898 строки
25 KiB
C
898 строки
25 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Core PHY library, taken from phy.c
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*/
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#include <linux/export.h>
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#include <linux/phy.h>
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#include <linux/of.h>
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const char *phy_speed_to_str(int speed)
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{
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BUILD_BUG_ON_MSG(__ETHTOOL_LINK_MODE_MASK_NBITS != 90,
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"Enum ethtool_link_mode_bit_indices and phylib are out of sync. "
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"If a speed or mode has been added please update phy_speed_to_str "
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"and the PHY settings array.\n");
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switch (speed) {
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case SPEED_10:
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return "10Mbps";
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case SPEED_100:
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return "100Mbps";
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case SPEED_1000:
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return "1Gbps";
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case SPEED_2500:
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return "2.5Gbps";
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case SPEED_5000:
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return "5Gbps";
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case SPEED_10000:
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return "10Gbps";
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case SPEED_14000:
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return "14Gbps";
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case SPEED_20000:
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return "20Gbps";
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case SPEED_25000:
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return "25Gbps";
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case SPEED_40000:
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return "40Gbps";
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case SPEED_50000:
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return "50Gbps";
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case SPEED_56000:
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return "56Gbps";
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case SPEED_100000:
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return "100Gbps";
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case SPEED_200000:
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return "200Gbps";
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case SPEED_400000:
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return "400Gbps";
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case SPEED_UNKNOWN:
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return "Unknown";
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default:
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return "Unsupported (update phy-core.c)";
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}
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}
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EXPORT_SYMBOL_GPL(phy_speed_to_str);
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const char *phy_duplex_to_str(unsigned int duplex)
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{
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if (duplex == DUPLEX_HALF)
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return "Half";
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if (duplex == DUPLEX_FULL)
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return "Full";
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if (duplex == DUPLEX_UNKNOWN)
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return "Unknown";
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return "Unsupported (update phy-core.c)";
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}
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EXPORT_SYMBOL_GPL(phy_duplex_to_str);
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/* A mapping of all SUPPORTED settings to speed/duplex. This table
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* must be grouped by speed and sorted in descending match priority
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* - iow, descending speed. */
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#define PHY_SETTING(s, d, b) { .speed = SPEED_ ## s, .duplex = DUPLEX_ ## d, \
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.bit = ETHTOOL_LINK_MODE_ ## b ## _BIT}
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static const struct phy_setting settings[] = {
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/* 400G */
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PHY_SETTING( 400000, FULL, 400000baseCR8_Full ),
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PHY_SETTING( 400000, FULL, 400000baseKR8_Full ),
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PHY_SETTING( 400000, FULL, 400000baseLR8_ER8_FR8_Full ),
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PHY_SETTING( 400000, FULL, 400000baseDR8_Full ),
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PHY_SETTING( 400000, FULL, 400000baseSR8_Full ),
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PHY_SETTING( 400000, FULL, 400000baseCR4_Full ),
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PHY_SETTING( 400000, FULL, 400000baseKR4_Full ),
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PHY_SETTING( 400000, FULL, 400000baseLR4_ER4_FR4_Full ),
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PHY_SETTING( 400000, FULL, 400000baseDR4_Full ),
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PHY_SETTING( 400000, FULL, 400000baseSR4_Full ),
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/* 200G */
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PHY_SETTING( 200000, FULL, 200000baseCR4_Full ),
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PHY_SETTING( 200000, FULL, 200000baseKR4_Full ),
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PHY_SETTING( 200000, FULL, 200000baseLR4_ER4_FR4_Full ),
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PHY_SETTING( 200000, FULL, 200000baseDR4_Full ),
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PHY_SETTING( 200000, FULL, 200000baseSR4_Full ),
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PHY_SETTING( 200000, FULL, 200000baseCR2_Full ),
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PHY_SETTING( 200000, FULL, 200000baseKR2_Full ),
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PHY_SETTING( 200000, FULL, 200000baseLR2_ER2_FR2_Full ),
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PHY_SETTING( 200000, FULL, 200000baseDR2_Full ),
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PHY_SETTING( 200000, FULL, 200000baseSR2_Full ),
