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usb gadget: fix platform driver hotplug/coldplug
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / usb / gadget / atmel_usba_udc.c
blobb0db4c31d01854984a9b5b1e6f84d9d6fe88bc1a
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
29 static struct usba_udc the_udc;
30
31 #ifdef CONFIG_USB_GADGET_DEBUG_FS
32 #include <linux/debugfs.h>
33 #include <linux/uaccess.h>
34
35 static 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
59 fail:
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 */
83 static 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
126 static 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
139 static 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
160 out:
161 mutex_unlock(&inode->i_mutex);
162
163 return ret;
164 }
165
166 static 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
181 static int regs_dbg_release(struct inode *inode, struct file *file)
182 {
183 kfree(file->private_data);
184 return 0;
185 }
186
187 const 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
195 const 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
203 static 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
235 err_state:
236 if (ep->can_dma)
237 debugfs_remove(ep->debugfs_dma_status);
238 err_dma_status:
239 debugfs_remove(ep->debugfs_queue);
240 err_queue:
241 debugfs_remove(ep_root);
242 err_root:
243 dev_err(&ep->udc->pdev->dev,
244 "failed to create debugfs directory for %s\n", ep->ep.name);
245 }
246
247 static 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
257 static 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
280 err_regs:
281 debugfs_remove(root);
282 err_root:
283 udc->debugfs_root = NULL;
284 dev_err(&udc->pdev->dev, "debugfs is not available\n");
285 }
286
287 static 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
296 static inline void usba_ep_init_debugfs(struct usba_udc *udc,
297 struct usba_ep *ep)
298 {
299
300 }
301
302 static inline void usba_ep_cleanup_debugfs(struct usba_ep *ep)
303 {
304
305 }
306
307 static inline void usba_init_debugfs(struct usba_udc *udc)
308 {
309
310 }
311
312 static inline void usba_cleanup_debugfs(struct usba_udc *udc)
313 {
314
315 }
316 #endif
317
318 static 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
327 static 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
349 static 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
374 static 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
395 static 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
428 static 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
442 static 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
449 static 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
505 static void
506 request_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
532 static void
533 request_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
543 static int
544 usba_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
662 static 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
698 static struct usb_request *
699 usba_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
715 static void
716 usba_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
725 static 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
783 static int
784 usba_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
827 static void
828 usba_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
833 static 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
865 static 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
913 static 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
958 static 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
965 static 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
973 static 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
985 static 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
992 static int usba_udc_wakeup(struct usb_gadget *gadget)
993 {
994 struct usba_udc *udc = to_usba_udc(gadget);
995 unsigned long flags;
996 u32 ctrl;
997 int ret = -EINVAL;
998
999 spin_lock_irqsave(&udc->lock, flags);
1000 if (udc->devstatus & (1 << USB_DEVICE_REMOTE_WAKEUP)) {
1001 ctrl = usba_readl(udc, CTRL);
1002 usba_writel(udc, CTRL, ctrl | USBA_REMOTE_WAKE_UP);
1003 ret = 0;
1004 }
1005 spin_unlock_irqrestore(&udc->lock, flags);
1006
1007 return ret;
1008 }
1009
1010 static int
1011 usba_udc_set_selfpowered(struct usb_gadget *gadget, int is_selfpowered)
1012 {
1013 struct usba_udc *udc = to_usba_udc(gadget);
1014 unsigned long flags;
1015
1016 spin_lock_irqsave(&udc->lock, flags);
1017 if (is_selfpowered)
1018 udc->devstatus |= 1 << USB_DEVICE_SELF_POWERED;
1019 else
1020 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1021 spin_unlock_irqrestore(&udc->lock, flags);
1022
1023 return 0;
1024 }
1025
1026 static const struct usb_gadget_ops usba_udc_ops = {
1027 .get_frame = usba_udc_get_frame,
1028 .wakeup = usba_udc_wakeup,
1029 .set_selfpowered = usba_udc_set_selfpowered,
1030 };
1031
1032 #define EP(nam, idx, maxpkt, maxbk, dma, isoc) \
1033 { \
1034 .ep = { \
1035 .ops = &usba_ep_ops, \
1036 .name = nam, \
1037 .maxpacket = maxpkt, \
1038 }, \
1039 .udc = &the_udc, \
1040 .queue = LIST_HEAD_INIT(usba_ep[idx].queue), \
1041 .fifo_size = maxpkt, \
1042 .nr_banks = maxbk, \
1043 .index = idx, \
1044 .can_dma = dma, \
1045 .can_isoc = isoc, \
1046 }
1047
1048 static struct usba_ep usba_ep[] = {
1049 EP("ep0", 0, 64, 1, 0, 0),
1050 EP("ep1in-bulk", 1, 512, 2, 1, 1),
1051 EP("ep2out-bulk", 2, 512, 2, 1, 1),
1052 EP("ep3in-int", 3, 64, 3, 1, 0),
1053 EP("ep4out-int", 4, 64, 3, 1, 0),
1054 EP("ep5in-iso", 5, 1024, 3, 1, 1),
1055 EP("ep6out-iso", 6, 1024, 3, 1, 1),
1056 };
1057 #undef EP
1058
1059 static struct usb_endpoint_descriptor usba_ep0_desc = {
1060 .bLength = USB_DT_ENDPOINT_SIZE,
1061 .bDescriptorType = USB_DT_ENDPOINT,
1062 .bEndpointAddress = 0,
1063 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
1064 .wMaxPacketSize = __constant_cpu_to_le16(64),
1065 /* FIXME: I have no idea what to put here */
1066 .bInterval = 1,
1067 };
1068
1069 static void nop_release(struct device *dev)
1070 {
1071
1072 }
1073
1074 static struct usba_udc the_udc = {
1075 .gadget = {
1076 .ops = &usba_udc_ops,
1077 .ep0 = &usba_ep[0].ep,
1078 .ep_list = LIST_HEAD_INIT(the_udc.gadget.ep_list),
1079 .is_dualspeed = 1,
1080 .name = "atmel_usba_udc",
1081 .dev = {
1082 .bus_id = "gadget",
1083 .release = nop_release,
1084 },
1085 },
1086
1087 .lock = SPIN_LOCK_UNLOCKED,
1088 };
1089
1090 /*
1091 * Called with interrupts disabled and udc->lock held.
