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)
124 pOrgDef = OrgIntel_28F256L18T;
125 if (info->flash_id == FLASH_UNKNOWN) {
129 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
130 for (i = 0; i < info->sector_count; i++) {
132 info->start[i] = base + (i * 0x8000);
133 info->protect[i] = 0;
135 info->start[i] = base +
136 (i * PHYS_FLASH_SECT_SIZE);
137 info->protect[i] = 0;
143 /*-----------------------------------------------------------------------
145 void flash_print_info (flash_info_t * info)
149 if (info->flash_id == FLASH_UNKNOWN) {
150 printf ("missing or unknown FLASH type\n");
154 switch (info->flash_id & FLASH_VENDMASK) {
155 case FLASH_MAN_INTEL:
159 printf ("Unknown Vendor ");
163 switch (info->flash_id & FLASH_TYPEMASK) {
164 case FLASH_28F256L18T:
165 printf ("FLASH 28F256L18T\n");
168 printf ("Unknown Chip Type\n");
172 printf (" Size: %ld MB in %d Sectors\n",
173 info->size >> 20, info->sector_count);
175 printf (" Sector Start Addresses:");
176 for (i = 0; i < info->sector_count; ++i) {
180 info->start[i], info->protect[i] ? " (RO)" : " ");
187 * The following code cannot be run from FLASH!
189 static ulong flash_get_size (FPW * addr, flash_info_t * info)
193 /* Write auto select command: read Manufacturer ID */
194 addr[0x5555] = (FPW) 0x00AA00AA;
195 addr[0x2AAA] = (FPW) 0x00550055;
196 addr[0x5555] = (FPW) 0x00900090;
203 case (FPW) INTEL_MANUFACT:
204 info->flash_id = FLASH_MAN_INTEL;
208 info->flash_id = FLASH_UNKNOWN;
209 info->sector_count = 0;
211 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
212 return (0); /* no or unknown flash */
216 value = addr[1]; /* device ID */
219 case (FPW) (INTEL_ID_28F256L18T):
220 info->flash_id += FLASH_28F256L18T;
221 info->sector_count = 259;
222 info->size = 0x02000000;
223 break; /* => 32 MB */
226 info->flash_id = FLASH_UNKNOWN;
230 if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
231 printf ("** ERROR: sector count %d > max (%d) **\n",
232 info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
233 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
236 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
242 /* unprotects a sector for write and erase
243 * on some intel parts, this unprotects the entire chip, but it
244 * wont hurt to call this additional times per sector...
246 void flash_unprotect_sectors (FPWV * addr)
248 #define PD_FINTEL_WSMS_READY_MASK 0x0080
250 *addr = (FPW) 0x00500050; /* clear status register */
252 /* this sends the clear lock bit command */
253 *addr = (FPW) 0x00600060;
254 *addr = (FPW) 0x00D000D0;
258 /*-----------------------------------------------------------------------
261 int flash_erase (flash_info_t * info, int s_first, int s_last)
263 int flag, prot, sect;
267 if ((s_first < 0) || (s_first > s_last)) {
268 if (info->flash_id == FLASH_UNKNOWN) {
269 printf ("- missing\n");
271 printf ("- no sectors to erase\n");
276 type = (info->flash_id & FLASH_VENDMASK);
277 if ((type != FLASH_MAN_INTEL)) {
278 printf ("Can't erase unknown flash type %08lx - aborted\n",
284 for (sect = s_first; sect <= s_last; ++sect) {
285 if (info->protect[sect]) {
291 printf ("- Warning: %d protected sectors will not be erased!\n",
297 /* Disable interrupts which might cause a timeout here */
298 flag = disable_interrupts ();
300 /* Start erase on unprotected sectors */
301 for (sect = s_first; sect <= s_last; sect++) {
302 if (info->protect[sect] == 0) { /* not protected */
303 FPWV *addr = (FPWV *) (info->start[sect]);
306 printf ("Erasing sector %2d ... ", sect);
308 flash_unprotect_sectors (addr);
310 /* arm simple, non interrupt dependent timer */
311 start = get_timer(0);
313 *addr = (FPW) 0x00500050;/* clear status register */
314 *addr = (FPW) 0x00200020;/* erase setup */
315 *addr = (FPW) 0x00D000D0;/* erase confirm */
318 *addr) & (FPW) 0x00800080) !=
320 if (get_timer(start) >
321 CONFIG_SYS_FLASH_ERASE_TOUT) {
322 printf ("Timeout\n");
324 *addr = (FPW) 0x00B000B0;
325 /* reset to read mode */
326 *addr = (FPW) 0x00FF00FF;
332 /* clear status register cmd. */
333 *addr = (FPW) 0x00500050;
334 *addr = (FPW) 0x00FF00FF;/* resest to read mode */
341 /*-----------------------------------------------------------------------
342 * Copy memory to flash, returns:
345 * 2 - Flash not erased
346 * 4 - Flash not identified
349 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
353 int count, i, l, rc, port_width;
355 if (info->flash_id == FLASH_UNKNOWN) {
358 /* get lower word aligned address */
359 #ifdef FLASH_PORT_WIDTH16
368 * handle unaligned start bytes
370 if ((l = addr - wp) != 0) {
372 for (i = 0, cp = wp; i < l; ++i, ++cp) {
373 data = (data << 8) | (*(uchar *) cp);
375 for (; i < port_width && cnt > 0; ++i) {
376 data = (data << 8) | *src++;
380 for (; cnt == 0 && i < port_width; ++i, ++cp) {
381 data = (data << 8) | (*(uchar *) cp);
384 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
391 * handle word aligned part
394 while (cnt >= port_width) {
396 for (i = 0; i < port_width; ++i) {
397 data = (data << 8) | *src++;
399 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
404 if (count++ > 0x800) {
415 * handle unaligned tail bytes
418 for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
419 data = (data << 8) | *src++;
422 for (; i < port_width; ++i, ++cp) {
423 data = (data << 8) | (*(uchar *) cp);
426 return (write_data (info, wp, SWAP (data)));
429 /*-----------------------------------------------------------------------
430 * Write a word or halfword to Flash, returns:
433 * 2 - Flash not erased
435 static int write_data (flash_info_t * info, ulong dest, FPW data)
437 FPWV *addr = (FPWV *) dest;
442 /* Check if Flash is (sufficiently) erased */
443 if ((*addr & data) != data) {
444 printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr);
447 flash_unprotect_sectors (addr);
448 /* Disable interrupts which might cause a timeout here */
449 flag = disable_interrupts ();
450 *addr = (FPW) 0x00400040; /* write setup */
453 /* arm simple, non interrupt dependent timer */
454 start = get_timer(0);
456 /* wait while polling the status register */
457 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
458 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
459 *addr = (FPW) 0x00FF00FF; /* restore read mode */
463 *addr = (FPW) 0x00FF00FF; /* restore read mode */
467 void inline spin_wheel (void)
470 static char w[] = "\\/-";
472 printf ("\010%c", w[p]);
473 (++p == 3) ? (p = 0) : 0;