svn commit: r213237 - in head/sys: conf dev/gpio sys
Oleksandr Tymoshenko
gonzo at FreeBSD.org
Tue Sep 28 03:24:54 UTC 2010
Author: gonzo
Date: Tue Sep 28 03:24:53 2010
New Revision: 213237
URL: http://svn.freebsd.org/changeset/base/213237
Log:
Initial GPIO bus support. Includes:
- GPIO bus controller interface
- GPIO bus interface
- Implementation of GPIO led(4) compatible device
- Implementation of iic(4) bus over GPIO (author: Luiz Otavio O Souza)
Tested by: Luiz Otavio O Souza, Alexandr Rybalko
Added:
head/sys/dev/gpio/
head/sys/dev/gpio/gpio_if.m (contents, props changed)
head/sys/dev/gpio/gpiobus.c (contents, props changed)
head/sys/dev/gpio/gpiobus_if.m (contents, props changed)
head/sys/dev/gpio/gpiobusvar.h (contents, props changed)
head/sys/dev/gpio/gpioc.c (contents, props changed)
head/sys/dev/gpio/gpioiic.c (contents, props changed)
head/sys/dev/gpio/gpioled.c (contents, props changed)
head/sys/sys/gpio.h (contents, props changed)
Modified:
head/sys/conf/files
Modified: head/sys/conf/files
==============================================================================
--- head/sys/conf/files Tue Sep 28 01:36:01 2010 (r213236)
+++ head/sys/conf/files Tue Sep 28 03:24:53 2010 (r213237)
@@ -1010,6 +1010,14 @@ dev/fxp/if_fxp.c optional fxp inet
dev/gem/if_gem.c optional gem
dev/gem/if_gem_pci.c optional gem pci
dev/gem/if_gem_sbus.c optional gem sbus
+dev/gpio/gpiobus.c optional gpio \
+ dependency "gpiobus_if.h"
+dev/gpio/gpioc.c optional gpio \
+ dependency "gpio_if.h"
+dev/gpio/gpioiic.c optional gpioiic
+dev/gpio/gpioled.c optional gpioled
+dev/gpio/gpio_if.m optional gpio
+dev/gpio/gpiobus_if.m optional gpio
dev/hatm/if_hatm.c optional hatm pci
dev/hatm/if_hatm_intr.c optional hatm pci
dev/hatm/if_hatm_ioctl.c optional hatm pci
Added: head/sys/dev/gpio/gpio_if.m
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/gpio/gpio_if.m Tue Sep 28 03:24:53 2010 (r213237)
@@ -0,0 +1,102 @@
+#-
+# Copyright (c) 2009 Oleksandr Tymoshenko <gonzo at freebsd.org>
+# 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/bus.h>
+#include <sys/gpio.h>
+
+INTERFACE gpio;
+
+#
+# Get total number of pins
+#
+METHOD int pin_max {
+ device_t dev;
+ int *npins;
+};
+
+#
+# Set value of pin specifed by pin_num
+#
+METHOD int pin_set {
+ device_t dev;
+ uint32_t pin_num;
+ uint32_t pin_value;
+};
+
+#
+# Get value of pin specifed by pin_num
+#
+METHOD int pin_get {
+ device_t dev;
+ uint32_t pin_num;
+ uint32_t *pin_value;
+};
+
+#
+# Toggle value of pin specifed by pin_num
+#
+METHOD int pin_toggle {
+ device_t dev;
+ uint32_t pin_num;
+};
+
+#
+# Get pin capabilities
+#
+METHOD int pin_getcaps {
+ device_t dev;
+ uint32_t pin_num;
+ uint32_t *caps;
+};
+
+#
+# Get pin flags
+#
+METHOD int pin_getflags {
+ device_t dev;
+ uint32_t pin_num;
+ uint32_t *flags;
+};
+
+#
+# Get pin name
+#
+METHOD int pin_getname {
+ device_t dev;
+ uint32_t pin_num;
+ char *name;
+};
+
+#
+# Set current configuration and capabilities
+#
+METHOD int pin_setflags {
+ device_t dev;
+ uint32_t pin_num;
+ uint32_t flags;
+};
Added: head/sys/dev/gpio/gpiobus.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/gpio/gpiobus.c Tue Sep 28 03:24:53 2010 (r213237)
@@ -0,0 +1,492 @@
+/*-
+ * Copyright (c) 2009 Oleksandr Tymoshenko <gonzo at freebsd.org>
+ * 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 ``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 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/module.h>
