W5200_SPI_WRITE_OPCODE
u8 cmd[5] = { addr >> 8, addr & 0xff, W5200_SPI_WRITE_OPCODE, 1, data };
W5200_SPI_WRITE_OPCODE, 2,
spi_priv->cmd_buf[2] = W5200_SPI_WRITE_OPCODE | (len >> 8);