diff options
| author | Giuseppe CAVALLARO <peppe.cavallaro@st.com> | 2013-03-26 05:43:12 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-03-26 17:53:37 +0100 |
| commit | 94fbbbf89492e460979cd10c6384a78a9dbf17ed (patch) | |
| tree | 6a3a34736d7a388b83bec7d140302715640d505f /Documentation/networking/stmmac.txt | |
| parent | stmmac: add the support for PTP hw clock driver (diff) | |
| download | linux-94fbbbf89492e460979cd10c6384a78a9dbf17ed.tar.xz linux-94fbbbf89492e460979cd10c6384a78a9dbf17ed.zip | |
stmmac: update the Doc and Version (PTP+SGMII)
This patch updates the stmmac.txt file adding information related to the PTP
and SGMII/RGMII supports.
Also the patch updates the driver version to: March_2013.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking/stmmac.txt')
| -rw-r--r-- | Documentation/networking/stmmac.txt | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/Documentation/networking/stmmac.txt b/Documentation/networking/stmmac.txt index f9fa6db40a52..8efe0b3c8b83 100644 --- a/Documentation/networking/stmmac.txt +++ b/Documentation/networking/stmmac.txt @@ -326,6 +326,35 @@ To enter in Tx LPI mode the driver needs to have a software timer that enable and disable the LPI mode when there is nothing to be transmitted. -7) TODO: +7) Extended descriptors +The extended descriptors give us information about the receive Ethernet payload +when it is carrying PTP packets or TCP/UDP/ICMP over IP. +These are not available on GMAC Synopsys chips older than the 3.50. +At probe time the driver will decide if these can be actually used. +This support also is mandatory for PTPv2 because the extra descriptors 6 and 7 +are used for saving the hardware timestamps. + +8) Precision Time Protocol (PTP) +The driver supports the IEEE 1588-2002, Precision Time Protocol (PTP), +which enables precise synchronization of clocks in measurement and +control systems implemented with technologies such as network +communication. + +In addition to the basic timestamp features mentioned in IEEE 1588-2002 +Timestamps, new GMAC cores support the advanced timestamp features. +IEEE 1588-2008 that can be enabled when configure the Kernel. + +9) SGMII/RGMII supports +New GMAC devices provide own way to manage RGMII/SGMII. +This information is available at run-time by looking at the +HW capability register. This means that the stmmac can manage +auto-negotiation and link status w/o using the PHYLIB stuff +In fact, the HW provides a subset of extended registers to +restart the ANE, verify Full/Half duplex mode and Speed. +Also thanks to these registers it is possible to look at the +Auto-negotiated Link Parter Ability. + +10) TODO: o XGMAC is not supported. - o Add the PTP - precision time protocol + o Complete the TBI & RTBI support. + o extened VLAN support for 3.70a SYNP GMAC. |