Merge "usb: gadget: Add snapshot of ChipIdea controller gadget driver" (ce2a4440) · Commits · e / devices / android_kernel_fairphone_FP3

drivers/usb/gadget/Makefile

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -10,3 +10,5 @@ libcomposite-y := usbstring.o config.o epautoconf.o
	libcomposite-y += composite.o functions.o configfs.o u_f.o		libcomposite-y += composite.o functions.o configfs.o u_f.o

	obj-$(CONFIG_USB_GADGET) += udc/ function/ legacy/		obj-$(CONFIG_USB_GADGET) += udc/ function/ legacy/

			obj-$(CONFIG_USB_CI13XXX_MSM) += ci13xxx_msm.o

drivers/usb/gadget/ci13xxx_msm.c

0 → 100644

+557 −0

Original line number	Original line	Diff line number	Diff line
			/* Copyright (c) 2010-2017, 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
			* only version 2 as published by the Free Software Foundation.
			*/

			#include <linux/module.h>
			#include <linux/platform_device.h>
			#include <linux/pm_runtime.h>
			#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"

			#define MSM_USB_BASE (udc->regs)

			#define CI13XXX_MSM_MAX_LOG2_ITC 7

			struct ci13xxx_udc_context {
			int irq;
			void __iomem *regs;
			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)
			{
			return udc_irq();
			}

			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) {
			enable_irq_wake(_udc_ctxt.wake_irq);
			enable_irq(_udc_ctxt.wake_irq);
			_udc_ctxt.wake_irq_state = true;
			}
			}

			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) {
			disable_irq_wake(_udc_ctxt.wake_irq);
			disable_irq_nosync(_udc_ctxt.wake_irq);
			_udc_ctxt.wake_irq_state = false;
			}
			}

			static void ci13xxx_msm_disconnect(void)
			{
			struct ci13xxx *udc = _udc;
			struct usb_phy *phy = udc->transceiver;

			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
			* short time HW suspend/resume.
			*/
			static void ci13xxx_msm_set_l1(struct ci13xxx *udc)
			{
			int temp;
			struct device *dev = udc->gadget.dev.parent;

			dev_dbg(dev, "Enable link power management\n");

			/* Enable remote wakeup and L1 for IN EPs */
			writel_relaxed(0xffff0000, USB_L1_EP_CTRL);

			temp = readl_relaxed(USB_L1_CONFIG);
			temp \|= L1_CONFIG_LPM_EN \| L1_CONFIG_REMOTE_WAKEUP \|
			L1_CONFIG_GATE_SYS_CLK \| L1_CONFIG_PHY_LPM \|
			L1_CONFIG_PLL;
			writel_relaxed(temp, USB_L1_CONFIG);
			}

			static void ci13xxx_msm_connect(void)
			{
			struct ci13xxx *udc = _udc;
			struct usb_phy *phy = udc->transceiver;

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

			usb_phy_io_write(phy,
			ULPI_MISC_A_VBUSVLDEXT \|
			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_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();
			}
			}

			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);

			if (phy && (phy->flags & ENABLE_SECONDARY_PHY)) {
			int temp;

			dev_dbg(dev, "using secondary hsphy\n");
			temp = readl_relaxed(USB_PHY_CTRL2);
			temp \|= (1<<16);
			writel_relaxed(temp, USB_PHY_CTRL2);

			/*
			* Add memory barrier to make sure above LINK writes are
			* complete before moving ahead with USB peripheral mode
			* enumeration.
			*/
			mb();
			}
			}

			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;

			switch (event) {
			case CI13XXX_CONTROLLER_RESET_EVENT:
			dev_info(dev, "CI13XXX_CONTROLLER_RESET_EVENT received\n");
			ci13xxx_msm_reset();
			break;
			case CI13XXX_CONTROLLER_DISCONNECT_EVENT:
			dev_info(dev, "CI13XXX_CONTROLLER_DISCONNECT_EVENT received\n");
			ci13xxx_msm_disconnect();
			ci13xxx_msm_resume();
			break;
			case CI13XXX_CONTROLLER_CONNECT_EVENT:
			dev_info(dev, "CI13XXX_CONTROLLER_CONNECT_EVENT received\n");
			ci13xxx_msm_connect();
			break;
			case CI13XXX_CONTROLLER_SUSPEND_EVENT:
			dev_info(dev, "CI13XXX_CONTROLLER_SUSPEND_EVENT received\n");
			ci13xxx_msm_suspend();
			break;
			case CI13XXX_CONTROLLER_RESUME_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");
			udc->gadget.interrupt_num = _udc_ctxt.irq;
			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;

