From 42996d6b1ce93ad22367211e13c417cd49337fe5 Mon Sep 17 00:00:00 2001
From: Christoph Haag <christoph.haag@collabora.com>
Date: Fri, 12 Feb 2021 02:44:00 +0100
Subject: [PATCH] os/hid: Add get_physical_address()

---
 src/xrt/auxiliary/os/os_hid.h        | 17 +++++++++++++++++
 src/xrt/auxiliary/os/os_hid_hidraw.c |  8 ++++++++
 2 files changed, 25 insertions(+)

diff --git a/src/xrt/auxiliary/os/os_hid.h b/src/xrt/auxiliary/os/os_hid.h
index 89fde6216..146463c09 100644
--- a/src/xrt/auxiliary/os/os_hid.h
+++ b/src/xrt/auxiliary/os/os_hid.h
@@ -37,6 +37,8 @@ struct os_hid_device
 
 	int (*set_feature)(struct os_hid_device *hid_dev, const uint8_t *data, size_t size);
 
+	int (*get_physical_address)(struct os_hid_device *hid_dev, uint8_t *data, size_t size);
+
 	void (*destroy)(struct os_hid_device *hid_dev);
 };
 
@@ -104,6 +106,21 @@ os_hid_set_feature(struct os_hid_device *hid_dev, const uint8_t *data, size_t si
 	return hid_dev->set_feature(hid_dev, data, size);
 }
 
+/*!
+ * Get the physical address.
+ *
+ * For USB devices, the string contains the physical path to the device (the
+ * USB controller, hubs, ports, etc).  For Bluetooth *devices, the string
+ * contains the hardware (MAC) address of the device.
+ *
+ * @public @memberof os_hid_device
+ */
+static inline int
+os_hid_get_physical_address(struct os_hid_device *hid_dev, uint8_t *data, size_t size)
+{
+	return hid_dev->get_physical_address(hid_dev, data, size);
+}
+
 /*!
  * Close and free the given device.
  *
diff --git a/src/xrt/auxiliary/os/os_hid_hidraw.c b/src/xrt/auxiliary/os/os_hid_hidraw.c
index ca95b3d2a..56c6e3b3e 100644
--- a/src/xrt/auxiliary/os/os_hid_hidraw.c
+++ b/src/xrt/auxiliary/os/os_hid_hidraw.c
@@ -89,6 +89,13 @@ os_hidraw_get_feature(struct os_hid_device *ohdev, uint8_t report_num, uint8_t *
 	return ioctl(hrdev->fd, HIDIOCGFEATURE(length), data);
 }
 
+static int
+os_hidraw_get_physical_address(struct os_hid_device *ohdev, uint8_t *data, size_t length)
+{
+	struct hid_hidraw *hrdev = (struct hid_hidraw *)ohdev;
+	return ioctl(hrdev->fd, HIDIOCGRAWPHYS(length), data);
+}
+
 static int
 os_hidraw_get_feature_timeout(struct os_hid_device *ohdev, void *data, size_t length, uint32_t timeout)
 {
@@ -138,6 +145,7 @@ os_hid_open_hidraw(const char *path, struct os_hid_device **out_hid)
 	hrdev->base.get_feature = os_hidraw_get_feature;
 	hrdev->base.get_feature_timeout = os_hidraw_get_feature_timeout;
 	hrdev->base.set_feature = os_hidraw_set_feature;
+	hrdev->base.get_physical_address = os_hidraw_get_physical_address;
 	hrdev->base.destroy = os_hidraw_destroy;
 	hrdev->fd = open(path, O_RDWR);
 	if (hrdev->fd < 0) {