Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
[linux-2.6] / 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 "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
48 struct lh7a40x_udc *the_controller;
49
50 static const char driver_name[] = "lh7a40x_udc";
51 static const char driver_desc[] = DRIVER_DESC;
52 static const char ep0name[] = "ep0-control";
53
54 /*
55   Local definintions.
56 */
57
58 #ifndef NO_STATES
59 static 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 */
71 static int lh7a40x_ep_enable(struct usb_ep *ep,
72                              const struct usb_endpoint_descriptor *);
73 static int lh7a40x_ep_disable(struct usb_ep *ep);
74 static struct usb_request *lh7a40x_alloc_request(struct usb_ep *ep, gfp_t);
75 static void lh7a40x_free_request(struct usb_ep *ep, struct usb_request *);
76 static void *lh7a40x_alloc_buffer(struct usb_ep *ep, unsigned, dma_addr_t *,
77                                   gfp_t);
78 static void lh7a40x_free_buffer(struct usb_ep *ep, void *, dma_addr_t,
79                                 unsigned);
80 static int lh7a40x_queue(struct usb_ep *ep, struct usb_request *, gfp_t);
81 static int lh7a40x_dequeue(struct usb_ep *ep, struct usb_request *);
82 static int lh7a40x_set_halt(struct usb_ep *ep, int);
83 static int lh7a40x_fifo_status(struct usb_ep *ep);
84 static int lh7a40x_fifo_status(struct usb_ep *ep);
85 static void lh7a40x_fifo_flush(struct usb_ep *ep);
86 static void lh7a40x_ep0_kick(struct lh7a40x_udc *dev, struct lh7a40x_ep *ep);
87 static void lh7a40x_handle_ep0(struct lh7a40x_udc *dev, u32 intr);
88
89 static void done(struct lh7a40x_ep *ep, struct lh7a40x_request *req,
90                  int status);
91 static void pio_irq_enable(int bEndpointAddress);
92 static void pio_irq_disable(int bEndpointAddress);
93 static void stop_activity(struct lh7a40x_udc *dev,
94                           struct usb_gadget_driver *driver);
95 static void flush(struct lh7a40x_ep *ep);
96 static void udc_enable(struct lh7a40x_udc *dev);
97 static void udc_set_address(struct lh7a40x_udc *dev, unsigned char address);
98
99 static 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
119 static __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
143 static __inline__ void usb_set_index(u32 ep)
144 {
145         *(volatile u32 *)io_p2v(USB_INDEX) = ep;
146 }
147
148 static __inline__ u32 usb_read(u32 port)
149 {
150         return *(volatile u32 *)io_p2v(port);
151 }
152
153 static __inline__ void usb_write(u32 val, u32 port)
154 {
155         *(volatile u32 *)io_p2v(port) = val;
156 }
157
158 static __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
165 static __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
196 static const char proc_node_name[] = "driver/udc";
197
198 static int
199 udc_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  */
260 static 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  */
290 static 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  */
323 static 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 */
416 int 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
461 EXPORT_SYMBOL(usb_gadget_register_driver);
462
463 /*
464   Unregister entry point for the peripheral controller driver.
465 */
466 int 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
490 EXPORT_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  */
498 static 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  */
552 static 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  */
616 static 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 */
649 static 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 */
670 static 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  */
693 void 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
708         /* Disable IRQ if EP is enabled (has descriptor) */
709         if (ep->desc)
710                 pio_irq_disable(ep_index(ep));
711 }
712
713 /*
714 void 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 /*
725 static 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  */
739 static 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  */
764 static 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
804 static 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
856 static 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  */
888 static 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  */
923 static 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
1016 static 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  */
1075 static 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
1108 static struct usb_request *lh7a40x_alloc_request(struct usb_ep *ep,
1109                                                  gfp_t 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
1125 static 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
1136 static void *lh7a40x_alloc_buffer(struct usb_ep *ep, unsigned bytes,
1137                                   dma_addr_t * dma, gfp_t 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
1149 static 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  */
1160 static int lh7a40x_queue(struct usb_ep *_ep, struct usb_request *_req,
1161                          gfp_t 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 */
1240 static 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  */
1274 static 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
1301                          * FIFO still holds bytes that the host hasn\92t collected.
