/* $NetBSD: sbbrz_pci.c,v 1.8 2017/07/24 09:56:46 mrg Exp $ */

/*
 * Copyright 2000, 2001
 * Broadcom Corporation. All rights reserved.
 * 
 * This software is furnished under license and may be used and copied only
 * in accordance with the following terms and conditions.  Subject to these
 * conditions, you may download, copy, install, use, modify and distribute
 * modified or unmodified copies of this software in source and/or binary
 * form. No title or ownership is transferred hereby.
 * 
 * 1) Any source code used, modified or distributed must reproduce and
 *    retain this copyright notice and list of conditions as they appear in
 *    the source file.
 * 
 * 2) No right is granted to use any trade name, trademark, or logo of
 *    Broadcom Corporation. Neither the "Broadcom Corporation" name nor any
 *    trademark or logo of Broadcom Corporation may be used to endorse or
 *    promote products derived from this software without the prior written
 *    permission of Broadcom Corporation.
 * 
 * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED
 *    WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
 *    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
 *    NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE
 *    FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE
 *    LIABLE FOR 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), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/* from: $NetBSD: apecs_pci.c,v 1.18 2000/06/29 08:58:45 mrg Exp */

/*
 * Copyright (c) 1995, 1996 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Chris G. Demetriou
 * 
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

#include <sys/cdefs.h>                  /* RCS ID & Copyright macro defns */

__KERNEL_RCSID(0, "$NetBSD: sbbrz_pci.c,v 1.8 2017/07/24 09:56:46 mrg Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <uvm/uvm_extern.h>

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

#include <mips/locore.h>
#include <mips/sibyte/include/sb1250_regs.h>
#include <mips/sibyte/include/sb1250_scd.h>
#include <mips/sibyte/include/sb1250_int.h>
#include <mips/sibyte/pci/sbbrzvar.h>

#include <evbmips/sbmips/systemsw.h>

void            sbbrz_pci_attach_hook(device_t, device_t,
                    struct pcibus_attach_args *);
static int      sbbrz_pci_bus_maxdevs(void *, int);
static pcitag_t sbbrz_pci_make_tag(void *, int, int, int);
static void     sbbrz_pci_decompose_tag(void *, pcitag_t, int *, int *, int *);

static pcireg_t sbbrz_pci_conf_read(void *, pcitag_t, int);
static void     sbbrz_pci_conf_write(void *, pcitag_t, int, pcireg_t);
#ifdef PCI_NETBSD_CONFIGURE
static void     sbbrz_pci_conf_interrupt(void *, int, int, int, int, int *);
#endif

static int      sbbrz_pci_intr_map(const struct pci_attach_args *,
                    pci_intr_handle_t *);
static const char *
                sbbrz_pci_intr_string(void *, pci_intr_handle_t, char *, size_t);
static const struct evcnt *
                sbbrz_pci_intr_evcnt(void *, pci_intr_handle_t);
static void *   sbbrz_pci_intr_establish(void *, pci_intr_handle_t,
                    int, int (*)(void *), void *);
static void     sbbrz_pci_intr_disestablish(void *, void *);


void
sbbrz_pci_init(pci_chipset_tag_t pc, void *v)
{

        pc->pc_conf_v = v;
        pc->pc_attach_hook = sbbrz_pci_attach_hook;
        pc->pc_bus_maxdevs = sbbrz_pci_bus_maxdevs;
        pc->pc_make_tag = sbbrz_pci_make_tag;
        pc->pc_decompose_tag = sbbrz_pci_decompose_tag;
        pc->pc_conf_read = sbbrz_pci_conf_read;
        pc->pc_conf_write = sbbrz_pci_conf_write;
        pc->pc_intr_map = sbbrz_pci_intr_map;
        pc->pc_intr_string = sbbrz_pci_intr_string;
        pc->pc_intr_evcnt = sbbrz_pci_intr_evcnt;
        pc->pc_intr_establish = sbbrz_pci_intr_establish;
        pc->pc_intr_disestablish = sbbrz_pci_intr_disestablish;
#ifdef PCI_NETBSD_CONFIGURE
        pc->pc_conf_interrupt = sbbrz_pci_conf_interrupt;
#endif
#ifdef __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH
        pc->pc_pciide_compat_intr_establish = sbbrz_pciide_compat_intr_establish;
#endif
}

void
sbbrz_pci_attach_hook(device_t parent, device_t self,
    struct pcibus_attach_args *pba)
{
}

int
sbbrz_pci_bus_maxdevs(void *cpv, int busno)
{
        uint64_t regval;
        int host;

