[PATCH 2/2] mmc:sdhci-bayhub:provide a solution to improve sd host card compatibility

[Chevron Li]

Improve the signal integrity for long SD bus trace with GGC SD host redriver chip
1.GGC is a SD bus signal re-timing IC that has been paired with the SC7180 sometimes.
2.The key points as below:
 2.1 GGC chip is initialized during SD initialization
 2.2 GGC special tuning flow is used to re-timing SD bus signal.
 2.3 GGC power signal control should follow sd host power signal control.
3.The function of the patch is already verified on Chrome OS, and Google request us to submit the patch to Linux for them future use.
4.GGC can work with any other standard SDHCI controller to improve SD signal SI and Timing.
5.GGC has cooperated with Intel/Qualcomm/MTK/SPRD sd host already and work well.
6.This file is created for collecting the GGC chip support APIs and variables
This patch depends on patch:
mmc:sdhci-msm:fix Qualcomm sd host 7180 SD card compatibility issue

Signed-off-by: Chevron Li <chevron.li@xxxxxxxxxxxxxx>
---
Changes:
1.Implement the sdhci_bht_host structure
2.Implement the functions used at sdhci-msm.c
---
 drivers/mmc/host/sdhci-bayhub.c | 3374 ++++++++++++++++++++++++++++++-
 1 file changed, 3370 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/sdhci-bayhub.c b/drivers/mmc/host/sdhci-bayhub.c
index 867d465ce848..622c4c05b2e4 100644
--- a/drivers/mmc/host/sdhci-bayhub.c
+++ b/drivers/mmc/host/sdhci-bayhub.c
@@ -5,30 +5,3396 @@
  *
  * Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
  */
+#include <linux/of_gpio.h>
+#include "../core/sdio_ops.h"
+#include "../core/sd.c"
+#include "../core/pwrseq.h"
+
+#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	TUNING_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_TUNING_RING_IDX_VALUE(tb, x) \
+	(tb & (1 << TUNING_RING_IDX(x)))
+#define	GENERATE_TUNING_RING_IDX_VALUE(x) \
+	(1 << TUNING_RING_IDX(x))
+#define	MAX_CFG_BIT_VAL (383)
+
+/*
+ * This part define the GGC used structure
+ * The GGC chip can work with standard SD host controller
+ * GGC is the chip IC name and it's a SD bus signal re-timing IC
+ * Aim at high-speed SD mode(ex.SDR104) and long wire of SD signals
+ */
+#define TUNING_PHASE_SIZE	11
+static const u32 ggc_cfg_data[16] = {
+	0x07000000, 0x07364022, 0x01015412, 0x01062400,
+	0x10400076, 0x00025432, 0x01046076, 0x62011000,
+	0x30503106, 0x64141711, 0x10057513, 0x00336200,
+	0x00020006, 0x40000400, 0x12200310, 0x3A314177
+};
+
+struct ggc_bus_mode_cfg {
+	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_state {
+	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 ggc_reg_op {
+	u32 ofs;
+	u32 mask;
+	u32 value;
+};
+
+static const char *const op_dbg_str[] = {
+	"no tuning",
+	"pass",
+	"set_phase_fail",
+	"tuning fail",
+	"read status fail",
+	"tuning CMD7 timeout",
+	"retuning case"
+};
 
 struct sdhci_bht_host {
+	struct ggc_bus_mode_cfg sdr50;
+	struct ggc_bus_mode_cfg sdr104;
+	struct ggc_bus_mode_cfg *cur_bus_mode;
+
+	struct ggc_reg_op pha_stas_rx_low32;
+	struct ggc_reg_op pha_stas_rx_high32;
+	struct ggc_reg_op pha_stas_tx_low32;
+	struct ggc_reg_op pha_stas_tx_high32;
+	struct ggc_reg_op dll_sela_after_mask;
+	struct ggc_reg_op dll_selb_after_mask;
+
+	struct ggc_reg_op dll_delay_100m_backup;
+	struct ggc_reg_op dll_delay_200m_backup;
+
+	struct ggc_reg_op dll_sela_100m_cfg;
+	struct ggc_reg_op dll_sela_200m_cfg;
+	struct ggc_reg_op dll_selb_100m_cfg;
+	struct ggc_reg_op dll_selb_200m_cfg;
+	struct ggc_reg_op dll_selb_100m_cfg_en;
+	struct ggc_reg_op dll_selb_200m_cfg_en;
+	struct ggc_reg_op internl_tuning_en_100m;
