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