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288 lines
6.7 KiB
288 lines
6.7 KiB
/*
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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 "../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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static struct hc_driver __read_mostly ci_ehci_hc_driver;
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static int (*orig_bus_suspend)(struct usb_hcd *hcd);
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struct ehci_ci_priv {
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struct regulator *reg_vbus;
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bool enabled;
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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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struct ci_hdrc *ci = dev_get_drvdata(dev);
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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 && enable != priv->enabled) {
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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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priv->enabled = enable;
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}
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if (enable && (ci->platdata->phy_mode == USBPHY_INTERFACE_MODE_HSIC)) {
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/*
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* Marvell 28nm HSIC PHY requires forcing the port to HS mode.
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* As HSIC is always HS, this should be safe for others.
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*/
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hw_port_test_set(ci, 5);
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hw_port_test_set(ci, 0);
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}
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return 0;
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};
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static int ehci_ci_reset(struct usb_hcd *hcd)
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{
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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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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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int ret;
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ret = ehci_setup(hcd);
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if (ret)
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return ret;
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ehci->need_io_watchdog = 0;
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if (ci->platdata->notify_event) {
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ret = ci->platdata->notify_event(ci,
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CI_HDRC_CONTROLLER_RESET_EVENT);
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if (ret)
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return ret;
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}
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ci_platform_configure(ci);
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return ret;
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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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.reset = ehci_ci_reset,
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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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return usb_hcd_irq(ci->irq, ci->hcd);
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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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if (usb_disabled())
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return -ENODEV;
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hcd = __usb_create_hcd(&ci_ehci_hc_driver, ci->dev->parent,
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ci->dev, dev_name(ci->dev), NULL);
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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_TURN_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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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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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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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_TURN_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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if (ci->platdata->notify_event)
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ci->platdata->notify_event(ci,
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CI_HDRC_CONTROLLER_STOPPED_EVENT);
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usb_remove_hcd(hcd);
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ci->role = CI_ROLE_END;
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synchronize_irq(ci->irq);
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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_TURN_VBUS_EARLY_ON))
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regulator_disable(ci->platdata->reg_vbus);
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}
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ci->hcd = NULL;
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ci->otg.host = NULL;
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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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host_stop(ci);
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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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int ret = orig_bus_suspend(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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if (portsc & PORT_CONNECT) {
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/*
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* For chipidea, the resume signal will be ended
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* automatically, so for remote wakeup case, the
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* usbcmd.rs may not be set before the resume has
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* ended if other resume paths consumes too much
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* time (~24ms), in that case, the SOF will not
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* send out within 3ms after resume ends, then the
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* high speed device will enter full speed mode.
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*/
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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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/*
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* It needs a short delay between set RS bit and PHCD.
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*/
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usleep_range(150, 200);
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break;
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}
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}
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return 0;
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}
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int ci_hdrc_host_init(struct ci_hdrc *ci)
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{
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struct ci_role_driver *rdrv;
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if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC))
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return -ENXIO;
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rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
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if (!rdrv)
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return -ENOMEM;
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rdrv->start = host_start;
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rdrv->stop = host_stop;
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rdrv->irq = host_irq;
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rdrv->name = "host";
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ci->roles[CI_ROLE_HOST] = rdrv;
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return 0;
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}
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void ci_hdrc_host_driver_init(void)
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{
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ehci_init_driver(&ci_ehci_hc_driver, &ehci_ci_overrides);
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orig_bus_suspend = ci_ehci_hc_driver.bus_suspend;
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ci_ehci_hc_driver.bus_suspend = ci_ehci_bus_suspend;
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}
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