diff options
Diffstat (limited to 'backends/platform/ds/arm9/source/fat/io_sccf.c')
| -rw-r--r-- | backends/platform/ds/arm9/source/fat/io_sccf.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/backends/platform/ds/arm9/source/fat/io_sccf.c b/backends/platform/ds/arm9/source/fat/io_sccf.c new file mode 100644 index 0000000000..336387e9d7 --- /dev/null +++ b/backends/platform/ds/arm9/source/fat/io_sccf.c @@ -0,0 +1,174 @@ +/* + io_sccf.c based on + + compact_flash.c + By chishm (Michael Chisholm) + + Hardware Routines for reading a compact flash card + using the Super Card CF + + CF routines modified with help from Darkfader + + This software is completely free. No warranty is provided. + If you use it, please give me credit and email me about your + project at chishm@hotmail.com + + See gba_nds_fat.txt for help and license details. +*/ + + +#include "io_sccf.h" + +#ifdef SUPPORT_SCCF + +#ifndef SUPPORT_MPCF + #error Supercard CF support requires GBAMP CF support +#endif // SUPPORT_MPCF + +/*----------------------------------------------------------------- +Since all CF addresses and commands are the same for the GBAMP, +simply use it's functions instead. +-----------------------------------------------------------------*/ + +extern bool MPCF_IsInserted (void); +extern bool MPCF_ClearStatus (void); +extern bool MPCF_ReadSectors (u32 sector, u8 numSecs, void* buffer); +extern bool MPCF_WriteSectors (u32 sector, u8 numSecs, void* buffer); + + +/*----------------------------------------------------------------- +SCCF_Unlock +Returns true if SuperCard was unlocked, false if failed +Added by MightyMax +Modified by Chishm +-----------------------------------------------------------------*/ +bool SCCF_Unlock(void) +{ +#define CF_REG_LBA1 *(volatile unsigned short *)0x09060000 + unsigned char temp; + volatile short *unlockAddress = (volatile short *)0x09FFFFFE; + *unlockAddress = 0xA55A ; + *unlockAddress = 0xA55A ; + *unlockAddress = 0x3 ; + *unlockAddress = 0x3 ; + // provoke a ready reply + temp = CF_REG_LBA1; + CF_REG_LBA1 = (~temp & 0xFF); + temp = (~temp & 0xFF); + return (CF_REG_LBA1 == temp); +#undef CF_REG_LBA1 +} + +bool SCCF_Shutdown(void) { + return MPCF_ClearStatus() ; +} ; + +bool SCCF_StartUp(void) { + return SCCF_Unlock() ; +} ; + + +IO_INTERFACE io_sccf = { + DEVICE_TYPE_SCCF, + FEATURE_MEDIUM_CANREAD | FEATURE_MEDIUM_CANWRITE | FEATURE_SLOT_GBA, + (FN_MEDIUM_STARTUP)&SCCF_StartUp, + (FN_MEDIUM_ISINSERTED)&MPCF_IsInserted, + (FN_MEDIUM_READSECTORS)&MPCF_ReadSectors, + (FN_MEDIUM_WRITESECTORS)&MPCF_WriteSectors, + (FN_MEDIUM_CLEARSTATUS)&MPCF_ClearStatus, + (FN_MEDIUM_SHUTDOWN)&SCCF_Shutdown +} ; + + +LPIO_INTERFACE SCCF_GetInterface(void) { + return &io_sccf ; +} ; + +#endif // SUPPORT_SCCF +/* + io_sccf.c based on + + compact_flash.c + By chishm (Michael Chisholm) + + Hardware Routines for reading a compact flash card + using the Super Card CF + + CF routines modified with help from Darkfader + + This software is completely free. No warranty is provided. + If you use it, please give me credit and email me about your + project at chishm@hotmail.com + + See gba_nds_fat.txt for help and license details. +*/ + + +#include "io_sccf.h" + +#ifdef SUPPORT_SCCF + +#ifndef SUPPORT_MPCF + #error Supercard CF support requires GBAMP CF support +#endif // SUPPORT_MPCF + +/*----------------------------------------------------------------- +Since all CF addresses and commands are the same for the GBAMP, +simply use it's functions instead. +-----------------------------------------------------------------*/ + +extern bool MPCF_IsInserted (void); +extern bool MPCF_ClearStatus (void); +extern bool MPCF_ReadSectors (u32 sector, u8 numSecs, void* buffer); +extern bool MPCF_WriteSectors (u32 sector, u8 numSecs, void* buffer); + + +/*----------------------------------------------------------------- +SCCF_Unlock +Returns true if SuperCard was unlocked, false if failed +Added by MightyMax +Modified by Chishm +-----------------------------------------------------------------*/ +bool SCCF_Unlock(void) +{ +#define CF_REG_LBA1 *(volatile unsigned short *)0x09060000 + unsigned char temp; + volatile short *unlockAddress = (volatile short *)0x09FFFFFE; + *unlockAddress = 0xA55A ; + *unlockAddress = 0xA55A ; + *unlockAddress = 0x3 ; + *unlockAddress = 0x3 ; + // provoke a ready reply + temp = CF_REG_LBA1; + CF_REG_LBA1 = (~temp & 0xFF); + temp = (~temp & 0xFF); + return (CF_REG_LBA1 == temp); +#undef CF_REG_LBA1 +} + +bool SCCF_Shutdown(void) { + return MPCF_ClearStatus() ; +} ; + +bool SCCF_StartUp(void) { + return SCCF_Unlock() ; +} ; + + +IO_INTERFACE io_sccf = { + DEVICE_TYPE_SCCF, + FEATURE_MEDIUM_CANREAD | FEATURE_MEDIUM_CANWRITE | FEATURE_SLOT_GBA, + (FN_MEDIUM_STARTUP)&SCCF_StartUp, + (FN_MEDIUM_ISINSERTED)&MPCF_IsInserted, + (FN_MEDIUM_READSECTORS)&MPCF_ReadSectors, + (FN_MEDIUM_WRITESECTORS)&MPCF_WriteSectors, + (FN_MEDIUM_CLEARSTATUS)&MPCF_ClearStatus, + (FN_MEDIUM_SHUTDOWN)&SCCF_Shutdown +} ; + + +LPIO_INTERFACE SCCF_GetInterface(void) { + return &io_sccf ; +} ; + +#endif // SUPPORT_SCCF |