Merge "usb: gadget: Add snapshot of ChipIdea MSM driver" (5862240a) · Commits · e / devices / android_kernel_fairphone_FP3

drivers/usb/gadget/ci13xxx_msm.c

+187 −9

Original line number	Diff line number	Diff line
		/* Copyright (c) 2010-2013, The Linux Foundation. All rights reserved.
		/* Copyright (c) 2010-2018, The Linux Foundation. All rights reserved.
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 and
		@@ -11,6 +11,7 @@
		#include <linux/usb/msm_hsusb_hw.h>
		#include <linux/usb/ulpi.h>
		#include <linux/gpio.h>
		#include <linux/pinctrl/consumer.h>

		#include "ci13xxx_udc.c"

		@@ -24,9 +25,13 @@ struct ci13xxx_udc_context {
		int wake_gpio;
		int wake_irq;
		bool wake_irq_state;
		struct pinctrl *ci13xxx_pinctrl;
		struct timer_list irq_enable_timer;
		bool irq_disabled;
		};

		static struct ci13xxx_udc_context _udc_ctxt;
		#define IRQ_ENABLE_DELAY (jiffies + msecs_to_jiffies(1000))

		static irqreturn_t msm_udc_irq(int irq, void *data)
		{
		@@ -36,6 +41,7 @@ static irqreturn_t msm_udc_irq(int irq, void *data)
		static void ci13xxx_msm_suspend(void)
		{
		struct device *dev = _udc->gadget.dev.parent;

		dev_dbg(dev, "ci13xxx_msm_suspend\n");

		if (_udc_ctxt.wake_irq && !_udc_ctxt.wake_irq_state) {
		@@ -48,6 +54,7 @@ static void ci13xxx_msm_suspend(void)
		static void ci13xxx_msm_resume(void)
		{
		struct device *dev = _udc->gadget.dev.parent;

		dev_dbg(dev, "ci13xxx_msm_resume\n");

		if (_udc_ctxt.wake_irq && _udc_ctxt.wake_irq_state) {
		@@ -62,11 +69,27 @@ static void ci13xxx_msm_disconnect(void)
		struct ci13xxx *udc = _udc;
		struct usb_phy *phy = udc->transceiver;

		if (phy && (phy->flags & ENABLE_DP_MANUAL_PULLUP))
		if (phy && (phy->flags & ENABLE_DP_MANUAL_PULLUP)) {
		u32 temp;

		usb_phy_io_write(phy,
		ULPI_MISC_A_VBUSVLDEXT \|
		ULPI_MISC_A_VBUSVLDEXTSEL,
		ULPI_CLR(ULPI_MISC_A));

		/* Notify LINK of VBUS LOW */
		temp = readl_relaxed(USB_USBCMD);
		temp &= ~USBCMD_SESS_VLD_CTRL;
		writel_relaxed(temp, USB_USBCMD);

		/*
		* Add memory barrier as it is must to complete
		* above USB PHY and Link register writes before
		* moving ahead with USB peripheral mode enumeration,
		* otherwise USB peripheral mode may not work.
		*/
		mb();
		}
		}

		/* Link power management will reduce power consumption by
		@@ -102,9 +125,9 @@ static void ci13xxx_msm_connect(void)
		ULPI_MISC_A_VBUSVLDEXTSEL,
		ULPI_SET(ULPI_MISC_A));

		temp = readl_relaxed(USB_GENCONFIG2);
		temp \|= GENCFG2_SESS_VLD_CTRL_EN;
		writel_relaxed(temp, USB_GENCONFIG2);
		temp = readl_relaxed(USB_GENCONFIG_2);
		temp \|= GENCONFIG_2_SESS_VLD_CTRL_EN;
		writel_relaxed(temp, USB_GENCONFIG_2);

		temp = readl_relaxed(USB_USBCMD);
		temp \|= USBCMD_SESS_VLD_CTRL;
		@@ -125,10 +148,17 @@ static void ci13xxx_msm_reset(void)
		struct ci13xxx *udc = _udc;
		struct usb_phy *phy = udc->transceiver;
		struct device *dev = udc->gadget.dev.parent;
		int temp;

		writel_relaxed(0, USB_AHBBURST);
		writel_relaxed(0x08, USB_AHBMODE);

		/* workaround for rx buffer collision issue */
		temp = readl_relaxed(USB_GENCONFIG);
		temp &= ~GENCONFIG_TXFIFO_IDLE_FORCE_DISABLE;
		temp &= ~GENCONFIG_ULPI_SERIAL_EN;
		writel_relaxed(temp, USB_GENCONFIG);

		if (udc->gadget.l1_supported)
		ci13xxx_msm_set_l1(udc);

