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authorVladimir Oltean <vladimir.oltean@nxp.com>2021-06-11 23:05:25 +0300
committerDavid S. Miller <davem@davemloft.net>2021-06-11 13:43:56 -0700
commitdd0721ea4c7a6c2ec8b309ff57d74d88f08d4c23 (patch)
tree1b71de6869d88e0bd1ddfdebb0465ade16890b3b /include/linux/pcs
parent36641b045c839797739f9863e86e4dae2370e24f (diff)
net: pcs: xpcs: add support for NXP SJA1105
The NXP SJA1105 DSA switch integrates a Synopsys SGMII XPCS on port 4. The generic code works fine, except there is an integration issue which needs to be dealt with: in this switch, the XPCS is integrated with a PMA that has the TX lane polarity inverted by default (PLUS is MINUS, MINUS is PLUS). To obtain normal non-inverted behavior, the TX lane polarity must be inverted in the PCS, via the DIGITAL_CONTROL_2 register. We introduce a pma_config() method in xpcs_compat which is called by the phylink_pcs_config() implementation. Also, the NXP SJA1105 returns all zeroes in the PHY ID registers 2 and 3. We need to hack up an ad-hoc PHY ID (OUI is zero, device ID is 1) in order for the XPCS driver to recognize it. This PHY ID is added to the public include/linux/pcs/pcs-xpcs.h for that reason (for the sja1105 driver to be able to use it in a later patch). Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/pcs')
-rw-r--r--include/linux/pcs/pcs-xpcs.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/pcs/pcs-xpcs.h b/include/linux/pcs/pcs-xpcs.h
index 4f1cdf6f3d4c..c594f7cdc304 100644
--- a/include/linux/pcs/pcs-xpcs.h
+++ b/include/linux/pcs/pcs-xpcs.h
@@ -10,6 +10,8 @@
#include <linux/phy.h>
#include <linux/phylink.h>
+#define NXP_SJA1105_XPCS_ID 0x00000010
+
/* AN mode */
#define DW_AN_C73 1
#define DW_AN_C37_SGMII 2