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10#include <linux/clk.h>
11#include <linux/module.h>
12#include <linux/init.h>
13#include <linux/interrupt.h>
14#include <linux/io.h>
15#include <linux/slab.h>
16#include <linux/device.h>
17#include <linux/dma-mapping.h>
18#include <linux/list.h>
19#include <linux/platform_device.h>
20#include <linux/usb/ch9.h>
21#include <linux/usb/gadget.h>
22#include <linux/usb/atmel_usba_udc.h>
23#include <linux/delay.h>
24
25#include <asm/gpio.h>
26#include <mach/board.h>
27
28#include "atmel_usba_udc.h"
29
30
31static struct usba_udc the_udc;
32static struct usba_ep *usba_ep;
33
34#ifdef CONFIG_USB_GADGET_DEBUG_FS
35#include <linux/debugfs.h>
36#include <linux/uaccess.h>
37
38static int queue_dbg_open(struct inode *inode, struct file *file)
39{
40 struct usba_ep *ep = inode->i_private;
41 struct usba_request *req, *req_copy;
42 struct list_head *queue_data;
43
44 queue_data = kmalloc(sizeof(*queue_data), GFP_KERNEL);
45 if (!queue_data)
46 return -ENOMEM;
47 INIT_LIST_HEAD(queue_data);
48
49 spin_lock_irq(&ep->udc->lock);
50 list_for_each_entry(req, &ep->queue, queue) {
51 req_copy = kmemdup(req, sizeof(*req_copy), GFP_ATOMIC);
52 if (!req_copy)
53 goto fail;
54 list_add_tail(&req_copy->queue, queue_data);
55 }
56 spin_unlock_irq(&ep->udc->lock);
57
58 file->private_data = queue_data;
59 return 0;
60
61fail:
62 spin_unlock_irq(&ep->udc->lock);
63 list_for_each_entry_safe(req, req_copy, queue_data, queue) {
64 list_del(&req->queue);
65 kfree(req);
66 }
67 kfree(queue_data);
68 return -ENOMEM;
69}
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85static ssize_t queue_dbg_read(struct file *file, char __user *buf,
86 size_t nbytes, loff_t *ppos)
87{
88 struct list_head *queue = file->private_data;
89 struct usba_request *req, *tmp_req;
90 size_t len, remaining, actual = 0;
91 char tmpbuf[38];
92
93 if (!access_ok(VERIFY_WRITE, buf, nbytes))
94 return -EFAULT;
95
96 mutex_lock(&file->f_dentry->d_inode->i_mutex);
97 list_for_each_entry_safe(req, tmp_req, queue, queue) {
98 len = snprintf(tmpbuf, sizeof(tmpbuf),
99 "%8p %08x %c%c%c %5d %c%c%c\n",
100 req->req.buf, req->req.length,
101 req->req.no_interrupt ? 'i' : 'I',
102 req->req.zero ? 'Z' : 'z',
103 req->req.short_not_ok ? 's' : 'S',
104 req->req.status,
105 req->submitted ? 'F' : 'f',
106 req->using_dma ? 'D' : 'd',
107 req->last_transaction ? 'L' : 'l');
108 len = min(len, sizeof(tmpbuf));
109 if (len > nbytes)
110 break;
111
112 list_del(&req->queue);
113 kfree(req);
114
115 remaining = __copy_to_user(buf, tmpbuf, len);
116 actual += len - remaining;
117 if (remaining)
118 break;
119
120 nbytes -= len;
121 buf += len;
122 }
123 mutex_unlock(&file->f_dentry->d_inode->i_mutex);
124
125 return actual;
126}
127
128static int queue_dbg_release(struct inode *inode, struct file *file)
129{
130 struct list_head *queue_data = file->private_data;
131 struct usba_request *req, *tmp_req;
132
133 list_for_each_entry_safe(req, tmp_req, queue_data, queue) {
134 list_del(&req->queue);
135 kfree(req);
136 }
137 kfree(queue_data);
138 return 0;
139}
140
141static int regs_dbg_open(struct inode *inode, struct file *file)
142{
143 struct usba_udc *udc;
144 unsigned int i;
145 u32 *data;
146 int ret = -ENOMEM;
147
148 mutex_lock(&inode->i_mutex);
149 udc = inode->i_private;
150 data = kmalloc(inode->i_size, GFP_KERNEL);
151 if (!data)
152 goto out;
153
154 spin_lock_irq(&udc->lock);
155 for (i = 0; i < inode->i_size / 4; i++)
156 data[i] = __raw_readl(udc->regs + i * 4);
157 spin_unlock_irq(&udc->lock);
158
159 file->private_data = data;
160 ret = 0;
161
162out:
163 mutex_unlock(&inode->i_mutex);
164
165 return ret;
166}
167
168static ssize_t regs_dbg_read(struct file *file, char __user *buf,
169 size_t nbytes, loff_t *ppos)
170{
171 struct inode *inode = file->f_dentry->d_inode;
172 int ret;
173
174 mutex_lock(&inode->i_mutex);
175 ret = simple_read_from_buffer(buf, nbytes, ppos,
176 file->private_data,
177 file->f_dentry->d_inode->i_size);
178 mutex_unlock(&inode->i_mutex);
179
180 return ret;
181}
182
183static int regs_dbg_release(struct inode *inode, struct file *file)
184{
185 kfree(file->private_data);
186 return 0;
187}
188
189const struct file_operations queue_dbg_fops = {
190 .owner = THIS_MODULE,
191 .open = queue_dbg_open,
192 .llseek = no_llseek,
193 .read = queue_dbg_read,
194 .release = queue_dbg_release,
195};
196
197const struct file_operations regs_dbg_fops = {
198 .owner = THIS_MODULE,
199 .open = regs_dbg_open,
200 .llseek = generic_file_llseek,
201 .read = regs_dbg_read,
202 .release = regs_dbg_release,
203};
204
205static void usba_ep_init_debugfs(struct usba_udc *udc,
206 struct usba_ep *ep)
207{
208 struct dentry *ep_root;
209
210 ep_root = debugfs_create_dir(ep->ep.name, udc->debugfs_root);
211 if (!ep_root)
212 goto err_root;
213 ep->debugfs_dir = ep_root;
214
215 ep->debugfs_queue = debugfs_create_file("queue", 0400, ep_root,
216 ep, &queue_dbg_fops);
217 if (!ep->debugfs_queue)
218 goto err_queue;
219
220 if (ep->can_dma) {
221 ep->debugfs_dma_status
222 = debugfs_create_u32("dma_status", 0400, ep_root,
223 &ep->last_dma_status);
224 if (!ep->debugfs_dma_status)
225 goto err_dma_status;
226 }
227 if (ep_is_control(ep)) {
228 ep->debugfs_state
229 = debugfs_create_u32("state", 0400, ep_root,
230 &ep->state);
231 if (!ep->debugfs_state)
232 goto err_state;
233 }
234
235 return;
236
237err_state:
238 if (ep->can_dma)
239 debugfs_remove(ep->debugfs_dma_status);
240err_dma_status:
241 debugfs_remove(ep->debugfs_queue);
242err_queue:
243 debugfs_remove(ep_root);
244err_root:
245 dev_err(&ep->udc->pdev->dev,
246 "failed to create debugfs directory for %s\n", ep->ep.name);
247}
248
249static void usba_ep_cleanup_debugfs(struct usba_ep *ep)
250{
251 debugfs_remove(ep->debugfs_queue);
252 debugfs_remove(ep->debugfs_dma_status);
253 debugfs_remove(ep->debugfs_state);
254 debugfs_remove(ep->debugfs_dir);
255 ep->debugfs_dma_status = NULL;
256 ep->debugfs_dir = NULL;
257}
258
259static void usba_init_debugfs(struct usba_udc *udc)
260{
261 struct dentry *root, *regs;
262 struct resource *regs_resource;
263
264 root = debugfs_create_dir(udc->gadget.name, NULL);
265 if (IS_ERR(root) || !root)
266 goto err_root;
267 udc->debugfs_root = root;
268
269 regs = debugfs_create_file("regs", 0400, root, udc, ®s_dbg_fops);
270 if (!regs)
271 goto err_regs;
272
273 regs_resource = platform_get_resource(udc->pdev, IORESOURCE_MEM,
274 CTRL_IOMEM_ID);
275 regs->d_inode->i_size = resource_size(regs_resource);
276 udc->debugfs_regs = regs;
277
278 usba_ep_init_debugfs(udc, to_usba_ep(udc->gadget.ep0));
279
280 return;
281
282err_regs:
283 debugfs_remove(root);
284err_root:
285 udc->debugfs_root = NULL;
286 dev_err(&udc->pdev->dev, "debugfs is not available\n");
287}
288
