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1df49e27 WD |
1 | /* |
2 | * (C) Copyright 2001 | |
3 | * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch. | |
4 | * | |
1a459660 | 5 | * SPDX-License-Identifier: GPL-2.0+ |
1df49e27 WD |
6 | * partly derived from |
7 | * linux/drivers/scsi/sym53c8xx.c | |
8 | * | |
9 | */ | |
10 | ||
11 | /* | |
12 | * SCSI support based on the chip sym53C810. | |
13 | * | |
14 | * 09-19-2001 Andreas Heppel, Sysgo RTS GmbH <aheppel@sysgo.de> | |
15 | * The local version of this driver for the BAB750 board does not | |
16 | * use interrupts but polls the chip instead (see the call of | |
17 | * 'handle_scsi_int()' in 'scsi_issue()'. | |
18 | */ | |
19 | ||
20 | #include <common.h> | |
21 | ||
1df49e27 | 22 | #include <command.h> |
1df49e27 WD |
23 | #include <pci.h> |
24 | #include <asm/processor.h> | |
25 | #include <sym53c8xx.h> | |
26 | #include <scsi.h> | |
27 | ||
28 | #undef SYM53C8XX_DEBUG | |
29 | ||
30 | #ifdef SYM53C8XX_DEBUG | |
31 | #define PRINTF(fmt,args...) printf (fmt ,##args) | |
32 | #else | |
33 | #define PRINTF(fmt,args...) | |
34 | #endif | |
35 | ||
cb51c0bf | 36 | #if defined(CONFIG_CMD_SCSI) && defined(CONFIG_SCSI_SYM53C8XX) |
1df49e27 WD |
37 | |
38 | #undef SCSI_SINGLE_STEP | |
39 | /* | |
40 | * Single Step is only used for debug purposes | |
41 | */ | |
42 | #ifdef SCSI_SINGLE_STEP | |
43 | static unsigned long start_script_select; | |
44 | static unsigned long start_script_msgout; | |
45 | static unsigned long start_script_msgin; | |
46 | static unsigned long start_script_msg_ext; | |
47 | static unsigned long start_script_cmd; | |
48 | static unsigned long start_script_data_in; | |
49 | static unsigned long start_script_data_out; | |
50 | static unsigned long start_script_status; | |
51 | static unsigned long start_script_complete; | |
52 | static unsigned long start_script_error; | |
53 | static unsigned long start_script_reselection; | |
54 | static unsigned int len_script_select; | |
55 | static unsigned int len_script_msgout; | |
56 | static unsigned int len_script_msgin; | |
57 | static unsigned int len_script_msg_ext; | |
58 | static unsigned int len_script_cmd; | |
59 | static unsigned int len_script_data_in; | |
60 | static unsigned int len_script_data_out; | |
61 | static unsigned int len_script_status; | |
62 | static unsigned int len_script_complete; | |
63 | static unsigned int len_script_error; | |
64 | static unsigned int len_script_reselection; | |
65 | #endif | |
66 | ||
67 | ||
53677ef1 | 68 | static unsigned short scsi_int_mask; /* shadow register for SCSI related interrupts */ |
1df49e27 | 69 | static unsigned char script_int_mask; /* shadow register for SCRIPT related interrupts */ |
53677ef1 WD |
70 | static unsigned long script_select[8]; /* script for selection */ |
71 | static unsigned long script_msgout[8]; /* script for message out phase (NOT USED) */ | |
72 | static unsigned long script_msgin[14]; /* script for message in phase */ | |
1df49e27 WD |
73 | static unsigned long script_msg_ext[32]; /* script for message in phase when more than 1 byte message */ |
74 | static unsigned long script_cmd[18]; /* script for command phase */ | |
75 | static unsigned long script_data_in[8]; /* script for data in phase */ | |
76 | static unsigned long script_data_out[8]; /* script for data out phase */ | |
77 | static unsigned long script_status[6]; /* script for status phase */ | |
78 | static unsigned long script_complete[10]; /* script for complete */ | |
79 | static unsigned long script_reselection[4]; /* script for reselection (NOT USED) */ | |
80 | static unsigned long script_error[2]; /* script for error handling */ | |
81 | ||
82 | static unsigned long int_stat[3]; /* interrupt status */ | |
83 | static unsigned long scsi_mem_addr; /* base memory address =SCSI_MEM_ADDRESS; */ | |
84 | ||
85 | #define bus_to_phys(a) pci_mem_to_phys(busdevfunc, (unsigned long) (a)) | |
86 | #define phys_to_bus(a) pci_phys_to_mem(busdevfunc, (unsigned long) (a)) | |
87 | ||
88 | #define SCSI_MAX_RETRY 3 /* number of retries in scsi_issue() */ | |
89 | ||
90 | #define SCSI_MAX_RETRY_NOT_READY 10 /* number of retries when device is not ready */ | |
91 | #define SCSI_NOT_READY_TIME_OUT 500 /* timeout per retry when not ready */ | |
92 | ||
93 | /********************************************************************************* | |
94 | * forward declerations | |
95 | */ | |
