131 lines
3.4 KiB
C
131 lines
3.4 KiB
C
/* $NetBSD: pciconf_indirect.c,v 1.5 2011/06/18 06:41:43 matt Exp $ */
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/*-
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* Copyright (c) 2007 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Tim Rightnour
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Generic PowerPC functions for talking to an indirect configuration style
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* PCI Bridge.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: pciconf_indirect.c,v 1.5 2011/06/18 06:41:43 matt Exp $");
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#define _POWERPC_BUS_DMA_PRIVATE
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/device.h>
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#include <sys/bus.h>
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#include <sys/intr.h>
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#include <uvm/uvm_extern.h>
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#include <machine/pio.h>
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#if NISA > 0
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#include <dev/isa/isavar.h>
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#endif
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcidevs.h>
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#define PCI_MODE1_ENABLE 0x80000000UL
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void
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genppc_pci_indirect_attach_hook(device_t parent, device_t self,
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struct pcibus_attach_args *pba)
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{
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if (pba->pba_bus != 0)
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return;
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printf(": indirect configuration space access");
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}
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pcitag_t
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genppc_pci_indirect_make_tag(void *v, int bus, int device, int function)
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{
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pcitag_t tag;
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if (bus >= 256 || device >= 32 || function >= 8)
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panic("pci_make_tag: bad request");
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tag = PCI_MODE1_ENABLE |
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(bus << 16) | (device << 11) | (function << 8);
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return tag;
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}
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void
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genppc_pci_indirect_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp,
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int *fp)
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{
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if (bp != NULL)
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*bp = (tag >> 16) & 0xff;
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if (dp != NULL)
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*dp = (tag >> 11) & 0x1f;
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if (fp != NULL)
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*fp = (tag >> 8) & 0x7;
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return;
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}
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pcireg_t
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genppc_pci_indirect_conf_read(void *v, pcitag_t tag, int reg)
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{
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pci_chipset_tag_t pc = (pci_chipset_tag_t)v;
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pcireg_t data;
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int s;
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s = splhigh();
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out32rb(pc->pc_addr, tag | reg);
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data = in32rb(pc->pc_data);
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out32rb(pc->pc_addr, 0);
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splx(s);
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return data;
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}
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void
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genppc_pci_indirect_conf_write(void *v, pcitag_t tag, int reg, pcireg_t data)
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{
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pci_chipset_tag_t pc = (pci_chipset_tag_t)v;
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int s;
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s = splhigh();
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out32rb(pc->pc_addr, tag | reg);
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out32rb(pc->pc_data, data);
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out32rb(pc->pc_addr, 0);
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splx(s);
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}
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