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net: phy: Add Broadcom phy library for common interfaces
This patch adds the Broadcom phy library to consolidate common interfaces shared by Broadcom phy's. Moved the common interfaces to the 'bcm-phy-lib.c' and updated the Broadcom PHY drivers to use the new APIs. Signed-off-by: Arun Parameswaran <arunp@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,208 @@ | ||
| /* | ||
| * Copyright (C) 2015 Broadcom Corporation | ||
| * | ||
| * This program is free software; you can redistribute it and/or | ||
| * modify it under the terms of the GNU General Public License as | ||
| * published by the Free Software Foundation version 2. | ||
| * | ||
| * This program is distributed "as is" WITHOUT ANY WARRANTY of any | ||
| * kind, whether express or implied; without even the implied warranty | ||
| * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| */ | ||
|
|
||
| #include "bcm-phy-lib.h" | ||
| #include <linux/brcmphy.h> | ||
| #include <linux/export.h> | ||
| #include <linux/mdio.h> | ||
| #include <linux/phy.h> | ||
|
|
||
| #define MII_BCM_CHANNEL_WIDTH 0x2000 | ||
| #define BCM_CL45VEN_EEE_ADV 0x3c | ||
|
|
||
| int bcm_phy_write_exp(struct phy_device *phydev, u16 reg, u16 val) | ||
| { | ||
| int rc; | ||
|
|
||
| rc = phy_write(phydev, MII_BCM54XX_EXP_SEL, reg); | ||
| if (rc < 0) | ||
| return rc; | ||
|
|
||
| return phy_write(phydev, MII_BCM54XX_EXP_DATA, val); | ||
| } | ||
| EXPORT_SYMBOL_GPL(bcm_phy_write_exp); | ||
|
|
||
| int bcm_phy_read_exp(struct phy_device *phydev, u16 reg) | ||
| { | ||
| int val; | ||
|
|
||
| val = phy_write(phydev, MII_BCM54XX_EXP_SEL, reg); | ||
| if (val < 0) | ||
| return val; | ||
|
|
||
| val = phy_read(phydev, MII_BCM54XX_EXP_DATA); | ||
|
|
||
| /* Restore default value. It's O.K. if this write fails. */ | ||
| phy_write(phydev, MII_BCM54XX_EXP_SEL, 0); | ||
|
|
||
| return val; | ||
| } | ||
| EXPORT_SYMBOL_GPL(bcm_phy_read_exp); | ||
|
|
||
| int bcm_phy_write_misc(struct phy_device *phydev, | ||
| u16 reg, u16 chl, u16 val) | ||
| { | ||
| int rc; | ||
| int tmp; | ||
|
|
||
| rc = phy_write(phydev, MII_BCM54XX_AUX_CTL, | ||
| MII_BCM54XX_AUXCTL_SHDWSEL_MISC); | ||
| if (rc < 0) | ||
| return rc; | ||
|
|
||
| tmp = phy_read(phydev, MII_BCM54XX_AUX_CTL); | ||
| tmp |= MII_BCM54XX_AUXCTL_ACTL_SMDSP_ENA; | ||
| rc = phy_write(phydev, MII_BCM54XX_AUX_CTL, tmp); | ||
| if (rc < 0) | ||
| return rc; | ||
|
|
||
| tmp = (chl * MII_BCM_CHANNEL_WIDTH) | reg; | ||
| rc = bcm_phy_write_exp(phydev, tmp, val); | ||
|
|
||
| return rc; | ||
| } | ||
| EXPORT_SYMBOL_GPL(bcm_phy_write_misc); | ||
|
|
||
