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_scsi.c,v $ 30 * Revision 1.1.1.1 2007/08/03 18:52:56 rnuti 31 * Importing Linux MIPS Kernel 2.6.22 32 * 33 */ 34 35#include <linux/types.h> 36#include <linux/stddef.h> 37#include <linux/ctype.h> 38#include <linux/delay.h> 39 40#include <linux/module.h> 41#include <linux/signal.h> 42#include <linux/ioport.h> 43#include <linux/init.h> 44#include <linux/blkdev.h> 45#include <linux/interrupt.h> 46 47#include <asm/io.h> 48#include <asm/irq.h> 49#include <asm/system.h> 50 51#include <asm/macintosh.h> 52#include <asm/macints.h> 53#include <asm/machw.h> 54#include <asm/mac_via.h> 55 56#include "scsi.h" 57#include <scsi/scsi_host.h> 58#include "mac_scsi.h" 59#include "NCR5380.h" 60 61#define NDEBUG (NDEBUG_ABORT) 62 63#define RESET_BOOT 64#define DRIVER_SETUP 65 66extern void via_scsi_clear(void); 67 68#ifdef RESET_BOOT 69static void mac_scsi_reset_boot(struct Scsi_Host *instance); 70#endif 71 72static int setup_called = 0; 73static int setup_can_queue = -1; 74static int setup_cmd_per_lun = -1; 75static int setup_sg_tablesize = -1; 76static int setup_use_pdma = -1; 77#ifdef SUPPORT_TAGS 78static int setup_use_tagged_queuing = -1; 79#endif 80static int setup_hostid = -1; 81 82/* Time (in jiffies) to wait after a reset; the SCSI standard calls for 250ms, 83 * we usually do 0.5s to be on the safe side. But Toshiba CD-ROMs once more 84 * need ten times the standard value... */ 85#define TOSHIBA_DELAY 86 87#ifdef TOSHIBA_DELAY 88#define AFTER_RESET_DELAY (5*HZ/2) 89#else 90#define AFTER_RESET_DELAY (HZ/2) 91#endif 92 93static volatile unsigned char *mac_scsi_regp = NULL; 94static volatile unsigned char *mac_scsi_drq = NULL; 95static volatile unsigned char *mac_scsi_nodrq = NULL; 96 97 98/* 99 * NCR 5380 register access functions 100 */ 101 102 103/* Fast versions */ 104static __inline__ char macscsi_read(struct Scsi_Host *instance, int reg) 105{ 106 return in_8(instance->io_port + (reg<<4)); 107} 108 109static __inline__ void macscsi_write(struct Scsi_Host *instance, int reg, int value) 110{ 111 out_8(instance->io_port + (reg<<4), value); 112} 113 114 115/* 116 * Function : mac_scsi_setup(char *str) 117 * 118 * Purpose : booter command line initialization of the overrides array, 119 * 120 * Inputs : str - comma delimited list of options 121 * 122 */ 123 124static int __init mac_scsi_setup(char *str) { 125#ifdef DRIVER_SETUP 126 int ints[7]; 127 128 (void)get_options( str, ARRAY_SIZE(ints), ints); 129 130 if (setup_called++ || ints[0] < 1 || ints[0] > 6) { 131 printk(KERN_WARNING "scsi: <mac5380>" 132 " Usage: mac5380=<can_queue>[,<cmd_per_lun>,<sg_tablesize>,<hostid>,<use_tags>,<use_pdma>]\n"); 133 printk(KERN_ALERT "scsi: <mac5380> Bad Penguin parameters?\n"); 134 return 0; 135 } 136 137 if (ints[0] >= 1) { 138 if (ints[1] > 0) 139 /* no limits on this, just > 0 */ 140 setup_can_queue = ints[1]; 141 } 142 if (ints[0] >= 2) { 143 if (ints[2] > 0) 144 setup_cmd_per_lun = ints[2]; 145 } 146 if (ints[0] >= 3) { 147 if (ints[3] >= 0) { 148 setup_sg_tablesize = ints[3]; 149 /* Must be <= SG_ALL (255) */ 150 if (setup_sg_tablesize > SG_ALL) 151 setup_sg_tablesize = SG_ALL; 152 } 153 } 154 if (ints[0] >= 4) { 155 /* Must be between 0 and 7 */ 156 if (ints[4] >= 0 && ints[4] <= 7) 157 setup_hostid = ints[4]; 158 else if (ints[4] > 7) 159 printk(KERN_WARNING "mac_scsi_setup: invalid host ID %d !