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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 | ||
1df49e27 | 38 | #include <command.h> |
1df49e27 WD |
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 | ||
cb51c0bf | 52 | #if defined(CONFIG_CMD_SCSI) && defined(CONFIG_SCSI_SYM53C8XX) |
1df49e27 WD |
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 | ||
53677ef1 | 84 | static unsigned short scsi_int_mask; /* shadow register for SCSI related interrupts */ |
1df49e27 | 85 | static unsigned char script_int_mask; /* shadow register for SCRIPT related interrupts */ |
53677ef1 WD |
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 */ | |
1df49e27 WD |
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 | */ | |
53677ef1 | 120 | void scsi_print_error (ccb * pccb) |
1df49e27 WD |
121 | { |
122 | int i; | |
53677ef1 WD |
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; | |
1df49e27 | 177 | } |
53677ef1 WD |
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; | |
1df49e27 | 225 | } |
53677ef1 WD |
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; | |
1df49e27 WD |
260 | } |
261 | ||
262 | } | |
263 | ||
264 | ||
1df49e27 WD |
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 | |
53677ef1 | 336 | if((stat1 & SSI)==SSI) { |
1df49e27 WD |
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; | |
6d0f6bcf | 429 | int end = CONFIG_SYS_SCSI_SPIN_UP_TIME*1000; |
1df49e27 WD |
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 | unsigned long val; | |
457 | #ifdef SCSI_SINGLE_STEP | |
458 | unsigned char t; | |
459 | #endif | |
460 | val = start; | |
461 | out32r(scsi_mem_addr + DSP,start); | |
462 | #ifdef SCSI_SINGLE_STEP | |
463 | t=scsi_read_byte(DCNTL); | |
464 | t|=STD; | |
465 | scsi_write_byte(DCNTL,t); | |
466 | #endif | |
467 | } | |
468 | ||
469 | /* only used for debug purposes */ | |
470 | void scsi_print_script(void) | |
471 | { | |
472 | printf("script_select @ 0x%08lX\n",(unsigned long)&script_select[0]); | |
473 | printf("script_msgout @ 0x%08lX\n",(unsigned long)&script_msgout[0]); | |
474 | printf("script_msgin @ 0x%08lX\n",(unsigned long)&script_msgin[0]); | |
475 | printf("script_msgext @ 0x%08lX\n",(unsigned long)&script_msg_ext[0]); | |
476 | printf("script_cmd @ 0x%08lX\n",(unsigned long)&script_cmd[0]); | |
477 | printf("script_data_in @ 0x%08lX\n",(unsigned long)&script_data_in[0]); | |
478 | printf("script_data_out @ 0x%08lX\n",(unsigned long)&script_data_out[0]); | |
479 | printf("script_status @ 0x%08lX\n",(unsigned long)&script_status[0]); | |
480 | printf("script_complete @ 0x%08lX\n",(unsigned long)&script_complete[0]); | |
481 | printf("script_error @ 0x%08lX\n",(unsigned long)&script_error[0]); | |
482 | } | |
483 | ||
484 | ||
1df49e27 WD |
485 | void scsi_set_script(ccb *pccb) |
486 | { | |
487 | int busdevfunc = pccb->priv; | |
488 | int i; | |
489 | i=0; | |
490 | script_select[i++]=swap_script(SCR_REG_REG(GPREG, SCR_AND, 0xfe)); | |
491 | script_select[i++]=0; /* LED ON */ | |
492 | script_select[i++]=swap_script(SCR_CLR(SCR_TRG)); /* select initiator mode */ | |
493 | script_select[i++]=0; | |
494 | /* script_select[i++]=swap_script(SCR_SEL_ABS_ATN | pccb->target << 16); */ | |
495 | script_select[i++]=swap_script(SCR_SEL_ABS | pccb->target << 16); | |
496 | script_select[i++]=swap_script(phys_to_bus(&script_cmd[4])); /* error handling */ | |
497 | script_select[i++]=swap_script(SCR_JUMP); /* next section */ | |
498 | /* script_select[i++]=swap_script((unsigned long)&script_msgout[0]); */ /* message out */ | |
