654 lines
15 KiB
C
654 lines
15 KiB
C
/*-
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* Copyright (c) 1998 Doug Rabson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: isa.c,v 1.13 1999/05/14 11:22:18 dfr Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <sys/malloc.h>
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#include <sys/rman.h>
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#include <isa/isareg.h>
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#include <isa/isavar.h>
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#include <alpha/isa/isavar.h>
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#include <machine/intr.h>
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#include <machine/intrcnt.h>
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#include <machine/resource.h>
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MALLOC_DEFINE(M_ISADEV, "isadev", "ISA device");
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/*
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* The structure used to attach devices to the Isa.
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*/
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struct isa_device {
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u_short id_port[ISA_NPORT_IVARS];
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u_short id_portsize[ISA_NPORT_IVARS];
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vm_offset_t id_maddr[ISA_NMEM_IVARS];
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vm_size_t id_msize[ISA_NMEM_IVARS];
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int id_irq[ISA_NIRQ_IVARS];
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int id_drq[ISA_NDRQ_IVARS];
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int id_flags;
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struct resource *id_portres[ISA_NPORT_IVARS];
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struct resource *id_memres[ISA_NMEM_IVARS];
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struct resource *id_irqres[ISA_NIRQ_IVARS];
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struct resource *id_drqres[ISA_NDRQ_IVARS];
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};
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#define DEVTOISA(dev) ((struct isa_device*) device_get_ivars(dev))
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static devclass_t isa_devclass;
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static struct rman isa_irq_rman;
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static void
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isa_intr_enable(int irq)
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{
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int s = splhigh();
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if (irq < 8)
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outb(IO_ICU1+1, inb(IO_ICU1+1) & ~(1 << irq));
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else
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outb(IO_ICU2+1, inb(IO_ICU2+1) & ~(1 << (irq - 8)));
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splx(s);
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}
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static void
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isa_intr_disable(int irq)
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{
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int s = splhigh();
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if (irq < 8)
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outb(IO_ICU1+1, inb(IO_ICU1+1) | (1 << irq));
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else
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outb(IO_ICU2+1, inb(IO_ICU2+1) | (1 << (irq - 8)));
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splx(s);
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}
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intrmask_t
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isa_irq_pending(void)
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{
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u_char irr1;
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u_char irr2;
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irr1 = inb(IO_ICU1);
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irr2 = inb(IO_ICU2);
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return ((irr2 << 8) | irr1);
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}
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intrmask_t
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isa_irq_mask(void)
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{
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u_char irr1;
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u_char irr2;
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irr1 = inb(IO_ICU1+1);
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irr2 = inb(IO_ICU2+1);
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return ((irr2 << 8) | irr1);
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}
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/*
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* At 'probe' time, we add all the devices which we know about to the
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* bus. The generic attach routine will probe and attach them if they
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* are alive.
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*/
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static int
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isa_probe(device_t dev)
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{
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device_set_desc(dev, "ISA bus");
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isa_init_intr();
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return bus_generic_probe(dev);
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}
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extern device_t isa_bus_device;
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static int
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isa_attach(device_t dev)
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{
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if (bootverbose)
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printf("isa_attach: mask=%04x\n", isa_irq_mask());
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/*
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* Arrange for bus_generic_attach(dev) to be called later.
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*/
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isa_bus_device = dev;
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return 0;
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}
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/*
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* Add a new child with default ivars.
