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mm: make register_page_bootmem_info_section() static
[linux-2.6/mini2440.git] / drivers / usb / gadget / atmel_usba_udc.c
blob07e5a0b5dcda49ea70aef4a5ee8f6b814fbf2a79
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/usb/atmel_usba_udc.h>
22 #include <linux/delay.h>
23
24 #include <asm/gpio.h>
25 #include <asm/arch/board.h>
26
27 #include "atmel_usba_udc.h"
28
29
30 static struct usba_udc the_udc;
31 static struct usba_ep *usba_ep;
32
33 #ifdef CONFIG_USB_GADGET_DEBUG_FS
34 #include <linux/debugfs.h>
35 #include <linux/uaccess.h>
36
37 static int queue_dbg_open(struct inode *inode, struct file *file)
38 {
39 struct usba_ep *ep = inode->i_private;
40 struct usba_request *req, *req_copy;
41 struct list_head *queue_data;
42
43 queue_data = kmalloc(sizeof(*queue_data), GFP_KERNEL);
44 if (!queue_data)
45 return -ENOMEM;
46 INIT_LIST_HEAD(queue_data);
47
48 spin_lock_irq(&ep->udc->lock);
49 list_for_each_entry(req, &ep->queue, queue) {
50 req_copy = kmalloc(sizeof(*req_copy), GFP_ATOMIC);
51 if (!req_copy)
52 goto fail;
53 memcpy(req_copy, req, sizeof(*req_copy));
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
61 fail:
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 * bbbbbbbb llllllll IZS sssss nnnn FDL\n\0
73 *
74 * b: buffer address
75 * l: buffer length
76 * I/i: interrupt/no interrupt
77 * Z/z: zero/no zero
78 * S/s: short ok/short not ok
79 * s: status
80 * n: nr_packets
81 * F/f: submitted/not submitted to FIFO
82 * D/d: using/not using DMA
83 * L/l: last transaction/not last transaction
84 */
85 static 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
128 static 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
141 static 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
162 out:
163 mutex_unlock(&inode->i_mutex);
164
165 return ret;
166 }
167
168 static 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
183 static int regs_dbg_release(struct inode *inode, struct file *file)
184 {
185 kfree(file->private_data);
186 return 0;
187 }
188
189 const 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
197 const 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
205 static 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
237 err_state:
238 if (ep->can_dma)
239 debugfs_remove(ep->debugfs_dma_status);
240 err_dma_status:
241 debugfs_remove(ep->debugfs_queue);
242 err_queue:
243 debugfs_remove(ep_root);
244 err_root:
245 dev_err(&ep->udc->pdev->dev,
246 "failed to create debugfs directory for %s\n", ep->ep.name);
247 }
248
249 static 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
259 static 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, &regs_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 = regs_resource->end - regs_resource->start + 1;
276 udc->debugfs_regs = regs;
277
278 usba_ep_init_debugfs(udc, to_usba_ep(udc->gadget.ep0));
279
280 return;
281
282 err_regs:
283 debugfs_remove(root);
284 err_root:
285 udc->debugfs_root = NULL;
286 dev_err(&udc->pdev->dev, "debugfs is not available\n");
287 }
288
289 static 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
298 static inline void usba_ep_init_debugfs(struct usba_udc *udc,
299 struct usba_ep *ep)
300 {
301
302 }
303
304 static inline void usba_ep_cleanup_debugfs(struct usba_ep *ep)
305 {
306
307 }
308
309 static inline void usba_init_debugfs(struct usba_udc *udc)
310 {
311
312 }
313
314 static inline void usba_cleanup_debugfs(struct usba_udc *udc)
315 {
316
317 }
318 #endif
319
320 static int vbus_is_present(struct usba_udc *udc)
321 {
322 if (udc->vbus_pin != -1)
323 return gpio_get_value(udc->vbus_pin);
324
325 /* No Vbus detection: Assume always present */
326 return 1;
327 }
328
329 #if defined(CONFIG_AVR32)
330
331 static void toggle_bias(int is_on)
332 {
333 }
334
335 #elif defined(CONFIG_ARCH_AT91)
336
337 #include <asm/arch/at91_pmc.h>
338
339 static void toggle_bias(int is_on)
340 {
341 unsigned int uckr = at91_sys_read(AT91_CKGR_UCKR);
342
343 if (is_on)
344 at91_sys_write(AT91_CKGR_UCKR, uckr | AT91_PMC_BIASEN);
345 else
346 at91_sys_write(AT91_CKGR_UCKR, uckr & ~(AT91_PMC_BIASEN));
347 }
348
349 #endif /* CONFIG_ARCH_AT91 */
350
351 static 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
372 static 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
405 static 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
419 static 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
426 static 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
482 static void
483 request_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
509 static void
510 request_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
520 static int
521 usba_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 = le16_to_cpu(desc->wMaxPacketSize) & 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 /* LSB is bit 1, not 0 */
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 ((desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) {
554 ep->is_in = 1;
555 ept_cfg |= USBA_EPT_DIR_IN;
556 }
557
558 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
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 * Bits 11:12 specify number of _additional_
572 * transactions per microframe.
573 */
574 nr_trans = ((le16_to_cpu(desc->wMaxPacketSize) >> 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 * Do triple-buffering on high-bandwidth iso endpoints.
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
639 static 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 /* REVISIT because this driver disables endpoints in
653 * reset_all_endpoints() before calling disconnect(),
654 * most gadget drivers would trigger this non-error ...
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
681 static struct usb_request *
682 usba_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
698 static void
699 usba_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
708 static 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 /* Lengths from 0 to 65536 (inclusive) are supported */
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 * Add this request to the queue and submit for DMA if
749 * possible. Check if we're still alive first -- we may have
750 * received a reset since last time we checked.
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
766 static int
767 usba_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 /* May have received a reset since last time we checked */
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_in || (ep_is_control(ep)
798 && (ep->state == DATA_STAGE_IN
799 || ep->state == STATUS_STAGE_IN)))
800 usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
801 else
802 usba_ep_writel(ep, CTL_ENB, USBA_RX_BK_RDY);
803 ret = 0;
804 }
805 spin_unlock_irqrestore(&udc->lock, flags);
806
807 return ret;
808 }
809
810 static void
811 usba_update_req(struct usba_ep *ep, struct usba_request *req, u32 status)
812 {
813 req->req.actual = req->req.length - USBA_BFEXT(DMA_BUF_LEN, status);
814 }
815
816 static int stop_dma(struct usba_ep *ep, u32 *pstatus)
817 {
818 unsigned int timeout;
819 u32 status;
820
821 /*
822 * Stop the DMA controller. When writing both CH_EN
823 * and LINK to 0, the other bits are not affected.
