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gttwsi.c revision 1.6.2.2 
      1 /*	$NetBSD: gttwsi.c,v 1.6.2.2 2014/08/20 00:03:39 tls Exp $	*/
      2 /*
      3  * Copyright (c) 2008 Eiji Kawauchi.
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *      This product includes software developed for the NetBSD Project by
     17  *      Eiji Kawauchi.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 /*
     33  * Copyright (c) 2005 Brocade Communcations, inc.
     34  * All rights reserved.
     35  *
     36  * Written by Matt Thomas for Brocade Communcations, Inc.
     37  *
     38  * Redistribution and use in source and binary forms, with or without
     39  * modification, are permitted provided that the following conditions
     40  * are met:
     41  * 1. Redistributions of source code must retain the above copyright
     42  *    notice, this list of conditions and the following disclaimer.
     43  * 2. Redistributions in binary form must reproduce the above copyright
     44  *    notice, this list of conditions and the following disclaimer in the
     45  *    documentation and/or other materials provided with the distribution.
     46  * 3. The name of Brocade Communications, Inc. may not be used to endorse
     47  *    or promote products derived from this software without specific prior
     48  *    written permission.
     49  *
     50  * THIS SOFTWARE IS PROVIDED BY BROCADE COMMUNICATIONS, INC. ``AS IS'' AND
     51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     53  * ARE DISCLAIMED.  IN NO EVENT SHALL EITHER BROCADE COMMUNICATIONS, INC. BE
     54  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     55  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     56  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     57  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     58  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     59  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
     60  * OF THE POSSIBILITY OF SUCH DAMAGE.
     61  */
     62 //#define TWSI_DEBUG
     63 
     64 /*
     65  * Marvell Two-Wire Serial Interface (aka I2C) master driver
     66  */
     67 
     68 #include <sys/cdefs.h>
     69 __KERNEL_RCSID(0, "$NetBSD: gttwsi.c,v 1.6.2.2 2014/08/20 00:03:39 tls Exp $");
     70 #include "locators.h"
     71 
     72 #include <sys/param.h>
     73 #include <sys/bus.h>
     74 #include <sys/condvar.h>
     75 #include <sys/device.h>
     76 #include <sys/errno.h>
     77 #include <sys/kernel.h>
     78 #include <sys/mutex.h>
     79 #include <sys/systm.h>
     80 
     81 #include <machine/cpu.h>
     82 #include <machine/param.h>
     83 
     84 #include <dev/i2c/i2cvar.h>
     85 #include <dev/i2c/gttwsireg.h>
     86 #include <dev/i2c/gttwsivar.h>
     87 
     88 #include <dev/marvell/marvellvar.h>
     89 
     90 static int	gttwsi_match(device_t, cfdata_t, void *);
     91 static void	gttwsi_attach(device_t, device_t, void *);
     92 
     93 CFATTACH_DECL_NEW(gttwsi_gt, sizeof(struct gttwsi_softc),
     94     gttwsi_match, gttwsi_attach, NULL, NULL);
     95 CFATTACH_DECL_NEW(gttwsi_mbus, sizeof(struct gttwsi_softc),
     96     gttwsi_match, gttwsi_attach, NULL, NULL);
     97 
     98 /* ARGSUSED */
     99 static int
    100 gttwsi_match(device_t parent, cfdata_t match, void *aux)
    101 {
    102 	struct marvell_attach_args *mva = aux;
    103 
    104 	if (strcmp(mva->mva_name, match->cf_name) != 0)
    105 		return 0;
    106 	if (mva->mva_offset == MVA_OFFSET_DEFAULT ||
    107 	    mva->mva_irq == MVA_IRQ_DEFAULT)
    108 		return 0;
    109 
    110 	mva->mva_size = GTTWSI_SIZE;
    111 	return 1;
    112 }
    113 
    114 /* ARGSUSED */
    115 static void
    116 gttwsi_attach(device_t parent, device_t self, void *args)
    117 {
    118 	struct marvell_attach_args *mva = args;
    119 	bus_space_handle_t ioh;
    120 
    121 	if (bus_space_subregion(mva->mva_iot, mva->mva_ioh, mva->mva_offset,
    122 	    mva->mva_size, &ioh)) {
    123 		aprint_error(": cannot map registers\n");
    124 		return;
    125 	}
    126 
    127 	gttwsi_attach_subr(self, mva->mva_iot, ioh);
    128 
    129 	marvell_intr_establish(mva->mva_irq, IPL_BIO, gttwsi_intr,
    130 	    device_private(self));
    131 
    132 	gttwsi_config_children(self);
    133 }
    134