+#include <sys/kernel.h>
+#include <sys/queue.h>
+#include <sys/sysctl.h>
+#include <sys/types.h>
+
+#include <sys/bus.h>
+#include <machine/bus.h>
+#include <sys/rman.h>
+#include <machine/resource.h>
+
+#include <sys/gpio.h>
+#include <dev/gpio/gpiobusvar.h>
+#include "gpio_if.h"
+#include "gpiobus_if.h"
+
+static void gpiobus_print_pins(struct gpiobus_ivar *);
+static int gpiobus_parse_pins(struct gpiobus_softc *, device_t, int);
+static int gpiobus_probe(device_t);
+static int gpiobus_attach(device_t);
+static int gpiobus_detach(device_t);
+static int gpiobus_suspend(device_t);
+static int gpiobus_resume(device_t);
+static int gpiobus_print_child(device_t, device_t);
+static int gpiobus_child_location_str(device_t, device_t, char *, size_t);
+static int gpiobus_child_pnpinfo_str(device_t, device_t, char *, size_t);
+static device_t gpiobus_add_child(device_t, u_int, const char *, int);
+static void gpiobus_hinted_child(device_t, const char *, int);
+
+/*
+ * GPIOBUS interface
+ */
+static void gpiobus_lock_bus(device_t);
+static void gpiobus_unlock_bus(device_t);
+static void gpiobus_acquire_bus(device_t, device_t);
+static void gpiobus_release_bus(device_t, device_t);
+static int gpiobus_pin_setflags(device_t, device_t, uint32_t, uint32_t);
+static int gpiobus_pin_getflags(device_t, device_t, uint32_t, uint32_t*);
+static int gpiobus_pin_getcaps(device_t, device_t, uint32_t, uint32_t*);
+static int gpiobus_pin_set(device_t, device_t, uint32_t, unsigned int);
+static int gpiobus_pin_get(device_t, device_t, uint32_t, unsigned int*);
+static int gpiobus_pin_toggle(device_t, device_t, uint32_t);
+
+#define GPIOBUS_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
+#define GPIOBUS_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
+#define GPIOBUS_LOCK_INIT(_sc) \
+ mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->sc_dev), \
+ "gpiobus", MTX_DEF)
+#define GPIOBUS_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx);
+#define GPIOBUS_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED);
+#define GPIOBUS_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED);
+
+
+static void
+gpiobus_print_pins(struct gpiobus_ivar *devi)
+{
+ int range_start, range_stop, need_coma;
+ int i;
+
+ if (devi->npins == 0)
+ return;
+
+ need_coma = 0;
+ range_start = range_stop = devi->pins[0];
+ for (i = 1; i < devi->npins; i++) {
+ if (devi->pins[i] != (range_stop + 1)) {
+ if (need_coma)
+ printf(",");
+ if (range_start != range_stop)
+ printf("%d-%d", range_start, range_stop);
+ else
+ printf("%d", range_start);
+
+ range_start = range_stop = devi->pins[i];
+ need_coma = 1;
+ }
+ else
+ range_stop++;
+ }
+
+ if (need_coma)
+ printf(",");
+ if (range_start != range_stop)
+ printf("%d-%d", range_start, range_stop);
+ else
+ printf("%d", range_start);
+}
+
+static int
+gpiobus_parse_pins(struct gpiobus_softc *sc, device_t child, int mask)
+{
+ struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
+ int i, npins;
+
+ npins = 0;
+ for (i = 0; i < 32; i++) {
+ if (mask & (1 << i))
+ npins++;
+ }
+
+ if (npins == 0) {
+ device_printf(child, "empty pin mask");
+ return (EINVAL);
+ }
+
+ devi->npins = npins;
+ devi->pins = malloc(sizeof(uint32_t) * devi->npins, M_DEVBUF,
+ M_NOWAIT | M_ZERO);
+
+ if (!devi->pins)
+ return (ENOMEM);
+
+ npins = 0;
