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[CONFIG_SYS_MAX_FLASH_BANKS];
42 /*-----------------------------------------------------------------------
45 ulong flash_init (void)
50 for (i = 0; i < CONFIG_SYS_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 = CONFIG_SYS_MAX_FLASH_SECT;
57 memset (flash_info[i].protect, 0, CONFIG_SYS_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,
72 CONFIG_SYS_FLASH_BASE,
73 CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
76 flash_protect (FLAG_PROTECT_SET,
78 CONFIG_ENV_ADDR + CONFIG_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;
167 if ((info->flash_id & FLASH_VENDMASK) !=
168 (FUJ_MANUFACT & FLASH_VENDMASK)) {
169 return ERR_UNKNOWN_FLASH_VENDOR;
173 for (sect = s_first; sect <= s_last; ++sect) {
174 if (info->protect[sect]) {
179 return ERR_PROTECTED;
182 * Disable interrupts which might cause a timeout
183 * here. Remember that our exception vectors are
184 * at address 0 in the flash, and we don't want a
185 * (ticker) exception to happen while the flash
186 * chip is in programming mode.
188 flag = disable_interrupts ();
190 printf ("Erasing %d sectors starting at sector %2d.\n"
191 "This make take some time ... ",
192 s_last - s_first, sect);
193 /* Start erase on unprotected sectors */
194 for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
195 /* ARM simple, non interrupt dependent timer */
196 start = get_timer(0);
198 if (info->protect[sect] == 0) { /* not protected */
200 addr = sect * MAIN_SECT_SIZE;
201 addr &= ~(unsigned long) UNALIGNED_MASK; /* word align */
202 base = addr & 0xF0000000;
204 FL_WORD (base + (0x555 << 1)) = 0xAA;
205 FL_WORD (base + (0x2AA << 1)) = 0x55;
206 FL_WORD (base + (0x555 << 1)) = 0x80;
207 FL_WORD (base + (0x555 << 1)) = 0xAA;
208 FL_WORD (base + (0x2AA << 1)) = 0x55;
209 FL_WORD (addr) = 0x30;
210 if (flash_status_full_check (addr, 0xFFFF, 0xFFFF))
211 return ERR_PROTECTED;
214 printf ("\nDone.\n");
216 printf ("User Interrupt!\n");
218 /* allow flash to settle - wait 10 ms */
219 udelay_masked (10000);
222 enable_interrupts ();
228 /*-----------------------------------------------------------------------
229 * Copy memory to flash
232 static int write_word (flash_info_t * info, ulong dest, ushort data)
238 /* Check if Flash is (sufficiently) erased
240 if ((FL_WORD (dest) & data) != data)
241 return ERR_NOT_ERASED;
243 /*if(dest & UNALIGNED_MASK) return ERR_ALIGN; */
246 * Disable interrupts which might cause a timeout
247 * here. Remember that our exception vectors are
248 * at address 0 in the flash, and we don't want a
249 * (ticker) exception to happen while the flash
250 * chip is in programming mode.
252 flag = disable_interrupts ();
254 /* arm simple, non interrupt dependent timer */
255 start = get_timer(0);
257 base = dest & 0xF0000000;
258 FL_WORD (base + (0x555 << 1)) = 0xAA;
259 FL_WORD (base + (0x2AA << 1)) = 0x55;
260 FL_WORD (base + (0x555 << 1)) = 0xA0;
261 FL_WORD (dest) = data;
262 /*printf("writing 0x%p = 0x%x\n",dest,data); */
263 if (flash_status_wait (dest, data) != data)
264 return ERR_PROG_ERROR;
267 enable_interrupts ();
272 /*-----------------------------------------------------------------------
273 * Copy memory to flash.
276 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
283 wp = (addr & ~1); /* get lower word aligned address */
284 printf ("Writing %lu short data to 0x%lx from 0x%p.\n ", cnt, wp, src);
287 * handle unaligned start bytes
289 if ((l = addr - wp) != 0) {
291 for (i = 0, cp = wp; i < l; ++i, ++cp) {
292 data = (data >> 8) | (*(uchar *) cp << 8);
294 for (; i < 2 && cnt > 0; ++i) {
295 data = (data >> 8) | (*src++ << 8);
299 for (; cnt == 0 && i < 2; ++i, ++cp) {
300 data = (data >> 8) | (*(uchar *) cp << 8);
303 if ((rc = write_word (info, wp, data)) != 0) {
310 * handle word aligned part
313 data = *((vu_short *) src);
314 if ((rc = write_word (info, wp, data)) != 0) {
323 printf ("\nDone.\n");
328 * handle unaligned tail bytes
331 for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) {
332 data = (data >> 8) | (*src++ << 8);
335 for (; i < 2; ++i, ++cp) {
336 data = (data >> 8) | (*(uchar *) cp << 8);
339 return write_word (info, wp, data);