linux-stable/drivers/usb/host/ohci-platform.c
Martin Blumenstingl 1255dfd187 usb: host: ohci-platform: remove custom USB PHY handling
The new PHY wrapper is now wired up in the core HCD code. This means
that PHYs are now controlled (initialized, enabled, disabled, exited)
without requiring any host-driver specific code.
Remove the custom USB PHY handling from the ohci-platform driver as the
core HCD code now handles this.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Neil Armstrong <narmstrong@baylibre.con>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-03-09 09:43:53 -08:00

358 lines
8.6 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Generic platform ohci driver
*
* Copyright 2007 Michael Buesch <m@bues.ch>
* Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
* Copyright 2014 Hans de Goede <hdegoede@redhat.com>
*
* Derived from the OCHI-SSB driver
* Derived from the OHCI-PCI driver
* Copyright 1999 Roman Weissgaerber
* Copyright 2000-2002 David Brownell
* Copyright 1999 Linus Torvalds
* Copyright 1999 Gregory P. Smith
*/
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/hrtimer.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include <linux/usb/ohci_pdriver.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include "ohci.h"
#define DRIVER_DESC "OHCI generic platform driver"
#define OHCI_MAX_CLKS 3
#define hcd_to_ohci_priv(h) ((struct ohci_platform_priv *)hcd_to_ohci(h)->priv)
struct ohci_platform_priv {
struct clk *clks[OHCI_MAX_CLKS];
struct reset_control *resets;
};
static const char hcd_name[] = "ohci-platform";
static int ohci_platform_power_on(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
int clk, ret;
for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++) {
ret = clk_prepare_enable(priv->clks[clk]);
if (ret)
goto err_disable_clks;
}
return 0;
err_disable_clks:
while (--clk >= 0)
clk_disable_unprepare(priv->clks[clk]);
return ret;
}
static void ohci_platform_power_off(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
int clk;
for (clk = OHCI_MAX_CLKS - 1; clk >= 0; clk--)
if (priv->clks[clk])
clk_disable_unprepare(priv->clks[clk]);
}
static struct hc_driver __read_mostly ohci_platform_hc_driver;
static const struct ohci_driver_overrides platform_overrides __initconst = {
.product_desc = "Generic Platform OHCI controller",
.extra_priv_size = sizeof(struct ohci_platform_priv),
};
static struct usb_ohci_pdata ohci_platform_defaults = {
.power_on = ohci_platform_power_on,
.power_suspend = ohci_platform_power_off,
.power_off = ohci_platform_power_off,
};
static int ohci_platform_probe(struct platform_device *dev)
{
struct usb_hcd *hcd;
struct resource *res_mem;
struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
struct ohci_platform_priv *priv;
struct ohci_hcd *ohci;
int err, irq, clk = 0;
if (usb_disabled())
return -ENODEV;
/*
* Use reasonable defaults so platforms don't have to provide these
* with DT probing on ARM.
*/
if (!pdata)
pdata = &ohci_platform_defaults;
err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
if (err)
return err;
irq = platform_get_irq(dev, 0);
if (irq < 0) {
dev_err(&dev->dev, "no irq provided");
return irq;
}
hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
dev_name(&dev->dev));
if (!hcd)
return -ENOMEM;
platform_set_drvdata(dev, hcd);
dev->dev.platform_data = pdata;
priv = hcd_to_ohci_priv(hcd);
ohci = hcd_to_ohci(hcd);
if (pdata == &ohci_platform_defaults && dev->dev.of_node) {
if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
ohci->flags |= OHCI_QUIRK_BE_MMIO;
if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
ohci->flags |= OHCI_QUIRK_BE_DESC;
if (of_property_read_bool(dev->dev.of_node, "big-endian"))
ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
if (of_property_read_bool(dev->dev.of_node, "no-big-frame-no"))
ohci->flags |= OHCI_QUIRK_FRAME_NO;
if (of_property_read_bool(dev->dev.of_node,
"remote-wakeup-connected"))
ohci->hc_control = OHCI_CTRL_RWC;
of_property_read_u32(dev->dev.of_node, "num-ports",
&ohci->num_ports);
for (clk = 0; clk < OHCI_MAX_CLKS; clk++) {
priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
if (IS_ERR(priv->clks[clk])) {
err = PTR_ERR(priv->clks[clk]);
if (err == -EPROBE_DEFER)
goto err_put_clks;
priv->clks[clk] = NULL;
