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1003 lines
27 KiB
1003 lines
27 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (c) 2017, 2019, The Linux Foundation. All rights reserved. |
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*/ |
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#include <linux/clk.h> |
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#include <linux/delay.h> |
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#include <linux/err.h> |
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#include <linux/io.h> |
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#include <linux/kernel.h> |
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#include <linux/mfd/syscon.h> |
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#include <linux/module.h> |
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#include <linux/nvmem-consumer.h> |
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#include <linux/of.h> |
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#include <linux/of_device.h> |
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#include <linux/phy/phy.h> |
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#include <linux/platform_device.h> |
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#include <linux/regmap.h> |
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#include <linux/regulator/consumer.h> |
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#include <linux/reset.h> |
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#include <linux/slab.h> |
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#include <dt-bindings/phy/phy-qcom-qusb2.h> |
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#define QUSB2PHY_PLL_TEST 0x04 |
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#define CLK_REF_SEL BIT(7) |
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#define QUSB2PHY_PLL_TUNE 0x08 |
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#define QUSB2PHY_PLL_USER_CTL1 0x0c |
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#define QUSB2PHY_PLL_USER_CTL2 0x10 |
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#define QUSB2PHY_PLL_AUTOPGM_CTL1 0x1c |
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#define QUSB2PHY_PLL_PWR_CTRL 0x18 |
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/* QUSB2PHY_PLL_STATUS register bits */ |
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#define PLL_LOCKED BIT(5) |
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/* QUSB2PHY_PLL_COMMON_STATUS_ONE register bits */ |
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#define CORE_READY_STATUS BIT(0) |
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/* QUSB2PHY_PORT_POWERDOWN register bits */ |
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#define CLAMP_N_EN BIT(5) |
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#define FREEZIO_N BIT(1) |
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#define POWER_DOWN BIT(0) |
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/* QUSB2PHY_PWR_CTRL1 register bits */ |
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#define PWR_CTRL1_VREF_SUPPLY_TRIM BIT(5) |
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#define PWR_CTRL1_CLAMP_N_EN BIT(1) |
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#define QUSB2PHY_REFCLK_ENABLE BIT(0) |
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#define PHY_CLK_SCHEME_SEL BIT(0) |
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/* QUSB2PHY_INTR_CTRL register bits */ |
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#define DMSE_INTR_HIGH_SEL BIT(4) |
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#define DPSE_INTR_HIGH_SEL BIT(3) |
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#define CHG_DET_INTR_EN BIT(2) |
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#define DMSE_INTR_EN BIT(1) |
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#define DPSE_INTR_EN BIT(0) |
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/* QUSB2PHY_PLL_CORE_INPUT_OVERRIDE register bits */ |
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#define CORE_PLL_EN_FROM_RESET BIT(4) |
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#define CORE_RESET BIT(5) |
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#define CORE_RESET_MUX BIT(6) |
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/* QUSB2PHY_IMP_CTRL1 register bits */ |
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#define IMP_RES_OFFSET_MASK GENMASK(5, 0) |
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#define IMP_RES_OFFSET_SHIFT 0x0 |
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/* QUSB2PHY_PLL_BIAS_CONTROL_2 register bits */ |
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#define BIAS_CTRL2_RES_OFFSET_MASK GENMASK(5, 0) |
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#define BIAS_CTRL2_RES_OFFSET_SHIFT 0x0 |
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/* QUSB2PHY_CHG_CONTROL_2 register bits */ |
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#define CHG_CTRL2_OFFSET_MASK GENMASK(5, 4) |
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#define CHG_CTRL2_OFFSET_SHIFT 0x4 |
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/* QUSB2PHY_PORT_TUNE1 register bits */ |
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#define HSTX_TRIM_MASK GENMASK(7, 4) |
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#define HSTX_TRIM_SHIFT 0x4 |
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#define PREEMPH_WIDTH_HALF_BIT BIT(2) |
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#define PREEMPHASIS_EN_MASK GENMASK(1, 0) |
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#define PREEMPHASIS_EN_SHIFT 0x0 |
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/* QUSB2PHY_PORT_TUNE2 register bits */ |
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#define HSDISC_TRIM_MASK GENMASK(1, 0) |
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#define HSDISC_TRIM_SHIFT 0x0 |
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#define QUSB2PHY_PLL_ANALOG_CONTROLS_TWO 0x04 |
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#define QUSB2PHY_PLL_CLOCK_INVERTERS 0x18c |
