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phy-qcom-qmp.c
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/*
* Copyright (c) 2017, 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/clk-provider.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_address.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_POWER_DOWN_CONTROL 0x04
#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
/* QPHY_SW_RESET bit */
#define SW_RESET BIT(0)
/* QPHY_POWER_DOWN_CONTROL */
#define SW_PWRDN BIT(0)
#define REFCLK_DRV_DSBL BIT(1)
/* QPHY_START_CONTROL bits */
#define SERDES_START BIT(0)
#define PCS_START BIT(1)
#define PLL_READY_GATE_EN BIT(3)
/* QPHY_PCS_STATUS bit */
#define PHYSTATUS BIT(6)
/* QPHY_COM_PCS_READY_STATUS bit */
#define PCS_READY BIT(0)
#define PHY_INIT_COMPLETE_TIMEOUT 1000
#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 offset;
unsigned int val;
/*
* register part of layout ?
* if yes, then offset gives index in the reg-layout
*/
int in_layout;
};
#define QMP_PHY_INIT_CFG(o, v) \
{ \
.offset = o, \
.val = v, \
}
#define QMP_PHY_INIT_CFG_L(o, v) \
{ \
.offset = o, \
.val = v, \
.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_SW_RESET,
QPHY_START_CTRL,
QPHY_PCS_READY_STATUS,
};
static const 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_SW_RESET] = 0x00,
[QPHY_START_CTRL] = 0x08,
[QPHY_PCS_READY_STATUS] = 0x174,
};
static const 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_SW_RESET] = 0x00,
[QPHY_START_CTRL] = 0x08,
[QPHY_PCS_READY_STATUS] = 0x17c,
};
static const struct qmp_phy_init_tbl msm8996_pcie_serdes_tbl[] = {
QMP_PHY_INIT_CFG(QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x1c),
QMP_PHY_INIT_CFG(QSERDES_COM_CLK_ENABLE1, 0x10),
QMP_PHY_INIT_CFG(QSERDES_COM_CLK_SELECT, 0x33),
QMP_PHY_INIT_CFG(QSERDES_COM_CMN_CONFIG, 0x06),
QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP_EN, 0x42),
QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_MAP, 0x00),
QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_TIMER1, 0xff),
QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_TIMER2, 0x1f),
QMP_PHY_INIT_CFG(QSERDES_COM_HSCLK_SEL, 0x01),
QMP_PHY_INIT_CFG(QSERDES_COM_SVS_MODE_CLK_SEL, 0x01),
QMP_PHY_INIT_CFG(QSERDES_COM_CORE_CLK_EN, 0x00),
QMP_PHY_INIT_CFG(QSERDES_COM_CORECLK_DIV, 0x0a),
QMP_PHY_INIT_CFG(QSERDES_COM_BG_TIMER, 0x09),
QMP_PHY_INIT_CFG(QSERDES_COM_DEC_START_MODE0, 0x82),
QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START3_MODE0, 0x03),
QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START2_MODE0, 0x55),
QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START1_MODE0, 0x55),
QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP3_MODE0, 0x00),
QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP2_MODE0, 0x1a),
QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP1_MODE0, 0x0a),
QMP_PHY_INIT_CFG(QSERDES_COM_CLK_SELECT, 0x33),
QMP_PHY_INIT_CFG(QSERDES_COM_SYS_CLK_CTRL, 0x02),
QMP_PHY_INIT_CFG(QSERDES_COM_SYSCLK_BUF_ENABLE, 0x1f),
QMP_PHY_INIT_CFG(QSERDES_COM_SYSCLK_EN_SEL, 0x04),
QMP_PHY_INIT_CFG(QSERDES_COM_CP_CTRL_MODE0, 0x0b),
