1 /*
2  * Fusb300 UDC (USB gadget)
3  *
4  * Copyright (C) 2010 Faraday Technology Corp.
5  *
6  * Author : Yuan-hsin Chen <yhchen@faraday-tech.com>
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; version 2 of the License.
11  */
12 #include <linux/dma-mapping.h>
13 #include <linux/err.h>
14 #include <linux/interrupt.h>
15 #include <linux/io.h>
16 #include <linux/module.h>
17 #include <linux/platform_device.h>
18 #include <linux/usb/ch9.h>
19 #include <linux/usb/gadget.h>
20 
21 #include "fusb300_udc.h"
22 
23 MODULE_DESCRIPTION("FUSB300  USB gadget driver");
24 MODULE_LICENSE("GPL");
25 MODULE_AUTHOR("Yuan-Hsin Chen, Feng-Hsin Chiang <john453@faraday-tech.com>");
26 MODULE_ALIAS("platform:fusb300_udc");
27 
28 #define DRIVER_VERSION	"20 October 2010"
29 
30 static const char udc_name[] = "fusb300_udc";
31 static const char * const fusb300_ep_name[] = {
32 	"ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7", "ep8", "ep9",
33 	"ep10", "ep11", "ep12", "ep13", "ep14", "ep15"
34 };
35 
36 static void done(struct fusb300_ep *ep, struct fusb300_request *req,
37 		 int status);
38 
39 static void fusb300_enable_bit(struct fusb300 *fusb300, u32 offset,
40 			       u32 value)
41 {
42 	u32 reg = ioread32(fusb300->reg + offset);
43 
44 	reg |= value;
45 	iowrite32(reg, fusb300->reg + offset);
46 }
47 
48 static void fusb300_disable_bit(struct fusb300 *fusb300, u32 offset,
49 				u32 value)
50 {
51 	u32 reg = ioread32(fusb300->reg + offset);
52 
53 	reg &= ~value;
54 	iowrite32(reg, fusb300->reg + offset);
55 }
56 
57 
58 static void fusb300_ep_setting(struct fusb300_ep *ep,
59 			       struct fusb300_ep_info info)
60 {
61 	ep->epnum = info.epnum;
62 	ep->type = info.type;
63 }
64 
65 static int fusb300_ep_release(struct fusb300_ep *ep)
66 {
67 	if (!ep->epnum)
68 		return 0;
69 	ep->epnum = 0;
70 	ep->stall = 0;
71 	ep->wedged = 0;
72 	return 0;
73 }
74 
75 static void fusb300_set_fifo_entry(struct fusb300 *fusb300,
76 				   u32 ep)
77 {
78 	u32 val = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
79 
80 	val &= ~FUSB300_EPSET1_FIFOENTRY_MSK;
81 	val |= FUSB300_EPSET1_FIFOENTRY(FUSB300_FIFO_ENTRY_NUM);
82 	iowrite32(val, fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
83 }
84 
85 static void fusb300_set_start_entry(struct fusb300 *fusb300,
86 				    u8 ep)
87 {
88 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
89 	u32 start_entry = fusb300->fifo_entry_num * FUSB300_FIFO_ENTRY_NUM;
90 
91 	reg &= ~FUSB300_EPSET1_START_ENTRY_MSK	;
92 	reg |= FUSB300_EPSET1_START_ENTRY(start_entry);
93 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
94 	if (fusb300->fifo_entry_num == FUSB300_MAX_FIFO_ENTRY) {
95 		fusb300->fifo_entry_num = 0;
96 		fusb300->addrofs = 0;
97 		pr_err("fifo entry is over the maximum number!\n");
98 	} else
99 		fusb300->fifo_entry_num++;
100 }
101 
102 /* set fusb300_set_start_entry first before fusb300_set_epaddrofs */
103 static void fusb300_set_epaddrofs(struct fusb300 *fusb300,
104 				  struct fusb300_ep_info info)
105 {
106 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
107 
108 	reg &= ~FUSB300_EPSET2_ADDROFS_MSK;
109 	reg |= FUSB300_EPSET2_ADDROFS(fusb300->addrofs);
110 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
111 	fusb300->addrofs += (info.maxpacket + 7) / 8 * FUSB300_FIFO_ENTRY_NUM;
112 }
113 
114 static void ep_fifo_setting(struct fusb300 *fusb300,
115 			    struct fusb300_ep_info info)
116 {
117 	fusb300_set_fifo_entry(fusb300, info.epnum);
118 	fusb300_set_start_entry(fusb300, info.epnum);
119 	fusb300_set_epaddrofs(fusb300, info);
120 }
121 
122 static void fusb300_set_eptype(struct fusb300 *fusb300,
123 			       struct fusb300_ep_info info)
124 {
125 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
126 
127 	reg &= ~FUSB300_EPSET1_TYPE_MSK;
128 	reg |= FUSB300_EPSET1_TYPE(info.type);
129 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
130 }
131 
132 static void fusb300_set_epdir(struct fusb300 *fusb300,
133 			      struct fusb300_ep_info info)
134 {
135 	u32 reg;
136 
137 	if (!info.dir_in)
138 		return;
139 	reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
140 	reg &= ~FUSB300_EPSET1_DIR_MSK;
141 	reg |= FUSB300_EPSET1_DIRIN;
142 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
143 }
144 
145 static void fusb300_set_ep_active(struct fusb300 *fusb300,
146 			  u8 ep)
147 {
148 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
149 
150 	reg |= FUSB300_EPSET1_ACTEN;
151 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(ep));
152 }
153 
154 static void fusb300_set_epmps(struct fusb300 *fusb300,
155 			      struct fusb300_ep_info info)
156 {
157 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
158 
159 	reg &= ~FUSB300_EPSET2_MPS_MSK;
160 	reg |= FUSB300_EPSET2_MPS(info.maxpacket);
161 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET2(info.epnum));
162 }
163 
164 static void fusb300_set_interval(struct fusb300 *fusb300,
165 				 struct fusb300_ep_info info)
166 {
167 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
168 
169 	reg &= ~FUSB300_EPSET1_INTERVAL(0x7);
170 	reg |= FUSB300_EPSET1_INTERVAL(info.interval);
171 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
172 }
173 
174 static void fusb300_set_bwnum(struct fusb300 *fusb300,
175 			      struct fusb300_ep_info info)
176 {
177 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