824 */
825 usba_dma_writel(ep, CONTROL, 0);
826
827 /* Wait for the FIFO to empty */
828 for (timeout = 40; timeout; --timeout) {
829 status = usba_dma_readl(ep, STATUS);
830 if (!(status & USBA_DMA_CH_EN))
831 break;
832 udelay(1);
833 }
834
835 if (pstatus)
836 *pstatus = status;
837
838 if (timeout == 0) {
839 dev_err(&ep->udc->pdev->dev,
840 "%s: timed out waiting for DMA FIFO to empty\n",
841 ep->ep.name);
842 return -ETIMEDOUT;
843 }
844
845 return 0;
846 }
847
848 static int usba_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
849 {
850 struct usba_ep *ep = to_usba_ep(_ep);
851 struct usba_udc *udc = ep->udc;
852 struct usba_request *req = to_usba_req(_req);
853 unsigned long flags;
854 u32 status;
855
856 DBG(DBG_GADGET | DBG_QUEUE, "ep_dequeue: %s, req %p\n",
857 ep->ep.name, req);
858
859 spin_lock_irqsave(&udc->lock, flags);
860
861 if (req->using_dma) {
862 /*
863 * If this request is currently being transferred,
864 * stop the DMA controller and reset the FIFO.
865 */
866 if (ep->queue.next == &req->queue) {
867 status = usba_dma_readl(ep, STATUS);
868 if (status & USBA_DMA_CH_EN)
869 stop_dma(ep, &status);
870
871 #ifdef CONFIG_USB_GADGET_DEBUG_FS
872 ep->last_dma_status = status;
873 #endif
874
875 usba_writel(udc, EPT_RST, 1 << ep->index);
876
877 usba_update_req(ep, req, status);
878 }
879 }
880
881 /*
882 * Errors should stop the queue from advancing until the
883 * completion function returns.
884 */
885 list_del_init(&req->queue);
886
887 request_complete(ep, req, -ECONNRESET);
888
889 /* Process the next request if any */
890 submit_next_request(ep);
891 spin_unlock_irqrestore(&udc->lock, flags);
892
893 return 0;
894 }
895
896 static int usba_ep_set_halt(struct usb_ep *_ep, int value)
897 {
898 struct usba_ep *ep = to_usba_ep(_ep);
899 struct usba_udc *udc = ep->udc;
900 unsigned long flags;
901 int ret = 0;
902
903 DBG(DBG_GADGET, "endpoint %s: %s HALT\n", ep->ep.name,
904 value ? "set" : "clear");
905
906 if (!ep->desc) {
907 DBG(DBG_ERR, "Attempted to halt uninitialized ep %s\n",
908 ep->ep.name);
909 return -ENODEV;
910 }
911 if (ep->is_isoc) {
912 DBG(DBG_ERR, "Attempted to halt isochronous ep %s\n",
913 ep->ep.name);
914 return -ENOTTY;
915 }
916
917 spin_lock_irqsave(&udc->lock, flags);
918
919 /*
920 * We can't halt IN endpoints while there are still data to be
921 * transferred
922 */
923 if (!list_empty(&ep->queue)
924 || ((value && ep->is_in && (usba_ep_readl(ep, STA)
925 & USBA_BF(BUSY_BANKS, -1L))))) {
926 ret = -EAGAIN;
927 } else {
928 if (value)
929 usba_ep_writel(ep, SET_STA, USBA_FORCE_STALL);
930 else
931 usba_ep_writel(ep, CLR_STA,
932 USBA_FORCE_STALL | USBA_TOGGLE_CLR);
933 usba_ep_readl(ep, STA);
934 }
935
936 spin_unlock_irqrestore(&udc->lock, flags);
937
938 return ret;
939 }
940
941 static int usba_ep_fifo_status(struct usb_ep *_ep)
942 {
943 struct usba_ep *ep = to_usba_ep(_ep);
944
945 return USBA_BFEXT(BYTE_COUNT, usba_ep_readl(ep, STA));
946 }
947
948 static void usba_ep_fifo_flush(struct usb_ep *_ep)
949 {
950 struct usba_ep *ep = to_usba_ep(_ep);
951 struct usba_udc *udc = ep->udc;
952
953 usba_writel(udc, EPT_RST, 1 << ep->index);
954 }
955
956 static const struct usb_ep_ops usba_ep_ops = {
957 .enable = usba_ep_enable,
958 .disable = usba_ep_disable,
959 .alloc_request = usba_ep_alloc_request,
960 .free_request = usba_ep_free_request,
961 .queue = usba_ep_queue,
962 .dequeue = usba_ep_dequeue,
963 .set_halt = usba_ep_set_halt,
964 .fifo_status = usba_ep_fifo_status,
965 .fifo_flush = usba_ep_fifo_flush,
966 };
967
968 static int usba_udc_get_frame(struct usb_gadget *gadget)
969 {
970 struct usba_udc *udc = to_usba_udc(gadget);
971
972 return USBA_BFEXT(FRAME_NUMBER, usba_readl(udc, FNUM));
973 }
974
975 static int usba_udc_wakeup(struct usb_gadget *gadget)
976 {
977 struct usba_udc *udc = to_usba_udc(gadget);
978 unsigned long flags;
979 u32 ctrl;
980 int ret = -EINVAL;
981
982 spin_lock_irqsave(&udc->lock, flags);
983 if (udc->devstatus & (1 << USB_DEVICE_REMOTE_WAKEUP)) {
984 ctrl = usba_readl(udc, CTRL);
985 usba_writel(udc, CTRL, ctrl | USBA_REMOTE_WAKE_UP);
986 ret = 0;
987 }
988 spin_unlock_irqrestore(&udc->lock, flags);
989
990 return ret;
991 }
992
993 static int
994 usba_udc_set_selfpowered(struct usb_gadget *gadget, int is_selfpowered)
995 {
996 struct usba_udc *udc = to_usba_udc(gadget);
997 unsigned long flags;
998
999 spin_lock_irqsave(&udc->lock, flags);
1000 if (is_selfpowered)
1001 udc->devstatus |= 1 << USB_DEVICE_SELF_POWERED;
1002 else
1003 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1004 spin_unlock_irqrestore(&udc->lock, flags);
1005
1006 return 0;
1007 }
1008
1009 static const struct usb_gadget_ops usba_udc_ops = {
1010 .get_frame = usba_udc_get_frame,
1011 .wakeup = usba_udc_wakeup,
1012 .set_selfpowered = usba_udc_set_selfpowered,
1013 };
1014
1015 static struct usb_endpoint_descriptor usba_ep0_desc = {
1016 .bLength = USB_DT_ENDPOINT_SIZE,
1017 .bDescriptorType = USB_DT_ENDPOINT,
1018 .bEndpointAddress = 0,
1019 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
1020 .wMaxPacketSize = __constant_cpu_to_le16(64),
1021 /* FIXME: I have no idea what to put here */
1022 .bInterval = 1,
1023 };
1024
1025 static void nop_release(struct device *dev)
1026 {
1027
1028 }
1029
1030 static struct usba_udc the_udc = {
1031 .gadget = {
1032 .ops = &usba_udc_ops,
1033 .ep_list = LIST_HEAD_INIT(the_udc.gadget.ep_list),
1034 .is_dualspeed = 1,
1035 .name = "atmel_usba_udc",
1036 .dev = {
1037 .bus_id = "gadget",
1038 .release = nop_release,
1039 },
1040 },
1041 };
1042
1043 /*
1044 * Called with interrupts disabled and udc->lock held.
