最終更新:2017-06-19 (月) 16:15:00 (2501d)  

Linux/USB/probe
Top / Linux / USB / probe

処理の流れ

  • Kernel has a list of registered drivers
  • Each driver has an array of acceptable device IDs ([[usb_driver.id_table])
  • Kernel goes through the list and if some id matches calls driver's probe()
  • If driver is not there udev may load it's module based on alias
  • Module aliases are generated based on acceptable device IDs
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usb_driver

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メモ

  • driver_info?
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マッチング

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usb_device_id

  • usb_driver.id_tableに指定
  • linux/usb.hで下記のように定義されている 
    #define USB_DEVICE(vend, prod) \
        .match_flags = USB_DEVICE_ID_MATCH_DEVICE, \
        .idVendor = (vend), \
        .idProduct = (prod)

#define USB_DEVICE_VER(vend, prod, lo, hi) \
        .match_flags = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION, \
        .idVendor = (vend), \
        .idProduct = (prod), \
        .bcdDevice_lo = (lo), \
        .bcdDevice_hi = (hi)

#define USB_DEVICE_INTERFACE_CLASS(vend, prod, cl) \
        .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
                       USB_DEVICE_ID_MATCH_INT_CLASS, \
        .idVendor = (vend), \
        .idProduct = (prod), \
        .bInterfaceClass = (cl)

#define USB_DEVICE_INTERFACE_PROTOCOL(vend, prod, pr) \
        .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
                       USB_DEVICE_ID_MATCH_INT_PROTOCOL, \
        .idVendor = (vend), \
        .idProduct = (prod), \
        .bInterfaceProtocol = (pr)
... and so on ...
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hid_device_id

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MODULE_DEVICE_TABLE

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関連

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参考




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