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Date: Sat, 25 Apr 2020 20:06:20 +0200
From: Andrew Lunn <andrew@...n.ch>
To: David Miller <davem@...emloft.net>
Cc: netdev <netdev@...r.kernel.org>,
Florian Fainelli <f.fainelli@...il.com>,
Heiner Kallweit <hkallweit1@...il.com>,
Chris Healy <cphealy@...il.com>,
Michal Kubecek <mkubecek@...e.cz>, Andrew Lunn <andrew@...n.ch>
Subject: [PATCH net-next v1 8/9] net: phy: marvell: Add cable test support
The Marvell PHYs have a couple of different register sets for
performing cable tests. Page 7 provides the simplest to use.
Signed-off-by: Andrew Lunn <andrew@...n.ch>
---
drivers/net/phy/marvell.c | 202 ++++++++++++++++++++++++++++++++++++++
1 file changed, 202 insertions(+)
diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
index 7fc8e10c5f33..7ad381ae4e49 100644
--- a/drivers/net/phy/marvell.c
+++ b/drivers/net/phy/marvell.c
@@ -27,6 +27,7 @@
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
+#include <linux/ethtool_netlink.h>
#include <linux/phy.h>
#include <linux/marvell_phy.h>
#include <linux/bitfield.h>
@@ -35,6 +36,7 @@
#include <linux/io.h>
#include <asm/irq.h>
#include <linux/uaccess.h>
+#include <uapi/linux/ethtool_netlink.h>
#define MII_MARVELL_PHY_PAGE 22
#define MII_MARVELL_COPPER_PAGE 0x00
@@ -42,6 +44,7 @@
#define MII_MARVELL_MSCR_PAGE 0x02
#define MII_MARVELL_LED_PAGE 0x03
#define MII_MARVELL_MISC_TEST_PAGE 0x06
+#define MII_MARVELL_VCT7_PAGE 0x07
#define MII_MARVELL_WOL_PAGE 0x11
#define MII_M1011_IEVENT 0x13
@@ -162,6 +165,36 @@
#define MII_88E1510_GEN_CTRL_REG_1_MODE_SGMII 0x1 /* SGMII to copper */
#define MII_88E1510_GEN_CTRL_REG_1_RESET 0x8000 /* Soft reset */
+#define MII_VCT7_PAIR_0_DISTANCE 0x10
+#define MII_VCT7_PAIR_1_DISTANCE 0x11
+#define MII_VCT7_PAIR_2_DISTANCE 0x12
+#define MII_VCT7_PAIR_3_DISTANCE 0x13
+
+#define MII_VCT7_RESULTS 0x14
+#define MII_VCT7_RESULTS_PAIR3_MASK 0xf000
+#define MII_VCT7_RESULTS_PAIR2_MASK 0x0f00
+#define MII_VCT7_RESULTS_PAIR1_MASK 0x00f0
+#define MII_VCT7_RESULTS_PAIR0_MASK 0x000f
+#define MII_VCT7_RESULTS_PAIR3_SHIFT 12
+#define MII_VCT7_RESULTS_PAIR2_SHIFT 8
+#define MII_VCT7_RESULTS_PAIR1_SHIFT 4
+#define MII_VCT7_RESULTS_PAIR0_SHIFT 0
+#define MII_VCT7_RESULTS_INVALID 0
+#define MII_VCT7_RESULTS_OK 1
+#define MII_VCT7_RESULTS_OPEN 2
+#define MII_VCT7_RESULTS_SAME_SHORT 3
+#define MII_VCT7_RESULTS_CROSS_SHORT 4
+#define MII_VCT7_RESULTS_BUSY 9
+
+#define MII_VCT7_CTRL 0x15
+#define MII_VCT7_CTRL_RUN_NOW BIT(15)
+#define MII_VCT7_CTRL_RUN_ANEG BIT(14)
+#define MII_VCT7_CTRL_DISABLE_CROSS BIT(13)
+#define MII_VCT7_CTRL_RUN_AFTER_BREAK_LINK BIT(12)
+#define MII_VCT7_CTRL_IN_PROGRESS BIT(11)
+#define MII_VCT7_CTRL_METERS BIT(10)
+#define MII_VCT7_CTRL_CENTIMETERS 0
+
#define LPA_PAUSE_FIBER 0x180
#define LPA_PAUSE_ASYM_FIBER 0x100
@@ -1658,6 +1691,163 @@ static void marvell_get_stats(struct phy_device *phydev,
data[i] = marvell_get_stat(phydev, i);
}
+static int marvell_vct7_cable_test_start(struct phy_device *phydev)
+{
+ int bmcr, bmsr, ret;
+
+ /* If auto-negotiation is enabled, but not complete, the cable
+ * test never completes. So disable auto-neg.
