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 #ifdef CONFIG_SCSI_SYM53C8XX
  39
  40 #include <command.h>
  41 #include <pci.h>
  42 #include <asm/processor.h>
  43 #include <sym53c8xx.h>
  44 #include <scsi.h>
  45
  46 #undef  SYM53C8XX_DEBUG
  47
  48 #ifdef  SYM53C8XX_DEBUG
  49 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  50 #else
  51 #define PRINTF(fmt,args...)
  52 #endif
  53
  54 #if defined(CONFIG_CMD_SCSI) && defined(CONFIG_SCSI_SYM53C8XX)
  55
  56 #undef SCSI_SINGLE_STEP
  57 /*
  58  * Single Step is only used for debug purposes
  59  */
  60 #ifdef SCSI_SINGLE_STEP
  61 static unsigned long start_script_select;
  62 static unsigned long start_script_msgout;
  63 static unsigned long start_script_msgin;
  64 static unsigned long start_script_msg_ext;
  65 static unsigned long start_script_cmd;
  66 static unsigned long start_script_data_in;
  67 static unsigned long start_script_data_out;
  68 static unsigned long start_script_status;
  69 static unsigned long start_script_complete;
  70 static unsigned long start_script_error;
  71 static unsigned long start_script_reselection;
  72 static unsigned int len_script_select;
  73 static unsigned int len_script_msgout;
  74 static unsigned int len_script_msgin;
  75 static unsigned int len_script_msg_ext;
  76 static unsigned int len_script_cmd;
  77 static unsigned int len_script_data_in;
  78 static unsigned int len_script_data_out;
  79 static unsigned int len_script_status;
  80 static unsigned int len_script_complete;
  81 static unsigned int len_script_error;
  82 static unsigned int len_script_reselection;
  83 #endif
  84
  85
  86 static unsigned short scsi_int_mask;    /* shadow register for SCSI related interrupts */
  87 static unsigned char  script_int_mask;  /* shadow register for SCRIPT related interrupts */
  88 static unsigned long script_select[8];  /* script for selection */
  89 static unsigned long script_msgout[8];  /* script for message out phase (NOT USED) */
  90 static unsigned long script_msgin[14];  /* script for message in phase */
  91 static unsigned long script_msg_ext[32]; /* script for message in phase when more than 1 byte message */
  92 static unsigned long script_cmd[18];    /* script for command phase */
  93 static unsigned long script_data_in[8]; /* script for data in phase */
  94 static unsigned long script_data_out[8]; /* script for data out phase */
  95 static unsigned long script_status[6]; /* script for status phase */
  96 static unsigned long script_complete[10]; /* script for complete */
  97 static unsigned long script_reselection[4]; /* script for reselection (NOT USED) */
  98 static unsigned long script_error[2]; /* script for error handling */
  99
 100 static unsigned long int_stat[3]; /* interrupt status */
 101 static unsigned long scsi_mem_addr; /* base memory address =SCSI_MEM_ADDRESS; */
 102
 103 #define bus_to_phys(a)  pci_mem_to_phys(busdevfunc, (unsigned long) (a))
 104 #define phys_to_bus(a)  pci_phys_to_mem(busdevfunc, (unsigned long) (a))
 105
 106 #define SCSI_MAX_RETRY 3 /* number of retries in scsi_issue() */
 107
 108 #define SCSI_MAX_RETRY_NOT_READY 10 /* number of retries when device is not ready */
 109 #define SCSI_NOT_READY_TIME_OUT 500 /* timeout per retry when not ready */
 110
 111 /*********************************************************************************
 112  * forward declerations
 113  */
 114
 115 void scsi_chip_init(void);
 116 void handle_scsi_int(void);
 117
 118
 119 /********************************************************************************
 120  * reports SCSI errors to the user
 121  */
 122 void scsi_print_error (ccb * pccb)
 123 {
 124         int i;
 125
 126         printf ("SCSI Error: Target %d LUN %d Command %02X\n", pccb->target,
 127                 pccb->lun, pccb->cmd[0]);
 128         printf ("       CCB: ");
 129         for (i = 0; i < pccb->cmdlen; i++)
 130                 printf ("%02X ", pccb->cmd[i]);
 131         printf ("(len=%d)\n", pccb->cmdlen);
 132         printf ("     Cntrl: ");
 133         switch (pccb->contr_stat) {
 134         case SIR_COMPLETE:
 135                 printf ("Complete (no Error)\n");
 136                 break;
 137         case SIR_SEL_ATN_NO_MSG_OUT:
 138                 printf ("Selected with ATN no MSG out phase\n");
 139                 break;
 140         case SIR_CMD_OUT_ILL_PH:
 141                 printf ("Command out illegal phase\n");
 142                 break;
 143         case SIR_MSG_RECEIVED:
 144                 printf ("MSG received Error\n");
 145                 break;
 146         case SIR_DATA_IN_ERR:
 147                 printf ("Data in Error\n");
 148                 break;
 149         case SIR_DATA_OUT_ERR:
 150                 printf ("Data out Error\n");
 151                 break;
 152         case SIR_SCRIPT_ERROR:
 153                 printf ("Script Error\n");
 154                 break;
 155         case SIR_MSG_OUT_NO_CMD:
 156                 printf ("MSG out no Command phase\n");
 157                 break;
 158         case SIR_MSG_OVER7:
 159                 printf ("MSG in over 7 bytes\n");
 160                 break;
 161         case INT_ON_FY:
 162                 printf ("Interrupt on fly\n");
 163                 break;
 164         case SCSI_SEL_TIME_OUT:
 165                 printf ("SCSI Selection Timeout\n");
 166                 break;
 167         case SCSI_HNS_TIME_OUT:
 168                 printf ("SCSI Handshake Timeout\n");
 169                 break;
 170         case SCSI_MA_TIME_OUT:
 171                 printf ("SCSI Phase Error\n");
 172                 break;
 173         case SCSI_UNEXP_DIS:
 174                 printf ("SCSI unexpected disconnect\n");
 175                 break;
 176         default:
 177                 printf ("unknown status %lx\n", pccb->contr_stat);
 178                 break;
 179         }
 180         printf ("     Sense: SK %x (", pccb->sense_buf[2] & 0x0f);
 181         switch (pccb->sense_buf[2] & 0xf) {
 182         case SENSE_NO_SENSE:
 183                 printf ("No Sense)");
 184                 break;
 185         case SENSE_RECOVERED_ERROR:
 186                 printf ("Recovered Error)");
 187                 break;
 188         case SENSE_NOT_READY:
 189                 printf ("Not Ready)");
 190                 break;
 191         case SENSE_MEDIUM_ERROR:
 192                 printf ("Medium Error)");
 193                 break;
 194         case SENSE_HARDWARE_ERROR:
 195                 printf ("Hardware Error)");
 196                 break;
 197         case SENSE_ILLEGAL_REQUEST:
 198                 printf ("Illegal request)");
 199                 break;
 200         case SENSE_UNIT_ATTENTION:
 201                 printf ("Unit Attention)");
 202                 break;
 203         case SENSE_DATA_PROTECT:
 204                 printf ("Data Protect)");
 205                 break;
 206         case SENSE_BLANK_CHECK:
 207                 printf ("Blank check)");
 208                 break;
 209         case SENSE_VENDOR_SPECIFIC:
 210                 printf ("Vendor specific)");
 211                 break;
 212         case SENSE_COPY_ABORTED:
 213                 printf ("Copy aborted)");
 214                 break;
 215         case SENSE_ABORTED_COMMAND:
 216                 printf ("Aborted Command)");
 217                 break;
 218         case SENSE_VOLUME_OVERFLOW:
 219                 printf ("Volume overflow)");
 220                 break;
 221         case SENSE_MISCOMPARE:
 222                 printf ("Misscompare\n");
 223                 break;
 224         default:
 225                 printf ("Illegal Sensecode\n");
 226                 break;
 227         }
 228         printf (" ASC %x ASCQ %x\n", pccb->sense_buf[12],
 229                 pccb->sense_buf[13]);
 230         printf ("    Status: ");
 231         switch (pccb->status) {
 232         case S_GOOD:
 233                 printf ("Good\n");
 234                 break;
 235         case S_CHECK_COND:
 236                 printf ("Check condition\n");
 237                 break;
 238         case S_COND_MET:
 239                 printf ("Condition Met\n");
 240                 break;
 241         case S_BUSY:
 242                 printf ("Busy\n");
 243                 break;
 244         case S_INT:
 245                 printf ("Intermediate\n");
 246                 break;
 247         case S_INT_COND_MET:
 248                 printf ("Intermediate condition met\n");
 249                 break;
 250         case S_CONFLICT:
 251                 printf ("Reservation conflict\n");
 252                 break;
 253         case S_TERMINATED:
 254                 printf ("Command terminated\n");
 255                 break;
 256         case S_QUEUE_FULL:
 257                 printf ("Task set full\n");
 258                 break;
 259         default:
 260                 printf ("unknown: %02X\n", pccb->status);
 261                 break;
 262         }
 263
 264 }
 265
 266
 267 /******************************************************************************
 268  * sets-up the SCSI controller
 269  * the base memory address is retrived via the pci_read_config_dword
 270  */
 271 void scsi_low_level_init(int busdevfunc)
 272 {
 273         unsigned int cmd;
 274         unsigned int addr;
 275         unsigned char vec;
 276
 277         pci_read_config_byte(busdevfunc, PCI_INTERRUPT_LINE, &vec);
 278         pci_read_config_dword(busdevfunc, PCI_BASE_ADDRESS_1, &addr);
 279
 280         addr = bus_to_phys(addr & ~0xf);
 281
 282         /*
 283          * Enable bus mastering in case this has not been done, yet.
