Author: jhibbits
Date: Mon Nov 30 02:23:56 2015
New Revision: 291462
URL: https://svnweb.freebsd.org/changeset/base/291462
Log:
Add Freescale QorIQ GPIO driver.
Still missing interrupt support, to come later.
Sponsored by: Alex Perez/Inertial Computing
Added:
head/sys/powerpc/mpc85xx/qoriq_gpio.c (contents, props changed)
Modified:
head/sys/conf/files.powerpc
Modified: head/sys/conf/files.powerpc
==============================================================================
--- head/sys/conf/files.powerpc Sun Nov 29 22:37:48 2015 (r291461)
+++ head/sys/conf/files.powerpc Mon Nov 30 02:23:56 2015 (r291462)
@@ -142,6 +142,7 @@ powerpc/mpc85xx/mpc85xx_gpio.c optional
powerpc/mpc85xx/platform_mpc85xx.c optional mpc85xx | qoriq_dpaa
powerpc/mpc85xx/pci_mpc85xx.c optional pci mpc85xx | pci qoriq_dpaa
powerpc/mpc85xx/pci_mpc85xx_pcib.c optional pci mpc85xx | pci
qoriq_dpaa
+powerpc/mpc85xx/qoriq_gpio.c optional mpc85xx gpio | qoriq_dpaa gpio
powerpc/ofw/ofw_machdep.c standard
powerpc/ofw/ofw_pci.c optional pci
powerpc/ofw/ofw_pcibus.c optional pci
Added: head/sys/powerpc/mpc85xx/qoriq_gpio.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/powerpc/mpc85xx/qoriq_gpio.c Mon Nov 30 02:23:56 2015
(r291462)
@@ -0,0 +1,309 @@
+/*-
+ * Copyright (c) 2015 Justin Hibbits
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/conf.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/mutex.h>
+#include <sys/rman.h>
+#include <sys/gpio.h>
+
+#include <machine/bus.h>
+#include <machine/resource.h>
+#include <machine/stdarg.h>
+
+#include <dev/gpio/gpiobusvar.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include "gpio_if.h"
+
+#define MAXPIN (31)
+
+#define VALID_PIN(u) ((u) >= 0 && (u) <= MAXPIN)
+
+#define GPIO_LOCK(sc) mtx_lock(&(sc)->sc_mtx)
+#define GPIO_UNLOCK(sc) mtx_unlock(&(sc)->sc_mtx)
+#define GPIO_LOCK_INIT(sc) \
+ mtx_init(&(sc)->sc_mtx, device_get_nameunit((sc)->dev), \
+ "gpio", MTX_DEF)
+#define GPIO_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx);
+
+#define GPIO_GPDIR 0x0
+#define GPIO_GPODR 0x4
+#define GPIO_GPDAT 0x8
+#define GPIO_GPIER 0xc
+#define GPIO_GPIMR 0x10
+#define GPIO_GPICR 0x14
+
+
+struct qoriq_gpio_softc {
+ device_t dev;
+ device_t busdev;
+ struct mtx sc_mtx;
+ struct resource *sc_mem; /* Memory resource */
+};
+
+static device_t
+qoriq_gpio_get_bus(device_t dev)
+{
+ struct qoriq_gpio_softc *sc;
+
+ sc = device_get_softc(dev);
+
+ return (sc->busdev);
+}
+
+static int
+qoriq_gpio_pin_max(device_t dev, int *maxpin)
+{
+
+ *maxpin = MAXPIN;
+ return (0);
+}
+
+/* Get a specific pin's capabilities. */
+static int
+qoriq_gpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps)
+{
+
+ if (!VALID_PIN(pin))
+ return (EINVAL);
+
+ *caps = (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT | GPIO_PIN_OPENDRAIN);
+
+ return (0);
+}
+
+/* Get a specific pin's name. */
+static int
+qoriq_gpio_pin_getname(device_t dev, uint32_t pin, char *name)
+{
+
+ if (!VALID_PIN(pin))
+ return (EINVAL);
+
+ snprintf(name, GPIOMAXNAME, "qoriq_gpio%d.%d",
+ device_get_unit(dev), pin);
+ name[GPIOMAXNAME-1] = '\0';
+
+ return (0);
+}
+
+/* Set flags for the pin. */
+static int
+qoriq_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
+{
+ struct qoriq_gpio_softc *sc = device_get_softc(dev);
+ uint32_t reg;
+
+ if (!VALID_PIN(pin))
+ return (EINVAL);
+
+ if ((flags & (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT)) ==
+ (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT))
+ return (EINVAL);
+
+ GPIO_LOCK(sc);
+ if (flags & GPIO_PIN_INPUT) {
+ reg = bus_read_4(sc->sc_mem, GPIO_GPDIR);
+ reg &= ~(1 << (31 - pin));
+ bus_write_4(sc->sc_mem, GPIO_GPDIR, reg);
+ }
+ else if (flags & GPIO_PIN_OUTPUT) {
+ reg = bus_read_4(sc->sc_mem, GPIO_GPDIR);
