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 */
73struct usbhsh_request {
74	struct urb		*urb;
75	struct usbhs_pkt	pkt;
76};
77
78struct usbhsh_device {
79	struct usb_device	*usbv;
80	struct list_head	ep_list_head; /* list of usbhsh_ep */
81};
82
83struct 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};
89
90#define USBHSH_DEVICE_MAX	10 /* see DEVADDn / DCPMAXP / PIPEMAXP */
91#define USBHSH_PORT_MAX		 7 /* see DEVADDn :: HUBPORT */
92struct usbhsh_hpriv {
93	struct usbhs_mod	mod;
94	struct usbhs_pipe	*dcp;
95
96	struct usbhsh_device	udev[USBHSH_DEVICE_MAX];
97
98	u32	port_stat;	/* USB_PORT_STAT_xxx */
99
100	struct completion	setup_ack_done;
101};
102
103
104static const char usbhsh_hcd_name[] = "renesas_usbhs host";
105
106/*
107 *		macro
108 */
109#define usbhsh_priv_to_hpriv(priv) \
110	container_of(usbhs_mod_get(priv, USBHS_HOST), struct usbhsh_hpriv, mod)
111
112#define __usbhsh_for_each_udev(start, pos, h, i)	\
113	for (i = start, pos = (h)->udev + i;		\
114	     i < USBHSH_DEVICE_MAX;			\
115	     i++, pos = (h)->udev + i)
116
117#define usbhsh_for_each_udev(pos, hpriv, i)	\
118	__usbhsh_for_each_udev(1, pos, hpriv, i)
119
120#define usbhsh_for_each_udev_with_dev0(pos, hpriv, i)	\
121	__usbhsh_for_each_udev(0, pos, hpriv, i)
122
123#define usbhsh_hcd_to_hpriv(h)	(struct usbhsh_hpriv *)((h)->hcd_priv)
124#define usbhsh_hcd_to_dev(h)	((h)->self.controller)
125
126#define usbhsh_hpriv_to_priv(h)	((h)->mod.priv)
127#define usbhsh_hpriv_to_dcp(h)	((h)->dcp)
128#define usbhsh_hpriv_to_hcd(h)	\
129	container_of((void *)h, struct usb_hcd, hcd_priv)
130
131#define usbhsh_ep_to_uep(u)	((u)->hcpriv)
132#define usbhsh_uep_to_pipe(u)	((u)->pipe)
133#define usbhsh_uep_to_udev(u)	((u)->udev)
134#define usbhsh_uep_to_ep(u)	((u)->ep)
135
136#define usbhsh_urb_to_ureq(u)	((u)->hcpriv)
137#define usbhsh_urb_to_usbv(u)	((u)->dev)
138
139#define usbhsh_usbv_to_udev(d)	dev_get_drvdata(&(d)->dev)
140
141#define usbhsh_udev_to_usbv(h)	((h)->usbv)
142#define usbhsh_udev_is_used(h)	usbhsh_udev_to_usbv(h)
143
144#define usbhsh_pipe_to_uep(p)	((p)->mod_private)
145
146#define usbhsh_device_parent(d)		(usbhsh_usbv_to_udev((d)->usbv->parent))
147#define usbhsh_device_hubport(d)	((d)->usbv->portnum)
148#define usbhsh_device_number(h, d)	((int)((d) - (h)->udev))
149#define usbhsh_device_nth(h, d)		((h)->udev + d)
150#define usbhsh_device0(h)		usbhsh_device_nth(h, 0)
151
152#define usbhsh_port_stat_init(h)	((h)->port_stat = 0)
153#define usbhsh_port_stat_set(h, s)	((h)->port_stat |= (s))
154#define usbhsh_port_stat_clear(h, s)	((h)->port_stat &= ~(s))
155#define usbhsh_port_stat_get(h)		((h)->port_stat)
156
157#define usbhsh_pkt_to_ureq(p)	\
158	container_of((void *)p, struct usbhsh_request, pkt)
159
160/*
161 *		req alloc/free
162 */
163static struct usbhsh_request *usbhsh_ureq_alloc(struct usbhsh_hpriv *hpriv,
164					       struct urb *urb,
165					       gfp_t mem_flags)
166{
167	struct usbhsh_request *ureq;
168	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
169	struct device *dev = usbhs_priv_to_dev(priv);
170
171	ureq = kzalloc(sizeof(struct usbhsh_request), mem_flags);
172	if (!ureq) {
173		dev_err(dev, "ureq alloc fail\n");
174		return NULL;
175	}
176
177	usbhs_pkt_init(&ureq->pkt);
178	ureq->urb = urb;
179	usbhsh_urb_to_ureq(urb) = ureq;
180
181	return ureq;
182}
183
184static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv,
185			    struct usbhsh_request *ureq)
186{
187	usbhsh_urb_to_ureq(ureq->urb) = NULL;
188	ureq->urb = NULL;
189
190	kfree(ureq);
191}
192
193/*
194 *		status
195 */
196static int usbhsh_is_running(struct usbhsh_hpriv *hpriv)
197{
198	/*
199	 * we can decide some device is attached or not
200	 * by checking mod.irq_attch
201	 * see
202	 *	usbhsh_irq_attch()
203	 *	usbhsh_irq_dtch()
204	 */
205	return (hpriv->mod.irq_attch == NULL);
206}
207
208/*
209 *		pipe control
210 */
211static void usbhsh_endpoint_sequence_save(struct usbhsh_hpriv *hpriv,
212					  struct urb *urb,
213					  struct usbhs_pkt *pkt)
214{
215	int len = urb->actual_length;
216	int maxp = usb_endpoint_maxp(&urb->ep->desc);
217	int t = 0;
218
219	/* DCP is out of sequence control */
220	if (usb_pipecontrol(urb->pipe))
221		return;
222
223	/*
224	 * renesas_usbhs pipe has a limitation in a number.
