1 files changed, 79 insertions, 0 deletions
diff --git a/src/drivers/gpio/dwgpio.h b/src/drivers/gpio/dwgpio.h
new file mode 100644
index 000000000..cee97a6ab
--- /dev/null
+++ b/src/drivers/gpio/dwgpio.h
@@ -0,0 +1,79 @@
+#ifndef _DWGPIO_H
+#define _DWGPIO_H
+
+/** @file
+ *
+ * Synopsys DesignWare GPIO driver
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+/** Maximum number of GPIOs per port */
+#define DWGPIO_MAX_COUNT 32
+
+/** Software port
+ *
+ * This is the register bank containing the DR, DDR, and CTL bits.
+ */
+#define DWGPIO_SWPORT( x ) ( 0x00 + ( (x) * 0x0c ) )
+
+/** Data register
+ *
+ * Bits written to this register are output if the corresponding DDR
+ * bit is set to 1 (output) and the corresponding CTL bit is set to 0
+ * (software control).
+ *
+ * Bits read from this register reflect the most recently written
+ * value, and do not reflect the actual status of the GPIO pin.
+ */
+#define DWGPIO_SWPORT_DR 0x00
+
+/** Data direction register
+ *
+ * The GPIO is an output if the corresponding bit in this register is
+ * set to 1.
+ */
+#define DWGPIO_SWPORT_DDR 0x04
+
+/** Control register
+ *
+ * The GPIO is under software control (i.e. is functioning as a GPIO,
+ * rather than being controlled by a separate functional block) if the
+ * corresponding bit in this register is set to 0.
+ */
+#define DWGPIO_SWPORT_CTL 0x08
+
+/** External port
+ *
+ * Bits read from this register reflect the current status of the GPIO
+ * pin.
+ */
+#define DWGPIO_EXT_PORT( x ) ( 0x50 + ( (x) * 0x04 ) )
+
+/** A DesignWare GPIO port group */
+struct dwgpio_group {
+	/** Registers */
+	void *regs;
+};
+
+/** A DesignWare GPIO port */
+struct dwgpio {
+	/** Device name */
+	const char *name;
+	/** Port index */
+	unsigned int port;
+	/** Software port registers */
+	void *swport;
+	/** External port register */
+	void *ext;
+
+	/** Original data register value */
+	uint32_t dr;
+	/** Original data direction register value */
+	uint32_t ddr;
+	/** Original control register value */
+	uint32_t ctl;
+};
+
+#endif /* _DWGPIO_H */