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* Patch by Arun Dharankar, 24 Mar 2003:
[people/ms/u-boot.git] / drivers / sym53c8xx.c
CommitLineData
1df49e27
WD		 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 <cmd_boot.h>
42#include <pci.h>
43#include <asm/processor.h>
44#include <sym53c8xx.h>
45#include <scsi.h>
46
47#undef SYM53C8XX_DEBUG
48
49#ifdef SYM53C8XX_DEBUG
50#define PRINTF(fmt,args...) printf (fmt ,##args)
51#else
52#define PRINTF(fmt,args...)
53#endif
54
55#if (CONFIG_COMMANDS & CFG_CMD_SCSI) && defined(CONFIG_SCSI_SYM53C8XX)
56
57#undef SCSI_SINGLE_STEP
58/*
59 * Single Step is only used for debug purposes
60 */
61#ifdef SCSI_SINGLE_STEP
62static unsigned long start_script_select;
63static unsigned long start_script_msgout;
64static unsigned long start_script_msgin;
65static unsigned long start_script_msg_ext;
66static unsigned long start_script_cmd;
67static unsigned long start_script_data_in;
68static unsigned long start_script_data_out;
69static unsigned long start_script_status;
70static unsigned long start_script_complete;
71static unsigned long start_script_error;
72static unsigned long start_script_reselection;
73static unsigned int len_script_select;
74static unsigned int len_script_msgout;
75static unsigned int len_script_msgin;
76static unsigned int len_script_msg_ext;
77static unsigned int len_script_cmd;
78static unsigned int len_script_data_in;
79static unsigned int len_script_data_out;
80static unsigned int len_script_status;
81static unsigned int len_script_complete;
82static unsigned int len_script_error;
83static unsigned int len_script_reselection;
84#endif
85
86
87static unsigned short scsi_int_mask; /* shadow register for SCSI related interrupts */
88static unsigned char script_int_mask; /* shadow register for SCRIPT related interrupts */
89static unsigned long script_select[8]; /* script for selection */
90static unsigned long script_msgout[8]; /* script for message out phase (NOT USED) */
91static unsigned long script_msgin[14]; /* script for message in phase */
92static unsigned long script_msg_ext[32]; /* script for message in phase when more than 1 byte message */
93static unsigned long script_cmd[18]; /* script for command phase */
94static unsigned long script_data_in[8]; /* script for data in phase */
95static unsigned long script_data_out[8]; /* script for data out phase */
96static unsigned long script_status[6]; /* script for status phase */
97static unsigned long script_complete[10]; /* script for complete */
98static unsigned long script_reselection[4]; /* script for reselection (NOT USED) */
99static unsigned long script_error[2]; /* script for error handling */
100
101static unsigned long int_stat[3]; /* interrupt status */
102static unsigned long scsi_mem_addr; /* base memory address =SCSI_MEM_ADDRESS; */
103
104#define bus_to_phys(a) pci_mem_to_phys(busdevfunc, (unsigned long) (a))
105#define phys_to_bus(a) pci_phys_to_mem(busdevfunc, (unsigned long) (a))
106
107#define SCSI_MAX_RETRY 3 /* number of retries in scsi_issue() */
108
109#define SCSI_MAX_RETRY_NOT_READY 10 /* number of retries when device is not ready */
110#define SCSI_NOT_READY_TIME_OUT 500 /* timeout per retry when not ready */
111
112/*********************************************************************************
113 * forward declerations
114 */
115
116void scsi_chip_init(void);
117void handle_scsi_int(void);
118
119
120/********************************************************************************
121 * reports SCSI errors to the user
122 */
123void scsi_print_error(ccb *pccb)
124{
125 int i;
