2 * dfu_nand.c -- DFU for NAND routines.
4 * Copyright (C) 2012-2013 Texas Instruments, Inc.
6 * Based on dfu_mmc.c which is:
7 * Copyright (C) 2012 Samsung Electronics
8 * author: Lukasz Majewski <l.majewski@samsung.com>
10 * SPDX-License-Identifier: GPL-2.0+
18 #include <linux/mtd/mtd.h>
19 #include <jffs2/load_kernel.h>
22 static int nand_block_op(enum dfu_op op, struct dfu_entity *dfu,
23 u64 offset, void *buf, long *len)
30 /* if buf == NULL return total size of the area */
32 *len = dfu->data.nand.size;
36 start = dfu->data.nand.start + offset + dfu->bad_skip;
37 lim = dfu->data.nand.start + dfu->data.nand.size - start;
40 mtd = get_nand_dev_by_index(nand_curr_device);
42 if (nand_curr_device < 0 ||
43 nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE ||
45 printf("%s: invalid nand device\n", __func__);
49 if (op == DFU_OP_READ) {
50 ret = nand_read_skip_bad(mtd, start, &count, &actual,
53 nand_erase_options_t opts;
55 memset(&opts, 0, sizeof(opts));
62 ret = nand_erase_opts(mtd, &opts);
66 ret = nand_write_skip_bad(mtd, start, &count, &actual,
67 lim, buf, WITH_WR_VERIFY);
71 printf("%s: nand_%s_skip_bad call failed at %llx!\n",
72 __func__, op == DFU_OP_READ ? "read" : "write",
78 * Find out where we stopped writing data. This can be deeper into
79 * the NAND than we expected due to having to skip bad blocks. So
80 * we must take this into account for the next write, if any.
83 dfu->bad_skip += actual - count;
88 static inline int nand_block_write(struct dfu_entity *dfu,
89 u64 offset, void *buf, long *len)
91 return nand_block_op(DFU_OP_WRITE, dfu, offset, buf, len);
94 static inline int nand_block_read(struct dfu_entity *dfu,
95 u64 offset, void *buf, long *len)
97 return nand_block_op(DFU_OP_READ, dfu, offset, buf, len);
100 static int dfu_write_medium_nand(struct dfu_entity *dfu,
101 u64 offset, void *buf, long *len)
105 switch (dfu->layout) {
107 ret = nand_block_write(dfu, offset, buf, len);
110 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
111 dfu_get_layout(dfu->layout));
117 int dfu_get_medium_size_nand(struct dfu_entity *dfu, u64 *size)
119 *size = dfu->data.nand.size;
124 static int dfu_read_medium_nand(struct dfu_entity *dfu, u64 offset, void *buf,
129 switch (dfu->layout) {
131 ret = nand_block_read(dfu, offset, buf, len);
134 printf("%s: Layout (%s) not (yet) supported!\n", __func__,
135 dfu_get_layout(dfu->layout));
141 static int dfu_flush_medium_nand(struct dfu_entity *dfu)
146 /* in case of ubi partition, erase rest of the partition */
147 if (dfu->data.nand.ubi) {
148 struct mtd_info *mtd = get_nand_dev_by_index(nand_curr_device);
149 nand_erase_options_t opts;
151 if (nand_curr_device < 0 ||
152 nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE ||
154 printf("%s: invalid nand device\n", __func__);
158 memset(&opts, 0, sizeof(opts));
160 if ((off & (mtd->erasesize - 1)) != 0) {
162 * last write ended with unaligned length
163 * sector is erased, jump to next
165 off = off & ~((mtd->erasesize - 1));
166 off += mtd->erasesize;
168 opts.offset = dfu->data.nand.start + off +
170 opts.length = dfu->data.nand.start +
171 dfu->data.nand.size - opts.offset;
172 ret = nand_erase_opts(mtd, &opts);
174 printf("Failure erase: %d\n", ret);
180 unsigned int dfu_polltimeout_nand(struct dfu_entity *dfu)
183 * Currently, Poll Timeout != 0 is only needed on nand
184 * ubi partition, as the not used sectors need an erase
186 if (dfu->data.nand.ubi)
187 return DFU_MANIFEST_POLL_TIMEOUT;
189 return DFU_DEFAULT_POLL_TIMEOUT;
192 int dfu_fill_entity_nand(struct dfu_entity *dfu, char *devstr, char *s)
197 dfu->data.nand.ubi = 0;
198 dfu->dev_type = DFU_DEV_NAND;
199 st = strsep(&s, " ");
200 if (!strcmp(st, "raw")) {
201 dfu->layout = DFU_RAW_ADDR;
202 dfu->data.nand.start = simple_strtoul(s, &s, 16);
204 dfu->data.nand.size = simple_strtoul(s, &s, 16);
205 } else if ((!strcmp(st, "part")) || (!strcmp(st, "partubi"))) {
207 struct mtd_device *mtd_dev;
209 struct part_info *pi;
211 dfu->layout = DFU_RAW_ADDR;
213 dev = simple_strtoul(s, &s, 10);
215 part = simple_strtoul(s, &s, 10);
217 sprintf(mtd_id, "%s%d,%d", "nand", dev, part - 1);
218 printf("using id '%s'\n", mtd_id);
222 ret = find_dev_and_part(mtd_id, &mtd_dev, &part_num, &pi);
224 printf("Could not locate '%s'\n", mtd_id);
228 dfu->data.nand.start = pi->offset;
229 dfu->data.nand.size = pi->size;
230 if (!strcmp(st, "partubi"))
231 dfu->data.nand.ubi = 1;
233 printf("%s: Memory layout (%s) not supported!\n", __func__, st);
237 dfu->get_medium_size = dfu_get_medium_size_nand;
238 dfu->read_medium = dfu_read_medium_nand;
239 dfu->write_medium = dfu_write_medium_nand;
240 dfu->flush_medium = dfu_flush_medium_nand;
241 dfu->poll_timeout = dfu_polltimeout_nand;