// SPDX-License-Identifier: (GPL-2.0 OR MIT) /* * SerDes PHY driver for Microsemi Ocelot * * Copyright (c) 2018 Microsemi * */ #include #include #include #include #include #include #include #include #include #include #include struct serdes_ctrl { struct regmap *regs; struct device *dev; struct phy *phys[SERDES_MAX]; }; struct serdes_macro { u8 idx; /* Not used when in QSGMII or PCIe mode */ int port; struct serdes_ctrl *ctrl; }; #define MCB_S6G_CFG_TIMEOUT 50 static int __serdes_write_mcb_s6g(struct regmap *regmap, u8 macro, u32 op) { unsigned int regval = 0; regmap_write(regmap, HSIO_MCB_S6G_ADDR_CFG, op | HSIO_MCB_S6G_ADDR_CFG_SERDES6G_ADDR(BIT(macro))); return regmap_read_poll_timeout(regmap, HSIO_MCB_S6G_ADDR_CFG, regval, (regval & op) != op, 100, MCB_S6G_CFG_TIMEOUT * 1000); } static int serdes_commit_mcb_s6g(struct regmap *regmap, u8 macro) { return __serdes_write_mcb_s6g(regmap, macro, HSIO_MCB_S6G_ADDR_CFG_SERDES6G_WR_ONE_SHOT); } static int serdes_update_mcb_s6g(struct regmap *regmap, u8 macro) { return __serdes_write_mcb_s6g(regmap, macro, HSIO_MCB_S6G_ADDR_CFG_SERDES6G_RD_ONE_SHOT); } static int serdes_init_s6g(struct regmap *regmap, u8 serdes, int mode) { u32 pll_fsm_ctrl_data; u32 ob_ena1v_mode; u32 des_bw_ana; u32 ob_ena_cas; u32 if_mode; u32 ob_lev; u32 qrate; int ret; if (mode == PHY_INTERFACE_MODE_QSGMII) { pll_fsm_ctrl_data = 120; ob_ena1v_mode = 0; ob_ena_cas = 0; des_bw_ana = 5; ob_lev = 24; if_mode = 3; qrate = 0; } else { pll_fsm_ctrl_data = 60; ob_ena1v_mode = 1; ob_ena_cas = 2; des_bw_ana = 3; ob_lev = 48; if_mode = 1; qrate = 1; } ret = serdes_update_mcb_s6g(regmap, serdes); if (ret) return ret; /* Test pattern */ regmap_update_bits(regmap, HSIO_S6G_COMMON_CFG, HSIO_S6G_COMMON_CFG_SYS_RST, 0); regmap_update_bits(regmap, HSIO_S6G_PLL_CFG, HSIO_S6G_PLL_CFG_PLL_FSM_ENA, 0); regmap_update_bits(regmap, HSIO_S6G_IB_CFG, HSIO_S6G_IB_CFG_IB_SIG_DET_ENA | HSIO_S6G_IB_CFG_IB_REG_ENA | HSIO_S6G_IB_CFG_IB_SAM_ENA | HSIO_S6G_IB_CFG_IB_EQZ_ENA | HSIO_S6G_IB_CFG_IB_CONCUR | HSIO_S6G_IB_CFG_IB_CAL_ENA, HSIO_S6G_IB_CFG_IB_SIG_DET_ENA | HSIO_S6G_IB_CFG_IB_REG_ENA | HSIO_S6G_IB_CFG_IB_SAM_ENA | HSIO_S6G_IB_CFG_IB_EQZ_ENA | HSIO_S6G_IB_CFG_IB_CONCUR); regmap_update_bits(regmap, HSIO_S6G_IB_CFG1, HSIO_S6G_IB_CFG1_IB_FRC_OFFSET | HSIO_S6G_IB_CFG1_IB_FRC_LP | HSIO_S6G_IB_CFG1_IB_FRC_MID | HSIO_S6G_IB_CFG1_IB_FRC_HP | HSIO_S6G_IB_CFG1_IB_FILT_OFFSET | HSIO_S6G_IB_CFG1_IB_FILT_LP | HSIO_S6G_IB_CFG1_IB_FILT_MID | HSIO_S6G_IB_CFG1_IB_FILT_HP, HSIO_S6G_IB_CFG1_IB_FILT_OFFSET | HSIO_S6G_IB_CFG1_IB_FILT_HP | HSIO_S6G_IB_CFG1_IB_FILT_LP | HSIO_S6G_IB_CFG1_IB_FILT_MID); regmap_update_bits(regmap, HSIO_S6G_IB_CFG2, HSIO_S6G_IB_CFG2_IB_UREG_M, HSIO_S6G_IB_CFG2_IB_UREG(4)); regmap_update_bits(regmap, HSIO_S6G_IB_CFG3, HSIO_S6G_IB_CFG3_IB_INI_OFFSET_M | HSIO_S6G_IB_CFG3_IB_INI_LP_M | HSIO_S6G_IB_CFG3_IB_INI_MID_M | HSIO_S6G_IB_CFG3_IB_INI_HP_M, HSIO_S6G_IB_CFG3_IB_INI_OFFSET(31) | HSIO_S6G_IB_CFG3_IB_INI_LP(1) | HSIO_S6G_IB_CFG3_IB_INI_MID(31) | HSIO_S6G_IB_CFG3_IB_INI_HP(0)); regmap_update_bits(regmap, HSIO_S6G_MISC_CFG, HSIO_S6G_MISC_CFG_LANE_RST, HSIO_S6G_MISC_CFG_LANE_RST); ret = serdes_commit_mcb_s6g(regmap, serdes); if (ret) return ret; /* OB + DES + IB + SER CFG */ regmap_update_bits(regmap, HSIO_S6G_OB_CFG, HSIO_S6G_OB_CFG_OB_IDLE | HSIO_S6G_OB_CFG_OB_ENA1V_MODE | HSIO_S6G_OB_CFG_OB_POST0_M | HSIO_S6G_OB_CFG_OB_PREC_M, (ob_ena1v_mode ? HSIO_S6G_OB_CFG_OB_ENA1V_MODE : 0) | HSIO_S6G_OB_CFG_OB_POST0(0) | HSIO_S6G_OB_CFG_OB_PREC(0)); regmap_update_bits(regmap, HSIO_S6G_OB_CFG1, HSIO_S6G_OB_CFG1_OB_ENA_CAS_M | HSIO_S6G_OB_CFG1_OB_LEV_M, HSIO_S6G_OB_CFG1_OB_LEV(ob_lev) | HSIO_S6G_OB_CFG1_OB_ENA_CAS(ob_ena_cas)); regmap_update_bits(regmap, HSIO_S6G_DES_CFG, HSIO_S6G_DES_CFG_DES_PHS_CTRL_M | HSIO_S6G_DES_CFG_DES_CPMD_SEL_M | HSIO_S6G_DES_CFG_DES_BW_ANA_M, HSIO_S6G_DES_CFG_DES_PHS_CTRL(2) | HSIO_S6G_DES_CFG_DES_CPMD_SEL(0) | HSIO_S6G_DES_CFG_DES_BW_ANA(des_bw_ana)); regmap_update_bits(regmap, HSIO_S6G_IB_CFG, HSIO_S6G_IB_CFG_IB_SIG_DET_CLK_SEL_M | HSIO_S6G_IB_CFG_IB_REG_PAT_SEL_OFFSET_M, HSIO_S6G_IB_CFG_IB_REG_PAT_SEL_OFFSET(0) | HSIO_S6G_IB_CFG_IB_SIG_DET_CLK_SEL(0)); regmap_update_bits(regmap, HSIO_S6G_IB_CFG1, HSIO_S6G_IB_CFG1_IB_TSDET_M, HSIO_S6G_IB_CFG1_IB_TSDET(16)); regmap_update_bits(regmap, HSIO_S6G_SER_CFG, HSIO_S6G_SER_CFG_SER_ALISEL_M | HSIO_S6G_SER_CFG_SER_ENALI, HSIO_S6G_SER_CFG_SER_ALISEL(0)); regmap_update_bits(regmap, HSIO_S6G_PLL_CFG, HSIO_S6G_PLL_CFG_PLL_DIV4 | HSIO_S6G_PLL_CFG_PLL_ENA_ROT | HSIO_S6G_PLL_CFG_PLL_FSM_CTRL_DATA_M | HSIO_S6G_PLL_CFG_PLL_ROT_DIR | HSIO_S6G_PLL_CFG_PLL_ROT_FRQ, HSIO_S6G_PLL_CFG_PLL_FSM_CTRL_DATA (pll_fsm_ctrl_data)); regmap_update_bits(regmap, HSIO_S6G_COMMON_CFG, HSIO_S6G_COMMON_CFG_SYS_RST | HSIO_S6G_COMMON_CFG_ENA_LANE | HSIO_S6G_COMMON_CFG_PWD_RX | HSIO_S6G_COMMON_CFG_PWD_TX | HSIO_S6G_COMMON_CFG_HRATE | HSIO_S6G_COMMON_CFG_QRATE | HSIO_S6G_COMMON_CFG_ENA_ELOOP | HSIO_S6G_COMMON_CFG_ENA_FLOOP | HSIO_S6G_COMMON_CFG_IF_MODE_M, HSIO_S6G_COMMON_CFG_SYS_RST | HSIO_S6G_COMMON_CFG_ENA_LANE | (qrate ? HSIO_S6G_COMMON_CFG_QRATE : 0) | HSIO_S6G_COMMON_CFG_IF_MODE(if_mode)); regmap_update_bits(regmap, HSIO_S6G_MISC_CFG, HSIO_S6G_MISC_CFG_LANE_RST | HSIO_S6G_MISC_CFG_DES_100FX_CPMD_ENA | HSIO_S6G_MISC_CFG_RX_LPI_MODE_ENA | HSIO_S6G_MISC_CFG_TX_LPI_MODE_ENA, HSIO_S6G_MISC_CFG_LANE_RST | HSIO_S6G_MISC_CFG_RX_LPI_MODE_ENA); ret = serdes_commit_mcb_s6g(regmap, serdes); if (ret) return ret; regmap_update_bits(regmap, HSIO_S6G_PLL_CFG, HSIO_S6G_PLL_CFG_PLL_FSM_ENA, HSIO_S6G_PLL_CFG_PLL_FSM_ENA); ret = serdes_commit_mcb_s6g(regmap, serdes); if (ret) return ret; /* Wait for PLL bringup */ msleep(20); regmap_update_bits(regmap, HSIO_S6G_IB_CFG, HSIO_S6G_IB_CFG_IB_CAL_ENA, HSIO_S6G_IB_CFG_IB_CAL_ENA); regmap_update_bits(regmap, HSIO_S6G_MISC_CFG, HSIO_S6G_MISC_CFG_LANE_RST, 0); ret = serdes_commit_mcb_s6g(regmap, serdes); if (ret) return ret; /* Wait for calibration */ msleep(60); regmap_update_bits(regmap, HSIO_S6G_IB_CFG, HSIO_S6G_IB_CFG_IB_REG_PAT_SEL_OFFSET_M | HSIO_S6G_IB_CFG_IB_SIG_DET_CLK_SEL_M, HSIO_S6G_IB_CFG_IB_REG_PAT_SEL_OFFSET(0) | HSIO_S6G_IB_CFG_IB_SIG_DET_CLK_SEL(7)); regmap_update_bits(regmap, HSIO_S6G_IB_CFG1, HSIO_S6G_IB_CFG1_IB_TSDET_M, HSIO_S6G_IB_CFG1_IB_TSDET(3)); /* IB CFG */ return 0; } #define MCB_S1G_CFG_TIMEOUT 50 static int __serdes_write_mcb_s1g(struct regmap *regmap, u8 macro, u32 op) { unsigned int regval; regmap_write(regmap, HSIO_MCB_S1G_ADDR_CFG, op | HSIO_MCB_S1G_ADDR_CFG_SERDES1G_ADDR(BIT(macro))); return regmap_read_poll_timeout(regmap, HSIO_MCB_S1G_ADDR_CFG, regval, (regval & op) != op, 100, MCB_S1G_CFG_TIMEOUT * 1000); } static int serdes_commit_mcb_s1g(struct regmap *regmap, u8 