+ for (i = 0; i < 32; i++) {
+
+ if ((mask & (1 << i)) == 0)
+ continue;
+
+ if (i >= sc->sc_npins) {
+ device_printf(child,
+ "invalid pin %d, max: %d\n", i, sc->sc_npins - 1);
+ return (EINVAL);
+ }
+
+ devi->pins[npins++] = i;
+ /*
+ * Mark pin as mapped and give warning if it's already mapped
+ */
+ if (sc->sc_pins_mapped[i]) {
+ device_printf(child,
+ "warning: pin %d is already mapped\n", i);
+ return (EINVAL);
+ }
+ sc->sc_pins_mapped[i] = 1;
+ }
+
+ return (0);
+}
+
+static int
+gpiobus_probe(device_t dev)
+{
+ device_set_desc(dev, "GPIO bus");
+ return (0);
+}
+
+static int
+gpiobus_attach(device_t dev)
+{
+ struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
+ int res;
+
+ sc->sc_busdev = dev;
+ sc->sc_dev = device_get_parent(dev);
+ res = GPIO_PIN_MAX(sc->sc_dev, &sc->sc_npins);
+ if (res)
+ return (ENXIO);
+
+ /*
+ * Increase to get number of pins
+ */
+ sc->sc_npins++;
+
+ KASSERT(sc->sc_npins != 0, ("GPIO device with no pins"));
+
+ sc->sc_pins_mapped = malloc(sizeof(int) * sc->sc_npins, M_DEVBUF,
+ M_NOWAIT | M_ZERO);
+
+ if (!sc->sc_pins_mapped)
+ return (ENOMEM);
+
+ /* init bus lock */
+ GPIOBUS_LOCK_INIT(sc);
+
+ /*
+ * Get parent's pins and mark them as unmapped
+ */
+ bus_enumerate_hinted_children(dev);
+ return (bus_generic_attach(dev));
+}
+
+/*
+ * Since this is not a self-enumerating bus, and since we always add
+ * children in attach, we have to always delete children here.
+ */
+static int
+gpiobus_detach(device_t dev)
+{
+ struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
+ int err, ndevs, i;
+ device_t *devlist;
+
+ KASSERT(mtx_initialized(&sc->sc_mtx),
+ ("gpiobus mutex not initialized"));
+ GPIOBUS_LOCK_DESTROY(sc);
+
+ if ((err = bus_generic_detach(dev)) != 0)
+ return (err);
+ if ((err = device_get_children(dev, &devlist, &ndevs)) != 0)
+ return (err);
+ for (i = 0; i < ndevs; i++)
+ device_delete_child(dev, devlist[i]);
+
+ if (sc->sc_pins_mapped) {
+ free(sc->sc_pins_mapped, M_DEVBUF);
+ sc->sc_pins_mapped = NULL;
+ }
+ free(devlist, M_TEMP);
+
+ return (0);
+}
+
+static int
+gpiobus_suspend(device_t dev)
+{
+
+ return (bus_generic_suspend(dev));
+}
+
+static int
+gpiobus_resume(device_t dev)
+{
+
+ return (bus_generic_resume(dev));
+}
+
+static int
+gpiobus_print_child(device_t dev, device_t child)
+{
+ struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
+ int retval = 0;
+
+ retval += bus_print_child_header(dev, child);
+ retval += printf(" at pin(s) ");
+ gpiobus_print_pins(devi);
+ retval += bus_print_child_footer(dev, child);
+
+ return (retval);
+}
+
+static int
+gpiobus_child_location_str(device_t bus, device_t child, char *buf,
+ size_t buflen)
+{
+ // struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
+
+ snprintf(buf, buflen, "pins=?");
+ return (0);
+}
+
+static int
+gpiobus_child_pnpinfo_str(device_t bus, device_t child, char *buf,
+ size_t buflen)
+{
+
+ *buf = '\0';
+ return (0);
+}
+
+static device_t
+gpiobus_add_child(device_t dev, u_int order, const char *name, int unit)
+{
+ device_t child;
+ struct gpiobus_ivar *devi;
+
+ child = device_add_child_ordered(dev, order, name, unit);
+ if (child == NULL)
+ return (child);
+ devi = malloc(sizeof(struct gpiobus_ivar), M_DEVBUF, M_NOWAIT | M_ZERO);
+ if (devi == NULL) {
+ device_delete_child(dev, child);
+ return (0);
+ }
+ device_set_ivars(child, devi);
+ return (child);
+}
+
+static void
