kernel/blk_drv/scsi/aha1542.c

/* */
This source file includes following definitions.
aha1542_stat
aha1542_out
makecode
aha1542_test_port
aha1542_info
aha1542_intr_handle
aha1542_queuecommand
internal_done
aha1542_command
setup_mailboxes
call_buh
aha1542_detect
aha1542_abort
aha1542_reset
   1 /* $Id: aha1542.c,v 1.1 1992/07/24 06:27:38 root Exp root $
   2  *  linux/kernel/aha1542.c
   3  *
   4  *  Copyright (C) 1992  Tommy Thorn
   5  */
   6 
   7 #include <linux/config.h>
   8 #include <linux/kernel.h>
   9 #include <linux/head.h>
  10 #include <linux/types.h>
  11 #include <linux/string.h>
  12 
  13 #include <asm/system.h>
  14 #include <asm/io.h>
  15 #include "scsi.h"
  16 #include "hosts.h"
  17 
  18 #include "aha1542.h"
  19 #ifdef DEBUG
  20 #define DEB(x) x
  21 #else
  22 #define DEB(x)
  23 #endif
  24 
  25 /*
  26 static const char RCSid[] = "$Header: /usr/src/linux/kernel/blk_drv/scsi/RCS/aha1542.c,v 1.1 1992/07/24 06:27:38 root Exp root $";
  27 */
  28 
  29 #define base 0x330
  30 #define intr_chan 11
  31 
  32 static struct mailbox mb[2];
  33 static struct ccb ccb;
  34 
  35 long WAITtimeout, WAITnexttimeout = 3000000;
  36 
  37 void (*do_done)(int, int) = NULL;
  38 int aha1542_host = 0;
  39 extern void aha1542_interrupt();
  40 
  41 #define aha1542_intr_reset()  outb(IRST, CONTROL)
  42 #define aha1542_enable_intr() outb(inb_p(0xA1) & ~8, 0xA1)
  43 #define aha1542_disable_intr() outb(inb_p(0xA1) | 8, 0xA1)
  44 
  45 #define WAIT(port, mask, allof, noneof)                                 \
  46  { register WAITbits;                                                   \
  47    register WAITtimeout = WAITnexttimeout;                              \
  48    while (1) {                                                          \
  49      WAITbits = inb(port) & (mask);                                     \
  50      if ((WAITbits & (allof)) == (allof) && ((WAITbits & (noneof)) == 0)) \
  51        break;                                                           \
  52      if (--WAITtimeout == 0) goto fail;                                 \
  53    }                                                                    \
  54  }
  55 
  56 static void aha1542_stat(void)
     /*  */
  57 {
  58 /*    int s = inb(STATUS), i = inb(INTRFLAGS);
  59   printk("status=%x intrflags=%x\n", s, i, WAITnexttimeout-WAITtimeout); */
  60 }
  61 
  62 static int aha1542_out(unchar *cmdp, int len)
     /*  */
  63 {
  64     while (len--)
  65       {
  66           WAIT(STATUS, CDF, 0, CDF);
  67           outb(*cmdp++, DATA);
  68       }
  69     return 0;
  70   fail:
  71     printk("aha1542_out failed(%d): ", len+1); aha1542_stat();
  72     return 1;
  73 }
  74 
  75 int makecode(unsigned hosterr, unsigned scsierr)
     /*  */
  76 {
  77     switch (hosterr) {
  78       case 0x0:
  79       case 0xa: /* Linked command complete without error and linked normally */
  80       case 0xb: /* Linked command complete without error, interrupt generated */
  81         hosterr = 0;
  82         break;
  83 
  84       case 0x11: /* Selection time out-The initiator selection or target
  85                     reselection was not complete within the SCSI Time out period */
  86         hosterr = DID_TIME_OUT;
  87         break;
  88 
  89       case 0x12: /* Data overrun/underrun-The target attempted to transfer more data
  90                     thean was allocated by the Data Length field or the sum of the
  91                     Scatter / Gather Data Length fields. */
  92 
  93       case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
  94 
  95       case 0x15: /* MBO command was not 00, 01 or 02-The first byte of the CB was
  96                     invalid. This usually indicates a software failure. */
  97 
  98       case 0x16: /* Invalid CCB Operation Code-The first byte of the CCB was invalid.