126 printf("SCSI Error: Target %d LUN %d Command %02X\n",pccb->target, pccb->lun, pccb->cmd[0]);
127 printf(" CCB: ");
128 for(i=0;i<pccb->cmdlen;i++)
129 printf("%02X ",pccb->cmd[i]);
130 printf("(len=%d)\n",pccb->cmdlen);
131 printf(" Cntrl: ");
132 switch(pccb->contr_stat) {
133 case SIR_COMPLETE: printf("Complete (no Error)\n"); break;
134 case SIR_SEL_ATN_NO_MSG_OUT: printf("Selected with ATN no MSG out phase\n"); break;
135 case SIR_CMD_OUT_ILL_PH: printf("Command out illegal phase\n"); break;
136 case SIR_MSG_RECEIVED: printf("MSG received Error\n"); break;
137 case SIR_DATA_IN_ERR: printf("Data in Error\n"); break;
138 case SIR_DATA_OUT_ERR: printf("Data out Error\n"); break;
139 case SIR_SCRIPT_ERROR: printf("Script Error\n"); break;
140 case SIR_MSG_OUT_NO_CMD: printf("MSG out no Command phase\n"); break;
141 case SIR_MSG_OVER7: printf("MSG in over 7 bytes\n"); break;
142 case INT_ON_FY: printf("Interrupt on fly\n"); break;
143 case SCSI_SEL_TIME_OUT: printf("SCSI Selection Timeout\n"); break;
144 case SCSI_HNS_TIME_OUT: printf("SCSI Handshake Timeout\n"); break;
145 case SCSI_MA_TIME_OUT: printf("SCSI Phase Error\n"); break;
146 case SCSI_UNEXP_DIS: printf("SCSI unexpected disconnect\n"); break;
147 default: printf("unknown status %lx\n",pccb->contr_stat); break;
148 }
149 printf(" Sense: SK %x (",pccb->sense_buf[2]&0x0f);
150 switch(pccb->sense_buf[2]&0xf) {
151 case SENSE_NO_SENSE: printf("No Sense)"); break;
152 case SENSE_RECOVERED_ERROR: printf("Recovered Error)"); break;
153 case SENSE_NOT_READY: printf("Not Ready)"); break;
154 case SENSE_MEDIUM_ERROR: printf("Medium Error)"); break;
155 case SENSE_HARDWARE_ERROR: printf("Hardware Error)"); break;
156 case SENSE_ILLEGAL_REQUEST: printf("Illegal request)"); break;
157 case SENSE_UNIT_ATTENTION: printf("Unit Attention)"); break;
158 case SENSE_DATA_PROTECT: printf("Data Protect)"); break;
159 case SENSE_BLANK_CHECK: printf("Blank check)"); break;
160 case SENSE_VENDOR_SPECIFIC: printf("Vendor specific)"); break;
161 case SENSE_COPY_ABORTED: printf("Copy aborted)"); break;
162 case SENSE_ABORTED_COMMAND: printf("Aborted Command)"); break;
163 case SENSE_VOLUME_OVERFLOW: printf("Volume overflow)"); break;
164 case SENSE_MISCOMPARE: printf("Misscompare\n"); break;
165 default: printf("Illegal Sensecode\n"); break;
166 }
167 printf(" ASC %x ASCQ %x\n",pccb->sense_buf[12],pccb->sense_buf[13]);
168 printf(" Status: ");
169 switch(pccb->status) {
170 case S_GOOD : printf("Good\n"); break;
171 case S_CHECK_COND: printf("Check condition\n"); break;
172 case S_COND_MET: printf("Condition Met\n"); break;
173 case S_BUSY: printf("Busy\n"); break;
174 case S_INT: printf("Intermediate\n"); break;
175 case S_INT_COND_MET: printf("Intermediate condition met\n"); break;
176 case S_CONFLICT: printf("Reservation conflict\n"); break;
177 case S_TERMINATED: printf("Command terminated\n"); break;
178 case S_QUEUE_FULL: printf("Task set full\n"); break;
179 default: printf("unknown: %02X\n",pccb->status); break;
180 }
181
182}
183
184
185
186/******************************************************************************
187 * sets-up the SCSI controller
188 * the base memory address is retrived via the pci_read_config_dword
189 */
190void scsi_low_level_init(int busdevfunc)
191{
192 unsigned int cmd;
193 unsigned int addr;
194 unsigned char vec;
195
196 pci_read_config_byte(busdevfunc, PCI_INTERRUPT_LINE, &vec);
197 pci_read_config_dword(busdevfunc, PCI_BASE_ADDRESS_1, &addr);
198
199 addr = bus_to_phys(addr & ~0xf);
200
201 /*
202 * Enable bus mastering in case this has not been done, yet.
