sys/arch/evbarm/cp3100/cp3100_pci.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright 2006 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Steve C. Woodford 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  * CP3100 PCI interrupt support.
  40  */
  41
  42 #include <sys/cdefs.h>
  43 __KERNEL_RCSID(0, "$NetBSD$");
  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         busno = bus_space_read_4(sc->sc_st, sc->sc_atu_sh, ATU_PCIXSR);
  88         busno = PCIXSR_BUSNO(busno);
  89         if (busno == 0xff)
  90                 busno = 0;
  91
  92         pci_decompose_tag(pa->pa_pc, pa->pa_intrtag, &b, &d, &f);
  93
  94         /* No mappings for devices not on our bus. */
  95         if (b != busno)
  96                 goto no_mapping;
  97
  98         switch (d) {
  99         case 0:                 /* i82546EB Dual GigE */
 100                 /*
 101                  * This is a dual-function chip which uses INTA and INTB,
 102                  * connected to XINT0 and XINT1 respectively.
 103                  */
 104                 if (f != 0 && f != 1)
 105                         goto no_mapping;
 106                 *ihp = ICU_INT_XINT(f);
 107                 return (0);
 108
 109         case 1:                 /* i31244 S-ATA Interface */
 110                 *ihp = ICU_INT_XINT(2);
 111                 return (0);
 112
 113         case 2:                 /* Symbios Logic 53c1010 SCSI Controllers */
 114         case 3:
 115                 /*
 116                  * Both controllers share a single pin
 117                  */
 118                 *ihp = ICU_INT_XINT(3);
 119                 return (0);
 120
 121         default:
 122  no_mapping:
 123                 printf("iq80321_pci_intr_map: no mapping for %d/%d/%d/%c\n",
 124                     pa->pa_bus, pa->pa_device, pa->pa_function,
 125                     '@' + pa->pa_intrpin);
 126                 return (1);
 127         }
 128
 129         return (0);
 130 }
 131
 132 const char *
 133 iq80321_pci_intr_string(void *v, pci_intr_handle_t ih)
 134 {
 135
 136         return (i80321_irqnames[ih]);
 137 }
 138
 139 const struct evcnt *
 140 iq80321_pci_intr_evcnt(void *v, pci_intr_handle_t ih)
 141 {
 142
 143         /* XXX For now. */
 144         return (NULL);
 145 }
 146
 147 void *
 148 iq80321_pci_intr_establish(void *v, pci_intr_handle_t ih, int ipl,
 149     int (*func)(void *), void *arg)
 150 {
 151
 152         return (i80321_intr_establish(ih, ipl, func, arg));
 153 }
 154
 155 void
 156 iq80321_pci_intr_disestablish(void *v, void *cookie)
 157 {
 158
 159         i80321_intr_disestablish(cookie);
 160 }