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-rw-r--r--sys/riscv/starfive/jh7110_gpio.c368
1 files changed, 368 insertions, 0 deletions
diff --git a/sys/riscv/starfive/jh7110_gpio.c b/sys/riscv/starfive/jh7110_gpio.c
new file mode 100644
index 000000000000..1ed7d9f42259
--- /dev/null
+++ b/sys/riscv/starfive/jh7110_gpio.c
@@ -0,0 +1,368 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2023 Jari Sihvola <jsihv@gmx.com>
+ */
+
+#include <sys/cdefs.h>
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+
+#include <sys/gpio.h>
+#include <sys/kernel.h>
+#include <sys/lock.h>
+#include <sys/module.h>
+#include <sys/mutex.h>
+#include <sys/rman.h>
+
+#include <machine/bus.h>
+#include <machine/intr.h>
+#include <machine/resource.h>
+
+#include <dev/clk/clk.h>
+#include <dev/gpio/gpiobusvar.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include "gpio_if.h"
+
+#define GPIO_PINS 64
+#define GPIO_REGS 2
+
+#define GP0_DOEN_CFG 0x0
+#define GP0_DOUT_CFG 0x40
+#define GPIOEN 0xdc
+#define GPIOE_0 0x100
+#define GPIOE_1 0x104
+#define GPIO_DIN_LOW 0x118
+#define GPIO_DIN_HIGH 0x11c
+#define IOMUX_SYSCFG_288 0x120
+
+#define PAD_INPUT_EN (1 << 0)
+#define PAD_PULLUP (1 << 3)
+#define PAD_PULLDOWN (1 << 4)
+#define PAD_HYST (1 << 6)
+
+#define ENABLE_MASK 0x3f
+#define DATA_OUT_MASK 0x7f
+#define DIROUT_DISABLE 1
+
+struct jh7110_gpio_softc {
+ device_t dev;
+ device_t busdev;
+ struct mtx mtx;
+ struct resource *res;
+ clk_t clk;
+};
+
+static struct ofw_compat_data compat_data[] = {
+ {"starfive,jh7110-sys-pinctrl", 1},
+ {NULL, 0}
+};
+
+static struct resource_spec jh7110_gpio_spec[] = {
+ { SYS_RES_MEMORY, 0, RF_ACTIVE },
+ { -1, 0 }
+};
+
+#define GPIO_RW_OFFSET(_val) (_val & ~3)
+#define GPIO_SHIFT(_val) ((_val & 3) * 8)
+#define PAD_OFFSET(_val) (_val * 4)
+
+#define JH7110_GPIO_LOCK(_sc) mtx_lock(&(_sc)->mtx)
+#define JH7110_GPIO_UNLOCK(_sc) mtx_unlock(&(_sc)->mtx)
+
+#define JH7110_GPIO_READ(sc, reg) bus_read_4((sc)->res, (reg))
+#define JH7110_GPIO_WRITE(sc, reg, val) bus_write_4((sc)->res, (reg), (val))
+
+static device_t
+jh7110_gpio_get_bus(device_t dev)
+{
+ struct jh7110_gpio_softc *sc;
+
+ sc = device_get_softc(dev);
+
+ return (sc->busdev);
+}
+
+static int
+jh7110_gpio_pin_max(device_t dev, int *maxpin)
+{
+ *maxpin = GPIO_PINS - 1;
+
+ return (0);
+}
+
+static int
+jh7110_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *val)
+{
+ struct jh7110_gpio_softc *sc;
+ uint32_t reg;
+
+ sc = device_get_softc(dev);
+
+ if (pin >= GPIO_PINS)
+ return (EINVAL);
+
+ JH7110_GPIO_LOCK(sc);
+ if (pin < GPIO_PINS / GPIO_REGS) {
+ reg = JH7110_GPIO_READ(sc, GPIO_DIN_LOW);
+ *val = (reg >> pin) & 0x1;
+ } else {
+ reg = JH7110_GPIO_READ(sc, GPIO_DIN_HIGH);
+ *val = (reg >> (pin - GPIO_PINS / GPIO_REGS)) & 0x1;
+ }
+ JH7110_GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+jh7110_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value)
+{
+ struct jh7110_gpio_softc *sc;
+ uint32_t reg;
+
+ sc = device_get_softc(dev);
+
+ if (pin >= GPIO_PINS)
