1 // SPDX-License-Identifier: GPL-2.0
3  * xhci-plat.c - xHCI host controller driver platform Bus Glue.
5  * Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com
12 #include <linux/dma-mapping.h>
18 #include <linux/usb/phy.h>
21 #include <linux/usb/of.h>
24 #include "xhci-plat.h"
25 #include "xhci-mvebu.h"
26 #include "xhci-rcar.h"
43 	if (priv->plat_start)  in xhci_priv_plat_start()
44 		priv->plat_start(hcd);  in xhci_priv_plat_start()
51 	if (!priv->init_quirk)  in xhci_priv_init_quirk()
54 	return priv->init_quirk(hcd);  in xhci_priv_init_quirk()
61 	if (!priv->suspend_quirk)  in xhci_priv_suspend_quirk()
64 	return priv->suspend_quirk(hcd);  in xhci_priv_suspend_quirk()
71 	if (!priv->resume_quirk)  in xhci_priv_resume_quirk()
74 	return priv->resume_quirk(hcd);  in xhci_priv_resume_quirk()
86 	xhci->quirks |= XHCI_PLAT | priv->quirks;  in xhci_plat_quirks()
131 		.compatible = "generic-xhci",
133 		.compatible = "xhci-platform",
135 		.compatible = "marvell,armada-375-xhci",
138 		.compatible = "marvell,armada-380-xhci",
141 		.compatible = "marvell,armada3700-xhci",
144 		.compatible = "renesas,xhci-r8a7790",
147 		.compatible = "renesas,xhci-r8a7791",
150 		.compatible = "renesas,xhci-r8a7793",
153 		.compatible = "renesas,xhci-r8a7795",
156 		.compatible = "renesas,xhci-r8a7796",
159 		.compatible = "renesas,rcar-gen2-xhci",
162 		.compatible = "renesas,rcar-gen3-xhci",
165 		.compatible = "brcm,xhci-brcm-v2",
168 		.compatible = "brcm,bcm7445-xhci",
190 		return -ENODEV;  in xhci_plat_probe()
202 	 * 2. xhci_plat is child of a device from firmware (dwc3-plat)  in xhci_plat_probe()
203 	 * 3. xhci_plat is grandchild of a pci device (dwc3-pci)  in xhci_plat_probe()
205 	for (sysdev = &pdev->dev; sysdev; sysdev = sysdev->parent) {  in xhci_plat_probe()
206 		if (is_of_node(sysdev->fwnode) ||  in xhci_plat_probe()
207 			is_acpi_device_node(sysdev->fwnode))  in xhci_plat_probe()
210 		else if (sysdev->bus == &pci_bus_type)  in xhci_plat_probe()
216 		sysdev = &pdev->dev;  in xhci_plat_probe()
218 	if (WARN_ON(!sysdev->dma_mask))  in xhci_plat_probe()
226 	pm_runtime_set_active(&pdev->dev);  in xhci_plat_probe()
227 	pm_runtime_enable(&pdev->dev);  in xhci_plat_probe()
228 	pm_runtime_get_noresume(&pdev->dev);  in xhci_plat_probe()
230 	hcd = __usb_create_hcd(driver, sysdev, &pdev->dev,  in xhci_plat_probe()
231 			       dev_name(&pdev->dev), NULL);  in xhci_plat_probe()
233 		ret = -ENOMEM;  in xhci_plat_probe()
237 	hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);  in xhci_plat_probe()
238 	if (IS_ERR(hcd->regs)) {  in xhci_plat_probe()
239 		ret = PTR_ERR(hcd->regs);  in xhci_plat_probe()
243 	hcd->rsrc_start = res->start;  in xhci_plat_probe()
244 	hcd->rsrc_len = resource_size(res);  in xhci_plat_probe()
248 	xhci->allow_single_roothub = 1;  in xhci_plat_probe()
254 	xhci->reg_clk = devm_clk_get_optional(&pdev->dev, "reg");  in xhci_plat_probe()
255 	if (IS_ERR(xhci->reg_clk)) {  in xhci_plat_probe()
256 		ret = PTR_ERR(xhci->reg_clk);  in xhci_plat_probe()
260 	ret = clk_prepare_enable(xhci->reg_clk);  in xhci_plat_probe()
264 	xhci->clk = devm_clk_get_optional(&pdev->dev, NULL);  in xhci_plat_probe()
265 	if (IS_ERR(xhci->clk)) {  in xhci_plat_probe()
266 		ret = PTR_ERR(xhci->clk);  in xhci_plat_probe()
270 	ret = clk_prepare_enable(xhci->clk);  in xhci_plat_probe()
274 	if (pdev->dev.of_node)  in xhci_plat_probe()
275 		priv_match = of_device_get_match_data(&pdev->dev);  in xhci_plat_probe()
277 		priv_match = dev_get_platdata(&pdev->dev);  in xhci_plat_probe()
285 	device_set_wakeup_capable(&pdev->dev, true);  in xhci_plat_probe()
287 	xhci->main_hcd = hcd;  in xhci_plat_probe()
290 	xhci->imod_interval = 40000;  in xhci_plat_probe()
