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USB: Nikon D40X unusual_devs entry
[mirror_ubuntu-bionic-kernel.git] / drivers / usb / gadget / atmel_usba_udc.c
CommitLineData
914a3f3b
HS		 1/*
2 * Driver for the Atmel USBA high speed USB device controller
3 *
4 * Copyright (C) 2005-2007 Atmel Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
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/device.h>
16#include <linux/dma-mapping.h>
17#include <linux/list.h>
18#include <linux/platform_device.h>
19#include <linux/usb/ch9.h>
20#include <linux/usb/gadget.h>
21#include <linux/delay.h>
22
23#include <asm/gpio.h>
24#include <asm/arch/board.h>
25
26#include "atmel_usba_udc.h"
27
28
29static struct usba_udc the_udc;
30
31#ifdef CONFIG_USB_GADGET_DEBUG_FS
32#include <linux/debugfs.h>
33#include <linux/uaccess.h>
34
35static int queue_dbg_open(struct inode *inode, struct file *file)
36{
37 struct usba_ep *ep = inode->i_private;
38 struct usba_request *req, *req_copy;
39 struct list_head *queue_data;
40
41 queue_data = kmalloc(sizeof(*queue_data), GFP_KERNEL);
42 if (!queue_data)
43 return -ENOMEM;
44 INIT_LIST_HEAD(queue_data);
45
46 spin_lock_irq(&ep->udc->lock);
47 list_for_each_entry(req, &ep->queue, queue) {
48 req_copy = kmalloc(sizeof(*req_copy), GFP_ATOMIC);
49 if (!req_copy)
50 goto fail;
51 memcpy(req_copy, req, sizeof(*req_copy));
52 list_add_tail(&req_copy->queue, queue_data);
53 }
54 spin_unlock_irq(&ep->udc->lock);
55
56 file->private_data = queue_data;
57 return 0;
58
59fail:
60 spin_unlock_irq(&ep->udc->lock);
61 list_for_each_entry_safe(req, req_copy, queue_data, queue) {
62 list_del(&req->queue);
63 kfree(req);
64 }
65 kfree(queue_data);
66 return -ENOMEM;
67}
68
69/*
70 * bbbbbbbb llllllll IZS sssss nnnn FDL\n\0
71 *
72 * b: buffer address
73 * l: buffer length
74 * I/i: interrupt/no interrupt
75 * Z/z: zero/no zero
76 * S/s: short ok/short not ok
77 * s: status
78 * n: nr_packets
79 * F/f: submitted/not submitted to FIFO
80 * D/d: using/not using DMA
81 * L/l: last transaction/not last transaction
82 */
83static ssize_t queue_dbg_read(struct file *file, char __user *buf,
84 size_t nbytes, loff_t *ppos)
85{
86 struct list_head *queue = file->private_data;
87 struct usba_request *req, *tmp_req;
88 size_t len, remaining, actual = 0;
89 char tmpbuf[38];
90
91 if (!access_ok(VERIFY_WRITE, buf, nbytes))
92 return -EFAULT;
93
94 mutex_lock(&file->f_dentry->d_inode->i_mutex);
95 list_for_each_entry_safe(req, tmp_req, queue, queue) {
96 len = snprintf(tmpbuf, sizeof(tmpbuf),
97 "%8p %08x %c%c%c %5d %c%c%c\n",
98 req->req.buf, req->req.length,
99 req->req.no_interrupt ? 'i' : 'I',
100 req->req.zero ? 'Z' : 'z',
101 req->req.short_not_ok ? 's' : 'S',
102 req->req.status,
103 req->submitted ? 'F' : 'f',
104 req->using_dma ? 'D' : 'd',
105 req->last_transaction ? 'L' : 'l');
106 len = min(len, sizeof(tmpbuf));
107 if (len > nbytes)
108 break;
109
110 list_del(&req->queue);
111 kfree(req);
112
113 remaining = __copy_to_user(buf, tmpbuf, len);
114 actual += len - remaining;
115 if (remaining)
116 break;
117
118 nbytes -= len;
119 buf += len;
120 }
121 mutex_unlock(&file->f_dentry->d_inode->i_mutex);
122
123 return actual;
124}
125
126static int queue_dbg_release(struct inode *inode, struct file *file)
127{
128 struct list_head *queue_data = file->private_data;
129 struct usba_request *req, *tmp_req;
130
131 list_for_each_entry_safe(req, tmp_req, queue_data, queue) {
132 list_del(&req->queue);
133 kfree(req);
134 }
135 kfree(queue_data);
136 return 0;
137}
138
139static int regs_dbg_open(struct inode *inode, struct file *file)
140{
141 struct usba_udc *udc;
142 unsigned int i;
143 u32 *data;
144 int ret = -ENOMEM;
145
146 mutex_lock(&inode->i_mutex);
147 udc = inode->i_private;
148 data = kmalloc(inode->i_size, GFP_KERNEL);
149 if (!data)
150 goto out;
151
152 spin_lock_irq(&udc->lock);
153 for (i = 0; i < inode->i_size / 4; i++)
154 data[i] = __raw_readl(udc->regs + i * 4);
155 spin_unlock_irq(&udc->lock);
156
157 file->private_data = data;
158 ret = 0;
159
160out:
161 mutex_unlock(&inode->i_mutex);
162
163 return ret;
164}
165
166static ssize_t regs_dbg_read(struct file *file, char __user *buf,
167 size_t nbytes, loff_t *ppos)
168{
169 struct inode *inode = file->f_dentry->d_inode;
170 int ret;
171
172 mutex_lock(&inode->i_mutex);
173 ret = simple_read_from_buffer(buf, nbytes, ppos,
174 file->private_data,
175 file->f_dentry->d_inode->i_size);
176 mutex_unlock(&inode->i_mutex);
177
178 return ret;
179}
180
181static int regs_dbg_release(struct inode *inode, struct file *file)
182{
183 kfree(file->private_data);
184 return 0;
185}
186
187const struct file_operations queue_dbg_fops = {
188 .owner = THIS_MODULE,
189 .open = queue_dbg_open,
190 .llseek = no_llseek,
191 .read = queue_dbg_read,
192 .release = queue_dbg_release,
193};
194
195const struct file_operations regs_dbg_fops = {
196 .owner = THIS_MODULE,
197 .open = regs_dbg_open,
198 .llseek = generic_file_llseek,
199 .read = regs_dbg_read,
200 .release = regs_dbg_release,
201};
202
203static void usba_ep_init_debugfs(struct usba_udc *udc,
204 struct usba_ep *ep)
205{
206 struct dentry *ep_root;
207
208 ep_root = debugfs_create_dir(ep->ep.name, udc->debugfs_root);
209 if (!ep_root)
210 goto err_root;
211 ep->debugfs_dir = ep_root;
212
213 ep->debugfs_queue = debugfs_create_file("queue", 0400, ep_root,
214 ep, &queue_dbg_fops);
215 if (!ep->debugfs_queue)
216 goto err_queue;
217
218 if (ep->can_dma) {
219 ep->debugfs_dma_status
220 = debugfs_create_u32("dma_status", 0400, ep_root,
221 &ep->last_dma_status);
222 if (!ep->debugfs_dma_status)
223 goto err_dma_status;
224 }
225 if (ep_is_control(ep)) {
226 ep->debugfs_state
227 = debugfs_create_u32("state", 0400, ep_root,
228 &ep->state);
229 if (!ep->debugfs_state)
230 goto err_state;
231 }
232
233 return;
234
235err_state:
236 if (ep->can_dma)
237 debugfs_remove(ep->debugfs_dma_status);
238err_dma_status:
239 debugfs_remove(ep->debugfs_queue);
240err_queue:
241 debugfs_remove(ep_root);
242err_root:
243 dev_err(&ep->udc->pdev->dev,
244 "failed to create debugfs directory for %s\n", ep->ep.name);
245}
246
247static void usba_ep_cleanup_debugfs(struct usba_ep *ep)
248{
249 debugfs_remove(ep->debugfs_queue);
250 debugfs_remove(ep->debugfs_dma_status);
251 debugfs_remove(ep->debugfs_state);
252 debugfs_remove(ep->debugfs_dir);
253 ep->debugfs_dma_status = NULL;
254 ep->debugfs_dir = NULL;
255}
256
257static void usba_init_debugfs(struct usba_udc *udc)
258{
259 struct dentry *root, *regs;
260 struct resource *regs_resource;
261
262 root = debugfs_create_dir(udc->gadget.name, NULL);
263 if (IS_ERR(root) || !root)
264 goto err_root;
265 udc->debugfs_root = root;
266
267 regs = debugfs_create_file("regs", 0400, root, udc, &regs_dbg_fops);
268 if (!regs)
269 goto err_regs;
270
271 regs_resource = platform_get_resource(udc->pdev, IORESOURCE_MEM,
272 CTRL_IOMEM_ID);
273 regs->d_inode->i_size = regs_resource->end - regs_resource->start + 1;
274 udc->debugfs_regs = regs;
275
276 usba_ep_init_debugfs(udc, to_usba_ep(udc->gadget.ep0));
277
278 return;
279
280err_regs:
281 debugfs_remove(root);
282err_root:
283 udc->debugfs_root = NULL;
284 dev_err(&udc->pdev->dev, "debugfs is not available\n");
285}
286
287static void usba_cleanup_debugfs(struct usba_udc *udc)
288{
289 usba_ep_cleanup_debugfs(to_usba_ep(udc->gadget.ep0));
290 debugfs_remove(udc->debugfs_regs);
291 debugfs_remove(udc->debugfs_root);
292 udc->debugfs_regs = NULL;
293 udc->debugfs_root = NULL;
294}
295#else
296static inline void usba_ep_init_debugfs(struct usba_udc *udc,
297 struct usba_ep *ep)
298{
299
300}
301
302static inline void usba_ep_cleanup_debugfs(struct usba_ep *ep)
303{
304
305}
306
307static inline void usba_init_debugfs(struct usba_udc *udc)
308{
309
310}
311
