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596 lines
14 KiB
C
596 lines
14 KiB
C
/*
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io_njsd.c
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Hardware Routines for reading an SD card using
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a NinjaDS SD adapter.
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Original code supplied by NinjaMod
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Copyright (c) 2006 Michael "Chishm" Chisholm
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation and/or
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other materials provided with the distribution.
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3. The name of the author may not be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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2006-08-05 - Chishm
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* First release
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2006-08-06 - Chishm
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* Removed unneeded _NJSD_writeRAM function
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* Removed casts for calls to cardWriteCommand
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2006-08-07 - Chishm
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* Moved the SD initialization to a common function
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*/
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#include "io_njsd.h"
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#ifdef NDS
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#include <nds.h>
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#include <string.h>
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#include "io_sd_common.h"
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#define _NJSD_SYNC
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//---------------------------------------------------------------
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// Card communication speeds
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#define SD_CLK_167KHz 00
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#define SD_CLK_250KHz 01
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#define SD_CLK_5MHz 02
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#define SD_CLK_25MHz 03
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//---------------------------------------------------------------
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// Response types
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#define SD_RSP_48 0
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#define SD_RSP_136 1
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#define SD_RSP_DATA 2
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#define SD_RSP_STREAM 3
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//---------------------------------------------------------------
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// Send / receive timeouts, to stop infinite wait loops
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#define IRQ_TIMEOUT 1000000
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#define RESET_TIMEOUT 10000
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#define COMMAND_TIMEOUT 100000
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#define WRITE_TIMEOUT 3000 // Time to wait for the card to finish writing
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static const u8 _NJSD_read_cmd[8] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40};
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static const u8 _NJSD_read_end_cmd[8] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x4C, 0x00, 0x41};
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static int _NJSD_speed = SD_CLK_5MHz; // Default speed;
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static u32 _NJSD_cardFlags;
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static u32 _NJSD_relativeCardAddress = 0;
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static inline bool _NJSD_waitIRQ(void) {
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int i = IRQ_TIMEOUT;
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while (!(REG_IF & 0x100000) && --i);
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REG_IF = 0x100000;
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if (i <= 0) {
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return false;
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} else {
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return true;
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}
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}
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static inline void _NJSD_writeCardCommand
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(u8 cmd0, u8 cmd1, u8 cmd2, u8 cmd3, u8 cmd4, u8 cmd5, u8 cmd6, u8 cmd7)
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{
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CARD_COMMAND[0] = cmd0;
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CARD_COMMAND[1] = cmd1;
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CARD_COMMAND[2] = cmd2;
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CARD_COMMAND[3] = cmd3;
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CARD_COMMAND[4] = cmd4;
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CARD_COMMAND[5] = cmd5;
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CARD_COMMAND[6] = cmd6;
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CARD_COMMAND[7] = cmd7;
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}
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static bool _NJSD_reset (void) {
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int i;
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CARD_CR1H = CARD_CR1_ENABLE;
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_NJSD_writeCardCommand (0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
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CARD_CR2 = 0xA0406000;
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i = RESET_TIMEOUT;
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while ((CARD_CR2 & CARD_BUSY) && --i);
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if (i <= 0) {
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return false;
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}
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return true;
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}
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static bool _NJSD_init (u32 flags) {
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_NJSD_cardFlags = flags;
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REG_IF = 0x100000; // Clear cart IRQ.
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irqDisable (IRQ_CARD_LINE);
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if (! _NJSD_reset() ) {
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return false;
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}
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return true;
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}
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static bool _NJSD_sendCMDR (int speed, u8 *rsp_buf, int type, u8 cmd, u32 param) {
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int i;
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u32 data;
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#ifdef _NJSD_SYNC
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u32 old_REG_IME;
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old_REG_IME = REG_IME;
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REG_IME = 0;
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#endif
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REG_IF = 0x100000;
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CARD_CR1H = CARD_CR1_ENABLE;
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if ((type & 3) < 2) {
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CARD_COMMAND[0] = 0xF0 | (speed << 2) | 1 | (type << 1);
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} else if ((type & 3) == 2) {
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CARD_COMMAND[0] = 0xE0 | (speed << 2) | 0 | (1 << 1);
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} else {
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CARD_COMMAND[0] = 0xF0 | (speed << 2) | 0 | (1 << 1);
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}
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CARD_COMMAND[1] = (type & 0x40) | ((( type >> 2) & 7) << 3);
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CARD_COMMAND[2] = 0x40 | cmd;
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CARD_COMMAND[3] = (param>>24) & 0xFF;
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CARD_COMMAND[4] = (param>>16) & 0xFF;
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CARD_COMMAND[5] = (param>>8) & 0xFF;
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CARD_COMMAND[6] = (param>>0) & 0xFF;
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CARD_COMMAND[7] = 0; // offset = 0
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if ((type & 3) < 2) {
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CARD_CR2 = _NJSD_cardFlags | 0x01000000;
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// wait for ninja DS to be done!
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if (!_NJSD_waitIRQ ()) {
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#ifdef _NJSD_SYNC
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REG_IME = old_REG_IME;
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#endif
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return false;
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}
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i = 0;
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do {
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// Read data if available
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if (CARD_CR2 & CARD_DATA_READY) {
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data=CARD_DATA_RD;
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if (rsp_buf != NULL) {
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if (i == 4) {
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rsp_buf[0] = (data>>0)&0xFF;
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rsp_buf[1] = (data>>8)&0xFF;
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rsp_buf[2] = (data>>16)&0xFF;
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rsp_buf[3] = (data>>24)&0xFF;
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} else if (i == 5) {
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rsp_buf[4] = (data>>0)&0xFF;
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rsp_buf[5] = (data>>8)&0xFF;
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}
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}
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i++;
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}
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} while (CARD_CR2 & CARD_BUSY);
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} else {
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CARD_CR2 = _NJSD_cardFlags;
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while (CARD_CR2 & CARD_BUSY);
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// wait for ninja DS to be done!
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if (!_NJSD_waitIRQ ()) {
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#ifdef _NJSD_SYNC
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REG_IME = old_REG_IME;
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#endif
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return false;
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}
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}
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#ifdef _NJSD_SYNC
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REG_IME = old_REG_IME;
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#endif
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return true;
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}
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static bool _NJSD_writeSector (u8 *buffer, u8 *crc_buf, u32 offset) {
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int i;
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u8 responseBuffer[6];
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u32 data;
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#ifdef _NJSD_SYNC
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u32 old_REG_IME;
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old_REG_IME = REG_IME;
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REG_IME = 0;
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#endif
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CARD_CR1H = CARD_CR1_ENABLE;
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_NJSD_writeCardCommand (0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
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CARD_CR2 = 0xA0406000;
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i = COMMAND_TIMEOUT;
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while ((CARD_CR2 & CARD_BUSY) && --i);
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if (i <= 0) {
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#ifdef _NJSD_SYNC
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REG_IME = old_REG_IME;
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#endif
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return false;
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}
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for (i = 0; i < 65; i++)
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{
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CARD_CR1H = CARD_CR1_ENABLE; // | CARD_CR1_IRQ;
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if (i < 64)
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{
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_NJSD_writeCardCommand (buffer[i*8+0], buffer[i*8+1], buffer[i*8+2], buffer[i*8+3],
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buffer[i*8+4], buffer[i*8+5], buffer[i*8+6], buffer[i*8+7]);
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} else {
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_NJSD_writeCardCommand (crc_buf[0], crc_buf[1], crc_buf[2], crc_buf[3],
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crc_buf[4], crc_buf[5], crc_buf[6], crc_buf[7]);
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}
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CARD_CR2 = 0xA7406000;
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do {
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// Read data if available
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if (CARD_CR2 & CARD_DATA_READY) {
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data=CARD_DATA_RD;
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}
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} while (CARD_CR2 & CARD_BUSY);
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}
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CARD_CR1H = CARD_CR1_ENABLE;
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_NJSD_writeCardCommand (0xF0 | (1 << 2) | 1, 0x80, 0x40 | WRITE_BLOCK, (u8)(offset>>24),
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(u8)(offset>>16), (u8)(offset>>8), (u8)(offset>>0), 0x00);
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CARD_CR2 = 0xA7406000;
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// wait for ninja DS to be done!
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if (!_NJSD_waitIRQ ()) {
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#ifdef _NJSD_SYNC
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REG_IME = old_REG_IME;
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#endif
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return false;
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}
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i = 0;
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do {
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// Read data if available
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if (CARD_CR2 & CARD_DATA_READY) {
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data = CARD_DATA_RD;
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if (i == 2) {
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responseBuffer[0] = (u8)(data>>0);
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responseBuffer[1] = (u8)(data>>8);
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responseBuffer[2] = (u8)(data>>16);
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responseBuffer[3] = (u8)(data>>24);
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} else if (i == 3) {
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responseBuffer[4] = (u8)(data>>0);
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responseBuffer[5] = (u8)(data>>8);
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}
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i++;
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}
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} while (CARD_CR2 & CARD_BUSY);
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i = WRITE_TIMEOUT;
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responseBuffer[3] = 0;
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do {
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_NJSD_sendCMDR (SD_CLK_167KHz, responseBuffer, SD_RSP_48, SEND_STATUS, _NJSD_relativeCardAddress);
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i--;
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if (i <= 0) {
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#ifdef _NJSD_SYNC
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REG_IME = old_REG_IME;
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#endif
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return false;
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}
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} while (((responseBuffer[3] & 0x1f) != ((SD_STATE_TRAN << 1) | READY_FOR_DATA)));
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#ifdef _NJSD_SYNC
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REG_IME = old_REG_IME;
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#endif
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return true;
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}
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static bool _NJSD_sendCLK (int speed, int count) {
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int i;
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#ifdef _NJSD_SYNC
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u32 old_REG_IME;
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old_REG_IME = REG_IME;
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REG_IME = 0;
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REG_IF = 0x100000;
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#endif
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//CARD_CR1H = CARD_CR1_ENABLE; // | CARD_CR1_IRQ;
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_NJSD_writeCardCommand (0xE0 | ((speed & 3) << 2), 0, (count - 1), 0, 0, 0, 0, 0);
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CARD_CR2 = _NJSD_cardFlags;
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i = COMMAND_TIMEOUT;
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while ((CARD_CR2 & CARD_BUSY) && --i);
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if (i <= 0) {
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#ifdef _NJSD_SYNC
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REG_IME = old_REG_IME;
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#endif
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return false;
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}
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// wait for ninja DS to be done!
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if (!_NJSD_waitIRQ ()) {
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#ifdef _NJSD_SYNC
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REG_IME = old_REG_IME;
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#endif
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return false;
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}
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#ifdef _NJSD_SYNC
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REG_IME = old_REG_IME;
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#endif
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return true;
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}
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static bool _NJSD_sendCMDN (int speed, u8 cmd, u32 param) {
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int i;
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#ifdef _NJSD_SYNC
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u32 old_REG_IME;
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old_REG_IME = REG_IME;
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REG_IME = 0;
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#endif
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REG_IF = 0x100000;
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CARD_CR1H = CARD_CR1_ENABLE; // | CARD_CR1_IRQ;
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_NJSD_writeCardCommand (0xF0 | ((speed & 3) << 2), 0x00, 0x40 | cmd, (param>>24) & 0xFF,
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(param>>16) & 0xFF, (param>>8) & 0xFF, (param>>0) & 0xFF, 0x00);
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CARD_CR2 = _NJSD_cardFlags;
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i = COMMAND_TIMEOUT;
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while ((CARD_CR2 & CARD_BUSY) && --i);
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if (i <= 0) {
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#ifdef _NJSD_SYNC
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REG_IME = old_REG_IME;
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#endif
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return false;
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}
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// wait for ninja DS to be done!
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if (!_NJSD_waitIRQ ()) {
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#ifdef _NJSD_SYNC
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REG_IME = old_REG_IME;
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#endif
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return false;
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}
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#ifdef _NJSD_SYNC
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REG_IME = old_REG_IME;
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#endif
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return true;
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}
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bool _NJSD_cmd_6byte_response (u8* responseBuffer, u8 command, u32 data) {
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return _NJSD_sendCMDR (SD_CLK_167KHz, responseBuffer, SD_RSP_48, command, data);
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}
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bool _NJSD_cmd_17byte_response (u8* responseBuffer, u8 command, u32 data) {
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return _NJSD_sendCMDR (SD_CLK_167KHz, responseBuffer, SD_RSP_136, command, data);
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}
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static bool _NJSD_cardInit (void) {
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// If the commands succeed the first time, assume they'll always succeed
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if (! _NJSD_sendCLK (SD_CLK_167KHz, 256) ) {
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return false;
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}
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if (! _NJSD_sendCMDN (SD_CLK_167KHz, GO_IDLE_STATE, 0) ) {
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return false;
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}
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_NJSD_sendCLK (SD_CLK_167KHz, 8);
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_NJSD_sendCLK (SD_CLK_167KHz, 256);
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_NJSD_sendCMDN (SD_CLK_167KHz, GO_IDLE_STATE, 0);
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_NJSD_sendCLK (SD_CLK_167KHz, 8);
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return _SD_InitCard (_NJSD_cmd_6byte_response,
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_NJSD_cmd_17byte_response,
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true,
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&_NJSD_relativeCardAddress);
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}
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bool _NJSD_isInserted(void) {
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u8 responseBuffer [8];
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_NJSD_sendCMDR (SD_CLK_167KHz, responseBuffer, SD_RSP_48, SEND_STATUS, 0);
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// Make sure the card responded correctly
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if (responseBuffer[0] != SEND_STATUS) {
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return false;
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}
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return true;
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}
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bool _NJSD_clearStatus (void) {
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return _NJSD_reset();
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}
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bool _NJSD_shutdown(void) {
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return _NJSD_clearStatus();
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}
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bool _NJSD_startup(void) {
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if (! _NJSD_init(0xA0406000) ) {
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return false;
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}
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if (! _NJSD_cardInit() ) {
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return false;
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}
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return true;
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}
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bool _NJSD_writeSectors (u32 sector, u32 numSectors, const void* buffer) {
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u8 crc[8];
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u32 offset = sector * BYTES_PER_READ;
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u8* data = (u8*) buffer;
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while (numSectors--) {
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_SD_CRC16 ( data, BYTES_PER_READ, crc);
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if (! _NJSD_writeSector (data, crc, offset)) {
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return false;
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}
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offset += BYTES_PER_READ;
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data += BYTES_PER_READ;
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}
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return true;
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}
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#ifdef _IO_ALLOW_UNALIGNED
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bool _NJSD_readSectors (u32 sector, u32 numSectors, void* buffer) {
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u32 tmp[BYTES_PER_READ>>2];
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int i;
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#ifdef _NJSD_SYNC
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u32 old_REG_IME;
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#endif
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u8* tbuf = (u8*)buffer;
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if (numSectors == 0) {
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return false;
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}
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#ifdef _NJSD_SYNC
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old_REG_IME = REG_IME;
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REG_IME = 0;
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#endif
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if (numSectors > 1) {
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_NJSD_sendCMDR (_NJSD_speed, NULL, SD_RSP_DATA, READ_MULTIPLE_BLOCK, sector * BYTES_PER_READ);
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for (i = 0; i < numSectors - 2; i++) {
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if (((int)buffer & 0x03) != 0){
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cardPolledTransfer (0xA1406000, tmp, BYTES_PER_READ, (u8*)_NJSD_read_cmd);
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memcpy (tbuf + i * BYTES_PER_READ, tmp, BYTES_PER_READ);
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} else {
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cardPolledTransfer (0xA1406000, (u32*)(tbuf + i * BYTES_PER_READ), BYTES_PER_READ,(u8*)_NJSD_read_cmd);
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}
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if (!_NJSD_waitIRQ ()) {
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#ifdef _NJSD_SYNC
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REG_IME = old_REG_IME;
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#endif
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return false;
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}
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}
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if (((int)buffer & 0x03) != 0){
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cardPolledTransfer (0xA1406000, tmp, BYTES_PER_READ, (u8*)_NJSD_read_end_cmd);
|
|
memcpy (tbuf + (numSectors - 2) * BYTES_PER_READ, tmp, BYTES_PER_READ);
|
|
} else {
|
|
cardPolledTransfer (0xA1406000, (u32*)(tbuf + (numSectors - 2) * BYTES_PER_READ), BYTES_PER_READ, (u8*)_NJSD_read_end_cmd);
|
|
}
|
|
if (!_NJSD_waitIRQ ()) {
|
|
#ifdef _NJSD_SYNC
|
|
REG_IME = old_REG_IME;
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
if (((int)buffer & 0x03) != 0){
|
|
cardPolledTransfer (0xA1406000, tmp, BYTES_PER_READ, (u8*)_NJSD_read_cmd);
|
|
memcpy (tbuf + (numSectors - 1) * BYTES_PER_READ, tmp, BYTES_PER_READ);
|
|
} else {
|
|
cardPolledTransfer (0xA1406000, (u32*)(tbuf + (numSectors - 1) * BYTES_PER_READ), BYTES_PER_READ, (u8*)_NJSD_read_cmd);
|
|
}
|
|
} else {
|
|
_NJSD_sendCMDR (_NJSD_speed, NULL, SD_RSP_STREAM, READ_SINGLE_BLOCK, sector * BYTES_PER_READ);
|
|
if (((int)buffer & 0x03) != 0){
|
|
cardPolledTransfer (0xA1406000, tmp, BYTES_PER_READ, (u8*)_NJSD_read_cmd);
|
|
memcpy (tbuf, tmp, BYTES_PER_READ);
|
|
} else {
|
|
cardPolledTransfer (0xA1406000, (u32*)tbuf, BYTES_PER_READ, (u8*)_NJSD_read_cmd);
|
|
}
|
|
}
|
|
|
|
#ifdef _NJSD_SYNC
|
|
REG_IME = old_REG_IME;
|
|
#endif
|
|
return true;
|
|
}
|
|
#else // not defined _IO_ALLOW_UNALIGNED
|
|
bool _NJSD_readSectors (u32 sector, u32 numSectors, void* buffer) {
|
|
int i;
|
|
|
|
#ifdef _NJSD_SYNC
|
|
u32 old_REG_IME;
|
|
#endif
|
|
|
|
u8* tbuf = (u8*)buffer;
|
|
|
|
if (numSectors == 0) {
|
|
return false;
|
|
}
|
|
|
|
#ifdef _NJSD_SYNC
|
|
old_REG_IME = REG_IME;
|
|
REG_IME = 0;
|
|
#endif
|
|
|
|
if (numSectors > 1) {
|
|
_NJSD_sendCMDR (_NJSD_speed, NULL, SD_RSP_DATA, READ_MULTIPLE_BLOCK, sector * BYTES_PER_READ);
|
|
for (i = 0; i < numSectors - 2; i++) {
|
|
cardPolledTransfer (0xA1406000, (u32*)(tbuf + i * BYTES_PER_READ), BYTES_PER_READ, _NJSD_read_cmd);
|
|
if (!_NJSD_waitIRQ ()) {
|
|
#ifdef _NJSD_SYNC
|
|
REG_IME = old_REG_IME;
|
|
#endif
|
|
return false;
|
|
}
|
|
}
|
|
cardPolledTransfer (0xA1406000, (u32*)(tbuf + (numSectors - 2) * BYTES_PER_READ), BYTES_PER_READ, _NJSD_read_end_cmd);
|
|
if (!_NJSD_waitIRQ ()) {
|
|
#ifdef _NJSD_SYNC
|
|
REG_IME = old_REG_IME;
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
cardPolledTransfer (0xA1406000, (u32*)(tbuf + (numSectors - 1) * BYTES_PER_READ), BYTES_PER_READ, _NJSD_read_cmd);
|
|
} else {
|
|
_NJSD_sendCMDR (_NJSD_speed, NULL, SD_RSP_STREAM, READ_SINGLE_BLOCK, sector * BYTES_PER_READ);
|
|
cardPolledTransfer (0xA1406000, (u32*)tbuf, BYTES_PER_READ, _NJSD_read_cmd);
|
|
}
|
|
|
|
#ifdef _NJSD_SYNC
|
|
REG_IME = old_REG_IME;
|
|
#endif
|
|
return true;
|
|
}
|
|
#endif // _IO_ALLOW_UNALIGNED
|
|
|
|
const IO_INTERFACE _io_njsd = {
|
|
DEVICE_TYPE_NJSD,
|
|
FEATURE_MEDIUM_CANREAD | FEATURE_MEDIUM_CANWRITE | FEATURE_SLOT_NDS,
|
|
(FN_MEDIUM_STARTUP)&_NJSD_startup,
|
|
(FN_MEDIUM_ISINSERTED)&_NJSD_isInserted,
|
|
(FN_MEDIUM_READSECTORS)&_NJSD_readSectors,
|
|
(FN_MEDIUM_WRITESECTORS)&_NJSD_writeSectors,
|
|
(FN_MEDIUM_CLEARSTATUS)&_NJSD_clearStatus,
|
|
(FN_MEDIUM_SHUTDOWN)&_NJSD_shutdown
|
|
} ;
|
|
|
|
#endif // defined NDS
|