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header.from=nxp.com; Received: from PAXPR04MB9448.eurprd04.prod.outlook.com (2603:10a6:102:2b1::21) by VI1PR04MB7198.eurprd04.prod.outlook.com (2603:10a6:800:126::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6652.27; Tue, 8 Aug 2023 08:34:13 +0000 Received: from PAXPR04MB9448.eurprd04.prod.outlook.com ([fe80::3505:c499:96d4:1429]) by PAXPR04MB9448.eurprd04.prod.outlook.com ([fe80::3505:c499:96d4:1429%4]) with mapi id 15.20.6652.026; Tue, 8 Aug 2023 08:34:13 +0000 From: Sandor Yu To: andrzej.hajda@intel.com, neil.armstrong@linaro.org, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, airlied@gmail.com, daniel@ffwll.ch, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, shawnguo@kernel.org, s.hauer@pengutronix.de, festevam@gmail.com, vkoul@kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, 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Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add Cadence HDP-TX DisplayPort PHY driver for i.MX8MQ Cadence HDP-TX PHY could be put in either DP mode or HDMI mode base on the configuration chosen. DisplayPort PHY mode is configurated in the driver. Signed-off-by: Sandor Yu --- drivers/phy/freescale/Kconfig | 9 + drivers/phy/freescale/Makefile | 1 + drivers/phy/freescale/phy-fsl-imx8mq-dp.c | 714 ++++++++++++++++++++++ 3 files changed, 724 insertions(+) create mode 100644 drivers/phy/freescale/phy-fsl-imx8mq-dp.c diff --git a/drivers/phy/freescale/Kconfig b/drivers/phy/freescale/Kconfig index 853958fb2c06..2999ba1e57d0 100644 --- a/drivers/phy/freescale/Kconfig +++ b/drivers/phy/freescale/Kconfig @@ -35,6 +35,15 @@ config PHY_FSL_IMX8M_PCIE Enable this to add support for the PCIE PHY as found on i.MX8M family of SOCs. +config PHY_FSL_IMX8MQ_DP_PHY + tristate "Freescale i.MX8MQ DP PHY support" + depends on OF && HAS_IOMEM + depends on COMMON_CLK + select GENERIC_PHY + help + Enable this to support the Cadence HDPTX DP PHY driver + on i.MX8MQ SOC. + endif config PHY_FSL_LYNX_28G diff --git a/drivers/phy/freescale/Makefile b/drivers/phy/freescale/Makefile index cedb328bc4d2..915a429d9fbc 100644 --- a/drivers/phy/freescale/Makefile +++ b/drivers/phy/freescale/Makefile @@ -4,3 +4,4 @@ obj-$(CONFIG_PHY_MIXEL_LVDS_PHY) += phy-fsl-imx8qm-lvds-phy.o obj-$(CONFIG_PHY_MIXEL_MIPI_DPHY) += phy-fsl-imx8-mipi-dphy.o obj-$(CONFIG_PHY_FSL_IMX8M_PCIE) += phy-fsl-imx8m-pcie.o obj-$(CONFIG_PHY_FSL_LYNX_28G) += phy-fsl-lynx-28g.o +obj-$(CONFIG_PHY_FSL_IMX8MQ_DP_PHY) += phy-fsl-imx8mq-dp.o diff --git a/drivers/phy/freescale/phy-fsl-imx8mq-dp.c b/drivers/phy/freescale/phy-fsl-imx8mq-dp.c new file mode 100644 index 000000000000..b1f45c0b27b5 --- /dev/null +++ b/drivers/phy/freescale/phy-fsl-imx8mq-dp.c @@ -0,0 +1,714 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Cadence HDP-TX Display Port Interface (DP) PHY driver + * + * Copyright (C) 2022, 2023 NXP Semiconductor, Inc. + */ +#include +#include +#include +#include +#include +#include +#include + +#include + +#define ADDR_PHY_AFE 0x80000 + +/* PHY registers */ +#define CMN_SSM_BIAS_TMR 0x0022 +#define CMN_PLLSM0_PLLEN_TMR 0x0029 +#define CMN_PLLSM0_PLLPRE_TMR 0x002a +#define CMN_PLLSM0_PLLVREF_TMR 0x002b +#define CMN_PLLSM0_PLLLOCK_TMR 0x002c +#define CMN_PLLSM0_USER_DEF_CTRL 0x002f +#define CMN_PSM_CLK_CTRL 0x0061 +#define CMN_PLL0_VCOCAL_START 0x0081 +#define CMN_PLL0_VCOCAL_INIT_TMR 0x0084 +#define CMN_PLL0_VCOCAL_ITER_TMR 0x0085 +#define CMN_PLL0_INTDIV 0x0094 +#define CMN_PLL0_FRACDIV 0x0095 +#define CMN_PLL0_HIGH_THR 0x0096 +#define CMN_PLL0_DSM_DIAG 0x0097 +#define CMN_PLL0_SS_CTRL2 0x0099 +#define CMN_ICAL_INIT_TMR 0x00c4 +#define CMN_ICAL_ITER_TMR 0x00c5 +#define CMN_RXCAL_INIT_TMR 0x00d4 +#define CMN_RXCAL_ITER_TMR 0x00d5 +#define CMN_TXPUCAL_INIT_TMR 0x00e4 +#define CMN_TXPUCAL_ITER_TMR 0x00e5 +#define CMN_TXPDCAL_INIT_TMR 0x00f4 +#define CMN_TXPDCAL_ITER_TMR 0x00f5 +#define CMN_ICAL_ADJ_INIT_TMR 0x0102 +#define CMN_ICAL_ADJ_ITER_TMR 0x0103 +#define CMN_RX_ADJ_INIT_TMR 0x0106 +#define CMN_RX_ADJ_ITER_TMR 0x0107 +#define CMN_TXPU_ADJ_INIT_TMR 0x010a +#define CMN_TXPU_ADJ_ITER_TMR 0x010b +#define CMN_TXPD_ADJ_INIT_TMR 0x010e +#define CMN_TXPD_ADJ_ITER_TMR 0x010f +#define CMN_DIAG_PLL0_FBH_OVRD 0x01c0 +#define CMN_DIAG_PLL0_FBL_OVRD 0x01c1 +#define CMN_DIAG_PLL0_OVRD 0x01c2 +#define CMN_DIAG_PLL0_TEST_MODE 0x01c4 +#define CMN_DIAG_PLL0_V2I_TUNE 0x01c5 +#define CMN_DIAG_PLL0_CP_TUNE 0x01c6 +#define CMN_DIAG_PLL0_LF_PROG 0x01c7 +#define CMN_DIAG_PLL0_PTATIS_TUNE1 0x01c8 +#define CMN_DIAG_PLL0_PTATIS_TUNE2 0x01c9 +#define CMN_DIAG_HSCLK_SEL 0x01e0 +#define CMN_DIAG_PER_CAL_ADJ 0x01ec +#define CMN_DIAG_CAL_CTRL 0x01ed +#define CMN_DIAG_ACYA 0x01ff +#define XCVR_PSM_RCTRL 0x4001 +#define XCVR_PSM_CAL_TMR 0x4002 +#define XCVR_PSM_A0IN_TMR 0x4003 +#define TX_TXCC_CAL_SCLR_MULT_0 0x4047 +#define TX_TXCC_CPOST_MULT_00_0 0x404c +#define XCVR_DIAG_PLLDRC_CTRL 0x40e0 +#define XCVR_DIAG_PLLDRC_CTRL 0x40e0 +#define XCVR_DIAG_HSCLK_SEL 0x40e1 +#define XCVR_DIAG_LANE_FCM_EN_MGN_TMR 0x40f2 +#define TX_PSC_A0 0x4100 +#define TX_PSC_A1 0x4101 +#define TX_PSC_A2 0x4102 +#define TX_PSC_A3 0x4103 +#define TX_RCVDET_EN_TMR 0x4122 +#define TX_RCVDET_ST_TMR 0x4123 +#define TX_DIAG_BGREF_PREDRV_DELAY 0x41e7 +#define TX_DIAG_BGREF_PREDRV_DELAY 0x41e7 +#define TX_DIAG_ACYA_0 0x41ff +#define TX_DIAG_ACYA_1 0x43ff +#define TX_DIAG_ACYA_2 0x45ff +#define TX_DIAG_ACYA_3 0x47ff +#define TX_ANA_CTRL_REG_1 0x5020 +#define TX_ANA_CTRL_REG_2 0x5021 +#define TX_DIG_CTRL_REG_1 0x5023 +#define TX_DIG_CTRL_REG_2 0x5024 +#define TXDA_CYA_AUXDA_CYA 0x5025 +#define TX_ANA_CTRL_REG_3 0x5026 +#define TX_ANA_CTRL_REG_4 0x5027 +#define TX_ANA_CTRL_REG_5 0x5029 +#define RX_PSC_A0 0x8000 +#define RX_PSC_CAL 0x8006 +#define PHY_HDP_MODE_CTRL 0xc008 +#define PHY_HDP_CLK_CTL 0xc009 +#define PHY_PMA_CMN_CTRL1 0xc800 + +/* PHY_PMA_CMN_CTRL1 */ +#define CMA_REF_CLK_SEL_MASK GENMASK(6, 4) +#define CMA_REF_CLK_RCV_EN_MASK BIT(3) +#define CMA_REF_CLK_RCV_EN 1 + +/* PHY_HDP_CLK_CTL */ +#define PLL_DATA_RATE_CLK_DIV_MASK GENMASK(15, 8) +#define PLL_DATA_RATE_CLK_DIV_HBR 0x24 +#define PLL_DATA_RATE_CLK_DIV_HBR2 0x12 +#define PLL_CLK_EN_ACK BIT(3) +#define PLL_CLK_EN BIT(2) +#define PLL_READY