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pciconf_ofmethod.c revision 1.1 
      1 /* $NetBSD: pciconf_ofmethod.c,v 1.1 2007/10/25 16:55:51 garbled 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 Jochen Kunz and 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 a PCI Bridge via the RTAS or
     41  * OF methods of the device.
     42  */
     43 
     44 #include <sys/cdefs.h>
     45 __KERNEL_RCSID(0, "$NetBSD: pciconf_ofmethod.c,v 1.1 2007/10/25 16:55:51 garbled 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 #include <dev/ofw/openfirm.h>
     61 #include <dev/ofw/ofw_pci.h>
     62 
     63 #if NISA > 0
     64 #include <dev/isa/isavar.h>
     65 #endif
     66 
     67 #include <dev/pci/pcivar.h>
     68 #include <dev/pci/pcireg.h>
     69 #include <dev/pci/pcidevs.h>
     70 
     71 void
     72 genppc_pci_ofmethod_attach_hook(struct device *parent, struct device *self,
     73     struct pcibus_attach_args *pba)
     74 {
     75 
     76 	if (pba->pba_bus != 0)
     77 		return;
     78 
     79 	aprint_normal(": OFW method configuration space access");
     80 }
     81 
     82 pcitag_t
     83 genppc_pci_ofmethod_make_tag(void *v, int bus, int dev, int func)
     84 {
     85 	return ((bus << OFW_PCI_PHYS_HI_BUSSHIFT) & OFW_PCI_PHYS_HI_BUSMASK) |
     86 	    ((dev << OFW_PCI_PHYS_HI_DEVICESHIFT) & OFW_PCI_PHYS_HI_DEVICEMASK)|
     87 	    ((func << OFW_PCI_PHYS_HI_FUNCTIONSHIFT) &
     88 	    OFW_PCI_PHYS_HI_FUNCTIONMASK);
     89 }
     90 
     91 void
     92 genppc_pci_ofmethod_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp,
     93     int *fp)
     94 {
     95 
     96 	if (bp != NULL)
     97 		*bp = OFW_PCI_PHYS_HI_BUS(tag);
     98 	if (dp != NULL)
     99 		*dp = OFW_PCI_PHYS_HI_DEVICE(tag);
    100 	if (fp != NULL)
    101 		*fp = OFW_PCI_PHYS_HI_FUNCTION(tag);
    102 	return;
    103 }
    104 
    105 pcireg_t
    106 genppc_pci_ofmethod_conf_read(void *v, pcitag_t tag, int reg)
    107 {
    108 	pci_chipset_tag_t pc = (pci_chipset_tag_t)v;
    109 	pcireg_t data;
    110 
    111 	tag &= OFW_PCI_PHYS_HI_BUSMASK | OFW_PCI_PHYS_HI_DEVICEMASK |
    112 	    OFW_PCI_PHYS_HI_FUNCTIONMASK;
    113 	tag |= reg & OFW_PCI_PHYS_HI_REGISTERMASK;
    114 	if (OF_call_method("config-l@", pc->pc_ihandle, 1, 1, tag, &data) < 0)
    115 		return (pcireg_t) -1;
    116 	/*printf("data=0x%x\n", data); */
    117 	return data;
    118 }
    119 
    120 void
    121 genppc_pci_ofmethod_conf_write(void *v, pcitag_t tag, int reg, pcireg_t data)
    122 {
    123 	pci_chipset_tag_t pc = (pci_chipset_tag_t)v;
    124 
    125 	tag &= OFW_PCI_PHYS_HI_BUSMASK | OFW_PCI_PHYS_HI_DEVICEMASK |
    126 	    OFW_PCI_PHYS_HI_FUNCTIONMASK;
    127 	tag |= reg & OFW_PCI_PHYS_HI_REGISTERMASK;
    128 	OF_call_method("config-l!", pc->pc_ihandle, 2, 0, data, tag);
    129 }
    130