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linux/drivers/net/ethernet/amd/xgbe/xgbe-phy-v1.c
Lendacky, Thomas d7445d1f05 amd-xgbe: Add support for a KR redriver 
This patch provides support for the presence of a KR redriver chip in
between the device PCS and an external PHY.  When a redriver chip is
present the device must perform clause 73 auto-negotiation in order to
set the redriver chip for the downstream connection.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-11-13 00:56:26 -05:00

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/*
* AMD 10Gb Ethernet driver
*
* This file is available to you under your choice of the following two
* licenses:
*
* License 1: GPLv2
*
* Copyright (c) 2016 Advanced Micro Devices, Inc.
*
* This file is free software; you may copy, redistribute and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or (at
* your option) any later version.
*
* This file is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* This file incorporates work covered by the following copyright and
* permission notice:
* The Synopsys DWC ETHER XGMAC Software Driver and documentation
* (hereinafter "Software") is an unsupported proprietary work of Synopsys,
* Inc. unless otherwise expressly agreed to in writing between Synopsys
* and you.
*
* The Software IS NOT an item of Licensed Software or Licensed Product
* under any End User Software License Agreement or Agreement for Licensed
* Product with Synopsys or any supplement thereto. Permission is hereby
* granted, free of charge, to any person obtaining a copy of this software
* annotated with this license and the Software, to deal in the Software
* without restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished
* to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
* BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
*
* License 2: Modified BSD
*
* Copyright (c) 2016 Advanced Micro Devices, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Advanced Micro Devices, Inc. nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This file incorporates work covered by the following copyright and
* permission notice:
* The Synopsys DWC ETHER XGMAC Software Driver and documentation
* (hereinafter "Software") is an unsupported proprietary work of Synopsys,
* Inc. unless otherwise expressly agreed to in writing between Synopsys
* and you.
*
* The Software IS NOT an item of Licensed Software or Licensed Product
* under any End User Software License Agreement or Agreement for Licensed
* Product with Synopsys or any supplement thereto. Permission is hereby
* granted, free of charge, to any person obtaining a copy of this software
* annotated with this license and the Software, to deal in the Software
* without restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished
* to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
* BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/module.h>
#include <linux/kmod.h>
#include <linux/device.h>
#include <linux/property.h>
#include <linux/mdio.h>
#include <linux/phy.h>
#include "xgbe.h"
#include "xgbe-common.h"
#define XGBE_BLWC_PROPERTY "amd,serdes-blwc"
