release/src-rt-6.x/cfe/cfe/dev/ns16550.h

   1 /*  *********************************************************************
   2     *  Broadcom Common Firmware Environment (CFE)
   3     *
   4     *  NS16550 Serial Port definitions          File: ns16550.h
   5     *
   6     *  This defines the hardware registers of 16550 compatible UARTs
   7     *
   8     *********************************************************************
   9     *
  10     *  Copyright 2000,2001,2002,2003
  11     *  Broadcom Corporation. All rights reserved.
  12     *
  13     *  This software is furnished under license and may be used and
  14     *  copied only in accordance with the following terms and
  15     *  conditions.  Subject to these conditions, you may download,
  16     *  copy, install, use, modify and distribute modified or unmodified
  17     *  copies of this software in source and/or binary form.  No title
  18     *  or ownership is transferred hereby.
  19     *
  20     *  1) Any source code used, modified or distributed must reproduce
  21     *     and retain this copyright notice and list of conditions
  22     *     as they appear in the source file.
  23     *
  24     *  2) No right is granted to use any trade name, trademark, or
  25     *     logo of Broadcom Corporation.  The "Broadcom Corporation"
  26     *     name may not be used to endorse or promote products derived
  27     *     from this software without the prior written permission of
  28     *     Broadcom Corporation.
  29     *
  30     *  3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR
  31     *     IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
  32     *     WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  33     *     PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT
  34     *     SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN
  35     *     PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT,
  36     *     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  37     *     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  38     *     GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  39     *     BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  40     *     OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  41     *     TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF
  42     *     THE POSSIBILITY OF SUCH DAMAGE.
  43     ********************************************************************* */
  44
  45 /*
  46  * NS16550 UART registers
  47  */
  48
  49 #ifndef _NS16550_H_
  50 #define _NS16550_H_
  51
  52 #ifndef NS16550_HZ
  53 #define NS16550_HZ      1843200
  54 #endif
  55
  56 /*
  57  * NS16550 UART registers
  58  */
  59
  60 /* Register definitions */
  61
  62 #ifndef CPU_R32364
  63 #define R_UART_DATA     0
  64 #define R_UART_IER      1
  65 #define R_UART_IIR      2
  66 #define R_UART_FIFO     R_UART_IIR
  67 #define R_UART_CFCR     3
  68 #define R_UART_MCR      4
  69 #define R_UART_LSR      5
  70 #define R_UART_MSR      6
  71 #define R_UART_SCR      7
  72 #else
  73 #define R_UART_DATA     (0 << 2)
  74 #define R_UART_IER      (1 << 2)
  75 #define R_UART_IIR      (2 << 2)
  76 #define R_UART_FIFO     R_UART_IIR
  77 #define R_UART_CFCR     (3 << 2)
  78 #define R_UART_MCR      (4 << 2)
  79 #define R_UART_LSR      (5 << 2)
  80 #define R_UART_MSR      (6 << 2)
  81 #define R_UART_SCR      (7 << 2)
  82 #endif
  83
  84 /* 16 bit baud rate divisor (lower byte in UART_DATA, upper in UART_IER) */
  85 #define BRTC(base, baud)        ((base + (8 * baud)) / (16*(baud)))
  86
  87 /* interrupt enable register */
  88 #define IER_ERXRDY      0x1     /* int on rx ready */
  89 #define IER_ETXRDY      0x2     /* int on tx ready */
  90 #define IER_ERLS        0x4     /* int on line status change */
  91 #define IER_EMSC        0x8     /* int on modem status change */
  92
  93 /* interrupt identification register */
  94 #define IIR_IMASK       0xf     /* mask */
  95 #define IIR_RXTOUT      0xc     /* receive timeout */
  96 #define IIR_RLS         0x6     /* receive line status */
  97 #define IIR_RXRDY       0x4     /* receive ready */
  98 #define IIR_TXRDY       0x2     /* transmit ready */
  99 #define IIR_NOPEND      0x1     /* nothing */
 100 #define IIR_MLSC        0x0     /* modem status */
 101 #define IIR_FIFO_MASK   0xc0    /* set if FIFOs are enabled */
 102
 103 /* fifo control register */
 104 #define FIFO_ENABLE     0x01    /* enable fifo */
 105 #define FIFO_RCV_RST    0x02    /* reset receive fifo */
 106 #define FIFO_XMT_RST    0x04    /* reset transmit fifo */
 107 #define FIFO_DMA_MODE   0x08    /* enable dma mode */
 108 #define FIFO_TRIGGER_1  0x00    /* trigger at 1 char */
 109 #define FIFO_TRIGGER_4  0x40    /* trigger at 4 chars */
 110 #define FIFO_TRIGGER_8  0x80    /* trigger at 8 chars */
 111 #define FIFO_TRIGGER_14 0xc0    /* trigger at 14 chars */
 112
 113 /* character format control register */
 114 #define CFCR_DLAB       0x80    /* divisor latch */
 115 #define CFCR_SBREAK     0x40    /* send break */
 116 #define CFCR_PZERO      0x30    /* zero parity */
 117 #define CFCR_PONE       0x20    /* one parity */
 118 #define CFCR_PEVEN      0x10    /* even parity */
 119 #define CFCR_PODD       0x00    /* odd parity */
 120 #define CFCR_PENAB      0x08    /* parity enable */
 121 #define CFCR_STOPB      0x04    /* 2 stop bits */
 122 #define CFCR_8BITS      0x03    /* 8 data bits */
 123 #define CFCR_7BITS      0x02    /* 7 data bits */
 124 #define CFCR_6BITS      0x01    /* 6 data bits */
 125 #define CFCR_5BITS      0x00    /* 5 data bits */
 126
 127 /* modem control register */
 128 #define MCR_LOOPBACK    0x10    /* loopback */
 129 #define MCR_IENABLE     0x08    /* output 2 = int enable */
 130 #define MCR_DRS         0x04
 131 #define MCR_RTS         0x02    /* enable RTS */
 132 #define MCR_DTR         0x01    /* enable DTR */
 133
 134 /* line status register */
 135 #define LSR_RCV_FIFO    0x80    /* error in receive fifo */
 136 #define LSR_TSRE        0x40    /* transmitter empty */
 137 #define LSR_TXRDY       0x20    /* transmitter ready */
 138 #define LSR_BI          0x10    /* break detected */
 139 #define LSR_FE          0x08    /* framing error */
 140 #define LSR_PE          0x04    /* parity error */
 141 #define LSR_OE          0x02    /* overrun error */
 142 #define LSR_RXRDY       0x01    /* receiver ready */
 143 #define LSR_RCV_MASK    0x1f
 144
 145 /* modem status register */
 146 #define MSR_DCD         0x80    /* DCD active */
 147 #define MSR_RI          0x40    /* RI  active */
 148 #define MSR_DSR         0x20    /* DSR active */
 149 #define MSR_CTS         0x10    /* CTS active */
 150 #define MSR_DDCD        0x08    /* DCD changed */
 151 #define MSR_TERI        0x04    /* RI  changed */
 152 #define MSR_DDSR        0x02    /* DSR changed */
 153 #define MSR_DCTS        0x01    /* CTS changed */
 154
 155 #endif /* _NS16550_H_ */