macro) { return __serdes_write_mcb_s1g(regmap, macro, HSIO_MCB_S1G_ADDR_CFG_SERDES1G_WR_ONE_SHOT); } static int serdes_update_mcb_s1g(struct regmap *regmap, u8 macro) { return __serdes_write_mcb_s1g(regmap, macro, HSIO_MCB_S1G_ADDR_CFG_SERDES1G_RD_ONE_SHOT); } static int serdes_init_s1g(struct regmap *regmap, u8 serdes) { int ret; ret = serdes_update_mcb_s1g(regmap, serdes); if (ret) return ret; regmap_update_bits(regmap, HSIO_S1G_COMMON_CFG, HSIO_S1G_COMMON_CFG_SYS_RST | HSIO_S1G_COMMON_CFG_ENA_LANE | HSIO_S1G_COMMON_CFG_ENA_ELOOP | HSIO_S1G_COMMON_CFG_ENA_FLOOP, HSIO_S1G_COMMON_CFG_ENA_LANE); regmap_update_bits(regmap, HSIO_S1G_PLL_CFG, HSIO_S1G_PLL_CFG_PLL_FSM_ENA | HSIO_S1G_PLL_CFG_PLL_FSM_CTRL_DATA_M, HSIO_S1G_PLL_CFG_PLL_FSM_CTRL_DATA(200) | HSIO_S1G_PLL_CFG_PLL_FSM_ENA); regmap_update_bits(regmap, HSIO_S1G_MISC_CFG, HSIO_S1G_MISC_CFG_DES_100FX_CPMD_ENA | HSIO_S1G_MISC_CFG_LANE_RST, HSIO_S1G_MISC_CFG_LANE_RST); ret = serdes_commit_mcb_s1g(regmap, serdes); if (ret) return ret; regmap_update_bits(regmap, HSIO_S1G_COMMON_CFG, HSIO_S1G_COMMON_CFG_SYS_RST, HSIO_S1G_COMMON_CFG_SYS_RST); regmap_update_bits(regmap, HSIO_S1G_MISC_CFG, HSIO_S1G_MISC_CFG_LANE_RST, 0); ret = serdes_commit_mcb_s1g(regmap, serdes); if (ret) return ret; return 0; } struct serdes_mux { u8 idx; u8 port; enum phy_mode mode; int submode; u32 mask; u32 mux; }; #define SERDES_MUX(_idx, _port, _mode, _submode, _mask, _mux) { \ .idx = _idx, \ .port = _port, \ .mode = _mode, \ .submode = _submode, \ .mask = _mask, \ .mux = _mux, \ } #define SERDES_MUX_SGMII(i, p, m, c) \ SERDES_MUX(i, p, PHY_MODE_ETHERNET, PHY_INTERFACE_MODE_SGMII, m, c) #define SERDES_MUX_QSGMII(i, p, m, c) \ SERDES_MUX(i, p, PHY_MODE_ETHERNET, PHY_INTERFACE_MODE_QSGMII, m, c) static const struct serdes_mux ocelot_serdes_muxes[] = { SERDES_MUX_SGMII(SERDES1G(0), 0, 0, 0), SERDES_MUX_SGMII(SERDES1G(1), 1, HSIO_HW_CFG_DEV1G_5_MODE, 0), SERDES_MUX_SGMII(SERDES1G(1), 5, HSIO_HW_CFG_QSGMII_ENA | HSIO_HW_CFG_DEV1G_5_MODE, HSIO_HW_CFG_DEV1G_5_MODE), SERDES_MUX_SGMII(SERDES1G(2), 2, HSIO_HW_CFG_DEV1G_4_MODE, 0), SERDES_MUX_SGMII(SERDES1G(2), 4, HSIO_HW_CFG_QSGMII_ENA | HSIO_HW_CFG_DEV1G_4_MODE, HSIO_HW_CFG_DEV1G_4_MODE), SERDES_MUX_SGMII(SERDES1G(3), 