The Update Local Host operation transfers a firmware image and/or PIB image from the device to the local host for permanent storage. After the firmware and PIB are stored, the local host will reset the device and the device will retrieve parameters and firmware using the Boot from Host operation described in the next section.
The firmware may initiate this operation after a remote host has downloaded new firmware or PIB and issued a VS_MOD_NVM.REQ to the device, the device has been asked to restore factory default settings or the firmware has dynamically altered the runtime PIB in some way. Consequently, the device will be reset by the host in each case.
The device initiates this operation to complete an Upgrade Device operation when the device has no dedicated flash memory onboard. This operation requires running Atheros firmware on the device and custom software on the local host.
Figure 4.3. Update Local Host (INT6000/INT6300/INT6400)
INT6300/INT6400 LOCAL-HOST
[01] |-------- VS_HOST_ACTION.IND ------->| [01]
[03] |<------- VS_HOST_ACTION.RSP --------| [02]
| |
[04] |<------- VS_RD_MOD.REQ -------------| [04]
[04] |-------- VS_RD_MOD.CNF ------------>| [04]
[04] |<-----------------------------------| [04]
[04] |----------------------------------->| [04]
| |
[05] |<------- VS_RD_MOD.REQ -------------| [05]
[05] |-------- VS_RD_MOD.CNF ------------>| [05]
[05] |<-----------------------------------| [05]
[05] |----------------------------------->| [05]
| |
[06] |<------- VS_RS_DEV.REQ -------------| [06]
[07] |-------- VS_RS_DEV.CNF ------------>| [07]
The runtime firmware initiates this operation by broadcasting VS_HOST_ACTION.IND messages every 500 milliseconds. The HOST_ACTION_REQ field of the message can be either 0x01, 0x02 or 0x03 to indicate that a firmware image, a parameter block image or both are ready for upload by the local host.
The local host sends a VS_HOST_ACTION.RSP message to the device to indicate the ability and willingness to upload the information. The MSTATUS field is set to 0x00 for affirmative and 0x01 for negative.
Assuming an affirmative response, the device stops broadcasting and will wait indefinitely for local host action.
Optionally, the local host reads the firmware image from the device by sending a series of VS_RD_MOD.REQ messages to the device and waiting for a VS_RD_MOD.CNF message after each one. The message MODULEID field is set to 0x01 for this operation.
Optionally, the local host reads the PIB from the device by sending a series of VS_RD_MOD.REQ messages to the device and waiting for a VS_RD_MOD.CNF message after each one. The message MODULEID field is set to 0x02 for this operation.
The local host sends a VS_RS_DEV.REQ message to the device to initiate a firmware reboot.
The device sends a VS_RS_DEV.CNF to the host and performs a software reset. This forces a Boot from Host.