one SG entry or less 896 */ 897static 898void acornscsi_data_updateptr(AS_Host *host, struct scsi_pointer *SCp, unsigned int length) 899{ 900 SCp->ptr += length; 901 SCp->this_residual -= length; 902 903 if (SCp->this_residual == 0 && next_SCp(SCp) == 0) 904 host->dma.xfer_done = 1; 905} 906 907/* 908 * Prototype: void acornscsi_data_read(AS_Host *host, char *ptr, 909 * unsigned int start_addr, unsigned int length) 910 * Purpose : read data from DMA RAM 911 * Params : host - host to transfer from 912 * ptr - DRAM address 913 * start_addr - host mem address 914 * length - number of bytes to transfer 915 * Notes : this will only be one SG entry or less 916 */ 917static 918void acornscsi_data_read(AS_Host *host, char *ptr, 919 unsigned int start_addr, unsigned int length) 920{ 921 extern void __acornscsi_in(int port, char *buf, int len); 922 unsigned int page, offset, len = length; 923 924 page = (start_addr >> 12); 925 offset = start_addr & ((1 << 12) - 1); 926 927 outb((page & 0x3f) | host->card.page_reg, host->card.io_page); 928 929 while (len > 0) { 930 unsigned int this_len; 931 932 if (len + offset > (1 << 12)) 933 this_len = (1 << 12) - offset; 934 else 935 this_len = len; 936 937 __acornscsi_in(host->card.io_ram + (offset << 1), ptr, this_len); 938 939 offset += this_len; 940 ptr += this_len; 941 len -= this_len; 942 943 if (offset == (1 << 12)) { 944 offset = 0; 945 page ++; 946 outb((page & 0x3f) | host->card.page_reg, host->card.io_page); 947 } 948 } 949 outb(host->card.page_reg, host->card.io_page); 950} 951 952/* 953 * Prototype: void acornscsi_data_write(AS_Host *host, char *ptr, 954 * unsigned int start_addr, unsigned int length) 955 * Purpose : write data to DMA RAM 956 * Params : host - host to transfer from 957 * ptr - DRAM address 958 * start_addr - host mem address 959 * length - number of bytes to transfer 960 * Notes : this will only be one SG entry or less 961 */ 962static 963void acornscsi_data_write(AS_Host *host, char *ptr, 964 unsigned int start_addr, unsigned int length) 965{ 966 extern void __acornscsi_out(int port, char *buf, int len); 967 unsigned int page, offset, len = length; 968 969 page = (start_addr >> 12); 970 offset = start_addr & ((1 << 12) - 1); 971 972 outb((page & 0x3f) | host->card.page_reg, host->card.io_page); 973 974 while (len > 0) { 975 unsigned int this_len; 976 977 if (len + offset > (1 << 12)) 978 this_len = (1 << 12) - offset; 979 else 980 this_len = len; 981 982 __acornscsi_out(host->card.io_ram + (offset << 1), ptr, this_len); 983 984 offset += this_len; 985 ptr += this_len; 986 len -= this_len; 987 988 if (offset == (1 << 12)) { 989 offset = 0; 990 page ++; 991 outb((page & 0x3f) | host->card.page_reg, host->card.io_page); 992 } 993 } 994 outb(host->card.page_reg, host->card.io_page); 995} 996 997/* ========================================================================================= 998 * On-board DMA routines 999 */ 1000#ifdef USE_DMAC 1001/* 1002 * Prototype: void acornscsi_dmastop(AS_Host *host) 1003 * Purpose : stop all DMA 1004 * Params : host - host on which to stop DMA 1005 * Notes : This is called when leaving DATA IN/OUT phase, 1006 * or when interface is RESET 1007 */ 1008static inline 1009void acornscsi_dma_stop(AS_Host *host) 1010{ 1011 dmac_write(host->dma.io_port, DMAC_MASKREG, MASK_ON); 1012 dmac_clearintr(host->dma.io_intr_clear); 1013 1014#if (DEBUG & DEBUG_DMA) 1015 DBG(host->SCpnt, acornscsi_dumpdma(host, "stop")); 1016#endif 1017} 1018 1019/* 1020 * Function: void acornscsi_dma_setup(AS_Host *host, dmadir_t direction) 1021 * Purpose : setup DMA controller for data transfer 1022 * Params : host - host to setup 1023 * direction - data transfer direction 1024 * Notes : This is called when entering DATA I/O phase, not 1025 * while we're in a DATA I/O phase 1026 */ 1027static 1028void acornscsi_dma_setup(AS_Host *host, dmadir_t direction) 1029{ 1030 unsigned int address, length, mode; 1031 1032 host->dma.direction = direction; 1033 1034 dmac_write(host->dma.io_port, DMAC_MASKREG, MASK_ON); 1035 1036 if (direction == DMA_OUT) { 1037#if (DEBUG & DEBUG_NO_WRITE) 1038 if (NO_WRITE & (1 << host->SCpnt->device->id)) { 1039 printk(KERN_CRIT "scsi%d.%c: I can't handle DMA_OUT!\n", 1040 host->host->host_no, acornscsi_target(host)); 1041 return; 1042 } 1043#endif 1044 mode = DMAC_WRITE; 1045 } else 1046 mode = DMAC_READ; 1047 1048 /* 1049 * Allocate some buffer space, limited to half the buffer size 1050 */ 1051 length = min_t(unsigned int, host->scsi.SCp.this_residual, DMAC_BUFFER_SIZE / 2); 1052 if (length) { 1053 host->dma.start_addr = address = host->dma.free_addr; 1054 host->dma.free_addr = (host->dma.free_addr + length) & 1055 (DMAC_BUFFER_SIZE - 1); 1056 1057 /* 1058 * Transfer data to DMA memory 1059 */ 1060 if (direction == DMA_OUT) 1061 acornscsi_data_write(host, host->scsi.SCp.ptr, host->dma.start_addr, 1062 length); 1063 1064 length -= 1; 1065 dmac_write(host->dma.io_port, DMAC_TXCNTLO, length); 1066 dmac_write(host->dma.io_port, DMAC_TXCNTHI, length >> 8); 1067 dmac_write(host->dma.io_port, DMAC_TXADRLO, address); 1068 dmac_write(host->dma.io_port, DMAC_TXADRMD, address >> 8); 1069 dmac_write(host->dma.io_port, DMAC_TXADRHI, 0); 1070 dmac_write(host->dma.io_port, DMAC_MODECON, mode); 1071 dmac_write(host->dma.io_port, DMAC_MASKREG, MASK_OFF); 1072 1073#if (DEBUG & DEBUG_DMA) 1074 DBG(host->SCpnt, acornscsi_dumpdma(host, "strt")); 1075#endif 1076 host->dma.xfer_setup = 1; 1077 } 1078} 1079 1080/* 1081 * Function: void acornscsi_dma_cleanup(AS_Host *host) 1082 * Purpose : ensure that all DMA transfers are up-to-date & host->scsi.SCp is correct 1083 * Params : host - host to finish 1084 * Notes : This is called when a command is: 1085 * terminating, RESTORE_POINTERS, SAVE_POINTERS, DISCONECT 1086 * : This must not return until all transfers are completed. 1087 */ 1088static 1089void acornscsi_dma_cleanup(AS_Host *host) 1090{ 1091 dmac_write(host->dma.io_port, DMAC_MASKREG, MASK_ON); 1092 dmac_clearintr(host->dma.io_intr_clear); 1093 1094 /* 1095 * Check for a pending transfer 1096 */ 1097 if (host->dma.xfer_required) { 1098 host->dma.xfer_required = 0; 1099 if (host->dma.direction == DMA_IN) 1100 acornscsi_data_read(host, host->dma.xfer_ptr, 1101 host->dma.xfer_start, host->dma.xfer_length); 1102 } 1103 1104 /* 1105 * Has a transfer been setup? 1106 */ 1107 if (host->dma.xfer_setup) { 1108 unsigned int transferred; 1109 1110 host->dma.xfer_setup = 0; 1111 1112#if (DEBUG & DEBUG_DMA) 1113 DBG(host->SCpnt, acornscsi_dumpdma(host, "cupi")); 1114#endif 1115 1116 /* 1117 * Calculate number of bytes transferred from DMA. 1118 */ 1119 transferred = dmac_address(host->dma.io_port) - host->dma.start_addr; 1120 host->dma.transferred += transferred; 1121 1122 if (host->dma.direction == DMA_IN) 1123 acornscsi_data_read(host, host->scsi.SCp.ptr, 1124 host->dma.start_addr, transferred); 1125 1126 /* 1127 * Update SCSI pointers 1128 */ 1129 acornscsi_data_updateptr(host, &host->scsi.SCp, transferred); 1130#if (DEBUG & DEBUG_DMA) 1131 DBG(host->SCpnt, acornscsi_dumpdma(host, "cupo")); 1132#endif 1133 } 1134} 1135 1136/* 1137 * Function: void acornscsi_dmacintr(AS_Host *host) 1138 * Purpose : handle interrupts from DMAC device 1139 * Params : host - host to process 1140 * Notes : If reading, we schedule the read to main memory & 1141 * allow the transfer to continue. 1142 * : If writing, we fill the onboard DMA memory from main 1143 * memory. 1144 * : Called whenever DMAC finished it's current transfer. 1145 */ 1146static 1147void acornscsi_dma_intr(AS_Host *host) 1148{ 1149 unsigned int address, length, transferred; 1150 1151#if (DEBUG & DEBUG_DMA) 1152 DBG(host->SCpnt, acornscsi_dumpdma(host, "inti")); 1153#endif 1154 1155 dmac_write(host->dma.io_port, DMAC_MASKREG, MASK_ON); 1156 dmac_clearintr(host->dma.io_intr_clear); 1157 1158 /* 1159 * Calculate amount transferred via DMA 1160 */ 1161 transferred = dmac_address(host->dma.io_port) - host->dma.start_addr; 1162 host->dma.transferred += transferred; 1163 1164 /* 1165 * Schedule DMA transfer off board 1166 */ 1167 if (host->dma.direction == DMA_IN) { 1168 host->dma.xfer_start = host->dma.start_addr; 1169 host->dma.xfer_length = transferred; 1170 host->dma.xfer_ptr = host->scsi.SCp.ptr; 1171 host->dma.xfer_required = 1; 1172 } 1173 1174 acornscsi_data_updateptr(host, &host->scsi.SCp, transferred); 1175 1176 /* 1177 * Allocate some buffer space, limited to half the on-board RAM size 1178 */ 1179 length = min_t(unsigned int, host->scsi.SCp.this_residual, DMAC_BUFFER_SIZE / 2); 1180 if (length) { 1181 host->dma.start_addr = address = host->dma.free_addr; 1182 host->dma.free_addr = (host->dma.free_addr + length) & 1183 (DMAC_BUFFER_SIZE - 1); 1184 1185 /* 1186 * Transfer data to DMA memory 1187 */ 1188 if (host->dma.direction == DMA_OUT) 1189 acornscsi_data_write(host, host->scsi.SCp.ptr, host->dma.start_addr, 1190 length); 1191 1192 length -= 1; 1193 dmac_write(host->dma.io_port, DMAC_TXCNTLO, length); 1194 dmac_write(host->dma.io_port, DMAC_TXCNTHI, length >> 8); 1195 dmac_write(host->dma.io_port, DMAC_TXADRLO, address); 1196 dmac_write(host->dma.io_port, DMAC_TXADRMD, address >> 8); 1197 dmac_write(host->dma.io_port, DMAC_TXADRHI, 0); 1198 dmac_write(host->dma.io_port, DMAC_MASKREG, MASK_OFF); 1199 1200#if (DEBUG & DEBUG_DMA) 1201 DBG(host->SCpnt, acornscsi_dumpdma(host, "into")); 1202#endif 1203 } else { 1204 host->dma.xfer_setup = 0; 1205#if 0 1206 /* 1207 * If the interface still wants more, then this is an error. 