499 | script_select[i++]=swap_script(phys_to_bus(&script_cmd[0])); /* command out */ | |
500 | ||
501 | #ifdef SCSI_SINGLE_STEP | |
502 | start_script_select=(unsigned long)&script_select[0]; | |
503 | len_script_select=i*4; | |
504 | #endif | |
505 | ||
506 | i=0; | |
507 | script_msgout[i++]=swap_script(SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT))); | |
508 | script_msgout[i++]=SIR_SEL_ATN_NO_MSG_OUT; | |
509 | script_msgout[i++]=swap_script( SCR_MOVE_ABS(1) ^ SCR_MSG_OUT); | |
510 | script_msgout[i++]=swap_script(phys_to_bus(&pccb->msgout[0])); | |
511 | script_msgout[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_COMMAND))); /* if Command phase */ | |
512 | script_msgout[i++]=swap_script(phys_to_bus(&script_cmd[0])); /* switch to command */ | |
513 | script_msgout[i++]=swap_script(SCR_INT); /* interrupt if not */ | |
514 | script_msgout[i++]=SIR_MSG_OUT_NO_CMD; | |
515 | ||
516 | #ifdef SCSI_SINGLE_STEP | |
517 | start_script_msgout=(unsigned long)&script_msgout[0]; | |
518 | len_script_msgout=i*4; | |
519 | #endif | |
520 | i=0; | |
521 | script_cmd[i++]=swap_script(SCR_MOVE_ABS(pccb->cmdlen) ^ SCR_COMMAND); | |
522 | script_cmd[i++]=swap_script(phys_to_bus(&pccb->cmd[0])); | |
523 | script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN))); /* message in ? */ | |
524 | script_cmd[i++]=swap_script(phys_to_bus(&script_msgin[0])); | |
525 | script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_DATA_OUT))); /* data out ? */ | |
526 | script_cmd[i++]=swap_script(phys_to_bus(&script_data_out[0])); | |
527 | script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_DATA_IN))); /* data in ? */ | |
528 | script_cmd[i++]=swap_script(phys_to_bus(&script_data_in[0])); | |
529 | script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_STATUS))); /* status ? */ | |
530 | script_cmd[i++]=swap_script(phys_to_bus(&script_status[0])); | |
531 | script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND))); /* command ? */ | |
532 | script_cmd[i++]=swap_script(phys_to_bus(&script_cmd[0])); | |
533 | script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT))); /* message out ? */ | |
534 | script_cmd[i++]=swap_script(phys_to_bus(&script_msgout[0])); | |
535 | script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_MSG_IN))); /* just for error handling message in ? */ | |
536 | script_cmd[i++]=swap_script(phys_to_bus(&script_msgin[0])); | |
537 | script_cmd[i++]=swap_script(SCR_INT); /* interrupt if not */ | |
538 | script_cmd[i++]=SIR_CMD_OUT_ILL_PH; | |
539 | #ifdef SCSI_SINGLE_STEP | |
540 | start_script_cmd=(unsigned long)&script_cmd[0]; | |
541 | len_script_cmd=i*4; | |
542 | #endif | |
543 | i=0; | |
544 | script_data_out[i++]=swap_script(SCR_MOVE_ABS(pccb->datalen)^ SCR_DATA_OUT); /* move */ | |
545 | script_data_out[i++]=swap_script(phys_to_bus(pccb->pdata)); /* pointer to buffer */ | |
546 | script_data_out[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_STATUS))); | |
547 | script_data_out[i++]=swap_script(phys_to_bus(&script_status[0])); | |
548 | script_data_out[i++]=swap_script(SCR_INT); | |
549 | script_data_out[i++]=SIR_DATA_OUT_ERR; | |
550 | ||
551 | #ifdef SCSI_SINGLE_STEP | |
552 | start_script_data_out=(unsigned long)&script_data_out[0]; | |
553 | len_script_data_out=i*4; | |
554 | #endif | |
555 | i=0; | |
556 | script_data_in[i++]=swap_script(SCR_MOVE_ABS(pccb->datalen)^ SCR_DATA_IN); /* move */ | |
557 | script_data_in[i++]=swap_script(phys_to_bus(pccb->pdata)); /* pointer to buffer */ | |
558 | script_data_in[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_STATUS))); | |