1302                          */
1303                         spin_unlock_irqrestore(&ep->dev->lock, flags);
1304                         DEBUG
1305                             ("Attempt to halt IN endpoint failed (returning -EAGAIN) %d %d\n",
1306                              (csr & USB_IN_CSR1_FIFO_NOT_EMPTY),
1307                              !list_empty(&ep->queue));
1308                         return -EAGAIN;
1309                 }
1310                 flush(ep);
1311                 if (value)
1312                         usb_set(USB_IN_CSR1_SEND_STALL, ep->csr1);
1313                 else {
1314                         usb_clear(USB_IN_CSR1_SEND_STALL, ep->csr1);
1315                         usb_set(USB_IN_CSR1_CLR_DATA_TOGGLE, ep->csr1);
1316                 }
1317
1318         } else {
1319
1320                 flush(ep);
1321                 if (value)
1322                         usb_set(USB_OUT_CSR1_SEND_STALL, ep->csr1);
1323                 else {
1324                         usb_clear(USB_OUT_CSR1_SEND_STALL, ep->csr1);
1325                         usb_set(USB_OUT_CSR1_CLR_DATA_REG, ep->csr1);
1326                 }
1327         }
1328
1329         if (value) {
1330                 ep->stopped = 1;
1331         } else {
1332                 ep->stopped = 0;
1333         }
1334
1335         spin_unlock_irqrestore(&ep->dev->lock, flags);
1336
1337         DEBUG("%s %s halted\n", _ep->name, value == 0 ? "NOT" : "IS");
1338
1339         return 0;
1340 }
1341
1342 /** Return bytes in EP FIFO
1343  *  NOTE: Sets INDEX register to EP
1344  */
1345 static int lh7a40x_fifo_status(struct usb_ep *_ep)
1346 {
1347         u32 csr;
1348         int count = 0;
1349         struct lh7a40x_ep *ep;
1350
1351         ep = container_of(_ep, struct lh7a40x_ep, ep);
1352         if (!_ep) {
1353                 DEBUG("%s, bad ep\n", __FUNCTION__);
1354                 return -ENODEV;
1355         }
1356
1357         DEBUG("%s, %d\n", __FUNCTION__, ep_index(ep));
1358
1359         /* LPD can't report unclaimed bytes from IN fifos */
1360         if (ep_is_in(ep))
1361                 return -EOPNOTSUPP;
1362
1363         usb_set_index(ep_index(ep));
1364
1365         csr = usb_read(ep->csr1);
1366         if (ep->dev->gadget.speed != USB_SPEED_UNKNOWN ||
1367             csr & USB_OUT_CSR1_OUT_PKT_RDY) {
1368                 count = usb_read(USB_OUT_FIFO_WC1);
1369         }
1370
1371         return count;
1372 }
1373
1374 /** Flush EP FIFO
1375  *  NOTE: Sets INDEX register to EP
1376  */
1377 static void lh7a40x_fifo_flush(struct usb_ep *_ep)
1378 {
1379         struct lh7a40x_ep *ep;
1380
1381         ep = container_of(_ep, struct lh7a40x_ep, ep);
1382         if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1383                 DEBUG("%s, bad ep\n", __FUNCTION__);
1384                 return;
1385         }
1386
1387         usb_set_index(ep_index(ep));
1388         flush(ep);
1389 }
1390
1391 /****************************************************************/
1392 /* End Point 0 related functions                                */
1393 /****************************************************************/
1394
1395 /* return:  0 = still running, 1 = completed, negative = errno */
1396 static int write_fifo_ep0(struct lh7a40x_ep *ep, struct lh7a40x_request *req)
1397 {
1398         u32 max;
1399         unsigned count;
1400         int is_last;
1401
1402         max = ep_maxpacket(ep);
1403
1404         DEBUG_EP0("%s\n", __FUNCTION__);
1405
1406         count = write_packet(ep, req, max);
1407
1408         /* last packet is usually short (or a zlp) */
1409         if (unlikely(count != max))
1410                 is_last = 1;
1411         else {
1412                 if (likely(req->req.length != req->req.actual) || req->req.zero)
1413                         is_last = 0;
1414                 else
1415                         is_last = 1;
1416         }
1417
1418         DEBUG_EP0("%s: wrote %s %d bytes%s %d left %p\n", __FUNCTION__,
1419                   ep->ep.name, count,
1420                   is_last ? "/L" : "", req->req.length - req->req.actual, req);
1421
1422         /* requests complete when all IN data is in the FIFO */
1423         if (is_last) {
1424                 done(ep, req, 0);
1425                 return 1;
1426         }
1427
1428         return 0;
1429 }
1430
1431 static __inline__ int lh7a40x_fifo_read(struct lh7a40x_ep *ep,
1432                                         unsigned char *cp, int max)
1433 {
1434         int bytes;
1435         int count = usb_read(USB_OUT_FIFO_WC1);
1436         volatile u32 *fifo = (volatile u32 *)ep->fifo;
1437
1438         if (count > max)
1439                 count = max;
1440         bytes = count;
1441         while (count--)
1442                 *cp++ = *fifo & 0xFF;
1443         return bytes;
1444 }
1445
1446 static __inline__ void lh7a40x_fifo_write(struct lh7a40x_ep *ep,
1447                                           unsigned char *cp, int count)
1448 {
1449         volatile u32 *fifo = (volatile u32 *)ep->fifo;
1450         DEBUG_EP0("fifo_write: %d %d\n", ep_index(ep), count);
1451         while (count--)
1452                 *fifo = *cp++;
1453 }
1454
1455 static int read_fifo_ep0(struct lh7a40x_ep *ep, struct lh7a40x_request *req)
1456 {
1457         u32 csr;
1458         u8 *buf;
1459         unsigned bufferspace, count, is_short;
1460         volatile u32 *fifo = (volatile u32 *)ep->fifo;
1461
1462         DEBUG_EP0("%s\n", __FUNCTION__);
1463
1464         csr = usb_read(USB_EP0_CSR);
1465         if (!(csr & USB_OUT_CSR1_OUT_PKT_RDY))
1466                 return 0;
1467
1468         buf = req->req.buf + req->req.actual;
1469         prefetchw(buf);
1470         bufferspace = req->req.length - req->req.actual;
1471
1472         /* read all bytes from this packet */
1473         if (likely(csr & EP0_OUT_PKT_RDY)) {
1474                 count = usb_read(USB_OUT_FIFO_WC1);
1475                 req->req.actual += min(count, bufferspace);
1476         } else                  /* zlp */
1477                 count = 0;
1478
1479         is_short = (count < ep->ep.maxpacket);
1480         DEBUG_EP0("read %s %02x, %d bytes%s req %p %d/%d\n",
1481                   ep->ep.name, csr, count,
1482                   is_short ? "/S" : "", req, req->req.actual, req->req.length);
1483
1484         while (likely(count-- != 0)) {
1485                 u8 byte = (u8) (*fifo & 0xff);
1486
1487                 if (unlikely(bufferspace == 0)) {
1488                         /* this happens when the driver's buffer
1489                          * is smaller than what the host sent.
1490                          * discard the extra data.
1491                          */
1492                         if (req->req.status != -EOVERFLOW)
1493                                 DEBUG_EP0("%s overflow %d\n", ep->ep.name,
1494                                           count);
1495                         req->req.status = -EOVERFLOW;
1496                 } else {
1497                         *buf++ = byte;
1498                         bufferspace--;
1499                 }
1500         }
1501
1502         /* completion */
1503         if (is_short || req->req.actual == req->req.length) {
1504                 done(ep, req, 0);
1505                 return 1;
1506         }
1507
1508         /* finished that packet.  the next one may be waiting... */
1509         return 0;
1510 }
1511
1512 /**
1513  * udc_set_address - set the USB address for this device
1514  * @address:
1515  *
1516  * Called from control endpoint function after it decodes a set address setup packet.