96 | ||
97 | void scsi_chip_init(void); | |
98 | void handle_scsi_int(void); | |
99 | ||
100 | ||
101 | /******************************************************************************** | |
102 | * reports SCSI errors to the user | |
103 | */ | |
53677ef1 | 104 | void scsi_print_error (ccb * pccb) |
1df49e27 WD |
105 | { |
106 | int i; | |
53677ef1 WD |
107 | |
108 | printf ("SCSI Error: Target %d LUN %d Command %02X\n", pccb->target, | |
109 | pccb->lun, pccb->cmd[0]); | |
110 | printf (" CCB: "); | |
111 | for (i = 0; i < pccb->cmdlen; i++) | |
112 | printf ("%02X ", pccb->cmd[i]); | |
113 | printf ("(len=%d)\n", pccb->cmdlen); | |
114 | printf (" Cntrl: "); | |
115 | switch (pccb->contr_stat) { | |
116 | case SIR_COMPLETE: | |
117 | printf ("Complete (no Error)\n"); | |
118 | break; | |
119 | case SIR_SEL_ATN_NO_MSG_OUT: | |
120 | printf ("Selected with ATN no MSG out phase\n"); | |
121 | break; | |
122 | case SIR_CMD_OUT_ILL_PH: | |
123 | printf ("Command out illegal phase\n"); | |
124 | break; | |
125 | case SIR_MSG_RECEIVED: | |
126 | printf ("MSG received Error\n"); | |
127 | break; | |
128 | case SIR_DATA_IN_ERR: | |
129 | printf ("Data in Error\n"); | |
130 | break; | |
131 | case SIR_DATA_OUT_ERR: | |
132 | printf ("Data out Error\n"); | |
133 | break; | |
134 | case SIR_SCRIPT_ERROR: | |
135 | printf ("Script Error\n"); | |
136 | break; | |
137 | case SIR_MSG_OUT_NO_CMD: | |
138 | printf ("MSG out no Command phase\n"); | |
139 | break; | |
140 | case SIR_MSG_OVER7: | |
141 | printf ("MSG in over 7 bytes\n"); | |
142 | break; | |
143 | case INT_ON_FY: | |
144 | printf ("Interrupt on fly\n"); | |
145 | break; | |
146 | case SCSI_SEL_TIME_OUT: | |
147 | printf ("SCSI Selection Timeout\n"); | |
148 | break; | |
149 | case SCSI_HNS_TIME_OUT: | |
150 | printf ("SCSI Handshake Timeout\n"); | |
151 | break; | |
152 | case SCSI_MA_TIME_OUT: | |
153 | printf ("SCSI Phase Error\n"); | |
154 | break; | |
155 | case SCSI_UNEXP_DIS: | |
156 | printf ("SCSI unexpected disconnect\n"); | |
157 | break; | |
158 | default: | |
159 | printf ("unknown status %lx\n", pccb->contr_stat); | |
160 | break; | |
1df49e27 | 161 | } |
53677ef1 WD |
162 | printf (" Sense: SK %x (", pccb->sense_buf[2] & 0x0f); |
163 | switch (pccb->sense_buf[2] & 0xf) { | |
164 | case SENSE_NO_SENSE: | |
165 | printf ("No Sense)"); | |
166 | break; | |
167 | case SENSE_RECOVERED_ERROR: | |
168 | printf ("Recovered Error)"); | |
169 | break; | |
170 | case SENSE_NOT_READY: | |
171 | printf ("Not Ready)"); | |
172 | break; | |
173 | case SENSE_MEDIUM_ERROR: | |
174 | printf ("Medium Error)"); | |
175 | break; | |
176 | case SENSE_HARDWARE_ERROR: | |
177 | printf ("Hardware Error)"); | |
178 | break; | |
179 | case SENSE_ILLEGAL_REQUEST: | |
180 | printf ("Illegal request)"); | |
181 | break; | |
182 | case SENSE_UNIT_ATTENTION: | |
183 | printf ("Unit Attention)"); | |
184 | break; | |
185 | case SENSE_DATA_PROTECT: | |
186 | printf ("Data Protect)"); | |
187 | break; | |
188 | case SENSE_BLANK_CHECK: | |
189 | printf ("Blank check)"); | |
190 | break; | |
191 | case SENSE_VENDOR_SPECIFIC: | |
192 | printf ("Vendor specific)"); | |
193 | break; | |
194 | case SENSE_COPY_ABORTED: | |
195 | printf ("Copy aborted)"); | |
196 | break; | |
197 | case SENSE_ABORTED_COMMAND: | |
198 | printf ("Aborted Command)"); | |
199 | break; | |
200 | case SENSE_VOLUME_OVERFLOW: | |
201 | printf ("Volume overflow)"); | |
202 | break; | |
203 | case SENSE_MISCOMPARE: | |
204 | printf ("Misscompare\n"); | |
205 | break; | |
206 | default: | |
207 | printf ("Illegal Sensecode\n"); | |
208 | break; | |
1df49e27 | 209 | } |
53677ef1 WD |
210 | printf (" ASC %x ASCQ %x\n", pccb->sense_buf[12], |
211 | pccb->sense_buf[13]); | |
212 | printf (" Status: "); | |
213 | switch (pccb->status) { | |
214 | case S_GOOD: | |
215 | printf ("Good\n"); | |
216 | break; | |
217 | case S_CHECK_COND: | |
218 | printf ("Check condition\n"); | |
219 | break; | |
220 | case S_COND_MET: | |
221 | printf ("Condition Met\n"); | |
222 | break; | |
223 | case S_BUSY: | |
224 | printf ("Busy\n"); | |
225 | break; | |
226 | case S_INT: | |
227 | printf ("Intermediate\n"); | |
228 | break; | |
229 | case S_INT_COND_MET: | |
230 | printf ("Intermediate condition met\n"); | |
231 | break; | |
232 | case S_CONFLICT: | |
233 | printf ("Reservation conflict\n"); | |
234 | break; | |
235 | case S_TERMINATED: | |
