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[PATCH] USB: Spelling fixes for drivers/usb.
[deliverable/linux.git] / drivers / usb / gadget / lh7a40x_udc.c
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1da177e4
LT		 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 "lh7a40x_udc.h"
25
26//#define DEBUG printk
27//#define DEBUG_EP0 printk
28//#define DEBUG_SETUP printk
29
30#ifndef DEBUG_EP0
31# define DEBUG_EP0(fmt,args...)
32#endif
33#ifndef DEBUG_SETUP
34# define DEBUG_SETUP(fmt,args...)
35#endif
36#ifndef DEBUG
37# define NO_STATES
38# define DEBUG(fmt,args...)
39#endif
40
41#define DRIVER_DESC "LH7A40x USB Device Controller"
42#define DRIVER_VERSION __DATE__
43
44#ifndef _BIT /* FIXME - what happended to _BIT in 2.6.7bk18? */
45#define _BIT(x) (1<<(x))
46#endif
47
48struct lh7a40x_udc *the_controller;
49
50static const char driver_name[] = "lh7a40x_udc";
51static const char driver_desc[] = DRIVER_DESC;
52static const char ep0name[] = "ep0-control";
53
54/*
55 Local definintions.
56*/
57
58#ifndef NO_STATES
59static char *state_names[] = {
60 "WAIT_FOR_SETUP",
61 "DATA_STATE_XMIT",
62 "DATA_STATE_NEED_ZLP",
63 "WAIT_FOR_OUT_STATUS",
64 "DATA_STATE_RECV"
65};
66#endif
67
68/*
69 Local declarations.
70*/
71static int lh7a40x_ep_enable(struct usb_ep *ep,
72 const struct usb_endpoint_descriptor *);
73static int lh7a40x_ep_disable(struct usb_ep *ep);
74static struct usb_request *lh7a40x_alloc_request(struct usb_ep *ep, int);
75static void lh7a40x_free_request(struct usb_ep *ep, struct usb_request *);
76static void *lh7a40x_alloc_buffer(struct usb_ep *ep, unsigned, dma_addr_t *,
77 int);
78static void lh7a40x_free_buffer(struct usb_ep *ep, void *, dma_addr_t,
79 unsigned);
80static int lh7a40x_queue(struct usb_ep *ep, struct usb_request *, int);
81static int lh7a40x_dequeue(struct usb_ep *ep, struct usb_request *);
82static int lh7a40x_set_halt(struct usb_ep *ep, int);
83static int lh7a40x_fifo_status(struct usb_ep *ep);
84static int lh7a40x_fifo_status(struct usb_ep *ep);
85static void lh7a40x_fifo_flush(struct usb_ep *ep);
86static void lh7a40x_ep0_kick(struct lh7a40x_udc *dev, struct lh7a40x_ep *ep);
87static void lh7a40x_handle_ep0(struct lh7a40x_udc *dev, u32 intr);
88
89static void done(struct lh7a40x_ep *ep, struct lh7a40x_request *req,
90 int status);
91static void pio_irq_enable(int bEndpointAddress);
92static void pio_irq_disable(int bEndpointAddress);
93static void stop_activity(struct lh7a40x_udc *dev,
94 struct usb_gadget_driver *driver);
95static void flush(struct lh7a40x_ep *ep);
96static void udc_enable(struct lh7a40x_udc *dev);
97static void udc_set_address(struct lh7a40x_udc *dev, unsigned char address);
98
99static struct usb_ep_ops lh7a40x_ep_ops = {
100 .enable = lh7a40x_ep_enable,
101 .disable = lh7a40x_ep_disable,
102
103 .alloc_request = lh7a40x_alloc_request,
104 .free_request = lh7a40x_free_request,
105
106 .alloc_buffer = lh7a40x_alloc_buffer,
107 .free_buffer = lh7a40x_free_buffer,
108
109 .queue = lh7a40x_queue,
110 .dequeue = lh7a40x_dequeue,
111
112 .set_halt = lh7a40x_set_halt,
113 .fifo_status = lh7a40x_fifo_status,
114 .fifo_flush = lh7a40x_fifo_flush,
115};
116
117/* Inline code */
118
119static __inline__ int write_packet(struct lh7a40x_ep *ep,
120 struct lh7a40x_request *req, int max)
121{
122 u8 *buf;
123 int length, count;
124 volatile u32 *fifo = (volatile u32 *)ep->fifo;
125
126 buf = req->req.buf + req->req.actual;
127 prefetch(buf);
128
129 length = req->req.length - req->req.actual;
130 length = min(length, max);
131 req->req.actual += length;
132
133 DEBUG("Write %d (max %d), fifo %p\n", length, max, fifo);
134
135 count = length;
136 while (count--) {
137 *fifo = *buf++;
138 }
139
140 return length;
141}
142
143static __inline__ void usb_set_index(u32 ep)
144{
145 *(volatile u32 *)io_p2v(USB_INDEX) = ep;
146}
147
148static __inline__ u32 usb_read(u32 port)
149{
150 return *(volatile u32 *)io_p2v(port);
151}
152
153static __inline__ void usb_write(u32 val, u32 port)
154{
155 *(volatile u32 *)io_p2v(port) = val;
156}
157
158static __inline__ void usb_set(u32 val, u32 port)
159{
160 volatile u32 *ioport = (volatile u32 *)io_p2v(port);
161 u32 after = (*ioport) | val;
162 *ioport = after;
163}
164
