xref: /linux/drivers/usb/gadget/udc/fusb300_udc.c (revision 7f71507851fc7764b36a3221839607d3a45c2025) 
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Fusb300 UDC (USB gadget)
4  *
5  * Copyright (C) 2010 Faraday Technology Corp.
6  *
7  * Author : Yuan-hsin Chen <yhchen@faraday-tech.com>
8  */
9 #include <linux/dma-mapping.h>
10 #include <linux/err.h>
11 #include <linux/interrupt.h>
12 #include <linux/io.h>
13 #include <linux/module.h>
14 #include <linux/platform_device.h>
15 #include <linux/usb/ch9.h>
16 #include <linux/usb/gadget.h>
17 
18 #include "fusb300_udc.h"
19 
20 MODULE_DESCRIPTION("FUSB300  USB gadget driver");
21 MODULE_LICENSE("GPL");
22 MODULE_AUTHOR("Yuan-Hsin Chen, Feng-Hsin Chiang <john453@faraday-tech.com>");
23 MODULE_ALIAS("platform:fusb300_udc");
24 
25 #define DRIVER_VERSION	"20 October 2010"
26 
27 static const char udc_name[] = "fusb300_udc";
28 static const char * const fusb300_ep_name[] = {
29 	"ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7", "ep8", "ep9",
30 	"ep10", "ep11", "ep12", "ep13", "ep14", "ep15"
31 };
32 
33 static void done(struct fusb300_ep *ep, struct fusb300_request *req,
34 		 int status);
35 
36 static void fusb300_enable_bit(struct fusb300 *fusb300, u32 offset,
37 			       u32 value)
38 {
39 	u32 reg = ioread32(fusb300->reg + offset);
40 
41 	reg |= value;
42 	iowrite32(reg, fusb300->reg + offset);
43 }
44 
45 static void fusb300_disable_bit(struct fusb300 *fusb300, u32 offset,
46 				u32 value)
47 {
48 	u32 reg = ioread32(fusb300->reg + offset);
49 
50 	reg &= ~value;
51 	iowrite32(reg, fusb300->reg + offset);
52 }
53 
54 
55 static void fusb300_ep_setting(struct fusb300_ep *ep,
56 			       struct fusb300_ep_info info)
57 {
58 	ep->epnum = info.epnum;
59 	ep->type = info.type;
60 }
61 
62 static int fusb300_ep_release(struct fusb300_ep *ep)
63 {
64 	if (!ep->epnum)
65 		return 0;
66 	ep->epnum = 0;
67 	ep->stall = 0;
68 	ep->wedged = 0;
69 	return 0;
70 }
71 
72 static void fusb300_set_fifo_entry(struct fusb300 *fusb300,
73 				   u32 ep)
74 {
75 	u32 val = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
76 
77 	val &= ~FUSB300_EPSET1_FIFOENTRY_MSK;
78 	val |= FUSB300_EPSET1_FIFOENTRY(FUSB300_FIFO_ENTRY_NUM);
79 	iowrite32(val, fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
80 }
81 
82 static void fusb300_set_start_entry(struct fusb300 *fusb300,
83 				    u8 ep)
84 {
85 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
86 	u32 start_entry = fusb300->fifo_entry_num * FUSB300_FIFO_ENTRY_NUM;
87 
88 	reg &= ~FUSB300_EPSET1_START_ENTRY_MSK	;
89 	reg |= FUSB300_EPSET1_START_ENTRY(start_entry);
90 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
91 	if (fusb300->fifo_entry_num == FUSB300_MAX_FIFO_ENTRY) {
92 		fusb300->fifo_entry_num = 0;
93 		fusb300->addrofs = 0;
94 		pr_err("fifo entry is over the maximum number!\n");
95 	} else
96 		fusb300->fifo_entry_num++;
97 }
98 
99 /* set fusb300_set_start_entry first before fusb300_set_epaddrofs */
100 static void fusb300_set_epaddrofs(struct fusb300 *fusb300,
101 				  struct fusb300_ep_info info)
102 {
103 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
104 
105 	reg &= ~FUSB300_EPSET2_ADDROFS_MSK;
106 	reg |= FUSB300_EPSET2_ADDROFS(fusb300->addrofs);
107 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
108 	fusb300->addrofs += (info.maxpacket + 7) / 8 * FUSB300_FIFO_ENTRY_NUM;
109 }
110 
111 static void ep_fifo_setting(struct fusb300 *fusb300,
112 			    struct fusb300_ep_info info)
113 {
114 	fusb300_set_fifo_entry(fusb300, info.epnum);
115 	fusb300_set_start_entry(fusb300, info.epnum);
116 	fusb300_set_epaddrofs(fusb300, info);
117 }
118 
119 static void fusb300_set_eptype(struct fusb300 *fusb300,
120 			       struct fusb300_ep_info info)
121 {
122 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
123 
124 	reg &= ~FUSB300_EPSET1_TYPE_MSK;
125 	reg |= FUSB300_EPSET1_TYPE(info.type);
126 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
127 }
128 
129 static void fusb300_set_epdir(struct fusb300 *fusb300,
130 			      struct fusb300_ep_info info)
131 {
132 	u32 reg;
133 
134 	if (!info.dir_in)
135 		return;
136 	reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
137 	reg &= ~FUSB300_EPSET1_DIR_MSK;
138 	reg |= FUSB300_EPSET1_DIRIN;
139 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
140 }
141 
142 static void fusb300_set_ep_active(struct fusb300 *fusb300,
143 			  u8 ep)
144 {
145 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
146 
147 	reg |= FUSB300_EPSET1_ACTEN;
148 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
149 }
150 
151 static void fusb300_set_epmps(struct fusb300 *fusb300,
152 			      struct fusb300_ep_info info)
153 {
154 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
155 
156 	reg &= ~FUSB300_EPSET2_MPS_MSK;
157 	reg |= FUSB300_EPSET2_MPS(info.maxpacket);
158 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
159 }
160 
161 static void fusb300_set_interval(struct fusb300 *fusb300,
162 				 struct fusb300_ep_info info)
163 {
164 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
165 
166 	reg &= ~FUSB300_EPSET1_INTERVAL(0x7);
167 	reg |= FUSB300_EPSET1_INTERVAL(info.interval);
168 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
169 }
170 
171 static void fusb300_set_bwnum(struct fusb300 *fusb300,
172 			      struct fusb300_ep_info info)
173 {
174 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
175 
176 	reg &= ~FUSB300_EPSET1_BWNUM(0x3);
