git: ec556724d7ad - main - Add interrupt handling to rk_gpio driver.
Date: Sat, 20 Aug 2022 11:32:26 UTC
The branch main has been updated by ganbold:
URL: https://cgit.FreeBSD.org/src/commit/?id=ec556724d7ad1ee117fe595728e73dc9ddf78048
commit ec556724d7ad1ee117fe595728e73dc9ddf78048
Author: Søren Schmidt <sos@FreeBSD.org>
AuthorDate: 2022-08-20 06:09:49 +0000
Commit: Ganbold Tsagaankhuu <ganbold@FreeBSD.org>
CommitDate: 2022-08-20 11:30:54 +0000
Add interrupt handling to rk_gpio driver.
---
sys/arm64/rockchip/rk_gpio.c | 227 ++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 226 insertions(+), 1 deletion(-)
diff --git a/sys/arm64/rockchip/rk_gpio.c b/sys/arm64/rockchip/rk_gpio.c
index c9ad1c9ea1df..c3b1044df2f7 100644
--- a/sys/arm64/rockchip/rk_gpio.c
+++ b/sys/arm64/rockchip/rk_gpio.c
@@ -36,6 +36,7 @@ __FBSDID("$FreeBSD$");
#include <sys/kernel.h>
#include <sys/module.h>
+#include <sys/proc.h>
#include <sys/rman.h>
#include <sys/lock.h>
#include <sys/mutex.h>
@@ -51,6 +52,7 @@ __FBSDID("$FreeBSD$");
#include <dev/extres/clk/clk.h>
#include "gpio_if.h"
+#include "pic_if.h"
#include "fdt_pinctrl_if.h"
@@ -73,7 +75,9 @@ enum gpio_regs {
#define RK_GPIO_LS_SYNC 0x60 /* Level sensitive syncronization enable register */
#define RK_GPIO_DEFAULT_CAPS (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT | \
- GPIO_PIN_PULLUP | GPIO_PIN_PULLDOWN)
+ GPIO_PIN_PULLUP | GPIO_PIN_PULLDOWN | GPIO_INTR_EDGE_BOTH | \
+ GPIO_INTR_EDGE_RISING | GPIO_INTR_EDGE_FALLING | \
+ GPIO_INTR_LEVEL_HIGH | GPIO_INTR_LEVEL_LOW)
#define GPIO_FLAGS_PINCTRL GPIO_PIN_PULLUP | GPIO_PIN_PULLDOWN
#define RK_GPIO_MAX_PINS 32
@@ -83,6 +87,12 @@ struct pin_cached {
uint32_t flags;
};
+struct rk_pin_irqsrc {
+ struct intr_irqsrc isrc;
+ uint32_t irq;
+ uint32_t mode;
+};
+
struct rk_gpio_softc {
device_t sc_dev;
device_t sc_busdev;
@@ -97,6 +107,8 @@ struct rk_gpio_softc {
uint32_t version;
struct pin_cached pin_cached[RK_GPIO_MAX_PINS];
uint8_t regs[RK_GPIO_REGNUM];
+ void *ihandle;
+ struct rk_pin_irqsrc isrcs[RK_GPIO_MAX_PINS];
};
static struct ofw_compat_data compat_data[] = {
@@ -113,6 +125,7 @@ static struct resource_spec rk_gpio_spec[] = {
#define RK_GPIO_VERSION 0x78
#define RK_GPIO_TYPE_V1 0x00000000
#define RK_GPIO_TYPE_V2 0x01000c2b
+#define RK_GPIO_ISRC(sc, irq) (&(sc->isrcs[irq].isrc))
static int rk_gpio_detach(device_t dev);
@@ -141,6 +154,29 @@ rk_gpio_read_bit(struct rk_gpio_softc *sc, int reg, int bit)
return (value & 1);
}
+static void
+rk_gpio_write_bit(struct rk_gpio_softc *sc, int reg, int bit, int data)
+{
+ int offset = sc->regs[reg];
+ uint32_t value;
+
+ if (sc->version == RK_GPIO_TYPE_V1) {
+ value = RK_GPIO_READ(sc, offset);
+ if (data)
+ value |= (1 << bit);
+ else
+ value &= ~(1 << bit);
+ RK_GPIO_WRITE(sc, offset, value);
+ } else {
+ if (data)
+ value = (1 << (bit % 16));
+ else
+ value = 0;
+ value |= (1 << ((bit % 16) + 16));
+ RK_GPIO_WRITE(sc, bit > 15 ? offset + 4 : offset, value);
+ }
+}
+
static uint32_t
rk_gpio_read_4(struct rk_gpio_softc *sc, int reg)
{
@@ -168,6 +204,43 @@ rk_gpio_write_4(struct rk_gpio_softc *sc, int reg, uint32_t value)
