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1 /*
2  * (C) Copyright 2001
3  * Denis Peter, MPL AG Switzerland
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  *
23  *
24  *
25  */
26
27 /*
28  * SCSI support.
29  */
30 #include <common.h>
31 #include <command.h>
32 #include <asm/processor.h>
33 #include <scsi.h>
34 #include <image.h>
35 #include <pci.h>
36
37 #ifdef CONFIG_SCSI_SYM53C8XX
38 #define SCSI_VEND_ID    0x1000
39 #ifndef CONFIG_SCSI_DEV_ID
40 #define SCSI_DEV_ID             0x0001
41 #else
42 #define SCSI_DEV_ID             CONFIG_SCSI_DEV_ID
43 #endif
44 #elif defined CONFIG_SATA_ULI5288
45
46 #define SCSI_VEND_ID 0x10b9
47 #define SCSI_DEV_ID  0x5288
48
49 #else
50 #error no scsi device defined
51 #endif
52
53
54 static ccb tempccb;     /* temporary scsi command buffer */
55
56 static unsigned char tempbuff[512]; /* temporary data buffer */
57
58 static int scsi_max_devs; /* number of highest available scsi device */
59
60 static int scsi_curr_dev; /* current device */
61
62 static block_dev_desc_t scsi_dev_desc[CFG_SCSI_MAX_DEVICE];
63
64 /********************************************************************************
65  *  forward declerations of some Setup Routines
66  */
67 void scsi_setup_test_unit_ready(ccb * pccb);
68 void scsi_setup_read_capacity(ccb * pccb);
69 void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks);
70 void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks);
71 void scsi_setup_inquiry(ccb * pccb);
72 void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len);
73
74
75 ulong scsi_read(int device, ulong blknr, ulong blkcnt, void *buffer);
76
77
78 /*********************************************************************************
79  * (re)-scan the scsi bus and reports scsi device info
80  * to the user if mode = 1
81  */
82 void scsi_scan(int mode)
83 {
84         unsigned char i,perq,modi,lun;
85         unsigned long capacity,blksz;
86         ccb* pccb=(ccb *)&tempccb;
87
88         if(mode==1) {
89                 printf("scanning bus for devices...\n");
90         }
91         for(i=0;i<CFG_SCSI_MAX_DEVICE;i++) {
92                 scsi_dev_desc[i].target=0xff;
93                 scsi_dev_desc[i].lun=0xff;
94                 scsi_dev_desc[i].lba=0;
95                 scsi_dev_desc[i].blksz=0;
96                 scsi_dev_desc[i].type=DEV_TYPE_UNKNOWN;
97                 scsi_dev_desc[i].vendor[0]=0;
98                 scsi_dev_desc[i].product[0]=0;
99                 scsi_dev_desc[i].revision[0]=0;
100                 scsi_dev_desc[i].removable=FALSE;
101                 scsi_dev_desc[i].if_type=IF_TYPE_SCSI;
102                 scsi_dev_desc[i].dev=i;
103                 scsi_dev_desc[i].part_type=PART_TYPE_UNKNOWN;
104                 scsi_dev_desc[i].block_read=scsi_read;
105         }
106         scsi_max_devs=0;
107         for(i=0;i<CFG_SCSI_MAX_SCSI_ID;i++) {
108                 pccb->target=i;
109                 for(lun=0;lun<CFG_SCSI_MAX_LUN;lun++) {
110                         pccb->lun=lun;
111                         pccb->pdata=(unsigned char *)&tempbuff;
112                         pccb->datalen=512;
113                         scsi_setup_inquiry(pccb);
114                         if(scsi_exec(pccb)!=TRUE) {
115                                 if(pccb->contr_stat==SCSI_SEL_TIME_OUT) {
116                                         debug ("Selection timeout ID %d\n",pccb->target);
117                                         continue; /* selection timeout => assuming no device present */
118                                 }
119                                 scsi_print_error(pccb);
120                                 continue;
121                         }
122                         perq=tempbuff[0];
123                         modi=tempbuff[1];
124                         if((perq & 0x1f)==0x1f) {
125                                 continue; /* skip unknown devices */
126                         }
127                         if((modi&0x80)==0x80) /* drive is removable */
128                                 scsi_dev_desc[scsi_max_devs].removable=TRUE;
129                         /* get info for this device */
130                         scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].vendor[0],
