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smuiic.c revision 1.6 
      1 /*	$NetBSD: smuiic.c,v 1.6 2021/02/25 20:51:10 macallan Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2013 Phileas Fogg
      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  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/param.h>
     30 #include <sys/systm.h>
     31 #include <sys/kernel.h>
     32 #include <sys/malloc.h>
     33 #include <sys/device.h>
     34 #include <sys/proc.h>
     35 #include <sys/mutex.h>
     36 #include <sys/sysctl.h>
     37 
     38 #include <machine/autoconf.h>
     39 
     40 #include <dev/ofw/openfirm.h>
     41 #include <dev/i2c/i2cvar.h>
     42 
     43 #include <macppc/dev/smuvar.h>
     44 #include <macppc/dev/smuiicvar.h>
     45 
     46 struct smuiic_softc {
     47 	device_t sc_dev;
     48 	int sc_node;
     49 	struct i2c_controller *sc_i2c;
     50 };
     51 
     52 static int smuiic_match(device_t, struct cfdata *, void *);
     53 static void smuiic_attach(device_t, device_t, void *);
     54 
     55 CFATTACH_DECL_NEW(smuiic, sizeof(struct smuiic_softc),
     56     smuiic_match, smuiic_attach, NULL, NULL);
     57 
     58 static int
     59 smuiic_match(device_t parent, struct cfdata *cf, void *aux)
     60 {
     61 	struct smu_iicbus_confargs *ca = aux;
     62 
     63 	if (strcmp(ca->ca_name, "i2c-bus") == 0)
     64 		return 5;
     65 	if (strcmp(ca->ca_name, "i2c") == 0)
     66 		return 5;
     67 
     68 	return 0;
     69 }
     70 
     71 static void
     72 smuiic_attach(device_t parent, device_t self, void *aux)
     73 {
     74 	struct smu_iicbus_confargs *ca = aux;
     75 	struct smuiic_softc *sc = device_private(self);
     76 	struct i2cbus_attach_args iba;
     77 	prop_dictionary_t dict = device_properties(self);
     78 	int devs, devc;
     79 	uint32_t addr;
     80 	char compat[256];
     81 	prop_array_t cfg;
     82 	prop_dictionary_t dev;
     83 	prop_data_t data;
     84 	char name[32], descr[32], num[8];
     85 
     86 	sc->sc_dev = self;
     87 	sc->sc_node = ca->ca_node;
     88 	sc->sc_i2c = ca->ca_tag;
     89 	printf("\n");
     90 
     91 	cfg = prop_array_create();
     92 	prop_dictionary_set(dict, "i2c-child-devices", cfg);
     93 	prop_object_release(cfg);
     94 
     95 	/* look for i2c devices */
     96 	devs = OF_child(sc->sc_node);
     97 	while (devs != 0) {
     98 		if (OF_getprop(devs, "name", name, 256) <= 0)
     99 			goto skip;
    100 		if (OF_getprop(devs, "compatible",
    101 		    compat, 256) <= 0)
    102 			goto skip;
    103 		if (OF_getprop(devs, "reg", &addr, 4) <= 0)
    104 			goto skip;
    105 		addr = (addr & 0xff) >> 1;
    106 		dev = prop_dictionary_create();
    107 		prop_dictionary_set_string(dev, "name", name);
    108 		data = prop_data_create_copy(compat, strlen(compat)+1);
    109 		prop_dictionary_set(dev, "compatible", data);
    110 		prop_object_release(data);
    111 		prop_dictionary_set_uint32(dev, "addr", addr);
    112 		prop_dictionary_set_uint64(dev, "cookie", devs);
    113 		devc = OF_child(devs);
    114 		while (devc != 0) {
    115 			int reg;
    116 			if (OF_getprop(devc, "reg", &reg, 4) < 4) goto nope;
    117 			if (OF_getprop(devc, "location", descr, 32) <= 0)
    118 				goto nope;
    119 			printf("found '%s' at %02x\n", descr, reg);
    120 			snprintf(num, 7, "s%02x", reg);
    121 			prop_dictionary_set_string(dev, num, descr);
    122 		nope:
    123 			devc = OF_peer(devc);
    124 		}
    125 		prop_array_add(cfg, dev);
    126 		prop_object_release(dev);
    127 	skip:
    128 		devs = OF_peer(devs);
    129 	}
    130 
    131 	memset(&iba, 0, sizeof(iba));
    132 	iba.iba_tag = sc->sc_i2c;
    133 
    134 	config_found_ia(sc->sc_dev, "i2cbus", &iba, iicbus_print);
    135 }
    136