sys/arch/powerpc/pci/pciconf_ofmethod.c

   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  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * Generic PowerPC functions for talking to a PCI Bridge via the RTAS or
  34  * OF methods of the device.
  35  */
  36
  37 #include <sys/cdefs.h>
  38 __KERNEL_RCSID(0, "$NetBSD: pciconf_ofmethod.c,v 1.1 2007/10/25 16:55:51 garbled Exp $");
  39
  40 #include <sys/types.h>
  41 #include <sys/param.h>
  42 #include <sys/time.h>
  43 #include <sys/systm.h>
  44 #include <sys/errno.h>
  45 #include <sys/device.h>
  46
  47 #include <uvm/uvm_extern.h>
  48
  49 #define _POWERPC_BUS_DMA_PRIVATE
  50 #include <machine/bus.h>
  51 #include <machine/intr.h>
  52 #include <machine/pio.h>
  53 #include <dev/ofw/openfirm.h>
  54 #include <dev/ofw/ofw_pci.h>
  55
  56 #if NISA > 0
  57 #include <dev/isa/isavar.h>
  58 #endif
  59
  60 #include <dev/pci/pcivar.h>
  61 #include <dev/pci/pcireg.h>
  62 #include <dev/pci/pcidevs.h>
  63
  64 void
  65 genppc_pci_ofmethod_attach_hook(struct device *parent, struct device *self,
  66     struct pcibus_attach_args *pba)
  67 {
  68
  69         if (pba->pba_bus != 0)
  70                 return;
  71
  72         aprint_normal(": OFW method configuration space access");
  73 }
  74
  75 pcitag_t
  76 genppc_pci_ofmethod_make_tag(void *v, int bus, int dev, int func)
  77 {
  78         return ((bus << OFW_PCI_PHYS_HI_BUSSHIFT) & OFW_PCI_PHYS_HI_BUSMASK) |
  79             ((dev << OFW_PCI_PHYS_HI_DEVICESHIFT) & OFW_PCI_PHYS_HI_DEVICEMASK)|
  80             ((func << OFW_PCI_PHYS_HI_FUNCTIONSHIFT) &
  81             OFW_PCI_PHYS_HI_FUNCTIONMASK);
  82 }
  83
  84 void
  85 genppc_pci_ofmethod_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp,
  86     int *fp)
  87 {
  88
  89         if (bp != NULL)
  90                 *bp = OFW_PCI_PHYS_HI_BUS(tag);
  91         if (dp != NULL)
  92                 *dp = OFW_PCI_PHYS_HI_DEVICE(tag);
  93         if (fp != NULL)
  94                 *fp = OFW_PCI_PHYS_HI_FUNCTION(tag);
  95         return;
  96 }
  97
  98 pcireg_t
  99 genppc_pci_ofmethod_conf_read(void *v, pcitag_t tag, int reg)
 100 {
 101         pci_chipset_tag_t pc = (pci_chipset_tag_t)v;
 102         pcireg_t data;
 103
 104         tag &= OFW_PCI_PHYS_HI_BUSMASK | OFW_PCI_PHYS_HI_DEVICEMASK |
 105             OFW_PCI_PHYS_HI_FUNCTIONMASK;
 106         tag |= reg & OFW_PCI_PHYS_HI_REGISTERMASK;
 107         if (OF_call_method("config-l@", pc->pc_ihandle, 1, 1, tag, &data) < 0)
 108                 return (pcireg_t) -1;
 109         /*printf("data=0x%x\n", data); */
 110         return data;
 111 }
 112
 113 void
 114 genppc_pci_ofmethod_conf_write(void *v, pcitag_t tag, int reg, pcireg_t data)
 115 {
 116         pci_chipset_tag_t pc = (pci_chipset_tag_t)v;
 117
 118         tag &= OFW_PCI_PHYS_HI_BUSMASK | OFW_PCI_PHYS_HI_DEVICEMASK |
 119             OFW_PCI_PHYS_HI_FUNCTIONMASK;
 120         tag |= reg & OFW_PCI_PHYS_HI_REGISTERMASK;
 121         OF_call_method("config-l!", pc->pc_ihandle, 2, 0, data, tag);
 122 }