506 lines
14 KiB
C
506 lines
14 KiB
C
/* $NetBSD: pci_machdep.c,v 1.37 2009/03/14 21:04:12 dsl Exp $ */
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/*
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* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
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* Copyright (c) 1994 Charles M. Hannum. 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Charles M. Hannum.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Machine-specific functions for PCI autoconfiguration.
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*
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* On PCs, there are two methods of generating PCI configuration cycles.
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* We try to detect the appropriate mechanism for this machine and set
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* up a few function pointers to access the correct method directly.
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*
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* The configuration method can be hard-coded in the config file by
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* using `options PCI_CONF_MODE=N', where `N' is the configuration mode
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* as defined section 3.6.4.1, `Generating Configuration Cycles'.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: pci_machdep.c,v 1.37 2009/03/14 21:04:12 dsl Exp $");
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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 <uvm/uvm_extern.h>
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#define _POWERPC_BUS_DMA_PRIVATE
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#include <machine/bus.h>
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#include <machine/autoconf.h>
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#include <machine/intr.h>
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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/ppbreg.h>
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#include <dev/pci/pcidevs.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_pci.h>
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#include "opt_macppc.h"
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static void fixpci(int, pci_chipset_tag_t);
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static int find_node_intr(int, u_int32_t *, u_int32_t *);
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static void fix_cardbus_bridge(int, pci_chipset_tag_t, pcitag_t);
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#ifdef PB3400_CARDBUS_HACK
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int cardbus_number = 2;
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const char *pb3400_compat[] = {"AAPL,3400/2400", NULL};
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#endif
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pcitag_t genppc_pci_indirect_make_tag(void *, int, int, int);
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void genppc_pci_indirect_decompose_tag(void *, pcitag_t, int *, int *, int *);
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void
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macppc_pci_attach_hook(struct device *parent, struct device *self, struct pcibus_attach_args *pba)
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{
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pci_chipset_tag_t pc = pba->pba_pc;
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int bus = pba->pba_bus;
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int node, nn, sz;
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int32_t busrange[2];
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for (node = pc->pc_node; node; node = nn) {
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sz = OF_getprop(node, "bus-range", busrange, 8);
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if (sz == 8 && busrange[0] == bus) {
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fixpci(node, pc);
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return;
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}
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if ((nn = OF_child(node)) != 0)
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continue;
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while ((nn = OF_peer(node)) == 0) {
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node = OF_parent(node);
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if (node == pc->pc_node)
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return; /* not found */
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}
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}
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}
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void
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macppc_pci_get_chipset_tag(pci_chipset_tag_t pc)
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{
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pc->pc_conf_v = (void *)pc;
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pc->pc_attach_hook = macppc_pci_attach_hook;
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pc->pc_bus_maxdevs = genppc_pci_bus_maxdevs;
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pc->pc_make_tag = genppc_pci_indirect_make_tag;
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pc->pc_decompose_tag = genppc_pci_indirect_decompose_tag;
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pc->pc_intr_v = (void *)pc;
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pc->pc_intr_map = genppc_pci_intr_map;
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pc->pc_intr_string = genppc_pci_intr_string;
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pc->pc_intr_evcnt = genppc_pci_intr_evcnt;
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pc->pc_intr_establish = genppc_pci_intr_establish;
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pc->pc_intr_disestablish = genppc_pci_intr_disestablish;
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pc->pc_conf_interrupt = genppc_pci_conf_interrupt;
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pc->pc_conf_hook = genppc_pci_conf_hook;
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pc->pc_bus = 0;
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pc->pc_node = 0;
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pc->pc_memt = 0;
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pc->pc_iot = 0;
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}
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#define pcibus(x) \
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(((x) & OFW_PCI_PHYS_HI_BUSMASK) >> OFW_PCI_PHYS_HI_BUSSHIFT)
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#define pcidev(x) \
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(((x) & OFW_PCI_PHYS_HI_DEVICEMASK) >> OFW_PCI_PHYS_HI_DEVICESHIFT)
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#define pcifunc(x) \
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(((x) & OFW_PCI_PHYS_HI_FUNCTIONMASK) >> OFW_PCI_PHYS_HI_FUNCTIONSHIFT)
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static void
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fixpci(int parent, pci_chipset_tag_t pc)
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{
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int node;
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pcitag_t tag;
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pcireg_t csr, intr, id, cr;
