xref: /freebsd/sys/dev/scc/scc_dev_quicc.c (revision c4b1deaf0d05e7ba715124b4c752edef80222115)
1e1ef7811SRafal Jaworowski /*-
2e1ef7811SRafal Jaworowski  * Copyright (c) 2004-2006 Marcel Moolenaar
3e1ef7811SRafal Jaworowski  * All rights reserved.
4e1ef7811SRafal Jaworowski  *
5e1ef7811SRafal Jaworowski  * Redistribution and use in source and binary forms, with or without
6e1ef7811SRafal Jaworowski  * modification, are permitted provided that the following conditions
7e1ef7811SRafal Jaworowski  * are met:
8e1ef7811SRafal Jaworowski  *
9e1ef7811SRafal Jaworowski  * 1. Redistributions of source code must retain the above copyright
10e1ef7811SRafal Jaworowski  *    notice, this list of conditions and the following disclaimer.
11e1ef7811SRafal Jaworowski  * 2. Redistributions in binary form must reproduce the above copyright
12e1ef7811SRafal Jaworowski  *    notice, this list of conditions and the following disclaimer in the
13e1ef7811SRafal Jaworowski  *    documentation and/or other materials provided with the distribution.
14e1ef7811SRafal Jaworowski  *
15e1ef7811SRafal Jaworowski  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16e1ef7811SRafal Jaworowski  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17e1ef7811SRafal Jaworowski  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18e1ef7811SRafal Jaworowski  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19e1ef7811SRafal Jaworowski  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20e1ef7811SRafal Jaworowski  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21e1ef7811SRafal Jaworowski  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22e1ef7811SRafal Jaworowski  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23e1ef7811SRafal Jaworowski  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24e1ef7811SRafal Jaworowski  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25e1ef7811SRafal Jaworowski  */
26e1ef7811SRafal Jaworowski 
27e1ef7811SRafal Jaworowski #include <sys/cdefs.h>
28e1ef7811SRafal Jaworowski __FBSDID("$FreeBSD$");
29e1ef7811SRafal Jaworowski 
30e1ef7811SRafal Jaworowski #include <sys/param.h>
31e1ef7811SRafal Jaworowski #include <sys/systm.h>
32e1ef7811SRafal Jaworowski #include <sys/bus.h>
33e1ef7811SRafal Jaworowski #include <sys/conf.h>
34e1ef7811SRafal Jaworowski #include <machine/bus.h>
35e1ef7811SRafal Jaworowski #include <sys/rman.h>
36e1ef7811SRafal Jaworowski #include <sys/serial.h>
37e1ef7811SRafal Jaworowski 
38e1ef7811SRafal Jaworowski #include <dev/scc/scc_bfe.h>
39e1ef7811SRafal Jaworowski #include <dev/scc/scc_bus.h>
40e1ef7811SRafal Jaworowski 
41e1ef7811SRafal Jaworowski #include <dev/ic/quicc.h>
42e1ef7811SRafal Jaworowski 
43e1ef7811SRafal Jaworowski #include "scc_if.h"
44e1ef7811SRafal Jaworowski 
45e1ef7811SRafal Jaworowski #define	quicc_read2(bas, reg)		\
46e1ef7811SRafal Jaworowski 	bus_space_read_2((bas)->bst, (bas)->bsh, reg)
