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Merge branch 'net-phy-broadcom-cable-tester-support'
Michael Walle says: ==================== net: phy: broadcom: cable tester support Add cable tester support for the Broadcom PHYs. Support for it was developed on a BCM54140 Quad PHY which RDB register access. If there is a link partner the results are not as good as with an open cable. I guess we could retry if the measurement until all pairs had at least one valid result. changes since v1: - added Reviewed-by: tags - removed "div by 2" for cross shorts, just mention it in the commit message. The results are inconclusive if the tests are repeated. So just report the length as is for now. - fixed typo in commit message ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
commit
87f785e962
@ -4,45 +4,103 @@
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*/
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#include "bcm-phy-lib.h"
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#include <linux/bitfield.h>
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#include <linux/brcmphy.h>
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#include <linux/export.h>
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#include <linux/mdio.h>
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#include <linux/module.h>
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#include <linux/phy.h>
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#include <linux/ethtool.h>
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#include <linux/ethtool_netlink.h>
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#define MII_BCM_CHANNEL_WIDTH 0x2000
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#define BCM_CL45VEN_EEE_ADV 0x3c
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int __bcm_phy_write_exp(struct phy_device *phydev, u16 reg, u16 val)
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{
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int rc;
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rc = __phy_write(phydev, MII_BCM54XX_EXP_SEL, reg);
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if (rc < 0)
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return rc;
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return __phy_write(phydev, MII_BCM54XX_EXP_DATA, val);
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}
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EXPORT_SYMBOL_GPL(__bcm_phy_write_exp);
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int bcm_phy_write_exp(struct phy_device *phydev, u16 reg, u16 val)
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{
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int rc;
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rc = phy_write(phydev, MII_BCM54XX_EXP_SEL, reg);
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if (rc < 0)
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return rc;
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phy_lock_mdio_bus(phydev);
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rc = __bcm_phy_write_exp(phydev, reg, val);
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phy_unlock_mdio_bus(phydev);
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return phy_write(phydev, MII_BCM54XX_EXP_DATA, val);
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return rc;
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}
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EXPORT_SYMBOL_GPL(bcm_phy_write_exp);
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int bcm_phy_read_exp(struct phy_device *phydev, u16 reg)
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int __bcm_phy_read_exp(struct phy_device *phydev, u16 reg)
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{
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int val;
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val = phy_write(phydev, MII_BCM54XX_EXP_SEL, reg);
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val = __phy_write(phydev, MII_BCM54XX_EXP_SEL, reg);
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if (val < 0)
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return val;
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val = phy_read(phydev, MII_BCM54XX_EXP_DATA);
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val = __phy_read(phydev, MII_BCM54XX_EXP_DATA);
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/* Restore default value. It's O.K. if this write fails. */
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phy_write(phydev, MII_BCM54XX_EXP_SEL, 0);
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__phy_write(phydev, MII_BCM54XX_EXP_SEL, 0);
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return val;
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}
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EXPORT_SYMBOL_GPL(__bcm_phy_read_exp);
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int bcm_phy_read_exp(struct phy_device *phydev, u16 reg)
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{
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int rc;
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phy_lock_mdio_bus(phydev);
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rc = __bcm_phy_read_exp(phydev, reg);
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phy_unlock_mdio_bus(phydev);
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return rc;
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}
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EXPORT_SYMBOL_GPL(bcm_phy_read_exp);
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int __bcm_phy_modify_exp(struct phy_device *phydev, u16 reg, u16 mask, u16 set)
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{
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int new, ret;
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ret = __phy_write(phydev, MII_BCM54XX_EXP_SEL, reg);
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if (ret < 0)
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return ret;
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ret = __phy_read(phydev, MII_BCM54XX_EXP_DATA);
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if (ret < 0)
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return ret;
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new = (ret & ~mask) | set;
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if (new == ret)
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return 0;
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return __phy_write(phydev, MII_BCM54XX_EXP_DATA, new);
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}
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EXPORT_SYMBOL_GPL(__bcm_phy_modify_exp);
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int bcm_phy_modify_exp(struct phy_device *phydev, u16 reg, u16 mask, u16 set)
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{
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int ret;
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phy_lock_mdio_bus(phydev);
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ret = __bcm_phy_modify_exp(phydev, reg, mask, set);
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phy_unlock_mdio_bus(phydev);
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return ret;
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}
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EXPORT_SYMBOL_GPL(bcm_phy_modify_exp);
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int bcm54xx_auxctl_read(struct phy_device *phydev, u16 regnum)
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{
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/* The register must be written to both the Shadow Register Select and
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@ -525,6 +583,193 @@ int bcm_phy_enable_jumbo(struct phy_device *phydev)
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}
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EXPORT_SYMBOL_GPL(bcm_phy_enable_jumbo);
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int __bcm_phy_enable_rdb_access(struct phy_device *phydev)
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{
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return __bcm_phy_write_exp(phydev, BCM54XX_EXP_REG7E, 0);
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}
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EXPORT_SYMBOL_GPL(__bcm_phy_enable_rdb_access);
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int __bcm_phy_enable_legacy_access(struct phy_device *phydev)
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{
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return __bcm_phy_write_rdb(phydev, BCM54XX_RDB_REG0087,
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BCM54XX_ACCESS_MODE_LEGACY_EN);
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}
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EXPORT_SYMBOL_GPL(__bcm_phy_enable_legacy_access);
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static int _bcm_phy_cable_test_start(struct phy_device *phydev, bool is_rdb)
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{
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u16 mask, set;
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int ret;
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/* Auto-negotiation must be enabled for cable diagnostics to work, but
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* don't advertise any capabilities.
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*/
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phy_write(phydev, MII_BMCR, BMCR_ANENABLE);
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phy_write(phydev, MII_ADVERTISE, ADVERTISE_CSMA);
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phy_write(phydev, MII_CTRL1000, 0);
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phy_lock_mdio_bus(phydev);
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if (is_rdb) {
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ret = __bcm_phy_enable_legacy_access(phydev);
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if (ret)
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goto out;
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}
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mask = BCM54XX_ECD_CTRL_CROSS_SHORT_DIS | BCM54XX_ECD_CTRL_UNIT_MASK;
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set = BCM54XX_ECD_CTRL_RUN | BCM54XX_ECD_CTRL_BREAK_LINK |
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FIELD_PREP(BCM54XX_ECD_CTRL_UNIT_MASK,
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BCM54XX_ECD_CTRL_UNIT_CM);
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ret = __bcm_phy_modify_exp(phydev, BCM54XX_EXP_ECD_CTRL, mask, set);
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out:
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/* re-enable the RDB access even if there was an error */
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if (is_rdb)
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ret = __bcm_phy_enable_rdb_access(phydev) ? : ret;
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phy_unlock_mdio_bus(phydev);
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return ret;
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}
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static int bcm_phy_cable_test_report_trans(int result)
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{
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switch (result) {
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case BCM54XX_ECD_FAULT_TYPE_OK:
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return ETHTOOL_A_CABLE_RESULT_CODE_OK;
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case BCM54XX_ECD_FAULT_TYPE_OPEN:
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return ETHTOOL_A_CABLE_RESULT_CODE_OPEN;
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case BCM54XX_ECD_FAULT_TYPE_SAME_SHORT:
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return ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT;
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case BCM54XX_ECD_FAULT_TYPE_CROSS_SHORT:
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return ETHTOOL_A_CABLE_RESULT_CODE_CROSS_SHORT;
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case BCM54XX_ECD_FAULT_TYPE_INVALID:
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case BCM54XX_ECD_FAULT_TYPE_BUSY:
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default:
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return ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC;
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}
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}
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static bool bcm_phy_distance_valid(int result)
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{
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switch (result) {
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case BCM54XX_ECD_FAULT_TYPE_OPEN:
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case BCM54XX_ECD_FAULT_TYPE_SAME_SHORT:
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case BCM54XX_ECD_FAULT_TYPE_CROSS_SHORT:
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return true;
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}
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return false;
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}
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static int bcm_phy_report_length(struct phy_device *phydev, int pair)
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{
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int val;
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val = __bcm_phy_read_exp(phydev,
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BCM54XX_EXP_ECD_PAIR_A_LENGTH_RESULTS + pair);
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if (val < 0)
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return val;
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if (val == BCM54XX_ECD_LENGTH_RESULTS_INVALID)
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return 0;
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ethnl_cable_test_fault_length(phydev, pair, val);
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return 0;
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}
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static int _bcm_phy_cable_test_get_status(struct phy_device *phydev,
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bool *finished, bool is_rdb)
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{
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int pair_a, pair_b, pair_c, pair_d, ret;
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*finished = false;
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phy_lock_mdio_bus(phydev);
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if (is_rdb) {
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ret = __bcm_phy_enable_legacy_access(phydev);
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if (ret)
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goto out;
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}
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ret = __bcm_phy_read_exp(phydev, BCM54XX_EXP_ECD_CTRL);
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if (ret < 0)
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goto out;
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if (ret & BCM54XX_ECD_CTRL_IN_PROGRESS) {
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ret = 0;
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goto out;
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}
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ret = __bcm_phy_read_exp(phydev, BCM54XX_EXP_ECD_FAULT_TYPE);
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if (ret < 0)
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goto out;
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pair_a = FIELD_GET(BCM54XX_ECD_FAULT_TYPE_PAIR_A_MASK, ret);
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pair_b = FIELD_GET(BCM54XX_ECD_FAULT_TYPE_PAIR_B_MASK, ret);
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pair_c = FIELD_GET(BCM54XX_ECD_FAULT_TYPE_PAIR_C_MASK, ret);
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pair_d = FIELD_GET(BCM54XX_ECD_FAULT_TYPE_PAIR_D_MASK, ret);
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ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_A,
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bcm_phy_cable_test_report_trans(pair_a));
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ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_B,
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bcm_phy_cable_test_report_trans(pair_b));
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ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_C,
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bcm_phy_cable_test_report_trans(pair_c));
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ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_D,
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bcm_phy_cable_test_report_trans(pair_d));
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if (bcm_phy_distance_valid(pair_a))
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bcm_phy_report_length(phydev, 0);
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if (bcm_phy_distance_valid(pair_b))
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bcm_phy_report_length(phydev, 1);
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if (bcm_phy_distance_valid(pair_c))
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bcm_phy_report_length(phydev, 2);
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if (bcm_phy_distance_valid(pair_d))
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bcm_phy_report_length(phydev, 3);
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ret = 0;
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*finished = true;
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out:
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/* re-enable the RDB access even if there was an error */
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if (is_rdb)
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ret = __bcm_phy_enable_rdb_access(phydev) ? : ret;
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phy_unlock_mdio_bus(phydev);
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return ret;
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}
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int bcm_phy_cable_test_start(struct phy_device *phydev)
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{
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return _bcm_phy_cable_test_start(phydev, false);
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}
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EXPORT_SYMBOL_GPL(bcm_phy_cable_test_start);
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int bcm_phy_cable_test_get_status(struct phy_device *phydev, bool *finished)
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{
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return _bcm_phy_cable_test_get_status(phydev, finished, false);
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}
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EXPORT_SYMBOL_GPL(bcm_phy_cable_test_get_status);
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/* We assume that all PHYs which support RDB access can be switched to legacy
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* mode. If, in the future, this is not true anymore, we have to re-implement
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* this with RDB access.