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int len, i, ilen;
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int32_t irqs[4];
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struct {
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u_int32_t phys_hi, phys_mid, phys_lo;
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u_int32_t size_hi, size_lo;
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} addr[8];
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struct {
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u_int32_t phys_hi, phys_mid, phys_lo;
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u_int32_t icells[5];
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} iaddr;
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/*
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* first hack - here we make the Ethernet portion of a
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* UMAX E100 card work
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*/
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#ifdef UMAX_E100_HACK
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tag = pci_make_tag(pc, 0, 17, 0);
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id = pci_conf_read(pc, tag, PCI_ID_REG);
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if ((PCI_VENDOR(id) == PCI_VENDOR_DEC) &&
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(PCI_PRODUCT(id) == PCI_PRODUCT_DEC_21140)) {
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/* this could be one */
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pcireg_t isp, reg;
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pcitag_t tag_isp = pci_make_tag(pc, 0, 13, 0);
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/*
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* here we go. We shouldn't encounter this anywhere else
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* than on a UMAX S900 with an E100 board
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* look at 00:0d:00 for a Qlogic ISP 1020 to
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* make sure we really have an E100 here
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*/
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aprint_debug("\nfound E100 candidate tlp");
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isp = pci_conf_read(pc, tag_isp, PCI_ID_REG);
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if ((PCI_VENDOR(isp) == PCI_VENDOR_QLOGIC) &&
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(PCI_PRODUCT(isp) == PCI_PRODUCT_QLOGIC_ISP1020)) {
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aprint_verbose("\nenabling UMAX E100 ethernet");
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pci_conf_write(pc, tag, 0x14, 0x80000000);
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/* now enable MMIO and busmastering */
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reg = pci_conf_read(pc, tag,
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PCI_COMMAND_STATUS_REG);
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reg |= PCI_COMMAND_MEM_ENABLE |
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PCI_COMMAND_MASTER_ENABLE;
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pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG,
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reg);
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/* and finally the interrupt */
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reg = pci_conf_read(pc, tag, PCI_INTERRUPT_REG);
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reg &= ~PCI_INTERRUPT_LINE_MASK;
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reg |= 23;
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pci_conf_write(pc, tag, PCI_INTERRUPT_REG, reg);
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}
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}
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#endif
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len = OF_getprop(parent, "#interrupt-cells", &ilen, sizeof(ilen));
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if (len < 0)
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ilen = 0;
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for (node = OF_child(parent); node; node = OF_peer(node)) {
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len = OF_getprop(node, "assigned-addresses", addr,
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sizeof(addr));
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if (len < (int)sizeof(addr[0]))
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continue;
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tag = pci_make_tag(pc, pcibus(addr[0].phys_hi),
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pcidev(addr[0].phys_hi),
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pcifunc(addr[0].phys_hi));
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/*
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* Make sure the IO and MEM enable bits are set in the CSR.
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*/
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csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG);
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csr &= ~(PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE);
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for (i = 0; i < len / sizeof(addr[0]); i++) {
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switch (addr[i].phys_hi & OFW_PCI_PHYS_HI_SPACEMASK) {
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case OFW_PCI_PHYS_HI_SPACE_IO:
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csr |= PCI_COMMAND_IO_ENABLE;
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break;
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case OFW_PCI_PHYS_HI_SPACE_MEM32:
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case OFW_PCI_PHYS_HI_SPACE_MEM64:
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csr |= PCI_COMMAND_MEM_ENABLE;
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break;
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}
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}
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pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, csr);
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/*
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* Make sure the line register is programmed with the
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* interrupt mapping.
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*/
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if (ilen == 0) {
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/*
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* Early Apple OFW implementation don't handle
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* interrupts as defined by the OFW PCI bindings.
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*/
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len = OF_getprop(node, "AAPL,interrupts", irqs, 4);
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} else {
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iaddr.phys_hi = addr[0].phys_hi;
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iaddr.phys_mid = addr[0].phys_mid;
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iaddr.phys_lo = addr[0].phys_lo;
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/*
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* Thankfully, PCI can only have one entry in its
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* "interrupts" property.
