mirror of
https://github.com/rvtr/GodMode9i.git
synced 2025-06-19 03:05:43 -04:00
391 lines
11 KiB
C
391 lines
11 KiB
C
#ifndef NO_SDMMC
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#include <nds/bios.h>
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#include "sdmmc.h"
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#include <stddef.h>
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static struct mmcdevice deviceSD;
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//---------------------------------------------------------------------------------
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int geterror(struct mmcdevice *ctx) {
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//---------------------------------------------------------------------------------
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//if(ctx->error == 0x4) return -1;
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//else return 0;
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return (ctx->error << 29) >> 31;
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}
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//---------------------------------------------------------------------------------
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void setTarget(struct mmcdevice *ctx) {
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//---------------------------------------------------------------------------------
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sdmmc_mask16(REG_SDPORTSEL,0x3,(u16)ctx->devicenumber);
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setckl(ctx->clk);
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if (ctx->SDOPT == 0) {
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sdmmc_mask16(REG_SDOPT, 0, 0x8000);
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} else {
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sdmmc_mask16(REG_SDOPT, 0x8000, 0);
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}
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}
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//---------------------------------------------------------------------------------
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void sdmmc_send_command(struct mmcdevice *ctx, uint32_t cmd, uint32_t args) {
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//---------------------------------------------------------------------------------
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const bool getSDRESP = (cmd << 15) >> 31;
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u16 flags = (cmd << 15) >> 31;
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const bool readdata = cmd & 0x20000;
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const bool writedata = cmd & 0x40000;
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if(readdata || writedata)
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{
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flags |= TMIO_STAT0_DATAEND;
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}
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ctx->error = 0;
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while((sdmmc_read16(REG_SDSTATUS1) & TMIO_STAT1_CMD_BUSY)); //mmc working?
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sdmmc_write16(REG_SDIRMASK0,0);
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sdmmc_write16(REG_SDIRMASK1,0);
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sdmmc_write16(REG_SDSTATUS0,0);
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sdmmc_write16(REG_SDSTATUS1,0);
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sdmmc_mask16(REG_SDDATACTL32,0x1800,0x400); // Disable TX32RQ and RX32RDY IRQ. Clear fifo.
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sdmmc_write16(REG_SDCMDARG0,args &0xFFFF);
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sdmmc_write16(REG_SDCMDARG1,args >> 16);
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sdmmc_write16(REG_SDCMD,cmd &0xFFFF);
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u32 size = ctx->size;
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const u16 blkSize = sdmmc_read16(REG_SDBLKLEN32);
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u32 *rDataPtr32 = (u32*)ctx->rData;
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u8 *rDataPtr8 = ctx->rData;
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const u32 *tDataPtr32 = (u32*)ctx->tData;
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const u8 *tDataPtr8 = ctx->tData;
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bool rUseBuf = ( NULL != rDataPtr32 );
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bool tUseBuf = ( NULL != tDataPtr32 );
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u16 status0 = 0;
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while(1)
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{
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volatile u16 status1 = sdmmc_read16(REG_SDSTATUS1);
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#ifdef DATA32_SUPPORT
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volatile u16 ctl32 = sdmmc_read16(REG_SDDATACTL32);
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if((ctl32 & 0x100))
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#else
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if((status1 & TMIO_STAT1_RXRDY))
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#endif
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{
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if(readdata)
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{
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if(rUseBuf)
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{
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sdmmc_mask16(REG_SDSTATUS1, TMIO_STAT1_RXRDY, 0);
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if(size >= blkSize)
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{
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#ifdef DATA32_SUPPORT
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if(!((u32)rDataPtr32 & 3))
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{
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for(u32 i = 0; i < blkSize; i += 4)
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{
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*rDataPtr32++ = sdmmc_read32(REG_SDFIFO32);
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}
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}
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else
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{
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for(u32 i = 0; i < blkSize; i += 4)
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{
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u32 data = sdmmc_read32(REG_SDFIFO32);
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*rDataPtr8++ = data;
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*rDataPtr8++ = data >> 8;
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*rDataPtr8++ = data >> 16;
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*rDataPtr8++ = data >> 24;
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}
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}
