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1 | /* |
2 | * This program is free software; you can redistribute it and/or | |
3 | * modify it under the terms of the GNU General Public License as | |
4 | * published by the Free Software Foundation; either version 2 of | |
5 | * the License, or (at your option) any later version. | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | * | |
12 | * You should have received a copy of the GNU General Public License | |
13 | * along with this program; if not, write to the Free Software | |
14 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
15 | * MA 02111-1307 USA | |
16 | */ | |
17 | ||
18 | #include <config.h> | |
19 | #include <common.h> | |
20 | #include <mmc.h> | |
21 | #include <asm/errno.h> | |
22 | #include <asm/arch/hardware.h> | |
23 | #include <part.h> | |
24 | #include <fat.h> | |
25 | #include "mmc_hw.h" | |
26 | #include <asm/arch/spi.h> | |
27 | ||
28 | #ifdef CONFIG_MMC | |
29 | ||
30 | #undef MMC_DEBUG | |
31 | ||
32 | static block_dev_desc_t mmc_dev; | |
33 | ||
34 | /* these are filled out by a call to mmc_hw_get_parameters */ | |
35 | static int hw_size; /* in kbytes */ | |
36 | static int hw_nr_sects; | |
37 | static int hw_sect_size; /* in bytes */ | |
38 | ||
39 | block_dev_desc_t * mmc_get_dev(int dev) | |
40 | { | |
41 | return (block_dev_desc_t *)(&mmc_dev); | |
42 | } | |
43 | ||
44 | unsigned long mmc_block_read(int dev, | |
45 | unsigned long start, | |
46 | lbaint_t blkcnt, | |
47 | void *buffer) | |
48 | { | |
49 | unsigned long rc = 0; | |
50 | unsigned char *p = (unsigned char *)buffer; | |
51 | unsigned long i; | |
52 | unsigned long addr = start; | |
53 | ||
54 | #ifdef MMC_DEBUG | |
55 | printf("mmc_block_read: start=%lu, blkcnt=%lu\n", start, | |
56 | (unsigned long)blkcnt); | |
57 | #endif | |
58 | ||
59 | for(i = 0; i < (unsigned long)blkcnt; i++) { | |
60 | #ifdef MMC_DEBUG | |
61 | printf("mmc_read_sector: addr=%lu, buffer=%p\n", addr, p); | |
62 | #endif | |
63 | (void)mmc_read_sector(addr, p); | |
64 | rc++; | |
65 | addr++; | |
66 | p += hw_sect_size; | |
67 | } | |
68 | ||
69 | return rc; | |
70 | } | |
71 | ||
72 | /*----------------------------------------------------------------------------- | |
73 | * Read hardware paramterers (sector size, size, number of sectors) | |
74 | */ | |
75 | static int mmc_hw_get_parameters(void) | |
76 | { | |
77 | unsigned char csddata[16]; | |
78 | unsigned int sizemult; | |
79 | unsigned int size; | |
80 | ||
81 | mmc_read_csd(csddata); | |
82 | hw_sect_size = 1<<(csddata[5] & 0x0f); | |
83 | size = ((csddata[6]&0x03)<<10)+(csddata[7]<<2)+(csddata[8]&0xc0); | |
84 | sizemult = ((csddata[10] & 0x80)>>7)+((csddata[9] & 0x03)<<1); | |
85 | hw_nr_sects = (size+1)*(1<<(sizemult+2)); | |
86 | hw_size = hw_nr_sects*hw_sect_size/1024; | |
87 | ||
88 | #ifdef MMC_DEBUG | |
89 | printf("mmc_hw_get_parameters: hw_sect_size=%d, hw_nr_sects=%d, " | |
90 | "hw_size=%d\n", hw_sect_size, hw_nr_sects, hw_size); | |
91 | #endif | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
96 | int mmc_init(int verbose) | |
97 | { | |
98 | int ret = -ENODEV; | |
99 | ||
100 | if (verbose) | |
101 | printf("mmc_init\n"); | |
102 | ||
103 | spi_init(); | |
104 | /* this meeds to be done twice */ | |
105 | mmc_hw_init(); | |
106 | udelay(1000); | |
107 | mmc_hw_init(); | |
108 | ||
109 | mmc_hw_get_parameters(); | |
110 | ||
111 | mmc_dev.if_type = IF_TYPE_MMC; | |
112 | mmc_dev.part_type = PART_TYPE_DOS; | |
113 | mmc_dev.dev = 0; | |
114 | mmc_dev.lun = 0; | |
115 | mmc_dev.type = 0; | |
116 | mmc_dev.blksz = hw_sect_size; | |
117 | mmc_dev.lba = hw_nr_sects; | |
118 | sprintf((char*)mmc_dev.vendor, "Unknown vendor"); | |
119 | sprintf((char*)mmc_dev.product, "Unknown product"); | |
120 | sprintf((char*)mmc_dev.revision, "N/A"); | |
121 | mmc_dev.removable = 0; /* should be true??? */ | |
122 | mmc_dev.block_read = mmc_block_read; | |
123 | ||
124 | fat_register_device(&mmc_dev, 1); | |
125 | ||
126 | ret = 0; | |
127 | ||
128 | return ret; | |
129 | } | |
130 | ||
131 | int mmc_write(uchar * src, ulong dst, int size) | |
132 | { | |
133 | #ifdef MMC_DEBUG | |
134 | printf("mmc_write: src=%p, dst=%lu, size=%u\n", src, dst, size); | |
135 | #endif | |
136 | /* Since mmc2info always returns 0 this function will never be called */ | |
137 | return 0; | |
138 | } | |
139 | ||
140 | int mmc_read(ulong src, uchar * dst, int size) | |
141 | { | |
142 | #ifdef MMC_DEBUG | |
143 | printf("mmc_read: src=%lu, dst=%p, size=%u\n", src, dst, size); | |
144 | #endif | |
145 | /* Since mmc2info always returns 0 this function will never be called */ | |
146 | return 0; | |
147 | } | |
148 | ||
149 | int mmc2info(ulong addr) | |
150 | { | |
151 | /* This function is used by cmd_cp to determine if source or destination | |
152 | address resides on MMC-card or not. We do not support copy to and from | |
153 | MMC-card so we always return 0. */ | |
154 | return 0; | |
155 | } | |
156 | ||
157 | #endif /* CONFIG_MMC */ |