Skip to content

GitLab

Switch branch/tag
Find file Normal viewHistoryPermalink
io_mmc.c 2.93 KB
Newer Older
Yann Gautier's avatar
stm32mp1: add an IO to read MMC devices    
Yann Gautier committed
1
2
3
4
5
6
7
8
9
10 
/*
 * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <assert.h>
#include <errno.h>
#include <string.h>
Antonio Nino Diaz's avatar
Sanitise includes across codebase    
Antonio Nino Diaz committed
11
12
13
14
15
16
17 
#include <common/debug.h>
#include <drivers/io/io_driver.h>
#include <drivers/io/io_storage.h>
#include <drivers/mmc.h>
#include <drivers/st/io_mmc.h>
#include <drivers/st/stm32_sdmmc2.h>
Yann Gautier's avatar
stm32mp1: add an IO to read MMC devices    
Yann Gautier committed
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 
/* SDMMC device functions */
static int mmc_dev_open(const uintptr_t init_params, io_dev_info_t **dev_info);
static int mmc_block_open(io_dev_info_t *dev_info, const uintptr_t spec,
			  io_entity_t *entity);
static int mmc_dev_init(io_dev_info_t *dev_info, const uintptr_t init_params);
static int mmc_block_seek(io_entity_t *entity, int mode, ssize_t offset);
static int mmc_block_read(io_entity_t *entity, uintptr_t buffer, size_t length,
			  size_t *length_read);
static int mmc_block_close(io_entity_t *entity);
static int mmc_dev_close(io_dev_info_t *dev_info);
static io_type_t device_type_mmc(void);

static ssize_t seek_offset;

static const io_dev_connector_t mmc_dev_connector = {
	.dev_open = mmc_dev_open
};

static const io_dev_funcs_t mmc_dev_funcs = {
	.type = device_type_mmc,
	.open = mmc_block_open,
	.seek = mmc_block_seek,
	.size = NULL,
	.read = mmc_block_read,
	.write = NULL,
	.close = mmc_block_close,
	.dev_init = mmc_dev_init,
	.dev_close = mmc_dev_close,
};

static const io_dev_info_t mmc_dev_info = {
	.funcs = &mmc_dev_funcs,
	.info = 0,
};

/* Identify the device type as mmc device */
static io_type_t device_type_mmc(void)
{
	return IO_TYPE_MMC;
}

/* Open a connection to the mmc device */
static int mmc_dev_open(const uintptr_t init_params, io_dev_info_t **dev_info)
{
	assert(dev_info != NULL);
	*dev_info = (io_dev_info_t *)&mmc_dev_info;

	return 0;
}

static int mmc_dev_init(io_dev_info_t *dev_info, const uintptr_t init_params)
{
	return 0;
}

/* Close a connection to the mmc device */
static int mmc_dev_close(io_dev_info_t *dev_info)
{
	return 0;
}

/* Open a file on the mmc device */
static int mmc_block_open(io_dev_info_t *dev_info, const  uintptr_t spec,
			  io_entity_t *entity)
{
	seek_offset = 0;
	return 0;
}

/* Seek to a particular file offset on the mmc device */
static int mmc_block_seek(io_entity_t *entity, int mode, ssize_t offset)
{
	seek_offset = offset;
	return 0;
}

/* Read data from a file on the mmc device */
static int mmc_block_read(io_entity_t *entity, uintptr_t buffer,
			  size_t length, size_t *length_read)
{
	*length_read = mmc_read_blocks(seek_offset / MMC_BLOCK_SIZE,
				       buffer, length);

	if (*length_read != length) {
		return -EIO;
	}

	return 0;
}

/* Close a file on the mmc device */
static int mmc_block_close(io_entity_t *entity)
{
	return 0;
}

/* Register the mmc driver with the IO abstraction */
int register_io_dev_mmc(const io_dev_connector_t **dev_con)
{
	int result;

	assert(dev_con != NULL);

	result = io_register_device(&mmc_dev_info);
	if (result == 0) {
		*dev_con = &mmc_dev_connector;
	}

	return result;
}