165static __inline__ void usb_clear(u32 val, u32 port)
166{
167 volatile u32 *ioport = (volatile u32 *)io_p2v(port);
168 u32 after = (*ioport) & ~val;
169 *ioport = after;
170}
171
172/*-------------------------------------------------------------------------*/
173
174#define GPIO_PORTC_DR (0x80000E08)
175#define GPIO_PORTC_DDR (0x80000E18)
176#define GPIO_PORTC_PDR (0x80000E70)
177
178/* get port C pin data register */
179#define get_portc_pdr(bit) ((usb_read(GPIO_PORTC_PDR) & _BIT(bit)) != 0)
180/* get port C data direction register */
181#define get_portc_ddr(bit) ((usb_read(GPIO_PORTC_DDR) & _BIT(bit)) != 0)
182/* set port C data register */
183#define set_portc_dr(bit, val) (val ? usb_set(_BIT(bit), GPIO_PORTC_DR) : usb_clear(_BIT(bit), GPIO_PORTC_DR))
184/* set port C data direction register */
185#define set_portc_ddr(bit, val) (val ? usb_set(_BIT(bit), GPIO_PORTC_DDR) : usb_clear(_BIT(bit), GPIO_PORTC_DDR))
186
187/*
188 * LPD7A404 GPIO's:
189 * Port C bit 1 = USB Port 1 Power Enable
190 * Port C bit 2 = USB Port 1 Data Carrier Detect
191 */
192#define is_usb_connected() get_portc_pdr(2)
193
194#ifdef CONFIG_USB_GADGET_DEBUG_FILES
195
196static const char proc_node_name[] = "driver/udc";
197
198static int
199udc_proc_read(char *page, char **start, off_t off, int count,
200 int *eof, void *_dev)
201{
202 char *buf = page;
203 struct lh7a40x_udc *dev = _dev;
204 char *next = buf;
205 unsigned size = count;
206 unsigned long flags;
207 int t;
208
209 if (off != 0)
210 return 0;
211
212 local_irq_save(flags);
213
214 /* basic device status */
215 t = scnprintf(next, size,
216 DRIVER_DESC "\n"
217 "%s version: %s\n"
218 "Gadget driver: %s\n"
219 "Host: %s\n\n",
220 driver_name, DRIVER_VERSION,
221 dev->driver ? dev->driver->driver.name : "(none)",
222 is_usb_connected()? "full speed" : "disconnected");
223 size -= t;
224 next += t;
225
226 t = scnprintf(next, size,
227 "GPIO:\n"
228 " Port C bit 1: %d, dir %d\n"
229 " Port C bit 2: %d, dir %d\n\n",
230 get_portc_pdr(1), get_portc_ddr(1),
231 get_portc_pdr(2), get_portc_ddr(2)
232 );
233 size -= t;
234 next += t;
235
236 t = scnprintf(next, size,
237 "DCP pullup: %d\n\n",
238 (usb_read(USB_PM) & PM_USB_DCP) != 0);
239 size -= t;
240 next += t;
241
242 local_irq_restore(flags);
243 *eof = 1;
244 return count - size;
245}
246
247#define create_proc_files() create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev)
248#define remove_proc_files() remove_proc_entry(proc_node_name, NULL)
249
250#else /* !CONFIG_USB_GADGET_DEBUG_FILES */
251
252#define create_proc_files() do {} while (0)
253#define remove_proc_files() do {} while (0)
254
255#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
256
257/*
258 * udc_disable - disable USB device controller
259 */
260static void udc_disable(struct lh7a40x_udc *dev)
261{
262 DEBUG("%s, %p\n", __FUNCTION__, dev);
263
264 udc_set_address(dev, 0);
265
266 /* Disable interrupts */
267 usb_write(0, USB_IN_INT_EN);
268 usb_write(0, USB_OUT_INT_EN);
269 usb_write(0, USB_INT_EN);
270
271 /* Disable the USB */
272 usb_write(0, USB_PM);
273
274#ifdef CONFIG_ARCH_LH7A404
275 /* Disable USB power */
276 set_portc_dr(1, 0);
277#endif
278
279 /* if hardware supports it, disconnect from usb */
280 /* make_usb_disappear(); */
281
282 dev->ep0state = WAIT_FOR_SETUP;
283 dev->gadget.speed = USB_SPEED_UNKNOWN;
284 dev->usb_address = 0;
285}
286
287/*
288 * udc_reinit - initialize software state
289 */
290static void udc_reinit(struct lh7a40x_udc *dev)
291{
292 u32 i;
293
294 DEBUG("%s, %p\n", __FUNCTION__, dev);
295
296 /* device/ep0 records init */
297 INIT_LIST_HEAD(&dev->gadget.ep_list);
298 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
299 dev->ep0state = WAIT_FOR_SETUP;
300
301 /* basic endpoint records init */
302 for (i = 0; i < UDC_MAX_ENDPOINTS; i++) {
303 struct lh7a40x_ep *ep = &dev->ep[i];
304
305 if (i != 0)
306 list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
307
308 ep->desc = 0;
309 ep->stopped = 0;
310 INIT_LIST_HEAD(&ep->queue);
311 ep->pio_irqs = 0;
312 }
313
314 /* the rest was statically initialized, and is read-only */
315}
316
317#define BYTES2MAXP(x) (x / 8)
318#define MAXP2BYTES(x) (x * 8)
319
320/* until it's enabled, this UDC should be completely invisible
321 * to any USB host.
