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: Timur Tabi <ti...@codeaurora.org>
---
drivers/net/ethernet/qualcomm/emac/emac-sgmii-qdf2400.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/qualcomm/emac/emac-sgmii-qdf2400.c
b/drivers/net/ethernet/qualcomm/emac/emac-sgmii-qdf2400.c
index f62c215..7116be4 100644
--- a/drivers/net/ethernet/qualcomm/emac/emac-sgmii-qdf2400.c
+++ b/drivers/net/ethernet/qualcomm/emac/emac-sgmii-qdf2400.c
@@ -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 void emac_reg_write_all(void __iomem *base,
{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},
--
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm
Technologies, Inc. Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.