+gpiobus_hinted_child(device_t bus, const char *dname, int dunit)
+{
+ struct gpiobus_softc *sc = GPIOBUS_SOFTC(bus);
+ struct gpiobus_ivar *devi;
+ device_t child;
+ int pins;
+
+
+ child = BUS_ADD_CHILD(bus, 0, dname, dunit);
+ devi = GPIOBUS_IVAR(child);
+ resource_int_value(dname, dunit, "pins", &pins);
+ if (gpiobus_parse_pins(sc, child, pins))
+ device_delete_child(bus, child);
+}
+
+static void
+gpiobus_lock_bus(device_t busdev)
+{
+ struct gpiobus_softc *sc;
+
+ sc = device_get_softc(busdev);
+ GPIOBUS_ASSERT_UNLOCKED(sc);
+ GPIOBUS_LOCK(sc);
+}
+
+static void
+gpiobus_unlock_bus(device_t busdev)
+{
+ struct gpiobus_softc *sc;
+
+ sc = device_get_softc(busdev);
+ GPIOBUS_ASSERT_LOCKED(sc);
+ GPIOBUS_UNLOCK(sc);
+}
+
+static void
+gpiobus_acquire_bus(device_t busdev, device_t child)
+{
+ struct gpiobus_softc *sc;
+
+ sc = device_get_softc(busdev);
+ GPIOBUS_ASSERT_LOCKED(sc);
+
+ if (sc->sc_owner)
+ panic("rb_cpldbus: cannot serialize the access to device.");
+ sc->sc_owner = child;
+}
+
+static void
+gpiobus_release_bus(device_t busdev, device_t child)
+{
+ struct gpiobus_softc *sc;
+
+ sc = device_get_softc(busdev);
+ GPIOBUS_ASSERT_LOCKED(sc);
+
+ if (!sc->sc_owner)
+ panic("rb_cpldbus: releasing unowned bus.");
+ if (sc->sc_owner != child)
+ panic("rb_cpldbus: you don't own the bus. game over.");
+
+ sc->sc_owner = NULL;
+}
+
+static int
+gpiobus_pin_setflags(device_t dev, device_t child, uint32_t pin,
+ uint32_t flags)
+{
+ struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
+ struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
+
+ if (pin >= devi->npins)
+ return (EINVAL);
+
+ return GPIO_PIN_SETFLAGS(sc->sc_dev, devi->pins[pin], flags);
+}
+
+static int
+gpiobus_pin_getflags(device_t dev, device_t child, uint32_t pin,
+ uint32_t *flags)
+{
+ struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
+ struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
+
+ if (pin >= devi->npins)
+ return (EINVAL);
+
+ return GPIO_PIN_GETFLAGS(sc->sc_dev, devi->pins[pin], flags);
+}
+
+static int
+gpiobus_pin_getcaps(device_t dev, device_t child, uint32_t pin,
+ uint32_t *caps)
+{
+ struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
+ struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
+
+ if (pin >= devi->npins)
+ return (EINVAL);
+
+ return GPIO_PIN_GETCAPS(sc->sc_dev, devi->pins[pin], caps);
+}
+
+static int
+gpiobus_pin_set(device_t dev, device_t child, uint32_t pin,
+ unsigned int value)
+{
+ struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
+ struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
+
+ if (pin >= devi->npins)
+ return (EINVAL);
+
+ return GPIO_PIN_SET(sc->sc_dev, devi->pins[pin], value);
+}
+
+static int
+gpiobus_pin_get(device_t dev, device_t child, uint32_t pin,
+ unsigned int *value)
+{
+ struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
+ struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
+
+ if (pin >= devi->npins)
+ return (EINVAL);
+
+ return GPIO_PIN_GET(sc->sc_dev, devi->pins[pin], value);
+}
+
+static int
+gpiobus_pin_toggle(device_t dev, device_t child, uint32_t pin)
+{
+ struct gpiobus_softc *sc = GPIOBUS_SOFTC(dev);
+ struct gpiobus_ivar *devi = GPIOBUS_IVAR(child);
+
+ if (pin >= devi->npins)
+ return (EINVAL);
+
+ return GPIO_PIN_TOGGLE(sc->sc_dev, devi->pins[pin]);
+}
+
+static device_method_t gpiobus_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, gpiobus_probe),
