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/io.h>
18 #include <linux/list.h>
19 #include <linux/module.h>
20 #include <linux/platform_device.h>
21 #include <linux/slab.h>
22 #include <linux/usb.h>
23 #include <linux/usb/hcd.h>
24 #include "common.h"
25 
26 /*
27  *** HARDWARE LIMITATION ***
28  *
29  * 1) renesas_usbhs has a limited number of controllable devices.
30  *    it can control only 9 devices in generally.
31  *	see DEVADDn / DCPMAXP / PIPEMAXP.
32  *
33  * 2) renesas_usbhs pipe number is limited.
34  *    the pipe will be re-used for each devices.
35  *    so, software should control DATA0/1 sequence of each devices.
36  */
37 
38 
39 /*
40  *		image of mod_host
41  *
42  * +--------+
43  * | udev 0 | --> it is used when set address
44  * +--------+
45  *
46  * +--------+					pipes are reused for each uep.
47  * | udev 1 |-+- [uep 0 (dcp) ] --+		pipe will be switched when
48  * +--------+ |			  |		other device requested
49  *	      +- [uep 1 (bulk)]	--|---+		   +--------------+
50  *	      |			  +--------------> | pipe0 (dcp)  |
51  *	      +- [uep 2 (bulk)]	-@    |		   +--------------+
52  *				      |		   | pipe1 (isoc) |
53  * +--------+			      |		   +--------------+
54  * | udev 2 |-+- [uep 0 (dcp) ]	-@    +----------> | pipe2 (bulk) |
55  * +--------+ |					   +--------------+
56  *	      +- [uep 1 (int) ]	----+	  +------> | pipe3 (bulk) |
57  *				    |	  |	   +--------------+
58  * +--------+			    +-----|------> | pipe4 (int)  |
59  * | udev 3 |-+- [uep 0 (dcp) ]	-@	  |	   +--------------+
60  * +--------+ |				  |	   | ....	  |
61  *	      +- [uep 1 (bulk)]	-@	  |	   | ....	  |
62  *	      |				  |
63  *	      +- [uep 2 (bulk)]-----------+
64  *
65  * @ :	uep requested free pipe, but all have been used.
66  *	now it is waiting for free pipe
67  */
68 
69 
70 /*
71  *		struct
72  */
73 struct usbhsh_request {
74 	struct urb		*urb;
75 	struct usbhs_pkt	pkt;
76 };
77 
78 struct usbhsh_device {
79 	struct usb_device	*usbv;
80 	struct list_head	ep_list_head; /* list of usbhsh_ep */
81 };
82 
83 struct usbhsh_ep {
84 	struct usbhs_pipe	*pipe;   /* attached pipe */
85 	struct usbhsh_device	*udev;   /* attached udev */
86 	struct usb_host_endpoint *ep;
87 	struct list_head	ep_list; /* list to usbhsh_device */
88 	unsigned int		counter; /* pipe attach counter */
89 };
90 
91 #define USBHSH_DEVICE_MAX	10 /* see DEVADDn / DCPMAXP / PIPEMAXP */
92 #define USBHSH_PORT_MAX		 7 /* see DEVADDn :: HUBPORT */
93 struct usbhsh_hpriv {
94 	struct usbhs_mod	mod;
95 	struct usbhs_pipe	*dcp;
96 
97 	struct usbhsh_device	udev[USBHSH_DEVICE_MAX];
98 
99 	u32	port_stat;	/* USB_PORT_STAT_xxx */
100 
101 	struct completion	setup_ack_done;
102 };
103 
104 
105 static const char usbhsh_hcd_name[] = "renesas_usbhs host";
106 
107 /*
108  *		macro
109  */
110 #define usbhsh_priv_to_hpriv(priv) \
111 	container_of(usbhs_mod_get(priv, USBHS_HOST), struct usbhsh_hpriv, mod)
112 
113 #define __usbhsh_for_each_udev(start, pos, h, i)	\
114 	for ((i) = start;						\
115 	     ((i) < USBHSH_DEVICE_MAX) && ((pos) = (h)->udev + (i));	\
116 	     (i)++)
117 
118 #define usbhsh_for_each_udev(pos, hpriv, i)	\
119 	__usbhsh_for_each_udev(1, pos, hpriv, i)
120 
121 #define usbhsh_for_each_udev_with_dev0(pos, hpriv, i)	\
122 	__usbhsh_for_each_udev(0, pos, hpriv, i)
123 
124 #define usbhsh_hcd_to_hpriv(h)	(struct usbhsh_hpriv *)((h)->hcd_priv)
125 #define usbhsh_hcd_to_dev(h)	((h)->self.controller)
126 
127 #define usbhsh_hpriv_to_priv(h)	((h)->mod.priv)
128 #define usbhsh_hpriv_to_dcp(h)	((h)->dcp)
129 #define usbhsh_hpriv_to_hcd(h)	\
130 	container_of((void *)h, struct usb_hcd, hcd_priv)
131 
132 #define usbhsh_ep_to_uep(u)	((u)->hcpriv)
133 #define usbhsh_uep_to_pipe(u)	((u)->pipe)
134 #define usbhsh_uep_to_udev(u)	((u)->udev)
135 #define usbhsh_uep_to_ep(u)	((u)->ep)
136 
137 #define usbhsh_urb_to_ureq(u)	((u)->hcpriv)
138 #define usbhsh_urb_to_usbv(u)	((u)->dev)
139 
140 #define usbhsh_usbv_to_udev(d)	dev_get_drvdata(&(d)->dev)
141 
142 #define usbhsh_udev_to_usbv(h)	((h)->usbv)
143 #define usbhsh_udev_is_used(h)	usbhsh_udev_to_usbv(h)
144 
145 #define usbhsh_pipe_to_uep(p)	((p)->mod_private)
146 
147 #define usbhsh_device_parent(d)		(usbhsh_usbv_to_udev((d)->usbv->parent))
148 #define usbhsh_device_hubport(d)	((d)->usbv->portnum)
149 #define usbhsh_device_number(h, d)	((int)((d) - (h)->udev))
150 #define usbhsh_device_nth(h, d)		((h)->udev + d)
151 #define usbhsh_device0(h)		usbhsh_device_nth(h, 0)
152 
153 #define usbhsh_port_stat_init(h)	((h)->port_stat = 0)
154 #define usbhsh_port_stat_set(h, s)	((h)->port_stat |= (s))
155 #define usbhsh_port_stat_clear(h, s)	((h)->port_stat &= ~(s))
156 #define usbhsh_port_stat_get(h)		((h)->port_stat)
157 
158 #define usbhsh_pkt_to_ureq(p)	\
159 	container_of((void *)p, struct usbhsh_request, pkt)
160 
161 /*
162  *		req alloc/free
163  */
164 static struct usbhsh_request *usbhsh_ureq_alloc(struct usbhsh_hpriv *hpriv,
165 					       struct urb *urb,
166 					       gfp_t mem_flags)
167 {
168 	struct usbhsh_request *ureq;
169 
170 	ureq = kzalloc(sizeof(struct usbhsh_request), mem_flags);
171 	if (!ureq)
172 		return NULL;
173 
174 	usbhs_pkt_init(&ureq->pkt);
175 	ureq->urb = urb;
176 	usbhsh_urb_to_ureq(urb) = ureq;
177 
178 	return ureq;
179 }
180 
181 static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv,
182 			    struct usbhsh_request *ureq)
183 {
184 	usbhsh_urb_to_ureq(ureq->urb) = NULL;
185 	ureq->urb = NULL;
186 
187 	kfree(ureq);
188 }
189 
190 /*
191  *		status
192  */
193 static int usbhsh_is_running(struct usbhsh_hpriv *hpriv)
194 {
195 	/*
196 	 * we can decide some device is attached or not
197 	 * by checking mod.irq_attch
198 	 * see
199 	 *	usbhsh_irq_attch()
200 	 *	usbhsh_irq_dtch()
201 	 */
202 	return (hpriv->mod.irq_attch == NULL);
203 }
204 
205 /*
206  *		pipe control
207  */
208 static void usbhsh_endpoint_sequence_save(struct usbhsh_hpriv *hpriv,
209 					  struct urb *urb,
210 					  struct usbhs_pkt *pkt)
211 {
212 	int len = urb->actual_length;
213 	int maxp = usb_endpoint_maxp(&urb->ep->desc);
214 	int t = 0;
215 
216 	/* DCP is out of sequence control */
217 	if (usb_pipecontrol(urb->pipe))
218 		return;
219 
220 	/*
221 	 * renesas_usbhs pipe has a limitation in a number.
