sys/arch/alpha/pci/mcpcia_pci.c

   1 /* $NetBSD: mcpcia_pci.c,v 1.7 2009/03/14 15:35:59 dsl Exp $ */
   2
   3 /*
   4  * Copyright (c) 1998 by Matthew Jacob
   5  * NASA AMES Research Center.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice immediately at the beginning of the file, without modification,
  13  *    this list of conditions, and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. The name of the author may not be used to endorse or promote products
  18  *    derived from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  24  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>                  /* RCS ID & Copyright macro defns */
  34
  35 __KERNEL_RCSID(0, "$NetBSD: mcpcia_pci.c,v 1.7 2009/03/14 15:35:59 dsl Exp $");
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/kernel.h>
  40 #include <sys/device.h>
  41
  42 #include <uvm/uvm_extern.h>
  43
  44 #include <dev/pci/pcireg.h>
  45 #include <dev/pci/pcivar.h>
  46 #include <alpha/pci/mcpciareg.h>
  47 #include <alpha/pci/mcpciavar.h>
  48
  49 #define KV(_addr)       ((void *)ALPHA_PHYS_TO_K0SEG((_addr)))
  50
  51 static void mcpcia_attach_hook(struct device *, struct device *,
  52         struct pcibus_attach_args *);
  53 static int
  54 mcpcia_bus_maxdevs(void *, int);
  55 static pcitag_t
  56 mcpcia_make_tag(void *, int, int, int);
  57 static void
  58 mcpcia_decompose_tag(void *, pcitag_t, int *, int *, int *);
  59 static pcireg_t
  60 mcpcia_conf_read(void *, pcitag_t, int);
  61 static void
  62 mcpcia_conf_write(void *, pcitag_t, int, pcireg_t);
  63
  64 void
  65 mcpcia_pci_init(pci_chipset_tag_t pc, void *v)
  66 {
  67         pc->pc_conf_v = v;
  68         pc->pc_attach_hook = mcpcia_attach_hook;
  69         pc->pc_bus_maxdevs = mcpcia_bus_maxdevs;
  70         pc->pc_make_tag = mcpcia_make_tag;
  71         pc->pc_decompose_tag = mcpcia_decompose_tag;
  72         pc->pc_conf_read = mcpcia_conf_read;
  73         pc->pc_conf_write = mcpcia_conf_write;
  74 }
  75
  76 static void
  77 mcpcia_attach_hook(struct device *parent, struct device *self, struct pcibus_attach_args *pba)
  78 {
  79 }
  80
  81 static int
  82 mcpcia_bus_maxdevs(void *cpv, int busno)
  83 {
  84         return (MCPCIA_MAXDEV);
  85 }
  86
  87 static pcitag_t
  88 mcpcia_make_tag(void *cpv, int b, int d, int f)
  89 {
  90         pcitag_t tag;
  91         tag = (b << 21) | (d << 16) | (f << 13);
  92         return (tag);
  93 }
  94
  95 static void
  96 mcpcia_decompose_tag(void *cpv, pcitag_t tag, int *bp, int *dp, int *fp)
  97 {
  98         if (bp != NULL)
  99                 *bp = (tag >> 21) & 0xff;
 100         if (dp != NULL)
 101                 *dp = (tag >> 16) & 0x1f;
 102         if (fp != NULL)
 103                 *fp = (tag >> 13) & 0x7;
 104 }
 105
 106 static pcireg_t
 107 mcpcia_conf_read(void *cpv, pcitag_t tag, int offset)
 108 {
 109         struct mcpcia_config *ccp = cpv;
 110         pcireg_t *dp, data = (pcireg_t) -1;
 111         unsigned long paddr;
 112
 113         /*
 114          * There's nothing in slot 0 on a primary bus- don't even try.
 115          */
 116         if ((tag >> 21) == 0 && ((u_int32_t) tag & 0x1f0000) == 0)
 117                 return (data);
 118
 119         if (ccp == NULL) {
 120                 panic("NULL ccp in mcpcia_conf_read");
 121         }
 122         paddr = (unsigned long) tag;
 123         paddr |= (3LL << 3);    /* 32 Bit PCI byte enables */
 124         paddr |= ((unsigned long) ((offset >> 2) << 7));
 125         paddr |= MCPCIA_PCI_CONF;
 126         paddr |= ccp->cc_sysbase;
 127         dp = (pcireg_t *)KV(paddr);
 128         if (badaddr(dp, sizeof (*dp)) == 0) {
 129                 data = *dp;
 130         }
 131         return (data);
 132 }
 133
 134 static void
 135 mcpcia_conf_write(void *cpv, pcitag_t tag, int offset, pcireg_t data)
 136 {
 137         struct mcpcia_config *ccp = cpv;
 138         pcireg_t *dp;
 139         unsigned long paddr;
 140
 141         /*
 142          * There's nothing in slot 0 on a primary bus- don't even try.
 143          */
 144         if ((tag >> 21) == 0 && ((u_int32_t) tag & 0x1f0000) == 0)
 145                 return;
 146
 147         if (ccp == NULL) {
 148                 panic("NULL ccp in mcpcia_conf_write");
 149         }
 150         paddr = (unsigned long) tag;
 151         paddr |= (3LL << 3);    /* 32 Bit PCI byte enables */
 152         paddr |= ((unsigned long) ((offset >> 2) << 7));
 153         paddr |= MCPCIA_PCI_CONF;
 154         paddr |= ccp->cc_sysbase;
 155
 156         dp = (pcireg_t *)KV(paddr);
 157         *dp = data;
 158 }