drivers/block/sym53c8xx.c

   1 /*
   2  * (C) Copyright 2001
   3  * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  * partly derived from
  23  * linux/drivers/scsi/sym53c8xx.c
  24  *
  25  */
  26
  27 /*
  28  * SCSI support based on the chip sym53C810.
  29  *
  30  * 09-19-2001 Andreas Heppel, Sysgo RTS GmbH <aheppel@sysgo.de>
  31  *              The local version of this driver for the BAB750 board does not
  32  *              use interrupts but polls the chip instead (see the call of
  33  *              'handle_scsi_int()' in 'scsi_issue()'.
  34  */
  35
  36 #include <common.h>
  37
  38 #include <command.h>
  39 #include <pci.h>
  40 #include <asm/processor.h>
  41 #include <sym53c8xx.h>
  42 #include <scsi.h>
  43
  44 #undef  SYM53C8XX_DEBUG
  45
  46 #ifdef  SYM53C8XX_DEBUG
  47 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  48 #else
  49 #define PRINTF(fmt,args...)
  50 #endif
  51
  52 #if defined(CONFIG_CMD_SCSI) && defined(CONFIG_SCSI_SYM53C8XX)
  53
  54 #undef SCSI_SINGLE_STEP
  55 /*
  56  * Single Step is only used for debug purposes
  57  */
  58 #ifdef SCSI_SINGLE_STEP
  59 static unsigned long start_script_select;
  60 static unsigned long start_script_msgout;
  61 static unsigned long start_script_msgin;
  62 static unsigned long start_script_msg_ext;
  63 static unsigned long start_script_cmd;
  64 static unsigned long start_script_data_in;
  65 static unsigned long start_script_data_out;
  66 static unsigned long start_script_status;
  67 static unsigned long start_script_complete;
  68 static unsigned long start_script_error;
  69 static unsigned long start_script_reselection;
  70 static unsigned int len_script_select;
  71 static unsigned int len_script_msgout;
  72 static unsigned int len_script_msgin;
  73 static unsigned int len_script_msg_ext;
  74 static unsigned int len_script_cmd;
  75 static unsigned int len_script_data_in;
  76 static unsigned int len_script_data_out;
  77 static unsigned int len_script_status;
  78 static unsigned int len_script_complete;
  79 static unsigned int len_script_error;
  80 static unsigned int len_script_reselection;
  81 #endif
  82
  83
  84 static unsigned short scsi_int_mask;    /* shadow register for SCSI related interrupts */
  85 static unsigned char  script_int_mask;  /* shadow register for SCRIPT related interrupts */
  86 static unsigned long script_select[8];  /* script for selection */
  87 static unsigned long script_msgout[8];  /* script for message out phase (NOT USED) */
  88 static unsigned long script_msgin[14];  /* script for message in phase */
  89 static unsigned long script_msg_ext[32]; /* script for message in phase when more than 1 byte message */
  90 static unsigned long script_cmd[18];    /* script for command phase */
  91 static unsigned long script_data_in[8]; /* script for data in phase */
  92 static unsigned long script_data_out[8]; /* script for data out phase */
  93 static unsigned long script_status[6]; /* script for status phase */
  94 static unsigned long script_complete[10]; /* script for complete */
  95 static unsigned long script_reselection[4]; /* script for reselection (NOT USED) */
  96 static unsigned long script_error[2]; /* script for error handling */
  97
  98 static unsigned long int_stat[3]; /* interrupt status */
  99 static unsigned long scsi_mem_addr; /* base memory address =SCSI_MEM_ADDRESS; */
 100
 101 #define bus_to_phys(a)  pci_mem_to_phys(busdevfunc, (unsigned long) (a))
 102 #define phys_to_bus(a)  pci_phys_to_mem(busdevfunc, (unsigned long) (a))
 103
 104 #define SCSI_MAX_RETRY 3 /* number of retries in scsi_issue() */
 105
 106 #define SCSI_MAX_RETRY_NOT_READY 10 /* number of retries when device is not ready */
 107 #define SCSI_NOT_READY_TIME_OUT 500 /* timeout per retry when not ready */
 108
 109 /*********************************************************************************
 110  * forward declerations
 111  */
 112
 113 void scsi_chip_init(void);
 114 void handle_scsi_int(void);
 115
 116
 117 /********************************************************************************
 118  * reports SCSI errors to the user
 119  */
 120 void scsi_print_error (ccb * pccb)
 121 {
 122         int i;
 123
 124         printf ("SCSI Error: Target %d LUN %d Command %02X\n", pccb->target,
 125                 pccb->lun, pccb->cmd[0]);
 126         printf ("       CCB: ");
 127         for (i = 0; i < pccb->cmdlen; i++)
 128                 printf ("%02X ", pccb->cmd[i]);
 129         printf ("(len=%d)\n", pccb->cmdlen);
 130         printf ("     Cntrl: ");
 131         switch (pccb->contr_stat) {
 132         case SIR_COMPLETE:
 133                 printf ("Complete (no Error)\n");
 134                 break;
 135         case SIR_SEL_ATN_NO_MSG_OUT:
 136                 printf ("Selected with ATN no MSG out phase\n");
 137                 break;
 138         case SIR_CMD_OUT_ILL_PH:
 139                 printf ("Command out illegal phase\n");
 140                 break;
 141         case SIR_MSG_RECEIVED:
 142                 printf ("MSG received Error\n");
 143                 break;