222 	 * So, driver should re-use the limited pipe for each device/endpoint.
223 	 * DATA0/1 sequence should be saved for it.
224 	 * see [image of mod_host]
225 	 *     [HARDWARE LIMITATION]
226 	 */
227 
228 	/*
229 	 * next sequence depends on actual_length
230 	 *
231 	 * ex) actual_length = 1147, maxp = 512
232 	 * data0 : 512
233 	 * data1 : 512
234 	 * data0 : 123
235 	 * data1 is the next sequence
236 	 */
237 	t = len / maxp;
238 	if (len % maxp)
239 		t++;
240 	if (pkt->zero)
241 		t++;
242 	t %= 2;
243 
244 	if (t)
245 		usb_dotoggle(urb->dev,
246 			     usb_pipeendpoint(urb->pipe),
247 			     usb_pipeout(urb->pipe));
248 }
249 
250 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
251 					       struct urb *urb);
252 
253 static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv,
254 			      struct urb *urb)
255 {
256 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
257 	struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
258 	struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
259 	struct usbhs_pipe *pipe;
260 	struct usb_endpoint_descriptor *desc = &urb->ep->desc;
261 	struct device *dev = usbhs_priv_to_dev(priv);
262 	unsigned long flags;
263 	int dir_in_req = !!usb_pipein(urb->pipe);
264 	int is_dcp = usb_endpoint_xfer_control(desc);
265 	int i, dir_in;
266 	int ret = -EBUSY;
267 
268 	/********************  spin lock ********************/
269 	usbhs_lock(priv, flags);
270 
271 	/*
272 	 * if uep has been attached to pipe,
273 	 * reuse it
274 	 */
275 	if (usbhsh_uep_to_pipe(uep)) {
276 		ret = 0;
277 		goto usbhsh_pipe_attach_done;
278 	}
279 
280 	usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
281 
282 		/* check pipe type */
283 		if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc)))
284 			continue;
285 
286 		/* check pipe direction if normal pipe */
287 		if (!is_dcp) {
288 			dir_in = !!usbhs_pipe_is_dir_in(pipe);
289 			if (0 != (dir_in - dir_in_req))
290 				continue;
291 		}
292 
293 		/* check pipe is free */
294 		if (usbhsh_pipe_to_uep(pipe))
295 			continue;
296 
297 		/*
298 		 * attach pipe to uep
299 		 *
300 		 * usbhs_pipe_config_update() should be called after
301 		 * usbhs_set_device_config()
302 		 * see
303 		 *  DCPMAXP/PIPEMAXP
304 		 */
305 		usbhsh_uep_to_pipe(uep)		= pipe;
306 		usbhsh_pipe_to_uep(pipe)	= uep;
307 
308 		usbhs_pipe_config_update(pipe,
309 					 usbhsh_device_number(hpriv, udev),
310 					 usb_endpoint_num(desc),
311 					 usb_endpoint_maxp(desc));
312 
313 		dev_dbg(dev, "%s [%d-%d(%s:%s)]\n", __func__,
314 			usbhsh_device_number(hpriv, udev),
315 			usb_endpoint_num(desc),
316 			usbhs_pipe_name(pipe),
317 			dir_in_req ? "in" : "out");
318 
319 		ret = 0;
320 		break;
321 	}
322 
323 usbhsh_pipe_attach_done:
324 	if (0 == ret)
325 		uep->counter++;
326 
327 	usbhs_unlock(priv, flags);
328 	/********************  spin unlock ******************/
329 
330 	return ret;
331 }
332 
333 static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv,
334 			       struct usbhsh_ep *uep)
335 {
336 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
337 	struct usbhs_pipe *pipe;
338 	struct device *dev = usbhs_priv_to_dev(priv);
339 	unsigned long flags;
340 
341 	if (unlikely(!uep)) {
342 		dev_err(dev, "no uep\n");
343 		return;
344 	}
345 
346 	/********************  spin lock ********************/
347 	usbhs_lock(priv, flags);
348 
349 	pipe = usbhsh_uep_to_pipe(uep);
350 
351 	if (unlikely(!pipe)) {
352 		dev_err(dev, "uep doens't have pipe\n");
353 	} else if (1 == uep->counter--) { /* last user */
354 		struct usb_host_endpoint *ep = usbhsh_uep_to_ep(uep);
355 		struct usbhsh_device *udev = usbhsh_uep_to_udev(uep);
356 
357 		/* detach pipe from uep */
358 		usbhsh_uep_to_pipe(uep)		= NULL;
359 		usbhsh_pipe_to_uep(pipe)	= NULL;
360 
361 		dev_dbg(dev, "%s [%d-%d(%s)]\n", __func__,
362 			usbhsh_device_number(hpriv, udev),
363 			usb_endpoint_num(&ep->desc),
364 			usbhs_pipe_name(pipe));
365 	}
366 
367 	usbhs_unlock(priv, flags);
368 	/********************  spin unlock ******************/
369 }
370 
371 /*
372  *		endpoint control
373  */
374 static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv,
375 				  struct urb *urb,
376 				  gfp_t mem_flags)
377 {
378 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
379 	struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
380 	struct usb_host_endpoint *ep = urb->ep;
381 	struct usbhsh_ep *uep;
382 	struct device *dev = usbhs_priv_to_dev(priv);
383 	struct usb_endpoint_descriptor *desc = &ep->desc;
384 	unsigned long flags;
385 
386 	uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags);
387 	if (!uep)
388 		return -ENOMEM;
389 
390 	/********************  spin lock ********************/
391 	usbhs_lock(priv, flags);
392 
393 	/*
394 	 * init endpoint
395 	 */
396 	uep->counter = 0;
397 	INIT_LIST_HEAD(&uep->ep_list);
398 	list_add_tail(&uep->ep_list, &udev->ep_list_head);
399 
400 	usbhsh_uep_to_udev(uep)	= udev;
401 	usbhsh_uep_to_ep(uep)	= ep;
402 	usbhsh_ep_to_uep(ep)	= uep;
403 
404 	usbhs_unlock(priv, flags);
405 	/********************  spin unlock ******************/
406 
407 	dev_dbg(dev, "%s [%d-%d]\n", __func__,
408 		usbhsh_device_number(hpriv, udev),
409 		usb_endpoint_num(desc));
410 
411 	return 0;
412 }
413 
414 static void usbhsh_endpoint_detach(struct usbhsh_hpriv *hpriv,
415 				   struct usb_host_endpoint *ep)
416 {
417 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
418 	struct device *dev = usbhs_priv_to_dev(priv);
419 	struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
