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wdenk281e00a2004-08-01 22:48:16 +00001/*
2 * Copyright (C) 2003 ETC s.r.o.
3 *
4 * This code was inspired by Marius Groeger and Kyle Harris code
5 * available in other board ports for U-Boot
6 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02007 * SPDX-License-Identifier: GPL-2.0+
wdenk281e00a2004-08-01 22:48:16 +00008 *
9 * Written by Peter Figuli <peposh@etc.sk>, 2003.
wdenk281e00a2004-08-01 22:48:16 +000010 */
11
12#include <common.h>
13#include "intel.h"
14
15
16/*
17 * This code should handle CFI FLASH memory device. This code is very
18 * minimalistic approach without many essential error handling code as well.
19 * Because U-Boot actually is missing smart handling of FLASH device,
20 * we just set flash_id to anything else to FLASH_UNKNOW, so common code
21 * can call us without any restrictions.
22 * TODO: Add CFI Query, to be able to determine FLASH device.
23 * TODO: Add error handling code
24 * NOTE: This code was tested with BUS_WIDTH 4 and ITERLEAVE 2 only, but
25 * hopefully may work with other configurations.
26 */
27
28#if ( SCB9328_FLASH_BUS_WIDTH == 1 )
29# define FLASH_BUS vu_char
Jean-Christophe PLAGNIOL-VILLARDdb695b72008-03-09 10:44:01 +010030# define FLASH_BUS_RET u_char
wdenk281e00a2004-08-01 22:48:16 +000031# if ( SCB9328_FLASH_INTERLEAVE == 1 )
32# define FLASH_CMD( x ) x
33# else
34# error "With 8bit bus only one chip is allowed"
35# endif
36
37
38#elif ( SCB9328_FLASH_BUS_WIDTH == 2 )
39# define FLASH_BUS vu_short
Jean-Christophe PLAGNIOL-VILLARDdb695b72008-03-09 10:44:01 +010040# define FLASH_BUS_RET u_short
wdenk281e00a2004-08-01 22:48:16 +000041# if ( SCB9328_FLASH_INTERLEAVE == 1 )
42# define FLASH_CMD( x ) x
43# elif ( SCB9328_FLASH_INTERLEAVE == 2 )
44# define FLASH_CMD( x ) (( x << 8 )| x )
45# else
46# error "With 16bit bus only 1 or 2 chip(s) are allowed"
47# endif
48
49
50#elif ( SCB9328_FLASH_BUS_WIDTH == 4 )
51# define FLASH_BUS vu_long
Jean-Christophe PLAGNIOL-VILLARDdb695b72008-03-09 10:44:01 +010052# define FLASH_BUS_RET u_long
wdenk281e00a2004-08-01 22:48:16 +000053# if ( SCB9328_FLASH_INTERLEAVE == 1 )
54# define FLASH_CMD( x ) x
55# elif ( SCB9328_FLASH_INTERLEAVE == 2 )
56# define FLASH_CMD( x ) (( x << 16 )| x )
57# elif ( SCB9328_FLASH_INTERLEAVE == 4 )
58# define FLASH_CMD( x ) (( x << 24 )|( x << 16 ) ( x << 8 )| x )
59# else
60# error "With 32bit bus only 1,2 or 4 chip(s) are allowed"
61# endif
62
63#else
64# error "Flash bus width might be 1,2,4 for 8,16,32 bit configuration"
65#endif
66
67
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020068flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
wdenk281e00a2004-08-01 22:48:16 +000069
Jean-Christophe PLAGNIOL-VILLARDdb695b72008-03-09 10:44:01 +010070static FLASH_BUS_RET flash_status_reg (void)
wdenk281e00a2004-08-01 22:48:16 +000071{
72
73 FLASH_BUS *addr = (FLASH_BUS *) 0;
74
75 *addr = FLASH_CMD (CFI_INTEL_CMD_READ_STATUS_REGISTER);
76
77 return *addr;
78}
79
80static int flash_ready (ulong timeout)
81{
82 int ok = 1;
Graeme Russa60d1e52011-07-15 23:31:37 +000083 ulong start;
wdenk281e00a2004-08-01 22:48:16 +000084
Graeme Russa60d1e52011-07-15 23:31:37 +000085 start = get_timer(0);
wdenk281e00a2004-08-01 22:48:16 +000086 while ((flash_status_reg () & FLASH_CMD (CFI_INTEL_SR_READY)) !=
87 FLASH_CMD (CFI_INTEL_SR_READY)) {
Graeme Russa60d1e52011-07-15 23:31:37 +000088 if (get_timer(start) > timeout && timeout != 0) {
wdenk281e00a2004-08-01 22:48:16 +000089 ok = 0;
90 break;
91 }
92 }
93 return ok;
94}
95
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020096#if ( CONFIG_SYS_MAX_FLASH_BANKS != 1 )
wdenk281e00a2004-08-01 22:48:16 +000097# error "SCB9328 platform has only one flash bank!"