236 | printf ("Command terminated\n"); | |
237 | break; | |
238 | case S_QUEUE_FULL: | |
239 | printf ("Task set full\n"); | |
240 | break; | |
241 | default: | |
242 | printf ("unknown: %02X\n", pccb->status); | |
243 | break; | |
1df49e27 WD |
244 | } |
245 | ||
246 | } | |
247 | ||
248 | ||
1df49e27 WD |
249 | /****************************************************************************** |
250 | * sets-up the SCSI controller | |
251 | * the base memory address is retrived via the pci_read_config_dword | |
252 | */ | |
253 | void scsi_low_level_init(int busdevfunc) | |
254 | { | |
255 | unsigned int cmd; | |
256 | unsigned int addr; | |
257 | unsigned char vec; | |
258 | ||
259 | pci_read_config_byte(busdevfunc, PCI_INTERRUPT_LINE, &vec); | |
260 | pci_read_config_dword(busdevfunc, PCI_BASE_ADDRESS_1, &addr); | |
261 | ||
262 | addr = bus_to_phys(addr & ~0xf); | |
263 | ||
264 | /* | |
265 | * Enable bus mastering in case this has not been done, yet. | |
266 | */ | |
267 | pci_read_config_dword(busdevfunc, PCI_COMMAND, &cmd); | |
268 | cmd |= PCI_COMMAND_MASTER; | |
269 | pci_write_config_dword(busdevfunc, PCI_COMMAND, cmd); | |
270 | ||
271 | scsi_mem_addr = addr; | |
272 | ||
273 | scsi_chip_init(); | |
274 | scsi_bus_reset(); | |
275 | } | |
276 | ||
277 | ||
278 | /************************************************************************************ | |
279 | * Low level Part of SCSI Driver | |
280 | */ | |
281 | ||
282 | /* | |
283 | * big-endian -> little endian conversion for the script | |
284 | */ | |
285 | unsigned long swap_script(unsigned long val) | |
286 | { | |
287 | unsigned long tmp; | |
288 | tmp = ((val>>24)&0xff) | ((val>>8)&0xff00) | ((val<<8)&0xff0000) | ((val<<24)&0xff000000); | |
289 | return tmp; | |
290 | } | |
291 | ||
292 | ||
293 | void scsi_write_byte(ulong offset,unsigned char val) | |
294 | { | |
295 | out8(scsi_mem_addr+offset,val); | |
296 | } | |
297 | ||
298 | ||
299 | unsigned char scsi_read_byte(ulong offset) | |
300 | { | |
301 | return(in8(scsi_mem_addr+offset)); | |
302 | } | |
303 | ||
304 | ||
305 | /******************************************************************************** | |
306 | * interrupt handler | |
307 | */ | |
308 | void handle_scsi_int(void) | |
309 | { | |
310 | unsigned char stat,stat1,stat2; | |
311 | unsigned short sstat; | |
312 | int i; | |
313 | #ifdef SCSI_SINGLE_STEP | |
314 | unsigned long tt; | |
315 | #endif | |
316 | stat=scsi_read_byte(ISTAT); | |
317 | if((stat & DIP)==DIP) { /* DMA Interrupt pending */ | |
318 | stat1=scsi_read_byte(DSTAT); | |
319 | #ifdef SCSI_SINGLE_STEP | |
53677ef1 | 320 | if((stat1 & SSI)==SSI) { |
1df49e27 WD |
321 | tt=in32r(scsi_mem_addr+DSP); |
322 | if(((tt)>=start_script_select) && ((tt)<start_script_select+len_script_select)) { | |
323 | printf("select %d\n",(tt-start_script_select)>>2); | |
324 | goto end_single; | |
325 | } | |
326 | if(((tt)>=start_script_msgout) && ((tt)<start_script_msgout+len_script_msgout)) { | |
327 | printf("msgout %d\n",(tt-start_script_msgout)>>2); | |
328 | goto end_single; | |
329 | } | |
330 | if(((tt)>=start_script_msgin) && ((tt)<start_script_msgin+len_script_msgin)) { | |
331 | printf("msgin %d\n",(tt-start_script_msgin)>>2); | |
332 | goto end_single; | |
333 | } | |
334 | if(((tt)>=start_script_msg_ext) && ((tt)<start_script_msg_ext+len_script_msg_ext)) { | |
335 | printf("msgin_ext %d\n",(tt-start_script_msg_ext)>>2); | |
336 | goto end_single; | |
337 | } | |
338 | if(((tt)>=start_script_cmd) && ((tt)<start_script_cmd+len_script_cmd)) { | |
339 | printf("cmd %d\n",(tt-start_script_cmd)>>2); | |
340 | goto end_single; | |
341 | } | |
342 | if(((tt)>=start_script_data_in) && ((tt)<start_script_data_in+len_script_data_in)) { | |
343 | printf("data_in %d\n",(tt-start_script_data_in)>>2); | |
344 | goto end_single; | |
345 | } | |
346 | if(((tt)>=start_script_data_out) && ((tt)<start_script_data_out+len_script_data_out)) { | |
347 | printf("data_out %d\n",(tt-start_script_data_out)>>2); | |
348 | goto end_single; | |
349 | } | |
350 | if(((tt)>=start_script_status) && ((tt)<start_script_status+len_script_status)) { | |
351 | printf("status %d\n",(tt-start_script_status)>>2); | |
352 | goto end_single; | |
353 | } | |
354 | if(((tt)>=start_script_complete) && ((tt)<start_script_complete+len_script_complete)) { | |
355 | printf("complete %d\n",(tt-start_script_complete)>>2); | |
356 | goto end_single; | |
357 | } | |