  99                     This usually indicates a software failure. */
 100 
 101       case 0x17: /* Linked CCB does not have the same LUN-A subsequent CCB of a set
 102                     of linked CCB's does not specify the same logical unit number as
 103                     the first. */
 104       case 0x18: /* Invalid Target Direction received from Host-The direction of a
 105                     Target Mode CCB was invalid. */
 106 
 107       case 0x19: /* Duplicate CCB Received in Target Mode-More than once CCB was
 108                     received to service data transfer between the same target LUN
 109                     and initiator SCSI ID in the same direction. */
 110 
 111       case 0x1a: /* Invalid CCB or Segment List Parameter-A segment list with a zero
 112                     length segment or invalid segment list boundaries was received.
 113                     A CCB parameter was invalid. */
 114         hosterr = DID_ERROR; /* Couldn't find any better */
 115         break;
 116 
 117       case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus
 118                     phase sequence was requested by the target. The host adapter
 119                     will generate a SCSI Reset Condition, notifying the host with
 120                     a SCRD interrupt */
 121         hosterr = DID_RESET;
 122         break;
 123       default:
 124         printk("makecode: unknown hoststatus %x\n", hosterr);
 125         break;
 126     }
 127     return scsierr|(hosterr << 16);
 128 }
 129 
 130 int aha1542_test_port(void)
     /*  */
 131 {
 132     volatile int debug = 0;
 133     
 134     /* Reset the adapter. I ought to make a hard reset, but it's not really nessesary */
 135     
 136     /*  DEB(printk("aha1542_test_port called \n")); */
 137     
 138     outb(SRST|IRST/*|SCRST*/, CONTROL);
 139     
 140     debug = 1;
 141     /* Expect INIT and IDLE, any of the others are bad */
 142     WAIT(STATUS, STATMASK, INIT|IDLE, STST|DIAGF|INVDCMD|DF|CDF);
 143     
 144     debug = 2;
 145     /* Shouldn't have generated any interrupts during reset */
 146     if (inb(INTRFLAGS)&INTRMASK) goto fail;
 147     
 148     debug = 3;
 149     /* Test the basic ECHO command */
 150     outb(CMD_ECHO, DATA);
 151     
 152     debug = 4;
 153     /* Wait for CDF=0. If any of the others are set, it's bad */
 154     WAIT(STATUS, STATMASK, 0, STST|DIAGF|INVDCMD|DF|CDF);
 155     
 156     debug = 5;
 157     /* The meaning of life */
 158     outb(42, DATA);
 159     
 160     debug = 6;
 161     /* Expect only DF, that is, data ready */
 162     WAIT(STATUS, STATMASK, DF, STST|DIAGF|CDF|INVDCMD);
 163     
 164     debug = 7;
 165     /* Is the answer correct? */
 166     if (inb(DATA) != 42) goto fail;
 167     
 168     debug = 8;
 169     /* Reading port should reset DF */
 170     if (inb(STATUS) & DF) goto fail;
 171     
 172     debug = 9;
 173     /* When HACC, command is completed, and we're though testing */
 174     WAIT(INTRFLAGS, HACC, HACC, 0);
 175     /* now initialize adapter */
 176     
 177     debug = 10;
 178     /* Clear interrupts */
 179     outb(IRST, CONTROL);
 180     
 181     debug = 11;
 182     
 183     return debug;                               /* 1 = ok */