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/* 100G */
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PHY_SETTING( 100000, FULL, 100000baseCR4_Full ),
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PHY_SETTING( 100000, FULL, 100000baseKR4_Full ),
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PHY_SETTING( 100000, FULL, 100000baseLR4_ER4_Full ),
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PHY_SETTING( 100000, FULL, 100000baseSR4_Full ),
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PHY_SETTING( 100000, FULL, 100000baseCR2_Full ),
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PHY_SETTING( 100000, FULL, 100000baseKR2_Full ),
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PHY_SETTING( 100000, FULL, 100000baseLR2_ER2_FR2_Full ),
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PHY_SETTING( 100000, FULL, 100000baseDR2_Full ),
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PHY_SETTING( 100000, FULL, 100000baseSR2_Full ),
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PHY_SETTING( 100000, FULL, 100000baseCR_Full ),
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PHY_SETTING( 100000, FULL, 100000baseKR_Full ),
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PHY_SETTING( 100000, FULL, 100000baseLR_ER_FR_Full ),
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PHY_SETTING( 100000, FULL, 100000baseDR_Full ),
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PHY_SETTING( 100000, FULL, 100000baseSR_Full ),
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/* 56G */
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PHY_SETTING( 56000, FULL, 56000baseCR4_Full ),
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PHY_SETTING( 56000, FULL, 56000baseKR4_Full ),
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PHY_SETTING( 56000, FULL, 56000baseLR4_Full ),
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PHY_SETTING( 56000, FULL, 56000baseSR4_Full ),
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/* 50G */
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PHY_SETTING( 50000, FULL, 50000baseCR2_Full ),
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PHY_SETTING( 50000, FULL, 50000baseKR2_Full ),
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PHY_SETTING( 50000, FULL, 50000baseSR2_Full ),
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PHY_SETTING( 50000, FULL, 50000baseCR_Full ),
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PHY_SETTING( 50000, FULL, 50000baseKR_Full ),
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PHY_SETTING( 50000, FULL, 50000baseLR_ER_FR_Full ),
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PHY_SETTING( 50000, FULL, 50000baseDR_Full ),
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PHY_SETTING( 50000, FULL, 50000baseSR_Full ),
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/* 40G */
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PHY_SETTING( 40000, FULL, 40000baseCR4_Full ),
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PHY_SETTING( 40000, FULL, 40000baseKR4_Full ),
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PHY_SETTING( 40000, FULL, 40000baseLR4_Full ),
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PHY_SETTING( 40000, FULL, 40000baseSR4_Full ),
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/* 25G */
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PHY_SETTING( 25000, FULL, 25000baseCR_Full ),
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PHY_SETTING( 25000, FULL, 25000baseKR_Full ),
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PHY_SETTING( 25000, FULL, 25000baseSR_Full ),
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/* 20G */
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PHY_SETTING( 20000, FULL, 20000baseKR2_Full ),
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PHY_SETTING( 20000, FULL, 20000baseMLD2_Full ),
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/* 10G */
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PHY_SETTING( 10000, FULL, 10000baseCR_Full ),
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PHY_SETTING( 10000, FULL, 10000baseER_Full ),
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PHY_SETTING( 10000, FULL, 10000baseKR_Full ),
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PHY_SETTING( 10000, FULL, 10000baseKX4_Full ),
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PHY_SETTING( 10000, FULL, 10000baseLR_Full ),
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PHY_SETTING( 10000, FULL, 10000baseLRM_Full ),
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PHY_SETTING( 10000, FULL, 10000baseR_FEC ),
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PHY_SETTING( 10000, FULL, 10000baseSR_Full ),
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PHY_SETTING( 10000, FULL, 10000baseT_Full ),
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/* 5G */
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PHY_SETTING( 5000, FULL, 5000baseT_Full ),
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/* 2.5G */
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PHY_SETTING( 2500, FULL, 2500baseT_Full ),
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PHY_SETTING( 2500, FULL, 2500baseX_Full ),
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/* 1G */
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PHY_SETTING( 1000, FULL, 1000baseKX_Full ),
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PHY_SETTING( 1000, FULL, 1000baseT_Full ),
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PHY_SETTING( 1000, HALF, 1000baseT_Half ),
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PHY_SETTING( 1000, FULL, 1000baseT1_Full ),
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PHY_SETTING( 1000, FULL, 1000baseX_Full ),
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/* 100M */
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PHY_SETTING( 100, FULL, 100baseT_Full ),
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PHY_SETTING( 100, FULL, 100baseT1_Full ),
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PHY_SETTING( 100, HALF, 100baseT_Half ),
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/* 10M */
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PHY_SETTING( 10, FULL, 10baseT_Full ),
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PHY_SETTING( 10, HALF, 10baseT_Half ),
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};
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#undef PHY_SETTING
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/**
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* phy_lookup_setting - lookup a PHY setting
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* @speed: speed to match
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* @duplex: duplex to match
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* @mask: allowed link modes
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* @exact: an exact match is required
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*
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* Search the settings array for a setting that matches the speed and
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* duplex, and which is supported.
