Merge branch 'agust@denx.de-next' of git://git.denx.de/u-boot-staging
[platform/kernel/u-boot.git] / drivers / mmc / spl_mmc.c
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 void mmc_load_image_raw(struct mmc *mmc)
36 {
37         u32 image_size_sectors, err;
38         const struct image_header *header;
39
40         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
41                                                 sizeof(struct image_header));
42
43         /* read image header to find the image size & load address */
44         err = mmc->block_dev.block_read(0,
45                         CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 1,
46                         (void *)header);
47
48         if (err <= 0)
49                 goto end;
50
51         spl_parse_image_header(header);
52
53         /* convert size to sectors - round up */
54         image_size_sectors = (spl_image.size + mmc->read_bl_len - 1) /
55                                 mmc->read_bl_len;
56
57         /* Read the header too to avoid extra memcpy */
58         err = mmc->block_dev.block_read(0,
59                         CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR,
60                         image_size_sectors, (void *)spl_image.load_addr);
61
62 end:
63         if (err <= 0) {
64                 printf("spl: mmc blk read err - %d\n", err);
65                 hang();
66         }
67 }
68
69 #ifdef CONFIG_SPL_FAT_SUPPORT
70 static void mmc_load_image_fat(struct mmc *mmc)
71 {
72         s32 err;
73         struct image_header *header;
74
75         header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
76                                                 sizeof(struct image_header));
77
78         err = fat_register_device(&mmc->block_dev,
79                                 CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION);
80         if (err) {
81                 printf("spl: fat register err - %d\n", err);
82                 hang();
83         }
84
85         err = file_fat_read(CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME,
86                                 (u8 *)header, sizeof(struct image_header));
87         if (err <= 0)
88                 goto end;
89
90         spl_parse_image_header(header);
91
92         err = file_fat_read(CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME,
93                                 (u8 *)spl_image.load_addr, 0);
94
95 end:
96         if (err <= 0) {
97                 printf("spl: error reading image %s, err - %d\n",
98                         CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME, err);
99                 hang();
100         }
101 }
102 #endif
103
104 void spl_mmc_load_image(void)
105 {
106         struct mmc *mmc;
107         int err;
108         u32 boot_mode;
109
110         mmc_initialize(gd->bd);
111         /* We register only one device. So, the dev id is always 0 */
112         mmc = find_mmc_device(0);
113         if (!mmc) {
114                 puts("spl: mmc device not found!!\n");
115                 hang();
116         }
117
118         err = mmc_init(mmc);
119         if (err) {
120                 printf("spl: mmc init failed: err - %d\n", err);
121                 hang();
122         }
123         boot_mode = spl_boot_mode();
124         if (boot_mode == MMCSD_MODE_RAW) {
125                 debug("boot mode - RAW\n");
126                 mmc_load_image_raw(mmc);
127 #ifdef CONFIG_SPL_FAT_SUPPORT
128         } else if (boot_mode == MMCSD_MODE_FAT) {
129                 debug("boot mode - FAT\n");
130                 mmc_load_image_fat(mmc);
131 #endif
132         } else {
133                 puts("spl: wrong MMC boot mode\n");
134                 hang();
135         }
136 }