sys/arch/macppc/dev/gpio.c

   1 /*      $NetBSD: gpio.c,v 1.8 2005/12/11 12:18:03 christos 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 1.8 2005/12/11 12:18:03 christos 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 (struct device *, struct device *, void *);
  51 static int gpio_obio_match (struct device *, struct cfdata *, void *);
  52 static int gpio_obio_print (void *aux, const char *gpio);
  53
  54 static void gpio_gpio_attach (struct device *, struct device *, void *);
  55 static int gpio_gpio_match (struct device *, struct cfdata *, void *);
  56 static int gpio_intr (void *);
  57
  58 struct gpio_softc {
  59         struct device sc_dev;
  60         u_int8_t *sc_port;
  61 };
  62
  63 CFATTACH_DECL(gpio_obio, sizeof(struct gpio_softc),
  64     gpio_obio_match, gpio_obio_attach, NULL, NULL);
  65
  66 CFATTACH_DECL(gpio_gpio, sizeof(struct gpio_softc),
  67     gpio_gpio_match, gpio_gpio_attach, NULL, NULL);
  68
  69 extern struct cfdriver gpio_cd;
  70
  71 int
  72 gpio_obio_match(struct device *parent, struct cfdata *cf, void *aux)
  73 {
  74         struct confargs *ca = aux;
  75
  76         if (strcmp(ca->ca_name, "gpio") != 0)
  77                 return 0;
  78
  79         if (ca->ca_nreg == 0)
  80                 return 0;
  81
  82         return 1;
  83 }
  84
  85 void
  86 gpio_obio_attach(struct device *parent, struct device *self, void *aux)
  87 {
  88         struct gpio_softc *sc = device_private(self);
  89         struct confargs *ca = aux, ca2;
  90         int child;
  91         int namelen;
  92         int intr[6];
  93         u_int reg[20];
  94         char name[32];
  95
  96         printf("\n");
  97
  98         sc->sc_port = mapiodev(ca->ca_baseaddr + ca->ca_reg[0], ca->ca_reg[1]);
  99
 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         }
 124 }
 125
 126 int
 127 gpio_obio_print(void *aux, const char *gpio)
 128 {
 129         struct confargs *ca = aux;
 130
 131         if (gpio)
 132                 aprint_normal("%s at %s", ca->ca_name, gpio);
 133
 134         if (ca->ca_nreg > 0)
 135                 aprint_normal(" offset 0x%x", ca->ca_reg[0]);
 136
 137         return UNCONF;
 138 }
 139
 140 int
 141 gpio_gpio_match(struct device *parent, struct cfdata *cf, void *aux)
 142 {
 143         struct confargs *ca = aux;
 144
 145         if (strcmp(ca->ca_name, "extint-gpio1") != 0)
 146                 return 0;
 147
 148         if (ca->ca_nintr < 0)
 149                 return 0;
 150
 151         return 1;
 152 }
 153
 154 void
 155 gpio_gpio_attach(struct device *parent, struct device *self, void *aux)
 156 {
 157         struct gpio_softc *sc = device_private(self);
 158         struct confargs *ca = aux;
 159
 160
 161         sc->sc_port = device_private(parent)->sc_port;
 162         intr_establish(ca->ca_intr[0], IST_LEVEL, IPL_HIGH, gpio_intr, sc);
 163
 164         printf(" irq %d\n", ca->ca_intr[0]);
 165 }
 166
 167 #if NADB > 0
 168 extern int adb_intr (void *);
 169 extern struct cfdriver adb_cd;
 170 #endif
 171
 172 int
 173 gpio_intr(void *arg)
 174 {
 175         int rv = 0;
 176
 177 #if NADB > 0
 178         struct gpio_softc *sc;
 179
 180         sc = device_lookup_private(&adb_cd, 0);
 181         if (sc != NULL)
 182                 rv = adb_intr(sc);
 183 #endif
 184
 185         return rv;
 186 }