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
26 DECLARE_GLOBAL_DATA_PTR;
27
env_onenand_load(void)28 static 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
env_onenand_save(void)65 static 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
106 U_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 };
112