420 	unsigned long flags;
421 
422 	if (!uep)
423 		return;
424 
425 	dev_dbg(dev, "%s [%d-%d]\n", __func__,
426 		usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)),
427 		usb_endpoint_num(&ep->desc));
428 
429 	if (usbhsh_uep_to_pipe(uep))
430 		usbhsh_pipe_detach(hpriv, uep);
431 
432 	/********************  spin lock ********************/
433 	usbhs_lock(priv, flags);
434 
435 	/* remove this endpoint from udev */
436 	list_del_init(&uep->ep_list);
437 
438 	usbhsh_uep_to_udev(uep)	= NULL;
439 	usbhsh_uep_to_ep(uep)	= NULL;
440 	usbhsh_ep_to_uep(ep)	= NULL;
441 
442 	usbhs_unlock(priv, flags);
443 	/********************  spin unlock ******************/
444 
445 	kfree(uep);
446 }
447 
448 static void usbhsh_endpoint_detach_all(struct usbhsh_hpriv *hpriv,
449 				       struct usbhsh_device *udev)
450 {
451 	struct usbhsh_ep *uep, *next;
452 
453 	list_for_each_entry_safe(uep, next, &udev->ep_list_head, ep_list)
454 		usbhsh_endpoint_detach(hpriv, usbhsh_uep_to_ep(uep));
455 }
456 
457 /*
458  *		device control
459  */
460 static int usbhsh_connected_to_rhdev(struct usb_hcd *hcd,
461 				     struct usbhsh_device *udev)
462 {
463 	struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
464 
465 	return hcd->self.root_hub == usbv->parent;
466 }
467 
468 static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
469 {
470 	return !list_empty(&udev->ep_list_head);
471 }
472 
473 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
474 					       struct urb *urb)
475 {
476 	struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
477 	struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
478 
479 	/* usbhsh_device_attach() is still not called */
480 	if (!udev)
481 		return NULL;
482 
483 	/* if it is device0, return it */
484 	if (0 == usb_pipedevice(urb->pipe))
485 		return usbhsh_device0(hpriv);
486 
487 	/* return attached device */
488 	return udev;
489 }
490 
491 static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv,
492 						 struct urb *urb)
493 {
494 	struct usbhsh_device *udev = NULL;
495 	struct usbhsh_device *udev0 = usbhsh_device0(hpriv);
496 	struct usbhsh_device *pos;
497 	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
498 	struct device *dev = usbhsh_hcd_to_dev(hcd);
499 	struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
500 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
501 	unsigned long flags;
502 	u16 upphub, hubport;
503 	int i;
504 
505 	/*
506 	 * This function should be called only while urb is pointing to device0.
507 	 * It will attach unused usbhsh_device to urb (usbv),
508 	 * and initialize device0.
509 	 * You can use usbhsh_device_get() to get "current" udev,
510 	 * and usbhsh_usbv_to_udev() is for "attached" udev.
511 	 */
512 	if (0 != usb_pipedevice(urb->pipe)) {
513 		dev_err(dev, "%s fail: urb isn't pointing device0\n", __func__);
514 		return NULL;
515 	}
516 
517 	/********************  spin lock ********************/
518 	usbhs_lock(priv, flags);
519 
520 	/*
521 	 * find unused device
522 	 */
523 	usbhsh_for_each_udev(pos, hpriv, i) {
524 		if (usbhsh_udev_is_used(pos))
525 			continue;
526 		udev = pos;
527 		break;
528 	}
529 
530 	if (udev) {
531 		/*
532 		 * usbhsh_usbv_to_udev()
533 		 * usbhsh_udev_to_usbv()
534 		 * will be enable
535 		 */
536 		dev_set_drvdata(&usbv->dev, udev);
537 		udev->usbv = usbv;
538 	}
539 
540 	usbhs_unlock(priv, flags);
541 	/********************  spin unlock ******************/
542 
543 	if (!udev) {
544 		dev_err(dev, "no free usbhsh_device\n");
545 		return NULL;
546 	}
547 
548 	if (usbhsh_device_has_endpoint(udev)) {
549 		dev_warn(dev, "udev have old endpoint\n");
550 		usbhsh_endpoint_detach_all(hpriv, udev);
551 	}
552 
553 	if (usbhsh_device_has_endpoint(udev0)) {
554 		dev_warn(dev, "udev0 have old endpoint\n");
555 		usbhsh_endpoint_detach_all(hpriv, udev0);
556 	}
557 
558 	/* uep will be attached */
559 	INIT_LIST_HEAD(&udev0->ep_list_head);
560 	INIT_LIST_HEAD(&udev->ep_list_head);
561 
562 	/*
563 	 * set device0 config
564 	 */
565 	usbhs_set_device_config(priv,
566 				0, 0, 0, usbv->speed);
567 
568 	/*
569 	 * set new device config
570 	 */
571 	upphub	= 0;
572 	hubport	= 0;
573 	if (!usbhsh_connected_to_rhdev(hcd, udev)) {
574 		/* if udev is not connected to rhdev, it means parent is Hub */
575 		struct usbhsh_device *parent = usbhsh_device_parent(udev);
576 
577 		upphub	= usbhsh_device_number(hpriv, parent);
578 		hubport	= usbhsh_device_hubport(udev);
579 
580 		dev_dbg(dev, "%s connected to Hub [%d:%d](%p)\n", __func__,
581 			upphub, hubport, parent);
582 	}
583 
584 	usbhs_set_device_config(priv,
585 			       usbhsh_device_number(hpriv, udev),
586 			       upphub, hubport, usbv->speed);
587 
588 	dev_dbg(dev, "%s [%d](%p)\n", __func__,
589 		usbhsh_device_number(hpriv, udev), udev);
590 
591 	return udev;
592 }
593 
594 static void usbhsh_device_detach(struct usbhsh_hpriv *hpriv,
595 			       struct usbhsh_device *udev)
596 {
597 	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
598 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
599 	struct device *dev = usbhsh_hcd_to_dev(hcd);
600 	struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
601 	unsigned long flags;
602 
603 	dev_dbg(dev, "%s [%d](%p)\n", __func__,
604 		usbhsh_device_number(hpriv, udev), udev);
605 
606 	if (usbhsh_device_has_endpoint(udev)) {
607 		dev_warn(dev, "udev still have endpoint\n");
608 		usbhsh_endpoint_detach_all(hpriv, udev);
609 	}
610 
611 	/*
612 	 * There is nothing to do if it is device0.
