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authorRussell King <rmk+kernel@armlinux.org.uk>2019-11-29 21:41:56 +0000
committerRussell King (Oracle) <rmk+kernel@armlinux.org.uk>2021-09-19 13:22:12 +0100
commit7e7049505ce1354295c5d543e06dfb417e997583 (patch)
treeb1bcf4791e6891b0f701b832735ea439bda44251
parentb823238b0d4a57a7d1ba73fe52cf668a5a47749e (diff)
net: phy: marvell10g: add downshift tunable support
Add support for the downshift tunable for the Marvell 88x3310 PHY. Downshift is only usable with firmware 0.3.5.0 and later. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
-rw-r--r--drivers/net/phy/marvell10g.c101
1 files changed, 100 insertions, 1 deletions
diff --git a/drivers/net/phy/marvell10g.c b/drivers/net/phy/marvell10g.c
index 53a433442803..e1ccb2acae84 100644
--- a/drivers/net/phy/marvell10g.c
+++ b/drivers/net/phy/marvell10g.c
@@ -22,6 +22,7 @@
* If both the fiber and copper ports are connected, the first to gain
* link takes priority and the other port is completely locked out.
*/
+#include <linux/bitfield.h>
#include <linux/ctype.h>
#include <linux/delay.h>
#include <linux/hwmon.h>
@@ -32,6 +33,8 @@
#define MV_PHY_ALASKA_NBT_QUIRK_MASK 0xfffffffe
#define MV_PHY_ALASKA_NBT_QUIRK_REV (MARVELL_PHY_ID_88X3310 | 0xa)
+#define MV_VERSION(a,b,c,d) ((a) << 24 | (b) << 16 | (c) << 8 | (d))
+
enum {
MV_PMA_FW_VER0 = 0xc011,
MV_PMA_FW_VER1 = 0xc012,
@@ -61,6 +64,15 @@ enum {
MV_PCS_CSCR1_MDIX_MDIX = 0x0020,
MV_PCS_CSCR1_MDIX_AUTO = 0x0060,
+ MV_PCS_DSC1 = 0x8003,
+ MV_PCS_DSC1_ENABLE = BIT(9),
+ MV_PCS_DSC1_10GBT = 0x01c0,
+ MV_PCS_DSC1_1GBR = 0x0038,
+ MV_PCS_DSC1_100BTX = 0x0007,
+ MV_PCS_DSC2 = 0x8004,
+ MV_PCS_DSC2_2P5G = 0xf000,
+ MV_PCS_DSC2_5G = 0x0f00,
+
MV_PCS_CSSR1 = 0x8008,
MV_PCS_CSSR1_SPD1_MASK = 0xc000,
MV_PCS_CSSR1_SPD1_SPD2 = 0xc000,
@@ -114,6 +126,7 @@ enum {
};
struct mv3310_chip {
+ bool (*has_downshift)(struct phy_device *phydev);
void (*init_supported_interfaces)(unsigned long *mask);
int (*get_mactype)(struct phy_device *phydev);
int (*init_interface)(struct phy_device *phydev, int mactype);
@@ -127,6 +140,7 @@ struct mv3310_priv {
DECLARE_BITMAP(supported_interfaces, PHY_INTERFACE_MODE_MAX);
u32 firmware_ver;
+ bool has_downshift;
bool rate_match;
phy_interface_t const_interface;
@@ -319,6 +333,65 @@ static int mv3310_reset(struct phy_device *phydev, u32 unit)
5000, 100000, true);
}
+static int mv3310_get_downshift(struct phy_device *phydev, u8 *ds)
+{
+ struct mv3310_priv *priv = dev_get_drvdata(&phydev->mdio.dev);
+ int val;
+
+ if (!priv->has_downshift)
+ return -EOPNOTSUPP;
+
+ val = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_PCS_DSC1);
+ if (val < 0)
+ return val;
+
+ if (val & MV_PCS_DSC1_ENABLE)
+ /* assume that all fields are the same */
+ *ds = 1 + FIELD_GET(MV_PCS_DSC1_10GBT, (u16)val);
+ else
+ *ds = DOWNSHIFT_DEV_DISABLE;
+
+ return 0;
+}
+
+static int mv3310_set_downshift(struct phy_device *phydev, u8 ds)
+{
+ struct mv3310_priv *priv = dev_get_drvdata(&phydev->mdio.dev);
+ u16 val;
+ int err;
+
+ if (!priv->has_downshift)
+ return -EOPNOTSUPP;
+
+ if (ds == DOWNSHIFT_DEV_DISABLE)
+ return phy_clear_bits_mmd(phydev, MDIO_MMD_PCS, MV_PCS_DSC1,
+ MV_PCS_DSC1_ENABLE);
+
+ /* FIXME: The default is disabled, so should we disable? */