1092 */
1093 static void reset_all_endpoints(struct usba_udc *udc)
1094 {
1095 struct usba_ep *ep;
1096 struct usba_request *req, *tmp_req;
1097
1098 usba_writel(udc, EPT_RST, ~0UL);
1099
1100 ep = to_usba_ep(udc->gadget.ep0);
1101 list_for_each_entry_safe(req, tmp_req, &ep->queue, queue) {
1102 list_del_init(&req->queue);
1103 request_complete(ep, req, -ECONNRESET);
1104 }
1105
1106 list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
1107 if (ep->desc) {
1108 spin_unlock(&udc->lock);
1109 usba_ep_disable(&ep->ep);
1110 spin_lock(&udc->lock);
1111 }
1112 }
1113 }
1114
1115 static struct usba_ep *get_ep_by_addr(struct usba_udc *udc, u16 wIndex)
1116 {
1117 struct usba_ep *ep;
1118
1119 if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0)
1120 return to_usba_ep(udc->gadget.ep0);
1121
1122 list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list) {
1123 u8 bEndpointAddress;
1124
1125 if (!ep->desc)
1126 continue;
1127 bEndpointAddress = ep->desc->bEndpointAddress;
1128 if ((wIndex ^ bEndpointAddress) & USB_DIR_IN)
1129 continue;
1130 if ((bEndpointAddress & USB_ENDPOINT_NUMBER_MASK)
1131 == (wIndex & USB_ENDPOINT_NUMBER_MASK))
1132 return ep;
1133 }
1134
1135 return NULL;
1136 }
1137
1138 /* Called with interrupts disabled and udc->lock held */
1139 static inline void set_protocol_stall(struct usba_udc *udc, struct usba_ep *ep)
1140 {
1141 usba_ep_writel(ep, SET_STA, USBA_FORCE_STALL);
1142 ep->state = WAIT_FOR_SETUP;
1143 }
1144
1145 static inline int is_stalled(struct usba_udc *udc, struct usba_ep *ep)
1146 {
1147 if (usba_ep_readl(ep, STA) & USBA_FORCE_STALL)
1148 return 1;
1149 return 0;
1150 }
1151
1152 static inline void set_address(struct usba_udc *udc, unsigned int addr)
1153 {
1154 u32 regval;
1155
1156 DBG(DBG_BUS, "setting address %u...\n", addr);
1157 regval = usba_readl(udc, CTRL);
1158 regval = USBA_BFINS(DEV_ADDR, addr, regval);
1159 usba_writel(udc, CTRL, regval);
1160 }
1161
1162 static int do_test_mode(struct usba_udc *udc)
1163 {
1164 static const char test_packet_buffer[] = {
1165 /* JKJKJKJK * 9 */
1166 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
1167 /* JJKKJJKK * 8 */
1168 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA,
1169 /* JJKKJJKK * 8 */
1170 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE,
1171 /* JJJJJJJKKKKKKK * 8 */
1172 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
1173 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
1174 /* JJJJJJJK * 8 */
1175 0x7F, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD,
1176 /* {JKKKKKKK * 10}, JK */
1177 0xFC, 0x7E, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD, 0x7E
1178 };
1179 struct usba_ep *ep;
1180 struct device *dev = &udc->pdev->dev;
1181 int test_mode;
1182
1183 test_mode = udc->test_mode;
1184
1185 /* Start from a clean slate */
1186 reset_all_endpoints(udc);
1187
1188 switch (test_mode) {
1189 case 0x0100:
1190 /* Test_J */
1191 usba_writel(udc, TST, USBA_TST_J_MODE);
1192 dev_info(dev, "Entering Test_J mode...\n");
1193 break;
1194 case 0x0200:
1195 /* Test_K */
1196 usba_writel(udc, TST, USBA_TST_K_MODE);
1197 dev_info(dev, "Entering Test_K mode...\n");
1198 break;
1199 case 0x0300:
1200 /*
1201 * Test_SE0_NAK: Force high-speed mode and set up ep0
1202 * for Bulk IN transfers
1203 */
1204 ep = &usba_ep[0];
1205 usba_writel(udc, TST,
1206 USBA_BF(SPEED_CFG, USBA_SPEED_CFG_FORCE_HIGH));
1207 usba_ep_writel(ep, CFG,
1208 USBA_BF(EPT_SIZE, USBA_EPT_SIZE_64)
1209 | USBA_EPT_DIR_IN
1210 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK)
1211 | USBA_BF(BK_NUMBER, 1));
1212 if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED)) {
1213 set_protocol_stall(udc, ep);
1214 dev_err(dev, "Test_SE0_NAK: ep0 not mapped\n");
1215 } else {
1216 usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
1217 dev_info(dev, "Entering Test_SE0_NAK mode...\n");
1218 }
1219 break;
1220 case 0x0400:
1221 /* Test_Packet */
1222 ep = &usba_ep[0];
1223 usba_ep_writel(ep, CFG,
1224 USBA_BF(EPT_SIZE, USBA_EPT_SIZE_64)
1225 | USBA_EPT_DIR_IN
1226 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_BULK)