289static void usba_cleanup_debugfs(struct usba_udc *udc)
290{
291 usba_ep_cleanup_debugfs(to_usba_ep(udc->gadget.ep0));
292 debugfs_remove(udc->debugfs_regs);
293 debugfs_remove(udc->debugfs_root);
294 udc->debugfs_regs = NULL;
295 udc->debugfs_root = NULL;
296}
297#else
298static inline void usba_ep_init_debugfs(struct usba_udc *udc,
299 struct usba_ep *ep)
300{
301
302}
303
304static inline void usba_ep_cleanup_debugfs(struct usba_ep *ep)
305{
306
307}
308
309static inline void usba_init_debugfs(struct usba_udc *udc)
310{
311
312}
313
314static inline void usba_cleanup_debugfs(struct usba_udc *udc)
315{
316
317}
318#endif
319
320static int vbus_is_present(struct usba_udc *udc)
321{
322 if (gpio_is_valid(udc->vbus_pin))
323 return gpio_get_value(udc->vbus_pin) ^ udc->vbus_pin_inverted;
324
325
326 return 1;
327}
328
329#if defined(CONFIG_ARCH_AT91SAM9RL)
330
331#include <mach/at91_pmc.h>
332
333static void toggle_bias(int is_on)
334{
335 unsigned int uckr = at91_sys_read(AT91_CKGR_UCKR);
336
337 if (is_on)
338 at91_sys_write(AT91_CKGR_UCKR, uckr | AT91_PMC_BIASEN);
339 else
340 at91_sys_write(AT91_CKGR_UCKR, uckr & ~(AT91_PMC_BIASEN));
341}
342
343#else
344
345static void toggle_bias(int is_on)
346{
347}
348
349#endif
350
351static void next_fifo_transaction(struct usba_ep *ep, struct usba_request *req)
352{
353 unsigned int transaction_len;
354
355 transaction_len = req->req.length - req->req.actual;
356 req->last_transaction = 1;
357 if (transaction_len > ep->ep.maxpacket) {
358 transaction_len = ep->ep.maxpacket;
359 req->last_transaction = 0;
360 } else if (transaction_len == ep->ep.maxpacket && req->req.zero)
361 req->last_transaction = 0;
362
363 DBG(DBG_QUEUE, "%s: submit_transaction, req %p (length %d)%s\n",
364 ep->ep.name, req, transaction_len,
365 req->last_transaction ? ", done" : "");
366
367 memcpy_toio(ep->fifo, req->req.buf + req->req.actual, transaction_len);
368 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
369 req->req.actual += transaction_len;
370}
371
372static void submit_request(struct usba_ep *ep, struct usba_request *req)
373{
374 DBG(DBG_QUEUE, "%s: submit_request: req %p (length %d)\n",
375 ep->ep.name, req, req->req.length);
376
377 req->req.actual = 0;
378 req->submitted = 1;
379
380 if (req->using_dma) {
381 if (req->req.length == 0) {
382 usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
383 return;
384 }
385
386 if (req->req.zero)
387 usba_ep_writel(ep, CTL_ENB, USBA_SHORT_PACKET);
388 else
389 usba_ep_writel(ep, CTL_DIS, USBA_SHORT_PACKET);
390
391 usba_dma_writel(ep, ADDRESS, req->req.dma);
392 usba_dma_writel(ep, CONTROL, req->ctrl);
393 } else {
394 next_fifo_transaction(ep, req);
395 if (req->last_transaction) {
396 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
397 usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
398 } else {
399 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
400 usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
401 }
402 }
403}
404
405static void submit_next_request(struct usba_ep *ep)
406{
407 struct usba_request *req;
408
409 if (list_empty(&ep->queue)) {
410 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY | USBA_RX_BK_RDY);
411 return;
412 }
413
414 req = list_entry(ep->queue.next, struct usba_request, queue);
415 if (!req->submitted)
416 submit_request(ep, req);
417}
418
419static void send_status(struct usba_udc *udc, struct usba_ep *ep)
420{
421 ep->state = STATUS_STAGE_IN;
422 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
423 usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
424}
425
426static void receive_data(struct usba_ep *ep)
427{
428 struct usba_udc *udc = ep->udc;
429 struct usba_request *req;
430 unsigned long status;
431 unsigned int bytecount, nr_busy;
432 int is_complete = 0;
433
434 status = usba_ep_readl(ep, STA);
435 nr_busy = USBA_BFEXT(BUSY_BANKS, status);
436
437 DBG(DBG_QUEUE, "receive data: nr_busy=%u\n", nr_busy);
438
439 while (nr_busy > 0) {
440 if (list_empty(&ep->queue)) {
441 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
442 break;
443 }
444 req = list_entry(ep->queue.next,
445 struct usba_request, queue);
446
447 bytecount = USBA_BFEXT(BYTE_COUNT, status);
448
449 if (status & (1 << 31))
450 is_complete = 1;
451 if (req->req.actual + bytecount >= req->req.length) {
452 is_complete = 1;
453 bytecount = req->req.length - req->req.actual;
454 }
455
456 memcpy_fromio(req->req.buf + req->req.actual,
457 ep->fifo, bytecount);
458 req->req.actual += bytecount;
459
460 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
461
462 if (is_complete) {
463 DBG(DBG_QUEUE, "%s: request done\n", ep->ep.name);
464 req->req.status = 0;
465 list_del_init(&req->queue);
466 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
467 spin_unlock(&udc->lock);
468 req->req.complete(&ep->ep, &req->req);
469 spin_lock(&udc->lock);
470 }
471
472 status = usba_ep_readl(ep, STA);
473 nr_busy = USBA_BFEXT(BUSY_BANKS, status);
474
475 if (is_complete && ep_is_control(ep)) {
476 send_status(udc, ep);
477 break;
478 }
479 }
480}
481
482static void
483request_complete(struct usba_ep *ep, struct usba_request *req, int status)
484{
485 struct usba_udc *udc = ep->udc;
486
487 WARN_ON(!list_empty(&req->queue));
488
489 if (req->req.status == -EINPROGRESS)
490 req->req.status = status;
491
492 if (req->mapped) {
493 dma_unmap_single(
494 &udc->pdev->dev, req->req.dma, req->req.length,
495 ep->is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
496 req->req.dma = DMA_ADDR_INVALID;
497 req->mapped = 0;
498 }
499
500 DBG(DBG_GADGET | DBG_REQ,
501 "%s: req %p complete: status %d, actual %u\n",
502 ep->ep.name, req, req->req.status, req->req.actual);
503
504 spin_unlock(&udc->lock);
505 req->req.complete(&ep->ep, &req->req);
506 spin_lock(&udc->lock);
507}
508
509static void
510request_complete_list(struct usba_ep *ep, struct list_head *list, int status)
511{
512 struct usba_request *req, *tmp_req;
513
514 list_for_each_entry_safe(req, tmp_req, list, queue) {
515 list_del_init(&req->queue);
516 request_complete(ep, req, status);
517 }
518}
519
520static int
521usba_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
522{
523 struct usba_ep *ep = to_usba_ep(_ep);
524 struct usba_udc *udc = ep->udc;
525 unsigned long flags, ept_cfg, maxpacket;
526 unsigned int nr_trans;
527
528 DBG(DBG_GADGET, "%s: ep_enable: desc=%p\n", ep->ep.name, desc);
529
530 maxpacket = usb_endpoint_maxp(desc) & 0x7ff;
531
532 if (((desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK) != ep->index)
533 || ep->index == 0
534 || desc->bDescriptorType != USB_DT_ENDPOINT
535 || maxpacket == 0
536 || maxpacket > ep->fifo_size) {
537 DBG(DBG_ERR, "ep_enable: Invalid argument");
538 return -EINVAL;
539 }
540
541 ep->is_isoc = 0;
542 ep->is_in = 0;
543
544 if (maxpacket <= 8)