#define XGBE_CDR_RATE_PROPERTY "amd,serdes-cdr-rate"
#define XGBE_PQ_SKEW_PROPERTY "amd,serdes-pq-skew"
#define XGBE_TX_AMP_PROPERTY "amd,serdes-tx-amp"
#define XGBE_DFE_CFG_PROPERTY "amd,serdes-dfe-tap-config"
#define XGBE_DFE_ENA_PROPERTY "amd,serdes-dfe-tap-enable"
/* Default SerDes settings */
#define XGBE_SPEED_1000_BLWC 1
#define XGBE_SPEED_1000_CDR 0x2
#define XGBE_SPEED_1000_PLL 0x0
#define XGBE_SPEED_1000_PQ 0xa
#define XGBE_SPEED_1000_RATE 0x3
#define XGBE_SPEED_1000_TXAMP 0xf
#define XGBE_SPEED_1000_WORD 0x1
#define XGBE_SPEED_1000_DFE_TAP_CONFIG 0x3
#define XGBE_SPEED_1000_DFE_TAP_ENABLE 0x0
#define XGBE_SPEED_2500_BLWC 1
#define XGBE_SPEED_2500_CDR 0x2
#define XGBE_SPEED_2500_PLL 0x0
#define XGBE_SPEED_2500_PQ 0xa
#define XGBE_SPEED_2500_RATE 0x1
#define XGBE_SPEED_2500_TXAMP 0xf
#define XGBE_SPEED_2500_WORD 0x1
#define XGBE_SPEED_2500_DFE_TAP_CONFIG 0x3
#define XGBE_SPEED_2500_DFE_TAP_ENABLE 0x0
#define XGBE_SPEED_10000_BLWC 0
#define XGBE_SPEED_10000_CDR 0x7
#define XGBE_SPEED_10000_PLL 0x1
#define XGBE_SPEED_10000_PQ 0x12
#define XGBE_SPEED_10000_RATE 0x0
#define XGBE_SPEED_10000_TXAMP 0xa
#define XGBE_SPEED_10000_WORD 0x7
#define XGBE_SPEED_10000_DFE_TAP_CONFIG 0x1
#define XGBE_SPEED_10000_DFE_TAP_ENABLE 0x7f
/* Rate-change complete wait/retry count */
#define XGBE_RATECHANGE_COUNT 500
static const u32 xgbe_phy_blwc[] = {
XGBE_SPEED_1000_BLWC,
XGBE_SPEED_2500_BLWC,
XGBE_SPEED_10000_BLWC,
};
static const u32 xgbe_phy_cdr_rate[] = {
XGBE_SPEED_1000_CDR,
XGBE_SPEED_2500_CDR,
XGBE_SPEED_10000_CDR,
};
static const u32 xgbe_phy_pq_skew[] = {
XGBE_SPEED_1000_PQ,
XGBE_SPEED_2500_PQ,
XGBE_SPEED_10000_PQ,
};
static const u32 xgbe_phy_tx_amp[] = {
XGBE_SPEED_1000_TXAMP,
XGBE_SPEED_2500_TXAMP,
XGBE_SPEED_10000_TXAMP,
};
static const u32 xgbe_phy_dfe_tap_cfg[] = {
XGBE_SPEED_1000_DFE_TAP_CONFIG,
XGBE_SPEED_2500_DFE_TAP_CONFIG,
XGBE_SPEED_10000_DFE_TAP_CONFIG,
};
static const u32 xgbe_phy_dfe_tap_ena[] = {
XGBE_SPEED_1000_DFE_TAP_ENABLE,
XGBE_SPEED_2500_DFE_TAP_ENABLE,
XGBE_SPEED_10000_DFE_TAP_ENABLE,
};
struct xgbe_phy_data {
/* 1000/10000 vs 2500/10000 indicator */
unsigned int speed_set;
/* SerDes UEFI configurable settings.
* Switching between modes/speeds requires new values for some
* SerDes settings. The values can be supplied as device
* properties in array format. The first array entry is for
* 1GbE, second for 2.5GbE and third for 10GbE
*/
u32 blwc[XGBE_SPEEDS];
u32 cdr_rate[XGBE_SPEEDS];
u32 pq_skew[XGBE_SPEEDS];
u32 tx_amp[XGBE_SPEEDS];
u32 dfe_tap_cfg[XGBE_SPEEDS];
u32 dfe_tap_ena[XGBE_SPEEDS];
};
static void xgbe_phy_kr_training_pre(struct xgbe_prv_data *pdata)
{
XSIR0_IOWRITE_BITS(pdata, SIR0_KR_RT_1, RESET, 1);
}
static void xgbe_phy_kr_training_post(struct xgbe_prv_data *pdata)
{
XSIR0_IOWRITE_BITS(pdata, SIR0_KR_RT_1, RESET, 0);
}
static enum xgbe_mode xgbe_phy_an_outcome(struct xgbe_prv_data *pdata)
{
struct xgbe_phy_data *phy_data = pdata->phy_data;
enum xgbe_mode mode;
unsigned int ad_reg, lp_reg;
pdata->phy.lp_advertising |= ADVERTISED_Autoneg;
pdata->phy.lp_advertising |= ADVERTISED_Backplane;
/* Compare Advertisement and Link Partner register 1 */
ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE);
lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA);
if (lp_reg & 0x400)
pdata->phy.lp_advertising |= ADVERTISED_Pause;
if (lp_reg & 0x800)
pdata->phy.lp_advertising |= ADVERTISED_Asym_Pause;
if (pdata->phy.pause_autoneg) {
/* Set flow control based on auto-negotiation result */
pdata->phy.tx_pause = 0;
pdata->phy.rx_pause = 0;
if (ad_reg & lp_reg & 0x400) {
pdata->phy.tx_pause = 1;
pdata->phy.rx_pause = 1;
} else if (ad_reg & lp_reg & 0x800) {
if (ad_reg & 0x400)
pdata->phy.rx_pause = 1;
else if (lp_reg & 0x400)
pdata->phy.tx_pause = 1;
}
}
/* Compare Advertisement and Link Partner register 2 */
ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1);
lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA + 1);
if (lp_reg & 0x80)
pdata->phy.lp_advertising |= ADVERTISED_10000baseKR_Full;
if (lp_reg & 0x20) {
if (phy_data->speed_set == XGBE_SPEEDSET_2500_10000)
pdata->phy.lp_advertising |= ADVERTISED_2500baseX_Full;
else
pdata->phy.lp_advertising |= ADVERTISED_1000baseKX_Full;
}
ad_reg &= lp_reg;
if (ad_reg & 0x80) {
mode = XGBE_MODE_KR;
} else if (ad_reg & 0x20) {
if (phy_data->speed_set == XGBE_SPEEDSET_2500_10000)
mode = XGBE_MODE_KX_2500;
else
mode = XGBE_MODE_KX_1000;
} else {
mode = XGBE_MODE_UNKNOWN;
}
/* Compare Advertisement and Link Partner register 3 */
ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2);
lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA + 2);
if (lp_reg & 0xc000)
pdata->phy.lp_advertising |= ADVERTISED_10000baseR_FEC;
return mode;
}
static unsigned int xgbe_phy_an_advertising(struct xgbe_prv_data *pdata)
{
return pdata->phy.advertising;
}
static int xgbe_phy_an_config(struct xgbe_prv_data *pdata)
{
/* Nothing uniquely required for an configuration */
return 0;
}
static enum xgbe_an_mode xgbe_phy_an_mode(struct xgbe_prv_data *pdata)
{
return XGBE_AN_MODE_CL73;
}
static void xgbe_phy_pcs_power_cycle(struct xgbe_prv_data *pdata)
{
unsigned int reg;
reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1);
reg |= MDIO_CTRL1_LPOWER;
XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg);
usleep_range(75, 100);
reg &= ~MDIO_CTRL1_LPOWER;
XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg);
}
static void xgbe_phy_start_ratechange(struct xgbe_prv_data *pdata)
{
/* Assert Rx and Tx ratechange */
XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, RATECHANGE, 1);
}
static void xgbe_phy_complete_ratechange(struct xgbe_prv_data *pdata)
{
unsigned int wait;
u16 status;
/* Release Rx and Tx ratechange */
XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, RATECHANGE, 0);
/* Wait for Rx and Tx ready */
wait = XGBE_RATECHANGE_COUNT;
while (wait--) {
usleep_range(50, 75);
status = XSIR0_IOREAD(pdata, SIR0_STATUS);
if (XSIR_GET_BITS(status, SIR0_STATUS, RX_READY) &&
XSIR_GET_BITS(status, SIR0_STATUS, TX_READY))
goto rx_reset;
}
netif_dbg(pdata, link, pdata->netdev, "SerDes rx/tx not ready (%#hx)\n",
status);
rx_reset:
/* Perform Rx reset for the DFE changes */
XRXTX_IOWRITE_BITS(pdata, RXTX_REG6, RESETB_RXD, 0);
XRXTX_IOWRITE_BITS(pdata, RXTX_REG6, RESETB_RXD, 1);
}
static void xgbe_phy_kr_mode(struct xgbe_prv_data *pdata)
{
struct xgbe_phy_data *phy_data = pdata->phy_data;
