120 lines
3.4 KiB
C
120 lines
3.4 KiB
C
/* $NetBSD: i2c.c,v 1.5 2005/12/11 12:21:22 christos Exp $ */
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/*
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* Copyright (c) 2003 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/event.h>
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#include <sys/conf.h>
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#include <dev/i2c/i2cvar.h>
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#include "locators.h"
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struct iic_softc {
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struct device sc_dev;
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i2c_tag_t sc_tag;
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};
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int
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iicbus_print(void *aux, const char *pnp)
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{
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struct i2cbus_attach_args *iba = aux;
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if (pnp != NULL)
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aprint_normal("%s at %s", iba->iba_name, pnp);
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return (UNCONF);
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}
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static int
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iic_print(void *aux, const char *pnp)
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{
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struct i2c_attach_args *ia = aux;
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aprint_normal(" addr 0x%x", ia->ia_addr);
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return (UNCONF);
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}
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static int
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iic_search(struct device *parent, struct cfdata *cf,
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const int *ldesc, void *aux)
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{
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struct iic_softc *sc = (void *) parent;
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struct i2c_attach_args ia;
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ia.ia_tag = sc->sc_tag;
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ia.ia_addr = cf->cf_loc[IICCF_ADDR];
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ia.ia_size = cf->cf_loc[IICCF_SIZE];
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if (config_match(parent, cf, &ia) > 0)
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config_attach(parent, cf, &ia, iic_print);
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return (0);
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}
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static int
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iic_match(struct device *parent, struct cfdata *cf, void *aux)
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{
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struct i2cbus_attach_args *iba = aux;
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/* Just make sure we're looking for i2c. */
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return (strcmp(iba->iba_name, cf->cf_name) == 0);
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}
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static void
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iic_attach(struct device *parent, struct device *self, void *aux)
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{
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struct iic_softc *sc = (void *) self;
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struct i2cbus_attach_args *iba = aux;
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aprint_naive(": I2C bus\n");
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aprint_normal(": I2C bus\n");
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sc->sc_tag = iba->iba_tag;
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/*
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* Attach all i2c devices described in the kernel
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* configuration file.
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*/
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config_search_ia(iic_search, self, "iic", NULL);
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}
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CFATTACH_DECL(iic, sizeof(struct iic_softc),
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iic_match, iic_attach, NULL, NULL);
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