1 /*-
2 * Copyright (c) 2004-2006 Marcel Moolenaar
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 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/bus.h>
33 #include <sys/conf.h>
34 #include <machine/bus.h>
35 #include <sys/rman.h>
36 #include <sys/serial.h>
37
38 #include <dev/scc/scc_bfe.h>
39 #include <dev/scc/scc_bus.h>
40
41 #include <dev/ic/sab82532.h>
42
43 #include "scc_if.h"
44
45 static int sab82532_bfe_attach(struct scc_softc *, int);
46 static int sab82532_bfe_iclear(struct scc_softc *, struct scc_chan *);
47 static int sab82532_bfe_ipend(struct scc_softc *);
48 static int sab82532_bfe_probe(struct scc_softc *);
49
50 static kobj_method_t sab82532_methods[] = {
51 KOBJMETHOD(scc_attach, sab82532_bfe_attach),
52 KOBJMETHOD(scc_iclear, sab82532_bfe_iclear),
53 KOBJMETHOD(scc_ipend, sab82532_bfe_ipend),
54 KOBJMETHOD(scc_probe, sab82532_bfe_probe),
55 KOBJMETHOD_END
56 };
57
58 struct scc_class scc_sab82532_class = {
59 "sab82532 class",
60 sab82532_methods,
61 sizeof(struct scc_softc),
62 .cl_channels = SAB_NCHAN,
63 .cl_class = SCC_CLASS_SAB82532,
64 .cl_modes = SCC_MODE_ASYNC | SCC_MODE_BISYNC | SCC_MODE_HDLC,
65 .cl_range = SAB_CHANLEN,
66 };
67
68 static int
sab82532_bfe_attach(struct scc_softc * sc __unused,int reset __unused)69 sab82532_bfe_attach(struct scc_softc *sc __unused, int reset __unused)
70 {
71
72 return (0);
73 }
74
75 static int
sab82532_bfe_iclear(struct scc_softc * sc,struct scc_chan * ch)76 sab82532_bfe_iclear(struct scc_softc *sc, struct scc_chan *ch)
77 {
78 struct scc_bas *bas;
79 int i, ofs, rbcl;
80
81 bas = &sc->sc_bas;
82 ofs = (ch->ch_nr - 1) * SAB_CHANLEN;
83 mtx_lock_spin(&sc->sc_hwmtx);
84 if (ch->ch_ipend & SER_INT_RXREADY) {
85 if (scc_getreg(bas, ofs + SAB_STAR) & SAB_STAR_RFNE) {
86 rbcl = scc_getreg(bas, ofs + SAB_RBCL) & 31;
87 if (rbcl == 0)
88 rbcl = 32;
89 for (i = 0; i < rbcl; i += 2) {
90 (void)scc_getreg(bas, ofs + SAB_RFIFO);
91 (void)scc_getreg(bas, ofs + SAB_RFIFO + 1);
92 }
93 }
94 while (scc_getreg(bas, ofs + SAB_STAR) & SAB_STAR_CEC)
95 ;
96 scc_setreg(bas, ofs + SAB_CMDR, SAB_CMDR_RMC);
97 scc_barrier(bas);
98 }
99 mtx_unlock_spin(&sc->sc_hwmtx);
100 return (0);
101 }
102
103 static int
sab82532_bfe_ipend(struct scc_softc * sc)104 sab82532_bfe_ipend(struct scc_softc *sc)
105 {
106 struct scc_bas *bas;
107 struct scc_chan *ch;
108 int ipend;
109 int c, ofs;
110 uint8_t isr0, isr1;
111
112 bas = &sc->sc_bas;
113 ipend = 0;
114 for (c = 0; c < SAB_NCHAN; c++) {
115 ch = &sc->sc_chan[c];
116 ofs = c * SAB_CHANLEN;
117 mtx_lock_spin(&sc->sc_hwmtx);
118 isr0 = scc_getreg(bas, ofs + SAB_ISR0);
119 isr1 = scc_getreg(bas, ofs + SAB_ISR1);
120 scc_barrier(bas);
121 if (isr0 & SAB_ISR0_TIME) {
122 while (scc_getreg(bas, ofs + SAB_STAR) & SAB_STAR_CEC)
123 ;
124 scc_setreg(bas, ofs + SAB_CMDR, SAB_CMDR_RFRD);
125 scc_barrier(bas);
126 }
127 mtx_unlock_spin(&sc->sc_hwmtx);
128
129 ch->ch_ipend = 0;
130 if (isr1 & SAB_ISR1_BRKT)
131 ch->ch_ipend |= SER_INT_BREAK;
132 if (isr0 & SAB_ISR0_RFO)
133 ch->ch_ipend |= SER_INT_OVERRUN;
134 if (isr0 & (SAB_ISR0_TCD|SAB_ISR0_RPF))
135 ch->ch_ipend |= SER_INT_RXREADY;
136 if ((isr0 & SAB_ISR0_CDSC) || (isr1 & SAB_ISR1_CSC))
137 ch->ch_ipend |= SER_INT_SIGCHG;
138 if (isr1 & SAB_ISR1_ALLS)
139 ch->ch_ipend |= SER_INT_TXIDLE;
140 ipend |= ch->ch_ipend;
141 }
142 return (ipend);
143 }
144
145 static int
sab82532_bfe_probe(struct scc_softc * sc __unused)146 sab82532_bfe_probe(struct scc_softc *sc __unused)
147 {
148
149 return (0);
150 }
151