1208 * We give it another byte, but we also attempt to raise an 1209 * attention condition. We continue giving one byte until 1210 * the device recognises the attention. 1211 */ 1212 if (dmac_read(host->dma.io_port, DMAC_STATUS) & STATUS_RQ0) { 1213 acornscsi_abortcmd(host, host->SCpnt->tag); 1214 1215 dmac_write(host->dma.io_port, DMAC_TXCNTLO, 0); 1216 dmac_write(host->dma.io_port, DMAC_TXCNTHI, 0); 1217 dmac_write(host->dma.io_port, DMAC_TXADRLO, 0); 1218 dmac_write(host->dma.io_port, DMAC_TXADRMD, 0); 1219 dmac_write(host->dma.io_port, DMAC_TXADRHI, 0); 1220 dmac_write(host->dma.io_port, DMAC_MASKREG, MASK_OFF); 1221 } 1222#endif 1223 } 1224} 1225 1226/* 1227 * Function: void acornscsi_dma_xfer(AS_Host *host) 1228 * Purpose : transfer data between AcornSCSI and memory 1229 * Params : host - host to process 1230 */ 1231static 1232void acornscsi_dma_xfer(AS_Host *host) 1233{ 1234 host->dma.xfer_required = 0; 1235 1236 if (host->dma.direction == DMA_IN) 1237 acornscsi_data_read(host, host->dma.xfer_ptr, 1238 host->dma.xfer_start, host->dma.xfer_length); 1239} 1240 1241/* 1242 * Function: void acornscsi_dma_adjust(AS_Host *host) 1243 * Purpose : adjust DMA pointers & count for bytes transferred to 1244 * SBIC but not SCSI bus. 1245 * Params : host - host to adjust DMA count for 1246 */ 1247static 1248void acornscsi_dma_adjust(AS_Host *host) 1249{ 1250 if (host->dma.xfer_setup) { 1251 signed long transferred; 1252#if (DEBUG & (DEBUG_DMA|DEBUG_WRITE)) 1253 DBG(host->SCpnt, acornscsi_dumpdma(host, "adji")); 1254#endif 1255 /* 1256 * Calculate correct DMA address - DMA is ahead of SCSI bus while 1257 * writing. 1258 * host->scsi.SCp.scsi_xferred is the number of bytes 1259 * actually transferred to/from the SCSI bus. 1260 * host->dma.transferred is the number of bytes transferred 1261 * over DMA since host->dma.start_addr was last set. 1262 * 1263 * real_dma_addr = host->dma.start_addr + host->scsi.SCp.scsi_xferred 1264 * - host->dma.transferred 1265 */ 1266 transferred = host->scsi.SCp.scsi_xferred - host->dma.transferred; 1267 if (transferred < 0) 1268 printk("scsi%d.%c: Ack! DMA write correction %ld < 0!\n", 1269 host->host->host_no, acornscsi_target(host), transferred); 1270 else if (transferred == 0) 1271 host->dma.xfer_setup = 0; 1272 else { 1273 transferred += host->dma.start_addr; 1274 dmac_write(host->dma.io_port, DMAC_TXADRLO, transferred); 1275 dmac_write(host->dma.io_port, DMAC_TXADRMD, transferred >> 8); 1276 dmac_write(host->dma.io_port, DMAC_TXADRHI, transferred >> 16); 1277#if (DEBUG & (DEBUG_DMA|DEBUG_WRITE)) 1278 DBG(host->SCpnt, acornscsi_dumpdma(host, "adjo")); 1279#endif 1280 } 1281 } 1282} 1283#endif 1284 1285/* ========================================================================================= 1286 * Data I/O 1287 */ 1288static int 1289acornscsi_write_pio(AS_Host *host, char *bytes, int *ptr, int len, unsigned int max_timeout) 1290{ 1291 unsigned int asr, timeout = max_timeout; 1292 int my_ptr = *ptr; 1293 1294 while (my_ptr < len) { 1295 asr = sbic_arm_read(host->scsi.io_port, SBIC_ASR); 1296 1297 if (asr & ASR_DBR) { 1298 timeout = max_timeout; 1299 1300 sbic_arm_write(host->scsi.io_port, SBIC_DATA, bytes[my_ptr++]); 1301 } else if (asr & ASR_INT) 1302 break; 1303 else if (--timeout == 0) 1304 break; 1305 udelay(1); 1306 } 1307 1308 *ptr = my_ptr; 1309 1310 return (timeout == 0) ? -1 : 0; 1311} 1312 1313/* 1314 * Function: void acornscsi_sendcommand(AS_Host *host) 1315 * Purpose : send a command to a target 1316 * Params : host - host which is connected to target 1317 */ 1318static void 1319acornscsi_sendcommand(AS_Host *host) 1320{ 1321 struct scsi_cmnd *SCpnt = host->SCpnt; 1322 1323 sbic_arm_write(host->scsi.io_port, SBIC_TRANSCNTH, 0); 1324 sbic_arm_writenext(host->scsi.io_port, 0); 1325 sbic_arm_writenext(host->scsi.io_port, SCpnt->cmd_len - host->scsi.SCp.sent_command); 1326 1327 acornscsi_sbic_issuecmd(host, CMND_XFERINFO); 1328 1329 if (acornscsi_write_pio(host, SCpnt->cmnd, 1330 (int *)&host->scsi.SCp.sent_command, SCpnt->cmd_len, 1000000)) 1331 printk("scsi%d: timeout while sending command\n", host->host->host_no); 1332 1333 host->scsi.phase = PHASE_COMMAND; 1334} 1335 1336static 1337void acornscsi_sendmessage(AS_Host *host) 1338{ 1339 unsigned int message_length = msgqueue_msglength(&host->scsi.msgs); 1340 unsigned int msgnr; 1341 struct message *msg; 1342 1343#if (DEBUG & DEBUG_MESSAGES) 1344 printk("scsi%d.%c: sending message ", 1345 host->host->host_no, acornscsi_target(host)); 1346#endif 1347 1348 switch (message_length) { 1349 case 0: 1350 acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT); 1351 1352 acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "sending message 1"); 1353 1354 sbic_arm_write(host->scsi.io_port, SBIC_DATA, NOP); 1355 1356 host->scsi.last_message = NOP; 1357#if (DEBUG & DEBUG_MESSAGES) 1358 printk("NOP"); 1359#endif 1360 break; 1361 1362 case 1: 1363 acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT); 1364 msg = msgqueue_getmsg(&host->scsi.msgs, 0); 1365 1366 acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "sending message 2"); 1367 1368 sbic_arm_write(host->scsi.io_port, SBIC_DATA, msg->msg[0]); 1369 1370 host->scsi.last_message = msg->msg[0]; 1371#if (DEBUG & DEBUG_MESSAGES) 1372 spi_print_msg(msg->msg); 1373#endif 1374 break; 1375 1376 default: 1377 /* 1378 * ANSI standard says: (SCSI-2 Rev 10c Sect 5.6.14) 1379 * 'When a target sends this (MESSAGE_REJECT) message, it 1380 * shall change to MESSAGE IN phase and send this message 1381 * prior to requesting additional message bytes from the 1382 * initiator. This provides an interlock so that the 1383 * initiator can determine which message byte is rejected. 1384 */ 1385 sbic_arm_write(host->scsi.io_port, SBIC_TRANSCNTH, 0); 1386 sbic_arm_writenext(host->scsi.io_port, 0); 1387 sbic_arm_writenext(host->scsi.io_port, message_length); 1388 acornscsi_sbic_issuecmd(host, CMND_XFERINFO); 1389 1390 msgnr = 0; 1391 while ((msg = msgqueue_getmsg(&host->scsi.msgs, msgnr++)) != NULL) { 1392 unsigned int i; 1393#if (DEBUG & DEBUG_MESSAGES) 1394 spi_print_msg(msg); 1395#endif 1396 i = 0; 1397 if (acornscsi_write_pio(host, msg->msg, &i, msg->length, 1000000)) 1398 printk("scsi%d: timeout while sending message\n", host->host->host_no); 1399 1400 host->scsi.last_message = msg->msg[0]; 1401 if (msg->msg[0] == EXTENDED_MESSAGE) 1402 host->scsi.last_message |= msg->msg[2] << 8; 1403 1404 if (i != msg->length) 1405 break; 1406 } 1407 break; 1408 } 1409#if (DEBUG & DEBUG_MESSAGES) 1410 printk("\n"); 1411#endif 1412} 1413 1414/* 1415 * Function: void acornscsi_readstatusbyte(AS_Host *host) 1416 * Purpose : Read status byte from connected target 1417 * Params : host - host connected to target 1418 */ 1419static 1420void acornscsi_readstatusbyte(AS_Host *host) 1421{ 1422 acornscsi_sbic_issuecmd(host, CMND_XFERINFO|CMND_SBT); 1423 acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "reading status byte"); 1424 host->scsi.SCp.Status = sbic_arm_read(host->scsi.io_port, SBIC_DATA); 1425} 1426 1427/* 1428 * Function: unsigned char acornscsi_readmessagebyte(AS_Host *host) 1429 * Purpose : Read one message byte from connected target 1430 * Params : host - host connected to target 1431 */ 1432static 1433unsigned char acornscsi_readmessagebyte(AS_Host *host) 1434{ 1435 unsigned char message; 1436 1437 acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT); 1438 1439 acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "for message byte"); 1440 1441 message = sbic_arm_read(host->scsi.io_port, SBIC_DATA); 1442 1443 /* wait for MSGIN-XFER-PAUSED */ 1444 acornscsi_sbic_wait(host, ASR_INT, ASR_INT, 1000, "for interrupt after message byte"); 1445 1446 sbic_arm_read(host->scsi.io_port, SBIC_SSR); 1447 1448 return message; 1449} 1450 1451/* 1452 * Function: void acornscsi_message(AS_Host *host) 1453 * Purpose : Read complete message from connected target & action message 1454 * Params : host - host connected to target 1455 */ 1456static 1457void acornscsi_message(AS_Host *host) 1458{ 1459 unsigned char message[16]; 1460 unsigned int msgidx = 0, msglen = 1; 1461 1462 do { 1463 message[msgidx] = acornscsi_readmessagebyte(host); 1464 1465 switch (msgidx) { 1466 case 0: 1467 if (message[0] == EXTENDED_MESSAGE || 1468 (message[0] >= 0x20 && message[0] <= 0x2f)) 1469 msglen = 2; 1470 break; 1471 1472 case 1: 1473 if (message[0] == EXTENDED_MESSAGE) 1474 msglen += message[msgidx]; 1475 break; 1476 } 1477 msgidx += 1; 1478 if (msgidx < msglen) { 1479 acornscsi_sbic_issuecmd(host, CMND_NEGATEACK); 1480 1481 /* wait for next msg-in */ 1482 acornscsi_sbic_wait(host, ASR_INT, ASR_INT, 1000, "for interrupt after negate ack"); 1483 sbic_arm_read(host->scsi.io_port, SBIC_SSR); 1484 } 1485 } while (msgidx < msglen); 1486 1487#if (DEBUG & DEBUG_MESSAGES) 1488 printk("scsi%d.