\n", ints[4] ); 160 } 161#ifdef SUPPORT_TAGS 162 if (ints[0] >= 5) { 163 if (ints[5] >= 0) 164 setup_use_tagged_queuing = !!ints[5]; 165 } 166 167 if (ints[0] == 6) { 168 if (ints[6] >= 0) 169 setup_use_pdma = ints[6]; 170 } 171#else 172 if (ints[0] == 5) { 173 if (ints[5] >= 0) 174 setup_use_pdma = ints[5]; 175 } 176#endif /* SUPPORT_TAGS */ 177 178#endif /* DRIVER_SETUP */ 179 return 1; 180} 181 182__setup("mac5380=", mac_scsi_setup); 183 184/* 185 * If you want to find the instance with (k)gdb ... 186 */ 187#if NDEBUG 188static struct Scsi_Host *default_instance; 189#endif 190 191/* 192 * Function : int macscsi_detect(struct scsi_host_template * tpnt) 193 * 194 * Purpose : initializes mac NCR5380 driver based on the 195 * command line / compile time port and irq definitions. 196 * 197 * Inputs : tpnt - template for this SCSI adapter. 198 * 199 * Returns : 1 if a host adapter was found, 0 if not. 200 * 201 */ 202 203int macscsi_detect(struct scsi_host_template * tpnt) 204{ 205 static int called = 0; 206 int flags = 0; 207 struct Scsi_Host *instance; 208 209 if (!MACH_IS_MAC || called) 210 return( 0 ); 211 212 if (macintosh_config->scsi_type != MAC_SCSI_OLD) 213 return( 0 ); 214 215 /* setup variables */ 216 tpnt->can_queue = 217 (setup_can_queue > 0) ? setup_can_queue : CAN_QUEUE; 218 tpnt->cmd_per_lun = 219 (setup_cmd_per_lun > 0) ? setup_cmd_per_lun : CMD_PER_LUN; 220 tpnt->sg_tablesize = 221 (setup_sg_tablesize >= 0) ? setup_sg_tablesize : SG_TABLESIZE; 222 223 if (setup_hostid >= 0) 224 tpnt->this_id = setup_hostid; 225 else { 226 /* use 7 as default */ 227 tpnt->this_id = 7; 228 } 229 230#ifdef SUPPORT_TAGS 231 if (setup_use_tagged_queuing < 0) 232 setup_use_tagged_queuing = USE_TAGGED_QUEUING; 233#endif 234 235 /* Once we support multiple 5380s (e.g. DuoDock) we'll do 236 something different here */ 237 instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata)); 238#if NDEBUG 239 default_instance = instance; 240#endif 241 242 if (macintosh_config->ident == MAC_MODEL_IIFX) { 243 mac_scsi_regp = via1+0x8000; 244 mac_scsi_drq = via1+0xE000; 245 mac_scsi_nodrq = via1+0xC000; 246 /* The IIFX should be able to do true DMA, but pseudo-dma doesn't work */ 247 flags = FLAG_NO_PSEUDO_DMA; 248 } else { 249 mac_scsi_regp = via1+0x10000; 250 mac_scsi_drq = via1+0x6000; 251 mac_scsi_nodrq = via1+0x12000; 252 } 253 254 if (! setup_use_pdma) 255 flags = FLAG_NO_PSEUDO_DMA; 256 257 instance->io_port = (unsigned long) mac_scsi_regp; 258 instance->irq = IRQ_MAC_SCSI; 259 260#ifdef RESET_BOOT 261 mac_scsi_reset_boot(instance); 262#endif 263 264 NCR5380_init(instance, flags); 265 266 instance->n_io_port = 255; 267 268 ((struct NCR5380_hostdata *)instance->hostdata)->ctrl = 0; 269 270 if (instance->irq != SCSI_IRQ_NONE) 271 if (request_irq(instance->irq, NCR5380_intr, IRQ_FLG_SLOW, 272 "ncr5380", instance)) { 273 printk(KERN_WARNING "scsi%d: IRQ%d not free, interrupts disabled\n", 274 instance->host_no, instance->irq); 275 instance->irq = SCSI_IRQ_NONE; 276 } 277 278 printk(KERN_INFO "scsi%d: generic 5380 at port %lX irq", instance->host_no, instance->io_port); 279 if (instance->irq == SCSI_IRQ_NONE) 280 printk (KERN_INFO "s disabled"); 281 else 282 printk (KERN_INFO " %d", instance->irq); 283 printk(KERN_INFO " options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", 284 instance->can_queue, instance->cmd_per_lun, MACSCSI_PUBLIC_RELEASE); 285 printk(KERN_INFO "\nscsi%d:", instance->host_no); 