Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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/sched.h> |
| 40 | #include <linux/ioport.h> |
| 41 | #include <linux/init.h> |
| 42 | #include <linux/blkdev.h> |
| 43 | #include <linux/interrupt.h> |
| 44 | |
| 45 | #include <asm/io.h> |
| 46 | #include <asm/irq.h> |
| 47 | #include <asm/system.h> |
| 48 | |
| 49 | #include <asm/macintosh.h> |
| 50 | #include <asm/macints.h> |
| 51 | #include <asm/machw.h> |
| 52 | #include <asm/mac_via.h> |
| 53 | |
| 54 | #include "scsi.h" |
| 55 | #include <scsi/scsi_host.h> |
| 56 | #include "mac_scsi.h" |
| 57 | #include "NCR5380.h" |
| 58 | |
| 59 | #if 0 |
| 60 | #define NDEBUG (NDEBUG_INTR | NDEBUG_PSEUDO_DMA | NDEBUG_ARBITRATION | NDEBUG_SELECTION | NDEBUG_RESELECTION) |
| 61 | #else |
| 62 | #define NDEBUG (NDEBUG_ABORT) |
| 63 | #endif |
| 64 | |
| 65 | #define RESET_BOOT |
| 66 | #define DRIVER_SETUP |
| 67 | |
| 68 | #define ENABLE_IRQ() mac_enable_irq( IRQ_MAC_SCSI ); |
| 69 | #define DISABLE_IRQ() mac_disable_irq( IRQ_MAC_SCSI ); |
| 70 | |
| 71 | extern void via_scsi_clear(void); |
| 72 | |
| 73 | #ifdef RESET_BOOT |
| 74 | static void mac_scsi_reset_boot(struct Scsi_Host *instance); |
| 75 | #endif |
| 76 | |
| 77 | static int setup_called = 0; |
| 78 | static int setup_can_queue = -1; |
| 79 | static int setup_cmd_per_lun = -1; |
| 80 | static int setup_sg_tablesize = -1; |
| 81 | static int setup_use_pdma = -1; |
| 82 | #ifdef SUPPORT_TAGS |
| 83 | static int setup_use_tagged_queuing = -1; |
| 84 | #endif |
| 85 | static int setup_hostid = -1; |
| 86 | |
| 87 | /* Time (in jiffies) to wait after a reset; the SCSI standard calls for 250ms, |
| 88 | * we usually do 0.5s to be on the safe side. But Toshiba CD-ROMs once more |
| 89 | * need ten times the standard value... */ |
| 90 | #define TOSHIBA_DELAY |
| 91 | |
| 92 | #ifdef TOSHIBA_DELAY |
| 93 | #define AFTER_RESET_DELAY (5*HZ/2) |
| 94 | #else |
| 95 | #define AFTER_RESET_DELAY (HZ/2) |
| 96 | #endif |
| 97 | |
| 98 | static volatile unsigned char *mac_scsi_regp = NULL; |
| 99 | static volatile unsigned char *mac_scsi_drq = NULL; |
| 100 | static volatile unsigned char *mac_scsi_nodrq = NULL; |
| 101 | |
| 102 | |
| 103 | /* |
| 104 | * NCR 5380 register access functions |
| 105 | */ |
| 106 | |
| 107 | #if 0 |
| 108 | /* Debug versions */ |
| 109 | #define CTRL(p,v) (*ctrl = (v)) |
| 110 | |
| 111 | static char macscsi_read(struct Scsi_Host *instance, int reg) |
| 112 | { |
| 113 | int iobase = instance->io_port; |
| 114 | int i; |
| 115 | int *ctrl = &((struct NCR5380_hostdata *)instance->hostdata)->ctrl; |
| 116 | |
| 117 | CTRL(iobase, 0); |
| 118 | i = in_8(iobase + (reg<<4)); |
| 119 | CTRL(iobase, 0x40); |
| 120 | |
| 121 | return i; |
| 122 | } |
| 123 | |
| 124 | static void macscsi_write(struct Scsi_Host *instance, int reg, int value) |
| 125 | { |
| 126 | int iobase = instance->io_port; |
| 127 | int *ctrl = &((struct NCR5380_hostdata *)instance->hostdata)->ctrl; |
| 128 | |
| 129 | CTRL(iobase, 0); |
| 130 | out_8(iobase + (reg<<4), value); |