unsigned int reg;
/* Set PCS to KR/10G speed */
reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL2);
reg &= ~MDIO_PCS_CTRL2_TYPE;
reg |= MDIO_PCS_CTRL2_10GBR;
XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL2, reg);
reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1);
reg &= ~MDIO_CTRL1_SPEEDSEL;
reg |= MDIO_CTRL1_SPEED10G;
XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg);
xgbe_phy_pcs_power_cycle(pdata);
/* Set SerDes to 10G speed */
xgbe_phy_start_ratechange(pdata);
XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, DATARATE, XGBE_SPEED_10000_RATE);
XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, WORDMODE, XGBE_SPEED_10000_WORD);
XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, PLLSEL, XGBE_SPEED_10000_PLL);
XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, CDR_RATE,
phy_data->cdr_rate[XGBE_SPEED_10000]);
XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, TXAMP,
phy_data->tx_amp[XGBE_SPEED_10000]);
XRXTX_IOWRITE_BITS(pdata, RXTX_REG20, BLWC_ENA,
phy_data->blwc[XGBE_SPEED_10000]);
XRXTX_IOWRITE_BITS(pdata, RXTX_REG114, PQ_REG,
phy_data->pq_skew[XGBE_SPEED_10000]);
XRXTX_IOWRITE_BITS(pdata, RXTX_REG129, RXDFE_CONFIG,
phy_data->dfe_tap_cfg[XGBE_SPEED_10000]);
XRXTX_IOWRITE(pdata, RXTX_REG22,
phy_data->dfe_tap_ena[XGBE_SPEED_10000]);
xgbe_phy_complete_ratechange(pdata);
netif_dbg(pdata, link, pdata->netdev, "10GbE KR mode set\n");
}
static void xgbe_phy_kx_2500_mode(struct xgbe_prv_data *pdata)
{
struct xgbe_phy_data *phy_data = pdata->phy_data;
unsigned int reg;
/* Set PCS to KX/1G speed */
reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL2);
reg &= ~MDIO_PCS_CTRL2_TYPE;
reg |= MDIO_PCS_CTRL2_10GBX;
XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL2, reg);
reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1);
reg &= ~MDIO_CTRL1_SPEEDSEL;
reg |= MDIO_CTRL1_SPEED1G;
XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg);
xgbe_phy_pcs_power_cycle(pdata);
/* Set SerDes to 2.5G speed */
xgbe_phy_start_ratechange(pdata);
XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, DATARATE, XGBE_SPEED_2500_RATE);
XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, WORDMODE, XGBE_SPEED_2500_WORD);
XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, PLLSEL, XGBE_SPEED_2500_PLL);
XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, CDR_RATE,
phy_data->cdr_rate[XGBE_SPEED_2500]);
XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, TXAMP,
phy_data->tx_amp[XGBE_SPEED_2500]);
XRXTX_IOWRITE_BITS(pdata, RXTX_REG20, BLWC_ENA,
phy_data->blwc[XGBE_SPEED_2500]);
XRXTX_IOWRITE_BITS(pdata, RXTX_REG114, PQ_REG,
phy_data->pq_skew[XGBE_SPEED_2500]);
XRXTX_IOWRITE_BITS(pdata, RXTX_REG129, RXDFE_CONFIG,
phy_data->dfe_tap_cfg[XGBE_SPEED_2500]);
XRXTX_IOWRITE(pdata, RXTX_REG22,
phy_data->dfe_tap_ena[XGBE_SPEED_2500]);
xgbe_phy_complete_ratechange(pdata);
netif_dbg(pdata, link, pdata->netdev, "2.5GbE KX mode set\n");
}
static void xgbe_phy_kx_1000_mode(struct xgbe_prv_data *pdata)
{
struct xgbe_phy_data *phy_data = pdata->phy_data;
unsigned int reg;
/* Set PCS to KX/1G speed */
reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL2);
