3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
10 * Wait for completion of each sector erase command issued
12 * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
16 * Modified July 20, 2001
17 * Strip down to support ONLY the AMD29F032B.
18 * Dave Updegraff - Cray, Inc. dave@cray.com
22 #include <asm/ppc4xx.h>
23 #include <asm/processor.h>
25 /* The flash chip we use... */
26 #define AMD_ID_F032B 0x41 /* 29F032B ID 32 Mbit,64 64Kx8 sectors */
27 #define FLASH_AM320B 0x0009
30 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
32 /*-----------------------------------------------------------------------
35 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
36 static int write_word (flash_info_t *info, ulong dest, ulong data);
37 static void flash_get_offsets (ulong base, flash_info_t *info);
41 #define FLASH_WORD_SIZE unsigned char
43 /*-----------------------------------------------------------------------
46 unsigned long flash_init (void)
48 unsigned long size_b0, size_b1;
51 /* Init: no FLASHes known */
52 for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
53 flash_info[i].flash_id = FLASH_UNKNOWN;
56 /* Static FLASH Bank configuration here - FIXME XXX */
58 size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
60 if (flash_info[0].flash_id == FLASH_UNKNOWN) {
61 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
62 size_b0, size_b0<<20);
66 if (CONFIG_SYS_MAX_FLASH_BANKS == 1)
69 flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);
72 /* Monitor protection ON by default */
73 (void)flash_protect(FLAG_PROTECT_SET,
75 FLASH_BASE0_PRELIM+monitor_flash_len-1,
79 flash_info[0].size = size_b0;
82 return (size_b0 + size_b1);
86 /*-----------------------------------------------------------------------
88 static void flash_get_offsets (ulong base, flash_info_t *info)
92 /* set up sector start address table */
93 for (i = 0; i < info->sector_count; i++)
94 info->start[i] = base + (i * 0x00010000);
97 /*-----------------------------------------------------------------------
99 void flash_print_info (flash_info_t *info)
105 volatile unsigned long *flash;
107 if (info->flash_id == FLASH_UNKNOWN) {
108 printf ("missing or unknown FLASH type\n");
112 switch (info->flash_id & FLASH_VENDMASK) {
113 case FLASH_MAN_AMD: printf ("AMD "); break;
114 default: printf ("Unknown Vendor "); break;
117 switch (info->flash_id & FLASH_TYPEMASK) {
118 case FLASH_AM320B:printf ("AM29F032B (32 Mbit 64x64KB uniform sectors)\n");
120 default: printf ("Unknown Chip Type\n");
124 printf (" Size: %ld KB in %d Sectors\n",
125 info->size >> 10, info->sector_count);
127 printf (" Sector Start Addresses:");
128 for (i=0; i<info->sector_count; ++i) {
130 * Check if whole sector is erased
132 if (i != (info->sector_count-1))
133 size = info->start[i+1] - info->start[i];
135 size = info->start[0] + info->size - info->start[i];
137 flash = (volatile unsigned long *)info->start[i];
138 size = size >> 2; /* divide by 4 for longword access */
139 for (k=0; k<size; k++)
141 if (*flash++ != 0xffffffff)
151 printf (" %08lX%s%s",
154 info->protect[i] ? "RO " : " "
160 /*-----------------------------------------------------------------------
164 /*-----------------------------------------------------------------------
168 * The following code cannot be run from FLASH!
170 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
173 FLASH_WORD_SIZE value;
174 ulong base = (ulong)addr;
175 volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;
177 /* Write auto select command: read Manufacturer ID */
178 addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
179 addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
180 addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090;
185 case (FLASH_WORD_SIZE)AMD_MANUFACT:
186 info->flash_id = FLASH_MAN_AMD;
189 info->flash_id = FLASH_UNKNOWN;
190 info->sector_count = 0;
192 return (0); /* no or unknown flash */
195 value = addr2[1]; /* device ID */
198 case (FLASH_WORD_SIZE)AMD_ID_F032B:
199 info->flash_id += FLASH_AM320B;
200 info->sector_count = 64;
201 info->size = 0x0400000; /* => 4 MB */
204 info->flash_id = FLASH_UNKNOWN;
205 return (0); /* => no or unknown flash */
209 /* set up sector start address table */
210 for (i = 0; i < info->sector_count; i++)
211 info->start[i] = base + (i * 0x00010000);
213 /* check for protected sectors */
214 for (i = 0; i < info->sector_count; i++) {
215 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
216 /* D0 = 1 if protected */
217 addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
218 info->protect[i] = addr2[2] & 1;
222 * Prevent writes to uninitialized FLASH.
