3 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
9 * Texas Instruments, <www.ti.com>
10 * Kshitij Gupta <Kshitij@ti.com>
12 * See file CREDITS for list of people who contributed to this
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License as
17 * published by the Free Software Foundation; either version 2 of
18 * the License, or (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
32 #include <linux/byteorder/swab.h>
34 #define PHYS_FLASH_SECT_SIZE 0x00020000 /* 256 KB sectors (x2) */
35 flash_info_t flash_info
[CFG_MAX_FLASH_BANKS
]; /* info for FLASH chips */
37 /* Board support for 1 or 2 flash devices */
38 #undef FLASH_PORT_WIDTH32
39 #define FLASH_PORT_WIDTH16
41 #ifdef FLASH_PORT_WIDTH16
42 #define FLASH_PORT_WIDTH ushort
43 #define FLASH_PORT_WIDTHV vu_short
44 #define SWAP(x) __swab16(x)
46 #define FLASH_PORT_WIDTH ulong
47 #define FLASH_PORT_WIDTHV vu_long
48 #define SWAP(x) __swab32(x)
51 #define FPW FLASH_PORT_WIDTH
52 #define FPWV FLASH_PORT_WIDTHV
54 #define mb() __asm__ __volatile__ ("" : : : "memory")
57 /* Flash Organization Structure */
58 typedef struct OrgDef
{
59 unsigned int sector_number
;
60 unsigned int sector_size
;
64 /* Flash Organizations */
65 OrgDef OrgIntel_28F256L18T
[] = {
66 {4, 32 * 1024}, /* 4 * 32kBytes sectors */
67 {255, 128 * 1024}, /* 255 * 128kBytes sectors */
71 /*-----------------------------------------------------------------------
74 unsigned long flash_init (void);
75 static ulong
flash_get_size (FPW
* addr
, flash_info_t
* info
);
76 static int write_data (flash_info_t
* info
, ulong dest
, FPW data
);
77 static void flash_get_offsets (ulong base
, flash_info_t
* info
);
78 void inline spin_wheel (void);
79 void flash_print_info (flash_info_t
* info
);
80 void flash_unprotect_sectors (FPWV
* addr
);
81 int flash_erase (flash_info_t
* info
, int s_first
, int s_last
);
82 int write_buff (flash_info_t
* info
, uchar
* src
, ulong addr
, ulong cnt
);
84 /*-----------------------------------------------------------------------
87 unsigned long flash_init (void)
91 for (i
= 0; i
< CFG_MAX_FLASH_BANKS
; i
++) {
94 flash_get_size ((FPW
*) PHYS_FLASH_1
, &flash_info
[i
]);
95 flash_get_offsets (PHYS_FLASH_1
, &flash_info
[i
]);
98 panic ("configured too many flash banks!\n");
101 size
+= flash_info
[i
].size
;
104 /* Protect monitor and environment sectors
106 flash_protect (FLAG_PROTECT_SET
,
108 CFG_FLASH_BASE
+ monitor_flash_len
- 1, &flash_info
[0]);
110 flash_protect (FLAG_PROTECT_SET
,
112 CFG_ENV_ADDR
+ CFG_ENV_SIZE
- 1, &flash_info
[0]);
117 /*-----------------------------------------------------------------------
119 static void flash_get_offsets (ulong base
, flash_info_t
* info
)
124 pOrgDef
= OrgIntel_28F256L18T
;
125 if (info
->flash_id
== FLASH_UNKNOWN
) {
129 if ((info
->flash_id
& FLASH_VENDMASK
) == FLASH_MAN_INTEL
) {
130 for (i
= 0; i
< info
->sector_count
; i
++) {
132 info
->start
[i
] = base
+ (i
* 0x8000);
133 info
->protect
[i
] = 0;
135 info
->start
[i
] = base
+
136 (i
* PHYS_FLASH_SECT_SIZE
);
137 info
->protect
[i
] = 0;
143 /*-----------------------------------------------------------------------
145 void flash_print_info (flash_info_t
* info
)
149 if (info
->flash_id
== FLASH_UNKNOWN
) {
150 printf ("missing or unknown FLASH type\n");
154 switch (info
->flash_id
& FLASH_VENDMASK
) {
155 case FLASH_MAN_INTEL
:
159 printf ("Unknown Vendor ");
163 switch (info
->flash_id
& FLASH_TYPEMASK
) {
164 case FLASH_28F256L18T
:
165 printf ("FLASH 28F256L18T\n");
168 printf ("Unknown Chip Type\n");
172 printf (" Size: %ld MB in %d Sectors\n",
173 info
->size
>> 20, info
->sector_count
);
175 printf (" Sector Start Addresses:");
176 for (i
= 0; i
< info
->sector_count
; ++i
) {
180 info
->start
[i
], info
->protect
[i
] ? " (RO)" : " ");
187 * The following code cannot be run from FLASH!
