Author: gonzo
Date: Tue Sep 28 03:31:34 2010
New Revision: 213239
URL: http://svn.freebsd.org/changeset/base/213239
Log:
Add AR71XX GPIO bus driver.
Added:
head/sys/mips/atheros/ar71xx_gpio.c (contents, props changed)
head/sys/mips/atheros/ar71xx_gpiovar.h (contents, props changed)
Modified:
head/sys/mips/atheros/ar71xxreg.h
head/sys/mips/atheros/files.ar71xx
Added: head/sys/mips/atheros/ar71xx_gpio.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/mips/atheros/ar71xx_gpio.c Tue Sep 28 03:31:34 2010
(r213239)
@@ -0,0 +1,446 @@
+/*-
+ * Copyright (c) 2009, Oleksandr Tymoshenko <go...@freebsd.org>
+ * Copyright (c) 2009, 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 unmodified, 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.
+ */
+
+/*
+ * GPIO driver for AR71xx
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/rman.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/gpio.h>
+
+#include <machine/bus.h>
+#include <machine/resource.h>
+#include <mips/atheros/ar71xxreg.h>
+#include <mips/atheros/ar71xx_gpiovar.h>
+
+#include "gpio_if.h"
+
+#define DEFAULT_CAPS (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT)
+
+struct ar71xx_gpio_pin {
+ const char *name;
+ int pin;
+ int flags;
+};
+
+static struct ar71xx_gpio_pin ar71xx_gpio_pins[] = {
+ { "RFled", 2, GPIO_PIN_OUTPUT},
+ { "SW4", 8, GPIO_PIN_INPUT},
+ { NULL, 0, 0},
+};
+
+/*
+ * Helpers
+ */
+static void ar71xx_gpio_function_enable(struct ar71xx_gpio_softc *sc,
+ uint32_t mask);
+static void ar71xx_gpio_function_disable(struct ar71xx_gpio_softc *sc,
+ uint32_t mask);
+static void ar71xx_gpio_pin_configure(struct ar71xx_gpio_softc *sc,
+ struct gpio_pin *pin, uint32_t flags);
+
+/*
+ * Driver stuff
+ */
+static int ar71xx_gpio_probe(device_t dev);
+static int ar71xx_gpio_attach(device_t dev);
+static int ar71xx_gpio_detach(device_t dev);
+static int ar71xx_gpio_filter(void *arg);
+static void ar71xx_gpio_intr(void *arg);
+
+/*
+ * GPIO interface
+ */
+static int ar71xx_gpio_pin_max(device_t dev, int *maxpin);
+static int ar71xx_gpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps);
+static int ar71xx_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t
+ *flags);
+static int ar71xx_gpio_pin_getname(device_t dev, uint32_t pin, char *name);
+static int ar71xx_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t
flags);
+static int ar71xx_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value);
+static int ar71xx_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *val);
+static int ar71xx_gpio_pin_toggle(device_t dev, uint32_t pin);
+
+static void
+ar71xx_gpio_function_enable(struct ar71xx_gpio_softc *sc, uint32_t mask)
+{
+ GPIO_LOCK(sc);
+ GPIO_SET_BITS(sc, AR71XX_GPIO_FUNCTION, mask);
+ GPIO_UNLOCK(sc);
+}
+
+static void
+ar71xx_gpio_function_disable(struct ar71xx_gpio_softc *sc, uint32_t mask)
+{
+ GPIO_LOCK(sc);
+ GPIO_CLEAR_BITS(sc, AR71XX_GPIO_FUNCTION, mask);
+ GPIO_UNLOCK(sc);
+}
+
+static void
+ar71xx_gpio_pin_configure(struct ar71xx_gpio_softc *sc, struct gpio_pin *pin,
+ unsigned int flags)
+{
+ uint32_t mask;
+
+ mask = 1 << pin->gp_pin;
+ GPIO_LOCK(sc);
+
+ /*
+ * Manage input/output
+ */
+ if (flags & (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)) {
+ pin->gp_flags &= ~(GPIO_PIN_INPUT|GPIO_PIN_OUTPUT);
+ if (flags & GPIO_PIN_OUTPUT) {
+ pin->gp_flags |= GPIO_PIN_OUTPUT;
+ GPIO_SET_BITS(sc, AR71XX_GPIO_OE, mask);
+ }
+ else {
+ pin->gp_flags |= GPIO_PIN_INPUT;
+ GPIO_CLEAR_BITS(sc, AR71XX_GPIO_OE, mask);
+ }
+ }
+
+ GPIO_UNLOCK(sc);
+}
+
+static int
+ar71xx_gpio_pin_max(device_t dev, int *maxpin)
