1/*
2 * Renesas USB driver
3 *
4 * Copyright (C) 2011 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
15 *
16 */
17#include <linux/err.h>
18#include <linux/gpio.h>
19#include <linux/io.h>
20#include <linux/module.h>
21#include <linux/of_device.h>
22#include <linux/of_gpio.h>
23#include <linux/pm_runtime.h>
24#include <linux/slab.h>
25#include <linux/sysfs.h>
26#include "common.h"
27#include "rcar2.h"
28
29/*
30 *		image of renesas_usbhs
31 *
32 * ex) gadget case
33
34 * mod.c
35 * mod_gadget.c
36 * mod_host.c		pipe.c		fifo.c
37 *
38 *			+-------+	+-----------+
39 *			| pipe0 |------>| fifo pio  |
40 * +------------+	+-------+	+-----------+
41 * | mod_gadget |=====> | pipe1 |--+
42 * +------------+	+-------+  |	+-----------+
43 *			| pipe2 |  |  +-| fifo dma0 |
44 * +------------+	+-------+  |  |	+-----------+
45 * | mod_host   |	| pipe3 |<-|--+
46 * +------------+	+-------+  |	+-----------+
47 *			| ....  |  +--->| fifo dma1 |
48 *			| ....  |	+-----------+
49 */
50
51
52#define USBHSF_RUNTIME_PWCTRL	(1 << 0)
53
54/* status */
55#define usbhsc_flags_init(p)   do {(p)->flags = 0; } while (0)
56#define usbhsc_flags_set(p, b) ((p)->flags |=  (b))
57#define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b))
58#define usbhsc_flags_has(p, b) ((p)->flags &   (b))
59
60/*
61 * platform call back
62 *
63 * renesas usb support platform callback function.
64 * Below macro call it.
65 * if platform doesn't have callback, it return 0 (no error)
66 */
67#define usbhs_platform_call(priv, func, args...)\
68	(!(priv) ? -ENODEV :			\
69	 !((priv)->pfunc.func) ? 0 :		\
70	 (priv)->pfunc.func(args))
71
72/*
73 *		common functions
74 */
75u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
76{
77	return ioread16(priv->base + reg);
78}
79
80void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
81{
82	iowrite16(data, priv->base + reg);
83}
84
85void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data)
86{
87	u16 val = usbhs_read(priv, reg);
88
89	val &= ~mask;
90	val |= data & mask;
91
92	usbhs_write(priv, reg, val);
93}
94
95struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev)
96{
97	return dev_get_drvdata(&pdev->dev);
98}
99
100/*
101 *		syscfg functions
102 */
103static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
104{
105	usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
106}
107
108void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
109{
110	u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
111	u16 val  = DCFM | DRPD | HSE | USBE;
112	int has_otg = usbhs_get_dparam(priv, has_otg);
113
114	if (has_otg)
115		usbhs_bset(priv, DVSTCTR, (EXTLP | PWEN), (EXTLP | PWEN));
116
117	/*
118	 * if enable
119	 *
120	 * - select Host mode
121	 * - D+ Line/D- Line Pull-down
122	 */
123	usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
124}
125
126void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
127{
128	u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
129	u16 val  = HSE | USBE;
130
131	/*
132	 * if enable
133	 *
134	 * - select Function mode
135	 * - D+ Line Pull-up is disabled
136	 *      When D+ Line Pull-up is enabled,
137	 *      calling usbhs_sys_function_pullup(,1)
138	 */
139	usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
140}
141
142void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable)
143{
144	usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0);
145}
146
147void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode)
148{
149	usbhs_write(priv, TESTMODE, mode);
150}
151
152/*
153 *		frame functions
154 */
155int usbhs_frame_get_num(struct usbhs_priv *priv)
156{
157	return usbhs_read(priv, FRMNUM) & FRNM_MASK;
158}
