Qualcomm SOCs have QMP phy controller that provides support to a number of controller, viz. PCIe, UFS, and USB. Add a new driver, based on generic phy framework, for this phy controller. USB3-phy changes: Based on phy-msm-ssusb-qmp driver available on msm-4.4 kernel @codeaurora[1]. PCIe-phy changes: Based on msm8996-pcie-phy driver posted by Srinivas [2]. [1] https://source.codeaurora.org/quic/la/kernel/msm-4.4/log/?h=caf/3.18/msm-3.18 [2] https://patchwork.kernel.org/patch/9318947/ Signed-off-by: Vivek Gautam <vivek.gautam@xxxxxxxxxxxxxx> Cc: Kishon Vijay Abraham I <kishon@xxxxxx> --- .../devicetree/bindings/phy/qcom-qmp-phy.txt | 61 ++ drivers/phy/Kconfig | 8 + drivers/phy/Makefile | 1 + drivers/phy/phy-qcom-qmp.c | 1154 ++++++++++++++++++++ 4 files changed, 1224 insertions(+) create mode 100644 Documentation/devicetree/bindings/phy/qcom-qmp-phy.txt create mode 100644 drivers/phy/phy-qcom-qmp.c diff --git a/Documentation/devicetree/bindings/phy/qcom-qmp-phy.txt b/Documentation/devicetree/bindings/phy/qcom-qmp-phy.txt new file mode 100644 index 0000000..90214aa --- /dev/null +++ b/Documentation/devicetree/bindings/phy/qcom-qmp-phy.txt @@ -0,0 +1,61 @@ +Qualcomm QMP PHY +---------------- + +QMP phy controller supports physical layer functionality for a number of +controllers on Qualcomm chipsets, such as, PCIe, UFS, and USB. + +Required properties: + - compatible: compatible list, contains: + "qcom,msm8996-qmp-pcie-phy" for 14nm PCIe phy on msm8996, + "qcom,msm8996-qmp-usb3-phy" for 14nm USB3 phy on msm8996. + - reg: offset and length of the PHY register set. + - #phy-cells: must be 1 + - Cell after phy phandle should be the port (lane) number. + - clocks: a list of phandles and clock-specifier pairs, + one for each entry in clock-names. + - clock-names: must be "cfg_ahb" for phy config clock, + "aux" for phy aux clock, + "ref_clk" for 19.2 MHz ref clk, + "ref_clk_src" for reference clock source, + "pipe<port-number>" for pipe clock specific to + each port/lane (Optional). + - resets: a list of phandles and reset controller specifier pairs, + one for each entry in reset-names. + - reset-names: must be "phy" for reset of phy block, + "common" for phy common block reset, + "cfg" for phy's ahb cfg block reset (Optional). + "port<port-number>" for reset specific to + each port/lane. (Optional) + - vdda-phy-supply: Phandle to a regulator supply to PHY core block. + - vdda-pll-supply: Phandle to 1.8V regulator supply to PHY refclk pll block. + +Optional properties: + - vddp-ref-clk-supply: Phandle to a regulator supply to any specific refclk + pll block. + +Example: + pcie_phy: pciephy@34000 { + compatible = "qcom,qmp-14nm-pcie-phy"; + reg = <0x034000 0x3fff>; + #phy-cells = <1>; + + clocks = <&gcc GCC_PCIE_PHY_AUX_CLK>, + <&gcc GCC_PCIE_PHY_CFG_AHB_CLK>, + <&gcc GCC_PCIE_0_PIPE_CLK>, + <&gcc GCC_PCIE_1_PIPE_CLK>, + <&gcc GCC_PCIE_2_PIPE_CLK>; + clock-names = "aux", "cfg_ahb", + "pipe0", "pipe1", "pipe2"; + + vdda-phy-supply = <&pm8994_l28>; + vdda-pll-supply = <&pm8994_l12>; + + resets = <&gcc GCC_PCIE_PHY_BCR>, + <&gcc GCC_PCIE_PHY_COM_BCR>, + <&gcc GCC_PCIE_PHY_COM_NOCSR_BCR>, + <&gcc GCC_PCIE_0_PHY_BCR>, + <&gcc GCC_PCIE_1_PHY_BCR>, + <&gcc GCC_PCIE_2_PHY_BCR>; + reset-names = "phy", "common", "cfg", + "lane0", "lane1", "lane2"; + }; diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 5547984..d5e2b50f 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -446,6 +446,14 @@ config PHY_STIH41X_USB Enable this to support the USB transceiver that is part of STMicroelectronics STiH41x SoC series. +config PHY_QCOM_QMP + tristate "Qualcomm QMP PHY Driver" + depends on OF && (ARCH_QCOM || COMPILE_TEST) + select GENERIC_PHY + help + Enable this to support the QMP PHY transceiver that is used + with controllers such as PCIe, UFS, and USB on Qualcomm chips. + config PHY_QCOM_QUSB2 tristate "Qualcomm QUSB2 PHY Driver" depends on OF && (ARCH_QCOM || COMPILE_TEST) diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 848489d..fde9fba 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -51,6 +51,7 @@ obj-$(CONFIG_PHY_ST_SPEAR1340_MIPHY) += phy-spear1340-miphy.o obj-$(CONFIG_PHY_XGENE) += phy-xgene.o obj-$(CONFIG_PHY_STIH407_USB) += phy-stih407-usb.o obj-$(CONFIG_PHY_STIH41X_USB) += phy-stih41x-usb.o +obj-$(CONFIG_PHY_QCOM_QMP) += phy-qcom-qmp.o obj-$(CONFIG_PHY_QCOM_QUSB2) += phy-qcom-qusb2.o obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs.o obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs-qmp-20nm.o diff --git a/drivers/phy/phy-qcom-qmp.c b/drivers/phy/phy-qcom-qmp.c new file mode 100644 index 0000000..7e89179 --- /dev/null +++ b/drivers/phy/phy-qcom-qmp.c @@ -0,0 +1,1154 @@ +/* + * Copyright (c) 2016, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/phy/phy.h> +#include <linux/platform_device.h> +#include <linux/regulator/consumer.h> +#include <linux/reset.h> +#include <linux/slab.h> + +#include <dt-bindings/phy/phy.h> + +/* QMP PHY QSERDES COM registers */ +#define QSERDES_COM_BG_TIMER 0x00c +#define QSERDES_COM_SSC_EN_CENTER 0x010 +#define QSERDES_COM_SSC_ADJ_PER1 0x014 +#define QSERDES_COM_SSC_ADJ_PER2 0x018 +#define QSERDES_COM_SSC_PER1 0x01c +#define QSERDES_COM_SSC_PER2 0x020 +#define QSERDES_COM_SSC_STEP_SIZE1 0x024 +#define QSERDES_COM_SSC_STEP_SIZE2 0x028 +#define QSERDES_COM_BIAS_EN_CLKBUFLR_EN 0x034 +#define QSERDES_COM_CLK_ENABLE1 0x038 +#define QSERDES_COM_SYS_CLK_CTRL 0x03c +#define QSERDES_COM_SYSCLK_BUF_ENABLE 0x040 +#define QSERDES_COM_PLL_IVCO 0x048 +#define QSERDES_COM_LOCK_CMP1_MODE0 0x04c +#define QSERDES_COM_LOCK_CMP2_MODE0 0x050 +#define QSERDES_COM_LOCK_CMP3_MODE0 0x054 +#define QSERDES_COM_LOCK_CMP1_MODE1 0x058 +#define QSERDES_COM_LOCK_CMP2_MODE1 0x05c +#define QSERDES_COM_LOCK_CMP3_MODE1 0x060 +#define QSERDES_COM_BG_TRIM 0x070 +#define QSERDES_COM_CLK_EP_DIV 0x074 +#define QSERDES_COM_CP_CTRL_MODE0 0x078 +#define QSERDES_COM_CP_CTRL_MODE1 0x07c +#define QSERDES_COM_PLL_RCTRL_MODE0 0x084 +#define QSERDES_COM_PLL_RCTRL_MODE1 0x088 +#define QSERDES_COM_PLL_CCTRL_MODE0 0x090 +#define QSERDES_COM_PLL_CCTRL_MODE1 0x094 +#define QSERDES_COM_SYSCLK_EN_SEL 0x0ac +#define QSERDES_COM_RESETSM_CNTRL 0x0b4 +#define QSERDES_COM_RESTRIM_CTRL 0x0bc +#define QSERDES_COM_RESCODE_DIV_NUM 0x0c4 +#define QSERDES_COM_LOCK_CMP_EN 0x0c8 +#define QSERDES_COM_LOCK_CMP_CFG 0x0cc +#define QSERDES_COM_DEC_START_MODE0 0x0d0 +#define QSERDES_COM_DEC_START_MODE1 0x0d4 +#define QSERDES_COM_DIV_FRAC_START1_MODE0 0x0dc +#define QSERDES_COM_DIV_FRAC_START2_MODE0 0x0e0 +#define QSERDES_COM_DIV_FRAC_START3_MODE0 0x0e4 +#define QSERDES_COM_DIV_FRAC_START1_MODE1 0x0e8 +#define QSERDES_COM_DIV_FRAC_START2_MODE1 0x0ec +#define QSERDES_COM_DIV_FRAC_START3_MODE1 0x0f0 +#define QSERDES_COM_INTEGLOOP_GAIN0_MODE0 0x108 +#define QSERDES_COM_INTEGLOOP_GAIN1_MODE0 0x10c +#define QSERDES_COM_INTEGLOOP_GAIN0_MODE1 0x110 +#define QSERDES_COM_INTEGLOOP_GAIN1_MODE1 0x114 +#define QSERDES_COM_VCO_TUNE_CTRL 0x124 +#define QSERDES_COM_VCO_TUNE_MAP 0x128 +#define QSERDES_COM_VCO_TUNE1_MODE0 0x12c +#define QSERDES_COM_VCO_TUNE2_MODE0 0x130 +#define QSERDES_COM_VCO_TUNE1_MODE1 0x134 +#define QSERDES_COM_VCO_TUNE2_MODE1 0x138 +#define QSERDES_COM_VCO_TUNE_TIMER1 0x144 +#define QSERDES_COM_VCO_TUNE_TIMER2 0x148 +#define QSERDES_COM_BG_CTRL 0x170 +#define QSERDES_COM_CLK_SELECT 0x174 +#define QSERDES_COM_HSCLK_SEL 0x178 +#define QSERDES_COM_CORECLK_DIV 0x184 +#define QSERDES_COM_CORE_CLK_EN 0x18c +#define QSERDES_COM_C_READY_STATUS 0x190 +#define QSERDES_COM_CMN_CONFIG 0x194 +#define QSERDES_COM_SVS_MODE_CLK_SEL 0x19c +#define QSERDES_COM_DEBUG_BUS0 0x1a0 +#define QSERDES_COM_DEBUG_BUS1 0x1a4 +#define QSERDES_COM_DEBUG_BUS2 0x1a8 +#define QSERDES_COM_DEBUG_BUS3 0x1ac +#define QSERDES_COM_DEBUG_BUS_SEL 0x1b0 +#define QSERDES_COM_CORECLK_DIV_MODE1 0x1bc + +/* QMP PHY TX registers */ +#define QSERDES_TX_RES_CODE_LANE_OFFSET 0x054 +#define QSERDES_TX_DEBUG_BUS_SEL 0x064 +#define QSERDES_TX_HIGHZ_TRANSCEIVEREN_BIAS_DRVR_EN 0x068 +#define QSERDES_TX_LANE_MODE 0x094 +#define QSERDES_TX_RCV_DETECT_LVL_2 0x0ac + +/* QMP PHY RX registers */ +#define QSERDES_RX_UCDR_SO_GAIN_HALF 0x010 +#define QSERDES_RX_UCDR_SO_GAIN 0x01c +#define QSERDES_RX_UCDR_FASTLOCK_FO_GAIN 0x040 +#define QSERDES_RX_UCDR_SO_SATURATION_AND_ENABLE 0x048 +#define QSERDES_RX_RX_TERM_BW 0x090 +#define QSERDES_RX_RX_EQ_GAIN1_LSB 0x0c4 +#define QSERDES_RX_RX_EQ_GAIN1_MSB 0x0c8 +#define QSERDES_RX_RX_EQ_GAIN2_LSB 0x0cc +#define QSERDES_RX_RX_EQ_GAIN2_MSB 0x0d0 +#define QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2 0x0d8 +#define QSERDES_RX_RX_EQU_ADAPTOR_CNTRL3 0x0dc +#define QSERDES_RX_RX_EQU_ADAPTOR_CNTRL4 0x0e0 +#define QSERDES_RX_RX_EQ_OFFSET_ADAPTOR_CNTRL1 0x108 +#define QSERDES_RX_RX_OFFSET_ADAPTOR_CNTRL2 0x10c +#define QSERDES_RX_SIGDET_ENABLES 0x110 +#define QSERDES_RX_SIGDET_CNTRL 0x114 +#define QSERDES_RX_SIGDET_LVL 0x118 +#define QSERDES_RX_SIGDET_DEGLITCH_CNTRL 0x11c +#define QSERDES_RX_RX_BAND 0x120 +#define QSERDES_RX_RX_INTERFACE_MODE 0x12c + +/* QMP PHY PCS registers */ +#define QPHY_SW_RESET 0x00 +#define QPHY_POWER_DOWN_CONTROL 0x04 +#define QPHY_START_CTRL 0x08 +#define QPHY_TXDEEMPH_M6DB_V0 0x24 +#define QPHY_TXDEEMPH_M3P5DB_V0 0x28 +#define QPHY_ENDPOINT_REFCLK_DRIVE 0x54 +#define QPHY_RX_IDLE_DTCT_CNTRL 0x58 +#define QPHY_POWER_STATE_CONFIG1 0x60 +#define QPHY_POWER_STATE_CONFIG2 0x64 +#define QPHY_POWER_STATE_CONFIG4 0x6c +#define QPHY_LOCK_DETECT_CONFIG1 0x80 +#define QPHY_LOCK_DETECT_CONFIG2 0x84 +#define QPHY_LOCK_DETECT_CONFIG3 0x88 +#define QPHY_PWRUP_RESET_DLY_TIME_AUXCLK 0xa0 +#define QPHY_LP_WAKEUP_DLY_TIME_AUXCLK 0xa4 + +/* PHY_SW_RESET bit */ +#define PHY_SW_RESET BIT(0) +/* PHY_POWER_DOWN_CONTROL */ +#define PHY_SW_PWRDN BIT(0) +#define PHY_REFCLK_DRV_DSBL BIT(1) +/* PHY_START_CONTROL bits */ +#define PHY_SERDES_START BIT(0) +#define PHY_PCS_START BIT(1) +#define PHY_PLL_READY_GATE_EN BIT(3) +/* PHY_PCS_STATUS bit */ +#define MASK_PHYSTATUS BIT(6) +/* PCS_READY_STATUS bit */ +#define MASK_COM_PCS_READY BIT(0) + +#define REFCLK_STABILIZATION_DELAY_US_MIN 1000 +#define REFCLK_STABILIZATION_DELAY_US_MAX 1005 +#define PHY_READY_TIMEOUT_COUNT 10 +#define POWER_DOWN_DELAY_US_MIN 10 +#define POWER_DOWN_DELAY_US_MAX 11 + +#define MAX_PROP_NAME 32 + +struct qmp_phy_init_tbl { + unsigned