131                                        &tempbuff[8], 8);
132                         scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].product[0],
133                                        &tempbuff[16], 16);
134                         scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].revision[0],
135                                        &tempbuff[32], 4);
136                         scsi_dev_desc[scsi_max_devs].target=pccb->target;
137                         scsi_dev_desc[scsi_max_devs].lun=pccb->lun;
138
139                         pccb->datalen=0;
140                         scsi_setup_test_unit_ready(pccb);
141                         if(scsi_exec(pccb)!=TRUE) {
142                                 if(scsi_dev_desc[scsi_max_devs].removable==TRUE) {
143                                         scsi_dev_desc[scsi_max_devs].type=perq;
144                                         goto removable;
145                                 }
146                                 scsi_print_error(pccb);
147                                 continue;
148                         }
149                         pccb->datalen=8;
150                         scsi_setup_read_capacity(pccb);
151                         if(scsi_exec(pccb)!=TRUE) {
152                                 scsi_print_error(pccb);
153                                 continue;
154                         }
155                         capacity=((unsigned long)tempbuff[0]<<24)|((unsigned long)tempbuff[1]<<16)|
156                                         ((unsigned long)tempbuff[2]<<8)|((unsigned long)tempbuff[3]);
157                         blksz=((unsigned long)tempbuff[4]<<24)|((unsigned long)tempbuff[5]<<16)|
158                                 ((unsigned long)tempbuff[6]<<8)|((unsigned long)tempbuff[7]);
159                         scsi_dev_desc[scsi_max_devs].lba=capacity;
160                         scsi_dev_desc[scsi_max_devs].blksz=blksz;
161                         scsi_dev_desc[scsi_max_devs].type=perq;
162                         init_part(&scsi_dev_desc[scsi_max_devs]);
163 removable:
164                         if(mode==1) {
165                                 printf ("  Device %d: ", scsi_max_devs);
166                                 dev_print(&scsi_dev_desc[scsi_max_devs]);
167                         } /* if mode */
168                         scsi_max_devs++;
169                 } /* next LUN */
170         }
171         if(scsi_max_devs>0)
172                 scsi_curr_dev=0;
173         else
174                 scsi_curr_dev=-1;
175 }
176
177
178 void scsi_init(void)
179 {
180         int busdevfunc;
181
182         busdevfunc=pci_find_device(SCSI_VEND_ID,SCSI_DEV_ID,0); /* get PCI Device ID */
183         if(busdevfunc==-1) {
184                 printf("Error SCSI Controller (%04X,%04X) not found\n",SCSI_VEND_ID,SCSI_DEV_ID);
185                 return;
186         }
187 #ifdef DEBUG
188         else {
189                 printf("SCSI Controller (%04X,%04X) found (%d:%d:%d)\n",SCSI_VEND_ID,SCSI_DEV_ID,(busdevfunc>>16)&0xFF,(busdevfunc>>11)&0x1F,(busdevfunc>>8)&0x7);
190         }
191 #endif
192         scsi_low_level_init(busdevfunc);
193         scsi_scan(1);
194 }
195
196 block_dev_desc_t * scsi_get_dev(int dev)
197 {
198         return (dev < CFG_SCSI_MAX_DEVICE) ? &scsi_dev_desc[dev] : NULL;
199 }
200
201
202 /******************************************************************************
203  * scsi boot command intepreter. Derived from diskboot
204  */
205 int do_scsiboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
206 {
207         char *boot_device = NULL;
208         char *ep;
209         int dev, part = 0;
210         ulong addr, cnt;
211         disk_partition_t info;
212         image_header_t *hdr;
213         int rcode = 0;
214 #if defined(CONFIG_FIT)
215         const void *fit_hdr;
216 #endif
217
218         switch (argc) {
219         case 1:
220                 addr = CFG_LOAD_ADDR;
221                 boot_device = getenv ("bootdevice");
222                 break;
223         case 2:
224                 addr = simple_strtoul(argv[1], NULL, 16);
225                 boot_device = getenv ("bootdevice");
226                 break;
227         case 3:
