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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 | // SPDX-License-Identifier: GPL-2.0+ /* * (C) Copyright 2008-2011 Freescale Semiconductor, Inc. */ /* #define DEBUG */ #include <asm/global_data.h> #include <command.h> #include <env.h> #include <env_internal.h> #include <fdtdec.h> #include <linux/stddef.h> #include <malloc.h> #include <memalign.h> #include <part.h> #include <search.h> #include <scsi.h> #include <errno.h> #include <dm/ofnode.h> DECLARE_GLOBAL_DATA_PTR; static env_t envbuf; struct env_scsi_info { struct blk_desc *blk; struct disk_partition part; int count; }; static struct env_scsi_info env_part; static inline struct env_scsi_info *env_scsi_get_part(void) { struct env_scsi_info *ep = &env_part; if (scsi_get_blk_by_uuid(CONFIG_SCSI_ENV_PART_UUID, &ep->blk, &ep->part)) return NULL; ep->count = CONFIG_ENV_SIZE / ep->part.blksz; return ep; } static int env_scsi_save(void) { struct env_scsi_info *ep = env_scsi_get_part(); int ret; if (!ep) return -ENOENT; ret = env_export(&envbuf); if (ret) return ret; if (blk_dwrite(ep->blk, ep->part.start, ep->count, &envbuf) != ep->count) return -EIO; return 0; } static int env_scsi_erase(void) { struct env_scsi_info *ep = env_scsi_get_part(); if (!ep) return -ENOENT; return (int)blk_derase(ep->blk, ep->part.start, ep->count); } #if defined(ENV_IS_EMBEDDED) static int env_scsi_load(void) { return 0; } #else static int env_scsi_load(void) { struct env_scsi_info *ep = env_scsi_get_part(); int ret; if (!ep) { env_set_default(CONFIG_SCSI_ENV_PART_UUID " partition not found", 0); return -ENOENT; } if (blk_dread(ep->blk, ep->part.start, ep->count, &envbuf) != ep->count) { env_set_default(CONFIG_SCSI_ENV_PART_UUID " partition read failed", 0); return -EIO; } ret = env_import((char *)&envbuf, 1, H_EXTERNAL); if (ret) { debug("ENV import failed\n"); env_set_default("Cannot load environment", 0); } else { gd->env_addr = (ulong)envbuf.data; } return ret; } #endif U_BOOT_ENV_LOCATION(scsi) = { .location = ENVL_SCSI, ENV_NAME("SCSI") .load = env_scsi_load, #if defined(CONFIG_CMD_SAVEENV) && !defined(CONFIG_XPL_BUILD) .save = env_save_ptr(env_scsi_save), .erase = ENV_ERASE_PTR(env_scsi_erase), #endif }; |