blob: fd7f149b66ce553d863bb820b3b2c9d534d40f27 [file] [log] [blame]
Peter Pearse160131b2007-05-09 11:41:58 +01001/*
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
32static block_dev_desc_t mmc_dev;
33
34/* these are filled out by a call to mmc_hw_get_parameters */
35static int hw_size; /* in kbytes */
36static int hw_nr_sects;
37static int hw_sect_size; /* in bytes */
38
39block_dev_desc_t * mmc_get_dev(int dev)
40{
41 return (block_dev_desc_t *)(&mmc_dev);
42}
43
44unsigned 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 */
75static 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
96int 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
131int 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
140int 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
149int 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 */