From c0eb9aeb9e89ae33a9f084167147d8eacb9c7c60 Mon Sep 17 00:00:00 2001 From: Rafaël Carré Date: Wed, 1 Jul 2009 21:49:13 +0000 Subject: add firmware/driver/sd.c which contains common code between SD drivers ingenic SD driver needs more cleanup so it still doesn't use the common code correct a comment in hotswap.c: card_extract_bits assume most significant word of register first (so, use this order) fix debug menu which used MMC specific commands / bits positions in csd/cid move the default block size of 512 into sd.h move the mantissa & exponent table into a single file (sd.c) to reduce binsize. we don't need to export it anymore anyway TODO : ingenic cleanup (will happen soon so building sd.c is not conditional) git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21601 a1c6a512-1295-4272-9138-f99709370657 --- firmware/drivers/sd.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 firmware/drivers/sd.c (limited to 'firmware/drivers/sd.c') diff --git a/firmware/drivers/sd.c b/firmware/drivers/sd.c new file mode 100644 index 0000000000..834d8a19fd --- /dev/null +++ b/firmware/drivers/sd.c @@ -0,0 +1,64 @@ +/*************************************************************************** + * __________ __ ___. + * 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 "hotswap.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); + } +#ifdef HAVE_MULTIVOLUME + else if(csd_version == 1) + { + /* CSD version 2.0 */ + c_size = card_extract_bits(card->csd, 69, 22) + 1; + card->numblocks = c_size << 10; + } +#endif + + 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); +} -- cgit v1.2.3