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Message-ID: <71a0a70a5b29cb38d83ccfdfb871bcb2.squirrel@www.codeaurora.org>
Date: Thu, 15 Jan 2015 15:20:52 -0000
From: "Dov Levenglick" <dovl@...eaurora.org>
To: "Yaniv Gardi" <ygardi@...eaurora.org>
Cc: james.bottomley@...senpartnership.com, hch@...radead.org,
linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
linux-arm-msm@...r.kernel.org, santoshsy@...il.com,
linux-scsi-owner@...r.kernel.org, subhashj@...eaurora.org,
ygardi@...eaurora.org, noag@...eaurora.org, draviv@...eaurora.org,
"Vinayak Holikatti" <vinholikatti@...il.com>,
"James E.J. Bottomley" <jbottomley@...allels.com>
Subject: Re: [PATCH v7 3/5] scsi: ufs-qcom: add support for Qualcomm
Technologies Inc platforms
Reviewed-by: Dov Levenglick <dovl@...eaurora.org>
> This change adds support for Qualcomm Technologies Inc platforms that
> use UFS driver. for example, it adds :
> - PM specific operations during hibern8, suspend, resume, clock setup
> - qcom-ufs generic phy driver initialization, calibration,
> power-on/off sequence, etc.
> - UFS Controller specific configuration
> - Rate, Gear, Mode negotiation between device and controller
>
> Signed-off-by: Yaniv Gardi <ygardi@...eaurora.org>
>
> ---
> drivers/scsi/ufs/Kconfig | 13 +
> drivers/scsi/ufs/Makefile | 1 +
> drivers/scsi/ufs/ufs-qcom.c | 1004
> +++++++++++++++++++++++++++++++++++++++++++
> drivers/scsi/ufs/ufs-qcom.h | 170 ++++++++
> 4 files changed, 1188 insertions(+)
> create mode 100644 drivers/scsi/ufs/ufs-qcom.c
> create mode 100644 drivers/scsi/ufs/ufs-qcom.h
>
> diff --git a/drivers/scsi/ufs/Kconfig b/drivers/scsi/ufs/Kconfig
> index 6e07b2a..8a1f4b3 100644
> --- a/drivers/scsi/ufs/Kconfig
> +++ b/drivers/scsi/ufs/Kconfig
> @@ -70,3 +70,16 @@ config SCSI_UFSHCD_PLATFORM
> If you have a controller with this interface, say Y or M here.
>
> If unsure, say N.
> +
> +config SCSI_UFS_QCOM
> + bool "QCOM specific hooks to UFS controller platform driver"
> + depends on SCSI_UFSHCD_PLATFORM && ARCH_MSM
> + select PHY_QCOM_UFS
> + help
> + This selects the QCOM specific additions to UFSHCD platform
> driver.
> + UFS host on QCOM needs some vendor specific configuration before
> + accessing the hardware which includes PHY configuration and
> vendor
> + specific registers.
> +
> + Select this if you have UFS controller on QCOM chipset.
> + If unsure, say N.
> diff --git a/drivers/scsi/ufs/Makefile b/drivers/scsi/ufs/Makefile
> index 1e5bd48..8303bcc 100644
> --- a/drivers/scsi/ufs/Makefile
> +++ b/drivers/scsi/ufs/Makefile
> @@ -1,4 +1,5 @@
> # UFSHCD makefile
> +obj-$(CONFIG_SCSI_UFS_QCOM) += ufs-qcom.o
> obj-$(CONFIG_SCSI_UFSHCD) += ufshcd.o
> obj-$(CONFIG_SCSI_UFSHCD_PCI) += ufshcd-pci.o
> obj-$(CONFIG_SCSI_UFSHCD_PLATFORM) += ufshcd-pltfrm.o
> diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
> new file mode 100644
> index 0000000..9217af9
> --- /dev/null
> +++ b/drivers/scsi/ufs/ufs-qcom.c
> @@ -0,0 +1,1004 @@
> +/*
> + * Copyright (c) 2013-2015, 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/time.h>
> +#include <linux/of.h>
> +#include <linux/platform_device.h>
> +#include <linux/phy/phy.h>
> +
> +#include <linux/phy/phy-qcom-ufs.h>
> +#include "ufshcd.h"
> +#include "unipro.h"
> +#include "ufs-qcom.h"
> +#include "ufshci.h"
> +
> +static struct ufs_qcom_host *ufs_qcom_hosts[MAX_UFS_QCOM_HOSTS];
> +
> +static void ufs_qcom_get_speed_mode(struct ufs_pa_layer_attr *p, char
> *result);
> +static int ufs_qcom_get_bus_vote(struct ufs_qcom_host *host,
> + const char *speed_mode);
> +static int ufs_qcom_set_bus_vote(struct ufs_qcom_host *host, int vote);
> +
> +static int ufs_qcom_get_connected_tx_lanes(struct ufs_hba *hba, u32
> *tx_lanes)
> +{
> + int err = 0;
> +
> + err = ufshcd_dme_get(hba,
> + UIC_ARG_MIB(PA_CONNECTEDTXDATALANES), tx_lanes);
> + if (err)
> + dev_err(hba->dev, "%s: couldn't read
> PA_CONNECTEDTXDATALANES %d\n",
> + __func__, err);
> +
> + return err;
> +}
> +
> +static int ufs_qcom_host_clk_get(struct device *dev,
> + const char *name, struct clk **clk_out)
> +{
> + struct clk *clk;
> + int err = 0;
> +
> + clk = devm_clk_get(dev, name);
> + if (IS_ERR(clk)) {
> + err = PTR_ERR(clk);
> + dev_err(dev, "%s: failed to get %s err %d",
> + __func__, name, err);
> + } else {
> + *clk_out = clk;
> + }
> +
> + return err;
> +}
> +
> +static int ufs_qcom_host_clk_enable(struct device *dev,
> + const char *name, struct clk *clk)
> +{
> + int err = 0;
> +
> + err = clk_prepare_enable(clk);
> + if (err)
> + dev_err(dev, "%s: %s enable failed %d\n", __func__, name,
> err);
> +
> + return err;
> +}
> +
> +static void ufs_qcom_disable_lane_clks(struct ufs_qcom_host *host)
> +{
> + if (!host->is_lane_clks_enabled)
> + return;
> +
> + clk_disable_unprepare(host->tx_l1_sync_clk);
