1// SPDX-License-Identifier: GPL-1.0+
2/*
3 * OHCI HCD (Host Controller Driver) for USB.
4 *
5 *  Copyright (C) 2004 SAN People (Pty) Ltd.
6 *  Copyright (C) 2005 Thibaut VARENE <varenet@parisc-linux.org>
7 *
8 * AT91 Bus Glue
9 *
10 * Based on fragments of 2.4 driver by Rick Bronson.
11 * Based on ohci-omap.c
12 *
13 * This file is licenced under the GPL.
14 */
15
16#include <linux/clk.h>
17#include <linux/dma-mapping.h>
18#include <linux/gpio/consumer.h>
19#include <linux/of_platform.h>
20#include <linux/platform_device.h>
21#include <linux/platform_data/atmel.h>
22#include <linux/io.h>
23#include <linux/kernel.h>
24#include <linux/module.h>
25#include <linux/mfd/syscon.h>
26#include <linux/regmap.h>
27#include <linux/usb.h>
28#include <linux/usb/hcd.h>
29#include <soc/at91/atmel-sfr.h>
30
31#include "ohci.h"
32
33#define valid_port(index)	((index) >= 0 && (index) < AT91_MAX_USBH_PORTS)
34#define at91_for_each_port(index)	\
35		for ((index) = 0; (index) < AT91_MAX_USBH_PORTS; (index)++)
36
37/* interface, function and usb clocks; sometimes also an AHB clock */
38#define hcd_to_ohci_at91_priv(h) \
39	((struct ohci_at91_priv *)hcd_to_ohci(h)->priv)
40
41#define AT91_MAX_USBH_PORTS	3
42struct at91_usbh_data {
43	struct gpio_desc *vbus_pin[AT91_MAX_USBH_PORTS];
44	struct gpio_desc *overcurrent_pin[AT91_MAX_USBH_PORTS];
45	u8 ports;				/* number of ports on root hub */
46	u8 overcurrent_supported;
47	u8 overcurrent_status[AT91_MAX_USBH_PORTS];
48	u8 overcurrent_changed[AT91_MAX_USBH_PORTS];
49};
50
51struct ohci_at91_priv {
52	struct clk *iclk;
53	struct clk *fclk;
54	struct clk *hclk;
55	bool clocked;
56	bool wakeup;		/* Saved wake-up state for resume */
57	struct regmap *sfr_regmap;
58};
59/* interface and function clocks; sometimes also an AHB clock */
60
61#define DRIVER_DESC "OHCI Atmel driver"
62
63static const char hcd_name[] = "ohci-atmel";
64
65static struct hc_driver __read_mostly ohci_at91_hc_driver;
66
67static const struct ohci_driver_overrides ohci_at91_drv_overrides __initconst = {
68	.extra_priv_size = sizeof(struct ohci_at91_priv),
69};
70
71/*-------------------------------------------------------------------------*/
72
73static void at91_start_clock(struct ohci_at91_priv *ohci_at91)
74{
75	if (ohci_at91->clocked)
76		return;
77
78	clk_set_rate(ohci_at91->fclk, 48000000);
79	clk_prepare_enable(ohci_at91->hclk);
80	clk_prepare_enable(ohci_at91->iclk);
81	clk_prepare_enable(ohci_at91->fclk);
82	ohci_at91->clocked = true;
83}
84
85static void at91_stop_clock(struct ohci_at91_priv *ohci_at91)
86{
87	if (!ohci_at91->clocked)
88		return;
89
90	clk_disable_unprepare(ohci_at91->fclk);
91	clk_disable_unprepare(ohci_at91->iclk);
92	clk_disable_unprepare(ohci_at91->hclk);
93	ohci_at91->clocked = false;
94}
95
96static void at91_start_hc(struct platform_device *pdev)
97{
98	struct usb_hcd *hcd = platform_get_drvdata(pdev);
99	struct ohci_regs __iomem *regs = hcd->regs;
100	struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd);
101
102	dev_dbg(&pdev->dev, "start\n");
103
104	/*
105	 * Start the USB clocks.
