// SPDX-License-Identifier: GPL-2.0+
/*
* Salvo PHY is a 28nm PHY, it is a legacy PHY, and only
* for USB3 and USB2.
*
* Copyright (c) 2019-2020 NXP
*/
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#define USB3_PHY_OFFSET 0x0
#define USB2_PHY_OFFSET 0x38000
/* USB3 PHY register definition */
#define PHY_PMA_CMN_CTRL1 0xC800
#define TB_ADDR_CMN_DIAG_HSCLK_SEL 0x01e0
#define TB_ADDR_CMN_PLL0_VCOCAL_INIT_TMR 0x0084
#define TB_ADDR_CMN_PLL0_VCOCAL_ITER_TMR 0x0085
#define TB_ADDR_CMN_PLL0_INTDIV 0x0094
#define TB_ADDR_CMN_PLL0_FRACDIV 0x0095
#define TB_ADDR_CMN_PLL0_HIGH_THR 0x0096
#define TB_ADDR_CMN_PLL0_SS_CTRL1 0x0098
#define TB_ADDR_CMN_PLL0_SS_CTRL2 0x0099
#define TB_ADDR_CMN_PLL0_DSM_DIAG 0x0097
#define TB_ADDR_CMN_DIAG_PLL0_OVRD 0x01c2
#define TB_ADDR_CMN_DIAG_PLL0_FBH_OVRD 0x01c0
#define TB_ADDR_CMN_DIAG_PLL0_FBL_OVRD 0x01c1
#define TB_ADDR_CMN_DIAG_PLL0_V2I_TUNE 0x01C5
#define TB_ADDR_CMN_DIAG_PLL0_CP_TUNE 0x01C6
#define TB_ADDR_CMN_DIAG_PLL0_LF_PROG 0x01C7
#define TB_ADDR_CMN_DIAG_PLL0_TEST_MODE 0x01c4
#define TB_ADDR_CMN_PSM_CLK_CTRL 0x0061
#define TB_ADDR_XCVR_DIAG_RX_LANE_CAL_RST_TMR 0x40ea
#define TB_ADDR_XCVR_PSM_RCTRL 0x4001
#define TB_ADDR_TX_PSC_A0 0x4100
#define TB_ADDR_TX_PSC_A1 0x4101
#define TB_ADDR_TX_PSC_A2 0x4102
#define TB_ADDR_TX_PSC_A3 0x4103
#define TB_ADDR_TX_DIAG_ECTRL_OVRD 0x41f5
#define TB_ADDR_TX_PSC_CAL 0x4106
#define TB_ADDR_TX_PSC_RDY 0x4107
#define TB_ADDR_RX_PSC_A0 0x8000
#define TB_ADDR_RX_PSC_A1 0x8001
#define TB_ADDR_RX_PSC_A2 0x8002
#define TB_ADDR_RX_PSC_A3 0x8003
#define TB_ADDR_RX_PSC_CAL 0x8006
#define TB_ADDR_RX_PSC_RDY 0x8007
#define TB_ADDR_TX_TXCC_MGNLS_MULT_000 0x4058
#define TB_ADDR_TX_DIAG_BGREF_PREDRV_DELAY 0x41e7
#define TB_ADDR_RX_SLC_CU_ITER_TMR 0x80e3
#define TB_ADDR_RX_SIGDET_HL_FILT_TMR 0x8090
#define TB_ADDR_RX_SAMP_DAC_CTRL 0x8058
#define TB_ADDR_RX_DIAG_SIGDET_TUNE 0x81dc
#define TB_ADDR_RX_DIAG_LFPSDET_TUNE2 0x81df
#define TB_ADDR_RX_DIAG_BS_TM 0x81f5
#define TB_ADDR_RX_DIAG_DFE_CTRL1 0x81d3
#define TB_ADDR_RX_DIAG_ILL_IQE_TRIM4 0x81c7
#define TB_ADDR_RX_DIAG_ILL_E_TRIM0 0x81c2
#define TB_ADDR_RX_DIAG_ILL_IQ_TRIM0 0x81c1
#define TB_ADDR_RX_DIAG_ILL_IQE_TRIM6 0x81c9
#define TB_ADDR_RX_DIAG_RXFE_TM3 0x81f8
#define TB_ADDR_RX_DIAG_RXFE_TM4 0x81f9
#define TB_ADDR_RX_DIAG_LFPSDET_TUNE 0x81dd
#define TB_ADDR_RX_DIAG_DFE_CTRL3 0x81d5
#define TB_ADDR_RX_DIAG_SC2C_DELAY 0x81e1
#define TB_ADDR_RX_REE_VGA_GAIN_NODFE 0x81bf
#define TB_ADDR_XCVR_PSM_CAL_TMR 0x4002
#define TB_ADDR_XCVR_PSM_A0BYP_TMR 0x4004
#define TB_ADDR_XCVR_PSM_A0IN_TMR 0x4003
#define TB_ADDR_XCVR_PSM_A1IN_TMR 0x4005
#define TB_ADDR_XCVR_PSM_A2IN_TMR 0x4006
#define TB_ADDR_XCVR_PSM_A3IN_TMR 0x4007
#define TB_ADDR_XCVR_PSM_A4IN_TMR 0x4008
#define TB_ADDR_XCVR_PSM_A5IN_TMR 0x4009
#define TB_ADDR_XCVR_PSM_A0OUT_TMR 0x400a
#define TB_ADDR_XCVR_PSM_A1OUT_TMR 0x400b
#define TB_ADDR_XCVR_PSM_A2OUT_TMR 0x400c
#define TB_ADDR_XCVR_PSM_A3OUT_TMR 0x400d
#define TB_ADDR_XCVR_PSM_A4OUT_TMR 0x400e
#define TB_ADDR_XCVR_PSM_A5OUT_TMR 0x400f
#define TB_ADDR_TX_RCVDET_EN_TMR 0x4122
#define TB_ADDR_TX_RCVDET_ST_TMR 0x4123
#define TB_ADDR_XCVR_DIAG_LANE_FCM_EN_MGN_TMR 0x40f2
#define TB_ADDR_TX_RCVDETSC_CTRL 0x4124
/* USB2 PHY register definition */
#define UTMI_REG15 0xaf
#define UTMI_AFE_RX_REG0 0x0d
#define UTMI_AFE_RX_REG5 0x12
#define UTMI_AFE_BC_REG4 0x29
/* Align UTMI_AFE_RX_REG0 bit[7:6] define */
enum usb2_disconn_threshold {
USB2_DISCONN_THRESHOLD_575 = 0x0,
USB2_DISCONN_THRESHOLD_610 = 0x1,
USB2_DISCONN_THRESHOLD_645 = 0x3,
};
#define RX_USB2_DISCONN_MASK GENMASK(7, 6)
/* TB_ADDR_TX_RCVDETSC_CTRL */
#define RXDET_IN_P3_32KHZ BIT(0)
/*
* UTMI_REG15
*
* Gate how many us for the txvalid signal until analog
* HS/FS transmitters have powered up
*/
#define TXVALID_GATE_THRESHOLD_HS_MASK (BIT(4) | BIT(5))
/* 0us, txvalid is ready just after HS/FS transmitters have powered up */
#define TXVALID_GATE_THRESHOLD_HS_0US (BIT(4) | BIT(5))
#define SET_B_SESSION_VALID (BIT(6) | BIT(5))
#define CLR_B_SESSION_VALID (BIT(6))
struct cdns_reg_pairs {
u16 val;
u32 off;
};
struct cdns_salvo_data {
u8 reg_offset_shift;
const struct cdns_reg_pairs *init_sequence_val;
u8 init_sequence_length;
};
struct cdns_salvo_phy {
struct phy *phy;
struct clk *clk;
void __iomem *base;
struct cdns_salvo_data *data;
enum usb2_disconn_threshold usb2_disconn;
};
static const struct of_device_id cdns_salvo_phy_of_match[];
static const struct cdns_salvo_data cdns_nxp_salvo_data;
static bool cdns_is_nxp_phy(struct cdns_salvo_phy *salvo_phy)
{
return salvo_phy->data == &cdns_nxp_salvo_data;
}
static u16 cdns_salvo_read(struct cdns_salvo_phy *salvo_phy, u32 offset, u32 reg)
{
return (u16)readl(salvo_phy->base + offset +
reg * (1 << salvo_phy->data->reg_offset_shift));
}
static void cdns_salvo_write(struct cdns_salvo_phy *salvo_phy, u32 offset,
u32 reg, u16 val)
{
writel(val, salvo_phy->base + offset +
reg * (1 << salvo_phy->data->reg_offset_shift));
}
/*
* Below bringup sequence pair are from Cadence PHY's User Guide
* and NXP platform tuning results.
