////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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//
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//
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// Filename: sdspisim.h
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// Filename: sdspisim.h
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//
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//
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// Project: Wishbone Controlled SD-Card Controller over SPI port
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// Project: Wishbone Controlled SD-Card Controller over SPI port
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//
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//
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// Purpose: This library simulates the operation of a SPI commanded SD-Card,
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// Purpose: This library simulates the operation of a SPI commanded SD-Card,
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// such as might be found on a XuLA2-LX25 board made by xess.com.
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// such as might be found on a XuLA2-LX25 board made by xess.com.
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//
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//
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// This simulator is for testing use in a Verilator/C++ environment, where
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// This simulator is for testing use in a Verilator/C++ environment, where
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// it would be used in place of the actual hardware.
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// it would be used in place of the actual hardware.
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//
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//
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// Creator: Dan Gisselquist, Ph.D.
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// Creator: Dan Gisselquist, Ph.D.
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// Gisselquist Technology, LLC
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// Gisselquist Technology, LLC
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//
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//
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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//
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//
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// Copyright (C) 2015-2016, Gisselquist Technology, LLC
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// Copyright (C) 2015-2017, Gisselquist Technology, LLC
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//
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//
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// This program is free software (firmware): you can redistribute it and/or
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// This program is free software (firmware): you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as published
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// modify it under the terms of the GNU General Public License as published
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// by the Free Software Foundation, either version 3 of the License, or (at
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// by the Free Software Foundation, either version 3 of the License, or (at
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// your option) any later version.
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// your option) any later version.
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//
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
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// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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// for more details.
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//
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//
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// You should have received a copy of the GNU General Public License along
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// You should have received a copy of the GNU General Public License along
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// with this program. (It's in the $(ROOT)/doc directory, run make with no
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// with this program. (It's in the $(ROOT)/doc directory. Run make with no
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// target there if the PDF file isn't present.) If not, see
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// target there if the PDF file isn't present.) If not, see
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// <http://www.gnu.org/licenses/> for a copy.
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// <http://www.gnu.org/licenses/> for a copy.
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//
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//
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// License: GPL, v3, as defined and found on www.gnu.org,
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// License: GPL, v3, as defined and found on www.gnu.org,
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// http://www.gnu.org/licenses/gpl.html
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// http://www.gnu.org/licenses/gpl.html
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//
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//
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//
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//
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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//
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//
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//
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//
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#ifndef SDSPISIM_H
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#ifndef SDSPISIM_H
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#define SDSPISIM_H
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#define SDSPISIM_H
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typedef enum eRESET_STATES {
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typedef enum eRESET_STATES {
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SDSPI_POWERUP_RESET,
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SDSPI_POWERUP_RESET,
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SDSPI_CMD0_IDLE,
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SDSPI_CMD0_IDLE,
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SDSPI_RCVD_CMD8,
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SDSPI_RCVD_CMD8,
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SDSPI_RCVD_ACMD41,
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SDSPI_RCVD_ACMD41,
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SDSPI_RESET_COMPLETE,
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SDSPI_RESET_COMPLETE,
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SDSPI_IN_OPERATION
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SDSPI_IN_OPERATION
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} RESET_STATES;
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} RESET_STATES;
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#define SDSPI_RSPLEN 8
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#define SDSPI_RSPLEN 8
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#define SDSPI_MAXBLKLEN (1+2048+2)
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#define SDSPI_MAXBLKLEN (1+2048+2)
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#define SDSPI_CSDLEN (16)
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#define SDSPI_CSDLEN (16)
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#define SDSPI_CIDLEN (16)
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#define SDSPI_CIDLEN (16)
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class SDSPISIM {
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class SDSPISIM {
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FILE *m_dev;
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FILE *m_dev;
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unsigned long m_devblocks;
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unsigned long m_devblocks;
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int m_last_sck, m_delay, m_mosi;
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int m_last_sck, m_delay, m_mosi;
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bool m_busy, m_debug, m_block_address, m_altcmd_flag,
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bool m_busy, m_debug, m_block_address, m_altcmd_flag,
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m_syncd, m_host_supports_high_capacity, m_reading_data,
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m_syncd, m_host_supports_high_capacity, m_reading_data,
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m_have_token;
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m_have_token;
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RESET_STATES m_reset_state;
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RESET_STATES m_reset_state;
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int m_cmdidx, m_bitpos, m_rspidx, m_rspdly, m_blkdly,
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int m_cmdidx, m_bitpos, m_rspidx, m_rspdly, m_blkdly,
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m_blklen, m_blkidx, m_last_miso, m_powerup_busy,
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m_blklen, m_blkidx, m_last_miso, m_powerup_busy,
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m_rxloc;
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m_rxloc;
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char m_cmdbuf[8], m_dat_out, m_dat_in;
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char m_cmdbuf[8], m_dat_out, m_dat_in;
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char m_rspbuf[SDSPI_RSPLEN];
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char m_rspbuf[SDSPI_RSPLEN];
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char m_block_buf[SDSPI_MAXBLKLEN];
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char m_block_buf[SDSPI_MAXBLKLEN];
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char m_csd[SDSPI_CSDLEN], m_cid[SDSPI_CIDLEN];
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char m_csd[SDSPI_CSDLEN], m_cid[SDSPI_CIDLEN];
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public:
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public:
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SDSPISIM(void);
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SDSPISIM(const bool debug = false);
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void load(const char *fname);
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void load(const char *fname);
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void debug(const bool dbg) { m_debug = dbg; }
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void debug(const bool dbg) { m_debug = dbg; }
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bool debug(void) const { return m_debug; }
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bool debug(void) const { return m_debug; }
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int operator()(const int csn, const int sck, const int dat);
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int operator()(const int csn, const int sck, const int dat);
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unsigned cmdcrc(int ln, char *buf) const;
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unsigned cmdcrc(int ln, char *buf) const;
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bool check_cmdcrc(char *buf) const;
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bool check_cmdcrc(char *buf) const;
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unsigned blockcrc(int ln, char *buf) const;
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unsigned blockcrc(int ln, char *buf) const;
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void add_block_crc(int ln, char *buf) const;
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void add_block_crc(int ln, char *buf) const;
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};
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};
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#endif
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#endif
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