1bf77189fSLuiz Otavio O Souza /*-
2bf77189fSLuiz Otavio O Souza * Copyright (c) 2016 Rubicon Communications, LLC (Netgate)
3bf77189fSLuiz Otavio O Souza * All rights reserved.
4bf77189fSLuiz Otavio O Souza *
5bf77189fSLuiz Otavio O Souza * Redistribution and use in source and binary forms, with or without
6bf77189fSLuiz Otavio O Souza * modification, are permitted provided that the following conditions
7bf77189fSLuiz Otavio O Souza * are met:
8bf77189fSLuiz Otavio O Souza * 1. Redistributions of source code must retain the above copyright
9bf77189fSLuiz Otavio O Souza * notice, this list of conditions and the following disclaimer.
10bf77189fSLuiz Otavio O Souza * 2. Redistributions in binary form must reproduce the above copyright
11bf77189fSLuiz Otavio O Souza * notice, this list of conditions and the following disclaimer in the
12bf77189fSLuiz Otavio O Souza * documentation and/or other materials provided with the distribution.
13bf77189fSLuiz Otavio O Souza *
14bf77189fSLuiz Otavio O Souza * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15bf77189fSLuiz Otavio O Souza * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16bf77189fSLuiz Otavio O Souza * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17bf77189fSLuiz Otavio O Souza * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18bf77189fSLuiz Otavio O Souza * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19bf77189fSLuiz Otavio O Souza * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20bf77189fSLuiz Otavio O Souza * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21bf77189fSLuiz Otavio O Souza * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22bf77189fSLuiz Otavio O Souza * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23bf77189fSLuiz Otavio O Souza * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24bf77189fSLuiz Otavio O Souza * SUCH DAMAGE.
25bf77189fSLuiz Otavio O Souza */
26bf77189fSLuiz Otavio O Souza
27bf77189fSLuiz Otavio O Souza #include <sys/param.h>
28bf77189fSLuiz Otavio O Souza #include <sys/systm.h>
29bf77189fSLuiz Otavio O Souza #include <sys/bus.h>
30bf77189fSLuiz Otavio O Souza #include <sys/kernel.h>
31bf77189fSLuiz Otavio O Souza #include <sys/module.h>
32bf77189fSLuiz Otavio O Souza #include <sys/sysctl.h>
33bf77189fSLuiz Otavio O Souza
34bf77189fSLuiz Otavio O Souza #include <machine/bus.h>
35bf77189fSLuiz Otavio O Souza
36bf77189fSLuiz Otavio O Souza #include <arm/ti/am335x/am335x_scm.h>
37bf77189fSLuiz Otavio O Souza #include <arm/ti/ti_cpuid.h>
38bf77189fSLuiz Otavio O Souza #include <arm/ti/ti_scm.h>
39bf77189fSLuiz Otavio O Souza
4062e8ccc3SEmmanuel Vadot #include <dev/syscon/syscon.h>
410050ea24SMichal Meloun #include "syscon_if.h"
420050ea24SMichal Meloun
43bf77189fSLuiz Otavio O Souza #define TZ_ZEROC 2731
44bf77189fSLuiz Otavio O Souza
45bf77189fSLuiz Otavio O Souza struct am335x_scm_softc {
46bf77189fSLuiz Otavio O Souza int sc_last_temp;
47bf77189fSLuiz Otavio O Souza struct sysctl_oid *sc_temp_oid;
480050ea24SMichal Meloun struct syscon *syscon;
49bf77189fSLuiz Otavio O Souza };
50bf77189fSLuiz Otavio O Souza
51bf77189fSLuiz Otavio O Souza static int
am335x_scm_temp_sysctl(SYSCTL_HANDLER_ARGS)52bf77189fSLuiz Otavio O Souza am335x_scm_temp_sysctl(SYSCTL_HANDLER_ARGS)
53bf77189fSLuiz Otavio O Souza {
54bf77189fSLuiz Otavio O Souza device_t dev;
55bf77189fSLuiz Otavio O Souza int i, temp;
56bf77189fSLuiz Otavio O Souza struct am335x_scm_softc *sc;
57bf77189fSLuiz Otavio O Souza uint32_t reg;
58bf77189fSLuiz Otavio O Souza
59bf77189fSLuiz Otavio O Souza dev = (device_t)arg1;
60bf77189fSLuiz Otavio O Souza sc = device_get_softc(dev);
61bf77189fSLuiz Otavio O Souza
