1 // SPDX-License-Identifier: GPL-2.0+
3 * dfu.c -- DFU back-end routines
5 * Copyright (C) 2012 Samsung Electronics
6 * author: Lukasz Majewski <l.majewski@samsung.com>
18 static unsigned char *dfu_file_buf;
19 static u64 dfu_file_buf_len;
20 static u64 dfu_file_buf_offset;
22 static int mmc_block_op(enum dfu_op op, struct dfu_entity *dfu,
23 u64 offset, void *buf, long *len)
26 u32 blk_start, blk_count, n = 0;
27 int ret, part_num_bkp = 0;
29 mmc = find_mmc_device(dfu->data.mmc.dev_num);
31 pr_err("Device MMC %d - not found!", dfu->data.mmc.dev_num);
36 * We must ensure that we work in lba_blk_size chunks, so ALIGN
39 *len = ALIGN(*len, dfu->data.mmc.lba_blk_size);
41 blk_start = dfu->data.mmc.lba_start +
42 (u32)lldiv(offset, dfu->data.mmc.lba_blk_size);
43 blk_count = *len / dfu->data.mmc.lba_blk_size;
44 if (blk_start + blk_count >
45 dfu->data.mmc.lba_start + dfu->data.mmc.lba_size) {
46 puts("Request would exceed designated area!\n");
50 if (dfu->data.mmc.hw_partition >= 0) {
51 part_num_bkp = mmc_get_blk_desc(mmc)->hwpart;
52 ret = blk_select_hwpart_devnum(IF_TYPE_MMC,
53 dfu->data.mmc.dev_num,
54 dfu->data.mmc.hw_partition);
59 debug("%s: %s dev: %d start: %d cnt: %d buf: 0x%p\n", __func__,
60 op == DFU_OP_READ ? "MMC READ" : "MMC WRITE",
61 dfu->data.mmc.dev_num, blk_start, blk_count, buf);
64 n = blk_dread(mmc_get_blk_desc(mmc), blk_start, blk_count, buf);
67 n = blk_dwrite(mmc_get_blk_desc(mmc), blk_start, blk_count,
71 pr_err("Operation not supported\n");
75 pr_err("MMC operation failed");
76 if (dfu->data.mmc.hw_partition >= 0)
77 blk_select_hwpart_devnum(IF_TYPE_MMC,
78 dfu->data.mmc.dev_num,
83 if (dfu->data.mmc.hw_partition >= 0) {
84 ret = blk_select_hwpart_devnum(IF_TYPE_MMC,
85 dfu->data.mmc.dev_num,
94 static int mmc_file_op(enum dfu_op op, struct dfu_entity *dfu,
95 u64 offset, void *buf, u64 *len)
102 switch (dfu->layout) {
104 fstype = FS_TYPE_FAT;
107 fstype = FS_TYPE_EXT;
110 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
111 dfu_get_layout(dfu->layout));
115 snprintf(dev_part_str, sizeof(dev_part_str), "%d:%d",
116 dfu->data.mmc.dev, dfu->data.mmc.part);
118 ret = fs_set_blk_dev("mmc", dev_part_str, fstype);
120 puts("dfu: fs_set_blk_dev error!\n");
126 ret = fs_read(dfu->name, (size_t)buf, offset, *len, &size);
128 puts("dfu: fs_read error!\n");
134 ret = fs_write(dfu->name, (size_t)buf, offset, *len, &size);
136 puts("dfu: fs_write error!\n");
141 ret = fs_size(dfu->name, &size);
143 puts("dfu: fs_size error!\n");
155 static int mmc_file_buf_write(struct dfu_entity *dfu, u64 offset, void *buf, long *len)
160 dfu_file_buf_len = 0;
161 dfu_file_buf_offset = 0;
164 /* Add to the current buffer. */
165 if (dfu_file_buf_len + *len > CONFIG_SYS_DFU_MAX_FILE_SIZE)
166 *len = CONFIG_SYS_DFU_MAX_FILE_SIZE - dfu_file_buf_len;
167 memcpy(dfu_file_buf + dfu_file_buf_len, buf, *len);
168 dfu_file_buf_len += *len;
170 if (dfu_file_buf_len == CONFIG_SYS_DFU_MAX_FILE_SIZE) {
171 ret = mmc_file_op(DFU_OP_WRITE, dfu, dfu_file_buf_offset,
172 dfu_file_buf, &dfu_file_buf_len);
173 dfu_file_buf_offset += dfu_file_buf_len;
174 dfu_file_buf_len = 0;
180 static int mmc_file_buf_write_finish(struct dfu_entity *dfu)
182 int ret = mmc_file_op(DFU_OP_WRITE, dfu, dfu_file_buf_offset,
183 dfu_file_buf, &dfu_file_buf_len);
185 /* Now that we're done */
186 dfu_file_buf_len = 0;
187 dfu_file_buf_offset = 0;
192 int dfu_write_medium_mmc(struct dfu_entity *dfu,
193 u64 offset, void *buf, long *len)
197 switch (dfu->layout) {
199 ret = mmc_block_op(DFU_OP_WRITE, dfu, offset, buf, len);
203 ret = mmc_file_buf_write(dfu, offset, buf, len);
206 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
207 dfu_get_layout(dfu->layout));
213 int dfu_flush_medium_mmc(struct dfu_entity *dfu)
217 if (dfu->layout != DFU_RAW_ADDR) {
219 ret = mmc_file_buf_write_finish(dfu);
225 int dfu_get_medium_size_mmc(struct dfu_entity *dfu, u64 *size)
229 switch (dfu->layout) {
231 *size = dfu->data.mmc.lba_size * dfu->data.mmc.lba_blk_size;
235 ret = mmc_file_op(DFU_OP_SIZE, dfu, 0, NULL, size);
240 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
241 dfu_get_layout(dfu->layout));
247 static int mmc_file_buf_read(struct dfu_entity *dfu, u64 offset, void *buf,
252 if (offset == 0 || offset >= dfu_file_buf_offset + dfu_file_buf_len ||
253 offset + *len < dfu_file_buf_offset) {
254 u64 file_len = CONFIG_SYS_DFU_MAX_FILE_SIZE;
256 ret = mmc_file_op(DFU_OP_READ, dfu, offset, dfu_file_buf,
260 dfu_file_buf_len = file_len;
261 dfu_file_buf_offset = offset;
263 if (offset + *len > dfu_file_buf_offset + dfu_file_buf_len)
266 /* Add to the current buffer. */
267 memcpy(buf, dfu_file_buf + offset - dfu_file_buf_offset, *len);
272 int dfu_read_medium_mmc(struct dfu_entity *dfu, u64 offset, void *buf,
277 switch (dfu->layout) {
279 ret = mmc_block_op(DFU_OP_READ, dfu, offset, buf, len);
283 ret = mmc_file_buf_read(dfu, offset, buf, len);
286 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
287 dfu_get_layout(dfu->layout));
293 void dfu_free_entity_mmc(struct dfu_entity *dfu)
302 * @param s Parameter string containing space-separated arguments:
304 * raw (raw read/write)
307 * part (partition image)
309 * lba_start and lba_size, for raw write
310 * mmc_dev and mmc_part, for filesystems and part
312 * mmcpart <num> (access to HW eMMC partitions)
314 int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr, char *s)
316 const char *entity_type;
323 const char **parg = argv;
325 dfu->data.mmc.dev_num = simple_strtoul(devstr, NULL, 10);
327 for (; parg < argv + sizeof(argv) / sizeof(*argv); ++parg) {
328 *parg = strsep(&s, " ");
330 pr_err("Invalid number of arguments.\n");
335 entity_type = argv[0];
337 * Base 0 means we'll accept (prefixed with 0x or 0) base 16, 8,
340 second_arg = simple_strtoul(argv[1], NULL, 0);
341 third_arg = simple_strtoul(argv[2], NULL, 0);
343 mmc = find_mmc_device(dfu->data.mmc.dev_num);
345 pr_err("Couldn't find MMC device no. %d.\n",
346 dfu->data.mmc.dev_num);
351 pr_err("Couldn't init MMC device.\n");
355 dfu->data.mmc.hw_partition = -EINVAL;
356 if (!strcmp(entity_type, "raw")) {
357 dfu->layout = DFU_RAW_ADDR;
358 dfu->data.mmc.lba_start = second_arg;
359 dfu->data.mmc.lba_size = third_arg;
360 dfu->data.mmc.lba_blk_size = mmc->read_bl_len;
363 * Check for an extra entry at dfu_alt_info env variable
364 * specifying the mmc HW defined partition number
367 if (!strcmp(strsep(&s, " "), "mmcpart"))
368 dfu->data.mmc.hw_partition =
369 simple_strtoul(s, NULL, 0);
371 } else if (!strcmp(entity_type, "part")) {
372 disk_partition_t partinfo;
373 struct blk_desc *blk_dev = mmc_get_blk_desc(mmc);
374 int mmcdev = second_arg;
375 int mmcpart = third_arg;
378 if (part_get_info(blk_dev, mmcpart, &partinfo) != 0) {
379 pr_err("Couldn't find part #%d on mmc device #%d\n",
385 * Check for an extra entry at dfu_alt_info env variable
386 * specifying the mmc HW defined partition number
389 if (!strcmp(strsep(&s, " "), "offset"))
390 offset = simple_strtoul(s, NULL, 0);
392 dfu->layout = DFU_RAW_ADDR;
393 dfu->data.mmc.lba_start = partinfo.start + offset;
394 dfu->data.mmc.lba_size = partinfo.size-offset;
395 dfu->data.mmc.lba_blk_size = partinfo.blksz;
396 } else if (!strcmp(entity_type, "fat")) {
397 dfu->layout = DFU_FS_FAT;
398 } else if (!strcmp(entity_type, "ext4")) {
399 dfu->layout = DFU_FS_EXT4;
401 pr_err("Memory layout (%s) not supported!\n", entity_type);
405 /* if it's NOT a raw write */
406 if (strcmp(entity_type, "raw")) {
407 dfu->data.mmc.dev = second_arg;
408 dfu->data.mmc.part = third_arg;
411 dfu->dev_type = DFU_DEV_MMC;
412 dfu->get_medium_size = dfu_get_medium_size_mmc;
413 dfu->read_medium = dfu_read_medium_mmc;
414 dfu->write_medium = dfu_write_medium_mmc;
415 dfu->flush_medium = dfu_flush_medium_mmc;
417 dfu->free_entity = dfu_free_entity_mmc;
419 /* Check if file buffer is ready */
421 dfu_file_buf = memalign(CONFIG_SYS_CACHELINE_SIZE,
422 CONFIG_SYS_DFU_MAX_FILE_SIZE);
424 pr_err("Could not memalign 0x%x bytes",
425 CONFIG_SYS_DFU_MAX_FILE_SIZE);