228                 addr = simple_strtoul(argv[1], NULL, 16);
229                 boot_device = argv[2];
230                 break;
231         default:
232                 printf ("Usage:\n%s\n", cmdtp->usage);
233                 return 1;
234         }
235
236         if (!boot_device) {
237                 puts ("\n** No boot device **\n");
238                 return 1;
239         }
240
241         dev = simple_strtoul(boot_device, &ep, 16);
242         printf("booting from dev %d\n",dev);
243         if (scsi_dev_desc[dev].type == DEV_TYPE_UNKNOWN) {
244                 printf ("\n** Device %d not available\n", dev);
245                 return 1;
246         }
247
248         if (*ep) {
249                 if (*ep != ':') {
250                         puts ("\n** Invalid boot device, use `dev[:part]' **\n");
251                         return 1;
252                 }
253                 part = simple_strtoul(++ep, NULL, 16);
254         }
255         if (get_partition_info (&scsi_dev_desc[dev], part, &info)) {
256                 printf("error reading partinfo\n");
257                 return 1;
258         }
259         if ((strncmp((char *)(info.type), BOOT_PART_TYPE, sizeof(info.type)) != 0) &&
260             (strncmp((char *)(info.type), BOOT_PART_COMP, sizeof(info.type)) != 0)) {
261                 printf ("\n** Invalid partition type \"%.32s\""
262                         " (expect \"" BOOT_PART_TYPE "\")\n",
263                         info.type);
264                 return 1;
265         }
266
267         printf ("\nLoading from SCSI device %d, partition %d: "
268                 "Name: %.32s  Type: %.32s\n",
269                 dev, part, info.name, info.type);
270
271         debug ("First Block: %ld,  # of blocks: %ld, Block Size: %ld\n",
272                 info.start, info.size, info.blksz);
273
274         if (scsi_read (dev, info.start, 1, (ulong *)addr) != 1) {
275                 printf ("** Read error on %d:%d\n", dev, part);
276                 return 1;
277         }
278
279         switch (genimg_get_format ((void *)addr)) {
280         case IMAGE_FORMAT_LEGACY:
281                 hdr = (image_header_t *)addr;
282
283                 if (!image_check_hcrc (hdr)) {
284                         puts ("\n** Bad Header Checksum **\n");
285                         return 1;
286                 }
287
288                 image_print_contents (hdr);
289                 cnt = image_get_image_size (hdr);
290                 break;
291 #if defined(CONFIG_FIT)
292         case IMAGE_FORMAT_FIT:
293                 fit_hdr = (const void *)addr;
294                 if (!fit_check_format (fit_hdr)) {
295                         puts ("** Bad FIT image format\n");
296                         return 1;
297                 }
298                 puts ("Fit image detected...\n");
299
300                 cnt = fit_get_size (fit_hdr);
301                 break;
302 #endif
303         default:
304                 puts ("** Unknown image type\n");
305                 return 1;
306         }
307
308         cnt += info.blksz - 1;
309         cnt /= info.blksz;
310         cnt -= 1;
311
312         if (scsi_read (dev, info.start+1, cnt,
313                       (ulong *)(addr+info.blksz)) != cnt) {
314                 printf ("** Read error on %d:%d\n", dev, part);
315                 return 1;
316         }
317
318 #if defined(CONFIG_FIT)
319         /* This cannot be done earlier, we need complete FIT image in RAM first */
320         if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT)
321                 fit_print_contents ((const void *)addr);
322 #endif
323
324         /* Loading ok, update default load address */
325         load_addr = addr;
326
327         flush_cache (addr, (cnt+1)*info.blksz);
328
329         /* Check if we should attempt an auto-start */
330         if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) {
331                 char *local_args[2];
332                 extern int do_bootm (cmd_tbl_t *, int, int, char *[]);
333                 local_args[0] = argv[0];
334                 local_args[1] = NULL;
335                 printf ("Automatic boot of image at addr 0x%08lX ...\n", addr);
336                 rcode = do_bootm (cmdtp, 0, 1, local_args);
