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      1 /*	$NetBSD: iq80321_pci.c,v 1.10 2018/11/16 15:06:23 jmcneill 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 1.10 2018/11/16 15:06:23 jmcneill Exp $");
     44 
     45 #include <sys/param.h>
     46 #include <sys/systm.h>
     47 #include <sys/device.h>
     48 #include <sys/bus.h>
     49 
     50 #include <dev/pci/pcidevs.h>
     51 #include <dev/pci/ppbreg.h>
     52 
     53 #include <arm/locore.h>
     54 
     55 #include <machine/autoconf.h>
     56 
     57 #include <evbarm/iq80321/iq80321reg.h>
     58 #include <evbarm/iq80321/iq80321var.h>
     59 
     60 #include <arm/xscale/i80321reg.h>
     61 #include <arm/xscale/i80321var.h>
     62 
     63 int	iq80321_pci_intr_map(const struct pci_attach_args *,
     64 	    pci_intr_handle_t *);
     65 const char *iq80321_pci_intr_string(void *, pci_intr_handle_t, char *, size_t);
     66 const struct evcnt *iq80321_pci_intr_evcnt(void *, pci_intr_handle_t);
     67 void	*iq80321_pci_intr_establish(void *, pci_intr_handle_t,
     68 	    int, int (*func)(void *), void *, const char *);
     69 void	iq80321_pci_intr_disestablish(void *, void *);
     70 
     71 void
     72 iq80321_pci_init(pci_chipset_tag_t pc, void *cookie)
     73 {
     74 
     75 	pc->pc_intr_v = cookie;		/* the i80321 softc */
     76 	pc->pc_intr_map = iq80321_pci_intr_map;
     77 	pc->pc_intr_string = iq80321_pci_intr_string;
     78 	pc->pc_intr_evcnt = iq80321_pci_intr_evcnt;
     79 	pc->pc_intr_establish = iq80321_pci_intr_establish;
     80 	pc->pc_intr_disestablish = iq80321_pci_intr_disestablish;
     81 }
     82 
     83 int
     84 iq80321_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp)
     85 {
     86 	struct i80321_softc *sc = pa->pa_pc->pc_intr_v;
     87 	int b, d, f;
     88 	uint32_t busno;
     89 
     90 	/*
     91 	 * The IQ80321's interrupts are routed like so:
     92 	 *
     93 	 *	XINT0	i82544 Gig-E
     94 	 *
     95 	 *	XINT1	UART
     96 	 *
     97 	 *	XINT2	INTA# from S-PCI-X slot
     98 	 *
     99 	 *	XINT3	INTB# from S-PCI-X slot
    100 	 */
    101 
    102 	busno = bus_space_read_4(sc->sc_st, sc->sc_atu_sh, ATU_PCIXSR);
    103 	busno = PCIXSR_BUSNO(busno);
    104 	if (busno == 0xff)
    105 		busno = 0;
    106 
    107 	pci_decompose_tag(pa->pa_pc, pa->pa_intrtag, &b, &d, &f);
    108 
    109 	/* No mappings for devices not on our bus. */
    110 	if (b != busno)
    111 		goto no_mapping;
    112 
    113 	switch (d) {
    114 	case 4:			/* i82544 Gig-E */
    115 		if (pa->pa_intrpin == 1) {
    116 			*ihp = ICU_INT_XINT(0);
    117 			return (0);
    118 		}
    119 		goto no_mapping;
    120 
    121 	case 6:			/* S-PCI-X slot */
    122 		if (pa->pa_intrpin == 1) {
    123 			*ihp = ICU_INT_XINT(2);
    124 			return (0);
    125 		}
    126 		if (pa->pa_intrpin == 2) {
    127 			*ihp = ICU_INT_XINT(3);
    128 			return (0);
    129 		}
    130 		goto no_mapping;
    131 
    132 	default:
    133  no_mapping:
    134 		printf("iq80321_pci_intr_map: no mapping for %d/%d/%d\n",
    135 		    pa->pa_bus, pa->pa_device, pa->pa_function);
    136 		return (1);
    137 	}
    138 
    139 	return (0);
    140 }
    141 
    142 const char *
    143 iq80321_pci_intr_string(void *v, pci_intr_handle_t ih, char *buf, size_t len)
    144 {
    145 
    146 	strlcpy(buf, i80321_irqnames[ih], len);
    147 	return buf;
    148 }
    149 
    150 const struct evcnt *
    151 iq80321_pci_intr_evcnt(void *v, pci_intr_handle_t ih)
    152 {
    153 
    154 	/* XXX For now. */
    155 	return (NULL);
    156 }
    157 
    158 void *
    159 iq80321_pci_intr_establish(void *v, pci_intr_handle_t ih, int ipl,
    160     int (*func)(void *), void *arg, const char *xname)
    161 {
    162 
    163 	return (i80321_intr_establish(ih, ipl, func, arg));
    164 }
    165 
    166 void
    167 iq80321_pci_intr_disestablish(void *v, void *cookie)
    168 {
    169 
    170 	i80321_intr_disestablish(cookie);
    171 }
    172