1045 */
1046 static void reset_all_endpoints(struct usba_udc *udc)
1047 {
1048 struct usba_ep *ep;
1049 struct usba_request *req, *tmp_req;
1050
1051 usba_writel(udc, EPT_RST, ~0UL);
1052
1053 ep = to_usba_ep(udc->gadget.ep0);
1054 list_for_each_entry_safe(req, tmp_req, &ep->queue, queue) {
1055 list_del_init(&req->queue);
1056 request_complete(ep, req, -ECONNRESET);
1057 }
1058
1059 /* NOTE: normally, the next call to the gadget driver is in
1060 * charge of disabling endpoints... usually disconnect().
1061 * The exception would be entering a high speed test mode.
1062 *
1063 * FIXME remove this code ... and retest thoroughly.
1064 */
1065 list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
1066 if (ep->desc) {
1067 spin_unlock(&udc->lock);
1068 usba_ep_disable(&ep->ep);
1069 spin_lock(&udc->lock);
1070 }
1071 }
1072 }
1073
1074 static struct usba_ep *get_ep_by_addr(struct usba_udc *udc, u16 wIndex)
1075 {
1076 struct usba_ep *ep;
1077
1078 if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0)
1079 return to_usba_ep(udc->gadget.ep0);
1080
1081 list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list) {
1082 u8 bEndpointAddress;
1083
1084 if (!ep->desc)
1085 continue;
1086 bEndpointAddress = ep->desc->bEndpointAddress;
1087 if ((wIndex ^ bEndpointAddress) & USB_DIR_IN)
1088 continue;
1089 if ((bEndpointAddress & USB_ENDPOINT_NUMBER_MASK)
1090 == (wIndex & USB_ENDPOINT_NUMBER_MASK))
1091 return ep;
1092 }
1093
1094 return NULL;
1095 }
1096
1097 /* Called with interrupts disabled and udc->lock held */
1098 static inline void set_protocol_stall(struct usba_udc *udc, struct usba_ep *ep)
1099 {
1100 usba_ep_writel(ep, SET_STA, USBA_FORCE_STALL);
1101 ep->state = WAIT_FOR_SETUP;
1102 }
1103
1104 static inline int is_stalled(struct usba_udc *udc, struct usba_ep *ep)
1105 {
1106 if (usba_ep_readl(ep, STA) & USBA_FORCE_STALL)
1107 return 1;
1108 return 0;
1109 }
1110
1111 static inline void set_address(struct usba_udc *udc, unsigned int addr)
1112 {
1113 u32 regval;
1114
1115 DBG(DBG_BUS, "setting address %u...\n", addr);
1116 regval = usba_readl(udc, CTRL);
1117 regval = USBA_BFINS(DEV_ADDR, addr, regval);
1118 usba_writel(udc, CTRL, regval);
1119 }
1120
1121 static int do_test_mode(struct usba_udc *udc)
1122 {
1123 static const char test_packet_buffer[] = {
1124 /* JKJKJKJK * 9 */
1125 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
1126 /* JJKKJJKK * 8 */
1127 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA,
1128 /* JJKKJJKK * 8 */
1129 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE,
1130 /* JJJJJJJKKKKKKK * 8 */
1131 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
1132 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
1133 /* JJJJJJJK * 8 */
1134 0x7F, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD,
1135 /* {JKKKKKKK * 10}, JK */
1136 0xFC, 0x7E, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD, 0x7E
1137 };
1138 struct usba_ep *ep;
1139 struct device *dev = &udc->pdev->dev;
1140 int test_mode;
1141
1142 test_mode = udc->test_mode;
1143
1144 /* Start from a clean slate */
1145 reset_all_endpoints(udc);
1146
1147 switch (test_mode) {
1148 case 0x0100:
1149 /* Test_J */
1150 usba_writel(udc, TST, USBA_TST_J_MODE);
1151 dev_info(dev, "Entering Test_J mode...\n");
1152 break;
1153 case 0x0200:
1154 /* Test_K */
1155 usba_writel(udc, TST, USBA_TST_K_MODE);
1156 dev_info(dev, "Entering Test_K mode...\n");
1157 break;
1158 case 0x0300:
1159 /*
1160 * Test_SE0_NAK: Force high-speed mode and set up ep0
1161 * for Bulk IN transfers
1162 */
1163 ep = &usba_ep[0];
1164 usba_writel(udc, TST,
1165 USBA_BF(SPEED_CFG, USBA_SPEED_CFG_FORCE_HIGH));
1166 usba_ep_writel(ep, CFG,
1167 USBA_BF(EPT_SIZE, USBA_EPT_SIZE_64)
1168 | USBA_EPT_DIR_IN
1169 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK)
1170 | USBA_BF(BK_NUMBER, 1));
1171 if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED)) {
1172 set_protocol_stall(udc, ep);
1173 dev_err(dev, "Test_SE0_NAK: ep0 not mapped\n");
1174 } else {
1175 usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
1176 dev_info(dev, "Entering Test_SE0_NAK mode...\n");
1177 }
1178 break;
1179 case 0x0400:
1180 /* Test_Packet */
1181 ep = &usba_ep[0];
1182 usba_ep_writel(ep, CFG,
1183 USBA_BF(EPT_SIZE, USBA_EPT_SIZE_64)
1184 | USBA_EPT_DIR_IN
1185 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK)
1186 | USBA_BF(BK_NUMBER, 1));
1187 if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED)) {
1188 set_protocol_stall(udc, ep);
1189 dev_err(dev, "Test_Packet: ep0 not mapped\n");
1190 } else {
1191 usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
1192 usba_writel(udc, TST, USBA_TST_PKT_MODE);
1193 memcpy_toio(ep->fifo, test_packet_buffer,
1194 sizeof(test_packet_buffer));
1195 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
1196 dev_info(dev, "Entering Test_Packet mode...\n");
1197 }
1198 break;
1199 default:
1200 dev_err(dev, "Invalid test mode: 0x%04x\n", test_mode);
1201 return -EINVAL;
1202 }
1203
1204 return 0;
1205 }
1206
1207 /* Avoid overly long expressions */
1208 static inline bool feature_is_dev_remote_wakeup(struct usb_ctrlrequest *crq)
1209 {
1210 if (crq->wValue == __constant_cpu_to_le16(USB_DEVICE_REMOTE_WAKEUP))
1211 return true;
1212 return false;
1213 }
1214
1215 static inline bool feature_is_dev_test_mode(struct usb_ctrlrequest *crq)
1216 {
1217 if (crq->wValue == __constant_cpu_to_le16(USB_DEVICE_TEST_MODE))
1218 return true;
1219 return false;
1220 }
1221
1222 static inline bool feature_is_ep_halt(struct usb_ctrlrequest *crq)
1223 {
