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>
31 flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
33 /* Board support for 1 or 2 flash devices */
34 #define FLASH_PORT_WIDTH32
35 #undef FLASH_PORT_WIDTH16
37 #ifdef FLASH_PORT_WIDTH16
38 #define FLASH_PORT_WIDTH ushort
39 #define FLASH_PORT_WIDTHV vu_short
40 #define SWAP(x) __swab16(x)
42 #define FLASH_PORT_WIDTH ulong
43 #define FLASH_PORT_WIDTHV vu_long
44 #define SWAP(x) __swab32(x)
47 #define FPW FLASH_PORT_WIDTH
48 #define FPWV FLASH_PORT_WIDTHV
50 #define mb() __asm__ __volatile__ ("" : : : "memory")
52 /*-----------------------------------------------------------------------
55 static ulong flash_get_size (FPW *addr, flash_info_t *info);
56 static int write_data (flash_info_t *info, ulong dest, FPW data);
57 static void flash_get_offsets (ulong base, flash_info_t *info);
58 void inline spin_wheel (void);
60 /*-----------------------------------------------------------------------
63 unsigned long flash_init (void)
68 for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
71 flash_get_size ((FPW *) PHYS_FLASH_1, &flash_info[i]);
72 flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
75 flash_get_size ((FPW *) PHYS_FLASH_2, &flash_info[i]);
76 flash_get_offsets (PHYS_FLASH_2, &flash_info[i]);
79 panic ("configured too many flash banks!\n");
82 size += flash_info[i].size;
85 /* Protect monitor and environment sectors
87 flash_protect ( FLAG_PROTECT_SET,
89 CFG_FLASH_BASE + monitor_flash_len - 1,
92 flash_protect ( FLAG_PROTECT_SET,
94 CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0] );
99 /*-----------------------------------------------------------------------
101 static void flash_get_offsets (ulong base, flash_info_t *info)
105 if (info->flash_id == FLASH_UNKNOWN) {
109 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
110 for (i = 0; i < info->sector_count; i++) {
111 info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
112 info->protect[i] = 0;
117 /*-----------------------------------------------------------------------
119 void flash_print_info (flash_info_t *info)
123 if (info->flash_id == FLASH_UNKNOWN) {
124 printf ("missing or unknown FLASH type\n");
128 switch (info->flash_id & FLASH_VENDMASK) {
129 case FLASH_MAN_INTEL:
133 printf ("Unknown Vendor ");
137 switch (info->flash_id & FLASH_TYPEMASK) {
138 case FLASH_28F128J3A:
139 printf ("28F128J3A\n");
142 printf ("Unknown Chip Type\n");
146 printf (" Size: %ld MB in %d Sectors\n",
147 info->size >> 20, info->sector_count);
149 printf (" Sector Start Addresses:");
150 for (i = 0; i < info->sector_count; ++i) {
155 info->protect[i] ? " (RO)" : " ");
162 * The following code cannot be run from FLASH!
