drivers/scsi/mac_esp.c

   1 /*
   2  * 68k mac 53c9[46] scsi driver
   3  *
   4  * copyright (c) 1998, David Weis weisd3458@uni.edu
   5  *
   6  * debugging on Quadra 800 and 660AV Michael Schmitz, Dave Kilzer 7/98
   7  *
   8  * based loosely on cyber_esp.c
   9  */
  10
  11 /* these are unused for now */
  12 #define myreadl(addr) (*(volatile unsigned int *) (addr))
  13 #define mywritel(b, addr) ((*(volatile unsigned int *) (addr)) = (b))
  14
  15
  16 #include <linux/kernel.h>
  17 #include <linux/delay.h>
  18 #include <linux/types.h>
  19 #include <linux/ctype.h>
  20 #include <linux/string.h>
  21 #include <linux/slab.h>
  22 #include <linux/blkdev.h>
  23 #include <linux/proc_fs.h>
  24 #include <linux/stat.h>
  25 #include <linux/init.h>
  26 #include <linux/interrupt.h>
  27
  28 #include "scsi.h"
  29 #include <scsi/scsi_host.h>
  30 #include "NCR53C9x.h"
  31
  32 #include <asm/io.h>
  33
  34 #include <asm/setup.h>
  35 #include <asm/irq.h>
  36 #include <asm/macints.h>
  37 #include <asm/machw.h>
  38 #include <asm/mac_via.h>
  39
  40 #include <asm/pgtable.h>
  41
  42 #include <asm/macintosh.h>
  43
  44 /* #define DEBUG_MAC_ESP */
  45
  46 extern void esp_handle(struct NCR_ESP *esp);
  47 extern void mac_esp_intr(int irq, void *dev_id);
  48
  49 static int  dma_bytes_sent(struct NCR_ESP * esp, int fifo_count);
  50 static int  dma_can_transfer(struct NCR_ESP * esp, Scsi_Cmnd *sp);
  51 static void dma_dump_state(struct NCR_ESP * esp);
  52 static void dma_init_read(struct NCR_ESP * esp, char * vaddress, int length);
  53 static void dma_init_write(struct NCR_ESP * esp, char * vaddress, int length);
  54 static void dma_ints_off(struct NCR_ESP * esp);
  55 static void dma_ints_on(struct NCR_ESP * esp);
  56 static int  dma_irq_p(struct NCR_ESP * esp);
  57 static int  dma_irq_p_quick(struct NCR_ESP * esp);
  58 static void dma_led_off(struct NCR_ESP * esp);
  59 static void dma_led_on(struct NCR_ESP *esp);
  60 static int  dma_ports_p(struct NCR_ESP *esp);
  61 static void dma_setup(struct NCR_ESP * esp, __u32 addr, int count, int write);
  62 static void dma_setup_quick(struct NCR_ESP * esp, __u32 addr, int count, int write);
  63
  64 static int esp_dafb_dma_irq_p(struct NCR_ESP * espdev);
  65 static int esp_iosb_dma_irq_p(struct NCR_ESP * espdev);
  66
  67 static volatile unsigned char cmd_buffer[16];
  68                                 /* This is where all commands are put
  69                                  * before they are transferred to the ESP chip
  70                                  * via PIO.
  71                                  */
  72
  73 static int esp_initialized = 0;
  74
  75 static int setup_num_esps = -1;
  76 static int setup_disconnect = -1;
  77 static int setup_nosync = -1;
  78 static int setup_can_queue = -1;
  79 static int setup_cmd_per_lun = -1;
  80 static int setup_sg_tablesize = -1;
  81 #ifdef SUPPORT_TAGS
  82 static int setup_use_tagged_queuing = -1;
  83 #endif
  84 static int setup_hostid = -1;
  85
  86 /*
  87  * Experimental ESP inthandler; check macints.c to make sure dev_id is
  88  * set up properly!
