1 // SPDX-License-Identifier: GPL-1.0+
2 /*
3  * Renesas USB driver
4  *
5  * Copyright (C) 2011 Renesas Solutions Corp.
6  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7  */
8 #include <linux/io.h>
9 #include <linux/list.h>
10 #include <linux/module.h>
11 #include <linux/platform_device.h>
12 #include <linux/slab.h>
13 #include <linux/usb.h>
14 #include <linux/usb/hcd.h>
15 #include "common.h"
16 
17 /*
18  *** HARDWARE LIMITATION ***
19  *
20  * 1) renesas_usbhs has a limited number of controllable devices.
21  *    it can control only 9 devices in generally.
22  *	see DEVADDn / DCPMAXP / PIPEMAXP.
23  *
24  * 2) renesas_usbhs pipe number is limited.
25  *    the pipe will be re-used for each devices.
26  *    so, software should control DATA0/1 sequence of each devices.
27  */
28 
29 
30 /*
31  *		image of mod_host
32  *
33  * +--------+
34  * | udev 0 | --> it is used when set address
35  * +--------+
36  *
37  * +--------+					pipes are reused for each uep.
38  * | udev 1 |-+- [uep 0 (dcp) ] --+		pipe will be switched when
39  * +--------+ |			  |		other device requested
40  *	      +- [uep 1 (bulk)]	--|---+		   +--------------+
41  *	      |			  +--------------> | pipe0 (dcp)  |
42  *	      +- [uep 2 (bulk)]	-@    |		   +--------------+
43  *				      |		   | pipe1 (isoc) |
44  * +--------+			      |		   +--------------+
45  * | udev 2 |-+- [uep 0 (dcp) ]	-@    +----------> | pipe2 (bulk) |
46  * +--------+ |					   +--------------+
47  *	      +- [uep 1 (int) ]	----+	  +------> | pipe3 (bulk) |
48  *				    |	  |	   +--------------+
49  * +--------+			    +-----|------> | pipe4 (int)  |
50  * | udev 3 |-+- [uep 0 (dcp) ]	-@	  |	   +--------------+
51  * +--------+ |				  |	   | ....	  |
52  *	      +- [uep 1 (bulk)]	-@	  |	   | ....	  |
53  *	      |				  |
54  *	      +- [uep 2 (bulk)]-----------+
55  *
56  * @ :	uep requested free pipe, but all have been used.
57  *	now it is waiting for free pipe
58  */
59 
60 
61 /*
62  *		struct
63  */
64 struct usbhsh_request {
65 	struct urb		*urb;
66 	struct usbhs_pkt	pkt;
67 };
68 
69 struct usbhsh_device {
70 	struct usb_device	*usbv;
71 	struct list_head	ep_list_head; /* list of usbhsh_ep */
72 };
73 
74 struct usbhsh_ep {
75 	struct usbhs_pipe	*pipe;   /* attached pipe */
76 	struct usbhsh_device	*udev;   /* attached udev */
77 	struct usb_host_endpoint *ep;
78 	struct list_head	ep_list; /* list to usbhsh_device */
79 	unsigned int		counter; /* pipe attach counter */
80 };
81 
82 #define USBHSH_DEVICE_MAX	10 /* see DEVADDn / DCPMAXP / PIPEMAXP */
83 #define USBHSH_PORT_MAX		 7 /* see DEVADDn :: HUBPORT */
84 struct usbhsh_hpriv {
85 	struct usbhs_mod	mod;
86 	struct usbhs_pipe	*dcp;
87 
88 	struct usbhsh_device	udev[USBHSH_DEVICE_MAX];
89 
90 	u32	port_stat;	/* USB_PORT_STAT_xxx */
91 
92 	struct completion	setup_ack_done;
93 };
94 
95 
96 static const char usbhsh_hcd_name[] = "renesas_usbhs host";
97 
98 /*
99  *		macro
100  */
101 #define usbhsh_priv_to_hpriv(priv) \
102 	container_of(usbhs_mod_get(priv, USBHS_HOST), struct usbhsh_hpriv, mod)
103 
104 #define __usbhsh_for_each_udev(start, pos, h, i)	\
105 	for ((i) = start;						\
106 	     ((i) < USBHSH_DEVICE_MAX) && ((pos) = (h)->udev + (i));	\
107 	     (i)++)
108 
109 #define usbhsh_for_each_udev(pos, hpriv, i)	\
110 	__usbhsh_for_each_udev(1, pos, hpriv, i)
111 
112 #define usbhsh_for_each_udev_with_dev0(pos, hpriv, i)	\
113 	__usbhsh_for_each_udev(0, pos, hpriv, i)
114 
115 #define usbhsh_hcd_to_hpriv(h)	(struct usbhsh_hpriv *)((h)->hcd_priv)
116 #define usbhsh_hcd_to_dev(h)	((h)->self.controller)
117 
118 #define usbhsh_hpriv_to_priv(h)	((h)->mod.priv)
119 #define usbhsh_hpriv_to_dcp(h)	((h)->dcp)
120 #define usbhsh_hpriv_to_hcd(h)	\
121 	container_of((void *)h, struct usb_hcd, hcd_priv)
122 
123 #define usbhsh_ep_to_uep(u)	((u)->hcpriv)
124 #define usbhsh_uep_to_pipe(u)	((u)->pipe)
125 #define usbhsh_uep_to_udev(u)	((u)->udev)
126 #define usbhsh_uep_to_ep(u)	((u)->ep)
127 
128 #define usbhsh_urb_to_ureq(u)	((u)->hcpriv)
129 #define usbhsh_urb_to_usbv(u)	((u)->dev)
130 
131 #define usbhsh_usbv_to_udev(d)	dev_get_drvdata(&(d)->dev)
132 
133 #define usbhsh_udev_to_usbv(h)	((h)->usbv)
134 #define usbhsh_udev_is_used(h)	usbhsh_udev_to_usbv(h)
135 
136 #define usbhsh_pipe_to_uep(p)	((p)->mod_private)
137 
138 #define usbhsh_device_parent(d)		(usbhsh_usbv_to_udev((d)->usbv->parent))
139 #define usbhsh_device_hubport(d)	((d)->usbv->portnum)
140 #define usbhsh_device_number(h, d)	((int)((d) - (h)->udev))
141 #define usbhsh_device_nth(h, d)		((h)->udev + d)
142 #define usbhsh_device0(h)		usbhsh_device_nth(h, 0)
143 
144 #define usbhsh_port_stat_init(h)	((h)->port_stat = 0)
145 #define usbhsh_port_stat_set(h, s)	((h)->port_stat |= (s))
146 #define usbhsh_port_stat_clear(h, s)	((h)->port_stat &= ~(s))
147 #define usbhsh_port_stat_get(h)		((h)->port_stat)
148 
149 #define usbhsh_pkt_to_ureq(p)	\
150 	container_of((void *)p, struct usbhsh_request, pkt)
151 
152 /*
153  *		req alloc/free
154  */
usbhsh_ureq_alloc(struct usbhsh_hpriv * hpriv,struct urb * urb,gfp_t mem_flags)155 static struct usbhsh_request *usbhsh_ureq_alloc(struct usbhsh_hpriv *hpriv,
156 					       struct urb *urb,
157 					       gfp_t mem_flags)
158 {
159 	struct usbhsh_request *ureq;
160 
161 	ureq = kzalloc(sizeof(struct usbhsh_request), mem_flags);
162 	if (!ureq)
163 		return NULL;
164 
165 	usbhs_pkt_init(&ureq->pkt);
166 	ureq->urb = urb;
167 	usbhsh_urb_to_ureq(urb) = ureq;
168 
169 	return ureq;
170 }
171 
usbhsh_ureq_free(struct usbhsh_hpriv * hpriv,struct usbhsh_request * ureq)172 static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv,
173 			    struct usbhsh_request *ureq)
174 {
175 	usbhsh_urb_to_ureq(ureq->urb) = NULL;
176 	ureq->urb = NULL;
177 
178 	kfree(ureq);
179 }
180 
181 /*
182  *		status
183  */
usbhsh_is_running(struct usbhsh_hpriv * hpriv)184 static int usbhsh_is_running(struct usbhsh_hpriv *hpriv)
185 {
186 	/*
187 	 * we can decide some device is attached or not
188 	 * by checking mod.irq_attch
189 	 * see
190 	 *	usbhsh_irq_attch()
191 	 *	usbhsh_irq_dtch()
192 	 */
193 	return (hpriv->mod.irq_attch == NULL);
194 }
195 
196 /*
197  *		pipe control
198  */
usbhsh_endpoint_sequence_save(struct usbhsh_hpriv * hpriv,struct urb * urb,struct usbhs_pkt * pkt)199 static void usbhsh_endpoint_sequence_save(struct usbhsh_hpriv *hpriv,
200 					  struct urb *urb,
201 					  struct usbhs_pkt *pkt)
202 {
203 	int len = urb->actual_length;
204 	int maxp = usb_endpoint_maxp(&urb->ep->desc);
205 	int t = 0;
206 
207 	/* DCP is out of sequence control */
208 	if (usb_pipecontrol(urb->pipe))
209 		return;
210 
211 	/*
212 	 * renesas_usbhs pipe has a limitation in a number.
213 	 * So, driver should re-use the limited pipe for each device/endpoint.
214 	 * DATA0/1 sequence should be saved for it.
215 	 * see [image of mod_host]
216 	 *     [HARDWARE LIMITATION]
217 	 */
218 
219 	/*
220 	 * next sequence depends on actual_length
221 	 *
222 	 * ex) actual_length = 1147, maxp = 512
223 	 * data0 : 512
224 	 * data1 : 512
225 	 * data0 : 123
226 	 * data1 is the next sequence
227 	 */
228 	t = len / maxp;
229 	if (len % maxp)
230 		t++;
231 	if (pkt->zero)
232 		t++;
233 	t %= 2;
234 
235 	if (t)
236 		usb_dotoggle(urb->dev,
237 			     usb_pipeendpoint(urb->pipe),
238 			     usb_pipeout(urb->pipe));
239 }
240 
241 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
242 					       struct urb *urb);
243 
usbhsh_pipe_attach(struct usbhsh_hpriv * hpriv,struct urb * urb)244 static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv,
245 			      struct urb *urb)
246 {
247 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
248 	struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
249 	struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
250 	struct usbhs_pipe *pipe;
251 	struct usb_endpoint_descriptor *desc = &urb->ep->desc;
252 	struct device *dev = usbhs_priv_to_dev(priv);
253 	unsigned long flags;
254 	int dir_in_req = !!usb_pipein(urb->pipe);
255 	int is_dcp = usb_endpoint_xfer_control(desc);
256 	int i, dir_in;
257 	int ret = -EBUSY;
258 
259 	/********************  spin lock ********************/
260 	usbhs_lock(priv, flags);
261 
262 	/*
263 	 * if uep has been attached to pipe,
264 	 * reuse it
265 	 */
266 	if (usbhsh_uep_to_pipe(uep)) {
267 		ret = 0;
268 		goto usbhsh_pipe_attach_done;
269 	}
270 
271 	usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
272 
273 		/* check pipe type */
274 		if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc)))
275 			continue;
276 
277 		/* check pipe direction if normal pipe */
278 		if (!is_dcp) {
279 			dir_in = !!usbhs_pipe_is_dir_in(pipe);
280 			if (0 != (dir_in - dir_in_req))
281 				continue;
282 		}
283 
284 		/* check pipe is free */
285 		if (usbhsh_pipe_to_uep(pipe))
286 			continue;
287 
288 		/*
289 		 * attach pipe to uep
290 		 *
291 		 * usbhs_pipe_config_update() should be called after
292 		 * usbhs_set_device_config()
293 		 * see
294 		 *  DCPMAXP/PIPEMAXP
295 		 */
296 		usbhsh_uep_to_pipe(uep)		= pipe;
297 		usbhsh_pipe_to_uep(pipe)	= uep;
298 
299 		usbhs_pipe_config_update(pipe,
300 					 usbhsh_device_number(hpriv, udev),
301 					 usb_endpoint_num(desc),
302 					 usb_endpoint_maxp(desc));
303 
304 		dev_dbg(dev, "%s [%d-%d(%s:%s)]\n", __func__,
305 			usbhsh_device_number(hpriv, udev),
306 			usb_endpoint_num(desc),
307 			usbhs_pipe_name(pipe),
308 			dir_in_req ? "in" : "out");
309 
310 		ret = 0;
311 		break;
312 	}
313 
314 usbhsh_pipe_attach_done:
315 	if (0 == ret)
316 		uep->counter++;
317 
318 	usbhs_unlock(priv, flags);
319 	/********************  spin unlock ******************/
320 
321 	return ret;
322 }
323 
usbhsh_pipe_detach(struct usbhsh_hpriv * hpriv,struct usbhsh_ep * uep)324 static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv,
325 			       struct usbhsh_ep *uep)
326 {
327 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
328 	struct usbhs_pipe *pipe;
329 	struct device *dev = usbhs_priv_to_dev(priv);
330 	unsigned long flags;
331 
332 	if (unlikely(!uep)) {
333 		dev_err(dev, "no uep\n");
334 		return;
335 	}
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 doesn't have pipe\n");
344 	} else if (1 == uep->counter--) { /* last user */
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  */
usbhsh_endpoint_attach(struct usbhsh_hpriv * hpriv,struct urb * urb,gfp_t mem_flags)365 static 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 		return -ENOMEM;
380 
381 	/********************  spin lock ********************/
382 	usbhs_lock(priv, flags);
383 
384 	/*
385 	 * init endpoint
386 	 */
387 	uep->counter = 0;
388 	INIT_LIST_HEAD(&uep->ep_list);
389 	list_add_tail(&uep->ep_list, &udev->ep_list_head);
390 
391 	usbhsh_uep_to_udev(uep)	= udev;
392 	usbhsh_uep_to_ep(uep)	= ep;
393 	usbhsh_ep_to_uep(ep)	= uep;
394 
395 	usbhs_unlock(priv, flags);
396 	/********************  spin unlock ******************/
397 
398 	dev_dbg(dev, "%s [%d-%d]\n", __func__,
399 		usbhsh_device_number(hpriv, udev),
400 		usb_endpoint_num(desc));
401 
402 	return 0;
403 }
404 
usbhsh_endpoint_detach(struct usbhsh_hpriv * hpriv,struct usb_host_endpoint * ep)405 static void usbhsh_endpoint_detach(struct usbhsh_hpriv *hpriv,
406 				   struct usb_host_endpoint *ep)
407 {
408 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
409 	struct device *dev = usbhs_priv_to_dev(priv);
410 	struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
411 	unsigned long flags;
412 
413 	if (!uep)
414 		return;
415 
416 	dev_dbg(dev, "%s [%d-%d]\n", __func__,
417 		usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)),
418 		usb_endpoint_num(&ep->desc));
419 
420 	if (usbhsh_uep_to_pipe(uep))
421 		usbhsh_pipe_detach(hpriv, uep);
422 
423 	/********************  spin lock ********************/
424 	usbhs_lock(priv, flags);
425 
426 	/* remove this endpoint from udev */
427 	list_del_init(&uep->ep_list);
428 
429 	usbhsh_uep_to_udev(uep)	= NULL;
430 	usbhsh_uep_to_ep(uep)	= NULL;
431 	usbhsh_ep_to_uep(ep)	= NULL;
432 
433 	usbhs_unlock(priv, flags);
434 	/********************  spin unlock ******************/
435 
436 	kfree(uep);
437 }
438 
usbhsh_endpoint_detach_all(struct usbhsh_hpriv * hpriv,struct usbhsh_device * udev)439 static void usbhsh_endpoint_detach_all(struct usbhsh_hpriv *hpriv,
440 				       struct usbhsh_device *udev)
441 {
442 	struct usbhsh_ep *uep, *next;
443 
444 	list_for_each_entry_safe(uep, next, &udev->ep_list_head, ep_list)
445 		usbhsh_endpoint_detach(hpriv, usbhsh_uep_to_ep(uep));
446 }
447 
448 /*
449  *		device control
450  */
usbhsh_connected_to_rhdev(struct usb_hcd * hcd,struct usbhsh_device * udev)451 static int usbhsh_connected_to_rhdev(struct usb_hcd *hcd,
452 				     struct usbhsh_device *udev)
453 {
454 	struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
455 
456 	return hcd->self.root_hub == usbv->parent;
457 }
458 
usbhsh_device_has_endpoint(struct usbhsh_device * udev)459 static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
460 {
461 	return !list_empty(&udev->ep_list_head);
462 }
463 
usbhsh_device_get(struct usbhsh_hpriv * hpriv,struct urb * urb)464 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
465 					       struct urb *urb)
466 {
467 	struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
468 	struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
469 
470 	/* usbhsh_device_attach() is still not called */
471 	if (!udev)
472 		return NULL;
473 
474 	/* if it is device0, return it */
475 	if (0 == usb_pipedevice(urb->pipe))
476 		return usbhsh_device0(hpriv);
477 
478 	/* return attached device */
479 	return udev;
480 }
481 
usbhsh_device_attach(struct usbhsh_hpriv * hpriv,struct urb * urb)482 static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv,
483 						 struct urb *urb)
484 {
485 	struct usbhsh_device *udev = NULL;
486 	struct usbhsh_device *udev0 = usbhsh_device0(hpriv);
487 	struct usbhsh_device *pos;
488 	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
489 	struct device *dev = usbhsh_hcd_to_dev(hcd);
490 	struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
491 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
492 	unsigned long flags;
493 	u16 upphub, hubport;
494 	int i;
495 
496 	/*
497 	 * This function should be called only while urb is pointing to device0.
498 	 * It will attach unused usbhsh_device to urb (usbv),
499 	 * and initialize device0.
500 	 * You can use usbhsh_device_get() to get "current" udev,
501 	 * and usbhsh_usbv_to_udev() is for "attached" udev.
502 	 */
503 	if (0 != usb_pipedevice(urb->pipe)) {
504 		dev_err(dev, "%s fail: urb isn't pointing device0\n", __func__);
505 		return NULL;
506 	}
507 
508 	/********************  spin lock ********************/
509 	usbhs_lock(priv, flags);
510 
511 	/*
512 	 * find unused device
513 	 */
514 	usbhsh_for_each_udev(pos, hpriv, i) {
515 		if (usbhsh_udev_is_used(pos))
516 			continue;
517 		udev = pos;
518 		break;
519 	}
520 
521 	if (udev) {
522 		/*
523 		 * usbhsh_usbv_to_udev()
524 		 * usbhsh_udev_to_usbv()
525 		 * will be enable
526 		 */
527 		dev_set_drvdata(&usbv->dev, udev);
528 		udev->usbv = usbv;
529 	}
530 
531 	usbhs_unlock(priv, flags);
532 	/********************  spin unlock ******************/
533 
534 	if (!udev) {
535 		dev_err(dev, "no free usbhsh_device\n");
536 		return NULL;
537 	}
538 
539 	if (usbhsh_device_has_endpoint(udev)) {
540 		dev_warn(dev, "udev have old endpoint\n");
541 		usbhsh_endpoint_detach_all(hpriv, udev);
542 	}
543 
544 	if (usbhsh_device_has_endpoint(udev0)) {
545 		dev_warn(dev, "udev0 have old endpoint\n");
546 		usbhsh_endpoint_detach_all(hpriv, udev0);
547 	}
548 
549 	/* uep will be attached */
550 	INIT_LIST_HEAD(&udev0->ep_list_head);
551 	INIT_LIST_HEAD(&udev->ep_list_head);
552 
553 	/*
554 	 * set device0 config
555 	 */
556 	usbhs_set_device_config(priv,
557 				0, 0, 0, usbv->speed);
558 
559 	/*
560 	 * set new device config
561 	 */
562 	upphub	= 0;
563 	hubport	= 0;
564 	if (!usbhsh_connected_to_rhdev(hcd, udev)) {
565 		/* if udev is not connected to rhdev, it means parent is Hub */
566 		struct usbhsh_device *parent = usbhsh_device_parent(udev);
567 
568 		upphub	= usbhsh_device_number(hpriv, parent);
569 		hubport	= usbhsh_device_hubport(udev);
570 
571 		dev_dbg(dev, "%s connected to Hub [%d:%d](%p)\n", __func__,
572 			upphub, hubport, parent);
573 	}
574 
575 	usbhs_set_device_config(priv,
576 			       usbhsh_device_number(hpriv, udev),
577 			       upphub, hubport, usbv->speed);
578 
579 	dev_dbg(dev, "%s [%d](%p)\n", __func__,
580 		usbhsh_device_number(hpriv, udev), udev);
581 
582 	return udev;
583 }
584 
usbhsh_device_detach(struct usbhsh_hpriv * hpriv,struct usbhsh_device * udev)585 static void usbhsh_device_detach(struct usbhsh_hpriv *hpriv,
586 			       struct usbhsh_device *udev)
587 {
588 	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
589 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
590 	struct device *dev = usbhsh_hcd_to_dev(hcd);
591 	struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
592 	unsigned long flags;
593 
594 	dev_dbg(dev, "%s [%d](%p)\n", __func__,
595 		usbhsh_device_number(hpriv, udev), udev);
596 
597 	if (usbhsh_device_has_endpoint(udev)) {
598 		dev_warn(dev, "udev still have endpoint\n");
599 		usbhsh_endpoint_detach_all(hpriv, udev);
600 	}
601 
602 	/*
603 	 * There is nothing to do if it is device0.
604 	 * see
605 	 *  usbhsh_device_attach()
606 	 *  usbhsh_device_get()
607 	 */
608 	if (0 == usbhsh_device_number(hpriv, udev))
609 		return;
610 
611 	/********************  spin lock ********************/
612 	usbhs_lock(priv, flags);
613 
614 	/*
615 	 * usbhsh_usbv_to_udev()
616 	 * usbhsh_udev_to_usbv()
617 	 * will be disable
618 	 */
619 	dev_set_drvdata(&usbv->dev, NULL);
620 	udev->usbv = NULL;
621 
622 	usbhs_unlock(priv, flags);
623 	/********************  spin unlock ******************/
624 }
625 
626 /*
627  *		queue push/pop
628  */
usbhsh_queue_done(struct usbhs_priv * priv,struct usbhs_pkt * pkt)629 static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
630 {
631 	struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
632 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
633 	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
634 	struct urb *urb = ureq->urb;
635 	struct device *dev = usbhs_priv_to_dev(priv);
636 	int status = 0;
637 
638 	dev_dbg(dev, "%s\n", __func__);
639 
640 	if (!urb) {
641 		dev_warn(dev, "pkt doesn't have urb\n");
642 		return;
643 	}
644 
645 	if (!usbhsh_is_running(hpriv))
646 		status = -ESHUTDOWN;
647 
648 	urb->actual_length = pkt->actual;
649 
650 	usbhsh_endpoint_sequence_save(hpriv, urb, pkt);
651 	usbhsh_ureq_free(hpriv, ureq);
652 
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 
usbhsh_queue_push(struct usb_hcd * hcd,struct urb * urb,gfp_t mem_flags)659 static 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_dma_pop_handler;
685 	else
686 		pipe->handler = &usbhs_fifo_dma_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 
usbhsh_queue_force_pop(struct usbhs_priv * priv,struct usbhs_pipe * pipe)705 static 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 
usbhsh_queue_force_pop_all(struct usbhs_priv * priv)724 static 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  */
usbhsh_is_request_address(struct urb * urb)736 static 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 
usbhsh_setup_stage_packet_push(struct usbhsh_hpriv * hpriv,struct urb * urb,struct usbhs_pipe * pipe)749 static 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  */
usbhsh_data_stage_packet_done(struct usbhs_priv * priv,struct usbhs_pkt * pkt)797 static 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 
usbhsh_data_stage_packet_push(struct usbhsh_hpriv * hpriv,struct urb * urb,struct usbhs_pipe * pipe,gfp_t mem_flags)808 static 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  */
usbhsh_status_stage_packet_push(struct usbhsh_hpriv * hpriv,struct urb * urb,struct usbhs_pipe * pipe,gfp_t mem_flags)839 static 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 
usbhsh_dcp_queue_push(struct usb_hcd * hcd,struct urb * urb,gfp_t mflags)865 static 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  */
usbhsh_dma_map_ctrl(struct device * dma_dev,struct usbhs_pkt * pkt,int map)917 static int usbhsh_dma_map_ctrl(struct device *dma_dev, struct usbhs_pkt *pkt,
918 			       int map)
919 {
920 	if (map) {
921 		struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
922 		struct urb *urb = ureq->urb;
923 
924 		/* it can not use scatter/gather */
925 		if (urb->num_sgs)
926 			return -EINVAL;
927 
928 		pkt->dma = urb->transfer_dma;
929 		if (!pkt->dma)
930 			return -EINVAL;
931 	}
932 
933 	return 0;
934 }
935 
936 /*
937  *		for hc_driver
938  */
usbhsh_host_start(struct usb_hcd * hcd)939 static int usbhsh_host_start(struct usb_hcd *hcd)
940 {
941 	return 0;
942 }
943 
usbhsh_host_stop(struct usb_hcd * hcd)944 static void usbhsh_host_stop(struct usb_hcd *hcd)
945 {
946 }
947 
usbhsh_urb_enqueue(struct usb_hcd * hcd,struct urb * urb,gfp_t mem_flags)948 static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
949 			      struct urb *urb,
950 			      gfp_t mem_flags)
951 {
952 	struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
953 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
954 	struct device *dev = usbhs_priv_to_dev(priv);
955 	struct usb_host_endpoint *ep = urb->ep;
956 	struct usbhsh_device *new_udev = NULL;
957 	int is_dir_in = usb_pipein(urb->pipe);
958 	int ret;
959 
960 	dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
961 
962 	if (!usbhsh_is_running(hpriv)) {
963 		ret = -EIO;
964 		dev_err(dev, "host is not running\n");
965 		goto usbhsh_urb_enqueue_error_not_linked;
966 	}
967 
968 	ret = usb_hcd_link_urb_to_ep(hcd, urb);
969 	if (ret) {
970 		dev_err(dev, "urb link failed\n");
971 		goto usbhsh_urb_enqueue_error_not_linked;
972 	}
973 
974 	/*
975 	 * attach udev if needed
976 	 * see [image of mod_host]
977 	 */
978 	if (!usbhsh_device_get(hpriv, urb)) {
979 		new_udev = usbhsh_device_attach(hpriv, urb);
980 		if (!new_udev) {
981 			ret = -EIO;
982 			dev_err(dev, "device attach failed\n");
983 			goto usbhsh_urb_enqueue_error_not_linked;
984 		}
985 	}
986 
987 	/*
988 	 * attach endpoint if needed
989 	 * see [image of mod_host]
990 	 */
991 	if (!usbhsh_ep_to_uep(ep)) {
992 		ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags);
993 		if (ret < 0) {
994 			dev_err(dev, "endpoint attach failed\n");
995 			goto usbhsh_urb_enqueue_error_free_device;
996 		}
997 	}
998 
999 	/*
1000 	 * attach pipe to endpoint
1001 	 * see [image of mod_host]
1002 	 */
1003 	ret = usbhsh_pipe_attach(hpriv, urb);
1004 	if (ret < 0) {
1005 		dev_err(dev, "pipe attach failed\n");
1006 		goto usbhsh_urb_enqueue_error_free_endpoint;
1007 	}
1008 
1009 	/*
1010 	 * push packet
1011 	 */
1012 	if (usb_pipecontrol(urb->pipe))
1013 		ret = usbhsh_dcp_queue_push(hcd, urb, mem_flags);
1014 	else
1015 		ret = usbhsh_queue_push(hcd, urb, mem_flags);
1016 
1017 	return ret;
1018 
1019 usbhsh_urb_enqueue_error_free_endpoint:
1020 	usbhsh_endpoint_detach(hpriv, ep);
1021 usbhsh_urb_enqueue_error_free_device:
1022 	if (new_udev)
1023 		usbhsh_device_detach(hpriv, new_udev);
1024 usbhsh_urb_enqueue_error_not_linked:
1025 
1026 	dev_dbg(dev, "%s error\n", __func__);
1027 
1028 	return ret;
1029 }
1030 
usbhsh_urb_dequeue(struct usb_hcd * hcd,struct urb * urb,int status)1031 static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1032 {
1033 	struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1034 	struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
1035 
1036 	if (ureq) {
1037 		struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1038 		struct usbhs_pkt *pkt = &ureq->pkt;
1039 
1040 		usbhs_pkt_pop(pkt->pipe, pkt);
1041 		usbhsh_queue_done(priv, pkt);
1042 	}
1043 
1044 	return 0;
1045 }
1046 
usbhsh_endpoint_disable(struct usb_hcd * hcd,struct usb_host_endpoint * ep)1047 static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
1048 				    struct usb_host_endpoint *ep)
1049 {
1050 	struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
1051 	struct usbhsh_device *udev;
1052 	struct usbhsh_hpriv *hpriv;
1053 
1054 	/*
1055 	 * this function might be called manytimes by same hcd/ep
1056 	 * in-endpoint == out-endpoint if ep == dcp.
1057 	 */
1058 	if (!uep)
1059 		return;
1060 
1061 	udev	= usbhsh_uep_to_udev(uep);
1062 	hpriv	= usbhsh_hcd_to_hpriv(hcd);
1063 
1064 	usbhsh_endpoint_detach(hpriv, ep);
1065 
1066 	/*
1067 	 * if there is no endpoint,
1068 	 * free device
1069 	 */
1070 	if (!usbhsh_device_has_endpoint(udev))
1071 		usbhsh_device_detach(hpriv, udev);
1072 }
1073 
usbhsh_hub_status_data(struct usb_hcd * hcd,char * buf)1074 static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf)
1075 {
1076 	struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1077 	int roothub_id = 1; /* only 1 root hub */
1078 
1079 	/*
1080 	 * does port stat was changed ?
1081 	 * check USB_PORT_STAT_C_xxx << 16
1082 	 */
1083 	if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000)
1084 		*buf = (1 << roothub_id);
1085 	else
1086 		*buf = 0;
1087 
1088 	return !!(*buf);
1089 }
1090 
__usbhsh_hub_hub_feature(struct usbhsh_hpriv * hpriv,u16 typeReq,u16 wValue,u16 wIndex,char * buf,u16 wLength)1091 static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv,
1092 				    u16 typeReq, u16 wValue,
1093 				    u16 wIndex, char *buf, u16 wLength)
1094 {
1095 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1096 	struct device *dev = usbhs_priv_to_dev(priv);
1097 
1098 	switch (wValue) {
1099 	case C_HUB_OVER_CURRENT:
1100 	case C_HUB_LOCAL_POWER:
1101 		dev_dbg(dev, "%s :: C_HUB_xx\n", __func__);
1102 		return 0;
1103 	}
1104 
1105 	return -EPIPE;
1106 }
1107 
__usbhsh_hub_port_feature(struct usbhsh_hpriv * hpriv,u16 typeReq,u16 wValue,u16 wIndex,char * buf,u16 wLength)1108 static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
1109 				     u16 typeReq, u16 wValue,
1110 				     u16 wIndex, char *buf, u16 wLength)
1111 {
1112 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1113 	struct device *dev = usbhs_priv_to_dev(priv);
1114 	int enable = (typeReq == SetPortFeature);
1115 	int speed, i, timeout = 128;
1116 	int roothub_id = 1; /* only 1 root hub */
1117 
1118 	/* common error */
1119 	if (wIndex > roothub_id || wLength != 0)
1120 		return -EPIPE;
1121 
1122 	/* check wValue */
1123 	switch (wValue) {
1124 	case USB_PORT_FEAT_POWER:
1125 		usbhs_vbus_ctrl(priv, enable);
1126 		dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__);
1127 		break;
1128 
1129 	case USB_PORT_FEAT_ENABLE:
1130 	case USB_PORT_FEAT_SUSPEND:
1131 	case USB_PORT_FEAT_C_ENABLE:
1132 	case USB_PORT_FEAT_C_SUSPEND:
1133 	case USB_PORT_FEAT_C_CONNECTION:
1134 	case USB_PORT_FEAT_C_OVER_CURRENT:
1135 	case USB_PORT_FEAT_C_RESET:
1136 		dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__);
1137 		break;
1138 
1139 	case USB_PORT_FEAT_RESET:
1140 		if (!enable)
1141 			break;
1142 
1143 		usbhsh_port_stat_clear(hpriv,
1144 				       USB_PORT_STAT_HIGH_SPEED |
1145 				       USB_PORT_STAT_LOW_SPEED);
1146 
1147 		usbhsh_queue_force_pop_all(priv);
1148 
1149 		usbhs_bus_send_reset(priv);
1150 		msleep(20);
1151 		usbhs_bus_send_sof_enable(priv);
1152 
1153 		for (i = 0; i < timeout ; i++) {
1154 			switch (usbhs_bus_get_speed(priv)) {
1155 			case USB_SPEED_LOW:
1156 				speed = USB_PORT_STAT_LOW_SPEED;
1157 				goto got_usb_bus_speed;
1158 			case USB_SPEED_HIGH:
1159 				speed = USB_PORT_STAT_HIGH_SPEED;
1160 				goto got_usb_bus_speed;
1161 			case USB_SPEED_FULL:
1162 				speed = 0;
1163 				goto got_usb_bus_speed;
1164 			}
1165 
1166 			msleep(20);
1167 		}
1168 		return -EPIPE;
1169 
1170 got_usb_bus_speed:
1171 		usbhsh_port_stat_set(hpriv, speed);
1172 		usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE);
1173 
1174 		dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n",
1175 			__func__, speed);
1176 
1177 		/* status change is not needed */
1178 		return 0;
1179 
1180 	default:
1181 		return -EPIPE;
1182 	}
1183 
1184 	/* set/clear status */
1185 	if (enable)
1186 		usbhsh_port_stat_set(hpriv, (1 << wValue));
1187 	else
1188 		usbhsh_port_stat_clear(hpriv, (1 << wValue));
1189 
1190 	return 0;
1191 }
1192 
__usbhsh_hub_get_status(struct usbhsh_hpriv * hpriv,u16 typeReq,u16 wValue,u16 wIndex,char * buf,u16 wLength)1193 static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv,
1194 				   u16 typeReq, u16 wValue,
1195 				   u16 wIndex, char *buf, u16 wLength)
1196 {
1197 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1198 	struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
1199 	struct device *dev = usbhs_priv_to_dev(priv);
1200 	int roothub_id = 1; /* only 1 root hub */
1201 
1202 	switch (typeReq) {
1203 	case GetHubStatus:
1204 		dev_dbg(dev, "%s :: GetHubStatus\n", __func__);
1205 
1206 		*buf = 0x00;
1207 		break;
1208 
1209 	case GetPortStatus:
1210 		if (wIndex != roothub_id)
1211 			return -EPIPE;
1212 
1213 		dev_dbg(dev, "%s :: GetPortStatus\n", __func__);
1214 		*(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv));
1215 		break;
1216 
1217 	case GetHubDescriptor:
1218 		desc->bDescriptorType		= USB_DT_HUB;
1219 		desc->bHubContrCurrent		= 0;
1220 		desc->bNbrPorts			= roothub_id;
1221 		desc->bDescLength		= 9;
1222 		desc->bPwrOn2PwrGood		= 0;
1223 		desc->wHubCharacteristics	=
1224 			cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_NO_OCPM);
1225 		desc->u.hs.DeviceRemovable[0]	= (roothub_id << 1);
1226 		desc->u.hs.DeviceRemovable[1]	= ~0;
1227 		dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__);
1228 		break;
1229 	}
1230 
1231 	return 0;
1232 }
1233 
usbhsh_hub_control(struct usb_hcd * hcd,u16 typeReq,u16 wValue,u16 wIndex,char * buf,u16 wLength)1234 static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
1235 			      u16 wIndex, char *buf, u16 wLength)
1236 {
1237 	struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1238 	struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1239 	struct device *dev = usbhs_priv_to_dev(priv);
1240 	int ret = -EPIPE;
1241 
1242 	switch (typeReq) {
1243 
1244 	/* Hub Feature */
1245 	case ClearHubFeature:
1246 	case SetHubFeature:
1247 		ret = __usbhsh_hub_hub_feature(hpriv, typeReq,
1248 					       wValue, wIndex, buf, wLength);
1249 		break;
1250 
1251 	/* Port Feature */
1252 	case SetPortFeature:
1253 	case ClearPortFeature:
1254 		ret = __usbhsh_hub_port_feature(hpriv, typeReq,
1255 						wValue, wIndex, buf, wLength);
1256 		break;
1257 
1258 	/* Get status */
1259 	case GetHubStatus:
1260 	case GetPortStatus:
1261 	case GetHubDescriptor:
1262 		ret = __usbhsh_hub_get_status(hpriv, typeReq,
1263 					      wValue, wIndex, buf, wLength);
1264 		break;
1265 	}
1266 
1267 	dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n",
1268 		typeReq, ret, usbhsh_port_stat_get(hpriv));
1269 
1270 	return ret;
1271 }
1272 
usbhsh_bus_nop(struct usb_hcd * hcd)1273 static int usbhsh_bus_nop(struct usb_hcd *hcd)
1274 {
1275 	/* nothing to do */
1276 	return 0;
1277 }
1278 
1279 static const struct hc_driver usbhsh_driver = {
1280 	.description =		usbhsh_hcd_name,
1281 	.hcd_priv_size =	sizeof(struct usbhsh_hpriv),
1282 
1283 	/*
1284 	 * generic hardware linkage
1285 	 */
1286 	.flags =		HCD_DMA | HCD_USB2,
1287 
1288 	.start =		usbhsh_host_start,
1289 	.stop =			usbhsh_host_stop,
1290 
1291 	/*
1292 	 * managing i/o requests and associated device resources
1293 	 */
1294 	.urb_enqueue =		usbhsh_urb_enqueue,
1295 	.urb_dequeue =		usbhsh_urb_dequeue,
1296 	.endpoint_disable =	usbhsh_endpoint_disable,
1297 
1298 	/*
1299 	 * root hub
1300 	 */
1301 	.hub_status_data =	usbhsh_hub_status_data,
1302 	.hub_control =		usbhsh_hub_control,
1303 	.bus_suspend =		usbhsh_bus_nop,
1304 	.bus_resume =		usbhsh_bus_nop,
1305 };
1306 
1307 /*
1308  *		interrupt functions
1309  */
usbhsh_irq_attch(struct usbhs_priv * priv,struct usbhs_irq_state * irq_state)1310 static int usbhsh_irq_attch(struct usbhs_priv *priv,
1311 			    struct usbhs_irq_state *irq_state)
1312 {
1313 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1314 	struct device *dev = usbhs_priv_to_dev(priv);
1315 
1316 	dev_dbg(dev, "device attached\n");
1317 
1318 	usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
1319 	usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1320 
1321 	/*
1322 	 * attch interrupt might happen infinitely on some device
1323 	 * (on self power USB hub ?)
1324 	 * disable it here.
1325 	 *
1326 	 * usbhsh_is_running() becomes effective
1327 	 * according to this process.
1328 	 * see
1329 	 *	usbhsh_is_running()
1330 	 *	usbhsh_urb_enqueue()
1331 	 */
1332 	hpriv->mod.irq_attch = NULL;
1333 	usbhs_irq_callback_update(priv, &hpriv->mod);
1334 
1335 	return 0;
1336 }
1337 
usbhsh_irq_dtch(struct usbhs_priv * priv,struct usbhs_irq_state * irq_state)1338 static int usbhsh_irq_dtch(struct usbhs_priv *priv,
1339 			   struct usbhs_irq_state *irq_state)
1340 {
1341 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1342 	struct device *dev = usbhs_priv_to_dev(priv);
1343 
1344 	dev_dbg(dev, "device detached\n");
1345 
1346 	usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
1347 	usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1348 
1349 	/*
1350 	 * enable attch interrupt again
1351 	 *
1352 	 * usbhsh_is_running() becomes invalid
1353 	 * according to this process.
1354 	 * see
1355 	 *	usbhsh_is_running()
1356 	 *	usbhsh_urb_enqueue()
1357 	 */
1358 	hpriv->mod.irq_attch = usbhsh_irq_attch;
1359 	usbhs_irq_callback_update(priv, &hpriv->mod);
1360 
1361 	/*
1362 	 * usbhsh_queue_force_pop_all() should be called
1363 	 * after usbhsh_is_running() becomes invalid.
1364 	 */
1365 	usbhsh_queue_force_pop_all(priv);
1366 
1367 	return 0;
1368 }
1369 
usbhsh_irq_setup_ack(struct usbhs_priv * priv,struct usbhs_irq_state * irq_state)1370 static int usbhsh_irq_setup_ack(struct usbhs_priv *priv,
1371 				struct usbhs_irq_state *irq_state)
1372 {
1373 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1374 	struct device *dev = usbhs_priv_to_dev(priv);
1375 
1376 	dev_dbg(dev, "setup packet OK\n");
1377 
1378 	complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1379 
1380 	return 0;
1381 }
1382 
usbhsh_irq_setup_err(struct usbhs_priv * priv,struct usbhs_irq_state * irq_state)1383 static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
1384 				struct usbhs_irq_state *irq_state)
1385 {
1386 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1387 	struct device *dev = usbhs_priv_to_dev(priv);
1388 
1389 	dev_dbg(dev, "setup packet Err\n");
1390 
1391 	complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1392 
1393 	return 0;
1394 }
1395 
1396 /*
1397  *		module start/stop
1398  */
usbhsh_pipe_init_for_host(struct usbhs_priv * priv)1399 static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
1400 {
1401 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1402 	struct usbhs_pipe *pipe;
1403 	struct renesas_usbhs_driver_pipe_config *pipe_configs =
1404 					usbhs_get_dparam(priv, pipe_configs);
1405 	int pipe_size = usbhs_get_dparam(priv, pipe_size);
1406 	int old_type, dir_in, i;
1407 
1408 	/* init all pipe */
1409 	old_type = USB_ENDPOINT_XFER_CONTROL;
1410 	for (i = 0; i < pipe_size; i++) {
1411 
1412 		/*
1413 		 * data "output" will be finished as soon as possible,
1414 		 * but there is no guaranty at data "input" case.
1415 		 *
1416 		 * "input" needs "standby" pipe.
1417 		 * So, "input" direction pipe > "output" direction pipe
1418 		 * is good idea.
1419 		 *
1420 		 * 1st USB_ENDPOINT_XFER_xxx will be output direction,
1421 		 * and the other will be input direction here.
1422 		 *
1423 		 * ex)
1424 		 * ...
1425 		 * USB_ENDPOINT_XFER_ISOC -> dir out
1426 		 * USB_ENDPOINT_XFER_ISOC -> dir in
1427 		 * USB_ENDPOINT_XFER_BULK -> dir out
1428 		 * USB_ENDPOINT_XFER_BULK -> dir in
1429 		 * USB_ENDPOINT_XFER_BULK -> dir in
1430 		 * ...
1431 		 */
1432 		dir_in = (pipe_configs[i].type == old_type);
1433 		old_type = pipe_configs[i].type;
1434 
1435 		if (USB_ENDPOINT_XFER_CONTROL == pipe_configs[i].type) {
1436 			pipe = usbhs_dcp_malloc(priv);
1437 			usbhsh_hpriv_to_dcp(hpriv) = pipe;
1438 		} else {
1439 			pipe = usbhs_pipe_malloc(priv,
1440 						 pipe_configs[i].type,
1441 						 dir_in);
1442 		}
1443 
1444 		pipe->mod_private = NULL;
1445 	}
1446 }
1447 
usbhsh_start(struct usbhs_priv * priv)1448 static int usbhsh_start(struct usbhs_priv *priv)
1449 {
1450 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1451 	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1452 	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1453 	struct device *dev = usbhs_priv_to_dev(priv);
1454 	int ret;
1455 
1456 	/* add hcd */
1457 	ret = usb_add_hcd(hcd, 0, 0);
1458 	if (ret < 0)
1459 		return 0;
1460 	device_wakeup_enable(hcd->self.controller);
1461 
1462 	/*
1463 	 * pipe initialize and enable DCP
1464 	 */
1465 	usbhs_fifo_init(priv);
1466 	usbhs_pipe_init(priv,
1467 			usbhsh_dma_map_ctrl);
1468 	usbhsh_pipe_init_for_host(priv);
1469 
1470 	/*
1471 	 * system config enble
1472 	 * - HI speed
1473 	 * - host
1474 	 * - usb module
1475 	 */
1476 	usbhs_sys_host_ctrl(priv, 1);
1477 
1478 	/*
1479 	 * enable irq callback
1480 	 */
1481 	mod->irq_attch		= usbhsh_irq_attch;
1482 	mod->irq_dtch		= usbhsh_irq_dtch;
1483 	mod->irq_sack		= usbhsh_irq_setup_ack;
1484 	mod->irq_sign		= usbhsh_irq_setup_err;
1485 	usbhs_irq_callback_update(priv, mod);
1486 
1487 	dev_dbg(dev, "start host\n");
1488 
1489 	return ret;
1490 }
1491 
usbhsh_stop(struct usbhs_priv * priv)1492 static int usbhsh_stop(struct usbhs_priv *priv)
1493 {
1494 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1495 	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1496 	struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1497 	struct device *dev = usbhs_priv_to_dev(priv);
1498 
1499 	/*
1500 	 * disable irq callback
1501 	 */
1502 	mod->irq_attch	= NULL;
1503 	mod->irq_dtch	= NULL;
1504 	mod->irq_sack	= NULL;
1505 	mod->irq_sign	= NULL;
1506 	usbhs_irq_callback_update(priv, mod);
1507 
1508 	usb_remove_hcd(hcd);
1509 
1510 	/* disable sys */
1511 	usbhs_sys_host_ctrl(priv, 0);
1512 
1513 	dev_dbg(dev, "quit host\n");
1514 
1515 	return 0;
1516 }
1517 
usbhs_mod_host_probe(struct usbhs_priv * priv)1518 int usbhs_mod_host_probe(struct usbhs_priv *priv)
1519 {
1520 	struct usbhsh_hpriv *hpriv;
1521 	struct usb_hcd *hcd;
1522 	struct usbhsh_device *udev;
1523 	struct device *dev = usbhs_priv_to_dev(priv);
1524 	int i;
1525 
1526 	/* initialize hcd */
1527 	hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name);
1528 	if (!hcd) {
1529 		dev_err(dev, "Failed to create hcd\n");
1530 		return -ENOMEM;
1531 	}
1532 	hcd->has_tt = 1; /* for low/full speed */
1533 
1534 	/*
1535 	 * CAUTION
1536 	 *
1537 	 * There is no guarantee that it is possible to access usb module here.
1538 	 * Don't accesses to it.
1539 	 * The accesse will be enable after "usbhsh_start"
1540 	 */
1541 
1542 	hpriv = usbhsh_hcd_to_hpriv(hcd);
1543 
1544 	/*
1545 	 * register itself
1546 	 */
1547 	usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST);
1548 
1549 	/* init hpriv */
1550 	hpriv->mod.name		= "host";
1551 	hpriv->mod.start	= usbhsh_start;
1552 	hpriv->mod.stop		= usbhsh_stop;
1553 	usbhsh_port_stat_init(hpriv);
1554 
1555 	/* init all device */
1556 	usbhsh_for_each_udev_with_dev0(udev, hpriv, i) {
1557 		udev->usbv	= NULL;
1558 		INIT_LIST_HEAD(&udev->ep_list_head);
1559 	}
1560 
1561 	dev_info(dev, "host probed\n");
1562 
1563 	return 0;
1564 }
1565 
usbhs_mod_host_remove(struct usbhs_priv * priv)1566 int usbhs_mod_host_remove(struct usbhs_priv *priv)
1567 {
1568 	struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1569 	struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1570 
1571 	usb_put_hcd(hcd);
1572 
1573 	return 0;
1574 }
1575