QMP_PHY_INIT_CFG(QSERDES_COM_PLL_RCTRL_MODE0, 0x16),
QMP_PHY_INIT_CFG(QSERDES_COM_PLL_CCTRL_MODE0, 0x28),
QMP_PHY_INIT_CFG(QSERDES_COM_INTEGLOOP_GAIN1_MODE0, 0x00),
QMP_PHY_INIT_CFG(QSERDES_COM_INTEGLOOP_GAIN0_MODE0, 0x80),
QMP_PHY_INIT_CFG(QSERDES_COM_SSC_EN_CENTER, 0x01),
QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER1, 0x31),
QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER2, 0x01),
QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER1, 0x02),
QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER2, 0x00),
QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE1, 0x2f),
QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE2, 0x19),
QMP_PHY_INIT_CFG(QSERDES_COM_RESCODE_DIV_NUM, 0x15),
QMP_PHY_INIT_CFG(QSERDES_COM_BG_TRIM, 0x0f),
QMP_PHY_INIT_CFG(QSERDES_COM_PLL_IVCO, 0x0f),
QMP_PHY_INIT_CFG(QSERDES_COM_CLK_EP_DIV, 0x19),
QMP_PHY_INIT_CFG(QSERDES_COM_CLK_ENABLE1, 0x10),
QMP_PHY_INIT_CFG(QSERDES_COM_HSCLK_SEL, 0x00),
QMP_PHY_INIT_CFG(QSERDES_COM_RESCODE_DIV_NUM, 0x40),
};
static const struct qmp_phy_init_tbl msm8996_pcie_tx_tbl[] = {
QMP_PHY_INIT_CFG(QSERDES_TX_HIGHZ_TRANSCEIVEREN_BIAS_DRVR_EN, 0x45),
QMP_PHY_INIT_CFG(QSERDES_TX_LANE_MODE, 0x06),
};
static const struct qmp_phy_init_tbl msm8996_pcie_rx_tbl[] = {
QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_ENABLES, 0x1c),
QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2, 0x01),
QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL3, 0x00),
QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL4, 0xdb),
QMP_PHY_INIT_CFG(QSERDES_RX_RX_BAND, 0x18),
QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_GAIN, 0x04),
QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_GAIN_HALF, 0x04),
QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_SATURATION_AND_ENABLE, 0x4b),
QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_DEGLITCH_CNTRL, 0x14),
QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_LVL, 0x19),
};
static const struct qmp_phy_init_tbl msm8996_pcie_pcs_tbl[] = {
QMP_PHY_INIT_CFG(QPHY_RX_IDLE_DTCT_CNTRL, 0x4c),
QMP_PHY_INIT_CFG(QPHY_PWRUP_RESET_DLY_TIME_AUXCLK, 0x00),
QMP_PHY_INIT_CFG(QPHY_LP_WAKEUP_DLY_TIME_AUXCLK, 0x01),
QMP_PHY_INIT_CFG_L(QPHY_PLL_LOCK_CHK_DLY_TIME, 0x05),
QMP_PHY_INIT_CFG(QPHY_ENDPOINT_REFCLK_DRIVE, 0x05),
QMP_PHY_INIT_CFG(QPHY_POWER_DOWN_CONTROL, 0x02),
QMP_PHY_INIT_CFG(QPHY_POWER_STATE_CONFIG4, 0x00),
QMP_PHY_INIT_CFG(QPHY_POWER_STATE_CONFIG1, 0xa3),
QMP_PHY_INIT_CFG(QPHY_TXDEEMPH_M3P5DB_V0, 0x0e),
};
static const struct qmp_phy_init_tbl msm8996_usb3_serdes_tbl[] = {
QMP_PHY_INIT_CFG(QSERDES_COM_SYSCLK_EN_SEL, 0x14),
QMP_PHY_INIT_CFG(QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x08),
QMP_PHY_INIT_CFG(QSERDES_COM_CLK_SELECT, 0x30),
QMP_PHY_INIT_CFG(QSERDES_COM_CMN_CONFIG, 0x06),
QMP_PHY_INIT_CFG(QSERDES_COM_SVS_MODE_CLK_SEL, 0x01),
QMP_PHY_INIT_CFG(QSERDES_COM_HSCLK_SEL, 0x00),
QMP_PHY_INIT_CFG(QSERDES_COM_BG_TRIM, 0x0f),
QMP_PHY_INIT_CFG(QSERDES_COM_PLL_IVCO, 0x0f),
QMP_PHY_INIT_CFG(QSERDES_COM_SYS_CLK_CTRL, 0x04),
/* PLL and Loop filter settings */
