回复: [PATCH V1 1/1]mmc:sdhci-bayhub:fix Qualcomm sd host 845 SD card compatibility issue

[Chevron Li (WH)]

Hi, Adrian&Ulf,

Can you give some comments for this patch?
Your suggestion is important for us.
We look forward to hearing from you.

-----邮件原件-----
发件人: Chevron Li (WH) <chevron.li@xxxxxxxxxxxxxx> 
发送时间: Wednesday, July 14, 2021 9:08 AM
收件人: adrian.hunter@xxxxxxxxx; ulf.hansson@xxxxxxxxxx; linux-mmc@xxxxxxxxxxxxxxx; linux.kernel@xxxxxxxxxxxxxxx
抄送: Shaper Liu (WH) <shaper.liu@xxxxxxxxxxxxxx>; Chevron Li (WH) <chevron.li@xxxxxxxxxxxxxx>; Xiaoguang Yu (WH) <xiaoguang.yu@xxxxxxxxxxxxxx>; Shirley Her (SC) <shirley.her@xxxxxxxxxxxxxx>
主题: [PATCH V1 1/1]mmc:sdhci-bayhub:fix Qualcomm sd host 845 SD card compatibility issue

Improve the signal integrity for long SD bus trace by using 845+BH201 SD host redriver chip

Signed-off-by: chevron.li <chevron.li@xxxxxxxxxxxxxx>
---
change in V1:
1. copy Qualcomm driver base from sdhci-msm.c to sdhci-bayhub.c
2. implement the BH201 chip initialization function at sdhci-bayhub.c
3. implement the BH201 chip power control function at sdhci-bayhub.c
4. implement the BH201 chip tuning function at sdhci-bayhub.c
5. re-implement mmc_rescan to match BH201 mode switch flow at sdhci-bayhub.c
---
---
 .../devicetree/bindings/mmc/sdhci-msm.txt     |    1 +
 drivers/mmc/host/Makefile                     |    1 +
 drivers/mmc/host/sdhci-bayhub.c               | 6563 +++++++++++++++++
 3 files changed, 6565 insertions(+)
 create mode 100644 drivers/mmc/host/sdhci-bayhub.c

diff --git a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
index 4c7fa6a4ed15..a0401dc16929 100644
--- a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
+++ b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt
@@ -20,6 +20,7 @@ Required properties:
 		"qcom,qcs404-sdhci", "qcom,sdhci-msm-v5"
 		"qcom,sc7180-sdhci", "qcom,sdhci-msm-v5";
 		"qcom,sdm845-sdhci", "qcom,sdhci-msm-v5"
+		"qcom,sdm845-bayhub-sdhci", "qcom,sdhci-msm-bayhub-v5"
 		"qcom,sdx55-sdhci", "qcom,sdhci-msm-v5";
 		"qcom,sm8250-sdhci", "qcom,sdhci-msm-v5"
 	NOTE that some old device tree files may be floating around that only
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 14004cc09aaa..d4d6f4cca732 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -93,6 +93,7 @@ obj-$(CONFIG_MMC_SDHCI_OF_SPARX5)	+= sdhci-of-sparx5.o
 obj-$(CONFIG_MMC_SDHCI_BCM_KONA)	+= sdhci-bcm-kona.o
 obj-$(CONFIG_MMC_SDHCI_IPROC)		+= sdhci-iproc.o
 obj-$(CONFIG_MMC_SDHCI_MSM)		+= sdhci-msm.o
+obj-$(CONFIG_MMC_SDHCI_MSM)		+= sdhci-bayhub.o
 obj-$(CONFIG_MMC_SDHCI_ST)		+= sdhci-st.o
 obj-$(CONFIG_MMC_SDHCI_MICROCHIP_PIC32)	+= sdhci-pic32.o
 obj-$(CONFIG_MMC_SDHCI_BRCMSTB)		+= sdhci-brcmstb.o
diff --git a/drivers/mmc/host/sdhci-bayhub.c b/drivers/mmc/host/sdhci-bayhub.c
new file mode 100644
index 000000000000..75029470bd22
--- /dev/null
+++ b/drivers/mmc/host/sdhci-bayhub.c
@@ -0,0 +1,6563 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Bayhub Technologies, Inc. BH201 SDHCI bridge IC for
+ * VENDOR SDHCI platform driver source file
+ *
+ * Copyright (c) 2012-2018, 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/module.h>
+#include <linux/of_device.h>
+#include <linux/delay.h>
+#include <linux/mmc/mmc.h>
+#include <linux/pm_runtime.h>
+#include <linux/pm_opp.h>
+#include <linux/slab.h>
+#include <linux/iopoll.h>
+#include <linux/regulator/consumer.h>
+#include <linux/interconnect.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/sd.h>
+#include <linux/io.h>
+#include <linux/of_gpio.h>
+
+#include "sdhci-pltfm.h"
+#include "cqhci.h"
+#include "../core/core.h"
+#include "../core/sd_ops.h"
+#include "../core/sdio_ops.h"
+#include "../core/mmc_ops.h"
+#include "../core/sd.h"
+#include "../core/bus.h"
+#include "../core/host.h"
+#include "../core/card.h"
+#include "../core/pwrseq.h"
+
+#define TRUE	1
+#define FALSE	0
+
+#define	SD_FNC_AM_SDR50		0x2
+#define	SD_FNC_AM_SDR104	0x3
+#define BIT_PASS_MASK  (0x7ff)
+#define SDR104_MANUAL_INJECT 0x3ff
+#define SDR50_MANUAL_INJECT  0x77f
+
+#define	TRUNING_RING_IDX(x)  ((x) % TUNING_PHASE_SIZE)
+#define	GET_IDX_VALUE(tb, x)  (tb & (1 << (x)))
+#define	GENERATE_IDX_VALUE(x)  (1 << (x))
+#define	GET_TRUNING_RING_IDX_VALUE(tb, x) \
+	(tb & (1 << TRUNING_RING_IDX(x)))
+#define	GENERATE_TRUNING_RING_IDX_VALUE(x) \
+	(1 << TRUNING_RING_IDX(x))
+#define	MAX_CFG_BIT_VAL (383)
+
+#define CORE_MCI_VERSION		0x50
+#define CORE_VERSION_MAJOR_SHIFT	28
+#define CORE_VERSION_MAJOR_MASK		(0xf << CORE_VERSION_MAJOR_SHIFT)
+#define CORE_VERSION_MINOR_MASK		0xff
+
+#define CORE_MCI_GENERICS		0x70
+#define SWITCHABLE_SIGNALING_VOLTAGE	BIT(29)
+
+#define HC_MODE_EN		0x1
+#define CORE_POWER		0x0
+#define CORE_SW_RST		BIT(7)
+#define FF_CLK_SW_RST_DIS	BIT(13)
+
+#define CORE_PWRCTL_BUS_OFF	BIT(0)
+#define CORE_PWRCTL_BUS_ON	BIT(1)
+#define CORE_PWRCTL_IO_LOW	BIT(2)
+#define CORE_PWRCTL_IO_HIGH	BIT(3)
+#define CORE_PWRCTL_BUS_SUCCESS BIT(0)
+#define CORE_PWRCTL_BUS_FAIL    BIT(1)
+#define CORE_PWRCTL_IO_SUCCESS	BIT(2)
+#define CORE_PWRCTL_IO_FAIL     BIT(3)
+#define REQ_BUS_OFF		BIT(0)
+#define REQ_BUS_ON		BIT(1)
+#define REQ_IO_LOW		BIT(2)
+#define REQ_IO_HIGH		BIT(3)
+#define INT_MASK		0xf
+#define MAX_PHASES		16
+#define CORE_DLL_LOCK		BIT(7)
+#define CORE_DDR_DLL_LOCK	BIT(11)
+#define CORE_DLL_EN		BIT(16)
+#define CORE_CDR_EN		BIT(17)
+#define CORE_CK_OUT_EN		BIT(18)
+#define CORE_CDR_EXT_EN		BIT(19)
+#define CORE_DLL_PDN		BIT(29)
+#define CORE_DLL_RST		BIT(30)
+#define CORE_CMD_DAT_TRACK_SEL	BIT(0)
+
+#define CORE_DDR_CAL_EN		BIT(0)
+#define CORE_FLL_CYCLE_CNT	BIT(18)
+#define CORE_DLL_CLOCK_DISABLE	BIT(21)
+
+#define DLL_USR_CTL_POR_VAL	0x10800
+#define ENABLE_DLL_LOCK_STATUS	BIT(26)
+#define FINE_TUNE_MODE_EN	BIT(27)
+#define BIAS_OK_SIGNAL		BIT(29)
+
+#define DLL_CONFIG_3_LOW_FREQ_VAL	0x08
+#define DLL_CONFIG_3_HIGH_FREQ_VAL	0x10
+
+#define CORE_VENDOR_SPEC_POR_VAL 0xa9c
+#define CORE_CLK_PWRSAVE	BIT(1)
+#define CORE_HC_MCLK_SEL_DFLT	(2 << 8)
+#define CORE_HC_MCLK_SEL_HS400	(3 << 8)
+#define CORE_HC_MCLK_SEL_MASK	(3 << 8)
+#define CORE_IO_PAD_PWR_SWITCH_EN	BIT(15)
+#define CORE_IO_PAD_PWR_SWITCH	BIT(16)
+#define CORE_HC_SELECT_IN_EN	BIT(18)
+#define CORE_HC_SELECT_IN_HS400	(6 << 19)
+#define CORE_HC_SELECT_IN_MASK	(7 << 19)
+
+#define CORE_3_0V_SUPPORT	BIT(25)
+#define CORE_1_8V_SUPPORT	BIT(26)
+#define CORE_VOLT_SUPPORT	(CORE_3_0V_SUPPORT | CORE_1_8V_SUPPORT)
+
+#define CORE_CSR_CDC_CTLR_CFG0		0x130
+#define CORE_SW_TRIG_FULL_CALIB		BIT(16)
+#define CORE_HW_AUTOCAL_ENA		BIT(17)
+
+#define CORE_CSR_CDC_CTLR_CFG1		0x134
+#define CORE_CSR_CDC_CAL_TIMER_CFG0	0x138
+#define CORE_TIMER_ENA			BIT(16)
+
+#define CORE_CSR_CDC_CAL_TIMER_CFG1	0x13C
+#define CORE_CSR_CDC_REFCOUNT_CFG	0x140
+#define CORE_CSR_CDC_COARSE_CAL_CFG	0x144
+#define CORE_CDC_OFFSET_CFG		0x14C
+#define CORE_CSR_CDC_DELAY_CFG		0x150
+#define CORE_CDC_SLAVE_DDA_CFG		0x160
+#define CORE_CSR_CDC_STATUS0		0x164
+#define CORE_CALIBRATION_DONE		BIT(0)
+
+#define CORE_CDC_ERROR_CODE_MASK	0x7000000
+
+#define CORE_CSR_CDC_GEN_CFG		0x178
+#define CORE_CDC_SWITCH_BYPASS_OFF	BIT(0)
+#define CORE_CDC_SWITCH_RC_EN		BIT(1)
+
+#define CORE_CDC_T4_DLY_SEL		BIT(0)
+#define CORE_CMDIN_RCLK_EN		BIT(1)
+#define CORE_START_CDC_TRAFFIC		BIT(6)
+
+#define CORE_PWRSAVE_DLL	BIT(3)
+
+#define DDR_CONFIG_POR_VAL	0x80040873
+
+
+#define INVALID_TUNING_PHASE	-1
+#define SDHCI_MSM_MIN_CLOCK	400000
+#define CORE_FREQ_100MHZ	(100 * 1000 * 1000)
+
+#define CDR_SELEXT_SHIFT	20
+#define CDR_SELEXT_MASK		(0xf << CDR_SELEXT_SHIFT)
+#define CMUX_SHIFT_PHASE_SHIFT	24
+#define CMUX_SHIFT_PHASE_MASK	(7 << CMUX_SHIFT_PHASE_SHIFT)
+
+#define MSM_MMC_AUTOSUSPEND_DELAY_MS	50
+
+/* Timeout value to avoid infinite waiting for pwr_irq */
+#define MSM_PWR_IRQ_TIMEOUT_MS 5000
+
+/* Max load for eMMC Vdd-io supply */
+#define MMC_VQMMC_MAX_LOAD_UA	325000
+
+#define msm_bayhub_host_readl(msm_bayhub_host, host, offset) \
+	msm_bayhub_host->var_ops->msm_bayhub_readl_relaxed(host, offset)
+
+#define msm_bayhub_host_writel(msm_bayhub_host, val, host, offset) \
+	msm_bayhub_host->var_ops->msm_bayhub_writel_relaxed(val, host, offset)
+
+/* CQHCI vendor specific registers */
+#define CQHCI_VENDOR_CFG1	0xA00
+#define CQHCI_VENDOR_DIS_RST_ON_CQ_EN	(0x3 << 13)
+
+#define TUNING_PHASE_SIZE	11
+#define GGC_CFG_DATA {0x07000000, 0x07364022, 0x01015412, 0x01062400,\
+	0x10400076, 0x00025432, 0x01046076, 0x62011000,\
+	0x30503106, 0x64141711, 0x10057513, 0x00336200,\
+	0x00020006, 0x40000400, 0x12200310, 0x3A314177}
+
+struct ggc_bus_mode_cfg_t {
+	u32 tx_selb_tb[TUNING_PHASE_SIZE];
+	u32 all_selb_tb[TUNING_PHASE_SIZE];
+	u32 tx_selb_failed_history;
+	int bus_mode;
+	int default_sela;
+	int default_selb;
+	u32 default_delaycode;
+	u32 dll_voltage_unlock_cnt[4];
+	u32 max_delaycode;
+	u32 min_delaycode;
+	u32 delaycode_narrowdown_index;
+	u32 fail_phase;
+};
+
+enum tuning_stat_et {
+	NO_TUNING = 0,
+	OUTPUT_PASS_TYPE = 1,
+	SET_PHASE_FAIL_TYPE = 2,
+	TUNING_FAIL_TYPE = 3,
+	READ_STATUS_FAIL_TYPE = 4,
+	TUNING_CMD7_TIMEOUT = 5,
+	RETUNING_CASE = 6,
+};
+
+
+struct t_gg_reg_strt {
+	u32 ofs;
+	u32 mask;
+	u32 value;
+};
+
+struct rl_bit_lct {
+	u8 bits;
+	u8 rl_bits;
+};
+
+struct chk_type_t {
+	u8 right_valid:1;
+	u8 first_valid:1;
+	u8 record_valid:1;
+	u8 reserved:5;
+};
+
+static const char *const op_dbg_str[] = {
+	"no tuning",
+	"pass",
+	"set_phase_fail",
+	"tuning fail",
+	"read status fail",
+	"tuning CMD7 timeout",
+	"retuning case"
+};
+
+struct ggc_platform_t {
+	struct ggc_bus_mode_cfg_t sdr50;
+	struct ggc_bus_mode_cfg_t sdr104;
+	struct ggc_bus_mode_cfg_t *cur_bus_mode;
+
+	struct t_gg_reg_strt pha_stas_rx_low32;
+	struct t_gg_reg_strt pha_stas_rx_high32;
+	struct t_gg_reg_strt pha_stas_tx_low32;
+	struct t_gg_reg_strt pha_stas_tx_high32;
+	struct t_gg_reg_strt dll_sela_after_mask;
+	struct t_gg_reg_strt dll_selb_after_mask;
+
+	struct t_gg_reg_strt dll_delay_100m_backup;
+	struct t_gg_reg_strt dll_delay_200m_backup;
+
+	struct t_gg_reg_strt dll_sela_100m_cfg;
+	struct t_gg_reg_strt dll_sela_200m_cfg;
+	struct t_gg_reg_strt dll_selb_100m_cfg;
+	struct t_gg_reg_strt dll_selb_200m_cfg;
+	struct t_gg_reg_strt dll_selb_100m_cfg_en;
+	struct t_gg_reg_strt dll_selb_200m_cfg_en;
+	struct t_gg_reg_strt internl_tuning_en_100m;
+	struct t_gg_reg_strt internl_tuning_en_200m;
+	struct t_gg_reg_strt cmd19_cnt_cfg;
+
+	struct t_gg_reg_strt inject_failure_for_tuning_enable_cfg;
+	struct t_gg_reg_strt inject_failure_for_200m_tuning_cfg;
+	struct t_gg_reg_strt inject_failure_for_100m_tuning_cfg;
+
+	int def_sela_100m;
+	int def_sela_200m;
+	int def_selb_100m;
+	int def_selb_200m;
+
+	u32 _gg_reg_cur[16];
+	u8 _cur_read_buf[512];
+
+	bool dll_unlock_reinit_flg;
+	u8 driver_strength_reinit_flg;
+	bool tuning_cmd7_timeout_reinit_flg;
+	u32 tuning_cmd7_timeout_reinit_cnt;
+	u32 ggc_cur_sela;
+	bool selx_tuning_done_flag;
+	u32 ggc_cmd_tx_selb_failed_range;
+	int ggc_sw_selb_tuning_first_selb;
+	enum tuning_stat_et ggc_sela_tuning_result[11];
+	int dll_voltage_scan_map[4];
+	int cur_dll_voltage_idx;
+	int sdr50_notuning_sela_inject_flag;
+	int sdr50_notuning_crc_error_flag;
+	u32 sdr50_notuning_sela_rx_inject;
+	u32 bh201_sdr50_sela_sw_inject;
+	u32 bh201_sdr50_selb_hw_inject;
+	u32 bh201_sdr104_selb_hw_inject;
+	u32 bh201_drive_strength;
+	bool tuning_in_progress;
+	int bh201_used;
+	int pwr_gpio; /* External power enable pin for Redriver IC */
+	int det_gpio;
+};
+
+struct sdhci_msm_bayhub_offset {
+	u32 core_hc_mode;
+	u32 core_mci_data_cnt;
+	u32 core_mci_status;
+	u32 core_mci_fifo_cnt;
+	u32 core_mci_version;
+	u32 core_generics;
+	u32 core_testbus_config;
+	u32 core_testbus_sel2_bit;
+	u32 core_testbus_ena;
+	u32 core_testbus_sel2;
+	u32 core_pwrctl_status;
+	u32 core_pwrctl_mask;
+	u32 core_pwrctl_clear;
+	u32 core_pwrctl_ctl;
+	u32 core_sdcc_debug_reg;
+	u32 core_dll_config;
+	u32 core_dll_status;
+	u32 core_vendor_spec;
+	u32 core_vendor_spec_adma_err_addr0;
+	u32 core_vendor_spec_adma_err_addr1;
+	u32 core_vendor_spec_func2;
+	u32 core_vendor_spec_capabilities0;
+	u32 core_ddr_200_cfg;
+	u32 core_vendor_spec3;
+	u32 core_dll_config_2;
+	u32 core_dll_config_3;
+	u32 core_ddr_config_old; /* Applicable to sdcc minor ver < 0x49 */
+	u32 core_ddr_config;
+	u32 core_dll_usr_ctl; /* Present on SDCC5.1 onwards */
+};
+
+static const struct sdhci_msm_bayhub_offset sdhci_msm_bayhub_v5_offset = {
+	.core_mci_data_cnt = 0x35c,
+	.core_mci_status = 0x324,
+	.core_mci_fifo_cnt = 0x308,
+	.core_mci_version = 0x318,
+	.core_generics = 0x320,
+	.core_testbus_config = 0x32c,
+	.core_testbus_sel2_bit = 3,
+	.core_testbus_ena = (1 << 31),
+	.core_testbus_sel2 = (1 << 3),
+	.core_pwrctl_status = 0x240,
+	.core_pwrctl_mask = 0x244,
+	.core_pwrctl_clear = 0x248,
+	.core_pwrctl_ctl = 0x24c,
+	.core_sdcc_debug_reg = 0x358,
+	.core_dll_config = 0x200,
+	.core_dll_status = 0x208,
+	.core_vendor_spec = 0x20c,
+	.core_vendor_spec_adma_err_addr0 = 0x214,
+	.core_vendor_spec_adma_err_addr1 = 0x218,
+	.core_vendor_spec_func2 = 0x210,
+	.core_vendor_spec_capabilities0 = 0x21c,
+	.core_ddr_200_cfg = 0x224,
+	.core_vendor_spec3 = 0x250,
+	.core_dll_config_2 = 0x254,
+	.core_dll_config_3 = 0x258,
+	.core_ddr_config = 0x25c,
+	.core_dll_usr_ctl = 0x388,
+};
+
+static const struct sdhci_msm_bayhub_offset sdhci_msm_bayhub_mci_offset = {
+	.core_hc_mode = 0x78,
+	.core_mci_data_cnt = 0x30,
+	.core_mci_status = 0x34,
+	.core_mci_fifo_cnt = 0x44,
+	.core_mci_version = 0x050,
+	.core_generics = 0x70,
+	.core_testbus_config = 0x0cc,
+	.core_testbus_sel2_bit = 4,
+	.core_testbus_ena = (1 << 3),
+	.core_testbus_sel2 = (1 << 4),
+	.core_pwrctl_status = 0xdc,
+	.core_pwrctl_mask = 0xe0,
+	.core_pwrctl_clear = 0xe4,
+	.core_pwrctl_ctl = 0xe8,
+	.core_sdcc_debug_reg = 0x124,
+	.core_dll_config = 0x100,
+	.core_dll_status = 0x108,
+	.core_vendor_spec = 0x10c,
+	.core_vendor_spec_adma_err_addr0 = 0x114,
+	.core_vendor_spec_adma_err_addr1 = 0x118,
+	.core_vendor_spec_func2 = 0x110,
+	.core_vendor_spec_capabilities0 = 0x11c,
+	.core_ddr_200_cfg = 0x184,
+	.core_vendor_spec3 = 0x1b0,
+	.core_dll_config_2 = 0x1b4,
+	.core_ddr_config_old = 0x1b8,
+	.core_ddr_config = 0x1bc,
+};
+
+struct sdhci_msm_bayhub_variant_ops {
+	u32 (*msm_bayhub_readl_relaxed)(struct sdhci_host *host, u32 offset);
+	void (*msm_bayhub_writel_relaxed)(u32 val, struct sdhci_host *host,
+			u32 offset);
+};
+
+/*
+ * From V5, register spaces have changed. Wrap this info in a structure
+ * and choose the data_structure based on version info mentioned in DT.
+ */
+struct sdhci_msm_bayhub_variant_info {
+	bool mci_removed;
+	bool restore_dll_config;
+	bool uses_tassadar_dll;
+	const struct sdhci_msm_bayhub_variant_ops *var_ops;
+	const struct sdhci_msm_bayhub_offset *offset;
+};
+
+struct sdhci_msm_bayhub_host {
+	struct platform_device *pdev;
+	void __iomem *core_mem;	/* MSM SDCC mapped address */
+	int pwr_irq;		/* power irq */
+	struct clk *bus_clk;	/* SDHC bus voter clock */
+	struct clk *xo_clk;	/* TCXO clk needed for FLL feature of cm_dll*/
+	struct clk_bulk_data bulk_clks[4]; /* core, iface, cal, sleep clocks */
+	unsigned long clk_rate;
+	struct mmc_host *mmc;
+	struct opp_table *opp_table;
+	bool has_opp_table;
+	bool use_14lpp_dll_reset;
+	bool tuning_done;
+	bool calibration_done;
+	u8 saved_tuning_phase;
+	bool use_cdclp533;
+	u32 curr_pwr_state;
+	u32 curr_io_level;
+	wait_queue_head_t pwr_irq_wait;
+	bool pwr_irq_flag;
+	u32 caps_0;
+	bool mci_removed;
+	bool restore_dll_config;
+	const struct sdhci_msm_bayhub_variant_ops *var_ops;
+	const struct sdhci_msm_bayhub_offset *offset;
+	bool use_cdr;
+	u32 transfer_mode;
+	bool updated_ddr_cfg;
+	bool uses_tassadar_dll;
+	u32 dll_config;
+	u32 ddr_config;
+	bool vqmmc_enabled;
+	struct ggc_platform_t  ggc;
+};
+
+static const struct sdhci_msm_bayhub_offset *sdhci_priv_msm_bayhub_offset(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+
+	return msm_bayhub_host->offset;
+}
+
+/*
+ * APIs to read/write to vendor specific registers which were there in the
+ * core_mem region before MCI was removed.
+ */
+static u32 sdhci_msm_bayhub_mci_variant_readl_relaxed(struct sdhci_host *host,
+		u32 offset)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+
+	return readl_relaxed(msm_bayhub_host->core_mem + offset);
+}
+
+static u32 sdhci_msm_bayhub_v5_variant_readl_relaxed(struct sdhci_host *host,
+		u32 offset)
+{
+	return readl_relaxed(host->ioaddr + offset);
+}
+
+static void sdhci_msm_bayhub_mci_variant_writel_relaxed(u32 val,
+		struct sdhci_host *host, u32 offset)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+
+	writel_relaxed(val, msm_bayhub_host->core_mem + offset);
+}
+
+static void sdhci_msm_bayhub_v5_variant_writel_relaxed(u32 val,
+		struct sdhci_host *host, u32 offset)
+{
+	writel_relaxed(val, host->ioaddr + offset);
+}
+
+static unsigned int msm_bayhub_get_clock_mult_for_bus_mode(struct sdhci_host *host)
+{
+	struct mmc_ios ios = host->mmc->ios;
+	/*
+	 * The SDHC requires internal clock frequency to be double the
+	 * actual clock that will be set for DDR mode. The controller
+	 * uses the faster clock(100/400MHz) for some of its parts and
+	 * send the actual required clock (50/200MHz) to the card.
+	 */
+	if (ios.timing == MMC_TIMING_UHS_DDR50 ||
+	    ios.timing == MMC_TIMING_MMC_DDR52 ||
+	    ios.timing == MMC_TIMING_MMC_HS400 ||
+	    host->flags & SDHCI_HS400_TUNING)
+		return 2;
+	return 1;
+}
+
+static void msm_bayhub_set_clock_rate_for_bus_mode(struct sdhci_host *host,
+					    unsigned int clock)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	struct mmc_ios curr_ios = host->mmc->ios;
+	struct clk *core_clk = msm_bayhub_host->bulk_clks[0].clk;
+	unsigned long achieved_rate;
+	unsigned int desired_rate;
+	unsigned int mult;
+	int rc;
+
+	mult = msm_bayhub_get_clock_mult_for_bus_mode(host);
+	desired_rate = clock * mult;
+	rc = dev_pm_opp_set_rate(mmc_dev(host->mmc), desired_rate);
+	if (rc) {
+		pr_err("%s: Failed to set clock at rate %u at timing %d\n",
+		       mmc_hostname(host->mmc), desired_rate, curr_ios.timing);
+		return;
+	}
+
+	/*
+	 * Qualcomm clock drivers by default round clock _up_ if they can't
+	 * make the requested rate.  This is not good for SD.  Yell if we
+	 * encounter it.
+	 */
+	achieved_rate = clk_get_rate(core_clk);
+	if (achieved_rate > desired_rate)
+		pr_warn("%s: Card appears overclocked; req %u Hz, actual %lu Hz\n",
+			mmc_hostname(host->mmc), desired_rate, achieved_rate);
+	host->mmc->actual_clock = achieved_rate / mult;
+
+	/* Stash the rate we requested to use in sdhci_msm_bayhub_runtime_resume() */
+	msm_bayhub_host->clk_rate = desired_rate;
+
+	pr_debug("%s: Setting clock at rate %lu at timing %d\n",
+		 mmc_hostname(host->mmc), achieved_rate, curr_ios.timing);
+}
+
+/* Platform specific tuning */
+static inline int msm_bayhub_dll_poll_ck_out_en(struct sdhci_host *host, u8 poll)
+{
+	u32 wait_cnt = 50;
+	u8 ck_out_en;
+	struct mmc_host *mmc = host->mmc;
+	const struct sdhci_msm_bayhub_offset *msm_bayhub_offset =
+					sdhci_priv_msm_bayhub_offset(host);
+
+	/* Poll for CK_OUT_EN bit.  max. poll time = 50us */
+	ck_out_en = !!(readl_relaxed(host->ioaddr +
+			msm_bayhub_offset->core_dll_config) & CORE_CK_OUT_EN);
+
+	while (ck_out_en != poll) {
+		if (--wait_cnt == 0) {
+			dev_err(mmc_dev(mmc), "%s: CK_OUT_EN bit is not %d\n",
+			       mmc_hostname(mmc), poll);
+			return -ETIMEDOUT;
+		}
+		udelay(1);
+
+		ck_out_en = !!(readl_relaxed(host->ioaddr +
+			msm_bayhub_offset->core_dll_config) & CORE_CK_OUT_EN);
+	}
+
+	return 0;
+}
+
+static int msm_bayhub_config_cm_dll_phase(struct sdhci_host *host, u8 phase)
+{
+	int rc;
+	static const u8 grey_coded_phase_table[] = {
+		0x0, 0x1, 0x3, 0x2, 0x6, 0x7, 0x5, 0x4,
+		0xc, 0xd, 0xf, 0xe, 0xa, 0xb, 0x9, 0x8
+	};
+	unsigned long flags;
+	u32 config;
+	struct mmc_host *mmc = host->mmc;
+	const struct sdhci_msm_bayhub_offset *msm_bayhub_offset =
+					sdhci_priv_msm_bayhub_offset(host);
+
+	if (phase > 0xf)
+		return -EINVAL;
+
+	spin_lock_irqsave(&host->lock, flags);
+
+	config = readl_relaxed(host->ioaddr + msm_bayhub_offset->core_dll_config);
+	config &= ~(CORE_CDR_EN | CORE_CK_OUT_EN);
+	config |= (CORE_CDR_EXT_EN | CORE_DLL_EN);
+	writel_relaxed(config, host->ioaddr + msm_bayhub_offset->core_dll_config);
+
+	/* Wait until CK_OUT_EN bit of DLL_CONFIG register becomes '0' */
+	rc = msm_bayhub_dll_poll_ck_out_en(host, 0);
+	if (rc)
+		goto err_out;
+
+	/*
+	 * Write the selected DLL clock output phase (0 ... 15)
+	 * to CDR_SELEXT bit field of DLL_CONFIG register.
+	 */
+	config = readl_relaxed(host->ioaddr + msm_bayhub_offset->core_dll_config);
+	config &= ~CDR_SELEXT_MASK;
+	config |= grey_coded_phase_table[phase] << CDR_SELEXT_SHIFT;
+	writel_relaxed(config, host->ioaddr + msm_bayhub_offset->core_dll_config);
+
+	config = readl_relaxed(host->ioaddr + msm_bayhub_offset->core_dll_config);
+	config |= CORE_CK_OUT_EN;
+	writel_relaxed(config, host->ioaddr + msm_bayhub_offset->core_dll_config);
+
+	/* Wait until CK_OUT_EN bit of DLL_CONFIG register becomes '1' */
+	rc = msm_bayhub_dll_poll_ck_out_en(host, 1);
+	if (rc)
+		goto err_out;
+
+	config = readl_relaxed(host->ioaddr + msm_bayhub_offset->core_dll_config);
+	config |= CORE_CDR_EN;
+	config &= ~CORE_CDR_EXT_EN;
+	writel_relaxed(config, host->ioaddr + msm_bayhub_offset->core_dll_config);
+	goto out;
+
+err_out:
+	dev_err(mmc_dev(mmc), "%s: Failed to set DLL phase: %d\n",
+	       mmc_hostname(mmc), phase);
+out:
+	spin_unlock_irqrestore(&host->lock, flags);
+	return rc;
+}
+
+/*
+ * Find out the greatest range of consecuitive selected
+ * DLL clock output phases that can be used as sampling
+ * setting for SD3.0 UHS-I card read operation (in SDR104
+ * timing mode) or for eMMC4.5 card read operation (in
+ * HS400/HS200 timing mode).