3, HSIO_HW_CFG_DEV1G_6_MODE, 0), SERDES_MUX_SGMII(SERDES1G(3), 6, HSIO_HW_CFG_QSGMII_ENA | HSIO_HW_CFG_DEV1G_6_MODE, HSIO_HW_CFG_DEV1G_6_MODE), SERDES_MUX_SGMII(SERDES1G(4), 4, HSIO_HW_CFG_QSGMII_ENA | HSIO_HW_CFG_DEV1G_4_MODE | HSIO_HW_CFG_DEV1G_9_MODE, 0), SERDES_MUX_SGMII(SERDES1G(4), 9, HSIO_HW_CFG_DEV1G_4_MODE | HSIO_HW_CFG_DEV1G_9_MODE, HSIO_HW_CFG_DEV1G_4_MODE | HSIO_HW_CFG_DEV1G_9_MODE), SERDES_MUX_SGMII(SERDES1G(5), 5, HSIO_HW_CFG_QSGMII_ENA | HSIO_HW_CFG_DEV1G_5_MODE | HSIO_HW_CFG_DEV2G5_10_MODE, 0), SERDES_MUX_SGMII(SERDES1G(5), 10, HSIO_HW_CFG_PCIE_ENA | HSIO_HW_CFG_DEV1G_5_MODE | HSIO_HW_CFG_DEV2G5_10_MODE, HSIO_HW_CFG_DEV1G_5_MODE | HSIO_HW_CFG_DEV2G5_10_MODE), SERDES_MUX_QSGMII(SERDES6G(0), 4, HSIO_HW_CFG_QSGMII_ENA, HSIO_HW_CFG_QSGMII_ENA), SERDES_MUX_QSGMII(SERDES6G(0), 5, HSIO_HW_CFG_QSGMII_ENA, HSIO_HW_CFG_QSGMII_ENA), SERDES_MUX_QSGMII(SERDES6G(0), 6, HSIO_HW_CFG_QSGMII_ENA, HSIO_HW_CFG_QSGMII_ENA), SERDES_MUX_SGMII(SERDES6G(0), 7, HSIO_HW_CFG_QSGMII_ENA, 0), SERDES_MUX_QSGMII(SERDES6G(0), 7, HSIO_HW_CFG_QSGMII_ENA, HSIO_HW_CFG_QSGMII_ENA), SERDES_MUX_SGMII(SERDES6G(1), 8, 0, 0), SERDES_MUX_SGMII(SERDES6G(2), 10, HSIO_HW_CFG_PCIE_ENA | HSIO_HW_CFG_DEV2G5_10_MODE, 0), SERDES_MUX(SERDES6G(2), 10, PHY_MODE_PCIE, 0, HSIO_HW_CFG_PCIE_ENA, HSIO_HW_CFG_PCIE_ENA), }; static int serdes_set_mode(struct phy *phy, enum phy_mode mode, int submode) { struct serdes_macro *macro = phy_get_drvdata(phy); unsigned int i; int ret; /* As of now only PHY_MODE_ETHERNET is supported */ if (mode != PHY_MODE_ETHERNET) return -EOPNOTSUPP; for (i = 0; i < ARRAY_SIZE(ocelot_serdes_muxes); i++) { if (macro->idx != ocelot_serdes_muxes[i].idx || mode != ocelot_serdes_muxes[i].mode || submode != ocelot_serdes_muxes[i].submode) continue; if (submode != PHY_INTERFACE_MODE_QSGMII && macro->port != ocelot_serdes_muxes[i].port) continue; ret = regmap_update_bits(macro->ctrl->regs, HSIO_HW_CFG, ocelot_serdes_muxes[i].mask, ocelot_serdes_muxes[i].mux); if (ret) return ret; if (macro->idx <= SERDES1G_MAX) return serdes_init_s1g(macro->ctrl->regs, macro->idx); else if (macro->idx <= SERDES6G_MAX) return serdes_init_s6g(macro->ctrl->regs, macro->idx - (SERDES1G_MAX + 1), ocelot_serdes_muxes[i].submode); /* PCIe