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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright © 2009 by Rafaël Carré
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "logf.h"
#include "hotswap.h"
#include "storage.h"
static const unsigned char sd_mantissa[] = { /* *10 */
0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 };
static const unsigned int sd_exponent[] = { /* use varies */
1,10,100,1000,10000,100000,1000000,10000000,100000000,1000000000 };
void sd_parse_csd(tCardInfo *card)
{
unsigned int c_size, c_mult;
const int csd_version = card_extract_bits(card->csd, 127, 2);
if(csd_version == 0)
{
/* CSD version 1.0 */
int max_read_bl_len;
c_size = card_extract_bits(card->csd, 73, 12) + 1;
c_mult = 4 << card_extract_bits(card->csd, 49, 3);
max_read_bl_len = 1 << card_extract_bits(card->csd, 83, 4);
card->numblocks = c_size * c_mult * (max_read_bl_len/512);
}
else if(csd_version == 1)
{
/* CSD version 2.0 */
c_size = card_extract_bits(card->csd, 69, 22) + 1;
card->numblocks = c_size << 10;
}
card->blocksize = 512; /* Always use 512 byte blocks */
card->speed = sd_mantissa[card_extract_bits(card->csd, 102, 4)] *
sd_exponent[card_extract_bits(card->csd, 98, 3) + 4];
card->nsac = 100 * card_extract_bits(card->csd, 111, 8);
card->taac = sd_mantissa[card_extract_bits(card->csd, 118, 4)] *
sd_exponent[card_extract_bits(card->csd, 114, 3)];
card->r2w_factor = card_extract_bits(card->csd, 28, 3);
logf("CSD%d.0 numblocks:%d speed:%d", csd_version+1, card->numblocks, card->speed);
logf("nsac: %d taac: %d r2w: %d", card->nsac, card->taac, card->r2w_factor);
}
#ifdef STORAGE_GET_INFO
void sd_get_info(IF_MV2(int drive,) struct storage_info *info)
{
#ifndef HAVE_MULTIVOLUME
const int drive=0;
#endif
tCardInfo *card = card_get_info_target(drive);
info->sector_size=card->blocksize;
info->num_sectors=card->numblocks;
info->vendor="Rockbox";
#if CONFIG_STORAGE == STORAGE_SD
info->product = (drive==0) ? "Internal Storage" : "SD Card Slot";
#else /* Internal storage is not SD */
info->product = "SD Card Slot";
#endif
info->revision="0.00";
}
#endif
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