| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (C) 2018 Marvell |
| * |
| * Authors: |
| * Evan Wang <xswang@marvell.com> |
| * Miquèl Raynal <miquel.raynal@bootlin.com> |
| * Pali Rohár <pali@kernel.org> |
| * Marek Behún <kabel@kernel.org> |
| * |
| * Structure inspired from phy-mvebu-cp110-comphy.c written by Antoine Tenart. |
| * Comphy code from ARM Trusted Firmware ported by Pali Rohár <pali@kernel.org> |
| * and Marek Behún <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 0x0 |
| #define COMPHY_LANE2_INDIR_DATA 0x4 |
| |
| /* SATA and USB3 PHY offset compared to SATA PHY */ |
| #define COMPHY_LANE2_REGS_BASE 0x200 |
| |
| /* |
| * 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) & 0x7FF) << 1) |
| |
| /* COMPHY registers */ |
| #define COMPHY_POWER_PLL_CTRL 0x01 |
| #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, 0x1) |
| #define REF_FREF_SEL_SERDES_40MHZ FIELD_PREP(REF_FREF_SEL_MASK, 0x3) |
| #define REF_FREF_SEL_SERDES_50MHZ FIELD_PREP(REF_FREF_SEL_MASK, 0x4) |
| #define REF_FREF_SEL_PCIE_USB3_25MHZ FIELD_PREP(REF_FREF_SEL_MASK, 0x2) |
| #define REF_FREF_SEL_PCIE_USB3_40MHZ FIELD_PREP(REF_FREF_SEL_MASK, 0x3) |
| #define COMPHY_MODE_MASK GENMASK(7, 5) |
| #define COMPHY_MODE_SATA FIELD_PREP(COMPHY_MODE_MASK, 0x0) |
| #define COMPHY_MODE_PCIE FIELD_PREP(COMPHY_MODE_MASK, 0x3) |
| #define COMPHY_MODE_SERDES FIELD_PREP(COMPHY_MODE_MASK, 0x4) |
| #define COMPHY_MODE_USB3 FIELD_PREP(COMPHY_MODE_MASK, 0x5) |
| |
| #define COMPHY_KVCO_CAL_CTRL 0x02 |
| #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, 0x10) |
| |
| #define COMPHY_DIG_LOOPBACK_EN 0x23 |
| #define SEL_DATA_WIDTH_MASK GENMASK(11, 10) |
| #define DATA_WIDTH_10BIT FIELD_PREP(SEL_DATA_WIDTH_MASK, 0x0) |
| #define DATA_WIDTH_20BIT FIELD_PREP(SEL_DATA_WIDTH_MASK, 0x1) |
| #define DATA_WIDTH_40BIT FIELD_PREP(SEL_DATA_WIDTH_MASK, 0x2) |
| #define PLL_READY_TX_BIT BIT(4) |
| |
| #define COMPHY_SYNC_PATTERN 0x24 |
| #define TXD_INVERT_BIT BIT(10) |
| #define RXD_INVERT_BIT BIT(11) |
| |
| #define COMPHY_SYNC_MASK_GEN 0x25 |
| #define PHY_GEN_MAX_MASK GENMASK(11, 10) |
| #define PHY_GEN_MAX_USB3_5G FIELD_PREP(PHY_GEN_MAX_MASK, 0x1) |
| |
| #define COMPHY_ISOLATION_CTRL 0x26 |
| #define PHY_ISOLATE_MODE BIT(15) |
| |
| #define COMPHY_GEN2_SET2 0x3e |
| #define GS2_TX_SSC_AMP_MASK GENMASK(15, 9) |
| #define GS2_TX_SSC_AMP_4128 FIELD_PREP(GS2_TX_SSC_AMP_MASK, 0x20) |
| #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,\ |
| 0x0) |
| #define GS2_VREG_RXTX_MAS_ISET_80U FIELD_PREP(GS2_VREG_RXTX_MAS_ISET_MASK,\ |
| 0x1) |
| #define GS2_VREG_RXTX_MAS_ISET_100U FIELD_PREP(GS2_VREG_RXTX_MAS_ISET_MASK,\ |
| 0x2) |
| #define GS2_VREG_RXTX_MAS_ISET_120U FIELD_PREP(GS2_VREG_RXTX_MAS_ISET_MASK,\ |
| 0x3) |
| #define GS2_RSVD_6_0_MASK GENMASK(6, 0) |
| |
| #define COMPHY_GEN3_SET2 0x3f |
| |
| #define COMPHY_IDLE_SYNC_EN 0x48 |
| #define IDLE_SYNC_EN BIT(12) |
| |
| #define COMPHY_MISC_CTRL0 0x4F |
| #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 0x52 |
| #define SFT_RST BIT(9) |
| #define SFT_RST_NO_REG BIT(10) |
| |
| #define COMPHY_MISC_CTRL1 0x73 |
| #define SEL_BITS_PCIE_FORCE BIT(15) |
| |
| #define COMPHY_GEN2_SET3 0x112 |
| #define GS3_FFE_CAP_SEL_MASK GENMASK(3, 0) |