 284          */
 285         pci_read_config_dword(busdevfunc, PCI_COMMAND, &cmd);
 286         cmd |= PCI_COMMAND_MASTER;
 287         pci_write_config_dword(busdevfunc, PCI_COMMAND, cmd);
 288
 289         scsi_mem_addr = addr;
 290
 291         scsi_chip_init();
 292         scsi_bus_reset();
 293 }
 294
 295
 296 /************************************************************************************
 297  * Low level Part of SCSI Driver
 298  */
 299
 300 /*
 301  * big-endian -> little endian conversion for the script
 302  */
 303 unsigned long swap_script(unsigned long val)
 304 {
 305         unsigned long tmp;
 306         tmp = ((val>>24)&0xff) | ((val>>8)&0xff00) | ((val<<8)&0xff0000) | ((val<<24)&0xff000000);
 307         return tmp;
 308 }
 309
 310
 311 void scsi_write_byte(ulong offset,unsigned char val)
 312 {
 313         out8(scsi_mem_addr+offset,val);
 314 }
 315
 316
 317 unsigned char scsi_read_byte(ulong offset)
 318 {
 319         return(in8(scsi_mem_addr+offset));
 320 }
 321
 322
 323 /********************************************************************************
 324  * interrupt handler
 325  */
 326 void handle_scsi_int(void)
 327 {
 328         unsigned char stat,stat1,stat2;
 329         unsigned short sstat;
 330         int i;
 331 #ifdef SCSI_SINGLE_STEP
 332         unsigned long tt;
 333 #endif
 334         stat=scsi_read_byte(ISTAT);
 335         if((stat & DIP)==DIP) { /* DMA Interrupt pending */
 336                 stat1=scsi_read_byte(DSTAT);
 337 #ifdef SCSI_SINGLE_STEP
 338                 if((stat1 & SSI)==SSI) {
 339                         tt=in32r(scsi_mem_addr+DSP);
 340                         if(((tt)>=start_script_select) && ((tt)<start_script_select+len_script_select)) {
 341                                 printf("select %d\n",(tt-start_script_select)>>2);
 342                                 goto end_single;
 343                         }
 344                         if(((tt)>=start_script_msgout) && ((tt)<start_script_msgout+len_script_msgout)) {
 345                                 printf("msgout %d\n",(tt-start_script_msgout)>>2);
 346                                 goto end_single;
 347                         }
 348                         if(((tt)>=start_script_msgin) && ((tt)<start_script_msgin+len_script_msgin)) {
 349                                 printf("msgin %d\n",(tt-start_script_msgin)>>2);
 350                                 goto end_single;
 351                         }
 352                         if(((tt)>=start_script_msg_ext) && ((tt)<start_script_msg_ext+len_script_msg_ext)) {
 353                                 printf("msgin_ext %d\n",(tt-start_script_msg_ext)>>2);
 354                                 goto end_single;
 355                         }
 356                         if(((tt)>=start_script_cmd) && ((tt)<start_script_cmd+len_script_cmd)) {
 357                                 printf("cmd %d\n",(tt-start_script_cmd)>>2);
 358                                 goto end_single;
 359                         }
 360                         if(((tt)>=start_script_data_in) && ((tt)<start_script_data_in+len_script_data_in)) {
 361                                 printf("data_in %d\n",(tt-start_script_data_in)>>2);
 362                                 goto end_single;
 363                         }
 364                         if(((tt)>=start_script_data_out) && ((tt)<start_script_data_out+len_script_data_out)) {
 365                                 printf("data_out %d\n",(tt-start_script_data_out)>>2);
 366                                 goto end_single;
 367                         }
 368                         if(((tt)>=start_script_status) && ((tt)<start_script_status+len_script_status)) {
 369                                 printf("status %d\n",(tt-start_script_status)>>2);
 370                                 goto end_single;
 371                         }
 372                         if(((tt)>=start_script_complete) && ((tt)<start_script_complete+len_script_complete)) {
 373                                 printf("complete %d\n",(tt-start_script_complete)>>2);
 374                                 goto end_single;
 375                         }
 376                         if(((tt)>=start_script_error) && ((tt)<start_script_error+len_script_error)) {
 377                                 printf("error %d\n",(tt-start_script_error)>>2);
 378                                 goto end_single;
 379                         }
 380                         if(((tt)>=start_script_reselection) && ((tt)<start_script_reselection+len_script_reselection)) {
 381                                 printf("reselection %d\n",(tt-start_script_reselection)>>2);
 382                                 goto end_single;
 383                         }
 384                         printf("sc: %lx\n",tt);
 385 end_single:
 386                         stat2=scsi_read_byte(DCNTL);
 387                         stat2|=STD;
 388                         scsi_write_byte(DCNTL,stat2);
 389                 }
 390 #endif
 391                 if((stat1 & SIR)==SIR) /* script interrupt */
 392                 {
