1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2004-2006 Marcel Moolenaar
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 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/bus.h>
35 #include <sys/conf.h>
36 #include <machine/bus.h>
37 #include <sys/rman.h>
38 #include <sys/serial.h>
39
40 #include <dev/scc/scc_bfe.h>
41 #include <dev/scc/scc_bus.h>
42
43 #include <dev/ic/z8530.h>
44
45 #include "scc_if.h"
46
47 static int z8530_bfe_attach(struct scc_softc *, int);
48 static int z8530_bfe_iclear(struct scc_softc *, struct scc_chan *);
49 static int z8530_bfe_ipend(struct scc_softc *);
50 static int z8530_bfe_probe(struct scc_softc *);
51
52 static kobj_method_t z8530_methods[] = {
53 KOBJMETHOD(scc_attach, z8530_bfe_attach),
54 KOBJMETHOD(scc_iclear, z8530_bfe_iclear),
55 KOBJMETHOD(scc_ipend, z8530_bfe_ipend),
56 KOBJMETHOD(scc_probe, z8530_bfe_probe),
57 KOBJMETHOD_END
58 };
59
60 struct scc_class scc_z8530_class = {
61 "z8530 class",
62 z8530_methods,
63 sizeof(struct scc_softc),
64 .cl_channels = 2,
65 .cl_class = SCC_CLASS_Z8530,
66 .cl_modes = SCC_MODE_ASYNC | SCC_MODE_BISYNC | SCC_MODE_HDLC,
67 .cl_range = CHAN_B - CHAN_A,
68 };
69
70 /* Multiplexed I/O. */
71 static __inline uint8_t
scc_getmreg(struct scc_bas * bas,int ch,int reg)72 scc_getmreg(struct scc_bas *bas, int ch, int reg)
73 {
74
75 scc_setreg(bas, ch + REG_CTRL, reg);
76 scc_barrier(bas);
77 return (scc_getreg(bas, ch + REG_CTRL));
78 }
79
80 static int
z8530_bfe_attach(struct scc_softc * sc __unused,int reset __unused)81 z8530_bfe_attach(struct scc_softc *sc __unused, int reset __unused)
82 {
83
84 return (0);
85 }
86
87 static int
z8530_bfe_iclear(struct scc_softc * sc,struct scc_chan * ch)88 z8530_bfe_iclear(struct scc_softc *sc, struct scc_chan *ch)
89 {
90 struct scc_bas *bas;
91 int c;
92
93 bas = &sc->sc_bas;
94 c = (ch->ch_nr == 1) ? CHAN_A : CHAN_B;
95 mtx_lock_spin(&sc->sc_hwmtx);
96 if (ch->ch_ipend & SER_INT_TXIDLE) {
97 scc_setreg(bas, c + REG_CTRL, CR_RSTTXI);
98 scc_barrier(bas);
99 }
100 if (ch->ch_ipend & SER_INT_RXREADY) {
101 scc_getreg(bas, c + REG_DATA);
102 scc_barrier(bas);
103 }
104 if (ch->ch_ipend & (SER_INT_OVERRUN|SER_INT_BREAK))
105 scc_setreg(bas, c + REG_CTRL, CR_RSTERR);
106 mtx_unlock_spin(&sc->sc_hwmtx);
107 return (0);
108 }
109
110 #define SIGCHG(c, i, s, d) \
111 if (c) { \
112 i |= (i & s) ? s : s | d; \
113 } else { \
114 i = (i & s) ? (i & ~s) | d : i; \
115 }
116
117 static int
z8530_bfe_ipend(struct scc_softc * sc)118 z8530_bfe_ipend(struct scc_softc *sc)
119 {
120 struct scc_bas *bas;
121 struct scc_chan *ch[2];
122 uint32_t sig;
123 uint8_t bes, ip, src;
124
125 bas = &sc->sc_bas;
126 ch[0] = &sc->sc_chan[0];
127 ch[1] = &sc->sc_chan[1];
128 ch[0]->ch_ipend = 0;
129 ch[1]->ch_ipend = 0;
130
131 mtx_lock_spin(&sc->sc_hwmtx);
132 ip = scc_getmreg(bas, CHAN_A, RR_IP);
133 if (ip & IP_RIA)
134 ch[0]->ch_ipend |= SER_INT_RXREADY;
135 if (ip & IP_RIB)
136 ch[1]->ch_ipend |= SER_INT_RXREADY;
137 if (ip & IP_TIA)
138 ch[0]->ch_ipend |= SER_INT_TXIDLE;
139 if (ip & IP_TIB)
140 ch[1]->ch_ipend |= SER_INT_TXIDLE;
141 if (ip & IP_SIA) {
142 bes = scc_getmreg(bas, CHAN_A, CR_RSTXSI);
143 if (bes & BES_BRK)
144 ch[0]->ch_ipend |= SER_INT_BREAK;
145 sig = ch[0]->ch_hwsig;
146 SIGCHG(bes & BES_CTS, sig, SER_CTS, SER_DCTS);
147 SIGCHG(bes & BES_DCD, sig, SER_DCD, SER_DDCD);
148 SIGCHG(bes & BES_SYNC, sig, SER_DSR, SER_DDSR);
149 if (sig & SER_MASK_DELTA) {
150 ch[0]->ch_hwsig = sig;
151 ch[0]->ch_ipend |= SER_INT_SIGCHG;
152 }
153 src = scc_getmreg(bas, CHAN_A, RR_SRC);
154 if (src & SRC_OVR)
155 ch[0]->ch_ipend |= SER_INT_OVERRUN;
156 }
157 if (ip & IP_SIB) {
158 bes = scc_getmreg(bas, CHAN_B, CR_RSTXSI);
159 if (bes & BES_BRK)
160 ch[1]->ch_ipend |= SER_INT_BREAK;
161 sig = ch[1]->ch_hwsig;
162 SIGCHG(bes & BES_CTS, sig, SER_CTS, SER_DCTS);
163 SIGCHG(bes & BES_DCD, sig, SER_DCD, SER_DDCD);
164 SIGCHG(bes & BES_SYNC, sig, SER_DSR, SER_DDSR);
165 if (sig & SER_MASK_DELTA) {
166 ch[1]->ch_hwsig = sig;
167 ch[1]->ch_ipend |= SER_INT_SIGCHG;
168 }
169 src = scc_getmreg(bas, CHAN_B, RR_SRC);
170 if (src & SRC_OVR)
171 ch[1]->ch_ipend |= SER_INT_OVERRUN;
172 }
173 mtx_unlock_spin(&sc->sc_hwmtx);
174
175 return (ch[0]->ch_ipend | ch[1]->ch_ipend);
176 }
177
178 static int
z8530_bfe_probe(struct scc_softc * sc __unused)179 z8530_bfe_probe(struct scc_softc *sc __unused)
180 {
181
182 return (0);
183 }
184