177 	reg |= FUSB300_EPSET1_BWNUM(info.bw_num);
178 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
179 }
180 
181 static void set_ep_reg(struct fusb300 *fusb300,
182 		      struct fusb300_ep_info info)
183 {
184 	fusb300_set_eptype(fusb300, info);
185 	fusb300_set_epdir(fusb300, info);
186 	fusb300_set_epmps(fusb300, info);
187 
188 	if (info.interval)
189 		fusb300_set_interval(fusb300, info);
190 
191 	if (info.bw_num)
192 		fusb300_set_bwnum(fusb300, info);
193 
194 	fusb300_set_ep_active(fusb300, info.epnum);
195 }
196 
197 static int config_ep(struct fusb300_ep *ep,
198 		     const struct usb_endpoint_descriptor *desc)
199 {
200 	struct fusb300 *fusb300 = ep->fusb300;
201 	struct fusb300_ep_info info;
202 
203 	ep->ep.desc = desc;
204 
205 	info.interval = 0;
206 	info.addrofs = 0;
207 	info.bw_num = 0;
208 
209 	info.type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
210 	info.dir_in = (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ? 1 : 0;
211 	info.maxpacket = usb_endpoint_maxp(desc);
212 	info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
213 
214 	if ((info.type == USB_ENDPOINT_XFER_INT) ||
215 	   (info.type == USB_ENDPOINT_XFER_ISOC)) {
216 		info.interval = desc->bInterval;
217 		if (info.type == USB_ENDPOINT_XFER_ISOC)
218 			info.bw_num = usb_endpoint_maxp_mult(desc);
219 	}
220 
221 	ep_fifo_setting(fusb300, info);
222 
223 	set_ep_reg(fusb300, info);
224 
225 	fusb300_ep_setting(ep, info);
226 
227 	fusb300->ep[info.epnum] = ep;
228 
229 	return 0;
230 }
231 
232 static int fusb300_enable(struct usb_ep *_ep,
233 			  const struct usb_endpoint_descriptor *desc)
234 {
235 	struct fusb300_ep *ep;
236 
237 	ep = container_of(_ep, struct fusb300_ep, ep);
238 
239 	if (ep->fusb300->reenum) {
240 		ep->fusb300->fifo_entry_num = 0;
241 		ep->fusb300->addrofs = 0;
242 		ep->fusb300->reenum = 0;
243 	}
244 
245 	return config_ep(ep, desc);
246 }
247 
248 static int fusb300_disable(struct usb_ep *_ep)
249 {
250 	struct fusb300_ep *ep;
251 	struct fusb300_request *req;
252 	unsigned long flags;
253 
254 	ep = container_of(_ep, struct fusb300_ep, ep);
255 
256 	BUG_ON(!ep);
257 
258 	while (!list_empty(&ep->queue)) {
259 		req = list_entry(ep->queue.next, struct fusb300_request, queue);
260 		spin_lock_irqsave(&ep->fusb300->lock, flags);
261 		done(ep, req, -ECONNRESET);
262 		spin_unlock_irqrestore(&ep->fusb300->lock, flags);
263 	}
264 
265 	return fusb300_ep_release(ep);
266 }
267 
268 static struct usb_request *fusb300_alloc_request(struct usb_ep *_ep,
269 						gfp_t gfp_flags)
270 {
271 	struct fusb300_request *req;
272 
273 	req = kzalloc(sizeof(struct fusb300_request), gfp_flags);
274 	if (!req)
275 		return NULL;
276 	INIT_LIST_HEAD(&req->queue);
277 
278 	return &req->req;
279 }
280 
281 static void fusb300_free_request(struct usb_ep *_ep, struct usb_request *_req)
282 {
283 	struct fusb300_request *req;
284 
285 	req = container_of(_req, struct fusb300_request, req);
286 	kfree(req);
287 }
288 
289 static int enable_fifo_int(struct fusb300_ep *ep)
290 {
291 	struct fusb300 *fusb300 = ep->fusb300;
292 
293 	if (ep->epnum) {
294 		fusb300_enable_bit(fusb300, FUSB300_OFFSET_IGER0,
295 			FUSB300_IGER0_EEPn_FIFO_INT(ep->epnum));
296 	} else {
297 		pr_err("can't enable_fifo_int ep0\n");
298 		return -EINVAL;
299 	}
300 
301 	return 0;
302 }
303 
304 static int disable_fifo_int(struct fusb300_ep *ep)
305 {
306 	struct fusb300 *fusb300 = ep->fusb300;
307 
308 	if (ep->epnum) {
309 		fusb300_disable_bit(fusb300, FUSB300_OFFSET_IGER0,
310 			FUSB300_IGER0_EEPn_FIFO_INT(ep->epnum));
311 	} else {
312 		pr_err("can't disable_fifo_int ep0\n");
313 		return -EINVAL;
314 	}
315 
316 	return 0;
317 }
318 
319 static void fusb300_set_cxlen(struct fusb300 *fusb300, u32 length)
320 {
321 	u32 reg;
322 
323 	reg = ioread32(fusb300->reg + FUSB300_OFFSET_CSR);
324 	reg &= ~FUSB300_CSR_LEN_MSK;
325 	reg |= FUSB300_CSR_LEN(length);
326 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_CSR);
327 }
328 
329 /* write data to cx fifo */
330 static void fusb300_wrcxf(struct fusb300_ep *ep,
331 		   struct fusb300_request *req)
332 {
333 	int i = 0;
334 	u8 *tmp;
335 	u32 data;
336 	struct fusb300 *fusb300 = ep->fusb300;
337 	u32 length = req->req.length - req->req.actual;
338 
339 	tmp = req->req.buf + req->req.actual;
340 
341 	if (length > SS_CTL_MAX_PACKET_SIZE) {
342 		fusb300_set_cxlen(fusb300, SS_CTL_MAX_PACKET_SIZE);
343 		for (i = (SS_CTL_MAX_PACKET_SIZE >> 2); i > 0; i--) {
344 			data = *tmp | *(tmp + 1) << 8 | *(tmp + 2) << 16 |
345 				*(tmp + 3) << 24;
346 			iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
347 			tmp += 4;
348 		}
349 		req->req.actual += SS_CTL_MAX_PACKET_SIZE;
350 	} else { /* length is less than max packet size */
351 		fusb300_set_cxlen(fusb300, length);
352 		for (i = length >> 2; i > 0; i--) {
353 			data = *tmp | *(tmp + 1) << 8 | *(tmp + 2) << 16 |
354 				*(tmp + 3) << 24;
355 			printk(KERN_DEBUG "    0x%x\n", data);
356 			iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
357 			tmp = tmp + 4;
358 		}
359 		switch (length % 4) {
360 		case 1:
361 			data = *tmp;
362 			printk(KERN_DEBUG "    0x%x\n", data);
363 			iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
364 			break;
365 		case 2:
366 			data = *tmp | *(tmp + 1) << 8;
367 			printk(KERN_DEBUG "    0x%x\n", data);
368 			iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
369 			break;