545 ept_cfg = USBA_BF(EPT_SIZE, USBA_EPT_SIZE_8);
546 else
547
548 ept_cfg = USBA_BF(EPT_SIZE, fls(maxpacket - 1) - 3);
549
550 DBG(DBG_HW, "%s: EPT_SIZE = %lu (maxpacket = %lu)\n",
551 ep->ep.name, ept_cfg, maxpacket);
552
553 if (usb_endpoint_dir_in(desc)) {
554 ep->is_in = 1;
555 ept_cfg |= USBA_EPT_DIR_IN;
556 }
557
558 switch (usb_endpoint_type(desc)) {
559 case USB_ENDPOINT_XFER_CONTROL:
560 ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_CONTROL);
561 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_ONE);
562 break;
563 case USB_ENDPOINT_XFER_ISOC:
564 if (!ep->can_isoc) {
565 DBG(DBG_ERR, "ep_enable: %s is not isoc capable\n",
566 ep->ep.name);
567 return -EINVAL;
568 }
569
570
571
572
573
574 nr_trans = ((usb_endpoint_maxp(desc) >> 11) & 3) + 1;
575 if (nr_trans > 3)
576 return -EINVAL;
577
578 ep->is_isoc = 1;
579 ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_ISO);
580
581
582
583
584 if (nr_trans > 1 && ep->nr_banks == 3)
585 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_TRIPLE);
586 else
587 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_DOUBLE);
588 ept_cfg |= USBA_BF(NB_TRANS, nr_trans);
589 break;
590 case USB_ENDPOINT_XFER_BULK:
591 ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK);
592 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_DOUBLE);
593 break;
594 case USB_ENDPOINT_XFER_INT:
595 ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_INT);
596 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_DOUBLE);
597 break;
598 }
599
600 spin_lock_irqsave(&ep->udc->lock, flags);
601
602 if (ep->desc) {
603 spin_unlock_irqrestore(&ep->udc->lock, flags);
604 DBG(DBG_ERR, "ep%d already enabled\n", ep->index);
605 return -EBUSY;
606 }
607
608 ep->desc = desc;
609 ep->ep.maxpacket = maxpacket;
610
611 usba_ep_writel(ep, CFG, ept_cfg);
612 usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
613
614 if (ep->can_dma) {
615 u32 ctrl;
616
617 usba_writel(udc, INT_ENB,
618 (usba_readl(udc, INT_ENB)
619 | USBA_BF(EPT_INT, 1 << ep->index)
620 | USBA_BF(DMA_INT, 1 << ep->index)));
621 ctrl = USBA_AUTO_VALID | USBA_INTDIS_DMA;
622 usba_ep_writel(ep, CTL_ENB, ctrl);
623 } else {
624 usba_writel(udc, INT_ENB,
625 (usba_readl(udc, INT_ENB)
626 | USBA_BF(EPT_INT, 1 << ep->index)));
627 }
628
629 spin_unlock_irqrestore(&udc->lock, flags);
630
631 DBG(DBG_HW, "EPT_CFG%d after init: %#08lx\n", ep->index,
632 (unsigned long)usba_ep_readl(ep, CFG));
633 DBG(DBG_HW, "INT_ENB after init: %#08lx\n",
634 (unsigned long)usba_readl(udc, INT_ENB));
635
636 return 0;
637}
638
639static int usba_ep_disable(struct usb_ep *_ep)
640{
641 struct usba_ep *ep = to_usba_ep(_ep);
642 struct usba_udc *udc = ep->udc;
643 LIST_HEAD(req_list);
644 unsigned long flags;
645
646 DBG(DBG_GADGET, "ep_disable: %s\n", ep->ep.name);
647
648 spin_lock_irqsave(&udc->lock, flags);
649
650 if (!ep->desc) {
651 spin_unlock_irqrestore(&udc->lock, flags);
652
653
654
655
656 if (udc->gadget.speed != USB_SPEED_UNKNOWN)
657 DBG(DBG_ERR, "ep_disable: %s not enabled\n",
658 ep->ep.name);
659 return -EINVAL;
660 }
661 ep->desc = NULL;
662
663 list_splice_init(&ep->queue, &req_list);
664 if (ep->can_dma) {
665 usba_dma_writel(ep, CONTROL, 0);
666 usba_dma_writel(ep, ADDRESS, 0);
667 usba_dma_readl(ep, STATUS);
668 }
669 usba_ep_writel(ep, CTL_DIS, USBA_EPT_ENABLE);
670 usba_writel(udc, INT_ENB,
671 usba_readl(udc, INT_ENB)
672 & ~USBA_BF(EPT_INT, 1 << ep->index));
673
674 request_complete_list(ep, &req_list, -ESHUTDOWN);
675
676 spin_unlock_irqrestore(&udc->lock, flags);
677
678 return 0;
679}
680
681static struct usb_request *
682usba_ep_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
683{
684 struct usba_request *req;
685
686 DBG(DBG_GADGET, "ep_alloc_request: %p, 0x%x\n", _ep, gfp_flags);
687
688 req = kzalloc(sizeof(*req), gfp_flags);
689 if (!req)
690 return NULL;
691
692 INIT_LIST_HEAD(&req->queue);
693 req->req.dma = DMA_ADDR_INVALID;
694
695 return &req->req;
696}
697
698static void
699usba_ep_free_request(struct usb_ep *_ep, struct usb_request *_req)
700{
701 struct usba_request *req = to_usba_req(_req);
702
703 DBG(DBG_GADGET, "ep_free_request: %p, %p\n", _ep, _req);
704
705 kfree(req);
706}
707
708static int queue_dma(struct usba_udc *udc, struct usba_ep *ep,
709 struct usba_request *req, gfp_t gfp_flags)
710{
711 unsigned long flags;
712 int ret;
713
714 DBG(DBG_DMA, "%s: req l/%u d/%08x %c%c%c\n",
715 ep->ep.name, req->req.length, req->req.dma,
716 req->req.zero ? 'Z' : 'z',
717 req->req.short_not_ok ? 'S' : 's',
718 req->req.no_interrupt ? 'I' : 'i');
719
720 if (req->req.length > 0x10000) {
721
722 DBG(DBG_ERR, "invalid request length %u\n", req->req.length);
723 return -EINVAL;
724 }
725
726 req->using_dma = 1;
727
728 if (req->req.dma == DMA_ADDR_INVALID) {
729 req->req.dma = dma_map_single(
730 &udc->pdev->dev, req->req.buf, req->req.length,
731 ep->is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
732 req->mapped = 1;
733 } else {
734 dma_sync_single_for_device(
735 &udc->pdev->dev, req->req.dma, req->req.length,
736 ep->is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
737 req->mapped = 0;
738 }
739
740 req->ctrl = USBA_BF(DMA_BUF_LEN, req->req.length)
741 | USBA_DMA_CH_EN | USBA_DMA_END_BUF_IE
742 | USBA_DMA_END_TR_EN | USBA_DMA_END_TR_IE;
743
744 if (ep->is_in)
745 req->ctrl |= USBA_DMA_END_BUF_EN;
746
747
748
749
750
751
752 ret = -ESHUTDOWN;
753 spin_lock_irqsave(&udc->lock, flags);
754 if (ep->desc) {
755 if (list_empty(&ep->queue))
756 submit_request(ep, req);
757
758 list_add_tail(&req->queue, &ep->queue);
759 ret = 0;
760 }
761 spin_unlock_irqrestore(&udc->lock, flags);
762
763 return ret;
764}
765
766static int
767usba_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
768{
769 struct usba_request *req = to_usba_req(_req);
770 struct usba_ep *ep = to_usba_ep(_ep);
771 struct usba_udc *udc = ep->udc;
772 unsigned long flags;
773 int ret;
774
775 DBG(DBG_GADGET | DBG_QUEUE | DBG_REQ, "%s: queue req %p, len %u\n",
776 ep->ep.name, req, _req->length);
777
778 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN || !ep->desc)
779 return -ESHUTDOWN;
780
781 req->submitted = 0;
782 req->using_dma = 0;
783 req->last_transaction = 0;
784
785 _req->status = -EINPROGRESS;
786 _req->actual = 0;
787
788 if (ep->can_dma)
789 return queue_dma(udc, ep, req, gfp_flags);
790
791
792 ret = -ESHUTDOWN;
793 spin_lock_irqsave(&udc->lock, flags);
794 if (ep->desc) {
795 list_add_tail(&req->queue, &ep->queue);
796
797 if ((!ep_is_control(ep) && ep->is_in) ||
798 (ep_is_control(ep)
799 && (ep->state == DATA_STAGE_IN
800 || ep->state == STATUS_STAGE_IN)))
801 usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
802 else
803 usba_ep_writel(ep, CTL_ENB, USBA_RX_BK_RDY);
804 ret = 0;
805 }
806 spin_unlock_irqrestore(&udc->lock, flags);
807
