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-rw-r--r--drivers/phy/marvell/phy-mvebu-a3700-comphy.c1375
1 files changed, 1375 insertions, 0 deletions
diff --git a/drivers/phy/marvell/phy-mvebu-a3700-comphy.c b/drivers/phy/marvell/phy-mvebu-a3700-comphy.c
new file mode 100644
index 000000000..d641b345a
--- /dev/null
+++ b/drivers/phy/marvell/phy-mvebu-a3700-comphy.c
@@ -0,0 +1,1375 @@
+// 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/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,
+ 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");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-07 01:11:32 +0000