Author: ganbold (doc committer)
Date: Tue Feb 5 02:25:13 2013
New Revision: 246342
URL: http://svnweb.freebsd.org/changeset/base/246342
Log:
Add gpio driver and update dts and kernel config accordingly.
Approved by: gonzo@
Added:
head/sys/arm/allwinner/a10_gpio.c (contents, props changed)
Modified:
head/sys/arm/allwinner/files.a10
head/sys/arm/conf/CUBIEBOARD
head/sys/boot/fdt/dts/cubieboard.dts
Added: head/sys/arm/allwinner/a10_gpio.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/allwinner/a10_gpio.c Tue Feb 5 02:25:13 2013
(r246342)
@@ -0,0 +1,521 @@
+/*-
+ * Copyright (c) 2013 Ganbold Tsagaankhuu <ganb...@gmail.com>
+ * Copyright (c) 2012 Oleksandr Tymoshenko <go...@freebsd.org>
+ * Copyright (c) 2012 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 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.
+ *
+ */
+#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/cpu.h>
+#include <machine/cpufunc.h>
+#include <machine/resource.h>
+#include <machine/fdt.h>
+#include <machine/frame.h>
+#include <machine/intr.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include "gpio_if.h"
+
+/*
+ * A10 have 9 banks of gpio.
+ * 32 pins per bank:
+ * PA0 - PA17 | PB0 - PB23 | PC0 - PC24
+ * PD0 - PD27 | PE0 - PE31 | PF0 - PF5
+ * PG0 - PG9 | PH0 - PH27 | PI0 - PI12
+ */
+
+#define A10_GPIO_PINS 288
+#define A10_GPIO_DEFAULT_CAPS (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT |
\
+ GPIO_PIN_PULLUP | GPIO_PIN_PULLDOWN)
+
+struct a10_gpio_softc {
+ device_t sc_dev;
+ struct mtx sc_mtx;
+ struct resource * sc_mem_res;
+ struct resource * sc_irq_res;
+ bus_space_tag_t sc_bst;
+ bus_space_handle_t sc_bsh;
+ void * sc_intrhand;
+ int sc_gpio_npins;
+ struct gpio_pin sc_gpio_pins[A10_GPIO_PINS];
+};
+
+enum a10_gpio_fsel {
+ A10_GPIO_INPUT,
+ A10_GPIO_OUTPUT,
+};
+
+enum a10_gpio_pud {
+ A10_GPIO_NONE,
+ A10_GPIO_PULLDOWN,
+ A10_GPIO_PULLUP,
+};
+
+#define A10_GPIO_LOCK(_sc) mtx_lock(&_sc->sc_mtx)
+#define A10_GPIO_UNLOCK(_sc) mtx_unlock(&_sc->sc_mtx)
+#define A10_GPIO_LOCK_ASSERT(_sc) mtx_assert(&_sc->sc_mtx,
MA_OWNED)
+
+#define A10_GPIO_GP_CFG(_bank, _pin) 0x00 + ((_bank) * 0x24) +
((_pin)<<2)
+#define A10_GPIO_GP_DAT(_bank) 0x10 + ((_bank) * 0x24)
+#define A10_GPIO_GP_DRV(_bank, _pin) 0x14 + ((_bank) * 0x24) +
((_pin)<<2)
+#define A10_GPIO_GP_PUL(_bank, _pin) 0x1c + ((_bank) * 0x24) +
((_pin)<<2)
+
+#define A10_GPIO_GP_INT_CFG0 0x200
+#define A10_GPIO_GP_INT_CFG1 0x204
+#define A10_GPIO_GP_INT_CFG2 0x208
+#define A10_GPIO_GP_INT_CFG3 0x20c
+
+#define A10_GPIO_GP_INT_CTL 0x210
+#define A10_GPIO_GP_INT_STA 0x214
+#define A10_GPIO_GP_INT_DEB 0x218
+
+#define A10_GPIO_WRITE(_sc, _off, _val) \
+ bus_space_write_4(_sc->sc_bst, _sc->sc_bsh, _off, _val)
+#define A10_GPIO_READ(_sc, _off) \
+ bus_space_read_4(_sc->sc_bst, _sc->sc_bsh, _off)
+
+static uint32_t
+a10_gpio_get_function(struct a10_gpio_softc *sc, uint32_t pin)
+{
+ uint32_t bank, func, offset;
+
+ bank = pin / 32;
+ pin = pin - 32 * bank;
+ func = pin >> 3;
+ offset = ((pin & 0x07) << 2);
+
+ A10_GPIO_LOCK(sc);
+ func = (A10_GPIO_READ(sc, A10_GPIO_GP_CFG(bank, func)) >> offset) & 7;
+ A10_GPIO_UNLOCK(sc);
+
+ return (func);
+}
+
+static uint32_t
+a10_gpio_func_flag(uint32_t nfunc)
+{
+
+ switch (nfunc) {
+ case A10_GPIO_INPUT:
+ return (GPIO_PIN_INPUT);
+ case A10_GPIO_OUTPUT:
