Merge tag 'signed-efi-next' of git://github.com/agraf/u-boot
[platform/kernel/u-boot.git] / env / onenand.c
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 };