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https://github.com/d0k3/GodMode9.git
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2ceafc545b
For some reason (messed up memory access?) the first two time I read the status register, I get garbage. Also: * Reinserting card breaks SPI (everything reads 0xff * No support for CTR carts for now
97 lines
2.9 KiB
C
97 lines
2.9 KiB
C
#pragma once
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/*
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* This file is part of fastboot 3DS
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* Copyright (C) 2019 derrek, profi200
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "types.h"
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// REG_NSPI_CNT
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#define NSPI_CNT_BUS_1BIT (0u)
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#define NSPI_CNT_BUS_4BIT (1u<<12)
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#define NSPI_CNT_DIRE_READ (0u)
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#define NSPI_CNT_DIRE_WRITE (1u<<13)
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#define NSPI_CNT_ENABLE (1u<<15)
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// REG_NSPI_DONE
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#define NSPI_DONE (0u)
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// REG_NSPI_STATUS
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#define NSPI_STATUS_BUSY (1u)
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// REG_NSPI_AUTOPOLL
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#define NSPI_AUTOPOLL_START (1u<<31)
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// REG_NSPI_INT_MASK Bit set = disabled.
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// REG_NSPI_INT_STAT Status and aknowledge.
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#define NSPI_INT_TRANSF_END (1u) // Fires on (each?) auto poll try aswell
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#define NSPI_INT_AP_SUCCESS (1u<<1) // Auto poll
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#define NSPI_INT_AP_TIMEOUT (1u<<2) // Auto poll
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typedef enum
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{
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NSPI_CLK_512KHz = 0u,
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NSPI_CLK_1MHz = 1u,
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NSPI_CLK_2MHz = 2u,
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NSPI_CLK_4MHz = 3u,
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NSPI_CLK_8MHz = 4u,
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NSPI_CLK_16MHz = 5u
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} NspiClk;
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/**
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* @brief Initializes the SPI buses. Call this only once.
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*/
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void SPICARD_init(void);
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/**
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* @brief Automatically polls a bit of the command response. Use with the macro below.
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*
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* @param[in] params The parameters. Use the macro below.
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*
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* @return Returns false on failure/timeout and true on success.
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*/
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bool _SPICARD_autoPollBit(u32 params);
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/**
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* @brief Writes and/or reads data to/from a SPI device.
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*
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* @param[in] clk The clock frequency to use.
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* @param[in] in Input data pointer for write.
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* @param out Output data pointer for read.
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* @param[in] inSize Input size. Must be <= 0x1FFFFF.
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* @param[in] outSize Output size. Must be <= 0x1FFFFF.
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* @param[in] done Set to true if this is the last transfer (chip select).
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*/
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void SPICARD_writeRead(NspiClk clk, const u32 *in, u32 *out, u32 inSize, u32 outSize, bool done);
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/**
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* @brief Automatically polls a bit of the command response.
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*
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* @param[in] cmd The command.
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* @param[in] timeout The timeout. Must be 0-15. Tries = 31<<NspiClk + timeout.
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* @param[in] off The bit offset. Must be 0-7.
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* @param[in] bitSet Poll for a set ur unset bit.
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*
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* @return Returns false on failure/timeout and true on success.
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*/
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#define SPICARD_autoPollBit(cmd, timeout, off, bitSet) _SPICARD_autoPollBit((bitSet)<<30 | (off)<<24 | (timeout)<<16 | (cmd))
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