NetBSD-5.0.2/sys/arch/arm/ixp12x0/ixp12x0_pci.c
/* $NetBSD: ixp12x0_pci.c,v 1.8 2008/04/28 20:23:14 martin Exp $ */
/*
* Copyright (c) 2002, 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Ichiro FUKUHARA and Naoto Shimazaki.
*
* 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: ixp12x0_pci.c,v 1.8 2008/04/28 20:23:14 martin Exp $");
/*
* PCI configuration support for IXP12x0 Network Processor chip.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/extent.h>
#include <sys/malloc.h>
#include <uvm/uvm_extern.h>
#include <arm/ixp12x0/ixp12x0reg.h>
#include <arm/ixp12x0/ixp12x0var.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pciconf.h>
#include "opt_pci.h"
#include "pci.h"
void ixp12x0_pci_attach_hook(struct device *, struct device *,
struct pcibus_attach_args *);
int ixp12x0_pci_bus_maxdevs(void *, int);
pcitag_t ixp12x0_pci_make_tag(void *, int, int, int);
void ixp12x0_pci_decompose_tag(void *, pcitag_t, int *, int *, int *);
pcireg_t ixp12x0_pci_conf_read(void *, pcitag_t, int);
void ixp12x0_pci_conf_write(void *, pcitag_t, int, pcireg_t);
static vaddr_t ixp12x0_pci_conf_setup(void *, struct ixp12x0_softc *, pcitag_t, int);
#define PCI_CONF_LOCK(s) (s) = disable_interrupts(I32_bit)
#define PCI_CONF_UNLOCK(s) restore_interrupts((s))
#define MAX_PCI_DEVICES 4
/*
* IXM1200 PCI configuration Cycles
* Device Address
* -------------------------------------
* 0 IXP1200 0x0800 - 0x08FF
* 1 i21555 0x1000 - 0x10FF
* 2 i82559 0x2000 - 0x20FF
* 3 PMC expansion 0x4000 - 0x40FF
*/
void
ixp12x0_pci_init(pc, cookie)
pci_chipset_tag_t pc;
void *cookie;
{
#if NPCI > 0 && defined(PCI_NETBSD_CONFIGURE)
struct ixp12x0_softc *sc = cookie;
struct extent *ioext, *memext;
#endif
pc->pc_conf_v = cookie;
pc->pc_attach_hook = ixp12x0_pci_attach_hook;
pc->pc_bus_maxdevs = ixp12x0_pci_bus_maxdevs;
pc->pc_make_tag = ixp12x0_pci_make_tag;
pc->pc_decompose_tag = ixp12x0_pci_decompose_tag;
pc->pc_conf_read = ixp12x0_pci_conf_read;
pc->pc_conf_write = ixp12x0_pci_conf_write;
#if NPCI > 0 && defined(PCI_NETBSD_CONFIGURE)
ioext = extent_create("pciio", 0, IXP12X0_PCI_IO_SIZE - 1,
M_DEVBUF, NULL, 0, EX_NOWAIT);
/* PCI MEM space is mapped same address as real memory */
memext = extent_create("pcimem", IXP12X0_PCI_MEM_HWBASE,
IXP12X0_PCI_MEM_HWBASE +
IXP12X0_PCI_MEM_SIZE - 1,
M_DEVBUF, NULL, 0, EX_NOWAIT);
printf("%s: configuring PCI bus\n", sc->sc_dev.dv_xname);
pci_configure_bus(pc, ioext, memext, NULL, 0 /* XXX bus = 0 */,
arm_dcache_align);
extent_destroy(ioext);
extent_destroy(memext);
#endif
}
void
pci_conf_interrupt(pc, a, b, c, d, p)
pci_chipset_tag_t pc;
int a, b, c, d, *p;
{
/* Nothing */
}
void
ixp12x0_pci_attach_hook(parent, self, pba)
struct device *parent;
struct device *self;
struct pcibus_attach_args *pba;
{
/* Nothing to do. */
}
int
ixp12x0_pci_bus_maxdevs(v, busno)
void *v;
int busno;
{
return(MAX_PCI_DEVICES);
}
pcitag_t
ixp12x0_pci_make_tag(v, bus, device, function)
void *v;
int bus, device, function;
{
#ifdef PCI_DEBUG
printf("ixp12x0_pci_make_tag(v=%p, bus=%d, device=%d, function=%d)\n",
v, bus, device, function);
#endif
return ((bus << 16) | (device << 11) | (function << 8));
}
void
ixp12x0_pci_decompose_tag(v, tag, busp, devicep, functionp)
void *v;
pcitag_t tag;
int *busp, *devicep, *functionp;
{
#ifdef PCI_DEBUG
printf("ixp12x0_pci_decompose_tag(v=%p, tag=0x%08lx, bp=%x, dp=%x, fp=%x)\n",
v, tag, (int)busp, (int)devicep, (int)functionp);
#endif
if (busp != NULL)
*busp = (tag >> 16) & 0xff;
if (devicep != NULL)
*devicep = (tag >> 11) & 0x1f;
if (functionp != NULL)
*functionp = (tag >> 8) & 0x7;
}
static vaddr_t
ixp12x0_pci_conf_setup(v, sc, tag, offset)
void *v;
struct ixp12x0_softc *sc;
pcitag_t tag;
int offset;
{
int bus, device, function;
vaddr_t addr;
ixp12x0_pci_decompose_tag(v, tag, &bus, &device, &function);
if (bus == 0) {
/* configuration type 0 */
addr = (vaddr_t) bus_space_vaddr(sc->sc_iot, sc->sc_conf0_ioh) +
((1 << (device + 10)) | (offset & ~3));
} else {
/* configuration type 1 */
addr = (vaddr_t) bus_space_vaddr(sc->sc_iot, sc->sc_conf1_ioh) +
((bus << 16) | (device << 11) |
(function << 8) | (offset & ~3) | 1);
}
return addr;
}
pcireg_t
ixp12x0_pci_conf_read(v, tag, offset)
void *v;
pcitag_t tag;
int offset;
{
struct ixp12x0_softc *sc = v;
vaddr_t va = ixp12x0_pci_conf_setup(v, sc, tag, offset);
pcireg_t rv;
int s;
#ifdef PCI_DEBUG
printf("ixp12x0_pci_conf_read: base=%lx,va=%lx,tag=%lx,offset=%x\n",
sc->sc_conf0_ioh, va, tag, offset);
#endif
if (va == 0)
return -1;
PCI_CONF_LOCK(s);
if (badaddr_read((void *) va, sizeof(rv), &rv)) {
#ifdef PCI_DEBUG
printf("conf_read: %lx bad address\n", va);
#endif
rv = (pcireg_t) - 1;
}
PCI_CONF_UNLOCK(s);
return rv;
}
void
ixp12x0_pci_conf_write(v, tag, offset, val)
void *v;
pcitag_t tag;
int offset;
pcireg_t val;
{
struct ixp12x0_softc *sc = v;
vaddr_t va = ixp12x0_pci_conf_setup(v, sc, tag, offset);
int s;
#ifdef PCI_DEBUG
printf("ixp12x0_pci_conf_write: tag=%lx offset=%x -> va=%lx (base=%lx)\n",
tag, offset, va, sc->sc_conf0_ioh);
#endif
PCI_CONF_LOCK(s);
*(pcireg_t *) va = val;
PCI_CONF_UNLOCK(s);
}