1 __le64 cpu_to_le64(u64);
   2 __le32 cpu_to_le32(u32);
   3 __le16 cpu_to_le16(u16);

   1 u64 le64_to_cpu(__le64);
   2 u32 le32_to_cpu(__le32);
   3 u16 le16_to_cpu(__le16);

   1 __be64 cpu_to_be64(u64);
   2 __be32 cpu_to_be32(u32);
   3 __be16 cpu_to_be16(u16);
   4 u64 be64_to_cpu(__be64);
   5 u32 be32_to_cpu(__be32);
   6 u16 be16_to_cpu(__be16);

   1 __le64 cpu_to_le64p(u64 *);
   2 __le32 cpu_to_le32p(u32 *);
   3 __le16 cpu_to_le16p(u16 *);
   4 u64 le64_to_cpup(__le64 *);
   5 u32 le32_to_cpup(__le32 *);
   6 u16 le16_to_cpup(__le16 *);
   7 __be64 cpu_to_be64p(u64 *);
   8 __be32 cpu_to_be32p(u32 *);
   9 __be16 cpu_to_be16p(u16 *);
  10 u64 be64_to_cpup(__be64 *);
  11 u32 be32_to_cpup(__be32 *);
  12 u16 be16_to_cpup(__be16 *);

   1 void cpu_to_le64s(u64 *);
   2 void cpu_to_le32s(u32 *);
   3 void cpu_to_le16s(u16 *);
   4 void le64_to_cpus(u64 *);
   5 void le32_to_cpus(u32 *);
   6 void le16_to_cpus(u16 *);
   7 void cpu_to_be64s(u64 *);
   8 void cpu_to_be32s(u32 *);
   9 void cpu_to_be16s(u16 *);
  10 void be64_to_cpus(u64 *);
  11 void be32_to_cpus(u32 *);
  12 void be16_to_cpus(u16 *);

   1 struct visor_connection_info *connection_info;
   2 
   3 /* send a get connection info request */
   4 usb_control_msg(serial->dev,
   5                 usb_rcvctrlpipe(serial->dev, 0),
   6                 VISOR_GET_CONNECTION_INFORMATION,
   7                 0xc2, 0x0000, 0x0000,
   8                 transfer_buffer, 0x12, 300);
   9 
  10 connection_info = (struct visor_connection_info *)transfer_buffer;
  11 
  12 num_ports = le16_to_cpu(connection_info->num_ports);