--- /dev/null
+/*
+ * (C) Copyright 2000-2010
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Andreas Heppel <aheppel@sysgo.de>
+ *
+ * (C) Copyright 2008 Atmel Corporation
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#include <common.h>
+#include <environment.h>
+#include <malloc.h>
+#include <spi_flash.h>
+#include <search.h>
+#include <errno.h>
+
+#ifndef CONFIG_ENV_SPI_BUS
+# define CONFIG_ENV_SPI_BUS 0
+#endif
+#ifndef CONFIG_ENV_SPI_CS
+# define CONFIG_ENV_SPI_CS 0
+#endif
+#ifndef CONFIG_ENV_SPI_MAX_HZ
+# define CONFIG_ENV_SPI_MAX_HZ 1000000
+#endif
+#ifndef CONFIG_ENV_SPI_MODE
+# define CONFIG_ENV_SPI_MODE SPI_MODE_3
+#endif
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
+static ulong env_offset = CONFIG_ENV_OFFSET;
+static ulong env_new_offset = CONFIG_ENV_OFFSET_REDUND;
+
+#define ACTIVE_FLAG 1
+#define OBSOLETE_FLAG 0
+#endif /* CONFIG_ENV_OFFSET_REDUND */
+
+DECLARE_GLOBAL_DATA_PTR;
+
+char *env_name_spec = "SPI Flash";
+
+static struct spi_flash *env_flash;
+
+#if defined(CONFIG_ENV_OFFSET_REDUND)
+int saveenv(void)
+{
+ env_t env_new;
+ char *saved_buffer = NULL, flag = OBSOLETE_FLAG;
+ u32 saved_size, saved_offset, sector = 1;
+ int ret;
+
+ if (!env_flash) {
+ env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
+ CONFIG_ENV_SPI_CS,
+ CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
+ if (!env_flash) {
+ set_default_env("!spi_flash_probe() failed");
+ return 1;
+ }
+ }
+
+ ret = env_export(&env_new);
+ if (ret)
+ return ret;
+ env_new.flags = ACTIVE_FLAG;
+
+ if (gd->env_valid == 1) {
+ env_new_offset = CONFIG_ENV_OFFSET_REDUND;
+ env_offset = CONFIG_ENV_OFFSET;
+ } else {
+ env_new_offset = CONFIG_ENV_OFFSET;
+ env_offset = CONFIG_ENV_OFFSET_REDUND;
+ }
+
+ /* Is the sector larger than the env (i.e. embedded) */
+ if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
+ saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
+ saved_offset = env_new_offset + CONFIG_ENV_SIZE;
+ saved_buffer = malloc(saved_size);
+ if (!saved_buffer) {
+ ret = 1;
+ goto done;
+ }
+ ret = spi_flash_read(env_flash, saved_offset,
+ saved_size, saved_buffer);
+ if (ret)
+ goto done;
+ }
+
+ if (CONFIG_ENV_SIZE > CONFIG_ENV_SECT_SIZE) {
+ sector = CONFIG_ENV_SIZE / CONFIG_ENV_SECT_SIZE;
+ if (CONFIG_ENV_SIZE % CONFIG_ENV_SECT_SIZE)
+ sector++;
+ }
+
+ puts("Erasing SPI flash...");
+ ret = spi_flash_erase(env_flash, env_new_offset,
+ sector * CONFIG_ENV_SECT_SIZE);
+ if (ret)
+ goto done;
+
+ puts("Writing to SPI flash...");
+
+ ret = spi_flash_write(env_flash, env_new_offset,
+ CONFIG_ENV_SIZE, &env_new);
+ if (ret)
+ goto done;
+
+ if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
+ ret = spi_flash_write(env_flash, saved_offset,
+ saved_size, saved_buffer);
+ if (ret)
+ goto done;
+ }
+
+ ret = spi_flash_write(env_flash, env_offset + offsetof(env_t, flags),
+ sizeof(env_new.flags), &flag);
+ if (ret)
+ goto done;
+
+ puts("done\n");
+
+ gd->env_valid = gd->env_valid == 2 ? 1 : 2;
+
+ printf("Valid environment: %d\n", (int)gd->env_valid);
+
+ done:
+ if (saved_buffer)
+ free(saved_buffer);
+
+ return ret;
+}
+
+void env_relocate_spec(void)
+{
+ int ret;
+ int crc1_ok = 0, crc2_ok = 0;
+ env_t *tmp_env1 = NULL;
+ env_t *tmp_env2 = NULL;
+ env_t *ep = NULL;
+
+ tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE);
+ tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE);
+
+ if (!tmp_env1 || !tmp_env2) {
+ set_default_env("!malloc() failed");
+ goto out;
+ }
+
+ env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
+ CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
+ if (!env_flash) {
+ set_default_env("!spi_flash_probe() failed");
+ goto out;
+ }
+
+ ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
+ CONFIG_ENV_SIZE, tmp_env1);
+ if (ret) {