*/
static const struct cdns_reg_pairs cdns_nxp_sequence_pair[] = {
{0x0830, PHY_PMA_CMN_CTRL1},
{0x0010, TB_ADDR_CMN_DIAG_HSCLK_SEL},
{0x00f0, TB_ADDR_CMN_PLL0_VCOCAL_INIT_TMR},
{0x0018, TB_ADDR_CMN_PLL0_VCOCAL_ITER_TMR},
{0x00d0, TB_ADDR_CMN_PLL0_INTDIV},
{0x4aaa, TB_ADDR_CMN_PLL0_FRACDIV},
{0x0034, TB_ADDR_CMN_PLL0_HIGH_THR},
{0x01ee, TB_ADDR_CMN_PLL0_SS_CTRL1},
{0x7f03, TB_ADDR_CMN_PLL0_SS_CTRL2},
{0x0020, TB_ADDR_CMN_PLL0_DSM_DIAG},
{0x0000, TB_ADDR_CMN_DIAG_PLL0_OVRD},
{0x0000, TB_ADDR_CMN_DIAG_PLL0_FBH_OVRD},
{0x0000, TB_ADDR_CMN_DIAG_PLL0_FBL_OVRD},
{0x0007, TB_ADDR_CMN_DIAG_PLL0_V2I_TUNE},
{0x0027, TB_ADDR_CMN_DIAG_PLL0_CP_TUNE},
{0x0008, TB_ADDR_CMN_DIAG_PLL0_LF_PROG},
{0x0022, TB_ADDR_CMN_DIAG_PLL0_TEST_MODE},
{0x000a, TB_ADDR_CMN_PSM_CLK_CTRL},
{0x0139, TB_ADDR_XCVR_DIAG_RX_LANE_CAL_RST_TMR},
{0xbefc, TB_ADDR_XCVR_PSM_RCTRL},
{0x7799, TB_ADDR_TX_PSC_A0},
{0x7798, TB_ADDR_TX_PSC_A1},
{0x509b, TB_ADDR_TX_PSC_A2},
{0x0003, TB_ADDR_TX_DIAG_ECTRL_OVRD},
{0x509b, TB_ADDR_TX_PSC_A3},
{0x2090, TB_ADDR_TX_PSC_CAL},
{0x2090, TB_ADDR_TX_PSC_RDY},
{0xA6FD, TB_ADDR_RX_PSC_A0},
{0xA6FD, TB_ADDR_RX_PSC_A1},
{0xA410, TB_ADDR_RX_PSC_A2},
{0x2410, TB_ADDR_RX_PSC_A3},
{0x23FF, TB_ADDR_RX_PSC_CAL},
{0x2010, TB_ADDR_RX_PSC_RDY},
{0x0020, TB_ADDR_TX_TXCC_MGNLS_MULT_000},
{0x00ff, TB_ADDR_TX_DIAG_BGREF_PREDRV_DELAY},
{0x0002, TB_ADDR_RX_SLC_CU_ITER_TMR},
{0x0013, TB_ADDR_RX_SIGDET_HL_FILT_TMR},
{0x0000, TB_ADDR_RX_SAMP_DAC_CTRL},
{0x1004, TB_ADDR_RX_DIAG_SIGDET_TUNE},
{0x4041, TB_ADDR_RX_DIAG_LFPSDET_TUNE2},
{0x0480, TB_ADDR_RX_DIAG_BS_TM},
{0x8006, TB_ADDR_RX_DIAG_DFE_CTRL1},
{0x003f, TB_ADDR_RX_DIAG_ILL_IQE_TRIM4},
{0x543f, TB_ADDR_RX_DIAG_ILL_E_TRIM0},
{0x543f, TB_ADDR_RX_DIAG_ILL_IQ_TRIM0},
{0x0000, TB_ADDR_RX_DIAG_ILL_IQE_TRIM6},
{0x8000, TB_ADDR_RX_DIAG_RXFE_TM3},
{0x0003, TB_ADDR_RX_DIAG_RXFE_TM4},
{0x2408, TB_ADDR_RX_DIAG_LFPSDET_TUNE},
{0x05ca, TB_ADDR_RX_DIAG_DFE_CTRL3},
{0x0258, TB_ADDR_RX_DIAG_SC2C_DELAY},
{0x1fff, TB_ADDR_RX_REE_VGA_GAIN_NODFE},
{0x02c6, TB_ADDR_XCVR_PSM_CAL_TMR},
{0x0002, TB_ADDR_XCVR_PSM_A0BYP_TMR},
{0x02c6, TB_ADDR_XCVR_PSM_A0IN_TMR},
{0x0010, TB_ADDR_XCVR_PSM_A1IN_TMR},
{0x0010, TB_ADDR_XCVR_PSM_A2IN_TMR},
{0x0010, TB_ADDR_XCVR_PSM_A3IN_TMR},
{0x0010, TB_ADDR_XCVR_PSM_A4IN_TMR},
{0x0010, TB_ADDR_XCVR_PSM_A5IN_TMR},