1517  */
1518 static void udc_set_address(struct lh7a40x_udc *dev, unsigned char address)
1519 {
1520         DEBUG_EP0("%s: %d\n", __FUNCTION__, address);
1521         /* c.f. 15.1.2.2 Table 15-4 address will be used after DATA_END is set */
1522         dev->usb_address = address;
1523         usb_set((address & USB_FA_FUNCTION_ADDR), USB_FA);
1524         usb_set(USB_FA_ADDR_UPDATE | (address & USB_FA_FUNCTION_ADDR), USB_FA);
1525         /* usb_read(USB_FA); */
1526 }
1527
1528 /*
1529  * DATA_STATE_RECV (OUT_PKT_RDY)
1530  *      - if error
1531  *              set EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL bits
1532  *      - else
1533  *              set EP0_CLR_OUT bit
1534                                 if last set EP0_DATA_END bit
1535  */
1536 static void lh7a40x_ep0_out(struct lh7a40x_udc *dev, u32 csr)
1537 {
1538         struct lh7a40x_request *req;
1539         struct lh7a40x_ep *ep = &dev->ep[0];
1540         int ret;
1541
1542         DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
1543
1544         if (list_empty(&ep->queue))
1545                 req = 0;
1546         else
1547                 req = list_entry(ep->queue.next, struct lh7a40x_request, queue);
1548
1549         if (req) {
1550
1551                 if (req->req.length == 0) {
1552                         DEBUG_EP0("ZERO LENGTH OUT!\n");
1553                         usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR);
1554                         dev->ep0state = WAIT_FOR_SETUP;
1555                         return;
1556                 }
1557                 ret = read_fifo_ep0(ep, req);
1558                 if (ret) {
1559                         /* Done! */
1560                         DEBUG_EP0("%s: finished, waiting for status\n",
1561                                   __FUNCTION__);
1562
1563                         usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR);
1564                         dev->ep0state = WAIT_FOR_SETUP;
1565                 } else {
1566                         /* Not done yet.. */
1567                         DEBUG_EP0("%s: not finished\n", __FUNCTION__);
1568                         usb_set(EP0_CLR_OUT, USB_EP0_CSR);
1569                 }
1570         } else {
1571                 DEBUG_EP0("NO REQ??!\n");
1572         }
1573 }
1574
1575 /*
1576  * DATA_STATE_XMIT
1577  */
1578 static int lh7a40x_ep0_in(struct lh7a40x_udc *dev, u32 csr)
1579 {
1580         struct lh7a40x_request *req;
1581         struct lh7a40x_ep *ep = &dev->ep[0];
1582         int ret, need_zlp = 0;
1583
1584         DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
1585
1586         if (list_empty(&ep->queue))
1587                 req = 0;
1588         else
1589                 req = list_entry(ep->queue.next, struct lh7a40x_request, queue);
1590
1591         if (!req) {
1592                 DEBUG_EP0("%s: NULL REQ\n", __FUNCTION__);
1593                 return 0;
1594         }
1595
1596         if (req->req.length == 0) {
1597
1598                 usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1599                 dev->ep0state = WAIT_FOR_SETUP;
1600                 return 1;
1601         }
1602
1603         if (req->req.length - req->req.actual == EP0_PACKETSIZE) {
1604                 /* Next write will end with the packet size, */
1605                 /* so we need Zero-length-packet */
1606                 need_zlp = 1;
1607         }
1608
1609         ret = write_fifo_ep0(ep, req);
1610
1611         if (ret == 1 && !need_zlp) {
1612                 /* Last packet */
1613                 DEBUG_EP0("%s: finished, waiting for status\n", __FUNCTION__);
1614
1615                 usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1616                 dev->ep0state = WAIT_FOR_SETUP;
1617         } else {
1618                 DEBUG_EP0("%s: not finished\n", __FUNCTION__);
1619                 usb_set(EP0_IN_PKT_RDY, USB_EP0_CSR);
1620         }
1621
1622         if (need_zlp) {
1623                 DEBUG_EP0("%s: Need ZLP!\n", __FUNCTION__);
1624                 usb_set(EP0_IN_PKT_RDY, USB_EP0_CSR);
1625                 dev->ep0state = DATA_STATE_NEED_ZLP;
1626         }
1627
1628         return 1;
1629 }
1630
1631 static int lh7a40x_handle_get_status(struct lh7a40x_udc *dev,
1632                                      struct usb_ctrlrequest *ctrl)
1633 {
1634         struct lh7a40x_ep *ep0 = &dev->ep[0];
1635         struct lh7a40x_ep *qep;
1636         int reqtype = (ctrl->bRequestType & USB_RECIP_MASK);
1637         u16 val = 0;
1638
1639         if (reqtype == USB_RECIP_INTERFACE) {
1640                 /* This is not supported.
1641                  * And according to the USB spec, this one does nothing..
