1 /* $NetBSD: comreg.h,v 1.22 2013/10/03 13:23:03 kiyohara Exp $ */ 2 3 /*- 4 * Copyright (c) 1991 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)comreg.h 7.2 (Berkeley) 5/9/91 32 */ 33 34 #include <dev/ic/ns16550reg.h> 35 36 #ifdef _KERNEL_OPT 37 #include "opt_com.h" 38 #endif 39 40 #define COM_FREQ 1843200 /* 16-bit baud rate divisor */ 41 #ifndef COM_TOLERANCE 42 #define COM_TOLERANCE 30 /* baud rate tolerance, in 0.1% units */ 43 #endif 44 45 /* interrupt enable register */ 46 #define IER_ERXRDY 0x1 /* Enable receiver interrupt */ 47 #define IER_ETXRDY 0x2 /* Enable transmitter empty interrupt */ 48 #define IER_ERLS 0x4 /* Enable line status interrupt */ 49 #define IER_EMSC 0x8 /* Enable modem status interrupt */ 50 #define IER_ERTS 0x40 /* Enable RTS interrupt */ 51 #define IER_ECTS 0x80 /* Enable CTS interrupt */ 52 /* PXA2X0's ns16550 ports have extra bits in this register */ 53 #define IER_ERXTOUT 0x10 /* Enable rx timeout interrupt */ 54 #define IER_EUART 0x40 /* Enable UART */ 55 56 /* interrupt identification register */ 57 #define IIR_IMASK 0xf 58 #define IIR_RXTOUT 0xc 59 #define IIR_RLS 0x6 /* Line status change */ 60 #define IIR_RXRDY 0x4 /* Receiver ready */ 61 #define IIR_TXRDY 0x2 /* Transmitter ready */ 62 #define IIR_MLSC 0x0 /* Modem status */ 63 #define IIR_NOPEND 0x1 /* No pending interrupts */ 64 #define IIR_64B_FIFO 0x20 /* 64byte FIFO Enabled (16750) */ 65 #define IIR_FIFO_MASK 0xc0 /* set if FIFOs are enabled */ 66 #ifdef COM_16750 67 #define IIR_BUSY 0x7 /* Busy indicator */ 68 #endif 69 70 /* fifo control register */ 71 #define FIFO_ENABLE 0x01 /* Turn the FIFO on */ 72 #define FIFO_RCV_RST 0x02 /* Reset RX FIFO */ 73 #define FIFO_XMT_RST 0x04 /* Reset TX FIFO */ 74 #define FIFO_DMA_MODE 0x08 75 #define FIFO_64B_ENABLE 0x20 /* 64byte FIFO Enable (16750) */ 76 #define FIFO_TRIGGER_1 0x00 /* Trigger RXRDY intr on 1 character */ 77 #define FIFO_TRIGGER_4 0x40 /* ibid 4 */ 78 #define FIFO_TRIGGER_8 0x80 /* ibid 8 */ 79 #define FIFO_TRIGGER_14 0xc0 /* ibid 14 */ 80 81 /* enhanced feature register */ 82 #define EFR_AUTOCTS 0x80 /* Automatic CTS flow control */ 83 #define EFR_AUTORTS 0x40 /* Automatic RTS flow control */ 84 #define EFR_SPECIAL 0x20 /* Special char detect */ 85 #define EFR_EFCR 0x10 /* Enhanced function control bit */ 86 #define EFR_TXFLOWBOTH 0x0c /* Automatic transmit XON/XOFF 1 and 2 */ 87 #define EFR_TXFLOW1 0x08 /* Automatic transmit XON/XOFF 1 */ 88 #define EFR_TXFLOW2 0x04 /* Automatic transmit XON/XOFF 2 */ 89 #define EFR_TXFLOWNONE 0x00 /* No automatic XON/XOFF transmit */ 90 #define EFR_RXFLOWBOTH 0x03 /* Automatic receive XON/XOFF 1 and 2 */ 91 #define EFR_RXFLOW1 0x02 /* Automatic receive XON/XOFF 1 */ 92 #define EFR_RXFLOW2 0x01 /* Automatic receive XON/XOFF 2 */ 93 #define EFR_RXFLOWNONE 0x00 /* No automatic XON/XOFF receive */ 94 95 /* line control register */ 96 #define