imx: Use RTEMS GPIO driver instead of FreeBSD one

Update 3869

2 files changed, 307 insertions, 1 deletions

diff --git a/rtemsbsd/include/bsp/nexus-devices.h b/rtemsbsd/include/bsp/nexus-devices.h
index e8b7eaf3..94013564 100644
--- a/rtemsbsd/include/bsp/nexus-devices.h
+++ b/rtemsbsd/include/bsp/nexus-devices.h
@@ -137,7 +137,7 @@ RTEMS_BSD_DRIVER_USB_MASS;
 SYSINIT_DRIVER_REFERENCE(ffec, simplebus);
 SYSINIT_DRIVER_REFERENCE(ukphy, miibus);
 
-SYSINIT_DRIVER_REFERENCE(imx51_gpio, simplebus);
+SYSINIT_DRIVER_REFERENCE(imx_rtems_gpio, simplebus);
 SYSINIT_DRIVER_REFERENCE(sdhci_fsl, simplebus);
 RTEMS_BSD_DRIVER_MMC;
 
diff --git a/rtemsbsd/sys/arm/freescale/imx/imx_rtems_gpio.c b/rtemsbsd/sys/arm/freescale/imx/imx_rtems_gpio.c
new file mode 100644
index 00000000..c24732cc
--- /dev/null
+++ b/rtemsbsd/sys/arm/freescale/imx/imx_rtems_gpio.c
@@ -0,0 +1,306 @@
+#include <machine/rtems-bsd-kernel-space.h>
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/*
+ * Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
+ *
+ * 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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 <bsp.h>
+#if defined(LIBBSP_ARM_IMX_BSP_H)
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/gpio.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/gpio/gpiobusvar.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <bsp/imx-gpio.h>
+
+#define MAXPIN		(32)
+
+#define VALID_PIN(u)	((u) >= 0 && (u) <= MAXPIN)
+
+struct imx_rtems_gpio_softc {
+	device_t		dev;
+	device_t		busdev;
+	struct imx_gpio		*imx_gpio;
+	struct {
+		struct imx_gpio_pin	pin;
+		bool			initialized;
+		uint32_t		flags;
+	} pin[MAXPIN];
+};
+
+static device_t
+imx_rtems_gpio_get_bus(device_t dev)
+{
+	struct imx_rtems_gpio_softc *sc = device_get_softc(dev);
+
+	return (sc->busdev);
+}
+
+static int
+imx_rtems_gpio_pin_max(device_t dev, int *maxpin)
+{
+
+	*maxpin = MAXPIN;
+	return (0);
+}
+
+static int
+imx_rtems_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);
+
+	return (0);
+}
+
+/* Get a specific pin's name. */
+static int
+imx_rtems_gpio_pin_getname(device_t dev, uint32_t pin, char *name)
+{
+	struct imx_rtems_gpio_softc *sc = device_get_softc(dev);
+
+	if (!VALID_PIN(pin))
+		return (EINVAL);
+
+	snprintf(name, GPIOMAXNAME, "%s_%d",
+	    imx_gpio_get_name(sc->imx_gpio), pin);
+	name[GPIOMAXNAME-1] = '\0';
+
+	return (0);
+}
+
+static void
+imx_rtems_gpio_pin_init(struct imx_rtems_gpio_softc *sc, uint32_t pin)
+{
+	imx_gpio_init(&sc->pin[pin].pin);
+	sc->pin[pin].initialized = true;
+}
+
+static int
+imx_rtems_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value)
+{
+	struct imx_rtems_gpio_softc *sc = device_get_softc(dev);
+
+	if (!VALID_PIN(pin) || value > 1)
+		return (EINVAL);
+
+	if (!sc->pin[pin].initialized) {
+		imx_rtems_gpio_pin_init(sc, pin);
+	}
+
+	imx_gpio_set_output(&sc->pin[pin].pin, value);
+
+	return (0);
+}
+
+static int
+imx_rtems_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *value)
+{
+	struct imx_rtems_gpio_softc *sc = device_get_softc(dev);
+
+	if (!VALID_PIN(pin))
+		return (EINVAL);
+
+	if (!sc->pin[pin].initialized) {
+		imx_rtems_gpio_pin_init(sc, pin);
+	}
+
+	*value = imx_gpio_get_input(&sc->pin[pin].pin);
+
+	return (0);
+}
+
+static int
+imx_rtems_gpio_pin_toggle(device_t dev, uint32_t pin)
+{
+	struct imx_rtems_gpio_softc *sc = device_get_softc(dev);
+
+	if (!VALID_PIN(pin))
+		return (EINVAL);
+
+	if (!sc->pin[pin].initialized) {
+		imx_rtems_gpio_pin_init(sc, pin);
+	}
+
+	imx_gpio_toggle_output(&sc->pin[pin].pin);
+
+	return (0);
+}
+
+static int