 144         case SIR_DATA_IN_ERR:
 145                 printf ("Data in Error\n");
 146                 break;
 147         case SIR_DATA_OUT_ERR:
 148                 printf ("Data out Error\n");
 149                 break;
 150         case SIR_SCRIPT_ERROR:
 151                 printf ("Script Error\n");
 152                 break;
 153         case SIR_MSG_OUT_NO_CMD:
 154                 printf ("MSG out no Command phase\n");
 155                 break;
 156         case SIR_MSG_OVER7:
 157                 printf ("MSG in over 7 bytes\n");
 158                 break;
 159         case INT_ON_FY:
 160                 printf ("Interrupt on fly\n");
 161                 break;
 162         case SCSI_SEL_TIME_OUT:
 163                 printf ("SCSI Selection Timeout\n");
 164                 break;
 165         case SCSI_HNS_TIME_OUT:
 166                 printf ("SCSI Handshake Timeout\n");
 167                 break;
 168         case SCSI_MA_TIME_OUT:
 169                 printf ("SCSI Phase Error\n");
 170                 break;
 171         case SCSI_UNEXP_DIS:
 172                 printf ("SCSI unexpected disconnect\n");
 173                 break;
 174         default:
 175                 printf ("unknown status %lx\n", pccb->contr_stat);
 176                 break;
 177         }
 178         printf ("     Sense: SK %x (", pccb->sense_buf[2] & 0x0f);
 179         switch (pccb->sense_buf[2] & 0xf) {
 180         case SENSE_NO_SENSE:
 181                 printf ("No Sense)");
 182                 break;
 183         case SENSE_RECOVERED_ERROR:
 184                 printf ("Recovered Error)");
 185                 break;
 186         case SENSE_NOT_READY:
 187                 printf ("Not Ready)");
 188                 break;
 189         case SENSE_MEDIUM_ERROR:
 190                 printf ("Medium Error)");
 191                 break;
 192         case SENSE_HARDWARE_ERROR:
 193                 printf ("Hardware Error)");
 194                 break;
 195         case SENSE_ILLEGAL_REQUEST:
 196                 printf ("Illegal request)");
 197                 break;
 198         case SENSE_UNIT_ATTENTION:
 199                 printf ("Unit Attention)");
 200                 break;
 201         case SENSE_DATA_PROTECT:
 202                 printf ("Data Protect)");
 203                 break;
 204         case SENSE_BLANK_CHECK:
 205                 printf ("Blank check)");
 206                 break;
 207         case SENSE_VENDOR_SPECIFIC:
 208                 printf ("Vendor specific)");
 209                 break;
 210         case SENSE_COPY_ABORTED:
 211                 printf ("Copy aborted)");
 212                 break;
 213         case SENSE_ABORTED_COMMAND:
 214                 printf ("Aborted Command)");
 215                 break;
 216         case SENSE_VOLUME_OVERFLOW:
 217                 printf ("Volume overflow)");
 218                 break;
 219         case SENSE_MISCOMPARE:
 220                 printf ("Misscompare\n");
 221                 break;
 222         default:
 223                 printf ("Illegal Sensecode\n");
 224                 break;
 225         }
 226         printf (" ASC %x ASCQ %x\n", pccb->sense_buf[12],
 227                 pccb->sense_buf[13]);
 228         printf ("    Status: ");
 229         switch (pccb->status) {
 230         case S_GOOD:
 231                 printf ("Good\n");
 232                 break;
 233         case S_CHECK_COND:
 234                 printf ("Check condition\n");
 235                 break;
 236         case S_COND_MET:
 237                 printf ("Condition Met\n");
 238                 break;
 239         case S_BUSY:
 240                 printf ("Busy\n");
 241                 break;
 242         case S_INT:
 243                 printf ("Intermediate\n");
 244                 break;
 245         case S_INT_COND_MET:
 246                 printf ("Intermediate condition met\n");
 247                 break;
 248         case S_CONFLICT:
 249                 printf ("Reservation conflict\n");
 250                 break;
 251         case S_TERMINATED:
 252                 printf ("Command terminated\n");
 253                 break;
 254         case S_QUEUE_FULL:
 255                 printf ("Task set full\n");
 256                 break;
 257         default:
 258                 printf ("unknown: %02X\n", pccb->status);
 259                 break;
 260         }
 261
 262 }
 263
 264
 265 /******************************************************************************
 266  * sets-up the SCSI controller
 267  * the base memory address is retrived via the pci_read_config_dword
 268  */
 269 void scsi_low_level_init(int busdevfunc)
 270 {
 271         unsigned int cmd;
 272         unsigned int addr;
 273         unsigned char vec;
 274
 275         pci_read_config_byte(busdevfunc, PCI_INTERRUPT_LINE, &vec);
 276         pci_read_config_dword(busdevfunc, PCI_BASE_ADDRESS_1, &addr);
 277
 278         addr = bus_to_phys(addr & ~0xf);
 279
 280         /*
 281          * Enable bus mastering in case this has not been done, yet.
