xref: /openbmc/u-boot/env/sata.c (revision 7f941868)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2010-2016 Freescale Semiconductor, Inc.
4  */
5 
6 /* #define DEBUG */
7 
8 #include <common.h>
9 
10 #include <command.h>
11 #include <environment.h>
12 #include <linux/stddef.h>
13 #include <errno.h>
14 #include <memalign.h>
15 #include <sata.h>
16 #include <search.h>
17 
18 #if defined(CONFIG_ENV_SIZE_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
19 #error ENV REDUND not supported
20 #endif
21 
22 #if !defined(CONFIG_ENV_OFFSET) || !defined(CONFIG_ENV_SIZE)
23 #error CONFIG_ENV_OFFSET or CONFIG_ENV_SIZE not defined
24 #endif
25 
sata_get_env_dev(void)26 __weak int sata_get_env_dev(void)
27 {
28 	return CONFIG_SYS_SATA_ENV_DEV;
29 }
30 
31 #ifdef CONFIG_CMD_SAVEENV
write_env(struct blk_desc * sata,unsigned long size,unsigned long offset,void * buffer)32 static inline int write_env(struct blk_desc *sata, unsigned long size,
33 			    unsigned long offset, void *buffer)
34 {
35 	uint blk_start, blk_cnt, n;
36 
37 	blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
38 	blk_cnt   = ALIGN(size, sata->blksz) / sata->blksz;
39 
40 	n = blk_dwrite(sata, blk_start, blk_cnt, buffer);
41 
42 	return (n == blk_cnt) ? 0 : -1;
43 }
44 
env_sata_save(void)45 static int env_sata_save(void)
46 {
47 	ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
48 	struct blk_desc *sata = NULL;
49 	int env_sata, ret;
50 
51 	if (sata_initialize())
52 		return 1;
53 
54 	env_sata = sata_get_env_dev();
55 
56 	sata = sata_get_dev(env_sata);
57 	if (sata == NULL) {
58 		printf("Unknown SATA(%d) device for environment!\n",
59 		       env_sata);
60 		return 1;
61 	}
62 
63 	ret = env_export(env_new);
64 	if (ret)
65 		return 1;
66 
67 	printf("Writing to SATA(%d)...", env_sata);
68 	if (write_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, (u_char *)env_new)) {
69 		puts("failed\n");
70 		return 1;
71 	}
72 
73 	puts("done\n");
74 	return 0;
75 }
76 #endif /* CONFIG_CMD_SAVEENV */
77 
read_env(struct blk_desc * sata,unsigned long size,unsigned long offset,void * buffer)78 static inline int read_env(struct blk_desc *sata, unsigned long size,
79 			   unsigned long offset, void *buffer)
80 {
81 	uint blk_start, blk_cnt, n;
82 
83 	blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
84 	blk_cnt   = ALIGN(size, sata->blksz) / sata->blksz;
85 
86 	n = blk_dread(sata, blk_start, blk_cnt, buffer);
87 
88 	return (n == blk_cnt) ? 0 : -1;
89 }
90 
env_sata_load(void)91 static void env_sata_load(void)
92 {
93 	ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
94 	struct blk_desc *sata = NULL;
95 	int env_sata;
96 
97 	if (sata_initialize())
98 		return -EIO;
99 
100 	env_sata = sata_get_env_dev();
101 
102 	sata = sata_get_dev(env_sata);
103 	if (sata == NULL) {
104 		printf("Unknown SATA(%d) device for environment!\n", env_sata);
105 		return -EIO;
106 	}
107 
108 	if (read_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, buf)) {
109 		set_default_env(NULL, 0);
110 		return -EIO;
111 	}
112 
113 	return env_import(buf, 1);
114 }
115 
116 U_BOOT_ENV_LOCATION(sata) = {
117 	.location	= ENVL_ESATA,
118 	ENV_NAME("SATA")
119 	.load		= env_sata_load,
120 	.save		= env_save_ptr(env_sata_save),
121 };
122