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Commit 642d0ba7 authored by Ram Prakash Gupta's avatar Ram Prakash Gupta
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phy: ufs: Add UFS PHY support for yupik 



Add UFS PHY support for yupik.

Change-Id: I852f44c475e2d7d62cd089865210efd3510fe678
Signed-off-by: default avatarRam Prakash Gupta <rampraka@codeaurora.org>
parent 5f5ad727

drivers/phy/qualcomm/Makefile

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@@ -6,7 +6,7 @@ obj-$(CONFIG_PHY_QCOM_PCIE2) += phy-qcom-pcie2.o 
obj-$(CONFIG_PHY_QCOM_QMP)		+= phy-qcom-qmp.o

obj-$(CONFIG_PHY_QCOM_QUSB2)		+= phy-qcom-qusb2.o

obj-$(CONFIG_PHY_QCOM_UFS)		+= phy-qcom-ufs.o

obj-$(CONFIG_PHY_QCOM_UFS_V4)		+= phy-qcom-ufs-qmp-v4-lahaina.o phy-qcom-ufs-qmp-v4.o

obj-$(CONFIG_PHY_QCOM_UFS_V4)		+= phy-qcom-ufs-qmp-v4-yupik.o phy-qcom-ufs-qmp-v4-lahaina.o phy-qcom-ufs-qmp-v4.o

obj-$(CONFIG_PHY_QCOM_UFS_V3)           += phy-qcom-ufs-qmp-v3.o

obj-$(CONFIG_PHY_QCOM_UFS_14NM)		+= phy-qcom-ufs-qmp-14nm.o

obj-$(CONFIG_PHY_QCOM_UFS_20NM)		+= phy-qcom-ufs-qmp-20nm.o

drivers/phy/qualcomm/phy-qcom-ufs-qmp-v4-yupik.c

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// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (c) 2019-2021, Linux Foundation. All rights reserved.

 */



#include "phy-qcom-ufs-qmp-v4-yupik.h"



#define UFS_PHY_NAME "ufs_phy_qmp_v4_yupik"



static inline void ufs_qcom_phy_qmp_v4_start_serdes(struct ufs_qcom_phy *phy);

static int ufs_qcom_phy_qmp_v4_is_pcs_ready(struct ufs_qcom_phy *phy_common);



static int ufs_qcom_phy_qmp_v4_phy_calibrate(struct phy *generic_phy)

{

	struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(generic_phy);

	struct device *dev = ufs_qcom_phy->dev;

	bool is_g4, is_rate_B;

	int err;



	err = reset_control_assert(ufs_qcom_phy->ufs_reset);

	if (err) {

		dev_err(dev, "Failed to assert UFS PHY reset %d\n", err);

		goto out;

	}



	/* For UFS PHY's submode, 1 = G4, 0 = non-G4 */

	is_g4 = !!ufs_qcom_phy->submode;

	is_rate_B = (ufs_qcom_phy->mode == PHY_MODE_UFS_HS_B) ? true : false;



	writel_relaxed(0x01, ufs_qcom_phy->mmio + UFS_PHY_SW_RESET);

	/* Ensure PHY is in reset before writing PHY calibration data */

	wmb();

	/*

	 * Writing PHY calibration in this order:

	 * 1. Write Rate-A calibration first (1-lane mode).

	 * 2. Write 2nd lane configuration if needed.

	 * 3. Write Rate-B calibration overrides

	 */

	if (is_g4) {

		ufs_qcom_phy_write_tbl(ufs_qcom_phy, phy_cal_table_rate_A,

				       ARRAY_SIZE(phy_cal_table_rate_A));

		if (ufs_qcom_phy->lanes_per_direction == 2)

			ufs_qcom_phy_write_tbl(ufs_qcom_phy,

					phy_cal_table_2nd_lane,

					ARRAY_SIZE(phy_cal_table_2nd_lane));

	} else {

		ufs_qcom_phy_write_tbl(ufs_qcom_phy, phy_cal_table_rate_A_no_g4,

				       ARRAY_SIZE(phy_cal_table_rate_A_no_g4));

		if (ufs_qcom_phy->lanes_per_direction == 2)

			ufs_qcom_phy_write_tbl(ufs_qcom_phy,

				      phy_cal_table_2nd_lane_no_g4,

				      ARRAY_SIZE(phy_cal_table_2nd_lane_no_g4));

	}

	if (is_rate_B)

		ufs_qcom_phy_write_tbl(ufs_qcom_phy, phy_cal_table_rate_B,

				       ARRAY_SIZE(phy_cal_table_rate_B));



	writel_relaxed(0x00, ufs_qcom_phy->mmio + UFS_PHY_SW_RESET);

	/* flush buffered writes */

	wmb();



	err = reset_control_deassert(ufs_qcom_phy->ufs_reset);

	if (err) {

		dev_err(dev, "Failed to deassert UFS PHY reset %d\n", err);

		goto out;

