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
|
/*
* Overview:
* Platform independend driver for NDFC (NanD Flash Controller)
* integrated into EP440 cores
*
* (C) Copyright 2006
* Stefan Roese, DENX Software Engineering, sr@denx.de.
*
* Based on original work by
* Thomas Gleixner
* Copyright 2006 IBM
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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>
#if (CONFIG_COMMANDS & CFG_CMD_NAND) && !defined(CFG_NAND_LEGACY) && \
(defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
defined(CONFIG_440EPX) || defined(CONFIG_440GRX))
#include <nand.h>
#include <linux/mtd/ndfc.h>
#include <asm/processor.h>
#include <ppc440.h>
static u8 hwctl = 0;
static void ndfc_hwcontrol(struct mtd_info *mtdinfo, int cmd)
{
switch (cmd) {
case NAND_CTL_SETCLE:
hwctl |= 0x1;
break;
case NAND_CTL_CLRCLE:
hwctl &= ~0x1;
break;
case NAND_CTL_SETALE:
hwctl |= 0x2;
break;
case NAND_CTL_CLRALE:
hwctl &= ~0x2;
break;
}
}
static void ndfc_write_byte(struct mtd_info *mtdinfo, u_char byte)
{
struct nand_chip *this = mtdinfo->priv;
ulong base = (ulong) this->IO_ADDR_W;
if (hwctl & 0x1)
out8(base + NDFC_CMD, byte);
else if (hwctl & 0x2)
out8(base + NDFC_ALE, byte);
else
out8(base + NDFC_DATA, byte);
}
static u_char ndfc_read_byte(struct mtd_info *mtdinfo)
{
struct nand_chip *this = mtdinfo->priv;
ulong base = (ulong) this->IO_ADDR_W;
return (in8(base + NDFC_DATA));
}
static int ndfc_dev_ready(struct mtd_info *mtdinfo)
{
struct nand_chip *this = mtdinfo->priv;
ulong base = (ulong) this->IO_ADDR_W;
while (!(in32(base + NDFC_STAT) & NDFC_STAT_IS_READY))
;
return 1;
}
#ifndef CONFIG_NAND_SPL
/*
* Don't use these speedup functions in NAND boot image, since the image
* has to fit into 4kByte.
*/
/*
* Speedups for buffer read/write/verify
*
* NDFC allows 32bit read/write of data. So we can speed up the buffer
* functions. No further checking, as nand_base will always read/write
* page aligned.
*/
static void ndfc_read_buf(struct mtd_info *mtdinfo, uint8_t *buf, int len)
{
struct nand_chip *this = mtdinfo->priv;
ulong base = (ulong) this->IO_ADDR_W;
uint32_t *p = (uint32_t *) buf;
for(;len > 0; len -= 4)
*p++ = in32(base + NDFC_DATA);
}
static void ndfc_write_buf(struct mtd_info *mtdinfo, const uint8_t *buf, int len)
{
struct nand_chip *this = mtdinfo->priv;
ulong base = (ulong) this->IO_ADDR_W;
uint32_t *p = (uint32_t *) buf;
for(; len > 0; len -= 4)
out32(base + NDFC_DATA, *p++);
}
static int ndfc_verify_buf(struct mtd_info *mtdinfo, const uint8_t *buf, int len)
{
struct nand_chip *this = mtdinfo->priv;
ulong base = (ulong) this->IO_ADDR_W;
uint32_t *p = (uint32_t *) buf;
for(; len > 0; len -= 4)
if (*p++ != in32(base + NDFC_DATA))
return -1;
return 0;
}
#endif /* #ifndef CONFIG_NAND_SPL */
void board_nand_init(struct nand_chip *nand)
{
nand->eccmode = NAND_ECC_SOFT;
nand->hwcontrol = ndfc_hwcontrol;
nand->read_byte = ndfc_read_byte;
nand->write_byte = ndfc_write_byte;
nand->dev_ready = ndfc_dev_ready;
#ifndef CONFIG_NAND_SPL
nand->write_buf = ndfc_write_buf;
nand->read_buf = ndfc_read_buf;
nand->verify_buf = ndfc_verify_buf;
#else
/*
* Setup EBC (CS0 only right now)
*/
mtdcr(ebccfga, xbcfg);
mtdcr(ebccfgd, 0xb8400000);
mtebc(pb0cr, CFG_EBC_PB0CR);
mtebc(pb0ap, CFG_EBC_PB0AP);
#endif
/* Set NandFlash Core Configuration Register */
/* Chip select 3, 1col x 2 rows */
out32(CFG_NAND_BASE + NDFC_CCR, 0x00000000 | (CFG_NAND_CS << 24));
out32(CFG_NAND_BASE + NDFC_BCFG0 + (CFG_NAND_CS << 2), 0x80002222);
}
#endif
|
