/*      $Id: mpcsa_cf.c,v 1.3 2012/10/27 17:17:48 chs Exp $     */
/*      $NetBSD: mpcsa_cf.c,v 1.3 2012/10/27 17:17:48 chs Exp $ */

/*
* Copyright (c) 2007 Embedtronics Oy. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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: mpcsa_cf.c,v 1.3 2012/10/27 17:17:48 chs Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <arm/at91/at91reg.h>
#include <arm/at91/at91var.h>
#include <arm/at91/at91cfvar.h>
#include <arm/at91/at91piovar.h>

#ifdef MPCA_CF_DEBUG
int mpcsa_cf_debug = MPCA_CF_DEBUG;
#define DPRINTFN(n,x)   if (mpcsa_cf_debug>(n)) printf x;
#else
#define DPRINTFN(n,x)
#endif

struct at91_gpio_softc;

struct mpcsa_cf_softc {
       struct at91cf_softc     sc_dev;
       struct at91pio_softc    *sc_pioc;
};

static int mpcsa_cf_match(device_t, cfdata_t, void *);
static void mpcsa_cf_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(mpcsa_cf, sizeof(struct mpcsa_cf_softc),
             mpcsa_cf_match, mpcsa_cf_attach, NULL, NULL);

static int      mpcsa_cf_power_ctl(void *self, int onoff);
static int      mpcsa_cf_card_detect(void *self);
static int      mpcsa_cf_irq_line(void *self);
static void *   mpcsa_cf_intr_establish(void *self, int which, int ipl, int (*ih_func)(void *), void *arg);
static void     mpcsa_cf_intr_disestablish(void *self, int which, void *cookie);

struct at91cf_chipset_tag mpcsa_cf_tag = {
       mpcsa_cf_power_ctl,
       mpcsa_cf_card_detect,
       mpcsa_cf_irq_line,
       mpcsa_cf_intr_establish,
       mpcsa_cf_intr_disestablish
};

static int
mpcsa_cf_match(device_t parent, cfdata_t match, void *aux)
{
       if (strcmp(match->cf_name, "at91cf") == 0 && strcmp(match->cf_atname, "mpcsa_cf") == 0)
               return 2;
       return 0;
}

static void
mpcsa_cf_attach(device_t parent, device_t self, void *aux)
{
       struct mpcsa_cf_softc *sc = device_private(self);
//      at91cf_chipset_tag_t cscf = sc->sc_dev.sc_cscf;
       struct at91pio_softc *pioc;

       if ((pioc = at91pio_sc(AT91_PIOC)) == NULL) {
               printf("no PIOC!\n");
               return;
       }

       // configure PIO!
       sc->sc_pioc = pioc;
       at91pio_in(sc->sc_pioc, 3);     // CFIRQ
       at91pio_in(sc->sc_pioc, 4);     // CFCD
       at91pio_out(sc->sc_pioc, 5);    // CFRESET

       // and call common routine
       at91cf_attach_common(parent, self, aux, &mpcsa_cf_tag);
}

static int
mpcsa_cf_power_ctl(void *self, int onoff)
{
       struct mpcsa_cf_softc *sc = self;
       if (onoff) {
               at91pio_set(sc->sc_pioc, 5);
               return 20000;
       } else {
               at91pio_clear(sc->sc_pioc, 5);
               return 20000;
       }
}

static int      mpcsa_cf_card_detect(void *self)
{
       struct mpcsa_cf_softc *sc = self;
       return at91pio_read(sc->sc_pioc, 4) == 0;
}

static int      mpcsa_cf_irq_line(void *self)
{
       struct mpcsa_cf_softc *sc = self;
       return at91pio_read(sc->sc_pioc, 3);
}

static void *   mpcsa_cf_intr_establish(void *self, int which, int ipl, int (*ih_func)(void *), void *ih_arg)
{
       struct mpcsa_cf_softc *sc = self;
       return at91pio_intr_establish(sc->sc_pioc, which == CD_IRQ ? 4 : 3,
                                       ipl, ih_func, ih_arg);
}

static void     mpcsa_cf_intr_disestablish(void *self, int which, void *cookie)
{
       struct mpcsa_cf_softc *sc = self;
       at91pio_intr_disestablish(sc->sc_pioc, which == CD_IRQ ? 4 : 3, cookie);
}