1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * cyclades cyclom-y serial driver 5 * Andrew Herbert <andrew@werple.apana.org.au>, 17 August 1993 6 * 7 * Copyright (c) 1993 Andrew Herbert. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name Andrew Herbert may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED 22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 24 * NO EVENT SHALL I BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Definitions for Cirrus Logic CD1400 serial/parallel chips. 35 */ 36 37 #define CD1400_NO_OF_CHANNELS 4 /* 4 serial channels per chip */ 38 #define CD1400_RX_FIFO_SIZE 12 39 #define CD1400_TX_FIFO_SIZE 12 40 41 /* 42 * Global registers. 43 */ 44 #define CD1400_GFRCR 0x40 /* global firmware revision code */ 45 #define CD1400_CAR 0x68 /* channel access */ 46 #define CD1400_CAR_CHAN (3<<0) /* channel select */ 47 #define CD1400_GCR 0x4B /* global configuration */ 48 #define CD1400_GCR_PARALLEL (1<<7) /* channel 0 is parallel */ 49 #define CD1400_SVRR 0x67 /* service request */ 50 #define CD1400_SVRR_MDMCH (1<<2) 51 #define CD1400_SVRR_TXRDY (1<<1) 52 #define CD1400_SVRR_RXRDY (1<<0) 53 #define CD1400_RICR 0x44 /* receive interrupting channel */ 54 #define CD1400_TICR 0x45 /* transmit interrupting channel */ 55 #define CD1400_MICR 0x46 /* modem interrupting channel */ 56 #define CD1400_RIR 0x6B /* receive interrupt status */ 57 #define CD1400_RIR_RDIREQ (1<<7) /* rx service required */ 58 #define CD1400_RIR_RBUSY (1<<6) /* rx service in progress */ 59 #define CD1400_RIR_CHAN (3<<0) /* channel select */ 60 #define CD1400_TIR 0x6A /* transmit interrupt status */ 61 #define CD1400_TIR_RDIREQ (1<<7) /* tx service required */ 62 #define CD1400_TIR_RBUSY (1<<6) /* tx service in progress */ 63 #define CD1400_TIR_CHAN (3<<0) /* channel select */ 64 #define CD1400_MIR 0x69 /* modem interrupt status */ 65 #define CD1400_MIR_RDIREQ (1<<7) /* modem service required */ 66 #define CD1400_MIR_RBUSY (1<<6) /* modem service in progress */ 67 #define CD1400_MIR_CHAN (3<<0) /* channel select */ 68 #define CD1400_PPR 0x7E /* prescaler period */ 69 #define CD1400_PPR_PRESCALER 512 70 71 /* 72 * Virtual registers. 73 */ 74 #define CD1400_RIVR 0x43 /* receive interrupt vector */ 75 #define CD1400_RIVR_EXCEPTION (1<<2) /* receive exception bit */ 76 #define CD1400_TIVR 0x42 /* transmit interrupt vector */ 77 #define CD1400_MIVR 0x41 /* modem interrupt vector */ 78 #define CD1400_TDR 0x63 /* transmit data */ 79 #define CD1400_RDSR 0x62 /* receive data/status */ 80 #define CD1400_RDSR_TIMEOUT (1<<7) /* rx timeout */ 81 #define CD1400_RDSR_SPECIAL_SHIFT 4 /* rx special char shift */ 82 #define CD1400_RDSR_SPECIAL (7<<4) /* rx special char */ 83 #define CD1400_RDSR_BREAK (1<<3) /* rx break */ 84 #define CD1400_RDSR_PE (1<<2) /* rx parity error */ 85 #define CD1400_RDSR_FE (1<<1) /* rx framing error */ 86 #define CD1400_RDSR_OE (1<<0) /* rx overrun error */ 87 #define CD1400_MISR 0x4C /* modem interrupt status */ 88 #define CD1400_MISR_DSRd (1<<7) /* DSR delta */ 89 #define CD1400_MISR_CTSd (1<<6) /* CTS delta */ 90 #define CD1400_MISR_RId (1<<5) /* RI delta */ 91 #define CD1400_MISR_CDd (1<<4) /* CD delta */ 92 #define CD1400_EOSRR 0x60 /* end of service request */ 93 94 /* 95 * Channel registers. 