break;
}
}
priv->resets = devm_reset_control_array_get_optional_shared(
&dev->dev);
if (IS_ERR(priv->resets)) {
err = PTR_ERR(priv->resets);
goto err_put_clks;
}
err = reset_control_deassert(priv->resets);
if (err)
goto err_put_clks;
}
if (pdata->big_endian_desc)
ohci->flags |= OHCI_QUIRK_BE_DESC;
if (pdata->big_endian_mmio)
ohci->flags |= OHCI_QUIRK_BE_MMIO;
if (pdata->no_big_frame_no)
ohci->flags |= OHCI_QUIRK_FRAME_NO;
if (pdata->num_ports)
ohci->num_ports = pdata->num_ports;
#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
if (ohci->flags & OHCI_QUIRK_BE_MMIO) {
dev_err(&dev->dev,
"Error: CONFIG_USB_OHCI_BIG_ENDIAN_MMIO not set\n");
err = -EINVAL;
goto err_reset;
}
#endif
#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_DESC
if (ohci->flags & OHCI_QUIRK_BE_DESC) {
dev_err(&dev->dev,
"Error: CONFIG_USB_OHCI_BIG_ENDIAN_DESC not set\n");
err = -EINVAL;
goto err_reset;
}
#endif
pm_runtime_set_active(&dev->dev);
pm_runtime_enable(&dev->dev);
if (pdata->power_on) {
err = pdata->power_on(dev);
if (err < 0)
goto err_reset;
}
res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
if (IS_ERR(hcd->regs)) {
err = PTR_ERR(hcd->regs);
goto err_power;
}
hcd->rsrc_start = res_mem->start;
hcd->rsrc_len = resource_size(res_mem);
err = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (err)
goto err_power;
device_wakeup_enable(hcd->self.controller);
platform_set_drvdata(dev, hcd);
return err;
err_power:
if (pdata->power_off)
pdata->power_off(dev);
err_reset:
pm_runtime_disable(&dev->dev);
reset_control_assert(priv->resets);
err_put_clks:
while (--clk >= 0)
clk_put(priv->clks[clk]);
if (pdata == &ohci_platform_defaults)
dev->dev.platform_data = NULL;
usb_put_hcd(hcd);
return err;
}
static int ohci_platform_remove(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
int clk;
pm_runtime_get_sync(&dev->dev);
usb_remove_hcd(hcd);
if (pdata->power_off)
pdata->power_off(dev);
reset_control_assert(priv->resets);
for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++)
clk_put(priv->clks[clk]);
usb_put_hcd(hcd);
pm_runtime_put_sync(&dev->dev);
pm_runtime_disable(&dev->dev);
if (pdata == &ohci_platform_defaults)
dev->dev.platform_data = NULL;
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int ohci_platform_suspend(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct usb_ohci_pdata *pdata = dev->platform_data;
struct platform_device *pdev = to_platform_device(dev);
bool do_wakeup = device_may_wakeup(dev);
int ret;
ret = ohci_suspend(hcd, do_wakeup);
if (ret)
return ret;
if (pdata->power_suspend)
pdata->power_suspend(pdev);
return ret;
}
static int ohci_platform_resume(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct usb_ohci_pdata *pdata = dev_get_platdata(dev);
struct platform_device *pdev = to_platform_device(dev);
if (pdata->power_on) {
int err = pdata->power_on(pdev);
if (err < 0)
return err;
}
ohci_resume(hcd, false);
return 0;
}
#endif /* CONFIG_PM_SLEEP */
static const struct of_device_id ohci_platform_ids[] = {
{ .compatible = "generic-ohci", },
{ .compatible = "cavium,octeon-6335-ohci", },
{ .compatible = "ti,ohci-omap3", },
{ }
};
MODULE_DEVICE_TABLE(of, ohci_platform_ids);
static const struct platform_device_id ohci_platform_table[] = {
{ "ohci-platform", 0 },
{ }
};
MODULE_DEVICE_TABLE(platform, ohci_platform_table);
static SIMPLE_DEV_PM_OPS(ohci_platform_pm_ops, ohci_platform_suspend,
ohci_platform_resume);
static struct platform_driver ohci_platform_driver = {
.id_table = ohci_platform_table,
.probe = ohci_platform_probe,
.remove = ohci_platform_remove,
.shutdown = usb_hcd_platform_shutdown,
.driver = {
.name = "ohci-platform",
.pm = &ohci_platform_pm_ops,
.of_match_table = ohci_platform_ids,
}
};
static int __init ohci_platform_init(void)
{
if (usb_disabled())
return -ENODEV;
pr_info("%s: " DRIVER_DESC "\n", hcd_name);
ohci_init_driver(&ohci_platform_hc_driver, &platform_overrides);
return platform_driver_register(&ohci_platform_driver);
}
module_init(ohci_platform_init);
static void __exit ohci_platform_cleanup(void)
{
platform_driver_unregister(&ohci_platform_driver);
}
module_exit(ohci_platform_cleanup);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Hauke Mehrtens");
MODULE_AUTHOR("Alan Stern");
MODULE_LICENSE("GPL");