RE: [PATCH v3 1/2] phy: zynqmp: Add phy driver for xilinx zynqmp phy core

From: Anurag Kumar Vulisha
Date: Thu Nov 01 2018 - 13:31:31 EST

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In reply to: sundeep subbaraya: "Re: [PATCH v3 1/2] phy: zynqmp: Add phy driver for xilinx zynqmp phy core"
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Hi Sundeep,

>-----Original Message-----
>From: sundeep subbaraya [mailto:sundeep.lkml@xxxxxxxxx]
>Sent: Thursday, November 01, 2018 10:31 PM
>To: Anurag Kumar Vulisha <anuragku@xxxxxxxxxx>
>Cc: kishon@xxxxxx; Michal Simek <michals@xxxxxxxxxx>; robh+dt@xxxxxxxxxx; Mark
>Rutland <mark.rutland@xxxxxxx>; vivek.gautam@xxxxxxxxxxxxxx;
>v.anuragkumar@xxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; linux-arm-
>kernel@xxxxxxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx
>Subject: Re: [PATCH v3 1/2] phy: zynqmp: Add phy driver for xilinx zynqmp phy core
>
>Hi Anurag,
>
>On Wed, Sep 5, 2018 at 10:14 PM Anurag Kumar Vulisha
><anurag.kumar.vulisha@xxxxxxxxxx> wrote:
>>
>> ZynqMP SoC has a Gigabit Transceiver with four lanes. All the high speed
>> peripherals such as USB, SATA, PCIE, Display Port and Ethernet SGMII can
>> rely on any of the four GT lanes for PHY layer. This patch adds driver
>> for that ZynqMP GT core.
>>
>> Signed-off-by: Anurag Kumar Vulisha <anurag.kumar.vulisha@xxxxxxxxxx>
>> ---
>> Changes in v3:
>> 1. Corrected the Documentation as suggested by Vivek Gautam
>>
>> Changes in v2:
>> 1. Fixed the compilation error when compiled phy-zynqmp.c as a module
>> 2. Added CONFIG_PM macro in phy-zynqmp.c driver
>> ---
>> drivers/phy/Kconfig | 8 +
>> drivers/phy/Makefile | 1 +
>> drivers/phy/phy-zynqmp.c | 1581
>++++++++++++++++++++++++++++++++++++++++
>> include/dt-bindings/phy/phy.h | 2 +
>> include/linux/phy/phy-zynqmp.h | 52 ++
>> 5 files changed, 1644 insertions(+)
>> create mode 100644 drivers/phy/phy-zynqmp.c
>> create mode 100644 include/linux/phy/phy-zynqmp.h
>>
>> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
>> index 5c8d452..14cf3330 100644
>> --- a/drivers/phy/Kconfig
>> +++ b/drivers/phy/Kconfig
>> @@ -40,6 +40,14 @@ config PHY_XGENE
>> help
>> This option enables support for APM X-Gene SoC multi-purpose PHY.
>>
>> +config PHY_XILINX_ZYNQMP
>> + tristate "Xilinx ZynqMP PHY driver"
>> + depends on ARCH_ZYNQMP
>> + select GENERIC_PHY
>> + help
>> + Enable this to support ZynqMP High Speed Gigabit Transceiver
>> + that is part of ZynqMP SoC.
>> +
>> source "drivers/phy/allwinner/Kconfig"
>> source "drivers/phy/amlogic/Kconfig"
>> source "drivers/phy/broadcom/Kconfig"
>> diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
>> index 84e3bd9..f2a8d27 100644
>> --- a/drivers/phy/Makefile
>> +++ b/drivers/phy/Makefile
>> @@ -7,6 +7,7 @@ obj-$(CONFIG_GENERIC_PHY) += phy-core.o
>> obj-$(CONFIG_PHY_LPC18XX_USB_OTG) += phy-lpc18xx-usb-otg.o
>> obj-$(CONFIG_PHY_XGENE) += phy-xgene.o
>> obj-$(CONFIG_PHY_PISTACHIO_USB) += phy-pistachio-usb.o
>> +obj-$(CONFIG_PHY_XILINX_ZYNQMP) += phy-zynqmp.o
>> obj-$(CONFIG_ARCH_SUNXI) += allwinner/
>> obj-$(CONFIG_ARCH_MESON) += amlogic/
>> obj-$(CONFIG_LANTIQ) += lantiq/
>> diff --git a/drivers/phy/phy-zynqmp.c b/drivers/phy/phy-zynqmp.c
>> new file mode 100644
>> index 0000000..84efc3d
>> --- /dev/null
>> +++ b/drivers/phy/phy-zynqmp.c
>> @@ -0,0 +1,1581 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * phy-zynqmp.c - PHY driver for Xilinx ZynqMP GT.
>> + *
>> + * Copyright (C) 2018 Xilinx Inc.
>> + *
>> + * Author: Anurag Kumar Vulisha <anuragku@xxxxxxxxxx>
>
>This driver was initially written by me and sent for review till v2:
>https://lore.kernel.org/patchwork/patch/635317/
>I remember there was no support for reset that time and could not
>test DP.
>I guess you should add my name too.
>Subbaraya Sundeep <sundeep.lkml@xxxxxxxxx>.
>
>Thanks,
>Sundeep
>

As I was not aware of the mailing list that you have earlier initiated, I started a new thread.
I think by the time I started working on this driver you have left our company and I continued
working on this internal driver. Since I was not aware of your present mail id and the mailing
list that you have initiated , I haven't added your name. Sorry for that. Since I got your mail id
now, I will add your name too into this.

Thanks,
Anurag

>> + *
>> + * This driver is tested for USB, SATA and Display Port currently.
>> + * Other controllers PCIe and SGMII should also work but that is
>> + * experimental as of now.
>> + */
>> +
>> +#include <linux/clk.h>
>> +#include <linux/delay.h>
>> +#include <linux/io.h>
>> +#include <linux/kernel.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/of_platform.h>
>> +#include <linux/of_address.h>
>> +#include <linux/phy/phy.h>
>> +#include <linux/phy/phy-zynqmp.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/delay.h>
>> +#include <dt-bindings/phy/phy.h>
>> +#include <linux/reset.h>
>> +#include <linux/list.h>
>> +#include <linux/slab.h>
>> +
>> +/* Inter Connect Matrix parameters */
>> +#define ICM_CFG0 0x10010
>> +#define ICM_CFG1 0x10014
>> +#define ICM_CFG0_L0_MASK 0x07
>> +#define ICM_CFG0_L1_MASK 0x70
>> +#define ICM_CFG1_L2_MASK 0x07
>> +#define ICM_CFG2_L3_MASK 0x70
>> +#define ICM_CFG_SHIFT 4
>> +
>> +/* Inter Connect Matrix allowed protocols */
>> +#define ICM_PROTOCOL_PD 0x0
>> +#define ICM_PROTOCOL_PCIE 0x1
>> +#define ICM_PROTOCOL_SATA 0x2
>> +#define ICM_PROTOCOL_USB 0x3
>> +#define ICM_PROTOCOL_DP 0x4
>> +#define ICM_PROTOCOL_SGMII 0x5
>> +
>> +/* Test Mode common reset control parameters */
>> +#define TM_CMN_RST 0x10018
>> +#define TM_CMN_RST_EN 0x1
>> +#define TM_CMN_RST_SET 0x2
>> +#define TM_CMN_RST_MASK 0x3
>> +
>> +/* Refclk selection parameters */
>> +#define PLL_REF_SEL0 0x10000
>> +#define PLL_REF_OFFSET 0x4
>> +#define PLL_FREQ_MASK 0x1F
>> +#define PLL_STATUS_READ_OFFSET 0x4000
>> +#define PLL_STATUS_LOCKED 0x10
>> +
>> +/* PLL SSC step size offsets */
>> +#define L0_L0_REF_CLK_SEL 0x2860
>> +#define L0_PLL_SS_STEPS_0_LSB 0x2368
>> +#define L0_PLL_SS_STEPS_1_MSB 0x236C
>> +#define L0_PLL_SS_STEP_SIZE_0_LSB 0x2370
>> +#define L0_PLL_SS_STEP_SIZE_1 0x2374
>> +#define L0_PLL_SS_STEP_SIZE_2 0x2378
>> +#define L0_PLL_SS_STEP_SIZE_3_MSB 0x237C
>> +#define L0_PLL_STATUS_READ_1 0x23E4
>> +
>> +/* SSC step size parameters */
>> +#define STEP_SIZE_OFFSET 0x4000
>> +#define STEP_SIZE_0_MASK 0xFF
>> +#define STEP_SIZE_1_MASK 0xFF
>> +#define STEP_SIZE_2_MASK 0xFF
>> +#define STEP_SIZE_3_MASK 0x3
>> +#define STEP_SIZE_SHIFT 8
>> +#define FORCE_STEP_SIZE 0x10
>> +#define FORCE_STEPS 0x20
>> +#define STEPS_OFFSET 0x4000
>> +#define STEPS_0_MASK 0xFF
>> +#define STEPS_1_MASK 0x07
>> +
>> +/* BG calibration parameters */
>> +#define BGCAL_REF_SEL 0x10028
>> +#define BGCAL_REF_VALUE 0x0C
>> +
>> +/* Calibration digital logic parameters */
>> +#define L3_TM_CALIB_DIG19 0xEC4C
>> +#define L3_CALIB_DONE_STATUS 0xEF14
>> +#define L3_TM_CALIB_DIG18 0xEC48
>> +#define L3_TM_CALIB_DIG19_NSW 0x07