312static inline void usba_cleanup_debugfs(struct usba_udc *udc)
313{
314
315}
316#endif
317
318static int vbus_is_present(struct usba_udc *udc)
319{
320 if (udc->vbus_pin != -1)
321 return gpio_get_value(udc->vbus_pin);
322
323 /* No Vbus detection: Assume always present */
324 return 1;
325}
326
327static void copy_to_fifo(void __iomem *fifo, const void *buf, int len)
328{
329 unsigned long tmp;
330
331 DBG(DBG_FIFO, "copy to FIFO (len %d):\n", len);
332 for (; len > 0; len -= 4, buf += 4, fifo += 4) {
333 tmp = *(unsigned long *)buf;
334 if (len >= 4) {
335 DBG(DBG_FIFO, " -> %08lx\n", tmp);
336 __raw_writel(tmp, fifo);
337 } else {
338 do {
339 DBG(DBG_FIFO, " -> %02lx\n", tmp >> 24);
340 __raw_writeb(tmp >> 24, fifo);
341 fifo++;
342 tmp <<= 8;
343 } while (--len);
344 break;
345 }
346 }
347}
348
349static void copy_from_fifo(void *buf, void __iomem *fifo, int len)
350{
351 union {
352 unsigned long *w;
353 unsigned char *b;
354 } p;
355 unsigned long tmp;
356
357 DBG(DBG_FIFO, "copy from FIFO (len %d):\n", len);
358 for (p.w = buf; len > 0; len -= 4, p.w++, fifo += 4) {
359 if (len >= 4) {
360 tmp = __raw_readl(fifo);
361 *p.w = tmp;
362 DBG(DBG_FIFO, " -> %08lx\n", tmp);
363 } else {
364 do {
365 tmp = __raw_readb(fifo);
366 *p.b = tmp;
367 DBG(DBG_FIFO, " -> %02lx\n", tmp);
368 fifo++, p.b++;
369 } while (--len);
370 }
371 }
372}
373
374static void next_fifo_transaction(struct usba_ep *ep, struct usba_request *req)
375{
376 unsigned int transaction_len;
377
378 transaction_len = req->req.length - req->req.actual;
379 req->last_transaction = 1;
380 if (transaction_len > ep->ep.maxpacket) {
381 transaction_len = ep->ep.maxpacket;
382 req->last_transaction = 0;
383 } else if (transaction_len == ep->ep.maxpacket && req->req.zero)
384 req->last_transaction = 0;
385
386 DBG(DBG_QUEUE, "%s: submit_transaction, req %p (length %d)%s\n",
387 ep->ep.name, req, transaction_len,
388 req->last_transaction ? ", done" : "");
389
390 copy_to_fifo(ep->fifo, req->req.buf + req->req.actual, transaction_len);
391 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
392 req->req.actual += transaction_len;
393}
394
395static void submit_request(struct usba_ep *ep, struct usba_request *req)
396{
397 DBG(DBG_QUEUE, "%s: submit_request: req %p (length %d)\n",
398 ep->ep.name, req, req->req.length);
399
400 req->req.actual = 0;
401 req->submitted = 1;
402
403 if (req->using_dma) {
404 if (req->req.length == 0) {
405 usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
406 return;
407 }
408
409 if (req->req.zero)
410 usba_ep_writel(ep, CTL_ENB, USBA_SHORT_PACKET);
411 else
412 usba_ep_writel(ep, CTL_DIS, USBA_SHORT_PACKET);
413
414 usba_dma_writel(ep, ADDRESS, req->req.dma);
415 usba_dma_writel(ep, CONTROL, req->ctrl);
416 } else {
417 next_fifo_transaction(ep, req);
418 if (req->last_transaction) {
419 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
420 usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
421 } else {
422 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
423 usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
424 }
425 }
426}
427
428static void submit_next_request(struct usba_ep *ep)
429{
430 struct usba_request *req;
431
432 if (list_empty(&ep->queue)) {
433 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY | USBA_RX_BK_RDY);
434 return;
435 }
436
437 req = list_entry(ep->queue.next, struct usba_request, queue);
438 if (!req->submitted)
439 submit_request(ep, req);
440}
441
442static void send_status(struct usba_udc *udc, struct usba_ep *ep)
443{
444 ep->state = STATUS_STAGE_IN;
445 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
446 usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
447}
448
449static void receive_data(struct usba_ep *ep)
450{
451 struct usba_udc *udc = ep->udc;
452 struct usba_request *req;
453 unsigned long status;
454 unsigned int bytecount, nr_busy;
455 int is_complete = 0;
456
457 status = usba_ep_readl(ep, STA);
458 nr_busy = USBA_BFEXT(BUSY_BANKS, status);
459
460 DBG(DBG_QUEUE, "receive data: nr_busy=%u\n", nr_busy);
461
462 while (nr_busy > 0) {
463 if (list_empty(&ep->queue)) {
464 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
465 break;
466 }
467 req = list_entry(ep->queue.next,
468 struct usba_request, queue);
469
470 bytecount = USBA_BFEXT(BYTE_COUNT, status);
471
472 if (status & (1 << 31))
473 is_complete = 1;
474 if (req->req.actual + bytecount >= req->req.length) {
475 is_complete = 1;
476 bytecount = req->req.length - req->req.actual;
477 }
478
479 copy_from_fifo(req->req.buf + req->req.actual,
480 ep->fifo, bytecount);
481 req->req.actual += bytecount;
482
483 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
484
485 if (is_complete) {
486 DBG(DBG_QUEUE, "%s: request done\n", ep->ep.name);
487 req->req.status = 0;
488 list_del_init(&req->queue);
489 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
490 spin_unlock(&udc->lock);
491 req->req.complete(&ep->ep, &req->req);
492 spin_lock(&udc->lock);
493 }
494
495 status = usba_ep_readl(ep, STA);
496 nr_busy = USBA_BFEXT(BUSY_BANKS, status);
497
498 if (is_complete && ep_is_control(ep)) {
499 send_status(udc, ep);
500 break;
501 }
502 }
503}
504
505static void
506request_complete(struct usba_ep *ep, struct usba_request *req, int status)
507{
508 struct usba_udc *udc = ep->udc;
509
510 WARN_ON(!list_empty(&req->queue));
511
512 if (req->req.status == -EINPROGRESS)
513 req->req.status = status;
514
515 if (req->mapped) {
516 dma_unmap_single(
517 &udc->pdev->dev, req->req.dma, req->req.length,
518 ep->is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
519 req->req.dma = DMA_ADDR_INVALID;
520 req->mapped = 0;
521 }
522
523 DBG(DBG_GADGET | DBG_REQ,
524 "%s: req %p complete: status %d, actual %u\n",
525 ep->ep.name, req, req->req.status, req->req.actual);
526
527 spin_unlock(&udc->lock);
528 req->req.complete(&ep->ep, &req->req);
529 spin_lock(&udc->lock);
530}
531
532static void
533request_complete_list(struct usba_ep *ep, struct list_head *list, int status)
534{
535 struct usba_request *req, *tmp_req;
536
537 list_for_each_entry_safe(req, tmp_req, list, queue) {
538 list_del_init(&req->queue);
539 request_complete(ep, req, status);
540 }
541}
542
543static int
544usba_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
545{
546 struct usba_ep *ep = to_usba_ep(_ep);
547 struct usba_udc *udc = ep->udc;
548 unsigned long flags, ept_cfg, maxpacket;
549 unsigned int nr_trans;
550
551 DBG(DBG_GADGET, "%s: ep_enable: desc=%p\n", ep->ep.name, desc);
552
553 maxpacket = le16_to_cpu(desc->wMaxPacketSize) & 0x7ff;
554
555 if (((desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK) != ep->index)
556 || ep->index == 0
557 || desc->bDescriptorType != USB_DT_ENDPOINT
558 || maxpacket == 0
559 || maxpacket > ep->fifo_size) {
560 DBG(DBG_ERR, "ep_enable: Invalid argument");
561 return -EINVAL;
562 }
563
564 ep->is_isoc = 0;
565 ep->is_in = 0;
566
567 if (maxpacket <= 8)
568 ept_cfg = USBA_BF(EPT_SIZE, USBA_EPT_SIZE_8);
569 else
570 /* LSB is bit 1, not 0 */
571 ept_cfg = USBA_BF(EPT_SIZE, fls(maxpacket - 1) - 3);
572
573 DBG(DBG_HW, "%s: EPT_SIZE = %lu (maxpacket = %lu)\n",
574 ep->ep.name, ept_cfg, maxpacket);
575
576 if ((desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) {
577 ep->is_in = 1;
578 ept_cfg |= USBA_EPT_DIR_IN;
579 }
580
581 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
582 case USB_ENDPOINT_XFER_CONTROL:
583 ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_CONTROL);
584 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_ONE);
585 break;
586 case USB_ENDPOINT_XFER_ISOC:
587 if (!ep->can_isoc) {
588 DBG(DBG_ERR, "ep_enable: %s is not isoc capable\n",
589 ep->ep.name);
590 return -EINVAL;
591 }
592
593 /*
594 * Bits 11:12 specify number of _additional_
595 * transactions per microframe.
