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
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
|
/******************************************************************************
*
* Copyright (c) 2007 Windond Electronics Corp.
* All rights reserved.
*
* $Workfile: cfi.c $
*
*
******************************************************************************/
//#include <stdio.h>
//#include <string.h>
//#include <stdlib.h>
//#include "wblib.h"
#include <asm/arch/flash.h>
#include <linux/types.h>
#include <linux/slab.h>
#include "cfi.h"
//#include "platform.h"
//#define FLASH_BASE 0xFF000000
#define MAX_REGION_NUM 10
static unsigned short cfiCmdSet = 0;
static unsigned short cfiExtTab = 0;
static unsigned int cfiDevSize = 0;
static unsigned short cfiNumEraseBlkRegion = 0;
static struct cfi_erase_block_region_info cfiEraseBlkRegionInfo[MAX_REGION_NUM];
static int dummyErase(unsigned int address, unsigned int size);
static int dummyWrite(unsigned int address, unsigned char *data, unsigned int size);
struct cfi_command cfiCmd = {
write: dummyWrite,
erase: dummyErase,
};
/* Retrun 0: OK, otherwise: CFI not found */
static int cfiCheckIdent(void)
{
unsigned short i[3];
CFI_READ(FLASH_BASE, 0x10, i[0]);
CFI_READ(FLASH_BASE, 0x11, i[1]);
CFI_READ(FLASH_BASE, 0x12, i[2]);
if(i[0] == 'Q' && i[1] == 'R' && i[2] == 'Y')
return(0);
else
return(-1);
}
unsigned int cfiGetFlashSize(void)
{
return(cfiDevSize);
}
unsigned int cfiGetBlockSize(unsigned int address)
{
int i, offset = 0;
address = (address | 0x80000000) - (FLASH_BASE | 0x80000000);
//printk("addr %x %x\n", address, FLASH_BASE);
for(i = 0; i < cfiNumEraseBlkRegion; i++) {
if(address < (offset += (cfiEraseBlkRegionInfo[i].num * cfiEraseBlkRegionInfo[i].size)))
return(cfiEraseBlkRegionInfo[i].size);
}
//uprintf("get size error\n");
return(0);
}
static void flushDCache(void)
{
if( *(unsigned int volatile *)(0xFFF02000) & 0x6 ) /* If write buffer or data cache is enabled */
{
*(unsigned int volatile *)(0xFFF02004) = 0x86;
while( *(unsigned int volatile *)(0xFFF02004));
}
}
static int polling16(unsigned int addr, unsigned short data)
{
unsigned short rdata;
int timeout = 0x600000;
rdata = *(unsigned short volatile *)(addr);
while( rdata != data )
{
rdata = *(unsigned short volatile *)(addr);
if( !(timeout--) )
{
rdata = *(unsigned short volatile *)(addr);
if( rdata != data )
{
//printf("timeout\n");
return -1;
}
}
}
return 0;
}
static int intelWrite(unsigned int address, unsigned char *data, unsigned int size)
{
unsigned int i;
int status = 0;
address |= 0x80000000;
for(i = address; i < address + size; i += 2)
{
CFI_WRITE(i, 0, 0x40);
CFI_WRITE(i, 0, *(unsigned short *)data);
CFI_WRITE(address, 0, 0x70);
while(!( *(unsigned short *)(address) & 0x80));
if(*(unsigned short *)(address) & 0x19) {
status = -1;
goto exit;
}
data+=2;
}
exit:
CFI_WRITE(address,0,0xFF);
flushDCache();
return(status);
}
static int dummyWrite(unsigned int address, unsigned char *data, unsigned int size)
{
printk("Dummy Write\n");
return(-1);
}
