452 lines
12 KiB
C
452 lines
12 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 "bcm-phy-lib.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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/* 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_BCM7XXX_64CLK_MDIO BIT(12)
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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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struct bcm7xxx_phy_priv {
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u64 *stats;
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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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bcm_phy_write_exp(phydev, 0x00b0, 0x0010);
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/* Disable Reset R_AL/RC_CAL Engine */
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bcm_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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bcm_phy_write_misc(phydev, PLL_PLLCTRL_1, 0x0048);
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/* Change Ki to 011 */
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bcm_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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bcm_phy_write_misc(phydev, PLL_PLLCTRL_4, 0x0e20);
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/* Adjust bias current trim by -3 */
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bcm_phy_write_misc(phydev, DSP_TAP10, 0x690b);
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/* Switch to CORE_BASE1E */
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phy_write(phydev, MII_BRCM_CORE_BASE1E, 0xd);
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r_rc_cal_reset(phydev);
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/* write AFE_RXCONFIG_0 */
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bcm_phy_write_misc(phydev, AFE_RXCONFIG_0, 0xeb19);
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/* write AFE_RXCONFIG_1 */
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bcm_phy_write_misc(phydev, AFE_RXCONFIG_1, 0x9a3f);
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/* write AFE_RX_LP_COUNTER */
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bcm_phy_write_misc(phydev, AFE_RX_LP_COUNTER, 0x7fc0);
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/* write AFE_HPF_TRIM_OTHERS */
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bcm_phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x000b);
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/* write AFTE_TX_CONFIG */
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bcm_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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bcm_phy_write_misc(phydev, AFE_RXCONFIG_0, 0xeb15);
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/* AFE_RXCONFIG_1 */
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bcm_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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bcm_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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bcm_phy_write_misc(phydev, AFE_RX_LP_COUNTER, 0x7fc0);
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/* AFE_TX_CONFIG, set 100BT Cfeed=011 to improve rise/fall time */
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bcm_phy_write_misc(phydev, AFE_TX_CONFIG, 0x431);
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/* AFE_VDCA_ICTRL_0, set Iq=1101 instead of 0111 for AB symmetry */
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bcm_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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bcm_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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bcm_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_BRCM_CORE_BASE1E, 0x0010);
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/* DSP_TAP10, adjust bias current trim (+0% swing, +0 tick) */
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bcm_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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bcm_phy_write_misc(phydev, AFE_RXCONFIG_1, 0x9b2f);
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/* AFE_TX_CONFIG, set 100BT Cfeed=011 to improve rise/fall time */
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bcm_phy_write_misc(phydev, AFE_TX_CONFIG, 0x431);
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/* AFE_VDCA_ICTRL_0, set Iq=1101 instead of 0111 for AB symmetry */
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bcm_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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bcm_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_BRCM_CORE_BASE1E, 0x0010);
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/* DSP_TAP10, adjust bias current trim (+0% swing, +0 tick) */
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bcm_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_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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u8 count;
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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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phydev_name(phydev), phydev->drv->name, rev, patch);
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/* Dummy read to a register to workaround an issue upon reset where the
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* internal inverter may not allow the first MDIO transaction to pass
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* the MDIO management controller and make us return 0xffff for such
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* reads.
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*/
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phy_read(phydev, MII_BMSR);
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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 = bcm_phy_downshift_get(phydev, &count);
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if (ret)
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return ret;
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/* Only enable EEE if Wirespeed/downshift is disabled */
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ret = bcm_phy_set_eee(phydev, count == DOWNSHIFT_DEV_DISABLE);
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if (ret)
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return ret;
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return bcm_phy_enable_apd(phydev, true);
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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_BCM7XXX_64CLK_MDIO);
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phy_read(phydev, MII_BCM7XXX_AUX_MODE);
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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, 0, MII_BCM7XXX_SHD_MODE_2);
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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_28nm_get_tunable(struct phy_device *phydev,
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struct ethtool_tunable *tuna,
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void *data)
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{
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switch (tuna->id) {
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case ETHTOOL_PHY_DOWNSHIFT:
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return bcm_phy_downshift_get(phydev, (u8 *)data);
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default:
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return -EOPNOTSUPP;
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}
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}
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static int bcm7xxx_28nm_set_tunable(struct phy_device *phydev,
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struct ethtool_tunable *tuna,
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const void *data)
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{
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u8 count = *(u8 *)data;
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int ret;
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switch (tuna->id) {
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case ETHTOOL_PHY_DOWNSHIFT:
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ret = bcm_phy_downshift_set(phydev, count);
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break;
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default:
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return -EOPNOTSUPP;
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}
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if (ret)
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return ret;
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/* Disable EEE advertisment since this prevents the PHY
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* from successfully linking up, trigger auto-negotiation restart
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* to let the MAC decide what to do.