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#define QUSB2PHY_PLL_CMODE 0x2c |
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#define QUSB2PHY_PLL_LOCK_DELAY 0x184 |
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#define QUSB2PHY_PLL_DIGITAL_TIMERS_TWO 0xb4 |
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#define QUSB2PHY_PLL_BIAS_CONTROL_1 0x194 |
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#define QUSB2PHY_PLL_BIAS_CONTROL_2 0x198 |
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#define QUSB2PHY_PWR_CTRL2 0x214 |
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#define QUSB2PHY_IMP_CTRL1 0x220 |
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#define QUSB2PHY_IMP_CTRL2 0x224 |
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#define QUSB2PHY_CHG_CTRL2 0x23c |
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struct qusb2_phy_init_tbl { |
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unsigned int offset; |
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unsigned int val; |
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/* |
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* register part of layout ? |
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* if yes, then offset gives index in the reg-layout |
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*/ |
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int in_layout; |
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}; |
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#define QUSB2_PHY_INIT_CFG(o, v) \ |
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{ \ |
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.offset = o, \ |
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.val = v, \ |
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} |
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#define QUSB2_PHY_INIT_CFG_L(o, v) \ |
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{ \ |
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.offset = o, \ |
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.val = v, \ |
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.in_layout = 1, \ |
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} |
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/* set of registers with offsets different per-PHY */ |
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enum qusb2phy_reg_layout { |
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QUSB2PHY_PLL_CORE_INPUT_OVERRIDE, |
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QUSB2PHY_PLL_STATUS, |
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QUSB2PHY_PORT_TUNE1, |
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QUSB2PHY_PORT_TUNE2, |
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QUSB2PHY_PORT_TUNE3, |
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QUSB2PHY_PORT_TUNE4, |
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QUSB2PHY_PORT_TUNE5, |
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QUSB2PHY_PORT_TEST1, |
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QUSB2PHY_PORT_TEST2, |
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QUSB2PHY_PORT_POWERDOWN, |
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QUSB2PHY_INTR_CTRL, |
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}; |
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static const unsigned int msm8996_regs_layout[] = { |
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[QUSB2PHY_PLL_STATUS] = 0x38, |
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[QUSB2PHY_PORT_TUNE1] = 0x80, |
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[QUSB2PHY_PORT_TUNE2] = 0x84, |
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[QUSB2PHY_PORT_TUNE3] = 0x88, |
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[QUSB2PHY_PORT_TUNE4] = 0x8c, |
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[QUSB2PHY_PORT_TUNE5] = 0x90, |
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[QUSB2PHY_PORT_TEST1] = 0xb8, |
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[QUSB2PHY_PORT_TEST2] = 0x9c, |
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[QUSB2PHY_PORT_POWERDOWN] = 0xb4, |
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[QUSB2PHY_INTR_CTRL] = 0xbc, |
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}; |
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static const struct qusb2_phy_init_tbl msm8996_init_tbl[] = { |
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QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE1, 0xf8), |
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QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE2, 0xb3), |
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QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE3, 0x83), |
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QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE4, 0xc0), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_TUNE, 0x30), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_USER_CTL1, 0x79), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_USER_CTL2, 0x21), |
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QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TEST2, 0x14), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_AUTOPGM_CTL1, 0x9f), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_PWR_CTRL, 0x00), |
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}; |
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static const unsigned int msm8998_regs_layout[] = { |
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[QUSB2PHY_PLL_CORE_INPUT_OVERRIDE] = 0xa8, |
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[QUSB2PHY_PLL_STATUS] = 0x1a0, |
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[QUSB2PHY_PORT_TUNE1] = 0x23c, |
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[QUSB2PHY_PORT_TUNE2] = 0x240, |
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[QUSB2PHY_PORT_TUNE3] = 0x244, |
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[QUSB2PHY_PORT_TUNE4] = 0x248, |
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[QUSB2PHY_PORT_TEST1] = 0x24c, |