+ set_default_env("!spi_flash_read() failed");
+ goto err_read;
+ }
+
+ if (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc)
+ crc1_ok = 1;
+
+ ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
+ CONFIG_ENV_SIZE, tmp_env2);
+ if (!ret) {
+ if (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc)
+ crc2_ok = 1;
+ }
+
+ if (!crc1_ok && !crc2_ok) {
+ set_default_env("!bad CRC");
+ goto err_read;
+ } else if (crc1_ok && !crc2_ok) {
+ gd->env_valid = 1;
+ } else if (!crc1_ok && crc2_ok) {
+ gd->env_valid = 2;
+ } else if (tmp_env1->flags == ACTIVE_FLAG &&
+ tmp_env2->flags == OBSOLETE_FLAG) {
+ gd->env_valid = 1;
+ } else if (tmp_env1->flags == OBSOLETE_FLAG &&
+ tmp_env2->flags == ACTIVE_FLAG) {
+ gd->env_valid = 2;
+ } else if (tmp_env1->flags == tmp_env2->flags) {
+ gd->env_valid = 2;
+ } else if (tmp_env1->flags == 0xFF) {
+ gd->env_valid = 2;
+ } else {
+ /*
+ * this differs from code in env_flash.c, but I think a sane
+ * default path is desirable.
+ */
+ gd->env_valid = 2;
+ }
+
+ if (gd->env_valid == 1)
+ ep = tmp_env1;
+ else
+ ep = tmp_env2;
+
+ ret = env_import((char *)ep, 0);
+ if (!ret) {
+ error("Cannot import environment: errno = %d\n", errno);
+ set_default_env("env_import failed");
+ }
+
+err_read:
+ spi_flash_free(env_flash);
+ env_flash = NULL;
+out:
+ free(tmp_env1);
+ free(tmp_env2);
+}
+#else
+int saveenv(void)
+{
+ u32 saved_size, saved_offset, sector = 1;
+ char *saved_buffer = NULL;
+ int ret = 1;
+ env_t env_new;
+
+ if (!env_flash) {
+ env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
+ CONFIG_ENV_SPI_CS,
+ CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
+ if (!env_flash) {
+ set_default_env("!spi_flash_probe() failed");
+ return 1;
+ }
+ }
+
+ /* Is the sector larger than the env (i.e. embedded) */
+ if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
+ saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
+ saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE;
+ saved_buffer = malloc(saved_size);
+ if (!saved_buffer)
+ goto done;
+
+ ret = spi_flash_read(env_flash, saved_offset,
+ saved_size, saved_buffer);
+ if (ret)
+ goto done;
+ }
+
+ if (CONFIG_ENV_SIZE > CONFIG_ENV_SECT_SIZE) {
+ sector = CONFIG_ENV_SIZE / CONFIG_ENV_SECT_SIZE;
+ if (CONFIG_ENV_SIZE % CONFIG_ENV_SECT_SIZE)
+ sector++;
+ }
+
+ ret = env_export(&env_new);
+ if (ret)
+ goto done;
+
+ puts("Erasing SPI flash...");
+ ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET,
+ sector * CONFIG_ENV_SECT_SIZE);
+ if (ret)
+ goto done;
+
+ puts("Writing to SPI flash...");
+ ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET,
+ CONFIG_ENV_SIZE, &env_new);
+ if (ret)
+ goto done;
+
+ if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
+ ret = spi_flash_write(env_flash, saved_offset,
+ saved_size, saved_buffer);
+ if (ret)
+ goto done;
+ }
+
+ ret = 0;
+ puts("done\n");
+
+ done:
+ if (saved_buffer)
+ free(saved_buffer);
+
+ return ret;
+}
+
+void env_relocate_spec(void)
+{
+ int ret;
+ char *buf = NULL;
+
+ buf = (char *)malloc(CONFIG_ENV_SIZE);
+ env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
+ CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
+ if (!env_flash) {
+ set_default_env("!spi_flash_probe() failed");
+ if (buf)
+ free(buf);
+ return;
+ }
+
+ ret = spi_flash_read(env_flash,
+ CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
+ if (ret) {
+ set_default_env("!spi_flash_read() failed");
+ goto out;
+ }
+
+ ret = env_import(buf, 1);
+ if (ret)
+ gd->env_valid = 1;
+out:
+ spi_flash_free(env_flash);
+ if (buf)
+ free(buf);
+ env_flash = NULL;
+}
+#endif
+
+int env_init(void)
+{
+ /* SPI flash isn't usable before relocation */
+ gd->env_addr = (ulong)&default_environment[0];
+ gd->env_valid = 1;
+
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff