Linux Network device driver programming (4)

Four. DM9000 Network card driver Depth analysis

1. Initialization of the DM9000

Dm9000_init ()

{

1. Assigning Net_device Structures

2. Get the address break number from the Platform_device

3. Map the acquired address to the virtual address operation function Io_remp ()

4. Read the chip type

5. Set the number of operating functions

6. Register the network card driver register

}

2. Dm9000_open ()

{

1. Ifconfig eth0 up

}

3. Dm9000_xmit ()

{

1. Notify the Protocol line, pause the function that transmits data to drive Netif-stop-queue

2. Length of write sent data

3. Write data to be sent

4. Start the Send

5. Wait for Send to end

}

Linux Network device driver programming (4)