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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>
Brandon Maier2339f012021-01-16 15:14:43 -060021#include <asm/global_data.h>
Simon Glasse6f6f9e2020-05-10 11:39:58 -060022#include <linux/stddef.h>
Maximilian Schwerin57210c72012-03-12 23:57:50 +000023
Simon Glass4415f1d2017-08-03 12:21:58 -060024#ifdef CONFIG_SPL_BUILD
25/* TODO(sjg@chromium.org): Figure out why this is needed */
26# if !defined(CONFIG_TARGET_AM335X_EVM) || defined(CONFIG_SPL_OS_BOOT)
27# define LOADENV
28# endif
29#else
30# define LOADENV
Simon Glass4415f1d2017-08-03 12:21:58 -060031#endif
32
Brandon Maier2339f012021-01-16 15:14:43 -060033DECLARE_GLOBAL_DATA_PTR;
34
David Woodhouse6731bef2020-06-19 23:07:17 +010035static char *env_fat_device_and_part(void)
36{
37#ifdef CONFIG_MMC
38 static char *part_str;
39
40 if (!part_str) {
41 part_str = CONFIG_ENV_FAT_DEVICE_AND_PART;
42 if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "mmc") && part_str[0] == ':') {
43 part_str = "0" CONFIG_ENV_FAT_DEVICE_AND_PART;
44 part_str[0] += mmc_get_env_dev();
45 }
46 }
47
48 return part_str;
49#else
50 return CONFIG_ENV_FAT_DEVICE_AND_PART;
51#endif
52}
53
Simon Glasse5bce242017-08-03 12:22:01 -060054static int env_fat_save(void)
Maximilian Schwerin57210c72012-03-12 23:57:50 +000055{
Alex Kiernancda87ec2018-02-07 20:01:54 +000056 env_t __aligned(ARCH_DMA_MINALIGN) env_new;
Simon Glass4101f682016-02-29 15:25:34 -070057 struct blk_desc *dev_desc = NULL;
Simon Glass05289792020-05-10 11:39:57 -060058 struct disk_partition info;
Brandon Maier2339f012021-01-16 15:14:43 -060059 const char *file = CONFIG_ENV_FAT_FILE;
Wu, Joshbe354c12014-06-24 17:31:02 +080060 int dev, part;
Igor Grinberg9aa90c12012-09-23 05:25:21 +000061 int err;
Suriyan Ramasami1ad0b982014-11-17 14:39:35 -080062 loff_t size;
Maximilian Schwerin57210c72012-03-12 23:57:50 +000063
Marek Vasut7ce15262014-03-05 19:59:50 +010064 err = env_export(&env_new);
65 if (err)
66 return err;
Maximilian Schwerin57210c72012-03-12 23:57:50 +000067
Tom Rini43ba3c52017-07-26 21:48:00 -040068 part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
David Woodhouse6731bef2020-06-19 23:07:17 +010069 env_fat_device_and_part(),
Wu, Joshbe354c12014-06-24 17:31:02 +080070 &dev_desc, &info, 1);
71 if (part < 0)
Maximilian Schwerin57210c72012-03-12 23:57:50 +000072 return 1;
Igor Grinberg9aa90c12012-09-23 05:25:21 +000073
Simon Glassbcce53d2016-02-29 15:25:51 -070074 dev = dev_desc->devnum;
Wu, Joshbe354c12014-06-24 17:31:02 +080075 if (fat_set_blk_dev(dev_desc, &info) != 0) {
Maxime Ripardd0816da2018-01-23 21:16:55 +010076 /*
77 * This printf is embedded in the messages from env_save that
78 * will calling it. The missing \n is intentional.
79 */
Peter Robinsonf6f27be2022-01-02 11:38:35 +000080 printf("Unable to use %s %d:%d... \n",
Tom Rini43ba3c52017-07-26 21:48:00 -040081 CONFIG_ENV_FAT_INTERFACE, dev, part);
Maximilian Schwerin57210c72012-03-12 23:57:50 +000082 return 1;
83 }
84
Brandon Maier2339f012021-01-16 15:14:43 -060085#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
86 if (gd->env_valid == ENV_VALID)
87 file = CONFIG_ENV_FAT_FILE_REDUND;
88#endif
89
90 err = file_fat_write(file, (void *)&env_new, 0, sizeof(env_t), &size);
Igor Grinberg9aa90c12012-09-23 05:25:21 +000091 if (err == -1) {
Maxime Ripardd0816da2018-01-23 21:16:55 +010092 /*
93 * This printf is embedded in the messages from env_save that
94 * will calling it. The missing \n is intentional.