			if (udc->transceiver && udc->vbus_active && udc->suspended)
			usb_phy_set_suspend(udc->transceiver, 0);
			else if (!udc->suspended)
			ci13xxx_msm_resume();

			return IRQ_HANDLED;
			}

			static struct ci13xxx_udc_driver ci13xxx_msm_udc_driver = {
			.name = "ci13xxx_msm",
			.flags = CI13XXX_REGS_SHARED \|
			CI13XXX_REQUIRE_TRANSCEIVER \|
			CI13XXX_PULLUP_ON_VBUS \|
			CI13XXX_ZERO_ITC \|
			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,
			struct resource *res)
			{
			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);
			if (wake_irq < 0) {
			dev_err(&pdev->dev, "could not register USB_RESUME GPIO.\n");
			return -ENXIO;
			}

			dev_dbg(&pdev->dev, "_udc_ctxt.gpio_irq = %d and irq = %d\n",
			_udc_ctxt.wake_gpio, wake_irq);
			ret = request_irq(wake_irq, ci13xxx_msm_resume_irq,
			IRQF_TRIGGER_RISING \| IRQF_ONESHOT, "usb resume", NULL);
			if (ret < 0) {
			dev_err(&pdev->dev, "could not register USB_RESUME IRQ.\n");
			goto gpio_free;
			}
			disable_irq(wake_irq);
			_udc_ctxt.wake_irq = wake_irq;

			return 0;

			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;
			int ret;
			struct ci13xxx_platform_data *pdata = pdev->dev.platform_data;
			bool is_l1_supported = false;

			dev_dbg(&pdev->dev, "ci13xxx_msm_probe\n");

			if (pdata) {
			/* Acceptable values for nz_itc are: 0,1,2,4,8,16,32,64 */
			if (pdata->log2_itc > CI13XXX_MSM_MAX_LOG2_ITC \|\|
			pdata->log2_itc <= 0)
			ci13xxx_msm_udc_driver.nz_itc = 0;
			else
			ci13xxx_msm_udc_driver.nz_itc =
			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);
			if (!res) {
			dev_err(&pdev->dev, "failed to get platform resource mem\n");
			return -ENXIO;
			}

			_udc_ctxt.regs = ioremap(res->start, resource_size(res));
			if (!_udc_ctxt.regs) {
			dev_err(&pdev->dev, "ioremap failed\n");
			return -ENOMEM;
			}

			ret = udc_probe(&ci13xxx_msm_udc_driver, &pdev->dev, _udc_ctxt.regs);
			if (ret < 0) {
			dev_err(&pdev->dev, "udc_probe failed\n");
			goto iounmap;
			}

			_udc->gadget.l1_supported = is_l1_supported;

			_udc_ctxt.irq = platform_get_irq(pdev, 0);
			if (_udc_ctxt.irq < 0) {
			dev_err(&pdev->dev, "IRQ not found\n");
			ret = -ENXIO;
			goto udc_remove;
			}

			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) {
			dev_err(&pdev->dev, "gpio irq install failed\n");
			goto udc_remove;
			}
			}

			ret = request_irq(_udc_ctxt.irq, msm_udc_irq, IRQF_SHARED, pdev->name,
			pdev);
			if (ret < 0) {
			dev_err(&pdev->dev, "request_irq failed\n");
			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;

			gpio_uninstall:
			ci13xxx_msm_uninstall_wake_gpio(pdev);
			udc_remove:
			udc_remove();
			iounmap:
			iounmap(_udc_ctxt.regs);

			return ret;
			}

			int ci13xxx_msm_remove(struct platform_device *pdev)
			{
			pm_runtime_disable(&pdev->dev);
			free_irq(_udc_ctxt.irq, pdev);
			ci13xxx_msm_uninstall_wake_gpio(pdev);
			udc_remove();
			iounmap(_udc_ctxt.regs);
			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;
			struct ci13xxx *udc = _udc;

			if (bam_disable)
			val = readl_relaxed(USB_GENCONFIG) \| GENCONFIG_BAM_DISABLE;
			else
			val = readl_relaxed(USB_GENCONFIG) & ~GENCONFIG_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");

			static int __init ci13xxx_msm_init(void)
			{
			return platform_driver_register(&ci13xxx_msm_driver);
			}
			module_init(ci13xxx_msm_init);

			static void __exit ci13xxx_msm_exit(void)
			{
			platform_driver_unregister(&ci13xxx_msm_driver);
			}
			module_exit(ci13xxx_msm_exit);

