177 lines
4.1 KiB
C
177 lines
4.1 KiB
C
/*
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* CAMTP Responder
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* Copyright (c) 2020 Holdtecs Technologies
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*
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* CAMTP Responder is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 3.0 of the License, or (at your option) any later version.
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*
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* CAMTP Responder is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License version 3 for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with CAMTP Responder; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file usb_gadget.c
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* @brief USB gadget layer
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* @author ***
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*/
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#ifndef _INC_USB_GADGET_H_
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#define _INC_USB_GADGET_H_
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#include <linux/usb/ch9.h>
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#include <linux/usb/gadgetfs.h>
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#include <linux/usb/functionfs.h>
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#include "usbstring.h"
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enum
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{
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EP_DESCRIPTOR_IN = 0,
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EP_DESCRIPTOR_OUT,
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EP_DESCRIPTOR_INT_IN,
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EP_NB_OF_DESCRIPTORS
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};
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#define EP_INT_MODE 0x00000000
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#define EP_BULK_MODE 0x00000001
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#define EP_IN_DIR 0x00000000
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#define EP_OUT_DIR 0x00000002
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#define EP_HS_MODE 0x00000004
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#define EP_SS_MODE 0x00000008
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typedef struct _EndPointsDesc {
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struct usb_interface_descriptor if_desc;
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struct usb_endpoint_descriptor_no_audio ep_desc_in;
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struct usb_endpoint_descriptor_no_audio ep_desc_out;
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struct usb_endpoint_descriptor_no_audio ep_desc_int_in;
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} __attribute__((packed)) EndPointsDesc;
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typedef struct _SSEndPointsDesc {
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struct usb_interface_descriptor if_desc;
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struct usb_endpoint_descriptor_no_audio ep_desc_in;
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struct usb_ss_ep_comp_descriptor ep_desc_in_comp;
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struct usb_endpoint_descriptor_no_audio ep_desc_out;
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struct usb_ss_ep_comp_descriptor ep_desc_out_comp;
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struct usb_endpoint_descriptor_no_audio ep_desc_int_in;
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struct usb_ss_ep_comp_descriptor ep_desc_int_in_comp;
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} __attribute__((packed)) SSEndPointsDesc;
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typedef struct ep_cfg_descriptor {
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struct usb_endpoint_descriptor_no_audio ep_desc;
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#ifdef CONFIG_USB_SS_SUPPORT
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struct usb_ss_ep_comp_descriptor ep_desc_comp;
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#endif
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} __attribute__((packed)) ep_cfg_descriptor;
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// Direct GadgetFS mode
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typedef struct _usb_cfg
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{
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uint32_t head;
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#if CONFIG_USB_FS_SUPPORT
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struct usb_config_descriptor cfg_fs;
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EndPointsDesc ep_desc_fs;
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#endif
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#if CONFIG_USB_HS_SUPPORT
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struct usb_config_descriptor cfg_hs;
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EndPointsDesc ep_desc_hs;
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#endif
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#if CONFIG_USB_SS_SUPPORT
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struct usb_config_descriptor cfg_ss;
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SSEndPointsDesc ep_desc_ss;
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#endif
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struct usb_device_descriptor dev_desc;
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} __attribute__ ((packed)) usb_cfg;
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// FunctionFS mode
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typedef struct _usb_ffs_cfg
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{
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uint32_t magic;
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uint32_t length;
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#ifndef OLD_FUNCTIONFS_DESCRIPTORS // Kernel > v3.14
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uint32_t flags;
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#endif
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#ifdef CONFIG_USB_FS_SUPPORT
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uint32_t fs_count;
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#endif
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#ifdef CONFIG_USB_HS_SUPPORT
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uint32_t hs_count;
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#endif
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#if defined(CONFIG_USB_SS_SUPPORT) && !defined(OLD_FUNCTIONFS_DESCRIPTORS)
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uint32_t ss_count;
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#endif
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#ifdef CONFIG_USB_FS_SUPPORT
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EndPointsDesc ep_desc_fs;
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#endif
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#ifdef CONFIG_USB_HS_SUPPORT
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EndPointsDesc ep_desc_hs;
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#endif
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#if defined(CONFIG_USB_SS_SUPPORT) && !defined(OLD_FUNCTIONFS_DESCRIPTORS)
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SSEndPointsDesc ep_desc_ss;
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#endif
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} __attribute__ ((packed)) usb_ffs_cfg;
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typedef struct _ffs_strings
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{
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struct usb_functionfs_strings_head header;
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uint16_t code;
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char string_data[128]; // string data.
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} __attribute__((packed)) ffs_strings;
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typedef struct _ep_cfg
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{
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uint32_t head;
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ep_cfg_descriptor ep_desc[2];
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} __attribute__ ((packed)) ep_cfg;
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enum {
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STRINGID_MANUFACTURER = 1,
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STRINGID_PRODUCT,
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STRINGID_SERIAL,
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STRINGID_CONFIG_HS,
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STRINGID_CONFIG_LS,
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STRINGID_INTERFACE,
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STRINGID_MAX
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};
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#define MAX_USB_STRING 16
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typedef struct _usb_gadget
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{
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int usb_device;
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int ep_handles[EP_NB_OF_DESCRIPTORS];
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usb_cfg *usb_config;
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usb_ffs_cfg *usb_ffs_config;
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ep_cfg *ep_config[EP_NB_OF_DESCRIPTORS];
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char *ep_path[EP_NB_OF_DESCRIPTORS];
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struct usb_string stringtab[MAX_USB_STRING];
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}usb_gadget;
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#endif
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