358 | if(((tt)>=start_script_error) && ((tt)<start_script_error+len_script_error)) { | |
359 | printf("error %d\n",(tt-start_script_error)>>2); | |
360 | goto end_single; | |
361 | } | |
362 | if(((tt)>=start_script_reselection) && ((tt)<start_script_reselection+len_script_reselection)) { | |
363 | printf("reselection %d\n",(tt-start_script_reselection)>>2); | |
364 | goto end_single; | |
365 | } | |
366 | printf("sc: %lx\n",tt); | |
367 | end_single: | |
368 | stat2=scsi_read_byte(DCNTL); | |
369 | stat2|=STD; | |
370 | scsi_write_byte(DCNTL,stat2); | |
371 | } | |
372 | #endif | |
373 | if((stat1 & SIR)==SIR) /* script interrupt */ | |
374 | { | |
375 | int_stat[0]=in32(scsi_mem_addr+DSPS); | |
376 | } | |
377 | if((stat1 & DFE)==0) { /* fifo not epmty */ | |
378 | scsi_write_byte(CTEST3,CLF); /* Clear DMA FIFO */ | |
379 | stat2=scsi_read_byte(STEST3); | |
380 | scsi_write_byte(STEST3,(stat2 | CSF)); /* Clear SCSI FIFO */ | |
381 | } | |
382 | } | |
383 | if((stat & SIP)==SIP) { /* scsi interrupt */ | |
384 | sstat = (unsigned short)scsi_read_byte(SIST+1); | |
385 | sstat <<=8; | |
386 | sstat |= (unsigned short)scsi_read_byte(SIST); | |
387 | for(i=0;i<3;i++) { | |
388 | if(int_stat[i]==0) | |
389 | break; /* found an empty int status */ | |
390 | } | |
391 | int_stat[i]=SCSI_INT_STATE | sstat; | |
392 | stat1=scsi_read_byte(DSTAT); | |
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 & INTF)==INTF) { /* interrupt on Fly */ | |
400 | scsi_write_byte(ISTAT,stat); /* clear it */ | |
401 | for(i=0;i<3;i++) { | |
402 | if(int_stat[i]==0) | |
403 | break; /* found an empty int status */ | |
404 | } | |
405 | int_stat[i]=INT_ON_FY; | |
406 | } | |
407 | } | |
408 | ||
409 | void scsi_bus_reset(void) | |
410 | { | |
411 | unsigned char t; | |
412 | int i; | |
6d0f6bcf | 413 | int end = CONFIG_SYS_SCSI_SPIN_UP_TIME*1000; |
1df49e27 WD |
414 | |
415 | t=scsi_read_byte(SCNTL1); | |
416 | scsi_write_byte(SCNTL1,(t | CRST)); | |
417 | udelay(50); | |
418 | scsi_write_byte(SCNTL1,t); | |
419 | ||
420 | puts("waiting for devices to spin up"); | |
421 | for(i=0;i<end;i++) { | |
422 | udelay(1000); /* give the devices time to spin up */ | |
423 | if (i % 1000 == 0) | |
424 | putc('.'); | |
425 | } | |
426 | putc('\n'); | |
427 | scsi_chip_init(); /* reinit the chip ...*/ | |
428 | ||
429 | } | |
430 | ||
431 | void scsi_int_enable(void) | |
432 | { | |
433 | scsi_write_byte(SIEN,(unsigned char)scsi_int_mask); | |
434 | scsi_write_byte(SIEN+1,(unsigned char)(scsi_int_mask>>8)); | |
435 | scsi_write_byte(DIEN,script_int_mask); | |
436 | } | |
437 | ||
438 | void scsi_write_dsp(unsigned long start) | |
439 | { | |
1df49e27 WD |
440 | #ifdef SCSI_SINGLE_STEP |
441 | unsigned char t; | |
442 | #endif | |
1df49e27 WD |
443 | out32r(scsi_mem_addr + DSP,start); |
444 | #ifdef SCSI_SINGLE_STEP | |
445 | t=scsi_read_byte(DCNTL); | |
446 | t|=STD; | |
447 | scsi_write_byte(DCNTL,t); | |
448 | #endif | |
449 | } | |
450 | ||
451 | /* only used for debug purposes */ | |
452 | void scsi_print_script(void) | |
453 | { | |
454 | printf("script_select @ 0x%08lX\n",(unsigned long)&script_select[0]); | |
455 | printf("script_msgout @ 0x%08lX\n",(unsigned long)&script_msgout[0]); | |
456 | printf("script_msgin @ 0x%08lX\n",(unsigned long)&script_msgin[0]); | |
457 | printf("script_msgext @ 0x%08lX\n",(unsigned long)&script_msg_ext[0]); | |
458 | printf("script_cmd @ 0x%08lX\n",(unsigned long)&script_cmd[0]); | |
459 | printf("script_data_in @ 0x%08lX\n",(unsigned long)&script_data_in[0]); | |
460 | printf("script_data_out @ 0x%08lX\n",(unsigned long)&script_data_out[0]); | |
461 | printf("script_status @ 0x%08lX\n",(unsigned long)&script_status[0]); | |
462 | printf("script_complete @ 0x%08lX\n",(unsigned long)&script_complete[0]); | |
463 | printf("script_error @ 0x%08lX\n",(unsigned long)&script_error[0]); | |
464 | } | |
465 | ||
466 | ||
1df49e27 WD |
467 | void scsi_set_script(ccb *pccb) |
468 | { | |
469 | int busdevfunc = pccb->priv; | |
470 | int i; | |
471 | i=0; | |
472 | script_select[i++]=swap_script(SCR_REG_REG(GPREG, SCR_AND, 0xfe)); | |
473 | script_select[i++]=0; /* LED ON */ | |
474 | script_select[i++]=swap_script(SCR_CLR(SCR_TRG)); /* select initiator mode */ | |
475 | script_select[i++]=0; | |
476 | /* script_select[i++]=swap_script(SCR_SEL_ABS_ATN | pccb->target << 16); */ | |
477 | script_select[i++]=swap_script(SCR_SEL_ABS | pccb->target << 16); | |
