projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| e38eb2c8 AP |
1 | This file summarizes information on basic testing of USB functions |
| 2 | provided by gadgets. | |
| 3 | ||
| 4 | 1. ACM function | |
| d5862ca6 | 5 | 2. ECM function |
| 7bfbc6e3 | 6 | 3. ECM subset function |
| e38eb2c8 AP |
7 | |
| 8 | ||
| 9 | 1. ACM function | |
| 10 | =============== | |
| 11 | ||
| 12 | The function is provided by usb_f_acm.ko module. | |
| 13 | ||
| 14 | Function-specific configfs interface | |
| 15 | ------------------------------------ | |
| 16 | ||
| 17 | The function name to use when creating the function directory is "acm". | |
| 18 | The ACM function provides just one attribute in its function directory: | |
| 19 | ||
| 20 | port_num | |
| 21 | ||
| 22 | The attribute is read-only. | |
| 23 | ||
| 24 | There can be at most 4 ACM/generic serial/OBEX ports in the system. | |
| 25 | ||
| 26 | ||
| 27 | Testing the ACM function | |
| 28 | ------------------------ | |
| 29 | ||
| 30 | On the host: cat > /dev/ttyACM<X> | |
| 31 | On the device : cat /dev/ttyGS<Y> | |
| 32 | ||
| 33 | then the other way round | |
| 34 | ||
| 35 | On the device: cat > /dev/ttyGS<Y> | |
| 36 | On the host: cat /dev/ttyACM<X> | |
| d5862ca6 AP |
37 | |
| 38 | 2. ECM function | |
| 39 | =============== | |
| 40 | ||
| 41 | The function is provided by usb_f_ecm.ko module. | |
| 42 | ||
| 43 | Function-specific configfs interface | |
| 44 | ------------------------------------ | |
| 45 | ||
| 46 | The function name to use when creating the function directory is "ecm". | |
| 47 | The ECM function provides these attributes in its function directory: | |
| 48 | ||
| 49 | ifname - network device interface name associated with this | |
| 50 | function instance | |
| 51 | qmult - queue length multiplier for high and super speed | |
| 52 | host_addr - MAC address of host's end of this | |
| 53 | Ethernet over USB link | |
| 54 | dev_addr - MAC address of device's end of this | |
| 55 | Ethernet over USB link | |
| 56 | ||
| 57 | and after creating the functions/ecm.<instance name> they contain default | |
| 58 | values: qmult is 5, dev_addr and host_addr are randomly selected. | |
| 59 | Except for ifname they can be written to until the function is linked to a | |
| 60 | configuration. The ifname is read-only and contains the name of the interface | |
| 61 | which was assigned by the net core, e. g. usb0. | |
| 62 | ||
| 63 | Testing the ECM function | |
| 64 | ------------------------ | |
| 65 | ||
| 66 | Configure IP addresses of the device and the host. Then: | |
| 67 | ||
| 68 | On the device: ping <host's IP> | |
| 69 | On the host: ping <device's IP> | |
| 7bfbc6e3 AP |
70 | |
| 71 | 3. ECM subset function | |
| 72 | ====================== | |
| 73 | ||
| 74 | The function is provided by usb_f_ecm_subset.ko module. | |
| 75 | ||
| 76 | Function-specific configfs interface | |
| 77 | ------------------------------------ | |
| 78 | ||
| 79 | The function name to use when creating the function directory is "geth". | |
| 80 | The ECM subset function provides these attributes in its function directory: | |
| 81 | ||
| 82 | ifname - network device interface name associated with this | |
| 83 | function instance | |
| 84 | qmult - queue length multiplier for high and super speed | |
| 85 | host_addr - MAC address of host's end of this | |
| 86 | Ethernet over USB link | |
| 87 | dev_addr - MAC address of device's end of this | |
| 88 | Ethernet over USB link | |
| 89 | ||
| 90 | and after creating the functions/ecm.<instance name> they contain default | |
| 91 | values: qmult is 5, dev_addr and host_addr are randomly selected. | |
| 92 | Except for ifname they can be written to until the function is linked to a | |
| 93 | configuration. The ifname is read-only and contains the name of the interface | |
| 94 | which was assigned by the net core, e. g. usb0. | |
| 95 | ||
| 96 | Testing the ECM subset function | |
| 97 | ------------------------------- | |
| 98 | ||
| 99 | Configure IP addresses of the device and the host. Then: | |
| 100 | ||
| 101 | On the device: ping <host's IP> | |
| 102 | On the host: ping <device's IP> |