1227 | USBA_BF(BK_NUMBER, 1));
1228 if (!(usba_ep_readl(ep, CFG) & USBA_EPT_MAPPED)) {
1229 set_protocol_stall(udc, ep);
1230 dev_err(dev, "Test_Packet: ep0 not mapped\n");
1231 } else {
1232 usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
1233 usba_writel(udc, TST, USBA_TST_PKT_MODE);
1234 copy_to_fifo(ep->fifo, test_packet_buffer,
1235 sizeof(test_packet_buffer));
1236 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
1237 dev_info(dev, "Entering Test_Packet mode...\n");
1238 }
1239 break;
1240 default:
1241 dev_err(dev, "Invalid test mode: 0x%04x\n", test_mode);
1242 return -EINVAL;
1243 }
1244
1245 return 0;
1246 }
1247
1248 /* Avoid overly long expressions */
1249 static inline bool feature_is_dev_remote_wakeup(struct usb_ctrlrequest *crq)
1250 {
1251 if (crq->wValue == __constant_cpu_to_le16(USB_DEVICE_REMOTE_WAKEUP))
1252 return true;
1253 return false;
1254 }
1255
1256 static inline bool feature_is_dev_test_mode(struct usb_ctrlrequest *crq)
1257 {
1258 if (crq->wValue == __constant_cpu_to_le16(USB_DEVICE_TEST_MODE))
1259 return true;
1260 return false;
1261 }
1262
1263 static inline bool feature_is_ep_halt(struct usb_ctrlrequest *crq)
1264 {
1265 if (crq->wValue == __constant_cpu_to_le16(USB_ENDPOINT_HALT))
1266 return true;
1267 return false;
1268 }
1269
1270 static int handle_ep0_setup(struct usba_udc *udc, struct usba_ep *ep,
1271 struct usb_ctrlrequest *crq)
1272 {
1273 int retval = 0;;
1274
1275 switch (crq->bRequest) {
1276 case USB_REQ_GET_STATUS: {
1277 u16 status;
1278
1279 if (crq->bRequestType == (USB_DIR_IN | USB_RECIP_DEVICE)) {
1280 status = cpu_to_le16(udc->devstatus);
1281 } else if (crq->bRequestType
1282 == (USB_DIR_IN | USB_RECIP_INTERFACE)) {
1283 status = __constant_cpu_to_le16(0);
1284 } else if (crq->bRequestType
1285 == (USB_DIR_IN | USB_RECIP_ENDPOINT)) {
1286 struct usba_ep *target;
1287
1288 target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1289 if (!target)
1290 goto stall;
1291
1292 status = 0;
1293 if (is_stalled(udc, target))
1294 status |= __constant_cpu_to_le16(1);
1295 } else
1296 goto delegate;
1297
1298 /* Write directly to the FIFO. No queueing is done. */
1299 if (crq->wLength != __constant_cpu_to_le16(sizeof(status)))
1300 goto stall;
1301 ep->state = DATA_STAGE_IN;
1302 __raw_writew(status, ep->fifo);
1303 usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
1304 break;
1305 }
1306
1307 case USB_REQ_CLEAR_FEATURE: {
1308 if (crq->bRequestType == USB_RECIP_DEVICE) {
1309 if (feature_is_dev_remote_wakeup(crq))
1310 udc->devstatus
1311 &= ~(1 << USB_DEVICE_REMOTE_WAKEUP);
1312 else
1313 /* Can't CLEAR_FEATURE TEST_MODE */
1314 goto stall;
1315 } else if (crq->bRequestType == USB_RECIP_ENDPOINT) {
1316 struct usba_ep *target;
1317
1318 if (crq->wLength != __constant_cpu_to_le16(0)
1319 || !feature_is_ep_halt(crq))
1320 goto stall;
1321 target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1322 if (!target)
1323 goto stall;
1324
1325 usba_ep_writel(target, CLR_STA, USBA_FORCE_STALL);
1326 if (target->index != 0)
1327 usba_ep_writel(target, CLR_STA,
1328 USBA_TOGGLE_CLR);
1329 } else {
1330 goto delegate;
1331 }
1332
1333 send_status(udc, ep);
1334 break;
1335 }
1336
1337 case USB_REQ_SET_FEATURE: {
1338 if (crq->bRequestType == USB_RECIP_DEVICE) {
1339 if (feature_is_dev_test_mode(crq)) {
1340 send_status(udc, ep);
1341 ep->state = STATUS_STAGE_TEST;
1342 udc->test_mode = le16_to_cpu(crq->wIndex);
1343 return 0;
1344 } else if (feature_is_dev_remote_wakeup(crq)) {
1345 udc->devstatus |= 1 << USB_DEVICE_REMOTE_WAKEUP;
1346 } else {
1347 goto stall;
1348 }
1349 } else if (crq->bRequestType == USB_RECIP_ENDPOINT) {
1350 struct usba_ep *target;
1351
1352 if (crq->wLength != __constant_cpu_to_le16(0)
1353 || !feature_is_ep_halt(crq))
1354 goto stall;
1355
1356 target = get_ep_by_addr(udc, le16_to_cpu(crq->wIndex));
1357 if (!target)
1358 goto stall;
1359
1360 usba_ep_writel(target, SET_STA, USBA_FORCE_STALL);
1361 } else
1362 goto delegate;
1363
1364 send_status(udc, ep);
1365 break;
1366 }
1367