BIT(1) +#define PLL_EN BIT(0) + +/* CMN_DIAG_HSCLK_SEL */ +#define HSCLK1_SEL_MASK GENMASK(5, 4) +#define HSCLK0_SEL_MASK GENMASK(1, 0) +#define HSCLK_PLL0_DIV2 1 + +/* XCVR_DIAG_HSCLK_SEL */ +#define HSCLK_SEL_MODE3_MASK GENMASK(13, 12) +#define HSCLK_SEL_MODE3_HSCLK1 1 + +/* XCVR_DIAG_PLLDRC_CTRL */ +#define DPLL_CLK_SEL_MODE3 BIT(14) +#define DPLL_DATA_RATE_DIV_MODE3_MASK GENMASK(13, 12) + +/* PHY_HDP_MODE_CTRL */ +#define POWER_STATE_A3_ACK BIT(7) +#define POWER_STATE_A2_ACK BIT(6) +#define POWER_STATE_A1_ACK BIT(5) +#define POWER_STATE_A0_ACK BIT(4) +#define POWER_STATE_A3 BIT(3) +#define POWER_STATE_A2 BIT(2) +#define POWER_STATE_A1 BIT(1) +#define POWER_STATE_A0 BIT(0) + +#define REF_CLK_27MHZ 27000000 + +enum dp_link_rate { + RATE_1_6 = 162000, + RATE_2_1 = 216000, + RATE_2_4 = 243000, + RATE_2_7 = 270000, + RATE_3_2 = 324000, + RATE_4_3 = 432000, + RATE_5_4 = 540000, + RATE_8_1 = 810000, +}; + +#define MAX_LINK_RATE RATE_5_4 + +struct phy_pll_reg { + u16 val[7]; + u32 addr; +}; + +static const struct phy_pll_reg phy_pll_27m_cfg[] = { + /* 1.62 2.16 2.43 2.7 3.24 4.32 5.4 register address */ + {{ 0x010e, 0x010e, 0x010e, 0x010e, 0x010e, 0x010e, 0x010e }, CMN_PLL0_VCOCAL_INIT_TMR }, + {{ 0x001b, 0x001b, 0x001b, 0x001b, 0x001b, 0x001b, 0x001b }, CMN_PLL0_VCOCAL_ITER_TMR }, + {{ 0x30b9, 0x3087, 0x3096, 0x30b4, 0x30b9, 0x3087, 0x30b4 }, CMN_PLL0_VCOCAL_START }, + {{ 0x0077, 0x009f, 0x00b3, 0x00c7, 0x0077, 0x009f, 0x00c7 }, CMN_PLL0_INTDIV }, + {{ 0xf9da, 0xf7cd, 0xf6c7, 0xf5c1, 0xf9da, 0xf7cd, 0xf5c1 }, CMN_PLL0_FRACDIV }, + {{ 0x001e, 0x0028, 0x002d, 0x0032, 0x001e, 0x0028, 0x0032 }, CMN_PLL0_HIGH_THR }, + {{ 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020 }, CMN_PLL0_DSM_DIAG }, + {{ 0x0000, 0x1000, 0x1000, 0x1000, 0x0000, 0x1000, 0x1000 }, CMN_PLLSM0_USER_DEF_CTRL }, + {{ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 }, CMN_DIAG_PLL0_OVRD }, + {{ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 }, CMN_DIAG_PLL0_FBH_OVRD }, + {{ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 }, CMN_DIAG_PLL0_FBL_OVRD }, + {{ 0x0006, 0x0007, 0x0007, 0x0007, 0x0006, 0x0007, 0x0007 }, CMN_DIAG_PLL0_V2I_TUNE }, + {{ 0x0043, 0x0043, 0x0043, 0x0042, 0x0043, 0x0043, 0x0042 }, CMN_DIAG_PLL0_CP_TUNE }, + {{ 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008 }, CMN_DIAG_PLL0_LF_PROG }, + {{ 0x0100, 0x0001, 0x0001, 0x0001, 0x0100, 0x0001, 0x0001 }, CMN_DIAG_PLL0_PTATIS_TUNE1 }, + {{ 0x0007, 0x0001, 0x0001, 0x0001, 0x0007, 0x0001, 0x0001 }, CMN_DIAG_PLL0_PTATIS_TUNE2 }, + {{ 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020 }, CMN_DIAG_PLL0_TEST_MODE}, + {{ 0x0016, 0x0016, 0x0016, 0x0016, 0x0016, 0x0016, 0x0016 }, CMN_PSM_CLK_CTRL } +}; + +struct cdns_hdptx_dp_phy { + void __iomem *regs; /* DPTX registers base */ + struct device *dev; + struct phy *phy; + struct mutex mbox_mutex; /* mutex to protect mailbox */ + struct clk *ref_clk, *apb_clk; + u32 ref_clk_rate; + u32 num_lanes; + u32 link_rate; + bool power_up; +}; + +static int cdns_phy_reg_write(struct cdns_hdptx_dp_phy *cdns_phy, u32 addr, u32 val) +{ + return cdns_mhdp_reg_write(cdns_phy, ADDR_PHY_AFE + (addr << 2), val); +} + +static u32 cdns_phy_reg_read(struct cdns_hdptx_dp_phy *cdns_phy, u32 addr) +{ + u32 reg32; + + cdns_mhdp_reg_read(cdns_phy, ADDR_PHY_AFE + (addr << 2), ®32); + return reg32; +} + +static int link_rate_index(u32 rate) +{ + switch (rate) { + case RATE_1_6: + return 0; + case RATE_2_1: + return 1; + case RATE_2_4: + return 2; + case RATE_2_7: + return 3; + case RATE_3_2: + return 4; + case RATE_4_3: + return 5; + case RATE_5_4: + return 6; + default: + return -1; + } +} + +static int hdptx_dp_clk_enable(struct cdns_hdptx_dp_phy *cdns_phy) +{ + struct device *dev = cdns_phy->dev; + u32 ref_clk_rate; + int ret; + + cdns_phy->ref_clk = devm_clk_get(dev, "ref"); + if (IS_ERR(cdns_phy->ref_clk)) { + dev_err(dev, "phy ref clock not found\n"); + return PTR_ERR(cdns_phy->ref_clk); + } + + cdns_phy->apb_clk = devm_clk_get(dev, "apb"); + if (IS_ERR(cdns_phy->apb_clk)) { + dev_err(dev, "phy apb clock not found\n"); + return PTR_ERR(cdns_phy->apb_clk); + } + + ret = clk_prepare_enable(cdns_phy->ref_clk); + if (ret) { + dev_err(cdns_phy->dev, "Failed to prepare ref clock\n"); + return ret; + } + + ref_clk_rate = clk_get_rate(cdns_phy->ref_clk); + if (!ref_clk_rate) { + dev_err(cdns_phy->dev, "Failed to get ref clock rate\n"); + goto err_ref_clk; + } + + if (ref_clk_rate == REF_CLK_27MHZ) { + cdns_phy->ref_clk_rate = ref_clk_rate; + } else { + dev_err(cdns_phy->dev, "Not support Ref Clock Rate(%dHz)\n", ref_clk_rate); + goto err_ref_clk; + } + + ret = clk_prepare_enable(cdns_phy->apb_clk); + if (ret) { + dev_err(cdns_phy->dev, "Failed to prepare apb clock\n"); + goto err_ref_clk; + } + + return 0; + +err_ref_clk: + clk_disable_unprepare(cdns_phy->ref_clk); + return -EINVAL; +} + +static void hdptx_dp_clk_disable(struct cdns_hdptx_dp_phy *cdns_phy) +{ + clk_disable_unprepare(cdns_phy->ref_clk); + clk_disable_unprepare(cdns_phy->apb_clk); +} + +static void hdptx_dp_aux_cfg(struct cdns_hdptx_dp_phy *cdns_phy) +{ + /* Power up Aux */ + cdns_phy_reg_write(cdns_phy, TXDA_CYA_AUXDA_CYA, 1); + + cdns_phy_reg_write(cdns_phy, TX_DIG_CTRL_REG_1, 0x3); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_DIG_CTRL_REG_2, 36); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x0100); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x0300); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_3, 0x0000); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0x2008); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0x2018); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0xa018); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x030c); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_5, 0x0000); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_4, 0x1001); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0xa098); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0xa198); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x030d); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x030f); +} + +/* PMA common configuration for 27MHz */ +static void hdptx_dp_phy_pma_cmn_cfg_27mhz(struct cdns_hdptx_dp_phy *cdns_phy) +{ + u32 num_lanes = cdns_phy->num_lanes; + u16 val; + int k; + + /* Enable PMA input ref clk(CMN_REF_CLK_RCV_EN) */ + val = cdns_phy_reg_read(cdns_phy, PHY_PMA_CMN_CTRL1); + val &= ~CMA_REF_CLK_RCV_EN_MASK; + val |= FIELD_PREP(CMA_REF_CLK_RCV_EN_MASK, CMA_REF_CLK_RCV_EN); + cdns_phy_reg_write(cdns_phy, PHY_PMA_CMN_CTRL1, val); + + /* Startup state machine registers */ + cdns_phy_reg_write(cdns_phy, CMN_SSM_BIAS_TMR, 0x0087); + cdns_phy_reg_write(cdns_phy, CMN_PLLSM0_PLLEN_TMR, 0x001b); + cdns_phy_reg_write(cdns_phy, CMN_PLLSM0_PLLPRE_TMR, 0x0036); + cdns_phy_reg_write(cdns_phy, CMN_PLLSM0_PLLVREF_TMR, 0x001b); + cdns_phy_reg_write(cdns_phy, CMN_PLLSM0_PLLLOCK_TMR, 0x006c); + + /* Current calibration registers */ + cdns_phy_reg_write(cdns_phy, CMN_ICAL_INIT_TMR, 0x0044); + cdns_phy_reg_write(cdns_phy, CMN_ICAL_ITER_TMR, 0x0006); + cdns_phy_reg_write(cdns_phy, CMN_ICAL_ADJ_INIT_TMR, 0x0022); + cdns_phy_reg_write(cdns_phy, CMN_ICAL_ADJ_ITER_TMR, 0x0006); + + /* Resistor calibration registers */ + cdns_phy_reg_write(cdns_phy, CMN_TXPUCAL_INIT_TMR, 0x0022); + cdns_phy_reg_write(cdns_phy, CMN_TXPUCAL_ITER_TMR, 0x0006); + cdns_phy_reg_write(cdns_phy, CMN_TXPU_ADJ_INIT_TMR, 0x0022); + cdns_phy_reg_write(cdns_phy, CMN_TXPU_ADJ_ITER_TMR, 0x0006); + cdns_phy_reg_write(cdns_phy, CMN_TXPDCAL_INIT_TMR, 0x0022); + cdns_phy_reg_write(cdns_phy, CMN_TXPDCAL_ITER_TMR, 0x0006); + cdns_phy_reg_write(cdns_phy, CMN_TXPD_ADJ_INIT_TMR, 0x0022); + cdns_phy_reg_write(cdns_phy, CMN_TXPD_ADJ_ITER_TMR, 0x0006); + cdns_phy_reg_write(cdns_phy, CMN_RXCAL_INIT_TMR, 0x0022); + cdns_phy_reg_write(cdns_phy, CMN_RXCAL_ITER_TMR, 0x0006); + cdns_phy_reg_write(cdns_phy, CMN_RX_ADJ_INIT_TMR, 0x0022); + cdns_phy_reg_write(cdns_phy, CMN_RX_ADJ_ITER_TMR, 0x0006); + + for (k = 0; k < num_lanes; k = k + 1) { + /* Power state machine registers */ + cdns_phy_reg_write(cdns_phy, XCVR_PSM_CAL_TMR | (k << 9), 0x016d); + cdns_phy_reg_write(cdns_phy, XCVR_PSM_A0IN_TMR | (k << 9), 0x016d); + /* Transceiver control and diagnostic registers */ + cdns_phy_reg_write(cdns_phy, XCVR_DIAG_LANE_FCM_EN_MGN_TMR | (k << 9), 0x00a2); + cdns_phy_reg_write(cdns_phy, TX_DIAG_BGREF_PREDRV_DELAY | (k << 9), 0x0097); + /* Transmitter receiver detect registers */ + cdns_phy_reg_write(cdns_phy, TX_RCVDET_EN_TMR | (k << 9), 0x0a8c); + cdns_phy_reg_write(cdns_phy, TX_RCVDET_ST_TMR | (k << 9), 0x0036); + } + + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_0, 1); + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_1, 1); + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_2, 1); + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_3, 1); +} + +static void hdptx_dp_phy_pma_cmn_pll0_27mhz(struct cdns_hdptx_dp_phy *cdns_phy) +{ + u32 num_lanes = cdns_phy->num_lanes; + u32 link_rate = cdns_phy->link_rate; + u16 val; + int index, i, k; + + /* DP PLL data rate 0/1 clock divider value */ + val = cdns_phy_reg_read(cdns_phy, PHY_HDP_CLK_CTL); + val &= ~PLL_DATA_RATE_CLK_DIV_MASK; + if (link_rate <= RATE_2_7) + val |= FIELD_PREP(PLL_DATA_RATE_CLK_DIV_MASK, + PLL_DATA_RATE_CLK_DIV_HBR); + else + val |= FIELD_PREP(PLL_DATA_RATE_CLK_DIV_MASK, + PLL_DATA_RATE_CLK_DIV_HBR2); + cdns_phy_reg_write(cdns_phy, PHY_HDP_CLK_CTL, val); + + /* High speed clock 0/1 div */ + val = cdns_phy_reg_read(cdns_phy, CMN_DIAG_HSCLK_SEL); + val &= ~(HSCLK1_SEL_MASK | HSCLK0_SEL_MASK); + if (link_rate <= RATE_2_7) { + val |= FIELD_PREP(HSCLK1_SEL_MASK, HSCLK_PLL0_DIV2); + val |= FIELD_PREP(HSCLK0_SEL_MASK, HSCLK_PLL0_DIV2); + } + cdns_phy_reg_write(cdns_phy, CMN_DIAG_HSCLK_SEL, val); + + for (k = 0; k < num_lanes; k++) { + val = cdns_phy_reg_read(cdns_phy, (XCVR_DIAG_HSCLK_SEL | (k << 9))); + val &= ~HSCLK_SEL_MODE3_MASK; + if (link_rate <= RATE_2_7) + val |= FIELD_PREP(HSCLK_SEL_MODE3_MASK, HSCLK_SEL_MODE3_HSCLK1); + cdns_phy_reg_write(cdns_phy, (XCVR_DIAG_HSCLK_SEL | (k << 9)), val); + } + + /* DP PHY PLL 27MHz configuration */ + index = link_rate_index(link_rate); + for (i = 0; i < ARRAY_SIZE(phy_pll_27m_cfg); i++) + cdns_phy_reg_write(cdns_phy, phy_pll_27m_cfg[i].addr, + phy_pll_27m_cfg[i].val[index]); + + /* Transceiver control and diagnostic registers */ + for (k = 0; k < num_lanes; k++) { + val = cdns_phy_reg_read(cdns_phy, (XCVR_DIAG_PLLDRC_CTRL | (k << 9))); + val &= ~(DPLL_DATA_RATE_DIV_MODE3_MASK | DPLL_CLK_SEL_MODE3); + if (link_rate <= RATE_2_7) + val |= FIELD_PREP(DPLL_DATA_RATE_DIV_MODE3_MASK, 2); + else + val |= FIELD_PREP(DPLL_DATA_RATE_DIV_MODE3_MASK, 1); + cdns_phy_reg_write(cdns_phy, (XCVR_DIAG_PLLDRC_CTRL | (k << 9)), val); + } + + for (k = 0; k < num_lanes; k = k + 1) { + /* Power state machine registers */ + cdns_phy_reg_write(cdns_phy, (XCVR_PSM_RCTRL | (k << 9)), 0xbefc); + cdns_phy_reg_write(cdns_phy, (TX_PSC_A0 | (k << 9)), 0x6799); + cdns_phy_reg_write(cdns_phy, (TX_PSC_A1 | (k << 9)), 0x6798); + cdns_phy_reg_write(cdns_phy, (TX_PSC_A2 | (k << 9)), 0x0098); + cdns_phy_reg_write(cdns_phy, (TX_PSC_A3 | (k << 9)), 0x0098); + /* Receiver calibration power state definition register */ + val = cdns_phy_reg_read(cdns_phy, RX_PSC_CAL | (k << 9)); + val &= 0xffbb; + cdns_phy_reg_write(cdns_phy, (RX_PSC_CAL | (k << 9)), val); + val = cdns_phy_reg_read(cdns_phy, RX_PSC_A0 | (k << 9)); + val &= 0xffbb; + cdns_phy_reg_write(cdns_phy, (RX_PSC_A0 | (k << 9)), val); + } +} + +static void hdptx_dp_phy_ref_clock_type(struct cdns_hdptx_dp_phy *cdns_phy) +{ + u32 val; + + val = cdns_phy_reg_read(cdns_phy, PHY_PMA_CMN_CTRL1); + val &= ~CMA_REF_CLK_SEL_MASK; + /* + * single ended reference clock (val |= 0x0030); + * differential clock (val |= 0x0000); + * + * for differential clock on the refclk_p and + * refclk_m off chip pins: CMN_DIAG_ACYA[8]=1'b1 + * cdns_phy_reg_write(cdns_phy, CMN_DIAG_ACYA, 0x0100); + */ + val |= FIELD_PREP(CMA_REF_CLK_SEL_MASK, 3); + cdns_phy_reg_write(cdns_phy, PHY_PMA_CMN_CTRL1, val); +} + +static int wait_for_ack(struct cdns_hdptx_dp_phy *cdns_phy, u32 reg, u32 mask, + const char *err_msg) +{ + u32 val, i; + + for (i = 0; i < 10; i++) { + val = cdns_phy_reg_read(cdns_phy, reg); + if (val & mask) + return 0; + msleep(20); + } + + dev_err(cdns_phy->dev, "%s\n", err_msg); + return -1; +} + +static int wait_for_ack_clear(struct cdns_hdptx_dp_phy *cdns_phy, u32 reg, u32 mask, + const char *err_msg) +{ + u32 val, i; + + for (i = 0; i < 10; i++) { + val = cdns_phy_reg_read(cdns_phy, reg); + if (!