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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 */
Jeroen Hofstee45f08d32014-10-08 22:57:35 +0200127static int writeenv(size_t offset, u_char *buf)
Stuart Woodcc49cad2008-05-30 16:05:28 -0400128{
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;
Masahiro Yamadab4141192014-11-07 03:03:31 +0900135 len = min(blocksize, (size_t)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);
Phil Sutter2b262012013-07-19 12:20:26 +0200184 int env_idx = 0;
185 static const struct env_location location[] = {
186 {
187 .name = "NAND",
188 .erase_opts = {
189 .length = CONFIG_ENV_RANGE,
190 .offset = CONFIG_ENV_OFFSET,
191 },
192 },
193#ifdef CONFIG_ENV_OFFSET_REDUND
194 {
195 .name = "redundant NAND",
196 .erase_opts = {
197 .length = CONFIG_ENV_RANGE,
198 .offset = CONFIG_ENV_OFFSET_REDUND,
199 },
200 },
201#endif
202 };
Wolfgang Denke093a242008-06-28 23:34:37 +0200203
Stuart Woodcc49cad2008-05-30 16:05:28 -0400204
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200205 if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
Stuart Woodcc49cad2008-05-30 16:05:28 -0400206 return 1;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200207
Marek Vasut7ce15262014-03-05 19:59:50 +0100208 ret = env_export(env_new);
209 if (ret)
210 return ret;
211
Phil Sutter2b262012013-07-19 12:20:26 +0200212#ifdef CONFIG_ENV_OFFSET_REDUND
213 env_new->flags = ++env_flags; /* increase the serial */
214 env_idx = (gd->env_valid == 1);
215#endif
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200216
Phil Sutter2b262012013-07-19 12:20:26 +0200217 ret = erase_and_write_env(&location[env_idx], (u_char *)env_new);
218#ifdef CONFIG_ENV_OFFSET_REDUND
219 if (!ret) {
220 /* preset other copy for next write */
221 gd->env_valid = gd->env_valid == 2 ? 1 : 2;
222 return ret;
Stuart Woodcc49cad2008-05-30 16:05:28 -0400223 }
Bartlomiej Siekaaddb2e12006-03-05 18:57:33 +0100224
Phil Sutter2b262012013-07-19 12:20:26 +0200225 env_idx = (env_idx + 1) & 1;
226 ret = erase_and_write_env(&location[env_idx], (u_char *)env_new);
227 if (!ret)
228 printf("Warning: primary env write failed,"
229 " redundancy is lost!\n");
230#endif
231
Bartlomiej Siekaaddb2e12006-03-05 18:57:33 +0100232 return ret;
wdenk13a56952004-06-09 14:58:14 +0000233}
234#endif /* CMD_SAVEENV */
235
Jeroen Hofstee45f08d32014-10-08 22:57:35 +0200236static int readenv(size_t offset, u_char *buf)
Stuart Woodcc49cad2008-05-30 16:05:28 -0400237{
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200238 size_t end = offset + CONFIG_ENV_RANGE;
Stuart Woodcc49cad2008-05-30 16:05:28 -0400239 size_t amount_loaded = 0;
Guennadi Liakhovetskic3db8c62008-07-31 12:38:26 +0200240 size_t blocksize, len;
Stuart Woodcc49cad2008-05-30 16:05:28 -0400241 u_char *char_ptr;
242
243 blocksize = nand_info[0].erasesize;
Mike Frysinger962ad592010-08-11 23:42:26 -0400244 if (!blocksize)
245 return 1;
Igor Grinbergde152b92011-11-07 01:14:10 +0000246
Masahiro Yamadab4141192014-11-07 03:03:31 +0900247 len = min(blocksize, (size_t)CONFIG_ENV_SIZE);
Stuart Woodcc49cad2008-05-30 16:05:28 -0400248
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200249 while (amount_loaded < CONFIG_ENV_SIZE && offset < end) {
Stuart Woodcc49cad2008-05-30 16:05:28 -0400250 if (nand_block_isbad(&nand_info[0], offset)) {
251 offset += blocksize;
252 } else {
253 char_ptr = &buf[amount_loaded];
Igor Grinbergde152b92011-11-07 01:14:10 +0000254 if (nand_read_skip_bad(&nand_info[0], offset,
Tom Rinic39d6a02013-03-14 05:32:50 +0000255 &len, NULL,
256 nand_info[0].size, char_ptr))
Stuart Woodcc49cad2008-05-30 16:05:28 -0400257 return 1;
Igor Grinbergde152b92011-11-07 01:14:10 +0000258
Stuart Woodcc49cad2008-05-30 16:05:28 -0400259 offset += blocksize;
Guennadi Liakhovetskic3db8c62008-07-31 12:38:26 +0200260 amount_loaded += len;
