嵌入式LinuxHID多指触控/触摸设备报表描述符

这里只做一下简单记录，更为详细的修改流程后续的文章再介绍。

报表描述符 0x05, 0x0D, // Usage Page (Digitizer) 0x09, 0x04, // Usage (Touch Screen) 0xA1, 0x01, // Collection (Application) 0x85, 0x01, // Report ID (1) 0x09, 0x22, // Usage (Finger) 0xA1, 0x02, // Collection (Logical) 0x09, 0x42, // Usage (Tip Switch) 0x15, 0x00, // Logical Minimum (0) 0x25, 0x01, // Logical Maximum (1) 0x75, 0x01, // Report Size (1) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x95, 0x02, // Report Count (2) 0x81, 0x03, // Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x51, // Usage (0x51) 0x25, 0x1F, // Logical Maximum (31) 0x75, 0x05, // Report Size (5) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x05, 0x01, // Usage Page (Generic Desktop Ctrls) 0x75, 0x10, // Report Size (16) 0x09, 0x30, // Usage (X) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x31, // Usage (Y) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0xC0, // End Collection 0x05, 0x0D, // Usage Page (Digitizer) 0x09, 0x22, // Usage (Finger) 0xA1, 0x02, // Collection (Logical) 0x09, 0x42, // Usage (Tip Switch) 0x15, 0x00, // Logical Minimum (0) 0x25, 0x01, // Logical Maximum (1) 0x75, 0x01, // Report Size (1) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x95, 0x02, // Report Count (2) 0x81, 0x03, // Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x51, // Usage (0x51) 0x25, 0x1F, // Logical Maximum (31) 0x75, 0x05, // Report Size (5) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x05, 0x01, // Usage Page (Generic Desktop Ctrls) 0x75, 0x10, // Report Size (16) 0x09, 0x30, // Usage (X) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x31, // Usage (Y) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0xC0, // End Collection 0x05, 0x0D, // Usage Page (Digitizer) 0x09, 0x22, // Usage (Finger) 0xA1, 0x02, // Collection (Logical) 0x09, 0x42, // Usage (Tip Switch) 0x15, 0x00, // Logical Minimum (0) 0x25, 0x01, // Logical Maximum (1) 0x75, 0x01, // Report Size (1) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x95, 0x02, // Report Count (2) 0x81, 0x03, // Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x51, // Usage (0x51) 0x25, 0x1F, // Logical Maximum (31) 0x75, 0x05, // Report Size (5) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x05, 0x01, // Usage Page (Generic Desktop Ctrls) 0x75, 0x10, // Report Size (16) 0x09, 0x30, // Usage (X) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x31, // Usage (Y) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0xC0, // End Collection 0x05, 0x0D, // Usage Page (Digitizer) 0x09, 0x22, // Usage (Finger) 0xA1, 0x02, // Collection (Logical) 0x09, 0x42, // Usage (Tip Switch) 0x15, 0x00, // Logical Minimum (0) 0x25, 0x01, // Logical Maximum (1) 0x75, 0x01, // Report Size (1) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x95, 0x02, // Report Count (2) 0x81, 0x03, // Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x51, // Usage (0x51) 0x25, 0x1F, // Logical Maximum (31) 0x75, 0x05, // Report Size (5) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x05, 0x01, // Usage Page (Generic Desktop Ctrls) 0x75, 0x10, // Report Size (16) 0x09, 0x30, // Usage (X) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x31, // Usage (Y) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0xC0, // End Collection 0x05, 0x0D, // Usage Page (Digitizer) 0x09, 0x22, // Usage (Finger) 0xA1, 0x02, // Collection (Logical) 0x09, 0x42, // Usage (Tip Switch) 0x15, 0x00, // Logical Minimum (0) 0x25, 0x01, // Logical Maximum (1) 0x75, 0x01, // Report Size (1) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x95, 0x02, // Report Count (2) 0x81, 0x03, // Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x51, // Usage (0x51) 0x25, 0x1F, // Logical Maximum (31) 0x75, 0x05, // Report Size (5) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x05, 0x01, // Usage Page (Generic Desktop Ctrls) 0x75, 0x10, // Report Size (16) 0x09, 0x30, // Usage (X) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x31, // Usage (Y) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0xC0, // End Collection 0x05, 0x0D, // Usage Page (Digitizer) 0x09, 0x22, // Usage (Finger) 0xA1, 0x02, // Collection (Logical) 0x09, 0x42, // Usage (Tip Switch) 0x15, 0x00, // Logical Minimum (0) 0x25, 0x01, // Logical Maximum (1) 0x75, 0x01, // Report Size (1) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x95, 0x02, // Report Count (2) 0x81, 