808 return ret;
809}
810
811static void
812usba_update_req(struct usba_ep *ep, struct usba_request *req, u32 status)
813{
814 req->req.actual = req->req.length - USBA_BFEXT(DMA_BUF_LEN, status);
815}
816
817static int stop_dma(struct usba_ep *ep, u32 *pstatus)
818{
819 unsigned int timeout;
820 u32 status;
821
822
823
824
825
826 usba_dma_writel(ep, CONTROL, 0);
827
828
829 for (timeout = 40; timeout; --timeout) {
830 status = usba_dma_readl(ep, STATUS);
831 if (!(status & USBA_DMA_CH_EN))
832 break;
833 udelay(1);
834 }
835
836 if (pstatus)
837 *pstatus = status;
838
839 if (timeout == 0) {
840 dev_err(&ep->udc->pdev->dev,
841 "%s: timed out waiting for DMA FIFO to empty\n",
842 ep->ep.name);
843 return -ETIMEDOUT;
844 }
845
846 return 0;
847}
848
849static int usba_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
850{
851 struct usba_ep *ep = to_usba_ep(_ep);
852 struct usba_udc *udc = ep->udc;
853 struct usba_request *req = to_usba_req(_req);
854 unsigned long flags;
855 u32 status;
856
857 DBG(DBG_GADGET | DBG_QUEUE, "ep_dequeue: %s, req %p\n",
858 ep->ep.name, req);
859
860 spin_lock_irqsave(&udc->lock, flags);
861
862 if (req->using_dma) {
863
864
865
866
867 if (ep->queue.next == &req->queue) {
868 status = usba_dma_readl(ep, STATUS);
869 if (status & USBA_DMA_CH_EN)
870 stop_dma(ep, &status);
871
872#ifdef CONFIG_USB_GADGET_DEBUG_FS
873 ep->last_dma_status = status;
874#endif
875
876 usba_writel(udc, EPT_RST, 1 << ep->index);
877
878 usba_update_req(ep, req, status);
879 }
880 }
881
882
883
884
885
886 list_del_init(&req->queue);
887
888 request_complete(ep, req, -ECONNRESET);
889
890
891 submit_next_request(ep);
892 spin_unlock_irqrestore(&udc->lock, flags);
893
894 return 0;
895}
896
897static int usba_ep_set_halt(struct usb_ep *_ep, int value)
898{
899 struct usba_ep *ep = to_usba_ep(_ep);
900 struct usba_udc *udc = ep->udc;
901 unsigned long flags;
902 int ret = 0;
903
904 DBG(DBG_GADGET, "endpoint %s: %s HALT\n", ep->ep.name,
905 value ? "set" : "clear");
906
907 if (!ep->desc) {
908 DBG(DBG_ERR, "Attempted to halt uninitialized ep %s\n",
909 ep->ep.name);
910 return -ENODEV;
911 }
912 if (ep->is_isoc) {
913 DBG(DBG_ERR, "Attempted to halt isochronous ep %s\n",
914 ep->ep.name);
915 return -ENOTTY;
916 }
917
918 spin_lock_irqsave(&udc->lock, flags);
919
920
921
922
923
924 if (!list_empty(&ep->queue)
925 || ((value && ep->is_in && (usba_ep_readl(ep, STA)
926 & USBA_BF(BUSY_BANKS, -1L))))) {
927 ret = -EAGAIN;
928 } else {
929 if (value)
930 usba_ep_writel(ep, SET_STA, USBA_FORCE_STALL);
931 else
932 usba_ep_writel(ep, CLR_STA,
933 USBA_FORCE_STALL | USBA_TOGGLE_CLR);
934 usba_ep_readl(ep, STA);
935 }
936
937 spin_unlock_irqrestore(&udc->lock, flags);
938
939 return ret;
940}
941
942static int usba_ep_fifo_status(struct usb_ep *_ep)
943{
944 struct usba_ep *ep = to_usba_ep(_ep);
945
946 return USBA_BFEXT(BYTE_COUNT, usba_ep_readl(ep, STA));
947}
948
949static void usba_ep_fifo_flush(struct usb_ep *_ep)
950{
951 struct usba_ep *ep = to_usba_ep(_ep);
952 struct usba_udc *udc = ep->udc;
953
954 usba_writel(udc, EPT_RST, 1 << ep->index);
955}
956
957static const struct usb_ep_ops usba_ep_ops = {
958 .enable = usba_ep_enable,
959 .disable = usba_ep_disable,
960 .alloc_request = usba_ep_alloc_request,
961 .free_request = usba_ep_free_request,
962 .queue = usba_ep_queue,
963 .dequeue = usba_ep_dequeue,
964 .set_halt = usba_ep_set_halt,
965 .fifo_status = usba_ep_fifo_status,
966 .fifo_flush = usba_ep_fifo_flush,
967};
968
969static int usba_udc_get_frame(struct usb_gadget *gadget)
970{
971 struct usba_udc *udc = to_usba_udc(gadget);
972
973 return USBA_BFEXT(FRAME_NUMBER, usba_readl(udc, FNUM));
974}
975
976static int usba_udc_wakeup(struct usb_gadget *gadget)
977{
978 struct usba_udc *udc = to_usba_udc(gadget);
979 unsigned long flags;
980 u32 ctrl;
981 int ret = -EINVAL;
982
983 spin_lock_irqsave(&udc->lock, flags);
984 if (udc->devstatus & (1 << USB_DEVICE_REMOTE_WAKEUP)) {
985 ctrl = usba_readl(udc, CTRL);
986 usba_writel(udc, CTRL, ctrl | USBA_REMOTE_WAKE_UP);
987 ret = 0;
988 }
989 spin_unlock_irqrestore(&udc->lock, flags);
990
991 return ret;
992}
993
994static int
995usba_udc_set_selfpowered(struct usb_gadget *gadget, int is_selfpowered)
996{
997 struct usba_udc *udc = to_usba_udc(gadget);
998 unsigned long flags;
999
1000 spin_lock_irqsave(&udc->lock, flags);
1001 if (is_selfpowered)
1002 udc->devstatus |= 1 << USB_DEVICE_SELF_POWERED;
1003 else
1004 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1005 spin_unlock_irqrestore(&udc->lock, flags);
1006
1007 return 0;
1008}
1009
1010static int atmel_usba_start(struct usb_gadget_driver *driver,
1011 int (*bind)(struct usb_gadget *));
1012static int atmel_usba_stop(struct usb_gadget_driver *driver);
1013
1014static const struct usb_gadget_ops usba_udc_ops = {
1015 .get_frame = usba_udc_get_frame,
1016 .wakeup = usba_udc_wakeup,
1017 .set_selfpowered = usba_udc_set_selfpowered,
1018 .start = atmel_usba_start,
1019 .stop = atmel_usba_stop,
1020};
1021
1022static struct usb_endpoint_descriptor usba_ep0_desc = {
1023 .bLength = USB_DT_ENDPOINT_SIZE,
1024 .bDescriptorType = USB_DT_ENDPOINT,
1025 .bEndpointAddress = 0,
1026 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
1027 .wMaxPacketSize = cpu_to_le16(64),
1028
1029 .bInterval = 1,
1030};
1031
1032static void nop_release(struct device *dev)
1033{
1034
1035}
1036
1037static struct usba_udc the_udc = {
1038 .gadget = {
1039 .ops = &usba_udc_ops,
1040 .ep_list = LIST_HEAD_INIT(the_udc.gadget.ep_list),
1041 .is_dualspeed = 1,
1042 .name = "atmel_usba_udc",
1043 .dev = {
1044 .init_name = "gadget",
1045 .release = nop_release,
1046 },
1047 },
1048};
1049
1050
1051
1052
1053static void reset_all_endpoints(struct usba_udc *udc)
1054{
1055 struct usba_ep *ep;
1056 struct usba_request *req, *tmp_req;
1057
1058 usba_writel(udc, EPT_RST, ~0UL);
1059
1060 ep = to_usba_ep(udc->gadget.ep0);
1061 list_for_each_entry_safe(req, tmp_req, &ep->queue, queue) {
1062 list_del_init(&req->queue);
1063 request_complete(ep, req, -ECONNRESET);
1064 }
1065
1066
1067
1068
1069
1070
1071
1072 list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
1073 if (ep->desc) {
1074 spin_unlock(&udc->lock);
1075 usba_ep_disable(&ep->ep);
1076 spin_lock(&udc->lock);
1077 }
1078 }
1079}
1080
1081static struct usba_ep *get_ep_by_addr(struct usba_udc *udc, u16 wIndex)
1082{
1083 struct usba_ep *ep;
1084
1085 if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0)
1086 return to_usba_ep(udc->gadget.ep0);
1087
1088 list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list) {
1089 u8 bEndpointAddress;
1090
1091 if (!ep->desc)
1092 continue;
1093 bEndpointAddress = ep->desc->bEndpointAddress;
1094 if ((wIndex ^ bEndpointAddress) & USB_DIR_IN)
1095 continue;