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[QUSB2PHY_PORT_TEST2] = 0x250, |
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[QUSB2PHY_PORT_POWERDOWN] = 0x210, |
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[QUSB2PHY_INTR_CTRL] = 0x22c, |
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}; |
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static const struct qusb2_phy_init_tbl msm8998_init_tbl[] = { |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_ANALOG_CONTROLS_TWO, 0x13), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_CLOCK_INVERTERS, 0x7c), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_CMODE, 0x80), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_LOCK_DELAY, 0x0a), |
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QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE1, 0xa5), |
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QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE2, 0x09), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_DIGITAL_TIMERS_TWO, 0x19), |
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}; |
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static const unsigned int qusb2_v2_regs_layout[] = { |
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[QUSB2PHY_PLL_CORE_INPUT_OVERRIDE] = 0xa8, |
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[QUSB2PHY_PLL_STATUS] = 0x1a0, |
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[QUSB2PHY_PORT_TUNE1] = 0x240, |
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[QUSB2PHY_PORT_TUNE2] = 0x244, |
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[QUSB2PHY_PORT_TUNE3] = 0x248, |
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[QUSB2PHY_PORT_TUNE4] = 0x24c, |
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[QUSB2PHY_PORT_TUNE5] = 0x250, |
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[QUSB2PHY_PORT_TEST1] = 0x254, |
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[QUSB2PHY_PORT_TEST2] = 0x258, |
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[QUSB2PHY_PORT_POWERDOWN] = 0x210, |
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[QUSB2PHY_INTR_CTRL] = 0x230, |
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}; |
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static const struct qusb2_phy_init_tbl qusb2_v2_init_tbl[] = { |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_ANALOG_CONTROLS_TWO, 0x03), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_CLOCK_INVERTERS, 0x7c), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_CMODE, 0x80), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_LOCK_DELAY, 0x0a), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_DIGITAL_TIMERS_TWO, 0x19), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_BIAS_CONTROL_1, 0x40), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_BIAS_CONTROL_2, 0x20), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_PWR_CTRL2, 0x21), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_IMP_CTRL1, 0x0), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_IMP_CTRL2, 0x58), |
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QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE1, 0x30), |
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QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE2, 0x29), |
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QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE3, 0xca), |
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QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE4, 0x04), |
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QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE5, 0x03), |
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QUSB2_PHY_INIT_CFG(QUSB2PHY_CHG_CTRL2, 0x0), |
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}; |
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struct qusb2_phy_cfg { |
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const struct qusb2_phy_init_tbl *tbl; |
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/* number of entries in the table */ |
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unsigned int tbl_num; |
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/* offset to PHY_CLK_SCHEME register in TCSR map */ |
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unsigned int clk_scheme_offset; |
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/* array of registers with different offsets */ |
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const unsigned int *regs; |
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unsigned int mask_core_ready; |
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unsigned int disable_ctrl; |
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unsigned int autoresume_en; |
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/* true if PHY has PLL_TEST register to select clk_scheme */ |
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bool has_pll_test; |
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/* true if TUNE1 register must be updated by fused value, else TUNE2 */ |
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bool update_tune1_with_efuse; |
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/* true if PHY has PLL_CORE_INPUT_OVERRIDE register to reset PLL */ |
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bool has_pll_override; |
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}; |
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static const struct qusb2_phy_cfg msm8996_phy_cfg = { |
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.tbl = msm8996_init_tbl, |
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.tbl_num = ARRAY_SIZE(msm8996_init_tbl), |
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.regs = msm8996_regs_layout, |
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.has_pll_test = true, |
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.disable_ctrl = (CLAMP_N_EN | FREEZIO_N | POWER_DOWN), |
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.mask_core_ready = PLL_LOCKED, |
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.autoresume_en = BIT(3), |
