1 /* $NetBSD: gpio.c,v 1.17 2023/12/20 15:29:04 thorpej Exp $ */
2
3 /*-
4 * Copyright (C) 1998 Internet Research Institute, Inc.
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 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by
18 * Internet Research Institute, Inc.
19 * 4. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include <sys/cdefs.h>
35 __KERNEL_RCSID(0, "$NetBSD: gpio.c,v 1.17 2023/12/20 15:29:04 thorpej Exp $");
36
37 #include <sys/types.h>
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/kernel.h>
41 #include <sys/device.h>
42 #include <machine/autoconf.h>
43 #include <machine/pio.h>
44
45 #include <dev/ofw/openfirm.h>
46
47 #include "adb.h"
48
49 static void gpio_obio_attach (device_t, device_t, void *);
50 static int gpio_obio_match (device_t, cfdata_t, void *);
51 static int gpio_obio_print (void *aux, const char *gpio);
52
53 static void gpio_gpio_attach (device_t, device_t, void *);
54 static int gpio_gpio_match (device_t, cfdata_t, void *);
55 static int gpio_intr (void *);
56
57 struct gpio_softc {
58 u_int8_t *sc_port;
59 };
60
61 CFATTACH_DECL_NEW(gpio_obio, sizeof(struct gpio_softc),
62 gpio_obio_match, gpio_obio_attach, NULL, NULL);
63
64 CFATTACH_DECL_NEW(gpio_gpio, sizeof(struct gpio_softc),
65 gpio_gpio_match, gpio_gpio_attach, NULL, NULL);
66
67 extern struct cfdriver gpio_cd;
68
69 int
gpio_obio_match(device_t parent,cfdata_t cf,void * aux)70 gpio_obio_match(device_t parent, cfdata_t cf, void *aux)
71 {
72 struct confargs *ca = aux;
73
74 if (strcmp(ca->ca_name, "gpio") != 0)
75 return 0;
76
77 if (ca->ca_nreg == 0)
78 return 0;
79
80 return 1;
81 }
82
83 void
gpio_obio_attach(device_t parent,device_t self,void * aux)84 gpio_obio_attach(device_t parent, device_t self, void *aux)
85 {
86 struct gpio_softc *sc = device_private(self);
87 struct confargs *ca = aux, ca2;
88 int child;
89 int namelen;
90 int intr[6];
91 u_int reg[20];
92 char name[32];
93
94 printf("\n");
95
96 sc->sc_port = mapiodev(ca->ca_baseaddr + ca->ca_reg[0], ca->ca_reg[1],
97 false);
98
99 devhandle_t selfh = device_handle(self);
100 ca2.ca_baseaddr = ca->ca_baseaddr;
101 for (child = OF_child(ca->ca_node); child; child = OF_peer(child)) {
102 namelen = OF_getprop(child, "name", name, sizeof(name));
103 if (namelen < 0)
104 continue;
105 if (namelen >= sizeof(name))
106 continue;
107
108 name[namelen] = 0;
109 ca2.ca_name = name;
110 ca2.ca_node = child;
111
112 ca2.ca_nreg = OF_getprop(child, "reg", reg, sizeof(reg));
113 ca2.ca_nintr = OF_getprop(child, "AAPL,interrupts", intr,
114 sizeof(intr));
115 if (ca2.ca_nintr == -1)
116 ca2.ca_nintr = OF_getprop(child, "interrupts", intr,
117 sizeof(intr));
118
119 ca2.ca_reg = reg;
120 ca2.ca_intr = intr;
121
122 config_found(self, &ca2, gpio_obio_print,
123 CFARGS(.devhandle = devhandle_from_of(selfh, child)));
124 }
125 }
126
127 int
gpio_obio_print(void * aux,const char * gpio)128 gpio_obio_print(void *aux, const char *gpio)
129 {
130 struct confargs *ca = aux;
131
132 if (gpio)
133 aprint_normal("%s at %s", ca->ca_name, gpio);
134
135 if (ca->ca_nreg > 0)
136 aprint_normal(" offset 0x%x", ca->ca_reg[0]);
137
138 return UNCONF;
139 }
140
141 int
gpio_gpio_match(device_t parent,cfdata_t cf,void * aux)142 gpio_gpio_match(device_t parent, cfdata_t cf, void *aux)
143 {
144 struct confargs *ca = aux;
145
146 if (strcmp(ca->ca_name, "extint-gpio1") != 0)
147 return 0;
148
149 if (ca->ca_nintr < 0)
150 return 0;
151
152 return 1;
153 }
154
155 void
gpio_gpio_attach(device_t parent,device_t self,void * aux)156 gpio_gpio_attach(device_t parent, device_t self, void *aux)
157 {
158 struct gpio_softc *sc = device_private(self);
159 struct confargs *ca = aux;
160
161
162 sc->sc_port = device_private(parent)->sc_port;
163 intr_establish_xname(ca->ca_intr[0], IST_LEVEL, IPL_HIGH, gpio_intr, sc,
164 device_xname(self));
165
166 printf(" irq %d\n", ca->ca_intr[0]);
167 }
168
169 #if NADB > 0
170 extern int adb_intr (void *);
171 extern struct cfdriver adb_cd;
172 #endif
173
174 int
gpio_intr(void * arg)175 gpio_intr(void *arg)
176 {
177 int rv = 0;
178
179 #if NADB > 0
180 struct gpio_softc *sc;
181
182 sc = device_lookup_private(&adb_cd, 0);
183 if (sc != NULL)
184 rv = adb_intr(sc);
185 #endif
186
187 return rv;
188 }
189