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*
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* If @exact is unset, either an exact match or %NULL for no match will
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* be returned.
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*
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* If @exact is set, an exact match, the fastest supported setting at
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* or below the specified speed, the slowest supported setting, or if
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* they all fail, %NULL will be returned.
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*/
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const struct phy_setting *
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phy_lookup_setting(int speed, int duplex, const unsigned long *mask, bool exact)
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{
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const struct phy_setting *p, *match = NULL, *last = NULL;
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int i;
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for (i = 0, p = settings; i < ARRAY_SIZE(settings); i++, p++) {
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if (p->bit < __ETHTOOL_LINK_MODE_MASK_NBITS &&
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test_bit(p->bit, mask)) {
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last = p;
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if (p->speed == speed && p->duplex == duplex) {
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/* Exact match for speed and duplex */
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match = p;
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break;
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} else if (!exact) {
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if (!match && p->speed <= speed)
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/* Candidate */
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match = p;
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if (p->speed < speed)
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break;
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}
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}
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}
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if (!match && !exact)
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match = last;
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return match;
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}
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EXPORT_SYMBOL_GPL(phy_lookup_setting);
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size_t phy_speeds(unsigned int *speeds, size_t size,
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unsigned long *mask)
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{
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size_t count;
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int i;
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for (i = 0, count = 0; i < ARRAY_SIZE(settings) && count < size; i++)
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if (settings[i].bit < __ETHTOOL_LINK_MODE_MASK_NBITS &&
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test_bit(settings[i].bit, mask) &&
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(count == 0 || speeds[count - 1] != settings[i].speed))
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speeds[count++] = settings[i].speed;
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return count;
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}
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static int __set_linkmode_max_speed(u32 max_speed, unsigned long *addr)
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{
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const struct phy_setting *p;
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int i;
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for (i = 0, p = settings; i < ARRAY_SIZE(settings); i++, p++) {
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if (p->speed > max_speed)
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linkmode_clear_bit(p->bit, addr);
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else
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break;
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}
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return 0;
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}
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static int __set_phy_supported(struct phy_device *phydev, u32 max_speed)
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{
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return __set_linkmode_max_speed(max_speed, phydev->supported);
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}
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int phy_set_max_speed(struct phy_device *phydev, u32 max_speed)
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{
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int err;
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err = __set_phy_supported(phydev, max_speed);
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if (err)
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return err;
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phy_advertise_supported(phydev);
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return 0;
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}
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EXPORT_SYMBOL(phy_set_max_speed);
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void of_set_phy_supported(struct phy_device *phydev)
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{
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struct device_node *node = phydev->mdio.dev.of_node;
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u32 max_speed;
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if (!IS_ENABLED(CONFIG_OF_MDIO))
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return;
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if (!node)
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return;
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if (!of_property_read_u32(node, "max-speed", &max_speed))
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__set_phy_supported(phydev, max_speed);
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}
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void of_set_phy_eee_broken(struct phy_device *phydev)
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{
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struct device_node *node = phydev->mdio.dev.of_node;
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u32 broken = 0;
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if (!IS_ENABLED(CONFIG_OF_MDIO))
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return;
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if (!node)
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return;
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if (of_property_read_bool(node, "eee-broken-100tx"))
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broken |= MDIO_EEE_100TX;
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if (of_property_read_bool(node, "eee-broken-1000t"))
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broken |= MDIO_EEE_1000T;
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if (of_property_read_bool(node, "eee-broken-10gt"))
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broken |= MDIO_EEE_10GT;
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if (of_property_read_bool(node, "eee-broken-1000kx"))
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broken |= MDIO_EEE_1000KX;
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if (of_property_read_bool(node, "eee-broken-10gkx4"))
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broken |= MDIO_EEE_10GKX4;
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if (of_property_read_bool(node, "eee-broken-10gkr"))
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broken |= MDIO_EEE_10GKR;
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phydev->eee_broken_modes = broken;
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}
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void phy_resolve_aneg_pause(struct phy_device *phydev)
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{
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if (phydev->duplex == DUPLEX_FULL) {
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phydev->pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
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phydev->lp_advertising);
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phydev->asym_pause = linkmode_test_bit(
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ETHTOOL_LINK_MODE_Asym_Pause_BIT,
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phydev->lp_advertising);
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}
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}
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EXPORT_SYMBOL_GPL(phy_resolve_aneg_pause);
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/**
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* phy_resolve_aneg_linkmode - resolve the advertisements into phy settings
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* @phydev: The phy_device struct
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*
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* Resolve our and the link partner advertisements into their corresponding
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* speed and duplex. If full duplex was negotiated, extract the pause mode
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* from the link partner mask.
