include/nios2-io.h

   1 /*
   2  * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
   3  * Scott McNutt <smcnutt@psyent.com>
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /*************************************************************************
  25  * Altera Nios2 Standard Peripherals
  26  ************************************************************************/
  27
  28 #ifndef __NIOS2IO_H__
  29 #define __NIOS2IO_H__
  30
  31 /*------------------------------------------------------------------------
  32  * UART (http://www.altera.com/literature/ds/ds_nios_uart.pdf)
  33  *----------------------------------------------------------------------*/
  34 typedef volatile struct nios_uart_t {
  35         unsigned        rxdata;         /* Rx data reg */
  36         unsigned        txdata;         /* Tx data reg */
  37         unsigned        status;         /* Status reg */
  38         unsigned        control;        /* Control reg */
  39         unsigned        divisor;        /* Baud rate divisor reg */
  40         unsigned        endofpacket;    /* End-of-packet reg */
  41 }nios_uart_t;
  42
  43 /* status register */
  44 #define NIOS_UART_PE            (1 << 0)        /* parity error */
  45 #define NIOS_UART_FE            (1 << 1)        /* frame error */
  46 #define NIOS_UART_BRK           (1 << 2)        /* break detect */
  47 #define NIOS_UART_ROE           (1 << 3)        /* rx overrun */
  48 #define NIOS_UART_TOE           (1 << 4)        /* tx overrun */
  49 #define NIOS_UART_TMT           (1 << 5)        /* tx empty */
  50 #define NIOS_UART_TRDY          (1 << 6)        /* tx ready */
  51 #define NIOS_UART_RRDY          (1 << 7)        /* rx ready */
  52 #define NIOS_UART_E             (1 << 8)        /* exception */
  53 #define NIOS_UART_DCTS          (1 << 10)       /* cts change */
  54 #define NIOS_UART_CTS           (1 << 11)       /* cts */
  55 #define NIOS_UART_EOP           (1 << 12)       /* eop detected */
  56
  57 /* control register */
  58 #define NIOS_UART_IPE           (1 << 0)        /* parity error int ena*/
  59 #define NIOS_UART_IFE           (1 << 1)        /* frame error int ena */
  60 #define NIOS_UART_IBRK          (1 << 2)        /* break detect int ena */
  61 #define NIOS_UART_IROE          (1 << 3)        /* rx overrun int ena */
  62 #define NIOS_UART_ITOE          (1 << 4)        /* tx overrun int ena */
  63 #define NIOS_UART_ITMT          (1 << 5)        /* tx empty int ena */
  64 #define NIOS_UART_ITRDY         (1 << 6)        /* tx ready int ena */
  65 #define NIOS_UART_IRRDY         (1 << 7)        /* rx ready int ena */
  66 #define NIOS_UART_IE            (1 << 8)        /* exception int ena */
  67 #define NIOS_UART_TBRK          (1 << 9)        /* transmit break */
  68 #define NIOS_UART_IDCTS         (1 << 10)       /* cts change int ena */
  69 #define NIOS_UART_RTS           (1 << 11)       /* rts */
  70 #define NIOS_UART_IEOP          (1 << 12)       /* eop detected int ena */
  71
  72
  73 /*------------------------------------------------------------------------
  74  * TIMER (http://www.altera.com/literature/ds/ds_nios_timer.pdf)
  75  *----------------------------------------------------------------------*/
  76 typedef volatile struct nios_timer_t {
  77         unsigned        status;                 /* Timer status reg */
  78         unsigned        control;                /* Timer control reg */
  79         unsigned        periodl;                /* Timeout period low */
  80         unsigned        periodh;                /* Timeout period high */
  81         unsigned        snapl;                  /* Snapshot low */
  82         unsigned        snaph;                  /* Snapshot high */
  83 }nios_timer_t;
  84
  85 /* status register */
  86 #define NIOS_TIMER_TO           (1 << 0)        /* Timeout */
  87 #define NIOS_TIMER_RUN          (1 << 1)        /* Timer running */
  88
  89 /* control register */
  90 #define NIOS_TIMER_ITO          (1 << 0)        /* Timeout int ena */
  91 #define NIOS_TIMER_CONT         (1 << 1)        /* Continuous mode */
  92 #define NIOS_TIMER_START        (1 << 2)        /* Start timer */
