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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 | }; |