189 static ulong
flash_get_size (FPW
* addr
, flash_info_t
* info
)
193 /* Write auto select command: read Manufacturer ID */
194 addr
[0x5555] = (FPW
) 0x00AA00AA;
195 addr
[0x2AAA] = (FPW
) 0x00550055;
196 addr
[0x5555] = (FPW
) 0x00900090;
203 case (FPW
) INTEL_MANUFACT
:
204 info
->flash_id
= FLASH_MAN_INTEL
;
208 info
->flash_id
= FLASH_UNKNOWN
;
209 info
->sector_count
= 0;
211 addr
[0] = (FPW
) 0x00FF00FF; /* restore read mode */
212 return (0); /* no or unknown flash */
216 value
= addr
[1]; /* device ID */
219 case (FPW
) (INTEL_ID_28F256L18T
):
220 info
->flash_id
+= FLASH_28F256L18T
;
221 info
->sector_count
= 259;
222 info
->size
= 0x02000000;
223 break; /* => 32 MB */
226 info
->flash_id
= FLASH_UNKNOWN
;
230 if (info
->sector_count
> CFG_MAX_FLASH_SECT
) {
231 printf ("** ERROR: sector count %d > max (%d) **\n",
232 info
->sector_count
, CFG_MAX_FLASH_SECT
);
233 info
->sector_count
= CFG_MAX_FLASH_SECT
;
236 addr
[0] = (FPW
) 0x00FF00FF; /* restore read mode */
242 /* unprotects a sector for write and erase
243 * on some intel parts, this unprotects the entire chip, but it
244 * wont hurt to call this additional times per sector...
246 void flash_unprotect_sectors (FPWV
* addr
)
248 #define PD_FINTEL_WSMS_READY_MASK 0x0080
250 *addr
= (FPW
) 0x00500050; /* clear status register */
252 /* this sends the clear lock bit command */
253 *addr
= (FPW
) 0x00600060;
254 *addr
= (FPW
) 0x00D000D0;
258 /*-----------------------------------------------------------------------
261 int flash_erase (flash_info_t
* info
, int s_first
, int s_last
)
263 int flag
, prot
, sect
;
264 ulong type
, start
, last
;
267 if ((s_first
< 0) || (s_first
> s_last
)) {
268 if (info
->flash_id
== FLASH_UNKNOWN
) {
269 printf ("- missing\n");
271 printf ("- no sectors to erase\n");
276 type
= (info
->flash_id
& FLASH_VENDMASK
);
277 if ((type
!= FLASH_MAN_INTEL
)) {
278 printf ("Can't erase unknown flash type %08lx - aborted\n",
284 for (sect
= s_first
; sect
<= s_last
; ++sect
) {
285 if (info
->protect
[sect
]) {
291 printf ("- Warning: %d protected sectors will not be erased!\n",
298 start
= get_timer (0);
301 /* Disable interrupts which might cause a timeout here */
302 flag
= disable_interrupts ();
304 /* Start erase on unprotected sectors */
305 for (sect
= s_first
; sect
<= s_last
; sect
++) {
306 if (info
->protect
[sect
] == 0) { /* not protected */
307 FPWV
*addr
= (FPWV
*) (info
->start
[sect
]);
310 printf ("Erasing sector %2d ... ", sect
);
312 flash_unprotect_sectors (addr
);
314 /* arm simple, non interrupt dependent timer */
315 reset_timer_masked ();
317 *addr
= (FPW
) 0x00500050;/* clear status register */
318 *addr
= (FPW
) 0x00200020;/* erase setup */
319 *addr
= (FPW
) 0x00D000D0;/* erase confirm */