QMP_PHY_INIT_CFG(QSERDES_COM_DEC_START_MODE0, 0x82),
QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START1_MODE0, 0x55),
QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START2_MODE0, 0x55),
QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START3_MODE0, 0x03),
QMP_PHY_INIT_CFG(QSERDES_COM_CP_CTRL_MODE0, 0x0b),
QMP_PHY_INIT_CFG(QSERDES_COM_PLL_RCTRL_MODE0, 0x16),
QMP_PHY_INIT_CFG(QSERDES_COM_PLL_CCTRL_MODE0, 0x28),
QMP_PHY_INIT_CFG(QSERDES_COM_INTEGLOOP_GAIN0_MODE0, 0x80),
QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_CTRL, 0x00),
QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP1_MODE0, 0x15),
QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP2_MODE0, 0x34),
QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP3_MODE0, 0x00),
QMP_PHY_INIT_CFG(QSERDES_COM_CORE_CLK_EN, 0x00),
QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP_CFG, 0x00),
QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_MAP, 0x00),
QMP_PHY_INIT_CFG(QSERDES_COM_BG_TIMER, 0x0a),
/* SSC settings */
QMP_PHY_INIT_CFG(QSERDES_COM_SSC_EN_CENTER, 0x01),
QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER1, 0x31),
QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER2, 0x01),
QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER1, 0x00),
QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER2, 0x00),
QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE1, 0xde),
QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE2, 0x07),
};
static const struct qmp_phy_init_tbl msm8996_usb3_tx_tbl[] = {
QMP_PHY_INIT_CFG(QSERDES_TX_HIGHZ_TRANSCEIVEREN_BIAS_DRVR_EN, 0x45),
QMP_PHY_INIT_CFG(QSERDES_TX_RCV_DETECT_LVL_2, 0x12),
QMP_PHY_INIT_CFG(QSERDES_TX_LANE_MODE, 0x06),
};
static const struct qmp_phy_init_tbl msm8996_usb3_rx_tbl[] = {
QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_FASTLOCK_FO_GAIN, 0x0b),
QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_GAIN, 0x04),
QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2, 0x02),
QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL3, 0x4c),
QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL4, 0xbb),
QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQ_OFFSET_ADAPTOR_CNTRL1, 0x77),
QMP_PHY_INIT_CFG(QSERDES_RX_RX_OFFSET_ADAPTOR_CNTRL2, 0x80),
QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_CNTRL, 0x03),
QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_LVL, 0x18),
QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_DEGLITCH_CNTRL, 0x16),
};
static const struct qmp_phy_init_tbl msm8996_usb3_pcs_tbl[] = {
/* FLL settings */
QMP_PHY_INIT_CFG_L(QPHY_FLL_CNTRL2, 0x03),
QMP_PHY_INIT_CFG_L(QPHY_FLL_CNTRL1, 0x02),
QMP_PHY_INIT_CFG_L(QPHY_FLL_CNT_VAL_L, 0x09),
QMP_PHY_INIT_CFG_L(QPHY_FLL_CNT_VAL_H_TOL, 0x42),
QMP_PHY_INIT_CFG_L(QPHY_FLL_MAN_CODE, 0x85),
/* Lock Det settings */
QMP_PHY_INIT_CFG(QPHY_LOCK_DETECT_CONFIG1, 0xd1),
QMP_PHY_INIT_CFG(QPHY_LOCK_DETECT_CONFIG2, 0x1f),
QMP_PHY_INIT_CFG(QPHY_LOCK_DETECT_CONFIG3, 0x47),
QMP_PHY_INIT_CFG(QPHY_POWER_STATE_CONFIG2, 0x08),
};
/* struct qmp_phy_cfg - per-PHY initialization config */
