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/usb/phy.h>
20 #include <linux/slab.h>
21 #include <linux/usb/xhci_pdriver.h>
22 #include <linux/acpi.h>
25 #include "xhci-plat.h"
26 #include "xhci-mvebu.h"
27 #include "xhci-rcar.h"
29 static struct hc_driver __read_mostly xhci_plat_hc_driver;
31 static int xhci_plat_setup(struct usb_hcd *hcd);
32 static int xhci_plat_start(struct usb_hcd *hcd);
34 static const struct xhci_driver_overrides xhci_plat_overrides __initconst = {
35 .extra_priv_size = sizeof(struct xhci_plat_priv),
36 .reset = xhci_plat_setup,
37 .start = xhci_plat_start,
40 static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
43 * As of now platform drivers don't provide MSI support so we ensure
44 * here that the generic code does not try to make a pci_dev from our
45 * dev struct in order to setup MSI
47 xhci->quirks |= XHCI_PLAT;
50 /* called during probe() after chip reset completes */
51 static int xhci_plat_setup(struct usb_hcd *hcd)
55 if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2)) {
56 ret = xhci_rcar_init_quirk(hcd);
61 return xhci_gen_setup(hcd, xhci_plat_quirks);
64 static int xhci_plat_start(struct usb_hcd *hcd)
66 if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2))
73 static const struct xhci_plat_priv xhci_plat_marvell_armada = {
74 .type = XHCI_PLAT_TYPE_MARVELL_ARMADA,
77 static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
78 .type = XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2,
81 static const struct of_device_id usb_xhci_of_match[] = {
83 .compatible = "generic-xhci",
85 .compatible = "xhci-platform",
87 .compatible = "marvell,armada-375-xhci",
88 .data = &xhci_plat_marvell_armada,
90 .compatible = "marvell,armada-380-xhci",
91 .data = &xhci_plat_marvell_armada,
93 .compatible = "renesas,xhci-r8a7790",
94 .data = &xhci_plat_renesas_rcar_gen2,
96 .compatible = "renesas,xhci-r8a7791",
97 .data = &xhci_plat_renesas_rcar_gen2,
101 MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
104 static int xhci_plat_probe(struct platform_device *pdev)
106 struct device_node *node = pdev->dev.of_node;
107 struct usb_xhci_pdata *pdata = dev_get_platdata(&pdev->dev);
108 const struct of_device_id *match;
109 const struct hc_driver *driver;
110 struct xhci_hcd *xhci;
111 struct resource *res;
120 driver = &xhci_plat_hc_driver;
122 irq = platform_get_irq(pdev, 0);
126 /* Try to set 64-bit DMA first */
127 if (WARN_ON(!pdev->dev.dma_mask))
128 /* Platform did not initialize dma_mask */
129 ret = dma_coerce_mask_and_coherent(&pdev->dev,
132 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
134 /* If seting 64-bit DMA mask fails, fall back to 32-bit DMA mask */
136 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
141 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
145 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
146 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
147 if (IS_ERR(hcd->regs)) {
148 ret = PTR_ERR(hcd->regs);
152 hcd->rsrc_start = res->start;
153 hcd->rsrc_len = resource_size(res);
156 * Not all platforms have a clk so it is not an error if the
157 * clock does not exists.
159 clk = devm_clk_get(&pdev->dev, NULL);
161 ret = clk_prepare_enable(clk);
166 xhci = hcd_to_xhci(hcd);
167 match = of_match_node(usb_xhci_of_match, node);
169 const struct xhci_plat_priv *priv_match = match->data;
170 struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
172 /* Just copy data for now */
176 if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_MARVELL_ARMADA)) {
177 ret = xhci_mvebu_mbus_init_quirk(pdev);
182 device_wakeup_enable(hcd->self.controller);
185 xhci->main_hcd = hcd;
186 xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
187 dev_name(&pdev->dev), hcd);
188 if (!xhci->shared_hcd) {
193 if ((node && of_property_read_bool(node, "usb3-lpm-capable")) ||
194 (pdata && pdata->usb3_lpm_capable))
195 xhci->quirks |= XHCI_LPM_SUPPORT;
197 if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
198 xhci->shared_hcd->can_do_streams = 1;
200 hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
201 if (IS_ERR(hcd->usb_phy)) {
202 ret = PTR_ERR(hcd->usb_phy);
203 if (ret == -EPROBE_DEFER)
207 ret = usb_phy_init(hcd->usb_phy);
212 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
214 goto disable_usb_phy;
216 ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
218 goto dealloc_usb2_hcd;
227 usb_phy_shutdown(hcd->usb_phy);
230 usb_put_hcd(xhci->shared_hcd);
234 clk_disable_unprepare(clk);
242 static int xhci_plat_remove(struct platform_device *dev)
244 struct usb_hcd *hcd = platform_get_drvdata(dev);
245 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
246 struct clk *clk = xhci->clk;
248 usb_remove_hcd(xhci->shared_hcd);
249 usb_phy_shutdown(hcd->usb_phy);
252 usb_put_hcd(xhci->shared_hcd);
255 clk_disable_unprepare(clk);
261 #ifdef CONFIG_PM_SLEEP
262 static int xhci_plat_suspend(struct device *dev)
264 struct usb_hcd *hcd = dev_get_drvdata(dev);
265 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
268 * xhci_suspend() needs `do_wakeup` to know whether host is allowed
269 * to do wakeup during suspend. Since xhci_plat_suspend is currently
270 * only designed for system suspend, device_may_wakeup() is enough
271 * to dertermine whether host is allowed to do wakeup. Need to
272 * reconsider this when xhci_plat_suspend enlarges its scope, e.g.,
273 * also applies to runtime suspend.
275 return xhci_suspend(xhci, device_may_wakeup(dev));
278 static int xhci_plat_resume(struct device *dev)
280 struct usb_hcd *hcd = dev_get_drvdata(dev);
281 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
283 return xhci_resume(xhci, 0);
286 static const struct dev_pm_ops xhci_plat_pm_ops = {
287 SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
289 #define DEV_PM_OPS (&xhci_plat_pm_ops)
291 #define DEV_PM_OPS NULL
292 #endif /* CONFIG_PM */
294 static const struct acpi_device_id usb_xhci_acpi_match[] = {
295 /* XHCI-compliant USB Controller */
299 MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match);
301 static struct platform_driver usb_xhci_driver = {
302 .probe = xhci_plat_probe,
303 .remove = xhci_plat_remove,
307 .of_match_table = of_match_ptr(usb_xhci_of_match),
308 .acpi_match_table = ACPI_PTR(usb_xhci_acpi_match),
311 MODULE_ALIAS("platform:xhci-hcd");
313 static int __init xhci_plat_init(void)
315 xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides);
316 return platform_driver_register(&usb_xhci_driver);
318 module_init(xhci_plat_init);
320 static void __exit xhci_plat_exit(void)
322 platform_driver_unregister(&usb_xhci_driver);
324 module_exit(xhci_plat_exit);
326 MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
327 MODULE_LICENSE("GPL");