blob: 037a6430dabd7548efa9900fc1da86cfa758e88a [file] [log] [blame]
Wolfgang Denkc570b2f2005-09-26 01:06:33 +02001/*
2 * (C) Copyright 2002
3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
4 * Marius Groeger <mgroeger@sysgo.de>
5 *
6 * (C) Copyright 2005 Rowel Atienza <rowel@diwalabs.com>
7 * Flash driver for armadillo board HT1070
8 *
9 * See file CREDITS for list of people who contributed to this
10 * project.
11 *
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.
16 *
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.
21 *
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,
25 * MA 02111-1307 USA
26 */
27
28#include <common.h>
29
30#define FLASH_BANK_SIZE 0x400000
31
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
35
36#define UNALIGNED_MASK (3)
37#define FL_WORD(addr) (*(volatile unsigned short*)(addr))
38#define FLASH_TIMEOUT 20000000
39
40flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
41
42/*-----------------------------------------------------------------------
43 */
44
45ulong flash_init (void)
46{
47 int i, j;
48 ulong size = 0;
49
50 for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
51 ulong flashbase = 0;
52
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);
58 if (i == 0)
59 flashbase = PHYS_FLASH_1;
60 else
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;
65 }
66 size += flash_info[i].size;
67 }
68
69 /* Protect monitor and environment sectors
70 */
71 flash_protect (FLAG_PROTECT_SET,
72 CFG_FLASH_BASE,
73 CFG_FLASH_BASE + monitor_flash_len - 1,
74 &flash_info[0]);
75
76 flash_protect (FLAG_PROTECT_SET,
77 CFG_ENV_ADDR,
78 CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
79
80 return size;
81}
82
83/*-----------------------------------------------------------------------
84 */
85void flash_print_info (flash_info_t * info)
86{
87 int i;
88
89 switch (info->flash_id & FLASH_VENDMASK) {
90 case (FUJ_MANUFACT & FLASH_VENDMASK):
91 printf ("Fujitsu: ");
92 break;
93 default:
94 printf ("Unknown Vendor ");
95 break;
96 }
97/*
98 switch (info->flash_id & FLASH_TYPEMASK) {
99 case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
100 printf ("28F128J3 (128Mbit)\n");
101 break;
102 default:
103 printf ("Unknown Chip Type\n");
104 goto Done;
105 break;
106 }
107*/
108 printf (" Size: %ld MB in %d Sectors\n",
109 info->size >> 20, info->sector_count);
110
111 printf (" Sector Start Addresses:");
112 for (i = 0; i < info->sector_count; i++) {
113 if ((i % 5) == 0) {
114 printf ("\n ");
115 }
116 printf (" %08lX%s", info->start[i],
117 info->protect[i] ? " (RO)" : " ");
118 }
119 printf ("\n");
120
Wolfgang Denkb8e16a32005-10-06 23:44:55 +0200121/*
122Done: ;
123*/
Wolfgang Denkc570b2f2005-09-26 01:06:33 +0200124}
125
126/*
127 * * Loop until both write state machines complete.
128 * */
129static unsigned short flash_status_wait (unsigned long addr,
130 unsigned short value)
131{
132 unsigned short status;
133 long timeout = FLASH_TIMEOUT;
134
135 while (((status = (FL_WORD (addr))) != value) && timeout > 0) {
136 timeout--;
137 }
138 return status;
139}
140
141/*
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.