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*/
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void phy_resolve_aneg_linkmode(struct phy_device *phydev)
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{
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__ETHTOOL_DECLARE_LINK_MODE_MASK(common);
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int i;
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linkmode_and(common, phydev->lp_advertising, phydev->advertising);
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for (i = 0; i < ARRAY_SIZE(settings); i++)
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if (test_bit(settings[i].bit, common)) {
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phydev->speed = settings[i].speed;
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phydev->duplex = settings[i].duplex;
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break;
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}
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phy_resolve_aneg_pause(phydev);
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}
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EXPORT_SYMBOL_GPL(phy_resolve_aneg_linkmode);
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/**
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* phy_check_downshift - check whether downshift occurred
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* @phydev: The phy_device struct
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*
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* Check whether a downshift to a lower speed occurred. If this should be the
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* case warn the user.
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* Prerequisite for detecting downshift is that PHY driver implements the
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* read_status callback and sets phydev->speed to the actual link speed.
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*/
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void phy_check_downshift(struct phy_device *phydev)
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{
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__ETHTOOL_DECLARE_LINK_MODE_MASK(common);
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int i, speed = SPEED_UNKNOWN;
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phydev->downshifted_rate = 0;
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if (phydev->autoneg == AUTONEG_DISABLE ||
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phydev->speed == SPEED_UNKNOWN)
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return;
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linkmode_and(common, phydev->lp_advertising, phydev->advertising);
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for (i = 0; i < ARRAY_SIZE(settings); i++)
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if (test_bit(settings[i].bit, common)) {
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speed = settings[i].speed;
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break;
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}
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if (speed == SPEED_UNKNOWN || phydev->speed >= speed)
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return;
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phydev_warn(phydev, "Downshift occurred from negotiated speed %s to actual speed %s, check cabling!\n",
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phy_speed_to_str(speed), phy_speed_to_str(phydev->speed));
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phydev->downshifted_rate = 1;
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}
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EXPORT_SYMBOL_GPL(phy_check_downshift);
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static int phy_resolve_min_speed(struct phy_device *phydev, bool fdx_only)
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{
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__ETHTOOL_DECLARE_LINK_MODE_MASK(common);
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int i = ARRAY_SIZE(settings);
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linkmode_and(common, phydev->lp_advertising, phydev->advertising);
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while (--i >= 0) {
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if (test_bit(settings[i].bit, common)) {
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if (fdx_only && settings[i].duplex != DUPLEX_FULL)
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continue;
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return settings[i].speed;
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}
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}
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return SPEED_UNKNOWN;
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}
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int phy_speed_down_core(struct phy_device *phydev)
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{
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int min_common_speed = phy_resolve_min_speed(phydev, true);
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if (min_common_speed == SPEED_UNKNOWN)
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return -EINVAL;
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return __set_linkmode_max_speed(min_common_speed, phydev->advertising);
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}
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static void mmd_phy_indirect(struct mii_bus *bus, int phy_addr, int devad,
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u16 regnum)
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{
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/* Write the desired MMD Devad */
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__mdiobus_write(bus, phy_addr, MII_MMD_CTRL, devad);
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/* Write the desired MMD register address */
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__mdiobus_write(bus, phy_addr, MII_MMD_DATA, regnum);
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/* Select the Function : DATA with no post increment */
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__mdiobus_write(bus, phy_addr, MII_MMD_CTRL,
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devad | MII_MMD_CTRL_NOINCR);
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}
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/**
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* __phy_read_mmd - Convenience function for reading a register
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* from an MMD on a given PHY.