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*/
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len = OF_getprop(node, "interrupts", &iaddr.icells[0],
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4*ilen);
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if (len != 4*ilen)
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continue;
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len = find_node_intr(node, &iaddr.phys_hi, irqs);
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}
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if (len <= 0) {
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/*
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* If we still don't have an interrupt, try one
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* more time. This case covers devices behind the
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* PCI-PCI bridge in a UMAX S900 or similar (9500?)
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* system. These slots all share the bridge's
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* interrupt.
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*/
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len = find_node_intr(node, &addr[0].phys_hi, irqs);
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if (len <= 0)
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continue;
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}
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/*
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* For PowerBook 2400, 3400 and original G3:
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* check if we have a 2nd ohare PIC - if so frob the built-in
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* tlp's IRQ to 60
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* first see if we have something on bus 0 device 13 and if
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* it's a DEC 21041
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*/
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id = pci_conf_read(pc, tag, PCI_ID_REG);
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if ((tag == pci_make_tag(pc, 0, 13, 0)) &&
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(PCI_VENDOR(id) == PCI_VENDOR_DEC) &&
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(PCI_PRODUCT(id) == PCI_PRODUCT_DEC_21041)) {
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/* now look for the 2nd ohare */
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if (OF_finddevice("/bandit/pci106b,7") != -1) {
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irqs[0] = 60;
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aprint_verbose("\nohare: frobbing tlp IRQ to 60");
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}
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}
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intr = pci_conf_read(pc, tag, PCI_INTERRUPT_REG);
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intr &= ~PCI_INTERRUPT_LINE_MASK;
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intr |= irqs[0] & PCI_INTERRUPT_LINE_MASK;
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pci_conf_write(pc, tag, PCI_INTERRUPT_REG, intr);
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/* fix secondary bus numbers on CardBus bridges */
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cr = pci_conf_read(pc, tag, PCI_CLASS_REG);
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if ((PCI_CLASS(cr) == PCI_CLASS_BRIDGE) &&
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(PCI_SUBCLASS(cr) == PCI_SUBCLASS_BRIDGE_CARDBUS)) {
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uint32_t bi, busid;
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/*
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* we found a CardBus bridge. Check if the bus number
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* is sane
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*/
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bi = pci_conf_read(pc, tag, PPB_REG_BUSINFO);
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busid = bi & 0xff;
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if (busid == 0) {
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fix_cardbus_bridge(node, pc, tag);
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}
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}
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}
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}
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static void
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fix_cardbus_bridge(int node, pci_chipset_tag_t pc, pcitag_t tag)
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{
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uint32_t bus_number = 0xffffffff;
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pcireg_t bi;
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int bus, dev, fn, ih, len;
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char path[256];
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#if PB3400_CARDBUS_HACK
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int root_node;
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root_node = OF_finddevice("/");
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if (of_compatible(root_node, pb3400_compat) != -1) {
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bus_number = cardbus_number;
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cardbus_number++;
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} else {
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#endif
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ih = OF_open(path);
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OF_call_method("load-ata", ih, 0, 0);
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OF_close(ih);
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OF_getprop(node, "AAPL,bus-id", &bus_number,
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sizeof(bus_number));
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#if PB3400_CARDBUS_HACK
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}
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#endif
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if (bus_number != 0xffffffff) {
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len = OF_package_to_path(node, path, sizeof(path));
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path[len] = 0;
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aprint_verbose("\n%s: fixing bus number to %d", path, bus_number);
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pci_decompose_tag(pc, tag, &bus, &dev, &fn);
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bi = pci_conf_read(pc, tag, PPB_REG_BUSINFO);
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bi &= 0xff000000;
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/* XXX subordinate is always 32 here */
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bi |= (bus & 0xff) | (bus_number << 8) | 0x200000;
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pci_conf_write(pc, tag, PPB_REG_BUSINFO, bi);
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}
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}
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/*
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* Find PCI IRQ of the node from OF tree.