145 */
146static int flash_status_full_check (unsigned long addr, unsigned short value1,
147 unsigned short value2)
148{
149 unsigned short status1, status2;
150
151 status1 = flash_status_wait (addr, value1);
152 status2 = flash_status_wait (addr + 2, value2);
153 return (status1 != value1 || status2 != value2) ? -1 : 0;
154}
155
156/*-----------------------------------------------------------------------
157 */
158
159int flash_erase (flash_info_t * info, int s_first, int s_last)
160{
161 int flag, prot, sect;
162 int rc = ERR_OK;
163 unsigned long base;
164 unsigned long addr;
165
166 if ((info->flash_id & FLASH_VENDMASK) !=
167 (FUJ_MANUFACT & FLASH_VENDMASK)) {
168 return ERR_UNKNOWN_FLASH_VENDOR;
169 }
170
171 prot = 0;
172 for (sect = s_first; sect <= s_last; ++sect) {
173 if (info->protect[sect]) {
174 prot++;
175 }
176 }
177 if (prot)
178 return ERR_PROTECTED;
179
180 /*
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.
186 */
187 flag = disable_interrupts ();
188
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 ();
196
197 if (info->protect[sect] == 0) { /* not protected */
198
199 addr = sect * MAIN_SECT_SIZE;
200 addr &= ~(unsigned long) UNALIGNED_MASK; /* word align */
201 base = addr & 0xF0000000;
202
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;
211 }
212 }
213 printf ("\nDone.\n");
214 if (ctrlc ())
215 printf ("User Interrupt!\n");
216
217 /* allow flash to settle - wait 10 ms */
218 udelay_masked (10000);
219
220 if (flag)
221 enable_interrupts ();
222
223 return rc;
224}
225
226
227/*-----------------------------------------------------------------------
228 * Copy memory to flash
229 */
230
231static int write_word (flash_info_t * info, ulong dest, ushort data)
232{
233 int flag;
234 unsigned long base;
235
236 /* Check if Flash is (sufficiently) erased
237 */
238 if ((FL_WORD (dest) & data) != data)
239 return ERR_NOT_ERASED;
240
241 /*if(dest & UNALIGNED_MASK) return ERR_ALIGN; */
242
243 /*
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.
249 */
250 flag = disable_interrupts ();
251
252 /* arm simple, non interrupt dependent timer */
253 reset_timer_masked ();
254
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;
263
264 if (flag)
265 enable_interrupts ();
266
267 return ERR_OK;
268}
269
270/*-----------------------------------------------------------------------
271 * Copy memory to flash.
272 */
273
274int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
275{
276 ulong cp, wp;
277 ushort data;
278 int l;
279 int i, rc;
280
281 wp = (addr & ~1); /* get lower word aligned address */
282 printf ("Writing %d short data to 0x%p from 0x%p.\n ", cnt, wp, src);
283
284 /*
285 * handle unaligned start bytes
286 */
287 if ((l = addr - wp) != 0) {
288 data = 0;
289 for (i = 0, cp = wp; i < l; ++i, ++cp) {
290 data = (data >> 8) | (*(uchar *) cp << 8);
291 }
292 for (; i < 2 && cnt > 0; ++i) {
293 data = (data >> 8) | (*src++ << 8);
294 --cnt;
295 ++cp;
296 }
297 for (; cnt == 0 && i < 2; ++i, ++cp) {
298 data = (data >> 8) | (*(uchar *) cp << 8);
299 }
300
301 if ((rc = write_word (info, wp, data)) != 0) {
302 return (rc);
303 }
304 wp += 2;
305 }
306
307 /*
308 * handle word aligned part
309 */
310 while (cnt >= 2) {
311 data = *((vu_short *) src);
312 if ((rc = write_word (info, wp, data)) != 0) {
313 return (rc);
314 }
315 src += 2;
316 wp += 2;
317 cnt -= 2;
318 }
319
320 if (cnt == 0) {
321 printf ("\nDone.\n");
322 return ERR_OK;
323 }
324
325 /*
326 * handle unaligned tail bytes
327 */
328 data = 0;
329 for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) {
330 data = (data >> 8) | (*src++ << 8);
331 --cnt;
332 }
333 for (; i < 2; ++i, ++cp) {
334 data = (data >> 8) | (*(uchar *) cp << 8);
335 }
336
337 return write_word (info, wp, data);
338}