On 12/17/2023 3:08 AM, Russell King (Oracle) wrote:
On Sat, Dec 16, 2023 at 06:30:00PM +0100, Andrew Lunn wrote:
The following is the chip package, the chip can work on the switch mode
like the existed upstream code qca8k, where PHY1-PHY4 is connected with
MAC1-MAC4 directly; The chip can also work on the PHY mode, where PHY1-
PHY4 is connected with PCS1 by 10g-qxgmii; Either switch mode or PHY mode,
the PHY4 is optionally connected with PCS0 by SGMII, PCS0 and PCS1
are connected with the SoC(IPQ platform) PCSes.
I don't really understand. Are you saying the hardware is actually :
+----------------------------------------------+
| PCS1 PCS0 |
| |
| MAC0 MAC5 |
| | | |
| +-----+--------------+-------------+ |
| | | |
| | Switch | |
| | | |
| +-+---------+---------+---------+--+ |
| | | | | |
| MAC1 MAC2 MAC3 MAC4 |
| |
| PHY1 PHY2 PHY3 PHY4 |
+----------------------------------------------+
When in PHY mode, the switch is hard coded to map the 4 PCS1 channels
straight to MAC1-MAC4 and all switch functionality is disabled. But
then in switch mode, the switch can be controlled as a DSA switch? The
10G PCS1 is then a single 10G port, not 4x 2.5G?
Is there a product brief for this PHY? That might help us understand
this hardware?
Not even digikey give any clues what "QCA8084" is - they list it as
"unclassified" and give no documentation and no photo. Basically it
seems to be a super secret device.
Sorry for the confusion here, maybe the chip is developed recently,
which leads to the Doc or introduction is not released in time.