613 	 * see
614 	 *  usbhsh_device_attach()
615 	 *  usbhsh_device_get()
616 	 */
617 	if (0 == usbhsh_device_number(hpriv, udev))
618 		return;
619 
620 	/********************  spin lock ********************/
621 	usbhs_lock(priv, flags);
622 
623 	/*
624 	 * usbhsh_usbv_to_udev()
625 	 * usbhsh_udev_to_usbv()
626 	 * will be disable
627 	 */
628 	dev_set_drvdata(&usbv->dev, NULL);
629 	udev->usbv = NULL;
630 
631 	usbhs_unlock(priv, flags);
632 	/********************  spin unlock ******************/
633 }
634 
635 /*
636  *		queue push/pop
637  */
638 static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
639 {
640 	struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
641 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
642 	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
643 	struct urb *urb = ureq->urb;
644 	struct device *dev = usbhs_priv_to_dev(priv);
645 	int status = 0;
646 
647 	dev_dbg(dev, "%s\n", __func__);
648 
649 	if (!urb) {
650 		dev_warn(dev, "pkt doesn't have urb\n");
651 		return;
652 	}
653 
654 	if (!usbhsh_is_running(hpriv))
655 		status = -ESHUTDOWN;
656 
657 	urb->actual_length = pkt->actual;
658 
659 	usbhsh_endpoint_sequence_save(hpriv, urb, pkt);
660 	usbhsh_ureq_free(hpriv, ureq);
661 
662 	usbhsh_pipe_detach(hpriv, usbhsh_ep_to_uep(urb->ep));
663 
664 	usb_hcd_unlink_urb_from_ep(hcd, urb);
665 	usb_hcd_giveback_urb(hcd, urb, status);
666 }
667 
668 static int usbhsh_queue_push(struct usb_hcd *hcd,
669 			     struct urb *urb,
670 			     gfp_t mem_flags)
671 {
672 	struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
673 	struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
674 	struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
675 	struct device *dev = usbhsh_hcd_to_dev(hcd);
676 	struct usbhsh_request *ureq;
677 	void *buf;
678 	int len, sequence;
679 
680 	if (usb_pipeisoc(urb->pipe)) {
681 		dev_err(dev, "pipe iso is not supported now\n");
682 		return -EIO;
683 	}
684 
685 	/* this ureq will be freed on usbhsh_queue_done() */
686 	ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
687 	if (unlikely(!ureq)) {
688 		dev_err(dev, "ureq alloc fail\n");
689 		return -ENOMEM;
690 	}
691 
692 	if (usb_pipein(urb->pipe))
693 		pipe->handler = &usbhs_fifo_dma_pop_handler;
694 	else
695 		pipe->handler = &usbhs_fifo_dma_push_handler;
696 
697 	buf = (void *)(urb->transfer_buffer + urb->actual_length);
698 	len = urb->transfer_buffer_length - urb->actual_length;
699 
700 	sequence = usb_gettoggle(urb->dev,
701 				 usb_pipeendpoint(urb->pipe),
702 				 usb_pipeout(urb->pipe));
703 
704 	dev_dbg(dev, "%s\n", __func__);
705 	usbhs_pkt_push(pipe, &ureq->pkt, usbhsh_queue_done,
706 		       buf, len, (urb->transfer_flags & URB_ZERO_PACKET),
707 		       sequence);
708 
709 	usbhs_pkt_start(pipe);
710 
711 	return 0;
712 }
713 
714 static void usbhsh_queue_force_pop(struct usbhs_priv *priv,
715 				   struct usbhs_pipe *pipe)
716 {
717 	struct usbhs_pkt *pkt;
718 
719 	while (1) {
720 		pkt = usbhs_pkt_pop(pipe, NULL);
721 		if (!pkt)
722 			break;
723 
724 		/*
725 		 * if all packet are gone, usbhsh_endpoint_disable()
726 		 * will be called.
727 		 * then, attached device/endpoint/pipe will be detached
728 		 */
729 		usbhsh_queue_done(priv, pkt);
730 	}
731 }
732 
733 static void usbhsh_queue_force_pop_all(struct usbhs_priv *priv)
734 {
735 	struct usbhs_pipe *pos;
736 	int i;
737 
738 	usbhs_for_each_pipe_with_dcp(pos, priv, i)
739 		usbhsh_queue_force_pop(priv, pos);
740 }
741 
742 /*
743  *		DCP setup stage
744  */
745 static int usbhsh_is_request_address(struct urb *urb)
746 {
747 	struct usb_ctrlrequest *req;
748 
749 	req = (struct usb_ctrlrequest *)urb->setup_packet;
750 
751 	if ((DeviceOutRequest    == req->bRequestType << 8) &&
752 	    (USB_REQ_SET_ADDRESS == req->bRequest))
753 		return 1;
754 	else
755 		return 0;
756 }
757 
758 static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv,
759 					   struct urb *urb,
760 					   struct usbhs_pipe *pipe)
761 {
762 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
763 	struct usb_ctrlrequest req;
764 	struct device *dev = usbhs_priv_to_dev(priv);
765 
766 	/*
767 	 * wait setup packet ACK
768 	 * see
769 	 *	usbhsh_irq_setup_ack()
770 	 *	usbhsh_irq_setup_err()
771 	 */
772 	init_completion(&hpriv->setup_ack_done);
773 
774 	/* copy original request */
775 	memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest));
776 
777 	/*
778 	 * renesas_usbhs can not use original usb address.
