1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * (C) Copyright 2010 DENX Software Engineering 4 * Wolfgang Denk <wd@denx.de> 5 * 6 * (C) Copyright 2005-2009 Samsung Electronics 7 * Kyungmin Park <kyungmin.park@samsung.com> 8 */ 9 10#include <common.h> 11#include <command.h> 12#include <env_internal.h> 13#include <asm/global_data.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 27DECLARE_GLOBAL_DATA_PTR; 28 29static 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, H_EXTERNAL); 60 if (!rc) 61 gd->env_valid = ENV_VALID; 62 63 return rc; 64} 65 66static 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 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 107U_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