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
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2014 Gateworks Corporation
* Author: Tim Harvey <tharvey@gateworks.com>
*/
#include <common.h>
#include <nand.h>
#include <malloc.h>
static struct mtd_info *mtd;
static struct nand_chip nand_chip;
static void mxs_nand_command(struct mtd_info *mtd, unsigned int command,
int column, int page_addr)
{
register struct nand_chip *chip = mtd_to_nand(mtd);
u32 timeo, time_start;
/* write out the command to the device */
chip->cmd_ctrl(mtd, command, NAND_CLE);
/* Serially input address */
if (column != -1) {
chip->cmd_ctrl(mtd, column, NAND_ALE);
chip->cmd_ctrl(mtd, column >> 8, NAND_ALE);
}
if (page_addr != -1) {
chip->cmd_ctrl(mtd, page_addr, NAND_ALE);
chip->cmd_ctrl(mtd, page_addr >> 8, NAND_ALE);
/* One more address cycle for devices > 128MiB */
if (chip->chipsize > (128 << 20))
chip->cmd_ctrl(mtd, page_addr >> 16, NAND_ALE);
}
chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0);
if (command == NAND_CMD_READ0) {
chip->cmd_ctrl(mtd, NAND_CMD_READSTART, NAND_CLE);
chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0);
}
/* wait for nand ready */
ndelay(100);
timeo = (CONFIG_SYS_HZ * 20) / 1000;
time_start = get_timer(0);
while (get_timer(time_start) < timeo) {
if (chip->dev_ready(mtd))
break;
}
}
static int mxs_flash_ident(struct mtd_info *mtd)
{
register struct nand_chip *chip = mtd_to_nand(mtd);
int i;
u8 mfg_id, dev_id;
u8 id_data[8];
struct nand_onfi_params *p = &chip->onfi_params;
/* Reset the chip */
chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
/* Send the command for reading device ID */
chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
/* Read manufacturer and device IDs */
mfg_id = chip->read_byte(mtd);
dev_id = chip->read_byte(mtd);
/* Try again to make sure */
chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
for (i = 0; i < 8; i++)
id_data[i] = chip->read_byte(mtd);
if (id_data[0] != mfg_id || id_data[1] != dev_id) {
printf("second ID read did not match");
return -1;
}
debug("0x%02x:0x%02x ", mfg_id, dev_id);
/* read ONFI */
chip->onfi_version = 0;
chip->cmdfunc(mtd, NAND_CMD_READID, 0x20, -1);
if (chip->read_byte(mtd) != 'O' || chip->read_byte(mtd) != 'N' ||
chip->read_byte(mtd) != 'F' || chip->read_byte(mtd) != 'I') {
return -2;
}
/* we have ONFI, probe it */
chip->cmdfunc(mtd, NAND_CMD_PARAM, 0, -1);
chip->read_buf(mtd, (uint8_t *)p, sizeof(*p));
mtd->name = p->model;
mtd->writesize = le32_to_cpu(p->byte_per_page);
mtd->erasesize = le32_to_cpu(p->pages_per_block) * mtd->writesize;
mtd->oobsize = le16_to_cpu(p->spare_bytes_per_page);
chip->chipsize = le32_to_cpu(p->blocks_per_lun);
chip->chipsize *= (uint64_t)mtd->erasesize * p->lun_count;
/* Calculate the address shift from the page size */
chip->page_shift = ffs(mtd->writesize) - 1;
chip->phys_erase_shift = ffs(mtd->erasesize) - 1;
/* Convert chipsize to number of pages per chip -1 */
chip->pagemask = (chip->chipsize >> chip->page_shift) - 1;
chip->badblockbits = 8;
debug("erasesize=%d (>>%d)\n", mtd->erasesize, chip->phys_erase_shift);
debug("writesize=%d (>>%d)\n", mtd->writesize, chip->page_shift);
debug("oobsize=%d\n", mtd->oobsize);
debug("chipsize=%lld\n", chip->chipsize);
return 0;
}
static int mxs_read_page_ecc(struct mtd_info *mtd, void *buf, unsigned int page)
{
register struct nand_chip *chip = mtd_to_nand(mtd);
int ret;
chip->cmdfunc(mtd, NAND_CMD_READ0, 0x0, page);
ret = nand_chip.ecc.read_page(mtd, chip, buf, 1, page);
if (ret < 0) {
printf("read_page failed %d\n", ret);
return -1;
}
return 0;
}
static int is_badblock(struct mtd_info *mtd, loff_t offs, int allowbbt)
{
register struct nand_chip *chip = mtd_to_nand(mtd);
unsigned int block = offs >> chip->phys_erase_shift;
unsigned int page = offs >> chip->page_shift;
debug("%s offs=0x%08x block:%d page:%d\n", __func__, (int)offs, block,
page);
chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize, page);
memset(chip->oob_poi, 0, mtd->oobsize);
chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
return chip->oob_poi[0] != 0xff;
}
/* setup mtd and nand structs and init mxs_nand driver */
static int mxs_nand_init(void)
{
/* return if already initalized */
if (nand_chip.numchips)
return 0;
/* init mxs nand driver */
board_nand_init(&nand_chip);
mtd = nand_to_mtd(&nand_chip);
/* set mtd functions */
nand_chip.cmdfunc = mxs_nand_command;
nand_chip.numchips = 1;
/* identify flash device */
if (mxs_flash_ident(mtd)) {
printf("Failed to identify\n");
return -1;
}
/* allocate and initialize buffers */
nand_chip.buffers = memalign(ARCH_DMA_MINALIGN,
sizeof(*nand_chip.buffers));
nand_chip.oob_poi = nand_chip.buffers->databuf + mtd->writesize;
/* setup flash layout (does not scan as we override that) */
mtd->size = nand_chip.chipsize;
nand_chip.scan_bbt(mtd);
return 0;
}
int nand_spl_load_image(uint32_t offs, unsigned int size, void *buf)
{
struct nand_chip *chip;
unsigned int page;
unsigned int nand_page_per_block;
unsigned int sz = 0;
if (mxs_nand_init())
return -ENODEV;
chip = mtd_to_nand(mtd);
page = offs >> chip->page_shift;
nand_page_per_block = mtd->erasesize / mtd->writesize;
debug("%s offset:0x%08x len:%d page:%d\n", __func__, offs, size, page);
size = roundup(size, mtd->writesize);
while (sz < size) {
if (mxs_read_page_ecc(mtd, buf, page) < 0)
return -1;
sz += mtd->writesize;
offs += mtd->writesize;
page++;
buf += mtd->writesize;
/*
* Check if we have crossed a block boundary, and if so
* check for bad block.
*/
if (!(page % nand_page_per_block)) {
/*
* Yes, new block. See if this block is good. If not,
* loop until we find a good block.
*/
while (is_badblock(mtd, offs, 1)) {
page = page + nand_page_per_block;
/* Check i we've reached the end of flash. */
if (page >= mtd->size >> chip->page_shift)
return -ENOMEM;
}
}
}
return 0;
}
int nand_default_bbt(struct mtd_info *mtd)
{
return 0;
}
void nand_init(void)
{
}
void nand_deselect(void)
{
}
|
