diff options
Diffstat (limited to 'backends/platform/ds/arm9/source/fat/io_nmmc.c')
| -rw-r--r-- | backends/platform/ds/arm9/source/fat/io_nmmc.c | 58 |
1 files changed, 29 insertions, 29 deletions
diff --git a/backends/platform/ds/arm9/source/fat/io_nmmc.c b/backends/platform/ds/arm9/source/fat/io_nmmc.c index a29c26e43a..261096a27b 100644 --- a/backends/platform/ds/arm9/source/fat/io_nmmc.c +++ b/backends/platform/ds/arm9/source/fat/io_nmmc.c @@ -13,10 +13,10 @@ project at chishm@hotmail.com See gba_nds_fat.txt for help and license details. - + 2006-02-09 - www.neoflash.com: * First stable release - + 2006-02-13 - Chishm * Added ReadMK2Config function * Added read config test to init function so no unnecessary card commands are sent @@ -87,7 +87,7 @@ void Neo_WriteMK2Config(u8 config) { Neo_EnableEEPROM(false); } -u8 Neo_ReadMK2Config(void) +u8 Neo_ReadMK2Config(void) { u8 config; Neo_EnableEEPROM(true); @@ -104,7 +104,7 @@ u8 Neo_ReadMK2Config(void) u8 selectMMC_command [8] = {0xFF, 0x00, 0x6A, 0xDF, 0x37, 0x59, 0x33, 0xA3}; -void Neo_SelectMMC (u8 dataByte) +void Neo_SelectMMC (u8 dataByte) { selectMMC_command[1] = dataByte; // Set enable / disable byte cardWriteCommand (selectMMC_command); // Send "5. Use the EEPROM CS to access the MK2 MMC/SD card" @@ -154,12 +154,12 @@ bool Neo_CheckMMCResponse( u8 response, u8 mask ) { bool Neo_InitMMC() { Neo_MK2GameMode(); Neo_WriteMK2Config( MK2_CONFIG_ZIP_RAM_CLOSE | MK2_CONFIG_GAME_FLASH_CLOSE); - + // Make sure the configuration was accepted if (Neo_ReadMK2Config() != (MK2_CONFIG_ZIP_RAM_CLOSE | MK2_CONFIG_GAME_FLASH_CLOSE)) { return false; // If not, then it wasn't initialised properly } - + return true; } @@ -167,7 +167,7 @@ bool Neo_InitMMC() { bool NMMC_IsInserted(void) { int i; - + Neo_EnableMMC( true ); // Open SPI port to MMC card Neo_SendMMCCommand(MMC_SEND_CSD, 0); if( Neo_CheckMMCResponse( 0x00, 0xFF ) == false ) { // Make sure no errors occured @@ -183,13 +183,13 @@ bool NMMC_IsInserted(void) { for (i = 0; i < 28; i++) { Neo_SPI(0xff); } - + return true; } bool NMMC_ClearStatus (void) { u32 i; - + Neo_EnableMMC( true ); // Open SPI port to MMC card for (i = 0; i < 10; i++) { Neo_SPI(0xFF); // Send 10 0xFF bytes to MMC card @@ -224,14 +224,14 @@ bool NMMC_StartUp(void) { return false; } Neo_EnableMMC( true ); // Open SPI port to MMC card - + // Set block length Neo_SendMMCCommand(MMC_SET_BLOCKLEN, BYTE_PER_READ ); if( Neo_CheckMMCResponse( 0x00, 0xFF ) == false ) { // Make sure no errors occured Neo_EnableMMC( false ); return false; } - + // Check if we can use a higher SPI frequency Neo_SendMMCCommand(MMC_SEND_CSD, 0); if( Neo_CheckMMCResponse( 0x00, 0xFF ) == false ) { // Make sure no errors occured @@ -252,77 +252,77 @@ bool NMMC_StartUp(void) { if ((transSpeed & 0xf0) >= 0x30) { spi_freq = 0; } - + Neo_EnableMMC( false ); return true; -} +} -bool NMMC_WriteSectors (u32 sector, u8 numSecs, void* buffer) +bool NMMC_WriteSectors (u32 sector, u8 numSecs, void* buffer) { u32 i; u8 *p=buffer; - + int totalSecs = (numSecs == 0) ? 256 : numSecs; sector *= BYTE_PER_READ; - + Neo_EnableMMC( true ); // Open SPI port to MMC card Neo_SendMMCCommand( 25, sector ); if( Neo_CheckMMCResponse( 0x00, 0xFF ) == false ) { // Make sure no errors occured Neo_EnableMMC( false ); return false; } - + while (totalSecs--) { Neo_SPI( 0xFC ); // Send Start Block token for( i = 0; i < BYTE_PER_READ; i++ ) // Send a block of data Neo_SPI( *p++ ); Neo_SPI( 0xFF ); // Send fake CRC16 Neo_SPI( 0xFF ); // Send fake CRC16 - + if( ( Neo_SPI( 0xFF ) & 0x0F ) != 0x05 ) { // Make sure the block was accepted Neo_EnableMMC( false ); return false; } while( Neo_SPI( 0xFF ) == 0x00 ); // Wait for the block to be written } - + // Stop transmission block Neo_SPI( 0xFD ); // Send Stop Transmission Block token for( i = 0; i < BYTE_PER_READ; i++ ) // Send a block of fake data Neo_SPI( 0xFF ); Neo_SPI( 0xFF ); // Send fake CRC16 Neo_SPI( 0xFF ); // Send fake CRC16 - + Neo_SPI (0xFF); // Send 8 clocks while( Neo_SPI( 0xFF ) == 0x00 ); // Wait for the busy signal to clear - - for ( i = 0; i < 0x10; i++) { + + for ( i = 0; i < 0x10; i++) { Neo_SPI (0xFF); // Send clocks for the MMC card to finish what it's doing } - + Neo_EnableMMC( false ); // Close SPI port to MMC card return true; } -bool NMMC_ReadSectors (u32 sector, u8 numSecs, void* buffer) +bool NMMC_ReadSectors (u32 sector, u8 numSecs, void* buffer) { u32 i; u8 *p=buffer; - + int totalSecs = (numSecs == 0) ? 256 : numSecs; sector *= BYTE_PER_READ; - + Neo_EnableMMC( true ); // Open SPI port to MMC card - + while (totalSecs--) { Neo_SendMMCCommand(MMC_READ_BLOCK, sector ); if( Neo_CheckMMCResponse( 0x00, 0xFF ) == false ) { // Make sure no errors occured Neo_EnableMMC( false ); return false; } - + if( Neo_CheckMMCResponse( 0xFE, 0xFF ) == false ) { // Check for Start Block token Neo_EnableMMC( false ); return false; @@ -333,7 +333,7 @@ bool NMMC_ReadSectors (u32 sector, u8 numSecs, void* buffer) Neo_SPI( 0xFF ); // Ignore CRC16 sector += BYTE_PER_READ; } - + Neo_EnableMMC( false ); // Close SPI port to MMC card return true; } |