3 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
5 * (C) Copyright 2001-2004
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
9 * Texas Instruments, <www.ti.com>
10 * Kshitij Gupta <Kshitij@ti.com>
12 * See file CREDITS for list of people who contributed to this
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License as
17 * published by the Free Software Foundation; either version 2 of
18 * the License, or (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
32 #include <linux/byteorder/swab.h>
34 #define PHYS_FLASH_SECT_SIZE 0x00020000 /* 256 KB sectors (x2) */
35 flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
37 /* Board support for 1 or 2 flash devices */
38 #define FLASH_PORT_WIDTH32
39 #undef FLASH_PORT_WIDTH16
41 #ifdef FLASH_PORT_WIDTH16
42 #define FLASH_PORT_WIDTH ushort
43 #define FLASH_PORT_WIDTHV vu_short
44 #define SWAP(x) __swab16(x)
46 #define FLASH_PORT_WIDTH ulong
47 #define FLASH_PORT_WIDTHV vu_long
48 #define SWAP(x) __swab32(x)
51 #define FPW FLASH_PORT_WIDTH
52 #define FPWV FLASH_PORT_WIDTHV
54 #define mb() __asm__ __volatile__ ("" : : : "memory")
57 /* Flash Organization Structure */
58 typedef struct OrgDef {
59 unsigned int sector_number;
60 unsigned int sector_size;
64 /* Flash Organizations */
65 OrgDef OrgIntel_28F256K3[] = {
66 {256, 128 * 1024}, /* 256 * 128kBytes sectors */
70 /*-----------------------------------------------------------------------
73 unsigned long flash_init (void);
74 static ulong flash_get_size (FPW * addr, flash_info_t * info);
75 static int write_data (flash_info_t * info, ulong dest, FPW data);
76 static void flash_get_offsets (ulong base, flash_info_t * info);
77 void inline spin_wheel (void);
78 void flash_print_info (flash_info_t * info);
79 void flash_unprotect_sectors (FPWV * addr);
80 int flash_erase (flash_info_t * info, int s_first, int s_last);
81 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt);
83 /*-----------------------------------------------------------------------
86 static void flash_vpp(int on)
90 tmp = *(unsigned int *)(VERSATILE_FLASHCTRL);
93 tmp |= VERSATILE_FLASHPROG_FLVPPEN;
95 tmp &= ~VERSATILE_FLASHPROG_FLVPPEN;
97 *(unsigned int *)(VERSATILE_FLASHCTRL) = tmp;
100 unsigned long flash_init (void)
104 for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
108 flash_get_size ((FPW *) PHYS_FLASH_1, &flash_info[i]);
109 flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
113 panic ("configured too many flash banks!\n");
116 size += flash_info[i].size;
119 /* Protect monitor and environment sectors
121 flash_protect (FLAG_PROTECT_SET,
123 CFG_FLASH_BASE + monitor_flash_len - 1, &flash_info[0]);
128 /*-----------------------------------------------------------------------
130 static void flash_get_offsets (ulong base, flash_info_t * info)
135 pOrgDef = OrgIntel_28F256K3;
136 if (info->flash_id == FLASH_UNKNOWN) {
140 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
141 for (i = 0; i < info->sector_count; i++) {
143 info->start[i] = base + (i * 0x8000);
144 info->protect[i] = 0;
146 info->start[i] = base +
147 (i * PHYS_FLASH_SECT_SIZE);
148 info->protect[i] = 0;
154 /*-----------------------------------------------------------------------
156 void flash_print_info (flash_info_t * info)
160 if (info->flash_id == FLASH_UNKNOWN) {
161 printf ("missing or unknown FLASH type\n");
165 switch (info->flash_id & FLASH_VENDMASK) {
166 case FLASH_MAN_INTEL:
170 printf ("Unknown Vendor ");
174 switch (info->flash_id & FLASH_TYPEMASK) {
175 case FLASH_28F256L18T:
176 printf ("FLASH 28F256L18T\n");
179 printf ("FLASH 28F256K3\n");
182 printf ("Unknown Chip Type\n");
186 printf (" Size: %ld MB in %d Sectors\n",
187 info->size >> 20, info->sector_count);
189 printf (" Sector Start Addresses:");
190 for (i = 0; i < info->sector_count; ++i) {
194 info->start[i], info->protect[i] ? " (RO)" : " ");
201 * The following code cannot be run from FLASH!
203 static ulong flash_get_size (FPW * addr, flash_info_t * info)
207 /* Write auto select command: read Manufacturer ID */
208 addr[0x5555] = (FPW) 0x00AA00AA;
209 addr[0x2AAA] = (FPW) 0x00550055;
210 addr[0x5555] = (FPW) 0x00900090;
216 case (FPW) INTEL_MANUFACT:
217 info->flash_id = FLASH_MAN_INTEL;
221 info->flash_id = FLASH_UNKNOWN;
222 info->sector_count = 0;
224 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
225 return (0); /* no or unknown flash */
229 value = addr[1]; /* device ID */
232 case (FPW) (INTEL_ID_28F256L18T):
233 info->flash_id += FLASH_28F256L18T;
234 info->sector_count = 259;
235 info->size = 0x02000000;
236 break; /* => 32 MB */
238 case (FPW)(INTEL_ID_28F256K3):
239 info->flash_id += FLASH_28F256K3;
240 info->sector_count = 256;
241 info->size = 0x02000000;
242 printf ("\Intel StrataFlash 28F256K3C device initialized\n");
246 info->flash_id = FLASH_UNKNOWN;
250 if (info->sector_count > CFG_MAX_FLASH_SECT) {
251 printf ("** ERROR: sector count %d > max (%d) **\n",
252 info->sector_count, CFG_MAX_FLASH_SECT);
253 info->sector_count = CFG_MAX_FLASH_SECT;
256 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
262 /* unprotects a sector for write and erase
263 * on some intel parts, this unprotects the entire chip, but it
264 * wont hurt to call this additional times per sector...
