1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2000-2003
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
7 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
13 #include <asm/immap.h>
15 #ifndef CONFIG_SYS_FLASH_CFI
16 typedef unsigned short FLASH_PORT_WIDTH
;
17 typedef volatile unsigned short FLASH_PORT_WIDTHV
;
19 #define FPW FLASH_PORT_WIDTH
20 #define FPWV FLASH_PORT_WIDTHV
22 #define FLASH_CYCLE1 0x5555
23 #define FLASH_CYCLE2 0x2aaa
25 #define SYNC __asm__("nop")
27 /*-----------------------------------------------------------------------
31 ulong
flash_get_size(FPWV
* addr
, flash_info_t
* info
);
32 int flash_get_offsets(ulong base
, flash_info_t
* info
);
33 int write_word(flash_info_t
* info
, FPWV
* dest
, u16 data
);
34 static inline void spin_wheel(void);
36 flash_info_t flash_info
[CONFIG_SYS_MAX_FLASH_BANKS
];
38 ulong
flash_init(void)
43 fbase
= (ulong
) CONFIG_SYS_FLASH_BASE
;
44 flash_get_size((FPWV
*) fbase
, &flash_info
[0]);
45 flash_get_offsets((ulong
) fbase
, &flash_info
[0]);
46 fbase
+= flash_info
[0].size
;
47 size
+= flash_info
[0].size
;
49 /* Protect monitor and environment sectors */
50 flash_protect(FLAG_PROTECT_SET
,
51 CONFIG_SYS_MONITOR_BASE
,
52 CONFIG_SYS_MONITOR_BASE
+ monitor_flash_len
- 1, &flash_info
[0]);
57 int flash_get_offsets(ulong base
, flash_info_t
* info
)
61 if ((info
->flash_id
& FLASH_VENDMASK
) == FLASH_MAN_SST
) {
63 info
->start
[0] = base
;
65 for (i
= 1; i
< CONFIG_SYS_SST_SECT
; i
++) {
66 info
->start
[i
] = info
->start
[i
- 1]
67 + CONFIG_SYS_SST_SECTSZ
;
75 void flash_print_info(flash_info_t
* info
)
79 switch (info
->flash_id
& FLASH_VENDMASK
) {
84 printf("Unknown Vendor ");
88 switch (info
->flash_id
& FLASH_TYPEMASK
) {
90 printf("SST39VF6401B\n");
93 printf("Unknown Chip Type\n");
97 if (info
->size
> 0x100000) {
100 printf(" Size: %ld", info
->size
>> 20);
102 remainder
= (info
->size
% 0x100000);
105 remainder
= (int)((float)
106 (((float)remainder
/ (float)1024) *
108 printf(".%d ", remainder
);
111 printf("MB in %d Sectors\n", info
->sector_count
);
113 printf(" Size: %ld KB in %d Sectors\n",
114 info
->size
>> 10, info
->sector_count
);
116 printf(" Sector Start Addresses:");
117 for (i
= 0; i
< info
->sector_count
; ++i
) {
121 info
->start
[i
], info
->protect
[i
] ? " (RO)" : " ");
127 * The following code cannot be run from FLASH!
129 ulong
flash_get_size(FPWV
* addr
, flash_info_t
* info
)
133 addr
[FLASH_CYCLE1
] = (FPWV
) 0x00AA00AA; /* for Atmel, Intel ignores this */
134 addr
[FLASH_CYCLE2
] = (FPWV
) 0x00550055; /* for Atmel, Intel ignores this */
135 addr
[FLASH_CYCLE1
] = (FPWV
) 0x00900090; /* selects Intel or Atmel */
137 switch (addr
[0] & 0xffff) {
138 case (u8
) SST_MANUFACT
:
139 info
->flash_id
= FLASH_MAN_SST
;
143 printf("Unknown Flash\n");
144 info
->flash_id
= FLASH_UNKNOWN
;
145 info
->sector_count
= 0;
148 *addr
= (FPW
) 0x00F000F0;
149 return (0); /* no or unknown flash */
153 case (u16
) SST_ID_xF6401B
:
154 info
->flash_id
+= FLASH_SST6401B
;
157 info
->flash_id
= FLASH_UNKNOWN
;
161 info
->sector_count
= 0;
163 info
->sector_count
= CONFIG_SYS_SST_SECT
;
164 info
->size
= CONFIG_SYS_SST_SECT
* CONFIG_SYS_SST_SECTSZ
;
167 *addr
= (FPWV
) 0x00F000F0;
169 if (info
->sector_count
> CONFIG_SYS_MAX_FLASH_SECT
) {
170 printf("** ERROR: sector count %d > max (%d) **\n",
171 info
->sector_count
, CONFIG_SYS_MAX_FLASH_SECT
);
172 info
->sector_count
= CONFIG_SYS_MAX_FLASH_SECT
;
178 int flash_erase(flash_info_t
* info
, int s_first
, int s_last
)
181 int flag
, prot
, sect
, count
;
183 int rcode
= 0, flashtype
= 0;
185 if ((s_first
< 0) || (s_first
> s_last
)) {
186 if (info
->flash_id
== FLASH_UNKNOWN
)
187 printf("- missing\n");
189 printf("- no sectors to erase\n");
193 type
= (info
->flash_id
& FLASH_VENDMASK
);
200 type
= (info
->flash_id
& FLASH_VENDMASK
);
201 printf("Can't erase unknown flash type %08lx - aborted\n",