98#endif
99
100
101ulong flash_init (void)
102{
103 int i;
104 unsigned long address = SCB9328_FLASH_BASE;
105
106 flash_info[0].size = SCB9328_FLASH_BANK_SIZE;
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200107 flash_info[0].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
wdenk281e00a2004-08-01 22:48:16 +0000108 flash_info[0].flash_id = INTEL_MANUFACT;
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200109 memset (flash_info[0].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
wdenk281e00a2004-08-01 22:48:16 +0000110
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200111 for (i = 0; i < CONFIG_SYS_MAX_FLASH_SECT; i++) {
wdenk281e00a2004-08-01 22:48:16 +0000112 flash_info[0].start[i] = address;
113#ifdef SCB9328_FLASH_UNLOCK
114 /* Some devices are hw locked after start. */
115 *((FLASH_BUS *) address) = FLASH_CMD (CFI_INTEL_CMD_LOCK_SETUP);
116 *((FLASH_BUS *) address) = FLASH_CMD (CFI_INTEL_CMD_UNLOCK_BLOCK);
117 flash_ready (0);
118 *((FLASH_BUS *) address) = FLASH_CMD (CFI_INTEL_CMD_READ_ARRAY);
119#endif
120 address += SCB9328_FLASH_SECT_SIZE;
121 }
122
123 flash_protect (FLAG_PROTECT_SET,
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200124 CONFIG_SYS_FLASH_BASE,
125 CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
wdenk281e00a2004-08-01 22:48:16 +0000126 &flash_info[0]);
127
128 flash_protect (FLAG_PROTECT_SET,
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200129 CONFIG_ENV_ADDR,
130 CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
wdenk281e00a2004-08-01 22:48:16 +0000131
132 return SCB9328_FLASH_BANK_SIZE;
133}
134
135void flash_print_info (flash_info_t * info)
136{
137 int i;
138
139 printf (" Intel vendor\n");
140 printf (" Size: %ld MB in %d Sectors\n",
141 info->size >> 20, info->sector_count);
142
143 printf (" Sector Start Addresses:");
144 for (i = 0; i < info->sector_count; i++) {
145 if (!(i % 5)) {
146 printf ("\n");
147 }
148
149 printf (" %08lX%s", info->start[i],
150 info->protect[i] ? " (RO)" : " ");
151 }
152 printf ("\n");
153}
154
155
156int flash_erase (flash_info_t * info, int s_first, int s_last)
157{
158 int flag, non_protected = 0, sector;
159 int rc = ERR_OK;
160
161 FLASH_BUS *address;
162
163 for (sector = s_first; sector <= s_last; sector++) {
164 if (!info->protect[sector]) {
165 non_protected++;
166 }
167 }
168
169 if (!non_protected) {
170 return ERR_PROTECTED;
171 }
172
173 /*
174 * Disable interrupts which might cause a timeout
175 * here. Remember that our exception vectors are
176 * at address 0 in the flash, and we don't want a
177 * (ticker) exception to happen while the flash
178 * chip is in programming mode.
