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USB: usb dev_name() instead of dev->bus_id
[deliverable/linux.git] / drivers / usb / gadget / lh7a40x_udc.c
1 /*
2 * linux/drivers/usb/gadget/lh7a40x_udc.c
3 * Sharp LH7A40x on-chip full speed USB device controllers
4 *
5 * Copyright (C) 2004 Mikko Lahteenmaki, Nordic ID
6 * Copyright (C) 2004 Bo Henriksen, Nordic ID
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24 #include <linux/platform_device.h>
25
26 #include "lh7a40x_udc.h"
27
28 //#define DEBUG printk
29 //#define DEBUG_EP0 printk
30 //#define DEBUG_SETUP printk
31
32 #ifndef DEBUG_EP0
33 # define DEBUG_EP0(fmt,args...)
34 #endif
35 #ifndef DEBUG_SETUP
36 # define DEBUG_SETUP(fmt,args...)
37 #endif
38 #ifndef DEBUG
39 # define NO_STATES
40 # define DEBUG(fmt,args...)
41 #endif
42
43 #define DRIVER_DESC "LH7A40x USB Device Controller"
44 #define DRIVER_VERSION __DATE__
45
46 #ifndef _BIT /* FIXME - what happended to _BIT in 2.6.7bk18? */
47 #define _BIT(x) (1<<(x))
48 #endif
49
50 struct lh7a40x_udc *the_controller;
51
52 static const char driver_name[] = "lh7a40x_udc";
53 static const char driver_desc[] = DRIVER_DESC;
54 static const char ep0name[] = "ep0-control";
55
56 /*
57 Local definintions.
58 */
59
60 #ifndef NO_STATES
61 static char *state_names[] = {
62 "WAIT_FOR_SETUP",
63 "DATA_STATE_XMIT",
64 "DATA_STATE_NEED_ZLP",
65 "WAIT_FOR_OUT_STATUS",
66 "DATA_STATE_RECV"
67 };
68 #endif
69
70 /*
71 Local declarations.
72 */
73 static int lh7a40x_ep_enable(struct usb_ep *ep,
74 const struct usb_endpoint_descriptor *);
75 static int lh7a40x_ep_disable(struct usb_ep *ep);
76 static struct usb_request *lh7a40x_alloc_request(struct usb_ep *ep, gfp_t);
77 static void lh7a40x_free_request(struct usb_ep *ep, struct usb_request *);
78 static int lh7a40x_queue(struct usb_ep *ep, struct usb_request *, gfp_t);
79 static int lh7a40x_dequeue(struct usb_ep *ep, struct usb_request *);
80 static int lh7a40x_set_halt(struct usb_ep *ep, int);
81 static int lh7a40x_fifo_status(struct usb_ep *ep);
82 static void lh7a40x_fifo_flush(struct usb_ep *ep);
83 static void lh7a40x_ep0_kick(struct lh7a40x_udc *dev, struct lh7a40x_ep *ep);
84 static void lh7a40x_handle_ep0(struct lh7a40x_udc *dev, u32 intr);
85
86 static void done(struct lh7a40x_ep *ep, struct lh7a40x_request *req,
87 int status);
88 static void pio_irq_enable(int bEndpointAddress);
89 static void pio_irq_disable(int bEndpointAddress);
90 static void stop_activity(struct lh7a40x_udc *dev,
91 struct usb_gadget_driver *driver);
92 static void flush(struct lh7a40x_ep *ep);
93 static void udc_enable(struct lh7a40x_udc *dev);
94 static void udc_set_address(struct lh7a40x_udc *dev, unsigned char address);
95
96 static struct usb_ep_ops lh7a40x_ep_ops = {
97 .enable = lh7a40x_ep_enable,
98 .disable = lh7a40x_ep_disable,
99
100 .alloc_request = lh7a40x_alloc_request,
101 .free_request = lh7a40x_free_request,
102
103 .queue = lh7a40x_queue,
104 .dequeue = lh7a40x_dequeue,
105
106 .set_halt = lh7a40x_set_halt,
107 .fifo_status = lh7a40x_fifo_status,
108 .fifo_flush = lh7a40x_fifo_flush,
109 };
110
111 /* Inline code */
112
113 static __inline__ int write_packet(struct lh7a40x_ep *ep,
114 struct lh7a40x_request *req, int max)
115 {
116 u8 *buf;
117 int length, count;
118 volatile u32 *fifo = (volatile u32 *)ep->fifo;
119
120 buf = req->req.buf + req->req.actual;
121 prefetch(buf);
122
123 length = req->req.length - req->req.actual;
124 length = min(length, max);
125 req->req.actual += length;
126
127 DEBUG("Write %d (max %d), fifo %p\n", length, max, fifo);
128
129 count = length;
130 while (count--) {
131 *fifo = *buf++;
132 }
133
134 return length;
135 }
136
137 static __inline__ void usb_set_index(u32 ep)
138 {
139 *(volatile u32 *)io_p2v(USB_INDEX) = ep;
140 }
141
142 static __inline__ u32 usb_read(u32 port)
143 {
144 return *(volatile u32 *)io_p2v(port);
145 }
146
147 static __inline__ void usb_write(u32 val, u32 port)
148 {
149 *(volatile u32 *)io_p2v(port) = val;
150 }
151
152 static __inline__ void usb_set(u32 val, u32 port)
153 {
154 volatile u32 *ioport = (volatile u32 *)io_p2v(port);
155 u32 after = (*ioport) | val;
156 *ioport = after;
157 }
158
159 static __inline__ void usb_clear(u32 val, u32 port)
160 {
161 volatile u32 *ioport = (volatile u32 *)io_p2v(port);
162 u32 after = (*ioport) & ~val;
163 *ioport = after;
164 }
165
166 /*-------------------------------------------------------------------------*/
167
168 #define GPIO_PORTC_DR (0x80000E08)
169 #define GPIO_PORTC_DDR (0x80000E18)
170 #define GPIO_PORTC_PDR (0x80000E70)
171
172 /* get port C pin data register */
173 #define get_portc_pdr(bit) ((usb_read(GPIO_PORTC_PDR) & _BIT(bit)) != 0)
174 /* get port C data direction register */
175 #define get_portc_ddr(bit) ((usb_read(GPIO_PORTC_DDR) & _BIT(bit)) != 0)
176 /* set port C data register */
177 #define set_portc_dr(bit, val) (val ? usb_set(_BIT(bit), GPIO_PORTC_DR) : usb_clear(_BIT(bit), GPIO_PORTC_DR))
178 /* set port C data direction register */
179 #define set_portc_ddr(bit, val) (val ? usb_set(_BIT(bit), GPIO_PORTC_DDR) : usb_clear(_BIT(bit), GPIO_PORTC_DDR))
180
181 /*
182 * LPD7A404 GPIO's:
183 * Port C bit 1 = USB Port 1 Power Enable
184 * Port C bit 2 = USB Port 1 Data Carrier Detect
185 */
186 #define is_usb_connected() get_portc_pdr(2)
187
188 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
189
190 static const char proc_node_name[] = "driver/udc";
191
192 static int
193 udc_proc_read(char *page, char **start, off_t off, int count,
194 int *eof, void *_dev)
195 {
196 char *buf = page;
197 struct lh7a40x_udc *dev = _dev;
198 char *next = buf;
199 unsigned size = count;
200 unsigned long flags;
201 int t;
202
203 if (off != 0)
204 return 0;
205
206 local_irq_save(flags);
207
208 /* basic device status */
209 t = scnprintf(next, size,
210 DRIVER_DESC "\n"
211 "%s version: %s\n"
212 "Gadget driver: %s\n"
213 "Host: %s\n\n",
214 driver_name, DRIVER_VERSION,
215 dev->driver ? dev->driver->driver.name : "(none)",
216 is_usb_connected()? "full speed" : "disconnected");
217 size -= t;
218 next += t;
219
220 t = scnprintf(next, size,
221 "GPIO:\n"
222 " Port C bit 1: %d, dir %d\n"
223 " Port C bit 2: %d, dir %d\n\n",
224 get_portc_pdr(1), get_portc_ddr(1),
225 get_portc_pdr(2), get_portc_ddr(2)
226 );
227 size -= t;
228 next += t;
229
230 t = scnprintf(next, size,
231 "DCP pullup: %d\n\n",
232 (usb_read(USB_PM) & PM_USB_DCP) != 0);
233 size -= t;
234 next += t;
235
236 local_irq_restore(flags);
237 *eof = 1;
238 return count - size;
239 }
240
241 #define create_proc_files() create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev)
242 #define remove_proc_files() remove_proc_entry(proc_node_name, NULL)
243
244 #else /* !CONFIG_USB_GADGET_DEBUG_FILES */
245
246 #define create_proc_files() do {} while (0)
247 #define remove_proc_files() do {} while (0)
248
249 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
250
251 /*
252 * udc_disable - disable USB device controller
253 */
254 static void udc_disable(struct lh7a40x_udc *dev)
255 {
256 DEBUG("%s, %p\n", __func__, dev);
257
258 udc_set_address(dev, 0);
259
260 /* Disable interrupts */
261 usb_write(0, USB_IN_INT_EN);
262 usb_write(0, USB_OUT_INT_EN);
263 usb_write(0, USB_INT_EN);
264
265 /* Disable the USB */
266 usb_write(0, USB_PM);
267
268 #ifdef CONFIG_ARCH_LH7A404
269 /* Disable USB power */
270 set_portc_dr(1, 0);
271 #endif
272
273 /* if hardware supports it, disconnect from usb */
274 /* make_usb_disappear(); */
275
276 dev->ep0state = WAIT_FOR_SETUP;
277 dev->gadget.speed = USB_SPEED_UNKNOWN;
278 dev->usb_address = 0;
279 }
280
281 /*
282 * udc_reinit - initialize software state
283 */
284 static void udc_reinit(struct lh7a40x_udc *dev)
285 {
286 u32 i;
287
288 DEBUG("%s, %p\n", __func__, dev);
289
290 /* device/ep0 records init */
291 INIT_LIST_HEAD(&dev->gadget.ep_list);
292 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
293 dev->ep0state = WAIT_FOR_SETUP;
294
295 /* basic endpoint records init */
296 for (i = 0; i < UDC_MAX_ENDPOINTS; i++) {
297 struct lh7a40x_ep *ep = &dev->ep[i];
298
299 if (i != 0)
300 list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
301
302 ep->desc = 0;
303 ep->stopped = 0;
304 INIT_LIST_HEAD(&ep->queue);
305 ep->pio_irqs = 0;
306 }
307
308 /* the rest was statically initialized, and is read-only */
309 }
310
311 #define BYTES2MAXP(x) (x / 8)
312 #define MAXP2BYTES(x) (x * 8)
313
314 /* until it's enabled, this UDC should be completely invisible
315 * to any USB host.
