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wdenk13a56952004-06-09 14:58:14 +00001/*
Wolfgang Denkea882ba2010-06-20 23:33:59 +02002 * (C) Copyright 2000-2010
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
Stuart Woodcc49cad2008-05-30 16:05:28 -04005 * (C) Copyright 2008
6 * Stuart Wood, Lab X Technologies <stuart.wood@labxtechnologies.com>
7 *
wdenk13a56952004-06-09 14:58:14 +00008 * (C) Copyright 2004
9 * Jian Zhang, Texas Instruments, jzhang@ti.com.
wdenk13a56952004-06-09 14:58:14 +000010 *
11 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
12 * Andreas Heppel <aheppel@sysgo.de>
Wolfgang Denkea882ba2010-06-20 23:33:59 +020013 *
Wolfgang Denk3765b3e2013-10-07 13:07:26 +020014 * SPDX-License-Identifier: GPL-2.0+
wdenk13a56952004-06-09 14:58:14 +000015 */
16
wdenk13a56952004-06-09 14:58:14 +000017#include <common.h>
wdenk13a56952004-06-09 14:58:14 +000018#include <command.h>
19#include <environment.h>
20#include <linux/stddef.h>
Markus Klotzbuechere443c942006-03-20 18:02:44 +010021#include <malloc.h>
Bartlomiej Siekaaddb2e12006-03-05 18:57:33 +010022#include <nand.h>
Wolfgang Denkea882ba2010-06-20 23:33:59 +020023#include <search.h>
24#include <errno.h>
wdenk13a56952004-06-09 14:58:14 +000025
Mike Frysingerbdab39d2009-01-28 19:08:14 -050026#if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_NAND)
wdenk13a56952004-06-09 14:58:14 +000027#define CMD_SAVEENV
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020028#elif defined(CONFIG_ENV_OFFSET_REDUND)
Igor Grinbergde152b92011-11-07 01:14:10 +000029#error CONFIG_ENV_OFFSET_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_NAND
wdenk13a56952004-06-09 14:58:14 +000030#endif
31
Igor Grinbergde152b92011-11-07 01:14:10 +000032#if defined(CONFIG_ENV_SIZE_REDUND) && \
33 (CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020034#error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
wdenk13a56952004-06-09 14:58:14 +000035#endif
36
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020037#ifndef CONFIG_ENV_RANGE
38#define CONFIG_ENV_RANGE CONFIG_ENV_SIZE
Stuart Woodcc49cad2008-05-30 16:05:28 -040039#endif
40
Wolfgang Denkea882ba2010-06-20 23:33:59 +020041char *env_name_spec = "NAND";
wdenk13a56952004-06-09 14:58:14 +000042
Guennadi Liakhovetskib74ab732009-05-18 16:07:22 +020043#if defined(ENV_IS_EMBEDDED)
Igor Grinberg994bc672011-11-17 06:07:23 +000044env_t *env_ptr = &environment;
Guennadi Liakhovetskib74ab732009-05-18 16:07:22 +020045#elif defined(CONFIG_NAND_ENV_DST)
46env_t *env_ptr = (env_t *)CONFIG_NAND_ENV_DST;
wdenk13a56952004-06-09 14:58:14 +000047#else /* ! ENV_IS_EMBEDDED */
Igor Grinbergde152b92011-11-07 01:14:10 +000048env_t *env_ptr;
wdenk13a56952004-06-09 14:58:14 +000049#endif /* ENV_IS_EMBEDDED */
50
Wolfgang Denkd87080b2006-03-31 18:32:53 +020051DECLARE_GLOBAL_DATA_PTR;
wdenk13a56952004-06-09 14:58:14 +000052
Wolfgang Denkea882ba2010-06-20 23:33:59 +020053/*
54 * This is called before nand_init() so we can't read NAND to
55 * validate env data.
56 *
57 * Mark it OK for now. env_relocate() in env_common.c will call our
58 * relocate function which does the real validation.
Stefan Roesed12ae802006-09-12 20:19:10 +020059 *
60 * When using a NAND boot image (like sequoia_nand), the environment
Wolfgang Denkea882ba2010-06-20 23:33:59 +020061 * can be embedded or attached to the U-Boot image in NAND flash.