62bf77189fSLuiz Otavio O Souza /* Read the temperature and convert to Kelvin. */
63bf77189fSLuiz Otavio O Souza for(i = 50; i > 0; i--) {
640050ea24SMichal Meloun reg = SYSCON_READ_4(sc->syscon, SCM_BGAP_CTRL);
65bf77189fSLuiz Otavio O Souza if ((reg & SCM_BGAP_EOCZ) == 0)
66bf77189fSLuiz Otavio O Souza break;
67bf77189fSLuiz Otavio O Souza DELAY(50);
68bf77189fSLuiz Otavio O Souza }
69bf77189fSLuiz Otavio O Souza if ((reg & SCM_BGAP_EOCZ) == 0) {
70bf77189fSLuiz Otavio O Souza sc->sc_last_temp =
71bf77189fSLuiz Otavio O Souza (reg >> SCM_BGAP_TEMP_SHIFT) & SCM_BGAP_TEMP_MASK;
72bf77189fSLuiz Otavio O Souza sc->sc_last_temp *= 10;
73bf77189fSLuiz Otavio O Souza }
74bf77189fSLuiz Otavio O Souza temp = sc->sc_last_temp + TZ_ZEROC;
75bf77189fSLuiz Otavio O Souza
76bf77189fSLuiz Otavio O Souza return (sysctl_handle_int(oidp, &temp, 0, req));
77bf77189fSLuiz Otavio O Souza }
78bf77189fSLuiz Otavio O Souza
79bf77189fSLuiz Otavio O Souza static void
am335x_scm_identify(driver_t * driver,device_t parent)80bf77189fSLuiz Otavio O Souza am335x_scm_identify(driver_t *driver, device_t parent)
81bf77189fSLuiz Otavio O Souza {
82bf77189fSLuiz Otavio O Souza device_t child;
83bf77189fSLuiz Otavio O Souza
84bf77189fSLuiz Otavio O Souza /* AM335x only. */
85bf77189fSLuiz Otavio O Souza if (ti_chip() != CHIP_AM335X)
86bf77189fSLuiz Otavio O Souza return;
87bf77189fSLuiz Otavio O Souza
88bf77189fSLuiz Otavio O Souza /* Make sure we attach only once. */
89bf77189fSLuiz Otavio O Souza if (device_find_child(parent, "am335x_scm", -1) != NULL)
90bf77189fSLuiz Otavio O Souza return;
91bf77189fSLuiz Otavio O Souza
92bf77189fSLuiz Otavio O Souza child = device_add_child(parent, "am335x_scm", -1);
93bf77189fSLuiz Otavio O Souza if (child == NULL)
94bf77189fSLuiz Otavio O Souza device_printf(parent, "cannot add ti_scm child\n");
95bf77189fSLuiz Otavio O Souza }
96bf77189fSLuiz Otavio O Souza
97bf77189fSLuiz Otavio O Souza static int
am335x_scm_probe(device_t dev)98bf77189fSLuiz Otavio O Souza am335x_scm_probe(device_t dev)
99bf77189fSLuiz Otavio O Souza {
1000050ea24SMichal Meloun /* Just allow the first one */
1010050ea24SMichal Meloun if (strcmp(device_get_nameunit(dev), "am335x_scm0") != 0)
1020050ea24SMichal Meloun return (ENXIO);
103bf77189fSLuiz Otavio O Souza
104bf77189fSLuiz Otavio O Souza device_set_desc(dev, "AM335x Control Module Extension");
105bf77189fSLuiz Otavio O Souza
106bf77189fSLuiz Otavio O Souza return (BUS_PROBE_DEFAULT);
107bf77189fSLuiz Otavio O Souza }
108bf77189fSLuiz Otavio O Souza
109bf77189fSLuiz Otavio O Souza static int
am335x_scm_attach(device_t dev)110bf77189fSLuiz Otavio O Souza am335x_scm_attach(device_t dev)
111bf77189fSLuiz Otavio O Souza {
112bf77189fSLuiz Otavio O Souza struct am335x_scm_softc *sc;
113bf77189fSLuiz Otavio O Souza struct sysctl_ctx_list *ctx;
114bf77189fSLuiz Otavio O Souza struct sysctl_oid_list *tree;
115bf77189fSLuiz Otavio O Souza uint32_t reg;
1160050ea24SMichal Meloun phandle_t opp_table;
1170050ea24SMichal Meloun int err;
1180050ea24SMichal Meloun
1190050ea24SMichal Meloun sc = device_get_softc(dev);
1200050ea24SMichal Meloun
1210050ea24SMichal Meloun /* FIXME: For now; Go and kidnap syscon from opp-table */
1220050ea24SMichal Meloun opp_table = OF_finddevice("/opp-table");
1230050ea24SMichal Meloun if (opp_table == -1) {
1240050ea24SMichal Meloun device_printf(dev, "Cant find /opp-table\n");
1250050ea24SMichal Meloun return (ENXIO);
1260050ea24SMichal Meloun }
1270050ea24SMichal Meloun if (!OF_hasprop(opp_table, "syscon")) {
1280050ea24SMichal Meloun device_printf(dev, "/opp-table missing syscon property\n");
1290050ea24SMichal Meloun return (ENXIO);
1300050ea24SMichal Meloun }
