forked from Minki/linux
60efff0c3d
GPHY revision G0 has its version rolled over to 0x10, introduce an explicit check for that revision and invoke the proper workaround function for it. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
474 lines
13 KiB
C
474 lines
13 KiB
C
/*
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* Broadcom BCM7xxx internal transceivers support.
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*
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* Copyright (C) 2014, Broadcom Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/phy.h>
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#include <linux/delay.h>
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#include <linux/bitops.h>
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#include <linux/brcmphy.h>
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#include <linux/mdio.h>
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/* Broadcom BCM7xxx internal PHY registers */
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#define MII_BCM7XXX_CHANNEL_WIDTH 0x2000
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/* 40nm only register definitions */
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#define MII_BCM7XXX_100TX_AUX_CTL 0x10
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#define MII_BCM7XXX_100TX_FALSE_CAR 0x13
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#define MII_BCM7XXX_100TX_DISC 0x14
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#define MII_BCM7XXX_AUX_MODE 0x1d
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#define MII_BCM7XX_64CLK_MDIO BIT(12)
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#define MII_BCM7XXX_CORE_BASE1E 0x1e
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#define MII_BCM7XXX_TEST 0x1f
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#define MII_BCM7XXX_SHD_MODE_2 BIT(2)
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/* 28nm only register definitions */
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#define MISC_ADDR(base, channel) base, channel
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#define DSP_TAP10 MISC_ADDR(0x0a, 0)
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#define PLL_PLLCTRL_1 MISC_ADDR(0x32, 1)
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#define PLL_PLLCTRL_2 MISC_ADDR(0x32, 2)
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#define PLL_PLLCTRL_4 MISC_ADDR(0x33, 0)
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#define AFE_RXCONFIG_0 MISC_ADDR(0x38, 0)
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#define AFE_RXCONFIG_1 MISC_ADDR(0x38, 1)
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#define AFE_RXCONFIG_2 MISC_ADDR(0x38, 2)
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#define AFE_RX_LP_COUNTER MISC_ADDR(0x38, 3)
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#define AFE_TX_CONFIG MISC_ADDR(0x39, 0)
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#define AFE_VDCA_ICTRL_0 MISC_ADDR(0x39, 1)
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#define AFE_VDAC_OTHERS_0 MISC_ADDR(0x39, 3)
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#define AFE_HPF_TRIM_OTHERS MISC_ADDR(0x3a, 0)
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#define CORE_EXPB0 0xb0
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static void phy_write_exp(struct phy_device *phydev,
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u16 reg, u16 value)
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{
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phy_write(phydev, MII_BCM54XX_EXP_SEL, MII_BCM54XX_EXP_SEL_ER | reg);
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phy_write(phydev, MII_BCM54XX_EXP_DATA, value);
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}
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static void phy_write_misc(struct phy_device *phydev,
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u16 reg, u16 chl, u16 value)
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{
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int tmp;
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phy_write(phydev, MII_BCM54XX_AUX_CTL, MII_BCM54XX_AUXCTL_SHDWSEL_MISC);
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tmp = phy_read(phydev, MII_BCM54XX_AUX_CTL);
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tmp |= MII_BCM54XX_AUXCTL_ACTL_SMDSP_ENA;
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phy_write(phydev, MII_BCM54XX_AUX_CTL, tmp);
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tmp = (chl * MII_BCM7XXX_CHANNEL_WIDTH) | reg;
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phy_write(phydev, MII_BCM54XX_EXP_SEL, tmp);
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phy_write(phydev, MII_BCM54XX_EXP_DATA, value);
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}
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static void r_rc_cal_reset(struct phy_device *phydev)
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{
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/* Reset R_CAL/RC_CAL Engine */
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phy_write_exp(phydev, 0x00b0, 0x0010);
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/* Disable Reset R_AL/RC_CAL Engine */
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phy_write_exp(phydev, 0x00b0, 0x0000);
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}
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static int bcm7xxx_28nm_b0_afe_config_init(struct phy_device *phydev)
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{
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/* Increase VCO range to prevent unlocking problem of PLL at low
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* temp
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*/
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phy_write_misc(phydev, PLL_PLLCTRL_1, 0x0048);
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/* Change Ki to 011 */
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phy_write_misc(phydev, PLL_PLLCTRL_2, 0x021b);
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/* Disable loading of TVCO buffer to bandgap, set bandgap trim
