1 /* $NetBSD: com_intio.c,v 1.2 2018/12/08 17:46:13 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 2009 Tetsuya Isaki. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
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,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 /*
29 * PSX16550, High-speed RS-232C board
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: com_intio.c,v 1.2 2018/12/08 17:46:13 thorpej Exp $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/tty.h>
38 #include <sys/device.h>
39 #include <sys/bus.h>
40
41 #include <dev/ic/comreg.h>
42 #include <dev/ic/comvar.h>
43
44 #include <machine/cpu.h>
45
46 #include <arch/x68k/dev/intiovar.h>
47
48 #define COM_PSX16550_FREQ (22118400 / 2)
49 #define COM_PSX16550_SIZE (COM_NPORTS << 1)
50 #define COM_PSX16550_REG_VECT com_scratch
51
52 static int com_intio_match(device_t, cfdata_t, void *);
53 static void com_intio_attach(device_t, device_t, void *);
54
55 CFATTACH_DECL_NEW(com_intio, sizeof(struct com_softc),
56 com_intio_match, com_intio_attach, NULL, NULL);
57
58 static int
com_intio_match(device_t parent,cfdata_t cf,void * aux)59 com_intio_match(device_t parent, cfdata_t cf, void *aux)
60 {
61 struct intio_attach_args *ia = aux;
62 bus_space_tag_t iot;
63 bus_space_handle_t ioh;
64 int iobase;
65 int rv;
66
67 /* Check whether the board is inserted or not */
68 if (badaddr((void *)IIOV(ia->ia_addr)))
69 return 0;
70
71 ia->ia_size = COM_PSX16550_SIZE;
72 if (intio_map_allocate_region(parent, ia, INTIO_MAP_TESTONLY) < 0)
73 return 0;
74
75 iot = ia->ia_bst;
76 iobase = ia->ia_addr;
77
78 /* if it's in use as console, it's there. */
79 if (com_is_console(iot, iobase, NULL))
80 return 1;
81
82 if (bus_space_map(iot, iobase, ia->ia_size,
83 BUS_SPACE_MAP_SHIFTED_ODD, &ioh))
84 return 0;
85
86 rv = comprobe1(iot, ioh);
87 bus_space_unmap(iot, ioh, ia->ia_size);
88
89 return rv;
90 }
91
92 static void
com_intio_attach(device_t parent,device_t self,void * aux)93 com_intio_attach(device_t parent, device_t self, void *aux)
94 {
95 struct com_softc *sc = device_private(self);
96 struct intio_attach_args *ia = aux;
97 bus_space_tag_t iot;
98 bus_space_handle_t ioh;
99 int iobase;
100
101 intio_map_allocate_region(parent, ia, INTIO_MAP_ALLOCATE);
102
103 sc->sc_dev = self;
104 iot = ia->ia_bst;
105 iobase = ia->ia_addr;
106 if (bus_space_map(iot, iobase, ia->ia_size,
107 BUS_SPACE_MAP_SHIFTED_ODD, &ioh)) {
108 aprint_error(": can't map I/O space\n");
109 return;
110 }
111
112 /* check and set interrupt vector */
113 if (ia->ia_intr < 16 || ia->ia_intr > 255) {
114 aprint_error(": invalid intr vector (0x%02x)\n", ia->ia_intr);
115 return;
116 }
117 bus_space_write_1(iot, ioh, COM_PSX16550_REG_VECT, ia->ia_intr);
118
119 sc->sc_frequency = COM_PSX16550_FREQ;
120 com_init_regs(&sc->sc_regs, iot, ioh, iobase);
121
122 /* PSX16550 uses MCR_DRS to switch interrupt priority level */
123 SET(sc->sc_mcr, MCR_DRS); /* 0: ipl2 / 1: ipl4 */
124
125 com_attach_subr(sc);
126
127 if (intio_intr_establish(ia->ia_intr, device_xname(self),
128 comintr, sc))
129 aprint_error_dev(self, "can't establish interrupt handler\n");
130 }
131