2 * Copyright (c) 2013 Ruslan Bukin <br@bsdpad.com>
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 AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * Vybrid Family Input/Output Multiplexer Controller (IOMUXC)
29 * Chapter 5, Vybrid Reference Manual, Rev. 5, 07/2013
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include <sys/param.h>
36 #include <sys/systm.h>
38 #include <sys/kernel.h>
39 #include <sys/module.h>
40 #include <sys/malloc.h>
42 #include <sys/timeet.h>
43 #include <sys/timetc.h>
44 #include <sys/watchdog.h>
46 #include <dev/fdt/fdt_common.h>
47 #include <dev/ofw/openfirm.h>
48 #include <dev/ofw/ofw_bus.h>
49 #include <dev/ofw/ofw_bus_subr.h>
51 #include <machine/bus.h>
52 #include <machine/fdt.h>
53 #include <machine/cpu.h>
54 #include <machine/intr.h>
56 #include <arm/freescale/vybrid/vf_iomuxc.h>
57 #include <arm/freescale/vybrid/vf_common.h>
59 #define IBE (1 << 0) /* Input Buffer Enable Field */
60 #define OBE (1 << 1) /* Output Buffer Enable Field. */
61 #define PUE (1 << 2) /* Pull / Keep Select Field. */
62 #define PKE (1 << 3) /* Pull / Keep Enable Field. */
63 #define PUS_MASK (3 << 4) /* Pull Up / Down Config Field. */
64 #define DSE_MASK (7 << 6) /* Drive Strength Field. */
65 #define HYS (1 << 9) /* Hysteresis Enable Field */
67 #define MUX_MODE_MASK 7
68 #define MUX_MODE_SHIFT 20
69 #define MUX_MODE_GPIO 0
70 #define MUX_MODE_RMII 1
71 #define MUX_MODE_RMII_CLKIN 2
72 #define MUX_MODE_VBUS_EN_OTG 2
74 #define PUS_22_KOHM_PULL_UP (3 << 4)
75 #define DSE_25_OHM (6 << 6)
77 #define NET0_PAD_START 45
78 #define NET1_PAD_START 54
82 struct resource *tmr_res[1];
84 bus_space_handle_t bsh;
88 static struct resource_spec iomuxc_spec[] = {
89 { SYS_RES_MEMORY, 0, RF_ACTIVE },
94 iomuxc_probe(device_t dev)
97 if (!ofw_bus_is_compatible(dev, "fsl,mvf600-iomuxc"))
100 device_set_desc(dev, "Vybrid Family IOMUXC Unit");
101 return (BUS_PROBE_DEFAULT);
105 configure_pad(struct iomuxc_softc *sc, int pad, int mux_mode)
109 reg = READ4(sc, pad);
110 reg &= ~(MUX_MODE_MASK << MUX_MODE_SHIFT);
111 reg |= (mux_mode << MUX_MODE_SHIFT);
112 WRITE4(sc, pad, reg);
118 iomuxc_attach(device_t dev)
120 struct iomuxc_softc *sc;
124 sc = device_get_softc(dev);
127 if (bus_alloc_resources(dev, iomuxc_spec, sc->tmr_res)) {
128 device_printf(dev, "could not allocate resources\n");
132 /* Memory interface */
133 sc->bst = rman_get_bustag(sc->tmr_res[0]);
134 sc->bsh = rman_get_bushandle(sc->tmr_res[0]);
137 configure_pad(sc, IOMUXC_PTA17, MUX_MODE_VBUS_EN_OTG);
138 reg = (PKE | PUE | PUS_22_KOHM_PULL_UP | DSE_25_OHM | OBE);
139 WRITE4(sc, IOMUXC_PTA7, reg);
142 configure_pad(sc, IOMUXC_PTA6, MUX_MODE_RMII_CLKIN);
145 for (i = NET0_PAD_START; i <= (NET0_PAD_START + NET_PAD_N); i++) {
146 configure_pad(sc, IOMUXC(i), MUX_MODE_RMII);
150 for (i = NET1_PAD_START; i <= (NET1_PAD_START + NET_PAD_N); i++) {
151 configure_pad(sc, IOMUXC(i), MUX_MODE_RMII);
157 static device_method_t iomuxc_methods[] = {
158 DEVMETHOD(device_probe, iomuxc_probe),
159 DEVMETHOD(device_attach, iomuxc_attach),
163 static driver_t iomuxc_driver = {
166 sizeof(struct iomuxc_softc),
169 static devclass_t iomuxc_devclass;
171 DRIVER_MODULE(iomuxc, simplebus, iomuxc_driver, iomuxc_devclass, 0, 0);