225	 * So, driver should re-use the limited pipe for each device/endpoint.
226	 * DATA0/1 sequence should be saved for it.
227	 * see [image of mod_host]
228	 *     [HARDWARE LIMITATION]
229	 */
230
231	/*
232	 * next sequence depends on actual_length
233	 *
234	 * ex) actual_length = 1147, maxp = 512
235	 * data0 : 512
236	 * data1 : 512
237	 * data0 : 123
238	 * data1 is the next sequence
239	 */
240	t = len / maxp;
241	if (len % maxp)
242		t++;
243	if (pkt->zero)
244		t++;
245	t %= 2;
246
247	if (t)
248		usb_dotoggle(urb->dev,
249			     usb_pipeendpoint(urb->pipe),
250			     usb_pipeout(urb->pipe));
251}
252
253static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
254					       struct urb *urb);
255
256static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv,
257			      struct urb *urb)
258{
259	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
260	struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
261	struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
262	struct usbhs_pipe *pipe;
263	struct usb_endpoint_descriptor *desc = &urb->ep->desc;
264	struct device *dev = usbhs_priv_to_dev(priv);
265	unsigned long flags;
266	int dir_in_req = !!usb_pipein(urb->pipe);
267	int is_dcp = usb_endpoint_xfer_control(desc);
268	int i, dir_in;
269	int ret = -EBUSY;
270
271	/********************  spin lock ********************/
272	usbhs_lock(priv, flags);
273
274	if (unlikely(usbhsh_uep_to_pipe(uep))) {
275		dev_err(dev, "uep already has pipe\n");
276		goto usbhsh_pipe_attach_done;
277	}
278
279	usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
280
281		/* check pipe type */
282		if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc)))
283			continue;
284
285		/* check pipe direction if normal pipe */
286		if (!is_dcp) {
287			dir_in = !!usbhs_pipe_is_dir_in(pipe);
288			if (0 != (dir_in - dir_in_req))
289				continue;
290		}
291
292		/* check pipe is free */
293		if (usbhsh_pipe_to_uep(pipe))
294			continue;
295
296		/*
297		 * attach pipe to uep
298		 *
299		 * usbhs_pipe_config_update() should be called after
300		 * usbhs_set_device_config()
301		 * see
302		 *  DCPMAXP/PIPEMAXP
303		 */
304		usbhsh_uep_to_pipe(uep)		= pipe;
305		usbhsh_pipe_to_uep(pipe)	= uep;
306
307		usbhs_pipe_config_update(pipe,
308					 usbhsh_device_number(hpriv, udev),
309					 usb_endpoint_num(desc),
310					 usb_endpoint_maxp(desc));
311
312		dev_dbg(dev, "%s [%d-%d(%s:%s)]\n", __func__,
313			usbhsh_device_number(hpriv, udev),
314			usb_endpoint_num(desc),
315			usbhs_pipe_name(pipe),
316			dir_in_req ? "in" : "out");
317
318		ret = 0;
319		break;
320	}
321
322usbhsh_pipe_attach_done:
323	usbhs_unlock(priv, flags);
324	/********************  spin unlock ******************/
325
326	return ret;
327}
328
329static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv,
330			       struct usbhsh_ep *uep)
331{
332	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
333	struct usbhs_pipe *pipe;
334	struct device *dev = usbhs_priv_to_dev(priv);
335	unsigned long flags;
336
337	/********************  spin lock ********************/
338	usbhs_lock(priv, flags);
339
340	pipe = usbhsh_uep_to_pipe(uep);
341
342	if (unlikely(!pipe)) {
343		dev_err(dev, "uep doens't have pipe\n");
344	} else {
345		struct usb_host_endpoint *ep = usbhsh_uep_to_ep(uep);
346		struct usbhsh_device *udev = usbhsh_uep_to_udev(uep);
347
348		/* detach pipe from uep */
349		usbhsh_uep_to_pipe(uep)		= NULL;
350		usbhsh_pipe_to_uep(pipe)	= NULL;
351
352		dev_dbg(dev, "%s [%d-%d(%s)]\n", __func__,
353			usbhsh_device_number(hpriv, udev),
354			usb_endpoint_num(&ep->desc),
355			usbhs_pipe_name(pipe));
356	}
357
358	usbhs_unlock(priv, flags);
359	/********************  spin unlock ******************/
360}
361
362/*
363 *		endpoint control
364 */
365static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv,
366				  struct urb *urb,
367				  gfp_t mem_flags)
368{
369	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
370	struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
371	struct usb_host_endpoint *ep = urb->ep;
372	struct usbhsh_ep *uep;
373	struct device *dev = usbhs_priv_to_dev(priv);
374	struct usb_endpoint_descriptor *desc = &ep->desc;
375	unsigned long flags;
376
377	uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags);
378	if (!uep) {
379		dev_err(dev, "usbhsh_ep alloc fail\n");
380		return -ENOMEM;
381	}
382
383	/********************  spin lock ********************/
384	usbhs_lock(priv, flags);
385
386	/*
387	 * init endpoint
388	 */
389	INIT_LIST_HEAD(&uep->ep_list);
390	list_add_tail(&uep->ep_list, &udev->ep_list_head);
391
392	usbhsh_uep_to_udev(uep)	= udev;
393	usbhsh_uep_to_ep(uep)	= ep;
394	usbhsh_ep_to_uep(ep)	= uep;
395
396	usbhs_unlock(priv, flags);
397	/********************  spin unlock ******************/
398
399	dev_dbg(dev, "%s [%d-%d]\n", __func__,
400		usbhsh_device_number(hpriv, udev),
401		usb_endpoint_num(desc));
402
403	return 0;
404}
405
406static void usbhsh_endpoint_detach(struct usbhsh_hpriv *hpriv,
407				   struct usb_host_endpoint *ep)
408{
409	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
410	struct device *dev = usbhs_priv_to_dev(priv);
411	struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
412	unsigned long flags;
413
414	if (!uep)
415		return;
416