1368 case USB_REQ_SET_ADDRESS:
1369 if (crq->bRequestType != (USB_DIR_OUT | USB_RECIP_DEVICE))
1370 goto delegate;
1371
1372 set_address(udc, le16_to_cpu(crq->wValue));
1373 send_status(udc, ep);
1374 ep->state = STATUS_STAGE_ADDR;
1375 break;
1376
1377 default:
1378 delegate:
1379 spin_unlock(&udc->lock);
1380 retval = udc->driver->setup(&udc->gadget, crq);
1381 spin_lock(&udc->lock);
1382 }
1383
1384 return retval;
1385
1386 stall:
1387 pr_err("udc: %s: Invalid setup request: %02x.%02x v%04x i%04x l%d, "
1388 "halting endpoint...\n",
1389 ep->ep.name, crq->bRequestType, crq->bRequest,
1390 le16_to_cpu(crq->wValue), le16_to_cpu(crq->wIndex),
1391 le16_to_cpu(crq->wLength));
1392 set_protocol_stall(udc, ep);
1393 return -1;
1394 }
1395
1396 static void usba_control_irq(struct usba_udc *udc, struct usba_ep *ep)
1397 {
1398 struct usba_request *req;
1399 u32 epstatus;
1400 u32 epctrl;
1401
1402 restart:
1403 epstatus = usba_ep_readl(ep, STA);
1404 epctrl = usba_ep_readl(ep, CTL);
1405
1406 DBG(DBG_INT, "%s [%d]: s/%08x c/%08x\n",
1407 ep->ep.name, ep->state, epstatus, epctrl);
1408
1409 req = NULL;
1410 if (!list_empty(&ep->queue))
1411 req = list_entry(ep->queue.next,
1412 struct usba_request, queue);
1413
1414 if ((epctrl & USBA_TX_PK_RDY) && !(epstatus & USBA_TX_PK_RDY)) {
1415 if (req->submitted)
1416 next_fifo_transaction(ep, req);
1417 else
1418 submit_request(ep, req);
1419
1420 if (req->last_transaction) {
1421 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
1422 usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
1423 }
1424 goto restart;
1425 }
1426 if ((epstatus & epctrl) & USBA_TX_COMPLETE) {
1427 usba_ep_writel(ep, CLR_STA, USBA_TX_COMPLETE);
1428
1429 switch (ep->state) {
1430 case DATA_STAGE_IN:
1431 usba_ep_writel(ep, CTL_ENB, USBA_RX_BK_RDY);
1432 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1433 ep->state = STATUS_STAGE_OUT;
1434 break;
1435 case STATUS_STAGE_ADDR:
1436 /* Activate our new address */
1437 usba_writel(udc, CTRL, (usba_readl(udc, CTRL)
1438 | USBA_FADDR_EN));
1439 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1440 ep->state = WAIT_FOR_SETUP;
1441 break;
1442 case STATUS_STAGE_IN:
1443 if (req) {
1444 list_del_init(&req->queue);
1445 request_complete(ep, req, 0);
1446 submit_next_request(ep);
1447 }
1448 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1449 ep->state = WAIT_FOR_SETUP;
1450 break;
1451 case STATUS_STAGE_TEST:
1452 usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
1453 ep->state = WAIT_FOR_SETUP;
1454 if (do_test_mode(udc))
1455 set_protocol_stall(udc, ep);
1456 break;
1457 default:
1458 pr_err("udc: %s: TXCOMP: Invalid endpoint state %d, "
1459 "halting endpoint...\n",
1460 ep->ep.name, ep->state);
1461 set_protocol_stall(udc, ep);
1462 break;
1463 }
1464
1465 goto restart;
1466 }
1467 if ((epstatus & epctrl) & USBA_RX_BK_RDY) {
1468 switch (ep->state) {
1469 case STATUS_STAGE_OUT:
1470 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1471 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1472
1473 if (req) {
1474 list_del_init(&req->queue);
1475 request_complete(ep, req, 0);
1476 }
1477 ep->state = WAIT_FOR_SETUP;
1478 break;
1479
1480 case DATA_STAGE_OUT:
1481 receive_data(ep);
1482 break;
1483
1484 default:
1485 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1486 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1487 pr_err("udc: %s: RXRDY: Invalid endpoint state %d, "
1488 "halting endpoint...\n",
1489 ep->ep.name, ep->state);
1490 set_protocol_stall(udc, ep);
1491 break;
1492 }
1493
1494 goto restart;
1495 }
1496 if (epstatus & USBA_RX_SETUP) {
1497 union {
1498 struct usb_ctrlrequest crq;
1499 unsigned long data[2];
1500 } crq;
1501 unsigned int pkt_len;
1502 int ret;
1503
1504 if (ep->state != WAIT_FOR_SETUP) {
1505 /*
1506 * Didn't expect a SETUP packet at this
1507 * point. Clean up any pending requests (which
1508 * may be successful).
1509 */
1510 int status = -EPROTO;
1511
1512 /*
1513 * RXRDY and TXCOMP are dropped when SETUP
1514 * packets arrive. Just pretend we received
1515 * the status packet.
