1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2011 Marvell International Ltd. All rights reserved.
4 * Author: Chao Xie <chao.xie@marvell.com>
5 * Neil Zhang <zhangwm@marvell.com>
8 #include <linux/kernel.h>
9 #include <linux/module.h>
10 #include <linux/platform_device.h>
11 #include <linux/clk.h>
12 #include <linux/err.h>
13 #include <linux/usb/otg.h>
14 #include <linux/platform_data/mv_usb.h>
16 #define CAPLENGTH_MASK (0xff)
21 /* Which mode does this ehci running OTG/Host ? */
24 void __iomem *phy_regs;
25 void __iomem *cap_regs;
26 void __iomem *op_regs;
30 struct mv_usb_platform_data *pdata;
35 static void ehci_clock_enable(struct ehci_hcd_mv *ehci_mv)
37 clk_prepare_enable(ehci_mv->clk);
40 static void ehci_clock_disable(struct ehci_hcd_mv *ehci_mv)
42 clk_disable_unprepare(ehci_mv->clk);
45 static int mv_ehci_enable(struct ehci_hcd_mv *ehci_mv)
49 ehci_clock_enable(ehci_mv);
50 if (ehci_mv->pdata->phy_init) {
51 retval = ehci_mv->pdata->phy_init(ehci_mv->phy_regs);
59 static void mv_ehci_disable(struct ehci_hcd_mv *ehci_mv)
61 if (ehci_mv->pdata->phy_deinit)
62 ehci_mv->pdata->phy_deinit(ehci_mv->phy_regs);
63 ehci_clock_disable(ehci_mv);
66 static int mv_ehci_reset(struct usb_hcd *hcd)
68 struct device *dev = hcd->self.controller;
69 struct ehci_hcd_mv *ehci_mv = dev_get_drvdata(dev);
72 if (ehci_mv == NULL) {
73 dev_err(dev, "Can not find private ehci data\n");
79 retval = ehci_setup(hcd);
81 dev_err(dev, "ehci_setup failed %d\n", retval);
86 static const struct hc_driver mv_ehci_hc_driver = {
87 .description = hcd_name,
88 .product_desc = "Marvell EHCI",
89 .hcd_priv_size = sizeof(struct ehci_hcd),
92 * generic hardware linkage
95 .flags = HCD_MEMORY | HCD_USB2 | HCD_BH,
98 * basic lifecycle operations
100 .reset = mv_ehci_reset,
103 .shutdown = ehci_shutdown,
106 * managing i/o requests and associated device resources
108 .urb_enqueue = ehci_urb_enqueue,
109 .urb_dequeue = ehci_urb_dequeue,
110 .endpoint_disable = ehci_endpoint_disable,
111 .endpoint_reset = ehci_endpoint_reset,
112 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
117 .get_frame_number = ehci_get_frame,
122 .hub_status_data = ehci_hub_status_data,
123 .hub_control = ehci_hub_control,
124 .bus_suspend = ehci_bus_suspend,
125 .bus_resume = ehci_bus_resume,
128 static int mv_ehci_probe(struct platform_device *pdev)
130 struct mv_usb_platform_data *pdata = dev_get_platdata(&pdev->dev);
132 struct ehci_hcd *ehci;
133 struct ehci_hcd_mv *ehci_mv;
135 int retval = -ENODEV;
139 dev_err(&pdev->dev, "missing platform_data\n");
146 hcd = usb_create_hcd(&mv_ehci_hc_driver, &pdev->dev, "mv ehci");
150 ehci_mv = devm_kzalloc(&pdev->dev, sizeof(*ehci_mv), GFP_KERNEL);
151 if (ehci_mv == NULL) {
156 platform_set_drvdata(pdev, ehci_mv);
157 ehci_mv->pdata = pdata;
160 ehci_mv->clk = devm_clk_get(&pdev->dev, NULL);
161 if (IS_ERR(ehci_mv->clk)) {
162 dev_err(&pdev->dev, "error getting clock\n");
163 retval = PTR_ERR(ehci_mv->clk);
167 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phyregs");