1096 if ((bEndpointAddress & USB_ENDPOINT_NUMBER_MASK)
1097 == (wIndex & USB_ENDPOINT_NUMBER_MASK))
1098 return ep;
1099 }
1100
1101 return NULL;
1102}
1103
1104
1105static inline void set_protocol_stall(struct usba_udc *udc, struct usba_ep *ep)
1106{
1107 usba_ep_writel(ep, SET_STA, USBA_FORCE_STALL);
1108 ep->state = WAIT_FOR_SETUP;
1109}
1110
1111static inline int is_stalled(struct usba_udc *udc, struct usba_ep *ep)
1112{
1113 if (usba_ep_readl(ep, STA) & USBA_FORCE_STALL)
1114 return 1;
1115 return 0;
1116}
1117
1118static inline void set_address(struct usba_udc *udc, unsigned int addr)
1119{
1120 u32 regval;
1121
1122 DBG(DBG_BUS, "setting address %u...\n", addr);
1123 regval = usba_readl(udc, CTRL);
1124 regval = USBA_BFINS(DEV_ADDR, addr, regval);
1125 usba_writel(udc, CTRL, regval);
1126}
1127
1128static int do_test_mode(struct usba_udc *udc)
1129{
1130 static const char test_packet_buffer[] = {
1131
1132 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
1133
1134 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA,
1135
1136 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE,
1137
1138 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
1139 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
1140
1141 0x7F, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD,
1142
1143 0xFC, 0x7E, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD, 0x7E
1144 };
1145 struct usba_ep *ep;
1146 struct device *dev = &udc->pdev->dev;
1147 int test_mode;
1148
1149 test_mode = udc->test_mode;
1150
1151
1152 reset_all_endpoints(udc);
1153
1154 switch (test_mode) {
1155 case 0x0100:
1156
1157 usba_writel(udc, TST, USBA_TST_J_MODE);
1158 dev_info(dev, "Entering Test_J mode...\n");
1159 break;
1160 case 0x0200:
1161
1162 usba_writel(udc, TST, USBA_TST_K_MODE);
1163 dev_info(dev, "Entering Test_K mode...\n");
1164 break;
1165 case 0x0300:
1166
1167
1168
1169
1170 ep = &usba_ep[0];
1171 usba_writel(udc, TST,
1172 USBA_BF(SPEED_CFG, USBA_SPEED_CFG_FORCE_HIGH));
1173 usba_ep_writel(ep, CFG,
1174 USBA_BF(EPT_SIZE, USBA_EPT_SIZE_64)
1175 | USBA_EPT_DIR_IN
1176 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK)
1177 | USBA_BF(BK_NUMBER, 1));
1178 if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED)) {
1179 set_protocol_stall(udc, ep);
1180 dev_err(dev, "Test_SE0_NAK: ep0 not mapped\n");
1181 } else {
1182 usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
1183 dev_info(dev, "Entering Test_SE0_NAK mode...\n");
1184 }
1185 break;
1186 case 0x0400:
1187
1188 ep = &usba_ep[0];
1189 usba_ep_writel(ep, CFG,
1190 USBA_BF(EPT_SIZE, USBA_EPT_SIZE_64)
1191 | USBA_EPT_DIR_IN
1192 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK)
1193 | USBA_BF(BK_NUMBER, 1));
1194 if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED)) {
1195 set_protocol_stall(udc, ep);
1196 dev_err(dev, "Test_Packet: ep0 not mapped\n");
1197 } else {
1198 usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
1199 usba_writel(udc, TST, USBA_TST_PKT_MODE);
1200 memcpy_toio(ep->fifo, test_packet_buffer,
1201 sizeof(test_packet_buffer));
1202 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
1203 dev_info(dev, "Entering Test_Packet mode...\n");
1204 }
1205 break;
1206 default:
1207 dev_err(dev, "Invalid test mode: 0x%04x\n", test_mode);
1208 return -EINVAL;
1209 }
1210
1211 return 0;
1212}
1213
1214
1215static inline bool feature_is_dev_remote_wakeup(struct usb_ctrlrequest *crq)
1216{
1217 if (crq->wValue == cpu_to_le16(USB_DEVICE_REMOTE_WAKEUP))
1218 return true;
1219 return false;
1220}
1221
1222static inline bool feature_is_dev_test_mode(struct usb_ctrlrequest *crq)
1223{
1224 if (crq->wValue == cpu_to_le16(USB_DEVICE_TEST_MODE))
1225 return true;
1226 return false;
1227}
1228
1229static inline bool feature_is_ep_halt(struct usb_ctrlrequest *crq)
1230{
1231 if (crq->wValue == cpu_to_le16(USB_ENDPOINT_HALT))
1232 return true;
1233 return false;
1234}
1235
1236static int handle_ep0_setup(struct usba_udc *udc, struct usba_ep *ep,
1237 struct usb_ctrlrequest *crq)
1238{
1239 int retval = 0;
1240
1241 switch (crq->bRequest) {
1242 case USB_REQ_GET_STATUS: {
1243 u16 status;
1244
1245 if (crq->bRequestType == (USB_DIR_IN | USB_RECIP_DEVICE)) {
1246 status = cpu_to_le16(udc->devstatus);
1247 } else if (crq->bRequestType
1248 == (USB_DIR_IN | USB_RECIP_INTERFACE)) {
1249 status = cpu_to_le16(0);
1250 } else if (crq->bRequestType
1251 == (USB_DIR_IN | USB_RECIP_ENDPOINT)) {
1252 struct usba_ep *target;
1253
1254 target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1255 if (!target)
1256 goto stall;
1257
1258 status = 0;
1259 if (is_stalled(udc, target))
1260 status |= cpu_to_le16(1);
1261 } else
1262 goto delegate;
1263
1264
1265 if (crq->wLength != cpu_to_le16(sizeof(status)))
1266 goto stall;
1267 ep->state = DATA_STAGE_IN;
1268 __raw_writew(status, ep->fifo);
1269 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
1270 break;
1271 }
1272
1273 case USB_REQ_CLEAR_FEATURE: {
1274 if (crq->bRequestType == USB_RECIP_DEVICE) {
1275 if (feature_is_dev_remote_wakeup(crq))
1276 udc->devstatus
1277 &= ~(1 << USB_DEVICE_REMOTE_WAKEUP);
1278 else
1279
1280 goto stall;
1281 } else if (crq->bRequestType == USB_RECIP_ENDPOINT) {
1282 struct usba_ep *target;
1283
1284 if (crq->wLength != cpu_to_le16(0)
1285 || !feature_is_ep_halt(crq))
1286 goto stall;
1287 target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1288 if (!target)
1289 goto stall;
1290
1291 usba_ep_writel(target, CLR_STA, USBA_FORCE_STALL);
1292 if (target->index != 0)
1293 usba_ep_writel(target, CLR_STA,
1294 USBA_TOGGLE_CLR);
1295 } else {
1296 goto delegate;
1297 }
1298
1299 send_status(udc, ep);
1300 break;
1301 }
1302
1303 case USB_REQ_SET_FEATURE: {
1304 if (crq->bRequestType == USB_RECIP_DEVICE) {
1305 if (feature_is_dev_test_mode(crq)) {
1306 send_status(udc, ep);
1307 ep->state = STATUS_STAGE_TEST;
1308 udc->test_mode = le16_to_cpu(crq->wIndex);
1309 return 0;
1310 } else if (feature_is_dev_remote_wakeup(crq)) {
1311 udc->devstatus |= 1 << USB_DEVICE_REMOTE_WAKEUP;
1312 } else {
1313 goto stall;
1314 }
1315 } else if (crq->bRequestType == USB_RECIP_ENDPOINT) {
1316 struct usba_ep *target;
1317
1318 if (crq->wLength != cpu_to_le16(0)
1319 || !feature_is_ep_halt(crq))
1320 goto stall;
1321
1322 target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1323 if (!target)
1324 goto stall;
1325
1326 usba_ep_writel(target, SET_STA, USBA_FORCE_STALL);
1327 } else
1328 goto delegate;
1329
1330 send_status(udc, ep);
1331 break;
1332 }
1333
1334 case USB_REQ_SET_ADDRESS:
1335 if (crq->bRequestType != (USB_DIR_OUT | USB_RECIP_DEVICE))
1336 goto delegate;
1337
1338 set_address(udc, le16_to_cpu(crq->wValue));
1339 send_status(udc, ep);
1340 ep->state = STATUS_STAGE_ADDR;
1341 break;
1342
1343 default:
1344delegate:
1345 spin_unlock(&udc->lock);