+ */
+ bmcr = phy_read(phydev, MII_BMCR);
+ if (bmcr < 0)
+ return bmcr;
+
+ bmsr = phy_read(phydev, MII_BMSR);
+
+ if (bmsr < 0)
+ return bmsr;
+
+ if (bmcr & BMCR_ANENABLE) {
+ ret = phy_modify(phydev, MII_BMCR, BMCR_ANENABLE, 0);
+ if (ret < 0)
+ return ret;
+ ret = genphy_soft_reset(phydev);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* If the link is up, allow it some time to go down */
+ if (bmsr & BMSR_LSTATUS)
+ msleep(1500);
+
+ return phy_write_paged(phydev, MII_MARVELL_VCT7_PAGE,
+ MII_VCT7_CTRL,
+ MII_VCT7_CTRL_RUN_NOW |
+ MII_VCT7_CTRL_CENTIMETERS);
+}
+
+static int marvell_vct7_distance_to_length(int distance, bool meter)
+{
+ if (meter)
+ distance *= 100;
+
+ return distance;
+}
+
+static bool marvell_vct7_distance_valid(int result)
+{
+ switch (result) {
+ case MII_VCT7_RESULTS_OPEN:
+ case MII_VCT7_RESULTS_SAME_SHORT:
+ case MII_VCT7_RESULTS_CROSS_SHORT:
+ return true;
+ }
+ return false;
+}
+
+static int marvell_vct7_report_length(struct phy_device *phydev,
+ int pair, bool meter)
+{
+ int length;
+ int ret;
+
+ ret = phy_read_paged(phydev, MII_MARVELL_VCT7_PAGE,
+ MII_VCT7_PAIR_0_DISTANCE + pair);
+ if (ret < 0)
+ return ret;
+
+ length = marvell_vct7_distance_to_length(ret, meter);
+
+ ethnl_cable_test_fault_length(phydev, pair, length);
+
+ return 0;
+}
+
+static int mavell_vct7_cable_test_report_trans(int result)
+{
+ switch (result) {
+ case MII_VCT7_RESULTS_OK:
+ return ETHTOOL_A_CABLE_RESULT_CODE_OK;
+ case MII_VCT7_RESULTS_OPEN:
+ return ETHTOOL_A_CABLE_RESULT_CODE_OPEN;
+ case MII_VCT7_RESULTS_SAME_SHORT:
+ return ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT;
+ case MII_VCT7_RESULTS_CROSS_SHORT:
+ return ETHTOOL_A_CABLE_RESULT_CODE_CROSS_SHORT;
+ default:
+ return ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC;
+ }
+}
+
+static int marvell_vct7_cable_test_report(struct phy_device *phydev)
+{
+ int pair0, pair1, pair2, pair3;
+ bool meter;
+ int ret;
+
+ ret = phy_read_paged(phydev, MII_MARVELL_VCT7_PAGE,
+ MII_VCT7_RESULTS);
+ if (ret < 0)
+ return ret;
+
+ pair3 = (ret & MII_VCT7_RESULTS_PAIR3_MASK) >>
+ MII_VCT7_RESULTS_PAIR3_SHIFT;
+ pair2 = (ret & MII_VCT7_RESULTS_PAIR2_MASK) >>
+ MII_VCT7_RESULTS_PAIR2_SHIFT;
+ pair1 = (ret & MII_VCT7_RESULTS_PAIR1_MASK) >>
+ MII_VCT7_RESULTS_PAIR1_SHIFT;
+ pair0 = (ret & MII_VCT7_RESULTS_PAIR0_MASK) >>
+ MII_VCT7_RESULTS_PAIR0_SHIFT;
+
+ ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_0,
+ mavell_vct7_cable_test_report_trans(pair0));
+ ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_1,
+ mavell_vct7_cable_test_report_trans(pair1));
+ ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_2,
+ mavell_vct7_cable_test_report_trans(pair2));
+ ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_3,
+ mavell_vct7_cable_test_report_trans(pair3));
+
+ ret = phy_read_paged(phydev, MII_MARVELL_VCT7_PAGE, MII_VCT7_CTRL);
+ if (ret < 0)
+ return ret;
+
+ meter = ret & MII_VCT7_CTRL_METERS;
+
+ if (marvell_vct7_distance_valid(pair0))
+ marvell_vct7_report_length(phydev, 0, meter);
+ if (marvell_vct7_distance_valid(pair1))
+ marvell_vct7_report_length(phydev, 1, meter);