417	dev_dbg(dev, "%s [%d-%d]\n", __func__,
418		usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)),
419		usb_endpoint_num(&ep->desc));
420
421	if (usbhsh_uep_to_pipe(uep))
422		usbhsh_pipe_detach(hpriv, uep);
423
424	/********************  spin lock ********************/
425	usbhs_lock(priv, flags);
426
427	/* remove this endpoint from udev */
428	list_del_init(&uep->ep_list);
429
430	usbhsh_uep_to_udev(uep)	= NULL;
431	usbhsh_uep_to_ep(uep)	= NULL;
432	usbhsh_ep_to_uep(ep)	= NULL;
433
434	usbhs_unlock(priv, flags);
435	/********************  spin unlock ******************/
436
437	kfree(uep);
438}
439
440static void usbhsh_endpoint_detach_all(struct usbhsh_hpriv *hpriv,
441				       struct usbhsh_device *udev)
442{
443	struct usbhsh_ep *uep, *next;
444
445	list_for_each_entry_safe(uep, next, &udev->ep_list_head, ep_list)
446		usbhsh_endpoint_detach(hpriv, usbhsh_uep_to_ep(uep));
447}
448
449/*
450 *		device control
451 */
452static int usbhsh_connected_to_rhdev(struct usb_hcd *hcd,
453				     struct usbhsh_device *udev)
454{
455	struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
456
457	return hcd->self.root_hub == usbv->parent;
458}
459
460static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
461{
462	return !list_empty(&udev->ep_list_head);
463}
464
465static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
466					       struct urb *urb)
467{
468	struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
469	struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
470
471	/* usbhsh_device_attach() is still not called */
472	if (!udev)
473		return NULL;
474
475	/* if it is device0, return it */
476	if (0 == usb_pipedevice(urb->pipe))
477		return usbhsh_device0(hpriv);
478
479	/* return attached device */
480	return udev;
481}
482
483static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv,
484						 struct urb *urb)
485{
486	struct usbhsh_device *udev = NULL;
487	struct usbhsh_device *udev0 = usbhsh_device0(hpriv);
488	struct usbhsh_device *pos;
489	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
490	struct device *dev = usbhsh_hcd_to_dev(hcd);
491	struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
492	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
493	unsigned long flags;
494	u16 upphub, hubport;
495	int i;
496
497	/*
498	 * This function should be called only while urb is pointing to device0.
499	 * It will attach unused usbhsh_device to urb (usbv),
500	 * and initialize device0.
501	 * You can use usbhsh_device_get() to get "current" udev,
502	 * and usbhsh_usbv_to_udev() is for "attached" udev.
503	 */
504	if (0 != usb_pipedevice(urb->pipe)) {
505		dev_err(dev, "%s fail: urb isn't pointing device0\n", __func__);
506		return NULL;
507	}
508
509	/********************  spin lock ********************/
510	usbhs_lock(priv, flags);
511
512	/*
513	 * find unused device
514	 */
515	usbhsh_for_each_udev(pos, hpriv, i) {
516		if (usbhsh_udev_is_used(pos))
517			continue;
518		udev = pos;
519		break;
520	}
521
522	if (udev) {
523		/*
524		 * usbhsh_usbv_to_udev()
525		 * usbhsh_udev_to_usbv()
526		 * will be enable
527		 */
528		dev_set_drvdata(&usbv->dev, udev);
529		udev->usbv = usbv;
530	}
531
532	usbhs_unlock(priv, flags);
533	/********************  spin unlock ******************/
534
535	if (!udev) {
536		dev_err(dev, "no free usbhsh_device\n");
537		return NULL;
538	}
539
540	if (usbhsh_device_has_endpoint(udev)) {
541		dev_warn(dev, "udev have old endpoint\n");
542		usbhsh_endpoint_detach_all(hpriv, udev);
543	}
544
545	if (usbhsh_device_has_endpoint(udev0)) {
546		dev_warn(dev, "udev0 have old endpoint\n");
547		usbhsh_endpoint_detach_all(hpriv, udev0);
548	}
549
550	/* uep will be attached */
551	INIT_LIST_HEAD(&udev0->ep_list_head);
552	INIT_LIST_HEAD(&udev->ep_list_head);
553
554	/*
555	 * set device0 config
556	 */
557	usbhs_set_device_config(priv,
558				0, 0, 0, usbv->speed);
559
560	/*
561	 * set new device config
562	 */
563	upphub	= 0;
564	hubport	= 0;
565	if (!usbhsh_connected_to_rhdev(hcd, udev)) {
566		/* if udev is not connected to rhdev, it means parent is Hub */
567		struct usbhsh_device *parent = usbhsh_device_parent(udev);
568
569		upphub	= usbhsh_device_number(hpriv, parent);
570		hubport	= usbhsh_device_hubport(udev);
571
572		dev_dbg(dev, "%s connecte to Hub [%d:%d](%p)\n", __func__,
573			upphub, hubport, parent);
574	}
575
576	usbhs_set_device_config(priv,
577			       usbhsh_device_number(hpriv, udev),
578			       upphub, hubport, usbv->speed);
579
580	dev_dbg(dev, "%s [%d](%p)\n", __func__,
581		usbhsh_device_number(hpriv, udev), udev);
582
583	return udev;
584}
585
586static void usbhsh_device_detach(struct usbhsh_hpriv *hpriv,
587			       struct usbhsh_device *udev)
588{
589	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
590	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
591	struct device *dev = usbhsh_hcd_to_dev(hcd);
592	struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
593	unsigned long flags;
594
595	dev_dbg(dev, "%s [%d](%p)\n", __func__,
596		usbhsh_device_number(hpriv, udev), udev);
597
598	if (usbhsh_device_has_endpoint(udev)) {
599		dev_warn(dev, "udev still have endpoint\n");
600		usbhsh_endpoint_detach_all(hpriv, udev);
601	}
602
603	/*
604	 * There is nothing to do if it is device0.