| 131 | CTRL(iobase, 0x40); |
| 132 | } |
| 133 | #else |
| 134 | |
| 135 | /* Fast versions */ |
| 136 | static __inline__ char macscsi_read(struct Scsi_Host *instance, int reg) |
| 137 | { |
| 138 | return in_8(instance->io_port + (reg<<4)); |
| 139 | } |
| 140 | |
| 141 | static __inline__ void macscsi_write(struct Scsi_Host *instance, int reg, int value) |
| 142 | { |
| 143 | out_8(instance->io_port + (reg<<4), value); |
| 144 | } |
| 145 | #endif |
| 146 | |
| 147 | |
| 148 | /* |
| 149 | * Function : mac_scsi_setup(char *str) |
| 150 | * |
| 151 | * Purpose : booter command line initialization of the overrides array, |
| 152 | * |
| 153 | * Inputs : str - comma delimited list of options |
| 154 | * |
| 155 | */ |
| 156 | |
| 157 | static int __init mac_scsi_setup(char *str) { |
| 158 | #ifdef DRIVER_SETUP |
| 159 | int ints[7]; |
| 160 | |
| 161 | (void)get_options( str, ARRAY_SIZE(ints), ints); |
| 162 | |
| 163 | if (setup_called++ || ints[0] < 1 || ints[0] > 6) { |
| 164 | printk(KERN_WARNING "scsi: <mac5380>" |
| 165 | " Usage: mac5380=<can_queue>[,<cmd_per_lun>,<sg_tablesize>,<hostid>,<use_tags>,<use_pdma>]\n"); |
| 166 | printk(KERN_ALERT "scsi: <mac5380> Bad Penguin parameters?\n"); |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | if (ints[0] >= 1) { |
| 171 | if (ints[1] > 0) |
| 172 | /* no limits on this, just > 0 */ |
| 173 | setup_can_queue = ints[1]; |
| 174 | } |
| 175 | if (ints[0] >= 2) { |
| 176 | if (ints[2] > 0) |
| 177 | setup_cmd_per_lun = ints[2]; |
| 178 | } |
| 179 | if (ints[0] >= 3) { |
| 180 | if (ints[3] >= 0) { |
| 181 | setup_sg_tablesize = ints[3]; |
| 182 | /* Must be <= SG_ALL (255) */ |
| 183 | if (setup_sg_tablesize > SG_ALL) |
| 184 | setup_sg_tablesize = SG_ALL; |
| 185 | } |
| 186 | } |
| 187 | if (ints[0] >= 4) { |
| 188 | /* Must be between 0 and 7 */ |
| 189 | if (ints[4] >= 0 && ints[4] <= 7) |
| 190 | setup_hostid = ints[4]; |
| 191 | else if (ints[4] > 7) |
| 192 | printk(KERN_WARNING "mac_scsi_setup: invalid host ID %d !\n", ints[4] ); |
| 193 | } |
| 194 | #ifdef SUPPORT_TAGS |
| 195 | if (ints[0] >= 5) { |
| 196 | if (ints[5] >= 0) |
| 197 | setup_use_tagged_queuing = !!ints[5]; |
| 198 | } |
| 199 | |
| 200 | if (ints[0] == 6) { |
| 201 | if (ints[6] >= 0) |
| 202 | setup_use_pdma = ints[6]; |
| 203 | } |
| 204 | #else |
| 205 | if (ints[0] == 5) { |
| 206 | if (ints[5] >= 0) |
| 207 | setup_use_pdma = ints[5]; |
| 208 | } |
| 209 | #endif /* SUPPORT_TAGS */ |
| 210 | |
| 211 | #endif /* DRIVER_SETUP */ |
| 212 | return 1; |
| 213 | } |
| 214 | |
| 215 | __setup("mac5380=", mac_scsi_setup); |
| 216 | |
| 217 | /* |
| 218 | * If you want to find the instance with (k)gdb ... |
| 219 | */ |
| 220 | #if NDEBUG |
| 221 | static struct Scsi_Host *default_instance; |
| 222 | #endif |
| 223 | |
| 224 | /* |
| 225 | * Function : int macscsi_detect(Scsi_Host_Template * tpnt) |
| 226 | * |
| 227 | * Purpose : initializes mac NCR5380 driver based on the |
| 228 | * command line / compile time port and irq definitions. |
| 229 | * |
