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Commit be43b9f1 authored by Hemant Kumar's avatar Hemant Kumar
Browse files

usb: phy-msm-hsusb: Add support to vote for 3.15 V in Host mode 



Some of SNPS USB2 picoPhy revisions do not operate correctly
during full speed host mode at subzero temperature. Work around
this issue by increasing the maximum allowed PM8994 LDO 24 voltage
from 3.05 V to 3.15 V for phy analog 3.3 voltage domain.

CRs-Fixed: 705190
Change-Id: Ie8b13fe34faa4bc6811ab8ccaab7aea5b53b29a2
Signed-off-by: default avatarHemant Kumar <hemantk@codeaurora.org>
parent 34ac2ac6

drivers/usb/dwc3/dwc3_otg.c

+2 −0
Original line number Diff line number Diff line
@@ -90,6 +90,7 @@ static int dwc3_otg_start_host(struct usb_otg *otg, int on) 
		dev_dbg(otg->phy->dev, "%s: turn on host\n", __func__);



		dwc3_otg_notify_host_mode(otg, on);

		usb_phy_notify_connect(dotg->dwc->usb2_phy, USB_SPEED_HIGH);

		ret = regulator_enable(dotg->vbus_otg);

		if (ret) {

			dev_err(otg->phy->dev, "unable to enable vbus_otg\n");
@@ -136,6 +137,7 @@ static int dwc3_otg_start_host(struct usb_otg *otg, int on) 


		dbg_event(0xFF, "StHost get", 0);

		pm_runtime_get(dwc->dev);

		usb_phy_notify_disconnect(dotg->dwc->usb2_phy, USB_SPEED_HIGH);

		dwc3_otg_notify_host_mode(otg, on);

		dwc3_otg_set_host(otg, NULL);

		platform_device_del(dwc->xhci);

drivers/usb/phy/phy-msm-hsusb.c

+31 −3
Original line number Diff line number Diff line
@@ -35,7 +35,8 @@ MODULE_PARM_DESC(override_phy_init, "Override HSPHY Init Seq"); 


/* QSCRATCH register settings differ based on MSM core ver */

#define MSM_CORE_VER_120		0x10020061



#define MSM_CORE_VER_160		0x10060000

#define MSM_CORE_VER_161		0x10060001



/* QSCRATCH register offsets */

#define GENERAL_CFG_REG			(0x08)
@@ -108,6 +109,7 @@ MODULE_PARM_DESC(override_phy_init, "Override HSPHY Init Seq"); 
#define USB_HSPHY_3P3_VOL_MIN			3050000 /* uV */

#define USB_HSPHY_3P3_VOL_MAX			3300000 /* uV */

#define USB_HSPHY_3P3_HPM_LOAD			16000	/* uA */

#define USB_HSPHY_3P3_VOL_FSHOST		3150000 /* uV */



#define USB_HSPHY_1P8_VOL_MIN			1800000 /* uV */

#define USB_HSPHY_1P8_VOL_MAX			1800000 /* uV */
@@ -542,12 +544,27 @@ static int msm_hsphy_set_suspend(struct usb_phy *uphy, int suspend) 
static int msm_hsphy_notify_connect(struct usb_phy *uphy,

				    enum usb_device_speed speed)

{

	int rc = 0;

	struct msm_hsphy *phy = container_of(uphy, struct msm_hsphy, phy);



	phy->cable_connected = true;



	if (uphy->flags & PHY_HOST_MODE)

	if (uphy->flags & PHY_HOST_MODE) {

		if (phy->core_ver == MSM_CORE_VER_160 ||

			phy->core_ver == MSM_CORE_VER_161) {

			/* Some snps usb2 picophy revisions require 3.15 V to

			 * operate correctly during full speed host mode at

			 * sub zero temperature.

			 */

			rc = regulator_set_voltage(phy->vdda33,

					USB_HSPHY_3P3_VOL_FSHOST,

					USB_HSPHY_3P3_VOL_MAX);

			if (rc)

				dev_err(phy->phy.dev,

					"unable to set voltage for vdda33\n");

		}

		return 0;

	}



	if (!(uphy->flags & PHY_VBUS_VALID_OVERRIDE))

		return 0;
@@ -584,12 +601,23 @@ static int msm_hsphy_notify_connect(struct usb_phy *uphy, 
static int msm_hsphy_notify_disconnect(struct usb_phy *uphy,

				       enum usb_device_speed speed)

{

	int rc = 0;

	struct msm_hsphy *phy = container_of(uphy, struct msm_hsphy, phy);



	phy->cable_connected = false;



	if (uphy->flags & PHY_HOST_MODE)

	if (uphy->flags & PHY_HOST_MODE) {

		if (phy->core_ver == MSM_CORE_VER_160 ||

			phy->core_ver == MSM_CORE_VER_161) {

			rc = regulator_set_voltage(phy->vdda33,

					USB_HSPHY_3P3_VOL_MIN,

					USB_HSPHY_3P3_VOL_MAX);

			if (rc)

				dev_err(phy->phy.dev,

					"unable to set voltage for vdda33\n");

		}

		return 0;

	}



	if (!(uphy->flags & PHY_VBUS_VALID_OVERRIDE))

		return 0;