diff options
Diffstat (limited to 'backends/platform/ds/arm9/source/fat/io_sd_common.h')
| -rw-r--r-- | backends/platform/ds/arm9/source/fat/io_sd_common.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/backends/platform/ds/arm9/source/fat/io_sd_common.h b/backends/platform/ds/arm9/source/fat/io_sd_common.h new file mode 100644 index 0000000000..09abffab39 --- /dev/null +++ b/backends/platform/ds/arm9/source/fat/io_sd_common.h @@ -0,0 +1,114 @@ +/* + io_sd_common.h + + By chishm (Michael Chisholm) + + Common SD card routines + + SD routines partially based on sd.s by Romman + + 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. + + 2006-07-11 - Chishm + * Original release + + 2006-07-28 - Chishm + * Changed voltage range that the SD card can use +*/ + +#ifndef IO_SD_COMMON_H +#define IO_SD_COMMON_H + +#include "disc_io.h" + +/* SD commands */ +#define GO_IDLE_STATE 0 +#define ALL_SEND_CID 2 +#define SEND_RELATIVE_ADDR 3 +#define SELECT_CARD 7 +#define SEND_CSD 9 +#define STOP_TRANSMISSION 12 +#define SEND_STATUS 13 +#define GO_INACTIVE_STATE 15 +#define SET_BLOCKLEN 16 +#define READ_SINGLE_BLOCK 17 +#define READ_MULTIPLE_BLOCK 18 +#define WRITE_BLOCK 24 +#define WRITE_MULTIPLE_BLOCK 25 +#define APP_CMD 55 + +/* SD App commands */ +#define SET_BUS_WIDTH 6 +#define SD_APP_OP_COND 41 + +/* OCR (Operating Conditions Register) send value */ +//#define SD_OCR_VALUE 0x00030000 /* 2.8V to 3.0V */ +//#define SD_OCR_VALUE 0x003F8000 /* 2.7V to 3.4V */ +#define SD_OCR_VALUE 0x00FC0000 + +/* SD Data repsonses */ +#define SD_CARD_BUSY 0xff + +/* SD states */ +#define SD_STATE_IDLE 0 // Idle state, after power on or GO_IDLE_STATE command +#define SD_STATE_READY 1 // Ready state, after card replies non-busy to SD_APP_OP_COND +#define SD_STATE_IDENT 2 // Identification state, after ALL_SEND_CID +#define SD_STATE_STBY 3 // Standby state, when card is deselected +#define SD_STATE_TRAN 4 // Transfer state, after card is selected and ready for data transfer +#define SD_STATE_DATA 5 // +#define SD_STATE_RCV 6 // Receive data state +#define SD_STATE_PRG 7 // Programming state +#define SD_STATE_DIS 8 // Disconnect state +#define SD_STATE_INA 9 // Inactive state, after GO_INACTIVE_STATE + +#define READY_FOR_DATA 1 // bit 8 in card status + +/* +Calculate the CRC7 of a command and return it preshifted with +an end bit added +*/ +extern u8 _SD_CRC7(u8* data, int size); + +/* +Calculate the CRC16 of a block of data, ready for transmission on +four data lines at once +*/ +extern void _SD_CRC16 (u8* buff, int buffLength, u8* crc16buff); + +typedef bool (*_SD_FN_CMD_6BYTE_RESPONSE) (u8* responseBuffer, u8 command, u32 data); +typedef bool (*_SD_FN_CMD_17BYTE_RESPONSE) (u8* responseBuffer, u8 command, u32 data); + +/* +Initialise the SD card, after it has been sent into an Idle state +cmd_6byte_response: a pointer to a function that sends the SD card a command and gets a 6 byte response +cmd_17byte_response: a pointer to a function that sends the SD card a command and gets a 17 byte response +use4bitBus: initialise card to use a 4 bit data bus when communicating with the card +RCA: a pointer to the location to store the card's Relative Card Address, preshifted up by 16 bits. +*/ +extern bool _SD_InitCard (_SD_FN_CMD_6BYTE_RESPONSE cmd_6byte_response, + _SD_FN_CMD_17BYTE_RESPONSE cmd_17byte_response, + bool use4bitBus, + u32 *RCA); + +#endif // define IO_SD_COMMON_H |