// Copyright 2016 ETH Zurich and University of Bologna.
// Copyright and related rights are licensed under the Solderpad Hardware
// License, Version 0.51 (the “License”); you may not use this file except in
// compliance with the License. You may obtain a copy of the License at
// http://solderpad.org/licenses/SHL-0.51. Unless required by applicable law
// or agreed to in writing, software, hardware and materials distributed under
// this License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR
// CONDITIONS OF ANY KIND, either express or implied. See the License for the
// specific language governing permissions and limitations under the License.

/**
 * @file
 * @brief SPI library.
 *
 * Provides SPI helper function like configuring SPI and sending
 * data and commands over SPI.
 *
 */
#ifndef _SPI_H_
#define _SPI_H_

#include <pulpino.h>

#define SPI_QPI    1
#define SPI_NO_QPI 0

#define SPI_CMD_RD    0
#define SPI_CMD_WR    1
#define SPI_CMD_QRD   2
#define SPI_CMD_QWR   3
#define SPI_CMD_SWRST 4

#define SPI_CSN0 0
#define SPI_CSN1 1
#define SPI_CSN2 2
#define SPI_CSN3 3

#define SPI_REG_STATUS                ( SPI_BASE_ADDR + 0x00 )
#define SPI_REG_CLKDIV                ( SPI_BASE_ADDR + 0x04 )
#define SPI_REG_SPICMD                ( SPI_BASE_ADDR + 0x08 )
#define SPI_REG_SPIADR                ( SPI_BASE_ADDR + 0x0C )
#define SPI_REG_SPILEN                ( SPI_BASE_ADDR + 0x10 )
#define SPI_REG_SPIDUM                ( SPI_BASE_ADDR + 0x14 )
#define SPI_REG_TXFIFO                ( SPI_BASE_ADDR + 0x18 )
#define SPI_REG_RXFIFO                ( SPI_BASE_ADDR + 0x20 )
#define SPI_REG_INTCFG                ( SPI_BASE_ADDR + 0x24 )
#define SPI_REG_INTSTA                ( SPI_BASE_ADDR + 0x28 )

#define SPI_STATUS			REG(SPI_REG_STATUS)              
#define SPI_CLKDIV 			REG(SPI_REG_CLKDIV)              
#define SPI_SPICMD 			REG(SPI_REG_SPICMD)              
#define SPI_SPIADR			REG(SPI_REG_SPIADR)               
#define SPI_SPILEN			REG(SPI_REG_SPILEN)               
#define SPI_SPIDUM                	REG(SPI_REG_SPIDUM)	
#define SPI_TXFIFO			REG(SPI_REG_TXFIFO)          
#define SPI_RXFIFO			REG(SPI_REG_RXFIFO)           
#define SPI_INTCFG   			REG(SPI_REG_INTCFG)            
#define SPI_INTSTA			REG(SPI_REG_INTSTA)       

#define PIN_SSPI_SIO0 4
#define PIN_SSPI_SIO1 5
#define PIN_SSPI_SIO2 6
#define PIN_SSPI_SIO3 7
#define PIN_SSPI_CSN  3

#define PIN_MSPI_SIO0 15
#define PIN_MSPI_SIO1 14
#define PIN_MSPI_SIO2 13
#define PIN_MSPI_SIO3 12
#define PIN_MSPI_CSN0 16
#define PIN_MSPI_CSN1 11
#define PIN_MSPI_CSN2 0
#define PIN_MSPI_CSN3 1

#define FUNC_SPI  0

void spi_setup_slave();

void spi_setup_master(int numcs);

void spi_send_data_noaddr(int cmd, char *data, int datalen, int useQpi);

void spi_setup_cmd_addr(int cmd, int cmdlen, int addr, int addrlen);

void spi_set_datalen(int datalen);

void spi_setup_dummy(int dummy_rd, int dummy_wr);

void spi_start_transaction(int trans_type, int csnum);

void spi_write_fifo(int *data, int datalen);

void spi_read_fifo(int *data, int datalen);

int spi_get_status();

#endif // _SPI_H_