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iq31244_pci.c revision 1.2 
      1 /*	$NetBSD: iq31244_pci.c,v 1.2 2003/07/15 00:25:01 lukem Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2001, 2002, 2003 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  * IQ31244 PCI interrupt support.
     40  */
     41 
     42 #include <sys/cdefs.h>
     43 __KERNEL_RCSID(0, "$NetBSD: iq31244_pci.c,v 1.2 2003/07/15 00:25:01 lukem 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 	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 1:			/* PCIX-PCIX bridge */
    100 		/*
    101 		 * The S-ATA chips are behind the bridge, and all of
    102 		 * the S-ATA interrupts are wired together.
    103 		 */
    104 		*ihp = ICU_INT_XINT(2);
    105 		return (0);
    106 
    107 	case 2:			/* PCI slot */
    108 		/* All pins are wired together. */
    109 		*ihp = ICU_INT_XINT(3);
    110 		return (0);
    111 
    112 	case 3:			/* i82546 dual Gig-E */
    113 		if (pa->pa_intrpin == 1 || pa->pa_intrpin == 2) {
    114 			*ihp = ICU_INT_XINT(0);
    115 			return (0);
    116 		}
    117 		goto no_mapping;
    118 
    119 	default:
    120  no_mapping:
    121 		printf("iq80321_pci_intr_map: no mapping for %d/%d/%d/%c\n",
    122 		    pa->pa_bus, pa->pa_device, pa->pa_function,
    123 		    '@' + pa->pa_intrpin);
    124 		return (1);
    125 	}
    126 
    127 	return (0);
    128 }
    129 
    130 const char *
    131 iq80321_pci_intr_string(void *v, pci_intr_handle_t ih)
    132 {
    133 
    134 	return (i80321_irqnames[ih]);
    135 }
    136 
    137 const struct evcnt *
    138 iq80321_pci_intr_evcnt(void *v, pci_intr_handle_t ih)
    139 {
    140 
    141 	/* XXX For now. */
    142 	return (NULL);
    143 }
    144 
    145 void *
    146 iq80321_pci_intr_establish(void *v, pci_intr_handle_t ih, int ipl,
    147     int (*func)(void *), void *arg)
    148 {
    149 
    150 	return (i80321_intr_establish(ih, ipl, func, arg));
    151 }
    152 
    153 void
    154 iq80321_pci_intr_disestablish(void *v, void *cookie)
    155 {
    156 
    157 	i80321_intr_disestablish(cookie);
    158 }
    159