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* @phydev: The phy_device struct
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* @devad: The MMD to read from (0..31)
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* @regnum: The register on the MMD to read (0..65535)
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*
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* Same rules as for __phy_read();
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*/
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int __phy_read_mmd(struct phy_device *phydev, int devad, u32 regnum)
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{
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int val;
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if (regnum > (u16)~0 || devad > 32)
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return -EINVAL;
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if (phydev->drv && phydev->drv->read_mmd) {
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val = phydev->drv->read_mmd(phydev, devad, regnum);
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} else if (phydev->is_c45) {
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val = __mdiobus_c45_read(phydev->mdio.bus, phydev->mdio.addr,
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devad, regnum);
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} else {
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struct mii_bus *bus = phydev->mdio.bus;
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int phy_addr = phydev->mdio.addr;
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mmd_phy_indirect(bus, phy_addr, devad, regnum);
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/* Read the content of the MMD's selected register */
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val = __mdiobus_read(bus, phy_addr, MII_MMD_DATA);
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}
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return val;
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}
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EXPORT_SYMBOL(__phy_read_mmd);
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/**
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* phy_read_mmd - Convenience function for reading a register
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* from an MMD on a given PHY.
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* @phydev: The phy_device struct
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* @devad: The MMD to read from
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* @regnum: The register on the MMD to read
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*
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* Same rules as for phy_read();
|
|
*/
|
|
int phy_read_mmd(struct phy_device *phydev, int devad, u32 regnum)
|
|
{
|
|
int ret;
|
|
|
|
phy_lock_mdio_bus(phydev);
|
|
ret = __phy_read_mmd(phydev, devad, regnum);
|
|
phy_unlock_mdio_bus(phydev);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(phy_read_mmd);
|
|
|
|
/**
|
|
* __phy_write_mmd - Convenience function for writing a register
|
|
* on an MMD on a given PHY.
|
|
* @phydev: The phy_device struct
|
|
* @devad: The MMD to read from
|
|
* @regnum: The register on the MMD to read
|
|
* @val: value to write to @regnum
|
|
*
|
|
* Same rules as for __phy_write();
|
|
*/
|
|
int __phy_write_mmd(struct phy_device *phydev, int devad, u32 regnum, u16 val)
|
|
{
|
|
int ret;
|
|
|
|
if (regnum > (u16)~0 || devad > 32)
|
|
return -EINVAL;
|
|
|
|
if (phydev->drv && phydev->drv->write_mmd) {
|
|
ret = phydev->drv->write_mmd(phydev, devad, regnum, val);
|
|
} else if (phydev->is_c45) {
|
|
ret = __mdiobus_c45_write(phydev->mdio.bus, phydev->mdio.addr,
|
|
devad, regnum, val);
|
|
} else {
|
|
struct mii_bus *bus = phydev->mdio.bus;
|
|
int phy_addr = phydev->mdio.addr;
|
|
|
|
mmd_phy_indirect(bus, phy_addr, devad, regnum);
|
|
|
|
/* Write the data into MMD's selected register */
|
|
__mdiobus_write(bus, phy_addr, MII_MMD_DATA, val);
|
|
|
|
ret = 0;
|
|
}
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(__phy_write_mmd);
|
|
|
|
/**
|
|
* phy_write_mmd - Convenience function for writing a register
|
|
* on an MMD on a given PHY.
|
|
* @phydev: The phy_device struct
|
|
* @devad: The MMD to read from
|
|
* @regnum: The register on the MMD to read
|
|
* @val: value to write to @regnum
|
|
*
|
|
* Same rules as for phy_write();
|
|
*/
|
|
int phy_write_mmd(struct phy_device *phydev, int devad, u32 regnum, u16 val)
|
|
{
|
|
int ret;
|
|
|
|
phy_lock_mdio_bus(phydev);
|
|
ret = __phy_write_mmd(phydev, devad, regnum, val);
|
|
phy_unlock_mdio_bus(phydev);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(phy_write_mmd);
|
|
|
|
/**
|
|
* phy_modify_changed - Function for modifying a PHY register
|
|
* @phydev: the phy_device struct
|
|
* @regnum: register number to modify
|
|
* @mask: bit mask of bits to clear
|
|
* @set: new value of bits set in mask to write to @regnum
|
|
*
|
|
* NOTE: MUST NOT be called from interrupt context,
|
|
* because the bus read/write functions may wait for an interrupt
|
|
* to conclude the operation.