95 */
Peter Robinsonf6f27be2022-01-02 11:38:35 +000096 printf("Unable to write \"%s\" from %s%d:%d... \n",
Brandon Maier2339f012021-01-16 15:14:43 -060097 file, CONFIG_ENV_FAT_INTERFACE, dev, part);
Maximilian Schwerin57210c72012-03-12 23:57:50 +000098 return 1;
99 }
100
Brandon Maier2339f012021-01-16 15:14:43 -0600101#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
102 gd->env_valid = (gd->env_valid == ENV_REDUND) ? ENV_VALID : ENV_REDUND;
103#endif
104
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000105 return 0;
106}
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000107
Simon Glass4415f1d2017-08-03 12:21:58 -0600108#ifdef LOADENV
Simon Glassc5951992017-08-03 12:22:17 -0600109static int env_fat_load(void)
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000110{
Brandon Maier2339f012021-01-16 15:14:43 -0600111 ALLOC_CACHE_ALIGN_BUFFER(char, buf1, CONFIG_ENV_SIZE);
112#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
113 ALLOC_CACHE_ALIGN_BUFFER(char, buf2, CONFIG_ENV_SIZE);
114 int err2;
115#endif
Simon Glass4101f682016-02-29 15:25:34 -0700116 struct blk_desc *dev_desc = NULL;
Simon Glass05289792020-05-10 11:39:57 -0600117 struct disk_partition info;
Wu, Joshbe354c12014-06-24 17:31:02 +0800118 int dev, part;
Brandon Maier2339f012021-01-16 15:14:43 -0600119 int err1;
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000120
Heinrich Schuchardt95058fb2018-04-14 15:41:00 +0200121#ifdef CONFIG_MMC
Faiz Abbas26862b42018-02-12 19:24:31 +0530122 if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "mmc"))
123 mmc_initialize(NULL);
Heinrich Schuchardt95058fb2018-04-14 15:41:00 +0200124#endif
Faiz Abbas26862b42018-02-12 19:24:31 +0530125
Tom Rini43ba3c52017-07-26 21:48:00 -0400126 part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
David Woodhouse6731bef2020-06-19 23:07:17 +0100127 env_fat_device_and_part(),
Wu, Joshbe354c12014-06-24 17:31:02 +0800128 &dev_desc, &info, 1);
129 if (part < 0)
130 goto err_env_relocate;
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000131
Simon Glassbcce53d2016-02-29 15:25:51 -0700132 dev = dev_desc->devnum;
Wu, Joshbe354c12014-06-24 17:31:02 +0800133 if (fat_set_blk_dev(dev_desc, &info) != 0) {
Maxime Ripardd0816da2018-01-23 21:16:55 +0100134 /*
135 * This printf is embedded in the messages from env_save that
136 * will calling it. The missing \n is intentional.
137 */
Peter Robinsonf6f27be2022-01-02 11:38:35 +0000138 printf("Unable to use %s %d:%d... \n",
Tom Rini43ba3c52017-07-26 21:48:00 -0400139 CONFIG_ENV_FAT_INTERFACE, dev, part);
Wu, Joshbe354c12014-06-24 17:31:02 +0800140 goto err_env_relocate;
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000141 }
142
Brandon Maier2339f012021-01-16 15:14:43 -0600143 err1 = file_fat_read(CONFIG_ENV_FAT_FILE, buf1, CONFIG_ENV_SIZE);
144#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
145 err2 = file_fat_read(CONFIG_ENV_FAT_FILE_REDUND, buf2, CONFIG_ENV_SIZE);
146
147 err1 = (err1 >= 0) ? 0 : -1;
148 err2 = (err2 >= 0) ? 0 : -1;
149 return env_import_redund(buf1, err1, buf2, err2, H_EXTERNAL);
150#else
151 if (err1 < 0) {
Maxime Ripardd0816da2018-01-23 21:16:55 +0100152 /*
153 * This printf is embedded in the messages from env_save that
154 * will calling it. The missing \n is intentional.
155 */
Peter Robinsonf6f27be2022-01-02 11:38:35 +0000156 printf("Unable to read \"%s\" from %s%d:%d... \n",
Tom Rini43ba3c52017-07-26 21:48:00 -0400157 CONFIG_ENV_FAT_FILE, CONFIG_ENV_FAT_INTERFACE, dev, part);
Wu, Joshbe354c12014-06-24 17:31:02 +0800158 goto err_env_relocate;
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000159 }
160
Brandon Maier2339f012021-01-16 15:14:43 -0600161 return env_import(buf1, 1, H_EXTERNAL);
162#endif
Wu, Joshbe354c12014-06-24 17:31:02 +0800163
164err_env_relocate:
Simon Glass0ac7d722019-08-01 09:47:00 -0600165 env_set_default(NULL, 0);
Simon Glassc5951992017-08-03 12:22:17 -0600166
167 return -EIO;
Maximilian Schwerin57210c72012-03-12 23:57:50 +0000168}
Simon Glass4415f1d2017-08-03 12:21:58 -0600169#endif /* LOADENV */
170
171U_BOOT_ENV_LOCATION(fat) = {
172 .location = ENVL_FAT,
Simon Glassac358be2017-08-03 12:22:03 -0600173 ENV_NAME("FAT")
Simon Glass4415f1d2017-08-03 12:21:58 -0600174#ifdef LOADENV
Simon Glasse5bce242017-08-03 12:22:01 -0600175 .load = env_fat_load,
Simon Glass4415f1d2017-08-03 12:21:58 -0600176#endif
Rasmus Villemoes3908bc92020-02-19 09:47:41 +0000177 .save = ENV_SAVE_PTR(env_fat_save),
Simon Glass4415f1d2017-08-03 12:21:58 -0600178};