        /* If not the PCI bus directly off the 1250, always up to 32 devs.  */
        if (busno != 0)
                return 32;

        /* If the PCI on the 1250, 32 devices if host mode, otherwise only 2. */
        regval = mips3_ld((register_t)MIPS_PHYS_TO_KSEG1(A_SCD_SYSTEM_CFG));
        host = (regval & M_SYS_PCI_HOST) != 0;

        return (host ? 32 : 2);
}

pcitag_t
sbbrz_pci_make_tag(void *cpv, int b, int d, int f)
{

        return (b << 16) | (d << 11) | (f << 8);
}

void
sbbrz_pci_decompose_tag(void *cpv, pcitag_t tag,
        int *bp, int *dp, int *fp)
{

        if (bp != NULL)
                *bp = (tag >> 16) & 0xff;
        if (dp != NULL)
                *dp = (tag >> 11) & 0x1f;
        if (fp != NULL)
                *fp = (tag >> 8) & 0x7;
}

pcireg_t
sbbrz_pci_conf_read(void *cpv, pcitag_t tag, int offset)
{
        uint64_t addr;

#ifdef DIAGNOSTIC
        if ((offset & 0x3) != 0)
                panic ("pci_conf_read: misaligned");
#endif

        if ((unsigned int)offset >= PCI_CONF_SIZE)
                return 0xffffffff;

        addr = A_PHYS_LDTPCI_CFG_MATCH_BITS + tag + offset;
        addr = MIPS_PHYS_TO_XKPHYS(MIPS3_TLB_ATTR_UNCACHED, addr);

        __asm volatile("sync");

        if (badaddr64(addr, 4) != 0)
                return 0xffffffff;

        return mips3_ld(addr);
}

void
sbbrz_pci_conf_write(void *cpv, pcitag_t tag, int offset, pcireg_t data)
{
        uint64_t addr;

#ifdef DIAGNOSTIC
        if ((offset & 0x3) != 0)
                panic ("pci_conf_write: misaligned");
#endif

        if ((unsigned int)offset >= PCI_CONF_SIZE)
                return;

        addr = A_PHYS_LDTPCI_CFG_MATCH_BITS + tag + offset;
        addr = MIPS_PHYS_TO_XKPHYS(MIPS3_TLB_ATTR_UNCACHED, addr);

        return mips3_sd(addr, data);
}

int
sbbrz_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
        int bus, device, func;
        sbbrz_pci_decompose_tag(NULL, pa->pa_intrtag, &bus, &device, &func);
        *ihp = 0;
        if (pa->pa_intrpin == PCI_INTERRUPT_PIN_NONE)
                return EINVAL;
        if (bus == 0) {
                *ihp = K_INT_PCI_INTA
                    + (((device-5) + pa->pa_intrswiz + pa->pa_intrpin - PCI_INTERRUPT_PIN_A) % 4);
                return 0;
        }
        return EOPNOTSUPP;
}

const char *
sbbrz_pci_intr_string(void *v, pci_intr_handle_t ih, char *buf, size_t len)
{
        char c;

        switch (ih) {
        default:                c = '?'; break;
        case K_INT_PCI_INTA:    c = 'a'; break;
        case K_INT_PCI_INTB:    c = 'b'; break;
        case K_INT_PCI_INTC:    c = 'c'; break;
        case K_INT_PCI_INTD:    c = 'd'; break;
        }
        snprintf(buf, len, "pci int%c", c);
        return buf;
}

const struct evcnt *
sbbrz_pci_intr_evcnt(void *v, pci_intr_handle_t ih)
{
        return NULL;
}

void *
sbbrz_pci_intr_establish(void *v, pci_intr_handle_t ih, int level,
        int (*handler)(void *), void *arg)
{
        return cpu_intr_establish(ih, level,
            (void (*)(void *, uint32_t, vaddr_t))handler, arg);
}

void
sbbrz_pci_intr_disestablish(void *v, void *ih)
{
}