322 *addr
) & (FPW
) 0x00800080) !=
324 if (get_timer_masked () >
325 CFG_FLASH_ERASE_TOUT
) {
326 printf ("Timeout\n");
328 *addr
= (FPW
) 0x00B000B0;
329 /* reset to read mode */
330 *addr
= (FPW
) 0x00FF00FF;
336 /* clear status register cmd. */
337 *addr
= (FPW
) 0x00500050;
338 *addr
= (FPW
) 0x00FF00FF;/* resest to read mode */
345 /*-----------------------------------------------------------------------
346 * Copy memory to flash, returns:
349 * 2 - Flash not erased
350 * 4 - Flash not identified
353 int write_buff (flash_info_t
* info
, uchar
* src
, ulong addr
, ulong cnt
)
357 int count
, i
, l
, rc
, port_width
;
359 if (info
->flash_id
== FLASH_UNKNOWN
) {
362 /* get lower word aligned address */
363 #ifdef FLASH_PORT_WIDTH16
372 * handle unaligned start bytes
374 if ((l
= addr
- wp
) != 0) {
376 for (i
= 0, cp
= wp
; i
< l
; ++i
, ++cp
) {
377 data
= (data
<< 8) | (*(uchar
*) cp
);
379 for (; i
< port_width
&& cnt
> 0; ++i
) {
380 data
= (data
<< 8) | *src
++;
384 for (; cnt
== 0 && i
< port_width
; ++i
, ++cp
) {
385 data
= (data
<< 8) | (*(uchar
*) cp
);
388 if ((rc
= write_data (info
, wp
, SWAP (data
))) != 0) {
395 * handle word aligned part
398 while (cnt
>= port_width
) {
400 for (i
= 0; i
< port_width
; ++i
) {
401 data
= (data
<< 8) | *src
++;
403 if ((rc
= write_data (info
, wp
, SWAP (data
))) != 0) {
408 if (count
++ > 0x800) {
419 * handle unaligned tail bytes
422 for (i
= 0, cp
= wp
; i
< port_width
&& cnt
> 0; ++i
, ++cp
) {
423 data
= (data
<< 8) | *src
++;
426 for (; i
< port_width
; ++i
, ++cp
) {
427 data
= (data
<< 8) | (*(uchar
*) cp
);
430 return (write_data (info
, wp
, SWAP (data
)));
433 /*-----------------------------------------------------------------------
434 * Write a word or halfword to Flash, returns:
437 * 2 - Flash not erased
439 static int write_data (flash_info_t
* info
, ulong dest
, FPW data
)
441 FPWV
*addr
= (FPWV
*) dest
;
445 /* Check if Flash is (sufficiently) erased */
446 if ((*addr
& data
) != data
) {
447 printf ("not erased at %08lx (%x)\n", (ulong
) addr
, *addr
);
450 flash_unprotect_sectors (addr
);
451 /* Disable interrupts which might cause a timeout here */
452 flag
= disable_interrupts ();
453 *addr
= (FPW
) 0x00400040; /* write setup */
456 /* arm simple, non interrupt dependent timer */
457 reset_timer_masked ();
459 /* wait while polling the status register */
460 while (((status
= *addr
) & (FPW
) 0x00800080) != (FPW
) 0x00800080) {
461 if (get_timer_masked () > CFG_FLASH_WRITE_TOUT
) {
462 *addr
= (FPW
) 0x00FF00FF; /* restore read mode */
466 *addr
= (FPW
) 0x00FF00FF; /* restore read mode */
470 void inline spin_wheel (void)
473 static char w
[] = "\\/-";
475 printf ("\010%c", w
[p
]);
476 (++p
== 3) ? (p
= 0) : 0;