316 */
317 static void udc_enable(struct lh7a40x_udc *dev)
318 {
319 int ep;
320
321 DEBUG("%s, %p\n", __func__, dev);
322
323 dev->gadget.speed = USB_SPEED_UNKNOWN;
324
325 #ifdef CONFIG_ARCH_LH7A404
326 /* Set Port C bit 1 & 2 as output */
327 set_portc_ddr(1, 1);
328 set_portc_ddr(2, 1);
329
330 /* Enable USB power */
331 set_portc_dr(1, 0);
332 #endif
333
334 /*
335 * C.f Chapter 18.1.3.1 Initializing the USB
336 */
337
338 /* Disable the USB */
339 usb_clear(PM_USB_ENABLE, USB_PM);
340
341 /* Reset APB & I/O sides of the USB */
342 usb_set(USB_RESET_APB | USB_RESET_IO, USB_RESET);
343 mdelay(5);
344 usb_clear(USB_RESET_APB | USB_RESET_IO, USB_RESET);
345
346 /* Set MAXP values for each */
347 for (ep = 0; ep < UDC_MAX_ENDPOINTS; ep++) {
348 struct lh7a40x_ep *ep_reg = &dev->ep[ep];
349 u32 csr;
350
351 usb_set_index(ep);
352
353 switch (ep_reg->ep_type) {
354 case ep_bulk_in:
355 case ep_interrupt:
356 usb_clear(USB_IN_CSR2_USB_DMA_EN | USB_IN_CSR2_AUTO_SET,
357 ep_reg->csr2);
358 /* Fall through */
359 case ep_control:
360 usb_write(BYTES2MAXP(ep_maxpacket(ep_reg)),
361 USB_IN_MAXP);
362 break;
363 case ep_bulk_out:
364 usb_clear(USB_OUT_CSR2_USB_DMA_EN |
365 USB_OUT_CSR2_AUTO_CLR, ep_reg->csr2);
366 usb_write(BYTES2MAXP(ep_maxpacket(ep_reg)),
367 USB_OUT_MAXP);
368 break;
369 }
370
371 /* Read & Write CSR1, just in case */
372 csr = usb_read(ep_reg->csr1);
373 usb_write(csr, ep_reg->csr1);
374
375 flush(ep_reg);
376 }
377
378 /* Disable interrupts */
379 usb_write(0, USB_IN_INT_EN);
380 usb_write(0, USB_OUT_INT_EN);
381 usb_write(0, USB_INT_EN);
382
383 /* Enable interrupts */
384 usb_set(USB_IN_INT_EP0, USB_IN_INT_EN);
385 usb_set(USB_INT_RESET_INT | USB_INT_RESUME_INT, USB_INT_EN);
386 /* Dont enable rest of the interrupts */
387 /* usb_set(USB_IN_INT_EP3 | USB_IN_INT_EP1 | USB_IN_INT_EP0, USB_IN_INT_EN);
388 usb_set(USB_OUT_INT_EP2, USB_OUT_INT_EN); */
389
390 /* Enable SUSPEND */
391 usb_set(PM_ENABLE_SUSPEND, USB_PM);
392
393 /* Enable the USB */
394 usb_set(PM_USB_ENABLE, USB_PM);
395
396 #ifdef CONFIG_ARCH_LH7A404
397 /* NOTE: DOES NOT WORK! */
398 /* Let host detect UDC:
399 * Software must write a 0 to the PMR:DCP_CTRL bit to turn this
400 * transistor on and pull the USBDP pin HIGH.
401 */
402 /* usb_clear(PM_USB_DCP, USB_PM);
403 usb_set(PM_USB_DCP, USB_PM); */
404 #endif
405 }
406
407 /*
408 Register entry point for the peripheral controller driver.
409 */
410 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
411 {
412 struct lh7a40x_udc *dev = the_controller;
413 int retval;
414
415 DEBUG("%s: %s\n", __func__, driver->driver.name);
416
417 if (!driver
418 || driver->speed != USB_SPEED_FULL
419 || !driver->bind
420 || !driver->disconnect
421 || !driver->setup)
422 return -EINVAL;
423 if (!dev)
424 return -ENODEV;
425 if (dev->driver)
426 return -EBUSY;
427
428 /* first hook up the driver ... */
429 dev->driver = driver;
430 dev->gadget.dev.driver = &driver->driver;
431
432 device_add(&dev->gadget.dev);
433 retval = driver->bind(&dev->gadget);
434 if (retval) {
435 printk("%s: bind to driver %s --> error %d\n", dev->gadget.name,
436 driver->driver.name, retval);
437 device_del(&dev->gadget.dev);
438
439 dev->driver = 0;
440 dev->gadget.dev.driver = 0;
441 return retval;
442 }
443
444 /* ... then enable host detection and ep0; and we're ready
445 * for set_configuration as well as eventual disconnect.
446 * NOTE: this shouldn't power up until later.
447 */
448 printk("%s: registered gadget driver '%s'\n", dev->gadget.name,
449 driver->driver.name);
450
451 udc_enable(dev);
452
453 return 0;
454 }
455
456 EXPORT_SYMBOL(usb_gadget_register_driver);
457
458 /*
459 Unregister entry point for the peripheral controller driver.
460 */
461 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
462 {
463 struct lh7a40x_udc *dev = the_controller;
464 unsigned long flags;
465
466 if (!dev)
467 return -ENODEV;
468 if (!driver || driver != dev->driver || !driver->unbind)
469 return -EINVAL;
470
471 spin_lock_irqsave(&dev->lock, flags);
472 dev->driver = 0;
473 stop_activity(dev, driver);
474 spin_unlock_irqrestore(&dev->lock, flags);
475
476 driver->unbind(&dev->gadget);
477 dev->gadget.dev.driver = NULL;
478 device_del(&dev->gadget.dev);
479
480 udc_disable(dev);
481
482 DEBUG("unregistered gadget driver '%s'\n", driver->driver.name);
483 return 0;
484 }
485
486 EXPORT_SYMBOL(usb_gadget_unregister_driver);
487
488 /*-------------------------------------------------------------------------*/
489
490 /** Write request to FIFO (max write == maxp size)
491 * Return: 0 = still running, 1 = completed, negative = errno
492 * NOTE: INDEX register must be set for EP
493 */
494 static int write_fifo(struct lh7a40x_ep *ep, struct lh7a40x_request *req)
495 {
496 u32 max;
497 u32 csr;
498
499 max = le16_to_cpu(ep->desc->wMaxPacketSize);
500
501 csr = usb_read(ep->csr1);
502 DEBUG("CSR: %x %d\n", csr, csr & USB_IN_CSR1_FIFO_NOT_EMPTY);
503
504 if (!(csr & USB_IN_CSR1_FIFO_NOT_EMPTY)) {
505 unsigned count;
506 int is_last, is_short;
507
508 count = write_packet(ep, req, max);
509 usb_set(USB_IN_CSR1_IN_PKT_RDY, ep->csr1);
510
511 /* last packet is usually short (or a zlp) */
512 if (unlikely(count != max))
513 is_last = is_short = 1;
514 else {
515 if (likely(req->req.length != req->req.actual)
516 || req->req.zero)
517 is_last = 0;
518 else
519 is_last = 1;
520 /* interrupt/iso maxpacket may not fill the fifo */
521 is_short = unlikely(max < ep_maxpacket(ep));
522 }
523
524 DEBUG("%s: wrote %s %d bytes%s%s %d left %p\n", __func__,
525 ep->ep.name, count,
526 is_last ? "/L" : "", is_short ? "/S" : "",
527 req->req.length - req->req.actual, req);
528
529 /* requests complete when all IN data is in the FIFO */
530 if (is_last) {
531 done(ep, req, 0);
532 if (list_empty(&ep->queue)) {
533 pio_irq_disable(ep_index(ep));
534 }
535 return 1;
536 }
537 } else {
538 DEBUG("Hmm.. %d ep FIFO is not empty!\n", ep_index(ep));
539 }
540
541 return 0;
542 }
543
544 /** Read to request from FIFO (max read == bytes in fifo)
545 * Return: 0 = still running, 1 = completed, negative = errno
546 * NOTE: INDEX register must be set for EP
547 */
548 static int read_fifo(struct lh7a40x_ep *ep, struct lh7a40x_request *req)
549 {
550 u32 csr;
551 u8 *buf;
552 unsigned bufferspace, count, is_short;
553 volatile u32 *fifo = (volatile u32 *)ep->fifo;
554
555 /* make sure there's a packet in the FIFO. */
556 csr = usb_read(ep->csr1);
557 if (!(csr & USB_OUT_CSR1_OUT_PKT_RDY)) {
558 DEBUG("%s: Packet NOT ready!\n", __func__);
559 return -EINVAL;
560 }
561
562 buf = req->req.buf + req->req.actual;
563 prefetchw(buf);
564 bufferspace = req->req.length - req->req.actual;
565
566 /* read all bytes from this packet */
567 count = usb_read(USB_OUT_FIFO_WC1);
568 req->req.actual += min(count, bufferspace);
569
570 is_short = (count < ep->ep.maxpacket);
571 DEBUG("read %s %02x, %d bytes%s req %p %d/%d\n",
572 ep->ep.name, csr, count,
573 is_short ? "/S" : "", req, req->req.actual, req->req.length);
574
575 while (likely(count-- != 0)) {
576 u8 byte = (u8) (*fifo & 0xff);
577
578 if (unlikely(bufferspace == 0)) {
579 /* this happens when the driver's buffer
580 * is smaller than what the host sent.
