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