+ return (GPIO_PIN_OUTPUT);
+ }
+ return (0);
+}
+
+static void
+a10_gpio_set_function(struct a10_gpio_softc *sc, uint32_t pin, uint32_t f)
+{
+ uint32_t bank, func, data, offset;
+
+ /* Must be called with lock held. */
+ A10_GPIO_LOCK_ASSERT(sc);
+
+ bank = pin / 32;
+ pin = pin - 32 * bank;
+ func = pin >> 3;
+ offset = ((pin & 0x07) << 2);
+
+ data = A10_GPIO_READ(sc, A10_GPIO_GP_CFG(bank, func));
+ data &= ~(7 << offset);
+ data |= (f << offset);
+ A10_GPIO_WRITE(sc, A10_GPIO_GP_CFG(bank, func), data);
+}
+
+static void
+a10_gpio_set_pud(struct a10_gpio_softc *sc, uint32_t pin, uint32_t state)
+{
+ uint32_t bank, offset, pull, val;
+
+ /* Must be called with lock held. */
+ A10_GPIO_LOCK_ASSERT(sc);
+
+ bank = pin / 32;
+ pin = pin - 32 * bank;
+ pull = pin >> 4;
+ offset = ((pin & 0x0f) << 1);
+
+ val = A10_GPIO_READ(sc, A10_GPIO_GP_PUL(bank, pull));
+ val &= ~(0x03 << offset);
+ val |= (state << offset);
+ A10_GPIO_WRITE(sc, A10_GPIO_GP_PUL(bank, pull), val);
+}
+
+static void
+a10_gpio_pin_configure(struct a10_gpio_softc *sc, struct gpio_pin *pin,
+ unsigned int flags)
+{
+
+ A10_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;
+ a10_gpio_set_function(sc, pin->gp_pin,
+ A10_GPIO_OUTPUT);
+ } else {
+ pin->gp_flags |= GPIO_PIN_INPUT;
+ a10_gpio_set_function(sc, pin->gp_pin,
+ A10_GPIO_INPUT);
+ }
+ }
+
+ /* Manage Pull-up/pull-down. */
+ pin->gp_flags &= ~(GPIO_PIN_PULLUP|GPIO_PIN_PULLDOWN);
+ if (flags & (GPIO_PIN_PULLUP|GPIO_PIN_PULLDOWN)) {
+ if (flags & GPIO_PIN_PULLUP) {
+ pin->gp_flags |= GPIO_PIN_PULLUP;
+ a10_gpio_set_pud(sc, pin->gp_pin, A10_GPIO_PULLUP);
+ } else {
+ pin->gp_flags |= GPIO_PIN_PULLDOWN;
+ a10_gpio_set_pud(sc, pin->gp_pin, A10_GPIO_PULLDOWN);
+ }
+ } else
+ a10_gpio_set_pud(sc, pin->gp_pin, A10_GPIO_NONE);
+
+ A10_GPIO_UNLOCK(sc);
+}
+
+static int
+a10_gpio_pin_max(device_t dev, int *maxpin)
+{
+
+ *maxpin = A10_GPIO_PINS - 1;
+ return (0);
+}
+
+static int
+a10_gpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps)
+{
+ struct a10_gpio_softc *sc = device_get_softc(dev);
+ int i;
+
+ for (i = 0; i < sc->sc_gpio_npins; i++) {
+ if (sc->sc_gpio_pins[i].gp_pin == pin)
+ break;
+ }
+
+ if (i >= sc->sc_gpio_npins)
+ return (EINVAL);
+
+ A10_GPIO_LOCK(sc);
+ *caps = sc->sc_gpio_pins[i].gp_caps;
+ A10_GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+a10_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t *flags)
+{
+ struct a10_gpio_softc *sc = device_get_softc(dev);
+ int i;
+
+ for (i = 0; i < sc->sc_gpio_npins; i++) {
+ if (sc->sc_gpio_pins[i].gp_pin == pin)
+ break;
+ }
+
+ if (i >= sc->sc_gpio_npins)
+ return (EINVAL);
+
+ A10_GPIO_LOCK(sc);
+ *flags = sc->sc_gpio_pins[i].gp_flags;
+ A10_GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+a10_gpio_pin_getname(device_t dev, uint32_t pin, char *name)
+{
+ struct a10_gpio_softc *sc = device_get_softc(dev);
+ int i;
+
+ for (i = 0; i < sc->sc_gpio_npins; i++) {
+ if (sc->sc_gpio_pins[i].gp_pin == pin)
+ break;
+ }
+
+ if (i >= sc->sc_gpio_npins)
+ return (EINVAL);
+
+ A10_GPIO_LOCK(sc);
+ memcpy(name, sc->sc_gpio_pins[i].gp_name, GPIOMAXNAME);
+ A10_GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+a10_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
+{
+ struct a10_gpio_softc *sc = device_get_softc(dev);
+ int i;
+
+ for (i = 0; i < sc->sc_gpio_npins; i++) {