1224 if (crq->wValue == __constant_cpu_to_le16(USB_ENDPOINT_HALT))
1225 return true;
1226 return false;
1227 }
1228
1229 static int handle_ep0_setup(struct usba_udc *udc, struct usba_ep *ep,
1230 struct usb_ctrlrequest *crq)
1231 {
1232 int retval = 0;
1233
1234 switch (crq->bRequest) {
1235 case USB_REQ_GET_STATUS: {
1236 u16 status;
1237
1238 if (crq->bRequestType == (USB_DIR_IN | USB_RECIP_DEVICE)) {
1239 status = cpu_to_le16(udc->devstatus);
1240 } else if (crq->bRequestType
1241 == (USB_DIR_IN | USB_RECIP_INTERFACE)) {
1242 status = __constant_cpu_to_le16(0);
1243 } else if (crq->bRequestType
1244 == (USB_DIR_IN | USB_RECIP_ENDPOINT)) {
1245 struct usba_ep *target;
1246
1247 target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1248 if (!target)
1249 goto stall;
1250
1251 status = 0;
1252 if (is_stalled(udc, target))
1253 status |= __constant_cpu_to_le16(1);
1254 } else
1255 goto delegate;
1256
1257 /* Write directly to the FIFO. No queueing is done. */
1258 if (crq->wLength != __constant_cpu_to_le16(sizeof(status)))
1259 goto stall;
1260 ep->state = DATA_STAGE_IN;
1261 __raw_writew(status, ep->fifo);
1262 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
1263 break;
1264 }
1265
1266 case USB_REQ_CLEAR_FEATURE: {
1267 if (crq->bRequestType == USB_RECIP_DEVICE) {
1268 if (feature_is_dev_remote_wakeup(crq))
1269 udc->devstatus
1270 &= ~(1 << USB_DEVICE_REMOTE_WAKEUP);
1271 else
1272 /* Can't CLEAR_FEATURE TEST_MODE */
1273 goto stall;
1274 } else if (crq->bRequestType == USB_RECIP_ENDPOINT) {
1275 struct usba_ep *target;
1276
1277 if (crq->wLength != __constant_cpu_to_le16(0)
1278 || !feature_is_ep_halt(crq))
1279 goto stall;
1280 target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1281 if (!target)
1282 goto stall;
1283
1284 usba_ep_writel(target, CLR_STA, USBA_FORCE_STALL);
1285 if (target->index != 0)
1286 usba_ep_writel(target, CLR_STA,
1287 USBA_TOGGLE_CLR);
1288 } else {
1289 goto delegate;
1290 }
1291
1292 send_status(udc, ep);
1293 break;
1294 }
1295
1296 case USB_REQ_SET_FEATURE: {
1297 if (crq->bRequestType == USB_RECIP_DEVICE) {
1298 if (feature_is_dev_test_mode(crq)) {
1299 send_status(udc, ep);
1300 ep->state = STATUS_STAGE_TEST;
1301 udc->test_mode = le16_to_cpu(crq->wIndex);
1302 return 0;
1303 } else if (feature_is_dev_remote_wakeup(crq)) {
1304 udc->devstatus |= 1 << USB_DEVICE_REMOTE_WAKEUP;
1305 } else {
1306 goto stall;
1307 }
1308 } else if (crq->bRequestType == USB_RECIP_ENDPOINT) {
1309 struct usba_ep *target;
1310
1311 if (crq->wLength != __constant_cpu_to_le16(0)
1312 || !feature_is_ep_halt(crq))
1313 goto stall;
1314
1315 target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1316 if (!target)
1317 goto stall;
1318
1319 usba_ep_writel(target, SET_STA, USBA_FORCE_STALL);
1320 } else
1321 goto delegate;
1322
1323 send_status(udc, ep);
1324 break;
1325 }
1326
1327 case USB_REQ_SET_ADDRESS:
1328 if (crq->bRequestType != (USB_DIR_OUT | USB_RECIP_DEVICE))
1329 goto delegate;
1330
1331 set_address(udc, le16_to_cpu(crq->wValue));
1332 send_status(udc, ep);
1333 ep->state = STATUS_STAGE_ADDR;
1334 break;
1335
1336 default:
1337 delegate:
1338 spin_unlock(&udc->lock);
1339 retval = udc->driver->setup(&udc->gadget, crq);
1340 spin_lock(&udc->lock);
1341 }
1342
1343 return retval;
1344
1345 stall:
1346 pr_err("udc: %s: Invalid setup request: %02x.%02x v%04x i%04x l%d, "
1347 "halting endpoint...\n",
1348 ep->ep.name, crq->bRequestType, crq->bRequest,
1349 le16_to_cpu(crq->wValue), le16_to_cpu(crq->wIndex),
1350 le16_to_cpu(crq->wLength));
1351 set_protocol_stall(udc, ep);
1352 return -1;
1353 }
1354
1355 static void usba_control_irq(struct usba_udc *udc, struct usba_ep *ep)
1356 {
1357 struct usba_request *req;
1358 u32 epstatus;
1359 u32 epctrl;
1360
1361 restart:
1362 epstatus = usba_ep_readl(ep, STA);
1363 epctrl = usba_ep_readl(ep, CTL);
1364
1365 DBG(DBG_INT, "%s [%d]: s/%08x c/%08x\n",
1366 ep->ep.name, ep->state, epstatus, epctrl);
1367
1368 req = NULL;
1369 if (!list_empty(&ep->queue))
1370 req = list_entry(ep->queue.next,
1371 struct usba_request, queue);
1372
1373 if ((epctrl & USBA_TX_PK_RDY) && !(epstatus & USBA_TX_PK_RDY)) {
1374 if (req->submitted)
1375 next_fifo_transaction(ep, req);
1376 else
1377 submit_request(ep, req);
1378
1379 if (req->last_transaction) {
1380 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
1381 usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
1382 }
1383 goto restart;
1384 }
1385 if ((epstatus & epctrl) & USBA_TX_COMPLETE) {
1386 usba_ep_writel(ep, CLR_STA, USBA_TX_COMPLETE);
1387
1388 switch (ep->state) {
1389 case DATA_STAGE_IN:
1390 usba_ep_writel(ep, CTL_ENB, USBA_RX_BK_RDY);
1391 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1392 ep->state = STATUS_STAGE_OUT;
1393 break;
1394 case STATUS_STAGE_ADDR:
1395 /* Activate our new address */
1396 usba_writel(udc, CTRL, (usba_readl(udc, CTRL)
1397 | USBA_FADDR_EN));
1398 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1399 ep->state = WAIT_FOR_SETUP;
1400 break;
1401 case STATUS_STAGE_IN:
1402 if (req) {
1403 list_del_init(&req->queue);
1404 request_complete(ep, req, 0);
1405 submit_next_request(ep);
1406 }
1407 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1408 ep->state = WAIT_FOR_SETUP;
1409 break;
1410 case STATUS_STAGE_TEST:
1411 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1412 ep->state = WAIT_FOR_SETUP;
1413 if (do_test_mode(udc))
1414 set_protocol_stall(udc, ep);
1415 break;
1416 default:
1417 pr_err("udc: %s: TXCOMP: Invalid endpoint state %d, "
1418 "halting endpoint...\n",
1419 ep->ep.name, ep->state);
1420 set_protocol_stall(udc, ep);
