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
|
/*
* (C) Copyright 2015
* Kamil Lulko, <kamil.lulko@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/stm32.h>
#include "stm32_flash.h"
flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
#define STM32_FLASH ((struct stm32_flash_regs *)FLASH_CNTL_BASE)
void stm32_flash_latency_cfg(int latency)
{
/* 5 wait states, Prefetch enabled, D-Cache enabled, I-Cache enabled */
writel(FLASH_ACR_WS(latency) | FLASH_ACR_PRFTEN | FLASH_ACR_ICEN
| FLASH_ACR_DCEN, &STM32_FLASH->acr);
}
static void stm32_flash_lock(u8 lock)
{
if (lock) {
setbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_LOCK);
} else {
writel(STM32_FLASH_KEY1, &STM32_FLASH->key);
writel(STM32_FLASH_KEY2, &STM32_FLASH->key);
}
}
unsigned long flash_init(void)
{
unsigned long total_size = 0;
u8 i, j;
for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
flash_info[i].flash_id = FLASH_STM32;
flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
flash_info[i].start[0] = CONFIG_SYS_FLASH_BASE + (i << 20);
flash_info[i].size = sect_sz_kb[0];
for (j = 1; j < CONFIG_SYS_MAX_FLASH_SECT; j++) {
flash_info[i].start[j] = flash_info[i].start[j - 1]
+ (sect_sz_kb[j - 1]);
flash_info[i].size += sect_sz_kb[j];
}
total_size += flash_info[i].size;
}
return total_size;
}
void flash_print_info(flash_info_t *info)
{
int i;
if (info->flash_id == FLASH_UNKNOWN) {
printf("missing or unknown FLASH type\n");
return;
} else if (info->flash_id == FLASH_STM32) {
printf("stm32 Embedded Flash\n");
}
printf(" Size: %ld MB in %d Sectors\n",
info->size >> 20, info->sector_count);
printf(" Sector Start Addresses:");
for (i = 0; i < info->sector_count; ++i) {
if ((i % 5) == 0)
printf("\n ");
printf(" %08lX%s",
info->start[i],
info->protect[i] ? " (RO)" : " ");
}
printf("\n");
return;
}
int flash_erase(flash_info_t *info, int first, int last)
{
u8 bank = 0xFF;
int i;
for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
if (info == &flash_info[i]) {
bank = i;
break;
}
}
if (bank == 0xFF)
return -1;
stm32_flash_lock(0);
for (i = first; i <= last; i++) {
while (readl(&STM32_FLASH->sr) & STM32_FLASH_SR_BSY)
;
/* clear old sector number before writing a new one */
clrbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_SNB_MASK);
if (bank == 0) {
setbits_le32(&STM32_FLASH->cr,
(i << STM32_FLASH_CR_SNB_OFFSET));
} else if (bank == 1) {
setbits_le32(&STM32_FLASH->cr,
((0x10 | i) << STM32_FLASH_CR_SNB_OFFSET));
} else {
stm32_flash_lock(1);
return -1;
}
setbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_SER);
setbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_STRT);
while (readl(&STM32_FLASH->sr) & STM32_FLASH_SR_BSY)
;
clrbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_SER);
}
stm32_flash_lock(1);
return 0;
}
int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
ulong i;
while (readl(&STM32_FLASH->sr) & STM32_FLASH_SR_BSY)
;
stm32_flash_lock(0);
setbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_PG);
/* To make things simple use byte writes only */
for (i = 0; i < cnt; i++) {
*(uchar *)(addr + i) = src[i];
/* avoid re-ordering flash data write and busy status
* check as flash memory space attributes are generally Normal
*/
mb();
while (readl(&STM32_FLASH->sr) & STM32_FLASH_SR_BSY)
;
}
clrbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_PG);
stm32_flash_lock(1);
return 0;
}
|