106	 */
107	at91_start_clock(ohci_at91);
108
109	/*
110	 * The USB host controller must remain in reset.
111	 */
112	writel(0, &regs->control);
113}
114
115static void at91_stop_hc(struct platform_device *pdev)
116{
117	struct usb_hcd *hcd = platform_get_drvdata(pdev);
118	struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd);
119
120	dev_dbg(&pdev->dev, "stop\n");
121
122	/*
123	 * Put the USB host controller into reset.
124	 */
125	usb_hcd_platform_shutdown(pdev);
126
127	/*
128	 * Stop the USB clocks.
129	 */
130	at91_stop_clock(ohci_at91);
131}
132
133
134/*-------------------------------------------------------------------------*/
135
136static void usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *);
137
138static struct regmap *at91_dt_syscon_sfr(void)
139{
140	struct regmap *regmap;
141
142	regmap = syscon_regmap_lookup_by_compatible("atmel,sama5d2-sfr");
143	if (IS_ERR(regmap)) {
144		regmap = syscon_regmap_lookup_by_compatible("microchip,sam9x60-sfr");
145		if (IS_ERR(regmap))
146			regmap = NULL;
147	}
148
149	return regmap;
150}
151
152/* configure so an HC device and id are always provided */
153/* always called with process context; sleeping is OK */
154
155
156/*
157 * usb_hcd_at91_probe - initialize AT91-based HCDs
158 * Context: !in_interrupt()
159 *
160 * Allocates basic resources for this USB host controller, and
161 * then invokes the start() method for the HCD associated with it
162 * through the hotplug entry's driver_data.
163 */
164static int usb_hcd_at91_probe(const struct hc_driver *driver,
165			struct platform_device *pdev)
166{
167	struct at91_usbh_data *board;
168	struct ohci_hcd *ohci;
169	int retval;
170	struct usb_hcd *hcd;
171	struct ohci_at91_priv *ohci_at91;
172	struct device *dev = &pdev->dev;
173	struct resource *res;
174	int irq;
175
176	irq = platform_get_irq(pdev, 0);
177	if (irq < 0) {
178		dev_dbg(dev, "hcd probe: missing irq resource\n");
179		return irq;
180	}
181
182	hcd = usb_create_hcd(driver, dev, "at91");
183	if (!hcd)
184		return -ENOMEM;
185	ohci_at91 = hcd_to_ohci_at91_priv(hcd);
186
187	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
188	hcd->regs = devm_ioremap_resource(dev, res);
189	if (IS_ERR(hcd->regs)) {
190		retval = PTR_ERR(hcd->regs);
191		goto err;
192	}
193	hcd->rsrc_start = res->start;
194	hcd->rsrc_len = resource_size(res);
195
196	ohci_at91->iclk = devm_clk_get(dev, "ohci_clk");
197	if (IS_ERR(ohci_at91->iclk)) {
198		dev_err(dev, "failed to get ohci_clk\n");
199		retval = PTR_ERR(ohci_at91->iclk);
200		goto err;
201	}
202	ohci_at91->fclk = devm_clk_get(dev, "uhpck");
203	if (IS_ERR(ohci_at91->fclk)) {
204		dev_err(dev, "failed to get uhpck\n");
205		retval = PTR_ERR(ohci_at91->fclk);
206		goto err;
207	}
208	ohci_at91->hclk = devm_clk_get(dev, "hclk");
209	if (IS_ERR(ohci_at91->hclk)) {
210		dev_err(dev, "failed to get hclk\n");
211		retval = PTR_ERR(ohci_at91->hclk);
212		goto err;
213	}
214
215	ohci_at91->sfr_regmap = at91_dt_syscon_sfr();
216	if (!ohci_at91->sfr_regmap)
217		dev_dbg(dev, "failed to find sfr node\n");
218
219	board = hcd->self.controller->platform_data;
220	ohci = hcd_to_ohci(hcd);
221	ohci->num_ports = board->ports;
222	at91_start_hc(pdev);
223
224	/*
225	 * The RemoteWakeupConnected bit has to be set explicitly
226	 * before calling ohci_run. The reset value of this bit is 0.