1421 break;
1422 }
1423
1424 goto restart;
1425 }
1426 if ((epstatus & epctrl) & USBA_RX_BK_RDY) {
1427 switch (ep->state) {
1428 case STATUS_STAGE_OUT:
1429 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1430 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1431
1432 if (req) {
1433 list_del_init(&req->queue);
1434 request_complete(ep, req, 0);
1435 }
1436 ep->state = WAIT_FOR_SETUP;
1437 break;
1438
1439 case DATA_STAGE_OUT:
1440 receive_data(ep);
1441 break;
1442
1443 default:
1444 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1445 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1446 pr_err("udc: %s: RXRDY: Invalid endpoint state %d, "
1447 "halting endpoint...\n",
1448 ep->ep.name, ep->state);
1449 set_protocol_stall(udc, ep);
1450 break;
1451 }
1452
1453 goto restart;
1454 }
1455 if (epstatus & USBA_RX_SETUP) {
1456 union {
1457 struct usb_ctrlrequest crq;
1458 unsigned long data[2];
1459 } crq;
1460 unsigned int pkt_len;
1461 int ret;
1462
1463 if (ep->state != WAIT_FOR_SETUP) {
1464 /*
1465 * Didn't expect a SETUP packet at this
1466 * point. Clean up any pending requests (which
1467 * may be successful).
1468 */
1469 int status = -EPROTO;
1470
1471 /*
1472 * RXRDY and TXCOMP are dropped when SETUP
1473 * packets arrive. Just pretend we received
1474 * the status packet.
1475 */
1476 if (ep->state == STATUS_STAGE_OUT
1477 || ep->state == STATUS_STAGE_IN) {
1478 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1479 status = 0;
1480 }
1481
1482 if (req) {
1483 list_del_init(&req->queue);
1484 request_complete(ep, req, status);
1485 }
1486 }
1487
1488 pkt_len = USBA_BFEXT(BYTE_COUNT, usba_ep_readl(ep, STA));
1489 DBG(DBG_HW, "Packet length: %u\n", pkt_len);
1490 if (pkt_len != sizeof(crq)) {
1491 pr_warning("udc: Invalid packet length %u "
1492 "(expected %zu)\n", pkt_len, sizeof(crq));
1493 set_protocol_stall(udc, ep);
1494 return;
1495 }
1496
1497 DBG(DBG_FIFO, "Copying ctrl request from 0x%p:\n", ep->fifo);
1498 memcpy_fromio(crq.data, ep->fifo, sizeof(crq));
1499
1500 /* Free up one bank in the FIFO so that we can
1501 * generate or receive a reply right away. */
1502 usba_ep_writel(ep, CLR_STA, USBA_RX_SETUP);
1503
1504 /* printk(KERN_DEBUG "setup: %d: %02x.%02x\n",
1505 ep->state, crq.crq.bRequestType,
1506 crq.crq.bRequest); */
1507
1508 if (crq.crq.bRequestType & USB_DIR_IN) {
1509 /*
1510 * The USB 2.0 spec states that "if wLength is
1511 * zero, there is no data transfer phase."
1512 * However, testusb #14 seems to actually
1513 * expect a data phase even if wLength = 0...
1514 */
1515 ep->state = DATA_STAGE_IN;
1516 } else {
1517 if (crq.crq.wLength != __constant_cpu_to_le16(0))
1518 ep->state = DATA_STAGE_OUT;
1519 else
1520 ep->state = STATUS_STAGE_IN;
1521 }
1522
1523 ret = -1;
1524 if (ep->index == 0)
1525 ret = handle_ep0_setup(udc, ep, &crq.crq);
1526 else {
1527 spin_unlock(&udc->lock);
1528 ret = udc->driver->setup(&udc->gadget, &crq.crq);
1529 spin_lock(&udc->lock);
1530 }
1531
1532 DBG(DBG_BUS, "req %02x.%02x, length %d, state %d, ret %d\n",
1533 crq.crq.bRequestType, crq.crq.bRequest,
1534 le16_to_cpu(crq.crq.wLength), ep->state, ret);
1535
1536 if (ret < 0) {
1537 /* Let the host know that we failed */
1538 set_protocol_stall(udc, ep);
1539 }
1540 }
1541 }
1542
1543 static void usba_ep_irq(struct usba_udc *udc, struct usba_ep *ep)
1544 {
1545 struct usba_request *req;
1546 u32 epstatus;
1547 u32 epctrl;
1548
1549 epstatus = usba_ep_readl(ep, STA);
1550 epctrl = usba_ep_readl(ep, CTL);
1551
1552 DBG(DBG_INT, "%s: interrupt, status: 0x%08x\n", ep->ep.name, epstatus);
1553
1554 while ((epctrl & USBA_TX_PK_RDY) && !(epstatus & USBA_TX_PK_RDY)) {
1555 DBG(DBG_BUS, "%s: TX PK ready\n", ep->ep.name);
1556
1557 if (list_empty(&ep->queue)) {
1558 dev_warn(&udc->pdev->dev, "ep_irq: queue empty\n");
1559 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
1560 return;
1561 }
1562
1563 req = list_entry(ep->queue.next, struct usba_request, queue);
1564
1565 if (req->using_dma) {
1566 /* Send a zero-length packet */
1567 usba_ep_writel(ep, SET_STA,
1568 USBA_TX_PK_RDY);
1569 usba_ep_writel(ep, CTL_DIS,
1570 USBA_TX_PK_RDY);
1571 list_del_init(&req->queue);
1572 submit_next_request(ep);
1573 request_complete(ep, req, 0);
1574 } else {
1575 if (req->submitted)
1576 next_fifo_transaction(ep, req);
1577 else
1578 submit_request(ep, req);
1579
1580 if (req->last_transaction) {
1581 list_del_init(&req->queue);
1582 submit_next_request(ep);
1583 request_complete(ep, req, 0);
1584 }
1585 }
1586
1587 epstatus = usba_ep_readl(ep, STA);
1588 epctrl = usba_ep_readl(ep, CTL);
1589 }
1590 if ((epstatus & epctrl) & USBA_RX_BK_RDY) {
1591 DBG(DBG_BUS, "%s: RX data ready\n", ep->ep.name);
1592 receive_data(ep);
1593 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1594 }
1595 }
1596
1597 static void usba_dma_irq(struct usba_udc *udc, struct usba_ep *ep)
1598 {
1599 struct usba_request *req;
1600 u32 status, control, pending;
1601
1602 status = usba_dma_readl(ep, STATUS);
1603 control = usba_dma_readl(ep, CONTROL);
1604 #ifdef CONFIG_USB_GADGET_DEBUG_FS
1605 ep->last_dma_status = status;
1606 #endif
1607 pending = status & control;
1608 DBG(DBG_INT | DBG_DMA, "dma irq, s/%#08x, c/%#08x\n", status, control);
1609
1610 if (status & USBA_DMA_CH_EN) {
1611 dev_err(&udc->pdev->dev,
1612 "DMA_CH_EN is set after transfer is finished!\n");
1613 dev_err(&udc->pdev->dev,
1614 "status=%#08x, pending=%#08x, control=%#08x\n",
1615 status, pending, control);
1616
1617 /*
1618 * try to pretend nothing happened. We might have to
1619 * do something here...
