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Message-ID: <20231026101642.3913-1-Raju.Lakkaraju@microchip.com>
Date: Thu, 26 Oct 2023 15:46:42 +0530
From: Raju Lakkaraju <Raju.Lakkaraju@...rochip.com>
To: <netdev@...r.kernel.org>
CC: <davem@...emloft.net>, <kuba@...nel.org>,
<linux-kernel@...r.kernel.org>, <andrew@...n.ch>,
<Jose.Abreu@...opsys.com>, <linux@...linux.org.uk>,
<fancer.lancer@...il.com>, <UNGLinuxDriver@...rochip.com>
Subject: [PATCH net-next V2] net: pcs: xpcs: Add 2500BASE-X case in get state for XPCS drivers
Add DW_2500BASEX case in xpcs_get_state( ) to update speed, duplex and pause
Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@...rochip.com>
---
Change List:
============
V1 -> V2:
- Remove the default initialization of speed, pause and duplex
V0 -> V1:
- Remove the auto-negotiation check due to currently the DW_2500BASEX mode
doesn't imply any auto-negotiation
drivers/net/pcs/pcs-xpcs.c | 25 +++++++++++++++++++++++++
drivers/net/pcs/pcs-xpcs.h | 2 ++
2 files changed, 27 insertions(+)
diff --git a/drivers/net/pcs/pcs-xpcs.c b/drivers/net/pcs/pcs-xpcs.c
index 4dbc21f604f2..392aaad2d412 100644
--- a/drivers/net/pcs/pcs-xpcs.c
+++ b/drivers/net/pcs/pcs-xpcs.c
@@ -1090,6 +1090,24 @@ static int xpcs_get_state_c37_1000basex(struct dw_xpcs *xpcs,
return 0;
}
+static int xpcs_get_state_2500basex(struct dw_xpcs *xpcs,
+ struct phylink_link_state *state)
+{
+ int sts;
+
+ sts = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_STS);
+
+ state->link = !!(sts & DW_VR_MII_MMD_STS_LINK_STS);
+ if (!state->link)
+ return 0;
+
+ state->speed = SPEED_2500;
+ state->pause |= MLO_PAUSE_TX | MLO_PAUSE_RX;
+ state->duplex = DUPLEX_FULL;
+
+ return 0;
+}
+
static void xpcs_get_state(struct phylink_pcs *pcs,
struct phylink_link_state *state)
{
@@ -1127,6 +1145,13 @@ static void xpcs_get_state(struct phylink_pcs *pcs,
ERR_PTR(ret));
}
break;
+ case DW_2500BASEX:
+ ret = xpcs_get_state_2500basex(xpcs, state);
+ if (ret) {
+ pr_err("xpcs_get_state_2500basex returned %pe\n",
+ ERR_PTR(ret));
+ }
+ break;
default:
return;
}
diff --git a/drivers/net/pcs/pcs-xpcs.h b/drivers/net/pcs/pcs-xpcs.h
index 39a90417e535..96c36b32ca99 100644
--- a/drivers/net/pcs/pcs-xpcs.h
+++ b/drivers/net/pcs/pcs-xpcs.h
@@ -55,6 +55,8 @@
/* Clause 37 Defines */
/* VR MII MMD registers offsets */
#define DW_VR_MII_MMD_CTRL 0x0000
+#define DW_VR_MII_MMD_STS 0x0001
+#define DW_VR_MII_MMD_STS_LINK_STS BIT(2)
#define DW_VR_MII_DIG_CTRL1 0x8000
#define DW_VR_MII_AN_CTRL 0x8001
#define DW_VR_MII_AN_INTR_STS 0x8002
--
2.34.1
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