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*/
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static device_t
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isa_add_child(device_t dev, device_t place, const char *name, int unit)
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{
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struct isa_device *idev;
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idev = malloc(sizeof(struct isa_device), M_ISADEV, M_NOWAIT);
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if (!idev)
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return 0;
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bzero(idev, sizeof *idev);
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idev->id_port[0] = -1;
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idev->id_port[1] = -1;
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idev->id_portsize[0] = 0;
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idev->id_portsize[1] = 0;
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idev->id_maddr[0] = 0;
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idev->id_maddr[1] = 0;
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idev->id_msize[0] = 0;
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idev->id_msize[1] = 0;
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idev->id_irq[0] = -1;
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idev->id_irq[1] = -1;
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idev->id_drq[0] = -1;
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idev->id_drq[1] = -1;
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idev->id_flags = 0;
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if (place)
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return device_add_child_after(dev, place, name, unit, idev);
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else
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return device_add_child(dev, name, unit, idev);
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}
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static void
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isa_print_child(device_t bus, device_t dev)
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{
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struct isa_device *id = DEVTOISA(dev);
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if (id->id_port[0] > 0 || id->id_port[1] > 0
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|| id->id_maddr[0] > 0 || id->id_maddr[1] > 0
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|| id->id_irq[0] >= 0 || id->id_irq[1] >= 0
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|| id->id_drq[0] >= 0 || id->id_drq[1] >= 0)
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printf(" at");
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if (id->id_port[0] > 0 && id->id_port[1] > 0) {
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printf(" ports %#x", (u_int)id->id_port[0]);
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if (id->id_portsize[0] > 1)
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printf("-%#x", (u_int)(id->id_port[0]
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+ id->id_portsize[0] - 1));
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printf(" and %#x", (u_int)id->id_port[1]);
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if (id->id_portsize[1] > 1)
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printf("-%#x", (u_int)(id->id_port[1]
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+ id->id_portsize[1] - 1));
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} else if (id->id_port[0] > 0) {
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printf(" port %#x", (u_int)id->id_port[0]);
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if (id->id_portsize[0] > 1)
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printf("-%#x", (u_int)(id->id_port[0]
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+ id->id_portsize[0] - 1));
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} else if (id->id_port[1] > 0) {
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printf(" port %#x", (u_int)id->id_port[1]);
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if (id->id_portsize[1] > 1)
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printf("-%#x", (u_int)(id->id_port[1]
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+ id->id_portsize[1] - 1));
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}
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if (id->id_maddr[0] && id->id_maddr[1]) {
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printf(" iomem %#x", (u_int)id->id_maddr[0]);
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if (id->id_msize[0])
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printf("-%#x", (u_int)(id->id_maddr[0]
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+ id->id_msize[0] - 1));
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printf(" and %#x", (u_int)id->id_maddr[1]);
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if (id->id_msize[1])
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printf("-%#x", (u_int)(id->id_maddr[1]
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+ id->id_msize[1] - 1));
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} else if (id->id_maddr[0]) {
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printf(" iomem %#x", (u_int)id->id_maddr[0]);
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if (id->id_msize[0])
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printf("-%#x", (u_int)(id->id_maddr[0]
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+ id->id_msize[0] - 1));
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} else if (id->id_maddr[1]) {
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printf(" iomem %#x", (u_int)id->id_maddr[1]);
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if (id->id_msize[1])
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printf("-%#x", (u_int)(id->id_maddr[1]
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+ id->id_msize[1] - 1));
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}
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#if 0
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if (id->id_irq[0] >= 0 && id->id_irq[1] >= 0)
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printf(" irqs %d and %d", id->id_irq[0], id->id_irq[1]);
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else if (id->id_irq[0] >= 0)
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printf(" irq %d", id->id_irq[0]);
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else if (id->id_irq[1] >= 0)
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printf(" irq %d", id->id_irq[1]);
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#endif
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if (id->id_drq[0] >= 0 && id->id_drq[1] >= 0)
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printf(" drqs %d and %d", id->id_drq[0], id->id_drq[1]);
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else if (id->id_drq[0] >= 0)
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printf(" drq %d", id->id_drq[0]);
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else if (id->id_drq[1] >= 0)
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printf(" drq %d", id->id_drq[1]);
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if (id->id_flags)
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printf(" flags %#x", id->id_flags);
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printf(" on %s%d",
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device_get_name(bus), device_get_unit(bus));
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}
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static int
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isa_read_ivar(device_t bus, device_t dev,
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int index, u_long* result)
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{
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struct isa_device* idev = DEVTOISA(dev);
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switch (index) {
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case ISA_IVAR_PORT_0:
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*result = idev->id_port[0];
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break;
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case ISA_IVAR_PORT_1:
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*result = idev->id_port[1];
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break;
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case ISA_IVAR_PORTSIZE_0:
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*result = idev->id_portsize[0];
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break;
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case ISA_IVAR_PORTSIZE_1:
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*result = idev->id_portsize[1];
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break;
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case ISA_IVAR_MADDR_0:
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*result = idev->id_maddr[0];
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break;
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case ISA_IVAR_MADDR_1:
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*result = idev->id_maddr[1];
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break;
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case ISA_IVAR_MSIZE_0:
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*result = idev->id_msize[0];
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break;
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case ISA_IVAR_MSIZE_1:
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*result = idev->id_msize[1];
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break;
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case ISA_IVAR_IRQ_0:
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*result = idev->id_irq[0];
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break;
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case ISA_IVAR_IRQ_1:
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*result = idev->id_irq[1];
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break;
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case ISA_IVAR_DRQ_0:
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*result = idev->id_drq[0];
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break;
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case ISA_IVAR_DRQ_1:
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*result = idev->id_drq[1];
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break;
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case ISA_IVAR_FLAGS:
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*result = idev->id_flags;
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break;
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default:
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return (ENOENT);
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}
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return (0);
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}
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static int
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isa_write_ivar(device_t bus, device_t dev,
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int index, u_long value)
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{
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struct isa_device* idev = DEVTOISA(dev);
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switch (index) {
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case ISA_IVAR_PORT_0:
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idev->id_port[0] = value;
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break;
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case ISA_IVAR_PORT_1:
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idev->id_port[1] = value;
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break;
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case ISA_IVAR_PORTSIZE_0:
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idev->id_portsize[0] = value;
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break;
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case ISA_IVAR_PORTSIZE_1:
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idev->id_portsize[1] = value;
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break;
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case ISA_IVAR_MADDR_0:
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idev->id_maddr[0] = value;
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break;
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case ISA_IVAR_MADDR_1:
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idev->id_maddr[1] = value;
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break;
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case ISA_IVAR_MSIZE_0:
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idev->id_msize[0] = value;
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break;
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case ISA_IVAR_MSIZE_1:
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idev->id_msize[1] = value;
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break;
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case ISA_IVAR_IRQ_0:
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idev->id_irq[0] = value;
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break;
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case ISA_IVAR_IRQ_1:
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idev->id_irq[1] = value;
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break;
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case ISA_IVAR_DRQ_0:
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idev->id_drq[0] = value;
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break;
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case ISA_IVAR_DRQ_1:
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idev->id_drq[1] = value;
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break;
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case ISA_IVAR_FLAGS:
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idev->id_flags = value;
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break;
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default:
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return (ENOENT);
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}
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return (0);
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}
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void isa_init_intr(void)
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{
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static int initted = 0;
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if (initted) return;
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initted = 1;
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isa_irq_rman.rm_start = 0;
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isa_irq_rman.rm_end = 15;
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isa_irq_rman.rm_type = RMAN_ARRAY;
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isa_irq_rman.rm_descr = "ISA Interrupt request lines";
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if (rman_init(&isa_irq_rman)
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|| rman_manage_region(&isa_irq_rman, 0, 1)
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|| rman_manage_region(&isa_irq_rman, 3, 15))
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panic("isa_probe isa_irq_rman");
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/* mask all isa interrupts */
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outb(IO_ICU1+1, 0xff);
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outb(IO_ICU2+1, 0xff);
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/* make sure chaining irq is enabled */
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isa_intr_enable(2);
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}
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struct resource *
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isa_alloc_intr(device_t bus, device_t child, int irq)
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{
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return rman_reserve_resource(&isa_irq_rman, irq, irq, 1,
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0, child);
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}
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int
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isa_release_intr(device_t bus, device_t child, struct resource *r)
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{
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return rman_release_resource(r);
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}
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/*
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* This implementation simply passes the request up to the parent
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* bus, which in our case is the pci chipset device, substituting any
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* configured values if the caller defaulted. We can get away with
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* this because there is no special mapping for ISA resources on this
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* platform. When porting this code to another architecture, it may be
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* necessary to interpose a mapping layer here.
