2 * Copyright (c) 2018 Ruslan Bukin <br@bsdpad.com>
5 * This software was developed by BAE Systems, the University of Cambridge
6 * Computer Laboratory, and Memorial University under DARPA/AFRL contract
7 * FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent Computing
8 * (TC) research program.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include <sys/param.h>
36 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/module.h>
41 #include <machine/bus.h>
43 #include <arm64/coresight/coresight.h>
44 #include <arm64/coresight/coresight-funnel.h>
46 #include <dev/ofw/ofw_bus.h>
47 #include <dev/ofw/ofw_bus_subr.h>
49 #include "coresight_if.h"
55 #define dprintf(fmt, ...) printf(fmt, ##__VA_ARGS__)
57 #define dprintf(fmt, ...)
60 static struct ofw_compat_data compat_data[] = {
61 { "arm,coresight-funnel", 1 },
67 struct coresight_platform_data *pdata;
70 static struct resource_spec funnel_spec[] = {
71 { SYS_RES_MEMORY, 0, RF_ACTIVE },
76 funnel_init(device_t dev)
78 struct funnel_softc *sc;
80 sc = device_get_softc(dev);
82 /* Unlock Coresight */
83 bus_write_4(sc->res, CORESIGHT_LAR, CORESIGHT_UNLOCK);
85 dprintf("Device ID: %x\n", bus_read_4(sc->res, FUNNEL_DEVICEID));
91 funnel_enable(device_t dev, struct endpoint *endp,
92 struct coresight_event *event)
94 struct funnel_softc *sc;
97 sc = device_get_softc(dev);
99 reg = bus_read_4(sc->res, FUNNEL_FUNCTL);
100 reg &= ~(FUNCTL_HOLDTIME_MASK);
101 reg |= (7 << FUNCTL_HOLDTIME_SHIFT);
102 reg |= (1 << endp->reg);
103 bus_write_4(sc->res, FUNNEL_FUNCTL, reg);
109 funnel_disable(device_t dev, struct endpoint *endp,
110 struct coresight_event *event)
112 struct funnel_softc *sc;
115 sc = device_get_softc(dev);
117 reg = bus_read_4(sc->res, FUNNEL_FUNCTL);
118 reg &= ~(1 << endp->reg);
119 bus_write_4(sc->res, FUNNEL_FUNCTL, reg);
123 funnel_probe(device_t dev)
126 if (!ofw_bus_status_okay(dev))
129 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
132 device_set_desc(dev, "Coresight Funnel");
134 return (BUS_PROBE_DEFAULT);
138 funnel_attach(device_t dev)
140 struct coresight_desc desc;
141 struct funnel_softc *sc;
143 sc = device_get_softc(dev);
145 if (bus_alloc_resources(dev, funnel_spec, &sc->res) != 0) {
146 device_printf(dev, "cannot allocate resources for device\n");
150 sc->pdata = coresight_get_platform_data(dev);
151 desc.pdata = sc->pdata;
153 desc.dev_type = CORESIGHT_FUNNEL;
154 coresight_register(&desc);
159 static device_method_t funnel_methods[] = {
160 /* Device interface */
161 DEVMETHOD(device_probe, funnel_probe),
162 DEVMETHOD(device_attach, funnel_attach),
164 /* Coresight interface */
165 DEVMETHOD(coresight_init, funnel_init),
166 DEVMETHOD(coresight_enable, funnel_enable),
167 DEVMETHOD(coresight_disable, funnel_disable),
171 static driver_t funnel_driver = {
174 sizeof(struct funnel_softc),
177 static devclass_t funnel_devclass;
179 DRIVER_MODULE(funnel, simplebus, funnel_driver, funnel_devclass, 0, 0);
180 MODULE_VERSION(funnel, 1);