596 */
597 nr_trans = ((le16_to_cpu(desc->wMaxPacketSize) >> 11) & 3) + 1;
598 if (nr_trans > 3)
599 return -EINVAL;
600
601 ep->is_isoc = 1;
602 ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_ISO);
603
604 /*
605 * Do triple-buffering on high-bandwidth iso endpoints.
606 */
607 if (nr_trans > 1 && ep->nr_banks == 3)
608 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_TRIPLE);
609 else
610 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_DOUBLE);
611 ept_cfg |= USBA_BF(NB_TRANS, nr_trans);
612 break;
613 case USB_ENDPOINT_XFER_BULK:
614 ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK);
615 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_DOUBLE);
616 break;
617 case USB_ENDPOINT_XFER_INT:
618 ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_INT);
619 ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_DOUBLE);
620 break;
621 }
622
623 spin_lock_irqsave(&ep->udc->lock, flags);
624
625 if (ep->desc) {
626 spin_unlock_irqrestore(&ep->udc->lock, flags);
627 DBG(DBG_ERR, "ep%d already enabled\n", ep->index);
628 return -EBUSY;
629 }
630
631 ep->desc = desc;
632 ep->ep.maxpacket = maxpacket;
633
634 usba_ep_writel(ep, CFG, ept_cfg);
635 usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
636
637 if (ep->can_dma) {
638 u32 ctrl;
639
640 usba_writel(udc, INT_ENB,
641 (usba_readl(udc, INT_ENB)
642 | USBA_BF(EPT_INT, 1 << ep->index)
643 | USBA_BF(DMA_INT, 1 << ep->index)));
644 ctrl = USBA_AUTO_VALID | USBA_INTDIS_DMA;
645 usba_ep_writel(ep, CTL_ENB, ctrl);
646 } else {
647 usba_writel(udc, INT_ENB,
648 (usba_readl(udc, INT_ENB)
649 | USBA_BF(EPT_INT, 1 << ep->index)));
650 }
651
652 spin_unlock_irqrestore(&udc->lock, flags);
653
654 DBG(DBG_HW, "EPT_CFG%d after init: %#08lx\n", ep->index,
655 (unsigned long)usba_ep_readl(ep, CFG));
656 DBG(DBG_HW, "INT_ENB after init: %#08lx\n",
657 (unsigned long)usba_readl(udc, INT_ENB));
658
659 return 0;
660}
661
662static int usba_ep_disable(struct usb_ep *_ep)
663{
664 struct usba_ep *ep = to_usba_ep(_ep);
665 struct usba_udc *udc = ep->udc;
666 LIST_HEAD(req_list);
667 unsigned long flags;
668
669 DBG(DBG_GADGET, "ep_disable: %s\n", ep->ep.name);
670
671 spin_lock_irqsave(&udc->lock, flags);
672
673 if (!ep->desc) {
674 spin_unlock_irqrestore(&udc->lock, flags);
675 DBG(DBG_ERR, "ep_disable: %s not enabled\n", ep->ep.name);
676 return -EINVAL;
677 }
678 ep->desc = NULL;
679
680 list_splice_init(&ep->queue, &req_list);
681 if (ep->can_dma) {
682 usba_dma_writel(ep, CONTROL, 0);
683 usba_dma_writel(ep, ADDRESS, 0);
684 usba_dma_readl(ep, STATUS);
685 }
686 usba_ep_writel(ep, CTL_DIS, USBA_EPT_ENABLE);
687 usba_writel(udc, INT_ENB,
688 usba_readl(udc, INT_ENB)
689 & ~USBA_BF(EPT_INT, 1 << ep->index));
690
691 request_complete_list(ep, &req_list, -ESHUTDOWN);
692
693 spin_unlock_irqrestore(&udc->lock, flags);
694
695 return 0;
696}
697
698static struct usb_request *
699usba_ep_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
700{
701 struct usba_request *req;
702
703 DBG(DBG_GADGET, "ep_alloc_request: %p, 0x%x\n", _ep, gfp_flags);
704
705 req = kzalloc(sizeof(*req), gfp_flags);
706 if (!req)
707 return NULL;
708
709 INIT_LIST_HEAD(&req->queue);
710 req->req.dma = DMA_ADDR_INVALID;
711
712 return &req->req;
713}
714
715static void
716usba_ep_free_request(struct usb_ep *_ep, struct usb_request *_req)
717{
718 struct usba_request *req = to_usba_req(_req);
719
720 DBG(DBG_GADGET, "ep_free_request: %p, %p\n", _ep, _req);
721
722 kfree(req);
723}
724
725static int queue_dma(struct usba_udc *udc, struct usba_ep *ep,
726 struct usba_request *req, gfp_t gfp_flags)
727{
728 unsigned long flags;
729 int ret;
730
731 DBG(DBG_DMA, "%s: req l/%u d/%08x %c%c%c\n",
732 ep->ep.name, req->req.length, req->req.dma,
733 req->req.zero ? 'Z' : 'z',
734 req->req.short_not_ok ? 'S' : 's',
735 req->req.no_interrupt ? 'I' : 'i');
736
737 if (req->req.length > 0x10000) {
738 /* Lengths from 0 to 65536 (inclusive) are supported */
739 DBG(DBG_ERR, "invalid request length %u\n", req->req.length);
740 return -EINVAL;
741 }
742
743 req->using_dma = 1;
744
745 if (req->req.dma == DMA_ADDR_INVALID) {
746 req->req.dma = dma_map_single(
747 &udc->pdev->dev, req->req.buf, req->req.length,
748 ep->is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
749 req->mapped = 1;
750 } else {
751 dma_sync_single_for_device(
752 &udc->pdev->dev, req->req.dma, req->req.length,
753 ep->is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
754 req->mapped = 0;
755 }
756
757 req->ctrl = USBA_BF(DMA_BUF_LEN, req->req.length)
758 | USBA_DMA_CH_EN | USBA_DMA_END_BUF_IE
759 | USBA_DMA_END_TR_EN | USBA_DMA_END_TR_IE;
760
761 if (ep->is_in)
762 req->ctrl |= USBA_DMA_END_BUF_EN;
763
764 /*
765 * Add this request to the queue and submit for DMA if
766 * possible. Check if we're still alive first -- we may have
767 * received a reset since last time we checked.
768 */
769 ret = -ESHUTDOWN;
770 spin_lock_irqsave(&udc->lock, flags);
771 if (ep->desc) {
772 if (list_empty(&ep->queue))
773 submit_request(ep, req);
774
775 list_add_tail(&req->queue, &ep->queue);
776 ret = 0;
777 }
778 spin_unlock_irqrestore(&udc->lock, flags);
779
780 return ret;
781}
782
783static int
784usba_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
785{
786 struct usba_request *req = to_usba_req(_req);
787 struct usba_ep *ep = to_usba_ep(_ep);
788 struct usba_udc *udc = ep->udc;
789 unsigned long flags;
790 int ret;
791
792 DBG(DBG_GADGET | DBG_QUEUE | DBG_REQ, "%s: queue req %p, len %u\n",
793 ep->ep.name, req, _req->length);
794
795 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN || !ep->desc)
796 return -ESHUTDOWN;
797
798 req->submitted = 0;
799 req->using_dma = 0;
800 req->last_transaction = 0;
801
802 _req->status = -EINPROGRESS;
803 _req->actual = 0;
804
805 if (ep->can_dma)
806 return queue_dma(udc, ep, req, gfp_flags);
807
808 /* May have received a reset since last time we checked */
809 ret = -ESHUTDOWN;
810 spin_lock_irqsave(&udc->lock, flags);
811 if (ep->desc) {
812 list_add_tail(&req->queue, &ep->queue);
813
814 if (ep->is_in || (ep_is_control(ep)
815 && (ep->state == DATA_STAGE_IN
816 || ep->state == STATUS_STAGE_IN)))
817 usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
818 else
819 usba_ep_writel(ep, CTL_ENB, USBA_RX_BK_RDY);
820 ret = 0;
821 }
822 spin_unlock_irqrestore(&udc->lock, flags);
823
824 return ret;
825}
826
827static void
828usba_update_req(struct usba_ep *ep, struct usba_request *req, u32 status)
829{
830 req->req.actual = req->req.length - USBA_BFEXT(DMA_BUF_LEN, status);
831}
832
833static int stop_dma(struct usba_ep *ep, u32 *pstatus)
834{
835 unsigned int timeout;
836 u32 status;
837
838 /*
839 * Stop the DMA controller. When writing both CH_EN
840 * and LINK to 0, the other bits are not affected.
