xref: /openbmc/linux/drivers/usb/host/ehci-fsl.c (revision b34e08d5)
1 /*
2  * Copyright 2005-2009 MontaVista Software, Inc.
3  * Copyright 2008,2012      Freescale Semiconductor, Inc.
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License as published by the
7  * Free Software Foundation; either version 2 of the License, or (at your
8  * option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13  * for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software Foundation,
17  * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18  *
19  * Ported to 834x by Randy Vinson <rvinson@mvista.com> using code provided
20  * by Hunter Wu.
21  * Power Management support by Dave Liu <daveliu@freescale.com>,
22  * Jerry Huang <Chang-Ming.Huang@freescale.com> and
23  * Anton Vorontsov <avorontsov@ru.mvista.com>.
24  */
25 
26 #include <linux/kernel.h>
27 #include <linux/types.h>
28 #include <linux/delay.h>
29 #include <linux/pm.h>
30 #include <linux/err.h>
31 #include <linux/platform_device.h>
32 #include <linux/fsl_devices.h>
33 
34 #include "ehci-fsl.h"
35 
36 /* configure so an HC device and id are always provided */
37 /* always called with process context; sleeping is OK */
38 
39 /**
40  * usb_hcd_fsl_probe - initialize FSL-based HCDs
41  * @drvier: Driver to be used for this HCD
42  * @pdev: USB Host Controller being probed
43  * Context: !in_interrupt()
44  *
45  * Allocates basic resources for this USB host controller.
46  *
47  */
48 static int usb_hcd_fsl_probe(const struct hc_driver *driver,
49 			     struct platform_device *pdev)
50 {
51 	struct fsl_usb2_platform_data *pdata;
52 	struct usb_hcd *hcd;
53 	struct resource *res;
54 	int irq;
55 	int retval;
56 
57 	pr_debug("initializing FSL-SOC USB Controller\n");
58 
59 	/* Need platform data for setup */
60 	pdata = dev_get_platdata(&pdev->dev);
61 	if (!pdata) {
62 		dev_err(&pdev->dev,
63 			"No platform data for %s.\n", dev_name(&pdev->dev));
64 		return -ENODEV;
65 	}
66 
67 	/*
68 	 * This is a host mode driver, verify that we're supposed to be
69 	 * in host mode.
70 	 */
71 	if (!((pdata->operating_mode == FSL_USB2_DR_HOST) ||
72 	      (pdata->operating_mode == FSL_USB2_MPH_HOST) ||
73 	      (pdata->operating_mode == FSL_USB2_DR_OTG))) {
74 		dev_err(&pdev->dev,
75 			"Non Host Mode configured for %s. Wrong driver linked.\n",
76 			dev_name(&pdev->dev));
77 		return -ENODEV;
78 	}
79 
80 	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
81 	if (!res) {
82 		dev_err(&pdev->dev,
83 			"Found HC with no IRQ. Check %s setup!\n",
84 			dev_name(&pdev->dev));
85 		return -ENODEV;
86 	}
87 	irq = res->start;
88 
89 	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
90 	if (!hcd) {
91 		retval = -ENOMEM;
92 		goto err1;
93 	}
94 
95 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
96 	if (!res) {
97 		dev_err(&pdev->dev,
98 			"Found HC with no register addr. Check %s setup!\n",
99 			dev_name(&pdev->dev));
100 		retval = -ENODEV;
101 		goto err2;
102 	}
103 	hcd->rsrc_start = res->start;
104 	hcd->rsrc_len = resource_size(res);
105 	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
106 	if (IS_ERR(hcd->regs)) {
107 		retval = PTR_ERR(hcd->regs);
108 		goto err2;
109 	}
110 
111 	pdata->regs = hcd->regs;
112 
113 	if (pdata->power_budget)
114 		hcd->power_budget = pdata->power_budget;
115 
116 	/*
117 	 * do platform specific init: check the clock, grab/config pins, etc.