178 
179 	reg &= ~FUSB300_EPSET1_BWNUM(0x3);
180 	reg |= FUSB300_EPSET1_BWNUM(info.bw_num);
181 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET1(info.epnum));
182 }
183 
184 static void set_ep_reg(struct fusb300 *fusb300,
185 		      struct fusb300_ep_info info)
186 {
187 	fusb300_set_eptype(fusb300, info);
188 	fusb300_set_epdir(fusb300, info);
189 	fusb300_set_epmps(fusb300, info);
190 
191 	if (info.interval)
192 		fusb300_set_interval(fusb300, info);
193 
194 	if (info.bw_num)
195 		fusb300_set_bwnum(fusb300, info);
196 
197 	fusb300_set_ep_active(fusb300, info.epnum);
198 }
199 
200 static int config_ep(struct fusb300_ep *ep,
201 		     const struct usb_endpoint_descriptor *desc)
202 {
203 	struct fusb300 *fusb300 = ep->fusb300;
204 	struct fusb300_ep_info info;
205 
206 	ep->ep.desc = desc;
207 
208 	info.interval = 0;
209 	info.addrofs = 0;
210 	info.bw_num = 0;
211 
212 	info.type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
213 	info.dir_in = (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ? 1 : 0;
214 	info.maxpacket = usb_endpoint_maxp(desc);
215 	info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
216 
217 	if ((info.type == USB_ENDPOINT_XFER_INT) ||
218 	   (info.type == USB_ENDPOINT_XFER_ISOC)) {
219 		info.interval = desc->bInterval;
220 		if (info.type == USB_ENDPOINT_XFER_ISOC)
221 			info.bw_num = ((desc->wMaxPacketSize & 0x1800) >> 11);
222 	}
223 
224 	ep_fifo_setting(fusb300, info);
225 
226 	set_ep_reg(fusb300, info);
227 
228 	fusb300_ep_setting(ep, info);
229 
230 	fusb300->ep[info.epnum] = ep;
231 
232 	return 0;
233 }
234 
235 static int fusb300_enable(struct usb_ep *_ep,
236 			  const struct usb_endpoint_descriptor *desc)
237 {
238 	struct fusb300_ep *ep;
239 
240 	ep = container_of(_ep, struct fusb300_ep, ep);
241 
242 	if (ep->fusb300->reenum) {
243 		ep->fusb300->fifo_entry_num = 0;
244 		ep->fusb300->addrofs = 0;
245 		ep->fusb300->reenum = 0;
246 	}
247 
248 	return config_ep(ep, desc);
249 }
250 
251 static int fusb300_disable(struct usb_ep *_ep)
252 {
253 	struct fusb300_ep *ep;
254 	struct fusb300_request *req;
255 	unsigned long flags;
256 
257 	ep = container_of(_ep, struct fusb300_ep, ep);
258 
259 	BUG_ON(!ep);
260 
261 	while (!list_empty(&ep->queue)) {
262 		req = list_entry(ep->queue.next, struct fusb300_request, queue);
263 		spin_lock_irqsave(&ep->fusb300->lock, flags);
264 		done(ep, req, -ECONNRESET);
265 		spin_unlock_irqrestore(&ep->fusb300->lock, flags);
266 	}
267 
268 	return fusb300_ep_release(ep);
269 }
270 
271 static struct usb_request *fusb300_alloc_request(struct usb_ep *_ep,
272 						gfp_t gfp_flags)
273 {
274 	struct fusb300_request *req;
275 
276 	req = kzalloc(sizeof(struct fusb300_request), gfp_flags);
277 	if (!req)
278 		return NULL;
279 	INIT_LIST_HEAD(&req->queue);
280 
281 	return &req->req;
282 }
283 
284 static void fusb300_free_request(struct usb_ep *_ep, struct usb_request *_req)
285 {
286 	struct fusb300_request *req;
287 
288 	req = container_of(_req, struct fusb300_request, req);
289 	kfree(req);
290 }
291 
292 static int enable_fifo_int(struct fusb300_ep *ep)
293 {
294 	struct fusb300 *fusb300 = ep->fusb300;
295 
296 	if (ep->epnum) {
297 		fusb300_enable_bit(fusb300, FUSB300_OFFSET_IGER0,
298 			FUSB300_IGER0_EEPn_FIFO_INT(ep->epnum));
299 	} else {
300 		pr_err("can't enable_fifo_int ep0\n");
301 		return -EINVAL;
302 	}
303 
304 	return 0;
305 }
306 
307 static int disable_fifo_int(struct fusb300_ep *ep)
308 {
309 	struct fusb300 *fusb300 = ep->fusb300;
310 
311 	if (ep->epnum) {
312 		fusb300_disable_bit(fusb300, FUSB300_OFFSET_IGER0,
313 			FUSB300_IGER0_EEPn_FIFO_INT(ep->epnum));
314 	} else {
315 		pr_err("can't disable_fifo_int ep0\n");
316 		return -EINVAL;
317 	}
318 
319 	return 0;
320 }
321 
322 static void fusb300_set_cxlen(struct fusb300 *fusb300, u32 length)
323 {
324 	u32 reg;
325 
326 	reg = ioread32(fusb300->reg + FUSB300_OFFSET_CSR);
327 	reg &= ~FUSB300_CSR_LEN_MSK;
328 	reg |= FUSB300_CSR_LEN(length);
329 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_CSR);
330 }
331 
332 /* write data to cx fifo */
333 static void fusb300_wrcxf(struct fusb300_ep *ep,
334 		   struct fusb300_request *req)
335 {
336 	int i = 0;
337 	u8 *tmp;
338 	u32 data;
339 	struct fusb300 *fusb300 = ep->fusb300;
340 	u32 length = req->req.length - req->req.actual;
341 
342 	tmp = req->req.buf + req->req.actual;
343 
344 	if (length > SS_CTL_MAX_PACKET_SIZE) {
345 		fusb300_set_cxlen(fusb300, SS_CTL_MAX_PACKET_SIZE);
346 		for (i = (SS_CTL_MAX_PACKET_SIZE >> 2); i > 0; i--) {
347 			data = *tmp | *(tmp + 1) << 8 | *(tmp + 2) << 16 |
348 				*(tmp + 3) << 24;
349 			iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
350 			tmp += 4;
351 		}
352 		req->req.actual += SS_CTL_MAX_PACKET_SIZE;
353 	} else { /* length is less than max packet size */
354 		fusb300_set_cxlen(fusb300, length);
355 		for (i = length >> 2; i > 0; i--) {
356 			data = *tmp | *(tmp + 1) << 8 | *(tmp + 2) << 16 |
357 				*(tmp + 3) << 24;
358 			printk(KERN_DEBUG "    0x%x\n", data);
359 			iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
360 			tmp = tmp + 4;
361 		}
362 		switch (length % 4) {
363 		case 1:
364 			data = *tmp;
365 			printk(KERN_DEBUG "    0x%x\n", data);
366 			iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
367 			break;
368 		case 2:
369 			data = *tmp | *(tmp + 1) << 8;
