3 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
5 * (C) Copyright 2001-2004
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 #define FLASH_PORT_WIDTH32
35 #undef 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 /* Intel-compatible flash ID */
48 #define INTEL_COMPAT 0x00890089
49 #define INTEL_ALT 0x00B000B0
51 /* Intel-compatible flash commands */
52 #define INTEL_PROGRAM 0x00100010
53 #define INTEL_ERASE 0x00200020
54 #define INTEL_CLEAR 0x00500050
55 #define INTEL_LOCKBIT 0x00600060
56 #define INTEL_PROTECT 0x00010001
57 #define INTEL_STATUS 0x00700070
58 #define INTEL_READID 0x00900090
59 #define INTEL_CONFIRM 0x00D000D0
60 #define INTEL_RESET 0xFFFFFFFF
62 /* Intel-compatible flash status bits */
63 #define INTEL_FINISHED 0x00800080
64 #define INTEL_OK 0x00800080
66 #define FPW FLASH_PORT_WIDTH
67 #define FPWV FLASH_PORT_WIDTHV
69 #define mb() __asm__ __volatile__ ("" : : : "memory")
71 /*-----------------------------------------------------------------------
74 static ulong
flash_get_size (FPW
*addr
, flash_info_t
*info
);
75 static int write_data (flash_info_t
*info
, ulong dest
, FPW data
);
76 static void flash_get_offsets (ulong base
, flash_info_t
*info
);
77 void inline spin_wheel (void);
79 /*-----------------------------------------------------------------------
82 unsigned long flash_init (void)
87 for (i
= 0; i
< CONFIG_SYS_MAX_FLASH_BANKS
; i
++) {
90 flash_get_size ((FPW
*) PHYS_FLASH_1
, &flash_info
[i
]);
91 flash_get_offsets (PHYS_FLASH_1
, &flash_info
[i
]);
94 flash_get_size ((FPW
*) PHYS_FLASH_2
, &flash_info
[i
]);
95 flash_get_offsets (PHYS_FLASH_2
, &flash_info
[i
]);
98 panic ("configured to many flash banks!\n");
101 size
+= flash_info
[i
].size
;
104 /* Protect monitor and environment sectors
106 flash_protect ( FLAG_PROTECT_SET
,
107 CONFIG_SYS_FLASH_BASE
,
108 CONFIG_SYS_FLASH_BASE
+ monitor_flash_len
- 1,
111 flash_protect ( FLAG_PROTECT_SET
,
113 CONFIG_ENV_ADDR
+ CONFIG_ENV_SIZE
- 1, &flash_info
[0] );
118 /*-----------------------------------------------------------------------
120 static void flash_get_offsets (ulong base
, flash_info_t
*info
)
124 if (info
->flash_id
== FLASH_UNKNOWN
) {
128 if ((info
->flash_id
& FLASH_VENDMASK
) == FLASH_MAN_INTEL
) {
129 for (i
= 0; i
< info
->sector_count
; i
++) {
130 info
->start
[i
] = base
+ (i
* PHYS_FLASH_SECT_SIZE
);
131 info
->protect
[i
] = 0;
136 /*-----------------------------------------------------------------------
138 void flash_print_info (flash_info_t
*info
)
142 if (info
->flash_id
== FLASH_UNKNOWN
) {
143 printf ("missing or unknown FLASH type\n");
147 switch (info
->flash_id
& FLASH_VENDMASK
) {
148 case FLASH_MAN_INTEL
:
152 printf ("Unknown Vendor ");
156 switch (info
->flash_id
& FLASH_TYPEMASK
) {
157 case FLASH_28F128J3A
:
158 printf ("28F128J3A\n");
161 case FLASH_28F640J3A
:
162 printf ("28F640J3A\n");
165 printf ("Unknown Chip Type\n");
169 printf (" Size: %ld MB in %d Sectors\n",
170 info
->size
>> 20, info
->sector_count
);
172 printf (" Sector Start Addresses:");
173 for (i
= 0; i
< info
->sector_count
; ++i
) {
178 info
->protect
[i
] ? " (RO)" : " ");
185 * The following code cannot be run from FLASH!