reg &= ~MDIO_PCS_CTRL2_TYPE;
reg |= MDIO_PCS_CTRL2_10GBX;
XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL2, reg);
reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1);
reg &= ~MDIO_CTRL1_SPEEDSEL;
reg |= MDIO_CTRL1_SPEED1G;
XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg);
xgbe_phy_pcs_power_cycle(pdata);
/* Set SerDes to 1G speed */
xgbe_phy_start_ratechange(pdata);
XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, DATARATE, XGBE_SPEED_1000_RATE);
XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, WORDMODE, XGBE_SPEED_1000_WORD);
XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, PLLSEL, XGBE_SPEED_1000_PLL);
XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, CDR_RATE,
phy_data->cdr_rate[XGBE_SPEED_1000]);
XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, TXAMP,
phy_data->tx_amp[XGBE_SPEED_1000]);
XRXTX_IOWRITE_BITS(pdata, RXTX_REG20, BLWC_ENA,
phy_data->blwc[XGBE_SPEED_1000]);
XRXTX_IOWRITE_BITS(pdata, RXTX_REG114, PQ_REG,
phy_data->pq_skew[XGBE_SPEED_1000]);
XRXTX_IOWRITE_BITS(pdata, RXTX_REG129, RXDFE_CONFIG,
phy_data->dfe_tap_cfg[XGBE_SPEED_1000]);
XRXTX_IOWRITE(pdata, RXTX_REG22,
phy_data->dfe_tap_ena[XGBE_SPEED_1000]);
xgbe_phy_complete_ratechange(pdata);
netif_dbg(pdata, link, pdata->netdev, "1GbE KX mode set\n");
}
static enum xgbe_mode xgbe_phy_cur_mode(struct xgbe_prv_data *pdata)
{
struct xgbe_phy_data *phy_data = pdata->phy_data;
enum xgbe_mode mode;
unsigned int reg;
reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL2);
reg &= MDIO_PCS_CTRL2_TYPE;
if (reg == MDIO_PCS_CTRL2_10GBR) {
mode = XGBE_MODE_KR;
} else {
if (phy_data->speed_set == XGBE_SPEEDSET_2500_10000)
mode = XGBE_MODE_KX_2500;
else
mode = XGBE_MODE_KX_1000;
}
return mode;
}
static enum xgbe_mode xgbe_phy_switch_mode(struct xgbe_prv_data *pdata)
{
struct xgbe_phy_data *phy_data = pdata->phy_data;
enum xgbe_mode mode;
/* If we are in KR switch to KX, and vice-versa */
if (xgbe_phy_cur_mode(pdata) == XGBE_MODE_KR) {
if (phy_data->speed_set == XGBE_SPEEDSET_2500_10000)
mode = XGBE_MODE_KX_2500;
else
mode = XGBE_MODE_KX_1000;
} else {
mode = XGBE_MODE_KR;
}
return mode;
}
static enum xgbe_mode xgbe_phy_get_mode(struct xgbe_prv_data *pdata,
int speed)
{
struct xgbe_phy_data *phy_data = pdata->phy_data;
switch (speed) {
case SPEED_1000:
return (phy_data->speed_set == XGBE_SPEEDSET_1000_10000)
? XGBE_MODE_KX_1000 : XGBE_MODE_UNKNOWN;
case SPEED_2500:
return (phy_data->speed_set == XGBE_SPEEDSET_2500_10000)
? XGBE_MODE_KX_2500 : XGBE_MODE_UNKNOWN;
case SPEED_10000:
return XGBE_MODE_KR;
default:
return XGBE_MODE_UNKNOWN;
}
}
static void xgbe_phy_set_mode(struct xgbe_prv_data *pdata, enum xgbe_mode mode)
{
switch (mode) {
case XGBE_MODE_KX_1000:
xgbe_phy_kx_1000_mode(pdata);
break;
case XGBE_MODE_KX_2500:
xgbe_phy_kx_2500_mode(pdata);
break;
case XGBE_MODE_KR:
xgbe_phy_kr_mode(pdata);
break;
default:
break;
}
}
static bool xgbe_phy_check_mode(struct xgbe_prv_data *pdata,
enum xgbe_mode mode, u32 advert)
{
if (pdata->phy.autoneg == AUTONEG_ENABLE) {
if (pdata->phy.advertising & advert)
return true;
} else {
enum xgbe_mode cur_mode;
cur_mode = xgbe_phy_get_mode(pdata, pdata->phy.speed);