| 230 | * Inputs : tpnt - template for this SCSI adapter. |
| 231 | * |
| 232 | * Returns : 1 if a host adapter was found, 0 if not. |
| 233 | * |
| 234 | */ |
| 235 | |
| 236 | int macscsi_detect(Scsi_Host_Template * tpnt) |
| 237 | { |
| 238 | static int called = 0; |
| 239 | int flags = 0; |
| 240 | struct Scsi_Host *instance; |
| 241 | |
| 242 | if (!MACH_IS_MAC || called) |
| 243 | return( 0 ); |
| 244 | |
| 245 | if (macintosh_config->scsi_type != MAC_SCSI_OLD) |
| 246 | return( 0 ); |
| 247 | |
| 248 | /* setup variables */ |
| 249 | tpnt->can_queue = |
| 250 | (setup_can_queue > 0) ? setup_can_queue : CAN_QUEUE; |
| 251 | tpnt->cmd_per_lun = |
| 252 | (setup_cmd_per_lun > 0) ? setup_cmd_per_lun : CMD_PER_LUN; |
| 253 | tpnt->sg_tablesize = |
| 254 | (setup_sg_tablesize >= 0) ? setup_sg_tablesize : SG_TABLESIZE; |
| 255 | |
| 256 | if (setup_hostid >= 0) |
| 257 | tpnt->this_id = setup_hostid; |
| 258 | else { |
| 259 | /* use 7 as default */ |
| 260 | tpnt->this_id = 7; |
| 261 | } |
| 262 | |
| 263 | #ifdef SUPPORT_TAGS |
| 264 | if (setup_use_tagged_queuing < 0) |
| 265 | setup_use_tagged_queuing = USE_TAGGED_QUEUING; |
| 266 | #endif |
| 267 | |
| 268 | /* Once we support multiple 5380s (e.g. DuoDock) we'll do |
| 269 | something different here */ |
| 270 | instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata)); |
| 271 | #if NDEBUG |
| 272 | default_instance = instance; |
| 273 | #endif |
| 274 | |
| 275 | if (macintosh_config->ident == MAC_MODEL_IIFX) { |
| 276 | mac_scsi_regp = via1+0x8000; |
| 277 | mac_scsi_drq = via1+0xE000; |
| 278 | mac_scsi_nodrq = via1+0xC000; |
| 279 | /* The IIFX should be able to do true DMA, but pseudo-dma doesn't work */ |
| 280 | flags = FLAG_NO_PSEUDO_DMA; |
| 281 | } else { |
| 282 | mac_scsi_regp = via1+0x10000; |
| 283 | mac_scsi_drq = via1+0x6000; |
| 284 | mac_scsi_nodrq = via1+0x12000; |
| 285 | } |
| 286 | |
| 287 | if (! setup_use_pdma) |
| 288 | flags = FLAG_NO_PSEUDO_DMA; |
| 289 | |
| 290 | instance->io_port = (unsigned long) mac_scsi_regp; |
| 291 | instance->irq = IRQ_MAC_SCSI; |
| 292 | |
| 293 | #ifdef RESET_BOOT |
| 294 | mac_scsi_reset_boot(instance); |
| 295 | #endif |
| 296 | |
| 297 | NCR5380_init(instance, flags); |
| 298 | |
| 299 | instance->n_io_port = 255; |
| 300 | |
| 301 | ((struct NCR5380_hostdata *)instance->hostdata)->ctrl = 0; |
| 302 | |
| 303 | if (instance->irq != SCSI_IRQ_NONE) |
| 304 | if (request_irq(instance->irq, NCR5380_intr, IRQ_FLG_SLOW, |
| 305 | "ncr5380", instance)) { |
| 306 | printk(KERN_WARNING "scsi%d: IRQ%d not free, interrupts disabled\n", |
| 307 | instance->host_no, instance->irq); |
| 308 | instance->irq = SCSI_IRQ_NONE; |
| 309 | } |
| 310 | |
| 311 | printk(KERN_INFO "scsi%d: generic 5380 at port %lX irq", instance->host_no, instance->io_port); |
| 312 | if (instance->irq == SCSI_IRQ_NONE) |
| 313 | printk (KERN_INFO "s disabled"); |
| 314 | else |
| 315 | printk (KERN_INFO " %d", instance->irq); |
| 316 | printk(KERN_INFO " options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", |
