3 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
6 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
7 * Marius Groeger <mgroeger@sysgo.de>
10 * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
12 * (C) Copyright 2003 (2 x 16 bit Flash bank patches)
13 * Rolf Peukert, IMMS gGmbH, <rolf.peukert@imms.de>
15 * See file CREDITS for list of people who contributed to this
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License as
20 * published by the Free Software Foundation; either version 2 of
21 * the License, or (at your option) any later version.
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
35 #include <asm/arch/pxa-regs.h>
37 #define FLASH_BANK_SIZE 0x02000000
38 #define MAIN_SECT_SIZE 0x40000 /* 2x16 = 256k per sector */
40 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
44 * flash_init: - initialize data structures for flash chips
46 * @return: size of the flash
49 ulong flash_init(void)
54 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
56 flash_info[i].flash_id =
57 (INTEL_MANUFACT & FLASH_VENDMASK) |
58 (INTEL_ID_28F128J3 & FLASH_TYPEMASK);
59 flash_info[i].size = FLASH_BANK_SIZE;
60 flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
61 memset(flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
65 flashbase = PHYS_FLASH_1;
68 panic("configured too many flash banks!\n");
71 for (j = 0; j < flash_info[i].sector_count; j++) {
72 flash_info[i].start[j] = flashbase + j*MAIN_SECT_SIZE;
74 size += flash_info[i].size;
77 /* Protect monitor and environment sectors */
78 flash_protect(FLAG_PROTECT_SET,
79 CONFIG_SYS_FLASH_BASE,
80 CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
83 flash_protect(FLAG_PROTECT_SET,
85 CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
93 * flash_print_info: - print information about the flash situation
96 void flash_print_info (flash_info_t *info)
100 for (j=0; j<CONFIG_SYS_MAX_FLASH_BANKS; j++) {
102 switch (info->flash_id & FLASH_VENDMASK) {
103 case (INTEL_MANUFACT & FLASH_VENDMASK):
107 printf ("Unknown Vendor ");
111 switch (info->flash_id & FLASH_TYPEMASK) {
112 case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
113 printf("28F128J3 (128Mbit)\n");
116 printf("Unknown Chip Type\n");
120 printf(" Size: %ld MB in %d Sectors\n",
121 info->size >> 20, info->sector_count);
123 printf(" Sector Start Addresses:");
124 for (i = 0; i < info->sector_count; i++) {
125 if ((i % 5) == 0) printf ("\n ");
127 printf (" %08lX%s", info->start[i],
128 info->protect[i] ? " (RO)" : " ");
137 * flash_erase: - erase flash sectors
140 int flash_erase(flash_info_t *info, int s_first, int s_last)
142 int flag, prot, sect;
146 if (info->flash_id == FLASH_UNKNOWN)
147 return ERR_UNKNOWN_FLASH_TYPE;
149 if ((s_first < 0) || (s_first > s_last)) {
153 if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK))
154 return ERR_UNKNOWN_FLASH_VENDOR;
157 for (sect=s_first; sect<=s_last; ++sect) {
158 if (info->protect[sect]) prot++;
161 if (prot) return ERR_PROTECTED;
164 * Disable interrupts which might cause a timeout
165 * here. Remember that our exception vectors are
166 * at address 0 in the flash, and we don't want a
167 * (ticker) exception to happen while the flash
168 * chip is in programming mode.
171 flag = disable_interrupts();
173 /* Start erase on unprotected sectors */
174 for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {
176 printf("Erasing sector %2d ... ", sect);
178 /* arm simple, non interrupt dependent timer */
179 start = get_timer(0);
181 if (info->protect[sect] == 0) { /* not protected */
182 u32 * volatile addr = (u32 * volatile)(info->start[sect]);
185 /* The strata flashs are aligned side by side on */
186 /* the data bus, so we have to write the commands */
187 /* to both chips here: */
189 *addr = 0x00200020; /* erase setup */
190 *addr = 0x00D000D0; /* erase confirm */
192 while ((*addr & 0x00800080) != 0x00800080) {
193 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
194 *addr = 0x00B000B0; /* suspend erase*/
195 *addr = 0x00FF00FF; /* read mode */
200 *addr = 0x00500050; /* clear status register cmd. */
201 *addr = 0x00FF00FF; /* reset to read mode */
205 if (ctrlc()) printf("User Interrupt!\n");
208 /* allow flash to settle - wait 10 ms */
209 udelay_masked(10000);
211 if (flag) enable_interrupts();
217 * write_long: - copy memory to flash, assume a bank of 2 devices with 16bit each
220 static int write_long (flash_info_t *info, ulong dest, ulong data)
222 u32 * volatile addr = (u32 * volatile)dest, val;
227 /* read array command - just for the case... */
230 /* Check if Flash is (sufficiently) erased */
231 if ((*addr & data) != data) return ERR_NOT_ERASED;
234 * Disable interrupts which might cause a timeout
235 * here. Remember that our exception vectors are
236 * at address 0 in the flash, and we don't want a
237 * (ticker) exception to happen while the flash
238 * chip is in programming mode.
240 flag = disable_interrupts();
242 /* clear status register command */
245 /* program set-up command */
248 /* latch address/data */
251 /* arm simple, non interrupt dependent timer */
252 start = get_timer(0);
254 /* wait while polling the status register */
255 while(((val = *addr) & 0x00800080) != 0x00800080) {
256 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
258 /* suspend program command */
264 /* check for errors */
265 if(val & 0x001A001A) {
266 printf("\nFlash write error %02x at address %08lx\n",
267 (int)val, (unsigned long)dest);
268 if(val & 0x00080008) {
269 printf("Voltage range error.\n");
273 if(val & 0x00020002) {
274 printf("Device protect error.\n");
278 if(val & 0x00100010) {
279 printf("Programming error.\n");
288 /* read array command */
290 if (flag) enable_interrupts();
297 * write_buf: - Copy memory to flash.
300 * @param src: source of copy transaction
301 * @param addr: where to copy to
302 * @param cnt: number of bytes to copy
307 /* "long" version, uses 32bit words */
308 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
315 wp = (addr & ~3); /* get lower word aligned address */
318 * handle unaligned start bytes
320 if ((l = addr - wp) != 0) {
322 for (i=0, cp=wp; i<l; ++i, ++cp) {
323 data = (data >> 8) | (*(uchar *)cp << 24);
325 for (; i<4 && cnt>0; ++i) {
326 data = (data >> 8) | (*src++ << 24);
330 for (; cnt==0 && i<4; ++i, ++cp) {
331 data = (data >> 8) | (*(uchar *)cp << 24);
334 if ((rc = write_long(info, wp, data)) != 0) {
341 * handle word aligned part
344 data = *((ulong*)src);
345 if ((rc = write_long(info, wp, data)) != 0) {
353 if (cnt == 0) return ERR_OK;
356 * handle unaligned tail bytes
359 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
360 data = (data >> 8) | (*src++ << 24);
363 for (; i<4; ++i, ++cp) {
364 data = (data >> 8) | (*(uchar *)cp << 24);
367 return write_long(info, wp, data);