(val & mask)) + return 0; + msleep(20); + } + + dev_err(cdns_phy->dev, "%s\n", err_msg); + return -1; +} + +static int hdptx_dp_phy_power_up(struct cdns_hdptx_dp_phy *cdns_phy) +{ + u32 val; + + /* Enable HDP PLL’s for high speed clocks */ + val = cdns_phy_reg_read(cdns_phy, PHY_HDP_CLK_CTL); + val |= PLL_EN; + cdns_phy_reg_write(cdns_phy, PHY_HDP_CLK_CTL, val); + if (wait_for_ack(cdns_phy, PHY_HDP_CLK_CTL, PLL_READY, + "Wait PLL Ack failed")) + return -1; + + /* Enable HDP PLL’s data rate and full rate clocks out of PMA. */ + val = cdns_phy_reg_read(cdns_phy, PHY_HDP_CLK_CTL); + val |= PLL_CLK_EN; + cdns_phy_reg_write(cdns_phy, PHY_HDP_CLK_CTL, val); + if (wait_for_ack(cdns_phy, PHY_HDP_CLK_CTL, PLL_CLK_EN_ACK, + "Wait PLL clock enable ACK failed")) + return -1; + + /* Configure PHY in A2 Mode */ + cdns_phy_reg_write(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A2); + if (wait_for_ack(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A2_ACK, + "Wait A2 Ack failed")) + return -1; + + /* Configure PHY in A0 mode (PHY must be in the A0 power + * state in order to transmit data) + */ + cdns_phy_reg_write(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A0); + if (wait_for_ack(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A0_ACK, + "Wait A0 Ack failed")) + return -1; + + cdns_phy->power_up = true; + + return 0; +} + +static void hdptx_dp_phy_power_down(struct cdns_hdptx_dp_phy *cdns_phy) +{ + u16 val; + + if (!cdns_phy->power_up) + return; + + /* Place the PHY lanes in the A3 power state. */ + cdns_phy_reg_write(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A3); + if (wait_for_ack(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A3_ACK, + "Wait A3 Ack failed")) + return; + + /* Disable HDP PLL’s data rate and full rate clocks out of PMA. */ + val = cdns_phy_reg_read(cdns_phy, PHY_HDP_CLK_CTL); + val &= ~PLL_CLK_EN; + cdns_phy_reg_write(cdns_phy, PHY_HDP_CLK_CTL, val); + if (wait_for_ack_clear(cdns_phy, PHY_HDP_CLK_CTL, PLL_CLK_EN_ACK, + "Wait PLL clock Ack clear failed")) + return; + + /* Disable HDP PLL’s for high speed clocks */ + val = cdns_phy_reg_read(cdns_phy, PHY_HDP_CLK_CTL); + val &= ~PLL_EN; + cdns_phy_reg_write(cdns_phy, PHY_HDP_CLK_CTL, val); + if (wait_for_ack_clear(cdns_phy, PHY_HDP_CLK_CTL, PLL_READY, + "Wait PLL Ack clear failed")) + return; +} + +static int cdns_hdptx_dp_phy_on(struct phy *phy) +{ + struct cdns_hdptx_dp_phy *cdns_phy = phy_get_drvdata(phy); + + return hdptx_dp_phy_power_up(cdns_phy); +} + +static int cdns_hdptx_dp_phy_off(struct phy *phy) +{ + struct cdns_hdptx_dp_phy *cdns_phy = phy_get_drvdata(phy); + + hdptx_dp_phy_power_down(cdns_phy); + + return 0; +} + +static int cdns_hdptx_dp_phy_init(struct phy *phy) +{ + struct cdns_hdptx_dp_phy *cdns_phy = phy_get_drvdata(phy); + int ret; + + hdptx_dp_phy_ref_clock_type(cdns_phy); + + /* PHY power up */ + ret = hdptx_dp_phy_power_up(cdns_phy); + if (ret < 0) + return ret; + + hdptx_dp_aux_cfg(cdns_phy); + + return ret; +} + +static int cdns_hdptx_dp_configure(struct phy *phy, + union phy_configure_opts *opts) +{ + struct cdns_hdptx_dp_phy *cdns_phy = phy_get_drvdata(phy); + int ret; + + cdns_phy->link_rate = opts->dp.link_rate; + cdns_phy->num_lanes = opts->dp.lanes; + + if (cdns_phy->link_rate > MAX_LINK_RATE) { + dev_err(cdns_phy->dev, "Link Rate(%d) Not supported\n", cdns_phy->link_rate); + return false; + } + + /* Disable phy clock if PHY in power up state */ + hdptx_dp_phy_power_down(cdns_phy); + + if (cdns_phy->ref_clk_rate == REF_CLK_27MHZ) { + hdptx_dp_phy_pma_cmn_cfg_27mhz(cdns_phy); + hdptx_dp_phy_pma_cmn_pll0_27mhz(cdns_phy); + } else { + dev_err(cdns_phy->dev, "Not support ref clock rate\n"); + } + + /* PHY power up */ + ret = hdptx_dp_phy_power_up(cdns_phy); + + return ret; +} + +static const struct phy_ops cdns_hdptx_dp_phy_ops = { + .init = cdns_hdptx_dp_phy_init, + .configure = cdns_hdptx_dp_configure, + .power_on = cdns_hdptx_dp_phy_on, + .power_off = cdns_hdptx_dp_phy_off, + .owner = THIS_MODULE, +}; + +static int cdns_hdptx_dp_phy_probe(struct platform_device *pdev) +{ + struct cdns_hdptx_dp_phy *cdns_phy; + struct device *dev = &pdev->dev; + struct device_node *node = dev->of_node; + struct phy_provider *phy_provider; + struct resource *res; + struct phy *phy; + int ret; + + cdns_phy = devm_kzalloc(dev, sizeof(*cdns_phy), GFP_KERNEL); + if (!cdns_phy) + return -ENOMEM; + + dev_set_drvdata(dev, cdns_phy); + cdns_phy->dev = dev; + mutex_init(&cdns_phy->mbox_mutex); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + cdns_phy->regs = devm_ioremap(dev, res->start, resource_size(res)); + if (IS_ERR(cdns_phy->regs)) + return PTR_ERR(cdns_phy->regs); + + phy = devm_phy_create(dev, node, &cdns_hdptx_dp_phy_ops); + if (IS_ERR(phy)) + return PTR_ERR(phy); + + phy->attrs.mode = PHY_MODE_DP; + cdns_phy->phy = phy; + phy_set_drvdata(phy, cdns_phy); + + ret = hdptx_dp_clk_enable(cdns_phy); + if (ret) { + dev_err(dev, "Init clk fail\n"); + return -EINVAL; + } + + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + if (IS_ERR(phy_provider)) { + ret = PTR_ERR(phy_provider); + goto clk_disable; + } + + return 0; + +clk_disable: + hdptx_dp_clk_disable(cdns_phy); + + return -EINVAL; +} + +static int cdns_hdptx_dp_phy_remove(struct platform_device *pdev) +{ + struct cdns_hdptx_dp_phy *cdns_phy = platform_get_drvdata(pdev); + + hdptx_dp_clk_disable(cdns_phy); + + return 0; +} + +static const struct of_device_id cdns_hdptx_dp_phy_of_match[] = { + {.compatible = "fsl,imx8mq-dp-phy" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, cdns_hdptx_dp_phy_of_match); + +static struct platform_driver cdns_hdptx_dp_phy_driver = { + .probe = cdns_hdptx_dp_phy_probe, + .remove = cdns_hdptx_dp_phy_remove, + .driver = { + .name = "cdns-hdptx-dp-phy", + .of_match_table = cdns_hdptx_dp_phy_of_match, + } +}; +module_platform_driver(cdns_hdptx_dp_phy_driver); + +MODULE_AUTHOR("Sandor Yu "); +MODULE_DESCRIPTION("Cadence HDP-TX DisplayPort PHY driver"); +MODULE_LICENSE("GPL"); -- 2.34.