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Diffstat (limited to 'backends/platform/ds/arm9/source/fat/io_nmmc.c')
-rw-r--r--backends/platform/ds/arm9/source/fat/io_nmmc.c358
1 files changed, 0 insertions, 358 deletions
diff --git a/backends/platform/ds/arm9/source/fat/io_nmmc.c b/backends/platform/ds/arm9/source/fat/io_nmmc.c
index 2e6b99de24..a29c26e43a 100644
--- a/backends/platform/ds/arm9/source/fat/io_nmmc.c
+++ b/backends/platform/ds/arm9/source/fat/io_nmmc.c
@@ -356,361 +356,3 @@ LPIO_INTERFACE NMMC_GetInterface(void) {
}
#endif // #ifdef SUPPORT_NMMC
-/*
- io_nmmc.c
-
- Hardware Routines for reading an SD or MMC card using
- a Neoflash MK2 or MK3.
-
- Written by www.neoflash.com
-
- Submit bug reports for this device to the NeoFlash forums
-
- 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.
-
- 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
- * Changed data read and write functions to use multiple block commands
-*/
-
-#include "io_nmmc.h"
-
-#ifdef SUPPORT_NMMC
-
-#include <nds/card.h>
-
-int spi_freq = 3;
-
-#define MK2_CONFIG_ZIP_RAM_CLOSE (1 << 5)
-#define MK2_CONFIG_GAME_FLASH_CLOSE ((1 << 4) | (1 << 0))
-//#define MK2_CONFIG_ZIP_RAM_CLOSE ((1 << 5) | (1 << 1))
-//#define MK2_CONFIG_GAME_FLASH_CLOSE (1 << 4)
-
-#define MMC_READ_MULTIPLE_BLOCK 18
-#define MMC_READ_BLOCK 17
-#define MMC_WRITE_MULTIPLE_BLOCK 25
-#define MMC_WRITE_BLOCK 24
-#define MMC_STOP_TRANSMISSION 12
-#define MMC_SET_BLOCKLEN 16
-#define MMC_SET_BLOCK_COUNT 23
-#define MMC_SEND_CSD 9
-
-// SPI functions
-
-static inline void Neo_OpenSPI( u8 frequency )
-{
- CARD_CR1 = 0x0000A040 | frequency;
-}
-
-static inline u8 Neo_SPI( u8 dataByte )
-{
- CARD_EEPDATA = dataByte;
- while (CARD_CR1 & 0x80); // card busy
- return CARD_EEPDATA;
-}
-
-static inline void Neo_CloseSPI ( void )
-{
- CARD_CR1 = 0;
-}
-
-static inline void Neo_MK2GameMode() {
- Neo_OpenSPI(spi_freq); // Enable DS Card's SPI port
- Neo_SPI(0xF1); // Switch to game mode
- Neo_CloseSPI(); // Disable DS Card's SPI port
-}
-
-static inline void Neo_EnableEEPROM( bool enable ) {
- Neo_OpenSPI(spi_freq);
- if(enable) Neo_SPI(0x06);
- else Neo_SPI(0x0E);
- Neo_CloseSPI();
-}
-
-void Neo_WriteMK2Config(u8 config) {
- Neo_EnableEEPROM(true);
- Neo_OpenSPI(spi_freq);
- Neo_SPI(0xFA); // Send mem conf write command
- Neo_SPI(0x01); // Send high byte (0x01)
- Neo_SPI(config); // Send low byte
- Neo_CloseSPI();
- Neo_EnableEEPROM(false);
-}
-
-u8 Neo_ReadMK2Config(void)
-{
- u8 config;
- Neo_EnableEEPROM(true);
- Neo_OpenSPI(spi_freq);
- Neo_SPI(0xf8); // Send mem conf read command
- Neo_SPI(0x01); // Send high byte
- config = Neo_SPI(0x00); // Get low byte
- Neo_CloseSPI();
- Neo_EnableEEPROM(false);
- return config;
-}
-
-// Low level functions
-
-u8 selectMMC_command [8] = {0xFF, 0x00, 0x6A, 0xDF, 0x37, 0x59, 0x33, 0xA3};
-
-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"
- CARD_CR2 = CARD_ACTIVATE | CARD_nRESET;
- while (CARD_CR2 & CARD_BUSY);
- return;
-}
-
-void Neo_EnableMMC( bool enable )
-{
- if ( enable == false) {
- Neo_CloseSPI ();
- Neo_SelectMMC (0);
- Neo_SelectMMC (0);
- } else {
- Neo_SelectMMC (1);
- Neo_SelectMMC (1);
- Neo_OpenSPI (spi_freq);
- }
- return;
-}
-
-void Neo_SendMMCCommand( u8 command, u32 argument )
-{
- Neo_SPI (0xFF);
- Neo_SPI (command | 0x40);
- Neo_SPI ((argument >> 24) & 0xff);
- Neo_SPI ((argument >> 16) & 0xff);
- Neo_SPI ((argument >> 8) & 0xff) ;
- Neo_SPI (argument & 0xff);
- Neo_SPI (0x95);
- Neo_SPI (0xFF);
- return;
-}
-
-bool Neo_CheckMMCResponse( u8 response, u8 mask ) {
- u32 i;
- for(i=0;i<256;i++) {
- if( ( Neo_SPI( 0xFF ) & mask ) == response )
- return true;
- }
- return false;
-}
-
-// Neo MMC functions
-
-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;
-}
-
-// Neo MMC driver functions
-
-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
- Neo_EnableMMC( false );
- return false;
- }
- if( Neo_CheckMMCResponse( 0xFE, 0xFF ) == false ) { // Check for Start Block token
- Neo_EnableMMC( false );
- return false;
- }
-
- // consume data from card, and send clocks.
- 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
- }
- Neo_SendMMCCommand(0, 0); // Send GO_IDLE_STATE command
- if( Neo_CheckMMCResponse( 0x01, 0xFF ) == false ) { // Check that it replied with 0x01 (not idle, no other error)
- Neo_EnableMMC( false );
- return false;
- }
- for(i=0;i<256;i++) {
- Neo_SendMMCCommand(1, 0); // Poll with SEND_OP_COND
- if( Neo_CheckMMCResponse( 0x00, 0x01 ) == true ) { // Check for idle state
- Neo_EnableMMC( false ); // Close SPI port to MMC card
- return true; // Card is now idle
- }
- }
- Neo_EnableMMC( false );
- return false;
-}
-
-bool NMMC_Shutdown(void) {
- return NMMC_ClearStatus();
-}
-
-bool NMMC_StartUp(void) {
- int i;
- int transSpeed;
- if (Neo_InitMMC() == false) {
- return false;
- }
- if (NMMC_ClearStatus() == false) {
- 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
- Neo_EnableMMC( false );
- return false;
- }
- if( Neo_CheckMMCResponse( 0xFE, 0xFF ) == false ) { // Check for Start Block token
- Neo_EnableMMC( false );
- return false;
- }
- for (i = 0; i < 3; i++) {
- Neo_SPI(0xFF);
- }
- transSpeed = Neo_SPI (0xFF);
- for (i = 0; i < 24; i++) {
- Neo_SPI(0xFF);
- }
- if ((transSpeed & 0xf0) >= 0x30) {
- spi_freq = 0;
- }
-
- Neo_EnableMMC( false );
- return true;
-}
-
-
-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++) {
- 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)
-{
- 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;
- }
- for( i = 0; i < BYTE_PER_READ; i++ ) // Read in a block of data
- *p++ = Neo_SPI( 0xFF );
- Neo_SPI( 0xFF ); // Ignore CRC16
- Neo_SPI( 0xFF ); // Ignore CRC16
- sector += BYTE_PER_READ;
- }
-
- Neo_EnableMMC( false ); // Close SPI port to MMC card
- return true;
-}
-
-
-IO_INTERFACE io_nmmc = {
- DEVICE_TYPE_NMMC,
- FEATURE_MEDIUM_CANREAD | FEATURE_MEDIUM_CANWRITE,
- (FN_MEDIUM_STARTUP)&NMMC_StartUp,
- (FN_MEDIUM_ISINSERTED)&NMMC_IsInserted,
- (FN_MEDIUM_READSECTORS)&NMMC_ReadSectors,
- (FN_MEDIUM_WRITESECTORS)&NMMC_WriteSectors,
- (FN_MEDIUM_CLEARSTATUS)&NMMC_ClearStatus,
- (FN_MEDIUM_SHUTDOWN)&NMMC_Shutdown
-} ;
-
-
-LPIO_INTERFACE NMMC_GetInterface(void) {
- return &io_nmmc ;
-}
-
-#endif // #ifdef SUPPORT_NMMC
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