+ return (EINVAL);
+
+ JH7110_GPIO_LOCK(sc);
+ reg = JH7110_GPIO_READ(sc, GP0_DOUT_CFG + GPIO_RW_OFFSET(pin));
+ reg &= ~(DATA_OUT_MASK << GPIO_SHIFT(pin));
+ if (value)
+ reg |= 0x1 << GPIO_SHIFT(pin);
+ JH7110_GPIO_WRITE(sc, GP0_DOUT_CFG + GPIO_RW_OFFSET(pin), reg);
+ JH7110_GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+jh7110_gpio_pin_toggle(device_t dev, uint32_t pin)
+{
+ struct jh7110_gpio_softc *sc;
+ uint32_t reg;
+
+ sc = device_get_softc(dev);
+
+ if (pin >= GPIO_PINS)
+ return (EINVAL);
+
+ JH7110_GPIO_LOCK(sc);
+ reg = JH7110_GPIO_READ(sc, GP0_DOUT_CFG + GPIO_RW_OFFSET(pin));
+ if (reg & 0x1 << GPIO_SHIFT(pin)) {
+ reg &= ~(DATA_OUT_MASK << GPIO_SHIFT(pin));
+ } else {
+ reg &= ~(DATA_OUT_MASK << GPIO_SHIFT(pin));
+ reg |= 0x1 << GPIO_SHIFT(pin);
+ }
+ JH7110_GPIO_WRITE(sc, GP0_DOUT_CFG + GPIO_RW_OFFSET(pin), reg);
+ JH7110_GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+jh7110_gpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps)
+{
+ if (pin >= GPIO_PINS)
+ return (EINVAL);
+
+ *caps = (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT);
+
+ return (0);
+}
+
+static int
+jh7110_gpio_pin_getname(device_t dev, uint32_t pin, char *name)
+{
+ if (pin >= GPIO_PINS)
+ return (EINVAL);
+
+ snprintf(name, GPIOMAXNAME, "GPIO%d", pin);
+
+ return (0);
+}
+
+static int
+jh7110_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t *flags)
+{
+ struct jh7110_gpio_softc *sc;
+ uint32_t reg;
+
+ sc = device_get_softc(dev);
+
+ if (pin >= GPIO_PINS)
+ return (EINVAL);
+
+ /* Reading the direction */
+ JH7110_GPIO_LOCK(sc);
+ reg = JH7110_GPIO_READ(sc, GP0_DOEN_CFG + GPIO_RW_OFFSET(pin));
+ if ((reg & ENABLE_MASK << GPIO_SHIFT(pin)) == 0)
+ *flags |= GPIO_PIN_OUTPUT;
+ else
+ *flags |= GPIO_PIN_INPUT;
+ JH7110_GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+jh7110_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
+{
+ struct jh7110_gpio_softc *sc;
+ uint32_t reg;
+
+ sc = device_get_softc(dev);
+
+ if (pin >= GPIO_PINS)
+ return (EINVAL);
+
+ /* Setting the direction, enable or disable output, configuring pads */
+
+ JH7110_GPIO_LOCK(sc);
+
+ if (flags & GPIO_PIN_INPUT) {
+ reg = JH7110_GPIO_READ(sc, IOMUX_SYSCFG_288 + PAD_OFFSET(pin));
+ reg |= (PAD_INPUT_EN | PAD_HYST);
+ JH7110_GPIO_WRITE(sc, IOMUX_SYSCFG_288 + PAD_OFFSET(pin), reg);
+ }
+
+ reg = JH7110_GPIO_READ(sc, GP0_DOEN_CFG + GPIO_RW_OFFSET(pin));
+ reg &= ~(ENABLE_MASK << GPIO_SHIFT(pin));
+ if (flags & GPIO_PIN_INPUT) {
+ reg |= DIROUT_DISABLE << GPIO_SHIFT(pin);
+ }
+ JH7110_GPIO_WRITE(sc, GP0_DOEN_CFG + GPIO_RW_OFFSET(pin), reg);
+
+ if (flags & GPIO_PIN_OUTPUT) {
+ reg = JH7110_GPIO_READ(sc, GP0_DOUT_CFG + GPIO_RW_OFFSET(pin));
+ reg &= ~(ENABLE_MASK << GPIO_SHIFT(pin));
+ reg |= 0x1 << GPIO_SHIFT(pin);
+ JH7110_GPIO_WRITE(sc, GP0_DOUT_CFG + GPIO_RW_OFFSET(pin), reg);
+
+ reg = JH7110_GPIO_READ(sc, IOMUX_SYSCFG_288 + PAD_OFFSET(pin));
+ reg &= ~(PAD_INPUT_EN | PAD_PULLUP | PAD_PULLDOWN | PAD_HYST);
+ JH7110_GPIO_WRITE(sc, IOMUX_SYSCFG_288 + PAD_OFFSET(pin), reg);
+ }