>> +#define L3_TM_CALIB_DIG18_NSW 0xE0
>> +#define L3_TM_OVERRIDE_NSW_CODE 0x20
>> +#define L3_CALIB_DONE 0x02
>> +#define L3_NSW_SHIFT 5
>> +#define L3_NSW_PIPE_SHIFT 4
>> +#define L3_NSW_CALIB_SHIFT 3
>> +
>> +/* DN Resistor calibration code parameters */
>> +#define L0_TXPMA_ST_3 0x0B0C
>> +#define L0_DN_CALIB_CODE 0x3F
>> +
>> +/* PLL Test Mode register parameters */
>> +#define L0_TM_PLL_DIG_37 0x2094
>> +#define L0_TM_PLL_DIG_37_OFFSET 0x4000
>> +#define L0_TM_COARSE_CODE_LIMIT 0x10
>> +
>> +/* PCS control parameters */
>> +#define L0_TM_DIG_6 0x106C
>> +#define L0_TX_DIG_61 0x00F4
>> +#define L0_TM_DIG_6_OFFSET 0x4000
>> +#define L0_TX_DIG_61_OFFSET 0x4000
>> +#define L0_TM_DIS_DESCRAMBLE_DECODER 0x0F
>> +#define L0_TM_DISABLE_SCRAMBLE_ENCODER 0x0F
>> +
>> +/* TX De-emphasis parameters */
>> +#define L0_TX_ANA_TM_18 0x0048
>> +#define L0_TX_ANA_TM_118 0x01D8
>> +#define L0_TX_ANA_TM_18_OFFSET 0x4000
>> +#define L0_TX_ANA_TM_118_OFFSET 0x4000
>> +#define L0_TX_ANA_TM_118_FORCE_17_0 BIT(0)
>> +
>> +/* PMA control parameters */
>> +#define L0_TXPMD_TM_45 0x0CB4
>> +#define L0_TXPMD_TM_48 0x0CC0
>> +#define L0_TXPMD_TM_45_OFFSET 0x4000
>> +#define L0_TXPMD_TM_48_OFFSET 0x4000
>> +#define L0_TXPMD_TM_45_OVER_DP_MAIN BIT(0)
>> +#define L0_TXPMD_TM_45_ENABLE_DP_MAIN BIT(1)
>> +#define L0_TXPMD_TM_45_OVER_DP_POST1 BIT(2)
>> +#define L0_TXPMD_TM_45_ENABLE_DP_POST1 BIT(3)
>> +#define L0_TXPMD_TM_45_OVER_DP_POST2 BIT(4)
>> +#define L0_TXPMD_TM_45_ENABLE_DP_POST2 BIT(5)
>> +
>> +/* Bus width parameters */
>> +#define TX_PROT_BUS_WIDTH 0x10040
>> +#define RX_PROT_BUS_WIDTH 0x10044
>> +#define PROT_BUS_WIDTH_10 0x0
>> +#define PROT_BUS_WIDTH_20 0x1
>> +#define PROT_BUS_WIDTH_40 0x2
>> +#define PROT_BUS_WIDTH_SHIFT 2
>> +
>> +/* Max number of GT lanes */
>> +#define MAX_LANES 4
>> +
>> +/* Max Allowed refclk frequencies */
>> +#define MAX_REFCLK 13
>> +
>> +/* Lane CLK sharing mask */
>> +#define LANE_CLK_SHARE_MASK 0x8F
>> +
>> +/* SIOU SATA control register */
>> +#define SATA_CONTROL_OFFSET 0x0100
>> +
>> +/* Total number of controllers */
>> +#define CONTROLLERS_PER_LANE 5
>> +
>> +/* USB pipe control parameters */
>> +#define PIPE_CLK_OFFSET 0x7c
>> +#define PIPE_POWER_OFFSET 0x80
>> +#define PIPE_CLK_ON 1
>> +#define PIPE_CLK_OFF 0
>> +#define PIPE_POWER_ON 1
>> +#define PIPE_POWER_OFF 0
>> +
>> +/* Protocol Type Pparameters */
>> +#define XPSGTR_TYPE_USB0 0 /* USB controller 0 */
>> +#define XPSGTR_TYPE_USB1 1 /* USB controller 1 */
>> +#define XPSGTR_TYPE_SATA_0 2 /* SATA controller lane 0 */
>> +#define XPSGTR_TYPE_SATA_1 3 /* SATA controller lane 1 */
>> +#define XPSGTR_TYPE_PCIE_0 4 /* PCIe controller lane 0 */
>> +#define XPSGTR_TYPE_PCIE_1 5 /* PCIe controller lane 1 */
>> +#define XPSGTR_TYPE_PCIE_2 6 /* PCIe controller lane 2 */
>> +#define XPSGTR_TYPE_PCIE_3 7 /* PCIe controller lane 3 */
>> +#define XPSGTR_TYPE_DP_0 8 /* Display Port controller lane 0 */
>> +#define XPSGTR_TYPE_DP_1 9 /* Display Port controller lane 1 */
>> +#define XPSGTR_TYPE_SGMII0 10 /* Ethernet SGMII controller 0 */
>> +#define XPSGTR_TYPE_SGMII1 11 /* Ethernet SGMII controller 1 */
>> +#define XPSGTR_TYPE_SGMII2 12 /* Ethernet SGMII controller 2 */
>> +#define XPSGTR_TYPE_SGMII3 13 /* Ethernet SGMII controller 3 */
>> +
>> +/* Timeout values */
>> +#define RST_TIMEOUT_MS 1000
>> +#define TIMEOUT_US 1000
>> +
>> +/*
>> + * This table holds the valid combinations of controllers and
>> + * lanes(Interconnect Matrix).
>> + */
>> +static unsigned int icm_matrix[MAX_LANES][CONTROLLERS_PER_LANE] = {
>> + { XPSGTR_TYPE_PCIE_0, XPSGTR_TYPE_SATA_0, XPSGTR_TYPE_USB0,
>> + XPSGTR_TYPE_DP_1, XPSGTR_TYPE_SGMII0 },
>> + { XPSGTR_TYPE_PCIE_1, XPSGTR_TYPE_SATA_1, XPSGTR_TYPE_USB0,
>> + XPSGTR_TYPE_DP_0, XPSGTR_TYPE_SGMII1 },
>> + { XPSGTR_TYPE_PCIE_2, XPSGTR_TYPE_SATA_0, XPSGTR_TYPE_USB0,
>> + XPSGTR_TYPE_DP_1, XPSGTR_TYPE_SGMII2 },
>> + { XPSGTR_TYPE_PCIE_3, XPSGTR_TYPE_SATA_1, XPSGTR_TYPE_USB1,
>> + XPSGTR_TYPE_DP_0, XPSGTR_TYPE_SGMII3 }
>> +};
>> +
>> +/* Allowed PLL reference clock frequencies */
>> +enum pll_frequencies {
>> + REF_19_2M = 0,
>> + REF_20M,
>> + REF_24M,
>> + REF_26M,
>> + REF_27M,
>> + REF_38_4M,
>> + REF_40M,
>> + REF_52M,
>> + REF_100M,
>> + REF_108M,
>> + REF_125M,
>> + REF_135M,
>> + REF_150M,
>> +};
>> +
>> +/**
>> + * struct xpsgtr_phy - representation of a lane
>> + * @phy: pointer to the kernel PHY device
>> + * @type: controller which uses this lane
>> + * @lane: lane number
>> + * @protocol: protocol in which the lane operates
>> + * @ref_clk: enum of allowed ref clock rates for this lane PLL
>> + * @pll_lock: PLL status
>> + * @skip_phy_init: skip phy_init() if true
>> + * @data: pointer to hold private data
>> + * @refclk_rate: PLL reference clock frequency
>> + * @share_laneclk: lane number of the clock to be shared
>> + */
>> +struct xpsgtr_phy {
>> + struct phy *phy;
>> + u8 type;
>> + u8 lane;
>> + u8 protocol;
>> + enum pll_frequencies ref_clk;
>> + bool pll_lock;
>> + bool skip_phy_init;
>> + void *data;
>> + u32 refclk_rate;
>> + u32 share_laneclk;
>> +};
>> +
>> +/**
>> + * struct xpsgtr_ssc - structure to hold SSC settings for a lane
>> + * @refclk_rate: PLL reference clock frequency
>> + * @pll_ref_clk: value to be written to register for corresponding ref clk rate
>> + * @steps: number of steps of SSC (Spread Spectrum Clock)
>> + * @step_size: step size of each step
>> + */
>> +struct xpsgtr_ssc {
>> + u32 refclk_rate;
>> + u8 pll_ref_clk;
>> + u32 steps;
>> + u32 step_size;
>> +};
>> +
>> +/* lookup table to hold all settings needed for a ref clock frequency */
>> +static struct xpsgtr_ssc ssc_lookup[MAX_REFCLK] = {
>> + {19200000, 0x05, 608, 264020},
>> + {20000000, 0x06, 634, 243454},
>> + {24000000, 0x07, 760, 168973},
>> + {26000000, 0x08, 824, 143860},
>> + {27000000, 0x09, 856, 86551},
>> + {38400000, 0x0A, 1218, 65896},
>> + {40000000, 0x0B, 634, 243454},
>> + {52000000, 0x0C, 824, 143860},
>> + {100000000, 0x0D, 1058, 87533},
>> + {108000000, 0x0E, 856, 86551},
>> + {125000000, 0x0F, 992, 119497},
>> + {135000000, 0x10, 1070, 55393},
>> + {150000000, 0x11, 792, 187091}
>> +};
>> +
>> +/**
>> + * struct xpsgtr_dev - representation of a ZynMP GT device
>> + * @dev: pointer to device
>> + * @serdes: serdes base address
>> + * @siou: siou base address
>> + * @gtr_mutex: mutex for locking
>> + * @phys: pointer to all the lanes
>> + * @tx_term_fix: fix for GT issue
>> + * @saved_icm_cfg0: stored value of ICM CFG0 register
>> + * @saved_icm_cfg1: stored value of ICM CFG1 register
>> + * @sata_rst: a reset control for SATA
>> + * @dp_rst: a reset control for DP
>> + * @usb0_crst: a reset control for usb0 core
>> + * @usb1_crst: a reset control for usb1 core
>> + * @usb0_hibrst: a reset control for usb0 hibernation module
>> + * @usb1_hibrst: a reset control for usb1 hibernation module
>> + * @usb0_apbrst: a reset control for usb0 apb bus
>> + * @usb1_apbrst: a reset control for usb1 apb bus
>> + * @gem0_rst: a reset control for gem0
