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 */