1642                  * Just return 0
1643                  */
1644                 DEBUG_SETUP("GET_STATUS: USB_RECIP_INTERFACE\n");
1645         } else if (reqtype == USB_RECIP_DEVICE) {
1646                 DEBUG_SETUP("GET_STATUS: USB_RECIP_DEVICE\n");
1647                 val |= (1 << 0);        /* Self powered */
1648                 /*val |= (1<<1); *//* Remote wakeup */
1649         } else if (reqtype == USB_RECIP_ENDPOINT) {
1650                 int ep_num = (ctrl->wIndex & ~USB_DIR_IN);
1651
1652                 DEBUG_SETUP
1653                     ("GET_STATUS: USB_RECIP_ENDPOINT (%d), ctrl->wLength = %d\n",
1654                      ep_num, ctrl->wLength);
1655
1656                 if (ctrl->wLength > 2 || ep_num > 3)
1657                         return -EOPNOTSUPP;
1658
1659                 qep = &dev->ep[ep_num];
1660                 if (ep_is_in(qep) != ((ctrl->wIndex & USB_DIR_IN) ? 1 : 0)
1661                     && ep_index(qep) != 0) {
1662                         return -EOPNOTSUPP;
1663                 }
1664
1665                 usb_set_index(ep_index(qep));
1666
1667                 /* Return status on next IN token */
1668                 switch (qep->ep_type) {
1669                 case ep_control:
1670                         val =
1671                             (usb_read(qep->csr1) & EP0_SEND_STALL) ==
1672                             EP0_SEND_STALL;
1673                         break;
1674                 case ep_bulk_in:
1675                 case ep_interrupt:
1676                         val =
1677                             (usb_read(qep->csr1) & USB_IN_CSR1_SEND_STALL) ==
1678                             USB_IN_CSR1_SEND_STALL;
1679                         break;
1680                 case ep_bulk_out:
1681                         val =
1682                             (usb_read(qep->csr1) & USB_OUT_CSR1_SEND_STALL) ==
1683                             USB_OUT_CSR1_SEND_STALL;
1684                         break;
1685                 }
1686
1687                 /* Back to EP0 index */
1688                 usb_set_index(0);
1689
1690                 DEBUG_SETUP("GET_STATUS, ep: %d (%x), val = %d\n", ep_num,
1691                             ctrl->wIndex, val);
1692         } else {
1693                 DEBUG_SETUP("Unknown REQ TYPE: %d\n", reqtype);
1694                 return -EOPNOTSUPP;
1695         }
1696
1697         /* Clear "out packet ready" */
1698         usb_set((EP0_CLR_OUT), USB_EP0_CSR);
1699         /* Put status to FIFO */
1700         lh7a40x_fifo_write(ep0, (u8 *) & val, sizeof(val));
1701         /* Issue "In packet ready" */
1702         usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1703
1704         return 0;
1705 }
1706
1707 /*
1708  * WAIT_FOR_SETUP (OUT_PKT_RDY)
1709  *      - read data packet from EP0 FIFO
1710  *      - decode command
1711  *      - if error
1712  *              set EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL bits
1713  *      - else
1714  *              set EP0_CLR_OUT | EP0_DATA_END bits
1715  */
1716 static void lh7a40x_ep0_setup(struct lh7a40x_udc *dev, u32 csr)
1717 {
1718         struct lh7a40x_ep *ep = &dev->ep[0];
1719         struct usb_ctrlrequest ctrl;
1720         int i, bytes, is_in;
1721
1722         DEBUG_SETUP("%s: %x\n", __FUNCTION__, csr);
1723
1724         /* Nuke all previous transfers */
1725         nuke(ep, -EPROTO);
1726
1727         /* read control req from fifo (8 bytes) */
1728         bytes = lh7a40x_fifo_read(ep, (unsigned char *)&ctrl, 8);
1729
1730         DEBUG_SETUP("Read CTRL REQ %d bytes\n", bytes);
1731         DEBUG_SETUP("CTRL.bRequestType = %d (is_in %d)\n", ctrl.bRequestType,
1732                     ctrl.bRequestType == USB_DIR_IN);
1733         DEBUG_SETUP("CTRL.bRequest = %d\n", ctrl.bRequest);
1734         DEBUG_SETUP("CTRL.wLength = %d\n", ctrl.wLength);
1735         DEBUG_SETUP("CTRL.wValue = %d (%d)\n", ctrl.wValue, ctrl.wValue >> 8);
1736         DEBUG_SETUP("CTRL.wIndex = %d\n", ctrl.wIndex);
1737
1738         /* Set direction of EP0 */
1739         if (likely(ctrl.bRequestType & USB_DIR_IN)) {
1740                 ep->bEndpointAddress |= USB_DIR_IN;
1741                 is_in = 1;
1742         } else {
1743                 ep->bEndpointAddress &= ~USB_DIR_IN;
1744                 is_in = 0;
1745         }
1746
1747         dev->req_pending = 1;