370 		case 3:
371 			data = *tmp | *(tmp + 1) << 8 | *(tmp + 2) << 16;
372 			printk(KERN_DEBUG "    0x%x\n", data);
373 			iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
374 			break;
375 		default:
376 			break;
377 		}
378 		req->req.actual += length;
379 	}
380 }
381 
382 static void fusb300_set_epnstall(struct fusb300 *fusb300, u8 ep)
383 {
384 	fusb300_enable_bit(fusb300, FUSB300_OFFSET_EPSET0(ep),
385 		FUSB300_EPSET0_STL);
386 }
387 
388 static void fusb300_clear_epnstall(struct fusb300 *fusb300, u8 ep)
389 {
390 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET0(ep));
391 
392 	if (reg & FUSB300_EPSET0_STL) {
393 		printk(KERN_DEBUG "EP%d stall... Clear!!\n", ep);
394 		reg |= FUSB300_EPSET0_STL_CLR;
395 		iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET0(ep));
396 	}
397 }
398 
399 static void ep0_queue(struct fusb300_ep *ep, struct fusb300_request *req)
400 {
401 	if (ep->fusb300->ep0_dir) { /* if IN */
402 		if (req->req.length) {
403 			fusb300_wrcxf(ep, req);
404 		} else
405 			printk(KERN_DEBUG "%s : req->req.length = 0x%x\n",
406 				__func__, req->req.length);
407 		if ((req->req.length == req->req.actual) ||
408 		    (req->req.actual < ep->ep.maxpacket))
409 			done(ep, req, 0);
410 	} else { /* OUT */
411 		if (!req->req.length)
412 			done(ep, req, 0);
413 		else
414 			fusb300_enable_bit(ep->fusb300, FUSB300_OFFSET_IGER1,
415 				FUSB300_IGER1_CX_OUT_INT);
416 	}
417 }
418 
419 static int fusb300_queue(struct usb_ep *_ep, struct usb_request *_req,
420 			 gfp_t gfp_flags)
421 {
422 	struct fusb300_ep *ep;
423 	struct fusb300_request *req;
424 	unsigned long flags;
425 	int request  = 0;
426 
427 	ep = container_of(_ep, struct fusb300_ep, ep);
428 	req = container_of(_req, struct fusb300_request, req);
429 
430 	if (ep->fusb300->gadget.speed == USB_SPEED_UNKNOWN)
431 		return -ESHUTDOWN;
432 
433 	spin_lock_irqsave(&ep->fusb300->lock, flags);
434 
435 	if (list_empty(&ep->queue))
436 		request = 1;
437 
438 	list_add_tail(&req->queue, &ep->queue);
439 
440 	req->req.actual = 0;
441 	req->req.status = -EINPROGRESS;
442 
443 	if (ep->ep.desc == NULL) /* ep0 */
444 		ep0_queue(ep, req);
445 	else if (request && !ep->stall)
446 		enable_fifo_int(ep);
447 
448 	spin_unlock_irqrestore(&ep->fusb300->lock, flags);
449 
450 	return 0;
451 }
452 
453 static int fusb300_dequeue(struct usb_ep *_ep, struct usb_request *_req)
454 {
455 	struct fusb300_ep *ep;
456 	struct fusb300_request *req;
457 	unsigned long flags;
458 
459 	ep = container_of(_ep, struct fusb300_ep, ep);
460 	req = container_of(_req, struct fusb300_request, req);
461 
462 	spin_lock_irqsave(&ep->fusb300->lock, flags);
463 	if (!list_empty(&ep->queue))
464 		done(ep, req, -ECONNRESET);
465 	spin_unlock_irqrestore(&ep->fusb300->lock, flags);
466 
467 	return 0;
468 }
469 
470 static int fusb300_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedge)
471 {
472 	struct fusb300_ep *ep;
473 	struct fusb300 *fusb300;
474 	unsigned long flags;
475 	int ret = 0;
476 
477 	ep = container_of(_ep, struct fusb300_ep, ep);
478 
479 	fusb300 = ep->fusb300;
480 
481 	spin_lock_irqsave(&ep->fusb300->lock, flags);
482 
483 	if (!list_empty(&ep->queue)) {
484 		ret = -EAGAIN;
485 		goto out;
486 	}
487 
488 	if (value) {
489 		fusb300_set_epnstall(fusb300, ep->epnum);
490 		ep->stall = 1;
491 		if (wedge)
492 			ep->wedged = 1;
493 	} else {
494 		fusb300_clear_epnstall(fusb300, ep->epnum);
495 		ep->stall = 0;
496 		ep->wedged = 0;
497 	}
498 
499 out:
500 	spin_unlock_irqrestore(&ep->fusb300->lock, flags);
501 	return ret;
502 }
503 
504 static int fusb300_set_halt(struct usb_ep *_ep, int value)
505 {
506 	return fusb300_set_halt_and_wedge(_ep, value, 0);
507 }
508 
509 static int fusb300_set_wedge(struct usb_ep *_ep)
510 {
511 	return fusb300_set_halt_and_wedge(_ep, 1, 1);
512 }
513 
514 static void fusb300_fifo_flush(struct usb_ep *_ep)
515 {
516 }
517 
518 static const struct usb_ep_ops fusb300_ep_ops = {
519 	.enable		= fusb300_enable,
520 	.disable	= fusb300_disable,
521 
522 	.alloc_request	= fusb300_alloc_request,
523 	.free_request	= fusb300_free_request,
524 
525 	.queue		= fusb300_queue,
526 	.dequeue	= fusb300_dequeue,
527 
528 	.set_halt	= fusb300_set_halt,
529 	.fifo_flush	= fusb300_fifo_flush,
530 	.set_wedge	= fusb300_set_wedge,
531 };
532 
533 /*****************************************************************************/
534 static void fusb300_clear_int(struct fusb300 *fusb300, u32 offset,
535 		       u32 value)
536 {
537 	iowrite32(value, fusb300->reg + offset);
538 }
539 
540 static void fusb300_reset(void)
541 {
542 }
543 
544 static void fusb300_set_cxstall(struct fusb300 *fusb300)
545 {
546 	fusb300_enable_bit(fusb300, FUSB300_OFFSET_CSR,
547 			   FUSB300_CSR_STL);
548 }
549 
550 static void fusb300_set_cxdone(struct fusb300 *fusb300)
551 {
552 	fusb300_enable_bit(fusb300, FUSB300_OFFSET_CSR,
553 			   FUSB300_CSR_DONE);
554 }
555 
556 /* read data from cx fifo */
557 static void fusb300_rdcxf(struct fusb300 *fusb300,
558 		   u8 *buffer, u32 length)
559 {
560 	int i = 0;
561 	u8 *tmp;
562 	u32 data;
563 
564 	tmp = buffer;
565 
566 	for (i = (length >> 2); i > 0; i--) {
567 		data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
568 		printk(KERN_DEBUG "    0x%x\n", data);
569 		*tmp = data & 0xFF;
570 		*(tmp + 1) = (data >> 8) & 0xFF;
571 		*(tmp + 2) = (data >> 16) & 0xFF;
572 		*(tmp + 3) = (data >> 24) & 0xFF;
573 		tmp = tmp + 4;
574 	}
575 
576 	switch (length % 4) {
577 	case 1:
578 		data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
579 		printk(KERN_DEBUG "    0x%x\n", data);
580 		*tmp = data & 0xFF;
581 		break;
582 	case 2:
583 		data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
584 		printk(KERN_DEBUG "    0x%x\n", data);
585 		*tmp = data & 0xFF;
586 		*(tmp + 1) = (data >> 8) & 0xFF;
587 		break;
588 	case 3:
589 		data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
590 		printk(KERN_DEBUG "    0x%x\n", data);
591 		*tmp = data & 0xFF;
592 		*(tmp + 1) = (data >> 8) & 0xFF;
593 		*(tmp + 2) = (data >> 16) & 0xFF;
594 		break;
595 	default:
596 		break;
597 	}
598 }
599 
600 static void fusb300_rdfifo(struct fusb300_ep *ep,
601 			  struct fusb300_request *req,
602 			  u32 length)
603 {
604 	int i = 0;
605 	u8 *tmp;
606 	u32 data, reg;
607 	struct fusb300 *fusb300 = ep->fusb300;
608 
609 	tmp = req->req.buf + req->req.actual;
610 	req->req.actual += length;
611 
612 	if (req->req.actual > req->req.length)
613 		printk(KERN_DEBUG "req->req.actual > req->req.length\n");
614 
615 	for (i = (length >> 2); i > 0; i--) {
616 		data = ioread32(fusb300->reg +
617 			FUSB300_OFFSET_EPPORT(ep->epnum));
618 		*tmp = data & 0xFF;
619 		*(tmp + 1) = (data >> 8) & 0xFF;
620 		*(tmp + 2) = (data >> 16) & 0xFF;
621 		*(tmp + 3) = (data >> 24) & 0xFF;
622 		tmp = tmp + 4;
623 	}
624 
625 	switch (length % 4) {
626 	case 1:
627 		data = ioread32(fusb300->reg +
628 			FUSB300_OFFSET_EPPORT(ep->epnum));
629 		*tmp = data & 0xFF;
630 		break;
631 	case 2:
632 		data = ioread32(fusb300->reg +
633 			FUSB300_OFFSET_EPPORT(ep->epnum));
634 		*tmp = data & 0xFF;
635 		*(tmp + 1) = (data >> 8) & 0xFF;
636 		break;
637 	case 3:
638 		data = ioread32(fusb300->reg +
639 			FUSB300_OFFSET_EPPORT(ep->epnum));
640 		*tmp = data & 0xFF;
641 		*(tmp + 1) = (data >> 8) & 0xFF;
642 		*(tmp + 2) = (data >> 16) & 0xFF;
643 		break;
644 	default:
645 		break;
646 	}
647 
648 	do {
649 		reg = ioread32(fusb300->reg + FUSB300_OFFSET_IGR1);
650 		reg &= FUSB300_IGR1_SYNF0_EMPTY_INT;
651 		if (i)
652 			printk(KERN_INFO "sync fifo is not empty!\n");
653 		i++;
654 	} while (!reg);
655 }
656 
657 static u8 fusb300_get_epnstall(struct fusb300 *fusb300, u8 ep)
658 {
659 	u8 value;
660 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET0(ep));
661 
662 	value = reg & FUSB300_EPSET0_STL;
663 
664 	return value;
665 }
666 
667 static u8 fusb300_get_cxstall(struct fusb300 *fusb300)
668 {
669 	u8 value;
670 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_CSR);
671 
672 	value = (reg & FUSB300_CSR_STL) >> 1;
673 
674 	return value;
675 }
676 
677 static void request_error(struct fusb300 *fusb300)
678 {
679 	fusb300_set_cxstall(fusb300);
680 	printk(KERN_DEBUG "request error!!\n");
681 }
682 
683 static void get_status(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
684 __releases(fusb300->lock)
685 __acquires(fusb300->lock)
686 {
687 	u8 ep;
688 	u16 status = 0;
689 	u16 w_index = ctrl->wIndex;
690 
691 	switch (ctrl->bRequestType & USB_RECIP_MASK) {
692 	case USB_RECIP_DEVICE:
693 		status = 1 << USB_DEVICE_SELF_POWERED;
694 		break;
695 	case USB_RECIP_INTERFACE:
696 		status = 0;
697 		break;
698 	case USB_RECIP_ENDPOINT:
699 		ep = w_index & USB_ENDPOINT_NUMBER_MASK;
700 		if (ep) {
701 			if (fusb300_get_epnstall(fusb300, ep))
702 				status = 1 << USB_ENDPOINT_HALT;
703 		} else {
704 			if (fusb300_get_cxstall(fusb300))
705 				status = 0;
706 		}
707 		break;
708 
709 	default:
710 		request_error(fusb300);
711 		return;		/* exit */
712 	}
713 
714 	fusb300->ep0_data = cpu_to_le16(status);
715 	fusb300->ep0_req->buf = &fusb300->ep0_data;
716 	fusb300->ep0_req->length = 2;
717 
718 	spin_unlock(&fusb300->lock);
719 	fusb300_queue(fusb300->gadget.ep0, fusb300->ep0_req, GFP_KERNEL);
720 	spin_lock(&fusb300->lock);
721 }
722 
723 static void set_feature(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
724 {
725 	u8 ep;
726 
727 	switch (ctrl->bRequestType & USB_RECIP_MASK) {
728 	case USB_RECIP_DEVICE:
729 		fusb300_set_cxdone(fusb300);
730 		break;
731 	case USB_RECIP_INTERFACE:
732 		fusb300_set_cxdone(fusb300);
733 		break;
734 	case USB_RECIP_ENDPOINT: {
735 		u16 w_index = le16_to_cpu(ctrl->wIndex);
736 
737 		ep = w_index & USB_ENDPOINT_NUMBER_MASK;
738 		if (ep)
739 			fusb300_set_epnstall(fusb300, ep);
740 		else
741 			fusb300_set_cxstall(fusb300);
742 		fusb300_set_cxdone(fusb300);
743 		}
744 		break;
745 	default:
746 		request_error(fusb300);
747 		break;
748 	}
749 }
750 
751 static void fusb300_clear_seqnum(struct fusb300 *fusb300, u8 ep)
752 {
753 	fusb300_enable_bit(fusb300, FUSB300_OFFSET_EPSET0(ep),
754 			    FUSB300_EPSET0_CLRSEQNUM);
755 }
756 
757 static void clear_feature(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
758 {
759 	struct fusb300_ep *ep =
760 		fusb300->ep[ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK];
761 
762 	switch (ctrl->bRequestType & USB_RECIP_MASK) {
763 	case USB_RECIP_DEVICE:
764 		fusb300_set_cxdone(fusb300);
765 		break;
766 	case USB_RECIP_INTERFACE:
767 		fusb300_set_cxdone(fusb300);
768 		break;
769 	case USB_RECIP_ENDPOINT:
770 		if (ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK) {
771 			if (ep->wedged) {
772 				fusb300_set_cxdone(fusb300);
773 				break;
774 			}
775 			if (ep->stall) {
776 				ep->stall = 0;
777 				fusb300_clear_seqnum(fusb300, ep->epnum);
778 				fusb300_clear_epnstall(fusb300, ep->epnum);
779 				if (!list_empty(&ep->queue))
780 					enable_fifo_int(ep);
781 			}
782 		}
783 		fusb300_set_cxdone(fusb300);
784 		break;
785 	default:
786 		request_error(fusb300);
787 		break;
788 	}
789 }
790 
791 static void fusb300_set_dev_addr(struct fusb300 *fusb300, u16 addr)
792 {
793 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_DAR);
794 
795 	reg &= ~FUSB300_DAR_DRVADDR_MSK;
796 	reg |= FUSB300_DAR_DRVADDR(addr);
797 
798 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_DAR);
799 }
800 
801 static void set_address(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
802 {
803 	if (ctrl->wValue >= 0x0100)
804 		request_error(fusb300);
805 	else {
806 		fusb300_set_dev_addr(fusb300, ctrl->wValue);
807 		fusb300_set_cxdone(fusb300);
808 	}
809 }
810 
811 #define UVC_COPY_DESCRIPTORS(mem, src) \
812 	do { \
813 		const struct usb_descriptor_header * const *__src; \
814 		for (__src = src; *__src; ++__src) { \
815 			memcpy(mem, *__src, (*__src)->bLength); \
816 			mem += (*__src)->bLength; \
817 		} \
818 	} while (0)
819 
820 static int setup_packet(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
821 {
822 	u8 *p = (u8 *)ctrl;
823 	u8 ret = 0;
824 	u8 i = 0;
825 
826 	fusb300_rdcxf(fusb300, p, 8);
827 	fusb300->ep0_dir = ctrl->bRequestType & USB_DIR_IN;
828 	fusb300->ep0_length = ctrl->wLength;
829 
830 	/* check request */
831 	if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
832 		switch (ctrl->bRequest) {
833 		case USB_REQ_GET_STATUS:
834 			get_status(fusb300, ctrl);
835 			break;
836 		case USB_REQ_CLEAR_FEATURE:
837 			clear_feature(fusb300, ctrl);
838 			break;
839 		case USB_REQ_SET_FEATURE:
840 			set_feature(fusb300, ctrl);
841 			break;
842 		case USB_REQ_SET_ADDRESS:
843 			set_address(fusb300, ctrl);
844 			break;
845 		case USB_REQ_SET_CONFIGURATION:
846 			fusb300_enable_bit(fusb300, FUSB300_OFFSET_DAR,
847 					   FUSB300_DAR_SETCONFG);
848 			/* clear sequence number */
849 			for (i = 1; i <= FUSB300_MAX_NUM_EP; i++)
850 				fusb300_clear_seqnum(fusb300, i);
851 			fusb300->reenum = 1;
852 			ret = 1;
853 			break;
854 		default:
855 			ret = 1;
856 			break;
857 		}
858 	} else
859 		ret = 1;
860 
861 	return ret;
862 }
863 
864 static void done(struct fusb300_ep *ep, struct fusb300_request *req,
865 		 int status)
866 {
867 	list_del_init(&req->queue);
868 
869 	/* don't modify queue heads during completion callback */
870 	if (ep->fusb300->gadget.speed == USB_SPEED_UNKNOWN)
871 		req->req.status = -ESHUTDOWN;
872 	else
873 		req->req.status = status;
874 
875 	spin_unlock(&ep->fusb300->lock);
876 	usb_gadget_giveback_request(&ep->ep, &req->req);
877 	spin_lock(&ep->fusb300->lock);
878 
879 	if (ep->epnum) {
880 		disable_fifo_int(ep);
881 		if (!list_empty(&ep->queue))
882 			enable_fifo_int(ep);
883 	} else
884 		fusb300_set_cxdone(ep->fusb300);
885 }
886 
887 static void fusb300_fill_idma_prdtbl(struct fusb300_ep *ep, dma_addr_t d,
888 		u32 len)
889 {
890 	u32 value;
891 	u32 reg;
892 
893 	/* wait SW owner */
894 	do {
895 		reg = ioread32(ep->fusb300->reg +
896 			FUSB300_OFFSET_EPPRD_W0(ep->epnum));
897 		reg &= FUSB300_EPPRD0_H;
898 	} while (reg);
899 
900 	iowrite32(d, ep->fusb300->reg + FUSB300_OFFSET_EPPRD_W1(ep->epnum));
901 
902 	value = FUSB300_EPPRD0_BTC(len) | FUSB300_EPPRD0_H |
903 		FUSB300_EPPRD0_F | FUSB300_EPPRD0_L | FUSB300_EPPRD0_I;
904 	iowrite32(value, ep->fusb300->reg + FUSB300_OFFSET_EPPRD_W0(ep->epnum));
905 
906 	iowrite32(0x0, ep->fusb300->reg + FUSB300_OFFSET_EPPRD_W2(ep->epnum));
907 
908 	fusb300_enable_bit(ep->fusb300, FUSB300_OFFSET_EPPRDRDY,
909 		FUSB300_EPPRDR_EP_PRD_RDY(ep->epnum));
910 }
911 
912 static void fusb300_wait_idma_finished(struct fusb300_ep *ep)
913 {
914 	u32 reg;
915 
916 	do {
917 		reg = ioread32(ep->fusb300->reg + FUSB300_OFFSET_IGR1);
918 		if ((reg & FUSB300_IGR1_VBUS_CHG_INT) ||
919 		    (reg & FUSB300_IGR1_WARM_RST_INT) ||
920 		    (reg & FUSB300_IGR1_HOT_RST_INT) ||
921 		    (reg & FUSB300_IGR1_USBRST_INT)
922 		)
923 			goto IDMA_RESET;
924 		reg = ioread32(ep->fusb300->reg + FUSB300_OFFSET_IGR0);
925 		reg &= FUSB300_IGR0_EPn_PRD_INT(ep->epnum);
926 	} while (!reg);
927 
928 	fusb300_clear_int(ep->fusb300, FUSB300_OFFSET_IGR0,
929 		FUSB300_IGR0_EPn_PRD_INT(ep->epnum));
930 	return;
931 
932 IDMA_RESET:
933 	reg = ioread32(ep->fusb300->reg + FUSB300_OFFSET_IGER0);
934 	reg &= ~FUSB300_IGER0_EEPn_PRD_INT(ep->epnum);
935 	iowrite32(reg, ep->fusb300->reg + FUSB300_OFFSET_IGER0);
936 }
937 
938 static void fusb300_set_idma(struct fusb300_ep *ep,
939 			struct fusb300_request *req)
940 {
941 	int ret;
942 
943 	ret = usb_gadget_map_request(&ep->fusb300->gadget,
944 			&req->req, DMA_TO_DEVICE);
945 	if (ret)
946 		return;
947 
948 	fusb300_enable_bit(ep->fusb300, FUSB300_OFFSET_IGER0,
949 		FUSB300_IGER0_EEPn_PRD_INT(ep->epnum));
950 
951 	fusb300_fill_idma_prdtbl(ep, req->req.dma, req->req.length);
952 	/* check idma is done */
953 	fusb300_wait_idma_finished(ep);
954 
955 	usb_gadget_unmap_request(&ep->fusb300->gadget,
956 			&req->req, DMA_TO_DEVICE);
957 }
958 
959 static void in_ep_fifo_handler(struct fusb300_ep *ep)
960 {
961 	struct fusb300_request *req = list_entry(ep->queue.next,
962 					struct fusb300_request, queue);
963 
964 	if (req->req.length)
965 		fusb300_set_idma(ep, req);
966 	done(ep, req, 0);
967 }
968 
969 static void out_ep_fifo_handler(struct fusb300_ep *ep)
970 {
971 	struct fusb300 *fusb300 = ep->fusb300;
972 	struct fusb300_request *req = list_entry(ep->queue.next,
973 						 struct fusb300_request, queue);
974 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPFFR(ep->epnum));
975 	u32 length = reg & FUSB300_FFR_BYCNT;
976 
977 	fusb300_rdfifo(ep, req, length);
978 
979 	/* finish out transfer */
980 	if ((req->req.length == req->req.actual) || (length < ep->ep.maxpacket))
981 		done(ep, req, 0);
982 }
983 
984 static void check_device_mode(struct fusb300 *fusb300)
985 {
986 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_GCR);
987 
988 	switch (reg & FUSB300_GCR_DEVEN_MSK) {
989 	case FUSB300_GCR_DEVEN_SS:
990 		fusb300->gadget.speed = USB_SPEED_SUPER;
991 		break;
992 	case FUSB300_GCR_DEVEN_HS:
993 		fusb300->gadget.speed = USB_SPEED_HIGH;
994 		break;
995 	case FUSB300_GCR_DEVEN_FS:
996 		fusb300->gadget.speed = USB_SPEED_FULL;
997 		break;
998 	default:
999 		fusb300->gadget.speed = USB_SPEED_UNKNOWN;
1000 		break;
1001 	}
1002 	printk(KERN_INFO "dev_mode = %d\n", (reg & FUSB300_GCR_DEVEN_MSK));
1003 }
1004 
1005 
1006 static void fusb300_ep0out(struct fusb300 *fusb300)
1007 {
1008 	struct fusb300_ep *ep = fusb300->ep[0];
1009 	u32 reg;
1010 
1011 	if (!list_empty(&ep->queue)) {
1012 		struct fusb300_request *req;
1013 
1014 		req = list_first_entry(&ep->queue,
1015 			struct fusb300_request, queue);
1016 		if (req->req.length)
1017 			fusb300_rdcxf(ep->fusb300, req->req.buf,
1018 				req->req.length);
1019 		done(ep, req, 0);
1020 		reg = ioread32(fusb300->reg + FUSB300_OFFSET_IGER1);
1021 		reg &= ~FUSB300_IGER1_CX_OUT_INT;
1022 		iowrite32(reg, fusb300->reg + FUSB300_OFFSET_IGER1);
1023 	} else
1024 		pr_err("%s : empty queue\n", __func__);
1025 }
1026 
1027 static void fusb300_ep0in(struct fusb300 *fusb300)
1028 {
1029 	struct fusb300_request *req;
1030 	struct fusb300_ep *ep = fusb300->ep[0];
1031 
1032 	if ((!list_empty(&ep->queue)) && (fusb300->ep0_dir)) {
1033 		req = list_entry(ep->queue.next,
1034 				struct fusb300_request, queue);
1035 		if (req->req.length)
1036 			fusb300_wrcxf(ep, req);
1037 		if ((req->req.length - req->req.actual) < ep->ep.maxpacket)
1038 			done(ep, req, 0);
1039 	} else
1040 		fusb300_set_cxdone(fusb300);
1041 }
1042 
1043 static void fusb300_grp2_handler(void)
1044 {
1045 }
1046 
1047 static void fusb300_grp3_handler(void)
1048 {
1049 }
1050 
1051 static void fusb300_grp4_handler(void)
1052 {
1053 }
1054 
1055 static void fusb300_grp5_handler(void)
1056 {
1057 }
1058 
1059 static irqreturn_t fusb300_irq(int irq, void *_fusb300)
1060 {
1061 	struct fusb300 *fusb300 = _fusb300;
1062 	u32 int_grp1 = ioread32(fusb300->reg + FUSB300_OFFSET_IGR1);
1063 	u32 int_grp1_en = ioread32(fusb300->reg + FUSB300_OFFSET_IGER1);
1064 	u32 int_grp0 = ioread32(fusb300->reg + FUSB300_OFFSET_IGR0);
1065 	u32 int_grp0_en = ioread32(fusb300->reg + FUSB300_OFFSET_IGER0);
1066 	struct usb_ctrlrequest ctrl;
1067 	u8 in;
1068 	u32 reg;
1069 	int i;
1070 
1071 	spin_lock(&fusb300->lock);
1072 
1073 	int_grp1 &= int_grp1_en;
1074 	int_grp0 &= int_grp0_en;
1075 
1076 	if (int_grp1 & FUSB300_IGR1_WARM_RST_INT) {
1077 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1078 				  FUSB300_IGR1_WARM_RST_INT);
1079 		printk(KERN_INFO"fusb300_warmreset\n");
1080 		fusb300_reset();
1081 	}
1082 
1083 	if (int_grp1 & FUSB300_IGR1_HOT_RST_INT) {
1084 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1085 				  FUSB300_IGR1_HOT_RST_INT);
1086 		printk(KERN_INFO"fusb300_hotreset\n");
1087 		fusb300_reset();
1088 	}
1089 
1090 	if (int_grp1 & FUSB300_IGR1_USBRST_INT) {
1091 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1092 				  FUSB300_IGR1_USBRST_INT);
1093 		fusb300_reset();
1094 	}
1095 	/* COMABT_INT has a highest priority */
1096 
1097 	if (int_grp1 & FUSB300_IGR1_CX_COMABT_INT) {
1098 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1099 				  FUSB300_IGR1_CX_COMABT_INT);
1100 		printk(KERN_INFO"fusb300_ep0abt\n");
1101 	}
1102 
1103 	if (int_grp1 & FUSB300_IGR1_VBUS_CHG_INT) {
1104 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1105 				  FUSB300_IGR1_VBUS_CHG_INT);
1106 		printk(KERN_INFO"fusb300_vbus_change\n");
1107 	}
1108 
1109 	if (int_grp1 & FUSB300_IGR1_U3_EXIT_FAIL_INT) {
1110 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1111 				  FUSB300_IGR1_U3_EXIT_FAIL_INT);
1112 	}
1113 
1114 	if (int_grp1 & FUSB300_IGR1_U2_EXIT_FAIL_INT) {
1115 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1116 				  FUSB300_IGR1_U2_EXIT_FAIL_INT);
1117 	}
1118 
1119 	if (int_grp1 & FUSB300_IGR1_U1_EXIT_FAIL_INT) {
1120 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1121 				  FUSB300_IGR1_U1_EXIT_FAIL_INT);
1122 	}
1123 
1124 	if (int_grp1 & FUSB300_IGR1_U2_ENTRY_FAIL_INT) {
1125 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1126 				  FUSB300_IGR1_U2_ENTRY_FAIL_INT);
1127 	}
1128 
1129 	if (int_grp1 & FUSB300_IGR1_U1_ENTRY_FAIL_INT) {
1130 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1131 				  FUSB300_IGR1_U1_ENTRY_FAIL_INT);
1132 	}
1133 
1134 	if (int_grp1 & FUSB300_IGR1_U3_EXIT_INT) {
1135 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1136 				  FUSB300_IGR1_U3_EXIT_INT);
1137 		printk(KERN_INFO "FUSB300_IGR1_U3_EXIT_INT\n");
1138 	}
1139 
1140 	if (int_grp1 & FUSB300_IGR1_U2_EXIT_INT) {
1141 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1142 				  FUSB300_IGR1_U2_EXIT_INT);
1143 		printk(KERN_INFO "FUSB300_IGR1_U2_EXIT_INT\n");
1144 	}
1145 
1146 	if (int_grp1 & FUSB300_IGR1_U1_EXIT_INT) {
1147 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1148 				  FUSB300_IGR1_U1_EXIT_INT);
1149 		printk(KERN_INFO "FUSB300_IGR1_U1_EXIT_INT\n");
1150 	}
1151 
1152 	if (int_grp1 & FUSB300_IGR1_U3_ENTRY_INT) {
1153 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1154 				  FUSB300_IGR1_U3_ENTRY_INT);
1155 		printk(KERN_INFO "FUSB300_IGR1_U3_ENTRY_INT\n");
1156 		fusb300_enable_bit(fusb300, FUSB300_OFFSET_SSCR1,
1157 				   FUSB300_SSCR1_GO_U3_DONE);
1158 	}
1159 
1160 	if (int_grp1 & FUSB300_IGR1_U2_ENTRY_INT) {
1161 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1162 				  FUSB300_IGR1_U2_ENTRY_INT);
1163 		printk(KERN_INFO "FUSB300_IGR1_U2_ENTRY_INT\n");
1164 	}
1165 
1166 	if (int_grp1 & FUSB300_IGR1_U1_ENTRY_INT) {
1167 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1168 				  FUSB300_IGR1_U1_ENTRY_INT);
1169 		printk(KERN_INFO "FUSB300_IGR1_U1_ENTRY_INT\n");
1170 	}
1171 
1172 	if (int_grp1 & FUSB300_IGR1_RESM_INT) {
1173 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1174 				  FUSB300_IGR1_RESM_INT);
1175 		printk(KERN_INFO "fusb300_resume\n");
1176 	}
1177 
1178 	if (int_grp1 & FUSB300_IGR1_SUSP_INT) {
1179 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1180 				  FUSB300_IGR1_SUSP_INT);
1181 		printk(KERN_INFO "fusb300_suspend\n");
1182 	}
1183 
1184 	if (int_grp1 & FUSB300_IGR1_HS_LPM_INT) {
1185 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1186 				  FUSB300_IGR1_HS_LPM_INT);
1187 		printk(KERN_INFO "fusb300_HS_LPM_INT\n");
1188 	}
1189 
1190 	if (int_grp1 & FUSB300_IGR1_DEV_MODE_CHG_INT) {
1191 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1192 				  FUSB300_IGR1_DEV_MODE_CHG_INT);
1193 		check_device_mode(fusb300);
1194 	}
1195 
1196 	if (int_grp1 & FUSB300_IGR1_CX_COMFAIL_INT) {
1197 		fusb300_set_cxstall(fusb300);
1198 		printk(KERN_INFO "fusb300_ep0fail\n");
1199 	}
1200 
1201 	if (int_grp1 & FUSB300_IGR1_CX_SETUP_INT) {
1202 		printk(KERN_INFO "fusb300_ep0setup\n");
1203 		if (setup_packet(fusb300, &ctrl)) {
1204 			spin_unlock(&fusb300->lock);
1205 			if (fusb300->driver->setup(&fusb300->gadget, &ctrl) < 0)
1206 				fusb300_set_cxstall(fusb300);
1207 			spin_lock(&fusb300->lock);
1208 		}
1209 	}
1210 
1211 	if (int_grp1 & FUSB300_IGR1_CX_CMDEND_INT)
1212 		printk(KERN_INFO "fusb300_cmdend\n");
1213 
1214 
1215 	if (int_grp1 & FUSB300_IGR1_CX_OUT_INT) {
1216 		printk(KERN_INFO "fusb300_cxout\n");
1217 		fusb300_ep0out(fusb300);
1218 	}
1219 
1220 	if (int_grp1 & FUSB300_IGR1_CX_IN_INT) {
1221 		printk(KERN_INFO "fusb300_cxin\n");
1222 		fusb300_ep0in(fusb300);
1223 	}
1224 
1225 	if (int_grp1 & FUSB300_IGR1_INTGRP5)
1226 		fusb300_grp5_handler();
1227 
1228 	if (int_grp1 & FUSB300_IGR1_INTGRP4)
1229 		fusb300_grp4_handler();
1230 
1231 	if (int_grp1 & FUSB300_IGR1_INTGRP3)
1232 		fusb300_grp3_handler();
1233 
1234 	if (int_grp1 & FUSB300_IGR1_INTGRP2)
1235 		fusb300_grp2_handler();
1236 
1237 	if (int_grp0) {
1238 		for (i = 1; i < FUSB300_MAX_NUM_EP; i++) {
1239 			if (int_grp0 & FUSB300_IGR0_EPn_FIFO_INT(i)) {
1240 				reg = ioread32(fusb300->reg +
1241 					FUSB300_OFFSET_EPSET1(i));
1242 				in = (reg & FUSB300_EPSET1_DIRIN) ? 1 : 0;
1243 				if (in)
1244 					in_ep_fifo_handler(fusb300->ep[i]);
1245 				else
1246 					out_ep_fifo_handler(fusb300->ep[i]);
1247 			}
1248 		}
1249 	}
1250 
1251 	spin_unlock(&fusb300->lock);
1252 
1253 	return IRQ_HANDLED;
1254 }
1255 
1256 static void fusb300_set_u2_timeout(struct fusb300 *fusb300,
1257 				   u32 time)
1258 {
1259 	u32 reg;
1260 
1261 	reg = ioread32(fusb300->reg + FUSB300_OFFSET_TT);
1262 	reg &= ~0xff;
1263 	reg |= FUSB300_SSCR2_U2TIMEOUT(time);
1264 
1265 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_TT);
1266 }
1267 
1268 static void fusb300_set_u1_timeout(struct fusb300 *fusb300,
1269 				   u32 time)
1270 {
1271 	u32 reg;
1272 
1273 	reg = ioread32(fusb300->reg + FUSB300_OFFSET_TT);
1274 	reg &= ~(0xff << 8);
1275 	reg |= FUSB300_SSCR2_U1TIMEOUT(time);
1276 
1277 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_TT);
1278 }
1279 
1280 static void init_controller(struct fusb300 *fusb300)
1281 {
1282 	u32 reg;
1283 	u32 mask = 0;
1284 	u32 val = 0;
1285 
1286 	/* split on */
1287 	mask = val = FUSB300_AHBBCR_S0_SPLIT_ON | FUSB300_AHBBCR_S1_SPLIT_ON;
1288 	reg = ioread32(fusb300->reg + FUSB300_OFFSET_AHBCR);
1289 	reg &= ~mask;
1290 	reg |= val;
1291 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_AHBCR);
1292 
1293 	/* enable high-speed LPM */
1294 	mask = val = FUSB300_HSCR_HS_LPM_PERMIT;
1295 	reg = ioread32(fusb300->reg + FUSB300_OFFSET_HSCR);
1296 	reg &= ~mask;
1297 	reg |= val;
1298 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_HSCR);
1299 
1300 	/*set u1 u2 timer*/
1301 	fusb300_set_u2_timeout(fusb300, 0xff);
1302 	fusb300_set_u1_timeout(fusb300, 0xff);
1303 
1304 	/* enable all grp1 interrupt */
1305 	iowrite32(0xcfffff9f, fusb300->reg + FUSB300_OFFSET_IGER1);
1306 }
1307 /*------------------------------------------------------------------------*/
1308 static int fusb300_udc_start(struct usb_gadget *g,
1309 		struct usb_gadget_driver *driver)
1310 {
1311 	struct fusb300 *fusb300 = to_fusb300(g);
1312 
1313 	/* hook up the driver */
1314 	fusb300->driver = driver;
1315 
1316 	return 0;
1317 }
1318 
1319 static int fusb300_udc_stop(struct usb_gadget *g)
1320 {
1321 	struct fusb300 *fusb300 = to_fusb300(g);
1322 
1323 	init_controller(fusb300);
1324 	fusb300->driver = NULL;
1325 
1326 	return 0;
1327 }
1328 /*--------------------------------------------------------------------------*/
1329 
1330 static int fusb300_udc_pullup(struct usb_gadget *_gadget, int is_active)
1331 {
1332 	return 0;
1333 }
1334 
1335 static const struct usb_gadget_ops fusb300_gadget_ops = {
1336 	.pullup		= fusb300_udc_pullup,
1337 	.udc_start	= fusb300_udc_start,
1338 	.udc_stop	= fusb300_udc_stop,
1339 };
1340 
1341 static void fusb300_remove(struct platform_device *pdev)
1342 {
1343 	struct fusb300 *fusb300 = platform_get_drvdata(pdev);
1344 	int i;
1345 
1346 	usb_del_gadget_udc(&fusb300->gadget);
1347 	iounmap(fusb300->reg);
1348 	free_irq(platform_get_irq(pdev, 0), fusb300);
1349 	free_irq(platform_get_irq(pdev, 1), fusb300);
1350 
1351 	fusb300_free_request(&fusb300->ep[0]->ep, fusb300->ep0_req);
1352 	for (i = 0; i < FUSB300_MAX_NUM_EP; i++)
1353 		kfree(fusb300->ep[i]);
1354 	kfree(fusb300);
1355 }
1356 
1357 static int fusb300_probe(struct platform_device *pdev)
1358 {
1359 	struct resource *res, *ires, *ires1;
1360 	void __iomem *reg = NULL;
1361 	struct fusb300 *fusb300 = NULL;
1362 	struct fusb300_ep *_ep[FUSB300_MAX_NUM_EP];
1363 	int ret = 0;
1364 	int i;
1365 
1366 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1367 	if (!res) {
1368 		ret = -ENODEV;
1369 		pr_err("platform_get_resource error.\n");
1370 		goto clean_up;
1371 	}
1372 
1373 	ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1374 	if (!ires) {
1375 		ret = -ENODEV;
1376 		dev_err(&pdev->dev,
1377 			"platform_get_resource IORESOURCE_IRQ error.\n");
1378 		goto clean_up;
1379 	}
1380 
1381 	ires1 = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
1382 	if (!ires1) {
1383 		ret = -ENODEV;
1384 		dev_err(&pdev->dev,
1385 			"platform_get_resource IORESOURCE_IRQ 1 error.\n");
1386 		goto clean_up;
1387 	}
1388 
1389 	reg = ioremap(res->start, resource_size(res));
1390 	if (reg == NULL) {
1391 		ret = -ENOMEM;
1392 		pr_err("ioremap error.\n");
1393 		goto clean_up;
1394 	}
1395 
1396 	/* initialize udc */
1397 	fusb300 = kzalloc(sizeof(struct fusb300), GFP_KERNEL);
1398 	if (fusb300 == NULL) {
1399 		ret = -ENOMEM;
1400 		goto clean_up;
1401 	}
1402 
1403 	for (i = 0; i < FUSB300_MAX_NUM_EP; i++) {
1404 		_ep[i] = kzalloc(sizeof(struct fusb300_ep), GFP_KERNEL);
1405 		if (_ep[i] == NULL) {
1406 			ret = -ENOMEM;
1407 			goto clean_up;
1408 		}
1409 		fusb300->ep[i] = _ep[i];
1410 	}
1411 
1412 	spin_lock_init(&fusb300->lock);
1413 
1414 	platform_set_drvdata(pdev, fusb300);
1415 
1416 	fusb300->gadget.ops = &fusb300_gadget_ops;
1417 
1418 	fusb300->gadget.max_speed = USB_SPEED_HIGH;
1419 	fusb300->gadget.name = udc_name;
1420 	fusb300->reg = reg;
1421 
1422 	ret = request_irq(ires->start, fusb300_irq, IRQF_SHARED,
1423 			  udc_name, fusb300);
1424 	if (ret < 0) {
1425 		pr_err("request_irq error (%d)\n", ret);
1426 		goto clean_up;
1427 	}
1428 
1429 	ret = request_irq(ires1->start, fusb300_irq,
1430 			IRQF_SHARED, udc_name, fusb300);
1431 	if (ret < 0) {
1432 		pr_err("request_irq1 error (%d)\n", ret);
1433 		goto err_request_irq1;
1434 	}
1435 
1436 	INIT_LIST_HEAD(&fusb300->gadget.ep_list);
1437 
1438 	for (i = 0; i < FUSB300_MAX_NUM_EP ; i++) {
1439 		struct fusb300_ep *ep = fusb300->ep[i];
1440 
1441 		if (i != 0) {
1442 			INIT_LIST_HEAD(&fusb300->ep[i]->ep.ep_list);
1443 			list_add_tail(&fusb300->ep[i]->ep.ep_list,
1444 				     &fusb300->gadget.ep_list);
1445 		}
1446 		ep->fusb300 = fusb300;
1447 		INIT_LIST_HEAD(&ep->queue);
1448 		ep->ep.name = fusb300_ep_name[i];
1449 		ep->ep.ops = &fusb300_ep_ops;
1450 		usb_ep_set_maxpacket_limit(&ep->ep, HS_BULK_MAX_PACKET_SIZE);
1451 
1452 		if (i == 0) {
1453 			ep->ep.caps.type_control = true;
1454 		} else {
1455 			ep->ep.caps.type_iso = true;
1456 			ep->ep.caps.type_bulk = true;
1457 			ep->ep.caps.type_int = true;
1458 		}
1459 
1460 		ep->ep.caps.dir_in = true;
1461 		ep->ep.caps.dir_out = true;
1462 	}
1463 	usb_ep_set_maxpacket_limit(&fusb300->ep[0]->ep, HS_CTL_MAX_PACKET_SIZE);
1464 	fusb300->ep[0]->epnum = 0;
1465 	fusb300->gadget.ep0 = &fusb300->ep[0]->ep;
1466 	INIT_LIST_HEAD(&fusb300->gadget.ep0->ep_list);
1467 
1468 	fusb300->ep0_req = fusb300_alloc_request(&fusb300->ep[0]->ep,
1469 				GFP_KERNEL);
1470 	if (fusb300->ep0_req == NULL) {
1471 		ret = -ENOMEM;
1472 		goto err_alloc_request;
1473 	}
1474 
1475 	init_controller(fusb300);
1476 	ret = usb_add_gadget_udc(&pdev->dev, &fusb300->gadget);
1477 	if (ret)
1478 		goto err_add_udc;
1479 
1480 	dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
1481 
1482 	return 0;
1483 
1484 err_add_udc:
1485 	fusb300_free_request(&fusb300->ep[0]->ep, fusb300->ep0_req);
1486 
1487 err_alloc_request:
1488 	free_irq(ires1->start, fusb300);
1489 
1490 err_request_irq1:
1491 	free_irq(ires->start, fusb300);
1492 
1493 clean_up:
1494 	if (fusb300) {
1495 		if (fusb300->ep0_req)
1496 			fusb300_free_request(&fusb300->ep[0]->ep,
1497 				fusb300->ep0_req);
1498 		for (i = 0; i < FUSB300_MAX_NUM_EP; i++)
1499 			kfree(fusb300->ep[i]);
1500 		kfree(fusb300);
1501 	}
1502 	if (reg)
1503 		iounmap(reg);
1504 
1505 	return ret;
1506 }
1507 
1508 static struct platform_driver fusb300_driver = {
1509 	.probe = fusb300_probe,
1510 	.remove = fusb300_remove,
1511 	.driver = {
1512 		.name =	udc_name,
1513 	},
1514 };
1515 
1516 module_platform_driver(fusb300_driver);
1517