part/dev_desc: Add log2 of blocksize to block_dev_desc data struct
[karo-tx-uboot.git] / 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_DEV_LIST
38 #define SCSI_DEV_LIST CONFIG_SCSI_DEV_LIST
39 #else
40 #ifdef CONFIG_SCSI_SYM53C8XX
41 #define SCSI_VEND_ID    0x1000
42 #ifndef CONFIG_SCSI_DEV_ID
43 #define SCSI_DEV_ID             0x0001
44 #else
45 #define SCSI_DEV_ID             CONFIG_SCSI_DEV_ID
46 #endif
47 #elif defined CONFIG_SATA_ULI5288
48
49 #define SCSI_VEND_ID 0x10b9
50 #define SCSI_DEV_ID  0x5288
51
52 #elif !defined(CONFIG_SCSI_AHCI_PLAT)
53 #error no scsi device defined
54 #endif
55 #define SCSI_DEV_LIST {SCSI_VEND_ID, SCSI_DEV_ID}
56 #endif
57
58 #ifdef CONFIG_PCI
59 const struct pci_device_id scsi_device_list[] = { SCSI_DEV_LIST };
60 #endif
61 static ccb tempccb;     /* temporary scsi command buffer */
62
63 static unsigned char tempbuff[512]; /* temporary data buffer */
64
65 static int scsi_max_devs; /* number of highest available scsi device */
66
67 static int scsi_curr_dev; /* current device */
68
69 static block_dev_desc_t scsi_dev_desc[CONFIG_SYS_SCSI_MAX_DEVICE];
70
71 /********************************************************************************
72  *  forward declerations of some Setup Routines
73  */
74 void scsi_setup_test_unit_ready(ccb * pccb);
75 void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks);
76 void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks);
77 static void scsi_setup_write_ext(ccb *pccb, unsigned long start,
78                           unsigned short blocks);
79 void scsi_setup_inquiry(ccb * pccb);
80 void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len);
81
82
83 static int scsi_read_capacity(ccb *pccb, lbaint_t *capacity,
84                               unsigned long *blksz);
85 static ulong scsi_read(int device, ulong blknr, lbaint_t blkcnt, void *buffer);
86 static ulong scsi_write(int device, ulong blknr,
87                         lbaint_t blkcnt, const void *buffer);
88
89
90 /*********************************************************************************
91  * (re)-scan the scsi bus and reports scsi device info
92  * to the user if mode = 1
93  */
94 void scsi_scan(int mode)
95 {
96         unsigned char i,perq,modi,lun;
97         lbaint_t capacity;
98         unsigned long blksz;
99         ccb* pccb=(ccb *)&tempccb;
100
101         if(mode==1) {
102                 printf("scanning bus for devices...\n");
103         }
104         for(i=0;i<CONFIG_SYS_SCSI_MAX_DEVICE;i++) {
105                 scsi_dev_desc[i].target=0xff;
106                 scsi_dev_desc[i].lun=0xff;
107                 scsi_dev_desc[i].lba=0;
108                 scsi_dev_desc[i].blksz=0;
109                 scsi_dev_desc[i].log2blksz =
110                         LOG2_INVALID(typeof(scsi_dev_desc[i].log2blksz));
111                 scsi_dev_desc[i].type=DEV_TYPE_UNKNOWN;
112                 scsi_dev_desc[i].vendor[0]=0;
113                 scsi_dev_desc[i].product[0]=0;
114                 scsi_dev_desc[i].revision[0]=0;
115                 scsi_dev_desc[i].removable = false;
116                 scsi_dev_desc[i].if_type=IF_TYPE_SCSI;
117                 scsi_dev_desc[i].dev=i;
118                 scsi_dev_desc[i].part_type=PART_TYPE_UNKNOWN;
119                 scsi_dev_desc[i].block_read=scsi_read;
120                 scsi_dev_desc[i].block_write = scsi_write;
121         }
122         scsi_max_devs=0;
123         for(i=0;i<CONFIG_SYS_SCSI_MAX_SCSI_ID;i++) {
124                 pccb->target=i;
125                 for(lun=0;lun<CONFIG_SYS_SCSI_MAX_LUN;lun++) {
126                         pccb->lun=lun;
127                         pccb->pdata=(unsigned char *)&tempbuff;
128                         pccb->datalen=512;
129                         scsi_setup_inquiry(pccb);
130                         if (scsi_exec(pccb) != true) {
131                                 if(pccb->contr_stat==SCSI_SEL_TIME_OUT) {
132                                         debug ("Selection timeout ID %d\n",pccb->target);
133                                         continue; /* selection timeout => assuming no device present */
134                                 }
135                                 scsi_print_error(pccb);
136                                 continue;
137                         }
138                         perq=tempbuff[0];
139                         modi=tempbuff[1];
140                         if((perq & 0x1f)==0x1f) {
141                                 continue; /* skip unknown devices */
142                         }
143                         if((modi&0x80)==0x80) /* drive is removable */
144                                 scsi_dev_desc[scsi_max_devs].removable=true;
145                         /* get info for this device */