struct qmp_phy_cfg {
/* phy-type - PCIE/UFS/USB */
unsigned int type;
/* number of lanes provided by phy */
int nlanes;
/* Init sequence for PHY blocks - serdes, tx, rx, pcs */
const struct qmp_phy_init_tbl *serdes_tbl;
int serdes_tbl_num;
const struct qmp_phy_init_tbl *tx_tbl;
int tx_tbl_num;
const struct qmp_phy_init_tbl *rx_tbl;
int rx_tbl_num;
const struct qmp_phy_init_tbl *pcs_tbl;
int pcs_tbl_num;
/* clock ids to be requested */
const char * const *clk_list;
int num_clks;
/* resets to be requested */
const char * const *reset_list;
int num_resets;
/* regulators to be requested */
const char * const *vreg_list;
int num_vregs;
/* array of registers with different offsets */
const unsigned int *regs;
unsigned int start_ctrl;
unsigned int pwrdn_ctrl;
unsigned int mask_pcs_ready;
unsigned int mask_com_pcs_ready;
/* true, if PHY has a separate PHY_COM control block */
bool has_phy_com_ctrl;
/* true, if PHY has a reset for individual lanes */
bool has_lane_rst;
/* true, if PHY needs delay after POWER_DOWN */
bool has_pwrdn_delay;
/* power_down delay in usec */
int pwrdn_delay_min;
int pwrdn_delay_max;
};
/**
* struct qmp_phy - per-lane phy descriptor
*
* @phy: generic phy
* @tx: iomapped memory space for lane's tx
* @rx: iomapped memory space for lane's rx
* @pcs: iomapped memory space for lane's pcs
* @pipe_clk: pipe lock
* @index: lane index
* @qmp: QMP phy to which this lane belongs
* @lane_rst: lane's reset controller
*/
struct qmp_phy {
struct phy *phy;
void __iomem *tx;
void __iomem *rx;
void __iomem *pcs;
struct clk *pipe_clk;
unsigned int index;
struct qcom_qmp *qmp;
struct reset_control *lane_rst;
};
/**
* struct qcom_qmp - structure holding QMP phy block attributes
*
* @dev: device
* @serdes: iomapped memory space for phy's serdes
*
* @clks: array of clocks required by phy
* @resets: array of resets required by phy
* @vregs: regulator supplies bulk data
*
* @cfg: phy specific configuration
* @phys: array of per-lane phy descriptors
* @phy_mutex: mutex lock for PHY common block initialization
* @init_count: phy common block initialization count
*/
struct qcom_qmp {
struct device *dev;
void __iomem *serdes;
struct clk **clks;
struct reset_control **resets;
struct regulator_bulk_data *vregs;
const struct qmp_phy_cfg *cfg;
struct qmp_phy **phys;
struct mutex phy_mutex;
int init_count;
};
static inline void qphy_setbits(void __iomem *base, u32 offset, u32 val)
{
u32 reg;
reg = readl(base + offset);
reg |= val;
writel(reg, base + offset);
/* ensure that above write is through */
readl(base + offset);
}
static inline void qphy_clrbits(void __iomem *base, u32 offset, u32 val)
{
u32 reg;
reg = readl(base + offset);
reg &= ~val;
writel(reg, base + offset);
/* ensure that above write is through */
readl(base + offset);
}
/* list of clocks required by phy */
static const char * const msm8996_phy_clk_l[] = {
"aux", "cfg_ahb", "ref",
};
/* list of resets */
static const char * const msm8996_pciephy_reset_l[] = {
"phy", "common", "cfg",
};
static const char * const msm8996_usb3phy_reset_l[] = {
