3 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
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")
58 /* Flash Organization Structure */
59 typedef struct OrgDef {
60 unsigned int sector_number;
61 unsigned int sector_size;
65 /* Flash Organizations */
66 OrgDef OrgIntel_28F256L18T[] = {
67 {4, 32 * 1024}, /* 4 * 32kBytes sectors */
68 {255, 128 * 1024}, /* 255 * 128kBytes sectors */
72 /*-----------------------------------------------------------------------
75 unsigned long flash_init (void);
76 static ulong flash_get_size (FPW * addr, flash_info_t * info);
77 static int write_data (flash_info_t * info, ulong dest, FPW data);
78 static void flash_get_offsets (ulong base, flash_info_t * info);
79 void inline spin_wheel (void);
80 void flash_print_info (flash_info_t * info);
81 void flash_unprotect_sectors (FPWV * addr);
82 int flash_erase (flash_info_t * info, int s_first, int s_last);
83 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt);
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]);
99 panic ("configured to many flash banks!\n");
102 size += flash_info[i].size;
105 /* Protect monitor and environment sectors
107 flash_protect (FLAG_PROTECT_SET,
109 CFG_FLASH_BASE + monitor_flash_len - 1, &flash_info[0]);
111 flash_protect (FLAG_PROTECT_SET,
113 CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
118 /*-----------------------------------------------------------------------
120 static void flash_get_offsets (ulong base, flash_info_t * info)
125 pOrgDef = OrgIntel_28F256L18T;
126 if (info->flash_id == FLASH_UNKNOWN) {
130 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
131 for (i = 0; i < info->sector_count; i++) {
133 info->start[i] = base + (i * 0x8000);
134 info->protect[i] = 0;
136 info->start[i] = base +
137 (i * PHYS_FLASH_SECT_SIZE);
138 info->protect[i] = 0;
144 /*-----------------------------------------------------------------------
146 void flash_print_info (flash_info_t * info)
150 if (info->flash_id == FLASH_UNKNOWN) {
151 printf ("missing or unknown FLASH type\n");
155 switch (info->flash_id & FLASH_VENDMASK) {
156 case FLASH_MAN_INTEL:
160 printf ("Unknown Vendor ");
164 switch (info->flash_id & FLASH_TYPEMASK) {
165 case FLASH_28F256L18T:
166 printf ("FLASH 28F256L18T\n");
169 printf ("Unknown Chip Type\n");
173 printf (" Size: %ld MB in %d Sectors\n",
174 info->size >> 20, info->sector_count);
176 printf (" Sector Start Addresses:");
177 for (i = 0; i < info->sector_count; ++i) {
181 info->start[i], info->protect[i] ? " (RO)" : " ");
188 * The following code cannot be run from FLASH!
190 static ulong flash_get_size (FPW * addr, flash_info_t * info)
194 /* Write auto select command: read Manufacturer ID */
195 addr[0x5555] = (FPW) 0x00AA00AA;
196 addr[0x2AAA] = (FPW) 0x00550055;
197 addr[0x5555] = (FPW) 0x00900090;
204 case (FPW) INTEL_MANUFACT:
205 info->flash_id = FLASH_MAN_INTEL;
209 info->flash_id = FLASH_UNKNOWN;
210 info->sector_count = 0;
212 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
213 return (0); /* no or unknown flash */
217 value = addr[1]; /* device ID */
220 case (FPW) (INTEL_ID_28F256L18T):
221 info->flash_id += FLASH_28F256L18T;
222 info->sector_count = 259;
223 info->size = 0x02000000;
224 break; /* => 32 MB */
227 info->flash_id = FLASH_UNKNOWN;
231 if (info->sector_count > CFG_MAX_FLASH_SECT) {
232 printf ("** ERROR: sector count %d > max (%d) **\n",
233 info->sector_count, CFG_MAX_FLASH_SECT);
234 info->sector_count = CFG_MAX_FLASH_SECT;
237 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
245 /* unprotects a sector for write and erase
246 * on some intel parts, this unprotects the entire chip, but it
247 * wont hurt to call this additional times per sector...
