--- /dev/null
+/*
+ * (C) Copyright 2000-2010
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2008
+ * Stuart Wood, Lab X Technologies <stuart.wood@labxtechnologies.com>
+ *
+ * (C) Copyright 2004
+ * Jian Zhang, Texas Instruments, jzhang@ti.com.
+ *
+ * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Andreas Heppel <aheppel@sysgo.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <environment.h>
+#include <linux/stddef.h>
+#include <malloc.h>
+#include <nand.h>
+#include <search.h>
+#include <errno.h>
+
+#if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_NAND)
+#define CMD_SAVEENV
+#elif defined(CONFIG_ENV_OFFSET_REDUND)
+#error CONFIG_ENV_OFFSET_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_NAND
+#endif
+
+#if defined(CONFIG_ENV_SIZE_REDUND) && \
+ (CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
+#error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
+#endif
+
+#ifndef CONFIG_ENV_RANGE
+#define CONFIG_ENV_RANGE CONFIG_ENV_SIZE
+#endif
+
+char *env_name_spec = "NAND";
+
+#if defined(ENV_IS_EMBEDDED)
+env_t *env_ptr = &environment;
+#elif defined(CONFIG_NAND_ENV_DST)
+env_t *env_ptr = (env_t *)CONFIG_NAND_ENV_DST;
+#else /* ! ENV_IS_EMBEDDED */
+env_t *env_ptr;
+#endif /* ENV_IS_EMBEDDED */
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * This is called before nand_init() so we can't read NAND to
+ * validate env data.
+ *
+ * Mark it OK for now. env_relocate() in env_common.c will call our
+ * relocate function which does the real validation.
+ *
+ * When using a NAND boot image (like sequoia_nand), the environment
+ * can be embedded or attached to the U-Boot image in NAND flash.
+ * This way the SPL loads not only the U-Boot image from NAND but
+ * also the environment.
+ */
+int env_init(void)
+{
+#if defined(ENV_IS_EMBEDDED) || defined(CONFIG_NAND_ENV_DST)
+ int crc1_ok = 0, crc2_ok = 0;
+ env_t *tmp_env1;
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
+ env_t *tmp_env2;
+
+ tmp_env2 = (env_t *)((ulong)env_ptr + CONFIG_ENV_SIZE);
+ crc2_ok = crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc;
+#endif
+ tmp_env1 = env_ptr;
+ crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc;
+
+ if (!crc1_ok && !crc2_ok) {
+ gd->env_addr = 0;
+ gd->env_valid = 0;
+
+ return 0;
+ } else if (crc1_ok && !crc2_ok) {
+ gd->env_valid = 1;
+ }
+#ifdef CONFIG_ENV_OFFSET_REDUND
+ else if (!crc1_ok && crc2_ok) {
+ gd->env_valid = 2;
+ } else {
+ /* both ok - check serial */
+ if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
+ gd->env_valid = 2;
+ else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
+ gd->env_valid = 1;
+ else if (tmp_env1->flags > tmp_env2->flags)
+ gd->env_valid = 1;
+ else if (tmp_env2->flags > tmp_env1->flags)
+ gd->env_valid = 2;
+ else /* flags are equal - almost impossible */
+ gd->env_valid = 1;
+ }
+
+ if (gd->env_valid == 2)
+ env_ptr = tmp_env2;
+ else
+#endif
+ if (gd->env_valid == 1)
+ env_ptr = tmp_env1;
+
+ gd->env_addr = (ulong)env_ptr->data;
+
+#else /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */
+ gd->env_addr = (ulong)&default_environment[0];
+ gd->env_valid = 1;
+#endif /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */
+
+ return 0;
+}
+
+#ifdef CMD_SAVEENV
+/*
+ * The legacy NAND code saved the environment in the first NAND device i.e.,
+ * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
+ */
+int writeenv(size_t offset, u_char *buf)
+{
+ size_t end = offset + CONFIG_ENV_RANGE;
+ size_t amount_saved = 0;
+ size_t blocksize, len;
+ u_char *char_ptr;
+
+ blocksize = nand_info[0].erasesize;
+ len = min(blocksize, CONFIG_ENV_SIZE);
+
+ while (amount_saved < CONFIG_ENV_SIZE && offset < end) {
+ if (nand_block_isbad(&nand_info[0], offset)) {
+ offset += blocksize;
+ } else {
+ char_ptr = &buf[amount_saved];
+ if (nand_write(&nand_info[0], offset, &len, char_ptr))
+ return 1;
+
+ offset += blocksize;
+ amount_saved += len;
+ }
+ }
+ if (amount_saved != CONFIG_ENV_SIZE)
+ return 1;
+
+ return 0;
+}
+
+struct env_location {
+ const char *name;
+ const nand_erase_options_t erase_opts;
+};
+
+static int erase_and_write_env(const struct env_location *location,
+ u_char *env_new)
+{
+ int ret = 0;
+
+ printf("Erasing %s...\n", location->name);
+ if (nand_erase_opts(&nand_info[0], &location->erase_opts))
+ return 1;
+
+ printf("Writing to %s... ", location->name);
+ ret = writeenv(location->erase_opts.offset, env_new);
+ puts(ret ? "FAILED!\n" : "OK\n");
+
+ return ret;
+}
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
+static unsigned char env_flags;
+#endif
+
+int saveenv(void)
+{
+ int ret = 0;
+ ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
+ int env_idx = 0;
+ static const struct env_location location[] = {
+ {
+ .name = "NAND",
+ .erase_opts = {
+ .length = CONFIG_ENV_RANGE,
+ .offset = CONFIG_ENV_OFFSET,
+ },
+ },
+#ifdef CONFIG_ENV_OFFSET_REDUND
+ {
+ .name = "redundant NAND",
+ .erase_opts = {
+ .length = CONFIG_ENV_RANGE,
+ .offset = CONFIG_ENV_OFFSET_REDUND,
+ },
+ },
+#endif
+ };
+
+
+ if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
+ return 1;
+
+ ret = env_export(env_new);
+ if (ret)
+ return ret;
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
+ env_new->flags = ++env_flags; /* increase the serial */
+ env_idx = (gd->env_valid == 1);
+#endif
+
+ ret = erase_and_write_env(&location[env_idx], (u_char *)env_new);
+#ifdef CONFIG_ENV_OFFSET_REDUND
+ if (!ret) {
+ /* preset other copy for next write */
+ gd->env_valid = gd->env_valid == 2 ? 1 : 2;
+ return ret;
+ }
+
+ env_idx = (env_idx + 1) & 1;
+ ret = erase_and_write_env(&location[env_idx], (u_char *)env_new);
+ if (!ret)
+ printf("Warning: primary env write failed,"
+ " redundancy is lost!\n");
+#endif
+
+ return ret;
+}
+#endif /* CMD_SAVEENV */
+
+int readenv(size_t offset, u_char *buf)
+{
+ size_t end = offset + CONFIG_ENV_RANGE;
+ size_t amount_loaded = 0;
+ size_t blocksize, len;
+ u_char *char_ptr;
+
+ blocksize = nand_info[0].erasesize;
+ if (!blocksize)
+ return 1;
+
+ len = min(blocksize, CONFIG_ENV_SIZE);
+
+ while (amount_loaded < CONFIG_ENV_SIZE && offset < end) {
+ if (nand_block_isbad(&nand_info[0], offset)) {
+ offset += blocksize;
+ } else {
+ char_ptr = &buf[amount_loaded];
+ if (nand_read_skip_bad(&nand_info[0], offset,
+ &len, NULL,
+ nand_info[0].size, char_ptr))
+ return 1;
+
+ offset += blocksize;
+ amount_loaded += len;
+ }
+ }
+
+ if (amount_loaded != CONFIG_ENV_SIZE)
+ return 1;
+
+ return 0;
+}
+
+#ifdef CONFIG_ENV_OFFSET_OOB
+int get_nand_env_oob(nand_info_t *nand, unsigned long *result)
+{
+ struct mtd_oob_ops ops;
+ uint32_t oob_buf[ENV_OFFSET_SIZE / sizeof(uint32_t)];
+ int ret;
+
+ ops.datbuf = NULL;