+ if (marvell_vct7_distance_valid(pair2))
+ marvell_vct7_report_length(phydev, 2, meter);
+ if (marvell_vct7_distance_valid(pair3))
+ marvell_vct7_report_length(phydev, 3, meter);
+
+ return 0;
+}
+
+static int marvell_vct7_cable_test_get_status(struct phy_device *phydev,
+ bool *finished)
+{
+ int ret;
+
+ *finished = false;
+
+ ret = phy_read_paged(phydev, MII_MARVELL_VCT7_PAGE,
+ MII_VCT7_CTRL);
+
+ if (ret < 0)
+ return ret;
+
+ if (!(ret & MII_VCT7_CTRL_IN_PROGRESS)) {
+ *finished = true;
+
+ return marvell_vct7_cable_test_report(phydev);
+ }
+
+ return 0;
+}
+
#ifdef CONFIG_HWMON
static int m88e1121_get_temp(struct phy_device *phydev, long *temp)
{
@@ -2353,6 +2543,7 @@ static struct phy_driver marvell_drivers[] = {
.phy_id_mask = MARVELL_PHY_ID_MASK,
.name = "Marvell 88E1510",
.features = PHY_GBIT_FIBRE_FEATURES,
+ .flags = PHY_POLL_CABLE_TEST,
.probe = &m88e1510_probe,
.config_init = &m88e1510_config_init,
.config_aneg = &m88e1510_config_aneg,
@@ -2372,12 +2563,15 @@ static struct phy_driver marvell_drivers[] = {
.set_loopback = genphy_loopback,
.get_tunable = m88e1011_get_tunable,
.set_tunable = m88e1011_set_tunable,
+ .cable_test_start = marvell_vct7_cable_test_start,
+ .cable_test_get_status = marvell_vct7_cable_test_get_status,
},
{
.phy_id = MARVELL_PHY_ID_88E1540,
.phy_id_mask = MARVELL_PHY_ID_MASK,
.name = "Marvell 88E1540",
/* PHY_GBIT_FEATURES */
+ .flags = PHY_POLL_CABLE_TEST,
.probe = m88e1510_probe,
.config_init = &marvell_config_init,
.config_aneg = &m88e1510_config_aneg,
@@ -2394,6 +2588,8 @@ static struct phy_driver marvell_drivers[] = {
.get_stats = marvell_get_stats,
.get_tunable = m88e1540_get_tunable,
.set_tunable = m88e1540_set_tunable,
+ .cable_test_start = marvell_vct7_cable_test_start,
+ .cable_test_get_status = marvell_vct7_cable_test_get_status,
},
{
.phy_id = MARVELL_PHY_ID_88E1545,
@@ -2401,6 +2597,7 @@ static struct phy_driver marvell_drivers[] = {
.name = "Marvell 88E1545",
.probe = m88e1510_probe,
/* PHY_GBIT_FEATURES */
+ .flags = PHY_POLL_CABLE_TEST,
.config_init = &marvell_config_init,
.config_aneg = &m88e1510_config_aneg,
.read_status = &marvell_read_status,
@@ -2416,6 +2613,8 @@ static struct phy_driver marvell_drivers[] = {
.get_stats = marvell_get_stats,
.get_tunable = m88e1540_get_tunable,
.set_tunable = m88e1540_set_tunable,
+ .cable_test_start = marvell_vct7_cable_test_start,
+ .cable_test_get_status = marvell_vct7_cable_test_get_status,
},
{
.phy_id = MARVELL_PHY_ID_88E3016,
@@ -2442,6 +2641,7 @@ static struct phy_driver marvell_drivers[] = {
.phy_id_mask = MARVELL_PHY_ID_MASK,
.name = "Marvell 88E6390",
/* PHY_GBIT_FEATURES */
+ .flags = PHY_POLL_CABLE_TEST,
.probe = m88e6390_probe,
.config_init = &marvell_config_init,
.config_aneg = &m88e6390_config_aneg,
@@ -2458,6 +2658,8 @@ static struct phy_driver marvell_drivers[] = {
.get_stats = marvell_get_stats,
.get_tunable = m88e1540_get_tunable,
.set_tunable = m88e1540_set_tunable,
+ .cable_test_start = marvell_vct7_cable_test_start,
+ .cable_test_get_status = marvell_vct7_cable_test_get_status,
},
};
--
2.26.1
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