478 | script_select[i++]=swap_script(phys_to_bus(&script_cmd[4])); /* error handling */ | |
479 | script_select[i++]=swap_script(SCR_JUMP); /* next section */ | |
480 | /* script_select[i++]=swap_script((unsigned long)&script_msgout[0]); */ /* message out */ | |
481 | script_select[i++]=swap_script(phys_to_bus(&script_cmd[0])); /* command out */ | |
482 | ||
483 | #ifdef SCSI_SINGLE_STEP | |
484 | start_script_select=(unsigned long)&script_select[0]; | |
485 | len_script_select=i*4; | |
486 | #endif | |
487 | ||
488 | i=0; | |
489 | script_msgout[i++]=swap_script(SCR_INT ^ IFFALSE (WHEN (SCR_MSG_OUT))); | |
490 | script_msgout[i++]=SIR_SEL_ATN_NO_MSG_OUT; | |
491 | script_msgout[i++]=swap_script( SCR_MOVE_ABS(1) ^ SCR_MSG_OUT); | |
492 | script_msgout[i++]=swap_script(phys_to_bus(&pccb->msgout[0])); | |
493 | script_msgout[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_COMMAND))); /* if Command phase */ | |
494 | script_msgout[i++]=swap_script(phys_to_bus(&script_cmd[0])); /* switch to command */ | |
495 | script_msgout[i++]=swap_script(SCR_INT); /* interrupt if not */ | |
496 | script_msgout[i++]=SIR_MSG_OUT_NO_CMD; | |
497 | ||
498 | #ifdef SCSI_SINGLE_STEP | |
499 | start_script_msgout=(unsigned long)&script_msgout[0]; | |
500 | len_script_msgout=i*4; | |
501 | #endif | |
502 | i=0; | |
503 | script_cmd[i++]=swap_script(SCR_MOVE_ABS(pccb->cmdlen) ^ SCR_COMMAND); | |
504 | script_cmd[i++]=swap_script(phys_to_bus(&pccb->cmd[0])); | |
505 | script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN))); /* message in ? */ | |
506 | script_cmd[i++]=swap_script(phys_to_bus(&script_msgin[0])); | |
507 | script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_DATA_OUT))); /* data out ? */ | |
508 | script_cmd[i++]=swap_script(phys_to_bus(&script_data_out[0])); | |
509 | script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_DATA_IN))); /* data in ? */ | |
510 | script_cmd[i++]=swap_script(phys_to_bus(&script_data_in[0])); | |
511 | script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_STATUS))); /* status ? */ | |
512 | script_cmd[i++]=swap_script(phys_to_bus(&script_status[0])); | |
513 | script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_COMMAND))); /* command ? */ | |
514 | script_cmd[i++]=swap_script(phys_to_bus(&script_cmd[0])); | |
515 | script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_MSG_OUT))); /* message out ? */ | |
516 | script_cmd[i++]=swap_script(phys_to_bus(&script_msgout[0])); | |
517 | script_cmd[i++]=swap_script(SCR_JUMP ^ IFTRUE (IF (SCR_MSG_IN))); /* just for error handling message in ? */ | |
518 | script_cmd[i++]=swap_script(phys_to_bus(&script_msgin[0])); | |
519 | script_cmd[i++]=swap_script(SCR_INT); /* interrupt if not */ | |
520 | script_cmd[i++]=SIR_CMD_OUT_ILL_PH; | |
521 | #ifdef SCSI_SINGLE_STEP | |
522 | start_script_cmd=(unsigned long)&script_cmd[0]; | |
523 | len_script_cmd=i*4; | |
524 | #endif | |
525 | i=0; | |
526 | script_data_out[i++]=swap_script(SCR_MOVE_ABS(pccb->datalen)^ SCR_DATA_OUT); /* move */ | |
527 | script_data_out[i++]=swap_script(phys_to_bus(pccb->pdata)); /* pointer to buffer */ | |
528 | script_data_out[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_STATUS))); | |
529 | script_data_out[i++]=swap_script(phys_to_bus(&script_status[0])); | |
530 | script_data_out[i++]=swap_script(SCR_INT); | |
531 | script_data_out[i++]=SIR_DATA_OUT_ERR; | |
532 | ||
533 | #ifdef SCSI_SINGLE_STEP | |
534 | start_script_data_out=(unsigned long)&script_data_out[0]; | |
535 | len_script_data_out=i*4; | |
536 | #endif | |
537 | i=0; | |
538 | script_data_in[i++]=swap_script(SCR_MOVE_ABS(pccb->datalen)^ SCR_DATA_IN); /* move */ | |
539 | script_data_in[i++]=swap_script(phys_to_bus(pccb->pdata)); /* pointer to buffer */ | |
540 | script_data_in[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_STATUS))); | |
541 | script_data_in[i++]=swap_script(phys_to_bus(&script_status[0])); | |
542 | script_data_in[i++]=swap_script(SCR_INT); | |
543 | script_data_in[i++]=SIR_DATA_IN_ERR; | |
544 | #ifdef SCSI_SINGLE_STEP | |
545 | start_script_data_in=(unsigned long)&script_data_in[0]; | |
546 | len_script_data_in=i*4; | |
547 | #endif | |
548 | i=0; | |
549 | script_msgin[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); | |
550 | script_msgin[i++]=swap_script(phys_to_bus(&pccb->msgin[0])); | |
551 | script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_COMPLETE))); | |
