// SPDX-License-Identifier: GPL-2.0
/*
* Copyright ( C ) 2018 Marvell
*
* Authors :
* Evan Wang < xswang @ marvell . com >
* Miqu è l Raynal < miquel . raynal @ bootlin . com >
* Pali Roh á r < pali @ kernel . org >
* Marek Beh ú n < kabel @ kernel . org >
*
* Structure inspired from phy - mvebu - cp110 - comphy . c written by Antoine Tenart .
* Comphy code from ARM Trusted Firmware ported by Pali Roh á r < pali @ kernel . org >
* and Marek Beh ú n < kabel @ kernel . org > .
*/
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/phy.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#define PLL_SET_DELAY_US 600
#define COMPHY_PLL_SLEEP 1000
#define COMPHY_PLL_TIMEOUT 150000
/* Comphy lane2 indirect access register offset */
#define COMPHY_LANE2_INDIR_ADDR 0 x0
#define COMPHY_LANE2_INDIR_DATA 0 x4
/* SATA and USB3 PHY offset compared to SATA PHY */
#define COMPHY_LANE2_REGS_BASE 0 x200
/*
* When accessing common PHY lane registers directly , we need to shift by 1 ,
* since the registers are 16 - bit .
*/
#define COMPHY_LANE_REG_DIRECT(reg) (((reg) & 0 x7FF) << 1 )
/* COMPHY registers */
#define COMPHY_POWER_PLL_CTRL 0 x01
#define PU_IVREF_BIT BIT(15 )
#define PU_PLL_BIT BIT(14 )
#define PU_RX_BIT BIT(13 )
#define PU_TX_BIT BIT(12 )
#define PU_TX_INTP_BIT BIT(11 )
#define PU_DFE_BIT BIT(10 )
#define RESET_DTL_RX_BIT BIT(9 )
#define PLL_LOCK_BIT BIT(8 )
#define REF_FREF_SEL_MASK GENMASK(4 , 0 )
#define REF_FREF_SEL_SERDES_25MHZ FIELD_PREP(REF_FREF_SEL_MASK, 0 x1)
#define REF_FREF_SEL_SERDES_40MHZ FIELD_PREP(REF_FREF_SEL_MASK, 0 x3)
#define REF_FREF_SEL_SERDES_50MHZ FIELD_PREP(REF_FREF_SEL_MASK, 0 x4)
#define REF_FREF_SEL_PCIE_USB3_25MHZ FIELD_PREP(REF_FREF_SEL_MASK, 0 x2)
#define REF_FREF_SEL_PCIE_USB3_40MHZ FIELD_PREP(REF_FREF_SEL_MASK, 0 x3)
#define COMPHY_MODE_MASK GENMASK(7 , 5 )
#define COMPHY_MODE_SATA FIELD_PREP(COMPHY_MODE_MASK, 0 x0)
#define COMPHY_MODE_PCIE FIELD_PREP(COMPHY_MODE_MASK, 0 x3)
#define COMPHY_MODE_SERDES FIELD_PREP(COMPHY_MODE_MASK, 0 x4)
#define COMPHY_MODE_USB3 FIELD_PREP(COMPHY_MODE_MASK, 0 x5)
#define COMPHY_KVCO_CAL_CTRL 0 x02
#define USE_MAX_PLL_RATE_BIT BIT(12 )
#define SPEED_PLL_MASK GENMASK(7 , 2 )
#define SPEED_PLL_VALUE_16 FIELD_PREP(SPEED_PLL_MASK, 0 x10)
#define COMPHY_DIG_LOOPBACK_EN 0 x23
#define SEL_DATA_WIDTH_MASK GENMASK(11 , 10 )
#define DATA_WIDTH_10BIT FIELD_PREP(SEL_DATA_WIDTH_MASK, 0 x0)
#define DATA_WIDTH_20BIT FIELD_PREP(SEL_DATA_WIDTH_MASK, 0 x1)
#define DATA_WIDTH_40BIT FIELD_PREP(SEL_DATA_WIDTH_MASK, 0 x2)
#define PLL_READY_TX_BIT BIT(4 )
#define COMPHY_SYNC_PATTERN 0 x24
#define TXD_INVERT_BIT BIT(10 )
#define RXD_INVERT_BIT BIT(11 )
#define COMPHY_SYNC_MASK_GEN 0 x25
#define PHY_GEN_MAX_MASK GENMASK(11 , 10 )
#define PHY_GEN_MAX_USB3_5G FIELD_PREP(PHY_GEN_MAX_MASK, 0 x1)
#define COMPHY_ISOLATION_CTRL 0 x26
#define PHY_ISOLATE_MODE BIT(15 )
#define COMPHY_GEN2_SET2 0 x3e
#define GS2_TX_SSC_AMP_MASK GENMASK(15 , 9 )
#define GS2_TX_SSC_AMP_4128 FIELD_PREP(GS2_TX_SSC_AMP_MASK, 0 x20)
#define GS2_VREG_RXTX_MAS_ISET_MASK GENMASK(8 , 7 )
#define GS2_VREG_RXTX_MAS_ISET_60U FIELD_PREP(GS2_VREG_RXTX_MAS_ISET_MASK,\
0 x0)
#define GS2_VREG_RXTX_MAS_ISET_80U FIELD_PREP(GS2_VREG_RXTX_MAS_ISET_MASK,\
0 x1)
#define GS2_VREG_RXTX_MAS_ISET_100U FIELD_PREP(GS2_VREG_RXTX_MAS_ISET_MASK,\
0 x2)
#define GS2_VREG_RXTX_MAS_ISET_120U FIELD_PREP(GS2_VREG_RXTX_MAS_ISET_MASK,\
0 x3)
#define GS2_RSVD_6_0_MASK GENMASK(6 , 0 )
#define COMPHY_GEN3_SET2 0 x3f
#define COMPHY_IDLE_SYNC_EN 0 x48
#define IDLE_SYNC_EN BIT(12 )
#define COMPHY_MISC_CTRL0 0 x4F
#define CLK100M_125M_EN BIT(4 )
#define TXDCLK_2X_SEL BIT(6 )
#define CLK500M_EN BIT(7 )
#define PHY_REF_CLK_SEL BIT(10 )
#define COMPHY_SFT_RESET 0 x52
#define SFT_RST BIT(9 )
#define SFT_RST_NO_REG BIT(10 )
#define COMPHY_MISC_CTRL1 0 x73
#define SEL_BITS_PCIE_FORCE BIT(15 )
#define COMPHY_GEN2_SET3 0 x112
#define GS3_FFE_CAP_SEL_MASK GENMASK(3 , 0 )
#define GS3_FFE_CAP_SEL_VALUE FIELD_PREP(GS3_FFE_CAP_SEL_MASK, 0 xF)
/* PIPE registers */
#define COMPHY_PIPE_LANE_CFG0 0 x180
#define PRD_TXDEEMPH0_MASK BIT(0 )
#define PRD_TXMARGIN_MASK GENMASK(3 , 1 )
#define PRD_TXSWING_MASK BIT(4 )
#define CFG_TX_ALIGN_POS_MASK GENMASK(8 , 5 )
#define COMPHY_PIPE_LANE_CFG1 0 x181
#define PRD_TXDEEMPH1_MASK BIT(15 )
#define USE_MAX_PLL_RATE_EN BIT(9 )
#define TX_DET_RX_MODE BIT(6 )
#define GEN2_TX_DATA_DLY_MASK GENMASK(4 , 3 )
#define GEN2_TX_DATA_DLY_DEFT FIELD_PREP(GEN2_TX_DATA_DLY_MASK, 2 )
#define TX_ELEC_IDLE_MODE_EN BIT(0 )
#define COMPHY_PIPE_LANE_STAT1 0 x183
#define TXDCLK_PCLK_EN BIT(0 )
#define COMPHY_PIPE_LANE_CFG4 0 x188
#define SPREAD_SPECTRUM_CLK_EN BIT(7 )
#define COMPHY_PIPE_RST_CLK_CTRL 0 x1C1
#define PIPE_SOFT_RESET BIT(0 )
#define PIPE_REG_RESET BIT(1 )
#define MODE_CORE_CLK_FREQ_SEL BIT(9 )
#define MODE_PIPE_WIDTH_32 BIT(3 )
#define MODE_REFDIV_MASK GENMASK(5 , 4 )
#define MODE_REFDIV_BY_4 FIELD_PREP(MODE_REFDIV_MASK, 0 x2)
#define COMPHY_PIPE_TEST_MODE_CTRL 0 x1C2
#define MODE_MARGIN_OVERRIDE BIT(2 )
#define COMPHY_PIPE_CLK_SRC_LO 0 x1C3
#define MODE_CLK_SRC BIT(0 )
#define BUNDLE_PERIOD_SEL BIT(1 )
#define BUNDLE_PERIOD_SCALE_MASK GENMASK(3 , 2 )
