NetBSD/sys/arch/arm/ixp12x0/ixp12x0_pci.c

/* $NetBSD: ixp12x0_pci.c,v 1.1 2002/07/15 16:27:17 ichiro Exp $ */
/*
 * Copyright (c) 2002 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *        This product includes software developed by the NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * 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.
 */

/*
 * 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 "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);

#define	MAX_PCI_DEVICES	21

void
ixp12x0_pci_init(pc, cookie)
	pci_chipset_tag_t pc;
	void *cookie;
{
	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;
}

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;
}

pcireg_t
ixp12x0_pci_conf_read(v, tag, offset)
	void *v;
	pcitag_t tag;
	int offset;
{
	int bus, device, function;
	u_int address;
	pcireg_t val;

	ixp12x0_pci_decompose_tag(v, tag, &bus, &device, &function);

        if (bus != 0)
		address = IXP12X0_PCI_TYPE1_VBASE | ((bus & 0xff) << 16) |
			  ((device & 0x1F) << 8) | (offset & 0xff);
	else /* bus == 0 */
		address = IXP12X0_PCI_TYPE0_VBASE | 0xc00000 | 
			  ((device &0x1f) << 3 | (function & 0x7)) << 8 |
			  (offset & 0xff);

	val = *((unsigned int *)address);

#ifdef PCI_DEBUG
	printf("ixp12x0_pci_conf_read(addr=%08x)(v=%p tag=0x%08lx offset=0x%02x)=0x%08x\n",
		address, v, tag, offset, val);
#endif
	return(val);
}

void
ixp12x0_pci_conf_write(v, tag, offset, val)
	void *v;
	pcitag_t tag;
	int offset;
	pcireg_t val;
{
	int bus, device, function;
	u_int address;

	ixp12x0_pci_decompose_tag(v, tag, &bus, &device, &function);

        if (bus != 0)
		address = IXP12X0_PCI_TYPE1_VBASE | ((bus & 0xff) << 16) |
			  ((device & 0x1F) << 8) | (offset & 0xff);
	else /* bus == 0 */
		address = IXP12X0_PCI_TYPE0_VBASE | 0xc00000 | 
			  ((device &0x1f) << 3 | (function & 0x7)) << 8 |
			  (offset & 0xff);

#ifdef PCI_DEBUG
	printf("ixp12x0_pci_conf_write(addr=%08x)(v=%p tag=0x%08lx offset=0x%02x)=0x%08x\n",
		address, v, tag, offset, val);
#endif
	*((unsigned int *)address) = val;
}