+ * Select the 3/4 of the range and configure the DLL with the
+ * selected DLL clock output phase.
+ */
+
+static int msm_bayhub_find_most_appropriate_phase(struct sdhci_host *host,
+					   u8 *phase_table, u8 total_phases)
+{
+	int ret;
+	u8 ranges[MAX_PHASES][MAX_PHASES] = { {0}, {0} };
+	u8 phases_per_row[MAX_PHASES] = { 0 };
+	int row_index = 0, col_index = 0, selected_row_index = 0, curr_max = 0;
+	int i, cnt, phase_0_raw_index = 0, phase_15_raw_index = 0;
+	bool phase_0_found = false, phase_15_found = false;
+	struct mmc_host *mmc = host->mmc;
+
+	if (!total_phases || (total_phases > MAX_PHASES)) {
+		dev_err(mmc_dev(mmc), "%s: Invalid argument: total_phases=%d\n",
+		       mmc_hostname(mmc), total_phases);
+		return -EINVAL;
+	}
+
+	for (cnt = 0; cnt < total_phases; cnt++) {
+		ranges[row_index][col_index] = phase_table[cnt];
+		phases_per_row[row_index] += 1;
+		col_index++;
+
+		if ((cnt + 1) == total_phases) {
+			continue;
+		/* check if next phase in phase_table is consecutive or not */
+		} else if ((phase_table[cnt] + 1) != phase_table[cnt + 1]) {
+			row_index++;
+			col_index = 0;
+		}
+	}
+
+	if (row_index >= MAX_PHASES)
+		return -EINVAL;
+
+	/* Check if phase-0 is present in first valid window? */
+	if (!ranges[0][0]) {
+		phase_0_found = true;
+		phase_0_raw_index = 0;
+		/* Check if cycle exist between 2 valid windows */
+		for (cnt = 1; cnt <= row_index; cnt++) {
+			if (phases_per_row[cnt]) {
+				for (i = 0; i < phases_per_row[cnt]; i++) {
+					if (ranges[cnt][i] == 15) {
+						phase_15_found = true;
+						phase_15_raw_index = cnt;
+						break;
+					}
+				}
+			}
+		}
+	}
+
+	/* If 2 valid windows form cycle then merge them as single window */
+	if (phase_0_found && phase_15_found) {
+		/* number of phases in raw where phase 0 is present */
+		u8 phases_0 = phases_per_row[phase_0_raw_index];
+		/* number of phases in raw where phase 15 is present */
+		u8 phases_15 = phases_per_row[phase_15_raw_index];
+
+		if (phases_0 + phases_15 >= MAX_PHASES)
+			/*
+			 * If there are more than 1 phase windows then total
+			 * number of phases in both the windows should not be
+			 * more than or equal to MAX_PHASES.
+			 */
+			return -EINVAL;
+
+		/* Merge 2 cyclic windows */
+		i = phases_15;
+		for (cnt = 0; cnt < phases_0; cnt++) {
+			ranges[phase_15_raw_index][i] =
+			    ranges[phase_0_raw_index][cnt];
+			if (++i >= MAX_PHASES)
+				break;
+		}
+
+		phases_per_row[phase_0_raw_index] = 0;
+		phases_per_row[phase_15_raw_index] = phases_15 + phases_0;
+	}
+
+	for (cnt = 0; cnt <= row_index; cnt++) {
+		if (phases_per_row[cnt] > curr_max) {
+			curr_max = phases_per_row[cnt];
+			selected_row_index = cnt;
+		}
+	}
+
+	i = (curr_max * 3) / 4;
+	if (i)
+		i--;
+
+	ret = ranges[selected_row_index][i];
+
+	if (ret >= MAX_PHASES) {
+		ret = -EINVAL;
+		dev_err(mmc_dev(mmc), "%s: Invalid phase selected=%d\n",
+		       mmc_hostname(mmc), ret);
+	}
+
+	return ret;
+}
+
+static inline void msm_bayhub_cm_dll_set_freq(struct sdhci_host *host)
+{
+	u32 mclk_freq = 0, config;
+	const struct sdhci_msm_bayhub_offset *msm_bayhub_offset =
+					sdhci_priv_msm_bayhub_offset(host);
+
+	/* Program the MCLK value to MCLK_FREQ bit field */
+	if (host->clock <= 112000000)
+		mclk_freq = 0;
+	else if (host->clock <= 125000000)
+		mclk_freq = 1;
+	else if (host->clock <= 137000000)
+		mclk_freq = 2;
+	else if (host->clock <= 150000000)
+		mclk_freq = 3;
+	else if (host->clock <= 162000000)
+		mclk_freq = 4;
+	else if (host->clock <= 175000000)
+		mclk_freq = 5;
+	else if (host->clock <= 187000000)
+		mclk_freq = 6;
+	else if (host->clock <= 200000000)
+		mclk_freq = 7;
+
+	config = readl_relaxed(host->ioaddr + msm_bayhub_offset->core_dll_config);
+	config &= ~CMUX_SHIFT_PHASE_MASK;
+	config |= mclk_freq << CMUX_SHIFT_PHASE_SHIFT;
+	writel_relaxed(config, host->ioaddr + msm_bayhub_offset->core_dll_config);
+}
+
+/* Initialize the DLL (Programmable Delay Line) */
+static int msm_bayhub_init_cm_dll(struct sdhci_host *host)
+{
+	struct mmc_host *mmc = host->mmc;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	int wait_cnt = 50;
+	unsigned long flags, xo_clk = 0;
+	u32 config;
+	const struct sdhci_msm_bayhub_offset *msm_bayhub_offset =
+					msm_bayhub_host->offset;
+
+	if (msm_bayhub_host->use_14lpp_dll_reset && !IS_ERR_OR_NULL(msm_bayhub_host->xo_clk))
+		xo_clk = clk_get_rate(msm_bayhub_host->xo_clk);
+
+	spin_lock_irqsave(&host->lock, flags);
+
+	/*
+	 * Make sure that clock is always enabled when DLL
+	 * tuning is in progress. Keeping PWRSAVE ON may
+	 * turn off the clock.
+	 */
+	config = readl_relaxed(host->ioaddr + msm_bayhub_offset->core_vendor_spec);
+	config &= ~CORE_CLK_PWRSAVE;
+	writel_relaxed(config, host->ioaddr + msm_bayhub_offset->core_vendor_spec);
+
+	if (msm_bayhub_host->dll_config)
+		writel_relaxed(msm_bayhub_host->dll_config,
+				host->ioaddr + msm_bayhub_offset->core_dll_config);
+
+	if (msm_bayhub_host->use_14lpp_dll_reset) {
+		config = readl_relaxed(host->ioaddr +
+				msm_bayhub_offset->core_dll_config);
+		config &= ~CORE_CK_OUT_EN;
+		writel_relaxed(config, host->ioaddr +
+				msm_bayhub_offset->core_dll_config);
+
+		config = readl_relaxed(host->ioaddr +
+				msm_bayhub_offset->core_dll_config_2);
+		config |= CORE_DLL_CLOCK_DISABLE;
+		writel_relaxed(config, host->ioaddr +
+				msm_bayhub_offset->core_dll_config_2);
+	}
+
+	config = readl_relaxed(host->ioaddr +
+			msm_bayhub_offset->core_dll_config);
+	config |= CORE_DLL_RST;
+	writel_relaxed(config, host->ioaddr +
+			msm_bayhub_offset->core_dll_config);
+
+	config = readl_relaxed(host->ioaddr +
+			msm_bayhub_offset->core_dll_config);
+	config |= CORE_DLL_PDN;
+	writel_relaxed(config, host->ioaddr +
+			msm_bayhub_offset->core_dll_config);
+
+	if (!msm_bayhub_host->dll_config)
+		msm_bayhub_cm_dll_set_freq(host);
+
+	if (msm_bayhub_host->use_14lpp_dll_reset &&
+	    !IS_ERR_OR_NULL(msm_bayhub_host->xo_clk)) {
+		u32 mclk_freq = 0;
+
+		config = readl_relaxed(host->ioaddr +
+				msm_bayhub_offset->core_dll_config_2);
+		config &= CORE_FLL_CYCLE_CNT;
+		if (config)
+			mclk_freq = DIV_ROUND_CLOSEST_ULL((host->clock * 8),
+					xo_clk);
+		else
+			mclk_freq = DIV_ROUND_CLOSEST_ULL((host->clock * 4),
+					xo_clk);
+
+		config = readl_relaxed(host->ioaddr +
+				msm_bayhub_offset->core_dll_config_2);
+		config &= ~(0xFF << 10);
+		config |= mclk_freq << 10;
+
+		writel_relaxed(config, host->ioaddr +
+				msm_bayhub_offset->core_dll_config_2);
+		/* wait for 5us before enabling DLL clock */
+		udelay(5);
+	}
+
+	config = readl_relaxed(host->ioaddr +
+			msm_bayhub_offset->core_dll_config);
+	config &= ~CORE_DLL_RST;
+	writel_relaxed(config, host->ioaddr +
+			msm_bayhub_offset->core_dll_config);
+
+	config = readl_relaxed(host->ioaddr +
+			msm_bayhub_offset->core_dll_config);
+	config &= ~CORE_DLL_PDN;
+	writel_relaxed(config, host->ioaddr +
+			msm_bayhub_offset->core_dll_config);
+
+	if (msm_bayhub_host->use_14lpp_dll_reset) {
+		if (!msm_bayhub_host->dll_config)
+			msm_bayhub_cm_dll_set_freq(host);
+		config = readl_relaxed(host->ioaddr +
+				msm_bayhub_offset->core_dll_config_2);
+		config &= ~CORE_DLL_CLOCK_DISABLE;
+		writel_relaxed(config, host->ioaddr +
+				msm_bayhub_offset->core_dll_config_2);
+	}
+
+	/*
+	 * Configure DLL user control register to enable DLL status.
+	 * This setting is applicable to SDCC v5.1 onwards only.
+	 */
+	if (msm_bayhub_host->uses_tassadar_dll) {
+		config = DLL_USR_CTL_POR_VAL | FINE_TUNE_MODE_EN |
+			ENABLE_DLL_LOCK_STATUS | BIAS_OK_SIGNAL;
+		writel_relaxed(config, host->ioaddr +
+				msm_bayhub_offset->core_dll_usr_ctl);
+
+		config = readl_relaxed(host->ioaddr +
+				msm_bayhub_offset->core_dll_config_3);
+		config &= ~0xFF;
+		if (msm_bayhub_host->clk_rate < 150000000)
+			config |= DLL_CONFIG_3_LOW_FREQ_VAL;
+		else
+			config |= DLL_CONFIG_3_HIGH_FREQ_VAL;
+		writel_relaxed(config, host->ioaddr +
+			msm_bayhub_offset->core_dll_config_3);
+	}
+
+	config = readl_relaxed(host->ioaddr +
+			msm_bayhub_offset->core_dll_config);
+	config |= CORE_DLL_EN;
+	writel_relaxed(config, host->ioaddr +
+			msm_bayhub_offset->core_dll_config);
+
+	config = readl_relaxed(host->ioaddr +
+			msm_bayhub_offset->core_dll_config);
+	config |= CORE_CK_OUT_EN;
+	writel_relaxed(config, host->ioaddr +
+			msm_bayhub_offset->core_dll_config);
+
+	/* Wait until DLL_LOCK bit of DLL_STATUS register becomes '1' */
+	while (!(readl_relaxed(host->ioaddr + msm_bayhub_offset->core_dll_status) &
+		 CORE_DLL_LOCK)) {
+		/* max. wait for 50us sec for LOCK bit to be set */
+		if (--wait_cnt == 0) {
+			dev_err(mmc_dev(mmc), "%s: DLL failed to LOCK\n",
+			       mmc_hostname(mmc));
+			spin_unlock_irqrestore(&host->lock, flags);
+			return -ETIMEDOUT;
+		}
+		udelay(1);
+	}
+
+	spin_unlock_irqrestore(&host->lock, flags);
+	return 0;
+}
+
+static void msm_bayhub_hc_select_default(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	u32 config;
+	const struct sdhci_msm_bayhub_offset *msm_bayhub_offset =
+					msm_bayhub_host->offset;
+
+	if (!msm_bayhub_host->use_cdclp533) {
+		config = readl_relaxed(host->ioaddr +
+				msm_bayhub_offset->core_vendor_spec3);
+		config &= ~CORE_PWRSAVE_DLL;
+		writel_relaxed(config, host->ioaddr +
+				msm_bayhub_offset->core_vendor_spec3);
+	}
+
+	config = readl_relaxed(host->ioaddr + msm_bayhub_offset->core_vendor_spec);
+	config &= ~CORE_HC_MCLK_SEL_MASK;
+	config |= CORE_HC_MCLK_SEL_DFLT;
+	writel_relaxed(config, host->ioaddr + msm_bayhub_offset->core_vendor_spec);
+
+	/*
+	 * Disable HC_SELECT_IN to be able to use the UHS mode select
+	 * configuration from Host Control2 register for all other
+	 * modes.
+	 * Write 0 to HC_SELECT_IN and HC_SELECT_IN_EN field
+	 * in VENDOR_SPEC_FUNC
+	 */
+	config = readl_relaxed(host->ioaddr + msm_bayhub_offset->core_vendor_spec);
+	config &= ~CORE_HC_SELECT_IN_EN;
+	config &= ~CORE_HC_SELECT_IN_MASK;
+	writel_relaxed(config, host->ioaddr + msm_bayhub_offset->core_vendor_spec);
+
+	/*
+	 * Make sure above writes impacting free running MCLK are completed
+	 * before changing the clk_rate at GCC.
+	 */
+	wmb();
+}
+
+static void msm_bayhub_hc_select_hs400(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	struct mmc_ios ios = host->mmc->ios;
+	u32 config, dll_lock;
+	int rc;
+	const struct sdhci_msm_bayhub_offset *msm_bayhub_offset =
+					msm_bayhub_host->offset;
+
+	/* Select the divided clock (free running MCLK/2) */
+	config = readl_relaxed(host->ioaddr + msm_bayhub_offset->core_vendor_spec);
+	config &= ~CORE_HC_MCLK_SEL_MASK;
+	config |= CORE_HC_MCLK_SEL_HS400;
+
+	writel_relaxed(config, host->ioaddr + msm_bayhub_offset->core_vendor_spec);
+	/*
+	 * Select HS400 mode using the HC_SELECT_IN from VENDOR SPEC
+	 * register
+	 */
+	if ((msm_bayhub_host->tuning_done || ios.enhanced_strobe) &&
+	    !msm_bayhub_host->calibration_done) {
+		config = readl_relaxed(host->ioaddr +
+				msm_bayhub_offset->core_vendor_spec);
+		config |= CORE_HC_SELECT_IN_HS400;
+		config |= CORE_HC_SELECT_IN_EN;
+		writel_relaxed(config, host->ioaddr +
+				msm_bayhub_offset->core_vendor_spec);
+	}
+	if (!msm_bayhub_host->clk_rate && !msm_bayhub_host->use_cdclp533) {
+		/*
+		 * Poll on DLL_LOCK or DDR_DLL_LOCK bits in
+		 * core_dll_status to be set. This should get set
+		 * within 15 us at 200 MHz.
+		 */
+		rc = readl_relaxed_poll_timeout(host->ioaddr +
+						msm_bayhub_offset->core_dll_status,
+						dll_lock,
+						(dll_lock &
+						(CORE_DLL_LOCK |
+						CORE_DDR_DLL_LOCK)), 10,
+						1000);
+		if (rc == -ETIMEDOUT)
+			pr_err("%s: Unable to get DLL_LOCK/DDR_DLL_LOCK, dll_status: 0x%08x\n",
+			       mmc_hostname(host->mmc), dll_lock);
+	}
+	/*
+	 * Make sure above writes impacting free running MCLK are completed
+	 * before changing the clk_rate at GCC.
+	 */
+	wmb();
+}
+
+/*
+ * sdhci_msm_bayhub_hc_select_mode :- In general all timing modes are
+ * controlled via UHS mode select in Host Control2 register.
+ * eMMC specific HS200/HS400 doesn't have their respective modes
+ * defined here, hence we use these values.
+ *
+ * HS200 - SDR104 (Since they both are equivalent in functionality)
+ * HS400 - This involves multiple configurations
+ *		Initially SDR104 - when tuning is required as HS200
+ *		Then when switching to DDR @ 400MHz (HS400) we use
+ *		the vendor specific HC_SELECT_IN to control the mode.
+ *
+ * In addition to controlling the modes we also need to select the
+ * correct input clock for DLL depending on the mode.
+ *
+ * HS400 - divided clock (free running MCLK/2)
+ * All other modes - default (free running MCLK)
+ */
+static void sdhci_msm_bayhub_hc_select_mode(struct sdhci_host *host)
+{
+	struct mmc_ios ios = host->mmc->ios;
+
+	if (ios.timing == MMC_TIMING_MMC_HS400 ||
+	    host->flags & SDHCI_HS400_TUNING)
+		msm_bayhub_hc_select_hs400(host);
+	else
+		msm_bayhub_hc_select_default(host);
+}
+
+static int sdhci_msm_bayhub_cdclp533_calibration(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	u32 config, calib_done;
+	int ret;
+	const struct sdhci_msm_bayhub_offset *msm_bayhub_offset =
+					msm_bayhub_host->offset;
+
+	pr_debug("%s: %s: Enter\n", mmc_hostname(host->mmc), __func__);
+
+	/*
+	 * Retuning in HS400 (DDR mode) will fail, just reset the
+	 * tuning block and restore the saved tuning phase.
+	 */
+	ret = msm_bayhub_init_cm_dll(host);
+	if (ret)
+		goto out;
+
+	/* Set the selected phase in delay line hw block */
+	ret = msm_bayhub_config_cm_dll_phase(host, msm_bayhub_host->saved_tuning_phase);
+	if (ret)
+		goto out;
+
+	config = readl_relaxed(host->ioaddr + msm_bayhub_offset->core_dll_config);
+	config |= CORE_CMD_DAT_TRACK_SEL;
+	writel_relaxed(config, host->ioaddr + msm_bayhub_offset->core_dll_config);
+
+	config = readl_relaxed(host->ioaddr + msm_bayhub_offset->core_ddr_200_cfg);
+	config &= ~CORE_CDC_T4_DLY_SEL;
+	writel_relaxed(config, host->ioaddr + msm_bayhub_offset->core_ddr_200_cfg);
+
+	config = readl_relaxed(host->ioaddr + CORE_CSR_CDC_GEN_CFG);
+	config &= ~CORE_CDC_SWITCH_BYPASS_OFF;
+	writel_relaxed(config, host->ioaddr + CORE_CSR_CDC_GEN_CFG);
+
+	config = readl_relaxed(host->ioaddr + CORE_CSR_CDC_GEN_CFG);
+	config |= CORE_CDC_SWITCH_RC_EN;
+	writel_relaxed(config, host->ioaddr + CORE_CSR_CDC_GEN_CFG);
+
+	config = readl_relaxed(host->ioaddr + msm_bayhub_offset->core_ddr_200_cfg);
+	config &= ~CORE_START_CDC_TRAFFIC;
+	writel_relaxed(config, host->ioaddr + msm_bayhub_offset->core_ddr_200_cfg);
+
+	/* Perform CDC Register Initialization Sequence */
+
+	writel_relaxed(0x11800EC, host->ioaddr + CORE_CSR_CDC_CTLR_CFG0);
+	writel_relaxed(0x3011111, host->ioaddr + CORE_CSR_CDC_CTLR_CFG1);
+	writel_relaxed(0x1201000, host->ioaddr + CORE_CSR_CDC_CAL_TIMER_CFG0);
+	writel_relaxed(0x4, host->ioaddr + CORE_CSR_CDC_CAL_TIMER_CFG1);
+	writel_relaxed(0xCB732020, host->ioaddr + CORE_CSR_CDC_REFCOUNT_CFG);
+	writel_relaxed(0xB19, host->ioaddr + CORE_CSR_CDC_COARSE_CAL_CFG);
+	writel_relaxed(0x4E2, host->ioaddr + CORE_CSR_CDC_DELAY_CFG);
+	writel_relaxed(0x0, host->ioaddr + CORE_CDC_OFFSET_CFG);
+	writel_relaxed(0x16334, host->ioaddr + CORE_CDC_SLAVE_DDA_CFG);
+
+	/* CDC HW Calibration */
+
+	config = readl_relaxed(host->ioaddr + CORE_CSR_CDC_CTLR_CFG0);
+	config |= CORE_SW_TRIG_FULL_CALIB;
+	writel_relaxed(config, host->ioaddr + CORE_CSR_CDC_CTLR_CFG0);
+
+	config = readl_relaxed(host->ioaddr + CORE_CSR_CDC_CTLR_CFG0);
+	config &= ~CORE_SW_TRIG_FULL_CALIB;
+	writel_relaxed(config, host->ioaddr + CORE_CSR_CDC_CTLR_CFG0);
+
+	config = readl_relaxed(host->ioaddr + CORE_CSR_CDC_CTLR_CFG0);
+	config |= CORE_HW_AUTOCAL_ENA;
+	writel_relaxed(config, host->ioaddr + CORE_CSR_CDC_CTLR_CFG0);
+
+	config = readl_relaxed(host->ioaddr + CORE_CSR_CDC_CAL_TIMER_CFG0);
+	config |= CORE_TIMER_ENA;
+	writel_relaxed(config, host->ioaddr + CORE_CSR_CDC_CAL_TIMER_CFG0);
+
+	ret = readl_relaxed_poll_timeout(host->ioaddr + CORE_CSR_CDC_STATUS0,
+					 calib_done,
+					 (calib_done & CORE_CALIBRATION_DONE),
+					 1, 50);
+
+	if (ret == -ETIMEDOUT) {
+		pr_err("%s: %s: CDC calibration was not completed\n",
+		       mmc_hostname(host->mmc), __func__);
+		goto out;
+	}
+
+	ret = readl_relaxed(host->ioaddr + CORE_CSR_CDC_STATUS0)
+			& CORE_CDC_ERROR_CODE_MASK;
+	if (ret) {
+		pr_err("%s: %s: CDC error code %d\n",
+		       mmc_hostname(host->mmc), __func__, ret);
+		ret = -EINVAL;
+		goto out;
+	}
+
+	config = readl_relaxed(host->ioaddr + msm_bayhub_offset->core_ddr_200_cfg);
+	config |= CORE_START_CDC_TRAFFIC;
+	writel_relaxed(config, host->ioaddr + msm_bayhub_offset->core_ddr_200_cfg);
+out:
+	pr_debug("%s: %s: Exit, ret %d\n", mmc_hostname(host->mmc),
+		 __func__, ret);
+	return ret;
+}
+
+static int sdhci_msm_bayhub_cm_dll_sdc4_calibration(struct sdhci_host *host)
+{
+	struct mmc_host *mmc = host->mmc;
+	u32 dll_status, config, ddr_cfg_offset;
+	int ret;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	const struct sdhci_msm_bayhub_offset *msm_bayhub_offset =
+					sdhci_priv_msm_bayhub_offset(host);
+
+	pr_debug("%s: %s: Enter\n", mmc_hostname(host->mmc), __func__);
+
+	/*
+	 * Currently the core_ddr_config register defaults to desired
+	 * configuration on reset. Currently reprogramming the power on
+	 * reset (POR) value in case it might have been modified by
+	 * bootloaders. In the future, if this changes, then the desired
+	 * values will need to be programmed appropriately.
+	 */
+	if (msm_bayhub_host->updated_ddr_cfg)
+		ddr_cfg_offset = msm_bayhub_offset->core_ddr_config;
+	else
+		ddr_cfg_offset = msm_bayhub_offset->core_ddr_config_old;
+	writel_relaxed(msm_bayhub_host->ddr_config, host->ioaddr + ddr_cfg_offset);
+
+	if (mmc->ios.enhanced_strobe) {
+		config = readl_relaxed(host->ioaddr +
+				msm_bayhub_offset->core_ddr_200_cfg);
+		config |= CORE_CMDIN_RCLK_EN;
+		writel_relaxed(config, host->ioaddr +
+				msm_bayhub_offset->core_ddr_200_cfg);
+	}
+
+	config = readl_relaxed(host->ioaddr + msm_bayhub_offset->core_dll_config_2);
+	config |= CORE_DDR_CAL_EN;
+	writel_relaxed(config, host->ioaddr + msm_bayhub_offset->core_dll_config_2);
+
+	ret = readl_relaxed_poll_timeout(host->ioaddr +
+					msm_bayhub_offset->core_dll_status,
+					dll_status,
+					(dll_status & CORE_DDR_DLL_LOCK),
+					10, 1000);
+
+	if (ret == -ETIMEDOUT) {
+		pr_err("%s: %s: CM_DLL_SDC4 calibration was not completed\n",
+		       mmc_hostname(host->mmc), __func__);
+		goto out;
+	}
+
+	/*
+	 * Set CORE_PWRSAVE_DLL bit in CORE_VENDOR_SPEC3.
+	 * When MCLK is gated OFF, it is not gated for less than 0.5us
+	 * and MCLK must be switched on for at-least 1us before DATA
+	 * starts coming. Controllers with 14lpp and later tech DLL cannot
+	 * guarantee above requirement. So PWRSAVE_DLL should not be
+	 * turned on for host controllers using this DLL.
+	 */
+	if (!msm_bayhub_host->use_14lpp_dll_reset) {
+		config = readl_relaxed(host->ioaddr +
+				msm_bayhub_offset->core_vendor_spec3);
+		config |= CORE_PWRSAVE_DLL;
+		writel_relaxed(config, host->ioaddr +
+				msm_bayhub_offset->core_vendor_spec3);
+	}
+
+	/*
+	 * Drain writebuffer to ensure above DLL calibration
+	 * and PWRSAVE DLL is enabled.
+	 */
+	wmb();
+out:
+	pr_debug("%s: %s: Exit, ret %d\n", mmc_hostname(host->mmc),
+		 __func__, ret);
+	return ret;
+}
+
+static int sdhci_msm_bayhub_hs400_dll_calibration(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	struct mmc_host *mmc = host->mmc;
+	int ret;
+	u32 config;
+	const struct sdhci_msm_bayhub_offset *msm_bayhub_offset =
+					msm_bayhub_host->offset;
+
+	pr_debug("%s: %s: Enter\n", mmc_hostname(host->mmc), __func__);
+
+	/*
+	 * Retuning in HS400 (DDR mode) will fail, just reset the
+	 * tuning block and restore the saved tuning phase.
+	 */
+	ret = msm_bayhub_init_cm_dll(host);
+	if (ret)
+		goto out;
+
+	if (!mmc->ios.enhanced_strobe) {
+		/* Set the selected phase in delay line hw block */
+		ret = msm_bayhub_config_cm_dll_phase(host,
+					      msm_bayhub_host->saved_tuning_phase);
+		if (ret)
+			goto out;
+		config = readl_relaxed(host->ioaddr +
+				msm_bayhub_offset->core_dll_config);
+		config |= CORE_CMD_DAT_TRACK_SEL;
+		writel_relaxed(config, host->ioaddr +
+				msm_bayhub_offset->core_dll_config);
+	}
+
+	if (msm_bayhub_host->use_cdclp533)
+		ret = sdhci_msm_bayhub_cdclp533_calibration(host);
+	else
+		ret = sdhci_msm_bayhub_cm_dll_sdc4_calibration(host);
+out:
+	pr_debug("%s: %s: Exit, ret %d\n", mmc_hostname(host->mmc),
+		 __func__, ret);
+	return ret;
+}
+
+static bool sdhci_msm_bayhub_is_tuning_needed(struct sdhci_host *host)
+{
+	struct mmc_ios *ios = &host->mmc->ios;
+
+	/*
+	 * Tuning is required for SDR104, HS200 and HS400 cards and
+	 * if clock frequency is greater than 100MHz in these modes.
+	 */
+	if (host->clock <= CORE_FREQ_100MHZ ||
+	    !(ios->timing == MMC_TIMING_MMC_HS400 ||
+	    ios->timing == MMC_TIMING_MMC_HS200 ||
+	    ios->timing == MMC_TIMING_UHS_SDR104) ||
+	    ios->enhanced_strobe)
+		return false;
+
+	return true;
+}
+
+static int sdhci_msm_bayhub_restore_sdr_dll_config(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	int ret;
+
+	/*
+	 * SDR DLL comes into picture only for timing modes which needs
+	 * tuning.
+	 */
+	if (!sdhci_msm_bayhub_is_tuning_needed(host))
+		return 0;
+
+	/* Reset the tuning block */
+	ret = msm_bayhub_init_cm_dll(host);
+	if (ret)
+		return ret;
+
+	/* Restore the tuning block */
+	ret = msm_bayhub_config_cm_dll_phase(host, msm_bayhub_host->saved_tuning_phase);
+
+	return ret;
+}
+
+static void sdhci_msm_bayhub_set_cdr(struct sdhci_host *host, bool enable)
+{
+	const struct sdhci_msm_bayhub_offset *msm_bayhub_offset =
+							sdhci_priv_msm_bayhub_offset(host);
+	u32 config, oldconfig = readl_relaxed(host->ioaddr +
+					      msm_bayhub_offset->core_dll_config);
+
+	config = oldconfig;
+	if (enable) {
+		config |= CORE_CDR_EN;
+		config &= ~CORE_CDR_EXT_EN;
+	} else {
+		config &= ~CORE_CDR_EN;
+		config |= CORE_CDR_EXT_EN;
+	}
+
+	if (config != oldconfig) {
+		writel_relaxed(config, host->ioaddr +
+			       msm_bayhub_offset->core_dll_config);
+	}
+}
+
+static int sdhci_msm_bayhub_execute_tuning(struct mmc_host *mmc, u32 opcode)
+{
+	struct sdhci_host *host = mmc_priv(mmc);
+	int tuning_seq_cnt = 10;
+	u8 phase, tuned_phases[16], tuned_phase_cnt = 0;
+	int rc;
+	struct mmc_ios ios = host->mmc->ios;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+
+	if (!sdhci_msm_bayhub_is_tuning_needed(host)) {
+		msm_bayhub_host->use_cdr = false;
+		sdhci_msm_bayhub_set_cdr(host, false);
+		return 0;
+	}
+
+	/* Clock-Data-Recovery used to dynamically adjust RX sampling point */
+	msm_bayhub_host->use_cdr = true;
+
+	/*
+	 * Clear tuning_done flag before tuning to ensure proper
+	 * HS400 settings.
