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fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / drivers / usb / gadget / lh7a40x_udc.c
blobe78c2ddc1f88a47e6cbd52007d088f43269e8fee
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", __FUNCTION__, 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", __FUNCTION__, 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", __FUNCTION__, 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", __FUNCTION__, 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 device_del(&dev->gadget.dev);
478
479 udc_disable(dev);
480
481 DEBUG("unregistered gadget driver '%s'\n", driver->driver.name);
482 return 0;
483 }
484
485 EXPORT_SYMBOL(usb_gadget_unregister_driver);
486
487 /*-------------------------------------------------------------------------*/
488
489 /** Write request to FIFO (max write == maxp size)
490 * Return: 0 = still running, 1 = completed, negative = errno
491 * NOTE: INDEX register must be set for EP
492 */
493 static int write_fifo(struct lh7a40x_ep *ep, struct lh7a40x_request *req)
494 {
495 u32 max;
496 u32 csr;
497
498 max = le16_to_cpu(ep->desc->wMaxPacketSize);
499
500 csr = usb_read(ep->csr1);
501 DEBUG("CSR: %x %d\n", csr, csr & USB_IN_CSR1_FIFO_NOT_EMPTY);
502
503 if (!(csr & USB_IN_CSR1_FIFO_NOT_EMPTY)) {
504 unsigned count;
505 int is_last, is_short;
506
507 count = write_packet(ep, req, max);
508 usb_set(USB_IN_CSR1_IN_PKT_RDY, ep->csr1);
509
510 /* last packet is usually short (or a zlp) */
511 if (unlikely(count != max))
512 is_last = is_short = 1;
513 else {
514 if (likely(req->req.length != req->req.actual)
515 || req->req.zero)
516 is_last = 0;
517 else
518 is_last = 1;
519 /* interrupt/iso maxpacket may not fill the fifo */
520 is_short = unlikely(max < ep_maxpacket(ep));
521 }
522
523 DEBUG("%s: wrote %s %d bytes%s%s %d left %p\n", __FUNCTION__,
524 ep->ep.name, count,
525 is_last ? "/L" : "", is_short ? "/S" : "",
526 req->req.length - req->req.actual, req);
527
528 /* requests complete when all IN data is in the FIFO */
529 if (is_last) {
530 done(ep, req, 0);
531 if (list_empty(&ep->queue)) {
532 pio_irq_disable(ep_index(ep));
533 }
534 return 1;
535 }
536 } else {
537 DEBUG("Hmm.. %d ep FIFO is not empty!\n", ep_index(ep));
538 }
539
540 return 0;
541 }
542
543 /** Read to request from FIFO (max read == bytes in fifo)
544 * Return: 0 = still running, 1 = completed, negative = errno
545 * NOTE: INDEX register must be set for EP
546 */
547 static int read_fifo(struct lh7a40x_ep *ep, struct lh7a40x_request *req)
548 {
549 u32 csr;
550 u8 *buf;
551 unsigned bufferspace, count, is_short;
552 volatile u32 *fifo = (volatile u32 *)ep->fifo;
553
554 /* make sure there's a packet in the FIFO. */
555 csr = usb_read(ep->csr1);
556 if (!(csr & USB_OUT_CSR1_OUT_PKT_RDY)) {
557 DEBUG("%s: Packet NOT ready!\n", __FUNCTION__);
558 return -EINVAL;
559 }
560
561 buf = req->req.buf + req->req.actual;
562 prefetchw(buf);
563 bufferspace = req->req.length - req->req.actual;
564
565 /* read all bytes from this packet */
566 count = usb_read(USB_OUT_FIFO_WC1);
567 req->req.actual += min(count, bufferspace);
568
569 is_short = (count < ep->ep.maxpacket);
570 DEBUG("read %s %02x, %d bytes%s req %p %d/%d\n",
571 ep->ep.name, csr, count,
572 is_short ? "/S" : "", req, req->req.actual, req->req.length);
573
574 while (likely(count-- != 0)) {
575 u8 byte = (u8) (*fifo & 0xff);
576
577 if (unlikely(bufferspace == 0)) {
578 /* this happens when the driver's buffer
579 * is smaller than what the host sent.
580 * discard the extra data.
581 */
582 if (req->req.status != -EOVERFLOW)
583 printk("%s overflow %d\n", ep->ep.name, count);
584 req->req.status = -EOVERFLOW;
585 } else {
586 *buf++ = byte;
587 bufferspace--;
588 }
589 }
590
591 usb_clear(USB_OUT_CSR1_OUT_PKT_RDY, ep->csr1);
592
593 /* completion */
594 if (is_short || req->req.actual == req->req.length) {
595 done(ep, req, 0);
596 usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1);
597
598 if (list_empty(&ep->queue))
599 pio_irq_disable(ep_index(ep));
600 return 1;
601 }
602
603 /* finished that packet. the next one may be waiting... */
604 return 0;
605 }
606
607 /*
608 * done - retire a request; caller blocked irqs
609 * INDEX register is preserved to keep same
610 */
611 static void done(struct lh7a40x_ep *ep, struct lh7a40x_request *req, int status)
612 {
613 unsigned int stopped = ep->stopped;
614 u32 index;
615
616 DEBUG("%s, %p\n", __FUNCTION__, ep);
617 list_del_init(&req->queue);
618
619 if (likely(req->req.status == -EINPROGRESS))
620 req->req.status = status;
621 else
622 status = req->req.status;
623
624 if (status && status != -ESHUTDOWN)
625 DEBUG("complete %s req %p stat %d len %u/%u\n",
626 ep->ep.name, &req->req, status,
627 req->req.actual, req->req.length);
628
629 /* don't modify queue heads during completion callback */
630 ep->stopped = 1;
631 /* Read current index (completion may modify it) */
632 index = usb_read(USB_INDEX);
633
634 spin_unlock(&ep->dev->lock);
635 req->req.complete(&ep->ep, &req->req);
636 spin_lock(&ep->dev->lock);
637
638 /* Restore index */
639 usb_set_index(index);
640 ep->stopped = stopped;
641 }
642
643 /** Enable EP interrupt */
644 static void pio_irq_enable(int ep)
645 {
646 DEBUG("%s: %d\n", __FUNCTION__, ep);
647
648 switch (ep) {
649 case 1:
650 usb_set(USB_IN_INT_EP1, USB_IN_INT_EN);
651 break;
652 case 2:
653 usb_set(USB_OUT_INT_EP2, USB_OUT_INT_EN);
654 break;
655 case 3:
656 usb_set(USB_IN_INT_EP3, USB_IN_INT_EN);
657 break;
658 default:
659 DEBUG("Unknown endpoint: %d\n", ep);
660 break;
661 }
662 }
663
664 /** Disable EP interrupt */
665 static void pio_irq_disable(int ep)