322 */
323static void udc_enable(struct lh7a40x_udc *dev)
324{
325 int ep;
326
327 DEBUG("%s, %p\n", __FUNCTION__, dev);
328
329 dev->gadget.speed = USB_SPEED_UNKNOWN;
330
331#ifdef CONFIG_ARCH_LH7A404
332 /* Set Port C bit 1 & 2 as output */
333 set_portc_ddr(1, 1);
334 set_portc_ddr(2, 1);
335
336 /* Enable USB power */
337 set_portc_dr(1, 0);
338#endif
339
340 /*
341 * C.f Chapter 18.1.3.1 Initializing the USB
342 */
343
344 /* Disable the USB */
345 usb_clear(PM_USB_ENABLE, USB_PM);
346
347 /* Reset APB & I/O sides of the USB */
348 usb_set(USB_RESET_APB | USB_RESET_IO, USB_RESET);
349 mdelay(5);
350 usb_clear(USB_RESET_APB | USB_RESET_IO, USB_RESET);
351
352 /* Set MAXP values for each */
353 for (ep = 0; ep < UDC_MAX_ENDPOINTS; ep++) {
354 struct lh7a40x_ep *ep_reg = &dev->ep[ep];
355 u32 csr;
356
357 usb_set_index(ep);
358
359 switch (ep_reg->ep_type) {
360 case ep_bulk_in:
361 case ep_interrupt:
362 usb_clear(USB_IN_CSR2_USB_DMA_EN | USB_IN_CSR2_AUTO_SET,
363 ep_reg->csr2);
364 /* Fall through */
365 case ep_control:
366 usb_write(BYTES2MAXP(ep_maxpacket(ep_reg)),
367 USB_IN_MAXP);
368 break;
369 case ep_bulk_out:
370 usb_clear(USB_OUT_CSR2_USB_DMA_EN |
371 USB_OUT_CSR2_AUTO_CLR, ep_reg->csr2);
372 usb_write(BYTES2MAXP(ep_maxpacket(ep_reg)),
373 USB_OUT_MAXP);
374 break;
375 }
376
377 /* Read & Write CSR1, just in case */
378 csr = usb_read(ep_reg->csr1);
379 usb_write(csr, ep_reg->csr1);
380
381 flush(ep_reg);
382 }
383
384 /* Disable interrupts */
385 usb_write(0, USB_IN_INT_EN);
386 usb_write(0, USB_OUT_INT_EN);
387 usb_write(0, USB_INT_EN);
388
389 /* Enable interrupts */
390 usb_set(USB_IN_INT_EP0, USB_IN_INT_EN);
391 usb_set(USB_INT_RESET_INT | USB_INT_RESUME_INT, USB_INT_EN);
392 /* Dont enable rest of the interrupts */
393 /* usb_set(USB_IN_INT_EP3 | USB_IN_INT_EP1 | USB_IN_INT_EP0, USB_IN_INT_EN);
394 usb_set(USB_OUT_INT_EP2, USB_OUT_INT_EN); */
395
396 /* Enable SUSPEND */
397 usb_set(PM_ENABLE_SUSPEND, USB_PM);
398
399 /* Enable the USB */
400 usb_set(PM_USB_ENABLE, USB_PM);
401
402#ifdef CONFIG_ARCH_LH7A404
403 /* NOTE: DOES NOT WORK! */
404 /* Let host detect UDC:
405 * Software must write a 0 to the PMR:DCP_CTRL bit to turn this
406 * transistor on and pull the USBDP pin HIGH.
407 */
408 /* usb_clear(PM_USB_DCP, USB_PM);
409 usb_set(PM_USB_DCP, USB_PM); */
410#endif
411}
412
413/*
414 Register entry point for the peripheral controller driver.
415*/
416int usb_gadget_register_driver(struct usb_gadget_driver *driver)
417{
418 struct lh7a40x_udc *dev = the_controller;
419 int retval;
420
421 DEBUG("%s: %s\n", __FUNCTION__, driver->driver.name);
422
423 if (!driver
424 || driver->speed != USB_SPEED_FULL
425 || !driver->bind
426 || !driver->unbind || !driver->disconnect || !driver->setup)
427 return -EINVAL;
428 if (!dev)
429 return -ENODEV;
430 if (dev->driver)
431 return -EBUSY;
432
433 /* first hook up the driver ... */
434 dev->driver = driver;
435 dev->gadget.dev.driver = &driver->driver;
436
437 device_add(&dev->gadget.dev);
438 retval = driver->bind(&dev->gadget);
439 if (retval) {
440 printk("%s: bind to driver %s --> error %d\n", dev->gadget.name,
441 driver->driver.name, retval);
442 device_del(&dev->gadget.dev);
443
444 dev->driver = 0;
445 dev->gadget.dev.driver = 0;
446 return retval;
447 }
448
449 /* ... then enable host detection and ep0; and we're ready
450 * for set_configuration as well as eventual disconnect.
451 * NOTE: this shouldn't power up until later.
452 */
453 printk("%s: registered gadget driver '%s'\n", dev->gadget.name,
454 driver->driver.name);
455
456 udc_enable(dev);
457
458 return 0;
459}
460
461EXPORT_SYMBOL(usb_gadget_register_driver);