146                         scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].vendor[0],
147                                        &tempbuff[8], 8);
148                         scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].product[0],
149                                        &tempbuff[16], 16);
150                         scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].revision[0],
151                                        &tempbuff[32], 4);
152                         scsi_dev_desc[scsi_max_devs].target=pccb->target;
153                         scsi_dev_desc[scsi_max_devs].lun=pccb->lun;
154
155                         pccb->datalen=0;
156                         scsi_setup_test_unit_ready(pccb);
157                         if (scsi_exec(pccb) != true) {
158                                 if (scsi_dev_desc[scsi_max_devs].removable == true) {
159                                         scsi_dev_desc[scsi_max_devs].type=perq;
160                                         goto removable;
161                                 }
162                                 scsi_print_error(pccb);
163                                 continue;
164                         }
165                         if (scsi_read_capacity(pccb, &capacity, &blksz)) {
166                                 scsi_print_error(pccb);
167                                 continue;
168                         }
169                         scsi_dev_desc[scsi_max_devs].lba=capacity;
170                         scsi_dev_desc[scsi_max_devs].blksz=blksz;
171                         scsi_dev_desc[scsi_max_devs].log2blksz =
172                                 LOG2(scsi_dev_desc[scsi_max_devs].blksz);
173                         scsi_dev_desc[scsi_max_devs].type=perq;
174                         init_part(&scsi_dev_desc[scsi_max_devs]);
175 removable:
176                         if(mode==1) {
177                                 printf ("  Device %d: ", scsi_max_devs);
178                                 dev_print(&scsi_dev_desc[scsi_max_devs]);
179                         } /* if mode */
180                         scsi_max_devs++;
181                 } /* next LUN */
182         }
183         if(scsi_max_devs>0)
184                 scsi_curr_dev=0;
185         else
186                 scsi_curr_dev = -1;
187
188         printf("Found %d device(s).\n", scsi_max_devs);
189         setenv_ulong("scsidevs", scsi_max_devs);
190 }
191
192 int scsi_get_disk_count(void)
193 {
194         return scsi_max_devs;
195 }
196
197 #ifdef CONFIG_PCI
198 void scsi_init(void)
199 {
200         int busdevfunc;
201         int i;
202         /*
203          * Find a device from the list, this driver will support a single
204          * controller.
205          */
206         for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
207                 /* get PCI Device ID */
208                 busdevfunc = pci_find_device(scsi_device_list[i].vendor,
209                                              scsi_device_list[i].device,
210                                              0);
211                 if (busdevfunc != -1)
212                         break;
213         }
214
215         if (busdevfunc == -1) {
216                 printf("Error: SCSI Controller(s) ");
217                 for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
218                         printf("%04X:%04X ",
219                                scsi_device_list[i].vendor,
220                                scsi_device_list[i].device);
221                 }
222                 printf("not found\n");
223                 return;
224         }
225 #ifdef DEBUG
226         else {
227                 printf("SCSI Controller (%04X,%04X) found (%d:%d:%d)\n",
228                        scsi_device_list[i].vendor,
229                        scsi_device_list[i].device,
230                        (busdevfunc >> 16) & 0xFF,
231                        (busdevfunc >> 11) & 0x1F,
232                        (busdevfunc >> 8) & 0x7);
233         }
234 #endif
235         scsi_low_level_init(busdevfunc);
236         scsi_scan(1);
237 }
238 #endif
239
240 #ifdef CONFIG_PARTITIONS
241 block_dev_desc_t * scsi_get_dev(int dev)
242 {
243         return (dev < CONFIG_SYS_SCSI_MAX_DEVICE) ? &scsi_dev_desc[dev] : NULL;
244 }
245 #endif
246
247 /******************************************************************************
248  * scsi boot command intepreter. Derived from diskboot
249  */
250 int do_scsiboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
251 {
252         return common_diskboot(cmdtp, "scsi", argc, argv);
253 }
254
255 /*********************************************************************************
256  * scsi command intepreter
257  */