203 */
204 pci_read_config_dword(busdevfunc, PCI_COMMAND, &cmd);
205 cmd |= PCI_COMMAND_MASTER;
206 pci_write_config_dword(busdevfunc, PCI_COMMAND, cmd);
207
208 scsi_mem_addr = addr;
209
210 scsi_chip_init();
211 scsi_bus_reset();
212}
213
214
215/************************************************************************************
216 * Low level Part of SCSI Driver
217 */
218
219/*
220 * big-endian -> little endian conversion for the script
221 */
222unsigned long swap_script(unsigned long val)
223{
224 unsigned long tmp;
225 tmp = ((val>>24)&0xff) | ((val>>8)&0xff00) | ((val<<8)&0xff0000) | ((val<<24)&0xff000000);
226 return tmp;
227}
228
229
230void scsi_write_byte(ulong offset,unsigned char val)
231{
232 out8(scsi_mem_addr+offset,val);
233}
234
235
236unsigned char scsi_read_byte(ulong offset)
237{
238 return(in8(scsi_mem_addr+offset));
239}
240
241
242/********************************************************************************
243 * interrupt handler
244 */
245void handle_scsi_int(void)
246{
247 unsigned char stat,stat1,stat2;
248 unsigned short sstat;
249 int i;
250#ifdef SCSI_SINGLE_STEP
251 unsigned long tt;
252#endif
253 stat=scsi_read_byte(ISTAT);
254 if((stat & DIP)==DIP) { /* DMA Interrupt pending */
255 stat1=scsi_read_byte(DSTAT);
256#ifdef SCSI_SINGLE_STEP
257 if((stat1 & SSI)==SSI)
258 {
259 tt=in32r(scsi_mem_addr+DSP);
260 if(((tt)>=start_script_select) && ((tt)<start_script_select+len_script_select)) {
261 printf("select %d\n",(tt-start_script_select)>>2);
262 goto end_single;
263 }
264 if(((tt)>=start_script_msgout) && ((tt)<start_script_msgout+len_script_msgout)) {
265 printf("msgout %d\n",(tt-start_script_msgout)>>2);
266 goto end_single;
267 }
268 if(((tt)>=start_script_msgin) && ((tt)<start_script_msgin+len_script_msgin)) {
269 printf("msgin %d\n",(tt-start_script_msgin)>>2);
270 goto end_single;
271 }
272 if(((tt)>=start_script_msg_ext) && ((tt)<start_script_msg_ext+len_script_msg_ext)) {
273 printf("msgin_ext %d\n",(tt-start_script_msg_ext)>>2);
274 goto end_single;
275 }
276 if(((tt)>=start_script_cmd) && ((tt)<start_script_cmd+len_script_cmd)) {
277 printf("cmd %d\n",(tt-start_script_cmd)>>2);
278 goto end_single;
279 }
280 if(((tt)>=start_script_data_in) && ((tt)<start_script_data_in+len_script_data_in)) {
281 printf("data_in %d\n",(tt-start_script_data_in)>>2);
282 goto end_single;
283 }
284 if(((tt)>=start_script_data_out) && ((tt)<start_script_data_out+len_script_data_out)) {
285 printf("data_out %d\n",(tt-start_script_data_out)>>2);
286 goto end_single;
287 }
288 if(((tt)>=start_script_status) && ((tt)<start_script_status+len_script_status)) {
289 printf("status %d\n",(tt-start_script_status)>>2);
290 goto end_single;
291 }
292 if(((tt)>=start_script_complete) && ((tt)<start_script_complete+len_script_complete)) {
293 printf("complete %d\n",(tt-start_script_complete)>>2);
294 goto end_single;
295 }
296 if(((tt)>=start_script_error) && ((tt)<start_script_error+len_script_error)) {
297 printf("error %d\n",(tt-start_script_error)>>2);
298 goto end_single;
299 }
300 if(((tt)>=start_script_reselection) && ((tt)<start_script_reselection+len_script_reselection)) {
301 printf("reselection %d\n",(tt-start_script_reselection)>>2);
302 goto end_single;
303 }
304 printf("sc: %lx\n",tt);
305end_single:
306 stat2=scsi_read_byte(DCNTL);
307 stat2|=STD;
308 scsi_write_byte(DCNTL,stat2);
309 }
310#endif
311 if((stat1 & SIR)==SIR) /* script interrupt */
312 {
313 int_stat[0]=in32(scsi_mem_addr+DSPS);
314 }
315 if((stat1 & DFE)==0) { /* fifo not epmty */
316 scsi_write_byte(CTEST3,CLF); /* Clear DMA FIFO */
317 stat2=scsi_read_byte(STEST3);
318 scsi_write_byte(STEST3,(stat2 | CSF)); /* Clear SCSI FIFO */
319 }
320 }
321 if((stat & SIP)==SIP) { /* scsi interrupt */
322 sstat = (unsigned short)scsi_read_byte(SIST+1);
323 sstat <<=8;
324 sstat |= (unsigned short)scsi_read_byte(SIST);
325 for(i=0;i<3;i++) {
326 if(int_stat[i]==0)
327 break; /* found an empty int status */
328 }
329 int_stat[i]=SCSI_INT_STATE | sstat;
330 stat1=scsi_read_byte(DSTAT);
331 if((stat1 & DFE)==0) { /* fifo not epmty */
