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Date: Thu, 7 Mar 2013 11:50:19 +0100 From: Giuseppe CAVALLARO <peppe.cavallaro@...com> To: netdev@...r.kernel.org Cc: bh74.an@...sung.com, ayagond@...avyalabs.com, Giuseppe Cavallaro <peppe.cavallaro@...com> Subject: [net-next.git 9/9] 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@...com> --- Documentation/networking/stmmac.txt | 39 ++++++++++++++++++++++++- drivers/net/ethernet/stmicro/stmmac/stmmac.h | 2 +- 2 files changed, 38 insertions(+), 3 deletions(-) diff --git a/Documentation/networking/stmmac.txt b/Documentation/networking/stmmac.txt index f9fa6db..f7d8c3d 100644 --- a/Documentation/networking/stmmac.txt +++ b/Documentation/networking/stmmac.txt @@ -326,6 +326,41 @@ 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 CONFIG_STMMAC_EXTENDED_DESC option can be enabled to use the +the extended status in the descriptors. For RDESC, that gives some +information about the receive Ethernet payload when it is carrying PTP +packets or TCP/UDP/ICMP over IP. +This option cannot be used on GMAC Synopsys older than the 3.50 +so the driver's probe will fail in this scenario. +This option also is mandatory for PTPv2 because the extra descriptors +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. +This is the Kernel option to enable it: CONFIG_STMMAC_USE_HWSTAMP + +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. This is +its option: CONFIG_STMMAC_USE_HW_A_STAMP +To use this support the HW has to have the extended descriptors. +At run time this will be verified by looking at the HW capability +register. + +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. diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h index 200011d..78bc4d1 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h @@ -24,7 +24,7 @@ #define __STMMAC_H__ #define STMMAC_RESOURCE_NAME "stmmaceth" -#define DRV_MODULE_VERSION "Nov_2012" +#define DRV_MODULE_VERSION "March_2013" #include <linux/clk.h> #include <linux/stmmac.h> -- 1.7.4.4 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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