559 | script_data_in[i++]=swap_script(phys_to_bus(&script_status[0])); | |
560 | script_data_in[i++]=swap_script(SCR_INT); | |
561 | script_data_in[i++]=SIR_DATA_IN_ERR; | |
562 | #ifdef SCSI_SINGLE_STEP | |
563 | start_script_data_in=(unsigned long)&script_data_in[0]; | |
564 | len_script_data_in=i*4; | |
565 | #endif | |
566 | i=0; | |
567 | script_msgin[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); | |
568 | script_msgin[i++]=swap_script(phys_to_bus(&pccb->msgin[0])); | |
569 | script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_COMPLETE))); | |
570 | script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0])); | |
571 | script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_DISCONNECT))); | |
572 | script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0])); | |
573 | script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_SAVE_DP))); | |
574 | script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0])); | |
575 | script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_RESTORE_DP))); | |
576 | script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0])); | |
577 | script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED))); | |
578 | script_msgin[i++]=swap_script(phys_to_bus(&script_msg_ext[0])); | |
579 | script_msgin[i++]=swap_script(SCR_INT); | |
580 | script_msgin[i++]=SIR_MSG_RECEIVED; | |
581 | #ifdef SCSI_SINGLE_STEP | |
582 | start_script_msgin=(unsigned long)&script_msgin[0]; | |
583 | len_script_msgin=i*4; | |
584 | #endif | |
585 | i=0; | |
586 | script_msg_ext[i++]=swap_script(SCR_CLR (SCR_ACK)); /* clear ACK */ | |
587 | script_msg_ext[i++]=0; | |
588 | script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* assuming this is the msg length */ | |
589 | script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[1])); | |
590 | script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN))); | |
591 | script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */ | |
592 | script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */ | |
593 | script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[2])); | |
594 | script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN))); | |
595 | script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */ | |
596 | script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */ | |
597 | script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[3])); | |
598 | script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN))); | |
599 | script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */ | |
600 | script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */ | |
601 | script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[4])); | |
602 | script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN))); | |
603 | script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */ | |
604 | script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */ | |
605 | script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[5])); | |
606 | script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN))); | |
607 | script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */ | |
608 | script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */ | |
609 | script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[6])); | |
610 | script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN))); | |
611 | script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */ | |
612 | script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */ | |
613 | script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[7])); | |
614 | script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN))); | |
615 | script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */ | |
616 | script_msg_ext[i++]=swap_script(SCR_INT); | |
617 | script_msg_ext[i++]=SIR_MSG_OVER7; | |
618 | #ifdef SCSI_SINGLE_STEP | |
619 | start_script_msg_ext=(unsigned long)&script_msg_ext[0]; | |
620 | len_script_msg_ext=i*4; | |
621 | #endif | |
622 | i=0; | |
623 | script_status[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_STATUS); | |
624 | script_status[i++]=swap_script(phys_to_bus(&pccb->status)); | |
625 | script_status[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN))); | |
626 | script_status[i++]=swap_script(phys_to_bus(&script_msgin[0])); | |
627 | script_status[i++]=swap_script(SCR_INT); | |
628 | script_status[i++]=SIR_STATUS_ILL_PH; | |
629 | #ifdef SCSI_SINGLE_STEP | |
630 | start_script_status=(unsigned long)&script_status[0]; | |
631 | len_script_status=i*4; | |
632 | #endif | |
633 | i=0; | |
634 | script_complete[i++]=swap_script(SCR_REG_REG (SCNTL2, SCR_AND, 0x7f)); | |
635 | script_complete[i++]=0; | |
636 | script_complete[i++]=swap_script(SCR_CLR (SCR_ACK|SCR_ATN)); | |
637 | script_complete[i++]=0; | |
638 | script_complete[i++]=swap_script(SCR_WAIT_DISC); | |
639 | script_complete[i++]=0; | |
640 | script_complete[i++]=swap_script(SCR_REG_REG(GPREG, SCR_OR, 0x01)); | |
641 | script_complete[i++]=0; /* LED OFF */ | |
642 | script_complete[i++]=swap_script(SCR_INT); | |
643 | script_complete[i++]=SIR_COMPLETE; | |
644 | #ifdef SCSI_SINGLE_STEP | |
645 | start_script_complete=(unsigned long)&script_complete[0]; | |
646 | len_script_complete=i*4; | |
647 | #endif | |
648 | i=0; | |
649 | script_error[i++]=swap_script(SCR_INT); /* interrupt if error */ | |
650 | script_error[i++]=SIR_SCRIPT_ERROR; | |
651 | #ifdef SCSI_SINGLE_STEP | |
652 | start_script_error=(unsigned long)&script_error[0]; | |
653 | len_script_error=i*4; | |
654 | #endif | |
655 | i=0; | |
656 | script_reselection[i++]=swap_script(SCR_CLR (SCR_TRG)); /* target status */ | |
657 | script_reselection[i++]=0; | |
658 | script_reselection[i++]=swap_script(SCR_WAIT_RESEL); | |
659 | script_reselection[i++]=swap_script(phys_to_bus(&script_select[0])); /* len = 4 */ | |
660 | #ifdef SCSI_SINGLE_STEP | |
661 | start_script_reselection=(unsigned long)&script_reselection[0]; | |
662 | len_script_reselection=i*4; | |
663 | #endif | |
664 | } | |
665 | ||
666 | ||
1df49e27 WD |
667 | void scsi_issue(ccb *pccb) |
668 | { | |
669 | int busdevfunc = pccb->priv; | |
670 | int i; | |
671 | unsigned short sstat; | |
53677ef1 | 672 | int retrycnt; /* retry counter */ |
1df49e27 WD |
673 | for(i=0;i<3;i++) |
674 | int_stat[i]=0; /* delete all int status */ | |
675 | /* struct pccb must be set-up correctly */ | |
676 | retrycnt=0; | |
677 | PRINTF("ID %d issue cmd %02X\n",pccb->target,pccb->cmd[0]); | |
678 | pccb->trans_bytes=0; /* no bytes transfered yet */ | |
679 | scsi_set_script(pccb); /* fill in SCRIPT */ | |
680 | scsi_int_mask=STO | UDC | MA; /* | CMP; / * Interrupts which are enabled */ | |
681 | script_int_mask=0xff; /* enable all Ints */ | |
682 | scsi_int_enable(); | |
683 | scsi_write_dsp(phys_to_bus(&script_select[0])); /* start script */ | |
684 | /* now we have to wait for IRQs */ | |
685 | retry: | |
686 | /* | |
687 | * This version of the driver is _not_ interrupt driven, | |
688 | * but polls the chip's interrupt registers (ISTAT, DSTAT). | |
689 | */ | |
690 | while(int_stat[0]==0) | |
691 | handle_scsi_int(); | |