1346 retval = udc->driver->setup(&udc->gadget, crq);
1347 spin_lock(&udc->lock);
1348 }
1349
1350 return retval;
1351
1352stall:
1353 pr_err("udc: %s: Invalid setup request: %02x.%02x v%04x i%04x l%d, "
1354 "halting endpoint...\n",
1355 ep->ep.name, crq->bRequestType, crq->bRequest,
1356 le16_to_cpu(crq->wValue), le16_to_cpu(crq->wIndex),
1357 le16_to_cpu(crq->wLength));
1358 set_protocol_stall(udc, ep);
1359 return -1;
1360}
1361
1362static void usba_control_irq(struct usba_udc *udc, struct usba_ep *ep)
1363{
1364 struct usba_request *req;
1365 u32 epstatus;
1366 u32 epctrl;
1367
1368restart:
1369 epstatus = usba_ep_readl(ep, STA);
1370 epctrl = usba_ep_readl(ep, CTL);
1371
1372 DBG(DBG_INT, "%s [%d]: s/%08x c/%08x\n",
1373 ep->ep.name, ep->state, epstatus, epctrl);
1374
1375 req = NULL;
1376 if (!list_empty(&ep->queue))
1377 req = list_entry(ep->queue.next,
1378 struct usba_request, queue);
1379
1380 if ((epctrl & USBA_TX_PK_RDY) && !(epstatus & USBA_TX_PK_RDY)) {
1381 if (req->submitted)
1382 next_fifo_transaction(ep, req);
1383 else
1384 submit_request(ep, req);
1385
1386 if (req->last_transaction) {
1387 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
1388 usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
1389 }
1390 goto restart;
1391 }
1392 if ((epstatus & epctrl) & USBA_TX_COMPLETE) {
1393 usba_ep_writel(ep, CLR_STA, USBA_TX_COMPLETE);
1394
1395 switch (ep->state) {
1396 case DATA_STAGE_IN:
1397 usba_ep_writel(ep, CTL_ENB, USBA_RX_BK_RDY);
1398 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1399 ep->state = STATUS_STAGE_OUT;
1400 break;
1401 case STATUS_STAGE_ADDR:
1402
1403 usba_writel(udc, CTRL, (usba_readl(udc, CTRL)
1404 | USBA_FADDR_EN));
1405 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1406 ep->state = WAIT_FOR_SETUP;
1407 break;
1408 case STATUS_STAGE_IN:
1409 if (req) {
1410 list_del_init(&req->queue);
1411 request_complete(ep, req, 0);
1412 submit_next_request(ep);
1413 }
1414 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1415 ep->state = WAIT_FOR_SETUP;
1416 break;
1417 case STATUS_STAGE_TEST:
1418 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1419 ep->state = WAIT_FOR_SETUP;
1420 if (do_test_mode(udc))
1421 set_protocol_stall(udc, ep);
1422 break;
1423 default:
1424 pr_err("udc: %s: TXCOMP: Invalid endpoint state %d, "
1425 "halting endpoint...\n",
1426 ep->ep.name, ep->state);
1427 set_protocol_stall(udc, ep);
1428 break;
1429 }
1430
1431 goto restart;
1432 }
1433 if ((epstatus & epctrl) & USBA_RX_BK_RDY) {
1434 switch (ep->state) {
1435 case STATUS_STAGE_OUT:
1436 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1437 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1438
1439 if (req) {
1440 list_del_init(&req->queue);
1441 request_complete(ep, req, 0);
1442 }
1443 ep->state = WAIT_FOR_SETUP;
1444 break;
1445
1446 case DATA_STAGE_OUT:
1447 receive_data(ep);
1448 break;
1449
1450 default:
1451 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1452 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1453 pr_err("udc: %s: RXRDY: Invalid endpoint state %d, "
1454 "halting endpoint...\n",
1455 ep->ep.name, ep->state);
1456 set_protocol_stall(udc, ep);
1457 break;
1458 }
1459
1460 goto restart;
1461 }
1462 if (epstatus & USBA_RX_SETUP) {
1463 union {
1464 struct usb_ctrlrequest crq;
1465 unsigned long data[2];
1466 } crq;
1467 unsigned int pkt_len;
1468 int ret;
1469
1470 if (ep->state != WAIT_FOR_SETUP) {
1471
1472
1473
1474
1475
1476 int status = -EPROTO;
1477
1478
1479
1480
1481
1482
1483 if (ep->state == STATUS_STAGE_OUT
1484 || ep->state == STATUS_STAGE_IN) {
1485 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1486 status = 0;
1487 }
1488
1489 if (req) {
1490 list_del_init(&req->queue);
1491 request_complete(ep, req, status);
1492 }
1493 }
1494
1495 pkt_len = USBA_BFEXT(BYTE_COUNT, usba_ep_readl(ep, STA));
1496 DBG(DBG_HW, "Packet length: %u\n", pkt_len);
1497 if (pkt_len != sizeof(crq)) {
1498 pr_warning("udc: Invalid packet length %u "
1499 "(expected %zu)\n", pkt_len, sizeof(crq));
1500 set_protocol_stall(udc, ep);
1501 return;
1502 }
1503
1504 DBG(DBG_FIFO, "Copying ctrl request from 0x%p:\n", ep->fifo);
1505 memcpy_fromio(crq.data, ep->fifo, sizeof(crq));
1506
1507
1508
1509 usba_ep_writel(ep, CLR_STA, USBA_RX_SETUP);
1510
1511
1512
1513
1514
1515 if (crq.crq.bRequestType & USB_DIR_IN) {
1516
1517
1518
1519
1520
1521
1522 ep->state = DATA_STAGE_IN;
1523 } else {
1524 if (crq.crq.wLength != cpu_to_le16(0))
1525 ep->state = DATA_STAGE_OUT;
1526 else
1527 ep->state = STATUS_STAGE_IN;
1528 }
1529
1530 ret = -1;
1531 if (ep->index == 0)
1532 ret = handle_ep0_setup(udc, ep, &crq.crq);
1533 else {
1534 spin_unlock(&udc->lock);
1535 ret = udc->driver->setup(&udc->gadget, &crq.crq);
1536 spin_lock(&udc->lock);
1537 }
1538
1539 DBG(DBG_BUS, "req %02x.%02x, length %d, state %d, ret %d\n",
1540 crq.crq.bRequestType, crq.crq.bRequest,
1541 le16_to_cpu(crq.crq.wLength), ep->state, ret);
1542
1543 if (ret < 0) {
1544
1545 set_protocol_stall(udc, ep);
1546 }
1547 }
1548}
1549
1550static void usba_ep_irq(struct usba_udc *udc, struct usba_ep *ep)
1551{
1552 struct usba_request *req;
1553 u32 epstatus;
1554 u32 epctrl;
1555
1556 epstatus = usba_ep_readl(ep, STA);
1557 epctrl = usba_ep_readl(ep, CTL);
1558
1559 DBG(DBG_INT, "%s: interrupt, status: 0x%08x\n", ep->ep.name, epstatus);
1560
1561 while ((epctrl & USBA_TX_PK_RDY) && !(epstatus & USBA_TX_PK_RDY)) {
1562 DBG(DBG_BUS, "%s: TX PK ready\n", ep->ep.name);
1563
1564 if (list_empty(&ep->queue)) {
1565 dev_warn(&udc->pdev->dev, "ep_irq: queue empty\n");
1566 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
1567 return;
1568 }
1569
1570 req = list_entry(ep->queue.next, struct usba_request, queue);
1571
1572 if (req->using_dma) {
1573
1574 usba_ep_writel(ep, SET_STA,
1575 USBA_TX_PK_RDY);
1576 usba_ep_writel(ep, CTL_DIS,
1577 USBA_TX_PK_RDY);
1578 list_del_init(&req->queue);
1579 submit_next_request(ep);
1580 request_complete(ep, req, 0);
1581 } else {
1582 if (req->submitted)
1583 next_fifo_transaction(ep, req);
1584 else
1585 submit_request(ep, req);
1586
1587 if (req->last_transaction) {
1588 list_del_init(&req->queue);
1589 submit_next_request(ep);
1590 request_complete(ep, req, 0);
1591 }
1592 }
1593
1594 epstatus = usba_ep_readl(ep, STA);
1595 epctrl = usba_ep_readl(ep, CTL);
1596 }
1597 if ((epstatus & epctrl) & USBA_RX_BK_RDY) {
1598 DBG(DBG_BUS, "%s: RX data ready\n", ep->ep.name);
1599 receive_data(ep);
1600 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1601 }
1602}
1603
1604static void usba_dma_irq(struct usba_udc *udc, struct usba_ep *ep)
1605{
1606 struct usba_request *req;
1607 u32 status, control, pending;
1608
1609 status = usba_dma_readl(ep, STATUS);
1610 control = usba_dma_readl(ep, CONTROL);
1611#ifdef CONFIG_USB_GADGET_DEBUG_FS