168 ehci_mv->phy_regs = devm_ioremap_resource(&pdev->dev, r);
169 if (IS_ERR(ehci_mv->phy_regs)) {
170 retval = PTR_ERR(ehci_mv->phy_regs);
174 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "capregs");
175 ehci_mv->cap_regs = devm_ioremap_resource(&pdev->dev, r);
176 if (IS_ERR(ehci_mv->cap_regs)) {
177 retval = PTR_ERR(ehci_mv->cap_regs);
181 retval = mv_ehci_enable(ehci_mv);
183 dev_err(&pdev->dev, "init phy error %d\n", retval);
187 offset = readl(ehci_mv->cap_regs) & CAPLENGTH_MASK;
189 (void __iomem *) ((unsigned long) ehci_mv->cap_regs + offset);
191 hcd->rsrc_start = r->start;
192 hcd->rsrc_len = resource_size(r);
193 hcd->regs = ehci_mv->op_regs;
195 retval = platform_get_irq(pdev, 0);
197 goto err_disable_clk;
200 ehci = hcd_to_ehci(hcd);
201 ehci->caps = (struct ehci_caps *) ehci_mv->cap_regs;
203 ehci_mv->mode = pdata->mode;
204 if (ehci_mv->mode == MV_USB_MODE_OTG) {
205 ehci_mv->otg = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
206 if (IS_ERR(ehci_mv->otg)) {
207 retval = PTR_ERR(ehci_mv->otg);
209 if (retval == -ENXIO)
210 dev_info(&pdev->dev, "MV_USB_MODE_OTG "
211 "must have CONFIG_USB_PHY enabled\n");
214 "unable to find transceiver\n");
215 goto err_disable_clk;
218 retval = otg_set_host(ehci_mv->otg->otg, &hcd->self);
221 "unable to register with transceiver\n");
223 goto err_disable_clk;
225 /* otg will enable clock before use as host */
226 mv_ehci_disable(ehci_mv);
231 retval = usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
234 "failed to add hcd with err %d\n", retval);
237 device_wakeup_enable(hcd->self.controller);
240 if (pdata->private_init)
241 pdata->private_init(ehci_mv->op_regs, ehci_mv->phy_regs);
244 "successful find EHCI device with regs 0x%p irq %d"
245 " working in %s mode\n", hcd->regs, hcd->irq,
246 ehci_mv->mode == MV_USB_MODE_OTG ? "OTG" : "Host");
254 mv_ehci_disable(ehci_mv);
261 static int mv_ehci_remove(struct platform_device *pdev)
263 struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev);
264 struct usb_hcd *hcd = ehci_mv->hcd;
266 if (hcd->rh_registered)
269 if (!IS_ERR_OR_NULL(ehci_mv->otg))
270 otg_set_host(ehci_mv->otg->otg, NULL);
272 if (ehci_mv->mode == MV_USB_MODE_HOST) {
273 if (ehci_mv->pdata->set_vbus)
274 ehci_mv->pdata->set_vbus(0);
276 mv_ehci_disable(ehci_mv);
284 MODULE_ALIAS("mv-ehci");
286 static const struct platform_device_id ehci_id_table[] = {
287 {"pxa-u2oehci", PXA_U2OEHCI},
288 {"pxa-sph", PXA_SPH},
289 {"mmp3-hsic", MMP3_HSIC},
290 {"mmp3-fsic", MMP3_FSIC},
294 static void mv_ehci_shutdown(struct platform_device *pdev)
296 struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev);
297 struct usb_hcd *hcd = ehci_mv->hcd;
299 if (!hcd->rh_registered)
302 if (hcd->driver->shutdown)
303 hcd->driver->shutdown(hcd);
306 static struct platform_driver ehci_mv_driver = {
307 .probe = mv_ehci_probe,
308 .remove = mv_ehci_remove,
309 .shutdown = mv_ehci_shutdown,
312 .bus = &platform_bus_type,
314 .id_table = ehci_id_table,