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Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Stuart Longlandfd1000b2016-02-23 15:51:26 +10002/*
3 * (c) Copyright 2016 by VRT Technology
4 *
5 * Author:
6 * Stuart Longland <stuartl@vrt.com.au>
7 *
8 * Based on FAT environment driver
9 * (c) Copyright 2011 by Tigris Elektronik GmbH
10 *
11 * Author:
12 * Maximilian Schwerin <mvs@tigris.de>
13 *
14 * and EXT4 filesystem implementation
15 * (C) Copyright 2011 - 2012 Samsung Electronics
16 * EXT4 filesystem implementation in Uboot by
17 * Uma Shankar <uma.shankar@samsung.com>
18 * Manjunatha C Achar <a.manjunatha@samsung.com>
Stuart Longlandfd1000b2016-02-23 15:51:26 +100019 */
20
21#include <common.h>
Simon Glasse6f6f9e2020-05-10 11:39:58 -060022#include <part.h>
Stuart Longlandfd1000b2016-02-23 15:51:26 +100023
24#include <command.h>
Simon Glass0ac7d722019-08-01 09:47:00 -060025#include <env.h>
Simon Glassf3998fd2019-08-02 09:44:25 -060026#include <env_internal.h>
Stuart Longlandfd1000b2016-02-23 15:51:26 +100027#include <linux/stddef.h>
28#include <malloc.h>
Andrej Rosanobd62e242016-06-21 17:54:25 +020029#include <memalign.h>
Stuart Longlandfd1000b2016-02-23 15:51:26 +100030#include <search.h>
31#include <errno.h>
32#include <ext4fs.h>
33#include <mmc.h>
Simon Glass401d1c42020-10-30 21:38:53 -060034#include <asm/global_data.h>
Stuart Longlandfd1000b2016-02-23 15:51:26 +100035
Patrick Delaunay286fee52020-07-28 11:51:15 +020036DECLARE_GLOBAL_DATA_PTR;
37
Patrice Chotardd319edc2019-01-17 14:45:26 +010038__weak const char *env_ext4_get_intf(void)
39{
40 return (const char *)CONFIG_ENV_EXT4_INTERFACE;
41}
42
43__weak const char *env_ext4_get_dev_part(void)
44{
David Woodhouseb0493bb2020-08-04 10:05:47 +010045#ifdef CONFIG_MMC
46 static char *part_str;
47
48 if (!part_str) {
49 part_str = CONFIG_ENV_EXT4_DEVICE_AND_PART;
50 if (!strcmp(CONFIG_ENV_EXT4_INTERFACE, "mmc") && part_str[0] == ':') {
51 part_str = "0" CONFIG_ENV_EXT4_DEVICE_AND_PART;
52 part_str[0] += mmc_get_env_dev();
53 }
54 }
55
56 return part_str;
57#else
Patrice Chotardd319edc2019-01-17 14:45:26 +010058 return (const char *)CONFIG_ENV_EXT4_DEVICE_AND_PART;
David Woodhouseb0493bb2020-08-04 10:05:47 +010059#endif
Patrice Chotardd319edc2019-01-17 14:45:26 +010060}
61
Patrick Delaunayf6de0472020-07-28 11:51:25 +020062static int env_ext4_save_buffer(env_t *env_new)
Stuart Longlandfd1000b2016-02-23 15:51:26 +100063{
Andrej Rosanobd62e242016-06-21 17:54:25 +020064 struct blk_desc *dev_desc = NULL;
Simon Glass05289792020-05-10 11:39:57 -060065 struct disk_partition info;
Stuart Longlandfd1000b2016-02-23 15:51:26 +100066 int dev, part;
67 int err;
Patrice Chotardd319edc2019-01-17 14:45:26 +010068 const char *ifname = env_ext4_get_intf();
69 const char *dev_and_part = env_ext4_get_dev_part();
Stuart Longlandfd1000b2016-02-23 15:51:26 +100070
Patrice Chotardd319edc2019-01-17 14:45:26 +010071 part = blk_get_device_part_str(ifname, dev_and_part,
Jorge Ramirez-Ortiz1087a792018-01-10 11:33:48 +010072 &dev_desc, &info, 1);
Stuart Longlandfd1000b2016-02-23 15:51:26 +100073 if (part < 0)
74 return 1;
75
Andrej Rosanobd62e242016-06-21 17:54:25 +020076 dev = dev_desc->devnum;
Stuart Longlandfd1000b2016-02-23 15:51:26 +100077 ext4fs_set_blk_dev(dev_desc, &info);
78
79 if (!ext4fs_mount(info.size)) {
80 printf("\n** Unable to use %s %s for saveenv **\n",
Patrice Chotardd319edc2019-01-17 14:45:26 +010081 ifname, dev_and_part);
Stuart Longlandfd1000b2016-02-23 15:51:26 +100082 return 1;
83 }
84
Patrick Delaunayf6de0472020-07-28 11:51:25 +020085 err = ext4fs_write(CONFIG_ENV_EXT4_FILE, (void *)env_new,
Jean-Jacques Hiblot5efc0682019-02-13 12:15:25 +010086 sizeof(env_t), FILETYPE_REG);
Stuart Longlandfd1000b2016-02-23 15:51:26 +100087 ext4fs_close();
88
89 if (err == -1) {
90 printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
Patrice Chotardd319edc2019-01-17 14:45:26 +010091 CONFIG_ENV_EXT4_FILE, ifname, dev, part);
Stuart Longlandfd1000b2016-02-23 15:51:26 +100092 return 1;
93 }
94
Patrick Delaunayf6de0472020-07-28 11:51:25 +020095 return 0;
96}
97
98static int env_ext4_save(void)
99{
100 env_t env_new;
101 int err;
102
103 err = env_export(&env_new);
104 if (err)
105 return err;
106
107 err = env_ext4_save_buffer(&env_new);
108 if (err)
109 return err;
110
111 gd->env_valid = ENV_VALID;
Stuart Longlandfd1000b2016-02-23 15:51:26 +1000112 puts("done\n");
Patrick Delaunayf6de0472020-07-28 11:51:25 +0200113
Stuart Longlandfd1000b2016-02-23 15:51:26 +1000114 return 0;
115}
Stuart Longlandfd1000b2016-02-23 15:51:26 +1000116
Patrick Delaunay0718f742020-07-28 11:51:26 +0200117static int env_ext4_erase(void)
118{
119 env_t env_new;
120 int err;
121
122 memset(&env_new, 0, sizeof(env_t));
123
124 err = env_ext4_save_buffer(&env_new);
125 if (err)
126 return err;
127
128 gd->env_valid = ENV_INVALID;
129 puts("done\n");
130
131 return 0;
132}
133
Simon Glassc5951992017-08-03 12:22:17 -0600134static int env_ext4_load(void)
Stuart Longlandfd1000b2016-02-23 15:51:26 +1000135{
136 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
Andrej Rosanobd62e242016-06-21 17:54:25 +0200137 struct blk_desc *dev_desc = NULL;
Simon Glass05289792020-05-10 11:39:57 -0600138 struct disk_partition info;
Stuart Longlandfd1000b2016-02-23 15:51:26 +1000139 int dev, part;
140 int err;
Andrej Rosanobd62e242016-06-21 17:54:25 +0200141 loff_t off;
Patrice Chotardd319edc2019-01-17 14:45:26 +0100142 const char *ifname = env_ext4_get_intf();
143 const char *dev_and_part = env_ext4_get_dev_part();
Stuart Longlandfd1000b2016-02-23 15:51:26 +1000144
Heinrich Schuchardt95058fb2018-04-14 15:41:00 +0200145#ifdef CONFIG_MMC
Patrice Chotardd319edc2019-01-17 14:45:26 +0100146 if (!strcmp(ifname, "mmc"))
Faiz Abbas26862b42018-02-12 19:24:31 +0530147 mmc_initialize(NULL);
Heinrich Schuchardt95058fb2018-04-14 15:41:00 +0200148#endif
Faiz Abbas26862b42018-02-12 19:24:31 +0530149
Patrice Chotardd319edc2019-01-17 14:45:26 +0100150 part = blk_get_device_part_str(ifname, dev_and_part,
Jorge Ramirez-Ortiz1087a792018-01-10 11:33:48 +0100151 &dev_desc, &info, 1);
Stuart Longlandfd1000b2016-02-23 15:51:26 +1000152 if (part < 0)
153 goto err_env_relocate;
154
Andrej Rosanobd62e242016-06-21 17:54:25 +0200155 dev = dev_desc->devnum;
Stuart Longlandfd1000b2016-02-23 15:51:26 +1000156 ext4fs_set_blk_dev(dev_desc, &info);
157
158 if (!ext4fs_mount(info.size)) {
159 printf("\n** Unable to use %s %s for loading the env **\n",
Patrice Chotardd319edc2019-01-17 14:45:26 +0100160 ifname, dev_and_part);
Stuart Longlandfd1000b2016-02-23 15:51:26 +1000161 goto err_env_relocate;
162 }
163
Jorge Ramirez-Ortiz1087a792018-01-10 11:33:48 +0100164 err = ext4_read_file(CONFIG_ENV_EXT4_FILE, buf, 0, CONFIG_ENV_SIZE,
165 &off);
Stuart Longlandfd1000b2016-02-23 15:51:26 +1000166 ext4fs_close();
167
168 if (err == -1) {
169 printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
Patrice Chotardd319edc2019-01-17 14:45:26 +0100170 CONFIG_ENV_EXT4_FILE, ifname, dev, part);
Stuart Longlandfd1000b2016-02-23 15:51:26 +1000171 goto err_env_relocate;
172 }
173
Marek Vasut890feec2020-07-07 20:51:35 +0200174 err = env_import(buf, 1, H_EXTERNAL);
Patrick Delaunay286fee52020-07-28 11:51:15 +0200175 if (!err)
176 gd->env_valid = ENV_VALID;
177
178 return err;
Stuart Longlandfd1000b2016-02-23 15:51:26 +1000179
180err_env_relocate:
Simon Glass0ac7d722019-08-01 09:47:00 -0600181 env_set_default(NULL, 0);
Simon Glassc5951992017-08-03 12:22:17 -0600182
183 return -EIO;
Stuart Longlandfd1000b2016-02-23 15:51:26 +1000184}
Simon Glass4415f1d2017-08-03 12:21:58 -0600185
186U_BOOT_ENV_LOCATION(ext4) = {
187 .location = ENVL_EXT4,
Simon Glassac358be2017-08-03 12:22:03 -0600188 ENV_NAME("EXT4")
Simon Glasse5bce242017-08-03 12:22:01 -0600189 .load = env_ext4_load,
Rasmus Villemoes1df96a72020-02-19 09:47:42 +0000190 .save = ENV_SAVE_PTR(env_ext4_save),
Patrick Delaunay0718f742020-07-28 11:51:26 +0200191 .erase = CONFIG_IS_ENABLED(CMD_ERASEENV) ? env_ext4_erase :
192 NULL,
Simon Glass4415f1d2017-08-03 12:21:58 -0600193};