1612 ep->last_dma_status = status;
1613#endif
1614 pending = status & control;
1615 DBG(DBG_INT | DBG_DMA, "dma irq, s/%#08x, c/%#08x\n", status, control);
1616
1617 if (status & USBA_DMA_CH_EN) {
1618 dev_err(&udc->pdev->dev,
1619 "DMA_CH_EN is set after transfer is finished!\n");
1620 dev_err(&udc->pdev->dev,
1621 "status=%#08x, pending=%#08x, control=%#08x\n",
1622 status, pending, control);
1623
1624
1625
1626
1627
1628 }
1629
1630 if (list_empty(&ep->queue))
1631
1632 return;
1633
1634 if (pending & (USBA_DMA_END_TR_ST | USBA_DMA_END_BUF_ST)) {
1635 req = list_entry(ep->queue.next, struct usba_request, queue);
1636 usba_update_req(ep, req, status);
1637
1638 list_del_init(&req->queue);
1639 submit_next_request(ep);
1640 request_complete(ep, req, 0);
1641 }
1642}
1643
1644static irqreturn_t usba_udc_irq(int irq, void *devid)
1645{
1646 struct usba_udc *udc = devid;
1647 u32 status;
1648 u32 dma_status;
1649 u32 ep_status;
1650
1651 spin_lock(&udc->lock);
1652
1653 status = usba_readl(udc, INT_STA);
1654 DBG(DBG_INT, "irq, status=%#08x\n", status);
1655
1656 if (status & USBA_DET_SUSPEND) {
1657 toggle_bias(0);
1658 usba_writel(udc, INT_CLR, USBA_DET_SUSPEND);
1659 DBG(DBG_BUS, "Suspend detected\n");
1660 if (udc->gadget.speed != USB_SPEED_UNKNOWN
1661 && udc->driver && udc->driver->suspend) {
1662 spin_unlock(&udc->lock);
1663 udc->driver->suspend(&udc->gadget);
1664 spin_lock(&udc->lock);
1665 }
1666 }
1667
1668 if (status & USBA_WAKE_UP) {
1669 toggle_bias(1);
1670 usba_writel(udc, INT_CLR, USBA_WAKE_UP);
1671 DBG(DBG_BUS, "Wake Up CPU detected\n");
1672 }
1673
1674 if (status & USBA_END_OF_RESUME) {
1675 usba_writel(udc, INT_CLR, USBA_END_OF_RESUME);
1676 DBG(DBG_BUS, "Resume detected\n");
1677 if (udc->gadget.speed != USB_SPEED_UNKNOWN
1678 && udc->driver && udc->driver->resume) {
1679 spin_unlock(&udc->lock);
1680 udc->driver->resume(&udc->gadget);
1681 spin_lock(&udc->lock);
1682 }
1683 }
1684
1685 dma_status = USBA_BFEXT(DMA_INT, status);
1686 if (dma_status) {
1687 int i;
1688
1689 for (i = 1; i < USBA_NR_ENDPOINTS; i++)
1690 if (dma_status & (1 << i))
1691 usba_dma_irq(udc, &usba_ep[i]);
1692 }
1693
1694 ep_status = USBA_BFEXT(EPT_INT, status);
1695 if (ep_status) {
1696 int i;
1697
1698 for (i = 0; i < USBA_NR_ENDPOINTS; i++)
1699 if (ep_status & (1 << i)) {
1700 if (ep_is_control(&usba_ep[i]))
1701 usba_control_irq(udc, &usba_ep[i]);
1702 else
1703 usba_ep_irq(udc, &usba_ep[i]);
1704 }
1705 }
1706
1707 if (status & USBA_END_OF_RESET) {
1708 struct usba_ep *ep0;
1709
1710 usba_writel(udc, INT_CLR, USBA_END_OF_RESET);
1711 reset_all_endpoints(udc);
1712
1713 if (udc->gadget.speed != USB_SPEED_UNKNOWN
1714 && udc->driver->disconnect) {
1715 udc->gadget.speed = USB_SPEED_UNKNOWN;
1716 spin_unlock(&udc->lock);
1717 udc->driver->disconnect(&udc->gadget);
1718 spin_lock(&udc->lock);
1719 }
1720
1721 if (status & USBA_HIGH_SPEED)
1722 udc->gadget.speed = USB_SPEED_HIGH;
1723 else
1724 udc->gadget.speed = USB_SPEED_FULL;
1725 DBG(DBG_BUS, "%s bus reset detected\n",
1726 usb_speed_string(udc->gadget.speed));
1727
1728 ep0 = &usba_ep[0];
1729 ep0->desc = &usba_ep0_desc;
1730 ep0->state = WAIT_FOR_SETUP;
1731 usba_ep_writel(ep0, CFG,
1732 (USBA_BF(EPT_SIZE, EP0_EPT_SIZE)
1733 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_CONTROL)
1734 | USBA_BF(BK_NUMBER, USBA_BK_NUMBER_ONE)));
1735 usba_ep_writel(ep0, CTL_ENB,
1736 USBA_EPT_ENABLE | USBA_RX_SETUP);
1737 usba_writel(udc, INT_ENB,
1738 (usba_readl(udc, INT_ENB)
1739 | USBA_BF(EPT_INT, 1)
1740 | USBA_DET_SUSPEND
1741 | USBA_END_OF_RESUME));
1742
1743
1744
1745
1746
1747 if (!(usba_ep_readl(ep0, CFG) & USBA_EPT_MAPPED))
1748 dev_dbg(&udc->pdev->dev,
1749 "ODD: EP0 configuration is invalid!\n");
1750 }
1751
1752 spin_unlock(&udc->lock);
1753
1754 return IRQ_HANDLED;
1755}
1756
1757static irqreturn_t usba_vbus_irq(int irq, void *devid)
1758{
1759 struct usba_udc *udc = devid;
1760 int vbus;
1761
1762
1763 udelay(10);
1764
1765 spin_lock(&udc->lock);
1766
1767
1768 if (!udc->driver)
1769 goto out;
1770
1771 vbus = vbus_is_present(udc);
1772 if (vbus != udc->vbus_prev) {
1773 if (vbus) {
1774 toggle_bias(1);
1775 usba_writel(udc, CTRL, USBA_ENABLE_MASK);
1776 usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
1777 } else {
1778 udc->gadget.speed = USB_SPEED_UNKNOWN;
1779 reset_all_endpoints(udc);
1780 toggle_bias(0);
1781 usba_writel(udc, CTRL, USBA_DISABLE_MASK);
1782 if (udc->driver->disconnect) {
1783 spin_unlock(&udc->lock);
1784 udc->driver->disconnect(&udc->gadget);
1785 spin_lock(&udc->lock);
1786 }
1787 }
1788 udc->vbus_prev = vbus;
1789 }
1790
1791out:
1792 spin_unlock(&udc->lock);
1793
1794 return IRQ_HANDLED;
1795}
1796
1797static int atmel_usba_start(struct usb_gadget_driver *driver,
1798 int (*bind)(struct usb_gadget *))
1799{
1800 struct usba_udc *udc = &the_udc;
1801 unsigned long flags;
1802 int ret;
1803
1804 if (!udc->pdev)
1805 return -ENODEV;
1806
1807 spin_lock_irqsave(&udc->lock, flags);
1808 if (udc->driver) {
1809 spin_unlock_irqrestore(&udc->lock, flags);
1810 return -EBUSY;
1811 }
1812
1813 udc->devstatus = 1 << USB_DEVICE_SELF_POWERED;
1814 udc->driver = driver;
1815 udc->gadget.dev.driver = &driver->driver;
1816 spin_unlock_irqrestore(&udc->lock, flags);
1817
1818 clk_enable(udc->pclk);
1819 clk_enable(udc->hclk);
1820
1821 ret = bind(&udc->gadget);
1822 if (ret) {
1823 DBG(DBG_ERR, "Could not bind to driver %s: error %d\n",
1824 driver->driver.name, ret);
1825 goto err_driver_bind;
1826 }
1827
1828 DBG(DBG_GADGET, "registered driver `%s'\n", driver->driver.name);
1829
1830 udc->vbus_prev = 0;
1831 if (gpio_is_valid(udc->vbus_pin))
1832 enable_irq(gpio_to_irq(udc->vbus_pin));
1833
1834
1835 spin_lock_irqsave(&udc->lock, flags);
1836 if (vbus_is_present(udc) && udc->vbus_prev == 0) {
1837 toggle_bias(1);
1838 usba_writel(udc, CTRL, USBA_ENABLE_MASK);
1839 usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
1840 }
1841 spin_unlock_irqrestore(&udc->lock, flags);
1842
1843 return 0;
1844
1845err_driver_bind:
1846 udc->driver = NULL;
1847 udc->gadget.dev.driver = NULL;
1848 return ret;
1849}
1850
1851static int atmel_usba_stop(struct usb_gadget_driver *driver)
1852{
1853 struct usba_udc *udc = &the_udc;
1854 unsigned long flags;
1855
1856 if (!udc->pdev)
1857 return -ENODEV;
1858 if (driver != udc->driver || !driver->unbind)
1859 return -EINVAL;
1860
1861 if (gpio_is_valid(udc->vbus_pin))
1862 disable_irq(gpio_to_irq(udc->vbus_pin));
1863
1864 spin_lock_irqsave(&udc->lock, flags);
1865 udc->gadget.speed = USB_SPEED_UNKNOWN;
1866 reset_all_endpoints(udc);
1867 spin_unlock_irqrestore(&udc->lock, flags);
1868
1869
1870 toggle_bias(0);
1871 usba_writel(udc, CTRL, USBA_DISABLE_MASK);
1872
1873 if (udc->driver->disconnect)
1874 udc->driver->disconnect(&udc->gadget);
1875