  89  */
  90
  91 void mac_esp_intr(int irq, void *dev_id)
  92 {
  93         struct NCR_ESP *esp = (struct NCR_ESP *) dev_id;
  94         int irq_p = 0;
  95
  96         /* Handle the one ESP interrupt showing at this IRQ level. */
  97         if(((esp)->irq & 0xff) == irq) {
  98         /*
  99          * Debug ..
 100          */
 101                 irq_p = esp->dma_irq_p(esp);
 102                 printk("mac_esp: irq_p %x current %p disconnected %p\n",
 103                         irq_p, esp->current_SC, esp->disconnected_SC);
 104
 105                 /*
 106                  * Mac: if we're here, it's an ESP interrupt for sure!
 107                  */
 108                 if((esp->current_SC || esp->disconnected_SC)) {
 109                         esp->dma_ints_off(esp);
 110
 111                         ESPIRQ(("I%d(", esp->esp_id));
 112                         esp_handle(esp);
 113                         ESPIRQ((")"));
 114
 115                         esp->dma_ints_on(esp);
 116                 }
 117         }
 118 }
 119
 120 /*
 121  * Debug hooks; use for playing with the interrupt flag testing and interrupt
 122  * acknowledge on the various machines
 123  */
 124
 125 void scsi_esp_polled(int irq, void *dev_id)
 126 {
 127         if (esp_initialized == 0)
 128                 return;
 129
 130         mac_esp_intr(irq, dev_id);
 131 }
 132
 133 void fake_intr(int irq, void *dev_id)
 134 {
 135 #ifdef DEBUG_MAC_ESP
 136         printk("mac_esp: got irq\n");
 137 #endif
 138
 139         mac_esp_intr(irq, dev_id);
 140 }
 141
 142 irqreturn_t fake_drq(int irq, void *dev_id)
 143 {
 144         printk("mac_esp: got drq\n");
 145         return IRQ_HANDLED;
 146 }
 147
 148 #define DRIVER_SETUP
 149
 150 /*
 151  * Function : mac_esp_setup(char *str)
 152  *
 153  * Purpose : booter command line initialization of the overrides array,
 154  *
 155  * Inputs : str - parameters, separated by commas.
 156  *
 157  * Currently unused in the new driver; need to add settable parameters to the
 158  * detect function.
 159  *
 160  */
 161
 162 static int __init mac_esp_setup(char *str) {
 163 #ifdef DRIVER_SETUP
 164         /* Format of mac53c9x parameter is:
 165          *   mac53c9x=<num_esps>,<disconnect>,<nosync>,<can_queue>,<cmd_per_lun>,<sg_tablesize>,<hostid>,<use_tags>
 166          * Negative values mean don't change.
 167          */
 168
 169         char *this_opt;
 170         long opt;
 171
 172         this_opt = strsep (&str, ",");
 173         if(this_opt) {
 174                 opt = simple_strtol( this_opt, NULL, 0 );
 175
 176                 if (opt >= 0 && opt <= 2)
 177                         setup_num_esps = opt;
 178                 else if (opt > 2)
 179                         printk( "mac_esp_setup: invalid number of hosts %ld !\n", opt );
 180
 181                 this_opt = strsep (&str, ",");
 182         }
 183         if(this_opt) {
 184                 opt = simple_strtol( this_opt, NULL, 0 );
 185
 186                 if (opt > 0)
 187                         setup_disconnect = opt;
 188
 189                 this_opt = strsep (&str, ",");
 190         }
 191         if(this_opt) {
 192                 opt = simple_strtol( this_opt, NULL, 0 );
 193
 194                 if (opt >= 0)
 195                         setup_nosync = opt;
 196
 197                 this_opt = strsep (&str, ",");
 198         }
 199         if(this_opt) {
 200                 opt = simple_strtol( this_opt, NULL, 0 );
 201
 202                 if (opt > 0)
 203                         setup_can_queue = opt;
 204
 205                 this_opt = strsep (&str, ",");
 206         }
 207         if(this_opt) {
 208                 opt = simple_strtol( this_opt, NULL, 0 );
 209
 210                 if (opt > 0)
 211                         setup_cmd_per_lun = opt;