+
+ JH7110_GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+jh7110_gpio_probe(device_t dev)
+{
+ if (!ofw_bus_status_okay(dev))
+ return (ENXIO);
+
+ if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
+ return (ENXIO);
+
+ device_set_desc(dev, "StarFive JH7110 GPIO controller");
+
+ return (BUS_PROBE_DEFAULT);
+}
+
+static int
+jh7110_gpio_detach(device_t dev)
+{
+ struct jh7110_gpio_softc *sc;
+
+ sc = device_get_softc(dev);
+
+ bus_release_resources(dev, jh7110_gpio_spec, &sc->res);
+ if (sc->busdev != NULL)
+ gpiobus_detach_bus(dev);
+ if (sc->clk != NULL)
+ clk_release(sc->clk);
+ mtx_destroy(&sc->mtx);
+
+ return (0);
+}
+
+static int
+jh7110_gpio_attach(device_t dev)
+{
+ struct jh7110_gpio_softc *sc;
+
+ sc = device_get_softc(dev);
+ sc->dev = dev;
+
+ mtx_init(&sc->mtx, device_get_nameunit(sc->dev), NULL, MTX_DEF);
+
+ if (bus_alloc_resources(dev, jh7110_gpio_spec, &sc->res) != 0) {
+ device_printf(dev, "Could not allocate resources\n");
+ bus_release_resources(dev, jh7110_gpio_spec, &sc->res);
+ mtx_destroy(&sc->mtx);
+ return (ENXIO);
+ }
+
+ if (clk_get_by_ofw_index(dev, 0, 0, &sc->clk) != 0) {
+ device_printf(dev, "Cannot get clock\n");
+ jh7110_gpio_detach(dev);
+ return (ENXIO);
+ }
+
+ if (clk_enable(sc->clk) != 0) {
+ device_printf(dev, "Could not enable clock %s\n",
+ clk_get_name(sc->clk));
+ jh7110_gpio_detach(dev);
+ return (ENXIO);
+ }
+
+ /* Reseting GPIO interrupts */
+ JH7110_GPIO_WRITE(sc, GPIOE_0, 0);
+ JH7110_GPIO_WRITE(sc, GPIOE_1, 0);
+ JH7110_GPIO_WRITE(sc, GPIOEN, 1);
+
+ sc->busdev = gpiobus_add_bus(dev);
+ if (sc->busdev == NULL) {
+ device_printf(dev, "Cannot attach gpiobus\n");
+ jh7110_gpio_detach(dev);
+ return (ENXIO);
+ }
+
+ bus_attach_children(dev);
+ return (0);
+}
+
+static phandle_t
+jh7110_gpio_get_node(device_t bus, device_t dev)
+{
+ return (ofw_bus_get_node(bus));
+}
+
+static device_method_t jh7110_gpio_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, jh7110_gpio_probe),
+ DEVMETHOD(device_attach, jh7110_gpio_attach),
+ DEVMETHOD(device_detach, jh7110_gpio_detach),
+
+ /* GPIO protocol */
+ DEVMETHOD(gpio_get_bus, jh7110_gpio_get_bus),
+ DEVMETHOD(gpio_pin_max, jh7110_gpio_pin_max),
+ DEVMETHOD(gpio_pin_get, jh7110_gpio_pin_get),
+ DEVMETHOD(gpio_pin_set, jh7110_gpio_pin_set),
+ DEVMETHOD(gpio_pin_toggle, jh7110_gpio_pin_toggle),
+ DEVMETHOD(gpio_pin_getflags, jh7110_gpio_pin_getflags),
+ DEVMETHOD(gpio_pin_setflags, jh7110_gpio_pin_setflags),
+ DEVMETHOD(gpio_pin_getcaps, jh7110_gpio_pin_getcaps),
+ DEVMETHOD(gpio_pin_getname, jh7110_gpio_pin_getname),
+
+ /* ofw_bus interface */
+ DEVMETHOD(ofw_bus_get_node, jh7110_gpio_get_node),
+
+ DEVMETHOD_END
+};
+
+DEFINE_CLASS_0(gpio, jh7110_gpio_driver, jh7110_gpio_methods,
+ sizeof(struct jh7110_gpio_softc));
+EARLY_DRIVER_MODULE(jh7110_gpio, simplebus, jh7110_gpio_driver, 0, 0,
+ BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
+MODULE_DEPEND(jh7110_gpio, gpiobus, 1, 1, 1);
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-19 10:32:26 +0000