1/* 2 * Generic Macintosh NCR5380 driver 3 * 4 * Copyright 1998, Michael Schmitz <mschmitz@lbl.gov> 5 * 6 * derived in part from: 7 */ 8/* 9 * Generic Generic NCR5380 driver 10 * 11 * Copyright 1995, Russell King 12 * 13 * ALPHA RELEASE 1. 14 * 15 * For more information, please consult 16 * 17 * NCR 5380 Family 18 * SCSI Protocol Controller 19 * Databook 20 * 21 * NCR Microelectronics 22 * 1635 Aeroplaza Drive 23 * Colorado Springs, CO 80916 24 * 1+ (719) 578-3400 25 * 1+ (800) 334-5454 26 */ 27 28/* 29 * $Log: mac_NCR5380.c,v $ 30 */ 31 32#include <linux/types.h> 33#include <linux/stddef.h> 34#include <linux/ctype.h> 35#include <linux/delay.h> 36 37#include <linux/module.h> 38#include <linux/signal.h> 39#include <linux/ioport.h> 40#include <linux/init.h> 41#include <linux/blkdev.h> 42#include <linux/interrupt.h> 43 44#include <asm/io.h> 45#include <asm/irq.h> 46#include <asm/system.h> 47 48#include <asm/macintosh.h> 49#include <asm/macints.h> 50#include <asm/mac_via.h> 51 52#include "scsi.h" 53#include <scsi/scsi_host.h> 54#include "mac_scsi.h" 55 56/* These control the behaviour of the generic 5380 core */ 57#define AUTOSENSE 58#define PSEUDO_DMA 59 60#include "NCR5380.h" 61 62#define NDEBUG (NDEBUG_ABORT) 63 64#define RESET_BOOT 65#define DRIVER_SETUP 66 67extern void via_scsi_clear(void); 68 69#ifdef RESET_BOOT 70static void mac_scsi_reset_boot(struct Scsi_Host *instance); 71#endif 72 73static int setup_called = 0; 74static int setup_can_queue = -1; 75static int setup_cmd_per_lun = -1; 76static int setup_sg_tablesize = -1; 77static int setup_use_pdma = -1; 78#ifdef SUPPORT_TAGS 79static int setup_use_tagged_queuing = -1; 80#endif 81static int setup_hostid = -1; 82 83/* Time (in jiffies) to wait after a reset; the SCSI standard calls for 250ms, 84 * we usually do 0.5s to be on the safe side. But Toshiba CD-ROMs once more 85 * need ten times the standard value... */ 86#define TOSHIBA_DELAY 87 88#ifdef TOSHIBA_DELAY 89#define AFTER_RESET_DELAY (5*HZ/2) 90#else 91#define AFTER_RESET_DELAY (HZ/2) 92#endif 93 94static volatile unsigned char *mac_scsi_regp = NULL; 95static volatile unsigned char *mac_scsi_drq = NULL; 96static volatile unsigned char *mac_scsi_nodrq = NULL; 97 98 99/* 100 * NCR 5380 register access functions 101 */ 102 103 104/* Fast versions */ 105static __inline__ char macscsi_read(struct Scsi_Host *instance, int reg) 106{ 107 return in_8(instance->io_port + (reg<<4)); 108} 109 110static __inline__ void macscsi_write(struct Scsi_Host *instance, int reg, int value) 111{ 112 out_8(instance->io_port + (reg<<4), value); 113} 114 115 116/* 117 * Function : mac_scsi_setup(char *str) 118 * 119 * Purpose : booter command line initialization of the overrides array, 120 * 121 * Inputs : str - comma delimited list of options 122 * 123 */ 124 125static int __init mac_scsi_setup(char *str) { 126#ifdef DRIVER_SETUP 127 int ints[7]; 128 129 (void)get_options( str, ARRAY_SIZE(ints), ints); 130 131 if (setup_called++ || ints[0] < 1 || ints[0] > 6) { 132 printk(KERN_WARNING "scsi: <mac5380>" 133 " Usage: mac5380=<can_queue>[,<cmd_per_lun>,<sg_tablesize>,<hostid>,<use_tags>,<use_pdma>]\n"); 134 printk(KERN_ALERT "scsi: <mac5380> Bad Penguin parameters?