3 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
28 #include <linux/byteorder/swab.h>
29 #include <environment.h>
31 #define PHYS_FLASH_SECT_SIZE 0x00020000 /* 256 KB sectors (x2) */
32 flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
34 /* Board support for 1 or 2 flash devices */
35 #undef FLASH_PORT_WIDTH32
36 #define FLASH_PORT_WIDTH16
38 #ifdef FLASH_PORT_WIDTH16
39 #define FLASH_PORT_WIDTH ushort
40 #define FLASH_PORT_WIDTHV vu_short
41 #define SWAP(x) __swab16(x)
43 #define FLASH_PORT_WIDTH ulong
44 #define FLASH_PORT_WIDTHV vu_long
45 #define SWAP(x) __swab32(x)
48 #define FPW FLASH_PORT_WIDTH
49 #define FPWV FLASH_PORT_WIDTHV
51 #define mb() __asm__ __volatile__ ("" : : : "memory")
53 /*-----------------------------------------------------------------------
56 static ulong flash_get_size (FPW * addr, flash_info_t * info);
57 static int write_data (flash_info_t * info, ulong dest, FPW data);
58 static void flash_get_offsets (ulong base, flash_info_t * info);
59 void inline spin_wheel (void);
61 /*-----------------------------------------------------------------------
64 unsigned long flash_init (void)
69 for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
72 flash_get_size ((FPW *) PHYS_FLASH_1, &flash_info[i]);
73 flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
76 flash_get_size ((FPW *) PHYS_FLASH_2, &flash_info[i]);
77 flash_get_offsets (PHYS_FLASH_2, &flash_info[i]);
80 panic ("configured too many flash banks!\n");
83 size += flash_info[i].size;
86 /* Protect monitor and environment sectors
88 flash_protect ( FLAG_PROTECT_SET,
90 CFG_FLASH_BASE + monitor_flash_len - 1,
93 flash_protect ( FLAG_PROTECT_SET,
95 CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
98 #ifdef CFG_ENV_ADDR_REDUND
99 flash_protect ( FLAG_PROTECT_SET,
101 CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1,
108 /*-----------------------------------------------------------------------
110 static void flash_get_offsets (ulong base, flash_info_t * info)
114 if (info->flash_id == FLASH_UNKNOWN) {
118 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
119 for (i = 0; i < info->sector_count; i++) {
120 info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
121 info->protect[i] = 0;
126 /*-----------------------------------------------------------------------
128 void flash_print_info (flash_info_t * info)
132 if (info->flash_id == FLASH_UNKNOWN) {
133 printf ("missing or unknown FLASH type\n");
137 switch (info->flash_id & FLASH_VENDMASK) {
138 case FLASH_MAN_INTEL:
142 printf ("Unknown Vendor ");
146 switch (info->flash_id & FLASH_TYPEMASK) {
147 case FLASH_28F128J3A:
148 printf ("28F128J3A\n");
150 case FLASH_28F640J3A:
151 printf ("28F640J3A\n");
154 printf ("Unknown Chip Type\n");
158 printf (" Size: %ld MB in %d Sectors\n",
159 info->size >> 20, info->sector_count);
161 printf (" Sector Start Addresses:");
162 for (i = 0; i < info->sector_count; ++i) {
167 info->protect[i] ? " (RO)" : " ");
174 * The following code cannot be run from FLASH!
