58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/* usb_descriptor.h - header for common device descriptor */
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/*
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* Copyright (c) 2017 PHYTEC Messtechnik GmbH
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef __USB_DESCRIPTOR_H__
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#define __USB_DESCRIPTOR_H__
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/*
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* The USB Unicode bString is encoded in UTF16LE, which means it takes up
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* twice the amount of bytes than the same string encoded in ASCII7.
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* Use this macro to determine the length of the bString array.
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*
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* bString length without null character:
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* bString_length = (sizeof(initializer_string) - 1) * 2
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* or:
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* bString_length = sizeof(initializer_string) * 2 - 2
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*/
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#define USB_BSTRING_LENGTH(s) (sizeof(s) * 2 - 2)
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/*
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* The length of the string descriptor (bLength) is calculated from the
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* size of the two octets bLength and bDescriptorType plus the
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* length of the UTF16LE string:
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*
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* bLength = 2 + bString_length
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* bLength = 2 + sizeof(initializer_string) * 2 - 2
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* bLength = sizeof(initializer_string) * 2
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* Use this macro to determine the bLength of the string descriptor.
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*/
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#define USB_STRING_DESCRIPTOR_LENGTH(s) (sizeof(s) * 2)
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/* Automatic endpoint assignment */
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#define AUTO_EP_IN 0x80
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#define AUTO_EP_OUT 0x00
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/* Common part of device data */
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struct usb_dev_data {
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const struct device *dev;
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sys_snode_t node;
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};
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struct usb_dev_data *usb_get_dev_data_by_cfg(sys_slist_t *list,
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struct usb_cfg_data *cfg);
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struct usb_dev_data *usb_get_dev_data_by_iface(sys_slist_t *list,
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uint8_t iface_num);
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struct usb_dev_data *usb_get_dev_data_by_ep(sys_slist_t *list, uint8_t ep);
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int usb_get_str_descriptor_idx(void *ptr);
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uint8_t *usb_update_sn_string_descriptor(void);
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uint8_t *usb_get_device_descriptor(void);
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#endif /* __USB_DESCRIPTOR_H__ */
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