62 * This way the SPL loads not only the U-Boot image from NAND but
63 * also the environment.
wdenk13a56952004-06-09 14:58:14 +000064 */
65int env_init(void)
66{
Guennadi Liakhovetskib74ab732009-05-18 16:07:22 +020067#if defined(ENV_IS_EMBEDDED) || defined(CONFIG_NAND_ENV_DST)
Stefan Roesed12ae802006-09-12 20:19:10 +020068 int crc1_ok = 0, crc2_ok = 0;
Guennadi Liakhovetskib74ab732009-05-18 16:07:22 +020069 env_t *tmp_env1;
70
71#ifdef CONFIG_ENV_OFFSET_REDUND
72 env_t *tmp_env2;
73
74 tmp_env2 = (env_t *)((ulong)env_ptr + CONFIG_ENV_SIZE);
Igor Grinbergde152b92011-11-07 01:14:10 +000075 crc2_ok = crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc;
Guennadi Liakhovetskib74ab732009-05-18 16:07:22 +020076#endif
Stefan Roesed12ae802006-09-12 20:19:10 +020077 tmp_env1 = env_ptr;
Igor Grinbergde152b92011-11-07 01:14:10 +000078 crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc;
Stefan Roesed12ae802006-09-12 20:19:10 +020079
Guennadi Liakhovetskib74ab732009-05-18 16:07:22 +020080 if (!crc1_ok && !crc2_ok) {
Igor Grinbergde152b92011-11-07 01:14:10 +000081 gd->env_addr = 0;
82 gd->env_valid = 0;
Guennadi Liakhovetskib74ab732009-05-18 16:07:22 +020083
84 return 0;
85 } else if (crc1_ok && !crc2_ok) {
Stefan Roesed12ae802006-09-12 20:19:10 +020086 gd->env_valid = 1;
Guennadi Liakhovetskib74ab732009-05-18 16:07:22 +020087 }
88#ifdef CONFIG_ENV_OFFSET_REDUND
89 else if (!crc1_ok && crc2_ok) {
Stefan Roesed12ae802006-09-12 20:19:10 +020090 gd->env_valid = 2;
Guennadi Liakhovetskib74ab732009-05-18 16:07:22 +020091 } else {
Stefan Roesed12ae802006-09-12 20:19:10 +020092 /* both ok - check serial */
Igor Grinbergde152b92011-11-07 01:14:10 +000093 if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
Stefan Roesed12ae802006-09-12 20:19:10 +020094 gd->env_valid = 2;
Igor Grinbergde152b92011-11-07 01:14:10 +000095 else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
Stefan Roesed12ae802006-09-12 20:19:10 +020096 gd->env_valid = 1;
Igor Grinbergde152b92011-11-07 01:14:10 +000097 else if (tmp_env1->flags > tmp_env2->flags)
Stefan Roesed12ae802006-09-12 20:19:10 +020098 gd->env_valid = 1;
Igor Grinbergde152b92011-11-07 01:14:10 +000099 else if (tmp_env2->flags > tmp_env1->flags)
Stefan Roesed12ae802006-09-12 20:19:10 +0200100 gd->env_valid = 2;
101 else /* flags are equal - almost impossible */
102 gd->env_valid = 1;
103 }
104
Guennadi Liakhovetskib74ab732009-05-18 16:07:22 +0200105 if (gd->env_valid == 2)
106 env_ptr = tmp_env2;
107 else
108#endif
Stefan Roesed12ae802006-09-12 20:19:10 +0200109 if (gd->env_valid == 1)
110 env_ptr = tmp_env1;
Guennadi Liakhovetskib74ab732009-05-18 16:07:22 +0200111
112 gd->env_addr = (ulong)env_ptr->data;
113
114#else /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */
Igor Grinbergde152b92011-11-07 01:14:10 +0000115 gd->env_addr = (ulong)&default_environment[0];
116 gd->env_valid = 1;
Guennadi Liakhovetskib74ab732009-05-18 16:07:22 +0200117#endif /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */
wdenk13a56952004-06-09 14:58:14 +0000118
Igor Grinbergde152b92011-11-07 01:14:10 +0000119 return 0;
wdenk13a56952004-06-09 14:58:14 +0000120}
121
122#ifdef CMD_SAVEENV
Bartlomiej Siekaaddb2e12006-03-05 18:57:33 +0100123/*
124 * The legacy NAND code saved the environment in the first NAND device i.e.,
125 * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
126 */
Stuart Woodcc49cad2008-05-30 16:05:28 -0400127int writeenv(size_t offset, u_char *buf)
128{
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200129 size_t end = offset + CONFIG_ENV_RANGE;