1876 driver->unbind(&udc->gadget);
1877 udc->gadget.dev.driver = NULL;
1878 udc->driver = NULL;
1879
1880 clk_disable(udc->hclk);
1881 clk_disable(udc->pclk);
1882
1883 DBG(DBG_GADGET, "unregistered driver `%s'\n", driver->driver.name);
1884
1885 return 0;
1886}
1887
1888static int __init usba_udc_probe(struct platform_device *pdev)
1889{
1890 struct usba_platform_data *pdata = pdev->dev.platform_data;
1891 struct resource *regs, *fifo;
1892 struct clk *pclk, *hclk;
1893 struct usba_udc *udc = &the_udc;
1894 int irq, ret, i;
1895
1896 regs = platform_get_resource(pdev, IORESOURCE_MEM, CTRL_IOMEM_ID);
1897 fifo = platform_get_resource(pdev, IORESOURCE_MEM, FIFO_IOMEM_ID);
1898 if (!regs || !fifo || !pdata)
1899 return -ENXIO;
1900
1901 irq = platform_get_irq(pdev, 0);
1902 if (irq < 0)
1903 return irq;
1904
1905 pclk = clk_get(&pdev->dev, "pclk");
1906 if (IS_ERR(pclk))
1907 return PTR_ERR(pclk);
1908 hclk = clk_get(&pdev->dev, "hclk");
1909 if (IS_ERR(hclk)) {
1910 ret = PTR_ERR(hclk);
1911 goto err_get_hclk;
1912 }
1913
1914 spin_lock_init(&udc->lock);
1915 udc->pdev = pdev;
1916 udc->pclk = pclk;
1917 udc->hclk = hclk;
1918 udc->vbus_pin = -ENODEV;
1919
1920 ret = -ENOMEM;
1921 udc->regs = ioremap(regs->start, resource_size(regs));
1922 if (!udc->regs) {
1923 dev_err(&pdev->dev, "Unable to map I/O memory, aborting.\n");
1924 goto err_map_regs;
1925 }
1926 dev_info(&pdev->dev, "MMIO registers at 0x%08lx mapped at %p\n",
1927 (unsigned long)regs->start, udc->regs);
1928 udc->fifo = ioremap(fifo->start, resource_size(fifo));
1929 if (!udc->fifo) {
1930 dev_err(&pdev->dev, "Unable to map FIFO, aborting.\n");
1931 goto err_map_fifo;
1932 }
1933 dev_info(&pdev->dev, "FIFO at 0x%08lx mapped at %p\n",
1934 (unsigned long)fifo->start, udc->fifo);
1935
1936 device_initialize(&udc->gadget.dev);
1937 udc->gadget.dev.parent = &pdev->dev;
1938 udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
1939
1940 platform_set_drvdata(pdev, udc);
1941
1942
1943 clk_enable(pclk);
1944 toggle_bias(0);
1945 usba_writel(udc, CTRL, USBA_DISABLE_MASK);
1946 clk_disable(pclk);
1947
1948 usba_ep = kzalloc(sizeof(struct usba_ep) * pdata->num_ep,
1949 GFP_KERNEL);
1950 if (!usba_ep)
1951 goto err_alloc_ep;
1952
1953 the_udc.gadget.ep0 = &usba_ep[0].ep;
1954
1955 INIT_LIST_HEAD(&usba_ep[0].ep.ep_list);
1956 usba_ep[0].ep_regs = udc->regs + USBA_EPT_BASE(0);
1957 usba_ep[0].dma_regs = udc->regs + USBA_DMA_BASE(0);
1958 usba_ep[0].fifo = udc->fifo + USBA_FIFO_BASE(0);
1959 usba_ep[0].ep.ops = &usba_ep_ops;
1960 usba_ep[0].ep.name = pdata->ep[0].name;
1961 usba_ep[0].ep.maxpacket = pdata->ep[0].fifo_size;
1962 usba_ep[0].udc = &the_udc;
1963 INIT_LIST_HEAD(&usba_ep[0].queue);
1964 usba_ep[0].fifo_size = pdata->ep[0].fifo_size;
1965 usba_ep[0].nr_banks = pdata->ep[0].nr_banks;
1966 usba_ep[0].index = pdata->ep[0].index;
1967 usba_ep[0].can_dma = pdata->ep[0].can_dma;
1968 usba_ep[0].can_isoc = pdata->ep[0].can_isoc;
1969
1970 for (i = 1; i < pdata->num_ep; i++) {
1971 struct usba_ep *ep = &usba_ep[i];
1972
1973 ep->ep_regs = udc->regs + USBA_EPT_BASE(i);
1974 ep->dma_regs = udc->regs + USBA_DMA_BASE(i);
1975 ep->fifo = udc->fifo + USBA_FIFO_BASE(i);
1976 ep->ep.ops = &usba_ep_ops;
1977 ep->ep.name = pdata->ep[i].name;
1978 ep->ep.maxpacket = pdata->ep[i].fifo_size;
1979 ep->udc = &the_udc;
1980 INIT_LIST_HEAD(&ep->queue);
1981 ep->fifo_size = pdata->ep[i].fifo_size;
1982 ep->nr_banks = pdata->ep[i].nr_banks;
1983 ep->index = pdata->ep[i].index;
1984 ep->can_dma = pdata->ep[i].can_dma;
1985 ep->can_isoc = pdata->ep[i].can_isoc;
1986
1987 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
1988 }
1989
1990 ret = request_irq(irq, usba_udc_irq, 0, "atmel_usba_udc", udc);
1991 if (ret) {
1992 dev_err(&pdev->dev, "Cannot request irq %d (error %d)\n",
1993 irq, ret);
1994 goto err_request_irq;
1995 }
1996 udc->irq = irq;
1997
1998 ret = device_add(&udc->gadget.dev);
1999 if (ret) {
2000 dev_dbg(&pdev->dev, "Could not add gadget: %d\n", ret);
2001 goto err_device_add;
2002 }
2003
2004 if (gpio_is_valid(pdata->vbus_pin)) {
2005 if (!gpio_request(pdata->vbus_pin, "atmel_usba_udc")) {
2006 udc->vbus_pin = pdata->vbus_pin;
2007 udc->vbus_pin_inverted = pdata->vbus_pin_inverted;
2008
2009 ret = request_irq(gpio_to_irq(udc->vbus_pin),
2010 usba_vbus_irq, 0,
2011 "atmel_usba_udc", udc);
2012 if (ret) {
2013 gpio_free(udc->vbus_pin);
2014 udc->vbus_pin = -ENODEV;
2015 dev_warn(&udc->pdev->dev,
2016 "failed to request vbus irq; "
2017 "assuming always on\n");
2018 } else {
2019 disable_irq(gpio_to_irq(udc->vbus_pin));
2020 }
2021 } else {
2022
2023 udc->vbus_pin = -EINVAL;
2024 }
2025 }
2026
2027 ret = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
2028 if (ret)
2029 goto err_add_udc;
2030
2031 usba_init_debugfs(udc);
2032 for (i = 1; i < pdata->num_ep; i++)
2033 usba_ep_init_debugfs(udc, &usba_ep[i]);
2034
2035 return 0;
2036
2037err_add_udc:
2038 if (gpio_is_valid(pdata->vbus_pin)) {
2039 free_irq(gpio_to_irq(udc->vbus_pin), udc);
2040 gpio_free(udc->vbus_pin);
2041 }
2042
2043 device_unregister(&udc->gadget.dev);
2044
2045err_device_add:
2046 free_irq(irq, udc);
2047err_request_irq:
2048 kfree(usba_ep);
2049err_alloc_ep:
2050 iounmap(udc->fifo);
2051err_map_fifo:
2052 iounmap(udc->regs);
2053err_map_regs:
2054 clk_put(hclk);
2055err_get_hclk:
2056 clk_put(pclk);
2057
2058 platform_set_drvdata(pdev, NULL);
2059
2060 return ret;
2061}
2062
2063static int __exit usba_udc_remove(struct platform_device *pdev)
2064{
2065 struct usba_udc *udc;
2066 int i;
2067 struct usba_platform_data *pdata = pdev->dev.platform_data;
2068
2069 udc = platform_get_drvdata(pdev);
2070
2071 usb_del_gadget_udc(&udc->gadget);
2072
2073 for (i = 1; i < pdata->num_ep; i++)
2074 usba_ep_cleanup_debugfs(&usba_ep[i]);
2075 usba_cleanup_debugfs(udc);
2076
2077 if (gpio_is_valid(udc->vbus_pin)) {
2078 free_irq(gpio_to_irq(udc->vbus_pin), udc);
2079 gpio_free(udc->vbus_pin);
2080 }
2081
2082 free_irq(udc->irq, udc);
2083 kfree(usba_ep);
2084 iounmap(udc->fifo);
2085 iounmap(udc->regs);
2086 clk_put(udc->hclk);
2087 clk_put(udc->pclk);
2088
2089 device_unregister(&udc->gadget.dev);
2090
2091 return 0;
2092}
2093
2094static struct platform_driver udc_driver = {
2095 .remove = __exit_p(usba_udc_remove),
2096 .driver = {
2097 .name = "atmel_usba_udc",
2098 .owner = THIS_MODULE,
2099 },
2100};
2101
2102static int __init udc_init(void)
2103{
2104 return platform_driver_probe(&udc_driver, usba_udc_probe);
2105}
2106module_init(udc_init);
2107
2108static void __exit udc_exit(void)
2109{
2110 platform_driver_unregister(&udc_driver);
2111}
2112module_exit(udc_exit);
2113
2114MODULE_DESCRIPTION("Atmel USBA UDC driver");
2115MODULE_AUTHOR("Haavard Skinnemoen (Atmel)");
2116MODULE_LICENSE("GPL");
2117MODULE_ALIAS("platform:atmel_usba_udc");
2118