+	struct ggc_reg_op internl_tuning_en_200m;
+	struct ggc_reg_op cmd19_cnt_cfg;
+
+	struct ggc_reg_op inject_failure_for_tuning_enable_cfg;
+	struct ggc_reg_op inject_failure_for_200m_tuning_cfg;
+	struct ggc_reg_op 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_state 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 pwr_gpio; /* External power enable pin for Redriver IC */
+	int det_gpio;
 };
 
+/*
+ * The APIs used to initialization GGC chip and structure
+ */
+static void cfg_bit_2_byte(int max_bit, int tar, int *byt, int *bit)
+{
+	u8 cfg_bit_map[6] = {6, 5, 4, 2, 1, 0};
+
+	*byt = (max_bit - tar) / 6;
+	*bit = cfg_bit_map[(max_bit - tar) % 6];
+}
+
+static u32 cfg_read_bits_ofs_mask(u8 *cfg, struct ggc_reg_op *bits)
+{
+	u32 rv = 0;
+	u32 mask = bits->mask;
+	int byte = 0, bit = 0;
+	int i = 0;
+
+	while (mask) {
+		cfg_bit_2_byte(MAX_CFG_BIT_VAL, bits->ofs + i, &byte, &bit);
+		if (cfg[byte] & (1 << bit))
+			rv |= 1 << i;
+
+		i++;
+		mask >>= 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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	ggc->def_sela_100m =
+		cfg_read_bits_ofs_mask(data, &ggc->dll_sela_100m_cfg);
+	ggc->def_sela_200m =
+		cfg_read_bits_ofs_mask(data, &ggc->dll_sela_200m_cfg);
+	ggc->def_selb_100m =
+		cfg_read_bits_ofs_mask(data, &ggc->dll_sela_100m_cfg);
+	ggc->def_selb_200m =
+		cfg_read_bits_ofs_mask(data, &ggc->dll_sela_200m_cfg);
+}
+
+static void cfg_write_bits_ofs_mask(u8 *cfg,
+		struct ggc_reg_op *bits, u32 write_value)
+{
+	u32 wv = write_value & bits->mask;
+	u32 mask = bits->mask;
+	int byte = 0, bit = 0;
+	int i = 0;
+
+	while (mask) {
+		cfg_bit_2_byte(MAX_CFG_BIT_VAL, bits->ofs + i, &byte, &bit);
+		if (wv & 1)
+			cfg[byte] |= (u8) (1 << bit);
+		else
+			cfg[byte] &= (u8) (~(1 << bit));
+
+		i++;
+		wv >>= 1;
+		mask >>= 1;
+	};
+}
+
+/* Use to get byte offset and bit offset */
+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 sdhci_bht_host  *ggc,
+	u8 *data, u8 len)
+{
+	memcpy(&ggc->gg_reg_cur[0], data, len);
+}
+
+static void get_gg_reg_cur_val(struct sdhci_bht_host  *ggc,
+	u8 *data, u8 len)
+{
+	memcpy(data, &ggc->gg_reg_cur[0], len);
+}
+
+static u32 read_ram_bits_ofs_mask(u8 *cfg, struct ggc_reg_op *bits)
+{
+	u32 rv = 0;
+	u32 mask = bits->mask;
+	int byte = 0, bit = 0;
+	int i = 0;
+
+	while (mask) {
+		/* No replace interface at bitmap
+		 * The read out address maybe not align at byte
+		 */
+		ram_bit_2_bt(bits->ofs + i, &byte, &bit);
+		if (cfg[byte] & (1 << bit))
+			rv |= 1 << i;
+
+		i++;
+		mask >>= 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_host *vendor_host =
+						sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	for (i = 0; i < 4; i++) {
+		ggc->dll_voltage_scan_map[i] = 0;
+		ggc->sdr50.dll_voltage_unlock_cnt[i] = 0;
+		ggc->sdr104.dll_voltage_unlock_cnt[i] = 0;
+	}
+}
+
+static void ggc_chip_init(struct sdhci_host *host)
+{
+	u8 data[512];
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_host *vendor_host =
+						sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	memcpy(data, ggc_cfg_data, sizeof(ggc_cfg_data));
+	get_default_setting(host, data);
+	set_gg_reg_cur_val(ggc, data, 64);
+}
+
+static void driver_send_command7(struct sdhci_host *host)
+{
+	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;
+	mmc_wait_for_cmd(mmc, &cmd, 3);
+}
+
+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);
+
+	if (!data1)
+		return;
+
+	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)
+{
+	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_host *vendor_host =