207 for (sect
= s_first
; sect
<= s_last
; ++sect
) {
208 if (info
->protect
[sect
]) {
214 printf("- Warning: %d protected sectors will not be erased!\n",
219 flag
= disable_interrupts();
221 start
= get_timer(0);
223 if ((s_last
- s_first
) == (CONFIG_SYS_SST_SECT
- 1)) {
225 addr
= (FPWV
*) info
->start
[0];
227 addr
[FLASH_CYCLE1
] = 0x00AA; /* unlock */
228 addr
[FLASH_CYCLE2
] = 0x0055; /* unlock */
229 addr
[FLASH_CYCLE1
] = 0x0080; /* erase mode */
230 addr
[FLASH_CYCLE1
] = 0x00AA; /* unlock */
231 addr
[FLASH_CYCLE2
] = 0x0055; /* unlock */
232 *addr
= 0x0030; /* erase chip */
235 start
= get_timer(0);
237 while ((*addr
& 0x0080) != 0x0080) {
238 if (count
++ > 0x10000) {
243 if (get_timer(start
) > CONFIG_SYS_FLASH_ERASE_TOUT
) {
245 *addr
= 0x00F0; /* reset to read mode */
251 *addr
= 0x00F0; /* reset to read mode */
253 printf("\b. done\n");
259 } else if (prot
== CONFIG_SYS_SST_SECT
) {
264 /* Start erase on unprotected sectors */
265 for (sect
= s_first
; sect
<= s_last
; sect
++) {
266 if (info
->protect
[sect
] == 0) { /* not protected */
268 addr
= (FPWV
*) (info
->start
[sect
]);
272 /* arm simple, non interrupt dependent timer */
273 start
= get_timer(0);
278 FPWV
*base
; /* first address in bank */
280 flag
= disable_interrupts();
282 base
= (FPWV
*) (CONFIG_SYS_FLASH_BASE
); /* First sector */
284 base
[FLASH_CYCLE1
] = 0x00AA; /* unlock */
285 base
[FLASH_CYCLE2
] = 0x0055; /* unlock */
286 base
[FLASH_CYCLE1
] = 0x0080; /* erase mode */
287 base
[FLASH_CYCLE1
] = 0x00AA; /* unlock */
288 base
[FLASH_CYCLE2
] = 0x0055; /* unlock */
289 *addr
= 0x0050; /* erase sector */
294 while ((*addr
& 0x0080) != 0x0080) {
295 if (get_timer(start
) >
296 CONFIG_SYS_FLASH_ERASE_TOUT
) {
298 *addr
= 0x00F0; /* reset to read mode */
305 *addr
= 0x00F0; /* reset to read mode */
308 } /* switch (flashtype) */
319 int write_buff(flash_info_t
* info
, uchar
* src
, ulong addr
, ulong cnt
)
325 if (info
->flash_id
== FLASH_UNKNOWN
)
328 /* get lower word aligned address */
331 /* handle unaligned start bytes */
333 data
= *((FPWV
*) wp
);
334 data
= (data
<< 8) | *src
;
336 if ((rc
= write_word(info
, (FPWV
*) wp
, data
)) != 0)
346 * handle word aligned part
349 data
= *((FPWV
*) src
);
351 if ((rc
= write_word(info
, (FPWV
*) wp
, data
)) != 0)
358 if (count
++ > 0x800) {
363 /* handle word aligned part */
365 /* handle word aligned part */
367 data
= *((FPWV
*) wp
);
369 data
= (data
& 0x00FF) | (*src
<< 8);
371 if ((rc
= write_word(info
, (FPWV
*) wp
, data
)) != 0)
377 if (count
++ > 0x800) {
389 /*-----------------------------------------------------------------------
390 * Write a word to Flash
391 * A word is 16 bits, whichever the bus width of the flash bank
392 * (not an individual chip) is.
397 * 2 - Flash not erased
399 int write_word(flash_info_t
* info
, FPWV
* dest
, u16 data
)
403 int res
= 0; /* result, assume success */
404 FPWV
*base
; /* first address in flash bank */
406 /* Check if Flash is (sufficiently) erased */
407 if ((*dest
& (u8
) data
) != (u8
) data
) {
411 base
= (FPWV
*) (CONFIG_SYS_FLASH_BASE
);
413 /* Disable interrupts which might cause a timeout here */
414 flag
= disable_interrupts();
416 base
[FLASH_CYCLE1
] = (u8
) 0x00AA00AA; /* unlock */
417 base
[FLASH_CYCLE2
] = (u8
) 0x00550055; /* unlock */
418 base
[FLASH_CYCLE1
] = (u8
) 0x00A000A0; /* selects program mode */
420 *dest
= data
; /* start programming the data */
422 /* re-enable interrupts if necessary */
426 start
= get_timer(0);
428 /* data polling for D7 */
430 && (*dest
& (u8
) 0x00800080) != (data
& (u8
) 0x00800080)) {
431 if (get_timer(start
) > CONFIG_SYS_FLASH_WRITE_TOUT
) {
432 *dest
= (u8
) 0x00F000F0; /* reset bank */
437 *dest
++ = (u8
) 0x00F000F0; /* reset bank */
442 static inline void spin_wheel(void)
445 static char w
[] = "\\/-";
447 printf("\010%c", w
[p
]);
448 (++p
== 3) ? (p
= 0) : 0;