581 * discard the extra data.
582 */
583 if (req->req.status != -EOVERFLOW)
584 printk("%s overflow %d\n", ep->ep.name, count);
585 req->req.status = -EOVERFLOW;
586 } else {
587 *buf++ = byte;
588 bufferspace--;
589 }
590 }
591
592 usb_clear(USB_OUT_CSR1_OUT_PKT_RDY, ep->csr1);
593
594 /* completion */
595 if (is_short || req->req.actual == req->req.length) {
596 done(ep, req, 0);
597 usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1);
598
599 if (list_empty(&ep->queue))
600 pio_irq_disable(ep_index(ep));
601 return 1;
602 }
603
604 /* finished that packet. the next one may be waiting... */
605 return 0;
606 }
607
608 /*
609 * done - retire a request; caller blocked irqs
610 * INDEX register is preserved to keep same
611 */
612 static void done(struct lh7a40x_ep *ep, struct lh7a40x_request *req, int status)
613 {
614 unsigned int stopped = ep->stopped;
615 u32 index;
616
617 DEBUG("%s, %p\n", __func__, ep);
618 list_del_init(&req->queue);
619
620 if (likely(req->req.status == -EINPROGRESS))
621 req->req.status = status;
622 else
623 status = req->req.status;
624
625 if (status && status != -ESHUTDOWN)
626 DEBUG("complete %s req %p stat %d len %u/%u\n",
627 ep->ep.name, &req->req, status,
628 req->req.actual, req->req.length);
629
630 /* don't modify queue heads during completion callback */
631 ep->stopped = 1;
632 /* Read current index (completion may modify it) */
633 index = usb_read(USB_INDEX);
634
635 spin_unlock(&ep->dev->lock);
636 req->req.complete(&ep->ep, &req->req);
637 spin_lock(&ep->dev->lock);
638
639 /* Restore index */
640 usb_set_index(index);
641 ep->stopped = stopped;
642 }
643
644 /** Enable EP interrupt */
645 static void pio_irq_enable(int ep)
646 {
647 DEBUG("%s: %d\n", __func__, ep);
648
649 switch (ep) {
650 case 1:
651 usb_set(USB_IN_INT_EP1, USB_IN_INT_EN);
652 break;
653 case 2:
654 usb_set(USB_OUT_INT_EP2, USB_OUT_INT_EN);
655 break;
656 case 3:
657 usb_set(USB_IN_INT_EP3, USB_IN_INT_EN);
658 break;
659 default:
660 DEBUG("Unknown endpoint: %d\n", ep);
661 break;
662 }
663 }
664
665 /** Disable EP interrupt */
666 static void pio_irq_disable(int ep)
667 {
668 DEBUG("%s: %d\n", __func__, ep);
669
670 switch (ep) {
671 case 1:
672 usb_clear(USB_IN_INT_EP1, USB_IN_INT_EN);
673 break;
674 case 2:
675 usb_clear(USB_OUT_INT_EP2, USB_OUT_INT_EN);
676 break;
677 case 3:
678 usb_clear(USB_IN_INT_EP3, USB_IN_INT_EN);
679 break;
680 default:
681 DEBUG("Unknown endpoint: %d\n", ep);
682 break;
683 }
684 }
685
686 /*
687 * nuke - dequeue ALL requests
688 */
689 void nuke(struct lh7a40x_ep *ep, int status)
690 {
691 struct lh7a40x_request *req;
692
693 DEBUG("%s, %p\n", __func__, ep);
694
695 /* Flush FIFO */
696 flush(ep);
697
698 /* called with irqs blocked */
699 while (!list_empty(&ep->queue)) {
700 req = list_entry(ep->queue.next, struct lh7a40x_request, queue);
701 done(ep, req, status);
702 }
703
704 /* Disable IRQ if EP is enabled (has descriptor) */
705 if (ep->desc)
706 pio_irq_disable(ep_index(ep));
707 }
708
709 /*
710 void nuke_all(struct lh7a40x_udc *dev)
711 {
712 int n;
713 for(n=0; n<UDC_MAX_ENDPOINTS; n++) {
714 struct lh7a40x_ep *ep = &dev->ep[n];
715 usb_set_index(n);
716 nuke(ep, 0);
717 }
718 }*/
719
720 /*
721 static void flush_all(struct lh7a40x_udc *dev)
722 {
723 int n;
724 for (n = 0; n < UDC_MAX_ENDPOINTS; n++)
725 {
726 struct lh7a40x_ep *ep = &dev->ep[n];
727 flush(ep);
728 }
729 }
730 */
731
732 /** Flush EP
733 * NOTE: INDEX register must be set before this call
734 */
735 static void flush(struct lh7a40x_ep *ep)
736 {
737 DEBUG("%s, %p\n", __func__, ep);
738
739 switch (ep->ep_type) {
740 case ep_control:
741 /* check, by implication c.f. 15.1.2.11 */
742 break;
743
744 case ep_bulk_in:
745 case ep_interrupt:
746 /* if(csr & USB_IN_CSR1_IN_PKT_RDY) */
747 usb_set(USB_IN_CSR1_FIFO_FLUSH, ep->csr1);
748 break;
749
750 case ep_bulk_out:
751 /* if(csr & USB_OUT_CSR1_OUT_PKT_RDY) */
752 usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1);
753 break;
754 }
755 }
756
757 /**
758 * lh7a40x_in_epn - handle IN interrupt
759 */
760 static void lh7a40x_in_epn(struct lh7a40x_udc *dev, u32 ep_idx, u32 intr)
761 {
762 u32 csr;
763 struct lh7a40x_ep *ep = &dev->ep[ep_idx];
764 struct lh7a40x_request *req;
765
766 usb_set_index(ep_idx);
767
768 csr = usb_read(ep->csr1);
769 DEBUG("%s: %d, csr %x\n", __func__, ep_idx, csr);
770
771 if (csr & USB_IN_CSR1_SENT_STALL) {
772 DEBUG("USB_IN_CSR1_SENT_STALL\n");
773 usb_set(USB_IN_CSR1_SENT_STALL /*|USB_IN_CSR1_SEND_STALL */ ,
774 ep->csr1);
775 return;
776 }
777
778 if (!ep->desc) {
779 DEBUG("%s: NO EP DESC\n", __func__);
780 return;
781 }
782
783 if (list_empty(&ep->queue))
784 req = 0;
785 else
786 req = list_entry(ep->queue.next, struct lh7a40x_request, queue);
787
788 DEBUG("req: %p\n", req);
789
790 if (!req)
791 return;
792
793 write_fifo(ep, req);
794 }
795
796 /* ********************************************************************************************* */
797 /* Bulk OUT (recv)
798 */
799
800 static void lh7a40x_out_epn(struct lh7a40x_udc *dev, u32 ep_idx, u32 intr)
801 {
802 struct lh7a40x_ep *ep = &dev->ep[ep_idx];
803 struct lh7a40x_request *req;
804
805 DEBUG("%s: %d\n", __func__, ep_idx);
806
807 usb_set_index(ep_idx);
808
809 if (ep->desc) {
810 u32 csr;
811 csr = usb_read(ep->csr1);
812
813 while ((csr =
814 usb_read(ep->
815 csr1)) & (USB_OUT_CSR1_OUT_PKT_RDY |
816 USB_OUT_CSR1_SENT_STALL)) {
817 DEBUG("%s: %x\n", __func__, csr);
818
819 if (csr & USB_OUT_CSR1_SENT_STALL) {
820 DEBUG("%s: stall sent, flush fifo\n",
821 __func__);
822 /* usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1); */
823 flush(ep);
824 } else if (csr & USB_OUT_CSR1_OUT_PKT_RDY) {
825 if (list_empty(&ep->queue))
826 req = 0;
827 else
828 req =
829 list_entry(ep->queue.next,
830 struct lh7a40x_request,
831 queue);
832
833 if (!req) {
834 printk("%s: NULL REQ %d\n",
835 __func__, ep_idx);
836 flush(ep);
837 break;
838 } else {
839 read_fifo(ep, req);
840 }
841 }
842
843 }
844
845 } else {
846 /* Throw packet away.. */
847 printk("%s: No descriptor?!?\n", __func__);
848 flush(ep);
849 }
850 }
851
852 static void stop_activity(struct lh7a40x_udc *dev,
853 struct usb_gadget_driver *driver)
854 {
855 int i;
856
857 /* don't disconnect drivers more than once */
858 if (dev->gadget.speed == USB_SPEED_UNKNOWN)
859 driver = 0;
860 dev->gadget.speed = USB_SPEED_UNKNOWN;
861
862 /* prevent new request submissions, kill any outstanding requests */
863 for (i = 0; i < UDC_MAX_ENDPOINTS; i++) {
864 struct lh7a40x_ep *ep = &dev->ep[i];
865 ep->stopped = 1;
866
867 usb_set_index(i);
868 nuke(ep, -ESHUTDOWN);
869 }
870
871 /* report disconnect; the driver is already quiesced */
872 if (driver) {
873 spin_unlock(&dev->lock);
874 driver->disconnect(&dev->gadget);
875 spin_lock(&dev->lock);
876 }
877
878 /* re-init driver-visible data structures */
879 udc_reinit(dev);
880 }
881
882 /** Handle USB RESET interrupt
883 */
884 static void lh7a40x_reset_intr(struct lh7a40x_udc *dev)
885 {
886 #if 0 /* def CONFIG_ARCH_LH7A404 */
887 /* Does not work always... */
888
889 DEBUG("%s: %d\n", __func__, dev->usb_address);
890
891 if (!dev->usb_address) {
892 /*usb_set(USB_RESET_IO, USB_RESET);
893 mdelay(5);
894 usb_clear(USB_RESET_IO, USB_RESET); */
895 return;
896 }
897 /* Put the USB controller into reset. */
898 usb_set(USB_RESET_IO, USB_RESET);
899
900 /* Set Device ID to 0 */
901 udc_set_address(dev, 0);
902
903 /* Let PLL2 settle down */
904 mdelay(5);
905
906 /* Release the USB controller from reset */
907 usb_clear(USB_RESET_IO, USB_RESET);
908
909 /* Re-enable UDC */
910 udc_enable(dev);
911
912 #endif
913 dev->gadget.speed = USB_SPEED_FULL;
914 }
915
916 /*
917 * lh7a40x usb client interrupt handler.
