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// license:BSD-3-Clause
// copyright-holders:R. Belmont
#ifndef MAME_MACHINE_SPI_SDCARD_H
#define MAME_MACHINE_SPI_SDCARD_H
#pragma once
#include "imagedev/harddriv.h"
class spi_sdcard_device : public device_t
{
public:
// SPI 4-wire interface
auto spi_miso_callback() { return write_miso.bind(); }
void spi_clock_w(int state);
void spi_ss_w(int state) { m_ss = state; }
void spi_mosi_w(int state) { m_in_bit = state; }
bool get_card_present() { return !(m_harddisk == nullptr); }
devcb_write_line write_miso;
protected:
enum sd_type : u8
{
SD_TYPE_V2 = 0,
SD_TYPE_HC
};
spi_sdcard_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, const XTAL &clock);
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_add_mconfig(machine_config &config) override;
required_device<harddisk_image_device> m_image;
sd_type m_type;
private:
enum sd_state : u8
{
//REF Table 4-1:Overview of Card States vs. Operation Mode
SD_STATE_IDLE = 0,
SD_STATE_READY,
SD_STATE_IDENT,
SD_STATE_STBY,
SD_STATE_TRAN,
SD_STATE_DATA,
SD_STATE_DATA_MULTI, // synthetical state for this implementation
SD_STATE_RCV,
SD_STATE_PRG,
SD_STATE_DIS,
SD_STATE_INA,
//FIXME Existing states which must be revisited
SD_STATE_WRITE_WAITFE,
SD_STATE_WRITE_DATA
};
sd_state m_state;
// MMFS for Acorn machines expect dummy byte before response
static constexpr int SPI_DELAY_RESPONSE = 1;
void send_data(u16 count, sd_state new_state);
void do_command();
void change_state(sd_state new_state);
void latch_in();
void shift_out();
u8 m_data[520], m_cmd[6];
hard_disk_file *m_harddisk;
int m_ss, m_in_bit, m_clk_state;
u8 m_in_latch, m_out_latch, m_cur_bit;
u16 m_out_count, m_out_ptr, m_write_ptr, m_blksize;
u32 m_blknext;
bool m_bACMD;
};
class spi_sdcard_sdhc_device : public spi_sdcard_device
{
public:
spi_sdcard_sdhc_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
};
class spi_sdcard_sdv2_device : public spi_sdcard_device
{
public:
spi_sdcard_sdv2_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
};
DECLARE_DEVICE_TYPE(SPI_SDCARD, spi_sdcard_sdhc_device)
DECLARE_DEVICE_TYPE(SPI_SDCARDV2, spi_sdcard_sdv2_device)
#endif // MAME_MACHINE_SPI_SDCARD_H
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