not supported yet */ return -EOPNOTSUPP; } return -EINVAL; } static const struct phy_ops serdes_ops = { .set_mode = serdes_set_mode, .owner = THIS_MODULE, }; static struct phy *serdes_simple_xlate(struct device *dev, struct of_phandle_args *args) { struct serdes_ctrl *ctrl = dev_get_drvdata(dev); unsigned int port, idx, i; if (args->args_count != 2) return ERR_PTR(-EINVAL); port = args->args[0]; idx = args->args[1]; for (i = 0; i < SERDES_MAX; i++) { struct serdes_macro *macro = phy_get_drvdata(ctrl->phys[i]); if (idx != macro->idx) continue; /* SERDES6G(0) is the only SerDes capable of QSGMII */ if (idx != SERDES6G(0) && macro->port >= 0) return ERR_PTR(-EBUSY); macro->port = port; return ctrl->phys[i]; } return ERR_PTR(-ENODEV); } static int serdes_phy_create(struct serdes_ctrl *ctrl, u8 idx, struct phy **phy) { struct serdes_macro *macro; *phy = devm_phy_create(ctrl->dev, NULL, &serdes_ops); if (IS_ERR(*phy)) return PTR_ERR(*phy); macro = devm_kzalloc(ctrl->dev, sizeof(*macro), GFP_KERNEL); if (!macro) return -ENOMEM; macro->idx = idx; macro->ctrl = ctrl; macro->port = -1; phy_set_drvdata(*phy, macro); return 0; } static int serdes_probe(struct platform_device *pdev) { struct phy_provider *provider; struct serdes_ctrl *ctrl; unsigned int i; int ret; ctrl = devm_kzalloc(&pdev->dev, sizeof(*ctrl), GFP_KERNEL); if (!ctrl) return -ENOMEM; ctrl->dev = &pdev->dev; ctrl->regs = syscon_node_to_regmap(pdev->dev.parent->of_node); if (IS_ERR(ctrl->regs)) return PTR_ERR(ctrl->regs); for (i = 0; i < SERDES_MAX; i++) { ret = serdes_phy_create(ctrl, i, &ctrl->phys[i]); if (ret) return ret; } dev_set_drvdata(&pdev->dev, ctrl); provider = devm_of_phy_provider_register(ctrl->dev, serdes_simple_xlate); return PTR_ERR_OR_ZERO(provider); } static const struct of_device_id serdes_ids[] = { { .compatible = "mscc,vsc7514-serdes", }, {}, }; MODULE_DEVICE_TABLE(of, serdes_ids); static struct platform_driver mscc_ocelot_serdes = { .probe = serdes_probe, .driver = { .name = "mscc,ocelot-serdes", .of_match_table = of_match_ptr(serdes_ids), }, }; module_platform_driver(mscc_ocelot_serdes); MODULE_AUTHOR("Quentin Schulz "); MODULE_DESCRIPTION("SerDes driver for Microsemi Ocelot"); MODULE_LICENSE("Dual MIT/GPL");