258 int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
259 {
260         switch (argc) {
261         case 0:
262         case 1:
263                 return CMD_RET_USAGE;
264
265         case 2:
266                         if (strncmp(argv[1],"res",3) == 0) {
267                                 printf("\nReset SCSI\n");
268                                 scsi_bus_reset();
269                                 scsi_scan(1);
270                                 return 0;
271                         }
272                         if (strncmp(argv[1],"inf",3) == 0) {
273                                 int i;
274                                 for (i=0; i<CONFIG_SYS_SCSI_MAX_DEVICE; ++i) {
275                                         if(scsi_dev_desc[i].type==DEV_TYPE_UNKNOWN)
276                                                 continue; /* list only known devices */
277                                         printf ("SCSI dev. %d:  ", i);
278                                         dev_print(&scsi_dev_desc[i]);
279                                 }
280                                 return 0;
281                         }
282                         if (strncmp(argv[1],"dev",3) == 0) {
283                                 if ((scsi_curr_dev < 0) || (scsi_curr_dev >= CONFIG_SYS_SCSI_MAX_DEVICE)) {
284                                         printf("\nno SCSI devices available\n");
285                                         return 1;
286                                 }
287                                 printf ("\n    Device %d: ", scsi_curr_dev);
288                                 dev_print(&scsi_dev_desc[scsi_curr_dev]);
289                                 return 0;
290                         }
291                         if (strncmp(argv[1],"scan",4) == 0) {
292                                 scsi_scan(1);
293                                 return 0;
294                         }
295                         if (strncmp(argv[1],"part",4) == 0) {
296                                 int dev, ok;
297                                 for (ok=0, dev=0; dev<CONFIG_SYS_SCSI_MAX_DEVICE; ++dev) {
298                                         if (scsi_dev_desc[dev].type!=DEV_TYPE_UNKNOWN) {
299                                                 ok++;
300                                                 if (dev)
301                                                         printf("\n");
302                                                 debug ("print_part of %x\n",dev);
303                                                         print_part(&scsi_dev_desc[dev]);
304                                         }
305                                 }
306                                 if (!ok)
307                                         printf("\nno SCSI devices available\n");
308                                 return 1;
309                         }
310                         return CMD_RET_USAGE;
311         case 3:
312                         if (strncmp(argv[1],"dev",3) == 0) {
313                                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
314                                 printf ("\nSCSI device %d: ", dev);
315                                 if (dev >= CONFIG_SYS_SCSI_MAX_DEVICE) {
316                                         printf("unknown device\n");
317                                         return 1;
318                                 }
319                                 printf ("\n    Device %d: ", dev);
320                                 dev_print(&scsi_dev_desc[dev]);
321                                 if(scsi_dev_desc[dev].type == DEV_TYPE_UNKNOWN) {
322                                         return 1;
323                                 }
324                                 scsi_curr_dev = dev;
325                                 printf("... is now current device\n");
326                                 return 0;
327                         }
328                         if (strncmp(argv[1],"part",4) == 0) {
329                                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
330                                 if(scsi_dev_desc[dev].type != DEV_TYPE_UNKNOWN) {
331                                         print_part(&scsi_dev_desc[dev]);
332                                 }
333                                 else {
334                                         printf ("\nSCSI device %d not available\n", dev);
335                                 }
336                                 return 1;
337                         }
338                         return CMD_RET_USAGE;
339     default:
340                         /* at least 4 args */
341                         if (strcmp(argv[1],"read") == 0) {
