3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
4 * Alex Zuepke <azu@sysgo.de>
6 * See file CREDITS for list of people who contributed to this
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 #define FLASH_BANK_SIZE 0x400000 /* 4 MB */
31 #define MAIN_SECT_SIZE 0x20000 /* 128 KB */
33 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
36 #define CMD_READ_ARRAY 0x00F000F0
37 #define CMD_UNLOCK1 0x00AA00AA
38 #define CMD_UNLOCK2 0x00550055
39 #define CMD_ERASE_SETUP 0x00800080
40 #define CMD_ERASE_CONFIRM 0x00300030
41 #define CMD_PROGRAM 0x00A000A0
42 #define CMD_UNLOCK_BYPASS 0x00200020
44 #define MEM_FLASH_ADDR1 (*(volatile u32 *)(CFG_FLASH_BASE + (0x00000555 << 2)))
45 #define MEM_FLASH_ADDR2 (*(volatile u32 *)(CFG_FLASH_BASE + (0x000002AA << 2)))
47 #define BIT_ERASE_DONE 0x00800080
48 #define BIT_RDY_MASK 0x00800080
49 #define BIT_PROGRAM_ERROR 0x00200020
50 #define BIT_TIMEOUT 0x80000000 /* our flag */
56 /*-----------------------------------------------------------------------
59 ulong flash_init(void)
64 for (i = 0; i < CFG_MAX_FLASH_BANKS; i++)
67 flash_info[i].flash_id =
68 (AMD_MANUFACT & FLASH_VENDMASK) |
69 (AMD_ID_LV160B & FLASH_TYPEMASK);
70 flash_info[i].size = FLASH_BANK_SIZE;
71 flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
72 memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
74 flashbase = PHYS_FLASH_1;
76 panic("configured to many flash banks!\n");
77 for (j = 0; j < flash_info[i].sector_count; j++)
82 /* 1st one is 32 KB */
85 flash_info[i].start[j] = flashbase + 0;
88 /* 2nd and 3rd are both 16 KB */
89 if ((j == 1) || (j == 2))
91 flash_info[i].start[j] = flashbase + 0x8000 + (j-1)*0x4000;
97 flash_info[i].start[j] = flashbase + 0x10000;
102 flash_info[i].start[j] = flashbase + (j - 3)*MAIN_SECT_SIZE;
105 size += flash_info[i].size;
109 * Protect monitor and environment sectors
111 flash_protect(FLAG_PROTECT_SET,
112 i386boot_start-CFG_FLASH_BASE,
113 i386boot_end-CFG_FLASH_BASE,
116 flash_protect(FLAG_PROTECT_SET,
118 CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
123 /*-----------------------------------------------------------------------
125 void flash_print_info (flash_info_t *info)
129 switch (info->flash_id & FLASH_VENDMASK)
131 case (AMD_MANUFACT & FLASH_VENDMASK):
135 printf("Unknown Vendor ");
139 switch (info->flash_id & FLASH_TYPEMASK)
141 case (AMD_ID_LV160B & FLASH_TYPEMASK):
142 printf("2x Amd29F160BB (16Mbit)\n");
145 printf("Unknown Chip Type\n");
150 printf(" Size: %ld MB in %d Sectors\n",
151 info->size >> 20, info->sector_count);
153 printf(" Sector Start Addresses:");
154 for (i = 0; i < info->sector_count; i++)
160 printf (" %08lX%s", info->start[i],
161 info->protect[i] ? " (RO)" : " ");
168 /*-----------------------------------------------------------------------
171 int flash_erase (flash_info_t *info, int s_first, int s_last)
174 int iflag, prot, sect;
178 /* first look for protection bits */
180 if (info->flash_id == FLASH_UNKNOWN)
181 return ERR_UNKNOWN_FLASH_TYPE;
183 if ((s_first < 0) || (s_first > s_last)) {
187 if ((info->flash_id & FLASH_VENDMASK) !=
188 (AMD_MANUFACT & FLASH_VENDMASK)) {
189 return ERR_UNKNOWN_FLASH_VENDOR;
193 for (sect=s_first; sect<=s_last; ++sect) {
194 if (info->protect[sect]) {
199 return ERR_PROTECTED;
202 * Disable interrupts which might cause a timeout
203 * here. Remember that our exception vectors are
204 * at address 0 in the flash, and we don't want a
205 * (ticker) exception to happen while the flash
206 * chip is in programming mode.
