1 /* 2 * (C) Copyright 2010 DENX Software Engineering 3 * Wolfgang Denk <wd@denx.de> 4 * 5 * (C) Copyright 2005-2009 Samsung Electronics 6 * Kyungmin Park <kyungmin.park@samsung.com> 7 * 8 * SPDX-License-Identifier: GPL-2.0+ 9 */ 10 11 #include <common.h> 12 #include <command.h> 13 #include <environment.h> 14 #include <linux/stddef.h> 15 #include <malloc.h> 16 #include <search.h> 17 #include <errno.h> 18 #include <onenand_uboot.h> 19 20 #include <linux/compat.h> 21 #include <linux/mtd/mtd.h> 22 #include <linux/mtd/onenand.h> 23 24 #define ONENAND_MAX_ENV_SIZE CONFIG_ENV_SIZE 25 #define ONENAND_ENV_SIZE(mtd) (ONENAND_MAX_ENV_SIZE - ENV_HEADER_SIZE) 26 27 DECLARE_GLOBAL_DATA_PTR; 28 29 static int env_onenand_load(void) 30 { 31 struct mtd_info *mtd = &onenand_mtd; 32 #ifdef CONFIG_ENV_ADDR_FLEX 33 struct onenand_chip *this = &onenand_chip; 34 #endif 35 int rc; 36 size_t retlen; 37 #ifdef ENV_IS_EMBEDDED 38 char *buf = (char *)&environment; 39 #else 40 loff_t env_addr = CONFIG_ENV_ADDR; 41 char onenand_env[ONENAND_MAX_ENV_SIZE]; 42 char *buf = (char *)&onenand_env[0]; 43 #endif /* ENV_IS_EMBEDDED */ 44 45 #ifndef ENV_IS_EMBEDDED 46 # ifdef CONFIG_ENV_ADDR_FLEX 47 if (FLEXONENAND(this)) 48 env_addr = CONFIG_ENV_ADDR_FLEX; 49 # endif 50 /* Check OneNAND exist */ 51 if (mtd->writesize) 52 /* Ignore read fail */ 53 mtd_read(mtd, env_addr, ONENAND_MAX_ENV_SIZE, 54 &retlen, (u_char *)buf); 55 else 56 mtd->writesize = MAX_ONENAND_PAGESIZE; 57 #endif /* !ENV_IS_EMBEDDED */ 58 59 rc = env_import(buf, 1); 60 if (rc) 61 gd->env_valid = ENV_VALID; 62 63 return rc ? 0 : -EIO; 64 } 65 66 static int env_onenand_save(void) 67 { 68 env_t env_new; 69 int ret; 70 struct mtd_info *mtd = &onenand_mtd; 71 #ifdef CONFIG_ENV_ADDR_FLEX 72 struct onenand_chip *this = &onenand_chip; 73 #endif 74 loff_t env_addr = CONFIG_ENV_ADDR; 75 size_t retlen; 76 struct erase_info instr = { 77 .callback = NULL, 78 }; 79 80 ret = env_export(&env_new); 81 if (ret) 82 return ret; 83 84 instr.len = CONFIG_ENV_SIZE; 85 #ifdef CONFIG_ENV_ADDR_FLEX 86 if (FLEXONENAND(this)) { 87 env_addr = CONFIG_ENV_ADDR_FLEX; 88 instr.len = CONFIG_ENV_SIZE_FLEX; 89 instr.len <<= onenand_mtd.eraseregions[0].numblocks == 1 ? 90 1 : 0; 91 } 92 #endif 93 instr.addr = env_addr; 94 instr.mtd = mtd; 95 if (mtd_erase(mtd, &instr)) { 96 printf("OneNAND: erase failed at 0x%08llx\n", env_addr); 97 return 1; 98 } 99 100 if (mtd_write(mtd, env_addr, ONENAND_MAX_ENV_SIZE, &retlen, 101 (u_char *)&env_new)) { 102 printf("OneNAND: write failed at 0x%llx\n", instr.addr); 103 return 2; 104 } 105 106 return 0; 107 } 108 109 U_BOOT_ENV_LOCATION(onenand) = { 110 .location = ENVL_ONENAND, 111 ENV_NAME("OneNAND") 112 .load = env_onenand_load, 113 .save = env_save_ptr(env_onenand_save), 114 }; 115