			MODULE_LICENSE("GPL v2");

drivers/usb/gadget/ci13xxx_udc.c

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+3997 −0

File added.

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drivers/usb/gadget/ci13xxx_udc.h

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Original line number	Original line	Diff line number	Diff line
			/*
			* ci13xxx_udc.h - structures, registers, and macros MIPS USB IP core
			*
			* Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
			*
			* Author: David Lopo
			*
			* This program is free software; you can redistribute it and/or modify
			* it under the terms of the GNU General Public License version 2 as
			* published by the Free Software Foundation.
			*
			* Description: MIPS USB IP core family device controller
			* Structures, registers and logging macros
			*/

			#ifndef _CI13XXX_h_
			#define _CI13XXX_h_

			/******************************************************************************
			* DEFINE
			*****************************************************************************/
			#define CI13XXX_PAGE_SIZE 4096ul /* page size for TD's */
			#define ENDPT_MAX (32)
			#define CTRL_PAYLOAD_MAX (64)
			#define RX (0) /* similar to USB_DIR_OUT but can be used as an index */
			#define TX (1) /* similar to USB_DIR_IN but can be used as an index */

			/* UDC private data:
			* 16MSb - Vendor ID \| 16 LSb Vendor private data
			*/
			#define CI13XX_REQ_VENDOR_ID(id) (id & 0xFFFF0000UL)

			#define MSM_ETD_TYPE BIT(1)
			#define MSM_EP_PIPE_ID_RESET_VAL 0x1F001F

			/******************************************************************************
			* STRUCTURES
			*****************************************************************************/
			/* DMA layout of transfer descriptors */
			struct ci13xxx_td {
			/* 0 */
			u32 next;
			#define TD_TERMINATE BIT(0)
			#define TD_ADDR_MASK (0xFFFFFFEUL << 5)
			/* 1 */
			u32 token;
			#define TD_STATUS (0x00FFUL << 0)
			#define TD_STATUS_TR_ERR BIT(3)
			#define TD_STATUS_DT_ERR BIT(5)
			#define TD_STATUS_HALTED BIT(6)
			#define TD_STATUS_ACTIVE BIT(7)
			#define TD_MULTO (0x0003UL << 10)
			#define TD_IOC BIT(15)
			#define TD_TOTAL_BYTES (0x7FFFUL << 16)
			/* 2 */
			u32 page[5];
			#define TD_CURR_OFFSET (0x0FFFUL << 0)
			#define TD_FRAME_NUM (0x07FFUL << 0)
			#define TD_RESERVED_MASK (0x0FFFUL << 0)
			} __packed __aligned(4);

			/* DMA layout of queue heads */
			struct ci13xxx_qh {
			/* 0 */
			u32 cap;
			#define QH_IOS BIT(15)
			#define QH_MAX_PKT (0x07FFUL << 16)
			#define QH_ZLT BIT(29)
			#define QH_MULT (0x0003UL << 30)
			#define QH_MULT_SHIFT 11
			/* 1 */
			u32 curr;
			/* 2 - 8 */
			struct ci13xxx_td td;
			/* 9 */
			u32 RESERVED;
			struct usb_ctrlrequest setup;
			} __packed __aligned(4);

			/* cache of larger request's original attributes */
			struct ci13xxx_multi_req {
			unsigned int len;
			unsigned int actual;
			void *buf;
			};

			/* Extension of usb_request */
			struct ci13xxx_req {
			struct usb_request req;
			unsigned int map;
			struct list_head queue;
			struct ci13xxx_td *ptr;
			dma_addr_t dma;
			struct ci13xxx_td *zptr;
			dma_addr_t zdma;
			struct ci13xxx_multi_req multi;
			};