1516 */
1517 if (ep->state == STATUS_STAGE_OUT
1518 || ep->state == STATUS_STAGE_IN) {
1519 usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
1520 status = 0;
1521 }
1522
1523 if (req) {
1524 list_del_init(&req->queue);
1525 request_complete(ep, req, status);
1526 }
1527 }
1528
1529 pkt_len = USBA_BFEXT(BYTE_COUNT, usba_ep_readl(ep, STA));
1530 DBG(DBG_HW, "Packet length: %u\n", pkt_len);
1531 if (pkt_len != sizeof(crq)) {
1532 pr_warning("udc: Invalid packet length %u "
1533 "(expected %lu)\n", pkt_len, sizeof(crq));
1534 set_protocol_stall(udc, ep);
1535 return;
1536 }
1537
1538 DBG(DBG_FIFO, "Copying ctrl request from 0x%p:\n", ep->fifo);
1539 copy_from_fifo(crq.data, ep->fifo, sizeof(crq));
1540
1541 /* Free up one bank in the FIFO so that we can
1542 * generate or receive a reply right away. */
1543 usba_ep_writel(ep, CLR_STA, USBA_RX_SETUP);
1544
1545 /* printk(KERN_DEBUG "setup: %d: %02x.%02x\n",
1546 ep->state, crq.crq.bRequestType,
1547 crq.crq.bRequest); */
1548
1549 if (crq.crq.bRequestType & USB_DIR_IN) {
1550 /*
1551 * The USB 2.0 spec states that "if wLength is
1552 * zero, there is no data transfer phase."
1553 * However, testusb #14 seems to actually
1554 * expect a data phase even if wLength = 0...
1555 */
1556 ep->state = DATA_STAGE_IN;
1557 } else {
1558 if (crq.crq.wLength != __constant_cpu_to_le16(0))
1559 ep->state = DATA_STAGE_OUT;
1560 else
1561 ep->state = STATUS_STAGE_IN;
1562 }
1563
1564 ret = -1;
1565 if (ep->index == 0)
1566 ret = handle_ep0_setup(udc, ep, &crq.crq);
1567 else {
1568 spin_unlock(&udc->lock);
1569 ret = udc->driver->setup(&udc->gadget, &crq.crq);
1570 spin_lock(&udc->lock);
1571 }
1572
1573 DBG(DBG_BUS, "req %02x.%02x, length %d, state %d, ret %d\n",
1574 crq.crq.bRequestType, crq.crq.bRequest,
1575 le16_to_cpu(crq.crq.wLength), ep->state, ret);
1576
1577 if (ret < 0) {
1578 /* Let the host know that we failed */
1579 set_protocol_stall(udc, ep);
1580 }
1581 }
1582 }
1583
1584 static void usba_ep_irq(struct usba_udc *udc, struct usba_ep *ep)
1585 {
1586 struct usba_request *req;
1587 u32 epstatus;
1588 u32 epctrl;
1589
1590 epstatus = usba_ep_readl(ep, STA);
1591 epctrl = usba_ep_readl(ep, CTL);
1592
1593 DBG(DBG_INT, "%s: interrupt, status: 0x%08x\n", ep->ep.name, epstatus);
1594
1595 while ((epctrl & USBA_TX_PK_RDY) && !(epstatus & USBA_TX_PK_RDY)) {
1596 DBG(DBG_BUS, "%s: TX PK ready\n", ep->ep.name);
1597
1598 if (list_empty(&ep->queue)) {
1599 dev_warn(&udc->pdev->dev, "ep_irq: queue empty\n");
1600 usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
1601 return;
1602 }
1603
1604 req = list_entry(ep->queue.next, struct usba_request, queue);
1605
1606 if (req->using_dma) {
1607 /* Send a zero-length packet */
1608 usba_ep_writel(ep, SET_STA,
1609 USBA_TX_PK_RDY);
1610 usba_ep_writel(ep, CTL_DIS,
1611 USBA_TX_PK_RDY);
1612 list_del_init(&req->queue);
1613 submit_next_request(ep);
1614 request_complete(ep, req, 0);
1615 } else {
1616 if (req->submitted)
1617 next_fifo_transaction(ep, req);
1618 else
1619 submit_request(ep, req);
1620
1621 if (req->last_transaction) {
1622 list_del_init(&req->queue);
1623 submit_next_request(ep);
1624 request_complete(ep, req, 0);
1625 }
1626 }
1627
1628 epstatus = usba_ep_readl(ep, STA);
1629 epctrl = usba_ep_readl(ep, CTL);
1630 }
1631 if ((epstatus & epctrl) & USBA_RX_BK_RDY) {
1632 DBG(DBG_BUS, "%s: RX data ready\n", ep->ep.name);
1633 receive_data(ep);
1634 usba_ep_writel(ep, CLR_STA, USBA_RX_BK_RDY);
1635 }
1636 }
1637
1638 static void usba_dma_irq(struct usba_udc *udc, struct usba_ep *ep)
1639 {
1640 struct usba_request *req;
1641 u32 status, control, pending;
1642
1643 status = usba_dma_readl(ep, STATUS);
1644 control = usba_dma_readl(ep, CONTROL);
1645 #ifdef CONFIG_USB_GADGET_DEBUG_FS
1646 ep->last_dma_status = status;
1647 #endif
1648 pending = status & control;
1649 DBG(DBG_INT | DBG_DMA, "dma irq, s/%#08x, c/%#08x\n", status, control);
1650
1651 if (status & USBA_DMA_CH_EN) {
1652 dev_err(&udc->pdev->dev,
1653 "DMA_CH_EN is set after transfer is finished!\n");
1654 dev_err(&udc->pdev->dev,
1655 "status=%#08x, pending=%#08x, control=%#08x\n",
1656 status, pending, control);
1657
1658 /*
1659 * try to pretend nothing happened. We might have to
1660 * do something here...
1661 */
1662 }
1663
1664 if (list_empty(&ep->queue))
1665 /* Might happen if a reset comes along at the right moment */
1666 return;
1667
1668 if (pending & (USBA_DMA_END_TR_ST | USBA_DMA_END_BUF_ST)) {
1669 req = list_entry(ep->queue.next, struct usba_request, queue);
1670 usba_update_req(ep, req, status);
1671
1672 list_del_init(&req->queue);
1673 submit_next_request(ep);
1674 request_complete(ep, req, 0);
1675 }
1676 }
1677
1678 static irqreturn_t usba_udc_irq(int irq, void *devid)
1679 {
1680 struct usba_udc *udc = devid;
1681 u32 status;
1682 u32 dma_status;
1683 u32 ep_status;
1684
1685 spin_lock(&udc->lock);
1686
1687 status = usba_readl(udc, INT_STA);
1688 DBG(DBG_INT, "irq, status=%#08x\n", status);
1689
1690 if (status & USBA_DET_SUSPEND) {
1691 usba_writel(udc, INT_CLR, USBA_DET_SUSPEND);
1692 DBG(DBG_BUS, "Suspend detected\n");
1693 if (udc->gadget.speed != USB_SPEED_UNKNOWN
1694 && udc->driver && udc->driver->suspend) {
1695 spin_unlock(&udc->lock);
1696 udc->driver->suspend(&udc->gadget);
1697 spin_lock(&udc->lock);
1698 }
1699 }
1700
1701 if (status & USBA_WAKE_UP) {
1702 usba_writel(udc, INT_CLR, USBA_WAKE_UP);
1703 DBG(DBG_BUS, "Wake Up CPU detected\n");
1704 }
1705
1706 if (status & USBA_END_OF_RESUME) {
1707 usba_writel(udc, INT_CLR, USBA_END_OF_RESUME);
1708 DBG(DBG_BUS, "Resume detected\n");
1709 if (udc->gadget.speed != USB_SPEED_UNKNOWN
1710 && udc->driver && udc->driver->resume) {
1711 spin_unlock(&udc->lock);
1712 udc->driver->resume(&udc->gadget);
1713 spin_lock(&udc->lock);
1714 }
1715 }
1716
1717 dma_status = USBA_BFEXT(DMA_INT, status);
1718 if (dma_status) {
1719 int i;
1720
1721 for (i = 1; i < USBA_NR_ENDPOINTS; i++)
1722 if (dma_status & (1 << i))
1723 usba_dma_irq(udc, &usba_ep[i]);
1724 }
1725
1726 ep_status = USBA_BFEXT(EPT_INT, status);
1727 if (ep_status) {
1728 int i;
1729
1730 for (i = 0; i < USBA_NR_ENDPOINTS; i++)
1731 if (ep_status & (1 << i)) {
1732 if (ep_is_control(&usba_ep[i]))
1733 usba_control_irq(udc, &usba_ep[i]);
1734 else
1735 usba_ep_irq(udc, &usba_ep[i]);
1736 }
1737 }
1738
1739 if (status & USBA_END_OF_RESET) {
1740 struct usba_ep *ep0;
1741
1742 usba_writel(udc, INT_CLR, USBA_END_OF_RESET);
1743 reset_all_endpoints(udc);
1744
1745 if (status & USBA_HIGH_SPEED) {
1746 DBG(DBG_BUS, "High-speed bus reset detected\n");
1747 udc->gadget.speed = USB_SPEED_HIGH;
1748 } else {
1749 DBG(DBG_BUS, "Full-speed bus reset detected\n");
1750 udc->gadget.speed = USB_SPEED_FULL;
1751 }
1752
1753 ep0 = &usba_ep[0];
1754 ep0->desc = &usba_ep0_desc;
1755 ep0->state = WAIT_FOR_SETUP;
1756 usba_ep_writel(ep0, CFG,
1757 (USBA_BF(EPT_SIZE, EP0_EPT_SIZE)
1758 | USBA_BF(EPT_TYPE, USBA_EPT_TYPE_CONTROL)
1759 | USBA_BF(BK_NUMBER, USBA_BK_NUMBER_ONE)));
1760 usba_ep_writel(ep0, CTL_ENB,
1761 USBA_EPT_ENABLE | USBA_RX_SETUP);
1762 usba_writel(udc, INT_ENB,
1763 (usba_readl(udc, INT_ENB)
1764 | USBA_BF(EPT_INT, 1)
1765 | USBA_DET_SUSPEND
1766 | USBA_END_OF_RESUME));
1767
1768 if (!(usba_ep_readl(ep0, CFG) & USBA_EPT_MAPPED))
1769 dev_warn(&udc->pdev->dev,
1770 "WARNING: EP0 configuration is invalid!\n");
1771 }
1772
1773 spin_unlock(&udc->lock);
1774
1775 return IRQ_HANDLED;
1776 }
1777
1778 static irqreturn_t usba_vbus_irq(int irq, void *devid)
1779 {
1780 struct usba_udc *udc = devid;
1781 int vbus;
1782
1783 /* debounce */
1784 udelay(10);
1785
1786 spin_lock(&udc->lock);
1787
1788 /* May happen if Vbus pin toggles during probe() */
1789 if (!udc->driver)
1790 goto out;
1791
1792 vbus = gpio_get_value(udc->vbus_pin);
1793 if (vbus != udc->vbus_prev) {
1794 if (vbus) {
1795 usba_writel(udc, CTRL, USBA_EN_USBA);
1796 usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
1797 } else {
1798 udc->gadget.speed = USB_SPEED_UNKNOWN;
1799 reset_all_endpoints(udc);
1800 usba_writel(udc, CTRL, 0);
