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 #undef FLASH_PORT_WIDTH32
39 #define 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_28F256L18T[] = {
66 {4, 32 * 1024}, /* 4 * 32kBytes sectors */
67 {255, 128 * 1024}, /* 255 * 128kBytes sectors */
71 /*-----------------------------------------------------------------------
74 unsigned long flash_init (void);
75 static ulong flash_get_size (FPW * addr, flash_info_t * info);
76 static int write_data (flash_info_t * info, ulong dest, FPW data);
77 static void flash_get_offsets (ulong base, flash_info_t * info);
78 void inline spin_wheel (void);
79 void flash_print_info (flash_info_t * info);
80 void flash_unprotect_sectors (FPWV * addr);
81 int flash_erase (flash_info_t * info, int s_first, int s_last);
82 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt);
83 void flash_unlock(flash_info_t * info);
85 /*-----------------------------------------------------------------------
88 unsigned long flash_init (void)
92 for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
95 flash_get_size ((FPW *) PHYS_FLASH_1, &flash_info[i]);
96 flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
97 /* to reset the lock bit */
98 flash_unlock(&flash_info[i]);
101 panic ("configured too many flash banks!\n");
104 size += flash_info[i].size;
107 /* Protect monitor and environment sectors
109 flash_protect (FLAG_PROTECT_SET,
111 CFG_FLASH_BASE + monitor_flash_len - 1, &flash_info[0]);
113 flash_protect (FLAG_PROTECT_SET,
115 CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
120 /*-----------------------------------------------------------------------
122 void flash_unlock(flash_info_t * info)
125 for (j=2;j<CFG_MAX_FLASH_SECT;j++){
126 FPWV *addr = (FPWV *) (info->start[j]);
127 flash_unprotect_sectors (addr);
128 *addr = (FPW) 0x00500050;/* clear status register */
129 *addr = (FPW) 0x00FF00FF;/* resest to read mode */
133 /*-----------------------------------------------------------------------
135 static void flash_get_offsets (ulong base, flash_info_t * info)
140 pOrgDef = OrgIntel_28F256L18T;
141 if (info->flash_id == FLASH_UNKNOWN) {
145 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
146 for (i = 0; i < info->sector_count; i++) {
148 info->start[i] = base + (i * 0x8000);
149 info->protect[i] = 0;
151 info->start[i] = base +
152 (i * PHYS_FLASH_SECT_SIZE);
153 info->protect[i] = 0;
159 /*-----------------------------------------------------------------------
161 void flash_print_info (flash_info_t * info)
165 if (info->flash_id == FLASH_UNKNOWN) {
166 printf ("missing or unknown FLASH type\n");
170 switch (info->flash_id & FLASH_VENDMASK) {
171 case FLASH_MAN_INTEL:
175 printf ("Unknown Vendor ");
179 switch (info->flash_id & FLASH_TYPEMASK) {
180 case FLASH_28F256L18T:
181 printf ("FLASH 28F256L18T\n");
184 printf ("Unknown Chip Type\n");
188 printf (" Size: %ld MB in %d Sectors\n",
189 info->size >> 20, info->sector_count);
191 printf (" Sector Start Addresses:");
192 for (i = 0; i < info->sector_count; ++i) {
196 info->start[i], info->protect[i] ? " (RO)" : " ");
203 * The following code cannot be run from FLASH!
205 static ulong flash_get_size (FPW * addr, flash_info_t * info)
209 /* Write auto select command: read Manufacturer ID */
210 addr[0x5555] = (FPW) 0x00AA00AA;
211 addr[0x2AAA] = (FPW) 0x00550055;
212 addr[0x5555] = (FPW) 0x00900090;
219 case (FPW) INTEL_MANUFACT:
220 info->flash_id = FLASH_MAN_INTEL;
224 info->flash_id = FLASH_UNKNOWN;
225 info->sector_count = 0;
227 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
228 return (0); /* no or unknown flash */
232 value = addr[1]; /* device ID */
235 case (FPW) (INTEL_ID_28F256L18T):
236 info->flash_id += FLASH_28F256L18T;
237 info->sector_count = 259;
238 info->size = 0x02000000;
239 break; /* => 32 MB */
242 info->flash_id = FLASH_UNKNOWN;
246 if (info->sector_count > CFG_MAX_FLASH_SECT) {
247 printf ("** ERROR: sector count %d > max (%d) **\n",
248 info->sector_count, CFG_MAX_FLASH_SECT);
249 info->sector_count = CFG_MAX_FLASH_SECT;
252 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
258 /* unprotects a sector for write and erase
259 * on some intel parts, this unprotects the entire chip, but it
260 * wont hurt to call this additional times per sector...
262 void flash_unprotect_sectors (FPWV * addr)
264 #define PD_FINTEL_WSMS_READY_MASK 0x0080
266 *addr = (FPW) 0x00500050; /* clear status register */
268 /* this sends the clear lock bit command */
269 *addr = (FPW) 0x00600060;
270 *addr = (FPW) 0x00D000D0;
274 /*-----------------------------------------------------------------------
277 int flash_erase (flash_info_t * info, int s_first, int s_last)
279 int flag, prot, sect;
280 ulong type, start, last;
283 if ((s_first < 0) || (s_first > s_last)) {
284 if (info->flash_id == FLASH_UNKNOWN) {
285 printf ("- missing\n");
287 printf ("- no sectors to erase\n");
292 type = (info->flash_id & FLASH_VENDMASK);
293 if ((type != FLASH_MAN_INTEL)) {
294 printf ("Can't erase unknown flash type %08lx - aborted\n",
300 for (sect = s_first; sect <= s_last; ++sect) {
301 if (info->protect[sect]) {
307 printf ("- Warning: %d protected sectors will not be erased!\n",
314 start = get_timer (0);
317 /* Disable interrupts which might cause a timeout here */
318 flag = disable_interrupts ();
320 /* Start erase on unprotected sectors */
321 for (sect = s_first; sect <= s_last; sect++) {
322 if (info->protect[sect] == 0) { /* not protected */
323 FPWV *addr = (FPWV *) (info->start[sect]);
326 printf ("Erasing sector %2d ... ", sect);
328 flash_unprotect_sectors (addr);
330 /* arm simple, non interrupt dependent timer */
331 reset_timer_masked ();
333 *addr = (FPW) 0x00500050;/* clear status register */
334 *addr = (FPW) 0x00200020;/* erase setup */
335 *addr = (FPW) 0x00D000D0;/* erase confirm */
338 *addr) & (FPW) 0x00800080) !=
340 if (get_timer_masked () >
341 CFG_FLASH_ERASE_TOUT) {
342 printf ("Timeout\n");
344 *addr = (FPW) 0x00B000B0;
345 /* reset to read mode */
346 *addr = (FPW) 0x00FF00FF;
352 /* clear status register cmd. */
353 *addr = (FPW) 0x00500050;
354 *addr = (FPW) 0x00FF00FF;/* resest to read mode */
361 /*-----------------------------------------------------------------------
362 * Copy memory to flash, returns:
365 * 2 - Flash not erased
366 * 4 - Flash not identified
369 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
373 int count, i, l, rc, port_width;
375 if (info->flash_id == FLASH_UNKNOWN) {
378 /* get lower word aligned address */
379 #ifdef FLASH_PORT_WIDTH16
388 * handle unaligned start bytes
390 if ((l = addr - wp) != 0) {
392 for (i = 0, cp = wp; i < l; ++i, ++cp) {
393 data = (data << 8) | (*(uchar *) cp);
395 for (; i < port_width && cnt > 0; ++i) {
396 data = (data << 8) | *src++;
400 for (; cnt == 0 && i < port_width; ++i, ++cp) {
401 data = (data << 8) | (*(uchar *) cp);
404 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
411 * handle word aligned part
414 while (cnt >= port_width) {
416 for (i = 0; i < port_width; ++i) {
417 data = (data << 8) | *src++;
419 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
424 if (count++ > 0x800) {
435 * handle unaligned tail bytes
438 for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
439 data = (data << 8) | *src++;
442 for (; i < port_width; ++i, ++cp) {
443 data = (data << 8) | (*(uchar *) cp);
446 return (write_data (info, wp, SWAP (data)));
449 /*-----------------------------------------------------------------------
450 * Write a word or halfword to Flash, returns:
453 * 2 - Flash not erased
455 static int write_data (flash_info_t * info, ulong dest, FPW data)
457 FPWV *addr = (FPWV *) dest;
461 /* Check if Flash is (sufficiently) erased */
462 if ((*addr & data) != data) {
463 printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr);
466 /* Disable interrupts which might cause a timeout here */
467 flag = disable_interrupts ();
468 *addr = (FPW) 0x00400040; /* write setup */
471 /* arm simple, non interrupt dependent timer */
472 reset_timer_masked ();
474 /* wait while polling the status register */
475 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
476 if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
477 *addr = (FPW) 0x00FF00FF; /* restore read mode */
481 *addr = (FPW) 0x00FF00FF; /* restore read mode */
485 void inline spin_wheel (void)
488 static char w[] = "\\/-";
490 printf ("\010%c", w[p]);
491 (++p == 3) ? (p = 0) : 0;