summaryrefslogtreecommitdiff
path: root/drivers/dfu/dfu_mmc.c
blob: e7ee0770c202ea727730863fb69910b27117dbb2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
/*
 * dfu.c -- DFU back-end routines
 *
 * Copyright (C) 2012 Samsung Electronics
 * author: Lukasz Majewski <l.majewski@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <common.h>
#include <malloc.h>
#include <errno.h>
#include <div64.h>
#include <dfu.h>

enum dfu_mmc_op {
	DFU_OP_READ = 1,
	DFU_OP_WRITE,
};

static unsigned char __aligned(CONFIG_SYS_CACHELINE_SIZE)
				dfu_file_buf[CONFIG_SYS_DFU_MAX_FILE_SIZE];
static long dfu_file_buf_len;

static int mmc_block_op(enum dfu_mmc_op op, struct dfu_entity *dfu,
			u64 offset, void *buf, long *len)
{
	char cmd_buf[DFU_CMD_BUF_SIZE];
	u32 blk_start, blk_count;

	/*
	 * We must ensure that we work in lba_blk_size chunks, so ALIGN
	 * this value.
	 */
	*len = ALIGN(*len, dfu->data.mmc.lba_blk_size);

	blk_start = dfu->data.mmc.lba_start +
			(u32)lldiv(offset, dfu->data.mmc.lba_blk_size);
	blk_count = *len / dfu->data.mmc.lba_blk_size;
	if (blk_start + blk_count >
			dfu->data.mmc.lba_start + dfu->data.mmc.lba_size) {
		puts("Request would exceed designated area!\n");
		return -EINVAL;
	}

	sprintf(cmd_buf, "mmc %s %p %x %x",
		op == DFU_OP_READ ? "read" : "write",
		 buf, blk_start, blk_count);

	debug("%s: %s 0x%p\n", __func__, cmd_buf, cmd_buf);
	return run_command(cmd_buf, 0);
}

static int mmc_file_buffer(struct dfu_entity *dfu, void *buf, long *len)
{
	if (dfu_file_buf_len + *len > CONFIG_SYS_DFU_MAX_FILE_SIZE) {
		dfu_file_buf_len = 0;
		return -EINVAL;
	}

	/* Add to the current buffer. */
	memcpy(dfu_file_buf + dfu_file_buf_len, buf, *len);
	dfu_file_buf_len += *len;

	return 0;
}

static int mmc_file_op(enum dfu_mmc_op op, struct dfu_entity *dfu,
			void *buf, long *len)
{
	char cmd_buf[DFU_CMD_BUF_SIZE];
	char *str_env;
	int ret;

	switch (dfu->layout) {
	case DFU_FS_FAT:
		sprintf(cmd_buf, "fat%s mmc %d:%d 0x%x %s",
			op == DFU_OP_READ ? "load" : "write",
			dfu->data.mmc.dev, dfu->data.mmc.part,
			(unsigned int) buf, dfu->name);
		if (op == DFU_OP_WRITE)
			sprintf(cmd_buf + strlen(cmd_buf), " %lx", *len);
		break;
	case DFU_FS_EXT4:
		sprintf(cmd_buf, "ext4%s mmc %d:%d 0x%x /%s",
			op == DFU_OP_READ ? "load" : "write",
			dfu->data.mmc.dev, dfu->data.mmc.part,
			(unsigned int) buf, dfu->name);
		if (op == DFU_OP_WRITE)
			sprintf(cmd_buf + strlen(cmd_buf), " %ld", *len);
		break;
	default:
		printf("%s: Layout (%s) not (yet) supported!\n", __func__,
		       dfu_get_layout(dfu->layout));
		return -1;
	}

	debug("%s: %s 0x%p\n", __func__, cmd_buf, cmd_buf);

	ret = run_command(cmd_buf, 0);
	if (ret) {
		puts("dfu: Read error!\n");
		return ret;
	}

	if (dfu->layout != DFU_RAW_ADDR && op == DFU_OP_READ) {
		str_env = getenv("filesize");
		if (str_env == NULL) {
			puts("dfu: Wrong file size!\n");
			return -1;
		}
		*len = simple_strtoul(str_env, NULL, 16);
	}

