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
27 DECLARE_GLOBAL_DATA_PTR;
28
env_onenand_load(void)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, H_EXTERNAL);
60 if (!rc)
61 gd->env_valid = ENV_VALID;
62
63 return rc;
64 }
65
env_onenand_save(void)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