+ if (sc->sc_gpio_pins[i].gp_pin == pin)
+ break;
+ }
+
+ if (i >= sc->sc_gpio_npins)
+ return (EINVAL);
+
+ /* Filter out unwanted flags. */
+ if ((flags &= sc->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);
+
+ /* Can't mix pull-up/pull-down together. */
+ if ((flags & (GPIO_PIN_PULLUP|GPIO_PIN_PULLDOWN)) ==
+ (GPIO_PIN_PULLUP|GPIO_PIN_PULLDOWN))
+ return (EINVAL);
+
+ a10_gpio_pin_configure(sc, &sc->sc_gpio_pins[i], flags);
+
+ return (0);
+}
+
+static int
+a10_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value)
+{
+ struct a10_gpio_softc *sc = device_get_softc(dev);
+ uint32_t bank, offset, data;
+ int i;
+
+ for (i = 0; i < sc->sc_gpio_npins; i++) {
+ if (sc->sc_gpio_pins[i].gp_pin == pin)
+ break;
+ }
+
+ if (i >= sc->sc_gpio_npins)
+ return (EINVAL);
+
+ bank = pin / 32;
+ pin = pin - 32 * bank;
+ offset = pin & 0x1f;
+
+ A10_GPIO_LOCK(sc);
+ data = A10_GPIO_READ(sc, A10_GPIO_GP_DAT(bank));
+ if (value)
+ data |= (1 << offset);
+ else
+ data &= ~(1 << offset);
+ A10_GPIO_WRITE(sc, A10_GPIO_GP_DAT(bank), data);
+ A10_GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+a10_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *val)
+{
+ struct a10_gpio_softc *sc = device_get_softc(dev);
+ uint32_t bank, offset, reg_data;
+ int i;
+
+ for (i = 0; i < sc->sc_gpio_npins; i++) {
+ if (sc->sc_gpio_pins[i].gp_pin == pin)
+ break;
+ }
+
+ if (i >= sc->sc_gpio_npins)
+ return (EINVAL);
+
+ bank = pin / 32;
+ pin = pin - 32 * bank;
+ offset = pin & 0x1f;
+
+ A10_GPIO_LOCK(sc);
+ reg_data = A10_GPIO_READ(sc, A10_GPIO_GP_DAT(bank));
+ A10_GPIO_UNLOCK(sc);
+ *val = (reg_data & (1 << offset)) ? 1 : 0;
+
+ return (0);
+}
+
+static int
+a10_gpio_pin_toggle(device_t dev, uint32_t pin)
+{
+ struct a10_gpio_softc *sc = device_get_softc(dev);
+ uint32_t bank, data, offset;
+ int i;
+
+ for (i = 0; i < sc->sc_gpio_npins; i++) {
+ if (sc->sc_gpio_pins[i].gp_pin == pin)
+ break;
+ }
+
+ if (i >= sc->sc_gpio_npins)
+ return (EINVAL);
+
+ bank = pin / 32;
+ pin = pin - 32 * bank;
+ offset = pin & 0x1f;
+
+ A10_GPIO_LOCK(sc);
+ data = A10_GPIO_READ(sc, A10_GPIO_GP_DAT(bank));
+ if (data & (1 << offset))
+ data &= ~(1 << offset);
+ else
+ data |= (1 << offset);
+ A10_GPIO_WRITE(sc, A10_GPIO_GP_DAT(bank), data);
+ A10_GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+a10_gpio_probe(device_t dev)
+{
+ if (!ofw_bus_is_compatible(dev, "allwinner,sun4i-gpio"))
+ return (ENXIO);
+
+ device_set_desc(dev, "Allwinner GPIO controller");
+ return (BUS_PROBE_DEFAULT);
+}
+
+static int
+a10_gpio_attach(device_t dev)
+{
+ struct a10_gpio_softc *sc = device_get_softc(dev);
+ uint32_t func;
+ int i, rid;
+ phandle_t gpio;
+
+ sc->sc_dev = dev;
+
+ mtx_init(&sc->sc_mtx, "a10 gpio", "gpio", MTX_DEF);
+
+ rid = 0;
+ sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
+ RF_ACTIVE);
+ if (!sc->sc_mem_res) {
+ device_printf(dev, "cannot allocate memory window\n");
+ return (ENXIO);
+ }
+
+ sc->sc_bst = rman_get_bustag(sc->sc_mem_res);
+ sc->sc_bsh = rman_get_bushandle(sc->sc_mem_res);
+
+ rid = 0;
+ sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
+ RF_ACTIVE);
+ if (!sc->sc_irq_res) {
+ bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);
+ device_printf(dev, "cannot allocate interrupt\n");
+ return (ENXIO);
+ }
+
+ /* Find our node. */