 282          */
 283         pci_read_config_dword(busdevfunc, PCI_COMMAND, &cmd);
 284         cmd |= PCI_COMMAND_MASTER;
 285         pci_write_config_dword(busdevfunc, PCI_COMMAND, cmd);
 286
 287         scsi_mem_addr = addr;
 288
 289         scsi_chip_init();
 290         scsi_bus_reset();
 291 }
 292
 293
 294 /************************************************************************************
 295  * Low level Part of SCSI Driver
 296  */
 297
 298 /*
 299  * big-endian -> little endian conversion for the script
 300  */
 301 unsigned long swap_script(unsigned long val)
 302 {
 303         unsigned long tmp;
 304         tmp = ((val>>24)&0xff) | ((val>>8)&0xff00) | ((val<<8)&0xff0000) | ((val<<24)&0xff000000);
 305         return tmp;
 306 }
 307
 308
 309 void scsi_write_byte(ulong offset,unsigned char val)
 310 {
 311         out8(scsi_mem_addr+offset,val);
 312 }
 313
 314
 315 unsigned char scsi_read_byte(ulong offset)
 316 {
 317         return(in8(scsi_mem_addr+offset));
 318 }
 319
 320
 321 /********************************************************************************
 322  * interrupt handler
 323  */
 324 void handle_scsi_int(void)
 325 {
 326         unsigned char stat,stat1,stat2;
 327         unsigned short sstat;
 328         int i;
 329 #ifdef SCSI_SINGLE_STEP
 330         unsigned long tt;
 331 #endif
 332         stat=scsi_read_byte(ISTAT);
 333         if((stat & DIP)==DIP) { /* DMA Interrupt pending */
 334                 stat1=scsi_read_byte(DSTAT);
 335 #ifdef SCSI_SINGLE_STEP
 336                 if((stat1 & SSI)==SSI) {
 337                         tt=in32r(scsi_mem_addr+DSP);
 338                         if(((tt)>=start_script_select) && ((tt)<start_script_select+len_script_select)) {
 339                                 printf("select %d\n",(tt-start_script_select)>>2);
 340                                 goto end_single;
 341                         }
 342                         if(((tt)>=start_script_msgout) && ((tt)<start_script_msgout+len_script_msgout)) {
 343                                 printf("msgout %d\n",(tt-start_script_msgout)>>2);
 344                                 goto end_single;
 345                         }
 346                         if(((tt)>=start_script_msgin) && ((tt)<start_script_msgin+len_script_msgin)) {
 347                                 printf("msgin %d\n",(tt-start_script_msgin)>>2);
 348                                 goto end_single;
 349                         }
 350                         if(((tt)>=start_script_msg_ext) && ((tt)<start_script_msg_ext+len_script_msg_ext)) {
 351                                 printf("msgin_ext %d\n",(tt-start_script_msg_ext)>>2);
 352                                 goto end_single;
 353                         }
 354                         if(((tt)>=start_script_cmd) && ((tt)<start_script_cmd+len_script_cmd)) {
 355                                 printf("cmd %d\n",(tt-start_script_cmd)>>2);
 356                                 goto end_single;
 357                         }
 358                         if(((tt)>=start_script_data_in) && ((tt)<start_script_data_in+len_script_data_in)) {
 359                                 printf("data_in %d\n",(tt-start_script_data_in)>>2);
 360                                 goto end_single;
 361                         }
 362                         if(((tt)>=start_script_data_out) && ((tt)<start_script_data_out+len_script_data_out)) {
 363                                 printf("data_out %d\n",(tt-start_script_data_out)>>2);
 364                                 goto end_single;
 365                         }
 366                         if(((tt)>=start_script_status) && ((tt)<start_script_status+len_script_status)) {
 367                                 printf("status %d\n",(tt-start_script_status)>>2);
 368                                 goto end_single;
 369                         }
 370                         if(((tt)>=start_script_complete) && ((tt)<start_script_complete+len_script_complete)) {
 371                                 printf("complete %d\n",(tt-start_script_complete)>>2);
 372                                 goto end_single;
 373                         }
 374                         if(((tt)>=start_script_error) && ((tt)<start_script_error+len_script_error)) {
 375                                 printf("error %d\n",(tt-start_script_error)>>2);
 376                                 goto end_single;
 377                         }
 378                         if(((tt)>=start_script_reselection) && ((tt)<start_script_reselection+len_script_reselection)) {
 379                                 printf("reselection %d\n",(tt-start_script_reselection)>>2);
 380                                 goto end_single;
 381                         }
 382                         printf("sc: %lx\n",tt);
 383 end_single:
 384                         stat2=scsi_read_byte(DCNTL);
 385                         stat2|=STD;
 386                         scsi_write_byte(DCNTL,stat2);
 387                 }
 388 #endif
 389                 if((stat1 & SIR)==SIR) /* script interrupt */
 390                 {