+ reg |= (1 << (31 - pin));
+ bus_write_4(sc->sc_mem, GPIO_GPDIR, reg);
+ reg = bus_read_4(sc->sc_mem, GPIO_GPODR);
+ if (flags & GPIO_PIN_OPENDRAIN)
+ reg |= (1 << (31 - pin));
+ else
+ reg &= ~(1 << (31 - pin));
+ bus_write_4(sc->sc_mem, GPIO_GPODR, reg);
+ }
+ GPIO_UNLOCK(sc);
+ return (0);
+}
+
+/* Set a specific output pin's value. */
+static int
+qoriq_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value)
+{
+ struct qoriq_gpio_softc *sc = device_get_softc(dev);
+ uint32_t outvals;
+ uint8_t pinbit;
+
+ if (!VALID_PIN(pin) || value > 1)
+ return (EINVAL);
+
+ GPIO_LOCK(sc);
+ pinbit = 31 - pin;
+
+ outvals = bus_read_4(sc->sc_mem, GPIO_GPDAT);
+ outvals &= ~(1 << pinbit);
+ outvals |= (value << pinbit);
+ bus_write_4(sc->sc_mem, 0, outvals);
+
+ GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+/* Get a specific pin's input value. */
+static int
+qoriq_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *value)
+{
+ struct qoriq_gpio_softc *sc = device_get_softc(dev);
+
+ if (!VALID_PIN(pin))
+ return (EINVAL);
+
+ *value = (bus_read_4(sc->sc_mem, GPIO_GPDAT) >> (31 - pin)) & 1;
+
+ return (0);
+}
+
+/* Toggle a pin's output value. */
+static int
+qoriq_gpio_pin_toggle(device_t dev, uint32_t pin)
+{
+ struct qoriq_gpio_softc *sc = device_get_softc(dev);
+ uint32_t val;
+
+ if (!VALID_PIN(pin))
+ return (EINVAL);
+
+ GPIO_LOCK(sc);
+
+ val = bus_read_4(sc->sc_mem, GPIO_GPDAT);
+ val ^= (1 << (31 - pin));
+ bus_write_4(sc->sc_mem, 0, val);
+
+ GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+qoriq_gpio_probe(device_t dev)
+{
+
+ if (!ofw_bus_is_compatible(dev, "fsl,qoriq-gpio"))
+ return (ENXIO);
+
+ device_set_desc(dev, "Freescale QorIQ GPIO driver");
+
+ return (0);
+}
+
+static int qoriq_gpio_detach(device_t dev);
+
+static int
+qoriq_gpio_attach(device_t dev)
+{
+ struct qoriq_gpio_softc *sc = device_get_softc(dev);
+ int rid;
+
+ sc->dev = dev;
+
+ GPIO_LOCK_INIT(sc);
+
+ /* Allocate memory. */
+ rid = 0;
+ sc->sc_mem = bus_alloc_resource_any(dev,
+ SYS_RES_MEMORY, &rid, RF_ACTIVE);
+ if (sc->sc_mem == NULL) {
+ device_printf(dev, "Can't allocate memory for device output
port");
+ qoriq_gpio_detach(dev);
+ return (ENOMEM);
+ }
+
+ sc->busdev = gpiobus_attach_bus(dev);
+ if (sc->busdev == NULL) {
+ qoriq_gpio_detach(dev);
+ return (ENOMEM);
+ }
+
+ OF_device_register_xref(OF_xref_from_node(ofw_bus_get_node(dev)), dev);
+
+ return (0);
+}
+
+static int
+qoriq_gpio_detach(device_t dev)
+{
+ struct qoriq_gpio_softc *sc = device_get_softc(dev);
+
+ gpiobus_detach_bus(dev);
+
+ if (sc->sc_mem != NULL) {
+ /* Release output port resource. */
+ bus_release_resource(dev, SYS_RES_MEMORY,
+ rman_get_rid(sc->sc_mem), sc->sc_mem);
+ }
+
+ GPIO_LOCK_DESTROY(sc);
+
+ return (0);
+}
+
+static device_method_t qoriq_gpio_methods[] = {
+ /* device_if */
+ DEVMETHOD(device_probe, qoriq_gpio_probe),
+ DEVMETHOD(device_attach, qoriq_gpio_attach),
+ DEVMETHOD(device_detach, qoriq_gpio_detach),
+
+ /* GPIO protocol */
+ DEVMETHOD(gpio_get_bus, qoriq_gpio_get_bus),
+ DEVMETHOD(gpio_pin_max, qoriq_gpio_pin_max),
+ DEVMETHOD(gpio_pin_getname, qoriq_gpio_pin_getname),
+ DEVMETHOD(gpio_pin_getcaps, qoriq_gpio_pin_getcaps),
+ DEVMETHOD(gpio_pin_get, qoriq_gpio_pin_get),
+ DEVMETHOD(gpio_pin_set, qoriq_gpio_pin_set),
+ DEVMETHOD(gpio_pin_setflags, qoriq_gpio_pin_setflags),
+ DEVMETHOD(gpio_pin_toggle, qoriq_gpio_pin_toggle),
+
+ DEVMETHOD_END
+};
+
+static driver_t qoriq_gpio_driver = {
+ "gpio",
+ qoriq_gpio_methods,
+ sizeof(struct qoriq_gpio_softc),
+};
+static devclass_t qoriq_gpio_devclass;
+
+EARLY_DRIVER_MODULE(qoriq_gpio, simplebus, qoriq_gpio_driver,
+ qoriq_gpio_devclass, NULL, NULL,
+ BUS_PASS_RESOURCE + BUS_PASS_ORDER_MIDDLE);
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