1 files changed, 104 insertions, 0 deletions

diff --git a/mtp/ffs/MtpDescriptors.h b/mtp/ffs/MtpDescriptors.h
new file mode 100644
index 000000000..f362d80f4
--- /dev/null
+++ b/mtp/ffs/MtpDescriptors.h
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *		http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MTP_DESCRIPTORS_H
+#define MTP_DESCRIPTORS_H
+
+#include <linux/usb/ch9.h>
+#include <linux/usb/functionfs.h>
+#include <sys/endian.h>
+
+constexpr char FFS_MTP_EP0[] = "/dev/usb-ffs/mtp/ep0";
+constexpr char FFS_MTP_EP_IN[] = "/dev/usb-ffs/mtp/ep1";
+constexpr char FFS_MTP_EP_OUT[] = "/dev/usb-ffs/mtp/ep2";
+constexpr char FFS_MTP_EP_INTR[] = "/dev/usb-ffs/mtp/ep3";
+
+constexpr char FFS_PTP_EP0[] = "/dev/usb-ffs/ptp/ep0";
+constexpr char FFS_PTP_EP_IN[] = "/dev/usb-ffs/ptp/ep1";
+constexpr char FFS_PTP_EP_OUT[] = "/dev/usb-ffs/ptp/ep2";
+constexpr char FFS_PTP_EP_INTR[] = "/dev/usb-ffs/ptp/ep3";
+
+constexpr int MAX_PACKET_SIZE_FS = 64;
+constexpr int MAX_PACKET_SIZE_HS = 512;
+constexpr int MAX_PACKET_SIZE_SS = 1024;
+constexpr int MAX_PACKET_SIZE_EV = 28;
+
+struct func_desc {
+	struct usb_interface_descriptor intf;
+	struct usb_endpoint_descriptor_no_audio sink;
+	struct usb_endpoint_descriptor_no_audio source;
+	struct usb_endpoint_descriptor_no_audio intr;
+} __attribute__((packed));
+
+struct ss_func_desc {
+	struct usb_interface_descriptor intf;
+	struct usb_endpoint_descriptor_no_audio sink;
+	struct usb_ss_ep_comp_descriptor sink_comp;
+	struct usb_endpoint_descriptor_no_audio source;
+	struct usb_ss_ep_comp_descriptor source_comp;
+	struct usb_endpoint_descriptor_no_audio intr;
+	struct usb_ss_ep_comp_descriptor intr_comp;
+} __attribute__((packed));
+
+struct desc_v1 {
+	struct usb_functionfs_descs_head_v1 {
+		__le32 magic;
+		__le32 length;
+		__le32 fs_count;
+		__le32 hs_count;
+	} __attribute__((packed)) header;
+	struct func_desc fs_descs, hs_descs;
+} __attribute__((packed));
+
+struct desc_v2 {
+	struct usb_functionfs_descs_head_v2 header;
+	// The rest of the structure depends on the flags in the header.
+	__le32 fs_count;
+	__le32 hs_count;
+	__le32 ss_count;
+	__le32 os_count;
+	struct func_desc fs_descs, hs_descs;
+	struct ss_func_desc ss_descs;
+	struct usb_os_desc_header os_header;
+	struct usb_ext_compat_desc os_desc;
+} __attribute__((packed));
+
+// OS descriptor contents should not be changed. See b/64790536.
+static_assert(sizeof(struct desc_v2) == sizeof(usb_functionfs_descs_head_v2) +
+		16 + 2 * sizeof(struct func_desc) + sizeof(struct ss_func_desc) +
+		sizeof(usb_os_desc_header) + sizeof(usb_ext_compat_desc),
+		"Size of mtp descriptor is incorrect!");
+
+#define STR_INTERFACE "MTP"
+struct functionfs_lang {
+	__le16 code;
+	char str1[sizeof(STR_INTERFACE)];
+} __attribute__((packed));
+
+struct functionfs_strings {
+	struct usb_functionfs_strings_head header;
+	struct functionfs_lang lang0;
+} __attribute__((packed));
+
+extern const struct desc_v2 mtp_desc_v2;
+extern const struct desc_v2 ptp_desc_v2;
+extern const struct desc_v1 mtp_desc_v1;
+extern const struct desc_v1 ptp_desc_v1;
+extern const struct functionfs_strings mtp_strings;
+
+bool writeDescriptors(int fd, bool ptp);
+
+#endif // MTP_DESCRIPTORS_H