drivers/block/sym53c8xx.c

   1 /*
   2  * (C) Copyright 2001
   3  * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  * partly derived from
   7  * linux/drivers/scsi/sym53c8xx.c
   8  *
   9  */
  10
  11 /*
  12  * SCSI support based on the chip sym53C810.
  13  *
  14  * 09-19-2001 Andreas Heppel, Sysgo RTS GmbH <aheppel@sysgo.de>
  15  *              The local version of this driver for the BAB750 board does not
  16  *              use interrupts but polls the chip instead (see the call of
  17  *              'handle_scsi_int()' in 'scsi_issue()'.
  18  */
  19
  20 #include <common.h>
  21
  22 #include <command.h>
  23 #include <pci.h>
  24 #include <asm/processor.h>
  25 #include <sym53c8xx.h>
  26 #include <scsi.h>
  27
  28 #undef  SYM53C8XX_DEBUG
  29
  30 #ifdef  SYM53C8XX_DEBUG
  31 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  32 #else
  33 #define PRINTF(fmt,args...)
  34 #endif
  35
  36 #if defined(CONFIG_SCSI) && defined(CONFIG_SCSI_SYM53C8XX)
  37
  38 #undef SCSI_SINGLE_STEP
  39 /*
  40  * Single Step is only used for debug purposes
  41  */
  42 #ifdef SCSI_SINGLE_STEP
  43 static unsigned long start_script_select;
  44 static unsigned long start_script_msgout;
  45 static unsigned long start_script_msgin;
  46 static unsigned long start_script_msg_ext;
  47 static unsigned long start_script_cmd;
  48 static unsigned long start_script_data_in;
  49 static unsigned long start_script_data_out;
  50 static unsigned long start_script_status;
  51 static unsigned long start_script_complete;
  52 static unsigned long start_script_error;
  53 static unsigned long start_script_reselection;
  54 static unsigned int len_script_select;
  55 static unsigned int len_script_msgout;
  56 static unsigned int len_script_msgin;
  57 static unsigned int len_script_msg_ext;
  58 static unsigned int len_script_cmd;
  59 static unsigned int len_script_data_in;
  60 static unsigned int len_script_data_out;
  61 static unsigned int len_script_status;
  62 static unsigned int len_script_complete;
  63 static unsigned int len_script_error;
  64 static unsigned int len_script_reselection;
  65 #endif
  66
  67
  68 static unsigned short scsi_int_mask;    /* shadow register for SCSI related interrupts */
  69 static unsigned char  script_int_mask;  /* shadow register for SCRIPT related interrupts */
  70 static unsigned long script_select[8];  /* script for selection */
  71 static unsigned long script_msgout[8];  /* script for message out phase (NOT USED) */
  72 static unsigned long script_msgin[14];  /* script for message in phase */
  73 static unsigned long script_msg_ext[32]; /* script for message in phase when more than 1 byte message */
  74 static unsigned long script_cmd[18];    /* script for command phase */
  75 static unsigned long script_data_in[8]; /* script for data in phase */
  76 static unsigned long script_data_out[8]; /* script for data out phase */
  77 static unsigned long script_status[6]; /* script for status phase */
  78 static unsigned long script_complete[10]; /* script for complete */
  79 static unsigned long script_reselection[4]; /* script for reselection (NOT USED) */
  80 static unsigned long script_error[2]; /* script for error handling */
  81
  82 static unsigned long int_stat[3]; /* interrupt status */
  83 static unsigned long scsi_mem_addr; /* base memory address =SCSI_MEM_ADDRESS; */
  84
  85 #define bus_to_phys(a)  pci_mem_to_phys(busdevfunc, (unsigned long) (a))
  86 #define phys_to_bus(a)  pci_phys_to_mem(busdevfunc, (unsigned long) (a))
  87
  88 #define SCSI_MAX_RETRY 3 /* number of retries in scsi_issue() */
  89
  90 #define SCSI_MAX_RETRY_NOT_READY 10 /* number of retries when device is not ready */
  91 #define SCSI_NOT_READY_TIME_OUT 500 /* timeout per retry when not ready */
  92
  93 /*********************************************************************************
  94  * forward declerations
  95  */
  96
  97 void scsi_chip_init(void);
  98 void handle_scsi_int(void);
  99
 100
 101 /********************************************************************************
 102  * reports SCSI errors to the user
 103  */
 104 void scsi_print_error (ccb * pccb)
 105 {
 106         int i;
 107
 108         printf ("SCSI Error: Target %d LUN %d Command %02X\n", pccb->target,
 109                 pccb->lun, pccb->cmd[0]);
 110         printf ("       CCB: ");
 111         for (i = 0; i < pccb->cmdlen; i++)
 112                 printf ("%02X ", pccb->cmd[i]);
 113         printf ("(len=%d)\n", pccb->cmdlen);
 114         printf ("     Cntrl: ");
 115         switch (pccb->contr_stat) {
 116         case SIR_COMPLETE:
 117                 printf ("Complete (no Error)\n");
 118                 break;
 119         case SIR_SEL_ATN_NO_MSG_OUT:
 120                 printf ("Selected with ATN no MSG out phase\n");
 121                 break;
 122         case SIR_CMD_OUT_ILL_PH:
 123                 printf ("Command out illegal phase\n");
 124                 break;
 125         case SIR_MSG_RECEIVED:
 126                 printf ("MSG received Error\n");
 127                 break;