332 scsi_write_byte(CTEST3,CLF); /* Clear DMA FIFO */
333 stat2=scsi_read_byte(STEST3);
334 scsi_write_byte(STEST3,(stat2 | CSF)); /* Clear SCSI FIFO */
335 }
336 }
337 if((stat & INTF)==INTF) { /* interrupt on Fly */
338 scsi_write_byte(ISTAT,stat); /* clear it */
339 for(i=0;i<3;i++) {
340 if(int_stat[i]==0)
341 break; /* found an empty int status */
342 }
343 int_stat[i]=INT_ON_FY;
344 }
345}
346
347void scsi_bus_reset(void)
348{
349 unsigned char t;
350 int i;
351 int end = CFG_SCSI_SPIN_UP_TIME*1000;
352
353 t=scsi_read_byte(SCNTL1);
354 scsi_write_byte(SCNTL1,(t | CRST));
355 udelay(50);
356 scsi_write_byte(SCNTL1,t);
357
358 puts("waiting for devices to spin up");
359 for(i=0;i<end;i++) {
360 udelay(1000); /* give the devices time to spin up */
361 if (i % 1000 == 0)
362 putc('.');
363 }
364 putc('\n');
365 scsi_chip_init(); /* reinit the chip ...*/
366
367}
368
369void scsi_int_enable(void)
370{
371 scsi_write_byte(SIEN,(unsigned char)scsi_int_mask);
372 scsi_write_byte(SIEN+1,(unsigned char)(scsi_int_mask>>8));
373 scsi_write_byte(DIEN,script_int_mask);
374}
375
376void scsi_write_dsp(unsigned long start)
377{
378 unsigned long val;
379#ifdef SCSI_SINGLE_STEP
380 unsigned char t;
381#endif
382 val = start;
383 out32r(scsi_mem_addr + DSP,start);
384#ifdef SCSI_SINGLE_STEP
385 t=scsi_read_byte(DCNTL);
386 t|=STD;
387 scsi_write_byte(DCNTL,t);
388#endif
389}
390
391/* only used for debug purposes */
392void scsi_print_script(void)
393{
394 printf("script_select @ 0x%08lX\n",(unsigned long)&script_select[0]);
395 printf("script_msgout @ 0x%08lX\n",(unsigned long)&script_msgout[0]);
396 printf("script_msgin @ 0x%08lX\n",(unsigned long)&script_msgin[0]);
397 printf("script_msgext @ 0x%08lX\n",(unsigned long)&script_msg_ext[0]);
398 printf("script_cmd @ 0x%08lX\n",(unsigned long)&script_cmd[0]);
399 printf("script_data_in @ 0x%08lX\n",(unsigned long)&script_data_in[0]);
400 printf("script_data_out @ 0x%08lX\n",(unsigned long)&script_data_out[0]);
401 printf("script_status @ 0x%08lX\n",(unsigned long)&script_status[0]);
402 printf("script_complete @ 0x%08lX\n",(unsigned long)&script_complete[0]);
403 printf("script_error @ 0x%08lX\n",(unsigned long)&script_error[0]);
404}
405
406
407
408void scsi_set_script(ccb *pccb)
409{
410 int busdevfunc = pccb->priv;
411 int i;
412 i=0;
413 script_select[i++]=swap_script(SCR_REG_REG(GPREG, SCR_AND, 0xfe));
414 script_select[i++]=0; /* LED ON */
415 script_select[i++]=swap_script(SCR_CLR(SCR_TRG)); /* select initiator mode */
416 script_select[i++]=0;
417 /* script_select[i++]=swap_script(SCR_SEL_ABS_ATN | pccb->target << 16); */
418 script_select[i++]=swap_script(SCR_SEL_ABS | pccb->target << 16);
419 script_select[i++]=swap_script(phys_to_bus(&script_cmd[4])); /* error handling */
420 script_select[i++]=swap_script(SCR_JUMP); /* next section */
421 /* script_select[i++]=swap_script((unsigned long)&script_msgout[0]); */ /* message out */
422 script_select[i++]=swap_script(phys_to_bus(&script_cmd[0])); /* command out */
423
424#ifdef SCSI_SINGLE_STEP
425 start_script_select=(unsigned long)&script_select[0];
426 len_script_select=i*4;
427#endif
428
429 i=0;
430 script_msgout[i++]=swap_script(SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT)));
431 script_msgout[i++]=SIR_SEL_ATN_NO_MSG_OUT;
432 script_msgout[i++]=swap_script( SCR_MOVE_ABS(1) ^ SCR_MSG_OUT);
433 script_msgout[i++]=swap_script(phys_to_bus(&pccb->msgout[0]));
434 script_msgout[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_COMMAND))); /* if Command phase */
435 script_msgout[i++]=swap_script(phys_to_bus(&script_cmd[0])); /* switch to command */
436 script_msgout[i++]=swap_script(SCR_INT); /* interrupt if not */
437 script_msgout[i++]=SIR_MSG_OUT_NO_CMD;
438
439#ifdef SCSI_SINGLE_STEP
440 start_script_msgout=(unsigned long)&script_msgout[0];
441 len_script_msgout=i*4;
442#endif
443 i=0;
444 script_cmd[i++]=swap_script(SCR_MOVE_ABS(pccb->cmdlen) ^ SCR_COMMAND);
445 script_cmd[i++]=swap_script(phys_to_bus(&pccb->cmd[0]));
446 script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN))); /* message in ? */
447 script_cmd[i++]=swap_script(phys_to_bus(&script_msgin[0]));
448 script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_DATA_OUT))); /* data out ? */
449 script_cmd[i++]=swap_script(phys_to_bus(&script_data_out[0]));
450 script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_DATA_IN))); /* data in ? */
451 script_cmd[i++]=swap_script(phys_to_bus(&script_data_in[0]));
452 script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_STATUS))); /* status ? */
453 script_cmd[i++]=swap_script(phys_to_bus(&script_status[0]));
454 script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND))); /* command ? */
455 script_cmd[i++]=swap_script(phys_to_bus(&script_cmd[0]));
456 script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT))); /* message out ? */
457 script_cmd[i++]=swap_script(phys_to_bus(&script_msgout[0]));
458 script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_MSG_IN))); /* just for error handling message in ? */
459 script_cmd[i++]=swap_script(phys_to_bus(&script_msgin[0]));
460 script_cmd[i++]=swap_script(SCR_INT); /* interrupt if not */
461 script_cmd[i++]=SIR_CMD_OUT_ILL_PH;
462#ifdef SCSI_SINGLE_STEP
463 start_script_cmd=(unsigned long)&script_cmd[0];
464 len_script_cmd=i*4;
465#endif
466 i=0;
467 script_data_out[i++]=swap_script(SCR_MOVE_ABS(pccb->datalen)^ SCR_DATA_OUT); /* move */
468 script_data_out[i++]=swap_script(phys_to_bus(pccb->pdata)); /* pointer to buffer */
469 script_data_out[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_STATUS)));
470 script_data_out[i++]=swap_script(phys_to_bus(&script_status[0]));
471 script_data_out[i++]=swap_script(SCR_INT);
472 script_data_out[i++]=SIR_DATA_OUT_ERR;
473
474#ifdef SCSI_SINGLE_STEP
475 start_script_data_out=(unsigned long)&script_data_out[0];
476 len_script_data_out=i*4;
477#endif
478 i=0;
479 script_data_in[i++]=swap_script(SCR_MOVE_ABS(pccb->datalen)^ SCR_DATA_IN); /* move */
480 script_data_in[i++]=swap_script(phys_to_bus(pccb->pdata)); /* pointer to buffer */
481 script_data_in[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_STATUS)));
482 script_data_in[i++]=swap_script(phys_to_bus(&script_status[0]));
483 script_data_in[i++]=swap_script(SCR_INT);
484 script_data_in[i++]=SIR_DATA_IN_ERR;
485#ifdef SCSI_SINGLE_STEP
486 start_script_data_in=(unsigned long)&script_data_in[0];
487 len_script_data_in=i*4;
488#endif
489 i=0;
490 script_msgin[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN);
491 script_msgin[i++]=swap_script(phys_to_bus(&pccb->msgin[0]));
492 script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_COMPLETE)));
493 script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
494 script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_DISCONNECT)));
495 script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
496 script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_SAVE_DP)));
497 script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
498 script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_RESTORE_DP)));
499 script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0]));
500 script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED)));
501 script_msgin[i++]=swap_script(phys_to_bus(&script_msg_ext[0]));
502 script_msgin[i++]=swap_script(SCR_INT);
503 script_msgin[i++]=SIR_MSG_RECEIVED;
504#ifdef SCSI_SINGLE_STEP
505 start_script_msgin=(unsigned long)&script_msgin[0];
506 len_script_msgin=i*4;
507#endif
508 i=0;
509 script_msg_ext[i++]=swap_script(SCR_CLR (SCR_ACK)); /* clear ACK */
510 script_msg_ext[i++]=0;
511 script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* assuming this is the msg length */
512 script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[1]));
513 script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
514 script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
515 script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
516 script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[2]));
517 script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
518 script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
519 script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
