323 lines
6.6 KiB
C
323 lines
6.6 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2000-2010
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Andreas Heppel <aheppel@sysgo.de>
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*
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* (C) Copyright 2008 Atmel Corporation
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*/
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#include <common.h>
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#include <dm.h>
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#include <env.h>
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#include <env_internal.h>
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#include <malloc.h>
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#include <spi.h>
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#include <spi_flash.h>
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#include <search.h>
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#include <errno.h>
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#include <dm/device-internal.h>
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#include <u-boot/crc.h>
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#ifndef CONFIG_SPL_BUILD
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#define CMD_SAVEENV
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#define INITENV
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#endif
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#ifdef CONFIG_ENV_OFFSET_REDUND
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#ifdef CMD_SAVEENV
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static ulong env_offset = CONFIG_ENV_OFFSET;
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static ulong env_new_offset = CONFIG_ENV_OFFSET_REDUND;
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#endif
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#endif /* CONFIG_ENV_OFFSET_REDUND */
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DECLARE_GLOBAL_DATA_PTR;
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static struct spi_flash *env_flash;
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static int setup_flash_device(void)
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{
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#ifdef CONFIG_DM_SPI_FLASH
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struct udevice *new;
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int ret;
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/* speed and mode will be read from DT */
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ret = spi_flash_probe_bus_cs(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
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CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE,
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&new);
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if (ret) {
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env_set_default("spi_flash_probe_bus_cs() failed", 0);
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return ret;
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}
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env_flash = dev_get_uclass_priv(new);
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#else
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if (!env_flash) {
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env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
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CONFIG_ENV_SPI_CS,
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CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
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if (!env_flash) {
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env_set_default("spi_flash_probe() failed", 0);
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return -EIO;
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}
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}
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#endif
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return 0;
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}
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#if defined(CONFIG_ENV_OFFSET_REDUND)
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#ifdef CMD_SAVEENV
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static int env_sf_save(void)
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{
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env_t env_new;
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char *saved_buffer = NULL, flag = ENV_REDUND_OBSOLETE;
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u32 saved_size, saved_offset, sector;
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int ret;
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ret = setup_flash_device();
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if (ret)
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return ret;
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ret = env_export(&env_new);
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if (ret)
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return -EIO;
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env_new.flags = ENV_REDUND_ACTIVE;
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if (gd->env_valid == ENV_VALID) {
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env_new_offset = CONFIG_ENV_OFFSET_REDUND;
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env_offset = CONFIG_ENV_OFFSET;
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} else {
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env_new_offset = CONFIG_ENV_OFFSET;
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env_offset = CONFIG_ENV_OFFSET_REDUND;
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}
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/* Is the sector larger than the env (i.e. embedded) */
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if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
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saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
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saved_offset = env_new_offset + CONFIG_ENV_SIZE;
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saved_buffer = memalign(ARCH_DMA_MINALIGN, saved_size);
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if (!saved_buffer) {
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ret = -ENOMEM;
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goto done;
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}
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ret = spi_flash_read(env_flash, saved_offset,
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saved_size, saved_buffer);
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if (ret)
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goto done;
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}
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sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);
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puts("Erasing SPI flash...");
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ret = spi_flash_erase(env_flash, env_new_offset,
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sector * CONFIG_ENV_SECT_SIZE);
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if (ret)
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goto done;
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puts("Writing to SPI flash...");
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ret = spi_flash_write(env_flash, env_new_offset,
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CONFIG_ENV_SIZE, &env_new);
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if (ret)
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goto done;
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if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
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ret = spi_flash_write(env_flash, saved_offset,
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saved_size, saved_buffer);
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if (ret)
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goto done;
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}
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ret = spi_flash_write(env_flash, env_offset + offsetof(env_t, flags),
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sizeof(env_new.flags), &flag);
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if (ret)
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goto done;
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puts("done\n");
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gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
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printf("Valid environment: %d\n", (int)gd->env_valid);
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done:
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if (saved_buffer)
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free(saved_buffer);
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return ret;
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}
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#endif /* CMD_SAVEENV */
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static int env_sf_load(void)
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{
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int ret;
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int read1_fail, read2_fail;
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env_t *tmp_env1, *tmp_env2;
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tmp_env1 = (env_t *)memalign(ARCH_DMA_MINALIGN,
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CONFIG_ENV_SIZE);
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tmp_env2 = (env_t *)memalign(ARCH_DMA_MINALIGN,
