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// SPDX-License-Identifier: GPL-2.0
/*
* SuperH EHCI host controller driver
*
* Copyright (C) 2010 Paul Mundt
*
* Based on ohci-sh.c and ehci-atmel.c.
*/
#include <linux/platform_device.h>
#include <linux/clk.h>
struct ehci_sh_priv {
struct clk *iclk, *fclk;
struct usb_hcd *hcd;
};
static int ehci_sh_reset(struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
ehci->caps = hcd->regs;
return ehci_setup(hcd);
}
static const struct hc_driver ehci_sh_hc_driver = {
.description = hcd_name,
.product_desc = "SuperH EHCI",
.hcd_priv_size = sizeof(struct ehci_hcd),
/*
* generic hardware linkage
*/
.irq = ehci_irq,
.flags = HCD_USB2 | HCD_DMA | HCD_MEMORY | HCD_BH,
/*
* basic lifecycle operations
*/
.reset = ehci_sh_reset,
.start = ehci_run,
.stop = ehci_stop,
.shutdown = ehci_shutdown,
/*
* managing i/o requests and associated device resources
*/
.urb_enqueue = ehci_urb_enqueue,
.urb_dequeue = ehci_urb_dequeue,
.endpoint_disable = ehci_endpoint_disable,
.endpoint_reset = ehci_endpoint_reset,
/*
* scheduling support
*/
.get_frame_number = ehci_get_frame,
/*
* root hub support
*/
.hub_status_data = ehci_hub_status_data,
.hub_control = ehci_hub_control,
#ifdef CONFIG_PM
.bus_suspend = ehci_bus_suspend,
.bus_resume = ehci_bus_resume,
#endif
.relinquish_port = ehci_relinquish_port,
.port_handed_over = ehci_port_handed_over,
.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
};
static int ehci_hcd_sh_probe(struct platform_device *pdev)
{
struct resource *res;
struct ehci_sh_priv *priv;
struct usb_hcd *hcd;
int irq, ret;
if (usb_disabled())
return -ENODEV;
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
ret = irq;
goto fail_create_hcd;
}
/* initialize hcd */
hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
dev_name(&pdev->dev));
if (!hcd) {
ret = -ENOMEM;
goto fail_create_hcd;
}
hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
if (IS_ERR(hcd->regs)) {
ret = PTR_ERR(hcd->regs);
goto fail_request_resource;
}
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv),
GFP_KERNEL);
if (!priv) {
ret = -ENOMEM;
goto fail_request_resource;
}
/* These are optional, we don't care if they fail */
priv->fclk = devm_clk_get(&pdev->dev, "usb_fck");
if (IS_ERR(priv->fclk))
priv->fclk = NULL;
priv->iclk = devm_clk_get(&pdev->dev, "usb_ick");
if (IS_ERR(priv->iclk))
priv->iclk = NULL;
clk_enable(priv->fclk);
clk_enable(priv->iclk);
ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (ret != 0) {
dev_err(&pdev->dev, "Failed to add hcd");
goto fail_add_hcd;
}
device_wakeup_enable(hcd->self.controller);
priv->hcd = hcd;
platform_set_drvdata(pdev, priv);
return ret;
fail_add_hcd:
clk_disable(priv->iclk);
clk_disable(priv->fclk);
fail_request_resource:
usb_put_hcd(hcd);
fail_create_hcd:
dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
return ret;
}
static void ehci_hcd_sh_remove(struct platform_device *pdev)
{
struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
struct usb_hcd *hcd = priv->hcd;
usb_remove_hcd(hcd);
usb_put_hcd(hcd);
clk_disable(priv->fclk);
clk_disable(priv->iclk);
}
static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
{
struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
struct usb_hcd *hcd = priv->hcd;
if (hcd->driver->shutdown)
hcd->driver->shutdown(hcd);
}
static struct platform_driver ehci_hcd_sh_driver = {
.probe = ehci_hcd_sh_probe,
.remove_new = ehci_hcd_sh_remove,
.shutdown = ehci_hcd_sh_shutdown,
.driver = {
.name = "sh_ehci",
},
};
MODULE_ALIAS("platform:sh_ehci");
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