227	 */
228	ohci->hc_control = OHCI_CTRL_RWC;
229
230	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
231	if (retval == 0) {
232		device_wakeup_enable(hcd->self.controller);
233		return retval;
234	}
235
236	/* Error handling */
237	at91_stop_hc(pdev);
238
239 err:
240	usb_put_hcd(hcd);
241	return retval;
242}
243
244
245/* may be called with controller, bus, and devices active */
246
247/*
248 * usb_hcd_at91_remove - shutdown processing for AT91-based HCDs
249 * Context: !in_interrupt()
250 *
251 * Reverses the effect of usb_hcd_at91_probe(), first invoking
252 * the HCD's stop() method.  It is always called from a thread
253 * context, "rmmod" or something similar.
254 *
255 */
256static void usb_hcd_at91_remove(struct usb_hcd *hcd,
257				struct platform_device *pdev)
258{
259	usb_remove_hcd(hcd);
260	at91_stop_hc(pdev);
261	usb_put_hcd(hcd);
262}
263
264/*-------------------------------------------------------------------------*/
265static void ohci_at91_usb_set_power(struct at91_usbh_data *pdata, int port, int enable)
266{
267	if (!valid_port(port))
268		return;
269
270	gpiod_set_value(pdata->vbus_pin[port], enable);
271}
272
273static int ohci_at91_usb_get_power(struct at91_usbh_data *pdata, int port)
274{
275	if (!valid_port(port))
276		return -EINVAL;
277
278	return gpiod_get_value(pdata->vbus_pin[port]);
279}
280
281/*
282 * Update the status data from the hub with the over-current indicator change.
283 */
284static int ohci_at91_hub_status_data(struct usb_hcd *hcd, char *buf)
285{
286	struct at91_usbh_data *pdata = hcd->self.controller->platform_data;
287	int length = ohci_hub_status_data(hcd, buf);
288	int port;
289
290	at91_for_each_port(port) {
291		if (pdata->overcurrent_changed[port]) {
292			if (!length)
293				length = 1;
294			buf[0] |= 1 << (port + 1);
295		}
296	}
297
298	return length;
299}
300
301static int ohci_at91_port_suspend(struct regmap *regmap, u8 set)
302{
303	u32 regval;
304	int ret;
305
306	if (!regmap)
307		return 0;
308
309	ret = regmap_read(regmap, AT91_SFR_OHCIICR, &regval);
310	if (ret)
311		return ret;
312
313	if (set)
314		regval |= AT91_OHCIICR_USB_SUSPEND;
315	else
316		regval &= ~AT91_OHCIICR_USB_SUSPEND;
317
318	regmap_write(regmap, AT91_SFR_OHCIICR, regval);
319
320	return 0;
321}
322
323/*
324 * Look at the control requests to the root hub and see if we need to override.