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}; |
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static const struct qusb2_phy_cfg msm8998_phy_cfg = { |
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.tbl = msm8998_init_tbl, |
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.tbl_num = ARRAY_SIZE(msm8998_init_tbl), |
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.regs = msm8998_regs_layout, |
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.disable_ctrl = POWER_DOWN, |
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.mask_core_ready = CORE_READY_STATUS, |
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.has_pll_override = true, |
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.autoresume_en = BIT(0), |
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.update_tune1_with_efuse = true, |
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}; |
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static const struct qusb2_phy_cfg qusb2_v2_phy_cfg = { |
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.tbl = qusb2_v2_init_tbl, |
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.tbl_num = ARRAY_SIZE(qusb2_v2_init_tbl), |
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.regs = qusb2_v2_regs_layout, |
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.disable_ctrl = (PWR_CTRL1_VREF_SUPPLY_TRIM | PWR_CTRL1_CLAMP_N_EN | |
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POWER_DOWN), |
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.mask_core_ready = CORE_READY_STATUS, |
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.has_pll_override = true, |
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.autoresume_en = BIT(0), |
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.update_tune1_with_efuse = true, |
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}; |
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static const char * const qusb2_phy_vreg_names[] = { |
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"vdda-pll", "vdda-phy-dpdm", |
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}; |
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#define QUSB2_NUM_VREGS ARRAY_SIZE(qusb2_phy_vreg_names) |
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/* struct override_param - structure holding qusb2 v2 phy overriding param |
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* set override true if the device tree property exists and read and assign |
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* to value |
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*/ |
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struct override_param { |
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bool override; |
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u8 value; |
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}; |
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/*struct override_params - structure holding qusb2 v2 phy overriding params |
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* @imp_res_offset: rescode offset to be updated in IMP_CTRL1 register |
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* @hstx_trim: HSTX_TRIM to be updated in TUNE1 register |
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* @preemphasis: Amplitude Pre-Emphasis to be updated in TUNE1 register |
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* @preemphasis_width: half/full-width Pre-Emphasis updated via TUNE1 |
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* @bias_ctrl: bias ctrl to be updated in BIAS_CONTROL_2 register |
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* @charge_ctrl: charge ctrl to be updated in CHG_CTRL2 register |
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* @hsdisc_trim: disconnect threshold to be updated in TUNE2 register |
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*/ |
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struct override_params { |
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struct override_param imp_res_offset; |
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struct override_param hstx_trim; |
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struct override_param preemphasis; |
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struct override_param preemphasis_width; |
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struct override_param bias_ctrl; |
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struct override_param charge_ctrl; |
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struct override_param hsdisc_trim; |
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}; |
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/** |
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* struct qusb2_phy - structure holding qusb2 phy attributes |
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* |
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* @phy: generic phy |
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* @base: iomapped memory space for qubs2 phy |
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* |
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* @cfg_ahb_clk: AHB2PHY interface clock |
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* @ref_clk: phy reference clock |
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* @iface_clk: phy interface clock |
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* @phy_reset: phy reset control |
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* @vregs: regulator supplies bulk data |
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* |
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* @tcsr: TCSR syscon register map |
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* @cell: nvmem cell containing phy tuning value |
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* |
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* @overrides: pointer to structure for all overriding tuning params |
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* |
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* @cfg: phy config data |
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* @has_se_clk_scheme: indicate if PHY has single-ended ref clock scheme |