#define BUNDLE_SAMPLE_CTRL BIT(4 )
#define PLL_READY_DLY_MASK GENMASK(7 , 5 )
#define CFG_SEL_20B BIT(15 )
#define COMPHY_PIPE_PWR_MGM_TIM1 0 x1D0
#define CFG_PM_OSCCLK_WAIT_MASK GENMASK(15 , 12 )
#define CFG_PM_RXDEN_WAIT_MASK GENMASK(11 , 8 )
#define CFG_PM_RXDEN_WAIT_1_UNIT FIELD_PREP(CFG_PM_RXDEN_WAIT_MASK, 0 x1)
#define CFG_PM_RXDLOZ_WAIT_MASK GENMASK(7 , 0 )
#define CFG_PM_RXDLOZ_WAIT_7_UNIT FIELD_PREP(CFG_PM_RXDLOZ_WAIT_MASK, 0 x7)
#define CFG_PM_RXDLOZ_WAIT_12_UNIT FIELD_PREP(CFG_PM_RXDLOZ_WAIT_MASK, 0 xC)
/*
* This register is not from PHY lane register space . It only exists in the
* indirect register space , before the actual PHY lane 2 registers . So the
* offset is absolute , not relative to COMPHY_LANE2_REGS_BASE .
* It is used only for SATA PHY initialization .
*/
#define COMPHY_RESERVED_REG 0 x0E
#define PHYCTRL_FRM_PIN_BIT BIT(13 )
/* South Bridge PHY Configuration Registers */
#define COMPHY_PHY_REG(lane, reg) (((1 - (lane)) * 0 x28) + ((reg) & 0 x3f))
/*
* lane0 : USB3 / GbE1 PHY Configuration 1
* lane1 : PCIe / GbE0 PHY Configuration 1
* ( used only by SGMII code )
*/
#define COMPHY_PHY_CFG1 0 x0
#define PIN_PU_IVREF_BIT BIT(1 )
#define PIN_RESET_CORE_BIT BIT(11 )
#define PIN_RESET_COMPHY_BIT BIT(12 )
#define PIN_PU_PLL_BIT BIT(16 )
#define PIN_PU_RX_BIT BIT(17 )
#define PIN_PU_TX_BIT BIT(18 )
#define PIN_TX_IDLE_BIT BIT(19 )
#define GEN_RX_SEL_MASK GENMASK(25 , 22 )
#define GEN_RX_SEL_VALUE(val) FIELD_PREP(GEN_RX_SEL_MASK, (val))
#define GEN_TX_SEL_MASK GENMASK(29 , 26 )
#define GEN_TX_SEL_VALUE(val) FIELD_PREP(GEN_TX_SEL_MASK, (val))
#define SERDES_SPEED_1_25_G 0 x6
#define SERDES_SPEED_3_125_G 0 x8
#define PHY_RX_INIT_BIT BIT(30 )
/*
* lane0 : USB3 / GbE1 PHY Status 1
* lane1 : PCIe / GbE0 PHY Status 1
* ( used only by SGMII code )
*/
#define COMPHY_PHY_STAT1 0 x18
#define PHY_RX_INIT_DONE_BIT BIT(0 )
#define PHY_PLL_READY_RX_BIT BIT(2 )
#define PHY_PLL_READY_TX_BIT BIT(3 )
/* PHY Selector */
#define COMPHY_SELECTOR_PHY_REG 0 xFC
/* bit0: 0: Lane1 is GbE0; 1: Lane1 is PCIe */
#define COMPHY_SELECTOR_PCIE_GBE0_SEL_BIT BIT(0 )
/* bit4: 0: Lane0 is GbE1; 1: Lane0 is USB3 */
#define COMPHY_SELECTOR_USB3_GBE1_SEL_BIT BIT(4 )
/* bit8: 0: Lane0 is USB3 instead of GbE1, Lane2 is SATA; 1: Lane2 is USB3 */
#define COMPHY_SELECTOR_USB3_PHY_SEL_BIT BIT(8 )
struct mvebu_a3700_comphy_conf {
unsigned int lane;
enum phy_mode mode;
int submode;
};
#define MVEBU_A3700_COMPHY_CONF(_lane, _mode, _smode) \
{ \
.lane = _lane, \
.mode = _mode, \
.submode = _smode, \
}
#define MVEBU_A3700_COMPHY_CONF_GEN(_lane, _mode) \
MVEBU_A3700_COMPHY_CONF(_lane, _mode, PHY_INTERFACE_MODE_NA)
#define MVEBU_A3700_COMPHY_CONF_ETH(_lane, _smode) \
MVEBU_A3700_COMPHY_CONF(_lane, PHY_MODE_ETHERNET, _smode)
static const struct mvebu_a3700_comphy_conf mvebu_a3700_comphy_modes[] = {
/* lane 0 */
MVEBU_A3700_COMPHY_CONF_GEN(0 , PHY_MODE_USB_HOST_SS),
MVEBU_A3700_COMPHY_CONF_ETH(0 , PHY_INTERFACE_MODE_SGMII),
MVEBU_A3700_COMPHY_CONF_ETH(0 , PHY_INTERFACE_MODE_1000BASEX),
MVEBU_A3700_COMPHY_CONF_ETH(0 , PHY_INTERFACE_MODE_2500BASEX),
/* lane 1 */
MVEBU_A3700_COMPHY_CONF_GEN(1 , PHY_MODE_PCIE),
MVEBU_A3700_COMPHY_CONF_ETH(1 , PHY_INTERFACE_MODE_SGMII),
MVEBU_A3700_COMPHY_CONF_ETH(1 , PHY_INTERFACE_MODE_1000BASEX),
MVEBU_A3700_COMPHY_CONF_ETH(1 , PHY_INTERFACE_MODE_2500BASEX),
/* lane 2 */
MVEBU_A3700_COMPHY_CONF_GEN(2 , PHY_MODE_SATA),
MVEBU_A3700_COMPHY_CONF_GEN(2 , PHY_MODE_USB_HOST_SS),
};
struct mvebu_a3700_comphy_priv {
void __iomem *comphy_regs;
void __iomem *lane0_phy_regs; /* USB3 and GbE1 */
void __iomem *lane1_phy_regs; /* PCIe and GbE0 */
void __iomem *lane2_phy_indirect; /* SATA and USB3 */
spinlock_t lock; /* for PHY selector access */
bool xtal_is_40m;
};
struct mvebu_a3700_comphy_lane {
struct mvebu_a3700_comphy_priv *priv;
struct device *dev;
unsigned int id;
enum phy_mode mode;
int submode;
bool invert_tx;
bool invert_rx;
};
struct gbe_phy_init_data_fix {
u16 addr;
u16 value;
};
/* Changes to 40M1G25 mode data required for running 40M3G125 init mode */
static struct gbe_phy_init_data_fix gbe_phy_init_fix[] = {
{ 0 x005, 0 x07CC }, { 0 x015, 0 x0000 }, { 0 x01B, 0 x0000 },
{ 0 x01D, 0 x0000 }, { 0 x01E, 0 x0000 }, { 0 x01F, 0 x0000 },
{ 0 x020, 0 x0000 }, { 0 x021, 0 x0030 }, { 0 x026, 0 x0888 },
{ 0 x04D, 0 x0152 }, { 0 x04F, 0 xA020 }, { 0 x050, 0 x07CC },
{ 0 x053, 0 xE9CA }, { 0 x055, 0 xBD97 }, { 0 x071, 0 x3015 },
{ 0 x076, 0 x03AA }, { 0 x07C, 0 x0FDF }, { 0 x0C2, 0 x3030 },
{ 0 x0C3, 0 x8000 }, { 0 x0E2, 0 x5550 }, { 0 x0E3, 0 x12A4 },
{ 0 x0E4, 0 x7D00 }, { 0 x0E6, 0 x0C83 }, { 0 x101, 0 xFCC0 },
{ 0 x104, 0 x0C10 }
};
/* 40M1G25 mode init data */
static u16 gbe_phy_init[512 ] = {
/* 0 1 2 3 4 5 6 7 */
/*-----------------------------------------------------------*/
/* 8 9 A B C D E F */
0 x3110, 0 xFD83, 0 x6430, 0 x412F, 0 x82C0, 0 x06FA, 0 x4500, 0 x6D26, /* 00 */
0 xAFC0, 0 x8000, 0 xC000, 0 x0000, 0 x2000, 0 x49CC, 0 x0BC9, 0 x2A52, /* 08 */
0 x0BD2, 0 x0CDE, 0 x13D2, 0 x0CE8, 0 x1149, 0 x10E0, 0 x0000, 0 x0000, /* 10 */
0 x0000, 0 x0000, 0 x0000, 0 x0001, 0 x0000, 0 x4134, 0 x0D2D, 0 xFFFF, /* 18 */