666 {
667 DEBUG("%s: %d\n", __FUNCTION__, ep);
668
669 switch (ep) {
670 case 1:
671 usb_clear(USB_IN_INT_EP1, USB_IN_INT_EN);
672 break;
673 case 2:
674 usb_clear(USB_OUT_INT_EP2, USB_OUT_INT_EN);
675 break;
676 case 3:
677 usb_clear(USB_IN_INT_EP3, USB_IN_INT_EN);
678 break;
679 default:
680 DEBUG("Unknown endpoint: %d\n", ep);
681 break;
682 }
683 }
684
685 /*
686 * nuke - dequeue ALL requests
687 */
688 void nuke(struct lh7a40x_ep *ep, int status)
689 {
690 struct lh7a40x_request *req;
691
692 DEBUG("%s, %p\n", __FUNCTION__, ep);
693
694 /* Flush FIFO */
695 flush(ep);
696
697 /* called with irqs blocked */
698 while (!list_empty(&ep->queue)) {
699 req = list_entry(ep->queue.next, struct lh7a40x_request, queue);
700 done(ep, req, status);
701 }
702
703 /* Disable IRQ if EP is enabled (has descriptor) */
704 if (ep->desc)
705 pio_irq_disable(ep_index(ep));
706 }
707
708 /*
709 void nuke_all(struct lh7a40x_udc *dev)
710 {
711 int n;
712 for(n=0; n<UDC_MAX_ENDPOINTS; n++) {
713 struct lh7a40x_ep *ep = &dev->ep[n];
714 usb_set_index(n);
715 nuke(ep, 0);
716 }
717 }*/
718
719 /*
720 static void flush_all(struct lh7a40x_udc *dev)
721 {
722 int n;
723 for (n = 0; n < UDC_MAX_ENDPOINTS; n++)
724 {
725 struct lh7a40x_ep *ep = &dev->ep[n];
726 flush(ep);
727 }
728 }
729 */
730
731 /** Flush EP
732 * NOTE: INDEX register must be set before this call
733 */
734 static void flush(struct lh7a40x_ep *ep)
735 {
736 DEBUG("%s, %p\n", __FUNCTION__, ep);
737
738 switch (ep->ep_type) {
739 case ep_control:
740 /* check, by implication c.f. 15.1.2.11 */
741 break;
742
743 case ep_bulk_in:
744 case ep_interrupt:
745 /* if(csr & USB_IN_CSR1_IN_PKT_RDY) */
746 usb_set(USB_IN_CSR1_FIFO_FLUSH, ep->csr1);
747 break;
748
749 case ep_bulk_out:
750 /* if(csr & USB_OUT_CSR1_OUT_PKT_RDY) */
751 usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1);
752 break;
753 }
754 }
755
756 /**
757 * lh7a40x_in_epn - handle IN interrupt
758 */
759 static void lh7a40x_in_epn(struct lh7a40x_udc *dev, u32 ep_idx, u32 intr)
760 {
761 u32 csr;
762 struct lh7a40x_ep *ep = &dev->ep[ep_idx];
763 struct lh7a40x_request *req;
764
765 usb_set_index(ep_idx);
766
767 csr = usb_read(ep->csr1);
768 DEBUG("%s: %d, csr %x\n", __FUNCTION__, ep_idx, csr);
769
770 if (csr & USB_IN_CSR1_SENT_STALL) {
771 DEBUG("USB_IN_CSR1_SENT_STALL\n");
772 usb_set(USB_IN_CSR1_SENT_STALL /*|USB_IN_CSR1_SEND_STALL */ ,
773 ep->csr1);
774 return;
775 }
776
777 if (!ep->desc) {
778 DEBUG("%s: NO EP DESC\n", __FUNCTION__);
779 return;
780 }
781
782 if (list_empty(&ep->queue))
783 req = 0;
784 else
785 req = list_entry(ep->queue.next, struct lh7a40x_request, queue);
786
787 DEBUG("req: %p\n", req);
788
789 if (!req)
790 return;
791
792 write_fifo(ep, req);
793 }
794
795 /* ********************************************************************************************* */
796 /* Bulk OUT (recv)
797 */
798
799 static void lh7a40x_out_epn(struct lh7a40x_udc *dev, u32 ep_idx, u32 intr)
800 {
801 struct lh7a40x_ep *ep = &dev->ep[ep_idx];
802 struct lh7a40x_request *req;
803
804 DEBUG("%s: %d\n", __FUNCTION__, ep_idx);
805
806 usb_set_index(ep_idx);
807
808 if (ep->desc) {
809 u32 csr;
810 csr = usb_read(ep->csr1);
811
812 while ((csr =
813 usb_read(ep->
814 csr1)) & (USB_OUT_CSR1_OUT_PKT_RDY |
815 USB_OUT_CSR1_SENT_STALL)) {
816 DEBUG("%s: %x\n", __FUNCTION__, csr);
817
818 if (csr & USB_OUT_CSR1_SENT_STALL) {
819 DEBUG("%s: stall sent, flush fifo\n",
820 __FUNCTION__);
821 /* usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1); */
822 flush(ep);
823 } else if (csr & USB_OUT_CSR1_OUT_PKT_RDY) {
824 if (list_empty(&ep->queue))
825 req = 0;
826 else
827 req =
828 list_entry(ep->queue.next,
829 struct lh7a40x_request,
830 queue);
831
832 if (!req) {
833 printk("%s: NULL REQ %d\n",
834 __FUNCTION__, ep_idx);
835 flush(ep);
836 break;
837 } else {
838 read_fifo(ep, req);
839 }
840 }
841
842 }
843
844 } else {
845 /* Throw packet away.. */
846 printk("%s: No descriptor?!?\n", __FUNCTION__);
847 flush(ep);
848 }
849 }
850
851 static void stop_activity(struct lh7a40x_udc *dev,
852 struct usb_gadget_driver *driver)
853 {
854 int i;
855
856 /* don't disconnect drivers more than once */
857 if (dev->gadget.speed == USB_SPEED_UNKNOWN)
858 driver = 0;
859 dev->gadget.speed = USB_SPEED_UNKNOWN;
860
861 /* prevent new request submissions, kill any outstanding requests */
862 for (i = 0; i < UDC_MAX_ENDPOINTS; i++) {
863 struct lh7a40x_ep *ep = &dev->ep[i];
864 ep->stopped = 1;
865
866 usb_set_index(i);
867 nuke(ep, -ESHUTDOWN);
868 }
869
870 /* report disconnect; the driver is already quiesced */
871 if (driver) {
872 spin_unlock(&dev->lock);
873 driver->disconnect(&dev->gadget);
874 spin_lock(&dev->lock);
875 }
876
877 /* re-init driver-visible data structures */
878 udc_reinit(dev);
879 }
880
881 /** Handle USB RESET interrupt
882 */
883 static void lh7a40x_reset_intr(struct lh7a40x_udc *dev)
884 {
885 #if 0 /* def CONFIG_ARCH_LH7A404 */
886 /* Does not work always... */
887
888 DEBUG("%s: %d\n", __FUNCTION__, dev->usb_address);
889
890 if (!dev->usb_address) {
891 /*usb_set(USB_RESET_IO, USB_RESET);
892 mdelay(5);
893 usb_clear(USB_RESET_IO, USB_RESET); */
894 return;
895 }
896 /* Put the USB controller into reset. */
897 usb_set(USB_RESET_IO, USB_RESET);
898
899 /* Set Device ID to 0 */
900 udc_set_address(dev, 0);
901
902 /* Let PLL2 settle down */
903 mdelay(5);
904
905 /* Release the USB controller from reset */
906 usb_clear(USB_RESET_IO, USB_RESET);
907
908 /* Re-enable UDC */
909 udc_enable(dev);
910
911 #endif
912 dev->gadget.speed = USB_SPEED_FULL;
913 }
914
915 /*
916 * lh7a40x usb client interrupt handler.