| 317 | instance->can_queue, instance->cmd_per_lun, MACSCSI_PUBLIC_RELEASE); |
| 318 | printk(KERN_INFO "\nscsi%d:", instance->host_no); |
| 319 | NCR5380_print_options(instance); |
| 320 | printk("\n"); |
| 321 | called = 1; |
| 322 | return 1; |
| 323 | } |
| 324 | |
| 325 | int macscsi_release (struct Scsi_Host *shpnt) |
| 326 | { |
| 327 | if (shpnt->irq != SCSI_IRQ_NONE) |
| 328 | free_irq (shpnt->irq, NCR5380_intr); |
| 329 | NCR5380_exit(shpnt); |
| 330 | |
| 331 | return 0; |
| 332 | } |
| 333 | |
| 334 | #ifdef RESET_BOOT |
| 335 | /* |
| 336 | * Our 'bus reset on boot' function |
| 337 | */ |
| 338 | |
| 339 | static void mac_scsi_reset_boot(struct Scsi_Host *instance) |
| 340 | { |
| 341 | unsigned long end; |
| 342 | |
| 343 | NCR5380_local_declare(); |
| 344 | NCR5380_setup(instance); |
| 345 | |
| 346 | /* |
| 347 | * Do a SCSI reset to clean up the bus during initialization. No messing |
| 348 | * with the queues, interrupts, or locks necessary here. |
| 349 | */ |
| 350 | |
| 351 | printk(KERN_INFO "Macintosh SCSI: resetting the SCSI bus..." ); |
| 352 | |
| 353 | /* switch off SCSI IRQ - catch an interrupt without IRQ bit set else */ |
| 354 | mac_disable_irq(IRQ_MAC_SCSI); |
| 355 | |
| 356 | /* get in phase */ |
| 357 | NCR5380_write( TARGET_COMMAND_REG, |
| 358 | PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) )); |
| 359 | |
| 360 | /* assert RST */ |
| 361 | NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST ); |
| 362 | /* The min. reset hold time is 25us, so 40us should be enough */ |
| 363 | udelay( 50 ); |
| 364 | /* reset RST and interrupt */ |
| 365 | NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE ); |
| 366 | NCR5380_read( RESET_PARITY_INTERRUPT_REG ); |
| 367 | |
| 368 | for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); ) |
| 369 | barrier(); |
| 370 | |
| 371 | /* switch on SCSI IRQ again */ |
| 372 | mac_enable_irq(IRQ_MAC_SCSI); |
| 373 | |
| 374 | printk(KERN_INFO " done\n" ); |
| 375 | } |
| 376 | #endif |
| 377 | |
| 378 | const char * macscsi_info (struct Scsi_Host *spnt) { |
| 379 | return ""; |
| 380 | } |
| 381 | |
| 382 | /* |
| 383 | Pseudo-DMA: (Ove Edlund) |
| 384 | The code attempts to catch bus errors that occur if one for example |
| 385 | "trips over the cable". |
| 386 | XXX: Since bus errors in the PDMA routines never happen on my |
| 387 | computer, the bus error code is untested. |
| 388 | If the code works as intended, a bus error results in Pseudo-DMA |
| 389 | beeing disabled, meaning that the driver switches to slow handshake. |
| 390 | If bus errors are NOT extremely rare, this has to be changed. |
| 391 | */ |
| 392 | |
| 393 | #define CP_IO_TO_MEM(s,d,len) \ |
| 394 | __asm__ __volatile__ \ |
| 395 | (" cmp.w #4,%2\n" \ |
| 396 | " bls 8f\n" \ |
| 397 | " move.w %1,%%d0\n" \ |
| 398 | " neg.b %%d0\n" \ |
| 399 | " and.w #3,%%d0\n" \ |
| 400 | " sub.w %%d0,%2\n" \ |
| 401 | " bra 2f\n" \ |
| 402 | " 1: move.b (%0),(%1)+\n" \ |
| 403 | " 2: dbf %%d0,1b\n" \ |
| 404 | " move.w %2,%%d0\n" \ |
| 405 | " lsr.w #5,%%d0\n" \ |
| 406 | " bra 4f\n" \ |