370 			printk(KERN_DEBUG "    0x%x\n", data);
371 			iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
372 			break;
373 		case 3:
374 			data = *tmp | *(tmp + 1) << 8 | *(tmp + 2) << 16;
375 			printk(KERN_DEBUG "    0x%x\n", data);
376 			iowrite32(data, fusb300->reg + FUSB300_OFFSET_CXPORT);
377 			break;
378 		default:
379 			break;
380 		}
381 		req->req.actual += length;
382 	}
383 }
384 
385 static void fusb300_set_epnstall(struct fusb300 *fusb300, u8 ep)
386 {
387 	fusb300_enable_bit(fusb300, FUSB300_OFFSET_EPSET0(ep),
388 		FUSB300_EPSET0_STL);
389 }
390 
391 static void fusb300_clear_epnstall(struct fusb300 *fusb300, u8 ep)
392 {
393 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET0(ep));
394 
395 	if (reg & FUSB300_EPSET0_STL) {
396 		printk(KERN_DEBUG "EP%d stall... Clear!!\n", ep);
397 		reg |= FUSB300_EPSET0_STL_CLR;
398 		iowrite32(reg, fusb300->reg + FUSB300_OFFSET_EPSET0(ep));
399 	}
400 }
401 
402 static void ep0_queue(struct fusb300_ep *ep, struct fusb300_request *req)
403 {
404 	if (ep->fusb300->ep0_dir) { /* if IN */
405 		if (req->req.length) {
406 			fusb300_wrcxf(ep, req);
407 		} else
408 			printk(KERN_DEBUG "%s : req->req.length = 0x%x\n",
409 				__func__, req->req.length);
410 		if ((req->req.length == req->req.actual) ||
411 		    (req->req.actual < ep->ep.maxpacket))
412 			done(ep, req, 0);
413 	} else { /* OUT */
414 		if (!req->req.length)
415 			done(ep, req, 0);
416 		else
417 			fusb300_enable_bit(ep->fusb300, FUSB300_OFFSET_IGER1,
418 				FUSB300_IGER1_CX_OUT_INT);
419 	}
420 }
421 
422 static int fusb300_queue(struct usb_ep *_ep, struct usb_request *_req,
423 			 gfp_t gfp_flags)
424 {
425 	struct fusb300_ep *ep;
426 	struct fusb300_request *req;
427 	unsigned long flags;
428 	int request  = 0;
429 
430 	ep = container_of(_ep, struct fusb300_ep, ep);
431 	req = container_of(_req, struct fusb300_request, req);
432 
433 	if (ep->fusb300->gadget.speed == USB_SPEED_UNKNOWN)
434 		return -ESHUTDOWN;
435 
436 	spin_lock_irqsave(&ep->fusb300->lock, flags);
437 
438 	if (list_empty(&ep->queue))
439 		request = 1;
440 
441 	list_add_tail(&req->queue, &ep->queue);
442 
443 	req->req.actual = 0;
444 	req->req.status = -EINPROGRESS;
445 
446 	if (ep->ep.desc == NULL) /* ep0 */
447 		ep0_queue(ep, req);
448 	else if (request && !ep->stall)
449 		enable_fifo_int(ep);
450 
451 	spin_unlock_irqrestore(&ep->fusb300->lock, flags);
452 
453 	return 0;
454 }
455 
456 static int fusb300_dequeue(struct usb_ep *_ep, struct usb_request *_req)
457 {
458 	struct fusb300_ep *ep;
459 	struct fusb300_request *req;
460 	unsigned long flags;
461 
462 	ep = container_of(_ep, struct fusb300_ep, ep);
463 	req = container_of(_req, struct fusb300_request, req);
464 
465 	spin_lock_irqsave(&ep->fusb300->lock, flags);
466 	if (!list_empty(&ep->queue))
467 		done(ep, req, -ECONNRESET);
468 	spin_unlock_irqrestore(&ep->fusb300->lock, flags);
469 
470 	return 0;
471 }
472 
473 static int fusb300_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedge)
474 {
475 	struct fusb300_ep *ep;
476 	struct fusb300 *fusb300;
477 	unsigned long flags;
478 	int ret = 0;
479 
480 	ep = container_of(_ep, struct fusb300_ep, ep);
481 
482 	fusb300 = ep->fusb300;
483 
484 	spin_lock_irqsave(&ep->fusb300->lock, flags);
485 
486 	if (!list_empty(&ep->queue)) {
487 		ret = -EAGAIN;
488 		goto out;
489 	}
490 
491 	if (value) {
492 		fusb300_set_epnstall(fusb300, ep->epnum);
493 		ep->stall = 1;
494 		if (wedge)
495 			ep->wedged = 1;
496 	} else {
497 		fusb300_clear_epnstall(fusb300, ep->epnum);
498 		ep->stall = 0;
499 		ep->wedged = 0;
500 	}
501 
502 out:
503 	spin_unlock_irqrestore(&ep->fusb300->lock, flags);
504 	return ret;
505 }
506 
507 static int fusb300_set_halt(struct usb_ep *_ep, int value)
508 {
509 	return fusb300_set_halt_and_wedge(_ep, value, 0);
510 }
511 
512 static int fusb300_set_wedge(struct usb_ep *_ep)
513 {
514 	return fusb300_set_halt_and_wedge(_ep, 1, 1);
515 }
516 
517 static void fusb300_fifo_flush(struct usb_ep *_ep)
518 {
519 }
520 
521 static struct usb_ep_ops fusb300_ep_ops = {
522 	.enable		= fusb300_enable,
523 	.disable	= fusb300_disable,
524 
525 	.alloc_request	= fusb300_alloc_request,
526 	.free_request	= fusb300_free_request,
527 
528 	.queue		= fusb300_queue,
529 	.dequeue	= fusb300_dequeue,
530 
531 	.set_halt	= fusb300_set_halt,
532 	.fifo_flush	= fusb300_fifo_flush,
533 	.set_wedge	= fusb300_set_wedge,
534 };
535 
536 /*****************************************************************************/
537 static void fusb300_clear_int(struct fusb300 *fusb300, u32 offset,
538 		       u32 value)
539 {
540 	iowrite32(value, fusb300->reg + offset);
541 }
542 
543 static void fusb300_reset(void)
544 {
545 }
546 
547 static void fusb300_set_cxstall(struct fusb300 *fusb300)
548 {
549 	fusb300_enable_bit(fusb300, FUSB300_OFFSET_CSR,
550 			   FUSB300_CSR_STL);
551 }
552 
553 static void fusb300_set_cxdone(struct fusb300 *fusb300)
554 {
555 	fusb300_enable_bit(fusb300, FUSB300_OFFSET_CSR,
556 			   FUSB300_CSR_DONE);
557 }
558 
559 /* read data from cx fifo */
560 static void fusb300_rdcxf(struct fusb300 *fusb300,
561 		   u8 *buffer, u32 length)
562 {
563 	int i = 0;
564 	u8 *tmp;
565 	u32 data;
566 
567 	tmp = buffer;
568 
569 	for (i = (length >> 2); i > 0; i--) {
570 		data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
