2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2013-2014 Ruslan Bukin <br@bsdpad.com>
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
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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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
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30 * Vybrid Family Input/Output Multiplexer Controller (IOMUXC)
31 * Chapter 5, Vybrid Reference Manual, Rev. 5, 07/2013
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 #include <sys/param.h>
38 #include <sys/systm.h>
40 #include <sys/kernel.h>
41 #include <sys/module.h>
42 #include <sys/malloc.h>
44 #include <sys/timeet.h>
45 #include <sys/timetc.h>
46 #include <sys/watchdog.h>
48 #include <dev/fdt/fdt_common.h>
49 #include <dev/ofw/openfirm.h>
50 #include <dev/ofw/ofw_bus.h>
51 #include <dev/ofw/ofw_bus_subr.h>
53 #include <machine/bus.h>
54 #include <machine/cpu.h>
55 #include <machine/intr.h>
57 #include <arm/freescale/vybrid/vf_iomuxc.h>
58 #include <arm/freescale/vybrid/vf_common.h>
60 #define MUX_MODE_MASK 7
61 #define MUX_MODE_SHIFT 20
62 #define MUX_MODE_GPIO 0
63 #define MUX_MODE_VBUS_EN_OTG 2
65 #define IBE (1 << 0) /* Input Buffer Enable Field */
66 #define OBE (1 << 1) /* Output Buffer Enable Field. */
67 #define PUE (1 << 2) /* Pull / Keep Select Field. */
68 #define PKE (1 << 3) /* Pull / Keep Enable Field. */
69 #define HYS (1 << 9) /* Hysteresis Enable Field */
70 #define ODE (1 << 10) /* Open Drain Enable Field. */
71 #define SRE (1 << 11) /* Slew Rate Field. */
73 #define SPEED_SHIFT 12
74 #define SPEED_MASK 0x3
75 #define SPEED_LOW 0 /* 50 MHz */
76 #define SPEED_MEDIUM 0x1 /* 100 MHz */
77 #define SPEED_HIGH 0x3 /* 200 MHz */
79 #define PUS_SHIFT 4 /* Pull Up / Down Config Field Shift */
81 #define PUS_100_KOHM_PULL_DOWN 0
82 #define PUS_47_KOHM_PULL_UP 0x1
83 #define PUS_100_KOHM_PULL_UP 0x2
84 #define PUS_22_KOHM_PULL_UP 0x3
86 #define DSE_SHIFT 6 /* Drive Strength Field Shift */
88 #define DSE_DISABLED 0 /* Output driver disabled */
89 #define DSE_150_OHM 0x1
90 #define DSE_75_OHM 0x2
91 #define DSE_50_OHM 0x3
92 #define DSE_37_OHM 0x4
93 #define DSE_30_OHM 0x5
94 #define DSE_25_OHM 0x6
95 #define DSE_20_OHM 0x7
97 #define MAX_MUX_LEN 1024
100 struct resource *tmr_res[1];
102 bus_space_handle_t bsh;
106 static struct resource_spec iomuxc_spec[] = {
107 { SYS_RES_MEMORY, 0, RF_ACTIVE },
112 iomuxc_probe(device_t dev)
115 if (!ofw_bus_status_okay(dev))
118 if (!ofw_bus_is_compatible(dev, "fsl,mvf600-iomuxc"))
121 device_set_desc(dev, "Vybrid Family IOMUXC Unit");
122 return (BUS_PROBE_DEFAULT);
126 pinmux_set(struct iomuxc_softc *sc)
128 phandle_t child, parent, root;
129 pcell_t iomux_config[MAX_MUX_LEN];
136 root = OF_finddevice("/");
140 /* Find 'iomux_config' prop in the nodes */
141 for (child = OF_child(parent); child != 0; child = OF_peer(child)) {
142 /* Find a 'leaf'. Start the search from this node. */
143 while (OF_child(child)) {
145 child = OF_child(child);
148 if (!ofw_bus_node_status_okay(child))
151 if ((len = OF_getproplen(child, "iomux_config")) > 0) {
152 OF_getencprop(child, "iomux_config", iomux_config, len);
154 values = len / (sizeof(uint32_t));
155 for (i = 0; i < values; i += 2) {
156 pin = iomux_config[i];
157 pin_cfg = iomux_config[i+1];
159 device_printf(sc->dev, "Set pin %d to 0x%08x\n",
162 WRITE4(sc, IOMUXC(pin), pin_cfg);
166 if (OF_peer(child) == 0) {
167 /* No more siblings. */
169 parent = OF_parent(child);
177 iomuxc_attach(device_t dev)
179 struct iomuxc_softc *sc;
181 sc = device_get_softc(dev);
184 if (bus_alloc_resources(dev, iomuxc_spec, sc->tmr_res)) {
185 device_printf(dev, "could not allocate resources\n");
189 /* Memory interface */
190 sc->bst = rman_get_bustag(sc->tmr_res[0]);
191 sc->bsh = rman_get_bushandle(sc->tmr_res[0]);
198 static device_method_t iomuxc_methods[] = {
199 DEVMETHOD(device_probe, iomuxc_probe),
200 DEVMETHOD(device_attach, iomuxc_attach),
204 static driver_t iomuxc_driver = {
207 sizeof(struct iomuxc_softc),
210 static devclass_t iomuxc_devclass;
212 DRIVER_MODULE(iomuxc, simplebus, iomuxc_driver, iomuxc_devclass, 0, 0);