 393                         int_stat[0]=in32(scsi_mem_addr+DSPS);
 394                 }
 395                 if((stat1 & DFE)==0) { /* fifo not epmty */
 396                         scsi_write_byte(CTEST3,CLF); /* Clear DMA FIFO */
 397                         stat2=scsi_read_byte(STEST3);
 398                         scsi_write_byte(STEST3,(stat2 | CSF)); /* Clear SCSI FIFO */
 399                 }
 400         }
 401         if((stat & SIP)==SIP) {  /* scsi interrupt */
 402                 sstat = (unsigned short)scsi_read_byte(SIST+1);
 403                 sstat <<=8;
 404                 sstat |= (unsigned short)scsi_read_byte(SIST);
 405                 for(i=0;i<3;i++) {
 406                         if(int_stat[i]==0)
 407                                 break; /* found an empty int status */
 408                 }
 409                 int_stat[i]=SCSI_INT_STATE | sstat;
 410                 stat1=scsi_read_byte(DSTAT);
 411                 if((stat1 & DFE)==0) { /* fifo not epmty */
 412                         scsi_write_byte(CTEST3,CLF); /* Clear DMA FIFO */
 413                         stat2=scsi_read_byte(STEST3);
 414                         scsi_write_byte(STEST3,(stat2 | CSF)); /* Clear SCSI FIFO */
 415                 }
 416         }
 417         if((stat & INTF)==INTF) { /* interrupt on Fly */
 418                 scsi_write_byte(ISTAT,stat); /* clear it */
 419                 for(i=0;i<3;i++) {
 420                         if(int_stat[i]==0)
 421                                 break; /* found an empty int status */
 422                 }
 423                 int_stat[i]=INT_ON_FY;
 424         }
 425 }
 426
 427 void scsi_bus_reset(void)
 428 {
 429         unsigned char t;
 430         int i;
 431         int end = CFG_SCSI_SPIN_UP_TIME*1000;
 432
 433         t=scsi_read_byte(SCNTL1);
 434         scsi_write_byte(SCNTL1,(t | CRST));
 435         udelay(50);
 436         scsi_write_byte(SCNTL1,t);
 437
 438         puts("waiting for devices to spin up");
 439         for(i=0;i<end;i++) {
 440                 udelay(1000); /* give the devices time to spin up */
 441                 if (i % 1000 == 0)
 442                         putc('.');
 443         }
 444         putc('\n');
 445         scsi_chip_init(); /* reinit the chip ...*/
 446
 447 }
 448
 449 void scsi_int_enable(void)
 450 {
 451         scsi_write_byte(SIEN,(unsigned char)scsi_int_mask);
 452         scsi_write_byte(SIEN+1,(unsigned char)(scsi_int_mask>>8));
 453         scsi_write_byte(DIEN,script_int_mask);
 454 }
 455
 456 void scsi_write_dsp(unsigned long start)
 457 {
 458         unsigned long val;
 459 #ifdef SCSI_SINGLE_STEP
 460         unsigned char t;
 461 #endif
 462         val = start;
 463         out32r(scsi_mem_addr + DSP,start);
 464 #ifdef SCSI_SINGLE_STEP
 465         t=scsi_read_byte(DCNTL);
 466   t|=STD;
 467         scsi_write_byte(DCNTL,t);
 468 #endif
 469 }
 470
 471 /* only used for debug purposes */
 472 void scsi_print_script(void)
 473 {
 474         printf("script_select @         0x%08lX\n",(unsigned long)&script_select[0]);
 475         printf("script_msgout @         0x%08lX\n",(unsigned long)&script_msgout[0]);
 476         printf("script_msgin @          0x%08lX\n",(unsigned long)&script_msgin[0]);
 477         printf("script_msgext @         0x%08lX\n",(unsigned long)&script_msg_ext[0]);
 478         printf("script_cmd @            0x%08lX\n",(unsigned long)&script_cmd[0]);
 479         printf("script_data_in @        0x%08lX\n",(unsigned long)&script_data_in[0]);
 480         printf("script_data_out @       0x%08lX\n",(unsigned long)&script_data_out[0]);
 481         printf("script_status @         0x%08lX\n",(unsigned long)&script_status[0]);
 482         printf("script_complete @       0x%08lX\n",(unsigned long)&script_complete[0]);
 483         printf("script_error @          0x%08lX\n",(unsigned long)&script_error[0]);
 484 }
 485
 486
 487 void scsi_set_script(ccb *pccb)
 488 {
 489         int busdevfunc = pccb->priv;
 490         int i;
 491         i=0;
 492         script_select[i++]=swap_script(SCR_REG_REG(GPREG, SCR_AND, 0xfe));
 493         script_select[i++]=0; /* LED ON */
 494         script_select[i++]=swap_script(SCR_CLR(SCR_TRG)); /* select initiator mode */
 495         script_select[i++]=0;
 496         /* script_select[i++]=swap_script(SCR_SEL_ABS_ATN | pccb->target << 16); */
 497         script_select[i++]=swap_script(SCR_SEL_ABS | pccb->target << 16);
 498         script_select[i++]=swap_script(phys_to_bus(&script_cmd[4])); /* error handling */
 499         script_select[i++]=swap_script(SCR_JUMP); /* next section */
 500         /*      script_select[i++]=swap_script((unsigned long)&script_msgout[0]); */ /* message out */
 501         script_select[i++]=swap_script(phys_to_bus(&script_cmd[0])); /* command out */
 502
 503 #ifdef SCSI_SINGLE_STEP
 504         start_script_select=(unsigned long)&script_select[0];
 505         len_script_select=i*4;
 506 #endif
 507
 508         i=0;
 509         script_msgout[i++]=swap_script(SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)));
