include/nios-io.h

   1 /*
   2  * (C) Copyright 2003, 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 Nios Standard Peripherals
  26  ************************************************************************/
  27
  28 #ifndef __NIOSIO_H__
  29 #define __NIOSIO_H__
  30
  31 /*------------------------------------------------------------------------
  32  * UART
  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
  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 #endif /* __NIOSIO_H__ */
  96