2 * Copyright (C) 2011 Marvell International Ltd. All rights reserved.
3 * Author: Chao Xie <chao.xie@marvell.com>
4 * Neil Zhang <zhangwm@marvell.com>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/platform_device.h>
15 #include <linux/clk.h>
16 #include <linux/err.h>
17 #include <linux/usb/otg.h>
18 #include <linux/platform_data/mv_usb.h>
20 #define CAPLENGTH_MASK (0xff)
25 /* Which mode does this ehci running OTG/Host ? */
28 void __iomem *phy_regs;
29 void __iomem *cap_regs;
30 void __iomem *op_regs;
34 struct mv_usb_platform_data *pdata;
36 /* clock source and total clock number */
41 static void ehci_clock_enable(struct ehci_hcd_mv *ehci_mv)
45 for (i = 0; i < ehci_mv->clknum; i++)
46 clk_prepare_enable(ehci_mv->clk[i]);
49 static void ehci_clock_disable(struct ehci_hcd_mv *ehci_mv)
53 for (i = 0; i < ehci_mv->clknum; i++)
54 clk_disable_unprepare(ehci_mv->clk[i]);
57 static int mv_ehci_enable(struct ehci_hcd_mv *ehci_mv)
61 ehci_clock_enable(ehci_mv);
62 if (ehci_mv->pdata->phy_init) {
63 retval = ehci_mv->pdata->phy_init(ehci_mv->phy_regs);
71 static void mv_ehci_disable(struct ehci_hcd_mv *ehci_mv)
73 if (ehci_mv->pdata->phy_deinit)
74 ehci_mv->pdata->phy_deinit(ehci_mv->phy_regs);
75 ehci_clock_disable(ehci_mv);
78 static int mv_ehci_reset(struct usb_hcd *hcd)
80 struct device *dev = hcd->self.controller;
81 struct ehci_hcd_mv *ehci_mv = dev_get_drvdata(dev);
84 if (ehci_mv == NULL) {
85 dev_err(dev, "Can not find private ehci data\n");
91 retval = ehci_setup(hcd);
93 dev_err(dev, "ehci_setup failed %d\n", retval);
98 static const struct hc_driver mv_ehci_hc_driver = {
99 .description = hcd_name,
100 .product_desc = "Marvell EHCI",
101 .hcd_priv_size = sizeof(struct ehci_hcd),
104 * generic hardware linkage
107 .flags = HCD_MEMORY | HCD_USB2,
110 * basic lifecycle operations
112 .reset = mv_ehci_reset,
115 .shutdown = ehci_shutdown,
118 * managing i/o requests and associated device resources
120 .urb_enqueue = ehci_urb_enqueue,
121 .urb_dequeue = ehci_urb_dequeue,
122 .endpoint_disable = ehci_endpoint_disable,
123 .endpoint_reset = ehci_endpoint_reset,
124 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
129 .get_frame_number = ehci_get_frame,
134 .hub_status_data = ehci_hub_status_data,
135 .hub_control = ehci_hub_control,
136 .bus_suspend = ehci_bus_suspend,
137 .bus_resume = ehci_bus_resume,
140 static int mv_ehci_probe(struct platform_device *pdev)
142 struct mv_usb_platform_data *pdata = pdev->dev.platform_data;
144 struct ehci_hcd *ehci;
145 struct ehci_hcd_mv *ehci_mv;
147 int clk_i, retval = -ENODEV;
152 dev_err(&pdev->dev, "missing platform_data\n");
159 hcd = usb_create_hcd(&mv_ehci_hc_driver, &pdev->dev, "mv ehci");
163 size = sizeof(*ehci_mv) + sizeof(struct clk *) * pdata->clknum;
164 ehci_mv = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
165 if (ehci_mv == NULL) {
166 dev_err(&pdev->dev, "cannot allocate ehci_hcd_mv\n");
171 platform_set_drvdata(pdev, ehci_mv);
172 ehci_mv->pdata = pdata;
175 ehci_mv->clknum = pdata->clknum;
176 for (clk_i = 0; clk_i < ehci_mv->clknum; clk_i++) {
177 ehci_mv->clk[clk_i] =
178 devm_clk_get(&pdev->dev, pdata->clkname[clk_i]);
179 if (IS_ERR(ehci_mv->clk[clk_i])) {
180 dev_err(&pdev->dev, "error get clck \"%s\"\n",
181 pdata->clkname[clk_i]);
182 retval = PTR_ERR(ehci_mv->clk[clk_i]);
183 goto err_clear_drvdata;
187 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phyregs");