 510         script_msgout[i++]=SIR_SEL_ATN_NO_MSG_OUT;
 511         script_msgout[i++]=swap_script( SCR_MOVE_ABS(1) ^ SCR_MSG_OUT);
 512         script_msgout[i++]=swap_script(phys_to_bus(&pccb->msgout[0]));
 513         script_msgout[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_COMMAND))); /* if Command phase */
 514         script_msgout[i++]=swap_script(phys_to_bus(&script_cmd[0])); /* switch to command */
 515         script_msgout[i++]=swap_script(SCR_INT); /* interrupt if not */
 516         script_msgout[i++]=SIR_MSG_OUT_NO_CMD;
 517
 518 #ifdef SCSI_SINGLE_STEP
 519         start_script_msgout=(unsigned long)&script_msgout[0];
 520         len_script_msgout=i*4;
 521 #endif
 522         i=0;
 523         script_cmd[i++]=swap_script(SCR_MOVE_ABS(pccb->cmdlen) ^ SCR_COMMAND);
 524         script_cmd[i++]=swap_script(phys_to_bus(&pccb->cmd[0]));
 525         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN))); /* message in ? */
 526         script_cmd[i++]=swap_script(phys_to_bus(&script_msgin[0]));
 527         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_DATA_OUT))); /* data out ? */
 528         script_cmd[i++]=swap_script(phys_to_bus(&script_data_out[0]));
 529         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_DATA_IN))); /* data in ? */
 530         script_cmd[i++]=swap_script(phys_to_bus(&script_data_in[0]));
 531         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_STATUS)));  /* status ? */
 532         script_cmd[i++]=swap_script(phys_to_bus(&script_status[0]));
 533         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND)));  /* command ? */
 534         script_cmd[i++]=swap_script(phys_to_bus(&script_cmd[0]));
 535         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT)));  /* message out ? */
 536         script_cmd[i++]=swap_script(phys_to_bus(&script_msgout[0]));
 537         script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_MSG_IN))); /* just for error handling message in ? */
 538         script_cmd[i++]=swap_script(phys_to_bus(&script_msgin[0]));
 539         script_cmd[i++]=swap_script(SCR_INT); /* interrupt if not */
 540         script_cmd[i++]=SIR_CMD_OUT_ILL_PH;
 541 #ifdef SCSI_SINGLE_STEP
 542         start_script_cmd=(unsigned long)&script_cmd[0];
 543         len_script_cmd=i*4;
 544 #endif
 545         i=0;
 546         script_data_out[i++]=swap_script(SCR_MOVE_ABS(pccb->datalen)^ SCR_DATA_OUT); /* move */
 547         script_data_out[i++]=swap_script(phys_to_bus(pccb->pdata)); /* pointer to buffer */
 548         script_data_out[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_STATUS)));
 549         script_data_out[i++]=swap_script(phys_to_bus(&script_status[0]));
 550         script_data_out[i++]=swap_script(SCR_INT);
 551         script_data_out[i++]=SIR_DATA_OUT_ERR;
 552
 553 #ifdef SCSI_SINGLE_STEP
 554         start_script_data_out=(unsigned long)&script_data_out[0];
 555         len_script_data_out=i*4;
 556 #endif
 557         i=0;
 558         script_data_in[i++]=swap_script(SCR_MOVE_ABS(pccb->datalen)^ SCR_DATA_IN); /* move  */
 559         script_data_in[i++]=swap_script(phys_to_bus(pccb->pdata)); /* pointer to buffer */
 560         script_data_in[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_STATUS)));
 561         script_data_in[i++]=swap_script(phys_to_bus(&script_status[0]));
 562         script_data_in[i++]=swap_script(SCR_INT);
 563         script_data_in[i++]=SIR_DATA_IN_ERR;
 564 #ifdef SCSI_SINGLE_STEP
 565         start_script_data_in=(unsigned long)&script_data_in[0];
 566         len_script_data_in=i*4;
 567 #endif
 568         i=0;
 569         script_msgin[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN);
 570         script_msgin[i++]=swap_script(phys_to_bus(&pccb->msgin[0]));
 571         script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_COMPLETE)));
 572         script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
 573         script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_DISCONNECT)));
 574         script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
 575         script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_SAVE_DP)));
 576         script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
 577         script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_RESTORE_DP)));
 578         script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
 579         script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)));
 580         script_msgin[i++]=swap_script(phys_to_bus(&script_msg_ext[0]));
 581         script_msgin[i++]=swap_script(SCR_INT);
 582         script_msgin[i++]=SIR_MSG_RECEIVED;
 583 #ifdef SCSI_SINGLE_STEP
 584         start_script_msgin=(unsigned long)&script_msgin[0];
 585         len_script_msgin=i*4;
 586 #endif
 587         i=0;
 588         script_msg_ext[i++]=swap_script(SCR_CLR (SCR_ACK)); /* clear ACK */
 589         script_msg_ext[i++]=0;
 590         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* assuming this is the msg length */
 591         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[1]));
