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Commit 57dacfed authored by Timur Tabi's avatar Timur Tabi Committed by David S. Miller
Browse files

net: qcom/emac: optimize QDF2400 SGMII RX/TX impedence values 



Adjust the impedance values of the RX and TX lanes in the SGMII block
so that they are closer to optimal values.

Signed-off-by: default avatarTimur Tabi <timur@codeaurora.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d9c0eb0c

drivers/net/ethernet/qualcomm/emac/emac-sgmii-qdf2400.c

+6 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 


/* SGMII digital lane registers */

#define EMAC_SGMII_LN_DRVR_CTRL0		0x000C

#define EMAC_SGMII_LN_DRVR_CTRL1		0x0010

#define EMAC_SGMII_LN_DRVR_TAP_EN		0x0018

#define EMAC_SGMII_LN_TX_MARGINING		0x001C

#define EMAC_SGMII_LN_TX_PRE			0x0020
@@ -48,6 +49,7 @@ 
#define EMAC_SGMII_LN_RX_EN_SIGNAL		0x02AC

#define EMAC_SGMII_LN_RX_MISC_CNTRL0		0x02B8

#define EMAC_SGMII_LN_DRVR_LOGIC_CLKDIV		0x02C8

#define EMAC_SGMII_LN_RX_RESECODE_OFFSET	0x02CC



/* SGMII digital lane register values */

#define UCDR_STEP_BY_TWO_MODE0			BIT(7)
@@ -73,6 +75,8 @@ 
#define CML_GEAR_MODE(x)			(((x) & 7) << 3)

#define CML2CMOS_IBOOST_MODE(x)			((x) & 7)



#define RESCODE_OFFSET(x)			((x) & 0x1f)



#define MIXER_LOADB_MODE(x)			(((x) & 0xf) << 2)

#define MIXER_DATARATE_MODE(x)			((x) & 3)
@@ -159,6 +163,8 @@ static const struct emac_reg_write sgmii_laned[] = { 
	{EMAC_SGMII_LN_PARALLEL_RATE, PARALLEL_RATE_MODE0(1)},

	{EMAC_SGMII_LN_TX_BAND_MODE, BAND_MODE0(1)},

	{EMAC_SGMII_LN_RX_BAND, BAND_MODE0(2)},

	{EMAC_SGMII_LN_DRVR_CTRL1, RESCODE_OFFSET(7)},

	{EMAC_SGMII_LN_RX_RESECODE_OFFSET, RESCODE_OFFSET(9)},

	{EMAC_SGMII_LN_LANE_MODE, LANE_MODE(26)},

	{EMAC_SGMII_LN_RX_RCVR_PATH1_MODE0, CDR_PD_SEL_MODE0(2) |

		EN_DLL_MODE0 | EN_IQ_DCC_MODE0 | EN_IQCAL_MODE0},