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[u-boot] / common / cmd_scsi.c
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[CONFIG_SYS_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<CONFIG_SYS_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<CONFIG_SYS_SCSI_MAX_SCSI_ID;i++) {
108                 pccb->target=i;
109                 for(lun=0;lun<CONFIG_SYS_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 < CONFIG_SYS_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 * const 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 = NULL;
216 #endif
217
218         switch (argc) {
219         case 1:
220                 addr = CONFIG_SYS_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                 return cmd_usage(cmdtp);
233         }
234
235         if (!boot_device) {
236                 puts ("\n** No boot device **\n");
237                 return 1;
238         }
239
240         dev = simple_strtoul(boot_device, &ep, 16);
241         printf("booting from dev %d\n",dev);
242         if (scsi_dev_desc[dev].type == DEV_TYPE_UNKNOWN) {
243                 printf ("\n** Device %d not available\n", dev);
244                 return 1;
245         }
246
247         if (*ep) {
248                 if (*ep != ':') {
249                         puts ("\n** Invalid boot device, use `dev[:part]' **\n");
250                         return 1;
251                 }
252                 part = simple_strtoul(++ep, NULL, 16);
253         }
254         if (get_partition_info (&scsi_dev_desc[dev], part, &info)) {
255                 printf("error reading partinfo\n");
256                 return 1;
257         }
258         if ((strncmp((char *)(info.type), BOOT_PART_TYPE, sizeof(info.type)) != 0) &&
259             (strncmp((char *)(info.type), BOOT_PART_COMP, sizeof(info.type)) != 0)) {
260                 printf ("\n** Invalid partition type \"%.32s\""
261                         " (expect \"" BOOT_PART_TYPE "\")\n",
262                         info.type);
263                 return 1;
264         }
265
266         printf ("\nLoading from SCSI device %d, partition %d: "
267                 "Name: %.32s  Type: %.32s\n",
268                 dev, part, info.name, info.type);
269
270         debug ("First Block: %ld,  # of blocks: %ld, Block Size: %ld\n",
271                 info.start, info.size, info.blksz);
272
273         if (scsi_read (dev, info.start, 1, (ulong *)addr) != 1) {
274                 printf ("** Read error on %d:%d\n", dev, part);
275                 return 1;
276         }
277
278         switch (genimg_get_format ((void *)addr)) {
279         case IMAGE_FORMAT_LEGACY:
280                 hdr = (image_header_t *)addr;
281
282                 if (!image_check_hcrc (hdr)) {
283                         puts ("\n** Bad Header Checksum **\n");
284                         return 1;
285                 }
286
287                 image_print_contents (hdr);
288                 cnt = image_get_image_size (hdr);
289                 break;
290 #if defined(CONFIG_FIT)
291         case IMAGE_FORMAT_FIT:
292                 fit_hdr = (const void *)addr;
293                 puts ("Fit image detected...\n");
294
295                 cnt = fit_get_size (fit_hdr);
296                 break;
297 #endif
298         default:
299                 puts ("** Unknown image type\n");
300                 return 1;
301         }
302
303         cnt += info.blksz - 1;
304         cnt /= info.blksz;
305         cnt -= 1;
306
307         if (scsi_read (dev, info.start+1, cnt,
308                       (ulong *)(addr+info.blksz)) != cnt) {
309                 printf ("** Read error on %d:%d\n", dev, part);
310                 return 1;
311         }
312
313 #if defined(CONFIG_FIT)
314         /* This cannot be done earlier, we need complete FIT image in RAM first */
315         if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) {
316                 if (!fit_check_format (fit_hdr)) {
317                         puts ("** Bad FIT image format\n");
318                         return 1;
319                 }
320                 fit_print_contents (fit_hdr);
321         }
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 * const argv[])
345 {
346         switch (argc) {
347     case 0:
348     case 1:     return cmd_usage(cmdtp);
349
350     case 2:
351                         if (strncmp(argv[1],"res",3) == 0) {
352                                 printf("\nReset SCSI\n");
353                                 scsi_bus_reset();
354                                 scsi_scan(1);
355                                 return 0;
356                         }
357                         if (strncmp(argv[1],"inf",3) == 0) {
358                                 int i;
359                                 for (i=0; i<CONFIG_SYS_SCSI_MAX_DEVICE; ++i) {
360                                         if(scsi_dev_desc[i].type==DEV_TYPE_UNKNOWN)
361                                                 continue; /* list only known devices */