 212
 213                 this_opt = strsep (&str, ",");
 214         }
 215         if(this_opt) {
 216                 opt = simple_strtol( this_opt, NULL, 0 );
 217
 218                 if (opt >= 0) {
 219                         setup_sg_tablesize = opt;
 220                         /* Must be <= SG_ALL (255) */
 221                         if (setup_sg_tablesize > SG_ALL)
 222                                 setup_sg_tablesize = SG_ALL;
 223                 }
 224
 225                 this_opt = strsep (&str, ",");
 226         }
 227         if(this_opt) {
 228                 opt = simple_strtol( this_opt, NULL, 0 );
 229
 230                 /* Must be between 0 and 7 */
 231                 if (opt >= 0 && opt <= 7)
 232                         setup_hostid = opt;
 233                 else if (opt > 7)
 234                         printk( "mac_esp_setup: invalid host ID %ld !\n", opt);
 235
 236                 this_opt = strsep (&str, ",");
 237         }
 238 #ifdef SUPPORT_TAGS
 239         if(this_opt) {
 240                 opt = simple_strtol( this_opt, NULL, 0 );
 241                 if (opt >= 0)
 242                         setup_use_tagged_queuing = !!opt;
 243         }
 244 #endif
 245 #endif
 246         return 1;
 247 }
 248
 249 __setup("mac53c9x=", mac_esp_setup);
 250
 251
 252 /*
 253  * ESP address 'detection'
 254  */
 255
 256 unsigned long get_base(int chip_num)
 257 {
 258         /*
 259          * using the chip_num and mac model, figure out where the
 260          * chips are mapped
 261          */
 262
 263         unsigned long io_base = 0x50f00000;
 264         unsigned int second_offset = 0x402;
 265         unsigned long scsi_loc = 0;
 266
 267         switch (macintosh_config->scsi_type) {
 268
 269         /* 950, 900, 700 */
 270         case MAC_SCSI_QUADRA2:
 271                 scsi_loc =  io_base + 0xf000 + ((chip_num == 0) ? 0 : second_offset);
 272                 break;
 273
 274         /* av's */
 275         case MAC_SCSI_QUADRA3:
 276                 scsi_loc = io_base + 0x18000 + ((chip_num == 0) ? 0 : second_offset);
 277                 break;
 278
 279         /* most quadra/centris models are like this */
 280         case MAC_SCSI_QUADRA:
 281                 scsi_loc = io_base + 0x10000;
 282                 break;
 283
 284         default:
 285                 printk("mac_esp: get_base: hit default!\n");
 286                 scsi_loc = io_base + 0x10000;
 287                 break;
 288
 289         } /* switch */
 290
 291         printk("mac_esp: io base at 0x%lx\n", scsi_loc);
 292
 293         return scsi_loc;
 294 }
 295
 296 /*
 297  * Model dependent ESP setup
 298  */
 299
 300 int mac_esp_detect(struct scsi_host_template * tpnt)
 301 {
 302         int quick = 0;
 303         int chipnum, chipspresent = 0;
 304 #if 0
 305         unsigned long timeout;
 306 #endif
 307
 308         if (esp_initialized > 0)
 309                 return -ENODEV;
 310
 311         /* what do we have in this machine... */
 312         if (MACHW_PRESENT(MAC_SCSI_96)) {
 313                 chipspresent ++;
 314         }
 315
 316         if (MACHW_PRESENT(MAC_SCSI_96_2)) {
 317                 chipspresent ++;
 318         }
 319
 320         /* number of ESPs present ? */
 321         if (setup_num_esps >= 0) {
 322           if (chipspresent >= setup_num_esps)
 323             chipspresent = setup_num_esps;
 324           else
 325             printk("mac_esp_detect: num_hosts detected %d setup %d \n",
 326                    chipspresent, setup_num_esps);
 327         }
 328
 329         /* TODO: add disconnect / nosync flags */
 330
 331         /* setup variables */
 332         tpnt->can_queue =
 333           (setup_can_queue > 0) ? setup_can_queue : 7;
 334         tpnt->cmd_per_lun =
