src/peripherals/spi/spi.bsv

   1 /*
   2 Copyright (c) 2013, IIT Madras
   3 All rights reserved.
   4
   5 Redistribution and use in source and binary forms, with or without
   6 modification, are permitted provided that the following conditions
   7 are met:
   8
   9 *  Redistributions of source code must retain the above copyright notice,
  10    this list of conditions and the following disclaimer.
  11 *  Redistributions in binary form must reproduce the above copyright
  12    notice, this list of conditions and the following disclaimer in the
  13    documentation and/or other materials provided with the distribution.
  14 *  Neither the name of IIT Madras  nor the names of its contributors
  15    may be used to endorse or promote products derived from this software
  16    without specific prior written permission.
  17
  18 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22 HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  24 TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  25 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  26 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  27 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  28 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29 --------------------------------------------------------------------
  30 */
  31
  32 package spi;
  33
  34     import AXI4_Lite_Types   :: *;
  35     import AXI4_Lite_Fabric  :: *;
  36         import GetPut::*;
  37         import qspi::*;
  38     `include "instance_defines.bsv"
  39
  40
  41     (*always_ready, always_enabled*)
  42     interface SPI_out;
  43         interface Get#(Bit#(1)) clk_o;
  44         method Bit#(9) io0_sdio_ctrl;
  45         method Bit#(9) io1_sdio_ctrl;
  46         // index 0 is MOSI, index 1 is MISO.
  47         interface Get#(Bit#(2)) io_out;
  48         interface Get#(Bit#(2)) io_out_en;
  49         interface Put#(Bit#(2)) io_in;
  50         interface Get#(Bit#(1)) ncs_o;
  51     endinterface
  52
  53     interface Ifc_spi;
  54         interface SPI_out out;
  55                 interface AXI4_Lite_Slave_IFC#(`PADDR,`Reg_width,`USERSPACE) slave;
  56         // 0=TOF, 1=SMF, 2=Threshold, 3=TCF, 4=TEF 5 = request_ready
  57                 method Bit#(6) interrupts;
  58         endinterface
  59
  60
  61         (*synthesize*)
  62         module mkspi(Ifc_spi);
  63
  64     Ifc_qspi qspi <- mkqspi();
  65
  66     interface out = interface SPI_out
  67         method Bit#(9) io0_sdio_ctrl;
  68                 return qspi.out.io0_sdio_ctrl;
  69         endmethod
  70         method Bit#(9) io1_sdio_ctrl;
  71                 return qspi.out.io1_sdio_ctrl;
  72         endmethod
  73       interface io_out = interface Get
  74         method ActionValue#(Bit#(2)) get;
  75             return qspi.out.io_out[1:0];
  76         endmethod
  77       endinterface;
  78       interface io_out_en = interface Get
  79         method ActionValue#(Bit#(2)) get;
  80             return qspi.out.io_out_en[1:0];
  81         endmethod
  82       endinterface;
  83       interface io_in = interface Put
  84         method Action put(Bit#(2) in);
  85             Bit#(4) temp;
  86             temp[3] = 0;
  87             temp[2] = 0;
  88             temp[1] = in[1];
  89             temp[0] = in[0];
  90             qspi.out.io_in(temp);
  91         endmethod
  92       endinterface;
  93       interface clk_o = qspi.out.clk_o;
  94       interface ncs_o = qspi.ncs_o;
  95     endinterface;
  96
  97     interface slave = qspi.slave;
  98
  99   // 0=TOF, 1=SMF, 2=Threshold, 3=TCF, 4=TEF 5=request_ready
 100         method Bit#(6) interrupts;
 101                 return qspi.interripts;
 102         endmethod
 103
 104   endmodule
 105 endpackage