 184   fail:
 185     return 0;                                   /* 0 = not ok */
 186 }
 187 
 188 /* What's this little function for? */
 189 char *aha1542_info(void)
     /*  */
 190 {
 191     static char buffer[] = "Adaptec 1542";
 192     return buffer;
 193 }
 194 
 195 /* A "high" level interrupt handler */
 196 void aha1542_intr_handle(void)
     /*  */
 197 {
 198     void (*my_done)(int, int) = do_done;
 199     int errstatus;
 200 
 201     do_done = NULL;
 202 #ifdef DEBUG
 203     printk("aha1542_intr_handle: ");
 204     if (!(flag&ANYINTR)) printk("no interrupt?");
 205     if (flag&MBIF) printk("MBIF ");
 206     if (flag&MBOA) printk("MBOF ");
 207     if (flag&HACC) printk("HACC ");
 208     if (flag&SCRD) printk("SCRD ");
 209     printk("status %02x\n", inb(STATUS));
 210     if (ccb.tarstat|ccb.hastat)
 211       printk("aha1542_command: returning %x (status %d)\n", ccb.tarstat + ((int) ccb.hastat << 16), mb[1].status);
 212 #endif
 213     aha1542_intr_reset();
 214     if (!my_done) {
 215         printk("aha1542_intr_handle: Unexpected interrupt\n");
 216         return;
 217     }
 218 
 219     /* is there mail :-) */
 220         
 221     if (!mb[1].status) {
 222         DEB(printk("aha1542_intr_handle: strange: mbif but no mail!\n"));
 223         my_done(aha1542_host, DID_TIME_OUT << 16);
 224         return;
 225     }
 226 
 227     /* more error checking left out here */
 228     if (mb[1].status != 1)
 229       /* This is surely wrong, but I don't know what's right */
 230       errstatus = makecode(ccb.hastat, ccb.tarstat);
 231     else
 232       errstatus = 0;
 233 
 234     mb[1].status = 0;
 235 
 236     if (ccb.tarstat == 2) {
 237         int i;
 238         DEB(printk("aha1542_intr_handle: sense:"));
 239         for (i = 0; i < 12; i++)
 240           printk("%02x ", ccb.cdb[ccb.cdblen+i]);
 241         printk("\n");
 242 /*
 243         DEB(printk("aha1542_intr_handle: buf:"));
 244         for (i = 0; i < bufflen; i++)
 245           printk("%02x ", ((unchar *)buff)[i]);
 246         printk("\n");
 247 */
 248     }
 249     DEB(if (errstatus) printk("aha1542_intr_handle: returning %6x\n", errstatus));
 250     my_done(aha1542_host, errstatus);
 251     return;
 252 }
 253 
 254 int aha1542_queuecommand(unchar target, const void *cmnd, void *buff, int bufflen, void (*done)(int, int))
     /*  */
 255 {
 256     unchar ahacmd = CMD_START_SCSI;
 257     unchar *cmd = (unchar *) cmnd;
 258     DEB(int i);
 259 
 260     DEB(if (target > 1) {done(aha1542_host, DID_TIME_OUT << 16); return 0;});
 261     
 262 #ifdef DEBUG
 263     if (*cmd == READ_10 || *cmd == WRITE_10)
 264       i = xscsi2int(cmd+2);
 265     else if (*cmd == READ_6 || *cmd == WRITE_6)
 266       i = scsi2int(cmd+2);
 267     else
 268       i = -1;
 269     if (done)
 270       printk("aha1542_queuecommand: dev %d cmd %02x pos %d len %d ", target, *cmd, i, bufflen);
 271     else
 272       printk("aha1542_command: dev %d cmd %02x pos %d len %d ", target, *cmd, i, bufflen);
 273     aha1542_stat();
 274     printk("aha1542_queuecommand: dumping scsi cmd:");
 275     for (i = 0; i < (*cmd<=0x1f?6:10); i++) printk("%02x ", cmd[i]);
 276     printk("\n");