266 void flash_unprotect_sectors (FPWV * addr)
268 #define PD_FINTEL_WSMS_READY_MASK 0x0080
270 *addr = (FPW) 0x00500050; /* clear status register */
272 /* this sends the clear lock bit command */
273 *addr = (FPW) 0x00600060;
274 *addr = (FPW) 0x00D000D0;
278 /*-----------------------------------------------------------------------
281 int flash_erase (flash_info_t * info, int s_first, int s_last)
283 int flag, prot, sect;
284 ulong type, start, last;
287 if ((s_first < 0) || (s_first > s_last)) {
288 if (info->flash_id == FLASH_UNKNOWN) {
289 printf ("- missing\n");
291 printf ("- no sectors to erase\n");
296 type = (info->flash_id & FLASH_VENDMASK);
297 if ((type != FLASH_MAN_INTEL)) {
298 printf ("Can't erase unknown flash type %08lx - aborted\n",
304 for (sect = s_first; sect <= s_last; ++sect) {
305 if (info->protect[sect]) {
311 printf ("- Warning: %d protected sectors will not be erased!\n",
319 start = get_timer (0);
322 /* Disable interrupts which might cause a timeout here */
323 flag = disable_interrupts ();
325 /* Start erase on unprotected sectors */
326 for (sect = s_first; sect <= s_last; sect++) {
327 if (info->protect[sect] == 0) { /* not protected */
328 FPWV *addr = (FPWV *) (info->start[sect]);
331 printf ("Erasing sector %2d ... ", sect);
333 flash_unprotect_sectors (addr);
335 /* arm simple, non interrupt dependent timer */
336 reset_timer_masked ();
338 *addr = (FPW) 0x00500050;/* clear status register */
339 *addr = (FPW) 0x00200020;/* erase setup */
340 *addr = (FPW) 0x00D000D0;/* erase confirm */
343 *addr) & (FPW) 0x00800080) !=
345 if (get_timer_masked () >
346 CFG_FLASH_ERASE_TOUT) {
347 printf ("Timeout\n");
349 *addr = (FPW) 0x00B000B0;
350 /* reset to read mode */
351 *addr = (FPW) 0x00FF00FF;
357 /* clear status register cmd. */
358 *addr = (FPW) 0x00500050;
359 *addr = (FPW) 0x00FF00FF;/* resest to read mode */
369 /*-----------------------------------------------------------------------
370 * Copy memory to flash, returns:
373 * 2 - Flash not erased
374 * 4 - Flash not identified
377 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
381 int count, i, l, rc, port_width;
383 if (info->flash_id == FLASH_UNKNOWN) {
386 /* get lower word aligned address */
387 #ifdef FLASH_PORT_WIDTH16
398 * handle unaligned start bytes
400 if ((l = addr - wp) != 0) {
402 for (i = 0, cp = wp; i < l; ++i, ++cp) {
403 data = (data << 8) | (*(uchar *) cp);
405 for (; i < port_width && cnt > 0; ++i) {
406 data = (data << 8) | *src++;
410 for (; cnt == 0 && i < port_width; ++i, ++cp) {
411 data = (data << 8) | (*(uchar *) cp);
414 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
422 * handle word aligned part
425 while (cnt >= port_width) {
427 for (i = 0; i < port_width; ++i) {
428 data = (data << 8) | *src++;
430 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
436 if (count++ > 0x800) {
448 * handle unaligned tail bytes
451 for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
452 data = (data << 8) | *src++;
455 for (; i < port_width; ++i, ++cp) {
456 data = (data << 8) | (*(uchar *) cp);
459 rc = write_data (info, wp, SWAP (data));
466 /*-----------------------------------------------------------------------
467 * Write a word or halfword to Flash, returns:
470 * 2 - Flash not erased
472 static int write_data (flash_info_t * info, ulong dest, FPW data)
474 FPWV *addr = (FPWV *) dest;
478 /* Check if Flash is (sufficiently) erased */
479 if ((*addr & data) != data) {
480 printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr);
486 flash_unprotect_sectors (addr);
487 /* Disable interrupts which might cause a timeout here */
488 flag = disable_interrupts ();
489 *addr = (FPW) 0x00400040; /* write setup */
492 /* arm simple, non interrupt dependent timer */
493 reset_timer_masked ();
495 /* wait while polling the status register */
496 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
497 if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
498 *addr = (FPW) 0x00FF00FF; /* restore read mode */
503 *addr = (FPW) 0x00FF00FF; /* restore read mode */
508 void inline spin_wheel (void)
511 static char w[] = "\\/-";
513 printf ("\010%c", w[p]);
514 (++p == 3) ? (p = 0) : 0;