0 xFFE0, 0 x4030, 0 x1016, 0 x0030, 0 x0000, 0 x0800, 0 x0866, 0 x0000, /* 20 */
0 x0000, 0 x0000, 0 xFFFF, 0 xFFFF, 0 xFFFF, 0 xFFFF, 0 xFFFF, 0 xFFFF, /* 28 */
0 xFFFF, 0 xFFFF, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /* 30 */
0 x0000, 0 x0000, 0 x000F, 0 x6A62, 0 x1988, 0 x3100, 0 x3100, 0 x3100, /* 38 */
0 x3100, 0 xA708, 0 x2430, 0 x0830, 0 x1030, 0 x4610, 0 xFF00, 0 xFF00, /* 40 */
0 x0060, 0 x1000, 0 x0400, 0 x0040, 0 x00F0, 0 x0155, 0 x1100, 0 xA02A, /* 48 */
0 x06FA, 0 x0080, 0 xB008, 0 xE3ED, 0 x5002, 0 xB592, 0 x7A80, 0 x0001, /* 50 */
0 x020A, 0 x8820, 0 x6014, 0 x8054, 0 xACAA, 0 xFC88, 0 x2A02, 0 x45CF, /* 58 */
0 x000F, 0 x1817, 0 x2860, 0 x064F, 0 x0000, 0 x0204, 0 x1800, 0 x6000, /* 60 */
0 x810F, 0 x4F23, 0 x4000, 0 x4498, 0 x0850, 0 x0000, 0 x000E, 0 x1002, /* 68 */
0 x9D3A, 0 x3009, 0 xD066, 0 x0491, 0 x0001, 0 x6AB0, 0 x0399, 0 x3780, /* 70 */
0 x0040, 0 x5AC0, 0 x4A80, 0 x0000, 0 x01DF, 0 x0000, 0 x0007, 0 x0000, /* 78 */
0 x2D54, 0 x00A1, 0 x4000, 0 x0100, 0 xA20A, 0 x0000, 0 x0000, 0 x0000, /* 80 */
0 x0000, 0 x0000, 0 x0000, 0 x7400, 0 x0E81, 0 x1000, 0 x1242, 0 x0210, /* 88 */
0 x80DF, 0 x0F1F, 0 x2F3F, 0 x4F5F, 0 x6F7F, 0 x0F1F, 0 x2F3F, 0 x4F5F, /* 90 */
0 x6F7F, 0 x4BAD, 0 x0000, 0 x0000, 0 x0800, 0 x0000, 0 x2400, 0 xB651, /* 98 */
0 xC9E0, 0 x4247, 0 x0A24, 0 x0000, 0 xAF19, 0 x1004, 0 x0000, 0 x0000, /* A0 */
0 x0000, 0 x0013, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /* A8 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /* B0 */
0 x0000, 0 x0000, 0 x0000, 0 x0060, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /* B8 */
0 x0000, 0 x0000, 0 x3010, 0 xFA00, 0 x0000, 0 x0000, 0 x0000, 0 x0003, /* C0 */
0 x1618, 0 x8200, 0 x8000, 0 x0400, 0 x050F, 0 x0000, 0 x0000, 0 x0000, /* C8 */
0 x4C93, 0 x0000, 0 x1000, 0 x1120, 0 x0010, 0 x1242, 0 x1242, 0 x1E00, /* D0 */
0 x0000, 0 x0000, 0 x0000, 0 x00F8, 0 x0000, 0 x0041, 0 x0800, 0 x0000, /* D8 */
0 x82A0, 0 x572E, 0 x2490, 0 x14A9, 0 x4E00, 0 x0000, 0 x0803, 0 x0541, /* E0 */
0 x0C15, 0 x0000, 0 x0000, 0 x0400, 0 x2626, 0 x0000, 0 x0000, 0 x4200, /* E8 */
0 x0000, 0 xAA55, 0 x1020, 0 x0000, 0 x0000, 0 x5010, 0 x0000, 0 x0000, /* F0 */
0 x0000, 0 x0000, 0 x5000, 0 x0000, 0 x0000, 0 x0000, 0 x02F2, 0 x0000, /* F8 */
0 x101F, 0 xFDC0, 0 x4000, 0 x8010, 0 x0110, 0 x0006, 0 x0000, 0 x0000, /*100 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*108 */
0 x04CF, 0 x0000, 0 x04CF, 0 x0000, 0 x04CF, 0 x0000, 0 x04C6, 0 x0000, /*110 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*118 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*120 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*128 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*130 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*138 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*140 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*148 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*150 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*158 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*160 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*168 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*170 */
0 x0000, 0 x0000, 0 x0000, 0 x00F0, 0 x08A2, 0 x3112, 0 x0A14, 0 x0000, /*178 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*180 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*188 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*190 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*198 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*1A0 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*1A8 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*1B0 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*1B8 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*1C0 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*1C8 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*1D0 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*1D8 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*1E0 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*1E8 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, /*1F0 */
0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000, 0 x0000 /*1F8 */
};
static inline void comphy_reg_set(void __iomem *addr, u32 data, u32 mask)
{
u32 val;
val = readl(addr);
val = (val & ~mask) | (data & mask);
writel(val, addr);
}
static inline void comphy_reg_set16(void __iomem *addr, u16 data, u16 mask)
{
u16 val;
val = readw(addr);
val = (val & ~mask) | (data & mask);
writew(val, addr);
}
/* Used for accessing lane 2 registers (SATA/USB3 PHY) */
static void comphy_set_indirect(struct mvebu_a3700_comphy_priv *priv,
u32 offset, u16 data, u16 mask)
{
writel(offset,
priv->lane2_phy_indirect + COMPHY_LANE2_INDIR_ADDR);
comphy_reg_set(priv->lane2_phy_indirect + COMPHY_LANE2_INDIR_DATA,
data, mask);
}
static void comphy_lane_reg_set(struct mvebu_a3700_comphy_lane *lane,
u16 reg, u16 data, u16 mask)
{
if (lane->id == 2 ) {
/* lane 2 PHY registers are accessed indirectly */
comphy_set_indirect(lane->priv,
reg + COMPHY_LANE2_REGS_BASE,
data, mask);
} else {
void __iomem *base = lane->id == 1 ?