if (cur_mode == mode)
return true;
}
return false;
}
static bool xgbe_phy_use_mode(struct xgbe_prv_data *pdata, enum xgbe_mode mode)
{
switch (mode) {
case XGBE_MODE_KX_1000:
return xgbe_phy_check_mode(pdata, mode,
ADVERTISED_1000baseKX_Full);
case XGBE_MODE_KX_2500:
return xgbe_phy_check_mode(pdata, mode,
ADVERTISED_2500baseX_Full);
case XGBE_MODE_KR:
return xgbe_phy_check_mode(pdata, mode,
ADVERTISED_10000baseKR_Full);
default:
return false;
}
}
static bool xgbe_phy_valid_speed(struct xgbe_prv_data *pdata, int speed)
{
struct xgbe_phy_data *phy_data = pdata->phy_data;
switch (speed) {
case SPEED_1000:
if (phy_data->speed_set != XGBE_SPEEDSET_1000_10000)
return false;
return true;
case SPEED_2500:
if (phy_data->speed_set != XGBE_SPEEDSET_2500_10000)
return false;
return true;
case SPEED_10000:
return true;
default:
return false;
}
}
static int xgbe_phy_link_status(struct xgbe_prv_data *pdata, int *an_restart)
{
unsigned int reg;
*an_restart = 0;
/* Link status is latched low, so read once to clear
* and then read again to get current state
*/
reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_STAT1);
reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_STAT1);
return (reg & MDIO_STAT1_LSTATUS) ? 1 : 0;
}
static void xgbe_phy_stop(struct xgbe_prv_data *pdata)
{
/* Nothing uniquely required for stop */
}
static int xgbe_phy_start(struct xgbe_prv_data *pdata)
{
/* Nothing uniquely required for start */
return 0;
}
static int xgbe_phy_reset(struct xgbe_prv_data *pdata)
{
unsigned int reg, count;
/* Perform a software reset of the PCS */
reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1);
reg |= MDIO_CTRL1_RESET;
XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg);
count = 50;
do {
msleep(20);
reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1);
} while ((reg & MDIO_CTRL1_RESET) && --count);
if (reg & MDIO_CTRL1_RESET)
return -ETIMEDOUT;
return 0;
}
static void xgbe_phy_exit(struct xgbe_prv_data *pdata)
{
/* Nothing uniquely required for exit */
}
static int xgbe_phy_init(struct xgbe_prv_data *pdata)
{
struct xgbe_phy_data *phy_data;
int ret;
phy_data = devm_kzalloc(pdata->dev, sizeof(*phy_data), GFP_KERNEL);
if (!phy_data)
return -ENOMEM;
/* Retrieve the PHY speedset */
ret = device_property_read_u32(pdata->phy_dev, XGBE_SPEEDSET_PROPERTY,
&phy_data->speed_set);
if (ret) {
dev_err(pdata->dev, "invalid %s property\n",
XGBE_SPEEDSET_PROPERTY);
return ret;
}
switch (phy_data->speed_set) {
case XGBE_SPEEDSET_1000_10000:
case XGBE_SPEEDSET_2500_10000:
break;
default:
dev_err(pdata->dev, "invalid %s property\n",
XGBE_SPEEDSET_PROPERTY);
return -EINVAL;
}
/* Retrieve the PHY configuration properties */
if (device_property_present(pdata->phy_dev, XGBE_BLWC_PROPERTY)) {
ret = device_property_read_u32_array(pdata->phy_dev,
XGBE_BLWC_PROPERTY,
phy_data->blwc,
XGBE_SPEEDS);
if (ret) {
dev_err(pdata->dev, "invalid %s property\n",
XGBE_BLWC_PROPERTY);
return ret;
}
} else {
memcpy(phy_data->blwc, xgbe_phy_blwc,
sizeof(phy_data->blwc));
}
if (device_property_present(pdata->phy_dev, XGBE_CDR_RATE_PROPERTY)) {
ret = device_property_read_u32_array(pdata->phy_dev,
XGBE_CDR_RATE_PROPERTY,
phy_data->cdr_rate,
