net: pcs: xpcs: Add Baikal-T1 XPCS supportxgmac/ext1/pcs

Baikal-T1 SoC is synthesized with the DW XPCS v3.11b IP-core attached to
DW xGMAC v2.11a over the XGMII interface. DW XPCS is configured to be of
the Back-plane multi-mode with KR/KX4 speeds support (no 1G speed). Thus
the PCS sublayer supports Clause 73 and 72 auto-negotiations performed
over the 10GBASE-KR and 10GBASE-KX4 link modes.

So in order to have the denoted features enabled for the Baikal-T1
XGMAC/XPCS chain the DW XPCS driver is updated with the Baikal-T1
XPCS-specific compat-list. It will be selected in case if the platform
detects the "baikal,bt1-xpcs" compatible device or a device with the
custom BT1_XGMAC_XPCS_ID id.

Note the XPCS device is synthesized with the Synopsys 10G Gen5 PMA. Thus
the corresponding PMA-id is specified in order activate the PMA-specific
config methods.

Signed-off-by: Serge Semin <fancer.lancer@gmail.com>

3 files changed, 31 insertions, 0 deletions

diff --git a/drivers/net/pcs/pcs-xpcs-plat.c b/drivers/net/pcs/pcs-xpcs-plat.c
index e48b9586026c..7ee57de7ec57 100644
--- a/drivers/net/pcs/pcs-xpcs-plat.c
+++ b/drivers/net/pcs/pcs-xpcs-plat.c
@@ -427,6 +427,7 @@ DW_XPCS_INFO_DECLARE(xpcs_pma_gen4_3g, DW_XPCS_ID_NATIVE, DW_XPCS_PMA_GEN4_3G_ID
 DW_XPCS_INFO_DECLARE(xpcs_pma_gen4_6g, DW_XPCS_ID_NATIVE, DW_XPCS_PMA_GEN4_6G_ID);
 DW_XPCS_INFO_DECLARE(xpcs_pma_gen5_10g, DW_XPCS_ID_NATIVE, DW_XPCS_PMA_GEN5_10G_ID);
 DW_XPCS_INFO_DECLARE(xpcs_pma_gen5_12g, DW_XPCS_ID_NATIVE, DW_XPCS_PMA_GEN5_12G_ID);
+DW_XPCS_INFO_DECLARE(xpcs_bt1, BT1_XGMAC_XPCS_ID, DW_XPCS_PMA_GEN5_10G_ID);
 
 static const struct of_device_id xpcs_of_ids[] = {
 	{ .compatible = "snps,dw-xpcs", .data = &xpcs_generic },
@@ -437,6 +438,7 @@ static const struct of_device_id xpcs_of_ids[] = {
 	{ .compatible = "snps,dw-xpcs-gen4-6g", .data = &xpcs_pma_gen4_6g },
 	{ .compatible = "snps,dw-xpcs-gen5-10g", .data = &xpcs_pma_gen5_10g },
 	{ .compatible = "snps,dw-xpcs-gen5-12g", .data = &xpcs_pma_gen5_12g },
+	{ .compatible = "baikal,bt1-xpcs", .data = &xpcs_bt1 },
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, xpcs_of_ids);
diff --git a/drivers/net/pcs/pcs-xpcs.c b/drivers/net/pcs/pcs-xpcs.c
index fcf43f2e82c5..cceae9767399 100644
--- a/drivers/net/pcs/pcs-xpcs.c
+++ b/drivers/net/pcs/pcs-xpcs.c
@@ -1642,6 +1642,30 @@ static const struct dw_xpcs_compat nxp_sja1110_xpcs_compat[] = {
 	}
 };
 
+static const struct dw_xpcs_compat bt1_xpcs_compat[] = {
+	{
+		.interface = PHY_INTERFACE_MODE_XGMII,
+		.supported = xpcs_xgmii_features,
+		.an_mode = DW_AN_C73,
+	}, {
+		.interface = PHY_INTERFACE_MODE_10GBASER,
+		.supported = xpcs_10gbaser_features,
+		.an_mode = DW_10GBASER,
+		.pma_config = xpcs_10gbaser_pma_config,
+	}, {
+		.interface = PHY_INTERFACE_MODE_10GBASEX,
+		.supported = xpcs_10gbasex_features,
+		.an_mode = DW_10GBASEX,
+		.pma_config = xpcs_10gbasex_pma_config,
+	}, {
+		.interface = PHY_INTERFACE_MODE_XAUI,
+		.supported = xpcs_10gbasex_features,
+		.an_mode = DW_10GBASEX,
+		.pma_config = xpcs_10gbasex_pma_config,
+	}, {
+	}
+};
+
 static const struct dw_xpcs_desc xpcs_desc_list[] = {
 	{
 		.id = DW_XPCS_ID,
@@ -1655,6 +1679,10 @@ static const struct dw_xpcs_desc xpcs_desc_list[] = {
 		.id = NXP_SJA1110_XPCS_ID,
 		.mask = DW_XPCS_ID_MASK,
 		.compat = nxp_sja1110_xpcs_compat,
+	}, {
+		.id = BT1_XGMAC_XPCS_ID,
+		.mask = DW_XPCS_ID_MASK,
+		.compat = bt1_xpcs_compat,
 	},
 };
 
diff --git a/include/linux/pcs/pcs-xpcs.h b/include/linux/pcs/pcs-xpcs.h
index 67d3d92bc4e0..e9f29dc33a46 100644
--- a/include/linux/pcs/pcs-xpcs.h
+++ b/include/linux/pcs/pcs-xpcs.h
@@ -24,6 +24,7 @@
 
 enum dw_xpcs_pcs_id {
 	DW_XPCS_ID_NATIVE = 0,
+	BT1_XGMAC_XPCS_ID,
 	NXP_SJA1105_XPCS_ID = 0x00000010,
 	NXP_SJA1110_XPCS_ID = 0x00000020,
 	DW_XPCS_ID = 0x7996ced0,