|
|
*
|
|
* Returns negative errno, 0 if there was no change, and 1 in case of change
|
|
*/
|
|
int phy_modify_changed(struct phy_device *phydev, u32 regnum, u16 mask, u16 set)
|
|
{
|
|
int ret;
|
|
|
|
phy_lock_mdio_bus(phydev);
|
|
ret = __phy_modify_changed(phydev, regnum, mask, set);
|
|
phy_unlock_mdio_bus(phydev);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(phy_modify_changed);
|
|
|
|
/**
|
|
* __phy_modify - Convenience function for modifying a PHY register
|
|
* @phydev: the phy_device struct
|
|
* @regnum: register number to modify
|
|
* @mask: bit mask of bits to clear
|
|
* @set: new value of bits set in mask to write to @regnum
|
|
*
|
|
* NOTE: MUST NOT be called from interrupt context,
|
|
* because the bus read/write functions may wait for an interrupt
|
|
* to conclude the operation.
|
|
*/
|
|
int __phy_modify(struct phy_device *phydev, u32 regnum, u16 mask, u16 set)
|
|
{
|
|
int ret;
|
|
|
|
ret = __phy_modify_changed(phydev, regnum, mask, set);
|
|
|
|
return ret < 0 ? ret : 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(__phy_modify);
|
|
|
|
/**
|
|
* phy_modify - Convenience function for modifying a given PHY register
|
|
* @phydev: the phy_device struct
|
|
* @regnum: register number to write
|
|
* @mask: bit mask of bits to clear
|
|
* @set: new value of bits set in mask to write to @regnum
|
|
*
|
|
* NOTE: MUST NOT be called from interrupt context,
|
|
* because the bus read/write functions may wait for an interrupt
|
|
* to conclude the operation.
|
|
*/
|
|
int phy_modify(struct phy_device *phydev, u32 regnum, u16 mask, u16 set)
|
|
{
|
|
int ret;
|
|
|
|
phy_lock_mdio_bus(phydev);
|
|
ret = __phy_modify(phydev, regnum, mask, set);
|
|
phy_unlock_mdio_bus(phydev);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(phy_modify);
|
|
|
|
/**
|
|
* __phy_modify_mmd_changed - Function for modifying a register on MMD
|
|
* @phydev: the phy_device struct
|
|
* @devad: the MMD containing register to modify
|
|
* @regnum: register number to modify
|
|
* @mask: bit mask of bits to clear
|
|
* @set: new value of bits set in mask to write to @regnum
|
|
*
|
|
* Unlocked helper function which allows a MMD register to be modified as
|
|
* new register value = (old register value & ~mask) | set
|
|
*
|
|
* Returns negative errno, 0 if there was no change, and 1 in case of change
|
|
*/
|
|
int __phy_modify_mmd_changed(struct phy_device *phydev, int devad, u32 regnum,
|
|
u16 mask, u16 set)
|
|
{
|
|
int new, ret;
|
|
|
|
ret = __phy_read_mmd(phydev, devad, regnum);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
new = (ret & ~mask) | set;
|
|
if (new == ret)
|
|
return 0;
|
|
|
|
ret = __phy_write_mmd(phydev, devad, regnum, new);
|
|
|
|
return ret < 0 ? ret : 1;
|
|
}
|
|
EXPORT_SYMBOL_GPL(__phy_modify_mmd_changed);
|
|
|
|
/**
|
|
* phy_modify_mmd_changed - Function for modifying a register on MMD
|
|
* @phydev: the phy_device struct
|
|
* @devad: the MMD containing register to modify
|
|
* @regnum: register number to modify
|
|
* @mask: bit mask of bits to clear
|
|
* @set: new value of bits set in mask to write to @regnum
|
|
*
|
|
* NOTE: MUST NOT be called from interrupt context,
|
|
* because the bus read/write functions may wait for an interrupt
|
|
* to conclude the operation.
|
|
*
|
|
* Returns negative errno, 0 if there was no change, and 1 in case of change
|
|
*/
|
|
int phy_modify_mmd_changed(struct phy_device *phydev, int devad, u32 regnum,
|
|
u16 mask, u16 set)
|
|
{
|
|
int ret;
|
|
|
|
phy_lock_mdio_bus(phydev);
|
|
ret = __phy_modify_mmd_changed(phydev, devad, regnum, mask, set);
|
|
phy_unlock_mdio_bus(phydev);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(phy_modify_mmd_changed);
|
|
|
|
/**
|
|
* __phy_modify_mmd - Convenience function for modifying a register on MMD
|
|
* @phydev: the phy_device struct
|
|
* @devad: the MMD containing register to modify
|
|
* @regnum: register number to modify
|
|
* @mask: bit mask of bits to clear
|
|
* @set: new value of bits set in mask to write to @regnum
|
|
*
|
|
* NOTE: MUST NOT be called from interrupt context,
|
|
* because the bus read/write functions may wait for an interrupt
|
|
* to conclude the operation.