189 dev_err(&pdev->dev, "no phy I/O memory resource defined\n");
191 goto err_clear_drvdata;
194 ehci_mv->phy_regs = devm_ioremap(&pdev->dev, r->start,
196 if (ehci_mv->phy_regs == 0) {
197 dev_err(&pdev->dev, "failed to map phy I/O memory\n");
199 goto err_clear_drvdata;
202 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "capregs");
204 dev_err(&pdev->dev, "no I/O memory resource defined\n");
206 goto err_clear_drvdata;
209 ehci_mv->cap_regs = devm_ioremap(&pdev->dev, r->start,
211 if (ehci_mv->cap_regs == NULL) {
212 dev_err(&pdev->dev, "failed to map I/O memory\n");
214 goto err_clear_drvdata;
217 retval = mv_ehci_enable(ehci_mv);
219 dev_err(&pdev->dev, "init phy error %d\n", retval);
220 goto err_clear_drvdata;
223 offset = readl(ehci_mv->cap_regs) & CAPLENGTH_MASK;
225 (void __iomem *) ((unsigned long) ehci_mv->cap_regs + offset);
227 hcd->rsrc_start = r->start;
228 hcd->rsrc_len = r->end - r->start + 1;
229 hcd->regs = ehci_mv->op_regs;
231 hcd->irq = platform_get_irq(pdev, 0);
233 dev_err(&pdev->dev, "Cannot get irq.");
235 goto err_disable_clk;
238 ehci = hcd_to_ehci(hcd);
239 ehci->caps = (struct ehci_caps *) ehci_mv->cap_regs;
241 ehci_mv->mode = pdata->mode;
242 if (ehci_mv->mode == MV_USB_MODE_OTG) {
243 #ifdef CONFIG_USB_OTG_UTILS
244 ehci_mv->otg = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
245 if (IS_ERR_OR_NULL(ehci_mv->otg)) {
247 "unable to find transceiver\n");
249 goto err_disable_clk;
252 retval = otg_set_host(ehci_mv->otg->otg, &hcd->self);
255 "unable to register with transceiver\n");
257 goto err_disable_clk;
259 /* otg will enable clock before use as host */
260 mv_ehci_disable(ehci_mv);
262 dev_info(&pdev->dev, "MV_USB_MODE_OTG "
263 "must have CONFIG_USB_OTG_UTILS enabled\n");
264 goto err_disable_clk;
270 retval = usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
273 "failed to add hcd with err %d\n", retval);
278 if (pdata->private_init)
279 pdata->private_init(ehci_mv->op_regs, ehci_mv->phy_regs);
282 "successful find EHCI device with regs 0x%p irq %d"
283 " working in %s mode\n", hcd->regs, hcd->irq,
284 ehci_mv->mode == MV_USB_MODE_OTG ? "OTG" : "Host");
292 mv_ehci_disable(ehci_mv);
294 platform_set_drvdata(pdev, NULL);
301 static int mv_ehci_remove(struct platform_device *pdev)
303 struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev);
304 struct usb_hcd *hcd = ehci_mv->hcd;
307 if (hcd->rh_registered)
310 if (!IS_ERR_OR_NULL(ehci_mv->otg))
311 otg_set_host(ehci_mv->otg->otg, NULL);
313 if (ehci_mv->mode == MV_USB_MODE_HOST) {
314 if (ehci_mv->pdata->set_vbus)
315 ehci_mv->pdata->set_vbus(0);
317 mv_ehci_disable(ehci_mv);
320 platform_set_drvdata(pdev, NULL);
327 MODULE_ALIAS("mv-ehci");
329 static const struct platform_device_id ehci_id_table[] = {
330 {"pxa-u2oehci", PXA_U2OEHCI},
331 {"pxa-sph", PXA_SPH},
332 {"mmp3-hsic", MMP3_HSIC},
333 {"mmp3-fsic", MMP3_FSIC},
337 static void mv_ehci_shutdown(struct platform_device *pdev)
339 struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev);
340 struct usb_hcd *hcd = ehci_mv->hcd;
342 if (!hcd->rh_registered)
345 if (hcd->driver->shutdown)
346 hcd->driver->shutdown(hcd);
349 static struct platform_driver ehci_mv_driver = {
350 .probe = mv_ehci_probe,
351 .remove = mv_ehci_remove,
352 .shutdown = mv_ehci_shutdown,
355 .bus = &platform_bus_type,
357 .id_table = ehci_id_table,