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/*
* Copyright (C) 2013 INRIA.
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup sys_shell_commands
* @{
*
* @file
* @brief Provides shell commands to access storage (like MMC)
*
* @author Oliver Hahm <oliver.hahm@inria.fr>
*
* @}
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "shell_commands.h"
#include "diskio.h"
static inline uint8_t sector_read(unsigned char *read_buf, unsigned long sector, unsigned long length, unsigned long offset)
{
if (mci_read(read_buf, sector, 1) == DISKIO_RES_OK) {
printf("[disk] Read sector %lu (%lu):\n", sector, offset);
for (unsigned long i = offset + 1; i <= offset + length; i++) {
printf(" %u", read_buf[i - 1]);
if (!(i % 16)) {
puts("");
}
}
puts("");
return 1;
}
return 0;
}
int _get_sectorsize(int argc, char **argv)
{
(void) argc;
(void) argv;
unsigned short ssize;
if (mci_ioctl(GET_SECTOR_SIZE, &ssize) == DISKIO_RES_OK) {
printf("[disk] sector size is %u\n", ssize);
return 0;
}
else {
puts("[disk] Failed to fetch sector size. Card inserted?");
return 1;
}
}
int _get_blocksize(int argc, char **argv)
{
(void) argc;
(void) argv;
unsigned long bsize;
if (mci_ioctl(GET_BLOCK_SIZE, &bsize) == DISKIO_RES_OK) {
printf("[disk] block size is %lu\n", bsize);
return 0;
}
else {
puts("[disk] Failed to fetch block size. Card inserted?");
return 1;
}
}
int _get_sectorcount(int argc, char **argv)
{
(void) argc;
(void) argv;
unsigned long scount;
if (mci_ioctl(GET_SECTOR_COUNT, &scount) == DISKIO_RES_OK) {
printf("[disk] sector count is %lu\n", scount);
return 0;
}
else {
puts("[disk] Failed to fetch sector count. Card inserted?");
return 1;
}
}
int _read_sector(int argc, char **argv)
{
if (argc == 2) {
unsigned long scount;
unsigned short ssize;
unsigned long sectornr = atol(argv[1]);
if ((mci_ioctl(GET_SECTOR_COUNT, &scount) == DISKIO_RES_OK) && (mci_ioctl(GET_SECTOR_SIZE, &ssize) == DISKIO_RES_OK)) {
unsigned char read_buf[ssize];
if (sector_read(read_buf, sectornr, ssize, 0)) {
return 0;
}
}
printf("[disk] Error while reading sector %lu\n", sectornr);
return 1;
}
else {
printf("[disk] Usage:\n%s <SECTOR>\n", argv[0]);
return 1;
}
}
int _read_bytes(int argc, char **argv)
{
unsigned long sector = 1, scount, offset;
unsigned short ssize, length;
if (argc != 3) {
printf("[disk] Usage:\n%s <OFFSET> <LENGTH>\n", argv[0]);
return 1;
}
offset = atol(argv[1]);
length = atoi(argv[2]);
/* get card info */
if ((mci_ioctl(GET_SECTOR_COUNT, &scount) == DISKIO_RES_OK) && (mci_ioctl(GET_SECTOR_SIZE, &ssize) == DISKIO_RES_OK)) {
/* calculate sector and offset position */
sector = (offset / ssize) + 1;
offset = (offset % ssize);
/* preapre buffer (size must be a multiple of sector size) */
unsigned char read_buf[((length / ssize) + 1) * 512];
/* read from several sectors */
if (length > (ssize - offset)) {
/* buffer offset */
unsigned long j = 0;
/* chunk from current sector */
unsigned short tmp = ssize - offset;
while (length) {
sector_read(read_buf + j, sector++, tmp, offset);
/* decrease length and recalculate chunk */
length -= tmp;
tmp = (length >= ssize) ? ssize : length;
}
return 0;
} /* length > (ssize - offset) */
/* read only one sector */
else {
if (sector_read(read_buf, sector, length, offset)) {
return 0;
}
} /* length < (ssize - offset) */
} /* ioctl */
printf("[disk] Error while reading sector %lu\n", sector);
return 1;
}
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