{0x0002, TB_ADDR_XCVR_PSM_A0OUT_TMR},
{0x0002, TB_ADDR_XCVR_PSM_A1OUT_TMR},
{0x0002, TB_ADDR_XCVR_PSM_A2OUT_TMR},
{0x0002, TB_ADDR_XCVR_PSM_A3OUT_TMR},
{0x0002, TB_ADDR_XCVR_PSM_A4OUT_TMR},
{0x0002, TB_ADDR_XCVR_PSM_A5OUT_TMR},
/* Change rx detect parameter */
{0x0960, TB_ADDR_TX_RCVDET_EN_TMR},
{0x01e0, TB_ADDR_TX_RCVDET_ST_TMR},
{0x0090, TB_ADDR_XCVR_DIAG_LANE_FCM_EN_MGN_TMR},
};
static int cdns_salvo_phy_init(struct phy *phy)
{
struct cdns_salvo_phy *salvo_phy = phy_get_drvdata(phy);
struct cdns_salvo_data *data = salvo_phy->data;
int ret, i;
u16 value;
ret = clk_prepare_enable(salvo_phy->clk);
if (ret)
return ret;
for (i = 0; i < data->init_sequence_length; i++) {
const struct cdns_reg_pairs *reg_pair = data->init_sequence_val + i;
cdns_salvo_write(salvo_phy, USB3_PHY_OFFSET, reg_pair->off, reg_pair->val);
}
/* RXDET_IN_P3_32KHZ, Receiver detect slow clock enable */
value = cdns_salvo_read(salvo_phy, USB3_PHY_OFFSET, TB_ADDR_TX_RCVDETSC_CTRL);
value |= RXDET_IN_P3_32KHZ;
cdns_salvo_write(salvo_phy, USB3_PHY_OFFSET, TB_ADDR_TX_RCVDETSC_CTRL,
RXDET_IN_P3_32KHZ);
value = cdns_salvo_read(salvo_phy, USB2_PHY_OFFSET, UTMI_REG15);
value &= ~TXVALID_GATE_THRESHOLD_HS_MASK;
cdns_salvo_write(salvo_phy, USB2_PHY_OFFSET, UTMI_REG15,
value | TXVALID_GATE_THRESHOLD_HS_0US);
cdns_salvo_write(salvo_phy, USB2_PHY_OFFSET, UTMI_AFE_RX_REG5, 0x5);
value = cdns_salvo_read(salvo_phy, USB2_PHY_OFFSET, UTMI_AFE_RX_REG0);
value &= ~RX_USB2_DISCONN_MASK;
value = FIELD_PREP(RX_USB2_DISCONN_MASK, salvo_phy->usb2_disconn);
cdns_salvo_write(salvo_phy, USB2_PHY_OFFSET, UTMI_AFE_RX_REG0, value);
udelay(10);
clk_disable_unprepare(salvo_phy->clk);
return ret;
}
static int cdns_salvo_phy_power_on(struct phy *phy)
{
struct cdns_salvo_phy *salvo_phy = phy_get_drvdata(phy);
return clk_prepare_enable(salvo_phy->clk);
}
static int cdns_salvo_phy_power_off(struct phy *phy)
{
struct cdns_salvo_phy *salvo_phy = phy_get_drvdata(phy);
clk_disable_unprepare(salvo_phy->clk);
return 0;
}
static int cdns_salvo_set_mode(struct phy *phy, enum phy_mode mode, int submode)
{
struct cdns_salvo_phy *salvo_phy = phy_get_drvdata(phy);
if (!cdns_is_nxp_phy(salvo_phy))
return 0;
if (mode == PHY_MODE_USB_DEVICE)
cdns_salvo_write(salvo_phy, USB2_PHY_OFFSET, UTMI_AFE_BC_REG4,
