gpio.c revision 1.16
1 /* $NetBSD: gpio.c,v 1.16 2022/01/22 11:49:16 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 1.16 2022/01/22 11:49:16 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 <sys/malloc.h> 43 #include <machine/autoconf.h> 44 #include <machine/pio.h> 45 46 #include <dev/ofw/openfirm.h> 47 48 #include "adb.h" 49 50 static void gpio_obio_attach (device_t, device_t, void *); 51 static int gpio_obio_match (device_t, cfdata_t, void *); 52 static int gpio_obio_print (void *aux, const char *gpio); 53 54 static void gpio_gpio_attach (device_t, device_t, void *); 55 static int gpio_gpio_match (device_t, cfdata_t, void *); 56 static int gpio_intr (void *); 57 58 struct gpio_softc { 59 u_int8_t *sc_port; 60 }; 61 62 CFATTACH_DECL_NEW(gpio_obio, sizeof(struct gpio_softc), 63 gpio_obio_match, gpio_obio_attach, NULL, NULL); 64 65 CFATTACH_DECL_NEW(gpio_gpio, sizeof(struct gpio_softc), 66 gpio_gpio_match, gpio_gpio_attach, NULL, NULL); 67 68 extern struct cfdriver gpio_cd; 69 70 int 71 gpio_obio_match(device_t parent, cfdata_t cf, void *aux) 72 { 73 struct confargs *ca = aux; 74 75 if (strcmp(ca->ca_name, "gpio") != 0) 76 return 0; 77 78 if (ca->ca_nreg == 0) 79 return 0; 80 81 return 1; 82 } 83 84 void 85 gpio_obio_attach(device_t parent, device_t self, void *aux) 86 { 87 struct gpio_softc *sc = device_private(self); 88 struct confargs *ca = aux, ca2; 89 int child; 90 int namelen; 91 int intr[6]; 92 u_int reg[20]; 93 char name[32]; 94 95 printf("\n"); 96 97 sc->sc_port = mapiodev(ca->ca_baseaddr + ca->ca_reg[0], ca->ca_reg[1], 98 false); 99 100 devhandle_t selfh = device_handle(self); 101 ca2.ca_baseaddr = ca->ca_baseaddr; 102 for (child = OF_child(ca->ca_node); child; child = OF_peer(child)) { 103 namelen = OF_getprop(child, "name", name, sizeof(name)); 104 if (namelen < 0) 105 continue; 106 if (namelen >= sizeof(name)) 107 continue; 108 109 name[namelen] = 0; 110 ca2.ca_name = name; 111 ca2.ca_node = child; 112 113 ca2.ca_nreg = OF_getprop(child, "reg", reg, sizeof(reg)); 114 ca2.ca_nintr = OF_getprop(child, "AAPL,interrupts", intr, 115 sizeof(intr)); 116 if (ca2.ca_nintr == -1) 117 ca2.ca_nintr = OF_getprop(child, "interrupts", intr, 118 sizeof(intr)); 119 120 ca2.ca_reg = reg; 121 ca2.ca_intr = intr; 122 123 config_found(self, &ca2, gpio_obio_print, 124 CFARGS(.devhandle = devhandle_from_of(selfh, child))); 125 } 126 } 127 128 int 129 gpio_obio_print(void *aux, const char *gpio) 130 { 131 struct confargs *ca = aux; 132 133 if (gpio) 134 aprint_normal("%s at %s", ca->ca_name, gpio); 135 136 if (ca->ca_nreg > 0) 137 aprint_normal(" offset 0x%x", ca->ca_reg[0]); 138 139 return UNCONF; 140 } 141 142 int 143 gpio_gpio_match(device_t parent, cfdata_t cf, void *aux) 144 { 145 struct confargs *ca = aux; 146 147 if (strcmp(ca->ca_name, "extint-gpio1") != 0) 148 return 0; 149 150 if (ca->ca_nintr < 0) 151 return 0; 152 153 return 1; 154 } 155 156 void 157 gpio_gpio_attach(device_t parent, device_t self, void *aux) 158 { 159 struct gpio_softc *sc = device_private(self); 160 struct confargs *ca = aux; 161 162 163 sc->sc_port = device_private(parent)->sc_port; 164 intr_establish_xname(ca->ca_intr[0], IST_LEVEL, IPL_HIGH, gpio_intr, sc, 165 device_xname(self)); 166 167 printf(" irq %d\n", ca->ca_intr[0]); 168 } 169 170 #if NADB > 0 171 extern int adb_intr (void *); 172 extern struct cfdriver adb_cd; 173 #endif 174 175 int 176 gpio_intr(void *arg) 177 { 178 int rv = 0; 179 180 #if NADB > 0 181 struct gpio_softc *sc; 182 183 sc = device_lookup_private(&adb_cd, 0); 184 if (sc != NULL) 185 rv = adb_intr(sc); 186 #endif 187 188 return rv; 189 } 190
Indexes created Wed Sep 24 15:09:51 GMT 2025