337         }
338          return rcode;
339 }
340
341 /*********************************************************************************
342  * scsi command intepreter
343  */
344 int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
345 {
346         switch (argc) {
347     case 0:
348     case 1:     printf ("Usage:\n%s\n", cmdtp->usage);  return 1;
349     case 2:
350                         if (strncmp(argv[1],"res",3) == 0) {
351                                 printf("\nReset SCSI\n");
352                                 scsi_bus_reset();
353                                 scsi_scan(1);
354                                 return 0;
355                         }
356                         if (strncmp(argv[1],"inf",3) == 0) {
357                                 int i;
358                                 for (i=0; i<CFG_SCSI_MAX_DEVICE; ++i) {
359                                         if(scsi_dev_desc[i].type==DEV_TYPE_UNKNOWN)
360                                                 continue; /* list only known devices */
361                                         printf ("SCSI dev. %d:  ", i);
362                                         dev_print(&scsi_dev_desc[i]);
363                                 }
364                                 return 0;
365                         }
366                         if (strncmp(argv[1],"dev",3) == 0) {
367                                 if ((scsi_curr_dev < 0) || (scsi_curr_dev >= CFG_SCSI_MAX_DEVICE)) {
368                                         printf("\nno SCSI devices available\n");
369                                         return 1;
370                                 }
371                                 printf ("\n    Device %d: ", scsi_curr_dev);
372                                 dev_print(&scsi_dev_desc[scsi_curr_dev]);
373                                 return 0;
374                         }
375                         if (strncmp(argv[1],"scan",4) == 0) {
376                                 scsi_scan(1);
377                                 return 0;
378                         }
379                         if (strncmp(argv[1],"part",4) == 0) {
380                                 int dev, ok;
381                                 for (ok=0, dev=0; dev<CFG_SCSI_MAX_DEVICE; ++dev) {
382                                         if (scsi_dev_desc[dev].type!=DEV_TYPE_UNKNOWN) {
383                                                 ok++;
384                                                 if (dev)
385                                                         printf("\n");
386                                                 debug ("print_part of %x\n",dev);
387                                                         print_part(&scsi_dev_desc[dev]);
388                                         }
389                                 }
390                                 if (!ok)
391                                         printf("\nno SCSI devices available\n");
392                                 return 1;
393                         }
394                         printf ("Usage:\n%s\n", cmdtp->usage);
395                         return 1;
396         case 3:
397                         if (strncmp(argv[1],"dev",3) == 0) {
398                                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
399                                 printf ("\nSCSI device %d: ", dev);
400                                 if (dev >= CFG_SCSI_MAX_DEVICE) {
401                                         printf("unknown device\n");
402                                         return 1;
403                                 }
404                                 printf ("\n    Device %d: ", dev);
405                                 dev_print(&scsi_dev_desc[dev]);
406                                 if(scsi_dev_desc[dev].type == DEV_TYPE_UNKNOWN) {
407                                         return 1;
408                                 }
409                                 scsi_curr_dev = dev;
410                                 printf("... is now current device\n");
411                                 return 0;
412                         }
413                         if (strncmp(argv[1],"part",4) == 0) {