+						sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	memset(&ggc->sdr104.tx_selb_tb, 0xff,
+			sizeof(ggc->sdr104.tx_selb_tb));
+	memset(&ggc->sdr50.tx_selb_tb, 0xff,
+			sizeof(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_host *vendor_host =
+						sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	memset(&ggc->sdr104.all_selb_tb, 0xff,
+			sizeof(ggc->sdr104.all_selb_tb));
+	memset(&ggc->sdr50.all_selb_tb, 0xff,
+			sizeof(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_host *vendor_host =
+						sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	ggc->sdr50.tx_selb_failed_history = BIT_PASS_MASK;
+	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_host *host)
+{
+	int i = 0;
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(host);
+
+	for (i = 0; i < TUNING_PHASE_SIZE; i++)
+		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_host *vendor_host =
+						sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	ggc_reset_selx_failed_tb(host);
+	ggc->ggc_cmd_tx_selb_failed_range = BIT_PASS_MASK;
+	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_host *vendor_host =
+						sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	_ggc_reset_tuning_result_for_dll(host);
+
+	ggc->sdr50.bus_mode = SD_FNC_AM_SDR50;
+	ggc->sdr104.bus_mode = SD_FNC_AM_SDR104;
+	ggc->driver_strength_reinit_flg = 0;
+	ggc->cur_bus_mode = NULL;
+	ggc->dll_unlock_reinit_flg = 0;
+	ggc->tuning_cmd7_timeout_reinit_flg = 0;
+	ggc->tuning_cmd7_timeout_reinit_cnt = 0;
+	ggc->sdr50_notuning_sela_inject_flag = 1;
+	ggc->sdr50_notuning_crc_error_flag = 0;
+	ggc->sdr50_notuning_sela_rx_inject =
+						ggc->bh201_sdr50_sela_sw_inject;
+}
+
+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_host *vendor_host =
+						sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+	u32 gg_hw_inj[16];
+
+	memcpy(gg_hw_inj, ggc_cfg_data, sizeof(ggc_cfg_data));
+	gg_hw_inj[1] = 0x7364032;
+	gg_hw_inj[11] = ggc->bh201_sdr104_selb_hw_inject;
+	gg_hw_inj[12] = ggc->bh201_sdr50_selb_hw_inject;
+	gg_hw_inj[15] = 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_host *vendor_host =
+						sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+	u8 driver_strength_reinit_flg =
+				ggc->driver_strength_reinit_flg;
+	int cur_dll_voltage_idx = ggc->cur_dll_voltage_idx;
+	u32 i = 0;
+	u32 reg;
+	u32 gg_sw_def[16];
+	u8 data[512];
+	static const int s_dll_voltage_cfg[4][2] = {
+		{0x30503106, 0x64141711},
+		{0x31503106, 0x64141711},
+		{0x30503106, 0x64141751},
+		{0x31503106, 0x64141751},
+	};
+
+	memcpy(gg_sw_def, ggc_cfg_data, sizeof(ggc_cfg_data));
+
+	pr_debug("%s: Load BHT patch\n", mmc_hostname(mmc_host));
+
+	mmc_send_relative_addr(mmc_host, &card->rca);
+	mmc_host->card = card;
+	if (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 (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 (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 (ggc->tuning_cmd7_timeout_reinit_flg == 0
+				&& 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(ggc, (u8 *)gg_sw_def, sizeof(gg_sw_def));
+	} else {
+		if (ggc->selx_tuning_done_flag)
+			pr_debug("%s: skip load default configuration for tuning done\n",
+				mmc_hostname(mmc_host));
+		if (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(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 bht_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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	if (gpio_is_valid(ggc->det_gpio)) {
+		card_present_status = gpio_get_value(ggc->det_gpio);
+		pr_debug("%s: detect_gpio pin %d status is %d\n",
+		mmc_hostname(host->mmc), 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(ggc->pwr_gpio)) {
