rockchip: gpio: add gpio_input_irq & gpio_irq_status

BUG=b:35647967
TEST=boot from bob

Change-Id: I5de902ab26fe768b641f69d85a5294baf6d916e3
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 223257d486b026c06a1f3a7a830b829efb9932dc
Original-Change-Id: I055ad5f59285cee3110d1e7cb1a53a60144712e4
Original-Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/452285
Original-Commit-Ready: Caesar Wang <wxt@rock-chips.com>
Original-Tested-by: Caesar Wang <wxt@rock-chips.com>
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/19433
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

2 files changed, 56 insertions, 0 deletions

diff --git a/src/soc/rockchip/common/gpio.c b/src/soc/rockchip/common/gpio.c
index 1ff0bc9012..0c19f514a7 100644
--- a/src/soc/rockchip/common/gpio.c
+++ b/src/soc/rockchip/common/gpio.c
@@ -56,6 +56,49 @@ void gpio_input_pullup(gpio_t gpio)
 	gpio_set_dir(gpio, GPIO_INPUT);
 }
 
+void gpio_input_irq(gpio_t gpio, enum gpio_irq_type type)
+{
+	uint32_t int_polarity, inttype_level;
+	uint32_t mask = BIT(gpio.num);
+
+	gpio_input(gpio);
+
+	int_polarity = inttype_level = 0;
+	switch (type) {
+		case IRQ_TYPE_EDGE_RISING:
+			int_polarity = mask;
+			inttype_level = mask;
+			break;
+		case IRQ_TYPE_EDGE_FALLING:
+			inttype_level = mask;
+			break;
+		case IRQ_TYPE_LEVEL_HIGH:
+			int_polarity = mask;
+			break;
+		case IRQ_TYPE_LEVEL_LOW:
+			break;
+	}
+	clrsetbits_le32(&gpio_port[gpio.port]->int_polarity,
+			mask, int_polarity);
+	clrsetbits_le32(&gpio_port[gpio.port]->inttype_level,
+			mask, inttype_level);
+
+	setbits_le32(&gpio_port[gpio.port]->inten, mask);
+	clrbits_le32(&gpio_port[gpio.port]->intmask, mask);
+}
+
+int gpio_irq_status(gpio_t gpio)
+{
+	uint32_t mask = BIT(gpio.num);
+	uint32_t int_status = read32(&gpio_port[gpio.port]->int_status);
+
+	if (!(int_status & mask))
+		return 0;
+
+	setbits_le32(&gpio_port[gpio.port]->porta_eoi, mask);
+	return 1;
+}
+
 int gpio_get(gpio_t gpio)
 {
 	return (read32(&gpio_port[gpio.port]->ext_porta) >> gpio.num) & 0x1;
diff --git a/src/soc/rockchip/common/include/soc/gpio.h b/src/soc/rockchip/common/include/soc/gpio.h
index a888635f72..4c1cfa03cf 100644
--- a/src/soc/rockchip/common/include/soc/gpio.h
+++ b/src/soc/rockchip/common/include/soc/gpio.h
@@ -84,6 +84,19 @@ enum gpio_dir {
 	GPIO_OUTPUT = 1,
 };
 
+enum gpio_irq_type {
+	IRQ_TYPE_EDGE_RISING = 0,
+	IRQ_TYPE_EDGE_FALLING,
+	IRQ_TYPE_LEVEL_HIGH,
+	IRQ_TYPE_LEVEL_LOW,
+};
+
+/* Setup and enable irq */
+void gpio_input_irq(gpio_t gpio, enum gpio_irq_type);
+
+/* Check and clear irq status */
+int gpio_irq_status(gpio_t gpio);
+
 /* The gpio pull bias setting may be different between SoCs */
 u32 gpio_get_pull_val(gpio_t gpio, enum gpio_pull pull);