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net: pcs: add 2500BASEX support for Intel mGbE controller

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XPCS IP supports 2500BASEX as PHY interface. It is configured as
autonegotiation disable to cater for PHYs that does not supports 2500BASEX
autonegotiation.

v2: Add supported link speed masking.
v3: Restructure to introduce xpcs_config_2500basex() used to configure the
    xpcs for 2.5G speeds. Added 2500BASEX specific information for
    configuration.
v4: Fix indentation error

Signed-off-by: Voon Weifeng <weifeng.voon@intel.com>
Signed-off-by: Michael Sit Wei Hong <michael.wei.hong.sit@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Voon Weifeng 2021-06-08 11:51:57 +08:00 committed by David S. Miller
parent 597a68ce32
commit f27abde304
2 changed files with 57 additions and 0 deletions
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56
drivers/net/pcs/pcs-xpcs.c
View File

@ -57,9 +57,12 @@
/* Clause 37 Defines */
/* VR MII MMD registers offsets */
#define DW_VR_MII_MMD_CTRL 0x0000
#define DW_VR_MII_DIG_CTRL1 0x8000
#define DW_VR_MII_AN_CTRL 0x8001
#define DW_VR_MII_AN_INTR_STS 0x8002
/* Enable 2.5G Mode */
#define DW_VR_MII_DIG_CTRL1_2G5_EN BIT(2)
/* EEE Mode Control Register */
#define DW_VR_MII_EEE_MCTRL0 0x8006
#define DW_VR_MII_EEE_MCTRL1 0x800b
@ -86,6 +89,11 @@
#define DW_VR_MII_C37_ANSGM_SP_1000 0x2
#define DW_VR_MII_C37_ANSGM_SP_LNKSTS BIT(4)
/* SR MII MMD Control defines */
#define AN_CL37_EN BIT(12) /* Enable Clause 37 auto-nego */
#define SGMII_SPEED_SS13 BIT(13) /* SGMII speed along with SS6 */
#define SGMII_SPEED_SS6 BIT(6) /* SGMII speed along with SS13 */
/* VR MII EEE Control 0 defines */
#define DW_VR_MII_EEE_LTX_EN BIT(0) /* LPI Tx Enable */
#define DW_VR_MII_EEE_LRX_EN BIT(1) /* LPI Rx Enable */
@ -161,6 +169,14 @@ static const int xpcs_sgmii_features[] = {
__ETHTOOL_LINK_MODE_MASK_NBITS,
};
static const int xpcs_2500basex_features[] = {
ETHTOOL_LINK_MODE_Asym_Pause_BIT,
ETHTOOL_LINK_MODE_Autoneg_BIT,
ETHTOOL_LINK_MODE_2500baseX_Full_BIT,
ETHTOOL_LINK_MODE_2500baseT_Full_BIT,
__ETHTOOL_LINK_MODE_MASK_NBITS,
};
static const phy_interface_t xpcs_usxgmii_interfaces[] = {
PHY_INTERFACE_MODE_USXGMII,
};
@ -177,11 +193,17 @@ static const phy_interface_t xpcs_sgmii_interfaces[] = {
PHY_INTERFACE_MODE_SGMII,
};
static const phy_interface_t xpcs_2500basex_interfaces[] = {
PHY_INTERFACE_MODE_2500BASEX,
PHY_INTERFACE_MODE_MAX,
};
enum {
DW_XPCS_USXGMII,
DW_XPCS_10GKR,
DW_XPCS_XLGMII,
DW_XPCS_SGMII,
DW_XPCS_2500BASEX,
DW_XPCS_INTERFACE_MAX,
};
@ -306,6 +328,7 @@ static int xpcs_soft_reset(struct mdio_xpcs_args *xpcs,
dev = MDIO_MMD_PCS;
break;
case DW_AN_C37_SGMII:
case DW_2500BASEX:
dev = MDIO_MMD_VEND2;
break;
default:
@ -804,6 +827,28 @@ static int xpcs_config_aneg_c37_sgmii(struct mdio_xpcs_args *xpcs)
return xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1, ret);
}
static int xpcs_config_2500basex(struct mdio_xpcs_args *xpcs)
{
int ret;
ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1);
if (ret < 0)
return ret;
ret |= DW_VR_MII_DIG_CTRL1_2G5_EN;
ret &= ~DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW;
ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1, ret);
if (ret < 0)
return ret;
ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL);
if (ret < 0)
return ret;
ret &= ~AN_CL37_EN;
ret |= SGMII_SPEED_SS6;
ret &= ~SGMII_SPEED_SS13;
return xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL, ret);
}
static int xpcs_do_config(struct mdio_xpcs_args *xpcs,
phy_interface_t interface, unsigned int mode)
{
@ -827,6 +872,11 @@ static int xpcs_do_config(struct mdio_xpcs_args *xpcs,
if (ret)
return ret;
break;
case DW_2500BASEX:
ret = xpcs_config_2500basex(xpcs);
if (ret)
return ret;
break;
default:
return -1;
}
@ -1023,6 +1073,12 @@ static const struct xpcs_compat synopsys_xpcs_compat[DW_XPCS_INTERFACE_MAX] = {
.num_interfaces = ARRAY_SIZE(xpcs_sgmii_interfaces),
.an_mode = DW_AN_C37_SGMII,
},
[DW_XPCS_2500BASEX] = {
.supported = xpcs_2500basex_features,
.interface = xpcs_2500basex_interfaces,
.num_interfaces = ARRAY_SIZE(xpcs_2500basex_features),
.an_mode = DW_2500BASEX,
},
};
static const struct xpcs_id xpcs_id_list[] = {

1
include/linux/pcs/pcs-xpcs.h
View File

@ -13,6 +13,7 @@
/* AN mode */
#define DW_AN_C73 1
#define DW_AN_C37_SGMII 2
#define DW_2500BASEX 3
struct xpcs_id;