293 	for (tmpdev = &pdev->dev; tmpdev; tmpdev = tmpdev->parent) {  in xhci_plat_probe()
295 		if (device_property_read_bool(tmpdev, "usb2-lpm-disable"))  in xhci_plat_probe()
296 			xhci->quirks |= XHCI_HW_LPM_DISABLE;  in xhci_plat_probe()
298 		if (device_property_read_bool(tmpdev, "usb3-lpm-capable"))  in xhci_plat_probe()
299 			xhci->quirks |= XHCI_LPM_SUPPORT;  in xhci_plat_probe()
301 		if (device_property_read_bool(tmpdev, "quirk-broken-port-ped"))  in xhci_plat_probe()
302 			xhci->quirks |= XHCI_BROKEN_PORT_PED;  in xhci_plat_probe()
304 		device_property_read_u32(tmpdev, "imod-interval-ns",  in xhci_plat_probe()
305 					 &xhci->imod_interval);  in xhci_plat_probe()
308 	hcd->usb_phy = devm_usb_get_phy_by_phandle(sysdev, "usb-phy", 0);  in xhci_plat_probe()
309 	if (IS_ERR(hcd->usb_phy)) {  in xhci_plat_probe()
310 		ret = PTR_ERR(hcd->usb_phy);  in xhci_plat_probe()
311 		if (ret == -EPROBE_DEFER)  in xhci_plat_probe()
313 		hcd->usb_phy = NULL;  in xhci_plat_probe()
315 		ret = usb_phy_init(hcd->usb_phy);  in xhci_plat_probe()
320 	hcd->tpl_support = of_usb_host_tpl_support(sysdev->of_node);  in xhci_plat_probe()
322 	if (priv && (priv->quirks & XHCI_SKIP_PHY_INIT))  in xhci_plat_probe()
323 		hcd->skip_phy_initialization = 1;  in xhci_plat_probe()
325 	if (priv && (priv->quirks & XHCI_SG_TRB_CACHE_SIZE_QUIRK))  in xhci_plat_probe()
326 		xhci->quirks |= XHCI_SG_TRB_CACHE_SIZE_QUIRK;  in xhci_plat_probe()
333 		xhci->shared_hcd = __usb_create_hcd(driver, sysdev, &pdev->dev,  in xhci_plat_probe()
334 						    dev_name(&pdev->dev), hcd);  in xhci_plat_probe()
335 		if (!xhci->shared_hcd) {  in xhci_plat_probe()
336 			ret = -ENOMEM;  in xhci_plat_probe()
340 		xhci->shared_hcd->tpl_support = hcd->tpl_support;  in xhci_plat_probe()
344 	if (usb3_hcd && HCC_MAX_PSA(xhci->hcc_params) >= 4)  in xhci_plat_probe()
345 		usb3_hcd->can_do_streams = 1;  in xhci_plat_probe()
347 	if (xhci->shared_hcd) {  in xhci_plat_probe()
348 		ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);  in xhci_plat_probe()
353 	device_enable_async_suspend(&pdev->dev);  in xhci_plat_probe()
354 	pm_runtime_put_noidle(&pdev->dev);  in xhci_plat_probe()
360 	pm_runtime_forbid(&pdev->dev);  in xhci_plat_probe()
366 	usb_put_hcd(xhci->shared_hcd);  in xhci_plat_probe()
372 	usb_phy_shutdown(hcd->usb_phy);  in xhci_plat_probe()
375 	clk_disable_unprepare(xhci->clk);  in xhci_plat_probe()
378 	clk_disable_unprepare(xhci->reg_clk);  in xhci_plat_probe()
384 	pm_runtime_put_noidle(&pdev->dev);  in xhci_plat_probe()
385 	pm_runtime_disable(&pdev->dev);  in xhci_plat_probe()
394 	struct clk *clk = xhci->clk;  in xhci_plat_remove()
395 	struct clk *reg_clk = xhci->reg_clk;  in xhci_plat_remove()
396 	struct usb_hcd *shared_hcd = xhci->shared_hcd;  in xhci_plat_remove()
398 	pm_runtime_get_sync(&dev->dev);  in xhci_plat_remove()
399 	xhci->xhc_state |= XHCI_STATE_REMOVING;  in xhci_plat_remove()
403 		xhci->shared_hcd = NULL;  in xhci_plat_remove()
406 	usb_phy_shutdown(hcd->usb_phy);  in xhci_plat_remove()
417 	pm_runtime_disable(&dev->dev);  in xhci_plat_remove()
418 	pm_runtime_put_noidle(&dev->dev);  in xhci_plat_remove()
419 	pm_runtime_set_suspended(&dev->dev);  in xhci_plat_remove()
444 	if (!device_may_wakeup(dev) && (xhci->quirks & XHCI_SUSPEND_RESUME_CLKS)) {  in xhci_plat_suspend()
445 		clk_disable_unprepare(xhci->clk);  in xhci_plat_suspend()
446 		clk_disable_unprepare(xhci->reg_clk);  in xhci_plat_suspend()
458 	if (!device_may_wakeup(dev) && (xhci->quirks & XHCI_SUSPEND_RESUME_CLKS)) {  in xhci_plat_resume()
459 		clk_prepare_enable(xhci->clk);  in xhci_plat_resume()
460 		clk_prepare_enable(xhci->reg_clk);  in xhci_plat_resume()
509 	/* XHCI-compliant USB Controller */
521 		.name = "xhci-hcd",
527 MODULE_ALIAS("platform:xhci-hcd");