/*      $NetBSD: pq3sdhc.c,v 1.6 2015/02/27 16:09:05 nonaka Exp $       */
/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Matt Thomas of 3am Software Foundry.
*
* 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.
*/

#define ESDHC_PRIVATE

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pq3sdhc.c,v 1.6 2015/02/27 16:09:05 nonaka Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/queue.h>

#include <sys/bus.h>

#include <powerpc/booke/cpuvar.h>
#include <powerpc/booke/e500var.h>
#include <powerpc/booke/e500reg.h>

#include <dev/sdmmc/sdhcreg.h>
#include <dev/sdmmc/sdhcvar.h>

#define EDSHC_HOST_CTL_RES      0x05

static int pq3sdhc_match(device_t, cfdata_t, void *);
static void pq3sdhc_attach(device_t, device_t, void *);

struct pq3sdhc_softc {
       struct sdhc_softc       sc;
       bus_space_tag_t         sc_bst;
       bus_space_handle_t      sc_bsh;
       struct sdhc_host        *sc_hosts[1];
       void                    *sc_ih;         /* interrupt vectoring */
};

CFATTACH_DECL_NEW(pq3sdhc, sizeof(struct pq3sdhc_softc),
   pq3sdhc_match, pq3sdhc_attach, NULL, NULL);

static int
pq3sdhc_match(device_t parent, cfdata_t cf, void *aux)
{

       if (!e500_cpunode_submatch(parent, cf, cf->cf_name, aux))
               return 0;

       return 1;
}

static void
pq3sdhc_attach(device_t parent, device_t self, void *aux)
{
       struct cpunode_softc * const psc = device_private(parent);
       struct pq3sdhc_softc * const sc = device_private(self);
       struct cpunode_attach_args * const cna = aux;
       struct cpunode_locators * const cnl = &cna->cna_locs;
       int error;

       psc->sc_children |= cna->cna_childmask;
       sc->sc.sc_dmat = cna->cna_dmat;
       sc->sc.sc_dev = self;
       sc->sc.sc_flags |= SDHC_FLAG_USE_DMA;
       sc->sc.sc_flags |=
           SDHC_FLAG_HAVE_DVS | SDHC_FLAG_32BIT_ACCESS | SDHC_FLAG_ENHANCED;
       sc->sc.sc_host = sc->sc_hosts;
       sc->sc.sc_clkbase = board_info_get_number("bus-frequency") / 2000;
       sc->sc_bst = cna->cna_memt;

       error = bus_space_map(sc->sc_bst, cnl->cnl_addr, cnl->cnl_size, 0,
           &sc->sc_bsh);
       if (error) {
               aprint_error_dev(self,
                   "can't map registers for %s: %d\n", cnl->cnl_name, error);
               return;
       }

       /*
        * If using DMA, enable SNOOPing.
        */
       if (sc->sc.sc_flags & SDHC_FLAG_USE_DMA) {
               uint32_t dcr = bus_space_read_4(sc->sc_bst, sc->sc_bsh, DCR);
               dcr |= DCR_SNOOP | DCR_RD_SAFE | DCR_RD_PFE;
               bus_space_write_4(sc->sc_bst, sc->sc_bsh, DCR, dcr);
       }

       aprint_naive(": SDHC controller\n");
       aprint_normal(": SDHC controller%s\n",
          (sc->sc.sc_flags & SDHC_FLAG_USE_DMA) ? " (DMA enabled)" : "");

       sc->sc_ih = intr_establish(cnl->cnl_intrs[0], IPL_VM, IST_ONCHIP,
           sdhc_intr, &sc->sc);
       if (sc->sc_ih == NULL) {
               aprint_error_dev(self, "failed to establish interrupt %d\n",
                    cnl->cnl_intrs[0]);
               goto fail;
       }
       aprint_normal_dev(self, "interrupting on irq %d\n",
            cnl->cnl_intrs[0]);

       error = sdhc_host_found(&sc->sc, sc->sc_bst, sc->sc_bsh,
           cnl->cnl_size);
       if (error != 0) {
               aprint_error_dev(self, "couldn't initialize host, error=%d\n",
                   error);
               goto fail;
       }
       return;

fail:
       if (sc->sc_ih) {
               intr_disestablish(sc->sc_ih);
               sc->sc_ih = NULL;
       }
       bus_space_unmap(sc->sc_bst, sc->sc_bsh, cnl->cnl_size);
}