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*
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* We manage our own interrupt resources since ISA interrupts go through
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* the ISA PIC, not the PCI interrupt controller.
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*/
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static struct resource *
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isa_alloc_resource(device_t bus, device_t child, int type, int *rid,
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u_long start, u_long end, u_long count, u_int flags)
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{
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int isdefault;
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struct resource *rv, **rvp;
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struct isa_device *id;
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if (child) {
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/*
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* If this is our child, then use the isa_device to find
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* defaults and to record results.
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*/
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if (device_get_devclass(device_get_parent(child)) == isa_devclass)
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id = DEVTOISA(child);
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else
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id = NULL;
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} else
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id = NULL;
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isdefault = (start == 0UL && end == ~0UL && *rid == 0);
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if (*rid > 1)
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return 0;
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switch (type) {
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case SYS_RES_IRQ:
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/*
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* The hack implementation of intr_create() passes a
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* NULL child device.
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*/
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if (isdefault && id && id->id_irq[0] >= 0) {
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start = id->id_irq[0];
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end = id->id_irq[0];
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count = 1;
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}
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rv = rman_reserve_resource(&isa_irq_rman,
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start, end, count,
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0, child);
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if (!rv)
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return 0;
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if (id) {
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id->id_irqres[*rid] = rv;
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id->id_irq[*rid] = rv->r_start;
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}
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return rv;
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case SYS_RES_MEMORY:
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if (isdefault && id->id_maddr[0]) {
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start = id->id_maddr[0];
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count = max(count, (u_long)id->id_msize[0]);
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end = id->id_maddr[0] + count;
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}
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rvp = &id->id_memres[*rid];
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break;
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case SYS_RES_IOPORT:
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if (isdefault && id->id_port[0]) {
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start = id->id_port[0];
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count = max(count, (u_long)id->id_portsize[0]);
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end = id->id_port[0] + count;
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}
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rvp = &id->id_portres[*rid];
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break;
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default:
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return 0;
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}
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/*
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* If the client attempts to reallocate a resource without
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* releasing what was there previously, die horribly so that
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* he knows how he !@#$ed up.
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*/
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if (*rvp != 0)
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panic("%s%d: (%d, %d) not free for %s%d\n",
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device_get_name(bus), device_get_unit(bus),
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type, *rid,
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device_get_name(child), device_get_unit(child));
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/*
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* nexus_alloc_resource had better not change *rid...
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*/
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rv = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
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start, end, count, flags);
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if ((*rvp = rv) != 0) {
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switch (type) {
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case SYS_RES_MEMORY:
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id->id_maddr[*rid] = rv->r_start;
|
|
id->id_msize[*rid] = count;
|
|
break;
|
|
case SYS_RES_IOPORT:
|
|
id->id_port[*rid] = rv->r_start;
|
|
id->id_portsize[*rid] = count;
|
|
break;
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
static int
|
|
isa_release_resource(device_t bus, device_t child, int type, int rid,
|
|
struct resource *r)
|
|
{
|
|
int rv;
|
|
struct isa_device *id = DEVTOISA(child);
|
|
|
|
if (rid > 1)
|
|
return EINVAL;
|
|
|
|
switch (type) {
|
|
case SYS_RES_IRQ:
|
|
return (rman_release_resource(r));
|
|
case SYS_RES_DRQ:
|
|
case SYS_RES_IOPORT:
|
|
case SYS_RES_MEMORY:
|
|
break;
|
|
default:
|
|
return (ENOENT);
|
|
}
|
|
|
|
rv = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r);
|
|
|
|
if (rv == 0) {
|
|
switch (type) {
|
|
case SYS_RES_IRQ:
|
|
id->id_irqres[rid] = 0;
|
|
id->id_irq[rid] = -1;
|
|
break;
|
|
|
|
case SYS_RES_DRQ:
|
|
id->id_drqres[rid] = 0;
|
|
id->id_drq[rid] = -1;
|
|
break;
|
|
|
|
case SYS_RES_MEMORY:
|
|
id->id_memres[rid] = 0;
|
|
id->id_maddr[rid] = 0;
|
|
id->id_msize[rid] = 0;
|
|
break;
|
|
|
|
case SYS_RES_IOPORT:
|
|
id->id_portres[rid] = 0;
|
|
id->id_port[rid] = 0;
|
|
id->id_portsize[rid] = 0;
|
|
break;
|
|
|
|
default:
|
|
return ENOENT;
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
struct isa_intr {
|
|
void *ih;
|
|
driver_intr_t *intr;
|
|
void *arg;
|
|
int irq;
|
|
};
|
|
|
|
/*
|
|
* Wrap ISA interrupt routines so that we can feed non-specific
|
|
* EOI to the PICs.
