/* $NetBSD: ali1543.c,v 1.12 2011/07/01 17:37:26 dyoung Exp $ */
/*
* Copyright (c) 2001
* HAYAKAWA Koichi. 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.
*
* 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.
*/
/*-
* 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.
*/
/* HAYAKAWA Koichi wrote ALi 1543 PCI ICU code basing on VIA82C586 driver */
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ali1543.c,v 1.12 2011/07/01 17:37:26 dyoung Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <machine/intr.h>
#include <sys/bus.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#include <i386/pci/pci_intr_fixup.h>
#include <i386/pci/piixvar.h>
int ali1543_getclink(pciintr_icu_handle_t, int, int *);
int ali1543_get_intr(pciintr_icu_handle_t, int, int *);
int ali1543_set_intr(pciintr_icu_handle_t, int, int);
const struct pciintr_icu ali1543_icu = {
ali1543_getclink,
ali1543_get_intr,
ali1543_set_intr,
piix_get_trigger,
piix_set_trigger,
};
/*
* Linux source code (linux/arch/i386/kernel/pci-irq.c) says that the
* irq order of ALi PCI ICU is shuffled.
*/
static const int ali1543_intr_shuffle_get[16] = {
0, 9, 3, 10, 4, 5, 7, 6, 1, 11, 0, 12, 0, 14, 0, 15
};
static const int ali1543_intr_shuffle_set[16] = {
0, 8, 0, 2, 4, 5, 7, 6, 0, 1, 3, 9, 11, 0, 13, 15
};
#define ALI1543_IRQ_MASK 0xdefa
#define ALI1543_LEGAL_LINK(link) (((link) >= 0) && ((link) <= 7))
#define ALI1543_LEGAL_IRQ(irq) ((1 << (irq)) & ALI1543_IRQ_MASK)
#define ALI1543_INTR_CFG_REG 0x48
#define ALI1543_INTR_PIRQA_SHIFT 0
#define ALI1543_INTR_PIRQA_MASK 0x0000000f
#define ALI1543_INTR_PIRQB_SHIFT 4
#define ALI1543_INTR_PIRQB_MASK 0x000000f0
#define ALI1543_INTR_PIRQC_SHIFT 8
#define ALI1543_INTR_PIRQC_MASK 0x00000f00
#define ALI1543_INTR_PIRQD_SHIFT 12
#define ALI1543_INTR_PIRQD_MASK 0x0000f000
#define ALI1543_INTR_PIRQ_SHIFT(clink) ((clink)*4)
#define ALI1543_INTR_PIRQ_IRQ(reg, clink) \
(((reg) >> ((clink)*4)) & 0x0f)
#define ALI1543_PIRQ(reg, clink) \
ali1543_intr_shuffle_get[ALI1543_INTR_PIRQ_IRQ((reg), (clink))]
int
ali1543_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 = &ali1543_icu;
return (0);
}
return (1);
}
int
ali1543_getclink(pciintr_icu_handle_t v, int link, int *clinkp)
{
if (ALI1543_LEGAL_LINK(link - 1)) {
*clinkp = link - 1;
return (0);
}
return (1);
}
int
ali1543_get_intr(pciintr_icu_handle_t v, int clink, int *irqp)
{
struct piix_handle *ph = v;
pcireg_t reg;
int val;
if (ALI1543_LEGAL_LINK(clink) == 0)
return (1);
reg = pci_conf_read(ph->ph_pc, ph->ph_tag, ALI1543_INTR_CFG_REG);
#ifdef DEBUG_1543
printf("ali1543: PIRQ reg 0x%08x\n", reg); /* XXX debug */
#endif /* DEBUG_1543 */
val = ALI1543_PIRQ(reg, clink);
*irqp = (val == 0) ?
X86_PCI_INTERRUPT_LINE_NO_CONNECTION : val;
return (0);
}
int
ali1543_set_intr(pciintr_icu_handle_t v, int clink, int irq)
{
struct piix_handle *ph = v;
int shift, val;
pcireg_t reg;
if (ALI1543_LEGAL_LINK(clink) == 0 || ALI1543_LEGAL_IRQ(irq) == 0)
return (1);
reg = pci_conf_read(ph->ph_pc, ph->ph_tag, ALI1543_INTR_CFG_REG);
ali1543_get_intr(v, clink, &val);
shift = ALI1543_INTR_PIRQ_SHIFT(clink);
reg &= ~(0x0f << shift);
reg |= (ali1543_intr_shuffle_set[irq] << shift);
pci_conf_write(ph->ph_pc, ph->ph_tag, ALI1543_INTR_CFG_REG, reg);
if (ali1543_get_intr(v, clink, &val) != 0 || val != irq)
return (1);
return (0);
}