lane->priv->lane1_phy_regs :
lane->priv->lane0_phy_regs;
comphy_reg_set16(base + COMPHY_LANE_REG_DIRECT(reg),
data, mask);
}
}
static int comphy_lane_reg_poll(struct mvebu_a3700_comphy_lane *lane,
u16 reg, u16 bits,
ulong sleep_us, ulong timeout_us)
{
int ret;
if (lane->id == 2 ) {
u32 data;
/* lane 2 PHY registers are accessed indirectly */
writel(reg + COMPHY_LANE2_REGS_BASE,
lane->priv->lane2_phy_indirect +
COMPHY_LANE2_INDIR_ADDR);
ret = readl_poll_timeout(lane->priv->lane2_phy_indirect +
COMPHY_LANE2_INDIR_DATA,
data, (data & bits) == bits,
sleep_us, timeout_us);
} else {
void __iomem *base = lane->id == 1 ?
lane->priv->lane1_phy_regs :
lane->priv->lane0_phy_regs;
u16 data;
ret = readw_poll_timeout(base + COMPHY_LANE_REG_DIRECT(reg),
data, (data & bits) == bits,
sleep_us, timeout_us);
}
return ret;
}
static void comphy_periph_reg_set(struct mvebu_a3700_comphy_lane *lane,
u8 reg, u32 data, u32 mask)
{
comphy_reg_set(lane->priv->comphy_regs + COMPHY_PHY_REG(lane->id, reg),
data, mask);
}
static int comphy_periph_reg_poll(struct mvebu_a3700_comphy_lane *lane,
u8 reg, u32 bits,
ulong sleep_us, ulong timeout_us)
{
u32 data;
return readl_poll_timeout(lane->priv->comphy_regs +
COMPHY_PHY_REG(lane->id, reg),
data, (data & bits) == bits,
sleep_us, timeout_us);
}
/* PHY selector configures with corresponding modes */
static int
mvebu_a3700_comphy_set_phy_selector(struct mvebu_a3700_comphy_lane *lane)
{
u32 old, new , clr = 0 , set = 0 ;
unsigned long flags;
switch (lane->mode) {
case PHY_MODE_SATA:
/* SATA must be in Lane2 */
if (lane->id == 2 )
clr = COMPHY_SELECTOR_USB3_PHY_SEL_BIT;
else
goto error;
break ;
case PHY_MODE_ETHERNET:
if (lane->id == 0 )
clr = COMPHY_SELECTOR_USB3_GBE1_SEL_BIT;
else if (lane->id == 1 )
clr = COMPHY_SELECTOR_PCIE_GBE0_SEL_BIT;
else
goto error;
break ;
case PHY_MODE_USB_HOST_SS:
if (lane->id == 2 )
set = COMPHY_SELECTOR_USB3_PHY_SEL_BIT;
else if (lane->id == 0 )
set = COMPHY_SELECTOR_USB3_GBE1_SEL_BIT;
else
goto error;
break ;
case PHY_MODE_PCIE:
/* PCIE must be in Lane1 */
if (lane->id == 1 )
set = COMPHY_SELECTOR_PCIE_GBE0_SEL_BIT;
else
goto error;
break ;
default :
goto error;
}
spin_lock_irqsave(&lane->priv->lock, flags);
old = readl(lane->priv->comphy_regs + COMPHY_SELECTOR_PHY_REG);
new = (old & ~clr) | set;
writel(new , lane->priv->comphy_regs + COMPHY_SELECTOR_PHY_REG);
spin_unlock_irqrestore(&lane->priv->lock, flags);
dev_dbg(lane->dev,
"COMPHY[%d] mode[%d] changed PHY selector 0x%08x -> 0x%08x\n" ,
lane->id, lane->mode, old, new );
return 0 ;
error:
dev_err(lane->dev, "COMPHY[%d] mode[%d] is invalid\n" , lane->id,
lane->mode);
return -EINVAL;
}
static int
mvebu_a3700_comphy_sata_power_on(struct mvebu_a3700_comphy_lane *lane)
{
u32 mask, data, ref_clk;
int ret;
/* Configure phy selector for SATA */
ret = mvebu_a3700_comphy_set_phy_selector(lane);
if (ret)
return ret;
/* Clear phy isolation mode to make it work in normal mode */
comphy_lane_reg_set(lane, COMPHY_ISOLATION_CTRL,
0 x0, PHY_ISOLATE_MODE);
/* 0. Check the Polarity invert bits */
data = 0 x0;
if (lane->invert_tx)
data |= TXD_INVERT_BIT;
if (lane->invert_rx)
data |= RXD_INVERT_BIT;
mask = TXD_INVERT_BIT | RXD_INVERT_BIT;
comphy_lane_reg_set(lane, COMPHY_SYNC_PATTERN, data, mask);
/* 1. Select 40-bit data width */
comphy_lane_reg_set(lane, COMPHY_DIG_LOOPBACK_EN,
DATA_WIDTH_40BIT, SEL_DATA_WIDTH_MASK);
/* 2. Select reference clock(25M) and PHY mode (SATA) */
if (lane->priv->xtal_is_40m)
ref_clk = REF_FREF_SEL_SERDES_40MHZ;
else
ref_clk = REF_FREF_SEL_SERDES_25MHZ;
data = ref_clk | COMPHY_MODE_SATA;
mask = REF_FREF_SEL_MASK | COMPHY_MODE_MASK;
comphy_lane_reg_set(lane, COMPHY_POWER_PLL_CTRL, data, mask);
/* 3. Use maximum PLL rate (no power save) */
comphy_lane_reg_set(lane, COMPHY_KVCO_CAL_CTRL,
USE_MAX_PLL_RATE_BIT, USE_MAX_PLL_RATE_BIT);
/* 4. Reset reserved bit */
comphy_set_indirect(lane->priv, COMPHY_RESERVED_REG,
0 x0, PHYCTRL_FRM_PIN_BIT);
/* 5. Set vendor-specific configuration (It is done in sata driver) */
/* XXX: in U-Boot below sequence was executed in this place, in Linux
* not . Now it is done only in U - Boot before this comphy
* initialization - tests shows that it works ok , but in case of any
* future problem it is left for reference .
* reg_set ( MVEBU_REGS_BASE + 0 xe00a0 , 0 , 0 xffffffff ) ;
* reg_set ( MVEBU_REGS_BASE + 0 xe00a4 , BIT ( 6 ) , BIT ( 6 ) ) ;
*/
/* Wait for > 55 us to allow PLL be enabled */
udelay(PLL_SET_DELAY_US);
/* Polling status */
ret = comphy_lane_reg_poll(lane, COMPHY_DIG_LOOPBACK_EN,
PLL_READY_TX_BIT, COMPHY_PLL_SLEEP,
COMPHY_PLL_TIMEOUT);
if (ret)
dev_err(lane->dev, "Failed to lock SATA PLL\n" );
return ret;
}
static void comphy_gbe_phy_init(struct mvebu_a3700_comphy_lane *lane,
bool is_1gbps)
{
int addr, fix_idx;
u16 val;
fix_idx = 0 ;
for (addr = 0 ; addr < ARRAY_SIZE(gbe_phy_init); addr++) {
/*
* All PHY register values are defined in full for 3 . 125 Gbps
* SERDES speed . The values required for 1 . 25 Gbps are almost
* the same and only few registers should be " fixed " in
* comparison to 3 . 125 Gbps values . These register values are
* stored in " gbe_phy_init_fix " array .
*/
if (!is_1gbps &&
fix_idx < ARRAY_SIZE(gbe_phy_init_fix) &&
gbe_phy_init_fix[fix_idx].addr == addr) {
/* Use new value */
val = gbe_phy_init_fix[fix_idx].value;
fix_idx++;
} else {
val = gbe_phy_init[addr];
}
comphy_lane_reg_set(lane, addr, val, 0 xFFFF);
}
}
static int
mvebu_a3700_comphy_ethernet_power_on(struct mvebu_a3700_comphy_lane *lane)
{
u32 mask, data, speed_sel;
int ret;
/* Set selector */
ret = mvebu_a3700_comphy_set_phy_selector(lane);
if (ret)
return ret;
/*
* 1 . Reset PHY by setting PHY input port PIN_RESET = 1 .
* 2 . Set PHY input port PIN_TX_IDLE = 1 , PIN_PU_IVREF = 1 to keep
* PHY TXP / TXN output to idle state during PHY initialization
* 3 . Set PHY input port PIN_PU_PLL = 0 , PIN_PU_RX = 0 , PIN_PU_TX = 0 .
*/
data = PIN_PU_IVREF_BIT | PIN_TX_IDLE_BIT | PIN_RESET_COMPHY_BIT;
mask = data | PIN_RESET_CORE_BIT | PIN_PU_PLL_BIT | PIN_PU_RX_BIT |
PIN_PU_TX_BIT | PHY_RX_INIT_BIT;
comphy_periph_reg_set(lane, COMPHY_PHY_CFG1, data, mask);
/* 4. Release reset to the PHY by setting PIN_RESET=0. */
data = 0 x0;
mask = PIN_RESET_COMPHY_BIT;
comphy_periph_reg_set(lane, COMPHY_PHY_CFG1, data, mask);
/*
* 5 . Set PIN_PHY_GEN_TX [ 3 : 0 ] and PIN_PHY_GEN_RX [ 3 : 0 ] to decide COMPHY
* bit rate
*/
switch (lane->submode) {
case PHY_INTERFACE_MODE_SGMII:
case PHY_INTERFACE_MODE_1000BASEX:
/* SGMII 1G, SerDes speed 1.25G */
speed_sel = SERDES_SPEED_1_25_G;
break ;
case PHY_INTERFACE_MODE_2500BASEX:
/* 2500Base-X, SerDes speed 3.125G */
speed_sel = SERDES_SPEED_3_125_G;
break ;
default :
/* Other rates are not supported */
dev_err(lane->dev,
"unsupported phy speed %d on comphy lane%d\n" ,
lane->submode, lane->id);
return -EINVAL;
}
data = GEN_RX_SEL_VALUE(speed_sel) | GEN_TX_SEL_VALUE(speed_sel);
mask = GEN_RX_SEL_MASK | GEN_TX_SEL_MASK;
comphy_periph_reg_set(lane, COMPHY_PHY_CFG1, data, mask);
/*
* 6 . Wait 10 mS for bandgap and reference clocks to stabilize ; then
* start SW programming .
*/
mdelay(10 );
/* 7. Program COMPHY register PHY_MODE */
data = COMPHY_MODE_SERDES;
mask = COMPHY_MODE_MASK;
comphy_lane_reg_set(lane, COMPHY_POWER_PLL_CTRL, data, mask);
/*
* 8 . Set COMPHY register REFCLK_SEL to select the correct REFCLK
* source
*/
data = 0 x0;
mask = PHY_REF_CLK_SEL;
comphy_lane_reg_set(lane, COMPHY_MISC_CTRL0, data, mask);
/*
* 9 . Set correct reference clock frequency in COMPHY register
* REF_FREF_SEL .
*/
if (lane->priv->xtal_is_40m)
data = REF_FREF_SEL_SERDES_50MHZ;
else
data = REF_FREF_SEL_SERDES_25MHZ;
mask = REF_FREF_SEL_MASK;
comphy_lane_reg_set(lane, COMPHY_POWER_PLL_CTRL, data, mask);
/*
* 10 . Program COMPHY register PHY_GEN_MAX [ 1 : 0 ]
* This step is mentioned in the flow received from verification team .
* However the PHY_GEN_MAX value is only meaningful for other interfaces
* ( not SERDES ) . For instance , it selects SATA speed 1 . 5 / 3 / 6 Gbps or
* PCIe speed 2 . 5 / 5 Gbps
*/
/*
* 11 . Program COMPHY register SEL_BITS to set correct parallel data
* bus width
*/
data = DATA_WIDTH_10BIT;
mask = SEL_DATA_WIDTH_MASK;
comphy_lane_reg_set(lane, COMPHY_DIG_LOOPBACK_EN, data, mask);
/*
* 12 . As long as DFE function needs to be enabled in any mode ,
* COMPHY register DFE_UPDATE_EN [ 5 : 0 ] shall be programmed to 0 x3F
* for real chip during COMPHY power on .
* The value of the DFE_UPDATE_EN already is 0 x3F , because it is the
* default value after reset of the PHY .
*/
/*
* 13 . Program COMPHY GEN registers .
* These registers should be programmed based on the lab testing result
* to achieve optimal performance . Please contact the CEA group to get
* the related GEN table during real chip bring - up . We only required to
* run though the entire registers programming flow defined by
* " comphy_gbe_phy_init " when the REF clock is 40 MHz . For REF clock
* 25 MHz the default values stored in PHY registers are OK .
*/
dev_dbg(lane->dev, "Running C-DPI phy init %s mode\n" ,
lane->submode == PHY_INTERFACE_MODE_2500BASEX ? "2G5" : "1G" );
if (lane->priv->xtal_is_40m)
comphy_gbe_phy_init(lane,
lane->submode != PHY_INTERFACE_MODE_2500BASEX);
/*
* 14 . Check the PHY Polarity invert bit
*/
data = 0 x0;
if (lane->invert_tx)
data |= TXD_INVERT_BIT;
if (lane->invert_rx)
data |= RXD_INVERT_BIT;
mask = TXD_INVERT_BIT | RXD_INVERT_BIT;
comphy_lane_reg_set(lane, COMPHY_SYNC_PATTERN, data, mask);
/*
* 15 . Set PHY input ports PIN_PU_PLL , PIN_PU_TX and PIN_PU_RX to 1 to
* start PHY power up sequence . All the PHY register programming should
* be done before PIN_PU_PLL = 1 . There should be no register programming
* for normal PHY operation from this point .
*/
data = PIN_PU_PLL_BIT | PIN_PU_RX_BIT | PIN_PU_TX_BIT;
mask = data;
comphy_periph_reg_set(lane, COMPHY_PHY_CFG1, data, mask);
/*
* 16 . Wait for PHY power up sequence to finish by checking output ports
* PIN_PLL_READY_TX = 1 and PIN_PLL_READY_RX = 1 .
*/
ret = comphy_periph_reg_poll(lane, COMPHY_PHY_STAT1,
PHY_PLL_READY_TX_BIT |
PHY_PLL_READY_RX_BIT,
COMPHY_PLL_SLEEP, COMPHY_PLL_TIMEOUT);
if (ret) {
dev_err(lane->dev, "Failed to lock PLL for SERDES PHY %d\n" ,
lane->id);
return ret;
}
/*
* 17 . Set COMPHY input port PIN_TX_IDLE = 0
*/
comphy_periph_reg_set(lane, COMPHY_PHY_CFG1, 0 x0, PIN_TX_IDLE_BIT);
/*
* 18 . After valid data appear on PIN_RXDATA bus , set PIN_RX_INIT = 1 . To
* start RX initialization . PIN_RX_INIT_DONE will be cleared to 0 by the
* PHY After RX initialization is done , PIN_RX_INIT_DONE will be set to
* 1 by COMPHY Set PIN_RX_INIT = 0 after PIN_RX_INIT_DONE = 1 . Please
* refer to RX initialization part for details .