"phy", "common",
};
/* list of regulators */
static const char * const msm8996_phy_vreg_l[] = {
"vdda-phy", "vdda-pll",
};
static const struct qmp_phy_cfg msm8996_pciephy_cfg = {
.type = PHY_TYPE_PCIE,
.nlanes = 3,
.serdes_tbl = msm8996_pcie_serdes_tbl,
.serdes_tbl_num = ARRAY_SIZE(msm8996_pcie_serdes_tbl),
.tx_tbl = msm8996_pcie_tx_tbl,
.tx_tbl_num = ARRAY_SIZE(msm8996_pcie_tx_tbl),
.rx_tbl = msm8996_pcie_rx_tbl,
.rx_tbl_num = ARRAY_SIZE(msm8996_pcie_rx_tbl),
.pcs_tbl = msm8996_pcie_pcs_tbl,
.pcs_tbl_num = ARRAY_SIZE(msm8996_pcie_pcs_tbl),
.clk_list = msm8996_phy_clk_l,
.num_clks = ARRAY_SIZE(msm8996_phy_clk_l),
.reset_list = msm8996_pciephy_reset_l,
.num_resets = ARRAY_SIZE(msm8996_pciephy_reset_l),
.vreg_list = msm8996_phy_vreg_l,
.num_vregs = ARRAY_SIZE(msm8996_phy_vreg_l),
.regs = pciephy_regs_layout,
.start_ctrl = PCS_START | PLL_READY_GATE_EN,
.pwrdn_ctrl = SW_PWRDN | REFCLK_DRV_DSBL,
.mask_com_pcs_ready = PCS_READY,
.has_phy_com_ctrl = true,
.has_lane_rst = true,
.has_pwrdn_delay = true,
.pwrdn_delay_min = POWER_DOWN_DELAY_US_MIN,
.pwrdn_delay_max = POWER_DOWN_DELAY_US_MAX,
};
static const struct qmp_phy_cfg msm8996_usb3phy_cfg = {
.type = PHY_TYPE_USB3,
.nlanes = 1,
.serdes_tbl = msm8996_usb3_serdes_tbl,
.serdes_tbl_num = ARRAY_SIZE(msm8996_usb3_serdes_tbl),
.tx_tbl = msm8996_usb3_tx_tbl,
.tx_tbl_num = ARRAY_SIZE(msm8996_usb3_tx_tbl),
.rx_tbl = msm8996_usb3_rx_tbl,
.rx_tbl_num = ARRAY_SIZE(msm8996_usb3_rx_tbl),
.pcs_tbl = msm8996_usb3_pcs_tbl,
.pcs_tbl_num = ARRAY_SIZE(msm8996_usb3_pcs_tbl),
.clk_list = msm8996_phy_clk_l,
.num_clks = ARRAY_SIZE(msm8996_phy_clk_l),
.reset_list = msm8996_usb3phy_reset_l,
.num_resets = ARRAY_SIZE(msm8996_usb3phy_reset_l),
.vreg_list = msm8996_phy_vreg_l,
.num_vregs = ARRAY_SIZE(msm8996_phy_vreg_l),
.regs = usb3phy_regs_layout,
.start_ctrl = SERDES_START | PCS_START,
.pwrdn_ctrl = SW_PWRDN,
.mask_pcs_ready = PHYSTATUS,
};
static void qcom_qmp_phy_configure(void __iomem *base,
const unsigned int *regs,
const struct qmp_phy_init_tbl tbl[],
int num)
{
int i;
const struct qmp_phy_init_tbl *t = tbl;
if (!t)
return;
for (i = 0; i < num; i++, t++) {
if (t->in_layout)
writel(t->val, base + regs[t->offset]);
else
writel(t->val, base + t->offset);
}
}
static int qcom_qmp_phy_poweron(struct phy *phy)
{
struct qmp_phy *qphy = phy_get_drvdata(phy);
struct qcom_qmp *qmp = qphy->qmp;
int num = qmp->cfg->num_vregs;
int ret;
dev_vdbg(&phy->dev, "Powering on QMP phy\n");
/* turn on regulator supplies */
ret = regulator_bulk_enable(num, qmp->vregs);
if (ret) {
dev_err(qmp->dev, "failed to enable regulators, err=%d\n", ret);
return ret;
}
ret = clk_prepare_enable(qphy->pipe_clk);
if (ret) {
dev_err(qmp->dev, "pipe_clk enable failed, err=%d\n", ret);
regulator_bulk_disable(num, qmp->vregs);
return ret;
}
return 0;
}
static int qcom_qmp_phy_poweroff(struct phy *phy)
{
struct qmp_phy *qphy = phy_get_drvdata(phy);
struct qcom_qmp *qmp = qphy->qmp;
clk_disable_unprepare(qphy->pipe_clk);
regulator_bulk_disable(qmp->cfg->num_vregs, qmp->vregs);
return 0;
}
static int qcom_qmp_phy_com_init(struct qcom_qmp *qmp)