249 void flash_unprotect_sectors (FPWV * addr)
251 #define PD_FINTEL_WSMS_READY_MASK 0x0080
253 *addr = (FPW) 0x00500050; /* clear status register */
255 /* this sends the clear lock bit command */
256 *addr = (FPW) 0x00600060;
257 *addr = (FPW) 0x00D000D0;
261 /*-----------------------------------------------------------------------
264 int flash_erase (flash_info_t * info, int s_first, int s_last)
266 int flag, prot, sect;
267 ulong type, start, last;
270 if ((s_first < 0) || (s_first > s_last)) {
271 if (info->flash_id == FLASH_UNKNOWN) {
272 printf ("- missing\n");
274 printf ("- no sectors to erase\n");
279 type = (info->flash_id & FLASH_VENDMASK);
280 if ((type != FLASH_MAN_INTEL)) {
281 printf ("Can't erase unknown flash type %08lx - aborted\n",
287 for (sect = s_first; sect <= s_last; ++sect) {
288 if (info->protect[sect]) {
294 printf ("- Warning: %d protected sectors will not be erased!\n",
303 start = get_timer (0);
306 /* Disable interrupts which might cause a timeout here */
307 flag = disable_interrupts ();
309 /* Start erase on unprotected sectors */
310 for (sect = s_first; sect <= s_last; sect++) {
311 if (info->protect[sect] == 0) { /* not protected */
312 FPWV *addr = (FPWV *) (info->start[sect]);
315 printf ("Erasing sector %2d ... ", sect);
317 flash_unprotect_sectors (addr);
319 /* arm simple, non interrupt dependent timer */
320 reset_timer_masked ();
322 *addr = (FPW) 0x00500050;/* clear status register */
323 *addr = (FPW) 0x00200020;/* erase setup */
324 *addr = (FPW) 0x00D000D0;/* erase confirm */
327 *addr) & (FPW) 0x00800080) !=
329 if (get_timer_masked () >
330 CFG_FLASH_ERASE_TOUT) {
331 printf ("Timeout\n");
333 *addr = (FPW) 0x00B000B0;
334 /* reset to read mode */
335 *addr = (FPW) 0x00FF00FF;
341 /* clear status register cmd. */
342 *addr = (FPW) 0x00500050;
343 *addr = (FPW) 0x00FF00FF;/* resest to read mode */
350 /*-----------------------------------------------------------------------
351 * Copy memory to flash, returns:
354 * 2 - Flash not erased
355 * 4 - Flash not identified
358 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
362 int count, i, l, rc, port_width;
364 if (info->flash_id == FLASH_UNKNOWN) {
367 /* get lower word aligned address */
368 #ifdef FLASH_PORT_WIDTH16
377 * handle unaligned start bytes
379 if ((l = addr - wp) != 0) {
381 for (i = 0, cp = wp; i < l; ++i, ++cp) {
382 data = (data << 8) | (*(uchar *) cp);
384 for (; i < port_width && cnt > 0; ++i) {
385 data = (data << 8) | *src++;
389 for (; cnt == 0 && i < port_width; ++i, ++cp) {
390 data = (data << 8) | (*(uchar *) cp);
393 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
400 * handle word aligned part
403 while (cnt >= port_width) {
405 for (i = 0; i < port_width; ++i) {
406 data = (data << 8) | *src++;
408 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
413 if (count++ > 0x800) {
424 * handle unaligned tail bytes
427 for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
428 data = (data << 8) | *src++;
431 for (; i < port_width; ++i, ++cp) {
432 data = (data << 8) | (*(uchar *) cp);
435 return (write_data (info, wp, SWAP (data)));
438 /*-----------------------------------------------------------------------
439 * Write a word or halfword to Flash, returns:
442 * 2 - Flash not erased
444 static int write_data (flash_info_t * info, ulong dest, FPW data)
446 FPWV *addr = (FPWV *) dest;
450 /* Check if Flash is (sufficiently) erased */
451 if ((*addr & data) != data) {
452 printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr);
455 flash_unprotect_sectors (addr);
456 /* Disable interrupts which might cause a timeout here */
457 flag = disable_interrupts ();
458 *addr = (FPW) 0x00400040; /* write setup */
461 /* arm simple, non interrupt dependent timer */
462 reset_timer_masked ();
464 /* wait while polling the status register */
465 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
466 if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
467 *addr = (FPW) 0x00FF00FF; /* restore read mode */
471 *addr = (FPW) 0x00FF00FF; /* restore read mode */
475 void inline spin_wheel (void)
478 static char w[] = "\\/-";
480 printf ("\010%c", w[p]);
481 (++p == 3) ? (p = 0) : 0;