462
463/*
464 Unregister entry point for the peripheral controller driver.
465*/
466int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
467{
468 struct lh7a40x_udc *dev = the_controller;
469 unsigned long flags;
470
471 if (!dev)
472 return -ENODEV;
473 if (!driver || driver != dev->driver)
474 return -EINVAL;
475
476 spin_lock_irqsave(&dev->lock, flags);
477 dev->driver = 0;
478 stop_activity(dev, driver);
479 spin_unlock_irqrestore(&dev->lock, flags);
480
481 driver->unbind(&dev->gadget);
482 device_del(&dev->gadget.dev);
483
484 udc_disable(dev);
485
486 DEBUG("unregistered gadget driver '%s'\n", driver->driver.name);
487 return 0;
488}
489
490EXPORT_SYMBOL(usb_gadget_unregister_driver);
491
492/*-------------------------------------------------------------------------*/
493
494/** Write request to FIFO (max write == maxp size)
495 * Return: 0 = still running, 1 = completed, negative = errno
496 * NOTE: INDEX register must be set for EP
497 */
498static int write_fifo(struct lh7a40x_ep *ep, struct lh7a40x_request *req)
499{
500 u32 max;
501 u32 csr;
502
503 max = le16_to_cpu(ep->desc->wMaxPacketSize);
504
505 csr = usb_read(ep->csr1);
506 DEBUG("CSR: %x %d\n", csr, csr & USB_IN_CSR1_FIFO_NOT_EMPTY);
507
508 if (!(csr & USB_IN_CSR1_FIFO_NOT_EMPTY)) {
509 unsigned count;
510 int is_last, is_short;
511
512 count = write_packet(ep, req, max);
513 usb_set(USB_IN_CSR1_IN_PKT_RDY, ep->csr1);
514
515 /* last packet is usually short (or a zlp) */
516 if (unlikely(count != max))
517 is_last = is_short = 1;
518 else {
519 if (likely(req->req.length != req->req.actual)
520 || req->req.zero)
521 is_last = 0;
522 else
523 is_last = 1;
524 /* interrupt/iso maxpacket may not fill the fifo */
525 is_short = unlikely(max < ep_maxpacket(ep));
526 }
527
528 DEBUG("%s: wrote %s %d bytes%s%s %d left %p\n", __FUNCTION__,
529 ep->ep.name, count,
530 is_last ? "/L" : "", is_short ? "/S" : "",
531 req->req.length - req->req.actual, req);
532
533 /* requests complete when all IN data is in the FIFO */
534 if (is_last) {
535 done(ep, req, 0);
536 if (list_empty(&ep->queue)) {
537 pio_irq_disable(ep_index(ep));
538 }
539 return 1;
540 }
541 } else {
542 DEBUG("Hmm.. %d ep FIFO is not empty!\n", ep_index(ep));
543 }
544
545 return 0;
546}
547
548/** Read to request from FIFO (max read == bytes in fifo)
549 * Return: 0 = still running, 1 = completed, negative = errno
550 * NOTE: INDEX register must be set for EP
551 */
552static int read_fifo(struct lh7a40x_ep *ep, struct lh7a40x_request *req)
553{
554 u32 csr;
555 u8 *buf;
556 unsigned bufferspace, count, is_short;
557 volatile u32 *fifo = (volatile u32 *)ep->fifo;
558
559 /* make sure there's a packet in the FIFO. */
560 csr = usb_read(ep->csr1);
561 if (!(csr & USB_OUT_CSR1_OUT_PKT_RDY)) {
562 DEBUG("%s: Packet NOT ready!\n", __FUNCTION__);
563 return -EINVAL;
564 }
565
566 buf = req->req.buf + req->req.actual;
567 prefetchw(buf);
568 bufferspace = req->req.length - req->req.actual;
569
570 /* read all bytes from this packet */
571 count = usb_read(USB_OUT_FIFO_WC1);
572 req->req.actual += min(count, bufferspace);
573
574 is_short = (count < ep->ep.maxpacket);
575 DEBUG("read %s %02x, %d bytes%s req %p %d/%d\n",
576 ep->ep.name, csr, count,
577 is_short ? "/S" : "", req, req->req.actual, req->req.length);
578
579 while (likely(count-- != 0)) {
580 u8 byte = (u8) (*fifo & 0xff);
581
582 if (unlikely(bufferspace == 0)) {
583 /* this happens when the driver's buffer
584 * is smaller than what the host sent.
585 * discard the extra data.
586 */
587 if (req->req.status != -EOVERFLOW)
588 printk("%s overflow %d\n", ep->ep.name, count);
589 req->req.status = -EOVERFLOW;
590 } else {
591 *buf++ = byte;
592 bufferspace--;
593 }
594 }
595
596 usb_clear(USB_OUT_CSR1_OUT_PKT_RDY, ep->csr1);
597
598 /* completion */
599 if (is_short || req->req.actual == req->req.length) {
600 done(ep, req, 0);
601 usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1);
602
603 if (list_empty(&ep->queue))
604 pio_irq_disable(ep_index(ep));
605 return 1;
606 }
607
608 /* finished that packet. the next one may be waiting... */
609 return 0;
610}
611
612/*
613 * done - retire a request; caller blocked irqs
614 * INDEX register is preserved to keep same
615 */
616static void done(struct lh7a40x_ep *ep, struct lh7a40x_request *req, int status)
