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>
16 struct clk *iclk, *fclk;
20 static int ehci_sh_reset(struct usb_hcd *hcd)
22 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
25 ehci->caps = hcd->regs;
26 ehci->regs = hcd->regs + HC_LENGTH(ehci, ehci_readl(ehci,
27 &ehci->caps->hc_capbase));
29 dbg_hcs_params(ehci, "reset");
30 dbg_hcc_params(ehci, "reset");
32 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
34 ret = ehci_halt(ehci);
45 ehci_port_power(ehci, 0);
50 static const struct hc_driver ehci_sh_hc_driver = {
51 .description = hcd_name,
52 .product_desc = "SuperH EHCI",
53 .hcd_priv_size = sizeof(struct ehci_hcd),
56 * generic hardware linkage
59 .flags = HCD_USB2 | HCD_MEMORY,
62 * basic lifecycle operations
64 .reset = ehci_sh_reset,
67 .shutdown = ehci_shutdown,
70 * managing i/o requests and associated device resources
72 .urb_enqueue = ehci_urb_enqueue,
73 .urb_dequeue = ehci_urb_dequeue,
74 .endpoint_disable = ehci_endpoint_disable,
75 .endpoint_reset = ehci_endpoint_reset,
80 .get_frame_number = ehci_get_frame,
85 .hub_status_data = ehci_hub_status_data,
86 .hub_control = ehci_hub_control,
89 .bus_suspend = ehci_bus_suspend,
90 .bus_resume = ehci_bus_resume,
93 .relinquish_port = ehci_relinquish_port,
94 .port_handed_over = ehci_port_handed_over,
95 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
98 static int ehci_hcd_sh_probe(struct platform_device *pdev)
100 const struct hc_driver *driver = &ehci_sh_hc_driver;
101 struct resource *res;
102 struct ehci_sh_priv *priv;
109 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
112 "Found HC with no register addr. Check %s setup!\n",
113 dev_name(&pdev->dev));
115 goto fail_create_hcd;
118 irq = platform_get_irq(pdev, 0);
121 "Found HC with no IRQ. Check %s setup!\n",
122 dev_name(&pdev->dev));
124 goto fail_create_hcd;
128 hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
129 dev_name(&pdev->dev));
132 goto fail_create_hcd;
135 hcd->rsrc_start = res->start;
136 hcd->rsrc_len = resource_size(res);
138 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
139 driver->description)) {
140 dev_dbg(&pdev->dev, "controller already in use\n");
142 goto fail_request_resource;
145 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
146 if (hcd->regs == NULL) {
147 dev_dbg(&pdev->dev, "error mapping memory\n");
152 priv = kmalloc(sizeof(struct ehci_sh_priv), GFP_KERNEL);
154 dev_dbg(&pdev->dev, "error allocating priv data\n");
159 /* These are optional, we don't care if they fail */
160 priv->fclk = clk_get(&pdev->dev, "usb_fck");
161 if (IS_ERR(priv->fclk))
164 priv->iclk = clk_get(&pdev->dev, "usb_ick");
165 if (IS_ERR(priv->iclk))
168 clk_enable(priv->fclk);
169 clk_enable(priv->iclk);
171 ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
173 dev_err(&pdev->dev, "Failed to add hcd");
178 platform_set_drvdata(pdev, priv);
183 clk_disable(priv->iclk);
184 clk_disable(priv->fclk);
193 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
194 fail_request_resource:
197 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
202 static int __exit ehci_hcd_sh_remove(struct platform_device *pdev)
204 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
205 struct usb_hcd *hcd = priv->hcd;
209 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
211 platform_set_drvdata(pdev, NULL);
213 clk_disable(priv->fclk);
214 clk_disable(priv->iclk);
224 static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
226 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
227 struct usb_hcd *hcd = priv->hcd;
229 if (hcd->driver->shutdown)
230 hcd->driver->shutdown(hcd);
233 static struct platform_driver ehci_hcd_sh_driver = {
234 .probe = ehci_hcd_sh_probe,
235 .remove = __exit_p(ehci_hcd_sh_remove),
236 .shutdown = ehci_hcd_sh_shutdown,
239 .owner = THIS_MODULE,
243 MODULE_ALIAS("platform:sh_ehci");