2 * (C) Copyright 2001, 2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * Frank Panno <fpanno@delphintech.com>, Delphin Technology AG
8 * Flash Routines for AMD device AM29DL323DB on the EP8260 board.
10 * This file is based on board/tqm8260/flash.c.
11 *--------------------------------------------------------------------
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,
34 #define V_ULONG(a) (*(volatile unsigned long *)( a ))
35 #define V_BYTE(a) (*(volatile unsigned char *)( a ))
38 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
41 /*-----------------------------------------------------------------------
43 void flash_reset(void)
45 if( flash_info[0].flash_id != FLASH_UNKNOWN ) {
46 V_ULONG( flash_info[0].start[0] ) = 0x00F000F0;
47 V_ULONG( flash_info[0].start[0] + 4 ) = 0x00F000F0;
51 /*-----------------------------------------------------------------------
53 ulong flash_get_size( ulong baseaddr, flash_info_t *info )
56 unsigned long flashtest_h, flashtest_l;
58 /* Write auto select command sequence and test FLASH answer */
59 V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00AA00AA;
60 V_ULONG(baseaddr + ((ulong)0x02AA << 3)) = 0x00550055;
61 V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00900090;
62 V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00AA00AA;
63 V_ULONG(baseaddr + 4 + ((ulong)0x02AA << 3)) = 0x00550055;
64 V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00900090;
66 flashtest_h = V_ULONG(baseaddr); /* manufacturer ID */
67 flashtest_l = V_ULONG(baseaddr + 4);
69 if ((int)flashtest_h == AMD_MANUFACT) {
70 info->flash_id = FLASH_MAN_AMD;
72 info->flash_id = FLASH_UNKNOWN;
73 info->sector_count = 0;
75 return (0); /* no or unknown flash */
78 flashtest_h = V_ULONG(baseaddr + 8); /* device ID */
79 flashtest_l = V_ULONG(baseaddr + 12);
80 if (flashtest_h != flashtest_l) {
81 info->flash_id = FLASH_UNKNOWN;
85 switch((int)flashtest_h) {
87 info->flash_id += FLASH_AMDL323B;
88 info->sector_count = 71;
89 info->size = 0x01000000; /* 4 * 4 MB = 16 MB */
91 case AMD_ID_LV640U: /* AMDLV640 and AMDLV641 have same ID */
92 info->flash_id += FLASH_AMLV640U;
93 info->sector_count = 128;
94 info->size = 0x02000000; /* 4 * 8 MB = 32 MB */
97 info->flash_id = FLASH_UNKNOWN;
98 return(0); /* no or unknown flash */
101 if(flashtest_h == AMD_ID_LV640U) {
102 /* set up sector start adress table (uniform sector type) */
103 for (i = 0; i < info->sector_count; i++)
104 info->start[i] = baseaddr + (i * 0x00040000);
106 /* set up sector start adress table (bottom sector type) */
107 for (i = 0; i < 8; i++) {
108 info->start[i] = baseaddr + (i * 0x00008000);
110 for (i = 8; i < info->sector_count; i++) {
111 info->start[i] = baseaddr + (i * 0x00040000) - 0x001C0000;
114 /* check for protected sectors */
115 for (i = 0; i < info->sector_count; i++) {
116 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
117 if ((V_ULONG( info->start[i] + 16 ) & 0x00010001) ||
118 (V_ULONG( info->start[i] + 20 ) & 0x00010001)) {
119 info->protect[i] = 1; /* D0 = 1 if protected */
121 info->protect[i] = 0;
129 /*-----------------------------------------------------------------------
131 unsigned long flash_init (void)
133 unsigned long size_b0 = 0;
136 /* Init: no FLASHes known */
137 for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
138 flash_info[i].flash_id = FLASH_UNKNOWN;
141 /* Static FLASH Bank configuration here (only one bank) */
143 size_b0 = flash_get_size(CONFIG_SYS_FLASH0_BASE, &flash_info[0]);
144 if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
145 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
146 size_b0, size_b0>>20);
150 * protect monitor and environment sectors
153 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH0_BASE
154 flash_protect(FLAG_PROTECT_SET,
155 CONFIG_SYS_MONITOR_BASE,
156 CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
160 #if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
161 # ifndef CONFIG_ENV_SIZE
162 # define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
164 flash_protect(FLAG_PROTECT_SET,
166 CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
173 /*-----------------------------------------------------------------------
175 void flash_print_info (flash_info_t *info)
179 if (info->flash_id == FLASH_UNKNOWN) {
180 printf ("missing or unknown FLASH type\n");
184 switch ((info->flash_id >> 16) & 0xff) {
185 case FLASH_MAN_AMD: printf ("AMD "); break;
186 default: printf ("Unknown Vendor "); break;
189 switch (info->flash_id & FLASH_TYPEMASK) {
190 case FLASH_AMDL323B: printf ("29DL323B (32 M, bottom sector)\n");
192 case FLASH_AMLV640U: printf ("29LV640U (64 M, uniform sector)\n");
194 default: printf ("Unknown Chip Type\n");
198 printf (" Size: %ld MB in %d Sectors\n",
199 info->size >> 20, info->sector_count);
201 printf (" Sector Start Addresses:");
202 for (i=0; i<info->sector_count; ++i) {
207 info->protect[i] ? " (RO)" : " "
214 /*-----------------------------------------------------------------------
216 int flash_erase (flash_info_t *info, int s_first, int s_last)
218 int flag, prot, sect, l_sect;
219 ulong start, now, last;
221 if ((s_first < 0) || (s_first > s_last)) {
222 if (info->flash_id == FLASH_UNKNOWN) {
223 printf ("- missing\n");
225 printf ("- no sectors to erase\n");
231 for (sect = s_first; sect <= s_last; sect++) {
232 if (info->protect[sect])
237 printf ("- Warning: %d protected sectors will not be erased!\n",
245 /* Disable interrupts which might cause a timeout here */
246 flag = disable_interrupts();
248 V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
249 V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
250 V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00800080;
251 V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
252 V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
253 V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
254 V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
255 V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00800080;
256 V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
257 V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
260 /* Start erase on unprotected sectors */
261 for (sect = s_first; sect<=s_last; sect++) {
262 if (info->protect[sect] == 0) { /* not protected */
263 V_ULONG( info->start[sect] ) = 0x00300030;
264 V_ULONG( info->start[sect] + 4 ) = 0x00300030;
269 /* re-enable interrupts if necessary */
273 /* wait at least 80us - let's wait 1 ms */
277 * We wait for the last triggered sector
282 start = get_timer (0);
284 while ((V_ULONG( info->start[l_sect] ) & 0x00800080) != 0x00800080 ||
285 (V_ULONG( info->start[l_sect] + 4 ) & 0x00800080) != 0x00800080)
287 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
288 printf ("Timeout\n");
291 /* show that we're waiting */
292 if ((now - last) > 1000) { /* every second */
299 /* reset to read mode */
306 static int write_dword (flash_info_t *, ulong, unsigned char *);
308 /*-----------------------------------------------------------------------
309 * Copy memory to flash, returns:
312 * 2 - Flash not erased
315 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
318 static unsigned char bb[8];
319 int i, l, rc, cc = cnt;
321 dp = (addr & ~7); /* get lower dword aligned address */
324 * handle unaligned start bytes
326 if ((l = addr - dp) != 0) {
327 for (i = 0; i < 8; i++)
328 bb[i] = (i < l || (i-l) >= cc) ? V_BYTE(dp+i) : *src++;
329 if ((rc = write_dword(info, dp, bb)) != 0)
338 * handle word aligned part
341 if ((rc = write_dword(info, dp, src)) != 0) {
354 * handle unaligned tail bytes
356 for (i = 0; i < 8; i++) {
357 bb[i] = (i < cc) ? *src++ : V_BYTE(dp+i);
359 return (write_dword(info, dp, bb));
362 /*-----------------------------------------------------------------------
363 * Write a dword to Flash, returns:
366 * 2 - Flash not erased
368 static int write_dword (flash_info_t *info, ulong dest, unsigned char * pdata)
374 for (ch=0, i=0; i < 4; i++)
375 ch = (ch << 8) + *pdata++; /* high word */
376 for (cl=0, i=0; i < 4; i++)
377 cl = (cl << 8) + *pdata++; /* low word */
379 /* Check if Flash is (sufficiently) erased */
380 if ((*((vu_long *)dest) & ch) != ch
381 ||(*((vu_long *)(dest + 4)) & cl) != cl)
386 /* Disable interrupts which might cause a timeout here */
387 flag = disable_interrupts();
389 V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
390 V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
391 V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00A000A0;
392 V_ULONG( dest ) = ch;
393 V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
394 V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
395 V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00A000A0;
396 V_ULONG( dest + 4 ) = cl;
398 /* re-enable interrupts if necessary */
402 /* data polling for D7 */
403 start = get_timer (0);
404 while (((V_ULONG( dest ) & 0x00800080) != (ch & 0x00800080)) ||
405 ((V_ULONG( dest + 4 ) & 0x00800080) != (cl & 0x00800080))) {
406 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {