mirror of
https://github.com/openhwgroup/cvw
synced 2025-01-24 13:34:28 +00:00
70 lines
2.4 KiB
C
70 lines
2.4 KiB
C
///////////////////////////////////////////
|
|
// SDC.sv
|
|
//
|
|
// Written: Rose Thompson September 25, 2021
|
|
// Modified:
|
|
//
|
|
// Purpose: driver for sdc reader.
|
|
//
|
|
// A component of the Wally configurable RISC-V project.
|
|
//
|
|
// Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
|
|
// files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
|
|
// modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
|
|
// is furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
|
|
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
// BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
|
|
// OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
///////////////////////////////////////////
|
|
|
|
|
|
#include "sdcDriver.h"
|
|
|
|
#define SDC_MAIL_BOX 0x12100
|
|
|
|
void copySDC512(long int blockAddr, long int * Dst) {
|
|
|
|
waitInitSDC();
|
|
|
|
volatile long int * mailBoxAddr;
|
|
volatile int * mailBoxCmd;
|
|
volatile int * mailBoxStatus;
|
|
volatile long int * mailBoxReadData;
|
|
mailBoxStatus = (int *) (SDC_MAIL_BOX + 0x4);
|
|
mailBoxCmd = (int *) (SDC_MAIL_BOX + 0x8);
|
|
mailBoxAddr = (long int *) (SDC_MAIL_BOX + 0x10);
|
|
mailBoxReadData = (long int *) (SDC_MAIL_BOX + 0x18);
|
|
|
|
// write the SDC address register with the blockAddr
|
|
*mailBoxAddr = blockAddr;
|
|
*mailBoxCmd = 0x4;
|
|
|
|
// wait until the mailbox has valid data
|
|
// this occurs when status[1] = 0
|
|
while((*mailBoxStatus & 0x2) == 0x2);
|
|
|
|
int index;
|
|
for(index = 0; index < 512/8; index++) {
|
|
Dst[index] = *mailBoxReadData;
|
|
}
|
|
}
|
|
|
|
volatile void waitInitSDC(){
|
|
volatile int * mailBoxStatus;
|
|
mailBoxStatus = (int *) (SDC_MAIL_BOX + 0x4);
|
|
while((*mailBoxStatus & 0x1) != 0x1);
|
|
}
|
|
|
|
void setSDCCLK(int divider){
|
|
divider = (1 - (divider >> 1));
|
|
volatile int * mailBoxCLK;
|
|
mailBoxCLK = (int *) (SDC_MAIL_BOX + 0x0);
|
|
*mailBoxCLK = divider;
|
|
}
|