779 	 * see HARDWARE LIMITATION.
780 	 * modify usb address here to use attached device.
781 	 * see usbhsh_device_attach()
782 	 */
783 	if (usbhsh_is_request_address(urb)) {
784 		struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
785 		struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
786 
787 		/* udev is a attached device */
788 		req.wValue = usbhsh_device_number(hpriv, udev);
789 		dev_dbg(dev, "create new address - %d\n", req.wValue);
790 	}
791 
792 	/* set request */
793 	usbhs_usbreq_set_val(priv, &req);
794 
795 	/*
796 	 * wait setup packet ACK
797 	 */
798 	wait_for_completion(&hpriv->setup_ack_done);
799 
800 	dev_dbg(dev, "%s done\n", __func__);
801 }
802 
803 /*
804  *		DCP data stage
805  */
806 static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv,
807 					  struct usbhs_pkt *pkt)
808 {
809 	struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
810 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
811 
812 	/* this ureq was connected to urb when usbhsh_urb_enqueue()  */
813 
814 	usbhsh_ureq_free(hpriv, ureq);
815 }
816 
817 static int usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv,
818 					 struct urb *urb,
819 					 struct usbhs_pipe *pipe,
820 					 gfp_t mem_flags)
821 
822 {
823 	struct usbhsh_request *ureq;
824 
825 	/* this ureq will be freed on usbhsh_data_stage_packet_done() */
826 	ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
827 	if (unlikely(!ureq))
828 		return -ENOMEM;
829 
830 	if (usb_pipein(urb->pipe))
831 		pipe->handler = &usbhs_dcp_data_stage_in_handler;
832 	else
833 		pipe->handler = &usbhs_dcp_data_stage_out_handler;
834 
835 	usbhs_pkt_push(pipe, &ureq->pkt,
836 		       usbhsh_data_stage_packet_done,
837 		       urb->transfer_buffer,
838 		       urb->transfer_buffer_length,
839 		       (urb->transfer_flags & URB_ZERO_PACKET),
840 		       -1);
841 
842 	return 0;
843 }
844 
845 /*
846  *		DCP status stage
847  */
848 static int usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv,
849 					    struct urb *urb,
850 					    struct usbhs_pipe *pipe,
851 					    gfp_t mem_flags)
852 {
853 	struct usbhsh_request *ureq;
854 
855 	/* This ureq will be freed on usbhsh_queue_done() */
856 	ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
857 	if (unlikely(!ureq))
858 		return -ENOMEM;
859 
860 	if (usb_pipein(urb->pipe))
861 		pipe->handler = &usbhs_dcp_status_stage_in_handler;
862 	else
863 		pipe->handler = &usbhs_dcp_status_stage_out_handler;
864 
865 	usbhs_pkt_push(pipe, &ureq->pkt,
866 		       usbhsh_queue_done,
867 		       NULL,
868 		       urb->transfer_buffer_length,
869 		       0, -1);
870 
871 	return 0;
872 }
873 
874 static int usbhsh_dcp_queue_push(struct usb_hcd *hcd,
875 				 struct urb *urb,
876 				 gfp_t mflags)
877 {
878 	struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
879 	struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
880 	struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
881 	struct device *dev = usbhsh_hcd_to_dev(hcd);
882 	int ret;
883 
884 	dev_dbg(dev, "%s\n", __func__);
885 
886 	/*
887 	 * setup stage
888 	 *
889 	 * usbhsh_send_setup_stage_packet() wait SACK/SIGN
890 	 */
891 	usbhsh_setup_stage_packet_push(hpriv, urb, pipe);
892 
893 	/*
894 	 * data stage
895 	 *
896 	 * It is pushed only when urb has buffer.
897 	 */
898 	if (urb->transfer_buffer_length) {
899 		ret = usbhsh_data_stage_packet_push(hpriv, urb, pipe, mflags);
900 		if (ret < 0) {
901 			dev_err(dev, "data stage failed\n");
902 			return ret;
903 		}
904 	}
905 
906 	/*
907 	 * status stage
908 	 */
909 	ret = usbhsh_status_stage_packet_push(hpriv, urb, pipe, mflags);
910 	if (ret < 0) {
911 		dev_err(dev, "status stage failed\n");
912 		return ret;
913 	}
914 
915 	/*
916 	 * start pushed packets
917 	 */
918 	usbhs_pkt_start(pipe);
919 
920 	return 0;
921 }
922 
923 /*
924  *		dma map functions
925  */
926 static int usbhsh_dma_map_ctrl(struct device *dma_dev, struct usbhs_pkt *pkt,
927 			       int map)
928 {
929 	if (map) {
930 		struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
931 		struct urb *urb = ureq->urb;
932 
933 		/* it can not use scatter/gather */
934 		if (urb->num_sgs)
935 			return -EINVAL;
936 
937 		pkt->dma = urb->transfer_dma;
938 		if (!pkt->dma)
939 			return -EINVAL;
940 	}
941 
942 	return 0;
943 }
944 
945 /*
946  *		for hc_driver
947  */
948 static int usbhsh_host_start(struct usb_hcd *hcd)
949 {
950 	return 0;
951 }
952 
953 static void usbhsh_host_stop(struct usb_hcd *hcd)
954 {
955 }
956 
957 static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
958 			      struct urb *urb,
959 			      gfp_t mem_flags)
960 {
961 	struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
962 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
963 	struct device *dev = usbhs_priv_to_dev(priv);
964 	struct usb_host_endpoint *ep = urb->ep;
965 	struct usbhsh_device *new_udev = NULL;
966 	int is_dir_in = usb_pipein(urb->pipe);
967 	int ret;
968 
969 	dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
970 
971 	if (!usbhsh_is_running(hpriv)) {
972 		ret = -EIO;
973 		dev_err(dev, "host is not running\n");
974 		goto usbhsh_urb_enqueue_error_not_linked;
975 	}
976 
977 	ret = usb_hcd_link_urb_to_ep(hcd, urb);
978 	if (ret) {
979 		dev_err(dev, "urb link failed\n");
980 		goto usbhsh_urb_enqueue_error_not_linked;
981 	}
982 
983 	/*
984 	 * attach udev if needed
985 	 * see [image of mod_host]
986 	 */