 128         case SIR_DATA_IN_ERR:
 129                 printf ("Data in Error\n");
 130                 break;
 131         case SIR_DATA_OUT_ERR:
 132                 printf ("Data out Error\n");
 133                 break;
 134         case SIR_SCRIPT_ERROR:
 135                 printf ("Script Error\n");
 136                 break;
 137         case SIR_MSG_OUT_NO_CMD:
 138                 printf ("MSG out no Command phase\n");
 139                 break;
 140         case SIR_MSG_OVER7:
 141                 printf ("MSG in over 7 bytes\n");
 142                 break;
 143         case INT_ON_FY:
 144                 printf ("Interrupt on fly\n");
 145                 break;
 146         case SCSI_SEL_TIME_OUT:
 147                 printf ("SCSI Selection Timeout\n");
 148                 break;
 149         case SCSI_HNS_TIME_OUT:
 150                 printf ("SCSI Handshake Timeout\n");
 151                 break;
 152         case SCSI_MA_TIME_OUT:
 153                 printf ("SCSI Phase Error\n");
 154                 break;
 155         case SCSI_UNEXP_DIS:
 156                 printf ("SCSI unexpected disconnect\n");
 157                 break;
 158         default:
 159                 printf ("unknown status %lx\n", pccb->contr_stat);
 160                 break;
 161         }
 162         printf ("     Sense: SK %x (", pccb->sense_buf[2] & 0x0f);
 163         switch (pccb->sense_buf[2] & 0xf) {
 164         case SENSE_NO_SENSE:
 165                 printf ("No Sense)");
 166                 break;
 167         case SENSE_RECOVERED_ERROR:
 168                 printf ("Recovered Error)");
 169                 break;
 170         case SENSE_NOT_READY:
 171                 printf ("Not Ready)");
 172                 break;
 173         case SENSE_MEDIUM_ERROR:
 174                 printf ("Medium Error)");
 175                 break;
 176         case SENSE_HARDWARE_ERROR:
 177                 printf ("Hardware Error)");
 178                 break;
 179         case SENSE_ILLEGAL_REQUEST:
 180                 printf ("Illegal request)");
 181                 break;
 182         case SENSE_UNIT_ATTENTION:
 183                 printf ("Unit Attention)");
 184                 break;
 185         case SENSE_DATA_PROTECT:
 186                 printf ("Data Protect)");
 187                 break;
 188         case SENSE_BLANK_CHECK:
 189                 printf ("Blank check)");
 190                 break;
 191         case SENSE_VENDOR_SPECIFIC:
 192                 printf ("Vendor specific)");
 193                 break;
 194         case SENSE_COPY_ABORTED:
 195                 printf ("Copy aborted)");
 196                 break;
 197         case SENSE_ABORTED_COMMAND:
 198                 printf ("Aborted Command)");
 199                 break;
 200         case SENSE_VOLUME_OVERFLOW:
 201                 printf ("Volume overflow)");
 202                 break;
 203         case SENSE_MISCOMPARE:
 204                 printf ("Misscompare\n");
 205                 break;
 206         default:
 207                 printf ("Illegal Sensecode\n");
 208                 break;
 209         }
 210         printf (" ASC %x ASCQ %x\n", pccb->sense_buf[12],
 211                 pccb->sense_buf[13]);
 212         printf ("    Status: ");
 213         switch (pccb->status) {
 214         case S_GOOD:
 215                 printf ("Good\n");
 216                 break;
 217         case S_CHECK_COND:
 218                 printf ("Check condition\n");
 219                 break;
 220         case S_COND_MET:
 221                 printf ("Condition Met\n");
 222                 break;
 223         case S_BUSY:
 224                 printf ("Busy\n");
 225                 break;
 226         case S_INT:
 227                 printf ("Intermediate\n");
 228                 break;
 229         case S_INT_COND_MET:
 230                 printf ("Intermediate condition met\n");
 231                 break;
 232         case S_CONFLICT:
 233                 printf ("Reservation conflict\n");
 234                 break;
 235         case S_TERMINATED:
 236                 printf ("Command terminated\n");
 237                 break;
 238         case S_QUEUE_FULL:
 239                 printf ("Task set full\n");
 240                 break;
 241         default:
 242                 printf ("unknown: %02X\n", pccb->status);
 243                 break;
 244         }
 245
 246 }
 247
 248
 249 /******************************************************************************
 250  * sets-up the SCSI controller
 251  * the base memory address is retrieved via the pci_read_config_dword
 252  */
 253 void scsi_low_level_init(int busdevfunc)
 254 {
 255         unsigned int cmd;
 256         unsigned int addr;
 257         unsigned char vec;
 258
 259         pci_read_config_byte(busdevfunc, PCI_INTERRUPT_LINE, &vec);
 260         pci_read_config_dword(busdevfunc, PCI_BASE_ADDRESS_1, &addr);
 261
 262         addr = bus_to_phys(addr & ~0xf);
 263
 264         /*
 265          * Enable bus mastering in case this has not been done, yet.