605	 * see
606	 *  usbhsh_device_attach()
607	 *  usbhsh_device_get()
608	 */
609	if (0 == usbhsh_device_number(hpriv, udev))
610		return;
611
612	/********************  spin lock ********************/
613	usbhs_lock(priv, flags);
614
615	/*
616	 * usbhsh_usbv_to_udev()
617	 * usbhsh_udev_to_usbv()
618	 * will be disable
619	 */
620	dev_set_drvdata(&usbv->dev, NULL);
621	udev->usbv = NULL;
622
623	usbhs_unlock(priv, flags);
624	/********************  spin unlock ******************/
625}
626
627/*
628 *		queue push/pop
629 */
630static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
631{
632	struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
633	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
634	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
635	struct urb *urb = ureq->urb;
636	struct device *dev = usbhs_priv_to_dev(priv);
637	int status = 0;
638
639	dev_dbg(dev, "%s\n", __func__);
640
641	if (!urb) {
642		dev_warn(dev, "pkt doesn't have urb\n");
643		return;
644	}
645
646	if (!usbhsh_is_running(hpriv))
647		status = -ESHUTDOWN;
648
649	urb->actual_length = pkt->actual;
650	usbhsh_ureq_free(hpriv, ureq);
651
652	usbhsh_endpoint_sequence_save(hpriv, urb, pkt);
653	usbhsh_pipe_detach(hpriv, usbhsh_ep_to_uep(urb->ep));
654
655	usb_hcd_unlink_urb_from_ep(hcd, urb);
656	usb_hcd_giveback_urb(hcd, urb, status);
657}
658
659static int usbhsh_queue_push(struct usb_hcd *hcd,
660			     struct urb *urb,
661			     gfp_t mem_flags)
662{
663	struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
664	struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
665	struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
666	struct device *dev = usbhsh_hcd_to_dev(hcd);
667	struct usbhsh_request *ureq;
668	void *buf;
669	int len, sequence;
670
671	if (usb_pipeisoc(urb->pipe)) {
672		dev_err(dev, "pipe iso is not supported now\n");
673		return -EIO;
674	}
675
676	/* this ureq will be freed on usbhsh_queue_done() */
677	ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
678	if (unlikely(!ureq)) {
679		dev_err(dev, "ureq alloc fail\n");
680		return -ENOMEM;
681	}
682
683	if (usb_pipein(urb->pipe))
684		pipe->handler = &usbhs_fifo_pio_pop_handler;
685	else
686		pipe->handler = &usbhs_fifo_pio_push_handler;
687
688	buf = (void *)(urb->transfer_buffer + urb->actual_length);
689	len = urb->transfer_buffer_length - urb->actual_length;
690
691	sequence = usb_gettoggle(urb->dev,
692				 usb_pipeendpoint(urb->pipe),
693				 usb_pipeout(urb->pipe));
694
695	dev_dbg(dev, "%s\n", __func__);
696	usbhs_pkt_push(pipe, &ureq->pkt, usbhsh_queue_done,
697		       buf, len, (urb->transfer_flags & URB_ZERO_PACKET),
698		       sequence);
699
700	usbhs_pkt_start(pipe);
701
702	return 0;
703}
704
705static void usbhsh_queue_force_pop(struct usbhs_priv *priv,
706				   struct usbhs_pipe *pipe)
707{
708	struct usbhs_pkt *pkt;
709
710	while (1) {
711		pkt = usbhs_pkt_pop(pipe, NULL);
712		if (!pkt)
713			break;
714
715		/*
716		 * if all packet are gone, usbhsh_endpoint_disable()
717		 * will be called.
718		 * then, attached device/endpoint/pipe will be detached
719		 */
720		usbhsh_queue_done(priv, pkt);
721	}
722}
723
724static void usbhsh_queue_force_pop_all(struct usbhs_priv *priv)
725{
726	struct usbhs_pipe *pos;
727	int i;
728
729	usbhs_for_each_pipe_with_dcp(pos, priv, i)
730		usbhsh_queue_force_pop(priv, pos);
731}
732
733/*
734 *		DCP setup stage
735 */
736static int usbhsh_is_request_address(struct urb *urb)
737{
738	struct usb_ctrlrequest *req;
739
740	req = (struct usb_ctrlrequest *)urb->setup_packet;
741
742	if ((DeviceOutRequest    == req->bRequestType << 8) &&
743	    (USB_REQ_SET_ADDRESS == req->bRequest))
744		return 1;
745	else
746		return 0;
747}
748
749static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv,
750					   struct urb *urb,
751					   struct usbhs_pipe *pipe)
752{
753	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
754	struct usb_ctrlrequest req;
755	struct device *dev = usbhs_priv_to_dev(priv);
756
757	/*
758	 * wait setup packet ACK
759	 * see
760	 *	usbhsh_irq_setup_ack()
761	 *	usbhsh_irq_setup_err()
762	 */
763	init_completion(&hpriv->setup_ack_done);
764
765	/* copy original request */
766	memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest));
767
768	/*
769	 * renesas_usbhs can not use original usb address.
770	 * see HARDWARE LIMITATION.
771	 * modify usb address here to use attached device.
