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trezor-firmware/embed/trezorhal/usb_hid-defs.h
Pavol Rusnak 5e93cca0a9
WIP
2017-12-16 17:54:12 +01:00

81 lines
3.0 KiB
C

/*
* Copyright (c) Jan Pochyla, SatoshiLabs
*
* Licensed under TREZOR License
* see LICENSE file for details
*/
typedef struct __attribute__((packed)) {
uint8_t bLength;
uint8_t bDescriptorType;
uint16_t bcdHID;
uint8_t bCountryCode;
uint8_t bNumDescriptors;
uint8_t bReportDescriptorType;
uint16_t wReportDescriptorLength;
} usb_hid_descriptor_t;
typedef struct __attribute__((packed)) {
usb_interface_descriptor_t iface;
usb_hid_descriptor_t hid;
usb_endpoint_descriptor_t ep_in;
usb_endpoint_descriptor_t ep_out;
} usb_hid_descriptor_block_t;
typedef enum {
USB_HID_SUBCLASS_NONE = 0,
USB_HID_SUBCLASS_BOOT = 1,
} usb_hid_subclass_t;
typedef enum {
USB_HID_PROTOCOL_NONE = 0,
USB_HID_PROTOCOL_KEYBOARD = 1,
USB_HID_PROTOCOL_MOUSE = 2,
} usb_hid_protocol_t;
/* usb_hid_info_t contains all information for setting up a HID interface. All
* passed pointers need to live at least until the interface is disabled
* (usb_stop is called). */
typedef struct {
const uint8_t *report_desc; // With length of report_desc_len bytes
uint8_t *rx_buffer; // With length of max_packet_len bytes
uint8_t iface_num; // Address of this HID interface
uint8_t ep_in; // Address of IN endpoint (with the highest bit set)
uint8_t ep_out; // Address of OUT endpoint
uint8_t subclass; // usb_iface_subclass_t
uint8_t protocol; // usb_iface_protocol_t
uint8_t polling_interval; // In units of 1ms
uint8_t max_packet_len; // Length of the biggest report and of rx_buffer
uint8_t report_desc_len; // Length of report_desc
} usb_hid_info_t;
/* usb_hid_state_t encapsulates all state used by enabled HID interface. It
* needs to be completely initialized in usb_hid_add and reset in
* usb_hid_class_init. See usb_hid_info_t for details of the configuration
* fields. */
typedef struct {
const usb_hid_descriptor_block_t *desc_block;
const uint8_t *report_desc;
uint8_t *rx_buffer;
uint8_t ep_in;
uint8_t ep_out;
uint8_t max_packet_len;
uint8_t report_desc_len;
uint8_t protocol; // For SET_PROTOCOL/GET_PROTOCOL setup reqs
uint8_t idle_rate; // For SET_IDLE/GET_IDLE setup reqs
uint8_t alt_setting; // For SET_INTERFACE/GET_INTERFACE setup reqs
uint8_t last_read_len; // Length of data read into rx_buffer
uint8_t ep_in_is_idle; // Set to 1 after IN endpoint gets idle
} usb_hid_state_t;
secbool __wur usb_hid_add(const usb_hid_info_t *hid_info);
secbool __wur usb_hid_can_read(uint8_t iface_num);
secbool __wur usb_hid_can_write(uint8_t iface_num);
int __wur usb_hid_read(uint8_t iface_num, uint8_t *buf, uint32_t len);
int __wur usb_hid_write(uint8_t iface_num, const uint8_t *buf, uint32_t len);
int __wur usb_hid_read_select(uint32_t timeout);
int __wur usb_hid_read_blocking(uint8_t iface_num, uint8_t *buf, uint32_t len, int timeout);
int __wur usb_hid_write_blocking(uint8_t iface_num, const uint8_t *buf, uint32_t len, int timeout);