917 */
918 static irqreturn_t lh7a40x_udc_irq(int irq, void *_dev)
919 {
920 struct lh7a40x_udc *dev = _dev;
921
922 DEBUG("\n\n");
923
924 spin_lock(&dev->lock);
925
926 for (;;) {
927 u32 intr_in = usb_read(USB_IN_INT);
928 u32 intr_out = usb_read(USB_OUT_INT);
929 u32 intr_int = usb_read(USB_INT);
930
931 /* Test also against enable bits.. (lh7a40x errata).. Sigh.. */
932 u32 in_en = usb_read(USB_IN_INT_EN);
933 u32 out_en = usb_read(USB_OUT_INT_EN);
934
935 if (!intr_out && !intr_in && !intr_int)
936 break;
937
938 DEBUG("%s (on state %s)\n", __FUNCTION__,
939 state_names[dev->ep0state]);
940 DEBUG("intr_out = %x\n", intr_out);
941 DEBUG("intr_in = %x\n", intr_in);
942 DEBUG("intr_int = %x\n", intr_int);
943
944 if (intr_in) {
945 usb_write(intr_in, USB_IN_INT);
946
947 if ((intr_in & USB_IN_INT_EP1)
948 && (in_en & USB_IN_INT_EP1)) {
949 DEBUG("USB_IN_INT_EP1\n");
950 lh7a40x_in_epn(dev, 1, intr_in);
951 }
952 if ((intr_in & USB_IN_INT_EP3)
953 && (in_en & USB_IN_INT_EP3)) {
954 DEBUG("USB_IN_INT_EP3\n");
955 lh7a40x_in_epn(dev, 3, intr_in);
956 }
957 if (intr_in & USB_IN_INT_EP0) {
958 DEBUG("USB_IN_INT_EP0 (control)\n");
959 lh7a40x_handle_ep0(dev, intr_in);
960 }
961 }
962
963 if (intr_out) {
964 usb_write(intr_out, USB_OUT_INT);
965
966 if ((intr_out & USB_OUT_INT_EP2)
967 && (out_en & USB_OUT_INT_EP2)) {
968 DEBUG("USB_OUT_INT_EP2\n");
969 lh7a40x_out_epn(dev, 2, intr_out);
970 }
971 }
972
973 if (intr_int) {
974 usb_write(intr_int, USB_INT);
975
976 if (intr_int & USB_INT_RESET_INT) {
977 lh7a40x_reset_intr(dev);
978 }
979
980 if (intr_int & USB_INT_RESUME_INT) {
981 DEBUG("USB resume\n");
982
983 if (dev->gadget.speed != USB_SPEED_UNKNOWN
984 && dev->driver
985 && dev->driver->resume
986 && is_usb_connected()) {
987 dev->driver->resume(&dev->gadget);
988 }
989 }
990
991 if (intr_int & USB_INT_SUSPEND_INT) {
992 DEBUG("USB suspend%s\n",
993 is_usb_connected()? "" : "+disconnect");
994 if (!is_usb_connected()) {
995 stop_activity(dev, dev->driver);
996 } else if (dev->gadget.speed !=
997 USB_SPEED_UNKNOWN && dev->driver
998 && dev->driver->suspend) {
999 dev->driver->suspend(&dev->gadget);
1000 }
1001 }
1002
1003 }
1004 }
1005
1006 spin_unlock(&dev->lock);
1007
1008 return IRQ_HANDLED;
1009 }
1010
1011 static int lh7a40x_ep_enable(struct usb_ep *_ep,
1012 const struct usb_endpoint_descriptor *desc)
1013 {
1014 struct lh7a40x_ep *ep;
1015 struct lh7a40x_udc *dev;
1016 unsigned long flags;
1017
1018 DEBUG("%s, %p\n", __FUNCTION__, _ep);
1019
1020 ep = container_of(_ep, struct lh7a40x_ep, ep);
1021 if (!_ep || !desc || ep->desc || _ep->name == ep0name
1022 || desc->bDescriptorType != USB_DT_ENDPOINT
1023 || ep->bEndpointAddress != desc->bEndpointAddress
1024 || ep_maxpacket(ep) < le16_to_cpu(desc->wMaxPacketSize)) {
1025 DEBUG("%s, bad ep or descriptor\n", __FUNCTION__);
1026 return -EINVAL;
1027 }
1028
1029 /* xfer types must match, except that interrupt ~= bulk */
1030 if (ep->bmAttributes != desc->bmAttributes
1031 && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
1032 && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
1033 DEBUG("%s, %s type mismatch\n", __FUNCTION__, _ep->name);
1034 return -EINVAL;
1035 }
1036
1037 /* hardware _could_ do smaller, but driver doesn't */
1038 if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
1039 && le16_to_cpu(desc->wMaxPacketSize) != ep_maxpacket(ep))
1040 || !desc->wMaxPacketSize) {
1041 DEBUG("%s, bad %s maxpacket\n", __FUNCTION__, _ep->name);
1042 return -ERANGE;
1043 }
1044
1045 dev = ep->dev;
1046 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
1047 DEBUG("%s, bogus device state\n", __FUNCTION__);
1048 return -ESHUTDOWN;
1049 }
1050
1051 spin_lock_irqsave(&ep->dev->lock, flags);
1052
1053 ep->stopped = 0;
1054 ep->desc = desc;
1055 ep->pio_irqs = 0;
1056 ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
1057
1058 spin_unlock_irqrestore(&ep->dev->lock, flags);
1059
1060 /* Reset halt state (does flush) */
1061 lh7a40x_set_halt(_ep, 0);
1062
1063 DEBUG("%s: enabled %s\n", __FUNCTION__, _ep->name);
1064 return 0;
1065 }
1066
1067 /** Disable EP
1068 * NOTE: Sets INDEX register
1069 */
1070 static int lh7a40x_ep_disable(struct usb_ep *_ep)
1071 {
1072 struct lh7a40x_ep *ep;
1073 unsigned long flags;
1074
1075 DEBUG("%s, %p\n", __FUNCTION__, _ep);
1076
1077 ep = container_of(_ep, struct lh7a40x_ep, ep);
1078 if (!_ep || !ep->desc) {
1079 DEBUG("%s, %s not enabled\n", __FUNCTION__,
1080 _ep ? ep->ep.name : NULL);
1081 return -EINVAL;
1082 }
1083
1084 spin_lock_irqsave(&ep->dev->lock, flags);
1085
1086 usb_set_index(ep_index(ep));
1087
1088 /* Nuke all pending requests (does flush) */
1089 nuke(ep, -ESHUTDOWN);
1090
1091 /* Disable ep IRQ */
1092 pio_irq_disable(ep_index(ep));
1093
1094 ep->desc = 0;
1095 ep->stopped = 1;
1096
1097 spin_unlock_irqrestore(&ep->dev->lock, flags);
1098
1099 DEBUG("%s: disabled %s\n", __FUNCTION__, _ep->name);
1100 return 0;
1101 }
1102
1103 static struct usb_request *lh7a40x_alloc_request(struct usb_ep *ep,
1104 gfp_t gfp_flags)
1105 {
1106 struct lh7a40x_request *req;
1107
1108 DEBUG("%s, %p\n", __FUNCTION__, ep);