|
|
*/
|
|
int __phy_modify_mmd(struct phy_device *phydev, int devad, u32 regnum,
|
|
u16 mask, u16 set)
|
|
{
|
|
int ret;
|
|
|
|
ret = __phy_modify_mmd_changed(phydev, devad, regnum, mask, set);
|
|
|
|
return ret < 0 ? ret : 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(__phy_modify_mmd);
|
|
|
|
/**
|
|
* phy_modify_mmd - Convenience function for modifying a register on MMD
|
|
* @phydev: the phy_device struct
|
|
* @devad: the MMD containing register to modify
|
|
* @regnum: register number to modify
|
|
* @mask: bit mask of bits to clear
|
|
* @set: new value of bits set in mask to write to @regnum
|
|
*
|
|
* NOTE: MUST NOT be called from interrupt context,
|
|
* because the bus read/write functions may wait for an interrupt
|
|
* to conclude the operation.
|
|
*/
|
|
int phy_modify_mmd(struct phy_device *phydev, int devad, u32 regnum,
|
|
u16 mask, u16 set)
|
|
{
|
|
int ret;
|
|
|
|
phy_lock_mdio_bus(phydev);
|
|
ret = __phy_modify_mmd(phydev, devad, regnum, mask, set);
|
|
phy_unlock_mdio_bus(phydev);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(phy_modify_mmd);
|
|
|
|
static int __phy_read_page(struct phy_device *phydev)
|
|
{
|
|
if (WARN_ONCE(!phydev->drv->read_page, "read_page callback not available, PHY driver not loaded?\n"))
|
|
return -EOPNOTSUPP;
|
|
|
|
return phydev->drv->read_page(phydev);
|
|
}
|
|
|
|
static int __phy_write_page(struct phy_device *phydev, int page)
|
|
{
|
|
if (WARN_ONCE(!phydev->drv->write_page, "write_page callback not available, PHY driver not loaded?\n"))
|
|
return -EOPNOTSUPP;
|
|
|
|
return phydev->drv->write_page(phydev, page);
|
|
}
|
|
|
|
/**
|
|
* phy_save_page() - take the bus lock and save the current page
|
|
* @phydev: a pointer to a &struct phy_device
|
|
*
|
|
* Take the MDIO bus lock, and return the current page number. On error,
|
|
* returns a negative errno. phy_restore_page() must always be called
|
|
* after this, irrespective of success or failure of this call.
|
|
*/
|
|
int phy_save_page(struct phy_device *phydev)
|
|
{
|
|
phy_lock_mdio_bus(phydev);
|
|
return __phy_read_page(phydev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(phy_save_page);
|
|
|
|
/**
|
|
* phy_select_page() - take the bus lock, save the current page, and set a page
|
|
* @phydev: a pointer to a &struct phy_device
|
|
* @page: desired page
|
|
*
|
|
* Take the MDIO bus lock to protect against concurrent access, save the
|
|
* current PHY page, and set the current page. On error, returns a
|
|
* negative errno, otherwise returns the previous page number.
|
|
* phy_restore_page() must always be called after this, irrespective
|
|
* of success or failure of this call.
|
|
*/
|
|
int phy_select_page(struct phy_device *phydev, int page)
|
|
{
|
|
int ret, oldpage;
|
|
|
|
oldpage = ret = phy_save_page(phydev);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (oldpage != page) {
|
|
ret = __phy_write_page(phydev, page);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return oldpage;
|
|
}
|
|
EXPORT_SYMBOL_GPL(phy_select_page);
|
|
|
|
/**
|
|
* phy_restore_page() - restore the page register and release the bus lock
|
|
* @phydev: a pointer to a &struct phy_device
|
|
* @oldpage: the old page, return value from phy_save_page() or phy_select_page()
|
|
* @ret: operation's return code
|
|
*
|
|
* Release the MDIO bus lock, restoring @oldpage if it is a valid page.