571 		printk(KERN_DEBUG "    0x%x\n", data);
572 		*tmp = data & 0xFF;
573 		*(tmp + 1) = (data >> 8) & 0xFF;
574 		*(tmp + 2) = (data >> 16) & 0xFF;
575 		*(tmp + 3) = (data >> 24) & 0xFF;
576 		tmp = tmp + 4;
577 	}
578 
579 	switch (length % 4) {
580 	case 1:
581 		data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
582 		printk(KERN_DEBUG "    0x%x\n", data);
583 		*tmp = data & 0xFF;
584 		break;
585 	case 2:
586 		data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
587 		printk(KERN_DEBUG "    0x%x\n", data);
588 		*tmp = data & 0xFF;
589 		*(tmp + 1) = (data >> 8) & 0xFF;
590 		break;
591 	case 3:
592 		data = ioread32(fusb300->reg + FUSB300_OFFSET_CXPORT);
593 		printk(KERN_DEBUG "    0x%x\n", data);
594 		*tmp = data & 0xFF;
595 		*(tmp + 1) = (data >> 8) & 0xFF;
596 		*(tmp + 2) = (data >> 16) & 0xFF;
597 		break;
598 	default:
599 		break;
600 	}
601 }
602 
603 static void fusb300_rdfifo(struct fusb300_ep *ep,
604 			  struct fusb300_request *req,
605 			  u32 length)
606 {
607 	int i = 0;
608 	u8 *tmp;
609 	u32 data, reg;
610 	struct fusb300 *fusb300 = ep->fusb300;
611 
612 	tmp = req->req.buf + req->req.actual;
613 	req->req.actual += length;
614 
615 	if (req->req.actual > req->req.length)
616 		printk(KERN_DEBUG "req->req.actual > req->req.length\n");
617 
618 	for (i = (length >> 2); i > 0; i--) {
619 		data = ioread32(fusb300->reg +
620 			FUSB300_OFFSET_EPPORT(ep->epnum));
621 		*tmp = data & 0xFF;
622 		*(tmp + 1) = (data >> 8) & 0xFF;
623 		*(tmp + 2) = (data >> 16) & 0xFF;
624 		*(tmp + 3) = (data >> 24) & 0xFF;
625 		tmp = tmp + 4;
626 	}
627 
628 	switch (length % 4) {
629 	case 1:
630 		data = ioread32(fusb300->reg +
631 			FUSB300_OFFSET_EPPORT(ep->epnum));
632 		*tmp = data & 0xFF;
633 		break;
634 	case 2:
635 		data = ioread32(fusb300->reg +
636 			FUSB300_OFFSET_EPPORT(ep->epnum));
637 		*tmp = data & 0xFF;
638 		*(tmp + 1) = (data >> 8) & 0xFF;
639 		break;
640 	case 3:
641 		data = ioread32(fusb300->reg +
642 			FUSB300_OFFSET_EPPORT(ep->epnum));
643 		*tmp = data & 0xFF;
644 		*(tmp + 1) = (data >> 8) & 0xFF;
645 		*(tmp + 2) = (data >> 16) & 0xFF;
646 		break;
647 	default:
648 		break;
649 	}
650 
651 	do {
652 		reg = ioread32(fusb300->reg + FUSB300_OFFSET_IGR1);
653 		reg &= FUSB300_IGR1_SYNF0_EMPTY_INT;
654 		if (i)
655 			printk(KERN_INFO "sync fifo is not empty!\n");
656 		i++;
657 	} while (!reg);
658 }
659 
660 static u8 fusb300_get_epnstall(struct fusb300 *fusb300, u8 ep)
661 {
662 	u8 value;
663 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPSET0(ep));
664 
665 	value = reg & FUSB300_EPSET0_STL;
666 
667 	return value;
668 }
669 
670 static u8 fusb300_get_cxstall(struct fusb300 *fusb300)
671 {
672 	u8 value;
673 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_CSR);
674 
675 	value = (reg & FUSB300_CSR_STL) >> 1;
676 
677 	return value;
678 }
679 
680 static void request_error(struct fusb300 *fusb300)
681 {
682 	fusb300_set_cxstall(fusb300);
683 	printk(KERN_DEBUG "request error!!\n");
684 }
685 
686 static void get_status(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
687 __releases(fusb300->lock)
688 __acquires(fusb300->lock)
689 {
690 	u8 ep;
691 	u16 status = 0;
692 	u16 w_index = ctrl->wIndex;
693 
694 	switch (ctrl->bRequestType & USB_RECIP_MASK) {
695 	case USB_RECIP_DEVICE:
696 		status = 1 << USB_DEVICE_SELF_POWERED;
697 		break;
698 	case USB_RECIP_INTERFACE:
699 		status = 0;
700 		break;
701 	case USB_RECIP_ENDPOINT:
702 		ep = w_index & USB_ENDPOINT_NUMBER_MASK;
703 		if (ep) {
704 			if (fusb300_get_epnstall(fusb300, ep))
705 				status = 1 << USB_ENDPOINT_HALT;
706 		} else {
707 			if (fusb300_get_cxstall(fusb300))
708 				status = 0;
709 		}
710 		break;
711 
712 	default:
713 		request_error(fusb300);
714 		return;		/* exit */
715 	}
716 
717 	fusb300->ep0_data = cpu_to_le16(status);
718 	fusb300->ep0_req->buf = &fusb300->ep0_data;
719 	fusb300->ep0_req->length = 2;
720 
721 	spin_unlock(&fusb300->lock);
722 	fusb300_queue(fusb300->gadget.ep0, fusb300->ep0_req, GFP_KERNEL);
723 	spin_lock(&fusb300->lock);
724 }
725 
726 static void set_feature(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
727 {
728 	u8 ep;
729 
730 	switch (ctrl->bRequestType & USB_RECIP_MASK) {
731 	case USB_RECIP_DEVICE:
732 		fusb300_set_cxdone(fusb300);
733 		break;
734 	case USB_RECIP_INTERFACE:
735 		fusb300_set_cxdone(fusb300);
736 		break;
737 	case USB_RECIP_ENDPOINT: {
738 		u16 w_index = le16_to_cpu(ctrl->wIndex);
739 
740 		ep = w_index & USB_ENDPOINT_NUMBER_MASK;
741 		if (ep)
742 			fusb300_set_epnstall(fusb300, ep);
743 		else
744 			fusb300_set_cxstall(fusb300);
745 		fusb300_set_cxdone(fusb300);
746 		}
747 		break;
748 	default:
749 		request_error(fusb300);
750 		break;
751 	}
752 }
753 
754 static void fusb300_clear_seqnum(struct fusb300 *fusb300, u8 ep)
755 {
756 	fusb300_enable_bit(fusb300, FUSB300_OFFSET_EPSET0(ep),
757 			    FUSB300_EPSET0_CLRSEQNUM);
758 }
759 
760 static void clear_feature(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
761 {
762 	struct fusb300_ep *ep =
763 		fusb300->ep[ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK];
764 
765 	switch (ctrl->bRequestType & USB_RECIP_MASK) {
766 	case USB_RECIP_DEVICE:
767 		fusb300_set_cxdone(fusb300);
768 		break;
769 	case USB_RECIP_INTERFACE:
770 		fusb300_set_cxdone(fusb300);
771 		break;
772 	case USB_RECIP_ENDPOINT:
773 		if (ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK) {
774 			if (ep->wedged) {
775 				fusb300_set_cxdone(fusb300);
776 				break;
777 			}
778 			if (ep->stall) {
779 				ep->stall = 0;
780 				fusb300_clear_seqnum(fusb300, ep->epnum);
781 				fusb300_clear_epnstall(fusb300, ep->epnum);
782 				if (!list_empty(&ep->queue))
783 					enable_fifo_int(ep);
784 			}
785 		}
786 		fusb300_set_cxdone(fusb300);
787 		break;
788 	default:
789 		request_error(fusb300);
790 		break;
791 	}
792 }
793 
794 static void fusb300_set_dev_addr(struct fusb300 *fusb300, u16 addr)
795 {
796 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_DAR);
797 
798 	reg &= ~FUSB300_DAR_DRVADDR_MSK;
799 	reg |= FUSB300_DAR_DRVADDR(addr);
800 
801 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_DAR);
802 }
803 
804 static void set_address(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
805 {
806 	if (ctrl->wValue >= 0x0100)
807 		request_error(fusb300);
808 	else {
809 		fusb300_set_dev_addr(fusb300, ctrl->wValue);
810 		fusb300_set_cxdone(fusb300);
811 	}
812 }
813 
814 #define UVC_COPY_DESCRIPTORS(mem, src) \
815 	do { \
816 		const struct usb_descriptor_header * const *__src; \
817 		for (__src = src; *__src; ++__src) { \
818 			memcpy(mem, *__src, (*__src)->bLength); \
819 			mem += (*__src)->bLength; \
820 		} \
821 	} while (0)
822 
823 static int setup_packet(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
824 {
825 	u8 *p = (u8 *)ctrl;
826 	u8 ret = 0;
827 	u8 i = 0;
828 
829 	fusb300_rdcxf(fusb300, p, 8);
830 	fusb300->ep0_dir = ctrl->bRequestType & USB_DIR_IN;
831 	fusb300->ep0_length = ctrl->wLength;
832 
833 	/* check request */
834 	if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
835 		switch (ctrl->bRequest) {
836 		case USB_REQ_GET_STATUS:
837 			get_status(fusb300, ctrl);
838 			break;
839 		case USB_REQ_CLEAR_FEATURE:
840 			clear_feature(fusb300, ctrl);
841 			break;
842 		case USB_REQ_SET_FEATURE:
843 			set_feature(fusb300, ctrl);
844 			break;
845 		case USB_REQ_SET_ADDRESS:
846 			set_address(fusb300, ctrl);
847 			break;
848 		case USB_REQ_SET_CONFIGURATION:
849 			fusb300_enable_bit(fusb300, FUSB300_OFFSET_DAR,
850 					   FUSB300_DAR_SETCONFG);
851 			/* clear sequence number */
852 			for (i = 1; i <= FUSB300_MAX_NUM_EP; i++)
853 				fusb300_clear_seqnum(fusb300, i);
854 			fusb300->reenum = 1;
855 			ret = 1;
856 			break;
857 		default:
858 			ret = 1;
859 			break;
860 		}
861 	} else
862 		ret = 1;
863 
864 	return ret;
865 }
866 
867 static void done(struct fusb300_ep *ep, struct fusb300_request *req,
868 		 int status)
869 {
870 	list_del_init(&req->queue);
871 
872 	/* don't modify queue heads during completion callback */
873 	if (ep->fusb300->gadget.speed == USB_SPEED_UNKNOWN)
874 		req->req.status = -ESHUTDOWN;
875 	else
876 		req->req.status = status;
877 
878 	spin_unlock(&ep->fusb300->lock);
879 	usb_gadget_giveback_request(&ep->ep, &req->req);
880 	spin_lock(&ep->fusb300->lock);
881 
882 	if (ep->epnum) {
883 		disable_fifo_int(ep);
884 		if (!list_empty(&ep->queue))
885 			enable_fifo_int(ep);
886 	} else
887 		fusb300_set_cxdone(ep->fusb300);
888 }
889 
890 static void fusb300_fill_idma_prdtbl(struct fusb300_ep *ep, dma_addr_t d,
891 		u32 len)
892 {
893 	u32 value;
894 	u32 reg;
895 
896 	/* wait SW owner */
897 	do {
898 		reg = ioread32(ep->fusb300->reg +
899 			FUSB300_OFFSET_EPPRD_W0(ep->epnum));
900 		reg &= FUSB300_EPPRD0_H;
901 	} while (reg);
902 
903 	iowrite32(d, ep->fusb300->reg + FUSB300_OFFSET_EPPRD_W1(ep->epnum));
904 
905 	value = FUSB300_EPPRD0_BTC(len) | FUSB300_EPPRD0_H |
906 		FUSB300_EPPRD0_F | FUSB300_EPPRD0_L | FUSB300_EPPRD0_I;
907 	iowrite32(value, ep->fusb300->reg + FUSB300_OFFSET_EPPRD_W0(ep->epnum));
908 
909 	iowrite32(0x0, ep->fusb300->reg + FUSB300_OFFSET_EPPRD_W2(ep->epnum));
910 
911 	fusb300_enable_bit(ep->fusb300, FUSB300_OFFSET_EPPRDRDY,
912 		FUSB300_EPPRDR_EP_PRD_RDY(ep->epnum));
913 }
914 
915 static void fusb300_wait_idma_finished(struct fusb300_ep *ep)
916 {
917 	u32 reg;
918 
919 	do {
920 		reg = ioread32(ep->fusb300->reg + FUSB300_OFFSET_IGR1);
921 		if ((reg & FUSB300_IGR1_VBUS_CHG_INT) ||
922 		    (reg & FUSB300_IGR1_WARM_RST_INT) ||
923 		    (reg & FUSB300_IGR1_HOT_RST_INT) ||
924 		    (reg & FUSB300_IGR1_USBRST_INT)
925 		)
926 			goto IDMA_RESET;
927 		reg = ioread32(ep->fusb300->reg + FUSB300_OFFSET_IGR0);
928 		reg &= FUSB300_IGR0_EPn_PRD_INT(ep->epnum);
929 	} while (!reg);
930 
931 	fusb300_clear_int(ep->fusb300, FUSB300_OFFSET_IGR0,
932 		FUSB300_IGR0_EPn_PRD_INT(ep->epnum));
933 	return;
934 
935 IDMA_RESET:
936 	reg = ioread32(ep->fusb300->reg + FUSB300_OFFSET_IGER0);
937 	reg &= ~FUSB300_IGER0_EEPn_PRD_INT(ep->epnum);
938 	iowrite32(reg, ep->fusb300->reg + FUSB300_OFFSET_IGER0);
939 }
940 
941 static void fusb300_set_idma(struct fusb300_ep *ep,
942 			struct fusb300_request *req)
943 {
944 	int ret;
945 
946 	ret = usb_gadget_map_request(&ep->fusb300->gadget,
947 			&req->req, DMA_TO_DEVICE);
948 	if (ret)
949 		return;
950 
951 	fusb300_enable_bit(ep->fusb300, FUSB300_OFFSET_IGER0,
952 		FUSB300_IGER0_EEPn_PRD_INT(ep->epnum));
953 
954 	fusb300_fill_idma_prdtbl(ep, req->req.dma, req->req.length);
955 	/* check idma is done */
956 	fusb300_wait_idma_finished(ep);
957 
958 	usb_gadget_unmap_request(&ep->fusb300->gadget,
959 			&req->req, DMA_TO_DEVICE);