int reg_offset; + unsigned int cfg_val; + /* + * register part of layout ? + * if yes, then reg_offset gives index in the reg-layout + */ + int in_layout; +}; +#define QCOM_QMP_PHY_INIT_CFG(reg, val) \ + { \ + .reg_offset = reg, \ + .cfg_val = val, \ + } +#define QCOM_QMP_PHY_INIT_CFG_L(reg, val) \ + { \ + .reg_offset = reg, \ + .cfg_val = val, \ + .in_layout = 1, \ + } + +/* set of registers with offsets different per-PHY */ +enum qphy_reg_layout { + /* Common block control registers */ + QPHY_COM_SW_RESET, + QPHY_COM_POWER_DOWN_CONTROL, + QPHY_COM_START_CONTROL, + QPHY_COM_PCS_READY_STATUS, + /* PCS registers */ + QPHY_PLL_LOCK_CHK_DLY_TIME, + QPHY_FLL_CNTRL1, + QPHY_FLL_CNTRL2, + QPHY_FLL_CNT_VAL_L, + QPHY_FLL_CNT_VAL_H_TOL, + QPHY_FLL_MAN_CODE, + QPHY_PCS_READY_STATUS, +}; + +unsigned int pciephy_regs_layout[] = { + [QPHY_COM_SW_RESET] = 0x400, + [QPHY_COM_POWER_DOWN_CONTROL] = 0x404, + [QPHY_COM_START_CONTROL] = 0x408, + [QPHY_COM_PCS_READY_STATUS] = 0x448, + [QPHY_PLL_LOCK_CHK_DLY_TIME] = 0xa8, + [QPHY_FLL_CNTRL1] = 0xc4, + [QPHY_FLL_CNTRL2] = 0xc8, + [QPHY_FLL_CNT_VAL_L] = 0xcc, + [QPHY_FLL_CNT_VAL_H_TOL] = 0xd0, + [QPHY_FLL_MAN_CODE] = 0xd4, + [QPHY_PCS_READY_STATUS] = 0x174, +}; + +unsigned int usb3phy_regs_layout[] = { + [QPHY_FLL_CNTRL1] = 0xc0, + [QPHY_FLL_CNTRL2] = 0xc4, + [QPHY_FLL_CNT_VAL_L] = 0xc8, + [QPHY_FLL_CNT_VAL_H_TOL] = 0xcc, + [QPHY_FLL_MAN_CODE] = 0xd0, + [QPHY_PCS_READY_STATUS] = 0x17c, +}; + +static struct qmp_phy_init_tbl pciephy_serdes_init_tbl[] = { + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x1c), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_CLK_ENABLE1, 0x10), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_CLK_SELECT, 0x33), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_CMN_CONFIG, 0x06), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP_EN, 0x42), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_MAP, 0x00), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_TIMER1, 0xff), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_TIMER2, 0x1f), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_HSCLK_SEL, 0x01), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SVS_MODE_CLK_SEL, 0x01), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_CORE_CLK_EN, 0x00), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_CORECLK_DIV, 0x0a), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_BG_TIMER, 0x09), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_DEC_START_MODE0, 0x82), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START3_MODE0, 0x03), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START2_MODE0, 0x55), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START1_MODE0, 0x55), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP3_MODE0, 0x00), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP2_MODE0, 0x1a), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP1_MODE0, 0x0a), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_CLK_SELECT, 0x33), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SYS_CLK_CTRL, 0x02), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SYSCLK_BUF_ENABLE, 0x1f), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SYSCLK_EN_SEL, 0x04), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_CP_CTRL_MODE0, 0x0b), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_PLL_RCTRL_MODE0, 0x16), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_PLL_CCTRL_MODE0, 0x28), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_INTEGLOOP_GAIN1_MODE0, 0x00), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_INTEGLOOP_GAIN0_MODE0, 0x80), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SSC_EN_CENTER, 0x01), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER1, 0x31), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER2, 0x01), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER1, 0x02), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER2, 0x00), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE1, 0x2f), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE2, 0x19), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_RESCODE_DIV_NUM, 0x15), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_BG_TRIM, 0x0f), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_PLL_IVCO, 0x0f), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_CLK_EP_DIV, 0x19), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_CLK_ENABLE1, 0x10), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_HSCLK_SEL, 0x00), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_RESCODE_DIV_NUM, 0x40), +}; + +static struct qmp_phy_init_tbl pciephy_tx_init_tbl[] = { + QCOM_QMP_PHY_INIT_CFG(QSERDES_TX_HIGHZ_TRANSCEIVEREN_BIAS_DRVR_EN, 0x45), + QCOM_QMP_PHY_INIT_CFG(QSERDES_TX_LANE_MODE, 0x06), +}; + +static struct qmp_phy_init_tbl pciephy_rx_init_tbl[] = { + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_ENABLES, 0x1c), + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2, 0x01), + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL3, 0x00), + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL4, 0xdb), + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_RX_BAND, 0x18), + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_GAIN, 0x04), + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_GAIN_HALF, 0x04), + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_SATURATION_AND_ENABLE, 0x4b), + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_DEGLITCH_CNTRL, 0x14), + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_LVL, 0x19), +}; + +static struct qmp_phy_init_tbl pciephy_pcs_init_tbl[] = { + QCOM_QMP_PHY_INIT_CFG(QPHY_RX_IDLE_DTCT_CNTRL, 0x4c), + QCOM_QMP_PHY_INIT_CFG(QPHY_PWRUP_RESET_DLY_TIME_AUXCLK, 0x00), + QCOM_QMP_PHY_INIT_CFG(QPHY_LP_WAKEUP_DLY_TIME_AUXCLK, 0x01), + + QCOM_QMP_PHY_INIT_CFG_L(QPHY_PLL_LOCK_CHK_DLY_TIME, 0x05), + + QCOM_QMP_PHY_INIT_CFG(QPHY_ENDPOINT_REFCLK_DRIVE, 0x05), + QCOM_QMP_PHY_INIT_CFG(QPHY_POWER_DOWN_CONTROL, 0x02), + QCOM_QMP_PHY_INIT_CFG(QPHY_POWER_STATE_CONFIG4, 0x00), + QCOM_QMP_PHY_INIT_CFG(QPHY_POWER_STATE_CONFIG1, 0xa3), + QCOM_QMP_PHY_INIT_CFG(QPHY_TXDEEMPH_M3P5DB_V0, 0x0e), +}; + +static struct qmp_phy_init_tbl usb3phy_serdes_init_tbl[] = { + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SYSCLK_EN_SEL, 0x14), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x08), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_CLK_SELECT, 0x30), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_CMN_CONFIG, 0x06), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SVS_MODE_CLK_SEL, 0x01), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_HSCLK_SEL, 0x00), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_BG_TRIM, 0x0f), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_PLL_IVCO, 0x0f), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SYS_CLK_CTRL, 0x04), + /* PLL and Loop filter settings */ + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_DEC_START_MODE0, 0x82), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START1_MODE0, 0x55), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START2_MODE0, 0x55), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START3_MODE0, 0x03), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_CP_CTRL_MODE0, 0x0b), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_PLL_RCTRL_MODE0, 0x16), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_PLL_CCTRL_MODE0, 0x28), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_INTEGLOOP_GAIN0_MODE0, 0x80), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_CTRL, 0x00), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP1_MODE0, 0x15), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP2_MODE0, 0x34), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP3_MODE0, 0x00), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_CORE_CLK_EN, 0x00), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP_CFG, 0x00), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_MAP, 0x00), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_BG_TIMER, 0x0a), + /* SSC settings */ + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SSC_EN_CENTER, 0x01), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER1, 0x31), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER2, 0x01), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER1, 0x00), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER2, 0x00), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE1, 0xde), + QCOM_QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE2, 0x07), +}; + +static struct qmp_phy_init_tbl usb3phy_tx_init_tbl[] = { + QCOM_QMP_PHY_INIT_CFG(QSERDES_TX_HIGHZ_TRANSCEIVEREN_BIAS_DRVR_EN, 0x45), + QCOM_QMP_PHY_INIT_CFG(QSERDES_TX_RCV_DETECT_LVL_2, 0x12), + QCOM_QMP_PHY_INIT_CFG(QSERDES_TX_LANE_MODE, 0x06), +}; + +static struct qmp_phy_init_tbl usb3phy_rx_init_tbl[] = { + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_FASTLOCK_FO_GAIN, 0x0b), + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_GAIN, 0x04), + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2, 0x02), + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL3, 0x4c), + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL4, 0xbb), + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQ_OFFSET_ADAPTOR_CNTRL1, 0x77), + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_RX_OFFSET_ADAPTOR_CNTRL2, 0x80), + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_CNTRL, 0x03), + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_LVL, 0x18), + QCOM_QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_DEGLITCH_CNTRL, 0x16), +}; + +static struct qmp_phy_init_tbl usb3phy_pcs_init_tbl[] = { + /* FLL settings */ + QCOM_QMP_PHY_INIT_CFG_L(QPHY_FLL_CNTRL2, 0x03), + QCOM_QMP_PHY_INIT_CFG_L(QPHY_FLL_CNTRL1, 0x02), + QCOM_QMP_PHY_INIT_CFG_L(QPHY_FLL_CNT_VAL_L, 0x09), + QCOM_QMP_PHY_INIT_CFG_L(QPHY_FLL_CNT_VAL_H_TOL, 0x42), + QCOM_QMP_PHY_INIT_CFG_L(QPHY_FLL_MAN_CODE, 0x85), + + /* Lock Det settings */ + QCOM_QMP_PHY_INIT_CFG(QPHY_LOCK_DETECT_CONFIG1, 0xd1), + QCOM_QMP_PHY_INIT_CFG(QPHY_LOCK_DETECT_CONFIG2, 0x1f), + QCOM_QMP_PHY_INIT_CFG(QPHY_LOCK_DETECT_CONFIG3, 0x47), + QCOM_QMP_PHY_INIT_CFG(QPHY_POWER_STATE_CONFIG2, 0x08), +}; + +/** + * struct qmp_phy_init_cfg:- per-PHY init config. + */ +struct qmp_phy_init_cfg { + /* + * @type: phy-type - PCIE/UFS/USB + * @nlanes: number of lanes provided by phy + * @tx_offsets: array of offsets of Tx block from PHY base + * @rx_offsets: array of offsets of Rx block from PHY base + * @pcs_offsets: array of offsets of PCS block from PHY base + */ + unsigned int type; + int nlanes; + unsigned int *tx_offsets; + unsigned int *rx_offsets; + unsigned int *pcs_offsets; + + /* Initialization sequence for PHY blocks - Serdes, tx, rx, pcs */ + struct qmp_phy_init_tbl *phy_init_serdes_tbl; + int phy_init_serdes_tbl_sz; + struct qmp_phy_init_tbl *phy_init_tx_tbl; + int phy_init_tx_tbl_sz; + struct qmp_phy_init_tbl *phy_init_rx_tbl; + int phy_init_rx_tbl_sz; + struct qmp_phy_init_tbl *phy_init_pcs_tbl; + int phy_init_pcs_tbl_sz; + + /* array of registers with different offsets */ + unsigned int *regs; + + unsigned int mask_start_ctrl; + unsigned int mask_pwr_dn_ctrl; + /* true, if PHY has a separate PHY_COM_CNTRL block */ + bool has_phy_com_ctrl; +}; + +/** + * struct qmp_phy_desc:- per-lane phy-descriptor. + * + * @phy: pointer to generic phy + * @tx: pointer to iomapped memory space for PHY's tx + * @rx: pointer to iomapped memory space for PHY's rx + * @pcs: pointer to iomapped memory space for PHY's pcs + * @pipe_clk: pointer to pipe lock + * @index: lane index + * @qphy: pointer to QMP phy to which this lane belongs + * @lane_rst: pointer to lane's reset controller + */ +struct qmp_phy_desc { + struct phy *phy; + void __iomem *tx; + void __iomem *rx; + void __iomem *pcs; + struct clk *pipe_clk; + unsigned int index; + struct qcom_qmp_phy *qphy; + struct reset_control *lane_rst; +}; + +/** + * struct qcom_qmp_phy:- structure holding QMP PHY attributes. + * + * @dev: pointer to device + * @serdes: pointer to iomapped memory space for phy's serdes + * + * @aux_clk: pointer to phy core clock + * @cfg_ahb_clk: pointer to AHB2PHY interface clock + * @ref_clk: pointer to reference clock + * @ref_clk_src: pointer to source to reference clock + * @clk_enabled: check if clocks are enabled or not + * + * @vdda_phy: vdd supply to the phy core block + * @vdda_pll: 1.8V vdd supply to ref_clk block + * @vddp_ref_clk: vdd supply to specific ref_clk block + * + * @phy_rst: Pointer to phy reset control + * @phycom_rst: Pointer to phy common reset control + * @phycfg_rst: Pointer to phy ahb cfg reset control (Optional) + * + * @cfg: pointer to init config for each phys + * @phys: array of pointer to per-lane phy descriptors + * @phy_mutex: mutex lock for PHY common block initialization + * @init_count: Phy common block initialization count + */ +struct qcom_qmp_phy { + struct device *dev; + void __iomem *serdes; + + struct clk *aux_clk; + struct clk *cfg_ahb_clk; + struct clk *ref_clk; + struct clk *ref_clk_src; + bool clk_enabled; + + struct regulator *vdda_phy; + struct regulator *vdda_pll; + struct regulator *vddp_ref_clk; + + struct reset_control *phy_rst; + struct reset_control *phycom_rst; + struct reset_control *phycfg_rst; + + const struct qmp_phy_init_cfg *cfg; + struct qmp_phy_desc **phys; + + struct mutex phy_mutex; + int init_count; +}; + +static inline void qphy_setbits(u32 bitmask, void __iomem *reg) +{ + u32 val; + + val = readl_relaxed(reg); + val |= bitmask; + writel_relaxed(val, reg); +} + +static inline void qphy_clrbits(u32 bitmask, void __iomem *reg) +{ + u32 val; + + val = readl_relaxed(reg); + val &= ~bitmask; + writel_relaxed(val, reg); +} + +unsigned int msm8996_pciephy_tx_offsets[] = { 0x1000, 0x2000, 0x3000 }; +unsigned int msm8996_pciephy_rx_offsets[] = { 0x1200, 0x2200, 0x3200 }; +unsigned int msm8996_pciephy_pcs_offsets[] = { 0x1400, 0x2400, 0x3400 }; + +unsigned int msm8996_usb3phy_tx_offsets[] = { 0x200 }; +unsigned int msm8996_usb3phy_rx_offsets[] = { 0x400 }; +unsigned int msm8996_usb3phy_pcs_offsets[] = { 0x600 }; + +const struct qmp_phy_init_cfg pciephy_init_cfg = { + .type = PHY_TYPE_PCIE, + .nlanes = 3, + .tx_offsets = msm8996_pciephy_tx_offsets, + .rx_offsets = msm8996_pciephy_rx_offsets, + .pcs_offsets = msm8996_pciephy_pcs_offsets, + + .phy_init_serdes_tbl = pciephy_serdes_init_tbl, + .phy_init_serdes_tbl_sz = ARRAY_SIZE(pciephy_serdes_init_tbl), + .phy_init_tx_tbl = pciephy_tx_init_tbl, + .phy_init_tx_tbl_sz = ARRAY_SIZE(pciephy_tx_init_tbl), + .phy_init_rx_tbl = pciephy_rx_init_tbl, + .phy_init_rx_tbl_sz = ARRAY_SIZE(pciephy_rx_init_tbl), + .phy_init_pcs_tbl = pciephy_pcs_init_tbl, + .phy_init_pcs_tbl_sz = ARRAY_SIZE(pciephy_pcs_init_tbl), + .has_phy_com_ctrl = true, + .regs = pciephy_regs_layout, + .mask_start_ctrl = (PHY_PCS_START | PHY_PLL_READY_GATE_EN), + .mask_pwr_dn_ctrl = (PHY_SW_PWRDN | PHY_REFCLK_DRV_DSBL), +}; + +const struct qmp_phy_init_cfg usb3phy_init_cfg = { + .type = PHY_TYPE_USB3, + .nlanes = 1, + .tx_offsets = msm8996_usb3phy_tx_offsets, + .rx_offsets = msm8996_usb3phy_rx_offsets, + .pcs_offsets = msm8996_usb3phy_pcs_offsets, + + .phy_init_serdes_tbl = usb3phy_serdes_init_tbl, + .phy_init_serdes_tbl_sz = ARRAY_SIZE(usb3phy_serdes_init_tbl), + .phy_init_tx_tbl = usb3phy_tx_init_tbl, + .phy_init_tx_tbl_sz = ARRAY_SIZE(usb3phy_tx_init_tbl), + .phy_init_rx_tbl = usb3phy_rx_init_tbl, + .phy_init_rx_tbl_sz = ARRAY_SIZE(usb3phy_rx_init_tbl), + .phy_init_pcs_tbl = usb3phy_pcs_init_tbl, + .phy_init_pcs_tbl_sz = ARRAY_SIZE(usb3phy_pcs_init_tbl), + .regs = usb3phy_regs_layout, + .mask_start_ctrl = (PHY_SERDES_START | PHY_PCS_START), + .mask_pwr_dn_ctrl = PHY_SW_PWRDN, +}; + +static void qcom_qmp_phy_configure(void __iomem *base, + unsigned int *regs_layout, + struct qmp_phy_init_tbl init_tbl[], + int init_tbl_sz) +{ + int i; + + for (i = 0; i < init_tbl_sz; i++) { + if (init_tbl[i].in_layout) + writel_relaxed(init_tbl[i].cfg_val, + base + regs_layout[init_tbl[i].reg_offset]); + else + writel_relaxed(init_tbl[i].cfg_val, + base + init_tbl[i].reg_offset); + } + + /* flush buffered writes */ + mb(); +} + +static int qcom_qmp_phy_poweron(struct phy *phy) +{ + struct qmp_phy_desc *phydesc = phy_get_drvdata(phy); + struct qcom_qmp_phy *qphy = phydesc->qphy; + int ret; + + dev_info(&phy->dev, "Powering on QMP phy\n"); + + ret = regulator_enable(qphy->vdda_phy); + if (ret) { + dev_err(qphy->dev, "%s: vdda-phy enable failed, err=%d\n", + __func__, ret); + return ret; + } + + ret = regulator_enable(qphy->vdda_pll); + if (ret) { + dev_err(qphy->dev, "%s: vdda-pll enable failed, err=%d\n", + __func__, ret); + goto err_vdda_pll; + } + + if (qphy->vddp_ref_clk) { + ret = regulator_enable(qphy->vddp_ref_clk); + if (ret) { + dev_err(qphy->dev, "%s: vdda-ref-clk enable failed, err=%d\n", + __func__, ret); + goto err_vddp_refclk; + } + } + + if (!qphy->clk_enabled) { + clk_prepare_enable(qphy->ref_clk_src); + clk_prepare_enable(qphy->ref_clk); + clk_prepare_enable(phydesc->pipe_clk); + qphy->clk_enabled = true; + } + + return 0; + +err_vddp_refclk: + regulator_disable(qphy->vdda_pll); +err_vdda_pll: + regulator_disable(qphy->vdda_phy); + return ret; +} + +static int qcom_qmp_phy_poweroff(struct phy *phy) +{ + struct qmp_phy_desc *phydesc = phy_get_drvdata(phy); + struct qcom_qmp_phy *qphy = phydesc->qphy; + + if (qphy->clk_enabled) { + clk_disable_unprepare(qphy->ref_clk_src); + clk_disable_unprepare(qphy->ref_clk); + clk_disable_unprepare(phydesc->pipe_clk); + qphy->clk_enabled = false; + } + + if (qphy->vddp_ref_clk) + regulator_disable(qphy->vddp_ref_clk); + + regulator_disable(qphy->vdda_pll); + regulator_disable(qphy->vdda_phy); + + return 0; +} + +static int qcom_qmp_phy_is_ready(struct qcom_qmp_phy *qphy, + void __iomem *pcs_status, u32 mask) +{ + unsigned int init_timeout; + + init_timeout = PHY_READY_TIMEOUT_COUNT; + do { + if (readl_relaxed(pcs_status) & mask) + break; + + usleep_range(REFCLK_STABILIZATION_DELAY_US_MIN, + REFCLK_STABILIZATION_DELAY_US_MAX); + } while (--init_timeout); + + if (!init_timeout) + return -EBUSY; + + return 0; +} + +static int qcom_qmp_phy_com_init(struct qcom_qmp_phy *qphy) +{ + const struct qmp_phy_init_cfg *cfg = qphy->cfg; + void __iomem *serdes = qphy->serdes; + int ret; + + mutex_lock(&qphy->phy_mutex); + if (qphy->init_count++) { + mutex_unlock(&qphy->phy_mutex); + return 0; + } + + ret = reset_control_deassert(qphy->phy_rst); + if (ret) { + dev_err(qphy->dev, "phy reset deassert failed\n"); + return ret; + } + + ret = reset_control_deassert(qphy->phycom_rst); + if (ret) { + dev_err(qphy->dev, "common reset deassert failed\n"); + goto err_phycom_rst; + } + + if (qphy->phycfg_rst) { + ret = reset_control_deassert(qphy->phycfg_rst); + if (ret) { + dev_err(qphy->dev, "common reset deassert failed\n"); + goto err_phycfg_rst; + } + } + + if (cfg->has_phy_com_ctrl) { + qphy_setbits(PHY_SW_PWRDN, + serdes + cfg->regs[QPHY_COM_POWER_DOWN_CONTROL]); + /* Make sure that above write is completed */ + mb(); + } + + /* Serdes configuration */ + qcom_qmp_phy_configure(serdes, cfg->regs, cfg->phy_init_serdes_tbl, + cfg->phy_init_serdes_tbl_sz); + + if (cfg->has_phy_com_ctrl) { + qphy_clrbits(PHY_SW_RESET, serdes + + cfg->regs[QPHY_COM_SW_RESET]); + qphy_setbits(PHY_SERDES_START | PHY_PCS_START, + serdes + cfg->regs[QPHY_COM_START_CONTROL]); + /* Make sure that above write is completed */ + mb(); + + ret = qcom_qmp_phy_is_ready(qphy, serdes + + cfg->regs[QPHY_COM_PCS_READY_STATUS], + MASK_COM_PCS_READY); + if (ret) { + dev_err(qphy->dev, + "common control block init timed-out\n"); + goto err_phy_comctrl; + } + } + + mutex_unlock(&qphy->phy_mutex); + + return 0; + +err_phy_comctrl: + if (qphy->phycfg_rst) + reset_control_assert(qphy->phycfg_rst); +err_phycfg_rst: + reset_control_assert(qphy->phycom_rst); +err_phycom_rst: + reset_control_assert(qphy->phy_rst); + return ret; +} + +static int qcom_qmp_phy_com_exit(struct qcom_qmp_phy *qphy) +{ + const struct qmp_phy_init_cfg *cfg = qphy->cfg; + void __iomem *serdes = qphy->serdes; + + mutex_lock(&qphy->phy_mutex); + if (--qphy->init_count) { + mutex_unlock(&qphy->phy_mutex); + return 0; + } + + if (cfg->has_phy_com_ctrl) { + qphy_setbits(PHY_SERDES_START | PHY_PCS_START, + serdes + cfg->regs[QPHY_COM_START_CONTROL]); + qphy_clrbits(PHY_SW_RESET, serdes + + cfg->regs[QPHY_COM_SW_RESET]); + qphy_setbits(PHY_SW_PWRDN, + serdes + cfg->regs[QPHY_COM_POWER_DOWN_CONTROL]); + + /* Make sure that above writes are completed */ + mb(); + } + + reset_control_assert(qphy->phy_rst); + reset_control_assert(qphy->phycom_rst); + if (qphy->phycfg_rst) + reset_control_assert(qphy->phycfg_rst); + + mutex_unlock(&qphy->phy_mutex); + + return 0; +} + +/* PHY Initialization */ +static int qcom_qmp_phy_init(struct phy *phy) +{ + struct qmp_phy_desc *phydesc = phy_get_drvdata(phy); + struct qcom_qmp_phy *qphy = phydesc->qphy; + const struct qmp_phy_init_cfg *cfg = qphy->cfg; + void __iomem *tx = phydesc->tx; + void __iomem *rx = phydesc->rx; + void __iomem *pcs = phydesc->pcs; + int ret; + + dev_info(qphy->dev, "Initializing QMP phy\n"); + + /* enable interface clocks to program phy */ + clk_prepare_enable(qphy->aux_clk); + clk_prepare_enable(qphy->cfg_ahb_clk); + + ret = qcom_qmp_phy_com_init(qphy); + if (ret) + goto err; + + if (phydesc->lane_rst) { + ret = reset_control_deassert(phydesc->lane_rst); + if (ret) { + dev_err(qphy->dev, "lane<%d> reset deassert failed\n", + phydesc->index); + goto err_lane_rst; + } + } + + /* Tx, Rx, and PCS configurations */ + qcom_qmp_phy_configure(tx, cfg->regs, cfg->phy_init_tx_tbl, + cfg->phy_init_tx_tbl_sz); + qcom_qmp_phy_configure(rx, cfg->regs, cfg->phy_init_rx_tbl, + cfg->phy_init_rx_tbl_sz); + qcom_qmp_phy_configure(pcs, cfg->regs, cfg->phy_init_pcs_tbl, + cfg->phy_init_pcs_tbl_sz); + + /* + * Pull out PHY from POWER DOWN state: + * This is active low enable signal to power-down PHY. + */ + qphy_setbits(cfg->mask_pwr_dn_ctrl, + pcs + QPHY_POWER_DOWN_CONTROL); + /* XXX: 10 us delay; given in PCIE HPG only */ + usleep_range(POWER_DOWN_DELAY_US_MIN, POWER_DOWN_DELAY_US_MAX); + + /* start SerDes and Phy-Coding-Sublayer */ + qphy_setbits(cfg->mask_start_ctrl, pcs + QPHY_START_CTRL); + + /* Pull PHY out of reset state */ + qphy_clrbits(PHY_SW_RESET, pcs + QPHY_SW_RESET); + /* Make sure that above writes are completed */ + mb(); + + ret = qcom_qmp_phy_is_ready(qphy, pcs + + cfg->regs[QPHY_PCS_READY_STATUS], + MASK_PHYSTATUS); + if (ret) { + dev_err(qphy->dev, "phy initialization timed-out\n"); + goto err_pcs_ready; + } + + return 0; + +err_pcs_ready: + if (phydesc->lane_rst) + reset_control_assert(phydesc->lane_rst); +err_lane_rst: + qcom_qmp_phy_com_exit(qphy); +err: + clk_disable_unprepare(qphy->cfg_ahb_clk); + clk_disable_unprepare(qphy->aux_clk); + return ret; +} + +static int qcom_qmp_phy_exit(struct phy *phy) +{ + struct qmp_phy_desc *phydesc = phy_get_drvdata(phy); + struct qcom_qmp_phy *qphy = phydesc->qphy; + const struct qmp_phy_init_cfg *cfg = qphy->cfg; + + /* PHY reset */ + qphy_setbits(PHY_SW_RESET, phydesc->pcs + QPHY_SW_RESET); + + /* stop SerDes and Phy-Coding-Sublayer */ + qphy_clrbits(cfg->mask_start_ctrl, phydesc->pcs + QPHY_START_CTRL); + + /* Put PHY into POWER DOWN state: active low */ + qphy_clrbits(cfg->mask_pwr_dn_ctrl, + phydesc->pcs + QPHY_POWER_DOWN_CONTROL); + + /* Make sure that above writes are completed */ + mb(); + + if (phydesc->lane_rst) + reset_control_assert(phydesc->lane_rst); + + qcom_qmp_phy_com_exit(qphy); + + clk_disable_unprepare(qphy->aux_clk); + clk_disable_unprepare(qphy->cfg_ahb_clk); + + return 0; +} + + +static int qcom_qmp_phy_regulator_init(struct device *dev) +{ + struct qcom_qmp_phy *qphy = dev_get_drvdata(dev); + int ret = 0; + + qphy->vdda_phy = devm_regulator_get(dev, "vdda-phy"); + if (IS_ERR(qphy->vdda_phy)) { + ret = PTR_ERR(qphy->vdda_phy); + dev_err(dev, "failed to get vdda-phy, %d\n", ret); + return ret; + } + + qphy->vdda_pll = devm_regulator_get(dev, "vdda-pll"); + if (IS_ERR(qphy->vdda_pll)) { + ret = PTR_ERR(qphy->vdda_pll); + dev_err(dev, "failed to get vdda-pll, %d\n", ret); + return ret; + } + + /* optional regulator */ + qphy->vddp_ref_clk = devm_regulator_get(dev, "vddp-ref-clk"); + if (IS_ERR(qphy->vddp_ref_clk)) { + ret = PTR_ERR(qphy->vddp_ref_clk); + dev_info(dev, "failed to get vddp-ref-clk, %d\n", ret); + qphy->vddp_ref_clk = NULL; + } + + return 0; +} + +static int qcom_qmp_phy_clk_init(struct device *dev) +{ + struct qcom_qmp_phy *qphy = dev_get_drvdata(dev); + int ret; + + qphy->aux_clk = devm_clk_get(dev, "aux"); + if (IS_ERR(qphy->aux_clk)) { + ret = PTR_ERR(qphy->aux_clk); + if (ret != -EPROBE_DEFER) + dev_err(dev, "failed to get aux_clk\n"); + return ret; + } + + qphy->cfg_ahb_clk = devm_clk_get(dev, "cfg_ahb"); + if (IS_ERR(qphy->cfg_ahb_clk)) { + ret = PTR_ERR(qphy->cfg_ahb_clk); + if (ret != -EPROBE_DEFER) + dev_err(dev, "failed to get cfg_ahb_clk\n"); + return ret; + } + + /* + * ref_clk and ref_clk_src handles may not be available in + * all hardwares. So we don't return error in these cases. + */ + qphy->ref_clk_src = devm_clk_get(dev, "ref_clk_src"); + if (IS_ERR(qphy->ref_clk_src)) { + ret = PTR_ERR(qphy->ref_clk_src); + if (ret != -EPROBE_DEFER) { + qphy->ref_clk_src = NULL; + dev_dbg(dev, "failed to get ref_clk_src\n"); + } else { + return ret; + } + } + + qphy->ref_clk = devm_clk_get(dev, "ref_clk"); + if (IS_ERR(qphy->ref_clk)) { + ret = PTR_ERR(qphy->ref_clk); + if (ret != -EPROBE_DEFER) { + qphy->ref_clk = NULL; + dev_dbg(dev, "failed to get ref_clk\n"); + } else { + return ret; + } + } + + return 0; +} + +static struct phy *qcom_qmp_phy_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct qcom_qmp_phy *qphy = dev_get_drvdata(dev); + int i; + + if (WARN_ON(args->args[0] >= qphy->cfg->nlanes)) + return ERR_PTR(-ENODEV); + + for (i = 0; i < qphy->cfg->nlanes; i++) { + if (qphy->phys[i]->index == args->args[0]) + break; + } + + if (i == qphy->cfg->nlanes) + return ERR_PTR(-ENODEV); + + return qphy->phys[i]->phy; +} + +static const struct phy_ops qcom_qmp_phy_gen_ops = { + .init = qcom_qmp_phy_init, + .exit = qcom_qmp_phy_exit, + .power_on = qcom_qmp_phy_poweron, + .power_off = qcom_qmp_phy_poweroff, + .owner = THIS_MODULE, +}; + +static const struct of_device_id qcom_qmp_phy_of_match_table[] = { + { + .compatible = "qcom,msm8996-qmp-pcie-phy", + .data = &pciephy_init_cfg, + }, { + .compatible = "qcom,msm8996-qmp-usb3-phy", + .data = &usb3phy_init_cfg, + }, + { }, +}; +MODULE_DEVICE_TABLE(of, qcom_qmp_phy_of_match_table); + +static int qcom_qmp_phy_probe(struct platform_device *pdev) +{ + struct qcom_qmp_phy *qphy; + struct device *dev = &pdev->dev; + struct device_node *child; + struct phy_provider *phy_provider; + struct resource *res; + const struct of_device_id *match; + void __iomem *base; + int ret = 0; + int id; + + qphy = devm_kzalloc(dev, sizeof(*qphy), GFP_KERNEL); + if (!qphy) + return -ENOMEM; + qphy->dev = dev; + dev_set_drvdata(dev, qphy); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + base = devm_ioremap_resource(dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + /* per PHY serdes; usually located at base address */ + qphy->serdes = base; + + mutex_init(&qphy->phy_mutex); + + /* Get the specific init parameters of QMP phy */ + match = of_match_node(qcom_qmp_phy_of_match_table, dev->of_node); + qphy->cfg = match->data; + + ret = qcom_qmp_phy_clk_init(dev); + if (ret) { + dev_err(dev, "clock init failed\n"); + return ret; + } + + ret = qcom_qmp_phy_regulator_init(dev); + if (ret) { + dev_err(dev, "regulator init failed\n"); + return ret; + } + + qphy->phy_rst = devm_reset_control_get(dev, "phy"); + if (IS_ERR(qphy->phy_rst)) { + dev_err(dev, "failed to get phy core reset\n"); + return PTR_ERR(qphy->phy_rst); + } + + qphy->phycom_rst = devm_reset_control_get(dev, "common"); + if (IS_ERR(qphy->phycom_rst)) { + dev_err(dev, "failed to get phy common reset\n"); + return PTR_ERR(qphy->phycom_rst); + } + + qphy->phycfg_rst = devm_reset_control_get(dev, "cfg"); + if (IS_ERR(qphy->phycfg_rst)) { + dev_err(dev, "failed to get phy ahb cfg reset\n"); + qphy->phycfg_rst = NULL; + } + + qphy->phys = devm_kcalloc(dev, qphy->cfg->nlanes, + sizeof(*qphy->phys), GFP_KERNEL); + if (!qphy->phys) + return -ENOMEM; + + for (id = 0; id < qphy->cfg->nlanes; id++) { + struct phy *generic_phy; + struct qmp_phy_desc *phy_desc; + char prop_name[MAX_PROP_NAME]; + + phy_desc = devm_kzalloc(dev, sizeof(*phy_desc), GFP_KERNEL); + if (!phy_desc) { + ret = -ENOMEM; + goto put_child; + } + + phy_desc->tx = base + qphy->cfg->tx_offsets[id]; + phy_desc->rx = base + qphy->cfg->rx_offsets[id]; + phy_desc->pcs = base + qphy->cfg->pcs_offsets[id]; + + /* + * Get PHY's Pipe clock, if any; USB3 and PCIe are PIPE + * based phys, so they essentially have pipe clock + */ + memset(&prop_name, 0, sizeof(prop_name)); + snprintf(prop_name, MAX_PROP_NAME, "pipe%d", id); + phy_desc->pipe_clk = devm_clk_get(dev, prop_name); + if (IS_ERR(phy_desc->pipe_clk)) { + if (qphy->cfg->type == PHY_TYPE_PCIE || + qphy->cfg->type == PHY_TYPE_USB3) { + ret = PTR_ERR(phy_desc->pipe_clk); + if (ret != -EPROBE_DEFER) + dev_err(dev, + "failed to get lane%d pipe_clk\n", id); + return ret; + } else { + phy_desc->pipe_clk = NULL; + } + } + + /* Get lane reset, if any */ + memset(&prop_name, 0, sizeof(prop_name)); + snprintf(prop_name, MAX_PROP_NAME, "lane%d", id); + phy_desc->lane_rst = devm_reset_control_get(dev, prop_name); + if (IS_ERR(phy_desc->lane_rst)) { + if (qphy->cfg->type == PHY_TYPE_PCIE) { + dev_err(dev, "failed to get lane%d reset\n", + id); + ret = PTR_ERR(phy_desc->lane_rst); + goto put_child; + } else { + phy_desc->lane_rst = NULL; + } + } + + generic_phy = devm_phy_create(dev, NULL, &qcom_qmp_phy_gen_ops); + if (IS_ERR(generic_phy)) { + ret = PTR_ERR(generic_phy); + dev_err(dev, "failed to create qphy %d\n", ret); + goto put_child; + } + + phy_desc->phy = generic_phy; + phy_desc->index = id; + phy_desc->qphy = qphy; + phy_set_drvdata(generic_phy, phy_desc); + qphy->phys[id] = phy_desc; + } + + phy_provider = devm_of_phy_provider_register(dev, qcom_qmp_phy_xlate); + if (IS_ERR(phy_provider)) { + ret = PTR_ERR(phy_provider); + dev_err(dev, "failed to register qphy %d\n", ret); + goto put_child; + } + +put_child: + of_node_put(child); + return ret; +} + +static struct platform_driver qcom_qmp_phy_driver = { + .probe = qcom_qmp_phy_probe, + .driver = { + .name = "qcom_qmp_phy", + .of_match_table = of_match_ptr(qcom_qmp_phy_of_match_table), + }, +}; + +module_platform_driver(qcom_qmp_phy_driver); + +MODULE_AUTHOR("Vivek Gautam <vivek.gautam@xxxxxxxxxxxxxx>"); +MODULE_DESCRIPTION("Qualcomm QMP PHY driver"); +MODULE_LICENSE("GPL v2"); -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