+	 */
+	msm_bayhub_host->tuning_done = 0;
+
+	/*
+	 * For HS400 tuning in HS200 timing requires:
+	 * - select MCLK/2 in VENDOR_SPEC
+	 * - program MCLK to 400MHz (or nearest supported) in GCC
+	 */
+	if (host->flags & SDHCI_HS400_TUNING) {
+		sdhci_msm_bayhub_hc_select_mode(host);
+		msm_bayhub_set_clock_rate_for_bus_mode(host, ios.clock);
+		host->flags &= ~SDHCI_HS400_TUNING;
+	}
+
+retry:
+	/* First of all reset the tuning block */
+	rc = msm_bayhub_init_cm_dll(host);
+	if (rc)
+		return rc;
+
+	phase = 0;
+	do {
+		/* Set the phase in delay line hw block */
+		rc = msm_bayhub_config_cm_dll_phase(host, phase);
+		if (rc)
+			return rc;
+
+		rc = mmc_send_tuning(mmc, opcode, NULL);
+		if (!rc) {
+			/* Tuning is successful at this tuning point */
+			tuned_phases[tuned_phase_cnt++] = phase;
+			dev_dbg(mmc_dev(mmc), "%s: Found good phase = %d\n",
+				 mmc_hostname(mmc), phase);
+		}
+
+		if (msm_bayhub_host->ggc.bh201_used)
+			usleep_range(1000, 1200);
+
+	} while (++phase < ARRAY_SIZE(tuned_phases));
+
+	if (tuned_phase_cnt) {
+		if (tuned_phase_cnt == ARRAY_SIZE(tuned_phases)) {
+			/*
+			 * All phases valid is _almost_ as bad as no phases
+			 * valid.  Probably all phases are not really reliable
+			 * but we didn't detect where the unreliable place is.
+			 * That means we'll essentially be guessing and hoping
+			 * we get a good phase.  Better to try a few times.
+			 */
+			dev_dbg(mmc_dev(mmc), "%s: All phases valid; try again\n",
+				mmc_hostname(mmc));
+			if (--tuning_seq_cnt) {
+				tuned_phase_cnt = 0;
+				goto retry;
+			}
+		}
+
+		rc = msm_bayhub_find_most_appropriate_phase(host, tuned_phases,
+						     tuned_phase_cnt);
+		if (rc >= 0)
+			phase = rc;
+		else
+			return rc;
+
+		/*
+		 * Finally set the selected phase in delay
+		 * line hw block.
+		 */
+		rc = msm_bayhub_config_cm_dll_phase(host, phase);
+		if (rc)
+			return rc;
+		msm_bayhub_host->saved_tuning_phase = phase;
+		dev_dbg(mmc_dev(mmc), "%s: Setting the tuning phase to %d\n",
+			 mmc_hostname(mmc), phase);
+	} else {
+		if (--tuning_seq_cnt)
+			goto retry;
+		/* Tuning failed */
+		dev_dbg(mmc_dev(mmc), "%s: No tuning point found\n",
+		       mmc_hostname(mmc));
+		rc = -EIO;
+	}
+
+	if (!rc)
+		msm_bayhub_host->tuning_done = true;
+	return rc;
+}
+
+static const unsigned int freqs[] = { 400000, 300000, 200000, 100000 };
+
+static void cfg_bit_2_bt(int max_bit, int tar, int *byt, int *bit)
+{
+	struct rl_bit_lct cfg_bit_map[6] = {
+		{0, 6},	{1, 5},	{2, 4},
+		{3, 2},	{4, 1},	{5, 0},
+	};
+
+	*byt = (max_bit - tar) / 6;
+	*bit = cfg_bit_map[(max_bit - tar) % 6].rl_bits;
+}
+
+static u32 cfg_read_bits_ofs_mask(u8 *cfg, struct t_gg_reg_strt *bts)
+{
+	u32 rv = 0;
+	u32 msk = bts->mask;
+	int byt = 0, bit = 0;
+	int i = 0;
+
+	do {
+		cfg_bit_2_bt(MAX_CFG_BIT_VAL, bts->ofs + i, &byt, &bit);
+		if (cfg[byt] & (1 << bit))
+			rv |= 1 << i;
+
+		i++;
+		msk >>= 1;
+		if (msk == 0)
+			break;
+	} while (1);
+	return rv;
+}
+
+static void get_default_setting(struct sdhci_host *host, u8 *data)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+
+	vendor_host->ggc.def_sela_100m =
+		cfg_read_bits_ofs_mask(data, &vendor_host->ggc.dll_sela_100m_cfg);
+	vendor_host->ggc.def_sela_200m =
+		cfg_read_bits_ofs_mask(data, &vendor_host->ggc.dll_sela_200m_cfg);
+	vendor_host->ggc.def_selb_100m =
+		cfg_read_bits_ofs_mask(data, &vendor_host->ggc.dll_sela_100m_cfg);
+	vendor_host->ggc.def_selb_200m =
+		cfg_read_bits_ofs_mask(data, &vendor_host->ggc.dll_sela_200m_cfg);
+}
+
+static void cfg_write_bits_ofs_mask(u8 *cfg,
+		struct t_gg_reg_strt *bts, u32 w_value)
+{
+	u32 wv = w_value & bts->mask;
+	u32 msk = bts->mask;
+	int byt = 0, bit = 0;
+	int i = 0;
+
+	do {
+		cfg_bit_2_bt(MAX_CFG_BIT_VAL, bts->ofs + i, &byt, &bit);
+		if (wv & 1)
+			cfg[byt] |= (u8) (1 << bit);
+		else
+			cfg[byt] &= (u8) (~(1 << bit));
+
+		i++;
+		wv >>= 1;
+		msk >>= 1;
+		if (msk == 0)
+			break;
+	} while (1);
+}
+
+static void ram_bit_2_bt(int tar, int *byt, int *bit)
+{
+	*byt = tar / 8;
+	*bit = tar % 8;
+}
+
+static void set_gg_reg_cur_val(struct ggc_platform_t  *ggc,
+	u8 *data, u8 len)
+{
+	memcpy(&ggc->_gg_reg_cur[0], data, len);
+}
+
+static void get_gg_reg_cur_val(struct ggc_platform_t  *ggc,
+	u8 *data, u8 len)
+{
+	memcpy(data, &ggc->_gg_reg_cur[0], len);
+}
+
+static void get_gg_reg_def(struct sdhci_host *host, u8 *data)
+{
+	u32 gg_sw_def[16] = GGC_CFG_DATA;
+
+	memcpy(data, (u8 *)&(gg_sw_def[0]), sizeof(gg_sw_def));
+}
+
+static u32 read_ram_bits_ofs_mask(u8 *cfg, struct t_gg_reg_strt *bts)
+{
+	u32 rv = 0;
+	u32 msk = bts->mask;
+	int byt = 0, bit = 0;
+	int i = 0;
+
+	do {
+		ram_bit_2_bt(bts->ofs + i, &byt, &bit);
+		if (cfg[byt] & (1 << bit))
+			rv |= 1 << i;
+
+		i++;
+		msk >>= 1;
+		if (msk == 0)
+			break;
+
+	} while (1);
+	return rv;
+}
+
+static void ggc_dll_voltage_init(struct sdhci_host *host)
+{
+	int i = 0;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host =
+						sdhci_pltfm_priv(pltfm_host);
+
+	for (i = 0; i < 4; i++) {
+		vendor_host->ggc.dll_voltage_scan_map[i] = 0;
+		vendor_host->ggc.sdr50.dll_voltage_unlock_cnt[i] = 0;
+		vendor_host->ggc.sdr104.dll_voltage_unlock_cnt[i] = 0;
+	}
+}
+
+static void ggc_chip_init(struct sdhci_host *host)
+{
+	u8 data[512] = { 0 };
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host =
+						sdhci_pltfm_priv(pltfm_host);
+
+	get_gg_reg_def(host, data);
+	get_default_setting(host, data);
+	set_gg_reg_cur_val(&vendor_host->ggc, data, 64);
+}
+
+static int driver_send_command7(struct sdhci_host *host)
+{
+	int ret = 0;
+	int err;
+	struct mmc_host *mmc = host->mmc;
+	struct mmc_command cmd = {0};
+
+	cmd.opcode = MMC_SELECT_CARD;
+	cmd.arg = 0;
+	cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
+	err = mmc_wait_for_cmd(mmc, &cmd, 3);
+	if (err)
+		ret = 0;
+	else
+		ret = 1;
+
+	return ret;
+}
+
+static void driver_send_command24(struct sdhci_host *host,
+		u32 *cfg_data, int data_len)
+{
+	struct mmc_host *mmc = host->mmc;
+	struct mmc_request mrq = {0};
+	struct mmc_command cmd = { 0 };
+	struct mmc_data data = { 0 };
+	struct scatterlist sg;
+	u8 *data1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
+
+	memcpy(data1, (u8 *)&(cfg_data[0]), data_len);
+	sg_init_one(&sg, data1, 512);
+
+	cmd.opcode = MMC_WRITE_BLOCK;
+	cmd.arg = 0;
+	cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+	data.blksz = 512;
+	data.blocks = 1;
+	data.flags = MMC_DATA_WRITE;
+	data.timeout_ns = 1000 * 1000 * 1000;
+	data.sg = &sg;
+	data.sg_len = 1;
+	mrq.cmd = &cmd;
+	mrq.data = &data;
+	mrq.stop = NULL;
+
+	mmc_wait_for_req(mmc, &mrq);
+	kfree(data1);
+}
+
+static void bht_update_cfg(struct mmc_host *mmc_host,
+	struct mmc_card *card, u32 *cfg_data, int data_len)
+{
+	int ret = 0;
+	struct sdhci_host *host;
+
+	host = mmc_priv(mmc_host);
+	mmc_set_bus_width(mmc_host, MMC_BUS_WIDTH_4);
+	if (host->ops->reset)
+		host->ops->reset(host, SDHCI_RESET_CMD|SDHCI_RESET_DATA);
+
+	driver_send_command7(host);
+	driver_send_command24(host, cfg_data, data_len);
+	driver_send_command7(host);
+
+	mmc_set_bus_width(mmc_host, MMC_BUS_WIDTH_1);
+}
+
+
+static void tx_selb_failed_tb_reset(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host =
+						sdhci_pltfm_priv(pltfm_host);
+
+	memset(&vendor_host->ggc.sdr104.tx_selb_tb, 0xff,
+			sizeof(vendor_host->ggc.sdr104.tx_selb_tb));
+	memset(&vendor_host->ggc.sdr50.tx_selb_tb, 0xff,
+			sizeof(vendor_host->ggc.sdr50.tx_selb_tb));
+}
+
+static void all_selb_failed_tb_reset(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host =
+						sdhci_pltfm_priv(pltfm_host);
+
+	memset(vendor_host->ggc.sdr104.all_selb_tb, 0xff,
+			sizeof(vendor_host->ggc.sdr104.all_selb_tb));
+	memset(vendor_host->ggc.sdr50.all_selb_tb, 0xff,
+			sizeof(vendor_host->ggc.sdr50.all_selb_tb));
+}
+
+static void tx_selb_failed_history_reset(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host =
+						sdhci_pltfm_priv(pltfm_host);
+
+	vendor_host->ggc.sdr50.tx_selb_failed_history = BIT_PASS_MASK;
+	vendor_host->ggc.sdr104.tx_selb_failed_history = BIT_PASS_MASK;
+}
+
+static void ggc_reset_selx_failed_tb(struct sdhci_host *host)
+{
+	tx_selb_failed_tb_reset(host);
+	all_selb_failed_tb_reset(host);
+	tx_selb_failed_history_reset(host);
+}
+
+static void _ggc_reset_sela_tuning_result(
+			struct sdhci_msm_bayhub_host *host)
+{
+	int i = 0;
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++)
+		host->ggc.ggc_sela_tuning_result[i] = NO_TUNING;
+}
+
+static void _ggc_reset_tuning_result_for_dll(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host =
+						sdhci_pltfm_priv(pltfm_host);
+
+	ggc_reset_selx_failed_tb(host);
+	vendor_host->ggc.ggc_cmd_tx_selb_failed_range = BIT_PASS_MASK;
+	vendor_host->ggc.selx_tuning_done_flag = 0;
+	_ggc_reset_sela_tuning_result(vendor_host);
+}
+
+static void ggc_tuning_result_reset(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host =
+						sdhci_pltfm_priv(pltfm_host);
+
+	_ggc_reset_tuning_result_for_dll(host);
+
+	vendor_host->ggc.sdr50.bus_mode = SD_FNC_AM_SDR50;
+	vendor_host->ggc.sdr104.bus_mode = SD_FNC_AM_SDR104;
+	vendor_host->ggc.driver_strength_reinit_flg = 0;
+	vendor_host->ggc.cur_bus_mode = NULL;
+	vendor_host->ggc.dll_unlock_reinit_flg = 0;
+	vendor_host->ggc.tuning_cmd7_timeout_reinit_flg = 0;
+	vendor_host->ggc.tuning_cmd7_timeout_reinit_cnt = 0;
+	vendor_host->ggc.sdr50_notuning_sela_inject_flag = 1;
+	vendor_host->ggc.sdr50_notuning_crc_error_flag = 0;
+	if (vendor_host->ggc.bh201_sdr50_sela_sw_inject)
+		vendor_host->ggc.sdr50_notuning_sela_rx_inject =
+						vendor_host->ggc.bh201_sdr50_sela_sw_inject;
+	else
+		vendor_host->ggc.sdr50_notuning_sela_rx_inject = 0x47F;
+}
+
+static void bht_load_hw_inject(struct mmc_host *mmc_host,
+	struct mmc_card *card, u32 *cfg_data, int data_len,
+	u32 sel200, u32 sel100)
+{
+	struct sdhci_host *host = mmc_priv(mmc_host);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host =
+						sdhci_pltfm_priv(pltfm_host);
+	u32 gg_hw_inj[16] = GGC_CFG_DATA;
+
+	gg_hw_inj[1] = 0x7364032;
+
+	if (vendor_host->ggc.bh201_sdr104_selb_hw_inject)
+		gg_hw_inj[11] = vendor_host->ggc.bh201_sdr104_selb_hw_inject;
+	else
+		gg_hw_inj[11] = 0x57336200;
+
+	if (vendor_host->ggc.bh201_sdr50_selb_hw_inject)
+		gg_hw_inj[12] = vendor_host->ggc.bh201_sdr50_selb_hw_inject;
+	else
+		gg_hw_inj[12] = 0x00725777;
+
+	if (vendor_host->ggc.bh201_drive_strength)
+		gg_hw_inj[15] = vendor_host->ggc.bh201_drive_strength;
+
+	bht_update_cfg(mmc_host, card, gg_hw_inj, data_len);
+}
+
+static void bht_load(struct mmc_host *mmc_host, struct mmc_card *card)
+{
+	struct sdhci_host *host = mmc_priv(mmc_host);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host =
+						sdhci_pltfm_priv(pltfm_host);
+	u8 driver_strength_reinit_flg =
+				vendor_host->ggc.driver_strength_reinit_flg;
+	int cur_dll_voltage_idx = vendor_host->ggc.cur_dll_voltage_idx;
+	u32 i = 0;
+	u32 reg;
+	u32 gg_sw_def[16] = GGC_CFG_DATA;
+	u8 data[512];
+	static const int s_dll_voltage_cfg[4][2] = {
+		{0x30503106, 0x64141711},
+		{0x31503106, 0x64141711},
+		{0x30503106, 0x64141751},
+		{0x31503106, 0x64141751},
+	};
+
+	if (vendor_host->ggc.bh201_used) {
+		pr_debug("%s: Load BHT patch\n", mmc_hostname(mmc_host));
+
+		mmc_send_relative_addr(mmc_host, &card->rca);
+		mmc_host->card = card;
+		if (vendor_host->ggc.dll_unlock_reinit_flg) {
+			pr_debug("dll unlock reinit: idx=%d\n",
+					cur_dll_voltage_idx);
+			ggc_tuning_result_reset(host);
+			gg_sw_def[8] = s_dll_voltage_cfg[cur_dll_voltage_idx][0];
+			gg_sw_def[9] = s_dll_voltage_cfg[cur_dll_voltage_idx][1];
+		}
+		if (vendor_host->ggc.driver_strength_reinit_flg) {
+			pr_debug("%s: driver strength should be init to %d\n",
+				mmc_hostname(mmc_host), driver_strength_reinit_flg);
+			ggc_tuning_result_reset(host);
+			if (vendor_host->ggc.driver_strength_reinit_flg <= 7) {
+				gg_sw_def[15] &= 0x0f0fffff;
+				gg_sw_def[15] |= (driver_strength_reinit_flg << 28)
+						| (driver_strength_reinit_flg << 20);
+			}
+		}
+		driver_send_command7(host);
+		if (vendor_host->ggc.tuning_cmd7_timeout_reinit_flg == 0
+					&& vendor_host->ggc.selx_tuning_done_flag == 0) {
+			bht_load_hw_inject(mmc_host, card, gg_sw_def,
+				sizeof(gg_sw_def), 0x3ff, 0x77f);
+			bht_update_cfg(mmc_host, card, gg_sw_def, sizeof(gg_sw_def));
+			set_gg_reg_cur_val(&vendor_host->ggc, (u8 *)gg_sw_def, sizeof(gg_sw_def));
+		} else {
+			if (vendor_host->ggc.selx_tuning_done_flag)
+				pr_debug("%s: skip load default configuration for tuning done\n",
+					mmc_hostname(mmc_host));
+			if (vendor_host->ggc.tuning_cmd7_timeout_reinit_flg) {
+				pr_debug("%s: write previous inject results to bh201 for cmd7 timeout flag is set\n",
+					mmc_hostname(mmc_host));
+				get_gg_reg_cur_val(&vendor_host->ggc, data, sizeof(gg_sw_def));
+
+				pr_debug("%s: dump config data before write to bh201\n", __func__);
+				for (i = 0; i < 128; i++) {
+					memcpy(&reg, data+i*sizeof(u32), sizeof(u32));
+					pr_debug("ggc_reg32[%03d]=0x%08x\n", i, reg);
+				}
+				bht_update_cfg(mmc_host, card, (u32 *)data, sizeof(data));
+			}
+		}
+	}
+}
+
+static void bh201_signal_voltage_on_off(struct sdhci_host *host, u32 on_off)
+{
+	int card_present_status = 0;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+
+	if (vendor_host->ggc.bh201_used) {
+		if (gpio_is_valid(vendor_host->ggc.det_gpio)) {
+			card_present_status = gpio_get_value(vendor_host->ggc.det_gpio);
+			pr_debug("%s: detect_gpio pin %d status is %d\n",
+			mmc_hostname(host->mmc), vendor_host->ggc.det_gpio, card_present_status);
+		} else {
+			pr_err("%s: no det_gpio provided\n", mmc_hostname(host->mmc));
+		}
+
+		if (on_off) {
+			pr_debug("%s: apply bht power on patch\n", mmc_hostname(host->mmc));
+
+			ggc_dll_voltage_init(host);
+
+			ggc_chip_init(host);
+
+			if (gpio_is_valid(vendor_host->ggc.pwr_gpio)) {
+				gpio_direction_output(vendor_host->ggc.pwr_gpio, 1);
+				msleep(100);
+				pr_debug("%s: pwr_gpio pin %d status is %d\n",
+					mmc_hostname(host->mmc), vendor_host->ggc.pwr_gpio,
+					gpio_get_value(vendor_host->ggc.pwr_gpio));
+			} else {
+				pr_err("%s: no pwr_gpio provided\n", mmc_hostname(host->mmc));
+			}
+		} else {
+			pr_debug("%s: apply bht power off patch\n", mmc_hostname(host->mmc));
+
+			ggc_dll_voltage_init(host);
+
+			if (card_present_status <= 0) {
+				pr_debug("%s: clear tuning result for power off and card removed\n",
+					mmc_hostname(host->mmc));
+				ggc_tuning_result_reset(host);
+			}
+			ggc_chip_init(host);
+
+			if (gpio_is_valid(vendor_host->ggc.pwr_gpio)) {
+				gpio_direction_output(vendor_host->ggc.pwr_gpio, 0);
+				pr_debug("%s: pwr_gpio pin %d status is %d\n",
+				mmc_hostname(host->mmc), vendor_host->ggc.pwr_gpio,
+				gpio_get_value(vendor_host->ggc.pwr_gpio));
+			} else {
+				pr_err("%s: no pwr_gpio provided\n", mmc_hostname(host->mmc));
+			}
+		}
+	}
+}
+
+static void sdhci_bh201_parse(struct mmc_host *mmc_host)
+{
+	struct sdhci_host *host = mmc_priv(mmc_host);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct device_node *np = vendor_host->pdev->dev.of_node;
+	struct t_gg_reg_strt index_array[] = {
+		{ 14, 0xffffffff, 0 }, { 46, 0xffffffff, 0 },
+		{ 205, 0xffffffff, 0 }, { 237, 0xffffffff, 0 },
+		{ 141, 0xf, 0 }, { 145, 0xf, 0 },
+		{ 83, 0xfff, 0 }, { 95, 0xfff, 0 },
+		{ 126, 0xf, 0 }, { 130, 0xf, 0 },
+		{ 140, 0xf, 0 }, { 144, 0xf, 0 },
+		{ 183, 0x1, 0 }, { 184, 0x1, 0 },
+		{ 171, 0x1, 0 }, { 172, 0x1, 0 },
+		{ 173, 0x3f, 0 }, { 357, 0x1, 0 },
+		{ 93, 0x7ff, 0 }, { 81, 0x7ff, 0 },
+	};
+
+	memcpy(&vendor_host->ggc.pha_stas_rx_low32, &index_array[0],
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&vendor_host->ggc.pha_stas_rx_high32, &index_array[1],
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&vendor_host->ggc.pha_stas_tx_low32, &index_array[2],
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&vendor_host->ggc.pha_stas_tx_high32, &index_array[3],
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&vendor_host->ggc.dll_sela_after_mask, &index_array[4],
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&vendor_host->ggc.dll_selb_after_mask, &index_array[5],
+		sizeof(struct t_gg_reg_strt));
+
+	memcpy(&vendor_host->ggc.dll_delay_100m_backup, &index_array[6],
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&vendor_host->ggc.dll_delay_200m_backup, &index_array[7],
+		sizeof(struct t_gg_reg_strt));
+
+	memcpy(&vendor_host->ggc.dll_sela_100m_cfg, &index_array[8],
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&vendor_host->ggc.dll_sela_200m_cfg, &index_array[9],
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&vendor_host->ggc.dll_selb_100m_cfg, &index_array[10],
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&vendor_host->ggc.dll_selb_200m_cfg, &index_array[11],
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&vendor_host->ggc.dll_selb_100m_cfg_en, &index_array[12],
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&vendor_host->ggc.dll_selb_200m_cfg_en, &index_array[13],
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&vendor_host->ggc.internl_tuning_en_100m, &index_array[14],
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&vendor_host->ggc.internl_tuning_en_200m, &index_array[15],
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&vendor_host->ggc.cmd19_cnt_cfg, &index_array[16],
+		sizeof(struct t_gg_reg_strt));
+
+	memcpy(&vendor_host->ggc.inject_failure_for_tuning_enable_cfg,
+	&index_array[17], sizeof(struct t_gg_reg_strt));
+	memcpy(&vendor_host->ggc.inject_failure_for_200m_tuning_cfg,
+	&index_array[18], sizeof(struct t_gg_reg_strt));
+	memcpy(&vendor_host->ggc.inject_failure_for_100m_tuning_cfg,
+	&index_array[19], sizeof(struct t_gg_reg_strt));
+
+	vendor_host->ggc.bh201_drive_strength = 0;
+	vendor_host->ggc.bh201_sdr50_sela_sw_inject = 0;
+	vendor_host->ggc.bh201_sdr50_selb_hw_inject = 0;
+	vendor_host->ggc.bh201_sdr104_selb_hw_inject = 0;
+	vendor_host->ggc.bh201_used = 1;
+	host->flags |= SDHCI_SDR50_NEEDS_TUNING;
+	host->mmc_host_ops.init_card = bht_load;
+
+	if (of_find_property(np, "bh201_drive_strength", NULL))
+		of_property_read_u32_index(np, "bh201_drive_strength", 0,
+			&vendor_host->ggc.bh201_drive_strength);
+	if (of_find_property(np, "bh201_sdr50_sela_sw_inject", NULL))
+		of_property_read_u32_index(np, "bh201_sdr50_sela_sw_inject", 0,
+			&vendor_host->ggc.bh201_sdr50_sela_sw_inject);
+	if (of_find_property(np, "bh201_sdr50_selb_hw_inject", NULL))
+		of_property_read_u32_index(np, "bh201_sdr50_selb_hw_inject", 0,
+			&vendor_host->ggc.bh201_sdr50_selb_hw_inject);
+	if (of_find_property(np, "bh201_sdr104_selb_hw_inject", NULL))
+		of_property_read_u32_index(np, "bh201_sdr104_selb_hw_inject", 0,
+			&vendor_host->ggc.bh201_sdr104_selb_hw_inject);
+
+	vendor_host->ggc.pwr_gpio = of_get_named_gpio(np, "pwr-gpios", 0);
+	if (!gpio_is_valid(vendor_host->ggc.pwr_gpio))
+		dev_err(&vendor_host->pdev->dev, "no pwr-gpio provided !\n");
+	else
+		dev_info(&vendor_host->pdev->dev, "pwr-gpio provided\n");
+
+	vendor_host->ggc.det_gpio = of_get_named_gpio(np, "det-gpios", 0);
+	if (!gpio_is_valid(vendor_host->ggc.det_gpio))
+		dev_err(&vendor_host->pdev->dev, "no det-gpio provided !\n");
+	else
+		dev_info(&vendor_host->pdev->dev, "det-gpio provided\n");
+
+	if (gpio_is_valid(vendor_host->ggc.pwr_gpio)) {
+		devm_gpio_request_one(&vendor_host->pdev->dev, vendor_host->ggc.pwr_gpio,
+			GPIOF_OUT_INIT_LOW, "sprd-1-pwr");
+		pr_debug("%s: detect_gpio pin %d\n",
+			mmc_hostname(host->mmc), vendor_host->ggc.pwr_gpio);
+	} else {
+		pr_err("%s: no detect_gpio provided\n",
+			mmc_hostname(host->mmc));
+	}
+
+	if (gpio_is_valid(vendor_host->ggc.det_gpio)) {
+		devm_gpio_request_one(&vendor_host->pdev->dev, vendor_host->ggc.det_gpio,
+		GPIOF_DIR_IN, "sprd-1-det");
+		pr_debug("%s: detect_gpio pin %d\n",
+			mmc_hostname(host->mmc), vendor_host->ggc.det_gpio);
+	} else {
+		pr_err("%s: no detect_gpio provided\n",
+			mmc_hostname(host->mmc));
+	}
+}
+
+static int sd_select_driver_type(struct mmc_card *card, u8 *status)
+{
+	int card_drv_type, drive_strength, drv_type;
+	int err;
+
+	card->drive_strength = 0;
+
+	card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B;
+
+	drive_strength = mmc_select_drive_strength(card,
+						   card->sw_caps.uhs_max_dtr,
+						   card_drv_type, &drv_type);
+
+	if (drive_strength) {
+		err = mmc_sd_switch(card, 1, 2, drive_strength, status);
+		if (err)
+			return err;
+		if ((status[15] & 0xF) != drive_strength) {
+			pr_warn("%s: Problem setting drive strength!\n",
+				mmc_hostname(card->host));
+			return 0;
+		}
+		card->drive_strength = drive_strength;
+	}
+
+	if (drv_type)
+		mmc_set_driver_type(card->host, drv_type);
+
+	return 0;
+}
+
+/* Get host's max current setting at its current voltage */
+static u32 sd_get_host_max_current(struct mmc_host *host)
+{
+	u32 voltage, max_current;
+
+	voltage = 1 << host->ios.vdd;
+	switch (voltage) {
+	case MMC_VDD_165_195:
+		max_current = host->max_current_180;
+		break;
+	case MMC_VDD_29_30:
+	case MMC_VDD_30_31:
+		max_current = host->max_current_300;
+		break;
+	case MMC_VDD_32_33:
+	case MMC_VDD_33_34:
+		max_current = host->max_current_330;
+		break;
+	default:
+		max_current = 0;
+	}
+
+	return max_current;
+}
+
+static int sd_set_current_limit(struct mmc_card *card, u8 *status)
+{
+	int current_limit = SD_SET_CURRENT_NO_CHANGE;
+	int err;
+	u32 max_current;
+
+	/*
+	 * Current limit switch is only defined for SDR50, SDR104, and DDR50
+	 * bus speed modes. For other bus speed modes, we do not change the
+	 * current limit.
+	 */
+	if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) &&
+	    (card->sd_bus_speed != UHS_SDR104_BUS_SPEED) &&
+	    (card->sd_bus_speed != UHS_DDR50_BUS_SPEED))
+		return 0;
+
+	/*
+	 * Host has different current capabilities when operating at
+	 * different voltages, so find out its max current first.
+	 */
+	max_current = sd_get_host_max_current(card->host);
+
+	/*
+	 * We only check host's capability here, if we set a limit that is
+	 * higher than the card's maximum current, the card will be using its
+	 * maximum current, e.g. if the card's maximum current is 300ma, and
+	 * when we set current limit to 200ma, the card will draw 200ma, and
+	 * when we set current limit to 400/600/800ma, the card will draw its
+	 * maximum 300ma from the host.
+	 *
+	 * The above is incorrect: if we try to set a current limit that is
+	 * not supported by the card, the card can rightfully error out the
+	 * attempt, and remain at the default current limit.  This results
+	 * in a 300mA card being limited to 200mA even though the host
+	 * supports 800mA. Failures seen with SanDisk 8GB UHS cards with
+	 * an iMX6 host. --rmk
+	 */
+	if (max_current >= 800 &&
+	    card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800)
+		current_limit = SD_SET_CURRENT_LIMIT_800;
+	else if (max_current >= 600 &&
+		 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600)
+		current_limit = SD_SET_CURRENT_LIMIT_600;
+	else if (max_current >= 400 &&
+		 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400)
+		current_limit = SD_SET_CURRENT_LIMIT_400;
+	else if (max_current >= 200 &&
+		 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200)
+		current_limit = SD_SET_CURRENT_LIMIT_200;
+
+	if (current_limit != SD_SET_CURRENT_NO_CHANGE) {
+		err = mmc_sd_switch(card, 1, 3, current_limit, status);
+		if (err)
+			return err;
+
+		if (((status[15] >> 4) & 0x0F) != current_limit)
+			pr_warn("%s: Problem setting current limit!\n",
+				mmc_hostname(card->host));
+
+	}
+
+	return 0;
+}
+
+static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status)
+{
+	int err;
+	unsigned int timing = 0;
+
+	switch (card->sd_bus_speed) {
+	case UHS_SDR104_BUS_SPEED:
+		timing = MMC_TIMING_UHS_SDR104;
+		card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR;
+		break;
+	case UHS_DDR50_BUS_SPEED:
+		timing = MMC_TIMING_UHS_DDR50;
+		card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
+		break;
+	case UHS_SDR50_BUS_SPEED:
+		timing = MMC_TIMING_UHS_SDR50;
+		card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
+		break;
+	case UHS_SDR25_BUS_SPEED:
+		timing = MMC_TIMING_UHS_SDR25;
+		card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
+		break;
+	case UHS_SDR12_BUS_SPEED:
+		timing = MMC_TIMING_UHS_SDR12;
+		card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
+		break;
+	default:
+		return 0;
+	}
+
+	err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status);
+	if (err)
+		return err;
+
+	if ((status[16] & 0xF) != card->sd_bus_speed)
+		pr_warn("%s: Problem setting bus speed mode!\n",
+			mmc_hostname(card->host));
+	else {
+		mmc_set_timing(card->host, timing);
+		mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr);
+	}
+
+	return 0;
+}
+
+static void sd_update_bus_speed_mode(struct mmc_card *card)
+{
+	/*
+	 * If the host doesn't support any of the UHS-I modes, fallback on
+	 * default speed.