Stuart Woodcc49cad2008-05-30 16:05:28 -0400130 size_t amount_saved = 0;
Guennadi Liakhovetskic3db8c62008-07-31 12:38:26 +0200131 size_t blocksize, len;
Stuart Woodcc49cad2008-05-30 16:05:28 -0400132 u_char *char_ptr;
133
134 blocksize = nand_info[0].erasesize;
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200135 len = min(blocksize, CONFIG_ENV_SIZE);
Stuart Woodcc49cad2008-05-30 16:05:28 -0400136
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200137 while (amount_saved < CONFIG_ENV_SIZE && offset < end) {
Stuart Woodcc49cad2008-05-30 16:05:28 -0400138 if (nand_block_isbad(&nand_info[0], offset)) {
139 offset += blocksize;
140 } else {
141 char_ptr = &buf[amount_saved];
Igor Grinbergde152b92011-11-07 01:14:10 +0000142 if (nand_write(&nand_info[0], offset, &len, char_ptr))
Stuart Woodcc49cad2008-05-30 16:05:28 -0400143 return 1;
Igor Grinbergde152b92011-11-07 01:14:10 +0000144
Stuart Woodcc49cad2008-05-30 16:05:28 -0400145 offset += blocksize;
Guennadi Liakhovetskic3db8c62008-07-31 12:38:26 +0200146 amount_saved += len;
Stuart Woodcc49cad2008-05-30 16:05:28 -0400147 }
148 }
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200149 if (amount_saved != CONFIG_ENV_SIZE)
Stuart Woodcc49cad2008-05-30 16:05:28 -0400150 return 1;
151
152 return 0;
153}
Scott Woodeef1d712011-02-08 15:25:02 -0600154
Phil Sutter2b262012013-07-19 12:20:26 +0200155struct env_location {
156 const char *name;
157 const nand_erase_options_t erase_opts;
158};
Scott Woodeef1d712011-02-08 15:25:02 -0600159
Phil Sutter2b262012013-07-19 12:20:26 +0200160static int erase_and_write_env(const struct env_location *location,
161 u_char *env_new)
wdenk13a56952004-06-09 14:58:14 +0000162{
Phil Sutter2b262012013-07-19 12:20:26 +0200163 int ret = 0;
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100164
Phil Sutter2b262012013-07-19 12:20:26 +0200165 printf("Erasing %s...\n", location->name);
166 if (nand_erase_opts(&nand_info[0], &location->erase_opts))
Stuart Woodcc49cad2008-05-30 16:05:28 -0400167 return 1;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200168
Phil Sutter2b262012013-07-19 12:20:26 +0200169 printf("Writing to %s... ", location->name);
170 ret = writeenv(location->erase_opts.offset, env_new);
171 puts(ret ? "FAILED!\n" : "OK\n");
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200172
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100173 return ret;
174}
Phil Sutter2b262012013-07-19 12:20:26 +0200175
176#ifdef CONFIG_ENV_OFFSET_REDUND
177static unsigned char env_flags;
178#endif
179
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100180int saveenv(void)
181{
Igor Grinbergde152b92011-11-07 01:14:10 +0000182 int ret = 0;
Tom Rinicd0f4fa2013-04-05 14:55:21 -0400183 ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200184 ssize_t len;
185 char *res;
Phil Sutter2b262012013-07-19 12:20:26 +0200186 int env_idx = 0;
187 static const struct env_location location[] = {
188 {
189 .name = "NAND",
190 .erase_opts = {
191 .length = CONFIG_ENV_RANGE,
192 .offset = CONFIG_ENV_OFFSET,
193 },
194 },
195#ifdef CONFIG_ENV_OFFSET_REDUND
196 {
197 .name = "redundant NAND",
198 .erase_opts = {
199 .length = CONFIG_ENV_RANGE,
200 .offset = CONFIG_ENV_OFFSET_REDUND,
201 },
202 },
203#endif
204 };
Wolfgang Denke093a242008-06-28 23:34:37 +0200205
Stuart Woodcc49cad2008-05-30 16:05:28 -0400206
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200207 if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