772	 * see usbhsh_device_attach()
773	 */
774	if (usbhsh_is_request_address(urb)) {
775		struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
776		struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
777
778		/* udev is a attached device */
779		req.wValue = usbhsh_device_number(hpriv, udev);
780		dev_dbg(dev, "create new address - %d\n", req.wValue);
781	}
782
783	/* set request */
784	usbhs_usbreq_set_val(priv, &req);
785
786	/*
787	 * wait setup packet ACK
788	 */
789	wait_for_completion(&hpriv->setup_ack_done);
790
791	dev_dbg(dev, "%s done\n", __func__);
792}
793
794/*
795 *		DCP data stage
796 */
797static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv,
798					  struct usbhs_pkt *pkt)
799{
800	struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
801	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
802
803	/* this ureq was connected to urb when usbhsh_urb_enqueue()  */
804
805	usbhsh_ureq_free(hpriv, ureq);
806}
807
808static int usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv,
809					 struct urb *urb,
810					 struct usbhs_pipe *pipe,
811					 gfp_t mem_flags)
812
813{
814	struct usbhsh_request *ureq;
815
816	/* this ureq will be freed on usbhsh_data_stage_packet_done() */
817	ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
818	if (unlikely(!ureq))
819		return -ENOMEM;
820
821	if (usb_pipein(urb->pipe))
822		pipe->handler = &usbhs_dcp_data_stage_in_handler;
823	else
824		pipe->handler = &usbhs_dcp_data_stage_out_handler;
825
826	usbhs_pkt_push(pipe, &ureq->pkt,
827		       usbhsh_data_stage_packet_done,
828		       urb->transfer_buffer,
829		       urb->transfer_buffer_length,
830		       (urb->transfer_flags & URB_ZERO_PACKET),
831		       -1);
832
833	return 0;
834}
835
836/*
837 *		DCP status stage
838 */
839static int usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv,
840					    struct urb *urb,
841					    struct usbhs_pipe *pipe,
842					    gfp_t mem_flags)
843{
844	struct usbhsh_request *ureq;
845
846	/* This ureq will be freed on usbhsh_queue_done() */
847	ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
848	if (unlikely(!ureq))
849		return -ENOMEM;
850
851	if (usb_pipein(urb->pipe))
852		pipe->handler = &usbhs_dcp_status_stage_in_handler;
853	else
854		pipe->handler = &usbhs_dcp_status_stage_out_handler;
855
856	usbhs_pkt_push(pipe, &ureq->pkt,
857		       usbhsh_queue_done,
858		       NULL,
859		       urb->transfer_buffer_length,
860		       0, -1);
861
862	return 0;
863}
864
865static int usbhsh_dcp_queue_push(struct usb_hcd *hcd,
866				 struct urb *urb,
867				 gfp_t mflags)
868{
869	struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
870	struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
871	struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
872	struct device *dev = usbhsh_hcd_to_dev(hcd);
873	int ret;
874
875	dev_dbg(dev, "%s\n", __func__);
876
877	/*
878	 * setup stage
879	 *
880	 * usbhsh_send_setup_stage_packet() wait SACK/SIGN
881	 */
882	usbhsh_setup_stage_packet_push(hpriv, urb, pipe);
883
884	/*
885	 * data stage
886	 *
887	 * It is pushed only when urb has buffer.
888	 */
889	if (urb->transfer_buffer_length) {
890		ret = usbhsh_data_stage_packet_push(hpriv, urb, pipe, mflags);
891		if (ret < 0) {
892			dev_err(dev, "data stage failed\n");
893			return ret;
894		}
895	}
896
897	/*
898	 * status stage
899	 */
900	ret = usbhsh_status_stage_packet_push(hpriv, urb, pipe, mflags);
901	if (ret < 0) {
902		dev_err(dev, "status stage failed\n");
903		return ret;
904	}
905
906	/*
907	 * start pushed packets
908	 */
909	usbhs_pkt_start(pipe);
910
911	return 0;
912}
913
914/*
915 *		dma map functions
916 */
917static int usbhsh_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
918{
919	return 0;
920}
921
922/*
923 *		for hc_driver
924 */
925static int usbhsh_host_start(struct usb_hcd *hcd)
926{
927	return 0;
928}
929
930static void usbhsh_host_stop(struct usb_hcd *hcd)
931{
932}
933
934static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
935			      struct urb *urb,
936			      gfp_t mem_flags)
937{
938	struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
939	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
940	struct device *dev = usbhs_priv_to_dev(priv);
941	struct usb_host_endpoint *ep = urb->ep;
942	struct usbhsh_device *new_udev = NULL;
943	int is_dir_in = usb_pipein(urb->pipe);
944	int i;
945	int ret;
946
947	dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
948
949	if (!usbhsh_is_running(hpriv)) {
950		ret = -EIO;
951		dev_err(dev, "host is not running\n");
952		goto usbhsh_urb_enqueue_error_not_linked;
953	}
954
955	ret = usb_hcd_link_urb_to_ep(hcd, urb);
956	if (ret) {
957		dev_err(dev, "urb link failed\n");
958		goto usbhsh_urb_enqueue_error_not_linked;
959	}
960
961	/*
962	 * attach udev if needed
963	 * see [image of mod_host]
964	 */
965	if (!usbhsh_device_get(hpriv, urb)) {
966		new_udev = usbhsh_device_attach(hpriv, urb);
967		if (!new_udev) {
968			ret = -EIO;
969			dev_err(dev, "device attach failed\n");
970			goto usbhsh_urb_enqueue_error_not_linked;
971		}
972	}
973
974	/*
975	 * attach endpoint if needed
976	 * see [image of mod_host]
977	 */
978	if (!usbhsh_ep_to_uep(ep)) {
979		ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags);
980		if (ret < 0) {
981			dev_err(dev, "endpoint attach failed\n");
982			goto usbhsh_urb_enqueue_error_free_device;
983		}
984	}
985
986	/*
987	 * attach pipe to endpoint
988	 * see [image of mod_host]
989	 */
990	for (i = 0; i < 1024; i++) {
991		ret = usbhsh_pipe_attach(hpriv, urb);
992		if (ret < 0)
993			msleep(100);
994		else
995			break;
996	}
997	if (ret < 0) {
998		dev_err(dev, "pipe attach failed\n");
999		goto usbhsh_urb_enqueue_error_free_endpoint;
1000	}
1001
1002	/*
1003	 * push packet
1004	 */
1005	if (usb_pipecontrol(urb->pipe))
1006		ret = usbhsh_dcp_queue_push(hcd, urb, mem_flags);
1007	else
1008		ret = usbhsh_queue_push(hcd, urb, mem_flags);
1009
1010	return ret;
1011
1012usbhsh_urb_enqueue_error_free_endpoint:
1013	usbhsh_endpoint_detach(hpriv, ep);
1014usbhsh_urb_enqueue_error_free_device:
1015	if (new_udev)
1016		usbhsh_device_detach(hpriv, new_udev);
1017usbhsh_urb_enqueue_error_not_linked:
1018
1019	dev_dbg(dev, "%s error\n", __func__);
1020
1021	return ret;
1022}
1023
1024static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1025{
1026	struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1027	struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
1028
1029	if (ureq) {
1030		struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1031		struct usbhs_pkt *pkt = &ureq->pkt;
1032
1033		usbhs_pkt_pop(pkt->pipe, pkt);
1034		usbhsh_queue_done(priv, pkt);
1035	}
1036
1037	return 0;
1038}
1039
1040static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
1041				    struct usb_host_endpoint *ep)
1042{
1043	struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
1044	struct usbhsh_device *udev;
1045	struct usbhsh_hpriv *hpriv;
1046
1047	/*
1048	 * this function might be called manytimes by same hcd/ep
1049	 * in-endpoint == out-endpoint if ep == dcp.