552 | script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0])); | |
553 | script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_DISCONNECT))); | |
554 | script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0])); | |
555 | script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_SAVE_DP))); | |
556 | script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0])); | |
557 | script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_RESTORE_DP))); | |
558 | script_msgin[i++]=swap_script(phys_to_bus(&script_complete[0])); | |
559 | script_msgin[i++]=swap_script(SCR_JUMP ^ IFTRUE (DATA (M_EXTENDED))); | |
560 | script_msgin[i++]=swap_script(phys_to_bus(&script_msg_ext[0])); | |
561 | script_msgin[i++]=swap_script(SCR_INT); | |
562 | script_msgin[i++]=SIR_MSG_RECEIVED; | |
563 | #ifdef SCSI_SINGLE_STEP | |
564 | start_script_msgin=(unsigned long)&script_msgin[0]; | |
565 | len_script_msgin=i*4; | |
566 | #endif | |
567 | i=0; | |
568 | script_msg_ext[i++]=swap_script(SCR_CLR (SCR_ACK)); /* clear ACK */ | |
569 | script_msg_ext[i++]=0; | |
570 | script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* assuming this is the msg length */ | |
571 | script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[1])); | |
572 | script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN))); | |
573 | script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */ | |
574 | script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */ | |
575 | script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[2])); | |
576 | script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN))); | |
577 | script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */ | |
578 | script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */ | |
579 | script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[3])); | |
580 | script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN))); | |
581 | script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */ | |
582 | script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */ | |
583 | script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[4])); | |
584 | script_msg_ext[i++]=swap_script(SCR_JUMP ^ IFFALSE (IF (SCR_MSG_IN))); | |
585 | script_msg_ext[i++]=swap_script(phys_to_bus(&script_complete[0])); /* no more bytes */ | |
586 | script_msg_ext[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_MSG_IN); /* next */ | |
587 | script_msg_ext[i++]=swap_script(phys_to_bus(&pccb->msgin[5])); | |
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[6])); | |
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[7])); | |
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_INT); | |
599 | script_msg_ext[i++]=SIR_MSG_OVER7; | |
600 | #ifdef SCSI_SINGLE_STEP | |
601 | start_script_msg_ext=(unsigned long)&script_msg_ext[0]; | |
602 | len_script_msg_ext=i*4; | |
603 | #endif | |
604 | i=0; | |
605 | script_status[i++]=swap_script(SCR_MOVE_ABS (1) ^ SCR_STATUS); | |
606 | script_status[i++]=swap_script(phys_to_bus(&pccb->status)); | |
607 | script_status[i++]=swap_script(SCR_JUMP ^ IFTRUE (WHEN (SCR_MSG_IN))); | |
608 | script_status[i++]=swap_script(phys_to_bus(&script_msgin[0])); | |
609 | script_status[i++]=swap_script(SCR_INT); | |
610 | script_status[i++]=SIR_STATUS_ILL_PH; | |
611 | #ifdef SCSI_SINGLE_STEP | |
612 | start_script_status=(unsigned long)&script_status[0]; | |
613 | len_script_status=i*4; | |
614 | #endif | |
615 | i=0; | |
616 | script_complete[i++]=swap_script(SCR_REG_REG (SCNTL2, SCR_AND, 0x7f)); | |
617 | script_complete[i++]=0; | |
618 | script_complete[i++]=swap_script(SCR_CLR (SCR_ACK|SCR_ATN)); | |
619 | script_complete[i++]=0; | |
620 | script_complete[i++]=swap_script(SCR_WAIT_DISC); | |
621 | script_complete[i++]=0; | |
622 | script_complete[i++]=swap_script(SCR_REG_REG(GPREG, SCR_OR, 0x01)); | |
623 | script_complete[i++]=0; /* LED OFF */ | |
624 | script_complete[i++]=swap_script(SCR_INT); | |
625 | script_complete[i++]=SIR_COMPLETE; | |
626 | #ifdef SCSI_SINGLE_STEP | |
627 | start_script_complete=(unsigned long)&script_complete[0]; | |
628 | len_script_complete=i*4; | |
629 | #endif | |
630 | i=0; | |
631 | script_error[i++]=swap_script(SCR_INT); /* interrupt if error */ | |
632 | script_error[i++]=SIR_SCRIPT_ERROR; | |
633 | #ifdef SCSI_SINGLE_STEP | |
634 | start_script_error=(unsigned long)&script_error[0]; | |
635 | len_script_error=i*4; | |