+	 */
+	if (!mmc_host_uhs(card->host)) {
+		card->sd_bus_speed = 0;
+		return;
+	}
+
+	if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
+		(card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
+		card->sd_bus_speed = UHS_SDR104_BUS_SPEED;
+	} else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
+		(card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
+		card->sd_bus_speed = UHS_DDR50_BUS_SPEED;
+	} else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
+		MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode &
+		SD_MODE_UHS_SDR50)) {
+		card->sd_bus_speed = UHS_SDR50_BUS_SPEED;
+	} else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
+		MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) &&
+		(card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) {
+		card->sd_bus_speed = UHS_SDR25_BUS_SPEED;
+	} else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
+		MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 |
+		MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode &
+		SD_MODE_UHS_SDR12)) {
+		card->sd_bus_speed = UHS_SDR12_BUS_SPEED;
+	}
+}
+
+static int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card,
+				struct mmc_command *cmd)
+{
+	struct mmc_request mrq = {};
+	int i, err = -EIO;
+
+	/*
+	 * We have to resend MMC_APP_CMD for each attempt so
+	 * we cannot use the retries field in mmc_command.
+	 */
+	for (i = 0; i <= MMC_CMD_RETRIES; i++) {
+		err = mmc_app_cmd(host, card);
+		if (err) {
+			/* no point in retrying; no APP commands allowed */
+			if (mmc_host_is_spi(host)) {
+				if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
+					break;
+			}
+			continue;
+		}
+
+		memset(&mrq, 0, sizeof(struct mmc_request));
+
+		memset(cmd->resp, 0, sizeof(cmd->resp));
+		cmd->retries = 0;
+
+		mrq.cmd = cmd;
+		cmd->data = NULL;
+
+		mmc_wait_for_req(host, &mrq);
+
+		err = cmd->error;
+		if (!cmd->error)
+			break;
+
+		/* no point in retrying illegal APP commands */
+		if (mmc_host_is_spi(host)) {
+			if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
+				break;
+		}
+	}
+
+	return err;
+}
+
+static int mmc_app_set_clr_card_detect(struct mmc_card *card)
+{
+	struct mmc_command cmd = {};
+
+	cmd.opcode = 42;
+	cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+
+	return mmc_wait_for_app_cmd(card->host, card, &cmd);
+}
+
+/*
+ * UHS-I specific initialization procedure
+ */
+static int sd_init_uhs_card(struct mmc_card *card)
+{
+	int err;
+	u8 *status;
+
+	if (!(card->csd.cmdclass & CCC_SWITCH))
+		return 0;
+
+	status = kmalloc(64, GFP_KERNEL);
+	if (!status)
+		return -ENOMEM;
+
+	/* Set 4-bit bus width */
+	err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
+	if (err)
+		goto out;
+
+	mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
+
+	/*
+	 * Select the bus speed mode depending on host
+	 * and card capability.
+	 */
+	sd_update_bus_speed_mode(card);
+
+	mmc_app_set_clr_card_detect(card);
+
+	/* Set the driver strength for the card */
+	err = sd_select_driver_type(card, status);
+	if (err)
+		goto out;
+
+	/* Set current limit for the card */
+	err = sd_set_current_limit(card, status);
+	if (err)
+		goto out;
+
+	/* Set bus speed mode of the card */
+	err = sd_set_bus_speed_mode(card, status);
+	if (err)
+		goto out;
+
+	/*
+	 * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and
+	 * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104.
+	 */
+	if (!mmc_host_is_spi(card->host) &&
+		(card->host->ios.timing == MMC_TIMING_UHS_SDR50 ||
+		 card->host->ios.timing == MMC_TIMING_UHS_DDR50 ||
+		 card->host->ios.timing == MMC_TIMING_UHS_SDR104)) {
+		err = mmc_execute_tuning(card);
+
+		/*
+		 * As SD Specifications Part1 Physical Layer Specification
+		 * Version 3.01 says, CMD19 tuning is available for unlocked
+		 * cards in transfer state of 1.8V signaling mode. The small
+		 * difference between v3.00 and 3.01 spec means that CMD19
+		 * tuning is also available for DDR50 mode.
+		 */
+		if (err && card->host->ios.timing == MMC_TIMING_UHS_DDR50) {
+			pr_warn("%s: ddr50 tuning failed\n",
+				mmc_hostname(card->host));
+			err = 0;
+		}
+	}
+
+out:
+	kfree(status);
+
+	return err;
+}
+
+static bool mmc_sd_card_using_v18(struct mmc_card *card)
+{
+	/*
+	 * According to the SD spec., the Bus Speed Mode (function group 1) bits
+	 * 2 to 4 are zero if the card is initialized at 3.3V signal level. Thus
+	 * they can be used to determine if the card has already switched to
+	 * 1.8V signaling.
+	 */
+	return card->sw_caps.sd3_bus_mode &
+	       (SD_MODE_UHS_SDR50 | SD_MODE_UHS_SDR104 | SD_MODE_UHS_DDR50);
+}
+
+/*
+ * Fetches and decodes switch information
+ */
+static int mmc_read_switch(struct mmc_card *card)
+{
+	int err;
+	u8 *status;
+
+	if (card->scr.sda_vsn < SCR_SPEC_VER_1)
+		return 0;
+
+	if (!(card->csd.cmdclass & CCC_SWITCH)) {
+		pr_warn("%s: card lacks mandatory switch function, performance might suffer\n",
+			mmc_hostname(card->host));
+		return 0;
+	}
+
+	status = kmalloc(64, GFP_KERNEL);
+	if (!status)
+		return -ENOMEM;
+
+	/*
+	 * Find out the card's support bits with a mode 0 operation.
+	 * The argument does not matter, as the support bits do not
+	 * change with the arguments.
+	 */
+	err = mmc_sd_switch(card, 0, 0, 0, status);
+	if (err) {
+		/*
+		 * If the host or the card can't do the switch,
+		 * fail more gracefully.
+		 */
+		if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
+			goto out;
+
+		pr_warn("%s: problem reading Bus Speed modes\n",
+			mmc_hostname(card->host));
+		err = 0;
+
+		goto out;
+	}
+
+	if (status[13] & SD_MODE_HIGH_SPEED)
+		card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR;
+
+	if (card->scr.sda_spec3) {
+		card->sw_caps.sd3_bus_mode = status[13];
+		/* Driver Strengths supported by the card */
+		card->sw_caps.sd3_drv_type = status[9];
+		card->sw_caps.sd3_curr_limit = status[7] | status[6] << 8;
+	}
+
+out:
+	kfree(status);
+
+	return err;
+}
+
+/*
+ * Handle the detection and initialisation of a card.
+ *
+ * In the case of a resume, "oldcard" will contain the card
+ * we're trying to reinitialise.
+ */
+int sd_init_card(struct mmc_host *host, u32 ocr,
+	struct mmc_card *oldcard)
+{
+	struct mmc_card *card;
+	int err;
+	u32 cid[4];
+	u32 rocr = 0;
+	bool v18_fixup_failed = false;
+
+	WARN_ON(!host->claimed);
+retry:
+	err = mmc_sd_get_cid(host, ocr, cid, &rocr);
+	if (err)
+		return err;
+
+	if (oldcard) {
+		if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
+			pr_debug("%s: Perhaps the card was replaced\n",
+				mmc_hostname(host));
+			return -ENOENT;
+		}
+
+		card = oldcard;
+	} else {
+		/*
+		 * Allocate card structure.
+		 */
+		card = mmc_alloc_card(host, &sd_type);
+		if (IS_ERR(card))
+			return PTR_ERR(card);
+
+		card->ocr = ocr;
+		card->type = MMC_TYPE_SD;
+		memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
+	}
+
+	/*
+	 * Call the optional HC's init_card function to handle quirks.
+	 */
+	if (host->ops->init_card)
+		host->ops->init_card(host, card);
+
+	/*
+	 * For native busses:  get card RCA and quit open drain mode.
+	 */
+	if (!mmc_host_is_spi(host)) {
+		err = mmc_send_relative_addr(host, &card->rca);
+		if (err)
+			goto free_card;
+	}
+
+	if (!oldcard) {
+		err = mmc_sd_get_csd(host, card);
+		if (err)
+			goto free_card;
+
+		mmc_decode_cid(card);
+	}
+
+	/*
+	 * handling only for cards supporting DSR and hosts requesting
+	 * DSR configuration
+	 */
+	if (card->csd.dsr_imp && host->dsr_req)
+		mmc_set_dsr(host);
+
+	/*
+	 * Select card, as all following commands rely on that.
+	 */
+	if (!mmc_host_is_spi(host)) {
+		err = mmc_select_card(card);
+		if (err)
+			goto free_card;
+	}
+
+	err = mmc_sd_setup_card(host, card, oldcard != NULL);
+	if (err)
+		goto free_card;
+
+	/*
+	 * If the card has not been power cycled, it may still be using 1.8V
+	 * signaling. Detect that situation and try to initialize a UHS-I (1.8V)
+	 * transfer mode.
+	 */
+	if (!v18_fixup_failed && !mmc_host_is_spi(host) && mmc_host_uhs(host) &&
+	    mmc_sd_card_using_v18(card) &&
+	    host->ios.signal_voltage != MMC_SIGNAL_VOLTAGE_180) {
+		/*
+		 * Re-read switch information in case it has changed since
+		 * oldcard was initialized.
+		 */
+		if (oldcard) {
+			err = mmc_read_switch(card);
+			if (err)
+				goto free_card;
+		}
+		if (mmc_sd_card_using_v18(card)) {
+			if (mmc_host_set_uhs_voltage(host) ||
+			    sd_init_uhs_card(card)) {
+				v18_fixup_failed = true;
+				mmc_power_cycle(host, ocr);
+				if (!oldcard)
+					mmc_remove_card(card);
+				goto retry;
+			}
+			goto done;
+		}
+	}
+
+	/* Initialization sequence for UHS-I cards */
+	if (rocr & SD_ROCR_S18A && mmc_host_uhs(host)) {
+		err = sd_init_uhs_card(card);
+		if (err)
+			goto free_card;
+	} else {
+		/*
+		 * Switch to wider bus (if supported).
+		 */
+		if ((host->caps & MMC_CAP_4_BIT_DATA) &&
+			(card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
+			err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
+			if (err)
+				goto free_card;
+
+			mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
+		}
+
+		mmc_app_set_clr_card_detect(card);
+
+		/*
+		 * Attempt to change to high-speed (if supported)
+		 */
+		err = mmc_sd_switch_hs(card);
+		if (err > 0)
+			mmc_set_timing(card->host, MMC_TIMING_SD_HS);
+		else if (err)
+			goto free_card;
+
+		/*
+		 * Set bus speed.
+		 */
+		mmc_set_clock(host, mmc_sd_get_max_clock(card));
+	}
+
+	if (host->caps2 & MMC_CAP2_AVOID_3_3V &&
+	    host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
+		pr_err("%s: Host failed to negotiate down from 3.3V\n",
+			mmc_hostname(host));
+		err = -EINVAL;
+		goto free_card;
+	}
+done:
+
+	host->card = card;
+	return 0;
+
+free_card:
+	if (!oldcard)
+		mmc_remove_card(card);
+
+	return err;
+}
+
+
+/*
+ * Host is being removed. Free up the current card.
+ */
+static void mmc_sd_remove(struct mmc_host *host)
+{
+	mmc_remove_card(host->card);
+	host->card = NULL;
+}
+
+/*
+ * Card detection - card is alive.
+ */
+static int mmc_sd_alive(struct mmc_host *host)
+{
+	return mmc_send_status(host->card, NULL);
+}
+
+/*
+ * Card detection callback from host.
+ */
+static void mmc_sd_detect(struct mmc_host *host)
+{
+	int err;
+
+	mmc_get_card(host->card, NULL);
+
+	/*
+	 * Just check if our card has been removed.
+	 */
+	err = _mmc_detect_card_removed(host);
+
+	mmc_put_card(host->card, NULL);
+
+	if (err) {
+		mmc_sd_remove(host);
+
+		mmc_claim_host(host);
+		mmc_detach_bus(host);
+		mmc_power_off(host);
+		mmc_release_host(host);
+	}
+}
+
+static int _mmc_sd_suspend(struct mmc_host *host)
+{
+	int err = 0;
+
+	mmc_claim_host(host);
+
+	if (mmc_card_suspended(host->card))
+		goto out;
+
+	if (!mmc_host_is_spi(host))
+		err = mmc_deselect_cards(host);
+
+	if (!err) {
+		mmc_power_off(host);
+		mmc_card_set_suspended(host->card);
+	}
+
+out:
+	mmc_release_host(host);
+	return err;
+}
+
+/*
+ * Callback for suspend
+ */
+static int mmc_sd_suspend(struct mmc_host *host)
+{
+	int err;
+
+	err = _mmc_sd_suspend(host);
+	if (!err) {
+		pm_runtime_disable(&host->card->dev);
+		pm_runtime_set_suspended(&host->card->dev);
+	}
+
+	return err;
+}
+
+/*
+ * This function tries to determine if the same card is still present
+ * and, if so, restore all state to it.
+ */
+static int _mmc_sd_resume(struct mmc_host *host)
+{
+	int err = 0;
+
+	mmc_claim_host(host);
+
+	if (!mmc_card_suspended(host->card))
+		goto out;
+
+	mmc_power_up(host, host->card->ocr);
+	err = sd_init_card(host, host->card->ocr, host->card);
+	mmc_card_clr_suspended(host->card);
+
+out:
+	mmc_release_host(host);
+	return err;
+}
+
+/*
+ * Callback for resume
+ */
+static int mmc_sd_resume(struct mmc_host *host)
+{
+	pm_runtime_enable(&host->card->dev);
+	return 0;
+}
+
+/*
+ * Callback for runtime_suspend.
+ */
+static int mmc_sd_runtime_suspend(struct mmc_host *host)
+{
+	int err;
+
+	if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
+		return 0;
+
+	err = _mmc_sd_suspend(host);
+	if (err)
+		pr_err("%s: error %d doing aggressive suspend\n",
+			mmc_hostname(host), err);
+
+	return err;
+}
+
+/*
+ * Callback for runtime_resume.
+ */
+static int mmc_sd_runtime_resume(struct mmc_host *host)
+{
+	int err;
+
+	err = _mmc_sd_resume(host);
+	if (err && err != -ENOMEDIUM)
+		pr_err("%s: error %d doing runtime resume\n",
+			mmc_hostname(host), err);
+
+	return 0;
+}
+
+static int mmc_sd_hw_reset(struct mmc_host *host)
+{
+	mmc_power_cycle(host, host->card->ocr);
+	return sd_init_card(host, host->card->ocr, host->card);
+}
+
+static const struct mmc_bus_ops mmc_sd_ops = {
+	.remove = mmc_sd_remove,
+	.detect = mmc_sd_detect,
+	.runtime_suspend = mmc_sd_runtime_suspend,
+	.runtime_resume = mmc_sd_runtime_resume,
+	.suspend = mmc_sd_suspend,
+	.resume = mmc_sd_resume,
+	.alive = mmc_sd_alive,
+	.shutdown = mmc_sd_suspend,
+	.hw_reset = mmc_sd_hw_reset,
+};
+
+/*
+ * Starting point for SD card init.
+ */
+static int attach_sd(struct mmc_host *host)
+{
+	int err;
+	u32 ocr, rocr;
+
+	WARN_ON(!host->claimed);
+
+	err = mmc_send_app_op_cond(host, 0, &ocr);
+	if (err)
+		return err;
+
+	mmc_attach_bus(host, &mmc_sd_ops);
+	if (host->ocr_avail_sd)
+		host->ocr_avail = host->ocr_avail_sd;
+
+	/*
+	 * We need to get OCR a different way for SPI.
+	 */
+	if (mmc_host_is_spi(host)) {
+		mmc_go_idle(host);
+
+		err = mmc_spi_read_ocr(host, 0, &ocr);
+		if (err)
+			goto err;
+	}
+
+	/*
+	 * Some SD cards claims an out of spec VDD voltage range. Let's treat
+	 * these bits as being in-valid and especially also bit7.
+	 */
+	ocr &= ~0x7FFF;
+
+	rocr = mmc_select_voltage(host, ocr);
+
+	/*
+	 * Can we support the voltage(s) of the card(s)?
+	 */
+	if (!rocr) {
+		err = -EINVAL;
+		goto err;
+	}
+
+	/*
+	 * Detect and init the card.
+	 */
+	err = sd_init_card(host, rocr, NULL);
+	if (err)
+		goto err;
+
+	mmc_release_host(host);
+	err = mmc_add_card(host->card);
+	if (err)
+		goto remove_card;
+
+	mmc_claim_host(host);
+	return 0;
+
+remove_card:
+	mmc_remove_card(host->card);
+	host->card = NULL;
+	mmc_claim_host(host);
+err:
+	mmc_detach_bus(host);
+
+	pr_err("%s: error %d whilst initialising SD card\n",
+		mmc_hostname(host), err);
+
+	return err;
+}
+
+static int mmc_schedule_delayed_work(struct delayed_work *work,
+				     unsigned long delay)
+{
+	/*
+	 * We use the system_freezable_wq, because of two reasons.
+	 * First, it allows several works (not the same work item) to be
+	 * executed simultaneously. Second, the queue becomes frozen when
+	 * userspace becomes frozen during system PM.
+	 */
+	return queue_delayed_work(system_freezable_wq, work, delay);
+}
+
+static void mmc_hw_reset_for_init(struct mmc_host *host)
+{
+	mmc_pwrseq_reset(host);
+
+	if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
+		return;
+	host->ops->hw_reset(host);
+}
+
+static int mmc_rescan_try_freq(struct mmc_host *host, unsigned int freq)
+{
+	host->f_init = freq;
+
+	pr_debug("%s: %s: trying to init card at %u Hz\n",
+		mmc_hostname(host), __func__, host->f_init);
+
+	mmc_power_up(host, host->ocr_avail);
+
+	/*
+	 * Some eMMCs (with VCCQ always on) may not be reset after power up, so
+	 * do a hardware reset if possible.
+	 */
+	mmc_hw_reset_for_init(host);
+
+	/*
+	 * sdio_reset sends CMD52 to reset card.  Since we do not know
+	 * if the card is being re-initialized, just send it.  CMD52
+	 * should be ignored by SD/eMMC cards.
+	 * Skip it if we already know that we do not support SDIO commands
+	 */
+	if (!(host->caps2 & MMC_CAP2_NO_SDIO))
+		sdio_reset(host);
+
+	mmc_go_idle(host);
+
+	if (!(host->caps2 & MMC_CAP2_NO_SD))
+		mmc_send_if_cond(host, host->ocr_avail);
+
+	/* Order's important: probe SDIO, then SD, then MMC */
+	if (!(host->caps2 & MMC_CAP2_NO_SDIO))
+		if (!mmc_attach_sdio(host))
+			return 0;
+
+	if (!(host->caps2 & MMC_CAP2_NO_SD))
+		if (!attach_sd(host))
+			return 0;
+
+	if (!(host->caps2 & MMC_CAP2_NO_MMC))
+		if (!mmc_attach_mmc(host))
+			return 0;
+
+	mmc_power_off(host);
+	return -EIO;
+}
+
+/*
+ * Cleanup when the last reference to the bus operator is dropped.
+ */
+static void __mmc_release_bus(struct mmc_host *host)
+{
+	WARN_ON(!host->bus_dead);
+
+	host->bus_ops = NULL;
+}
+
+/*
+ * Increase reference count of bus operator
+ */
+static inline void mmc_bus_get(struct mmc_host *host)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->lock, flags);
+	host->bus_refs++;
+	spin_unlock_irqrestore(&host->lock, flags);
+}
+
+/*
+ * Decrease reference count of bus operator and free it if
+ * it is the last reference.
+ */
+static inline void mmc_bus_put(struct mmc_host *host)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->lock, flags);
+	host->bus_refs--;
+	if ((host->bus_refs == 0) && host->bus_ops)
+		__mmc_release_bus(host);
+	spin_unlock_irqrestore(&host->lock, flags);
+}
+
+void mmc_rescan_bayhub(struct work_struct *work)
+{
+	struct mmc_host *host =
+		container_of(work, struct mmc_host, detect.work);
+	int i;
+
+	if (host->rescan_disable)
+		return;
+
+	/* If there is a non-removable card registered, only scan once */
+	if (!mmc_card_is_removable(host) && host->rescan_entered)
+		return;
+	host->rescan_entered = 1;
+
+	if (host->trigger_card_event && host->ops->card_event) {
+		mmc_claim_host(host);
+		host->ops->card_event(host);
+		mmc_release_host(host);
+		host->trigger_card_event = false;
+	}
+
+	mmc_bus_get(host);
+
+	/* Verify a registered card to be functional, else remove it. */
+	if (host->bus_ops && !host->bus_dead)
+		host->bus_ops->detect(host);
+
+	host->detect_change = 0;
+
+	/*
+	 * Let mmc_bus_put() free the bus/bus_ops if we've found that
+	 * the card is no longer present.
+	 */
+	mmc_bus_put(host);
+	mmc_bus_get(host);
+
+	/* if there still is a card present, stop here */
+	if (host->bus_ops != NULL) {
+		mmc_bus_put(host);
+		goto out;
+	}
+
+	/*
+	 * Only we can add a new handler, so it's safe to
+	 * release the lock here.
+	 */
+	mmc_bus_put(host);
+
+	mmc_claim_host(host);
+	if (mmc_card_is_removable(host) && host->ops->get_cd &&
+			host->ops->get_cd(host) == 0) {
+		mmc_power_off(host);
+		mmc_release_host(host);
+		goto out;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(freqs); i++) {
+		if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min)))
+			break;
+		if (freqs[i] <= host->f_min)
+			break;
+	}
+	mmc_release_host(host);
+
+ out:
+	if (host->caps & MMC_CAP_NEEDS_POLL)
+		mmc_schedule_delayed_work(&host->detect, HZ);
+}
+
+static int card_deselect_card(struct sdhci_host *host)
+{
+	int ret = -1;
+	int err;
+	struct mmc_host *mmc = host->mmc;
+	struct mmc_command cmd = { 0 };
+
+	cmd.opcode = MMC_SELECT_CARD;
+	cmd.arg = 0;
+	cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
+
+	err = mmc_wait_for_cmd(mmc, &cmd, 3);
+	if (err)
+		pr_err("BHT ERR: CMD7 FAIL: err = %d\n", err);
+	else
+		ret = 0;
+
+	return ret;
+}
+
+static bool enter_exit_emulator_mode(struct sdhci_host *host, bool b_enter)
+{
+	bool ret = FALSE;
+	u8 times = b_enter ? 2 : 1;
+	u8 i = 0;
+
+	for (i = 0; i < times; i++) {
+		ret = card_deselect_card(host);
+		if (ret)
+			break;
+	}
+	return ret;
+}
+
+static bool _gg_emulator_read_only(struct sdhci_host *host,
+				   u8 *in_data, u32 datalen)
+{
+	struct mmc_host *mmc = host->mmc;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	int rc = 0;
+	u8 *data1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
+	struct mmc_request mrq = { 0 };
+	struct mmc_command cmd = { 0 };
+	struct mmc_data data = { 0 };
+	struct scatterlist sg;
+
+	if (!data1) {
+		pr_err("BHT MSG:gg read no memory\n");
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	sg_init_one(&sg, data1, 512);
+
+	cmd.opcode = MMC_READ_SINGLE_BLOCK;
+	cmd.arg = 0;
+	cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+	data.blksz = 512;
+	data.blocks = 1;
+	data.flags = MMC_DATA_READ;
+	data.timeout_ns = 1000 * 1000 * 1000;
+	data.sg = &sg;
+	data.sg_len = 1;
+	mrq.cmd = &cmd;
+	mrq.data = &data;
+	mrq.stop = NULL;
+
+	mmc_wait_for_req(mmc, &mrq);
+	memcpy(in_data, data1, datalen);
+
+	kfree(data1);
+
+	if ((cmd.error == -EILSEQ) || (data.error == -EILSEQ))
+		vendor_host->ggc.sdr50_notuning_crc_error_flag = 1;
+
+	if (cmd.error || data.error)
+		rc = -1;
+out:
+	return rc;
+}
+
+static void host_cmddat_line_reset(struct sdhci_host *host)
+{
+	if (host->ops->reset)
+		host->ops->reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
+}
+
+static int gg_select_card_spec(struct sdhci_host *host)
+{
+	int err;
+	struct mmc_command cmd = { 0 };
+	struct mmc_card *card = host->mmc->card;
+
+	cmd.opcode = MMC_SELECT_CARD;
+
+	if (card) {
+		cmd.arg = card->rca << 16;
+		cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+	} else {
+		cmd.arg = 0;
+		cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
+	}
+
+	err = mmc_wait_for_cmd(host->mmc, &cmd, 0);
+	if (err == -EILSEQ) {
+		host_cmddat_line_reset(host);
+
+		memset(&cmd, 0, sizeof(struct mmc_command));
+		cmd.opcode = 5;
+		cmd.arg = 0;
+		cmd.flags =
+			MMC_RSP_SPI_R4 | MMC_RSP_R4 | MMC_CMD_BCR;
+
+		mmc_wait_for_cmd(host->mmc, &cmd, 0);
+
+		pr_err("BHT ERR:%s: CMD7 CRC\n", __func__);
+		host_cmddat_line_reset(host);
+		return 0;
+	}
+	if (err == -ETIMEDOUT) {
+		pr_err("BHT ERR:%s: CMD7 timeout\n", __func__);
+		host_cmddat_line_reset(host);
+		return err;
+	}
+	return 0;
+}
+
+static bool gg_emulator_read_ext(struct sdhci_host *host, bool *card_status,
+					bool *read_status, u8 *data, u32 datalen)
+{
+	bool ret = FALSE;
+	bool card_ret = TRUE;
+	bool rd_ret = FALSE;
+
+	if (enter_exit_emulator_mode(host, TRUE) == 0)
+		ret = TRUE;
+	else
+		ret = FALSE;
+	if (!ret)
+		goto exit;
+
+	if (_gg_emulator_read_only(host, data, datalen) == 0)
+		rd_ret = TRUE;
+	else
+		rd_ret = FALSE;
+
+	if (enter_exit_emulator_mode(host, FALSE) == 0)
+		ret = TRUE;
+	else
+		ret = FALSE;
+
+	if (!ret)
+		goto exit;
+
+	if (gg_select_card_spec(host) == 0)
+		card_ret = TRUE;
+	else
+		card_ret = FALSE;
+
+	if (!rd_ret)
+		pr_err("BHT ERR:GGC read status error\n");
+
+exit:
+	if (!card_ret) {
+		pr_err("BHT ERR:GGC Emulator exit Fail!!\n");
+		ret = FALSE;
+	}
+
+	if (card_status)
+		*card_status = ret;
+
+	if (read_status)
+		*read_status = rd_ret;
+
+	if (rd_ret && !ret)
+		pr_err("BHT ERR:data read ok, but exit NG\n");
+	else if (!rd_ret && ret)
+		pr_err("BHT ERR:data read NG, but exit ok\n");
+
+	return ret;
+}
+
+static void _status_bit_2_bt(int tar, int *byt, int *bit)
+{
+	*byt = tar / 8;
+	*bit = tar % 8;
+}
+
+static u32 _read_status_data_read_register(u8 *cfg, struct t_gg_reg_strt *bts)
+{
+	u32 rv = 0;
+	u32 msk = bts->mask;
+	int byt = 0, bit = 0;
+	int i = 0;
+
+	do {
+		_status_bit_2_bt(bts->ofs + i, &byt, &bit);
+		if (cfg[byt] & (1 << bit))
+			rv |= 1 << i;
+
+		i++;
+		msk >>= 1;
+		if (msk == 0)
+			break;
+	} while (1);
+	return rv;
+}
+
+static bool ggc_read_registers_ext(struct sdhci_host *host,
+		bool *card_status, bool *read_status,
+		struct t_gg_reg_strt *gg_reg_arr, u8 num)
+{
+	u8 get_idx = 0;
+	bool ret = FALSE;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct ggc_platform_t *ggc = &vendor_host->ggc;
+
+	if (read_status)
+		*read_status = FALSE;
+	if (card_status)
+		*card_status = FALSE;
+
+	memset(ggc->_cur_read_buf, 0, 512);
+	ret = gg_emulator_read_ext(host, card_status, read_status, ggc->_cur_read_buf, 512);
+	if (read_status == FALSE)
+		goto exit;
+
+	for (get_idx = 0; get_idx < num; get_idx++)
+		(gg_reg_arr + get_idx)->value =
+			_read_status_data_read_register(ggc->_cur_read_buf, (gg_reg_arr + get_idx));
+
+exit:
+	return ret;
+}
+
+static bool gg_emulator_read(struct sdhci_host *host, u8 *data, u32 datalen)
+{
+	bool ret = FALSE;
+	bool rd_ret = FALSE;
+
+	ret = enter_exit_emulator_mode(host, TRUE);
+	if (ret)
+		goto exit;
+
+	rd_ret = _gg_emulator_read_only(host, data, datalen);
+
+	ret = enter_exit_emulator_mode(host, FALSE);
+	if (ret)
+		goto exit;
+
+	ret = gg_select_card_spec(host);
+
+exit:
+	if (rd_ret)
+		pr_err("BHT ERR:GGC read status error\n");
+
+	if (ret)
+		pr_err("BHT ERR:GGC Emulator exit Fail!!\n");
+
+	if (rd_ret == 0 && ret) {
+		pr_err("BHT ERR:data read ok, but exit NG\n");
+		ret = 0;
+	}
+
+	if (rd_ret && ret == 0) {
+		pr_err("BHT ERR:data read NG, but exit ok\n");
+		ret = -1;
+	}
+
+	return ret ? FALSE : TRUE;
+}
+
+static bool _ggc_emulator_write_only(struct sdhci_host *host,
+				     u8 *in_data, u32 datalen)
+{
+	struct mmc_host *mmc = host->mmc;
+	int rc = 0;
+	u8 *data1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
+	struct mmc_request mrq = { 0 };
+	struct mmc_command cmd = { 0 };
+	struct mmc_data data = { 0 };
+	struct scatterlist sg;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+
+	if (!data1) {
+		pr_err("BHT MSG:gg write no memory\n");
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	memcpy(data1, in_data, datalen);
+	sg_init_one(&sg, data1, 512);
+
+	cmd.opcode = MMC_WRITE_BLOCK;
+	cmd.arg = 0;
+	cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+	data.blksz = 512;
+	data.blocks = 1;
+	data.flags = MMC_DATA_WRITE;
+	data.timeout_ns = 1000 * 1000 * 1000;
+	data.sg = &sg;
+	data.sg_len = 1;
+	mrq.cmd = &cmd;
+	mrq.data = &data;
+	mrq.stop = NULL;
+
+	mmc_wait_for_req(mmc, &mrq);
+
+	if (cmd.error == -EILSEQ)
+		vendor_host->ggc.sdr50_notuning_crc_error_flag = 1;
+
+	kfree(data1);
+out:
+	return rc;
+}
+
+static bool gg_emulator_write(struct sdhci_host *host, u8 *data, u32 datalen)
+{
+	bool ret = FALSE;
+	bool wr_ret = FALSE;
+	u32 i = 0;
+	u32 reg;
+
+	ret = enter_exit_emulator_mode(host, TRUE);
+	if (ret)
+		goto exit;
+
+	pr_debug("BHT MSG: dump config data\n");
+	for (i = 0; i < (datalen/sizeof(u32)); i++)	{
+		memcpy(&reg, data+i*sizeof(u32), sizeof(u32));
+		pr_debug("BHT MSG:\tggc_reg32[%03d]=0x%08x\n", i, reg);
+	}
+
+	_ggc_emulator_write_only(host, data, datalen);
+	wr_ret = TRUE;
+
+	ret = enter_exit_emulator_mode(host, FALSE);
+	if (ret)
+		goto exit;
+
+	ret = gg_select_card_spec(host);
+
+exit:
+	if (wr_ret == FALSE)
+		ret = FALSE;
+
+	if (ret == FALSE)
+		pr_err("BHT ERR:%s: GGC Emulator Write Fail!!\n", __func__);
+
+	return ret;
+}
+
+static bool get_gg_reg_cur(struct sdhci_host *host, u8 *data,
+		    struct t_gg_reg_strt *gg_reg_arr, u8 num)
+{
+	u8 get_idx = 0;
+	bool ret = FALSE;
+
+	/* read ggc register */
+	memset(data, 0, 512);
+	ret = gg_emulator_read(host, data, 512);
