2 * Copyright (c) 2011 Ben Gray <ben.r.gray@gmail.com>.
3 * Copyright (c) 2014 Andrew Turner <andrew@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the company nor the name of the author may be used to
15 * endorse or promote products derived from this software without specific
16 * prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY BEN GRAY ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL BEN GRAY BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
27 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
39 #include <machine/bus.h>
40 #include <machine/intr.h>
42 #include <dev/fdt/fdt_common.h>
43 #include <dev/ofw/ofw_bus.h>
44 #include <dev/ofw/ofw_bus_subr.h>
46 #include <arm/ti/ti_cpuid.h>
47 #include <arm/ti/ti_gpio.h>
48 #include <arm/ti/ti_pinmux.h>
50 #include <arm/ti/omap4/omap4_scm_padconf.h>
52 #include "ti_gpio_if.h"
54 static struct ofw_compat_data compat_data[] = {
61 omap4_gpio_probe(device_t dev)
63 if (ti_chip() != CHIP_OMAP_4)
66 if (!ofw_bus_status_okay(dev))
69 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
72 device_set_desc(dev, "TI OMAP4 General Purpose I/O (GPIO)");
78 omap4_gpio_set_flags(device_t dev, uint32_t gpio, uint32_t flags)
80 unsigned int state = 0;
81 struct ti_gpio_softc *sc;
83 sc = device_get_softc(dev);
84 /* First the SCM driver needs to be told to put the pad into GPIO mode */
85 if (flags & GPIO_PIN_OUTPUT)
86 state = PADCONF_PIN_OUTPUT;
87 else if (flags & GPIO_PIN_INPUT) {
88 if (flags & GPIO_PIN_PULLUP)
89 state = PADCONF_PIN_INPUT_PULLUP;
90 else if (flags & GPIO_PIN_PULLDOWN)
91 state = PADCONF_PIN_INPUT_PULLDOWN;
93 state = PADCONF_PIN_INPUT;
95 return ti_pinmux_padconf_set_gpiomode((sc->sc_bank-1)*32 + gpio, state);
99 omap4_gpio_get_flags(device_t dev, uint32_t gpio, uint32_t *flags)
102 struct ti_gpio_softc *sc;
104 sc = device_get_softc(dev);
106 /* Get the current pin state */
107 if (ti_pinmux_padconf_get_gpiomode((sc->sc_bank-1)*32 + gpio, &state) != 0) {
112 case PADCONF_PIN_OUTPUT:
113 *flags = GPIO_PIN_OUTPUT;
115 case PADCONF_PIN_INPUT:
116 *flags = GPIO_PIN_INPUT;
118 case PADCONF_PIN_INPUT_PULLUP:
119 *flags = GPIO_PIN_INPUT | GPIO_PIN_PULLUP;
121 case PADCONF_PIN_INPUT_PULLDOWN:
122 *flags = GPIO_PIN_INPUT | GPIO_PIN_PULLDOWN;
133 static device_method_t omap4_gpio_methods[] = {
135 DEVMETHOD(device_probe, omap4_gpio_probe),
137 /* ti_gpio interface */
138 DEVMETHOD(ti_gpio_set_flags, omap4_gpio_set_flags),
139 DEVMETHOD(ti_gpio_get_flags, omap4_gpio_get_flags),
144 extern driver_t ti_gpio_driver;
145 static devclass_t omap4_gpio_devclass;
147 DEFINE_CLASS_1(gpio, omap4_gpio_driver, omap4_gpio_methods,
148 sizeof(struct ti_gpio_softc), ti_gpio_driver);
149 DRIVER_MODULE(omap4_gpio, simplebus, omap4_gpio_driver, omap4_gpio_devclass,