Stuart Woodcc49cad2008-05-30 16:05:28 -0400261 }
262 }
Igor Grinbergde152b92011-11-07 01:14:10 +0000263
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200264 if (amount_loaded != CONFIG_ENV_SIZE)
Stuart Woodcc49cad2008-05-30 16:05:28 -0400265 return 1;
266
267 return 0;
268}
269
Ben Gardinerc9f73512010-07-05 13:27:07 -0400270#ifdef CONFIG_ENV_OFFSET_OOB
271int get_nand_env_oob(nand_info_t *nand, unsigned long *result)
272{
273 struct mtd_oob_ops ops;
Igor Grinbergde152b92011-11-07 01:14:10 +0000274 uint32_t oob_buf[ENV_OFFSET_SIZE / sizeof(uint32_t)];
Ben Gardinerc9f73512010-07-05 13:27:07 -0400275 int ret;
276
Igor Grinbergde152b92011-11-07 01:14:10 +0000277 ops.datbuf = NULL;
278 ops.mode = MTD_OOB_AUTO;
279 ops.ooboffs = 0;
280 ops.ooblen = ENV_OFFSET_SIZE;
281 ops.oobbuf = (void *)oob_buf;
Ben Gardinerc9f73512010-07-05 13:27:07 -0400282
283 ret = nand->read_oob(nand, ENV_OFFSET_SIZE, &ops);
Scott Wood53504a22010-07-12 18:17:40 -0500284 if (ret) {
Ben Gardinerc9f73512010-07-05 13:27:07 -0400285 printf("error reading OOB block 0\n");
Scott Wood53504a22010-07-12 18:17:40 -0500286 return ret;
Ben Gardinerc9f73512010-07-05 13:27:07 -0400287 }
Scott Wood53504a22010-07-12 18:17:40 -0500288
289 if (oob_buf[0] == ENV_OOB_MARKER) {
290 *result = oob_buf[1] * nand->erasesize;
291 } else if (oob_buf[0] == ENV_OOB_MARKER_OLD) {
292 *result = oob_buf[1];
293 } else {
294 printf("No dynamic environment marker in OOB block 0\n");
295 return -ENOENT;
296 }
297
298 return 0;
Ben Gardinerc9f73512010-07-05 13:27:07 -0400299}
300#endif
301
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200302#ifdef CONFIG_ENV_OFFSET_REDUND
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200303void env_relocate_spec(void)
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100304{
305#if !defined(ENV_IS_EMBEDDED)
Phil Sutterb76a1472013-02-21 18:21:55 +0100306 int read1_fail = 0, read2_fail = 0;
Markus Klotzbuecher2770bcb2006-03-24 15:43:16 +0100307 int crc1_ok = 0, crc2_ok = 0;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200308 env_t *ep, *tmp_env1, *tmp_env2;
wdenk13a56952004-06-09 14:58:14 +0000309
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200310 tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE);
311 tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE);
Igor Grinbergde152b92011-11-07 01:14:10 +0000312 if (tmp_env1 == NULL || tmp_env2 == NULL) {
Wolfgang Denk15b86c32010-01-16 21:50:26 -0700313 puts("Can't allocate buffers for environment\n");
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200314 set_default_env("!malloc() failed");
Igor Grinbergde152b92011-11-07 01:14:10 +0000315 goto done;
Wolfgang Denk15b86c32010-01-16 21:50:26 -0700316 }
317
Phil Sutterb76a1472013-02-21 18:21:55 +0100318 read1_fail = readenv(CONFIG_ENV_OFFSET, (u_char *) tmp_env1);
319 read2_fail = readenv(CONFIG_ENV_OFFSET_REDUND, (u_char *) tmp_env2);
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200320
Phil Sutterb76a1472013-02-21 18:21:55 +0100321 if (read1_fail && read2_fail)
322 puts("*** Error - No Valid Environment Area found\n");
323 else if (read1_fail || read2_fail)
324 puts("*** Warning - some problems detected "
325 "reading environment; recovered successfully\n");
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100326
Phil Suttera1eac572013-02-21 18:21:56 +0100327 crc1_ok = !read1_fail &&
328 (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
329 crc2_ok = !read2_fail &&
330 (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100331
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200332 if (!crc1_ok && !crc2_ok) {
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200333 set_default_env("!bad CRC");
Igor Grinbergde152b92011-11-07 01:14:10 +0000334 goto done;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200335 } else if (crc1_ok && !crc2_ok) {