+ ops.mode = MTD_OOB_AUTO;
+ ops.ooboffs = 0;
+ ops.ooblen = ENV_OFFSET_SIZE;
+ ops.oobbuf = (void *)oob_buf;
+
+ ret = nand->read_oob(nand, ENV_OFFSET_SIZE, &ops);
+ if (ret) {
+ printf("error reading OOB block 0\n");
+ return ret;
+ }
+
+ if (oob_buf[0] == ENV_OOB_MARKER) {
+ *result = oob_buf[1] * nand->erasesize;
+ } else if (oob_buf[0] == ENV_OOB_MARKER_OLD) {
+ *result = oob_buf[1];
+ } else {
+ printf("No dynamic environment marker in OOB block 0\n");
+ return -ENOENT;
+ }
+
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
+void env_relocate_spec(void)
+{
+#if !defined(ENV_IS_EMBEDDED)
+ int read1_fail = 0, read2_fail = 0;
+ int crc1_ok = 0, crc2_ok = 0;
+ env_t *ep, *tmp_env1, *tmp_env2;
+
+ tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE);
+ tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE);
+ if (tmp_env1 == NULL || tmp_env2 == NULL) {
+ puts("Can't allocate buffers for environment\n");
+ set_default_env("!malloc() failed");
+ goto done;
+ }
+
+ read1_fail = readenv(CONFIG_ENV_OFFSET, (u_char *) tmp_env1);
+ read2_fail = readenv(CONFIG_ENV_OFFSET_REDUND, (u_char *) tmp_env2);
+
+ if (read1_fail && read2_fail)
+ puts("*** Error - No Valid Environment Area found\n");
+ else if (read1_fail || read2_fail)
+ puts("*** Warning - some problems detected "
+ "reading environment; recovered successfully\n");
+
+ crc1_ok = !read1_fail &&
+ (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
+ crc2_ok = !read2_fail &&
+ (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
+
+ if (!crc1_ok && !crc2_ok) {
+ set_default_env("!bad CRC");
+ goto done;
+ } else if (crc1_ok && !crc2_ok) {
+ gd->env_valid = 1;
+ } else if (!crc1_ok && crc2_ok) {
+ gd->env_valid = 2;
+ } else {
+ /* both ok - check serial */
+ if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
+ gd->env_valid = 2;
+ else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
+ gd->env_valid = 1;
+ else if (tmp_env1->flags > tmp_env2->flags)
+ gd->env_valid = 1;
+ else if (tmp_env2->flags > tmp_env1->flags)
+ gd->env_valid = 2;
+ else /* flags are equal - almost impossible */
+ gd->env_valid = 1;
+ }
+
+ free(env_ptr);
+
+ if (gd->env_valid == 1)
+ ep = tmp_env1;
+ else
+ ep = tmp_env2;
+
+ env_flags = ep->flags;
+ env_import((char *)ep, 0);
+
+done:
+ free(tmp_env1);
+ free(tmp_env2);
+
+#endif /* ! ENV_IS_EMBEDDED */
+}
+#else /* ! CONFIG_ENV_OFFSET_REDUND */
+/*
+ * The legacy NAND code saved the environment in the first NAND
+ * device i.e., nand_dev_desc + 0. This is also the behaviour using
+ * the new NAND code.
+ */
+void env_relocate_spec(void)
+{
+#if !defined(ENV_IS_EMBEDDED)
+ int ret;
+ ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
+
+#if defined(CONFIG_ENV_OFFSET_OOB)
+ ret = get_nand_env_oob(&nand_info[0], &nand_env_oob_offset);
+ /*
+ * If unable to read environment offset from NAND OOB then fall through
+ * to the normal environment reading code below
+ */
+ if (!ret) {
+ printf("Found Environment offset in OOB..\n");
+ } else {
+ set_default_env("!no env offset in OOB");
+ return;
+ }
+#endif
+
+ ret = readenv(CONFIG_ENV_OFFSET, (u_char *)buf);
+ if (ret) {
+ set_default_env("!readenv() failed");
+ return;
+ }
+
+ env_import(buf, 1);
+#endif /* ! ENV_IS_EMBEDDED */
+}
+#endif /* CONFIG_ENV_OFFSET_REDUND */
Code Review / kvmfornfv.git / blobdiff