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on 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linux-phy@lists.infradead.org Subject: [PATCH v8 6/7] phy: freescale: Add DisplayPort PHY driver for i.MX8MQ Date: Tue, 8 Aug 2023 16:32:42 +0800 Message-Id: <20230808083243.3113192-7-Sandor.yu@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230808083243.3113192-1-Sandor.yu@nxp.com> References: <20230808083243.3113192-1-Sandor.yu@nxp.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-ClientProxiedBy: SI1PR02CA0010.apcprd02.prod.outlook.com (2603:1096:4:1f7::17) To PAXPR04MB9448.eurprd04.prod.outlook.com (2603:10a6:102:2b1::21) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PAXPR04MB9448:EE_|VI1PR04MB7198:EE_ X-MS-Office365-Filtering-Correlation-Id: e8462730-4edd-4b05-e5b6-08db97ea3e68 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: oliver.brown@nxp.com, alexander.stein@ew.tq-group.com, Sandor.yu@nxp.com, linux-imx@nxp.com, kernel@pengutronix.de, sam@ravnborg.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add Cadence HDP-TX DisplayPort PHY driver for i.MX8MQ Cadence HDP-TX PHY could be put in either DP mode or HDMI mode base on the configuration chosen. DisplayPort PHY mode is configurated in the driver. Signed-off-by: Sandor Yu --- drivers/phy/freescale/Kconfig | 9 + drivers/phy/freescale/Makefile | 1 + drivers/phy/freescale/phy-fsl-imx8mq-dp.c | 714 ++++++++++++++++++++++ 3 files changed, 724 insertions(+) create mode 100644 drivers/phy/freescale/phy-fsl-imx8mq-dp.c diff --git a/drivers/phy/freescale/Kconfig b/drivers/phy/freescale/Kconfig index 853958fb2c06..2999ba1e57d0 100644 --- a/drivers/phy/freescale/Kconfig +++ b/drivers/phy/freescale/Kconfig @@ -35,6 +35,15 @@ config PHY_FSL_IMX8M_PCIE Enable this to add support for the PCIE PHY as found on i.MX8M family of SOCs. +config PHY_FSL_IMX8MQ_DP_PHY + tristate "Freescale i.MX8MQ DP PHY support" + depends on OF && HAS_IOMEM + depends on COMMON_CLK + select GENERIC_PHY + help + Enable this to support the Cadence HDPTX DP PHY driver + on i.MX8MQ SOC. + endif config PHY_FSL_LYNX_28G diff --git a/drivers/phy/freescale/Makefile b/drivers/phy/freescale/Makefile index cedb328bc4d2..915a429d9fbc 100644 --- a/drivers/phy/freescale/Makefile +++ b/drivers/phy/freescale/Makefile @@ -4,3 +4,4 @@ obj-$(CONFIG_PHY_MIXEL_LVDS_PHY) += phy-fsl-imx8qm-lvds-phy.o obj-$(CONFIG_PHY_MIXEL_MIPI_DPHY) += phy-fsl-imx8-mipi-dphy.o obj-$(CONFIG_PHY_FSL_IMX8M_PCIE) += phy-fsl-imx8m-pcie.o obj-$(CONFIG_PHY_FSL_LYNX_28G) += phy-fsl-lynx-28g.o +obj-$(CONFIG_PHY_FSL_IMX8MQ_DP_PHY) += phy-fsl-imx8mq-dp.o diff --git a/drivers/phy/freescale/phy-fsl-imx8mq-dp.c b/drivers/phy/freescale/phy-fsl-imx8mq-dp.c new file mode 100644 index 000000000000..b1f45c0b27b5 --- /dev/null +++ b/drivers/phy/freescale/phy-fsl-imx8mq-dp.c @@ -0,0 +1,714 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Cadence HDP-TX Display Port Interface (DP) PHY driver + * + * Copyright (C) 2022, 2023 NXP Semiconductor, Inc. + */ +#include +#include +#include +#include +#include +#include +#include + +#include + +#define ADDR_PHY_AFE 0x80000 + +/* PHY registers */ +#define CMN_SSM_BIAS_TMR 0x0022 +#define CMN_PLLSM0_PLLEN_TMR 0x0029 +#define CMN_PLLSM0_PLLPRE_TMR 0x002a +#define CMN_PLLSM0_PLLVREF_TMR 0x002b +#define CMN_PLLSM0_PLLLOCK_TMR 0x002c +#define CMN_PLLSM0_USER_DEF_CTRL 0x002f +#define CMN_PSM_CLK_CTRL 0x0061 +#define CMN_PLL0_VCOCAL_START 0x0081 +#define CMN_PLL0_VCOCAL_INIT_TMR 0x0084 +#define CMN_PLL0_VCOCAL_ITER_TMR 0x0085 +#define CMN_PLL0_INTDIV 0x0094 +#define CMN_PLL0_FRACDIV 0x0095 +#define CMN_PLL0_HIGH_THR 0x0096 +#define CMN_PLL0_DSM_DIAG 0x0097 +#define CMN_PLL0_SS_CTRL2 0x0099 +#define CMN_ICAL_INIT_TMR 0x00c4 +#define CMN_ICAL_ITER_TMR 0x00c5 +#define CMN_RXCAL_INIT_TMR 0x00d4 +#define CMN_RXCAL_ITER_TMR 0x00d5 +#define CMN_TXPUCAL_INIT_TMR 0x00e4 +#define CMN_TXPUCAL_ITER_TMR 0x00e5 +#define CMN_TXPDCAL_INIT_TMR 0x00f4 +#define CMN_TXPDCAL_ITER_TMR 0x00f5 +#define CMN_ICAL_ADJ_INIT_TMR 0x0102 +#define CMN_ICAL_ADJ_ITER_TMR 0x0103 +#define CMN_RX_ADJ_INIT_TMR 0x0106 +#define CMN_RX_ADJ_ITER_TMR 0x0107 +#define CMN_TXPU_ADJ_INIT_TMR 0x010a +#define CMN_TXPU_ADJ_ITER_TMR 0x010b +#define CMN_TXPD_ADJ_INIT_TMR 0x010e +#define CMN_TXPD_ADJ_ITER_TMR 0x010f +#define CMN_DIAG_PLL0_FBH_OVRD 0x01c0 +#define CMN_DIAG_PLL0_FBL_OVRD 0x01c1 +#define CMN_DIAG_PLL0_OVRD 0x01c2 +#define CMN_DIAG_PLL0_TEST_MODE 0x01c4 +#define CMN_DIAG_PLL0_V2I_TUNE 0x01c5 +#define CMN_DIAG_PLL0_CP_TUNE 0x01c6 +#define CMN_DIAG_PLL0_LF_PROG 0x01c7 +#define CMN_DIAG_PLL0_PTATIS_TUNE1 0x01c8 +#define CMN_DIAG_PLL0_PTATIS_TUNE2 0x01c9 +#define CMN_DIAG_HSCLK_SEL 0x01e0 +#define CMN_DIAG_PER_CAL_ADJ 0x01ec +#define CMN_DIAG_CAL_CTRL 0x01ed +#define CMN_DIAG_ACYA 0x01ff +#define XCVR_PSM_RCTRL 0x4001 +#define XCVR_PSM_CAL_TMR 0x4002 +#define XCVR_PSM_A0IN_TMR 0x4003 +#define TX_TXCC_CAL_SCLR_MULT_0 0x4047 +#define TX_TXCC_CPOST_MULT_00_0 0x404c +#define XCVR_DIAG_PLLDRC_CTRL 0x40e0 +#define XCVR_DIAG_PLLDRC_CTRL 0x40e0 +#define XCVR_DIAG_HSCLK_SEL 0x40e1 +#define XCVR_DIAG_LANE_FCM_EN_MGN_TMR 0x40f2 +#define TX_PSC_A0 0x4100 +#define TX_PSC_A1 0x4101 +#define TX_PSC_A2 0x4102 +#define TX_PSC_A3 0x4103 +#define TX_RCVDET_EN_TMR 0x4122 +#define TX_RCVDET_ST_TMR 0x4123 +#define TX_DIAG_BGREF_PREDRV_DELAY 0x41e7 +#define TX_DIAG_BGREF_PREDRV_DELAY 0x41e7 +#define TX_DIAG_ACYA_0 0x41ff +#define TX_DIAG_ACYA_1 0x43ff +#define TX_DIAG_ACYA_2 0x45ff +#define TX_DIAG_ACYA_3 0x47ff +#define TX_ANA_CTRL_REG_1 0x5020 +#define TX_ANA_CTRL_REG_2 0x5021 +#define TX_DIG_CTRL_REG_1 0x5023 +#define TX_DIG_CTRL_REG_2 0x5024 +#define TXDA_CYA_AUXDA_CYA 0x5025 +#define TX_ANA_CTRL_REG_3 0x5026 +#define TX_ANA_CTRL_REG_4 0x5027 +#define TX_ANA_CTRL_REG_5 0x5029 +#define RX_PSC_A0 0x8000 +#define RX_PSC_CAL 0x8006 +#define PHY_HDP_MODE_CTRL 0xc008 +#define PHY_HDP_CLK_CTL 0xc009 +#define PHY_PMA_CMN_CTRL1 0xc800 + +/* PHY_PMA_CMN_CTRL1 */ +#define CMA_REF_CLK_SEL_MASK GENMASK(6, 4) +#define CMA_REF_CLK_RCV_EN_MASK BIT(3) +#define CMA_REF_CLK_RCV_EN 1 + +/* PHY_HDP_CLK_CTL */ +#define PLL_DATA_RATE_CLK_DIV_MASK GENMASK(15, 8) +#define PLL_DATA_RATE_CLK_DIV_HBR 0x24 +#define PLL_DATA_RATE_CLK_DIV_HBR2 0x12 +#define PLL_CLK_EN_ACK BIT(3) +#define PLL_CLK_EN