| int bcm_phy_read_misc(struct phy_device *phydev, | ||
| u16 reg, u16 chl) | ||
| { | ||
| int rc; | ||
| int tmp; | ||
|
|
||
| rc = phy_write(phydev, MII_BCM54XX_AUX_CTL, | ||
| MII_BCM54XX_AUXCTL_SHDWSEL_MISC); | ||
| if (rc < 0) | ||
| return rc; | ||
|
|
||
| tmp = phy_read(phydev, MII_BCM54XX_AUX_CTL); | ||
| tmp |= MII_BCM54XX_AUXCTL_ACTL_SMDSP_ENA; | ||
| rc = phy_write(phydev, MII_BCM54XX_AUX_CTL, tmp); | ||
| if (rc < 0) | ||
| return rc; | ||
|
|
||
| tmp = (chl * MII_BCM_CHANNEL_WIDTH) | reg; | ||
| rc = bcm_phy_read_exp(phydev, tmp); | ||
|
|
||
| return rc; | ||
| } | ||
| EXPORT_SYMBOL_GPL(bcm_phy_read_misc); | ||
|
|
||
| int bcm_phy_ack_intr(struct phy_device *phydev) | ||
| { | ||
| int reg; | ||
|
|
||
| /* Clear pending interrupts. */ | ||
| reg = phy_read(phydev, MII_BCM54XX_ISR); | ||
| if (reg < 0) | ||
| return reg; | ||
|
|
||
| return 0; | ||
| } | ||
| EXPORT_SYMBOL_GPL(bcm_phy_ack_intr); | ||
|
|
||
| int bcm_phy_config_intr(struct phy_device *phydev) | ||
| { | ||
| int reg; | ||
|
|
||
| reg = phy_read(phydev, MII_BCM54XX_ECR); | ||
| if (reg < 0) | ||
| return reg; | ||
|
|
||
| if (phydev->interrupts == PHY_INTERRUPT_ENABLED) | ||
| reg &= ~MII_BCM54XX_ECR_IM; | ||
| else | ||
| reg |= MII_BCM54XX_ECR_IM; | ||
|
|
||
| return phy_write(phydev, MII_BCM54XX_ECR, reg); | ||
| } | ||
| EXPORT_SYMBOL_GPL(bcm_phy_config_intr); | ||
|
|
||
| int bcm_phy_read_shadow(struct phy_device *phydev, u16 shadow) | ||
| { | ||
| phy_write(phydev, MII_BCM54XX_SHD, MII_BCM54XX_SHD_VAL(shadow)); | ||
| return MII_BCM54XX_SHD_DATA(phy_read(phydev, MII_BCM54XX_SHD)); | ||
| } | ||
| EXPORT_SYMBOL_GPL(bcm_phy_read_shadow); | ||
|
|
||
| int bcm_phy_write_shadow(struct phy_device *phydev, u16 shadow, | ||
| u16 val) | ||
| { | ||
| return phy_write(phydev, MII_BCM54XX_SHD, | ||
| MII_BCM54XX_SHD_WRITE | | ||
| MII_BCM54XX_SHD_VAL(shadow) | | ||
| MII_BCM54XX_SHD_DATA(val)); | ||
| } | ||
| EXPORT_SYMBOL_GPL(bcm_phy_write_shadow); | ||
|
|
||
| int bcm_phy_enable_apd(struct phy_device *phydev, bool dll_pwr_down) | ||
| { | ||
| int val; | ||
|
|
||
| if (dll_pwr_down) { | ||
| val = bcm_phy_read_shadow(phydev, BCM54XX_SHD_SCR3); | ||
| if (val < 0) | ||
| return val; | ||
|
|
||
| val |= BCM54XX_SHD_SCR3_DLLAPD_DIS; | ||
| bcm_phy_write_shadow(phydev, BCM54XX_SHD_SCR3, val); | ||
| } | ||
|
|
||
| val = bcm_phy_read_shadow(phydev, BCM54XX_SHD_APD); | ||
| if (val < 0) | ||
| return val; | ||
|
|
||
| /* Clear APD bits */ | ||
| val &= BCM_APD_CLR_MASK; | ||
|
|
||
| if (phydev->autoneg == AUTONEG_ENABLE) | ||
| val |= BCM54XX_SHD_APD_EN; | ||
| else | ||
| val |= BCM_NO_ANEG_APD_EN; | ||
|
|
||