1620 */
1621 }
1622
1623 if (list_empty(&ep->queue))
1624 /* Might happen if a reset comes along at the right moment */
1625 return;
1626
1627 if (pending & (USBA_DMA_END_TR_ST | USBA_DMA_END_BUF_ST)) {
1628 req = list_entry(ep->queue.next, struct usba_request, queue);
1629 usba_update_req(ep, req, status);
1630
1631 list_del_init(&req->queue);
1632 submit_next_request(ep);
1633 request_complete(ep, req, 0);
1634 }
1635 }
1636
1637 static irqreturn_t usba_udc_irq(int irq, void *devid)
1638 {
1639 struct usba_udc *udc = devid;
1640 u32 status;
1641 u32 dma_status;
1642 u32 ep_status;
1643
1644 spin_lock(&udc->lock);
1645
1646 status = usba_readl(udc, INT_STA);
1647 DBG(DBG_INT, "irq, status=%#08x\n", status);
1648
1649 if (status & USBA_DET_SUSPEND) {
1650 toggle_bias(0);
1651 usba_writel(udc, INT_CLR, USBA_DET_SUSPEND);
1652 DBG(DBG_BUS, "Suspend detected\n");
1653 if (udc->gadget.speed != USB_SPEED_UNKNOWN
1654 && udc->driver && udc->driver->suspend) {
1655 spin_unlock(&udc->lock);
1656 udc->driver->suspend(&udc->gadget);
1657 spin_lock(&udc->lock);
1658 }
1659 }
1660
1661 if (status & USBA_WAKE_UP) {
1662 toggle_bias(1);
1663 usba_writel(udc, INT_CLR, USBA_WAKE_UP);
1664 DBG(DBG_BUS, "Wake Up CPU detected\n");
1665 }
1666
1667 if (status & USBA_END_OF_RESUME) {
1668 usba_writel(udc, INT_CLR, USBA_END_OF_RESUME);
1669 DBG(DBG_BUS, "Resume detected\n");
1670 if (udc->gadget.speed != USB_SPEED_UNKNOWN
1671 && udc->driver && udc->driver->resume) {
1672 spin_unlock(&udc->lock);
1673 udc->driver->resume(&udc->gadget);
1674 spin_lock(&udc->lock);
1675 }
1676 }
1677
1678 dma_status = USBA_BFEXT(DMA_INT, status);
1679 if (dma_status) {
1680 int i;
1681
1682 for (i = 1; i < USBA_NR_ENDPOINTS; i++)
1683 if (dma_status & (1 << i))
1684 usba_dma_irq(udc, &usba_ep[i]);
1685 }
1686
1687 ep_status = USBA_BFEXT(EPT_INT, status);
1688 if (ep_status) {
1689 int i;
1690
1691 for (i = 0; i < USBA_NR_ENDPOINTS; i++)
1692 if (ep_status & (1 << i)) {
1693 if (ep_is_control(&usba_ep[i]))
1694 usba_control_irq(udc, &usba_ep[i]);
1695 else
1696 usba_ep_irq(udc, &usba_ep[i]);
1697 }
1698 }
1699
1700 if (status & USBA_END_OF_RESET) {
1701 struct usba_ep *ep0;
1702
1703 usba_writel(udc, INT_CLR, USBA_END_OF_RESET);
1704 reset_all_endpoints(udc);
1705
1706 if (udc->gadget.speed != USB_SPEED_UNKNOWN
1707 && udc->driver->disconnect) {
1708 udc->gadget.speed = USB_SPEED_UNKNOWN;
1709 spin_unlock(&udc->lock);
1710 udc->driver->disconnect(&udc->gadget);
1711 spin_lock(&udc->lock);
1712 }
1713
1714 if (status & USBA_HIGH_SPEED) {
1715 DBG(DBG_BUS, "High-speed bus reset detected\n");
1716 udc->gadget.speed = USB_SPEED_HIGH;
1717 } else {
1718 DBG(DBG_BUS, "Full-speed bus reset detected\n");
1719 udc->gadget.speed = USB_SPEED_FULL;
1720 }
1721
1722 ep0 = &usba_ep[0];
1723 ep0->desc = &usba_ep0_desc;
1724 ep0->state = WAIT_FOR_SETUP;
1725 usba_ep_writel(ep0, CFG,
1726 (USBA_BF(EPT_SIZE, EP0_EPT_SIZE)
1727 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_CONTROL)
1728 | USBA_BF(BK_NUMBER, USBA_BK_NUMBER_ONE)));
1729 usba_ep_writel(ep0, CTL_ENB,
1730 USBA_EPT_ENABLE | USBA_RX_SETUP);
1731 usba_writel(udc, INT_ENB,
1732 (usba_readl(udc, INT_ENB)
1733 | USBA_BF(EPT_INT, 1)
1734 | USBA_DET_SUSPEND
1735 | USBA_END_OF_RESUME));
1736
1737 /*
1738 * Unclear why we hit this irregularly, e.g. in usbtest,
1739 * but it's clearly harmless...
