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