 266          */
 267         pci_read_config_dword(busdevfunc, PCI_COMMAND, &cmd);
 268         cmd |= PCI_COMMAND_MASTER;
 269         pci_write_config_dword(busdevfunc, PCI_COMMAND, cmd);
 270
 271         scsi_mem_addr = addr;
 272
 273         scsi_chip_init();
 274         scsi_bus_reset();
 275 }
 276
 277
 278 /************************************************************************************
 279  * Low level Part of SCSI Driver
 280  */
 281
 282 /*
 283  * big-endian -> little endian conversion for the script
 284  */
 285 unsigned long swap_script(unsigned long val)
 286 {
 287         return ((val >> 24) & 0xff) | ((val >> 8) & 0xff00) |
 288                 ((val << 8) & 0xff0000) | ((val << 24) & 0xff000000);
 289 }
 290
 291
 292 void scsi_write_byte(ulong offset,unsigned char val)
 293 {
 294         out8(scsi_mem_addr+offset,val);
 295 }
 296
 297
 298 unsigned char scsi_read_byte(ulong offset)
 299 {
 300         return(in8(scsi_mem_addr+offset));
 301 }
 302
 303
 304 /********************************************************************************
 305  * interrupt handler
 306  */
 307 void handle_scsi_int(void)
 308 {
 309         unsigned char stat,stat1,stat2;
 310         unsigned short sstat;
 311         int i;
 312 #ifdef SCSI_SINGLE_STEP
 313         unsigned long tt;
 314 #endif
 315         stat=scsi_read_byte(ISTAT);
 316         if((stat & DIP)==DIP) { /* DMA Interrupt pending */
 317                 stat1=scsi_read_byte(DSTAT);
 318 #ifdef SCSI_SINGLE_STEP
 319                 if((stat1 & SSI)==SSI) {
 320                         tt=in32r(scsi_mem_addr+DSP);
 321                         if(((tt)>=start_script_select) && ((tt)<start_script_select+len_script_select)) {
 322                                 printf("select %d\n",(tt-start_script_select)>>2);
 323                                 goto end_single;
 324                         }
 325                         if(((tt)>=start_script_msgout) && ((tt)<start_script_msgout+len_script_msgout)) {
 326                                 printf("msgout %d\n",(tt-start_script_msgout)>>2);
 327                                 goto end_single;
 328                         }
 329                         if(((tt)>=start_script_msgin) && ((tt)<start_script_msgin+len_script_msgin)) {
 330                                 printf("msgin %d\n",(tt-start_script_msgin)>>2);
 331                                 goto end_single;
 332                         }
 333                         if(((tt)>=start_script_msg_ext) && ((tt)<start_script_msg_ext+len_script_msg_ext)) {
 334                                 printf("msgin_ext %d\n",(tt-start_script_msg_ext)>>2);
 335                                 goto end_single;
 336                         }
 337                         if(((tt)>=start_script_cmd) && ((tt)<start_script_cmd+len_script_cmd)) {
 338                                 printf("cmd %d\n",(tt-start_script_cmd)>>2);
 339                                 goto end_single;
 340                         }
 341                         if(((tt)>=start_script_data_in) && ((tt)<start_script_data_in+len_script_data_in)) {
 342                                 printf("data_in %d\n",(tt-start_script_data_in)>>2);
 343                                 goto end_single;
 344                         }
 345                         if(((tt)>=start_script_data_out) && ((tt)<start_script_data_out+len_script_data_out)) {
 346                                 printf("data_out %d\n",(tt-start_script_data_out)>>2);
 347                                 goto end_single;
 348                         }
 349                         if(((tt)>=start_script_status) && ((tt)<start_script_status+len_script_status)) {
 350                                 printf("status %d\n",(tt-start_script_status)>>2);
 351                                 goto end_single;
 352                         }
 353                         if(((tt)>=start_script_complete) && ((tt)<start_script_complete+len_script_complete)) {
 354                                 printf("complete %d\n",(tt-start_script_complete)>>2);
 355                                 goto end_single;
 356                         }
 357                         if(((tt)>=start_script_error) && ((tt)<start_script_error+len_script_error)) {
 358                                 printf("error %d\n",(tt-start_script_error)>>2);
 359                                 goto end_single;
 360                         }
 361                         if(((tt)>=start_script_reselection) && ((tt)<start_script_reselection+len_script_reselection)) {
 362                                 printf("reselection %d\n",(tt-start_script_reselection)>>2);
 363                                 goto end_single;
 364                         }
 365                         printf("sc: %lx\n",tt);
 366 end_single:
 367                         stat2=scsi_read_byte(DCNTL);
 368                         stat2|=STD;
 369                         scsi_write_byte(DCNTL,stat2);
 370                 }
 371 #endif
 372                 if((stat1 & SIR)==SIR) /* script interrupt */
 373                 {