 592         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 593         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 594         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
 595         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[2]));
 596         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 597         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 598         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
 599         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[3]));
 600         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 601         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 602         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
 603         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[4]));
 604         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 605         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 606         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
 607         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[5]));
 608         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 609         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 610         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
 611         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[6]));
 612         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 613         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 614         script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
 615         script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[7]));
 616         script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
 617         script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
 618         script_msg_ext[i++]=swap_script(SCR_INT);
 619         script_msg_ext[i++]=SIR_MSG_OVER7;
 620 #ifdef SCSI_SINGLE_STEP
 621         start_script_msg_ext=(unsigned long)&script_msg_ext[0];
 622         len_script_msg_ext=i*4;
 623 #endif
 624         i=0;
 625         script_status[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_STATUS);
 626         script_status[i++]=swap_script(phys_to_bus(&pccb->status));
 627         script_status[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)));
 628         script_status[i++]=swap_script(phys_to_bus(&script_msgin[0]));
 629         script_status[i++]=swap_script(SCR_INT);
 630         script_status[i++]=SIR_STATUS_ILL_PH;
 631 #ifdef SCSI_SINGLE_STEP
 632         start_script_status=(unsigned long)&script_status[0];
 633         len_script_status=i*4;
 634 #endif
 635         i=0;
 636         script_complete[i++]=swap_script(SCR_REG_REG (SCNTL2, SCR_AND, 0x7f));
 637         script_complete[i++]=0;
 638         script_complete[i++]=swap_script(SCR_CLR (SCR_ACK|SCR_ATN));
 639         script_complete[i++]=0;
 640         script_complete[i++]=swap_script(SCR_WAIT_DISC);
 641         script_complete[i++]=0;
 642         script_complete[i++]=swap_script(SCR_REG_REG(GPREG, SCR_OR, 0x01));
 643         script_complete[i++]=0; /* LED OFF */
 644         script_complete[i++]=swap_script(SCR_INT);
 645         script_complete[i++]=SIR_COMPLETE;
 646 #ifdef SCSI_SINGLE_STEP
 647         start_script_complete=(unsigned long)&script_complete[0];
 648         len_script_complete=i*4;
 649 #endif
 650         i=0;
 651         script_error[i++]=swap_script(SCR_INT); /* interrupt if error */
 652         script_error[i++]=SIR_SCRIPT_ERROR;
 653 #ifdef SCSI_SINGLE_STEP
 654         start_script_error=(unsigned long)&script_error[0];
 655         len_script_error=i*4;
 656 #endif
 657         i=0;
 658         script_reselection[i++]=swap_script(SCR_CLR (SCR_TRG)); /* target status */
 659         script_reselection[i++]=0;
 660         script_reselection[i++]=swap_script(SCR_WAIT_RESEL);
 661         script_reselection[i++]=swap_script(phys_to_bus(&script_select[0])); /* len = 4 */
 662 #ifdef SCSI_SINGLE_STEP
 663         start_script_reselection=(unsigned long)&script_reselection[0];
 664         len_script_reselection=i*4;
 665 #endif
 666 }
 667
 668
 669 void scsi_issue(ccb *pccb)
 670 {
 671         int busdevfunc = pccb->priv;
 672         int i;
 673         unsigned short sstat;
 674         int retrycnt;  /* retry counter */
 675         for(i=0;i<3;i++)
 676                 int_stat[i]=0; /* delete all int status */
 677         /* struct pccb must be set-up correctly */
 678         retrycnt=0;
 679         PRINTF("ID %d issue cmd %02X\n",pccb->target,pccb->cmd[0]);
 680         pccb->trans_bytes=0; /* no bytes transfered yet */
 681         scsi_set_script(pccb); /* fill in SCRIPT                */
 682         scsi_int_mask=STO | UDC | MA; /* | CMP; / * Interrupts which are enabled */
 683         script_int_mask=0xff; /* enable all Ints */
 684         scsi_int_enable();
 685         scsi_write_dsp(phys_to_bus(&script_select[0])); /* start script */
 686         /* now we have to wait for IRQs */
 687 retry:
 688         /*
 689          * This version of the driver is _not_ interrupt driven,
 690          * but polls the chip's interrupt registers (ISTAT, DSTAT).