362                                         printf ("SCSI dev. %d:  ", i);
363                                         dev_print(&scsi_dev_desc[i]);
364                                 }
365                                 return 0;
366                         }
367                         if (strncmp(argv[1],"dev",3) == 0) {
368                                 if ((scsi_curr_dev < 0) || (scsi_curr_dev >= CONFIG_SYS_SCSI_MAX_DEVICE)) {
369                                         printf("\nno SCSI devices available\n");
370                                         return 1;
371                                 }
372                                 printf ("\n    Device %d: ", scsi_curr_dev);
373                                 dev_print(&scsi_dev_desc[scsi_curr_dev]);
374                                 return 0;
375                         }
376                         if (strncmp(argv[1],"scan",4) == 0) {
377                                 scsi_scan(1);
378                                 return 0;
379                         }
380                         if (strncmp(argv[1],"part",4) == 0) {
381                                 int dev, ok;
382                                 for (ok=0, dev=0; dev<CONFIG_SYS_SCSI_MAX_DEVICE; ++dev) {
383                                         if (scsi_dev_desc[dev].type!=DEV_TYPE_UNKNOWN) {
384                                                 ok++;
385                                                 if (dev)
386                                                         printf("\n");
387                                                 debug ("print_part of %x\n",dev);
388                                                         print_part(&scsi_dev_desc[dev]);
389                                         }
390                                 }
391                                 if (!ok)
392                                         printf("\nno SCSI devices available\n");
393                                 return 1;
394                         }
395                         return cmd_usage(cmdtp);
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 >= CONFIG_SYS_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                         return cmd_usage(cmdtp);
424     default:
425                         /* at least 4 args */
426                         if (strcmp(argv[1],"read") == 0) {
427                                 ulong addr = simple_strtoul(argv[2], NULL, 16);
428                                 ulong blk  = simple_strtoul(argv[3], NULL, 16);
429                                 ulong cnt  = simple_strtoul(argv[4], NULL, 16);
430                                 ulong n;
431                                 printf ("\nSCSI read: device %d block # %ld, count %ld ... ",
432                                                 scsi_curr_dev, blk, cnt);
433                                 n = scsi_read(scsi_curr_dev, blk, cnt, (ulong *)addr);
434                                 printf ("%ld blocks read: %s\n",n,(n==cnt) ? "OK" : "ERROR");
435                                 return 0;
436                         }
437         } /* switch */
438         return cmd_usage(cmdtp);
439 }
440
441 /****************************************************************************************
442  * scsi_read
443  */
444
445 #define SCSI_MAX_READ_BLK 0xFFFF /* almost the maximum amount of the scsi_ext command.. */
446
447 ulong scsi_read(int device, ulong blknr, ulong blkcnt, void *buffer)
448 {
449         ulong start,blks, buf_addr;
450         unsigned short smallblks;
451         ccb* pccb=(ccb *)&tempccb;
452         device&=0xff;
453         /* Setup  device
454          */
455         pccb->target=scsi_dev_desc[device].target;
456         pccb->lun=scsi_dev_desc[device].lun;
457         buf_addr=(unsigned long)buffer;
458         start=blknr;
459         blks=blkcnt;
460         debug ("\nscsi_read: dev %d startblk %lx, blccnt %lx buffer %lx\n",device,start,blks,(unsigned long)buffer);
461         do {
462                 pccb->pdata=(unsigned char *)buf_addr;
463                 if(blks>SCSI_MAX_READ_BLK) {
464                         pccb->datalen=scsi_dev_desc[device].blksz * SCSI_MAX_READ_BLK;
465                         smallblks=SCSI_MAX_READ_BLK;
466                         scsi_setup_read_ext(pccb,start,smallblks);
467                         start+=SCSI_MAX_READ_BLK;
468                         blks-=SCSI_MAX_READ_BLK;
469                 }
470                 else {
471                         pccb->datalen=scsi_dev_desc[device].blksz * blks;
472                         smallblks=(unsigned short) blks;
473                         scsi_setup_read_ext(pccb,start,smallblks);
474                         start+=blks;
475                         blks=0;
476                 }
477                 debug ("scsi_read_ext: startblk %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr);
478                 if(scsi_exec(pccb)!=TRUE) {
479                         scsi_print_error(pccb);
480                         blkcnt-=blks;