+			gpio_direction_output(ggc->pwr_gpio, 1);
+			msleep(100);
+			pr_debug("%s: pwr_gpio pin %d status is %d\n",
+				mmc_hostname(host->mmc), ggc->pwr_gpio,
+				gpio_get_value(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(ggc->pwr_gpio)) {
+			gpio_direction_output(ggc->pwr_gpio, 0);
+			pr_debug("%s: pwr_gpio pin %d status is %d\n",
+			mmc_hostname(host->mmc), ggc->pwr_gpio,
+			gpio_get_value(ggc->pwr_gpio));
+		} else {
+			pr_err("%s: no pwr_gpio provided\n", mmc_hostname(host->mmc));
+		}
+	}
 }
 
 static void sdhci_bht_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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+	struct device_node *np = vendor_host->pdev->dev.of_node;
+	struct ggc_reg_op 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(&ggc->pha_stas_rx_low32, &index_array[0],
+		sizeof(struct ggc_reg_op));
+	memcpy(&ggc->pha_stas_rx_high32, &index_array[1],
+		sizeof(struct ggc_reg_op));
+	memcpy(&ggc->pha_stas_tx_low32, &index_array[2],
+		sizeof(struct ggc_reg_op));
+	memcpy(&ggc->pha_stas_tx_high32, &index_array[3],
+		sizeof(struct ggc_reg_op));
+	memcpy(&ggc->dll_sela_after_mask, &index_array[4],
+		sizeof(struct ggc_reg_op));
+	memcpy(&ggc->dll_selb_after_mask, &index_array[5],
+		sizeof(struct ggc_reg_op));
+
+	memcpy(&ggc->dll_delay_100m_backup, &index_array[6],
+		sizeof(struct ggc_reg_op));
+	memcpy(&ggc->dll_delay_200m_backup, &index_array[7],
+		sizeof(struct ggc_reg_op));
+
+	memcpy(&ggc->dll_sela_100m_cfg, &index_array[8],
+		sizeof(struct ggc_reg_op));
+	memcpy(&ggc->dll_sela_200m_cfg, &index_array[9],
+		sizeof(struct ggc_reg_op));
+	memcpy(&ggc->dll_selb_100m_cfg, &index_array[10],
+		sizeof(struct ggc_reg_op));
+	memcpy(&ggc->dll_selb_200m_cfg, &index_array[11],
+		sizeof(struct ggc_reg_op));
+	memcpy(&ggc->dll_selb_100m_cfg_en, &index_array[12],
+		sizeof(struct ggc_reg_op));
+	memcpy(&ggc->dll_selb_200m_cfg_en, &index_array[13],
+		sizeof(struct ggc_reg_op));
+	memcpy(&ggc->internl_tuning_en_100m, &index_array[14],
+		sizeof(struct ggc_reg_op));
+	memcpy(&ggc->internl_tuning_en_200m, &index_array[15],
+		sizeof(struct ggc_reg_op));
+	memcpy(&ggc->cmd19_cnt_cfg, &index_array[16],
+		sizeof(struct ggc_reg_op));
+
+	memcpy(&ggc->inject_failure_for_tuning_enable_cfg,
+	&index_array[17], sizeof(struct ggc_reg_op));
+	memcpy(&ggc->inject_failure_for_200m_tuning_cfg,
+	&index_array[18], sizeof(struct ggc_reg_op));
+	memcpy(&ggc->inject_failure_for_100m_tuning_cfg,
+	&index_array[19], sizeof(struct ggc_reg_op));
+
+	ggc->bh201_drive_strength = 0x3A314177;
+	ggc->bh201_sdr50_sela_sw_inject = 0x47F;
+	ggc->bh201_sdr50_selb_hw_inject = 0x00725777;
+	ggc->bh201_sdr104_selb_hw_inject = 0x57336200;
+	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,
+			&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,
+			&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,
+			&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,
+			&ggc->bh201_sdr104_selb_hw_inject);
+
+	ggc->pwr_gpio = of_get_named_gpio(np, "pwr-gpios", 0);
+	if (!gpio_is_valid(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");
+
+	ggc->det_gpio = of_get_named_gpio(np, "det-gpios", 0);
+	if (!gpio_is_valid(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(ggc->pwr_gpio)) {
+		devm_gpio_request_one(&vendor_host->pdev->dev, ggc->pwr_gpio,
+			GPIOF_OUT_INIT_LOW, "sprd-1-pwr");
+		pr_debug("%s: detect_gpio pin %d\n",
+			mmc_hostname(host->mmc), ggc->pwr_gpio);
+	} else {
+		pr_err("%s: no detect_gpio provided\n",
+			mmc_hostname(host->mmc));
+	}
+