>> + * @gem1_rst: a reset control for gem1
>> + * @gem2_rst: a reset control for gem2
>> + * @gem3_rst: a reset control for gem3
>> + */
>> +struct xpsgtr_dev {
>> + struct device *dev;
>> + void __iomem *serdes;
>> + void __iomem *siou;
>> + struct mutex gtr_mutex; /* mutex for locking */
>> + struct xpsgtr_phy **phys;
>> + bool tx_term_fix;
>> + unsigned int saved_icm_cfg0;
>> + unsigned int saved_icm_cfg1;
>> + struct reset_control *sata_rst;
>> + struct reset_control *dp_rst;
>> + struct reset_control *usb0_crst;
>> + struct reset_control *usb1_crst;
>> + struct reset_control *usb0_hibrst;
>> + struct reset_control *usb1_hibrst;
>> + struct reset_control *usb0_apbrst;
>> + struct reset_control *usb1_apbrst;
>> + struct reset_control *gem0_rst;
>> + struct reset_control *gem1_rst;
>> + struct reset_control *gem2_rst;
>> + struct reset_control *gem3_rst;
>> +};
>> +
>> +/**
>> + * xpsgtr_override_deemph - override PIPE TX de-emphasis
>> + * @phy: pointer to phy
>> + * @plvl: pre-emphasis level
>> + * @vlvl: voltage swing level
>> + *
>> + * Return: None
>> + */
>> +void xpsgtr_override_deemph(struct phy *phy, u8 plvl, u8 vlvl)
>> +{
>> + struct xpsgtr_phy *gtr_phy = phy_get_drvdata(phy);
>> + struct xpsgtr_dev *gtr_dev = gtr_phy->data;
>> + static u8 pe[4][4] = { { 0x2, 0x2, 0x2, 0x2 },
>> + { 0x1, 0x1, 0x1, 0xFF },
>> + { 0x0, 0x0, 0xFF, 0xFF },
>> + { 0xFF, 0xFF, 0xFF, 0xFF } };
>> +
>> + writel(pe[plvl][vlvl],
>> + gtr_dev->serdes + gtr_phy->lane * L0_TX_ANA_TM_18_OFFSET +
>> + L0_TX_ANA_TM_18);
>> +}
>> +EXPORT_SYMBOL_GPL(xpsgtr_override_deemph);
>> +
>> +/**
>> + * xpsgtr_margining_factor - adjust margining factor value
>> + * @phy: pointer to phy
>> + * @plvl: pre-emphasis level
>> + * @vlvl: voltage swing level
>> + *
>> + * Return: None
>> + */
>> +void xpsgtr_margining_factor(struct phy *phy, u8 plvl, u8 vlvl)
>> +{
>> + struct xpsgtr_phy *gtr_phy = phy_get_drvdata(phy);
>> + struct xpsgtr_dev *gtr_dev = gtr_phy->data;
>> + static u8 vs[4][4] = { { 0x2a, 0x27, 0x24, 0x20 },
>> + { 0x27, 0x23, 0x20, 0xFF },
>> + { 0x24, 0x20, 0xFF, 0xFF },
>> + { 0xFF, 0xFF, 0xFF, 0xFF } };
>> +
>> + writel(vs[plvl][vlvl],
>> + gtr_dev->serdes + gtr_phy->lane * L0_TXPMD_TM_48_OFFSET +
>> + L0_TXPMD_TM_48);
>> +}
>> +EXPORT_SYMBOL_GPL(xpsgtr_margining_factor);
>> +
>> +/**
>> + * xpsgtr_configure_pll - configures SSC settings for a lane
>> + * @gtr_phy: pointer to lane
>> + *
>> + * Return: None
>> + */
>> +static void xpsgtr_configure_pll(struct xpsgtr_phy *gtr_phy)
>> +{
>> + struct xpsgtr_dev *gtr_dev = gtr_phy->data;
>> + u32 reg;
>> + u32 offset;
>> + u32 steps;
>> + u32 size;
>> + u8 pll_ref_clk;
>> +
>> + steps = ssc_lookup[gtr_phy->ref_clk].steps;
>> + size = ssc_lookup[gtr_phy->ref_clk].step_size;
>> + pll_ref_clk = ssc_lookup[gtr_phy->ref_clk].pll_ref_clk;
>> +
>> + offset = gtr_phy->lane * PLL_REF_OFFSET + PLL_REF_SEL0;
>> + reg = readl(gtr_dev->serdes + offset);
>> + reg = (reg & ~PLL_FREQ_MASK) | pll_ref_clk;
>> + writel(reg, gtr_dev->serdes + offset);
>> +
>> + /* Enable lane clock sharing, if required */
>> + if (gtr_phy->share_laneclk != gtr_phy->lane) {
>> + /* Lane3 Ref Clock Selection Register */
>> + offset = gtr_phy->lane * PLL_REF_OFFSET + L0_L0_REF_CLK_SEL;
>> + reg = readl(gtr_dev->serdes + offset);
>> + reg = (reg & ~LANE_CLK_SHARE_MASK) |
>> + (1 << gtr_phy->share_laneclk);
>> + writel(reg, gtr_dev->serdes + offset);
>> + }
>> +
>> + /* SSC step size [7:0] */
>> + offset = gtr_phy->lane * STEP_SIZE_OFFSET + L0_PLL_SS_STEP_SIZE_0_LSB;
>> + reg = readl(gtr_dev->serdes + offset);
>> + reg = (reg & ~STEP_SIZE_0_MASK) |
>> + (size & STEP_SIZE_0_MASK);
>> + writel(reg, gtr_dev->serdes + offset);
>> +
>> + /* SSC step size [15:8] */
>> + size = size >> STEP_SIZE_SHIFT;
>> + offset = gtr_phy->lane * STEP_SIZE_OFFSET + L0_PLL_SS_STEP_SIZE_1;
>> + reg = readl(gtr_dev->serdes + offset);
>> + reg = (reg & ~STEP_SIZE_1_MASK) |
>> + (size & STEP_SIZE_1_MASK);
>> + writel(reg, gtr_dev->serdes + offset);
>> +
>> + /* SSC step size [23:16] */
>> + size = size >> STEP_SIZE_SHIFT;
>> + offset = gtr_phy->lane * STEP_SIZE_OFFSET + L0_PLL_SS_STEP_SIZE_2;
>> + reg = readl(gtr_dev->serdes + offset);
>> + reg = (reg & ~STEP_SIZE_2_MASK) |
>> + (size & STEP_SIZE_2_MASK);
>> + writel(reg, gtr_dev->serdes + offset);
>> +
>> + /* SSC steps [7:0] */
>> + offset = gtr_phy->lane * STEPS_OFFSET + L0_PLL_SS_STEPS_0_LSB;
>> + reg = readl(gtr_dev->serdes + offset);
>> + reg = (reg & ~STEPS_0_MASK) |
>> + (steps & STEPS_0_MASK);
>> + writel(reg, gtr_dev->serdes + offset);
>> +
>> + /* SSC steps [10:8] */
>> + steps = steps >> STEP_SIZE_SHIFT;
>> + offset = gtr_phy->lane * STEPS_OFFSET + L0_PLL_SS_STEPS_1_MSB;
>> + reg = readl(gtr_dev->serdes + offset);
>> + reg = (reg & ~STEPS_1_MASK) |
>> + (steps & STEPS_1_MASK);
>> + writel(reg, gtr_dev->serdes + offset);
>> +
>> + /* SSC step size [24:25] */
>> + size = size >> STEP_SIZE_SHIFT;
>> + offset = gtr_phy->lane * STEP_SIZE_OFFSET + L0_PLL_SS_STEP_SIZE_3_MSB;
>> + reg = readl(gtr_dev->serdes + offset);
>> + reg = (reg & ~STEP_SIZE_3_MASK) |
>> + (size & STEP_SIZE_3_MASK);
>> + reg |= FORCE_STEP_SIZE | FORCE_STEPS;
>> + writel(reg, gtr_dev->serdes + offset);
>> +}
>> +
>> +/**
>> + * xpsgtr_lane_setprotocol - sets required protocol in ICM registers
>> + * @gtr_phy: pointer to lane
>> + *
>> + * Return: None
>> + */
>> +static void xpsgtr_lane_setprotocol(struct xpsgtr_phy *gtr_phy)
>> +{
>> + struct xpsgtr_dev *gtr_dev = gtr_phy->data;
>> + u32 reg;
>> + u8 protocol = gtr_phy->protocol;
>> +
>> + switch (gtr_phy->lane) {
>> + case 0:
>> + reg = readl(gtr_dev->serdes + ICM_CFG0);
>> + reg = (reg & ~ICM_CFG0_L0_MASK) | protocol;
>> + writel(reg, gtr_dev->serdes + ICM_CFG0);
>> + break;
>> + case 1:
>> + reg = readl(gtr_dev->serdes + ICM_CFG0);
>> + reg = (reg & ~ICM_CFG0_L1_MASK) | (protocol << ICM_CFG_SHIFT);
>> + writel(reg, gtr_dev->serdes + ICM_CFG0);
>> + break;
>> + case 2:
>> + reg = readl(gtr_dev->serdes + ICM_CFG1);
>> + reg = (reg & ~ICM_CFG0_L0_MASK) | protocol;
>> + writel(reg, gtr_dev->serdes + ICM_CFG1);
>> + break;
>> + case 3:
>> + reg = readl(gtr_dev->serdes + ICM_CFG1);
>> + reg = (reg & ~ICM_CFG0_L1_MASK) | (protocol << ICM_CFG_SHIFT);
>> + writel(reg, gtr_dev->serdes + ICM_CFG1);
>> + break;
>> + default:
>> + /* We already checked 0 <= lane <= 3 */
>> + break;
>> + }
>> +}
>> +
>> +/**
>> + * xpsgtr_get_ssc - gets the required ssc settings based on clk rate
>> + * @gtr_phy: pointer to lane
>> + *
>> + * Return: 0 on success or error on failure
>> + */
>> +static int xpsgtr_get_ssc(struct xpsgtr_phy *gtr_phy)
>> +{
>> + u32 i;
>> +
>> + /*
>> + * Assign the required spread spectrum(SSC) settings
>> + * from lane refernce clk rate
>> + */
>> + for (i = 0 ; i < ARRAY_SIZE(ssc_lookup); i++) {
>> + if (gtr_phy->refclk_rate == ssc_lookup[i].refclk_rate) {
>> + gtr_phy->ref_clk = i;
>> + return 0;
>> + }
>> + }
>> +
>> + /* Did not get valid ssc settings*/
>> + return -EINVAL;
>> +}
>> +
>> +/**
>> + * xpsgtr_configure_lane - configures SSC settings for a lane
>> + * @gtr_phy: pointer to lane
>> + *
>> + * Return: 0 on success or error on failure
>> + */
>> +static int xpsgtr_configure_lane(struct xpsgtr_phy *gtr_phy)
>> +{
>> + switch (gtr_phy->type) {
>> + case XPSGTR_TYPE_USB0:
>> + case XPSGTR_TYPE_USB1:
>> + gtr_phy->protocol = ICM_PROTOCOL_USB;
>> + break;
>> + case XPSGTR_TYPE_SATA_0:
>> + case XPSGTR_TYPE_SATA_1:
>> + gtr_phy->protocol = ICM_PROTOCOL_SATA;
>> + break;
>> + case XPSGTR_TYPE_DP_0:
>> + case XPSGTR_TYPE_DP_1:
>> + gtr_phy->protocol = ICM_PROTOCOL_DP;
>> + break;
>> + case XPSGTR_TYPE_PCIE_0:
>> + case XPSGTR_TYPE_PCIE_1:
>> + case XPSGTR_TYPE_PCIE_2:
>> + case XPSGTR_TYPE_PCIE_3:
>> + gtr_phy->protocol = ICM_PROTOCOL_PCIE;
>> + break;
>> + case XPSGTR_TYPE_SGMII0:
>> + case XPSGTR_TYPE_SGMII1:
>> + case XPSGTR_TYPE_SGMII2:
>> + case XPSGTR_TYPE_SGMII3:
>> + gtr_phy->protocol = ICM_PROTOCOL_SGMII;
>> + break;
>> + default:
>> + gtr_phy->protocol = ICM_PROTOCOL_PD;
>> + break;
>> + }
>> +
>> + /* Get SSC settinsg for refernce clk rate */
>> + if (xpsgtr_get_ssc(gtr_phy) < 0)
>> + return -EINVAL;
>> +
>> + return 0;
>> +}
>> +
>> +/**
>> + * xpsgtr_config_usbpipe - configures the PIPE3 signals for USB
>> + * @gtr_phy: pointer to gtr phy device
>> + *
>> + * Return: None
>> + */
>> +static void xpsgtr_config_usbpipe(struct xpsgtr_phy *gtr_phy)
>> +{
>> + struct phy *phy = gtr_phy->phy;
>> + struct xpsgtr_dev *gtr_dev = gtr_phy->data;
>> + void __iomem *regs = dev_get_platdata(&phy->dev);
>> +
>> + if (regs) {
>> + /* Set PIPE power present signal */
>> + writel(PIPE_POWER_ON, regs + PIPE_POWER_OFFSET);
>> +
>> + /* Clear PIPE CLK signal */
>> + writel(PIPE_CLK_OFF, regs + PIPE_CLK_OFFSET);
>> + } else {
>> + dev_info(gtr_dev->dev,
>> + "%s: No valid Platform_data found\n", __func__);
>> + }
>> +}
>> +
>> +/**
>> + * xpsgtr_reset_assert - asserts reset using reset framework
>> + * @rstc: pointer to reset_control
>> + *
>> + * Return: 0 on success or error on failure
>> + */
>> +static int xpsgtr_reset_assert(struct reset_control *rstc)
>> +{
>> + unsigned long loop_time = msecs_to_jiffies(RST_TIMEOUT_MS);
>> + unsigned long timeout;
>> +
>> + reset_control_assert(rstc);
>> +
>> + /* wait until reset is asserted or timeout */
>> + timeout = jiffies + loop_time;
>> +
>> + while (!time_after_eq(jiffies, timeout)) {
>> + if (reset_control_status(rstc) > 0)
>> + return 0;
>> +
>> + cpu_relax();
>> + }
>> +
>> + return -ETIMEDOUT;
>> +}
>> +
>> +/**
>> + * xpsgtr_reset_release - de-asserts reset using reset framework
>> + * @rstc: pointer to reset_control
>> + *
>> + * Return: 0 on success or error on failure
>> + */
>> +static int xpsgtr_reset_release(struct reset_control *rstc)
>> +{
>> + unsigned long loop_time = msecs_to_jiffies(RST_TIMEOUT_MS);
>> + unsigned long timeout;
>> +
>> + reset_control_deassert(rstc);
>> +
>> + /* wait until reset is de-asserted or timeout */
>> + timeout = jiffies + loop_time;
>> + while (!time_after_eq(jiffies, timeout)) {
>> + if (!reset_control_status(rstc))
>> + return 0;
>> +
>> + cpu_relax();
>> + }
>> +
>> + return -ETIMEDOUT;
>> +}
>> +
>> +/**
>> + * xpsgtr_controller_reset - puts controller in reset
>> + * @gtr_phy: pointer to lane
>> + *
>> + * Return: 0 on success or error on failure
>> + */
>> +static int xpsgtr_controller_reset(struct xpsgtr_phy *gtr_phy)
>> +{
>> + struct xpsgtr_dev *gtr_dev = gtr_phy->data;
>> + int ret;
>> +
>> + switch (gtr_phy->type) {
>> + case XPSGTR_TYPE_USB0:
>> + ret = xpsgtr_reset_assert(gtr_dev->usb0_crst);
>> + if (ret != 0)
>> + break;
>> +
>> + ret = xpsgtr_reset_assert(gtr_dev->usb0_hibrst);
>> + if (ret != 0)
>> + break;
>> +
>> + ret = xpsgtr_reset_assert(gtr_dev->usb0_apbrst);
>> + break;
>> + case XPSGTR_TYPE_USB1:
>> + ret = xpsgtr_reset_assert(gtr_dev->usb1_crst);
>> + if (ret != 0)
>> + break;
>> +
>> + ret = xpsgtr_reset_assert(gtr_dev->usb1_hibrst);
>> + if (ret != 0)
>> + break;
>> +
>> + ret = xpsgtr_reset_assert(gtr_dev->usb1_apbrst);
>> + break;
>> + case XPSGTR_TYPE_SATA_0:
>> + case XPSGTR_TYPE_SATA_1:
>> + ret = xpsgtr_reset_assert(gtr_dev->sata_rst);
>> + break;
>> + case XPSGTR_TYPE_DP_0:
>> + case XPSGTR_TYPE_DP_1:
>> + ret = xpsgtr_reset_assert(gtr_dev->dp_rst);
>> + break;
>> + case XPSGTR_TYPE_SGMII0:
>> + ret = xpsgtr_reset_assert(gtr_dev->gem0_rst);
>> + break;
>> + case XPSGTR_TYPE_SGMII1:
>> + ret = xpsgtr_reset_assert(gtr_dev->gem1_rst);
>> + break;
>> + case XPSGTR_TYPE_SGMII2:
>> + ret = xpsgtr_reset_assert(gtr_dev->gem2_rst);
>> + break;
>> + case XPSGTR_TYPE_SGMII3:
>> + ret = xpsgtr_reset_assert(gtr_dev->gem3_rst);
>> + break;
>> + default:
>> + ret = -EINVAL;
>> + break;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +/**
>> + * xpsgtr_controller_release_reset - releases controller from reset
>> + * @gtr_phy: pointer to lane
>> + *
>> + * Return: 0 on success or error on failure
>> + */
>> +static int xpsgtr_controller_release_reset(struct xpsgtr_phy *gtr_phy)
>> +{
>> + struct xpsgtr_dev *gtr_dev = gtr_phy->data;
>> + int ret;
>> +
>> + switch (gtr_phy->type) {
>> + case XPSGTR_TYPE_USB0:
>> + ret = xpsgtr_reset_release(gtr_dev->usb0_apbrst);
>> + if (ret != 0)
>> + break;
>> +
>> + /* Config PIPE3 signals after releasing APB reset */
>> + xpsgtr_config_usbpipe(gtr_phy);
>> +
>> + ret = xpsgtr_reset_release(gtr_dev->usb0_crst);
>> + if (ret != 0)
>> + break;
>> +
>> + ret = xpsgtr_reset_release(gtr_dev->usb0_hibrst);
>> + break;
>> + case XPSGTR_TYPE_USB1:
>> + ret = xpsgtr_reset_release(gtr_dev->usb1_apbrst);
>> + if (ret != 0)
>> + break;
>> +
>> + /* Config PIPE3 signals after releasing APB reset */
>> + xpsgtr_config_usbpipe(gtr_phy);
>> +
>> + ret = xpsgtr_reset_release(gtr_dev->usb1_crst);
>> + if (ret != 0)
>> + break;
>> +
>> + ret = xpsgtr_reset_release(gtr_dev->usb1_hibrst);
>> + break;
>> + case XPSGTR_TYPE_SATA_0:
>> + case XPSGTR_TYPE_SATA_1:
>> + ret = xpsgtr_reset_release(gtr_dev->sata_rst);
>> + break;
>> + case XPSGTR_TYPE_DP_0:
>> + case XPSGTR_TYPE_DP_1:
>> + ret = xpsgtr_reset_release(gtr_dev->dp_rst);
>> + break;
>> + case XPSGTR_TYPE_SGMII0:
>> + ret = xpsgtr_reset_release(gtr_dev->gem0_rst);
>> + break;
>> + case XPSGTR_TYPE_SGMII1:
>> + ret = xpsgtr_reset_release(gtr_dev->gem1_rst);
>> + break;
>> + case XPSGTR_TYPE_SGMII2:
>> + ret = xpsgtr_reset_release(gtr_dev->gem2_rst);
>> + break;
>> + case XPSGTR_TYPE_SGMII3:
>> + ret = xpsgtr_reset_release(gtr_dev->gem3_rst);
>> + break;
>> + default:
>> + ret = -EINVAL;
>> + break;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +/**
>> + * xpsgtr_usb_rst_assert - assert USB core reset
>> + * @phy: pointer to phy
>> + *
>> + * Return: 0 on success or error on failure
>> + */
>> +int xpsgtr_usb_crst_assert(struct phy *phy)
>> +{
>> + struct xpsgtr_phy *gtr_phy = phy_get_drvdata(phy);
>> + struct xpsgtr_dev *gtr_dev = gtr_phy->data;
>> + int ret;
>> +
