1 /*-
2 * Copyright (c) 2007 Bruce M. Simpson.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 /*
28 * Child driver for SDRAM/DDR controller core.
29 * Generally the OS should not need to access this device unless the
30 * firmware has not configured the SDRAM controller.
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD: releng/8.0/sys/mips/sentry5/siba_sdram.c 178173 2008-04-13 07:44:55Z imp $");
35
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/bus.h>
39 #include <sys/kernel.h>
40 #include <sys/module.h>
41 #include <sys/rman.h>
42 #include <sys/malloc.h>
43
44 #include <machine/bus.h>
45
46 #include <dev/siba/sibavar.h>
47 #include <dev/siba/sibareg.h>
48 #include <dev/siba/siba_ids.h>
49
50 static int siba_sdram_attach(device_t);
51 static int siba_sdram_probe(device_t);
52
53 static int
54 siba_sdram_probe(device_t dev)
55 {
56
57 if (siba_get_vendor(dev) == SIBA_VID_BROADCOM &&
58 siba_get_device(dev) == SIBA_DEVID_SDRAMDDR) {
59 device_set_desc(dev, "SDRAM/DDR core");
60 return (BUS_PROBE_DEFAULT);
61 }
62
63 return (ENXIO);
64 }
65
66 struct siba_sdram_softc {
67 void *notused;
68 };
69
70 static int
71 siba_sdram_attach(device_t dev)
72 {
73 //struct siba_sdram_softc *sc = device_get_softc(dev);
74 struct resource *mem;
75 int rid;
76
77 /*
78 * Allocate the resources which the parent bus has already
79 * determined for us.
80 * TODO: interrupt routing
81 */
82 #define MIPS_MEM_RID 0x20
83 rid = MIPS_MEM_RID;
84 mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
85 RF_ACTIVE);
86 if (mem == NULL) {
87 device_printf(dev, "unable to allocate memory\n");
88 return (ENXIO);
89 }
90
91 #if 0
92 device_printf(dev, "start %08lx size %04lx\n",
93 rman_get_start(mem), rman_get_size(mem));
94 #endif
95
96 return (0);
97 }
98
99 static device_method_t siba_sdram_methods[] = {
100 /* Device interface */
101 DEVMETHOD(device_attach, siba_sdram_attach),
102 DEVMETHOD(device_probe, siba_sdram_probe),
103
104 {0, 0},
105 };
106
107 static driver_t siba_sdram_driver = {
108 "siba_sdram",
109 siba_sdram_methods,
110 sizeof(struct siba_softc),
111 };
112 static devclass_t siba_sdram_devclass;
113
114 DRIVER_MODULE(siba_sdram, siba, siba_sdram_driver, siba_sdram_devclass, 0, 0);
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