159
160/*
161 *		usb request functions
162 */
163void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
164{
165	u16 val;
166
167	val = usbhs_read(priv, USBREQ);
168	req->bRequest		= (val >> 8) & 0xFF;
169	req->bRequestType	= (val >> 0) & 0xFF;
170
171	req->wValue	= usbhs_read(priv, USBVAL);
172	req->wIndex	= usbhs_read(priv, USBINDX);
173	req->wLength	= usbhs_read(priv, USBLENG);
174}
175
176void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
177{
178	usbhs_write(priv, USBREQ,  (req->bRequest << 8) | req->bRequestType);
179	usbhs_write(priv, USBVAL,  req->wValue);
180	usbhs_write(priv, USBINDX, req->wIndex);
181	usbhs_write(priv, USBLENG, req->wLength);
182
183	usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
184}
185
186/*
187 *		bus/vbus functions
188 */
189void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
190{
191	u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT);
192
193	if (status != USBRST) {
194		struct device *dev = usbhs_priv_to_dev(priv);
195		dev_err(dev, "usbhs should be reset\n");
196	}
197
198	usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT);
199}
200
201void usbhs_bus_send_reset(struct usbhs_priv *priv)
202{
203	usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST);
204}
205
206int usbhs_bus_get_speed(struct usbhs_priv *priv)
207{
208	u16 dvstctr = usbhs_read(priv, DVSTCTR);
209
210	switch (RHST & dvstctr) {
211	case RHST_LOW_SPEED:
212		return USB_SPEED_LOW;
213	case RHST_FULL_SPEED:
214		return USB_SPEED_FULL;
215	case RHST_HIGH_SPEED:
216		return USB_SPEED_HIGH;
217	}
218
219	return USB_SPEED_UNKNOWN;
220}
221
222int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable)
223{
224	struct platform_device *pdev = usbhs_priv_to_pdev(priv);
225
226	return usbhs_platform_call(priv, set_vbus, pdev, enable);
227}
228
229static void usbhsc_bus_init(struct usbhs_priv *priv)
230{
231	usbhs_write(priv, DVSTCTR, 0);
232
233	usbhs_vbus_ctrl(priv, 0);
234}
235
236/*
237 *		device configuration
238 */
239int usbhs_set_device_config(struct usbhs_priv *priv, int devnum,
240			   u16 upphub, u16 hubport, u16 speed)
241{
242	struct device *dev = usbhs_priv_to_dev(priv);
243	u16 usbspd = 0;
244	u32 reg = DEVADD0 + (2 * devnum);
245
246	if (devnum > 10) {
247		dev_err(dev, "cannot set speed to unknown device %d\n", devnum);
248		return -EIO;
249	}
250
251	if (upphub > 0xA) {
252		dev_err(dev, "unsupported hub number %d\n", upphub);
253		return -EIO;
254	}
255
256	switch (speed) {
257	case USB_SPEED_LOW:
258		usbspd = USBSPD_SPEED_LOW;
259		break;
260	case USB_SPEED_FULL:
261		usbspd = USBSPD_SPEED_FULL;
262		break;
263	case USB_SPEED_HIGH:
264		usbspd = USBSPD_SPEED_HIGH;
265		break;
266	default:
267		dev_err(dev, "unsupported speed %d\n", speed);
268		return -EIO;
269	}
270
271	usbhs_write(priv, reg,	UPPHUB(upphub)	|
272				HUBPORT(hubport)|
273				USBSPD(usbspd));
274
275	return 0;
276}
277
278/*
279 *		interrupt functions
280 */
281void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit)
282{
283	u16 pipe_mask = (u16)GENMASK(usbhs_get_dparam(priv, pipe_size), 0);
284
285	usbhs_write(priv, sts_reg, ~(1 << bit) & pipe_mask);
286}
287
288/*
289 *		local functions
290 */
291static void usbhsc_set_buswait(struct usbhs_priv *priv)
292{
293	int wait = usbhs_get_dparam(priv, buswait_bwait);
294
295	/* set bus wait if platform have */
296	if (wait)
297		usbhs_bset(priv, BUSWAIT, 0x000F, wait);
298}
299
300/*
301 *		platform default param
302 */
303
304/* commonly used on old SH-Mobile SoCs */
305static u32 usbhsc_default_pipe_type[] = {
306		USB_ENDPOINT_XFER_CONTROL,
307		USB_ENDPOINT_XFER_ISOC,
308		USB_ENDPOINT_XFER_ISOC,
309		USB_ENDPOINT_XFER_BULK,