1740 */
1741 if (!(usba_ep_readl(ep0, CFG) & USBA_EPT_MAPPED))
1742 dev_dbg(&udc->pdev->dev,
1743 "ODD: EP0 configuration is invalid!\n");
1744 }
1745
1746 spin_unlock(&udc->lock);
1747
1748 return IRQ_HANDLED;
1749 }
1750
1751 static irqreturn_t usba_vbus_irq(int irq, void *devid)
1752 {
1753 struct usba_udc *udc = devid;
1754 int vbus;
1755
1756 /* debounce */
1757 udelay(10);
1758
1759 spin_lock(&udc->lock);
1760
1761 /* May happen if Vbus pin toggles during probe() */
1762 if (!udc->driver)
1763 goto out;
1764
1765 vbus = gpio_get_value(udc->vbus_pin);
1766 if (vbus != udc->vbus_prev) {
1767 if (vbus) {
1768 toggle_bias(1);
1769 usba_writel(udc, CTRL, USBA_ENABLE_MASK);
1770 usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
1771 } else {
1772 udc->gadget.speed = USB_SPEED_UNKNOWN;
1773 reset_all_endpoints(udc);
1774 toggle_bias(0);
1775 usba_writel(udc, CTRL, USBA_DISABLE_MASK);
1776 if (udc->driver->disconnect) {
1777 spin_unlock(&udc->lock);
1778 udc->driver->disconnect(&udc->gadget);
1779 spin_lock(&udc->lock);
1780 }
1781 }
1782 udc->vbus_prev = vbus;
1783 }
1784
1785 out:
1786 spin_unlock(&udc->lock);
1787
1788 return IRQ_HANDLED;
1789 }
1790
1791 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1792 {
1793 struct usba_udc *udc = &the_udc;
1794 unsigned long flags;
1795 int ret;
1796
1797 if (!udc->pdev)
1798 return -ENODEV;
1799
1800 spin_lock_irqsave(&udc->lock, flags);
1801 if (udc->driver) {
1802 spin_unlock_irqrestore(&udc->lock, flags);
1803 return -EBUSY;
1804 }
1805
1806 udc->devstatus = 1 << USB_DEVICE_SELF_POWERED;
1807 udc->driver = driver;
1808 udc->gadget.dev.driver = &driver->driver;
1809 spin_unlock_irqrestore(&udc->lock, flags);
1810
1811 clk_enable(udc->pclk);
1812 clk_enable(udc->hclk);
1813
1814 ret = driver->bind(&udc->gadget);
1815 if (ret) {
1816 DBG(DBG_ERR, "Could not bind to driver %s: error %d\n",
1817 driver->driver.name, ret);
1818 goto err_driver_bind;
1819 }
1820
1821 DBG(DBG_GADGET, "registered driver `%s'\n", driver->driver.name);
1822
1823 udc->vbus_prev = 0;
1824 if (udc->vbus_pin != -1)
1825 enable_irq(gpio_to_irq(udc->vbus_pin));
1826
1827 /* If Vbus is present, enable the controller and wait for reset */
1828 spin_lock_irqsave(&udc->lock, flags);
1829 if (vbus_is_present(udc) && udc->vbus_prev == 0) {
1830 toggle_bias(1);
1831 usba_writel(udc, CTRL, USBA_ENABLE_MASK);
1832 usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
1833 }
1834 spin_unlock_irqrestore(&udc->lock, flags);
1835
1836 return 0;
1837
1838 err_driver_bind:
1839 udc->driver = NULL;
1840 udc->gadget.dev.driver = NULL;
1841 return ret;
1842 }
1843 EXPORT_SYMBOL(usb_gadget_register_driver);
1844
1845 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1846 {
1847 struct usba_udc *udc = &the_udc;
1848 unsigned long flags;
1849
1850 if (!udc->pdev)
1851 return -ENODEV;
1852 if (driver != udc->driver || !driver->unbind)
1853 return -EINVAL;
1854
1855 if (udc->vbus_pin != -1)
1856 disable_irq(gpio_to_irq(udc->vbus_pin));
1857
1858 spin_lock_irqsave(&udc->lock, flags);
1859 udc->gadget.speed = USB_SPEED_UNKNOWN;
1860 reset_all_endpoints(udc);
1861 spin_unlock_irqrestore(&udc->lock, flags);
1862
1863 /* This will also disable the DP pullup */
1864 toggle_bias(0);
1865 usba_writel(udc, CTRL, USBA_DISABLE_MASK);
1866
1867 if (udc->driver->disconnect)
1868 udc->driver->disconnect(&udc->gadget);
1869
1870 driver->unbind(&udc->gadget);
1871 udc->gadget.dev.driver = NULL;
1872 udc->driver = NULL;
1873
1874 clk_disable(udc->hclk);
1875 clk_disable(udc->pclk);
1876
1877 DBG(DBG_GADGET, "unregistered driver `%s'\n", driver->driver.name);
1878
1879 return 0;
1880 }
1881 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1882
1883 static int __init usba_udc_probe(struct platform_device *pdev)
1884 {
1885 struct usba_platform_data *pdata = pdev->dev.platform_data;
1886 struct resource *regs, *fifo;
1887 struct clk *pclk, *hclk;
1888 struct usba_udc *udc = &the_udc;
1889 int irq, ret, i;
1890
1891 regs = platform_get_resource(pdev, IORESOURCE_MEM, CTRL_IOMEM_ID);
1892 fifo = platform_get_resource(pdev, IORESOURCE_MEM, FIFO_IOMEM_ID);
1893 if (!regs || !fifo || !pdata)
1894 return -ENXIO;
1895
1896 irq = platform_get_irq(pdev, 0);
1897 if (irq < 0)
1898 return irq;
1899
1900 pclk = clk_get(&pdev->dev, "pclk");
1901 if (IS_ERR(pclk))
1902 return PTR_ERR(pclk);
1903 hclk = clk_get(&pdev->dev, "hclk");
1904 if (IS_ERR(hclk)) {
1905 ret = PTR_ERR(hclk);
1906 goto err_get_hclk;
1907 }
1908
1909 spin_lock_init(&udc->lock);
1910 udc->pdev = pdev;
1911 udc->pclk = pclk;
1912 udc->hclk = hclk;
1913 udc->vbus_pin = -1;
1914
1915 ret = -ENOMEM;
1916 udc->regs = ioremap(regs->start, regs->end - regs->start + 1);
1917 if (!udc->regs) {
1918 dev_err(&pdev->dev, "Unable to map I/O memory, aborting.\n");
1919 goto err_map_regs;
1920 }
1921 dev_info(&pdev->dev, "MMIO registers at 0x%08lx mapped at %p\n",
1922 (unsigned long)regs->start, udc->regs);