LCR_EERS 0xBF /* Enable access to Enhanced Register Set */ 97 #define LCR_DLAB 0x80 /* Divisor latch access enable */ 98 #define LCR_SBREAK 0x40 /* Break Control */ 99 #define LCR_PZERO 0x38 /* Space parity */ 100 #define LCR_PONE 0x28 /* Mark parity */ 101 #define LCR_PEVEN 0x18 /* Even parity */ 102 #define LCR_PODD 0x08 /* Odd parity */ 103 #define LCR_PNONE 0x00 /* No parity */ 104 #define LCR_PENAB 0x08 /* XXX - low order bit of all parity */ 105 #define LCR_STOPB 0x04 /* 2 stop bits per serial word */ 106 #define LCR_8BITS 0x03 /* 8 bits per serial word */ 107 #define LCR_7BITS 0x02 /* 7 bits */ 108 #define LCR_6BITS 0x01 /* 6 bits */ 109 #define LCR_5BITS 0x00 /* 5 bits */ 110 111 /* modem control register */ 112 #define MCR_PRESCALE 0x80 /* 16650/16950: Baud rate prescaler select */ 113 #define MCR_TCR_TLR 0x40 /* OMAP: enables access to the TCR & TLR regs */ 114 #define MCR_XONENABLE 0x20 /* OMAP XON_EN */ 115 #define MCR_AFE 0x20 /* tl16c750: Flow Control Enable */ 116 #define MCR_LOOPBACK 0x10 /* Loop test: echos from TX to RX */ 117 #define MCR_IENABLE 0x08 /* Out2: enables UART interrupts */ 118 #define MCR_DRS 0x04 /* Out1: resets some internal modems */ 119 #define MCR_RTS 0x02 /* Request To Send */ 120 #define MCR_DTR 0x01 /* Data Terminal Ready */ 121 122 /* line status register */ 123 #define LSR_RCV_FIFO 0x80 124 #define LSR_TSRE 0x40 /* Transmitter empty: byte sent */ 125 #define LSR_TXRDY 0x20 /* Transmitter buffer empty */ 126 #define LSR_BI 0x10 /* Break detected */ 127 #define LSR_FE 0x08 /* Framing error: bad stop bit */ 128 #define LSR_PE 0x04 /* Parity error */ 129 #define LSR_OE 0x02 /* Overrun, lost incoming byte */ 130 #define LSR_RXRDY 0x01 /* Byte ready in Receive Buffer */ 131 #define LSR_RCV_MASK 0x1f /* Mask for incoming data or error */ 132 133 /* modem status register */ 134 /* All deltas are from the last read of the MSR. */ 135 #define MSR_DCD 0x80 /* Current Data Carrier Detect */ 136 #define MSR_RI 0x40 /* Current Ring Indicator */ 137 #define MSR_DSR 0x20 /* Current Data Set Ready */ 138 #define MSR_CTS 0x10 /* Current Clear to Send */ 139 #define MSR_DDCD 0x08 /* DCD has changed state */ 140 #define MSR_TERI 0x04 /* RI has toggled low to high */ 141 #define MSR_DDSR 0x02 /* DSR has changed state */ 142 #define MSR_DCTS 0x01 /* CTS has changed state */ 143 144 /* OMAP mode definition register 1 */ 145 #define MDR1_FRAME_END_MODE 0x80 146 #define MDR1_SIP_MODE 0x40 147 #define MDR1_SCT 0x20 148 #define MDR1_SET_TXIR 0x10 149 #define MDR1_IR_SLEEP 0x08 150 #define MDR1_MODE_DISABLE 0x07 151 #define MDR1_MODE_FIR 0x05 152 #define MDR1_MODE_MIR 0x04 153 #define MDR1_MODE_UART_13X 0x03 154 #define MDR1_MODE_UART_16X_AUTOBAUD 0x02 155 #define MDR1_MODE_SIR 0x01 156 #define MDR1_MODE_UART_16X 0x00 157 #define MDR1_MODE_MASK 0x07 158 159 160 /* XXX ISA-specific. */ 161 #define COM_NPORTS 8 162