47e1ef7811SRafal Jaworowski 
48e1ef7811SRafal Jaworowski #define	quicc_write2(bas, reg, val)	\
49e1ef7811SRafal Jaworowski 	bus_space_write_2((bas)->bst, (bas)->bsh, reg, val)
50e1ef7811SRafal Jaworowski 
51e1ef7811SRafal Jaworowski static int quicc_bfe_attach(struct scc_softc *, int);
52e1ef7811SRafal Jaworowski static int quicc_bfe_enabled(struct scc_softc *, struct scc_chan *);
53e1ef7811SRafal Jaworowski static int quicc_bfe_iclear(struct scc_softc *, struct scc_chan *);
54e1ef7811SRafal Jaworowski static int quicc_bfe_ipend(struct scc_softc *);
55e1ef7811SRafal Jaworowski static int quicc_bfe_probe(struct scc_softc *);
56e1ef7811SRafal Jaworowski 
57e1ef7811SRafal Jaworowski static kobj_method_t quicc_methods[] = {
58e1ef7811SRafal Jaworowski 	KOBJMETHOD(scc_attach,	quicc_bfe_attach),
59e1ef7811SRafal Jaworowski 	KOBJMETHOD(scc_enabled,	quicc_bfe_enabled),
60e1ef7811SRafal Jaworowski 	KOBJMETHOD(scc_iclear,	quicc_bfe_iclear),
61e1ef7811SRafal Jaworowski 	KOBJMETHOD(scc_ipend,	quicc_bfe_ipend),
62e1ef7811SRafal Jaworowski 	KOBJMETHOD(scc_probe,	quicc_bfe_probe),
63*c4b1deafSMarius Strobl 	KOBJMETHOD_END
64e1ef7811SRafal Jaworowski };
65e1ef7811SRafal Jaworowski 
66e1ef7811SRafal Jaworowski struct scc_class scc_quicc_class = {
67e1ef7811SRafal Jaworowski 	"QUICC class",
68e1ef7811SRafal Jaworowski 	quicc_methods,
69e1ef7811SRafal Jaworowski 	sizeof(struct scc_softc),
70e1ef7811SRafal Jaworowski 	.cl_channels = 4,
71e1ef7811SRafal Jaworowski 	.cl_class = SCC_CLASS_QUICC,
72e1ef7811SRafal Jaworowski 	.cl_modes = SCC_MODE_ASYNC | SCC_MODE_BISYNC | SCC_MODE_HDLC,
73e1ef7811SRafal Jaworowski 	.cl_range = 0,
74e1ef7811SRafal Jaworowski };
75e1ef7811SRafal Jaworowski 
76e1ef7811SRafal Jaworowski static int
77*c4b1deafSMarius Strobl quicc_bfe_attach(struct scc_softc *sc __unused, int reset __unused)
78e1ef7811SRafal Jaworowski {
79e1ef7811SRafal Jaworowski 
80e1ef7811SRafal Jaworowski 	return (0);
81e1ef7811SRafal Jaworowski }
82e1ef7811SRafal Jaworowski 
83e1ef7811SRafal Jaworowski static int
84e1ef7811SRafal Jaworowski quicc_bfe_enabled(struct scc_softc *sc, struct scc_chan *ch)
85e1ef7811SRafal Jaworowski {
86e1ef7811SRafal Jaworowski 	struct scc_bas *bas;
87e1ef7811SRafal Jaworowski 	int unit;
88e1ef7811SRafal Jaworowski 	uint16_t val0, val1;
89e1ef7811SRafal Jaworowski 
90e1ef7811SRafal Jaworowski 	bas = &sc->sc_bas;
91e1ef7811SRafal Jaworowski 	unit = ch->ch_nr - 1;
92e1ef7811SRafal Jaworowski 	val0 = quicc_read2(bas, QUICC_REG_SCC_TODR(unit));
93e1ef7811SRafal Jaworowski 	quicc_write2(bas, QUICC_REG_SCC_TODR(unit), ~val0);
94e1ef7811SRafal Jaworowski 	val1 = quicc_read2(bas, QUICC_REG_SCC_TODR(unit));
95e1ef7811SRafal Jaworowski 	quicc_write2(bas, QUICC_REG_SCC_TODR(unit), val0);
96e1ef7811SRafal Jaworowski 	return (((val0 | val1) == 0x8000) ? 1 : 0);
97e1ef7811SRafal Jaworowski }
