571 lines
15 KiB
C
571 lines
15 KiB
C
/*
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* host.c - ChipIdea USB host controller driver
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*
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* Copyright (c) 2012 Intel Corporation
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*
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* Author: Alexander Shishkin
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/kernel.h>
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#include <linux/io.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include <linux/usb/chipidea.h>
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#include <linux/regulator/consumer.h>
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#include <linux/imx_gpc.h>
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#include <linux/platform_device.h>
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#include "../host/ehci.h"
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#include "ci.h"
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#include "bits.h"
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#include "host.h"
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#define MAX_CI_NUM 8
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static struct hc_driver __read_mostly ci_ehci_hc_driver[MAX_CI_NUM];
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static int (*orig_bus_suspend)(struct usb_hcd *hcd);
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static int (*orig_bus_resume)(struct usb_hcd *hcd);
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static int (*orig_hub_control)(struct usb_hcd *hcd,
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u16 typeReq, u16 wValue, u16 wIndex,
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char *buf, u16 wLength);
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struct ehci_ci_priv {
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struct regulator *reg_vbus;
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};
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/* This function is used to override WKCN, WKDN, and WKOC */
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static void ci_ehci_override_wakeup_flag(struct ehci_hcd *ehci,
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u32 __iomem *reg, u32 flags, bool set)
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{
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u32 val = ehci_readl(ehci, reg);
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if (set)
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val |= flags;
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else
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val &= ~flags;
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ehci_writel(ehci, val, reg);
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}
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static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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struct ehci_ci_priv *priv = (struct ehci_ci_priv *)ehci->priv;
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struct device *dev = hcd->self.controller;
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int ret = 0;
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int port = HCS_N_PORTS(ehci->hcs_params);
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if (priv->reg_vbus) {
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if (port > 1) {
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dev_warn(dev,
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"Not support multi-port regulator control\n");
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return 0;
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}
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if (enable)
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ret = regulator_enable(priv->reg_vbus);
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else
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ret = regulator_disable(priv->reg_vbus);
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if (ret) {
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dev_err(dev,
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"Failed to %s vbus regulator, ret=%d\n",
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enable ? "enable" : "disable", ret);
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return ret;
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}
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}
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return 0;
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};
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static const struct ehci_driver_overrides ehci_ci_overrides = {
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.extra_priv_size = sizeof(struct ehci_ci_priv),
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.port_power = ehci_ci_portpower,
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};
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static int ci_imx_ehci_bus_resume(struct usb_hcd *hcd)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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int port;
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int ret = orig_bus_resume(hcd);
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if (ret)
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return ret;
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port = HCS_N_PORTS(ehci->hcs_params);
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while (port--) {
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u32 __iomem *reg = &ehci->regs->port_status[port];
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u32 portsc = ehci_readl(ehci, reg);
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/*
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* Notify PHY after resume signal has finished, it is
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* for global suspend case.
