619 lines
15 KiB
C
619 lines
15 KiB
C
/*-
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* Copyright (c) 2010-2011, Aleksandr Rybalko <ray@ddteam.net>
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* Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
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* Copyright (c) 2009, Luiz Otavio O Souza.
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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 unmodified, this list of conditions, and the following
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* 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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/*
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* GPIO driver for RT305X SoC.
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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/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/gpio.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <mips/rt305x/rt305xreg.h>
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#include <mips/rt305x/rt305x_gpio.h>
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#include <mips/rt305x/rt305x_gpiovar.h>
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#include <mips/rt305x/rt305x_sysctlvar.h>
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#include "gpio_if.h"
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#ifdef notyet
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#define DEFAULT_CAPS (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT | GPIO_PIN_INVIN | \
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GPIO_PIN_INVOUT | GPIO_PIN_REPORT )
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#else
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#define DEFAULT_CAPS (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT | GPIO_PIN_INVIN | \
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GPIO_PIN_INVOUT )
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#endif
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/*
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* Helpers
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*/
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static void rt305x_gpio_pin_configure(struct rt305x_gpio_softc *sc,
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struct gpio_pin *pin, uint32_t flags);
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/*
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* Driver stuff
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*/
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static int rt305x_gpio_probe(device_t dev);
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static int rt305x_gpio_attach(device_t dev);
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static int rt305x_gpio_detach(device_t dev);
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static int rt305x_gpio_intr(void *arg);
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int rt305x_get_int_mask (device_t);
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void rt305x_set_int_mask (device_t, uint32_t);
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int rt305x_get_int_status(device_t);
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void rt305x_set_int_status(device_t, uint32_t);
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/*
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* GPIO interface
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*/
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static int rt305x_gpio_pin_max(device_t dev, int *maxpin);
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static int rt305x_gpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps);
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static int rt305x_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t
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*flags);
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static int rt305x_gpio_pin_getname(device_t dev, uint32_t pin, char *name);
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static int rt305x_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags);
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static int rt305x_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value);
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static int rt305x_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *val);
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static int rt305x_gpio_pin_toggle(device_t dev, uint32_t pin);
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static void
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rt305x_gpio_pin_configure(struct rt305x_gpio_softc *sc, struct gpio_pin *pin,
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unsigned int flags)
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{
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GPIO_LOCK(sc);
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/*
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* Manage input/output
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*/
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if (flags & (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)) {
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pin->gp_flags &= ~(GPIO_PIN_INPUT|GPIO_PIN_OUTPUT);
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if (flags & GPIO_PIN_OUTPUT) {
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pin->gp_flags |= GPIO_PIN_OUTPUT;
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GPIO_BIT_SET(sc, pin->gp_pin, DIR);
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}
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else {
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pin->gp_flags |= GPIO_PIN_INPUT;
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GPIO_BIT_CLR(sc, pin->gp_pin, DIR);
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}
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}
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if (flags & GPIO_PIN_INVOUT) {
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pin->gp_flags |= GPIO_PIN_INVOUT;
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GPIO_BIT_SET(sc, pin->gp_pin, POL);
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}
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else {
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pin->gp_flags &= ~GPIO_PIN_INVOUT;
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GPIO_BIT_CLR(sc, pin->gp_pin, POL);
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}
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if (flags & GPIO_PIN_INVIN) {