> + clk_disable_unprepare(host->tx_l0_sync_clk);
> + clk_disable_unprepare(host->rx_l1_sync_clk);
> + clk_disable_unprepare(host->rx_l0_sync_clk);
> +
> + host->is_lane_clks_enabled = false;
> +}
> +
> +static int ufs_qcom_enable_lane_clks(struct ufs_qcom_host *host)
> +{
> + int err = 0;
> + struct device *dev = host->hba->dev;
> +
> + if (host->is_lane_clks_enabled)
> + return 0;
> +
> + err = ufs_qcom_host_clk_enable(dev, "rx_lane0_sync_clk",
> + host->rx_l0_sync_clk);
> + if (err)
> + goto out;
> +
> + err = ufs_qcom_host_clk_enable(dev, "tx_lane0_sync_clk",
> + host->tx_l0_sync_clk);
> + if (err)
> + goto disable_rx_l0;
> +
> + err = ufs_qcom_host_clk_enable(dev, "rx_lane1_sync_clk",
> + host->rx_l1_sync_clk);
> + if (err)
> + goto disable_tx_l0;
> +
> + err = ufs_qcom_host_clk_enable(dev, "tx_lane1_sync_clk",
> + host->tx_l1_sync_clk);
> + if (err)
> + goto disable_rx_l1;
> +
> + host->is_lane_clks_enabled = true;
> + goto out;
> +
> +disable_rx_l1:
> + clk_disable_unprepare(host->rx_l1_sync_clk);
> +disable_tx_l0:
> + clk_disable_unprepare(host->tx_l0_sync_clk);
> +disable_rx_l0:
> + clk_disable_unprepare(host->rx_l0_sync_clk);
> +out:
> + return err;
> +}
> +
> +static int ufs_qcom_init_lane_clks(struct ufs_qcom_host *host)
> +{
> + int err = 0;
> + struct device *dev = host->hba->dev;
> +
> + err = ufs_qcom_host_clk_get(dev,
> + "rx_lane0_sync_clk", &host->rx_l0_sync_clk);
> + if (err)
> + goto out;
> +
> + err = ufs_qcom_host_clk_get(dev,
> + "tx_lane0_sync_clk", &host->tx_l0_sync_clk);
> + if (err)
> + goto out;
> +
> + err = ufs_qcom_host_clk_get(dev, "rx_lane1_sync_clk",
> + &host->rx_l1_sync_clk);
> + if (err)
> + goto out;
> +
> + err = ufs_qcom_host_clk_get(dev, "tx_lane1_sync_clk",
> + &host->tx_l1_sync_clk);
> +out:
> + return err;
> +}
> +
> +static int ufs_qcom_link_startup_post_change(struct ufs_hba *hba)
> +{
> + struct ufs_qcom_host *host = hba->priv;
> + struct phy *phy = host->generic_phy;
> + u32 tx_lanes;
> + int err = 0;
> +
> + err = ufs_qcom_get_connected_tx_lanes(hba, &tx_lanes);
> + if (err)
> + goto out;
> +
> + err = ufs_qcom_phy_set_tx_lane_enable(phy, tx_lanes);
> + if (err)
> + dev_err(hba->dev, "%s: ufs_qcom_phy_set_tx_lane_enable
> failed\n",
> + __func__);
> +
> +out:
> + return err;
> +}
> +
> +static int ufs_qcom_check_hibern8(struct ufs_hba *hba)
> +{
> + int err;
> + u32 tx_fsm_val = 0;
> + unsigned long timeout = jiffies +
> msecs_to_jiffies(HBRN8_POLL_TOUT_MS);
> +
> + do {
> + err = ufshcd_dme_get(hba,
> + UIC_ARG_MIB(MPHY_TX_FSM_STATE), &tx_fsm_val);
> + if (err || tx_fsm_val == TX_FSM_HIBERN8)
> + break;
> +
> + /* sleep for max. 200us */
> + usleep_range(100, 200);
> + } while (time_before(jiffies, timeout));
> +
> + /*
> + * we might have scheduled out for long during polling so
> + * check the state again.
> + */
> + if (time_after(jiffies, timeout))
> + err = ufshcd_dme_get(hba,
> + UIC_ARG_MIB(MPHY_TX_FSM_STATE),
> &tx_fsm_val);
> +
> + if (err) {
> + dev_err(hba->dev, "%s: unable to get TX_FSM_STATE, err
> %d\n",
> + __func__, err);
> + } else if (tx_fsm_val != TX_FSM_HIBERN8) {
> + err = tx_fsm_val;
> + dev_err(hba->dev, "%s: invalid TX_FSM_STATE = %d\n",
> + __func__, err);
> + }
> +
> + return err;
> +}
> +
> +static int ufs_qcom_power_up_sequence(struct ufs_hba *hba)
> +{
> + struct ufs_qcom_host *host = hba->priv;
> + struct phy *phy = host->generic_phy;
> + int ret = 0;
> + u8 major;
> + u16 minor, step;
> + bool is_rate_B = (UFS_QCOM_LIMIT_HS_RATE == PA_HS_MODE_B)
> + ? true : false;
> +
> + /* Assert PHY reset and apply PHY calibration values */
> + ufs_qcom_assert_reset(hba);
> + /* provide 1ms delay to let the reset pulse propagate */
> + usleep_range(1000, 1100);
> +
> + ufs_qcom_get_controller_revision(hba, &major, &minor, &step);
> + ufs_qcom_phy_save_controller_version(phy, major, minor, step);
> + ret = ufs_qcom_phy_calibrate_phy(phy, is_rate_B);
> + if (ret) {
> + dev_err(hba->dev, "%s: ufs_qcom_phy_calibrate_phy()
> failed, ret = %d\n",
> + __func__, ret);
> + goto out;
> + }
> +
> + /* De-assert PHY reset and start serdes */
> + ufs_qcom_deassert_reset(hba);
> +
> + /*
> + * after reset deassertion, phy will need all ref clocks,
> + * voltage, current to settle down before starting serdes.
> + */
> + usleep_range(1000, 1100);
> + ret = ufs_qcom_phy_start_serdes(phy);
> + if (ret) {
> + dev_err(hba->dev, "%s: ufs_qcom_phy_start_serdes() failed,
> ret = %d\n",
> + __func__, ret);
> + goto out;
> + }
> +
> + ret = ufs_qcom_phy_is_pcs_ready(phy);
> + if (ret)
> + dev_err(hba->dev, "%s: is_physical_coding_sublayer_ready()
> failed, ret = %d\n",
> + __func__, ret);
> +
> +out:
> + return ret;
> +}
> +
> +/*
> + * The UTP controller has a number of internal clock gating cells (CGCs).
