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git.ipfire.org Git - people/ms/u-boot.git/blob - board/ixdp425/flash.c
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
[CFG_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
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
< CFG_MAX_FLASH_BANKS
; i
++) {
71 flash_get_size ((FPW
*) PHYS_FLASH_1
, &flash_info
[i
]);
72 flash_get_offsets (PHYS_FLASH_1
, &flash_info
[i
]);
75 panic ("configured too many flash banks!\n");
78 size
+= flash_info
[i
].size
;
81 /* Protect monitor and environment sectors
83 flash_protect (FLAG_PROTECT_SET
,
85 CFG_FLASH_BASE
+ _bss_start
- _armboot_start
,
88 flash_protect (FLAG_PROTECT_SET
,
90 CFG_ENV_ADDR
+ CFG_ENV_SIZE
- 1, &flash_info
[0]);
95 /*-----------------------------------------------------------------------
97 static void flash_get_offsets (ulong base
, flash_info_t
* info
)
101 if (info
->flash_id
== FLASH_UNKNOWN
) {
105 if ((info
->flash_id
& FLASH_VENDMASK
) == FLASH_MAN_INTEL
) {
106 for (i
= 0; i
< info
->sector_count
; i
++) {
107 info
->start
[i
] = base
+ (i
* PHYS_FLASH_SECT_SIZE
);
108 info
->protect
[i
] = 0;
113 /*-----------------------------------------------------------------------
115 void flash_print_info (flash_info_t
* info
)
119 if (info
->flash_id
== FLASH_UNKNOWN
) {
120 printf ("missing or unknown FLASH type\n");
124 switch (info
->flash_id
& FLASH_VENDMASK
) {
125 case FLASH_MAN_INTEL
:
129 printf ("Unknown Vendor ");
133 switch (info
->flash_id
& FLASH_TYPEMASK
) {
134 case FLASH_28F128J3A
:
135 printf ("28F128J3A\n");
138 printf ("Unknown Chip Type\n");
142 printf (" Size: %ld MB in %d Sectors\n",
143 info
->size
>> 20, info
->sector_count
);
145 printf (" Sector Start Addresses:");
146 for (i
= 0; i
< info
->sector_count
; ++i
) {
150 info
->start
[i
], info
->protect
[i
] ? " (RO)" : " ");
157 * The following code cannot be run from FLASH!
159 static ulong
flash_get_size (FPW
* addr
, flash_info_t
* info
)
163 /* Write auto select command: read Manufacturer ID */
164 addr
[0x5555] = (FPW
) 0x00AA00AA;
165 addr
[0x2AAA] = (FPW
) 0x00550055;
166 addr
[0x5555] = (FPW
) 0x00900090;
173 case (FPW
) INTEL_MANUFACT
:
174 info
->flash_id
= FLASH_MAN_INTEL
;
178 info
->flash_id
= FLASH_UNKNOWN
;
179 info
->sector_count
= 0;
181 addr
[0] = (FPW
) 0x00FF00FF; /* restore read mode */
182 return (0); /* no or unknown flash */
186 value
= addr
[1]; /* device ID */
190 case (FPW
) INTEL_ID_28F128J3A
:
191 info
->flash_id
+= FLASH_28F128J3A
;
192 info
->sector_count
= 128;
193 info
->size
= 0x02000000;
194 break; /* => 16 MB */
197 info
->flash_id
= FLASH_UNKNOWN
;
201 if (info
->sector_count
> CFG_MAX_FLASH_SECT
) {
202 printf ("** ERROR: sector count %d > max (%d) **\n",
203 info
->sector_count
, CFG_MAX_FLASH_SECT
);
204 info
->sector_count
= CFG_MAX_FLASH_SECT
;
207 addr
[0] = (FPW
) 0x00FF00FF; /* restore read mode */
213 /*-----------------------------------------------------------------------
216 int flash_erase (flash_info_t
* info
, int s_first
, int s_last
)
218 int flag
, prot
, sect
;
222 if ((s_first
< 0) || (s_first
> s_last
)) {
223 if (info
->flash_id
== FLASH_UNKNOWN
