新增usb hid report解析器 (#58)

* new: usb hid parser
This commit is contained in:
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2022-10-14 18:45:10 +08:00
committed by GitHub
parent 80edc58cf0
commit 39f11c5b4b
11 changed files with 2567 additions and 102 deletions

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#pragma once
#include <common/stddef.h>
// 当函数的返回值未被使用时,编译器抛出警告信息
#define __must_check __attribute__((__warn_unused_result__))

97
kernel/common/hid.h Normal file
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#pragma once
#include <common/stddef.h>
#define __HID_USAGE_TABLE_SIZE 64 // usage stack的大小
#define HID_MAX_REPORT 300 // 最大允许的hid report数目包括feature、input、output
#define HID_MAX_PATH_SIZE 16 // maximum depth for path
/**
* @brief 描述hid path中的一个节点
*
*/
struct hid_node_t
{
int u_page;
int usage;
};
/**
* @brief 描述一条hid path
*
*/
struct hid_path_t
{
int size; // 路径中的节点数目
struct hid_node_t node[HID_MAX_PATH_SIZE];
};
/**
* @brief Describe a HID Data with its location in report
*
*/
struct hid_data_t
{
int value; // hid对象的值
struct hid_path_t path; // hid path
int report_count; // count of reports for this usage type
int offset; // offset of data in report
int size; // size of data in bits
uint8_t report_id; // report id(from incoming report)
uint8_t type; // 数据类型FEATURE / INPUT / OUTPUT
uint8_t attribute; // report field attribute. (2 = (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position))
// (6 = (Data,Var,Rel,No Wrap,Linear,Preferred State,No Null Position))
int8_t unit_exp; // unit exponent;
uint32_t unit; // HID unit
int logical_min; // Logical min
int logical_max; // Logical max
int phys_min; // Physical min
int phys_max; // Physical max
};
/**
* @brief hid解析器
*
*/
struct hid_parser
{
const uint8_t *report_desc; // 指向report descriptor的指针
int report_desc_size; // report descriptor的大小字节
int pos; // report_desc中当前正在处理的位置
uint8_t item; // 暂存当前的item
uint32_t value; // 暂存当前的值
struct hid_data_t data; // 存储当前的环境
int offset_table[HID_MAX_REPORT][3]; // 存储 hid report的ID、type、offset
int report_count; // hid report的数量
int count; // local items的计数
uint32_t u_page;
struct hid_node_t usage_table[__HID_USAGE_TABLE_SIZE]; // Usage stack
int usage_size; // usage的数量
int usage_min;
int usage_max;
int cnt_objects; // report descriptor中的对象数目
int cnt_report // report desc中的report数目
};
struct hid_usage_types_string
{
int value;
const char *string;
};
struct hid_usage_pages_string
{
int value;
struct hid_usage_types_string * types;
const char * string;
};
int hid_parse_report(const void *report_data, const int len);