310		USB_ENDPOINT_XFER_BULK,
311		USB_ENDPOINT_XFER_BULK,
312		USB_ENDPOINT_XFER_INT,
313		USB_ENDPOINT_XFER_INT,
314		USB_ENDPOINT_XFER_INT,
315		USB_ENDPOINT_XFER_INT,
316};
317
318/* commonly used on newer SH-Mobile and R-Car SoCs */
319static u32 usbhsc_new_pipe_type[] = {
320		USB_ENDPOINT_XFER_CONTROL,
321		USB_ENDPOINT_XFER_ISOC,
322		USB_ENDPOINT_XFER_ISOC,
323		USB_ENDPOINT_XFER_BULK,
324		USB_ENDPOINT_XFER_BULK,
325		USB_ENDPOINT_XFER_BULK,
326		USB_ENDPOINT_XFER_INT,
327		USB_ENDPOINT_XFER_INT,
328		USB_ENDPOINT_XFER_INT,
329		USB_ENDPOINT_XFER_BULK,
330		USB_ENDPOINT_XFER_BULK,
331		USB_ENDPOINT_XFER_BULK,
332		USB_ENDPOINT_XFER_BULK,
333		USB_ENDPOINT_XFER_BULK,
334		USB_ENDPOINT_XFER_BULK,
335		USB_ENDPOINT_XFER_BULK,
336};
337
338/*
339 *		power control
340 */
341static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
342{
343	struct platform_device *pdev = usbhs_priv_to_pdev(priv);
344	struct device *dev = usbhs_priv_to_dev(priv);
345
346	if (enable) {
347		/* enable PM */
348		pm_runtime_get_sync(dev);
349
350		/* enable platform power */
351		usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
352
353		/* USB on */
354		usbhs_sys_clock_ctrl(priv, enable);
355	} else {
356		/* USB off */
357		usbhs_sys_clock_ctrl(priv, enable);
358
359		/* disable platform power */
360		usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
361
362		/* disable PM */
363		pm_runtime_put_sync(dev);
364	}
365}
366
367/*
368 *		hotplug
369 */
370static void usbhsc_hotplug(struct usbhs_priv *priv)
371{
372	struct platform_device *pdev = usbhs_priv_to_pdev(priv);
373	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
374	int id;
375	int enable;
376	int cable;
377	int ret;
378
379	/*
380	 * get vbus status from platform
381	 */
382	enable = usbhs_platform_call(priv, get_vbus, pdev);
383
384	/*
385	 * get id from platform
386	 */
387	id = usbhs_platform_call(priv, get_id, pdev);
388
389	if (enable && !mod) {
390		if (priv->edev) {
391			cable = extcon_get_cable_state_(priv->edev, EXTCON_USB_HOST);
392			if ((cable > 0 && id != USBHS_HOST) ||
393			    (!cable && id != USBHS_GADGET)) {
394				dev_info(&pdev->dev,
395					 "USB cable plugged in doesn't match the selected role!\n");
396				return;
397			}
398		}
399
400		ret = usbhs_mod_change(priv, id);
401		if (ret < 0)
402			return;
403
404		dev_dbg(&pdev->dev, "%s enable\n", __func__);
405
406		/* power on */
407		if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
408			usbhsc_power_ctrl(priv, enable);
409
410		/* bus init */
411		usbhsc_set_buswait(priv);
412		usbhsc_bus_init(priv);
413
414		/* module start */
415		usbhs_mod_call(priv, start, priv);
416
417	} else if (!enable && mod) {
418		dev_dbg(&pdev->dev, "%s disable\n", __func__);
419
420		/* module stop */
421		usbhs_mod_call(priv, stop, priv);
422
423		/* bus init */
424		usbhsc_bus_init(priv);
425
426		/* power off */
427		if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
428			usbhsc_power_ctrl(priv, enable);
429
430		usbhs_mod_change(priv, -1);
431
432		/* reset phy for next connection */
433		usbhs_platform_call(priv, phy_reset, pdev);
434	}
435}
436
437/*
438 *		notify hotplug
439 */
440static void usbhsc_notify_hotplug(struct work_struct *work)
441{
442	struct usbhs_priv *priv = container_of(work,
443					       struct usbhs_priv,
444					       notify_hotplug_work.work);
445	usbhsc_hotplug(priv);
446}
447
448static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
449{
450	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
451	int delay = usbhs_get_dparam(priv, detection_delay);
452
453	/*
454	 * This functions will be called in interrupt.