176 static ulong flash_get_size (FPW * addr, flash_info_t * info)
180 /* Write auto select command: read Manufacturer ID */
181 addr[0x5555] = (FPW) 0x00AA00AA;
182 addr[0x2AAA] = (FPW) 0x00550055;
183 addr[0x5555] = (FPW) 0x00900090;
189 case (FPW) INTEL_MANUFACT:
190 info->flash_id = FLASH_MAN_INTEL;
193 info->flash_id = FLASH_UNKNOWN;
194 info->sector_count = 0;
196 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
197 return (0); /* no or unknown flash */
201 value = addr[1]; /* device ID */
203 case (FPW) INTEL_ID_28F128J3A:
204 info->flash_id += FLASH_28F128J3A;
205 info->sector_count = 128;
206 info->size = 0x01000000;
207 break; /* => 16 MB */
208 case (FPW) INTEL_ID_28F640J3A:
209 info->flash_id += FLASH_28F640J3A;
210 info->sector_count = 64;
211 info->size = 0x00800000;
214 info->flash_id = FLASH_UNKNOWN;
218 if (info->sector_count > CFG_MAX_FLASH_SECT) {
219 printf ("** ERROR: sector count %d > max (%d) **\n",
220 info->sector_count, CFG_MAX_FLASH_SECT);
221 info->sector_count = CFG_MAX_FLASH_SECT;
224 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
230 /*-----------------------------------------------------------------------
233 int flash_erase (flash_info_t * info, int s_first, int s_last)
235 int flag, prot, sect;
236 ulong type, start, last;
239 if ((s_first < 0) || (s_first > s_last)) {
240 if (info->flash_id == FLASH_UNKNOWN) {
241 printf ("- missing\n");
243 printf ("- no sectors to erase\n");
248 type = (info->flash_id & FLASH_VENDMASK);
249 if ((type != FLASH_MAN_INTEL)) {
250 printf ("Can't erase unknown flash type %08lx - aborted\n",
256 for (sect = s_first; sect <= s_last; ++sect) {
257 if (info->protect[sect]) {
263 printf ("- Warning: %d protected sectors will not be erased!\n",
269 /*start = get_timer (0); */
272 /* Disable interrupts which might cause a timeout here */
273 flag = disable_interrupts ();
275 /* Start erase on unprotected sectors */
276 for (sect = s_first; sect <= s_last; sect++) {
277 if (info->protect[sect] == 0) { /* not protected */
278 FPWV *addr = (FPWV *) (info->start[sect]);
281 printf ("Erasing sector %2d ... ", sect);
283 /* arm simple, non interrupt dependent timer */
284 reset_timer_masked ();
286 *addr = (FPW) 0x00500050; /* clear status register */
287 *addr = (FPW) 0x00200020; /* erase setup */
288 *addr = (FPW) 0x00D000D0; /* erase confirm */
290 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
291 if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
292 printf ("Timeout\n");
293 *addr = (FPW) 0x00B000B0; /* suspend erase */
294 *addr = (FPW) 0x00FF00FF; /* reset to read mode */
300 *addr = (FPW) 0x00500050; /* clear status register cmd. */
301 *addr = (FPW) 0x00FF00FF; /* resest to read mode */
309 /*-----------------------------------------------------------------------
310 * Copy memory to flash, returns:
313 * 2 - Flash not erased
314 * 4 - Flash not identified
317 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
321 int count, i, l, rc, port_width;
323 if (info->flash_id == FLASH_UNKNOWN) {
326 /* get lower word aligned address */
327 #ifdef FLASH_PORT_WIDTH16
336 * handle unaligned start bytes
338 if ((l = addr - wp) != 0) {
340 for (i = 0, cp = wp; i < l; ++i, ++cp) {
341 data = (data << 8) | (*(uchar *) cp);
343 for (; i < port_width && cnt > 0; ++i) {
344 data = (data << 8) | *src++;
348 for (; cnt == 0 && i < port_width; ++i, ++cp) {
349 data = (data << 8) | (*(uchar *) cp);
352 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
359 * handle word aligned part
362 while (cnt >= port_width) {
364 for (i = 0; i < port_width; ++i) {
365 data = (data << 8) | *src++;
367 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
372 if (count++ > 0x800) {
383 * handle unaligned tail bytes
386 for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
387 data = (data << 8) | *src++;
390 for (; i < port_width; ++i, ++cp) {
391 data = (data << 8) | (*(uchar *) cp);
394 return (write_data (info, wp, SWAP (data)));
397 /*-----------------------------------------------------------------------
398 * Write a word or halfword to Flash, returns:
401 * 2 - Flash not erased
403 static int write_data (flash_info_t * info, ulong dest, FPW data)
405 FPWV *addr = (FPWV *) dest;
409 /* Check if Flash is (sufficiently) erased */
410 if ((*addr & data) != data) {
411 printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr);
414 /* Disable interrupts which might cause a timeout here */
415 flag = disable_interrupts ();
417 *addr = (FPW) 0x00400040; /* write setup */
420 /* arm simple, non interrupt dependent timer */
421 reset_timer_masked ();
423 /* wait while polling the status register */
424 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
426 if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
427 *addr = (FPW) 0x00FF00FF; /* restore read mode */
432 *addr = (FPW) 0x00FF00FF; /* restore read mode */
437 void inline spin_wheel (void)
440 static char w[] = "\\/-";
442 printf ("\010%c", w[p]);
443 (++p == 3) ? (p = 0) : 0;