841 */
842 usba_dma_writel(ep, CONTROL, 0);
843
844 /* Wait for the FIFO to empty */
845 for (timeout = 40; timeout; --timeout) {
846 status = usba_dma_readl(ep, STATUS);
847 if (!(status & USBA_DMA_CH_EN))
848 break;
849 udelay(1);
850 }
851
852 if (pstatus)
853 *pstatus = status;
854
855 if (timeout == 0) {
856 dev_err(&ep->udc->pdev->dev,
857 "%s: timed out waiting for DMA FIFO to empty\n",
858 ep->ep.name);
859 return -ETIMEDOUT;
860 }
861
862 return 0;
863}
864
865static int usba_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
866{
867 struct usba_ep *ep = to_usba_ep(_ep);
868 struct usba_udc *udc = ep->udc;
869 struct usba_request *req = to_usba_req(_req);
870 unsigned long flags;
871 u32 status;
872
873 DBG(DBG_GADGET | DBG_QUEUE, "ep_dequeue: %s, req %p\n",
874 ep->ep.name, req);
875
876 spin_lock_irqsave(&udc->lock, flags);
877
878 if (req->using_dma) {
879 /*
880 * If this request is currently being transferred,
881 * stop the DMA controller and reset the FIFO.
882 */
883 if (ep->queue.next == &req->queue) {
884 status = usba_dma_readl(ep, STATUS);
885 if (status & USBA_DMA_CH_EN)
886 stop_dma(ep, &status);
887
888#ifdef CONFIG_USB_GADGET_DEBUG_FS
889 ep->last_dma_status = status;
890#endif
891
892 usba_writel(udc, EPT_RST, 1 << ep->index);
893
894 usba_update_req(ep, req, status);
895 }
896 }
897
898 /*
899 * Errors should stop the queue from advancing until the
900 * completion function returns.
901 */
902 list_del_init(&req->queue);
903
904 request_complete(ep, req, -ECONNRESET);
905
906 /* Process the next request if any */
907 submit_next_request(ep);
908 spin_unlock_irqrestore(&udc->lock, flags);
909
910 return 0;
911}
912
913static int usba_ep_set_halt(struct usb_ep *_ep, int value)
914{
915 struct usba_ep *ep = to_usba_ep(_ep);
916 struct usba_udc *udc = ep->udc;
917 unsigned long flags;
918 int ret = 0;
919
920 DBG(DBG_GADGET, "endpoint %s: %s HALT\n", ep->ep.name,
921 value ? "set" : "clear");
922
923 if (!ep->desc) {
924 DBG(DBG_ERR, "Attempted to halt uninitialized ep %s\n",
925 ep->ep.name);
926 return -ENODEV;
927 }
928 if (ep->is_isoc) {
929 DBG(DBG_ERR, "Attempted to halt isochronous ep %s\n",
930 ep->ep.name);
931 return -ENOTTY;
932 }
933
934 spin_lock_irqsave(&udc->lock, flags);
935
936 /*
937 * We can't halt IN endpoints while there are still data to be
938 * transferred
939 */
940 if (!list_empty(&ep->queue)
941 || ((value && ep->is_in && (usba_ep_readl(ep, STA)
942 & USBA_BF(BUSY_BANKS, -1L))))) {
943 ret = -EAGAIN;
944 } else {
945 if (value)
946 usba_ep_writel(ep, SET_STA, USBA_FORCE_STALL);
947 else
948 usba_ep_writel(ep, CLR_STA,
949 USBA_FORCE_STALL | USBA_TOGGLE_CLR);
950 usba_ep_readl(ep, STA);
951 }
952
953 spin_unlock_irqrestore(&udc->lock, flags);
954
955 return ret;
956}
957
958static int usba_ep_fifo_status(struct usb_ep *_ep)
959{
960 struct usba_ep *ep = to_usba_ep(_ep);
961
962 return USBA_BFEXT(BYTE_COUNT, usba_ep_readl(ep, STA));
963}
964
965static void usba_ep_fifo_flush(struct usb_ep *_ep)
966{
967 struct usba_ep *ep = to_usba_ep(_ep);
968 struct usba_udc *udc = ep->udc;
969
970 usba_writel(udc, EPT_RST, 1 << ep->index);
971}
972
973static const struct usb_ep_ops usba_ep_ops = {
974 .enable = usba_ep_enable,
975 .disable = usba_ep_disable,
976 .alloc_request = usba_ep_alloc_request,
977 .free_request = usba_ep_free_request,
978 .queue = usba_ep_queue,
979 .dequeue = usba_ep_dequeue,
980 .set_halt = usba_ep_set_halt,
981 .fifo_status = usba_ep_fifo_status,
982 .fifo_flush = usba_ep_fifo_flush,
983};
984
985static int usba_udc_get_frame(struct usb_gadget *gadget)
986{
987 struct usba_udc *udc = to_usba_udc(gadget);
988
989 return USBA_BFEXT(FRAME_NUMBER, usba_readl(udc, FNUM));
990}
991
992static const struct usb_gadget_ops usba_udc_ops = {
993 .get_frame = usba_udc_get_frame,
994};
995
996#define EP(nam, idx, maxpkt, maxbk, dma, isoc) \
997{ \
998 .ep = { \
999 .ops = &usba_ep_ops, \
1000 .name = nam, \
1001 .maxpacket = maxpkt, \
1002 }, \
1003 .udc = &the_udc, \
1004 .queue = LIST_HEAD_INIT(usba_ep[idx].queue), \
1005 .fifo_size = maxpkt, \
1006 .nr_banks = maxbk, \
1007 .index = idx, \
1008 .can_dma = dma, \
1009 .can_isoc = isoc, \
1010}
1011
1012static struct usba_ep usba_ep[] = {
1013 EP("ep0", 0, 64, 1, 0, 0),
1014 EP("ep1in-bulk", 1, 512, 2, 1, 1),
1015 EP("ep2out-bulk", 2, 512, 2, 1, 1),
1016 EP("ep3in-int", 3, 64, 3, 1, 0),
1017 EP("ep4out-int", 4, 64, 3, 1, 0),
1018 EP("ep5in-iso", 5, 1024, 3, 1, 1),
1019 EP("ep6out-iso", 6, 1024, 3, 1, 1),
1020};
1021#undef EP
1022
1023static struct usb_endpoint_descriptor usba_ep0_desc = {
1024 .bLength = USB_DT_ENDPOINT_SIZE,
1025 .bDescriptorType = USB_DT_ENDPOINT,
1026 .bEndpointAddress = 0,
1027 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
1028 .wMaxPacketSize = __constant_cpu_to_le16(64),
1029 /* FIXME: I have no idea what to put here */
1030 .bInterval = 1,
1031};
1032
1033static void nop_release(struct device *dev)
1034{
1035
1036}
1037
1038static struct usba_udc the_udc = {
1039 .gadget = {
1040 .ops = &usba_udc_ops,
1041 .ep0 = &usba_ep[0].ep,
1042 .ep_list = LIST_HEAD_INIT(the_udc.gadget.ep_list),
1043 .is_dualspeed = 1,
1044 .name = "atmel_usba_udc",
1045 .dev = {
1046 .bus_id = "gadget",
1047 .release = nop_release,
1048 },
1049 },
1050
1051 .lock = SPIN_LOCK_UNLOCKED,
1052};
1053
1054/*
1055 * Called with interrupts disabled and udc->lock held.