		@@ -149,7 +179,24 @@ static void ci13xxx_msm_reset(void)
		}
		}

		static void ci13xxx_msm_notify_event(struct ci13xxx *udc, unsigned event)
		static void ci13xxx_msm_mark_err_event(void)
		{
		struct ci13xxx *udc = _udc;
		struct msm_otg *otg;

		if (udc == NULL)
		return;

		if (udc->transceiver == NULL)
		return;

		otg = container_of(udc->transceiver, struct msm_otg, phy);

		/* This will trigger hardware reset before next connection */
		otg->err_event_seen = true;
		}

		static void ci13xxx_msm_notify_event(struct ci13xxx *udc, unsigned int event)
		{
		struct device *dev = udc->gadget.dev.parent;

		@@ -175,13 +222,36 @@ static void ci13xxx_msm_notify_event(struct ci13xxx *udc, unsigned event)
		dev_info(dev, "CI13XXX_CONTROLLER_RESUME_EVENT received\n");
		ci13xxx_msm_resume();
		break;

		case CI13XXX_CONTROLLER_ERROR_EVENT:
		dev_info(dev, "CI13XXX_CONTROLLER_ERROR_EVENT received\n");
		ci13xxx_msm_mark_err_event();
		break;
		case CI13XXX_CONTROLLER_UDC_STARTED_EVENT:
		dev_info(dev,
		"CI13XXX_CONTROLLER_UDC_STARTED_EVENT received\n");
		break;
		default:
		dev_dbg(dev, "unknown ci13xxx_udc event\n");
		break;
		}
		}

		static bool ci13xxx_msm_in_lpm(struct ci13xxx *udc)
		{
		struct msm_otg *otg;

		if (udc == NULL)
		return false;

		if (udc->transceiver == NULL)
		return false;

		otg = container_of(udc->transceiver, struct msm_otg, phy);

		return (atomic_read(&otg->in_lpm) != 0);
		}


		static irqreturn_t ci13xxx_msm_resume_irq(int irq, void *data)
		{
		struct ci13xxx *udc = _udc;
		@@ -200,10 +270,10 @@ static struct ci13xxx_udc_driver ci13xxx_msm_udc_driver = {
		CI13XXX_REQUIRE_TRANSCEIVER \|
		CI13XXX_PULLUP_ON_VBUS \|
		CI13XXX_ZERO_ITC \|
		CI13XXX_DISABLE_STREAMING \|
		CI13XXX_IS_OTG,
		CI13XXX_DISABLE_STREAMING,
		.nz_itc = 0,
		.notify_event = ci13xxx_msm_notify_event,
		.in_lpm = ci13xxx_msm_in_lpm,
		};

		static int ci13xxx_msm_install_wake_gpio(struct platform_device *pdev,
		@@ -211,10 +281,20 @@ static int ci13xxx_msm_install_wake_gpio(struct platform_device *pdev,
		{
		int wake_irq;
		int ret;
		struct pinctrl_state *set_state;

		dev_dbg(&pdev->dev, "ci13xxx_msm_install_wake_gpio\n");

		_udc_ctxt.wake_gpio = res->start;
		if (_udc_ctxt.ci13xxx_pinctrl) {
		set_state = pinctrl_lookup_state(_udc_ctxt.ci13xxx_pinctrl,
		"ci13xxx_active");
		if (IS_ERR(set_state)) {
		pr_err("cannot get ci13xxx pinctrl active state\n");
		return PTR_ERR(set_state);
		}
		pinctrl_select_state(_udc_ctxt.ci13xxx_pinctrl, set_state);
		}
		gpio_request(_udc_ctxt.wake_gpio, "USB_RESUME");
		gpio_direction_input(_udc_ctxt.wake_gpio);
		wake_irq = gpio_to_irq(_udc_ctxt.wake_gpio);
		@@ -238,20 +318,42 @@ static int ci13xxx_msm_install_wake_gpio(struct platform_device *pdev,

		gpio_free:
		gpio_free(_udc_ctxt.wake_gpio);
		if (_udc_ctxt.ci13xxx_pinctrl) {
		set_state = pinctrl_lookup_state(_udc_ctxt.ci13xxx_pinctrl,
		"ci13xxx_sleep");
		if (IS_ERR(set_state))
		pr_err("cannot get ci13xxx pinctrl sleep state\n");
		else
		pinctrl_select_state(_udc_ctxt.ci13xxx_pinctrl,
		set_state);
		}
		_udc_ctxt.wake_gpio = 0;
		return ret;
		}

		static void ci13xxx_msm_uninstall_wake_gpio(struct platform_device *pdev)
		{
		struct pinctrl_state *set_state;

		dev_dbg(&pdev->dev, "ci13xxx_msm_uninstall_wake_gpio\n");

		if (_udc_ctxt.wake_gpio) {
		gpio_free(_udc_ctxt.wake_gpio);
		if (_udc_ctxt.ci13xxx_pinctrl) {
		set_state =
		pinctrl_lookup_state(_udc_ctxt.ci13xxx_pinctrl,
		"ci13xxx_sleep");
		if (IS_ERR(set_state))
		pr_err("cannot get ci13xxx pinctrl sleep state\n");
		else
		pinctrl_select_state(_udc_ctxt.ci13xxx_pinctrl,
		set_state);
		}
		_udc_ctxt.wake_gpio = 0;
		}
		}