| #define GS3_FFE_CAP_SEL_VALUE FIELD_PREP(GS3_FFE_CAP_SEL_MASK, 0xF) |
| |
| /* PIPE registers */ |
| #define COMPHY_PIPE_LANE_CFG0 0x180 |
| #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 0x181 |
| #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 0x183 |
| #define TXDCLK_PCLK_EN BIT(0) |
| |
| #define COMPHY_PIPE_LANE_CFG4 0x188 |
| #define SPREAD_SPECTRUM_CLK_EN BIT(7) |
| |
| #define COMPHY_PIPE_RST_CLK_CTRL 0x1C1 |
| #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, 0x2) |
| |
| #define COMPHY_PIPE_TEST_MODE_CTRL 0x1C2 |
| #define MODE_MARGIN_OVERRIDE BIT(2) |
| |
| #define COMPHY_PIPE_CLK_SRC_LO 0x1C3 |
| #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 0x1D0 |
| #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, 0x1) |
| #define CFG_PM_RXDLOZ_WAIT_MASK GENMASK(7, 0) |
| #define CFG_PM_RXDLOZ_WAIT_7_UNIT FIELD_PREP(CFG_PM_RXDLOZ_WAIT_MASK, 0x7) |
| #define CFG_PM_RXDLOZ_WAIT_12_UNIT FIELD_PREP(CFG_PM_RXDLOZ_WAIT_MASK, 0xC) |
| |
| /* |
| * 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 0x0E |
| #define PHYCTRL_FRM_PIN_BIT BIT(13) |
| |
| /* South Bridge PHY Configuration Registers */ |
| #define COMPHY_PHY_REG(lane, reg) (((1 - (lane)) * 0x28) + ((reg) & 0x3f)) |
| |
| /* |
| * lane0: USB3/GbE1 PHY Configuration 1 |
| * lane1: PCIe/GbE0 PHY Configuration 1 |
| * (used only by SGMII code) |
| */ |
| #define COMPHY_PHY_CFG1 0x0 |
| #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 0x6 |
| #define SERDES_SPEED_3_125_G 0x8 |
| #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 0x18 |
| #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 0xFC |
| /* 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[] = { |
| { 0x005, 0x07CC }, { 0x015, 0x0000 }, { 0x01B, 0x0000 }, |
| { 0x01D, 0x0000 }, { 0x01E, 0x0000 }, { 0x01F, 0x0000 }, |
| { 0x020, 0x0000 }, { 0x021, 0x0030 }, { 0x026, 0x0888 }, |
| { 0x04D, 0x0152 }, { 0x04F, 0xA020 }, { 0x050, 0x07CC }, |
| { 0x053, 0xE9CA }, { 0x055, 0xBD97 }, { 0x071, 0x3015 }, |
| { 0x076, 0x03AA }, { 0x07C, 0x0FDF }, { 0x0C2, 0x3030 }, |
| { 0x0C3, 0x8000 }, { 0x0E2, 0x5550 }, { 0x0E3, 0x12A4 }, |
| { 0x0E4, 0x7D00 }, { 0x0E6, 0x0C83 }, { 0x101, 0xFCC0 }, |
| { 0x104, 0x0C10 } |
| }; |
| |
| /* 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 */ |
| 0x3110, 0xFD83, 0x6430, 0x412F, 0x82C0, 0x06FA, 0x4500, 0x6D26, /* 00 */ |
| 0xAFC0, 0x8000, 0xC000, 0x0000, 0x2000, 0x49CC, 0x0BC9, 0x2A52, /* 08 */ |
| 0x0BD2, 0x0CDE, 0x13D2, 0x0CE8, 0x1149, 0x10E0, 0x0000, 0x0000, /* 10 */ |
| 0x0000, 0x0000, 0x0000, 0x0001, 0x0000, 0x4134, 0x0D2D, 0xFFFF, /* 18 */ |
| 0xFFE0, 0x4030, 0x1016, 0x0030, 0x0000, 0x0800, 0x0866, 0x0000, /* 20 */ |
| 0x0000, 0x0000, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, /* 28 */ |
| 0xFFFF, 0xFFFF, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /* 30 */ |
| 0x0000, 0x0000, 0x000F, 0x6A62, 0x1988, 0x3100, 0x3100, 0x3100, /* 38 */ |
| 0x3100, 0xA708, 0x2430, 0x0830, 0x1030, 0x4610, 0xFF00, 0xFF00, /* 40 */ |
| 0x0060, 0x1000, 0x0400, 0x0040, 0x00F0, 0x0155, 0x1100, 0xA02A, /* 48 */ |
| 0x06FA, 0x0080, 0xB008, 0xE3ED, 0x5002, 0xB592, 0x7A80, 0x0001, /* 50 */ |
| 0x020A, 0x8820, 0x6014, 0x8054, 0xACAA, 0xFC88, 0x2A02, 0x45CF, /* 58 */ |
| 0x000F, 0x1817, 0x2860, 0x064F, 0x0000, 0x0204, 0x1800, 0x6000, /* 60 */ |
