3 * Daniel Engström, Omicron Ceti AB, daniel@omicron.se
6 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
7 * Alex Zuepke <azu@sysgo.de>
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
34 #define SC520_MAX_FLASH_BANKS 3
35 #define SC520_FLASH_BANK0_BASE 0x38000000 /* BOOTCS */
36 #define SC520_FLASH_BANK1_BASE 0x30000000 /* ROMCS0 */
37 #define SC520_FLASH_BANK2_BASE 0x28000000 /* ROMCS1 */
38 #define SC520_FLASH_BANKSIZE 0x8000000
40 #define AMD29LV016_SIZE 0x200000
41 #define AMD29LV016_SECTORS 32
43 flash_info_t flash_info[SC520_MAX_FLASH_BANKS];
45 #define CMD_READ_ARRAY 0x00F000F0
46 #define CMD_UNLOCK1 0x00AA00AA
47 #define CMD_UNLOCK2 0x00550055
48 #define CMD_ERASE_SETUP 0x00800080
49 #define CMD_ERASE_CONFIRM 0x00300030
50 #define CMD_PROGRAM 0x00A000A0
51 #define CMD_UNLOCK_BYPASS 0x00200020
54 #define BIT_ERASE_DONE 0x00800080
55 #define BIT_RDY_MASK 0x00800080
56 #define BIT_PROGRAM_ERROR 0x00200020
57 #define BIT_TIMEOUT 0x80000000 /* our flag */
63 /*-----------------------------------------------------------------------
66 ulong flash_init(void)
71 for (i = 0; i < SC520_MAX_FLASH_BANKS; i++) {
75 /* FixMe: this assumes that bank 0 and 2
76 * are mapped to the two 8Mb banks */
77 flash_info[i].flash_id =
78 (AMD_MANUFACT & FLASH_VENDMASK) |
79 (AMD_ID_LV016B & FLASH_TYPEMASK);
81 flash_info[i].size = AMD29LV016_SIZE*4;
82 flash_info[i].sector_count = AMD29LV016_SECTORS;
83 sectsize = (AMD29LV016_SIZE*4)/AMD29LV016_SECTORS;
85 /* FixMe: this assumes that bank1 is unmapped
86 * (or mapped to the same flash bank as BOOTCS) */
87 flash_info[i].flash_id = 0;
88 flash_info[i].size = 0;
89 flash_info[i].sector_count = 0;
92 memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
95 flashbase = SC520_FLASH_BANK0_BASE;
98 flashbase = SC520_FLASH_BANK1_BASE;
101 flashbase = SC520_FLASH_BANK0_BASE;
104 panic("configured to many flash banks!\n");
107 for (j = 0; j < flash_info[i].sector_count; j++) {
108 flash_info[i].start[j] = sectsize;
109 flash_info[i].start[j] = flashbase + j * sectsize;
111 size += flash_info[i].size;
115 * Protect monitor and environment sectors
117 flash_protect(FLAG_PROTECT_SET,
118 i386boot_start-SC520_FLASH_BANK0_BASE,
119 i386boot_end-SC520_FLASH_BANK0_BASE,
123 flash_protect(FLAG_PROTECT_SET,
125 CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
131 /*-----------------------------------------------------------------------
133 void flash_print_info(flash_info_t *info)
137 switch (info->flash_id & FLASH_VENDMASK) {
138 case (AMD_MANUFACT & FLASH_VENDMASK):
142 printf("Unknown Vendor ");
146 switch (info->flash_id & FLASH_TYPEMASK) {
147 case (AMD_ID_LV016B & FLASH_TYPEMASK):
148 printf("4x Amd29LV016B (16Mbit)\n");
151 printf("Unknown Chip Type\n");
156 printf(" Size: %ld MB in %d Sectors\n",
157 info->size >> 20, info->sector_count);
159 printf(" Sector Start Addresses:");
160 for (i = 0; i < info->sector_count; i++) {
164 printf (" %08lX%s", info->start[i],
165 info->protect[i] ? " (RO)" : " ");
172 /*-----------------------------------------------------------------------
175 int flash_erase(flash_info_t *info, int s_first, int s_last)
178 int iflag, prot, sect;
182 /* first look for protection bits */
184 if (info->flash_id == FLASH_UNKNOWN) {
185 return ERR_UNKNOWN_FLASH_TYPE;
188 if ((s_first < 0) || (s_first > s_last)) {
192 if ((info->flash_id & FLASH_VENDMASK) !=
193 (AMD_MANUFACT & FLASH_VENDMASK)) {
194 return ERR_UNKNOWN_FLASH_VENDOR;
198 for (sect=s_first; sect<=s_last; ++sect) {
199 if (info->protect[sect]) {
204 return ERR_PROTECTED;
208 * Disable interrupts which might cause a timeout
209 * here. Remember that our exception vectors are
210 * at address 0 in the flash, and we don't want a
211 * (ticker) exception to happen while the flash
212 * chip is in programming mode.
