1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2001
4 * Denis Peter, MPL AG Switzerland
5 */
6
7 #include <common.h>
8 #include <blk.h>
9 #include <bootstage.h>
10 #include <dm.h>
11 #include <env.h>
12 #include <log.h>
13 #include <part.h>
14 #include <pci.h>
15 #include <scsi.h>
16 #include <dm/device-internal.h>
17 #include <dm/uclass-internal.h>
18
19 #if !defined(CONFIG_DM_SCSI)
20 # ifdef CONFIG_SCSI_DEV_LIST
21 # define SCSI_DEV_LIST CONFIG_SCSI_DEV_LIST
22 # else
23 # ifdef CONFIG_SATA_ULI5288
24
25 # define SCSI_VEND_ID 0x10b9
26 # define SCSI_DEV_ID 0x5288
27
28 # elif !defined(CONFIG_SCSI_AHCI_PLAT)
29 # error no scsi device defined
30 # endif
31 # define SCSI_DEV_LIST {SCSI_VEND_ID, SCSI_DEV_ID}
32 # endif
33 #endif
34
35 #if defined(CONFIG_PCI) && !defined(CONFIG_SCSI_AHCI_PLAT) && \
36 !defined(CONFIG_DM_SCSI)
37 const struct pci_device_id scsi_device_list[] = { SCSI_DEV_LIST };
38 #endif
39 static struct scsi_cmd tempccb; /* temporary scsi command buffer */
40
41 static unsigned char tempbuff[512]; /* temporary data buffer */
42
43 #if !defined(CONFIG_DM_SCSI)
44 static int scsi_max_devs; /* number of highest available scsi device */
45
46 static int scsi_curr_dev; /* current device */
47
48 static struct blk_desc scsi_dev_desc[CONFIG_SYS_SCSI_MAX_DEVICE];
49 #endif
50
51 /* almost the maximum amount of the scsi_ext command.. */
52 #define SCSI_MAX_BLK 0xFFFF
53 #define SCSI_LBA48_READ 0xFFFFFFF
54
scsi_print_error(struct scsi_cmd * pccb)55 static void scsi_print_error(struct scsi_cmd *pccb)
56 {
57 /* Dummy function that could print an error for debugging */
58 }
59
60 #ifdef CONFIG_SYS_64BIT_LBA
scsi_setup_read16(struct scsi_cmd * pccb,lbaint_t start,unsigned long blocks)61 void scsi_setup_read16(struct scsi_cmd *pccb, lbaint_t start,
62 unsigned long blocks)
63 {
64 pccb->cmd[0] = SCSI_READ16;
65 pccb->cmd[1] = pccb->lun << 5;
66 pccb->cmd[2] = (unsigned char)(start >> 56) & 0xff;
67 pccb->cmd[3] = (unsigned char)(start >> 48) & 0xff;
68 pccb->cmd[4] = (unsigned char)(start >> 40) & 0xff;
69 pccb->cmd[5] = (unsigned char)(start >> 32) & 0xff;
70 pccb->cmd[6] = (unsigned char)(start >> 24) & 0xff;
71 pccb->cmd[7] = (unsigned char)(start >> 16) & 0xff;
72 pccb->cmd[8] = (unsigned char)(start >> 8) & 0xff;
73 pccb->cmd[9] = (unsigned char)start & 0xff;
74 pccb->cmd[10] = 0;
75 pccb->cmd[11] = (unsigned char)(blocks >> 24) & 0xff;
76 pccb->cmd[12] = (unsigned char)(blocks >> 16) & 0xff;
77 pccb->cmd[13] = (unsigned char)(blocks >> 8) & 0xff;
78 pccb->cmd[14] = (unsigned char)blocks & 0xff;
79 pccb->cmd[15] = 0;
80 pccb->cmdlen = 16;
81 pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
82 debug("scsi_setup_read16: cmd: %02X %02X startblk %02X%02X%02X%02X%02X%02X%02X%02X blccnt %02X%02X%02X%02X\n",
83 pccb->cmd[0], pccb->cmd[1],
84 pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
85 pccb->cmd[6], pccb->cmd[7], pccb->cmd[8], pccb->cmd[9],
86 pccb->cmd[11], pccb->cmd[12], pccb->cmd[13], pccb->cmd[14]);
87 }
88 #endif
89
scsi_setup_inquiry(struct scsi_cmd * pccb)90 static void scsi_setup_inquiry(struct scsi_cmd *pccb)
91 {
92 pccb->cmd[0] = SCSI_INQUIRY;
93 pccb->cmd[1] = pccb->lun << 5;
94 pccb->cmd[2] = 0;
95 pccb->cmd[3] = 0;
96 if (pccb->datalen > 255)
97 pccb->cmd[4] = 255;
98 else
99 pccb->cmd[4] = (unsigned char)pccb->datalen;
100 pccb->cmd[5] = 0;
101 pccb->cmdlen = 6;
102 pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
103 }
104
105 #ifdef CONFIG_BLK
scsi_setup_read_ext(struct scsi_cmd * pccb,lbaint_t start,unsigned short blocks)106 static void scsi_setup_read_ext(struct scsi_cmd *pccb, lbaint_t start,
107 unsigned short blocks)
108 {
109 pccb->cmd[0] = SCSI_READ10;
110 pccb->cmd[1] = pccb->lun << 5;
111 pccb->cmd[2] = (unsigned char)(start >> 24) & 0xff;
112 pccb->cmd[3] = (unsigned char)(start >> 16) & 0xff;
113 pccb->cmd[4] = (unsigned char)(start >> 8) & 0xff;
114 pccb->cmd[5] = (unsigned char)start & 0xff;
115 pccb->cmd[6] = 0;
116 pccb->cmd[7] = (unsigned char)(blocks >> 8) & 0xff;
117 pccb->cmd[8] = (unsigned char)blocks & 0xff;
118 pccb->cmd[6] = 0;
119 pccb->cmdlen = 10;
120 pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
121 debug("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
122 pccb->cmd[0], pccb->cmd[1],
123 pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
124 pccb->cmd[7], pccb->cmd[8]);
125 }
126
scsi_setup_write_ext(struct scsi_cmd * pccb,lbaint_t start,unsigned short blocks)127 static void scsi_setup_write_ext(struct scsi_cmd *pccb, lbaint_t start,
128 unsigned short blocks)
129 {
130 pccb->cmd[0] = SCSI_WRITE10;
131 pccb->cmd[1] = pccb->lun << 5;
132 pccb->cmd[2] = (unsigned char)(start >> 24) & 0xff;
133 pccb->cmd[3] = (unsigned char)(start >> 16) & 0xff;
134 pccb->cmd[4] = (unsigned char)(start >> 8) & 0xff;
135 pccb->cmd[5] = (unsigned char)start & 0xff;
136 pccb->cmd[6] = 0;
137 pccb->cmd[7] = ((unsigned char)(blocks >> 8)) & 0xff;
138 pccb->cmd[8] = (unsigned char)blocks & 0xff;
139 pccb->cmd[9] = 0;
140 pccb->cmdlen = 10;
141 pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
142 debug("%s: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
143 __func__,
144 pccb->cmd[0], pccb->cmd[1],
145 pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
146 pccb->cmd[7], pccb->cmd[8]);
147 }
148
scsi_read(struct udevice * dev,lbaint_t blknr,lbaint_t blkcnt,void * buffer)149 static ulong scsi_read(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
150 void *buffer)
151 {
152 struct blk_desc *block_dev = dev_get_uclass_plat(dev);
153 struct udevice *bdev = dev->parent;
154 struct scsi_plat *uc_plat = dev_get_uclass_plat(bdev);
155 lbaint_t start, blks, max_blks;
156 uintptr_t buf_addr;
157 unsigned short smallblks = 0;
158 struct scsi_cmd *pccb = (struct scsi_cmd *)&tempccb;
159
160 /* Setup device */
161 pccb->target = block_dev->target;
162 pccb->lun = block_dev->lun;
163 buf_addr = (unsigned long)buffer;
164 start = blknr;
165 blks = blkcnt;
166 if (uc_plat->max_bytes_per_req)
167 max_blks = uc_plat->max_bytes_per_req / block_dev->blksz;
168 else
169 max_blks = SCSI_MAX_BLK;
170
171 debug("\nscsi_read: dev %d startblk " LBAF
172 ", blccnt " LBAF " buffer %lx\n",
173 block_dev->devnum, start, blks, (unsigned long)buffer);
174 do {
175 pccb->pdata = (unsigned char *)buf_addr;
176 pccb->dma_dir = DMA_FROM_DEVICE;
177 #ifdef CONFIG_SYS_64BIT_LBA
178 if (start > SCSI_LBA48_READ) {
179 unsigned long blocks;