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*/
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if (hcd->usb_phy
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&& test_bit(port, &ehci->bus_suspended)
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&& (portsc & PORT_CONNECT)
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&& (ehci_port_speed(ehci, portsc) ==
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USB_PORT_STAT_HIGH_SPEED))
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/* notify the USB PHY */
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usb_phy_notify_resume(hcd->usb_phy, USB_SPEED_HIGH);
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}
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return 0;
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}
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#ifdef CONFIG_USB_OTG
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static int ci_start_port_reset(struct usb_hcd *hcd, unsigned port)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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u32 __iomem *reg;
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u32 status;
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if (!port)
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return -EINVAL;
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port--;
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/* start port reset before HNP protocol time out */
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reg = &ehci->regs->port_status[port];
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status = ehci_readl(ehci, reg);
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if (!(status & PORT_CONNECT))
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return -ENODEV;
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/* khubd will finish the reset later */
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if (ehci_is_TDI(ehci))
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ehci_writel(ehci, status | (PORT_RESET & ~PORT_RWC_BITS), reg);
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else
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ehci_writel(ehci, status | PORT_RESET, reg);
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return 0;
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}
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#else
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#define ci_start_port_reset NULL
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#endif
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/* The below code is based on tegra ehci driver */
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static int ci_imx_ehci_hub_control(
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struct usb_hcd *hcd,
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u16 typeReq,
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u16 wValue,
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u16 wIndex,
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char *buf,
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u16 wLength
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)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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u32 __iomem *status_reg;
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u32 temp;
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unsigned long flags;
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int retval = 0;
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struct device *dev = hcd->self.controller;
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struct ci_hdrc *ci = dev_get_drvdata(dev);
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status_reg = &ehci->regs->port_status[(wIndex & 0xff) - 1];
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spin_lock_irqsave(&ehci->lock, flags);
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if (typeReq == SetPortFeature && wValue == USB_PORT_FEAT_SUSPEND) {
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temp = ehci_readl(ehci, status_reg);
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if ((temp & PORT_PE) == 0 || (temp & PORT_RESET) != 0) {
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retval = -EPIPE;
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goto done;
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}
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temp &= ~(PORT_RWC_BITS | PORT_WKCONN_E);
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temp |= PORT_WKDISC_E | PORT_WKOC_E;
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ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
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/*
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* If a transaction is in progress, there may be a delay in
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* suspending the port. Poll until the port is suspended.
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*/
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if (ehci_handshake(ehci, status_reg, PORT_SUSPEND,
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PORT_SUSPEND, 5000))
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ehci_err(ehci, "timeout waiting for SUSPEND\n");
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if (ci->platdata->flags & CI_HDRC_IMX_IS_HSIC) {
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if (ci->platdata->notify_event)
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ci->platdata->notify_event
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(ci, CI_HDRC_IMX_HSIC_SUSPEND_EVENT);
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ci_ehci_override_wakeup_flag(ehci, status_reg,
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PORT_WKDISC_E | PORT_WKCONN_E, false);
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}
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spin_unlock_irqrestore(&ehci->lock, flags);
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if (ehci_port_speed(ehci, temp) ==
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USB_PORT_STAT_HIGH_SPEED && hcd->usb_phy) {
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/* notify the USB PHY */
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usb_phy_notify_suspend(hcd->usb_phy, USB_SPEED_HIGH);
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}
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spin_lock_irqsave(&ehci->lock, flags);
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set_bit((wIndex & 0xff) - 1, &ehci->suspended_ports);
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goto done;
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}
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/*
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* After resume has finished, it needs do some post resume
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* operation for some SoCs.
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*/
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else if (typeReq == ClearPortFeature &&
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wValue == USB_PORT_FEAT_C_SUSPEND) {
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/* Make sure the resume has finished, it should be finished */
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if (ehci_handshake(ehci, status_reg, PORT_RESUME, 0, 25000))
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ehci_err(ehci, "timeout waiting for resume\n");
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temp = ehci_readl(ehci, status_reg);
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if (ehci_port_speed(ehci, temp) ==
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USB_PORT_STAT_HIGH_SPEED && hcd->usb_phy) {
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/* notify the USB PHY */
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usb_phy_notify_resume(hcd->usb_phy, USB_SPEED_HIGH);
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}
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}
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spin_unlock_irqrestore(&ehci->lock, flags);
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/* Handle the hub control events here */
