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 void 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 64 static int env_onenand_save(void) 65 { 66 env_t env_new; 67 int ret; 68 struct mtd_info *mtd = &onenand_mtd; 69 #ifdef CONFIG_ENV_ADDR_FLEX 70 struct onenand_chip *this = &onenand_chip; 71 #endif 72 loff_t env_addr = CONFIG_ENV_ADDR; 73 size_t retlen; 74 struct erase_info instr = { 75 .callback = NULL, 76 }; 77 78 ret = env_export(&env_new); 79 if (ret) 80 return ret; 81 82 instr.len = CONFIG_ENV_SIZE; 83 #ifdef CONFIG_ENV_ADDR_FLEX 84 if (FLEXONENAND(this)) { 85 env_addr = CONFIG_ENV_ADDR_FLEX; 86 instr.len = CONFIG_ENV_SIZE_FLEX; 87 instr.len <<= onenand_mtd.eraseregions[0].numblocks == 1 ? 88 1 : 0; 89 } 90 #endif 91 instr.addr = env_addr; 92 instr.mtd = mtd; 93 if (mtd_erase(mtd, &instr)) { 94 printf("OneNAND: erase failed at 0x%08llx\n", env_addr); 95 return 1; 96 } 97 98 if (mtd_write(mtd, env_addr, ONENAND_MAX_ENV_SIZE, &retlen, 99 (u_char *)&env_new)) { 100 printf("OneNAND: write failed at 0x%llx\n", instr.addr); 101 return 2; 102 } 103 104 return 0; 105 } 106 107 U_BOOT_ENV_LOCATION(onenand) = { 108 .location = ENVL_ONENAND, 109 ENV_NAME("OneNAND") 110 .load = env_onenand_load, 111 .save = env_save_ptr(env_onenand_save), 112 }; 113