|
|
* This function propagates the earliest error code from the group of
|
|
* operations.
|
|
*
|
|
* Returns:
|
|
* @oldpage if it was a negative value, otherwise
|
|
* @ret if it was a negative errno value, otherwise
|
|
* phy_write_page()'s negative value if it were in error, otherwise
|
|
* @ret.
|
|
*/
|
|
int phy_restore_page(struct phy_device *phydev, int oldpage, int ret)
|
|
{
|
|
int r;
|
|
|
|
if (oldpage >= 0) {
|
|
r = __phy_write_page(phydev, oldpage);
|
|
|
|
/* Propagate the operation return code if the page write
|
|
* was successful.
|
|
*/
|
|
if (ret >= 0 && r < 0)
|
|
ret = r;
|
|
} else {
|
|
/* Propagate the phy page selection error code */
|
|
ret = oldpage;
|
|
}
|
|
|
|
phy_unlock_mdio_bus(phydev);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(phy_restore_page);
|
|
|
|
/**
|
|
* phy_read_paged() - Convenience function for reading a paged register
|
|
* @phydev: a pointer to a &struct phy_device
|
|
* @page: the page for the phy
|
|
* @regnum: register number
|
|
*
|
|
* Same rules as for phy_read().
|
|
*/
|
|
int phy_read_paged(struct phy_device *phydev, int page, u32 regnum)
|
|
{
|
|
int ret = 0, oldpage;
|
|
|
|
oldpage = phy_select_page(phydev, page);
|
|
if (oldpage >= 0)
|
|
ret = __phy_read(phydev, regnum);
|
|
|
|
return phy_restore_page(phydev, oldpage, ret);
|
|
}
|
|
EXPORT_SYMBOL(phy_read_paged);
|
|
|
|
/**
|
|
* phy_write_paged() - Convenience function for writing a paged register
|
|
* @phydev: a pointer to a &struct phy_device
|
|
* @page: the page for the phy
|
|
* @regnum: register number
|
|
* @val: value to write
|
|
*
|
|
* Same rules as for phy_write().
|
|
*/
|
|
int phy_write_paged(struct phy_device *phydev, int page, u32 regnum, u16 val)
|
|
{
|
|
int ret = 0, oldpage;
|
|
|
|
oldpage = phy_select_page(phydev, page);
|
|
if (oldpage >= 0)
|
|
ret = __phy_write(phydev, regnum, val);
|
|
|
|
return phy_restore_page(phydev, oldpage, ret);
|
|
}
|
|
EXPORT_SYMBOL(phy_write_paged);
|
|
|
|
/**
|
|
* phy_modify_paged_changed() - Function for modifying a paged register
|
|
* @phydev: a pointer to a &struct phy_device
|
|
* @page: the page for the phy
|
|
* @regnum: register number
|
|
* @mask: bit mask of bits to clear
|
|
* @set: bit mask of bits to set
|
|
*
|
|
* Returns negative errno, 0 if there was no change, and 1 in case of change
|
|
*/
|
|
int phy_modify_paged_changed(struct phy_device *phydev, int page, u32 regnum,
|
|
u16 mask, u16 set)
|
|
{
|
|
int ret = 0, oldpage;
|
|
|
|
oldpage = phy_select_page(phydev, page);
|
|
if (oldpage >= 0)
|
|
ret = __phy_modify_changed(phydev, regnum, mask, set);
|
|
|
|
return phy_restore_page(phydev, oldpage, ret);
|
|
}
|
|
EXPORT_SYMBOL(phy_modify_paged_changed);
|
|
|
|
/**
|
|
* phy_modify_paged() - Convenience function for modifying a paged register
|
|
* @phydev: a pointer to a &struct phy_device
|
|
* @page: the page for the phy
|
|
* @regnum: register number
|
|
* @mask: bit mask of bits to clear
|
|
* @set: bit mask of bits to set
|
|
*
|
|
* Same rules as for phy_read() and phy_write().
|
|
*/
|
|
int phy_modify_paged(struct phy_device *phydev, int page, u32 regnum,
|
|
u16 mask, u16 set)
|
|
{
|
|
int ret = phy_modify_paged_changed(phydev, page, regnum, mask, set);
|
|
|
|
return ret < 0 ? ret : 0;
|
|
}
|
|
EXPORT_SYMBOL(phy_modify_paged);
|