 335           (setup_cmd_per_lun > 0) ? setup_cmd_per_lun : 1;
 336         tpnt->sg_tablesize =
 337           (setup_sg_tablesize >= 0) ? setup_sg_tablesize : SG_ALL;
 338
 339         if (setup_hostid >= 0)
 340           tpnt->this_id = setup_hostid;
 341         else {
 342           /* use 7 as default */
 343           tpnt->this_id = 7;
 344         }
 345
 346 #ifdef SUPPORT_TAGS
 347         if (setup_use_tagged_queuing < 0)
 348                 setup_use_tagged_queuing = DEFAULT_USE_TAGGED_QUEUING;
 349 #endif
 350
 351         for (chipnum = 0; chipnum < chipspresent; chipnum ++) {
 352                 struct NCR_ESP * esp;
 353
 354                 esp = esp_allocate(tpnt, (void *) NULL);
 355                 esp->eregs = (struct ESP_regs *) get_base(chipnum);
 356
 357                 esp->dma_irq_p = &esp_dafb_dma_irq_p;
 358                 if (chipnum == 0) {
 359
 360                         if (macintosh_config->scsi_type == MAC_SCSI_QUADRA) {
 361                                 /* most machines except those below :-) */
 362                                 quick = 1;
 363                                 esp->dma_irq_p = &esp_iosb_dma_irq_p;
 364                         } else if (macintosh_config->scsi_type == MAC_SCSI_QUADRA3) {
 365                                 /* mostly av's */
 366                                 quick = 0;
 367                         } else {
 368                                 /* q950, 900, 700 */
 369                                 quick = 1;
 370                                 out_be32(0xf9800024, 0x1d1);
 371                                 esp->dregs = (void *) 0xf9800024;
 372                         }
 373
 374                 } else { /* chipnum */
 375
 376                         quick = 1;
 377                         out_be32(0xf9800028, 0x1d1);
 378                         esp->dregs = (void *) 0xf9800028;
 379
 380                 } /* chipnum == 0 */
 381
 382                 /* use pio for command bytes; pio for message/data: TBI */
 383                 esp->do_pio_cmds = 1;
 384
 385                 /* Set the command buffer */
 386                 esp->esp_command = (volatile unsigned char*) cmd_buffer;
 387                 esp->esp_command_dvma = (__u32) cmd_buffer;
 388
 389                 /* various functions */
 390                 esp->dma_bytes_sent = &dma_bytes_sent;
 391                 esp->dma_can_transfer = &dma_can_transfer;
 392                 esp->dma_dump_state = &dma_dump_state;
 393                 esp->dma_init_read = NULL;
 394                 esp->dma_init_write = NULL;
 395                 esp->dma_ints_off = &dma_ints_off;
 396                 esp->dma_ints_on = &dma_ints_on;
 397
 398                 esp->dma_ports_p = &dma_ports_p;
 399
 400
 401                 /* Optional functions */
 402                 esp->dma_barrier = NULL;
 403                 esp->dma_drain = NULL;
 404                 esp->dma_invalidate = NULL;
 405                 esp->dma_irq_entry = NULL;
 406                 esp->dma_irq_exit = NULL;
 407                 esp->dma_led_on = NULL;
 408                 esp->dma_led_off = NULL;
 409                 esp->dma_poll = NULL;
 410                 esp->dma_reset = NULL;
 411
 412                 /* SCSI chip speed */
 413                 /* below esp->cfreq = 40000000; */
 414
 415
 416                 if (quick) {
 417                         /* 'quick' means there's handshake glue logic like in the 5380 case */
 418                         esp->dma_setup = &dma_setup_quick;
 419                 } else {
 420                         esp->dma_setup = &dma_setup;
 421                 }
 422
 423                 if (chipnum == 0) {
 424
 425                         esp->irq = IRQ_MAC_SCSI;
 426
