3 * Greg Ungerer, OpenGear Inc, greg.ungerer@opengear.com
6 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
9 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
11 * See file CREDITS for list of people who contributed to this
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 #include <linux/byteorder/swab.h>
34 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
36 #define mb() __asm__ __volatile__ ("" : : : "memory")
38 /*-----------------------------------------------------------------------
41 static ulong flash_get_size (unsigned char * addr, flash_info_t * info);
42 static int write_data (flash_info_t * info, ulong dest, unsigned char data);
43 static void flash_get_offsets (ulong base, flash_info_t * info);
44 void inline spin_wheel (void);
46 /*-----------------------------------------------------------------------
49 unsigned long flash_init (void)
54 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
57 flash_get_size ((unsigned char *) PHYS_FLASH_1, &flash_info[i]);
58 flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
62 flash_info[i].flash_id = FLASH_UNKNOWN;
65 panic ("configured too many flash banks!\n");
68 size += flash_info[i].size;
71 /* Protect monitor and environment sectors
73 flash_protect (FLAG_PROTECT_SET,
74 CONFIG_SYS_FLASH_BASE,
75 CONFIG_SYS_FLASH_BASE + _bss_start - _armboot_start,
81 /*-----------------------------------------------------------------------
83 static void flash_get_offsets (ulong base, flash_info_t * info)
87 if (info->flash_id == FLASH_UNKNOWN)
90 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
91 for (i = 0; i < info->sector_count; i++) {
92 info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
98 /*-----------------------------------------------------------------------
100 void flash_print_info (flash_info_t * info)
104 if (info->flash_id == FLASH_UNKNOWN) {
105 printf ("missing or unknown FLASH type\n");
109 switch (info->flash_id & FLASH_VENDMASK) {
110 case FLASH_MAN_INTEL:
114 printf ("Unknown Vendor ");
118 switch (info->flash_id & FLASH_TYPEMASK) {
119 case FLASH_28F128J3A:
120 printf ("28F128J3A\n");
123 printf ("Unknown Chip Type\n");
127 printf (" Size: %ld MB in %d Sectors\n",
128 info->size >> 20, info->sector_count);
130 printf (" Sector Start Addresses:");
131 for (i = 0; i < info->sector_count; ++i) {
135 info->start[i], info->protect[i] ? " (RO)" : " ");
142 * The following code cannot be run from FLASH!
144 static ulong flash_get_size (unsigned char * addr, flash_info_t * info)
146 volatile unsigned char value;
148 /* Write auto select command: read Manufacturer ID */
158 case (unsigned char)INTEL_MANUFACT:
159 info->flash_id = FLASH_MAN_INTEL;
163 info->flash_id = FLASH_UNKNOWN;
164 info->sector_count = 0;
166 addr[0] = 0xFF; /* restore read mode */
167 return (0); /* no or unknown flash */
171 value = addr[2]; /* device ID */
175 case (unsigned char)INTEL_ID_28F640J3A:
176 info->flash_id += FLASH_28F640J3A;
177 info->sector_count = 64;
178 info->size = 0x00800000;
181 case (unsigned char)INTEL_ID_28F128J3A:
182 info->flash_id += FLASH_28F128J3A;
183 info->sector_count = 128;
184 info->size = 0x01000000;
185 break; /* => 16 MB */
188 info->flash_id = FLASH_UNKNOWN;
192 if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
193 printf ("** ERROR: sector count %d > max (%d) **\n",
194 info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
195 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
198 addr[0] = 0xFF; /* restore read mode */
204 /*-----------------------------------------------------------------------
207 int flash_erase (flash_info_t * info, int s_first, int s_last)
