Author: mw
Date: Mon May 25 14:55:37 2020
New Revision: 361460
URL: https://svnweb.freebsd.org/changeset/base/361460
Log:
Add GPIO support for QorIQ boards.
This patch adds a GPIO controller support targeted for NXP LS1046A
SoC. The driver implements the following features:
* setting direction of each pin (IN or OUT)
* setting the mode of output pins (PUSHPULL or OPENDRAIN)
* setting the state of each output pin (1 or 0)
* reading the state of each input pin (1 or 0)
Submitted by: Kamil Koczurek <k...@semihalf.com>
Dawid Gorecki <d...@semihalf.com>
Reviewed by: manu
Obtained from: Semihalf
Sponsored by: Alstom Group
Differential Revision: https://reviews.freebsd.org/D24353
Added:
head/sys/arm64/qoriq/ls1046_gpio.c (contents, props changed)
Modified:
head/sys/arm64/conf/GENERIC
head/sys/conf/files.arm64
Modified: head/sys/arm64/conf/GENERIC
==============================================================================
--- head/sys/arm64/conf/GENERIC Mon May 25 14:45:18 2020 (r361459)
+++ head/sys/arm64/conf/GENERIC Mon May 25 14:55:37 2020 (r361460)
@@ -248,6 +248,7 @@ device gpio
device gpioled
device fdt_pinctrl
device gpioregulator
+device ls1046_gpio # LS1046A GPIO controller
device mv_gpio # Marvell GPIO controller
device mvebu_pinctrl # Marvell Pinmux Controller
device rk_gpio # RockChip GPIO Controller
Added: head/sys/arm64/qoriq/ls1046_gpio.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm64/qoriq/ls1046_gpio.c Mon May 25 14:55:37 2020
(r361460)
@@ -0,0 +1,586 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2020 Alstom Group.
+ * Copyright (c) 2020 Semihalf.
+ *
+ * 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/bus.h>
+#include <sys/endian.h>
+#include <sys/gpio.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/mutex.h>
+
+#include <dev/gpio/gpiobusvar.h>
+#include <dev/ofw/ofw_bus.h>
+#include <machine/bus.h>
+
+#include "gpio_if.h"
+
+/* constants */
+enum {
+ DIRECTION = 0x0,
+ OPEN_DRAIN = 0x4,
+ DATA = 0x8,
+ INT_EV = 0xC,
+ INT_MASK = 0x10,
+ INT_CTRL = 0x14
+};
+
+#define PIN_COUNT 32
+#define DEFAULT_CAPS \
+ (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT | \
+ GPIO_PIN_OPENDRAIN | GPIO_PIN_PUSHPULL)
+#define GPIO(n) (1 << (31 - (n)))
+
+struct gpio_res {
+ int mem_rid;
+ struct resource *mem_res;
+};
+
+/* software context */
+struct gpio_softc {
+ device_t dev;
+ device_t busdev;
+ struct gpio_res res;
+ struct gpio_pin setup[PIN_COUNT];
+ struct mtx mutex;
+};
+
+#define QORIQ_GPIO_LOCK(_sc) mtx_lock_spin(&(_sc)->mutex)
+#define QORIQ_GPIO_UNLOCK(_sc) mtx_unlock_spin(&(_sc)->mutex)
+#define QORIQ_GPIO_ASSERT_LOCKED(_sc) mtx_assert(&(_sc)->mutex,
MA_OWNED)
+
+/* prototypes */
+/* helpers */
+static int qoriq_make_gpio_res(device_t, struct gpio_res*);
+static uint32_t qoriq_gpio_reg_read(device_t, uint32_t);
+static void qoriq_gpio_reg_write(device_t, uint32_t, uint32_t);