}
}
+static int
+rk_gpio_intr(void *arg)
+{
+ struct rk_gpio_softc *sc = (struct rk_gpio_softc *)arg;;
+ struct trapframe *tf = curthread->td_intr_frame;
+ uint32_t status;
+
+ RK_GPIO_LOCK(sc);
+ status = rk_gpio_read_4(sc, RK_GPIO_INT_STATUS);
+ rk_gpio_write_4(sc, RK_GPIO_PORTA_EOI, status);
+ RK_GPIO_UNLOCK(sc);
+
+ while (status) {
+ int pin = ffs(status) - 1;
+
+ status &= ~(1 << pin);
+ if (intr_isrc_dispatch(RK_GPIO_ISRC(sc, pin), tf)) {
+ device_printf(sc->sc_dev, "Interrupt pin=%d unhandled\n",
+ pin);
+ continue;
+ }
+
+ if ((sc->version == RK_GPIO_TYPE_V1) &&
+ (sc->isrcs[pin].mode & GPIO_INTR_EDGE_BOTH)) {
+ RK_GPIO_LOCK(sc);
+ if (rk_gpio_read_bit(sc, RK_GPIO_EXT_PORTA, pin))
+ rk_gpio_write_bit(sc, RK_GPIO_INT_POLARITY,
+ (1 << pin), 0);
+ else
+ rk_gpio_write_bit(sc, RK_GPIO_INT_POLARITY,
+ (1 << pin), 1);
+ RK_GPIO_UNLOCK(sc);
+ }
+ }
+ return (FILTER_HANDLED);
+}
+
static int
rk_gpio_probe(device_t dev)
{
@@ -221,6 +294,15 @@ rk_gpio_attach(device_t dev)
rk_gpio_detach(dev);
return (ENXIO);
}
+
+ if ((err = bus_setup_intr(dev, sc->sc_res[1],
+ INTR_TYPE_MISC | INTR_MPSAFE, rk_gpio_intr, NULL,
+ sc, &sc->ihandle))) {
+ device_printf(dev, "Can not setup IRQ\n");
+ rk_gpio_detach(dev);
+ return (ENXIO);
+ }
+
RK_GPIO_LOCK(sc);
sc->version = rk_gpio_read_4(sc, RK_GPIO_VERSION);
RK_GPIO_UNLOCK(sc);
@@ -259,6 +341,23 @@ rk_gpio_attach(device_t dev)
return (ENXIO);
}
+ for (i = 0; i < RK_GPIO_MAX_PINS; i++) {
+ sc->isrcs[i].irq = i;
+ sc->isrcs[i].mode = GPIO_INTR_CONFORM;
+ if ((err = intr_isrc_register(RK_GPIO_ISRC(sc, i),
+ dev, 0, "%s", device_get_nameunit(dev)))) {
+ device_printf(dev, "Can not register isrc %d\n", err);
+ rk_gpio_detach(dev);
+ return (ENXIO);
+ }
+ }
+
+ if (intr_pic_register(dev, OF_xref_from_node(node)) == NULL) {
+ device_printf(dev, "Can not register pic\n");
+ rk_gpio_detach(dev);
+ return (ENXIO);
+ }
+
sc->sc_busdev = gpiobus_attach_bus(dev);
if (sc->sc_busdev == NULL) {
rk_gpio_detach(dev);
@@ -549,6 +648,127 @@ rk_gpio_get_node(device_t bus, device_t dev)
return (ofw_bus_get_node(bus));
}
+static int
+rk_pic_map_intr(device_t dev, struct intr_map_data *data,
+ struct intr_irqsrc **isrcp)
+{
+ struct rk_gpio_softc *sc = device_get_softc(dev);
+ struct intr_map_data_gpio *gdata;
+ uint32_t irq;
+
+ if (data->type != INTR_MAP_DATA_GPIO) {
+ device_printf(dev, "Wrong type\n");
+ return (ENOTSUP);
+ }
+ gdata = (struct intr_map_data_gpio *)data;
+ irq = gdata->gpio_pin_num;
+ if (irq >= RK_GPIO_MAX_PINS) {
+ device_printf(dev, "Invalid interrupt %u\n", irq);
+ return (EINVAL);
+ }
+ *isrcp = RK_GPIO_ISRC(sc, irq);
+ return (0);
+}
+
+static int
+rk_pic_setup_intr(device_t dev, struct intr_irqsrc *isrc,
+ struct resource *res, struct intr_map_data *data)
+{
+ struct rk_gpio_softc *sc = device_get_softc(dev);
+ struct rk_pin_irqsrc *rkisrc = (struct rk_pin_irqsrc *)isrc;
+ struct intr_map_data_gpio *gdata;
+ uint32_t mode;
+ uint8_t pin;
+
+ if (!data) {
+ device_printf(dev, "No map data\n");
+ return (ENOTSUP);
+ }
+ gdata = (struct intr_map_data_gpio *)data;
