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 void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
29 * As of now platform drivers don't provide MSI support so we ensure
30 * here that the generic code does not try to make a pci_dev from our
31 * dev struct in order to setup MSI
33 xhci->quirks |= XHCI_PLAT;
36 /* called during probe() after chip reset completes */
37 static int xhci_plat_setup(struct usb_hcd *hcd)
39 struct device_node *of_node = hcd->self.controller->of_node;
42 if (of_device_is_compatible(of_node, "renesas,xhci-r8a7790") ||
43 of_device_is_compatible(of_node, "renesas,xhci-r8a7791")) {
44 ret = xhci_rcar_init_quirk(hcd);
49 return xhci_gen_setup(hcd, xhci_plat_quirks);
52 static int xhci_plat_start(struct usb_hcd *hcd)
54 struct device_node *of_node = hcd->self.controller->of_node;
56 if (of_device_is_compatible(of_node, "renesas,xhci-r8a7790") ||
57 of_device_is_compatible(of_node, "renesas,xhci-r8a7791"))
63 static const struct hc_driver xhci_plat_xhci_driver = {
64 .description = "xhci-hcd",
65 .product_desc = "xHCI Host Controller",
66 .hcd_priv_size = sizeof(struct xhci_hcd *),
69 * generic hardware linkage
72 .flags = HCD_MEMORY | HCD_USB3 | HCD_SHARED,
75 * basic lifecycle operations
77 .reset = xhci_plat_setup,
78 .start = xhci_plat_start,
80 .shutdown = xhci_shutdown,
83 * managing i/o requests and associated device resources
85 .urb_enqueue = xhci_urb_enqueue,
86 .urb_dequeue = xhci_urb_dequeue,
87 .alloc_dev = xhci_alloc_dev,
88 .free_dev = xhci_free_dev,
89 .alloc_streams = xhci_alloc_streams,
90 .free_streams = xhci_free_streams,
91 .add_endpoint = xhci_add_endpoint,
92 .drop_endpoint = xhci_drop_endpoint,
93 .endpoint_reset = xhci_endpoint_reset,
94 .check_bandwidth = xhci_check_bandwidth,
95 .reset_bandwidth = xhci_reset_bandwidth,
96 .address_device = xhci_address_device,
97 .enable_device = xhci_enable_device,
98 .update_hub_device = xhci_update_hub_device,
99 .reset_device = xhci_discover_or_reset_device,
104 .get_frame_number = xhci_get_frame,
106 /* Root hub support */
107 .hub_control = xhci_hub_control,
108 .hub_status_data = xhci_hub_status_data,
109 .bus_suspend = xhci_bus_suspend,
110 .bus_resume = xhci_bus_resume,
112 .enable_usb3_lpm_timeout = xhci_enable_usb3_lpm_timeout,
113 .disable_usb3_lpm_timeout = xhci_disable_usb3_lpm_timeout,
116 static int xhci_plat_probe(struct platform_device *pdev)
118 struct device_node *node = pdev->dev.of_node;
119 struct usb_xhci_pdata *pdata = dev_get_platdata(&pdev->dev);
120 const struct hc_driver *driver;
121 struct xhci_hcd *xhci;
122 struct resource *res;
131 driver = &xhci_plat_xhci_driver;
133 irq = platform_get_irq(pdev, 0);
137 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
141 if (of_device_is_compatible(pdev->dev.of_node,
142 "marvell,armada-375-xhci") ||
143 of_device_is_compatible(pdev->dev.of_node,
144 "marvell,armada-380-xhci")) {
145 ret = xhci_mvebu_mbus_init_quirk(pdev);
150 /* Initialize dma_mask and coherent_dma_mask to 32-bits */
151 ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
154 if (!pdev->dev.dma_mask)
155 pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
157 dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
159 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
163 hcd->rsrc_start = res->start;
164 hcd->rsrc_len = resource_size(res);
166 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
167 if (IS_ERR(hcd->regs)) {
168 ret = PTR_ERR(hcd->regs);
173 * Not all platforms have a clk so it is not an error if the
174 * clock does not exists.
176 clk = devm_clk_get(&pdev->dev, NULL);
178 ret = clk_prepare_enable(clk);
183 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
187 device_wakeup_enable(hcd->self.controller);
189 /* USB 2.0 roothub is stored in the platform_device now. */
190 hcd = platform_get_drvdata(pdev);
191 xhci = hcd_to_xhci(hcd);
193 xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
194 dev_name(&pdev->dev), hcd);
195 if (!xhci->shared_hcd) {
197 goto dealloc_usb2_hcd;
200 if ((node && of_property_read_bool(node, "usb3-lpm-capable")) ||
201 (pdata && pdata->usb3_lpm_capable))
202 xhci->quirks |= XHCI_LPM_SUPPORT;
204 * Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset)
205 * is called by usb_add_hcd().
207 *((struct xhci_hcd **) xhci->shared_hcd->hcd_priv) = xhci;
209 if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
210 xhci->shared_hcd->can_do_streams = 1;
212 ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
219 usb_put_hcd(xhci->shared_hcd);
226 clk_disable_unprepare(clk);
234 static int xhci_plat_remove(struct platform_device *dev)
236 struct usb_hcd *hcd = platform_get_drvdata(dev);
237 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
238 struct clk *clk = xhci->clk;
240 usb_remove_hcd(xhci->shared_hcd);
241 usb_put_hcd(xhci->shared_hcd);
245 clk_disable_unprepare(clk);
252 #ifdef CONFIG_PM_SLEEP
253 static int xhci_plat_suspend(struct device *dev)
255 struct usb_hcd *hcd = dev_get_drvdata(dev);
256 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
258 return xhci_suspend(xhci);
261 static int xhci_plat_resume(struct device *dev)
263 struct usb_hcd *hcd = dev_get_drvdata(dev);
264 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
266 return xhci_resume(xhci, 0);
269 static const struct dev_pm_ops xhci_plat_pm_ops = {
270 SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
272 #define DEV_PM_OPS (&xhci_plat_pm_ops)
274 #define DEV_PM_OPS NULL
275 #endif /* CONFIG_PM */
278 static const struct of_device_id usb_xhci_of_match[] = {
279 { .compatible = "generic-xhci" },
280 { .compatible = "xhci-platform" },
281 { .compatible = "marvell,armada-375-xhci"},
282 { .compatible = "marvell,armada-380-xhci"},
283 { .compatible = "renesas,xhci-r8a7790"},
284 { .compatible = "renesas,xhci-r8a7791"},
287 MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
290 static struct platform_driver usb_xhci_driver = {
291 .probe = xhci_plat_probe,
292 .remove = xhci_plat_remove,
296 .of_match_table = of_match_ptr(usb_xhci_of_match),
299 MODULE_ALIAS("platform:xhci-hcd");
301 int xhci_register_plat(void)
303 return platform_driver_register(&usb_xhci_driver);
306 void xhci_unregister_plat(void)
308 platform_driver_unregister(&usb_xhci_driver);