1310050ea24SMichal Meloun err = syscon_get_by_ofw_property(dev, opp_table, "syscon", &sc->syscon);
1320050ea24SMichal Meloun if (err) {
1330050ea24SMichal Meloun device_printf(dev, "Failed to get syscon\n");
1340050ea24SMichal Meloun return (ENXIO);
1350050ea24SMichal Meloun }
136bf77189fSLuiz Otavio O Souza
137ab8fdaccSLuiz Otavio O Souza /* Reset the digital outputs. */
1380050ea24SMichal Meloun SYSCON_WRITE_4(sc->syscon, SCM_BGAP_CTRL, 0);
1390050ea24SMichal Meloun reg = SYSCON_READ_4(sc->syscon, SCM_BGAP_CTRL);
140ab8fdaccSLuiz Otavio O Souza DELAY(500);
1411261c01dSGordon Bergling /* Set continuous mode. */
1420050ea24SMichal Meloun SYSCON_WRITE_4(sc->syscon, SCM_BGAP_CTRL, SCM_BGAP_CONTCONV);
1430050ea24SMichal Meloun reg = SYSCON_READ_4(sc->syscon, SCM_BGAP_CTRL);
144ab8fdaccSLuiz Otavio O Souza DELAY(500);
145bf77189fSLuiz Otavio O Souza /* Start the ADC conversion. */
146bf77189fSLuiz Otavio O Souza reg = SCM_BGAP_CLRZ | SCM_BGAP_CONTCONV | SCM_BGAP_SOC;
1470050ea24SMichal Meloun SYSCON_WRITE_4(sc->syscon, SCM_BGAP_CTRL, reg);
148bf77189fSLuiz Otavio O Souza
149bf77189fSLuiz Otavio O Souza /* Temperature sysctl. */
150bf77189fSLuiz Otavio O Souza ctx = device_get_sysctl_ctx(dev);
151bf77189fSLuiz Otavio O Souza tree = SYSCTL_CHILDREN(device_get_sysctl_tree(dev));
152bf77189fSLuiz Otavio O Souza sc->sc_temp_oid = SYSCTL_ADD_PROC(ctx, tree, OID_AUTO,
153bf77189fSLuiz Otavio O Souza "temperature", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE,
154bf77189fSLuiz Otavio O Souza dev, 0, am335x_scm_temp_sysctl, "IK", "Current temperature");
155bf77189fSLuiz Otavio O Souza
156bf77189fSLuiz Otavio O Souza return (0);
157bf77189fSLuiz Otavio O Souza }
158bf77189fSLuiz Otavio O Souza
159bf77189fSLuiz Otavio O Souza static int
am335x_scm_detach(device_t dev)160bf77189fSLuiz Otavio O Souza am335x_scm_detach(device_t dev)
161bf77189fSLuiz Otavio O Souza {
162bf77189fSLuiz Otavio O Souza struct am335x_scm_softc *sc;
163bf77189fSLuiz Otavio O Souza
164bf77189fSLuiz Otavio O Souza sc = device_get_softc(dev);
165bf77189fSLuiz Otavio O Souza
166bf77189fSLuiz Otavio O Souza /* Remove temperature sysctl. */
167bf77189fSLuiz Otavio O Souza if (sc->sc_temp_oid != NULL)
168bf77189fSLuiz Otavio O Souza sysctl_remove_oid(sc->sc_temp_oid, 1, 0);
169bf77189fSLuiz Otavio O Souza
170bf77189fSLuiz Otavio O Souza /* Stop the bandgap ADC. */
1710050ea24SMichal Meloun SYSCON_WRITE_4(sc->syscon, SCM_BGAP_CTRL, SCM_BGAP_BGOFF);
172bf77189fSLuiz Otavio O Souza
173bf77189fSLuiz Otavio O Souza return (0);
174bf77189fSLuiz Otavio O Souza }
175bf77189fSLuiz Otavio O Souza
176bf77189fSLuiz Otavio O Souza static device_method_t am335x_scm_methods[] = {
177bf77189fSLuiz Otavio O Souza DEVMETHOD(device_identify, am335x_scm_identify),
178bf77189fSLuiz Otavio O Souza DEVMETHOD(device_probe, am335x_scm_probe),
179bf77189fSLuiz Otavio O Souza DEVMETHOD(device_attach, am335x_scm_attach),
180bf77189fSLuiz Otavio O Souza DEVMETHOD(device_detach, am335x_scm_detach),
181bf77189fSLuiz Otavio O Souza
182bf77189fSLuiz Otavio O Souza DEVMETHOD_END
183bf77189fSLuiz Otavio O Souza };
184bf77189fSLuiz Otavio O Souza
185bf77189fSLuiz Otavio O Souza static driver_t am335x_scm_driver = {
186bf77189fSLuiz Otavio O Souza "am335x_scm",
187bf77189fSLuiz Otavio O Souza am335x_scm_methods,
188bf77189fSLuiz Otavio O Souza sizeof(struct am335x_scm_softc),
189bf77189fSLuiz Otavio O Souza };
190bf77189fSLuiz Otavio O Souza
1918537e671SJohn Baldwin DRIVER_MODULE(am335x_scm, ti_scm, am335x_scm_driver, 0, 0);
192bf77189fSLuiz Otavio O Souza MODULE_VERSION(am335x_scm, 1);
1930050ea24SMichal Meloun MODULE_DEPEND(am335x_scm, ti_scm_syscon, 1, 1, 1);
194