96 */ 97 #define CD1400_LIVR 0x18 /* local interrupt vector */ 98 #define CD1400_CCR 0x05 /* channel control */ 99 #define CD1400_CCR_CMDRESET (1<<7) /* enables following: */ 100 #define CD1400_CCR_FTF (1<<1) /* flush tx fifo */ 101 #define CD1400_CCR_FULLRESET (1<<0) /* full reset */ 102 #define CD1400_CCR_CHANRESET 0 /* current channel */ 103 #define CD1400_CCR_CMDCORCHG (1<<6) /* enables following: */ 104 #define CD1400_CCR_COR3 (1<<3) /* COR3 changed */ 105 #define CD1400_CCR_COR2 (1<<2) /* COR2 changed */ 106 #define CD1400_CCR_COR1 (1<<1) /* COR1 changed */ 107 #define CD1400_CCR_CMDSENDSC (1<<5) /* enables following: */ 108 #define CD1400_CCR_SC (7<<0) /* special char 1-4 */ 109 #define CD1400_CCR_CMDCHANCTL (1<<4) /* enables following: */ 110 #define CD1400_CCR_XMTEN (1<<3) /* tx enable */ 111 #define CD1400_CCR_XMTDIS (1<<2) /* tx disable */ 112 #define CD1400_CCR_RCVEN (1<<1) /* rx enable */ 113 #define CD1400_CCR_RCVDIS (1<<0) /* rx disable */ 114 #define CD1400_SRER 0x06 /* service request enable */ 115 #define CD1400_SRER_MDMCH (1<<7) /* modem change */ 116 #define CD1400_SRER_RXDATA (1<<4) /* rx data */ 117 #define CD1400_SRER_TXRDY (1<<2) /* tx fifo empty */ 118 #define CD1400_SRER_TXMPTY (1<<1) /* tx shift reg empty */ 119 #define CD1400_SRER_NNDT (1<<0) /* no new data */ 120 #define CD1400_COR1 0x08 /* channel option 1 */ 121 #define CD1400_COR1_PARODD (1<<7) 122 #define CD1400_COR1_PARNORMAL (2<<5) 123 #define CD1400_COR1_PARFORCE (1<<5) /* odd/even = force 1/0 */ 124 #define CD1400_COR1_PARNONE (0<<5) 125 #define CD1400_COR1_NOINPCK (1<<4) 126 #define CD1400_COR1_STOP2 (2<<2) 127 #define CD1400_COR1_STOP15 (1<<2) /* 1.5 stop bits */ 128 #define CD1400_COR1_STOP1 (0<<2) 129 #define CD1400_COR1_CS8 (3<<0) 130 #define CD1400_COR1_CS7 (2<<0) 131 #define CD1400_COR1_CS6 (1<<0) 132 #define CD1400_COR1_CS5 (0<<0) 133 #define CD1400_COR2 0x09 /* channel option 2 */ 134 #define CD1400_COR2_IXANY (1<<7) /* implied XON mode */ 135 #define CD1400_COR2_IXOFF (1<<6) /* in-band tx flow control */ 136 #define CD1400_COR2_ETC (1<<5) /* embedded tx command */ 137 #define CD1400_ETC_CMD 0x00 /* start an ETC */ 138 #define CD1400_ETC_SENDBREAK 0x81 139 #define CD1400_ETC_INSERTDELAY 0x82 140 #define CD1400_ETC_STOPBREAK 0x83 141 #define CD1400_COR2_LLM (1<<4) /* local loopback mode */ 142 #define CD1400_COR2_RLM (1<<3) /* remote loopback mode */ 143 #define CD1400_COR2_RTSAO (1<<2) /* RTS auto output */ 144 #define CD1400_COR2_CCTS_OFLOW (1<<1) /* CTS auto enable */ 145 #define CD1400_COR2_CDSR_OFLOW (1<<0) /* DSR auto enable */ 146 #define CD1400_COR3 0x0A /* channel option 3 */ 147 #define CD1400_COR3_SCDRNG (1<<7) /* special char detect range */ 148 #define CD1400_COR3_SCD34 (1<<6) /* special char detect 3-4 */ 149 #define CD1400_COR3_FTC (1<<5) /* flow control transparency */ 150 #define CD1400_COR3_SCD12 (1<<4) /* special char detect 1-2 */ 151 #define CD1400_COR3_RXTH (15<<0) /* rx fifo threshold */ 152 #define CD1400_COR4 0x1E /* channel option 4 */ 153 #define CD1400_COR4_IGNCR (1<<7) 154 #define CD1400_COR4_ICRNL (1<<6) 155 #define CD1400_COR4_INLCR (1<<5) 156 #define CD1400_COR4_IGNBRK (1<<4) 157 #define CD1400_COR4_NOBRKINT (1<<3) 158 #define CD1400_COR4_PFO_ESC (4<<0) /* parity/framing/overrun... */ 159 #define CD1400_COR4_PFO_NUL (3<<0) 160 #define CD1400_COR4_PFO_DISCARD (2<<0) 161 #define CD1400_COR4_PFO_GOOD (1<<0) 162 #define CD1400_COR4_PFO_EXCEPTION (0<<0) 163 #define CD1400_COR5 0x1F /* channel option 5 */ 164 #define CD1400_COR5_ISTRIP (1<<7) 165 #define CD1400_COR5_LNEXT (1<<6) 166 #define CD1400_COR5_CMOE (1<<5) /* char matching on error */ 167 #define CD1400_COR5_EBD (1<<2) /* end of break detected */ 168 #define CD1400_COR5_ONLCR (1<<1) 169 #define CD1400_COR5_OCRNL (1<<0) 170 #define CD1400_CCSR 0x0B /* channel control status */ 171 #define CD1400_RDCR 0x0E /* received data count */ 172 #define CD1400_SCHR1 0x1A /* special character 1 */ 173 #define CD1400_SCHR2 0x1B /* special character 2 */ 174 #define CD1400_SCHR3 0x1C /* special character 3 */ 175 #define CD1400_SCHR4 0x1D /* special character 4 */ 176 #define CD1400_SCRL 0x22 /* special character range, low */ 177 #define CD1400_SCRH 0x23 /* special character range, high */ 178 #define CD1400_LNC 0x24 /* lnext character */ 179 #define CD1400_MCOR1 0x15 /* modem change option 1 */ 180 #define CD1400_MCOR1_DSRzd (1<<7) /* DSR one-to-zero delta */ 181 #define CD1400_MCOR1_CTSzd (1<<6) 182 #define CD1400_MCOR1_RIzd (1<<5) 183 #define CD1400_MCOR1_CDzd (1<<4) 184 #define CD1400_MCOR1_DTRth (15<<0) /* dtrflow threshold */ 185 #define CD1400_MCOR2 0x16 /* modem change option 2 */ 186 #define CD1400_MCOR2_DSRod (1<<7) /* DSR zero-to-one delta */ 187 #define CD1400_MCOR2_CTSod (1<<6) 188 #define CD1400_MCOR2_RIod (1<<5) 189 #define CD1400_MCOR2_CDod (1<<4) 190 #define CD1400_RTPR 0x21 /* receive timeout period */ 191 #define CD1400_MSVR1 0x6C /* modem signal value 1 */ 192 #define CD1400_MSVR1_RTS (1<<0) /* RTS line (r/w) */ 193 #define CD1400_MSVR2 0x6D /* modem signal value 2 */ 194 #define CD1400_MSVR2_DSR (1<<7) /* !DSR line (r) */ 195 #define CD1400_MSVR2_CTS (1<<6) /* !CTS line (r) */ 196 #define CD1400_MSVR2_RI (1<<5) /* !RI line (r) */ 197 #define CD1400_MSVR2_CD (1<<4) /* !CD line (r) */ 198 #define CD1400_MSVR2_DTR (1<<1) /* DTR line (r/w) */ 199 #define CD1400_PSVR 0x6F /* printer signal value */ 200 #define CD1400_RBPR 0x78 /* receive baud rate period */ 201 #define CD1400_RCOR 0x7C /* receive clock option */ 202 #define CD1400_TBPR 0x72 /* transmit baud rate period */ 203 #define CD1400_TCOR 0x76 /* transmit clock option */ 204