+ DEVMETHOD(device_attach, gpiobus_attach),
+ DEVMETHOD(device_detach, gpiobus_detach),
+ DEVMETHOD(device_shutdown, bus_generic_shutdown),
+ DEVMETHOD(device_suspend, gpiobus_suspend),
+ DEVMETHOD(device_resume, gpiobus_resume),
+
+ /* Bus interface */
+ DEVMETHOD(bus_add_child, gpiobus_add_child),
+ DEVMETHOD(bus_print_child, gpiobus_print_child),
+ DEVMETHOD(bus_driver_added, bus_generic_driver_added),
+ DEVMETHOD(bus_child_pnpinfo_str, gpiobus_child_pnpinfo_str),
+ DEVMETHOD(bus_child_location_str, gpiobus_child_location_str),
+ DEVMETHOD(bus_hinted_child, gpiobus_hinted_child),
+
+ /* GPIO protocol */
+ DEVMETHOD(gpiobus_lock_bus, gpiobus_lock_bus),
+ DEVMETHOD(gpiobus_unlock_bus, gpiobus_unlock_bus),
+ DEVMETHOD(gpiobus_acquire_bus, gpiobus_acquire_bus),
+ DEVMETHOD(gpiobus_release_bus, gpiobus_release_bus),
+ DEVMETHOD(gpiobus_pin_getflags, gpiobus_pin_getflags),
+ DEVMETHOD(gpiobus_pin_getcaps, gpiobus_pin_getcaps),
+ DEVMETHOD(gpiobus_pin_setflags, gpiobus_pin_setflags),
+ DEVMETHOD(gpiobus_pin_get, gpiobus_pin_get),
+ DEVMETHOD(gpiobus_pin_set, gpiobus_pin_set),
+ DEVMETHOD(gpiobus_pin_toggle, gpiobus_pin_toggle),
+
+ { 0, 0 }
+};
+
+static driver_t gpiobus_driver = {
+ "gpiobus",
+ gpiobus_methods,
+ sizeof(struct gpiobus_softc)
+};
+
+devclass_t gpiobus_devclass;
+
+DRIVER_MODULE(gpiobus, gpio, gpiobus_driver, gpiobus_devclass, 0, 0);
+MODULE_VERSION(gpiobus, 1);
Added: head/sys/dev/gpio/gpiobus_if.m
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/gpio/gpiobus_if.m Tue Sep 28 03:24:53 2010 (r213237)
@@ -0,0 +1,121 @@
+#-
+# Copyright (c) 2009 Oleksandr Tymoshenko <gonzo at freebsd.org>
+# 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/bus.h>
+#include <sys/gpio.h>
+
+INTERFACE gpiobus;
+
+#
+# Lock the gpio bus
+#
+METHOD void lock_bus {
+ device_t busdev;
+};
+
+#
+# Unlock the gpio bus
+#
+METHOD void unlock_bus {
+ device_t busdev;
+};
+
+#
+# Dedicate the gpio bus control for a child
+#
+METHOD void acquire_bus {
+ device_t busdev;
+ device_t dev;
+};
+
+#
+# Release the bus
+#
+METHOD void release_bus {
+ device_t busdev;
+ device_t dev;
+};
+
+#
+# Set value of pin specifed by pin_num
+#
+METHOD int pin_set {
+ device_t dev;
+ device_t child;
+ uint32_t pin_num;
+ uint32_t pin_value;
+};
+
+#
+# Get value of pin specifed by pin_num
+#
+METHOD int pin_get {
+ device_t dev;
+ device_t child;
+ uint32_t pin_num;
+ uint32_t *pin_value;
+};
+
+#
+# Toggle value of pin specifed by pin_num
+#
+METHOD int pin_toggle {
+ device_t dev;
+ device_t child;
+ uint32_t pin_num;
+};
+
+#
+# Get pin capabilities
+#
+METHOD int pin_getcaps {
+ device_t dev;
+ device_t child;
+ uint32_t pin_num;
+ uint32_t *caps;
+};
+
+#
+# Get pin flags
+#
+METHOD int pin_getflags {
+ device_t dev;
+ device_t child;
+ uint32_t pin_num;
+ uint32_t *flags;
+};
+
+#
+# Set current configuration and capabilities
+#
+METHOD int pin_setflags {
+ device_t dev;
+ device_t child;
+ uint32_t pin_num;
+ uint32_t flags;
+};
Added: head/sys/dev/gpio/gpiobusvar.h
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/gpio/gpiobusvar.h Tue Sep 28 03:24:53 2010 (r213237)
@@ -0,0 +1,56 @@
+/*-
+ * Copyright (c) 2009 Oleksandr Tymoshenko <gonzo at freebsd.org>
+ * 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 ``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 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.