98e1ef7811SRafal Jaworowski 
99e1ef7811SRafal Jaworowski static int
100e1ef7811SRafal Jaworowski quicc_bfe_iclear(struct scc_softc *sc, struct scc_chan *ch)
101e1ef7811SRafal Jaworowski {
102*c4b1deafSMarius Strobl 	struct scc_bas *bas;
103*c4b1deafSMarius Strobl 	uint16_t rb, st;
104e1ef7811SRafal Jaworowski 
105*c4b1deafSMarius Strobl 	bas = &sc->sc_bas;
106*c4b1deafSMarius Strobl 	mtx_lock_spin(&sc->sc_hwmtx);
107*c4b1deafSMarius Strobl 	if (ch->ch_ipend & SER_INT_RXREADY) {
108*c4b1deafSMarius Strobl 		rb = quicc_read2(bas, QUICC_PRAM_SCC_RBASE(ch->ch_nr - 1));
109*c4b1deafSMarius Strobl 		st = quicc_read2(bas, rb);
110*c4b1deafSMarius Strobl 		(void)quicc_read4(bas, rb + 4);
111*c4b1deafSMarius Strobl 		quicc_write2(bas, rb, st | 0x9000);
112*c4b1deafSMarius Strobl 	}
113*c4b1deafSMarius Strobl 	mtx_unlock_spin(&sc->sc_hwmtx);
114e1ef7811SRafal Jaworowski 	return (0);
115e1ef7811SRafal Jaworowski }
116e1ef7811SRafal Jaworowski 
117e1ef7811SRafal Jaworowski static int
118e1ef7811SRafal Jaworowski quicc_bfe_ipend(struct scc_softc *sc)
119e1ef7811SRafal Jaworowski {
120e1ef7811SRafal Jaworowski 	struct scc_bas *bas;
121e1ef7811SRafal Jaworowski 	struct scc_chan *ch;
122e1ef7811SRafal Jaworowski 	int c, ipend;
123e1ef7811SRafal Jaworowski 	uint16_t scce;
124e1ef7811SRafal Jaworowski 
125e1ef7811SRafal Jaworowski 	bas = &sc->sc_bas;
126e1ef7811SRafal Jaworowski 	ipend = 0;
127e1ef7811SRafal Jaworowski 	for (c = 0; c < 4; c++) {
128e1ef7811SRafal Jaworowski 		ch = &sc->sc_chan[c];
129e1ef7811SRafal Jaworowski 		if (!ch->ch_enabled)
130e1ef7811SRafal Jaworowski 			continue;
131e1ef7811SRafal Jaworowski 		ch->ch_ipend = 0;
132e1ef7811SRafal Jaworowski 		mtx_lock_spin(&sc->sc_hwmtx);
133e1ef7811SRafal Jaworowski 		scce = quicc_read2(bas, QUICC_REG_SCC_SCCE(c));
134e1ef7811SRafal Jaworowski 		quicc_write2(bas, QUICC_REG_SCC_SCCE(c), ~0);
135e1ef7811SRafal Jaworowski 		mtx_unlock_spin(&sc->sc_hwmtx);
136e1ef7811SRafal Jaworowski 		if (scce & 0x0001)
137e1ef7811SRafal Jaworowski 			ch->ch_ipend |= SER_INT_RXREADY;
138e1ef7811SRafal Jaworowski 		if (scce & 0x0002)
139e1ef7811SRafal Jaworowski 			ch->ch_ipend |= SER_INT_TXIDLE;
140e1ef7811SRafal Jaworowski 		if (scce & 0x0004)
141e1ef7811SRafal Jaworowski 			ch->ch_ipend |= SER_INT_OVERRUN;
142e1ef7811SRafal Jaworowski 		if (scce & 0x0020)
143e1ef7811SRafal Jaworowski 			ch->ch_ipend |= SER_INT_BREAK;
144e1ef7811SRafal Jaworowski 		/* XXX SIGNALS */
145e1ef7811SRafal Jaworowski 		ipend |= ch->ch_ipend;
146e1ef7811SRafal Jaworowski 	}
147e1ef7811SRafal Jaworowski 	return (ipend);
148e1ef7811SRafal Jaworowski }
149e1ef7811SRafal Jaworowski 
150e1ef7811SRafal Jaworowski static int
151*c4b1deafSMarius Strobl quicc_bfe_probe(struct scc_softc *sc __unused)
152e1ef7811SRafal Jaworowski {
153e1ef7811SRafal Jaworowski 
154e1ef7811SRafal Jaworowski 	return (0);
155e1ef7811SRafal Jaworowski }
156