 427                         request_irq(IRQ_MAC_SCSI, esp_intr, 0, "Mac ESP SCSI", esp->ehost);
 428 #if 0   /* conflicts with IOP ADB */
 429                         request_irq(IRQ_MAC_SCSIDRQ, fake_drq, 0, "Mac ESP DRQ", esp->ehost);
 430 #endif
 431
 432                         if (macintosh_config->scsi_type == MAC_SCSI_QUADRA) {
 433                                 esp->cfreq = 16500000;
 434                         } else {
 435                                 esp->cfreq = 25000000;
 436                         }
 437
 438
 439                 } else { /* chipnum == 1 */
 440
 441                         esp->irq = IRQ_MAC_SCSIDRQ;
 442 #if 0   /* conflicts with IOP ADB */
 443                         request_irq(IRQ_MAC_SCSIDRQ, esp_intr, 0, "Mac ESP SCSI 2", esp->ehost);
 444 #endif
 445
 446                         esp->cfreq = 25000000;
 447
 448                 }
 449
 450                 if (quick) {
 451                         printk("esp: using quick version\n");
 452                 }
 453
 454                 printk("esp: addr at 0x%p\n", esp->eregs);
 455
 456                 esp->scsi_id = 7;
 457                 esp->diff = 0;
 458
 459                 esp_initialize(esp);
 460
 461         } /* for chipnum */
 462
 463         if (chipspresent)
 464                 printk("\nmac_esp: %d esp controllers found\n", chipspresent);
 465
 466         esp_initialized = chipspresent;
 467
 468         return chipspresent;
 469 }
 470
 471 static int mac_esp_release(struct Scsi_Host *shost)
 472 {
 473         if (shost->irq)
 474                 free_irq(shost->irq, NULL);
 475         if (shost->io_port && shost->n_io_port)
 476                 release_region(shost->io_port, shost->n_io_port);
 477         scsi_unregister(shost);
 478         return 0;
 479 }
 480
 481 /*
 482  * I've been wondering what this is supposed to do, for some time. Talking
 483  * to Allen Briggs: These machines have an extra register someplace where the
 484  * DRQ pin of the ESP can be monitored. That isn't useful for determining
 485  * anything else (such as reselect interrupt or other magic) though.
 486  * Maybe make the semantics should be changed like
 487  * if (esp->current_SC)
 488  *      ... check DRQ flag ...
 489  * else
 490  *      ... disconnected, check pending VIA interrupt ...
 491  *
 492  * There's a problem with using the dabf flag or mac_irq_pending() here: both
 493  * seem to return 1 even though no interrupt is currently pending, resulting
 494  * in esp_exec_cmd() holding off the next command, and possibly infinite loops
 495  * in esp_intr().
 496  * Short term fix: just use esp_status & ESP_STAT_INTR here, as long as we
 497  * use simple PIO. The DRQ status will be important when implementing pseudo
 498  * DMA mode (set up ESP transfer count, return, do a batch of bytes in PIO or
 499  * 'hardware handshake' mode upon DRQ).
 500  * If you plan on changing this (i.e. to save the esp_status register access in
 501  * favor of a VIA register access or a shadow register for the IFR), make sure
 502  * to try a debug version of this first to monitor what registers would be a good
 503  * indicator of the ESP interrupt.
 504  */
 505
 506 static int esp_dafb_dma_irq_p(struct NCR_ESP * esp)
 507 {
 508         unsigned int ret;
 509         int sreg = esp_read(esp->eregs->esp_status);
 510
 511 #ifdef DEBUG_MAC_ESP
 512         printk("mac_esp: esp_dafb_dma_irq_p dafb %d irq %d\n",
 513                 readl(esp->dregs), mac_irq_pending(IRQ_MAC_SCSI));
 514 #endif
 515
 516         sreg &= ESP_STAT_INTR;
 517
 518         /*
 519          * maybe working; this is essentially what's used for iosb_dma_irq_p
 520          */
 521         if (sreg)
 522                 return 1;
 523         else
 524                 return 0;
 525
 526         /*
 527          * didn't work ...
