2 * SuperH EHCI host controller driver
4 * Copyright (C) 2010 Paul Mundt
6 * Based on ohci-sh.c and ehci-atmel.c.
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
12 #include <linux/platform_device.h>
13 #include <linux/clk.h>
14 #include <linux/platform_data/ehci-sh.h>
17 struct clk *iclk, *fclk;
21 static int ehci_sh_reset(struct usb_hcd *hcd)
23 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
25 ehci->caps = hcd->regs;
27 return ehci_setup(hcd);
30 static const struct hc_driver ehci_sh_hc_driver = {
31 .description = hcd_name,
32 .product_desc = "SuperH EHCI",
33 .hcd_priv_size = sizeof(struct ehci_hcd),
36 * generic hardware linkage
39 .flags = HCD_USB2 | HCD_MEMORY | HCD_BH,
42 * basic lifecycle operations
44 .reset = ehci_sh_reset,
47 .shutdown = ehci_shutdown,
50 * managing i/o requests and associated device resources
52 .urb_enqueue = ehci_urb_enqueue,
53 .urb_dequeue = ehci_urb_dequeue,
54 .endpoint_disable = ehci_endpoint_disable,
55 .endpoint_reset = ehci_endpoint_reset,
60 .get_frame_number = ehci_get_frame,
65 .hub_status_data = ehci_hub_status_data,
66 .hub_control = ehci_hub_control,
69 .bus_suspend = ehci_bus_suspend,
70 .bus_resume = ehci_bus_resume,
73 .relinquish_port = ehci_relinquish_port,
74 .port_handed_over = ehci_port_handed_over,
75 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
78 static int ehci_hcd_sh_probe(struct platform_device *pdev)
81 struct ehci_sh_priv *priv;
82 struct ehci_sh_platdata *pdata;
89 irq = platform_get_irq(pdev, 0);
92 "Found HC with no IRQ. Check %s setup!\n",
93 dev_name(&pdev->dev));
98 pdata = dev_get_platdata(&pdev->dev);
101 hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
102 dev_name(&pdev->dev));
105 goto fail_create_hcd;
108 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
109 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
110 if (IS_ERR(hcd->regs)) {
111 ret = PTR_ERR(hcd->regs);
112 goto fail_request_resource;
114 hcd->rsrc_start = res->start;
115 hcd->rsrc_len = resource_size(res);
117 priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv),
121 goto fail_request_resource;
124 /* These are optional, we don't care if they fail */
125 priv->fclk = devm_clk_get(&pdev->dev, "usb_fck");
126 if (IS_ERR(priv->fclk))
129 priv->iclk = devm_clk_get(&pdev->dev, "usb_ick");
130 if (IS_ERR(priv->iclk))
133 clk_enable(priv->fclk);
134 clk_enable(priv->iclk);
136 if (pdata && pdata->phy_init)
139 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
141 dev_err(&pdev->dev, "Failed to add hcd");
144 device_wakeup_enable(hcd->self.controller);
147 platform_set_drvdata(pdev, priv);
152 clk_disable(priv->iclk);
153 clk_disable(priv->fclk);
155 fail_request_resource:
158 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
163 static int ehci_hcd_sh_remove(struct platform_device *pdev)
165 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
166 struct usb_hcd *hcd = priv->hcd;
171 clk_disable(priv->fclk);
172 clk_disable(priv->iclk);
177 static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
179 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
180 struct usb_hcd *hcd = priv->hcd;
182 if (hcd->driver->shutdown)
183 hcd->driver->shutdown(hcd);
186 static struct platform_driver ehci_hcd_sh_driver = {
187 .probe = ehci_hcd_sh_probe,
188 .remove = ehci_hcd_sh_remove,
189 .shutdown = ehci_hcd_sh_shutdown,
195 MODULE_ALIAS("platform:sh_ehci");