1 files changed, 113 insertions, 0 deletions
diff --git a/roms/u-boot/drivers/gpio/cortina_gpio.c b/roms/u-boot/drivers/gpio/cortina_gpio.c
new file mode 100644
index 000000000..72ef523be
--- /dev/null
+++ b/roms/u-boot/drivers/gpio/cortina_gpio.c
@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020 Cortina-Access
+ *
+ * GPIO Driver for Cortina Access CAxxxx Line of SoCs
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <log.h>
+#include <asm/io.h>
+#include <asm/gpio.h>
+#include <linux/bitops.h>
+#include <linux/compat.h>
+#include <linux/compiler.h>
+
+/* GPIO Register Map */
+#define CORTINA_GPIO_CFG	0x00
+#define CORTINA_GPIO_OUT	0x04
+#define CORTINA_GPIO_IN		0x08
+#define CORTINA_GPIO_LVL	0x0C
+#define CORTINA_GPIO_EDGE	0x10
+#define CORTINA_GPIO_BOTHEDGE	0x14
+#define CORTINA_GPIO_IE		0x18
+#define CORTINA_GPIO_INT	0x1C
+#define CORTINA_GPIO_STAT	0x20
+
+struct cortina_gpio_bank {
+	void __iomem *base;
+};
+
+#ifdef CONFIG_DM_GPIO
+static int ca_gpio_direction_input(struct udevice *dev, unsigned int offset)
+{
+	struct cortina_gpio_bank *priv = dev_get_priv(dev);
+
+	setbits_32(priv->base, BIT(offset));
+	return 0;
+}
+
+static int
+ca_gpio_direction_output(struct udevice *dev, unsigned int offset, int value)
+{
+	struct cortina_gpio_bank *priv = dev_get_priv(dev);
+
+	clrbits_32(priv->base, BIT(offset));
+	return 0;
+}
+
+static int ca_gpio_get_value(struct udevice *dev, unsigned int offset)
+{
+	struct cortina_gpio_bank *priv = dev_get_priv(dev);
+
+	return readl(priv->base + CORTINA_GPIO_IN) & BIT(offset);
+}
+
+static int ca_gpio_set_value(struct udevice *dev, unsigned int offset,
+			     int value)
+{
+	struct cortina_gpio_bank *priv = dev_get_priv(dev);
+
+	setbits_32(priv->base + CORTINA_GPIO_OUT, BIT(offset));
+	return 0;
+}
+
+static int ca_gpio_get_function(struct udevice *dev, unsigned int offset)
+{
+	struct cortina_gpio_bank *priv = dev_get_priv(dev);
+
+	if (readl(priv->base) & BIT(offset))
+		return GPIOF_INPUT;
+	else
+		return GPIOF_OUTPUT;
+}
+
+static const struct dm_gpio_ops gpio_cortina_ops = {
+	.direction_input = ca_gpio_direction_input,
+	.direction_output = ca_gpio_direction_output,
+	.get_value = ca_gpio_get_value,
+	.set_value = ca_gpio_set_value,
+	.get_function = ca_gpio_get_function,
+};
+
+static int ca_gpio_probe(struct udevice *dev)
+{
+	struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+	struct cortina_gpio_bank *priv = dev_get_priv(dev);
+
+	priv->base = dev_remap_addr_index(dev, 0);
+	if (!priv->base)
+		return -EINVAL;
+
+	uc_priv->gpio_count = dev_read_u32_default(dev, "ngpios", 32);
+	uc_priv->bank_name = dev->name;
+
+	debug("Done Cortina GPIO init\n");
+	return 0;
+}
+
+static const struct udevice_id ca_gpio_ids[] = {
+	{.compatible = "cortina,ca-gpio"},
+	{}
+};
+
+U_BOOT_DRIVER(cortina_gpio) = {
+	.name = "cortina-gpio",
+	.id = UCLASS_GPIO,
+	.ops = &gpio_cortina_ops,
+	.probe = ca_gpio_probe,
+	.priv_auto	= sizeof(struct cortina_gpio_bank),
+	.of_match = ca_gpio_ids,
+};
+#endif /* CONFIG_DM_GPIO */