upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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379 lines
7.9 KiB
379 lines
7.9 KiB
/*
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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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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.h>
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#include <environment.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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#ifndef CONFIG_ENV_SPI_BUS
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# define CONFIG_ENV_SPI_BUS CONFIG_SF_DEFAULT_BUS
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#endif
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#ifndef CONFIG_ENV_SPI_CS
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# define CONFIG_ENV_SPI_CS CONFIG_SF_DEFAULT_CS
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#endif
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#ifndef CONFIG_ENV_SPI_MAX_HZ
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# define CONFIG_ENV_SPI_MAX_HZ CONFIG_SF_DEFAULT_SPEED
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#endif
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#ifndef CONFIG_ENV_SPI_MODE
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# define CONFIG_ENV_SPI_MODE CONFIG_SF_DEFAULT_MODE
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#endif
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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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#define ACTIVE_FLAG 1
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#define OBSOLETE_FLAG 0
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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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0, 0, &new);
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if (ret) {
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set_default_env("!spi_flash_probe_bus_cs() failed");
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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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set_default_env("!spi_flash_probe() failed");
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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 = OBSOLETE_FLAG;
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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 = ACTIVE_FLAG;
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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 crc1_ok = 0, crc2_ok = 0;
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env_t *tmp_env1 = NULL;
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env_t *tmp_env2 = NULL;
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env_t *ep = NULL;
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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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set_default_env("!malloc() failed");
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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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ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
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CONFIG_ENV_SIZE, tmp_env1);
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if (ret) {
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set_default_env("!spi_flash_read() failed");
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goto err_read;
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}
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if (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc)
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crc1_ok = 1;
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ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
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CONFIG_ENV_SIZE, tmp_env2);
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if (!ret) {
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if (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc)
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crc2_ok = 1;
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}
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if (!crc1_ok && !crc2_ok) {
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set_default_env("!bad CRC");
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ret = -EIO;
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goto err_read;
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} else if (crc1_ok && !crc2_ok) {
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gd->env_valid = ENV_VALID;
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} else if (!crc1_ok && crc2_ok) {
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gd->env_valid = ENV_REDUND;
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} else if (tmp_env1->flags == ACTIVE_FLAG &&
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tmp_env2->flags == OBSOLETE_FLAG) {
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gd->env_valid = ENV_VALID;
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} else if (tmp_env1->flags == OBSOLETE_FLAG &&
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tmp_env2->flags == ACTIVE_FLAG) {
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gd->env_valid = ENV_REDUND;
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} else if (tmp_env1->flags == tmp_env2->flags) {
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gd->env_valid = ENV_VALID;
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} else if (tmp_env1->flags == 0xFF) {
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gd->env_valid = ENV_VALID;
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} else if (tmp_env2->flags == 0xFF) {
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gd->env_valid = ENV_REDUND;
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} else {
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/*
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* this differs from code in env_flash.c, but I think a sane
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* default path is desirable.
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*/
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gd->env_valid = ENV_VALID;
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}
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if (gd->env_valid == ENV_VALID)
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ep = tmp_env1;
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else
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ep = tmp_env2;
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ret = env_import((char *)ep, 0);
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if (!ret) {
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pr_err("Cannot import environment: errno = %d\n", errno);
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set_default_env("!env_import failed");
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}
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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(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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set_default_env("!malloc() failed");
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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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set_default_env("!spi_flash_read() failed");
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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 defined(INITENV) && defined(CONFIG_ENV_ADDR)
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static int env_sf_init(void)
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{
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env_t *env_ptr = (env_t *)(CONFIG_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) && defined(CONFIG_ENV_ADDR)
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.init = env_sf_init,
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#endif
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};
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