692 | ||
693 | if(int_stat[0]==SIR_COMPLETE) { | |
694 | if(pccb->msgin[0]==M_DISCONNECT) { | |
695 | PRINTF("Wait for reselection\n"); | |
696 | for(i=0;i<3;i++) | |
697 | int_stat[i]=0; /* delete all int status */ | |
698 | scsi_write_dsp(phys_to_bus(&script_reselection[0])); /* start reselection script */ | |
699 | goto retry; | |
700 | } | |
701 | pccb->contr_stat=SIR_COMPLETE; | |
702 | return; | |
703 | } | |
704 | if((int_stat[0] & SCSI_INT_STATE)==SCSI_INT_STATE) { /* scsi interrupt */ | |
705 | sstat=(unsigned short)int_stat[0]; | |
706 | if((sstat & STO)==STO) { /* selection timeout */ | |
707 | pccb->contr_stat=SCSI_SEL_TIME_OUT; | |
708 | scsi_write_byte(GPREG,0x01); | |
709 | PRINTF("ID: %X Selection Timeout\n",pccb->target); | |
710 | return; | |
711 | } | |
712 | if((sstat & UDC)==UDC) { /* unexpected disconnect */ | |
713 | pccb->contr_stat=SCSI_UNEXP_DIS; | |
714 | scsi_write_byte(GPREG,0x01); | |
715 | PRINTF("ID: %X Unexpected Disconnect\n",pccb->target); | |
716 | return; | |
717 | } | |
718 | if((sstat & RSL)==RSL) { /* reselection */ | |
719 | pccb->contr_stat=SCSI_UNEXP_DIS; | |
720 | scsi_write_byte(GPREG,0x01); | |
721 | PRINTF("ID: %X Unexpected Disconnect\n",pccb->target); | |
722 | return; | |
723 | } | |
724 | if(((sstat & MA)==MA)||((sstat & HTH)==HTH)) { /* phase missmatch */ | |
725 | if(retrycnt<SCSI_MAX_RETRY) { | |
726 | pccb->trans_bytes=pccb->datalen - | |
727 | ((unsigned long)scsi_read_byte(DBC) | | |
728 | ((unsigned long)scsi_read_byte(DBC+1)<<8) | | |
729 | ((unsigned long)scsi_read_byte(DBC+2)<<16)); | |
730 | for(i=0;i<3;i++) | |
731 | int_stat[i]=0; /* delete all int status */ | |
732 | retrycnt++; | |
733 | PRINTF("ID: %X Phase Missmatch Retry %d Phase %02X transfered %lx\n", | |
734 | pccb->target,retrycnt,scsi_read_byte(SBCL),pccb->trans_bytes); | |
735 | scsi_write_dsp(phys_to_bus(&script_cmd[4])); /* start retry script */ | |
736 | goto retry; | |
737 | } | |
738 | if((sstat & MA)==MA) | |
739 | pccb->contr_stat=SCSI_MA_TIME_OUT; | |
740 | else | |
741 | pccb->contr_stat=SCSI_HNS_TIME_OUT; | |
742 | PRINTF("Phase Missmatch stat %lx\n",pccb->contr_stat); | |
743 | return; | |
744 | } /* no phase int */ | |
745 | /* if((sstat & CMP)==CMP) { | |
746 | pccb->contr_stat=SIR_COMPLETE; | |
747 | return; | |
748 | } | |
749 | */ | |
750 | PRINTF("SCSI INT %lX\n",int_stat[0]); | |
751 | pccb->contr_stat=int_stat[0]; | |
752 | return; | |
753 | } /* end scsi int */ | |
754 | PRINTF("SCRIPT INT %lX phase %02X\n",int_stat[0],scsi_read_byte(SBCL)); | |
755 | pccb->contr_stat=int_stat[0]; | |
756 | return; | |
757 | } | |
758 | ||
759 | int scsi_exec(ccb *pccb) | |
760 | { | |
761 | unsigned char tmpcmd[16],tmpstat; | |
762 | int i,retrycnt,t; | |
763 | unsigned long transbytes,datalen; | |
764 | unsigned char *tmpptr; | |
765 | retrycnt=0; | |
766 | retry: | |
767 | scsi_issue(pccb); | |
768 | if(pccb->contr_stat!=SIR_COMPLETE) | |
769 | return FALSE; | |
770 | if(pccb->status==S_GOOD) | |
771 | return TRUE; | |
772 | if(pccb->status==S_CHECK_COND) { /* check condition */ | |
773 | for(i=0;i<16;i++) | |
774 | tmpcmd[i]=pccb->cmd[i]; | |
775 | pccb->cmd[0]=SCSI_REQ_SENSE; | |
776 | pccb->cmd[1]=pccb->lun<<5; | |
777 | pccb->cmd[2]=0; | |
778 | pccb->cmd[3]=0; | |
779 | pccb->cmd[4]=14; | |
780 | pccb->cmd[5]=0; | |
781 | pccb->cmdlen=6; | |
782 | pccb->msgout[0]=SCSI_IDENTIFY; | |
783 | transbytes=pccb->trans_bytes; | |
784 | tmpptr=pccb->pdata; | |
d0ff51ba | 785 | pccb->pdata = &pccb->sense_buf[0]; |
1df49e27 WD |
786 | datalen=pccb->datalen; |