481                         break;
482                 }
483                 buf_addr+=pccb->datalen;
484         } while(blks!=0);
485         debug ("scsi_read_ext: end startblk %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr);
486         return(blkcnt);
487 }
488
489 /* copy src to dest, skipping leading and trailing blanks
490  * and null terminate the string
491  */
492 void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len)
493 {
494         int start,end;
495
496         start=0;
497         while(start<len) {
498                 if(src[start]!=' ')
499                         break;
500                 start++;
501         }
502         end=len-1;
503         while(end>start) {
504                 if(src[end]!=' ')
505                         break;
506                 end--;
507         }
508         for( ; start<=end; start++) {
509                 *dest++=src[start];
510         }
511         *dest='\0';
512 }
513
514
515 /* Trim trailing blanks, and NUL-terminate string
516  */
517 void scsi_trim_trail (unsigned char *str, unsigned int len)
518 {
519         unsigned char *p = str + len - 1;
520
521         while (len-- > 0) {
522                 *p-- = '\0';
523                 if (*p != ' ') {
524                         return;
525                 }
526         }
527 }
528
529
530 /************************************************************************************
531  * Some setup (fill-in) routines
532  */
533 void scsi_setup_test_unit_ready(ccb * pccb)
534 {
535         pccb->cmd[0]=SCSI_TST_U_RDY;
536         pccb->cmd[1]=pccb->lun<<5;
537         pccb->cmd[2]=0;
538         pccb->cmd[3]=0;
539         pccb->cmd[4]=0;
540         pccb->cmd[5]=0;
541         pccb->cmdlen=6;
542         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
543 }
544
545 void scsi_setup_read_capacity(ccb * pccb)
546 {
547         pccb->cmd[0]=SCSI_RD_CAPAC;
548         pccb->cmd[1]=pccb->lun<<5;
549         pccb->cmd[2]=0;
550         pccb->cmd[3]=0;
551         pccb->cmd[4]=0;
552         pccb->cmd[5]=0;
553         pccb->cmd[6]=0;
554         pccb->cmd[7]=0;
555         pccb->cmd[8]=0;
556         pccb->cmd[9]=0;
557         pccb->cmdlen=10;
558         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
559
560 }
561
562 void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks)
563 {
564         pccb->cmd[0]=SCSI_READ10;
565         pccb->cmd[1]=pccb->lun<<5;
566         pccb->cmd[2]=((unsigned char) (start>>24))&0xff;
567         pccb->cmd[3]=((unsigned char) (start>>16))&0xff;
568         pccb->cmd[4]=((unsigned char) (start>>8))&0xff;
569         pccb->cmd[5]=((unsigned char) (start))&0xff;
570         pccb->cmd[6]=0;
571         pccb->cmd[7]=((unsigned char) (blocks>>8))&0xff;
572         pccb->cmd[8]=(unsigned char) blocks & 0xff;
573         pccb->cmd[6]=0;
574         pccb->cmdlen=10;
575         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
576         debug ("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
577                 pccb->cmd[0],pccb->cmd[1],
578                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4],pccb->cmd[5],
579                 pccb->cmd[7],pccb->cmd[8]);
580 }
581
582 void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks)
583 {
584         pccb->cmd[0]=SCSI_READ6;
585         pccb->cmd[1]=pccb->lun<<5 | (((unsigned char)(start>>16))&0x1f);
586         pccb->cmd[2]=((unsigned char) (start>>8))&0xff;
587         pccb->cmd[3]=((unsigned char) (start))&0xff;
588         pccb->cmd[4]=(unsigned char) blocks & 0xff;
589         pccb->cmd[5]=0;
590         pccb->cmdlen=6;
591         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
592         debug ("scsi_setup_read6: cmd: %02X %02X startblk %02X%02X blccnt %02X\n",
593                 pccb->cmd[0],pccb->cmd[1],
594                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4]);
595 }
596
597
598 void scsi_setup_inquiry(ccb * pccb)
599 {
600         pccb->cmd[0]=SCSI_INQUIRY;
601         pccb->cmd[1]=pccb->lun<<5;
602         pccb->cmd[2]=0;
603         pccb->cmd[3]=0;
604         if(pccb->datalen>255)
605                 pccb->cmd[4]=255;
606         else
607                 pccb->cmd[4]=(unsigned char)pccb->datalen;
608         pccb->cmd[5]=0;
609         pccb->cmdlen=6;
610         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
611 }
612
613
614 U_BOOT_CMD(
615         scsi, 5, 1, do_scsi,
616         "SCSI sub-system",
617         "reset - reset SCSI controller\n"
618         "scsi info  - show available SCSI devices\n"
619         "scsi scan  - (re-)scan SCSI bus\n"
620         "scsi device [dev] - show or set current device\n"
621         "scsi part [dev] - print partition table of one or all SCSI devices\n"
622         "scsi read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
623         "     to memory address `addr'"
624 );
625
626 U_BOOT_CMD(
627         scsiboot, 3, 1, do_scsiboot,
628         "boot from SCSI device",
629         "loadAddr dev:part"
630 );