 374                         int_stat[0]=in32(scsi_mem_addr+DSPS);
 375                 }
 376                 if((stat1 & DFE)==0) { /* fifo not epmty */
 377                         scsi_write_byte(CTEST3,CLF); /* Clear DMA FIFO */
 378                         stat2=scsi_read_byte(STEST3);
 379                         scsi_write_byte(STEST3,(stat2 | CSF)); /* Clear SCSI FIFO */
 380                 }
 381         }
 382         if((stat & SIP)==SIP) {  /* scsi interrupt */
 383                 sstat = (unsigned short)scsi_read_byte(SIST+1);
 384                 sstat <<=8;
 385                 sstat |= (unsigned short)scsi_read_byte(SIST);
 386                 for(i=0;i<3;i++) {
 387                         if(int_stat[i]==0)
 388                                 break; /* found an empty int status */
 389                 }
 390                 int_stat[i]=SCSI_INT_STATE | sstat;
 391                 stat1=scsi_read_byte(DSTAT);
 392                 if((stat1 & DFE)==0) { /* fifo not epmty */
 393                         scsi_write_byte(CTEST3,CLF); /* Clear DMA FIFO */
 394                         stat2=scsi_read_byte(STEST3);
 395                         scsi_write_byte(STEST3,(stat2 | CSF)); /* Clear SCSI FIFO */
 396                 }
 397         }
 398         if((stat & INTF)==INTF) { /* interrupt on Fly */
 399                 scsi_write_byte(ISTAT,stat); /* clear it */
 400                 for(i=0;i<3;i++) {
 401                         if(int_stat[i]==0)
 402                                 break; /* found an empty int status */
 403                 }
 404                 int_stat[i]=INT_ON_FY;
 405         }
 406 }
 407
 408 void scsi_bus_reset(void)
 409 {
 410         unsigned char t;
 411         int i;
 412         int end = CONFIG_SYS_SCSI_SPIN_UP_TIME*1000;
 413
 414         t=scsi_read_byte(SCNTL1);
 415         scsi_write_byte(SCNTL1,(t | CRST));
 416         udelay(50);
 417         scsi_write_byte(SCNTL1,t);
 418
 419         puts("waiting for devices to spin up");
 420         for(i=0;i<end;i++) {
 421                 udelay(1000); /* give the devices time to spin up */
 422                 if (i % 1000 == 0)
 423                         putc('.');
 424         }
 425         putc('\n');
 426         scsi_chip_init(); /* reinit the chip ...*/
 427
 428 }
 429
 430 void scsi_int_enable(void)
 431 {
 432         scsi_write_byte(SIEN,(unsigned char)scsi_int_mask);
 433         scsi_write_byte(SIEN+1,(unsigned char)(scsi_int_mask>>8));
 434         scsi_write_byte(DIEN,script_int_mask);
 435 }
 436
 437 void scsi_write_dsp(unsigned long start)
 438 {
 439 #ifdef SCSI_SINGLE_STEP
 440         unsigned char t;
 441 #endif
 442         out32r(scsi_mem_addr + DSP,start);
 443 #ifdef SCSI_SINGLE_STEP
 444         t=scsi_read_byte(DCNTL);
 445   t|=STD;
 446         scsi_write_byte(DCNTL,t);
 447 #endif
 448 }
 449
 450 /* only used for debug purposes */
 451 void scsi_print_script(void)
 452 {
 453         printf("script_select @         0x%08lX\n",(unsigned long)&script_select[0]);
 454         printf("script_msgout @         0x%08lX\n",(unsigned long)&script_msgout[0]);
 455         printf("script_msgin @          0x%08lX\n",(unsigned long)&script_msgin[0]);
 456         printf("script_msgext @         0x%08lX\n",(unsigned long)&script_msg_ext[0]);
 457         printf("script_cmd @            0x%08lX\n",(unsigned long)&script_cmd[0]);
 458         printf("script_data_in @        0x%08lX\n",(unsigned long)&script_data_in[0]);
 459         printf("script_data_out @       0x%08lX\n",(unsigned long)&script_data_out[0]);
 460         printf("script_status @         0x%08lX\n",(unsigned long)&script_status[0]);
 461         printf("script_complete @       0x%08lX\n",(unsigned long)&script_complete[0]);
 462         printf("script_error @          0x%08lX\n",(unsigned long)&script_error[0]);
 463 }
 464
 465
 466 void scsi_set_script(ccb *pccb)
 467 {
 468         int busdevfunc = pccb->priv;
 469         int i;
 470         i=0;
 471         script_select[i++]=swap_script(SCR_REG_REG(GPREG, SCR_AND, 0xfe));
 472         script_select[i++]=0; /* LED ON */
 473         script_select[i++]=swap_script(SCR_CLR(SCR_TRG)); /* select initiator mode */
 474         script_select[i++]=0;
 475         /* script_select[i++]=swap_script(SCR_SEL_ABS_ATN | pccb->target << 16); */
 476         script_select[i++]=swap_script(SCR_SEL_ABS | pccb->target << 16);
 477         script_select[i++]=swap_script(phys_to_bus(&script_cmd[4])); /* error handling */
 478         script_select[i++]=swap_script(SCR_JUMP); /* next section */
 479         /*      script_select[i++]=swap_script((unsigned long)&script_msgout[0]); */ /* message out */
 480         script_select[i++]=swap_script(phys_to_bus(&script_cmd[0])); /* command out */
 481
 482 #ifdef SCSI_SINGLE_STEP
 483         start_script_select=(unsigned long)&script_select[0];
 484         len_script_select=i*4;
 485 #endif
 486
 487         i=0;
 488         script_msgout[i++]=swap_script(SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)));
 489         script_msgout[i++]=SIR_SEL_ATN_NO_MSG_OUT;