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return orig_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
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done:
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spin_unlock_irqrestore(&ehci->lock, flags);
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return retval;
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}
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static irqreturn_t host_irq(struct ci_hdrc *ci)
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{
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if (ci->hcd)
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return usb_hcd_irq(ci->irq, ci->hcd);
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else
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return IRQ_NONE;
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}
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static int host_start(struct ci_hdrc *ci)
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{
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struct usb_hcd *hcd;
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struct ehci_hcd *ehci;
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struct ehci_ci_priv *priv;
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int ret;
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struct platform_device *pdev = to_platform_device(ci->dev);
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if (usb_disabled())
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return -ENODEV;
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hcd = usb_create_hcd(&ci_ehci_hc_driver[pdev->id],
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ci->dev, dev_name(ci->dev));
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if (!hcd)
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return -ENOMEM;
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dev_set_drvdata(ci->dev, ci);
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hcd->rsrc_start = ci->hw_bank.phys;
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hcd->rsrc_len = ci->hw_bank.size;
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hcd->regs = ci->hw_bank.abs;
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hcd->has_tt = 1;
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hcd->power_budget = ci->platdata->power_budget;
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hcd->tpl_support = ci->platdata->tpl_support;
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if (ci->phy)
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hcd->phy = ci->phy;
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else
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hcd->usb_phy = ci->usb_phy;
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ehci = hcd_to_ehci(hcd);
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ehci->caps = ci->hw_bank.cap;
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ehci->has_hostpc = ci->hw_bank.lpm;
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ehci->has_tdi_phy_lpm = ci->hw_bank.lpm;
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ehci->imx28_write_fix = ci->imx28_write_fix;
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priv = (struct ehci_ci_priv *)ehci->priv;
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priv->reg_vbus = NULL;
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if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) {
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if (ci->platdata->flags & CI_HDRC_IMX_VBUS_EARLY_ON) {
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ret = regulator_enable(ci->platdata->reg_vbus);
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if (ret) {
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dev_err(ci->dev,
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"Failed to enable vbus regulator, ret=%d\n",
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ret);
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goto put_hcd;
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}
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} else {
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priv->reg_vbus = ci->platdata->reg_vbus;
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}
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}
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if (ci_otg_is_fsm_mode(ci)) {
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if (ci->fsm.id && ci->fsm.otg->state <= OTG_STATE_B_HOST)
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hcd->self.is_b_host = 1;
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else
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hcd->self.is_b_host = 0;
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}
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ret = usb_add_hcd(hcd, 0, 0);
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if (ret) {
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goto disable_reg;
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} else {
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struct usb_otg *otg = &ci->otg;
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ci->hcd = hcd;
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if (ci_otg_is_fsm_mode(ci)) {
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hcd->self.otg_fsm = &ci->fsm;
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otg->host = &hcd->self;
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hcd->self.otg_port = 1;
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}
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}
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if (ci->platdata->flags & CI_HDRC_DISABLE_STREAMING)
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hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);
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if (ci->platdata->notify_event &&
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(ci->platdata->flags & CI_HDRC_IMX_IS_HSIC))
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ci->platdata->notify_event
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(ci, CI_HDRC_IMX_HSIC_ACTIVE_EVENT);
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if (ci->platdata->flags & CI_HDRC_DISABLE_HOST_STREAMING)
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hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);
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ci_hdrc_ahb_config(ci);
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return ret;
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disable_reg:
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if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
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(ci->platdata->flags & CI_HDRC_IMX_VBUS_EARLY_ON))
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regulator_disable(ci->platdata->reg_vbus);
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put_hcd:
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usb_put_hcd(hcd);
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return ret;
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}
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static void host_stop(struct ci_hdrc *ci)
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{
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struct usb_hcd *hcd = ci->hcd;
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if (hcd) {
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usb_remove_hcd(hcd);
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usb_put_hcd(hcd);
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if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
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(ci->platdata->flags & CI_HDRC_IMX_VBUS_EARLY_ON))
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regulator_disable(ci->platdata->reg_vbus);
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if (hcd->self.is_b_host)
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hcd->self.is_b_host = 0;
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}
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ci->hcd = NULL;