> + * Internal hardware sub-modules within the UTP controller control the
> CGCs.
> + * Hardware CGCs disable the clock to inactivate UTP sub-modules not
> involved
> + * in a specific operation, UTP controller CGCs are by default disabled
> and
> + * this function enables them (after every UFS link startup) to save some
> power
> + * leakage.
> + */
> +static void ufs_qcom_enable_hw_clk_gating(struct ufs_hba *hba)
> +{
> + ufshcd_writel(hba,
> + ufshcd_readl(hba, REG_UFS_CFG2) | REG_UFS_CFG2_CGC_EN_ALL,
> + REG_UFS_CFG2);
> +
> + /* Ensure that HW clock gating is enabled before next operations
> */
> + mb();
> +}
> +
> +static int ufs_qcom_hce_enable_notify(struct ufs_hba *hba, bool status)
> +{
> + struct ufs_qcom_host *host = hba->priv;
> + int err = 0;
> +
> + switch (status) {
> + case PRE_CHANGE:
> + ufs_qcom_power_up_sequence(hba);
> + /*
> + * The PHY PLL output is the source of tx/rx lane symbol
> + * clocks, hence, enable the lane clocks only after PHY
> + * is initialized.
> + */
> + err = ufs_qcom_enable_lane_clks(host);
> + break;
> + case POST_CHANGE:
> + /* check if UFS PHY moved from DISABLED to HIBERN8 */
> + err = ufs_qcom_check_hibern8(hba);
> + ufs_qcom_enable_hw_clk_gating(hba);
> +
> + break;
> + default:
> + dev_err(hba->dev, "%s: invalid status %d\n", __func__,
> status);
> + err = -EINVAL;
> + break;
> + }
> + return err;
> +}
> +
> +/**
> + * Returns non-zero for success (which rate of core_clk) and 0
> + * in case of a failure
> + */
> +static unsigned long
> +ufs_qcom_cfg_timers(struct ufs_hba *hba, u32 gear, u32 hs, u32 rate)
> +{
> + struct ufs_clk_info *clki;
> + u32 core_clk_period_in_ns;
> + u32 tx_clk_cycles_per_us = 0;
> + unsigned long core_clk_rate = 0;
> + u32 core_clk_cycles_per_us = 0;
> +
> + static u32 pwm_fr_table[][2] = {
> + {UFS_PWM_G1, 0x1},
> + {UFS_PWM_G2, 0x1},
> + {UFS_PWM_G3, 0x1},
> + {UFS_PWM_G4, 0x1},
> + };
> +
> + static u32 hs_fr_table_rA[][2] = {
> + {UFS_HS_G1, 0x1F},
> + {UFS_HS_G2, 0x3e},
> + };
> +
> + static u32 hs_fr_table_rB[][2] = {
> + {UFS_HS_G1, 0x24},
> + {UFS_HS_G2, 0x49},
> + };
> +
> + if (gear == 0) {
> + dev_err(hba->dev, "%s: invalid gear = %d\n", __func__,
> gear);
> + goto out_error;
> + }
> +
> + list_for_each_entry(clki, &hba->clk_list_head, list) {
> + if (!strcmp(clki->name, "core_clk"))
> + core_clk_rate = clk_get_rate(clki->clk);
> + }
> +
> + /* If frequency is smaller than 1MHz, set to 1MHz */
> + if (core_clk_rate < DEFAULT_CLK_RATE_HZ)
> + core_clk_rate = DEFAULT_CLK_RATE_HZ;
> +
> + core_clk_cycles_per_us = core_clk_rate / USEC_PER_SEC;
> + ufshcd_writel(hba, core_clk_cycles_per_us, REG_UFS_SYS1CLK_1US);
> +
> + core_clk_period_in_ns = NSEC_PER_SEC / core_clk_rate;
> + core_clk_period_in_ns <<= OFFSET_CLK_NS_REG;
> + core_clk_period_in_ns &= MASK_CLK_NS_REG;
> +
> + switch (hs) {
> + case FASTAUTO_MODE:
> + case FAST_MODE:
> + if (rate == PA_HS_MODE_A) {
> + if (gear > ARRAY_SIZE(hs_fr_table_rA)) {
> + dev_err(hba->dev,
> + "%s: index %d exceeds table size
> %zu\n",
> + __func__, gear,
> + ARRAY_SIZE(hs_fr_table_rA));
> + goto out_error;
> + }
> + tx_clk_cycles_per_us = hs_fr_table_rA[gear-1][1];
> + } else if (rate == PA_HS_MODE_B) {
> + if (gear > ARRAY_SIZE(hs_fr_table_rB)) {
> + dev_err(hba->dev,
> + "%s: index %d exceeds table size
> %zu\n",
> + __func__, gear,
> + ARRAY_SIZE(hs_fr_table_rB));
> + goto out_error;
> + }
> + tx_clk_cycles_per_us = hs_fr_table_rB[gear-1][1];
> + } else {
> + dev_err(hba->dev, "%s: invalid rate = %d\n",
> + __func__, rate);
> + goto out_error;
> + }
> + break;
> + case SLOWAUTO_MODE:
> + case SLOW_MODE:
> + if (gear > ARRAY_SIZE(pwm_fr_table)) {
> + dev_err(hba->dev,
> + "%s: index %d exceeds table size
> %zu\n",
> + __func__, gear,
> + ARRAY_SIZE(pwm_fr_table));
> + goto out_error;
> + }
> + tx_clk_cycles_per_us = pwm_fr_table[gear-1][1];
> + break;
> + case UNCHANGED:
> + default:
> + dev_err(hba->dev, "%s: invalid mode = %d\n", __func__,
> hs);
> + goto out_error;
> + }
> +
> + /* this register 2 fields shall be written at once */
> + ufshcd_writel(hba, core_clk_period_in_ns | tx_clk_cycles_per_us,
> +
> REG_UFS_TX_SYMBOL_CLK_NS_US);
> + goto out;
> +
> +out_error:
> + core_clk_rate = 0;
> +out:
> + return core_clk_rate;
> +}
> +
> +static int ufs_qcom_link_startup_notify(struct ufs_hba *hba, bool status)
> +{
> + unsigned long core_clk_rate = 0;
> + u32 core_clk_cycles_per_100ms;
> +
> + switch (status) {
> + case PRE_CHANGE:
> + core_clk_rate = ufs_qcom_cfg_timers(hba, UFS_PWM_G1,
> + SLOWAUTO_MODE, 0);
> + if (!core_clk_rate) {
> + dev_err(hba->dev, "%s: ufs_qcom_cfg_timers()
> failed\n",
> + __func__);
> + return -EINVAL;
> + }
> + core_clk_cycles_per_100ms =
> + (core_clk_rate / MSEC_PER_SEC) * 100;
> + ufshcd_writel(hba, core_clk_cycles_per_100ms,
> + REG_UFS_PA_LINK_STARTUP_TIMER);
> + break;
> + case POST_CHANGE:
> + ufs_qcom_link_startup_post_change(hba);
> + break;
> + default:
> + break;
> + }
> +
> + return 0;
> +}
> +
> +static int ufs_qcom_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
> +{
> + struct ufs_qcom_host *host = hba->priv;
> + struct phy *phy = host->generic_phy;
> + int ret = 0;
> +
> + if (ufs_qcom_is_link_off(hba)) {
> + /*
> + * Disable the tx/rx lane symbol clocks before PHY is
> + * powered down as the PLL source should be disabled
> + * after downstream clocks are disabled.
