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 const char *fsname, *opname;
112 char cmd_buf[DFU_CMD_BUF_SIZE];
116 switch (dfu->layout) {
124 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
125 dfu_get_layout(dfu->layout));
143 sprintf(cmd_buf, "%s%s mmc %d:%d", fsname, opname,
144 dfu->data.mmc.dev, dfu->data.mmc.part);
146 if (op != DFU_OP_SIZE)
147 sprintf(cmd_buf + strlen(cmd_buf), " %p", buf);
149 sprintf(cmd_buf + strlen(cmd_buf), " %s", dfu->name);
151 if (op == DFU_OP_WRITE)
152 sprintf(cmd_buf + strlen(cmd_buf), " %llx", *len);
154 debug("%s: %s 0x%p\n", __func__, cmd_buf, cmd_buf);
156 ret = run_command(cmd_buf, 0);
158 puts("dfu: Read error!\n");
162 if (op != DFU_OP_WRITE) {
163 str_env = env_get("filesize");
164 if (str_env == NULL) {
165 puts("dfu: Wrong file size!\n");
168 *len = simple_strtoul(str_env, NULL, 16);
174 int dfu_write_medium_mmc(struct dfu_entity *dfu,
175 u64 offset, void *buf, long *len)
179 switch (dfu->layout) {
181 ret = mmc_block_op(DFU_OP_WRITE, dfu, offset, buf, len);
185 ret = mmc_file_buffer(dfu, buf, len);
188 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
189 dfu_get_layout(dfu->layout));
195 int dfu_flush_medium_mmc(struct dfu_entity *dfu)
199 if (dfu->layout != DFU_RAW_ADDR) {
201 ret = mmc_file_op(DFU_OP_WRITE, dfu, dfu_file_buf,
204 /* Now that we're done */
205 dfu_file_buf_len = 0;
211 int dfu_get_medium_size_mmc(struct dfu_entity *dfu, u64 *size)
215 switch (dfu->layout) {
217 *size = dfu->data.mmc.lba_size * dfu->data.mmc.lba_blk_size;
221 dfu_file_buf_filled = -1;
222 ret = mmc_file_op(DFU_OP_SIZE, dfu, NULL, size);
225 if (*size > CONFIG_SYS_DFU_MAX_FILE_SIZE)
229 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
230 dfu_get_layout(dfu->layout));
235 static int mmc_file_unbuffer(struct dfu_entity *dfu, u64 offset, void *buf,
241 if (dfu_file_buf_filled == -1) {
242 ret = mmc_file_op(DFU_OP_READ, dfu, dfu_file_buf, &file_len);
245 dfu_file_buf_filled = file_len;
247 if (offset + *len > dfu_file_buf_filled)
250 /* Add to the current buffer. */
251 memcpy(buf, dfu_file_buf + offset, *len);
256 int dfu_read_medium_mmc(struct dfu_entity *dfu, u64 offset, void *buf,
261 switch (dfu->layout) {
263 ret = mmc_block_op(DFU_OP_READ, dfu, offset, buf, len);
267 ret = mmc_file_unbuffer(dfu, offset, buf, len);
270 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
271 dfu_get_layout(dfu->layout));
277 void dfu_free_entity_mmc(struct dfu_entity *dfu)
286 * @param s Parameter string containing space-separated arguments:
288 * raw (raw read/write)
291 * part (partition image)
293 * lba_start and lba_size, for raw write
294 * mmc_dev and mmc_part, for filesystems and part
296 * mmcpart <num> (access to HW eMMC partitions)
298 int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr, char *s)
300 const char *entity_type;
307 const char **parg = argv;
309 dfu->data.mmc.dev_num = simple_strtoul(devstr, NULL, 10);
311 for (; parg < argv + sizeof(argv) / sizeof(*argv); ++parg) {
312 *parg = strsep(&s, " ");
314 pr_err("Invalid number of arguments.\n");
319 entity_type = argv[0];
321 * Base 0 means we'll accept (prefixed with 0x or 0) base 16, 8,
324 second_arg = simple_strtoul(argv[1], NULL, 0);
325 third_arg = simple_strtoul(argv[2], NULL, 0);
327 mmc = find_mmc_device(dfu->data.mmc.dev_num);
329 pr_err("Couldn't find MMC device no. %d.\n",
330 dfu->data.mmc.dev_num);
335 pr_err("Couldn't init MMC device.\n");
339 dfu->data.mmc.hw_partition = -EINVAL;
340 if (!strcmp(entity_type, "raw")) {
341 dfu->layout = DFU_RAW_ADDR;
342 dfu->data.mmc.lba_start = second_arg;
343 dfu->data.mmc.lba_size = third_arg;
344 dfu->data.mmc.lba_blk_size = mmc->read_bl_len;
347 * Check for an extra entry at dfu_alt_info env variable
348 * specifying the mmc HW defined partition number
351 if (!strcmp(strsep(&s, " "), "mmcpart"))
352 dfu->data.mmc.hw_partition =
353 simple_strtoul(s, NULL, 0);
355 } else if (!strcmp(entity_type, "part")) {
356 disk_partition_t partinfo;
357 struct blk_desc *blk_dev = mmc_get_blk_desc(mmc);
358 int mmcdev = second_arg;
359 int mmcpart = third_arg;
361 if (part_get_info(blk_dev, mmcpart, &partinfo) != 0) {
362 pr_err("Couldn't find part #%d on mmc device #%d\n",
367 dfu->layout = DFU_RAW_ADDR;
368 dfu->data.mmc.lba_start = partinfo.start;
369 dfu->data.mmc.lba_size = partinfo.size;
370 dfu->data.mmc.lba_blk_size = partinfo.blksz;
371 } else if (!strcmp(entity_type, "fat")) {
372 dfu->layout = DFU_FS_FAT;
373 } else if (!strcmp(entity_type, "ext4")) {
374 dfu->layout = DFU_FS_EXT4;
376 pr_err("Memory layout (%s) not supported!\n", entity_type);
380 /* if it's NOT a raw write */
381 if (strcmp(entity_type, "raw")) {
382 dfu->data.mmc.dev = second_arg;
383 dfu->data.mmc.part = third_arg;
386 dfu->dev_type = DFU_DEV_MMC;
387 dfu->get_medium_size = dfu_get_medium_size_mmc;
388 dfu->read_medium = dfu_read_medium_mmc;
389 dfu->write_medium = dfu_write_medium_mmc;
390 dfu->flush_medium = dfu_flush_medium_mmc;
392 dfu->free_entity = dfu_free_entity_mmc;
394 /* Check if file buffer is ready */
396 dfu_file_buf = memalign(CONFIG_SYS_CACHELINE_SIZE,
397 CONFIG_SYS_DFU_MAX_FILE_SIZE);
399 pr_err("Could not memalign 0x%x bytes",
400 CONFIG_SYS_DFU_MAX_FILE_SIZE);