| /* Enable energy detect single link pulse for easy wakeup */ | ||
| val |= BCM_APD_SINGLELP_EN; | ||
|
|
||
| /* Enable Auto Power-Down (APD) for the PHY */ | ||
| return bcm_phy_write_shadow(phydev, BCM54XX_SHD_APD, val); | ||
| } | ||
| EXPORT_SYMBOL_GPL(bcm_phy_enable_apd); | ||
|
|
||
| int bcm_phy_enable_eee(struct phy_device *phydev) | ||
| { | ||
| int val; | ||
|
|
||
| /* Enable EEE at PHY level */ | ||
| val = phy_read_mmd_indirect(phydev, BRCM_CL45VEN_EEE_CONTROL, | ||
| MDIO_MMD_AN, phydev->addr); | ||
| if (val < 0) | ||
| return val; | ||
|
|
||
| val |= LPI_FEATURE_EN | LPI_FEATURE_EN_DIG1000X; | ||
|
|
||
| phy_write_mmd_indirect(phydev, BRCM_CL45VEN_EEE_CONTROL, | ||
| MDIO_MMD_AN, phydev->addr, (u32)val); | ||
|
|
||
| /* Advertise EEE */ | ||
| val = phy_read_mmd_indirect(phydev, BCM_CL45VEN_EEE_ADV, | ||
| MDIO_MMD_AN, phydev->addr); | ||
| if (val < 0) | ||
| return val; | ||
|
|
||
| val |= (MDIO_AN_EEE_ADV_100TX | MDIO_AN_EEE_ADV_1000T); | ||
|
|
||
| phy_write_mmd_indirect(phydev, BCM_CL45VEN_EEE_ADV, | ||
| MDIO_MMD_AN, phydev->addr, (u32)val); | ||
|
|
||
| return 0; | ||
| } | ||
| EXPORT_SYMBOL_GPL(bcm_phy_enable_eee); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| /* | ||
| * Copyright (C) 2015 Broadcom Corporation | ||
| * | ||
| * This program is free software; you can redistribute it and/or | ||
| * modify it under the terms of the GNU General Public License as | ||
| * published by the Free Software Foundation version 2. | ||
| * | ||
| * This program is distributed "as is" WITHOUT ANY WARRANTY of any | ||
| * kind, whether express or implied; without even the implied warranty | ||
| * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| */ | ||
|
|
||
| #ifndef _LINUX_BCM_PHY_LIB_H | ||
| #define _LINUX_BCM_PHY_LIB_H | ||
|
|
||
| #include <linux/phy.h> | ||
|
|
||
| int bcm_phy_write_exp(struct phy_device *phydev, u16 reg, u16 val); | ||
| int bcm_phy_read_exp(struct phy_device *phydev, u16 reg); | ||
|
|
||
| int bcm_phy_write_misc(struct phy_device *phydev, | ||
| u16 reg, u16 chl, u16 value); | ||
| int bcm_phy_read_misc(struct phy_device *phydev, | ||
| u16 reg, u16 chl); | ||
|
|
||
| int bcm_phy_write_shadow(struct phy_device *phydev, u16 shadow, | ||
| u16 val); | ||
| int bcm_phy_read_shadow(struct phy_device *phydev, u16 shadow); | ||
|
|
||
| int bcm_phy_ack_intr(struct phy_device *phydev); | ||
| int bcm_phy_config_intr(struct phy_device *phydev); | ||
|
|
||
| int bcm_phy_enable_apd(struct phy_device *phydev, bool dll_pwr_down); | ||
|
|
||
| int bcm_phy_enable_eee(struct phy_device *phydev); | ||
| #endif /* _LINUX_BCM_PHY_LIB_H */ |
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