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* @phy_initialized: indicate if PHY has been initialized |
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* @mode: current PHY mode |
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*/ |
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struct qusb2_phy { |
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struct phy *phy; |
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void __iomem *base; |
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struct clk *cfg_ahb_clk; |
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struct clk *ref_clk; |
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struct clk *iface_clk; |
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struct reset_control *phy_reset; |
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struct regulator_bulk_data vregs[QUSB2_NUM_VREGS]; |
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struct regmap *tcsr; |
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struct nvmem_cell *cell; |
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struct override_params overrides; |
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const struct qusb2_phy_cfg *cfg; |
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bool has_se_clk_scheme; |
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bool phy_initialized; |
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enum phy_mode mode; |
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}; |
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static inline void qusb2_write_mask(void __iomem *base, u32 offset, |
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u32 val, u32 mask) |
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{ |
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u32 reg; |
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reg = readl(base + offset); |
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reg &= ~mask; |
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reg |= val & mask; |
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writel(reg, base + offset); |
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/* Ensure above write is completed */ |
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readl(base + offset); |
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} |
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static inline void qusb2_setbits(void __iomem *base, u32 offset, u32 val) |
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{ |
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u32 reg; |
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reg = readl(base + offset); |
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reg |= val; |
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writel(reg, base + offset); |
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/* Ensure above write is completed */ |
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readl(base + offset); |
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} |
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static inline void qusb2_clrbits(void __iomem *base, u32 offset, u32 val) |
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{ |
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u32 reg; |
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reg = readl(base + offset); |
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reg &= ~val; |
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writel(reg, base + offset); |
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/* Ensure above write is completed */ |
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readl(base + offset); |
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} |
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static inline |
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void qcom_qusb2_phy_configure(void __iomem *base, |
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const unsigned int *regs, |
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const struct qusb2_phy_init_tbl tbl[], int num) |
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{ |
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int i; |
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for (i = 0; i < num; i++) { |
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if (tbl[i].in_layout) |
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writel(tbl[i].val, base + regs[tbl[i].offset]); |
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else |
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writel(tbl[i].val, base + tbl[i].offset); |
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} |
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} |
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/* |
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* Update board specific PHY tuning override values if specified from |
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* device tree. |
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*/ |
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static void qusb2_phy_override_phy_params(struct qusb2_phy *qphy) |
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{ |
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const struct qusb2_phy_cfg *cfg = qphy->cfg; |
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struct override_params *or = &qphy->overrides; |
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if (or->imp_res_offset.override) |
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qusb2_write_mask(qphy->base, QUSB2PHY_IMP_CTRL1, |
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or->imp_res_offset.value << IMP_RES_OFFSET_SHIFT, |
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IMP_RES_OFFSET_MASK); |
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if (or->bias_ctrl.override) |
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qusb2_write_mask(qphy->base, QUSB2PHY_PLL_BIAS_CONTROL_2, |
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or->bias_ctrl.value << BIAS_CTRL2_RES_OFFSET_SHIFT, |