286 NCR5380_print_options(instance); 287 printk("\n"); 288 called = 1; 289 return 1; 290} 291 292int macscsi_release (struct Scsi_Host *shpnt) 293{ 294 if (shpnt->irq != SCSI_IRQ_NONE) 295 free_irq (shpnt->irq, NCR5380_intr); 296 NCR5380_exit(shpnt); 297 298 return 0; 299} 300 301#ifdef RESET_BOOT 302/* 303 * Our 'bus reset on boot' function 304 */ 305 306static void mac_scsi_reset_boot(struct Scsi_Host *instance) 307{ 308 unsigned long end; 309 310 NCR5380_local_declare(); 311 NCR5380_setup(instance); 312 313 /* 314 * Do a SCSI reset to clean up the bus during initialization. No messing 315 * with the queues, interrupts, or locks necessary here. 316 */ 317 318 printk(KERN_INFO "Macintosh SCSI: resetting the SCSI bus..." ); 319 320 /* switch off SCSI IRQ - catch an interrupt without IRQ bit set else */ 321 disable_irq(IRQ_MAC_SCSI); 322 323 /* get in phase */ 324 NCR5380_write( TARGET_COMMAND_REG, 325 PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) )); 326 327 /* assert RST */ 328 NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST ); 329 /* The min. reset hold time is 25us, so 40us should be enough */ 330 udelay( 50 ); 331 /* reset RST and interrupt */ 332 NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE ); 333 NCR5380_read( RESET_PARITY_INTERRUPT_REG ); 334 335 for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); ) 336 barrier(); 337 338 /* switch on SCSI IRQ again */ 339 enable_irq(IRQ_MAC_SCSI); 340 341 printk(KERN_INFO " done\n" ); 342} 343#endif 344 345const char * macscsi_info (struct Scsi_Host *spnt) { 346 return ""; 347} 348 349 350#define CP_IO_TO_MEM(s,d,len) \ 351__asm__ __volatile__ \ 352 (" cmp.w #4,%2\n" \ 353 " bls 8f\n" \ 354 " move.w %1,%%d0\n" \ 355 " neg.b %%d0\n" \ 356 " and.w #3,%%d0\n" \ 357 " sub.w %%d0,%2\n" \ 358 " bra 2f\n" \ 359 " 1: move.b (%0),(%1)+\n" \ 360 " 2: dbf %%d0,1b\n" \ 361 " move.w %2,%%d0\n" \ 362 " lsr.w #5,%%d0\n" \ 363 " bra 4f\n" \ 364 " 3: move.l (%0),(%1)+\n" \ 365 "31: move.l (%0),(%1)+\n" \ 366 "32: move.l (%0),(%1)+\n" \ 367 "33: move.l (%0),(%1)+\n" \ 368 "34: move.l (%0),(%1)+\n" \ 369 "35: move.l (%0),(%1)+\n" \ 370 "36: move.l (%0),(%1)+\n" \ 371 "37: move.l (%0),(%1)+\n" \ 372 " 4: dbf %%d0,3b\n" \ 373 " move.w %2,%%d0\n" \ 374 " lsr.w #2,%%d0\n" \ 375 " and.w #7,%%d0\n" \ 376 " bra 6f\n" \ 377 " 5: move.l (%0),(%1)+\n" \ 378 " 6: dbf %%d0,5b\n" \ 379 " and.w #3,%2\n" \ 380 " bra 8f\n" \ 381 " 7: move.b (%0),(%1)+\n" \ 382 " 8: dbf %2,7b\n" \ 383 " moveq.l #0, %2\n" \ 384 " 9: \n" \ 385 ".section .fixup,\"ax\"\n" \ 386 " .even\n" \ 387 "90: moveq.l #1, %2\n" \ 388 " jra 9b\n" \ 389 ".previous\n" \ 390 ".section __ex_table,\"a\"\n" \ 391 " .align 4\n" \ 392 " .long 1b,90b\n" \ 393 " .long 3b,90b\n" \ 394 " .long 31b,90b\n" \ 395 " .long 32b,90b\n" \ 396 " .long 33b,90b\n" \ 397 " .long 34b,90b\n" \ 398 " .long 35b,90b\n" \ 399 " .long 36b,90b\n" \ 400 " .long 37b,90b\n" \ 401 " .long 5b,90b\n" \ 402 " .long 7b,90b\n" \ 403 ".previous" \ 404 : "=a"(s), "=a"(d), "=d"(len) \ 405 : "0"(s), "1"(d), "2"(len) \ 406 : "d0") 407 408 409static int macscsi_pread (struct Scsi_Host *instance, 410 unsigned char *dst, int len) 411{ 412 unsigned char *d; 413 volatile unsigned char *s; 414 415 NCR5380_local_declare(); 416 NCR5380_setup(instance); 417 418 s = mac_scsi_drq+0x60; 419 d = dst; 420 421/* These conditions are derived from MacOS */ 422 423 while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) 424 && !