1 /* 2 Copyright (c) 2015 Fabio Belavenuto & Victor Trucco 3 4 This program is free software: you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation, either version 3 of the License, or 7 (at your option) any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 #ifndef MMC_H 19 #define MMC_H 20 21 #include <arch/zxn.h> 22 23 #define CARDTYPE_NONE 0 24 #define CARDTYPE_MMC 1 25 #define CARDTYPE_SD 2 26 #define CARDTYPE_SDHC 3 27 28 #define EnableCard() (IO_SPI_CONTROL = 0xFE) 29 #define DisableCard() (IO_SPI_CONTROL = 0xFF) 30 31 #define SPI_slow() 32 #define SPI_fast() 33 34 // MMC commandset 35 36 #define CMD0 0x40 /*Resets the multimedia card*/ 37 #define CMD1 0x41 /*Activates the card's initialization process*/ 38 #define CMD2 0x42 /*--*/ 39 #define CMD3 0x43 /*--*/ 40 #define CMD4 0x44 /*--*/ 41 #define CMD5 0x45 /*reseved*/ 42 #define CMD6 0x46 /*reserved*/ 43 #define CMD7 0x47 /*--*/ 44 #define CMD8 0x48 /*reserved*/ 45 #define CMD9 0x49 /*CSD : Ask the selected card to send its card specific data*/ 46 #define CMD10 0x4a /*CID : Ask the selected card to send its card identification*/ 47 #define CMD11 0x4b /*--*/ 48 #define CMD12 0x4c /*--*/ 49 #define CMD13 0x4d /*Ask the selected card to send its status register*/ 50 #define CMD14 0x4e /*--*/ 51 #define CMD15 0x4f /*--*/ 52 #define CMD16 0x50 /*Select a block length (in bytes) for all following block commands (Read:between 1-512 and Write:only 512)*/ 53 #define CMD17 0x51 /*Reads a block of the size selected by the SET_BLOCKLEN command, the start address and block length must be set so that the data transferred will not cross a physical block boundry*/ 54 #define CMD18 0x52 /*--*/ 55 #define CMD19 0x53 /*reserved*/ 56 #define CMD20 0x54 /*--*/ 57 #define CMD21 0x55 /*reserved*/ 58 #define CMD22 0x56 /*reserved*/ 59 #define CMD23 0x57 /*reserved*/ 60 #define CMD24 0x58 /*Writes a block of the size selected by CMD16, the start address must be alligned on a sector boundry, the block length is always 512 bytes*/ 61 #define CMD25 0x59 /*--*/ 62 #define CMD26 0x5a /*--*/ 63 #define CMD27 0x5b /*Programming of the programmable bits of the CSD*/ 64 #define CMD28 0x5c /*If the card has write protection features, this command sets the write protection bit of the addressed group. The porperties of the write protection are coded in the card specific data (WP_GRP_SIZE)*/ 65 #define CMD29 0x5d /*If the card has write protection features, this command clears the write protection bit of the addressed group*/ 66 #define CMD30 0x5e /*If the card has write protection features, this command asks the card to send the status of the write protection bits. 32 write protection bits (representing 32 write protect groups starting at the specific address) followed by 16 CRD bits are transferred in a payload format via the data line*/ 67 #define CMD31 0x5f /*reserved*/ 68 #define CMD32 0x60 /*sets the address of the first sector of the erase group*/ 69 #define CMD33 0x61 /*Sets the address of the last sector in a cont. range within the selected erase group, or the address of a single sector to be selected for erase*/ 70 #define CMD34 0x62 /*Removes on previously selected sector from the erase selection*/ 71 #define CMD35 0x63 /*Sets the address of the first erase group within a range to be selected for erase*/ 72 #define CMD36 0x64 /*Sets the address of the last erase group within a continuos range to be selected for erase*/ 73 #define CMD37 0x65 /*Removes one previously selected erase group from the erase selection*/ 74 #define CMD38 0x66 /*Erases all previously selected sectors*/ 75 #define CMD39 0x67 /*--*/ 76 #define CMD40 0x68 /*--*/ 77 #define CMD41 0x69 /*reserved*/ 78 #define CMD42 0x6a /*reserved*/ 79 #define CMD43 0x6b /*reserved*/ 80 #define CMD44 0x6c /*reserved*/ 81 #define CMD45 0x6d /*reserved*/ 82 #define CMD46 0x6e /*reserved*/ 83 #define CMD47 0x6f /*reserved*/ 84 #define CMD48 0x70 /*reserved*/ 85 #define CMD49 0x71 /*reserved*/ 86 #define CMD50 0x72 /*reserved*/ 87 #define CMD51 0x73 /*reserved*/ 88 #define CMD52 0x74 /*reserved*/ 89 #define CMD53 0x75 /*reserved*/ 90 #define CMD54 0x76 /*reserved*/ 91 #define CMD55 0x77 /*reserved*/ 92 #define CMD56 0x78 /*reserved*/ 93 #define CMD57 0x79 /*reserved*/ 94 #define CMD58 0x7a /*reserved*/ 95 #define CMD59 0x7b /*Turns the CRC option ON or OFF. A '1' in the CRC option bit will turn the option ON, a '0' will turn it OFF*/ 96 #define CMD60 0x7c /*--*/ 97 #define CMD61 0x7d /*--*/ 98 #define CMD62 0x7e /*--*/ 99 #define CMD63 0x7f /*--*/ 100 101 unsigned char MMC_Init(void); 102 unsigned char MMC_Read(unsigned long lba, unsigned char *pReadBuffer) __z88dk_callee; 103 104 #endif 105