1109
1110 req = kzalloc(sizeof(*req), gfp_flags);
1111 if (!req)
1112 return 0;
1113
1114 INIT_LIST_HEAD(&req->queue);
1115
1116 return &req->req;
1117 }
1118
1119 static void lh7a40x_free_request(struct usb_ep *ep, struct usb_request *_req)
1120 {
1121 struct lh7a40x_request *req;
1122
1123 DEBUG("%s, %p\n", __FUNCTION__, ep);
1124
1125 req = container_of(_req, struct lh7a40x_request, req);
1126 WARN_ON(!list_empty(&req->queue));
1127 kfree(req);
1128 }
1129
1130 /** Queue one request
1131 * Kickstart transfer if needed
1132 * NOTE: Sets INDEX register
1133 */
1134 static int lh7a40x_queue(struct usb_ep *_ep, struct usb_request *_req,
1135 gfp_t gfp_flags)
1136 {
1137 struct lh7a40x_request *req;
1138 struct lh7a40x_ep *ep;
1139 struct lh7a40x_udc *dev;
1140 unsigned long flags;
1141
1142 DEBUG("\n\n\n%s, %p\n", __FUNCTION__, _ep);
1143
1144 req = container_of(_req, struct lh7a40x_request, req);
1145 if (unlikely
1146 (!_req || !_req->complete || !_req->buf
1147 || !list_empty(&req->queue))) {
1148 DEBUG("%s, bad params\n", __FUNCTION__);
1149 return -EINVAL;
1150 }
1151
1152 ep = container_of(_ep, struct lh7a40x_ep, ep);
1153 if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1154 DEBUG("%s, bad ep\n", __FUNCTION__);
1155 return -EINVAL;
1156 }
1157
1158 dev = ep->dev;
1159 if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1160 DEBUG("%s, bogus device state %p\n", __FUNCTION__, dev->driver);
1161 return -ESHUTDOWN;
1162 }
1163
1164 DEBUG("%s queue req %p, len %d buf %p\n", _ep->name, _req, _req->length,
1165 _req->buf);
1166
1167 spin_lock_irqsave(&dev->lock, flags);
1168
1169 _req->status = -EINPROGRESS;
1170 _req->actual = 0;
1171
1172 /* kickstart this i/o queue? */
1173 DEBUG("Add to %d Q %d %d\n", ep_index(ep), list_empty(&ep->queue),
1174 ep->stopped);
1175 if (list_empty(&ep->queue) && likely(!ep->stopped)) {
1176 u32 csr;
1177
1178 if (unlikely(ep_index(ep) == 0)) {
1179 /* EP0 */
1180 list_add_tail(&req->queue, &ep->queue);
1181 lh7a40x_ep0_kick(dev, ep);
1182 req = 0;
1183 } else if (ep_is_in(ep)) {
1184 /* EP1 & EP3 */
1185 usb_set_index(ep_index(ep));
1186 csr = usb_read(ep->csr1);
1187 pio_irq_enable(ep_index(ep));
1188 if ((csr & USB_IN_CSR1_FIFO_NOT_EMPTY) == 0) {
1189 if (write_fifo(ep, req) == 1)
1190 req = 0;
1191 }
1192 } else {
1193 /* EP2 */
1194 usb_set_index(ep_index(ep));
1195 csr = usb_read(ep->csr1);
1196 pio_irq_enable(ep_index(ep));
1197 if (!(csr & USB_OUT_CSR1_FIFO_FULL)) {
1198 if (read_fifo(ep, req) == 1)
1199 req = 0;
1200 }
1201 }
1202 }
1203
1204 /* pio or dma irq handler advances the queue. */
1205 if (likely(req != 0))
1206 list_add_tail(&req->queue, &ep->queue);
1207
1208 spin_unlock_irqrestore(&dev->lock, flags);
1209
1210 return 0;
1211 }
1212
1213 /* dequeue JUST ONE request */
1214 static int lh7a40x_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1215 {
1216 struct lh7a40x_ep *ep;
1217 struct lh7a40x_request *req;
1218 unsigned long flags;
1219
1220 DEBUG("%s, %p\n", __FUNCTION__, _ep);
1221
1222 ep = container_of(_ep, struct lh7a40x_ep, ep);
1223 if (!_ep || ep->ep.name == ep0name)
1224 return -EINVAL;
1225
1226 spin_lock_irqsave(&ep->dev->lock, flags);
1227
1228 /* make sure it's actually queued on this endpoint */
1229 list_for_each_entry(req, &ep->queue, queue) {
1230 if (&req->req == _req)
1231 break;
1232 }
1233 if (&req->req != _req) {
1234 spin_unlock_irqrestore(&ep->dev->lock, flags);
1235 return -EINVAL;
1236 }
1237
1238 done(ep, req, -ECONNRESET);
1239
1240 spin_unlock_irqrestore(&ep->dev->lock, flags);
1241 return 0;
1242 }
1243
1244 /** Halt specific EP
1245 * Return 0 if success
1246 * NOTE: Sets INDEX register to EP !
1247 */
1248 static int lh7a40x_set_halt(struct usb_ep *_ep, int value)
1249 {
1250 struct lh7a40x_ep *ep;
1251 unsigned long flags;
1252
1253 ep = container_of(_ep, struct lh7a40x_ep, ep);
1254 if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1255 DEBUG("%s, bad ep\n", __FUNCTION__);
1256 return -EINVAL;
1257 }
1258
1259 usb_set_index(ep_index(ep));
1260
1261 DEBUG("%s, ep %d, val %d\n", __FUNCTION__, ep_index(ep), value);
1262
1263 spin_lock_irqsave(&ep->dev->lock, flags);
1264
1265 if (ep_index(ep) == 0) {
1266 /* EP0 */
1267 usb_set(EP0_SEND_STALL, ep->csr1);
1268 } else if (ep_is_in(ep)) {
1269 u32 csr = usb_read(ep->csr1);
1270 if (value && ((csr & USB_IN_CSR1_FIFO_NOT_EMPTY)
1271 || !list_empty(&ep->queue))) {
1272 /*
1273 * Attempts to halt IN endpoints will fail (returning -EAGAIN)
1274 * if any transfer requests are still queued, or if the controller
1275 * FIFO still holds bytes that the host hasn’t collected.
1276 */
1277 spin_unlock_irqrestore(&ep->dev->lock, flags);
1278 DEBUG
1279 ("Attempt to halt IN endpoint failed (returning -EAGAIN) %d %d\n",
1280 (csr & USB_IN_CSR1_FIFO_NOT_EMPTY),
1281 !list_empty(&ep->queue));
1282 return -EAGAIN;
1283 }
1284 flush(ep);
1285 if (value)
1286 usb_set(USB_IN_CSR1_SEND_STALL, ep->csr1);
1287 else {
1288 usb_clear(USB_IN_CSR1_SEND_STALL, ep->csr1);
1289 usb_set(USB_IN_CSR1_CLR_DATA_TOGGLE, ep->csr1);
1290 }
1291
1292 } else {
1293
1294 flush(ep);
1295 if (value)