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}
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bool ci_hdrc_host_has_device(struct ci_hdrc *ci)
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{
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struct usb_device *roothub;
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int i;
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if ((ci->role == CI_ROLE_HOST) && ci->hcd) {
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roothub = ci->hcd->self.root_hub;
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for (i = 0; i < roothub->maxchild; ++i) {
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if (usb_hub_find_child(roothub, (i + 1)))
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return true;
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}
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}
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return false;
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}
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static void ci_hdrc_host_save_for_power_lost(struct ci_hdrc *ci)
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{
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struct ehci_hcd *ehci;
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if (!ci->hcd)
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return;
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ehci = hcd_to_ehci(ci->hcd);
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/* save EHCI registers */
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ci->pm_usbmode = ehci_readl(ehci, &ehci->regs->usbmode);
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ci->pm_command = ehci_readl(ehci, &ehci->regs->command);
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ci->pm_command &= ~CMD_RUN;
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ci->pm_status = ehci_readl(ehci, &ehci->regs->status);
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ci->pm_intr_enable = ehci_readl(ehci, &ehci->regs->intr_enable);
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ci->pm_frame_index = ehci_readl(ehci, &ehci->regs->frame_index);
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ci->pm_segment = ehci_readl(ehci, &ehci->regs->segment);
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ci->pm_frame_list = ehci_readl(ehci, &ehci->regs->frame_list);
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ci->pm_async_next = ehci_readl(ehci, &ehci->regs->async_next);
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ci->pm_configured_flag =
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ehci_readl(ehci, &ehci->regs->configured_flag);
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ci->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]);
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}
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static void ci_hdrc_host_restore_from_power_lost(struct ci_hdrc *ci)
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{
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struct ehci_hcd *ehci;
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unsigned long flags;
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u32 tmp;
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if (!ci->hcd)
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return;
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hw_controller_reset(ci);
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ehci = hcd_to_ehci(ci->hcd);
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spin_lock_irqsave(&ehci->lock, flags);
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/* Restore EHCI registers */
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ehci_writel(ehci, ci->pm_usbmode, &ehci->regs->usbmode);
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ehci_writel(ehci, ci->pm_portsc, &ehci->regs->port_status[0]);
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ehci_writel(ehci, ci->pm_command, &ehci->regs->command);
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ehci_writel(ehci, ci->pm_intr_enable, &ehci->regs->intr_enable);
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ehci_writel(ehci, ci->pm_frame_index, &ehci->regs->frame_index);
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ehci_writel(ehci, ci->pm_segment, &ehci->regs->segment);
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ehci_writel(ehci, ci->pm_frame_list, &ehci->regs->frame_list);
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ehci_writel(ehci, ci->pm_async_next, &ehci->regs->async_next);
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ehci_writel(ehci, ci->pm_configured_flag,
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&ehci->regs->configured_flag);
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/* Restore the PHY's connect notifier setting */
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if (ci->pm_portsc & PORTSC_HSP)
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usb_phy_notify_connect(ci->usb_phy, USB_SPEED_HIGH);
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ci_hdrc_ahb_config(ci);
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tmp = ehci_readl(ehci, &ehci->regs->command);
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tmp |= CMD_RUN;
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ehci_writel(ehci, tmp, &ehci->regs->command);
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spin_unlock_irqrestore(&ehci->lock, flags);
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}
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static void ci_hdrc_host_suspend(struct ci_hdrc *ci)
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{
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if (ci_hdrc_host_has_device(ci))
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imx_gpc_mf_request_on(ci->irq, 1);
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ci_hdrc_host_save_for_power_lost(ci);
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}
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static void ci_hdrc_host_resume(struct ci_hdrc *ci, bool power_lost)
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{
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imx_gpc_mf_request_on(ci->irq, 0);
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if (power_lost)
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ci_hdrc_host_restore_from_power_lost(ci);
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}
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void ci_hdrc_host_destroy(struct ci_hdrc *ci)
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{
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if (ci->role == CI_ROLE_HOST && ci->hcd) {
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disable_irq_nosync(ci->irq);
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host_stop(ci);
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enable_irq(ci->irq);
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}
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}
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static int ci_ehci_bus_suspend(struct usb_hcd *hcd)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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int port;
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u32 tmp;
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struct device *dev = hcd->self.controller;
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struct ci_hdrc *ci = dev_get_drvdata(dev);
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int ret = orig_bus_suspend(hcd);
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if (ret)
|
|
return ret;
|
|
|
|
port = HCS_N_PORTS(ehci->hcs_params);
|
|
while (port--) {
|
|
u32 __iomem *reg = &ehci->regs->port_status[port];
|
|
u32 portsc = ehci_readl(ehci, reg);
|
|
|
|
if (portsc & PORT_CONNECT) {
|
|
/*
|
|
* For chipidea, the resume signal will be ended
|
|
* automatically, so for remote wakeup case, the
|
|
* usbcmd.rs may not be set before the resume has
|
|
* ended if other resume paths consumes too much
|
|
* time (~24ms), in that case, the SOF will not
|
|
* send out within 3ms after resume ends, then the
|
|
* high speed device will enter full speed mode.