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*/
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int bcm_phy_cable_test_start_rdb(struct phy_device *phydev)
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{
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return _bcm_phy_cable_test_start(phydev, true);
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}
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EXPORT_SYMBOL_GPL(bcm_phy_cable_test_start_rdb);
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int bcm_phy_cable_test_get_status_rdb(struct phy_device *phydev,
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bool *finished)
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{
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return _bcm_phy_cable_test_get_status(phydev, finished, true);
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}
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EXPORT_SYMBOL_GPL(bcm_phy_cable_test_get_status_rdb);
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MODULE_DESCRIPTION("Broadcom PHY Library");
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Broadcom Corporation");
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@ -27,8 +27,12 @@
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#define AFE_HPF_TRIM_OTHERS MISC_ADDR(0x3a, 0)
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int __bcm_phy_write_exp(struct phy_device *phydev, u16 reg, u16 val);
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int __bcm_phy_read_exp(struct phy_device *phydev, u16 reg);
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int __bcm_phy_modify_exp(struct phy_device *phydev, u16 reg, u16 mask, u16 set);
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int bcm_phy_write_exp(struct phy_device *phydev, u16 reg, u16 val);
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int bcm_phy_read_exp(struct phy_device *phydev, u16 reg);
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int bcm_phy_modify_exp(struct phy_device *phydev, u16 reg, u16 mask, u16 set);
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static inline int bcm_phy_write_exp_sel(struct phy_device *phydev,
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u16 reg, u16 val)
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@ -76,4 +80,10 @@ void bcm_phy_r_rc_cal_reset(struct phy_device *phydev);
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int bcm_phy_28nm_a0b0_afe_config_init(struct phy_device *phydev);
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int bcm_phy_enable_jumbo(struct phy_device *phydev);
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int bcm_phy_cable_test_get_status_rdb(struct phy_device *phydev,
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bool *finished);
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int bcm_phy_cable_test_start_rdb(struct phy_device *phydev);
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int bcm_phy_cable_test_start(struct phy_device *phydev);
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int bcm_phy_cable_test_get_status(struct phy_device *phydev, bool *finished);
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#endif /* _LINUX_BCM_PHY_LIB_H */
|
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|
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@ -831,6 +831,7 @@ static struct phy_driver bcm54140_drivers[] = {
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.phy_id = PHY_ID_BCM54140,
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.phy_id_mask = BCM54140_PHY_ID_MASK,
|
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.name = "Broadcom BCM54140",
|
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.flags = PHY_POLL_CABLE_TEST,
|
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.features = PHY_GBIT_FEATURES,
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.config_init = bcm54140_config_init,
|
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.did_interrupt = bcm54140_did_interrupt,
|