180 blocks = min_t(lbaint_t, blks, max_blks);
181 pccb->datalen = block_dev->blksz * blocks;
182 scsi_setup_read16(pccb, start, blocks);
183 start += blocks;
184 blks -= blocks;
185 } else
186 #endif
187 if (blks > max_blks) {
188 pccb->datalen = block_dev->blksz * max_blks;
189 smallblks = max_blks;
190 scsi_setup_read_ext(pccb, start, smallblks);
191 start += max_blks;
192 blks -= max_blks;
193 } else {
194 pccb->datalen = block_dev->blksz * blks;
195 smallblks = (unsigned short)blks;
196 scsi_setup_read_ext(pccb, start, smallblks);
197 start += blks;
198 blks = 0;
199 }
200 debug("scsi_read_ext: startblk " LBAF
201 ", blccnt %x buffer %lX\n",
202 start, smallblks, buf_addr);
203 if (scsi_exec(bdev, pccb)) {
204 scsi_print_error(pccb);
205 blkcnt -= blks;
206 break;
207 }
208 buf_addr += pccb->datalen;
209 } while (blks != 0);
210 debug("scsi_read_ext: end startblk " LBAF
211 ", blccnt %x buffer %lX\n", start, smallblks, buf_addr);
212 return blkcnt;
213 }
214
215 /*******************************************************************************
216 * scsi_write
217 */
218
scsi_write(struct udevice * dev,lbaint_t blknr,lbaint_t blkcnt,const void * buffer)219 static ulong scsi_write(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
220 const void *buffer)
221 {
222 struct blk_desc *block_dev = dev_get_uclass_plat(dev);
223 struct udevice *bdev = dev->parent;
224 struct scsi_plat *uc_plat = dev_get_uclass_plat(bdev);
225 lbaint_t start, blks, max_blks;
226 uintptr_t buf_addr;
227 unsigned short smallblks;
228 struct scsi_cmd *pccb = (struct scsi_cmd *)&tempccb;
229
230 /* Setup device */
231 pccb->target = block_dev->target;
232 pccb->lun = block_dev->lun;
233 buf_addr = (unsigned long)buffer;
234 start = blknr;
235 blks = blkcnt;
236 if (uc_plat->max_bytes_per_req)
237 max_blks = uc_plat->max_bytes_per_req / block_dev->blksz;
238 else
239 max_blks = SCSI_MAX_BLK;
240
241 debug("\n%s: dev %d startblk " LBAF ", blccnt " LBAF " buffer %lx\n",
242 __func__, block_dev->devnum, start, blks, (unsigned long)buffer);
243 do {
244 pccb->pdata = (unsigned char *)buf_addr;
245 pccb->dma_dir = DMA_TO_DEVICE;
246 if (blks > max_blks) {
247 pccb->datalen = block_dev->blksz * max_blks;
248 smallblks = max_blks;
249 scsi_setup_write_ext(pccb, start, smallblks);
250 start += max_blks;
251 blks -= max_blks;
252 } else {
253 pccb->datalen = block_dev->blksz * blks;
254 smallblks = (unsigned short)blks;
255 scsi_setup_write_ext(pccb, start, smallblks);
256 start += blks;
257 blks = 0;
258 }
259 debug("%s: startblk " LBAF ", blccnt %x buffer %lx\n",
260 __func__, start, smallblks, buf_addr);
261 if (scsi_exec(bdev, pccb)) {
262 scsi_print_error(pccb);
263 blkcnt -= blks;
264 break;
265 }
266 buf_addr += pccb->datalen;
267 } while (blks != 0);
268 debug("%s: end startblk " LBAF ", blccnt %x buffer %lX\n",
269 __func__, start, smallblks, buf_addr);
270 return blkcnt;
271 }
272 #endif
273
274 #if defined(CONFIG_PCI) && !defined(CONFIG_SCSI_AHCI_PLAT) && \
275 !defined(CONFIG_DM_SCSI)
scsi_init(void)276 void scsi_init(void)
277 {
278 int busdevfunc = -1;
279 int i;
280 /*
281 * Find a device from the list, this driver will support a single
282 * controller.