987 	if (!usbhsh_device_get(hpriv, urb)) {
988 		new_udev = usbhsh_device_attach(hpriv, urb);
989 		if (!new_udev) {
990 			ret = -EIO;
991 			dev_err(dev, "device attach failed\n");
992 			goto usbhsh_urb_enqueue_error_not_linked;
993 		}
994 	}
995 
996 	/*
997 	 * attach endpoint if needed
998 	 * see [image of mod_host]
999 	 */
1000 	if (!usbhsh_ep_to_uep(ep)) {
1001 		ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags);
1002 		if (ret < 0) {
1003 			dev_err(dev, "endpoint attach failed\n");
1004 			goto usbhsh_urb_enqueue_error_free_device;
1005 		}
1006 	}
1007 
1008 	/*
1009 	 * attach pipe to endpoint
1010 	 * see [image of mod_host]
1011 	 */
1012 	ret = usbhsh_pipe_attach(hpriv, urb);
1013 	if (ret < 0) {
1014 		dev_err(dev, "pipe attach failed\n");
1015 		goto usbhsh_urb_enqueue_error_free_endpoint;
1016 	}
1017 
1018 	/*
1019 	 * push packet
1020 	 */
1021 	if (usb_pipecontrol(urb->pipe))
1022 		ret = usbhsh_dcp_queue_push(hcd, urb, mem_flags);
1023 	else
1024 		ret = usbhsh_queue_push(hcd, urb, mem_flags);
1025 
1026 	return ret;
1027 
1028 usbhsh_urb_enqueue_error_free_endpoint:
1029 	usbhsh_endpoint_detach(hpriv, ep);
1030 usbhsh_urb_enqueue_error_free_device:
1031 	if (new_udev)
1032 		usbhsh_device_detach(hpriv, new_udev);
1033 usbhsh_urb_enqueue_error_not_linked:
1034 
1035 	dev_dbg(dev, "%s error\n", __func__);
1036 
1037 	return ret;
1038 }
1039 
1040 static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1041 {
1042 	struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1043 	struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
1044 
1045 	if (ureq) {
1046 		struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1047 		struct usbhs_pkt *pkt = &ureq->pkt;
1048 
1049 		usbhs_pkt_pop(pkt->pipe, pkt);
1050 		usbhsh_queue_done(priv, pkt);
1051 	}
1052 
1053 	return 0;
1054 }
1055 
1056 static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
1057 				    struct usb_host_endpoint *ep)
1058 {
1059 	struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
1060 	struct usbhsh_device *udev;
1061 	struct usbhsh_hpriv *hpriv;
1062 
1063 	/*
1064 	 * this function might be called manytimes by same hcd/ep
1065 	 * in-endpoint == out-endpoint if ep == dcp.
1066 	 */
1067 	if (!uep)
1068 		return;
1069 
1070 	udev	= usbhsh_uep_to_udev(uep);
1071 	hpriv	= usbhsh_hcd_to_hpriv(hcd);
1072 
1073 	usbhsh_endpoint_detach(hpriv, ep);
1074 
1075 	/*
1076 	 * if there is no endpoint,
1077 	 * free device
1078 	 */
1079 	if (!usbhsh_device_has_endpoint(udev))
1080 		usbhsh_device_detach(hpriv, udev);
1081 }
1082 
1083 static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf)
1084 {
1085 	struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1086 	int roothub_id = 1; /* only 1 root hub */
1087 
1088 	/*
1089 	 * does port stat was changed ?
1090 	 * check USB_PORT_STAT_C_xxx << 16
1091 	 */
1092 	if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000)
1093 		*buf = (1 << roothub_id);
1094 	else
1095 		*buf = 0;
1096 
1097 	return !!(*buf);
1098 }
1099 
1100 static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv,
1101 				    u16 typeReq, u16 wValue,
1102 				    u16 wIndex, char *buf, u16 wLength)
1103 {
1104 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1105 	struct device *dev = usbhs_priv_to_dev(priv);
1106 
1107 	switch (wValue) {
1108 	case C_HUB_OVER_CURRENT:
1109 	case C_HUB_LOCAL_POWER:
1110 		dev_dbg(dev, "%s :: C_HUB_xx\n", __func__);
1111 		return 0;
1112 	}
1113 
1114 	return -EPIPE;
1115 }
1116 
1117 static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
1118 				     u16 typeReq, u16 wValue,
1119 				     u16 wIndex, char *buf, u16 wLength)
1120 {
1121 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1122 	struct device *dev = usbhs_priv_to_dev(priv);
1123 	int enable = (typeReq == SetPortFeature);
1124 	int speed, i, timeout = 128;
1125 	int roothub_id = 1; /* only 1 root hub */
1126 
1127 	/* common error */
1128 	if (wIndex > roothub_id || wLength != 0)
1129 		return -EPIPE;
1130 
1131 	/* check wValue */
1132 	switch (wValue) {
1133 	case USB_PORT_FEAT_POWER:
1134 		usbhs_vbus_ctrl(priv, enable);
1135 		dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__);
1136 		break;
1137 
1138 	case USB_PORT_FEAT_ENABLE:
1139 	case USB_PORT_FEAT_SUSPEND:
1140 	case USB_PORT_FEAT_C_ENABLE:
1141 	case USB_PORT_FEAT_C_SUSPEND:
1142 	case USB_PORT_FEAT_C_CONNECTION:
1143 	case USB_PORT_FEAT_C_OVER_CURRENT:
1144 	case USB_PORT_FEAT_C_RESET:
1145 		dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__);
1146 		break;
1147 
1148 	case USB_PORT_FEAT_RESET:
1149 		if (!enable)
1150 			break;
1151 
1152 		usbhsh_port_stat_clear(hpriv,
1153 				       USB_PORT_STAT_HIGH_SPEED |
1154 				       USB_PORT_STAT_LOW_SPEED);
1155 
1156 		usbhsh_queue_force_pop_all(priv);
1157 
1158 		usbhs_bus_send_reset(priv);
1159 		msleep(20);
1160 		usbhs_bus_send_sof_enable(priv);
1161 
1162 		for (i = 0; i < timeout ; i++) {
1163 			switch (usbhs_bus_get_speed(priv)) {
1164 			case USB_SPEED_LOW:
1165 				speed = USB_PORT_STAT_LOW_SPEED;
1166 				goto got_usb_bus_speed;
1167 			case USB_SPEED_HIGH:
1168 				speed = USB_PORT_STAT_HIGH_SPEED;
1169 				goto got_usb_bus_speed;
1170 			case USB_SPEED_FULL:
1171 				speed = 0;
1172 				goto got_usb_bus_speed;
1173 			}
1174 
1175 			msleep(20);
1176 		}
1177 		return -EPIPE;
1178 
1179 got_usb_bus_speed:
1180 		usbhsh_port_stat_set(hpriv, speed);
1181 		usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE);
1182 
1183 		dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n",
1184 			__func__, speed);
1185 
1186 		/* status change is not needed */
1187 		return 0;
1188 
1189 	default:
1190 		return -EPIPE;
1191 	}
1192 
1193 	/* set/clear status */
1194 	if (enable)
1195 		usbhsh_port_stat_set(hpriv, (1 << wValue));
1196 	else
1197 		usbhsh_port_stat_clear(hpriv, (1 << wValue));
1198 
1199 	return 0;
1200 }
1201 
1202 static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv,
1203 				   u16 typeReq, u16 wValue,
1204 				   u16 wIndex, char *buf, u16 wLength)
1205 {
1206 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1207 	struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
1208 	struct device *dev = usbhs_priv_to_dev(priv);
1209 	int roothub_id = 1; /* only 1 root hub */
1210 
1211 	switch (typeReq) {
1212 	case GetHubStatus:
1213 		dev_dbg(dev, "%s :: GetHubStatus\n", __func__);
1214 
1215 		*buf = 0x00;
1216 		break;
1217 
1218 	case GetPortStatus:
1219 		if (wIndex != roothub_id)
1220 			return -EPIPE;
1221 
1222 		dev_dbg(dev, "%s :: GetPortStatus\n", __func__);
1223 		*(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv));
1224 		break;
1225 
1226 	case GetHubDescriptor:
1227 		desc->bDescriptorType		= USB_DT_HUB;
1228 		desc->bHubContrCurrent		= 0;
1229 		desc->bNbrPorts			= roothub_id;
1230 		desc->bDescLength		= 9;
1231 		desc->bPwrOn2PwrGood		= 0;
1232 		desc->wHubCharacteristics	=
1233 			cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_NO_OCPM);
1234 		desc->u.hs.DeviceRemovable[0]	= (roothub_id << 1);
1235 		desc->u.hs.DeviceRemovable[1]	= ~0;
1236 		dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__);
1237 		break;
1238 	}
1239 
1240 	return 0;
1241 }
1242 
1243 static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
1244 			      u16 wIndex, char *buf, u16 wLength)
1245 {
1246 	struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1247 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1248 	struct device *dev = usbhs_priv_to_dev(priv);
1249 	int ret = -EPIPE;
1250 
1251 	switch (typeReq) {
1252 
1253 	/* Hub Feature */
1254 	case ClearHubFeature:
1255 	case SetHubFeature:
1256 		ret = __usbhsh_hub_hub_feature(hpriv, typeReq,
1257 					       wValue, wIndex, buf, wLength);
1258 		break;
1259 
1260 	/* Port Feature */
1261 	case SetPortFeature:
1262 	case ClearPortFeature:
1263 		ret = __usbhsh_hub_port_feature(hpriv, typeReq,
1264 						wValue, wIndex, buf, wLength);
1265 		break;
1266 
1267 	/* Get status */
1268 	case GetHubStatus:
1269 	case GetPortStatus:
1270 	case GetHubDescriptor:
1271 		ret = __usbhsh_hub_get_status(hpriv, typeReq,
1272 					      wValue, wIndex, buf, wLength);
1273 		break;
1274 	}
1275 
1276 	dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n",
1277 		typeReq, ret, usbhsh_port_stat_get(hpriv));
1278 
1279 	return ret;
1280 }
1281 
1282 static int usbhsh_bus_nop(struct usb_hcd *hcd)
1283 {
1284 	/* nothing to do */
1285 	return 0;
1286 }
1287 
1288 static struct hc_driver usbhsh_driver = {
1289 	.description =		usbhsh_hcd_name,
1290 	.hcd_priv_size =	sizeof(struct usbhsh_hpriv),
1291 
1292 	/*
1293 	 * generic hardware linkage
1294 	 */
1295 	.flags =		HCD_USB2,
1296 
1297 	.start =		usbhsh_host_start,
1298 	.stop =			usbhsh_host_stop,
1299 
1300 	/*
1301 	 * managing i/o requests and associated device resources
1302 	 */
1303 	.urb_enqueue =		usbhsh_urb_enqueue,
1304 	.urb_dequeue =		usbhsh_urb_dequeue,
1305 	.endpoint_disable =	usbhsh_endpoint_disable,
1306 
1307 	/*
1308 	 * root hub
1309 	 */
1310 	.hub_status_data =	usbhsh_hub_status_data,
1311 	.hub_control =		usbhsh_hub_control,
1312 	.bus_suspend =		usbhsh_bus_nop,
1313 	.bus_resume =		usbhsh_bus_nop,
1314 };
1315 
1316 /*
1317  *		interrupt functions
1318  */
1319 static int usbhsh_irq_attch(struct usbhs_priv *priv,
1320 			    struct usbhs_irq_state *irq_state)
1321 {
1322 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1323 	struct device *dev = usbhs_priv_to_dev(priv);
1324 
1325 	dev_dbg(dev, "device attached\n");
1326 
1327 	usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
1328 	usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1329 
1330 	/*
1331 	 * attch interrupt might happen infinitely on some device
1332 	 * (on self power USB hub ?)
1333 	 * disable it here.
1334 	 *
1335 	 * usbhsh_is_running() becomes effective
1336 	 * according to this process.
1337 	 * see
1338 	 *	usbhsh_is_running()
1339 	 *	usbhsh_urb_enqueue()
1340 	 */
1341 	hpriv->mod.irq_attch = NULL;
1342 	usbhs_irq_callback_update(priv, &hpriv->mod);
1343 
1344 	return 0;
1345 }
1346 
1347 static int usbhsh_irq_dtch(struct usbhs_priv *priv,
1348 			   struct usbhs_irq_state *irq_state)
1349 {
1350 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1351 	struct device *dev = usbhs_priv_to_dev(priv);
1352 
1353 	dev_dbg(dev, "device detached\n");
1354 
1355 	usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
1356 	usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1357 
1358 	/*
1359 	 * enable attch interrupt again
1360 	 *
1361 	 * usbhsh_is_running() becomes invalid
1362 	 * according to this process.
1363 	 * see
1364 	 *	usbhsh_is_running()
1365 	 *	usbhsh_urb_enqueue()
1366 	 */
1367 	hpriv->mod.irq_attch = usbhsh_irq_attch;
1368 	usbhs_irq_callback_update(priv, &hpriv->mod);
1369 
1370 	/*
1371 	 * usbhsh_queue_force_pop_all() should be called
1372 	 * after usbhsh_is_running() becomes invalid.