{
const struct qmp_phy_cfg *cfg = qmp->cfg;
void __iomem *serdes = qmp->serdes;
int ret, i;
mutex_lock(&qmp->phy_mutex);
if (qmp->init_count++) {
mutex_unlock(&qmp->phy_mutex);
return 0;
}
for (i = 0; i < cfg->num_resets; i++) {
ret = reset_control_deassert(qmp->resets[i]);
if (ret) {
dev_err(qmp->dev, "%s reset deassert failed\n",
qmp->cfg->reset_list[i]);
while (--i >= 0)
reset_control_assert(qmp->resets[i]);
goto err_rst;
}
}
if (cfg->has_phy_com_ctrl)
qphy_setbits(serdes, cfg->regs[QPHY_COM_POWER_DOWN_CONTROL],
SW_PWRDN);
/* Serdes configuration */
qcom_qmp_phy_configure(serdes, cfg->regs, cfg->serdes_tbl,
cfg->serdes_tbl_num);
if (cfg->has_phy_com_ctrl) {
void __iomem *status;
unsigned int mask, val;
qphy_clrbits(serdes, cfg->regs[QPHY_COM_SW_RESET], SW_RESET);
qphy_setbits(serdes, cfg->regs[QPHY_COM_START_CONTROL],
SERDES_START | PCS_START);
status = serdes + cfg->regs[QPHY_COM_PCS_READY_STATUS];
mask = cfg->mask_com_pcs_ready;
ret = readl_poll_timeout(status, val, (val & mask), 10,
PHY_INIT_COMPLETE_TIMEOUT);
if (ret) {
dev_err(qmp->dev,
"phy common block init timed-out\n");
goto err_com_init;
}
}
mutex_unlock(&qmp->phy_mutex);
return 0;
err_com_init:
while (--i >= 0)
reset_control_assert(qmp->resets[i]);
err_rst:
mutex_unlock(&qmp->phy_mutex);
return ret;
}
static int qcom_qmp_phy_com_exit(struct qcom_qmp *qmp)
{
const struct qmp_phy_cfg *cfg = qmp->cfg;
void __iomem *serdes = qmp->serdes;
int i = cfg->num_resets;
mutex_lock(&qmp->phy_mutex);
if (--qmp->init_count) {
mutex_unlock(&qmp->phy_mutex);
return 0;
}
if (cfg->has_phy_com_ctrl) {
qphy_setbits(serdes, cfg->regs[QPHY_COM_START_CONTROL],
SERDES_START | PCS_START);
qphy_clrbits(serdes, cfg->regs[QPHY_COM_SW_RESET],
SW_RESET);
qphy_setbits(serdes, cfg->regs[QPHY_COM_POWER_DOWN_CONTROL],
SW_PWRDN);
}
while (--i >= 0)
reset_control_assert(qmp->resets[i]);
mutex_unlock(&qmp->phy_mutex);
return 0;
}
/* PHY Initialization */
static int qcom_qmp_phy_init(struct phy *phy)
{
struct qmp_phy *qphy = phy_get_drvdata(phy);
struct qcom_qmp *qmp = qphy->qmp;
const struct qmp_phy_cfg *cfg = qmp->cfg;
void __iomem *tx = qphy->tx;
void __iomem *rx = qphy->rx;
void __iomem *pcs = qphy->pcs;
void __iomem *status;
unsigned int mask, val;
int ret, i;
dev_vdbg(qmp->dev, "Initializing QMP phy\n");
for (i = 0; i < qmp->cfg->num_clks; i++) {
ret = clk_prepare_enable(qmp->clks[i]);
if (ret) {
dev_err(qmp->dev, "failed to enable %s clk, err=%d\n",
qmp->cfg->clk_list[i], ret);
while (--i >= 0)
clk_disable_unprepare(qmp->clks[i]);
}
}
ret = qcom_qmp_phy_com_init(qmp);
if (ret)
goto err_com_init;
if (cfg->has_lane_rst) {
ret = reset_control_deassert(qphy->lane_rst);
if (ret) {
dev_err(qmp->dev, "lane%d reset deassert failed\n",
qphy->index);
goto err_lane_rst;
}
}
/* Tx, Rx, and PCS configurations */
qcom_qmp_phy_configure(tx, cfg->regs, cfg->tx_tbl, cfg->tx_tbl_num);
qcom_qmp_phy_configure(rx, cfg->regs, cfg->rx_tbl, cfg->rx_tbl_num);
qcom_qmp_phy_configure(pcs, cfg->regs, cfg->pcs_tbl, cfg->pcs_tbl_num);
/*
* Pull out PHY from POWER DOWN state.