 490         script_msgout[i++]=swap_script( SCR_MOVE_ABS(1) ^ SCR_MSG_OUT);
 491         script_msgout[i++]=swap_script(phys_to_bus(&pccb->msgout[0]));
 492         script_msgout[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_COMMAND))); /* if Command phase */
 493         script_msgout[i++]=swap_script(phys_to_bus(&script_cmd[0])); /* switch to command */
 494         script_msgout[i++]=swap_script(SCR_INT); /* interrupt if not */
 495         script_msgout[i++]=SIR_MSG_OUT_NO_CMD;
 496
 497 #ifdef SCSI_SINGLE_STEP
 498         start_script_msgout=(unsigned long)&script_msgout[0];
 499         len_script_msgout=i*4;
 500 #endif
 501         i=0;
 502         script_cmd[i++]=swap_script(SCR_MOVE_ABS(pccb->cmdlen) ^ SCR_COMMAND);
 503         script_cmd[i++]=swap_script(phys_to_bus(&pccb->cmd[0]));
 504         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN))); /* message in ? */
 505         script_cmd[i++]=swap_script(phys_to_bus(&script_msgin[0]));
 506         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_DATA_OUT))); /* data out ? */
 507         script_cmd[i++]=swap_script(phys_to_bus(&script_data_out[0]));
 508         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_DATA_IN))); /* data in ? */
 509         script_cmd[i++]=swap_script(phys_to_bus(&script_data_in[0]));
 510         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_STATUS)));  /* status ? */
 511         script_cmd[i++]=swap_script(phys_to_bus(&script_status[0]));
 512         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND)));  /* command ? */
 513         script_cmd[i++]=swap_script(phys_to_bus(&script_cmd[0]));
 514         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT)));  /* message out ? */
 515         script_cmd[i++]=swap_script(phys_to_bus(&script_msgout[0]));
 516         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_MSG_IN))); /* just for error handling message in ? */
 517         script_cmd[i++]=swap_script(phys_to_bus(&script_msgin[0]));
 518         script_cmd[i++]=swap_script(SCR_INT); /* interrupt if not */
 519         script_cmd[i++]=SIR_CMD_OUT_ILL_PH;
 520 #ifdef SCSI_SINGLE_STEP
 521         start_script_cmd=(unsigned long)&script_cmd[0];
 522         len_script_cmd=i*4;
 523 #endif
 524         i=0;
 525         script_data_out[i++]=swap_script(SCR_MOVE_ABS(pccb->datalen)^ SCR_DATA_OUT); /* move */
 526         script_data_out[i++]=swap_script(phys_to_bus(pccb->pdata)); /* pointer to buffer */
 527         script_data_out[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_STATUS)));
 528         script_data_out[i++]=swap_script(phys_to_bus(&script_status[0]));
 529         script_data_out[i++]=swap_script(SCR_INT);
 530         script_data_out[i++]=SIR_DATA_OUT_ERR;
 531
 532 #ifdef SCSI_SINGLE_STEP
 533         start_script_data_out=(unsigned long)&script_data_out[0];
 534         len_script_data_out=i*4;
 535 #endif
 536         i=0;
 537         script_data_in[i++]=swap_script(SCR_MOVE_ABS(pccb->datalen)^ SCR_DATA_IN); /* move  */
 538         script_data_in[i++]=swap_script(phys_to_bus(pccb->pdata)); /* pointer to buffer */
 539         script_data_in[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_STATUS)));
 540         script_data_in[i++]=swap_script(phys_to_bus(&script_status[0]));
 541         script_data_in[i++]=swap_script(SCR_INT);
 542         script_data_in[i++]=SIR_DATA_IN_ERR;
 543 #ifdef SCSI_SINGLE_STEP
 544         start_script_data_in=(unsigned long)&script_data_in[0];
 545         len_script_data_in=i*4;
 546 #endif
 547         i=0;
 548         script_msgin[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN);
 549         script_msgin[i++]=swap_script(phys_to_bus(&pccb->msgin[0]));
 550         script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_COMPLETE)));
 551         script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
 552         script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_DISCONNECT)));
 553         script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
 554         script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_SAVE_DP)));
 555         script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
 556         script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_RESTORE_DP)));
 557         script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
 558         script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)));
 559         script_msgin[i++]=swap_script(phys_to_bus(&script_msg_ext[0]));
 560         script_msgin[i++]=swap_script(SCR_INT);
 561         script_msgin[i++]=SIR_MSG_RECEIVED;
 562 #ifdef SCSI_SINGLE_STEP
 563         start_script_msgin=(unsigned long)&script_msgin[0];
 564         len_script_msgin=i*4;
 565 #endif
 566         i=0;
 567         script_msg_ext[i++]=swap_script(SCR_CLR (SCR_ACK)); /* clear ACK */
 568         script_msg_ext[i++]=0;
 569         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* assuming this is the msg length */
 570         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[1]));