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* to 111
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*/
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phy_write_misc(phydev, PLL_PLLCTRL_4, 0x0e20);
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/* Adjust bias current trim by -3 */
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phy_write_misc(phydev, DSP_TAP10, 0x690b);
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/* Switch to CORE_BASE1E */
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phy_write(phydev, MII_BCM7XXX_CORE_BASE1E, 0xd);
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r_rc_cal_reset(phydev);
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/* write AFE_RXCONFIG_0 */
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phy_write_misc(phydev, AFE_RXCONFIG_0, 0xeb19);
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/* write AFE_RXCONFIG_1 */
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phy_write_misc(phydev, AFE_RXCONFIG_1, 0x9a3f);
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/* write AFE_RX_LP_COUNTER */
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phy_write_misc(phydev, AFE_RX_LP_COUNTER, 0x7fc0);
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/* write AFE_HPF_TRIM_OTHERS */
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phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x000b);
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/* write AFTE_TX_CONFIG */
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phy_write_misc(phydev, AFE_TX_CONFIG, 0x0800);
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return 0;
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}
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static int bcm7xxx_28nm_d0_afe_config_init(struct phy_device *phydev)
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{
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/* AFE_RXCONFIG_0 */
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phy_write_misc(phydev, AFE_RXCONFIG_0, 0xeb15);
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/* AFE_RXCONFIG_1 */
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phy_write_misc(phydev, AFE_RXCONFIG_1, 0x9b2f);
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/* AFE_RXCONFIG_2, set rCal offset for HT=0 code and LT=-2 code */
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phy_write_misc(phydev, AFE_RXCONFIG_2, 0x2003);
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/* AFE_RX_LP_COUNTER, set RX bandwidth to maximum */
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phy_write_misc(phydev, AFE_RX_LP_COUNTER, 0x7fc0);
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/* AFE_TX_CONFIG, set 1000BT Cfeed=110 for all ports */
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phy_write_misc(phydev, AFE_TX_CONFIG, 0x0061);
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/* AFE_VDCA_ICTRL_0, set Iq=1101 instead of 0111 for AB symmetry */
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phy_write_misc(phydev, AFE_VDCA_ICTRL_0, 0xa7da);
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/* AFE_VDAC_OTHERS_0, set 1000BT Cidac=010 for all ports */
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phy_write_misc(phydev, AFE_VDAC_OTHERS_0, 0xa020);
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/* AFE_HPF_TRIM_OTHERS, set 100Tx/10BT to -4.5% swing and set rCal
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* offset for HT=0 code
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*/
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phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x00e3);
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/* CORE_BASE1E, force trim to overwrite and set I_ext trim to 0000 */
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phy_write(phydev, MII_BCM7XXX_CORE_BASE1E, 0x0010);
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/* DSP_TAP10, adjust bias current trim (+0% swing, +0 tick) */
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phy_write_misc(phydev, DSP_TAP10, 0x011b);
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/* Reset R_CAL/RC_CAL engine */
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r_rc_cal_reset(phydev);
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return 0;
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}
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static int bcm7xxx_28nm_e0_plus_afe_config_init(struct phy_device *phydev)
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{
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/* AFE_RXCONFIG_1, provide more margin for INL/DNL measurement */
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phy_write_misc(phydev, AFE_RXCONFIG_1, 0x9b2f);
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/* AFE_VDCA_ICTRL_0, set Iq=1101 instead of 0111 for AB symmetry */
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phy_write_misc(phydev, AFE_VDCA_ICTRL_0, 0xa7da);
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/* AFE_HPF_TRIM_OTHERS, set 100Tx/10BT to -4.5% swing and set rCal
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* offset for HT=0 code
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*/
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phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x00e3);
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/* CORE_BASE1E, force trim to overwrite and set I_ext trim to 0000 */
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phy_write(phydev, MII_BCM7XXX_CORE_BASE1E, 0x0010);
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/* DSP_TAP10, adjust bias current trim (+0% swing, +0 tick) */
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phy_write_misc(phydev, DSP_TAP10, 0x011b);
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/* Reset R_CAL/RC_CAL engine */
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r_rc_cal_reset(phydev);
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return 0;
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}
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static int bcm7xxx_apd_enable(struct phy_device *phydev)