* This is active low enable signal to power-down PHY.
*/
qphy_setbits(pcs, QPHY_POWER_DOWN_CONTROL, cfg->pwrdn_ctrl);
if (cfg->has_pwrdn_delay)
usleep_range(cfg->pwrdn_delay_min, cfg->pwrdn_delay_max);
/* start SerDes and Phy-Coding-Sublayer */
qphy_setbits(pcs, cfg->regs[QPHY_START_CTRL], cfg->start_ctrl);
/* Pull PHY out of reset state */
qphy_clrbits(pcs, cfg->regs[QPHY_SW_RESET], SW_RESET);
status = pcs + cfg->regs[QPHY_PCS_READY_STATUS];
mask = cfg->mask_pcs_ready;
ret = readl_poll_timeout(status, val, !(val & mask), 1,
PHY_INIT_COMPLETE_TIMEOUT);
if (ret) {
dev_err(qmp->dev, "phy initialization timed-out\n");
goto err_pcs_ready;
}
return ret;
err_pcs_ready:
if (cfg->has_lane_rst)
reset_control_assert(qphy->lane_rst);
err_lane_rst:
qcom_qmp_phy_com_exit(qmp);
err_com_init:
while (--i >= 0)
clk_disable_unprepare(qmp->clks[i]);
return ret;
}
static int qcom_qmp_phy_exit(struct phy *phy)
{
struct qmp_phy *qphy = phy_get_drvdata(phy);
struct qcom_qmp *qmp = qphy->qmp;
const struct qmp_phy_cfg *cfg = qmp->cfg;
int i = cfg->num_clks;
/* PHY reset */
qphy_setbits(qphy->pcs, cfg->regs[QPHY_SW_RESET], SW_RESET);
/* stop SerDes and Phy-Coding-Sublayer */
qphy_clrbits(qphy->pcs, cfg->regs[QPHY_START_CTRL], cfg->start_ctrl);
/* Put PHY into POWER DOWN state: active low */
qphy_clrbits(qphy->pcs, QPHY_POWER_DOWN_CONTROL, cfg->pwrdn_ctrl);
if (cfg->has_lane_rst)
reset_control_assert(qphy->lane_rst);
qcom_qmp_phy_com_exit(qmp);
while (--i >= 0)
clk_disable_unprepare(qmp->clks[i]);
return 0;
}
static int qcom_qmp_phy_vreg_init(struct device *dev)
{
struct qcom_qmp *qmp = dev_get_drvdata(dev);
int num = qmp->cfg->num_vregs;
int i;
qmp->vregs = devm_kcalloc(dev, num, sizeof(*qmp->vregs), GFP_KERNEL);
if (!qmp->vregs)
return -ENOMEM;
for (i = 0; i < num; i++)
qmp->vregs[i].supply = qmp->cfg->vreg_list[i];
return devm_regulator_bulk_get(dev, num, qmp->vregs);
}
static int qcom_qmp_phy_reset_init(struct device *dev)
{
struct qcom_qmp *qmp = dev_get_drvdata(dev);
int i;
qmp->resets = devm_kcalloc(dev, qmp->cfg->num_resets,
sizeof(*qmp->resets), GFP_KERNEL);
if (!qmp->resets)
return -ENOMEM;
for (i = 0; i < qmp->cfg->num_resets; i++) {
struct reset_control *rst;
const char *name = qmp->cfg->reset_list[i];
rst = devm_reset_control_get(dev, name);
if (IS_ERR(rst)) {
dev_err(dev, "failed to get %s reset\n", name);
return PTR_ERR(rst);
}
qmp->resets[i] = rst;
}
return 0;
}
static int qcom_qmp_phy_clk_init(struct device *dev)
{
struct qcom_qmp *qmp = dev_get_drvdata(dev);
int ret, i;