+{
+
+ *maxpin = AR71XX_GPIO_PINS - 1;
+ return (0);
+}
+
+static int
+ar71xx_gpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps)
+{
+ struct ar71xx_gpio_softc *sc = device_get_softc(dev);
+ int i;
+
+ for (i = 0; i < sc->gpio_npins; i++) {
+ if (sc->gpio_pins[i].gp_pin == pin)
+ break;
+ }
+
+ if (i >= sc->gpio_npins)
+ return (EINVAL);
+
+ GPIO_LOCK(sc);
+ *caps = sc->gpio_pins[i].gp_caps;
+ GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+ar71xx_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t *flags)
+{
+ struct ar71xx_gpio_softc *sc = device_get_softc(dev);
+ int i;
+
+ for (i = 0; i < sc->gpio_npins; i++) {
+ if (sc->gpio_pins[i].gp_pin == pin)
+ break;
+ }
+
+ if (i >= sc->gpio_npins)
+ return (EINVAL);
+
+ GPIO_LOCK(sc);
+ *flags = sc->gpio_pins[i].gp_flags;
+ GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+ar71xx_gpio_pin_getname(device_t dev, uint32_t pin, char *name)
+{
+ struct ar71xx_gpio_softc *sc = device_get_softc(dev);
+ int i;
+
+ for (i = 0; i < sc->gpio_npins; i++) {
+ if (sc->gpio_pins[i].gp_pin == pin)
+ break;
+ }
+
+ if (i >= sc->gpio_npins)
+ return (EINVAL);
+
+ GPIO_LOCK(sc);
+ memcpy(name, sc->gpio_pins[i].gp_name, GPIOMAXNAME);
+ GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+ar71xx_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
+{
+ int i;
+ struct ar71xx_gpio_softc *sc = device_get_softc(dev);
+
+ for (i = 0; i < sc->gpio_npins; i++) {
+ if (sc->gpio_pins[i].gp_pin == pin)
+ break;
+ }
+
+ if (i >= sc->gpio_npins)
+ return (EINVAL);
+
+ /* Filter out unwanted flags */
+ if ((flags &= sc->gpio_pins[i].gp_caps) != flags)
+ return (EINVAL);
+
+ /* Can't mix input/output together */
+ if ((flags & (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)) ==
+ (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT))
+ return (EINVAL);
+
+ ar71xx_gpio_pin_configure(sc, &sc->gpio_pins[i], flags);
+ return (0);
+}
+
+static int
+ar71xx_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value)
+{
+ struct ar71xx_gpio_softc *sc = device_get_softc(dev);
+ int i;
+
+ for (i = 0; i < sc->gpio_npins; i++) {
+ if (sc->gpio_pins[i].gp_pin == pin)
+ break;
+ }
+
+ if (i >= sc->gpio_npins)
+ return (EINVAL);
+
+ GPIO_LOCK(sc);
+ if (value)
+ GPIO_WRITE(sc, AR71XX_GPIO_SET, (1 << pin));
+ else
+ GPIO_WRITE(sc, AR71XX_GPIO_CLEAR, (1 << pin));
+ GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+ar71xx_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *val)
+{
+ struct ar71xx_gpio_softc *sc = device_get_softc(dev);
+ int i;
+
+ for (i = 0; i < sc->gpio_npins; i++) {
+ if (sc->gpio_pins[i].gp_pin == pin)
+ break;
+ }
+
+ if (i >= sc->gpio_npins)
+ return (EINVAL);
+
+ GPIO_LOCK(sc);
+ *val = (GPIO_READ(sc, AR71XX_GPIO_IN) & (1 << pin)) ? 1 : 0;
+ GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+ar71xx_gpio_pin_toggle(device_t dev, uint32_t pin)
+{
+ int res, i;
+ struct ar71xx_gpio_softc *sc = device_get_softc(dev);
+
+ for (i = 0; i < sc->gpio_npins; i++) {
+ if (sc->gpio_pins[i].gp_pin == pin)
+ break;
+ }
+
+ if (i >= sc->gpio_npins)
+ return (EINVAL);
+
+ GPIO_LOCK(sc);
+ res = (GPIO_READ(sc, AR71XX_GPIO_IN) & (1 << pin)) ? 1 : 0;
+ if (res)
+ GPIO_WRITE(sc, AR71XX_GPIO_CLEAR, (1 << pin));
+ else
+ GPIO_WRITE(sc, AR71XX_GPIO_SET, (1 << pin));
+ GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+ar71xx_gpio_filter(void *arg)
+{
+
+ /* TODO: something useful */
+ return (FILTER_STRAY);
+}
+
+
+
+static void
+ar71xx_gpio_intr(void *arg)
+{
+ struct ar71xx_gpio_softc *sc = arg;
+ GPIO_LOCK(sc);