+static void qoriq_gpio_reg_set(device_t, uint32_t, uint32_t);
+static void qoriq_gpio_reg_clear(device_t, uint32_t, uint32_t);
+static void qoriq_gpio_out_en(device_t, uint32_t, uint8_t);
+static void qoriq_gpio_value_set(device_t, uint32_t, uint8_t);
+static uint32_t qoriq_gpio_value_get(device_t, uint32_t);
+static void qoriq_gpio_open_drain_set(device_t, uint32_t, uint8_t);
+static int qoriq_gpio_configure(device_t, uint32_t, uint32_t);
+
+/* GPIO API */
+static int qoriq_gpio_probe(device_t);
+static int qoriq_gpio_attach(device_t);
+static device_t qoriq_gpio_get_bus(device_t);
+static int qoriq_gpio_pin_max(device_t, int*);
+static int qoriq_gpio_pin_getname(device_t, uint32_t, char*);
+static int qoriq_gpio_pin_getflags(device_t, uint32_t, uint32_t*);
+static int qoriq_gpio_pin_setflags(device_t, uint32_t, uint32_t);
+static int qoriq_gpio_pin_getcaps(device_t, uint32_t, uint32_t*);
+static int qoriq_gpio_pin_get(device_t, uint32_t, uint32_t*);
+static int qoriq_gpio_pin_set(device_t, uint32_t, uint32_t);
+static int qoriq_gpio_pin_toggle(device_t, uint32_t);
+static int qoriq_gpio_map_gpios(device_t, phandle_t, phandle_t,
+ int, pcell_t*, uint32_t*, uint32_t*);
+static int qoriq_gpio_pin_access_32(device_t, uint32_t, uint32_t, uint32_t,
+ uint32_t*);
+static int qoriq_gpio_pin_config_32(device_t, uint32_t, uint32_t, uint32_t*);
+
+
+static device_method_t qoriq_gpio_methods[] = {
+ DEVMETHOD(device_probe, qoriq_gpio_probe),
+ DEVMETHOD(device_attach, qoriq_gpio_attach),
+
+ /* 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_getflags, qoriq_gpio_pin_getflags),
+ DEVMETHOD(gpio_pin_setflags, qoriq_gpio_pin_setflags),
+ 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_toggle, qoriq_gpio_pin_toggle),
+ DEVMETHOD(gpio_map_gpios, qoriq_gpio_map_gpios),
+ DEVMETHOD(gpio_pin_access_32, qoriq_gpio_pin_access_32),
+ DEVMETHOD(gpio_pin_config_32, qoriq_gpio_pin_config_32),
+
+ DEVMETHOD_END
+};
+
+static driver_t gpio_driver = {
+ "gpio",
+ qoriq_gpio_methods,
+ sizeof(struct gpio_softc),
+};
+
+static devclass_t gpio_devclass;
+
+DRIVER_MODULE(gpio, simplebus, gpio_driver, gpio_devclass, 0, 0);
+MODULE_VERSION(gpio, 1);
+
+/*
+ * helpers
+ */
+static int
+qoriq_make_gpio_res(device_t dev, struct gpio_res *out)
+{
+
+ out->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
+ &out->mem_rid, RF_ACTIVE | RF_SHAREABLE);
+
+ if(out->mem_res == NULL) {
+ return (1);
+ } else {
+ return (0);
+ }
+}
+
+static uint32_t
+qoriq_gpio_reg_read(device_t dev, uint32_t reg)
+{
+ struct gpio_softc *sc = device_get_softc(dev);
+ uint32_t result;
+
+ QORIQ_GPIO_ASSERT_LOCKED(sc);
+ result = bus_read_4(sc->res.mem_res, reg);
+ return be32toh(result);
+}
+
+static void
+qoriq_gpio_reg_write(device_t dev, uint32_t reg, uint32_t val)
+{
+ struct gpio_softc *sc = device_get_softc(dev);
+
+ QORIQ_GPIO_ASSERT_LOCKED(sc);
+ val = htobe32(val);
+