+ mode = gdata->gpio_intr_mode;
+ pin = gdata->gpio_pin_num;
+
+ if (rkisrc->irq != gdata->gpio_pin_num) {
+ device_printf(dev, "Interrupts don't match\n");
+ return (EINVAL);
+ }
+
+ if (isrc->isrc_handlers != 0) {
+ device_printf(dev, "Handler already attached\n");
+ return (rkisrc->mode == mode ? 0 : EINVAL);
+ }
+ rkisrc->mode = mode;
+
+ RK_GPIO_LOCK(sc);
+
+ switch (mode & GPIO_INTR_MASK) {
+ case GPIO_INTR_EDGE_RISING:
+ rk_gpio_write_bit(sc, RK_GPIO_SWPORTA_DDR, pin, 0);
+ rk_gpio_write_bit(sc, RK_GPIO_INTTYPE_LEVEL, pin, 1);
+ rk_gpio_write_bit(sc, RK_GPIO_INT_POLARITY, pin, 1);
+ break;
+ case GPIO_INTR_EDGE_FALLING:
+ rk_gpio_write_bit(sc, RK_GPIO_SWPORTA_DDR, pin, 0);
+ rk_gpio_write_bit(sc, RK_GPIO_INTTYPE_LEVEL, pin, 1);
+ rk_gpio_write_bit(sc, RK_GPIO_INT_POLARITY, pin, 0);
+ break;
+ case GPIO_INTR_EDGE_BOTH:
+ rk_gpio_write_bit(sc, RK_GPIO_SWPORTA_DDR, pin, 0);
+ rk_gpio_write_bit(sc, RK_GPIO_INTTYPE_LEVEL, pin, 1);
+ if (sc->version == RK_GPIO_TYPE_V1) {
+ if (rk_gpio_read_bit(sc, RK_GPIO_EXT_PORTA, pin))
+ rk_gpio_write_bit(sc, RK_GPIO_INT_POLARITY,
+ pin, 0);
+ else
+ rk_gpio_write_bit(sc, RK_GPIO_INT_POLARITY,
+ pin, 1);
+ } else
+ rk_gpio_write_bit(sc, RK_GPIO_INTTYPE_BOTH, pin, 1);
+ break;
+ case GPIO_INTR_LEVEL_HIGH:
+ rk_gpio_write_bit(sc, RK_GPIO_SWPORTA_DDR, pin, 0);
+ rk_gpio_write_bit(sc, RK_GPIO_INTTYPE_LEVEL, pin, 0);
+ rk_gpio_write_bit(sc, RK_GPIO_INT_POLARITY, pin, 1);
+ break;
+ case GPIO_INTR_LEVEL_LOW:
+ rk_gpio_write_bit(sc, RK_GPIO_SWPORTA_DDR, pin, 0);
+ rk_gpio_write_bit(sc, RK_GPIO_INTTYPE_LEVEL, pin, 0);
+ rk_gpio_write_bit(sc, RK_GPIO_INT_POLARITY, pin, 0);
+ break;
+ default:
+ rk_gpio_write_bit(sc, RK_GPIO_INTMASK, pin, 1);
+ rk_gpio_write_bit(sc, RK_GPIO_INTEN, pin, 0);
+ RK_GPIO_UNLOCK(sc);
+ return (EINVAL);
+ }
+ rk_gpio_write_bit(sc, RK_GPIO_DEBOUNCE, pin, 1);
+ rk_gpio_write_bit(sc, RK_GPIO_INTMASK, pin, 0);
+ rk_gpio_write_bit(sc, RK_GPIO_INTEN, pin, 1);
+ RK_GPIO_UNLOCK(sc);
+
+ return (0);
+}
+
+static int
+rk_pic_teardown_intr(device_t dev, struct intr_irqsrc *isrc,
+ struct resource *res, struct intr_map_data *data)
+{
+ struct rk_gpio_softc *sc = device_get_softc(dev);
+ struct rk_pin_irqsrc *irqsrc;
+
+ irqsrc = (struct rk_pin_irqsrc *)isrc;
+
+ if (isrc->isrc_handlers == 0) {
+ irqsrc->mode = GPIO_INTR_CONFORM;
+ RK_GPIO_LOCK(sc);
+ rk_gpio_write_bit(sc, RK_GPIO_INTEN, irqsrc->irq, 0);
+ rk_gpio_write_bit(sc, RK_GPIO_INTMASK, irqsrc->irq, 0);
+ rk_gpio_write_bit(sc, RK_GPIO_DEBOUNCE, irqsrc->irq, 0);
+ RK_GPIO_UNLOCK(sc);
+ }
+ return (0);
+}
+
static device_method_t rk_gpio_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, rk_gpio_probe),
@@ -569,6 +789,11 @@ static device_method_t rk_gpio_methods[] = {
DEVMETHOD(gpio_pin_config_32, rk_gpio_pin_config_32),
DEVMETHOD(gpio_map_gpios, rk_gpio_map_gpios),
+ /* Interrupt controller interface */
+ DEVMETHOD(pic_map_intr, rk_pic_map_intr),
+ DEVMETHOD(pic_setup_intr, rk_pic_setup_intr),
+ DEVMETHOD(pic_teardown_intr, rk_pic_teardown_intr),
+
/* ofw_bus interface */
DEVMETHOD(ofw_bus_get_node, rk_gpio_get_node),