1 /* $NetBSD: com_jensenio.c,v 1.19 2021/05/07 16:58:34 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1999 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
33
34 __KERNEL_RCSID(0, "$NetBSD: com_jensenio.c,v 1.19 2021/05/07 16:58:34 thorpej Exp $");
35
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/ioctl.h>
39 #include <sys/select.h>
40 #include <sys/tty.h>
41 #include <sys/proc.h>
42 #include <sys/conf.h>
43 #include <sys/file.h>
44 #include <sys/uio.h>
45 #include <sys/kernel.h>
46 #include <sys/syslog.h>
47 #include <sys/types.h>
48 #include <sys/device.h>
49 #include <sys/cpu.h>
50
51 #include <machine/intr.h>
52 #include <sys/bus.h>
53
54 #include <dev/ic/comreg.h>
55 #include <dev/ic/comvar.h>
56
57 #include <dev/eisa/eisavar.h>
58
59 #include <dev/isa/isavar.h>
60
61 #include <alpha/jensenio/jenseniovar.h>
62
63 struct com_jensenio_softc {
64 struct com_softc sc_com; /* real "com" softc */
65
66 /* Jensen-specific goo. */
67 struct jensenio_scb_intrhand sc_jih;
68 };
69
70 static int com_jensenio_match(device_t, cfdata_t , void *);
71 static void com_jensenio_attach(device_t, device_t, void *);
72
73 CFATTACH_DECL_NEW(com_jensenio, sizeof(struct com_jensenio_softc),
74 com_jensenio_match, com_jensenio_attach, NULL, NULL);
75
76 static int
com_jensenio_match(device_t parent,cfdata_t match,void * aux)77 com_jensenio_match(device_t parent, cfdata_t match, void *aux)
78 {
79 struct jensenio_attach_args *ja = aux;
80
81 /* Always present. */
82 if (strcmp(ja->ja_name, match->cf_name) == 0)
83 return (1);
84
85 return (0);
86 }
87
88 static void
com_jensenio_attach(device_t parent,device_t self,void * aux)89 com_jensenio_attach(device_t parent, device_t self, void *aux)
90 {
91 struct com_jensenio_softc *jsc = device_private(self);
92 struct com_softc *sc = &jsc->sc_com;
93 struct jensenio_attach_args *ja = aux;
94 bus_space_handle_t ioh;
95
96 sc->sc_dev = self;
97 if (com_is_console(ja->ja_iot, ja->ja_ioaddr, &ioh) == 0 &&
98 bus_space_map(ja->ja_iot, ja->ja_ioaddr, COM_NPORTS, 0,
99 &ioh) != 0) {
100 aprint_error(": can't map i/o space\n");
101 return;
102 }
103 com_init_regs(&sc->sc_regs, ja->ja_iot, ioh, ja->ja_ioaddr);
104
105 sc->sc_frequency = COM_FREQ;
106
107 /*
108 * According to comments in Linux drivers/tty/serial/8250/8250.h,
109 * the driver has to set OUT1 and OUT2 lines for "some ALPHA"
110 * otherwise "the machine locks up with endless interrupts."
111 * Note OUT2 (MCR_IENABLE) is set in MI com_attach_subr()
112 * so we have to set OUT1 (MCR_DSR) in the MD attachment.
113 * See also PR/36628.
114 */
115 SET(sc->sc_mcr, MCR_DRS);
116
117 com_attach_subr(sc);
118
119 jensenio_intr_establish(&jsc->sc_jih, ja->ja_irq[0],
120 0, comintr, sc);
121
122 aprint_normal_dev(self, "interrupting at vector 0x%x\n",
123 ja->ja_irq[0]);
124
125 if (!pmf_device_register1(self, com_suspend, com_resume, com_cleanup)) {
126 aprint_error_dev(self, "could not establish shutdown hook");
127 }
128 }
129