118 	 */
119 	if (pdata->init && pdata->init(pdev)) {
120 		retval = -ENODEV;
121 		goto err2;
122 	}
123 
124 	/* Enable USB controller, 83xx or 8536 */
125 	if (pdata->have_sysif_regs && pdata->controller_ver < FSL_USB_VER_1_6)
126 		setbits32(hcd->regs + FSL_SOC_USB_CTRL, 0x4);
127 
128 	/* Don't need to set host mode here. It will be done by tdi_reset() */
129 
130 	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
131 	if (retval != 0)
132 		goto err2;
133 	device_wakeup_enable(hcd->self.controller);
134 
135 #ifdef CONFIG_USB_OTG
136 	if (pdata->operating_mode == FSL_USB2_DR_OTG) {
137 		struct ehci_hcd *ehci = hcd_to_ehci(hcd);
138 
139 		hcd->phy = usb_get_phy(USB_PHY_TYPE_USB2);
140 		dev_dbg(&pdev->dev, "hcd=0x%p  ehci=0x%p, phy=0x%p\n",
141 			hcd, ehci, hcd->phy);
142 
143 		if (!IS_ERR_OR_NULL(hcd->phy)) {
144 			retval = otg_set_host(hcd->phy->otg,
145 					      &ehci_to_hcd(ehci)->self);
146 			if (retval) {
147 				usb_put_phy(hcd->phy);
148 				goto err2;
149 			}
150 		} else {
151 			dev_err(&pdev->dev, "can't find phy\n");
152 			retval = -ENODEV;
153 			goto err2;
154 		}
155 	}
156 #endif
157 	return retval;
158 
159       err2:
160 	usb_put_hcd(hcd);
161       err1:
162 	dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
163 	if (pdata->exit)
164 		pdata->exit(pdev);
165 	return retval;
166 }
167 
168 /* may be called without controller electrically present */
169 /* may be called with controller, bus, and devices active */
170 
171 /**
172  * usb_hcd_fsl_remove - shutdown processing for FSL-based HCDs
173  * @dev: USB Host Controller being removed
174  * Context: !in_interrupt()
175  *
176  * Reverses the effect of usb_hcd_fsl_probe().
177  *
178  */
179 static void usb_hcd_fsl_remove(struct usb_hcd *hcd,
180 			       struct platform_device *pdev)
181 {
182 	struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
183 
184 	if (!IS_ERR_OR_NULL(hcd->phy)) {
185 		otg_set_host(hcd->phy->otg, NULL);
186 		usb_put_phy(hcd->phy);
187 	}
188 
189 	usb_remove_hcd(hcd);
190 
191 	/*
192 	 * do platform specific un-initialization:
193 	 * release iomux pins, disable clock, etc.
194 	 */
195 	if (pdata->exit)
196 		pdata->exit(pdev);
197 	usb_put_hcd(hcd);
198 }
199 
200 static int ehci_fsl_setup_phy(struct usb_hcd *hcd,
201 			       enum fsl_usb2_phy_modes phy_mode,
202 			       unsigned int port_offset)
203 {
204 	u32 portsc;
205 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
206 	void __iomem *non_ehci = hcd->regs;
207 	struct device *dev = hcd->self.controller;
208 	struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev);
209 
210 	if (pdata->controller_ver < 0) {
211 		dev_warn(hcd->self.controller, "Could not get controller version\n");
212 		return -ENODEV;
213 	}
214 
215 	portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]);
216 	portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
217 
218 	switch (phy_mode) {
219 	case FSL_USB2_PHY_ULPI:
220 		if (pdata->have_sysif_regs && pdata->controller_ver) {
221 			/* controller version 1.6 or above */
222 			clrbits32(non_ehci + FSL_SOC_USB_CTRL, UTMI_PHY_EN);
223 			setbits32(non_ehci + FSL_SOC_USB_CTRL,
224 				ULPI_PHY_CLK_SEL | USB_CTRL_USB_EN);
225 		}
226 		portsc |= PORT_PTS_ULPI;
227 		break;
228 	case FSL_USB2_PHY_SERIAL:
229 		portsc |= PORT_PTS_SERIAL;
230 		break;
231 	case FSL_USB2_PHY_UTMI_WIDE:
232 		portsc |= PORT_PTS_PTW;
233 		/* fall through */
234 	case FSL_USB2_PHY_UTMI:
235 		if (pdata->have_sysif_regs && pdata->controller_ver) {
236 			/* controller version 1.6 or above */
237 			setbits32(non_ehci + FSL_SOC_USB_CTRL, UTMI_PHY_EN);
238 			mdelay(FSL_UTMI_PHY_DLY);  /* Delay for UTMI PHY CLK to
239 						become stable - 10ms*/
240 		}
241 		/* enable UTMI PHY */
242 		if (pdata->have_sysif_regs)
243 			setbits32(non_ehci + FSL_SOC_USB_CTRL,
