3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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
110 * Inferno is complicated, it's hardware locked
112 #ifdef CONFIG_INFERNO
113 /* first one, 0x00000 to 0x07fff */
114 flash_protect(FLAG_PROTECT_SET,
115 CFG_FLASH_BASE + 0x00000,
116 CFG_FLASH_BASE + 0x08000 - 1,
119 /* third to 10th, 0x0c000 - 0xdffff */
120 flash_protect(FLAG_PROTECT_SET,
121 CFG_FLASH_BASE + 0x0c000,
122 CFG_FLASH_BASE + 0xe0000 - 1,
125 flash_protect(FLAG_PROTECT_SET,
127 CFG_FLASH_BASE + _armboot_end_data - _armboot_start,
130 flash_protect(FLAG_PROTECT_SET,
132 CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
138 /*-----------------------------------------------------------------------
140 void flash_print_info (flash_info_t *info)
144 switch (info->flash_id & FLASH_VENDMASK)
146 case (AMD_MANUFACT & FLASH_VENDMASK):
150 printf("Unknown Vendor ");
154 switch (info->flash_id & FLASH_TYPEMASK)
156 case (AMD_ID_LV160B & FLASH_TYPEMASK):
157 printf("2x Amd29F160BB (16Mbit)\n");
160 printf("Unknown Chip Type\n");
165 printf(" Size: %ld MB in %d Sectors\n",
166 info->size >> 20, info->sector_count);
168 printf(" Sector Start Addresses:");
169 for (i = 0; i < info->sector_count; i++)
175 printf (" %08lX%s", info->start[i],
176 info->protect[i] ? " (RO)" : " ");
183 /*-----------------------------------------------------------------------
186 int flash_erase (flash_info_t *info, int s_first, int s_last)
189 int iflag, cflag, prot, sect;
193 /* first look for protection bits */
195 if (info->flash_id == FLASH_UNKNOWN)
196 return ERR_UNKNOWN_FLASH_TYPE;
198 if ((s_first < 0) || (s_first > s_last)) {
202 if ((info->flash_id & FLASH_VENDMASK) !=
203 (AMD_MANUFACT & FLASH_VENDMASK)) {
204 return ERR_UNKNOWN_FLASH_VENDOR;
208 for (sect=s_first; sect<=s_last; ++sect) {
209 if (info->protect[sect]) {
214 return ERR_PROTECTED;
217 * Disable interrupts which might cause a timeout
218 * here. Remember that our exception vectors are
219 * at address 0 in the flash, and we don't want a
220 * (ticker) exception to happen while the flash
221 * chip is in programming mode.
223 cflag = icache_status();
225 iflag = disable_interrupts();
227 /* Start erase on unprotected sectors */
228 for (sect = s_first; sect<=s_last && !ctrlc(); sect++)
230 printf("Erasing sector %2d ... ", sect);
232 /* arm simple, non interrupt dependent timer */
233 reset_timer_masked();
235 if (info->protect[sect] == 0)
236 { /* not protected */
237 vu_long *addr = (vu_long *)(info->start[sect]);
239 MEM_FLASH_ADDR1 = CMD_UNLOCK1;
240 MEM_FLASH_ADDR2 = CMD_UNLOCK2;
241 MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
243 MEM_FLASH_ADDR1 = CMD_UNLOCK1;
244 MEM_FLASH_ADDR2 = CMD_UNLOCK2;
245 *addr = CMD_ERASE_CONFIRM;
247 /* wait until flash is ready */
255 if (get_timer_masked() > CFG_FLASH_ERASE_TOUT)
257 MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
262 if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE)
265 if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR)
268 if (!chip2 && (result >> 16) & BIT_ERASE_DONE)
271 if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR)
274 } while (!chip1 || !chip2);
276 MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
278 if (chip1 == ERR || chip2 == ERR)
291 else /* it was protected */
293 printf("protected!\n");
298 printf("User Interrupt!\n");
301 /* allow flash to settle - wait 10 ms */
302 udelay_masked(10000);
313 /*-----------------------------------------------------------------------
314 * Copy memory to flash
317 volatile static int write_word (flash_info_t *info, ulong dest, ulong data)
319 vu_long *addr = (vu_long *)dest;
326 * Check if Flash is (sufficiently) erased
329 if ((result & data) != data)
330 return ERR_NOT_ERASED;
334 * Disable interrupts which might cause a timeout
335 * here. Remember that our exception vectors are
336 * at address 0 in the flash, and we don't want a
337 * (ticker) exception to happen while the flash
338 * chip is in programming mode.
340 cflag = icache_status();
342 iflag = disable_interrupts();
344 MEM_FLASH_ADDR1 = CMD_UNLOCK1;
345 MEM_FLASH_ADDR2 = CMD_UNLOCK2;
346 MEM_FLASH_ADDR1 = CMD_UNLOCK_BYPASS;
350 /* arm simple, non interrupt dependent timer */
351 reset_timer_masked();
353 /* wait until flash is ready */
360 if (get_timer_masked() > CFG_FLASH_ERASE_TOUT)
365 if (!chip1 && ((result & 0x80) == (data & 0x80)))
368 if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR))
372 if ((result & 0x80) == (data & 0x80))
378 if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16))))
381 if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR))
385 if ((result & (0x80 << 16)) == (data & (0x80 << 16)))
391 } while (!chip1 || !chip2);
393 *addr = CMD_READ_ARRAY;
395 if (chip1 == ERR || chip2 == ERR || *addr != data)
407 /*-----------------------------------------------------------------------
408 * Copy memory to flash.
411 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
417 wp = (addr & ~3); /* get lower word aligned address */
420 * handle unaligned start bytes
422 if ((l = addr - wp) != 0) {
424 for (i=0, cp=wp; i<l; ++i, ++cp) {
425 data = (data >> 8) | (*(uchar *)cp << 24);
427 for (; i<4 && cnt>0; ++i) {
428 data = (data >> 8) | (*src++ << 24);
432 for (; cnt==0 && i<4; ++i, ++cp) {
433 data = (data >> 8) | (*(uchar *)cp << 24);
436 if ((rc = write_word(info, wp, data)) != 0) {
443 * handle word aligned part
446 data = *((vu_long*)src);
447 if ((rc = write_word(info, wp, data)) != 0) {
460 * handle unaligned tail bytes
463 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
464 data = (data >> 8) | (*src++ << 24);
467 for (; i<4; ++i, ++cp) {
468 data = (data >> 8) | (*(uchar *)cp << 24);
471 return write_word(info, wp, data);