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[CONFIG_SYS_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);
84 /*-----------------------------------------------------------------------
87 unsigned long flash_init (void)
91 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
94 flash_get_size ((FPW *) PHYS_FLASH_1, &flash_info[i]);
95 flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
98 panic ("configured too many flash banks!\n");
101 size += flash_info[i].size;
104 /* Protect monitor and environment sectors
106 flash_protect (FLAG_PROTECT_SET,
107 CONFIG_SYS_FLASH_BASE,
108 CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1, &flash_info[0]);
110 flash_protect (FLAG_PROTECT_SET,
112 CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
117 /*-----------------------------------------------------------------------
119 static void flash_get_offsets (ulong base, flash_info_t * info)
123 if (info->flash_id == FLASH_UNKNOWN) {
127 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
128 for (i = 0; i < info->sector_count; i++) {
130 info->start[i] = base + (i * 0x8000);
131 info->protect[i] = 0;
133 info->start[i] = base +
134 (i * PHYS_FLASH_SECT_SIZE);
135 info->protect[i] = 0;
141 /*-----------------------------------------------------------------------
143 void flash_print_info (flash_info_t * info)
147 if (info->flash_id == FLASH_UNKNOWN) {
148 printf ("missing or unknown FLASH type\n");
152 switch (info->flash_id & FLASH_VENDMASK) {
153 case FLASH_MAN_INTEL:
157 printf ("Unknown Vendor ");
161 switch (info->flash_id & FLASH_TYPEMASK) {
162 case FLASH_28F256L18T:
163 printf ("FLASH 28F256L18T\n");
166 printf ("Unknown Chip Type\n");
170 printf (" Size: %ld MB in %d Sectors\n",
171 info->size >> 20, info->sector_count);
173 printf (" Sector Start Addresses:");
174 for (i = 0; i < info->sector_count; ++i) {
178 info->start[i], info->protect[i] ? " (RO)" : " ");
185 * The following code cannot be run from FLASH!
187 static ulong flash_get_size (FPW * addr, flash_info_t * info)
191 /* Write auto select command: read Manufacturer ID */
192 addr[0x5555] = (FPW) 0x00AA00AA;
193 addr[0x2AAA] = (FPW) 0x00550055;
194 addr[0x5555] = (FPW) 0x00900090;
201 case (FPW) INTEL_MANUFACT:
202 info->flash_id = FLASH_MAN_INTEL;
206 info->flash_id = FLASH_UNKNOWN;
207 info->sector_count = 0;
209 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
210 return (0); /* no or unknown flash */
214 value = addr[1]; /* device ID */
217 case (FPW) (INTEL_ID_28F256L18T):
218 info->flash_id += FLASH_28F256L18T;
219 info->sector_count = 259;
220 info->size = 0x02000000;
221 break; /* => 32 MB */
224 info->flash_id = FLASH_UNKNOWN;
228 if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
229 printf ("** ERROR: sector count %d > max (%d) **\n",
230 info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
231 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
234 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
240 /* unprotects a sector for write and erase
241 * on some intel parts, this unprotects the entire chip, but it
242 * wont hurt to call this additional times per sector...
244 void flash_unprotect_sectors (FPWV * addr)
246 #define PD_FINTEL_WSMS_READY_MASK 0x0080
248 *addr = (FPW) 0x00500050; /* clear status register */
250 /* this sends the clear lock bit command */
251 *addr = (FPW) 0x00600060;
252 *addr = (FPW) 0x00D000D0;
256 /*-----------------------------------------------------------------------
259 int flash_erase (flash_info_t * info, int s_first, int s_last)
261 int flag, prot, sect;
265 if ((s_first < 0) || (s_first > s_last)) {
266 if (info->flash_id == FLASH_UNKNOWN) {
267 printf ("- missing\n");
269 printf ("- no sectors to erase\n");
274 type = (info->flash_id & FLASH_VENDMASK);
275 if ((type != FLASH_MAN_INTEL)) {
276 printf ("Can't erase unknown flash type %08lx - aborted\n",
282 for (sect = s_first; sect <= s_last; ++sect) {
283 if (info->protect[sect]) {
289 printf ("- Warning: %d protected sectors will not be erased!\n",
295 /* Disable interrupts which might cause a timeout here */
296 flag = disable_interrupts ();
298 /* Start erase on unprotected sectors */
299 for (sect = s_first; sect <= s_last; sect++) {
300 if (info->protect[sect] == 0) { /* not protected */
301 FPWV *addr = (FPWV *) (info->start[sect]);
304 printf ("Erasing sector %2d ... ", sect);
306 flash_unprotect_sectors (addr);
308 /* arm simple, non interrupt dependent timer */
309 start = get_timer(0);
311 *addr = (FPW) 0x00500050;/* clear status register */
312 *addr = (FPW) 0x00200020;/* erase setup */
313 *addr = (FPW) 0x00D000D0;/* erase confirm */
316 *addr) & (FPW) 0x00800080) !=
318 if (get_timer(start) >
319 CONFIG_SYS_FLASH_ERASE_TOUT) {
320 printf ("Timeout\n");
322 *addr = (FPW) 0x00B000B0;
323 /* reset to read mode */
324 *addr = (FPW) 0x00FF00FF;
330 /* clear status register cmd. */
331 *addr = (FPW) 0x00500050;
332 *addr = (FPW) 0x00FF00FF;/* resest to read mode */
343 /*-----------------------------------------------------------------------
344 * Copy memory to flash, returns:
347 * 2 - Flash not erased
348 * 4 - Flash not identified
351 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
355 int count, i, l, rc, port_width;
357 if (info->flash_id == FLASH_UNKNOWN) {
360 /* get lower word aligned address */
361 #ifdef FLASH_PORT_WIDTH16
370 * handle unaligned start bytes
372 if ((l = addr - wp) != 0) {
374 for (i = 0, cp = wp; i < l; ++i, ++cp) {
375 data = (data << 8) | (*(uchar *) cp);
377 for (; i < port_width && cnt > 0; ++i) {
378 data = (data << 8) | *src++;
382 for (; cnt == 0 && i < port_width; ++i, ++cp) {
383 data = (data << 8) | (*(uchar *) cp);
386 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
393 * handle word aligned part
396 while (cnt >= port_width) {
398 for (i = 0; i < port_width; ++i) {
399 data = (data << 8) | *src++;
401 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
406 if (count++ > 0x800) {
417 * handle unaligned tail bytes
420 for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
421 data = (data << 8) | *src++;
424 for (; i < port_width; ++i, ++cp) {
425 data = (data << 8) | (*(uchar *) cp);
428 return (write_data (info, wp, SWAP (data)));
431 /*-----------------------------------------------------------------------
432 * Write a word or halfword to Flash, returns:
435 * 2 - Flash not erased
437 static int write_data (flash_info_t * info, ulong dest, FPW data)
439 FPWV *addr = (FPWV *) dest;
444 /* Check if Flash is (sufficiently) erased */
445 if ((*addr & data) != data) {
446 printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr);
449 flash_unprotect_sectors (addr);
450 /* Disable interrupts which might cause a timeout here */
451 flag = disable_interrupts ();
452 *addr = (FPW) 0x00400040; /* write setup */
455 /* arm simple, non interrupt dependent timer */
456 start = get_timer(0);
458 /* wait while polling the status register */
459 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
460 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
466 *addr = (FPW)0x00FF00FF; /* restore read mode */
472 void inline spin_wheel (void)
475 static char w[] = "\\/-";
477 printf ("\010%c", w[p]);
478 (++p == 3) ? (p = 0) : 0;