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Date:	Tue, 28 Feb 2012 13:44:43 +0100
From:	Giuseppe CAVALLARO <>
Cc:	Giuseppe Cavallaro <>
Subject: [PATCH 3/4] stmmac: update the driver Documentation and add EEE

This patch updates the stmmac's documentation adding
some missing files in the secstion to describe the
driver's structure. Also the patch adds a new section
for the EEE support.

Signed-off-by: Giuseppe Cavallaro <>
 Documentation/networking/stmmac.txt |   36 +++++++++++++++++++++++++++++-----
 1 files changed, 30 insertions(+), 6 deletions(-)

diff --git a/Documentation/networking/stmmac.txt b/Documentation/networking/stmmac.txt
index d0aeead..cd38f6e 100644
--- a/Documentation/networking/stmmac.txt
+++ b/Documentation/networking/stmmac.txt
@@ -230,9 +230,11 @@ reset procedure etc).
  o Makefile
  o stmmac_main.c: main network device driver;
  o stmmac_mdio.c: mdio functions;
+ o stmmac_pci: PCI driver;
+ o stmmac_platform.c: platform driver
  o stmmac_ethtool.c: ethtool support;
  o stmmac_timer.[ch]: timer code used for mitigating the driver dma interrupts
-		      Only tested on ST40 platforms based.
+		      (only tested on ST40 platforms based);
  o stmmac.h: private driver structure;
  o common.h: common definitions and VFTs;
  o descs.h: descriptor structure definitions;
@@ -242,9 +244,11 @@ reset procedure etc).
  o dwmac100_core: MAC 100 core and dma code;
  o dwmac100_dma.c: dma funtions for the MAC chip;
  o dwmac1000.h: specific header file for the MAC;
- o dwmac_lib.c: generic DMA functions shared among chips
- o enh_desc.c: functions for handling enhanced descriptors
- o norm_desc.c: functions for handling normal descriptors
+ o dwmac_lib.c: generic DMA functions shared among chips;
+ o enh_desc.c: functions for handling enhanced descriptors;
+ o norm_desc.c: functions for handling normal descriptors;
+ o chain_mode.c/ring_mode.c:: functions to manage RING/CHAINED modes;
+ o mmc_core.c/mmc.h: Management MAC Counters;
 5) Debug Information
@@ -277,7 +281,27 @@ All these are only useful during the developing stage
 and should never enabled inside the code for general usage.
 In fact, these can generate an huge amount of debug messages.
-6) TODO:
+6) Energy Efficient Ethernet
+Energy Efficient Ethernet(EEE) enables IEEE 802.3 MAC sublayer along
+with a family of Physical layer to operate in the Low power Idle(LPI)
+mode. The EEE mode supports the IEEE 802.3 MAC operation at 100Mbps,
+1000Mbps & 10Gbps.
+The LPI mode allows power saving by switching off parts of the
+communication device functionality when there is no data to be
+transmitted & received. The system on both the side of the link can
+disable some functionalities & save power during the period of low-link
+utilization. The MAC controls whether the system should enter or exit
+the LPI mode & communicate this to PHY.
+As soon as the interface is opened, the driver verifies if the EEE can
+be supported. This is done by looking at both the DMA HW capability
+register and the PHY devices MCD registers.
+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
+7) TODO:
  o XGMAC is not supported.
- o Add the EEE - Energy Efficient Ethernet
  o Add the PTP - precision time protocol

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