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/acpi.h>
24 #include "xhci-plat.h"
25 #include "xhci-mvebu.h"
26 #include "xhci-rcar.h"
28 static struct hc_driver __read_mostly xhci_plat_hc_driver;
30 static int xhci_plat_setup(struct usb_hcd *hcd);
31 static int xhci_plat_start(struct usb_hcd *hcd);
33 static const struct xhci_driver_overrides xhci_plat_overrides __initconst = {
34 .extra_priv_size = sizeof(struct xhci_plat_priv),
35 .reset = xhci_plat_setup,
36 .start = xhci_plat_start,
39 static void xhci_priv_plat_start(struct usb_hcd *hcd)
41 struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
44 priv->plat_start(hcd);
47 static int xhci_priv_init_quirk(struct usb_hcd *hcd)
49 struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
51 if (!priv->init_quirk)
54 return priv->init_quirk(hcd);
57 static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
60 * As of now platform drivers don't provide MSI support so we ensure
61 * here that the generic code does not try to make a pci_dev from our
62 * dev struct in order to setup MSI
64 xhci->quirks |= XHCI_PLAT;
67 /* called during probe() after chip reset completes */
68 static int xhci_plat_setup(struct usb_hcd *hcd)
73 ret = xhci_priv_init_quirk(hcd);
77 return xhci_gen_setup(hcd, xhci_plat_quirks);
80 static int xhci_plat_start(struct usb_hcd *hcd)
82 xhci_priv_plat_start(hcd);
87 static const struct xhci_plat_priv xhci_plat_marvell_armada = {
88 .init_quirk = xhci_mvebu_mbus_init_quirk,
91 static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
92 .firmware_name = XHCI_RCAR_FIRMWARE_NAME_V1,
93 .init_quirk = xhci_rcar_init_quirk,
94 .plat_start = xhci_rcar_start,
97 static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
98 .firmware_name = XHCI_RCAR_FIRMWARE_NAME_V2,
99 .init_quirk = xhci_rcar_init_quirk,
100 .plat_start = xhci_rcar_start,
103 static const struct of_device_id usb_xhci_of_match[] = {
105 .compatible = "generic-xhci",
107 .compatible = "xhci-platform",
109 .compatible = "marvell,armada-375-xhci",
110 .data = &xhci_plat_marvell_armada,
112 .compatible = "marvell,armada-380-xhci",
113 .data = &xhci_plat_marvell_armada,
115 .compatible = "renesas,xhci-r8a7790",
116 .data = &xhci_plat_renesas_rcar_gen2,
118 .compatible = "renesas,xhci-r8a7791",
119 .data = &xhci_plat_renesas_rcar_gen2,
121 .compatible = "renesas,xhci-r8a7793",
122 .data = &xhci_plat_renesas_rcar_gen2,
124 .compatible = "renesas,xhci-r8a7795",
125 .data = &xhci_plat_renesas_rcar_gen3,
127 .compatible = "renesas,rcar-gen2-xhci",
128 .data = &xhci_plat_renesas_rcar_gen2,
130 .compatible = "renesas,rcar-gen3-xhci",
131 .data = &xhci_plat_renesas_rcar_gen3,
135 MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
138 static int xhci_plat_probe(struct platform_device *pdev)
140 const struct of_device_id *match;
141 const struct hc_driver *driver;
142 struct xhci_hcd *xhci;
143 struct resource *res;
152 driver = &xhci_plat_hc_driver;
154 irq = platform_get_irq(pdev, 0);
158 /* Try to set 64-bit DMA first */
159 if (WARN_ON(!pdev->dev.dma_mask))
160 /* Platform did not initialize dma_mask */
161 ret = dma_coerce_mask_and_coherent(&pdev->dev,
164 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
166 /* If seting 64-bit DMA mask fails, fall back to 32-bit DMA mask */
168 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
173 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
177 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
178 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
179 if (IS_ERR(hcd->regs)) {
180 ret = PTR_ERR(hcd->regs);
184 hcd->rsrc_start = res->start;
185 hcd->rsrc_len = resource_size(res);
188 * Not all platforms have a clk so it is not an error if the
189 * clock does not exists.