960 }
961 
962 static void in_ep_fifo_handler(struct fusb300_ep *ep)
963 {
964 	struct fusb300_request *req = list_entry(ep->queue.next,
965 					struct fusb300_request, queue);
966 
967 	if (req->req.length)
968 		fusb300_set_idma(ep, req);
969 	done(ep, req, 0);
970 }
971 
972 static void out_ep_fifo_handler(struct fusb300_ep *ep)
973 {
974 	struct fusb300 *fusb300 = ep->fusb300;
975 	struct fusb300_request *req = list_entry(ep->queue.next,
976 						 struct fusb300_request, queue);
977 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_EPFFR(ep->epnum));
978 	u32 length = reg & FUSB300_FFR_BYCNT;
979 
980 	fusb300_rdfifo(ep, req, length);
981 
982 	/* finish out transfer */
983 	if ((req->req.length == req->req.actual) || (length < ep->ep.maxpacket))
984 		done(ep, req, 0);
985 }
986 
987 static void check_device_mode(struct fusb300 *fusb300)
988 {
989 	u32 reg = ioread32(fusb300->reg + FUSB300_OFFSET_GCR);
990 
991 	switch (reg & FUSB300_GCR_DEVEN_MSK) {
992 	case FUSB300_GCR_DEVEN_SS:
993 		fusb300->gadget.speed = USB_SPEED_SUPER;
994 		break;
995 	case FUSB300_GCR_DEVEN_HS:
996 		fusb300->gadget.speed = USB_SPEED_HIGH;
997 		break;
998 	case FUSB300_GCR_DEVEN_FS:
999 		fusb300->gadget.speed = USB_SPEED_FULL;
1000 		break;
1001 	default:
1002 		fusb300->gadget.speed = USB_SPEED_UNKNOWN;
1003 		break;
1004 	}
1005 	printk(KERN_INFO "dev_mode = %d\n", (reg & FUSB300_GCR_DEVEN_MSK));
1006 }
1007 
1008 
1009 static void fusb300_ep0out(struct fusb300 *fusb300)
1010 {
1011 	struct fusb300_ep *ep = fusb300->ep[0];
1012 	u32 reg;
1013 
1014 	if (!list_empty(&ep->queue)) {
1015 		struct fusb300_request *req;
1016 
1017 		req = list_first_entry(&ep->queue,
1018 			struct fusb300_request, queue);
1019 		if (req->req.length)
1020 			fusb300_rdcxf(ep->fusb300, req->req.buf,
1021 				req->req.length);
1022 		done(ep, req, 0);
1023 		reg = ioread32(fusb300->reg + FUSB300_OFFSET_IGER1);
1024 		reg &= ~FUSB300_IGER1_CX_OUT_INT;
1025 		iowrite32(reg, fusb300->reg + FUSB300_OFFSET_IGER1);
1026 	} else
1027 		pr_err("%s : empty queue\n", __func__);
1028 }
1029 
1030 static void fusb300_ep0in(struct fusb300 *fusb300)
1031 {
1032 	struct fusb300_request *req;
1033 	struct fusb300_ep *ep = fusb300->ep[0];
1034 
1035 	if ((!list_empty(&ep->queue)) && (fusb300->ep0_dir)) {
1036 		req = list_entry(ep->queue.next,
1037 				struct fusb300_request, queue);
1038 		if (req->req.length)
1039 			fusb300_wrcxf(ep, req);
1040 		if ((req->req.length - req->req.actual) < ep->ep.maxpacket)
1041 			done(ep, req, 0);
1042 	} else
1043 		fusb300_set_cxdone(fusb300);
1044 }
1045 
1046 static void fusb300_grp2_handler(void)
1047 {
1048 }
1049 
1050 static void fusb300_grp3_handler(void)
1051 {
1052 }
1053 
1054 static void fusb300_grp4_handler(void)
1055 {
1056 }
1057 
1058 static void fusb300_grp5_handler(void)
1059 {
1060 }
1061 
1062 static irqreturn_t fusb300_irq(int irq, void *_fusb300)
1063 {
1064 	struct fusb300 *fusb300 = _fusb300;
1065 	u32 int_grp1 = ioread32(fusb300->reg + FUSB300_OFFSET_IGR1);
1066 	u32 int_grp1_en = ioread32(fusb300->reg + FUSB300_OFFSET_IGER1);
1067 	u32 int_grp0 = ioread32(fusb300->reg + FUSB300_OFFSET_IGR0);
1068 	u32 int_grp0_en = ioread32(fusb300->reg + FUSB300_OFFSET_IGER0);
1069 	struct usb_ctrlrequest ctrl;
1070 	u8 in;
1071 	u32 reg;
1072 	int i;
1073 
1074 	spin_lock(&fusb300->lock);
1075 
1076 	int_grp1 &= int_grp1_en;
1077 	int_grp0 &= int_grp0_en;
1078 
1079 	if (int_grp1 & FUSB300_IGR1_WARM_RST_INT) {
1080 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1081 				  FUSB300_IGR1_WARM_RST_INT);
1082 		printk(KERN_INFO"fusb300_warmreset\n");
1083 		fusb300_reset();
1084 	}
1085 
1086 	if (int_grp1 & FUSB300_IGR1_HOT_RST_INT) {
1087 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1088 				  FUSB300_IGR1_HOT_RST_INT);
1089 		printk(KERN_INFO"fusb300_hotreset\n");
1090 		fusb300_reset();
1091 	}
1092 
1093 	if (int_grp1 & FUSB300_IGR1_USBRST_INT) {
1094 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1095 				  FUSB300_IGR1_USBRST_INT);
1096 		fusb300_reset();
1097 	}
1098 	/* COMABT_INT has a highest priority */
1099 
1100 	if (int_grp1 & FUSB300_IGR1_CX_COMABT_INT) {
1101 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1102 				  FUSB300_IGR1_CX_COMABT_INT);
1103 		printk(KERN_INFO"fusb300_ep0abt\n");
1104 	}
1105 
1106 	if (int_grp1 & FUSB300_IGR1_VBUS_CHG_INT) {
1107 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1108 				  FUSB300_IGR1_VBUS_CHG_INT);
1109 		printk(KERN_INFO"fusb300_vbus_change\n");
1110 	}
1111 
1112 	if (int_grp1 & FUSB300_IGR1_U3_EXIT_FAIL_INT) {
1113 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1114 				  FUSB300_IGR1_U3_EXIT_FAIL_INT);
1115 	}
1116 
1117 	if (int_grp1 & FUSB300_IGR1_U2_EXIT_FAIL_INT) {
1118 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1119 				  FUSB300_IGR1_U2_EXIT_FAIL_INT);
1120 	}
1121 
1122 	if (int_grp1 & FUSB300_IGR1_U1_EXIT_FAIL_INT) {
1123 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1124 				  FUSB300_IGR1_U1_EXIT_FAIL_INT);
1125 	}
1126 
1127 	if (int_grp1 & FUSB300_IGR1_U2_ENTRY_FAIL_INT) {
1128 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1129 				  FUSB300_IGR1_U2_ENTRY_FAIL_INT);
1130 	}
1131 
1132 	if (int_grp1 & FUSB300_IGR1_U1_ENTRY_FAIL_INT) {
1133 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1134 				  FUSB300_IGR1_U1_ENTRY_FAIL_INT);