			/* Extension of usb_ep */
			struct ci13xxx_ep {
			struct usb_ep ep;
			const struct usb_endpoint_descriptor *desc;
			u8 dir;
			u8 num;
			u8 type;
			char name[16];
			struct {
			struct list_head queue;
			struct ci13xxx_qh *ptr;
			dma_addr_t dma;
			} qh;
			struct list_head rw_queue;
			int wedge;

			/* global resources */
			spinlock_t *lock;
			struct device *device;
			struct dma_pool *td_pool;
			struct ci13xxx_td *last_zptr;
			dma_addr_t last_zdma;
			unsigned long dTD_update_fail_count;
			unsigned long dTD_active_re_q_count;
			unsigned long prime_fail_count;
			int prime_timer_count;
			struct timer_list prime_timer;

			bool multi_req;
			};

			struct ci13xxx;
			struct ci13xxx_udc_driver {
			const char *name;
			unsigned long flags;
			unsigned int nz_itc;
			#define CI13XXX_REGS_SHARED BIT(0)
			#define CI13XXX_REQUIRE_TRANSCEIVER BIT(1)
			#define CI13XXX_PULLUP_ON_VBUS BIT(2)
			#define CI13XXX_DISABLE_STREAMING BIT(3)
			#define CI13XXX_ZERO_ITC BIT(4)
			#define CI13XXX_ENABLE_AHB2AHB_BYPASS BIT(6)

			#define CI13XXX_CONTROLLER_RESET_EVENT 0
			#define CI13XXX_CONTROLLER_CONNECT_EVENT 1
			#define CI13XXX_CONTROLLER_SUSPEND_EVENT 2
			#define CI13XXX_CONTROLLER_REMOTE_WAKEUP_EVENT 3
			#define CI13XXX_CONTROLLER_RESUME_EVENT 4
			#define CI13XXX_CONTROLLER_DISCONNECT_EVENT 5
			#define CI13XXX_CONTROLLER_UDC_STARTED_EVENT 6
			#define CI13XXX_CONTROLLER_ERROR_EVENT 7

			void (notify_event)(struct ci13xxx udc, unsigned int event);
			bool (in_lpm)(struct ci13xxx udc);
			};

			/* CI13XXX UDC descriptor & global resources */
			struct ci13xxx {
			spinlock_t lock; / ctrl register bank access */
			void __iomem regs; / registers address space */

			struct dma_pool qh_pool; / DMA pool for queue heads */
			struct dma_pool td_pool; / DMA pool for transfer descs */
			struct usb_request status; / ep0 status request */
			void status_buf;/ GET_STATUS buffer */

			struct usb_gadget gadget; /* USB slave device */
			struct ci13xxx_ep ci13xxx_ep[ENDPT_MAX]; /* extended endpts */
			u32 ep0_dir; /* ep0 direction */
			#define ep0out ci13xxx_ep[0]
			#define ep0in ci13xxx_ep[hw_ep_max / 2]
			u8 suspended; /* suspended by the host */
			u8 configured; /* is device configured */
			u8 test_mode; /* the selected test mode */
			bool rw_pending; /* Remote wakeup pending flag */
			struct delayed_work rw_work; /* remote wakeup delayed work */
			struct usb_gadget_driver driver; / 3rd party gadget driver */
			struct ci13xxx_udc_driver udc_driver; / device controller driver */
			int vbus_active; /* is VBUS active */
			int softconnect; /* is pull-up enable allowed */
			unsigned long dTD_update_fail_count;
			struct usb_phy transceiver; / Transceiver struct */
			bool skip_flush; /*
			* skip flushing remaining EP
			* upon flush timeout for the
			* first EP.
			*/
			};

			/******************************************************************************
			* REGISTERS
			*****************************************************************************/
			/* register size */
			#define REG_BITS (32)

			/* HCCPARAMS */
			#define HCCPARAMS_LEN BIT(17)

			/* DCCPARAMS */
			#define DCCPARAMS_DEN (0x1F << 0)
			#define DCCPARAMS_DC BIT(7)

			/* TESTMODE */
			#define TESTMODE_FORCE BIT(0)

			/* AHB_MODE */
			#define AHB2AHB_BYPASS BIT(31)

