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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 | /* * (C) Copyright 2004 * Jian Zhang, Texas Instruments, jzhang@ti.com. * (C) Copyright 2000-2004 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com> * Andreas Heppel <aheppel@sysgo.de> * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ /* #define DEBUG */ #include <common.h> #if defined(CFG_ENV_IS_IN_NAND) /* Environment is in Nand Flash */ #include <command.h> #include <environment.h> #include <linux/stddef.h> #include <malloc.h> #include <linux/mtd/nand.h> #if ((CONFIG_COMMANDS&(CFG_CMD_ENV|CFG_CMD_NAND)) == (CFG_CMD_ENV|CFG_CMD_NAND)) #define CMD_SAVEENV #endif #if defined(CFG_ENV_SIZE_REDUND) #error CFG_ENV_SIZE_REDUND not supported yet #endif #if defined(CFG_ENV_ADDR_REDUND) #error CFG_ENV_ADDR_REDUND and CFG_ENV_IS_IN_NAND not supported yet #endif #ifdef CONFIG_INFERNO #error CONFIG_INFERNO not supported yet #endif /* references to names in cmd_nand.c */ #define NANDRW_READ 0x01 #define NANDRW_WRITE 0x00 #define NANDRW_JFFS2 0x02 extern struct nand_chip nand_dev_desc[]; int nand_rw (struct nand_chip* nand, int cmd, size_t start, size_t len, size_t * retlen, u_char * buf); int nand_erase(struct nand_chip* nand, size_t ofs, size_t len, int clean); /* references to names in env_common.c */ extern uchar default_environment[]; extern int default_environment_size; char * env_name_spec = "NAND"; #ifdef ENV_IS_EMBEDDED extern uchar environment[]; env_t *env_ptr = (env_t *)(&environment[0]); #else /* ! ENV_IS_EMBEDDED */ env_t *env_ptr = 0; #endif /* ENV_IS_EMBEDDED */ /* local functions */ static void use_default(void); uchar env_get_char_spec (int index) { DECLARE_GLOBAL_DATA_PTR; return ( *((uchar *)(gd->env_addr + index)) ); } /* this is called before nand_init() * so we can't read Nand to validate env data. * Mark it OK for now. env_relocate() in env_common.c * will call our relocate function which will does * the real validation. */ int env_init(void) { DECLARE_GLOBAL_DATA_PTR; gd->env_addr = (ulong)&default_environment[0]; gd->env_valid = 1; return (0); } #ifdef CMD_SAVEENV int saveenv(void) { int total, ret = 0; puts ("Erasing Nand..."); if (nand_erase(nand_dev_desc + 0, CFG_ENV_OFFSET, CFG_ENV_SIZE, 0)) return 1; puts ("Writing to Nand... "); ret = nand_rw(nand_dev_desc + 0, NANDRW_WRITE | NANDRW_JFFS2, CFG_ENV_OFFSET, CFG_ENV_SIZE, &total, (u_char*)env_ptr); if (ret || total != CFG_ENV_SIZE) return 1; puts ("done\n"); return ret; } #endif /* CMD_SAVEENV */ void env_relocate_spec (void) { #if !defined(ENV_IS_EMBEDDED) int ret, total; ret = nand_rw(nand_dev_desc + 0, NANDRW_READ | NANDRW_JFFS2, CFG_ENV_OFFSET, CFG_ENV_SIZE, &total, (u_char*)env_ptr); if (ret || total != CFG_ENV_SIZE) return use_default(); if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc) return use_default(); #endif /* ! ENV_IS_EMBEDDED */ } static void use_default() { DECLARE_GLOBAL_DATA_PTR; puts ("*** Warning - bad CRC or NAND, using default environment\n\n"); if (default_environment_size > CFG_ENV_SIZE){ puts ("*** Error - default environment is too large\n\n"); return; } memset (env_ptr, 0, sizeof(env_t)); memcpy (env_ptr->data, default_environment, default_environment_size); env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE); gd->env_valid = 1; } #endif /* CFG_ENV_IS_IN_NAND */ |