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#else
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if(!((u32)rDataPtr16 & 1))
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{
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for(u32 i = 0; i < blkSize; i += 4)
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{
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*rDataPtr16++ = sdmmc_read16(REG_SDFIFO);
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}
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}
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else
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{
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for(u32 i = 0; i < blkSize; i += 4)
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{
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u16 data = sdmmc_read16(REG_SDFIFO);
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*rDataPtr8++ = data;
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*rDataPtr8++ = data >> 8;
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}
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}
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#endif
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size -= blkSize;
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}
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}
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sdmmc_mask16(REG_SDDATACTL32, 0x800, 0);
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}
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}
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#ifdef DATA32_SUPPORT
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if(!(ctl32 & 0x200))
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#else
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if((status1 & TMIO_STAT1_TXRQ))
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#endif
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{
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if(writedata)
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{
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if(tUseBuf)
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{
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sdmmc_mask16(REG_SDSTATUS1, TMIO_STAT1_TXRQ, 0);
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if(size >= blkSize)
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{
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#ifdef DATA32_SUPPORT
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if(!((u32)tDataPtr32 & 3))
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{
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for(u32 i = 0; i < blkSize; i += 4)
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{
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sdmmc_write32(REG_SDFIFO32, *tDataPtr32++);
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}
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}
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else
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{
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for(u32 i = 0; i < blkSize; i += 4)
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{
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u32 data = *tDataPtr8++;
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data |= (u32)*tDataPtr8++ << 8;
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data |= (u32)*tDataPtr8++ << 16;
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data |= (u32)*tDataPtr8++ << 24;
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sdmmc_write32(REG_SDFIFO32, data);
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}
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}
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#else
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if(!((u32)tDataPtr16 & 1))
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{
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for(u32 i = 0; i < blkSize; i += 2)
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{
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sdmmc_write16(REG_SDFIFO, *tDataPtr16++);
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}
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}
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else
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{
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for(u32 i = 0; i < blkSize; i += 2)
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{
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u16 data = *tDataPtr8++;
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data |= (u16)(*tDataPtr8++ << 8);
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sdmmc_write16(REG_SDFIFO, data);
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}
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}
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#endif
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size -= blkSize;
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}
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}
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sdmmc_mask16(REG_SDDATACTL32, 0x1000, 0);
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}
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}
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if(status1 & TMIO_MASK_GW)
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{
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ctx->error |= 4;
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break;
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}
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if(!(status1 & TMIO_STAT1_CMD_BUSY))
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{
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status0 = sdmmc_read16(REG_SDSTATUS0);
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if(sdmmc_read16(REG_SDSTATUS0) & TMIO_STAT0_CMDRESPEND)
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{
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ctx->error |= 0x1;
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}
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if(status0 & TMIO_STAT0_DATAEND)
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{
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ctx->error |= 0x2;
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}
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if((status0 & flags) == flags)
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break;
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}
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}
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ctx->stat0 = sdmmc_read16(REG_SDSTATUS0);
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ctx->stat1 = sdmmc_read16(REG_SDSTATUS1);
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sdmmc_write16(REG_SDSTATUS0,0);
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sdmmc_write16(REG_SDSTATUS1,0);
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if(getSDRESP != 0)
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{
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ctx->ret[0] = (u32)(sdmmc_read16(REG_SDRESP0) | (sdmmc_read16(REG_SDRESP1) << 16));