+imx_rtems_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t *flags)
+{
+	struct imx_rtems_gpio_softc *sc = device_get_softc(dev);
+
+	if (!VALID_PIN(pin))
+		return (EINVAL);
+
+	*flags = sc->pin[pin].flags;
+
+	return (0);
+}
+
+static int
+imx_rtems_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
+{
+	struct imx_rtems_gpio_softc *sc = device_get_softc(dev);
+
+	if (!VALID_PIN(pin))
+		return (EINVAL);
+
+	if (flags & (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT)) {
+		if (flags & GPIO_PIN_PRESET_LOW) {
+			imx_gpio_set_output(&sc->pin[pin].pin, 0);
+		} else if (flags & GPIO_PIN_PRESET_HIGH) {
+			imx_gpio_set_output(&sc->pin[pin].pin, 1);
+		}
+		if (flags & GPIO_PIN_OUTPUT) {
+			sc->pin[pin].pin.mode = IMX_GPIO_MODE_OUTPUT;
+		} else {
+			sc->pin[pin].pin.mode = IMX_GPIO_MODE_INPUT;
+		}
+		imx_rtems_gpio_pin_init(sc, pin);
+		sc->pin[pin].flags = flags;
+	} else {
+		return (EINVAL);
+	}
+
+	return (0);
+}
+
+static struct ofw_compat_data compat_data[] = {
+	{"fsl,imx35-gpio",  1},
+	{"fsl,imx7d-gpio",  1},
+	{NULL,              0}
+};
+
+static int
+imx_rtems_gpio_probe(device_t dev)
+{
+	if (!ofw_bus_status_okay(dev))
+		return (ENXIO);
+
+	if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) {
+		device_set_desc(dev, "Freescale i.MX GPIO Controller (RTEMS)");
+		return (BUS_PROBE_DEFAULT);
+	}
+	
+	return (ENXIO);
+}
+
+static int
+imx_rtems_gpio_attach(device_t dev)
+{
+	struct imx_rtems_gpio_softc *sc = device_get_softc(dev);
+	u_long base, size;
+	size_t i;
+
+	sc->dev = dev;
+
+	/* Get register address */
+	if (fdt_regsize(ofw_bus_get_node(sc->dev), &base, &size) != 0) {
+		device_printf(dev, "Can't get register address");
+		return (EINVAL);
+	}
+
+	sc->imx_gpio = imx_gpio_get_by_register((void *)base);
+	if (sc->imx_gpio == NULL) {
+		device_printf(dev, "Can't get RTEMS imx_gpio handle");
+		return (EINVAL);
+	}
+
+	memset(sc->pin, 0, sizeof(sc->pin));
+	for (i = 0; i < MAXPIN; ++i) {
+		sc->pin[i].pin.gpio = sc->imx_gpio;
+		sc->pin[i].pin.mask = 1 << i;
+		sc->pin[i].pin.shift = i;
+		sc->pin[i].pin.mode = IMX_GPIO_MODE_INPUT;
+	}
+	/*
+	 * Do _not_ initialize the pins here. Otherwise we would overwrite prior
+	 * initializations done by other application parts.
+	 */
+
+	sc->busdev = gpiobus_attach_bus(dev);
+	if (sc->busdev == NULL) {
+		return (ENOMEM);
+	}
+
+	return (0);
+}
+
+static int
+imx_rtems_gpio_detach(device_t dev)
+{
+	gpiobus_detach_bus(dev);
+
+	return (0);
+}
+
+static device_method_t imx_rtems_gpio_methods[] = {
+	/* device_if */
+	DEVMETHOD(device_probe,		imx_rtems_gpio_probe),
+	DEVMETHOD(device_attach,	imx_rtems_gpio_attach),
+	DEVMETHOD(device_detach,	imx_rtems_gpio_detach),
+
+	/* GPIO protocol */
+	DEVMETHOD(gpio_get_bus,		imx_rtems_gpio_get_bus),
+	DEVMETHOD(gpio_pin_max,		imx_rtems_gpio_pin_max),
+	DEVMETHOD(gpio_pin_getname,	imx_rtems_gpio_pin_getname),
+	DEVMETHOD(gpio_pin_getflags,	imx_rtems_gpio_pin_getflags),
+	DEVMETHOD(gpio_pin_getcaps,	imx_rtems_gpio_pin_getcaps),
+	DEVMETHOD(gpio_pin_get,		imx_rtems_gpio_pin_get),
+	DEVMETHOD(gpio_pin_setflags,	imx_rtems_gpio_pin_setflags),
+	DEVMETHOD(gpio_pin_set,		imx_rtems_gpio_pin_set),
+	DEVMETHOD(gpio_pin_toggle,	imx_rtems_gpio_pin_toggle),
+
+	DEVMETHOD_END
+};
+
+static driver_t imx_rtems_gpio_driver = {
+	"gpio",
+	imx_rtems_gpio_methods,
+	sizeof(struct imx_rtems_gpio_softc),
+};
+static devclass_t imx_rtems_gpio_devclass;
+
+EARLY_DRIVER_MODULE(imx_rtems_gpio, simplebus, imx_rtems_gpio_driver,
+    imx_rtems_gpio_devclass, NULL, NULL,
+    BUS_PASS_RESOURCE + BUS_PASS_ORDER_MIDDLE);
+
+#endif /* LIBBSP_ARM_IMX_BSP_H */