+ bus_write_4(sc->res.mem_res, reg, val);
+ bus_barrier(sc->res.mem_res, reg, 4, BUS_SPACE_BARRIER_READ
+ | BUS_SPACE_BARRIER_WRITE);
+}
+
+static void
+qoriq_gpio_reg_set(device_t dev, uint32_t reg, uint32_t pin)
+{
+ uint32_t reg_val;
+
+ reg_val = qoriq_gpio_reg_read(dev, reg);
+ reg_val |= GPIO(pin);
+ qoriq_gpio_reg_write(dev, reg, reg_val);
+}
+
+static void
+qoriq_gpio_reg_clear(device_t dev, uint32_t reg, uint32_t pin)
+{
+ uint32_t reg_val;
+
+ reg_val = qoriq_gpio_reg_read(dev, reg);
+ reg_val &= ~(GPIO(pin));
+ qoriq_gpio_reg_write(dev, reg, reg_val);
+}
+
+static void
+qoriq_gpio_out_en(device_t dev, uint32_t pin, uint8_t enable)
+{
+
+ if (pin >= PIN_COUNT)
+ return;
+
+ if (enable) {
+ qoriq_gpio_reg_set(dev, DIRECTION, pin);
+ } else {
+ qoriq_gpio_reg_clear(dev, DIRECTION, pin);
+ }
+}
+
+static void
+qoriq_gpio_value_set(device_t dev, uint32_t pin, uint8_t val)
+{
+
+ if (pin >= PIN_COUNT)
+ return;
+
+ if (val) {
+ qoriq_gpio_reg_set(dev, DATA, pin);
+ } else {
+ qoriq_gpio_reg_clear(dev, DATA, pin);
+ }
+}
+
+static uint32_t
+qoriq_gpio_value_get(device_t dev, uint32_t pin)
+{
+ uint32_t reg_val;
+
+ if (pin >= PIN_COUNT)
+ return (0);
+
+ reg_val = qoriq_gpio_reg_read(dev, DATA);
+ return ((reg_val & GPIO(pin)) == 0 ? 0 : 1);
+}
+
+static void
+qoriq_gpio_open_drain_set(device_t dev, uint32_t pin, uint8_t val)
+{
+
+ if (pin >= PIN_COUNT) {
+ return;
+ }
+
+ if (val) {
+ qoriq_gpio_reg_set(dev, OPEN_DRAIN, pin);
+ } else {
+ qoriq_gpio_reg_clear(dev, OPEN_DRAIN, pin);
+ }
+}
+
+static int
+qoriq_gpio_configure(device_t dev, uint32_t pin, uint32_t flags)
+{
+ struct gpio_softc *sc = device_get_softc(dev);
+ uint32_t newflags;
+
+ if (pin >= PIN_COUNT) {
+ return (EINVAL);
+ }
+
+ /*
+ * Pin cannot function as input and output at the same time.
+ * The same applies to open-drain and push-pull functionality.
+ */
+ if (((flags & GPIO_PIN_INPUT) && (flags & GPIO_PIN_OUTPUT))
+ || ((flags & GPIO_PIN_OPENDRAIN) && (flags & GPIO_PIN_PUSHPULL))) {
+ return (EINVAL);
+ }
+
+ QORIQ_GPIO_ASSERT_LOCKED(sc);
+
+ if (flags & GPIO_PIN_INPUT) {
+ newflags = GPIO_PIN_INPUT;
+ qoriq_gpio_out_en(dev, pin, 0);
+ }
+
+ if (flags & GPIO_PIN_OUTPUT) {
+ newflags = GPIO_PIN_OUTPUT;
+ qoriq_gpio_out_en(dev, pin, 1);
+
+ if (flags & GPIO_PIN_OPENDRAIN) {
+ newflags |= GPIO_PIN_OPENDRAIN;
+ qoriq_gpio_open_drain_set(dev, pin, 1);
+ } else {
+ newflags |= GPIO_PIN_PUSHPULL;
+ qoriq_gpio_open_drain_set(dev, pin, 0);
+ }
+ }
+
+ sc->setup[pin].gp_flags = newflags;
+
+ return (0);
+}
+
+/* GPIO API */
+static int
+qoriq_gpio_probe(device_t dev)
+{
+
+ if (!ofw_bus_status_okay(dev)) {
+ return (ENXIO);
+ }
+
+ if (!ofw_bus_is_compatible(dev, "fsl,qoriq-gpio")) {
+ return (ENXIO);
+ }
+
+ device_set_desc(dev, "Integrated GPIO Controller");
+ return (0);
+}
+
+static int
+qoriq_gpio_attach(device_t dev)
+{
+ struct gpio_softc *sc = device_get_softc(dev);