636 | #endif | |
637 | i=0; | |
638 | script_reselection[i++]=swap_script(SCR_CLR (SCR_TRG)); /* target status */ | |
639 | script_reselection[i++]=0; | |
640 | script_reselection[i++]=swap_script(SCR_WAIT_RESEL); | |
641 | script_reselection[i++]=swap_script(phys_to_bus(&script_select[0])); /* len = 4 */ | |
642 | #ifdef SCSI_SINGLE_STEP | |
643 | start_script_reselection=(unsigned long)&script_reselection[0]; | |
644 | len_script_reselection=i*4; | |
645 | #endif | |
646 | } | |
647 | ||
648 | ||
1df49e27 WD |
649 | void scsi_issue(ccb *pccb) |
650 | { | |
651 | int busdevfunc = pccb->priv; | |
652 | int i; | |
653 | unsigned short sstat; | |
53677ef1 | 654 | int retrycnt; /* retry counter */ |
1df49e27 WD |
655 | for(i=0;i<3;i++) |
656 | int_stat[i]=0; /* delete all int status */ | |
657 | /* struct pccb must be set-up correctly */ | |
658 | retrycnt=0; | |
659 | PRINTF("ID %d issue cmd %02X\n",pccb->target,pccb->cmd[0]); | |
660 | pccb->trans_bytes=0; /* no bytes transfered yet */ | |
661 | scsi_set_script(pccb); /* fill in SCRIPT */ | |
662 | scsi_int_mask=STO | UDC | MA; /* | CMP; / * Interrupts which are enabled */ | |
663 | script_int_mask=0xff; /* enable all Ints */ | |
664 | scsi_int_enable(); | |
665 | scsi_write_dsp(phys_to_bus(&script_select[0])); /* start script */ | |
666 | /* now we have to wait for IRQs */ | |
667 | retry: | |
668 | /* | |
669 | * This version of the driver is _not_ interrupt driven, | |
670 | * but polls the chip's interrupt registers (ISTAT, DSTAT). | |
671 | */ | |
672 | while(int_stat[0]==0) | |
673 | handle_scsi_int(); | |
674 | ||
675 | if(int_stat[0]==SIR_COMPLETE) { | |
676 | if(pccb->msgin[0]==M_DISCONNECT) { | |
677 | PRINTF("Wait for reselection\n"); | |
678 | for(i=0;i<3;i++) | |
679 | int_stat[i]=0; /* delete all int status */ | |
680 | scsi_write_dsp(phys_to_bus(&script_reselection[0])); /* start reselection script */ | |
681 | goto retry; | |
682 | } | |
683 | pccb->contr_stat=SIR_COMPLETE; | |
684 | return; | |
685 | } | |
686 | if((int_stat[0] & SCSI_INT_STATE)==SCSI_INT_STATE) { /* scsi interrupt */ | |
687 | sstat=(unsigned short)int_stat[0]; | |
688 | if((sstat & STO)==STO) { /* selection timeout */ | |
689 | pccb->contr_stat=SCSI_SEL_TIME_OUT; | |
690 | scsi_write_byte(GPREG,0x01); | |
691 | PRINTF("ID: %X Selection Timeout\n",pccb->target); | |
692 | return; | |
693 | } | |
694 | if((sstat & UDC)==UDC) { /* unexpected disconnect */ | |
695 | pccb->contr_stat=SCSI_UNEXP_DIS; | |
696 | scsi_write_byte(GPREG,0x01); | |
697 | PRINTF("ID: %X Unexpected Disconnect\n",pccb->target); | |
698 | return; | |
699 | } | |
700 | if((sstat & RSL)==RSL) { /* reselection */ | |
701 | pccb->contr_stat=SCSI_UNEXP_DIS; | |
702 | scsi_write_byte(GPREG,0x01); | |
703 | PRINTF("ID: %X Unexpected Disconnect\n",pccb->target); | |
704 | return; | |
705 | } | |
706 | if(((sstat & MA)==MA)||((sstat & HTH)==HTH)) { /* phase missmatch */ | |
707 | if(retrycnt<SCSI_MAX_RETRY) { | |
708 | pccb->trans_bytes=pccb->datalen - | |
709 | ((unsigned long)scsi_read_byte(DBC) | | |
710 | ((unsigned long)scsi_read_byte(DBC+1)<<8) | | |
711 | ((unsigned long)scsi_read_byte(DBC+2)<<16)); | |
712 | for(i=0;i<3;i++) | |
713 | int_stat[i]=0; /* delete all int status */ | |
714 | retrycnt++; | |
715 | PRINTF("ID: %X Phase Missmatch Retry %d Phase %02X transfered %lx\n", | |
716 | pccb->target,retrycnt,scsi_read_byte(SBCL),pccb->trans_bytes); | |
717 | scsi_write_dsp(phys_to_bus(&script_cmd[4])); /* start retry script */ | |
718 | goto retry; | |
719 | } | |
720 | if((sstat & MA)==MA) | |
721 | pccb->contr_stat=SCSI_MA_TIME_OUT; | |
722 | else | |
723 | pccb->contr_stat=SCSI_HNS_TIME_OUT; | |
724 | PRINTF("Phase Missmatch stat %lx\n",pccb->contr_stat); | |
725 | return; | |
726 | } /* no phase int */ | |
727 | /* if((sstat & CMP)==CMP) { | |
728 | pccb->contr_stat=SIR_COMPLETE; | |
729 | return; | |
730 | } | |
731 | */ | |
732 | PRINTF("SCSI INT %lX\n",int_stat[0]); | |
733 | pccb->contr_stat=int_stat[0]; | |
734 | return; | |
735 | } /* end scsi int */ | |
736 | PRINTF("SCRIPT INT %lX phase %02X\n",int_stat[0],scsi_read_byte(SBCL)); | |
737 | pccb->contr_stat=int_stat[0]; | |
738 | return; | |
739 | } | |
740 | ||
741 | int scsi_exec(ccb *pccb) | |
742 | { | |
743 | unsigned char tmpcmd[16],tmpstat; | |
744 | int i,retrycnt,t; | |
745 | unsigned long transbytes,datalen; | |
746 | unsigned char *tmpptr; | |
747 | retrycnt=0; | |