918 */
919 static irqreturn_t lh7a40x_udc_irq(int irq, void *_dev)
920 {
921 struct lh7a40x_udc *dev = _dev;
922
923 DEBUG("\n\n");
924
925 spin_lock(&dev->lock);
926
927 for (;;) {
928 u32 intr_in = usb_read(USB_IN_INT);
929 u32 intr_out = usb_read(USB_OUT_INT);
930 u32 intr_int = usb_read(USB_INT);
931
932 /* Test also against enable bits.. (lh7a40x errata).. Sigh.. */
933 u32 in_en = usb_read(USB_IN_INT_EN);
934 u32 out_en = usb_read(USB_OUT_INT_EN);
935
936 if (!intr_out && !intr_in && !intr_int)
937 break;
938
939 DEBUG("%s (on state %s)\n", __func__,
940 state_names[dev->ep0state]);
941 DEBUG("intr_out = %x\n", intr_out);
942 DEBUG("intr_in = %x\n", intr_in);
943 DEBUG("intr_int = %x\n", intr_int);
944
945 if (intr_in) {
946 usb_write(intr_in, USB_IN_INT);
947
948 if ((intr_in & USB_IN_INT_EP1)
949 && (in_en & USB_IN_INT_EP1)) {
950 DEBUG("USB_IN_INT_EP1\n");
951 lh7a40x_in_epn(dev, 1, intr_in);
952 }
953 if ((intr_in & USB_IN_INT_EP3)
954 && (in_en & USB_IN_INT_EP3)) {
955 DEBUG("USB_IN_INT_EP3\n");
956 lh7a40x_in_epn(dev, 3, intr_in);
957 }
958 if (intr_in & USB_IN_INT_EP0) {
959 DEBUG("USB_IN_INT_EP0 (control)\n");
960 lh7a40x_handle_ep0(dev, intr_in);
961 }
962 }
963
964 if (intr_out) {
965 usb_write(intr_out, USB_OUT_INT);
966
967 if ((intr_out & USB_OUT_INT_EP2)
968 && (out_en & USB_OUT_INT_EP2)) {
969 DEBUG("USB_OUT_INT_EP2\n");
970 lh7a40x_out_epn(dev, 2, intr_out);
971 }
972 }
973
974 if (intr_int) {
975 usb_write(intr_int, USB_INT);
976
977 if (intr_int & USB_INT_RESET_INT) {
978 lh7a40x_reset_intr(dev);
979 }
980
981 if (intr_int & USB_INT_RESUME_INT) {
982 DEBUG("USB resume\n");
983
984 if (dev->gadget.speed != USB_SPEED_UNKNOWN
985 && dev->driver
986 && dev->driver->resume
987 && is_usb_connected()) {
988 dev->driver->resume(&dev->gadget);
989 }
990 }
991
992 if (intr_int & USB_INT_SUSPEND_INT) {
993 DEBUG("USB suspend%s\n",
994 is_usb_connected()? "" : "+disconnect");
995 if (!is_usb_connected()) {
996 stop_activity(dev, dev->driver);
997 } else if (dev->gadget.speed !=
998 USB_SPEED_UNKNOWN && dev->driver
999 && dev->driver->suspend) {
1000 dev->driver->suspend(&dev->gadget);
1001 }
1002 }
1003
1004 }
1005 }
1006
1007 spin_unlock(&dev->lock);
1008
1009 return IRQ_HANDLED;
1010 }
1011
1012 static int lh7a40x_ep_enable(struct usb_ep *_ep,
1013 const struct usb_endpoint_descriptor *desc)
1014 {
1015 struct lh7a40x_ep *ep;
1016 struct lh7a40x_udc *dev;
1017 unsigned long flags;
1018
1019 DEBUG("%s, %p\n", __func__, _ep);
1020
1021 ep = container_of(_ep, struct lh7a40x_ep, ep);
1022 if (!_ep || !desc || ep->desc || _ep->name == ep0name
1023 || desc->bDescriptorType != USB_DT_ENDPOINT
1024 || ep->bEndpointAddress != desc->bEndpointAddress
1025 || ep_maxpacket(ep) < le16_to_cpu(desc->wMaxPacketSize)) {
1026 DEBUG("%s, bad ep or descriptor\n", __func__);
1027 return -EINVAL;
1028 }
1029
1030 /* xfer types must match, except that interrupt ~= bulk */
1031 if (ep->bmAttributes != desc->bmAttributes
1032 && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
1033 && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
1034 DEBUG("%s, %s type mismatch\n", __func__, _ep->name);
1035 return -EINVAL;
1036 }
1037
1038 /* hardware _could_ do smaller, but driver doesn't */
1039 if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
1040 && le16_to_cpu(desc->wMaxPacketSize) != ep_maxpacket(ep))
1041 || !desc->wMaxPacketSize) {
1042 DEBUG("%s, bad %s maxpacket\n", __func__, _ep->name);
1043 return -ERANGE;
1044 }
1045
1046 dev = ep->dev;
1047 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
1048 DEBUG("%s, bogus device state\n", __func__);
1049 return -ESHUTDOWN;
1050 }
1051
1052 spin_lock_irqsave(&ep->dev->lock, flags);
1053
1054 ep->stopped = 0;
1055 ep->desc = desc;
1056 ep->pio_irqs = 0;
1057 ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
1058
1059 spin_unlock_irqrestore(&ep->dev->lock, flags);
1060
1061 /* Reset halt state (does flush) */
1062 lh7a40x_set_halt(_ep, 0);
1063
1064 DEBUG("%s: enabled %s\n", __func__, _ep->name);
1065 return 0;
1066 }
1067
1068 /** Disable EP
1069 * NOTE: Sets INDEX register
1070 */
1071 static int lh7a40x_ep_disable(struct usb_ep *_ep)
1072 {
1073 struct lh7a40x_ep *ep;
1074 unsigned long flags;
1075
1076 DEBUG("%s, %p\n", __func__, _ep);
1077
1078 ep = container_of(_ep, struct lh7a40x_ep, ep);
1079 if (!_ep || !ep->desc) {
1080 DEBUG("%s, %s not enabled\n", __func__,
1081 _ep ? ep->ep.name : NULL);
1082 return -EINVAL;
1083 }
1084
1085 spin_lock_irqsave(&ep->dev->lock, flags);
1086
1087 usb_set_index(ep_index(ep));
1088
1089 /* Nuke all pending requests (does flush) */
1090 nuke(ep, -ESHUTDOWN);
1091
1092 /* Disable ep IRQ */
1093 pio_irq_disable(ep_index(ep));
1094
1095 ep->desc = 0;
1096 ep->stopped = 1;
1097
1098 spin_unlock_irqrestore(&ep->dev->lock, flags);
1099
1100 DEBUG("%s: disabled %s\n", __func__, _ep->name);
1101 return 0;
1102 }
1103
1104 static struct usb_request *lh7a40x_alloc_request(struct usb_ep *ep,
1105 gfp_t gfp_flags)
1106 {
1107 struct lh7a40x_request *req;
1108
1109 DEBUG("%s, %p\n", __func__, ep);
1110
1111 req = kzalloc(sizeof(*req), gfp_flags);
1112 if (!req)
1113 return 0;
1114
1115 INIT_LIST_HEAD(&req->queue);
1116
1117 return &req->req;
1118 }
1119
1120 static void lh7a40x_free_request(struct usb_ep *ep, struct usb_request *_req)
1121 {
1122 struct lh7a40x_request *req;
1123
1124 DEBUG("%s, %p\n", __func__, ep);
1125
1126 req = container_of(_req, struct lh7a40x_request, req);
1127 WARN_ON(!list_empty(&req->queue));
1128 kfree(req);
1129 }
1130
1131 /** Queue one request
1132 * Kickstart transfer if needed
1133 * NOTE: Sets INDEX register
1134 */
1135 static int lh7a40x_queue(struct usb_ep *_ep, struct usb_request *_req,
1136 gfp_t gfp_flags)
1137 {
1138 struct lh7a40x_request *req;
1139 struct lh7a40x_ep *ep;
1140 struct lh7a40x_udc *dev;
1141 unsigned long flags;
1142
1143 DEBUG("\n\n\n%s, %p\n", __func__, _ep);
1144
1145 req = container_of(_req, struct lh7a40x_request, req);
1146 if (unlikely
1147 (!_req || !_req->complete || !_req->buf
1148 || !list_empty(&req->queue))) {
1149 DEBUG("%s, bad params\n", __func__);
1150 return -EINVAL;
1151 }
1152
1153 ep = container_of(_ep, struct lh7a40x_ep, ep);
1154 if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1155 DEBUG("%s, bad ep\n", __func__);
1156 return -EINVAL;
1157 }
1158
1159 dev = ep->dev;
1160 if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1161 DEBUG("%s, bogus device state %p\n", __func__, dev->driver);
1162 return -ESHUTDOWN;
1163 }
1164
1165 DEBUG("%s queue req %p, len %d buf %p\n", _ep->name, _req, _req->length,
1166 _req->buf);
1167
1168 spin_lock_irqsave(&dev->lock, flags);
1169
1170 _req->status = -EINPROGRESS;
1171 _req->actual = 0;
1172
1173 /* kickstart this i/o queue? */
1174 DEBUG("Add to %d Q %d %d\n", ep_index(ep), list_empty(&ep->queue),
1175 ep->stopped);
1176 if (list_empty(&ep->queue) && likely(!ep->stopped)) {
1177 u32 csr;
1178
1179 if (unlikely(ep_index(ep) == 0)) {
1180 /* EP0 */
1181 list_add_tail(&req->queue, &ep->queue);
1182 lh7a40x_ep0_kick(dev, ep);
1183 req = 0;
1184 } else if (ep_is_in(ep)) {
1185 /* EP1 & EP3 */
1186 usb_set_index(ep_index(ep));
1187 csr = usb_read(ep->csr1);
1188 pio_irq_enable(ep_index(ep));
1189 if ((csr & USB_IN_CSR1_FIFO_NOT_EMPTY) == 0) {
