sys/arch/evbarm/iq80321/iq80321_pci.c

   1 /*      $NetBSD: iq80321_pci.c,v 1.3.2.3 2004/09/21 13:14:48 skrll Exp $        */
   2
   3 /*
   4  * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, 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. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project by
  20  *      Wasabi Systems, Inc.
  21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  22  *    or promote products derived from this software without specific prior
  23  *    written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 /*
  39  * IQ80321 PCI interrupt support.
  40  */
  41
  42 #include <sys/cdefs.h>
  43 __KERNEL_RCSID(0, "$NetBSD: iq80321_pci.c,v 1.3.2.3 2004/09/21 13:14:48 skrll Exp $");
  44
  45 #include <sys/param.h>
  46 #include <sys/systm.h>
  47 #include <sys/device.h>
  48
  49 #include <machine/autoconf.h>
  50 #include <machine/bus.h>
  51
  52 #include <evbarm/iq80321/iq80321reg.h>
  53 #include <evbarm/iq80321/iq80321var.h>
  54
  55 #include <arm/xscale/i80321reg.h>
  56 #include <arm/xscale/i80321var.h>
  57
  58 #include <dev/pci/pcidevs.h>
  59 #include <dev/pci/ppbreg.h>
  60
  61 int     iq80321_pci_intr_map(struct pci_attach_args *, pci_intr_handle_t *);
  62 const char *iq80321_pci_intr_string(void *, pci_intr_handle_t);
  63 const struct evcnt *iq80321_pci_intr_evcnt(void *, pci_intr_handle_t);
  64 void    *iq80321_pci_intr_establish(void *, pci_intr_handle_t,
  65             int, int (*func)(void *), void *);
  66 void    iq80321_pci_intr_disestablish(void *, void *);
  67
  68 void
  69 iq80321_pci_init(pci_chipset_tag_t pc, void *cookie)
  70 {
  71
  72         pc->pc_intr_v = cookie;         /* the i80321 softc */
  73         pc->pc_intr_map = iq80321_pci_intr_map;
  74         pc->pc_intr_string = iq80321_pci_intr_string;
  75         pc->pc_intr_evcnt = iq80321_pci_intr_evcnt;
  76         pc->pc_intr_establish = iq80321_pci_intr_establish;
  77         pc->pc_intr_disestablish = iq80321_pci_intr_disestablish;
  78 }
  79
  80 int
  81 iq80321_pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp)
  82 {
  83         struct i80321_softc *sc = pa->pa_pc->pc_intr_v;
  84         int b, d, f;
  85         uint32_t busno;
  86
  87         /*
  88          * The IQ80321's interrupts are routed like so:
  89          *
  90          *      XINT0   i82544 Gig-E
  91          *
  92          *      XINT1   UART
  93          *
  94          *      XINT2   INTA# from S-PCI-X slot
  95          *
  96          *      XINT3   INTB# from S-PCI-X slot
  97          */
  98
  99         busno = bus_space_read_4(sc->sc_st, sc->sc_atu_sh, ATU_PCIXSR);
 100         busno = PCIXSR_BUSNO(busno);
 101         if (busno == 0xff)
 102                 busno = 0;
 103
 104         pci_decompose_tag(pa->pa_pc, pa->pa_intrtag, &b, &d, &f);
 105
 106         /* No mappings for devices not on our bus. */
 107         if (b != busno)
 108                 goto no_mapping;
 109
 110         switch (d) {
 111         case 4:                 /* i82544 Gig-E */
 112                 if (pa->pa_intrpin == 1) {
 113                         *ihp = ICU_INT_XINT(0);
 114                         return (0);
 115                 }
 116                 goto no_mapping;
 117
 118         case 6:                 /* S-PCI-X slot */
 119                 if (pa->pa_intrpin == 1) {
 120                         *ihp = ICU_INT_XINT(2);
 121                         return (0);
 122                 }
 123                 if (pa->pa_intrpin == 2) {
 124                         *ihp = ICU_INT_XINT(3);
 125                         return (0);
 126                 }
 127                 goto no_mapping;
 128
 129         default:
 130  no_mapping:
 131                 printf("iq80321_pci_intr_map: no mapping for %d/%d/%d\n",
 132                     pa->pa_bus, pa->pa_device, pa->pa_function);
 133                 return (1);
 134         }
 135
 136         return (0);
 137 }
 138
 139 const char *
 140 iq80321_pci_intr_string(void *v, pci_intr_handle_t ih)
 141 {
 142
 143         return (i80321_irqnames[ih]);
 144 }
 145
 146 const struct evcnt *
 147 iq80321_pci_intr_evcnt(void *v, pci_intr_handle_t ih)
 148 {
 149
 150         /* XXX For now. */
 151         return (NULL);
 152 }
 153
 154 void *
 155 iq80321_pci_intr_establish(void *v, pci_intr_handle_t ih, int ipl,
 156     int (*func)(void *), void *arg)
 157 {
 158
 159         return (i80321_intr_establish(ih, ipl, func, arg));
 160 }
 161
 162 void
 163 iq80321_pci_intr_disestablish(void *v, void *cookie)
 164 {
 165
 166         i80321_intr_disestablish(cookie);
 167 }