1296 usb_set(USB_OUT_CSR1_SEND_STALL, ep->csr1);
1297 else {
1298 usb_clear(USB_OUT_CSR1_SEND_STALL, ep->csr1);
1299 usb_set(USB_OUT_CSR1_CLR_DATA_REG, ep->csr1);
1300 }
1301 }
1302
1303 if (value) {
1304 ep->stopped = 1;
1305 } else {
1306 ep->stopped = 0;
1307 }
1308
1309 spin_unlock_irqrestore(&ep->dev->lock, flags);
1310
1311 DEBUG("%s %s halted\n", _ep->name, value == 0 ? "NOT" : "IS");
1312
1313 return 0;
1314 }
1315
1316 /** Return bytes in EP FIFO
1317 * NOTE: Sets INDEX register to EP
1318 */
1319 static int lh7a40x_fifo_status(struct usb_ep *_ep)
1320 {
1321 u32 csr;
1322 int count = 0;
1323 struct lh7a40x_ep *ep;
1324
1325 ep = container_of(_ep, struct lh7a40x_ep, ep);
1326 if (!_ep) {
1327 DEBUG("%s, bad ep\n", __FUNCTION__);
1328 return -ENODEV;
1329 }
1330
1331 DEBUG("%s, %d\n", __FUNCTION__, ep_index(ep));
1332
1333 /* LPD can't report unclaimed bytes from IN fifos */
1334 if (ep_is_in(ep))
1335 return -EOPNOTSUPP;
1336
1337 usb_set_index(ep_index(ep));
1338
1339 csr = usb_read(ep->csr1);
1340 if (ep->dev->gadget.speed != USB_SPEED_UNKNOWN ||
1341 csr & USB_OUT_CSR1_OUT_PKT_RDY) {
1342 count = usb_read(USB_OUT_FIFO_WC1);
1343 }
1344
1345 return count;
1346 }
1347
1348 /** Flush EP FIFO
1349 * NOTE: Sets INDEX register to EP
1350 */
1351 static void lh7a40x_fifo_flush(struct usb_ep *_ep)
1352 {
1353 struct lh7a40x_ep *ep;
1354
1355 ep = container_of(_ep, struct lh7a40x_ep, ep);
1356 if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1357 DEBUG("%s, bad ep\n", __FUNCTION__);
1358 return;
1359 }
1360
1361 usb_set_index(ep_index(ep));
1362 flush(ep);
1363 }
1364
1365 /****************************************************************/
1366 /* End Point 0 related functions */
1367 /****************************************************************/
1368
1369 /* return: 0 = still running, 1 = completed, negative = errno */
1370 static int write_fifo_ep0(struct lh7a40x_ep *ep, struct lh7a40x_request *req)
1371 {
1372 u32 max;
1373 unsigned count;
1374 int is_last;
1375
1376 max = ep_maxpacket(ep);
1377
1378 DEBUG_EP0("%s\n", __FUNCTION__);
1379
1380 count = write_packet(ep, req, max);
1381
1382 /* last packet is usually short (or a zlp) */
1383 if (unlikely(count != max))
1384 is_last = 1;
1385 else {
1386 if (likely(req->req.length != req->req.actual) || req->req.zero)
1387 is_last = 0;
1388 else
1389 is_last = 1;
1390 }
1391
1392 DEBUG_EP0("%s: wrote %s %d bytes%s %d left %p\n", __FUNCTION__,
1393 ep->ep.name, count,
1394 is_last ? "/L" : "", req->req.length - req->req.actual, req);
1395
1396 /* requests complete when all IN data is in the FIFO */
1397 if (is_last) {
1398 done(ep, req, 0);
1399 return 1;
1400 }
1401
1402 return 0;
1403 }
1404
1405 static __inline__ int lh7a40x_fifo_read(struct lh7a40x_ep *ep,
1406 unsigned char *cp, int max)
1407 {
1408 int bytes;
1409 int count = usb_read(USB_OUT_FIFO_WC1);
1410 volatile u32 *fifo = (volatile u32 *)ep->fifo;
1411
1412 if (count > max)
1413 count = max;
1414 bytes = count;
1415 while (count--)
1416 *cp++ = *fifo & 0xFF;
1417 return bytes;
1418 }
1419
1420 static __inline__ void lh7a40x_fifo_write(struct lh7a40x_ep *ep,
1421 unsigned char *cp, int count)
1422 {
1423 volatile u32 *fifo = (volatile u32 *)ep->fifo;
1424 DEBUG_EP0("fifo_write: %d %d\n", ep_index(ep), count);
1425 while (count--)
1426 *fifo = *cp++;
1427 }
1428
1429 static int read_fifo_ep0(struct lh7a40x_ep *ep, struct lh7a40x_request *req)
1430 {
1431 u32 csr;
1432 u8 *buf;
1433 unsigned bufferspace, count, is_short;
1434 volatile u32 *fifo = (volatile u32 *)ep->fifo;
1435
1436 DEBUG_EP0("%s\n", __FUNCTION__);
1437
1438 csr = usb_read(USB_EP0_CSR);
1439 if (!(csr & USB_OUT_CSR1_OUT_PKT_RDY))
1440 return 0;
1441
1442 buf = req->req.buf + req->req.actual;
1443 prefetchw(buf);
1444 bufferspace = req->req.length - req->req.actual;
1445
1446 /* read all bytes from this packet */
1447 if (likely(csr & EP0_OUT_PKT_RDY)) {
1448 count = usb_read(USB_OUT_FIFO_WC1);
1449 req->req.actual += min(count, bufferspace);
1450 } else /* zlp */
1451 count = 0;
1452
1453 is_short = (count < ep->ep.maxpacket);
1454 DEBUG_EP0("read %s %02x, %d bytes%s req %p %d/%d\n",
1455 ep->ep.name, csr, count,
1456 is_short ? "/S" : "", req, req->req.actual, req->req.length);
1457
1458 while (likely(count-- != 0)) {
1459 u8 byte = (u8) (*fifo & 0xff);
1460
1461 if (unlikely(bufferspace == 0)) {
1462 /* this happens when the driver's buffer
1463 * is smaller than what the host sent.
1464 * discard the extra data.
1465 */
1466 if (req->req.status != -EOVERFLOW)
1467 DEBUG_EP0("%s overflow %d\n", ep->ep.name,
1468 count);
1469 req->req.status = -EOVERFLOW;
1470 } else {
1471 *buf++ = byte;
1472 bufferspace--;
1473 }
1474 }
1475
1476 /* completion */
1477 if (is_short || req->req.actual == req->req.length) {
1478 done(ep, req, 0);
1479 return 1;
1480 }
1481
1482 /* finished that packet. the next one may be waiting... */
1483 return 0;
1484 }
1485
1486 /**
1487 * udc_set_address - set the USB address for this device
1488 * @address:
1489 *
1490 * Called from control endpoint function after it decodes a set address setup packet.