1190 if (write_fifo(ep, req) == 1)
1191 req = 0;
1192 }
1193 } else {
1194 /* EP2 */
1195 usb_set_index(ep_index(ep));
1196 csr = usb_read(ep->csr1);
1197 pio_irq_enable(ep_index(ep));
1198 if (!(csr & USB_OUT_CSR1_FIFO_FULL)) {
1199 if (read_fifo(ep, req) == 1)
1200 req = 0;
1201 }
1202 }
1203 }
1204
1205 /* pio or dma irq handler advances the queue. */
1206 if (likely(req != 0))
1207 list_add_tail(&req->queue, &ep->queue);
1208
1209 spin_unlock_irqrestore(&dev->lock, flags);
1210
1211 return 0;
1212 }
1213
1214 /* dequeue JUST ONE request */
1215 static int lh7a40x_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1216 {
1217 struct lh7a40x_ep *ep;
1218 struct lh7a40x_request *req;
1219 unsigned long flags;
1220
1221 DEBUG("%s, %p\n", __func__, _ep);
1222
1223 ep = container_of(_ep, struct lh7a40x_ep, ep);
1224 if (!_ep || ep->ep.name == ep0name)
1225 return -EINVAL;
1226
1227 spin_lock_irqsave(&ep->dev->lock, flags);
1228
1229 /* make sure it's actually queued on this endpoint */
1230 list_for_each_entry(req, &ep->queue, queue) {
1231 if (&req->req == _req)
1232 break;
1233 }
1234 if (&req->req != _req) {
1235 spin_unlock_irqrestore(&ep->dev->lock, flags);
1236 return -EINVAL;
1237 }
1238
1239 done(ep, req, -ECONNRESET);
1240
1241 spin_unlock_irqrestore(&ep->dev->lock, flags);
1242 return 0;
1243 }
1244
1245 /** Halt specific EP
1246 * Return 0 if success
1247 * NOTE: Sets INDEX register to EP !
1248 */
1249 static int lh7a40x_set_halt(struct usb_ep *_ep, int value)
1250 {
1251 struct lh7a40x_ep *ep;
1252 unsigned long flags;
1253
1254 ep = container_of(_ep, struct lh7a40x_ep, ep);
1255 if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1256 DEBUG("%s, bad ep\n", __func__);
1257 return -EINVAL;
1258 }
1259
1260 usb_set_index(ep_index(ep));
1261
1262 DEBUG("%s, ep %d, val %d\n", __func__, ep_index(ep), value);
1263
1264 spin_lock_irqsave(&ep->dev->lock, flags);
1265
1266 if (ep_index(ep) == 0) {
1267 /* EP0 */
1268 usb_set(EP0_SEND_STALL, ep->csr1);
1269 } else if (ep_is_in(ep)) {
1270 u32 csr = usb_read(ep->csr1);
1271 if (value && ((csr & USB_IN_CSR1_FIFO_NOT_EMPTY)
1272 || !list_empty(&ep->queue))) {
1273 /*
1274 * Attempts to halt IN endpoints will fail (returning -EAGAIN)
1275 * if any transfer requests are still queued, or if the controller
1276 * FIFO still holds bytes that the host hasn't collected.
1277 */
1278 spin_unlock_irqrestore(&ep->dev->lock, flags);
1279 DEBUG
1280 ("Attempt to halt IN endpoint failed (returning -EAGAIN) %d %d\n",
1281 (csr & USB_IN_CSR1_FIFO_NOT_EMPTY),
1282 !list_empty(&ep->queue));
1283 return -EAGAIN;
1284 }
1285 flush(ep);
1286 if (value)
1287 usb_set(USB_IN_CSR1_SEND_STALL, ep->csr1);
1288 else {
1289 usb_clear(USB_IN_CSR1_SEND_STALL, ep->csr1);
1290 usb_set(USB_IN_CSR1_CLR_DATA_TOGGLE, ep->csr1);
1291 }
1292
1293 } else {
1294
1295 flush(ep);
1296 if (value)
1297 usb_set(USB_OUT_CSR1_SEND_STALL, ep->csr1);
1298 else {
1299 usb_clear(USB_OUT_CSR1_SEND_STALL, ep->csr1);
1300 usb_set(USB_OUT_CSR1_CLR_DATA_REG, ep->csr1);
1301 }
1302 }
1303
1304 if (value) {
1305 ep->stopped = 1;
1306 } else {
1307 ep->stopped = 0;
1308 }
1309
1310 spin_unlock_irqrestore(&ep->dev->lock, flags);
1311
1312 DEBUG("%s %s halted\n", _ep->name, value == 0 ? "NOT" : "IS");
1313
1314 return 0;
1315 }
1316
1317 /** Return bytes in EP FIFO
1318 * NOTE: Sets INDEX register to EP
1319 */
1320 static int lh7a40x_fifo_status(struct usb_ep *_ep)
1321 {
1322 u32 csr;
1323 int count = 0;
1324 struct lh7a40x_ep *ep;
1325
1326 ep = container_of(_ep, struct lh7a40x_ep, ep);
1327 if (!_ep) {
1328 DEBUG("%s, bad ep\n", __func__);
1329 return -ENODEV;
1330 }
1331
1332 DEBUG("%s, %d\n", __func__, ep_index(ep));
1333
1334 /* LPD can't report unclaimed bytes from IN fifos */
1335 if (ep_is_in(ep))
1336 return -EOPNOTSUPP;
1337
1338 usb_set_index(ep_index(ep));
1339
1340 csr = usb_read(ep->csr1);
1341 if (ep->dev->gadget.speed != USB_SPEED_UNKNOWN ||
1342 csr & USB_OUT_CSR1_OUT_PKT_RDY) {
1343 count = usb_read(USB_OUT_FIFO_WC1);
1344 }
1345
1346 return count;
1347 }
1348
1349 /** Flush EP FIFO
1350 * NOTE: Sets INDEX register to EP
1351 */
1352 static void lh7a40x_fifo_flush(struct usb_ep *_ep)
1353 {
1354 struct lh7a40x_ep *ep;
1355
1356 ep = container_of(_ep, struct lh7a40x_ep, ep);
1357 if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1358 DEBUG("%s, bad ep\n", __func__);
1359 return;
1360 }
1361
1362 usb_set_index(ep_index(ep));
1363 flush(ep);
1364 }
1365
1366 /****************************************************************/
1367 /* End Point 0 related functions */
1368 /****************************************************************/
1369
1370 /* return: 0 = still running, 1 = completed, negative = errno */
1371 static int write_fifo_ep0(struct lh7a40x_ep *ep, struct lh7a40x_request *req)
1372 {
1373 u32 max;
1374 unsigned count;
1375 int is_last;
1376
1377 max = ep_maxpacket(ep);
1378
1379 DEBUG_EP0("%s\n", __func__);
1380
1381 count = write_packet(ep, req, max);
1382
1383 /* last packet is usually short (or a zlp) */
1384 if (unlikely(count != max))
1385 is_last = 1;
1386 else {
1387 if (likely(req->req.length != req->req.actual) || req->req.zero)
1388 is_last = 0;
1389 else
1390 is_last = 1;
1391 }
1392
1393 DEBUG_EP0("%s: wrote %s %d bytes%s %d left %p\n", __func__,
1394 ep->ep.name, count,
1395 is_last ? "/L" : "", req->req.length - req->req.actual, req);
1396
1397 /* requests complete when all IN data is in the FIFO */
1398 if (is_last) {
1399 done(ep, req, 0);
1400 return 1;
1401 }
1402
1403 return 0;
1404 }
1405
1406 static __inline__ int lh7a40x_fifo_read(struct lh7a40x_ep *ep,
1407 unsigned char *cp, int max)
1408 {
1409 int bytes;
1410 int count = usb_read(USB_OUT_FIFO_WC1);
1411 volatile u32 *fifo = (volatile u32 *)ep->fifo;
1412
1413 if (count > max)
1414 count = max;
1415 bytes = count;
1416 while (count--)
1417 *cp++ = *fifo & 0xFF;
1418 return bytes;
1419 }
1420
1421 static __inline__ void lh7a40x_fifo_write(struct lh7a40x_ep *ep,
1422 unsigned char *cp, int count)
1423 {
1424 volatile u32 *fifo = (volatile u32 *)ep->fifo;
1425 DEBUG_EP0("fifo_write: %d %d\n", ep_index(ep), count);
1426 while (count--)
1427 *fifo = *cp++;
1428 }
1429
1430 static int read_fifo_ep0(struct lh7a40x_ep *ep, struct lh7a40x_request *req)
1431 {
1432 u32 csr;
1433 u8 *buf;
1434 unsigned bufferspace, count, is_short;
1435 volatile u32 *fifo = (volatile u32 *)ep->fifo;
1436
1437 DEBUG_EP0("%s\n", __func__);
1438
1439 csr = usb_read(USB_EP0_CSR);
1440 if (!(csr & USB_OUT_CSR1_OUT_PKT_RDY))
1441 return 0;
1442
1443 buf = req->req.buf + req->req.actual;
1444 prefetchw(buf);
1445 bufferspace = req->req.length - req->req.actual;
1446
1447 /* read all bytes from this packet */
1448 if (likely(csr & EP0_OUT_PKT_RDY)) {
1449 count = usb_read(USB_OUT_FIFO_WC1);
1450 req->req.actual += min(count, bufferspace);
1451 } else /* zlp */
1452 count = 0;
1453
1454 is_short = (count < ep->ep.maxpacket);
1455 DEBUG_EP0("read %s %02x, %d bytes%s req %p %d/%d\n",
1456 ep->ep.name, csr, count,
1457 is_short ? "/S" : "", req, req->req.actual, req->req.length);
1458
1459 while (likely(count-- != 0)) {
1460 u8 byte = (u8) (*fifo & 0xff);
1461
1462 if (unlikely(bufferspace == 0)) {
1463 /* this happens when the driver's buffer
1464 * is smaller than what the host sent.