Stuart Woodcc49cad2008-05-30 16:05:28 -0400208 return 1;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200209
Tom Rinicd0f4fa2013-04-05 14:55:21 -0400210 res = (char *)&env_new->data;
Joe Hershbergerbe112352012-12-11 22:16:23 -0600211 len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200212 if (len < 0) {
213 error("Cannot export environment: errno = %d\n", errno);
214 return 1;
215 }
Phil Sutter2b262012013-07-19 12:20:26 +0200216 env_new->crc = crc32(0, env_new->data, ENV_SIZE);
217#ifdef CONFIG_ENV_OFFSET_REDUND
218 env_new->flags = ++env_flags; /* increase the serial */
219 env_idx = (gd->env_valid == 1);
220#endif
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200221
Phil Sutter2b262012013-07-19 12:20:26 +0200222 ret = erase_and_write_env(&location[env_idx], (u_char *)env_new);
223#ifdef CONFIG_ENV_OFFSET_REDUND
224 if (!ret) {
225 /* preset other copy for next write */
226 gd->env_valid = gd->env_valid == 2 ? 1 : 2;
227 return ret;
Stuart Woodcc49cad2008-05-30 16:05:28 -0400228 }
Bartlomiej Siekaaddb2e12006-03-05 18:57:33 +0100229
Phil Sutter2b262012013-07-19 12:20:26 +0200230 env_idx = (env_idx + 1) & 1;
231 ret = erase_and_write_env(&location[env_idx], (u_char *)env_new);
232 if (!ret)
233 printf("Warning: primary env write failed,"
234 " redundancy is lost!\n");
235#endif
236
Bartlomiej Siekaaddb2e12006-03-05 18:57:33 +0100237 return ret;
wdenk13a56952004-06-09 14:58:14 +0000238}
239#endif /* CMD_SAVEENV */
240
Igor Grinbergde152b92011-11-07 01:14:10 +0000241int readenv(size_t offset, u_char *buf)
Stuart Woodcc49cad2008-05-30 16:05:28 -0400242{
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200243 size_t end = offset + CONFIG_ENV_RANGE;
Stuart Woodcc49cad2008-05-30 16:05:28 -0400244 size_t amount_loaded = 0;
Guennadi Liakhovetskic3db8c62008-07-31 12:38:26 +0200245 size_t blocksize, len;
Stuart Woodcc49cad2008-05-30 16:05:28 -0400246 u_char *char_ptr;
247
248 blocksize = nand_info[0].erasesize;
Mike Frysinger962ad592010-08-11 23:42:26 -0400249 if (!blocksize)
250 return 1;
Igor Grinbergde152b92011-11-07 01:14:10 +0000251
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200252 len = min(blocksize, CONFIG_ENV_SIZE);
Stuart Woodcc49cad2008-05-30 16:05:28 -0400253
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200254 while (amount_loaded < CONFIG_ENV_SIZE && offset < end) {
Stuart Woodcc49cad2008-05-30 16:05:28 -0400255 if (nand_block_isbad(&nand_info[0], offset)) {
256 offset += blocksize;
257 } else {
258 char_ptr = &buf[amount_loaded];
Igor Grinbergde152b92011-11-07 01:14:10 +0000259 if (nand_read_skip_bad(&nand_info[0], offset,
Tom Rinic39d6a02013-03-14 05:32:50 +0000260 &len, NULL,
261 nand_info[0].size, char_ptr))
Stuart Woodcc49cad2008-05-30 16:05:28 -0400262 return 1;
Igor Grinbergde152b92011-11-07 01:14:10 +0000263
Stuart Woodcc49cad2008-05-30 16:05:28 -0400264 offset += blocksize;
Guennadi Liakhovetskic3db8c62008-07-31 12:38:26 +0200265 amount_loaded += len;
Stuart Woodcc49cad2008-05-30 16:05:28 -0400266 }
267 }
Igor Grinbergde152b92011-11-07 01:14:10 +0000268
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200269 if (amount_loaded != CONFIG_ENV_SIZE)
Stuart Woodcc49cad2008-05-30 16:05:28 -0400270 return 1;
271
272 return 0;
273}
274
Ben Gardinerc9f73512010-07-05 13:27:07 -0400275#ifdef CONFIG_ENV_OFFSET_OOB
276int get_nand_env_oob(nand_info_t *nand, unsigned long *result)
277{
278 struct mtd_oob_ops ops;
Igor Grinbergde152b92011-11-07 01:14:10 +0000279 uint32_t oob_buf[ENV_OFFSET_SIZE / sizeof(uint32_t)];
Ben Gardinerc9f73512010-07-05 13:27:07 -0400280 int ret;
