2 * dfu.c -- DFU back-end routines
4 * Copyright (C) 2012 Samsung Electronics
5 * author: Lukasz Majewski <l.majewski@samsung.com>
7 * SPDX-License-Identifier: GPL-2.0+
16 #include <linux/list.h>
17 #include <linux/compiler.h>
19 static bool dfu_reset_request;
20 static LIST_HEAD(dfu_list);
21 static int dfu_alt_num;
22 static int alt_num_count;
23 static int dfu_checksum_method;
27 return dfu_reset_request;
30 void dfu_trigger_reset()
32 dfu_reset_request = true;
35 static int dfu_find_alt_num(const char *s)
46 int dfu_init_env_entities(char *interface, int dev)
52 str_env = getenv("dfu_alt_info");
54 error("\"dfu_alt_info\" env variable not defined!\n");
58 env_bkp = strdup(str_env);
59 ret = dfu_config_entities(env_bkp, interface, dev);
61 error("DFU entities configuration failed!\n");
69 static unsigned char *dfu_buf;
70 static unsigned long dfu_buf_size = CONFIG_SYS_DFU_DATA_BUF_SIZE;
72 unsigned char *dfu_free_buf(void)
79 unsigned long dfu_get_buf_size(void)
84 unsigned char *dfu_get_buf(void)
91 s = getenv("dfu_bufsiz");
92 dfu_buf_size = s ? (unsigned long)simple_strtol(s, NULL, 16) :
93 CONFIG_SYS_DFU_DATA_BUF_SIZE;
95 dfu_buf = memalign(CONFIG_SYS_CACHELINE_SIZE, dfu_buf_size);
97 printf("%s: Could not memalign 0x%lx bytes\n",
98 __func__, dfu_buf_size);
103 static int dfu_get_checksum_method(void)
107 s = getenv("dfu_checksum_method");
109 return DFU_NO_CHECKSUM;
111 if (!strcmp(s, "crc32")) {
112 debug("%s: DFU checksum method: %s\n", __func__, s);
115 error("DFU checksum method: %s not supported!\n", s);
120 static int dfu_write_buffer_drain(struct dfu_entity *dfu)
126 w_size = dfu->i_buf - dfu->i_buf_start;
130 if (dfu_checksum_method == DFU_CRC32)
131 dfu->crc = crc32(dfu->crc, dfu->i_buf_start, w_size);
133 ret = dfu->write_medium(dfu, dfu->offset, dfu->i_buf_start, &w_size);
135 debug("%s: Write error!\n", __func__);
138 dfu->i_buf = dfu->i_buf_start;
141 dfu->offset += w_size;
148 int dfu_write(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
153 debug("%s: name: %s buf: 0x%p size: 0x%x p_num: 0x%x offset: 0x%llx bufoffset: 0x%x\n",
154 __func__, dfu->name, buf, size, blk_seq_num, dfu->offset,
155 dfu->i_buf - dfu->i_buf_start);
162 dfu->i_blk_seq_num = 0;
163 dfu->i_buf_start = dfu_get_buf();
164 if (dfu->i_buf_start == NULL)
166 dfu->i_buf_end = dfu_get_buf() + dfu_buf_size;
167 dfu->i_buf = dfu->i_buf_start;
172 if (dfu->i_blk_seq_num != blk_seq_num) {
173 printf("%s: Wrong sequence number! [%d] [%d]\n",
174 __func__, dfu->i_blk_seq_num, blk_seq_num);
178 /* DFU 1.1 standard says:
179 * The wBlockNum field is a block sequence number. It increments each
180 * time a block is transferred, wrapping to zero from 65,535. It is used
181 * to provide useful context to the DFU loader in the device."
183 * This means that it's a 16 bit counter that roll-overs at
184 * 0xffff -> 0x0000. By having a typical 4K transfer block
185 * we roll-over at exactly 256MB. Not very fun to debug.
187 * Handling rollover, and having an inited variable,
191 /* handle rollover */
192 dfu->i_blk_seq_num = (dfu->i_blk_seq_num + 1) & 0xffff;
194 /* flush buffer if overflow */
195 if ((dfu->i_buf + size) > dfu->i_buf_end) {
196 tret = dfu_write_buffer_drain(dfu);
201 /* we should be in buffer now (if not then size too large) */
202 if ((dfu->i_buf + size) > dfu->i_buf_end) {
203 error("Buffer overflow! (0x%p + 0x%x > 0x%p)\n", dfu->i_buf,
204 size, dfu->i_buf_end);
208 memcpy(dfu->i_buf, buf, size);
211 /* if end or if buffer full flush */
212 if (size == 0 || (dfu->i_buf + size) > dfu->i_buf_end) {
213 tret = dfu_write_buffer_drain(dfu);
220 /* Now try and flush to the medium if needed. */
221 if (dfu->flush_medium)
222 ret = dfu->flush_medium(dfu);
224 if (dfu_checksum_method == DFU_CRC32)
225 printf("\nDFU complete CRC32: 0x%08x\n", dfu->crc);
226 /* clear everything */
230 dfu->i_blk_seq_num = 0;
231 dfu->i_buf_start = dfu_buf;
232 dfu->i_buf_end = dfu_buf;
233 dfu->i_buf = dfu->i_buf_start;
239 return ret = 0 ? size : ret;
242 static int dfu_read_buffer_fill(struct dfu_entity *dfu, void *buf, int size)
249 /* get chunk that can be read */
250 chunk = min(size, dfu->b_left);
253 memcpy(buf, dfu->i_buf, chunk);
254 if (dfu_checksum_method == DFU_CRC32)
255 dfu->crc = crc32(dfu->crc, buf, chunk);
257 dfu->b_left -= chunk;
258 dfu->r_left -= chunk;
266 /* no more to read */
267 if (dfu->r_left == 0)
270 dfu->i_buf = dfu->i_buf_start;
271 dfu->b_left = dfu->i_buf_end - dfu->i_buf_start;
273 /* got to read, but buffer is empty */
274 if (dfu->b_left > dfu->r_left)
275 dfu->b_left = dfu->r_left;
276 ret = dfu->read_medium(dfu, dfu->offset, dfu->i_buf,
279 debug("%s: Read error!\n", __func__);
282 dfu->offset += dfu->b_left;
283 dfu->r_left -= dfu->b_left;
292 int dfu_read(struct dfu_entity *dfu, void *buf, int size, int blk_seq_num)
296 debug("%s: name: %s buf: 0x%p size: 0x%x p_num: 0x%x i_buf: 0x%p\n",
297 __func__, dfu->name, buf, size, blk_seq_num, dfu->i_buf);
300 dfu->i_buf_start = dfu_get_buf();
301 if (dfu->i_buf_start == NULL)
304 ret = dfu->read_medium(dfu, 0, dfu->i_buf_start, &dfu->r_left);
306 debug("%s: failed to get r_left\n", __func__);
310 debug("%s: %s %ld [B]\n", __func__, dfu->name, dfu->r_left);
312 dfu->i_blk_seq_num = 0;
315 dfu->i_buf_end = dfu_get_buf() + dfu_buf_size;
316 dfu->i_buf = dfu->i_buf_start;
317 dfu->b_left = min(dfu_buf_size, dfu->r_left);
324 if (dfu->i_blk_seq_num != blk_seq_num) {
325 printf("%s: Wrong sequence number! [%d] [%d]\n",
326 __func__, dfu->i_blk_seq_num, blk_seq_num);
329 /* handle rollover */
330 dfu->i_blk_seq_num = (dfu->i_blk_seq_num + 1) & 0xffff;
332 ret = dfu_read_buffer_fill(dfu, buf, size);
334 printf("%s: Failed to fill buffer\n", __func__);
339 if (dfu_checksum_method == DFU_CRC32)
340 debug("%s: %s CRC32: 0x%x\n", __func__, dfu->name,
342 puts("\nUPLOAD ... done\nCtrl+C to exit ...\n");
345 dfu->i_blk_seq_num = 0;
348 dfu->i_buf_start = dfu_buf;
349 dfu->i_buf_end = dfu_buf;
350 dfu->i_buf = dfu->i_buf_start;
361 static int dfu_fill_entity(struct dfu_entity *dfu, char *s, int alt,
362 char *interface, int num)
366 debug("%s: %s interface: %s num: %d\n", __func__, s, interface, num);
367 st = strsep(&s, " ");
368 strcpy(dfu->name, st);
373 /* Specific for mmc device */
374 if (strcmp(interface, "mmc") == 0) {
375 if (dfu_fill_entity_mmc(dfu, s))
377 } else if (strcmp(interface, "nand") == 0) {
378 if (dfu_fill_entity_nand(dfu, s))
380 } else if (strcmp(interface, "ram") == 0) {
381 if (dfu_fill_entity_ram(dfu, s))
384 printf("%s: Device %s not (yet) supported!\n",
385 __func__, interface);
392 void dfu_free_entities(void)
394 struct dfu_entity *dfu, *p, *t = NULL;
396 list_for_each_entry_safe_reverse(dfu, p, &dfu_list, list) {
397 list_del(&dfu->list);
402 INIT_LIST_HEAD(&dfu_list);
407 int dfu_config_entities(char *env, char *interface, int num)
409 struct dfu_entity *dfu;
413 dfu_alt_num = dfu_find_alt_num(env);
414 debug("%s: dfu_alt_num=%d\n", __func__, dfu_alt_num);
416 ret = dfu_get_checksum_method();
419 dfu_checksum_method = ret;
421 dfu = calloc(sizeof(*dfu), dfu_alt_num);
424 for (i = 0; i < dfu_alt_num; i++) {
426 s = strsep(&env, ";");
427 ret = dfu_fill_entity(&dfu[i], s, alt_num_count, interface, num);
431 list_add_tail(&dfu[i].list, &dfu_list);
438 const char *dfu_get_dev_type(enum dfu_device_type t)
440 const char *dev_t[] = {NULL, "eMMC", "OneNAND", "NAND", "RAM" };
444 const char *dfu_get_layout(enum dfu_layout l)
446 const char *dfu_layout[] = {NULL, "RAW_ADDR", "FAT", "EXT2",
447 "EXT3", "EXT4", "RAM_ADDR" };
448 return dfu_layout[l];
451 void dfu_show_entities(void)
453 struct dfu_entity *dfu;
455 puts("DFU alt settings list:\n");
457 list_for_each_entry(dfu, &dfu_list, list) {
458 printf("dev: %s alt: %d name: %s layout: %s\n",
459 dfu_get_dev_type(dfu->dev_type), dfu->alt,
460 dfu->name, dfu_get_layout(dfu->layout));
464 int dfu_get_alt_number(void)
469 struct dfu_entity *dfu_get_entity(int alt)
471 struct dfu_entity *dfu;
473 list_for_each_entry(dfu, &dfu_list, list) {
481 int dfu_get_alt(char *name)
483 struct dfu_entity *dfu;
485 list_for_each_entry(dfu, &dfu_list, list) {
486 if (!strncmp(dfu->name, name, strlen(dfu->name)))