1465 * discard the extra data.
1466 */
1467 if (req->req.status != -EOVERFLOW)
1468 DEBUG_EP0("%s overflow %d\n", ep->ep.name,
1469 count);
1470 req->req.status = -EOVERFLOW;
1471 } else {
1472 *buf++ = byte;
1473 bufferspace--;
1474 }
1475 }
1476
1477 /* completion */
1478 if (is_short || req->req.actual == req->req.length) {
1479 done(ep, req, 0);
1480 return 1;
1481 }
1482
1483 /* finished that packet. the next one may be waiting... */
1484 return 0;
1485 }
1486
1487 /**
1488 * udc_set_address - set the USB address for this device
1489 * @address:
1490 *
1491 * Called from control endpoint function after it decodes a set address setup packet.
1492 */
1493 static void udc_set_address(struct lh7a40x_udc *dev, unsigned char address)
1494 {
1495 DEBUG_EP0("%s: %d\n", __func__, address);
1496 /* c.f. 15.1.2.2 Table 15-4 address will be used after DATA_END is set */
1497 dev->usb_address = address;
1498 usb_set((address & USB_FA_FUNCTION_ADDR), USB_FA);
1499 usb_set(USB_FA_ADDR_UPDATE | (address & USB_FA_FUNCTION_ADDR), USB_FA);
1500 /* usb_read(USB_FA); */
1501 }
1502
1503 /*
1504 * DATA_STATE_RECV (OUT_PKT_RDY)
1505 * - if error
1506 * set EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL bits
1507 * - else
1508 * set EP0_CLR_OUT bit
1509 if last set EP0_DATA_END bit
1510 */
1511 static void lh7a40x_ep0_out(struct lh7a40x_udc *dev, u32 csr)
1512 {
1513 struct lh7a40x_request *req;
1514 struct lh7a40x_ep *ep = &dev->ep[0];
1515 int ret;
1516
1517 DEBUG_EP0("%s: %x\n", __func__, csr);
1518
1519 if (list_empty(&ep->queue))
1520 req = 0;
1521 else
1522 req = list_entry(ep->queue.next, struct lh7a40x_request, queue);
1523
1524 if (req) {
1525
1526 if (req->req.length == 0) {
1527 DEBUG_EP0("ZERO LENGTH OUT!\n");
1528 usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR);
1529 dev->ep0state = WAIT_FOR_SETUP;
1530 return;
1531 }
1532 ret = read_fifo_ep0(ep, req);
1533 if (ret) {
1534 /* Done! */
1535 DEBUG_EP0("%s: finished, waiting for status\n",
1536 __func__);
1537
1538 usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR);
1539 dev->ep0state = WAIT_FOR_SETUP;
1540 } else {
1541 /* Not done yet.. */
1542 DEBUG_EP0("%s: not finished\n", __func__);
1543 usb_set(EP0_CLR_OUT, USB_EP0_CSR);
1544 }
1545 } else {
1546 DEBUG_EP0("NO REQ??!\n");
1547 }
1548 }
1549
1550 /*
1551 * DATA_STATE_XMIT
1552 */
1553 static int lh7a40x_ep0_in(struct lh7a40x_udc *dev, u32 csr)
1554 {
1555 struct lh7a40x_request *req;
1556 struct lh7a40x_ep *ep = &dev->ep[0];
1557 int ret, need_zlp = 0;
1558
1559 DEBUG_EP0("%s: %x\n", __func__, csr);
1560
1561 if (list_empty(&ep->queue))
1562 req = 0;
1563 else
1564 req = list_entry(ep->queue.next, struct lh7a40x_request, queue);
1565
1566 if (!req) {
1567 DEBUG_EP0("%s: NULL REQ\n", __func__);
1568 return 0;
1569 }
1570
1571 if (req->req.length == 0) {
1572
1573 usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1574 dev->ep0state = WAIT_FOR_SETUP;
1575 return 1;
1576 }
1577
1578 if (req->req.length - req->req.actual == EP0_PACKETSIZE) {
1579 /* Next write will end with the packet size, */
1580 /* so we need Zero-length-packet */
1581 need_zlp = 1;
1582 }
1583
1584 ret = write_fifo_ep0(ep, req);
1585
1586 if (ret == 1 && !need_zlp) {
1587 /* Last packet */
1588 DEBUG_EP0("%s: finished, waiting for status\n", __func__);
1589
1590 usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1591 dev->ep0state = WAIT_FOR_SETUP;
1592 } else {
1593 DEBUG_EP0("%s: not finished\n", __func__);
1594 usb_set(EP0_IN_PKT_RDY, USB_EP0_CSR);
1595 }
1596
1597 if (need_zlp) {
1598 DEBUG_EP0("%s: Need ZLP!\n", __func__);
1599 usb_set(EP0_IN_PKT_RDY, USB_EP0_CSR);
1600 dev->ep0state = DATA_STATE_NEED_ZLP;
1601 }
1602
1603 return 1;
1604 }
1605
1606 static int lh7a40x_handle_get_status(struct lh7a40x_udc *dev,
1607 struct usb_ctrlrequest *ctrl)
1608 {
1609 struct lh7a40x_ep *ep0 = &dev->ep[0];
1610 struct lh7a40x_ep *qep;
1611 int reqtype = (ctrl->bRequestType & USB_RECIP_MASK);
1612 u16 val = 0;
1613
1614 if (reqtype == USB_RECIP_INTERFACE) {
1615 /* This is not supported.
1616 * And according to the USB spec, this one does nothing..