281
Igor Grinbergde152b92011-11-07 01:14:10 +0000282 ops.datbuf = NULL;
283 ops.mode = MTD_OOB_AUTO;
284 ops.ooboffs = 0;
285 ops.ooblen = ENV_OFFSET_SIZE;
286 ops.oobbuf = (void *)oob_buf;
Ben Gardinerc9f73512010-07-05 13:27:07 -0400287
288 ret = nand->read_oob(nand, ENV_OFFSET_SIZE, &ops);
Scott Wood53504a22010-07-12 18:17:40 -0500289 if (ret) {
Ben Gardinerc9f73512010-07-05 13:27:07 -0400290 printf("error reading OOB block 0\n");
Scott Wood53504a22010-07-12 18:17:40 -0500291 return ret;
Ben Gardinerc9f73512010-07-05 13:27:07 -0400292 }
Scott Wood53504a22010-07-12 18:17:40 -0500293
294 if (oob_buf[0] == ENV_OOB_MARKER) {
295 *result = oob_buf[1] * nand->erasesize;
296 } else if (oob_buf[0] == ENV_OOB_MARKER_OLD) {
297 *result = oob_buf[1];
298 } else {
299 printf("No dynamic environment marker in OOB block 0\n");
300 return -ENOENT;
301 }
302
303 return 0;
Ben Gardinerc9f73512010-07-05 13:27:07 -0400304}
305#endif
306
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200307#ifdef CONFIG_ENV_OFFSET_REDUND
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200308void env_relocate_spec(void)
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100309{
310#if !defined(ENV_IS_EMBEDDED)
Phil Sutterb76a1472013-02-21 18:21:55 +0100311 int read1_fail = 0, read2_fail = 0;
Markus Klotzbuecher2770bcb2006-03-24 15:43:16 +0100312 int crc1_ok = 0, crc2_ok = 0;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200313 env_t *ep, *tmp_env1, *tmp_env2;
wdenk13a56952004-06-09 14:58:14 +0000314
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200315 tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE);
316 tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE);
Igor Grinbergde152b92011-11-07 01:14:10 +0000317 if (tmp_env1 == NULL || tmp_env2 == NULL) {
Wolfgang Denk15b86c32010-01-16 21:50:26 -0700318 puts("Can't allocate buffers for environment\n");
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200319 set_default_env("!malloc() failed");
Igor Grinbergde152b92011-11-07 01:14:10 +0000320 goto done;
Wolfgang Denk15b86c32010-01-16 21:50:26 -0700321 }
322
Phil Sutterb76a1472013-02-21 18:21:55 +0100323 read1_fail = readenv(CONFIG_ENV_OFFSET, (u_char *) tmp_env1);
324 read2_fail = readenv(CONFIG_ENV_OFFSET_REDUND, (u_char *) tmp_env2);
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200325
Phil Sutterb76a1472013-02-21 18:21:55 +0100326 if (read1_fail && read2_fail)
327 puts("*** Error - No Valid Environment Area found\n");
328 else if (read1_fail || read2_fail)
329 puts("*** Warning - some problems detected "
330 "reading environment; recovered successfully\n");
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100331
Phil Suttera1eac572013-02-21 18:21:56 +0100332 crc1_ok = !read1_fail &&
333 (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
334 crc2_ok = !read2_fail &&
335 (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100336
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200337 if (!crc1_ok && !crc2_ok) {
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200338 set_default_env("!bad CRC");
Igor Grinbergde152b92011-11-07 01:14:10 +0000339 goto done;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200340 } else if (crc1_ok && !crc2_ok) {
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100341 gd->env_valid = 1;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200342 } else if (!crc1_ok && crc2_ok) {
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100343 gd->env_valid = 2;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200344 } else {