 391                         int_stat[0]=in32(scsi_mem_addr+DSPS);
 392                 }
 393                 if((stat1 & DFE)==0) { /* fifo not epmty */
 394                         scsi_write_byte(CTEST3,CLF); /* Clear DMA FIFO */
 395                         stat2=scsi_read_byte(STEST3);
 396                         scsi_write_byte(STEST3,(stat2 | CSF)); /* Clear SCSI FIFO */
 397                 }
 398         }
 399         if((stat & SIP)==SIP) {  /* scsi interrupt */
 400                 sstat = (unsigned short)scsi_read_byte(SIST+1);
 401                 sstat <<=8;
 402                 sstat |= (unsigned short)scsi_read_byte(SIST);
 403                 for(i=0;i<3;i++) {
 404                         if(int_stat[i]==0)
 405                                 break; /* found an empty int status */
 406                 }
 407                 int_stat[i]=SCSI_INT_STATE | sstat;
 408                 stat1=scsi_read_byte(DSTAT);
 409                 if((stat1 & DFE)==0) { /* fifo not epmty */
 410                         scsi_write_byte(CTEST3,CLF); /* Clear DMA FIFO */
 411                         stat2=scsi_read_byte(STEST3);
 412                         scsi_write_byte(STEST3,(stat2 | CSF)); /* Clear SCSI FIFO */
 413                 }
 414         }
 415         if((stat & INTF)==INTF) { /* interrupt on Fly */
 416                 scsi_write_byte(ISTAT,stat); /* clear it */
 417                 for(i=0;i<3;i++) {
 418                         if(int_stat[i]==0)
 419                                 break; /* found an empty int status */
 420                 }
 421                 int_stat[i]=INT_ON_FY;
 422         }
 423 }
 424
 425 void scsi_bus_reset(void)
 426 {
 427         unsigned char t;
 428         int i;
 429         int end = CONFIG_SYS_SCSI_SPIN_UP_TIME*1000;
 430
 431         t=scsi_read_byte(SCNTL1);
 432         scsi_write_byte(SCNTL1,(t | CRST));
 433         udelay(50);
 434         scsi_write_byte(SCNTL1,t);
 435
 436         puts("waiting for devices to spin up");
 437         for(i=0;i<end;i++) {
 438                 udelay(1000); /* give the devices time to spin up */
 439                 if (i % 1000 == 0)
 440                         putc('.');
 441         }
 442         putc('\n');
 443         scsi_chip_init(); /* reinit the chip ...*/
 444
 445 }
 446
 447 void scsi_int_enable(void)
 448 {
 449         scsi_write_byte(SIEN,(unsigned char)scsi_int_mask);
 450         scsi_write_byte(SIEN+1,(unsigned char)(scsi_int_mask>>8));
 451         scsi_write_byte(DIEN,script_int_mask);
 452 }
 453
 454 void scsi_write_dsp(unsigned long start)
 455 {
 456         unsigned long val;
 457 #ifdef SCSI_SINGLE_STEP
 458         unsigned char t;
 459 #endif
 460         val = start;
 461         out32r(scsi_mem_addr + DSP,start);
 462 #ifdef SCSI_SINGLE_STEP
 463         t=scsi_read_byte(DCNTL);
 464   t|=STD;
 465         scsi_write_byte(DCNTL,t);
 466 #endif
 467 }
 468
 469 /* only used for debug purposes */
 470 void scsi_print_script(void)
 471 {
 472         printf("script_select @         0x%08lX\n",(unsigned long)&script_select[0]);
 473         printf("script_msgout @         0x%08lX\n",(unsigned long)&script_msgout[0]);
 474         printf("script_msgin @          0x%08lX\n",(unsigned long)&script_msgin[0]);
 475         printf("script_msgext @         0x%08lX\n",(unsigned long)&script_msg_ext[0]);
 476         printf("script_cmd @            0x%08lX\n",(unsigned long)&script_cmd[0]);
 477         printf("script_data_in @        0x%08lX\n",(unsigned long)&script_data_in[0]);
 478         printf("script_data_out @       0x%08lX\n",(unsigned long)&script_data_out[0]);
 479         printf("script_status @         0x%08lX\n",(unsigned long)&script_status[0]);
 480         printf("script_complete @       0x%08lX\n",(unsigned long)&script_complete[0]);
 481         printf("script_error @          0x%08lX\n",(unsigned long)&script_error[0]);
 482 }
 483
 484
 485 void scsi_set_script(ccb *pccb)
 486 {
 487         int busdevfunc = pccb->priv;
 488         int i;
 489         i=0;
 490         script_select[i++]=swap_script(SCR_REG_REG(GPREG, SCR_AND, 0xfe));
 491         script_select[i++]=0; /* LED ON */
 492         script_select[i++]=swap_script(SCR_CLR(SCR_TRG)); /* select initiator mode */
 493         script_select[i++]=0;
 494         /* script_select[i++]=swap_script(SCR_SEL_ABS_ATN | pccb->target << 16); */
 495         script_select[i++]=swap_script(SCR_SEL_ABS | pccb->target << 16);
 496         script_select[i++]=swap_script(phys_to_bus(&script_cmd[4])); /* error handling */
 497         script_select[i++]=swap_script(SCR_JUMP); /* next section */
 498         /*      script_select[i++]=swap_script((unsigned long)&script_msgout[0]); */ /* message out */
 499         script_select[i++]=swap_script(phys_to_bus(&script_cmd[0])); /* command out */
 500
 501 #ifdef SCSI_SINGLE_STEP
 502         start_script_select=(unsigned long)&script_select[0];
 503         len_script_select=i*4;
 504 #endif
 505
 506         i=0;
 507         script_msgout[i++]=swap_script(SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)));
 508         script_msgout[i++]=SIR_SEL_ATN_NO_MSG_OUT;
 509         script_msgout[i++]=swap_script( SCR_MOVE_ABS(1) ^ SCR_MSG_OUT);
 510         script_msgout[i++]=swap_script(phys_to_bus(&pccb->msgout[0]));
 511         script_msgout[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_COMMAND))); /* if Command phase */
 512         script_msgout[i++]=swap_script(phys_to_bus(&script_cmd[0])); /* switch to command */
 513         script_msgout[i++]=swap_script(SCR_INT); /* interrupt if not */
 514         script_msgout[i++]=SIR_MSG_OUT_NO_CMD;
 515
 516 #ifdef SCSI_SINGLE_STEP
 517         start_script_msgout=(unsigned long)&script_msgout[0];
 518         len_script_msgout=i*4;
 519 #endif
 520         i=0;
 521         script_cmd[i++]=swap_script(SCR_MOVE_ABS(pccb->cmdlen) ^ SCR_COMMAND);
 522         script_cmd[i++]=swap_script(phys_to_bus(&pccb->cmd[0]));
 523         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN))); /* message in ? */
 524         script_cmd[i++]=swap_script(phys_to_bus(&script_msgin[0]));
 525         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_DATA_OUT))); /* data out ? */
 526         script_cmd[i++]=swap_script(phys_to_bus(&script_data_out[0]));
 527         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_DATA_IN))); /* data in ? */
 528         script_cmd[i++]=swap_script(phys_to_bus(&script_data_in[0]));
 529         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_STATUS)));  /* status ? */
 530         script_cmd[i++]=swap_script(phys_to_bus(&script_status[0]));
 531         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND)));  /* command ? */
 532         script_cmd[i++]=swap_script(phys_to_bus(&script_cmd[0]));
 533         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT)));  /* message out ? */
 534         script_cmd[i++]=swap_script(phys_to_bus(&script_msgout[0]));
 535         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_MSG_IN))); /* just for error handling message in ? */
 536         script_cmd[i++]=swap_script(phys_to_bus(&script_msgin[0]));
 537         script_cmd[i++]=swap_script(SCR_INT); /* interrupt if not */
 538         script_cmd[i++]=SIR_CMD_OUT_ILL_PH;
 539 #ifdef SCSI_SINGLE_STEP
 540         start_script_cmd=(unsigned long)&script_cmd[0];
 541         len_script_cmd=i*4;
 542 #endif
 543         i=0;
 544         script_data_out[i++]=swap_script(SCR_MOVE_ABS(pccb->datalen)^ SCR_DATA_OUT); /* move */
 545         script_data_out[i++]=swap_script(phys_to_bus(pccb->pdata)); /* pointer to buffer */
 546         script_data_out[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_STATUS)));
 547         script_data_out[i++]=swap_script(phys_to_bus(&script_status[0]));
 548         script_data_out[i++]=swap_script(SCR_INT);
 549         script_data_out[i++]=SIR_DATA_OUT_ERR;
 550
 551 #ifdef SCSI_SINGLE_STEP
 552         start_script_data_out=(unsigned long)&script_data_out[0];
 553         len_script_data_out=i*4;
 554 #endif
 555         i=0;
 556         script_data_in[i++]=swap_script(SCR_MOVE_ABS(pccb->datalen)^ SCR_DATA_IN); /* move  */
 557         script_data_in[i++]=swap_script(phys_to_bus(pccb->pdata)); /* pointer to buffer */
 558         script_data_in[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_STATUS)));
 559         script_data_in[i++]=swap_script(phys_to_bus(&script_status[0]));
 560         script_data_in[i++]=swap_script(SCR_INT);
 561         script_data_in[i++]=SIR_DATA_IN_ERR;
 562 #ifdef SCSI_SINGLE_STEP
 563         start_script_data_in=(unsigned long)&script_data_in[0];
 564         len_script_data_in=i*4;
 565 #endif
 566         i=0;
 567         script_msgin[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN);
 568         script_msgin[i++]=swap_script(phys_to_bus(&pccb->msgin[0]));
 569         script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_COMPLETE)));
 570         script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
 571         script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_DISCONNECT)));
 572         script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
 573         script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_SAVE_DP)));
 574         script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
 575         script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_RESTORE_DP)));
 576         script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
 577         script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)));
 578         script_msgin[i++]=swap_script(phys_to_bus(&script_msg_ext[0]));
 579         script_msgin[i++]=swap_script(SCR_INT);
 580         script_msgin[i++]=SIR_MSG_RECEIVED;
 581 #ifdef SCSI_SINGLE_STEP
 582         start_script_msgin=(unsigned long)&script_msgin[0];
 583         len_script_msgin=i*4;
 584 #endif
 585         i=0;
 586         script_msg_ext[i++]=swap_script(SCR_CLR (SCR_ACK)); /* clear ACK */
 587         script_msg_ext[i++]=0;
 588         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* assuming this is the msg length */
 589         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[1]));
