2 * Copyright (c) 2013 Rui Paulo <rpaulo@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
18 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
20 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
22 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
23 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24 * POSSIBILITY OF SUCH DAMAGE.
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
29 #include <sys/param.h>
30 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <sys/malloc.h>
36 #include <sys/timeet.h>
37 #include <sys/timetc.h>
38 #include <sys/watchdog.h>
39 #include <machine/bus.h>
40 #include <machine/cpu.h>
41 #include <machine/frame.h>
42 #include <machine/intr.h>
44 #include <dev/fdt/fdt_common.h>
45 #include <dev/ofw/openfirm.h>
46 #include <dev/ofw/ofw_bus.h>
47 #include <dev/ofw/ofw_bus_subr.h>
49 #include <machine/bus.h>
50 #include <machine/fdt.h>
52 #include <arm/ti/ti_mbox.h>
53 #include <arm/ti/ti_prcm.h>
59 #define DPRINTF(fmt, ...) do { \
60 printf("%s: ", __func__); \
61 printf(fmt, __VA_ARGS__); \
64 #define DPRINTF(fmt, ...)
67 static device_probe_t ti_mbox_probe;
68 static device_attach_t ti_mbox_attach;
69 static device_detach_t ti_mbox_detach;
70 static void ti_mbox_intr(void *);
71 static int ti_mbox_read(device_t, int, uint32_t *);
72 static int ti_mbox_write(device_t, int, uint32_t);
74 struct ti_mbox_softc {
76 struct resource *sc_mem_res;
77 struct resource *sc_irq_res;
79 bus_space_tag_t sc_bt;
80 bus_space_handle_t sc_bh;
83 #define TI_MBOX_LOCK(sc) mtx_lock(&(sc)->sc_mtx)
84 #define TI_MBOX_UNLOCK(sc) mtx_unlock(&(sc)->sc_mtx)
86 static device_method_t ti_mbox_methods[] = {
87 DEVMETHOD(device_probe, ti_mbox_probe),
88 DEVMETHOD(device_attach, ti_mbox_attach),
89 DEVMETHOD(device_detach, ti_mbox_detach),
91 DEVMETHOD(mbox_read, ti_mbox_read),
92 DEVMETHOD(mbox_write, ti_mbox_write),
97 static driver_t ti_mbox_driver = {
100 sizeof(struct ti_mbox_softc)
103 static devclass_t ti_mbox_devclass;
105 DRIVER_MODULE(ti_mbox, simplebus, ti_mbox_driver, ti_mbox_devclass, 0, 0);
107 static __inline uint32_t
108 ti_mbox_reg_read(struct ti_mbox_softc *sc, uint16_t reg)
110 return (bus_space_read_4(sc->sc_bt, sc->sc_bh, reg));
114 ti_mbox_reg_write(struct ti_mbox_softc *sc, uint16_t reg, uint32_t val)
116 bus_space_write_4(sc->sc_bt, sc->sc_bh, reg, val);
120 ti_mbox_probe(device_t dev)
123 if (!ofw_bus_status_okay(dev))
126 if (ofw_bus_is_compatible(dev, "ti,system-mbox")) {
127 device_set_desc(dev, "TI System Mailbox");
128 return (BUS_PROBE_DEFAULT);
135 ti_mbox_attach(device_t dev)
137 struct ti_mbox_softc *sc;
138 int rid, delay, chan;
139 uint32_t rev, sysconfig;
141 if (ti_prcm_clk_enable(MAILBOX0_CLK) != 0) {
142 device_printf(dev, "could not enable MBOX clock\n");
145 sc = device_get_softc(dev);
147 mtx_init(&sc->sc_mtx, "TI mbox", NULL, MTX_DEF);
148 sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
150 if (sc->sc_mem_res == NULL) {
151 device_printf(dev, "could not allocate memory resource\n");
154 sc->sc_bt = rman_get_bustag(sc->sc_mem_res);
155 sc->sc_bh = rman_get_bushandle(sc->sc_mem_res);
157 sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
159 if (sc->sc_irq_res == NULL) {
160 device_printf(dev, "could not allocate interrupt resource\n");
164 if (bus_setup_intr(dev, sc->sc_irq_res, INTR_MPSAFE | INTR_TYPE_MISC,
165 NULL, ti_mbox_intr, sc, &sc->sc_intr) != 0) {
166 device_printf(dev, "unable to setup the interrupt handler\n");
171 * Reset the controller.
173 sysconfig = ti_mbox_reg_read(sc, TI_MBOX_SYSCONFIG);
174 DPRINTF("initial sysconfig %d\n", sysconfig);
175 sysconfig |= TI_MBOX_SYSCONFIG_SOFTRST;
177 while (ti_mbox_reg_read(sc, TI_MBOX_SYSCONFIG) &
178 TI_MBOX_SYSCONFIG_SOFTRST) {
183 device_printf(dev, "controller reset failed\n");
188 * Enable smart idle mode.
190 ti_mbox_reg_write(sc, TI_MBOX_SYSCONFIG,
191 ti_mbox_reg_read(sc, TI_MBOX_SYSCONFIG) | TI_MBOX_SYSCONFIG_SMARTIDLE);
192 rev = ti_mbox_reg_read(sc, TI_MBOX_REVISION);
193 DPRINTF("rev %d\n", rev);
194 device_printf(dev, "revision %d.%d\n", (rev >> 8) & 0x4, rev & 0x40);
196 * Enable message interrupts.
198 for (chan = 0; chan < 8; chan++)
199 ti_mbox_reg_write(sc, TI_MBOX_IRQENABLE_SET(chan), 1);
205 ti_mbox_detach(device_t dev)
207 struct ti_mbox_softc *sc;
209 sc = device_get_softc(dev);
211 bus_teardown_intr(dev, sc->sc_irq_res, sc->sc_intr);
213 bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(sc->sc_irq_res),
216 bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(sc->sc_mem_res),
223 ti_mbox_intr(void *arg)
225 struct ti_mbox_softc *sc;
228 DPRINTF("interrupt %p", sc);
232 ti_mbox_read(device_t dev, int chan, uint32_t *data)
234 struct ti_mbox_softc *sc;
236 if (chan < 0 || chan > 7)
238 sc = device_get_softc(dev);
240 return (ti_mbox_reg_read(sc, TI_MBOX_MESSAGE(chan)));
244 ti_mbox_write(device_t dev, int chan, uint32_t data)
247 struct ti_mbox_softc *sc;
249 if (chan < 0 || chan > 7)
251 sc = device_get_softc(dev);
253 /* XXX implement interrupt method */
254 while (ti_mbox_reg_read(sc, TI_MBOX_FIFOSTATUS(chan)) == 1 &&
259 device_printf(dev, "FIFOSTAUS%d stuck\n", chan);
263 ti_mbox_reg_write(sc, TI_MBOX_MESSAGE(chan), data);