342                                 ulong addr = simple_strtoul(argv[2], NULL, 16);
343                                 ulong blk  = simple_strtoul(argv[3], NULL, 16);
344                                 ulong cnt  = simple_strtoul(argv[4], NULL, 16);
345                                 ulong n;
346                                 printf ("\nSCSI read: device %d block # %ld, count %ld ... ",
347                                                 scsi_curr_dev, blk, cnt);
348                                 n = scsi_read(scsi_curr_dev, blk, cnt, (ulong *)addr);
349                                 printf ("%ld blocks read: %s\n",n,(n==cnt) ? "OK" : "ERROR");
350                                 return 0;
351                         } else if (strcmp(argv[1], "write") == 0) {
352                                 ulong addr = simple_strtoul(argv[2], NULL, 16);
353                                 ulong blk = simple_strtoul(argv[3], NULL, 16);
354                                 ulong cnt = simple_strtoul(argv[4], NULL, 16);
355                                 ulong n;
356                                 printf("\nSCSI write: device %d block # %ld, "
357                                        "count %ld ... ",
358                                        scsi_curr_dev, blk, cnt);
359                                 n = scsi_write(scsi_curr_dev, blk, cnt,
360                                                (ulong *)addr);
361                                 printf("%ld blocks written: %s\n", n,
362                                        (n == cnt) ? "OK" : "ERROR");
363                                 return 0;
364                         }
365         } /* switch */
366         return CMD_RET_USAGE;
367 }
368
369 /****************************************************************************************
370  * scsi_read
371  */
372
373 #define SCSI_MAX_READ_BLK 0xFFFF /* almost the maximum amount of the scsi_ext command.. */
374
375 static ulong scsi_read(int device, ulong blknr, lbaint_t blkcnt, void *buffer)
376 {
377         lbaint_t start, blks;
378         uintptr_t buf_addr;
379         unsigned short smallblks;
380         ccb* pccb=(ccb *)&tempccb;
381         device&=0xff;
382         /* Setup  device
383          */
384         pccb->target=scsi_dev_desc[device].target;
385         pccb->lun=scsi_dev_desc[device].lun;
386         buf_addr=(unsigned long)buffer;
387         start=blknr;
388         blks=blkcnt;
389         debug("\nscsi_read: dev %d startblk " LBAF
390               ", blccnt " LBAF " buffer %lx\n",
391               device, start, blks, (unsigned long)buffer);
392         do {
393                 pccb->pdata=(unsigned char *)buf_addr;
394                 if(blks>SCSI_MAX_READ_BLK) {
395                         pccb->datalen=scsi_dev_desc[device].blksz * SCSI_MAX_READ_BLK;
396                         smallblks=SCSI_MAX_READ_BLK;
397                         scsi_setup_read_ext(pccb,start,smallblks);
398                         start+=SCSI_MAX_READ_BLK;
399                         blks-=SCSI_MAX_READ_BLK;
400                 }
401                 else {
402                         pccb->datalen=scsi_dev_desc[device].blksz * blks;
403                         smallblks=(unsigned short) blks;
404                         scsi_setup_read_ext(pccb,start,smallblks);
405                         start+=blks;
406                         blks=0;
407                 }
408                 debug("scsi_read_ext: startblk " LBAF
409                       ", blccnt %x buffer %lx\n",
410                       start, smallblks, buf_addr);
411                 if (scsi_exec(pccb) != true) {
412                         scsi_print_error(pccb);
413                         blkcnt-=blks;
414                         break;
415                 }
416                 buf_addr+=pccb->datalen;
417         } while(blks!=0);
418         debug("scsi_read_ext: end startblk " LBAF
419               ", blccnt %x buffer %lx\n", start, smallblks, buf_addr);
420         return(blkcnt);
421 }
422
423 /*******************************************************************************
424  * scsi_write
425  */
426
427 /* Almost the maximum amount of the scsi_ext command.. */
428 #define SCSI_MAX_WRITE_BLK 0xFFFF
429
430 static ulong scsi_write(int device, ulong blknr,
431                         lbaint_t blkcnt, const void *buffer)
432 {
433         lbaint_t start, blks;
434         uintptr_t buf_addr;
435         unsigned short smallblks;
436         ccb* pccb = (ccb *)&tempccb;
437         device &= 0xff;
438         /* Setup  device
439          */
440         pccb->target = scsi_dev_desc[device].target;
441         pccb->lun = scsi_dev_desc[device].lun;
442         buf_addr = (unsigned long)buffer;
443         start = blknr;
