include/device: Generic interface for USB-C mux operations

Create a generic interface to allow any of the EC or other drivers
to provide set of USB-C mux operations.

Signed-off-by: Derek Huang <derek.huang@intel.corp-partner.google.com>
Change-Id: Ic5435f2054d1c9f114b06c3b4643e34713290e0d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58002
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/include/device/usbc_mux.h

@@ -0,0 +1,69 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/* struct to hold all USB-C mux related variables */
+struct usbc_mux_info {
+	bool dp; /* DP connected */
+	bool usb; /* USB connected */
+	bool cable; /* 0 = Passive cable, 1 = Active cable */
+	bool polarity; /* Polarity of connected device. 0 = Normal, 1 = Flipped */
+	bool hpd_lvl; /* HPD Level assert */
+	bool hpd_irq; /* HPD IRQ assert */
+	bool ufp; /* 0 = DFP, 1 = UFP */
+	bool dbg_acc; /* Debug Accessory. 0 = Disable, 1 = Enable */
+	uint8_t dp_pin_mode; /* DP pin assignments
+				0h: Reserved.
+				1h: Pin Assignment A.
+				2h: Pin Assignment B.
+				3h: Pin Assignment C.
+				4h: Pin Assignment D.
+				5h: Pin Assignment E.
+				6h: Pin Assignment F.
+				7-Fh: Reserved. */
+};
+struct usbc_mux_ops {
+	/*
+	 * Get mux information on a given port.
+	 *
+	 * Return value:
+	 * -1 = error
+	 *  0 = success
+	 */
+	 int (*get_mux_info)(int port, struct usbc_mux_info *info);
+};
+
+struct usbc_dp_ops {
+	/*
+	 * Wait up to `timeout_ms` for DP connection to be ready on any available port.
+	 *
+	 * Return value:
+	 * -1 = error
+	 *  0 = no DP connection
+	 * <bit mask> = mask for ports that are ready in DP mode.
+	 */
+	int (*wait_for_connection)(long timeout_ms);
+
+	/*
+	 * Enter DP mode on a given `port`.
+	 *
+	 * Return value:
+	 * -1 = error
+	 *  0 = success
+	 */
+	int (*enter_dp_mode)(int port);
+
+	/*
+	 * Wait up to `timeout_ms` for HPD on a given port.
+	 *
+	 * Return value:
+	 * -1 = timeout
+	 *  0 = success
+	 */
+	int (*wait_for_hpd)(int port, long timeout_ms);
+};
+
+struct usbc_ops {
+	struct usbc_mux_ops mux_ops;
+	struct usbc_dp_ops dp_ops;
+};
+
+const struct usbc_ops *usbc_get_ops(void);