1 // SPDX-License-Identifier: GPL-2.0+
13 #include <linux/usb/otg.h>
14 #include <linux/usb/ulpi.h>
16 #include <linux/usb.h>
17 #include <linux/usb/hcd.h>
18 #include <linux/platform_data/usb-ehci-mxc.h>
19 #include "ehci.h"
21 #define DRIVER_DESC "Freescale On-Chip EHCI Host driver"
23 static const char hcd_name[] = "ehci-mxc";
39 	struct device *dev = &pdev->dev;  in ehci_mxc_drv_probe()
45 	struct ehci_hcd *ehci;  in ehci_mxc_drv_probe()  local
49 		return -EINVAL;  in ehci_mxc_drv_probe()
58 		return -ENOMEM;  in ehci_mxc_drv_probe()
61 	hcd->regs = devm_ioremap_resource(dev, res);  in ehci_mxc_drv_probe()
62 	if (IS_ERR(hcd->regs)) {  in ehci_mxc_drv_probe()
63 		ret = PTR_ERR(hcd->regs);  in ehci_mxc_drv_probe()
66 	hcd->rsrc_start = res->start;  in ehci_mxc_drv_probe()
67 	hcd->rsrc_len = resource_size(res);  in ehci_mxc_drv_probe()
69 	hcd->has_tt = 1;  in ehci_mxc_drv_probe()
70 	ehci = hcd_to_ehci(hcd);  in ehci_mxc_drv_probe()
71 	priv = (struct ehci_mxc_priv *) ehci->priv;  in ehci_mxc_drv_probe()
74 	priv->usbclk = devm_clk_get(dev, "ipg");  in ehci_mxc_drv_probe()
75 	if (IS_ERR(priv->usbclk)) {  in ehci_mxc_drv_probe()
76 		ret = PTR_ERR(priv->usbclk);  in ehci_mxc_drv_probe()
79 	clk_prepare_enable(priv->usbclk);  in ehci_mxc_drv_probe()
81 	priv->ahbclk = devm_clk_get(dev, "ahb");  in ehci_mxc_drv_probe()
82 	if (IS_ERR(priv->ahbclk)) {  in ehci_mxc_drv_probe()
83 		ret = PTR_ERR(priv->ahbclk);  in ehci_mxc_drv_probe()
86 	clk_prepare_enable(priv->ahbclk);  in ehci_mxc_drv_probe()
89 	priv->phyclk = devm_clk_get(dev, "phy");  in ehci_mxc_drv_probe()
90 	if (IS_ERR(priv->phyclk))  in ehci_mxc_drv_probe()
91 		priv->phyclk = NULL;  in ehci_mxc_drv_probe()
92 	if (priv->phyclk)  in ehci_mxc_drv_probe()
93 		clk_prepare_enable(priv->phyclk);  in ehci_mxc_drv_probe()
96 	if (pdata->init) {  in ehci_mxc_drv_probe()
97 		ret = pdata->init(pdev);  in ehci_mxc_drv_probe()
106 	/* EHCI registers start at offset 0x100 */  in ehci_mxc_drv_probe()
107 	ehci->caps = hcd->regs + 0x100;  in ehci_mxc_drv_probe()
108 	ehci->regs = hcd->regs + 0x100 +  in ehci_mxc_drv_probe()
109 		HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));  in ehci_mxc_drv_probe()
112 	ehci_writel(ehci, pdata->portsc, &ehci->regs->port_status[0]);  in ehci_mxc_drv_probe()
118 	if (pdata->otg) {  in ehci_mxc_drv_probe()
119 		pdata->otg->io_priv = hcd->regs + ULPI_VIEWPORT_OFFSET;  in ehci_mxc_drv_probe()
120 		ret = usb_phy_init(pdata->otg);  in ehci_mxc_drv_probe()
123 			ret = -ENODEV;  in ehci_mxc_drv_probe()
126 		ret = otg_set_vbus(pdata->otg->otg, 1);  in ehci_mxc_drv_probe()
139 	device_wakeup_enable(hcd->self.controller);  in ehci_mxc_drv_probe()
143 	if (pdata && pdata->exit)  in ehci_mxc_drv_probe()
144 		pdata->exit(pdev);  in ehci_mxc_drv_probe()
146 	if (priv->phyclk)  in ehci_mxc_drv_probe()
147 		clk_disable_unprepare(priv->phyclk);  in ehci_mxc_drv_probe()
149 	clk_disable_unprepare(priv->ahbclk);  in ehci_mxc_drv_probe()
151 	clk_disable_unprepare(priv->usbclk);  in ehci_mxc_drv_probe()
159 	struct mxc_usbh_platform_data *pdata = dev_get_platdata(&pdev->dev);  in ehci_mxc_drv_remove()
161 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);  in ehci_mxc_drv_remove()  local
162 	struct ehci_mxc_priv *priv = (struct ehci_mxc_priv *) ehci->priv;  in ehci_mxc_drv_remove()
166 	if (pdata && pdata->exit)  in ehci_mxc_drv_remove()
167 		pdata->exit(pdev);  in ehci_mxc_drv_remove()
169 	if (pdata && pdata->otg)  in ehci_mxc_drv_remove()
170 		usb_phy_shutdown(pdata->otg);  in ehci_mxc_drv_remove()
172 	clk_disable_unprepare(priv->usbclk);  in ehci_mxc_drv_remove()
173 	clk_disable_unprepare(priv->ahbclk);  in ehci_mxc_drv_remove()
175 	if (priv->phyclk)  in ehci_mxc_drv_remove()
176 		clk_disable_unprepare(priv->phyclk);  in ehci_mxc_drv_remove()
182 MODULE_ALIAS("platform:mxc-ehci");
189 		   .name = "mxc-ehci",
196 		return -ENODEV;  in ehci_mxc_init()