455	 * To make sure safety context,
456	 * use workqueue for usbhs_notify_hotplug
457	 */
458	schedule_delayed_work(&priv->notify_hotplug_work,
459			      msecs_to_jiffies(delay));
460	return 0;
461}
462
463/*
464 *		platform functions
465 */
466static const struct of_device_id usbhs_of_match[] = {
467	{
468		.compatible = "renesas,usbhs-r8a7790",
469		.data = (void *)USBHS_TYPE_RCAR_GEN2,
470	},
471	{
472		.compatible = "renesas,usbhs-r8a7791",
473		.data = (void *)USBHS_TYPE_RCAR_GEN2,
474	},
475	{
476		.compatible = "renesas,usbhs-r8a7794",
477		.data = (void *)USBHS_TYPE_RCAR_GEN2,
478	},
479	{
480		/* Gen3 is compatible with Gen2 */
481		.compatible = "renesas,usbhs-r8a7795",
482		.data = (void *)USBHS_TYPE_RCAR_GEN2,
483	},
484	{ },
485};
486MODULE_DEVICE_TABLE(of, usbhs_of_match);
487
488static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
489{
490	struct renesas_usbhs_platform_info *info;
491	struct renesas_usbhs_driver_param *dparam;
492	const struct of_device_id *of_id = of_match_device(usbhs_of_match, dev);
493	u32 tmp;
494	int gpio;
495
496	info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
497	if (!info)
498		return NULL;
499
500	dparam = &info->driver_param;
501	dparam->type = of_id ? (uintptr_t)of_id->data : 0;
502	if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp))
503		dparam->buswait_bwait = tmp;
504	gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0,
505				       NULL);
506	if (gpio > 0)
507		dparam->enable_gpio = gpio;
508
509	if (dparam->type == USBHS_TYPE_RCAR_GEN2)
510		dparam->has_usb_dmac = 1;
511
512	return info;
513}
514
515static int usbhs_probe(struct platform_device *pdev)
516{
517	struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
518	struct renesas_usbhs_driver_callback *dfunc;
519	struct usbhs_priv *priv;
520	struct resource *res, *irq_res;
521	int ret;
522
523	/* check device node */
524	if (pdev->dev.of_node)
525		info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev);
526
527	/* check platform information */
528	if (!info) {
529		dev_err(&pdev->dev, "no platform information\n");
530		return -EINVAL;
531	}
532
533	/* platform data */
534	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
535	if (!irq_res) {
536		dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
537		return -ENODEV;
538	}
539
540	/* usb private data */
541	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
542	if (!priv)
543		return -ENOMEM;
544
545	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
546	priv->base = devm_ioremap_resource(&pdev->dev, res);
547	if (IS_ERR(priv->base))
548		return PTR_ERR(priv->base);
549
550	if (of_property_read_bool(pdev->dev.of_node, "extcon")) {
551		priv->edev = extcon_get_edev_by_phandle(&pdev->dev, 0);
552		if (IS_ERR(priv->edev))
553			return PTR_ERR(priv->edev);
554	}
555
556	/*
557	 * care platform info
558	 */
559
560	memcpy(&priv->dparam,
561	       &info->driver_param,
562	       sizeof(struct renesas_usbhs_driver_param));
563
564	switch (priv->dparam.type) {
565	case USBHS_TYPE_RCAR_GEN2:
566		priv->pfunc = usbhs_rcar2_ops;
567		if (!priv->dparam.pipe_type) {
568			priv->dparam.pipe_type = usbhsc_new_pipe_type;
569			priv->dparam.pipe_size =
570				ARRAY_SIZE(usbhsc_new_pipe_type);
571		}
572		break;
573	default:
574		if (!info->platform_callback.get_id) {
575			dev_err(&pdev->dev, "no platform callbacks");
576			return -EINVAL;
577		}
578		memcpy(&priv->pfunc,
579		       &info->platform_callback,
580		       sizeof(struct renesas_usbhs_platform_callback));
581		break;
582	}
583
584	/* set driver callback functions for platform */
585	dfunc			= &info->driver_callback;
586	dfunc->notify_hotplug	= usbhsc_drvcllbck_notify_hotplug;
587
588	/* set default param if platform doesn't have */
589	if (!priv->dparam.pipe_type) {
590		priv->dparam.pipe_type = usbhsc_default_pipe_type;
591		priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe_type);
592	}
593	if (!priv->dparam.pio_dma_border)
594		priv->dparam.pio_dma_border = 64; /* 64byte */
595
596	/* FIXME */
597	/* runtime power control ? */
598	if (priv->pfunc.get_vbus)
599		usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
600
601	/*
602	 * priv settings
603	 */
604	priv->irq	= irq_res->start;
605	if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
606		priv->irqflags = IRQF_SHARED;
607	priv->pdev	= pdev;
608	INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
609	spin_lock_init(usbhs_priv_to_lock(priv));
610
611	/* call pipe and module init */
612	ret = usbhs_pipe_probe(priv);
613	if (ret < 0)
614		return ret;
615
616	ret = usbhs_fifo_probe(priv);
617	if (ret < 0)
618		goto probe_end_pipe_exit;
619
620	ret = usbhs_mod_probe(priv);
621	if (ret < 0)
622		goto probe_end_fifo_exit;
623
624	/* dev_set_drvdata should be called after usbhs_mod_init */
625	platform_set_drvdata(pdev, priv);
626
627	/*
628	 * deviece reset here because
629	 * USB device might be used in boot loader.
