1 /*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * from: @(#)ns16550.h 7.1 (Berkeley) 5/9/91 30 * $FreeBSD$ 31 */ 32 33 /* 34 * NS8250... UART registers. 35 */ 36 37 /* 8250 registers #[0-6]. */ 38 39 #define com_data 0 /* data register (R/W) */ 40 #define REG_DATA com_data 41 42 #define com_ier 1 /* interrupt enable register (W) */ 43 #define REG_IER com_ier 44 #define IER_ERXRDY 0x1 45 #define IER_ETXRDY 0x2 46 #define IER_ERLS 0x4 47 #define IER_EMSC 0x8 48 49 #define IER_BITS "\20\1ERXRDY\2ETXRDY\3ERLS\4EMSC" 50 51 #define com_iir 2 /* interrupt identification register (R) */ 52 #define REG_IIR com_iir 53 #define IIR_IMASK 0xf 54 #define IIR_RXTOUT 0xc 55 #define IIR_BUSY 0x7 56 #define IIR_RLS 0x6 57 #define IIR_RXRDY 0x4 58 #define IIR_TXRDY 0x2 59 #define IIR_NOPEND 0x1 60 #define IIR_MLSC 0x0 61 #define IIR_FIFO_MASK 0xc0 /* set if FIFOs are enabled */ 62 63 #define IIR_BITS "\20\1NOPEND\2TXRDY\3RXRDY" 64 65 #define com_lcr 3 /* line control register (R/W) */ 66 #define com_cfcr com_lcr /* character format control register (R/W) */ 67 #define REG_LCR com_lcr 68 #define LCR_DLAB 0x80 69 #define CFCR_DLAB LCR_DLAB 70 #define LCR_EFR_ENABLE 0xbf /* magic to enable EFR on 16650 up */ 71 #define CFCR_EFR_ENABLE LCR_EFR_ENABLE 72 #define LCR_SBREAK 0x40 73 #define CFCR_SBREAK LCR_SBREAK 74 #define LCR_PZERO 0x30 75 #define CFCR_PZERO LCR_PZERO 76 #define LCR_PONE 0x20 77 #define CFCR_PONE LCR_PONE 78 #define LCR_PEVEN 0x10 79 #define CFCR_PEVEN LCR_PEVEN 80 #define LCR_PODD 0x00 81 #define CFCR_PODD LCR_PODD 82 #define LCR_PENAB 0x08 83 #define CFCR_PENAB LCR_PENAB 84 #define LCR_STOPB 0x04 85 #define CFCR_STOPB LCR_STOPB 86 #define LCR_8BITS 0x03 87 #define CFCR_8BITS LCR_8BITS 88 #define LCR_7BITS 0x02 89 #define CFCR_7BITS LCR_7BITS 90 #define LCR_6BITS 0x01 91 #define CFCR_6BITS LCR_6BITS 92 #define LCR_5BITS 0x00 93 #define CFCR_5BITS LCR_5BITS 94 95 #define com_mcr 4 /* modem control register (R/W) */ 96 #define REG_MCR com_mcr 97 #define MCR_PRESCALE 0x80 /* only available on 16650 up */ 98 #define MCR_LOOPBACK 0x10 99 #define MCR_IE 0x08 100 #define MCR_IENABLE MCR_IE 101 #define MCR_DRS 0x04 102 #define MCR_RTS 0x02 103 #define MCR_DTR 0x01 104 105 #define MCR_BITS "\20\1DTR\2RTS\3DRS\4IE\5LOOPBACK\10PRESCALE" 106 107 #define com_lsr 5 /* line status register (R/W) */ 108 #define REG_LSR com_lsr 109 #define LSR_RCV_FIFO 0x80 110 #define LSR_TEMT 0x40 111 #define LSR_TSRE LSR_TEMT 112 #define LSR_THRE 0x20 113 #define LSR_TXRDY LSR_THRE 114 #define LSR_BI 0x10 115 #define LSR_FE 0x08 116 #define LSR_PE 0x04 117 #define LSR_OE 0x02 118 #define LSR_RXRDY 0x01 119 #define LSR_RCV_MASK 0x1f 120 121 #define LSR_BITS "\20\1RXRDY\2OE\3PE\4FE\5BI\6THRE\7TEMT\10RCV_FIFO" 122 123 #define com_msr 6 /* modem status register (R/W) */ 124 #define REG_MSR com_msr 125 #define MSR_DCD 0x80 126 #define MSR_RI 0x40 127 #define MSR_DSR 0x20 128 #define MSR_CTS 0x10 129 #define MSR_DDCD 0x08 130 #define MSR_TERI 0x04 131 #define MSR_DDSR 0x02 132 #define MSR_DCTS 0x01 133 134 #define MSR_BITS "\20\1DCTS\2DDSR\3TERI\4DDCD\5CTS\6DSR\7RI\10DCD" 135 136 /* 8250 multiplexed registers #[0-1]. Access enabled by LCR[7]. */ 137 #define com_dll 0 /* divisor latch low (R/W) */ 138 #define com_dlbl com_dll 139 #define com_dlm 1 /* divisor latch high (R/W) */ 140 #define com_dlbh com_dlm 141 #define REG_DLL com_dll 142 #define REG_DLH com_dlm 143 144 /* 16450 register #7. Not