1 // SPDX-License-Identifier: GPL-2.0+
3 * dfu.c -- DFU back-end routines
5 * Copyright (C) 2012 Samsung Electronics
16 #include <linux/list.h>
17 #include <linux/compiler.h>
19 static LIST_HEAD(dfu_list);
20 static int dfu_alt_num;
21 static int alt_num_cnt;
22 static struct hash_algo *dfu_hash_algo;
25 * The purpose of the dfu_usb_get_reset() function is to
26 * provide information if after USB_DETACH request
27 * being sent the dfu-util performed reset of USB
30 * Described behaviour is the only way to distinct if
31 * user has typed -e (detach) or -R (reset) when invoking
35 __weak bool dfu_usb_get_reset(void)
37 #ifdef CONFIG_SPL_DFU_NO_RESET
44 static int dfu_find_alt_num(const char *s)
55 int dfu_init_env_entities(char *interface, char *devstr)
61 #ifdef CONFIG_SET_DFU_ALT_INFO
62 set_dfu_alt_info(interface, devstr);
64 str_env = env_get("dfu_alt_info");
66 pr_err("\"dfu_alt_info\" env variable not defined!\n");
70 env_bkp = strdup(str_env);
71 ret = dfu_config_entities(env_bkp, interface, devstr);
73 pr_err("DFU entities configuration failed!\n");
81 static unsigned char *dfu_buf;
82 static unsigned long dfu_buf_size;
84 unsigned char *dfu_free_buf(void)
91 unsigned long dfu_get_buf_size(void)
96 unsigned char *dfu_get_buf(struct dfu_entity *dfu)
103 s = env_get("dfu_bufsiz");
105 dfu_buf_size = (unsigned long)simple_strtol(s, NULL, 0);
107 if (!s || !dfu_buf_size)
108 dfu_buf_size = CONFIG_SYS_DFU_DATA_BUF_SIZE;
110 if (dfu->max_buf_size && dfu_buf_size > dfu->max_buf_size)
111 dfu_buf_size = dfu->max_buf_size;
113 dfu_buf = memalign(CONFIG_SYS_CACHELINE_SIZE, dfu_buf_size);
115 printf("%s: Could not memalign 0x%lx bytes\n",
116 __func__, dfu_buf_size);
121 static char *dfu_get_hash_algo(void)
125 s = env_get("dfu_hash_algo");
129 if (!strcmp(s, "crc32")) {
130 debug("%s: DFU hash method: %s\n", __func__, s);
134 pr_err("DFU hash method: %s not supported!\n", s);
138 static int dfu_write_buffer_drain(struct dfu_entity *dfu)
144 w_size = dfu->i_buf - dfu->i_buf_start;
149 dfu_hash_algo->hash_update(dfu_hash_algo, &dfu->crc,
150 dfu->i_buf_start, w_size, 0);
152 ret = dfu->write_medium(dfu, dfu->offset, dfu->i_buf_start, &w_size);
154 debug("%s: Write error!\n", __func__);
157 dfu->i_buf = dfu->i_buf_start;
160 dfu->offset += w_size;
167 void dfu_transaction_cleanup(struct dfu_entity *dfu)
169 /* clear everything */
172 dfu->i_blk_seq_num = 0;
173 dfu->i_buf_start = dfu_get_buf(dfu);
174 dfu->i_buf_end = dfu->i_buf_start;
175 dfu->i_buf = dfu->i_buf_start;
183 int dfu_transaction_initiate(struct dfu_entity *dfu, bool read)
190 dfu_transaction_cleanup(dfu);
192 if (dfu->i_buf_start == NULL)
195 dfu->i_buf_end = dfu->i_buf_start + dfu_get_buf_size();
198 ret = dfu->get_medium_size(dfu, &dfu->r_left);
201 debug("%s: %s %lld [B]\n", __func__, dfu->name, dfu->r_left);
209 int dfu_flush(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
213 ret = dfu_write_buffer_drain(dfu);
217 if (dfu->flush_medium)
218 ret = dfu->flush_medium(dfu);
221 printf("\nDFU complete %s: 0x%08x\n", dfu_hash_algo->name,
224 dfu_transaction_cleanup(dfu);
229 int dfu_write(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
233 debug("%s: name: %s buf: 0x%p size: 0x%x p_num: 0x%x offset: 0x%llx bufoffset: 0x%lx\n",
234 __func__, dfu->name, buf, size, blk_seq_num, dfu->offset,
235 (unsigned long)(dfu->i_buf - dfu->i_buf_start));
237 ret = dfu_transaction_initiate(dfu, false);
241 if (dfu->i_blk_seq_num != blk_seq_num) {
242 printf("%s: Wrong sequence number! [%d] [%d]\n",
243 __func__, dfu->i_blk_seq_num, blk_seq_num);
244 dfu_transaction_cleanup(dfu);
248 /* DFU 1.1 standard says:
249 * The wBlockNum field is a block sequence number. It increments each
250 * time a block is transferred, wrapping to zero from 65,535. It is used
251 * to provide useful context to the DFU loader in the device."
253 * This means that it's a 16 bit counter that roll-overs at
254 * 0xffff -> 0x0000. By having a typical 4K transfer block
255 * we roll-over at exactly 256MB. Not very fun to debug.
257 * Handling rollover, and having an inited variable,
261 /* handle rollover */
262 dfu->i_blk_seq_num = (dfu->i_blk_seq_num + 1) & 0xffff;
264 /* flush buffer if overflow */
265 if ((dfu->i_buf + size) > dfu->i_buf_end) {
266 ret = dfu_write_buffer_drain(dfu);
268 dfu_transaction_cleanup(dfu);
273 /* we should be in buffer now (if not then size too large) */
274 if ((dfu->i_buf + size) > dfu->i_buf_end) {
275 pr_err("Buffer overflow! (0x%p + 0x%x > 0x%p)\n", dfu->i_buf,
276 size, dfu->i_buf_end);
277 dfu_transaction_cleanup(dfu);
281 memcpy(dfu->i_buf, buf, size);
284 /* if end or if buffer full flush */
285 if (size == 0 || (dfu->i_buf + size) > dfu->i_buf_end) {
286 ret = dfu_write_buffer_drain(dfu);
288 dfu_transaction_cleanup(dfu);
296 static int dfu_read_buffer_fill(struct dfu_entity *dfu, void *buf, int size)
303 /* get chunk that can be read */
304 chunk = min((long)size, dfu->b_left);
307 memcpy(buf, dfu->i_buf, chunk);
309 dfu_hash_algo->hash_update(dfu_hash_algo,
314 dfu->b_left -= chunk;
322 /* no more to read */
323 if (dfu->r_left == 0)
326 dfu->i_buf = dfu->i_buf_start;
327 dfu->b_left = dfu->i_buf_end - dfu->i_buf_start;
329 /* got to read, but buffer is empty */
330 if (dfu->b_left > dfu->r_left)
331 dfu->b_left = dfu->r_left;
332 ret = dfu->read_medium(dfu, dfu->offset, dfu->i_buf,
335 debug("%s: Read error!\n", __func__);
338 dfu->offset += dfu->b_left;
339 dfu->r_left -= dfu->b_left;
348 int dfu_read(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
352 debug("%s: name: %s buf: 0x%p size: 0x%x p_num: 0x%x i_buf: 0x%p\n",
353 __func__, dfu->name, buf, size, blk_seq_num, dfu->i_buf);
355 ret = dfu_transaction_initiate(dfu, true);
359 if (dfu->i_blk_seq_num != blk_seq_num) {
360 printf("%s: Wrong sequence number! [%d] [%d]\n",
361 __func__, dfu->i_blk_seq_num, blk_seq_num);
364 /* handle rollover */
365 dfu->i_blk_seq_num = (dfu->i_blk_seq_num + 1) & 0xffff;
367 ret = dfu_read_buffer_fill(dfu, buf, size);
369 printf("%s: Failed to fill buffer\n", __func__);
375 debug("%s: %s %s: 0x%x\n", __func__, dfu->name,
376 dfu_hash_algo->name, dfu->crc);
377 puts("\nUPLOAD ... done\nCtrl+C to exit ...\n");
379 dfu_transaction_cleanup(dfu);
385 static int dfu_fill_entity(struct dfu_entity *dfu, char *s, int alt,
386 char *interface, char *devstr)
390 debug("%s: %s interface: %s dev: %s\n", __func__, s, interface, devstr);
391 st = strsep(&s, " ");
392 strcpy(dfu->name, st);
395 dfu->max_buf_size = 0;
396 dfu->free_entity = NULL;
398 /* Specific for mmc device */
399 if (strcmp(interface, "mmc") == 0) {
400 if (dfu_fill_entity_mmc(dfu, devstr, s))
402 } else if (strcmp(interface, "nand") == 0) {
403 if (dfu_fill_entity_nand(dfu, devstr, s))
405 } else if (strcmp(interface, "ram") == 0) {
406 if (dfu_fill_entity_ram(dfu, devstr, s))
408 } else if (strcmp(interface, "sf") == 0) {
409 if (dfu_fill_entity_sf(dfu, devstr, s))
412 printf("%s: Device %s not (yet) supported!\n",
413 __func__, interface);
421 void dfu_free_entities(void)
423 struct dfu_entity *dfu, *p, *t = NULL;
426 list_for_each_entry_safe_reverse(dfu, p, &dfu_list, list) {
427 list_del(&dfu->list);
428 if (dfu->free_entity)
429 dfu->free_entity(dfu);
434 INIT_LIST_HEAD(&dfu_list);
439 int dfu_config_entities(char *env, char *interface, char *devstr)
441 struct dfu_entity *dfu;
445 dfu_alt_num = dfu_find_alt_num(env);
446 debug("%s: dfu_alt_num=%d\n", __func__, dfu_alt_num);
448 dfu_hash_algo = NULL;
449 s = dfu_get_hash_algo();
451 ret = hash_lookup_algo(s, &dfu_hash_algo);
453 pr_err("Hash algorithm %s not supported\n", s);
456 dfu = calloc(sizeof(*dfu), dfu_alt_num);
459 for (i = 0; i < dfu_alt_num; i++) {
461 s = strsep(&env, ";");
462 ret = dfu_fill_entity(&dfu[i], s, alt_num_cnt, interface,
465 /* We will free "dfu" in dfu_free_entities() */
469 list_add_tail(&dfu[i].list, &dfu_list);
476 const char *dfu_get_dev_type(enum dfu_device_type t)
478 const char *dev_t[] = {NULL, "eMMC", "OneNAND", "NAND", "RAM", "SF" };
482 const char *dfu_get_layout(enum dfu_layout l)
484 const char *dfu_layout[] = {NULL, "RAW_ADDR", "FAT", "EXT2",
485 "EXT3", "EXT4", "RAM_ADDR" };
486 return dfu_layout[l];
489 void dfu_show_entities(void)
491 struct dfu_entity *dfu;
493 puts("DFU alt settings list:\n");
495 list_for_each_entry(dfu, &dfu_list, list) {
496 printf("dev: %s alt: %d name: %s layout: %s\n",
497 dfu_get_dev_type(dfu->dev_type), dfu->alt,
498 dfu->name, dfu_get_layout(dfu->layout));
502 int dfu_get_alt_number(void)
507 struct dfu_entity *dfu_get_entity(int alt)
509 struct dfu_entity *dfu;
511 list_for_each_entry(dfu, &dfu_list, list) {
519 int dfu_get_alt(char *name)
521 struct dfu_entity *dfu;
524 list_for_each_entry(dfu, &dfu_list, list) {
525 if (dfu->name[0] != '/') {
526 if (!strncmp(dfu->name, name, strlen(dfu->name)))
530 * One must also consider absolute path
531 * (/boot/bin/uImage) available at dfu->name when
532 * compared "plain" file name (uImage)
534 * It is the case for e.g. thor gadget where lthor SW
535 * sends only the file name, so only the very last part
536 * of path must be checked for equality
539 str = strstr(dfu->name, name);
544 * Check if matching substring is the last element of
547 if (strlen(dfu->name) ==
548 ((str - dfu->name) + strlen(name)))
556 int dfu_write_from_mem_addr(struct dfu_entity *dfu, void *buf, int size)
558 unsigned long dfu_buf_size, write, left = size;
563 * Here we must call dfu_get_buf(dfu) first to be sure that dfu_buf_size
564 * has been properly initialized - e.g. if "dfu_bufsiz" has been taken
568 dfu_buf_size = dfu_get_buf_size();
569 debug("%s: dfu buf size: %lu\n", __func__, dfu_buf_size);
571 for (i = 0; left > 0; i++) {
572 write = min(dfu_buf_size, left);
574 debug("%s: dp: 0x%p left: %lu write: %lu\n", __func__,
576 ret = dfu_write(dfu, dp, write, i);
578 pr_err("DFU write failed\n");
586 ret = dfu_flush(dfu, NULL, 0, i);
588 pr_err("DFU flush failed!");