BIT(2) +#define PLL_READY BIT(1) +#define PLL_EN BIT(0) + +/* CMN_DIAG_HSCLK_SEL */ +#define HSCLK1_SEL_MASK GENMASK(5, 4) +#define HSCLK0_SEL_MASK GENMASK(1, 0) +#define HSCLK_PLL0_DIV2 1 + +/* XCVR_DIAG_HSCLK_SEL */ +#define HSCLK_SEL_MODE3_MASK GENMASK(13, 12) +#define HSCLK_SEL_MODE3_HSCLK1 1 + +/* XCVR_DIAG_PLLDRC_CTRL */ +#define DPLL_CLK_SEL_MODE3 BIT(14) +#define DPLL_DATA_RATE_DIV_MODE3_MASK GENMASK(13, 12) + +/* PHY_HDP_MODE_CTRL */ +#define POWER_STATE_A3_ACK BIT(7) +#define POWER_STATE_A2_ACK BIT(6) +#define POWER_STATE_A1_ACK BIT(5) +#define POWER_STATE_A0_ACK BIT(4) +#define POWER_STATE_A3 BIT(3) +#define POWER_STATE_A2 BIT(2) +#define POWER_STATE_A1 BIT(1) +#define POWER_STATE_A0 BIT(0) + +#define REF_CLK_27MHZ 27000000 + +enum dp_link_rate { + RATE_1_6 = 162000, + RATE_2_1 = 216000, + RATE_2_4 = 243000, + RATE_2_7 = 270000, + RATE_3_2 = 324000, + RATE_4_3 = 432000, + RATE_5_4 = 540000, + RATE_8_1 = 810000, +}; + +#define MAX_LINK_RATE RATE_5_4 + +struct phy_pll_reg { + u16 val[7]; + u32 addr; +}; + +static const struct phy_pll_reg phy_pll_27m_cfg[] = { + /* 1.62 2.16 2.43 2.7 3.24 4.32 5.4 register address */ + {{ 0x010e, 0x010e, 0x010e, 0x010e, 0x010e, 0x010e, 0x010e }, CMN_PLL0_VCOCAL_INIT_TMR }, + {{ 0x001b, 0x001b, 0x001b, 0x001b, 0x001b, 0x001b, 0x001b }, CMN_PLL0_VCOCAL_ITER_TMR }, + {{ 0x30b9, 0x3087, 0x3096, 0x30b4, 0x30b9, 0x3087, 0x30b4 }, CMN_PLL0_VCOCAL_START }, + {{ 0x0077, 0x009f, 0x00b3, 0x00c7, 0x0077, 0x009f, 0x00c7 }, CMN_PLL0_INTDIV }, + {{ 0xf9da, 0xf7cd, 0xf6c7, 0xf5c1, 0xf9da, 0xf7cd, 0xf5c1 }, CMN_PLL0_FRACDIV }, + {{ 0x001e, 0x0028, 0x002d, 0x0032, 0x001e, 0x0028, 0x0032 }, CMN_PLL0_HIGH_THR }, + {{ 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020 }, CMN_PLL0_DSM_DIAG }, + {{ 0x0000, 0x1000, 0x1000, 0x1000, 0x0000, 0x1000, 0x1000 }, CMN_PLLSM0_USER_DEF_CTRL }, + {{ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 }, CMN_DIAG_PLL0_OVRD }, + {{ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 }, CMN_DIAG_PLL0_FBH_OVRD }, + {{ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 }, CMN_DIAG_PLL0_FBL_OVRD }, + {{ 0x0006, 0x0007, 0x0007, 0x0007, 0x0006, 0x0007, 0x0007 }, CMN_DIAG_PLL0_V2I_TUNE }, + {{ 0x0043, 0x0043, 0x0043, 0x0042, 0x0043, 0x0043, 0x0042 }, CMN_DIAG_PLL0_CP_TUNE }, + {{ 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008 }, CMN_DIAG_PLL0_LF_PROG }, + {{ 0x0100, 0x0001, 0x0001, 0x0001, 0x0100, 0x0001, 0x0001 }, CMN_DIAG_PLL0_PTATIS_TUNE1 }, + {{ 0x0007, 0x0001, 0x0001, 0x0001, 0x0007, 0x0001, 0x0001 }, CMN_DIAG_PLL0_PTATIS_TUNE2 }, + {{ 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020 }, CMN_DIAG_PLL0_TEST_MODE}, + {{ 0x0016, 0x0016, 0x0016, 0x0016, 0x0016, 0x0016, 0x0016 }, CMN_PSM_CLK_CTRL } +}; + +struct cdns_hdptx_dp_phy { + void __iomem *regs; /* DPTX registers base */ + struct device *dev; + struct phy *phy; + struct mutex mbox_mutex; /* mutex to protect mailbox */ + struct clk *ref_clk, *apb_clk; + u32 ref_clk_rate; + u32 num_lanes; + u32 link_rate; + bool power_up; +}; + +static int cdns_phy_reg_write(struct cdns_hdptx_dp_phy *cdns_phy, u32 addr, u32 val) +{ + return cdns_mhdp_reg_write(cdns_phy, ADDR_PHY_AFE + (addr << 2), val); +} + +static u32 cdns_phy_reg_read(struct cdns_hdptx_dp_phy *cdns_phy, u32 addr) +{ + u32 reg32; + + cdns_mhdp_reg_read(cdns_phy, ADDR_PHY_AFE + (addr << 2), ®32); + return reg32; +} + +static int link_rate_index(u32 rate) +{ + switch (rate) { + case RATE_1_6: + return 0; + case RATE_2_1: + return 1; + case RATE_2_4: + return 2; + case RATE_2_7: + return 3; + case RATE_3_2: + return 4; + case RATE_4_3: + return 5; + case RATE_5_4: + return 6; + default: + return -1; + } +} + +static int hdptx_dp_clk_enable(struct cdns_hdptx_dp_phy *cdns_phy) +{ + struct device *dev = cdns_phy->dev; + u32 ref_clk_rate; + int ret; + + cdns_phy->ref_clk = devm_clk_get(dev, "ref"); + if (IS_ERR(cdns_phy->ref_clk)) { + dev_err(dev, "phy ref clock not found\n"); + return PTR_ERR(cdns_phy->ref_clk); + } + + cdns_phy->apb_clk = devm_clk_get(dev, "apb"); + if (IS_ERR(cdns_phy->apb_clk)) { + dev_err(dev, "phy apb clock not found\n"); + return PTR_ERR(cdns_phy->apb_clk); + } + + ret = clk_prepare_enable(cdns_phy->ref_clk); + if (ret) { + dev_err(cdns_phy->dev, "Failed to prepare ref clock\n"); + return ret; + } + + ref_clk_rate = clk_get_rate(cdns_phy->ref_clk); + if (!ref_clk_rate) { + dev_err(cdns_phy->dev, "Failed to get ref clock rate\n"); + goto err_ref_clk; + } + + if (ref_clk_rate == REF_CLK_27MHZ) { + cdns_phy->ref_clk_rate = ref_clk_rate; + } else { + dev_err(cdns_phy->dev, "Not support Ref Clock Rate(%dHz)\n", ref_clk_rate); + goto err_ref_clk; + } + + ret = clk_prepare_enable(cdns_phy->apb_clk); + if (ret) { + dev_err(cdns_phy->dev, "Failed to prepare apb clock\n"); + goto err_ref_clk; + } + + return 0; + +err_ref_clk: + clk_disable_unprepare(cdns_phy->ref_clk); + return -EINVAL; +} + +static void hdptx_dp_clk_disable(struct cdns_hdptx_dp_phy *cdns_phy) +{ + clk_disable_unprepare(cdns_phy->ref_clk); + clk_disable_unprepare(cdns_phy->apb_clk); +} + +static void hdptx_dp_aux_cfg(struct cdns_hdptx_dp_phy *cdns_phy) +{ + /* Power up Aux */ + cdns_phy_reg_write(cdns_phy, TXDA_CYA_AUXDA_CYA, 1); + + cdns_phy_reg_write(cdns_phy, TX_DIG_CTRL_REG_1, 0x3); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_DIG_CTRL_REG_2, 36); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x0100); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x0300); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_3, 0x0000); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0x2008); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0x2018); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0xa018); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x030c); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_5, 0x0000); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_4, 0x1001); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0xa098); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0xa198); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x030d); + ndelay(150); + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x030f); +} + +/* PMA common configuration for 27MHz */ +static void