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CONFIG_ENV_SIZE);
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if (!tmp_env1 || !tmp_env2) {
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env_set_default("malloc() failed", 0);
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ret = -EIO;
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goto out;
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}
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ret = setup_flash_device();
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if (ret)
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goto out;
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read1_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
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CONFIG_ENV_SIZE, tmp_env1);
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read2_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
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CONFIG_ENV_SIZE, tmp_env2);
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ret = env_import_redund((char *)tmp_env1, read1_fail, (char *)tmp_env2,
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read2_fail);
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spi_flash_free(env_flash);
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env_flash = NULL;
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out:
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free(tmp_env1);
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free(tmp_env2);
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return ret;
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}
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#else
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#ifdef CMD_SAVEENV
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static int env_sf_save(void)
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{
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u32 saved_size, saved_offset, sector;
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char *saved_buffer = NULL;
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int ret = 1;
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env_t env_new;
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ret = setup_flash_device();
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if (ret)
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return ret;
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/* Is the sector larger than the env (i.e. embedded) */
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if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
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saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
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saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE;
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saved_buffer = malloc(saved_size);
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if (!saved_buffer)
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goto done;
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ret = spi_flash_read(env_flash, saved_offset,
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saved_size, saved_buffer);
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if (ret)
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goto done;
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}
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ret = env_export(&env_new);
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if (ret)
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goto done;
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sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);
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puts("Erasing SPI flash...");
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ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET,
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sector * CONFIG_ENV_SECT_SIZE);
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if (ret)
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goto done;
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puts("Writing to SPI flash...");
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ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET,
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CONFIG_ENV_SIZE, &env_new);
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if (ret)
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goto done;
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if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
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ret = spi_flash_write(env_flash, saved_offset,
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saved_size, saved_buffer);
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if (ret)
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goto done;
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}
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ret = 0;
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puts("done\n");
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done:
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if (saved_buffer)
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free(saved_buffer);
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return ret;
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}
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#endif /* CMD_SAVEENV */
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static int env_sf_load(void)
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{
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int ret;
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char *buf = NULL;
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buf = (char *)memalign(ARCH_DMA_MINALIGN, CONFIG_ENV_SIZE);
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if (!buf) {
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env_set_default("malloc() failed", 0);
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return -EIO;
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}
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ret = setup_flash_device();
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if (ret)
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goto out;
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ret = spi_flash_read(env_flash,
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CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
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if (ret) {
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env_set_default("spi_flash_read() failed", 0);
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goto err_read;
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}
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ret = env_import(buf, 1);
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if (!ret)
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gd->env_valid = ENV_VALID;
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err_read:
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spi_flash_free(env_flash);
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env_flash = NULL;
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out:
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free(buf);
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return ret;
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}
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#endif
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#if CONFIG_ENV_ADDR != 0x0
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__weak void *env_sf_get_env_addr(void)
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{
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return (void *)CONFIG_ENV_ADDR;
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}
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#endif
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#if defined(INITENV) && (CONFIG_ENV_ADDR != 0x0)
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static int env_sf_init(void)
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{
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env_t *env_ptr = (env_t *)env_sf_get_env_addr();
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if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
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gd->env_addr = (ulong)&(env_ptr->data);
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gd->env_valid = 1;
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} else {
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gd->env_addr = (ulong)&default_environment[0];
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gd->env_valid = 1;
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}
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return 0;
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}
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#endif
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U_BOOT_ENV_LOCATION(sf) = {
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.location = ENVL_SPI_FLASH,
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ENV_NAME("SPI Flash")
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.load = env_sf_load,
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#ifdef CMD_SAVEENV
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.save = env_save_ptr(env_sf_save),
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#endif
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#if defined(INITENV) && (CONFIG_ENV_ADDR != 0x0)
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.init = env_sf_init,
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#endif
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};
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