1050	 */
1051	if (!uep)
1052		return;
1053
1054	udev	= usbhsh_uep_to_udev(uep);
1055	hpriv	= usbhsh_hcd_to_hpriv(hcd);
1056
1057	usbhsh_endpoint_detach(hpriv, ep);
1058
1059	/*
1060	 * if there is no endpoint,
1061	 * free device
1062	 */
1063	if (!usbhsh_device_has_endpoint(udev))
1064		usbhsh_device_detach(hpriv, udev);
1065}
1066
1067static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf)
1068{
1069	struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1070	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1071	struct device *dev = usbhs_priv_to_dev(priv);
1072	int roothub_id = 1; /* only 1 root hub */
1073
1074	/*
1075	 * does port stat was changed ?
1076	 * check USB_PORT_STAT_C_xxx << 16
1077	 */
1078	if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000)
1079		*buf = (1 << roothub_id);
1080	else
1081		*buf = 0;
1082
1083	dev_dbg(dev, "%s (%02x)\n", __func__, *buf);
1084
1085	return !!(*buf);
1086}
1087
1088static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv,
1089				    u16 typeReq, u16 wValue,
1090				    u16 wIndex, char *buf, u16 wLength)
1091{
1092	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1093	struct device *dev = usbhs_priv_to_dev(priv);
1094
1095	switch (wValue) {
1096	case C_HUB_OVER_CURRENT:
1097	case C_HUB_LOCAL_POWER:
1098		dev_dbg(dev, "%s :: C_HUB_xx\n", __func__);
1099		return 0;
1100	}
1101
1102	return -EPIPE;
1103}
1104
1105static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
1106				     u16 typeReq, u16 wValue,
1107				     u16 wIndex, char *buf, u16 wLength)
1108{
1109	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1110	struct device *dev = usbhs_priv_to_dev(priv);
1111	int enable = (typeReq == SetPortFeature);
1112	int speed, i, timeout = 128;
1113	int roothub_id = 1; /* only 1 root hub */
1114
1115	/* common error */
1116	if (wIndex > roothub_id || wLength != 0)
1117		return -EPIPE;
1118
1119	/* check wValue */
1120	switch (wValue) {
1121	case USB_PORT_FEAT_POWER:
1122		usbhs_vbus_ctrl(priv, enable);
1123		dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__);
1124		break;
1125
1126	case USB_PORT_FEAT_ENABLE:
1127	case USB_PORT_FEAT_SUSPEND:
1128	case USB_PORT_FEAT_C_ENABLE:
1129	case USB_PORT_FEAT_C_SUSPEND:
1130	case USB_PORT_FEAT_C_CONNECTION:
1131	case USB_PORT_FEAT_C_OVER_CURRENT:
1132	case USB_PORT_FEAT_C_RESET:
1133		dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__);
1134		break;
1135
1136	case USB_PORT_FEAT_RESET:
1137		if (!enable)
1138			break;
1139
1140		usbhsh_port_stat_clear(hpriv,
1141				       USB_PORT_STAT_HIGH_SPEED |
1142				       USB_PORT_STAT_LOW_SPEED);
1143
1144		usbhsh_queue_force_pop_all(priv);
1145
1146		usbhs_bus_send_reset(priv);
1147		msleep(20);
1148		usbhs_bus_send_sof_enable(priv);
1149
1150		for (i = 0; i < timeout ; i++) {
1151			switch (usbhs_bus_get_speed(priv)) {
1152			case USB_SPEED_LOW:
1153				speed = USB_PORT_STAT_LOW_SPEED;
1154				goto got_usb_bus_speed;
1155			case USB_SPEED_HIGH:
1156				speed = USB_PORT_STAT_HIGH_SPEED;
1157				goto got_usb_bus_speed;
1158			case USB_SPEED_FULL:
1159				speed = 0;
1160				goto got_usb_bus_speed;
1161			}
1162
1163			msleep(20);
1164		}
1165		return -EPIPE;
1166
1167got_usb_bus_speed:
1168		usbhsh_port_stat_set(hpriv, speed);
1169		usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE);
1170
1171		dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n",
1172			__func__, speed);
1173
1174		/* status change is not needed */
1175		return 0;
1176
1177	default:
1178		return -EPIPE;
1179	}
1180
1181	/* set/clear status */
1182	if (enable)
1183		usbhsh_port_stat_set(hpriv, (1 << wValue));
1184	else
1185		usbhsh_port_stat_clear(hpriv, (1 << wValue));
1186
1187	return 0;
1188}
1189
1190static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv,
1191				   u16 typeReq, u16 wValue,
1192				   u16 wIndex, char *buf, u16 wLength)
1193{
1194	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1195	struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
1196	struct device *dev = usbhs_priv_to_dev(priv);
1197	int roothub_id = 1; /* only 1 root hub */
1198
1199	switch (typeReq) {
1200	case GetHubStatus:
1201		dev_dbg(dev, "%s :: GetHubStatus\n", __func__);