444         blks = blkcnt;
445         debug("\n%s: dev %d startblk " LBAF ", blccnt " LBAF " buffer %lx\n",
446               __func__, device, start, blks, (unsigned long)buffer);
447         do {
448                 pccb->pdata = (unsigned char *)buf_addr;
449                 if (blks > SCSI_MAX_WRITE_BLK) {
450                         pccb->datalen = (scsi_dev_desc[device].blksz *
451                                          SCSI_MAX_WRITE_BLK);
452                         smallblks = SCSI_MAX_WRITE_BLK;
453                         scsi_setup_write_ext(pccb, start, smallblks);
454                         start += SCSI_MAX_WRITE_BLK;
455                         blks -= SCSI_MAX_WRITE_BLK;
456                 } else {
457                         pccb->datalen = scsi_dev_desc[device].blksz * blks;
458                         smallblks = (unsigned short)blks;
459                         scsi_setup_write_ext(pccb, start, smallblks);
460                         start += blks;
461                         blks = 0;
462                 }
463                 debug("%s: startblk " LBAF ", blccnt %x buffer %lx\n",
464                       __func__, start, smallblks, buf_addr);
465                 if (scsi_exec(pccb) != true) {
466                         scsi_print_error(pccb);
467                         blkcnt -= blks;
468                         break;
469                 }
470                 buf_addr += pccb->datalen;
471         } while (blks != 0);
472         debug("%s: end startblk " LBAF ", blccnt %x buffer %lx\n",
473               __func__, start, smallblks, buf_addr);
474         return blkcnt;
475 }
476
477 /* copy src to dest, skipping leading and trailing blanks
478  * and null terminate the string
479  */
480 void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len)
481 {
482         int start,end;
483
484         start=0;
485         while(start<len) {
486                 if(src[start]!=' ')
487                         break;
488                 start++;
489         }
490         end=len-1;
491         while(end>start) {
492                 if(src[end]!=' ')
493                         break;
494                 end--;
495         }
496         for( ; start<=end; start++) {
497                 *dest++=src[start];
498         }
499         *dest='\0';
500 }
501
502
503 /* Trim trailing blanks, and NUL-terminate string
504  */
505 void scsi_trim_trail (unsigned char *str, unsigned int len)
506 {
507         unsigned char *p = str + len - 1;
508
509         while (len-- > 0) {
510                 *p-- = '\0';
511                 if (*p != ' ') {
512                         return;
513                 }
514         }
515 }
516
517 int scsi_read_capacity(ccb *pccb, lbaint_t *capacity, unsigned long *blksz)
518 {
519         *capacity = 0;
520
521         memset(pccb->cmd, 0, sizeof(pccb->cmd));
522         pccb->cmd[0] = SCSI_RD_CAPAC10;
523         pccb->cmd[1] = pccb->lun << 5;
524         pccb->cmdlen = 10;
525         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
526
527         pccb->datalen = 8;
528         if (scsi_exec(pccb) != true)
529                 return 1;
530
531         *capacity = ((lbaint_t)pccb->pdata[0] << 24) |
532                     ((lbaint_t)pccb->pdata[1] << 16) |
533                     ((lbaint_t)pccb->pdata[2] << 8)  |
534                     ((lbaint_t)pccb->pdata[3]);
535
536         if (*capacity != 0xffffffff) {
537                 /* Read capacity (10) was sufficient for this drive. */
538                 *blksz = ((unsigned long)pccb->pdata[4] << 24) |
539                          ((unsigned long)pccb->pdata[5] << 16) |
540                          ((unsigned long)pccb->pdata[6] << 8)  |
541                          ((unsigned long)pccb->pdata[7]);
542                 return 0;
543         }
544
545         /* Read capacity (10) was insufficient. Use read capacity (16). */
546
547         memset(pccb->cmd, 0, sizeof(pccb->cmd));
548         pccb->cmd[0] = SCSI_RD_CAPAC16;
549         pccb->cmd[1] = 0x10;
550         pccb->cmdlen = 16;
551         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
552
553         pccb->datalen = 16;
554         if (scsi_exec(pccb) != true)
555                 return 1;
556
557         *capacity = ((uint64_t)pccb->pdata[0] << 56) |
558                     ((uint64_t)pccb->pdata[1] << 48) |
559                     ((uint64_t)pccb->pdata[2] << 40) |
560                     ((uint64_t)pccb->pdata[3] << 32) |
561                     ((uint64_t)pccb->pdata[4] << 24) |
562                     ((uint64_t)pccb->pdata[5] << 16) |
563                     ((uint64_t)pccb->pdata[6] << 8)  |
564                     ((uint64_t)pccb->pdata[7]);
565
566         *blksz = ((uint64_t)pccb->pdata[8]  << 56) |