1748
1749         /* Handle some SETUP packets ourselves */
1750         switch (ctrl.bRequest) {
1751         case USB_REQ_SET_ADDRESS:
1752                 if (ctrl.bRequestType != (USB_TYPE_STANDARD | USB_RECIP_DEVICE))
1753                         break;
1754
1755                 DEBUG_SETUP("USB_REQ_SET_ADDRESS (%d)\n", ctrl.wValue);
1756                 udc_set_address(dev, ctrl.wValue);
1757                 usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR);
1758                 return;
1759
1760         case USB_REQ_GET_STATUS:{
1761                         if (lh7a40x_handle_get_status(dev, &ctrl) == 0)
1762                                 return;
1763
1764         case USB_REQ_CLEAR_FEATURE:
1765         case USB_REQ_SET_FEATURE:
1766                         if (ctrl.bRequestType == USB_RECIP_ENDPOINT) {
1767                                 struct lh7a40x_ep *qep;
1768                                 int ep_num = (ctrl.wIndex & 0x0f);
1769
1770                                 /* Support only HALT feature */
1771                                 if (ctrl.wValue != 0 || ctrl.wLength != 0
1772                                     || ep_num > 3 || ep_num < 1)
1773                                         break;
1774
1775                                 qep = &dev->ep[ep_num];
1776                                 if (ctrl.bRequest == USB_REQ_SET_FEATURE) {
1777                                         DEBUG_SETUP("SET_FEATURE (%d)\n",
1778                                                     ep_num);
1779                                         lh7a40x_set_halt(&qep->ep, 1);
1780                                 } else {
1781                                         DEBUG_SETUP("CLR_FEATURE (%d)\n",
1782                                                     ep_num);
1783                                         lh7a40x_set_halt(&qep->ep, 0);
1784                                 }
1785                                 usb_set_index(0);
1786
1787                                 /* Reply with a ZLP on next IN token */
1788                                 usb_set((EP0_CLR_OUT | EP0_DATA_END),
1789                                         USB_EP0_CSR);
1790                                 return;
1791                         }
1792                         break;
1793                 }
1794
1795         default:
1796                 break;
1797         }
1798
1799         if (likely(dev->driver)) {
1800                 /* device-2-host (IN) or no data setup command, process immediately */
1801                 spin_unlock(&dev->lock);
1802                 i = dev->driver->setup(&dev->gadget, &ctrl);
1803                 spin_lock(&dev->lock);
1804
1805                 if (i < 0) {
1806                         /* setup processing failed, force stall */
1807                         DEBUG_SETUP
1808                             ("  --> ERROR: gadget setup FAILED (stalling), setup returned %d\n",
1809                              i);
1810                         usb_set_index(0);
1811                         usb_set((EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL),
1812                                 USB_EP0_CSR);
1813
1814                         /* ep->stopped = 1; */
1815                         dev->ep0state = WAIT_FOR_SETUP;
1816                 }
1817         }
1818 }
1819
1820 /*
1821  * DATA_STATE_NEED_ZLP
1822  */
1823 static void lh7a40x_ep0_in_zlp(struct lh7a40x_udc *dev, u32 csr)
1824 {
1825         DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
1826
1827         /* c.f. Table 15-14 */
1828         usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1829         dev->ep0state = WAIT_FOR_SETUP;
1830 }
1831
1832 /*
1833  * handle ep0 interrupt
1834  */
1835 static void lh7a40x_handle_ep0(struct lh7a40x_udc *dev, u32 intr)
1836 {
1837         struct lh7a40x_ep *ep = &dev->ep[0];
1838         u32 csr;
1839
1840         /* Set index 0 */
1841         usb_set_index(0);
1842         csr = usb_read(USB_EP0_CSR);
1843
1844         DEBUG_EP0("%s: csr = %x\n", __FUNCTION__, csr);
1845
1846         /*
1847          * For overview of what we should be doing see c.f. Chapter 18.1.2.4
1848          * We will follow that outline here modified by our own global state
1849          * indication which provides hints as to what we think should be
1850          * happening..