 277     if (*cmd == WRITE_10 || *cmd == WRITE_6)
 278       return 0; /* we are still testing, so *don't* write */
 279 #endif
 280     memset(&ccb, 0, sizeof ccb);
 281     
 282     ccb.cdblen = (*cmd<=0x1f)?6:10;     /* SCSI Command Descriptor Block Length */
 283     
 284     memcpy(ccb.cdb, cmd, ccb.cdblen);
 285     ccb.op = 0;                         /* SCSI Initiator Command */
 286     ccb.idlun = (target&7)<<5;          /* SCSI Target Id */
 287     ccb.rsalen = 12;
 288     any2scsi(ccb.datalen, bufflen);
 289     any2scsi(ccb.dataptr, buff);
 290     ccb.linkptr[0] = ccb.linkptr[1] = ccb.linkptr[2] = 0;
 291     ccb.commlinkid = 0;
 292     
 293     mb[0].status = 1;
 294     mb[1].status = 0;
 295     
 296 #ifdef DEBUGd
 297     printk("aha1542_command: sending.. ");
 298     for (i = 0; i < sizeof(ccb)-10; i++)
 299       printk("%02x ", ((unchar *)&ccb)[i]);
 300 #endif
 301     
 302     if (done) {
 303         DEB(printk("aha1542_queuecommand: now waiting for interrupt "); aha1542_stat());
 304         if (do_done)
 305           printk("aha1542_queuecommand: Two concurrent queuecommand?\n");
 306         else
 307           do_done = done;
 308         aha1542_out(&ahacmd, 1);                /* start scsi command */
 309         DEB(aha1542_stat());
 310         aha1542_enable_intr();
 311     }
 312     else
 313       printk("aha1542_queuecommand: done can't be NULL\n");
 314     
 315     return 0;
 316 }
 317 
 318 volatile static int internal_done_flag = 0;
 319 volatile static int internal_done_errcode = 0;
 320 static void internal_done(int host, int errcode)
     /*  */
 321 {
 322     internal_done_errcode = errcode;
 323     ++internal_done_flag;
 324 }
 325 
 326 int aha1542_command(unchar target, const void *cmnd, void *buff, int bufflen)
     /*  */
 327 {
 328     DEB(printk("aha1542_command: ..calling aha1542_queuecommand\n"));
 329     aha1542_queuecommand(target, cmnd, buff, bufflen, internal_done);
 330 
 331     while (!internal_done_flag);
 332     internal_done_flag = 0;
 333     return internal_done_errcode;
 334 }
 335 
 336 /* Initialize mailboxes */
 337 static void setup_mailboxes()
     /*  */
 338 {
 339     static unchar cmd[5] = {CMD_MBINIT, 1};
 340     
 341     mb[0].status = mb[1].status = 0;
 342     aha1542_intr_reset();               /* reset interrupts, so they don't block */     
 343     any2scsi((cmd+2), mb);
 344     any2scsi(mb[0].ccbptr, &ccb);
 345     aha1542_out(cmd, 5);
 346     WAIT(INTRFLAGS, INTRMASK, HACC, 0);
 347     while (0) {
 348       fail:
 349         printk("aha1542_detect: failed setting up mailboxes\n");
 350     }
 351     aha1542_intr_reset();
 352 }
 353 
 354 /* a hack to avoid a strange compilation error */
 355 
 356 void call_buh()
     /*  */
 357 {
 358     set_intr_gate(0x2b,&aha1542_interrupt);
 359 }
 360 
 361 /* return non-zero on detection */
 362 int aha1542_detect(int hostnum)
     /*  */
 363 {
 364     int i;
 365 
 366     DEB(printk("aha1542_detect: \n"));
 367     
 368     if (!(i = aha1542_test_port())) {
 369         return 0;
 370     }
 371  
 372     /* Set the Bus on/off-times as not to ruin floppy performens */
 373     {
 374         static unchar oncmd[] = {CMD_BUSON_TIME, 5};