1923 udc->fifo = ioremap(fifo->start, fifo->end - fifo->start + 1);
1924 if (!udc->fifo) {
1925 dev_err(&pdev->dev, "Unable to map FIFO, aborting.\n");
1926 goto err_map_fifo;
1927 }
1928 dev_info(&pdev->dev, "FIFO at 0x%08lx mapped at %p\n",
1929 (unsigned long)fifo->start, udc->fifo);
1930
1931 device_initialize(&udc->gadget.dev);
1932 udc->gadget.dev.parent = &pdev->dev;
1933 udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
1934
1935 platform_set_drvdata(pdev, udc);
1936
1937 /* Make sure we start from a clean slate */
1938 clk_enable(pclk);
1939 toggle_bias(0);
1940 usba_writel(udc, CTRL, USBA_DISABLE_MASK);
1941 clk_disable(pclk);
1942
1943 usba_ep = kmalloc(sizeof(struct usba_ep) * pdata->num_ep,
1944 GFP_KERNEL);
1945 if (!usba_ep)
1946 goto err_alloc_ep;
1947
1948 the_udc.gadget.ep0 = &usba_ep[0].ep;
1949
1950 INIT_LIST_HEAD(&usba_ep[0].ep.ep_list);
1951 usba_ep[0].ep_regs = udc->regs + USBA_EPT_BASE(0);
1952 usba_ep[0].dma_regs = udc->regs + USBA_DMA_BASE(0);
1953 usba_ep[0].fifo = udc->fifo + USBA_FIFO_BASE(0);
1954 usba_ep[0].ep.ops = &usba_ep_ops;
1955 usba_ep[0].ep.name = pdata->ep[0].name;
1956 usba_ep[0].ep.maxpacket = pdata->ep[0].fifo_size;
1957 usba_ep[0].udc = &the_udc;
1958 INIT_LIST_HEAD(&usba_ep[0].queue);
1959 usba_ep[0].fifo_size = pdata->ep[0].fifo_size;
1960 usba_ep[0].nr_banks = pdata->ep[0].nr_banks;
1961 usba_ep[0].index = pdata->ep[0].index;
1962 usba_ep[0].can_dma = pdata->ep[0].can_dma;
1963 usba_ep[0].can_isoc = pdata->ep[0].can_isoc;
1964
1965 for (i = 1; i < pdata->num_ep; i++) {
1966 struct usba_ep *ep = &usba_ep[i];
1967
1968 ep->ep_regs = udc->regs + USBA_EPT_BASE(i);
1969 ep->dma_regs = udc->regs + USBA_DMA_BASE(i);
1970 ep->fifo = udc->fifo + USBA_FIFO_BASE(i);
1971 ep->ep.ops = &usba_ep_ops;
1972 ep->ep.name = pdata->ep[i].name;
1973 ep->ep.maxpacket = pdata->ep[i].fifo_size;
1974 ep->udc = &the_udc;
1975 INIT_LIST_HEAD(&ep->queue);
1976 ep->fifo_size = pdata->ep[i].fifo_size;
1977 ep->nr_banks = pdata->ep[i].nr_banks;
1978 ep->index = pdata->ep[i].index;
1979 ep->can_dma = pdata->ep[i].can_dma;
1980 ep->can_isoc = pdata->ep[i].can_isoc;
1981
1982 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
1983 }
1984
1985 ret = request_irq(irq, usba_udc_irq, 0, "atmel_usba_udc", udc);
1986 if (ret) {
1987 dev_err(&pdev->dev, "Cannot request irq %d (error %d)\n",
1988 irq, ret);
1989 goto err_request_irq;
1990 }
1991 udc->irq = irq;
1992
1993 ret = device_add(&udc->gadget.dev);
1994 if (ret) {
1995 dev_dbg(&pdev->dev, "Could not add gadget: %d\n", ret);
1996 goto err_device_add;
1997 }
1998
1999 if (pdata->vbus_pin >= 0) {
2000 if (!gpio_request(pdata->vbus_pin, "atmel_usba_udc")) {
2001 udc->vbus_pin = pdata->vbus_pin;
2002
2003 ret = request_irq(gpio_to_irq(udc->vbus_pin),
2004 usba_vbus_irq, 0,
2005 "atmel_usba_udc", udc);
2006 if (ret) {
2007 gpio_free(udc->vbus_pin);
2008 udc->vbus_pin = -1;
2009 dev_warn(&udc->pdev->dev,
2010 "failed to request vbus irq; "
2011 "assuming always on\n");
2012 } else {
2013 disable_irq(gpio_to_irq(udc->vbus_pin));
2014 }
2015 }
2016 }
2017
2018 usba_init_debugfs(udc);
2019 for (i = 1; i < pdata->num_ep; i++)
2020 usba_ep_init_debugfs(udc, &usba_ep[i]);
2021
2022 return 0;
2023
2024 err_device_add:
2025 free_irq(irq, udc);
2026 err_request_irq:
2027 kfree(usba_ep);
2028 err_alloc_ep:
2029 iounmap(udc->fifo);
2030 err_map_fifo:
2031 iounmap(udc->regs);
2032 err_map_regs:
2033 clk_put(hclk);
2034 err_get_hclk:
2035 clk_put(pclk);
2036
2037 platform_set_drvdata(pdev, NULL);
2038
2039 return ret;
2040 }
2041
2042 static int __exit usba_udc_remove(struct platform_device *pdev)
2043 {
2044 struct usba_udc *udc;
2045 int i;
2046 struct usba_platform_data *pdata = pdev->dev.platform_data;
2047
2048 udc = platform_get_drvdata(pdev);
2049
2050 for (i = 1; i < pdata->num_ep; i++)
2051 usba_ep_cleanup_debugfs(&usba_ep[i]);
2052 usba_cleanup_debugfs(udc);
2053
2054 if (udc->vbus_pin != -1)
2055 gpio_free(udc->vbus_pin);
2056
2057 free_irq(udc->irq, udc);
2058 kfree(usba_ep);
2059 iounmap(udc->fifo);
2060 iounmap(udc->regs);
2061 clk_put(udc->hclk);
2062 clk_put(udc->pclk);
2063
2064 device_unregister(&udc->gadget.dev);
2065
2066 return 0;
2067 }
2068
2069 static struct platform_driver udc_driver = {
2070 .remove = __exit_p(usba_udc_remove),
2071 .driver = {
2072 .name = "atmel_usba_udc",
2073 .owner = THIS_MODULE,
2074 },
2075 };
2076
2077 static int __init udc_init(void)
2078 {
2079 return platform_driver_probe(&udc_driver, usba_udc_probe);
2080 }
2081 module_init(udc_init);
2082
2083 static void __exit udc_exit(void)
2084 {
2085 platform_driver_unregister(&udc_driver);
2086 }
2087 module_exit(udc_exit);
2088
2089 MODULE_DESCRIPTION("Atmel USBA UDC driver");
2090 MODULE_AUTHOR("Haavard Skinnemoen <hskinnemoen@atmel.com>");
2091 MODULE_LICENSE("GPL");
2092 MODULE_ALIAS("platform:atmel_usba_udc");
Support for the Chinese Samsung S3C2440 based development boards