325 */
326static int ohci_at91_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
327				 u16 wIndex, char *buf, u16 wLength)
328{
329	struct at91_usbh_data *pdata = dev_get_platdata(hcd->self.controller);
330	struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd);
331	struct usb_hub_descriptor *desc;
332	int ret = -EINVAL;
333	u32 *data = (u32 *)buf;
334
335	dev_dbg(hcd->self.controller,
336		"ohci_at91_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n",
337		hcd, typeReq, wValue, wIndex, buf, wLength);
338
339	wIndex--;
340
341	switch (typeReq) {
342	case SetPortFeature:
343		switch (wValue) {
344		case USB_PORT_FEAT_POWER:
345			dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n");
346			if (valid_port(wIndex)) {
347				ohci_at91_usb_set_power(pdata, wIndex, 1);
348				ret = 0;
349			}
350
351			goto out;
352
353		case USB_PORT_FEAT_SUSPEND:
354			dev_dbg(hcd->self.controller, "SetPortFeat: SUSPEND\n");
355			if (valid_port(wIndex) && ohci_at91->sfr_regmap) {
356				ohci_at91_port_suspend(ohci_at91->sfr_regmap,
357						       1);
358				return 0;
359			}
360			break;
361		}
362		break;
363
364	case ClearPortFeature:
365		switch (wValue) {
366		case USB_PORT_FEAT_C_OVER_CURRENT:
367			dev_dbg(hcd->self.controller,
368				"ClearPortFeature: C_OVER_CURRENT\n");
369
370			if (valid_port(wIndex)) {
371				pdata->overcurrent_changed[wIndex] = 0;
372				pdata->overcurrent_status[wIndex] = 0;
373			}
374
375			goto out;
376
377		case USB_PORT_FEAT_OVER_CURRENT:
378			dev_dbg(hcd->self.controller,
379				"ClearPortFeature: OVER_CURRENT\n");
380
381			if (valid_port(wIndex))
382				pdata->overcurrent_status[wIndex] = 0;
383
384			goto out;
385
386		case USB_PORT_FEAT_POWER:
387			dev_dbg(hcd->self.controller,
388				"ClearPortFeature: POWER\n");
389
390			if (valid_port(wIndex)) {
391				ohci_at91_usb_set_power(pdata, wIndex, 0);
392				return 0;
393			}
394			break;
395
396		case USB_PORT_FEAT_SUSPEND:
397			dev_dbg(hcd->self.controller, "ClearPortFeature: SUSPEND\n");
398			if (valid_port(wIndex) && ohci_at91->sfr_regmap) {
399				ohci_at91_port_suspend(ohci_at91->sfr_regmap,
400						       0);
401				return 0;
402			}
403			break;
404		}
405		break;
406	}
407
408	ret = ohci_hub_control(hcd, typeReq, wValue, wIndex + 1, buf, wLength);
409	if (ret)
410		goto out;
411
412	switch (typeReq) {
413	case GetHubDescriptor:
414
415		/* update the hub's descriptor */
416
417		desc = (struct usb_hub_descriptor *)buf;
418
419		dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n",
420			desc->wHubCharacteristics);
421
422		/* remove the old configurations for power-switching, and
423		 * over-current protection, and insert our new configuration
424		 */
425
426		desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM);
427		desc->wHubCharacteristics |=
428			cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM);
429
430		if (pdata->overcurrent_supported) {
431			desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM);
432			desc->wHubCharacteristics |=
433				cpu_to_le16(HUB_CHAR_INDV_PORT_OCPM);
434		}
435
436		dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n",
437			desc->wHubCharacteristics);
438
439		return ret;
440
441	case GetPortStatus:
442		/* check port status */
443
444		dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex);
445
446		if (valid_port(wIndex)) {
447			if (!ohci_at91_usb_get_power(pdata, wIndex))
448				*data &= ~cpu_to_le32(RH_PS_PPS);
449
450			if (pdata->overcurrent_changed[wIndex])
451				*data |= cpu_to_le32(RH_PS_OCIC);
452
453			if (pdata->overcurrent_status[wIndex])
454				*data |= cpu_to_le32(RH_PS_POCI);
455		}
456	}
457
458 out:
459	return ret;
460}
461
462/*-------------------------------------------------------------------------*/
463
464static irqreturn_t ohci_hcd_at91_overcurrent_irq(int irq, void *data)
465{
466	struct platform_device *pdev = data;
467	struct at91_usbh_data *pdata = dev_get_platdata(&pdev->dev);
468	int val, port;
469
470	/* From the GPIO notifying the over-current situation, find
471	 * out the corresponding port */
472	at91_for_each_port(port) {
473		if (gpiod_to_irq(pdata->overcurrent_pin[port]) == irq)
474			break;
475	}
476
477	if (port == AT91_MAX_USBH_PORTS) {
478		dev_err(& pdev->dev, "overcurrent interrupt from unknown GPIO\n");
479		return IRQ_HANDLED;
480	}
481
482	val = gpiod_get_value(pdata->overcurrent_pin[port]);
483
484	/* When notified of an over-current situation, disable power
485	   on the corresponding port, and mark this port in
486	   over-current. */
487	if (!val) {
488		ohci_at91_usb_set_power(pdata, port, 0);
489		pdata->overcurrent_status[port]  = 1;
490		pdata->overcurrent_changed[port] = 1;
491	}
492
493	dev_dbg(& pdev->dev, "overcurrent situation %s\n",
494		val ? "exited" : "notified");
495
496	return IRQ_HANDLED;
497}
498
499static const struct of_device_id at91_ohci_dt_ids[] = {
500	{ .compatible = "atmel,at91rm9200-ohci" },
501	{ /* sentinel */ }
502};
503
504MODULE_DEVICE_TABLE(of, at91_ohci_dt_ids);
505
506/*-------------------------------------------------------------------------*/
507
508static int ohci_hcd_at91_drv_probe(struct platform_device *pdev)
509{
510	struct device_node *np = pdev->dev.of_node;
511	struct at91_usbh_data	*pdata;
512	int			i;
513	int			ret;
514	int			err;
515	u32			ports;
516
517	/* Right now device-tree probed devices don't get dma_mask set.
