3 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
28 #include <linux/byteorder/swab.h>
31 flash_info_t flash_info
[CONFIG_SYS_MAX_FLASH_BANKS
]; /* info for FLASH chips */
33 /* Board support for 1 or 2 flash devices */
34 #undef FLASH_PORT_WIDTH32
35 #define FLASH_PORT_WIDTH16
37 #ifdef FLASH_PORT_WIDTH16
38 #define FLASH_PORT_WIDTH ushort
39 #define FLASH_PORT_WIDTHV vu_short
40 #define SWAP(x) __swab16(x)
42 #define FLASH_PORT_WIDTH ulong
43 #define FLASH_PORT_WIDTHV vu_long
44 #define SWAP(x) __swab32(x)
47 #define FPW FLASH_PORT_WIDTH
48 #define FPWV FLASH_PORT_WIDTHV
50 #define mb() __asm__ __volatile__ ("" : : : "memory")
52 /*-----------------------------------------------------------------------
55 static ulong
flash_get_size (FPW
*addr
, flash_info_t
*info
);
56 static int write_data (flash_info_t
*info
, ulong dest
, FPW data
);
57 static void flash_get_offsets (ulong base
, flash_info_t
*info
);
58 void inline spin_wheel(void);
60 /*-----------------------------------------------------------------------
63 unsigned long flash_init (void)
68 for (i
= 0; i
< CONFIG_SYS_MAX_FLASH_BANKS
; i
++)
73 flash_get_size((FPW
*)PHYS_FLASH_1
, &flash_info
[i
]);
74 flash_get_offsets(PHYS_FLASH_1
, &flash_info
[i
]);
77 panic("configured too many flash banks!\n");
80 size
+= flash_info
[i
].size
;
83 /* Protect monitor and environment sectors
85 flash_protect(FLAG_PROTECT_SET
,
86 CONFIG_SYS_FLASH_BASE
,
87 CONFIG_SYS_FLASH_BASE
+ monitor_flash_len
- 1,
90 flash_protect(FLAG_PROTECT_SET
,
92 CONFIG_ENV_ADDR
+ CONFIG_ENV_SIZE
- 1,
98 /*-----------------------------------------------------------------------
100 static void flash_get_offsets (ulong base
, flash_info_t
*info
)
104 if (info
->flash_id
== FLASH_UNKNOWN
) {
108 if ((info
->flash_id
& FLASH_VENDMASK
) == FLASH_MAN_INTEL
) {
109 for (i
= 0; i
< info
->sector_count
; i
++) {
110 info
->start
[i
] = base
+ (i
* PHYS_FLASH_SECT_SIZE
);
111 info
->protect
[i
] = 0;
116 /*-----------------------------------------------------------------------
118 void flash_print_info (flash_info_t
*info
)
122 if (info
->flash_id
== FLASH_UNKNOWN
) {
123 printf ("missing or unknown FLASH type\n");
127 switch (info
->flash_id
& FLASH_VENDMASK
) {
128 case FLASH_MAN_INTEL
: printf ("INTEL "); break;
129 default: printf ("Unknown Vendor "); break;
132 switch (info
->flash_id
& FLASH_TYPEMASK
) {
133 case FLASH_28F128J3A
:
134 printf ("28F128J3A\n"); break;
135 default: printf ("Unknown Chip Type\n"); break;
138 printf (" Size: %ld MB in %d Sectors\n",
139 info
->size
>> 20, info
->sector_count
);
141 printf (" Sector Start Addresses:");
142 for (i
=0; i
<info
->sector_count
; ++i
) {
147 info
->protect
[i
] ? " (RO)" : " "
155 * The following code cannot be run from FLASH!