1202
1203		*buf = 0x00;
1204		break;
1205
1206	case GetPortStatus:
1207		if (wIndex != roothub_id)
1208			return -EPIPE;
1209
1210		dev_dbg(dev, "%s :: GetPortStatus\n", __func__);
1211		*(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv));
1212		break;
1213
1214	case GetHubDescriptor:
1215		desc->bDescriptorType		= 0x29;
1216		desc->bHubContrCurrent		= 0;
1217		desc->bNbrPorts			= roothub_id;
1218		desc->bDescLength		= 9;
1219		desc->bPwrOn2PwrGood		= 0;
1220		desc->wHubCharacteristics	= cpu_to_le16(0x0011);
1221		desc->u.hs.DeviceRemovable[0]	= (roothub_id << 1);
1222		desc->u.hs.DeviceRemovable[1]	= ~0;
1223		dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__);
1224		break;
1225	}
1226
1227	return 0;
1228}
1229
1230static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
1231			      u16 wIndex, char *buf, u16 wLength)
1232{
1233	struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1234	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1235	struct device *dev = usbhs_priv_to_dev(priv);
1236	int ret = -EPIPE;
1237
1238	switch (typeReq) {
1239
1240	/* Hub Feature */
1241	case ClearHubFeature:
1242	case SetHubFeature:
1243		ret = __usbhsh_hub_hub_feature(hpriv, typeReq,
1244					       wValue, wIndex, buf, wLength);
1245		break;
1246
1247	/* Port Feature */
1248	case SetPortFeature:
1249	case ClearPortFeature:
1250		ret = __usbhsh_hub_port_feature(hpriv, typeReq,
1251						wValue, wIndex, buf, wLength);
1252		break;
1253
1254	/* Get status */
1255	case GetHubStatus:
1256	case GetPortStatus:
1257	case GetHubDescriptor:
1258		ret = __usbhsh_hub_get_status(hpriv, typeReq,
1259					      wValue, wIndex, buf, wLength);
1260		break;
1261	}
1262
1263	dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n",
1264		typeReq, ret, usbhsh_port_stat_get(hpriv));
1265
1266	return ret;
1267}
1268
1269static struct hc_driver usbhsh_driver = {
1270	.description =		usbhsh_hcd_name,
1271	.hcd_priv_size =	sizeof(struct usbhsh_hpriv),
1272
1273	/*
1274	 * generic hardware linkage
1275	 */
1276	.flags =		HCD_USB2,
1277
1278	.start =		usbhsh_host_start,
1279	.stop =			usbhsh_host_stop,
1280
1281	/*
1282	 * managing i/o requests and associated device resources
1283	 */
1284	.urb_enqueue =		usbhsh_urb_enqueue,
1285	.urb_dequeue =		usbhsh_urb_dequeue,
1286	.endpoint_disable =	usbhsh_endpoint_disable,
1287
1288	/*
1289	 * root hub
1290	 */
1291	.hub_status_data =	usbhsh_hub_status_data,
1292	.hub_control =		usbhsh_hub_control,
1293};
1294
1295/*
1296 *		interrupt functions
1297 */
1298static int usbhsh_irq_attch(struct usbhs_priv *priv,
1299			    struct usbhs_irq_state *irq_state)
1300{
1301	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1302	struct device *dev = usbhs_priv_to_dev(priv);
1303
1304	dev_dbg(dev, "device attached\n");
1305
1306	usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
1307	usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1308
1309	/*
1310	 * attch interrupt might happen infinitely on some device
1311	 * (on self power USB hub ?)
1312	 * disable it here.
1313	 *
1314	 * usbhsh_is_running() becomes effective
1315	 * according to this process.
1316	 * see
1317	 *	usbhsh_is_running()
1318	 *	usbhsh_urb_enqueue()
1319	 */
1320	hpriv->mod.irq_attch = NULL;
1321	usbhs_irq_callback_update(priv, &hpriv->mod);
1322
1323	return 0;
1324}
1325
1326static int usbhsh_irq_dtch(struct usbhs_priv *priv,
1327			   struct usbhs_irq_state *irq_state)
1328{
1329	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1330	struct device *dev = usbhs_priv_to_dev(priv);
1331
1332	dev_dbg(dev, "device detached\n");
1333
1334	usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
1335	usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1336
1337	/*
1338	 * enable attch interrupt again
1339	 *
1340	 * usbhsh_is_running() becomes invalid
1341	 * according to this process.
1342	 * see
1343	 *	usbhsh_is_running()
1344	 *	usbhsh_urb_enqueue()
1345	 */
1346	hpriv->mod.irq_attch = usbhsh_irq_attch;
1347	usbhs_irq_callback_update(priv, &hpriv->mod);
1348
1349	/*
1350	 * usbhsh_queue_force_pop_all() should be called
1351	 * after usbhsh_is_running() becomes invalid.