XGBE_SPEEDS);
if (ret) {
dev_err(pdata->dev, "invalid %s property\n",
XGBE_CDR_RATE_PROPERTY);
return ret;
}
} else {
memcpy(phy_data->cdr_rate, xgbe_phy_cdr_rate,
sizeof(phy_data->cdr_rate));
}
if (device_property_present(pdata->phy_dev, XGBE_PQ_SKEW_PROPERTY)) {
ret = device_property_read_u32_array(pdata->phy_dev,
XGBE_PQ_SKEW_PROPERTY,
phy_data->pq_skew,
XGBE_SPEEDS);
if (ret) {
dev_err(pdata->dev, "invalid %s property\n",
XGBE_PQ_SKEW_PROPERTY);
return ret;
}
} else {
memcpy(phy_data->pq_skew, xgbe_phy_pq_skew,
sizeof(phy_data->pq_skew));
}
if (device_property_present(pdata->phy_dev, XGBE_TX_AMP_PROPERTY)) {
ret = device_property_read_u32_array(pdata->phy_dev,
XGBE_TX_AMP_PROPERTY,
phy_data->tx_amp,
XGBE_SPEEDS);
if (ret) {
dev_err(pdata->dev, "invalid %s property\n",
XGBE_TX_AMP_PROPERTY);
return ret;
}
} else {
memcpy(phy_data->tx_amp, xgbe_phy_tx_amp,
sizeof(phy_data->tx_amp));
}
if (device_property_present(pdata->phy_dev, XGBE_DFE_CFG_PROPERTY)) {
ret = device_property_read_u32_array(pdata->phy_dev,
XGBE_DFE_CFG_PROPERTY,
phy_data->dfe_tap_cfg,
XGBE_SPEEDS);
if (ret) {
dev_err(pdata->dev, "invalid %s property\n",
XGBE_DFE_CFG_PROPERTY);
return ret;
}
} else {
memcpy(phy_data->dfe_tap_cfg, xgbe_phy_dfe_tap_cfg,
sizeof(phy_data->dfe_tap_cfg));
}
if (device_property_present(pdata->phy_dev, XGBE_DFE_ENA_PROPERTY)) {
ret = device_property_read_u32_array(pdata->phy_dev,
XGBE_DFE_ENA_PROPERTY,
phy_data->dfe_tap_ena,
XGBE_SPEEDS);
if (ret) {
dev_err(pdata->dev, "invalid %s property\n",
XGBE_DFE_ENA_PROPERTY);
return ret;
}
} else {
memcpy(phy_data->dfe_tap_ena, xgbe_phy_dfe_tap_ena,
sizeof(phy_data->dfe_tap_ena));
}
/* Initialize supported features */
pdata->phy.supported = SUPPORTED_Autoneg;
pdata->phy.supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
pdata->phy.supported |= SUPPORTED_Backplane;
pdata->phy.supported |= SUPPORTED_10000baseKR_Full;
switch (phy_data->speed_set) {
case XGBE_SPEEDSET_1000_10000:
pdata->phy.supported |= SUPPORTED_1000baseKX_Full;
break;
case XGBE_SPEEDSET_2500_10000:
pdata->phy.supported |= SUPPORTED_2500baseX_Full;
break;
}
if (pdata->fec_ability & MDIO_PMA_10GBR_FECABLE_ABLE)
pdata->phy.supported |= SUPPORTED_10000baseR_FEC;
pdata->phy_data = phy_data;
return 0;
}
void xgbe_init_function_ptrs_phy_v1(struct xgbe_phy_if *phy_if)
{
struct xgbe_phy_impl_if *phy_impl = &phy_if->phy_impl;
phy_impl->init = xgbe_phy_init;
phy_impl->exit = xgbe_phy_exit;
phy_impl->reset = xgbe_phy_reset;
phy_impl->start = xgbe_phy_start;
phy_impl->stop = xgbe_phy_stop;
phy_impl->link_status = xgbe_phy_link_status;
phy_impl->valid_speed = xgbe_phy_valid_speed;
phy_impl->use_mode = xgbe_phy_use_mode;
phy_impl->set_mode = xgbe_phy_set_mode;
phy_impl->get_mode = xgbe_phy_get_mode;
phy_impl->switch_mode = xgbe_phy_switch_mode;
phy_impl->cur_mode = xgbe_phy_cur_mode;
phy_impl->an_mode = xgbe_phy_an_mode;
phy_impl->an_config = xgbe_phy_an_config;
phy_impl->an_advertising = xgbe_phy_an_advertising;
phy_impl->an_outcome = xgbe_phy_an_outcome;
phy_impl->kr_training_pre = xgbe_phy_kr_training_pre;
phy_impl->kr_training_post = xgbe_phy_kr_training_post;
}
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