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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
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
51 if (mtd->writesize)
52
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
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