1135 	}
1136 
1137 	if (int_grp1 & FUSB300_IGR1_U3_EXIT_INT) {
1138 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1139 				  FUSB300_IGR1_U3_EXIT_INT);
1140 		printk(KERN_INFO "FUSB300_IGR1_U3_EXIT_INT\n");
1141 	}
1142 
1143 	if (int_grp1 & FUSB300_IGR1_U2_EXIT_INT) {
1144 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1145 				  FUSB300_IGR1_U2_EXIT_INT);
1146 		printk(KERN_INFO "FUSB300_IGR1_U2_EXIT_INT\n");
1147 	}
1148 
1149 	if (int_grp1 & FUSB300_IGR1_U1_EXIT_INT) {
1150 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1151 				  FUSB300_IGR1_U1_EXIT_INT);
1152 		printk(KERN_INFO "FUSB300_IGR1_U1_EXIT_INT\n");
1153 	}
1154 
1155 	if (int_grp1 & FUSB300_IGR1_U3_ENTRY_INT) {
1156 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1157 				  FUSB300_IGR1_U3_ENTRY_INT);
1158 		printk(KERN_INFO "FUSB300_IGR1_U3_ENTRY_INT\n");
1159 		fusb300_enable_bit(fusb300, FUSB300_OFFSET_SSCR1,
1160 				   FUSB300_SSCR1_GO_U3_DONE);
1161 	}
1162 
1163 	if (int_grp1 & FUSB300_IGR1_U2_ENTRY_INT) {
1164 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1165 				  FUSB300_IGR1_U2_ENTRY_INT);
1166 		printk(KERN_INFO "FUSB300_IGR1_U2_ENTRY_INT\n");
1167 	}
1168 
1169 	if (int_grp1 & FUSB300_IGR1_U1_ENTRY_INT) {
1170 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1171 				  FUSB300_IGR1_U1_ENTRY_INT);
1172 		printk(KERN_INFO "FUSB300_IGR1_U1_ENTRY_INT\n");
1173 	}
1174 
1175 	if (int_grp1 & FUSB300_IGR1_RESM_INT) {
1176 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1177 				  FUSB300_IGR1_RESM_INT);
1178 		printk(KERN_INFO "fusb300_resume\n");
1179 	}
1180 
1181 	if (int_grp1 & FUSB300_IGR1_SUSP_INT) {
1182 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1183 				  FUSB300_IGR1_SUSP_INT);
1184 		printk(KERN_INFO "fusb300_suspend\n");
1185 	}
1186 
1187 	if (int_grp1 & FUSB300_IGR1_HS_LPM_INT) {
1188 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1189 				  FUSB300_IGR1_HS_LPM_INT);
1190 		printk(KERN_INFO "fusb300_HS_LPM_INT\n");
1191 	}
1192 
1193 	if (int_grp1 & FUSB300_IGR1_DEV_MODE_CHG_INT) {
1194 		fusb300_clear_int(fusb300, FUSB300_OFFSET_IGR1,
1195 				  FUSB300_IGR1_DEV_MODE_CHG_INT);
1196 		check_device_mode(fusb300);
1197 	}
1198 
1199 	if (int_grp1 & FUSB300_IGR1_CX_COMFAIL_INT) {
1200 		fusb300_set_cxstall(fusb300);
1201 		printk(KERN_INFO "fusb300_ep0fail\n");
1202 	}
1203 
1204 	if (int_grp1 & FUSB300_IGR1_CX_SETUP_INT) {
1205 		printk(KERN_INFO "fusb300_ep0setup\n");
1206 		if (setup_packet(fusb300, &ctrl)) {
1207 			spin_unlock(&fusb300->lock);
1208 			if (fusb300->driver->setup(&fusb300->gadget, &ctrl) < 0)
1209 				fusb300_set_cxstall(fusb300);
1210 			spin_lock(&fusb300->lock);
1211 		}
1212 	}
1213 
1214 	if (int_grp1 & FUSB300_IGR1_CX_CMDEND_INT)
1215 		printk(KERN_INFO "fusb300_cmdend\n");
1216 
1217 
1218 	if (int_grp1 & FUSB300_IGR1_CX_OUT_INT) {
1219 		printk(KERN_INFO "fusb300_cxout\n");
1220 		fusb300_ep0out(fusb300);
1221 	}
1222 
1223 	if (int_grp1 & FUSB300_IGR1_CX_IN_INT) {
1224 		printk(KERN_INFO "fusb300_cxin\n");
1225 		fusb300_ep0in(fusb300);
1226 	}
1227 
1228 	if (int_grp1 & FUSB300_IGR1_INTGRP5)
1229 		fusb300_grp5_handler();
1230 
1231 	if (int_grp1 & FUSB300_IGR1_INTGRP4)
1232 		fusb300_grp4_handler();
1233 
1234 	if (int_grp1 & FUSB300_IGR1_INTGRP3)
1235 		fusb300_grp3_handler();
1236 
1237 	if (int_grp1 & FUSB300_IGR1_INTGRP2)
1238 		fusb300_grp2_handler();
1239 
1240 	if (int_grp0) {
1241 		for (i = 1; i < FUSB300_MAX_NUM_EP; i++) {
1242 			if (int_grp0 & FUSB300_IGR0_EPn_FIFO_INT(i)) {
1243 				reg = ioread32(fusb300->reg +
1244 					FUSB300_OFFSET_EPSET1(i));
1245 				in = (reg & FUSB300_EPSET1_DIRIN) ? 1 : 0;
1246 				if (in)
1247 					in_ep_fifo_handler(fusb300->ep[i]);
1248 				else
1249 					out_ep_fifo_handler(fusb300->ep[i]);
1250 			}
1251 		}
1252 	}
1253 
1254 	spin_unlock(&fusb300->lock);
1255 
1256 	return IRQ_HANDLED;
1257 }
1258 
1259 static void fusb300_set_u2_timeout(struct fusb300 *fusb300,
1260 				   u32 time)
1261 {
1262 	u32 reg;
1263 
1264 	reg = ioread32(fusb300->reg + FUSB300_OFFSET_TT);
1265 	reg &= ~0xff;
1266 	reg |= FUSB300_SSCR2_U2TIMEOUT(time);
1267 
1268 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_TT);
1269 }
1270 
1271 static void fusb300_set_u1_timeout(struct fusb300 *fusb300,
1272 				   u32 time)
1273 {
1274 	u32 reg;
1275 
1276 	reg = ioread32(fusb300->reg + FUSB300_OFFSET_TT);
1277 	reg &= ~(0xff << 8);
1278 	reg |= FUSB300_SSCR2_U1TIMEOUT(time);
1279 
1280 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_TT);
1281 }
1282 
1283 static void init_controller(struct fusb300 *fusb300)
1284 {
1285 	u32 reg;
1286 	u32 mask = 0;
1287 	u32 val = 0;
1288 
1289 	/* split on */
1290 	mask = val = FUSB300_AHBBCR_S0_SPLIT_ON | FUSB300_AHBBCR_S1_SPLIT_ON;
1291 	reg = ioread32(fusb300->reg + FUSB300_OFFSET_AHBCR);
1292 	reg &= ~mask;
1293 	reg |= val;
1294 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_AHBCR);
1295 
1296 	/* enable high-speed LPM */
1297 	mask = val = FUSB300_HSCR_HS_LPM_PERMIT;
1298 	reg = ioread32(fusb300->reg + FUSB300_OFFSET_HSCR);
1299 	reg &= ~mask;
1300 	reg |= val;
1301 	iowrite32(reg, fusb300->reg + FUSB300_OFFSET_HSCR);
1302 
1303 	/*set u1 u2 timmer*/
1304 	fusb300_set_u2_timeout(fusb300, 0xff);
1305 	fusb300_set_u1_timeout(fusb300, 0xff);
1306 
1307 	/* enable all grp1 interrupt */
1308 	iowrite32(0xcfffff9f, fusb300->reg + FUSB300_OFFSET_IGER1);