hdptx_dp_phy_pma_cmn_cfg_27mhz(struct cdns_hdptx_dp_phy *cdns_phy) +{ + u32 num_lanes = cdns_phy->num_lanes; + u16 val; + int k; + + /* Enable PMA input ref clk(CMN_REF_CLK_RCV_EN) */ + val = cdns_phy_reg_read(cdns_phy, PHY_PMA_CMN_CTRL1); + val &= ~CMA_REF_CLK_RCV_EN_MASK; + val |= FIELD_PREP(CMA_REF_CLK_RCV_EN_MASK, CMA_REF_CLK_RCV_EN); + cdns_phy_reg_write(cdns_phy, PHY_PMA_CMN_CTRL1, val); + + /* Startup state machine registers */ + cdns_phy_reg_write(cdns_phy, CMN_SSM_BIAS_TMR, 0x0087); + cdns_phy_reg_write(cdns_phy, CMN_PLLSM0_PLLEN_TMR, 0x001b); + cdns_phy_reg_write(cdns_phy, CMN_PLLSM0_PLLPRE_TMR, 0x0036); + cdns_phy_reg_write(cdns_phy, CMN_PLLSM0_PLLVREF_TMR, 0x001b); + cdns_phy_reg_write(cdns_phy, CMN_PLLSM0_PLLLOCK_TMR, 0x006c); + + /* Current calibration registers */ + cdns_phy_reg_write(cdns_phy, CMN_ICAL_INIT_TMR, 0x0044); + cdns_phy_reg_write(cdns_phy, CMN_ICAL_ITER_TMR, 0x0006); + cdns_phy_reg_write(cdns_phy, CMN_ICAL_ADJ_INIT_TMR, 0x0022); + cdns_phy_reg_write(cdns_phy, CMN_ICAL_ADJ_ITER_TMR, 0x0006); + + /* Resistor calibration registers */ + cdns_phy_reg_write(cdns_phy, CMN_TXPUCAL_INIT_TMR, 0x0022); + cdns_phy_reg_write(cdns_phy, CMN_TXPUCAL_ITER_TMR, 0x0006); + cdns_phy_reg_write(cdns_phy, CMN_TXPU_ADJ_INIT_TMR, 0x0022); + cdns_phy_reg_write(cdns_phy, CMN_TXPU_ADJ_ITER_TMR, 0x0006); + cdns_phy_reg_write(cdns_phy, CMN_TXPDCAL_INIT_TMR, 0x0022); + cdns_phy_reg_write(cdns_phy, CMN_TXPDCAL_ITER_TMR, 0x0006); + cdns_phy_reg_write(cdns_phy, CMN_TXPD_ADJ_INIT_TMR, 0x0022); + cdns_phy_reg_write(cdns_phy, CMN_TXPD_ADJ_ITER_TMR, 0x0006); + cdns_phy_reg_write(cdns_phy, CMN_RXCAL_INIT_TMR, 0x0022); + cdns_phy_reg_write(cdns_phy, CMN_RXCAL_ITER_TMR, 0x0006); + cdns_phy_reg_write(cdns_phy, CMN_RX_ADJ_INIT_TMR, 0x0022); + cdns_phy_reg_write(cdns_phy, CMN_RX_ADJ_ITER_TMR, 0x0006); + + for (k = 0; k < num_lanes; k = k + 1) { + /* Power state machine registers */ + cdns_phy_reg_write(cdns_phy, XCVR_PSM_CAL_TMR | (k << 9), 0x016d); + cdns_phy_reg_write(cdns_phy, XCVR_PSM_A0IN_TMR | (k << 9), 0x016d); + /* Transceiver control and diagnostic registers */ + cdns_phy_reg_write(cdns_phy, XCVR_DIAG_LANE_FCM_EN_MGN_TMR | (k << 9), 0x00a2); + cdns_phy_reg_write(cdns_phy, TX_DIAG_BGREF_PREDRV_DELAY | (k << 9), 0x0097); + /* Transmitter receiver detect registers */ + cdns_phy_reg_write(cdns_phy, TX_RCVDET_EN_TMR | (k << 9), 0x0a8c); + cdns_phy_reg_write(cdns_phy, TX_RCVDET_ST_TMR | (k << 9), 0x0036); + } + + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_0, 1); + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_1, 1); + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_2, 1); + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_3, 1); +} + +static void hdptx_dp_phy_pma_cmn_pll0_27mhz(struct cdns_hdptx_dp_phy *cdns_phy) +{ + u32 num_lanes = cdns_phy->num_lanes; + u32 link_rate = cdns_phy->link_rate; + u16 val; + int index, i, k; + + /* DP PLL data rate 0/1 clock divider value */ + val = cdns_phy_reg_read(cdns_phy, PHY_HDP_CLK_CTL); + val &= ~PLL_DATA_RATE_CLK_DIV_MASK; + if (link_rate <= RATE_2_7) + val |= FIELD_PREP(PLL_DATA_RATE_CLK_DIV_MASK, + PLL_DATA_RATE_CLK_DIV_HBR); + else + val |= FIELD_PREP(PLL_DATA_RATE_CLK_DIV_MASK, + PLL_DATA_RATE_CLK_DIV_HBR2); + cdns_phy_reg_write(cdns_phy, PHY_HDP_CLK_CTL, val); + + /* High speed clock 0/1 div */ + val = cdns_phy_reg_read(cdns_phy, CMN_DIAG_HSCLK_SEL); + val &= ~(HSCLK1_SEL_MASK | HSCLK0_SEL_MASK); + if (link_rate <= RATE_2_7) { + val |= FIELD_PREP(HSCLK1_SEL_MASK, HSCLK_PLL0_DIV2); + val |= FIELD_PREP(HSCLK0_SEL_MASK, HSCLK_PLL0_DIV2); + } + cdns_phy_reg_write(cdns_phy, CMN_DIAG_HSCLK_SEL, val); + + for (k = 0; k < num_lanes; k++) { + val = cdns_phy_reg_read(cdns_phy, (XCVR_DIAG_HSCLK_SEL | (k << 9))); + val &= ~HSCLK_SEL_MODE3_MASK; + if (link_rate <= RATE_2_7) + val |= FIELD_PREP(HSCLK_SEL_MODE3_MASK, HSCLK_SEL_MODE3_HSCLK1); + cdns_phy_reg_write(cdns_phy, (XCVR_DIAG_HSCLK_SEL | (k << 9)), val); + } + + /* DP PHY PLL 27MHz configuration */ + index = link_rate_index(link_rate); + for (i = 0; i < ARRAY_SIZE(phy_pll_27m_cfg); i++) + cdns_phy_reg_write(cdns_phy, phy_pll_27m_cfg[i].addr, + phy_pll_27m_cfg[i].val[index]); + + /* Transceiver control and diagnostic registers */ + for (k = 0; k < num_lanes; k++) { + val = cdns_phy_reg_read(cdns_phy, (XCVR_DIAG_PLLDRC_CTRL | (k << 9))); + val &= ~(DPLL_DATA_RATE_DIV_MODE3_MASK | DPLL_CLK_SEL_MODE3); + if (link_rate <= RATE_2_7) + val |= FIELD_PREP(DPLL_DATA_RATE_DIV_MODE3_MASK, 2); + else + val |= FIELD_PREP(DPLL_DATA_RATE_DIV_MODE3_MASK, 1); + cdns_phy_reg_write(cdns_phy, (XCVR_DIAG_PLLDRC_CTRL | (k << 9)), val); + } + + for (k = 0; k < num_lanes; k = k + 1) { + /* Power state machine registers */ + cdns_phy_reg_write(cdns_phy, (XCVR_PSM_RCTRL | (k << 9)), 0xbefc); + cdns_phy_reg_write(cdns_phy, (TX_PSC_A0 | (k << 9)), 0x6799); + cdns_phy_reg_write(cdns_phy, (TX_PSC_A1 | (k << 9)), 0x6798); + cdns_phy_reg_write(cdns_phy, (TX_PSC_A2 | (k << 9)), 0x0098); + cdns_phy_reg_write(cdns_phy, (TX_PSC_A3 | (k << 9)), 0x0098); + /* Receiver calibration power state definition register */ + val = cdns_phy_reg_read(cdns_phy, RX_PSC_CAL | (k << 9)); + val &= 0xffbb; + cdns_phy_reg_write(cdns_phy, (RX_PSC_CAL | (k << 9)), val); + val = cdns_phy_reg_read(cdns_phy, RX_PSC_A0 | (k << 9)); + val &= 0xffbb; + cdns_phy_reg_write(cdns_phy, (RX_PSC_A0 | (k << 9)), val); + } +} + +static void hdptx_dp_phy_ref_clock_type(struct cdns_hdptx_dp_phy *cdns_phy) +{ + u32 val; + + val = cdns_phy_reg_read(cdns_phy, PHY_PMA_CMN_CTRL1); + val &= ~CMA_REF_CLK_SEL_MASK; + /* + * single ended reference clock (val |= 0x0030); + * differential clock (val |= 0x0000); + * + * for differential clock on the refclk_p and + * refclk_m off chip pins: CMN_DIAG_ACYA[8]=1'b1 + * cdns_phy_reg_write(cdns_phy, CMN_DIAG_ACYA, 0x0100); + */ + val |= FIELD_PREP(CMA_REF_CLK_SEL_MASK, 3); + cdns_phy_reg_write(cdns_phy, PHY_PMA_CMN_CTRL1, val); +} + +static int wait_for_ack(struct cdns_hdptx_dp_phy *cdns_phy, u32 reg, u32 mask, + const char *err_msg) +{ + u32 val, i; + + for (i = 0; i < 10; i++) { + val = cdns_phy_reg_read(cdns_phy, reg); + if (val & mask) + return 0; + msleep(20); + } + + dev_err(cdns_phy->dev, "%s\n", err_msg); + return -1; +} + +static int wait_for_ack_clear(struct cdns_hdptx_dp_phy *cdns_phy, u32 reg, u32 mask, + const char *err_msg) +{ + u32 val, i; + + for (i = 0; i < 10; i++) { + val = cdns_phy_reg_read(cdns_phy, reg); + if (!