209 int flag, prot, sect;
213 if ((s_first < 0) || (s_first > s_last)) {
214 if (info->flash_id == FLASH_UNKNOWN) {
215 printf ("- missing\n");
217 printf ("- no sectors to erase\n");
222 type = (info->flash_id & FLASH_VENDMASK);
223 if ((type != FLASH_MAN_INTEL)) {
224 printf ("Can't erase unknown flash type %08lx - aborted\n",
230 for (sect = s_first; sect <= s_last; ++sect) {
231 if (info->protect[sect]) {
237 printf ("- Warning: %d protected sectors will not be erased!\n", prot);
241 /* Disable interrupts which might cause a timeout here */
242 flag = disable_interrupts ();
244 /* Start erase on unprotected sectors */
245 for (sect = s_first; sect <= s_last; sect++) {
246 if (info->protect[sect] == 0) { /* not protected */
247 volatile unsigned char *addr;
248 unsigned char status;
250 printf ("Erasing sector %2d ... ", sect);
252 /* arm simple, non interrupt dependent timer */
253 reset_timer_masked ();
255 addr = (volatile unsigned char *) (info->start[sect]);
256 *addr = 0x50; /* clear status register */
257 *addr = 0x20; /* erase setup */
258 *addr = 0xD0; /* erase confirm */
260 while (((status = *addr) & 0x80) != 0x80) {
261 if (get_timer_masked () >
262 CONFIG_SYS_FLASH_ERASE_TOUT) {
263 printf ("Timeout\n");
264 *addr = 0xB0; /* suspend erase */
265 *addr = 0xFF; /* reset to read mode */
271 *addr = 0x50; /* clear status register cmd */
272 *addr = 0xFF; /* resest to read mode */
280 /*-----------------------------------------------------------------------
281 * Copy memory to flash, returns:
284 * 2 - Flash not erased
285 * 4 - Flash not identified
288 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
292 int count, i, l, rc, port_width;
294 if (info->flash_id == FLASH_UNKNOWN)
301 * handle unaligned start bytes
303 if ((l = addr - wp) != 0) {
305 for (i = 0, cp = wp; i < l; ++i, ++cp) {
306 data = (data << 8) | (*(uchar *) cp);
308 for (; i < port_width && cnt > 0; ++i) {
309 data = (data << 8) | *src++;
313 for (; cnt == 0 && i < port_width; ++i, ++cp) {
314 data = (data << 8) | (*(uchar *) cp);
317 if ((rc = write_data (info, wp, data)) != 0) {
324 * handle word aligned part
327 while (cnt >= port_width) {
329 for (i = 0; i < port_width; ++i) {
330 data = (data << 8) | *src++;
332 if ((rc = write_data (info, wp, data)) != 0) {
337 if (count++ > 0x800) {
348 * handle unaligned tail bytes
351 for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
352 data = (data << 8) | *src++;
355 for (; i < port_width; ++i, ++cp) {
356 data = (data << 8) | (*(uchar *) cp);
359 return (write_data (info, wp, data));
362 /*-----------------------------------------------------------------------
363 * Write a word or halfword to Flash, returns:
366 * 2 - Flash not erased
368 static int write_data (flash_info_t * info, ulong dest, unsigned char data)
370 volatile unsigned char *addr = (volatile unsigned char *) dest;
374 /* Check if Flash is (sufficiently) erased */
375 if ((*addr & data) != data) {
376 printf ("not erased at %08lx (%lx)\n", (ulong) addr,
380 /* Disable interrupts which might cause a timeout here */
381 flag = disable_interrupts ();
383 *addr = 0x40; /* write setup */
386 /* arm simple, non interrupt dependent timer */
387 reset_timer_masked ();
389 /* wait while polling the status register */
390 while (((status = *addr) & 0x80) != 0x80) {
391 if (get_timer_masked () > CONFIG_SYS_FLASH_WRITE_TOUT) {
392 *addr = 0xFF; /* restore read mode */
397 *addr = 0xFF; /* restore read mode */
402 void inline spin_wheel (void)
405 static char w[] = "\\/-";
407 printf ("\010%c", w[p]);
408 (++p == 3) ? (p = 0) : 0;