xref: /openbmc/u-boot/env/onenand.c (revision 1bad5e14)
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 <environment.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 
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);
59 	if (!rc)
60 		gd->env_valid = ENV_VALID;
61 
62 	return rc;
63 }
64 
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 		.callback	= NULL,
77 	};
78 
79 	ret = env_export(&env_new);
80 	if (ret)
81 		return ret;
82 
83 	instr.len = CONFIG_ENV_SIZE;
84 #ifdef CONFIG_ENV_ADDR_FLEX
85 	if (FLEXONENAND(this)) {
86 		env_addr = CONFIG_ENV_ADDR_FLEX;
87 		instr.len = CONFIG_ENV_SIZE_FLEX;
88 		instr.len <<= onenand_mtd.eraseregions[0].numblocks == 1 ?
89 				1 : 0;
90 	}
91 #endif
92 	instr.addr = env_addr;
93 	instr.mtd = mtd;
94 	if (mtd_erase(mtd, &instr)) {
95 		printf("OneNAND: erase failed at 0x%08llx\n", env_addr);
96 		return 1;
97 	}
98 
99 	if (mtd_write(mtd, env_addr, ONENAND_MAX_ENV_SIZE, &retlen,
100 			(u_char *)&env_new)) {
101 		printf("OneNAND: write failed at 0x%llx\n", instr.addr);
102 		return 2;
103 	}
104 
105 	return 0;
106 }
107 
108 U_BOOT_ENV_LOCATION(onenand) = {
109 	.location	= ENVL_ONENAND,
110 	ENV_NAME("OneNAND")
111 	.load		= env_onenand_load,
112 	.save		= env_save_ptr(env_onenand_save),
113 };
114