518	 * Since shared usb code relies on it, set it here for now.
519	 * Once we have dma capability bindings this can go away.
520	 */
521	ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
522	if (ret)
523		return ret;
524
525	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
526	if (!pdata)
527		return -ENOMEM;
528
529	pdev->dev.platform_data = pdata;
530
531	if (!of_property_read_u32(np, "num-ports", &ports))
532		pdata->ports = ports;
533
534	at91_for_each_port(i) {
535		if (i >= pdata->ports)
536			break;
537
538		pdata->vbus_pin[i] =
539			devm_gpiod_get_index_optional(&pdev->dev, "atmel,vbus",
540						      i, GPIOD_OUT_HIGH);
541		if (IS_ERR(pdata->vbus_pin[i])) {
542			err = PTR_ERR(pdata->vbus_pin[i]);
543			dev_err(&pdev->dev, "unable to claim gpio \"vbus\": %d\n", err);
544			continue;
545		}
546	}
547
548	at91_for_each_port(i) {
549		if (i >= pdata->ports)
550			break;
551
552		pdata->overcurrent_pin[i] =
553			devm_gpiod_get_index_optional(&pdev->dev, "atmel,oc",
554						      i, GPIOD_IN);
555		if (!pdata->overcurrent_pin[i])
556			continue;
557		if (IS_ERR(pdata->overcurrent_pin[i])) {
558			err = PTR_ERR(pdata->overcurrent_pin[i]);
559			dev_err(&pdev->dev, "unable to claim gpio \"overcurrent\": %d\n", err);
560			continue;
561		}
562
563		ret = devm_request_irq(&pdev->dev,
564				       gpiod_to_irq(pdata->overcurrent_pin[i]),
565				       ohci_hcd_at91_overcurrent_irq,
566				       IRQF_SHARED,
567				       "ohci_overcurrent", pdev);
568		if (ret)
569			dev_info(&pdev->dev, "failed to request gpio \"overcurrent\" IRQ\n");
570	}
571
572	device_init_wakeup(&pdev->dev, 1);
573	return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev);
574}
575
576static int ohci_hcd_at91_drv_remove(struct platform_device *pdev)
577{
578	struct at91_usbh_data	*pdata = dev_get_platdata(&pdev->dev);
579	int			i;
580
581	if (pdata) {
582		at91_for_each_port(i)
583			ohci_at91_usb_set_power(pdata, i, 0);
584	}
585
586	device_init_wakeup(&pdev->dev, 0);
587	usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev);
588	return 0;
589}
590
591static int __maybe_unused
592ohci_hcd_at91_drv_suspend(struct device *dev)
593{
594	struct usb_hcd	*hcd = dev_get_drvdata(dev);
595	struct ohci_hcd	*ohci = hcd_to_ohci(hcd);
596	struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd);
597	int		ret;
598
599	/*
600	 * Disable wakeup if we are going to sleep with slow clock mode
601	 * enabled.