520 script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[3]));
521 script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
522 script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
523 script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
524 script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[4]));
525 script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
526 script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
527 script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
528 script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[5]));
529 script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
530 script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
531 script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
532 script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[6]));
533 script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
534 script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
535 script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */
536 script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[7]));
537 script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN)));
538 script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */
539 script_msg_ext[i++]=swap_script(SCR_INT);
540 script_msg_ext[i++]=SIR_MSG_OVER7;
541#ifdef SCSI_SINGLE_STEP
542 start_script_msg_ext=(unsigned long)&script_msg_ext[0];
543 len_script_msg_ext=i*4;
544#endif
545 i=0;
546 script_status[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_STATUS);
547 script_status[i++]=swap_script(phys_to_bus(&pccb->status));
548 script_status[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN)));
549 script_status[i++]=swap_script(phys_to_bus(&script_msgin[0]));
550 script_status[i++]=swap_script(SCR_INT);
551 script_status[i++]=SIR_STATUS_ILL_PH;
552#ifdef SCSI_SINGLE_STEP
553 start_script_status=(unsigned long)&script_status[0];
554 len_script_status=i*4;
555#endif
556 i=0;
557 script_complete[i++]=swap_script(SCR_REG_REG (SCNTL2, SCR_AND, 0x7f));
558 script_complete[i++]=0;
559 script_complete[i++]=swap_script(SCR_CLR (SCR_ACK|SCR_ATN));
560 script_complete[i++]=0;
561 script_complete[i++]=swap_script(SCR_WAIT_DISC);
562 script_complete[i++]=0;
563 script_complete[i++]=swap_script(SCR_REG_REG(GPREG, SCR_OR, 0x01));
564 script_complete[i++]=0; /* LED OFF */
565 script_complete[i++]=swap_script(SCR_INT);
566 script_complete[i++]=SIR_COMPLETE;
567#ifdef SCSI_SINGLE_STEP
568 start_script_complete=(unsigned long)&script_complete[0];
569 len_script_complete=i*4;
570#endif
571 i=0;
572 script_error[i++]=swap_script(SCR_INT); /* interrupt if error */
573 script_error[i++]=SIR_SCRIPT_ERROR;
574#ifdef SCSI_SINGLE_STEP
575 start_script_error=(unsigned long)&script_error[0];
576 len_script_error=i*4;
577#endif
578 i=0;
579 script_reselection[i++]=swap_script(SCR_CLR (SCR_TRG)); /* target status */
580 script_reselection[i++]=0;
581 script_reselection[i++]=swap_script(SCR_WAIT_RESEL);
582 script_reselection[i++]=swap_script(phys_to_bus(&script_select[0])); /* len = 4 */
583#ifdef SCSI_SINGLE_STEP
584 start_script_reselection=(unsigned long)&script_reselection[0];
585 len_script_reselection=i*4;
586#endif
587}
588
589
590
591void scsi_issue(ccb *pccb)
592{
593 int busdevfunc = pccb->priv;
594 int i;
595 unsigned short sstat;
596 int retrycnt; /* retry counter */
597 for(i=0;i<3;i++)
598 int_stat[i]=0; /* delete all int status */
599 /* struct pccb must be set-up correctly */
600 retrycnt=0;
601 PRINTF("ID %d issue cmd %02X\n",pccb->target,pccb->cmd[0]);
602 pccb->trans_bytes=0; /* no bytes transfered yet */
603 scsi_set_script(pccb); /* fill in SCRIPT */
604 scsi_int_mask=STO | UDC | MA; /* | CMP; / * Interrupts which are enabled */
605 script_int_mask=0xff; /* enable all Ints */
606 scsi_int_enable();
607 scsi_write_dsp(phys_to_bus(&script_select[0])); /* start script */
608 /* now we have to wait for IRQs */
609retry:
610 /*
611 * This version of the driver is _not_ interrupt driven,
612 * but polls the chip's interrupt registers (ISTAT, DSTAT).
