150 lines
4.1 KiB
C
150 lines
4.1 KiB
C
/* $NetBSD: pic_prepivr.c,v 1.4 2008/04/28 20:23:32 martin Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2007 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Tim Rightnour
|
|
*
|
|
* 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: pic_prepivr.c,v 1.4 2008/04/28 20:23:32 martin Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/kernel.h>
|
|
|
|
#include <uvm/uvm_extern.h>
|
|
|
|
#include <machine/pio.h>
|
|
#include <machine/intr.h>
|
|
|
|
#include <arch/powerpc/pic/picvar.h>
|
|
|
|
#include <dev/isa/isareg.h>
|
|
#include <dev/isa/isavar.h>
|
|
|
|
static int prepivr_get_irq(struct pic_ops *, int);
|
|
static int motivr_get_irq(struct pic_ops *, int);
|
|
static void prepivr_establish_irq(struct pic_ops *, int, int, int);
|
|
|
|
vaddr_t prep_intr_reg; /* PReP interrupt vector register */
|
|
uint32_t prep_intr_reg_off; /* IVR offset within the mapped page */
|
|
|
|
#define IO_ELCR1 0x4d0
|
|
#define IO_ELCR2 0x4d1
|
|
|
|
/*
|
|
* Prior to calling init_prepivr, the port is expected to have mapped the
|
|
* page containing the IVR with mapiodev to prep_intr_reg and set up the
|
|
* prep_intr_reg_off.
|
|
*/
|
|
|
|
struct pic_ops *
|
|
setup_prepivr(int ivrtype)
|
|
{
|
|
struct i8259_ops *prepivr;
|
|
struct pic_ops *pic;
|
|
uint32_t pivr;
|
|
|
|
prepivr = malloc(sizeof(struct i8259_ops), M_DEVBUF, M_NOWAIT);
|
|
KASSERT(prepivr != NULL);
|
|
pic = &prepivr->pic;
|
|
|
|
pivr = prep_intr_reg + prep_intr_reg_off;
|
|
pic->pic_numintrs = 16;
|
|
pic->pic_cookie = (void *)pivr;
|
|
pic->pic_enable_irq = i8259_enable_irq;
|
|
pic->pic_reenable_irq = i8259_enable_irq;
|
|
pic->pic_disable_irq = i8259_disable_irq;
|
|
if (ivrtype == PIC_IVR_MOT)
|
|
pic->pic_get_irq = motivr_get_irq;
|
|
else
|
|
pic->pic_get_irq = prepivr_get_irq;
|
|
pic->pic_ack_irq = i8259_ack_irq;
|
|
pic->pic_establish_irq = prepivr_establish_irq;
|
|
pic->pic_finish_setup = NULL;
|
|
strcpy(pic->pic_name, "prepivr");
|
|
pic_add(pic);
|
|
prepivr->pending_events = 0;
|
|
prepivr->enable_mask = 0xffffffff;
|
|
prepivr->irqs = 0;
|
|
|
|
/* initialize the ELCR */
|
|
isa_outb(IO_ELCR1, (0 >> 0) & 0xff);
|
|
isa_outb(IO_ELCR2, (0 >> 8) & 0xff);
|
|
i8259_initialize();
|
|
|
|
return pic;
|
|
}
|
|
|
|
static void
|
|
prepivr_establish_irq(struct pic_ops *pic, int irq, int type, int maxlevel)
|
|
{
|
|
u_int8_t elcr[2];
|
|
int icu, bit;
|
|
|
|
icu = irq / 8;
|
|
bit = irq % 8;
|
|
elcr[0] = isa_inb(IO_ELCR1);
|
|
elcr[1] = isa_inb(IO_ELCR2);
|
|
|
|
if (type == IST_LEVEL)
|
|
elcr[icu] |= 1 << bit;
|
|
else
|
|
elcr[icu] &= ~(1 << bit);
|
|
|
|
isa_outb(IO_ELCR1, elcr[0]);
|
|
isa_outb(IO_ELCR2, elcr[1]);
|
|
}
|
|
|
|
static int
|
|
motivr_get_irq(struct pic_ops *pic, int mode)
|
|
{
|
|
int irq;
|
|
|
|
irq = i8259_get_irq(pic, mode);
|
|
/* read the IVR to ack it */
|
|
(void)inb(pic->pic_cookie);
|
|
|
|
/* i8259_get_irq will return 255 by itself, so just pass it on */
|
|
return irq;
|
|
}
|
|
|
|
static int
|
|
prepivr_get_irq(struct pic_ops *pic, int mode)
|
|
{
|
|
int irq;
|
|
|
|
irq = inb(pic->pic_cookie);
|
|
|
|
if (irq == 0 && mode == PIC_GET_IRQ)
|
|
return 255;
|
|
if (irq == 7 && mode == PIC_GET_RECHECK)
|
|
return 255;
|
|
|
|
return irq;
|
|
}
|