179 */
180 flag = disable_interrupts ();
181
182
183 /* Start erase on unprotected sectors */
184 for (sector = s_first; sector <= s_last && !ctrlc (); sector++) {
185 if (info->protect[sector]) {
186 printf ("Protected sector %2d skipping...\n", sector);
187 continue;
188 } else {
189 printf ("Erasing sector %2d ... ", sector);
190 }
191
192 address = (FLASH_BUS *) (info->start[sector]);
193
194 *address = FLASH_CMD (CFI_INTEL_CMD_BLOCK_ERASE);
195 *address = FLASH_CMD (CFI_INTEL_CMD_CONFIRM);
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200196 if (flash_ready (CONFIG_SYS_FLASH_ERASE_TOUT)) {
wdenk281e00a2004-08-01 22:48:16 +0000197 *address = FLASH_CMD (CFI_INTEL_CMD_CLEAR_STATUS_REGISTER);
198 printf ("ok.\n");
199 } else {
200 *address = FLASH_CMD (CFI_INTEL_CMD_SUSPEND);
201 rc = ERR_TIMOUT;
202 printf ("timeout! Aborting...\n");
203 break;
204 }
205 *address = FLASH_CMD (CFI_INTEL_CMD_READ_ARRAY);
206 }
207 if (ctrlc ())
208 printf ("User Interrupt!\n");
209
210 /* allow flash to settle - wait 10 ms */
211 udelay_masked (10000);
212 if (flag) {
213 enable_interrupts ();
214 }
215
216 return rc;
217}
218
219static int write_data (flash_info_t * info, ulong dest, FLASH_BUS data)
220{
221 FLASH_BUS *address = (FLASH_BUS *) dest;
222 int rc = ERR_OK;
223 int flag;
224
225 /* Check if Flash is (sufficiently) erased */
226 if ((*address & data) != data) {
227 return ERR_NOT_ERASED;
228 }
229
230 /*
231 * Disable interrupts which might cause a timeout
232 * here. Remember that our exception vectors are
233 * at address 0 in the flash, and we don't want a
234 * (ticker) exception to happen while the flash
235 * chip is in programming mode.
236 */
237
238 flag = disable_interrupts ();
239
240 *address = FLASH_CMD (CFI_INTEL_CMD_CLEAR_STATUS_REGISTER);
241 *address = FLASH_CMD (CFI_INTEL_CMD_PROGRAM1);
242 *address = data;
243
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200244 if (!flash_ready (CONFIG_SYS_FLASH_WRITE_TOUT)) {
wdenk281e00a2004-08-01 22:48:16 +0000245 *address = FLASH_CMD (CFI_INTEL_CMD_SUSPEND);
246 rc = ERR_TIMOUT;
247 printf ("timeout! Aborting...\n");
248 }
249
250 *address = FLASH_CMD (CFI_INTEL_CMD_READ_ARRAY);
251 if (flag) {
252 enable_interrupts ();
253 }
254
255 return rc;
256}
257
258int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
259{
260 ulong read_addr, write_addr;
261 FLASH_BUS data;
262 int i, result = ERR_OK;
263
264
265 read_addr = addr & ~(sizeof (FLASH_BUS) - 1);
266 write_addr = read_addr;
267 if (read_addr != addr) {
268 data = 0;
269 for (i = 0; i < sizeof (FLASH_BUS); i++) {
270 if (read_addr < addr || cnt == 0) {
271 data |= *((uchar *) read_addr) << i * 8;
272 } else {
273 data |= (*src++) << i * 8;
274 cnt--;
275 }
276 read_addr++;
277 }
278 if ((result = write_data (info, write_addr, data)) != ERR_OK) {
279 return result;
280 }
281 write_addr += sizeof (FLASH_BUS);
282 }
283 for (; cnt >= sizeof (FLASH_BUS); cnt -= sizeof (FLASH_BUS)) {
284 if ((result = write_data (info, write_addr,
285 *((FLASH_BUS *) src))) != ERR_OK) {
286 return result;
287 }
288 write_addr += sizeof (FLASH_BUS);
289 src += sizeof (FLASH_BUS);
290 }
291 if (cnt > 0) {
292 read_addr = write_addr;
293 data = 0;
294 for (i = 0; i < sizeof (FLASH_BUS); i++) {
295 if (cnt > 0) {
296 data |= (*src++) << i * 8;
297 cnt--;
298 } else {
299 data |= *((uchar *) read_addr) << i * 8;
300 }
301 read_addr++;
302 }
303 if ((result = write_data (info, write_addr, data)) != 0) {
304 return result;
305 }
306 }
307 return ERR_OK;
308}