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);
26 ehci->caps = hcd->regs;
27 ehci->regs = hcd->regs + HC_LENGTH(ehci, ehci_readl(ehci,
28 &ehci->caps->hc_capbase));
30 dbg_hcs_params(ehci, "reset");
31 dbg_hcc_params(ehci, "reset");
33 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
35 ret = ehci_halt(ehci);
46 ehci_port_power(ehci, 0);
51 static const struct hc_driver ehci_sh_hc_driver = {
52 .description = hcd_name,
53 .product_desc = "SuperH EHCI",
54 .hcd_priv_size = sizeof(struct ehci_hcd),
57 * generic hardware linkage
60 .flags = HCD_USB2 | HCD_MEMORY,
63 * basic lifecycle operations
65 .reset = ehci_sh_reset,
68 .shutdown = ehci_shutdown,
71 * managing i/o requests and associated device resources
73 .urb_enqueue = ehci_urb_enqueue,
74 .urb_dequeue = ehci_urb_dequeue,
75 .endpoint_disable = ehci_endpoint_disable,
76 .endpoint_reset = ehci_endpoint_reset,
81 .get_frame_number = ehci_get_frame,
86 .hub_status_data = ehci_hub_status_data,
87 .hub_control = ehci_hub_control,
90 .bus_suspend = ehci_bus_suspend,
91 .bus_resume = ehci_bus_resume,
94 .relinquish_port = ehci_relinquish_port,
95 .port_handed_over = ehci_port_handed_over,
96 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
99 static int ehci_hcd_sh_probe(struct platform_device *pdev)
101 const struct hc_driver *driver = &ehci_sh_hc_driver;
102 struct resource *res;
103 struct ehci_sh_priv *priv;
104 struct ehci_sh_platdata *pdata;
111 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
114 "Found HC with no register addr. Check %s setup!\n",
115 dev_name(&pdev->dev));
117 goto fail_create_hcd;
120 irq = platform_get_irq(pdev, 0);
123 "Found HC with no IRQ. Check %s setup!\n",
124 dev_name(&pdev->dev));
126 goto fail_create_hcd;
129 pdata = pdev->dev.platform_data;
132 hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
133 dev_name(&pdev->dev));
136 goto fail_create_hcd;
139 hcd->rsrc_start = res->start;
140 hcd->rsrc_len = resource_size(res);
142 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
143 driver->description)) {
144 dev_dbg(&pdev->dev, "controller already in use\n");
146 goto fail_request_resource;
149 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
150 if (hcd->regs == NULL) {
151 dev_dbg(&pdev->dev, "error mapping memory\n");
156 priv = kmalloc(sizeof(struct ehci_sh_priv), GFP_KERNEL);
158 dev_dbg(&pdev->dev, "error allocating priv data\n");
163 /* These are optional, we don't care if they fail */
164 priv->fclk = clk_get(&pdev->dev, "usb_fck");
165 if (IS_ERR(priv->fclk))
168 priv->iclk = clk_get(&pdev->dev, "usb_ick");
169 if (IS_ERR(priv->iclk))
172 clk_enable(priv->fclk);
173 clk_enable(priv->iclk);
175 if (pdata && pdata->phy_init)
178 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
180 dev_err(&pdev->dev, "Failed to add hcd");
185 platform_set_drvdata(pdev, priv);
190 clk_disable(priv->iclk);
191 clk_disable(priv->fclk);
200 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
201 fail_request_resource:
204 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
209 static int __exit ehci_hcd_sh_remove(struct platform_device *pdev)
211 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
212 struct usb_hcd *hcd = priv->hcd;
216 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
218 platform_set_drvdata(pdev, NULL);
220 clk_disable(priv->fclk);
221 clk_disable(priv->iclk);
231 static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
233 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
234 struct usb_hcd *hcd = priv->hcd;
236 if (hcd->driver->shutdown)
237 hcd->driver->shutdown(hcd);
240 static struct platform_driver ehci_hcd_sh_driver = {
241 .probe = ehci_hcd_sh_probe,
242 .remove = __exit_p(ehci_hcd_sh_remove),
243 .shutdown = ehci_hcd_sh_shutdown,
246 .owner = THIS_MODULE,
250 MODULE_ALIAS("platform:sh_ehci");