1056 */
1057static void reset_all_endpoints(struct usba_udc *udc)
1058{
1059 struct usba_ep *ep;
1060 struct usba_request *req, *tmp_req;
1061
1062 usba_writel(udc, EPT_RST, ~0UL);
1063
1064 ep = to_usba_ep(udc->gadget.ep0);
1065 list_for_each_entry_safe(req, tmp_req, &ep->queue, queue) {
1066 list_del_init(&req->queue);
1067 request_complete(ep, req, -ECONNRESET);
1068 }
1069
1070 list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
1071 if (ep->desc)
1072 usba_ep_disable(&ep->ep);
1073 }
1074}
1075
1076static struct usba_ep *get_ep_by_addr(struct usba_udc *udc, u16 wIndex)
1077{
1078 struct usba_ep *ep;
1079
1080 if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0)
1081 return to_usba_ep(udc->gadget.ep0);
1082
1083 list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list) {
1084 u8 bEndpointAddress;
1085
1086 if (!ep->desc)
1087 continue;
1088 bEndpointAddress = ep->desc->bEndpointAddress;
1089 if ((wIndex ^ bEndpointAddress) & USB_DIR_IN)
1090 continue;
1091 if ((bEndpointAddress & USB_ENDPOINT_NUMBER_MASK)
1092 == (wIndex & USB_ENDPOINT_NUMBER_MASK))
1093 return ep;
1094 }
1095
1096 return NULL;
1097}
1098
1099/* Called with interrupts disabled and udc->lock held */
1100static inline void set_protocol_stall(struct usba_udc *udc, struct usba_ep *ep)
1101{
1102 usba_ep_writel(ep, SET_STA, USBA_FORCE_STALL);
1103 ep->state = WAIT_FOR_SETUP;
1104}
1105
1106static inline int is_stalled(struct usba_udc *udc, struct usba_ep *ep)
1107{
1108 if (usba_ep_readl(ep, STA) & USBA_FORCE_STALL)
1109 return 1;
1110 return 0;
1111}
1112
1113static inline void set_address(struct usba_udc *udc, unsigned int addr)
1114{
1115 u32 regval;
1116
1117 DBG(DBG_BUS, "setting address %u...\n", addr);
1118 regval = usba_readl(udc, CTRL);
1119 regval = USBA_BFINS(DEV_ADDR, addr, regval);
1120 usba_writel(udc, CTRL, regval);
1121}
1122
1123static int do_test_mode(struct usba_udc *udc)
1124{
1125 static const char test_packet_buffer[] = {
1126 /* JKJKJKJK * 9 */
1127 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
1128 /* JJKKJJKK * 8 */
1129 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA,
1130 /* JJKKJJKK * 8 */
1131 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE,
1132 /* JJJJJJJKKKKKKK * 8 */
1133 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
1134 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
1135 /* JJJJJJJK * 8 */
1136 0x7F, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD,
1137 /* {JKKKKKKK * 10}, JK */
1138 0xFC, 0x7E, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD, 0x7E
1139 };
1140 struct usba_ep *ep;
1141 struct device *dev = &udc->pdev->dev;
1142 int test_mode;
1143
1144 test_mode = udc->test_mode;
1145
1146 /* Start from a clean slate */
1147 reset_all_endpoints(udc);
1148
1149 switch (test_mode) {
1150 case 0x0100:
1151 /* Test_J */
1152 usba_writel(udc, TST, USBA_TST_J_MODE);
1153 dev_info(dev, "Entering Test_J mode...\n");
1154 break;
1155 case 0x0200:
1156 /* Test_K */
1157 usba_writel(udc, TST, USBA_TST_K_MODE);
1158 dev_info(dev, "Entering Test_K mode...\n");
1159 break;
1160 case 0x0300:
1161 /*
1162 * Test_SE0_NAK: Force high-speed mode and set up ep0
1163 * for Bulk IN transfers
1164 */
1165 ep = &usba_ep[0];
1166 usba_writel(udc, TST,
1167 USBA_BF(SPEED_CFG, USBA_SPEED_CFG_FORCE_HIGH));
1168 usba_ep_writel(ep, CFG,
1169 USBA_BF(EPT_SIZE, USBA_EPT_SIZE_64)
1170 | USBA_EPT_DIR_IN
1171 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK)
1172 | USBA_BF(BK_NUMBER, 1));
1173 if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED)) {
1174 set_protocol_stall(udc, ep);
1175 dev_err(dev, "Test_SE0_NAK: ep0 not mapped\n");
1176 } else {
1177 usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
1178 dev_info(dev, "Entering Test_SE0_NAK mode...\n");
1179 }
1180 break;
1181 case 0x0400:
1182 /* Test_Packet */
1183 ep = &usba_ep[0];
1184 usba_ep_writel(ep, CFG,
1185 USBA_BF(EPT_SIZE, USBA_EPT_SIZE_64)
1186 | USBA_EPT_DIR_IN
1187 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK)
1188 | USBA_BF(BK_NUMBER, 1));
1189 if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED)) {
1190 set_protocol_stall(udc, ep);
1191 dev_err(dev, "Test_Packet: ep0 not mapped\n");
1192 } else {
1193 usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
1194 usba_writel(udc, TST, USBA_TST_PKT_MODE);
1195 copy_to_fifo(ep->fifo, test_packet_buffer,
1196 sizeof(test_packet_buffer));
1197 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
1198 dev_info(dev, "Entering Test_Packet mode...\n");
1199 }
1200 break;
1201 default:
1202 dev_err(dev, "Invalid test mode: 0x%04x\n", test_mode);
1203 return -EINVAL;
1204 }
1205
1206 return 0;
1207}
1208
1209/* Avoid overly long expressions */
1210static inline bool feature_is_dev_remote_wakeup(struct usb_ctrlrequest *crq)
1211{
1212 if (crq->wValue == __constant_cpu_to_le16(USB_DEVICE_REMOTE_WAKEUP))
1213 return true;
1214 return false;
1215}
1216
1217static inline bool feature_is_dev_test_mode(struct usb_ctrlrequest *crq)
1218{
1219 if (crq->wValue == __constant_cpu_to_le16(USB_DEVICE_TEST_MODE))
1220 return true;
1221 return false;
1222}
1223
1224static inline bool feature_is_ep_halt(struct usb_ctrlrequest *crq)
1225{
1226 if (crq->wValue == __constant_cpu_to_le16(USB_ENDPOINT_HALT))
1227 return true;
1228 return false;
1229}
1230
1231static int handle_ep0_setup(struct usba_udc *udc, struct usba_ep *ep,
1232 struct usb_ctrlrequest *crq)
1233{
1234 int retval = 0;;
1235
1236 switch (crq->bRequest) {
1237 case USB_REQ_GET_STATUS: {
1238 u16 status;
1239
1240 if (crq->bRequestType == (USB_DIR_IN | USB_RECIP_DEVICE)) {
1241 /* Self-powered, no remote wakeup */
1242 status = __constant_cpu_to_le16(1 << 0);
1243 } else if (crq->bRequestType
1244 == (USB_DIR_IN | USB_RECIP_INTERFACE)) {
1245 status = __constant_cpu_to_le16(0);
1246 } else if (crq->bRequestType
1247 == (USB_DIR_IN | USB_RECIP_ENDPOINT)) {
1248 struct usba_ep *target;
1249
1250 target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1251 if (!target)
1252 goto stall;
1253
1254 status = 0;
1255 if (is_stalled(udc, target))
1256 status |= __constant_cpu_to_le16(1);
1257 } else
1258 goto delegate;
1259
1260 /* Write directly to the FIFO. No queueing is done. */
1261 if (crq->wLength != __constant_cpu_to_le16(sizeof(status)))
1262 goto stall;
1263 ep->state = DATA_STAGE_IN;
1264 __raw_writew(status, ep->fifo);
1265 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
1266 break;
1267 }
1268
1269 case USB_REQ_CLEAR_FEATURE: {
1270 if (crq->bRequestType == USB_RECIP_DEVICE) {
1271 if (feature_is_dev_remote_wakeup(crq)) {
1272 /* TODO: Handle REMOTE_WAKEUP */
1273 } else {
1274 /* Can't CLEAR_FEATURE TEST_MODE */
1275 goto stall;
1276 }