 691          */
 692         while(int_stat[0]==0)
 693                 handle_scsi_int();
 694
 695         if(int_stat[0]==SIR_COMPLETE) {
 696                 if(pccb->msgin[0]==M_DISCONNECT) {
 697                         PRINTF("Wait for reselection\n");
 698                         for(i=0;i<3;i++)
 699                                 int_stat[i]=0; /* delete all int status */
 700                         scsi_write_dsp(phys_to_bus(&script_reselection[0])); /* start reselection script */
 701                         goto retry;
 702                 }
 703                 pccb->contr_stat=SIR_COMPLETE;
 704                 return;
 705         }
 706         if((int_stat[0] & SCSI_INT_STATE)==SCSI_INT_STATE) { /* scsi interrupt */
 707                 sstat=(unsigned short)int_stat[0];
 708                 if((sstat & STO)==STO) { /* selection timeout */
 709                         pccb->contr_stat=SCSI_SEL_TIME_OUT;
 710                         scsi_write_byte(GPREG,0x01);
 711                         PRINTF("ID: %X Selection Timeout\n",pccb->target);
 712                         return;
 713                 }
 714                 if((sstat & UDC)==UDC) { /* unexpected disconnect */
 715                         pccb->contr_stat=SCSI_UNEXP_DIS;
 716                         scsi_write_byte(GPREG,0x01);
 717                         PRINTF("ID: %X Unexpected Disconnect\n",pccb->target);
 718                         return;
 719                 }
 720                 if((sstat & RSL)==RSL) { /* reselection */
 721                         pccb->contr_stat=SCSI_UNEXP_DIS;
 722                         scsi_write_byte(GPREG,0x01);
 723                         PRINTF("ID: %X Unexpected Disconnect\n",pccb->target);
 724                         return;
 725                 }
 726                 if(((sstat & MA)==MA)||((sstat & HTH)==HTH)) { /* phase missmatch */
 727                         if(retrycnt<SCSI_MAX_RETRY) {
 728                                 pccb->trans_bytes=pccb->datalen -
 729                                         ((unsigned long)scsi_read_byte(DBC) |
 730                                         ((unsigned long)scsi_read_byte(DBC+1)<<8) |
 731                                         ((unsigned long)scsi_read_byte(DBC+2)<<16));
 732                                 for(i=0;i<3;i++)
 733                                         int_stat[i]=0; /* delete all int status */
 734                                 retrycnt++;
 735                                 PRINTF("ID: %X Phase Missmatch Retry %d Phase %02X transfered %lx\n",
 736                                                 pccb->target,retrycnt,scsi_read_byte(SBCL),pccb->trans_bytes);
 737                                 scsi_write_dsp(phys_to_bus(&script_cmd[4])); /* start retry script */
 738                                 goto retry;
 739                         }
 740                         if((sstat & MA)==MA)
 741                                 pccb->contr_stat=SCSI_MA_TIME_OUT;
 742                         else
 743                                 pccb->contr_stat=SCSI_HNS_TIME_OUT;
 744                         PRINTF("Phase Missmatch stat %lx\n",pccb->contr_stat);
 745                         return;
 746                 } /* no phase int */
 747 /*              if((sstat & CMP)==CMP) {
 748                         pccb->contr_stat=SIR_COMPLETE;
 749                         return;
 750                 }
 751 */
 752                 PRINTF("SCSI INT %lX\n",int_stat[0]);
 753                 pccb->contr_stat=int_stat[0];
 754                 return;
 755         } /* end scsi int */
 756         PRINTF("SCRIPT INT %lX phase %02X\n",int_stat[0],scsi_read_byte(SBCL));
 757         pccb->contr_stat=int_stat[0];
 758         return;
 759 }
 760
 761 int scsi_exec(ccb *pccb)
 762 {
 763         unsigned char tmpcmd[16],tmpstat;
 764         int i,retrycnt,t;
 765         unsigned long transbytes,datalen;
 766         unsigned char *tmpptr;
 767         retrycnt=0;
 768 retry:
 769         scsi_issue(pccb);
 770         if(pccb->contr_stat!=SIR_COMPLETE)
 771                 return FALSE;
 772         if(pccb->status==S_GOOD)
 773                 return TRUE;
 774         if(pccb->status==S_CHECK_COND) { /* check condition */
 775                 for(i=0;i<16;i++)
 776                         tmpcmd[i]=pccb->cmd[i];
 777                 pccb->cmd[0]=SCSI_REQ_SENSE;
 778                 pccb->cmd[1]=pccb->lun<<5;
 779                 pccb->cmd[2]=0;
 780                 pccb->cmd[3]=0;
 781                 pccb->cmd[4]=14;
 782                 pccb->cmd[5]=0;
 783                 pccb->cmdlen=6;
