5b03aba6c8
files to vendor-provided ones. It should make easier to adopt platform code to new revisions of hardware and to use DTS overlays for various Beaglebone extensions (shields/capes). Original dts filenames were not changed, they're now wrappers over dts files provided by TI. So make sure you update .dtb files on your devices as part of kernel update GPIO addressing was changed: instead of one global /dev/gpioc0 there are per-bank instances of /dev/gpiocX. Each bank has 32 pins so for instance pin 121 on /dev/gpioc0 in old addressing scheme is now pin 25 on /dev/gpioc3 On Pandaboard serial console devices was changed from /dev/ttyu0 to /dev/ttyu2 so you'll have to update /etc/ttys to get login prompt on serial port in multiuser mode. Single user mode serial console should work as-is Differential Revision: https://reviews.freebsd.org/D2146 Reviewed by: rpaulo, ian, Michal Meloun, Svatopluk Kraus
160 lines
4.4 KiB
C
160 lines
4.4 KiB
C
/*-
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* Copyright (c) 2012 Damjan Marion <dmarion@FreeBSD.org>
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* Copyright (c) 2014 Andrew Turner <andrew@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/resource.h>
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#include <sys/rman.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <machine/bus.h>
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#include <machine/cpu.h>
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#include <machine/cpufunc.h>
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#include <machine/resource.h>
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#include <machine/intr.h>
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#include <sys/gpio.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <arm/ti/ti_cpuid.h>
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#include <arm/ti/ti_gpio.h>
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#include <arm/ti/ti_pinmux.h>
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#include <arm/ti/am335x/am335x_scm_padconf.h>
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#include "ti_gpio_if.h"
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static struct ofw_compat_data compat_data[] = {
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{"ti,am335x-gpio", 1},
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/* Linux uses ti,omap4-gpio on am335x so we need to support it */
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{"ti,omap4-gpio", 1},
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{"ti,gpio", 1},
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{NULL, 0},
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};
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static int
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am335x_gpio_probe(device_t dev)
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{
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if (ti_chip() != CHIP_AM335X)
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return (ENXIO);
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
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return (ENXIO);
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device_set_desc(dev, "Ti AM335x General Purpose I/O (GPIO)");
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return (0);
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}
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static int
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am335x_gpio_set_flags(device_t dev, uint32_t gpio, uint32_t flags)
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{
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unsigned int state = 0;
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struct ti_gpio_softc *sc = device_get_softc(dev);
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if (flags & GPIO_PIN_OUTPUT) {
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if (flags & GPIO_PIN_PULLUP)
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state = PADCONF_OUTPUT_PULLUP;
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else
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state = PADCONF_OUTPUT;
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} else if (flags & GPIO_PIN_INPUT) {
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if (flags & GPIO_PIN_PULLUP)
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state = PADCONF_INPUT_PULLUP;
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else if (flags & GPIO_PIN_PULLDOWN)
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state = PADCONF_INPUT_PULLDOWN;
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else
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state = PADCONF_INPUT;
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}
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return ti_pinmux_padconf_set_gpiomode(sc->sc_bank*32 + gpio, state);
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}
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static int
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am335x_gpio_get_flags(device_t dev, uint32_t gpio, uint32_t *flags)
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{
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unsigned int state;
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struct ti_gpio_softc *sc = device_get_softc(dev);
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if (ti_pinmux_padconf_get_gpiomode(sc->sc_bank*32 + gpio, &state) != 0) {
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*flags = 0;
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return (EINVAL);
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} else {
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switch (state) {
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case PADCONF_OUTPUT:
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*flags = GPIO_PIN_OUTPUT;
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break;
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case PADCONF_OUTPUT_PULLUP:
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*flags = GPIO_PIN_OUTPUT | GPIO_PIN_PULLUP;
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break;
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case PADCONF_INPUT:
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*flags = GPIO_PIN_INPUT;
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break;
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case PADCONF_INPUT_PULLUP:
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*flags = GPIO_PIN_INPUT | GPIO_PIN_PULLUP;
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break;
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case PADCONF_INPUT_PULLDOWN:
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*flags = GPIO_PIN_INPUT | GPIO_PIN_PULLDOWN;
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break;
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default:
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*flags = 0;
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break;
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}
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}
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return (0);
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}
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static device_method_t am335x_gpio_methods[] = {
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/* bus interface */
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DEVMETHOD(device_probe, am335x_gpio_probe),
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/* ti_gpio interface */
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DEVMETHOD(ti_gpio_set_flags, am335x_gpio_set_flags),
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DEVMETHOD(ti_gpio_get_flags, am335x_gpio_get_flags),
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DEVMETHOD_END
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};
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extern driver_t ti_gpio_driver;
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static devclass_t am335x_gpio_devclass;
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DEFINE_CLASS_1(gpio, am335x_gpio_driver, am335x_gpio_methods,
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sizeof(struct ti_gpio_softc), ti_gpio_driver);
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DRIVER_MODULE(am335x_gpio, simplebus, am335x_gpio_driver, am335x_gpio_devclass,
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0, 0);
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