244 				  CTRL_UTMI_PHY_EN);
245 		portsc |= PORT_PTS_UTMI;
246 		break;
247 	case FSL_USB2_PHY_NONE:
248 		break;
249 	}
250 
251 	if (pdata->have_sysif_regs && pdata->controller_ver &&
252 	    (phy_mode == FSL_USB2_PHY_ULPI)) {
253 		/* check PHY_CLK_VALID to get phy clk valid */
254 		if (!(spin_event_timeout(in_be32(non_ehci + FSL_SOC_USB_CTRL) &
255 				PHY_CLK_VALID, FSL_USB_PHY_CLK_TIMEOUT, 0) ||
256 				in_be32(non_ehci + FSL_SOC_USB_PRICTRL))) {
257 			dev_warn(hcd->self.controller, "USB PHY clock invalid\n");
258 			return -EINVAL;
259 		}
260 	}
261 
262 	ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
263 
264 	if (phy_mode != FSL_USB2_PHY_ULPI && pdata->have_sysif_regs)
265 		setbits32(non_ehci + FSL_SOC_USB_CTRL, USB_CTRL_USB_EN);
266 
267 	return 0;
268 }
269 
270 static int ehci_fsl_usb_setup(struct ehci_hcd *ehci)
271 {
272 	struct usb_hcd *hcd = ehci_to_hcd(ehci);
273 	struct fsl_usb2_platform_data *pdata;
274 	void __iomem *non_ehci = hcd->regs;
275 
276 	pdata = dev_get_platdata(hcd->self.controller);
277 
278 	if (pdata->have_sysif_regs) {
279 		/*
280 		* Turn on cache snooping hardware, since some PowerPC platforms
281 		* wholly rely on hardware to deal with cache coherent
282 		*/
283 
284 		/* Setup Snooping for all the 4GB space */
285 		/* SNOOP1 starts from 0x0, size 2G */
286 		out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB);
287 		/* SNOOP2 starts from 0x80000000, size 2G */
288 		out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB);
289 	}
290 
291 	if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
292 			(pdata->operating_mode == FSL_USB2_DR_OTG))
293 		if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
294 			return -EINVAL;
295 
296 	if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
297 		unsigned int chip, rev, svr;
298 
299 		svr = mfspr(SPRN_SVR);
300 		chip = svr >> 16;
301 		rev = (svr >> 4) & 0xf;
302 
303 		/* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
304 		if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
305 			ehci->has_fsl_port_bug = 1;
306 
307 		if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
308 			if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
309 				return -EINVAL;
310 
311 		if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
312 			if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 1))
313 				return -EINVAL;
314 	}
315 
316 	if (pdata->have_sysif_regs) {
317 #ifdef CONFIG_FSL_SOC_BOOKE
318 		out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008);
319 		out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080);
320 #else
321 		out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
322 		out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
323 #endif
324 		out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001);
325 	}
326 
327 	return 0;
328 }
329 
330 /* called after powerup, by probe or system-pm "wakeup" */
331 static int ehci_fsl_reinit(struct ehci_hcd *ehci)
332 {
333 	if (ehci_fsl_usb_setup(ehci))
334 		return -EINVAL;
335 
336 	return 0;
337 }
338 
339 /* called during probe() after chip reset completes */
340 static int ehci_fsl_setup(struct usb_hcd *hcd)
341 {
342 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
343 	int retval;
344 	struct fsl_usb2_platform_data *pdata;
345 	struct device *dev;
346 
347 	dev = hcd->self.controller;
348 	pdata = dev_get_platdata(hcd->self.controller);
349 	ehci->big_endian_desc = pdata->big_endian_desc;
350 	ehci->big_endian_mmio = pdata->big_endian_mmio;
351 
352 	/* EHCI registers start at offset 0x100 */
353 	ehci->caps = hcd->regs + 0x100;
354 
355 #ifdef CONFIG_PPC_83xx
356 	/*
357 	 * Deal with MPC834X that need port power to be cycled after the power
358 	 * fault condition is removed. Otherwise the state machine does not
359 	 * reflect PORTSC[CSC] correctly.
