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
|
/*
* sst28sf040.c: driver for SST28SF040C flash models.
*
*
* Copyright 2000 Silicon Integrated System Corporation
* Copyright 2005 coresystems GmbH <stepan@openbios.org>
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* Reference:
* 8 MEgabit (1024K x 8) SHARP LHF00L04, data sheet
*
*/
#include <stdio.h>
#include <stdint.h>
#include "flash.h"
#include "debug.h"
#define AUTO_PG_ERASE1 0x20
#define AUTO_PG_ERASE2 0xD0
#define AUTO_PGRM 0x10
#define CHIP_ERASE 0x30
#define RESET 0xFF
#define READ_ID 0x90
static __inline__ void protect_lhf00l04(volatile uint8_t *bios)
{
/* ask compiler not to optimize this */
// volatile uint8_t tmp;
}
static __inline__ void unprotect_lhf00l04(volatile uint8_t *bios)
{
/* ask compiler not to optimize this */
// volatile uint8_t tmp;
}
static __inline__ int erase_sector_lhf00l04(volatile uint8_t *bios,
unsigned long address)
{
return (0);
}
static __inline__ int write_sector_lhf00l04(volatile uint8_t *bios,
uint8_t *src,
volatile uint8_t *dst,
unsigned int page_size)
{
int i;
for (i = 0; i < page_size; i++) {
/* transfer data from source to destination */
if (*src == 0xFF) {
dst++, src++;
/* If the data is 0xFF, don't program it */
continue;
}
/*issue AUTO PROGRAM command */
*dst = AUTO_PGRM;
*dst++ = *src++;
/* wait for Toggle bit ready */
// toggle_ready_jedec(bios);
}
return (0);
}
int probe_lhf00l04(struct flashchip *flash)
{
volatile uint8_t *bios = flash->virt_addr;
uint8_t id1, id2, tmp;
/* save the value at the beginning of the Flash */
tmp = *bios;
*bios = RESET;
myusec_delay(10);
*bios = READ_ID;
myusec_delay(10);
id1 = *(volatile uint8_t *) bios;
myusec_delay(10);
id2 = *(volatile uint8_t *) (bios + 0x01);
*bios = RESET;
myusec_delay(10);
printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
if (id1 == flash->manufacture_id && id2 == flash->model_id)
return 1;
/* if there is no lhf00l04, restore the original value */
*bios = tmp;
return 0;
}
int erase_lhf00l04(struct flashchip *flash)
{
volatile uint8_t *bios = flash->virt_addr;
unprotect_lhf00l04(bios);
*bios = CHIP_ERASE;
*bios = CHIP_ERASE;
protect_lhf00l04(bios);
myusec_delay(10);
// toggle_ready_jedec(bios);
return (0);
}
int write_lhf00l04(struct flashchip *flash, uint8_t *buf)
{
int i;
int total_size = flash->total_size * 1024, page_size =
flash->page_size;
volatile uint8_t *bios = flash->virt_addr;
unprotect_lhf00l04(bios);
printf("Programming Page: ");
for (i = 0; i < total_size / page_size; i++) {
/* erase the page before programming */
erase_sector_lhf00l04(bios, i * page_size);
/* write to the sector */
printf("%04d at address: 0x%08x", i, i * page_size);
write_sector_lhf00l04(bios, buf + i * page_size,
bios + i * page_size, page_size);
printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
}
printf("\n");
protect_lhf00l04(bios);
return (0);
}
|