+	if (gpio_is_valid(ggc->det_gpio)) {
+		devm_gpio_request_one(&vendor_host->pdev->dev, ggc->det_gpio,
+		GPIOF_DIR_IN, "sprd-1-det");
+		pr_debug("%s: detect_gpio pin %d\n",
+			mmc_hostname(host->mmc), ggc->det_gpio);
+	} else {
+		pr_err("%s: no detect_gpio provided\n",
+			mmc_hostname(host->mmc));
+	}
 }
 
 static void sdhci_bht_resource_free(struct sdhci_msm_host *vendor_host)
 {
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+	struct platform_device *pdev = vendor_host->pdev;
+
+	if (gpio_is_valid(ggc->det_gpio))
+		devm_gpio_free(&pdev->dev, ggc->det_gpio);
+	if (gpio_is_valid(ggc->pwr_gpio))
+		devm_gpio_free(&pdev->dev, ggc->pwr_gpio);
 }
 
-static void mmc_rescan_bht(struct work_struct *work)
+/*
+ * The code porting from mmc/core start
+ * We need to porting the code from mmc/core for below reasons:
+ * 1.ACMD42 should be added between Bus width switch and transfer mode switch
+ * 2.Bus width switch should at front of transfer mode switch during mode switch stage
+ * 3.If above two points can be patched to sd.c directly, we can decrease much redundant code
+ * 4.Above changes match with SD host spec, but don’t match with current sd initialazation flow
+ */
+static const unsigned int freqs[] = { 400000, 300000, 200000, 100000 };
+
+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 sdhci_bht_execute_tuning(struct mmc_host *mmc, u32 opcode)
+static int mmc_app_set_clr_card_detect(struct mmc_card *card)
 {
-	int ret = 0;
+	struct mmc_command cmd = {};
 
-	return ret;
+	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 mmc_sd_init_uhs_card_bayhub(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);
+
+	/* GGC chip need this command to switch mode */
+	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;
+}
+
+/*
+ * Handle the detection and initialisation of a card.
+ *
+ * In the case of a resume, "oldcard" will contain the card
+ * we're trying to reinitialise.
+ */
+static int mmc_sd_init_card_bayhub(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(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) ||
+			    mmc_sd_init_uhs_card_bayhub(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 = mmc_sd_init_uhs_card_bayhub(card);
+		if (err)
+			goto free_card;
+	} else {
+		/*
+		 * Switch to wider bus (if supported).
+		 * Bayhub patch move mmc_app_set_bus_width in front of mmc_sd_switch_hs
+		 */
+		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);
+		}
+
+		/* GGC chip need this command to switch mode */
+		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 (!oldcard) {
+		/* Read/parse the extension registers. */
+		err = sd_read_ext_regs(card);
+		if (err)
+			goto free_card;
+	}
+
+	/* Enable internal SD cache if supported. */
+	if (card->ext_perf.feature_support & SD_EXT_PERF_CACHE) {
+		err = sd_enable_cache(card);
+		if (err)
+			goto free_card;
+	}
+
+	if (host->cqe_ops && !host->cqe_enabled) {
+		err = host->cqe_ops->cqe_enable(host, card);
+		if (!err) {
+			host->cqe_enabled = true;
+			host->hsq_enabled = true;
+			pr_info("%s: Host Software Queue enabled\n",
+				mmc_hostname(host));
+		}
+	}
+
+	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;
+}
+
+static int mmc_sd_hw_reset_bayhub(struct mmc_host *host)
+{
+	mmc_power_cycle(host, host->card->ocr);
+	return mmc_sd_init_card_bayhub(host, host->card->ocr, host->card);
+}
+
+static const struct mmc_bus_ops mmc_sd_ops_bayhub = {
+	.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_bayhub,
+	.cache_enabled = sd_cache_enabled,
+	.flush_cache = sd_flush_cache,
+};
+
+/*
+ * Starting point for SD card init.
