56 lines
2.3 KiB
C
56 lines
2.3 KiB
C
/*
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* Copyright (c) Jan Pochyla, SatoshiLabs
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*
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* Licensed under TREZOR License
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* see LICENSE file for details
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*/
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#define USB_WEBUSB_VENDOR_CODE 0x01 // arbitrary
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#define USB_WEBUSB_LANDING_PAGE 0x01 // arbitrary
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typedef struct __attribute__((packed)) {
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usb_interface_descriptor_t iface;
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usb_endpoint_descriptor_t ep_in;
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usb_endpoint_descriptor_t ep_out;
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} usb_webusb_descriptor_block_t;
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/* usb_webusb_info_t contains all information for setting up a WebUSB interface. All
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* passed pointers need to live at least until the interface is disabled
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* (usb_stop is called). */
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typedef struct {
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uint8_t *rx_buffer; // With length of max_packet_len bytes
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uint8_t iface_num; // Address of this WebUSB interface
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uint8_t ep_in; // Address of IN endpoint (with the highest bit set)
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uint8_t ep_out; // Address of OUT endpoint
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uint8_t subclass; // usb_iface_subclass_t
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uint8_t protocol; // usb_iface_protocol_t
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uint8_t polling_interval; // In units of 1ms
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uint8_t max_packet_len; // Length of the biggest report and of rx_buffer
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} usb_webusb_info_t;
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/* usb_webusb_state_t encapsulates all state used by enabled WebUSB interface. It
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* needs to be completely initialized in usb_webusb_add and reset in
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* usb_webusb_class_init. See usb_webusb_info_t for details of the configuration
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* fields. */
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typedef struct {
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const usb_webusb_descriptor_block_t *desc_block;
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uint8_t *rx_buffer;
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uint8_t ep_in;
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uint8_t ep_out;
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uint8_t max_packet_len;
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uint8_t alt_setting; // For SET_INTERFACE/GET_INTERFACE setup reqs
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uint8_t last_read_len; // Length of data read into rx_buffer
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uint8_t ep_in_is_idle; // Set to 1 after IN endpoint gets idle
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} usb_webusb_state_t;
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secbool __wur usb_webusb_add(const usb_webusb_info_t *webusb_info);
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secbool __wur usb_webusb_can_read(uint8_t iface_num);
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secbool __wur usb_webusb_can_write(uint8_t iface_num);
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int __wur usb_webusb_read(uint8_t iface_num, uint8_t *buf, uint32_t len);
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int __wur usb_webusb_write(uint8_t iface_num, const uint8_t *buf, uint32_t len);
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int __wur usb_webusb_read_select(uint32_t timeout);
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int __wur usb_webusb_read_blocking(uint8_t iface_num, uint8_t *buf, uint32_t len, int timeout);
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int __wur usb_webusb_write_blocking(uint8_t iface_num, const uint8_t *buf, uint32_t len, int timeout);
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