2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2008 Marius Strobl <marius@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
37 #include <sys/resource.h>
40 #include <dev/ofw/ofw_bus.h>
42 #include <machine/bus.h>
43 #include <machine/resource.h>
46 #include <sparc64/pci/ofw_pci.h>
49 #define JBUSPPM_NREG 2
51 #define JBUSPPM_DEVID 0
52 #define JBUSPPM_ESTAR 1
54 #define JBUSPPM_DEVID_JID 0x00
55 #define JBUSPPM_DEVID_JID_MASTER 0x00040000
57 #define JBUSPPM_ESTAR_CTRL 0x00
58 #define JBUSPPM_ESTAR_CTRL_1 0x00000001
59 #define JBUSPPM_ESTAR_CTRL_2 0x00000002
60 #define JBUSPPM_ESTAR_CTRL_32 0x00000020
61 #define JBUSPPM_ESTAR_CTRL_MASK \
62 (JBUSPPM_ESTAR_CTRL_1 | JBUSPPM_ESTAR_CTRL_2 | JBUSPPM_ESTAR_CTRL_32)
63 #define JBUSPPM_ESTAR_JCHNG 0x08
64 #define JBUSPPM_ESTAR_JCHNG_DELAY_MASK 0x00000007
65 #define JBUSPPM_ESTAR_JCHNG_START 0x00000010
66 #define JBUSPPM_ESTAR_JCHNG_OCCURED 0x00000018
68 struct jbusppm_softc {
69 struct resource *sc_res[JBUSPPM_NREG];
70 bus_space_tag_t sc_bt[JBUSPPM_NREG];
71 bus_space_handle_t sc_bh[JBUSPPM_NREG];
74 #define JBUSPPM_READ(sc, reg, off) \
75 bus_space_read_8((sc)->sc_bt[(reg)], (sc)->sc_bh[(reg)], (off))
76 #define JBUSPPM_WRITE(sc, reg, off, val) \
77 bus_space_write_8((sc)->sc_bt[(reg)], (sc)->sc_bh[(reg)], (off), (val))
79 static device_probe_t jbusppm_probe;
80 static device_attach_t jbusppm_attach;
82 static device_method_t jbusppm_methods[] = {
83 /* Device interface */
84 DEVMETHOD(device_probe, jbusppm_probe),
85 DEVMETHOD(device_attach, jbusppm_attach),
90 static devclass_t jbusppm_devclass;
92 DEFINE_CLASS_0(jbusppm, jbusppm_driver, jbusppm_methods,
93 sizeof(struct jbusppm_softc));
94 DRIVER_MODULE(jbusppm, nexus, jbusppm_driver, jbusppm_devclass, 0, 0);
97 jbusppm_probe(device_t dev)
101 compat = ofw_bus_get_compat(dev);
102 if (compat != NULL && strcmp(ofw_bus_get_name(dev), "ppm") == 0 &&
103 strcmp(compat, "jbus-ppm") == 0) {
104 device_set_desc(dev, "JBus power management");
105 return (BUS_PROBE_DEFAULT);
111 jbusppm_attach(device_t dev)
113 struct jbusppm_softc *sc;
116 device_t *children, tomatillo;
117 u_long tcount, tstart, jcount, jstart;
121 sc = device_get_softc(dev);
122 for (i = JBUSPPM_DEVID; i <= JBUSPPM_ESTAR; i++) {
125 * The JBUSPPM_ESTAR resources is shared with that of the
126 * Tomatillo bus A controller configuration register bank.
129 sc->sc_res[i] = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
130 &rid, (i == JBUSPPM_ESTAR ? RF_SHAREABLE : 0) | RF_ACTIVE);
131 if (sc->sc_res[i] == NULL) {
133 "could not allocate resource %d\n", i);
136 sc->sc_bt[i] = rman_get_bustag(sc->sc_res[i]);
137 sc->sc_bh[i] = rman_get_bushandle(sc->sc_res[i]);
140 * Workaround for the fact that rman(9) only allows to
141 * share resources of the same size.
143 if (i == JBUSPPM_ESTAR) {
144 if (bus_get_resource(dev, SYS_RES_MEMORY, i, &jstart,
147 "could not determine Estar resource\n");
150 if (device_get_children(device_get_parent(dev),
151 &children, &nchildren) != 0) {
152 device_printf(dev, "could not get children\n");
156 for (j = 0; j < nchildren; j++) {
157 if (ofw_bus_get_type(children[j]) != NULL &&
158 strcmp(ofw_bus_get_type(children[j]),
159 OFW_TYPE_PCI) == 0 &&
160 ofw_bus_get_compat(children[j]) != NULL &&
161 strcmp(ofw_bus_get_compat(children[j]),
162 "pci108e,a801") == 0 &&
163 ((bus_get_resource_start(children[j],
164 SYS_RES_MEMORY, 0) >> 20) & 1) == 0) {
165 tomatillo = children[j];
169 free(children, M_TEMP);
170 if (tomatillo == NULL) {
172 "could not find Tomatillo\n");
175 if (bus_get_resource(tomatillo, SYS_RES_MEMORY, 1,
176 &tstart, &tcount) != 0) {
178 "could not determine Tomatillo "
182 sc->sc_res[i] = bus_alloc_resource(dev, SYS_RES_MEMORY,
183 &rid, tstart, tstart + tcount - 1, tcount,
184 RF_SHAREABLE | RF_ACTIVE);
186 sc->sc_res[i] = bus_alloc_resource_any(dev,
187 SYS_RES_MEMORY, &rid, RF_ACTIVE);
188 if (sc->sc_res[i] == NULL) {
190 "could not allocate resource %d\n", i);
193 sc->sc_bt[i] = rman_get_bustag(sc->sc_res[i]);
194 sc->sc_bh[i] = rman_get_bushandle(sc->sc_res[i]);
195 if (i == JBUSPPM_ESTAR)
196 bus_space_subregion(sc->sc_bt[i], sc->sc_bh[i],
197 jstart - tstart, jcount, &sc->sc_bh[i]);
202 if ((JBUSPPM_READ(sc, JBUSPPM_DEVID, JBUSPPM_DEVID_JID) &
203 JBUSPPM_DEVID_JID_MASTER) != 0)
204 device_printf(dev, "master I/O bridge\n");
205 device_printf(dev, "running at ");
206 switch (JBUSPPM_READ(sc, JBUSPPM_ESTAR, JBUSPPM_ESTAR_CTRL) &
207 JBUSPPM_ESTAR_CTRL_MASK) {
208 case JBUSPPM_ESTAR_CTRL_1:
211 case JBUSPPM_ESTAR_CTRL_2:
214 case JBUSPPM_ESTAR_CTRL_32:
227 for (i = JBUSPPM_DEVID; i <= JBUSPPM_ESTAR && sc->sc_res[i] != NULL;
229 bus_release_resource(dev, SYS_RES_MEMORY,
230 rman_get_rid(sc->sc_res[i]), sc->sc_res[i]);