630	 */
631	usbhs_sys_clock_ctrl(priv, 0);
632
633	/* check GPIO determining if USB function should be enabled */
634	if (priv->dparam.enable_gpio) {
635		gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL);
636		ret = !gpio_get_value(priv->dparam.enable_gpio);
637		gpio_free(priv->dparam.enable_gpio);
638		if (ret) {
639			dev_warn(&pdev->dev,
640				 "USB function not selected (GPIO %d)\n",
641				 priv->dparam.enable_gpio);
642			ret = -ENOTSUPP;
643			goto probe_end_mod_exit;
644		}
645	}
646
647	/*
648	 * platform call
649	 *
650	 * USB phy setup might depend on CPU/Board.
651	 * If platform has its callback functions,
652	 * call it here.
653	 */
654	ret = usbhs_platform_call(priv, hardware_init, pdev);
655	if (ret < 0) {
656		dev_err(&pdev->dev, "platform init failed.\n");
657		goto probe_end_mod_exit;
658	}
659
660	/* reset phy for connection */
661	usbhs_platform_call(priv, phy_reset, pdev);
662
663	/* power control */
664	pm_runtime_enable(&pdev->dev);
665	if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
666		usbhsc_power_ctrl(priv, 1);
667		usbhs_mod_autonomy_mode(priv);
668	}
669
670	/*
671	 * manual call notify_hotplug for cold plug
672	 */
673	usbhsc_drvcllbck_notify_hotplug(pdev);
674
675	dev_info(&pdev->dev, "probed\n");
676
677	return ret;
678
679probe_end_mod_exit:
680	usbhs_mod_remove(priv);
681probe_end_fifo_exit:
682	usbhs_fifo_remove(priv);
683probe_end_pipe_exit:
684	usbhs_pipe_remove(priv);
685
686	dev_info(&pdev->dev, "probe failed\n");
687
688	return ret;
689}
690
691static int usbhs_remove(struct platform_device *pdev)
692{
693	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
694	struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
695	struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
696
697	dev_dbg(&pdev->dev, "usb remove\n");
698
699	dfunc->notify_hotplug = NULL;
700
701	/* power off */
702	if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
703		usbhsc_power_ctrl(priv, 0);
704
705	pm_runtime_disable(&pdev->dev);
706
707	usbhs_platform_call(priv, hardware_exit, pdev);
708	usbhs_mod_remove(priv);
709	usbhs_fifo_remove(priv);
710	usbhs_pipe_remove(priv);
711
712	return 0;
713}
714
715static int usbhsc_suspend(struct device *dev)
716{
717	struct usbhs_priv *priv = dev_get_drvdata(dev);
718	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
719
720	if (mod) {
721		usbhs_mod_call(priv, stop, priv);
722		usbhs_mod_change(priv, -1);
723	}
724
725	if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
726		usbhsc_power_ctrl(priv, 0);
727
728	return 0;
729}
730
731static int usbhsc_resume(struct device *dev)
732{
733	struct usbhs_priv *priv = dev_get_drvdata(dev);
734	struct platform_device *pdev = usbhs_priv_to_pdev(priv);
735
736	if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
737		usbhsc_power_ctrl(priv, 1);
738
739	usbhs_platform_call(priv, phy_reset, pdev);
740
741	usbhsc_drvcllbck_notify_hotplug(pdev);
742
743	return 0;
744}
745
746static int usbhsc_runtime_nop(struct device *dev)
747{
748	/* Runtime PM callback shared between ->runtime_suspend()
749	 * and ->runtime_resume(). Simply returns success.
750	 *
751	 * This driver re-initializes all registers after
752	 * pm_runtime_get_sync() anyway so there is no need
753	 * to save and restore registers here.
754	 */
755	return 0;
756}
757
758static const struct dev_pm_ops usbhsc_pm_ops = {
759	.suspend		= usbhsc_suspend,
760	.resume			= usbhsc_resume,
761	.runtime_suspend	= usbhsc_runtime_nop,
762	.runtime_resume		= usbhsc_runtime_nop,
763};
764
765static struct platform_driver renesas_usbhs_driver = {
766	.driver		= {
767		.name	= "renesas_usbhs",
768		.pm	= &usbhsc_pm_ops,
769		.of_match_table = of_match_ptr(usbhs_of_match),
770	},
771	.probe		= usbhs_probe,
772	.remove		= usbhs_remove,
773};
774
775module_platform_driver(renesas_usbhs_driver);
776
777MODULE_LICENSE("GPL");
778MODULE_DESCRIPTION("Renesas USB driver");
779MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
780