 590         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 591         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 592         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
 593         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[2]));
 594         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 595         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 596         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
 597         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[3]));
 598         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 599         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 600         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
 601         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[4]));
 602         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 603         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 604         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
 605         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[5]));
 606         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 607         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 608         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
 609         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[6]));
 610         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 611         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 612         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
 613         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[7]));
 614         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 615         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 616         script_msg_ext[i++]=swap_script(SCR_INT);
 617         script_msg_ext[i++]=SIR_MSG_OVER7;
 618 #ifdef SCSI_SINGLE_STEP
 619         start_script_msg_ext=(unsigned long)&script_msg_ext[0];
 620         len_script_msg_ext=i*4;
 621 #endif
 622         i=0;
 623         script_status[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_STATUS);
 624         script_status[i++]=swap_script(phys_to_bus(&pccb->status));
 625         script_status[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)));
 626         script_status[i++]=swap_script(phys_to_bus(&script_msgin[0]));
 627         script_status[i++]=swap_script(SCR_INT);
 628         script_status[i++]=SIR_STATUS_ILL_PH;
 629 #ifdef SCSI_SINGLE_STEP
 630         start_script_status=(unsigned long)&script_status[0];
 631         len_script_status=i*4;
 632 #endif
 633         i=0;
 634         script_complete[i++]=swap_script(SCR_REG_REG (SCNTL2, SCR_AND, 0x7f));
 635         script_complete[i++]=0;
 636         script_complete[i++]=swap_script(SCR_CLR (SCR_ACK|SCR_ATN));
 637         script_complete[i++]=0;
 638         script_complete[i++]=swap_script(SCR_WAIT_DISC);
 639         script_complete[i++]=0;
 640         script_complete[i++]=swap_script(SCR_REG_REG(GPREG, SCR_OR, 0x01));
 641         script_complete[i++]=0; /* LED OFF */
 642         script_complete[i++]=swap_script(SCR_INT);
 643         script_complete[i++]=SIR_COMPLETE;
 644 #ifdef SCSI_SINGLE_STEP
 645         start_script_complete=(unsigned long)&script_complete[0];
 646         len_script_complete=i*4;
 647 #endif
 648         i=0;
 649         script_error[i++]=swap_script(SCR_INT); /* interrupt if error */
 650         script_error[i++]=SIR_SCRIPT_ERROR;
 651 #ifdef SCSI_SINGLE_STEP
 652         start_script_error=(unsigned long)&script_error[0];
 653         len_script_error=i*4;
 654 #endif
 655         i=0;
 656         script_reselection[i++]=swap_script(SCR_CLR (SCR_TRG)); /* target status */
 657         script_reselection[i++]=0;
 658         script_reselection[i++]=swap_script(SCR_WAIT_RESEL);
 659         script_reselection[i++]=swap_script(phys_to_bus(&script_select[0])); /* len = 4 */
 660 #ifdef SCSI_SINGLE_STEP
 661         start_script_reselection=(unsigned long)&script_reselection[0];
 662         len_script_reselection=i*4;
 663 #endif
 664 }
 665
 666
 667 void scsi_issue(ccb *pccb)
 668 {
 669         int busdevfunc = pccb->priv;
 670         int i;
 671         unsigned short sstat;
 672         int retrycnt;  /* retry counter */
 673         for(i=0;i<3;i++)
 674                 int_stat[i]=0; /* delete all int status */
 675         /* struct pccb must be set-up correctly */
 676         retrycnt=0;
 677         PRINTF("ID %d issue cmd %02X\n",pccb->target,pccb->cmd[0]);
 678         pccb->trans_bytes=0; /* no bytes transfered yet */
 679         scsi_set_script(pccb); /* fill in SCRIPT                */
 680         scsi_int_mask=STO | UDC | MA; /* | CMP; / * Interrupts which are enabled */
 681         script_int_mask=0xff; /* enable all Ints */
 682         scsi_int_enable();
 683         scsi_write_dsp(phys_to_bus(&script_select[0])); /* start script */
 684         /* now we have to wait for IRQs */
 685 retry:
 686         /*
 687          * This version of the driver is _not_ interrupt driven,
 688          * but polls the chip's interrupt registers (ISTAT, DSTAT).
