include/hw/ssi/imx_spi.h

   1 /*
   2  * IMX SPI Controller
   3  *
   4  * Copyright 2016 Jean-Christophe Dubois <jcd@tribudubois.net>
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7  * See the COPYING file in the top-level directory.
   8  */
   9
  10 #ifndef IMX_SPI_H
  11 #define IMX_SPI_H
  12
  13 #include "hw/sysbus.h"
  14 #include "hw/ssi/ssi.h"
  15 #include "qemu/bitops.h"
  16 #include "qemu/fifo32.h"
  17
  18 #define ECSPI_FIFO_SIZE 64
  19
  20 #define ECSPI_RXDATA 0
  21 #define ECSPI_TXDATA 1
  22 #define ECSPI_CONREG 2
  23 #define ECSPI_CONFIGREG 3
  24 #define ECSPI_INTREG 4
  25 #define ECSPI_DMAREG 5
  26 #define ECSPI_STATREG 6
  27 #define ECSPI_PERIODREG 7
  28 #define ECSPI_TESTREG 8
  29 #define ECSPI_MSGDATA 16
  30 #define ECSPI_MAX 17
  31
  32 /* ECSPI_CONREG */
  33 #define ECSPI_CONREG_EN (1 << 0)
  34 #define ECSPI_CONREG_HT (1 << 1)
  35 #define ECSPI_CONREG_XCH (1 << 2)
  36 #define ECSPI_CONREG_SMC (1 << 3)
  37 #define ECSPI_CONREG_CHANNEL_MODE_SHIFT 4
  38 #define ECSPI_CONREG_CHANNEL_MODE_LENGTH 4
  39 #define ECSPI_CONREG_DRCTL_SHIFT 16
  40 #define ECSPI_CONREG_DRCTL_LENGTH 2
  41 #define ECSPI_CONREG_CHANNEL_SELECT_SHIFT 18
  42 #define ECSPI_CONREG_CHANNEL_SELECT_LENGTH 2
  43 #define ECSPI_CONREG_BURST_LENGTH_SHIFT 20
  44 #define ECSPI_CONREG_BURST_LENGTH_LENGTH 12
  45
  46 /* ECSPI_CONFIGREG */
  47 #define ECSPI_CONFIGREG_SS_CTL_SHIFT 8
  48 #define ECSPI_CONFIGREG_SS_CTL_LENGTH 4
  49
  50 /* ECSPI_INTREG */
  51 #define ECSPI_INTREG_TEEN (1 << 0)
  52 #define ECSPI_INTREG_TDREN (1 << 1)
  53 #define ECSPI_INTREG_TFEN (1 << 2)
  54 #define ECSPI_INTREG_RREN (1 << 3)
  55 #define ECSPI_INTREG_RDREN (1 << 4)
  56 #define ECSPI_INTREG_RFEN (1 << 5)
  57 #define ECSPI_INTREG_ROEN (1 << 6)
  58 #define ECSPI_INTREG_TCEN (1 << 7)
  59
  60 /* ECSPI_DMAREG */
  61 #define ECSPI_DMAREG_RXTDEN (1 << 31)
  62 #define ECSPI_DMAREG_RXDEN (1 << 23)
  63 #define ECSPI_DMAREG_TEDEN (1 << 7)
  64 #define ECSPI_DMAREG_RX_THRESHOLD_SHIFT 16
  65 #define ECSPI_DMAREG_RX_THRESHOLD_LENGTH 6
  66
  67 /* ECSPI_STATREG */
  68 #define ECSPI_STATREG_TE (1 << 0)
  69 #define ECSPI_STATREG_TDR (1 << 1)
  70 #define ECSPI_STATREG_TF (1 << 2)
  71 #define ECSPI_STATREG_RR (1 << 3)
  72 #define ECSPI_STATREG_RDR (1 << 4)
  73 #define ECSPI_STATREG_RF (1 << 5)
  74 #define ECSPI_STATREG_RO (1 << 6)
  75 #define ECSPI_STATREG_TC (1 << 7)
  76
  77 #define EXTRACT(value, name) extract32(value, name##_SHIFT, name##_LENGTH)
  78
  79 #define TYPE_IMX_SPI "imx.spi"
  80 #define IMX_SPI(obj) OBJECT_CHECK(IMXSPIState, (obj), TYPE_IMX_SPI)
  81
  82 typedef struct IMXSPIState {
  83     /* <private> */
  84     SysBusDevice parent_obj;
  85
  86     /* <public> */
  87     MemoryRegion iomem;
  88
  89     qemu_irq irq;
  90
  91     qemu_irq cs_lines[4];
  92
  93     SSIBus *bus;
  94
  95     uint32_t regs[ECSPI_MAX];
  96
  97     Fifo32 rx_fifo;
  98     Fifo32 tx_fifo;
  99
 100     int16_t burst_length;
 101 } IMXSPIState;
 102
 103 #endif /* IMX_SPI_H */