AM2432: PRU-ICSSG: Stop the data transfer in the middle of MII_G_RT Auto-forward transfer.

Hi Shimizu-san,

Best way to stop auto-forwarding in a device is disable auto-forward in the MII_RT register.

I see two ways, one way is to disable by writing directly in to the register space. Second way is to use the macros we provides in icss_miirt_macros.inc file.

1. Direct way is to clear bit 9 (PRE_TX_AUTO_SEQUENCE0) in register MII_RT_TXCFG0/1. Note that you need to clear the bit only for the downstream port. When you device_n is on port 2, then you need to clear this bit MII_RT_TXCFG1.

2. If you are adopting PRU source code, then the PRU that handles downstream (e.g. PRU0 in the example of Port 1 is connected towards the controller and Port 2 towards direction of device_n), then call the macro M_DISABLE_TX_LOCAL when you want to stop sending. This will set bit 0 in MII_RT_TXCFG1, as seen in file  icss_miirt_macros.inc.

I am not sure about your use case for this function, maybe you can tell us more, so we can provide a more specific response.

Thanks and regards,

 Thomas