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pciconf_indirect.c revision 1.1.2.2 
      1 /* $NetBSD: pciconf_indirect.c,v 1.1.2.2 2007/05/06 05:11:42 macallan Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2007 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Tim Rightnour
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 /*
     40  * Generic PowerPC functions for talking to an indirect configuration style
     41  * PCI Bridge.
     42  */
     43 
     44 #include <sys/cdefs.h>
     45 __KERNEL_RCSID(0, "$NetBSD: pciconf_indirect.c,v 1.1.2.2 2007/05/06 05:11:42 macallan Exp $");
     46 
     47 #include <sys/types.h>
     48 #include <sys/param.h>
     49 #include <sys/time.h>
     50 #include <sys/systm.h>
     51 #include <sys/errno.h>
     52 #include <sys/device.h>
     53 
     54 #include <uvm/uvm_extern.h>
     55 
     56 #define _POWERPC_BUS_DMA_PRIVATE
     57 #include <machine/bus.h>
     58 #include <machine/intr.h>
     59 #include <machine/pio.h>
     60 #ifdef prep
     61 #include <machine/platform.h>
     62 #endif
     63 
     64 #if NISA > 0
     65 #include <dev/isa/isavar.h>
     66 #endif
     67 
     68 #include <dev/pci/pcivar.h>
     69 #include <dev/pci/pcireg.h>
     70 #include <dev/pci/pcidevs.h>
     71 
     72 #define	PCI_MODE1_ENABLE	0x80000000UL
     73 
     74 void genppc_pci_indirect_attach_hook(struct device *, struct device *,
     75     struct pcibus_attach_args *);
     76 pcitag_t genppc_pci_indirect_make_tag(void *, int, int, int);
     77 pcireg_t genppc_pci_indirect_conf_read(void *, pcitag_t, int);
     78 void genppc_pci_indirect_conf_write(void *, pcitag_t, int, pcireg_t);
     79 void genppc_pci_indirect_decompose_tag(void *, pcitag_t, int *, int *, int *);
     80 
     81 void
     82 genppc_pci_indirect_attach_hook(struct device *parent, struct device *self,
     83     struct pcibus_attach_args *pba)
     84 {
     85 
     86 	if (pba->pba_bus != 0)
     87 		return;
     88 
     89 	printf(": indirect configuration space access");
     90 }
     91 
     92 pcitag_t
     93 genppc_pci_indirect_make_tag(void *v, int bus, int device, int function)
     94 {
     95 	pcitag_t tag;
     96 
     97 	if (bus >= 256 || device >= 32 || function >= 8)
     98 		panic("pci_make_tag: bad request");
     99 
    100 	tag = PCI_MODE1_ENABLE |
    101 		    (bus << 16) | (device << 11) | (function << 8);
    102 	return tag;
    103 }
    104 
    105 void
    106 genppc_pci_indirect_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp,
    107     int *fp)
    108 {
    109 
    110 	if (bp != NULL)
    111 		*bp = (tag >> 16) & 0xff;
    112 	if (dp != NULL)
    113 		*dp = (tag >> 11) & 0x1f;
    114 	if (fp != NULL)
    115 		*fp = (tag >> 8) & 0x7;
    116 	return;
    117 }
    118 
    119 pcireg_t
    120 genppc_pci_indirect_conf_read(void *v, pcitag_t tag, int reg)
    121 {
    122 	pci_chipset_tag_t pc = (pci_chipset_tag_t)v;
    123 	pcireg_t data;
    124 	int s;
    125 
    126 	s = splhigh();
    127 	out32rb(pc->pc_addr, tag | reg);
    128 	data = in32rb(pc->pc_data);
    129 	out32rb(pc->pc_addr, 0);
    130 	splx(s);
    131 
    132 	return data;
    133 }
    134 
    135 void
    136 genppc_pci_indirect_conf_write(void *v, pcitag_t tag, int reg, pcireg_t data)
    137 {
    138 	pci_chipset_tag_t pc = (pci_chipset_tag_t)v;
    139 	int s;
    140 
    141 	s = splhigh();
    142 	out32rb(pc->pc_addr, tag | reg);
    143 	out32rb(pc->pc_data, data);
    144 	out32rb(pc->pc_addr, 0);
    145 	splx(s);
    146 }
    147