*/
comphy_periph_reg_set(lane, COMPHY_PHY_CFG1,
PHY_RX_INIT_BIT, PHY_RX_INIT_BIT);
ret = comphy_periph_reg_poll(lane, COMPHY_PHY_STAT1,
PHY_PLL_READY_TX_BIT |
PHY_PLL_READY_RX_BIT,
COMPHY_PLL_SLEEP, COMPHY_PLL_TIMEOUT);
if (ret) {
dev_err(lane->dev, "Failed to lock PLL for SERDES PHY %d\n" ,
lane->id);
return ret;
}
ret = comphy_periph_reg_poll(lane, COMPHY_PHY_STAT1,
PHY_RX_INIT_DONE_BIT,
COMPHY_PLL_SLEEP, COMPHY_PLL_TIMEOUT);
if (ret)
dev_err(lane->dev, "Failed to init RX of SERDES PHY %d\n" ,
lane->id);
return ret;
}
static int
mvebu_a3700_comphy_usb3_power_on(struct mvebu_a3700_comphy_lane *lane)
{
u32 mask, data, cfg, ref_clk;
int ret;
/* Set phy seclector */
ret = mvebu_a3700_comphy_set_phy_selector(lane);
if (ret)
return ret;
/* COMPHY register reset (cleared automatically) */
comphy_lane_reg_set(lane, COMPHY_SFT_RESET, SFT_RST, SFT_RST);
/*
* 0 . Set PHY OTG Control ( 0 x5d034 ) , bit 4 , Power up OTG module The
* register belong to UTMI module , so it is set in UTMI phy driver .
*/
/*
* 1 . Set PRD_TXDEEMPH ( 3 . 5 db de - emph )
*/
data = PRD_TXDEEMPH0_MASK;
mask = PRD_TXDEEMPH0_MASK | PRD_TXMARGIN_MASK | PRD_TXSWING_MASK |
CFG_TX_ALIGN_POS_MASK;
comphy_lane_reg_set(lane, COMPHY_PIPE_LANE_CFG0, data, mask);
/*
* 2 . Set BIT0 : enable transmitter in high impedance mode
* Set BIT [ 3 : 4 ] : delay 2 clock cycles for HiZ off latency
* Set BIT6 : Tx detect Rx at HiZ mode
* Unset BIT15 : set to 0 to set USB3 De - emphasize level to - 3 . 5 db
* together with bit 0 of COMPHY_PIPE_LANE_CFG0 register
*/
data = TX_DET_RX_MODE | GEN2_TX_DATA_DLY_DEFT | TX_ELEC_IDLE_MODE_EN;
mask = PRD_TXDEEMPH1_MASK | TX_DET_RX_MODE | GEN2_TX_DATA_DLY_MASK |
TX_ELEC_IDLE_MODE_EN;
comphy_lane_reg_set(lane, COMPHY_PIPE_LANE_CFG1, data, mask);
/*
* 3 . Set Spread Spectrum Clock Enabled
*/
comphy_lane_reg_set(lane, COMPHY_PIPE_LANE_CFG4,
SPREAD_SPECTRUM_CLK_EN, SPREAD_SPECTRUM_CLK_EN);
/*
* 4 . Set Override Margining Controls From the MAC :
* Use margining signals from lane configuration
*/
comphy_lane_reg_set(lane, COMPHY_PIPE_TEST_MODE_CTRL,
MODE_MARGIN_OVERRIDE, 0 xFFFF);
/*
* 5 . Set Lane - to - Lane Bundle Clock Sampling Period = per PCLK cycles
* set Mode Clock Source = PCLK is generated from REFCLK
*/
data = 0 x0;
mask = MODE_CLK_SRC | BUNDLE_PERIOD_SEL | BUNDLE_PERIOD_SCALE_MASK |
BUNDLE_SAMPLE_CTRL | PLL_READY_DLY_MASK;
comphy_lane_reg_set(lane, COMPHY_PIPE_CLK_SRC_LO, data, mask);
/*
* 6 . Set G2 Spread Spectrum Clock Amplitude at 4 K
*/
comphy_lane_reg_set(lane, COMPHY_GEN2_SET2,
GS2_TX_SSC_AMP_4128, GS2_TX_SSC_AMP_MASK);
/*
* 7 . Unset G3 Spread Spectrum Clock Amplitude
* set G3 TX and RX Register Master Current Select
*/
data = GS2_VREG_RXTX_MAS_ISET_60U;
mask = GS2_TX_SSC_AMP_MASK | GS2_VREG_RXTX_MAS_ISET_MASK |
GS2_RSVD_6_0_MASK;
comphy_lane_reg_set(lane, COMPHY_GEN3_SET2, data, mask);
/*
* 8 . Check crystal jumper setting and program the Power and PLL Control
* accordingly Change RX wait
*/
if (lane->priv->xtal_is_40m) {
ref_clk = REF_FREF_SEL_PCIE_USB3_40MHZ;
cfg = CFG_PM_RXDLOZ_WAIT_12_UNIT;
} else {
ref_clk = REF_FREF_SEL_PCIE_USB3_25MHZ;
cfg = CFG_PM_RXDLOZ_WAIT_7_UNIT;
}
data = PU_IVREF_BIT | PU_PLL_BIT | PU_RX_BIT | PU_TX_BIT |
PU_TX_INTP_BIT | PU_DFE_BIT | COMPHY_MODE_USB3 | ref_clk;
mask = PU_IVREF_BIT | PU_PLL_BIT | PU_RX_BIT | PU_TX_BIT |
PU_TX_INTP_BIT | PU_DFE_BIT | PLL_LOCK_BIT | COMPHY_MODE_MASK |
REF_FREF_SEL_MASK;
comphy_lane_reg_set(lane, COMPHY_POWER_PLL_CTRL, data, mask);
data = CFG_PM_RXDEN_WAIT_1_UNIT | cfg;
mask = CFG_PM_OSCCLK_WAIT_MASK | CFG_PM_RXDEN_WAIT_MASK |
CFG_PM_RXDLOZ_WAIT_MASK;
comphy_lane_reg_set(lane, COMPHY_PIPE_PWR_MGM_TIM1, data, mask);
/*
* 9 . Enable idle sync
*/
comphy_lane_reg_set(lane, COMPHY_IDLE_SYNC_EN,
IDLE_SYNC_EN, IDLE_SYNC_EN);
/*
* 10 . Enable the output of 500 M clock
*/
comphy_lane_reg_set(lane, COMPHY_MISC_CTRL0, CLK500M_EN, CLK500M_EN);
/*
* 11 . Set 20 - bit data width
*/
comphy_lane_reg_set(lane, COMPHY_DIG_LOOPBACK_EN,
DATA_WIDTH_20BIT, 0 xFFFF);
/*
* 12 . Override Speed_PLL value and use MAC PLL
*/
data = SPEED_PLL_VALUE_16 | USE_MAX_PLL_RATE_BIT;
mask = 0 xFFFF;
comphy_lane_reg_set(lane, COMPHY_KVCO_CAL_CTRL, data, mask);
/*
* 13 . Check the Polarity invert bit
*/
data = 0 x0;
if (lane->invert_tx)
data |= TXD_INVERT_BIT;
if (lane->invert_rx)