 375         static unchar offcmd[] = {CMD_BUSOFF_TIME, 9};
 376         
 377         aha1542_intr_reset();
 378         aha1542_out(oncmd, 2);
 379         WAIT(INTRFLAGS, INTRMASK, HACC, 0);
 380         aha1542_intr_reset();
 381         aha1542_out(offcmd, 2);
 382         WAIT(INTRFLAGS, INTRMASK, HACC, 0);
 383         while (0) {
 384           fail:
 385             printk("aha1542_detect: setting bus on/off-time failed\n");
 386         }
 387         aha1542_intr_reset();
 388     }
 389 
 390     aha1542_stat();
 391     setup_mailboxes();
 392 
 393     aha1542_stat();
 394 
 395     DEB(printk("aha1542_detect: enable interrupt channel %d\n", intr_chan));
 396     call_buh();
 397 
 398     if (intr_chan >= 8)
 399       outb(inb_p(0x21)&0xfb,0x21);              /* open for slave ?? */
 400 
 401     DEB(printk("aha1542_detect: enabling interrupts\n"));
 402     aha1542_enable_intr();
 403 
 404 #ifdef DEBUG
 405     DEB(printk(" *** READ CAPACITY ***\n"));
 406 
 407     {
 408         unchar buf[8];
 409         static unchar cmd[] = { READ_CAPACITY, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 410         int i;
 411         
 412         for (i = 0; i < sizeof(buf); ++i) buf[i] = 0x87;
 413         for (i = 0; i < 2; ++i)
 414           if (!aha1542_command(i, cmd, buf, sizeof(buf))) {
 415               printk("aha_detect: LU %d sector_size %d device_size %d\n",
 416                      i, xscsi2int(buf+4), xscsi2int(buf));
 417           }
 418     }
 419 
 420     DEB(printk(" *** NOW RUNNING MY OWN TEST *** \n"));
 421 
 422     for (i = 0; i < 4; ++i)
 423       {
 424           unsigned char cmd[10];
 425           static buffer[512];
 426           
 427           cmd[0] = READ_10;
 428           cmd[1] = 0;
 429           xany2scsi(cmd+2, i);
 430           cmd[6] = 0;
 431           cmd[7] = 0;
 432           cmd[8] = 1;
 433           cmd[9] = 0;
 434           aha1542_command(0, cmd, buffer, 512);
 435       }
 436 #endif
 437     aha1542_host = hostnum;
 438     return 1;
 439 }
 440 
 441 int aha1542_abort(int i)
     /*  */
 442 {
 443     DEB(printk("aha1542_abort\n"));
 444     return 0;
 445 }
 446 
 447 int aha1542_reset(void)
     /*  */
 448 {
 449     DEB(printk("aha1542_reset called\n"));
 450     return 0;
 451 }
 452 
 453 __asm__("
 454 _aha1542_interrupt:
 455         cld
 456         pushl %eax
 457         pushl %ecx
 458         pushl %edx
 459         push %ds
 460         push %es
 461         push %fs
 462         movl $0x10,%eax
 463         mov %ax,%ds
 464         mov %ax,%es
 465         movl $0x17,%eax
 466         mov %ax,%fs
 467         movb $0x20,%al
 468         outb %al,$0xA0          # EOI to interrupt controller #1
 469         jmp 1f                  # give port chance to breathe
 470 1:      jmp 1f
 471 1:      outb %al,$0x20
 472 # Please, someone, change this to use the timer
 473 #       andl $0xfffeffff,_timer_active
 474         movl $_aha1542_intr_handle,%edx
 475         call *%edx              # ``interesting'' way of handling intr.
 476         pop %fs
 477         pop %es
 478         pop %ds
 479         popl %edx
 480         popl %ecx
 481         popl %eax
 482         iret
 483 ");
/* */
root/kernel/blk_drv/scsi/aha1542.c

DEFINITIONS