qmp->clks = devm_kcalloc(dev, qmp->cfg->num_clks,
sizeof(*qmp->clks), GFP_KERNEL);
if (!qmp->clks)
return -ENOMEM;
for (i = 0; i < qmp->cfg->num_clks; i++) {
struct clk *_clk;
const char *name = qmp->cfg->clk_list[i];
_clk = devm_clk_get(dev, name);
if (IS_ERR(_clk)) {
ret = PTR_ERR(_clk);
if (ret != -EPROBE_DEFER)
dev_err(dev, "failed to get %s clk, %d\n",
name, ret);
return ret;
}
qmp->clks[i] = _clk;
}
return 0;
}
/*
* Register a fixed rate pipe clock.
*
* The <s>_pipe_clksrc generated by PHY goes to the GCC that gate
* controls it. The <s>_pipe_clk coming out of the GCC is requested
* by the PHY driver for its operations.
* We register the <s>_pipe_clksrc here. The gcc driver takes care
* of assigning this <s>_pipe_clksrc as parent to <s>_pipe_clk.
* Below picture shows this relationship.
*
* +---------------+
* | PHY block |<<---------------------------------------+
* | | |
* | +-------+ | +-----+ |
* I/P---^-->| PLL |---^--->pipe_clksrc--->| GCC |--->pipe_clk---+
* clk | +-------+ | +-----+
* +---------------+
*/
static int phy_pipe_clk_register(struct qcom_qmp *qmp, int id)
{
char name[24];
struct clk_fixed_rate *fixed;
struct clk_init_data init = { };
switch (qmp->cfg->type) {
case PHY_TYPE_USB3:
snprintf(name, sizeof(name), "usb3_phy_pipe_clk_src");
break;
case PHY_TYPE_PCIE:
snprintf(name, sizeof(name), "pcie_%d_pipe_clk_src", id);
break;
default:
/* not all phys register pipe clocks, so return success */
return 0;
}
fixed = devm_kzalloc(qmp->dev, sizeof(*fixed), GFP_KERNEL);
if (!fixed)
return -ENOMEM;
init.name = name;
init.ops = &clk_fixed_rate_ops;
/* controllers using QMP phys use 125MHz pipe clock interface */
fixed->fixed_rate = 125000000;
fixed->hw.init = &init;
return devm_clk_hw_register(qmp->dev, &fixed->hw);
}
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
int qcom_qmp_phy_create(struct device *dev, struct device_node *np, int id)
{
struct qcom_qmp *qmp = dev_get_drvdata(dev);
struct phy *generic_phy;
struct qmp_phy *qphy;
char prop_name[MAX_PROP_NAME];
int ret;
qphy = devm_kzalloc(dev, sizeof(*qphy), GFP_KERNEL);
if (!qphy)
return -ENOMEM;
/*
* Get memory resources for each phy lane:
* Resources are indexed as: tx -> 0; rx -> 1; pcs -> 2.
*/
qphy->tx = of_iomap(np, 0);
if (!qphy->tx)
return -ENOMEM;
qphy->rx = of_iomap(np, 1);
if (!qphy->rx)
return -ENOMEM;
qphy->pcs = of_iomap(np, 2);
if (!qphy->pcs)
return -ENOMEM;
/*
* Get PHY's Pipe clock, if any. USB3 and PCIe are PIPE3
* based phys, so they essentially have pipe clock. So,
* we return error in case phy is USB3 or PIPE type.