%c: message in: ", 1489 host->host->host_no, acornscsi_target(host)); 1490 spi_print_msg(message); 1491 printk("\n"); 1492#endif 1493 1494 if (host->scsi.phase == PHASE_RECONNECTED) { 1495 /* 1496 * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.17) 1497 * 'Whenever a target reconnects to an initiator to continue 1498 * a tagged I/O process, the SIMPLE QUEUE TAG message shall 1499 * be sent immediately following the IDENTIFY message...' 1500 */ 1501 if (message[0] == SIMPLE_QUEUE_TAG) 1502 host->scsi.reconnected.tag = message[1]; 1503 if (acornscsi_reconnect_finish(host)) 1504 host->scsi.phase = PHASE_MSGIN; 1505 } 1506 1507 switch (message[0]) { 1508 case ABORT: 1509 case ABORT_TAG: 1510 case COMMAND_COMPLETE: 1511 if (host->scsi.phase != PHASE_STATUSIN) { 1512 printk(KERN_ERR "scsi%d.%c: command complete following non-status in phase?\n", 1513 host->host->host_no, acornscsi_target(host)); 1514 acornscsi_dumplog(host, host->SCpnt->device->id); 1515 } 1516 host->scsi.phase = PHASE_DONE; 1517 host->scsi.SCp.Message = message[0]; 1518 break; 1519 1520 case SAVE_POINTERS: 1521 /* 1522 * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.20) 1523 * 'The SAVE DATA POINTER message is sent from a target to 1524 * direct the initiator to copy the active data pointer to 1525 * the saved data pointer for the current I/O process. 1526 */ 1527 acornscsi_dma_cleanup(host); 1528 host->SCpnt->SCp = host->scsi.SCp; 1529 host->SCpnt->SCp.sent_command = 0; 1530 host->scsi.phase = PHASE_MSGIN; 1531 break; 1532 1533 case RESTORE_POINTERS: 1534 /* 1535 * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.19) 1536 * 'The RESTORE POINTERS message is sent from a target to 1537 * direct the initiator to copy the most recently saved 1538 * command, data, and status pointers for the I/O process 1539 * to the corresponding active pointers. The command and 1540 * status pointers shall be restored to the beginning of 1541 * the present command and status areas.' 1542 */ 1543 acornscsi_dma_cleanup(host); 1544 host->scsi.SCp = host->SCpnt->SCp; 1545 host->scsi.phase = PHASE_MSGIN; 1546 break; 1547 1548 case DISCONNECT: 1549 /* 1550 * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 6.4.2) 1551 * 'On those occasions when an error or exception condition occurs 1552 * and the target elects to repeat the information transfer, the 1553 * target may repeat the transfer either issuing a RESTORE POINTERS 1554 * message or by disconnecting without issuing a SAVE POINTERS 1555 * message. When reconnection is completed, the most recent 1556 * saved pointer values are restored.' 1557 */ 1558 acornscsi_dma_cleanup(host); 1559 host->scsi.phase = PHASE_DISCONNECT; 1560 break; 1561 1562 case MESSAGE_REJECT: 1563#if 0 /* this isn't needed any more */ 1564 /* 1565 * If we were negociating sync transfer, we don't yet know if 1566 * this REJECT is for the sync transfer or for the tagged queue/wide 1567 * transfer. Re-initiate sync transfer negociation now, and if 1568 * we got a REJECT in response to SDTR, then it'll be set to DONE. 1569 */ 1570 if (host->device[host->SCpnt->device->id].sync_state == SYNC_SENT_REQUEST) 1571 host->device[host->SCpnt->device->id].sync_state = SYNC_NEGOCIATE; 1572#endif 1573 1574 /* 1575 * If we have any messages waiting to go out, then assert ATN now 1576 */ 1577 if (msgqueue_msglength(&host->scsi.msgs)) 1578 acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); 1579 1580 switch (host->scsi.last_message) { 1581#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 1582 case HEAD_OF_QUEUE_TAG: 1583 case ORDERED_QUEUE_TAG: 1584 case SIMPLE_QUEUE_TAG: 1585 /* 1586 * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.17) 1587 * If a target does not implement tagged queuing and a queue tag 1588 * message is received, it shall respond with a MESSAGE REJECT 1589 * message and accept the I/O process as if it were untagged. 1590 */ 1591 printk(KERN_NOTICE "scsi%d.%c: disabling tagged queueing\n", 1592 host->host->host_no, acornscsi_target(host)); 1593 host->SCpnt->device->simple_tags = 0; 1594 set_bit(host->SCpnt->device->id * 8 + host->SCpnt->device->lun, host->busyluns); 1595 break; 1596#endif 1597 case EXTENDED_MESSAGE | (EXTENDED_SDTR << 8): 1598 /* 1599 * Target can't handle synchronous transfers 1600 */ 1601 printk(KERN_NOTICE "scsi%d.%c: Using asynchronous transfer\n", 1602 host->host->host_no, acornscsi_target(host)); 1603 host->device[host->SCpnt->device->id].sync_xfer = SYNCHTRANSFER_2DBA; 1604 host->device[host->SCpnt->device->id].sync_state = SYNC_ASYNCHRONOUS; 1605 sbic_arm_write(host->scsi.io_port, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer); 1606 break; 1607 1608 default: 1609 break; 1610 } 1611 break; 1612 1613 case QUEUE_FULL: 1614 /* TODO: target queue is full */ 1615 break; 1616 1617 case SIMPLE_QUEUE_TAG: 1618 /* tag queue reconnect... message[1] = queue tag. Print something to indicate something happened! */ 1619 printk("scsi%d.%c: reconnect queue tag %02X\n", 1620 host->host->host_no, acornscsi_target(host), 1621 message[1]); 1622 break; 1623 1624 case EXTENDED_MESSAGE: 1625 switch (message[2]) { 1626#ifdef CONFIG_SCSI_ACORNSCSI_SYNC 1627 case EXTENDED_SDTR: 1628 if (host->device[host->SCpnt->device->id].sync_state == SYNC_SENT_REQUEST) { 1629 /* 1630 * We requested synchronous transfers. This isn't quite right... 1631 * We can only say if this succeeded if we proceed on to execute the 1632 * command from this message. If we get a MESSAGE PARITY ERROR, 1633 * and the target retries fail, then we fallback to asynchronous mode 1634 */ 1635 host->device[host->SCpnt->device->id].sync_state = SYNC_COMPLETED; 1636 printk(KERN_NOTICE "scsi%d.%c: Using synchronous transfer, offset %d, %d ns\n", 1637 host->host->host_no, acornscsi_target(host), 1638 message[4], message[3] * 4); 1639 host->device[host->SCpnt->device->id].sync_xfer = 1640 calc_sync_xfer(message[3] * 4, message[4]); 1641 } else { 1642 unsigned char period, length; 1643 /* 1644 * Target requested synchronous transfers. The agreement is only 1645 * to be in operation AFTER the target leaves message out phase. 1646 */ 1647 acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); 1648 period = max_t(unsigned int, message[3], sdtr_period / 4); 1649 length = min_t(unsigned int, message[4], sdtr_size); 1650 msgqueue_addmsg(&host->scsi.msgs, 5, EXTENDED_MESSAGE, 3, 1651 EXTENDED_SDTR, period, length); 1652 host->device[host->SCpnt->device->id].sync_xfer = 1653 calc_sync_xfer(period * 4, length); 1654 } 1655 sbic_arm_write(host->scsi.io_port, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer); 1656 break; 1657#else 1658 /* We do not accept synchronous transfers. Respond with a 1659 * MESSAGE_REJECT. 1660 */ 1661#endif 1662 1663 case EXTENDED_WDTR: 1664 /* The WD33C93A is only 8-bit. We respond with a MESSAGE_REJECT 1665 * to a wide data transfer request. 1666 */ 1667 default: 1668 acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); 1669 msgqueue_flush(&host->scsi.msgs); 1670 msgqueue_addmsg(&host->scsi.msgs, 1, MESSAGE_REJECT); 1671 break; 1672 } 1673 break; 1674 1675#ifdef CONFIG_SCSI_ACORNSCSI_LINK 1676 case LINKED_CMD_COMPLETE: 1677 case LINKED_FLG_CMD_COMPLETE: 1678 /* 1679 * We don't support linked commands yet 1680 */ 1681 if (0) { 1682#if (DEBUG & DEBUG_LINK) 1683 printk("scsi%d.%c: lun %d tag %d linked command complete\n", 1684 host->host->host_no, acornscsi_target(host), host->SCpnt->tag); 1685#endif 1686 /* 1687 * A linked command should only terminate with one of these messages 1688 * if there are more linked commands available. 1689 */ 1690 if (!host->SCpnt->next_link) { 1691 printk(KERN_WARNING "scsi%d.