>> + switch (gtr_phy->type) {
>> + case XPSGTR_TYPE_USB0:
>> + ret = xpsgtr_reset_assert(gtr_dev->usb0_crst);
>> + break;
>> + case XPSGTR_TYPE_USB1:
>> + ret = xpsgtr_reset_assert(gtr_dev->usb1_crst);
>> + break;
>> + default:
>> + ret = -EINVAL;
>> + break;
>> + }
>> +
>> + return ret;
>> +}
>> +EXPORT_SYMBOL(xpsgtr_usb_crst_assert);
>> +
>> +/**
>> + * xpsgtr_usb_rst_release - release USB core reset
>> + * @phy: pointer to phy
>> + *
>> + * Return: 0 on success or error on failure
>> + */
>> +int xpsgtr_usb_crst_release(struct phy *phy)
>> +{
>> + struct xpsgtr_phy *gtr_phy = phy_get_drvdata(phy);
>> + struct xpsgtr_dev *gtr_dev = gtr_phy->data;
>> + int ret;
>> +
>> + switch (gtr_phy->type) {
>> + case XPSGTR_TYPE_USB0:
>> + ret = xpsgtr_reset_release(gtr_dev->usb0_crst);
>> + break;
>> + case XPSGTR_TYPE_USB1:
>> + ret = xpsgtr_reset_release(gtr_dev->usb1_crst);
>> + break;
>> + default:
>> + ret = -EINVAL;
>> + break;
>> + }
>> +
>> + return ret;
>> +}
>> +EXPORT_SYMBOL(xpsgtr_usb_crst_release);
>> +
>> +/**
>> + * xpsgtr_wait_pll_lock - Waits until PLL is locked or timedout
>> + * @phy: pointer to phy
>> + *
>> + * Return: 0 on success or error on failure
>> + */
>> +int xpsgtr_wait_pll_lock(struct phy *phy)
>> +{
>> + struct xpsgtr_phy *gtr_phy = phy_get_drvdata(phy);
>> + struct xpsgtr_dev *gtr_dev = gtr_phy->data;
>> + u32 offset, reg;
>> + u32 timeout = TIMEOUT_US;
>> + int ret = 0;
>> +
>> + /* Check pll is locked */
>> + offset = gtr_phy->lane * PLL_STATUS_READ_OFFSET +
>L0_PLL_STATUS_READ_1;
>> + dev_dbg(gtr_dev->dev, "Waiting for PLL lock...\n");
>> +
>> + do {
>> + reg = readl(gtr_dev->serdes + offset);
>> + if ((reg & PLL_STATUS_LOCKED) == PLL_STATUS_LOCKED)
>> + break;
>> +
>> + if (!--timeout) {
>> + dev_err(gtr_dev->dev, "PLL lock time out\n");
>> + ret = -ETIMEDOUT;
>> + break;
>> + }
>> +
>> + udelay(1);
>> + } while (timeout > 0);
>> +
>> + if (ret == 0)
>> + gtr_phy->pll_lock = true;
>> +
>> + dev_info(gtr_dev->dev, "Lane:%d type:%d protocol:%d pll_locked:%s\n",
>> + gtr_phy->lane, gtr_phy->type, gtr_phy->protocol,
>> + gtr_phy->pll_lock ? "yes" : "no");
>> + return ret;
>> +}
>> +EXPORT_SYMBOL_GPL(xpsgtr_wait_pll_lock);
>> +
>> +/**
>> + * xpsgtr_set_txwidth - This function sets the tx bus width of the lane
>> + * @gtr_phy: pointer to lane
>> + * @width: tx bus width size
>> + *
>> + * Return: None
>> + */
>> +static void xpsgtr_set_txwidth(struct xpsgtr_phy *gtr_phy, u32 width)
>> +{
>> + struct xpsgtr_dev *gtr_dev = gtr_phy->data;
>> +
>> + writel(gtr_phy->lane * PROT_BUS_WIDTH_SHIFT >> width,
>> + gtr_dev->serdes + TX_PROT_BUS_WIDTH);
>> +}
>> +
>> +/**
>> + * xpsgtr_set_rxwidth - This function sets the rx bus width of the lane
>> + * @gtr_phy: pointer to lane
>> + * @width: rx bus width size
>> + *
>> + * Return: None
>> + */
>> +static void xpsgtr_set_rxwidth(struct xpsgtr_phy *gtr_phy, u32 width)
>> +{
>> + struct xpsgtr_dev *gtr_dev = gtr_phy->data;
>> +
>> + writel(gtr_phy->lane * PROT_BUS_WIDTH_SHIFT >> width,
>> + gtr_dev->serdes + RX_PROT_BUS_WIDTH);
>> +}
>> +
>> +/**
>> + * xpsgtr_bypass_scramenc - This bypasses scrambler and 8b/10b encoder feature
>> + * @gtr_phy: pointer to lane
>> + *
>> + * Return: None
>> + */
>> +static void xpsgtr_bypass_scramenc(struct xpsgtr_phy *gtr_phy)
>> +{
>> + u32 offset;
>> + struct xpsgtr_dev *gtr_dev = gtr_phy->data;
>> +
>> + /* bypass Scrambler and 8b/10b Encoder */
>> + offset = gtr_phy->lane * L0_TX_DIG_61_OFFSET + L0_TX_DIG_61;
>> + writel(L0_TM_DISABLE_SCRAMBLE_ENCODER, gtr_dev->serdes + offset);
>> +}
>> +
>> +/**
>> + * xpsgtr_bypass_descramdec - bypasses descrambler and 8b/10b encoder feature
>> + * @gtr_phy: pointer to lane
>> + *
>> + * Return: None
>> + */
>> +static void xpsgtr_bypass_descramdec(struct xpsgtr_phy *gtr_phy)
>> +{
>> + u32 offset;
>> + struct xpsgtr_dev *gtr_dev = gtr_phy->data;
>> +
>> + /* bypass Descrambler and 8b/10b decoder */
>> + offset = gtr_phy->lane * L0_TM_DIG_6_OFFSET + L0_TM_DIG_6;
>> + writel(L0_TM_DIS_DESCRAMBLE_DECODER, gtr_dev->serdes + offset);
>> +}
>> +
>> +/**
>> + * xpsgtr_misc_sgmii - miscellaneous settings for SGMII
>> + * @gtr_phy: pointer to lane
>> + *
>> + * Return: None
>> + */
>> +static void xpsgtr_misc_sgmii(struct xpsgtr_phy *gtr_phy)
>> +{
>> + /* Set SGMII protocol tx bus width 10 bits */
>> + xpsgtr_set_txwidth(gtr_phy, PROT_BUS_WIDTH_10);
>> +
>> + /* Set SGMII protocol rx bus width 10 bits */
>> + xpsgtr_set_rxwidth(gtr_phy, PROT_BUS_WIDTH_10);
>> +
>> + /* bypass Descrambler and 8b/10b decoder */
>> + xpsgtr_bypass_descramdec(gtr_phy);
>> +
>> + /* bypass Scrambler and 8b/10b Encoder */
>> + xpsgtr_bypass_scramenc(gtr_phy);
>> +}
>> +
>> +/**
>> + * xpsgtr_misc_sata - miscellaneous settings for SATA
>> + * @gtr_phy: pointer to lane
>> + *
>> + * Return: None
>> + */
>> +static void xpsgtr_misc_sata(struct xpsgtr_phy *gtr_phy)
>> +{
>> + struct xpsgtr_dev *gtr_dev = gtr_phy->data;
>> +
>> + /* bypass Descrambler and 8b/10b decoder */
>> + xpsgtr_bypass_descramdec(gtr_phy);
>> +
>> + /* bypass Scrambler and 8b/10b Encoder */
>> + xpsgtr_bypass_scramenc(gtr_phy);
>> +
>> + writel(gtr_phy->lane, gtr_dev->siou + SATA_CONTROL_OFFSET);
>> +}
>> +
>> +/**
>> + * xpsgtr_phyinit_required - check if phy_init for the lane can be skipped
>> + * @gtr_phy: pointer to the phy lane
>> + *
>> + * Return: true if phy_init can be skipped or false
>> + */
>> +static bool xpsgtr_phyinit_required(struct xpsgtr_phy *gtr_phy)
>> +{
>> + /*
>> + * As USB may save the snapshot of the states during hibernation, doing
>> + * phy_init() will put the USB controller into reset, resulting in the
>> + * losing of the saved snapshot. So try to avoid phy_init() for USB
>> + * except when gtr_phy->skip_phy_init is false (this happens when FPD is
>> + * shutdown during suspend or when gt lane is changed from current one)
>> + */
>> + if (gtr_phy->protocol == ICM_PROTOCOL_USB && gtr_phy->skip_phy_init)
>> + return true;
>> + else
>> + return false;
>> +}
>> +
>> +/**
>> + * xpsgtr_phy_init - initializes a lane
>> + * @phy: pointer to kernel PHY device
>> + *
>> + * Return: 0 on success or error on failure
>> + */
>> +static int xpsgtr_phy_init(struct phy *phy)
>> +{
>> + struct xpsgtr_phy *gtr_phy = phy_get_drvdata(phy);
>> + struct xpsgtr_dev *gtr_dev = gtr_phy->data;
>> + int ret = 0;
>> + u32 offset;
>> + u32 reg;
>> + u32 nsw;
>> + u32 timeout = TIMEOUT_US;
>> +
>> + mutex_lock(&gtr_dev->gtr_mutex);
>> +
>> + /* Check if phy_init() is required */
>> + if (xpsgtr_phyinit_required(gtr_phy))
>> + goto out;
>> +
>> + /* Put controller in reset */
>> + ret = xpsgtr_controller_reset(gtr_phy);
>> + if (ret != 0) {
>> + dev_err(gtr_dev->dev, "Failed to assert reset\n");
>> + goto out;
>> + }
>> +
>> + /*
>> + * There is a functional issue in the GT. The TX termination resistance
>> + * can be out of spec due to a issue in the calibration logic. Below is
>> + * the workaround to fix it. This below is required for XCZU9EG silicon.