SET_B_SESSION_VALID);
else
cdns_salvo_write(salvo_phy, USB2_PHY_OFFSET, UTMI_AFE_BC_REG4,
CLR_B_SESSION_VALID);
return 0;
}
static const struct phy_ops cdns_salvo_phy_ops = {
.init = cdns_salvo_phy_init,
.power_on = cdns_salvo_phy_power_on,
.power_off = cdns_salvo_phy_power_off,
.owner = THIS_MODULE,
.set_mode = cdns_salvo_set_mode,
};
static int cdns_salvo_phy_probe(struct platform_device *pdev)
{
struct phy_provider *phy_provider;
struct device *dev = &pdev->dev;
struct cdns_salvo_phy *salvo_phy;
struct cdns_salvo_data *data;
u32 val;
data = (struct cdns_salvo_data *)of_device_get_match_data(dev);
salvo_phy = devm_kzalloc(dev, sizeof(*salvo_phy), GFP_KERNEL);
if (!salvo_phy)
return -ENOMEM;
salvo_phy->data = data;
salvo_phy->clk = devm_clk_get_optional(dev, "salvo_phy_clk");
if (IS_ERR(salvo_phy->clk))
return PTR_ERR(salvo_phy->clk);
if (of_property_read_u32(dev->of_node, "cdns,usb2-disconnect-threshold-microvolt", &val))
val = 575;
if (val < 610)
salvo_phy->usb2_disconn = USB2_DISCONN_THRESHOLD_575;
else if (val < 645)
salvo_phy->usb2_disconn = USB2_DISCONN_THRESHOLD_610;
else
salvo_phy->usb2_disconn = USB2_DISCONN_THRESHOLD_645;
salvo_phy->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(salvo_phy->base))
return PTR_ERR(salvo_phy->base);
salvo_phy->phy = devm_phy_create(dev, NULL, &cdns_salvo_phy_ops);
if (IS_ERR(salvo_phy->phy))
return PTR_ERR(salvo_phy->phy);
phy_set_drvdata(salvo_phy->phy, salvo_phy);
phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
return PTR_ERR_OR_ZERO(phy_provider);
}
static const struct cdns_salvo_data cdns_nxp_salvo_data = {
2,
cdns_nxp_sequence_pair,
ARRAY_SIZE(cdns_nxp_sequence_pair),
};
static const struct of_device_id cdns_salvo_phy_of_match[] = {
{
.compatible = "nxp,salvo-phy",
.data = &cdns_nxp_salvo_data,
},
{}
};
MODULE_DEVICE_TABLE(of, cdns_salvo_phy_of_match);
static struct platform_driver cdns_salvo_phy_driver = {
.probe = cdns_salvo_phy_probe,
.driver = {
.name = "cdns-salvo-phy",
.of_match_table = cdns_salvo_phy_of_match,
}
};
module_platform_driver(cdns_salvo_phy_driver);
MODULE_AUTHOR("Peter Chen <[email protected]>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Cadence SALVO PHY Driver");
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