283 */
284 for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
285 /* get PCI Device ID */
286 #ifdef CONFIG_DM_PCI
287 struct udevice *dev;
288 int ret;
289
290 ret = dm_pci_find_device(scsi_device_list[i].vendor,
291 scsi_device_list[i].device, 0, &dev);
292 if (!ret) {
293 busdevfunc = dm_pci_get_bdf(dev);
294 break;
295 }
296 #else
297 busdevfunc = pci_find_device(scsi_device_list[i].vendor,
298 scsi_device_list[i].device,
299 0);
300 #endif
301 if (busdevfunc != -1)
302 break;
303 }
304
305 if (busdevfunc == -1) {
306 printf("Error: SCSI Controller(s) ");
307 for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
308 printf("%04X:%04X ",
309 scsi_device_list[i].vendor,
310 scsi_device_list[i].device);
311 }
312 printf("not found\n");
313 return;
314 }
315 #ifdef DEBUG
316 else {
317 printf("SCSI Controller (%04X,%04X) found (%d:%d:%d)\n",
318 scsi_device_list[i].vendor,
319 scsi_device_list[i].device,
320 (busdevfunc >> 16) & 0xFF,
321 (busdevfunc >> 11) & 0x1F,
322 (busdevfunc >> 8) & 0x7);
323 }
324 #endif
325 bootstage_start(BOOTSTAGE_ID_ACCUM_SCSI, "ahci");
326 scsi_low_level_init(busdevfunc);
327 scsi_scan(true);
328 bootstage_accum(BOOTSTAGE_ID_ACCUM_SCSI);
329 }
330 #endif
331
332 /* copy src to dest, skipping leading and trailing blanks
333 * and null terminate the string
334 */
scsi_ident_cpy(unsigned char * dest,unsigned char * src,unsigned int len)335 static void scsi_ident_cpy(unsigned char *dest, unsigned char *src,
336 unsigned int len)
337 {
338 int start, end;
339
340 start = 0;
341 while (start < len) {
342 if (src[start] != ' ')
343 break;
344 start++;
345 }
346 end = len-1;
347 while (end > start) {
348 if (src[end] != ' ')
349 break;
350 end--;
351 }
352 for (; start <= end; start++)
353 *dest ++= src[start];
354 *dest = '\0';
355 }
356
scsi_read_capacity(struct udevice * dev,struct scsi_cmd * pccb,lbaint_t * capacity,unsigned long * blksz)357 static int scsi_read_capacity(struct udevice *dev, struct scsi_cmd *pccb,
358 lbaint_t *capacity, unsigned long *blksz)
359 {
360 *capacity = 0;
361
362 memset(pccb->cmd, '\0', sizeof(pccb->cmd));
363 pccb->cmd[0] = SCSI_RD_CAPAC10;
364 pccb->cmd[1] = pccb->lun << 5;
365 pccb->cmdlen = 10;
366 pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
367
368 pccb->datalen = 8;
369 if (scsi_exec(dev, pccb))
370 return 1;
371
372 *capacity = ((lbaint_t)pccb->pdata[0] << 24) |
373 ((lbaint_t)pccb->pdata[1] << 16) |
374 ((lbaint_t)pccb->pdata[2] << 8) |
375 ((lbaint_t)pccb->pdata[3]);
376
377 if (*capacity != 0xffffffff) {
378 /* Read capacity (10) was sufficient for this drive. */
379 *blksz = ((unsigned long)pccb->pdata[4] << 24) |
380 ((unsigned long)pccb->pdata[5] << 16) |
381 ((unsigned long)pccb->pdata[6] << 8) |
382 ((unsigned long)pccb->pdata[7]);
383 return 0;
384 }
385
386 /* Read capacity (10) was insufficient. Use read capacity (16). */
387 memset(pccb->cmd, '\0', sizeof(pccb->cmd));
388 pccb->cmd[0] = SCSI_RD_CAPAC16;
389 pccb->cmd[1] = 0x10;
390 pccb->cmdlen = 16;
391 pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
392
393 pccb->datalen = 16;
394 pccb->dma_dir = DMA_FROM_DEVICE;
395 if (scsi_exec(dev, pccb))
396 return 1;
397
398 *capacity = ((uint64_t)pccb->pdata[0] << 56) |
399 ((uint64_t)pccb->pdata[1] << 48) |
400 ((uint64_t)pccb->pdata[2] << 40) |
401 ((uint64_t)pccb->pdata[3] << 32) |
402 ((uint64_t)pccb->pdata[4] << 24) |
403 ((uint64_t)pccb->pdata[5] << 16) |
404 ((uint64_t)pccb->pdata[6] << 8) |
405 ((uint64_t)pccb->pdata[7]);
406
407 *blksz = ((uint64_t)pccb->pdata[8] << 56) |
408 ((uint64_t)pccb->pdata[9] << 48) |
409 ((uint64_t)pccb->pdata[10] << 40) |
410 ((uint64_t)pccb->pdata[11] << 32) |
411 ((uint64_t)pccb->pdata[12] << 24) |
412 ((uint64_t)pccb->pdata[13] << 16) |
413 ((uint64_t)pccb->pdata[14] << 8) |
414 ((uint64_t)pccb->pdata[15]);
415
416 return 0;
417 }
418
419
420 /*
421 * Some setup (fill-in) routines
422 */
scsi_setup_test_unit_ready(struct scsi_cmd * pccb)423 static void scsi_setup_test_unit_ready(struct scsi_cmd *pccb)
424 {
425 pccb->cmd[0] = SCSI_TST_U_RDY;
426 pccb->cmd[1] = pccb->lun << 5;
427 pccb->cmd[2] = 0;
428 pccb->cmd[3] = 0;
429 pccb->cmd[4] = 0;
430 pccb->cmd[5] = 0;
431 pccb->cmdlen = 6;
432 pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
433 }
434
435 /**
436 * scsi_init_dev_desc_priv - initialize only SCSI specific blk_desc properties
437 *
438 * @dev_desc: Block device description pointer
439 */
scsi_init_dev_desc_priv(struct blk_desc * dev_desc)440 static void scsi_init_dev_desc_priv(struct blk_desc *dev_desc)
441 {
442 dev_desc->target = 0xff;
443 dev_desc->lun = 0xff;
444 dev_desc->log2blksz =
445 LOG2_INVALID(typeof(dev_desc->log2blksz));
446 dev_desc->type = DEV_TYPE_UNKNOWN;
447 dev_desc->vendor[0] = 0;
448 dev_desc->product[0] = 0;
449 dev_desc->revision[0] = 0;
450 dev_desc->removable = false;
451 }
452
453 #if !defined(CONFIG_DM_SCSI)
454 /**
455 * scsi_init_dev_desc - initialize all SCSI specific blk_desc properties
456 *
457 * @dev_desc: Block device description pointer
458 * @devnum: Device number
459 */
scsi_init_dev_desc(struct blk_desc * dev_desc,int devnum)460 static void scsi_init_dev_desc(struct blk_desc *dev_desc, int devnum)
461 {
462 dev_desc->lba = 0;
463 dev_desc->blksz = 0;
464 dev_desc->if_type = IF_TYPE_SCSI;
465 dev_desc->devnum = devnum;
466 dev_desc->part_type = PART_TYPE_UNKNOWN;
467
468 scsi_init_dev_desc_priv(dev_desc);
469 }
470 #endif
471
472 /**
473 * scsi_detect_dev - Detect scsi device
474 *
475 * @target: target id
476 * @lun: target lun
477 * @dev_desc: block device description
478 *
479 * The scsi_detect_dev detects and fills a dev_desc structure when the device is
480 * detected.
481 *
482 * Return: 0 on success, error value otherwise
483 */
scsi_detect_dev(struct udevice * dev,int target,int lun,struct blk_desc * dev_desc)484 static int scsi_detect_dev(struct udevice *dev, int target, int lun,
485 struct blk_desc *dev_desc)
486 {
487 unsigned char perq, modi;
488 lbaint_t capacity;
489 unsigned long blksz;
490 struct scsi_cmd *pccb = (struct scsi_cmd *)&tempccb;
491 int count, err;
492
493 pccb->target = target;
494 pccb->lun = lun;
495 pccb->pdata = (unsigned char *)&tempbuff;
496 pccb->datalen = 512;
497 pccb->dma_dir = DMA_FROM_DEVICE;
498 scsi_setup_inquiry(pccb);
499 if (scsi_exec(dev, pccb)) {
500 if (pccb->contr_stat == SCSI_SEL_TIME_OUT) {
501 /*
502 * selection timeout => assuming no
503 * device present
504 */
505 debug("Selection timeout ID %d\n",
506 pccb->target);
507 return -ETIMEDOUT;
508 }
509 scsi_print_error(pccb);
510 return -ENODEV;
511 }
512 perq = tempbuff[0];
513 modi = tempbuff[1];
514 if ((perq & 0x1f) == 0x1f)
515 return -ENODEV; /* skip unknown devices */
516 if ((modi & 0x80) == 0x80) /* drive is removable */
517 dev_desc->removable = true;
518 /* get info for this device */
519 scsi_ident_cpy((unsigned char *)dev_desc->vendor,
520 &tempbuff[8], 8);
521 scsi_ident_cpy((unsigned char *)dev_desc->product,
522 &tempbuff[16], 16);
523 scsi_ident_cpy((unsigned char *)dev_desc->revision,
524 &tempbuff[32], 4);
525 dev_desc->target = pccb->target;
526 dev_desc->lun = pccb->lun;
527
528 for (count = 0; count < 3; count++) {
529 pccb->datalen = 0;
530 scsi_setup_test_unit_ready(pccb);
531 err = scsi_exec(dev, pccb);
532 if (!err)
533 break;
534 }
535 if (err) {
536 if (dev_desc->removable) {
537 dev_desc->type = perq;
538 goto removable;
539 }
540 scsi_print_error(pccb);
541 return -EINVAL;
542 }
543 if (scsi_read_capacity(dev, pccb, &capacity, &blksz)) {
544 scsi_print_error(pccb);
545 return -EINVAL;
546 }
547 dev_desc->lba = capacity;
548 dev_desc->blksz = blksz;
549 dev_desc->log2blksz = LOG2(dev_desc->blksz);
550 dev_desc->type = perq;
551 removable:
552 return 0;
553 }
554
555 /*
556 * (re)-scan the scsi bus and reports scsi device info
557 * to the user if mode = 1
558 */
559 #if defined(CONFIG_DM_SCSI)
do_scsi_scan_one(struct udevice * dev,int id,int lun,bool verbose)560 static int do_scsi_scan_one(struct udevice *dev, int id, int lun, bool verbose)
561 {
562 int ret;
563 struct udevice *bdev;
564 struct blk_desc bd;
565 struct blk_desc *bdesc;
566 char str[10];
567
568 /*
569 * detect the scsi driver to get information about its geometry (block
570 * size, number of blocks) and other parameters (ids, type, ...)
