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27 lines
1,001 B
Text
27 lines
1,001 B
Text
Introduction
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============
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Gadget serial driver is divided into two parts.
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1. f_serial.c : Interacts with USB Gadget Layer
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2. u_serial.c : Interacts with TTY Layer
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Gadget smd driver adds capability to interact with smd layer in
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case modem device is inter-connected with smd interface.
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S/W Description
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===============
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Gadget smd driver is a simple bridge driver between usb serial
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gadget and smd abstraction layer. It registers with smd
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abstraction layer with notification call back and provides
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USB connect/disconnect call backs usb gadget serial driver.
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S/W Control Flow:
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=================
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USB SMD driver registers w/ SMD driver and provides notification
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call back. SMD Driver calls this call back whenever DATA is available
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to read, buffer is available to write or modem control signals changed.
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Upon receiving notification from SMD driver, USB driver appropriately
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schedules read/write works. In case of control singals, USB driver
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notifies gadget component with changed control information.
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