|
|
*/
|
|
|
|
static void
|
|
isa_handle_intr(void *arg)
|
|
{
|
|
struct isa_intr *ii = arg;
|
|
int irq = ii->irq;
|
|
|
|
ii->intr(ii->arg);
|
|
|
|
if (ii->irq > 7)
|
|
outb(IO_ICU2, 0x20 | (irq & 7));
|
|
outb(IO_ICU1, 0x20 | (irq > 7 ? 2 : irq));
|
|
}
|
|
|
|
int
|
|
isa_setup_intr(device_t dev, device_t child,
|
|
struct resource *irq, int flags,
|
|
driver_intr_t *intr, void *arg, void **cookiep)
|
|
{
|
|
struct isa_intr *ii;
|
|
int error;
|
|
|
|
error = rman_activate_resource(irq);
|
|
if (error)
|
|
return error;
|
|
|
|
ii = malloc(sizeof(struct isa_intr), M_DEVBUF, M_NOWAIT);
|
|
if (!ii)
|
|
return ENOMEM;
|
|
ii->intr = intr;
|
|
ii->arg = arg;
|
|
ii->irq = irq->r_start;
|
|
|
|
error = alpha_setup_intr(0x800 + (irq->r_start << 4),
|
|
isa_handle_intr, ii, &ii->ih,
|
|
&intrcnt[INTRCNT_ISA_IRQ + irq->r_start]);
|
|
if (error) {
|
|
free(ii, M_DEVBUF);
|
|
return error;
|
|
}
|
|
isa_intr_enable(irq->r_start);
|
|
|
|
*cookiep = ii;
|
|
|
|
if (child)
|
|
device_printf(child, "interrupting at ISA irq %d\n",
|
|
(int)irq->r_start);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
isa_teardown_intr(device_t dev, device_t child,
|
|
struct resource *irq, void *cookie)
|
|
{
|
|
struct isa_intr *ii = cookie;
|
|
|
|
alpha_teardown_intr(ii->ih);
|
|
isa_intr_disable(irq->r_start);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static device_method_t isa_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, isa_probe),
|
|
DEVMETHOD(device_attach, isa_attach),
|
|
DEVMETHOD(device_detach, bus_generic_detach),
|
|
DEVMETHOD(device_shutdown, bus_generic_shutdown),
|
|
|
|
/* Bus interface */
|
|
DEVMETHOD(bus_add_child, isa_add_child),
|
|
DEVMETHOD(bus_print_child, isa_print_child),
|
|
DEVMETHOD(bus_read_ivar, isa_read_ivar),
|
|
DEVMETHOD(bus_write_ivar, isa_write_ivar),
|
|
DEVMETHOD(bus_alloc_resource, isa_alloc_resource),
|
|
DEVMETHOD(bus_release_resource, isa_release_resource),
|
|
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
|
|
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
|
|
DEVMETHOD(bus_setup_intr, isa_setup_intr),
|
|
DEVMETHOD(bus_teardown_intr, isa_teardown_intr),
|
|
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t isa_driver = {
|
|
"isa",
|
|
isa_methods,
|
|
1, /* no softc */
|
|
};
|
|
|
|
DRIVER_MODULE(isa, isab, isa_driver, isa_devclass, 0, 0);
|