 689          */
 690         while(int_stat[0]==0)
 691                 handle_scsi_int();
 692
 693         if(int_stat[0]==SIR_COMPLETE) {
 694                 if(pccb->msgin[0]==M_DISCONNECT) {
 695                         PRINTF("Wait for reselection\n");
 696                         for(i=0;i<3;i++)
 697                                 int_stat[i]=0; /* delete all int status */
 698                         scsi_write_dsp(phys_to_bus(&script_reselection[0])); /* start reselection script */
 699                         goto retry;
 700                 }
 701                 pccb->contr_stat=SIR_COMPLETE;
 702                 return;
 703         }
 704         if((int_stat[0] & SCSI_INT_STATE)==SCSI_INT_STATE) { /* scsi interrupt */
 705                 sstat=(unsigned short)int_stat[0];
 706                 if((sstat & STO)==STO) { /* selection timeout */
 707                         pccb->contr_stat=SCSI_SEL_TIME_OUT;
 708                         scsi_write_byte(GPREG,0x01);
 709                         PRINTF("ID: %X Selection Timeout\n",pccb->target);
 710                         return;
 711                 }
 712                 if((sstat & UDC)==UDC) { /* unexpected disconnect */
 713                         pccb->contr_stat=SCSI_UNEXP_DIS;
 714                         scsi_write_byte(GPREG,0x01);
 715                         PRINTF("ID: %X Unexpected Disconnect\n",pccb->target);
 716                         return;
 717                 }
 718                 if((sstat & RSL)==RSL) { /* reselection */
 719                         pccb->contr_stat=SCSI_UNEXP_DIS;
 720                         scsi_write_byte(GPREG,0x01);
 721                         PRINTF("ID: %X Unexpected Disconnect\n",pccb->target);
 722                         return;
 723                 }
 724                 if(((sstat & MA)==MA)||((sstat & HTH)==HTH)) { /* phase missmatch */
 725                         if(retrycnt<SCSI_MAX_RETRY) {
 726                                 pccb->trans_bytes=pccb->datalen -
 727                                         ((unsigned long)scsi_read_byte(DBC) |
 728                                         ((unsigned long)scsi_read_byte(DBC+1)<<8) |
 729                                         ((unsigned long)scsi_read_byte(DBC+2)<<16));
 730                                 for(i=0;i<3;i++)
 731                                         int_stat[i]=0; /* delete all int status */
 732                                 retrycnt++;
 733                                 PRINTF("ID: %X Phase Missmatch Retry %d Phase %02X transfered %lx\n",
 734                                                 pccb->target,retrycnt,scsi_read_byte(SBCL),pccb->trans_bytes);
 735                                 scsi_write_dsp(phys_to_bus(&script_cmd[4])); /* start retry script */
 736                                 goto retry;
 737                         }
 738                         if((sstat & MA)==MA)
 739                                 pccb->contr_stat=SCSI_MA_TIME_OUT;
 740                         else
 741                                 pccb->contr_stat=SCSI_HNS_TIME_OUT;
 742                         PRINTF("Phase Missmatch stat %lx\n",pccb->contr_stat);
 743                         return;
 744                 } /* no phase int */
 745 /*              if((sstat & CMP)==CMP) {
 746                         pccb->contr_stat=SIR_COMPLETE;
 747                         return;
 748                 }
 749 */
 750                 PRINTF("SCSI INT %lX\n",int_stat[0]);
 751                 pccb->contr_stat=int_stat[0];
 752                 return;
 753         } /* end scsi int */
 754         PRINTF("SCRIPT INT %lX phase %02X\n",int_stat[0],scsi_read_byte(SBCL));
 755         pccb->contr_stat=int_stat[0];
 756         return;
 757 }
 758
 759 int scsi_exec(ccb *pccb)
 760 {
 761         unsigned char tmpcmd[16],tmpstat;
 762         int i,retrycnt,t;
 763         unsigned long transbytes,datalen;
 764         unsigned char *tmpptr;
 765         retrycnt=0;
 766 retry:
 767         scsi_issue(pccb);
 768         if(pccb->contr_stat!=SIR_COMPLETE)
 769                 return FALSE;
 770         if(pccb->status==S_GOOD)
 771                 return TRUE;
 772         if(pccb->status==S_CHECK_COND) { /* check condition */
 773                 for(i=0;i<16;i++)
 774                         tmpcmd[i]=pccb->cmd[i];
 775                 pccb->cmd[0]=SCSI_REQ_SENSE;
 776                 pccb->cmd[1]=pccb->lun<<5;
 777                 pccb->cmd[2]=0;
 778                 pccb->cmd[3]=0;
 779                 pccb->cmd[4]=14;
 780                 pccb->cmd[5]=0;