1352	 */
1353	usbhsh_queue_force_pop_all(priv);
1354
1355	return 0;
1356}
1357
1358static int usbhsh_irq_setup_ack(struct usbhs_priv *priv,
1359				struct usbhs_irq_state *irq_state)
1360{
1361	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1362	struct device *dev = usbhs_priv_to_dev(priv);
1363
1364	dev_dbg(dev, "setup packet OK\n");
1365
1366	complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1367
1368	return 0;
1369}
1370
1371static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
1372				struct usbhs_irq_state *irq_state)
1373{
1374	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1375	struct device *dev = usbhs_priv_to_dev(priv);
1376
1377	dev_dbg(dev, "setup packet Err\n");
1378
1379	complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1380
1381	return 0;
1382}
1383
1384/*
1385 *		module start/stop
1386 */
1387static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
1388{
1389	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1390	struct usbhs_pipe *pipe;
1391	u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
1392	int pipe_size = usbhs_get_dparam(priv, pipe_size);
1393	int old_type, dir_in, i;
1394
1395	/* init all pipe */
1396	old_type = USB_ENDPOINT_XFER_CONTROL;
1397	for (i = 0; i < pipe_size; i++) {
1398
1399		/*
1400		 * data "output" will be finished as soon as possible,
1401		 * but there is no guaranty at data "input" case.
1402		 *
1403		 * "input" needs "standby" pipe.
1404		 * So, "input" direction pipe > "output" direction pipe
1405		 * is good idea.
1406		 *
1407		 * 1st USB_ENDPOINT_XFER_xxx will be output direction,
1408		 * and the other will be input direction here.
1409		 *
1410		 * ex)
1411		 * ...
1412		 * USB_ENDPOINT_XFER_ISOC -> dir out
1413		 * USB_ENDPOINT_XFER_ISOC -> dir in
1414		 * USB_ENDPOINT_XFER_BULK -> dir out
1415		 * USB_ENDPOINT_XFER_BULK -> dir in
1416		 * USB_ENDPOINT_XFER_BULK -> dir in
1417		 * ...
1418		 */
1419		dir_in = (pipe_type[i] == old_type);
1420		old_type = pipe_type[i];
1421
1422		if (USB_ENDPOINT_XFER_CONTROL == pipe_type[i]) {
1423			pipe = usbhs_dcp_malloc(priv);
1424			usbhsh_hpriv_to_dcp(hpriv) = pipe;
1425		} else {
1426			pipe = usbhs_pipe_malloc(priv,
1427						 pipe_type[i],
1428						 dir_in);
1429		}
1430
1431		pipe->mod_private = NULL;
1432	}
1433}
1434
1435static int usbhsh_start(struct usbhs_priv *priv)
1436{
1437	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1438	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1439	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1440	struct device *dev = usbhs_priv_to_dev(priv);
1441	int ret;
1442
1443	/* add hcd */
1444	ret = usb_add_hcd(hcd, 0, 0);
1445	if (ret < 0)
1446		return 0;
1447
1448	/*
1449	 * pipe initialize and enable DCP
1450	 */
1451	usbhs_pipe_init(priv,
1452			usbhsh_dma_map_ctrl);
1453	usbhs_fifo_init(priv);
1454	usbhsh_pipe_init_for_host(priv);
1455
1456	/*
1457	 * system config enble
1458	 * - HI speed
1459	 * - host
1460	 * - usb module
1461	 */
1462	usbhs_sys_host_ctrl(priv, 1);
1463
1464	/*
1465	 * enable irq callback
1466	 */
1467	mod->irq_attch		= usbhsh_irq_attch;
1468	mod->irq_dtch		= usbhsh_irq_dtch;
1469	mod->irq_sack		= usbhsh_irq_setup_ack;
1470	mod->irq_sign		= usbhsh_irq_setup_err;
1471	usbhs_irq_callback_update(priv, mod);
1472
1473	dev_dbg(dev, "start host\n");
1474
1475	return ret;
1476}
1477
1478static int usbhsh_stop(struct usbhs_priv *priv)
1479{
1480	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1481	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1482	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1483	struct device *dev = usbhs_priv_to_dev(priv);
1484
1485	/*
1486	 * disable irq callback
1487	 */
1488	mod->irq_attch	= NULL;
1489	mod->irq_dtch	= NULL;
1490	mod->irq_sack	= NULL;
1491	mod->irq_sign	= NULL;
1492	usbhs_irq_callback_update(priv, mod);
1493
1494	usb_remove_hcd(hcd);
1495
1496	/* disable sys */
1497	usbhs_sys_host_ctrl(priv, 0);
1498
1499	dev_dbg(dev, "quit host\n");
1500
1501	return 0;
1502}
1503
1504int usbhs_mod_host_probe(struct usbhs_priv *priv)
1505{
1506	struct usbhsh_hpriv *hpriv;
1507	struct usb_hcd *hcd;
1508	struct usbhsh_device *udev;
1509	struct device *dev = usbhs_priv_to_dev(priv);
1510	int i;
1511
1512	/* initialize hcd */
1513	hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name);
1514	if (!hcd) {
1515		dev_err(dev, "Failed to create hcd\n");
1516		return -ENOMEM;
1517	}
1518	hcd->has_tt = 1; /* for low/full speed */
1519
1520	/*
1521	 * CAUTION
1522	 *
1523	 * There is no guarantee that it is possible to access usb module here.
1524	 * Don't accesses to it.
1525	 * The accesse will be enable after "usbhsh_start"
1526	 */
1527
1528	hpriv = usbhsh_hcd_to_hpriv(hcd);
1529
1530	/*
1531	 * register itself
1532	 */
1533	usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST);
1534
1535	/* init hpriv */
1536	hpriv->mod.name		= "host";
1537	hpriv->mod.start	= usbhsh_start;
1538	hpriv->mod.stop		= usbhsh_stop;
1539	usbhsh_port_stat_init(hpriv);
1540
1541	/* init all device */
1542	usbhsh_for_each_udev_with_dev0(udev, hpriv, i) {
1543		udev->usbv	= NULL;
1544		INIT_LIST_HEAD(&udev->ep_list_head);
1545	}
1546
1547	dev_info(dev, "host probed\n");
1548
1549	return 0;
1550}
1551
1552int usbhs_mod_host_remove(struct usbhs_priv *priv)
1553{
1554	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1555	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1556
1557	usb_put_hcd(hcd);
1558
1559	return 0;
1560}
1561