1309 }
1310 /*------------------------------------------------------------------------*/
1311 static int fusb300_udc_start(struct usb_gadget *g,
1312 		struct usb_gadget_driver *driver)
1313 {
1314 	struct fusb300 *fusb300 = to_fusb300(g);
1315 
1316 	/* hook up the driver */
1317 	driver->driver.bus = NULL;
1318 	fusb300->driver = driver;
1319 
1320 	return 0;
1321 }
1322 
1323 static int fusb300_udc_stop(struct usb_gadget *g)
1324 {
1325 	struct fusb300 *fusb300 = to_fusb300(g);
1326 
1327 	init_controller(fusb300);
1328 	fusb300->driver = NULL;
1329 
1330 	return 0;
1331 }
1332 /*--------------------------------------------------------------------------*/
1333 
1334 static int fusb300_udc_pullup(struct usb_gadget *_gadget, int is_active)
1335 {
1336 	return 0;
1337 }
1338 
1339 static const struct usb_gadget_ops fusb300_gadget_ops = {
1340 	.pullup		= fusb300_udc_pullup,
1341 	.udc_start	= fusb300_udc_start,
1342 	.udc_stop	= fusb300_udc_stop,
1343 };
1344 
1345 static int fusb300_remove(struct platform_device *pdev)
1346 {
1347 	struct fusb300 *fusb300 = platform_get_drvdata(pdev);
1348 
1349 	usb_del_gadget_udc(&fusb300->gadget);
1350 	iounmap(fusb300->reg);
1351 	free_irq(platform_get_irq(pdev, 0), fusb300);
1352 
1353 	fusb300_free_request(&fusb300->ep[0]->ep, fusb300->ep0_req);
1354 	kfree(fusb300);
1355 
1356 	return 0;
1357 }
1358 
1359 static int fusb300_probe(struct platform_device *pdev)
1360 {
1361 	struct resource *res, *ires, *ires1;
1362 	void __iomem *reg = NULL;
1363 	struct fusb300 *fusb300 = NULL;
1364 	struct fusb300_ep *_ep[FUSB300_MAX_NUM_EP];
1365 	int ret = 0;
1366 	int i;
1367 
1368 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1369 	if (!res) {
1370 		ret = -ENODEV;
1371 		pr_err("platform_get_resource error.\n");
1372 		goto clean_up;
1373 	}
1374 
1375 	ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1376 	if (!ires) {
1377 		ret = -ENODEV;
1378 		dev_err(&pdev->dev,
1379 			"platform_get_resource IORESOURCE_IRQ error.\n");
1380 		goto clean_up;
1381 	}
1382 
1383 	ires1 = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
1384 	if (!ires1) {
1385 		ret = -ENODEV;
1386 		dev_err(&pdev->dev,
1387 			"platform_get_resource IORESOURCE_IRQ 1 error.\n");
1388 		goto clean_up;
1389 	}
1390 
1391 	reg = ioremap(res->start, resource_size(res));
1392 	if (reg == NULL) {
1393 		ret = -ENOMEM;
1394 		pr_err("ioremap error.\n");
1395 		goto clean_up;
1396 	}
1397 
1398 	/* initialize udc */
1399 	fusb300 = kzalloc(sizeof(struct fusb300), GFP_KERNEL);
1400 	if (fusb300 == NULL) {
1401 		ret = -ENOMEM;
1402 		goto clean_up;
1403 	}
1404 
1405 	for (i = 0; i < FUSB300_MAX_NUM_EP; i++) {
1406 		_ep[i] = kzalloc(sizeof(struct fusb300_ep), GFP_KERNEL);
1407 		if (_ep[i] == NULL) {
1408 			ret = -ENOMEM;
1409 			goto clean_up;
1410 		}
1411 		fusb300->ep[i] = _ep[i];
1412 	}
1413 
1414 	spin_lock_init(&fusb300->lock);
1415 
1416 	platform_set_drvdata(pdev, fusb300);
1417 
1418 	fusb300->gadget.ops = &fusb300_gadget_ops;
1419 
1420 	fusb300->gadget.max_speed = USB_SPEED_HIGH;
1421 	fusb300->gadget.name = udc_name;
1422 	fusb300->reg = reg;
1423 
1424 	ret = request_irq(ires->start, fusb300_irq, IRQF_SHARED,
1425 			  udc_name, fusb300);
1426 	if (ret < 0) {
1427 		pr_err("request_irq error (%d)\n", ret);
1428 		goto clean_up;
1429 	}
1430 
1431 	ret = request_irq(ires1->start, fusb300_irq,
1432 			IRQF_SHARED, udc_name, fusb300);
1433 	if (ret < 0) {
1434 		pr_err("request_irq1 error (%d)\n", ret);
1435 		goto clean_up;
1436 	}
1437 
1438 	INIT_LIST_HEAD(&fusb300->gadget.ep_list);
1439 
1440 	for (i = 0; i < FUSB300_MAX_NUM_EP ; i++) {
1441 		struct fusb300_ep *ep = fusb300->ep[i];
1442 
1443 		if (i != 0) {
1444 			INIT_LIST_HEAD(&fusb300->ep[i]->ep.ep_list);
1445 			list_add_tail(&fusb300->ep[i]->ep.ep_list,
1446 				     &fusb300->gadget.ep_list);
1447 		}
1448 		ep->fusb300 = fusb300;
1449 		INIT_LIST_HEAD(&ep->queue);
1450 		ep->ep.name = fusb300_ep_name[i];
1451 		ep->ep.ops = &fusb300_ep_ops;
1452 		usb_ep_set_maxpacket_limit(&ep->ep, HS_BULK_MAX_PACKET_SIZE);
1453 	}
1454 	usb_ep_set_maxpacket_limit(&fusb300->ep[0]->ep, HS_CTL_MAX_PACKET_SIZE);
1455 	fusb300->ep[0]->epnum = 0;
1456 	fusb300->gadget.ep0 = &fusb300->ep[0]->ep;
1457 	INIT_LIST_HEAD(&fusb300->gadget.ep0->ep_list);
1458 
1459 	fusb300->ep0_req = fusb300_alloc_request(&fusb300->ep[0]->ep,
1460 				GFP_KERNEL);
1461 	if (fusb300->ep0_req == NULL) {
1462 		ret = -ENOMEM;
1463 		goto clean_up3;
1464 	}
1465 
1466 	init_controller(fusb300);
1467 	ret = usb_add_gadget_udc(&pdev->dev, &fusb300->gadget);
1468 	if (ret)
1469 		goto err_add_udc;
1470 
1471 	dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
1472 
1473 	return 0;
1474 
1475 err_add_udc:
1476 	fusb300_free_request(&fusb300->ep[0]->ep, fusb300->ep0_req);
1477 
1478 clean_up3:
1479 	free_irq(ires->start, fusb300);
1480 
1481 clean_up:
1482 	if (fusb300) {
1483 		if (fusb300->ep0_req)
1484 			fusb300_free_request(&fusb300->ep[0]->ep,
1485 				fusb300->ep0_req);
1486 		kfree(fusb300);
1487 	}
1488 	if (reg)
1489 		iounmap(reg);
1490 
1491 	return ret;
1492 }
1493 
1494 static struct platform_driver fusb300_driver = {
1495 	.remove =	fusb300_remove,
1496 	.driver		= {
1497 		.name =	(char *) udc_name,
1498 	},
1499 };
1500 
1501 module_platform_driver_probe(fusb300_driver, fusb300_probe);
1502