 784                 pccb->msgout[0]=SCSI_IDENTIFY;
 785                 transbytes=pccb->trans_bytes;
 786                 tmpptr=pccb->pdata;
 787                 pccb->pdata=&pccb->sense_buf[0];
 788                 datalen=pccb->datalen;
 789                 pccb->datalen=14;
 790                 tmpstat=pccb->status;
 791                 scsi_issue(pccb);
 792                 for(i=0;i<16;i++)
 793                         pccb->cmd[i]=tmpcmd[i];
 794                 pccb->trans_bytes=transbytes;
 795                 pccb->pdata=tmpptr;
 796                 pccb->datalen=datalen;
 797                 pccb->status=tmpstat;
 798                 PRINTF("Request_sense sense key %x ASC %x ASCQ %x\n",pccb->sense_buf[2]&0x0f,
 799                         pccb->sense_buf[12],pccb->sense_buf[13]);
 800                 switch(pccb->sense_buf[2]&0xf) {
 801                         case SENSE_NO_SENSE:
 802                         case SENSE_RECOVERED_ERROR:
 803                                 /* seems to be ok */
 804                                 return TRUE;
 805                                 break;
 806                         case SENSE_NOT_READY:
 807                                 if((pccb->sense_buf[12]!=0x04)||(pccb->sense_buf[13]!=0x01)) {
 808                                         /* if device is not in process of becoming ready */
 809                                         return FALSE;
 810                                         break;
 811                                 } /* else fall through */
 812                         case SENSE_UNIT_ATTENTION:
 813                                 if(retrycnt<SCSI_MAX_RETRY_NOT_READY) {
 814                                         PRINTF("Target %d not ready, retry %d\n",pccb->target,retrycnt);
 815                                         for(t=0;t<SCSI_NOT_READY_TIME_OUT;t++)
 816                                                 udelay(1000); /* 1sec wait */
 817                                         retrycnt++;
 818                                         goto retry;
 819                                 }
 820                                 PRINTF("Target %d not ready, %d retried\n",pccb->target,retrycnt);
 821                                 return FALSE;
 822                         default:
 823                                 return FALSE;
 824                 }
 825         }
 826         PRINTF("Status = %X\n",pccb->status);
 827         return FALSE;
 828 }
 829
 830
 831 void scsi_chip_init(void)
 832 {
 833         /* first we issue a soft reset */
 834         scsi_write_byte(ISTAT,SRST);
 835         udelay(1000);
 836         scsi_write_byte(ISTAT,0);
 837         /* setup chip */
 838         scsi_write_byte(SCNTL0,0xC0); /* full arbitration no start, no message, parity disabled, master */
 839         scsi_write_byte(SCNTL1,0x00);
 840         scsi_write_byte(SCNTL2,0x00);
 841 #ifndef CFG_SCSI_SYM53C8XX_CCF    /* config value for none 40 mhz clocks */
 842         scsi_write_byte(SCNTL3,0x13); /* synchronous clock 40/4=10MHz, asynchronous 40MHz */
 843 #else
 844         scsi_write_byte(SCNTL3,CFG_SCSI_SYM53C8XX_CCF); /* config value for none 40 mhz clocks */
 845 #endif
 846         scsi_write_byte(SCID,0x47); /* ID=7, enable reselection */
 847         scsi_write_byte(SXFER,0x00); /* synchronous transfer period 10MHz, asynchronous */
 848         scsi_write_byte(SDID,0x00);  /* targed SCSI ID = 0 */
 849         scsi_int_mask=0x0000; /* no Interrupt is enabled */
 850         script_int_mask=0x00;
 851         scsi_int_enable();
 852         scsi_write_byte(GPREG,0x01); /* GPIO0 is LED (off) */
 853         scsi_write_byte(GPCNTL,0x0E); /* GPIO0 is Output */
 854         scsi_write_byte(STIME0,0x08); /* handshake timer disabled, selection timeout 512msec */
 855         scsi_write_byte(RESPID,0x80); /* repond only to the own ID (reselection) */
 856         scsi_write_byte(STEST1,0x00); /* not isolated, SCLK is used */
 857         scsi_write_byte(STEST2,0x00); /* no Lowlevel Mode? */
 858         scsi_write_byte(STEST3,0x80); /* enable tolerANT */
 859         scsi_write_byte(CTEST3,0x04); /* clear FIFO */
 860         scsi_write_byte(CTEST4,0x00);
 861         scsi_write_byte(CTEST5,0x00);
 862 #ifdef SCSI_SINGLE_STEP
 863 /*      scsi_write_byte(DCNTL,IRQM | SSM);      */
 864         scsi_write_byte(DCNTL,IRQD | SSM);
 865         scsi_write_byte(DMODE,MAN);
 866 #else
 867 /*      scsi_write_byte(DCNTL,IRQM);    */
 868         scsi_write_byte(DCNTL,IRQD);
 869         scsi_write_byte(DMODE,0x00);
 870 #endif
 871 }
 872 #endif
 873
 874
 875 #endif /* CONFIG_SCSI_SYM53C8XX */