data |= RXD_INVERT_BIT;
mask = TXD_INVERT_BIT | RXD_INVERT_BIT;
comphy_lane_reg_set(lane, COMPHY_SYNC_PATTERN, data, mask);
/*
* 14 . Set max speed generation to USB3 . 0 5 Gbps
*/
comphy_lane_reg_set(lane, COMPHY_SYNC_MASK_GEN,
PHY_GEN_MAX_USB3_5G, PHY_GEN_MAX_MASK);
/*
* 15 . Set capacitor value for FFE gain peaking to 0 xF
*/
comphy_lane_reg_set(lane, COMPHY_GEN2_SET3,
GS3_FFE_CAP_SEL_VALUE, GS3_FFE_CAP_SEL_MASK);
/*
* 16 . Release SW reset
*/
data = MODE_CORE_CLK_FREQ_SEL | MODE_PIPE_WIDTH_32 | MODE_REFDIV_BY_4;
mask = 0 xFFFF;
comphy_lane_reg_set(lane, COMPHY_PIPE_RST_CLK_CTRL, data, mask);
/* Wait for > 55 us to allow PCLK be enabled */
udelay(PLL_SET_DELAY_US);
ret = comphy_lane_reg_poll(lane, COMPHY_PIPE_LANE_STAT1, TXDCLK_PCLK_EN,
COMPHY_PLL_SLEEP, COMPHY_PLL_TIMEOUT);
if (ret)
dev_err(lane->dev, "Failed to lock USB3 PLL\n" );
return ret;
}
static int
mvebu_a3700_comphy_pcie_power_on(struct mvebu_a3700_comphy_lane *lane)
{
u32 mask, data, ref_clk;
int ret;
/* Configure phy selector for PCIe */
ret = mvebu_a3700_comphy_set_phy_selector(lane);
if (ret)
return ret;
/* 1. Enable max PLL. */
comphy_lane_reg_set(lane, COMPHY_PIPE_LANE_CFG1,
USE_MAX_PLL_RATE_EN, USE_MAX_PLL_RATE_EN);
/* 2. Select 20 bit SERDES interface. */
comphy_lane_reg_set(lane, COMPHY_PIPE_CLK_SRC_LO,
CFG_SEL_20B, CFG_SEL_20B);
/* 3. Force to use reg setting for PCIe mode */
comphy_lane_reg_set(lane, COMPHY_MISC_CTRL1,
SEL_BITS_PCIE_FORCE, SEL_BITS_PCIE_FORCE);
/* 4. Change RX wait */
data = CFG_PM_RXDEN_WAIT_1_UNIT | CFG_PM_RXDLOZ_WAIT_12_UNIT;
mask = CFG_PM_OSCCLK_WAIT_MASK | CFG_PM_RXDEN_WAIT_MASK |
CFG_PM_RXDLOZ_WAIT_MASK;
comphy_lane_reg_set(lane, COMPHY_PIPE_PWR_MGM_TIM1, data, mask);
/* 5. Enable idle sync */
comphy_lane_reg_set(lane, COMPHY_IDLE_SYNC_EN,
IDLE_SYNC_EN, IDLE_SYNC_EN);
/* 6. Enable the output of 100M/125M/500M clock */
data = CLK500M_EN | TXDCLK_2X_SEL | CLK100M_125M_EN;
mask = data;
comphy_lane_reg_set(lane, COMPHY_MISC_CTRL0, data, mask);
/*
* 7 . Enable TX , PCIE global register , 0 xd0074814 , it is done in
* PCI - E driver
*/
/*
* 8 . Check crystal jumper setting and program the Power and PLL
* Control accordingly
*/
if (lane->priv->xtal_is_40m)
ref_clk = REF_FREF_SEL_PCIE_USB3_40MHZ;
else
ref_clk = REF_FREF_SEL_PCIE_USB3_25MHZ;
data = PU_IVREF_BIT | PU_PLL_BIT | PU_RX_BIT | PU_TX_BIT |
PU_TX_INTP_BIT | PU_DFE_BIT | COMPHY_MODE_PCIE | ref_clk;
mask = 0 xFFFF;
comphy_lane_reg_set(lane, COMPHY_POWER_PLL_CTRL, data, mask);
/* 9. Override Speed_PLL value and use MAC PLL */
comphy_lane_reg_set(lane, COMPHY_KVCO_CAL_CTRL,
SPEED_PLL_VALUE_16 | USE_MAX_PLL_RATE_BIT,
0 xFFFF);
/* 10. Check the Polarity invert bit */
data = 0 x0;
if (lane->invert_tx)
data |= TXD_INVERT_BIT;
if (lane->invert_rx)
data |= RXD_INVERT_BIT;
mask = TXD_INVERT_BIT | RXD_INVERT_BIT;
comphy_lane_reg_set(lane, COMPHY_SYNC_PATTERN, data, mask);
/* 11. Release SW reset */
data = MODE_CORE_CLK_FREQ_SEL | MODE_PIPE_WIDTH_32;
mask = data | PIPE_SOFT_RESET | MODE_REFDIV_MASK;
comphy_lane_reg_set(lane, COMPHY_PIPE_RST_CLK_CTRL, data, mask);
/* Wait for > 55 us to allow PCLK be enabled */
udelay(PLL_SET_DELAY_US);
ret = comphy_lane_reg_poll(lane, COMPHY_PIPE_LANE_STAT1, TXDCLK_PCLK_EN,
COMPHY_PLL_SLEEP, COMPHY_PLL_TIMEOUT);
if (ret)
dev_err(lane->dev, "Failed to lock PCIE PLL\n" );
return ret;
}
static void
mvebu_a3700_comphy_sata_power_off(struct mvebu_a3700_comphy_lane *lane)
{
/* Set phy isolation mode */
comphy_lane_reg_set(lane, COMPHY_ISOLATION_CTRL,
PHY_ISOLATE_MODE, PHY_ISOLATE_MODE);
/* Power off PLL, Tx, Rx */
comphy_lane_reg_set(lane, COMPHY_POWER_PLL_CTRL,
0 x0, PU_PLL_BIT | PU_RX_BIT | PU_TX_BIT);
}
static void
mvebu_a3700_comphy_ethernet_power_off(struct mvebu_a3700_comphy_lane *lane)
{
u32 mask, data;
data = PIN_RESET_CORE_BIT | PIN_RESET_COMPHY_BIT | PIN_PU_IVREF_BIT |
PHY_RX_INIT_BIT;
mask = data;
comphy_periph_reg_set(lane, COMPHY_PHY_CFG1, data, mask);
}
static void
mvebu_a3700_comphy_pcie_power_off(struct mvebu_a3700_comphy_lane *lane)
{
/* Power off PLL, Tx, Rx */
comphy_lane_reg_set(lane, COMPHY_POWER_PLL_CTRL,
0 x0, PU_PLL_BIT | PU_RX_BIT | PU_TX_BIT);
}
static void mvebu_a3700_comphy_usb3_power_off(struct mvebu_a3700_comphy_lane *lane)
{
/*
* The USB3 MAC sets the USB3 PHY to low state , so we do not
* need to power off USB3 PHY again .