| 407 | " 3: move.l (%0),(%1)+\n" \ |
| 408 | "31: move.l (%0),(%1)+\n" \ |
| 409 | "32: move.l (%0),(%1)+\n" \ |
| 410 | "33: move.l (%0),(%1)+\n" \ |
| 411 | "34: move.l (%0),(%1)+\n" \ |
| 412 | "35: move.l (%0),(%1)+\n" \ |
| 413 | "36: move.l (%0),(%1)+\n" \ |
| 414 | "37: move.l (%0),(%1)+\n" \ |
| 415 | " 4: dbf %%d0,3b\n" \ |
| 416 | " move.w %2,%%d0\n" \ |
| 417 | " lsr.w #2,%%d0\n" \ |
| 418 | " and.w #7,%%d0\n" \ |
| 419 | " bra 6f\n" \ |
| 420 | " 5: move.l (%0),(%1)+\n" \ |
| 421 | " 6: dbf %%d0,5b\n" \ |
| 422 | " and.w #3,%2\n" \ |
| 423 | " bra 8f\n" \ |
| 424 | " 7: move.b (%0),(%1)+\n" \ |
| 425 | " 8: dbf %2,7b\n" \ |
| 426 | " moveq.l #0, %2\n" \ |
| 427 | " 9: \n" \ |
| 428 | ".section .fixup,\"ax\"\n" \ |
| 429 | " .even\n" \ |
| 430 | "90: moveq.l #1, %2\n" \ |
| 431 | " jra 9b\n" \ |
| 432 | ".previous\n" \ |
| 433 | ".section __ex_table,\"a\"\n" \ |
| 434 | " .align 4\n" \ |
| 435 | " .long 1b,90b\n" \ |
| 436 | " .long 3b,90b\n" \ |
| 437 | " .long 31b,90b\n" \ |
| 438 | " .long 32b,90b\n" \ |
| 439 | " .long 33b,90b\n" \ |
| 440 | " .long 34b,90b\n" \ |
| 441 | " .long 35b,90b\n" \ |
| 442 | " .long 36b,90b\n" \ |
| 443 | " .long 37b,90b\n" \ |
| 444 | " .long 5b,90b\n" \ |
| 445 | " .long 7b,90b\n" \ |
| 446 | ".previous" \ |
| 447 | : "=a"(s), "=a"(d), "=d"(len) \ |
| 448 | : "0"(s), "1"(d), "2"(len) \ |
| 449 | : "d0") |
| 450 | |
| 451 | |
| 452 | static int macscsi_pread (struct Scsi_Host *instance, |
| 453 | unsigned char *dst, int len) |
| 454 | { |
| 455 | unsigned char *d; |
| 456 | volatile unsigned char *s; |
| 457 | |
| 458 | NCR5380_local_declare(); |
| 459 | NCR5380_setup(instance); |
| 460 | |
| 461 | s = mac_scsi_drq+0x60; |
| 462 | d = dst; |
| 463 | |
| 464 | /* These conditions are derived from MacOS */ |
| 465 | |
| 466 | while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) |
| 467 | && !(NCR5380_read(STATUS_REG) & SR_REQ)) |
| 468 | ; |
| 469 | if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) |
| 470 | && (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)) { |
| 471 | printk(KERN_ERR "Error in macscsi_pread\n"); |
| 472 | return -1; |
| 473 | } |
| 474 | |
| 475 | CP_IO_TO_MEM(s, d, len); |
| 476 | |
| 477 | if (len != 0) { |
| 478 | printk(KERN_NOTICE "Bus error in macscsi_pread\n"); |
| 479 | return -1; |
| 480 | } |
| 481 | |
| 482 | return 0; |
| 483 | } |
| 484 | |
| 485 | |
| 486 | #define CP_MEM_TO_IO(s,d,len) \ |
| 487 | __asm__ __volatile__ \ |
| 488 | (" cmp.w #4,%2\n" \ |
| 489 | " bls 8f\n" \ |
| 490 | " move.w %0,%%d0\n" \ |
| 491 | " neg.b %%d0\n" \ |
| 492 | " and.w #3,%%d0\n" \ |
| 493 | " sub.w %%d0,%2\n" \ |
| 494 | " bra 2f\n" \ |
| 495 | " 1: move.b (%0)+,(%1)\n" \ |
| 496 | " 2: dbf %%d0,1b\n" \ |
| 497 | " move.w %2,%%d0\n" \ |
| 498 | " lsr.w #5,%%d0\n" \ |
| 499 | " bra 4f\n" \ |
| 500 | " 3: move.l (%0)+,(%1)\n" \ |
| 501 | "31: move.l (%0)+,(%1)\n" \ |
| 502 | "32: move.l (%0)+,(%1)\n" \ |
| 503 | "33: move.l (%0)+,(%1)\n" \ |
| 504 | "34: move.l (%0)+,(%1)\n" \ |
| 505 | "35: move.l (%0)+,(%1)\n" \ |