1277 } else if (crq->bRequestType == USB_RECIP_ENDPOINT) {
1278 struct usba_ep *target;
1279
1280 if (crq->wLength != __constant_cpu_to_le16(0)
1281 || !feature_is_ep_halt(crq))
1282 goto stall;
1283 target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1284 if (!target)
1285 goto stall;
1286
1287 usba_ep_writel(target, CLR_STA, USBA_FORCE_STALL);
1288 if (target->index != 0)
1289 usba_ep_writel(target, CLR_STA,
1290 USBA_TOGGLE_CLR);
1291 } else {
1292 goto delegate;
1293 }
1294
1295 send_status(udc, ep);
1296 break;
1297 }
1298
1299 case USB_REQ_SET_FEATURE: {
1300 if (crq->bRequestType == USB_RECIP_DEVICE) {
1301 if (feature_is_dev_test_mode(crq)) {
1302 send_status(udc, ep);
1303 ep->state = STATUS_STAGE_TEST;
1304 udc->test_mode = le16_to_cpu(crq->wIndex);
1305 return 0;
1306 } else if (feature_is_dev_remote_wakeup(crq)) {
1307 /* TODO: Handle REMOTE_WAKEUP */
1308 } else {
1309 goto stall;
1310 }
1311 } else if (crq->bRequestType == USB_RECIP_ENDPOINT) {
1312 struct usba_ep *target;
1313
1314 if (crq->wLength != __constant_cpu_to_le16(0)
1315 || !feature_is_ep_halt(crq))
1316 goto stall;
1317
1318 target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1319 if (!target)
1320 goto stall;
1321
1322 usba_ep_writel(target, SET_STA, USBA_FORCE_STALL);
1323 } else
1324 goto delegate;
1325
1326 send_status(udc, ep);
1327 break;
1328 }
1329
1330 case USB_REQ_SET_ADDRESS:
1331 if (crq->bRequestType != (USB_DIR_OUT | USB_RECIP_DEVICE))
1332 goto delegate;
1333
1334 set_address(udc, le16_to_cpu(crq->wValue));
1335 send_status(udc, ep);
1336 ep->state = STATUS_STAGE_ADDR;
1337 break;
1338
1339 default:
1340delegate:
1341 spin_unlock(&udc->lock);
1342 retval = udc->driver->setup(&udc->gadget, crq);
1343 spin_lock(&udc->lock);
1344 }
1345
1346 return retval;
1347
1348stall:
1349 printk(KERN_ERR
1350 "udc: %s: Invalid setup request: %02x.%02x v%04x i%04x l%d, "
1351 "halting endpoint...\n",
1352 ep->ep.name, crq->bRequestType, crq->bRequest,
1353 le16_to_cpu(crq->wValue), le16_to_cpu(crq->wIndex),
1354 le16_to_cpu(crq->wLength));
1355 set_protocol_stall(udc, ep);
1356 return -1;
1357}
1358
1359static void usba_control_irq(struct usba_udc *udc, struct usba_ep *ep)
1360{
1361 struct usba_request *req;
1362 u32 epstatus;
1363 u32 epctrl;
1364
1365restart:
1366 epstatus = usba_ep_readl(ep, STA);
1367 epctrl = usba_ep_readl(ep, CTL);
1368
1369 DBG(DBG_INT, "%s [%d]: s/%08x c/%08x\n",
1370 ep->ep.name, ep->state, epstatus, epctrl);
1371
1372 req = NULL;
1373 if (!list_empty(&ep->queue))
1374 req = list_entry(ep->queue.next,
1375 struct usba_request, queue);
1376
1377 if ((epctrl & USBA_TX_PK_RDY) && !(epstatus & USBA_TX_PK_RDY)) {
1378 if (req->submitted)
1379 next_fifo_transaction(ep, req);
1380 else
1381 submit_request(ep, req);
1382
1383 if (req->last_transaction) {
1384 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
1385 usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
1386 }
1387 goto restart;
1388 }
1389 if ((epstatus & epctrl) & USBA_TX_COMPLETE) {
1390 usba_ep_writel(ep, CLR_STA, USBA_TX_COMPLETE);
1391
1392 switch (ep->state) {
1393 case DATA_STAGE_IN:
1394 usba_ep_writel(ep, CTL_ENB, USBA_RX_BK_RDY);
1395 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1396 ep->state = STATUS_STAGE_OUT;
1397 break;
1398 case STATUS_STAGE_ADDR:
1399 /* Activate our new address */
1400 usba_writel(udc, CTRL, (usba_readl(udc, CTRL)
1401 | USBA_FADDR_EN));
1402 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1403 ep->state = WAIT_FOR_SETUP;
1404 break;
1405 case STATUS_STAGE_IN:
1406 if (req) {
1407 list_del_init(&req->queue);
1408 request_complete(ep, req, 0);
1409 submit_next_request(ep);
1410 }
1411 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1412 ep->state = WAIT_FOR_SETUP;
1413 break;
1414 case STATUS_STAGE_TEST:
1415 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1416 ep->state = WAIT_FOR_SETUP;
1417 if (do_test_mode(udc))
1418 set_protocol_stall(udc, ep);
1419 break;
1420 default:
1421 printk(KERN_ERR
1422 "udc: %s: TXCOMP: Invalid endpoint state %d, "
1423 "halting endpoint...\n",
1424 ep->ep.name, ep->state);
1425 set_protocol_stall(udc, ep);
1426 break;
1427 }
1428
1429 goto restart;
1430 }
1431 if ((epstatus & epctrl) & USBA_RX_BK_RDY) {
1432 switch (ep->state) {
1433 case STATUS_STAGE_OUT:
1434 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1435 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1436
1437 if (req) {
1438 list_del_init(&req->queue);
1439 request_complete(ep, req, 0);
1440 }
1441 ep->state = WAIT_FOR_SETUP;
1442 break;
1443
1444 case DATA_STAGE_OUT:
1445 receive_data(ep);
1446 break;
1447
1448 default:
1449 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1450 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1451 printk(KERN_ERR
1452 "udc: %s: RXRDY: Invalid endpoint state %d, "
1453 "halting endpoint...\n",
1454 ep->ep.name, ep->state);
1455 set_protocol_stall(udc, ep);
1456 break;
1457 }
1458
1459 goto restart;
1460 }
1461 if (epstatus & USBA_RX_SETUP) {
1462 union {
1463 struct usb_ctrlrequest crq;
1464 unsigned long data[2];
1465 } crq;
1466 unsigned int pkt_len;
1467 int ret;
1468
1469 if (ep->state != WAIT_FOR_SETUP) {
1470 /*
1471 * Didn't expect a SETUP packet at this
1472 * point. Clean up any pending requests (which
1473 * may be successful).
1474 */
1475 int status = -EPROTO;
1476
1477 /*
1478 * RXRDY and TXCOMP are dropped when SETUP
1479 * packets arrive. Just pretend we received
1480 * the status packet.
1481 */
1482 if (ep->state == STATUS_STAGE_OUT
1483 || ep->state == STATUS_STAGE_IN) {
1484 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1485 status = 0;
1486 }
1487
1488 if (req) {
1489 list_del_init(&req->queue);
1490 request_complete(ep, req, status);
1491 }
1492 }
1493
1494 pkt_len = USBA_BFEXT(BYTE_COUNT, usba_ep_readl(ep, STA));
1495 DBG(DBG_HW, "Packet length: %u\n", pkt_len);
1496 if (pkt_len != sizeof(crq)) {
1497 printk(KERN_WARNING "udc: Invalid packet length %u "
1498 "(expected %lu)\n", pkt_len, sizeof(crq));
1499 set_protocol_stall(udc, ep);
1500 return;
1501 }
1502
1503 DBG(DBG_FIFO, "Copying ctrl request from 0x%p:\n", ep->fifo);
1504 copy_from_fifo(crq.data, ep->fifo, sizeof(crq));
1505
1506 /* Free up one bank in the FIFO so that we can
1507 * generate or receive a reply right away. */
1508 usba_ep_writel(ep, CLR_STA, USBA_RX_SETUP);
1509
1510 /* printk(KERN_DEBUG "setup: %d: %02x.%02x\n",
1511 ep->state, crq.crq.bRequestType,
1512 crq.crq.bRequest); */
1513
1514 if (crq.crq.bRequestType & USB_DIR_IN) {
1515 /*
1516 * The USB 2.0 spec states that "if wLength is
1517 * zero, there is no data transfer phase."
1518 * However, testusb #14 seems to actually
1519 * expect a data phase even if wLength = 0...
