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author | Rafaël Carré <rafael.carre@gmail.com> | 2009-07-01 21:49:13 +0000 |
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committer | Rafaël Carré <rafael.carre@gmail.com> | 2009-07-01 21:49:13 +0000 |
commit | c0eb9aeb9e89ae33a9f084167147d8eacb9c7c60 (patch) | |
tree | 57e96460989d9cccc421486769befb5648601b8c /firmware/drivers/sd.c | |
parent | 93f6e3df246ff50c24524c9d329f27a06e1845db (diff) | |
download | rockbox-c0eb9aeb9e89ae33a9f084167147d8eacb9c7c60.tar.gz rockbox-c0eb9aeb9e89ae33a9f084167147d8eacb9c7c60.zip |
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
Diffstat (limited to 'firmware/drivers/sd.c')
-rw-r--r-- | firmware/drivers/sd.c | 64 |
1 files changed, 64 insertions, 0 deletions
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 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright © 2009 by Rafaël Carré | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | |||
22 | #include "config.h" | ||
23 | #include "hotswap.h" | ||
24 | |||
25 | static const unsigned char sd_mantissa[] = { /* *10 */ | ||
26 | 0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 }; | ||
27 | static const unsigned int sd_exponent[] = { /* use varies */ | ||
28 | 1,10,100,1000,10000,100000,1000000,10000000,100000000,1000000000 }; | ||
29 | |||
30 | void sd_parse_csd(tCardInfo *card) | ||
31 | { | ||
32 | unsigned int c_size, c_mult; | ||
33 | const int csd_version = card_extract_bits(card->csd, 127, 2); | ||
34 | if(csd_version == 0) | ||
35 | { | ||
36 | /* CSD version 1.0 */ | ||
37 | int max_read_bl_len; | ||
38 | |||
39 | c_size = card_extract_bits(card->csd, 73, 12) + 1; | ||
40 | c_mult = 4 << card_extract_bits(card->csd, 49, 3); | ||
41 | max_read_bl_len = 1 << card_extract_bits(card->csd, 83, 4); | ||
42 | card->numblocks = c_size * c_mult * (max_read_bl_len/512); | ||
43 | } | ||
44 | #ifdef HAVE_MULTIVOLUME | ||
45 | else if(csd_version == 1) | ||
46 | { | ||
47 | /* CSD version 2.0 */ | ||
48 | c_size = card_extract_bits(card->csd, 69, 22) + 1; | ||
49 | card->numblocks = c_size << 10; | ||
50 | } | ||
51 | #endif | ||
52 | |||
53 | card->blocksize = 512; /* Always use 512 byte blocks */ | ||
54 | |||
55 | card->speed = sd_mantissa[card_extract_bits(card->csd, 102, 4)] * | ||
56 | sd_exponent[card_extract_bits(card->csd, 98, 3) + 4]; | ||
57 | |||
58 | card->nsac = 100 * card_extract_bits(card->csd, 111, 8); | ||
59 | |||
60 | card->taac = sd_mantissa[card_extract_bits(card->csd, 118, 4)] * | ||
61 | sd_exponent[card_extract_bits(card->csd, 114, 3)]; | ||
62 | |||
63 | card->r2w_factor = card_extract_bits(card->csd, 28, 3); | ||
64 | } | ||