/*      $NetBSD: gttwsi.c,v 1.12 2020/01/12 17:48:42 thorpej Exp $      */
/*
* Copyright (c) 2008 Eiji Kawauchi.
* All rights reserved.
*
* 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
*      Eiji Kawauchi.
* 4. The name of the author may not be used to endorse or promote products
*    derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
*/
/*
* Copyright (c) 2005 Brocade Communcations, inc.
* All rights reserved.
*
* Written by Matt Thomas for Brocade Communcations, 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. The name of Brocade Communications, Inc. may not be used to endorse
*    or promote products derived from this software without specific prior
*    written permission.
*
* THIS SOFTWARE IS PROVIDED BY BROCADE COMMUNICATIONS, 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 EITHER BROCADE COMMUNICATIONS, 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.
*/
//#define TWSI_DEBUG

/*
* Marvell Two-Wire Serial Interface (aka I2C) master driver
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: gttwsi.c,v 1.12 2020/01/12 17:48:42 thorpej Exp $");
#include "locators.h"

#include <sys/param.h>
#include <sys/bus.h>
#include <sys/condvar.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/kernel.h>
#include <sys/mutex.h>
#include <sys/systm.h>

#include <machine/cpu.h>
#include <machine/param.h>

#include <dev/i2c/i2cvar.h>
#include <dev/i2c/gttwsireg.h>
#include <dev/i2c/gttwsivar.h>

#include <dev/marvell/marvellvar.h>

static const bus_size_t marvell_twsi_regmap[GTTWSI_NREGS] = {
       [TWSI_SLAVEADDR]        = TWSI_MARVELL_SLAVEADDR,
       [TWSI_EXTEND_SLAVEADDR] = TWSI_MARVELL_EXTEND_SLAVEADDR,
       [TWSI_DATA]             = TWSI_MARVELL_DATA,
       [TWSI_CONTROL]          = TWSI_MARVELL_CONTROL,
       [TWSI_STATUS]           = TWSI_MARVELL_STATUS,
       [TWSI_BAUDRATE]         = TWSI_MARVELL_BAUDRATE,
       [TWSI_SOFTRESET]        = TWSI_MARVELL_SOFTRESET,
};

static int      gttwsi_match(device_t, cfdata_t, void *);
static void     gttwsi_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(gttwsi_gt, sizeof(struct gttwsi_softc),
   gttwsi_match, gttwsi_attach, NULL, NULL);
CFATTACH_DECL_NEW(gttwsi_mbus, sizeof(struct gttwsi_softc),
   gttwsi_match, gttwsi_attach, NULL, NULL);

/* ARGSUSED */
static int
gttwsi_match(device_t parent, cfdata_t match, void *aux)
{
       struct marvell_attach_args *mva = aux;

       if (strcmp(mva->mva_name, match->cf_name) != 0)
               return 0;
       if (mva->mva_offset == MVA_OFFSET_DEFAULT ||
           mva->mva_irq == MVA_IRQ_DEFAULT)
               return 0;

       mva->mva_size = GTTWSI_SIZE;
       return 1;
}

/* ARGSUSED */
static void
gttwsi_attach(device_t parent, device_t self, void *args)
{
       struct marvell_attach_args *mva = args;
       bus_space_handle_t ioh;

       if (bus_space_subregion(mva->mva_iot, mva->mva_ioh, mva->mva_offset,
           mva->mva_size, &ioh)) {
               aprint_error(": cannot map registers\n");
               return;
       }

       gttwsi_attach_subr(self, mva->mva_iot, ioh, marvell_twsi_regmap);

       marvell_intr_establish(mva->mva_irq, IPL_BIO, gttwsi_intr,
           device_private(self));

       gttwsi_config_children(self);
}