%c: lun %d tag %d linked command complete, but no next_link\n", 1692 instance->host_no, acornscsi_target(host), host->SCpnt->tag); 1693 acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); 1694 msgqueue_addmsg(&host->scsi.msgs, 1, ABORT); 1695 } else { 1696 struct scsi_cmnd *SCpnt = host->SCpnt; 1697 1698 acornscsi_dma_cleanup(host); 1699 1700 host->SCpnt = host->SCpnt->next_link; 1701 host->SCpnt->tag = SCpnt->tag; 1702 SCpnt->result = DID_OK | host->scsi.SCp.Message << 8 | host->Scsi.SCp.Status; 1703 SCpnt->done(SCpnt); 1704 1705 /* initialise host->SCpnt->SCp */ 1706 } 1707 break; 1708 } 1709#endif 1710 1711 default: /* reject message */ 1712 printk(KERN_ERR "scsi%d.%c: unrecognised message %02X, rejecting\n", 1713 host->host->host_no, acornscsi_target(host), 1714 message[0]); 1715 acornscsi_sbic_issuecmd(host, CMND_ASSERTATN); 1716 msgqueue_flush(&host->scsi.msgs); 1717 msgqueue_addmsg(&host->scsi.msgs, 1, MESSAGE_REJECT); 1718 host->scsi.phase = PHASE_MSGIN; 1719 break; 1720 } 1721 acornscsi_sbic_issuecmd(host, CMND_NEGATEACK); 1722} 1723 1724/* 1725 * Function: int acornscsi_buildmessages(AS_Host *host) 1726 * Purpose : build the connection messages for a host 1727 * Params : host - host to add messages to 1728 */ 1729static 1730void acornscsi_buildmessages(AS_Host *host) 1731{ 1732#if 0 1733 /* does the device need resetting? */ 1734 if (cmd_reset) { 1735 msgqueue_addmsg(&host->scsi.msgs, 1, BUS_DEVICE_RESET); 1736 return; 1737 } 1738#endif 1739 1740 msgqueue_addmsg(&host->scsi.msgs, 1, 1741 IDENTIFY(host->device[host->SCpnt->device->id].disconnect_ok, 1742 host->SCpnt->device->lun)); 1743 1744#if 0 1745 /* does the device need the current command aborted */ 1746 if (cmd_aborted) { 1747 acornscsi_abortcmd(host->SCpnt->tag); 1748 return; 1749 } 1750#endif 1751 1752#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 1753 if (host->SCpnt->tag) { 1754 unsigned int tag_type; 1755 1756 if (host->SCpnt->cmnd[0] == REQUEST_SENSE || 1757 host->SCpnt->cmnd[0] == TEST_UNIT_READY || 1758 host->SCpnt->cmnd[0] == INQUIRY) 1759 tag_type = HEAD_OF_QUEUE_TAG; 1760 else 1761 tag_type = SIMPLE_QUEUE_TAG; 1762 msgqueue_addmsg(&host->scsi.msgs, 2, tag_type, host->SCpnt->tag); 1763 } 1764#endif 1765 1766#ifdef CONFIG_SCSI_ACORNSCSI_SYNC 1767 if (host->device[host->SCpnt->device->id].sync_state == SYNC_NEGOCIATE) { 1768 host->device[host->SCpnt->device->id].sync_state = SYNC_SENT_REQUEST; 1769 msgqueue_addmsg(&host->scsi.msgs, 5, 1770 EXTENDED_MESSAGE, 3, EXTENDED_SDTR, 1771 sdtr_period / 4, sdtr_size); 1772 } 1773#endif 1774} 1775 1776/* 1777 * Function: int acornscsi_starttransfer(AS_Host *host) 1778 * Purpose : transfer data to/from connected target 1779 * Params : host - host to which target is connected 1780 * Returns : 0 if failure 1781 */ 1782static 1783int acornscsi_starttransfer(AS_Host *host) 1784{ 1785 int residual; 1786 1787 if (!host->scsi.SCp.ptr /*&& host->scsi.SCp.this_residual*/) { 1788 printk(KERN_ERR "scsi%d.%c: null buffer passed to acornscsi_starttransfer\n", 1789 host->host->host_no, acornscsi_target(host)); 1790 return 0; 1791 } 1792 1793 residual = scsi_bufflen(host->SCpnt) - host->scsi.SCp.scsi_xferred; 1794 1795 sbic_arm_write(host->scsi.io_port, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer); 1796 sbic_arm_writenext(host->scsi.io_port, residual >> 16); 1797 sbic_arm_writenext(host->scsi.io_port, residual >> 8); 1798 sbic_arm_writenext(host->scsi.io_port, residual); 1799 acornscsi_sbic_issuecmd(host, CMND_XFERINFO); 1800 return 1; 1801} 1802 1803/* ========================================================================================= 1804 * Connection & Disconnection 1805 */ 1806/* 1807 * Function : acornscsi_reconnect(AS_Host *host) 1808 * Purpose : reconnect a previously disconnected command 1809 * Params : host - host specific data 1810 * Remarks : SCSI spec says: 1811 * 'The set of active pointers is restored from the set 1812 * of saved pointers upon reconnection of the I/O process' 1813 */ 1814static 1815int acornscsi_reconnect(AS_Host *host) 1816{ 1817 unsigned int target, lun, ok = 0; 1818 1819 target = sbic_arm_read(host->scsi.io_port, SBIC_SOURCEID); 1820 1821 if (!(target & 8)) 1822 printk(KERN_ERR "scsi%d: invalid source id after reselection " 1823 "- device fault?\n", 1824 host->host->host_no); 1825 1826 target &= 7; 1827 1828 if (host->SCpnt && !host->scsi.disconnectable) { 1829 printk(KERN_ERR "scsi%d.%d: reconnected while command in " 1830 "progress to target %d?\n", 1831 host->host->host_no, target, host->SCpnt->device->id); 1832 host->SCpnt = NULL; 1833 } 1834 1835 lun = sbic_arm_read(host->scsi.io_port, SBIC_DATA) & 7; 1836 1837 host->scsi.reconnected.target = target; 1838 host->scsi.reconnected.lun = lun; 1839 host->scsi.reconnected.tag = 0; 1840 1841 if (host->scsi.disconnectable && host->SCpnt && 1842 host->SCpnt->device->id == target && host->SCpnt->device->lun == lun) 1843 ok = 1; 1844 1845 if (!ok && queue_probetgtlun(&host->queues.disconnected, target, lun)) 1846 ok = 1; 1847 1848 ADD_STATUS(target, 0x81, host->scsi.phase, 0); 1849 1850 if (ok) { 1851 host->scsi.phase = PHASE_RECONNECTED; 1852 } else { 1853 /* this doesn't seem to work */ 1854 printk(KERN_ERR "scsi%d.%c: reselected with no command " 1855 "to reconnect with\n", 1856 host->host->host_no, '0' + target); 1857 acornscsi_dumplog(host, target); 1858 acornscsi_abortcmd(host, 0); 1859 if (host->SCpnt) { 1860 queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt); 1861 host->SCpnt = NULL; 1862 } 1863 } 1864 acornscsi_sbic_issuecmd(host, CMND_NEGATEACK); 1865 return !ok; 1866} 1867 1868/* 1869 * Function: int acornscsi_reconect_finish(AS_Host *host) 1870 * Purpose : finish reconnecting a command 1871 * Params : host - host to complete 1872 * Returns : 0 if failed 1873 */ 1874static 1875int acornscsi_reconnect_finish(AS_Host *host) 1876{ 1877 if (host->scsi.disconnectable && host->SCpnt) { 1878 host->scsi.disconnectable = 0; 1879 if (host->SCpnt->device->id == host->scsi.reconnected.target && 1880 host->SCpnt->device->lun == host->scsi.reconnected.lun && 1881 host->SCpnt->tag == host->scsi.reconnected.tag) { 1882#if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 1883 DBG(host->SCpnt, printk("scsi%d.%c: reconnected", 1884 host->host->host_no, acornscsi_target(host))); 1885#endif 1886 } else { 1887 queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt); 1888#if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 1889 DBG(host->SCpnt, printk("scsi%d.%c: had to move command " 1890 "to disconnected queue\n", 1891 host->host->host_no, acornscsi_target(host))); 1892#endif 1893 host->SCpnt = NULL; 1894 } 1895 } 1896 if (!host->SCpnt) { 1897 host->SCpnt = queue_remove_tgtluntag(&host->queues.disconnected, 1898 host->scsi.reconnected.target, 1899 host->scsi.reconnected.lun, 1900 host->scsi.reconnected.tag); 1901#if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 1902 DBG(host->SCpnt, printk("scsi%d.%c: had to get command", 1903 host->host->host_no, acornscsi_target(host))); 1904#endif 1905 } 1906 1907 if (!host->SCpnt) 1908 acornscsi_abortcmd(host, host->scsi.reconnected.tag); 1909 else { 1910 /* 1911 * Restore data pointer from SAVED pointers. 1912 */ 1913 host->scsi.SCp = host->SCpnt->SCp; 1914#if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 1915 printk(", data pointers: [%p, %X]", 1916 host->scsi.SCp.ptr, host->scsi.SCp.this_residual); 1917#endif 1918 } 1919#if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON)) 1920 printk("\n"); 1921#endif 1922 1923 host->dma.transferred = host->scsi.SCp.scsi_xferred; 1924 1925 return host->SCpnt != NULL; 1926} 1927 1928/* 1929 * Function: void acornscsi_disconnect_unexpected(AS_Host *host) 1930 * Purpose : handle an unexpected disconnect 1931 * Params : host - host on which disconnect occurred 1932 */ 1933static 1934void acornscsi_disconnect_unexpected(AS_Host *host) 1935{ 1936 printk(KERN_ERR "scsi%d.%c: unexpected disconnect\n", 1937 host->host->host_no, acornscsi_target(host)); 1938#if (DEBUG & DEBUG_ABORT) 1939 acornscsi_dumplog(host, 8); 1940#endif 1941 1942 acornscsi_done(host, &host->SCpnt, DID_ERROR); 1943} 1944 1945/* 1946 * Function: void acornscsi_abortcmd(AS_host *host, unsigned char tag) 1947 * Purpose : abort a currently executing command 1948 * Params : host - host with connected command to abort 1949 * tag - tag to abort 1950 */ 1951static 1952void acornscsi_abortcmd(AS_Host *host, unsigned char tag) 1953{ 1954 host->scsi.phase = PHASE_ABORTED; 1955 sbic_arm_write(host->scsi.io_port, SBIC_CMND, CMND_ASSERTATN); 1956 1957 msgqueue_flush(&host->scsi.msgs); 1958#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 1959 if (tag) 1960 msgqueue_addmsg(&host->scsi.msgs, 2, ABORT_TAG, tag); 1961 else 1962#endif 1963 msgqueue_addmsg(&host->scsi.msgs, 1, ABORT); 1964} 1965 1966/* ========================================================================================== 1967 * Interrupt routines. 