+
+	if (ret == FALSE)
+		goto exit;
+
+	/* read the offset bits value */
+	for (get_idx = 0; get_idx < num; get_idx++) {
+		(gg_reg_arr + get_idx)->value =
+		    read_ram_bits_ofs_mask(data, (gg_reg_arr + get_idx));
+	}
+exit:
+	return ret;
+}
+
+static void chg_gg_reg_cur_val(struct ggc_platform_t  *ggc, u8 *data,
+	struct t_gg_reg_strt *gg_reg_arr, u8 num, bool b_sav_chg)
+{
+	u8 chg_idx = 0;
+
+	for (chg_idx = 0; chg_idx < num; chg_idx++) {
+		/* modify the ggc register bit value */
+		cfg_write_bits_ofs_mask(data, (gg_reg_arr + chg_idx),
+					(gg_reg_arr + chg_idx)->value);
+	}
+
+	if (b_sav_chg)
+		set_gg_reg_cur_val(ggc, data, 64);
+}
+
+static void log_bin(u32 n)
+{
+	int i = 0;
+	u8 tb[33] = { 0 };
+
+	for (i = 0; i < 32; i++) {
+		if (n & (1 << i))
+			tb[i] = '1';
+		else
+			tb[i] = '0';
+	}
+	pr_debug("BHT MSG:bin:%s\n", tb);
+}
+
+static void phase_str(u8 *tb, u32 n)
+{
+	int i = 0;
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		if (n & (1 << i))
+			tb[i] = '1';
+		else
+			tb[i] = '0';
+	}
+	tb[TUNING_PHASE_SIZE] = 0;
+}
+
+static int get_bit_number(u32 n)
+{
+	int i = 0;
+	int cnt = 0;
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		if (n & (1 << i))
+			cnt++;
+	}
+	return cnt;
+}
+
+static bool gg_emulator_write_ext(struct sdhci_host *host, bool *card_status, u8 *data, u32 datalen)
+{
+	bool ret = FALSE;
+	bool wr_ret = FALSE;
+
+	ret = enter_exit_emulator_mode(host, TRUE);
+	if (ret)
+		goto exit;
+
+	_ggc_emulator_write_only(host, data, datalen);
+	wr_ret = TRUE;
+
+	ret = enter_exit_emulator_mode(host, FALSE);
+	if (ret)
+		goto exit;
+
+	ret = (gg_select_card_spec(host) == 0) ? TRUE : FALSE;
+	if (ret == FALSE) {
+		if (card_status)
+			*card_status = FALSE;
+	}
+
+exit:
+	if (wr_ret == FALSE)
+		ret = FALSE;
+
+	if (ret == FALSE)
+		pr_err("BHT ERR:%s: GGC Emulator Write Fail!!\n", __func__);
+
+	return ret;
+}
+
+static bool ggc_set_output_tuning_phase_ext(struct sdhci_host *host,
+		bool *card_status, int sela, int selb)
+{
+	bool ret = TRUE;
+	u8 data[512] = { 0 };
+	struct t_gg_reg_strt gg_reg_arr[8];
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+
+	get_gg_reg_cur_val(&vendor_host->ggc, data, 64);
+	memcpy(&gg_reg_arr[0], &vendor_host->ggc.dll_sela_100m_cfg,
+			sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[1], &vendor_host->ggc.dll_sela_200m_cfg,
+			sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[2], &vendor_host->ggc.dll_selb_100m_cfg,
+			sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[3], &vendor_host->ggc.dll_selb_200m_cfg,
+			sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[4], &vendor_host->ggc.dll_selb_100m_cfg_en,
+			sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[5], &vendor_host->ggc.dll_selb_200m_cfg_en,
+			sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[6], &vendor_host->ggc.internl_tuning_en_100m,
+		  sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[7], &vendor_host->ggc.internl_tuning_en_200m,
+		  sizeof(struct t_gg_reg_strt));
+	gg_reg_arr[0].value = sela;
+	gg_reg_arr[1].value = sela;
+	gg_reg_arr[2].value = selb;
+	gg_reg_arr[3].value = selb;
+	gg_reg_arr[4].value = 1;
+	gg_reg_arr[5].value = 1;
+	gg_reg_arr[6].value = 1;
+	gg_reg_arr[7].value = 1;
+	if (card_status)
+		*card_status = TRUE;
+	chg_gg_reg_cur_val(&vendor_host->ggc, data, gg_reg_arr, 8, TRUE);
+	ret = gg_emulator_write_ext(host, card_status, data, 512);
+	return ret;
+}
+
+static bool gg_fix_output_tuning_phase(struct sdhci_host *host, int sela, int selb)
+{
+	u8 data[512] = { 0 };
+	struct t_gg_reg_strt gg_reg_arr[10];
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+
+	pr_debug("BHT MSG: %s - sela dll: %x, selb dll: %x\n", __func__, sela,
+		selb);
+
+	get_gg_reg_cur_val(&vendor_host->ggc, data, 64);
+
+	memcpy(&gg_reg_arr[0], &vendor_host->ggc.dll_sela_100m_cfg,
+			sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[1], &vendor_host->ggc.dll_sela_200m_cfg,
+			sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[2], &vendor_host->ggc.dll_selb_100m_cfg,
+			sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[3], &vendor_host->ggc.dll_selb_200m_cfg,
+			sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[4], &vendor_host->ggc.dll_selb_100m_cfg_en,
+			sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[5], &vendor_host->ggc.dll_selb_200m_cfg_en,
+			sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[6], &vendor_host->ggc.internl_tuning_en_100m,
+		  sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[7], &vendor_host->ggc.internl_tuning_en_200m,
+		  sizeof(struct t_gg_reg_strt));
+	gg_reg_arr[0].value = sela;
+	gg_reg_arr[1].value = sela;
+	gg_reg_arr[2].value = selb;
+	gg_reg_arr[3].value = selb;
+	gg_reg_arr[4].value = 1;
+	gg_reg_arr[5].value = 1;
+	gg_reg_arr[6].value = 0;
+	gg_reg_arr[7].value = 0;
+
+	chg_gg_reg_cur_val(&vendor_host->ggc, data, gg_reg_arr, 8, TRUE);
+
+	return gg_emulator_write(host, data, 512);
+}
+
+static void gen_array_data(u32 low32, u32 high32, u32 *ptw)
+{
+	u8 tu_res_per[6][TUNING_PHASE_SIZE];
+	u8 i = 0, j = 0;
+	u8 i_mode = 0;
+	u32 tw = 0;
+
+	memset(tu_res_per, 1, sizeof(tu_res_per));
+	for (i = 0; i < 64; i++) {
+		u32 tmp_data = (i < 32) ? low32 : high32;
+
+		tu_res_per[i / TUNING_PHASE_SIZE][i % TUNING_PHASE_SIZE] =
+		    (tmp_data & (1 << (i % 32))) >> (i % 32);
+	}
+
+	for (i_mode = 0; i_mode < TUNING_PHASE_SIZE; i_mode++) {
+		for (j = 0; j < 6; j++) {
+			if (tu_res_per[j][i_mode] != 0)
+				tw |= (1 << i_mode);
+			else {
+				tw &= ~(1 << i_mode);
+				break;
+			}
+		}
+	}
+	if (ptw)
+		*ptw = tw;
+}
+
+static bool sw_calc_tuning_result(struct sdhci_host *host, u32 *tx_selb,
+			   u32 *all_selb, u64 *raw_tx_selb)
+{
+	bool ret = FALSE;
+	u8 data[512] = { 0 };
+	u32 selb_status_tx_low32 = 0, selb_status_tx_high32 = 0;
+	u32 selb_status_ggc_low32 = 0, selb_status_ggc_high32 = 0;
+	struct t_gg_reg_strt gg_reg_arr[6];
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+
+	memcpy(&gg_reg_arr[0], &vendor_host->ggc.pha_stas_tx_low32, sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[1], &vendor_host->ggc.pha_stas_tx_high32, sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[2], &vendor_host->ggc.pha_stas_rx_low32, sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[3], &vendor_host->ggc.pha_stas_rx_high32, sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[4], &vendor_host->ggc.dll_sela_after_mask, sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[5], &vendor_host->ggc.dll_selb_after_mask, sizeof(struct t_gg_reg_strt));
+
+	ret = get_gg_reg_cur(host, data, gg_reg_arr, 6);
+
+	if (ret == TRUE) {
+		selb_status_tx_low32 = gg_reg_arr[0].value;
+		pr_debug("BHT MSG:[205-236]:\n");
+		log_bin(selb_status_tx_low32);
+		selb_status_tx_high32 = gg_reg_arr[1].value;
+		pr_debug("BHT MSG:[237-268]:\n");
+		log_bin(selb_status_tx_high32);
+		selb_status_ggc_low32 = gg_reg_arr[2].value;
+		pr_debug("BHT MSG:[14-45]:\n");
+		log_bin(selb_status_ggc_low32);
+		selb_status_ggc_high32 = gg_reg_arr[3].value;
+		pr_debug("BHT MSG:[46-77]:\n");
+		log_bin(selb_status_ggc_high32);
+		pr_debug("BHT MSG:dll sela after mask=%xh\n", gg_reg_arr[4].value);
+		pr_debug("BHT MSG:dll selb after mask=%xh\n", gg_reg_arr[5].value);
+
+		if (raw_tx_selb) {
+			*raw_tx_selb = gg_reg_arr[1].value;
+			(*raw_tx_selb) <<= 32;
+			*raw_tx_selb += gg_reg_arr[0].value;
+			pr_debug("BHT MSG:raw_tx_selb:%llxh\n", *raw_tx_selb);
+		}
+
+		if (tx_selb) {
+			gen_array_data(gg_reg_arr[0].value, gg_reg_arr[1].value,
+				       tx_selb);
+			pr_debug("BHT MSG:tx_selb:%xh\n", *tx_selb);
+		}
+		if (all_selb) {
+			gen_array_data(gg_reg_arr[2].value, gg_reg_arr[3].value,
+				       all_selb);
+			pr_debug("BHT MSG:all_selb:%xh\n", *all_selb);
+		}
+	}
+
+	return ret;
+}
+
+static bool gg_tuning_result(struct sdhci_host *host, u32 *tx_selb, u32 *all_selb,
+			u64 *raw_tx_selb)
+{
+	host_cmddat_line_reset(host);
+	return sw_calc_tuning_result(host, tx_selb, all_selb, raw_tx_selb);
+}
+
+static u64 GENERATE_64_IDX_VALUE(int sft)
+{
+	u64 val = 1;
+
+	return val << sft;
+}
+
+static bool is_bus_mode_sdr104(struct sdhci_host *host)
+{
+	bool ret = FALSE;
+
+	if (host->timing == MMC_TIMING_UHS_SDR104)
+		ret = TRUE;
+
+	return ret;
+}
+
+static bool _check_bus_mode(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct ggc_platform_t *ggc = &vendor_host->ggc;
+
+	if (is_bus_mode_sdr104(host))
+		ggc->cur_bus_mode = &vendor_host->ggc.sdr104;
+	else
+		ggc->cur_bus_mode = &vendor_host->ggc.sdr50;
+
+	return true;
+}
+
+static void tx_selb_failed_history_update(struct sdhci_host *host, u32 val)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+
+	_check_bus_mode(host);
+
+	vendor_host->ggc.cur_bus_mode->tx_selb_failed_history &= val;
+}
+
+static u32 tx_selb_failed_history_get(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+
+	_check_bus_mode(host);
+
+	return vendor_host->ggc.cur_bus_mode->tx_selb_failed_history;
+}
+
+static void tx_selb_failed_tb_update(struct sdhci_host *host, int sela, u32 val)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+
+	_check_bus_mode(host);
+	vendor_host->ggc.cur_bus_mode->tx_selb_tb[sela] &= val;
+}
+
+static u32 tx_selb_failed_tb_get(struct sdhci_host *host, int sela)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	u32 value = 0;
+
+	_check_bus_mode(host);
+
+	if (is_bus_mode_sdr104(host))
+		value = vendor_host->ggc.sdr104.tx_selb_tb[sela];
+	else
+		value = vendor_host->ggc.sdr50.tx_selb_tb[sela];
+
+	return value;
+}
+
+static void all_selb_failed_tb_update(struct sdhci_host *host, int sela, u32 val)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+
+	_check_bus_mode(host);
+	vendor_host->ggc.cur_bus_mode->all_selb_tb[sela] &= val;
+}
+
+static u32 all_selb_failed_tb_get(struct sdhci_host *host, int sela)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	u32 val;
+
+	_check_bus_mode(host);
+
+	val = vendor_host->ggc.cur_bus_mode->all_selb_tb[sela];
+
+	return val;
+}
+
+static void chk_phase_window(u8 *tuning_win, u8 *mid_val, u8 *max_pass_win)
+{
+	u8 tuning_pass[TUNING_PHASE_SIZE + 32];
+	u8 tuning_pass_start[TUNING_PHASE_SIZE + 32];
+	u8 tuning_pass_num_max = 0;
+	u8 first_0 = 0;
+	u8 i = 0, j = 0;
+	u8 i_mode = 0, selb_mode = 0;
+
+	memset(tuning_pass, 1, sizeof(tuning_pass));
+	memset(tuning_pass_start, 1, sizeof(tuning_pass_start));
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		if (tuning_win[i] == 0) {
+			first_0 = i;
+			break;
+		}
+	}
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		i_mode = (first_0 + i) % TUNING_PHASE_SIZE;
+		if (tuning_win[i_mode] == 1)
+			tuning_pass[j]++;
+		else if (tuning_pass[j])
+			j++;
+		if (tuning_pass[j] == 1)
+			tuning_pass_start[j] = i_mode;
+	}
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		if (tuning_pass_num_max < tuning_pass[i]) {
+			tuning_pass_num_max = tuning_pass[i];
+			i_mode = i;
+		}
+	}
+
+	if (tuning_pass_num_max == 0)
+		pr_err
+		    ("Get max pass window fail, there is no any pass phase!!\n");
+	else {
+		*max_pass_win = tuning_pass_num_max - 1;
+		tuning_pass_num_max /= 2;
+		selb_mode = tuning_pass_start[i_mode] + tuning_pass_num_max;
+		if ((*max_pass_win % 2 == 0))
+			selb_mode += 1;
+		selb_mode %= TUNING_PHASE_SIZE;
+	}
+
+	*mid_val = selb_mode;
+}
+
+static void dump_array(u8 *tb)
+{
+	int i = 0;
+	u8 str[12] = { 0 };
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++)
+		str[i] = tb[i] + '0';
+}
+
+static void bits_generate_array(u8 *tb, u32 v)
+{
+	int i = 0;
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		if ((v & (1 << i)))
+			tb[i] = 1;
+		else
+			tb[i] = 0;
+	}
+	dump_array(tb);
+}
+
+static void chk_arr_max_win(u8 *tuning_win, u8 first_i, u8 *mid_val,
+				u8 *first_val, u8 *max_pass_win, struct chk_type_t type)
+{
+	u8 tuning_pass[TUNING_PHASE_SIZE];
+	u8 tuning_pass_start[TUNING_PHASE_SIZE];
+	u8 tuning_pass_num_max = 0;
+	u8 first_0 = 0;
+	u8 i = 0, j = 0;
+	u8 i_mode = 0, selb_mode = 0;
+
+	memset(tuning_pass, 1, sizeof(tuning_pass));
+	memset(tuning_pass_start, 1, sizeof(tuning_pass_start));
+
+	if (type.first_valid)
+		first_0 = first_i;
+	else {
+		for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+			if (tuning_win[i] == 0) {
+				first_0 = i;
+				break;
+			}
+		}
+	}
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		i_mode = (first_0 + i) % TUNING_PHASE_SIZE;
+		if (tuning_win[i_mode] == 1)
+			tuning_pass[j]++;
+		else if (tuning_pass[j])
+			j++;
+		if (tuning_pass[j] == 1)
+			tuning_pass_start[j] = i_mode;
+	}
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		if (tuning_pass_num_max < tuning_pass[i]) {
+			tuning_pass_num_max = tuning_pass[i];
+			i_mode = i;
+		}
+	}
+
+	if (tuning_pass_num_max == 0)
+		pr_err
+		    ("Get max pass window fail, there is no any pass phase!!\n");
+	else {
+		*max_pass_win = tuning_pass_num_max - 1;
+		tuning_pass_num_max /= 2;
+		if (first_val)
+			*first_val = tuning_pass_start[i_mode];
+		selb_mode = tuning_pass_start[i_mode] + tuning_pass_num_max;
+		if ((*max_pass_win % 2 == 0) && (type.right_valid)
+		    )
+			selb_mode += 1;
+		selb_mode %= TUNING_PHASE_SIZE;
+	}
+
+	*mid_val = selb_mode;
+}
+
+void no_fail_p(u8 *tuning_win, u8 *mid_val, u8 *max_pass_win, u8 *first_val)
+{
+	struct chk_type_t type;
+	u8 first_0 = 0;
+
+	memset((u8 *)&type, 0, sizeof(struct chk_type_t));
+
+	type.first_valid = 0;
+	type.right_valid = 1;
+	type.record_valid = 0;
+
+	chk_arr_max_win(tuning_win, first_0, mid_val, first_val,
+	max_pass_win, type);
+}
+
+static int ggc_get_selx_weight(u32 val)
+{
+	int i = 0;
+	int cnt = 0;
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		if (GET_IDX_VALUE(val, i))
+			cnt++;
+	}
+	return cnt;
+}
+
+void tx_selb_calculate_valid_phase_range(u32 val, int *start,
+						int *pass_cnt)
+{
+	int i = 0, flg = 0;
+
+	*pass_cnt = ggc_get_selx_weight(val);
+	for (i = 0; i < (TUNING_PHASE_SIZE * 2); i++) {
+		if ((GET_TRUNING_RING_IDX_VALUE(val, i)) == 0 && (flg == 0))
+			flg = 1;
+		if ((flg == 1) && GET_TRUNING_RING_IDX_VALUE(val, i)) {
+			*start = TRUNING_RING_IDX(i);
+			break;
+		}
+	}
+}
+
+bool ggc_update_default_selb_phase_tuning_cnt(struct sdhci_host *host, int selb,
+					      int tuning_cnt)
+{
+	struct t_gg_reg_strt gg_reg_arr[3];
+	u8 data[512];
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+
+	get_gg_reg_cur_val(&vendor_host->ggc, data, 64);
+
+	pr_debug("BHT MSG: selb:%xh,tuning_cnt:%xh\n", selb,
+		 tuning_cnt);
+	memcpy(&gg_reg_arr[0], &vendor_host->ggc.dll_selb_100m_cfg,
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[1], &vendor_host->ggc.dll_selb_200m_cfg,
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[2], &vendor_host->ggc.cmd19_cnt_cfg,
+		sizeof(struct t_gg_reg_strt));
+
+	gg_reg_arr[0].value = selb;
+	gg_reg_arr[1].value = selb;
+	gg_reg_arr[2].value = tuning_cnt;
+	chg_gg_reg_cur_val(&vendor_host->ggc, data, gg_reg_arr, 3, TRUE);
+
+	return TRUE;
+}
+
+static void _ggc_update_cur_setting_for_sw_selb_tuning(struct sdhci_host *host,
+						       u32 val)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	int start = 0, pass_cnt = 0;
+
+	tx_selb_calculate_valid_phase_range(val, &start, &pass_cnt);
+	pr_debug("BHT MSG:%s %x %x %x\n", __func__, val, start, pass_cnt);
+	ggc_update_default_selb_phase_tuning_cnt(host, start, pass_cnt);	//update
+	vendor_host->ggc.ggc_sw_selb_tuning_first_selb = start;
+}
+
+int sdhci_bht_sdr50_execute_tuning(struct sdhci_host *host, u32 opcode)
+{
+
+	u8 phase, *data_buf;
+	int size = 64;
+	int rc = 0;
+	struct mmc_host *mmc = host->mmc;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+
+	pr_debug("%s: Enter %s\n", mmc_hostname(mmc), __func__);
+
+	data_buf = kmalloc(size, GFP_KERNEL);
+
+	phase = 0;
+	do {
+		struct mmc_command cmd = { 0 };
+		struct mmc_data data = { 0 };
+		struct mmc_request mrq = {
+			.cmd = &cmd,
+			.data = &data
+		};
+		struct scatterlist sg;
+
+		cmd.opcode = opcode;
+		cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+
+		data.blksz = size;
+		data.blocks = 1;
+		data.flags = MMC_DATA_READ;
+		data.timeout_ns = 30 * 1000 * 1000;	/* 30ms */
+
+		data.sg = &sg;
+		data.sg_len = 1;
+		sg_init_one(&sg, data_buf, size);
+		memset(data_buf, 0, size);
+		host_cmddat_line_reset(host);
+		mmc_wait_for_req(mmc, &mrq);
+
+		if (cmd.error) {
+			if (cmd.error == -EILSEQ)
+				vendor_host->ggc.sdr50_notuning_crc_error_flag = 1;
+			if (cmd.error == -ETIMEDOUT && phase == 0) {
+				pr_err("BHT ERR:cmd19 timeout\n");
+				rc = -ETIMEDOUT;
+				goto kfree;
+			}
+		}
+
+		if (data.error) {
+			if (data.error == -EILSEQ)
+				vendor_host->ggc.sdr50_notuning_crc_error_flag = 1;
+		}
+	} while (++phase < 16);
+
+kfree:
+	kfree(data_buf);
+
+	return rc;
+}
+
+int get_config_sela_setting(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+
+	if (is_bus_mode_sdr104(host))
+		return vendor_host->ggc.def_sela_200m;
+	else
+		return vendor_host->ggc.def_sela_100m;
+}
+
+int get_config_selb_setting(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+
+	if (is_bus_mode_sdr104(host))
+		return vendor_host->ggc.def_selb_200m;
+	else
+		return vendor_host->ggc.def_selb_100m;
+}
+
+u32 get_all_sela_status(struct sdhci_host *host, u32 target_selb)
+{
+	u32 all_sela = 0;
+	u32 all_selb = 0;
+	int i = 0;
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		all_selb = all_selb_failed_tb_get(host, i);
+		if (all_selb & (1 << target_selb))
+			all_sela |= 1 << i;
+	}
+	return all_sela;
+}
+
+int get_pass_window_weight(u32 val)
+{
+	int i = 0;
+	int cnt = 0;
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		if (GET_IDX_VALUE(val, i))
+			cnt++;
+	}
+	return cnt;
+}
+
+int get_sela_nearby_pass_window(u32 sela, u32 base)
+{
+
+	int i = 0;
+	int idx = base;
+	int cnt = 0;
+
+	if (GET_IDX_VALUE(sela, idx) == 0)
+		return 0;
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		if (GET_IDX_VALUE(sela, idx)) {
+			idx++;
+			idx %= TUNING_PHASE_SIZE;
+		} else {
+			break;
+		}
+	}
+
+	if (idx == 0)
+		idx = 0xa;
+	else
+		idx--;
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		if (GET_IDX_VALUE(sela, idx)) {
+			cnt++;
+			if (idx == 0)
+				idx = 0xa;
+			else
+				idx--;
+		} else {
+			break;
+		}
+	}
+	return cnt;
+}
+
+int get_left_one_sel(int base)
+{
+	if (base == 0)
+		return 0xa;
+	else
+		return base - 1;
+}
+
+int get_right_one_sel(int base)
+{
+	if (base == 0xa)
+		return 0x0;
+	else
+		return base + 1;
+}
+
+int get_dif(int x, int y)
+{
+	int dif = 0;
+
+	if (y > x)
+		dif = y - x;
+	else
+		dif = x - y;
+
+	return dif;
+}
+
+static int update_selb(struct sdhci_host *host, int target_selb)
+{
+	return target_selb;
+}
+
+static int ggc_get_10case_0_index(u32 val)
+{
+	int i = 0;
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		if (GET_IDX_VALUE(val, i) == 0
+		    && GET_IDX_VALUE(val,
+				     TRUNING_RING_IDX(i + TUNING_PHASE_SIZE -
+						      1))) {
+			return i;
+		}
+	}
+
+	return -1;
+}
+
+static u32 ggc_get_01case_0_index(u32 val)
+{
+	int i = 0;
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		if (GET_IDX_VALUE(val, i) == 0
+		    && GET_IDX_VALUE(val, TRUNING_RING_IDX(i + 1))) {
+			return i;
+		}
+	}
+
+	return -1;
+}
+
+static int ggc_get_next_1_index(u32 val, int pos)
+{
+	int i = 0;
+
+	pos = pos % TUNING_PHASE_SIZE;
+	for (i = 0; i < TUNING_PHASE_SIZE; i++)	{
+		if (GET_IDX_VALUE(val, (pos+i)%TUNING_PHASE_SIZE))
+			break;
+	}
+	if (GET_IDX_VALUE(val, (pos+i)%TUNING_PHASE_SIZE))
+		return (pos+i)%TUNING_PHASE_SIZE;
+	else
+		return -1;
+}
+
+static u32 ggc_get_01case_1_index(u32 val)
+{
+	int i = 0;
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		if (GET_IDX_VALUE(val, i) == 0
+			&& GET_IDX_VALUE(val, TRUNING_RING_IDX(i + 1))) {
+			return TRUNING_RING_IDX(i + 1);
+		}
+	}
+
+	return -1;
+}
+
+static int ggc_get_first_0_index(u32 val)
+{
+	int i = 0;
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		if (GET_IDX_VALUE(val, i) == 0)
+			return i;
+	}
+	pr_debug("BHT MSG:oops-not find 0 index\n");
+	return 0;
+}
+
+static int _tx_selb_inject_policy(int tx_selb, int org_selb)
+{
+	int group_pos[TUNING_PHASE_SIZE+1][3];
+	int group_cnt = 0;
+	int max_len_group = 0;
+	int max_len = 0;
+	int i, j, cnt;
+	int zero_start, zero_end, sel;
+
+	if ((org_selb & BIT_PASS_MASK) != BIT_PASS_MASK) {
+		sel = tx_selb;
+		zero_start = ggc_get_10case_0_index(sel);
+		sel &=
+		    ~GENERATE_TRUNING_RING_IDX_VALUE(get_left_one_sel
+						     (zero_start));
+		zero_end = ggc_get_01case_0_index(sel);
+		sel &=
+		    ~GENERATE_TRUNING_RING_IDX_VALUE(get_right_one_sel
+						     (zero_end));
+		if (sel != (sel & tx_selb)) {
+			pr_err
+			    ("tx selb reinject exception case :not adjacent phase\n");
+			pr_err("BHT ERR:selb_failed range:%xh  ,new tx_selb:%x\n",
+			       org_selb, tx_selb);
+		}
+		org_selb &= tx_selb;
+	} else {
+		cnt = ggc_get_selx_weight(~tx_selb);
+		pr_debug("BHT MSG:%d\n", cnt);
+		switch (cnt) {
+		case 1:
+			i = ggc_get_first_0_index(tx_selb);
+			tx_selb &=
+			    ~GENERATE_TRUNING_RING_IDX_VALUE(get_right_one_sel
+							     (i));
+			tx_selb &=
+			    ~GENERATE_TRUNING_RING_IDX_VALUE(get_left_one_sel
+							     (i));
+
+			break;
+		case 2:
+			i = ggc_get_10case_0_index(tx_selb);
+			tx_selb &=
+			    ~GENERATE_TRUNING_RING_IDX_VALUE(get_left_one_sel
+							     (i));
+			i = ggc_get_01case_0_index(tx_selb);
+			tx_selb &=
+			    ~GENERATE_TRUNING_RING_IDX_VALUE(get_right_one_sel
+							     (i));
+			break;
+		default:
+			pr_debug("BHT MSG:>= 3 point case\n");
+		}
+		org_selb &= tx_selb;
+	}
+
+	pr_debug("BHT MSG:will check continuous 0bits: 0x%x\n", org_selb);
+
+	memset(group_pos, 0, sizeof(group_pos));
+	for (i = ggc_get_01case_1_index(org_selb);
+		i < TUNING_PHASE_SIZE && i >= 0 && group_cnt < TUNING_PHASE_SIZE;) {
+		for (j = 1; j < TUNING_PHASE_SIZE; j++)	{
+			if (GET_TRUNING_RING_IDX_VALUE(org_selb, i+j) != 0)
+				continue;
+			else
+				break;
+		}
+		group_pos[group_cnt][0] = i;
+		group_pos[group_cnt][1] = (i + j - 1) % TUNING_PHASE_SIZE;
+		group_pos[group_cnt][2] = j;
+		group_cnt++;
+		if (group_pos[group_cnt-1][0] > group_pos[group_cnt-1][1])
+			break;
+		i = ggc_get_next_1_index(org_selb, (i+j)%TUNING_PHASE_SIZE);
+		for (j = 0; j < group_cnt; j++)	{
+			if (i == group_pos[j][0])
+				break;
+		}
+		if (j < group_cnt)
+			break;
+	}
+
+	if (group_cnt > 1) {
+		pr_err("BHT ERR:After inject, selb 0x%x has %d continuous 0 bits\n",
+				org_selb, group_cnt);
+
+		for (i = 0; i < group_cnt; i++) {
+			if (max_len < group_pos[i][2]) {
+				max_len = group_pos[i][2];
+				max_len_group = i;
+			}
+		}
+		for (i = (group_pos[max_len_group][1] + 1) % TUNING_PHASE_SIZE;
+			i != group_pos[max_len_group][0]; i = (i+1)%TUNING_PHASE_SIZE) {
+			org_selb &= ~(1 << i);
+		}
+		pr_err("BHT ERR:After merge incontious 0 group, selb changed to 0x%x\n", org_selb);
+	} else if (group_cnt > 0) {
+		pr_err("BHT ERR:After merge incontious 0 group, selb = 0x%x\n", org_selb);
+	} else {
+		pr_err("BHT ERR:selb 0x%x has no bit is 0\n", org_selb);
+	}
+
+	return org_selb;
+}
+
+void tx_selb_inject_policy(struct sdhci_host *host, int tx_selb)
+{
+
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+
+	pr_debug("BHT MSG:before inject, failed ragen 0x%x, tx_selb 0x%x\n",
+			vendor_host->ggc.ggc_cmd_tx_selb_failed_range, tx_selb);
+	vendor_host->ggc.ggc_cmd_tx_selb_failed_range =
+		_tx_selb_inject_policy(tx_selb, vendor_host->ggc.ggc_cmd_tx_selb_failed_range);
+	tx_selb_failed_history_update(host, vendor_host->ggc.ggc_cmd_tx_selb_failed_range);
+	pr_debug("BHT MSG:after inject %xh range:%xh\n", tx_selb,
+		 vendor_host->ggc.ggc_cmd_tx_selb_failed_range);
+	if (is_bus_mode_sdr104(host))
+		vendor_host->ggc.sdr104.fail_phase = vendor_host->ggc.ggc_cmd_tx_selb_failed_range;
+	else
+		vendor_host->ggc.sdr50.fail_phase = vendor_host->ggc.ggc_cmd_tx_selb_failed_range;
+}
+
+int get_selb_failure_point(int start, u64 raw_tx_selb, int tuning_cnt)
+{
+	int last = start + (tuning_cnt - 1);
+	int i = 0;
+	int j = 0;
+	int phase = start;
+	int vct = BIT_PASS_MASK;
+
+	pr_debug("BHT MSG:%s start:%d tuning_cnt:%d\n", __func__, start,
+			 tuning_cnt);
+
+	for (i = 0; i < tuning_cnt; i++) {
+		if ((raw_tx_selb & GENERATE_64_IDX_VALUE(last - i)) == 0)
+			break;
+	}
+	if (i == tuning_cnt) {
+		phase = last % TUNING_PHASE_SIZE;
+		vct &= (~(1 << phase));
+		goto exit;
+	}
+
+	for (i = 0; i < tuning_cnt; i++) {
+		if ((raw_tx_selb & GENERATE_64_IDX_VALUE(last - i)) != 0)
+			break;
+	}
+	for (j = i - 2; j >= 0; j--)
+		raw_tx_selb |= (1 << (last - j));
+
+	for (j = 0; j < tuning_cnt; j++) {
+		if (0 == (raw_tx_selb & GENERATE_64_IDX_VALUE(last - j)))
+			vct &= (~(1 << (last-j)));
+	}
+
+exit:
+	pr_debug("BHT MSG:%s: after adjust raw_tx_selb: 0x%llx, vct 0x%x\n",
+			 __func__, raw_tx_selb, vct);
+
+	return vct;
+}
+
+bool selx_failure_point_exist(u32 val)
+{
+	return (val & BIT_PASS_MASK) != BIT_PASS_MASK;
+}
+
+static int _bits_vct_get_left_index(int base)
+{
+	return TRUNING_RING_IDX(base + TUNING_PHASE_SIZE - 1);
+}
+
+int _get_best_window_phase(u32 vct, int *pmax_pass_win, int shif_left_flg)
+{
+	u8 tuning_win[TUNING_PHASE_SIZE] = { 0 };
+	u8 tuning_pass[TUNING_PHASE_SIZE];
+	int tuning_pass_start[TUNING_PHASE_SIZE];
+	int tuning_pass_num_max = 0;
+	int first_0 = 0;
+	int i = 0, j = 0;
+	int i_mode = 0, selb_mode = 0;
+
+	memset(tuning_pass, 0, sizeof(tuning_pass));
+	memset(tuning_pass_start, 0, sizeof(tuning_pass_start));
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		if (GET_IDX_VALUE(vct, i))
+			tuning_win[i] = 1;
+		else
+			tuning_win[i] = 0;
+	}
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		if (tuning_win[i] == 0) {
+			first_0 = i;
+			break;
+		}
+	}
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		i_mode = TRUNING_RING_IDX(first_0 + i);
+		if (tuning_win[i_mode] == 1)
+			tuning_pass[j]++;
+		else if (tuning_pass[j])
+			j++;
+		if (tuning_pass[j] == 1)
+			tuning_pass_start[j] = i_mode;
+	}
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		if (tuning_pass_num_max < tuning_pass[i]) {
+			tuning_pass_num_max = tuning_pass[i];
+			i_mode = i;
+		}
+	}
+
+	if (tuning_pass_num_max == 0) {
+		pr_err("BHT ERR:###### Get max pass window fail, there is no any pass phase!!\n");
+		selb_mode = 0;
+	} else {
