[WIP] ec/system76/ec: Implement usbc_get_ops

Change-Id: Icee0661ec0d0c949b73503e639dd8a461c05235a
Signed-off-by: Tim Crawford <tcrawford@system76.com>

Author: crawfxrd

src/ec/system76/ec/Makefile.inc

@@ -5,6 +5,7 @@ all-y += system76_ec.c
 
 ramstage-y += smbios.c
 ramstage-$(CONFIG_EC_SYSTEM76_EC_LOCKDOWN) += lockdown.c
+ramstage-y += usbc_mux.c
 
 smm-$(CONFIG_DEBUG_SMI) += system76_ec.c
 

src/ec/system76/ec/usbc_mux.c

@@ -0,0 +1,64 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <delay.h>
+#include <device/usbc_mux.h>
+#include <intelblocks/tcss.h>
+
+static int system76_ec_get_mux_info(int port, struct usbc_mux_info *info)
+{
+	if (!info)
+		return -1;
+
+	// TODO: Get actual TBT port info
+	info->dp = true;
+	info->usb = true;
+	// Initialize everything else to 0.
+	info->cable = false;
+	info->polarity = false;
+	info->hpd_lvl = false;
+	info->hpd_irq = false;
+	info->ufp = false;
+	info->dbg_acc = false;
+	// XXX: Mode E and F for USB Type-C to DisplayPort
+	info->dp_pin_mode = MODE_DP_PIN_E;
+
+	return 0;
+}
+
+static int system76_ec_wait_for_connection(long timeout_ms)
+{
+	mdelay(50);
+	return 1;
+}
+
+static int system76_ec_enter_dp_mode(int port)
+{
+	return 0;
+}
+
+static int system76_ec_wait_for_dp_mode_entry(int port, long timeout_ms)
+{
+	return 0;
+}
+
+static int system76_ec_wait_for_hpd(int port, long timeout_ms)
+{
+	return 0;
+}
+
+static const struct usbc_ops system76_ec_usbc_ops = {
+	.mux_ops = {
+		.get_mux_info = system76_ec_get_mux_info,
+	},
+	.dp_ops = {
+		.wait_for_connection = system76_ec_wait_for_connection,
+		.enter_dp_mode = system76_ec_enter_dp_mode,
+		.wait_for_dp_mode_entry = system76_ec_wait_for_dp_mode_entry,
+		.wait_for_hpd = system76_ec_wait_for_hpd,
+	},
+};
+
+const struct usbc_ops *usbc_get_ops(void)
+{
+	return &system76_ec_usbc_ops;
+}