3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
4 * Marius Groeger <mgroeger@sysgo.de>
6 * (C) Copyright 2005 Rowel Atienza <rowel@diwalabs.com>
7 * Flash driver for armadillo board HT1070
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 #define FLASH_BANK_SIZE 0x400000
32 /*value used by hermit is 0x200*/
33 /*document says sector size is either 64k in low mem reg and 8k in high mem reg*/
34 #define MAIN_SECT_SIZE 0x10000
36 #define UNALIGNED_MASK (3)
37 #define FL_WORD(addr) (*(volatile unsigned short*)(addr))
38 #define FLASH_TIMEOUT 20000000
40 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
42 /*-----------------------------------------------------------------------
45 ulong flash_init (void)
50 for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
53 flash_info[i].flash_id = (FUJ_MANUFACT & FLASH_VENDMASK);
54 /*(INTEL_ID_28F128J3 & FLASH_TYPEMASK); */
55 flash_info[i].size = FLASH_BANK_SIZE;
56 flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
57 memset (flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
59 flashbase = PHYS_FLASH_1;
61 panic ("configured too many flash banks!\n");
62 for (j = 0; j < flash_info[i].sector_count; j++) {
63 flash_info[i].start[j] =
64 flashbase + j * MAIN_SECT_SIZE;
66 size += flash_info[i].size;
69 /* Protect monitor and environment sectors
71 flash_protect (FLAG_PROTECT_SET,
73 CFG_FLASH_BASE + monitor_flash_len - 1,
76 flash_protect (FLAG_PROTECT_SET,
78 CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
83 /*-----------------------------------------------------------------------
85 void flash_print_info (flash_info_t * info)
89 switch (info->flash_id & FLASH_VENDMASK) {
90 case (FUJ_MANUFACT & FLASH_VENDMASK):
94 printf ("Unknown Vendor ");
98 switch (info->flash_id & FLASH_TYPEMASK) {
99 case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
100 printf ("28F128J3 (128Mbit)\n");
103 printf ("Unknown Chip Type\n");
108 printf (" Size: %ld MB in %d Sectors\n",
109 info->size >> 20, info->sector_count);
111 printf (" Sector Start Addresses:");
112 for (i = 0; i < info->sector_count; i++) {
116 printf (" %08lX%s", info->start[i],
117 info->protect[i] ? " (RO)" : " ");
127 * * Loop until both write state machines complete.
129 static unsigned short flash_status_wait (unsigned long addr,
130 unsigned short value)
132 unsigned short status;
133 long timeout = FLASH_TIMEOUT;
135 while (((status = (FL_WORD (addr))) != value) && timeout > 0) {
142 * Loop until the Write State machine is ready, then do a full error
143 * check. Clear status and leave the flash in Read Array mode; return
144 * 0 for no error, -1 for error.
146 static int flash_status_full_check (unsigned long addr, unsigned short value1,
147 unsigned short value2)
149 unsigned short status1, status2;
151 status1 = flash_status_wait (addr, value1);
152 status2 = flash_status_wait (addr + 2, value2);
153 return (status1 != value1 || status2 != value2) ? -1 : 0;
156 /*-----------------------------------------------------------------------
159 int flash_erase (flash_info_t * info, int s_first, int s_last)
161 int flag, prot, sect;
166 if ((info->flash_id & FLASH_VENDMASK) !=
167 (FUJ_MANUFACT & FLASH_VENDMASK)) {
168 return ERR_UNKNOWN_FLASH_VENDOR;
172 for (sect = s_first; sect <= s_last; ++sect) {
173 if (info->protect[sect]) {
178 return ERR_PROTECTED;
181 * Disable interrupts which might cause a timeout
182 * here. Remember that our exception vectors are
183 * at address 0 in the flash, and we don't want a
184 * (ticker) exception to happen while the flash
185 * chip is in programming mode.
187 flag = disable_interrupts ();
189 printf ("Erasing %d sectors starting at sector %2d.\n"
190 "This make take some time ... ",
191 s_last - s_first, sect);
192 /* Start erase on unprotected sectors */
193 for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
194 /* ARM simple, non interrupt dependent timer */
195 reset_timer_masked ();
197 if (info->protect[sect] == 0) { /* not protected */
199 addr = sect * MAIN_SECT_SIZE;
200 addr &= ~(unsigned long) UNALIGNED_MASK; /* word align */
201 base = addr & 0xF0000000;
203 FL_WORD (base + (0x555 << 1)) = 0xAA;
204 FL_WORD (base + (0x2AA << 1)) = 0x55;
205 FL_WORD (base + (0x555 << 1)) = 0x80;
206 FL_WORD (base + (0x555 << 1)) = 0xAA;
207 FL_WORD (base + (0x2AA << 1)) = 0x55;
208 FL_WORD (addr) = 0x30;
209 if (flash_status_full_check (addr, 0xFFFF, 0xFFFF))
210 return ERR_PROTECTED;
213 printf ("\nDone.\n");
215 printf ("User Interrupt!\n");
217 /* allow flash to settle - wait 10 ms */
218 udelay_masked (10000);
221 enable_interrupts ();
227 /*-----------------------------------------------------------------------
228 * Copy memory to flash
231 static int write_word (flash_info_t * info, ulong dest, ushort data)
236 /* Check if Flash is (sufficiently) erased
238 if ((FL_WORD (dest) & data) != data)
239 return ERR_NOT_ERASED;
241 /*if(dest & UNALIGNED_MASK) return ERR_ALIGN; */
244 * Disable interrupts which might cause a timeout
245 * here. Remember that our exception vectors are
246 * at address 0 in the flash, and we don't want a
247 * (ticker) exception to happen while the flash
248 * chip is in programming mode.
250 flag = disable_interrupts ();
252 /* arm simple, non interrupt dependent timer */
253 reset_timer_masked ();
255 base = dest & 0xF0000000;
256 FL_WORD (base + (0x555 << 1)) = 0xAA;
257 FL_WORD (base + (0x2AA << 1)) = 0x55;
258 FL_WORD (base + (0x555 << 1)) = 0xA0;
259 FL_WORD (dest) = data;
260 /*printf("writing 0x%p = 0x%x\n",dest,data); */
261 if (flash_status_wait (dest, data) != data)
262 return ERR_PROG_ERROR;
265 enable_interrupts ();
270 /*-----------------------------------------------------------------------
271 * Copy memory to flash.
274 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
281 wp = (addr & ~1); /* get lower word aligned address */
282 printf ("Writing %lu short data to 0x%lx from 0x%p.\n ", cnt, wp, src);
285 * handle unaligned start bytes
287 if ((l = addr - wp) != 0) {
289 for (i = 0, cp = wp; i < l; ++i, ++cp) {
290 data = (data >> 8) | (*(uchar *) cp << 8);
292 for (; i < 2 && cnt > 0; ++i) {
293 data = (data >> 8) | (*src++ << 8);
297 for (; cnt == 0 && i < 2; ++i, ++cp) {
298 data = (data >> 8) | (*(uchar *) cp << 8);
301 if ((rc = write_word (info, wp, data)) != 0) {
308 * handle word aligned part
311 data = *((vu_short *) src);
312 if ((rc = write_word (info, wp, data)) != 0) {
321 printf ("\nDone.\n");
326 * handle unaligned tail bytes
329 for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) {
330 data = (data >> 8) | (*src++ << 8);
333 for (; i < 2; ++i, ++cp) {
334 data = (data >> 8) | (*(uchar *) cp << 8);
337 return write_word (info, wp, data);