1801 spin_unlock(&udc->lock);
1802 udc->driver->disconnect(&udc->gadget);
1803 spin_lock(&udc->lock);
1804 }
1805 udc->vbus_prev = vbus;
1806 }
1807
1808 out:
1809 spin_unlock(&udc->lock);
1810
1811 return IRQ_HANDLED;
1812 }
1813
1814 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1815 {
1816 struct usba_udc *udc = &the_udc;
1817 unsigned long flags;
1818 int ret;
1819
1820 if (!udc->pdev)
1821 return -ENODEV;
1822
1823 spin_lock_irqsave(&udc->lock, flags);
1824 if (udc->driver) {
1825 spin_unlock_irqrestore(&udc->lock, flags);
1826 return -EBUSY;
1827 }
1828
1829 udc->devstatus = 1 << USB_DEVICE_SELF_POWERED;
1830 udc->driver = driver;
1831 udc->gadget.dev.driver = &driver->driver;
1832 spin_unlock_irqrestore(&udc->lock, flags);
1833
1834 clk_enable(udc->pclk);
1835 clk_enable(udc->hclk);
1836
1837 ret = driver->bind(&udc->gadget);
1838 if (ret) {
1839 DBG(DBG_ERR, "Could not bind to driver %s: error %d\n",
1840 driver->driver.name, ret);
1841 goto err_driver_bind;
1842 }
1843
1844 DBG(DBG_GADGET, "registered driver `%s'\n", driver->driver.name);
1845
1846 udc->vbus_prev = 0;
1847 if (udc->vbus_pin != -1)
1848 enable_irq(gpio_to_irq(udc->vbus_pin));
1849
1850 /* If Vbus is present, enable the controller and wait for reset */
1851 spin_lock_irqsave(&udc->lock, flags);
1852 if (vbus_is_present(udc) && udc->vbus_prev == 0) {
1853 usba_writel(udc, CTRL, USBA_EN_USBA);
1854 usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
1855 }
1856 spin_unlock_irqrestore(&udc->lock, flags);
1857
1858 return 0;
1859
1860 err_driver_bind:
1861 udc->driver = NULL;
1862 udc->gadget.dev.driver = NULL;
1863 return ret;
1864 }
1865 EXPORT_SYMBOL(usb_gadget_register_driver);
1866
1867 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1868 {
1869 struct usba_udc *udc = &the_udc;
1870 unsigned long flags;
1871
1872 if (!udc->pdev)
1873 return -ENODEV;
1874 if (driver != udc->driver)
1875 return -EINVAL;
1876
1877 if (udc->vbus_pin != -1)
1878 disable_irq(gpio_to_irq(udc->vbus_pin));
1879
1880 spin_lock_irqsave(&udc->lock, flags);
1881 udc->gadget.speed = USB_SPEED_UNKNOWN;
1882 reset_all_endpoints(udc);
1883 spin_unlock_irqrestore(&udc->lock, flags);
1884
1885 /* This will also disable the DP pullup */
1886 usba_writel(udc, CTRL, 0);
1887
1888 driver->unbind(&udc->gadget);
1889 udc->gadget.dev.driver = NULL;
1890 udc->driver = NULL;
1891
1892 clk_disable(udc->hclk);
1893 clk_disable(udc->pclk);
1894
1895 DBG(DBG_GADGET, "unregistered driver `%s'\n", driver->driver.name);
1896
1897 return 0;
1898 }
1899 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1900
1901 static int __init usba_udc_probe(struct platform_device *pdev)
1902 {
1903 struct usba_platform_data *pdata = pdev->dev.platform_data;
1904 struct resource *regs, *fifo;
1905 struct clk *pclk, *hclk;
1906 struct usba_udc *udc = &the_udc;
1907 int irq, ret, i;
1908
1909 regs = platform_get_resource(pdev, IORESOURCE_MEM, CTRL_IOMEM_ID);
1910 fifo = platform_get_resource(pdev, IORESOURCE_MEM, FIFO_IOMEM_ID);
1911 if (!regs || !fifo)
1912 return -ENXIO;
1913
1914 irq = platform_get_irq(pdev, 0);
1915 if (irq < 0)
1916 return irq;
1917
1918 pclk = clk_get(&pdev->dev, "pclk");
1919 if (IS_ERR(pclk))
1920 return PTR_ERR(pclk);
1921 hclk = clk_get(&pdev->dev, "hclk");
1922 if (IS_ERR(hclk)) {
1923 ret = PTR_ERR(hclk);
1924 goto err_get_hclk;
1925 }
1926
1927 udc->pdev = pdev;
1928 udc->pclk = pclk;
1929 udc->hclk = hclk;
1930 udc->vbus_pin = -1;
1931
1932 ret = -ENOMEM;
1933 udc->regs = ioremap(regs->start, regs->end - regs->start + 1);
1934 if (!udc->regs) {
1935 dev_err(&pdev->dev, "Unable to map I/O memory, aborting.\n");
1936 goto err_map_regs;
1937 }
1938 dev_info(&pdev->dev, "MMIO registers at 0x%08lx mapped at %p\n",
1939 (unsigned long)regs->start, udc->regs);