	}



	ufs_qcom_phy_qmp_v4_start_serdes(ufs_qcom_phy);



	err = ufs_qcom_phy_qmp_v4_is_pcs_ready(ufs_qcom_phy);



out:

	return err;

}



static int ufs_qcom_phy_qmp_v4_init(struct phy *generic_phy)

{

	struct ufs_qcom_phy_qmp_v4 *phy = phy_get_drvdata(generic_phy);

	struct ufs_qcom_phy *phy_common = &phy->common_cfg;

	int err;



	err = ufs_qcom_phy_init_clks(phy_common);

	if (err) {

		dev_err(phy_common->dev, "%s: ufs_qcom_phy_init_clks() failed %d\n",

			__func__, err);

		goto out;

	}



	err = ufs_qcom_phy_init_vregulators(phy_common);

	if (err) {

		dev_err(phy_common->dev, "%s: ufs_qcom_phy_init_vregulators() failed %d\n",

			__func__, err);

		goto out;

	}



	/* Optional */

	ufs_qcom_phy_get_reset(phy_common);



out:

	return err;

}



static int ufs_qcom_phy_qmp_v4_exit(struct phy *generic_phy)

{

	return 0;

}



static

int ufs_qcom_phy_qmp_v4_set_mode(struct phy *generic_phy,

				   enum phy_mode mode, int submode)

{

	struct ufs_qcom_phy *phy_common = get_ufs_qcom_phy(generic_phy);



	phy_common->mode = PHY_MODE_INVALID;



	if (mode > 0)

		phy_common->mode = mode;



	phy_common->submode = submode;



	return 0;

}



static inline

void ufs_qcom_phy_qmp_v4_tx_pull_down_ctrl(struct ufs_qcom_phy *phy,

						bool enable)

{

	u32 temp;



	temp = readl_relaxed(phy->mmio + QSERDES_RX0_RX_INTERFACE_MODE);

	if (enable)

		temp |= QSERDES_RX_INTERFACE_MODE_CLOCK_EDGE_BIT;

	else

		temp &= ~QSERDES_RX_INTERFACE_MODE_CLOCK_EDGE_BIT;

	writel_relaxed(temp, phy->mmio + QSERDES_RX0_RX_INTERFACE_MODE);



	if (phy->lanes_per_direction == 1)

		goto out;



	temp = readl_relaxed(phy->mmio + QSERDES_RX1_RX_INTERFACE_MODE);

	if (enable)

		temp |= QSERDES_RX_INTERFACE_MODE_CLOCK_EDGE_BIT;

	else

		temp &= ~QSERDES_RX_INTERFACE_MODE_CLOCK_EDGE_BIT;

	writel_relaxed(temp, phy->mmio + QSERDES_RX1_RX_INTERFACE_MODE);



out:

	/* ensure register value is committed */

	mb();

}



static

void ufs_qcom_phy_qmp_v4_power_control(struct ufs_qcom_phy *phy,

					 bool power_ctrl)

{

	if (!power_ctrl) {

		/* apply analog power collapse */

		writel_relaxed(0x0, phy->mmio + UFS_PHY_POWER_DOWN_CONTROL);

		/*

		 * Make sure that PHY knows its analog rail is going to be

		 * powered OFF.

		 */

		mb();

		ufs_qcom_phy_qmp_v4_tx_pull_down_ctrl(phy, true);

	} else {

		ufs_qcom_phy_qmp_v4_tx_pull_down_ctrl(phy, false);

		/* bring PHY out of analog power collapse */

		writel_relaxed(0x1, phy->mmio + UFS_PHY_POWER_DOWN_CONTROL);



		/*

		 * Before any transactions involving PHY, ensure PHY knows

		 * that it's analog rail is powered ON.

		 */

		mb();

	}

}



static inline

void ufs_qcom_phy_qmp_v4_set_tx_lane_enable(struct ufs_qcom_phy *phy, u32 val)

{

	/*

	 * v4 PHY does not have TX_LANE_ENABLE register.

	 * Implement this function so as not to propagate error to caller.

	 */

}



static

void ufs_qcom_phy_qmp_v4_ctrl_rx_linecfg(struct ufs_qcom_phy *phy, bool ctrl)

{

	u32 temp;



	temp = readl_relaxed(phy->mmio + UFS_PHY_LINECFG_DISABLE);



	if (ctrl) /* enable RX LineCfg */

		temp &= ~UFS_PHY_RX_LINECFG_DISABLE_BIT;

	else /* disable RX LineCfg */

		temp |= UFS_PHY_RX_LINECFG_DISABLE_BIT;



	writel_relaxed(temp, phy->mmio + UFS_PHY_LINECFG_DISABLE);

	/* make sure that RX LineCfg config applied before we return */

	mb();

}



static inline void ufs_qcom_phy_qmp_v4_start_serdes(struct ufs_qcom_phy *phy)

