diff options
Diffstat (limited to 'backends/platform/ds/arm9/source/fat/io_m3_common.c')
| -rw-r--r-- | backends/platform/ds/arm9/source/fat/io_m3_common.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/backends/platform/ds/arm9/source/fat/io_m3_common.c b/backends/platform/ds/arm9/source/fat/io_m3_common.c new file mode 100644 index 0000000000..ab2c143327 --- /dev/null +++ b/backends/platform/ds/arm9/source/fat/io_m3_common.c @@ -0,0 +1,60 @@ +/* + io_m3_common.c + + Routines common to all version of the M3 + + Some code based on M3 SD drivers supplied by M3Adapter. + Some code written by SaTa may have been unknowingly used. + + Copyright (c) 2006 Michael "Chishm" Chisholm + + Redistribution and use in source and binary forms, with or without modification, + are permitted provided that the following conditions are met: + + 1. Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + 2. Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation and/or + other materials provided with the distribution. + 3. The name of the author may not be used to endorse or promote products derived + from this software without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY + AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE + LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, + EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +#include "io_m3_common.h" + +static u16 _M3_readHalfword (u32 addr) { + return *((vu16*)addr); +} + +void _M3_changeMode (u32 mode) { + _M3_readHalfword (0x08e00002); + _M3_readHalfword (0x0800000e); + _M3_readHalfword (0x08801ffc); + _M3_readHalfword (0x0800104a); + _M3_readHalfword (0x08800612); + _M3_readHalfword (0x08000000); + _M3_readHalfword (0x08801b66); + _M3_readHalfword (0x08000000 + (mode << 1)); + _M3_readHalfword (0x0800080e); + _M3_readHalfword (0x08000000); + + if ((mode & 0x0f) != 4) { + _M3_readHalfword (0x09000000); + } else { + _M3_readHalfword (0x080001e4); + _M3_readHalfword (0x080001e4); + _M3_readHalfword (0x08000188); + _M3_readHalfword (0x08000188); + } +} + |