+ /* TODO: something useful */
+ GPIO_UNLOCK(sc);
+}
+
+static int
+ar71xx_gpio_probe(device_t dev)
+{
+
+ device_set_desc(dev, "Atheros AR71XX GPIO driver");
+ return (0);
+}
+
+static int
+ar71xx_gpio_attach(device_t dev)
+{
+ struct ar71xx_gpio_softc *sc = device_get_softc(dev);
+ int error = 0;
+ struct ar71xx_gpio_pin *pinp;
+ int i;
+
+ KASSERT((device_get_unit(dev) == 0),
+ ("ar71xx_gpio: Only one gpio module supported"));
+
+ mtx_init(&sc->gpio_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
+ MTX_DEF);
+
+ /* Map control/status registers. */
+ sc->gpio_mem_rid = 0;
+ sc->gpio_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
+ &sc->gpio_mem_rid, RF_ACTIVE);
+
+ if (sc->gpio_mem_res == NULL) {
+ device_printf(dev, "couldn't map memory\n");
+ error = ENXIO;
+ ar71xx_gpio_detach(dev);
+ return(error);
+ }
+
+ if ((sc->gpio_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
+ &sc->gpio_irq_rid, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
+ device_printf(dev, "unable to allocate IRQ resource\n");
+ return (ENXIO);
+ }
+
+ if ((bus_setup_intr(dev, sc->gpio_irq_res, INTR_TYPE_MISC,
+ ar71xx_gpio_filter, ar71xx_gpio_intr, sc, &sc->gpio_ih))) {
+ device_printf(dev,
+ "WARNING: unable to register interrupt handler\n");
+ return (ENXIO);
+ }
+
+ sc->dev = dev;
+ ar71xx_gpio_function_enable(sc, GPIO_SPI_CS1_EN);
+ ar71xx_gpio_function_enable(sc, GPIO_SPI_CS2_EN);
+ /* Configure all pins as input */
+ /* disable interrupts for all pins */
+ GPIO_WRITE(sc, AR71XX_GPIO_INT_MASK, 0);
+ pinp = ar71xx_gpio_pins;
+ i = 0;
+ while (pinp->name) {
+ strncpy(sc->gpio_pins[i].gp_name, pinp->name, GPIOMAXNAME);
+ sc->gpio_pins[i].gp_pin = pinp->pin;
+ sc->gpio_pins[i].gp_caps = DEFAULT_CAPS;
+ sc->gpio_pins[i].gp_flags = 0;
+ ar71xx_gpio_pin_configure(sc, &sc->gpio_pins[i], pinp->flags);
+ pinp++;
+ i++;
+ }
+
+ sc->gpio_npins = i;
+
+ 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
+ar71xx_gpio_detach(device_t dev)
+{
+ struct ar71xx_gpio_softc *sc = device_get_softc(dev);
+
+ KASSERT(mtx_initialized(&sc->gpio_mtx), ("gpio mutex not initialized"));
+
+ ar71xx_gpio_function_disable(sc, GPIO_SPI_CS1_EN);
+ ar71xx_gpio_function_disable(sc, GPIO_SPI_CS2_EN);
+ 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);
+}
+
+static device_method_t ar71xx_gpio_methods[] = {
+ DEVMETHOD(device_probe, ar71xx_gpio_probe),
+ DEVMETHOD(device_attach, ar71xx_gpio_attach),
+ DEVMETHOD(device_detach, ar71xx_gpio_detach),
+
+ /* GPIO protocol */
+ DEVMETHOD(gpio_pin_max, ar71xx_gpio_pin_max),
+ DEVMETHOD(gpio_pin_getname, ar71xx_gpio_pin_getname),
+ DEVMETHOD(gpio_pin_getflags, ar71xx_gpio_pin_getflags),
+ DEVMETHOD(gpio_pin_getcaps, ar71xx_gpio_pin_getcaps),
+ DEVMETHOD(gpio_pin_setflags, ar71xx_gpio_pin_setflags),
+ DEVMETHOD(gpio_pin_get, ar71xx_gpio_pin_get),
+ DEVMETHOD(gpio_pin_set, ar71xx_gpio_pin_set),
+ DEVMETHOD(gpio_pin_toggle, ar71xx_gpio_pin_toggle),
+ {0, 0},
+};
+
+static driver_t ar71xx_gpio_driver = {
+ "gpio",
+ ar71xx_gpio_methods,
+ sizeof(struct ar71xx_gpio_softc),
+};
+static devclass_t ar71xx_gpio_devclass;
+
+DRIVER_MODULE(ar71xx_gpio, apb, ar71xx_gpio_driver, ar71xx_gpio_devclass, 0,
0);
Added: head/sys/mips/atheros/ar71xx_gpiovar.h
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/mips/atheros/ar71xx_gpiovar.h Tue Sep 28 03:31:34 2010
(r213239)
@@ -0,0 +1,68 @@
+/*-
+ * Copyright (c) 2009, Oleksandr Tymoshenko <go...@freebsd.org>
+ * Copyright (c) 2009, 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 unmodified, 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.