 571         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 572         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 573         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
 574         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[2]));
 575         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 576         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 577         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
 578         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[3]));
 579         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 580         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 581         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
 582         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[4]));
 583         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 584         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 585         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
 586         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[5]));
 587         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 588         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 589         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
 590         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[6]));
 591         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 592         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 593         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
 594         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[7]));
 595         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 596         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 597         script_msg_ext[i++]=swap_script(SCR_INT);
 598         script_msg_ext[i++]=SIR_MSG_OVER7;
 599 #ifdef SCSI_SINGLE_STEP
 600         start_script_msg_ext=(unsigned long)&script_msg_ext[0];
 601         len_script_msg_ext=i*4;
 602 #endif
 603         i=0;
 604         script_status[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_STATUS);
 605         script_status[i++]=swap_script(phys_to_bus(&pccb->status));
 606         script_status[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)));
 607         script_status[i++]=swap_script(phys_to_bus(&script_msgin[0]));
 608         script_status[i++]=swap_script(SCR_INT);
 609         script_status[i++]=SIR_STATUS_ILL_PH;
 610 #ifdef SCSI_SINGLE_STEP
 611         start_script_status=(unsigned long)&script_status[0];
 612         len_script_status=i*4;
 613 #endif
 614         i=0;
 615         script_complete[i++]=swap_script(SCR_REG_REG (SCNTL2, SCR_AND, 0x7f));
 616         script_complete[i++]=0;
 617         script_complete[i++]=swap_script(SCR_CLR (SCR_ACK|SCR_ATN));
 618         script_complete[i++]=0;
 619         script_complete[i++]=swap_script(SCR_WAIT_DISC);
 620         script_complete[i++]=0;
 621         script_complete[i++]=swap_script(SCR_REG_REG(GPREG, SCR_OR, 0x01));
 622         script_complete[i++]=0; /* LED OFF */
 623         script_complete[i++]=swap_script(SCR_INT);
 624         script_complete[i++]=SIR_COMPLETE;
 625 #ifdef SCSI_SINGLE_STEP
 626         start_script_complete=(unsigned long)&script_complete[0];
 627         len_script_complete=i*4;
 628 #endif
 629         i=0;
 630         script_error[i++]=swap_script(SCR_INT); /* interrupt if error */
 631         script_error[i++]=SIR_SCRIPT_ERROR;
 632 #ifdef SCSI_SINGLE_STEP
 633         start_script_error=(unsigned long)&script_error[0];
 634         len_script_error=i*4;
 635 #endif
 636         i=0;
 637         script_reselection[i++]=swap_script(SCR_CLR (SCR_TRG)); /* target status */
 638         script_reselection[i++]=0;
 639         script_reselection[i++]=swap_script(SCR_WAIT_RESEL);
 640         script_reselection[i++]=swap_script(phys_to_bus(&script_select[0])); /* len = 4 */
 641 #ifdef SCSI_SINGLE_STEP
 642         start_script_reselection=(unsigned long)&script_reselection[0];
 643         len_script_reselection=i*4;
 644 #endif
 645 }
 646
 647
 648 void scsi_issue(ccb *pccb)
 649 {
 650         int busdevfunc = pccb->priv;
 651         int i;
 652         unsigned short sstat;
 653         int retrycnt;  /* retry counter */
 654         for(i=0;i<3;i++)
 655                 int_stat[i]=0; /* delete all int status */
 656         /* struct pccb must be set-up correctly */
 657         retrycnt=0;
 658         PRINTF("ID %d issue cmd %02X\n",pccb->target,pccb->cmd[0]);
 659         pccb->trans_bytes=0; /* no bytes transferred yet */
 660         scsi_set_script(pccb); /* fill in SCRIPT                */
 661         scsi_int_mask=STO | UDC | MA; /* | CMP; / * Interrupts which are enabled */
 662         script_int_mask=0xff; /* enable all Ints */
 663         scsi_int_enable();
 664         scsi_write_dsp(phys_to_bus(&script_select[0])); /* start script */
 665         /* now we have to wait for IRQs */
 666 retry:
 667         /*
 668          * This version of the driver is _not_ interrupt driven,
 669          * but polls the chip's interrupt registers (ISTAT, DSTAT).