>> + */
>> + if (gtr_dev->tx_term_fix) {
>> + /* Enabling Test Mode control for CMN Rest */
>> + reg = readl(gtr_dev->serdes + TM_CMN_RST);
>> + reg = (reg & ~TM_CMN_RST_MASK) | TM_CMN_RST_SET;
>> + writel(reg, gtr_dev->serdes + TM_CMN_RST);
>> +
>> + /* Set Test Mode reset */
>> + reg = readl(gtr_dev->serdes + TM_CMN_RST);
>> + reg = (reg & ~TM_CMN_RST_MASK) | TM_CMN_RST_EN;
>> + writel(reg, gtr_dev->serdes + TM_CMN_RST);
>> +
>> + writel(0x00, gtr_dev->serdes + L3_TM_CALIB_DIG18);
>> + writel(L3_TM_OVERRIDE_NSW_CODE, gtr_dev->serdes +
>> + L3_TM_CALIB_DIG19);
>> +
>> + /* As a part of work around sequence for PMOS calibration fix,
>> + * we need to configure any lane ICM_CFG to valid protocol. This
>> + * will deassert the CMN_Resetn signal.
>> + */
>> + xpsgtr_lane_setprotocol(gtr_phy);
>> +
>> + /* Clear Test Mode reset */
>> + reg = readl(gtr_dev->serdes + TM_CMN_RST);
>> + reg = (reg & ~TM_CMN_RST_MASK) | TM_CMN_RST_SET;
>> + writel(reg, gtr_dev->serdes + TM_CMN_RST);
>> +
>> + dev_dbg(gtr_dev->dev, "calibrating...\n");
>> +
>> + do {
>> + reg = readl(gtr_dev->serdes + L3_CALIB_DONE_STATUS);
>> + if ((reg & L3_CALIB_DONE) == L3_CALIB_DONE)
>> + break;
>> +
>> + if (!--timeout) {
>> + dev_err(gtr_dev->dev, "calibration time out\n");
>> + ret = -ETIMEDOUT;
>> + goto out;
>> + }
>> + udelay(1);
>> + } while (timeout > 0);
>> +
>> + dev_dbg(gtr_dev->dev, "calibration done\n");
>> +
>> + /* Reading NMOS Register Code */
>> + nsw = readl(gtr_dev->serdes + L0_TXPMA_ST_3);
>> +
>> + /* Set Test Mode reset */
>> + reg = readl(gtr_dev->serdes + TM_CMN_RST);
>> + reg = (reg & ~TM_CMN_RST_MASK) | TM_CMN_RST_EN;
>> + writel(reg, gtr_dev->serdes + TM_CMN_RST);
>> +
>> + nsw = nsw & L0_DN_CALIB_CODE;
>> +
>> + /* Writing NMOS register values back [5:3] */
>> + reg = nsw >> L3_NSW_CALIB_SHIFT;
>> + writel(reg, gtr_dev->serdes + L3_TM_CALIB_DIG19);
>> +
>> + /* Writing NMOS register value [2:0] */
>> + reg = ((nsw & L3_TM_CALIB_DIG19_NSW) << L3_NSW_SHIFT) |
>> + (1 << L3_NSW_PIPE_SHIFT);
>> + writel(reg, gtr_dev->serdes + L3_TM_CALIB_DIG18);
>> +
>> + /* Clear Test Mode reset */
>> + reg = readl(gtr_dev->serdes + TM_CMN_RST);
>> + reg = (reg & ~TM_CMN_RST_MASK) | TM_CMN_RST_SET;
>> + writel(reg, gtr_dev->serdes + TM_CMN_RST);
>> +
>> + gtr_dev->tx_term_fix = false;
>> + }
>> +
>> + /* Enable coarse code saturation limiting logic */
>> + offset = gtr_phy->lane * L0_TM_PLL_DIG_37_OFFSET + L0_TM_PLL_DIG_37;
>> + writel(L0_TM_COARSE_CODE_LIMIT, gtr_dev->serdes + offset);
>> +
>> + xpsgtr_configure_pll(gtr_phy);
>> + xpsgtr_lane_setprotocol(gtr_phy);
>> +
>> + if (gtr_phy->protocol == ICM_PROTOCOL_SATA)
>> + xpsgtr_misc_sata(gtr_phy);
>> +
>> + if (gtr_phy->protocol == ICM_PROTOCOL_SGMII)
>> + xpsgtr_misc_sgmii(gtr_phy);
>> +
>> + /* Bring controller out of reset */
>> + ret = xpsgtr_controller_release_reset(gtr_phy);
>> + if (ret != 0) {
>> + dev_err(gtr_dev->dev, "Failed to release reset\n");
>> + goto out;
>> + }
>> +
>> + /* Wait till pll is locked for all protocols except DP. For DP
>> + * pll locking function will be called from driver.
