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Commit 3e583e6c authored by Mayank Rana's avatar Mayank Rana Committed by Gerrit - the friendly Code Review server
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usb: phy: Reset and initialize HSPHY in host mode when EUD is enable 



EUD HUB functionality is relevant into USB device mode only. Hence when
using USB host mode, continue performing reset and initialization
functionality with HSPHY even though EUD is enable. If EUD is enable
while starting host mode, re-enable EUD whie exiting host mode.

Change-Id: Ifc2a105d8a02511dd2fc58be5fbc788d46546ba0
Signed-off-by: default avatarMayank Rana <mrana@codeaurora.org>
parent 732a1ae2

drivers/usb/dwc3/dwc3-msm.c

+2 −2
Original line number Diff line number Diff line
@@ -4582,11 +4582,11 @@ static int dwc3_otg_start_host(struct dwc3_msm *mdwc, int on) 


	if (on) {

		dev_dbg(mdwc->dev, "%s: turn on host\n", __func__);



		mdwc->hs_phy->flags |= PHY_HOST_MODE;

		dbg_event(0xFF, "hs_phy_flag:%x", mdwc->hs_phy->flags);

		pm_runtime_get_sync(mdwc->dev);

		dbg_event(0xFF, "StrtHost gync",

			atomic_read(&mdwc->dev->power.usage_count));

		mdwc->hs_phy->flags |= PHY_HOST_MODE;

		if (dwc->maximum_speed >= USB_SPEED_SUPER) {

			mdwc->ss_phy->flags |= PHY_HOST_MODE;

			usb_phy_notify_connect(mdwc->ss_phy,

drivers/usb/phy/phy-msm-snps-hs.c

+29 −8
Original line number Diff line number Diff line
@@ -21,6 +21,8 @@ 
#include <linux/usb/dwc3-msm.h>

#include <linux/reset.h>

#include <linux/debugfs.h>

#include <linux/qcom_scm.h>

#include <linux/types.h>



#define USB2_PHY_USB_PHY_UTMI_CTRL0		(0x3c)

#define OPMODE_MASK				(0x3 << 3)
@@ -82,7 +84,9 @@ 
struct msm_hsphy {

	struct usb_phy		phy;

	void __iomem		*base;

	phys_addr_t		eud_reg;

	void __iomem		*eud_enable_reg;

	bool			re_enable_eud;



	struct clk		*ref_clk_src;

	struct clk		*cfg_ahb_clk;
@@ -331,19 +335,29 @@ static void hsusb_phy_write_seq(void __iomem *base, u32 *seq, int cnt, 
	}

}



#define EUD_EN2 BIT(0)

static int msm_hsphy_init(struct usb_phy *uphy)

{

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

	int ret;

	u32 rcal_code = 0;



	dev_dbg(uphy->dev, "%s\n", __func__);



	if (phy->eud_enable_reg && readl_relaxed(phy->eud_enable_reg)) {

		dev_err(phy->phy.dev, "eud is enabled\n");

	u32 rcal_code = 0, eud_csr_reg = 0;



	dev_dbg(uphy->dev, "%s phy_flags:0x%x\n", __func__, phy->phy.flags);

	if (phy->eud_enable_reg) {

		eud_csr_reg = readl_relaxed(phy->eud_enable_reg);

		if (eud_csr_reg & EUD_EN2) {

			dev_dbg(phy->phy.dev, "csr:0x%x eud is enabled\n",

							eud_csr_reg);

			/* if in host mode, disable EUD */

			if (phy->phy.flags & PHY_HOST_MODE) {

				qcom_scm_io_writel(phy->eud_reg, 0x0);

				phy->re_enable_eud = true;

			} else {

				ret = msm_hsphy_enable_power(phy, true);

				return ret;

			}

		}

	}



	ret = msm_hsphy_enable_power(phy, true);

	if (ret)
@@ -486,6 +500,12 @@ static int msm_hsphy_set_suspend(struct usb_phy *uphy, int suspend) 
		} else {/* Cable disconnect */

			mutex_lock(&phy->phy_lock);

			dev_dbg(uphy->dev, "phy->flags:0x%x\n", phy->phy.flags);

			if (phy->re_enable_eud) {

				dev_dbg(uphy->dev, "re-enabling EUD\n");

				qcom_scm_io_writel(phy->eud_reg, 0x1);

				phy->re_enable_eud = false;

			}



			if (!phy->dpdm_enable) {

				if (!(phy->phy.flags & EUD_SPOOF_DISCONNECT)) {

					dev_dbg(uphy->dev, "turning off clocks/ldo\n");
@@ -703,6 +723,7 @@ static int msm_hsphy_probe(struct platform_device *pdev) 
			dev_err(dev, "err getting eud_enable_reg address\n");

			return PTR_ERR(phy->eud_enable_reg);

		}

		phy->eud_reg = res->start;

	}



	/* ref_clk_src is needed irrespective of SE_CLK or DIFF_CLK usage */