414                                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
415                                 if(scsi_dev_desc[dev].type != DEV_TYPE_UNKNOWN) {
416                                         print_part(&scsi_dev_desc[dev]);
417                                 }
418                                 else {
419                                         printf ("\nSCSI device %d not available\n", dev);
420                                 }
421                                 return 1;
422                         }
423                         printf ("Usage:\n%s\n", cmdtp->usage);
424                         return 1;
425     default:
426                         /* at least 4 args */
427                         if (strcmp(argv[1],"read") == 0) {
428                                 ulong addr = simple_strtoul(argv[2], NULL, 16);
429                                 ulong blk  = simple_strtoul(argv[3], NULL, 16);
430                                 ulong cnt  = simple_strtoul(argv[4], NULL, 16);
431                                 ulong n;
432                                 printf ("\nSCSI read: device %d block # %ld, count %ld ... ",
433                                                 scsi_curr_dev, blk, cnt);
434                                 n = scsi_read(scsi_curr_dev, blk, cnt, (ulong *)addr);
435                                 printf ("%ld blocks read: %s\n",n,(n==cnt) ? "OK" : "ERROR");
436                                 return 0;
437                         }
438         } /* switch */
439         printf ("Usage:\n%s\n", cmdtp->usage);
440         return 1;
441 }
442
443 /****************************************************************************************
444  * scsi_read
445  */
446
447 #define SCSI_MAX_READ_BLK 0xFFFF /* almost the maximum amount of the scsi_ext command.. */
448
449 ulong scsi_read(int device, ulong blknr, ulong blkcnt, void *buffer)
450 {
451         ulong start,blks, buf_addr;
452         unsigned short smallblks;
453         ccb* pccb=(ccb *)&tempccb;
454         device&=0xff;
455         /* Setup  device
456          */
457         pccb->target=scsi_dev_desc[device].target;
458         pccb->lun=scsi_dev_desc[device].lun;
459         buf_addr=(unsigned long)buffer;
460         start=blknr;
461         blks=blkcnt;
462         debug ("\nscsi_read: dev %d startblk %lx, blccnt %lx buffer %lx\n",device,start,blks,(unsigned long)buffer);
463         do {
464                 pccb->pdata=(unsigned char *)buf_addr;
465                 if(blks>SCSI_MAX_READ_BLK) {
466                         pccb->datalen=scsi_dev_desc[device].blksz * SCSI_MAX_READ_BLK;
467                         smallblks=SCSI_MAX_READ_BLK;
468                         scsi_setup_read_ext(pccb,start,smallblks);
469                         start+=SCSI_MAX_READ_BLK;
470                         blks-=SCSI_MAX_READ_BLK;
471                 }
472                 else {
473                         pccb->datalen=scsi_dev_desc[device].blksz * blks;
474                         smallblks=(unsigned short) blks;
475                         scsi_setup_read_ext(pccb,start,smallblks);
476                         start+=blks;
477                         blks=0;
478                 }
479                 debug ("scsi_read_ext: startblk %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr);
480                 if(scsi_exec(pccb)!=TRUE) {
481                         scsi_print_error(pccb);
482                         blkcnt-=blks;
483                         break;
484                 }
485                 buf_addr+=pccb->datalen;
486         } while(blks!=0);
487         debug ("scsi_read_ext: end startblk %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr);
488         return(blkcnt);
489 }
490
491 /* copy src to dest, skipping leading and trailing blanks
492  * and null terminate the string
493  */
494 void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len)
495 {
496         int start,end;
497
498         start=0;
499         while(start<len) {
500                 if(src[start]!=' ')
501                         break;
502                 start++;
503         }
504         end=len-1;
505         while(end>start) {
506                 if(src[end]!=' ')
507                         break;
