src/firmware/scsiPhy.h

   1 //      Copyright (C) 2013 Michael McMaster <michael@codesrc.com>
   2 //
   3 //      This file is part of SCSI2SD.
   4 //
   5 //      SCSI2SD is free software: you can redistribute it and/or modify
   6 //      it under the terms of the GNU General Public License as published by
   7 //      the Free Software Foundation, either version 3 of the License, or
   8 //      (at your option) any later version.
   9 //
  10 //      SCSI2SD is distributed in the hope that it will be useful,
  11 //      but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 //      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 //      GNU General Public License for more details.
  14 //
  15 //      You should have received a copy of the GNU General Public License
  16 //      along with SCSI2SD.  If not, see <http://www.gnu.org/licenses/>.
  17 #ifndef SCSIPHY_H
  18 #define SCSIPHY_H
  19
  20 #define SCSI_CTRL_IDMASK ((volatile uint8_t*)0x60000000)
  21 #define SCSI_CTRL_PHASE ((volatile uint8_t*)0x60000001)
  22 #define SCSI_CTRL_BSY ((volatile uint8_t*)0x60000002)
  23 #define SCSI_FIFO_SEL ((volatile uint8_t*)0x60000003)
  24 #define SCSI_DATA_CNT_HI ((volatile uint8_t*)0x60000004)
  25 #define SCSI_DATA_CNT_LO ((volatile uint8_t*)0x60000005)
  26 #define SCSI_DATA_CNT_SET ((volatile uint8_t*)0x60000006)
  27 #define SCSI_CTRL_DBX ((volatile uint8_t*)0x60000007)
  28 #define SCSI_CTRL_SYNC_OFFSET ((volatile uint8_t*)0x60000008)
  29 #define SCSI_CTRL_TIMING ((volatile uint8_t*)0x60000009)
  30 #define SCSI_CTRL_TIMING2 ((volatile uint8_t*)0x6000000A)
  31
  32 #define SCSI_STS_FIFO ((volatile uint8_t*)0x60000010)
  33 #define SCSI_STS_ALTFIFO ((volatile uint8_t*)0x60000011)
  34 #define SCSI_STS_FIFO_COMPLETE ((volatile uint8_t*)0x60000012)
  35 #define SCSI_STS_SELECTED ((volatile uint8_t*)0x60000013)
  36 #define SCSI_STS_SCSI ((volatile uint8_t*)0x60000014)
  37 #define SCSI_STS_DBX ((volatile uint8_t*)0x60000015)
  38
  39 #define SCSI_FIFO_DATA ((volatile uint8_t*)0x60000020)
  40 #define SCSI_FIFO_DEPTH 512
  41
  42
  43 #define scsiPhyFifoFull() ((*SCSI_STS_FIFO & 0x01) == 0x01)
  44 #define scsiPhyFifoEmpty() ((*SCSI_STS_FIFO & 0x02) == 0x02)
  45 #define scsiPhyFifoAltEmpty() ((*SCSI_STS_ALTFIFO & 0x02) == 0x02)
  46
  47 #define scsiPhyFifoFlip() \
  48 {\
  49         scsiPhyFifoSel ^= 1; \
  50         *SCSI_FIFO_SEL = scsiPhyFifoSel; \
  51 }
  52
  53 #define scsiPhyTx(val) *SCSI_FIFO_DATA = (val)
  54 #define scsiPhyRx() *SCSI_FIFO_DATA
  55 #define scsiPhyComplete() ((*SCSI_STS_FIFO_COMPLETE & 0x01) == 0x01)
  56
  57 #define scsiStatusATN() ((*SCSI_STS_SCSI & 0x01) == 0x01)
  58 #define scsiStatusBSY() ((*SCSI_STS_SCSI & 0x02) == 0x02)
  59 #define scsiStatusRST() ((*SCSI_STS_SCSI & 0x04) == 0x04)
  60 #define scsiStatusSEL() ((*SCSI_STS_SCSI & 0x08) == 0x08)
  61 #define scsiStatusACK() ((*SCSI_STS_SCSI & 0x10) == 0x10)
  62
  63 // Disable DMA due to errate with the STM32F205 DMA2 controller when
  64 // concurrently transferring FSMC (with FIFO) and APB (ie. sdio)
  65 // peripherals.
  66 #undef SCSI_FSMC_DMA
  67
  68 extern uint8_t scsiPhyFifoSel;
  69
  70 void scsiPhyInit(void);
  71 void scsiPhyConfig(void);
  72 void scsiPhyReset(void);
  73
  74 void scsiEnterPhase(int phase);
  75 void scsiEnterBusFree(void);
  76
  77 void scsiWrite(const uint8_t* data, uint32_t count);
  78 void scsiRead(uint8_t* data, uint32_t count);
  79 void scsiWriteByte(uint8_t value);
  80 uint8_t scsiReadByte(void);
  81
  82
  83 void sdTmpRead(uint8_t* data, uint32_t lba, int sectors);
  84 void sdTmpWrite(uint8_t* data, uint32_t lba, int sectors);
  85 #if 0
  86
  87 // Contains the odd-parity flag for a given 8-bit value.
  88 extern const uint8_t Lookup_OddParity[256];
  89
  90 #endif
  91
  92 extern volatile uint8_t scsiRxDMAComplete;
  93 extern volatile uint8_t scsiTxDMAComplete;
  94 #define scsiDMABusy() (!(scsiRxDMAComplete && scsiTxDMAComplete))
  95
  96 void scsiReadDMA(uint8_t* data, uint32_t count);
  97 int scsiReadDMAPoll();
  98
  99 void scsiWriteDMA(const uint8_t* data, uint32_t count);
 100 int scsiWriteDMAPoll();
 101
 102 int scsiSelfTest(void);
 103
 104 #endif