1617 * Just return 0
1618 */
1619 DEBUG_SETUP("GET_STATUS: USB_RECIP_INTERFACE\n");
1620 } else if (reqtype == USB_RECIP_DEVICE) {
1621 DEBUG_SETUP("GET_STATUS: USB_RECIP_DEVICE\n");
1622 val |= (1 << 0); /* Self powered */
1623 /*val |= (1<<1); *//* Remote wakeup */
1624 } else if (reqtype == USB_RECIP_ENDPOINT) {
1625 int ep_num = (ctrl->wIndex & ~USB_DIR_IN);
1626
1627 DEBUG_SETUP
1628 ("GET_STATUS: USB_RECIP_ENDPOINT (%d), ctrl->wLength = %d\n",
1629 ep_num, ctrl->wLength);
1630
1631 if (ctrl->wLength > 2 || ep_num > 3)
1632 return -EOPNOTSUPP;
1633
1634 qep = &dev->ep[ep_num];
1635 if (ep_is_in(qep) != ((ctrl->wIndex & USB_DIR_IN) ? 1 : 0)
1636 && ep_index(qep) != 0) {
1637 return -EOPNOTSUPP;
1638 }
1639
1640 usb_set_index(ep_index(qep));
1641
1642 /* Return status on next IN token */
1643 switch (qep->ep_type) {
1644 case ep_control:
1645 val =
1646 (usb_read(qep->csr1) & EP0_SEND_STALL) ==
1647 EP0_SEND_STALL;
1648 break;
1649 case ep_bulk_in:
1650 case ep_interrupt:
1651 val =
1652 (usb_read(qep->csr1) & USB_IN_CSR1_SEND_STALL) ==
1653 USB_IN_CSR1_SEND_STALL;
1654 break;
1655 case ep_bulk_out:
1656 val =
1657 (usb_read(qep->csr1) & USB_OUT_CSR1_SEND_STALL) ==
1658 USB_OUT_CSR1_SEND_STALL;
1659 break;
1660 }
1661
1662 /* Back to EP0 index */
1663 usb_set_index(0);
1664
1665 DEBUG_SETUP("GET_STATUS, ep: %d (%x), val = %d\n", ep_num,
1666 ctrl->wIndex, val);
1667 } else {
1668 DEBUG_SETUP("Unknown REQ TYPE: %d\n", reqtype);
1669 return -EOPNOTSUPP;
1670 }
1671
1672 /* Clear "out packet ready" */
1673 usb_set((EP0_CLR_OUT), USB_EP0_CSR);
1674 /* Put status to FIFO */
1675 lh7a40x_fifo_write(ep0, (u8 *) & val, sizeof(val));
1676 /* Issue "In packet ready" */
1677 usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1678
1679 return 0;
1680 }
1681
1682 /*
1683 * WAIT_FOR_SETUP (OUT_PKT_RDY)
1684 * - read data packet from EP0 FIFO
1685 * - decode command
1686 * - if error
1687 * set EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL bits
1688 * - else
1689 * set EP0_CLR_OUT | EP0_DATA_END bits
1690 */
1691 static void lh7a40x_ep0_setup(struct lh7a40x_udc *dev, u32 csr)
1692 {
1693 struct lh7a40x_ep *ep = &dev->ep[0];
1694 struct usb_ctrlrequest ctrl;
1695 int i, bytes, is_in;
1696
1697 DEBUG_SETUP("%s: %x\n", __func__, csr);
1698
1699 /* Nuke all previous transfers */
1700 nuke(ep, -EPROTO);
1701
1702 /* read control req from fifo (8 bytes) */
1703 bytes = lh7a40x_fifo_read(ep, (unsigned char *)&ctrl, 8);
1704
1705 DEBUG_SETUP("Read CTRL REQ %d bytes\n", bytes);
1706 DEBUG_SETUP("CTRL.bRequestType = %d (is_in %d)\n", ctrl.bRequestType,
1707 ctrl.bRequestType == USB_DIR_IN);
1708 DEBUG_SETUP("CTRL.bRequest = %d\n", ctrl.bRequest);
1709 DEBUG_SETUP("CTRL.wLength = %d\n", ctrl.wLength);
1710 DEBUG_SETUP("CTRL.wValue = %d (%d)\n", ctrl.wValue, ctrl.wValue >> 8);
1711 DEBUG_SETUP("CTRL.wIndex = %d\n", ctrl.wIndex);
1712
1713 /* Set direction of EP0 */
1714 if (likely(ctrl.bRequestType & USB_DIR_IN)) {
1715 ep->bEndpointAddress |= USB_DIR_IN;
1716 is_in = 1;
1717 } else {
1718 ep->bEndpointAddress &= ~USB_DIR_IN;
1719 is_in = 0;
1720 }
1721
1722 dev->req_pending = 1;
1723
1724 /* Handle some SETUP packets ourselves */
1725 switch (ctrl.bRequest) {
1726 case USB_REQ_SET_ADDRESS:
1727 if (ctrl.bRequestType != (USB_TYPE_STANDARD | USB_RECIP_DEVICE))
1728 break;
1729
1730 DEBUG_SETUP("USB_REQ_SET_ADDRESS (%d)\n", ctrl.wValue);
1731 udc_set_address(dev, ctrl.wValue);
1732 usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR);
1733 return;
1734
1735 case USB_REQ_GET_STATUS:{
1736 if (lh7a40x_handle_get_status(dev, &ctrl) == 0)
1737 return;
1738
1739 case USB_REQ_CLEAR_FEATURE:
1740 case USB_REQ_SET_FEATURE:
1741 if (ctrl.bRequestType == USB_RECIP_ENDPOINT) {
1742 struct lh7a40x_ep *qep;
1743 int ep_num = (ctrl.wIndex & 0x0f);
1744
1745 /* Support only HALT feature */
1746 if (ctrl.wValue != 0 || ctrl.wLength != 0
1747 || ep_num > 3 || ep_num < 1)
1748 break;
1749
1750 qep = &dev->ep[ep_num];
1751 spin_unlock(&dev->lock);
1752 if (ctrl.bRequest == USB_REQ_SET_FEATURE) {
1753 DEBUG_SETUP("SET_FEATURE (%d)\n",
1754 ep_num);
1755 lh7a40x_set_halt(&qep->ep, 1);
1756 } else {
1757 DEBUG_SETUP("CLR_FEATURE (%d)\n",
1758 ep_num);
1759 lh7a40x_set_halt(&qep->ep, 0);
1760 }
1761 spin_lock(&dev->lock);
1762 usb_set_index(0);
1763
1764 /* Reply with a ZLP on next IN token */
1765 usb_set((EP0_CLR_OUT | EP0_DATA_END),
1766 USB_EP0_CSR);
1767 return;
1768 }
1769 break;
1770 }
1771
1772 default:
1773 break;
1774 }
1775
1776 if (likely(dev->driver)) {
1777 /* device-2-host (IN) or no data setup command, process immediately */
1778 spin_unlock(&dev->lock);
1779 i = dev->driver->setup(&dev->gadget, &ctrl);
1780 spin_lock(&dev->lock);
1781
1782 if (i < 0) {
1783 /* setup processing failed, force stall */
1784 DEBUG_SETUP
1785 (" --> ERROR: gadget setup FAILED (stalling), setup returned %d\n",
1786 i);
1787 usb_set_index(0);
1788 usb_set((EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL),
1789 USB_EP0_CSR);
1790
1791 /* ep->stopped = 1; */
1792 dev->ep0state = WAIT_FOR_SETUP;
1793 }
1794 }
1795 }
1796
1797 /*
1798 * DATA_STATE_NEED_ZLP
1799 */
1800 static void lh7a40x_ep0_in_zlp(struct lh7a40x_udc *dev, u32 csr)
1801 {
1802 DEBUG_EP0("%s: %x\n", __func__, csr);
1803
1804 /* c.f. Table 15-14 */
1805 usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1806 dev->ep0state = WAIT_FOR_SETUP;
1807 }
1808
1809 /*
1810 * handle ep0 interrupt
1811 */
1812 static void lh7a40x_handle_ep0(struct lh7a40x_udc *dev, u32 intr)
1813 {
1814 struct lh7a40x_ep *ep = &dev->ep[0];
1815 u32 csr;
1816
1817 /* Set index 0 */
1818 usb_set_index(0);
1819 csr = usb_read(USB_EP0_CSR);
1820
1821 DEBUG_EP0("%s: csr = %x\n", __func__, csr);
1822
1823 /*
1824 * For overview of what we should be doing see c.f. Chapter 18.1.2.4
1825 * We will follow that outline here modified by our own global state
1826 * indication which provides hints as to what we think should be
1827 * happening..
