Hi Linus,

I'm Allan, working for Microchip, who acquired Microsemi, who acquired Vitesse.

Alexandre pointed me to your comments on the VSC7384 switch done by Vitesse ~15
years ago. BTW: the chip is not being sold any more, and is unlikely to turn up
in new products.

I managed to find the complete datasheet of this device, and convincing people
that it can be "opened-up" meaning that it is available without any NDA or
similar. It is a 1.2mb/200 page pdf, it is not avialable at any web page (that I
know of), but if you are interested in having it then I can send it in a mail to
you.

The 09/20/2018 14:38, Linus Walleij wrote:

Just as a drive-by comment this seems vaguely related to the Vitesse
DSA switch I merged in drivers/net/dsa/vitesse-vsc73xx.c
The VSC* product name handily gives away the origin in Vitesse's
product line.

The VSC73xx also have the 8051 CPU and internal RAM, but are
accessed (typically) over SPI, and AFAICT this thing is talking over
MDIO.

The Vitesse 73xx however also supports a WAN port and VLANs
which makes it significantly different, falling into switch class I
guess.

That is right, here are the list of feature from page 1 in the datasheet.

Features:
- 12 Gigabit Ethernet ports with nonblocking wire- speed performance
- IEEE802.1Q-in-Q nested VLAN support
- Tri-speed (10/100/1000 Mbps) RGMII interfaces
- Full duplex flow control (IEEE802.3x) and half duplex back pressure
- Support for both wire-speed automatic learning, and CPU-based learning
- Flexible link aggregation compliant with IEEE802.3ad
- 208 kB on-chip frame buffer
- Spanning Tree Protocol support (IEEE802.1D)
- Jumbo frame support
- Multiple Spanning Tree support (IEEE802.1s)
- Programmable classifier for QoS (Layer 4/Multimedia) into four classes of
  service
- Port-based Access Control (IEEE802.1X)
- IGMP, GARP, GMRP, and GVRP support
- 8192 MAC addresses and 4,096 VLAN support (IEEE802.1Q)
- Cost effective 4-pin serial CPU interface
- Per-port shaping, policing, and Broadcast and Multicast Storm Control
- Selection between on-chip 8051 CPU, or off-chip 8-bit or 16-bit CPU for SNMP
  and Web-based management

/Allan