187 static ulong
flash_get_size (FPW
*addr
, flash_info_t
*info
)
191 /* Write auto select command: read Manufacturer ID */
192 addr
[0x5555] = (FPW
) 0x00AA00AA;
193 addr
[0x2AAA] = (FPW
) 0x00550055;
194 addr
[0x5555] = (FPW
) 0x00900090;
201 case (FPW
) INTEL_MANUFACT
:
202 info
->flash_id
= FLASH_MAN_INTEL
;
206 info
->flash_id
= FLASH_UNKNOWN
;
207 info
->sector_count
= 0;
209 addr
[0] = (FPW
) 0x00FF00FF; /* restore read mode */
210 return (0); /* no or unknown flash */
214 value
= addr
[1]; /* device ID */
218 case (FPW
) INTEL_ID_28F128J3A
:
219 info
->flash_id
+= FLASH_28F128J3A
;
220 info
->sector_count
= 128;
221 info
->size
= 0x02000000;
222 break; /* => 32 MB */
224 case (FPW
) INTEL_ID_28F640J3A
:
225 info
->flash_id
+= FLASH_28F640J3A
;
226 info
->sector_count
= 64;
227 info
->size
= 0x01000000;
228 break; /* => 16 MB */
231 info
->flash_id
= FLASH_UNKNOWN
;
235 if (info
->sector_count
> CONFIG_SYS_MAX_FLASH_SECT
) {
236 printf ("** ERROR: sector count %d > max (%d) **\n",
237 info
->sector_count
, CONFIG_SYS_MAX_FLASH_SECT
);
238 info
->sector_count
= CONFIG_SYS_MAX_FLASH_SECT
;
241 addr
[0] = (FPW
) 0x00FF00FF; /* restore read mode */
247 /*-----------------------------------------------------------------------
250 int flash_erase (flash_info_t
*info
, int s_first
, int s_last
)
252 int flag
, prot
, sect
;
253 ulong type
, start
, last
;
256 if ((s_first
< 0) || (s_first
> s_last
)) {
257 if (info
->flash_id
== FLASH_UNKNOWN
) {
258 printf ("- missing\n");
260 printf ("- no sectors to erase\n");
265 type
= (info
->flash_id
& FLASH_VENDMASK
);
266 if ((type
!= FLASH_MAN_INTEL
)) {
267 printf ("Can't erase unknown flash type %08lx - aborted\n",
273 for (sect
= s_first
; sect
<= s_last
; ++sect
) {
274 if (info
->protect
[sect
]) {
280 printf ("- Warning: %d protected sectors will not be erased!\n",
286 start
= get_timer (0);
289 /* Disable interrupts which might cause a timeout here */
290 flag
= disable_interrupts ();
292 /* Start erase on unprotected sectors */
293 for (sect
= s_first
; sect
<= s_last
; sect
++) {
294 if (info
->protect
[sect
] == 0) { /* not protected */
295 FPWV
*addr
= (FPWV
*) (info
->start
[sect
]);
298 printf ("Erasing sector %2d ... ", sect
);
300 /* arm simple, non interrupt dependent timer */
301 reset_timer_masked ();
303 *addr
= (FPW
) 0x00500050; /* clear status register */
304 *addr
= (FPW
) 0x00200020; /* erase setup */
305 *addr
= (FPW
) 0x00D000D0; /* erase confirm */
307 while (((status
= *addr
) & (FPW
) 0x00800080) != (FPW
) 0x00800080) {
308 if (get_timer_masked () > CONFIG_SYS_FLASH_ERASE_TOUT
) {
309 printf ("Timeout\n");
310 *addr
= (FPW
) 0x00B000B0; /* suspend erase */
311 *addr
= (FPW
) 0x00FF00FF; /* reset to read mode */
317 *addr
= 0x00500050; /* clear status register cmd. */
318 *addr
= 0x00FF00FF; /* resest to read mode */
326 /*-----------------------------------------------------------------------
327 * Copy memory to flash, returns:
330 * 2 - Flash not erased
331 * 4 - Flash not identified
334 int write_buff (flash_info_t
*info
, uchar
*src
, ulong addr
, ulong cnt
)
338 int count
, i
, l
, rc
, port_width
;
340 if (info
->flash_id
== FLASH_UNKNOWN
) {
343 /* get lower word aligned address */
344 #ifdef FLASH_PORT_WIDTH16
353 * handle unaligned start bytes
355 if ((l
= addr
- wp
) != 0) {
357 for (i
= 0, cp
= wp
; i
< l
; ++i
, ++cp
) {
358 data
= (data
<< 8) | (*(uchar
*) cp
);