617{
618 unsigned int stopped = ep->stopped;
619 u32 index;
620
621 DEBUG("%s, %p\n", __FUNCTION__, ep);
622 list_del_init(&req->queue);
623
624 if (likely(req->req.status == -EINPROGRESS))
625 req->req.status = status;
626 else
627 status = req->req.status;
628
629 if (status && status != -ESHUTDOWN)
630 DEBUG("complete %s req %p stat %d len %u/%u\n",
631 ep->ep.name, &req->req, status,
632 req->req.actual, req->req.length);
633
634 /* don't modify queue heads during completion callback */
635 ep->stopped = 1;
636 /* Read current index (completion may modify it) */
637 index = usb_read(USB_INDEX);
638
639 spin_unlock(&ep->dev->lock);
640 req->req.complete(&ep->ep, &req->req);
641 spin_lock(&ep->dev->lock);
642
643 /* Restore index */
644 usb_set_index(index);
645 ep->stopped = stopped;
646}
647
648/** Enable EP interrupt */
649static void pio_irq_enable(int ep)
650{
651 DEBUG("%s: %d\n", __FUNCTION__, ep);
652
653 switch (ep) {
654 case 1:
655 usb_set(USB_IN_INT_EP1, USB_IN_INT_EN);
656 break;
657 case 2:
658 usb_set(USB_OUT_INT_EP2, USB_OUT_INT_EN);
659 break;
660 case 3:
661 usb_set(USB_IN_INT_EP3, USB_IN_INT_EN);
662 break;
663 default:
664 DEBUG("Unknown endpoint: %d\n", ep);
665 break;
666 }
667}
668
669/** Disable EP interrupt */
670static void pio_irq_disable(int ep)
671{
672 DEBUG("%s: %d\n", __FUNCTION__, ep);
673
674 switch (ep) {
675 case 1:
676 usb_clear(USB_IN_INT_EP1, USB_IN_INT_EN);
677 break;
678 case 2:
679 usb_clear(USB_OUT_INT_EP2, USB_OUT_INT_EN);
680 break;
681 case 3:
682 usb_clear(USB_IN_INT_EP3, USB_IN_INT_EN);
683 break;
684 default:
685 DEBUG("Unknown endpoint: %d\n", ep);
686 break;
687 }
688}
689
690/*
691 * nuke - dequeue ALL requests
692 */
693void nuke(struct lh7a40x_ep *ep, int status)
694{
695 struct lh7a40x_request *req;
696
697 DEBUG("%s, %p\n", __FUNCTION__, ep);
698
699 /* Flush FIFO */
700 flush(ep);
701
702 /* called with irqs blocked */
703 while (!list_empty(&ep->queue)) {
704 req = list_entry(ep->queue.next, struct lh7a40x_request, queue);
705 done(ep, req, status);
706 }
707
093cf723 708 /* Disable IRQ if EP is enabled (has descriptor) */
1da177e4
LT		 709 if (ep->desc)
710 pio_irq_disable(ep_index(ep));
711}
712
713/*
714void nuke_all(struct lh7a40x_udc *dev)
715{
716 int n;
717 for(n=0; n<UDC_MAX_ENDPOINTS; n++) {
718 struct lh7a40x_ep *ep = &dev->ep[n];
719 usb_set_index(n);
720 nuke(ep, 0);
721 }
722}*/
723
724/*
725static void flush_all(struct lh7a40x_udc *dev)
726{
727 int n;
728 for (n = 0; n < UDC_MAX_ENDPOINTS; n++)
729 {
730 struct lh7a40x_ep *ep = &dev->ep[n];
731 flush(ep);
732 }
733}
734*/
735
736/** Flush EP
737 * NOTE: INDEX register must be set before this call
738 */
739static void flush(struct lh7a40x_ep *ep)
740{
741 DEBUG("%s, %p\n", __FUNCTION__, ep);
742
743 switch (ep->ep_type) {
744 case ep_control:
745 /* check, by implication c.f. 15.1.2.11 */
746 break;
747
748 case ep_bulk_in:
749 case ep_interrupt:
750 /* if(csr & USB_IN_CSR1_IN_PKT_RDY) */
751 usb_set(USB_IN_CSR1_FIFO_FLUSH, ep->csr1);
752 break;
753
754 case ep_bulk_out:
755 /* if(csr & USB_OUT_CSR1_OUT_PKT_RDY) */
756 usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1);
757 break;
758 }
759}
760
761/**
762 * lh7a40x_in_epn - handle IN interrupt
763 */
764static void lh7a40x_in_epn(struct lh7a40x_udc *dev, u32 ep_idx, u32 intr)
765{
766 u32 csr;
767 struct lh7a40x_ep *ep = &dev->ep[ep_idx];
768 struct lh7a40x_request *req;
769
770 usb_set_index(ep_idx);
771
772 csr = usb_read(ep->csr1);
773 DEBUG("%s: %d, csr %x\n", __FUNCTION__, ep_idx, csr);
774
775 if (csr & USB_IN_CSR1_SENT_STALL) {
776 DEBUG("USB_IN_CSR1_SENT_STALL\n");
777 usb_set(USB_IN_CSR1_SENT_STALL /*|USB_IN_CSR1_SEND_STALL */ ,
778 ep->csr1);
779 return;
780 }
781
782 if (!ep->desc) {
783 DEBUG("%s: NO EP DESC\n", __FUNCTION__);
784 return;
785 }
786
787 if (list_empty(&ep->queue))
788 req = 0;
789 else
790 req = list_entry(ep->queue.next, struct lh7a40x_request, queue);
791
792 DEBUG("req: %p\n", req);
793
794 if (!req)
795 return;
796
797 write_fifo(ep, req);
798}
799
800/* ********************************************************************************************* */
801/* Bulk OUT (recv)
802 */
803
804static void lh7a40x_out_epn(struct lh7a40x_udc *dev, u32 ep_idx, u32 intr)
805{