*/
}
static bool mvebu_a3700_comphy_check_mode(int lane,
enum phy_mode mode,
int submode)
{
int i, n = ARRAY_SIZE(mvebu_a3700_comphy_modes);
/* Unused PHY mux value is 0x0 */
if (mode == PHY_MODE_INVALID)
return false ;
for (i = 0 ; i < n; i++) {
if (mvebu_a3700_comphy_modes[i].lane == lane &&
mvebu_a3700_comphy_modes[i].mode == mode &&
mvebu_a3700_comphy_modes[i].submode == submode)
break ;
}
if (i == n)
return false ;
return true ;
}
static int mvebu_a3700_comphy_set_mode(struct phy *phy, enum phy_mode mode,
int submode)
{
struct mvebu_a3700_comphy_lane *lane = phy_get_drvdata(phy);
if (!mvebu_a3700_comphy_check_mode(lane->id, mode, submode)) {
dev_err(lane->dev, "invalid COMPHY mode\n" );
return -EINVAL;
}
/* Mode cannot be changed while the PHY is powered on */
if (phy->power_count &&
(lane->mode != mode || lane->submode != submode))
return -EBUSY;
/* Just remember the mode, ->power_on() will do the real setup */
lane->mode = mode;
lane->submode = submode;
return 0 ;
}
static int mvebu_a3700_comphy_power_on(struct phy *phy)
{
struct mvebu_a3700_comphy_lane *lane = phy_get_drvdata(phy);
if (!mvebu_a3700_comphy_check_mode(lane->id, lane->mode,
lane->submode)) {
dev_err(lane->dev, "invalid COMPHY mode\n" );
return -EINVAL;
}
switch (lane->mode) {
case PHY_MODE_USB_HOST_SS:
dev_dbg(lane->dev, "set lane %d to USB3 host mode\n" , lane->id);
return mvebu_a3700_comphy_usb3_power_on(lane);
case PHY_MODE_SATA:
dev_dbg(lane->dev, "set lane %d to SATA mode\n" , lane->id);
return mvebu_a3700_comphy_sata_power_on(lane);
case PHY_MODE_ETHERNET:
dev_dbg(lane->dev, "set lane %d to Ethernet mode\n" , lane->id);
return mvebu_a3700_comphy_ethernet_power_on(lane);
case PHY_MODE_PCIE:
dev_dbg(lane->dev, "set lane %d to PCIe mode\n" , lane->id);
return mvebu_a3700_comphy_pcie_power_on(lane);
default :
dev_err(lane->dev, "unsupported PHY mode (%d)\n" , lane->mode);
return -EOPNOTSUPP;
}
}
static int mvebu_a3700_comphy_power_off(struct phy *phy)
{
struct mvebu_a3700_comphy_lane *lane = phy_get_drvdata(phy);
switch (lane->id) {
case 0 :
mvebu_a3700_comphy_usb3_power_off(lane);
mvebu_a3700_comphy_ethernet_power_off(lane);
return 0 ;
case 1 :
mvebu_a3700_comphy_pcie_power_off(lane);
mvebu_a3700_comphy_ethernet_power_off(lane);
return 0 ;
case 2 :
mvebu_a3700_comphy_usb3_power_off(lane);
mvebu_a3700_comphy_sata_power_off(lane);
return 0 ;
default :
dev_err(lane->dev, "invalid COMPHY mode\n" );
return -EINVAL;
}
}
static const struct phy_ops mvebu_a3700_comphy_ops = {
.power_on = mvebu_a3700_comphy_power_on,
.power_off = mvebu_a3700_comphy_power_off,
.set_mode = mvebu_a3700_comphy_set_mode,
.owner = THIS_MODULE,
};
static struct phy *mvebu_a3700_comphy_xlate(struct device *dev,
const struct of_phandle_args *args)
{
struct mvebu_a3700_comphy_lane *lane;
unsigned int port;
struct phy *phy;
phy = of_phy_simple_xlate(dev, args);
if (IS_ERR(phy))
return phy;
lane = phy_get_drvdata(phy);
port = args->args[0 ];
if (port != 0 && (port != 1 || lane->id != 0 )) {
dev_err(lane->dev, "invalid port number %u\n" , port);
return ERR_PTR(-EINVAL);
}
lane->invert_tx = args->args[1 ] & BIT(0 );
lane->invert_rx = args->args[1 ] & BIT(1 );
return phy;
}
static int mvebu_a3700_comphy_probe(struct platform_device *pdev)
{
struct mvebu_a3700_comphy_priv *priv;
struct phy_provider *provider;
struct device_node *child;
struct resource *res;
struct clk *clk;
int ret;
priv = devm_kzalloc(&pdev->dev, sizeof (*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
spin_lock_init(&priv->lock);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "comphy" );
priv->comphy_regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(priv->comphy_regs))
return PTR_ERR(priv->comphy_regs);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"lane1_pcie_gbe" );
priv->lane1_phy_regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(priv->lane1_phy_regs))
return PTR_ERR(priv->lane1_phy_regs);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"lane0_usb3_gbe" );
priv->lane0_phy_regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(priv->lane0_phy_regs))
return PTR_ERR(priv->lane0_phy_regs);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"lane2_sata_usb3" );
priv->lane2_phy_indirect = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(priv->lane2_phy_indirect))
return PTR_ERR(priv->lane2_phy_indirect);
/*
* Driver needs to know if reference xtal clock is 40 MHz or 25 MHz .
* Old DT bindings do not have xtal clk present . So do not fail here
* and expects that default 25 MHz reference clock is used .
*/
clk = clk_get(&pdev->dev, "xtal" );
if (IS_ERR(clk)) {
if (PTR_ERR(clk) == -EPROBE_DEFER)
return -EPROBE_DEFER;
dev_warn(&pdev->dev, "missing 'xtal' clk (%ld)\n" ,
PTR_ERR(clk));
} else {
ret = clk_prepare_enable(clk);
if (ret) {
dev_warn(&pdev->dev, "enabling xtal clk failed (%d)\n" ,
ret);
} else {
if (clk_get_rate(clk) == 40000000 )
priv->xtal_is_40m = true ;
clk_disable_unprepare(clk);
}
clk_put(clk);
}
dev_set_drvdata(&pdev->dev, priv);
for_each_available_child_of_node(pdev->dev.of_node, child) {
struct mvebu_a3700_comphy_lane *lane;
struct phy *phy;
int ret;
u32 lane_id;
ret = of_property_read_u32(child, "reg" , &lane_id);
if (ret < 0 ) {
dev_err(&pdev->dev, "missing 'reg' property (%d)\n" ,
ret);
continue ;
}
if (lane_id >= 3 ) {
dev_err(&pdev->dev, "invalid 'reg' property\n" );
continue ;
}
lane = devm_kzalloc(&pdev->dev, sizeof (*lane), GFP_KERNEL);
if (!lane) {
of_node_put(child);
return -ENOMEM;
}
phy = devm_phy_create(&pdev->dev, child,
&mvebu_a3700_comphy_ops);
if (IS_ERR(phy)) {
of_node_put(child);
return PTR_ERR(phy);
}
lane->priv = priv;
lane->dev = &pdev->dev;
lane->mode = PHY_MODE_INVALID;
lane->submode = PHY_INTERFACE_MODE_NA;
lane->id = lane_id;
lane->invert_tx = false ;
lane->invert_rx = false ;
phy_set_drvdata(phy, lane);
/*
* To avoid relying on the bootloader / firmware configuration ,
* power off all comphys .
*/
mvebu_a3700_comphy_power_off(phy);
}
provider = devm_of_phy_provider_register(&pdev->dev,
mvebu_a3700_comphy_xlate);
return PTR_ERR_OR_ZERO(provider);
}
static const struct of_device_id mvebu_a3700_comphy_of_match_table[] = {
{ .compatible = "marvell,comphy-a3700" },
{ },
};
MODULE_DEVICE_TABLE(of, mvebu_a3700_comphy_of_match_table);
static struct platform_driver mvebu_a3700_comphy_driver = {
.probe = mvebu_a3700_comphy_probe,
.driver = {
.name = "mvebu-a3700-comphy" ,
.of_match_table = mvebu_a3700_comphy_of_match_table,
},
};
module_platform_driver(mvebu_a3700_comphy_driver);
MODULE_AUTHOR("Miquèl Raynal <miquel.raynal@bootlin.com>" );
MODULE_AUTHOR("Pali Rohár <pali@kernel.org>" );
MODULE_AUTHOR("Marek Behún <kabel@kernel.org>" );
MODULE_DESCRIPTION("Common PHY driver for A3700" );
MODULE_LICENSE("GPL v2" );
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¤ Dauer der Verarbeitung: 0.26 Sekunden
(vorverarbeitet am 2026-09-27)
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