	return ret;
}

int dfu_write_medium_mmc(struct dfu_entity *dfu,
		u64 offset, void *buf, long *len)
{
	int ret = -1;

	switch (dfu->layout) {
	case DFU_RAW_ADDR:
		ret = mmc_block_op(DFU_OP_WRITE, dfu, offset, buf, len);
		break;
	case DFU_FS_FAT:
	case DFU_FS_EXT4:
		ret = mmc_file_buffer(dfu, buf, len);
		break;
	default:
		printf("%s: Layout (%s) not (yet) supported!\n", __func__,
		       dfu_get_layout(dfu->layout));
	}

	return ret;
}

int dfu_flush_medium_mmc(struct dfu_entity *dfu)
{
	int ret = 0;

	if (dfu->layout != DFU_RAW_ADDR) {
		/* Do stuff here. */
		ret = mmc_file_op(DFU_OP_WRITE, dfu, &dfu_file_buf,
				&dfu_file_buf_len);

		/* Now that we're done */
		dfu_file_buf_len = 0;
	}

	return ret;
}

int dfu_read_medium_mmc(struct dfu_entity *dfu, u64 offset, void *buf,
		long *len)
{
	int ret = -1;

	switch (dfu->layout) {
	case DFU_RAW_ADDR:
		ret = mmc_block_op(DFU_OP_READ, dfu, offset, buf, len);
		break;
	case DFU_FS_FAT:
	case DFU_FS_EXT4:
		ret = mmc_file_op(DFU_OP_READ, dfu, buf, len);
		break;
	default:
		printf("%s: Layout (%s) not (yet) supported!\n", __func__,
		       dfu_get_layout(dfu->layout));
	}

	return ret;
}

int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *s)
{
	int dev, part;
	struct mmc *mmc;
	block_dev_desc_t *blk_dev;
	disk_partition_t partinfo;
	char *st;

	dfu->dev_type = DFU_DEV_MMC;
	st = strsep(&s, " ");
	if (!strcmp(st, "mmc")) {
		dfu->layout = DFU_RAW_ADDR;
		dfu->data.mmc.lba_start = simple_strtoul(s, &s, 16);
		dfu->data.mmc.lba_size = simple_strtoul(++s, &s, 16);
		dfu->data.mmc.lba_blk_size = get_mmc_blk_size(dfu->dev_num);
	} else if (!strcmp(st, "fat")) {
		dfu->layout = DFU_FS_FAT;
	} else if (!strcmp(st, "ext4")) {
		dfu->layout = DFU_FS_EXT4;
	} else if (!strcmp(st, "part")) {

		dfu->layout = DFU_RAW_ADDR;

		dev = simple_strtoul(s, &s, 10);
		s++;
		part = simple_strtoul(s, &s, 10);

		mmc = find_mmc_device(dev);
		if (mmc == NULL || mmc_init(mmc)) {
			printf("%s: could not find mmc device #%d!\n",
			       __func__, dev);
			return -ENODEV;
		}

		blk_dev = &mmc->block_dev;
		if (get_partition_info(blk_dev, part, &partinfo) != 0) {
			printf("%s: could not find partition #%d on mmc device #%d!\n",
			       __func__, part, dev);
			return -ENODEV;
		}

		dfu->data.mmc.lba_start = partinfo.start;
		dfu->data.mmc.lba_size = partinfo.size;
		dfu->data.mmc.lba_blk_size = partinfo.blksz;

	} else {
		printf("%s: Memory layout (%s) not supported!\n", __func__, st);
		return -ENODEV;
	}

	if (dfu->layout == DFU_FS_EXT4 || dfu->layout == DFU_FS_FAT) {
		dfu->data.mmc.dev = simple_strtoul(s, &s, 10);
		dfu->data.mmc.part = simple_strtoul(++s, &s, 10);
	}

	dfu->read_medium = dfu_read_medium_mmc;
	dfu->write_medium = dfu_write_medium_mmc;
	dfu->flush_medium = dfu_flush_medium_mmc;

	/* initial state */
	dfu->inited = 0;

	return 0;
}