1968 */ 1969/* 1970 * Function: int acornscsi_sbicintr(AS_Host *host) 1971 * Purpose : handle interrupts from SCSI device 1972 * Params : host - host to process 1973 * Returns : INTR_PROCESS if expecting another SBIC interrupt 1974 * INTR_IDLE if no interrupt 1975 * INTR_NEXT_COMMAND if we have finished processing the command 1976 */ 1977static 1978intr_ret_t acornscsi_sbicintr(AS_Host *host, int in_irq) 1979{ 1980 unsigned int asr, ssr; 1981 1982 asr = sbic_arm_read(host->scsi.io_port, SBIC_ASR); 1983 if (!(asr & ASR_INT)) 1984 return INTR_IDLE; 1985 1986 ssr = sbic_arm_read(host->scsi.io_port, SBIC_SSR); 1987 1988#if (DEBUG & DEBUG_PHASES) 1989 print_sbic_status(asr, ssr, host->scsi.phase); 1990#endif 1991 1992 ADD_STATUS(8, ssr, host->scsi.phase, in_irq); 1993 1994 if (host->SCpnt && !host->scsi.disconnectable) 1995 ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, in_irq); 1996 1997 switch (ssr) { 1998 case 0x00: /* reset state - not advanced */ 1999 printk(KERN_ERR "scsi%d: reset in standard mode but wanted advanced mode.\n", 2000 host->host->host_no); 2001 /* setup sbic - WD33C93A */ 2002 sbic_arm_write(host->scsi.io_port, SBIC_OWNID, OWNID_EAF | host->host->this_id); 2003 sbic_arm_write(host->scsi.io_port, SBIC_CMND, CMND_RESET); 2004 return INTR_IDLE; 2005 2006 case 0x01: /* reset state - advanced */ 2007 sbic_arm_write(host->scsi.io_port, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI); 2008 sbic_arm_write(host->scsi.io_port, SBIC_TIMEOUT, TIMEOUT_TIME); 2009 sbic_arm_write(host->scsi.io_port, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA); 2010 sbic_arm_write(host->scsi.io_port, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP); 2011 msgqueue_flush(&host->scsi.msgs); 2012 return INTR_IDLE; 2013 2014 case 0x41: /* unexpected disconnect aborted command */ 2015 acornscsi_disconnect_unexpected(host); 2016 return INTR_NEXT_COMMAND; 2017 } 2018 2019 switch (host->scsi.phase) { 2020 case PHASE_CONNECTING: /* STATE: command removed from issue queue */ 2021 switch (ssr) { 2022 case 0x11: /* -> PHASE_CONNECTED */ 2023 /* BUS FREE -> SELECTION */ 2024 host->scsi.phase = PHASE_CONNECTED; 2025 msgqueue_flush(&host->scsi.msgs); 2026 host->dma.transferred = host->scsi.SCp.scsi_xferred; 2027 /* 33C93 gives next interrupt indicating bus phase */ 2028 asr = sbic_arm_read(host->scsi.io_port, SBIC_ASR); 2029 if (!(asr & ASR_INT)) 2030 break; 2031 ssr = sbic_arm_read(host->scsi.io_port, SBIC_SSR); 2032 ADD_STATUS(8, ssr, host->scsi.phase, 1); 2033 ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, 1); 2034 goto connected; 2035 2036 case 0x42: /* select timed out */ 2037 /* -> PHASE_IDLE */ 2038 acornscsi_done(host, &host->SCpnt, DID_NO_CONNECT); 2039 return INTR_NEXT_COMMAND; 2040 2041 case 0x81: /* -> PHASE_RECONNECTED or PHASE_ABORTED */ 2042 /* BUS FREE -> RESELECTION */ 2043 host->origSCpnt = host->SCpnt; 2044 host->SCpnt = NULL; 2045 msgqueue_flush(&host->scsi.msgs); 2046 acornscsi_reconnect(host); 2047 break; 2048 2049 default: 2050 printk(KERN_ERR "scsi%d.%c: PHASE_CONNECTING, SSR %02X?\n", 2051 host->host->host_no, acornscsi_target(host), ssr); 2052 acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 2053 acornscsi_abortcmd(host, host->SCpnt->tag); 2054 } 2055 return INTR_PROCESSING; 2056 2057 connected: 2058 case PHASE_CONNECTED: /* STATE: device selected ok */ 2059 switch (ssr) { 2060#ifdef NONSTANDARD 2061 case 0x8a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ 2062 /* SELECTION -> COMMAND */ 2063 acornscsi_sendcommand(host); 2064 break; 2065 2066 case 0x8b: /* -> PHASE_STATUS */ 2067 /* SELECTION -> STATUS */ 2068 acornscsi_readstatusbyte(host); 2069 host->scsi.phase = PHASE_STATUSIN; 2070 break; 2071#endif 2072 2073 case 0x8e: /* -> PHASE_MSGOUT */ 2074 /* SELECTION ->MESSAGE OUT */ 2075 host->scsi.phase = PHASE_MSGOUT; 2076 acornscsi_buildmessages(host); 2077 acornscsi_sendmessage(host); 2078 break; 2079 2080 /* these should not happen */ 2081 case 0x85: /* target disconnected */ 2082 acornscsi_done(host, &host->SCpnt, DID_ERROR); 2083 break; 2084 2085 default: 2086 printk(KERN_ERR "scsi%d.%c: PHASE_CONNECTED, SSR %02X?\n", 2087 host->host->host_no, acornscsi_target(host), ssr); 2088 acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 2089 acornscsi_abortcmd(host, host->SCpnt->tag); 2090 } 2091 return INTR_PROCESSING; 2092 2093 case PHASE_MSGOUT: /* STATE: connected & sent IDENTIFY message */ 2094 /* 2095 * SCSI standard says that MESSAGE OUT phases can be followed by a 2096 * DATA phase, STATUS phase, MESSAGE IN phase or COMMAND phase 2097 */ 2098 switch (ssr) { 2099 case 0x8a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ 2100 case 0x1a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ 2101 /* MESSAGE OUT -> COMMAND */ 2102 acornscsi_sendcommand(host); 2103 break; 2104 2105 case 0x8b: /* -> PHASE_STATUS */ 2106 case 0x1b: /* -> PHASE_STATUS */ 2107 /* MESSAGE OUT -> STATUS */ 2108 acornscsi_readstatusbyte(host); 2109 host->scsi.phase = PHASE_STATUSIN; 2110 break; 2111 2112 case 0x8e: /* -> PHASE_MSGOUT */ 2113 /* MESSAGE_OUT(MESSAGE_IN) ->MESSAGE OUT */ 2114 acornscsi_sendmessage(host); 2115 break; 2116 2117 case 0x4f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 2118 case 0x1f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 2119 /* MESSAGE OUT -> MESSAGE IN */ 2120 acornscsi_message(host); 2121 break; 2122 2123 default: 2124 printk(KERN_ERR "scsi%d.%c: PHASE_MSGOUT, SSR %02X?\n", 2125 host->host->host_no, acornscsi_target(host), ssr); 2126 acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 2127 } 2128 return INTR_PROCESSING; 2129 2130 case PHASE_COMMAND: /* STATE: connected & command sent */ 2131 switch (ssr) { 2132 case 0x18: /* -> PHASE_DATAOUT */ 2133 /* COMMAND -> DATA OUT */ 2134 if (host->scsi.SCp.sent_command != host->SCpnt->cmd_len) 2135 acornscsi_abortcmd(host, host->SCpnt->tag); 2136 acornscsi_dma_setup(host, DMA_OUT); 2137 if (!acornscsi_starttransfer(host)) 2138 acornscsi_abortcmd(host, host->SCpnt->tag); 2139 host->scsi.phase = PHASE_DATAOUT; 2140 return INTR_IDLE; 2141 2142 case 0x19: /* -> PHASE_DATAIN */ 2143 /* COMMAND -> DATA IN */ 2144 if (host->scsi.SCp.sent_command != host->SCpnt->cmd_len) 2145 acornscsi_abortcmd(host, host->SCpnt->tag); 2146 acornscsi_dma_setup(host, DMA_IN); 2147 if (!acornscsi_starttransfer(host)) 2148 acornscsi_abortcmd(host, host->SCpnt->tag); 2149 host->scsi.phase = PHASE_DATAIN; 2150 return INTR_IDLE; 2151 2152 case 0x1b: /* -> PHASE_STATUS */ 2153 /* COMMAND -> STATUS */ 2154 acornscsi_readstatusbyte(host); 2155 host->scsi.phase = PHASE_STATUSIN; 2156 break; 2157 2158 case 0x1e: /* -> PHASE_MSGOUT */ 2159 /* COMMAND -> MESSAGE OUT */ 2160 acornscsi_sendmessage(host); 2161 break; 2162 2163 case 0x1f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 2164 /* COMMAND -> MESSAGE IN */ 2165 acornscsi_message(host); 2166 break; 2167 2168 default: 2169 printk(KERN_ERR "scsi%d.%c: PHASE_COMMAND, SSR %02X?\n", 2170 host->host->host_no, acornscsi_target(host), ssr); 2171 acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 2172 } 2173 return INTR_PROCESSING; 2174 2175 case PHASE_DISCONNECT: /* STATE: connected, received DISCONNECT msg */ 2176 if (ssr == 0x85) { /* -> PHASE_IDLE */ 2177 host->scsi.disconnectable = 1; 2178 host->scsi.reconnected.tag = 0; 2179 host->scsi.phase = PHASE_IDLE; 2180 host->stats.disconnects += 1; 2181 } else { 2182 printk(KERN_ERR "scsi%d.%c: PHASE_DISCONNECT, SSR %02X instead of disconnect?\n", 2183 host->host->host_no, acornscsi_target(host), ssr); 2184 acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 2185 } 2186 return INTR_NEXT_COMMAND; 2187 2188 case PHASE_IDLE: /* STATE: disconnected */ 2189 if (ssr == 0x81) /* -> PHASE_RECONNECTED or PHASE_ABORTED */ 2190 acornscsi_reconnect(host); 2191 else { 2192 printk(KERN_ERR "scsi%d.%c: PHASE_IDLE, SSR %02X while idle?\n", 2193 host->host->host_no, acornscsi_target(host), ssr); 2194 acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 2195 } 2196 return INTR_PROCESSING; 2197 2198 case PHASE_RECONNECTED: /* STATE: device reconnected to initiator */ 2199 /* 2200 * Command reconnected - if MESGIN, get message - it may be 2201 * the tag. If not, get command out of disconnected queue 2202 */ 2203 /* 2204 * If we reconnected and we're not in MESSAGE IN phase after IDENTIFY, 2205 * reconnect I_T_L command 2206 */ 2207 if (ssr != 0x8f && !acornscsi_reconnect_finish(host)) 2208 return INTR_IDLE; 2209 ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, in_irq); 2210 switch (ssr) { 2211 case 0x88: /* data out phase */ 2212 /* -> PHASE_DATAOUT */ 2213 /* MESSAGE IN -> DATA OUT */ 2214 acornscsi_dma_setup(host, DMA_OUT); 2215 if (!acornscsi_starttransfer(host)) 2216 acornscsi_abortcmd(host, host->SCpnt->tag); 2217 host->scsi.phase = PHASE_DATAOUT; 2218 return INTR_IDLE; 2219 2220 case 0x89: /* data in phase */ 2221 /* -> PHASE_DATAIN */ 2222 /* MESSAGE IN -> DATA IN */ 2223 acornscsi_dma_setup(host, DMA_IN); 2224 if (!acornscsi_starttransfer(host)) 2225 acornscsi_abortcmd(host, host->SCpnt->tag); 2226 host->scsi.phase = PHASE_DATAIN; 2227 return INTR_IDLE; 2228 2229 case 0x8a: /* command out */ 2230 /* MESSAGE IN -> COMMAND */ 2231 acornscsi_sendcommand(host);/* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */ 2232 break; 2233 2234 case 0x8b: /* status in */ 2235 /* -> PHASE_STATUSIN */ 2236 /* MESSAGE IN -> STATUS */ 2237 acornscsi_readstatusbyte(host); 2238 host->scsi.phase = PHASE_STATUSIN; 2239 break; 2240 2241 case 0x8e: /* message out */ 2242 /* -> PHASE_MSGOUT */ 2243 /* MESSAGE IN -> MESSAGE OUT */ 2244 acornscsi_sendmessage(host); 2245 break; 2246 2247 case 0x8f: /* message in */ 2248 acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 2249 break; 2250 2251 default: 2252 printk(KERN_ERR "scsi%d.