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pin->gp_flags |= GPIO_PIN_INVIN;
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GPIO_BIT_SET(sc, pin->gp_pin, POL);
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}
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else {
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pin->gp_flags &= ~GPIO_PIN_INVIN;
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GPIO_BIT_CLR(sc, pin->gp_pin, POL);
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}
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#ifdef notyet
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/* Enable interrupt bits for rising/falling transitions */
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if (flags & GPIO_PIN_REPORT) {
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pin->gp_flags |= GPIO_PIN_REPORT;
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GPIO_BIT_SET(sc, pin->gp_pin, RENA);
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GPIO_BIT_SET(sc, pin->gp_pin, FENA);
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device_printf(sc->dev, "Will report interrupt on pin %d\n",
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pin->gp_pin);
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}
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else {
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pin->gp_flags &= ~GPIO_PIN_REPORT;
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GPIO_BIT_CLR(sc, pin->gp_pin, RENA);
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GPIO_BIT_CLR(sc, pin->gp_pin, FENA);
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}
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#else
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/* Disable generating interrupts for now */
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GPIO_BIT_CLR(sc, pin->gp_pin, RENA);
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GPIO_BIT_CLR(sc, pin->gp_pin, FENA);
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#endif
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GPIO_UNLOCK(sc);
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}
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static int
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rt305x_gpio_pin_max(device_t dev, int *maxpin)
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{
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*maxpin = NGPIO - 1;
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return (0);
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}
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static int
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rt305x_gpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps)
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{
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struct rt305x_gpio_softc *sc = device_get_softc(dev);
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int i;
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for (i = 0; i < sc->gpio_npins; i++) {
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if (sc->gpio_pins[i].gp_pin == pin)
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break;
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}
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if (i >= sc->gpio_npins)
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return (EINVAL);
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GPIO_LOCK(sc);
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*caps = sc->gpio_pins[i].gp_caps;
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GPIO_UNLOCK(sc);
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return (0);
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}
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static int
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rt305x_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t *flags)
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{
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struct rt305x_gpio_softc *sc = device_get_softc(dev);
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int i;
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for (i = 0; i < sc->gpio_npins; i++) {
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if (sc->gpio_pins[i].gp_pin == pin)
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break;
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}
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if (i >= sc->gpio_npins)
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return (EINVAL);
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GPIO_LOCK(sc);
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*flags = sc->gpio_pins[i].gp_flags;
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GPIO_UNLOCK(sc);
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return (0);
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}
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static int
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rt305x_gpio_pin_getname(device_t dev, uint32_t pin, char *name)
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{
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struct rt305x_gpio_softc *sc = device_get_softc(dev);
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int i;
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for (i = 0; i < sc->gpio_npins; i++) {
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if (sc->gpio_pins[i].gp_pin == pin)
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break;
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}
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if (i >= sc->gpio_npins)
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return (EINVAL);
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GPIO_LOCK(sc);
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memcpy(name, sc->gpio_pins[i].gp_name, GPIOMAXNAME);
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GPIO_UNLOCK(sc);
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return (0);
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}
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static int
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rt305x_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
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{
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int i;
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struct rt305x_gpio_softc *sc = device_get_softc(dev);
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for (i = 0; i < sc->gpio_npins; i++) {
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if (sc->gpio_pins[i].gp_pin == pin)
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break;