> + */
> + ufs_qcom_disable_lane_clks(host);
> + phy_power_off(phy);
> +
> + /* Assert PHY soft reset */
> + ufs_qcom_assert_reset(hba);
> + goto out;
> + }
> +
> + /*
> + * If UniPro link is not active, PHY ref_clk, main PHY analog
> power
> + * rail and low noise analog power rail for PLL can be switched
> off.
> + */
> + if (!ufs_qcom_is_link_active(hba))
> + phy_power_off(phy);
> +
> +out:
> + return ret;
> +}
> +
> +static int ufs_qcom_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
> +{
> + struct ufs_qcom_host *host = hba->priv;
> + struct phy *phy = host->generic_phy;
> + int err;
> +
> + err = phy_power_on(phy);
> + if (err) {
> + dev_err(hba->dev, "%s: failed enabling regs, err = %d\n",
> + __func__, err);
> + goto out;
> + }
> +
> + hba->is_sys_suspended = false;
> +
> +out:
> + return err;
> +}
> +
> +struct ufs_qcom_dev_params {
> + u32 pwm_rx_gear; /* pwm rx gear to work in */
> + u32 pwm_tx_gear; /* pwm tx gear to work in */
> + u32 hs_rx_gear; /* hs rx gear to work in */
> + u32 hs_tx_gear; /* hs tx gear to work in */
> + u32 rx_lanes; /* number of rx lanes */
> + u32 tx_lanes; /* number of tx lanes */
> + u32 rx_pwr_pwm; /* rx pwm working pwr */
> + u32 tx_pwr_pwm; /* tx pwm working pwr */
> + u32 rx_pwr_hs; /* rx hs working pwr */
> + u32 tx_pwr_hs; /* tx hs working pwr */
> + u32 hs_rate; /* rate A/B to work in HS */
> + u32 desired_working_mode;
> +};
> +
> +static int ufs_qcom_get_pwr_dev_param(struct ufs_qcom_dev_params
> *qcom_param,
> + struct ufs_pa_layer_attr *dev_max,
> + struct ufs_pa_layer_attr
> *agreed_pwr)
> +{
> + int min_qcom_gear;
> + int min_dev_gear;
> + bool is_dev_sup_hs = false;
> + bool is_qcom_max_hs = false;
> +
> + if (dev_max->pwr_rx == FAST_MODE)
> + is_dev_sup_hs = true;
> +
> + if (qcom_param->desired_working_mode == FAST) {
> + is_qcom_max_hs = true;
> + min_qcom_gear = min_t(u32, qcom_param->hs_rx_gear,
> + qcom_param->hs_tx_gear);
> + } else {
> + min_qcom_gear = min_t(u32, qcom_param->pwm_rx_gear,
> + qcom_param->pwm_tx_gear);
> + }
> +
> + /*
> + * device doesn't support HS but qcom_param->desired_working_mode
> is
> + * HS, thus device and qcom_param don't agree
> + */
> + if (!is_dev_sup_hs && is_qcom_max_hs) {
> + pr_err("%s: failed to agree on power mode (device doesn't
> support HS but requested power is HS)\n",
> + __func__);
> + return -ENOTSUPP;
> + } else if (is_dev_sup_hs && is_qcom_max_hs) {
> + /*
> + * since device supports HS, it supports FAST_MODE.
> + * since qcom_param->desired_working_mode is also HS
> + * then final decision (FAST/FASTAUTO) is done according
> + * to qcom_params as it is the restricting factor
> + */
> + agreed_pwr->pwr_rx = agreed_pwr->pwr_tx =
> + qcom_param->rx_pwr_hs;
> + } else {
> + /*
> + * here qcom_param->desired_working_mode is PWM.
> + * it doesn't matter whether device supports HS or PWM,
> + * in both cases qcom_param->desired_working_mode will
> + * determine the mode
> + */
> + agreed_pwr->pwr_rx = agreed_pwr->pwr_tx =
> + qcom_param->rx_pwr_pwm;
> + }
> +
> + /*
> + * we would like tx to work in the minimum number of lanes
> + * between device capability and vendor preferences.
> + * the same decision will be made for rx
> + */
> + agreed_pwr->lane_tx = min_t(u32, dev_max->lane_tx,
> + qcom_param->tx_lanes);
> + agreed_pwr->lane_rx = min_t(u32, dev_max->lane_rx,
> + qcom_param->rx_lanes);
> +
> + /* device maximum gear is the minimum between device rx and tx
> gears */
> + min_dev_gear = min_t(u32, dev_max->gear_rx, dev_max->gear_tx);
> +
> + /*
> + * if both device capabilities and vendor pre-defined preferences
> are
> + * both HS or both PWM then set the minimum gear to be the chosen
> + * working gear.
> + * if one is PWM and one is HS then the one that is PWM get to
> decide
> + * what is the gear, as it is the one that also decided previously
> what
> + * pwr the device will be configured to.