567                  ((uint64_t)pccb->pdata[9]  << 48) |
568                  ((uint64_t)pccb->pdata[10] << 40) |
569                  ((uint64_t)pccb->pdata[11] << 32) |
570                  ((uint64_t)pccb->pdata[12] << 24) |
571                  ((uint64_t)pccb->pdata[13] << 16) |
572                  ((uint64_t)pccb->pdata[14] << 8)  |
573                  ((uint64_t)pccb->pdata[15]);
574
575         return 0;
576 }
577
578
579 /************************************************************************************
580  * Some setup (fill-in) routines
581  */
582 void scsi_setup_test_unit_ready(ccb * pccb)
583 {
584         pccb->cmd[0]=SCSI_TST_U_RDY;
585         pccb->cmd[1]=pccb->lun<<5;
586         pccb->cmd[2]=0;
587         pccb->cmd[3]=0;
588         pccb->cmd[4]=0;
589         pccb->cmd[5]=0;
590         pccb->cmdlen=6;
591         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
592 }
593
594 void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks)
595 {
596         pccb->cmd[0]=SCSI_READ10;
597         pccb->cmd[1]=pccb->lun<<5;
598         pccb->cmd[2]=((unsigned char) (start>>24))&0xff;
599         pccb->cmd[3]=((unsigned char) (start>>16))&0xff;
600         pccb->cmd[4]=((unsigned char) (start>>8))&0xff;
601         pccb->cmd[5]=((unsigned char) (start))&0xff;
602         pccb->cmd[6]=0;
603         pccb->cmd[7]=((unsigned char) (blocks>>8))&0xff;
604         pccb->cmd[8]=(unsigned char) blocks & 0xff;
605         pccb->cmd[6]=0;
606         pccb->cmdlen=10;
607         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
608         debug ("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
609                 pccb->cmd[0],pccb->cmd[1],
610                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4],pccb->cmd[5],
611                 pccb->cmd[7],pccb->cmd[8]);
612 }
613
614 void scsi_setup_write_ext(ccb *pccb, unsigned long start, unsigned short blocks)
615 {
616         pccb->cmd[0] = SCSI_WRITE10;
617         pccb->cmd[1] = pccb->lun << 5;
618         pccb->cmd[2] = ((unsigned char) (start>>24)) & 0xff;
619         pccb->cmd[3] = ((unsigned char) (start>>16)) & 0xff;
620         pccb->cmd[4] = ((unsigned char) (start>>8)) & 0xff;
621         pccb->cmd[5] = ((unsigned char) (start)) & 0xff;
622         pccb->cmd[6] = 0;
623         pccb->cmd[7] = ((unsigned char) (blocks>>8)) & 0xff;
624         pccb->cmd[8] = (unsigned char)blocks & 0xff;
625         pccb->cmd[9] = 0;
626         pccb->cmdlen = 10;
627         pccb->msgout[0] = SCSI_IDENTIFY;  /* NOT USED */
628         debug("%s: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
629               __func__,
630               pccb->cmd[0], pccb->cmd[1],
631               pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
632               pccb->cmd[7], pccb->cmd[8]);
633 }
634
635 void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks)
636 {
637         pccb->cmd[0]=SCSI_READ6;
638         pccb->cmd[1]=pccb->lun<<5 | (((unsigned char)(start>>16))&0x1f);
639         pccb->cmd[2]=((unsigned char) (start>>8))&0xff;
640         pccb->cmd[3]=((unsigned char) (start))&0xff;
641         pccb->cmd[4]=(unsigned char) blocks & 0xff;
642         pccb->cmd[5]=0;
643         pccb->cmdlen=6;
644         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
645         debug ("scsi_setup_read6: cmd: %02X %02X startblk %02X%02X blccnt %02X\n",
646                 pccb->cmd[0],pccb->cmd[1],
647                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4]);
648 }
649
650
651 void scsi_setup_inquiry(ccb * pccb)
652 {
653         pccb->cmd[0]=SCSI_INQUIRY;
654         pccb->cmd[1]=pccb->lun<<5;
655         pccb->cmd[2]=0;
656         pccb->cmd[3]=0;
657         if(pccb->datalen>255)
658                 pccb->cmd[4]=255;
659         else
660                 pccb->cmd[4]=(unsigned char)pccb->datalen;
661         pccb->cmd[5]=0;
662         pccb->cmdlen=6;
663         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
664 }
665
666
667 U_BOOT_CMD(
668         scsi, 5, 1, do_scsi,
669         "SCSI sub-system",
670         "reset - reset SCSI controller\n"
671         "scsi info  - show available SCSI devices\n"
672         "scsi scan  - (re-)scan SCSI bus\n"
673         "scsi device [dev] - show or set current device\n"
674         "scsi part [dev] - print partition table of one or all SCSI devices\n"
675         "scsi read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
676         "     to memory address `addr'\n"
677         "scsi write addr blk# cnt - write `cnt' blocks starting at block\n"
678         "     `blk#' from memory address `addr'"
679 );
680
681 U_BOOT_CMD(
682         scsiboot, 3, 1, do_scsiboot,
683         "boot from SCSI device",
684         "loadAddr dev:part"
685 );