NetBSD/sys/dev/i2c/i2c.c

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/* $NetBSD: i2c.c,v 1.2 2004/05/16 11:42:28 wiz Exp $ */
/*
* Copyright (c) 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/event.h>
#include <sys/conf.h>
#include <dev/i2c/i2cvar.h>
#include "locators.h"
struct iic_softc {
struct device sc_dev;
i2c_tag_t sc_tag;
};
int
iicbus_print(void *aux, const char *pnp)
{
struct i2cbus_attach_args *iba = aux;
if (pnp != NULL)
aprint_normal("%s at %s", iba->iba_name, pnp);
return (UNCONF);
}
static int
iic_print(void *aux, const char *pnp)
{
struct i2c_attach_args *ia = aux;
aprint_normal(" addr 0x%x", ia->ia_addr);
return (UNCONF);
}
static int
iic_search(struct device *parent, struct cfdata *cf, void *aux)
{
struct iic_softc *sc = (void *) parent;
struct i2c_attach_args ia;
ia.ia_tag = sc->sc_tag;
ia.ia_addr = cf->cf_loc[IICCF_ADDR];
ia.ia_size = cf->cf_loc[IICCF_SIZE];
if (config_match(parent, cf, &ia) > 0)
config_attach(parent, cf, &ia, iic_print);
return (0);
}
static int
iic_match(struct device *parent, struct cfdata *cf, void *aux)
{
struct i2cbus_attach_args *iba = aux;
/* Just make sure we're looking for i2c. */
return (strcmp(iba->iba_name, cf->cf_name) == 0);
}
static void
iic_attach(struct device *parent, struct device *self, void *aux)
{
struct iic_softc *sc = (void *) self;
struct i2cbus_attach_args *iba = aux;
aprint_naive(": I2C bus\n");
aprint_normal(": I2C bus\n");
sc->sc_tag = iba->iba_tag;
/*
* Attach all i2c devices described in the kernel
* configuration file.
*/
config_search(iic_search, self, NULL);
}
CFATTACH_DECL(iic, sizeof(struct iic_softc),
iic_match, iic_attach, NULL, NULL);