360 	 */
361 	ehci->need_oc_pp_cycle = 1;
362 #endif
363 
364 	hcd->has_tt = 1;
365 
366 	retval = ehci_setup(hcd);
367 	if (retval)
368 		return retval;
369 
370 	if (of_device_is_compatible(dev->parent->of_node,
371 				    "fsl,mpc5121-usb2-dr")) {
372 		/*
373 		 * set SBUSCFG:AHBBRST so that control msgs don't
374 		 * fail when doing heavy PATA writes.
375 		 */
376 		ehci_writel(ehci, SBUSCFG_INCR8,
377 			    hcd->regs + FSL_SOC_USB_SBUSCFG);
378 	}
379 
380 	retval = ehci_fsl_reinit(ehci);
381 	return retval;
382 }
383 
384 struct ehci_fsl {
385 	struct ehci_hcd	ehci;
386 
387 #ifdef CONFIG_PM
388 	/* Saved USB PHY settings, need to restore after deep sleep. */
389 	u32 usb_ctrl;
390 #endif
391 };
392 
393 #ifdef CONFIG_PM
394 
395 #ifdef CONFIG_PPC_MPC512x
396 static int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
397 {
398 	struct usb_hcd *hcd = dev_get_drvdata(dev);
399 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
400 	struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev);
401 	u32 tmp;
402 
403 #ifdef CONFIG_DYNAMIC_DEBUG
404 	u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE);
405 	mode &= USBMODE_CM_MASK;
406 	tmp = ehci_readl(ehci, hcd->regs + 0x140);	/* usbcmd */
407 
408 	dev_dbg(dev, "suspend=%d already_suspended=%d "
409 		"mode=%d  usbcmd %08x\n", pdata->suspended,
410 		pdata->already_suspended, mode, tmp);
411 #endif
412 
413 	/*
414 	 * If the controller is already suspended, then this must be a
415 	 * PM suspend.  Remember this fact, so that we will leave the
416 	 * controller suspended at PM resume time.
417 	 */
418 	if (pdata->suspended) {
419 		dev_dbg(dev, "already suspended, leaving early\n");
420 		pdata->already_suspended = 1;
421 		return 0;
422 	}
423 
424 	dev_dbg(dev, "suspending...\n");
425 
426 	ehci->rh_state = EHCI_RH_SUSPENDED;
427 	dev->power.power_state = PMSG_SUSPEND;
428 
429 	/* ignore non-host interrupts */
430 	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
431 
432 	/* stop the controller */
433 	tmp = ehci_readl(ehci, &ehci->regs->command);
434 	tmp &= ~CMD_RUN;
435 	ehci_writel(ehci, tmp, &ehci->regs->command);
436 
437 	/* save EHCI registers */
438 	pdata->pm_command = ehci_readl(ehci, &ehci->regs->command);
439 	pdata->pm_command &= ~CMD_RUN;
440 	pdata->pm_status  = ehci_readl(ehci, &ehci->regs->status);
441 	pdata->pm_intr_enable  = ehci_readl(ehci, &ehci->regs->intr_enable);
442 	pdata->pm_frame_index  = ehci_readl(ehci, &ehci->regs->frame_index);
443 	pdata->pm_segment  = ehci_readl(ehci, &ehci->regs->segment);
444 	pdata->pm_frame_list  = ehci_readl(ehci, &ehci->regs->frame_list);
445 	pdata->pm_async_next  = ehci_readl(ehci, &ehci->regs->async_next);
446 	pdata->pm_configured_flag  =
447 		ehci_readl(ehci, &ehci->regs->configured_flag);
448 	pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]);
449 	pdata->pm_usbgenctrl = ehci_readl(ehci,
450 					  hcd->regs + FSL_SOC_USB_USBGENCTRL);
451 
452 	/* clear the W1C bits */
453 	pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS);
454 
455 	pdata->suspended = 1;
456 
457 	/* clear PP to cut power to the port */
458 	tmp = ehci_readl(ehci, &ehci->regs->port_status[0]);
459 	tmp &= ~PORT_POWER;
460 	ehci_writel(ehci, tmp, &ehci->regs->port_status[0]);
461 
462 	return 0;
463 }
464 
465 static int ehci_fsl_mpc512x_drv_resume(struct device *dev)
466 {
467 	struct usb_hcd *hcd = dev_get_drvdata(dev);
468 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
469 	struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev);
470 	u32 tmp;
471 
472 	dev_dbg(dev, "suspend=%d already_suspended=%d\n",
473 		pdata->suspended, pdata->already_suspended);
474 
475 	/*
476 	 * If the controller was already suspended at suspend time,
477 	 * then don't resume it now.
