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
iq80321_pci_init(pci_chipset_tag_t pc,void * cookie)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
iq80321_pci_intr_map(const struct pci_attach_args * pa,pci_intr_handle_t * ihp)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 *
iq80321_pci_intr_string(void * v,pci_intr_handle_t ih,char * buf,size_t len)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 *
iq80321_pci_intr_evcnt(void * v,pci_intr_handle_t ih)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 *
iq80321_pci_intr_establish(void * v,pci_intr_handle_t ih,int ipl,int (* func)(void *),void * arg,const char * xname)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
iq80321_pci_intr_disestablish(void * v,void * cookie)167 iq80321_pci_intr_disestablish(void *v, void *cookie)
168 {
169
170 i80321_intr_disestablish(cookie);
171 }
172