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100345 /* both ok - check serial */
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200346 if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100347 gd->env_valid = 2;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200348 else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100349 gd->env_valid = 1;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200350 else if (tmp_env1->flags > tmp_env2->flags)
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100351 gd->env_valid = 1;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200352 else if (tmp_env2->flags > tmp_env1->flags)
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100353 gd->env_valid = 2;
354 else /* flags are equal - almost impossible */
355 gd->env_valid = 1;
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100356 }
357
358 free(env_ptr);
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200359
360 if (gd->env_valid == 1)
361 ep = tmp_env1;
362 else
363 ep = tmp_env2;
364
Scott Woodeef1d712011-02-08 15:25:02 -0600365 env_flags = ep->flags;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200366 env_import((char *)ep, 0);
367
Igor Grinbergde152b92011-11-07 01:14:10 +0000368done:
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200369 free(tmp_env1);
370 free(tmp_env2);
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100371
372#endif /* ! ENV_IS_EMBEDDED */
373}
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200374#else /* ! CONFIG_ENV_OFFSET_REDUND */
Bartlomiej Siekaaddb2e12006-03-05 18:57:33 +0100375/*
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200376 * The legacy NAND code saved the environment in the first NAND
377 * device i.e., nand_dev_desc + 0. This is also the behaviour using
378 * the new NAND code.
Bartlomiej Siekaaddb2e12006-03-05 18:57:33 +0100379 */
Igor Grinbergde152b92011-11-07 01:14:10 +0000380void env_relocate_spec(void)
wdenk13a56952004-06-09 14:58:14 +0000381{
382#if !defined(ENV_IS_EMBEDDED)
Wolfgang Denkd52fb7e2006-03-11 22:53:33 +0100383 int ret;
Tom Rinicd0f4fa2013-04-05 14:55:21 -0400384 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
wdenk13a56952004-06-09 14:58:14 +0000385
Ben Gardinerc9f73512010-07-05 13:27:07 -0400386#if defined(CONFIG_ENV_OFFSET_OOB)
387 ret = get_nand_env_oob(&nand_info[0], &nand_env_oob_offset);
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200388 /*
389 * If unable to read environment offset from NAND OOB then fall through
Ben Gardinerc9f73512010-07-05 13:27:07 -0400390 * to the normal environment reading code below
391 */
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200392 if (!ret) {
Ben Gardinerc9f73512010-07-05 13:27:07 -0400393 printf("Found Environment offset in OOB..\n");
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200394 } else {
395 set_default_env("!no env offset in OOB");
396 return;
397 }
Ben Gardinerc9f73512010-07-05 13:27:07 -0400398#endif
399
Tom Rinicd0f4fa2013-04-05 14:55:21 -0400400 ret = readenv(CONFIG_ENV_OFFSET, (u_char *)buf);
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200401 if (ret) {
402 set_default_env("!readenv() failed");
403 return;
404 }
wdenk13a56952004-06-09 14:58:14 +0000405
Tom Rinicd0f4fa2013-04-05 14:55:21 -0400406 env_import(buf, 1);
wdenk13a56952004-06-09 14:58:14 +0000407#endif /* ! ENV_IS_EMBEDDED */
wdenk13a56952004-06-09 14:58:14 +0000408}
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200409#endif /* CONFIG_ENV_OFFSET_REDUND */