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/* $OpenBSD: sis85c503.c,v 1.9 2023/01/30 10:49:05 jsg Exp $ */
/* $NetBSD: sis85c503.c,v 1.2 2000/07/18 11:24:09 soda Exp $ */
/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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.
*/
/*
* Copyright (c) 1999, by UCHIYAMA Yasushi
* 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. The name of the developer 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 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 AUTHOR 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.
*/
/*
* Support for the SiS 85c503 PCI-ISA bridge interrupt controller.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <machine/intr.h>
#include <machine/bus.h>
#include <dev/pci/pcivar.h>
#include <i386/pci/pcibiosvar.h>
#include <i386/pci/sis85c503reg.h>
#include <i386/pci/piixvar.h>
int sis85c503_getclink(pciintr_icu_handle_t, int, int *);
int sis85c503_get_intr(pciintr_icu_handle_t, int, int *);
int sis85c503_set_intr(pciintr_icu_handle_t, int, int);
const struct pciintr_icu sis85c503_pci_icu = {
sis85c503_getclink,
sis85c503_get_intr,
sis85c503_set_intr,
piix_get_trigger,
piix_set_trigger,
};
int
sis85c503_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag,
pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp)
{
if (piix_init(pc, iot, tag, ptagp, phandp) == 0) {
*ptagp = &sis85c503_pci_icu;
return (0);
}
return (1);
}
int
sis85c503_getclink(pciintr_icu_handle_t v, int link, int *clinkp)
{
/* Pattern 1: simple. */
if (link >= 1 && link <= 4) {
*clinkp = SIS85C503_CFG_PIRQ_REGSTART + link - 1;
return (0);
}
/* Pattern 2: configuration register offset */
if (link >= SIS85C503_CFG_PIRQ_REGSTART &&
link <= SIS85C503_CFG_PIRQ_REGEND) {
*clinkp = link;
return (0);
}
return (1);
}
int
sis85c503_get_intr(pciintr_icu_handle_t v, int clink, int *irqp)
{
struct piix_handle *ph = v;
pcireg_t reg;
if (SIS85C503_LEGAL_LINK(clink) == 0)
return (1);
reg = pci_conf_read(ph->ph_pc, ph->ph_tag,
SIS85C503_CFG_PIRQ_REGOFS(clink));
reg = SIS85C503_CFG_PIRQ_REG(reg, clink);
if (reg & SIS85C503_CFG_PIRQ_ROUTE_DISABLE)
*irqp = 0xff;
else
*irqp = reg & SIS85C503_CFG_PIRQ_INTR_MASK;
return (0);
}
int
sis85c503_set_intr(pciintr_icu_handle_t v, int clink, int irq)
{
struct piix_handle *ph = v;
int shift;
pcireg_t reg;
if (SIS85C503_LEGAL_LINK(clink) == 0 || SIS85C503_LEGAL_IRQ(irq) == 0)
return (1);
reg = pci_conf_read(ph->ph_pc, ph->ph_tag,
SIS85C503_CFG_PIRQ_REGOFS(clink));
shift = SIS85C503_CFG_PIRQ_SHIFT(clink);
reg &= ~((SIS85C503_CFG_PIRQ_ROUTE_DISABLE |
SIS85C503_CFG_PIRQ_INTR_MASK) << shift);
reg |= (irq << shift);
pci_conf_write(ph->ph_pc, ph->ph_tag, SIS85C503_CFG_PIRQ_REGOFS(clink),
reg);
return (0);
}
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