2 * xhci-plat.c - xHCI host controller driver platform Bus Glue.
4 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
5 * Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
7 * A lot of code borrowed from the Linux xHCI driver.
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * version 2 as published by the Free Software Foundation.
14 #include <linux/clk.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/module.h>
18 #include <linux/platform_device.h>
19 #include <linux/slab.h>
20 #include <linux/usb/xhci_pdriver.h>
23 #include "xhci-mvebu.h"
24 #include "xhci-rcar.h"
26 static struct hc_driver __read_mostly xhci_plat_hc_driver;
28 static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
31 * As of now platform drivers don't provide MSI support so we ensure
32 * here that the generic code does not try to make a pci_dev from our
33 * dev struct in order to setup MSI
35 xhci->quirks |= XHCI_PLAT;
38 /* called during probe() after chip reset completes */
39 static int xhci_plat_setup(struct usb_hcd *hcd)
41 struct device_node *of_node = hcd->self.controller->of_node;
44 if (of_device_is_compatible(of_node, "renesas,xhci-r8a7790") ||
45 of_device_is_compatible(of_node, "renesas,xhci-r8a7791")) {
46 ret = xhci_rcar_init_quirk(hcd);
51 return xhci_gen_setup(hcd, xhci_plat_quirks);
54 static int xhci_plat_start(struct usb_hcd *hcd)
56 struct device_node *of_node = hcd->self.controller->of_node;
58 if (of_device_is_compatible(of_node, "renesas,xhci-r8a7790") ||
59 of_device_is_compatible(of_node, "renesas,xhci-r8a7791"))
65 static int xhci_plat_probe(struct platform_device *pdev)
67 struct device_node *node = pdev->dev.of_node;
68 struct usb_xhci_pdata *pdata = dev_get_platdata(&pdev->dev);
69 const struct hc_driver *driver;
70 struct xhci_hcd *xhci;
80 driver = &xhci_plat_hc_driver;
82 irq = platform_get_irq(pdev, 0);
87 if (of_device_is_compatible(pdev->dev.of_node,
88 "marvell,armada-375-xhci") ||
89 of_device_is_compatible(pdev->dev.of_node,
90 "marvell,armada-380-xhci")) {
91 ret = xhci_mvebu_mbus_init_quirk(pdev);
96 /* Initialize dma_mask and coherent_dma_mask to 32-bits */
97 ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
100 if (!pdev->dev.dma_mask)
101 pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
103 dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
105 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
109 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
110 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
111 if (IS_ERR(hcd->regs)) {
112 ret = PTR_ERR(hcd->regs);
116 hcd->rsrc_start = res->start;
117 hcd->rsrc_len = resource_size(res);
120 * Not all platforms have a clk so it is not an error if the
121 * clock does not exists.
123 clk = devm_clk_get(&pdev->dev, NULL);
125 ret = clk_prepare_enable(clk);
130 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
134 device_wakeup_enable(hcd->self.controller);
136 /* USB 2.0 roothub is stored in the platform_device now. */
137 hcd = platform_get_drvdata(pdev);
138 xhci = hcd_to_xhci(hcd);
140 xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
141 dev_name(&pdev->dev), hcd);
142 if (!xhci->shared_hcd) {
144 goto dealloc_usb2_hcd;
147 if ((node && of_property_read_bool(node, "usb3-lpm-capable")) ||
148 (pdata && pdata->usb3_lpm_capable))
149 xhci->quirks |= XHCI_LPM_SUPPORT;
151 * Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset)
152 * is called by usb_add_hcd().
154 *((struct xhci_hcd **) xhci->shared_hcd->hcd_priv) = xhci;
156 if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
157 xhci->shared_hcd->can_do_streams = 1;
159 ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
166 usb_put_hcd(xhci->shared_hcd);
173 clk_disable_unprepare(clk);
181 static int xhci_plat_remove(struct platform_device *dev)
183 struct usb_hcd *hcd = platform_get_drvdata(dev);
184 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
185 struct clk *clk = xhci->clk;
187 usb_remove_hcd(xhci->shared_hcd);
188 usb_put_hcd(xhci->shared_hcd);
192 clk_disable_unprepare(clk);
199 #ifdef CONFIG_PM_SLEEP
200 static int xhci_plat_suspend(struct device *dev)
202 struct usb_hcd *hcd = dev_get_drvdata(dev);
203 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
206 * xhci_suspend() needs `do_wakeup` to know whether host is allowed
207 * to do wakeup during suspend. Since xhci_plat_suspend is currently
208 * only designed for system suspend, device_may_wakeup() is enough
209 * to dertermine whether host is allowed to do wakeup. Need to
210 * reconsider this when xhci_plat_suspend enlarges its scope, e.g.,
211 * also applies to runtime suspend.
213 return xhci_suspend(xhci, device_may_wakeup(dev));
216 static int xhci_plat_resume(struct device *dev)
218 struct usb_hcd *hcd = dev_get_drvdata(dev);
219 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
221 return xhci_resume(xhci, 0);
224 static const struct dev_pm_ops xhci_plat_pm_ops = {
225 SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
227 #define DEV_PM_OPS (&xhci_plat_pm_ops)
229 #define DEV_PM_OPS NULL
230 #endif /* CONFIG_PM */
233 static const struct of_device_id usb_xhci_of_match[] = {
234 { .compatible = "generic-xhci" },
235 { .compatible = "xhci-platform" },
236 { .compatible = "marvell,armada-375-xhci"},
237 { .compatible = "marvell,armada-380-xhci"},
238 { .compatible = "renesas,xhci-r8a7790"},
239 { .compatible = "renesas,xhci-r8a7791"},
242 MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
245 static struct platform_driver usb_xhci_driver = {
246 .probe = xhci_plat_probe,
247 .remove = xhci_plat_remove,
251 .of_match_table = of_match_ptr(usb_xhci_of_match),
254 MODULE_ALIAS("platform:xhci-hcd");
256 static int __init xhci_plat_init(void)
258 xhci_init_driver(&xhci_plat_hc_driver, xhci_plat_setup);
259 xhci_plat_hc_driver.start = xhci_plat_start;
260 return platform_driver_register(&usb_xhci_driver);
262 module_init(xhci_plat_init);
264 static void __exit xhci_plat_exit(void)
266 platform_driver_unregister(&usb_xhci_driver);
268 module_exit(xhci_plat_exit);
270 MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
271 MODULE_LICENSE("GPL");