+ int i;
+
+ if(qoriq_make_gpio_res(dev, &sc->res) != 0) {
+ return (ENXIO);
+ }
+
+ for(i = 0; i < PIN_COUNT; i++) {
+ sc->setup[i].gp_caps = DEFAULT_CAPS;
+ }
+
+ sc->dev = dev;
+
+ sc->busdev = gpiobus_attach_bus(dev);
+ if(sc->busdev == NULL) {
+ return (ENXIO);
+ }
+
+ return (0);
+}
+
+static device_t
+qoriq_gpio_get_bus(device_t dev)
+{
+ struct gpio_softc *softc = device_get_softc(dev);
+
+ return (softc->busdev);
+}
+
+static int
+qoriq_gpio_pin_max(device_t dev, int *maxpin)
+{
+
+ if(maxpin == NULL) {
+ return (EINVAL);
+ }
+
+ *maxpin = PIN_COUNT - 1;
+ return (0);
+}
+
+static int
+qoriq_gpio_pin_getname(device_t dev, uint32_t pin, char *name)
+{
+
+ if(name == NULL || pin >= PIN_COUNT) {
+ return (EINVAL);
+ }
+
+ snprintf(name, GPIOMAXNAME, "pin %d", pin);
+
+ return (0);
+}
+
+static int
+qoriq_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t *pflags)
+{
+ struct gpio_softc *sc = device_get_softc(dev);
+
+ if (pflags == NULL || pin >= PIN_COUNT) {
+ return (EINVAL);
+ }
+
+ QORIQ_GPIO_LOCK(sc);
+ *pflags = sc->setup[pin].gp_flags;
+ QORIQ_GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+qoriq_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
+{
+ struct gpio_softc *sc = device_get_softc(dev);
+ int ret;
+
+ if (pin >= PIN_COUNT)
+ return (EINVAL);
+
+ /* Check for unwanted flags. */
+ QORIQ_GPIO_LOCK(sc);
+ if ((flags & sc->setup[pin].gp_caps) != flags) {
+ QORIQ_GPIO_UNLOCK(sc);
+ return (EINVAL);
+ }
+
+ ret = qoriq_gpio_configure(dev, pin, flags);
+
+ QORIQ_GPIO_UNLOCK(sc);
+ return (ret);
+}
+
+static int
+qoriq_gpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps)
+{
+ struct gpio_softc *sc = device_get_softc(dev);
+
+ if (caps == NULL || pin >= PIN_COUNT) {
+ return (EINVAL);
+ }
+
+ QORIQ_GPIO_LOCK(sc);
+ *caps = sc->setup[pin].gp_caps;
+ QORIQ_GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+qoriq_gpio_pin_get(device_t dev, uint32_t pin, uint32_t *value)
+{
+ struct gpio_softc *sc = device_get_softc(dev);
+
+ if (value == NULL || pin >= PIN_COUNT) {
+ return (EINVAL);
+ }
+
+ QORIQ_GPIO_LOCK(sc);
+ *value = qoriq_gpio_value_get(dev, pin);
+ QORIQ_GPIO_UNLOCK(sc);
+ return (0);
+}
+
+static int
+qoriq_gpio_pin_set(device_t dev, uint32_t pin, uint32_t value)
+{
+ struct gpio_softc *sc = device_get_softc(dev);
+
+ if (pin >= PIN_COUNT) {
+ return (EINVAL);
+ }
+
+ QORIQ_GPIO_LOCK(sc);
+ qoriq_gpio_value_set(dev, pin, value);
+ QORIQ_GPIO_UNLOCK(sc);
+ return (0);
+}
+
+static int
+qoriq_gpio_pin_toggle(device_t dev, uint32_t pin)
+{
+ struct gpio_softc *sc;
+ uint32_t value;
+
+ if (pin >= PIN_COUNT) {
+ return (EINVAL);
+ }
+
+ sc = device_get_softc(dev);
+
+ QORIQ_GPIO_LOCK(sc);
+ value = qoriq_gpio_reg_read(dev, DATA);
+ if (value & (1 << pin))
+ value &= ~(1 << pin);
+ else
+ value |= (1 << pin);
+ qoriq_gpio_reg_write(dev, DATA, value);
