linux-kernel - [PATCH 8/9] usb: typec: Add definitions for Thunderbolt 3 Alternate Mode

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Message-Id: <20200213132428.53374-9-heikki.krogerus@linux.intel.com>
Date:   Thu, 13 Feb 2020 16:24:27 +0300
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Benson Leung <bleung@...omium.org>,
        Prashant Malani <pmalani@...omium.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: [PATCH 8/9] usb: typec: Add definitions for Thunderbolt 3 Alternate Mode

This adds separate header file for the Thunderbolt 3
Alternate Mode (aka. TBT). The header supplies definitions for
all the Thunderbolt specific VDOs (Vendor Defined Objects)
that are described in the USB Type-C Connector specification
v2.0, as well as definition for the Thunderbolt 3 Standard
ID (SID).

There is also a new connector state value for the
Thunderbolt 3 Alternate Mode that can be used with the mux
drivers.

Signed-off-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
---
 include/linux/usb/typec_tbt.h | 53 +++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 include/linux/usb/typec_tbt.h

diff --git a/include/linux/usb/typec_tbt.h b/include/linux/usb/typec_tbt.h
new file mode 100644
index 000000000000..47c2d501ddce
--- /dev/null
+++ b/include/linux/usb/typec_tbt.h
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __USB_TYPEC_TBT_H
+#define __USB_TYPEC_TBT_H
+
+#include <linux/usb/typec_altmode.h>
+
+#define USB_TYPEC_VENDOR_INTEL		0x8087
+/* Alias for convenience */
+#define USB_TYPEC_TBT_SID		USB_TYPEC_VENDOR_INTEL
+
+/* Connector state for Thunderbolt3 */
+#define TYPEC_TBT_MODE			TYPEC_STATE_MODAL
+
+/**
+ * struct typec_thunderbolt_data - Thundebolt3 Alt Mode specific data
+ * @device_mode: Device Discover Mode VDO
+ * @cable_mode: Cable Discover Mode VDO
+ * @enter_vdo: Enter Mode VDO
+ */
+struct typec_thunderbolt_data {
+	u32 device_mode;
+	u32 cable_mode;
+	u32 enter_vdo;
+};
+
+/* TBT3 Device Discover Mode VDO bits */
+#define TBT_MODE			BIT(0)
+#define TBT_ADAPTER(_vdo_)		(((_vdo_) & BIT(16)) >> 16)
+#define   TBT_ADAPTER_LEGACY		0
+#define   TBT_ADAPTER_TBT3		1
+#define TBT_INTEL_SPECIFIC_B0		BIT(26)
+#define TBT_VENDOR_SPECIFIC_B0		BIT(30)
+#define TBT_VENDOR_SPECIFIC_B1		BIT(31)
+
+#define TBT_SET_ADAPTER(a)		(((a) & 1) << 16)
+
+/* TBT3 Cable Discover Mode VDO bits */
+#define TBT_CABLE_SPEED(_vdo_)		(((_vdo_) & GENMASK(18, 16)) >> 16)
+#define   TBT_CABLE_USB3_GEN1		1
+#define   TBT_CABLE_USB3_PASSIVE	2
+#define   TBT_CABLE_10_AND_20GBPS	3
+#define TBT_CABLE_ROUNDED		BIT(19)
+#define TBT_CABLE_OPTICAL		BIT(21)
+#define TBT_CABLE_RETIMER		BIT(22)
+#define TBT_CABLE_LINK_TRAINING		BIT(23)
+
+#define TBT_SET_CABLE_SPEED(_s_)	(((_s_) & GENMASK(2, 0)) << 16)
+
+/* TBT3 Device Enter Mode VDO bits */
+#define TBT_ENTER_MODE_CABLE_SPEED(s)	TBT_SET_CABLE_SPEED(s)
+#define TBT_ENTER_MODE_ACTIVE_CABLE	BIT(24)
+
+#endif /* __USB_TYPEC_TBT_H */
-- 
2.25.0