(NCR5380_read(STATUS_REG) & SR_REQ)) 425 ; 426 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) 427 && (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)) { 428 printk(KERN_ERR "Error in macscsi_pread\n"); 429 return -1; 430 } 431 432 CP_IO_TO_MEM(s, d, len); 433 434 if (len != 0) { 435 printk(KERN_NOTICE "Bus error in macscsi_pread\n"); 436 return -1; 437 } 438 439 return 0; 440} 441 442 443#define CP_MEM_TO_IO(s,d,len) \ 444__asm__ __volatile__ \ 445 (" cmp.w #4,%2\n" \ 446 " bls 8f\n" \ 447 " move.w %0,%%d0\n" \ 448 " neg.b %%d0\n" \ 449 " and.w #3,%%d0\n" \ 450 " sub.w %%d0,%2\n" \ 451 " bra 2f\n" \ 452 " 1: move.b (%0)+,(%1)\n" \ 453 " 2: dbf %%d0,1b\n" \ 454 " move.w %2,%%d0\n" \ 455 " lsr.w #5,%%d0\n" \ 456 " bra 4f\n" \ 457 " 3: move.l (%0)+,(%1)\n" \ 458 "31: move.l (%0)+,(%1)\n" \ 459 "32: move.l (%0)+,(%1)\n" \ 460 "33: move.l (%0)+,(%1)\n" \ 461 "34: move.l (%0)+,(%1)\n" \ 462 "35: move.l (%0)+,(%1)\n" \ 463 "36: move.l (%0)+,(%1)\n" \ 464 "37: move.l (%0)+,(%1)\n" \ 465 " 4: dbf %%d0,3b\n" \ 466 " move.w %2,%%d0\n" \ 467 " lsr.w #2,%%d0\n" \ 468 " and.w #7,%%d0\n" \ 469 " bra 6f\n" \ 470 " 5: move.l (%0)+,(%1)\n" \ 471 " 6: dbf %%d0,5b\n" \ 472 " and.w #3,%2\n" \ 473 " bra 8f\n" \ 474 " 7: move.b (%0)+,(%1)\n" \ 475 " 8: dbf %2,7b\n" \ 476 " moveq.l #0, %2\n" \ 477 " 9: \n" \ 478 ".section .fixup,\"ax\"\n" \ 479 " .even\n" \ 480 "90: moveq.l #1, %2\n" \ 481 " jra 9b\n" \ 482 ".previous\n" \ 483 ".section __ex_table,\"a\"\n" \ 484 " .align 4\n" \ 485 " .long 1b,90b\n" \ 486 " .long 3b,90b\n" \ 487 " .long 31b,90b\n" \ 488 " .long 32b,90b\n" \ 489 " .long 33b,90b\n" \ 490 " .long 34b,90b\n" \ 491 " .long 35b,90b\n" \ 492 " .long 36b,90b\n" \ 493 " .long 37b,90b\n" \ 494 " .long 5b,90b\n" \ 495 " .long 7b,90b\n" \ 496 ".previous" \ 497 : "=a"(s), "=a"(d), "=d"(len) \ 498 : "0"(s), "1"(d), "2"(len) \ 499 : "d0") 500 501static int macscsi_pwrite (struct Scsi_Host *instance, 502 unsigned char *src, int len) 503{ 504 unsigned char *s; 505 volatile unsigned char *d; 506 507 NCR5380_local_declare(); 508 NCR5380_setup(instance); 509 510 s = src; 511 d = mac_scsi_drq; 512 513/* These conditions are derived from MacOS */ 514 515 while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) 516 && (!(NCR5380_read(STATUS_REG) & SR_REQ) 517 || (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH))) 518 ; 519 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ)) { 520 printk(KERN_ERR "Error in macscsi_pwrite\n"); 521 return -1; 522 } 523 524 CP_MEM_TO_IO(s, d, len); 525 526 if (len != 0) { 527 printk(KERN_NOTICE "Bus error in macscsi_pwrite\n"); 528 return -1; 529 } 530 531 return 0; 532} 533 534 535/* These control the behaviour of the generic 5380 core */ 536#define AUTOSENSE 537#define PSEUDO_DMA 538 539#include "NCR5380.c" 540 541static struct scsi_host_template driver_template = { 542 .proc_name = "Mac5380", 543 .proc_info = macscsi_proc_info, 544 .name = "Macintosh NCR5380 SCSI", 545 .detect = macscsi_detect, 546 .release = macscsi_release, 547 .info = macscsi_info, 548 .queuecommand = macscsi_queue_command, 549 .eh_abort_handler = macscsi_abort, 550 .eh_bus_reset_handler = macscsi_bus_reset, 551 .can_queue = CAN_QUEUE, 552 .this_id = 7, 553 .sg_tablesize = SG_ALL, 554 .cmd_per_lun = CMD_PER_LUN, 555 .unchecked_isa_dma = 0, 556 .use_clustering = DISABLE_CLUSTERING 557}; 558 559 560#include "scsi_module.c" 561