360 for (; i
< port_width
&& cnt
> 0; ++i
) {
361 data
= (data
<< 8) | *src
++;
365 for (; cnt
== 0 && i
< port_width
; ++i
, ++cp
) {
366 data
= (data
<< 8) | (*(uchar
*) cp
);
369 if ((rc
= write_data (info
, wp
, SWAP (data
))) != 0) {
376 * handle word aligned part
379 while (cnt
>= port_width
) {
381 for (i
= 0; i
< port_width
; ++i
) {
382 data
= (data
<< 8) | *src
++;
384 if ((rc
= write_data (info
, wp
, SWAP (data
))) != 0) {
389 if (count
++ > 0x800) {
400 * handle unaligned tail bytes
403 for (i
= 0, cp
= wp
; i
< port_width
&& cnt
> 0; ++i
, ++cp
) {
404 data
= (data
<< 8) | *src
++;
407 for (; i
< port_width
; ++i
, ++cp
) {
408 data
= (data
<< 8) | (*(uchar
*) cp
);
411 return (write_data (info
, wp
, SWAP (data
)));
414 /*-----------------------------------------------------------------------
415 * Write a word or halfword to Flash, returns:
418 * 2 - Flash not erased
420 static int write_data (flash_info_t
*info
, ulong dest
, FPW data
)
422 FPWV
*addr
= (FPWV
*) dest
;
426 /* Check if Flash is (sufficiently) erased */
427 if ((*addr
& data
) != data
) {
428 printf ("not erased at %08lx (%lx)\n", (ulong
) addr
, *addr
);
431 /* Disable interrupts which might cause a timeout here */
432 flag
= disable_interrupts ();
434 *addr
= (FPW
) 0x00400040; /* write setup */
437 /* arm simple, non interrupt dependent timer */
438 reset_timer_masked ();
440 /* wait while polling the status register */
441 while (((status
= *addr
) & (FPW
) 0x00800080) != (FPW
) 0x00800080) {
442 if (get_timer_masked () > CONFIG_SYS_FLASH_WRITE_TOUT
) {
443 *addr
= (FPW
) 0x00FF00FF; /* restore read mode */
448 *addr
= (FPW
) 0x00FF00FF; /* restore read mode */
453 void inline spin_wheel (void)
456 static char w
[] = "\\/-";
458 printf ("\010%c", w
[p
]);
459 (++p
== 3) ? (p
= 0) : 0;
462 /*-----------------------------------------------------------------------
463 * Set/Clear sector's lock bit, returns:
465 * 1 - Error (timeout, voltage problems, etc.)
467 int flash_real_protect(flash_info_t
*info
, long sector
, int prot
)
471 vu_long
*addr
= (vu_long
*)(info
->start
[sector
]);
472 int flag
= disable_interrupts();
474 *addr
= INTEL_CLEAR
; /* Clear status register */
475 if (prot
) { /* Set sector lock bit */
476 *addr
= INTEL_LOCKBIT
; /* Sector lock bit */
477 *addr
= INTEL_PROTECT
; /* set */
479 else { /* Clear sector lock bit */
480 *addr
= INTEL_LOCKBIT
; /* All sectors lock bits */
481 *addr
= INTEL_CONFIRM
; /* clear */
484 reset_timer_masked ();
486 while ((*addr
& INTEL_FINISHED
) != INTEL_FINISHED
) {
487 if (get_timer_masked () > CONFIG_SYS_FLASH_UNLOCK_TOUT
) {
488 printf("Flash lock bit operation timed out\n");
494 if (*addr
!= INTEL_OK
) {
495 printf("Flash lock bit operation failed at %08X, CSR=%08X\n",
496 (uint
)addr
, (uint
)*addr
);
501 info
->protect
[sector
] = prot
;
504 * Clear lock bit command clears all sectors lock bits, so
505 * we have to restore lock bits of protected sectors.
509 for (i
= 0; i
< info
->sector_count
; i
++)
511 if (info
->protect
[i
])
513 reset_timer_masked ();
514 addr
= (vu_long
*)(info
->start
[i
]);
515 *addr
= INTEL_LOCKBIT
; /* Sector lock bit */
516 *addr
= INTEL_PROTECT
; /* set */
517 while ((*addr
& INTEL_FINISHED
) != INTEL_FINISHED
)
519 if (get_timer_masked () > CONFIG_SYS_FLASH_UNLOCK_TOUT
)
521 printf("Flash lock bit operation timed out\n");
533 *addr
= INTEL_RESET
; /* Reset to read array mode */