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125d193c4f
Introduce env support for sata device. 1. Implement write_env/read_env/env_relocate_spec/saveenv/sata_get_env_dev 2. If want to enable this feature, define CONFIG_ENV_IS_IN_SATA, and define CONFIG_SYS_SATA_ENV_DEV or implement your own sata_get_ev_dev. Signed-off-by: Peng Fan <van.freenix@gmail.com> Cc: Simon Glass <sjg@chromium.org> Cc: Joe Hershberger <joe.hershberger@ni.com> Cc: Bin Meng <bmeng.cn@gmail.com> Cc: Stefan Roese <sr@denx.de> Cc: Heiko Schocher <hs@denx.de> Cc: Stuart Longland <stuartl@vrt.com.au> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Tom Rini <trini@konsulko.com> Reviewed-by: Tom Rini <trini@konsulko.com>
128 lines
2.5 KiB
C
128 lines
2.5 KiB
C
/*
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* (C) Copyright 2010-2016 Freescale Semiconductor, Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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/* #define DEBUG */
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#include <common.h>
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#include <command.h>
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#include <environment.h>
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#include <linux/stddef.h>
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#include <errno.h>
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#include <memalign.h>
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#include <sata.h>
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#include <search.h>
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#if defined(CONFIG_ENV_SIZE_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
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#error ENV REDUND not supported
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#endif
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#if !defined(CONFIG_ENV_OFFSET) || !defined(CONFIG_ENV_SIZE)
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#error CONFIG_ENV_OFFSET or CONFIG_ENV_SIZE not defined
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#endif
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char *env_name_spec = "SATA";
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DECLARE_GLOBAL_DATA_PTR;
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__weak int sata_get_env_dev(void)
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{
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return CONFIG_SYS_SATA_ENV_DEV;
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}
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int env_init(void)
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{
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/* use default */
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gd->env_addr = (ulong)&default_environment[0];
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gd->env_valid = 1;
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return 0;
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}
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#ifdef CONFIG_CMD_SAVEENV
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static inline int write_env(struct blk_desc *sata, unsigned long size,
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unsigned long offset, void *buffer)
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{
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uint blk_start, blk_cnt, n;
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blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
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blk_cnt = ALIGN(size, sata->blksz) / sata->blksz;
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n = blk_dwrite(sata, blk_start, blk_cnt, buffer);
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return (n == blk_cnt) ? 0 : -1;
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}
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int saveenv(void)
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{
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ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
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struct blk_desc *sata = NULL;
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int env_sata, ret;
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if (sata_initialize())
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return 1;
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env_sata = sata_get_env_dev();
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sata = sata_get_dev(env_sata);
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if (sata == NULL) {
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printf("Unknown SATA(%d) device for environment!\n",
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env_sata);
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return 1;
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}
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ret = env_export(env_new);
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if (ret)
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return 1;
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printf("Writing to SATA(%d)...", env_sata);
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if (write_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, &env_new)) {
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puts("failed\n");
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return 1;
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}
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puts("done\n");
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return 0;
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}
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#endif /* CONFIG_CMD_SAVEENV */
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static inline int read_env(struct blk_desc *sata, unsigned long size,
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unsigned long offset, void *buffer)
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{
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uint blk_start, blk_cnt, n;
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blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
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blk_cnt = ALIGN(size, sata->blksz) / sata->blksz;
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n = blk_dread(sata, blk_start, blk_cnt, buffer);
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return (n == blk_cnt) ? 0 : -1;
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}
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void env_relocate_spec(void)
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{
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ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
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struct blk_desc *sata = NULL;
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int env_sata;
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if (sata_initialize())
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return;
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env_sata = sata_get_env_dev();
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sata = sata_get_dev(env_sata);
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if (sata == NULL) {
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printf("Unknown SATA(%d) device for environment!\n",
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env_sata);
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return;
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}
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if (read_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, buf))
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return set_default_env(NULL);
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env_import(buf, 1);
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}
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