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*/
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ret = bcm_phy_set_eee(phydev, count == DOWNSHIFT_DEV_DISABLE);
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if (ret)
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return ret;
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return genphy_restart_aneg(phydev);
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}
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static void bcm7xxx_28nm_get_phy_stats(struct phy_device *phydev,
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struct ethtool_stats *stats, u64 *data)
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{
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struct bcm7xxx_phy_priv *priv = phydev->priv;
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bcm_phy_get_stats(phydev, priv->stats, stats, data);
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}
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static int bcm7xxx_28nm_probe(struct phy_device *phydev)
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{
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struct bcm7xxx_phy_priv *priv;
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priv = devm_kzalloc(&phydev->mdio.dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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phydev->priv = priv;
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priv->stats = devm_kcalloc(&phydev->mdio.dev,
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bcm_phy_get_sset_count(phydev), sizeof(u64),
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GFP_KERNEL);
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if (!priv->stats)
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return -ENOMEM;
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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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.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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.get_tunable = bcm7xxx_28nm_get_tunable, \
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.set_tunable = bcm7xxx_28nm_set_tunable, \
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.get_sset_count = bcm_phy_get_sset_count, \
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.get_strings = bcm_phy_get_strings, \
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.get_stats = bcm7xxx_28nm_get_phy_stats, \
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.probe = bcm7xxx_28nm_probe, \
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}
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#define BCM7XXX_40NM_EPHY(_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_BASIC_FEATURES, \
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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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}
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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_BCM7439_2, "Broadcom BCM7439 (2)"),
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BCM7XXX_28NM_GPHY(PHY_ID_BCM7445, "Broadcom BCM7445"),
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BCM7XXX_40NM_EPHY(PHY_ID_BCM7346, "Broadcom BCM7346"),
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BCM7XXX_40NM_EPHY(PHY_ID_BCM7362, "Broadcom BCM7362"),
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BCM7XXX_40NM_EPHY(PHY_ID_BCM7425, "Broadcom BCM7425"),
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BCM7XXX_40NM_EPHY(PHY_ID_BCM7429, "Broadcom BCM7429"),
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BCM7XXX_40NM_EPHY(PHY_ID_BCM7435, "Broadcom BCM7435"),
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};
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static struct mdio_device_id __maybe_unused bcm7xxx_tbl[] = {
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{ PHY_ID_BCM7250, 0xfffffff0, },
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{ PHY_ID_BCM7364, 0xfffffff0, },
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{ PHY_ID_BCM7366, 0xfffffff0, },
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{ PHY_ID_BCM7346, 0xfffffff0, },
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{ PHY_ID_BCM7362, 0xfffffff0, },
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{ PHY_ID_BCM7425, 0xfffffff0, },
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{ PHY_ID_BCM7429, 0xfffffff0, },
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{ PHY_ID_BCM7439, 0xfffffff0, },
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{ PHY_ID_BCM7435, 0xfffffff0, },
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{ PHY_ID_BCM7445, 0xfffffff0, },
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{ }
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};
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module_phy_driver(bcm7xxx_driver);
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MODULE_DEVICE_TABLE(mdio, bcm7xxx_tbl);
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MODULE_DESCRIPTION("Broadcom BCM7xxx internal PHY driver");
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Broadcom Corporation");
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