748 | retry: | |
749 | scsi_issue(pccb); | |
750 | if(pccb->contr_stat!=SIR_COMPLETE) | |
472d5460 | 751 | return false; |
1df49e27 | 752 | if(pccb->status==S_GOOD) |
472d5460 | 753 | return true; |
1df49e27 WD |
754 | if(pccb->status==S_CHECK_COND) { /* check condition */ |
755 | for(i=0;i<16;i++) | |
756 | tmpcmd[i]=pccb->cmd[i]; | |
757 | pccb->cmd[0]=SCSI_REQ_SENSE; | |
758 | pccb->cmd[1]=pccb->lun<<5; | |
759 | pccb->cmd[2]=0; | |
760 | pccb->cmd[3]=0; | |
761 | pccb->cmd[4]=14; | |
762 | pccb->cmd[5]=0; | |
763 | pccb->cmdlen=6; | |
764 | pccb->msgout[0]=SCSI_IDENTIFY; | |
765 | transbytes=pccb->trans_bytes; | |
766 | tmpptr=pccb->pdata; | |
d0ff51ba | 767 | pccb->pdata = &pccb->sense_buf[0]; |
1df49e27 WD |
768 | datalen=pccb->datalen; |
769 | pccb->datalen=14; | |
770 | tmpstat=pccb->status; | |
771 | scsi_issue(pccb); | |
772 | for(i=0;i<16;i++) | |
773 | pccb->cmd[i]=tmpcmd[i]; | |
774 | pccb->trans_bytes=transbytes; | |
775 | pccb->pdata=tmpptr; | |
776 | pccb->datalen=datalen; | |
777 | pccb->status=tmpstat; | |
778 | PRINTF("Request_sense sense key %x ASC %x ASCQ %x\n",pccb->sense_buf[2]&0x0f, | |
779 | pccb->sense_buf[12],pccb->sense_buf[13]); | |
780 | switch(pccb->sense_buf[2]&0xf) { | |
781 | case SENSE_NO_SENSE: | |
782 | case SENSE_RECOVERED_ERROR: | |
783 | /* seems to be ok */ | |
472d5460 | 784 | return true; |
1df49e27 WD |
785 | break; |
786 | case SENSE_NOT_READY: | |
787 | if((pccb->sense_buf[12]!=0x04)||(pccb->sense_buf[13]!=0x01)) { | |
788 | /* if device is not in process of becoming ready */ | |
472d5460 | 789 | return false; |
1df49e27 WD |
790 | break; |
791 | } /* else fall through */ | |
792 | case SENSE_UNIT_ATTENTION: | |
793 | if(retrycnt<SCSI_MAX_RETRY_NOT_READY) { | |
794 | PRINTF("Target %d not ready, retry %d\n",pccb->target,retrycnt); | |
795 | for(t=0;t<SCSI_NOT_READY_TIME_OUT;t++) | |
796 | udelay(1000); /* 1sec wait */ | |
797 | retrycnt++; | |
798 | goto retry; | |
799 | } | |
800 | PRINTF("Target %d not ready, %d retried\n",pccb->target,retrycnt); | |
472d5460 | 801 | return false; |
1df49e27 | 802 | default: |
472d5460 | 803 | return false; |
1df49e27 WD |
804 | } |
805 | } | |
806 | PRINTF("Status = %X\n",pccb->status); | |
472d5460 | 807 | return false; |
1df49e27 WD |
808 | } |
809 | ||
810 | ||
1df49e27 WD |
811 | void scsi_chip_init(void) |
812 | { | |
813 | /* first we issue a soft reset */ | |
814 | scsi_write_byte(ISTAT,SRST); | |
815 | udelay(1000); | |
816 | scsi_write_byte(ISTAT,0); | |
817 | /* setup chip */ | |
818 | scsi_write_byte(SCNTL0,0xC0); /* full arbitration no start, no message, parity disabled, master */ | |
819 | scsi_write_byte(SCNTL1,0x00); | |
820 | scsi_write_byte(SCNTL2,0x00); | |
8ed44d91 | 821 | #ifndef CONFIG_SYS_SCSI_SYM53C8XX_CCF /* config value for none 40 MHz clocks */ |
1df49e27 WD |
822 | scsi_write_byte(SCNTL3,0x13); /* synchronous clock 40/4=10MHz, asynchronous 40MHz */ |
823 | #else | |
8ed44d91 | 824 | scsi_write_byte(SCNTL3,CONFIG_SYS_SCSI_SYM53C8XX_CCF); /* config value for none 40 MHz clocks */ |
1df49e27 WD |
825 | #endif |
826 | scsi_write_byte(SCID,0x47); /* ID=7, enable reselection */ | |
827 | scsi_write_byte(SXFER,0x00); /* synchronous transfer period 10MHz, asynchronous */ | |
828 | scsi_write_byte(SDID,0x00); /* targed SCSI ID = 0 */ | |
829 | scsi_int_mask=0x0000; /* no Interrupt is enabled */ | |
830 | script_int_mask=0x00; | |
831 | scsi_int_enable(); | |
832 | scsi_write_byte(GPREG,0x01); /* GPIO0 is LED (off) */ | |
833 | scsi_write_byte(GPCNTL,0x0E); /* GPIO0 is Output */ | |
834 | scsi_write_byte(STIME0,0x08); /* handshake timer disabled, selection timeout 512msec */ | |
835 | scsi_write_byte(RESPID,0x80); /* repond only to the own ID (reselection) */ | |
836 | scsi_write_byte(STEST1,0x00); /* not isolated, SCLK is used */ | |
837 | scsi_write_byte(STEST2,0x00); /* no Lowlevel Mode? */ | |
838 | scsi_write_byte(STEST3,0x80); /* enable tolerANT */ | |
839 | scsi_write_byte(CTEST3,0x04); /* clear FIFO */ | |
840 | scsi_write_byte(CTEST4,0x00); | |
841 | scsi_write_byte(CTEST5,0x00); | |
842 | #ifdef SCSI_SINGLE_STEP | |
843 | /* scsi_write_byte(DCNTL,IRQM | SSM); */ | |
844 | scsi_write_byte(DCNTL,IRQD | SSM); | |
845 | scsi_write_byte(DMODE,MAN); | |
846 | #else | |
847 | /* scsi_write_byte(DCNTL,IRQM); */ | |
848 | scsi_write_byte(DCNTL,IRQD); | |
849 | scsi_write_byte(DMODE,0x00); | |
850 | #endif | |
851 | } | |
cb51c0bf | 852 | #endif |