1940 udc->fifo = ioremap(fifo->start, fifo->end - fifo->start + 1);
1941 if (!udc->fifo) {
1942 dev_err(&pdev->dev, "Unable to map FIFO, aborting.\n");
1943 goto err_map_fifo;
1944 }
1945 dev_info(&pdev->dev, "FIFO at 0x%08lx mapped at %p\n",
1946 (unsigned long)fifo->start, udc->fifo);
1947
1948 device_initialize(&udc->gadget.dev);
1949 udc->gadget.dev.parent = &pdev->dev;
1950 udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
1951
1952 platform_set_drvdata(pdev, udc);
1953
1954 /* Make sure we start from a clean slate */
1955 clk_enable(pclk);
1956 usba_writel(udc, CTRL, 0);
1957 clk_disable(pclk);
1958
1959 INIT_LIST_HEAD(&usba_ep[0].ep.ep_list);
1960 usba_ep[0].ep_regs = udc->regs + USBA_EPT_BASE(0);
1961 usba_ep[0].dma_regs = udc->regs + USBA_DMA_BASE(0);
1962 usba_ep[0].fifo = udc->fifo + USBA_FIFO_BASE(0);
1963 for (i = 1; i < ARRAY_SIZE(usba_ep); i++) {
1964 struct usba_ep *ep = &usba_ep[i];
1965
1966 ep->ep_regs = udc->regs + USBA_EPT_BASE(i);
1967 ep->dma_regs = udc->regs + USBA_DMA_BASE(i);
1968 ep->fifo = udc->fifo + USBA_FIFO_BASE(i);
1969
1970 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
1971 }
1972
1973 ret = request_irq(irq, usba_udc_irq, 0, "atmel_usba_udc", udc);
1974 if (ret) {
1975 dev_err(&pdev->dev, "Cannot request irq %d (error %d)\n",
1976 irq, ret);
1977 goto err_request_irq;
1978 }
1979 udc->irq = irq;
1980
1981 ret = device_add(&udc->gadget.dev);
1982 if (ret) {
1983 dev_dbg(&pdev->dev, "Could not add gadget: %d\n", ret);
1984 goto err_device_add;
1985 }
1986
1987 if (pdata && pdata->vbus_pin != GPIO_PIN_NONE) {
1988 if (!gpio_request(pdata->vbus_pin, "atmel_usba_udc")) {
1989 udc->vbus_pin = pdata->vbus_pin;
1990
1991 ret = request_irq(gpio_to_irq(udc->vbus_pin),
1992 usba_vbus_irq, 0,
1993 "atmel_usba_udc", udc);
1994 if (ret) {
1995 gpio_free(udc->vbus_pin);
1996 udc->vbus_pin = -1;
1997 dev_warn(&udc->pdev->dev,
1998 "failed to request vbus irq; "
1999 "assuming always on\n");
2000 } else {
2001 disable_irq(gpio_to_irq(udc->vbus_pin));
2002 }
2003 }
2004 }
2005
2006 usba_init_debugfs(udc);
2007 for (i = 1; i < ARRAY_SIZE(usba_ep); i++)
2008 usba_ep_init_debugfs(udc, &usba_ep[i]);
2009
2010 return 0;
2011
2012 err_device_add:
2013 free_irq(irq, udc);
2014 err_request_irq:
2015 iounmap(udc->fifo);
2016 err_map_fifo:
2017 iounmap(udc->regs);
2018 err_map_regs:
2019 clk_put(hclk);
2020 err_get_hclk:
2021 clk_put(pclk);
2022
2023 platform_set_drvdata(pdev, NULL);
2024
2025 return ret;
2026 }
2027
2028 static int __exit usba_udc_remove(struct platform_device *pdev)
2029 {
2030 struct usba_udc *udc;
2031 int i;
2032
2033 udc = platform_get_drvdata(pdev);
2034
2035 for (i = 1; i < ARRAY_SIZE(usba_ep); i++)
2036 usba_ep_cleanup_debugfs(&usba_ep[i]);
2037 usba_cleanup_debugfs(udc);
2038
2039 if (udc->vbus_pin != -1)
2040 gpio_free(udc->vbus_pin);
2041
2042 free_irq(udc->irq, udc);
2043 iounmap(udc->fifo);
2044 iounmap(udc->regs);
2045 clk_put(udc->hclk);
2046 clk_put(udc->pclk);
2047
2048 device_unregister(&udc->gadget.dev);
2049
2050 return 0;
2051 }
2052
2053 static struct platform_driver udc_driver = {
2054 .remove = __exit_p(usba_udc_remove),
2055 .driver = {
2056 .name = "atmel_usba_udc",
2057 .owner = THIS_MODULE,
2058 },
2059 };
2060
2061 static int __init udc_init(void)
2062 {
2063 return platform_driver_probe(&udc_driver, usba_udc_probe);
2064 }
2065 module_init(udc_init);
2066
2067 static void __exit udc_exit(void)
2068 {
2069 platform_driver_unregister(&udc_driver);
2070 }
2071 module_exit(udc_exit);
2072
2073 MODULE_DESCRIPTION("Atmel USBA UDC driver");
2074 MODULE_AUTHOR("Haavard Skinnemoen <hskinnemoen@atmel.com>");
2075 MODULE_LICENSE("GPL");
2076 MODULE_ALIAS("platform:atmel_usba_udc");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree