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 long dfu_file_buf_filled;
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_buffer(struct dfu_entity *dfu, void *buf, long *len)
96 if (dfu_file_buf_len + *len > CONFIG_SYS_DFU_MAX_FILE_SIZE) {
101 /* Add to the current buffer. */
102 memcpy(dfu_file_buf + dfu_file_buf_len, buf, *len);
103 dfu_file_buf_len += *len;
108 static int mmc_file_op(enum dfu_op op, struct dfu_entity *dfu,
111 char dev_part_str[8];
116 switch (dfu->layout) {
118 fstype = FS_TYPE_FAT;
121 fstype = FS_TYPE_EXT;
124 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
125 dfu_get_layout(dfu->layout));
129 snprintf(dev_part_str, sizeof(dev_part_str), "%d:%d",
130 dfu->data.mmc.dev, dfu->data.mmc.part);
132 ret = fs_set_blk_dev("mmc", dev_part_str, fstype);
134 puts("dfu: fs_set_blk_dev error!\n");
140 ret = fs_read(dfu->name, (size_t)buf, 0, 0, &size);
142 puts("dfu: fs_read error!\n");
148 ret = fs_write(dfu->name, (size_t)buf, 0, *len, &size);
150 puts("dfu: fs_write error!\n");
155 ret = fs_size(dfu->name, &size);
157 puts("dfu: fs_size error!\n");
169 int dfu_write_medium_mmc(struct dfu_entity *dfu,
170 u64 offset, void *buf, long *len)
174 switch (dfu->layout) {
176 ret = mmc_block_op(DFU_OP_WRITE, dfu, offset, buf, len);
180 ret = mmc_file_buffer(dfu, buf, len);
183 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
184 dfu_get_layout(dfu->layout));
190 int dfu_flush_medium_mmc(struct dfu_entity *dfu)
194 if (dfu->layout != DFU_RAW_ADDR) {
196 ret = mmc_file_op(DFU_OP_WRITE, dfu, dfu_file_buf,
199 /* Now that we're done */
200 dfu_file_buf_len = 0;
206 int dfu_get_medium_size_mmc(struct dfu_entity *dfu, u64 *size)
210 switch (dfu->layout) {
212 *size = dfu->data.mmc.lba_size * dfu->data.mmc.lba_blk_size;
216 dfu_file_buf_filled = -1;
217 ret = mmc_file_op(DFU_OP_SIZE, dfu, NULL, size);
220 if (*size > CONFIG_SYS_DFU_MAX_FILE_SIZE)
224 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
225 dfu_get_layout(dfu->layout));
230 static int mmc_file_unbuffer(struct dfu_entity *dfu, u64 offset, void *buf,
236 if (dfu_file_buf_filled == -1) {
237 ret = mmc_file_op(DFU_OP_READ, dfu, dfu_file_buf, &file_len);
240 dfu_file_buf_filled = file_len;
242 if (offset + *len > dfu_file_buf_filled)
245 /* Add to the current buffer. */
246 memcpy(buf, dfu_file_buf + offset, *len);
251 int dfu_read_medium_mmc(struct dfu_entity *dfu, u64 offset, void *buf,
256 switch (dfu->layout) {
258 ret = mmc_block_op(DFU_OP_READ, dfu, offset, buf, len);
262 ret = mmc_file_unbuffer(dfu, offset, buf, len);
265 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
266 dfu_get_layout(dfu->layout));
272 void dfu_free_entity_mmc(struct dfu_entity *dfu)
281 * @param s Parameter string containing space-separated arguments:
283 * raw (raw read/write)
286 * part (partition image)
288 * lba_start and lba_size, for raw write
289 * mmc_dev and mmc_part, for filesystems and part
291 * mmcpart <num> (access to HW eMMC partitions)
293 int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr, char *s)
295 const char *entity_type;
302 const char **parg = argv;
304 dfu->data.mmc.dev_num = simple_strtoul(devstr, NULL, 10);
306 for (; parg < argv + sizeof(argv) / sizeof(*argv); ++parg) {
307 *parg = strsep(&s, " ");
309 pr_err("Invalid number of arguments.\n");
314 entity_type = argv[0];
316 * Base 0 means we'll accept (prefixed with 0x or 0) base 16, 8,
319 second_arg = simple_strtoul(argv[1], NULL, 0);
320 third_arg = simple_strtoul(argv[2], NULL, 0);
322 mmc = find_mmc_device(dfu->data.mmc.dev_num);
324 pr_err("Couldn't find MMC device no. %d.\n",
325 dfu->data.mmc.dev_num);
330 pr_err("Couldn't init MMC device.\n");
334 dfu->data.mmc.hw_partition = -EINVAL;
335 if (!strcmp(entity_type, "raw")) {
336 dfu->layout = DFU_RAW_ADDR;
337 dfu->data.mmc.lba_start = second_arg;
338 dfu->data.mmc.lba_size = third_arg;
339 dfu->data.mmc.lba_blk_size = mmc->read_bl_len;
342 * Check for an extra entry at dfu_alt_info env variable
343 * specifying the mmc HW defined partition number
346 if (!strcmp(strsep(&s, " "), "mmcpart"))
347 dfu->data.mmc.hw_partition =
348 simple_strtoul(s, NULL, 0);
350 } else if (!strcmp(entity_type, "part")) {
351 disk_partition_t partinfo;
352 struct blk_desc *blk_dev = mmc_get_blk_desc(mmc);
353 int mmcdev = second_arg;
354 int mmcpart = third_arg;
356 if (part_get_info(blk_dev, mmcpart, &partinfo) != 0) {
357 pr_err("Couldn't find part #%d on mmc device #%d\n",
362 dfu->layout = DFU_RAW_ADDR;
363 dfu->data.mmc.lba_start = partinfo.start;
364 dfu->data.mmc.lba_size = partinfo.size;
365 dfu->data.mmc.lba_blk_size = partinfo.blksz;
366 } else if (!strcmp(entity_type, "fat")) {
367 dfu->layout = DFU_FS_FAT;
368 } else if (!strcmp(entity_type, "ext4")) {
369 dfu->layout = DFU_FS_EXT4;
371 pr_err("Memory layout (%s) not supported!\n", entity_type);
375 /* if it's NOT a raw write */
376 if (strcmp(entity_type, "raw")) {
377 dfu->data.mmc.dev = second_arg;
378 dfu->data.mmc.part = third_arg;
381 dfu->dev_type = DFU_DEV_MMC;
382 dfu->get_medium_size = dfu_get_medium_size_mmc;
383 dfu->read_medium = dfu_read_medium_mmc;
384 dfu->write_medium = dfu_write_medium_mmc;
385 dfu->flush_medium = dfu_flush_medium_mmc;
387 dfu->free_entity = dfu_free_entity_mmc;
389 /* Check if file buffer is ready */
391 dfu_file_buf = memalign(CONFIG_SYS_CACHELINE_SIZE,
392 CONFIG_SYS_DFU_MAX_FILE_SIZE);
394 pr_err("Could not memalign 0x%x bytes",
395 CONFIG_SYS_DFU_MAX_FILE_SIZE);