summaryrefslogtreecommitdiff
path: root/board/lpc2292sodimm/mmc.c
blob: e361db1866f9ea64337aaae6466b50aa6b95208c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <config.h>
#include <common.h>
#include <mmc.h>
#include <asm/errno.h>
#include <asm/arch/hardware.h>
#include <part.h>
#include <fat.h>
#include "mmc_hw.h"
#include "spi.h"

#ifdef CONFIG_MMC

#undef MMC_DEBUG

static block_dev_desc_t mmc_dev;

/* these are filled out by a call to mmc_hw_get_parameters */
static int hw_size;		/* in kbytes */
static int hw_nr_sects;
static int hw_sect_size;	/* in bytes */

block_dev_desc_t * mmc_get_dev(int dev)
{
	return (block_dev_desc_t *)(&mmc_dev);
}

unsigned long mmc_block_read(int dev, 
			     unsigned long start, 
			     lbaint_t blkcnt,
			     unsigned long *buffer)
{
	unsigned long rc = 0;
	unsigned char *p = (unsigned char *)buffer;
	unsigned long i;
	unsigned long addr = start;

#ifdef MMC_DEBUG
	printf("mmc_block_read: start=%lu, blkcnt=%lu\n", start, 
		 (unsigned long)blkcnt);
#endif

	for(i = 0; i < (unsigned long)blkcnt; i++) {
#ifdef MMC_DEBUG
		printf("mmc_read_sector: addr=%lu, buffer=%p\n", addr, p);
#endif
		(void)mmc_read_sector(addr, p);
		rc++;
		addr++;
		p += hw_sect_size;
	} 

	return rc;
}

/*-----------------------------------------------------------------------------
 * Read hardware paramterers (sector size, size, number of sectors)
 */
static int mmc_hw_get_parameters(void)
{
	unsigned char csddata[16];
	unsigned int sizemult;
	unsigned int size;

	mmc_read_csd(csddata);
	hw_sect_size = 1<<(csddata[5] & 0x0f);
	size = ((csddata[6]&0x03)<<10)+(csddata[7]<<2)+(csddata[8]&0xc0);
	sizemult = ((csddata[10] & 0x80)>>7)+((csddata[9] & 0x03)<<1);
	hw_nr_sects = (size+1)*(1<<(sizemult+2));
	hw_size = hw_nr_sects*hw_sect_size/1024;

#ifdef MMC_DEBUG
	printf("mmc_hw_get_parameters: hw_sect_size=%d, hw_nr_sects=%d, "
		 "hw_size=%d\n", hw_sect_size, hw_nr_sects, hw_size);
#endif

	return 0;
}

int mmc_init(int verbose)
{
	int ret = -ENODEV;

	if (verbose)
		printf("mmc_init\n");

	spi_init();
	mmc_hw_init();

	mmc_hw_get_parameters();

	mmc_dev.if_type = IF_TYPE_MMC;
	mmc_dev.part_type = PART_TYPE_DOS;
	mmc_dev.dev = 0;
	mmc_dev.lun = 0;
	mmc_dev.type = 0;
	mmc_dev.blksz = hw_sect_size;
	mmc_dev.lba = hw_nr_sects;
	sprintf((char*)mmc_dev.vendor, "Unknown vendor");
	sprintf((char*)mmc_dev.product, "Unknown product");
	sprintf((char*)mmc_dev.revision, "N/A");
	mmc_dev.removable = 0;	/* should be true??? */
	mmc_dev.block_read = mmc_block_read;

	fat_register_device(&mmc_dev, 1);

	ret = 0;

	return ret;
}

int mmc_write(uchar * src, ulong dst, int size)
{
#ifdef MMC_DEBUG
	printf("mmc_write: src=%p, dst=%lu, size=%u\n", src, dst, size);
#endif
	/* Since mmc2info always returns 0 this function will never be called */
	return 0;
}

int mmc_read(ulong src, uchar * dst, int size)
{
#ifdef MMC_DEBUG
	printf("mmc_read: src=%lu, dst=%p, size=%u\n", src, dst, size);
#endif
	/* Since mmc2info always returns 0 this function will never be called */
	return 0;
}

int mmc2info(ulong addr)
{
	/* This function is used by cmd_cp to determine if source or destination
	 address resides on MMC-card or not. We do not support copy to and from
	 MMC-card so we always return 0. */
	return 0;
}

#endif /* CONFIG_MMC */