+ *
+ * $FreeBSD$
+ *
+ */
+
+#ifndef __GPIOBUS_H__
+#define __GPIOBUS_H__
+
+#include <sys/param.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+
+#define GPIOBUS_IVAR(d) (struct gpiobus_ivar *) device_get_ivars(d)
+#define GPIOBUS_SOFTC(d) (struct gpiobus_softc *) device_get_softc(d)
+
+struct gpiobus_softc
+{
+ struct mtx sc_mtx; /* bus mutex */
+ device_t sc_busdev; /* bus device */
+ device_t sc_owner; /* bus owner */
+ device_t sc_dev; /* driver device */
+ int sc_npins; /* total pins on bus */
+ int *sc_pins_mapped; /* mark mapped pins */
+};
+
+
+struct gpiobus_ivar
+{
+ uint32_t npins; /* pins total */
+ uint32_t *pins; /* pins map */
+};
+
+#endif /* __GPIOBUS_H__ */
Added: head/sys/dev/gpio/gpioc.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/gpio/gpioc.c Tue Sep 28 03:24:53 2010 (r213237)
@@ -0,0 +1,174 @@
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/types.h>
+
+#include <sys/bus.h>
+#include <sys/conf.h>
+#include <sys/ioccom.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/module.h>
+#include <sys/queue.h>
+#include <machine/bus.h>
+#include <machine/resource.h>
+
+#include <sys/gpio.h>
+#include "gpio_if.h"
+
+#undef GPIOC_DEBUG
+#ifdef GPIOC_DEBUG
+#define dprintf printf
+#else
+#define dprintf(x, arg...)
+#endif
+
+static int gpioc_probe(device_t dev);
+static int gpioc_attach(device_t dev);
+static int gpioc_detach(device_t dev);
+
+static d_ioctl_t gpioc_ioctl;
+
+static struct cdevsw gpioc_cdevsw = {
+ .d_version = D_VERSION,
+ .d_ioctl = gpioc_ioctl,
+ .d_name = "gpioc",
+#if __FreeBSD_version >= 800039
+ .d_flags = D_PSEUDO | D_NEEDMINOR
+#endif
+};
+
+struct gpioc_softc {
+ device_t sc_dev; /* gpiocX dev */
+ device_t sc_pdev; /* gpioX dev */
+ struct cdev *sc_ctl_dev; /* controller device */
+ int sc_unit;
+};
+
+static int
+gpioc_probe(device_t dev)
+{
+ device_set_desc(dev, "GPIO controller");
+ return (0);
+}
+
+static int
+gpioc_attach(device_t dev)
+{
+ struct gpioc_softc *sc = device_get_softc(dev);
+
+ sc->sc_dev = dev;
+ sc->sc_pdev = device_get_parent(dev);
+ sc->sc_unit = device_get_unit(dev);
+ sc->sc_ctl_dev = make_dev(&gpioc_cdevsw, sc->sc_unit,
+ UID_ROOT, GID_WHEEL, 0600, "gpioc%d", sc->sc_unit);
+ if (!sc->sc_ctl_dev) {
+ printf("Failed to create gpioc%d", sc->sc_unit);
+ return (ENXIO);
+ }
+ sc->sc_ctl_dev->si_drv1 = sc;
+
+ return (0);
+}
+
+static int
+gpioc_detach(device_t dev)
+{
+ struct gpioc_softc *sc = device_get_softc(dev);
+ int err;
+
+ if (sc->sc_ctl_dev);
+ destroy_dev(sc->sc_ctl_dev);
+
+ if ((err = bus_generic_detach(dev)) != 0)
+ return (err);
+
+ return (0);
+}
+
+static int