806 struct lh7a40x_ep *ep = &dev->ep[ep_idx];
807 struct lh7a40x_request *req;
808
809 DEBUG("%s: %d\n", __FUNCTION__, ep_idx);
810
811 usb_set_index(ep_idx);
812
813 if (ep->desc) {
814 u32 csr;
815 csr = usb_read(ep->csr1);
816
817 while ((csr =
818 usb_read(ep->
819 csr1)) & (USB_OUT_CSR1_OUT_PKT_RDY |
820 USB_OUT_CSR1_SENT_STALL)) {
821 DEBUG("%s: %x\n", __FUNCTION__, csr);
822
823 if (csr & USB_OUT_CSR1_SENT_STALL) {
824 DEBUG("%s: stall sent, flush fifo\n",
825 __FUNCTION__);
826 /* usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1); */
827 flush(ep);
828 } else if (csr & USB_OUT_CSR1_OUT_PKT_RDY) {
829 if (list_empty(&ep->queue))
830 req = 0;
831 else
832 req =
833 list_entry(ep->queue.next,
834 struct lh7a40x_request,
835 queue);
836
837 if (!req) {
838 printk("%s: NULL REQ %d\n",
839 __FUNCTION__, ep_idx);
840 flush(ep);
841 break;
842 } else {
843 read_fifo(ep, req);
844 }
845 }
846
847 }
848
849 } else {
850 /* Throw packet away.. */
851 printk("%s: No descriptor?!?\n", __FUNCTION__);
852 flush(ep);
853 }
854}
855
856static void stop_activity(struct lh7a40x_udc *dev,
857 struct usb_gadget_driver *driver)
858{
859 int i;
860
861 /* don't disconnect drivers more than once */
862 if (dev->gadget.speed == USB_SPEED_UNKNOWN)
863 driver = 0;
864 dev->gadget.speed = USB_SPEED_UNKNOWN;
865
866 /* prevent new request submissions, kill any outstanding requests */
867 for (i = 0; i < UDC_MAX_ENDPOINTS; i++) {
868 struct lh7a40x_ep *ep = &dev->ep[i];
869 ep->stopped = 1;
870
871 usb_set_index(i);
872 nuke(ep, -ESHUTDOWN);
873 }
874
875 /* report disconnect; the driver is already quiesced */
876 if (driver) {
877 spin_unlock(&dev->lock);
878 driver->disconnect(&dev->gadget);
879 spin_lock(&dev->lock);
880 }
881
882 /* re-init driver-visible data structures */
883 udc_reinit(dev);
884}
885
886/** Handle USB RESET interrupt
887 */
888static void lh7a40x_reset_intr(struct lh7a40x_udc *dev)
889{
890#if 0 /* def CONFIG_ARCH_LH7A404 */
891 /* Does not work always... */
892
893 DEBUG("%s: %d\n", __FUNCTION__, dev->usb_address);
894
895 if (!dev->usb_address) {
896 /*usb_set(USB_RESET_IO, USB_RESET);
897 mdelay(5);
898 usb_clear(USB_RESET_IO, USB_RESET); */
899 return;
900 }
901 /* Put the USB controller into reset. */
902 usb_set(USB_RESET_IO, USB_RESET);
903
904 /* Set Device ID to 0 */
905 udc_set_address(dev, 0);
906
907 /* Let PLL2 settle down */
908 mdelay(5);
909
910 /* Release the USB controller from reset */
911 usb_clear(USB_RESET_IO, USB_RESET);
912
913 /* Re-enable UDC */
914 udc_enable(dev);
915
916#endif
917 dev->gadget.speed = USB_SPEED_FULL;
918}
919
920/*
921 * lh7a40x usb client interrupt handler.
922 */
923static irqreturn_t lh7a40x_udc_irq(int irq, void *_dev, struct pt_regs *r)
924{
925 struct lh7a40x_udc *dev = _dev;
926
927 DEBUG("\n\n");
928
929 spin_lock(&dev->lock);
930
931 for (;;) {
932 u32 intr_in = usb_read(USB_IN_INT);
933 u32 intr_out = usb_read(USB_OUT_INT);
934 u32 intr_int = usb_read(USB_INT);
935
936 /* Test also against enable bits.. (lh7a40x errata).. Sigh.. */
937 u32 in_en = usb_read(USB_IN_INT_EN);
938 u32 out_en = usb_read(USB_OUT_INT_EN);
939
940 if (!intr_out && !intr_in && !intr_int)
941 break;
942
943 DEBUG("%s (on state %s)\n", __FUNCTION__,
944 state_names[dev->ep0state]);
945 DEBUG("intr_out = %x\n", intr_out);
946 DEBUG("intr_in = %x\n", intr_in);
947 DEBUG("intr_int = %x\n", intr_int);
948
949 if (intr_in) {
950 usb_write(intr_in, USB_IN_INT);
951
952 if ((intr_in & USB_IN_INT_EP1)
953 && (in_en & USB_IN_INT_EP1)) {
954 DEBUG("USB_IN_INT_EP1\n");
955 lh7a40x_in_epn(dev, 1, intr_in);
956 }
957 if ((intr_in & USB_IN_INT_EP3)
958 && (in_en & USB_IN_INT_EP3)) {
959 DEBUG("USB_IN_INT_EP3\n");
960 lh7a40x_in_epn(dev, 3, intr_in);
961 }
962 if (intr_in & USB_IN_INT_EP0) {
963 DEBUG("USB_IN_INT_EP0 (control)\n");
964 lh7a40x_handle_ep0(dev, intr_in);
965 }
966 }
967
968 if (intr_out) {
969 usb_write(intr_out, USB_OUT_INT);
970
971 if ((intr_out & USB_OUT_INT_EP2)
972 && (out_en & USB_OUT_INT_EP2)) {
973 DEBUG("USB_OUT_INT_EP2\n");
974 lh7a40x_out_epn(dev, 2, intr_out);
975 }
976 }
977
978 if (intr_int) {
979 usb_write(intr_int, USB_INT);
980
981 if (intr_int & USB_INT_RESET_INT) {
982 lh7a40x_reset_intr(dev);
983 }
984
985 if (intr_int & USB_INT_RESUME_INT) {
986 DEBUG("USB resume\n");