+		if (tuning_pass_num_max % 2)	{
+			selb_mode = tuning_pass_start[i_mode] + (tuning_pass_num_max - 1) / 2;
+		} else {
+			selb_mode = tuning_pass_start[i_mode] + (tuning_pass_num_max) / 2;
+			if (shif_left_flg) {
+				selb_mode = _bits_vct_get_left_index(selb_mode);
+				pr_debug("BHT MSG:shift left index\n");
+			}
+		}
+		selb_mode = TRUNING_RING_IDX(selb_mode);
+	}
+	if (pmax_pass_win)
+		*pmax_pass_win = tuning_pass_num_max;
+
+	return selb_mode;
+}
+
+
+int get_best_window_phase(u32 vct, int *pmax_pass_win)
+{
+	return _get_best_window_phase(vct, pmax_pass_win, 0);
+}
+
+static int _ggc_get_suitable_selb_for_next_tuning(struct sdhci_host *host)
+{
+	int selb = 0;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	u32 inj_tx_selb = BIT_PASS_MASK;
+
+	if (selx_failure_point_exist(vendor_host->ggc.ggc_cmd_tx_selb_failed_range)) {
+		selb = vendor_host->ggc.ggc_sw_selb_tuning_first_selb;
+	} else {
+		pr_debug("BHT MSG:manual inject for all pass case\n");
+		if (is_bus_mode_sdr104(host))
+			inj_tx_selb &= SDR104_MANUAL_INJECT;
+		else
+			inj_tx_selb &= SDR50_MANUAL_INJECT;
+
+		pr_debug("BHT MSG:manual inject for all pass case, inj_tx_selb=0x%x\n",
+				inj_tx_selb);
+		selb = get_best_window_phase(inj_tx_selb, NULL);
+		pr_debug("BHT MSG:select selb %d for all pass case\n", selb);
+	}
+	return selb;
+}
+
+static int ggc_get_tuning_cnt_from_buffer(struct sdhci_host *host)
+{
+	int cnt = 0;
+	u8 data[512];
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+
+	get_gg_reg_cur_val(&vendor_host->ggc, data, 64);
+	cnt = (int)cfg_read_bits_ofs_mask(data, &vendor_host->ggc.cmd19_cnt_cfg);
+
+	pr_debug("BHT MSG:tuning cnt=%d\n", cnt);
+	return cnt;
+}
+
+bool ggc_hw_inject_ext(struct sdhci_host *host, bool *card_status,
+			u32 sel200, u32 sel100, bool writetobh201)
+{
+	bool ret = TRUE;
+	u8 data[512];
+	struct t_gg_reg_strt gg_reg_arr[10];
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	u32 i = 0;
+	u32 reg;
+
+	pr_debug("BHT MSG:%s sel200:%xh,sel100:%xh\n", __func__, sel200, sel100);
+	get_gg_reg_cur_val(&vendor_host->ggc, data, 64);
+	memcpy(&gg_reg_arr[0], &vendor_host->ggc.inject_failure_for_tuning_enable_cfg,
+				sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[1], &vendor_host->ggc.inject_failure_for_200m_tuning_cfg,
+				sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[2], &vendor_host->ggc.inject_failure_for_100m_tuning_cfg,
+				sizeof(struct t_gg_reg_strt));
+	gg_reg_arr[0].value = 1;
+	gg_reg_arr[1].value = sel200;
+	gg_reg_arr[2].value = sel100;
+
+	chg_gg_reg_cur_val(&vendor_host->ggc, data, gg_reg_arr, 3, TRUE);
+	if (writetobh201)
+		ret = gg_emulator_write_ext(host, card_status, data, 512);
+	else {
+		pr_debug("BHT MSG:%s: dump config data instead write to bh201\n", __func__);
+		for (i = 0; i < 128; i++) {
+			memcpy(&reg, data+i*sizeof(u32), sizeof(u32));
+			pr_debug("BHT MSG:    ggc_reg32[%03d]=0x%08x\n", i, reg);
+		}
+	}
+	return ret;
+}
+
+bool _ggc_hw_inject_may_recursive(struct sdhci_host *host, u32 sel200,
+			u32 sel100, int max_recur, bool writetobh201)
+{
+	bool ret = TRUE, card_status = TRUE;
+	int selb = BIT_PASS_MASK;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+
+	ret = ggc_hw_inject_ext(host, &card_status, vendor_host->ggc.ggc_cmd_tx_selb_failed_range,
+			vendor_host->ggc.ggc_cmd_tx_selb_failed_range, writetobh201);
+	pr_debug("BHT MSG:ret:%x\n", ret);
+	if ((ret == FALSE) && (card_status == FALSE)) {
+		pr_debug("BHT MSG:inject again when hw inject\n");
+		selb &= ~GENERATE_IDX_VALUE(vendor_host->ggc.ggc_sw_selb_tuning_first_selb);
+		tx_selb_inject_policy(host, selb);
+		_ggc_update_cur_setting_for_sw_selb_tuning(host,
+			vendor_host->ggc.ggc_cmd_tx_selb_failed_range);
+
+		if (((11 - get_bit_number(vendor_host->ggc.ggc_cmd_tx_selb_failed_range)) >= 5)) {
+			pr_err("BHT ERR:pass windows too small,reinit recursive\n");
+			return FALSE;
+		}
+
+		if (max_recur--)
+			return _ggc_hw_inject_may_recursive(host,
+			vendor_host->ggc.ggc_cmd_tx_selb_failed_range,
+			vendor_host->ggc.ggc_cmd_tx_selb_failed_range, max_recur, writetobh201);
+		else
+			return FALSE;
+	} else
+		return TRUE;
+}
+
+bool ggc_hw_inject_may_recursive(struct sdhci_host *host, u32 sel200,
+			u32 sel100, bool writetobh201)
+{
+	return _ggc_hw_inject_may_recursive(host, sel200, sel100, 4, writetobh201);
+}
+
+bool get_next_dll_voltage(int cur, int *next, u32 *dll_voltage_unlock_cnt,
+			int *dll_voltage_scan_map)
+{
+	int min_idx = 0, cur_cnt = 0, next_cnt = 0;
+	int cur_flg = 0;
+	int i = 0;
+	u8 ret = 0;
+
+	pr_warn("BHT WARN:dll_voltage_unlock_cnt:%x %x %x %x\n",
+			dll_voltage_unlock_cnt[0], dll_voltage_unlock_cnt[1],
+			dll_voltage_unlock_cnt[2], dll_voltage_unlock_cnt[3]);
+	pr_warn("BHT WARN:dll_voltage_scan_map:%x %x %x %x\n",
+			dll_voltage_scan_map[0], dll_voltage_scan_map[1],
+			dll_voltage_scan_map[2], dll_voltage_scan_map[3]);
+	for (i = 1; i < 4; i++) {
+		if (cur_flg == 0) {
+			if (dll_voltage_scan_map[(cur + i) % 4] != 0)
+				continue;
+			cur_cnt = dll_voltage_unlock_cnt[(cur + i) % 4];
+			cur_flg = 1;
+			min_idx = (cur + i) % 4;
+			continue;
+		} else {
+			if (dll_voltage_scan_map[(cur + i) % 4] != 0)
+				continue;
+			next_cnt = dll_voltage_unlock_cnt[(cur + i) % 4];
+			if (cur_cnt > next_cnt) {
+				cur_cnt = next_cnt;
+				min_idx = (cur + i) % 4;
+			}
+		}
+	}
+	if (cur_flg == 0) {
+		pr_err("BHT ERR:no find available voltage\n");
+		ret = FALSE;
+	} else {
+		*next = min_idx;
+		pr_err("BHT ERR:next available voltage %d\n", min_idx);
+		ret = TRUE;
+	}
+	return ret;
+}
+
+bool ggc_sw_calc_tuning_result(struct sdhci_host *host, bool *card_status,
+			       bool *read_status, u32 *tx_selb, u32 *all_selb, u64 *raw_tx_selb)
+{
+	bool ret = FALSE;
+	bool card_ret = FALSE;
+	bool read_ret = FALSE;
+	u32 selb_status_tx_low32 = 0, selb_status_tx_high32 = 0;
+	u32 selb_status_ggc_low32 = 0, selb_status_ggc_high32 = 0;
+	struct t_gg_reg_strt gg_reg_arr[8] = {{0}};
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+
+	memcpy(&gg_reg_arr[0], &vendor_host->ggc.pha_stas_tx_low32,
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[1], &vendor_host->ggc.pha_stas_tx_high32,
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[2], &vendor_host->ggc.pha_stas_rx_low32,
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[3], &vendor_host->ggc.pha_stas_rx_high32,
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[4], &vendor_host->ggc.dll_sela_after_mask,
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[5], &vendor_host->ggc.dll_selb_after_mask,
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[6], &vendor_host->ggc.dll_delay_100m_backup,
+		sizeof(struct t_gg_reg_strt));
+	memcpy(&gg_reg_arr[7], &vendor_host->ggc.dll_delay_200m_backup,
+		sizeof(struct t_gg_reg_strt));
+
+	ret = ggc_read_registers_ext(host, &card_ret, &read_ret, gg_reg_arr, 8);
+	if (read_ret == TRUE) {
+		selb_status_tx_low32 = gg_reg_arr[0].value;
+		pr_debug("BHT MSG:[205-236]:\n");
+		log_bin(selb_status_tx_low32);
+		selb_status_tx_high32 = gg_reg_arr[1].value;
+		pr_debug("BHT MSG:[237-268]:\n");
+		log_bin(selb_status_tx_high32);
+		selb_status_ggc_low32 = gg_reg_arr[2].value;
+		pr_debug("BHT MSG:[14-45]:\n");
+		log_bin(selb_status_ggc_low32);
+		selb_status_ggc_high32 = gg_reg_arr[3].value;
+		pr_debug("BHT MSG:[46-77]:\n");
+		log_bin(selb_status_ggc_high32);
+		pr_debug("BHT MSG:dll  sela after mask=%xh", gg_reg_arr[4].value);
+		pr_debug("BHT MSG:dll  selb after mask=%xh", gg_reg_arr[5].value);
+
+		if (raw_tx_selb) {
+			*raw_tx_selb = gg_reg_arr[1].value;
+			(*raw_tx_selb) <<= 32;
+			*raw_tx_selb += gg_reg_arr[0].value;
+			pr_debug("BHT MSG:raw_tx_selb:%llxh\n", *raw_tx_selb);
+		}
+
+		if (tx_selb) {
+			gen_array_data(gg_reg_arr[0].value, gg_reg_arr[1].value,
+				       tx_selb);
+			pr_debug("BHT MSG:tx_selb:%xh\n", *tx_selb);
+		}
+		if (all_selb) {
+			gen_array_data(gg_reg_arr[2].value, gg_reg_arr[3].value,
+				       all_selb);
+			pr_debug("BHT MSG:all_selb:%xh\n", *all_selb);
+		}
+	}
+
+	if (read_status)
+		(*read_status) = read_ret;
+	if (card_status)
+		(*card_status) = card_ret;
+
+	if (card_status && read_status)
+		pr_debug("BHT MSG:card_status,read_status:%x %x\n", *card_status, *read_status);
+	return ret;
+}
+
+bool _ggc_calc_cur_sela_tuning_result(struct sdhci_host *host, int cur_sela, int start_selb)
+{
+	bool read_status = FALSE;
+	bool card_status = FALSE;
+	bool ret = TRUE;
+	u32 tx_selb, all_selb;
+	u64 raw_tx_selb = 0;
+	bool retuning_flg = FALSE;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	int selb;
+	struct ggc_platform_t *ggc = &vendor_host->ggc;
+	enum tuning_stat_et *psela_tuning_result = ggc->ggc_sela_tuning_result;
+
+	ret = ggc_sw_calc_tuning_result(host, &card_status,
+			&read_status, &tx_selb, &all_selb, &raw_tx_selb);
+
+	if (card_status == FALSE) {
+		if (read_status == TRUE) {
+			selb = get_selb_failure_point(start_selb, raw_tx_selb,
+					ggc_get_tuning_cnt_from_buffer(host));
+			pr_debug("BHT MSG:inject selb %03x for CMD7 read timeout\n", selb);
+			tx_selb_inject_policy(host, selb);
+		} else {
+			pr_debug("BHT MSG:%s dll:%xh read status failed\n",
+					__func__, cur_sela);
+		}
+		ret = FALSE;
+		goto exit;
+	} else {
+		if (read_status == TRUE) {
+			if (selx_failure_point_exist(tx_selb)) {
+				if ((11-get_bit_number(tx_selb)) <= 3) {
+					tx_selb_inject_policy(host, tx_selb);
+					all_selb_failed_tb_update(host, cur_sela, all_selb);
+					tx_selb_failed_tb_update(host, cur_sela, tx_selb);
+					tx_selb_failed_history_update(host, tx_selb);
+				} else if (get_bit_number(tx_selb) == 0) {
+					selb = get_selb_failure_point(start_selb, raw_tx_selb,
+							ggc_get_tuning_cnt_from_buffer(host));
+					tx_selb_inject_policy(host, selb);
+					all_selb_failed_tb_update(host, cur_sela, all_selb);
+					tx_selb_failed_tb_update(host, cur_sela, selb);
+					tx_selb_failed_history_update(host, selb);
+					retuning_flg = TRUE;
+				} else {
+					tx_selb_inject_policy(host, tx_selb);
+					all_selb_failed_tb_update(host, cur_sela, all_selb);
+					tx_selb_failed_tb_update(host, cur_sela, tx_selb);
+					tx_selb_failed_history_update(host, tx_selb);
+					retuning_flg = TRUE;
+				}
+
+				_ggc_update_cur_setting_for_sw_selb_tuning(host,
+						ggc->ggc_cmd_tx_selb_failed_range);
+				ggc_hw_inject_may_recursive(host, ggc->ggc_cmd_tx_selb_failed_range,
+						ggc->ggc_cmd_tx_selb_failed_range, TRUE);
+			} else {
+				all_selb_failed_tb_update(host, cur_sela, all_selb);
+				tx_selb_failed_tb_update(host, cur_sela, tx_selb);
+				tx_selb_failed_history_update(host, tx_selb);
+			}
+
+			if (retuning_flg == TRUE) {
+				pr_debug("BHT MSG: %s dll:%xh need retuning\n",
+						__func__, cur_sela);
+				psela_tuning_result[cur_sela] = RETUNING_CASE;
+			} else {
+				pr_debug("BHT MSG: %s dll:%xh pass\n",
+						__func__, cur_sela);
+				psela_tuning_result[cur_sela] = OUTPUT_PASS_TYPE;
+			}
+		} else {
+			psela_tuning_result[cur_sela] = READ_STATUS_FAIL_TYPE;
+			all_selb_failed_tb_update(host, cur_sela, 0);
+			pr_debug("BHT MSG:== %s dll:%xh read status failed ==\n",
+					__func__, cur_sela);
+		}
+	}
+exit:
+	return ret;
+}
+static int sdhci_bht_sdr104_execute_tuning(struct sdhci_host *host, u32 opcode)
+{
+	struct mmc_host *mmc = host->mmc;
+
+	return sdhci_msm_bayhub_execute_tuning(mmc, opcode);
+}
+
+static int sd_tuning_sw(struct sdhci_host *host)
+{
+	int ret = 0;
+
+	if (is_bus_mode_sdr104(host))
+		ret = sdhci_bht_sdr104_execute_tuning(host, 0x13);
+	else
+		ret = sdhci_bht_sdr50_execute_tuning(host, 0x13);
+
+	return ret;
+}
+
+static bool sd_gg_tuning_status(struct sdhci_host *host,
+			 u32 *tx_selb, u32 *all_selb, u64 *raw_tx_selb,
+			 bool *status_ret, bool *first_cmd19_status)
+{
+	bool ret = TRUE;
+	int err = sd_tuning_sw(host);
+
+	ret = err == 0 ? TRUE : FALSE;
+	if (err == -ETIMEDOUT) {
+		ret = FALSE;
+		if (first_cmd19_status)
+			*first_cmd19_status = false;
+		goto exit;
+	}
+
+	if (status_ret) {
+		*status_ret =
+			gg_tuning_result(host, tx_selb, all_selb,
+						raw_tx_selb);
+	} else {
+		gg_tuning_result(host, 0, 0, 0);
+	}
+
+exit:
+	return ret;
+}
+
+static bool ggc_sd_tuning(struct sdhci_host *host,
+			 bool *first_cmd19_status)
+{
+	bool ret = TRUE;
+	int err = sd_tuning_sw(host);
+
+	ret = err == 0 ? TRUE : FALSE;
+	if (err == -ETIMEDOUT) {
+		ret = FALSE;
+		if (first_cmd19_status)
+			*first_cmd19_status = false;
+		goto exit;
+	}
+
+exit:
+	return ret;
+}
+
+static bool _ggc_output_tuning(struct sdhci_host *host, u8 *selb_pass_win)
+{
+	int cur_sela = 0, dll_sela_cnt = 0;
+	int dll_sela_basis = 0;
+	bool ret = FALSE;
+	u8 win_tb[12] = { 0 };
+	u8 win_mid = 0;
+	u8 win_max = 0;
+	u32 tx_tmp = 0;
+	int target_sela = 0;
+	int target_selb = 0;
+	u32 all_sela, tx_selb, all_selb;
+	u64 raw_tx_selb;
+	bool status_ret = FALSE;
+	int cur_selb = 0;
+	int tuning_error_type[16] = { 0 };
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct ggc_platform_t *ggc = &vendor_host->ggc;
+	enum tuning_stat_et *psela_tuning_result = ggc->ggc_sela_tuning_result;
+	int i = 0;
+	u32 idx_r, idx_c;
+	u32 min_pos = 0;
+	u32 all_selb_ar[TUNING_PHASE_SIZE] = { 0 };
+	u32 pass_cnt[TUNING_PHASE_SIZE] = { 0 };
+	u32 cfg = 0;
+	int rescan_selb_cnt = 0;
+	int returning_selb_cnt = 0;
+	bool first_cmd19_sta = TRUE;
+	int next = 0;
+	bool card_status = TRUE;
+	int selb =	BIT_PASS_MASK;
+	u8 all_str[TUNING_PHASE_SIZE + 1], tx_str[TUNING_PHASE_SIZE + 1];
+
+	ggc->driver_strength_reinit_flg = 0;
+	vendor_host->ggc.dll_unlock_reinit_flg = 0;
+	dll_sela_basis = get_config_sela_setting(host);
+	cur_selb = get_config_selb_setting(host);
+
+	if (ggc->tuning_cmd7_timeout_reinit_flg) {
+		ggc->tuning_cmd7_timeout_reinit_flg = 0;
+		dll_sela_basis = vendor_host->ggc.ggc_cur_sela;
+		cur_selb = vendor_host->ggc.ggc_sw_selb_tuning_first_selb;
+		pr_debug
+		("BHT MSG:Tuning start sela: 0x%x, selb: 0x%x where CMD7 timeout\n",
+				dll_sela_basis, cur_selb);
+	}
+
+	for (dll_sela_cnt = 0; dll_sela_cnt < TUNING_PHASE_SIZE; dll_sela_cnt++) {
+		cur_sela =
+				(dll_sela_cnt + dll_sela_basis) % TUNING_PHASE_SIZE;
+		ggc->ggc_cur_sela = cur_sela;
+		pr_debug("BHT MSG: %s select sela dll: %x, selb dll: %x\n",
+				__func__, cur_sela, cur_selb);
+		if (psela_tuning_result[cur_sela] != NO_TUNING) {
+			pr_debug("BHT MSG:sela tuning=%d already tuning,so skip it\n", cur_sela);
+			continue;
+		}
+rescan_selb:
+		host_cmddat_line_reset(host);
+
+		if (dll_sela_cnt == 0) {
+			if (!selx_failure_point_exist
+					(vendor_host->ggc.ggc_cmd_tx_selb_failed_range)) {
+				rescan_selb_cnt = 3;
+				pr_debug("BHT MSG:no need rescan case\n");
+			}
+			status_ret = FALSE;
+			ret = ggc_sd_tuning(host, &first_cmd19_sta);
+
+			if (first_cmd19_sta == FALSE) {
+				_check_bus_mode(host);
+				ggc->cur_bus_mode->dll_voltage_unlock_cnt
+							[ggc->cur_dll_voltage_idx]++;
+				ggc->dll_voltage_scan_map[ggc->cur_dll_voltage_idx] = 1;
+				if (get_next_dll_voltage(ggc->cur_dll_voltage_idx, &next,
+					ggc->cur_bus_mode->dll_voltage_unlock_cnt,
+					ggc->dll_voltage_scan_map) == TRUE)
+					ggc->cur_dll_voltage_idx = next;
+				else
+					ggc->cur_dll_voltage_idx =
+							(ggc->cur_dll_voltage_idx + 1) % 4;
+
+				pr_err("BHT ERR:first cmd19 timeout\n");
+				vendor_host->ggc.dll_unlock_reinit_flg = 1;
+				_ggc_reset_tuning_result_for_dll(host);
+				ret = FALSE;
+				goto exit;
+			}
+		} else if ((is_bus_mode_sdr104(host) == FALSE)
+				&& vendor_host->ggc.sdr50_notuning_sela_inject_flag == 1
+				&& !GET_IDX_VALUE(vendor_host->ggc.sdr50_notuning_sela_rx_inject,
+				cur_sela)) {
+			pr_debug("BHT MSG:skip %d\n", cur_sela);
+			tuning_error_type[cur_sela] = READ_STATUS_FAIL_TYPE;
+			goto cur_sela_failed;
+		} else {
+			ret = ggc_set_output_tuning_phase_ext(host, &card_status,
+				cur_sela, update_selb(host, cur_selb));
+			if (ret == FALSE || card_status == FALSE) {
+				pr_err
+				("BHT ERR: output_tuning fail at phase %d,ret=%d,card_status=%d\n",
+						cur_sela, ret, card_status);
+				if (card_status == FALSE) {
+					selb &= ~GENERATE_IDX_VALUE(cur_selb);
+					pr_err("BHT ERR:inject selb %d for update sela/selb fail\n",
+							selb);
+					tx_selb_inject_policy(host, selb);
+					_ggc_update_cur_setting_for_sw_selb_tuning(host,
+						ggc->ggc_cmd_tx_selb_failed_range);
+					ggc_hw_inject_may_recursive(host,
+							ggc->ggc_cmd_tx_selb_failed_range,
+							ggc->ggc_cmd_tx_selb_failed_range, TRUE);
+
+					if (((11 - get_bit_number(
+						ggc->ggc_cmd_tx_selb_failed_range))	>= 5)) {
+						u8 current_ds = (u8)(ggc->_gg_reg_cur[15] >> 28);
+
+						pr_err("BHT ERR:pass windows too small\n");
+
+						ggc->driver_strength_reinit_flg  =
+						current_ds < 7 ? current_ds + 1 : 7;
+
+						ggc->_gg_reg_cur[15] &= 0x0F0FFFFF;
+						ggc->_gg_reg_cur[15] |=
+						(ggc->driver_strength_reinit_flg << 28)
+						| (ggc->driver_strength_reinit_flg << 20);
+						ret = FALSE;
+
+						goto exit;
+					}
+					cur_selb = _ggc_get_suitable_selb_for_next_tuning(host);
+				}
+				psela_tuning_result[cur_sela] = RETUNING_CASE;
+				goto retuning_case;
+			}
+			ret = ggc_sd_tuning(host, NULL);
+		}
+
+		if (ret == FALSE) {
+			pr_err("BHT ERR:Error when output_tuning, fail at phase %d\n",
+					cur_sela);
+			psela_tuning_result[cur_sela] = TUNING_FAIL_TYPE;
+			all_selb_failed_tb_update(host, cur_sela, 0);
+			continue;
+		}
+
+		ret = _ggc_calc_cur_sela_tuning_result(host, cur_sela, cur_selb);
+
+		if ((11 - get_bit_number(vendor_host->ggc.ggc_cmd_tx_selb_failed_range)) >= 5) {
+			u8 current_ds = (u8)(ggc->_gg_reg_cur[15] >> 28);
+
+			pr_err("BHT ERR:pass windows too small after result calculate, reinit\n");
+			if (current_ds < 7)
+				ggc->driver_strength_reinit_flg = current_ds + 1;
+			else
+				ggc->driver_strength_reinit_flg = 7;
+
+			ggc->_gg_reg_cur[15] &= 0x0F0FFFFF;
+			ggc->_gg_reg_cur[15] |=
+				(ggc->driver_strength_reinit_flg << 28)
+				| (ggc->driver_strength_reinit_flg << 20);
+			ret = FALSE;
+			pr_err("BHT ERR:will change driver strength from %d to %d\n",
+						 current_ds,
+						 ggc->driver_strength_reinit_flg);
+			goto exit;
+		}
+
+		if (ret == FALSE) {
+			pr_err("BHT ERR:cmd7 timeout fail,reinit\n");
+			vendor_host->ggc.tuning_cmd7_timeout_reinit_flg = 1;
+
+			_ggc_update_cur_setting_for_sw_selb_tuning(host,
+							ggc->ggc_cmd_tx_selb_failed_range);
+			ggc_hw_inject_may_recursive(host, ggc->ggc_cmd_tx_selb_failed_range,
+							ggc->ggc_cmd_tx_selb_failed_range, FALSE);
+			if ((11 - get_bit_number(vendor_host->ggc.ggc_cmd_tx_selb_failed_range))
+										>= 5) {
+				u8 current_ds = (u8)(ggc->_gg_reg_cur[15] >> 28);
+
+				pr_err("BHT ERR:pass windows too small, driver strength reinit\n");
+
+				vendor_host->ggc.tuning_cmd7_timeout_reinit_flg = 0;
+
+				ggc->driver_strength_reinit_flg  =
+						current_ds < 7 ? current_ds + 1 : 7;
+
+				ggc->_gg_reg_cur[15] &= 0x0F0FFFFF;
+				ggc->_gg_reg_cur[15] |=
+					(ggc->driver_strength_reinit_flg << 28)
+					| (ggc->driver_strength_reinit_flg << 20);
+				ret = FALSE;
+				pr_err("BHT ERR:will change driver strength from %d to %d\n",
+						current_ds,
+						ggc->driver_strength_reinit_flg);
+				goto exit;
+			}
+			goto exit;
+		}
+
+		cur_selb = _ggc_get_suitable_selb_for_next_tuning(host);
+
+		pr_debug("BHT MSG: output sela:%xh pass\n", cur_sela);
+		rescan_selb_cnt++;
+		if ((rescan_selb_cnt < 3) &&
+			(selx_failure_point_exist(vendor_host->ggc.ggc_cmd_tx_selb_failed_range))) {
+			pr_debug("BHT MSG:rescan cnt %d, ggc_cmd_tx_selb_failed_range=0x%x\n",
+						rescan_selb_cnt,
+						vendor_host->ggc.ggc_cmd_tx_selb_failed_range);
+			goto rescan_selb;
+		}
+
+retuning_case:
+		if (psela_tuning_result[cur_sela] == RETUNING_CASE) {
+			returning_selb_cnt++;
+			if (returning_selb_cnt < 3) {
+				rescan_selb_cnt = 0;
+				pr_debug("BHT MSG:retuning %d\n", rescan_selb_cnt);
+				goto rescan_selb;
+			} else {
+				psela_tuning_result[cur_sela] = SET_PHASE_FAIL_TYPE;
+				all_selb_failed_tb_update(host, cur_sela, 0);
+				continue;
+			}
+		}
+
+		goto next_dll_sela;
+
+cur_sela_failed:
+		pr_debug("BHT MSG:read status failedB\n");
+		all_selb = 0;
+		all_selb_failed_tb_update(host, cur_sela, all_selb);
+		pr_debug("BHT MSG: output sela:%xh failed ===\n", cur_sela);
+next_dll_sela:
+		if ((is_bus_mode_sdr104(host) == FALSE)
+				&& vendor_host->ggc.sdr50_notuning_crc_error_flag) {
+			u32 fp = 0;
+
+			fp = GENERATE_IDX_VALUE(cur_sela);
+			fp |= GENERATE_IDX_VALUE((cur_sela + 1) % TUNING_PHASE_SIZE);
+			fp |= GENERATE_IDX_VALUE((cur_sela + 10) % TUNING_PHASE_SIZE);
+			vendor_host->ggc.sdr50_notuning_sela_rx_inject &= ~fp;
+			vendor_host->ggc.sdr50_notuning_sela_inject_flag = 1;
+			pr_debug("BHT MSG:sdr50_notuning_sela_rx_inject:%x\n",
+						vendor_host->ggc.sdr50_notuning_sela_rx_inject);
+			ret = FALSE;
+			goto exit;
+		};
+	}
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		phase_str(all_str, all_selb_failed_tb_get(host, i));
+		phase_str(tx_str, tx_selb_failed_tb_get(host, i));
+		pr_debug
+				("BHT MSG:DLL sela[%x]  all selb: %s   tx selb: %s [%xh,%xh] %s\n",
+					i, all_str, tx_str,
+					all_selb_failed_tb_get(host, i),
+					tx_selb_failed_tb_get(host, i),
+					op_dbg_str[tuning_error_type[i]]);
+
+	}
+
+	/* remove margin passed all selb phase */
+	for (i = 0; i < TUNING_PHASE_SIZE; i++)
+		all_selb_ar[i] = all_selb_failed_tb_get(host, i);
+
+	/* calculate cumulation of diagonal bits */
+	for (idx_c = 0; idx_c < TUNING_PHASE_SIZE; idx_c++) {
+		for (idx_r = 0; idx_r < TUNING_PHASE_SIZE;
+					idx_r++) {
+			pass_cnt[idx_c] +=	((all_selb_ar[idx_r] >>
+					((idx_r + idx_c) % TUNING_PHASE_SIZE)) & 0x01);
+		}
+		if (idx_c == 0)
+			min_pos = 0;
+		else if (pass_cnt[idx_c] < pass_cnt[min_pos])
+			min_pos = idx_c;
+	}
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		all_selb_ar[i] &= ~(1 << (min_pos + i) % TUNING_PHASE_SIZE);
+		all_selb_failed_tb_update(host, i, all_selb_ar[i]);
+	}
+
+	tx_selb = tx_selb_failed_history_get(host);
+
+	pr_debug("inject sw selb & merge tx_selb failed point to all_selb\n");
+	for (i = 0; i < TUNING_PHASE_SIZE; i++)
+		all_selb_failed_tb_update(host, i, tx_selb);
+
+	pr_debug("BHT MSG:inject sw sela failed point to all_selb\n");
+	if (is_bus_mode_sdr104(host))
+		cfg = 0x7ff;
+	else
+		cfg = 0x7ff;
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		if (GET_IDX_VALUE(cfg, i) == 0)
+			all_selb_failed_tb_update(host, i, 0);
+	}
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		phase_str(all_str, all_selb_failed_tb_get(host, i));
+		phase_str(tx_str, tx_selb_failed_tb_get(host, i));
+		pr_debug("BHT MSG:DLL sela[%x]  all selb: %s tx selb: %s [%xh,%xh] %s\n",
+				i, all_str, tx_str,
+				all_selb_failed_tb_get(host, i),
+				tx_selb_failed_tb_get(host, i),
+				op_dbg_str[tuning_error_type[i]]);
+	}
+
+	tx_selb = tx_selb_failed_history_get(host);
+	tx_selb &= 0x7ff;
+	tx_tmp = tx_selb;
+
+	pr_debug("BHT MSG:---selb merge---\n");
+	if ((tx_selb&0x7ff) == 0x7ff) {
+		if (is_bus_mode_sdr104(host)) {
+			u32 cfg = SDR104_MANUAL_INJECT;
+
+			tx_selb &= cfg;
+			pr_debug("tx selb:%xh SDR104 inject:%xh merge tx_selb:%xh\n",
+						tx_tmp, cfg, tx_selb);
+		} else {
+			u32 cfg = SDR50_MANUAL_INJECT;
+
+			tx_selb &= cfg;
+			pr_debug("tx selb:%xh SDR50 inject:%xh merge tx_selb:%xh\n",
+						tx_tmp, cfg, tx_selb);
+		}
+	}
+
+	if (tx_selb == 0) {
+		pr_err("all failed, force fixed phase sela selb to default\n");
+		target_selb =
+				get_config_selb_setting(host);
+		target_sela =
+				get_config_sela_setting(host);
+		goto final;
+	}
+	phase_str(win_tb, tx_selb);
+	pr_debug("BHT MSG: tx selb[%xh] 11 bit: %s\n",
+						tx_selb, win_tb);
+	bits_generate_array(win_tb, tx_selb);
+	chk_phase_window(win_tb, &win_mid, &win_max);
+	target_selb = win_mid;
+
+	all_sela = 0;
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++) {
+		u32 all_selb = all_selb_failed_tb_get(host, i);
+
+		phase_str(win_tb, all_selb);
+		pr_debug("BHT MSG: all_selb[%xh] 11 bit: %s\n",
+				all_selb, win_tb);
+		bits_generate_array(win_tb, all_selb);
+		chk_phase_window(win_tb, &win_mid,
+					&win_max);
+		*selb_pass_win = win_max;
+		if (all_selb & (1 << target_selb))
+			all_sela |= 1 << i;
+	}
+
+	phase_str(win_tb, all_sela);
+	pr_debug("BHT MSG: all_sela[%xh] 11 bit: %s\n",
+			all_sela, win_tb);
+	bits_generate_array(win_tb, all_sela);
+	chk_phase_window(win_tb, &win_mid, &win_max);
+	target_sela = win_mid;
+
+final:
+
+	gg_fix_output_tuning_phase(host, target_sela,
+						target_selb);
+
+	ret = sd_gg_tuning_status(host, &tx_selb,
+			&all_selb, &raw_tx_selb, &status_ret, NULL);
+	if (ret == FALSE) {
+		pr_err("Error when output_tuning,  sd_tuning fail\n");
+		ret = FALSE;
+		goto exit;
+	}
+
+	/* use final pass windows */
+	phase_str(win_tb, all_selb);
+	pr_debug("BHT MSG: all_selb[%xh] 11 bit: %s\n",
+			all_selb, win_tb);
+	bits_generate_array(win_tb, all_selb);
+	chk_phase_window(win_tb, &win_mid, &win_max);
+	*selb_pass_win = win_max;
+
+	vendor_host->ggc.selx_tuning_done_flag = 1;
+
+exit:
+	pr_debug("BHT MSG:exit:%s  %d\n", __func__, ret);
+	return ret;
+}
+
+static int sdhci_bht_execute_tuning(struct mmc_host *mmc, u32 opcode)
+{
+	struct sdhci_host *host = mmc_priv(mmc);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	u8 tw = 0;
+	int ret = 0;
+
+	if (vendor_host->ggc.bh201_used) {
+		pr_debug("BHT MSG:enter bht tuning\n");
+		if (host->clock < CORE_FREQ_100MHZ) {
+			pr_debug("BHT MSG:%d less 100Mhz,no tuning\n", host->clock);
+			return 0;
+		}
+
+		if (vendor_host->ggc.tuning_in_progress) {
+			pr_debug("BHT MSG:tuning_in_progress\n");
+			return 0;
+		}
+		vendor_host->ggc.tuning_in_progress = true;
+
+		if (vendor_host->ggc.selx_tuning_done_flag) {
+			pr_debug("BHT MSG:GGC tuning is done, just do vendor host tuning");
+			if (is_bus_mode_sdr104(host))
+				ret = sdhci_bht_sdr104_execute_tuning(host, 0x13);
+			else
+				ret = sdhci_bht_sdr50_execute_tuning(host, 0x13);
+		} else {
+			ret = !_ggc_output_tuning(host, &tw);
+		}
+		vendor_host->ggc.tuning_in_progress = false;
+		return ret;
+	} else
+		return sdhci_msm_bayhub_execute_tuning(vendor_host->mmc, opcode);
+}
+
+/*
+ * sdhci_msm_bayhub_hs400 - Calibrate the DLL for HS400 bus speed mode operation.