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{
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int val;
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/* Enable powering down of the DLL during auto-power down */
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val = bcm54xx_shadow_read(phydev, BCM54XX_SHD_SCR3);
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if (val < 0)
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return val;
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val |= BCM54XX_SHD_SCR3_DLLAPD_DIS;
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bcm54xx_shadow_write(phydev, BCM54XX_SHD_SCR3, val);
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/* Enable auto-power down */
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val = bcm54xx_shadow_read(phydev, BCM54XX_SHD_APD);
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if (val < 0)
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return val;
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val |= BCM54XX_SHD_APD_EN;
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return bcm54xx_shadow_write(phydev, BCM54XX_SHD_APD, val);
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}
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static int bcm7xxx_eee_enable(struct phy_device *phydev)
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{
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int val;
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val = phy_read_mmd_indirect(phydev, BRCM_CL45VEN_EEE_CONTROL,
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MDIO_MMD_AN, phydev->addr);
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if (val < 0)
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return val;
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/* Enable general EEE feature at the PHY level */
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val |= LPI_FEATURE_EN | LPI_FEATURE_EN_DIG1000X;
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phy_write_mmd_indirect(phydev, BRCM_CL45VEN_EEE_CONTROL,
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MDIO_MMD_AN, phydev->addr, val);
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/* Advertise supported modes */
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val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV,
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MDIO_MMD_AN, phydev->addr);
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val |= (MDIO_AN_EEE_ADV_100TX | MDIO_AN_EEE_ADV_1000T);
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phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV,
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MDIO_MMD_AN, phydev->addr, val);
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return 0;
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}
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static int bcm7xxx_28nm_config_init(struct phy_device *phydev)
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{
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u8 rev = PHY_BRCM_7XXX_REV(phydev->dev_flags);
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u8 patch = PHY_BRCM_7XXX_PATCH(phydev->dev_flags);
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int ret = 0;
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pr_info_once("%s: %s PHY revision: 0x%02x, patch: %d\n",
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dev_name(&phydev->dev), phydev->drv->name, rev, patch);
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switch (rev) {
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case 0xb0:
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ret = bcm7xxx_28nm_b0_afe_config_init(phydev);
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break;
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case 0xd0:
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ret = bcm7xxx_28nm_d0_afe_config_init(phydev);
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break;
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case 0xe0:
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case 0xf0:
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/* Rev G0 introduces a roll over */
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case 0x10:
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ret = bcm7xxx_28nm_e0_plus_afe_config_init(phydev);
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break;
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default:
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break;
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}
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if (ret)
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return ret;
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ret = bcm7xxx_eee_enable(phydev);
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if (ret)
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return ret;
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return bcm7xxx_apd_enable(phydev);
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}
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static int bcm7xxx_28nm_resume(struct phy_device *phydev)
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{
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int ret;
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/* Re-apply workarounds coming out suspend/resume */
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ret = bcm7xxx_28nm_config_init(phydev);
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if (ret)
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return ret;
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/* 28nm Gigabit PHYs come out of reset without any half-duplex
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* or "hub" compliant advertised mode, fix that. This does not
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* cause any problems with the PHY library since genphy_config_aneg()
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* gracefully handles auto-negotiated and forced modes.