+ QORIQ_GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+qoriq_gpio_map_gpios(device_t bus, phandle_t dev, phandle_t gparent, int
gcells,
+ pcell_t *gpios, uint32_t *pin, uint32_t *flags)
+{
+ struct gpio_softc *sc = device_get_softc(bus);
+ int err;
+
+ if (gpios[0] >= PIN_COUNT)
+ return (EINVAL);
+
+ QORIQ_GPIO_LOCK(sc);
+ err = qoriq_gpio_configure(bus, gpios[0], gpios[1]);
+ QORIQ_GPIO_UNLOCK(sc);
+
+ if(err == 0) {
+ *pin = gpios[0];
+ *flags = gpios[1];
+ }
+
+ return (err);
+}
+
+static int
+qoriq_gpio_pin_access_32(device_t dev, uint32_t first_pin, uint32_t clear_pins,
+ uint32_t change_pins, uint32_t *orig_pins)
+{
+ struct gpio_softc *sc;
+ uint32_t hwstate;
+
+ sc = device_get_softc(dev);
+
+ if (first_pin != 0)
+ return (EINVAL);
+
+ QORIQ_GPIO_LOCK(sc);
+ hwstate = qoriq_gpio_reg_read(dev, DATA);
+ qoriq_gpio_reg_write(dev, DATA, (hwstate & ~clear_pins) ^ change_pins);
+ QORIQ_GPIO_UNLOCK(sc);
+
+ if (orig_pins != NULL)
+ *orig_pins = hwstate;
+
+ return (0);
+}
+
+static int
+qoriq_gpio_pin_config_32(device_t dev, uint32_t first_pin, uint32_t num_pins,
+ uint32_t *pin_flags)
+{
+ uint32_t dir, odr, mask, reg;
+ struct gpio_softc *sc;
+ uint32_t newflags[32];
+ int i;
+
+ if (first_pin != 0 || num_pins > PIN_COUNT)
+ return (EINVAL);
+
+ sc = device_get_softc(dev);
+
+ dir = 0;
+ odr = 0;
+ mask = 0;
+
+ for (i = 0; i < num_pins; i++) {
+ newflags[i] = 0;
+ mask |= (1 << i);
+
+ if (pin_flags[i] & GPIO_PIN_INPUT) {
+ newflags[i] = GPIO_PIN_INPUT;
+ dir &= ~(1 << i);
+ } else {
+ newflags[i] = GPIO_PIN_OUTPUT;
+ dir |= (1 << i);
+
+ if (pin_flags[i] & GPIO_PIN_OPENDRAIN) {
+ newflags[i] |= GPIO_PIN_OPENDRAIN;
+ odr |= (1 << i);
+ } else {
+ newflags[i] |= GPIO_PIN_PUSHPULL;
+ odr &= ~(1 << i);
+ }
+ }
+ }
+
+ QORIQ_GPIO_LOCK(sc);
+ reg = qoriq_gpio_reg_read(dev, DIRECTION);
+ reg &= ~mask;
+ reg |= dir;
+ qoriq_gpio_reg_write(dev, DIRECTION, reg);
+ reg = qoriq_gpio_reg_read(dev, OPEN_DRAIN);
+ reg &= ~mask;
+ reg |= odr;
+ qoriq_gpio_reg_write(dev, OPEN_DRAIN, reg);
+ for (i = 0; i < num_pins; i++) {
+ sc->setup[i].gp_flags = newflags[i];
+ }
+ QORIQ_GPIO_UNLOCK(sc);
+
+ return (0);
+}
Modified: head/sys/conf/files.arm64
==============================================================================
--- head/sys/conf/files.arm64 Mon May 25 14:45:18 2020 (r361459)
+++ head/sys/conf/files.arm64 Mon May 25 14:55:37 2020 (r361460)
@@ -196,6 +196,7 @@ arm64/coresight/coresight-tmc.c standard
arm64/intel/firmware.c optional soc_intel_stratix10
arm64/intel/stratix10-soc-fpga-mgr.c optional soc_intel_stratix10
arm64/intel/stratix10-svc.c optional soc_intel_stratix10
+arm64/qoriq/ls1046_gpio.c optional ls1046_gpio gpio fdt
SOC_NXP_LS
arm64/qoriq/clk/ls1046a_clkgen.c optional clk SOC_NXP_LS
arm64/qoriq/clk/qoriq_clk_pll.c optional clk SOC_NXP_LS
arm64/qoriq/clk/qoriq_clkgen.c optional clk SOC_NXP_LS
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