+ *
+ * $FreeBSD$
+ *
+ */
+
+#ifndef __AR71XX_GPIOVAR_H__
+#define __AR71XX_GPIOVAR_H__
+
+#define GPIO_LOCK(_sc) mtx_lock(&(_sc)->gpio_mtx)
+#define GPIO_UNLOCK(_sc) mtx_unlock(&(_sc)->gpio_mtx)
+#define GPIO_LOCK_ASSERT(_sc) mtx_assert(&(_sc)->gpio_mtx, MA_OWNED)
+
+/*
+ * register space access macros
+ */
+#define GPIO_WRITE(sc, reg, val) do { \
+ bus_write_4(sc->gpio_mem_res, (reg), (val)); \
+ } while (0)
+
+#define GPIO_READ(sc, reg) bus_read_4(sc->gpio_mem_res, (reg))
+
+#define GPIO_SET_BITS(sc, reg, bits) \
+ GPIO_WRITE(sc, reg, GPIO_READ(sc, (reg)) | (bits))
+
+#define GPIO_CLEAR_BITS(sc, reg, bits) \
+ GPIO_WRITE(sc, reg, GPIO_READ(sc, (reg)) & ~(bits))
+
+#define AR71XX_GPIO_PINS 12
+
+struct ar71xx_gpio_softc {
+ device_t dev;
+ struct mtx gpio_mtx;
+ struct resource *gpio_mem_res;
+ int gpio_mem_rid;
+ struct resource *gpio_irq_res;
+ int gpio_irq_rid;
+ void *gpio_ih;
+ int gpio_npins;
+ struct gpio_pin gpio_pins[AR71XX_GPIO_PINS];
+};
+
+#endif /* __AR71XX_GPIOVAR_H__ */
Modified: head/sys/mips/atheros/ar71xxreg.h
==============================================================================
--- head/sys/mips/atheros/ar71xxreg.h Tue Sep 28 03:28:20 2010
(r213238)
+++ head/sys/mips/atheros/ar71xxreg.h Tue Sep 28 03:31:34 2010
(r213239)
@@ -160,6 +160,21 @@
#define GPIO_FUNC_USB_OC_EN (1 << 4)
#define GPIO_FUNC_USB_CLK_EN (0)
+#define AR71XX_GPIO_BASE 0x18040000
+#define AR71XX_GPIO_OE 0x00
+#define AR71XX_GPIO_IN 0x04
+#define AR71XX_GPIO_OUT 0x08
+#define AR71XX_GPIO_SET 0x0c
+#define AR71XX_GPIO_CLEAR 0x10
+#define AR71XX_GPIO_INT 0x14
+#define AR71XX_GPIO_INT_TYPE 0x18
+#define AR71XX_GPIO_INT_POLARITY 0x1c
+#define AR71XX_GPIO_INT_PENDING 0x20
+#define AR71XX_GPIO_INT_MASK 0x24
+#define AR71XX_GPIO_FUNCTION 0x28
+#define GPIO_SPI_CS2_EN (1 << 13)
+#define GPIO_SPI_CS1_EN (1 << 12)
+
#define AR71XX_BASE_FREQ 40000000
#define AR71XX_PLL_CPU_BASE 0x18050000
#define AR71XX_PLL_CPU_CONFIG 0x18050000
Modified: head/sys/mips/atheros/files.ar71xx
==============================================================================
--- head/sys/mips/atheros/files.ar71xx Tue Sep 28 03:28:20 2010
(r213238)
+++ head/sys/mips/atheros/files.ar71xx Tue Sep 28 03:31:34 2010
(r213239)
@@ -1,6 +1,7 @@
# $FreeBSD$
mips/atheros/apb.c standard
+mips/atheros/ar71xx_gpio.c optional gpio
mips/atheros/ar71xx_machdep.c standard
mips/atheros/ar71xx_ehci.c optional ehci
mips/atheros/ar71xx_ohci.c optional ohci
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