1373 	 */
1374 	usbhsh_queue_force_pop_all(priv);
1375 
1376 	return 0;
1377 }
1378 
1379 static int usbhsh_irq_setup_ack(struct usbhs_priv *priv,
1380 				struct usbhs_irq_state *irq_state)
1381 {
1382 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1383 	struct device *dev = usbhs_priv_to_dev(priv);
1384 
1385 	dev_dbg(dev, "setup packet OK\n");
1386 
1387 	complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1388 
1389 	return 0;
1390 }
1391 
1392 static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
1393 				struct usbhs_irq_state *irq_state)
1394 {
1395 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1396 	struct device *dev = usbhs_priv_to_dev(priv);
1397 
1398 	dev_dbg(dev, "setup packet Err\n");
1399 
1400 	complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1401 
1402 	return 0;
1403 }
1404 
1405 /*
1406  *		module start/stop
1407  */
1408 static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
1409 {
1410 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1411 	struct usbhs_pipe *pipe;
1412 	struct renesas_usbhs_driver_pipe_config *pipe_configs =
1413 					usbhs_get_dparam(priv, pipe_configs);
1414 	int pipe_size = usbhs_get_dparam(priv, pipe_size);
1415 	int old_type, dir_in, i;
1416 
1417 	/* init all pipe */
1418 	old_type = USB_ENDPOINT_XFER_CONTROL;
1419 	for (i = 0; i < pipe_size; i++) {
1420 
1421 		/*
1422 		 * data "output" will be finished as soon as possible,
1423 		 * but there is no guaranty at data "input" case.
1424 		 *
1425 		 * "input" needs "standby" pipe.
1426 		 * So, "input" direction pipe > "output" direction pipe
1427 		 * is good idea.
1428 		 *
1429 		 * 1st USB_ENDPOINT_XFER_xxx will be output direction,
1430 		 * and the other will be input direction here.
1431 		 *
1432 		 * ex)
1433 		 * ...
1434 		 * USB_ENDPOINT_XFER_ISOC -> dir out
1435 		 * USB_ENDPOINT_XFER_ISOC -> dir in
1436 		 * USB_ENDPOINT_XFER_BULK -> dir out
1437 		 * USB_ENDPOINT_XFER_BULK -> dir in
1438 		 * USB_ENDPOINT_XFER_BULK -> dir in
1439 		 * ...
1440 		 */
1441 		dir_in = (pipe_configs[i].type == old_type);
1442 		old_type = pipe_configs[i].type;
1443 
1444 		if (USB_ENDPOINT_XFER_CONTROL == pipe_configs[i].type) {
1445 			pipe = usbhs_dcp_malloc(priv);
1446 			usbhsh_hpriv_to_dcp(hpriv) = pipe;
1447 		} else {
1448 			pipe = usbhs_pipe_malloc(priv,
1449 						 pipe_configs[i].type,
1450 						 dir_in);
1451 		}
1452 
1453 		pipe->mod_private = NULL;
1454 	}
1455 }
1456 
1457 static int usbhsh_start(struct usbhs_priv *priv)
1458 {
1459 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1460 	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1461 	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1462 	struct device *dev = usbhs_priv_to_dev(priv);
1463 	int ret;
1464 
1465 	/* add hcd */
1466 	ret = usb_add_hcd(hcd, 0, 0);
1467 	if (ret < 0)
1468 		return 0;
1469 	device_wakeup_enable(hcd->self.controller);
1470 
1471 	/*
1472 	 * pipe initialize and enable DCP
1473 	 */
1474 	usbhs_fifo_init(priv);
1475 	usbhs_pipe_init(priv,
1476 			usbhsh_dma_map_ctrl);
1477 	usbhsh_pipe_init_for_host(priv);
1478 
1479 	/*
1480 	 * system config enble
1481 	 * - HI speed
1482 	 * - host
1483 	 * - usb module
1484 	 */
1485 	usbhs_sys_host_ctrl(priv, 1);
1486 
1487 	/*
1488 	 * enable irq callback
1489 	 */
1490 	mod->irq_attch		= usbhsh_irq_attch;
1491 	mod->irq_dtch		= usbhsh_irq_dtch;
1492 	mod->irq_sack		= usbhsh_irq_setup_ack;
1493 	mod->irq_sign		= usbhsh_irq_setup_err;
1494 	usbhs_irq_callback_update(priv, mod);
1495 
1496 	dev_dbg(dev, "start host\n");
1497 
1498 	return ret;
1499 }
1500 
1501 static int usbhsh_stop(struct usbhs_priv *priv)
1502 {
1503 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1504 	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1505 	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1506 	struct device *dev = usbhs_priv_to_dev(priv);
1507 
1508 	/*
1509 	 * disable irq callback
1510 	 */
1511 	mod->irq_attch	= NULL;
1512 	mod->irq_dtch	= NULL;
1513 	mod->irq_sack	= NULL;
1514 	mod->irq_sign	= NULL;
1515 	usbhs_irq_callback_update(priv, mod);
1516 
1517 	usb_remove_hcd(hcd);
1518 
1519 	/* disable sys */
1520 	usbhs_sys_host_ctrl(priv, 0);
1521 
1522 	dev_dbg(dev, "quit host\n");
1523 
1524 	return 0;
1525 }
1526 
1527 int usbhs_mod_host_probe(struct usbhs_priv *priv)
1528 {
1529 	struct usbhsh_hpriv *hpriv;
1530 	struct usb_hcd *hcd;
1531 	struct usbhsh_device *udev;
1532 	struct device *dev = usbhs_priv_to_dev(priv);
1533 	int i;
1534 
1535 	/* initialize hcd */
1536 	hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name);
1537 	if (!hcd) {
1538 		dev_err(dev, "Failed to create hcd\n");
1539 		return -ENOMEM;
1540 	}
1541 	hcd->has_tt = 1; /* for low/full speed */
1542 
1543 	/*
1544 	 * CAUTION
1545 	 *
1546 	 * There is no guarantee that it is possible to access usb module here.
1547 	 * Don't accesses to it.
1548 	 * The accesse will be enable after "usbhsh_start"
1549 	 */
1550 
1551 	hpriv = usbhsh_hcd_to_hpriv(hcd);
1552 
1553 	/*
1554 	 * register itself
1555 	 */
1556 	usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST);
1557 
1558 	/* init hpriv */
1559 	hpriv->mod.name		= "host";
1560 	hpriv->mod.start	= usbhsh_start;
1561 	hpriv->mod.stop		= usbhsh_stop;
1562 	usbhsh_port_stat_init(hpriv);
1563 
1564 	/* init all device */
1565 	usbhsh_for_each_udev_with_dev0(udev, hpriv, i) {
1566 		udev->usbv	= NULL;
1567 		INIT_LIST_HEAD(&udev->ep_list_head);
1568 	}
1569 
1570 	dev_info(dev, "host probed\n");
1571 
1572 	return 0;
1573 }
1574 
1575 int usbhs_mod_host_remove(struct usbhs_priv *priv)
1576 {
1577 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1578 	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1579 
1580 	usb_put_hcd(hcd);
1581 
1582 	return 0;
1583 }
1584