  93 #define NIOS_TIMER_STOP         (1 << 3)        /* Stop timer */
  94
  95
  96 /*------------------------------------------------------------------------
  97  * PIO (http://www.altera.com/literature/ds/ds_nios_pio.pdf)
  98  *----------------------------------------------------------------------*/
  99 typedef volatile struct nios_pio_t {
 100         unsigned int    data;           /* Data value at each PIO in/out */
 101         unsigned int    direction;      /* Data direct. for each PIO bit */
 102         unsigned int    interruptmask;  /* Per-bit IRQ enable/disable */
 103         unsigned int    edgecapture;    /* Per-bit sync. edge detect & hold */
 104 }nios_pio_t;
 105
 106 /* direction register */
 107 #define NIOS_PIO_OUT            (1)             /* PIO bit is output */
 108 #define NIOS_PIO_IN             (0)             /* PIO bit is input */
 109
 110
 111 /*------------------------------------------------------------------------
 112  * SPI (http://www.altera.com/literature/ds/ds_nios_spi.pdf)
 113  *----------------------------------------------------------------------*/
 114 typedef volatile struct nios_spi_t {
 115         unsigned        rxdata;         /* Rx data reg */
 116         unsigned        txdata;         /* Tx data reg */
 117         unsigned        status;         /* Status reg */
 118         unsigned        control;        /* Control reg */
 119         unsigned        reserved;       /* (master only) */
 120         unsigned        slaveselect;    /* SPI slave select mask (master only) */
 121 }nios_spi_t;
 122
 123 /* status register */
 124 #define NIOS_SPI_ROE            (1 << 3)        /* rx overrun */
 125 #define NIOS_SPI_TOE            (1 << 4)        /* tx overrun */
 126 #define NIOS_SPI_TMT            (1 << 5)        /* tx empty */
 127 #define NIOS_SPI_TRDY           (1 << 6)        /* tx ready */
 128 #define NIOS_SPI_RRDY           (1 << 7)        /* rx ready */
 129 #define NIOS_SPI_E              (1 << 8)        /* exception */
 130
 131 /* control register */
 132 #define NIOS_SPI_IROE           (1 << 3)        /* rx overrun int ena */
 133 #define NIOS_SPI_ITOE           (1 << 4)        /* tx overrun int ena */
 134 #define NIOS_SPI_ITRDY          (1 << 6)        /* tx ready int ena */
 135 #define NIOS_SPI_IRRDY          (1 << 7)        /* rx ready int ena */
 136 #define NIOS_SPI_IE             (1 << 8)        /* exception int ena */
 137 #define NIOS_SPI_SSO            (1 << 10)       /* override SS_n output */
 138
 139 /*------------------------------------------------------------------------
 140  * JTAG UART
 141  *----------------------------------------------------------------------*/
 142 typedef volatile struct nios_jtag_t {
 143         unsigned        data;                   /* Data register */
 144         unsigned        control;                /* Control register */
 145 }nios_jtag_t;
 146
 147 /* data register */
 148 #define NIOS_JTAG_RVALID        (1<<15)         /* Read valid */
 149 #define NIOS_JTAG_DATA(d)       ((d)&0x0ff)     /* Read data */
 150 #define NIOS_JTAG_RAVAIL(d)     ((d)>>16)       /* Read space avail */
 151
 152 /* control register */
 153 #define NIOS_JTAG_RE            (1 << 0)        /* read intr enable */
 154 #define NIOS_JTAG_WE            (1 << 1)        /* write intr enable */
 155 #define NIOS_JTAG_RI            (1 << 8)        /* read intr pending */
 156 #define NIOS_JTAG_WI            (1 << 9)        /* write intr pending*/
 157 #define NIOS_JTAG_AC            (1 << 10)       /* activity indicator */
 158 #define NIOS_JTAG_RRDY          (1 << 12)       /* read available */
 159 #define NIOS_JTAG_WSPACE(d)     ((d)>>16)       /* Write space avail */
 160
 161 /*------------------------------------------------------------------------
 162  * SYSTEM ID
 163  *----------------------------------------------------------------------*/
 164 typedef volatile struct nios_sysid_t {
 165         unsigned        id;                     /* The system build id*/
 166         unsigned        timestamp;              /* Timestamp */
 167 }nios_sysid_t;
 168
 169 #endif /* __NIOS2IO_H__ */