alistair23-linux/drivers/usb/chipidea/host.c
Greg Kroah-Hartman 51b751f112 USB: chipidea: Remove redundant license text
Now that the SPDX tag is in all USB files, that identifies the license
in a specific and legally-defined manner.  So the extra GPL text wording
can be removed as it is no longer needed at all.

This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text.  And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.

No copyright headers or other non-license-description text was removed.

Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Acked-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-07 15:45:01 +01:00

275 lines
6 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* host.c - ChipIdea USB host controller driver
*
* Copyright (c) 2012 Intel Corporation
*
* Author: Alexander Shishkin
*/
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/usb/chipidea.h>
#include <linux/regulator/consumer.h>
#include "../host/ehci.h"
#include "ci.h"
#include "bits.h"
#include "host.h"
static struct hc_driver __read_mostly ci_ehci_hc_driver;
static int (*orig_bus_suspend)(struct usb_hcd *hcd);
struct ehci_ci_priv {
struct regulator *reg_vbus;
};
static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
struct ehci_ci_priv *priv = (struct ehci_ci_priv *)ehci->priv;
struct device *dev = hcd->self.controller;
struct ci_hdrc *ci = dev_get_drvdata(dev);
int ret = 0;
int port = HCS_N_PORTS(ehci->hcs_params);
if (priv->reg_vbus) {
if (port > 1) {
dev_warn(dev,
"Not support multi-port regulator control\n");
return 0;
}
if (enable)
ret = regulator_enable(priv->reg_vbus);
else
ret = regulator_disable(priv->reg_vbus);
if (ret) {
dev_err(dev,
"Failed to %s vbus regulator, ret=%d\n",
enable ? "enable" : "disable", ret);
return ret;
}
}
if (enable && (ci->platdata->phy_mode == USBPHY_INTERFACE_MODE_HSIC)) {
/*
* Marvell 28nm HSIC PHY requires forcing the port to HS mode.
* As HSIC is always HS, this should be safe for others.
*/
hw_port_test_set(ci, 5);
hw_port_test_set(ci, 0);
}
return 0;
};
static int ehci_ci_reset(struct usb_hcd *hcd)
{
struct device *dev = hcd->self.controller;
struct ci_hdrc *ci = dev_get_drvdata(dev);
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
int ret;
ret = ehci_setup(hcd);
if (ret)
return ret;
ehci->need_io_watchdog = 0;
if (ci->platdata->notify_event) {
ret = ci->platdata->notify_event(ci,
CI_HDRC_CONTROLLER_RESET_EVENT);
if (ret)
return ret;
}
ci_platform_configure(ci);
return ret;
}
static const struct ehci_driver_overrides ehci_ci_overrides = {
.extra_priv_size = sizeof(struct ehci_ci_priv),
.port_power = ehci_ci_portpower,
.reset = ehci_ci_reset,
};
static irqreturn_t host_irq(struct ci_hdrc *ci)
{
return usb_hcd_irq(ci->irq, ci->hcd);
}
static int host_start(struct ci_hdrc *ci)
{
struct usb_hcd *hcd;
struct ehci_hcd *ehci;
struct ehci_ci_priv *priv;
int ret;
if (usb_disabled())
return -ENODEV;
hcd = __usb_create_hcd(&ci_ehci_hc_driver, ci->dev->parent,
ci->dev, dev_name(ci->dev), NULL);
if (!hcd)
return -ENOMEM;
dev_set_drvdata(ci->dev, ci);
hcd->rsrc_start = ci->hw_bank.phys;
hcd->rsrc_len = ci->hw_bank.size;
hcd->regs = ci->hw_bank.abs;
hcd->has_tt = 1;
hcd->power_budget = ci->platdata->power_budget;
hcd->tpl_support = ci->platdata->tpl_support;
if (ci->phy)
hcd->phy = ci->phy;
else
hcd->usb_phy = ci->usb_phy;
ehci = hcd_to_ehci(hcd);
ehci->caps = ci->hw_bank.cap;
ehci->has_hostpc = ci->hw_bank.lpm;
ehci->has_tdi_phy_lpm = ci->hw_bank.lpm;
ehci->imx28_write_fix = ci->imx28_write_fix;
priv = (struct ehci_ci_priv *)ehci->priv;
priv->reg_vbus = NULL;
if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) {
if (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON) {
ret = regulator_enable(ci->platdata->reg_vbus);
if (ret) {
dev_err(ci->dev,
"Failed to enable vbus regulator, ret=%d\n",
ret);
goto put_hcd;
}
} else {
priv->reg_vbus = ci->platdata->reg_vbus;
}
}
ret = usb_add_hcd(hcd, 0, 0);
if (ret) {
goto disable_reg;
} else {
struct usb_otg *otg = &ci->otg;
ci->hcd = hcd;
if (ci_otg_is_fsm_mode(ci)) {
otg->host = &hcd->self;
hcd->self.otg_port = 1;
}
}
return ret;
disable_reg:
if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
(ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
regulator_disable(ci->platdata->reg_vbus);
put_hcd:
usb_put_hcd(hcd);
return ret;
}
static void host_stop(struct ci_hdrc *ci)
{
struct usb_hcd *hcd = ci->hcd;
if (hcd) {
if (ci->platdata->notify_event)
ci->platdata->notify_event(ci,
CI_HDRC_CONTROLLER_STOPPED_EVENT);
usb_remove_hcd(hcd);
ci->role = CI_ROLE_END;
synchronize_irq(ci->irq);
usb_put_hcd(hcd);
if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
(ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
regulator_disable(ci->platdata->reg_vbus);
}
ci->hcd = NULL;
ci->otg.host = NULL;
}
void ci_hdrc_host_destroy(struct ci_hdrc *ci)
{
if (ci->role == CI_ROLE_HOST && ci->hcd)
host_stop(ci);
}
static int ci_ehci_bus_suspend(struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
int port;
u32 tmp;
int ret = orig_bus_suspend(hcd);
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);
break;
}
}
return 0;
}
int ci_hdrc_host_init(struct ci_hdrc *ci)
{
struct ci_role_driver *rdrv;
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->name = "host";
ci->roles[CI_ROLE_HOST] = rdrv;
return 0;
}
void ci_hdrc_host_driver_init(void)
{
ehci_init_driver(&ci_ehci_hc_driver, &ehci_ci_overrides);
orig_bus_suspend = ci_ehci_hc_driver.bus_suspend;
ci_ehci_hc_driver.bus_suspend = ci_ehci_bus_suspend;
}