 528          */
 529 #if 0
 530         if (esp->current_SC)
 531                 ret = readl(esp->dregs) & 0x200;
 532         else if (esp->disconnected_SC)
 533                 ret = 1; /* sreg ?? */
 534         else
 535                 ret = mac_irq_pending(IRQ_MAC_SCSI);
 536
 537         return(ret);
 538 #endif
 539
 540 }
 541
 542 /*
 543  * See above: testing mac_irq_pending always returned 8 (SCSI IRQ) regardless
 544  * of the actual ESP status.
 545  */
 546
 547 static int esp_iosb_dma_irq_p(struct NCR_ESP * esp)
 548 {
 549         int ret  = mac_irq_pending(IRQ_MAC_SCSI) || mac_irq_pending(IRQ_MAC_SCSIDRQ);
 550         int sreg = esp_read(esp->eregs->esp_status);
 551
 552 #ifdef DEBUG_MAC_ESP
 553         printk("mac_esp: dma_irq_p drq %d irq %d sreg %x curr %p disc %p\n",
 554                 mac_irq_pending(IRQ_MAC_SCSIDRQ), mac_irq_pending(IRQ_MAC_SCSI),
 555                 sreg, esp->current_SC, esp->disconnected_SC);
 556 #endif
 557
 558         sreg &= ESP_STAT_INTR;
 559
 560         if (sreg)
 561                 return (sreg);
 562         else
 563                 return 0;
 564 }
 565
 566 /*
 567  * This seems to be OK for PIO at least ... usually 0 after PIO.
 568  */
 569
 570 static int dma_bytes_sent(struct NCR_ESP * esp, int fifo_count)
 571 {
 572
 573 #ifdef DEBUG_MAC_ESP
 574         printk("mac_esp: dma bytes sent = %x\n", fifo_count);
 575 #endif
 576
 577         return fifo_count;
 578 }
 579
 580 /*
 581  * dma_can_transfer is used to switch between DMA and PIO, if DMA (pseudo)
 582  * is ever implemented. Returning 0 here will use PIO.
 583  */
 584
 585 static int dma_can_transfer(struct NCR_ESP * esp, Scsi_Cmnd * sp)
 586 {
 587         unsigned long sz = sp->SCp.this_residual;
 588 #if 0   /* no DMA yet; make conditional */
 589         if (sz > 0x10000000) {
 590                 sz = 0x10000000;
 591         }
 592         printk("mac_esp: dma can transfer = 0lx%x\n", sz);
 593 #else
 594
 595 #ifdef DEBUG_MAC_ESP
 596         printk("mac_esp: pio to transfer = %ld\n", sz);
 597 #endif
 598
 599         sz = 0;
 600 #endif
 601         return sz;
 602 }
 603
 604 /*
 605  * Not yet ...
