120 lines
3.4 KiB
C
120 lines
3.4 KiB
C
/* $NetBSD: i2c.c,v 1.3 2004/09/13 12:55:47 drochner 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,
|
|
const locdesc_t *ldesc, 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_ia(iic_search, self, "iic", NULL);
|
|
}
|
|
|
|
CFATTACH_DECL(iic, sizeof(struct iic_softc),
|
|
iic_match, iic_attach, NULL, NULL);
|