571 */
572 scsi_init_dev_desc_priv(&bd);
573 if (scsi_detect_dev(dev, id, lun, &bd))
574 return -ENODEV;
575
576 /*
577 * Create only one block device and do detection
578 * to make sure that there won't be a lot of
579 * block devices created
580 */
581 snprintf(str, sizeof(str), "id%dlun%d", id, lun);
582 ret = blk_create_devicef(dev, "scsi_blk", str, IF_TYPE_SCSI, -1,
583 bd.blksz, bd.lba, &bdev);
584 if (ret) {
585 debug("Can't create device\n");
586 return ret;
587 }
588
589 bdesc = dev_get_uclass_plat(bdev);
590 bdesc->target = id;
591 bdesc->lun = lun;
592 bdesc->removable = bd.removable;
593 bdesc->type = bd.type;
594 memcpy(&bdesc->vendor, &bd.vendor, sizeof(bd.vendor));
595 memcpy(&bdesc->product, &bd.product, sizeof(bd.product));
596 memcpy(&bdesc->revision, &bd.revision, sizeof(bd.revision));
597
598 if (verbose) {
599 printf(" Device %d: ", bdesc->devnum);
600 dev_print(bdesc);
601 }
602 return 0;
603 }
604
scsi_scan_dev(struct udevice * dev,bool verbose)605 int scsi_scan_dev(struct udevice *dev, bool verbose)
606 {
607 struct scsi_plat *uc_plat; /* scsi controller plat */
608 int ret;
609 int i;
610 int lun;
611
612 /* probe SCSI controller driver */
613 ret = device_probe(dev);
614 if (ret)
615 return ret;
616
617 /* Get controller plat */
618 uc_plat = dev_get_uclass_plat(dev);
619
620 for (i = 0; i < uc_plat->max_id; i++)
621 for (lun = 0; lun < uc_plat->max_lun; lun++)
622 do_scsi_scan_one(dev, i, lun, verbose);
623
624 return 0;
625 }
626
scsi_scan(bool verbose)627 int scsi_scan(bool verbose)
628 {
629 struct uclass *uc;
630 struct udevice *dev; /* SCSI controller */
631 int ret;
632
633 if (verbose)
634 printf("scanning bus for devices...\n");
635
636 blk_unbind_all(IF_TYPE_SCSI);
637
638 ret = uclass_get(UCLASS_SCSI, &uc);
639 if (ret)
640 return ret;
641
642 uclass_foreach_dev(dev, uc) {
643 ret = scsi_scan_dev(dev, verbose);
644 if (ret)
645 return ret;
646 }
647
648 return 0;
649 }
650 #else
scsi_scan(bool verbose)651 int scsi_scan(bool verbose)
652 {
653 unsigned char i, lun;
654 int ret;
655
656 if (verbose)
657 printf("scanning bus for devices...\n");
658 for (i = 0; i < CONFIG_SYS_SCSI_MAX_DEVICE; i++)
659 scsi_init_dev_desc(&scsi_dev_desc[i], i);
660
661 scsi_max_devs = 0;
662 for (i = 0; i < CONFIG_SYS_SCSI_MAX_SCSI_ID; i++) {
663 for (lun = 0; lun < CONFIG_SYS_SCSI_MAX_LUN; lun++) {
664 struct blk_desc *bdesc = &scsi_dev_desc[scsi_max_devs];
665
666 ret = scsi_detect_dev(NULL, i, lun, bdesc);
667 if (ret)
668 continue;
669 part_init(bdesc);
670
671 if (verbose) {
672 printf(" Device %d: ", bdesc->devnum);
673 dev_print(bdesc);
674 }
675 scsi_max_devs++;
676 } /* next LUN */
677 }
678 if (scsi_max_devs > 0)
679 scsi_curr_dev = 0;
680 else
681 scsi_curr_dev = -1;
682
683 printf("Found %d device(s).\n", scsi_max_devs);
684 #ifndef CONFIG_SPL_BUILD
685 env_set_ulong("scsidevs", scsi_max_devs);
686 #endif
687 return 0;
688 }
689 #endif
690
691 #ifdef CONFIG_BLK
692 static const struct blk_ops scsi_blk_ops = {
693 .read = scsi_read,
694 .write = scsi_write,
695 };
696
697 U_BOOT_DRIVER(scsi_blk) = {
698 .name = "scsi_blk",
699 .id = UCLASS_BLK,
700 .ops = &scsi_blk_ops,
701 };
702 #else
703 U_BOOT_LEGACY_BLK(scsi) = {
704 .if_typename = "scsi",
705 .if_type = IF_TYPE_SCSI,
706 .max_devs = CONFIG_SYS_SCSI_MAX_DEVICE,
707 .desc = scsi_dev_desc,
708 };
709 #endif
710