>> + */
>> + if (gtr_phy->protocol != ICM_PROTOCOL_DP) {
>> + ret = xpsgtr_wait_pll_lock(phy);
>> + if (ret != 0)
>> + goto out;
>> + } else {
>> + offset = gtr_phy->lane * L0_TXPMD_TM_45_OFFSET + L0_TXPMD_TM_45;
>> + reg = L0_TXPMD_TM_45_OVER_DP_MAIN |
>> + L0_TXPMD_TM_45_ENABLE_DP_MAIN |
>> + L0_TXPMD_TM_45_OVER_DP_POST1 |
>> + L0_TXPMD_TM_45_OVER_DP_POST2 |
>> + L0_TXPMD_TM_45_ENABLE_DP_POST2;
>> + writel(reg, gtr_dev->serdes + offset);
>> + offset = gtr_phy->lane * L0_TX_ANA_TM_118_OFFSET +
>> + L0_TX_ANA_TM_118;
>> + writel(L0_TX_ANA_TM_118_FORCE_17_0,
>> + gtr_dev->serdes + offset);
>> + }
>> +
>> +out:
>> + mutex_unlock(&gtr_dev->gtr_mutex);
>> + return ret;
>> +}
>> +
>> +/**
>> + * xpsgtr_set_lanetype - derives lane type from dts arguments
>> + * @gtr_phy: pointer to lane
>> + * @controller: type of controller
>> + * @instance_num: instance number of the controller in case multilane controller
>> + *
>> + * Return: 0 on success or error on failure
>> + */
>> +static int xpsgtr_set_lanetype(struct xpsgtr_phy *gtr_phy, u8 controller,
>> + u8 instance_num)
>> +{
>> + switch (controller) {
>> + case PHY_TYPE_SATA:
>> + if (!instance_num)
>> + gtr_phy->type = XPSGTR_TYPE_SATA_0;
>> + else if (instance_num == 1)
>> + gtr_phy->type = XPSGTR_TYPE_SATA_1;
>> + else
>> + return -EINVAL;
>> + break;
>> + case PHY_TYPE_USB3:
>> + if (!instance_num)
>> + gtr_phy->type = XPSGTR_TYPE_USB0;
>> + else if (instance_num == 1)
>> + gtr_phy->type = XPSGTR_TYPE_USB1;
>> + else
>> + return -EINVAL;
>> + break;
>> + case PHY_TYPE_DP:
>> + if (!instance_num)
>> + gtr_phy->type = XPSGTR_TYPE_DP_0;
>> + else if (instance_num == 1)
>> + gtr_phy->type = XPSGTR_TYPE_DP_1;
>> + else
>> + return -EINVAL;
>> + break;
>> + case PHY_TYPE_PCIE:
>> + if (!instance_num)
>> + gtr_phy->type = XPSGTR_TYPE_PCIE_0;
>> + else if (instance_num == 1)
>> + gtr_phy->type = XPSGTR_TYPE_PCIE_1;
>> + else if (instance_num == 2)
>> + gtr_phy->type = XPSGTR_TYPE_PCIE_2;
>> + else if (instance_num == 3)
>> + gtr_phy->type = XPSGTR_TYPE_PCIE_3;
>> + else
>> + return -EINVAL;
>> + break;
>> + case PHY_TYPE_SGMII:
>> + if (!instance_num)
>> + gtr_phy->type = XPSGTR_TYPE_SGMII0;
>> + else if (instance_num == 1)
>> + gtr_phy->type = XPSGTR_TYPE_SGMII1;
>> + else if (instance_num == 2)
>> + gtr_phy->type = XPSGTR_TYPE_SGMII2;
>> + else if (instance_num == 3)
>> + gtr_phy->type = XPSGTR_TYPE_SGMII3;
>> + else
>> + return -EINVAL;
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +/**
>> + * xpsgtr_xlate - provides a PHY specific to a controller
>> + * @dev: pointer to device
>> + * @args: arguments from dts
>> + *
>> + * Return: pointer to kernel PHY device or error on failure
>> + */
>> +static struct phy *xpsgtr_xlate(struct device *dev,
>> + struct of_phandle_args *args)
>> +{
>> + struct xpsgtr_dev *gtr_dev = dev_get_drvdata(dev);
>> + struct xpsgtr_phy *gtr_phy = NULL;
>> + struct device_node *phynode = args->np;
>> + int index;
>> + int i;
>> + u8 controller;
>> + u8 instance_num;
>> +
>> + if (args->args_count != 4) {
>> + dev_err(dev, "Invalid number of cells in 'phy' property\n");
>> + return ERR_PTR(-EINVAL);
>> + }
>> + if (!of_device_is_available(phynode)) {
>> + dev_warn(dev, "requested PHY is disabled\n");
>> + return ERR_PTR(-ENODEV);
>> + }
>> + for (index = 0; index < of_get_child_count(dev->of_node); index++) {
>> + if (phynode == gtr_dev->phys[index]->phy->dev.of_node) {
>> + gtr_phy = gtr_dev->phys[index];
>> + break;
>> + }
>> + }
>> + if (!gtr_phy) {
>> + dev_err(dev, "failed to find appropriate phy\n");
>> + return ERR_PTR(-EINVAL);
>> + }
>> +
>> + /* get type of controller from phys */
>> + controller = args->args[0];
>> +
>> + /* get controller instance number */
>> + instance_num = args->args[1];
>> +
>> + /* Check if lane sharing is required */
>> + gtr_phy->share_laneclk = args->args[2];
>> +
>> + /* get the required clk rate for controller from phys */
>> + gtr_phy->refclk_rate = args->args[3];
>> +
>> + /* derive lane type */
>> + if (xpsgtr_set_lanetype(gtr_phy, controller, instance_num) < 0) {
>> + dev_err(gtr_dev->dev, "Invalid lane type\n");
>> + return ERR_PTR(-EINVAL);
>> + }
>> +
>> + /* configures SSC settings for a lane */
>> + if (xpsgtr_configure_lane(gtr_phy) < 0) {
>> + dev_err(gtr_dev->dev, "Invalid clock rate: %d\n",
>> + gtr_phy->refclk_rate);
>> + return ERR_PTR(-EINVAL);
>> + }
>> +
>> + /*
>> + * Check Interconnect Matrix is obeyed i.e, given lane type
>> + * is allowed to operate on the lane.
>> + */
>> + for (i = 0; i < CONTROLLERS_PER_LANE; i++) {
>> + if (icm_matrix[index][i] == gtr_phy->type)
>> + return gtr_phy->phy;
>> + }
>> +
>> + /* Should not reach here */
>> + return ERR_PTR(-EINVAL);
>> +}
>> +
>> +/**
>> + * xpsgtr_phy_exit - clears previous initialized variables
>> + * @phy: pointer to kernel PHY device
>> + *
>> + * Return: 0 on success or error value on failure
>> + */
>> +static int xpsgtr_phy_exit(struct phy *phy)
>> +{
>> + struct xpsgtr_phy *gtr_phy = phy_get_drvdata(phy);
>> +
>> + if (!gtr_phy)
>> + return -EINVAL;
>> +
>> + /* As we are exiting, clear skip_phy_init flag */
>> + gtr_phy->skip_phy_init = false;
>> +
>> + return 0;
>> +}
>> +
>> +static struct phy_ops xpsgtr_phyops = {
>> + .init = xpsgtr_phy_init,
>> + .exit = xpsgtr_phy_exit,
>> + .owner = THIS_MODULE,
>> +};
>> +
>> +/*
>> + * xpsgtr_get_resets - Gets reset signals based on reset-names property
>> + * @gtr_dev: pointer to structure which stores reset information
>> + *
>> + * Return: 0 on success or error value on failure
>> + */
>> +static int xpsgtr_get_resets(struct xpsgtr_dev *gtr_dev)
>> +{
>> + char *name;
>> + struct reset_control *rst_temp;
>> +
>> + gtr_dev->sata_rst = devm_reset_control_get(gtr_dev->dev, "sata_rst");
>> + if (IS_ERR(gtr_dev->sata_rst)) {
>> + name = "sata_rst";
>> + rst_temp = gtr_dev->sata_rst;
>> + goto error;
>> + }
>> +
>> + gtr_dev->dp_rst = devm_reset_control_get(gtr_dev->dev, "dp_rst");
>> + if (IS_ERR(gtr_dev->dp_rst)) {
>> + name = "dp_rst";
>> + rst_temp = gtr_dev->dp_rst;
>> + goto error;
>> + }
>> +
>> + gtr_dev->usb0_crst = devm_reset_control_get(gtr_dev->dev, "usb0_crst");
>> + if (IS_ERR(gtr_dev->usb0_crst)) {
>> + name = "usb0_crst";
>> + rst_temp = gtr_dev->usb0_crst;
>> + goto error;
>> + }
>> +
>> + gtr_dev->usb1_crst = devm_reset_control_get(gtr_dev->dev, "usb1_crst");
>> + if (IS_ERR(gtr_dev->usb1_crst)) {
>> + name = "usb1_crst";
>> + rst_temp = gtr_dev->usb1_crst;
>> + goto error;
>> + }
>> +
>> + gtr_dev->usb0_hibrst = devm_reset_control_get(gtr_dev->dev,
>> + "usb0_hibrst");
>> + if (IS_ERR(gtr_dev->usb0_hibrst)) {
>> + name = "usb0_hibrst";
>> + rst_temp = gtr_dev->usb0_hibrst;
>> + goto error;
>> + }
>> +
>> + gtr_dev->usb1_hibrst = devm_reset_control_get(gtr_dev->dev,
>> + "usb1_hibrst");
>> + if (IS_ERR(gtr_dev->usb1_hibrst)) {
>> + name = "usb1_hibrst";
>> + rst_temp = gtr_dev->usb1_hibrst;
>> + goto error;
>> + }
>> +
>> + gtr_dev->usb0_apbrst = devm_reset_control_get(gtr_dev->dev,
>> + "usb0_apbrst");
>> + if (IS_ERR(gtr_dev->usb0_apbrst)) {
>> + name = "usb0_apbrst";
>> + rst_temp = gtr_dev->usb0_apbrst;
>> + goto error;
>> + }
>> +
>> + gtr_dev->usb1_apbrst = devm_reset_control_get(gtr_dev->dev,
>> + "usb1_apbrst");
>> + if (IS_ERR(gtr_dev->usb1_apbrst)) {
>> + name = "usb1_apbrst";
>> + rst_temp = gtr_dev->usb1_apbrst;
>> + goto error;
>> + }
>> +
>> + gtr_dev->gem0_rst = devm_reset_control_get(gtr_dev->dev, "gem0_rst");
>> + if (IS_ERR(gtr_dev->gem0_rst)) {
>> + name = "gem0_rst";
>> + rst_temp = gtr_dev->gem0_rst;
>> + goto error;
>> + }
>> +
>> + gtr_dev->gem1_rst = devm_reset_control_get(gtr_dev->dev, "gem1_rst");
>> + if (IS_ERR(gtr_dev->gem1_rst)) {
>> + name = "gem1_rst";
>> + rst_temp = gtr_dev->gem1_rst;
>> + goto error;
>> + }
>> +
>> + gtr_dev->gem2_rst = devm_reset_control_get(gtr_dev->dev, "gem2_rst");
>> + if (IS_ERR(gtr_dev->gem2_rst)) {
>> + name = "gem2_rst";
>> + rst_temp = gtr_dev->gem2_rst;
>> + goto error;
>> + }
>> +
>> + gtr_dev->gem3_rst = devm_reset_control_get(gtr_dev->dev, "gem3_rst");
>> + if (IS_ERR(gtr_dev->gem3_rst)) {
>> + name = "gem3_rst";
>> + rst_temp = gtr_dev->gem3_rst;
>> + goto error;
>> + }
>> +
>> + return 0;
>> +error:
>> + dev_err(gtr_dev->dev, "failed to get %s reset signal\n", name);
>> + return PTR_ERR(rst_temp);
>> +}
>> +
>> +/**
>> + * xpsgtr_probe - The device probe function for driver initialization.
>> + * @pdev: pointer to the platform device structure.
>> + *
>> + * Return: 0 for success and error value on failure
>> + */
>> +static int xpsgtr_probe(struct platform_device *pdev)
>> +{
>> + struct device_node *child, *np = pdev->dev.of_node;
>> + struct xpsgtr_dev *gtr_dev;
>> + struct phy_provider *provider;
>> + struct phy *phy;
>> + struct resource *res;
>> + int lanecount, port = 0, index = 0;
>> + int err;
>> +
>> + gtr_dev = devm_kzalloc(&pdev->dev, sizeof(*gtr_dev), GFP_KERNEL);
>> + if (!gtr_dev)
>> + return -ENOMEM;
>> +
>> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "serdes");
>> + gtr_dev->serdes = devm_ioremap_resource(&pdev->dev, res);
>> + if (IS_ERR(gtr_dev->serdes))
>> + return PTR_ERR(gtr_dev->serdes);
>> +
>> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "siou");
>> + gtr_dev->siou = devm_ioremap_resource(&pdev->dev, res);
>> + if (IS_ERR(gtr_dev->siou))
>> + return PTR_ERR(gtr_dev->siou);
>> +
>> + lanecount = of_get_child_count(np);
>> + if (lanecount > MAX_LANES || lanecount == 0)
>> + return -EINVAL;
>> +
>> + gtr_dev->phys = devm_kzalloc(&pdev->dev, sizeof(phy) * lanecount,
>> + GFP_KERNEL);
>> + if (!gtr_dev->phys)
>> + return -ENOMEM;
>> +
>> + gtr_dev->dev = &pdev->dev;
>> + platform_set_drvdata(pdev, gtr_dev);
>> + mutex_init(&gtr_dev->gtr_mutex);
>> +
>> + if (of_device_is_compatible(np, "xlnx,zynqmp-psgtr"))
>> + gtr_dev->tx_term_fix =
>> + of_property_read_bool(np, "xlnx,tx_termination_fix");
>> +
>> + err = xpsgtr_get_resets(gtr_dev);
>> + if (err) {
>> + dev_err(&pdev->dev, "failed to get resets: %d\n", err);
>> + return err;
>> + }
>> +
>> + for_each_child_of_node(np, child) {
>> + struct xpsgtr_phy *gtr_phy;
>> +
>> + gtr_phy = devm_kzalloc(&pdev->dev, sizeof(*gtr_phy),
>> + GFP_KERNEL);
>> + if (!gtr_phy)
>> + return -ENOMEM;
>> +
>> + /* Assign lane number to gtr_phy instance */
>> + gtr_phy->lane = index;
>> +
>> + /* Disable lane sharing as default */
>> + gtr_phy->share_laneclk = -1;
>> +
>> + gtr_dev->phys[port] = gtr_phy;
>> + phy = devm_phy_create(&pdev->dev, child, &xpsgtr_phyops);
>> + if (IS_ERR(phy)) {
>> + dev_err(&pdev->dev, "failed to create PHY\n");
>> + return PTR_ERR(phy);
>> + }
>> + gtr_dev->phys[port]->phy = phy;
>> + phy_set_drvdata(phy, gtr_dev->phys[port]);
>> + gtr_phy->data = gtr_dev;
>> + port++;
>> + index++;
>> + }
>> + provider = devm_of_phy_provider_register(&pdev->dev, xpsgtr_xlate);
>> + if (IS_ERR(provider)) {
>> + dev_err(&pdev->dev, "registering provider failed\n");
>> + return PTR_ERR(provider);
>> + }
>> + return 0;
>> +}
>> +
>> +#ifdef CONFIG_PM
>> +/**
>> + * xpsgtr_suspend - The function for driver suspend.
>> + * @dev: pointer to the device structure.
>> + *
>> + * Return: 0 for success and error value on failure
>> + */
>> +static int xpsgtr_suspend(struct device *dev)
>> +{
>> + struct xpsgtr_dev *gtr_dev = dev_get_drvdata(dev);
>> +
>> + if (!gtr_dev)
>> + return -EINVAL;
>> +
>> + /* Save the snapshot ICM_CFG registers */
>> + gtr_dev->saved_icm_cfg0 = readl(gtr_dev->serdes + ICM_CFG0);
>> + gtr_dev->saved_icm_cfg1 = readl(gtr_dev->serdes + ICM_CFG1);
>> +
>> + return 0;
>> +}
>> +
>> +/**
>> + * xpsgtr_resume - The function for driver resume.
>> + * @dev: pointer to the device structure.
>> + *
>> + * Return: 0 for success and error value on failure
>> + */
>> +static int xpsgtr_resume(struct device *dev)
>> +{
>> + unsigned int icm_cfg0, icm_cfg1, index;
>> + bool skip_phy_init;
>> + struct xpsgtr_phy *gtr_phy;
>> + struct xpsgtr_dev *gtr_dev = dev_get_drvdata(dev);
>> +
>> + if (!gtr_dev)
>> + return -EINVAL;
>> +
>> + icm_cfg0 = readl(gtr_dev->serdes + ICM_CFG0);
>> + icm_cfg1 = readl(gtr_dev->serdes + ICM_CFG1);
>> +
>> + /* Return if no gt lanes got configured before suspend */
>> + if (!gtr_dev->saved_icm_cfg0 && !gtr_dev->saved_icm_cfg1)
>> + return 0;
>> +
>> + /* Check if the ICM configurations changed after suspend */
>> + if (icm_cfg0 == gtr_dev->saved_icm_cfg0 &&
>> + icm_cfg1 == gtr_dev->saved_icm_cfg1)
>> + skip_phy_init = true;
>> + else
>> + skip_phy_init = false;
>> +
>> + /* This below updates the skip_phy_init for all gtr_phy instances */
>> + for (index = 0; index < of_get_child_count(dev->of_node); index++) {
>> + gtr_phy = gtr_dev->phys[index];
>> + gtr_phy->skip_phy_init = skip_phy_init;
>> + }
>> +
>> + return 0;
>> +}
>> +#endif /* CONFIG_PM */
>> +
>> +/* device PM ops */
>> +static const struct dev_pm_ops xpsgtr_pm_ops = {
>> + SET_SYSTEM_SLEEP_PM_OPS(xpsgtr_suspend, xpsgtr_resume)
>> +};
>> +
>> +/* Match table for of_platform binding */
>> +static const struct of_device_id xpsgtr_of_match[] = {
>> + { .compatible = "xlnx,zynqmp-psgtr", },
>> + { .compatible = "xlnx,zynqmp-psgtr-v1.1", },
>> + {},
>> +};
>> +MODULE_DEVICE_TABLE(of, xpsgtr_of_match);
>> +
>> +static struct platform_driver xpsgtr_driver = {
>> + .probe = xpsgtr_probe,
>> + .driver = {
>> + .name = "xilinx-psgtr",
>> + .of_match_table = xpsgtr_of_match,
>> + .pm = &xpsgtr_pm_ops,
>> + },
>> +};
>> +
>> +module_platform_driver(xpsgtr_driver);
>> +
>> +MODULE_AUTHOR("Xilinx Inc.");
>> +MODULE_LICENSE("GPL v2");
>> +MODULE_DESCRIPTION("Xilinx ZynqMP High speed Gigabit Transceiver");
>> diff --git a/include/dt-bindings/phy/phy.h b/include/dt-bindings/phy/phy.h
>> index d16e875..09cc0a6 100644
>> --- a/include/dt-bindings/phy/phy.h
>> +++ b/include/dt-bindings/phy/phy.h
>> @@ -16,5 +16,7 @@
>> #define PHY_TYPE_USB2 3
>> #define PHY_TYPE_USB3 4
>> #define PHY_TYPE_UFS 5
>> +#define PHY_TYPE_DP 6
>> +#define PHY_TYPE_SGMII 7
>>
>> #endif /* _DT_BINDINGS_PHY */
>> diff --git a/include/linux/phy/phy-zynqmp.h b/include/linux/phy/phy-zynqmp.h
>> new file mode 100644
>> index 0000000..8dfd73f
>> --- /dev/null
>> +++ b/include/linux/phy/phy-zynqmp.h
>> @@ -0,0 +1,52 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/*
>> + * Xilinx ZynqMP PHY header
>> + *
>> + * Copyright (C) 2018 Xilinx, Inc.
>> + *
>> + * Author: Anurag Kumar Vulisha <anuragku@xxxxxxxxxx>
>> + * Author: Hyun Woo Kwon <hyunk@xxxxxxxxxx>
>> + *
>> + */
>> +
>> +#ifndef _PHY_ZYNQMP_H_
>> +#define _PHY_ZYNQMP_H_
>> +
>> +#include <linux/phy/phy.h>
>> +
>> +#if IS_ENABLED(CONFIG_PHY_XILINX_ZYNQMP)
>> +void xpsgtr_override_deemph(struct phy *phy, u8 plvl, u8 vlvl);
>> +void xpsgtr_margining_factor(struct phy *phy, u8 plvl, u8 vlvl);
>> +int xpsgtr_wait_pll_lock(struct phy *phy);
>> +int xpsgtr_usb_crst_assert(struct phy *phy);
>> +int xpsgtr_usb_crst_release(struct phy *phy);
>> +#else
>> +
>> +static inline int xpsgtr_override_deemph(struct phy *base, u8 plvl, u8 vlvl)
>> +{
>> + return -ENODEV;
>> +}
>> +
>> +static inline int xpsgtr_margining_factor(struct phy *base, u8 plvl, u8 vlvl)
>> +{
>> + return -ENODEV;
>> +}
>> +
>> +extern inline int xpsgtr_wait_pll_lock(struct phy *phy)
>> +{
>> + return -ENODEV;
>> +}
>> +
>> +extern inline int xpsgtr_usb_crst_assert(struct phy *phy)
>> +{
>> + return -ENODEV;
>> +}
>> +
>> +extern inline int xpsgtr_usb_crst_release(struct phy *phy)
>> +{
>> + return -ENODEV;
>> +}
>> +
>> +#endif
>> +
>> +#endif /* _PHY_ZYNQMP_H_ */
>> --
>> 2.1.1
>>

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