+ gpio = ofw_bus_get_node(sc->sc_dev);
+
+ if (!OF_hasprop(gpio, "gpio-controller"))
+ /* Node is not a GPIO controller. */
+ goto fail;
+
+ /* Initialize the software controlled pins. */
+ for (i = 0; i < A10_GPIO_PINS; i++) {
+ snprintf(sc->sc_gpio_pins[i].gp_name, GPIOMAXNAME,
+ "pin %d", i);
+ func = a10_gpio_get_function(sc, i);
+ sc->sc_gpio_pins[i].gp_pin = i;
+ sc->sc_gpio_pins[i].gp_caps = A10_GPIO_DEFAULT_CAPS;
+ sc->sc_gpio_pins[i].gp_flags = a10_gpio_func_flag(func);
+ }
+ sc->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));
+
+fail:
+ if (sc->sc_irq_res)
+ bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq_res);
+ if (sc->sc_mem_res)
+ bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);
+ return (ENXIO);
+}
+
+static int
+a10_gpio_detach(device_t dev)
+{
+
+ return (EBUSY);
+}
+
+static device_method_t a10_gpio_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, a10_gpio_probe),
+ DEVMETHOD(device_attach, a10_gpio_attach),
+ DEVMETHOD(device_detach, a10_gpio_detach),
+
+ /* GPIO protocol */
+ DEVMETHOD(gpio_pin_max, a10_gpio_pin_max),
+ DEVMETHOD(gpio_pin_getname, a10_gpio_pin_getname),
+ DEVMETHOD(gpio_pin_getflags, a10_gpio_pin_getflags),
+ DEVMETHOD(gpio_pin_getcaps, a10_gpio_pin_getcaps),
+ DEVMETHOD(gpio_pin_setflags, a10_gpio_pin_setflags),
+ DEVMETHOD(gpio_pin_get, a10_gpio_pin_get),
+ DEVMETHOD(gpio_pin_set, a10_gpio_pin_set),
+ DEVMETHOD(gpio_pin_toggle, a10_gpio_pin_toggle),
+
+ DEVMETHOD_END
+};
+
+static devclass_t a10_gpio_devclass;
+
+static driver_t a10_gpio_driver = {
+ "gpio",
+ a10_gpio_methods,
+ sizeof(struct a10_gpio_softc),
+};
+
+DRIVER_MODULE(a10_gpio, simplebus, a10_gpio_driver, a10_gpio_devclass, 0, 0);
Modified: head/sys/arm/allwinner/files.a10
==============================================================================
--- head/sys/arm/allwinner/files.a10 Tue Feb 5 00:37:45 2013
(r246341)
+++ head/sys/arm/allwinner/files.a10 Tue Feb 5 02:25:13 2013
(r246342)
@@ -10,6 +10,7 @@ arm/arm/cpufunc_asm_armv7.S standard
arm/arm/irq_dispatch.S standard
arm/allwinner/a10_clk.c standard
+arm/allwinner/a10_gpio.c optional gpio
arm/allwinner/a10_ehci.c optional ehci
arm/allwinner/timer.c standard
arm/allwinner/aintc.c standard
Modified: head/sys/arm/conf/CUBIEBOARD
==============================================================================
--- head/sys/arm/conf/CUBIEBOARD Tue Feb 5 00:37:45 2013
(r246341)
+++ head/sys/arm/conf/CUBIEBOARD Tue Feb 5 02:25:13 2013
(r246342)
@@ -99,7 +99,7 @@ device random # Entropy device
#device iic
# GPIO
-#device gpio
+device gpio
device scbus # SCSI bus (required for SCSI)
device da # Direct Access (disks)
Modified: head/sys/boot/fdt/dts/cubieboard.dts
==============================================================================
--- head/sys/boot/fdt/dts/cubieboard.dts Tue Feb 5 00:37:45 2013
(r246341)
+++ head/sys/boot/fdt/dts/cubieboard.dts Tue Feb 5 02:25:13 2013
(r246342)
@@ -76,6 +76,15 @@
clock-frequency = < 24000000 >;
};
+ GPIO: gpio@01c20800 {
+ #gpio-cells = <3>;
+ compatible = "allwinner,sun4i-gpio";
+ gpio-controller;
+ reg =< 0x01c20800 0x400 >;
+ interrupts = < 28 >;
+ interrupt-parent = <&AINTC>;
+ };
+
usb1: usb@01c1c000 {
compatible = "allwinner,usb-ehci", "usb-ehci";
reg = <0x01c1c000 0x1000>;
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