/* io_mmcf.c based on compact_flash.c By chishm (Michael Chisholm) Hardware Routines for reading a compact flash card using the GBA Movie Player CF routines modified with help from Darkfader 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_mmcf.h" #include "io_cf_common.h" //--------------------------------------------------------------- // DMA #ifdef _CF_USE_DMA #ifndef NDS #include "gba_dma.h" #else #include #ifdef ARM9 #include #endif #endif #endif //--------------------------------------------------------------- // CF Addresses & Commands // Max Media Player CF Addresses #define REG_MMP_STS (*(vu16*)0x080E0000) // Status of the CF Card / Device control #define REG_MMP_CMD (*(vu16*)0x080E0000) // Commands sent to control chip and status return #define REG_MMP_ERR (*(vu16*)0x08020000) // Errors / Features #define REG_MMP_SEC (*(vu16*)0x08040000) // Number of sector to transfer #define REG_MMP_LBA1 (*(vu16*)0x08060000) // 1st byte of sector address #define REG_MMP_LBA2 (*(vu16*)0x08080000) // 2nd byte of sector address #define REG_MMP_LBA3 (*(vu16*)0x080A0000) // 3rd byte of sector address #define REG_MMP_LBA4 (*(vu16*)0x080C0000) // last nibble of sector address | 0xE0 #define MMP_DATA ((vu16*)0x09000000) // Pointer to buffer of CF data transered from card /*----------------------------------------------------------------- _MMCF_isInserted Is a compact flash card inserted? bool return OUT: true if a CF card is inserted -----------------------------------------------------------------*/ bool _MMCF_isInserted (void) { // Change register, then check if value did change REG_MMP_STS = CF_STS_INSERTED; return ((REG_MMP_STS & 0xff) == CF_STS_INSERTED); } /*----------------------------------------------------------------- _MMCF_clearStatus Tries to make the CF card go back to idle mode bool return OUT: true if a CF card is idle -----------------------------------------------------------------*/ bool _MMCF_clearStatus (void) { int i; // Wait until CF card is finished previous commands i=0; while ((REG_MMP_CMD & CF_STS_BUSY) && (i < CF_CARD_TIMEOUT)) { i++; } // Wait until card is ready for commands i = 0; while ((!(REG_MMP_STS & CF_STS_INSERTED)) && (i < CF_CARD_TIMEOUT)) { i++; } if (i >= CF_CARD_TIMEOUT) return false; return true; } /*----------------------------------------------------------------- _MMCF_readSectors Read 512 byte sector numbered "sector" into "buffer" u32 sector IN: address of first 512 byte sector on CF card to read u32 numSectors IN: number of 512 byte sectors to read, 1 to 256 sectors can be read void* buffer OUT: pointer to 512 byte buffer to store data in bool return OUT: true if successful -----------------------------------------------------------------*/ bool _MMCF_readSectors (u32 sector, u32 numSectors, void* buffer) { int i; u16 *buff = (u16*)buffer; #ifdef _CF_ALLOW_UNALIGNED u8 *buff_u8 = (u8*)buffer; int temp; #endif #if (defined _CF_USE_DMA) && (defined NDS) && (defined ARM9) DC_FlushRange( buffer, j * BYTES_PER_READ); #endif // Wait until CF card is finished previous commands i=0; while ((REG_MMP_CMD & CF_STS_BUSY) && (i < CF_CARD_TIMEOUT)) { i++; } // Wait until card is ready for commands i = 0; while ((!(REG_MMP_STS & CF_STS_INSERTED)) && (i < CF_CARD_TIMEOUT)) { i++; } if (i >= CF_CARD_TIMEOUT) return false; // Set number of sectors to read REG_MMP_SEC = (numSectors < 256 ? numSectors : 0); // Read a maximum of 256 sectors, 0 means 256 // Set read sector REG_MMP_LBA1 = sector & 0xFF; // 1st byte of sector number REG_MMP_LBA2 = (sector >> 8) & 0xFF; // 2nd byte of sector number REG_MMP_LBA3 = (sector >> 16) & 0xFF; // 3rd byte of sector number REG_MMP_LBA4 = ((sector >> 24) & 0x0F )| CF_CMD_LBA; // last nibble of sector number // Set command to read REG_MMP_CMD = CF_CMD_READ; while (numSectors--) { // Wait until card is ready for reading i = 0; while (((REG_MMP_STS & 0xff)!= CF_STS_READY) && (i < CF_CARD_TIMEOUT)) { i++; } if (i >= CF_CARD_TIMEOUT) return false; // Read data #ifdef _CF_USE_DMA #ifdef NDS DMA3_SRC = (u32)MMP_DATA; DMA3_DEST = (u32)buff; DMA3_CR = 256 | DMA_COPY_HALFWORDS | DMA_SRC_FIX; #else DMA3COPY ( MMP_DATA, buff, 256 | DMA16 | DMA_ENABLE | DMA_SRC_FIXED); #endif buff += BYTES_PER_READ / 2; #elif defined _CF_ALLOW_UNALIGNED i=256; if ((u32)buff_u8 & 0x01) { while(i--) { temp = *MMP_DATA; *buff_u8++ = temp & 0xFF; *buff_u8++ = temp >> 8; } } else { while(i--) *buff++ = *MMP_DATA; } #else i=256; while(i--) *buff++ = *MMP_DATA; #endif } #if (defined _CF_USE_DMA) && (defined NDS) // Wait for end of transfer before returning while(DMA3_CR & DMA_BUSY); #endif return true; } /*----------------------------------------------------------------- _MMCF_writeSectors Write 512 byte sector numbered "sector" from "buffer" u32 sector IN: address of 512 byte sector on CF card to read u32 numSectors IN: number of 512 byte sectors to read, 1 to 256 sectors can be read void* buffer IN: pointer to 512 byte buffer to read data from bool return OUT: true if successful -----------------------------------------------------------------*/ bool _MMCF_writeSectors (u32 sector, u32 numSectors, void* buffer) { int i; u16 *buff = (u16*)buffer; #ifdef _CF_ALLOW_UNALIGNED u8 *buff_u8 = (u8*)buffer; int temp; #endif #if defined _CF_USE_DMA && defined NDS && defined ARM9 DC_FlushRange( buffer, j * BYTES_PER_READ); #endif // Wait until CF card is finished previous commands i=0; while ((REG_MMP_CMD & CF_STS_BUSY) && (i < CF_CARD_TIMEOUT)) { i++; } // Wait until card is ready for commands i = 0; while ((!(REG_MMP_STS & CF_STS_INSERTED)) && (i < CF_CARD_TIMEOUT)) { i++; } if (i >= CF_CARD_TIMEOUT) return false; // Set number of sectors to write REG_MMP_SEC = (numSectors < 256 ? numSectors : 0); // Write a maximum of 256 sectors, 0 means 256 // Set write sector REG_MMP_LBA1 = sector & 0xFF; // 1st byte of sector number REG_MMP_LBA2 = (sector >> 8) & 0xFF; // 2nd byte of sector number REG_MMP_LBA3 = (sector >> 16) & 0xFF; // 3rd byte of sector number REG_MMP_LBA4 = ((sector >> 24) & 0x0F )| CF_CMD_LBA; // last nibble of sector number // Set command to write REG_MMP_CMD = CF_CMD_WRITE; while (numSectors--) { // Wait until card is ready for writing i = 0; while (((REG_MMP_STS & 0xff) != CF_STS_READY) && (i < CF_CARD_TIMEOUT)) { i++; } if (i >= CF_CARD_TIMEOUT) return false; // Write data #ifdef _CF_USE_DMA #ifdef NDS DMA3_SRC = (u32)buff; DMA3_DEST = (u32)MMP_DATA; DMA3_CR = 256 | DMA_COPY_HALFWORDS | DMA_DST_FIX; #else DMA3COPY( buff, MMP_DATA, 256 | DMA16 | DMA_ENABLE | DMA_DST_FIXED); #endif buff += BYTES_PER_READ / 2; #elif defined _CF_ALLOW_UNALIGNED i=256; if ((u32)buff_u8 & 0x01) { while(i--) { temp = *buff_u8++; temp |= *buff_u8++ << 8; *MMP_DATA = temp; } } else { while(i--) *MMP_DATA = *buff++; } #else i=256; while(i--) *MMP_DATA = *buff++; #endif } #if defined _CF_USE_DMA && defined NDS // Wait for end of transfer before returning while(DMA3_CR & DMA_BUSY); #endif return true; } /*----------------------------------------------------------------- _MMCF_Shutdown unload the GBAMP CF interface -----------------------------------------------------------------*/ bool _MMCF_shutdown(void) { return _MMCF_clearStatus() ; } /*----------------------------------------------------------------- _MMCF_startUp initializes the CF interface, returns true if successful, otherwise returns false -----------------------------------------------------------------*/ bool _MMCF_startUp(void) { // See if there is a read/write register u16 temp = REG_MMP_LBA1; REG_MMP_LBA1 = (~temp & 0xFF); temp = (~temp & 0xFF); if (!(REG_MMP_LBA1 == temp)) { return false; } // Make sure it is 8 bit REG_MMP_LBA1 = 0xAA55; if (REG_MMP_LBA1 == 0xAA55) { return false; } return true; } /*----------------------------------------------------------------- the actual interface structure -----------------------------------------------------------------*/ IO_INTERFACE _io_mmcf = { DEVICE_TYPE_MMCF, FEATURE_MEDIUM_CANREAD | FEATURE_MEDIUM_CANWRITE | FEATURE_SLOT_GBA, (FN_MEDIUM_STARTUP)&_MMCF_startUp, (FN_MEDIUM_ISINSERTED)&_MMCF_isInserted, (FN_MEDIUM_READSECTORS)&_MMCF_readSectors, (FN_MEDIUM_WRITESECTORS)&_MMCF_writeSectors, (FN_MEDIUM_CLEARSTATUS)&_MMCF_clearStatus, (FN_MEDIUM_SHUTDOWN)&_MMCF_shutdown } ;