1491 */
1492 static void udc_set_address(struct lh7a40x_udc *dev, unsigned char address)
1493 {
1494 DEBUG_EP0("%s: %d\n", __FUNCTION__, address);
1495 /* c.f. 15.1.2.2 Table 15-4 address will be used after DATA_END is set */
1496 dev->usb_address = address;
1497 usb_set((address & USB_FA_FUNCTION_ADDR), USB_FA);
1498 usb_set(USB_FA_ADDR_UPDATE | (address & USB_FA_FUNCTION_ADDR), USB_FA);
1499 /* usb_read(USB_FA); */
1500 }
1501
1502 /*
1503 * DATA_STATE_RECV (OUT_PKT_RDY)
1504 * - if error
1505 * set EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL bits
1506 * - else
1507 * set EP0_CLR_OUT bit
1508 if last set EP0_DATA_END bit
1509 */
1510 static void lh7a40x_ep0_out(struct lh7a40x_udc *dev, u32 csr)
1511 {
1512 struct lh7a40x_request *req;
1513 struct lh7a40x_ep *ep = &dev->ep[0];
1514 int ret;
1515
1516 DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
1517
1518 if (list_empty(&ep->queue))
1519 req = 0;
1520 else
1521 req = list_entry(ep->queue.next, struct lh7a40x_request, queue);
1522
1523 if (req) {
1524
1525 if (req->req.length == 0) {
1526 DEBUG_EP0("ZERO LENGTH OUT!\n");
1527 usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR);
1528 dev->ep0state = WAIT_FOR_SETUP;
1529 return;
1530 }
1531 ret = read_fifo_ep0(ep, req);
1532 if (ret) {
1533 /* Done! */
1534 DEBUG_EP0("%s: finished, waiting for status\n",
1535 __FUNCTION__);
1536
1537 usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR);
1538 dev->ep0state = WAIT_FOR_SETUP;
1539 } else {
1540 /* Not done yet.. */
1541 DEBUG_EP0("%s: not finished\n", __FUNCTION__);
1542 usb_set(EP0_CLR_OUT, USB_EP0_CSR);
1543 }
1544 } else {
1545 DEBUG_EP0("NO REQ??!\n");
1546 }
1547 }
1548
1549 /*
1550 * DATA_STATE_XMIT
1551 */
1552 static int lh7a40x_ep0_in(struct lh7a40x_udc *dev, u32 csr)
1553 {
1554 struct lh7a40x_request *req;
1555 struct lh7a40x_ep *ep = &dev->ep[0];
1556 int ret, need_zlp = 0;
1557
1558 DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
1559
1560 if (list_empty(&ep->queue))
1561 req = 0;
1562 else
1563 req = list_entry(ep->queue.next, struct lh7a40x_request, queue);
1564
1565 if (!req) {
1566 DEBUG_EP0("%s: NULL REQ\n", __FUNCTION__);
1567 return 0;
1568 }
1569
1570 if (req->req.length == 0) {
1571
1572 usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1573 dev->ep0state = WAIT_FOR_SETUP;
1574 return 1;
1575 }
1576
1577 if (req->req.length - req->req.actual == EP0_PACKETSIZE) {
1578 /* Next write will end with the packet size, */
1579 /* so we need Zero-length-packet */
1580 need_zlp = 1;
1581 }
1582
1583 ret = write_fifo_ep0(ep, req);
1584
1585 if (ret == 1 && !need_zlp) {
1586 /* Last packet */
1587 DEBUG_EP0("%s: finished, waiting for status\n", __FUNCTION__);
1588
1589 usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1590 dev->ep0state = WAIT_FOR_SETUP;
1591 } else {
1592 DEBUG_EP0("%s: not finished\n", __FUNCTION__);
1593 usb_set(EP0_IN_PKT_RDY, USB_EP0_CSR);
1594 }
1595
1596 if (need_zlp) {
1597 DEBUG_EP0("%s: Need ZLP!\n", __FUNCTION__);
1598 usb_set(EP0_IN_PKT_RDY, USB_EP0_CSR);
1599 dev->ep0state = DATA_STATE_NEED_ZLP;
1600 }
1601
1602 return 1;
1603 }
1604
1605 static int lh7a40x_handle_get_status(struct lh7a40x_udc *dev,
1606 struct usb_ctrlrequest *ctrl)
1607 {
1608 struct lh7a40x_ep *ep0 = &dev->ep[0];
1609 struct lh7a40x_ep *qep;
1610 int reqtype = (ctrl->bRequestType & USB_RECIP_MASK);
1611 u16 val = 0;
1612
1613 if (reqtype == USB_RECIP_INTERFACE) {
1614 /* This is not supported.
1615 * And according to the USB spec, this one does nothing..
1616 * Just return 0
1617 */
1618 DEBUG_SETUP("GET_STATUS: USB_RECIP_INTERFACE\n");
1619 } else if (reqtype == USB_RECIP_DEVICE) {
1620 DEBUG_SETUP("GET_STATUS: USB_RECIP_DEVICE\n");
1621 val |= (1 << 0); /* Self powered */
1622 /*val |= (1<<1); *//* Remote wakeup */
1623 } else if (reqtype == USB_RECIP_ENDPOINT) {
1624 int ep_num = (ctrl->wIndex & ~USB_DIR_IN);
1625
1626 DEBUG_SETUP
1627 ("GET_STATUS: USB_RECIP_ENDPOINT (%d), ctrl->wLength = %d\n",
1628 ep_num, ctrl->wLength);
1629
1630 if (ctrl->wLength > 2 || ep_num > 3)
1631 return -EOPNOTSUPP;
1632
1633 qep = &dev->ep[ep_num];
1634 if (ep_is_in(qep) != ((ctrl->wIndex & USB_DIR_IN) ? 1 : 0)
1635 && ep_index(qep) != 0) {
1636 return -EOPNOTSUPP;
1637 }
1638
1639 usb_set_index(ep_index(qep));
1640
1641 /* Return status on next IN token */
1642 switch (qep->ep_type) {
1643 case ep_control:
1644 val =
1645 (usb_read(qep->csr1) & EP0_SEND_STALL) ==
1646 EP0_SEND_STALL;
1647 break;
1648 case ep_bulk_in:
1649 case ep_interrupt:
1650 val =
1651 (usb_read(qep->csr1) & USB_IN_CSR1_SEND_STALL) ==
1652 USB_IN_CSR1_SEND_STALL;
1653 break;
1654 case ep_bulk_out:
1655 val =
1656 (usb_read(qep->csr1) & USB_OUT_CSR1_SEND_STALL) ==
1657 USB_OUT_CSR1_SEND_STALL;
1658 break;
1659 }
1660
1661 /* Back to EP0 index */
1662 usb_set_index(0);
1663
1664 DEBUG_SETUP("GET_STATUS, ep: %d (%x), val = %d\n", ep_num,
1665 ctrl->wIndex, val);
1666 } else {
1667 DEBUG_SETUP("Unknown REQ TYPE: %d\n", reqtype);
1668 return -EOPNOTSUPP;
1669 }
1670
1671 /* Clear "out packet ready" */
1672 usb_set((EP0_CLR_OUT), USB_EP0_CSR);
1673 /* Put status to FIFO */
1674 lh7a40x_fifo_write(ep0, (u8 *) & val, sizeof(val));
1675 /* Issue "In packet ready" */
1676 usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1677
1678 return 0;
1679 }
1680
1681 /*
1682 * WAIT_FOR_SETUP (OUT_PKT_RDY)
1683 * - read data packet from EP0 FIFO
1684 * - decode command
1685 * - if error
1686 * set EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL bits
1687 * - else
1688 * set EP0_CLR_OUT | EP0_DATA_END bits
1689 */
1690 static void lh7a40x_ep0_setup(struct lh7a40x_udc *dev, u32 csr)
1691 {
1692 struct lh7a40x_ep *ep = &dev->ep[0];
1693 struct usb_ctrlrequest ctrl;
1694 int i, bytes, is_in;
1695
1696 DEBUG_SETUP("%s: %x\n", __FUNCTION__, csr);
1697
1698 /* Nuke all previous transfers */