+ * This needs to be done for both tuning and enhanced_strobe mode.
+ * DLL operation is only needed for clock > 100MHz. For clock <= 100MHz
+ * fixed feedback clock is used.
+ */
+static void sdhci_msm_bayhub_hs400(struct sdhci_host *host, struct mmc_ios *ios)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	int ret;
+
+	if (host->clock > CORE_FREQ_100MHZ &&
+	    (msm_bayhub_host->tuning_done || ios->enhanced_strobe) &&
+	    !msm_bayhub_host->calibration_done) {
+		ret = sdhci_msm_bayhub_hs400_dll_calibration(host);
+		if (!ret)
+			msm_bayhub_host->calibration_done = true;
+		else
+			pr_err("%s: Failed to calibrate DLL for hs400 mode (%d)\n",
+			       mmc_hostname(host->mmc), ret);
+	}
+}
+
+static void sdhci_msm_bayhub_set_uhs_signaling(struct sdhci_host *host,
+					unsigned int uhs)
+{
+	struct mmc_host *mmc = host->mmc;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	u16 ctrl_2;
+	u32 config;
+	const struct sdhci_msm_bayhub_offset *msm_bayhub_offset =
+					msm_bayhub_host->offset;
+
+	ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+	/* Select Bus Speed Mode for host */
+	ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
+	switch (uhs) {
+	case MMC_TIMING_UHS_SDR12:
+		ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
+		break;
+	case MMC_TIMING_UHS_SDR25:
+		ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
+		break;
+	case MMC_TIMING_UHS_SDR50:
+		ctrl_2 |= SDHCI_CTRL_UHS_SDR50;
+		break;
+	case MMC_TIMING_MMC_HS400:
+	case MMC_TIMING_MMC_HS200:
+	case MMC_TIMING_UHS_SDR104:
+		ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
+		break;
+	case MMC_TIMING_UHS_DDR50:
+	case MMC_TIMING_MMC_DDR52:
+		ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
+		break;
+	}
+
+	/*
+	 * When clock frequency is less than 100MHz, the feedback clock must be
+	 * provided and DLL must not be used so that tuning can be skipped. To
+	 * provide feedback clock, the mode selection can be any value less
+	 * than 3'b011 in bits [2:0] of HOST CONTROL2 register.
+	 */
+	if (host->clock <= CORE_FREQ_100MHZ) {
+		if (uhs == MMC_TIMING_MMC_HS400 ||
+		    uhs == MMC_TIMING_MMC_HS200 ||
+		    uhs == MMC_TIMING_UHS_SDR104)
+			ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
+		/*
+		 * DLL is not required for clock <= 100MHz
+		 * Thus, make sure DLL it is disabled when not required
+		 */
+		config = readl_relaxed(host->ioaddr +
+				msm_bayhub_offset->core_dll_config);
+		config |= CORE_DLL_RST;
+		writel_relaxed(config, host->ioaddr +
+				msm_bayhub_offset->core_dll_config);
+
+		config = readl_relaxed(host->ioaddr +
+				msm_bayhub_offset->core_dll_config);
+		config |= CORE_DLL_PDN;
+		writel_relaxed(config, host->ioaddr +
+				msm_bayhub_offset->core_dll_config);
+
+		/*
+		 * The DLL needs to be restored and CDCLP533 recalibrated
+		 * when the clock frequency is set back to 400MHz.
+		 */
+		msm_bayhub_host->calibration_done = false;
+	}
+
+	dev_dbg(mmc_dev(mmc), "%s: clock=%u uhs=%u ctrl_2=0x%x\n",
+		mmc_hostname(host->mmc), host->clock, uhs, ctrl_2);
+	sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
+
+	if (mmc->ios.timing == MMC_TIMING_MMC_HS400)
+		sdhci_msm_bayhub_hs400(host, &mmc->ios);
+}
+
+static int sdhci_msm_bayhub_set_pincfg(struct sdhci_msm_bayhub_host *msm_bayhub_host, bool level)
+{
+	struct platform_device *pdev = msm_bayhub_host->pdev;
+	int ret;
+
+	if (level)
+		ret = pinctrl_pm_select_default_state(&pdev->dev);
+	else
+		ret = pinctrl_pm_select_sleep_state(&pdev->dev);
+
+	return ret;
+}
+
+static int sdhci_msm_bayhub_set_vmmc(struct mmc_host *mmc)
+{
+	if (IS_ERR(mmc->supply.vmmc))
+		return 0;
+
+	return mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, mmc->ios.vdd);
+}
+
+static int msm_bayhub_toggle_vqmmc(struct sdhci_msm_bayhub_host *msm_bayhub_host,
+			      struct mmc_host *mmc, bool level)
+{
+	int ret;
+	struct mmc_ios ios;
+
+	if (msm_bayhub_host->vqmmc_enabled == level)
+		return 0;
+
+	if (level) {
+		/* Set the IO voltage regulator to default voltage level */
+		if (msm_bayhub_host->caps_0 & CORE_3_0V_SUPPORT)
+			ios.signal_voltage = MMC_SIGNAL_VOLTAGE_330;
+		else if (msm_bayhub_host->caps_0 & CORE_1_8V_SUPPORT)
+			ios.signal_voltage = MMC_SIGNAL_VOLTAGE_180;
+
+		if (msm_bayhub_host->caps_0 & CORE_VOLT_SUPPORT) {
+			ret = mmc_regulator_set_vqmmc(mmc, &ios);
+			if (ret < 0) {
+				dev_err(mmc_dev(mmc), "%s: vqmmc set volgate failed: %d\n",
+					mmc_hostname(mmc), ret);
+				goto out;
+			}
+		}
+		ret = regulator_enable(mmc->supply.vqmmc);
+	} else {
+		ret = regulator_disable(mmc->supply.vqmmc);
+	}
+
+	if (ret)
+		dev_err(mmc_dev(mmc), "%s: vqmm %sable failed: %d\n",
+			mmc_hostname(mmc), level ? "en":"dis", ret);
+	else
+		msm_bayhub_host->vqmmc_enabled = level;
+out:
+	return ret;
+}
+
+static int msm_bayhub_config_vqmmc_mode(struct sdhci_msm_bayhub_host *msm_bayhub_host,
+			      struct mmc_host *mmc, bool hpm)
+{
+	int load, ret;
+
+	load = hpm ? MMC_VQMMC_MAX_LOAD_UA : 0;
+	ret = regulator_set_load(mmc->supply.vqmmc, load);
+	if (ret)
+		dev_err(mmc_dev(mmc), "%s: vqmmc set load failed: %d\n",
+			mmc_hostname(mmc), ret);
+	return ret;
+}
+
+static int sdhci_msm_bayhub_set_vqmmc(struct sdhci_msm_bayhub_host *msm_bayhub_host,
+			      struct mmc_host *mmc, bool level)
+{
+	int ret;
+	bool always_on;
+
+	if (IS_ERR(mmc->supply.vqmmc) ||
+			(mmc->ios.power_mode == MMC_POWER_UNDEFINED))
+		return 0;
+	/*
+	 * For eMMC don't turn off Vqmmc, Instead just configure it in LPM
+	 * and HPM modes by setting the corresponding load.
+	 *
+	 * Till eMMC is initialized (i.e. always_on == 0), just turn on/off
+	 * Vqmmc. Vqmmc gets turned off only if init fails and mmc_power_off
+	 * gets invoked. Once eMMC is initialized (i.e. always_on == 1),
+	 * Vqmmc should remain ON, So just set the load instead of turning it
+	 * off/on.
+	 */
+	always_on = !mmc_card_is_removable(mmc) &&
+			mmc->card && mmc_card_mmc(mmc->card);
+
+	if (always_on)
+		ret = msm_bayhub_config_vqmmc_mode(msm_bayhub_host, mmc, level);
+	else
+		ret = msm_bayhub_toggle_vqmmc(msm_bayhub_host, mmc, level);
+
+	return ret;
+}
+
+static inline void sdhci_msm_bayhub_init_pwr_irq_wait(struct sdhci_msm_bayhub_host *msm_bayhub_host)
+{
+	init_waitqueue_head(&msm_bayhub_host->pwr_irq_wait);
+}
+
+static inline void sdhci_msm_bayhub_complete_pwr_irq_wait(
+		struct sdhci_msm_bayhub_host *msm_bayhub_host)
+{
+	wake_up(&msm_bayhub_host->pwr_irq_wait);
+}
+
+/*
+ * sdhci_msm_bayhub_check_power_status API should be called when registers writes
+ * which can toggle sdhci IO bus ON/OFF or change IO lines HIGH/LOW happens.
+ * To what state the register writes will change the IO lines should be passed
+ * as the argument req_type. This API will check whether the IO line's state
+ * is already the expected state and will wait for power irq only if
+ * power irq is expected to be triggered based on the current IO line state
+ * and expected IO line state.
+ */
+static void sdhci_msm_bayhub_check_power_status(struct sdhci_host *host, u32 req_type)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	bool done = false;
+	u32 val = SWITCHABLE_SIGNALING_VOLTAGE;
+	const struct sdhci_msm_bayhub_offset *msm_bayhub_offset =
+					msm_bayhub_host->offset;
+
+	pr_debug("%s: %s: request %d curr_pwr_state %x curr_io_level %x\n",
+			mmc_hostname(host->mmc), __func__, req_type,
+			msm_bayhub_host->curr_pwr_state, msm_bayhub_host->curr_io_level);
+
+	/*
+	 * The power interrupt will not be generated for signal voltage
+	 * switches if SWITCHABLE_SIGNALING_VOLTAGE in MCI_GENERICS is not set.
+	 * Since sdhci-msm_bayhub-v5, this bit has been removed and SW must consider
+	 * it as always set.
+	 */
+	if (!msm_bayhub_host->mci_removed)
+		val = msm_bayhub_host_readl(msm_bayhub_host, host,
+				msm_bayhub_offset->core_generics);
+	if ((req_type & REQ_IO_HIGH || req_type & REQ_IO_LOW) &&
+	    !(val & SWITCHABLE_SIGNALING_VOLTAGE)) {
+		return;
+	}
+
+	/*
+	 * The IRQ for request type IO High/LOW will be generated when -
+	 * there is a state change in 1.8V enable bit (bit 3) of
+	 * SDHCI_HOST_CONTROL2 register. The reset state of that bit is 0
+	 * which indicates 3.3V IO voltage. So, when MMC core layer tries
+	 * to set it to 3.3V before card detection happens, the
+	 * IRQ doesn't get triggered as there is no state change in this bit.
+	 * The driver already handles this case by changing the IO voltage
+	 * level to high as part of controller power up sequence. Hence, check
+	 * for host->pwr to handle a case where IO voltage high request is
+	 * issued even before controller power up.
+	 */
+	if ((req_type & REQ_IO_HIGH) && !host->pwr) {
+		pr_debug("%s: do not wait for power IRQ that never comes, req_type: %d\n",
+				mmc_hostname(host->mmc), req_type);
+		return;
+	}
+	if ((req_type & msm_bayhub_host->curr_pwr_state) ||
+			(req_type & msm_bayhub_host->curr_io_level))
+		done = true;
+	/*
+	 * This is needed here to handle cases where register writes will
+	 * not change the current bus state or io level of the controller.
+	 * In this case, no power irq will be triggerred and we should
+	 * not wait.
+	 */
+	if (!done) {
+		if (!wait_event_timeout(msm_bayhub_host->pwr_irq_wait,
+				msm_bayhub_host->pwr_irq_flag,
+				msecs_to_jiffies(MSM_PWR_IRQ_TIMEOUT_MS)))
+			dev_warn(&msm_bayhub_host->pdev->dev,
+				 "%s: pwr_irq for req: (%d) timed out\n",
+				 mmc_hostname(host->mmc), req_type);
+	}
+	pr_debug("%s: %s: request %d done\n", mmc_hostname(host->mmc),
+			__func__, req_type);
+}
+
+static void sdhci_msm_bayhub_dump_pwr_ctrl_regs(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	const struct sdhci_msm_bayhub_offset *msm_bayhub_offset =
+					msm_bayhub_host->offset;
+
+	pr_err("%s: PWRCTL_STATUS: 0x%08x | PWRCTL_MASK: 0x%08x | PWRCTL_CTL: 0x%08x\n",
+		mmc_hostname(host->mmc),
+		msm_bayhub_host_readl(msm_bayhub_host, host, msm_bayhub_offset->core_pwrctl_status),
+		msm_bayhub_host_readl(msm_bayhub_host, host, msm_bayhub_offset->core_pwrctl_mask),
+		msm_bayhub_host_readl(msm_bayhub_host, host, msm_bayhub_offset->core_pwrctl_ctl));
+}
+
+static void sdhci_msm_bayhub_handle_pwr_irq(struct sdhci_host *host, int irq)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	struct mmc_host *mmc = host->mmc;
+	u32 irq_status, irq_ack = 0;
+	int retry = 10, ret;
+	u32 pwr_state = 0, io_level = 0;
+	u32 config;
+	const struct sdhci_msm_bayhub_offset *msm_bayhub_offset = msm_bayhub_host->offset;
+
+	irq_status = msm_bayhub_host_readl(msm_bayhub_host, host,
+			msm_bayhub_offset->core_pwrctl_status);
+	irq_status &= INT_MASK;
+
+	msm_bayhub_host_writel(msm_bayhub_host, irq_status, host,
+			msm_bayhub_offset->core_pwrctl_clear);
+
+	/*
+	 * There is a rare HW scenario where the first clear pulse could be
+	 * lost when actual reset and clear/read of status register is
+	 * happening at a time. Hence, retry for at least 10 times to make
+	 * sure status register is cleared. Otherwise, this will result in
+	 * a spurious power IRQ resulting in system instability.
+	 */
+	while (irq_status & msm_bayhub_host_readl(msm_bayhub_host, host,
+				msm_bayhub_offset->core_pwrctl_status)) {
+		if (retry == 0) {
+			pr_err("%s: Timedout clearing (0x%x) pwrctl status register\n",
+					mmc_hostname(host->mmc), irq_status);
+			sdhci_msm_bayhub_dump_pwr_ctrl_regs(host);
+			WARN_ON(1);
+			break;
+		}
+		msm_bayhub_host_writel(msm_bayhub_host, irq_status, host,
+			msm_bayhub_offset->core_pwrctl_clear);
+		retry--;
+		udelay(10);
+	}
+
+	/* Handle BUS ON/OFF*/
+	if (irq_status & CORE_PWRCTL_BUS_ON) {
+		if (msm_bayhub_host->ggc.bh201_used)
+			bh201_signal_voltage_on_off(host, 1);
+		pwr_state = REQ_BUS_ON;
+		io_level = REQ_IO_HIGH;
+	}
+	if (irq_status & CORE_PWRCTL_BUS_OFF) {
+		if (msm_bayhub_host->ggc.bh201_used)
+			bh201_signal_voltage_on_off(host, 0);
+		pwr_state = REQ_BUS_OFF;
+		io_level = REQ_IO_LOW;
+	}
+
+	if (pwr_state) {
+		ret = sdhci_msm_bayhub_set_vmmc(mmc);
+		if (!ret)
+			ret = sdhci_msm_bayhub_set_vqmmc(msm_bayhub_host, mmc,
+					pwr_state & REQ_BUS_ON);
+		if (!ret)
+			ret = sdhci_msm_bayhub_set_pincfg(msm_bayhub_host,
+					pwr_state & REQ_BUS_ON);
+		if (!ret)
+			irq_ack |= CORE_PWRCTL_BUS_SUCCESS;
+		else
+			irq_ack |= CORE_PWRCTL_BUS_FAIL;
+	}
+
+	/* Handle IO LOW/HIGH */
+	if (irq_status & CORE_PWRCTL_IO_LOW)
+		io_level = REQ_IO_LOW;
+
+	if (irq_status & CORE_PWRCTL_IO_HIGH)
+		io_level = REQ_IO_HIGH;
+
+	if (io_level)
+		irq_ack |= CORE_PWRCTL_IO_SUCCESS;
+
+	if (io_level && !IS_ERR(mmc->supply.vqmmc) && !pwr_state) {
+		ret = mmc_regulator_set_vqmmc(mmc, &mmc->ios);
+		if (ret < 0) {
+			dev_err(mmc_dev(mmc), "%s: IO_level setting failed(%d). signal_voltage: %d, vdd: %d irq_status: 0x%08x\n",
+					mmc_hostname(mmc), ret,
+					mmc->ios.signal_voltage, mmc->ios.vdd,
+					irq_status);
+			irq_ack |= CORE_PWRCTL_IO_FAIL;
+		}
+	}
+
+	/*
+	 * The driver has to acknowledge the interrupt, switch voltages and
+	 * report back if it succeeded or not to this register. The voltage
+	 * switches are handled by the sdhci core, so just report success.
+	 */
+	msm_bayhub_host_writel(msm_bayhub_host, irq_ack, host,
+			msm_bayhub_offset->core_pwrctl_ctl);
+
+	/*
+	 * If we don't have info regarding the voltage levels supported by
+	 * regulators, don't change the IO PAD PWR SWITCH.
+	 */
+	if (msm_bayhub_host->caps_0 & CORE_VOLT_SUPPORT) {
+		u32 new_config;
+		/*
+		 * We should unset IO PAD PWR switch only if the register write
+		 * can set IO lines high and the regulator also switches to 3 V.
+		 * Else, we should keep the IO PAD PWR switch set.
+		 * This is applicable to certain targets where eMMC vccq supply
+		 * is only 1.8V. In such targets, even during REQ_IO_HIGH, the
+		 * IO PAD PWR switch must be kept set to reflect actual
+		 * regulator voltage. This way, during initialization of
+		 * controllers with only 1.8V, we will set the IO PAD bit
+		 * without waiting for a REQ_IO_LOW.
+		 */
+		config = readl_relaxed(host->ioaddr +
+				msm_bayhub_offset->core_vendor_spec);
+		new_config = config;
+
+		if ((io_level & REQ_IO_HIGH) &&
+				(msm_bayhub_host->caps_0 & CORE_3_0V_SUPPORT))
+			new_config &= ~CORE_IO_PAD_PWR_SWITCH;
+		else if ((io_level & REQ_IO_LOW) ||
+				(msm_bayhub_host->caps_0 & CORE_1_8V_SUPPORT))
+			new_config |= CORE_IO_PAD_PWR_SWITCH;
+
+		if (config ^ new_config)
+			writel_relaxed(new_config, host->ioaddr +
+					msm_bayhub_offset->core_vendor_spec);
+	}
+
+	if (pwr_state)
+		msm_bayhub_host->curr_pwr_state = pwr_state;
+	if (io_level)
+		msm_bayhub_host->curr_io_level = io_level;
+
+	dev_dbg(mmc_dev(mmc), "%s: %s: Handled IRQ(%d), irq_status=0x%x, ack=0x%x\n",
+		mmc_hostname(msm_bayhub_host->mmc), __func__, irq, irq_status,
+		irq_ack);
+}
+
+static irqreturn_t sdhci_msm_bayhub_pwr_irq(int irq, void *data)
+{
+	struct sdhci_host *host = (struct sdhci_host *)data;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+
+	sdhci_msm_bayhub_handle_pwr_irq(host, irq);
+	msm_bayhub_host->pwr_irq_flag = 1;
+	sdhci_msm_bayhub_complete_pwr_irq_wait(msm_bayhub_host);
+
+
+	return IRQ_HANDLED;
+}
+
+static unsigned int sdhci_msm_bayhub_get_max_clock(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	struct clk *core_clk = msm_bayhub_host->bulk_clks[0].clk;
+
+	return clk_round_rate(core_clk, ULONG_MAX);
+}
+
+static unsigned int sdhci_msm_bayhub_get_min_clock(struct sdhci_host *host)
+{
+	return SDHCI_MSM_MIN_CLOCK;
+}
+
+/**
+ * __sdhci_msm_bayhub_set_clock - sdhci_msm_bayhub clock control.
+ *
+ * Description:
+ * MSM controller does not use internal divider and
+ * instead directly control the GCC clock as per
+ * HW recommendation.
+ **/
+static void __sdhci_msm_bayhub_set_clock(struct sdhci_host *host, unsigned int clock)
+{
+	u16 clk;
+
+	sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
+
+	if (clock == 0)
+		return;
+
+	/*
+	 * MSM controller do not use clock divider.
+	 * Thus read SDHCI_CLOCK_CONTROL and only enable
+	 * clock with no divider value programmed.
+	 */
+	clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+	sdhci_enable_clk(host, clk);
+}
+
+/* sdhci_msm_bayhub_set_clock - Called with (host->lock) spinlock held. */
+static void sdhci_msm_bayhub_set_clock(struct sdhci_host *host, unsigned int clock)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+
+	if (!clock) {
+		host->mmc->actual_clock = msm_bayhub_host->clk_rate = 0;
+		goto out;
+	}
+
+	sdhci_msm_bayhub_hc_select_mode(host);
+
+	msm_bayhub_set_clock_rate_for_bus_mode(host, clock);
+out:
+	__sdhci_msm_bayhub_set_clock(host, clock);
+}
+
+/*****************************************************************************\
+ *                                                                           *
+ * MSM Command Queue Engine (CQE)                                            *
+ *                                                                           *
+\*****************************************************************************/
+
+static u32 sdhci_msm_bayhub_cqe_irq(struct sdhci_host *host, u32 intmask)
+{
+	int cmd_error = 0;
+	int data_error = 0;
+
+	if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error))
+		return intmask;
+
+	cqhci_irq(host->mmc, intmask, cmd_error, data_error);
+	return 0;
+}
+
+static void sdhci_msm_bayhub_cqe_disable(struct mmc_host *mmc, bool recovery)
+{
+	struct sdhci_host *host = mmc_priv(mmc);
+	unsigned long flags;
+	u32 ctrl;
+
+	/*
+	 * When CQE is halted, the legacy SDHCI path operates only
+	 * on 16-byte descriptors in 64bit mode.
+	 */
+	if (host->flags & SDHCI_USE_64_BIT_DMA)
+		host->desc_sz = 16;
+
+	spin_lock_irqsave(&host->lock, flags);
+
+	/*
+	 * During CQE command transfers, command complete bit gets latched.
+	 * So s/w should clear command complete interrupt status when CQE is
+	 * either halted or disabled. Otherwise unexpected SDCHI legacy
+	 * interrupt gets triggered when CQE is halted/disabled.
+	 */
+	ctrl = sdhci_readl(host, SDHCI_INT_ENABLE);
+	ctrl |= SDHCI_INT_RESPONSE;
+	sdhci_writel(host,  ctrl, SDHCI_INT_ENABLE);
+	sdhci_writel(host, SDHCI_INT_RESPONSE, SDHCI_INT_STATUS);
+
+	spin_unlock_irqrestore(&host->lock, flags);
+
+	sdhci_cqe_disable(mmc, recovery);
+}
+
+static const struct cqhci_host_ops sdhci_msm_bayhub_cqhci_ops = {
+	.enable		= sdhci_cqe_enable,
+	.disable	= sdhci_msm_bayhub_cqe_disable,
+};
+
+static int sdhci_msm_bayhub_cqe_add_host(struct sdhci_host *host,
+				struct platform_device *pdev)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	struct cqhci_host *cq_host;
+	bool dma64;
+	u32 cqcfg;
+	int ret;
+
+	/*
+	 * When CQE is halted, SDHC operates only on 16byte ADMA descriptors.