> + */
> + if ((is_dev_sup_hs && is_qcom_max_hs) ||
> + (!is_dev_sup_hs && !is_qcom_max_hs))
> + agreed_pwr->gear_rx = agreed_pwr->gear_tx =
> + min_t(u32, min_dev_gear, min_qcom_gear);
> + else if (!is_dev_sup_hs)
> + agreed_pwr->gear_rx = agreed_pwr->gear_tx = min_dev_gear;
> + else
> + agreed_pwr->gear_rx = agreed_pwr->gear_tx = min_qcom_gear;
> +
> + agreed_pwr->hs_rate = qcom_param->hs_rate;
> + return 0;
> +}
> +
> +static int ufs_qcom_update_bus_bw_vote(struct ufs_qcom_host *host)
> +{
> + int vote;
> + int err = 0;
> + char mode[BUS_VECTOR_NAME_LEN];
> +
> + ufs_qcom_get_speed_mode(&host->dev_req_params, mode);
> +
> + vote = ufs_qcom_get_bus_vote(host, mode);
> + if (vote >= 0)
> + err = ufs_qcom_set_bus_vote(host, vote);
> + else
> + err = vote;
> +
> + if (err)
> + dev_err(host->hba->dev, "%s: failed %d\n", __func__, err);
> + else
> + host->bus_vote.saved_vote = vote;
> + return err;
> +}
> +
> +static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba,
> + bool status,
> + struct ufs_pa_layer_attr *dev_max_params,
> + struct ufs_pa_layer_attr *dev_req_params)
> +{
> + u32 val;
> + struct ufs_qcom_host *host = hba->priv;
> + struct phy *phy = host->generic_phy;
> + struct ufs_qcom_dev_params ufs_qcom_cap;
> + int ret = 0;
> + int res = 0;
> +
> + if (!dev_req_params) {
> + pr_err("%s: incoming dev_req_params is NULL\n", __func__);
> + ret = -EINVAL;
> + goto out;
> + }
> +
> + switch (status) {
> + case PRE_CHANGE:
> + ufs_qcom_cap.tx_lanes = UFS_QCOM_LIMIT_NUM_LANES_TX;
> + ufs_qcom_cap.rx_lanes = UFS_QCOM_LIMIT_NUM_LANES_RX;
> + ufs_qcom_cap.hs_rx_gear = UFS_QCOM_LIMIT_HSGEAR_RX;
> + ufs_qcom_cap.hs_tx_gear = UFS_QCOM_LIMIT_HSGEAR_TX;
> + ufs_qcom_cap.pwm_rx_gear = UFS_QCOM_LIMIT_PWMGEAR_RX;
> + ufs_qcom_cap.pwm_tx_gear = UFS_QCOM_LIMIT_PWMGEAR_TX;
> + ufs_qcom_cap.rx_pwr_pwm = UFS_QCOM_LIMIT_RX_PWR_PWM;
> + ufs_qcom_cap.tx_pwr_pwm = UFS_QCOM_LIMIT_TX_PWR_PWM;
> + ufs_qcom_cap.rx_pwr_hs = UFS_QCOM_LIMIT_RX_PWR_HS;
> + ufs_qcom_cap.tx_pwr_hs = UFS_QCOM_LIMIT_TX_PWR_HS;
> + ufs_qcom_cap.hs_rate = UFS_QCOM_LIMIT_HS_RATE;
> + ufs_qcom_cap.desired_working_mode =
> + UFS_QCOM_LIMIT_DESIRED_MODE;
> +
> + ret = ufs_qcom_get_pwr_dev_param(&ufs_qcom_cap,
> + dev_max_params,
> + dev_req_params);
> + if (ret) {
> + pr_err("%s: failed to determine capabilities\n",
> + __func__);
> + goto out;
> + }
> +
> + break;
> + case POST_CHANGE:
> + if (!ufs_qcom_cfg_timers(hba, dev_req_params->gear_rx,
> + dev_req_params->pwr_rx,
> + dev_req_params->hs_rate)) {
> + dev_err(hba->dev, "%s: ufs_qcom_cfg_timers()
> failed\n",
> + __func__);
> + /*
> + * we return error code at the end of the routine,
> + * but continue to configure
> UFS_PHY_TX_LANE_ENABLE
> + * and bus voting as usual
> + */
> + ret = -EINVAL;
> + }
> +
> + val = ~(MAX_U32 << dev_req_params->lane_tx);
> + res = ufs_qcom_phy_set_tx_lane_enable(phy, val);
> + if (res) {
> + dev_err(hba->dev, "%s:
> ufs_qcom_phy_set_tx_lane_enable() failed res = %d\n",
> + __func__, res);
> + ret = res;
> + }
> +
> + /* cache the power mode parameters to use internally */
> + memcpy(&host->dev_req_params,
> + dev_req_params, sizeof(*dev_req_params));
> + ufs_qcom_update_bus_bw_vote(host);
> + break;
> + default:
> + ret = -EINVAL;
> + break;
> + }
> +out:
> + return ret;
> +}
> +
> +/**
> + * ufs_qcom_advertise_quirks - advertise the known QCOM UFS controller
> quirks
> + * @hba: host controller instance
> + *
> + * QCOM UFS host controller might have some non standard behaviours
> (quirks)
> + * than what is specified by UFSHCI specification. Advertise all such
> + * quirks to standard UFS host controller driver so standard takes them
> into
> + * account.
> + */
> +static void ufs_qcom_advertise_quirks(struct ufs_hba *hba)
> +{
> + u8 major;
> + u16 minor, step;
> +
> + ufs_qcom_get_controller_revision(hba, &major, &minor, &step);
> +
> + /*
> + * TBD
> + * here we should be advertising controller quirks according to
> + * controller version.
> + */
> +}
> +
> +static int ufs_qcom_get_bus_vote(struct ufs_qcom_host *host,
> + const char *speed_mode)
> +{
> + struct device *dev = host->hba->dev;
> + struct device_node *np = dev->of_node;
> + int err;
> + const char *key = "qcom,bus-vector-names";
> +
> + if (!speed_mode) {
> + err = -EINVAL;
> + goto out;
> + }
> +
> + if (host->bus_vote.is_max_bw_needed && !!strcmp(speed_mode,
> "MIN"))
> + err = of_property_match_string(np, key, "MAX");
> + else
> + err = of_property_match_string(np, key, speed_mode);
> +
> +out:
> + if (err < 0)
> + dev_err(dev, "%s: Invalid %s mode %d\n",
> + __func__, speed_mode, err);
> + return err;
> +}
> +
> +static int ufs_qcom_set_bus_vote(struct ufs_qcom_host *host, int vote)
> +{
> + int err = 0;
> +
> + if (vote != host->bus_vote.curr_vote)
> + host->bus_vote.curr_vote = vote;
> +
> + return err;
> +}
> +
> +static void ufs_qcom_get_speed_mode(struct ufs_pa_layer_attr *p, char
> *result)
> +{
> + int gear = max_t(u32, p->gear_rx, p->gear_tx);
> + int lanes = max_t(u32, p->lane_rx, p->lane_tx);
> + int pwr;
> +
> + /* default to PWM Gear 1, Lane 1 if power mode is not initialized
> */
> + if (!gear)
> + gear = 1;
> +
> + if (!lanes)
> + lanes = 1;
> +
> + if (!p->pwr_rx && !p->pwr_tx) {
> + pwr = SLOWAUTO_MODE;
> + snprintf(result, BUS_VECTOR_NAME_LEN, "MIN");
> + } else if (p->pwr_rx == FAST_MODE || p->pwr_rx == FASTAUTO_MODE ||
> + p->pwr_tx == FAST_MODE || p->pwr_tx == FASTAUTO_MODE) {
> + pwr = FAST_MODE;
> + snprintf(result, BUS_VECTOR_NAME_LEN, "%s_R%s_G%d_L%d",
> "HS",
> + p->hs_rate == PA_HS_MODE_B ? "B" : "A", gear,
> lanes);
> + } else {
> + pwr = SLOW_MODE;
> + snprintf(result, BUS_VECTOR_NAME_LEN, "%s_G%d_L%d",
> + "PWM", gear, lanes);
> + }
> +}
> +
> +static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on)
> +{
> + struct ufs_qcom_host *host = hba->priv;
> + int err = 0;
> + int vote = 0;
> +
> + /*
> + * In case ufs_qcom_init() is not yet done, simply ignore.
> + * This ufs_qcom_setup_clocks() shall be called from
> + * ufs_qcom_init() after init is done.
> + */
> + if (!host)
> + return 0;
> +
> + if (on) {
> + err = ufs_qcom_phy_enable_iface_clk(host->generic_phy);
> + if (err)
> + goto out;
> +
> + err = ufs_qcom_phy_enable_ref_clk(host->generic_phy);
> + if (err) {
> + dev_err(hba->dev, "%s enable phy ref clock failed,
> err=%d\n",
> + __func__, err);
> + ufs_qcom_phy_disable_iface_clk(host->generic_phy);
> + goto out;
> + }
> + /* enable the device ref clock */
> + ufs_qcom_phy_enable_dev_ref_clk(host->generic_phy);
> + vote = host->bus_vote.saved_vote;
> + if (vote == host->bus_vote.min_bw_vote)
> + ufs_qcom_update_bus_bw_vote(host);
> + } else {
> + /* M-PHY RMMI interface clocks can be turned off */
> + ufs_qcom_phy_disable_iface_clk(host->generic_phy);
> + if (!ufs_qcom_is_link_active(hba)) {
> + /* turn off UFS local PHY ref_clk */
> + ufs_qcom_phy_disable_ref_clk(host->generic_phy);
> + /* disable device ref_clk */
> +
> ufs_qcom_phy_disable_dev_ref_clk(host->generic_phy);
> + }
> + vote = host->bus_vote.min_bw_vote;
> + }
> +
> + err = ufs_qcom_set_bus_vote(host, vote);
> + if (err)
> + dev_err(hba->dev, "%s: set bus vote failed %d\n",
> + __func__, err);
> +
> +out:
> + return err;
> +}
> +
> +static ssize_t
> +show_ufs_to_mem_max_bus_bw(struct device *dev, struct device_attribute
> *attr,
> + char *buf)
> +{
> + struct ufs_hba *hba = dev_get_drvdata(dev);
> + struct ufs_qcom_host *host = hba->priv;
> +
> + return snprintf(buf, PAGE_SIZE, "%u\n",
> + host->bus_vote.is_max_bw_needed);
> +}
> +
> +static ssize_t
> +store_ufs_to_mem_max_bus_bw(struct device *dev, struct device_attribute
> *attr,
> + const char *buf, size_t count)
> +{
> + struct ufs_hba *hba = dev_get_drvdata(dev);
> + struct ufs_qcom_host *host = hba->priv;
> + uint32_t value;
> +
> + if (!kstrtou32(buf, 0, &value)) {
> + host->bus_vote.is_max_bw_needed = !!value;
> + ufs_qcom_update_bus_bw_vote(host);
> + }
> +
> + return count;
> +}
> +
> +static int ufs_qcom_bus_register(struct ufs_qcom_host *host)
> +{
> + int err;
> + struct device *dev = host->hba->dev;
> + struct device_node *np = dev->of_node;
> +
> + err = of_property_count_strings(np, "qcom,bus-vector-names");
> + if (err < 0 ) {
> + dev_err(dev, "%s: qcom,bus-vector-names not specified
> correctly %d\n",
> + __func__, err);
> + goto out;
> + }
> +
> + /* cache the vote index for minimum and maximum bandwidth */
> + host->bus_vote.min_bw_vote = ufs_qcom_get_bus_vote(host, "MIN");
> + host->bus_vote.max_bw_vote = ufs_qcom_get_bus_vote(host, "MAX");
> +
> + host->bus_vote.max_bus_bw.show = show_ufs_to_mem_max_bus_bw;
> + host->bus_vote.max_bus_bw.store = store_ufs_to_mem_max_bus_bw;
> + sysfs_attr_init(&host->bus_vote.max_bus_bw.attr);
> + host->bus_vote.max_bus_bw.attr.name = "max_bus_bw";
> + host->bus_vote.max_bus_bw.attr.mode = S_IRUGO | S_IWUSR;
> + err = device_create_file(dev, &host->bus_vote.max_bus_bw);
> +out:
> + return err;
> +}
> +
> +#define ANDROID_BOOT_DEV_MAX 30
> +static char android_boot_dev[ANDROID_BOOT_DEV_MAX];
> +static int get_android_boot_dev(char *str)
> +{
> + strlcpy(android_boot_dev, str, ANDROID_BOOT_DEV_MAX);
> + return 1;
> +}
> +__setup("androidboot.bootdevice=", get_android_boot_dev);
> +
> +/**
> + * ufs_qcom_init - bind phy with controller
> + * @hba: host controller instance
> + *
> + * Binds PHY with controller and powers up PHY enabling clocks
> + * and regulators.
> + *
> + * Returns -EPROBE_DEFER if binding fails, returns negative error
> + * on phy power up failure and returns zero on success.
> + */
> +static int ufs_qcom_init(struct ufs_hba *hba)
> +{
> + int err;
> + struct device *dev = hba->dev;
> + struct ufs_qcom_host *host;
> +
> + if (strlen(android_boot_dev) && strcmp(android_boot_dev,
> dev_name(dev)))
> + return -ENODEV;
> +
> + host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);
> + if (!host) {
> + err = -ENOMEM;
> + dev_err(dev, "%s: no memory for qcom ufs host\n",
> __func__);
> + goto out;
> + }
> +
> + host->hba = hba;
> + hba->priv = (void *)host;
> +
> + host->generic_phy = devm_phy_get(dev, "ufsphy");
> +
> + if (IS_ERR(host->generic_phy)) {
> + err = PTR_ERR(host->generic_phy);
> + dev_err(dev, "%s: PHY get failed %d\n", __func__, err);
> + goto out;
> + }
> +
> + err = ufs_qcom_bus_register(host);
> + if (err)
> + goto out_host_free;
> +
> + phy_init(host->generic_phy);
> + err = phy_power_on(host->generic_phy);
> + if (err)
> + goto out_unregister_bus;
> +
> + err = ufs_qcom_init_lane_clks(host);
> + if (err)
> + goto out_disable_phy;
> +
> + ufs_qcom_advertise_quirks(hba);
> +
> + hba->caps |= UFSHCD_CAP_CLK_GATING | UFSHCD_CAP_CLK_SCALING;
> + hba->caps |= UFSHCD_CAP_AUTO_BKOPS_SUSPEND;
> +
> + ufs_qcom_setup_clocks(hba, true);
> +
> + if (hba->dev->id < MAX_UFS_QCOM_HOSTS)
> + ufs_qcom_hosts[hba->dev->id] = host;
> +
> + goto out;
> +
> +out_disable_phy:
> + phy_power_off(host->generic_phy);
> +out_unregister_bus:
> + phy_exit(host->generic_phy);
> +out_host_free:
> + devm_kfree(dev, host);
> + hba->priv = NULL;
> +out:
> + return err;
> +}
> +
> +static void ufs_qcom_exit(struct ufs_hba *hba)
> +{
> + struct ufs_qcom_host *host = hba->priv;
> +
> + ufs_qcom_disable_lane_clks(host);
> + phy_power_off(host->generic_phy);
> +}
> +
> +static
> +void ufs_qcom_clk_scale_notify(struct ufs_hba *hba)
> +{
> + struct ufs_qcom_host *host = hba->priv;
> + struct ufs_pa_layer_attr *dev_req_params = &host->dev_req_params;
> +
> + if (!dev_req_params)
> + return;
> +
> + ufs_qcom_cfg_timers(hba, dev_req_params->gear_rx,
> + dev_req_params->pwr_rx,
> + dev_req_params->hs_rate);
> +}
> +
> +/**
> + * struct ufs_hba_qcom_vops - UFS QCOM specific variant operations
> + *
> + * The variant operations configure the necessary controller and PHY
> + * handshake during initialization.
> + */
> +static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = {
> + .name = "qcom",
> + .init = ufs_qcom_init,
> + .exit = ufs_qcom_exit,
> + .clk_scale_notify = ufs_qcom_clk_scale_notify,
> + .setup_clocks = ufs_qcom_setup_clocks,
> + .hce_enable_notify = ufs_qcom_hce_enable_notify,
> + .link_startup_notify = ufs_qcom_link_startup_notify,
> + .pwr_change_notify = ufs_qcom_pwr_change_notify,
> + .suspend = ufs_qcom_suspend,
> + .resume = ufs_qcom_resume,
> +};
> +EXPORT_SYMBOL(ufs_hba_qcom_vops);
> diff --git a/drivers/scsi/ufs/ufs-qcom.h b/drivers/scsi/ufs/ufs-qcom.h
> new file mode 100644
> index 0000000..9a6febd
> --- /dev/null
> +++ b/drivers/scsi/ufs/ufs-qcom.h
> @@ -0,0 +1,170 @@
> +/* Copyright (c) 2013-2015, 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.
> + *
> + */
> +
> +#ifndef UFS_QCOM_H_
> +#define UFS_QCOM_H_
> +
> +#define MAX_UFS_QCOM_HOSTS 1
> +#define MAX_U32 (~(u32)0)
> +#define MPHY_TX_FSM_STATE 0x41
> +#define TX_FSM_HIBERN8 0x1
> +#define HBRN8_POLL_TOUT_MS 100
> +#define DEFAULT_CLK_RATE_HZ 1000000
> +#define BUS_VECTOR_NAME_LEN 32
> +
> +#define UFS_HW_VER_MAJOR_SHFT (28)
> +#define UFS_HW_VER_MAJOR_MASK (0x000F << UFS_HW_VER_MAJOR_SHFT)
> +#define UFS_HW_VER_MINOR_SHFT (16)
> +#define UFS_HW_VER_MINOR_MASK (0x0FFF << UFS_HW_VER_MINOR_SHFT)
> +#define UFS_HW_VER_STEP_SHFT (0)
> +#define UFS_HW_VER_STEP_MASK (0xFFFF << UFS_HW_VER_STEP_SHFT)
> +
> +/* vendor specific pre-defined parameters */
> +#define SLOW 1
> +#define FAST 2
> +
> +#define UFS_QCOM_LIMIT_NUM_LANES_RX 2
> +#define UFS_QCOM_LIMIT_NUM_LANES_TX 2
> +#define UFS_QCOM_LIMIT_HSGEAR_RX UFS_HS_G2
> +#define UFS_QCOM_LIMIT_HSGEAR_TX UFS_HS_G2