1699 nuke(ep, -EPROTO);
1700
1701 /* read control req from fifo (8 bytes) */
1702 bytes = lh7a40x_fifo_read(ep, (unsigned char *)&ctrl, 8);
1703
1704 DEBUG_SETUP("Read CTRL REQ %d bytes\n", bytes);
1705 DEBUG_SETUP("CTRL.bRequestType = %d (is_in %d)\n", ctrl.bRequestType,
1706 ctrl.bRequestType == USB_DIR_IN);
1707 DEBUG_SETUP("CTRL.bRequest = %d\n", ctrl.bRequest);
1708 DEBUG_SETUP("CTRL.wLength = %d\n", ctrl.wLength);
1709 DEBUG_SETUP("CTRL.wValue = %d (%d)\n", ctrl.wValue, ctrl.wValue >> 8);
1710 DEBUG_SETUP("CTRL.wIndex = %d\n", ctrl.wIndex);
1711
1712 /* Set direction of EP0 */
1713 if (likely(ctrl.bRequestType & USB_DIR_IN)) {
1714 ep->bEndpointAddress |= USB_DIR_IN;
1715 is_in = 1;
1716 } else {
1717 ep->bEndpointAddress &= ~USB_DIR_IN;
1718 is_in = 0;
1719 }
1720
1721 dev->req_pending = 1;
1722
1723 /* Handle some SETUP packets ourselves */
1724 switch (ctrl.bRequest) {
1725 case USB_REQ_SET_ADDRESS:
1726 if (ctrl.bRequestType != (USB_TYPE_STANDARD | USB_RECIP_DEVICE))
1727 break;
1728
1729 DEBUG_SETUP("USB_REQ_SET_ADDRESS (%d)\n", ctrl.wValue);
1730 udc_set_address(dev, ctrl.wValue);
1731 usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR);
1732 return;
1733
1734 case USB_REQ_GET_STATUS:{
1735 if (lh7a40x_handle_get_status(dev, &ctrl) == 0)
1736 return;
1737
1738 case USB_REQ_CLEAR_FEATURE:
1739 case USB_REQ_SET_FEATURE:
1740 if (ctrl.bRequestType == USB_RECIP_ENDPOINT) {
1741 struct lh7a40x_ep *qep;
1742 int ep_num = (ctrl.wIndex & 0x0f);
1743
1744 /* Support only HALT feature */
1745 if (ctrl.wValue != 0 || ctrl.wLength != 0
1746 || ep_num > 3 || ep_num < 1)
1747 break;
1748
1749 qep = &dev->ep[ep_num];
1750 spin_unlock(&dev->lock);
1751 if (ctrl.bRequest == USB_REQ_SET_FEATURE) {
1752 DEBUG_SETUP("SET_FEATURE (%d)\n",
1753 ep_num);
1754 lh7a40x_set_halt(&qep->ep, 1);
1755 } else {
1756 DEBUG_SETUP("CLR_FEATURE (%d)\n",
1757 ep_num);
1758 lh7a40x_set_halt(&qep->ep, 0);
1759 }
1760 spin_lock(&dev->lock);
1761 usb_set_index(0);
1762
1763 /* Reply with a ZLP on next IN token */
1764 usb_set((EP0_CLR_OUT | EP0_DATA_END),
1765 USB_EP0_CSR);
1766 return;
1767 }
1768 break;
1769 }
1770
1771 default:
1772 break;
1773 }
1774
1775 if (likely(dev->driver)) {
1776 /* device-2-host (IN) or no data setup command, process immediately */
1777 spin_unlock(&dev->lock);
1778 i = dev->driver->setup(&dev->gadget, &ctrl);
1779 spin_lock(&dev->lock);
1780
1781 if (i < 0) {
1782 /* setup processing failed, force stall */
1783 DEBUG_SETUP
1784 (" --> ERROR: gadget setup FAILED (stalling), setup returned %d\n",
1785 i);
1786 usb_set_index(0);
1787 usb_set((EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL),
1788 USB_EP0_CSR);
1789
1790 /* ep->stopped = 1; */
1791 dev->ep0state = WAIT_FOR_SETUP;
1792 }
1793 }
1794 }
1795
1796 /*
1797 * DATA_STATE_NEED_ZLP
1798 */
1799 static void lh7a40x_ep0_in_zlp(struct lh7a40x_udc *dev, u32 csr)
1800 {
1801 DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
1802
1803 /* c.f. Table 15-14 */
1804 usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1805 dev->ep0state = WAIT_FOR_SETUP;
1806 }
1807
1808 /*
1809 * handle ep0 interrupt
1810 */
1811 static void lh7a40x_handle_ep0(struct lh7a40x_udc *dev, u32 intr)
1812 {
1813 struct lh7a40x_ep *ep = &dev->ep[0];
1814 u32 csr;
1815
1816 /* Set index 0 */
1817 usb_set_index(0);
1818 csr = usb_read(USB_EP0_CSR);
1819
1820 DEBUG_EP0("%s: csr = %x\n", __FUNCTION__, csr);
1821
1822 /*
1823 * For overview of what we should be doing see c.f. Chapter 18.1.2.4
1824 * We will follow that outline here modified by our own global state
1825 * indication which provides hints as to what we think should be
1826 * happening..
1827 */
1828
1829 /*
1830 * if SENT_STALL is set
1831 * - clear the SENT_STALL bit
1832 */
1833 if (csr & EP0_SENT_STALL) {
1834 DEBUG_EP0("%s: EP0_SENT_STALL is set: %x\n", __FUNCTION__, csr);
1835 usb_clear((EP0_SENT_STALL | EP0_SEND_STALL), USB_EP0_CSR);
1836 nuke(ep, -ECONNABORTED);
1837 dev->ep0state = WAIT_FOR_SETUP;
1838 return;
1839 }
1840
1841 /*
1842 * if a transfer is in progress && IN_PKT_RDY and OUT_PKT_RDY are clear
1843 * - fill EP0 FIFO
1844 * - if last packet
1845 * - set IN_PKT_RDY | DATA_END
1846 * - else
1847 * set IN_PKT_RDY
1848 */
1849 if (!(csr & (EP0_IN_PKT_RDY | EP0_OUT_PKT_RDY))) {
1850 DEBUG_EP0("%s: IN_PKT_RDY and OUT_PKT_RDY are clear\n",
1851 __FUNCTION__);
1852
1853 switch (dev->ep0state) {
1854 case DATA_STATE_XMIT:
1855 DEBUG_EP0("continue with DATA_STATE_XMIT\n");
1856 lh7a40x_ep0_in(dev, csr);
1857 return;
1858 case DATA_STATE_NEED_ZLP:
1859 DEBUG_EP0("continue with DATA_STATE_NEED_ZLP\n");
1860 lh7a40x_ep0_in_zlp(dev, csr);
1861 return;
1862 default:
1863 /* Stall? */
1864 DEBUG_EP0("Odd state!! state = %s\n",
1865 state_names[dev->ep0state]);
1866 dev->ep0state = WAIT_FOR_SETUP;
1867 /* nuke(ep, 0); */
1868 /* usb_set(EP0_SEND_STALL, ep->csr1); */
1869 break;
1870 }
1871 }
1872
1873 /*
1874 * if SETUP_END is set
1875 * - abort the last transfer
1876 * - set SERVICED_SETUP_END_BIT
1877 */
1878 if (csr & EP0_SETUP_END) {
1879 DEBUG_EP0("%s: EP0_SETUP_END is set: %x\n", __FUNCTION__, csr);
1880
1881 usb_set(EP0_CLR_SETUP_END, USB_EP0_CSR);
1882
1883 nuke(ep, 0);
1884 dev->ep0state = WAIT_FOR_SETUP;
1885 }
1886
1887 /*
1888 * if EP0_OUT_PKT_RDY is set
1889 * - read data packet from EP0 FIFO
1890 * - decode command
1891 * - if error
1892 * set SERVICED_OUT_PKT_RDY | DATA_END bits | SEND_STALL
1893 * - else
1894 * set SERVICED_OUT_PKT_RDY | DATA_END bits
1895 */
1896 if (csr & EP0_OUT_PKT_RDY) {
1897
1898 DEBUG_EP0("%s: EP0_OUT_PKT_RDY is set: %x\n", __FUNCTION__,
1899 csr);
1900
1901 switch (dev->ep0state) {
1902 case WAIT_FOR_SETUP:
1903 DEBUG_EP0("WAIT_FOR_SETUP\n");
1904 lh7a40x_ep0_setup(dev, csr);
1905 break;
1906
1907 case DATA_STATE_RECV:
1908 DEBUG_EP0("DATA_STATE_RECV\n");
1909 lh7a40x_ep0_out(dev, csr);
1910 break;