{

	u32 tmp;



	tmp = readl_relaxed(phy->mmio + UFS_PHY_PHY_START);

	tmp &= ~MASK_SERDES_START;

	tmp |= (1 << OFFSET_SERDES_START);

	writel_relaxed(tmp, phy->mmio + UFS_PHY_PHY_START);

	/* Ensure register value is committed */

	mb();

}



static int ufs_qcom_phy_qmp_v4_is_pcs_ready(struct ufs_qcom_phy *phy_common)

{

	int err = 0;

	u32 val;



	err = readl_poll_timeout(phy_common->mmio + UFS_PHY_PCS_READY_STATUS,

		val, (val & MASK_PCS_READY), 10, 1000000);

	if (err) {

		dev_err(phy_common->dev, "%s: poll for pcs failed err = %d\n",

			__func__, err);

	}



	return err;

}





static void ufs_qcom_phy_qmp_v4_dbg_register_dump(struct ufs_qcom_phy *phy)

{

	ufs_qcom_phy_dump_regs(phy, COM_BASE, COM_SIZE,

					"PHY QSERDES COM Registers ");

	ufs_qcom_phy_dump_regs(phy, PCS2_BASE, PCS2_SIZE,

					"PHY PCS2 Registers ");

	ufs_qcom_phy_dump_regs(phy, PHY_BASE, PHY_SIZE,

					"PHY Registers ");

	ufs_qcom_phy_dump_regs(phy, RX_BASE(0), RX_SIZE,

					"PHY RX0 Registers ");

	ufs_qcom_phy_dump_regs(phy, TX_BASE(0), TX_SIZE,

					"PHY TX0 Registers ");

	ufs_qcom_phy_dump_regs(phy, RX_BASE(1), RX_SIZE,

					"PHY RX1 Registers ");

	ufs_qcom_phy_dump_regs(phy, TX_BASE(1), TX_SIZE,

					"PHY TX1 Registers ");

}



static const struct phy_ops ufs_qcom_phy_qmp_v4_phy_ops = {

	.init		= ufs_qcom_phy_qmp_v4_init,

	.exit		= ufs_qcom_phy_qmp_v4_exit,

	.power_on	= ufs_qcom_phy_power_on,

	.power_off	= ufs_qcom_phy_power_off,

	.set_mode	= ufs_qcom_phy_qmp_v4_set_mode,

	.calibrate	= ufs_qcom_phy_qmp_v4_phy_calibrate,

	.owner		= THIS_MODULE,

};



static struct ufs_qcom_phy_specific_ops phy_v4_ops = {

	.start_serdes		= ufs_qcom_phy_qmp_v4_start_serdes,

	.is_physical_coding_sublayer_ready = ufs_qcom_phy_qmp_v4_is_pcs_ready,

	.set_tx_lane_enable	= ufs_qcom_phy_qmp_v4_set_tx_lane_enable,

	.ctrl_rx_linecfg	= ufs_qcom_phy_qmp_v4_ctrl_rx_linecfg,

	.power_control		= ufs_qcom_phy_qmp_v4_power_control,

	.dbg_register_dump	= ufs_qcom_phy_qmp_v4_dbg_register_dump,

};



static int ufs_qcom_phy_qmp_v4_probe(struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;

	struct phy *generic_phy;

	struct ufs_qcom_phy_qmp_v4 *phy;

	int err = 0;



	phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);

	if (!phy) {

		err = -ENOMEM;

		goto out;

	}



	generic_phy = ufs_qcom_phy_generic_probe(pdev, &phy->common_cfg,

				&ufs_qcom_phy_qmp_v4_phy_ops, &phy_v4_ops);



	if (!generic_phy) {

		dev_err(dev, "%s: ufs_qcom_phy_generic_probe() failed\n",

			__func__);

		err = -EIO;

		goto out;

	}



	phy_set_drvdata(generic_phy, phy);



	strlcpy(phy->common_cfg.name, UFS_PHY_NAME,

		sizeof(phy->common_cfg.name));



out:

	return err;

}



static const struct of_device_id ufs_qcom_phy_qmp_v4_of_match[] = {

	{.compatible = "qcom,ufs-phy-qmp-v4-yupik"},

	{},

};

MODULE_DEVICE_TABLE(of, ufs_qcom_phy_qmp_v4_of_match);



static struct platform_driver ufs_qcom_phy_qmp_v4_driver = {

	.probe = ufs_qcom_phy_qmp_v4_probe,

	.driver = {

		.of_match_table = ufs_qcom_phy_qmp_v4_of_match,

		.name = "ufs_qcom_phy_qmp_v4_yupik",

	},

};



module_platform_driver(ufs_qcom_phy_qmp_v4_driver);



MODULE_DESCRIPTION("Universal Flash Storage (UFS) QCOM PHY QMP v4 yupik");

MODULE_LICENSE("GPL v2");

drivers/phy/qualcomm/phy-qcom-ufs-qmp-v4-yupik.h

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