613 */
614 while(int_stat[0]==0)
615 handle_scsi_int();
616
617 if(int_stat[0]==SIR_COMPLETE) {
618 if(pccb->msgin[0]==M_DISCONNECT) {
619 PRINTF("Wait for reselection\n");
620 for(i=0;i<3;i++)
621 int_stat[i]=0; /* delete all int status */
622 scsi_write_dsp(phys_to_bus(&script_reselection[0])); /* start reselection script */
623 goto retry;
624 }
625 pccb->contr_stat=SIR_COMPLETE;
626 return;
627 }
628 if((int_stat[0] & SCSI_INT_STATE)==SCSI_INT_STATE) { /* scsi interrupt */
629 sstat=(unsigned short)int_stat[0];
630 if((sstat & STO)==STO) { /* selection timeout */
631 pccb->contr_stat=SCSI_SEL_TIME_OUT;
632 scsi_write_byte(GPREG,0x01);
633 PRINTF("ID: %X Selection Timeout\n",pccb->target);
634 return;
635 }
636 if((sstat & UDC)==UDC) { /* unexpected disconnect */
637 pccb->contr_stat=SCSI_UNEXP_DIS;
638 scsi_write_byte(GPREG,0x01);
639 PRINTF("ID: %X Unexpected Disconnect\n",pccb->target);
640 return;
641 }
642 if((sstat & RSL)==RSL) { /* reselection */
643 pccb->contr_stat=SCSI_UNEXP_DIS;
644 scsi_write_byte(GPREG,0x01);
645 PRINTF("ID: %X Unexpected Disconnect\n",pccb->target);
646 return;
647 }
648 if(((sstat & MA)==MA)||((sstat & HTH)==HTH)) { /* phase missmatch */
649 if(retrycnt<SCSI_MAX_RETRY) {
650 pccb->trans_bytes=pccb->datalen -
651 ((unsigned long)scsi_read_byte(DBC) |
652 ((unsigned long)scsi_read_byte(DBC+1)<<8) |
653 ((unsigned long)scsi_read_byte(DBC+2)<<16));
654 for(i=0;i<3;i++)
655 int_stat[i]=0; /* delete all int status */
656 retrycnt++;
657 PRINTF("ID: %X Phase Missmatch Retry %d Phase %02X transfered %lx\n",
658 pccb->target,retrycnt,scsi_read_byte(SBCL),pccb->trans_bytes);
659 scsi_write_dsp(phys_to_bus(&script_cmd[4])); /* start retry script */
660 goto retry;
661 }
662 if((sstat & MA)==MA)
663 pccb->contr_stat=SCSI_MA_TIME_OUT;
664 else
665 pccb->contr_stat=SCSI_HNS_TIME_OUT;
666 PRINTF("Phase Missmatch stat %lx\n",pccb->contr_stat);
667 return;
668 } /* no phase int */
669/* if((sstat & CMP)==CMP) {
670 pccb->contr_stat=SIR_COMPLETE;
671 return;
672 }
673*/
674 PRINTF("SCSI INT %lX\n",int_stat[0]);
675 pccb->contr_stat=int_stat[0];
676 return;
677 } /* end scsi int */
678 PRINTF("SCRIPT INT %lX phase %02X\n",int_stat[0],scsi_read_byte(SBCL));
679 pccb->contr_stat=int_stat[0];
680 return;
681}
682
683int scsi_exec(ccb *pccb)
684{
685 unsigned char tmpcmd[16],tmpstat;
686 int i,retrycnt,t;
687 unsigned long transbytes,datalen;
688 unsigned char *tmpptr;
689 retrycnt=0;
690retry:
691 scsi_issue(pccb);
692 if(pccb->contr_stat!=SIR_COMPLETE)
693 return FALSE;
694 if(pccb->status==S_GOOD)
695 return TRUE;
696 if(pccb->status==S_CHECK_COND) { /* check condition */
697 for(i=0;i<16;i++)
698 tmpcmd[i]=pccb->cmd[i];
699 pccb->cmd[0]=SCSI_REQ_SENSE;
700 pccb->cmd[1]=pccb->lun<<5;
701 pccb->cmd[2]=0;
702 pccb->cmd[3]=0;
703 pccb->cmd[4]=14;
704 pccb->cmd[5]=0;
705 pccb->cmdlen=6;
706 pccb->msgout[0]=SCSI_IDENTIFY;
707 transbytes=pccb->trans_bytes;
708 tmpptr=pccb->pdata;
709 pccb->pdata=&pccb->sense_buf[0];
710 datalen=pccb->datalen;
711 pccb->datalen=14;
712 tmpstat=pccb->status;
713 scsi_issue(pccb);