\n"); 135 return 0; 136 } 137 138 if (ints[0] >= 1) { 139 if (ints[1] > 0) 140 /* no limits on this, just > 0 */ 141 setup_can_queue = ints[1]; 142 } 143 if (ints[0] >= 2) { 144 if (ints[2] > 0) 145 setup_cmd_per_lun = ints[2]; 146 } 147 if (ints[0] >= 3) { 148 if (ints[3] >= 0) { 149 setup_sg_tablesize = ints[3]; 150 /* Must be <= SG_ALL (255) */ 151 if (setup_sg_tablesize > SG_ALL) 152 setup_sg_tablesize = SG_ALL; 153 } 154 } 155 if (ints[0] >= 4) { 156 /* Must be between 0 and 7 */ 157 if (ints[4] >= 0 && ints[4] <= 7) 158 setup_hostid = ints[4]; 159 else if (ints[4] > 7) 160 printk(KERN_WARNING "mac_scsi_setup: invalid host ID %d !\n", ints[4] ); 161 } 162#ifdef SUPPORT_TAGS 163 if (ints[0] >= 5) { 164 if (ints[5] >= 0) 165 setup_use_tagged_queuing = !!ints[5]; 166 } 167 168 if (ints[0] == 6) { 169 if (ints[6] >= 0) 170 setup_use_pdma = ints[6]; 171 } 172#else 173 if (ints[0] == 5) { 174 if (ints[5] >= 0) 175 setup_use_pdma = ints[5]; 176 } 177#endif /* SUPPORT_TAGS */ 178 179#endif /* DRIVER_SETUP */ 180 return 1; 181} 182 183__setup("mac5380=", mac_scsi_setup); 184 185/* 186 * If you want to find the instance with (k)gdb ... 187 */ 188#if NDEBUG 189static struct Scsi_Host *default_instance; 190#endif 191 192/* 193 * Function : int macscsi_detect(struct scsi_host_template * tpnt) 194 * 195 * Purpose : initializes mac NCR5380 driver based on the 196 * command line / compile time port and irq definitions. 197 * 198 * Inputs : tpnt - template for this SCSI adapter. 199 * 200 * Returns : 1 if a host adapter was found, 0 if not. 201 * 202 */ 203 204int macscsi_detect(struct scsi_host_template * tpnt) 205{ 206 static int called = 0; 207 int flags = 0; 208 struct Scsi_Host *instance; 209 210 if (!MACH_IS_MAC || called) 211 return( 0 ); 212 213 if (macintosh_config->scsi_type != MAC_SCSI_OLD) 214 return( 0 ); 215 216 /* setup variables */ 217 tpnt->can_queue = 218 (setup_can_queue > 0) ? setup_can_queue : CAN_QUEUE; 219 tpnt->cmd_per_lun = 220 (setup_cmd_per_lun > 0) ? setup_cmd_per_lun : CMD_PER_LUN; 221 tpnt->sg_tablesize = 222 (setup_sg_tablesize >= 0) ? setup_sg_tablesize : SG_TABLESIZE; 223 224 if (setup_hostid >= 0) 225 tpnt->this_id = setup_hostid; 226 else { 227 /* use 7 as default */ 228 tpnt->this_id = 7; 229 } 230 231#ifdef SUPPORT_TAGS 232 if (setup_use_tagged_queuing < 0) 233 setup_use_tagged_queuing = USE_TAGGED_QUEUING; 234#endif 235 