) {
224 printf ("- missing\n");
226 printf ("- no sectors to erase\n");
231 type
= (info
->flash_id
& FLASH_VENDMASK
);
232 if ((type
!= FLASH_MAN_INTEL
)) {
233 printf ("Can't erase unknown flash type %08lx - aborted\n",
239 for (sect
= s_first
; sect
<= s_last
; ++sect
) {
240 if (info
->protect
[sect
]) {
246 printf ("- Warning: %d protected sectors will not be erased!\n", prot
);
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 */
270 *addr
) & (FPW
) 0x00800080) !=
272 if (get_timer_masked () >
273 CFG_FLASH_ERASE_TOUT
) {
274 printf ("Timeout\n");
275 *addr
= (FPW
) 0x00B000B0; /* suspend erase */
276 *addr
= (FPW
) 0x00FF00FF; /* reset to read mode */
282 *addr
= (FPW
) 0x00500050; /* clear status register cmd. */
283 *addr
= (FPW
) 0x00FF00FF; /* resest to read mode */
291 /*-----------------------------------------------------------------------
292 * Copy memory to flash, returns:
295 * 2 - Flash not erased
296 * 4 - Flash not identified
299 int write_buff (flash_info_t
* info
, uchar
* src
, ulong addr
, ulong cnt
)
303 int count
, i
, l
, rc
, port_width
;
305 if (info
->flash_id
== FLASH_UNKNOWN
) {
309 /* get lower word aligned address */
310 #ifdef FLASH_PORT_WIDTH16
319 * handle unaligned start bytes
321 if ((l
= addr
- wp
) != 0) {
323 for (i
= 0, cp
= wp
; i
< l
; ++i
, ++cp
) {
324 data
= (data
<< 8) | (*(uchar
*) cp
);
326 for (; i
< port_width
&& cnt
> 0; ++i
) {
327 data
= (data
<< 8) | *src
++;
331 for (; cnt
== 0 && i
< port_width
; ++i
, ++cp
) {
332 data
= (data
<< 8) | (*(uchar
*) cp
);
335 if ((rc
= write_data (info
, wp
, SWAP (data
))) != 0) {
342 * handle word aligned part
345 while (cnt
>= port_width
) {
347 for (i
= 0; i
< port_width
; ++i
) {
348 data
= (data
<< 8) | *src
++;
350 if ((rc
= write_data (info
, wp
, SWAP (data
))) != 0) {
355 if (count
++ > 0x800) {
366 * handle unaligned tail bytes
369 for (i
= 0, cp
= wp
; i
< port_width
&& cnt
> 0; ++i
, ++cp
) {
370 data
= (data
<< 8) | *src
++;
373 for (; i
< port_width
; ++i
, ++cp
) {
374 data
= (data
<< 8) | (*(uchar
*) cp
);
377 return (write_data (info
, wp
, SWAP (data
)));
380 /*-----------------------------------------------------------------------
381 * Write a word or halfword to Flash, returns:
384 * 2 - Flash not erased
386 static int write_data (flash_info_t
* info
, ulong dest
, FPW data
)
388 FPWV
*addr
= (FPWV
*) dest
;
392 /* Check if Flash is (sufficiently) erased */
393 if ((*addr
& data
) != data
) {
394 printf ("not erased at %08lx (%lx)\n", (ulong
) addr
,
398 /* Disable interrupts which might cause a timeout here */
399 flag
= disable_interrupts ();
401 *addr
= (FPW
) 0x00400040; /* write setup */
404 /* arm simple, non interrupt dependent timer */
405 reset_timer_masked ();
407 /* wait while polling the status register */
408 while (((status
= *addr
) & (FPW
) 0x00800080) != (FPW
) 0x00800080) {
409 if (get_timer_masked () > CFG_FLASH_WRITE_TOUT
) {
410 *addr
= (FPW
) 0x00FF00FF; /* restore read mode */
415 *addr
= (FPW
) 0x00FF00FF; /* restore read mode */
420 void inline spin_wheel (void)
423 static char w
[] = "\\/-";
425 printf ("\010%c", w
[p
]);
426 (++p
== 3) ? (p
= 0) : 0;