1 // SPDX-License-Identifier: GPL-2.0+
3  * ehci-omap.c - driver for USBHOST on OMAP3/4 processors
5  * Bus Glue for the EHCI controllers in OMAP3/4
8  * Copyright (C) 2007-2013 Texas Instruments, Inc.
17  * Based on "ehci-fsl.c" and "ehci-au1xxx.c" ehci glue layers
25 #include <linux/usb/ulpi.h>
28 #include <linux/usb.h>
29 #include <linux/usb/hcd.h>
31 #include <linux/dma-mapping.h>
33 #include "ehci.h"
35 #include <linux/platform_data/usb-omap.h>
37 /* EHCI Register Set */
48 #define DRIVER_DESC "OMAP-EHCI Host Controller driver"
50 static const char hcd_name[] = "ehci-omap";
52 /*-------------------------------------------------------------------------*/
74  * ehci_hcd_omap_probe - initialize TI-based HCDs
77  * Allocates basic resources for this USB host controller, and
83 	struct device *dev = &pdev->dev;  in ehci_hcd_omap_probe()
94 		return -ENODEV;  in ehci_hcd_omap_probe()
96 	if (!dev->parent) {  in ehci_hcd_omap_probe()
98 		return -ENODEV;  in ehci_hcd_omap_probe()
102 	if (dev->of_node) {  in ehci_hcd_omap_probe()
103 		pdata = dev_get_platdata(dev->parent);  in ehci_hcd_omap_probe()
104 		dev->platform_data = pdata;  in ehci_hcd_omap_probe()
109 		return -ENODEV;  in ehci_hcd_omap_probe()
121 	 * Right now device-tree probed devices don't get dma_mask set.  in ehci_hcd_omap_probe()
122 	 * Since shared usb code relies on it, set it here for now.  in ehci_hcd_omap_probe()
129 	ret = -ENODEV;  in ehci_hcd_omap_probe()
134 		return -ENOMEM;  in ehci_hcd_omap_probe()
137 	hcd->rsrc_start = res->start;  in ehci_hcd_omap_probe()
138 	hcd->rsrc_len = resource_size(res);  in ehci_hcd_omap_probe()
139 	hcd->regs = regs;  in ehci_hcd_omap_probe()
140 	hcd_to_ehci(hcd)->caps = regs;  in ehci_hcd_omap_probe()
142 	omap = (struct omap_hcd *)hcd_to_ehci(hcd)->priv;  in ehci_hcd_omap_probe()
143 	omap->nports = pdata->nports;  in ehci_hcd_omap_probe()
148 	for (i = 0 ; i < omap->nports ; i++) {  in ehci_hcd_omap_probe()
155 			if (ret == -ENODEV) { /* no PHY */  in ehci_hcd_omap_probe()
160 			if (ret != -EPROBE_DEFER)  in ehci_hcd_omap_probe()
166 		omap->phy[i] = phy;  in ehci_hcd_omap_probe()
168 		if (pdata->port_mode[i] == OMAP_EHCI_PORT_MODE_PHY) {  in ehci_hcd_omap_probe()
169 			usb_phy_init(omap->phy[i]);  in ehci_hcd_omap_probe()
171 			usb_phy_set_suspend(omap->phy[i], 0);  in ehci_hcd_omap_probe()
179 	 * An undocumented "feature" in the OMAP3 EHCI controller,  in ehci_hcd_omap_probe()
183 	 * This breaks suspend-resume if the root-hub is allowed  in ehci_hcd_omap_probe()
195 	device_wakeup_enable(hcd->self.controller);  in ehci_hcd_omap_probe()
199 	 * Even though HSIC mode is a PHY-less mode, the reset  in ehci_hcd_omap_probe()
203 	for (i = 0; i < omap->nports; i++) {  in ehci_hcd_omap_probe()
204 		if (!omap->phy[i] ||  in ehci_hcd_omap_probe()
205 		     pdata->port_mode[i] == OMAP_EHCI_PORT_MODE_PHY)  in ehci_hcd_omap_probe()
208 		usb_phy_init(omap->phy[i]);  in ehci_hcd_omap_probe()
210 		usb_phy_set_suspend(omap->phy[i], 0);  in ehci_hcd_omap_probe()
220 	for (i = 0; i < omap->nports; i++) {  in ehci_hcd_omap_probe()
221 		if (omap->phy[i])  in ehci_hcd_omap_probe()
222 			usb_phy_shutdown(omap->phy[i]);  in ehci_hcd_omap_probe()
232  * ehci_hcd_omap_remove - shutdown processing for EHCI HCDs
233  * @pdev: USB Host Controller being removed
241 	struct device *dev = &pdev->dev;  in ehci_hcd_omap_remove()
243 	struct omap_hcd *omap = (struct omap_hcd *)hcd_to_ehci(hcd)->priv;  in ehci_hcd_omap_remove()
248 	for (i = 0; i < omap->nports; i++) {  in ehci_hcd_omap_remove()
249 		if (omap->phy[i])  in ehci_hcd_omap_remove()
250 			usb_phy_shutdown(omap->phy[i]);  in ehci_hcd_omap_remove()
259 	{ .compatible = "ti,ehci-omap" },
277 /*-------------------------------------------------------------------------*/
282 		return -ENODEV;  in ehci_omap_init()
295 MODULE_ALIAS("platform:ehci-omap");