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      1 /*-
      2  * Copyright (c) 2012 The NetBSD Foundation, Inc.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to The NetBSD Foundation
      6  * by Matt Thomas of 3am Software Foundry.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     20  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     21  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     27  * POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #include "locators.h"
     31 
     32 #include <sys/cdefs.h>
     33 
     34 __KERNEL_RCSID(1, "$NetBSD: bcm53xx_i2c.c,v 1.2 2014/02/19 22:21:16 matt Exp $");
     35 
     36 #include <sys/param.h>
     37 #include <sys/bus.h>
     38 #include <sys/device.h>
     39 #include <sys/intr.h>
     40 #include <sys/systm.h>
     41 
     42 #include <arm/broadcom/bcm53xx_reg.h>
     43 #include <arm/broadcom/bcm53xx_var.h>
     44 
     45 static int bcmi2c_ccb_match(device_t, cfdata_t, void *);
     46 static void bcmi2c_ccb_attach(device_t, device_t, void *);
     47 
     48 struct bcmi2c_softc {
     49 	device_t sc_dev;
     50 	bus_space_tag_t sc_bst;
     51 	bus_space_handle_t sc_bsh;
     52 	bus_dma_tag_t sc_dmat;
     53 };
     54 
     55 CFATTACH_DECL_NEW(bcmi2c_ccb, sizeof(struct bcmi2c_softc),
     56 	bcmi2c_ccb_match, bcmi2c_ccb_attach, NULL, NULL);
     57 
     58 static int
     59 bcmi2c_ccb_match(device_t parent, cfdata_t cf, void *aux)
     60 {
     61 	struct bcmccb_attach_args * const ccbaa = aux;
     62 	const struct bcm_locators * const loc = &ccbaa->ccbaa_loc;
     63 
     64 	if (strcmp(cf->cf_name, loc->loc_name))
     65 		return 0;
     66 
     67 	KASSERT(cf->cf_loc[BCMCCBCF_PORT] == BCMCCBCF_PORT_DEFAULT);
     68 
     69 	return 1;
     70 }
     71 
     72 static void
     73 bcmi2c_ccb_attach(device_t parent, device_t self, void *aux)
     74 {
     75 	struct bcmi2c_softc * const sc = device_private(self);
     76 	struct bcmccb_attach_args * const ccbaa = aux;
     77 	const struct bcm_locators * const loc = &ccbaa->ccbaa_loc;
     78 
     79 	sc->sc_dev = self;
     80 
     81 	sc->sc_bst = ccbaa->ccbaa_ccb_bst;
     82 	sc->sc_dmat = ccbaa->ccbaa_dmat;
     83 	bus_space_subregion(sc->sc_bst, ccbaa->ccbaa_ccb_bsh,
     84 	    loc->loc_offset, loc->loc_size, &sc->sc_bsh);
     85 
     86 	aprint_naive("\n");
     87 	aprint_normal("\n");
     88 }
     89