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BIAS_CTRL2_RES_OFFSET_MASK); |
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|
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if (or->charge_ctrl.override) |
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qusb2_write_mask(qphy->base, QUSB2PHY_CHG_CTRL2, |
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or->charge_ctrl.value << CHG_CTRL2_OFFSET_SHIFT, |
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CHG_CTRL2_OFFSET_MASK); |
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|
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if (or->hstx_trim.override) |
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qusb2_write_mask(qphy->base, cfg->regs[QUSB2PHY_PORT_TUNE1], |
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or->hstx_trim.value << HSTX_TRIM_SHIFT, |
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HSTX_TRIM_MASK); |
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|
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if (or->preemphasis.override) |
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qusb2_write_mask(qphy->base, cfg->regs[QUSB2PHY_PORT_TUNE1], |
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or->preemphasis.value << PREEMPHASIS_EN_SHIFT, |
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PREEMPHASIS_EN_MASK); |
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|
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if (or->preemphasis_width.override) { |
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if (or->preemphasis_width.value == |
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QUSB2_V2_PREEMPHASIS_WIDTH_HALF_BIT) |
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qusb2_setbits(qphy->base, |
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cfg->regs[QUSB2PHY_PORT_TUNE1], |
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PREEMPH_WIDTH_HALF_BIT); |
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else |
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qusb2_clrbits(qphy->base, |
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cfg->regs[QUSB2PHY_PORT_TUNE1], |
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PREEMPH_WIDTH_HALF_BIT); |
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} |
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|
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if (or->hsdisc_trim.override) |
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qusb2_write_mask(qphy->base, cfg->regs[QUSB2PHY_PORT_TUNE2], |
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or->hsdisc_trim.value << HSDISC_TRIM_SHIFT, |
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HSDISC_TRIM_MASK); |
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} |
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|
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/* |
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* Fetches HS Tx tuning value from nvmem and sets the |
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* QUSB2PHY_PORT_TUNE1/2 register. |
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* For error case, skip setting the value and use the default value. |
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*/ |
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static void qusb2_phy_set_tune2_param(struct qusb2_phy *qphy) |
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{ |
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struct device *dev = &qphy->phy->dev; |
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const struct qusb2_phy_cfg *cfg = qphy->cfg; |
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u8 *val; |
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|
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/* efuse register is optional */ |
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if (!qphy->cell) |
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return; |
|
|
|
/* |
|
* Read efuse register having TUNE2/1 parameter's high nibble. |
|
* If efuse register shows value as 0x0 (indicating value is not |
|
* fused), or if we fail to find a valid efuse register setting, |
|
* then use default value for high nibble that we have already |
|
* set while configuring the phy. |
|
*/ |
|
val = nvmem_cell_read(qphy->cell, NULL); |
|
if (IS_ERR(val) || !val[0]) { |
|
dev_dbg(dev, "failed to read a valid hs-tx trim value\n"); |
|
return; |
|
} |
|
|
|
/* Fused TUNE1/2 value is the higher nibble only */ |
|
if (cfg->update_tune1_with_efuse) |
|
qusb2_write_mask(qphy->base, cfg->regs[QUSB2PHY_PORT_TUNE1], |
|
val[0] << HSTX_TRIM_SHIFT, |
|
HSTX_TRIM_MASK); |
|
else |
|
qusb2_write_mask(qphy->base, cfg->regs[QUSB2PHY_PORT_TUNE2], |
|
val[0] << HSTX_TRIM_SHIFT, |
|
HSTX_TRIM_MASK); |
|
} |
|
|
|
static int qusb2_phy_set_mode(struct phy *phy, |
|
enum phy_mode mode, int submode) |
|
{ |
|
struct qusb2_phy *qphy = phy_get_drvdata(phy); |
|
|
|
qphy->mode = mode; |
|
|
|
return 0; |
|
} |
|
|
|
static int __maybe_unused qusb2_phy_runtime_suspend(struct device *dev) |
|
{ |
|
struct qusb2_phy *qphy = dev_get_drvdata(dev); |
|
const struct qusb2_phy_cfg *cfg = qphy->cfg; |
|
u32 intr_mask; |
|
|
|
dev_vdbg(dev, "Suspending QUSB2 Phy, mode:%d\n", qphy->mode); |
|
|
|
if (!qphy->phy_initialized) { |
|
dev_vdbg(dev, "PHY not initialized, bailing out\n"); |
|
return 0; |
|
} |
|
|
|
/* |
|
* Enable DP/DM interrupts to detect line state changes based on current |
|
* speed. In other words, enable the triggers _opposite_ of what the |
|
* current D+/D- levels are e.g. if currently D+ high, D- low |
|
* (HS 'J'/Suspend), configure the mask to trigger on D+ low OR D- high |
|
*/ |
|
intr_mask = DPSE_INTR_EN | DMSE_INTR_EN; |
|
switch (qphy->mode) { |
|
case PHY_MODE_USB_HOST_HS: |
|
case PHY_MODE_USB_HOST_FS: |
|
case PHY_MODE_USB_DEVICE_HS: |
|
case PHY_MODE_USB_DEVICE_FS: |
|
intr_mask |= DMSE_INTR_HIGH_SEL; |
|
break; |
|
case PHY_MODE_USB_HOST_LS: |
|
case PHY_MODE_USB_DEVICE_LS: |
|
intr_mask |= DPSE_INTR_HIGH_SEL; |
|
break; |
|
default: |
|
/* No device connected, enable both DP/DM high interrupt */ |
|
intr_mask |= DMSE_INTR_HIGH_SEL; |
|
intr_mask |= DPSE_INTR_HIGH_SEL; |
|
