/*      $NetBSD: ziic.c,v 1.6 2021/08/07 16:19:08 thorpej Exp $ */

/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by NONAKA Kimihiro.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ziic.c,v 1.6 2021/08/07 16:19:08 thorpej Exp $");

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

#include <dev/i2c/i2cvar.h>

#include <arm/xscale/pxa2x0reg.h>
#include <arm/xscale/pxa2x0var.h>
#include <arm/xscale/pxa2x0_i2c.h>

#ifdef PXAIIC_DEBUG
#define DPRINTF(s)      printf s
#else
#define DPRINTF(s)      do { } while (/*CONSTCOND*/0)
#endif

struct pxaiic_softc {
       struct pxa2x0_i2c_softc sc_pxa_i2c;
       void *                  sc_ih;

       struct i2c_controller   sc_i2c;
};

static int pxaiic_match(device_t, cfdata_t, void *);
static void pxaiic_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(pxaiic, sizeof(struct pxaiic_softc),
   pxaiic_match, pxaiic_attach, NULL, NULL);

static int pxaiic_acquire_bus(void *, int);
static void pxaiic_release_bus(void *, int);
static int pxaiic_send_start(void *, int);
static int pxaiic_send_stop(void *, int);
static int pxaiic_initiate_xfer(void *, uint16_t, int);
static int pxaiic_read_byte(void *, uint8_t *, int);
static int pxaiic_write_byte(void *, uint8_t, int);

static int
pxaiic_match(device_t parent, cfdata_t cf, void *aux)
{
       struct pxaip_attach_args *pxa = aux;

       if (strcmp(cf->cf_name, pxa->pxa_name))
               return 0;

       pxa->pxa_addr = PXA2X0_I2C_BASE;
       pxa->pxa_size = PXA2X0_I2C_SIZE;
       return 1;
}

static void
pxaiic_attach(device_t parent, device_t self, void *aux)
{
       struct pxaiic_softc *sc = device_private(self);
       struct pxa2x0_i2c_softc *psc = &sc->sc_pxa_i2c;
       struct pxaip_attach_args *pxa = aux;
       struct i2cbus_attach_args iba;

       aprint_normal(": I2C controller\n");
       aprint_naive("\n");

       psc->sc_dev = self;
       psc->sc_iot = pxa->pxa_iot;
       psc->sc_addr = pxa->pxa_addr;
       psc->sc_size = pxa->pxa_size;
       psc->sc_flags = 0;
       if (pxa2x0_i2c_attach_sub(psc)) {
               aprint_error_dev(self, "unable to attach PXA I2C controller\n");
               return;
       }

#if 0
       mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_TTY);

       sc->sc_ih = pxa2x0_intr_establish(PXA2X0_INT_I2C, IPL_TTY,
           pxa2x0_i2c_intr, &psc);
       if (sc->sc_ih == NULL) {
               aprint_error_dev(self, "unable to establish intr\n");
               return; /* XXX: mutex_destroy, bus_space_unmap */
       }
#endif

       /* Initialize i2c_controller */
       iic_tag_init(&sc->sc_i2c);
       sc->sc_i2c.ic_cookie = sc;
       sc->sc_i2c.ic_acquire_bus = pxaiic_acquire_bus;
       sc->sc_i2c.ic_release_bus = pxaiic_release_bus;
       sc->sc_i2c.ic_send_start = pxaiic_send_start;
       sc->sc_i2c.ic_send_stop = pxaiic_send_stop;
       sc->sc_i2c.ic_initiate_xfer = pxaiic_initiate_xfer;
       sc->sc_i2c.ic_read_byte = pxaiic_read_byte;
       sc->sc_i2c.ic_write_byte = pxaiic_write_byte;

       memset(&iba, 0, sizeof(iba));
       iba.iba_tag = &sc->sc_i2c;
       config_found(psc->sc_dev, &iba, iicbus_print, CFARGS_NONE);
}

static int
pxaiic_acquire_bus(void *cookie, int flags)
{
       struct pxaiic_softc *sc = cookie;
       struct pxa2x0_i2c_softc *psc = &sc->sc_pxa_i2c;

       pxa2x0_i2c_open(psc);

       return 0;
}

static void
pxaiic_release_bus(void *cookie, int flags)
{
       struct pxaiic_softc *sc = cookie;
       struct pxa2x0_i2c_softc *psc = &sc->sc_pxa_i2c;

       pxa2x0_i2c_close(psc);
}

static int
pxaiic_send_start(void *cookie, int flags)
{
       struct pxaiic_softc *sc = cookie;
       struct pxa2x0_i2c_softc *psc = &sc->sc_pxa_i2c;

       return pxa2x0_i2c_send_start(psc, flags);
}

static int
pxaiic_send_stop(void *cookie, int flags)
{
       struct pxaiic_softc *sc = cookie;
       struct pxa2x0_i2c_softc *psc = &sc->sc_pxa_i2c;

       return pxa2x0_i2c_send_stop(psc, flags);
}

static int
pxaiic_initiate_xfer(void *cookie, uint16_t addr, int flags)
{
       struct pxaiic_softc *sc = cookie;
       struct pxa2x0_i2c_softc *psc = &sc->sc_pxa_i2c;

       return pxa2x0_i2c_initiate_xfer(psc, addr, flags);
}

static int
pxaiic_read_byte(void *cookie, uint8_t *bytep, int flags)
{
       struct pxaiic_softc *sc = cookie;
       struct pxa2x0_i2c_softc *psc = &sc->sc_pxa_i2c;

       return pxa2x0_i2c_read_byte(psc, bytep, flags);
}

static int
pxaiic_write_byte(void *cookie, uint8_t byte, int flags)
{
       struct pxaiic_softc *sc = cookie;
       struct pxa2x0_i2c_softc *psc = &sc->sc_pxa_i2c;

       return pxa2x0_i2c_write_byte(psc, byte, flags);
}

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