191 clk = devm_clk_get(&pdev->dev, NULL);
193 ret = clk_prepare_enable(clk);
196 } else if (PTR_ERR(clk) == -EPROBE_DEFER) {
201 xhci = hcd_to_xhci(hcd);
202 match = of_match_node(usb_xhci_of_match, pdev->dev.of_node);
204 const struct xhci_plat_priv *priv_match = match->data;
205 struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
207 /* Just copy data for now */
212 device_wakeup_enable(hcd->self.controller);
215 xhci->main_hcd = hcd;
216 xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
217 dev_name(&pdev->dev), hcd);
218 if (!xhci->shared_hcd) {
223 if (device_property_read_bool(&pdev->dev, "usb3-lpm-capable"))
224 xhci->quirks |= XHCI_LPM_SUPPORT;
226 if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
227 xhci->shared_hcd->can_do_streams = 1;
229 hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
230 if (IS_ERR(hcd->usb_phy)) {
231 ret = PTR_ERR(hcd->usb_phy);
232 if (ret == -EPROBE_DEFER)
236 ret = usb_phy_init(hcd->usb_phy);
241 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
243 goto disable_usb_phy;
245 ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
247 goto dealloc_usb2_hcd;
256 usb_phy_shutdown(hcd->usb_phy);
259 usb_put_hcd(xhci->shared_hcd);
263 clk_disable_unprepare(clk);
271 static int xhci_plat_remove(struct platform_device *dev)
273 struct usb_hcd *hcd = platform_get_drvdata(dev);
274 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
275 struct clk *clk = xhci->clk;
277 usb_remove_hcd(xhci->shared_hcd);
278 usb_phy_shutdown(hcd->usb_phy);
281 usb_put_hcd(xhci->shared_hcd);
284 clk_disable_unprepare(clk);
290 #ifdef CONFIG_PM_SLEEP
291 static int xhci_plat_suspend(struct device *dev)
293 struct usb_hcd *hcd = dev_get_drvdata(dev);
294 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
297 * xhci_suspend() needs `do_wakeup` to know whether host is allowed
298 * to do wakeup during suspend. Since xhci_plat_suspend is currently
299 * only designed for system suspend, device_may_wakeup() is enough
300 * to dertermine whether host is allowed to do wakeup. Need to
301 * reconsider this when xhci_plat_suspend enlarges its scope, e.g.,
302 * also applies to runtime suspend.
304 return xhci_suspend(xhci, device_may_wakeup(dev));
307 static int xhci_plat_resume(struct device *dev)
309 struct usb_hcd *hcd = dev_get_drvdata(dev);
310 struct xhci_hcd *xhci = hcd_to_xhci(hcd);
312 return xhci_resume(xhci, 0);
315 static const struct dev_pm_ops xhci_plat_pm_ops = {
316 SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
318 #define DEV_PM_OPS (&xhci_plat_pm_ops)
320 #define DEV_PM_OPS NULL
321 #endif /* CONFIG_PM */
323 static const struct acpi_device_id usb_xhci_acpi_match[] = {
324 /* XHCI-compliant USB Controller */
328 MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match);
330 static struct platform_driver usb_xhci_driver = {
331 .probe = xhci_plat_probe,
332 .remove = xhci_plat_remove,
336 .of_match_table = of_match_ptr(usb_xhci_of_match),
337 .acpi_match_table = ACPI_PTR(usb_xhci_acpi_match),
340 MODULE_ALIAS("platform:xhci-hcd");
342 static int __init xhci_plat_init(void)
344 xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides);
345 return platform_driver_register(&usb_xhci_driver);
347 module_init(xhci_plat_init);
349 static void __exit xhci_plat_exit(void)
351 platform_driver_unregister(&usb_xhci_driver);
353 module_exit(xhci_plat_exit);
355 MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
356 MODULE_LICENSE("GPL");