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@ -842,6 +843,8 @@ static struct phy_driver bcm54140_drivers[] = {
|
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.soft_reset = genphy_soft_reset,
|
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.get_tunable = bcm54140_get_tunable,
|
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.set_tunable = bcm54140_set_tunable,
|
||||
.cable_test_start = bcm_phy_cable_test_start_rdb,
|
||||
.cable_test_get_status = bcm_phy_cable_test_get_status_rdb,
|
||||
},
|
||||
};
|
||||
module_phy_driver(bcm54140_drivers);
|
||||
|
||||
@ -119,6 +119,11 @@
|
||||
#define MII_BCM54XX_RDB_ADDR 0x1e
|
||||
#define MII_BCM54XX_RDB_DATA 0x1f
|
||||
|
||||
/* legacy access control via rdb/expansion register */
|
||||
#define BCM54XX_RDB_REG0087 0x0087
|
||||
#define BCM54XX_EXP_REG7E (MII_BCM54XX_EXP_SEL_ER + 0x7E)
|
||||
#define BCM54XX_ACCESS_MODE_LEGACY_EN BIT(15)
|
||||
|
||||
/*
|
||||
* AUXILIARY CONTROL SHADOW ACCESS REGISTERS. (PHY REG 0x18)
|
||||
*/
|
||||
@ -294,4 +299,51 @@
|
||||
#define MII_BRCM_CORE_EXPB0 0xB0
|
||||
#define MII_BRCM_CORE_EXPB1 0xB1
|
||||
|
||||
/* Enhanced Cable Diagnostics */
|
||||
#define BCM54XX_RDB_ECD_CTRL 0x2a0
|
||||
#define BCM54XX_EXP_ECD_CTRL (MII_BCM54XX_EXP_SEL_ER + 0xc0)
|
||||
|
||||
#define BCM54XX_ECD_CTRL_CABLE_TYPE_CAT3 1 /* CAT3 or worse */
|
||||
#define BCM54XX_ECD_CTRL_CABLE_TYPE_CAT5 0 /* CAT5 or better */
|
||||
#define BCM54XX_ECD_CTRL_CABLE_TYPE_MASK BIT(0) /* cable type */
|
||||
#define BCM54XX_ECD_CTRL_INVALID BIT(3) /* invalid result */
|
||||
#define BCM54XX_ECD_CTRL_UNIT_CM 0 /* centimeters */
|
||||
#define BCM54XX_ECD_CTRL_UNIT_M 1 /* meters */
|
||||
#define BCM54XX_ECD_CTRL_UNIT_MASK BIT(10) /* cable length unit */
|
||||
#define BCM54XX_ECD_CTRL_IN_PROGRESS BIT(11) /* test in progress */
|
||||
#define BCM54XX_ECD_CTRL_BREAK_LINK BIT(12) /* unconnect link
|
||||
* during test
|
||||
*/
|
||||
#define BCM54XX_ECD_CTRL_CROSS_SHORT_DIS BIT(13) /* disable inter-pair
|
||||
* short check
|
||||
*/
|
||||
#define BCM54XX_ECD_CTRL_RUN BIT(15) /* run immediate */
|
||||
|
||||
#define BCM54XX_RDB_ECD_FAULT_TYPE 0x2a1
|
||||
#define BCM54XX_EXP_ECD_FAULT_TYPE (MII_BCM54XX_EXP_SEL_ER + 0xc1)
|
||||
#define BCM54XX_ECD_FAULT_TYPE_INVALID 0x0
|
||||
#define BCM54XX_ECD_FAULT_TYPE_OK 0x1
|
||||
#define BCM54XX_ECD_FAULT_TYPE_OPEN 0x2
|
||||
#define BCM54XX_ECD_FAULT_TYPE_SAME_SHORT 0x3 /* short same pair */
|
||||
#define BCM54XX_ECD_FAULT_TYPE_CROSS_SHORT 0x4 /* short different pairs */
|
||||
#define BCM54XX_ECD_FAULT_TYPE_BUSY 0x9
|
||||
#define BCM54XX_ECD_FAULT_TYPE_PAIR_D_MASK GENMASK(3, 0)
|
||||
#define BCM54XX_ECD_FAULT_TYPE_PAIR_C_MASK GENMASK(7, 4)
|
||||
#define BCM54XX_ECD_FAULT_TYPE_PAIR_B_MASK GENMASK(11, 8)
|
||||
#define BCM54XX_ECD_FAULT_TYPE_PAIR_A_MASK GENMASK(15, 12)
|
||||
#define BCM54XX_ECD_PAIR_A_LENGTH_RESULTS 0x2a2
|
||||
#define BCM54XX_ECD_PAIR_B_LENGTH_RESULTS 0x2a3
|
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#define BCM54XX_ECD_PAIR_C_LENGTH_RESULTS 0x2a4
|
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#define BCM54XX_ECD_PAIR_D_LENGTH_RESULTS 0x2a5
|
||||
|
||||
#define BCM54XX_RDB_ECD_PAIR_A_LENGTH_RESULTS 0x2a2
|
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#define BCM54XX_EXP_ECD_PAIR_A_LENGTH_RESULTS (MII_BCM54XX_EXP_SEL_ER + 0xc2)
|
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#define BCM54XX_RDB_ECD_PAIR_B_LENGTH_RESULTS 0x2a3
|
||||
#define BCM54XX_EXP_ECD_PAIR_B_LENGTH_RESULTS (MII_BCM54XX_EXP_SEL_ER + 0xc3)
|
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#define BCM54XX_RDB_ECD_PAIR_C_LENGTH_RESULTS 0x2a4
|
||||
#define BCM54XX_EXP_ECD_PAIR_C_LENGTH_RESULTS (MII_BCM54XX_EXP_SEL_ER + 0xc4)
|
||||
#define BCM54XX_RDB_ECD_PAIR_D_LENGTH_RESULTS 0x2a5
|
||||
#define BCM54XX_EXP_ECD_PAIR_D_LENGTH_RESULTS (MII_BCM54XX_EXP_SEL_ER + 0xc5)
|
||||
#define BCM54XX_ECD_LENGTH_RESULTS_INVALID 0xffff
|
||||
|
||||
#endif /* _LINUX_BRCMPHY_H */
|
||||
|
||||
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Reference in New Issue
Block a user