xref: /openbmc/u-boot/common/spl/spl_mmc.c (revision 04735e9c5578dd4f3584be5454b9779e8e5c2af9)
1 /*
2  * (C) Copyright 2010
3  * Texas Instruments, <www.ti.com>
4  *
5  * Aneesh V <aneesh@ti.com>
6  *
7  * See file CREDITS for list of people who contributed to this
8  * project.
9  *
10  * This program is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU General Public License as
12  * published by the Free Software Foundation; either version 2 of
13  * the License, or (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23  * MA 02111-1307 USA
24  */
25 #include <common.h>
26 #include <spl.h>
27 #include <asm/u-boot.h>
28 #include <asm/utils.h>
29 #include <mmc.h>
30 #include <fat.h>
31 #include <version.h>
32 
33 DECLARE_GLOBAL_DATA_PTR;
34 
35 static int mmc_load_image_raw(struct mmc *mmc, unsigned long sector)
36 {
37 	unsigned long err;
38 	u32 image_size_sectors;
39 	struct image_header *header;
40 
41 	header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
42 						sizeof(struct image_header));
43 
44 	/* read image header to find the image size & load address */
45 	err = mmc->block_dev.block_read(0, sector, 1, header);
46 	if (err == 0)
47 		goto end;
48 
49 	spl_parse_image_header(header);
50 
51 	/* convert size to sectors - round up */
52 	image_size_sectors = (spl_image.size + mmc->read_bl_len - 1) /
53 				mmc->read_bl_len;
54 
55 	/* Read the header too to avoid extra memcpy */
56 	err = mmc->block_dev.block_read(0, sector, image_size_sectors,
57 					(void *)spl_image.load_addr);
58 
59 end:
60 	if (err == 0)
61 		printf("spl: mmc blk read err - %lu\n", err);
62 
63 	return (err == 0);
64 }
65 
66 #ifdef CONFIG_SPL_OS_BOOT
67 static int mmc_load_image_raw_os(struct mmc *mmc)
68 {
69 	if (!mmc->block_dev.block_read(0,
70 				       CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR,
71 				       CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS,
72 				       (void *)CONFIG_SYS_SPL_ARGS_ADDR)) {
73 		printf("mmc args blk read error\n");
74 		return -1;
75 	}
76 
77 	return mmc_load_image_raw(mmc, CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR);
78 }
79 #endif
80 
81 #ifdef CONFIG_SPL_FAT_SUPPORT
82 static int mmc_load_image_fat(struct mmc *mmc, const char *filename)
83 {
84 	int err;
85 	struct image_header *header;
86 
87 	header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
88 						sizeof(struct image_header));
89 
90 	err = file_fat_read(filename, header, sizeof(struct image_header));
91 	if (err <= 0)
92 		goto end;
93 
94 	spl_parse_image_header(header);
95 
96 	err = file_fat_read(filename, (u8 *)spl_image.load_addr, 0);
97 
98 end:
99 	if (err <= 0)
100 		printf("spl: error reading image %s, err - %d\n",
101 		       filename, err);
102 
103 	return (err <= 0);
104 }
105 
106 #ifdef CONFIG_SPL_OS_BOOT
107 static int mmc_load_image_fat_os(struct mmc *mmc)
108 {
109 	int err;
110 
111 	err = file_fat_read(CONFIG_SPL_FAT_LOAD_ARGS_NAME,
112 			    (void *)CONFIG_SYS_SPL_ARGS_ADDR, 0);
113 	if (err <= 0) {
114 		printf("spl: error reading image %s, err - %d\n",
115 		       CONFIG_SPL_FAT_LOAD_ARGS_NAME, err);
116 		return -1;
117 	}
118 
119 	return mmc_load_image_fat(mmc, CONFIG_SPL_FAT_LOAD_KERNEL_NAME);
120 }
121 #endif
122 
123 #endif
124 
125 void spl_mmc_load_image(void)
126 {
127 	struct mmc *mmc;
128 	int err;
129 	u32 boot_mode;
130 
131 	mmc_initialize(gd->bd);
132 	/* We register only one device. So, the dev id is always 0 */
133 	mmc = find_mmc_device(0);
134 	if (!mmc) {
135 		puts("spl: mmc device not found!!\n");
136 		hang();
137 	}
138 
139 	err = mmc_init(mmc);
140 	if (err) {
141 		printf("spl: mmc init failed: err - %d\n", err);
142 		hang();
143 	}
144 
145 	boot_mode = spl_boot_mode();
146 	if (boot_mode == MMCSD_MODE_RAW) {
147 		debug("boot mode - RAW\n");
148 #ifdef CONFIG_SPL_OS_BOOT
149 		if (spl_start_uboot() || mmc_load_image_raw_os(mmc))
150 #endif
151 		err = mmc_load_image_raw(mmc,
152 					 CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR);
153 #ifdef CONFIG_SPL_FAT_SUPPORT
154 	} else if (boot_mode == MMCSD_MODE_FAT) {
155 		debug("boot mode - FAT\n");
156 
157 		err = fat_register_device(&mmc->block_dev,
158 					  CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION);
159 		if (err) {
160 			printf("spl: fat register err - %d\n", err);
161 			hang();
162 		}
163 
164 #ifdef CONFIG_SPL_OS_BOOT
165 		if (spl_start_uboot() || mmc_load_image_fat_os(mmc))
166 #endif
167 		err = mmc_load_image_fat(mmc, CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME);
168 #endif
169 	} else {
170 		puts("spl: wrong MMC boot mode\n");
171 		hang();
172 	}
173 
174 	if (err)
175 		hang();
176 }
177