224 if (info->flash_id != FLASH_UNKNOWN) {
225 addr2 = (FLASH_WORD_SIZE *)info->start[0];
226 *addr2 = (FLASH_WORD_SIZE)0x00F000F0; /* reset bank */
232 int wait_for_DQ7(flash_info_t *info, int sect)
234 ulong start, now, last;
235 volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);
237 start = get_timer (0);
239 while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
240 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
241 printf ("Timeout\n");
244 /* show that we're waiting */
245 if ((now - last) > 1000) { /* every second */
253 /*-----------------------------------------------------------------------
256 int flash_erase (flash_info_t *info, int s_first, int s_last)
258 volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
259 volatile FLASH_WORD_SIZE *addr2;
260 int flag, prot, sect;
262 if ((s_first < 0) || (s_first > s_last)) {
263 if (info->flash_id == FLASH_UNKNOWN) {
264 printf ("- missing\n");
266 printf ("- no sectors to erase\n");
271 if (info->flash_id == FLASH_UNKNOWN) {
272 printf ("Can't erase unknown flash type - aborted\n");
277 for (sect=s_first; sect<=s_last; ++sect) {
278 if (info->protect[sect]) {
284 printf ("- Warning: %d protected sectors will not be erased!\n",
290 /* Disable interrupts which might cause a timeout here */
291 flag = disable_interrupts();
293 /* Start erase on unprotected sectors */
294 for (sect = s_first; sect<=s_last; sect++) {
295 if (info->protect[sect] == 0) { /* not protected */
296 addr2 = (FLASH_WORD_SIZE *)(info->start[sect]);
297 printf("Erasing sector %p\n", addr2);
299 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
300 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
301 addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
302 addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
303 addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
304 addr2[0] = (FLASH_WORD_SIZE)0x00300030; /* sector erase */
306 * Wait for each sector to complete, it's more
307 * reliable. According to AMD Spec, you must
308 * issue all erase commands within a specified
309 * timeout. This has been seen to fail, especially
310 * if printf()s are included (for debug)!!
312 wait_for_DQ7(info, sect);
316 /* re-enable interrupts if necessary */
320 /* wait at least 80us - let's wait 1 ms */
323 /* reset to read mode */
324 addr = (FLASH_WORD_SIZE *)info->start[0];
325 addr[0] = (FLASH_WORD_SIZE)0x00F000F0; /* reset bank */
331 /*-----------------------------------------------------------------------
332 * Copy memory to flash, returns:
335 * 2 - Flash not erased
338 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
343 wp = (addr & ~3); /* get lower word aligned address */
346 * handle unaligned start bytes
348 if ((l = addr - wp) != 0) {
350 for (i=0, cp=wp; i<l; ++i, ++cp) {
351 data = (data << 8) | (*(uchar *)cp);
353 for (; i<4 && cnt>0; ++i) {
354 data = (data << 8) | *src++;
358 for (; cnt==0 && i<4; ++i, ++cp) {
359 data = (data << 8) | (*(uchar *)cp);
362 if ((rc = write_word(info, wp, data)) != 0) {
369 * handle word aligned part
373 for (i=0; i<4; ++i) {
374 data = (data << 8) | *src++;
376 if ((rc = write_word(info, wp, data)) != 0) {
388 * handle unaligned tail bytes
391 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
392 data = (data << 8) | *src++;
395 for (; i<4; ++i, ++cp) {
396 data = (data << 8) | (*(uchar *)cp);
399 return (write_word(info, wp, data));
402 /*-----------------------------------------------------------------------
403 * Write a word to Flash, returns:
406 * 2 - Flash not erased
408 static int write_word (flash_info_t *info, ulong dest, ulong data)
410 volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)(info->start[0]);
411 volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *)dest;
412 volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data;
417 /* Check if Flash is (sufficiently) erased */
418 if ((*((volatile FLASH_WORD_SIZE *)dest) &
419 (FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) {
422 /* Disable interrupts which might cause a timeout here */
423 flag = disable_interrupts();
425 for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++)
427 addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
428 addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
429 addr2[ADDR0] = (FLASH_WORD_SIZE)0x00A000A0;
433 /* re-enable interrupts if necessary */
437 /* data polling for D7 */
438 start = get_timer (0);
439 while ((dest2[i] & (FLASH_WORD_SIZE)0x00800080) !=
440 (data2[i] & (FLASH_WORD_SIZE)0x00800080)) {
441 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
450 /*-----------------------------------------------------------------------