214 iflag = disable_interrupts();
216 /* Start erase on unprotected sectors */
217 for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {
218 printf("Erasing sector %2d ... ", sect);
220 /* arm simple, non interrupt dependent timer */
223 if (info->protect[sect] == 0) {
225 ulong addr = info->start[sect];
227 writel(CMD_UNLOCK1, addr + 1);
228 writel(CMD_UNLOCK2, addr + 2);
229 writel(CMD_ERASE_SETUP, addr + 1);
231 writel(CMD_UNLOCK1, addr + 1);
232 writel(CMD_UNLOCK2, addr + 2);
233 writel(CMD_ERASE_CONFIRM, addr);
236 /* wait until flash is ready */
240 result = readl(addr);
243 if (get_timer(0) > CFG_FLASH_ERASE_TOUT) {
244 writel(CMD_READ_ARRAY, addr + 1);
249 if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE) {
253 if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR) {
257 if (!chip2 && (result >> 16) & BIT_ERASE_DONE) {
261 if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR) {
265 } while (!chip1 || !chip2);
267 writel(CMD_READ_ARRAY, addr + 1);
269 if (chip1 == ERR || chip2 == ERR) {
280 } else { /* it was protected */
282 printf("protected!\n");
287 printf("User Interrupt!\n");
291 /* allow flash to settle - wait 10 ms */
301 /*-----------------------------------------------------------------------
302 * Copy memory to flash
305 volatile static int write_word(flash_info_t *info, ulong dest, ulong data)
314 * Check if Flash is (sufficiently) erased
316 result = readl(addr);
317 if ((result & data) != data) {
318 return ERR_NOT_ERASED;
322 * Disable interrupts which might cause a timeout
323 * here. Remember that our exception vectors are
324 * at address 0 in the flash, and we don't want a
325 * (ticker) exception to happen while the flash
326 * chip is in programming mode.
328 iflag = disable_interrupts();
330 writel(CMD_UNLOCK1, addr + 1);
331 writel(CMD_UNLOCK2, addr + 2);
332 writel(CMD_UNLOCK_BYPASS, addr + 1);
333 writel(addr, CMD_PROGRAM);
336 /* arm simple, non interrupt dependent timer */
339 /* wait until flash is ready */
342 result = readl(addr);
345 if (get_timer(0) > CFG_FLASH_ERASE_TOUT) {
350 if (!chip1 && ((result & 0x80) == (data & 0x80))) {
354 if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) {
355 result = readl(addr);
357 if ((result & 0x80) == (data & 0x80)) {
364 if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16)))) {
368 if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR)) {
369 result = readl(addr);
371 if ((result & (0x80 << 16)) == (data & (0x80 << 16))) {
378 } while (!chip1 || !chip2);
380 writel(CMD_READ_ARRAY, addr);
382 if (chip1 == ERR || chip2 == ERR || readl(addr) != data) {
393 /*-----------------------------------------------------------------------
394 * Copy memory to flash.
397 int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
403 wp = (addr & ~3); /* get lower word aligned address */
406 * handle unaligned start bytes
408 if ((l = addr - wp) != 0) {
410 for (i=0, cp=wp; i<l; ++i, ++cp) {
411 data = (data >> 8) | (*(uchar *)cp << 24);
413 for (; i<4 && cnt>0; ++i) {
414 data = (data >> 8) | (*src++ << 24);
418 for (; cnt==0 && i<4; ++i, ++cp) {
419 data = (data >> 8) | (*(uchar *)cp << 24);
422 if ((rc = write_word(info, wp, data)) != 0) {
429 * handle word aligned part
432 data = *((vu_long*)src);
433 if ((rc = write_word(info, wp, data)) != 0) {
446 * handle unaligned tail bytes
449 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
450 data = (data >> 8) | (*src++ << 24);
453 for (; i<4; ++i, ++cp) {
454 data = (data >> 8) | (*(uchar *)cp << 24);
457 return write_word(info, wp, data);