+ */
+static int mmc_attach_sd_bayhub(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_bayhub);
+
+	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 = mmc_sd_init_card_bayhub(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)) {
+		if (mmc_send_if_cond_pcie(host, host->ocr_avail))
+			goto out;
+		if (mmc_card_sd_express(host))
+			return 0;
+	}
+
+	/* 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 (!mmc_attach_sd_bayhub(host))
+			return 0;
+
+	if (!(host->caps2 & MMC_CAP2_NO_MMC))
+		if (!mmc_attach_mmc(host))
+			return 0;
+
+out:
+	mmc_power_off(host);
+	return -EIO;
 }
 
+static void mmc_rescan_bht(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;
+	}
+
+	/* Verify a registered card to be functional, else remove it. */
+	if (host->bus_ops)
+		host->bus_ops->detect(host);
+
+	host->detect_change = 0;
+
+	/* if there still is a card present, stop here */
+	if (host->bus_ops != NULL)
+		goto out;
+
+	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;
+	}
+
+	/* If an SD express card is present, then leave it as is. */
+	if (mmc_card_sd_express(host)) {
+		mmc_release_host(host);
+		goto out;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(freqs); i++) {
+		unsigned int freq = freqs[i];
+
+		if (freq > host->f_max) {
+			if (i + 1 < ARRAY_SIZE(freqs))
+				continue;
+			freq = host->f_max;
+		}
+		if (!mmc_rescan_try_freq(host, max(freq, 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);
+}
+
+/* The code porting from mmc/core end */
+
+/*
+ * The APIs used to select good timing and configure GGC chip
+ */
+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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_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))
+		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 ggc_reg_op *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 ggc_reg_op *gg_reg_arr, u8 num)
+{
+	u8 get_idx = 0;
+	bool ret = false;
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_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)
+		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 ggc_reg_op *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 sdhci_bht_host  *ggc, u8 *data,
+	struct ggc_reg_op *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 ggc_reg_op gg_reg_arr[8];
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	get_gg_reg_cur_val(ggc, data, 64);
+	memcpy(&gg_reg_arr[0], &ggc->dll_sela_100m_cfg,
+			sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[1], &ggc->dll_sela_200m_cfg,
+			sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[2], &ggc->dll_selb_100m_cfg,
+			sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[3], &ggc->dll_selb_200m_cfg,
+			sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[4], &ggc->dll_selb_100m_cfg_en,
+			sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[5], &ggc->dll_selb_200m_cfg_en,
+			sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[6], &ggc->internl_tuning_en_100m,
+		  sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[7], &ggc->internl_tuning_en_200m,
+		  sizeof(struct ggc_reg_op));
+	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(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 ggc_reg_op gg_reg_arr[10];
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	pr_debug("BHT MSG: %s - sela dll: %x, selb dll: %x\n", __func__, sela,
+		selb);
+
+	get_gg_reg_cur_val(ggc, data, 64);
+
+	memcpy(&gg_reg_arr[0], &ggc->dll_sela_100m_cfg,
+			sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[1], &ggc->dll_sela_200m_cfg,
+			sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[2], &ggc->dll_selb_100m_cfg,
+			sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[3], &ggc->dll_selb_200m_cfg,
+			sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[4], &ggc->dll_selb_100m_cfg_en,
+			sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[5], &ggc->dll_selb_200m_cfg_en,
+			sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[6], &ggc->internl_tuning_en_100m,
+		  sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[7], &ggc->internl_tuning_en_200m,
+		  sizeof(struct ggc_reg_op));
+	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(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 ggc_reg_op gg_reg_arr[6];
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	memcpy(&gg_reg_arr[0], &ggc->pha_stas_tx_low32, sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[1], &ggc->pha_stas_tx_high32, sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[2], &ggc->pha_stas_rx_low32, sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[3], &ggc->pha_stas_rx_high32, sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[4], &ggc->dll_sela_after_mask, sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[5], &ggc->dll_selb_after_mask, sizeof(struct ggc_reg_op));
+
+	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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	if (is_bus_mode_sdr104(host))
+		ggc->cur_bus_mode = &ggc->sdr104;
+	else