987
988 if (dev->gadget.speed != USB_SPEED_UNKNOWN
989 && dev->driver
990 && dev->driver->resume
991 && is_usb_connected()) {
992 dev->driver->resume(&dev->gadget);
993 }
994 }
995
996 if (intr_int & USB_INT_SUSPEND_INT) {
997 DEBUG("USB suspend%s\n",
998 is_usb_connected()? "" : "+disconnect");
999 if (!is_usb_connected()) {
1000 stop_activity(dev, dev->driver);
1001 } else if (dev->gadget.speed !=
1002 USB_SPEED_UNKNOWN && dev->driver
1003 && dev->driver->suspend) {
1004 dev->driver->suspend(&dev->gadget);
1005 }
1006 }
1007
1008 }
1009 }
1010
1011 spin_unlock(&dev->lock);
1012
1013 return IRQ_HANDLED;
1014}
1015
1016static int lh7a40x_ep_enable(struct usb_ep *_ep,
1017 const struct usb_endpoint_descriptor *desc)
1018{
1019 struct lh7a40x_ep *ep;
1020 struct lh7a40x_udc *dev;
1021 unsigned long flags;
1022
1023 DEBUG("%s, %p\n", __FUNCTION__, _ep);
1024
1025 ep = container_of(_ep, struct lh7a40x_ep, ep);
1026 if (!_ep || !desc || ep->desc || _ep->name == ep0name
1027 || desc->bDescriptorType != USB_DT_ENDPOINT
1028 || ep->bEndpointAddress != desc->bEndpointAddress
1029 || ep_maxpacket(ep) < le16_to_cpu(desc->wMaxPacketSize)) {
1030 DEBUG("%s, bad ep or descriptor\n", __FUNCTION__);
1031 return -EINVAL;
1032 }
1033
1034 /* xfer types must match, except that interrupt ~= bulk */
1035 if (ep->bmAttributes != desc->bmAttributes
1036 && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
1037 && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
1038 DEBUG("%s, %s type mismatch\n", __FUNCTION__, _ep->name);
1039 return -EINVAL;
1040 }
1041
1042 /* hardware _could_ do smaller, but driver doesn't */
1043 if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
1044 && le16_to_cpu(desc->wMaxPacketSize) != ep_maxpacket(ep))
1045 || !desc->wMaxPacketSize) {
1046 DEBUG("%s, bad %s maxpacket\n", __FUNCTION__, _ep->name);
1047 return -ERANGE;
1048 }
1049
1050 dev = ep->dev;
1051 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
1052 DEBUG("%s, bogus device state\n", __FUNCTION__);
1053 return -ESHUTDOWN;
1054 }
1055
1056 spin_lock_irqsave(&ep->dev->lock, flags);
1057
1058 ep->stopped = 0;
1059 ep->desc = desc;
1060 ep->pio_irqs = 0;
1061 ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
1062
1063 /* Reset halt state (does flush) */
1064 lh7a40x_set_halt(_ep, 0);
1065
1066 spin_unlock_irqrestore(&ep->dev->lock, flags);
1067
1068 DEBUG("%s: enabled %s\n", __FUNCTION__, _ep->name);
1069 return 0;
1070}
1071
1072/** Disable EP
1073 * NOTE: Sets INDEX register
1074 */
1075static int lh7a40x_ep_disable(struct usb_ep *_ep)
1076{
1077 struct lh7a40x_ep *ep;
1078 unsigned long flags;
1079
1080 DEBUG("%s, %p\n", __FUNCTION__, _ep);
1081
1082 ep = container_of(_ep, struct lh7a40x_ep, ep);
1083 if (!_ep || !ep->desc) {
1084 DEBUG("%s, %s not enabled\n", __FUNCTION__,
1085 _ep ? ep->ep.name : NULL);
1086 return -EINVAL;
1087 }
1088
1089 spin_lock_irqsave(&ep->dev->lock, flags);
1090
1091 usb_set_index(ep_index(ep));
1092
1093 /* Nuke all pending requests (does flush) */
1094 nuke(ep, -ESHUTDOWN);
1095
1096 /* Disable ep IRQ */
1097 pio_irq_disable(ep_index(ep));
1098
1099 ep->desc = 0;
1100 ep->stopped = 1;
1101
1102 spin_unlock_irqrestore(&ep->dev->lock, flags);
1103
1104 DEBUG("%s: disabled %s\n", __FUNCTION__, _ep->name);
1105 return 0;
1106}
1107
1108static struct usb_request *lh7a40x_alloc_request(struct usb_ep *ep,
1109 int gfp_flags)
1110{
1111 struct lh7a40x_request *req;
1112
1113 DEBUG("%s, %p\n", __FUNCTION__, ep);
1114
1115 req = kmalloc(sizeof *req, gfp_flags);
1116 if (!req)
1117 return 0;
1118
1119 memset(req, 0, sizeof *req);
1120 INIT_LIST_HEAD(&req->queue);
1121
1122 return &req->req;
1123}
1124
1125static void lh7a40x_free_request(struct usb_ep *ep, struct usb_request *_req)
1126{
1127 struct lh7a40x_request *req;
1128
1129 DEBUG("%s, %p\n", __FUNCTION__, ep);
1130
1131 req = container_of(_req, struct lh7a40x_request, req);
1132 WARN_ON(!list_empty(&req->queue));
1133 kfree(req);
1134}
1135
1136static void *lh7a40x_alloc_buffer(struct usb_ep *ep, unsigned bytes,
1137 dma_addr_t * dma, int gfp_flags)
1138{
1139 char *retval;
1140
1141 DEBUG("%s (%p, %d, %d)\n", __FUNCTION__, ep, bytes, gfp_flags);
1142
1143 retval = kmalloc(bytes, gfp_flags & ~(__GFP_DMA | __GFP_HIGHMEM));
1144 if (retval)