236 /* Once we support multiple 5380s (e.g. DuoDock) we'll do 237 something different here */ 238 instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata)); 239#if NDEBUG 240 default_instance = instance; 241#endif 242 243 if (macintosh_config->ident == MAC_MODEL_IIFX) { 244 mac_scsi_regp = via1+0x8000; 245 mac_scsi_drq = via1+0xE000; 246 mac_scsi_nodrq = via1+0xC000; 247 /* The IIFX should be able to do true DMA, but pseudo-dma doesn't work */ 248 flags = FLAG_NO_PSEUDO_DMA; 249 } else { 250 mac_scsi_regp = via1+0x10000; 251 mac_scsi_drq = via1+0x6000; 252 mac_scsi_nodrq = via1+0x12000; 253 } 254 255 if (! setup_use_pdma) 256 flags = FLAG_NO_PSEUDO_DMA; 257 258 instance->io_port = (unsigned long) mac_scsi_regp; 259 instance->irq = IRQ_MAC_SCSI; 260 261#ifdef RESET_BOOT 262 mac_scsi_reset_boot(instance); 263#endif 264 265 NCR5380_init(instance, flags); 266 267 instance->n_io_port = 255; 268 269 ((struct NCR5380_hostdata *)instance->hostdata)->ctrl = 0; 270 271 if (instance->irq != SCSI_IRQ_NONE) 272 if (request_irq(instance->irq, NCR5380_intr, IRQ_FLG_SLOW, 273 "ncr5380", instance)) { 274 printk(KERN_WARNING "scsi%d: IRQ%d not free, interrupts disabled\n", 275 instance->host_no, instance->irq); 276 instance->irq = SCSI_IRQ_NONE; 277 } 278 279 printk(KERN_INFO "scsi%d: generic 5380 at port %lX irq", instance->host_no, instance->io_port); 280 if (instance->irq == SCSI_IRQ_NONE) 281 printk (KERN_INFO "s disabled"); 282 else 283 printk (KERN_INFO " %d", instance->irq); 284 printk(KERN_INFO " options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", 285 instance->can_queue, instance->cmd_per_lun, MACSCSI_PUBLIC_RELEASE); 286 printk(KERN_INFO "\nscsi%d:", instance->host_no); 287 NCR5380_print_options(instance); 288 printk("\n"); 289 called = 1; 290 return 1; 291} 292 293int macscsi_release (struct Scsi_Host *shpnt) 294{ 295 if (shpnt->irq != SCSI_IRQ_NONE) 296 free_irq(shpnt->irq, shpnt); 297 NCR5380_exit(shpnt); 298 299 return 0; 300} 301 302#ifdef RESET_BOOT 303/* 304 * Our 'bus reset on boot' function 305 */ 306 307static void mac_scsi_reset_boot(struct Scsi_Host *instance) 308{ 309 unsigned long end; 310 311 NCR5380_local_declare(); 312 NCR5380_setup(instance); 313 314 /* 315 * Do a SCSI reset to clean up the bus during initialization. No messing 316 * with the queues, interrupts, or locks necessary here. 317 */ 318 319 printk(KERN_INFO "Macintosh SCSI: resetting the SCSI bus..." ); 320 321 /* switch off SCSI IRQ - catch an interrupt without IRQ bit set else */ 322 disable_irq(IRQ_MAC_SCSI); 323 324 /* get in phase */ 325 NCR5380_write( TARGET_COMMAND_REG, 326 PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) )); 327 328 /* assert RST */ 329 NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST ); 330 /* The min. reset hold time is 