 781                 pccb->cmdlen=6;
 782                 pccb->msgout[0]=SCSI_IDENTIFY;
 783                 transbytes=pccb->trans_bytes;
 784                 tmpptr=pccb->pdata;
 785                 pccb->pdata = &pccb->sense_buf[0];
 786                 datalen=pccb->datalen;
 787                 pccb->datalen=14;
 788                 tmpstat=pccb->status;
 789                 scsi_issue(pccb);
 790                 for(i=0;i<16;i++)
 791                         pccb->cmd[i]=tmpcmd[i];
 792                 pccb->trans_bytes=transbytes;
 793                 pccb->pdata=tmpptr;
 794                 pccb->datalen=datalen;
 795                 pccb->status=tmpstat;
 796                 PRINTF("Request_sense sense key %x ASC %x ASCQ %x\n",pccb->sense_buf[2]&0x0f,
 797                         pccb->sense_buf[12],pccb->sense_buf[13]);
 798                 switch(pccb->sense_buf[2]&0xf) {
 799                         case SENSE_NO_SENSE:
 800                         case SENSE_RECOVERED_ERROR:
 801                                 /* seems to be ok */
 802                                 return TRUE;
 803                                 break;
 804                         case SENSE_NOT_READY:
 805                                 if((pccb->sense_buf[12]!=0x04)||(pccb->sense_buf[13]!=0x01)) {
 806                                         /* if device is not in process of becoming ready */
 807                                         return FALSE;
 808                                         break;
 809                                 } /* else fall through */
 810                         case SENSE_UNIT_ATTENTION:
 811                                 if(retrycnt<SCSI_MAX_RETRY_NOT_READY) {
 812                                         PRINTF("Target %d not ready, retry %d\n",pccb->target,retrycnt);
 813                                         for(t=0;t<SCSI_NOT_READY_TIME_OUT;t++)
 814                                                 udelay(1000); /* 1sec wait */
 815                                         retrycnt++;
 816                                         goto retry;
 817                                 }
 818                                 PRINTF("Target %d not ready, %d retried\n",pccb->target,retrycnt);
 819                                 return FALSE;
 820                         default:
 821                                 return FALSE;
 822                 }
 823         }
 824         PRINTF("Status = %X\n",pccb->status);
 825         return FALSE;
 826 }
 827
 828
 829 void scsi_chip_init(void)
 830 {
 831         /* first we issue a soft reset */
 832         scsi_write_byte(ISTAT,SRST);
 833         udelay(1000);
 834         scsi_write_byte(ISTAT,0);
 835         /* setup chip */
 836         scsi_write_byte(SCNTL0,0xC0); /* full arbitration no start, no message, parity disabled, master */
 837         scsi_write_byte(SCNTL1,0x00);
 838         scsi_write_byte(SCNTL2,0x00);
 839 #ifndef CONFIG_SYS_SCSI_SYM53C8XX_CCF    /* config value for none 40 MHz clocks */
 840         scsi_write_byte(SCNTL3,0x13); /* synchronous clock 40/4=10MHz, asynchronous 40MHz */
 841 #else
 842         scsi_write_byte(SCNTL3,CONFIG_SYS_SCSI_SYM53C8XX_CCF); /* config value for none 40 MHz clocks */
 843 #endif
 844         scsi_write_byte(SCID,0x47); /* ID=7, enable reselection */
 845         scsi_write_byte(SXFER,0x00); /* synchronous transfer period 10MHz, asynchronous */
 846         scsi_write_byte(SDID,0x00);  /* targed SCSI ID = 0 */
 847         scsi_int_mask=0x0000; /* no Interrupt is enabled */
 848         script_int_mask=0x00;
 849         scsi_int_enable();
 850         scsi_write_byte(GPREG,0x01); /* GPIO0 is LED (off) */
 851         scsi_write_byte(GPCNTL,0x0E); /* GPIO0 is Output */
 852         scsi_write_byte(STIME0,0x08); /* handshake timer disabled, selection timeout 512msec */
 853         scsi_write_byte(RESPID,0x80); /* repond only to the own ID (reselection) */
 854         scsi_write_byte(STEST1,0x00); /* not isolated, SCLK is used */
 855         scsi_write_byte(STEST2,0x00); /* no Lowlevel Mode? */
 856         scsi_write_byte(STEST3,0x80); /* enable tolerANT */
 857         scsi_write_byte(CTEST3,0x04); /* clear FIFO */
 858         scsi_write_byte(CTEST4,0x00);
 859         scsi_write_byte(CTEST5,0x00);
 860 #ifdef SCSI_SINGLE_STEP
 861 /*      scsi_write_byte(DCNTL,IRQM | SSM);      */
 862         scsi_write_byte(DCNTL,IRQD | SSM);
 863         scsi_write_byte(DMODE,MAN);
 864 #else
 865 /*      scsi_write_byte(DCNTL,IRQM);    */
 866         scsi_write_byte(DCNTL,IRQD);
 867         scsi_write_byte(DMODE,0x00);
 868 #endif
 869 }
 870 #endif