+gpioc_ioctl(struct cdev *cdev, u_long cmd, caddr_t arg, int fflag,
+ struct thread *td)
+{
+ int max_pin, res;
+ struct gpioc_softc *sc = cdev->si_drv1;
+ struct gpio_pin pin;
+ struct gpio_req req;
+
+ switch (cmd) {
+ case GPIOMAXPIN:
+ max_pin = -1;
+ res = GPIO_PIN_MAX(sc->sc_pdev, &max_pin);
+ bcopy(&max_pin, arg, sizeof(max_pin));
+ break;
+ case GPIOGETCONFIG:
+ bcopy(arg, &pin, sizeof(pin));
+ dprintf("get config pin %d\n", pin.gp_pin);
+ res = GPIO_PIN_GETFLAGS(sc->sc_pdev, pin.gp_pin,
+ &pin.gp_flags);
+ /* Fail early */
+ if (res)
+ break;
+ GPIO_PIN_GETCAPS(sc->sc_pdev, pin.gp_pin, &pin.gp_caps);
+ GPIO_PIN_GETNAME(sc->sc_pdev, pin.gp_pin, pin.gp_name);
+ bcopy(&pin, arg, sizeof(pin));
+ break;
+ case GPIOSETCONFIG:
+ bcopy(arg, &pin, sizeof(pin));
+ dprintf("set config pin %d\n", pin.gp_pin);
+ res = GPIO_PIN_SETFLAGS(sc->sc_pdev, pin.gp_pin,
+ pin.gp_flags);
+ break;
+ case GPIOGET:
+ bcopy(arg, &req, sizeof(req));
+ res = GPIO_PIN_GET(sc->sc_pdev, req.gp_pin,
+ &req.gp_value);
+ dprintf("read pin %d -> %d\n",
+ req.gp_pin, req.gp_value);
+ bcopy(&req, arg, sizeof(req));
+ break;
+ case GPIOSET:
+ bcopy(arg, &req, sizeof(req));
+ res = GPIO_PIN_SET(sc->sc_pdev, req.gp_pin,
+ req.gp_value);
+ dprintf("write pin %d -> %d\n",
+ req.gp_pin, req.gp_value);
+ break;
+ case GPIOTOGGLE:
+ bcopy(arg, &req, sizeof(req));
+ dprintf("toggle pin %d\n",
+ req.gp_pin);
+ res = GPIO_PIN_TOGGLE(sc->sc_pdev, req.gp_pin);
+ break;
+ default:
+ return (ENOTTY);
+ break;
+ }
+
+ return (res);
+}
+
+static device_method_t gpioc_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, gpioc_probe),
+ DEVMETHOD(device_attach, gpioc_attach),
+ DEVMETHOD(device_detach, gpioc_detach),
+ DEVMETHOD(device_shutdown, bus_generic_shutdown),
+ DEVMETHOD(device_suspend, bus_generic_suspend),
+ DEVMETHOD(device_resume, bus_generic_resume),
+
+ { 0, 0 }
+};
+
+static driver_t gpioc_driver = {
+ "gpioc",
+ gpioc_methods,
+ sizeof(struct gpioc_softc)
+};
+
+devclass_t gpioc_devclass;
+
+DRIVER_MODULE(gpioc, gpio, gpioc_driver, gpioc_devclass, 0, 0);
+MODULE_VERSION(gpioc, 1);
Added: head/sys/dev/gpio/gpioiic.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/gpio/gpioiic.c Tue Sep 28 03:24:53 2010 (r213237)
@@ -0,0 +1,245 @@
+/*-
+ * Copyright (c) 2009 Oleksandr Tymoshenko <gonzo at freebsd.org>
+ * Copyright (c) 2010 Luiz Otavio O Souza
+ * 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 ``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 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,
*** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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