1b6c7dacfSAndrew Turner /*-
2b6c7dacfSAndrew Turner * Copyright (c) 2012 Damjan Marion <dmarion@FreeBSD.org>
3b6c7dacfSAndrew Turner * Copyright (c) 2014 Andrew Turner <andrew@FreeBSD.org>
4b6c7dacfSAndrew Turner * All rights reserved.
5b6c7dacfSAndrew Turner *
6b6c7dacfSAndrew Turner * Redistribution and use in source and binary forms, with or without
7b6c7dacfSAndrew Turner * modification, are permitted provided that the following conditions
8b6c7dacfSAndrew Turner * are met:
9b6c7dacfSAndrew Turner * 1. Redistributions of source code must retain the above copyright
10b6c7dacfSAndrew Turner * notice, this list of conditions and the following disclaimer.
11b6c7dacfSAndrew Turner * 2. Redistributions in binary form must reproduce the above copyright
12b6c7dacfSAndrew Turner * notice, this list of conditions and the following disclaimer in the
13b6c7dacfSAndrew Turner * documentation and/or other materials provided with the distribution.
14b6c7dacfSAndrew Turner *
15b6c7dacfSAndrew Turner * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16b6c7dacfSAndrew Turner * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17b6c7dacfSAndrew Turner * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18b6c7dacfSAndrew Turner * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19b6c7dacfSAndrew Turner * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20b6c7dacfSAndrew Turner * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21b6c7dacfSAndrew Turner * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22b6c7dacfSAndrew Turner * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23b6c7dacfSAndrew Turner * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24b6c7dacfSAndrew Turner * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25b6c7dacfSAndrew Turner * SUCH DAMAGE.
26b6c7dacfSAndrew Turner */
27b6c7dacfSAndrew Turner
28b6c7dacfSAndrew Turner #include <sys/param.h>
29b6c7dacfSAndrew Turner #include <sys/systm.h>
30b6c7dacfSAndrew Turner #include <sys/kernel.h>
31b6c7dacfSAndrew Turner #include <sys/module.h>
32b6c7dacfSAndrew Turner #include <sys/bus.h>
33b6c7dacfSAndrew Turner #include <sys/resource.h>
34b6c7dacfSAndrew Turner #include <sys/rman.h>
35b6c7dacfSAndrew Turner #include <sys/lock.h>
36b6c7dacfSAndrew Turner #include <sys/malloc.h>
37b6c7dacfSAndrew Turner
38b6c7dacfSAndrew Turner #include <machine/bus.h>
39b6c7dacfSAndrew Turner #include <machine/resource.h>
40b6c7dacfSAndrew Turner #include <machine/intr.h>
41b6c7dacfSAndrew Turner #include <sys/gpio.h>
42b6c7dacfSAndrew Turner
43b6c7dacfSAndrew Turner #include <dev/ofw/ofw_bus.h>
44b6c7dacfSAndrew Turner #include <dev/ofw/ofw_bus_subr.h>
45b6c7dacfSAndrew Turner
46b6c7dacfSAndrew Turner #include <arm/ti/ti_cpuid.h>
47b6c7dacfSAndrew Turner #include <arm/ti/ti_gpio.h>
485b03aba6SOleksandr Tymoshenko #include <arm/ti/ti_pinmux.h>
49b6c7dacfSAndrew Turner
50b6c7dacfSAndrew Turner #include <arm/ti/am335x/am335x_scm_padconf.h>
51b6c7dacfSAndrew Turner
52b6c7dacfSAndrew Turner #include "ti_gpio_if.h"
53b6c7dacfSAndrew Turner
54b6c7dacfSAndrew Turner static struct ofw_compat_data compat_data[] = {
55b6c7dacfSAndrew Turner {"ti,am335x-gpio", 1},
56b6c7dacfSAndrew Turner /* Linux uses ti,omap4-gpio on am335x so we need to support it */
57b6c7dacfSAndrew Turner {"ti,omap4-gpio", 1},
58b6c7dacfSAndrew Turner {"ti,gpio", 1},
59b6c7dacfSAndrew Turner {NULL, 0},
60b6c7dacfSAndrew Turner };
61b6c7dacfSAndrew Turner
62b6c7dacfSAndrew Turner static int
am335x_gpio_probe(device_t dev)63b6c7dacfSAndrew Turner am335x_gpio_probe(device_t dev)
64b6c7dacfSAndrew Turner {
65b6c7dacfSAndrew Turner
66b6c7dacfSAndrew Turner if (!ofw_bus_status_okay(dev))
67b6c7dacfSAndrew Turner return (ENXIO);
68b6c7dacfSAndrew Turner
69b6c7dacfSAndrew Turner if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
70b6c7dacfSAndrew Turner return (ENXIO);
71b6c7dacfSAndrew Turner
72cbfebd9aSOlivier Houchard if (ti_chip() != CHIP_AM335X)
73cbfebd9aSOlivier Houchard return (ENXIO);
74cbfebd9aSOlivier Houchard