| 0x810F, 0x4F23, 0x4000, 0x4498, 0x0850, 0x0000, 0x000E, 0x1002, /* 68 */ |
| 0x9D3A, 0x3009, 0xD066, 0x0491, 0x0001, 0x6AB0, 0x0399, 0x3780, /* 70 */ |
| 0x0040, 0x5AC0, 0x4A80, 0x0000, 0x01DF, 0x0000, 0x0007, 0x0000, /* 78 */ |
| 0x2D54, 0x00A1, 0x4000, 0x0100, 0xA20A, 0x0000, 0x0000, 0x0000, /* 80 */ |
| 0x0000, 0x0000, 0x0000, 0x7400, 0x0E81, 0x1000, 0x1242, 0x0210, /* 88 */ |
| 0x80DF, 0x0F1F, 0x2F3F, 0x4F5F, 0x6F7F, 0x0F1F, 0x2F3F, 0x4F5F, /* 90 */ |
| 0x6F7F, 0x4BAD, 0x0000, 0x0000, 0x0800, 0x0000, 0x2400, 0xB651, /* 98 */ |
| 0xC9E0, 0x4247, 0x0A24, 0x0000, 0xAF19, 0x1004, 0x0000, 0x0000, /* A0 */ |
| 0x0000, 0x0013, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /* A8 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /* B0 */ |
| 0x0000, 0x0000, 0x0000, 0x0060, 0x0000, 0x0000, 0x0000, 0x0000, /* B8 */ |
| 0x0000, 0x0000, 0x3010, 0xFA00, 0x0000, 0x0000, 0x0000, 0x0003, /* C0 */ |
| 0x1618, 0x8200, 0x8000, 0x0400, 0x050F, 0x0000, 0x0000, 0x0000, /* C8 */ |
| 0x4C93, 0x0000, 0x1000, 0x1120, 0x0010, 0x1242, 0x1242, 0x1E00, /* D0 */ |
| 0x0000, 0x0000, 0x0000, 0x00F8, 0x0000, 0x0041, 0x0800, 0x0000, /* D8 */ |
| 0x82A0, 0x572E, 0x2490, 0x14A9, 0x4E00, 0x0000, 0x0803, 0x0541, /* E0 */ |
| 0x0C15, 0x0000, 0x0000, 0x0400, 0x2626, 0x0000, 0x0000, 0x4200, /* E8 */ |
| 0x0000, 0xAA55, 0x1020, 0x0000, 0x0000, 0x5010, 0x0000, 0x0000, /* F0 */ |
| 0x0000, 0x0000, 0x5000, 0x0000, 0x0000, 0x0000, 0x02F2, 0x0000, /* F8 */ |
| 0x101F, 0xFDC0, 0x4000, 0x8010, 0x0110, 0x0006, 0x0000, 0x0000, /*100 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*108 */ |
| 0x04CF, 0x0000, 0x04CF, 0x0000, 0x04CF, 0x0000, 0x04C6, 0x0000, /*110 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*118 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*120 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*128 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*130 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*138 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*140 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*148 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*150 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*158 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*160 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*168 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*170 */ |
| 0x0000, 0x0000, 0x0000, 0x00F0, 0x08A2, 0x3112, 0x0A14, 0x0000, /*178 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*180 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*188 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*190 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*198 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*1A0 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*1A8 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*1B0 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*1B8 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*1C0 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*1C8 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*1D0 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*1D8 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*1E0 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*1E8 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*1F0 */ |
