1 // SPDX-License-Identifier: GPL-2.0+
3 * dfu_nand.c -- DFU for NAND routines.
5 * Copyright (C) 2012-2013 Texas Instruments, Inc.
7 * Based on dfu_mmc.c which is:
8 * Copyright (C) 2012 Samsung Electronics
9 * author: Lukasz Majewski <l.majewski@samsung.com>
17 #include <linux/mtd/mtd.h>
18 #include <jffs2/load_kernel.h>
21 static int nand_block_op(enum dfu_op op, struct dfu_entity *dfu,
22 u64 offset, void *buf, long *len)
29 /* if buf == NULL return total size of the area */
31 *len = dfu->data.nand.size;
35 start = dfu->data.nand.start + offset + dfu->bad_skip;
36 lim = dfu->data.nand.start + dfu->data.nand.size - start;
39 mtd = get_nand_dev_by_index(nand_curr_device);
41 if (nand_curr_device < 0 ||
42 nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE ||
44 printf("%s: invalid nand device\n", __func__);
48 if (op == DFU_OP_READ) {
49 ret = nand_read_skip_bad(mtd, start, &count, &actual,
52 nand_erase_options_t opts;
53 int write_flags = WITH_WR_VERIFY;
55 memset(&opts, 0, sizeof(opts));
62 ret = nand_erase_opts(mtd, &opts);
66 #ifdef CONFIG_DFU_NAND_TRIMFFS
67 if (dfu->data.nand.ubi)
68 write_flags |= WITH_DROP_FFS;
70 ret = nand_write_skip_bad(mtd, start, &count, &actual,
71 lim, buf, write_flags);
75 printf("%s: nand_%s_skip_bad call failed at %llx!\n",
76 __func__, op == DFU_OP_READ ? "read" : "write",
82 * Find out where we stopped writing data. This can be deeper into
83 * the NAND than we expected due to having to skip bad blocks. So
84 * we must take this into account for the next write, if any.
87 dfu->bad_skip += actual - count;
92 static inline int nand_block_write(struct dfu_entity *dfu,
93 u64 offset, void *buf, long *len)
95 return nand_block_op(DFU_OP_WRITE, dfu, offset, buf, len);
98 static inline int nand_block_read(struct dfu_entity *dfu,
99 u64 offset, void *buf, long *len)
101 return nand_block_op(DFU_OP_READ, dfu, offset, buf, len);
104 static int dfu_write_medium_nand(struct dfu_entity *dfu,
105 u64 offset, void *buf, long *len)
109 switch (dfu->layout) {
111 ret = nand_block_write(dfu, offset, buf, len);
114 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
115 dfu_get_layout(dfu->layout));
121 int dfu_get_medium_size_nand(struct dfu_entity *dfu, u64 *size)
123 *size = dfu->data.nand.size;
128 static int dfu_read_medium_nand(struct dfu_entity *dfu, u64 offset, void *buf,
133 switch (dfu->layout) {
135 ret = nand_block_read(dfu, offset, buf, len);
138 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
139 dfu_get_layout(dfu->layout));
145 static int dfu_flush_medium_nand(struct dfu_entity *dfu)
150 /* in case of ubi partition, erase rest of the partition */
151 if (dfu->data.nand.ubi) {
152 struct mtd_info *mtd = get_nand_dev_by_index(nand_curr_device);
153 nand_erase_options_t opts;
155 if (nand_curr_device < 0 ||
156 nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE ||
158 printf("%s: invalid nand device\n", __func__);
162 memset(&opts, 0, sizeof(opts));
164 if ((off & (mtd->erasesize - 1)) != 0) {
166 * last write ended with unaligned length
167 * sector is erased, jump to next
169 off = off & ~((mtd->erasesize - 1));
170 off += mtd->erasesize;
172 opts.offset = dfu->data.nand.start + off +
174 opts.length = dfu->data.nand.start +
175 dfu->data.nand.size - opts.offset;
176 ret = nand_erase_opts(mtd, &opts);
178 printf("Failure erase: %d\n", ret);
184 unsigned int dfu_polltimeout_nand(struct dfu_entity *dfu)
187 * Currently, Poll Timeout != 0 is only needed on nand
188 * ubi partition, as the not used sectors need an erase
190 if (dfu->data.nand.ubi)
191 return DFU_MANIFEST_POLL_TIMEOUT;
193 return DFU_DEFAULT_POLL_TIMEOUT;
196 int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr, char *s)
201 dfu->data.nand.ubi = 0;
202 dfu->dev_type = DFU_DEV_NAND;
203 st = strsep(&s, " ");
204 if (!strcmp(st, "raw")) {
205 dfu->layout = DFU_RAW_ADDR;
206 dfu->data.nand.start = simple_strtoul(s, &s, 16);
208 dfu->data.nand.size = simple_strtoul(s, &s, 16);
209 } else if ((!strcmp(st, "part")) || (!strcmp(st, "partubi"))) {
211 struct mtd_device *mtd_dev;
213 struct part_info *pi;
215 dfu->layout = DFU_RAW_ADDR;
217 dev = simple_strtoul(s, &s, 10);
219 part = simple_strtoul(s, &s, 10);
221 sprintf(mtd_id, "%s%d,%d", "nand", dev, part - 1);
222 debug("using id '%s'\n", mtd_id);
226 ret = find_dev_and_part(mtd_id, &mtd_dev, &part_num, &pi);
228 printf("Could not locate '%s'\n", mtd_id);
232 dfu->data.nand.start = pi->offset;
233 dfu->data.nand.size = pi->size;
234 if (!strcmp(st, "partubi"))
235 dfu->data.nand.ubi = 1;
237 printf("%s: Memory layout (%s) not supported!\n", __func__, st);
241 dfu->get_medium_size = dfu_get_medium_size_nand;
242 dfu->read_medium = dfu_read_medium_nand;
243 dfu->write_medium = dfu_write_medium_nand;
244 dfu->flush_medium = dfu_flush_medium_nand;
245 dfu->poll_timeout = dfu_polltimeout_nand;