diff options
Diffstat (limited to 'sys/dev/i2c/i2c.c')
| -rw-r--r-- | sys/dev/i2c/i2c.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/sys/dev/i2c/i2c.c b/sys/dev/i2c/i2c.c new file mode 100644 index 00000000000..8cfd6c8cbba --- /dev/null +++ b/sys/dev/i2c/i2c.c @@ -0,0 +1,133 @@ +/* $OpenBSD: i2c.c,v 1.1 2004/05/23 17:33:43 grange Exp $ */ +/* $NetBSD: i2c.c,v 1.1 2003/09/30 00:35:31 thorpej 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> + +#define IICCF_ADDR 0 +#define IICCF_SIZE 1 + +struct iic_softc { + struct device sc_dev; + i2c_tag_t sc_tag; +}; + +int iic_match(struct device *, void *, void *); +void iic_attach(struct device *, struct device *, void *); +int iic_search(struct device *, void *, void *); +int iic_print(void *, const char *); + +struct cfattach iic_ca = { + sizeof (struct iic_softc), + iic_match, + iic_attach +}; + +struct cfdriver iic_cd = { + NULL, "iic", DV_DULL +}; + +int +iicbus_print(void *aux, const char *pnp) +{ + struct i2cbus_attach_args *iba = aux; + + if (pnp != NULL) + printf("%s at %s", iba->iba_name, pnp); + + return (UNCONF); +} + +int +iic_print(void *aux, const char *pnp) +{ + struct i2c_attach_args *ia = aux; + + printf(" addr 0x%x", ia->ia_addr); + + return (UNCONF); +} + +int +iic_search(struct device *parent, void *arg, void *aux) +{ + struct iic_softc *sc = (void *) parent; + struct cfdata *cf = arg; + 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 (cf->cf_attach->ca_match(parent, cf, &ia) > 0) + config_attach(parent, cf, &ia, iic_print); + + return (0); +} + +int +iic_match(struct device *parent, void *arg, void *aux) +{ + struct cfdata *cf = arg; + struct i2cbus_attach_args *iba = aux; + + /* Just make sure we're looking for i2c. */ + return (strcmp(iba->iba_name, cf->cf_driver->cd_name) == 0); +} + +void +iic_attach(struct device *parent, struct device *self, void *aux) +{ + struct iic_softc *sc = (void *) self; + struct i2cbus_attach_args *iba = aux; + + sc->sc_tag = iba->iba_tag; + + printf("\n"); + + /* + * Attach all i2c devices described in the kernel + * configuration file. + */ + config_search(iic_search, self, NULL); +} |