%c: PHASE_RECONNECTED, SSR %02X after reconnect?\n", 2253 host->host->host_no, acornscsi_target(host), ssr); 2254 acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 2255 } 2256 return INTR_PROCESSING; 2257 2258 case PHASE_DATAIN: /* STATE: transferred data in */ 2259 /* 2260 * This is simple - if we disconnect then the DMA address & count is 2261 * correct. 2262 */ 2263 switch (ssr) { 2264 case 0x19: /* -> PHASE_DATAIN */ 2265 case 0x89: /* -> PHASE_DATAIN */ 2266 acornscsi_abortcmd(host, host->SCpnt->tag); 2267 return INTR_IDLE; 2268 2269 case 0x1b: /* -> PHASE_STATUSIN */ 2270 case 0x4b: /* -> PHASE_STATUSIN */ 2271 case 0x8b: /* -> PHASE_STATUSIN */ 2272 /* DATA IN -> STATUS */ 2273 host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 2274 acornscsi_sbic_xfcount(host); 2275 acornscsi_dma_stop(host); 2276 acornscsi_readstatusbyte(host); 2277 host->scsi.phase = PHASE_STATUSIN; 2278 break; 2279 2280 case 0x1e: /* -> PHASE_MSGOUT */ 2281 case 0x4e: /* -> PHASE_MSGOUT */ 2282 case 0x8e: /* -> PHASE_MSGOUT */ 2283 /* DATA IN -> MESSAGE OUT */ 2284 host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 2285 acornscsi_sbic_xfcount(host); 2286 acornscsi_dma_stop(host); 2287 acornscsi_sendmessage(host); 2288 break; 2289 2290 case 0x1f: /* message in */ 2291 case 0x4f: /* message in */ 2292 case 0x8f: /* message in */ 2293 /* DATA IN -> MESSAGE IN */ 2294 host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 2295 acornscsi_sbic_xfcount(host); 2296 acornscsi_dma_stop(host); 2297 acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 2298 break; 2299 2300 default: 2301 printk(KERN_ERR "scsi%d.%c: PHASE_DATAIN, SSR %02X?\n", 2302 host->host->host_no, acornscsi_target(host), ssr); 2303 acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 2304 } 2305 return INTR_PROCESSING; 2306 2307 case PHASE_DATAOUT: /* STATE: transferred data out */ 2308 /* 2309 * This is more complicated - if we disconnect, the DMA could be 12 2310 * bytes ahead of us. We need to correct this. 2311 */ 2312 switch (ssr) { 2313 case 0x18: /* -> PHASE_DATAOUT */ 2314 case 0x88: /* -> PHASE_DATAOUT */ 2315 acornscsi_abortcmd(host, host->SCpnt->tag); 2316 return INTR_IDLE; 2317 2318 case 0x1b: /* -> PHASE_STATUSIN */ 2319 case 0x4b: /* -> PHASE_STATUSIN */ 2320 case 0x8b: /* -> PHASE_STATUSIN */ 2321 /* DATA OUT -> STATUS */ 2322 host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 2323 acornscsi_sbic_xfcount(host); 2324 acornscsi_dma_stop(host); 2325 acornscsi_dma_adjust(host); 2326 acornscsi_readstatusbyte(host); 2327 host->scsi.phase = PHASE_STATUSIN; 2328 break; 2329 2330 case 0x1e: /* -> PHASE_MSGOUT */ 2331 case 0x4e: /* -> PHASE_MSGOUT */ 2332 case 0x8e: /* -> PHASE_MSGOUT */ 2333 /* DATA OUT -> MESSAGE OUT */ 2334 host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 2335 acornscsi_sbic_xfcount(host); 2336 acornscsi_dma_stop(host); 2337 acornscsi_dma_adjust(host); 2338 acornscsi_sendmessage(host); 2339 break; 2340 2341 case 0x1f: /* message in */ 2342 case 0x4f: /* message in */ 2343 case 0x8f: /* message in */ 2344 /* DATA OUT -> MESSAGE IN */ 2345 host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) - 2346 acornscsi_sbic_xfcount(host); 2347 acornscsi_dma_stop(host); 2348 acornscsi_dma_adjust(host); 2349 acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */ 2350 break; 2351 2352 default: 2353 printk(KERN_ERR "scsi%d.%c: PHASE_DATAOUT, SSR %02X?\n", 2354 host->host->host_no, acornscsi_target(host), ssr); 2355 acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 2356 } 2357 return INTR_PROCESSING; 2358 2359 case PHASE_STATUSIN: /* STATE: status in complete */ 2360 switch (ssr) { 2361 case 0x1f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */ 2362 case 0x8f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */ 2363 /* STATUS -> MESSAGE IN */ 2364 acornscsi_message(host); 2365 break; 2366 2367 case 0x1e: /* -> PHASE_MSGOUT */ 2368 case 0x8e: /* -> PHASE_MSGOUT */ 2369 /* STATUS -> MESSAGE OUT */ 2370 acornscsi_sendmessage(host); 2371 break; 2372 2373 default: 2374 printk(KERN_ERR "scsi%d.%c: PHASE_STATUSIN, SSR %02X instead of MESSAGE_IN?\n", 2375 host->host->host_no, acornscsi_target(host), ssr); 2376 acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 2377 } 2378 return INTR_PROCESSING; 2379 2380 case PHASE_MSGIN: /* STATE: message in */ 2381 switch (ssr) { 2382 case 0x1e: /* -> PHASE_MSGOUT */ 2383 case 0x4e: /* -> PHASE_MSGOUT */ 2384 case 0x8e: /* -> PHASE_MSGOUT */ 2385 /* MESSAGE IN -> MESSAGE OUT */ 2386 acornscsi_sendmessage(host); 2387 break; 2388 2389 case 0x1f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */ 2390 case 0x2f: 2391 case 0x4f: 2392 case 0x8f: 2393 acornscsi_message(host); 2394 break; 2395 2396 case 0x85: 2397 printk("scsi%d.%c: strange message in disconnection\n", 2398 host->host->host_no, acornscsi_target(host)); 2399 acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 2400 acornscsi_done(host, &host->SCpnt, DID_ERROR); 2401 break; 2402 2403 default: 2404 printk(KERN_ERR "scsi%d.%c: PHASE_MSGIN, SSR %02X after message in?\n", 2405 host->host->host_no, acornscsi_target(host), ssr); 2406 acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 2407 } 2408 return INTR_PROCESSING; 2409 2410 case PHASE_DONE: /* STATE: received status & message */ 2411 switch (ssr) { 2412 case 0x85: /* -> PHASE_IDLE */ 2413 acornscsi_done(host, &host->SCpnt, DID_OK); 2414 return INTR_NEXT_COMMAND; 2415 2416 case 0x1e: 2417 case 0x8e: 2418 acornscsi_sendmessage(host); 2419 break; 2420 2421 default: 2422 printk(KERN_ERR "scsi%d.%c: PHASE_DONE, SSR %02X instead of disconnect?\n", 2423 host->host->host_no, acornscsi_target(host), ssr); 2424 acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 2425 } 2426 return INTR_PROCESSING; 2427 2428 case PHASE_ABORTED: 2429 switch (ssr) { 2430 case 0x85: 2431 if (host->SCpnt) 2432 acornscsi_done(host, &host->SCpnt, DID_ABORT); 2433 else { 2434 clear_bit(host->scsi.reconnected.target * 8 + host->scsi.reconnected.lun, 2435 host->busyluns); 2436 host->scsi.phase = PHASE_IDLE; 2437 } 2438 return INTR_NEXT_COMMAND; 2439 2440 case 0x1e: 2441 case 0x2e: 2442 case 0x4e: 2443 case 0x8e: 2444 acornscsi_sendmessage(host); 2445 break; 2446 2447 default: 2448 printk(KERN_ERR "scsi%d.%c: PHASE_ABORTED, SSR %02X?\n", 2449 host->host->host_no, acornscsi_target(host), ssr); 2450 acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 2451 } 2452 return INTR_PROCESSING; 2453 2454 default: 2455 printk(KERN_ERR "scsi%d.%c: unknown driver phase %d\n", 2456 host->host->host_no, acornscsi_target(host), ssr); 2457 acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8); 2458 } 2459 return INTR_PROCESSING; 2460} 2461 2462/* 2463 * Prototype: void acornscsi_intr(int irq, void *dev_id) 2464 * Purpose : handle interrupts from Acorn SCSI card 2465 * Params : irq - interrupt number 2466 * dev_id - device specific data (AS_Host structure) 2467 */ 2468static irqreturn_t 2469acornscsi_intr(int irq, void *dev_id) 2470{ 2471 AS_Host *host = (AS_Host *)dev_id; 2472 intr_ret_t ret; 2473 int iostatus; 2474 int in_irq = 0; 2475 2476 do { 2477 ret = INTR_IDLE; 2478 2479 iostatus = inb(host->card.io_intr); 2480 2481 if (iostatus & 2) { 2482 acornscsi_dma_intr(host); 2483 iostatus = inb(host->card.io_intr); 2484 } 2485 2486 if (iostatus & 8) 2487 ret = acornscsi_sbicintr(host, in_irq); 2488 2489 /* 2490 * If we have a transfer pending, start it. 2491 * Only start it if the interface has already started transferring 2492 * it's data 2493 */ 2494 if (host->dma.xfer_required) 2495 acornscsi_dma_xfer(host); 2496 2497 if (ret == INTR_NEXT_COMMAND) 2498 ret = acornscsi_kick(host); 2499 2500 in_irq = 1; 2501 } while (ret != INTR_IDLE); 2502 2503 return IRQ_HANDLED; 2504} 2505 2506/*============================================================================================= 2507 * Interfaces between interrupt handler and rest of scsi code 2508 */ 2509 2510/* 2511 * Function : acornscsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) 2512 * Purpose : queues a SCSI command 2513 * Params : cmd - SCSI command 2514 * done - function called on completion, with pointer to command descriptor 2515 * Returns : 0, or < 0 on error. 