> +#define UFS_QCOM_LIMIT_PWMGEAR_RX UFS_PWM_G4
> +#define UFS_QCOM_LIMIT_PWMGEAR_TX UFS_PWM_G4
> +#define UFS_QCOM_LIMIT_RX_PWR_PWM SLOW_MODE
> +#define UFS_QCOM_LIMIT_TX_PWR_PWM SLOW_MODE
> +#define UFS_QCOM_LIMIT_RX_PWR_HS FAST_MODE
> +#define UFS_QCOM_LIMIT_TX_PWR_HS FAST_MODE
> +#define UFS_QCOM_LIMIT_HS_RATE PA_HS_MODE_B
> +#define UFS_QCOM_LIMIT_DESIRED_MODE FAST
> +
> +/* QCOM UFS host controller vendor specific registers */
> +enum {
> + REG_UFS_SYS1CLK_1US = 0xC0,
> + REG_UFS_TX_SYMBOL_CLK_NS_US = 0xC4,
> + REG_UFS_LOCAL_PORT_ID_REG = 0xC8,
> + REG_UFS_PA_ERR_CODE = 0xCC,
> + REG_UFS_RETRY_TIMER_REG = 0xD0,
> + REG_UFS_PA_LINK_STARTUP_TIMER = 0xD8,
> + REG_UFS_CFG1 = 0xDC,
> + REG_UFS_CFG2 = 0xE0,
> + REG_UFS_HW_VERSION = 0xE4,
> +
> + UFS_DBG_RD_REG_UAWM = 0x100,
> + UFS_DBG_RD_REG_UARM = 0x200,
> + UFS_DBG_RD_REG_TXUC = 0x300,
> + UFS_DBG_RD_REG_RXUC = 0x400,
> + UFS_DBG_RD_REG_DFC = 0x500,
> + UFS_DBG_RD_REG_TRLUT = 0x600,
> + UFS_DBG_RD_REG_TMRLUT = 0x700,
> + UFS_UFS_DBG_RD_REG_OCSC = 0x800,
> +
> + UFS_UFS_DBG_RD_DESC_RAM = 0x1500,
> + UFS_UFS_DBG_RD_PRDT_RAM = 0x1700,
> + UFS_UFS_DBG_RD_RESP_RAM = 0x1800,
> + UFS_UFS_DBG_RD_EDTL_RAM = 0x1900,
> +};
> +
> +/* bit definitions for REG_UFS_CFG2 register */
> +#define UAWM_HW_CGC_EN (1 << 0)
> +#define UARM_HW_CGC_EN (1 << 1)
> +#define TXUC_HW_CGC_EN (1 << 2)
> +#define RXUC_HW_CGC_EN (1 << 3)
> +#define DFC_HW_CGC_EN (1 << 4)
> +#define TRLUT_HW_CGC_EN (1 << 5)
> +#define TMRLUT_HW_CGC_EN (1 << 6)
> +#define OCSC_HW_CGC_EN (1 << 7)
> +
> +#define REG_UFS_CFG2_CGC_EN_ALL (UAWM_HW_CGC_EN | UARM_HW_CGC_EN |\
> + TXUC_HW_CGC_EN | RXUC_HW_CGC_EN |\
> + DFC_HW_CGC_EN | TRLUT_HW_CGC_EN |\
> + TMRLUT_HW_CGC_EN | OCSC_HW_CGC_EN)
> +
> +/* bit offset */
> +enum {
> + OFFSET_UFS_PHY_SOFT_RESET = 1,
> + OFFSET_CLK_NS_REG = 10,
> +};
> +
> +/* bit masks */
> +enum {
> + MASK_UFS_PHY_SOFT_RESET = 0x2,
> + MASK_TX_SYMBOL_CLK_1US_REG = 0x3FF,
> + MASK_CLK_NS_REG = 0xFFFC00,
> +};
> +
> +enum ufs_qcom_phy_init_type {
> + UFS_PHY_INIT_FULL,
> + UFS_PHY_INIT_CFG_RESTORE,
> +};
> +
> +static inline void
> +ufs_qcom_get_controller_revision(struct ufs_hba *hba,
> + u8 *major, u16 *minor, u16 *step)
> +{
> + u32 ver = ufshcd_readl(hba, REG_UFS_HW_VERSION);
> +
> + *major = (ver & UFS_HW_VER_MAJOR_MASK) >> UFS_HW_VER_MAJOR_SHFT;
> + *minor = (ver & UFS_HW_VER_MINOR_MASK) >> UFS_HW_VER_MINOR_SHFT;
> + *step = (ver & UFS_HW_VER_STEP_MASK) >> UFS_HW_VER_STEP_SHFT;
> +};
> +
> +static inline void ufs_qcom_assert_reset(struct ufs_hba *hba)
> +{
> + ufshcd_rmwl(hba, MASK_UFS_PHY_SOFT_RESET,
> + 1 << OFFSET_UFS_PHY_SOFT_RESET, REG_UFS_CFG1);
> +
> + /*
> + * Make sure assertion of ufs phy reset is written to
> + * register before returning
> + */
> + mb();
> +}
> +
> +static inline void ufs_qcom_deassert_reset(struct ufs_hba *hba)
> +{
> + ufshcd_rmwl(hba, MASK_UFS_PHY_SOFT_RESET,
> + 0 << OFFSET_UFS_PHY_SOFT_RESET, REG_UFS_CFG1);
> +
> + /*
> + * Make sure de-assertion of ufs phy reset is written to
> + * register before returning
> + */
> + mb();
> +}
> +
> +struct ufs_qcom_bus_vote {
> + uint32_t client_handle;
> + uint32_t curr_vote;
> + int min_bw_vote;
> + int max_bw_vote;
> + int saved_vote;
> + bool is_max_bw_needed;
> + struct device_attribute max_bus_bw;
> +};
> +
> +struct ufs_qcom_host {
> + struct phy *generic_phy;
> + struct ufs_hba *hba;
> + struct ufs_qcom_bus_vote bus_vote;
> + struct ufs_pa_layer_attr dev_req_params;
> + struct clk *rx_l0_sync_clk;
> + struct clk *tx_l0_sync_clk;
> + struct clk *rx_l1_sync_clk;
> + struct clk *tx_l1_sync_clk;
> + bool is_lane_clks_enabled;
> +};
> +
> +#define ufs_qcom_is_link_off(hba) ufshcd_is_link_off(hba)
> +#define ufs_qcom_is_link_active(hba) ufshcd_is_link_active(hba)
> +#define ufs_qcom_is_link_hibern8(hba) ufshcd_is_link_hibern8(hba)
> +
> +#endif /* UFS_QCOM_H_ */
> --
> 1.8.5.2
>
> --
> QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a member
> of Code Aurora Forum, hosted by The Linux Foundation
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