| 506 | "36: move.l (%0)+,(%1)\n" \ |
| 507 | "37: move.l (%0)+,(%1)\n" \ |
| 508 | " 4: dbf %%d0,3b\n" \ |
| 509 | " move.w %2,%%d0\n" \ |
| 510 | " lsr.w #2,%%d0\n" \ |
| 511 | " and.w #7,%%d0\n" \ |
| 512 | " bra 6f\n" \ |
| 513 | " 5: move.l (%0)+,(%1)\n" \ |
| 514 | " 6: dbf %%d0,5b\n" \ |
| 515 | " and.w #3,%2\n" \ |
| 516 | " bra 8f\n" \ |
| 517 | " 7: move.b (%0)+,(%1)\n" \ |
| 518 | " 8: dbf %2,7b\n" \ |
| 519 | " moveq.l #0, %2\n" \ |
| 520 | " 9: \n" \ |
| 521 | ".section .fixup,\"ax\"\n" \ |
| 522 | " .even\n" \ |
| 523 | "90: moveq.l #1, %2\n" \ |
| 524 | " jra 9b\n" \ |
| 525 | ".previous\n" \ |
| 526 | ".section __ex_table,\"a\"\n" \ |
| 527 | " .align 4\n" \ |
| 528 | " .long 1b,90b\n" \ |
| 529 | " .long 3b,90b\n" \ |
| 530 | " .long 31b,90b\n" \ |
| 531 | " .long 32b,90b\n" \ |
| 532 | " .long 33b,90b\n" \ |
| 533 | " .long 34b,90b\n" \ |
| 534 | " .long 35b,90b\n" \ |
| 535 | " .long 36b,90b\n" \ |
| 536 | " .long 37b,90b\n" \ |
| 537 | " .long 5b,90b\n" \ |
| 538 | " .long 7b,90b\n" \ |
| 539 | ".previous" \ |
| 540 | : "=a"(s), "=a"(d), "=d"(len) \ |
| 541 | : "0"(s), "1"(d), "2"(len) \ |
| 542 | : "d0") |
| 543 | |
| 544 | static int macscsi_pwrite (struct Scsi_Host *instance, |
| 545 | unsigned char *src, int len) |
| 546 | { |
| 547 | unsigned char *s; |
| 548 | volatile unsigned char *d; |
| 549 | |
| 550 | NCR5380_local_declare(); |
| 551 | NCR5380_setup(instance); |
| 552 | |
| 553 | s = src; |
| 554 | d = mac_scsi_drq; |
| 555 | |
| 556 | /* These conditions are derived from MacOS */ |
| 557 | |
| 558 | while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) |
| 559 | && (!(NCR5380_read(STATUS_REG) & SR_REQ) |
| 560 | || (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH))) |
| 561 | ; |
| 562 | if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ)) { |
| 563 | printk(KERN_ERR "Error in macscsi_pwrite\n"); |
| 564 | return -1; |
| 565 | } |
| 566 | |
| 567 | CP_MEM_TO_IO(s, d, len); |
| 568 | |
| 569 | if (len != 0) { |
| 570 | printk(KERN_NOTICE "Bus error in macscsi_pwrite\n"); |
| 571 | return -1; |
| 572 | } |
| 573 | |
| 574 | return 0; |
| 575 | } |
| 576 | |
| 577 | |
| 578 | /* These control the behaviour of the generic 5380 core */ |
| 579 | #define AUTOSENSE |
| 580 | #define PSEUDO_DMA |
| 581 | |
| 582 | #include "NCR5380.c" |
| 583 | |
| 584 | static Scsi_Host_Template driver_template = { |
| 585 | .proc_name = "Mac5380", |
| 586 | .proc_info = macscsi_proc_info, |
| 587 | .name = "Macintosh NCR5380 SCSI", |
| 588 | .detect = macscsi_detect, |
| 589 | .release = macscsi_release, |
| 590 | .info = macscsi_info, |
| 591 | .queuecommand = macscsi_queue_command, |
| 592 | .eh_abort_handler = macscsi_abort, |
| 593 | .eh_bus_reset_handler = macscsi_bus_reset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | .can_queue = CAN_QUEUE, |
| 595 | .this_id = 7, |
| 596 | .sg_tablesize = SG_ALL, |
| 597 | .cmd_per_lun = CMD_PER_LUN, |
| 598 | .unchecked_isa_dma = 0, |
| 599 | .use_clustering = DISABLE_CLUSTERING |
| 600 | }; |
| 601 | |
| 602 | |
| 603 | #include "scsi_module.c" |