+		ggc->cur_bus_mode = &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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	_check_bus_mode(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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	_check_bus_mode(host);
+
+	return 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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	_check_bus_mode(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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+	u32 value = 0;
+
+	_check_bus_mode(host);
+
+	if (is_bus_mode_sdr104(host))
+		value = ggc->sdr104.tx_selb_tb[sela];
+	else
+		value = 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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	_check_bus_mode(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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+	u32 val;
+
+	_check_bus_mode(host);
+
+	val = 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 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;
+}
+
+static 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_TUNING_RING_IDX_VALUE(val, i)) == 0 && (flg == 0))
+			flg = 1;
+		if ((flg == 1) && GET_TUNING_RING_IDX_VALUE(val, i)) {
+			*start = TUNING_RING_IDX(i);
+			break;
+		}
+	}
+}
+
+static bool ggc_update_default_selb_phase_tuning_cnt(struct sdhci_host *host, int selb,
+					      int tuning_cnt)
+{
+	struct ggc_reg_op gg_reg_arr[3];
+	u8 data[512];
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	get_gg_reg_cur_val(ggc, data, 64);
+
+	pr_debug("BHT MSG: selb:%xh,tuning_cnt:%xh\n", selb,
+		 tuning_cnt);
+	memcpy(&gg_reg_arr[0], &ggc->dll_selb_100m_cfg,
+		sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[1], &ggc->dll_selb_200m_cfg,
+		sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[2], &ggc->cmd19_cnt_cfg,
+		sizeof(struct ggc_reg_op));
+
+	gg_reg_arr[0].value = selb;
+	gg_reg_arr[1].value = selb;
+	gg_reg_arr[2].value = tuning_cnt;
+	chg_gg_reg_cur_val(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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_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
+	ggc->ggc_sw_selb_tuning_first_selb = start;
+}
+
+static 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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_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)
+				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)
+				ggc->sdr50_notuning_crc_error_flag = 1;
+		}
+	} while (++phase < 16);
+
+kfree:
+	kfree(data_buf);
+
+	return rc;
+}
+
+static int get_config_sela_setting(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	if (is_bus_mode_sdr104(host))
+		return ggc->def_sela_200m;
+	else
+		return ggc->def_sela_100m;
+}
+
+static int get_config_selb_setting(struct sdhci_host *host)
+{
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	if (is_bus_mode_sdr104(host))
+		return ggc->def_selb_200m;
+	else
+		return ggc->def_selb_100m;
+}
+
+static int get_left_one_sel(int base)
+{
+	if (base == 0)
+		return 0xa;
+	else
+		return base - 1;
+}
+
+static int get_right_one_sel(int base)
+{
+	if (base == 0xa)
+		return 0x0;
+	else
+		return base + 1;
+}
+
+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,
+				     TUNING_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, TUNING_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, TUNING_RING_IDX(i + 1))) {
+			return TUNING_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_TUNING_RING_IDX_VALUE(get_left_one_sel
+						     (zero_start));
+		zero_end = ggc_get_01case_0_index(sel);
+		sel &=
+		    ~GENERATE_TUNING_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_TUNING_RING_IDX_VALUE(get_right_one_sel
+							     (i));
+			tx_selb &=
+			    ~GENERATE_TUNING_RING_IDX_VALUE(get_left_one_sel
+							     (i));
+
+			break;
+		case 2:
+			i = ggc_get_10case_0_index(tx_selb);
+			tx_selb &=
+			    ~GENERATE_TUNING_RING_IDX_VALUE(get_left_one_sel
+							     (i));
+			i = ggc_get_01case_0_index(tx_selb);
+			tx_selb &=
+			    ~GENERATE_TUNING_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_TUNING_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;
+}
+
+static void tx_selb_inject_policy(struct sdhci_host *host, int tx_selb)
+{
+
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	pr_debug("BHT MSG:before inject, failed ragen 0x%x, tx_selb 0x%x\n",
+			ggc->ggc_cmd_tx_selb_failed_range, tx_selb);
+	ggc->ggc_cmd_tx_selb_failed_range =
+		_tx_selb_inject_policy(tx_selb, ggc->ggc_cmd_tx_selb_failed_range);
+	tx_selb_failed_history_update(host, ggc->ggc_cmd_tx_selb_failed_range);
+	pr_debug("BHT MSG:after inject %xh range:%xh\n", tx_selb,
+		 ggc->ggc_cmd_tx_selb_failed_range);
+	if (is_bus_mode_sdr104(host))
+		ggc->sdr104.fail_phase = ggc->ggc_cmd_tx_selb_failed_range;
+	else
+		ggc->sdr50.fail_phase = ggc->ggc_cmd_tx_selb_failed_range;
+}
+
+static 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;
+}
+
+static 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 TUNING_RING_IDX(base + TUNING_PHASE_SIZE - 1);
+}
+
+static 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 = TUNING_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 = TUNING_RING_IDX(selb_mode);