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100336 gd->env_valid = 1;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200337 } else if (!crc1_ok && crc2_ok) {
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100338 gd->env_valid = 2;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200339 } else {
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100340 /* both ok - check serial */
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200341 if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100342 gd->env_valid = 2;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200343 else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100344 gd->env_valid = 1;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200345 else if (tmp_env1->flags > tmp_env2->flags)
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100346 gd->env_valid = 1;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200347 else if (tmp_env2->flags > tmp_env1->flags)
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100348 gd->env_valid = 2;
349 else /* flags are equal - almost impossible */
350 gd->env_valid = 1;
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100351 }
352
353 free(env_ptr);
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200354
355 if (gd->env_valid == 1)
356 ep = tmp_env1;
357 else
358 ep = tmp_env2;
359
Scott Woodeef1d712011-02-08 15:25:02 -0600360 env_flags = ep->flags;
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200361 env_import((char *)ep, 0);
362
Igor Grinbergde152b92011-11-07 01:14:10 +0000363done:
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200364 free(tmp_env1);
365 free(tmp_env2);
Markus Klotzbuechere443c942006-03-20 18:02:44 +0100366
367#endif /* ! ENV_IS_EMBEDDED */
368}
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200369#else /* ! CONFIG_ENV_OFFSET_REDUND */
Bartlomiej Siekaaddb2e12006-03-05 18:57:33 +0100370/*
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200371 * The legacy NAND code saved the environment in the first NAND
372 * device i.e., nand_dev_desc + 0. This is also the behaviour using
373 * the new NAND code.
Bartlomiej Siekaaddb2e12006-03-05 18:57:33 +0100374 */
Igor Grinbergde152b92011-11-07 01:14:10 +0000375void env_relocate_spec(void)
wdenk13a56952004-06-09 14:58:14 +0000376{
377#if !defined(ENV_IS_EMBEDDED)
Wolfgang Denkd52fb7e2006-03-11 22:53:33 +0100378 int ret;
Tom Rinicd0f4fa2013-04-05 14:55:21 -0400379 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
wdenk13a56952004-06-09 14:58:14 +0000380
Ben Gardinerc9f73512010-07-05 13:27:07 -0400381#if defined(CONFIG_ENV_OFFSET_OOB)
382 ret = get_nand_env_oob(&nand_info[0], &nand_env_oob_offset);
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200383 /*
384 * If unable to read environment offset from NAND OOB then fall through
Ben Gardinerc9f73512010-07-05 13:27:07 -0400385 * to the normal environment reading code below
386 */
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200387 if (!ret) {
Ben Gardinerc9f73512010-07-05 13:27:07 -0400388 printf("Found Environment offset in OOB..\n");
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200389 } else {
390 set_default_env("!no env offset in OOB");
391 return;
392 }
Ben Gardinerc9f73512010-07-05 13:27:07 -0400393#endif
394
Tom Rinicd0f4fa2013-04-05 14:55:21 -0400395 ret = readenv(CONFIG_ENV_OFFSET, (u_char *)buf);
Wolfgang Denkea882ba2010-06-20 23:33:59 +0200396 if (ret) {
397 set_default_env("!readenv() failed");
398 return;
399 }
wdenk13a56952004-06-09 14:58:14 +0000400
Tom Rinicd0f4fa2013-04-05 14:55:21 -0400401 env_import(buf, 1);
wdenk13a56952004-06-09 14:58:14 +0000402#endif /* ! ENV_IS_EMBEDDED */
wdenk13a56952004-06-09 14:58:14 +0000403}
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +0200404#endif /* CONFIG_ENV_OFFSET_REDUND */