|
|
*/
|
|
|
|
tmp = ehci_readl(ehci, &ehci->regs->command);
|
|
tmp |= CMD_RUN;
|
|
ehci_writel(ehci, tmp, &ehci->regs->command);
|
|
/*
|
|
* It needs a short delay between set RS bit and PHCD.
|
|
*/
|
|
usleep_range(150, 200);
|
|
|
|
/*
|
|
* If a transaction is in progress, there may be a delay in
|
|
* suspending the port. Poll until the port is suspended.
|
|
*/
|
|
if (test_bit(port, &ehci->bus_suspended) &&
|
|
ehci_handshake(ehci, reg, PORT_SUSPEND,
|
|
PORT_SUSPEND, 5000))
|
|
ehci_err(ehci, "timeout waiting for SUSPEND\n");
|
|
|
|
if (ci->platdata->flags & CI_HDRC_IMX_IS_HSIC)
|
|
ci_ehci_override_wakeup_flag(ehci, reg,
|
|
PORT_WKDISC_E | PORT_WKCONN_E, false);
|
|
|
|
if (hcd->usb_phy && test_bit(port, &ehci->bus_suspended)
|
|
&& (ehci_port_speed(ehci, portsc) ==
|
|
USB_PORT_STAT_HIGH_SPEED))
|
|
/*
|
|
* notify the USB PHY, it is for global
|
|
* suspend case.
|
|
*/
|
|
usb_phy_notify_suspend(hcd->usb_phy,
|
|
USB_SPEED_HIGH);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ci_hdrc_host_init(struct ci_hdrc *ci)
|
|
{
|
|
struct ci_role_driver *rdrv;
|
|
struct platform_device *pdev = to_platform_device(ci->dev);
|
|
struct hc_driver *ci_ehci_driver = &ci_ehci_hc_driver[pdev->id];
|
|
|
|
if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC))
|
|
return -ENXIO;
|
|
|
|
rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
|
|
if (!rdrv)
|
|
return -ENOMEM;
|
|
|
|
rdrv->start = host_start;
|
|
rdrv->stop = host_stop;
|
|
rdrv->irq = host_irq;
|
|
rdrv->suspend = ci_hdrc_host_suspend;
|
|
rdrv->resume = ci_hdrc_host_resume;
|
|
rdrv->name = "host";
|
|
ci->roles[CI_ROLE_HOST] = rdrv;
|
|
|
|
ehci_init_driver(ci_ehci_driver, &ehci_ci_overrides);
|
|
orig_bus_suspend = ci_ehci_driver->bus_suspend;
|
|
orig_bus_resume = ci_ehci_driver->bus_resume;
|
|
orig_hub_control = ci_ehci_driver->hub_control;
|
|
|
|
ci_ehci_driver->bus_suspend = ci_ehci_bus_suspend;
|
|
if (ci->platdata->flags & CI_HDRC_IMX_EHCI_QUIRK) {
|
|
ci_ehci_driver->bus_resume = ci_imx_ehci_bus_resume;
|
|
ci_ehci_driver->hub_control = ci_imx_ehci_hub_control;
|
|
}
|
|
ci_ehci_driver->start_port_reset = ci_start_port_reset;
|
|
|
|
return 0;
|
|
}
|