7524e34f57SGavin Atkinson device_set_desc(dev, "TI AM335x General Purpose I/O (GPIO)");
76b6c7dacfSAndrew Turner
77b6c7dacfSAndrew Turner return (0);
78b6c7dacfSAndrew Turner }
79b6c7dacfSAndrew Turner
80b6c7dacfSAndrew Turner static int
am335x_gpio_set_flags(device_t dev,uint32_t gpio,uint32_t flags)81b6c7dacfSAndrew Turner am335x_gpio_set_flags(device_t dev, uint32_t gpio, uint32_t flags)
82b6c7dacfSAndrew Turner {
83b6c7dacfSAndrew Turner unsigned int state = 0;
845b03aba6SOleksandr Tymoshenko struct ti_gpio_softc *sc = device_get_softc(dev);
855b03aba6SOleksandr Tymoshenko
86b6c7dacfSAndrew Turner if (flags & GPIO_PIN_OUTPUT) {
87b6c7dacfSAndrew Turner if (flags & GPIO_PIN_PULLUP)
88b6c7dacfSAndrew Turner state = PADCONF_OUTPUT_PULLUP;
89b6c7dacfSAndrew Turner else
90b6c7dacfSAndrew Turner state = PADCONF_OUTPUT;
91b6c7dacfSAndrew Turner } else if (flags & GPIO_PIN_INPUT) {
92b6c7dacfSAndrew Turner if (flags & GPIO_PIN_PULLUP)
93b6c7dacfSAndrew Turner state = PADCONF_INPUT_PULLUP;
94b6c7dacfSAndrew Turner else if (flags & GPIO_PIN_PULLDOWN)
95b6c7dacfSAndrew Turner state = PADCONF_INPUT_PULLDOWN;
96b6c7dacfSAndrew Turner else
97b6c7dacfSAndrew Turner state = PADCONF_INPUT;
98b6c7dacfSAndrew Turner }
995b03aba6SOleksandr Tymoshenko return ti_pinmux_padconf_set_gpiomode(sc->sc_bank*32 + gpio, state);
100b6c7dacfSAndrew Turner }
101b6c7dacfSAndrew Turner
102b6c7dacfSAndrew Turner static int
am335x_gpio_get_flags(device_t dev,uint32_t gpio,uint32_t * flags)103b6c7dacfSAndrew Turner am335x_gpio_get_flags(device_t dev, uint32_t gpio, uint32_t *flags)
104b6c7dacfSAndrew Turner {
105b6c7dacfSAndrew Turner unsigned int state;
1065b03aba6SOleksandr Tymoshenko struct ti_gpio_softc *sc = device_get_softc(dev);
107b6c7dacfSAndrew Turner
1085b03aba6SOleksandr Tymoshenko if (ti_pinmux_padconf_get_gpiomode(sc->sc_bank*32 + gpio, &state) != 0) {
109b6c7dacfSAndrew Turner *flags = 0;
110b6c7dacfSAndrew Turner return (EINVAL);
111b6c7dacfSAndrew Turner } else {
112b6c7dacfSAndrew Turner switch (state) {
113b6c7dacfSAndrew Turner case PADCONF_OUTPUT:
114b6c7dacfSAndrew Turner *flags = GPIO_PIN_OUTPUT;
115b6c7dacfSAndrew Turner break;
116b6c7dacfSAndrew Turner case PADCONF_OUTPUT_PULLUP:
117b6c7dacfSAndrew Turner *flags = GPIO_PIN_OUTPUT | GPIO_PIN_PULLUP;
118b6c7dacfSAndrew Turner break;
119b6c7dacfSAndrew Turner case PADCONF_INPUT:
120b6c7dacfSAndrew Turner *flags = GPIO_PIN_INPUT;
121b6c7dacfSAndrew Turner break;
122b6c7dacfSAndrew Turner case PADCONF_INPUT_PULLUP:
123b6c7dacfSAndrew Turner *flags = GPIO_PIN_INPUT | GPIO_PIN_PULLUP;
124b6c7dacfSAndrew Turner break;
125b6c7dacfSAndrew Turner case PADCONF_INPUT_PULLDOWN:
126b6c7dacfSAndrew Turner *flags = GPIO_PIN_INPUT | GPIO_PIN_PULLDOWN;
127b6c7dacfSAndrew Turner break;
128b6c7dacfSAndrew Turner default:
129b6c7dacfSAndrew Turner *flags = 0;
130b6c7dacfSAndrew Turner break;
131b6c7dacfSAndrew Turner }
132b6c7dacfSAndrew Turner }
133b6c7dacfSAndrew Turner
134b6c7dacfSAndrew Turner return (0);
135b6c7dacfSAndrew Turner }
136b6c7dacfSAndrew Turner
137b6c7dacfSAndrew Turner static device_method_t am335x_gpio_methods[] = {
138b6c7dacfSAndrew Turner /* bus interface */
139b6c7dacfSAndrew Turner DEVMETHOD(device_probe, am335x_gpio_probe),
140b6c7dacfSAndrew Turner
141b6c7dacfSAndrew Turner /* ti_gpio interface */
142b6c7dacfSAndrew Turner DEVMETHOD(ti_gpio_set_flags, am335x_gpio_set_flags),
143b6c7dacfSAndrew Turner DEVMETHOD(ti_gpio_get_flags, am335x_gpio_get_flags),
144b6c7dacfSAndrew Turner
145b6c7dacfSAndrew Turner DEVMETHOD_END
146b6c7dacfSAndrew Turner };
147b6c7dacfSAndrew Turner
148b6c7dacfSAndrew Turner extern driver_t ti_gpio_driver;
149b6c7dacfSAndrew Turner
150b6c7dacfSAndrew Turner DEFINE_CLASS_1(gpio, am335x_gpio_driver, am335x_gpio_methods,
151b6c7dacfSAndrew Turner sizeof(struct ti_gpio_softc), ti_gpio_driver);
1528537e671SJohn Baldwin DRIVER_MODULE(am335x_gpio, simplebus, am335x_gpio_driver, 0, 0);
1530050ea24SMichal Meloun MODULE_DEPEND(am335x_gpio, ti_sysc, 1, 1, 1);
154