+ if (ds == DOWNSHIFT_DEV_DEFAULT_COUNT)
+ ds = 2;
+
+ if (ds > 8)
+ return -E2BIG;
+
+ ds -= 1;
+ val = FIELD_PREP(MV_PCS_DSC2_2P5G, ds);
+ val |= FIELD_PREP(MV_PCS_DSC2_5G, ds);
+ err = phy_modify_mmd(phydev, MDIO_MMD_PCS, MV_PCS_DSC2,
+ MV_PCS_DSC2_2P5G | MV_PCS_DSC2_5G, val);
+ if (err < 0)
+ return err;
+
+ val = MV_PCS_DSC1_ENABLE;
+ val |= FIELD_PREP(MV_PCS_DSC1_10GBT, ds);
+ val |= FIELD_PREP(MV_PCS_DSC1_1GBR, ds);
+ val |= FIELD_PREP(MV_PCS_DSC1_100BTX, ds);
+
+ return phy_modify_mmd(phydev, MDIO_MMD_PCS, MV_PCS_DSC1,
+ MV_PCS_DSC1_ENABLE | MV_PCS_DSC1_10GBT |
+ MV_PCS_DSC1_1GBR | MV_PCS_DSC1_100BTX, val);
+}
+
static int mv3310_get_edpd(struct phy_device *phydev, u16 *edpd)
{
int val;
@@ -437,6 +510,9 @@ static int mv3310_probe(struct phy_device *phydev)
priv->firmware_ver >> 24, (priv->firmware_ver >> 16) & 255,
(priv->firmware_ver >> 8) & 255, priv->firmware_ver & 255);
+ if (chip->has_downshift)
+ priv->has_downshift = chip->has_downshift(phydev);
+
/* Powering down the port when not in use saves about 600mW */
ret = mv3310_power_down(phydev);
if (ret)
@@ -605,7 +681,16 @@ static int mv3310_config_init(struct phy_device *phydev)
}
/* Enable EDPD mode - saving 600mW */
- return mv3310_set_edpd(phydev, ETHTOOL_PHY_EDPD_DFLT_TX_MSECS);
+ err = mv3310_set_edpd(phydev, ETHTOOL_PHY_EDPD_DFLT_TX_MSECS);
+ if (err)
+ return err;
+
+ /* Allow downshift */
+ err = mv3310_set_downshift(phydev, DOWNSHIFT_DEV_DEFAULT_COUNT);
+ if (err && err != -EOPNOTSUPP)
+ return err;
+
+ return 0;
}
static int mv3310_get_features(struct phy_device *phydev)
@@ -875,6 +960,8 @@ static int mv3310_get_tunable(struct phy_device *phydev,
struct ethtool_tunable *tuna, void *data)
{
switch (tuna->id) {
+ case ETHTOOL_PHY_DOWNSHIFT:
+ return mv3310_get_downshift(phydev, data);
case ETHTOOL_PHY_EDPD:
return mv3310_get_edpd(phydev, data);
default:
@@ -886,6 +973,8 @@ static int mv3310_set_tunable(struct phy_device *phydev,
struct ethtool_tunable *tuna, const void *data)
{
switch (tuna->id) {
+ case ETHTOOL_PHY_DOWNSHIFT:
+ return mv3310_set_downshift(phydev, *(u8 *)data);
case ETHTOOL_PHY_EDPD:
return mv3310_set_edpd(phydev, *(u16 *)data);
default:
@@ -893,6 +982,14 @@ static int mv3310_set_tunable(struct phy_device *phydev,
}
}
+static bool mv3310_has_downshift(struct phy_device *phydev)
+{
+ struct mv3310_priv *priv = dev_get_drvdata(&phydev->mdio.dev);
+
+ /* Fails to downshift with firmware older than v0.3.5.0 */
+ return priv->firmware_ver >= MV_VERSION(0,3,5,0);
+}
+
static void mv3310_init_supported_interfaces(unsigned long *mask)
{
__set_bit(PHY_INTERFACE_MODE_SGMII, mask);
@@ -932,6 +1029,7 @@ static void mv2111_init_supported_interfaces(unsigned long *mask)
}
static const struct mv3310_chip mv3310_type = {
+ .has_downshift = mv3310_has_downshift,
.init_supported_interfaces = mv3310_init_supported_interfaces,
.get_mactype = mv3310_get_mactype,
.init_interface = mv3310_init_interface,
@@ -942,6 +1040,7 @@ static const struct mv3310_chip mv3310_type = {
};
static const struct mv3310_chip mv3340_type = {
+ .has_downshift = mv3310_has_downshift,
.init_supported_interfaces = mv3340_init_supported_interfaces,
.get_mactype = mv3310_get_mactype,
.init_interface = mv3340_init_interface,