2516 */ 2517int acornscsi_queuecmd(struct scsi_cmnd *SCpnt, 2518 void (*done)(struct scsi_cmnd *)) 2519{ 2520 AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata; 2521 2522 if (!done) { 2523 /* there should be some way of rejecting errors like this without panicing... */ 2524 panic("scsi%d: queuecommand called with NULL done function [cmd=%p]", 2525 host->host->host_no, SCpnt); 2526 return -EINVAL; 2527 } 2528 2529#if (DEBUG & DEBUG_NO_WRITE) 2530 if (acornscsi_cmdtype(SCpnt->cmnd[0]) == CMD_WRITE && (NO_WRITE & (1 << SCpnt->device->id))) { 2531 printk(KERN_CRIT "scsi%d.%c: WRITE attempted with NO_WRITE flag set\n", 2532 host->host->host_no, '0' + SCpnt->device->id); 2533 SCpnt->result = DID_NO_CONNECT << 16; 2534 done(SCpnt); 2535 return 0; 2536 } 2537#endif 2538 2539 SCpnt->scsi_done = done; 2540 SCpnt->host_scribble = NULL; 2541 SCpnt->result = 0; 2542 SCpnt->tag = 0; 2543 SCpnt->SCp.phase = (int)acornscsi_datadirection(SCpnt->cmnd[0]); 2544 SCpnt->SCp.sent_command = 0; 2545 SCpnt->SCp.scsi_xferred = 0; 2546 2547 init_SCp(SCpnt); 2548 2549 host->stats.queues += 1; 2550 2551 { 2552 unsigned long flags; 2553 2554 if (!queue_add_cmd_ordered(&host->queues.issue, SCpnt)) { 2555 SCpnt->result = DID_ERROR << 16; 2556 done(SCpnt); 2557 return 0; 2558 } 2559 local_irq_save(flags); 2560 if (host->scsi.phase == PHASE_IDLE) 2561 acornscsi_kick(host); 2562 local_irq_restore(flags); 2563 } 2564 return 0; 2565} 2566 2567/* 2568 * Prototype: void acornscsi_reportstatus(struct scsi_cmnd **SCpntp1, struct scsi_cmnd **SCpntp2, int result) 2569 * Purpose : pass a result to *SCpntp1, and check if *SCpntp1 = *SCpntp2 2570 * Params : SCpntp1 - pointer to command to return 2571 * SCpntp2 - pointer to command to check 2572 * result - result to pass back to mid-level done function 2573 * Returns : *SCpntp2 = NULL if *SCpntp1 is the same command structure as *SCpntp2. 2574 */ 2575static inline void acornscsi_reportstatus(struct scsi_cmnd **SCpntp1, 2576 struct scsi_cmnd **SCpntp2, 2577 int result) 2578{ 2579 struct scsi_cmnd *SCpnt = *SCpntp1; 2580 2581 if (SCpnt) { 2582 *SCpntp1 = NULL; 2583 2584 SCpnt->result = result; 2585 SCpnt->scsi_done(SCpnt); 2586 } 2587 2588 if (SCpnt == *SCpntp2) 2589 *SCpntp2 = NULL; 2590} 2591 2592enum res_abort { res_not_running, res_success, res_success_clear, res_snooze }; 2593 2594/* 2595 * Prototype: enum res acornscsi_do_abort(struct scsi_cmnd *SCpnt) 2596 * Purpose : abort a command on this host 2597 * Params : SCpnt - command to abort 2598 * Returns : our abort status 2599 */ 2600static enum res_abort acornscsi_do_abort(AS_Host *host, struct scsi_cmnd *SCpnt) 2601{ 2602 enum res_abort res = res_not_running; 2603 2604 if (queue_remove_cmd(&host->queues.issue, SCpnt)) { 2605 /* 2606 * The command was on the issue queue, and has not been 2607 * issued yet. We can remove the command from the queue, 2608 * and acknowledge the abort. Neither the devices nor the 2609 * interface know about the command. 2610 */ 2611//#if (DEBUG & DEBUG_ABORT) 2612 printk("on issue queue "); 2613//#endif 2614 res = res_success; 2615 } else if (queue_remove_cmd(&host->queues.disconnected, SCpnt)) { 2616 /* 2617 * The command was on the disconnected queue. Simply 2618 * acknowledge the abort condition, and when the target 2619 * reconnects, we will give it an ABORT message. The 2620 * target should then disconnect, and we will clear 2621 * the busylun bit. 2622 */ 2623//#if (DEBUG & DEBUG_ABORT) 2624 printk("on disconnected queue "); 2625//#endif 2626 res = res_success; 2627 } else if (host->SCpnt == SCpnt) { 2628 unsigned long flags; 2629 2630//#if (DEBUG & DEBUG_ABORT) 2631 printk("executing "); 2632//#endif 2633 2634 local_irq_save(flags); 2635 switch (host->scsi.phase) { 2636 /* 2637 * If the interface is idle, and the command is 'disconnectable', 2638 * then it is the same as on the disconnected queue. We simply 2639 * remove all traces of the command. When the target reconnects, 2640 * we will give it an ABORT message since the command could not 2641 * be found. When the target finally disconnects, we will clear 2642 * the busylun bit. 2643 */ 2644 case PHASE_IDLE: 2645 if (host->scsi.disconnectable) { 2646 host->scsi.disconnectable = 0; 2647 host->SCpnt = NULL; 2648 res = res_success; 2649 } 2650 break; 2651 2652 /* 2653 * If the command has connected and done nothing further, 2654 * simply force a disconnect. We also need to clear the 2655 * busylun bit. 2656 */ 2657 case PHASE_CONNECTED: 2658 sbic_arm_write(host->scsi.io_port, SBIC_CMND, CMND_DISCONNECT); 2659 host->SCpnt = NULL; 2660 res = res_success_clear; 2661 break; 2662 2663 default: 2664 acornscsi_abortcmd(host, host->SCpnt->tag); 2665 res = res_snooze; 2666 } 2667 local_irq_restore(flags); 2668 } else if (host->origSCpnt == SCpnt) { 2669 /* 2670 * The command will be executed next, but a command 2671 * is currently using the interface. This is similar to 2672 * being on the issue queue, except the busylun bit has 2673 * been set. 2674 */ 2675 host->origSCpnt = NULL; 2676//#if (DEBUG & DEBUG_ABORT) 2677 printk("waiting for execution "); 2678//#endif 2679 res = res_success_clear; 2680 } else 2681 printk("unknown "); 2682 2683 return res; 2684} 2685 2686/* 2687 * Prototype: int acornscsi_abort(struct scsi_cmnd *SCpnt) 2688 * Purpose : abort a command on this host 2689 * Params : SCpnt - command to abort 2690 * Returns : one of SCSI_ABORT_ macros 2691 */ 2692int acornscsi_abort(struct scsi_cmnd *SCpnt) 2693{ 2694 AS_Host *host = (AS_Host *) SCpnt->device->host->hostdata; 2695 int result; 2696 2697 host->stats.aborts += 1; 2698 2699#if (DEBUG & DEBUG_ABORT) 2700 { 2701 int asr, ssr; 2702 asr = sbic_arm_read(host->scsi.io_port, SBIC_ASR); 2703 ssr = sbic_arm_read(host->scsi.io_port, SBIC_SSR); 2704 2705 printk(KERN_WARNING "acornscsi_abort: "); 2706 print_sbic_status(asr, ssr, host->scsi.phase); 2707 acornscsi_dumplog(host, SCpnt->device->id); 2708 } 2709#endif 2710 2711 printk("scsi%d: ", host->host->host_no); 2712 2713 switch (acornscsi_do_abort(host, SCpnt)) { 2714 /* 2715 * We managed to find the command and cleared it out. 2716 * We do not expect the command to be executing on the 2717 * target, but we have set the busylun bit. 2718 */ 2719 case res_success_clear: 2720//#if (DEBUG & DEBUG_ABORT) 2721 printk("clear "); 2722//#endif 2723 clear_bit(SCpnt->device->id * 8 + SCpnt->device->lun, host->busyluns); 2724 2725 /* 2726 * We found the command, and cleared it out. Either 2727 * the command is still known to be executing on the 2728 * target, or the busylun bit is not set. 2729 */ 2730 case res_success: 2731//#if (DEBUG & DEBUG_ABORT) 2732 printk("success\n"); 2733//#endif 2734 result = SUCCESS; 2735 break; 2736 2737 /* 2738 * We did find the command, but unfortunately we couldn't 2739 * unhook it from ourselves. Wait some more, and if it 2740 * still doesn't complete, reset the interface. 2741 */ 2742 case res_snooze: 2743//#if (DEBUG & DEBUG_ABORT) 2744 printk("snooze\n"); 2745//#endif 2746 result = FAILED; 2747 break; 2748 2749 /* 2750 * The command could not be found (either because it completed, 2751 * or it got dropped. 2752 */ 2753 default: 2754 case res_not_running: 2755 acornscsi_dumplog(host, SCpnt->device->id); 2756 result = FAILED; 2757//#if (DEBUG & DEBUG_ABORT) 2758 printk("not running\n"); 2759//#endif 2760 break; 2761 } 2762 2763 return result; 2764} 2765 2766/* 2767 * Prototype: int acornscsi_reset(struct scsi_cmnd *SCpnt) 2768 * Purpose : reset a command on this host/reset this host 2769 * Params : SCpnt - command causing reset 2770 * Returns : one of SCSI_RESET_ macros 2771 */ 2772int acornscsi_bus_reset(struct scsi_cmnd *SCpnt) 2773{ 2774 AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata; 2775 struct scsi_cmnd *SCptr; 2776 2777 host->stats.resets += 1; 2778 2779#if (DEBUG & DEBUG_RESET) 2780 { 2781 int asr, ssr; 2782 2783 asr = sbic_arm_read(host->scsi.io_port, SBIC_ASR); 2784 ssr = sbic_arm_read(host->scsi.io_port, SBIC_SSR); 2785 2786 printk(KERN_WARNING "acornscsi_reset: "); 2787 print_sbic_status(asr, ssr, host->scsi.phase); 2788 acornscsi_dumplog(host, SCpnt->device->id); 2789 } 2790#endif 2791 2792 acornscsi_dma_stop(host); 2793 2794 /* 2795 * do hard reset. This resets all devices on this host, and so we 2796 * must set the reset status on all commands. 