multiplexed. */ 145 #define com_scr 7 /* scratch register (R/W) */ 146 147 /* 16550 register #2. Not multiplexed. */ 148 #define com_fcr 2 /* FIFO control register (W) */ 149 #define com_fifo com_fcr 150 #define REG_FCR com_fcr 151 #define FCR_ENABLE 0x01 152 #define FIFO_ENABLE FCR_ENABLE 153 #define FCR_RCV_RST 0x02 154 #define FIFO_RCV_RST FCR_RCV_RST 155 #define FCR_XMT_RST 0x04 156 #define FIFO_XMT_RST FCR_XMT_RST 157 #define FCR_DMA 0x08 158 #define FIFO_DMA_MODE FCR_DMA 159 #define FCR_RX_LOW 0x00 160 #define FIFO_RX_LOW FCR_RX_LOW 161 #define FCR_RX_MEDL 0x40 162 #define FIFO_RX_MEDL FCR_RX_MEDL 163 #define FCR_RX_MEDH 0x80 164 #define FIFO_RX_MEDH FCR_RX_MEDH 165 #define FCR_RX_HIGH 0xc0 166 #define FIFO_RX_HIGH FCR_RX_HIGH 167 168 #define FCR_BITS "\20\1ENABLE\2RCV_RST\3XMT_RST\4DMA" 169 170 /* 16650 registers #2,[4-7]. Access enabled by LCR_EFR_ENABLE. */ 171 172 #define com_efr 2 /* enhanced features register (R/W) */ 173 #define REG_EFR com_efr 174 #define EFR_CTS 0x80 175 #define EFR_AUTOCTS EFR_CTS 176 #define EFR_RTS 0x40 177 #define EFR_AUTORTS EFR_RTS 178 #define EFR_EFE 0x10 /* enhanced functions enable */ 179 180 #define com_xon1 4 /* XON 1 character (R/W) */ 181 #define com_xon2 5 /* XON 2 character (R/W) */ 182 #define com_xoff1 6 /* XOFF 1 character (R/W) */ 183 #define com_xoff2 7 /* XOFF 2 character (R/W) */ 184 185 #define DW_REG_USR 31 /* DesignWare derived Uart Status Reg */ 186 #define com_usr 39 /* Octeon 16750/16550 Uart Status Reg */ 187 #define REG_USR com_usr 188 #define USR_BUSY 1 /* Uart Busy. Serial transfer in progress */ 189 #define USR_TXFIFO_NOTFULL 2 /* Uart TX FIFO Not full */ 190 191 /* 16950 register #1. Access enabled by ACR[7]. Also requires !LCR[7]. */ 192 #define com_asr 1 /* additional status register (R[0-7]/W[0-1]) */ 193 194 /* 16950 register #3. R/W access enabled by ACR[7]. */ 195 #define com_rfl 3 /* receiver fifo level (R) */ 196 197 /* 198 * 16950 register #4. Access enabled by ACR[7]. Also requires 199 * !LCR_EFR_ENABLE. 200 */ 201 #define com_tfl 4 /* transmitter fifo level (R) */ 202 203 /* 204 * 16950 register #5. Accessible if !LCR_EFR_ENABLE. Read access also 205 * requires ACR[6]. 206 */ 207 #define com_icr 5 /* index control register (R/W) */ 208 209 /* 210 * 16950 register #7. It is the same as com_scr except it has a different 211 * abbreviation in the manufacturer's data sheet and it also serves as an 212 * index into the Indexed Control register set. 213 */ 214 #define com_spr com_scr /* scratch pad (and index) register (R/W) */ 215 #define REG_SPR com_scr 216 217 /* 218 * 16950 indexed control registers #[0-0x13]. Access is via index in SPR, 219 * data in ICR (if ICR is accessible). 220 */ 221 222 #define com_acr 0 /* additional control register (R/W) */ 223 #define ACR_ASE 0x80 /* ASR/RFL/TFL enable */ 224 #define ACR_ICRE 0x40 /* ICR enable */ 225 #define ACR_TLE 0x20 /* TTL/RTL enable */ 226 227 #define com_cpr 1 /* clock prescaler register (R/W) */ 228 #define com_tcr 2 /* times clock register (R/W) */ 229 #define com_ttl 4 /* transmitter trigger level (R/W) */ 230 #define com_rtl 5 /* receiver trigger level (R/W) */ 231 /* ... */ 232 233 /* Hardware extension mode register for RSB-2000/3000. */ 234 #define com_emr com_msr 235 #define EMR_EXBUFF 0x04 236 #define EMR_CTSFLW 0x08 237 #define EMR_DSRFLW 0x10 238 #define EMR_RTSFLW 0x20 239 #define EMR_DTRFLW 0x40 240 #define EMR_EFMODE 0x80 241