| 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 /*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, |
| 0x0, PHY_ISOLATE_MODE); |
| |
| /* 0. Check the Polarity invert bits */ |
| data = 0x0; |
| 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, |
| 0x0, 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 + 0xe00a0, 0, 0xffffffff); |
| * reg_set(MVEBU_REGS_BASE + 0xe00a4, 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 < 512; addr++) { |
| /* |
| * All PHY register values are defined in full for 3.125Gbps |
| * 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 && gbe_phy_init_fix[fix_idx].addr == addr) { |
| /* Use new value */ |
| val = gbe_phy_init_fix[fix_idx].value; |
| if (fix_idx < ARRAY_SIZE(gbe_phy_init_fix)) |
| fix_idx++; |
| } else { |
| val = gbe_phy_init[addr]; |
| } |
| |
| comphy_lane_reg_set(lane, addr, val, 0xFFFF); |
| } |
| } |
| |
| 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 = 0x0; |
| 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 10mS 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 = 0x0; |
| 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 0x3F |
| * for real chip during COMPHY power on. |
| * The value of the DFE_UPDATE_EN already is 0x3F, 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 = 0x0; |
| 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, 0x0, 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(0x5d034), bit 4, Power up OTG module The |
| * register belong to UTMI module, so it is set in UTMI phy driver. |
| */ |
| |
| /* |
| * 1. Set PRD_TXDEEMPH (3.5db 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 -3.5db |
| * 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, 0xFFFF); |
| |
| /* |
| * 5. Set Lane-to-Lane Bundle Clock Sampling Period = per PCLK cycles |
| * set Mode Clock Source = PCLK is generated from REFCLK |
| */ |
| data = 0x0; |
| 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 4K |
| */ |
| 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 500M 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, 0xFFFF); |
| |
| /* |
| * 12. Override Speed_PLL value and use MAC PLL |
| */ |
| data = SPEED_PLL_VALUE_16 | USE_MAX_PLL_RATE_BIT; |
| mask = 0xFFFF; |
| comphy_lane_reg_set(lane, COMPHY_KVCO_CAL_CTRL, data, mask); |
| |
| /* |
| * 13. Check the Polarity invert bit |
| */ |
| data = 0x0; |
| 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 5Gbps |
| */ |
| 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 0xF |
| */ |
| 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 = 0xFFFF; |
| 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, 0xd0074814, 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 = 0xFFFF; |
| 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, |
| 0xFFFF); |
| |
| /* 10. Check the Polarity invert bit */ |
| data = 0x0; |
| 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, |
| 0x0, 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, |
| 0x0, 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 40MHz or 25MHz. |
| * Old DT bindings do not have xtal clk present. So do not fail here |
| * and expects that default 25MHz 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"); |