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}
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if (i >= sc->gpio_npins)
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return (EINVAL);
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/* Filter out unwanted flags */
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if ((flags &= sc->gpio_pins[i].gp_caps) != flags)
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return (EINVAL);
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/* Can't mix input/output together */
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if ((flags & (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)) ==
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(GPIO_PIN_INPUT|GPIO_PIN_OUTPUT))
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return (EINVAL);
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rt305x_gpio_pin_configure(sc, &sc->gpio_pins[i], flags);
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return (0);
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}
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static int
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rt305x_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value)
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{
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struct rt305x_gpio_softc *sc = device_get_softc(dev);
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int i;
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for (i = 0; i < sc->gpio_npins; i++) {
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if (sc->gpio_pins[i].gp_pin == pin)
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break;
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}
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if (i >= sc->gpio_npins)
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return (EINVAL);
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GPIO_LOCK(sc);
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if (value) GPIO_BIT_SET(sc, i, DATA);
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else GPIO_BIT_CLR(sc, i, DATA);
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GPIO_UNLOCK(sc);
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return (0);
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}
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static int
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rt305x_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *val)
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{
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struct rt305x_gpio_softc *sc = device_get_softc(dev);
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int i;
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for (i = 0; i < sc->gpio_npins; i++) {
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if (sc->gpio_pins[i].gp_pin == pin)
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break;
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}
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if (i >= sc->gpio_npins)
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return (EINVAL);
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GPIO_LOCK(sc);
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*val = GPIO_BIT_GET(sc, i, DATA);
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GPIO_UNLOCK(sc);
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return (0);
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}
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static int
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rt305x_gpio_pin_toggle(device_t dev, uint32_t pin)
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{
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int i;
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struct rt305x_gpio_softc *sc = device_get_softc(dev);
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for (i = 0; i < sc->gpio_npins; i++) {
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if (sc->gpio_pins[i].gp_pin == pin)
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break;
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}
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if (i >= sc->gpio_npins)
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return (EINVAL);
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GPIO_LOCK(sc);
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GPIO_BIT_SET(sc, i, TOG);
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GPIO_UNLOCK(sc);
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return (0);
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}
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static int
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rt305x_gpio_intr(void *arg)
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{
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struct rt305x_gpio_softc *sc = arg;
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#ifdef notyet
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uint32_t i;
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#endif
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uint64_t input, value;
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#ifdef notyet
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uint64_t reset_pin;
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char notify[16];
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char pinname[6];
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#endif
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/* Read all reported pins */
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input = GPIO_READ_ALL(sc, INT);
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/* Clear int status */
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GPIO_WRITE_ALL(sc, INT, input);
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/* Clear report for OUTs */
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input &= ~GPIO_READ_ALL(sc, DIR);
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value = input & GPIO_READ_ALL(sc, DATA);
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if (!input) goto intr_done;
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#ifdef notyet
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/* if reset_gpio and this pin is input */
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if (sc->reset_gpio >= 0 && (input & (1 << sc->reset_gpio))) {
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/* get reset_gpio pin value */
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reset_pin = (value & (1 << sc->reset_gpio))?1:0;