 606  */
 607
 608 static void dma_dump_state(struct NCR_ESP * esp)
 609 {
 610 #ifdef DEBUG_MAC_ESP
 611         printk("mac_esp: dma_dump_state: called\n");
 612 #endif
 613 #if 0
 614         ESPLOG(("esp%d: dma -- cond_reg<%02x>\n",
 615                 esp->esp_id, ((struct mac_dma_registers *)
 616                 (esp->dregs))->cond_reg));
 617 #endif
 618 }
 619
 620 /*
 621  * DMA setup: should be used to set up the ESP transfer count for pseudo
 622  * DMA transfers; need a DRQ transfer function to do the actual transfer
 623  */
 624
 625 static void dma_init_read(struct NCR_ESP * esp, char * vaddress, int length)
 626 {
 627         printk("mac_esp: dma_init_read\n");
 628 }
 629
 630
 631 static void dma_init_write(struct NCR_ESP * esp, char * vaddress, int length)
 632 {
 633         printk("mac_esp: dma_init_write\n");
 634 }
 635
 636
 637 static void dma_ints_off(struct NCR_ESP * esp)
 638 {
 639         disable_irq(esp->irq);
 640 }
 641
 642
 643 static void dma_ints_on(struct NCR_ESP * esp)
 644 {
 645         enable_irq(esp->irq);
 646 }
 647
 648 /*
 649  * generic dma_irq_p(), unused
 650  */
 651
 652 static int dma_irq_p(struct NCR_ESP * esp)
 653 {
 654         int i = esp_read(esp->eregs->esp_status);
 655
 656 #ifdef DEBUG_MAC_ESP
 657         printk("mac_esp: dma_irq_p status %d\n", i);
 658 #endif
 659
 660         return (i & ESP_STAT_INTR);
 661 }
 662
 663 static int dma_irq_p_quick(struct NCR_ESP * esp)
 664 {
 665         /*
 666          * Copied from iosb_dma_irq_p()
 667          */
 668         int ret  = mac_irq_pending(IRQ_MAC_SCSI) || mac_irq_pending(IRQ_MAC_SCSIDRQ);
 669         int sreg = esp_read(esp->eregs->esp_status);
 670
 671 #ifdef DEBUG_MAC_ESP
 672         printk("mac_esp: dma_irq_p drq %d irq %d sreg %x curr %p disc %p\n",
 673                 mac_irq_pending(IRQ_MAC_SCSIDRQ), mac_irq_pending(IRQ_MAC_SCSI),
 674                 sreg, esp->current_SC, esp->disconnected_SC);
 675 #endif
 676
 677         sreg &= ESP_STAT_INTR;
 678
 679         if (sreg)
 680                 return (sreg);
 681         else
 682                 return 0;
 683
 684 }
 685
 686 static void dma_led_off(struct NCR_ESP * esp)
 687 {
 688 #ifdef DEBUG_MAC_ESP
 689         printk("mac_esp: dma_led_off: called\n");
 690 #endif
 691 }
 692
 693
 694 static void dma_led_on(struct NCR_ESP * esp)
 695 {
 696 #ifdef DEBUG_MAC_ESP
 697         printk("mac_esp: dma_led_on: called\n");
 698 #endif
 699 }
 700
 701
 702 static int dma_ports_p(struct NCR_ESP * esp)
 703 {
 704         return 0;
 705 }
 706
 707
 708 static void dma_setup(struct NCR_ESP * esp, __u32 addr, int count, int write)
 709 {
 710
 711 #ifdef DEBUG_MAC_ESP
 712         printk("mac_esp: dma_setup\n");
 713 #endif
 714
 715         if (write) {
 716                 dma_init_read(esp, (char *) addr, count);
 717         } else {
 718                 dma_init_write(esp, (char *) addr, count);
 719         }
 720 }
 721
 722
 723 static void dma_setup_quick(struct NCR_ESP * esp, __u32 addr, int count, int write)
 724 {
 725 #ifdef DEBUG_MAC_ESP
 726         printk("mac_esp: dma_setup_quick\n");
 727 #endif
 728 }
 729
 730 static struct scsi_host_template driver_template = {
 731         .proc_name              = "mac_esp",
 732         .name                   = "Mac 53C9x SCSI",
 733         .detect                 = mac_esp_detect,
 734         .slave_alloc            = esp_slave_alloc,
 735         .slave_destroy          = esp_slave_destroy,
 736         .release                = mac_esp_release,
 737         .info                   = esp_info,
 738         .queuecommand           = esp_queue,
 739         .eh_abort_handler       = esp_abort,
 740         .eh_bus_reset_handler   = esp_reset,
 741         .can_queue              = 7,
 742         .this_id                = 7,
 743         .sg_tablesize           = SG_ALL,
 744         .cmd_per_lun            = 1,
 745         .use_clustering         = DISABLE_CLUSTERING
 746 };
 747
 748
 749 #include "scsi_module.c"
 750
 751 MODULE_LICENSE("GPL");