xref: /freebsd/sys/powerpc/mpc85xx/isa.c (revision 2b15cb3d0922bd70ea592f0da9b4a5b167f4d53f)
1 /*-
2  * Copyright (c) 2009 Marcel Moolenaar
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1. Redistributions of source code must retain the above copyright
8  *    notice, this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright
10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
18  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
20  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
21  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23  * SUCH DAMAGE.
24  */
25 
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
28 
29 #include <sys/param.h>
30 #include <sys/bus.h>
31 #include <sys/malloc.h>
32 #include <machine/bus.h>
33 #include <sys/rman.h>
34 
35 #include <machine/intr_machdep.h>
36 #include <machine/resource.h>
37 
38 #include <isa/isareg.h>
39 #include <isa/isavar.h>
40 #include <isa/isa_common.h>
41 
42 void
43 isa_init(device_t dev)
44 {
45 }
46 
47 struct resource *
48 isa_alloc_resource(device_t bus, device_t child, int type, int *rid,
49     u_long start, u_long end, u_long count, u_int flags)
50 {
51 	struct isa_device* idev = DEVTOISA(child);
52 	struct resource_list *rl = &idev->id_resources;
53 	int isdefault, passthrough, rids;
54 
55 	isdefault = (start == 0UL && end == ~0UL) ? 1 : 0;
56 	passthrough = (device_get_parent(child) != bus) ? 1 : 0;
57 
58 	if (!passthrough && !isdefault &&
59 	    resource_list_find(rl, type, *rid) == NULL) {
60 		switch (type) {
61 		case SYS_RES_IOPORT:	rids = ISA_PNP_NPORT; break;
62 		case SYS_RES_IRQ:	rids = ISA_PNP_NIRQ; break;
63 		case SYS_RES_MEMORY:	rids = ISA_PNP_NMEM; break;
64 		default:		rids = 0; break;
65 		}
66 		if (*rid < 0 || *rid >= rids)
67 			return (NULL);
68 
69 		resource_list_add(rl, type, *rid, start, end, count);
70 	}
71 
72 	return (resource_list_alloc(rl, bus, child, type, rid, start, end,
73 	    count, flags));
74 }
75 
76 int
77 isa_release_resource(device_t bus, device_t child, int type, int rid,
78     struct resource *r)
79 {
80 	struct isa_device* idev = DEVTOISA(child);
81 	struct resource_list *rl = &idev->id_resources;
82 
83 	return (resource_list_release(rl, bus, child, type, rid, r));
84 }
85