Merge "usb: phy-msm-qusb: Support low power mode" (3c24c3a2) · Commits · e / devices / android_kernel_sony_msm8994

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

+40 −17

Original line number	Diff line number	Diff line
		@@ -23,6 +23,7 @@
		#include <linux/platform_device.h>
		#include <linux/regulator/consumer.h>
		#include <linux/usb/phy.h>
		#include <linux/usb/msm_hsusb.h>

		#define QUSB2PHY_PORT_POWERDOWN 0xB4
		#define CLAMP_N_EN BIT(5)
		@@ -34,6 +35,13 @@
		#define QUSB2PHY_PORT_TUNE3 0x88
		#define QUSB2PHY_PORT_TUNE4 0x8C

		#define QUSB2PHY_PORT_INTR_CTRL 0xBC
		#define CHG_DET_INTR_EN BIT(4)
		#define DMSE_INTR_HIGH_SEL BIT(3)
		#define DMSE_INTR_EN BIT(2)
		#define DPSE_INTR_HIGH_SEL BIT(1)
		#define DPSE_INTR_EN BIT(0)

		#define UTMI_OTG_VBUS_VALID BIT(20)
		#define SW_SESSVLD_SEL BIT(28)

		@@ -246,6 +254,7 @@ static void qusb_write_readback(void *base, u32 offset,
		static int qusb_phy_set_suspend(struct usb_phy *phy, int suspend)
		{
		struct qusb_phy *qphy = container_of(phy, struct qusb_phy, phy);
		u32 intr_mask = 0;

		if (!qphy->clocks_enabled) {
		dev_dbg(phy->dev, "clocks not enabled yet\n");
		@@ -259,26 +268,44 @@ static int qusb_phy_set_suspend(struct usb_phy *phy, int suspend)
		}

		if (suspend) {
		/* Suspend case */
		if (qphy->cable_connected) {
		return -EAGAIN;
		/* Bus suspend case */
		if (qphy->cable_connected \|\|
		(qphy->phy.flags & PHY_HOST_MODE)) {
		/* Clear all interrupts */
		writel_relaxed(0x00,
		qphy->base + QUSB2PHY_PORT_INTR_CTRL);

		/* Enable D+ interrupt */
		intr_mask \|= DPSE_INTR_EN;

		/* Select D+ falling edge as the trigger */
		intr_mask &= ~DPSE_INTR_HIGH_SEL;

		writel_relaxed(intr_mask,
		qphy->base + QUSB2PHY_PORT_INTR_CTRL);

		clk_disable_unprepare(qphy->cfg_ahb_clk);
		clk_disable_unprepare(qphy->ref_clk);
		} else { /* Disconnect case */
		/* Disable the PHY */
		writel_relaxed(CLAMP_N_EN \| FREEZIO_N \| POWER_DOWN,
		qphy->base + QUSB2PHY_PORT_POWERDOWN);
		clk_disable_unprepare(qphy->cfg_ahb_clk);
		clk_disable_unprepare(qphy->ref_clk);
		qusb_phy_enable_power(qphy, false);
		}
		qphy->suspended = true;
		} else {
		/* Bus suspend case */
		if (qphy->cable_connected \|\|
		(qphy->phy.flags & PHY_HOST_MODE)) {
		clk_prepare_enable(qphy->ref_clk);
		clk_prepare_enable(qphy->cfg_ahb_clk);
		/* Clear all interrupts on resume */
		writel_relaxed(0x00,
		qphy->base + QUSB2PHY_PORT_INTR_CTRL);
		} else {
		qusb_phy_enable_power(qphy, true);
		clk_prepare_enable(qphy->ref_clk);
		clk_prepare_enable(qphy->cfg_ahb_clk);
		/* Enable the PHY */
		writel_relaxed(CLAMP_N_EN \| FREEZIO_N,
		qphy->base + QUSB2PHY_PORT_POWERDOWN);
		/* Caller needs to call qusb_phy_init to apply tuning params */
		}
		qphy->suspended = false;
		}

		@@ -411,10 +438,6 @@ static int qusb_phy_probe(struct platform_device *pdev)
		if (ret)
		return ret;

		clk_prepare_enable(qphy->ref_clk);
		clk_prepare_enable(qphy->cfg_ahb_clk);
		qphy->clocks_enabled = true;

		platform_set_drvdata(pdev, qphy);

		qphy->phy.label = "msm-qusb-phy";