478 	 */
479 	if (pdata->already_suspended) {
480 		dev_dbg(dev, "already suspended, leaving early\n");
481 		pdata->already_suspended = 0;
482 		return 0;
483 	}
484 
485 	if (!pdata->suspended) {
486 		dev_dbg(dev, "not suspended, leaving early\n");
487 		return 0;
488 	}
489 
490 	pdata->suspended = 0;
491 
492 	dev_dbg(dev, "resuming...\n");
493 
494 	/* set host mode */
495 	tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0);
496 	ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);
497 
498 	ehci_writel(ehci, pdata->pm_usbgenctrl,
499 		    hcd->regs + FSL_SOC_USB_USBGENCTRL);
500 	ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE,
501 		    hcd->regs + FSL_SOC_USB_ISIPHYCTRL);
502 
503 	ehci_writel(ehci, SBUSCFG_INCR8, hcd->regs + FSL_SOC_USB_SBUSCFG);
504 
505 	/* restore EHCI registers */
506 	ehci_writel(ehci, pdata->pm_command, &ehci->regs->command);
507 	ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable);
508 	ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index);
509 	ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment);
510 	ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list);
511 	ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next);
512 	ehci_writel(ehci, pdata->pm_configured_flag,
513 		    &ehci->regs->configured_flag);
514 	ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]);
515 
516 	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
517 	ehci->rh_state = EHCI_RH_RUNNING;
518 	dev->power.power_state = PMSG_ON;
519 
520 	tmp = ehci_readl(ehci, &ehci->regs->command);
521 	tmp |= CMD_RUN;
522 	ehci_writel(ehci, tmp, &ehci->regs->command);
523 
524 	usb_hcd_resume_root_hub(hcd);
525 
526 	return 0;
527 }
528 #else
529 static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
530 {
531 	return 0;
532 }
533 
534 static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev)
535 {
536 	return 0;
537 }
538 #endif /* CONFIG_PPC_MPC512x */
539 
540 static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
541 {
542 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
543 
544 	return container_of(ehci, struct ehci_fsl, ehci);
545 }
546 
547 static int ehci_fsl_drv_suspend(struct device *dev)
548 {
549 	struct usb_hcd *hcd = dev_get_drvdata(dev);
550 	struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
551 	void __iomem *non_ehci = hcd->regs;
552 
553 	if (of_device_is_compatible(dev->parent->of_node,
554 				    "fsl,mpc5121-usb2-dr")) {
555 		return ehci_fsl_mpc512x_drv_suspend(dev);
556 	}
557 
558 	ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
559 			device_may_wakeup(dev));
560 	if (!fsl_deep_sleep())
561 		return 0;
562 
563 	ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL);
564 	return 0;
565 }
566 
567 static int ehci_fsl_drv_resume(struct device *dev)
568 {
569 	struct usb_hcd *hcd = dev_get_drvdata(dev);
570 	struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
571 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
572 	void __iomem *non_ehci = hcd->regs;
573 
574 	if (of_device_is_compatible(dev->parent->of_node,
575 				    "fsl,mpc5121-usb2-dr")) {
576 		return ehci_fsl_mpc512x_drv_resume(dev);
577 	}
578 
579 	ehci_prepare_ports_for_controller_resume(ehci);
580 	if (!fsl_deep_sleep())
581 		return 0;
582 
583 	usb_root_hub_lost_power(hcd->self.root_hub);
584 
585 	/* Restore USB PHY settings and enable the controller. */
586 	out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl);
587 
