/*      $NetBSD: pq3cfi.c,v 1.8 2023/05/10 00:08:07 riastradh Exp $     */
/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Cliff Neighbors.
*
* 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.
*/

/*
* NOR CFI driver support for booke
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pq3cfi.c,v 1.8 2023/05/10 00:08:07 riastradh Exp $");

#include "locators.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/cdefs.h>
#include <sys/device.h>
#include <sys/endian.h>

#include <sys/bus.h>

#include <powerpc/booke/cpuvar.h>

#include <dev/nor/nor.h>
#include <dev/nor/cfi.h>


static int  pq3cfi_match(device_t, cfdata_t, void *);
static void pq3cfi_attach(device_t, device_t, void *);
static int  pq3cfi_detach(device_t, int);

struct pq3cfi_softc {
       device_t                sc_dev;
       device_t                sc_nordev;
       struct cfi                      sc_cfi;
       bus_addr_t              sc_addr;
       bus_size_t              sc_size;
       struct nor_interface    sc_nor_if;
};

CFATTACH_DECL_NEW(pq3cfi, sizeof(struct pq3cfi_softc), pq3cfi_match,
   pq3cfi_attach, pq3cfi_detach, NULL);

static int
pq3cfi_match(device_t parent, cfdata_t match, void *aux)
{
       struct generic_attach_args *ga = aux;
       bus_size_t tmpsize = CFI_QRY_MIN_MAP_SIZE;
       bus_addr_t addr;
       struct cfi cfi;
       int rv;

       KASSERT(ga->ga_bst != NULL);

       addr = ga->ga_addr;
       if (addr == OBIOCF_ADDR_DEFAULT) {
               aprint_error("%s: no base address\n", __func__);
               return 0;
       }

       cfi.cfi_bst = ga->ga_bst;
       int error = bus_space_map(cfi.cfi_bst, addr, tmpsize, 0, &cfi.cfi_bsh);
       if (error != 0) {
               aprint_error("%s: cannot map %d at offset %#x, error %d\n",                             __func__, tmpsize, addr, error);
               return false;
       }

       if (! cfi_probe(&cfi)) {
               aprint_debug("%s: probe addr %#x, CFI not found\n",
                       __func__, addr);
               rv = 0;
       } else {
               rv = 1;
       }

       bus_space_unmap(cfi.cfi_bst, cfi.cfi_bsh, tmpsize);

       return rv;
}

static void
pq3cfi_attach(device_t parent, device_t self, void *aux)
{
       struct pq3cfi_softc *sc = device_private(self);
       struct generic_attach_args *ga = aux;
       struct cfi_query_data * const qryp = &sc->sc_cfi.cfi_qry_data;
       const bus_size_t tmpsize = CFI_QRY_MIN_MAP_SIZE;
       bool found;
       int error;

       aprint_normal("\n");

       sc->sc_dev = self;
       sc->sc_cfi.cfi_bst = ga->ga_bst;
       sc->sc_addr = ga->ga_addr;

       /* map enough to identify, remap later when size is known */
       error = bus_space_map(sc->sc_cfi.cfi_bst, sc->sc_addr, tmpsize,
               0, &sc->sc_cfi.cfi_bsh);
       if (error != 0) {
               aprint_error_dev(self, "could not map error %d\n", error);
               return;
       }

       found = cfi_identify(&sc->sc_cfi);

       bus_space_unmap(sc->sc_cfi.cfi_bst, sc->sc_cfi.cfi_bsh, tmpsize);

       if (! found) {
               /* should not happen, we already probed OK in match */
               aprint_error_dev(self, "could not map error %d\n", error);
               return;
       }

       sc->sc_size = 1 << qryp->device_size;

       sc->sc_nor_if = nor_interface_cfi;
       sc->sc_nor_if.private = &sc->sc_cfi;
       sc->sc_nor_if.access_width = (1 << sc->sc_cfi.cfi_portwidth);

       cfi_print(self, &sc->sc_cfi);

       error = bus_space_map(sc->sc_cfi.cfi_bst, sc->sc_addr, sc->sc_size,
               BUS_SPACE_MAP_PREFETCHABLE, &sc->sc_cfi.cfi_bsh);
       if (error != 0) {
               aprint_error_dev(self, "could not map error %d\n", error);
               return;
       }

       if (! pmf_device_register1(self, NULL, NULL, NULL))
               aprint_error_dev(self, "couldn't establish power handler\n");

       sc->sc_nordev = nor_attach_mi(&sc->sc_nor_if, self);

}

static int
pq3cfi_detach(device_t self, int flags)
{
       struct pq3cfi_softc *sc = device_private(self);
       int error;

       error = config_detach_children(self, flags);
       if (error)
               return error;

       pmf_device_deregister(self);

       bus_space_unmap(sc->sc_cfi.cfi_bst, sc->sc_cfi.cfi_bsh, sc->sc_size);

       return 0;
}

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