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if ( sc->reset_gpio_last != reset_pin ) {
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/*
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* if now reset is high, check how long
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* and do reset if less than 2 seconds
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*/
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if ( reset_pin &&
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(time_uptime - sc->reset_gpio_ontime) < 2 )
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shutdown_nice(0);
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sc->reset_gpio_last = reset_pin;
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sc->reset_gpio_ontime = time_uptime;
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}
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}
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for ( i = 0; i < NGPIO; i ++ )
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{
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/* Next if output pin */
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if ( !(( input >> i) & 1) ) continue;
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if ( (((value & input) >> i) & 1) != sc->gpio_pins[i].gp_last )
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{
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/* !system=GPIO subsystem=pin7 type=PIN_HIGH period=3 */
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snprintf(notify , sizeof(notify ), "period=%d",
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(uint32_t)time_uptime - sc->gpio_pins[i].gp_time);
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snprintf(pinname, sizeof(pinname), "pin%02d", i);
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devctl_notify("GPIO", pinname,
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(((value & input) >> i) & 1)?"PIN_HIGH":"PIN_LOW",
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notify);
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printf("GPIO[%s] %s %s\n", pinname,
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(((value & input) >> i) & 1)?"PIN_HIGH":"PIN_LOW",
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notify);
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sc->gpio_pins[i].gp_last = ((value & input) >> i) & 1;
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sc->gpio_pins[i].gp_time = time_uptime;
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}
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}
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#endif
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intr_done:
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return (FILTER_HANDLED);
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}
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static int
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rt305x_gpio_probe(device_t dev)
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{
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device_set_desc(dev, "RT305X GPIO driver");
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return (0);
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}
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static uint64_t
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rt305x_gpio_init(device_t dev)
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{
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uint64_t avl = ~0ULL;
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uint32_t gmode = rt305x_sysctl_get(SYSCTL_GPIOMODE);
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if (!(gmode & SYSCTL_GPIOMODE_RGMII_GPIO_MODE))
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avl &= ~RGMII_GPIO_MODE_MASK;
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if (!(gmode & SYSCTL_GPIOMODE_SDRAM_GPIO_MODE))
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avl &= ~SDRAM_GPIO_MODE_MASK;
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if (!(gmode & SYSCTL_GPIOMODE_MDIO_GPIO_MODE))
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avl &= ~MDIO_GPIO_MODE_MASK;
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if (!(gmode & SYSCTL_GPIOMODE_JTAG_GPIO_MODE))
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avl &= ~JTAG_GPIO_MODE_MASK;
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if (!(gmode & SYSCTL_GPIOMODE_UARTL_GPIO_MODE))
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avl &= ~UARTL_GPIO_MODE_MASK;
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if (!(gmode & SYSCTL_GPIOMODE_SPI_GPIO_MODE))
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avl &= ~SPI_GPIO_MODE_MASK;
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if (!(gmode & SYSCTL_GPIOMODE_I2C_GPIO_MODE))
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avl &= ~I2C_GPIO_MODE_MASK;
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if ((gmode & SYSCTL_GPIOMODE_UARTF_SHARE_MODE_GPIO) !=
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SYSCTL_GPIOMODE_UARTF_SHARE_MODE_GPIO)
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avl &= ~I2C_GPIO_MODE_MASK;
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/* D-Link DAP-1350 Board have
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* MDIO_GPIO_MODE
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* UARTF_GPIO_MODE
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* SPI_GPIO_MODE
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* I2C_GPIO_MODE
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* So we have
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* 00000001 10000000 01111111 11111110
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*/
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return (avl);
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}
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#define DAP1350_RESET_GPIO 10
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static int
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rt305x_gpio_attach(device_t dev)
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{
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struct rt305x_gpio_softc *sc = device_get_softc(dev);
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int error = 0, i;
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uint64_t avlpins = 0;
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sc->reset_gpio = DAP1350_RESET_GPIO;
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KASSERT((device_get_unit(dev) == 0),
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("rt305x_gpio_gpio: Only one gpio module supported"));