588 	ehci_reset(ehci);
589 	ehci_fsl_reinit(ehci);
590 
591 	return 0;
592 }
593 
594 static int ehci_fsl_drv_restore(struct device *dev)
595 {
596 	struct usb_hcd *hcd = dev_get_drvdata(dev);
597 
598 	usb_root_hub_lost_power(hcd->self.root_hub);
599 	return 0;
600 }
601 
602 static struct dev_pm_ops ehci_fsl_pm_ops = {
603 	.suspend = ehci_fsl_drv_suspend,
604 	.resume = ehci_fsl_drv_resume,
605 	.restore = ehci_fsl_drv_restore,
606 };
607 
608 #define EHCI_FSL_PM_OPS		(&ehci_fsl_pm_ops)
609 #else
610 #define EHCI_FSL_PM_OPS		NULL
611 #endif /* CONFIG_PM */
612 
613 #ifdef CONFIG_USB_OTG
614 static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port)
615 {
616 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
617 	u32 status;
618 
619 	if (!port)
620 		return -EINVAL;
621 
622 	port--;
623 
624 	/* start port reset before HNP protocol time out */
625 	status = readl(&ehci->regs->port_status[port]);
626 	if (!(status & PORT_CONNECT))
627 		return -ENODEV;
628 
629 	/* khubd will finish the reset later */
630 	if (ehci_is_TDI(ehci)) {
631 		writel(PORT_RESET |
632 		       (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)),
633 		       &ehci->regs->port_status[port]);
634 	} else {
635 		writel(PORT_RESET, &ehci->regs->port_status[port]);
636 	}
637 
638 	return 0;
639 }
640 #else
641 #define ehci_start_port_reset	NULL
642 #endif /* CONFIG_USB_OTG */
643 
644 
645 static const struct hc_driver ehci_fsl_hc_driver = {
646 	.description = hcd_name,
647 	.product_desc = "Freescale On-Chip EHCI Host Controller",
648 	.hcd_priv_size = sizeof(struct ehci_fsl),
649 
650 	/*
651 	 * generic hardware linkage
652 	 */
653 	.irq = ehci_irq,
654 	.flags = HCD_USB2 | HCD_MEMORY | HCD_BH,
655 
656 	/*
657 	 * basic lifecycle operations
658 	 */
659 	.reset = ehci_fsl_setup,
660 	.start = ehci_run,
661 	.stop = ehci_stop,
662 	.shutdown = ehci_shutdown,
663 
664 	/*
665 	 * managing i/o requests and associated device resources
666 	 */
667 	.urb_enqueue = ehci_urb_enqueue,
668 	.urb_dequeue = ehci_urb_dequeue,
669 	.endpoint_disable = ehci_endpoint_disable,
670 	.endpoint_reset = ehci_endpoint_reset,
671 
672 	/*
673 	 * scheduling support
674 	 */
675 	.get_frame_number = ehci_get_frame,
676 
677 	/*
678 	 * root hub support
679 	 */
680 	.hub_status_data = ehci_hub_status_data,
681 	.hub_control = ehci_hub_control,
682 	.bus_suspend = ehci_bus_suspend,
683 	.bus_resume = ehci_bus_resume,
684 	.start_port_reset = ehci_start_port_reset,
685 	.relinquish_port = ehci_relinquish_port,
686 	.port_handed_over = ehci_port_handed_over,
687 
688 	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
689 };
690 
691 static int ehci_fsl_drv_probe(struct platform_device *pdev)
692 {
693 	if (usb_disabled())
694 		return -ENODEV;
695 
696 	/* FIXME we only want one one probe() not two */
697 	return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
698 }
699 
700 static int ehci_fsl_drv_remove(struct platform_device *pdev)
701 {
702 	struct usb_hcd *hcd = platform_get_drvdata(pdev);
703 
704 	/* FIXME we only want one one remove() not two */
705 	usb_hcd_fsl_remove(hcd, pdev);
706 	return 0;
707 }
708 
709 MODULE_ALIAS("platform:fsl-ehci");
710 
711 static struct platform_driver ehci_fsl_driver = {
712 	.probe = ehci_fsl_drv_probe,
713 	.remove = ehci_fsl_drv_remove,
714 	.shutdown = usb_hcd_platform_shutdown,
715 	.driver = {
716 		.name = "fsl-ehci",
717 		.owner	= THIS_MODULE,
718 		.pm = EHCI_FSL_PM_OPS,
719 	},
720 };
721