1145 *dma = virt_to_bus(retval);
1146 return retval;
1147}
1148
1149static void lh7a40x_free_buffer(struct usb_ep *ep, void *buf, dma_addr_t dma,
1150 unsigned bytes)
1151{
1152 DEBUG("%s, %p\n", __FUNCTION__, ep);
1153 kfree(buf);
1154}
1155
1156/** Queue one request
1157 * Kickstart transfer if needed
1158 * NOTE: Sets INDEX register
1159 */
1160static int lh7a40x_queue(struct usb_ep *_ep, struct usb_request *_req,
1161 int gfp_flags)
1162{
1163 struct lh7a40x_request *req;
1164 struct lh7a40x_ep *ep;
1165 struct lh7a40x_udc *dev;
1166 unsigned long flags;
1167
1168 DEBUG("\n\n\n%s, %p\n", __FUNCTION__, _ep);
1169
1170 req = container_of(_req, struct lh7a40x_request, req);
1171 if (unlikely
1172 (!_req || !_req->complete || !_req->buf
1173 || !list_empty(&req->queue))) {
1174 DEBUG("%s, bad params\n", __FUNCTION__);
1175 return -EINVAL;
1176 }
1177
1178 ep = container_of(_ep, struct lh7a40x_ep, ep);
1179 if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1180 DEBUG("%s, bad ep\n", __FUNCTION__);
1181 return -EINVAL;
1182 }
1183
1184 dev = ep->dev;
1185 if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1186 DEBUG("%s, bogus device state %p\n", __FUNCTION__, dev->driver);
1187 return -ESHUTDOWN;
1188 }
1189
1190 DEBUG("%s queue req %p, len %d buf %p\n", _ep->name, _req, _req->length,
1191 _req->buf);
1192
1193 spin_lock_irqsave(&dev->lock, flags);
1194
1195 _req->status = -EINPROGRESS;
1196 _req->actual = 0;
1197
1198 /* kickstart this i/o queue? */
1199 DEBUG("Add to %d Q %d %d\n", ep_index(ep), list_empty(&ep->queue),
1200 ep->stopped);
1201 if (list_empty(&ep->queue) && likely(!ep->stopped)) {
1202 u32 csr;
1203
1204 if (unlikely(ep_index(ep) == 0)) {
1205 /* EP0 */
1206 list_add_tail(&req->queue, &ep->queue);
1207 lh7a40x_ep0_kick(dev, ep);
1208 req = 0;
1209 } else if (ep_is_in(ep)) {
1210 /* EP1 & EP3 */
1211 usb_set_index(ep_index(ep));
1212 csr = usb_read(ep->csr1);
1213 pio_irq_enable(ep_index(ep));
1214 if ((csr & USB_IN_CSR1_FIFO_NOT_EMPTY) == 0) {
1215 if (write_fifo(ep, req) == 1)
1216 req = 0;
1217 }
1218 } else {
1219 /* EP2 */
1220 usb_set_index(ep_index(ep));
1221 csr = usb_read(ep->csr1);
1222 pio_irq_enable(ep_index(ep));
1223 if (!(csr & USB_OUT_CSR1_FIFO_FULL)) {
1224 if (read_fifo(ep, req) == 1)
1225 req = 0;
1226 }
1227 }
1228 }
1229
1230 /* pio or dma irq handler advances the queue. */
1231 if (likely(req != 0))
1232 list_add_tail(&req->queue, &ep->queue);
1233
1234 spin_unlock_irqrestore(&dev->lock, flags);
1235
1236 return 0;
1237}
1238
1239/* dequeue JUST ONE request */
1240static int lh7a40x_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1241{
1242 struct lh7a40x_ep *ep;
1243 struct lh7a40x_request *req;
1244 unsigned long flags;
1245
1246 DEBUG("%s, %p\n", __FUNCTION__, _ep);
1247
1248 ep = container_of(_ep, struct lh7a40x_ep, ep);
1249 if (!_ep || ep->ep.name == ep0name)
1250 return -EINVAL;
1251
1252 spin_lock_irqsave(&ep->dev->lock, flags);
1253
1254 /* make sure it's actually queued on this endpoint */
1255 list_for_each_entry(req, &ep->queue, queue) {
1256 if (&req->req == _req)
1257 break;
1258 }
1259 if (&req->req != _req) {
1260 spin_unlock_irqrestore(&ep->dev->lock, flags);
1261 return -EINVAL;
1262 }
1263
1264 done(ep, req, -ECONNRESET);
1265
1266 spin_unlock_irqrestore(&ep->dev->lock, flags);
1267 return 0;
1268}
1269
1270/** Halt specific EP
1271 * Return 0 if success
1272 * NOTE: Sets INDEX register to EP !
1273 */
1274static int lh7a40x_set_halt(struct usb_ep *_ep, int value)
1275{
1276 struct lh7a40x_ep *ep;
1277 unsigned long flags;
1278
1279 ep = container_of(_ep, struct lh7a40x_ep, ep);
1280 if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1281 DEBUG("%s, bad ep\n", __FUNCTION__);
1282 return -EINVAL;
1283 }
1284
1285 usb_set_index(ep_index(ep));
1286
1287 DEBUG("%s, ep %d, val %d\n", __FUNCTION__, ep_index(ep), value);
1288
1289 spin_lock_irqsave(&ep->dev->lock, flags);
1290
1291 if (ep_index(ep) == 0) {
1292 /* EP0 */
1293 usb_set(EP0_SEND_STALL, ep->csr1);
1294 } else if (ep_is_in(ep)) {
1295 u32 csr = usb_read(ep->csr1);
1296 if (value && ((csr & USB_IN_CSR1_FIFO_NOT_EMPTY)
1297 || !list_empty(&ep->queue))) {
1298 /*
1299 * Attempts to halt IN endpoints will fail (returning -EAGAIN)
1300 * if any transfer requests are still queued, or if the controller