TSEC: add config options for VSC8601 RGMII PHY

The Vitesse VSC8601 RGMII PHY has internal delay for both Rx
and Tx clock lines. They are configured using 2 bits in extended
register 0x17.
Therefore CFG_VSC8601_SKEW_TX and CFG_VSC8601_SKEW_RX have
been introduced with valid values 0-3 giving 0.0, 1.4,1.7 and 2.0ns delay.

Signed-off-by: Andre Schwarz <andre.schwarz@matrix-vision.de>
Acked-by: Andy Fleming <afleming@freescale.com>
Acked-by: Ben Warren <biggerbadderben@gmail.com>
--

 drivers/net/tsec.c |    6 ++++++
 drivers/net/tsec.h |    3 +++
 2 files changed, 9 insertions(+), 0 deletions(-)

drivers/net/tsec.c

@@ -1277,6 +1277,12 @@ struct phy_info phy_info_VSC8601 = {
 				{MIIM_CONTROL, MIIM_CONTROL_INIT, &mii_cr_init},
 #ifdef CFG_VSC8601_SKEWFIX
 				{MIIM_VSC8601_EPHY_CON,MIIM_VSC8601_EPHY_CON_INIT_SKEW,NULL},
+if defined(CFG_VSC8601_SKEW_TX) && defined(CFG_VSC8601_SKEW_RX)
+				{MIIM_EXT_PAGE_ACCESS,1,NULL},
+#define VSC8101_SKEW	(CFG_VSC8601_SKEW_TX<<14)|(CFG_VSC8601_SKEW_RX<<12)
+				{MIIM_VSC8601_SKEW_CTRL,VSC8101_SKEW,NULL},
+				{MIIM_EXT_PAGE_ACCESS,0,NULL},
+#endif
 #endif
 				{miim_end,}
 				 },

drivers/net/tsec.h

@@ -112,6 +112,8 @@
 #define MIIM_GBIT_CONTROL	0x9
 #define MIIM_GBIT_CONTROL_INIT	0xe00
 
+#define MIIM_EXT_PAGE_ACCESS	0x1f
+
 /* Broadcom BCM54xx -- taken from linux sungem_phy */
 #define MIIM_BCM54xx_AUXSTATUS			0x19
 #define MIIM_BCM54xx_AUXSTATUS_LINKMODE_MASK	0x0700
@@ -161,8 +163,9 @@
 
 /* Entry for Vitesse VSC8601 regs starts here (Not complete) */
 /* Vitesse VSC8601 Extended PHY Control Register 1 */
-#define MIIM_VSC8601_EPHY_CON			0x17
+#define MIIM_VSC8601_EPHY_CON		0x17
 #define MIIM_VSC8601_EPHY_CON_INIT_SKEW	0x1120
+#define MIIM_VSC8601_SKEW_CTRL		0x1c
 
 /* 88E1011 PHY Status Register */
 #define MIIM_88E1011_PHY_STATUS         0x11
@@ -177,9 +180,9 @@
 #define MIIM_88E1011_PHY_MDI_X_AUTO	0x0060
 
 /* 88E1111 PHY LED Control Register */
-#define MIIM_88E1111_PHY_LED_CONTROL   24
-#define MIIM_88E1111_PHY_LED_DIRECT    0x4100
-#define MIIM_88E1111_PHY_LED_COMBINE   0x411C
+#define MIIM_88E1111_PHY_LED_CONTROL	24
+#define MIIM_88E1111_PHY_LED_DIRECT	0x4100
+#define MIIM_88E1111_PHY_LED_COMBINE	0x411C
 
 /* 88E1145 Extended PHY Specific Control Register */
 #define MIIM_88E1145_PHY_EXT_CR 20