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