787 | pccb->datalen=14; | |
788 | tmpstat=pccb->status; | |
789 | scsi_issue(pccb); | |
790 | for(i=0;i<16;i++) | |
791 | pccb->cmd[i]=tmpcmd[i]; | |
792 | pccb->trans_bytes=transbytes; | |
793 | pccb->pdata=tmpptr; | |
794 | pccb->datalen=datalen; | |
795 | pccb->status=tmpstat; | |
796 | PRINTF("Request_sense sense key %x ASC %x ASCQ %x\n",pccb->sense_buf[2]&0x0f, | |
797 | pccb->sense_buf[12],pccb->sense_buf[13]); | |
798 | switch(pccb->sense_buf[2]&0xf) { | |
799 | case SENSE_NO_SENSE: | |
800 | case SENSE_RECOVERED_ERROR: | |
801 | /* seems to be ok */ | |
802 | return TRUE; | |
803 | break; | |
804 | case SENSE_NOT_READY: | |
805 | if((pccb->sense_buf[12]!=0x04)||(pccb->sense_buf[13]!=0x01)) { | |
806 | /* if device is not in process of becoming ready */ | |
807 | return FALSE; | |
808 | break; | |
809 | } /* else fall through */ | |
810 | case SENSE_UNIT_ATTENTION: | |
811 | if(retrycnt<SCSI_MAX_RETRY_NOT_READY) { | |
812 | PRINTF("Target %d not ready, retry %d\n",pccb->target,retrycnt); | |
813 | for(t=0;t<SCSI_NOT_READY_TIME_OUT;t++) | |
814 | udelay(1000); /* 1sec wait */ | |
815 | retrycnt++; | |
816 | goto retry; | |
817 | } | |
818 | PRINTF("Target %d not ready, %d retried\n",pccb->target,retrycnt); | |
819 | return FALSE; | |
820 | default: | |
821 | return FALSE; | |
822 | } | |
823 | } | |
824 | PRINTF("Status = %X\n",pccb->status); | |
825 | return FALSE; | |
826 | } | |
827 | ||
828 | ||
1df49e27 WD |
829 | void scsi_chip_init(void) |
830 | { | |
831 | /* first we issue a soft reset */ | |
832 | scsi_write_byte(ISTAT,SRST); | |
833 | udelay(1000); | |
834 | scsi_write_byte(ISTAT,0); | |
835 | /* setup chip */ | |
836 | scsi_write_byte(SCNTL0,0xC0); /* full arbitration no start, no message, parity disabled, master */ | |
837 | scsi_write_byte(SCNTL1,0x00); | |
838 | scsi_write_byte(SCNTL2,0x00); | |
8ed44d91 | 839 | #ifndef CONFIG_SYS_SCSI_SYM53C8XX_CCF /* config value for none 40 MHz clocks */ |
1df49e27 WD |
840 | scsi_write_byte(SCNTL3,0x13); /* synchronous clock 40/4=10MHz, asynchronous 40MHz */ |
841 | #else | |
8ed44d91 | 842 | scsi_write_byte(SCNTL3,CONFIG_SYS_SCSI_SYM53C8XX_CCF); /* config value for none 40 MHz clocks */ |
1df49e27 WD |
843 | #endif |
844 | scsi_write_byte(SCID,0x47); /* ID=7, enable reselection */ | |
845 | scsi_write_byte(SXFER,0x00); /* synchronous transfer period 10MHz, asynchronous */ | |
846 | scsi_write_byte(SDID,0x00); /* targed SCSI ID = 0 */ | |
847 | scsi_int_mask=0x0000; /* no Interrupt is enabled */ | |
848 | script_int_mask=0x00; | |
849 | scsi_int_enable(); | |
850 | scsi_write_byte(GPREG,0x01); /* GPIO0 is LED (off) */ | |
851 | scsi_write_byte(GPCNTL,0x0E); /* GPIO0 is Output */ | |
852 | scsi_write_byte(STIME0,0x08); /* handshake timer disabled, selection timeout 512msec */ | |
853 | scsi_write_byte(RESPID,0x80); /* repond only to the own ID (reselection) */ | |
854 | scsi_write_byte(STEST1,0x00); /* not isolated, SCLK is used */ | |
855 | scsi_write_byte(STEST2,0x00); /* no Lowlevel Mode? */ | |
856 | scsi_write_byte(STEST3,0x80); /* enable tolerANT */ | |
857 | scsi_write_byte(CTEST3,0x04); /* clear FIFO */ | |
858 | scsi_write_byte(CTEST4,0x00); | |
859 | scsi_write_byte(CTEST5,0x00); | |
860 | #ifdef SCSI_SINGLE_STEP | |
861 | /* scsi_write_byte(DCNTL,IRQM | SSM); */ | |
862 | scsi_write_byte(DCNTL,IRQD | SSM); | |
863 | scsi_write_byte(DMODE,MAN); | |
864 | #else | |
865 | /* scsi_write_byte(DCNTL,IRQM); */ | |
866 | scsi_write_byte(DCNTL,IRQD); | |
867 | scsi_write_byte(DMODE,0x00); | |
868 | #endif | |
869 | } | |
cb51c0bf | 870 | #endif |