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*/
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return genphy_config_aneg(phydev);
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}
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static int phy_set_clr_bits(struct phy_device *dev, int location,
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int set_mask, int clr_mask)
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{
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int v, ret;
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v = phy_read(dev, location);
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if (v < 0)
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return v;
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v &= ~clr_mask;
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v |= set_mask;
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ret = phy_write(dev, location, v);
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if (ret < 0)
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return ret;
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return v;
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}
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static int bcm7xxx_config_init(struct phy_device *phydev)
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{
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int ret;
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/* Enable 64 clock MDIO */
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phy_write(phydev, MII_BCM7XXX_AUX_MODE, MII_BCM7XX_64CLK_MDIO);
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phy_read(phydev, MII_BCM7XXX_AUX_MODE);
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/* Workaround only required for 100Mbits/sec capable PHYs */
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if (phydev->supported & PHY_GBIT_FEATURES)
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return 0;
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/* set shadow mode 2 */
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ret = phy_set_clr_bits(phydev, MII_BCM7XXX_TEST,
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MII_BCM7XXX_SHD_MODE_2, MII_BCM7XXX_SHD_MODE_2);
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if (ret < 0)
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return ret;
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/* set iddq_clkbias */
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phy_write(phydev, MII_BCM7XXX_100TX_DISC, 0x0F00);
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udelay(10);
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/* reset iddq_clkbias */
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phy_write(phydev, MII_BCM7XXX_100TX_DISC, 0x0C00);
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phy_write(phydev, MII_BCM7XXX_100TX_FALSE_CAR, 0x7555);
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/* reset shadow mode 2 */
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ret = phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, MII_BCM7XXX_SHD_MODE_2, 0);
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if (ret < 0)
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return ret;
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return 0;
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}
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/* Workaround for putting the PHY in IDDQ mode, required
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* for all BCM7XXX 40nm and 65nm PHYs
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*/
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static int bcm7xxx_suspend(struct phy_device *phydev)
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{
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int ret;
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const struct bcm7xxx_regs {
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int reg;
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u16 value;
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} bcm7xxx_suspend_cfg[] = {
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{ MII_BCM7XXX_TEST, 0x008b },
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{ MII_BCM7XXX_100TX_AUX_CTL, 0x01c0 },
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{ MII_BCM7XXX_100TX_DISC, 0x7000 },
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{ MII_BCM7XXX_TEST, 0x000f },
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{ MII_BCM7XXX_100TX_AUX_CTL, 0x20d0 },
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{ MII_BCM7XXX_TEST, 0x000b },
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};
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(bcm7xxx_suspend_cfg); i++) {
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ret = phy_write(phydev,
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bcm7xxx_suspend_cfg[i].reg,
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bcm7xxx_suspend_cfg[i].value);
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if (ret)
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return ret;
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}
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return 0;
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}
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static int bcm7xxx_dummy_config_init(struct phy_device *phydev)
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{
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return 0;
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}
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#define BCM7XXX_28NM_GPHY(_oui, _name) \
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{ \
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.phy_id = (_oui), \