1911
1912 default:
1913 /* send stall? */
1914 DEBUG_EP0("strange state!! 2. send stall? state = %d\n",
1915 dev->ep0state);
1916 break;
1917 }
1918 }
1919 }
1920
1921 static void lh7a40x_ep0_kick(struct lh7a40x_udc *dev, struct lh7a40x_ep *ep)
1922 {
1923 u32 csr;
1924
1925 usb_set_index(0);
1926 csr = usb_read(USB_EP0_CSR);
1927
1928 DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
1929
1930 /* Clear "out packet ready" */
1931 usb_set(EP0_CLR_OUT, USB_EP0_CSR);
1932
1933 if (ep_is_in(ep)) {
1934 dev->ep0state = DATA_STATE_XMIT;
1935 lh7a40x_ep0_in(dev, csr);
1936 } else {
1937 dev->ep0state = DATA_STATE_RECV;
1938 lh7a40x_ep0_out(dev, csr);
1939 }
1940 }
1941
1942 /* ---------------------------------------------------------------------------
1943 * device-scoped parts of the api to the usb controller hardware
1944 * ---------------------------------------------------------------------------
1945 */
1946
1947 static int lh7a40x_udc_get_frame(struct usb_gadget *_gadget)
1948 {
1949 u32 frame1 = usb_read(USB_FRM_NUM1); /* Least significant 8 bits */
1950 u32 frame2 = usb_read(USB_FRM_NUM2); /* Most significant 3 bits */
1951 DEBUG("%s, %p\n", __FUNCTION__, _gadget);
1952 return ((frame2 & 0x07) << 8) | (frame1 & 0xff);
1953 }
1954
1955 static int lh7a40x_udc_wakeup(struct usb_gadget *_gadget)
1956 {
1957 /* host may not have enabled remote wakeup */
1958 /*if ((UDCCS0 & UDCCS0_DRWF) == 0)
1959 return -EHOSTUNREACH;
1960 udc_set_mask_UDCCR(UDCCR_RSM); */
1961 return -ENOTSUPP;
1962 }
1963
1964 static const struct usb_gadget_ops lh7a40x_udc_ops = {
1965 .get_frame = lh7a40x_udc_get_frame,
1966 .wakeup = lh7a40x_udc_wakeup,
1967 /* current versions must always be self-powered */
1968 };
1969
1970 static void nop_release(struct device *dev)
1971 {
1972 DEBUG("%s %s\n", __FUNCTION__, dev->bus_id);
1973 }
1974
1975 static struct lh7a40x_udc memory = {
1976 .usb_address = 0,
1977
1978 .gadget = {
1979 .ops = &lh7a40x_udc_ops,
1980 .ep0 = &memory.ep[0].ep,
1981 .name = driver_name,
1982 .dev = {
1983 .bus_id = "gadget",
1984 .release = nop_release,
1985 },
1986 },
1987
1988 /* control endpoint */
1989 .ep[0] = {
1990 .ep = {
1991 .name = ep0name,
1992 .ops = &lh7a40x_ep_ops,
1993 .maxpacket = EP0_PACKETSIZE,
1994 },
1995 .dev = &memory,
1996
1997 .bEndpointAddress = 0,
1998 .bmAttributes = 0,
1999
2000 .ep_type = ep_control,
2001 .fifo = io_p2v(USB_EP0_FIFO),
2002 .csr1 = USB_EP0_CSR,
2003 .csr2 = USB_EP0_CSR,
2004 },
2005
2006 /* first group of endpoints */
2007 .ep[1] = {
2008 .ep = {
2009 .name = "ep1in-bulk",
2010 .ops = &lh7a40x_ep_ops,
2011 .maxpacket = 64,
2012 },
2013 .dev = &memory,
2014
2015 .bEndpointAddress = USB_DIR_IN | 1,
2016 .bmAttributes = USB_ENDPOINT_XFER_BULK,
2017
2018 .ep_type = ep_bulk_in,
2019 .fifo = io_p2v(USB_EP1_FIFO),
2020 .csr1 = USB_IN_CSR1,
2021 .csr2 = USB_IN_CSR2,
2022 },
2023
2024 .ep[2] = {
2025 .ep = {
2026 .name = "ep2out-bulk",
2027 .ops = &lh7a40x_ep_ops,
2028 .maxpacket = 64,
2029 },
2030 .dev = &memory,
2031
2032 .bEndpointAddress = 2,
2033 .bmAttributes = USB_ENDPOINT_XFER_BULK,
2034
2035 .ep_type = ep_bulk_out,
2036 .fifo = io_p2v(USB_EP2_FIFO),
2037 .csr1 = USB_OUT_CSR1,
2038 .csr2 = USB_OUT_CSR2,
2039 },
2040
2041 .ep[3] = {
2042 .ep = {
2043 .name = "ep3in-int",
2044 .ops = &lh7a40x_ep_ops,
2045 .maxpacket = 64,
2046 },
2047 .dev = &memory,
2048
2049 .bEndpointAddress = USB_DIR_IN | 3,
2050 .bmAttributes = USB_ENDPOINT_XFER_INT,
2051
2052 .ep_type = ep_interrupt,
2053 .fifo = io_p2v(USB_EP3_FIFO),
2054 .csr1 = USB_IN_CSR1,
2055 .csr2 = USB_IN_CSR2,
2056 },
2057 };
2058
2059 /*
2060 * probe - binds to the platform device
2061 */
2062 static int lh7a40x_udc_probe(struct platform_device *pdev)
2063 {
2064 struct lh7a40x_udc *dev = &memory;
2065 int retval;
2066
2067 DEBUG("%s: %p\n", __FUNCTION__, pdev);
2068
2069 spin_lock_init(&dev->lock);
2070 dev->dev = &pdev->dev;
2071
2072 device_initialize(&dev->gadget.dev);
2073 dev->gadget.dev.parent = &pdev->dev;
2074
2075 the_controller = dev;
2076 platform_set_drvdata(pdev, dev);
2077
2078 udc_disable(dev);
2079 udc_reinit(dev);
2080
2081 /* irq setup after old hardware state is cleaned up */
2082 retval =
2083 request_irq(IRQ_USBINTR, lh7a40x_udc_irq, IRQF_DISABLED, driver_name,
2084 dev);
2085 if (retval != 0) {
2086 DEBUG(KERN_ERR "%s: can't get irq %i, err %d\n", driver_name,
2087 IRQ_USBINTR, retval);
2088 return -EBUSY;
2089 }
2090
2091 create_proc_files();
2092
2093 return retval;
2094 }
2095
2096 static int lh7a40x_udc_remove(struct platform_device *pdev)
2097 {
2098 struct lh7a40x_udc *dev = platform_get_drvdata(pdev);
2099
2100 DEBUG("%s: %p\n", __FUNCTION__, pdev);
2101
2102 if (dev->driver)
2103 return -EBUSY;
2104
2105 udc_disable(dev);
2106 remove_proc_files();
2107
2108 free_irq(IRQ_USBINTR, dev);
2109
2110 platform_set_drvdata(pdev, 0);
2111
2112 the_controller = 0;
2113
2114 return 0;
2115 }
2116
2117 /*-------------------------------------------------------------------------*/
2118
2119 static struct platform_driver udc_driver = {
2120 .probe = lh7a40x_udc_probe,
2121 .remove = lh7a40x_udc_remove,
2122 /* FIXME power management support */
2123 /* .suspend = ... disable UDC */
2124 /* .resume = ... re-enable UDC */
2125 .driver = {
2126 .name = (char *)driver_name,
2127 .owner = THIS_MODULE,
2128 },
2129 };
2130
2131 static int __init udc_init(void)
2132 {
2133 DEBUG("%s: %s version %s\n", __FUNCTION__, driver_name, DRIVER_VERSION);
2134 return platform_driver_register(&udc_driver);
2135 }
2136
2137 static void __exit udc_exit(void)
2138 {
2139 platform_driver_unregister(&udc_driver);
2140 }
2141
2142 module_init(udc_init);
2143 module_exit(udc_exit);
2144
2145 MODULE_DESCRIPTION(DRIVER_DESC);
2146 MODULE_AUTHOR("Mikko Lahteenmaki, Bo Henriksen");
2147 MODULE_LICENSE("GPL");
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