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ctx->ret[1] = (u32)(sdmmc_read16(REG_SDRESP2) | (sdmmc_read16(REG_SDRESP3) << 16));
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ctx->ret[2] = (u32)(sdmmc_read16(REG_SDRESP4) | (sdmmc_read16(REG_SDRESP5) << 16));
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ctx->ret[3] = (u32)(sdmmc_read16(REG_SDRESP6) | (sdmmc_read16(REG_SDRESP7) << 16));
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}
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}
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//---------------------------------------------------------------------------------
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static u32 calcSDSize(u8* csd, int type) {
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//---------------------------------------------------------------------------------
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u32 result = 0;
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if (type == -1) type = csd[14] >> 6;
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switch (type) {
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case 0:
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{
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u32 block_len = csd[9] & 0xf;
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block_len = 1 << block_len;
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u32 mult = (csd[4] >> 7) | ((csd[5] & 3) << 1);
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mult = 1 << (mult + 2);
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result = csd[8] & 3;
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result = (result << 8) | csd[7];
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result = (result << 2) | (csd[6] >> 6);
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result = (result + 1) * mult * block_len / 512;
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}
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break;
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case 1:
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result = csd[7] & 0x3f;
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result = (result << 8) | csd[6];
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result = (result << 8) | csd[5];
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result = (result + 1) * 1024;
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break;
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}
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return result;
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}
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//---------------------------------------------------------------------------------
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void sdmmc_controller_init(bool force) {
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//---------------------------------------------------------------------------------
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deviceSD.isSDHC = 0;
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deviceSD.SDOPT = 0;
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deviceSD.res = 0;
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deviceSD.initarg = 0;
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deviceSD.clk = 0x80;
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deviceSD.devicenumber = 0;
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*(vu16*)(SDMMC_BASE + REG_SDDATACTL32) &= 0xF7FFu;
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*(vu16*)(SDMMC_BASE + REG_SDDATACTL32) &= 0xEFFFu;
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#ifdef DATA32_SUPPORT
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*(vu16*)(SDMMC_BASE + REG_SDDATACTL32) |= 0x402u;
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#else
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*(vu16*)(SDMMC_BASE + REG_SDDATACTL32) |= 0x402u;
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#endif
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*(vu16*)(SDMMC_BASE + REG_SDDATACTL) = (*(vu16*)(SDMMC_BASE + REG_SDDATACTL) & 0xFFDD) | 2;
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#ifdef DATA32_SUPPORT
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*(vu16*)(SDMMC_BASE + REG_SDDATACTL32) &= 0xFFFFu;
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*(vu16*)(SDMMC_BASE + REG_SDDATACTL) &= 0xFFDFu;
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*(vu16*)(SDMMC_BASE + REG_SDBLKLEN32) = 512;
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#else
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*(vu16*)(SDMMC_BASE + REG_SDDATACTL32) &= 0xFFFDu;
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*(vu16*)(SDMMC_BASE + REG_SDDATACTL) &= 0xFFDDu;
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*(vu16*)(SDMMC_BASE + REG_SDBLKLEN32) = 0;
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#endif
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*(vu16*)(SDMMC_BASE + REG_SDBLKCOUNT32) = 1;
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*(vu16*)(SDMMC_BASE + REG_SDRESET) &= 0xFFFEu;
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*(vu16*)(SDMMC_BASE + REG_SDRESET) |= 1u;
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*(vu16*)(SDMMC_BASE + REG_SDIRMASK0) |= TMIO_MASK_ALL;
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*(vu16*)(SDMMC_BASE + REG_SDIRMASK1) |= TMIO_MASK_ALL>>16;
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*(vu16*)(SDMMC_BASE + 0x0fc) |= 0xDBu; //SDCTL_RESERVED7
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*(vu16*)(SDMMC_BASE + 0x0fe) |= 0xDBu; //SDCTL_RESERVED8
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*(vu16*)(SDMMC_BASE + REG_SDPORTSEL) &= 0xFFFCu;
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#ifdef DATA32_SUPPORT
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*(vu16*)(SDMMC_BASE + REG_SDCLKCTL) = 0x20;
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*(vu16*)(SDMMC_BASE + REG_SDOPT) = 0x40EE;
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#else
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*(vu16*)(SDMMC_BASE + REG_SDCLKCTL) = 0x40; //Nintendo sets this to 0x20
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*(vu16*)(SDMMC_BASE + REG_SDOPT) = 0x40EB; //Nintendo sets this to 0x40EE
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#endif
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*(vu16*)(SDMMC_BASE + REG_SDPORTSEL) &= 0xFFFCu;
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*(vu16*)(SDMMC_BASE + REG_SDBLKLEN) = 512;
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*(vu16*)(SDMMC_BASE + REG_SDSTOP) = 0;
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setTarget(&deviceSD);
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}
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//---------------------------------------------------------------------------------
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int sdmmc_sdcard_init() {
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//---------------------------------------------------------------------------------
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// We need to send at least 74 clock pulses.
