1 /* $NetBSD: geode.c,v 1.17 2021/08/07 16:18:55 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2005 David Young. All rights reserved.
5 *
6 * This code was written by David Young and merged with geodecntr code
7 * by Frank Kardel.
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 *
18 * THIS SOFTWARE IS PROVIDED BY DAVID YOUNG ``AS IS'' AND ANY
19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
21 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DAVID
22 * YOUNG BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
24 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
29 * OF SUCH DAMAGE.
30 */
31 /*-
32 * Copyright (c) 2002 The NetBSD Foundation, Inc.
33 * All rights reserved.
34 *
35 * This code is derived from software contributed to The NetBSD Foundation
36 * by Jason R. Thorpe.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
48 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
49 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
50 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
51 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
52 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
53 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
54 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
55 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
56 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
57 * POSSIBILITY OF SUCH DAMAGE.
58 */
59
60 /*
61 * Device driver for the special devices attached to the GBA (watchdog, high
62 * resolution counter, ...) in the AMD Geode SC1100 processor.
63 */
64
65 #include <sys/cdefs.h>
66
67 __KERNEL_RCSID(0, "$NetBSD: geode.c,v 1.17 2021/08/07 16:18:55 thorpej Exp $");
68
69 #include <sys/param.h>
70 #include <sys/systm.h>
71 #include <sys/device.h>
72 #include <sys/wdog.h>
73 #include <uvm/uvm_extern.h>
74 #include <sys/bus.h>
75 #include <dev/pci/pcivar.h>
76 #include <dev/pci/pcidevs.h>
77 #include <arch/i386/pci/geodevar.h>
78 #include <arch/i386/pci/geodereg.h>
79 #include <dev/sysmon/sysmonvar.h>
80
81 #ifdef GEODE_DEBUG
82 #define GEODE_DPRINTF(__x) printf __x
83 #else /* GEODE_DEBUG */
84 #define GEODE_DPRINTF(__x) /* nothing */
85 #endif
86
87 static int
geode_gcb_match(device_t parent,cfdata_t match,void * aux)88 geode_gcb_match(device_t parent, cfdata_t match, void *aux)
89 {
90 struct pci_attach_args *pa = aux;
91
92 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_NS &&
93 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_NS_SC1100_XBUS)
94 return (10); /* XXX beat pchb? -dyoung */
95
96 return (0);
97 }
98
99 static void
geode_gcb_attach(device_t parent,device_t self,void * aux)100 geode_gcb_attach(device_t parent, device_t self, void *aux)
101 {
102 struct geode_gcb_softc *sc = device_private(self);
103 struct pci_attach_args *pa = aux;
104 uint32_t cba;
105 u_int rev;
106
107 cba = pci_conf_read(pa->pa_pc, pa->pa_tag, SC1100_XBUS_CBA_SCRATCHPAD);
108 sc->sc_iot = pa->pa_iot;
109 if (bus_space_map(sc->sc_iot, (bus_addr_t)cba, SC1100_GCB_SIZE, 0,
110 &sc->sc_ioh) != 0) {
111 aprint_error(": unable to map registers\n");
112 return;
113 }
114
115 GEODE_DPRINTF(("%s: mapped %u bytes at %#08" PRIx32 "\n",
116 device_xname(self), SC1100_GCB_SIZE, cba));
117
118 rev = bus_space_read_1(sc->sc_iot, sc->sc_ioh, SC1100_GCB_REV_B);
119
120 aprint_naive("\n");
121 aprint_normal(": AMD Geode GCB (rev. 0x%02x)\n", rev);
122
123 while (config_found(self, NULL, NULL, CFARGS_NONE) != NULL)
124 /* empty */;
125 }
126 static int
geode_gcb_detach(device_t self,int flags)127 geode_gcb_detach(device_t self, int flags)
128 {
129 int rc;
130 struct geode_gcb_softc *sc = device_private(self);
131
132 if ((rc = config_detach_children(self, flags)) != 0)
133 return rc;
134
135 bus_space_unmap(sc->sc_iot, sc->sc_ioh, SC1100_GCB_SIZE);
136 return 0;
137 }
138
139 static void
geode_gcb_childdetached(device_t parent,device_t child)140 geode_gcb_childdetached(device_t parent, device_t child)
141 {
142 /* We hold no references to child devices, so there is nothing
143 * to do.
144 */
145 }
146
147 CFATTACH_DECL2_NEW(geodegcb, sizeof(struct geode_gcb_softc),
148 geode_gcb_match, geode_gcb_attach, geode_gcb_detach, NULL, NULL,
149 geode_gcb_childdetached);
150