208 iflag = disable_interrupts();
210 /* Start erase on unprotected sectors */
211 for (sect = s_first; sect<=s_last && !ctrlc(); sect++)
213 printf("Erasing sector %2d ... ", sect);
215 /* arm simple, non interrupt dependent timer */
218 if (info->protect[sect] == 0)
219 { /* not protected */
220 vu_long *addr = (vu_long *)(info->start[sect]);
222 MEM_FLASH_ADDR1 = CMD_UNLOCK1;
223 MEM_FLASH_ADDR2 = CMD_UNLOCK2;
224 MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
226 MEM_FLASH_ADDR1 = CMD_UNLOCK1;
227 MEM_FLASH_ADDR2 = CMD_UNLOCK2;
228 *addr = CMD_ERASE_CONFIRM;
230 /* wait until flash is ready */
238 if (get_timer(0) > CFG_FLASH_ERASE_TOUT)
240 MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
245 if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE)
248 if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR)
251 if (!chip2 && (result >> 16) & BIT_ERASE_DONE)
254 if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR)
257 } while (!chip1 || !chip2);
259 MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
261 if (chip1 == ERR || chip2 == ERR)
274 else /* it was protected */
276 printf("protected!\n");
281 printf("User Interrupt!\n");
284 /* allow flash to settle - wait 10 ms */
294 /*-----------------------------------------------------------------------
295 * Copy memory to flash
298 volatile static int write_word (flash_info_t *info, ulong dest, ulong data)
300 vu_long *addr = (vu_long *)dest;
307 * Check if Flash is (sufficiently) erased
310 if ((result & data) != data)
311 return ERR_NOT_ERASED;
315 * Disable interrupts which might cause a timeout
316 * here. Remember that our exception vectors are
317 * at address 0 in the flash, and we don't want a
318 * (ticker) exception to happen while the flash
319 * chip is in programming mode.
321 iflag = disable_interrupts();
323 MEM_FLASH_ADDR1 = CMD_UNLOCK1;
324 MEM_FLASH_ADDR2 = CMD_UNLOCK2;
325 MEM_FLASH_ADDR1 = CMD_UNLOCK_BYPASS;
329 /* arm simple, non interrupt dependent timer */
332 /* wait until flash is ready */
339 if (get_timer(0) > CFG_FLASH_ERASE_TOUT)
344 if (!chip1 && ((result & 0x80) == (data & 0x80)))
347 if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR))
351 if ((result & 0x80) == (data & 0x80))
357 if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16))))
360 if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR))
364 if ((result & (0x80 << 16)) == (data & (0x80 << 16)))
370 } while (!chip1 || !chip2);
372 *addr = CMD_READ_ARRAY;
374 if (chip1 == ERR || chip2 == ERR || *addr != data)
384 /*-----------------------------------------------------------------------
385 * Copy memory to flash.
388 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
394 wp = (addr & ~3); /* get lower word aligned address */
397 * handle unaligned start bytes
399 if ((l = addr - wp) != 0) {
401 for (i=0, cp=wp; i<l; ++i, ++cp) {
402 data = (data >> 8) | (*(uchar *)cp << 24);
404 for (; i<4 && cnt>0; ++i) {
405 data = (data >> 8) | (*src++ << 24);
409 for (; cnt==0 && i<4; ++i, ++cp) {
410 data = (data >> 8) | (*(uchar *)cp << 24);
413 if ((rc = write_word(info, wp, data)) != 0) {
420 * handle word aligned part
423 data = *((vu_long*)src);
424 if ((rc = write_word(info, wp, data)) != 0) {
437 * handle unaligned tail bytes
440 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
441 data = (data >> 8) | (*src++ << 24);
444 for (; i<4; ++i, ++cp) {
445 data = (data >> 8) | (*(uchar *)cp << 24);
448 return write_word(info, wp, data);