/* $NetBSD: plb.c,v 1.25 2023/12/20 15:29:06 thorpej Exp $ */

/*
* Copyright 2001 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Eduardo Horvath and Simon Burge for Wasabi Systems, 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. 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
*      Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
*    or promote products derived from this software without specific prior
*    written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, 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 WASABI SYSTEMS, 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.
*/

/*
* Copyright (c) 1996 Christopher G. Demetriou.  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 by Christopher G. Demetriou
*      for the NetBSD Project.
* 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.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: plb.c,v 1.25 2023/12/20 15:29:06 thorpej Exp $");

#include "emac.h"
#include "locators.h"

#define _POWERPC_BUS_DMA_PRIVATE

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

#include <powerpc/ibm4xx/cpu.h>
#include <powerpc/ibm4xx/spr.h>
#include <powerpc/ibm4xx/dev/malvar.h>
#include <powerpc/ibm4xx/dev/plbvar.h>

/*
* The devices that attach to the processor local bus on the 405GP CPU.
*/
const struct plb_dev plb_devs [] = {
       /* IBM 405GP */
       { IBM405GP,     "cpu", },
       { IBM405GP,     "ecc", },
       { IBM405GP,     "opb", },
       { IBM405GP,     "pchb", },

       /* IBM 405GPr */
       { IBM405GPR,    "cpu", },
       { IBM405GPR,    "ecc", },
       { IBM405GPR,    "opb", },
       { IBM405GPR,    "pchb", },
       { IBM405GPR,    "exb", },

       /* AMCC 405EX / EXR */
       { AMCC405EX,    "cpu", },
       { AMCC405EX,    "ecc", },
       { AMCC405EX,    "opb", },
       { AMCC405EX,    "dwctwo", },

       { 0,            NULL }
};

static int      plb_match(device_t, cfdata_t, void *);
static void     plb_attach(device_t, device_t, void *);
static int      plb_print(void *, const char *);

CFATTACH_DECL_NEW(plb, 0, plb_match, plb_attach, NULL, NULL);

/*
* "generic" DMA struct, nothing special.
*/
struct powerpc_bus_dma_tag ibm4xx_default_bus_dma_tag = {
       0,                      /* _bounce_thresh */
       _bus_dmamap_create,
       _bus_dmamap_destroy,
       _bus_dmamap_load,
       _bus_dmamap_load_mbuf,
       _bus_dmamap_load_uio,
       _bus_dmamap_load_raw,
       _bus_dmamap_unload,
       _bus_dmamap_sync,
       _bus_dmamem_alloc,
       _bus_dmamem_free,
       _bus_dmamem_map,
       _bus_dmamem_unmap,
       _bus_dmamem_mmap,
       _bus_dma_phys_to_bus_mem_generic,
       _bus_dma_bus_mem_to_phys_generic,
};

/*
* Probe for the plb; always succeeds.
*/
static int
plb_match(device_t parent, cfdata_t cf, void *aux)
{

       return 1;
}

/*
* Attach the processor local bus.
*/
static void
plb_attach(device_t parent, device_t self, void *aux)
{
       struct plb_attach_args paa;
       struct plb_dev *local_plb_devs = aux;
       int pvr, i;

       aprint_naive("\n");
       aprint_normal("\n");

       pvr = mfpvr() >> 16;

#if NEMAC > 0
       mal_attach(pvr);
#endif

       for (i = 0; plb_devs[i].plb_name != NULL; i++) {
               if (plb_devs[i].plb_pvr != pvr)
                       continue;

               paa.plb_name = plb_devs[i].plb_name;
               paa.plb_addr = PLBCF_ADDR_DEFAULT;
               paa.plb_dmat = &ibm4xx_default_bus_dma_tag;
               paa.plb_irq = PLBCF_IRQ_DEFAULT;

               config_found(self, &paa, plb_print, CFARGS_NONE);
       }

       while (local_plb_devs && local_plb_devs->plb_name != NULL) {
               if (local_plb_devs->plb_pvr != pvr)
                       continue;

               paa.plb_name = local_plb_devs->plb_name;
               paa.plb_addr = PLBCF_ADDR_DEFAULT;
               paa.plb_dmat = &ibm4xx_default_bus_dma_tag;
               paa.plb_irq = PLBCF_IRQ_DEFAULT;

               config_found(self, &paa, plb_print, CFARGS_NONE);
               local_plb_devs++;
       }
}

static int
plb_print(void *aux, const char *pnp)
{
       struct plb_attach_args *paa = aux;

       if (pnp)
               aprint_normal("%s at %s", paa->plb_name, pnp);
       if (paa->plb_addr != PLBCF_ADDR_DEFAULT)
               aprint_normal(" address 0x%08x", paa->plb_addr);
       if (paa->plb_irq != PLBCF_IRQ_DEFAULT)
               aprint_normal(" irq %d", paa->plb_irq);

       return UNCONF;
}

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