/*      $NetBSD: mainbus.c,v 1.31 2023/12/20 06:36:01 thorpej Exp $     */

/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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: mainbus.c,v 1.31 2023/12/20 06:36:01 thorpej Exp $");

#include "opt_algor_p4032.h"
#include "opt_algor_p5064.h"
#include "opt_algor_p6032.h"

#include "opt_pci.h"

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

#include <algor/autoconf.h>

#include <mips/cache.h>

#include <dev/pci/pcivar.h>
#include <dev/pci/pciconf.h>

#if defined(PCI_NETBSD_CONFIGURE) && defined(PCI_NETBSD_ENABLE_IDE)
#if defined(ALGOR_P5064) || defined(ALGOR_P6032)
#include <dev/pci/pciide_piix_reg.h>
#endif /* ALGOR_P5064 || ALGOR_P6032 */
#endif /* PCI_NETBSD_CONFIGURE && PCI_NETBSD_ENABLE_IDE */

#include "locators.h"
#include "pci.h"

int     mainbus_match(device_t, cfdata_t, void *);
void    mainbus_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(mainbus, 0,
   mainbus_match, mainbus_attach, NULL, NULL);

int     mainbus_print(void *, const char *);
int     mainbus_submatch(device_t, cfdata_t,
                        const int *, void *);

/* There can be only one. */
int     mainbus_found;

struct mainbusdev {
       const char *md_name;
       bus_addr_t md_addr;
       int md_irq;
};

#if defined(ALGOR_P4032)
#include <algor/algor/algor_p4032reg.h>
#include <algor/algor/algor_p4032var.h>

struct mainbusdev mainbusdevs[] = {
       { "cpu",                -1,                     -1 },
       { "mcclock",            P4032_RTC,              P4032_IRQ_RTC },
       { "com",                P4032_COM1,             P4032_IRQ_COM1 },
       { "com",                P4032_COM2,             P4032_IRQ_COM2 },
       { "lpt",                P4032_LPT,              P4032_IRQ_LPT },
       { "pckbc",              P4032_PCKBC,            P4032_IRQ_PCKBC },
       { "fdc",                P4032_FDC,              P4032_IRQ_FLOPPY },
       { "vtpbc",              P4032_V962PBC,          -1 },

       { NULL,                 0,                      0 },
};

/* Reserve the bottom 64K of the I/O space for ISA devices. */
#define PCI_IO_START    0x00010000
#define PCI_IO_END      0x000effff
#define PCI_MEM_START   0x01000000
#define PCI_MEM_END     0x07ffffff
#define PCI_CHIPSET     &p4032_configuration.ac_pc
#endif /* ALGOR_P4032 */

#if defined(ALGOR_P5064)
#include <algor/algor/algor_p5064reg.h>
#include <algor/algor/algor_p5064var.h>

struct mainbusdev mainbusdevs[] = {
       { "cpu",                -1,                     -1 },
       { "vtpbc",              P5064_V360EPC,          -1 },

       { NULL,                 0,                      0 },
};

/*
* Reserve the bottom 512K of the I/O space for ISA devices.
* According to the PMON sources, this is a work-around for
* a bug in the ISA bridge.
*/
#define PCI_IO_START    0x00080000
#define PCI_IO_END      0x00ffffff
#define PCI_MEM_START   0x01000000
#define PCI_MEM_END     0x07ffffff
#define PCI_IDE_DEV     2
#define PCI_IDE_FUNC    1
#define PCI_CHIPSET     &p5064_configuration.ac_pc
#endif /* ALGOR_P5064 */

#if defined(ALGOR_P6032)
#include <algor/algor/algor_p6032reg.h>
#include <algor/algor/algor_p6032var.h>

struct mainbusdev mainbusdevs[] = {
       { "cpu",                -1,                     -1 },
       { "bonito",             BONITO_REG_BASE,        -1 },

       { NULL,                 0,                      0 },
};

/* Reserve the bottom 64K of the I/O space for ISA devices. */
#define PCI_IO_START    0x00010000
#define PCI_IO_END      0x000effff
#define PCI_MEM_START   0x01000000
#define PCI_MEM_END     0x0affffff
#define PCI_IDE_DEV     17
#define PCI_IDE_FUNC    1
#define PCI_CHIPSET     &p6032_configuration.ac_pc
#endif /* ALGOR_P6032 */

#define PCI_IO_SIZE     ((PCI_IO_END - PCI_IO_START) + 1)
#define PCI_MEM_SIZE    ((PCI_MEM_END - PCI_MEM_START) + 1)

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

       if (mainbus_found)
               return (0);

       return (1);
}

void
mainbus_attach(device_t parent, device_t self, void *aux)
{
       struct mainbus_attach_args ma;
       struct mainbusdev *md;
       bus_space_tag_t st;

       mainbus_found = 1;

       printf("\n");

#if NPCI > 0 && defined(PCI_NETBSD_CONFIGURE)
       struct pciconf_resources *pcires = pciconf_resource_init();

       pciconf_resource_add(pcires, PCICONF_RESOURCE_IO,
           PCI_IO_START, PCI_IO_SIZE);
       pciconf_resource_add(pcires, PCICONF_RESOURCE_MEM,
           PCI_MEM_START, PCI_MEM_SIZE);

       pci_configure_bus(PCI_CHIPSET, pcires, 0,
           mips_cache_info.mci_dcache_align);
       pciconf_resource_fini(pcires);

#if defined(PCI_NETBSD_ENABLE_IDE)
       /*
        * Perhaps PMON has not enabled the IDE controller.  Easy to
        * fix -- just set the ENABLE bits for each channel in the
        * IDETIM register.  Just clear all the bits for the channel
        * except for the ENABLE bits -- the `pciide' driver will
        * properly configure it later.
        */
       pcitag_t idetag = pci_make_tag(PCI_CHIPSET, 0, PCI_IDE_DEV,
           PCI_IDE_FUNC);
       pcireg_t idetim = 0;
       if (PCI_NETBSD_ENABLE_IDE & 0x01)
               idetim = PIIX_IDETIM_SET(idetim, PIIX_IDETIM_IDE, 0);
       if (PCI_NETBSD_ENABLE_IDE & 0x02)
               idetim = PIIX_IDETIM_SET(idetim, PIIX_IDETIM_IDE, 1);
       pci_conf_write(PCI_CHIPSET, idetag, PIIX_IDETIM, idetim);
#endif
#endif /* NPCI > 0 && defined(PCI_NETBSD_CONFIGURE) */

#if defined(ALGOR_P4032)
       st = &p4032_configuration.ac_lociot;
#elif defined(ALGOR_P5064)
       st = NULL;
#elif defined(ALGOR_P6032)
       st = NULL;
#endif

       for (md = mainbusdevs; md->md_name != NULL; md++) {
               ma.ma_name = md->md_name;
               ma.ma_st = st;
               ma.ma_addr = md->md_addr;
               ma.ma_irq = md->md_irq;
               config_found(self, &ma, mainbus_print,
                   CFARGS(.submatch = mainbus_submatch));
       }
}

int
mainbus_print(void *aux, const char *pnp)
{
       struct mainbus_attach_args *ma = aux;

       if (pnp)
               aprint_normal("%s at %s", ma->ma_name, pnp);
       if (ma->ma_addr != (bus_addr_t) -1)
               aprint_normal(" addr %#" PRIxBUSADDR, ma->ma_addr);

       return (UNCONF);
}

int
mainbus_submatch(device_t parent, cfdata_t cf,
                const int *ldesc, void *aux)
{
       struct mainbus_attach_args *ma = aux;

       if (cf->cf_loc[MAINBUSCF_ADDR] != MAINBUSCF_ADDR_DEFAULT &&
           cf->cf_loc[MAINBUSCF_ADDR] != ma->ma_addr)
               return (0);

       return (config_match(parent, cf, aux));
}

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