static int amdWrite(unsigned int address, unsigned char *data, unsigned int size)
{
int status;
unsigned int i;
address |= 0x80000000;
for(i = address; i < address+size; i += 2)
{
CFI_WRITE(FLASH_BASE, 0x555, 0xAA);
CFI_WRITE(FLASH_BASE, 0x2AA, 0x55);
CFI_WRITE(FLASH_BASE, 0x555, 0xA0);
CFI_WRITE(i, 0, *(unsigned short *)data);
status = polling16( i, *(unsigned short *)data);
if(status < 0) {
printk("write failed, time out!\n");
return(status); // time-out
}
data+=2;
}
flushDCache();
return(0);
}
static int intelErase(unsigned int address, unsigned int size)
{
int status = 0;
address|=0x80000000;
CFI_WRITE(address, 0, 0x50); // Clear sttaus register
CFI_WRITE(address, 0, 0x20);
CFI_WRITE(address, 0, 0xD0);
CFI_WRITE(address, 0, 0x70);
while(!( *(unsigned short *)(address) & 0x80));
if(*(unsigned short *)(address) & 0x39)
status = -1;
CFI_WRITE(address, 0, 0xFF);
flushDCache();
return(status);
}
static int dummyErase(unsigned int address, unsigned int size)
{
printk("Dummy Erase\n");
return(-1);
}
static int amdErase(unsigned int address, unsigned int size)
{
int status;
//printk("erase addr: %x\n", address);
if((address & (size - 1)) != 0x0)
return -1;// not in the start of a block
address |= 0x80000000;
//printf("erase addr: %08x\n", address);
CFI_WRITE(FLASH_BASE, 0x555, 0xAA);
CFI_WRITE(FLASH_BASE, 0x2AA, 0x55);
CFI_WRITE(FLASH_BASE, 0x555, 0x80);
CFI_WRITE(FLASH_BASE, 0x555, 0xAA);
CFI_WRITE(FLASH_BASE, 0x2AA, 0x55);
CFI_WRITE(address, 0, 0x30);
status = polling16(address, 0xFFFF);
CFI_WRITE(FLASH_BASE, 0, 0xFF);
flushDCache();
if(status < 0)
printk("erase failed, time out!\n");
return(status);
}
int cfiGetFlashInfo(void)
{
unsigned int i;
// goes into query mode
DESELECT_QUERY_MODE(FLASH_BASE);
SELECT_QUERY_MODE(FLASH_BASE);
if(cfiCheckIdent() != 0) {
printk("No CFI information found\n");
goto exit;
}
CFI_READ(FLASH_BASE, 0x13, cfiCmdSet);
CFI_READ(FLASH_BASE, 0x15, cfiExtTab);
CFI_READ(FLASH_BASE, 0x27, cfiDevSize);
cfiDevSize = 1 << cfiDevSize;
CFI_READ(FLASH_BASE, 0x2C, cfiNumEraseBlkRegion);
//cfiEraseBlkRegionInfo = (struct cfi_erase_block_region_info *)malloc(sizeof(struct cfi_erase_block_region_info) * cfiNumEraseBlkRegion);
if(cfiNumEraseBlkRegion > MAX_REGION_NUM) {
//sysprintf("Out of memory\n");
goto exit;
}
for(i = 0; i < cfiNumEraseBlkRegion * 4; i += 4) {
unsigned short s1, s2;
CFI_READ(FLASH_BASE, 0x2D + i, s1);
CFI_READ(FLASH_BASE, 0x2E + i, s2);
cfiEraseBlkRegionInfo[i/4].num = s1 + (s2 << 8) + 1;
//printk("num %d ", (cfiEraseBlkRegionInfo + i/4)->num);
CFI_READ(FLASH_BASE, 0x2F + i, s1);
CFI_READ(FLASH_BASE, 0x30 + i, s2);
cfiEraseBlkRegionInfo[i/4].size = (s1 + (s2 << 8)) * 256;
//printk("size %x \n", (cfiEraseBlkRegionInfo + i/4)->size);
}
DESELECT_QUERY_MODE(FLASH_BASE);
if(cfiCmdSet == AMD_CMD_SET) {
cfiCmd.write = amdWrite;
cfiCmd.erase = amdErase;
}else if(cfiCmdSet == INTEL_CMD_SET) {
cfiCmd.write = intelWrite;
cfiCmd.erase = intelErase;
} else {
printk("CFI command set %04x not support!\n", cfiCmdSet);
return(-1);
}
printk("CFI command set %04x will be used\n", cfiCmdSet);
exit:
return(0);
}
|