1520 */
1521 ep->state = DATA_STAGE_IN;
1522 } else {
1523 if (crq.crq.wLength != __constant_cpu_to_le16(0))
1524 ep->state = DATA_STAGE_OUT;
1525 else
1526 ep->state = STATUS_STAGE_IN;
1527 }
1528
1529 ret = -1;
1530 if (ep->index == 0)
1531 ret = handle_ep0_setup(udc, ep, &crq.crq);
1532 else {
1533 spin_unlock(&udc->lock);
1534 ret = udc->driver->setup(&udc->gadget, &crq.crq);
1535 spin_lock(&udc->lock);
1536 }
1537
1538 DBG(DBG_BUS, "req %02x.%02x, length %d, state %d, ret %d\n",
1539 crq.crq.bRequestType, crq.crq.bRequest,
1540 le16_to_cpu(crq.crq.wLength), ep->state, ret);
1541
1542 if (ret < 0) {
1543 /* Let the host know that we failed */
1544 set_protocol_stall(udc, ep);
1545 }
1546 }
1547}
1548
1549static void usba_ep_irq(struct usba_udc *udc, struct usba_ep *ep)
1550{
1551 struct usba_request *req;
1552 u32 epstatus;
1553 u32 epctrl;
1554
1555 epstatus = usba_ep_readl(ep, STA);
1556 epctrl = usba_ep_readl(ep, CTL);
1557
1558 DBG(DBG_INT, "%s: interrupt, status: 0x%08x\n", ep->ep.name, epstatus);
1559
1560 while ((epctrl & USBA_TX_PK_RDY) && !(epstatus & USBA_TX_PK_RDY)) {
1561 DBG(DBG_BUS, "%s: TX PK ready\n", ep->ep.name);
1562
1563 if (list_empty(&ep->queue)) {
1564 dev_warn(&udc->pdev->dev, "ep_irq: queue empty\n");
1565 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
1566 return;
1567 }
1568
1569 req = list_entry(ep->queue.next, struct usba_request, queue);
1570
1571 if (req->using_dma) {
1572 /* Send a zero-length packet */
1573 usba_ep_writel(ep, SET_STA,
1574 USBA_TX_PK_RDY);
1575 usba_ep_writel(ep, CTL_DIS,
1576 USBA_TX_PK_RDY);
1577 list_del_init(&req->queue);
1578 submit_next_request(ep);
1579 request_complete(ep, req, 0);
1580 } else {
1581 if (req->submitted)
1582 next_fifo_transaction(ep, req);
1583 else
1584 submit_request(ep, req);
1585
1586 if (req->last_transaction) {
1587 list_del_init(&req->queue);
1588 submit_next_request(ep);
1589 request_complete(ep, req, 0);
1590 }
1591 }
1592
1593 epstatus = usba_ep_readl(ep, STA);
1594 epctrl = usba_ep_readl(ep, CTL);
1595 }
1596 if ((epstatus & epctrl) & USBA_RX_BK_RDY) {
1597 DBG(DBG_BUS, "%s: RX data ready\n", ep->ep.name);
1598 receive_data(ep);
1599 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1600 }
1601}
1602
1603static void usba_dma_irq(struct usba_udc *udc, struct usba_ep *ep)
1604{
1605 struct usba_request *req;
1606 u32 status, control, pending;
1607
1608 status = usba_dma_readl(ep, STATUS);
1609 control = usba_dma_readl(ep, CONTROL);
1610#ifdef CONFIG_USB_GADGET_DEBUG_FS
1611 ep->last_dma_status = status;
1612#endif
1613 pending = status & control;
1614 DBG(DBG_INT | DBG_DMA, "dma irq, s/%#08x, c/%#08x\n", status, control);
1615
1616 if (status & USBA_DMA_CH_EN) {
1617 dev_err(&udc->pdev->dev,
1618 "DMA_CH_EN is set after transfer is finished!\n");
1619 dev_err(&udc->pdev->dev,
1620 "status=%#08x, pending=%#08x, control=%#08x\n",
1621 status, pending, control);
1622
1623 /*
1624 * try to pretend nothing happened. We might have to
1625 * do something here...
1626 */
1627 }
1628
1629 if (list_empty(&ep->queue))
1630 /* Might happen if a reset comes along at the right moment */
1631 return;
1632
1633 if (pending & (USBA_DMA_END_TR_ST | USBA_DMA_END_BUF_ST)) {
1634 req = list_entry(ep->queue.next, struct usba_request, queue);
1635 usba_update_req(ep, req, status);
1636
1637 list_del_init(&req->queue);
1638 submit_next_request(ep);
1639 request_complete(ep, req, 0);
1640 }
1641}
1642
1643static irqreturn_t usba_udc_irq(int irq, void *devid)
1644{
1645 struct usba_udc *udc = devid;
1646 u32 status;
1647 u32 dma_status;
1648 u32 ep_status;
1649
1650 spin_lock(&udc->lock);
1651
1652 status = usba_readl(udc, INT_STA);
1653 DBG(DBG_INT, "irq, status=%#08x\n", status);
1654
1655 if (status & USBA_DET_SUSPEND) {
1656 usba_writel(udc, INT_CLR, USBA_DET_SUSPEND);
1657 DBG(DBG_BUS, "Suspend detected\n");
1658 if (udc->gadget.speed != USB_SPEED_UNKNOWN
1659 && udc->driver && udc->driver->suspend) {
1660 spin_unlock(&udc->lock);
1661 udc->driver->suspend(&udc->gadget);
1662 spin_lock(&udc->lock);
1663 }
1664 }
1665
1666 if (status & USBA_WAKE_UP) {
1667 usba_writel(udc, INT_CLR, USBA_WAKE_UP);
1668 DBG(DBG_BUS, "Wake Up CPU detected\n");
1669 }
1670
1671 if (status & USBA_END_OF_RESUME) {
1672 usba_writel(udc, INT_CLR, USBA_END_OF_RESUME);
1673 DBG(DBG_BUS, "Resume detected\n");
1674 if (udc->gadget.speed != USB_SPEED_UNKNOWN
1675 && udc->driver && udc->driver->resume) {
1676 spin_unlock(&udc->lock);
1677 udc->driver->resume(&udc->gadget);
1678 spin_lock(&udc->lock);
1679 }
1680 }
1681
1682 dma_status = USBA_BFEXT(DMA_INT, status);
1683 if (dma_status) {
1684 int i;
1685
1686 for (i = 1; i < USBA_NR_ENDPOINTS; i++)
1687 if (dma_status & (1 << i))
1688 usba_dma_irq(udc, &usba_ep[i]);
1689 }
1690
1691 ep_status = USBA_BFEXT(EPT_INT, status);
1692 if (ep_status) {
1693 int i;
1694
1695 for (i = 0; i < USBA_NR_ENDPOINTS; i++)
1696 if (ep_status & (1 << i)) {
1697 if (ep_is_control(&usba_ep[i]))
1698 usba_control_irq(udc, &usba_ep[i]);
1699 else
1700 usba_ep_irq(udc, &usba_ep[i]);
1701 }
1702 }
1703
1704 if (status & USBA_END_OF_RESET) {
1705 struct usba_ep *ep0;
1706
1707 usba_writel(udc, INT_CLR, USBA_END_OF_RESET);
1708 reset_all_endpoints(udc);
1709
1710 if (status & USBA_HIGH_SPEED) {
1711 DBG(DBG_BUS, "High-speed bus reset detected\n");
1712 udc->gadget.speed = USB_SPEED_HIGH;
1713 } else {
1714 DBG(DBG_BUS, "Full-speed bus reset detected\n");
1715 udc->gadget.speed = USB_SPEED_FULL;
1716 }
1717
1718 ep0 = &usba_ep[0];
1719 ep0->desc = &usba_ep0_desc;
1720 ep0->state = WAIT_FOR_SETUP;
1721 usba_ep_writel(ep0, CFG,
1722 (USBA_BF(EPT_SIZE, EP0_EPT_SIZE)
1723 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_CONTROL)
1724 | USBA_BF(BK_NUMBER, USBA_BK_NUMBER_ONE)));
1725 usba_ep_writel(ep0, CTL_ENB,
1726 USBA_EPT_ENABLE | USBA_RX_SETUP);
1727 usba_writel(udc, INT_ENB,
1728 (usba_readl(udc, INT_ENB)
1729 | USBA_BF(EPT_INT, 1)
1730 | USBA_DET_SUSPEND
1731 | USBA_END_OF_RESUME));
1732
1733 if (!(usba_ep_readl(ep0, CFG) & USBA_EPT_MAPPED))
1734 dev_warn(&udc->pdev->dev,
1735 "WARNING: EP0 configuration is invalid!\n");
1736 }
1737
1738 spin_unlock(&udc->lock);
1739
1740 return IRQ_HANDLED;
1741}
1742
1743static irqreturn_t usba_vbus_irq(int irq, void *devid)
1744{
1745 struct usba_udc *udc = devid;
1746 int vbus;
1747
1748 /* debounce */
1749 udelay(10);
1750
1751 spin_lock(&udc->lock);
1752
1753 /* May happen if Vbus pin toggles during probe() */
1754 if (!udc->driver)
1755 goto out;
1756
1757 vbus = gpio_get_value(udc->vbus_pin);
1758 if (vbus != udc->vbus_prev) {
1759 if (vbus) {
1760 usba_writel(udc, CTRL, USBA_EN_USBA);
1761 usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
1762 } else {
1763 udc->gadget.speed = USB_SPEED_UNKNOWN;
1764 reset_all_endpoints(udc);
1765 usba_writel(udc, CTRL, 0);
1766 spin_unlock(&udc->lock);
1767 udc->driver->disconnect(&udc->gadget);
1768 spin_lock(&udc->lock);
1769 }
1770 udc->vbus_prev = vbus;
1771 }
1772
1773out:
1774 spin_unlock(&udc->lock);
1775
1776 return IRQ_HANDLED;
1777}
1778
1779int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1780{