0x03, // Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x51, // Usage (0x51) 0x25, 0x1F, // Logical Maximum (31) 0x75, 0x05, // Report Size (5) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x05, 0x01, // Usage Page (Generic Desktop Ctrls) 0x75, 0x10, // Report Size (16) 0x09, 0x30, // Usage (X) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x31, // Usage (Y) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0xC0, // End Collection 0x05, 0x0D, // Usage Page (Digitizer) 0x09, 0x22, // Usage (Finger) 0xA1, 0x02, // Collection (Logical) 0x09, 0x42, // Usage (Tip Switch) 0x15, 0x00, // Logical Minimum (0) 0x25, 0x01, // Logical Maximum (1) 0x75, 0x01, // Report Size (1) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x95, 0x02, // Report Count (2) 0x81, 0x03, // Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x51, // Usage (0x51) 0x25, 0x1F, // Logical Maximum (31) 0x75, 0x05, // Report Size (5) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x05, 0x01, // Usage Page (Generic Desktop Ctrls) 0x75, 0x10, // Report Size (16) 0x09, 0x30, // Usage (X) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x31, // Usage (Y) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0xC0, // End Collection 0x05, 0x0D, // Usage Page (Digitizer) 0x09, 0x22, // Usage (Finger) 0xA1, 0x02, // Collection (Logical) 0x09, 0x42, // Usage (Tip Switch) 0x15, 0x00, // Logical Minimum (0) 0x25, 0x01, // Logical Maximum (1) 0x75, 0x01, // Report Size (1) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x95, 0x02, // Report Count (2) 0x81, 0x03, // Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x51, // Usage (0x51) 0x25, 0x1F, // Logical Maximum (31) 0x75, 0x05, // Report Size (5) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x05, 0x01, // Usage Page (Generic Desktop Ctrls) 0x75, 0x10, // Report Size (16) 0x09, 0x30, // Usage (X) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x31, // Usage (Y) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0xC0, // End Collection 0x05, 0x0D, // Usage Page (Digitizer) 0x09, 0x22, // Usage (Finger) 0xA1, 0x02, // Collection (Logical) 0x09, 0x42, // Usage (Tip Switch) 0x15, 0x00, // Logical Minimum (0) 0x25, 0x01, // Logical Maximum (1) 0x75, 0x01, // Report Size (1) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x95, 0x02, // Report Count (2) 0x81, 0x03, // Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x51, // Usage (0x51) 0x25, 0x1F, // Logical Maximum (31) 0x75, 0x05, // Report Size (5) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x05, 0x01, // Usage Page (Generic Desktop Ctrls) 0x75, 0x10, // Report Size (16) 0x09, 0x30, // Usage (X) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x31, // Usage (Y) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0xC0, // End Collection 0x05, 0x0D, // Usage Page (Digitizer) 0x09, 0x22, // Usage (Finger) 0xA1, 0x02, // Collection (Logical) 0x09, 0x42, // Usage (Tip Switch) 0x15, 0x00, // Logical Minimum (0) 0x25, 0x01, // Logical Maximum (1) 0x75, 0x01, // Report Size (1) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x95, 0x02, // Report Count (2) 0x81, 0x03, // Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x51, // Usage (0x51) 0x25, 0x1F, // Logical Maximum (31) 0x75, 0x05, // Report Size (5) 0x95, 0x01, // Report Count (1) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x05, 0x01, // Usage Page (Generic Desktop Ctrls) 0x75, 0x10, // Report Size (16) 0x09, 0x30, // Usage (X) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x09, 0x31, // Usage (Y) 0x26, 0xFF, 0x7F, // Logical Maximum (32767) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0xC0, // End Collection 0x05, 0x0D, // Usage Page (Digitizer) 0x15, 0x00, // Logical Minimum (0) 0x27, 0xFF, 0xFF, 0x00, 0x00, // Logical Maximum (65534) 0x75, 0x10, // Report Size (16) 0x95, 0x01, // Report Count (1) 0x09, 0x56, // Usage (0x56) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x25, 0x0A, // Logical Maximum (10) 0x75, 0x08, // Report Size (8) 0x09, 0x54, // Usage (0x54) 0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position) 0x85, 0x02, // Report ID (2) 0x09, 0x55, // Usage (0x55) 0xB1, 0x02, // Feature (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile) 0xC0, // End Collection // 548 bytes

如果直接使用报表描述符是无法使用的，因为描述符内有feature特性，而linux内核自动对此响应了00。需要修改内核（这里以kernel4.19版本为例）。

修改kernel/drivers/usb/gadget/function/f_hid.c的hidg_setup方法

进行如下修改