			/* USBCMD */
			#define USBCMD_RS BIT(0)
			#define USBCMD_RST BIT(1)
			#define USBCMD_SUTW BIT(13)
			#define USBCMD_ATDTW BIT(14)

			/* USBSTS & USBINTR */
			#define USBi_UI BIT(0)
			#define USBi_UEI BIT(1)
			#define USBi_PCI BIT(2)
			#define USBi_URI BIT(6)
			#define USBi_SLI BIT(8)

			/* DEVICEADDR */
			#define DEVICEADDR_USBADRA BIT(24)
			#define DEVICEADDR_USBADR (0x7FUL << 25)

			/* PORTSC */
			#define PORTSC_FPR BIT(6)
			#define PORTSC_SUSP BIT(7)
			#define PORTSC_PR BIT(8)
			#define PORTSC_HSP BIT(9)
			#define PORTSC_PTC (0x0FUL << 16)

			/* DEVLC */
			#define DEVLC_PSPD (0x03UL << 25)
			#define DEVLC_PSPD_HS (0x02UL << 25)

			/* USBMODE */
			#define USBMODE_CM (0x03UL << 0)
			#define USBMODE_CM_IDLE (0x00UL << 0)
			#define USBMODE_CM_DEVICE (0x02UL << 0)
			#define USBMODE_CM_HOST (0x03UL << 0)
			#define USBMODE_SLOM BIT(3)
			#define USBMODE_SDIS BIT(4)
			#define USBCMD_ITC(n) (n << 16) /* n = 0, 1, 2, 4, 8, 16, 32, 64 */
			#define USBCMD_ITC_MASK (0xFF << 16)

			/* ENDPTCTRL */
			#define ENDPTCTRL_RXS BIT(0)
			#define ENDPTCTRL_RXT (0x03UL << 2)
			#define ENDPTCTRL_RXR BIT(6) /* reserved for port 0 */
			#define ENDPTCTRL_RXE BIT(7)
			#define ENDPTCTRL_TXS BIT(16)
			#define ENDPTCTRL_TXT (0x03UL << 18)
			#define ENDPTCTRL_TXR BIT(22) /* reserved for port 0 */
			#define ENDPTCTRL_TXE BIT(23)

			/******************************************************************************
			* LOGGING
			*****************************************************************************/
			#define ci13xxx_printk(level, format, args...) \
			do { \
			if (_udc == NULL) \
			printk(level "[%s] " format "\n", __func__, ## args); \
			else \
			dev_printk(level, _udc->gadget.dev.parent, \
			"[%s] " format "\n", __func__, ## args); \
			} while (0)

			#ifndef err
			#define err(format, args...) ci13xxx_printk(KERN_ERR, format, ## args)
			#endif

			#define warn(format, args...) ci13xxx_printk(KERN_WARNING, format, ## args)
			#define info(format, args...) ci13xxx_printk(KERN_INFO, format, ## args)

			#ifdef TRACE
			#define trace(format, args...) ci13xxx_printk(KERN_DEBUG, format, ## args)
			#define dbg_trace(format, args...) dev_dbg(dev, format, ##args)
			#else
			#define trace(format, args...) do {} while (0)
			#define dbg_trace(format, args...) do {} while (0)
			#endif

			#endif /* _CI13XXX_h_ */

drivers/usb/gadget/udc/Kconfig

+14 −0

Original line number	Original line	Diff line number	Diff line
	@@ -389,6 +389,20 @@ config USB_GADGET_XILINX
	dynamically linked module called "udc-xilinx" and force all		dynamically linked module called "udc-xilinx" and force all
	gadget drivers to also be dynamically linked.		gadget drivers to also be dynamically linked.

			config USB_CI13XXX_MSM
			tristate "MIPS USB CI13xxx for MSM"
			select USB_MSM_OTG
			help
			MSM SoC has chipidea USB controller. This driver uses
			ci13xxx_udc core.
			This driver depends on OTG driver for PHY initialization,
			clock management, powering up VBUS, and power management.
			This driver is not supported on boards like trout which
			has an external PHY.

			Say "y" to link the driver statically, or "m" to build a
			dynamically linked module called "ci13xxx_msm" and force all
			gadget drivers to also be dynamically linked.
	#		#
	# LAST -- dummy/emulated controller		# LAST -- dummy/emulated controller
	#		#