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