3 * Marius Groeger <mgroeger@sysgo.de>
4 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
7 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
9 * Flash Routines for AM290[48]0B devices
11 *--------------------------------------------------------------------
12 * SPDX-License-Identifier: GPL-2.0+
19 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
21 /*-----------------------------------------------------------------------
25 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
26 static int write_word (flash_info_t *info, ulong dest, ulong data);
28 /*-----------------------------------------------------------------------
31 unsigned long flash_init (void)
33 unsigned long size, totsize;
37 /* Init: no FLASHes known */
38 for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
39 flash_info[i].flash_id = FLASH_UNKNOWN;
44 for(i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
45 size = flash_get_size((vu_long *)addr, &flash_info[i]);
46 if (flash_info[i].flash_id == FLASH_UNKNOWN)
53 for(i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
55 size = flash_get_size((vu_long *)addr, &flash_info[i]);
56 if (flash_info[i].flash_id == FLASH_UNKNOWN)
62 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
63 /* monitor protection ON by default */
64 flash_protect(FLAG_PROTECT_SET,
65 CONFIG_SYS_MONITOR_BASE,
66 CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
73 /*-----------------------------------------------------------------------
75 void flash_print_info (flash_info_t *info)
79 if (info->flash_id == FLASH_UNKNOWN) {
80 printf ("missing or unknown FLASH type\n");
84 switch (info->flash_id >> 16) {
89 printf ("Unknown Vendor ");
93 switch (info->flash_id & FLASH_TYPEMASK) {
95 printf ("AM29F040B (4 Mbit)\n");
98 printf ("AM29F080B (8 Mbit)\n");
101 printf ("AM29F016D (16 Mbit)\n");
104 printf ("Unknown Chip Type\n");
108 printf (" Size: %ld MB in %d Sectors\n",
109 info->size >> 20, info->sector_count);
111 printf (" Sector Start Addresses:");
112 for (i=0; i<info->sector_count; ++i) {
117 info->protect[i] ? " (RO)" : " "
125 * The following code cannot be run from FLASH!
128 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
132 ulong base = (ulong)addr;
134 /* Write auto select command: read Manufacturer ID */
135 addr[0x0555] = 0xAAAAAAAA;
136 addr[0x02AA] = 0x55555555;
137 addr[0x0555] = 0x90909090;
140 devid = addr[1] & 0xff;
142 /* only support AMD */
143 if (vendor != 0x01010101) {
150 if (devid == AMD_ID_F040B) {
151 info->flash_id = vendor << 16 | devid;
152 info->sector_count = 8;
153 info->size = info->sector_count * 0x10000;
155 else if (devid == AMD_ID_F080B) {
156 info->flash_id = vendor << 16 | devid;
157 info->sector_count = 16;
158 info->size = 4 * info->sector_count * 0x10000;
160 else if (devid == AMD_ID_F016D) {
161 info->flash_id = vendor << 16 | devid;
162 info->sector_count = 32;
163 info->size = 4 * info->sector_count * 0x10000;
166 printf ("## Unknown Flash Type: %08lx\n", devid);
170 /* check for protected sectors */
171 for (i = 0; i < info->sector_count; i++) {
172 /* sector base address */
173 info->start[i] = base + i * (info->size / info->sector_count);
174 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
175 /* D0 = 1 if protected */
176 addr = (volatile unsigned long *)(info->start[i]);
177 info->protect[i] = addr[2] & 1;
181 * Prevent writes to uninitialized FLASH.
183 if (info->flash_id != FLASH_UNKNOWN) {
184 addr = (vu_long *)info->start[0];
185 addr[0] = 0xF0; /* reset bank */
192 /*-----------------------------------------------------------------------
195 int flash_erase (flash_info_t *info, int s_first, int s_last)
197 vu_long *addr = (vu_long*)(info->start[0]);
198 int flag, prot, sect, l_sect;
199 ulong start, now, last;
201 if ((s_first < 0) || (s_first > s_last)) {
202 if (info->flash_id == FLASH_UNKNOWN) {
203 printf ("- missing\n");
205 printf ("- no sectors to erase\n");
211 for (sect = s_first; sect <= s_last; sect++) {
212 if (info->protect[sect]) {
218 printf ("- Warning: %d protected sectors will not be erased!\n",
226 /* Disable interrupts which might cause a timeout here */
227 flag = disable_interrupts();
229 addr[0x0555] = 0XAAAAAAAA;
230 addr[0x02AA] = 0x55555555;
231 addr[0x0555] = 0x80808080;
232 addr[0x0555] = 0XAAAAAAAA;
233 addr[0x02AA] = 0x55555555;
235 /* Start erase on unprotected sectors */
236 for (sect = s_first; sect<=s_last; sect++) {
237 if (info->protect[sect] == 0) { /* not protected */
238 addr = (vu_long*)(info->start[sect]);
239 addr[0] = 0x30303030;
244 /* re-enable interrupts if necessary */
248 /* wait at least 80us - let's wait 1 ms */
252 * We wait for the last triggered sector
257 start = get_timer (0);
259 addr = (vu_long*)(info->start[l_sect]);
260 while ((addr[0] & 0x80808080) != 0x80808080) {
261 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
262 printf ("Timeout\n");
265 /* show that we're waiting */
266 if ((now - last) > 1000) { /* every second */
273 /* reset to read mode */
274 addr = (volatile unsigned long *)info->start[0];
275 addr[0] = 0xF0F0F0F0; /* reset bank */
281 /*-----------------------------------------------------------------------
282 * Copy memory to flash, returns:
285 * 2 - Flash not erased
288 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
293 wp = (addr & ~3); /* get lower word aligned address */
296 * handle unaligned start bytes
298 if ((l = addr - wp) != 0) {
300 for (i=0, cp=wp; i<l; ++i, ++cp) {
301 data = (data << 8) | (*(uchar *)cp);
303 for (; i<4 && cnt>0; ++i) {
304 data = (data << 8) | *src++;
308 for (; cnt==0 && i<4; ++i, ++cp) {
309 data = (data << 8) | (*(uchar *)cp);
312 if ((rc = write_word(info, wp, data)) != 0) {
319 * handle word aligned part
323 for (i=0; i<4; ++i) {
324 data = (data << 8) | *src++;
326 if ((rc = write_word(info, wp, data)) != 0) {
338 * handle unaligned tail bytes
341 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
342 data = (data << 8) | *src++;
345 for (; i<4; ++i, ++cp) {
346 data = (data << 8) | (*(uchar *)cp);
349 return (write_word(info, wp, data));
352 /*-----------------------------------------------------------------------
353 * Write a word to Flash, returns:
356 * 2 - Flash not erased
358 static int write_word (flash_info_t *info, ulong dest, ulong data)
360 vu_long *addr = (vu_long*)(info->start[0]);
364 /* Check if Flash is (sufficiently) erased */
365 if ((*((vu_long *)dest) & data) != data) {
368 /* Disable interrupts which might cause a timeout here */
369 flag = disable_interrupts();
371 addr[0x0555] = 0xAAAAAAAA;
372 addr[0x02AA] = 0x55555555;
373 addr[0x0555] = 0xA0A0A0A0;
375 *((vu_long *)dest) = data;
377 /* re-enable interrupts if necessary */
381 /* data polling for D7 */
382 start = get_timer (0);
383 while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) {
384 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
391 /*-----------------------------------------------------------------------