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mtx_init(&sc->gpio_mtx, device_get_nameunit(dev), NULL, MTX_DEF);
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/* Map control/status registers. */
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sc->gpio_mem_rid = 0;
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sc->gpio_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
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&sc->gpio_mem_rid, RF_ACTIVE);
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if (sc->gpio_mem_res == NULL) {
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device_printf(dev, "couldn't map memory\n");
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error = ENXIO;
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rt305x_gpio_detach(dev);
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return(error);
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}
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if ((sc->gpio_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
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&sc->gpio_irq_rid, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
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device_printf(dev, "unable to allocate IRQ resource\n");
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return (ENXIO);
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}
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if ((bus_setup_intr(dev, sc->gpio_irq_res, INTR_TYPE_MISC,
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/* rt305x_gpio_filter, */
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rt305x_gpio_intr, NULL, sc, &sc->gpio_ih))) {
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device_printf(dev,
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"WARNING: unable to register interrupt handler\n");
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return (ENXIO);
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}
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sc->dev = dev;
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avlpins = rt305x_gpio_init(dev);
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/* Configure all pins as input */
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/* disable interrupts for all pins */
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/* TODO */
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sc->gpio_npins = NGPIO;
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resource_int_value(device_get_name(dev), device_get_unit(dev),
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"pins", &sc->gpio_npins);
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for (i = 0; i < sc->gpio_npins; i++) {
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sc->gpio_pins[i].gp_pin = i;
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sc->gpio_pins[i].gp_caps = DEFAULT_CAPS;
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sc->gpio_pins[i].gp_flags = 0;
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}
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/* Setup reset pin interrupt */
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if (TUNABLE_INT_FETCH("reset_gpio", &sc->reset_gpio)) {
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device_printf(dev, "\tHinted reset_gpio %d\n", sc->reset_gpio);
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}
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#ifdef notyet
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if (sc->reset_gpio != -1) {
|
|
rt305x_gpio_pin_setflags(dev, sc->reset_gpio,
|
|
GPIO_PIN_INPUT|GPIO_PIN_INVOUT|
|
|
GPIO_PIN_INVOUT|GPIO_PIN_REPORT);
|
|
device_printf(dev, "\tUse reset_gpio %d\n", sc->reset_gpio);
|
|
}
|
|
#else
|
|
if (sc->reset_gpio != -1) {
|
|
rt305x_gpio_pin_setflags(dev, sc->reset_gpio,
|
|
GPIO_PIN_INPUT|GPIO_PIN_INVOUT);
|
|
device_printf(dev, "\tUse reset_gpio %d\n", sc->reset_gpio);
|
|
}
|
|
#endif
|
|
|
|
device_add_child(dev, "gpioc", device_get_unit(dev));
|
|
device_add_child(dev, "gpiobus", device_get_unit(dev));
|
|
|
|
|
|
return (bus_generic_attach(dev));
|
|
}
|
|
|
|
static int
|
|
rt305x_gpio_detach(device_t dev)
|
|
{
|
|
struct rt305x_gpio_softc *sc = device_get_softc(dev);
|
|
|
|
KASSERT(mtx_initialized(&sc->gpio_mtx), ("gpio mutex not initialized"));
|
|
|
|
bus_generic_detach(dev);
|
|
|
|
if (sc->gpio_mem_res)
|
|
bus_release_resource(dev, SYS_RES_MEMORY, sc->gpio_mem_rid,
|
|
sc->gpio_mem_res);
|
|
|
|
mtx_destroy(&sc->gpio_mtx);
|
|
|
|
return(0);
|
|
}
|
|
|
|
#ifdef notyet
|
|
static struct resource *
|
|
rt305x_gpio_alloc_resource(device_t bus, device_t child, int type, int *rid,
|
|
u_long start, u_long end, u_long count, u_int flags)
|
|
{
|
|
struct obio_softc *sc = device_get_softc(bus);
|
|
struct resource *rv;
|
|
struct rman *rm;
|
|
|
|
switch (type) {
|
|
case SYS_RES_GPIO:
|
|
rm = &sc->gpio_rman;
|
|
break;
|
|
default:
|
|
printf("%s: unknown resource type %d\n", __func__, type);
|
|
return (0);
|
|
}
|
|
|
|
rv = rman_reserve_resource(rm, start, end, count, flags, child);
|
|
if (rv == 0) {
|
|
printf("%s: could not reserve resource\n", __func__);
|
|
return (0);
|
|
}
|
|
|
|
rman_set_rid(rv, *rid);
|
|
|
|
return (rv);
|
|
}
|
|
|
|
static int
|
|
rt305x_gpio_activate_resource(device_t bus, device_t child, int type, int rid,
|
|
struct resource *r)
|
|
{
|
|
|
|
return (rman_activate_resource(r));
|
|
}
|
|
|
|
static int
|
|
rt305x_gpio_deactivate_resource(device_t bus, device_t child, int type, int rid,
|
|
struct resource *r)
|
|
{
|
|
|
|
return (rman_deactivate_resource(r));
|
|
}
|
|
|
|
static int
|
|
rt305x_gpio_release_resource(device_t dev, device_t child, int type,
|
|
int rid, struct resource *r)
|
|
{
|
|
rman_release_resource(r);
|
|
return (0);
|
|
}
|
|
#endif
|
|
|
|
static device_method_t rt305x_gpio_methods[] = {
|
|
DEVMETHOD(device_probe, rt305x_gpio_probe),
|
|
DEVMETHOD(device_attach, rt305x_gpio_attach),
|
|
DEVMETHOD(device_detach, rt305x_gpio_detach),
|
|
|
|
/* GPIO protocol */
|
|
DEVMETHOD(gpio_pin_max, rt305x_gpio_pin_max),
|
|
DEVMETHOD(gpio_pin_getname, rt305x_gpio_pin_getname),
|
|
DEVMETHOD(gpio_pin_getflags, rt305x_gpio_pin_getflags),
|
|
DEVMETHOD(gpio_pin_getcaps, rt305x_gpio_pin_getcaps),
|
|
DEVMETHOD(gpio_pin_setflags, rt305x_gpio_pin_setflags),
|
|
DEVMETHOD(gpio_pin_get, rt305x_gpio_pin_get),
|
|
DEVMETHOD(gpio_pin_set, rt305x_gpio_pin_set),
|
|
DEVMETHOD(gpio_pin_toggle, rt305x_gpio_pin_toggle),
|
|
{0, 0},
|
|
};
|
|
|
|
static driver_t rt305x_gpio_driver = {
|
|
"gpio",
|
|
rt305x_gpio_methods,
|
|
sizeof(struct rt305x_gpio_softc),
|
|
};
|
|
static devclass_t rt305x_gpio_devclass;
|
|
|
|
DRIVER_MODULE(rt305x_gpio, obio, rt305x_gpio_driver,
|
|
rt305x_gpio_devclass, 0, 0);
|