		static void enable_usb_irq_timer_func(unsigned long data);
		static int ci13xxx_msm_probe(struct platform_device *pdev)
		{
		struct resource *res;
		@@ -271,6 +373,15 @@ static int ci13xxx_msm_probe(struct platform_device *pdev)
		1 << (pdata->log2_itc-1);

		is_l1_supported = pdata->l1_supported;
		/* Set ahb2ahb bypass flag if it is requested. */
		if (pdata->enable_ahb2ahb_bypass)
		ci13xxx_msm_udc_driver.flags \|=
		CI13XXX_ENABLE_AHB2AHB_BYPASS;

		/* Clear disable streaming flag if is requested. */
		if (pdata->enable_streaming)
		ci13xxx_msm_udc_driver.flags &=
		~CI13XXX_DISABLE_STREAMING;
		}

		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		@@ -301,6 +412,17 @@ static int ci13xxx_msm_probe(struct platform_device *pdev)
		}

		res = platform_get_resource_byname(pdev, IORESOURCE_IO, "USB_RESUME");
		/* Get pinctrl if target uses pinctrl */
		_udc_ctxt.ci13xxx_pinctrl = devm_pinctrl_get(&pdev->dev);
		if (IS_ERR(_udc_ctxt.ci13xxx_pinctrl)) {
		if (of_property_read_bool(pdev->dev.of_node, "pinctrl-names")) {
		dev_err(&pdev->dev, "Error encountered while getting pinctrl");
		ret = PTR_ERR(_udc_ctxt.ci13xxx_pinctrl);
		goto udc_remove;
		}
		dev_dbg(&pdev->dev, "Target does not use pinctrl\n");
		_udc_ctxt.ci13xxx_pinctrl = NULL;
		}
		if (res) {
		ret = ci13xxx_msm_install_wake_gpio(pdev, res);
		if (ret < 0) {
		@@ -316,7 +438,11 @@ static int ci13xxx_msm_probe(struct platform_device *pdev)
		goto gpio_uninstall;
		}

		setup_timer(&_udc_ctxt.irq_enable_timer, enable_usb_irq_timer_func,
		(unsigned long)NULL);

		pm_runtime_no_callbacks(&pdev->dev);
		pm_runtime_set_active(&pdev->dev);
		pm_runtime_enable(&pdev->dev);

		return 0;
		@@ -341,6 +467,18 @@ int ci13xxx_msm_remove(struct platform_device *pdev)
		return 0;
		}

		void ci13xxx_msm_shutdown(struct platform_device *pdev)
		{
		ci13xxx_pullup(&_udc->gadget, 0);
		}

		void msm_hw_soft_reset(void)
		{
		struct ci13xxx *udc = _udc;

		hw_device_reset(udc);
		}

		void msm_hw_bam_disable(bool bam_disable)
		{
		u32 val;
		@@ -354,12 +492,52 @@ void msm_hw_bam_disable(bool bam_disable)
		writel_relaxed(val, USB_GENCONFIG);
		}

		void msm_usb_irq_disable(bool disable)
		{
		struct ci13xxx *udc = _udc;
		unsigned long flags;

		spin_lock_irqsave(udc->lock, flags);

		if (_udc_ctxt.irq_disabled == disable) {
		pr_debug("Interrupt state already disable = %d\n", disable);
		if (disable)
		mod_timer(&_udc_ctxt.irq_enable_timer,
		IRQ_ENABLE_DELAY);
		spin_unlock_irqrestore(udc->lock, flags);
		return;
		}

		if (disable) {
		disable_irq_nosync(_udc_ctxt.irq);
		/* start timer here */
		pr_debug("%s: Disabling interrupts\n", __func__);
		mod_timer(&_udc_ctxt.irq_enable_timer, IRQ_ENABLE_DELAY);
		_udc_ctxt.irq_disabled = true;

		} else {
		pr_debug("%s: Enabling interrupts\n", __func__);
		del_timer(&_udc_ctxt.irq_enable_timer);
		enable_irq(_udc_ctxt.irq);
		_udc_ctxt.irq_disabled = false;
		}

		spin_unlock_irqrestore(udc->lock, flags);
		}

		static void enable_usb_irq_timer_func(unsigned long data)
		{
		pr_debug("enabling interrupt from timer\n");
		msm_usb_irq_disable(false);
		}

		static struct platform_driver ci13xxx_msm_driver = {
		.probe = ci13xxx_msm_probe,
		.driver = {
		.name = "msm_hsusb",
		},
		.remove = ci13xxx_msm_remove,
		.shutdown = ci13xxx_msm_shutdown,
		};
		MODULE_ALIAS("platform:msm_hsusb");