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setTarget(&deviceSD);
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swiDelay(0x1980); // ~75-76 clocks
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// card reset
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sdmmc_send_command(&deviceSD,0,0);
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// CMD8 0x1AA
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sdmmc_send_command(&deviceSD,0x10408,0x1AA);
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u32 temp = (deviceSD.error & 0x1) << 0x1E;
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u32 temp2 = 0;
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do {
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do {
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// CMD55
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sdmmc_send_command(&deviceSD,0x10437,deviceSD.initarg << 0x10);
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// ACMD41
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sdmmc_send_command(&deviceSD,0x10769,0x00FF8000 | temp);
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temp2 = 1;
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} while ( !(deviceSD.error & 1) );
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} while((deviceSD.ret[0] & 0x80000000) == 0);
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if(!((deviceSD.ret[0] >> 30) & 1) || !temp)
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temp2 = 0;
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deviceSD.isSDHC = temp2;
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sdmmc_send_command(&deviceSD,0x10602,0);
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if (deviceSD.error & 0x4) return -1;
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sdmmc_send_command(&deviceSD,0x10403,0);
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if (deviceSD.error & 0x4) return -1;
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deviceSD.initarg = deviceSD.ret[0] >> 0x10;
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sdmmc_send_command(&deviceSD,0x10609,deviceSD.initarg << 0x10);
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if (deviceSD.error & 0x4) return -1;
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deviceSD.total_size = calcSDSize((u8*)&deviceSD.ret[0],-1);
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deviceSD.clk = 1;
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setckl(1);
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sdmmc_send_command(&deviceSD,0x10507,deviceSD.initarg << 0x10);
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if (deviceSD.error & 0x4) return -1;
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// CMD55
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sdmmc_send_command(&deviceSD,0x10437,deviceSD.initarg << 0x10);
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if (deviceSD.error & 0x4) return -1;
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// ACMD42
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sdmmc_send_command(&deviceSD,0x1076A,0x0);
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if (deviceSD.error & 0x4) return -1;
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// CMD55
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sdmmc_send_command(&deviceSD,0x10437,deviceSD.initarg << 0x10);
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if (deviceSD.error & 0x4) return -1;
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deviceSD.SDOPT = 1;
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sdmmc_send_command(&deviceSD,0x10446,0x2);
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if (deviceSD.error & 0x4) return -1;
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sdmmc_send_command(&deviceSD,0x1040D,deviceSD.initarg << 0x10);
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if (deviceSD.error & 0x4) return -1;
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sdmmc_send_command(&deviceSD,0x10410,0x200);
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if (deviceSD.error & 0x4) return -1;
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deviceSD.clk |= 0x200;
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return 0;
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}
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//---------------------------------------------------------------------------------
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int sdmmc_sdcard_readsectors(u32 sector_no, u32 numsectors, void *out) {
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//---------------------------------------------------------------------------------
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if (deviceSD.isSDHC == 0)
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sector_no <<= 9;
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setTarget(&deviceSD);
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sdmmc_write16(REG_SDSTOP,0x100);
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#ifdef DATA32_SUPPORT
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sdmmc_write16(REG_SDBLKCOUNT32,numsectors);
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sdmmc_write16(REG_SDBLKLEN32,0x200);
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#endif
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sdmmc_write16(REG_SDBLKCOUNT,numsectors);
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deviceSD.rData = out;
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deviceSD.size = numsectors << 9;
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sdmmc_send_command(&deviceSD,0x33C12,sector_no);
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return geterror(&deviceSD);
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}
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#endif |