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Commit 5d0acd92 authored by Pratham Pratap's avatar Pratham Pratap
Browse files

usb: phy-msm-qusb-v2: Override PHY registers based on SoC Version 



This change sets HSTX_TRIM[3] bit and overrides DEBUG_CTRL1
value to 0x09 based on SoC Version for SDM670 1.1 which is
needed to enable Host mode chirp fix.

Change-Id: Ib9cf883364ccf9766c2cc4b3301c4167f4de449b
Signed-off-by: default avatarPratham Pratap <prathampratap@codeaurora.org>
parent 901d889a

Documentation/devicetree/bindings/usb/msm-phy.txt

+1 −0
Original line number Diff line number Diff line
@@ -186,6 +186,7 @@ Optional properties: 
   state when attached in host mode and "suspend" state when detached.

 - qcom,tune2-efuse-correction: The value to be adjusted from fused value for

   improved rise/fall times.

 - qcom,host-chirp-erratum: Indicates host chirp fix is required.

 - nvmem-cells: specifies the handle to represent the SoC revision.

   usually it is defined by qfprom device node.

 - nvmem-cell-names: specifies the given nvmem cell name as defined in

drivers/usb/phy/phy-msm-qusb-v2.c

+17 −5
Original line number Diff line number Diff line
@@ -71,6 +71,7 @@ 
#define SQ_CTRL1_CHIRP_DISABLE		0x20

#define SQ_CTRL2_CHIRP_DISABLE		0x80



#define PORT_TUNE1_OVERRIDE_VAL		0xc5

#define DEBUG_CTRL1_OVERRIDE_VAL	0x09



/* PERIPH_SS_PHY_REFGEN_NORTH_BG_CTRL register bits */
@@ -151,6 +152,7 @@ struct qusb_phy { 


	struct hrtimer		timer;

	int			soc_min_rev;

	bool			host_chirp_erratum;

};



#ifdef CONFIG_NVMEM
@@ -198,6 +200,9 @@ static long qfprom_read(struct device *dev, const char *name) 
/* Reads the SoC version */

static int qusb_phy_get_socrev(struct device *dev, struct qusb_phy *qphy)

{

	if (!qphy->host_chirp_erratum)

		return 0;



	qphy->soc_min_rev  = qfprom_read(dev, "minor_rev");

	if (qphy->soc_min_rev < 0)

		dev_err(dev, "failed getting soc_min_rev, err : %d\n",
@@ -475,6 +480,15 @@ static void qusb_phy_host_init(struct usb_phy *phy) 
	qusb_phy_write_seq(qphy->base, qphy->qusb_phy_host_init_seq,

			qphy->host_init_seq_len, 0);



	/* If soc revision is mentioned and host_chirp_erratum flag is set

	 * then override TUNE1 and DEBUG_CTRL1

	 */

	if (qphy->soc_min_rev && qphy->host_chirp_erratum) {

		writel_relaxed(PORT_TUNE1_OVERRIDE_VAL,

				qphy->base + qphy->phy_reg[PORT_TUNE1]);

		writel_relaxed(DEBUG_CTRL1_OVERRIDE_VAL,

				qphy->base + qphy->phy_reg[DEBUG_CTRL1]);

	}

	/* Ensure above write is completed before turning ON ref clk */

	wmb();
@@ -560,11 +574,6 @@ static int qusb_phy_init(struct usb_phy *phy) 
			writel_relaxed(BIAS_CTRL_2_OVERRIDE_VAL,

				qphy->base + qphy->phy_reg[BIAS_CTRL_2]);



	/* if soc revision is mentioned override DEBUG_CTRL1 value */

	if (qphy->soc_min_rev)

		writel_relaxed(DEBUG_CTRL1_OVERRIDE_VAL,

				qphy->base + qphy->phy_reg[DEBUG_CTRL1]);



	/* ensure above writes are completed before re-enabling PHY */

	wmb();
@@ -1170,6 +1179,9 @@ static int qusb_phy_probe(struct platform_device *pdev) 
			return -ENOMEM;

	}



	qphy->host_chirp_erratum = of_property_read_bool(dev->of_node,

					"qcom,host-chirp-erratum");



	ret = of_property_read_u32_array(dev->of_node, "qcom,vdd-voltage-level",

					 (u32 *) qphy->vdd_levels,

					 ARRAY_SIZE(qphy->vdd_levels));