 670          */
 671         while(int_stat[0]==0)
 672                 handle_scsi_int();
 673
 674         if(int_stat[0]==SIR_COMPLETE) {
 675                 if(pccb->msgin[0]==M_DISCONNECT) {
 676                         PRINTF("Wait for reselection\n");
 677                         for(i=0;i<3;i++)
 678                                 int_stat[i]=0; /* delete all int status */
 679                         scsi_write_dsp(phys_to_bus(&script_reselection[0])); /* start reselection script */
 680                         goto retry;
 681                 }
 682                 pccb->contr_stat=SIR_COMPLETE;
 683                 return;
 684         }
 685         if((int_stat[0] & SCSI_INT_STATE)==SCSI_INT_STATE) { /* scsi interrupt */
 686                 sstat=(unsigned short)int_stat[0];
 687                 if((sstat & STO)==STO) { /* selection timeout */
 688                         pccb->contr_stat=SCSI_SEL_TIME_OUT;
 689                         scsi_write_byte(GPREG,0x01);
 690                         PRINTF("ID: %X Selection Timeout\n",pccb->target);
 691                         return;
 692                 }
 693                 if((sstat & UDC)==UDC) { /* unexpected disconnect */
 694                         pccb->contr_stat=SCSI_UNEXP_DIS;
 695                         scsi_write_byte(GPREG,0x01);
 696                         PRINTF("ID: %X Unexpected Disconnect\n",pccb->target);
 697                         return;
 698                 }
 699                 if((sstat & RSL)==RSL) { /* reselection */
 700                         pccb->contr_stat=SCSI_UNEXP_DIS;
 701                         scsi_write_byte(GPREG,0x01);
 702                         PRINTF("ID: %X Unexpected Disconnect\n",pccb->target);
 703                         return;
 704                 }
 705                 if(((sstat & MA)==MA)||((sstat & HTH)==HTH)) { /* phase missmatch */
 706                         if(retrycnt<SCSI_MAX_RETRY) {
 707                                 pccb->trans_bytes=pccb->datalen -
 708                                         ((unsigned long)scsi_read_byte(DBC) |
 709                                         ((unsigned long)scsi_read_byte(DBC+1)<<8) |
 710                                         ((unsigned long)scsi_read_byte(DBC+2)<<16));
 711                                 for(i=0;i<3;i++)
 712                                         int_stat[i]=0; /* delete all int status */
 713                                 retrycnt++;
 714                                 PRINTF("ID: %X Phase Missmatch Retry %d Phase %02X transferred %lx\n",
 715                                                 pccb->target,retrycnt,scsi_read_byte(SBCL),pccb->trans_bytes);
 716                                 scsi_write_dsp(phys_to_bus(&script_cmd[4])); /* start retry script */
 717                                 goto retry;
 718                         }
 719                         if((sstat & MA)==MA)
 720                                 pccb->contr_stat=SCSI_MA_TIME_OUT;
 721                         else
 722                                 pccb->contr_stat=SCSI_HNS_TIME_OUT;
 723                         PRINTF("Phase Missmatch stat %lx\n",pccb->contr_stat);
 724                         return;
 725                 } /* no phase int */
 726 /*              if((sstat & CMP)==CMP) {
 727                         pccb->contr_stat=SIR_COMPLETE;
 728                         return;
 729                 }
 730 */
 731                 PRINTF("SCSI INT %lX\n",int_stat[0]);
 732                 pccb->contr_stat=int_stat[0];
 733                 return;
 734         } /* end scsi int */
 735         PRINTF("SCRIPT INT %lX phase %02X\n",int_stat[0],scsi_read_byte(SBCL));
 736         pccb->contr_stat=int_stat[0];
 737         return;
 738 }
 739
 740 int scsi_exec(ccb *pccb)
 741 {
 742         unsigned char tmpcmd[16],tmpstat;
 743         int i,retrycnt,t;
 744         unsigned long transbytes,datalen;
 745         unsigned char *tmpptr;
 746         retrycnt=0;
 747 retry:
 748         scsi_issue(pccb);
 749         if(pccb->contr_stat!=SIR_COMPLETE)
 750                 return false;
 751         if(pccb->status==S_GOOD)
 752                 return true;
 753         if(pccb->status==S_CHECK_COND) { /* check condition */
 754                 for(i=0;i<16;i++)
 755                         tmpcmd[i]=pccb->cmd[i];
 756                 pccb->cmd[0]=SCSI_REQ_SENSE;
 757                 pccb->cmd[1]=pccb->lun<<5;
 758                 pccb->cmd[2]=0;
 759                 pccb->cmd[3]=0;
 760                 pccb->cmd[4]=14;
 761                 pccb->cmd[5]=0;