+	}
+	if (pmax_pass_win)
+		*pmax_pass_win = tuning_pass_num_max;
+
+	return selb_mode;
+}
+
+
+static 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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+	u32 inj_tx_selb = BIT_PASS_MASK;
+
+	if (selx_failure_point_exist(ggc->ggc_cmd_tx_selb_failed_range)) {
+		selb = 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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	get_gg_reg_cur_val(ggc, data, 64);
+	cnt = (int)cfg_read_bits_ofs_mask(data, &ggc->cmd19_cnt_cfg);
+
+	pr_debug("BHT MSG:tuning cnt=%d\n", cnt);
+	return cnt;
+}
+
+static 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 ggc_reg_op gg_reg_arr[10];
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+	u32 i = 0;
+	u32 reg;
+
+	pr_debug("BHT MSG:%s sel200:%xh,sel100:%xh\n", __func__, sel200, sel100);
+	get_gg_reg_cur_val(ggc, data, 64);
+	memcpy(&gg_reg_arr[0], &ggc->inject_failure_for_tuning_enable_cfg,
+				sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[1], &ggc->inject_failure_for_200m_tuning_cfg,
+				sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[2], &ggc->inject_failure_for_100m_tuning_cfg,
+				sizeof(struct ggc_reg_op));
+	gg_reg_arr[0].value = 1;
+	gg_reg_arr[1].value = sel200;
+	gg_reg_arr[2].value = sel100;
+
+	chg_gg_reg_cur_val(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;
+}
+
+static 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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	ret = ggc_hw_inject_ext(host, &card_status, ggc->ggc_cmd_tx_selb_failed_range,
+			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(ggc->ggc_sw_selb_tuning_first_selb);
+		tx_selb_inject_policy(host, selb);
+		_ggc_update_cur_setting_for_sw_selb_tuning(host,
+			ggc->ggc_cmd_tx_selb_failed_range);
+
+		if (((11 - get_bit_number(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,
+			ggc->ggc_cmd_tx_selb_failed_range,
+			ggc->ggc_cmd_tx_selb_failed_range, max_recur, writetobh201);
+		else
+			return false;
+	} else
+		return true;
+}
+
+static 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);
+}
+
+static 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;
+}
+
+static 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 ggc_reg_op gg_reg_arr[8] = {{0}};
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_msm_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+
+	memcpy(&gg_reg_arr[0], &ggc->pha_stas_tx_low32,
+		sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[1], &ggc->pha_stas_tx_high32,
+		sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[2], &ggc->pha_stas_rx_low32,
+		sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[3], &ggc->pha_stas_rx_high32,
+		sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[4], &ggc->dll_sela_after_mask,
+		sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[5], &ggc->dll_selb_after_mask,
+		sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[6], &ggc->dll_delay_100m_backup,
+		sizeof(struct ggc_reg_op));
+	memcpy(&gg_reg_arr[7], &ggc->dll_delay_200m_backup,
+		sizeof(struct ggc_reg_op));
+
+	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;
+}
+
+static 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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	int selb;
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+	enum tuning_state *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_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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+	enum tuning_state *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;
+	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 = ggc->ggc_cur_sela;
+		cur_selb = 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
+					(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");
+				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)
+				&& ggc->sdr50_notuning_sela_inject_flag == 1
+				&& !GET_IDX_VALUE(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(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");
+			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(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");
+
+				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(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,
+						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)
+				&& 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);
+			ggc->sdr50_notuning_sela_rx_inject &= ~fp;
+			ggc->sdr50_notuning_sela_inject_flag = 1;
+			pr_debug("BHT MSG:sdr50_notuning_sela_rx_inject:%x\n",
+						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;
+
+	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_host *vendor_host = sdhci_pltfm_priv(pltfm_host);
+	struct sdhci_bht_host *ggc = sdhci_msm_priv(vendor_host);
+	u8 tw = 0;
+	int ret = 0;
+
+	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 (ggc->tuning_in_progress) {
+		pr_debug("BHT MSG:tuning_in_progress\n");
+		return 0;
+	}
+	ggc->tuning_in_progress = true;
+
+	if (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);
+	}
+	ggc->tuning_in_progress = false;
+	return ret;
+}
-- 
2.32.0