break; |
|
} |
|
|
|
writel(intr_mask, qphy->base + cfg->regs[QUSB2PHY_INTR_CTRL]); |
|
|
|
/* hold core PLL into reset */ |
|
if (cfg->has_pll_override) { |
|
qusb2_setbits(qphy->base, |
|
cfg->regs[QUSB2PHY_PLL_CORE_INPUT_OVERRIDE], |
|
CORE_PLL_EN_FROM_RESET | CORE_RESET | |
|
CORE_RESET_MUX); |
|
} |
|
|
|
/* enable phy auto-resume only if device is connected on bus */ |
|
if (qphy->mode != PHY_MODE_INVALID) { |
|
qusb2_setbits(qphy->base, cfg->regs[QUSB2PHY_PORT_TEST1], |
|
cfg->autoresume_en); |
|
/* Autoresume bit has to be toggled in order to enable it */ |
|
qusb2_clrbits(qphy->base, cfg->regs[QUSB2PHY_PORT_TEST1], |
|
cfg->autoresume_en); |
|
} |
|
|
|
if (!qphy->has_se_clk_scheme) |
|
clk_disable_unprepare(qphy->ref_clk); |
|
|
|
clk_disable_unprepare(qphy->cfg_ahb_clk); |
|
clk_disable_unprepare(qphy->iface_clk); |
|
|
|
return 0; |
|
} |
|
|
|
static int __maybe_unused qusb2_phy_runtime_resume(struct device *dev) |
|
{ |
|
struct qusb2_phy *qphy = dev_get_drvdata(dev); |
|
const struct qusb2_phy_cfg *cfg = qphy->cfg; |
|
int ret; |
|
|
|
dev_vdbg(dev, "Resuming QUSB2 phy, mode:%d\n", qphy->mode); |
|
|
|
if (!qphy->phy_initialized) { |
|
dev_vdbg(dev, "PHY not initialized, bailing out\n"); |
|
return 0; |
|
} |
|
|
|
ret = clk_prepare_enable(qphy->iface_clk); |
|
if (ret) { |
|
dev_err(dev, "failed to enable iface_clk, %d\n", ret); |
|
return ret; |
|
} |
|
|
|
ret = clk_prepare_enable(qphy->cfg_ahb_clk); |
|
if (ret) { |
|
dev_err(dev, "failed to enable cfg ahb clock, %d\n", ret); |
|
goto disable_iface_clk; |
|
} |
|
|
|
if (!qphy->has_se_clk_scheme) { |
|
ret = clk_prepare_enable(qphy->ref_clk); |
|
if (ret) { |
|
dev_err(dev, "failed to enable ref clk, %d\n", ret); |
|
goto disable_ahb_clk; |
|
} |
|
} |
|
|
|
writel(0x0, qphy->base + cfg->regs[QUSB2PHY_INTR_CTRL]); |
|
|
|
/* bring core PLL out of reset */ |
|
if (cfg->has_pll_override) { |
|
qusb2_clrbits(qphy->base, |
|
cfg->regs[QUSB2PHY_PLL_CORE_INPUT_OVERRIDE], |
|
CORE_RESET | CORE_RESET_MUX); |
|
} |
|
|
|
return 0; |
|
|
|
disable_ahb_clk: |
|
clk_disable_unprepare(qphy->cfg_ahb_clk); |
|
disable_iface_clk: |
|
clk_disable_unprepare(qphy->iface_clk); |
|
|
|
return ret; |
|
} |
|
|
|
static int qusb2_phy_init(struct phy *phy) |
|
{ |
|
struct qusb2_phy *qphy = phy_get_drvdata(phy); |
|
const struct qusb2_phy_cfg *cfg = qphy->cfg; |
|
unsigned int val = 0; |
|
unsigned int clk_scheme; |
|
int ret; |
|
|
|
dev_vdbg(&phy->dev, "%s(): Initializing QUSB2 phy\n", __func__); |
|
|
|
/* turn on regulator supplies */ |
|
ret = regulator_bulk_enable(ARRAY_SIZE(qphy->vregs), qphy->vregs); |
|
if (ret) |
|
return ret; |
|
|
|
ret = clk_prepare_enable(qphy->iface_clk); |
|
if (ret) { |
|
dev_err(&phy->dev, "failed to enable iface_clk, %d\n", ret); |
|
goto poweroff_phy; |
|
} |
|
|
|
/* enable ahb interface clock to program phy */ |
|
ret = clk_prepare_enable(qphy->cfg_ahb_clk); |
|
if (ret) { |
|
dev_err(&phy->dev, "failed to enable cfg ahb clock, %d\n", ret); |
|
goto disable_iface_clk; |
|
} |
|
|
|
/* Perform phy reset */ |
|
ret = reset_control_assert(qphy->phy_reset); |
|
if (ret) { |
|
dev_err(&phy->dev, "failed to assert phy_reset, %d\n", ret); |
|
goto disable_ahb_clk; |
|
} |
|
|
|
/* 100 us delay to keep PHY in reset mode */ |
|
usleep_range(100, 150); |
|
|
|
ret = reset_control_deassert(qphy->phy_reset); |
|
if (ret) { |
|
dev_err(&phy->dev, "failed to de-assert phy_reset, %d\n", ret); |
|
goto disable_ahb_clk; |
|
} |
|
|
|
/* Disable the PHY */ |
|
qusb2_setbits(qphy->base, cfg->regs[QUSB2PHY_PORT_POWERDOWN], |
|
qphy->cfg->disable_ctrl); |
|
|
|
if (cfg->has_pll_test) { |
|
/* save reset value to override reference clock scheme later */ |
|
val = readl(qphy->base + QUSB2PHY_PLL_TEST); |
|
} |
|
|
|
qcom_qusb2_phy_configure(qphy->base, cfg->regs, cfg->tbl, |
|
cfg->tbl_num); |
|
|
|
/* Override board specific PHY tuning values */ |
|
qusb2_phy_override_phy_params(qphy); |
|
|
|
/* Set efuse value for tuning the PHY */ |
|
qusb2_phy_set_tune2_param(qphy); |
|
|
|
/* Enable the PHY */ |
|
qusb2_clrbits(qphy->base, cfg->regs[QUSB2PHY_PORT_POWERDOWN], |
|
POWER_DOWN); |
|
|
|
/* Required to get phy pll lock successfully */ |
|
usleep_range(150, 160); |
|
|
|
/* Default is single-ended clock on msm8996 */ |
|
qphy->has_se_clk_scheme = true; |
|
/* |
|
* read TCSR_PHY_CLK_SCHEME register to check if single-ended |
|
* clock scheme is selected. If yes, then disable differential |
|
* ref_clk and use single-ended clock, otherwise use differential |
|
* ref_clk only. |
|
*/ |
|
if (qphy->tcsr) { |
|
ret = regmap_read(qphy->tcsr, qphy->cfg->clk_scheme_offset, |
|
&clk_scheme); |
|
if (ret) { |
|
dev_err(&phy->dev, "failed to read clk scheme reg\n"); |
|
goto assert_phy_reset; |
|
} |
|
|
|
/* is it a differential clock scheme ? */ |
|
if (!(clk_scheme & PHY_CLK_SCHEME_SEL)) { |
|
dev_vdbg(&phy->dev, "%s(): select differential clk\n", |
|
__func__); |
|
qphy->has_se_clk_scheme = false; |
|
} else { |
|
dev_vdbg(&phy->dev, "%s(): select single-ended clk\n", |
|
__func__); |
|
} |
|
} |
|
|
|
if (!qphy->has_se_clk_scheme) { |
|
ret = clk_prepare_enable(qphy->ref_clk); |
|
if (ret) { |
|
dev_err(&phy->dev, "failed to enable ref clk, %d\n", |
|
ret); |
|
goto assert_phy_reset; |
|
} |
|
} |
|
|
|
if (cfg->has_pll_test) { |
|
if (!qphy->has_se_clk_scheme) |
|
val &= ~CLK_REF_SEL; |
|
else |
|
val |= CLK_REF_SEL; |
|
|
|
writel(val, qphy->base + QUSB2PHY_PLL_TEST); |
|
|
|
/* ensure above write is through */ |
|
readl(qphy->base + QUSB2PHY_PLL_TEST); |
|
} |
|
|
|
/* Required to get phy pll lock successfully */ |
|
usleep_range(100, 110); |
|
|
|
val = readb(qphy->base + cfg->regs[QUSB2PHY_PLL_STATUS]); |
|
if (!(val & cfg->mask_core_ready)) { |
|
dev_err(&phy->dev, |
|
"QUSB2PHY pll lock failed: status reg = %x\n", val); |
|
ret = -EBUSY; |
|
goto disable_ref_clk; |
|
} |
|
qphy->phy_initialized = true; |
|
|
|
return 0; |
|
|
|
disable_ref_clk: |
|
if (!qphy->has_se_clk_scheme) |
|
clk_disable_unprepare(qphy->ref_clk); |
|
assert_phy_reset: |
|
reset_control_assert(qphy->phy_reset); |
|
disable_ahb_clk: |
|
clk_disable_unprepare(qphy->cfg_ahb_clk); |
|
disable_iface_clk: |
|
clk_disable_unprepare(qphy->iface_clk); |
|
poweroff_phy: |
|