25us, so 40us should be enough */ 331 udelay( 50 ); 332 /* reset RST and interrupt */ 333 NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE ); 334 NCR5380_read( RESET_PARITY_INTERRUPT_REG ); 335 336 for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); ) 337 barrier(); 338 339 /* switch on SCSI IRQ again */ 340 enable_irq(IRQ_MAC_SCSI); 341 342 printk(KERN_INFO " done\n" ); 343} 344#endif 345 346const char * macscsi_info (struct Scsi_Host *spnt) { 347 return ""; 348} 349 350 351#define CP_IO_TO_MEM(s,d,len) \ 352__asm__ __volatile__ \ 353 (" cmp.w #4,%2\n" \ 354 " bls 8f\n" \ 355 " move.w %1,%%d0\n" \ 356 " neg.b %%d0\n" \ 357 " and.w #3,%%d0\n" \ 358 " sub.w %%d0,%2\n" \ 359 " bra 2f\n" \ 360 " 1: move.b (%0),(%1)+\n" \ 361 " 2: dbf %%d0,1b\n" \ 362 " move.w %2,%%d0\n" \ 363 " lsr.w #5,%%d0\n" \ 364 " bra 4f\n" \ 365 " 3: move.l (%0),(%1)+\n" \ 366 "31: move.l (%0),(%1)+\n" \ 367 "32: move.l (%0),(%1)+\n" \ 368 "33: move.l (%0),(%1)+\n" \ 369 "34: move.l (%0),(%1)+\n" \ 370 "35: move.l (%0),(%1)+\n" \ 371 "36: move.l (%0),(%1)+\n" \ 372 "37: move.l (%0),(%1)+\n" \ 373 " 4: dbf %%d0,3b\n" \ 374 " move.w %2,%%d0\n" \ 375 " lsr.w #2,%%d0\n" \ 376 " and.w #7,%%d0\n" \ 377 " bra 6f\n" \ 378 " 5: move.l (%0),(%1)+\n" \ 379 " 6: dbf %%d0,5b\n" \ 380 " and.w #3,%2\n" \ 381 " bra 8f\n" \ 382 " 7: move.b (%0),(%1)+\n" \ 383 " 8: dbf %2,7b\n" \ 384 " moveq.l #0, %2\n" \ 385 " 9: \n" \ 386 ".section .fixup,\"ax\"\n" \ 387 " .even\n" \ 388 "90: moveq.l #1, %2\n" \ 389 " jra 9b\n" \ 390 ".previous\n" \ 391 ".section __ex_table,\"a\"\n" \ 392 " .align 4\n" \ 393 " .long 1b,90b\n" \ 394 " .long 3b,90b\n" \ 395 " .long 31b,90b\n" \ 396 " .long 32b,90b\n" \ 397 " .long 33b,90b\n" \ 398 " .long 34b,90b\n" \ 399 " .long 35b,90b\n" \ 400 " .long 36b,90b\n" \ 401 " .long 37b,90b\n" \ 402 " .long 5b,90b\n" \ 403 " .long 7b,90b\n" \ 404 ".previous" \ 405 : "=a"(s), "=a"(d), "=d"(len) \ 406 : "0"(s), "1"(d), "2"(len) \ 407 : "d0") 408 409 410static int macscsi_pread (struct Scsi_Host *instance, 411 unsigned char *dst, int len) 412{ 413 unsigned char *d; 414 volatile unsigned char *s; 415 416 NCR5380_local_declare(); 417 NCR5380_setup(instance); 418 419 s = mac_scsi_drq+0x60; 420 d = dst; 421 422/* These conditions are derived from MacOS */ 423 424 while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) 425 && !(NCR5380_read(STATUS_REG) & SR_REQ)) 426 ; 427 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) 428 && (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)) { 429 printk(KERN_ERR "Error in macscsi_pread\n"); 430 return -1; 431 } 432 433 CP_IO_TO_MEM(s, d, len); 434 435 if (len != 0) { 436 printk(KERN_NOTICE "Bus error in macscsi_pread\n"); 437 return -1; 438 } 439 440 return 0; 441} 442 443 444#define CP_MEM_TO_IO(s,d,len) \ 445__asm__ __volatile__ \ 446 (" cmp.w #4,%2\n" \ 447 " bls 8f\n" \ 448 " move.w %0,%%d0\n" \ 449 " neg.b %%d0\n" \ 450 " and.w #3,%%d0\n" \ 451 " sub.w %%d0,%2\n" \ 452 " bra 2f\n" \ 453 " 1: move.b (%0)+,(%1)\n" \ 454 " 2: dbf %%d0,1b\n" \ 455 " move.w %2,%%d0\n" \ 456 " lsr.w #5,%%d0\n" \ 457 " bra 4f\n" \ 458 " 3: move.l (%0)+,(%1)\n" \ 459 "31: move.l (%0)+,(%1)\n" \ 460 "32: move.l (%0)+,(%1)\n" \ 461 "33: move.l (%0)+,(%1)\n" \ 462 "34: move.l (%0)+,(%1)\n" \ 463 "35: move.l (%0)+,(%1)\n" \ 464 "36: move.l (%0)+,(%1)\n" \ 465 "37: move.l (%0)+,(%1)\n" \ 466 " 4: dbf %%d0,3b\n" \ 467 " move.w %2,%%d0\n" \ 468 " lsr.w #2,%%d0\n" \ 469 " and.w #7,%%d0\n" \ 470 " bra 6f\n" \ 471 " 5: move.l (%0)+,(%1)\n" \ 472 " 6: dbf %%d0,5b\n" \ 473 " and.w #3,%2\n" \ 474 " bra 8f\n" \ 475 " 7: move.b (%0)+,(%1)\n" \ 476 " 8: dbf %2,7b\n" \ 477 " moveq.l #0, %2\n" \ 478 " 9: \n" \ 479 ".section .fixup,\"ax\"\n" \ 480 " .even\n" \ 481 "90: moveq.l #1, %2\n" \ 482 " jra 9b\n" \ 483 ".previous\n" \ 484 ".section __ex_table,\"a\"\n" \ 485 " .align 4\n" \ 486 " .long 1b,90b\n" \ 487 " .long 3b,90b\n" \ 488 " .long 31b,90b\n" \ 489 " .long 32b,90b\n" \ 490 " .long 33b,90b\n" \ 491 " .long 34b,90b\n" \ 492 " .long 35b,90b\n" \ 493 " .long 36b,90b\n" \ 494 " .long 37b,90b\n" \ 495 " .long 5b,90b\n" \ 496 " .long 7b,90b\n" \ 497 ".previous" \ 498 : "=a"(s), "=a"(d), "=d"(len) \ 499 : "0"(s), "1"(d), "2"(len) \ 500 : "d0") 501 502static int macscsi_pwrite (struct Scsi_Host *instance, 503 unsigned char *src, int len) 504{ 505 unsigned char *s; 506 volatile unsigned char *d; 507 508 NCR5380_local_declare(); 509 NCR5380_setup(instance); 510 511 s = src; 512 d = mac_scsi_drq; 513 514/* These conditions are derived from MacOS */ 515 516 while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) 517 && (!(NCR5380_read(STATUS_REG) & SR_REQ) 518 || (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH))) 519 ; 520 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ)) { 521 printk(KERN_ERR "Error in macscsi_pwrite\n"); 522 return -1; 523 } 524 525 CP_MEM_TO_IO(s, d, len); 526 527 if (len != 0) { 528 printk(KERN_NOTICE "Bus error in macscsi_pwrite\n"); 529 return -1; 530 } 531 532 return 0; 533} 534 535 536#include "NCR5380.c" 537 538static struct scsi_host_template driver_template = { 539 .proc_name = "Mac5380", 540 .proc_info = macscsi_proc_info, 541 .name = "Macintosh NCR5380 SCSI", 542 .detect = macscsi_detect, 543 .release = macscsi_release, 544 .info = macscsi_info, 545 .queuecommand = macscsi_queue_command, 546 .eh_abort_handler = macscsi_abort, 547 .eh_bus_reset_handler = macscsi_bus_reset, 548 .can_queue = CAN_QUEUE, 549 .this_id = 7, 550 .sg_tablesize = SG_ALL, 551 .cmd_per_lun = CMD_PER_LUN, 552 .use_clustering = DISABLE_CLUSTERING 553}; 554 555 556#include "scsi_module.c" 557