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.phy_id_mask = 0xfffffff0, \
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.name = _name, \
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.features = PHY_GBIT_FEATURES | \
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SUPPORTED_Pause | SUPPORTED_Asym_Pause, \
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.flags = PHY_IS_INTERNAL, \
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.config_init = bcm7xxx_28nm_config_init, \
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.config_aneg = genphy_config_aneg, \
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.read_status = genphy_read_status, \
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.resume = bcm7xxx_28nm_resume, \
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.driver = { .owner = THIS_MODULE }, \
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}
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static struct phy_driver bcm7xxx_driver[] = {
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BCM7XXX_28NM_GPHY(PHY_ID_BCM7250, "Broadcom BCM7250"),
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BCM7XXX_28NM_GPHY(PHY_ID_BCM7364, "Broadcom BCM7364"),
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BCM7XXX_28NM_GPHY(PHY_ID_BCM7366, "Broadcom BCM7366"),
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BCM7XXX_28NM_GPHY(PHY_ID_BCM7439, "Broadcom BCM7439"),
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BCM7XXX_28NM_GPHY(PHY_ID_BCM7445, "Broadcom BCM7445"),
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{
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.phy_id = PHY_ID_BCM7425,
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.phy_id_mask = 0xfffffff0,
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.name = "Broadcom BCM7425",
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.features = PHY_GBIT_FEATURES |
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SUPPORTED_Pause | SUPPORTED_Asym_Pause,
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.flags = 0,
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.config_init = bcm7xxx_config_init,
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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.suspend = bcm7xxx_suspend,
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.resume = bcm7xxx_config_init,
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.driver = { .owner = THIS_MODULE },
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}, {
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.phy_id = PHY_ID_BCM7429,
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.phy_id_mask = 0xfffffff0,
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.name = "Broadcom BCM7429",
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.features = PHY_GBIT_FEATURES |
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SUPPORTED_Pause | SUPPORTED_Asym_Pause,
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.flags = PHY_IS_INTERNAL,
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.config_init = bcm7xxx_config_init,
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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.suspend = bcm7xxx_suspend,
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.resume = bcm7xxx_config_init,
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.driver = { .owner = THIS_MODULE },
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}, {
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.phy_id = PHY_BCM_OUI_4,
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.phy_id_mask = 0xffff0000,
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.name = "Broadcom BCM7XXX 40nm",
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.features = PHY_GBIT_FEATURES |
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SUPPORTED_Pause | SUPPORTED_Asym_Pause,
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.flags = PHY_IS_INTERNAL,
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.config_init = bcm7xxx_config_init,
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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.suspend = bcm7xxx_suspend,
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.resume = bcm7xxx_config_init,
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.driver = { .owner = THIS_MODULE },
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}, {
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.phy_id = PHY_BCM_OUI_5,
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.phy_id_mask = 0xffffff00,
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.name = "Broadcom BCM7XXX 65nm",
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.features = PHY_BASIC_FEATURES |
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SUPPORTED_Pause | SUPPORTED_Asym_Pause,
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.flags = PHY_IS_INTERNAL,
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.config_init = bcm7xxx_dummy_config_init,
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.config_aneg = genphy_config_aneg,
|
|
.read_status = genphy_read_status,
|
|
.suspend = bcm7xxx_suspend,
|
|
.resume = bcm7xxx_config_init,
|
|
.driver = { .owner = THIS_MODULE },
|
|
} };
|
|
|
|
static struct mdio_device_id __maybe_unused bcm7xxx_tbl[] = {
|
|
{ PHY_ID_BCM7250, 0xfffffff0, },
|
|
{ PHY_ID_BCM7364, 0xfffffff0, },
|
|
{ PHY_ID_BCM7366, 0xfffffff0, },
|
|
{ PHY_ID_BCM7425, 0xfffffff0, },
|
|
{ PHY_ID_BCM7429, 0xfffffff0, },
|
|
{ PHY_ID_BCM7439, 0xfffffff0, },
|
|
{ PHY_ID_BCM7445, 0xfffffff0, },
|
|
{ PHY_BCM_OUI_4, 0xffff0000 },
|
|
{ PHY_BCM_OUI_5, 0xffffff00 },
|
|
{ }
|
|
};
|
|
|
|
module_phy_driver(bcm7xxx_driver);
|
|
|
|
MODULE_DEVICE_TABLE(mdio, bcm7xxx_tbl);
|
|
|
|
MODULE_DESCRIPTION("Broadcom BCM7xxx internal PHY driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Broadcom Corporation");
|