164 static ulong flash_get_size (FPW *addr, flash_info_t *info)
168 /* Write auto select command: read Manufacturer ID */
169 addr[0x5555] = (FPW) 0x00AA00AA;
170 addr[0x2AAA] = (FPW) 0x00550055;
171 addr[0x5555] = (FPW) 0x00900090;
178 case (FPW) INTEL_MANUFACT:
179 info->flash_id = FLASH_MAN_INTEL;
183 info->flash_id = FLASH_UNKNOWN;
184 info->sector_count = 0;
186 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
187 return (0); /* no or unknown flash */
191 value = addr[1]; /* device ID */
195 case (FPW) INTEL_ID_28F128J3A:
196 info->flash_id += FLASH_28F128J3A;
197 info->sector_count = 128;
198 info->size = 0x02000000;
199 break; /* => 16 MB */
202 info->flash_id = FLASH_UNKNOWN;
206 if (info->sector_count > CFG_MAX_FLASH_SECT) {
207 printf ("** ERROR: sector count %d > max (%d) **\n",
208 info->sector_count, CFG_MAX_FLASH_SECT);
209 info->sector_count = CFG_MAX_FLASH_SECT;
212 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
218 /*-----------------------------------------------------------------------
221 int flash_erase (flash_info_t *info, int s_first, int s_last)
223 int flag, prot, sect;
224 ulong type, start, last;
227 if ((s_first < 0) || (s_first > s_last)) {
228 if (info->flash_id == FLASH_UNKNOWN) {
229 printf ("- missing\n");
231 printf ("- no sectors to erase\n");
236 type = (info->flash_id & FLASH_VENDMASK);
237 if ((type != FLASH_MAN_INTEL)) {
238 printf ("Can't erase unknown flash type %08lx - aborted\n",
244 for (sect = s_first; sect <= s_last; ++sect) {
245 if (info->protect[sect]) {
251 printf ("- Warning: %d protected sectors will not be erased!\n",
257 start = get_timer (0);
260 /* Disable interrupts which might cause a timeout here */
261 flag = disable_interrupts ();
263 /* Start erase on unprotected sectors */
264 for (sect = s_first; sect <= s_last; sect++) {
265 if (info->protect[sect] == 0) { /* not protected */
266 FPWV *addr = (FPWV *) (info->start[sect]);
269 printf ("Erasing sector %2d ... ", sect);
271 /* arm simple, non interrupt dependent timer */
272 reset_timer_masked ();
274 *addr = (FPW) 0x00500050; /* clear status register */
275 *addr = (FPW) 0x00200020; /* erase setup */
276 *addr = (FPW) 0x00D000D0; /* erase confirm */
278 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
279 if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
280 printf ("Timeout\n");
281 *addr = (FPW) 0x00B000B0; /* suspend erase */
282 *addr = (FPW) 0x00FF00FF; /* reset to read mode */
288 *addr = 0x00500050; /* clear status register cmd. */
289 *addr = 0x00FF00FF; /* resest to read mode */
297 /*-----------------------------------------------------------------------
298 * Copy memory to flash, returns:
301 * 2 - Flash not erased
302 * 4 - Flash not identified
305 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
309 int count, i, l, rc, port_width;
311 if (info->flash_id == FLASH_UNKNOWN) {
314 /* get lower word aligned address */
315 #ifdef FLASH_PORT_WIDTH16
324 * handle unaligned start bytes
326 if ((l = addr - wp) != 0) {
328 for (i = 0, cp = wp; i < l; ++i, ++cp) {
329 data = (data << 8) | (*(uchar *) cp);
331 for (; i < port_width && cnt > 0; ++i) {
332 data = (data << 8) | *src++;
336 for (; cnt == 0 && i < port_width; ++i, ++cp) {
337 data = (data << 8) | (*(uchar *) cp);
340 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
347 * handle word aligned part
350 while (cnt >= port_width) {
352 for (i = 0; i < port_width; ++i) {
353 data = (data << 8) | *src++;
355 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
360 if (count++ > 0x800) {
371 * handle unaligned tail bytes
374 for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
375 data = (data << 8) | *src++;
378 for (; i < port_width; ++i, ++cp) {
379 data = (data << 8) | (*(uchar *) cp);
382 return (write_data (info, wp, SWAP (data)));
385 /*-----------------------------------------------------------------------
386 * Write a word or halfword to Flash, returns:
389 * 2 - Flash not erased
391 static int write_data (flash_info_t *info, ulong dest, FPW data)
393 FPWV *addr = (FPWV *) dest;
397 /* Check if Flash is (sufficiently) erased */
398 if ((*addr & data) != data) {
399 printf ("not erased at %08lx (%lx)\n", (ulong) addr, *addr);
402 /* Disable interrupts which might cause a timeout here */
403 flag = disable_interrupts ();
405 *addr = (FPW) 0x00400040; /* write setup */
408 /* arm simple, non interrupt dependent timer */
409 reset_timer_masked ();
411 /* wait while polling the status register */
412 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
413 if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
414 *addr = (FPW) 0x00FF00FF; /* restore read mode */
419 *addr = (FPW) 0x00FF00FF; /* restore read mode */
424 void inline spin_wheel (void)
427 static char w[] = "\\/-";
429 printf ("\010%c", w[p]);
430 (++p == 3) ? (p = 0) : 0;