(val & mask)) + return 0; + msleep(20); + } + + dev_err(cdns_phy->dev, "%s\n", err_msg); + return -1; +} + +static int hdptx_dp_phy_power_up(struct cdns_hdptx_dp_phy *cdns_phy) +{ + u32 val; + + /* Enable HDP PLL’s for high speed clocks */ + val = cdns_phy_reg_read(cdns_phy, PHY_HDP_CLK_CTL); + val |= PLL_EN; + cdns_phy_reg_write(cdns_phy, PHY_HDP_CLK_CTL, val); + if (wait_for_ack(cdns_phy, PHY_HDP_CLK_CTL, PLL_READY, + "Wait PLL Ack failed")) + return -1; + + /* Enable HDP PLL’s data rate and full rate clocks out of PMA. */ + val = cdns_phy_reg_read(cdns_phy, PHY_HDP_CLK_CTL); + val |= PLL_CLK_EN; + cdns_phy_reg_write(cdns_phy, PHY_HDP_CLK_CTL, val); + if (wait_for_ack(cdns_phy, PHY_HDP_CLK_CTL, PLL_CLK_EN_ACK, + "Wait PLL clock enable ACK failed")) + return -1; + + /* Configure PHY in A2 Mode */ + cdns_phy_reg_write(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A2); + if (wait_for_ack(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A2_ACK, + "Wait A2 Ack failed")) + return -1; + + /* Configure PHY in A0 mode (PHY must be in the A0 power + * state in order to transmit data) + */ + cdns_phy_reg_write(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A0); + if (wait_for_ack(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A0_ACK, + "Wait A0 Ack failed")) + return -1; + + cdns_phy->power_up = true; + + return 0; +} + +static void hdptx_dp_phy_power_down(struct cdns_hdptx_dp_phy *cdns_phy) +{ + u16 val; + + if (!cdns_phy->power_up) + return; + + /* Place the PHY lanes in the A3 power state. */ + cdns_phy_reg_write(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A3); + if (wait_for_ack(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A3_ACK, + "Wait A3 Ack failed")) + return; + + /* Disable HDP PLL’s data rate and full rate clocks out of PMA. */ + val = cdns_phy_reg_read(cdns_phy, PHY_HDP_CLK_CTL); + val &= ~PLL_CLK_EN; + cdns_phy_reg_write(cdns_phy, PHY_HDP_CLK_CTL, val); + if (wait_for_ack_clear(cdns_phy, PHY_HDP_CLK_CTL, PLL_CLK_EN_ACK, + "Wait PLL clock Ack clear failed")) + return; + + /* Disable HDP PLL’s for high speed clocks */ + val = cdns_phy_reg_read(cdns_phy, PHY_HDP_CLK_CTL); + val &= ~PLL_EN; + cdns_phy_reg_write(cdns_phy, PHY_HDP_CLK_CTL, val); + if (wait_for_ack_clear(cdns_phy, PHY_HDP_CLK_CTL, PLL_READY, + "Wait PLL Ack clear failed")) + return; +} + +static int cdns_hdptx_dp_phy_on(struct phy *phy) +{ + struct cdns_hdptx_dp_phy *cdns_phy = phy_get_drvdata(phy); + + return hdptx_dp_phy_power_up(cdns_phy); +} + +static int cdns_hdptx_dp_phy_off(struct phy *phy) +{ + struct cdns_hdptx_dp_phy *cdns_phy = phy_get_drvdata(phy); + + hdptx_dp_phy_power_down(cdns_phy); + + return 0; +} + +static int cdns_hdptx_dp_phy_init(struct phy *phy) +{ + struct cdns_hdptx_dp_phy *cdns_phy = phy_get_drvdata(phy); + int ret; + + hdptx_dp_phy_ref_clock_type(cdns_phy); + + /* PHY power up */ + ret = hdptx_dp_phy_power_up(cdns_phy); + if (ret < 0) + return ret; + + hdptx_dp_aux_cfg(cdns_phy); + + return ret; +} + +static int cdns_hdptx_dp_configure(struct phy *phy, + union phy_configure_opts *opts) +{ + struct cdns_hdptx_dp_phy *cdns_phy = phy_get_drvdata(phy); + int ret; + + cdns_phy->link_rate = opts->dp.link_rate; + cdns_phy->num_lanes = opts->dp.lanes; + + if (cdns_phy->link_rate > MAX_LINK_RATE) { + dev_err(cdns_phy->dev, "Link Rate(%d) Not supported\n", cdns_phy->link_rate); + return false; + } + + /* Disable phy clock if PHY in power up state */ + hdptx_dp_phy_power_down(cdns_phy); + + if (cdns_phy->ref_clk_rate == REF_CLK_27MHZ) { + hdptx_dp_phy_pma_cmn_cfg_27mhz(cdns_phy); + hdptx_dp_phy_pma_cmn_pll0_27mhz(cdns_phy); + } else { + dev_err(cdns_phy->dev, "Not support ref clock rate\n"); + } + + /* PHY power up */ + ret = hdptx_dp_phy_power_up(cdns_phy); + + return ret; +} + +static const struct phy_ops cdns_hdptx_dp_phy_ops = { + .init = cdns_hdptx_dp_phy_init, + .configure = cdns_hdptx_dp_configure, + .power_on = cdns_hdptx_dp_phy_on, + .power_off = cdns_hdptx_dp_phy_off, + .owner = THIS_MODULE, +}; + +static int cdns_hdptx_dp_phy_probe(struct platform_device *pdev) +{ + struct cdns_hdptx_dp_phy *cdns_phy; + struct device *dev = &pdev->dev; + struct device_node *node = dev->of_node; + struct phy_provider *phy_provider; + struct resource *res; + struct phy *phy; + int ret; + + cdns_phy = devm_kzalloc(dev, sizeof(*cdns_phy), GFP_KERNEL); + if (!cdns_phy) + return -ENOMEM; + + dev_set_drvdata(dev, cdns_phy); + cdns_phy->dev = dev; + mutex_init(&cdns_phy->mbox_mutex); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + cdns_phy->regs = devm_ioremap(dev, res->start, resource_size(res)); + if (IS_ERR(cdns_phy->regs)) + return PTR_ERR(cdns_phy->regs); + + phy = devm_phy_create(dev, node, &cdns_hdptx_dp_phy_ops); + if (IS_ERR(phy)) + return PTR_ERR(phy); + + phy->attrs.mode = PHY_MODE_DP; + cdns_phy->phy = phy; + phy_set_drvdata(phy, cdns_phy); + + ret = hdptx_dp_clk_enable(cdns_phy); + if (ret) { + dev_err(dev, "Init clk fail\n"); + return -EINVAL; + } + + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + if (IS_ERR(phy_provider)) { + ret = PTR_ERR(phy_provider); + goto clk_disable; + } + + return 0; + +clk_disable: + hdptx_dp_clk_disable(cdns_phy); + + return -EINVAL; +} + +static int cdns_hdptx_dp_phy_remove(struct platform_device *pdev) +{ + struct cdns_hdptx_dp_phy *cdns_phy = platform_get_drvdata(pdev); + + hdptx_dp_clk_disable(cdns_phy); + + return 0; +} + +static const struct of_device_id cdns_hdptx_dp_phy_of_match[] = { + {.compatible = "fsl,imx8mq-dp-phy" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, cdns_hdptx_dp_phy_of_match); + +static struct platform_driver cdns_hdptx_dp_phy_driver = { + .probe = cdns_hdptx_dp_phy_probe, + .remove = cdns_hdptx_dp_phy_remove, + .driver = { + .name = "cdns-hdptx-dp-phy", + .of_match_table = cdns_hdptx_dp_phy_of_match, + } +}; +module_platform_driver(cdns_hdptx_dp_phy_driver); + +MODULE_AUTHOR("Sandor Yu "); +MODULE_DESCRIPTION("Cadence HDP-TX DisplayPort PHY driver"); +MODULE_LICENSE("GPL"); -- 2.34.1