regulator_bulk_disable(ARRAY_SIZE(qphy->vregs), qphy->vregs); |
|
|
|
return ret; |
|
} |
|
|
|
static int qusb2_phy_exit(struct phy *phy) |
|
{ |
|
struct qusb2_phy *qphy = phy_get_drvdata(phy); |
|
|
|
/* Disable the PHY */ |
|
qusb2_setbits(qphy->base, qphy->cfg->regs[QUSB2PHY_PORT_POWERDOWN], |
|
qphy->cfg->disable_ctrl); |
|
|
|
if (!qphy->has_se_clk_scheme) |
|
clk_disable_unprepare(qphy->ref_clk); |
|
|
|
reset_control_assert(qphy->phy_reset); |
|
|
|
clk_disable_unprepare(qphy->cfg_ahb_clk); |
|
clk_disable_unprepare(qphy->iface_clk); |
|
|
|
regulator_bulk_disable(ARRAY_SIZE(qphy->vregs), qphy->vregs); |
|
|
|
qphy->phy_initialized = false; |
|
|
|
return 0; |
|
} |
|
|
|
static const struct phy_ops qusb2_phy_gen_ops = { |
|
.init = qusb2_phy_init, |
|
.exit = qusb2_phy_exit, |
|
.set_mode = qusb2_phy_set_mode, |
|
.owner = THIS_MODULE, |
|
}; |
|
|
|
static const struct of_device_id qusb2_phy_of_match_table[] = { |
|
{ |
|
.compatible = "qcom,ipq8074-qusb2-phy", |
|
.data = &msm8996_phy_cfg, |
|
}, { |
|
.compatible = "qcom,msm8996-qusb2-phy", |
|
.data = &msm8996_phy_cfg, |
|
}, { |
|
.compatible = "qcom,msm8998-qusb2-phy", |
|
.data = &msm8998_phy_cfg, |
|
}, { |
|
/* |
|
* Deprecated. Only here to support legacy device |
|
* trees that didn't include "qcom,qusb2-v2-phy" |
|
*/ |
|
.compatible = "qcom,sdm845-qusb2-phy", |
|
.data = &qusb2_v2_phy_cfg, |
|
}, { |
|
.compatible = "qcom,qusb2-v2-phy", |
|
.data = &qusb2_v2_phy_cfg, |
|
}, |
|
{ }, |
|
}; |
|
MODULE_DEVICE_TABLE(of, qusb2_phy_of_match_table); |
|
|
|
static const struct dev_pm_ops qusb2_phy_pm_ops = { |
|
SET_RUNTIME_PM_OPS(qusb2_phy_runtime_suspend, |
|
qusb2_phy_runtime_resume, NULL) |
|
}; |
|
|
|
static int qusb2_phy_probe(struct platform_device *pdev) |
|
{ |
|
struct device *dev = &pdev->dev; |
|
struct qusb2_phy *qphy; |
|
struct phy_provider *phy_provider; |
|
struct phy *generic_phy; |
|
struct resource *res; |
|
int ret, i; |
|
int num; |
|
u32 value; |
|
struct override_params *or; |
|
|
|
qphy = devm_kzalloc(dev, sizeof(*qphy), GFP_KERNEL); |
|
if (!qphy) |
|
return -ENOMEM; |
|
or = &qphy->overrides; |
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
|
qphy->base = devm_ioremap_resource(dev, res); |
|
if (IS_ERR(qphy->base)) |
|
return PTR_ERR(qphy->base); |
|
|
|
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, %d\n", ret); |
|
return ret; |
|
} |
|
|
|
qphy->ref_clk = devm_clk_get(dev, "ref"); |
|
if (IS_ERR(qphy->ref_clk)) { |
|
ret = PTR_ERR(qphy->ref_clk); |
|
if (ret != -EPROBE_DEFER) |
|
dev_err(dev, "failed to get ref clk, %d\n", ret); |
|
return ret; |
|
} |
|
|
|
qphy->iface_clk = devm_clk_get_optional(dev, "iface"); |
|
if (IS_ERR(qphy->iface_clk)) |
|
return PTR_ERR(qphy->iface_clk); |
|
|
|
qphy->phy_reset = devm_reset_control_get_by_index(&pdev->dev, 0); |
|
if (IS_ERR(qphy->phy_reset)) { |
|
dev_err(dev, "failed to get phy core reset\n"); |
|
return PTR_ERR(qphy->phy_reset); |
|
} |
|
|
|
num = ARRAY_SIZE(qphy->vregs); |
|
for (i = 0; i < num; i++) |
|
qphy->vregs[i].supply = qusb2_phy_vreg_names[i]; |
|
|
|
ret = devm_regulator_bulk_get(dev, num, qphy->vregs); |
|
if (ret) { |
|
if (ret != -EPROBE_DEFER) |
|
dev_err(dev, "failed to get regulator supplies: %d\n", |
|
ret); |
|
return ret; |
|
} |
|
|
|
/* Get the specific init parameters of QMP phy */ |
|
qphy->cfg = of_device_get_match_data(dev); |
|
|
|
qphy->tcsr = syscon_regmap_lookup_by_phandle(dev->of_node, |
|
"qcom,tcsr-syscon"); |
|
if (IS_ERR(qphy->tcsr)) { |
|
dev_dbg(dev, "failed to lookup TCSR regmap\n"); |
|
qphy->tcsr = NULL; |
|
} |
|
|
|
qphy->cell = devm_nvmem_cell_get(dev, NULL); |
|
if (IS_ERR(qphy->cell)) { |
|
if (PTR_ERR(qphy->cell) == -EPROBE_DEFER) |
|
return -EPROBE_DEFER; |
|
qphy->cell = NULL; |
|
dev_dbg(dev, "failed to lookup tune2 hstx trim value\n"); |
|
} |
|
|
|
if (!of_property_read_u32(dev->of_node, "qcom,imp-res-offset-value", |
|
&value)) { |
|
or->imp_res_offset.value = (u8)value; |
|
or->imp_res_offset.override = true; |
|
} |
|
|
|
if (!of_property_read_u32(dev->of_node, "qcom,bias-ctrl-value", |
|
&value)) { |
|
or->bias_ctrl.value = (u8)value; |
|
or->bias_ctrl.override = true; |
|
} |
|
|
|
if (!of_property_read_u32(dev->of_node, "qcom,charge-ctrl-value", |
|
&value)) { |
|
or->charge_ctrl.value = (u8)value; |
|
or->charge_ctrl.override = true; |
|
} |
|
|
|
if (!of_property_read_u32(dev->of_node, "qcom,hstx-trim-value", |
|
&value)) { |
|
or->hstx_trim.value = (u8)value; |
|
or->hstx_trim.override = true; |
|
} |
|
|
|
if (!of_property_read_u32(dev->of_node, "qcom,preemphasis-level", |
|
&value)) { |
|
or->preemphasis.value = (u8)value; |
|
or->preemphasis.override = true; |
|
} |
|
|
|
if (!of_property_read_u32(dev->of_node, "qcom,preemphasis-width", |
|
&value)) { |
|
or->preemphasis_width.value = (u8)value; |
|
or->preemphasis_width.override = true; |
|
} |
|
|
|
if (!of_property_read_u32(dev->of_node, "qcom,hsdisc-trim-value", |
|
&value)) { |
|
or->hsdisc_trim.value = (u8)value; |
|
or->hsdisc_trim.override = true; |
|
} |
|
|
|
pm_runtime_set_active(dev); |
|
pm_runtime_enable(dev); |
|
/* |
|
* Prevent runtime pm from being ON by default. Users can enable |
|
* it using power/control in sysfs. |
|
*/ |
|
pm_runtime_forbid(dev); |
|
|
|
generic_phy = devm_phy_create(dev, NULL, &qusb2_phy_gen_ops); |
|
if (IS_ERR(generic_phy)) { |
|
ret = PTR_ERR(generic_phy); |
|
dev_err(dev, "failed to create phy, %d\n", ret); |
|
pm_runtime_disable(dev); |
|
return ret; |
|
} |
|
qphy->phy = generic_phy; |
|
|
|
dev_set_drvdata(dev, qphy); |
|
phy_set_drvdata(generic_phy, qphy); |
|
|
|
phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); |
|
if (!IS_ERR(phy_provider)) |
|
dev_info(dev, "Registered Qcom-QUSB2 phy\n"); |
|
else |
|
pm_runtime_disable(dev); |
|
|
|
return PTR_ERR_OR_ZERO(phy_provider); |
|
} |
|
|
|
static struct platform_driver qusb2_phy_driver = { |
|
.probe = qusb2_phy_probe, |
|
.driver = { |
|
.name = "qcom-qusb2-phy", |
|
.pm = &qusb2_phy_pm_ops, |
|
.of_match_table = qusb2_phy_of_match_table, |
|
}, |
|
}; |
|
|
|
module_platform_driver(qusb2_phy_driver); |
|
|
|
MODULE_AUTHOR("Vivek Gautam <[email protected]>"); |
|
MODULE_DESCRIPTION("Qualcomm QUSB2 PHY driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|