2797 */ 2798 acornscsi_resetcard(host); 2799 2800 while ((SCptr = queue_remove(&host->queues.disconnected)) != NULL) 2801 ; 2802 2803 return SUCCESS; 2804} 2805 2806/*============================================================================================== 2807 * initialisation & miscellaneous support 2808 */ 2809 2810/* 2811 * Function: char *acornscsi_info(struct Scsi_Host *host) 2812 * Purpose : return a string describing this interface 2813 * Params : host - host to give information on 2814 * Returns : a constant string 2815 */ 2816const 2817char *acornscsi_info(struct Scsi_Host *host) 2818{ 2819 static char string[100], *p; 2820 2821 p = string; 2822 2823 p += sprintf(string, "%s at port %08lX irq %d v%d.%d.%d" 2824#ifdef CONFIG_SCSI_ACORNSCSI_SYNC 2825 " SYNC" 2826#endif 2827#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 2828 " TAG" 2829#endif 2830#ifdef CONFIG_SCSI_ACORNSCSI_LINK 2831 " LINK" 2832#endif 2833#if (DEBUG & DEBUG_NO_WRITE) 2834 " NOWRITE ("NO_WRITE_STR")" 2835#endif 2836 , host->hostt->name, host->io_port, host->irq, 2837 VER_MAJOR, VER_MINOR, VER_PATCH); 2838 return string; 2839} 2840 2841int acornscsi_proc_info(struct Scsi_Host *instance, char *buffer, char **start, off_t offset, 2842 int length, int inout) 2843{ 2844 int pos, begin = 0, devidx; 2845 struct scsi_device *scd; 2846 AS_Host *host; 2847 char *p = buffer; 2848 2849 if (inout == 1) 2850 return -EINVAL; 2851 2852 host = (AS_Host *)instance->hostdata; 2853 2854 p += sprintf(p, "AcornSCSI driver v%d.%d.%d" 2855#ifdef CONFIG_SCSI_ACORNSCSI_SYNC 2856 " SYNC" 2857#endif 2858#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE 2859 " TAG" 2860#endif 2861#ifdef CONFIG_SCSI_ACORNSCSI_LINK 2862 " LINK" 2863#endif 2864#if (DEBUG & DEBUG_NO_WRITE) 2865 " NOWRITE ("NO_WRITE_STR")" 2866#endif 2867 "\n\n", VER_MAJOR, VER_MINOR, VER_PATCH); 2868 2869 p += sprintf(p, "SBIC: WD33C93A Address: %08X IRQ : %d\n", 2870 host->scsi.io_port, host->scsi.irq); 2871#ifdef USE_DMAC 2872 p += sprintf(p, "DMAC: uPC71071 Address: %08X IRQ : %d\n\n", 2873 host->dma.io_port, host->scsi.irq); 2874#endif 2875 2876 p += sprintf(p, "Statistics:\n" 2877 "Queued commands: %-10u Issued commands: %-10u\n" 2878 "Done commands : %-10u Reads : %-10u\n" 2879 "Writes : %-10u Others : %-10u\n" 2880 "Disconnects : %-10u Aborts : %-10u\n" 2881 "Resets : %-10u\n\nLast phases:", 2882 host->stats.queues, host->stats.removes, 2883 host->stats.fins, host->stats.reads, 2884 host->stats.writes, host->stats.miscs, 2885 host->stats.disconnects, host->stats.aborts, 2886 host->stats.resets); 2887 2888 for (devidx = 0; devidx < 9; devidx ++) { 2889 unsigned int statptr, prev; 2890 2891 p += sprintf(p, "\n%c:", devidx == 8 ? 'H' : ('0' + devidx)); 2892 statptr = host->status_ptr[devidx] - 10; 2893 2894 if ((signed int)statptr < 0) 2895 statptr += STATUS_BUFFER_SIZE; 2896 2897 prev = host->status[devidx][statptr].when; 2898 2899 for (; statptr != host->status_ptr[devidx]; statptr = (statptr + 1) & (STATUS_BUFFER_SIZE - 1)) { 2900 if (host->status[devidx][statptr].when) { 2901 p += sprintf(p, "%c%02X:%02X+%2ld", 2902 host->status[devidx][statptr].irq ? '-' : ' ', 2903 host->status[devidx][statptr].ph, 2904 host->status[devidx][statptr].ssr, 2905 (host->status[devidx][statptr].when - prev) < 100 ? 2906 (host->status[devidx][statptr].when - prev) : 99); 2907 prev = host->status[devidx][statptr].when; 2908 } 2909 } 2910 } 2911 2912 p += sprintf(p, "\nAttached devices:\n"); 2913 2914 shost_for_each_device(scd, instance) { 2915 p += sprintf(p, "Device/Lun TaggedQ Sync\n"); 2916 p += sprintf(p, " %d/%d ", scd->id, scd->lun); 2917 if (scd->tagged_supported) 2918 p += sprintf(p, "%3sabled(%3d) ", 2919 scd->simple_tags ? "en" : "dis", 2920 scd->current_tag); 2921 else 2922 p += sprintf(p, "unsupported "); 2923 2924 if (host->device[scd->id].sync_xfer & 15) 2925 p += sprintf(p, "offset %d, %d ns\n", 2926 host->device[scd->id].sync_xfer & 15, 2927 acornscsi_getperiod(host->device[scd->id].sync_xfer)); 2928 else 2929 p += sprintf(p, "async\n"); 2930 2931 pos = p - buffer; 2932 if (pos + begin < offset) { 2933 begin += pos; 2934 p = buffer; 2935 } 2936 pos = p - buffer; 2937 if (pos + begin > offset + length) { 2938 scsi_device_put(scd); 2939 break; 2940 } 2941 } 2942 2943 pos = p - buffer; 2944 2945 *start = buffer + (offset - begin); 2946 pos -= offset - begin; 2947 2948 if (pos > length) 2949 pos = length; 2950 2951 return pos; 2952} 2953 2954static struct scsi_host_template acornscsi_template = { 2955 .module = THIS_MODULE, 2956 .proc_info = acornscsi_proc_info, 2957 .name = "AcornSCSI", 2958 .info = acornscsi_info, 2959 .queuecommand = acornscsi_queuecmd, 2960 .eh_abort_handler = acornscsi_abort, 2961 .eh_bus_reset_handler = acornscsi_bus_reset, 2962 .can_queue = 16, 2963 .this_id = 7, 2964 .sg_tablesize = SG_ALL, 2965 .cmd_per_lun = 2, 2966 .use_clustering = DISABLE_CLUSTERING, 2967 .proc_name = "acornscsi", 2968}; 2969 2970static int __devinit 2971acornscsi_probe(struct expansion_card *ec, const struct ecard_id *id) 2972{ 2973 struct Scsi_Host *host; 2974 AS_Host *ashost; 2975 int ret = -ENOMEM; 2976 2977 host = scsi_host_alloc(&acornscsi_template, sizeof(AS_Host)); 2978 if (!host) 2979 goto out; 2980 2981 ashost = (AS_Host *)host->hostdata; 2982 2983 host->io_port = ecard_address(ec, ECARD_MEMC, 0); 2984 host->irq = ec->irq; 2985 2986 ashost->host = host; 2987 ashost->scsi.io_port = ioaddr(host->io_port + 0x800); 2988 ashost->scsi.irq = host->irq; 2989 ashost->card.io_intr = POD_SPACE(host->io_port) + 0x800; 2990 ashost->card.io_page = POD_SPACE(host->io_port) + 0xc00; 2991 ashost->card.io_ram = ioaddr(host->io_port); 2992 ashost->dma.io_port = host->io_port + 0xc00; 2993 ashost->dma.io_intr_clear = POD_SPACE(host->io_port) + 0x800; 2994 2995 ec->irqaddr = (char *)ioaddr(ashost->card.io_intr); 2996 ec->irqmask = 0x0a; 2997 2998 ret = -EBUSY; 2999 if (!request_region(host->io_port + 0x800, 2, "acornscsi(sbic)")) 3000 goto err_1; 3001 if (!request_region(ashost->card.io_intr, 1, "acornscsi(intr)")) 3002 goto err_2; 3003 if (!request_region(ashost->card.io_page, 1, "acornscsi(page)")) 3004 goto err_3; 3005#ifdef USE_DMAC 3006 if (!request_region(ashost->dma.io_port, 256, "acornscsi(dmac)")) 3007 goto err_4; 3008#endif 3009 if (!request_region(host->io_port, 2048, "acornscsi(ram)")) 3010 goto err_5; 3011 3012 ret = request_irq(host->irq, acornscsi_intr, IRQF_DISABLED, "acornscsi", ashost); 3013 if (ret) { 3014 printk(KERN_CRIT "scsi%d: IRQ%d not free: %d\n", 3015 host->host_no, ashost->scsi.irq, ret); 3016 goto err_6; 3017 } 3018 3019 memset(&ashost->stats, 0, sizeof (ashost->stats)); 3020 queue_initialise(&ashost->queues.issue); 3021 queue_initialise(&ashost->queues.disconnected); 3022 msgqueue_initialise(&ashost->scsi.msgs); 3023 3024 acornscsi_resetcard(ashost); 3025 3026 ret = scsi_add_host(host, &ec->dev); 3027 if (ret) 3028 goto err_7; 3029 3030 scsi_scan_host(host); 3031 goto out; 3032 3033 err_7: 3034 free_irq(host->irq, ashost); 3035 err_6: 3036 release_region(host->io_port, 2048); 3037 err_5: 3038#ifdef USE_DMAC 3039 release_region(ashost->dma.io_port, 256); 3040#endif 3041 err_4: 3042 release_region(ashost->card.io_page, 1); 3043 err_3: 3044 release_region(ashost->card.io_intr, 1); 3045 err_2: 3046 release_region(host->io_port + 0x800, 2); 3047 err_1: 3048 scsi_host_put(host); 3049 out: 3050 return ret; 3051} 3052 3053static void __devexit acornscsi_remove(struct expansion_card *ec) 3054{ 3055 struct Scsi_Host *host = ecard_get_drvdata(ec); 3056 AS_Host *ashost = (AS_Host *)host->hostdata; 3057 3058 ecard_set_drvdata(ec, NULL); 3059 scsi_remove_host(host); 3060 3061 /* 3062 * Put card into RESET state 3063 */ 3064 outb(0x80, ashost->card.io_page); 3065 3066 free_irq(host->irq, ashost); 3067 3068 release_region(host->io_port + 0x800, 2); 3069 release_region(ashost->card.io_intr, 1); 3070 release_region(ashost->card.io_page, 1); 3071 release_region(ashost->dma.io_port, 256); 3072 release_region(host->io_port, 2048); 3073 3074 msgqueue_free(&ashost->scsi.msgs); 3075 queue_free(&ashost->queues.disconnected); 3076 queue_free(&ashost->queues.issue); 3077 scsi_host_put(host); 3078} 3079 3080static const struct ecard_id acornscsi_cids[] = { 3081 { MANU_ACORN, PROD_ACORN_SCSI }, 3082 { 0xffff, 0xffff }, 3083}; 3084 3085static struct ecard_driver acornscsi_driver = { 3086 .probe = acornscsi_probe, 3087 .remove = __devexit_p(acornscsi_remove), 3088 .id_table = acornscsi_cids, 3089 .drv = { 3090 .name = "acornscsi", 3091 }, 3092}; 3093 3094static int __init acornscsi_init(void) 3095{ 3096 return ecard_register_driver(&acornscsi_driver); 3097} 3098 3099static void __exit acornscsi_exit(void) 3100{ 3101 ecard_remove_driver(&acornscsi_driver); 3102} 3103 3104module_init(acornscsi_init); 3105module_exit(acornscsi_exit); 3106 3107MODULE_AUTHOR("Russell King"); 3108MODULE_DESCRIPTION("AcornSCSI driver"); 3109MODULE_LICENSE("GPL"); 3110