+	 * So ensure ADMA table is allocated for 16byte descriptors.
+	 */
+	if (host->caps & SDHCI_CAN_64BIT)
+		host->alloc_desc_sz = 16;
+
+	ret = sdhci_setup_host(host);
+	if (ret)
+		return ret;
+
+	cq_host = cqhci_pltfm_init(pdev);
+	if (IS_ERR(cq_host)) {
+		ret = PTR_ERR(cq_host);
+		dev_err(&pdev->dev, "cqhci-pltfm init: failed: %d\n", ret);
+		goto cleanup;
+	}
+
+	msm_bayhub_host->mmc->caps2 |= MMC_CAP2_CQE | MMC_CAP2_CQE_DCMD;
+	cq_host->ops = &sdhci_msm_bayhub_cqhci_ops;
+
+	dma64 = host->flags & SDHCI_USE_64_BIT_DMA;
+
+	ret = cqhci_init(cq_host, host->mmc, dma64);
+	if (ret) {
+		dev_err(&pdev->dev, "%s: CQE init: failed (%d)\n",
+				mmc_hostname(host->mmc), ret);
+		goto cleanup;
+	}
+
+	/* Disable cqe reset due to cqe enable signal */
+	cqcfg = cqhci_readl(cq_host, CQHCI_VENDOR_CFG1);
+	cqcfg |= CQHCI_VENDOR_DIS_RST_ON_CQ_EN;
+	cqhci_writel(cq_host, cqcfg, CQHCI_VENDOR_CFG1);
+
+	/*
+	 * SDHC expects 12byte ADMA descriptors till CQE is enabled.
+	 * So limit desc_sz to 12 so that the data commands that are sent
+	 * during card initialization (before CQE gets enabled) would
+	 * get executed without any issues.
+	 */
+	if (host->flags & SDHCI_USE_64_BIT_DMA)
+		host->desc_sz = 12;
+
+	ret = __sdhci_add_host(host);
+	if (ret)
+		goto cleanup;
+
+	dev_info(&pdev->dev, "%s: CQE init: success\n",
+			mmc_hostname(host->mmc));
+	return ret;
+
+cleanup:
+	sdhci_cleanup_host(host);
+	return ret;
+}
+
+/*
+ * Platform specific register write functions. This is so that, if any
+ * register write needs to be followed up by platform specific actions,
+ * they can be added here. These functions can go to sleep when writes
+ * to certain registers are done.
+ * These functions are relying on sdhci_set_ios not using spinlock.
+ */
+static int __sdhci_msm_bayhub_check_write(struct sdhci_host *host, u16 val, int reg)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	u32 req_type = 0;
+
+	switch (reg) {
+	case SDHCI_HOST_CONTROL2:
+		req_type = (val & SDHCI_CTRL_VDD_180) ? REQ_IO_LOW :
+			REQ_IO_HIGH;
+		break;
+	case SDHCI_SOFTWARE_RESET:
+		if (host->pwr && (val & SDHCI_RESET_ALL))
+			req_type = REQ_BUS_OFF;
+		break;
+	case SDHCI_POWER_CONTROL:
+		req_type = !val ? REQ_BUS_OFF : REQ_BUS_ON;
+		break;
+	case SDHCI_TRANSFER_MODE:
+		msm_bayhub_host->transfer_mode = val;
+		break;
+	case SDHCI_COMMAND:
+		if (!msm_bayhub_host->use_cdr)
+			break;
+		if ((msm_bayhub_host->transfer_mode & SDHCI_TRNS_READ) &&
+		    SDHCI_GET_CMD(val) != MMC_SEND_TUNING_BLOCK_HS200 &&
+		    SDHCI_GET_CMD(val) != MMC_SEND_TUNING_BLOCK)
+			sdhci_msm_bayhub_set_cdr(host, true);
+		else
+			sdhci_msm_bayhub_set_cdr(host, false);
+		break;
+	}
+
+	if (req_type) {
+		msm_bayhub_host->pwr_irq_flag = 0;
+		/*
+		 * Since this register write may trigger a power irq, ensure
+		 * all previous register writes are complete by this point.
+		 */
+		mb();
+	}
+	return req_type;
+}
+
+/* This function may sleep*/
+static void sdhci_msm_bayhub_writew(struct sdhci_host *host, u16 val, int reg)
+{
+	u32 req_type = 0;
+
+	req_type = __sdhci_msm_bayhub_check_write(host, val, reg);
+	writew_relaxed(val, host->ioaddr + reg);
+
+	if (req_type)
+		sdhci_msm_bayhub_check_power_status(host, req_type);
+}
+
+/* This function may sleep*/
+static void sdhci_msm_bayhub_writeb(struct sdhci_host *host, u8 val, int reg)
+{
+	u32 req_type = 0;
+
+	req_type = __sdhci_msm_bayhub_check_write(host, val, reg);
+
+	writeb_relaxed(val, host->ioaddr + reg);
+
+	if (req_type)
+		sdhci_msm_bayhub_check_power_status(host, req_type);
+}
+
+static void sdhci_msm_bayhub_set_regulator_caps(struct sdhci_msm_bayhub_host *msm_bayhub_host)
+{
+	struct mmc_host *mmc = msm_bayhub_host->mmc;
+	struct regulator *supply = mmc->supply.vqmmc;
+	u32 caps = 0, config;
+	struct sdhci_host *host = mmc_priv(mmc);
+	const struct sdhci_msm_bayhub_offset *msm_bayhub_offset = msm_bayhub_host->offset;
+
+	if (!IS_ERR(mmc->supply.vqmmc)) {
+		if (regulator_is_supported_voltage(supply, 1700000, 1950000))
+			caps |= CORE_1_8V_SUPPORT;
+		if (regulator_is_supported_voltage(supply, 2700000, 3600000))
+			caps |= CORE_3_0V_SUPPORT;
+
+		if (!caps)
+			pr_warn("%s: 1.8/3V not supported for vqmmc\n",
+					mmc_hostname(mmc));
+	}
+
+	if (caps) {
+		/*
+		 * Set the PAD_PWR_SWITCH_EN bit so that the PAD_PWR_SWITCH
+		 * bit can be used as required later on.
+		 */
+		u32 io_level = msm_bayhub_host->curr_io_level;
+
+		config = readl_relaxed(host->ioaddr +
+				msm_bayhub_offset->core_vendor_spec);
+		config |= CORE_IO_PAD_PWR_SWITCH_EN;
+
+		if ((io_level & REQ_IO_HIGH) && (caps &	CORE_3_0V_SUPPORT))
+			config &= ~CORE_IO_PAD_PWR_SWITCH;
+		else if ((io_level & REQ_IO_LOW) || (caps & CORE_1_8V_SUPPORT))
+			config |= CORE_IO_PAD_PWR_SWITCH;
+
+		writel_relaxed(config,
+				host->ioaddr + msm_bayhub_offset->core_vendor_spec);
+	}
+	msm_bayhub_host->caps_0 |= caps;
+	pr_debug("%s: supported caps: 0x%08x\n", mmc_hostname(mmc), caps);
+}
+
+static void sdhci_msm_bayhub_reset(struct sdhci_host *host, u8 mask)
+{
+	if ((host->mmc->caps2 & MMC_CAP2_CQE) && (mask & SDHCI_RESET_ALL))
+		cqhci_deactivate(host->mmc);
+	sdhci_reset(host, mask);
+}
+
+static int sdhci_msm_bayhub_register_vreg(struct sdhci_msm_bayhub_host *msm_bayhub_host)
+{
+	int ret;
+
+	ret = mmc_regulator_get_supply(msm_bayhub_host->mmc);
+	if (ret)
+		return ret;
+
+	sdhci_msm_bayhub_set_regulator_caps(msm_bayhub_host);
+
+	return 0;
+}
+
+static int sdhci_msm_bayhub_start_signal_voltage_switch(struct mmc_host *mmc,
+				      struct mmc_ios *ios)
+{
+	struct sdhci_host *host = mmc_priv(mmc);
+	u16 ctrl, status;
+
+	/*
+	 * Signal Voltage Switching is only applicable for Host Controllers
+	 * v3.00 and above.
+	 */
+	if (host->version < SDHCI_SPEC_300)
+		return 0;
+
+	ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+
+	switch (ios->signal_voltage) {
+	case MMC_SIGNAL_VOLTAGE_330:
+		if (!(host->flags & SDHCI_SIGNALING_330))
+			return -EINVAL;
+
+		/* Set 1.8V Signal Enable in the Host Control2 register to 0 */
+		ctrl &= ~SDHCI_CTRL_VDD_180;
+		break;
+	case MMC_SIGNAL_VOLTAGE_180:
+		if (!(host->flags & SDHCI_SIGNALING_180))
+			return -EINVAL;
+
+		/* Enable 1.8V Signal Enable in the Host Control2 register */
+		ctrl |= SDHCI_CTRL_VDD_180;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
+
+	/* Wait for 5ms */
+	usleep_range(5000, 5500);
+
+	/* regulator output should be stable within 5 ms */
+	status = ctrl & SDHCI_CTRL_VDD_180;
+	ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+	if ((ctrl & SDHCI_CTRL_VDD_180) == status)
+		return 0;
+
+	dev_warn(mmc_dev(mmc), "%s: Regulator output did not became stable\n",
+		mmc_hostname(mmc));
+
+	return -EAGAIN;
+}
+
+#define DRIVER_NAME "sdhci_msm_bayhub"
+#define SDHCI_MSM_DUMP(f, x...) \
+	pr_err("%s: " DRIVER_NAME ": " f, mmc_hostname(host->mmc), ## x)
+
+static void sdhci_msm_bayhub_dump_vendor_regs(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	const struct sdhci_msm_bayhub_offset *msm_bayhub_offset = msm_bayhub_host->offset;
+
+	SDHCI_MSM_DUMP("----------- VENDOR REGISTER DUMP -----------\n");
+
+	SDHCI_MSM_DUMP(
+			"DLL sts: 0x%08x | DLL cfg:  0x%08x | DLL cfg2: 0x%08x\n",
+		readl_relaxed(host->ioaddr + msm_bayhub_offset->core_dll_status),
+		readl_relaxed(host->ioaddr + msm_bayhub_offset->core_dll_config),
+		readl_relaxed(host->ioaddr + msm_bayhub_offset->core_dll_config_2));
+	SDHCI_MSM_DUMP(
+			"DLL cfg3: 0x%08x | DLL usr ctl:  0x%08x | DDR cfg: 0x%08x\n",
+		readl_relaxed(host->ioaddr + msm_bayhub_offset->core_dll_config_3),
+		readl_relaxed(host->ioaddr + msm_bayhub_offset->core_dll_usr_ctl),
+		readl_relaxed(host->ioaddr + msm_bayhub_offset->core_ddr_config));
+	SDHCI_MSM_DUMP(
+			"Vndr func: 0x%08x | Vndr func2 : 0x%08x Vndr func3: 0x%08x\n",
+		readl_relaxed(host->ioaddr + msm_bayhub_offset->core_vendor_spec),
+		readl_relaxed(host->ioaddr +
+			msm_bayhub_offset->core_vendor_spec_func2),
+		readl_relaxed(host->ioaddr + msm_bayhub_offset->core_vendor_spec3));
+}
+
+static const struct sdhci_msm_bayhub_variant_ops mci_var_ops = {
+	.msm_bayhub_readl_relaxed = sdhci_msm_bayhub_mci_variant_readl_relaxed,
+	.msm_bayhub_writel_relaxed = sdhci_msm_bayhub_mci_variant_writel_relaxed,
+};
+
+static const struct sdhci_msm_bayhub_variant_ops v5_var_ops = {
+	.msm_bayhub_readl_relaxed = sdhci_msm_bayhub_v5_variant_readl_relaxed,
+	.msm_bayhub_writel_relaxed = sdhci_msm_bayhub_v5_variant_writel_relaxed,
+};
+
+static const struct sdhci_msm_bayhub_variant_info sdhci_msm_bayhub_v5_var = {
+	.mci_removed = true,
+	.var_ops = &v5_var_ops,
+	.offset = &sdhci_msm_bayhub_v5_offset,
+};
+
+static const struct sdhci_msm_bayhub_variant_info sdm845_sdhci_var = {
+	.mci_removed = true,
+	.restore_dll_config = true,
+	.var_ops = &v5_var_ops,
+	.offset = &sdhci_msm_bayhub_v5_offset,
+};
+
+static const struct of_device_id sdhci_msm_bayhub_dt_match[] = {
+	{.compatible = "qcom,sdhci-msm-bayhub-v5", .data = &sdhci_msm_bayhub_v5_var},
+	{.compatible = "qcom,sdm845-bayhub-sdhci", .data = &sdm845_sdhci_var},
+	{},
+};
+
+MODULE_DEVICE_TABLE(of, sdhci_msm_bayhub_dt_match);
+
+static const struct sdhci_ops sdhci_msm_bayhub_ops = {
+	.reset = sdhci_msm_bayhub_reset,
+	.set_clock = sdhci_msm_bayhub_set_clock,
+	.get_min_clock = sdhci_msm_bayhub_get_min_clock,
+	.get_max_clock = sdhci_msm_bayhub_get_max_clock,
+	.set_bus_width = sdhci_set_bus_width,
+	.set_uhs_signaling = sdhci_msm_bayhub_set_uhs_signaling,
+	.write_w = sdhci_msm_bayhub_writew,
+	.write_b = sdhci_msm_bayhub_writeb,
+	.irq	= sdhci_msm_bayhub_cqe_irq,
+	.dump_vendor_regs = sdhci_msm_bayhub_dump_vendor_regs,
+	.set_power = sdhci_set_power_noreg,
+};
+
+static const struct sdhci_pltfm_data sdhci_msm_bayhub_pdata = {
+	.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
+		  SDHCI_QUIRK_SINGLE_POWER_WRITE |
+		  SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
+		  SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12,
+
+	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
+	.ops = &sdhci_msm_bayhub_ops,
+};
+
+static inline void sdhci_msm_bayhub_get_of_property(struct platform_device *pdev,
+		struct sdhci_host *host)
+{
+	struct device_node *node = pdev->dev.of_node;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+
+	if (of_property_read_u32(node, "qcom,ddr-config",
+				&msm_bayhub_host->ddr_config))
+		msm_bayhub_host->ddr_config = DDR_CONFIG_POR_VAL;
+
+	of_property_read_u32(node, "qcom,dll-config", &msm_bayhub_host->dll_config);
+}
+
+static int sdhci_msm_bayhub_probe(struct platform_device *pdev)
+{
+	struct sdhci_host *host;
+	struct sdhci_pltfm_host *pltfm_host;
+	struct sdhci_msm_bayhub_host *msm_bayhub_host;
+	struct resource *core_memres;
+	struct clk *clk;
+	int ret;
+	u16 host_version, core_minor;
+	u32 core_version, config;
+	u8 core_major;
+	const struct sdhci_msm_bayhub_offset *msm_bayhub_offset;
+	const struct sdhci_msm_bayhub_variant_info *var_info;
+	struct device_node *node = pdev->dev.of_node;
+
+	host = sdhci_pltfm_init(pdev, &sdhci_msm_bayhub_pdata, sizeof(*msm_bayhub_host));
+	if (IS_ERR(host))
+		return PTR_ERR(host);
+
+	host->sdma_boundary = 0;
+	pltfm_host = sdhci_priv(host);
+	msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	msm_bayhub_host->mmc = host->mmc;
+	msm_bayhub_host->pdev = pdev;
+
+	ret = mmc_of_parse(host->mmc);
+	if (ret)
+		goto pltfm_free;
+
+	if (of_find_property(node, "use-bayhub-bh201", NULL)) {
+		sdhci_bh201_parse(msm_bayhub_host->mmc);
+		INIT_DELAYED_WORK(&host->mmc->detect, mmc_rescan_bayhub);
+	} else
+		msm_bayhub_host->ggc.bh201_used = 0;
+
+	/*
+	 * Based on the compatible string, load the required msm_bayhub host info from
+	 * the data associated with the version info.
+	 */
+	var_info = of_device_get_match_data(&pdev->dev);
+
+	msm_bayhub_host->mci_removed = var_info->mci_removed;
+	msm_bayhub_host->restore_dll_config = var_info->restore_dll_config;
+	msm_bayhub_host->var_ops = var_info->var_ops;
+	msm_bayhub_host->offset = var_info->offset;
+	msm_bayhub_host->uses_tassadar_dll = var_info->uses_tassadar_dll;
+
+	msm_bayhub_offset = msm_bayhub_host->offset;
+
+	sdhci_get_of_property(pdev);
+	sdhci_msm_bayhub_get_of_property(pdev, host);
+
+	msm_bayhub_host->saved_tuning_phase = INVALID_TUNING_PHASE;
+
+	/* Setup SDCC bus voter clock. */
+	msm_bayhub_host->bus_clk = devm_clk_get(&pdev->dev, "bus");
+	if (!IS_ERR(msm_bayhub_host->bus_clk)) {
+		/* Vote for max. clk rate for max. performance */
+		ret = clk_set_rate(msm_bayhub_host->bus_clk, INT_MAX);
+		if (ret)
+			goto pltfm_free;
+		ret = clk_prepare_enable(msm_bayhub_host->bus_clk);
+		if (ret)
+			goto pltfm_free;
+	}
+
+	/* Setup main peripheral bus clock */
+	clk = devm_clk_get(&pdev->dev, "iface");
+	if (IS_ERR(clk)) {
+		ret = PTR_ERR(clk);
+		dev_err(&pdev->dev, "Peripheral clk setup failed (%d)\n", ret);
+		goto bus_clk_disable;
+	}
+	msm_bayhub_host->bulk_clks[1].clk = clk;
+
+	/* Setup SDC MMC clock */
+	clk = devm_clk_get(&pdev->dev, "core");
+	if (IS_ERR(clk)) {
+		ret = PTR_ERR(clk);
+		dev_err(&pdev->dev, "SDC MMC clk setup failed (%d)\n", ret);
+		goto bus_clk_disable;
+	}
+	msm_bayhub_host->bulk_clks[0].clk = clk;
+
+	 /* Check for optional interconnect paths */
+	ret = dev_pm_opp_of_find_icc_paths(&pdev->dev, NULL);
+	if (ret)
+		goto bus_clk_disable;
+
+	msm_bayhub_host->opp_table = dev_pm_opp_set_clkname(&pdev->dev, "core");
+	if (IS_ERR(msm_bayhub_host->opp_table)) {
+		ret = PTR_ERR(msm_bayhub_host->opp_table);
+		goto bus_clk_disable;
+	}
+
+	/* OPP table is optional */
+	ret = dev_pm_opp_of_add_table(&pdev->dev);
+	if (!ret) {
+		msm_bayhub_host->has_opp_table = true;
+	} else if (ret != -ENODEV) {
+		dev_err(&pdev->dev, "Invalid OPP table in Device tree\n");
+		goto opp_cleanup;
+	}
+
+	/* Vote for maximum clock rate for maximum performance */
+	ret = dev_pm_opp_set_rate(&pdev->dev, INT_MAX);
+	if (ret)
+		dev_warn(&pdev->dev, "core clock boost failed\n");
+
+	clk = devm_clk_get(&pdev->dev, "cal");
+	if (IS_ERR(clk))
+		clk = NULL;
+	msm_bayhub_host->bulk_clks[2].clk = clk;
+
+	clk = devm_clk_get(&pdev->dev, "sleep");
+	if (IS_ERR(clk))
+		clk = NULL;
+	msm_bayhub_host->bulk_clks[3].clk = clk;
+
+	ret = clk_bulk_prepare_enable(ARRAY_SIZE(msm_bayhub_host->bulk_clks),
+				      msm_bayhub_host->bulk_clks);
+	if (ret)
+		goto opp_cleanup;
+
+	/*
+	 * xo clock is needed for FLL feature of cm_dll.
+	 * In case if xo clock is not mentioned in DT, warn and proceed.
+	 */
+	msm_bayhub_host->xo_clk = devm_clk_get(&pdev->dev, "xo");
+	if (IS_ERR(msm_bayhub_host->xo_clk)) {
+		ret = PTR_ERR(msm_bayhub_host->xo_clk);
+		dev_warn(&pdev->dev, "TCXO clk not present (%d)\n", ret);
+	}
+
+	if (!msm_bayhub_host->mci_removed) {
+		core_memres = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+		msm_bayhub_host->core_mem = devm_ioremap_resource(&pdev->dev,
+				core_memres);
+
+		if (IS_ERR(msm_bayhub_host->core_mem)) {
+			ret = PTR_ERR(msm_bayhub_host->core_mem);
+			goto clk_disable;
+		}
+	}
+
+	/* Reset the vendor spec register to power on reset state */
+	writel_relaxed(CORE_VENDOR_SPEC_POR_VAL,
+			host->ioaddr + msm_bayhub_offset->core_vendor_spec);
+
+	if (!msm_bayhub_host->mci_removed) {
+		/* Set HC_MODE_EN bit in HC_MODE register */
+		msm_bayhub_host_writel(msm_bayhub_host, HC_MODE_EN, host,
+				msm_bayhub_offset->core_hc_mode);
+		config = msm_bayhub_host_readl(msm_bayhub_host, host,
+				msm_bayhub_offset->core_hc_mode);
+		config |= FF_CLK_SW_RST_DIS;
+		msm_bayhub_host_writel(msm_bayhub_host, config, host,
+				msm_bayhub_offset->core_hc_mode);
+	}
+
+	host_version = readw_relaxed((host->ioaddr + SDHCI_HOST_VERSION));
+	dev_dbg(&pdev->dev, "Host Version: 0x%x Vendor Version 0x%x\n",
+		host_version, ((host_version & SDHCI_VENDOR_VER_MASK) >>
+			       SDHCI_VENDOR_VER_SHIFT));
+
+	core_version = msm_bayhub_host_readl(msm_bayhub_host, host,
+			msm_bayhub_offset->core_mci_version);
+	core_major = (core_version & CORE_VERSION_MAJOR_MASK) >>
+		      CORE_VERSION_MAJOR_SHIFT;
+	core_minor = core_version & CORE_VERSION_MINOR_MASK;
+	dev_dbg(&pdev->dev, "MCI Version: 0x%08x, major: 0x%04x, minor: 0x%02x\n",
+		core_version, core_major, core_minor);
+
+	if (core_major == 1 && core_minor >= 0x42)
+		msm_bayhub_host->use_14lpp_dll_reset = true;
+
+	/*
+	 * SDCC 5 controller with major version 1, minor version 0x34 and later
+	 * with HS 400 mode support will use CM DLL instead of CDC LP 533 DLL.
+	 */
+	if (core_major == 1 && core_minor < 0x34)
+		msm_bayhub_host->use_cdclp533 = true;
+
+	/*
+	 * Support for some capabilities is not advertised by newer
+	 * controller versions and must be explicitly enabled.
+	 */
+	if (core_major >= 1 && core_minor != 0x11 && core_minor != 0x12) {
+		config = readl_relaxed(host->ioaddr + SDHCI_CAPABILITIES);
+		config |= SDHCI_CAN_VDD_300 | SDHCI_CAN_DO_8BIT;
+		writel_relaxed(config, host->ioaddr +
+				msm_bayhub_offset->core_vendor_spec_capabilities0);
+	}
+
+	if (core_major == 1 && core_minor >= 0x49)
+		msm_bayhub_host->updated_ddr_cfg = true;
+
+	ret = sdhci_msm_bayhub_register_vreg(msm_bayhub_host);
+	if (ret)
+		goto clk_disable;
+
+	/*
+	 * Power on reset state may trigger power irq if previous status of
+	 * PWRCTL was either BUS_ON or IO_HIGH_V. So before enabling pwr irq
+	 * interrupt in GIC, any pending power irq interrupt should be
+	 * acknowledged. Otherwise power irq interrupt handler would be
+	 * fired prematurely.
+	 */
+	sdhci_msm_bayhub_handle_pwr_irq(host, 0);
+
+	/*
+	 * Ensure that above writes are propogated before interrupt enablement
+	 * in GIC.
+	 */
+	mb();
+
+	/* Setup IRQ for handling power/voltage tasks with PMIC */
+	msm_bayhub_host->pwr_irq = platform_get_irq_byname(pdev, "pwr_irq");
+	if (msm_bayhub_host->pwr_irq < 0) {
+		ret = msm_bayhub_host->pwr_irq;
+		goto clk_disable;
+	}
+
+	sdhci_msm_bayhub_init_pwr_irq_wait(msm_bayhub_host);
+	/* Enable pwr irq interrupts */
+	msm_bayhub_host_writel(msm_bayhub_host, INT_MASK, host,
+		msm_bayhub_offset->core_pwrctl_mask);
+
+	ret = devm_request_threaded_irq(&pdev->dev, msm_bayhub_host->pwr_irq, NULL,
+					sdhci_msm_bayhub_pwr_irq, IRQF_ONESHOT,
+					dev_name(&pdev->dev), host);
+	if (ret) {
+		dev_err(&pdev->dev, "Request IRQ failed (%d)\n", ret);
+		goto clk_disable;
+	}
+
+	msm_bayhub_host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_NEED_RSP_BUSY;
+
+	pm_runtime_get_noresume(&pdev->dev);
+	pm_runtime_set_active(&pdev->dev);
+	pm_runtime_enable(&pdev->dev);
+	pm_runtime_set_autosuspend_delay(&pdev->dev,
+					 MSM_MMC_AUTOSUSPEND_DELAY_MS);
+	pm_runtime_use_autosuspend(&pdev->dev);
+
+	host->mmc_host_ops.start_signal_voltage_switch =
+		sdhci_msm_bayhub_start_signal_voltage_switch;
+	if (msm_bayhub_host->ggc.bh201_used)
+		host->mmc_host_ops.execute_tuning = sdhci_bht_execute_tuning;
+	else
+		host->mmc_host_ops.execute_tuning = sdhci_msm_bayhub_execute_tuning;
+
+	if (of_property_read_bool(node, "supports-cqe"))
+		ret = sdhci_msm_bayhub_cqe_add_host(host, pdev);
+	else
+		ret = sdhci_add_host(host);
+	if (ret)
+		goto pm_runtime_disable;
+
+	pm_runtime_mark_last_busy(&pdev->dev);
+	pm_runtime_put_autosuspend(&pdev->dev);
+
+	return 0;
+
+pm_runtime_disable:
+	pm_runtime_disable(&pdev->dev);
+	pm_runtime_set_suspended(&pdev->dev);
+	pm_runtime_put_noidle(&pdev->dev);
+clk_disable:
+	clk_bulk_disable_unprepare(ARRAY_SIZE(msm_bayhub_host->bulk_clks),
+				   msm_bayhub_host->bulk_clks);
+opp_cleanup:
+	if (msm_bayhub_host->has_opp_table)
+		dev_pm_opp_of_remove_table(&pdev->dev);
+	dev_pm_opp_put_clkname(msm_bayhub_host->opp_table);
+bus_clk_disable:
+	if (!IS_ERR(msm_bayhub_host->bus_clk))
+		clk_disable_unprepare(msm_bayhub_host->bus_clk);
+pltfm_free:
+	if (msm_bayhub_host->ggc.bh201_used) {
+		if (gpio_is_valid(msm_bayhub_host->ggc.det_gpio))
+			devm_gpio_free(&pdev->dev, msm_bayhub_host->ggc.det_gpio);
+		if (gpio_is_valid(msm_bayhub_host->ggc.pwr_gpio))
+			devm_gpio_free(&pdev->dev, msm_bayhub_host->ggc.pwr_gpio);
+	}
+
+	sdhci_pltfm_free(pdev);
+	return ret;
+}
+
+static int sdhci_msm_bayhub_remove(struct platform_device *pdev)
+{
+	struct sdhci_host *host = platform_get_drvdata(pdev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	int dead = (readl_relaxed(host->ioaddr + SDHCI_INT_STATUS) ==
+		    0xffffffff);
+
+	sdhci_remove_host(host, dead);
+	if (msm_bayhub_host->ggc.bh201_used) {
+		if (gpio_is_valid(msm_bayhub_host->ggc.det_gpio))
+			devm_gpio_free(&pdev->dev, msm_bayhub_host->ggc.det_gpio);
+		if (gpio_is_valid(msm_bayhub_host->ggc.pwr_gpio))
+			devm_gpio_free(&pdev->dev, msm_bayhub_host->ggc.pwr_gpio);
+	}
+	if (msm_bayhub_host->has_opp_table)
+		dev_pm_opp_of_remove_table(&pdev->dev);
+	dev_pm_opp_put_clkname(msm_bayhub_host->opp_table);
+	pm_runtime_get_sync(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+	pm_runtime_put_noidle(&pdev->dev);
+
+	clk_bulk_disable_unprepare(ARRAY_SIZE(msm_bayhub_host->bulk_clks),
+				   msm_bayhub_host->bulk_clks);
+	if (!IS_ERR(msm_bayhub_host->bus_clk))
+		clk_disable_unprepare(msm_bayhub_host->bus_clk);
+	sdhci_pltfm_free(pdev);
+	return 0;
+}
+
+static __maybe_unused int sdhci_msm_bayhub_runtime_suspend(struct device *dev)
+{
+	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+
+	/* Drop the performance vote */
+	dev_pm_opp_set_rate(dev, 0);
+	clk_bulk_disable_unprepare(ARRAY_SIZE(msm_bayhub_host->bulk_clks),
+				   msm_bayhub_host->bulk_clks);
+
+	return 0;
+}
+
+static __maybe_unused int sdhci_msm_bayhub_runtime_resume(struct device *dev)
+{
+	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_bayhub_host *msm_bayhub_host = sdhci_pltfm_priv(pltfm_host);
+	int ret;
+
+	ret = clk_bulk_prepare_enable(ARRAY_SIZE(msm_bayhub_host->bulk_clks),
+				       msm_bayhub_host->bulk_clks);
+	if (ret)
+		return ret;
+	/*
+	 * Whenever core-clock is gated dynamically, it's needed to
+	 * restore the SDR DLL settings when the clock is ungated.
+	 */
+	if (msm_bayhub_host->restore_dll_config && msm_bayhub_host->clk_rate)
+		ret = sdhci_msm_bayhub_restore_sdr_dll_config(host);
+
+	dev_pm_opp_set_rate(dev, msm_bayhub_host->clk_rate);
+
+	return ret;
+}
+
+static const struct dev_pm_ops sdhci_msm_bayhub_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
+	SET_RUNTIME_PM_OPS(sdhci_msm_bayhub_runtime_suspend,
+			   sdhci_msm_bayhub_runtime_resume,
+			   NULL)
+};
+
+static struct platform_driver sdhci_msm_bayhub_driver = {
+	.probe = sdhci_msm_bayhub_probe,
+	.remove = sdhci_msm_bayhub_remove,
+	.driver = {
+		   .name = "sdhci_msm_bayhub",
+		   .of_match_table = sdhci_msm_bayhub_dt_match,
+		   .pm = &sdhci_msm_bayhub_pm_ops,
+		   .probe_type = PROBE_PREFER_ASYNCHRONOUS,
+	},
+};
+
+module_platform_driver(sdhci_msm_bayhub_driver);
+
+MODULE_DESCRIPTION("Qualcomm-bayhub Secure Digital Host Controller Interface driver");
+MODULE_LICENSE("GPL v2");
-- 
2.25.1