157 static ulong
flash_get_size (FPW
*addr
, flash_info_t
*info
)
160 /* Write auto select command: read Manufacturer ID */
161 addr
[0x5555] = (FPW
)0x00AA00AA;
162 addr
[0x2AAA] = (FPW
)0x00550055;
163 addr
[0x5555] = (FPW
)0x00900090;
170 case (FPW
)INTEL_MANUFACT
:
171 info
->flash_id
= FLASH_MAN_INTEL
;
175 info
->flash_id
= FLASH_UNKNOWN
;
176 info
->sector_count
= 0;
178 addr
[0] = (FPW
)0x00FF00FF; /* restore read mode */
179 return (0); /* no or unknown flash */
183 value
= addr
[1]; /* device ID */
186 case (FPW
)INTEL_ID_28F128J3A
:
187 info
->flash_id
+= FLASH_28F128J3A
;
188 info
->sector_count
= 128;
189 info
->size
= 0x02000000;
190 break; /* => 16 MB */
193 info
->flash_id
= FLASH_UNKNOWN
;
197 if (info
->sector_count
> CONFIG_SYS_MAX_FLASH_SECT
) {
198 printf ("** ERROR: sector count %d > max (%d) **\n",
199 info
->sector_count
, CONFIG_SYS_MAX_FLASH_SECT
);
200 info
->sector_count
= CONFIG_SYS_MAX_FLASH_SECT
;
203 addr
[0] = (FPW
)0x00FF00FF; /* restore read mode */
209 /*-----------------------------------------------------------------------
212 int flash_erase (flash_info_t
*info
, int s_first
, int s_last
)
214 int flag
, prot
, sect
;
215 ulong type
, start
, last
;
218 if ((s_first
< 0) || (s_first
> s_last
)) {
219 if (info
->flash_id
== FLASH_UNKNOWN
) {
220 printf ("- missing\n");
222 printf ("- no sectors to erase\n");
227 type
= (info
->flash_id
& FLASH_VENDMASK
);
228 if ((type
!= FLASH_MAN_INTEL
)) {
229 printf ("Can't erase unknown flash type %08lx - aborted\n",
235 for (sect
=s_first
; sect
<=s_last
; ++sect
) {
236 if (info
->protect
[sect
]) {
242 printf ("- Warning: %d protected sectors will not be erased!\n",
248 start
= get_timer (0);
251 /* Disable interrupts which might cause a timeout here */
252 flag
= disable_interrupts();
254 /* Start erase on unprotected sectors */
255 for (sect
= s_first
; sect
<=s_last
; sect
++) {
256 if (info
->protect
[sect
] == 0) { /* not protected */
257 FPWV
*addr
= (FPWV
*)(info
->start
[sect
]);
260 printf("Erasing sector %2d ... ", sect
);
262 /* arm simple, non interrupt dependent timer */
263 reset_timer_masked();
265 *addr
= (FPW
)0x00500050; /* clear status register */
266 *addr
= (FPW
)0x00200020; /* erase setup */
267 *addr
= (FPW
)0x00D000D0; /* erase confirm */
269 while (((status
= *addr
) & (FPW
)0x00800080) != (FPW
)0x00800080) {
270 if (get_timer_masked() > CONFIG_SYS_FLASH_ERASE_TOUT
) {
271 printf ("Timeout\n");
272 *addr
= (FPW
)0x00B000B0; /* suspend erase */
273 *addr
= (FPW
)0x00FF00FF; /* reset to read mode */
279 *addr
= (FPW
)0x00500050; /* clear status register cmd. */
280 *addr
= (FPW
)0x00FF00FF; /* resest to read mode */
288 /*-----------------------------------------------------------------------
289 * Copy memory to flash, returns:
292 * 2 - Flash not erased
293 * 4 - Flash not identified
296 int write_buff (flash_info_t
*info
, uchar
*src
, ulong addr
, ulong cnt
)
300 int count
, i
, l
, rc
, port_width
;
302 if (info
->flash_id
== FLASH_UNKNOWN
) {
305 /* get lower word aligned address */
306 #ifdef FLASH_PORT_WIDTH16
315 * handle unaligned start bytes
317 if ((l
= addr
- wp
) != 0) {
319 for (i
=0, cp
=wp
; i
<l
; ++i
, ++cp
) {
320 data
= (data
<< 8) | (*(uchar
*)cp
);
322 for (; i
<port_width
&& cnt
>0; ++i
) {
323 data
= (data
<< 8) | *src
++;
327 for (; cnt
==0 && i
<port_width
; ++i
, ++cp
) {
328 data
= (data
<< 8) | (*(uchar
*)cp
);
331 if ((rc
= write_data(info
, wp
, SWAP(data
))) != 0) {
338 * handle word aligned part
341 while (cnt
>= port_width
) {
343 for (i
=0; i
<port_width
; ++i
) {
344 data
= (data
<< 8) | *src
++;
346 if ((rc
= write_data(info
, wp
, SWAP(data
))) != 0) {
363 * handle unaligned tail bytes
366 for (i
=0, cp
=wp
; i
<port_width
&& cnt
>0; ++i
, ++cp
) {
367 data
= (data
<< 8) | *src
++;
370 for (; i
<port_width
; ++i
, ++cp
) {
371 data
= (data
<< 8) | (*(uchar
*)cp
);
374 return (write_data(info
, wp
, SWAP(data
)));
377 /*-----------------------------------------------------------------------
378 * Write a word or halfword to Flash, returns:
381 * 2 - Flash not erased
383 static int write_data (flash_info_t
*info
, ulong dest
, FPW data
)
385 FPWV
*addr
= (FPWV
*)dest
;
389 /* Check if Flash is (sufficiently) erased */
390 if ((*addr
& data
) != data
) {
391 printf("not erased at %08lx (%x)\n",(ulong
)addr
,*addr
);
394 /* Disable interrupts which might cause a timeout here */
395 flag
= disable_interrupts();
397 *addr
= (FPW
)0x00400040; /* write setup */
400 /* arm simple, non interrupt dependent timer */
401 reset_timer_masked();
403 /* wait while polling the status register */
404 while (((status
= *addr
) & (FPW
)0x00800080) != (FPW
)0x00800080) {
405 if (get_timer_masked() > CONFIG_SYS_FLASH_WRITE_TOUT
) {
406 *addr
= (FPW
)0x00FF00FF; /* restore read mode */
411 *addr
= (FPW
)0x00FF00FF; /* restore read mode */
420 static char w
[] = "\\/-";
422 printf("\010%c", w
[p
]);
423 (++p
== 3) ? (p
= 0) : 0;