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*/
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static int
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find_node_intr(int node, u_int32_t *addr, uint32_t *intr)
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{
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int parent, len, mlen, iparent;
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int match, i;
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u_int32_t map[160];
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const u_int32_t *mp;
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u_int32_t imapmask[8], maskedaddr[8];
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u_int32_t acells, icells;
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char name[32];
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/* XXXSL: 1st check for a interrupt-parent property */
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if (OF_getprop(node, "interrupt-parent", &iparent, sizeof(iparent)) == sizeof(iparent))
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{
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/* How many cells to specify an interrupt ?? */
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if (OF_getprop(iparent, "#interrupt-cells", &icells, 4) != 4)
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return -1;
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if (OF_getprop(node, "interrupts", &map, sizeof(map)) != (icells * 4))
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return -1;
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memcpy(intr, map, icells * 4);
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return (icells * 4);
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}
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parent = OF_parent(node);
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len = OF_getprop(parent, "interrupt-map", map, sizeof(map));
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mlen = OF_getprop(parent, "interrupt-map-mask", imapmask,
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sizeof(imapmask));
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if (mlen != -1)
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memcpy(maskedaddr, addr, mlen);
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again:
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if (len == -1 || mlen == -1)
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goto nomap;
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#ifdef DIAGNOSTIC
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if (mlen == sizeof(imapmask)) {
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aprint_error("interrupt-map too long\n");
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return -1;
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}
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#endif
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/* mask addr by "interrupt-map-mask" */
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for (i = 0; i < mlen / 4; i++)
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maskedaddr[i] &= imapmask[i];
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mp = map;
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i = 0;
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while (len > mlen) {
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match = memcmp(maskedaddr, mp, mlen);
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mp += mlen / 4;
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len -= mlen;
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/*
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* We must read "#address-cells" and "#interrupt-cells" each
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* time because each interrupt-parent may be different.
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*/
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iparent = *mp++;
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len -= 4;
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i = OF_getprop(iparent, "#address-cells", &acells, 4);
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if (i <= 0)
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acells = 0;
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else if (i != 4)
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return -1;
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if (OF_getprop(iparent, "#interrupt-cells", &icells, 4) != 4)
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return -1;
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/* Found. */
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if (match == 0) {
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/*
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* We matched on address/interrupt, but are we done?
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*/
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if (acells == 0) { /* XXX */
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/*
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* If we are at the interrupt controller,
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* we are finally done. Save the result and
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* return.
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*/
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memcpy(intr, mp, icells * 4);
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return icells * 4;
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}
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/*
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* We are now at an intermedia interrupt node. We
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* need to use its interrupt mask and map the
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* supplied address/interrupt via its map.
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*/
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mlen = OF_getprop(iparent, "interrupt-map-mask",
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imapmask, sizeof(imapmask));
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#ifdef DIAGNOSTIC
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if (mlen != (acells + icells)*4) {
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aprint_error("interrupt-map inconsistent (%d, %d)\n",
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mlen, (acells + icells)*4);
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return -1;
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}
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#endif
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memcpy(maskedaddr, mp, mlen);
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len = OF_getprop(iparent, "interrupt-map", map,
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sizeof(map));
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goto again;
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}
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mp += (acells + icells);
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len -= (acells + icells) * 4;
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}
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nomap:
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/*
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* If the node has no interrupt property and the parent is a
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* pci-bridge, use parent's interrupt. This occurs on a PCI
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* slot. (e.g. AHA-3940)
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*/
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memset(name, 0, sizeof(name));
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OF_getprop(parent, "name", name, sizeof(name));
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if (strcmp(name, "pci-bridge") == 0) {
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len = OF_getprop(parent, "AAPL,interrupts", intr, 4) ;
|
|
if (len == 4)
|
|
return len;
|
|
#if 0
|
|
/*
|
|
* XXX I don't know what is the correct local address.
|
|
* XXX Use the first entry for now.
|
|
*/
|
|
len = OF_getprop(parent, "interrupt-map", map, sizeof(map));
|
|
if (len >= 36) {
|
|
addr = &map[5];
|
|
return find_node_intr(parent, addr, intr);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* If all else fails, attempt to get AAPL, interrupts property.
|
|
* Grackle, at least, uses this instead of above in some cases.
|
|
*/
|
|
len = OF_getprop(node, "AAPL,interrupts", intr, 4) ;
|
|
if (len == 4)
|
|
return len;
|
|
|
|
return -1;
|
|
}
|