1828 */
1829
1830 /*
1831 * if SENT_STALL is set
1832 * - clear the SENT_STALL bit
1833 */
1834 if (csr & EP0_SENT_STALL) {
1835 DEBUG_EP0("%s: EP0_SENT_STALL is set: %x\n", __func__, csr);
1836 usb_clear((EP0_SENT_STALL | EP0_SEND_STALL), USB_EP0_CSR);
1837 nuke(ep, -ECONNABORTED);
1838 dev->ep0state = WAIT_FOR_SETUP;
1839 return;
1840 }
1841
1842 /*
1843 * if a transfer is in progress && IN_PKT_RDY and OUT_PKT_RDY are clear
1844 * - fill EP0 FIFO
1845 * - if last packet
1846 * - set IN_PKT_RDY | DATA_END
1847 * - else
1848 * set IN_PKT_RDY
1849 */
1850 if (!(csr & (EP0_IN_PKT_RDY | EP0_OUT_PKT_RDY))) {
1851 DEBUG_EP0("%s: IN_PKT_RDY and OUT_PKT_RDY are clear\n",
1852 __func__);
1853
1854 switch (dev->ep0state) {
1855 case DATA_STATE_XMIT:
1856 DEBUG_EP0("continue with DATA_STATE_XMIT\n");
1857 lh7a40x_ep0_in(dev, csr);
1858 return;
1859 case DATA_STATE_NEED_ZLP:
1860 DEBUG_EP0("continue with DATA_STATE_NEED_ZLP\n");
1861 lh7a40x_ep0_in_zlp(dev, csr);
1862 return;
1863 default:
1864 /* Stall? */
1865 DEBUG_EP0("Odd state!! state = %s\n",
1866 state_names[dev->ep0state]);
1867 dev->ep0state = WAIT_FOR_SETUP;
1868 /* nuke(ep, 0); */
1869 /* usb_set(EP0_SEND_STALL, ep->csr1); */
1870 break;
1871 }
1872 }
1873
1874 /*
1875 * if SETUP_END is set
1876 * - abort the last transfer
1877 * - set SERVICED_SETUP_END_BIT
1878 */
1879 if (csr & EP0_SETUP_END) {
1880 DEBUG_EP0("%s: EP0_SETUP_END is set: %x\n", __func__, csr);
1881
1882 usb_set(EP0_CLR_SETUP_END, USB_EP0_CSR);
1883
1884 nuke(ep, 0);
1885 dev->ep0state = WAIT_FOR_SETUP;
1886 }
1887
1888 /*
1889 * if EP0_OUT_PKT_RDY is set
1890 * - read data packet from EP0 FIFO
1891 * - decode command
1892 * - if error
1893 * set SERVICED_OUT_PKT_RDY | DATA_END bits | SEND_STALL
1894 * - else
1895 * set SERVICED_OUT_PKT_RDY | DATA_END bits
1896 */
1897 if (csr & EP0_OUT_PKT_RDY) {
1898
1899 DEBUG_EP0("%s: EP0_OUT_PKT_RDY is set: %x\n", __func__,
1900 csr);
1901
1902 switch (dev->ep0state) {
1903 case WAIT_FOR_SETUP:
1904 DEBUG_EP0("WAIT_FOR_SETUP\n");
1905 lh7a40x_ep0_setup(dev, csr);
1906 break;
1907
1908 case DATA_STATE_RECV:
1909 DEBUG_EP0("DATA_STATE_RECV\n");
1910 lh7a40x_ep0_out(dev, csr);
1911 break;
1912
1913 default:
1914 /* send stall? */
1915 DEBUG_EP0("strange state!! 2. send stall? state = %d\n",
1916 dev->ep0state);
1917 break;
1918 }
1919 }
1920 }
1921
1922 static void lh7a40x_ep0_kick(struct lh7a40x_udc *dev, struct lh7a40x_ep *ep)
1923 {
1924 u32 csr;
1925
1926 usb_set_index(0);
1927 csr = usb_read(USB_EP0_CSR);
1928
1929 DEBUG_EP0("%s: %x\n", __func__, csr);
1930
1931 /* Clear "out packet ready" */
1932 usb_set(EP0_CLR_OUT, USB_EP0_CSR);
1933
1934 if (ep_is_in(ep)) {
1935 dev->ep0state = DATA_STATE_XMIT;
1936 lh7a40x_ep0_in(dev, csr);
1937 } else {
1938 dev->ep0state = DATA_STATE_RECV;
1939 lh7a40x_ep0_out(dev, csr);
1940 }
1941 }
1942
1943 /* ---------------------------------------------------------------------------
1944 * device-scoped parts of the api to the usb controller hardware
1945 * ---------------------------------------------------------------------------
1946 */
1947
1948 static int lh7a40x_udc_get_frame(struct usb_gadget *_gadget)
1949 {
1950 u32 frame1 = usb_read(USB_FRM_NUM1); /* Least significant 8 bits */
1951 u32 frame2 = usb_read(USB_FRM_NUM2); /* Most significant 3 bits */
1952 DEBUG("%s, %p\n", __func__, _gadget);
1953 return ((frame2 & 0x07) << 8) | (frame1 & 0xff);
1954 }
1955
1956 static int lh7a40x_udc_wakeup(struct usb_gadget *_gadget)
1957 {
1958 /* host may not have enabled remote wakeup */
1959 /*if ((UDCCS0 & UDCCS0_DRWF) == 0)
1960 return -EHOSTUNREACH;
1961 udc_set_mask_UDCCR(UDCCR_RSM); */
1962 return -ENOTSUPP;
1963 }
1964
1965 static const struct usb_gadget_ops lh7a40x_udc_ops = {
1966 .get_frame = lh7a40x_udc_get_frame,
1967 .wakeup = lh7a40x_udc_wakeup,
1968 /* current versions must always be self-powered */
1969 };
1970
1971 static void nop_release(struct device *dev)
1972 {
1973 DEBUG("%s %s\n", __func__, dev_name(dev));
1974 }
1975
1976 static struct lh7a40x_udc memory = {
1977 .usb_address = 0,
1978
1979 .gadget = {
1980 .ops = &lh7a40x_udc_ops,
1981 .ep0 = &memory.ep[0].ep,
1982 .name = driver_name,
1983 .dev = {
1984 .bus_id = "gadget",
1985 .release = nop_release,
1986 },
1987 },
1988
1989 /* control endpoint */
1990 .ep[0] = {
1991 .ep = {
1992 .name = ep0name,
1993 .ops = &lh7a40x_ep_ops,
1994 .maxpacket = EP0_PACKETSIZE,
1995 },
1996 .dev = &memory,
1997
1998 .bEndpointAddress = 0,
1999 .bmAttributes = 0,
2000
2001 .ep_type = ep_control,
2002 .fifo = io_p2v(USB_EP0_FIFO),
2003 .csr1 = USB_EP0_CSR,
2004 .csr2 = USB_EP0_CSR,
2005 },
2006
2007 /* first group of endpoints */
2008 .ep[1] = {
2009 .ep = {
2010 .name = "ep1in-bulk",
2011 .ops = &lh7a40x_ep_ops,
2012 .maxpacket = 64,
2013 },
2014 .dev = &memory,
2015
2016 .bEndpointAddress = USB_DIR_IN | 1,
2017 .bmAttributes = USB_ENDPOINT_XFER_BULK,
2018
2019 .ep_type = ep_bulk_in,
2020 .fifo = io_p2v(USB_EP1_FIFO),
2021 .csr1 = USB_IN_CSR1,
2022 .csr2 = USB_IN_CSR2,
2023 },
2024
2025 .ep[2] = {
2026 .ep = {
2027 .name = "ep2out-bulk",
2028 .ops = &lh7a40x_ep_ops,
2029 .maxpacket = 64,
2030 },
2031 .dev = &memory,
2032
2033 .bEndpointAddress = 2,
2034 .bmAttributes = USB_ENDPOINT_XFER_BULK,
2035
2036 .ep_type = ep_bulk_out,
2037 .fifo = io_p2v(USB_EP2_FIFO),
2038 .csr1 = USB_OUT_CSR1,
2039 .csr2 = USB_OUT_CSR2,
2040 },
2041
2042 .ep[3] = {
2043 .ep = {
2044 .name = "ep3in-int",
2045 .ops = &lh7a40x_ep_ops,
2046 .maxpacket = 64,
2047 },
2048 .dev = &memory,
2049
2050 .bEndpointAddress = USB_DIR_IN | 3,
2051 .bmAttributes = USB_ENDPOINT_XFER_INT,
2052
2053 .ep_type = ep_interrupt,
2054 .fifo = io_p2v(USB_EP3_FIFO),
2055 .csr1 = USB_IN_CSR1,
2056 .csr2 = USB_IN_CSR2,
2057 },
2058 };
2059
2060 /*
2061 * probe - binds to the platform device
2062 */
2063 static int lh7a40x_udc_probe(struct platform_device *pdev)
2064 {
2065 struct lh7a40x_udc *dev = &memory;
2066 int retval;
2067
2068 DEBUG("%s: %p\n", __func__, pdev);
2069
2070 spin_lock_init(&dev->lock);
2071 dev->dev = &pdev->dev;
2072
2073 device_initialize(&dev->gadget.dev);
2074 dev->gadget.dev.parent = &pdev->dev;
2075
2076 the_controller = dev;
2077 platform_set_drvdata(pdev, dev);
2078
2079 udc_disable(dev);
2080 udc_reinit(dev);
2081
2082 /* irq setup after old hardware state is cleaned up */
2083 retval =
2084 request_irq(IRQ_USBINTR, lh7a40x_udc_irq, IRQF_DISABLED, driver_name,
2085 dev);
2086 if (retval != 0) {
2087 DEBUG(KERN_ERR "%s: can't get irq %i, err %d\n", driver_name,
2088 IRQ_USBINTR, retval);
2089 return -EBUSY;
2090 }
2091
2092 create_proc_files();
2093
2094 return retval;
2095 }
2096
2097 static int lh7a40x_udc_remove(struct platform_device *pdev)
2098 {
2099 struct lh7a40x_udc *dev = platform_get_drvdata(pdev);
2100
2101 DEBUG("%s: %p\n", __func__, pdev);
2102
2103 if (dev->driver)
2104 return -EBUSY;
2105
2106 udc_disable(dev);
2107 remove_proc_files();
2108
2109 free_irq(IRQ_USBINTR, dev);
2110
2111 platform_set_drvdata(pdev, 0);
2112
2113 the_controller = 0;
2114
2115 return 0;
2116 }
2117
2118 /*-------------------------------------------------------------------------*/
2119
2120 static struct platform_driver udc_driver = {
2121 .probe = lh7a40x_udc_probe,
2122 .remove = lh7a40x_udc_remove,
2123 /* FIXME power management support */
2124 /* .suspend = ... disable UDC */
2125 /* .resume = ... re-enable UDC */
2126 .driver = {
2127 .name = (char *)driver_name,
2128 .owner = THIS_MODULE,
2129 },
2130 };
2131
2132 static int __init udc_init(void)
2133 {
2134 DEBUG("%s: %s version %s\n", __func__, driver_name, DRIVER_VERSION);
2135 return platform_driver_register(&udc_driver);
2136 }
2137
2138 static void __exit udc_exit(void)
2139 {
2140 platform_driver_unregister(&udc_driver);
2141 }
2142
2143 module_init(udc_init);
2144 module_exit(udc_exit);
2145
2146 MODULE_DESCRIPTION(DRIVER_DESC);
2147 MODULE_AUTHOR("Mikko Lahteenmaki, Bo Henriksen");
2148 MODULE_LICENSE("GPL");
2149 MODULE_ALIAS("platform:lh7a40x_udc");
Linux kernel - Deliverables
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