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Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Maximilian Schwerin57210c72012-03-12 23:57:50 +00002/*
3 * (c) Copyright 2011 by Tigris Elektronik GmbH
4 *
5 * Author:
6 * Maximilian Schwerin <mvs@tigris.de>
Maximilian Schwerin57210c72012-03-12 23:57:50 +00007 */
8
9#include <common.h>
Maximilian Schwerin57210c72012-03-12 23:57:50 +000010#include <command.h>
Simon Glass0ac7d722019-08-01 09:47:00 -060011#include <env.h>
Simon Glassf3998fd2019-08-02 09:44:25 -060012#include <env_internal.h>
Simon Glasse6f6f9e2020-05-10 11:39:58 -060013#include <part.h>
Maximilian Schwerin57210c72012-03-12 23:57:50 +000014#include <malloc.h>
Simon Glasscf92e052015-09-02 17:24:58 -060015#include <memalign.h>
Maximilian Schwerin57210c72012-03-12 23:57:50 +000016#include <search.h>
17#include <errno.h>
18#include <fat.h>
19#include <mmc.h>
Simon Glasse6f6f9e2020-05-10 11:39:58 -060020#include <asm/cache.h>
21#include <linux/stddef.h>
Maximilian Schwerin57210c72012-03-12 23:57:50 +000022
Simon Glass4415f1d2017-08-03 12:21:58 -060023#ifdef CONFIG_SPL_BUILD
24/* TODO(sjg@chromium.org): Figure out why this is needed */
25# if !defined(CONFIG_TARGET_AM335X_EVM) || defined(CONFIG_SPL_OS_BOOT)
26# define LOADENV
27# endif
28#else
29# define LOADENV
Simon Glass4415f1d2017-08-03 12:21:58 -060030#endif
31
David Woodhouse6731bef2020-06-19 23:07:17 +010032__weak int mmc_get_env_dev(void)
33{
34#ifdef CONFIG_SYS_MMC_ENV_DEV
35 return CONFIG_SYS_MMC_ENV_DEV;
36#else
37 return 0;
38#endif
39}
40
41static char *env_fat_device_and_part(void)
42{
43#ifdef CONFIG_MMC
44 static char *part_str;
45
46 if (!part_str) {
47 part_str = CONFIG_ENV_FAT_DEVICE_AND_PART;
48 if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "mmc") && part_str[0] == ':') {
49 part_str = "0" CONFIG_ENV_FAT_DEVICE_AND_PART;
50 part_str[0] += mmc_get_env_dev();
51 }
52 }
53
54 return part_str;
55#else
56 return CONFIG_ENV_FAT_DEVICE_AND_PART;
57#endif
58}
59
Simon Glasse5bce242017-08-03 12:22:01 -060060static int env_fat_save(void)
Maximilian Schwerin57210c72012-03-12 23:57:50 +000061{
Alex Kiernancda87ec2018-02-07 20:01:54 +000062 env_t __aligned(ARCH_DMA_MINALIGN) env_new;
Simon Glass4101f682016-02-29 15:25:34 -070063 struct blk_desc *dev_desc = NULL;
Simon Glass05289792020-05-10 11:39:57 -060064 struct disk_partition info;
Wu, Joshbe354c12014-06-24 17:31:02 +080065 int dev, part;
Igor Grinberg9aa90c12012-09-23 05:25:21 +000066 int err;
Suriyan Ramasami1ad0b982014-11-17 14:39:35 -080067 loff_t size;
Maximilian Schwerin57210c72012-03-12 23:57:50 +000068
Marek Vasut7ce15262014-03-05 19:59:50 +010069 err = env_export(&env_new);
70 if (err)
71 return err;
Maximilian Schwerin57210c72012-03-12 23:57:50 +000072
Tom Rini43ba3c52017-07-26 21:48:00 -040073 part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
David Woodhouse6731bef2020-06-19 23:07:17 +010074 env_fat_device_and_part(),
Wu, Joshbe354c12014-06-24 17:31:02 +080075 &dev_desc, &info, 1);
76 if (part < 0)
Maximilian Schwerin57210c72012-03-12 23:57:50 +000077 return 1;
Igor Grinberg9aa90c12012-09-23 05:25:21 +000078
Simon Glassbcce53d2016-02-29 15:25:51 -070079 dev = dev_desc->devnum;
Wu, Joshbe354c12014-06-24 17:31:02 +080080 if (fat_set_blk_dev(dev_desc, &info) != 0) {
Maxime Ripardd0816da2018-01-23 21:16:55 +010081 /*
82 * This printf is embedded in the messages from env_save that
83 * will calling it. The missing \n is intentional.
84 */
85 printf("Unable to use %s %d:%d... ",
Tom Rini43ba3c52017-07-26 21:48:00 -040086 CONFIG_ENV_FAT_INTERFACE, dev, part);
Maximilian Schwerin57210c72012-03-12 23:57:50 +000087 return 1;
88 }
89
Tom Rini43ba3c52017-07-26 21:48:00 -040090 err = file_fat_write(CONFIG_ENV_FAT_FILE, (void *)&env_new, 0, sizeof(env_t),
Suriyan Ramasami1ad0b982014-11-17 14:39:35 -080091 &size);
Igor Grinberg9aa90c12012-09-23 05:25:21 +000092 if (err == -1) {
Maxime Ripardd0816da2018-01-23 21:16:55 +010093 /*
94 * This printf is embedded in the messages from env_save that
95 * will calling it. The missing \n is intentional.
96 */
97 printf("Unable to write \"%s\" from %s%d:%d... ",
Tom Rini43ba3c52017-07-26 21:48:00 -040098 CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part);
Maximilian Schwerin57210c72012-03-12 23:57:50 +000099 return 1;
100 }
101
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000102 return 0;
103}
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000104
Simon Glass4415f1d2017-08-03 12:21:58 -0600105#ifdef LOADENV
Simon Glassc5951992017-08-03 12:22:17 -0600106static int env_fat_load(void)
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000107{
Tom Rini6d1966e2014-08-01 13:59:10 -0400108 ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
Simon Glass4101f682016-02-29 15:25:34 -0700109 struct blk_desc *dev_desc = NULL;
Simon Glass05289792020-05-10 11:39:57 -0600110 struct disk_partition info;
Wu, Joshbe354c12014-06-24 17:31:02 +0800111 int dev, part;
Igor Grinberg9aa90c12012-09-23 05:25:21 +0000112 int err;
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000113
Heinrich Schuchardt95058fb2018-04-14 15:41:00 +0200114#ifdef CONFIG_MMC
Faiz Abbas26862b42018-02-12 19:24:31 +0530115 if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "mmc"))
116 mmc_initialize(NULL);
Heinrich Schuchardt95058fb2018-04-14 15:41:00 +0200117#endif
Faiz Abbas26862b42018-02-12 19:24:31 +0530118
Tom Rini43ba3c52017-07-26 21:48:00 -0400119 part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
David Woodhouse6731bef2020-06-19 23:07:17 +0100120 env_fat_device_and_part(),
Wu, Joshbe354c12014-06-24 17:31:02 +0800121 &dev_desc, &info, 1);
122 if (part < 0)
123 goto err_env_relocate;
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000124
Simon Glassbcce53d2016-02-29 15:25:51 -0700125 dev = dev_desc->devnum;
Wu, Joshbe354c12014-06-24 17:31:02 +0800126 if (fat_set_blk_dev(dev_desc, &info) != 0) {
Maxime Ripardd0816da2018-01-23 21:16:55 +0100127 /*
128 * This printf is embedded in the messages from env_save that
129 * will calling it. The missing \n is intentional.
130 */
131 printf("Unable to use %s %d:%d... ",
Tom Rini43ba3c52017-07-26 21:48:00 -0400132 CONFIG_ENV_FAT_INTERFACE, dev, part);
Wu, Joshbe354c12014-06-24 17:31:02 +0800133 goto err_env_relocate;
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000134 }
135
Tom Rini43ba3c52017-07-26 21:48:00 -0400136 err = file_fat_read(CONFIG_ENV_FAT_FILE, buf, CONFIG_ENV_SIZE);
Igor Grinberg9aa90c12012-09-23 05:25:21 +0000137 if (err == -1) {
Maxime Ripardd0816da2018-01-23 21:16:55 +0100138 /*
139 * This printf is embedded in the messages from env_save that
140 * will calling it. The missing \n is intentional.
141 */
142 printf("Unable to read \"%s\" from %s%d:%d... ",
Tom Rini43ba3c52017-07-26 21:48:00 -0400143 CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part);
Wu, Joshbe354c12014-06-24 17:31:02 +0800144 goto err_env_relocate;
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000145 }
146
Marek Vasut890feec2020-07-07 20:51:35 +0200147 return env_import(buf, 1, H_EXTERNAL);
Wu, Joshbe354c12014-06-24 17:31:02 +0800148
149err_env_relocate:
Simon Glass0ac7d722019-08-01 09:47:00 -0600150 env_set_default(NULL, 0);
Simon Glassc5951992017-08-03 12:22:17 -0600151
152 return -EIO;
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000153}
Simon Glass4415f1d2017-08-03 12:21:58 -0600154#endif /* LOADENV */
155
156U_BOOT_ENV_LOCATION(fat) = {
157 .location = ENVL_FAT,
Simon Glassac358be2017-08-03 12:22:03 -0600158 ENV_NAME("FAT")
Simon Glass4415f1d2017-08-03 12:21:58 -0600159#ifdef LOADENV
Simon Glasse5bce242017-08-03 12:22:01 -0600160 .load = env_fat_load,
Simon Glass4415f1d2017-08-03 12:21:58 -0600161#endif
Rasmus Villemoes3908bc92020-02-19 09:47:41 +0000162 .save = ENV_SAVE_PTR(env_fat_save),
Simon Glass4415f1d2017-08-03 12:21:58 -0600163};