 762                 pccb->cmdlen=6;
 763                 pccb->msgout[0]=SCSI_IDENTIFY;
 764                 transbytes=pccb->trans_bytes;
 765                 tmpptr=pccb->pdata;
 766                 pccb->pdata = &pccb->sense_buf[0];
 767                 datalen=pccb->datalen;
 768                 pccb->datalen=14;
 769                 tmpstat=pccb->status;
 770                 scsi_issue(pccb);
 771                 for(i=0;i<16;i++)
 772                         pccb->cmd[i]=tmpcmd[i];
 773                 pccb->trans_bytes=transbytes;
 774                 pccb->pdata=tmpptr;
 775                 pccb->datalen=datalen;
 776                 pccb->status=tmpstat;
 777                 PRINTF("Request_sense sense key %x ASC %x ASCQ %x\n",pccb->sense_buf[2]&0x0f,
 778                         pccb->sense_buf[12],pccb->sense_buf[13]);
 779                 switch(pccb->sense_buf[2]&0xf) {
 780                         case SENSE_NO_SENSE:
 781                         case SENSE_RECOVERED_ERROR:
 782                                 /* seems to be ok */
 783                                 return true;
 784                                 break;
 785                         case SENSE_NOT_READY:
 786                                 if((pccb->sense_buf[12]!=0x04)||(pccb->sense_buf[13]!=0x01)) {
 787                                         /* if device is not in process of becoming ready */
 788                                         return false;
 789                                         break;
 790                                 } /* else fall through */
 791                         case SENSE_UNIT_ATTENTION:
 792                                 if(retrycnt<SCSI_MAX_RETRY_NOT_READY) {
 793                                         PRINTF("Target %d not ready, retry %d\n",pccb->target,retrycnt);
 794                                         for(t=0;t<SCSI_NOT_READY_TIME_OUT;t++)
 795                                                 udelay(1000); /* 1sec wait */
 796                                         retrycnt++;
 797                                         goto retry;
 798                                 }
 799                                 PRINTF("Target %d not ready, %d retried\n",pccb->target,retrycnt);
 800                                 return false;
 801                         default:
 802                                 return false;
 803                 }
 804         }
 805         PRINTF("Status = %X\n",pccb->status);
 806         return false;
 807 }
 808
 809
 810 void scsi_chip_init(void)
 811 {
 812         /* first we issue a soft reset */
 813         scsi_write_byte(ISTAT,SRST);
 814         udelay(1000);
 815         scsi_write_byte(ISTAT,0);
 816         /* setup chip */
 817         scsi_write_byte(SCNTL0,0xC0); /* full arbitration no start, no message, parity disabled, master */
 818         scsi_write_byte(SCNTL1,0x00);
 819         scsi_write_byte(SCNTL2,0x00);
 820 #ifndef CONFIG_SYS_SCSI_SYM53C8XX_CCF    /* config value for none 40 MHz clocks */
 821         scsi_write_byte(SCNTL3,0x13); /* synchronous clock 40/4=10MHz, asynchronous 40MHz */
 822 #else
 823         scsi_write_byte(SCNTL3,CONFIG_SYS_SCSI_SYM53C8XX_CCF); /* config value for none 40 MHz clocks */
 824 #endif
 825         scsi_write_byte(SCID,0x47); /* ID=7, enable reselection */
 826         scsi_write_byte(SXFER,0x00); /* synchronous transfer period 10MHz, asynchronous */
 827         scsi_write_byte(SDID,0x00);  /* targed SCSI ID = 0 */
 828         scsi_int_mask=0x0000; /* no Interrupt is enabled */
 829         script_int_mask=0x00;
 830         scsi_int_enable();
 831         scsi_write_byte(GPREG,0x01); /* GPIO0 is LED (off) */
 832         scsi_write_byte(GPCNTL,0x0E); /* GPIO0 is Output */
 833         scsi_write_byte(STIME0,0x08); /* handshake timer disabled, selection timeout 512msec */
 834         scsi_write_byte(RESPID,0x80); /* repond only to the own ID (reselection) */
 835         scsi_write_byte(STEST1,0x00); /* not isolated, SCLK is used */
 836         scsi_write_byte(STEST2,0x00); /* no Lowlevel Mode? */
 837         scsi_write_byte(STEST3,0x80); /* enable tolerANT */
 838         scsi_write_byte(CTEST3,0x04); /* clear FIFO */
 839         scsi_write_byte(CTEST4,0x00);
 840         scsi_write_byte(CTEST5,0x00);
 841 #ifdef SCSI_SINGLE_STEP
 842 /*      scsi_write_byte(DCNTL,IRQM | SSM);      */
 843         scsi_write_byte(DCNTL,IRQD | SSM);
 844         scsi_write_byte(DMODE,MAN);
 845 #else
 846 /*      scsi_write_byte(DCNTL,IRQM);    */
 847         scsi_write_byte(DCNTL,IRQD);
 848         scsi_write_byte(DMODE,0x00);
 849 #endif
 850 }
 851 #endif