1781 struct usba_udc *udc = &the_udc;
1782 unsigned long flags;
1783 int ret;
1784
1785 if (!udc->pdev)
1786 return -ENODEV;
1787
1788 spin_lock_irqsave(&udc->lock, flags);
1789 if (udc->driver) {
1790 spin_unlock_irqrestore(&udc->lock, flags);
1791 return -EBUSY;
1792 }
1793
1794 udc->driver = driver;
1795 udc->gadget.dev.driver = &driver->driver;
1796 spin_unlock_irqrestore(&udc->lock, flags);
1797
1798 clk_enable(udc->pclk);
1799 clk_enable(udc->hclk);
1800
1801 ret = driver->bind(&udc->gadget);
1802 if (ret) {
1803 DBG(DBG_ERR, "Could not bind to driver %s: error %d\n",
1804 driver->driver.name, ret);
1805 goto err_driver_bind;
1806 }
1807
1808 DBG(DBG_GADGET, "registered driver `%s'\n", driver->driver.name);
1809
1810 udc->vbus_prev = 0;
1811 if (udc->vbus_pin != -1)
1812 enable_irq(gpio_to_irq(udc->vbus_pin));
1813
1814 /* If Vbus is present, enable the controller and wait for reset */
1815 spin_lock_irqsave(&udc->lock, flags);
1816 if (vbus_is_present(udc) && udc->vbus_prev == 0) {
1817 usba_writel(udc, CTRL, USBA_EN_USBA);
1818 usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
1819 }
1820 spin_unlock_irqrestore(&udc->lock, flags);
1821
1822 return 0;
1823
1824err_driver_bind:
1825 udc->driver = NULL;
1826 udc->gadget.dev.driver = NULL;
1827 return ret;
1828}
1829EXPORT_SYMBOL(usb_gadget_register_driver);
1830
1831int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1832{
1833 struct usba_udc *udc = &the_udc;
1834 unsigned long flags;
1835
1836 if (!udc->pdev)
1837 return -ENODEV;
1838 if (driver != udc->driver)
1839 return -EINVAL;
1840
1841 if (udc->vbus_pin != -1)
1842 disable_irq(gpio_to_irq(udc->vbus_pin));
1843
1844 spin_lock_irqsave(&udc->lock, flags);
1845 udc->gadget.speed = USB_SPEED_UNKNOWN;
1846 reset_all_endpoints(udc);
1847 spin_unlock_irqrestore(&udc->lock, flags);
1848
1849 /* This will also disable the DP pullup */
1850 usba_writel(udc, CTRL, 0);
1851
1852 driver->unbind(&udc->gadget);
1853 udc->gadget.dev.driver = NULL;
1854 udc->driver = NULL;
1855
1856 clk_disable(udc->hclk);
1857 clk_disable(udc->pclk);
1858
1859 DBG(DBG_GADGET, "unregistered driver `%s'\n", driver->driver.name);
1860
1861 return 0;
1862}
1863EXPORT_SYMBOL(usb_gadget_unregister_driver);
1864
1865static int __init usba_udc_probe(struct platform_device *pdev)
1866{
1867 struct usba_platform_data *pdata = pdev->dev.platform_data;
1868 struct resource *regs, *fifo;
1869 struct clk *pclk, *hclk;
1870 struct usba_udc *udc = &the_udc;
1871 int irq, ret, i;
1872
1873 regs = platform_get_resource(pdev, IORESOURCE_MEM, CTRL_IOMEM_ID);
1874 fifo = platform_get_resource(pdev, IORESOURCE_MEM, FIFO_IOMEM_ID);
1875 if (!regs || !fifo)
1876 return -ENXIO;
1877
1878 irq = platform_get_irq(pdev, 0);
1879 if (irq < 0)
1880 return irq;
1881
1882 pclk = clk_get(&pdev->dev, "pclk");
1883 if (IS_ERR(pclk))
1884 return PTR_ERR(pclk);
1885 hclk = clk_get(&pdev->dev, "hclk");
1886 if (IS_ERR(hclk)) {
1887 ret = PTR_ERR(hclk);
1888 goto err_get_hclk;
1889 }
1890
1891 udc->pdev = pdev;
1892 udc->pclk = pclk;
1893 udc->hclk = hclk;
1894 udc->vbus_pin = -1;
1895
1896 ret = -ENOMEM;
1897 udc->regs = ioremap(regs->start, regs->end - regs->start + 1);
1898 if (!udc->regs) {
1899 dev_err(&pdev->dev, "Unable to map I/O memory, aborting.\n");
1900 goto err_map_regs;
1901 }
1902 dev_info(&pdev->dev, "MMIO registers at 0x%08lx mapped at %p\n",
1903 (unsigned long)regs->start, udc->regs);
1904 udc->fifo = ioremap(fifo->start, fifo->end - fifo->start + 1);
1905 if (!udc->fifo) {
1906 dev_err(&pdev->dev, "Unable to map FIFO, aborting.\n");
1907 goto err_map_fifo;
1908 }
1909 dev_info(&pdev->dev, "FIFO at 0x%08lx mapped at %p\n",
1910 (unsigned long)fifo->start, udc->fifo);
1911
1912 device_initialize(&udc->gadget.dev);
1913 udc->gadget.dev.parent = &pdev->dev;
1914 udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
1915
1916 platform_set_drvdata(pdev, udc);
1917
1918 /* Make sure we start from a clean slate */
1919 clk_enable(pclk);
1920 usba_writel(udc, CTRL, 0);
1921 clk_disable(pclk);
1922
1923 INIT_LIST_HEAD(&usba_ep[0].ep.ep_list);
1924 usba_ep[0].ep_regs = udc->regs + USBA_EPT_BASE(0);
1925 usba_ep[0].dma_regs = udc->regs + USBA_DMA_BASE(0);
1926 usba_ep[0].fifo = udc->fifo + USBA_FIFO_BASE(0);
1927 for (i = 1; i < ARRAY_SIZE(usba_ep); i++) {
1928 struct usba_ep *ep = &usba_ep[i];
1929
1930 ep->ep_regs = udc->regs + USBA_EPT_BASE(i);
1931 ep->dma_regs = udc->regs + USBA_DMA_BASE(i);
1932 ep->fifo = udc->fifo + USBA_FIFO_BASE(i);
1933
1934 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
1935 }
1936
1937 ret = request_irq(irq, usba_udc_irq, 0, "atmel_usba_udc", udc);
1938 if (ret) {
1939 dev_err(&pdev->dev, "Cannot request irq %d (error %d)\n",
1940 irq, ret);
1941 goto err_request_irq;
1942 }
1943 udc->irq = irq;
1944
1945 ret = device_add(&udc->gadget.dev);
1946 if (ret) {
1947 dev_dbg(&pdev->dev, "Could not add gadget: %d\n", ret);
1948 goto err_device_add;
1949 }
1950
1951 if (pdata && pdata->vbus_pin != GPIO_PIN_NONE) {
1952 if (!gpio_request(pdata->vbus_pin, "atmel_usba_udc")) {
1953 udc->vbus_pin = pdata->vbus_pin;
1954
1955 ret = request_irq(gpio_to_irq(udc->vbus_pin),
1956 usba_vbus_irq, 0,
1957 "atmel_usba_udc", udc);
1958 if (ret) {
1959 gpio_free(udc->vbus_pin);
1960 udc->vbus_pin = -1;
1961 dev_warn(&udc->pdev->dev,
1962 "failed to request vbus irq; "
1963 "assuming always on\n");
1964 } else {
1965 disable_irq(gpio_to_irq(udc->vbus_pin));
1966 }
1967 }
1968 }
1969
1970 usba_init_debugfs(udc);
1971 for (i = 1; i < ARRAY_SIZE(usba_ep); i++)
1972 usba_ep_init_debugfs(udc, &usba_ep[i]);
1973
1974 return 0;
1975
1976err_device_add:
1977 free_irq(irq, udc);
1978err_request_irq:
1979 iounmap(udc->fifo);
1980err_map_fifo:
1981 iounmap(udc->regs);
1982err_map_regs:
1983 clk_put(hclk);
1984err_get_hclk:
1985 clk_put(pclk);
1986
1987 platform_set_drvdata(pdev, NULL);
1988
1989 return ret;
1990}
1991
1992static int __exit usba_udc_remove(struct platform_device *pdev)
1993{
1994 struct usba_udc *udc;
1995 int i;
1996
1997 udc = platform_get_drvdata(pdev);
1998
1999 for (i = 1; i < ARRAY_SIZE(usba_ep); i++)
2000 usba_ep_cleanup_debugfs(&usba_ep[i]);
2001 usba_cleanup_debugfs(udc);
2002
2003 if (udc->vbus_pin != -1)
2004 gpio_free(udc->vbus_pin);
2005
2006 free_irq(udc->irq, udc);
2007 iounmap(udc->fifo);
2008 iounmap(udc->regs);
2009 clk_put(udc->hclk);
2010 clk_put(udc->pclk);
2011
2012 device_unregister(&udc->gadget.dev);
2013
2014 return 0;
2015}
2016
2017static struct platform_driver udc_driver = {
2018 .remove = __exit_p(usba_udc_remove),
2019 .driver = {
2020 .name = "atmel_usba_udc",
2021 },
2022};
2023
2024static int __init udc_init(void)
2025{
2026 return platform_driver_probe(&udc_driver, usba_udc_probe);
2027}
2028module_init(udc_init);
2029
2030static void __exit udc_exit(void)
2031{
2032 platform_driver_unregister(&udc_driver);
2033}
2034module_exit(udc_exit);
2035
2036MODULE_DESCRIPTION("Atmel USBA UDC driver");
2037MODULE_AUTHOR("Haavard Skinnemoen <hskinnemoen@atmel.com>");
2038MODULE_LICENSE("GPL");
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