714 for(i=0;i<16;i++)
715 pccb->cmd[i]=tmpcmd[i];
716 pccb->trans_bytes=transbytes;
717 pccb->pdata=tmpptr;
718 pccb->datalen=datalen;
719 pccb->status=tmpstat;
720 PRINTF("Request_sense sense key %x ASC %x ASCQ %x\n",pccb->sense_buf[2]&0x0f,
721 pccb->sense_buf[12],pccb->sense_buf[13]);
722 switch(pccb->sense_buf[2]&0xf) {
723 case SENSE_NO_SENSE:
724 case SENSE_RECOVERED_ERROR:
725 /* seems to be ok */
726 return TRUE;
727 break;
728 case SENSE_NOT_READY:
729 if((pccb->sense_buf[12]!=0x04)||(pccb->sense_buf[13]!=0x01)) {
730 /* if device is not in process of becoming ready */
731 return FALSE;
732 break;
733 } /* else fall through */
734 case SENSE_UNIT_ATTENTION:
735 if(retrycnt<SCSI_MAX_RETRY_NOT_READY) {
736 PRINTF("Target %d not ready, retry %d\n",pccb->target,retrycnt);
737 for(t=0;t<SCSI_NOT_READY_TIME_OUT;t++)
738 udelay(1000); /* 1sec wait */
739 retrycnt++;
740 goto retry;
741 }
742 PRINTF("Target %d not ready, %d retried\n",pccb->target,retrycnt);
743 return FALSE;
744 default:
745 return FALSE;
746 }
747 }
748 PRINTF("Status = %X\n",pccb->status);
749 return FALSE;
750}
751
752
753
754
755void scsi_chip_init(void)
756{
757 /* first we issue a soft reset */
758 scsi_write_byte(ISTAT,SRST);
759 udelay(1000);
760 scsi_write_byte(ISTAT,0);
761 /* setup chip */
762 scsi_write_byte(SCNTL0,0xC0); /* full arbitration no start, no message, parity disabled, master */
763 scsi_write_byte(SCNTL1,0x00);
764 scsi_write_byte(SCNTL2,0x00);
765#ifndef CFG_SCSI_SYM53C8XX_CCF /* config value for none 40 mhz clocks */
766 scsi_write_byte(SCNTL3,0x13); /* synchronous clock 40/4=10MHz, asynchronous 40MHz */
767#else
768 scsi_write_byte(SCNTL3,CFG_SCSI_SYM53C8XX_CCF); /* config value for none 40 mhz clocks */
769#endif
770 scsi_write_byte(SCID,0x47); /* ID=7, enable reselection */
771 scsi_write_byte(SXFER,0x00); /* synchronous transfer period 10MHz, asynchronous */
772 scsi_write_byte(SDID,0x00); /* targed SCSI ID = 0 */
773 scsi_int_mask=0x0000; /* no Interrupt is enabled */
774 script_int_mask=0x00;
775 scsi_int_enable();
776 scsi_write_byte(GPREG,0x01); /* GPIO0 is LED (off) */
777 scsi_write_byte(GPCNTL,0x0E); /* GPIO0 is Output */
778 scsi_write_byte(STIME0,0x08); /* handshake timer disabled, selection timeout 512msec */
779 scsi_write_byte(RESPID,0x80); /* repond only to the own ID (reselection) */
780 scsi_write_byte(STEST1,0x00); /* not isolated, SCLK is used */
781 scsi_write_byte(STEST2,0x00); /* no Lowlevel Mode? */
782 scsi_write_byte(STEST3,0x80); /* enable tolerANT */
783 scsi_write_byte(CTEST3,0x04); /* clear FIFO */
784 scsi_write_byte(CTEST4,0x00);
785 scsi_write_byte(CTEST5,0x00);
786#ifdef SCSI_SINGLE_STEP
787/* scsi_write_byte(DCNTL,IRQM | SSM); */
788 scsi_write_byte(DCNTL,IRQD | SSM);
789 scsi_write_byte(DMODE,MAN);
790#else
791/* scsi_write_byte(DCNTL,IRQM); */
792 scsi_write_byte(DCNTL,IRQD);
793 scsi_write_byte(DMODE,0x00);
794#endif
795}
796#endif /* (CONFIG_COMMANDS & CFG_CMD_SCSI) */
797
798
799#endif /* CONFIG_SCSI_SYM53C8XX */
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