taglinefilesource code
CSR227drivers/net/depca.h#define CSR2       2
CSR2102drivers/net/ni65.c#define CSR2 0x02
CSR2281drivers/net/sk_g16.c#define CSR2            0x02 
CSR2124drivers/net/tulip.cCSR0=0,    CSR1=0x08, CSR2=0x10, CSR3=0x18, CSR4=0x20, CSR5=0x28,