602	 */
603	ohci_at91->wakeup = device_may_wakeup(dev)
604			&& !at91_suspend_entering_slow_clock();
605
606	if (ohci_at91->wakeup)
607		enable_irq_wake(hcd->irq);
608
609	ret = ohci_suspend(hcd, ohci_at91->wakeup);
610	if (ret) {
611		if (ohci_at91->wakeup)
612			disable_irq_wake(hcd->irq);
613		return ret;
614	}
615	/*
616	 * The integrated transceivers seem unable to notice disconnect,
617	 * reconnect, or wakeup without the 48 MHz clock active.  so for
618	 * correctness, always discard connection state (using reset).
619	 *
620	 * REVISIT: some boards will be able to turn VBUS off...
621	 */
622	if (!ohci_at91->wakeup) {
623		ohci->rh_state = OHCI_RH_HALTED;
624
625		/* flush the writes */
626		(void) ohci_readl (ohci, &ohci->regs->control);
627		msleep(1);
628		ohci_at91_port_suspend(ohci_at91->sfr_regmap, 1);
629		at91_stop_clock(ohci_at91);
630	} else {
631		ohci_at91_port_suspend(ohci_at91->sfr_regmap, 1);
632	}
633
634	return ret;
635}
636
637static int __maybe_unused
638ohci_hcd_at91_drv_resume(struct device *dev)
639{
640	struct usb_hcd	*hcd = dev_get_drvdata(dev);
641	struct ohci_at91_priv *ohci_at91 = hcd_to_ohci_at91_priv(hcd);
642
643	ohci_at91_port_suspend(ohci_at91->sfr_regmap, 0);
644
645	if (ohci_at91->wakeup)
646		disable_irq_wake(hcd->irq);
647	else
648		at91_start_clock(ohci_at91);
649
650	/*
651	 * According to the comment in ohci_hcd_at91_drv_suspend()
652	 * we need to do a reset if the 48Mhz clock was stopped,
653	 * that is, if ohci_at91->wakeup is clear. Tell ohci_resume()
654	 * to reset in this case by setting its "hibernated" flag.
655	 */
656	ohci_resume(hcd, !ohci_at91->wakeup);
657
658	return 0;
659}
660
661static SIMPLE_DEV_PM_OPS(ohci_hcd_at91_pm_ops, ohci_hcd_at91_drv_suspend,
662					ohci_hcd_at91_drv_resume);
663
664static struct platform_driver ohci_hcd_at91_driver = {
665	.probe		= ohci_hcd_at91_drv_probe,
666	.remove		= ohci_hcd_at91_drv_remove,
667	.shutdown	= usb_hcd_platform_shutdown,
668	.driver		= {
669		.name	= "at91_ohci",
670		.pm	= &ohci_hcd_at91_pm_ops,
671		.of_match_table	= at91_ohci_dt_ids,
672	},
673};
674
675static int __init ohci_at91_init(void)
676{
677	if (usb_disabled())
678		return -ENODEV;
679
680	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
681	ohci_init_driver(&ohci_at91_hc_driver, &ohci_at91_drv_overrides);
682
683	/*
684	 * The Atmel HW has some unusual quirks, which require Atmel-specific
685	 * workarounds. We override certain hc_driver functions here to
686	 * achieve that. We explicitly do not enhance ohci_driver_overrides to
687	 * allow this more easily, since this is an unusual case, and we don't
688	 * want to encourage others to override these functions by making it
689	 * too easy.
690	 */
691
692	ohci_at91_hc_driver.hub_status_data	= ohci_at91_hub_status_data;
693	ohci_at91_hc_driver.hub_control		= ohci_at91_hub_control;
694
695	return platform_driver_register(&ohci_hcd_at91_driver);
696}
697module_init(ohci_at91_init);
698
699static void __exit ohci_at91_cleanup(void)
700{
701	platform_driver_unregister(&ohci_hcd_at91_driver);
702}
703module_exit(ohci_at91_cleanup);
704
705MODULE_DESCRIPTION(DRIVER_DESC);
706MODULE_LICENSE("GPL");
707MODULE_ALIAS("platform:at91_ohci");
708