508                 end--;
509         }
510         for( ; start<=end; start++) {
511                 *dest++=src[start];
512         }
513         *dest='\0';
514 }
515
516
517 /* Trim trailing blanks, and NUL-terminate string
518  */
519 void scsi_trim_trail (unsigned char *str, unsigned int len)
520 {
521         unsigned char *p = str + len - 1;
522
523         while (len-- > 0) {
524                 *p-- = '\0';
525                 if (*p != ' ') {
526                         return;
527                 }
528         }
529 }
530
531
532 /************************************************************************************
533  * Some setup (fill-in) routines
534  */
535 void scsi_setup_test_unit_ready(ccb * pccb)
536 {
537         pccb->cmd[0]=SCSI_TST_U_RDY;
538         pccb->cmd[1]=pccb->lun<<5;
539         pccb->cmd[2]=0;
540         pccb->cmd[3]=0;
541         pccb->cmd[4]=0;
542         pccb->cmd[5]=0;
543         pccb->cmdlen=6;
544         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
545 }
546
547 void scsi_setup_read_capacity(ccb * pccb)
548 {
549         pccb->cmd[0]=SCSI_RD_CAPAC;
550         pccb->cmd[1]=pccb->lun<<5;
551         pccb->cmd[2]=0;
552         pccb->cmd[3]=0;
553         pccb->cmd[4]=0;
554         pccb->cmd[5]=0;
555         pccb->cmd[6]=0;
556         pccb->cmd[7]=0;
557         pccb->cmd[8]=0;
558         pccb->cmd[9]=0;
559         pccb->cmdlen=10;
560         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
561
562 }
563
564 void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks)
565 {
566         pccb->cmd[0]=SCSI_READ10;
567         pccb->cmd[1]=pccb->lun<<5;
568         pccb->cmd[2]=((unsigned char) (start>>24))&0xff;
569         pccb->cmd[3]=((unsigned char) (start>>16))&0xff;
570         pccb->cmd[4]=((unsigned char) (start>>8))&0xff;
571         pccb->cmd[5]=((unsigned char) (start))&0xff;
572         pccb->cmd[6]=0;
573         pccb->cmd[7]=((unsigned char) (blocks>>8))&0xff;
574         pccb->cmd[8]=(unsigned char) blocks & 0xff;
575         pccb->cmd[6]=0;
576         pccb->cmdlen=10;
577         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
578         debug ("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
579                 pccb->cmd[0],pccb->cmd[1],
580                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4],pccb->cmd[5],
581                 pccb->cmd[7],pccb->cmd[8]);
582 }
583
584 void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks)
585 {
586         pccb->cmd[0]=SCSI_READ6;
587         pccb->cmd[1]=pccb->lun<<5 | (((unsigned char)(start>>16))&0x1f);
588         pccb->cmd[2]=((unsigned char) (start>>8))&0xff;
589         pccb->cmd[3]=((unsigned char) (start))&0xff;
590         pccb->cmd[4]=(unsigned char) blocks & 0xff;
591         pccb->cmd[5]=0;
592         pccb->cmdlen=6;
593         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
594         debug ("scsi_setup_read6: cmd: %02X %02X startblk %02X%02X blccnt %02X\n",
595                 pccb->cmd[0],pccb->cmd[1],
596                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4]);
597 }
598
599
600 void scsi_setup_inquiry(ccb * pccb)
601 {
602         pccb->cmd[0]=SCSI_INQUIRY;
603         pccb->cmd[1]=pccb->lun<<5;
604         pccb->cmd[2]=0;
605         pccb->cmd[3]=0;
606         if(pccb->datalen>255)
607                 pccb->cmd[4]=255;
608         else
609                 pccb->cmd[4]=(unsigned char)pccb->datalen;
610         pccb->cmd[5]=0;
611         pccb->cmdlen=6;
612         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
613 }
614
615
616 U_BOOT_CMD(
617         scsi, 5, 1, do_scsi,
618         "scsi    - SCSI sub-system\n",
619         "reset - reset SCSI controller\n"
620         "scsi info  - show available SCSI devices\n"
621         "scsi scan  - (re-)scan SCSI bus\n"
622         "scsi device [dev] - show or set current device\n"
623         "scsi part [dev] - print partition table of one or all SCSI devices\n"
624         "scsi read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
625         "     to memory address `addr'\n"
626 );
627
628 U_BOOT_CMD(
629         scsiboot, 3, 1, do_scsiboot,
630         "scsiboot- boot from SCSI device\n",
631         "loadAddr dev:part\n"
632 );