1851          */
1852
1853         /*
1854          * if SENT_STALL is set
1855          *      - clear the SENT_STALL bit
1856          */
1857         if (csr & EP0_SENT_STALL) {
1858                 DEBUG_EP0("%s: EP0_SENT_STALL is set: %x\n", __FUNCTION__, csr);
1859                 usb_clear((EP0_SENT_STALL | EP0_SEND_STALL), USB_EP0_CSR);
1860                 nuke(ep, -ECONNABORTED);
1861                 dev->ep0state = WAIT_FOR_SETUP;
1862                 return;
1863         }
1864
1865         /*
1866          * if a transfer is in progress && IN_PKT_RDY and OUT_PKT_RDY are clear
1867          *      - fill EP0 FIFO
1868          *      - if last packet
1869          *      -       set IN_PKT_RDY | DATA_END
1870          *      - else
1871          *              set IN_PKT_RDY
1872          */
1873         if (!(csr & (EP0_IN_PKT_RDY | EP0_OUT_PKT_RDY))) {
1874                 DEBUG_EP0("%s: IN_PKT_RDY and OUT_PKT_RDY are clear\n",
1875                           __FUNCTION__);
1876
1877                 switch (dev->ep0state) {
1878                 case DATA_STATE_XMIT:
1879                         DEBUG_EP0("continue with DATA_STATE_XMIT\n");
1880                         lh7a40x_ep0_in(dev, csr);
1881                         return;
1882                 case DATA_STATE_NEED_ZLP:
1883                         DEBUG_EP0("continue with DATA_STATE_NEED_ZLP\n");
1884                         lh7a40x_ep0_in_zlp(dev, csr);
1885                         return;
1886                 default:
1887                         /* Stall? */
1888                         DEBUG_EP0("Odd state!! state = %s\n",
1889                                   state_names[dev->ep0state]);
1890                         dev->ep0state = WAIT_FOR_SETUP;
1891                         /* nuke(ep, 0); */
1892                         /* usb_set(EP0_SEND_STALL, ep->csr1); */
1893                         break;
1894                 }
1895         }
1896
1897         /*
1898          * if SETUP_END is set
1899          *      - abort the last transfer
1900          *      - set SERVICED_SETUP_END_BIT
1901          */
1902         if (csr & EP0_SETUP_END) {
1903                 DEBUG_EP0("%s: EP0_SETUP_END is set: %x\n", __FUNCTION__, csr);
1904
1905                 usb_set(EP0_CLR_SETUP_END, USB_EP0_CSR);
1906
1907                 nuke(ep, 0);
1908                 dev->ep0state = WAIT_FOR_SETUP;
1909         }
1910
1911         /*
1912          * if EP0_OUT_PKT_RDY is set
1913          *      - read data packet from EP0 FIFO
1914          *      - decode command
1915          *      - if error
1916          *              set SERVICED_OUT_PKT_RDY | DATA_END bits | SEND_STALL
1917          *      - else
1918          *              set SERVICED_OUT_PKT_RDY | DATA_END bits
1919          */
1920         if (csr & EP0_OUT_PKT_RDY) {
1921
1922                 DEBUG_EP0("%s: EP0_OUT_PKT_RDY is set: %x\n", __FUNCTION__,
1923                           csr);
1924
1925                 switch (dev->ep0state) {
1926                 case WAIT_FOR_SETUP:
1927                         DEBUG_EP0("WAIT_FOR_SETUP\n");
1928                         lh7a40x_ep0_setup(dev, csr);
1929                         break;
1930
1931                 case DATA_STATE_RECV:
1932                         DEBUG_EP0("DATA_STATE_RECV\n");
1933                         lh7a40x_ep0_out(dev, csr);
1934                         break;
1935
1936                 default:
1937                         /* send stall? */
1938                         DEBUG_EP0("strange state!! 2. send stall? state = %d\n",
1939                                   dev->ep0state);
1940                         break;
1941                 }
1942         }
1943 }
1944
1945 static void lh7a40x_ep0_kick(struct lh7a40x_udc *dev, struct lh7a40x_ep *ep)
1946 {
1947         u32 csr;
1948
1949         usb_set_index(0);
1950         csr = usb_read(USB_EP0_CSR);
1951
1952         DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
1953
1954         /* Clear "out packet ready" */
1955         usb_set(EP0_CLR_OUT, USB_EP0_CSR);
1956
1957         if (ep_is_in(ep)) {
1958                 dev->ep0state = DATA_STATE_XMIT;
1959                 lh7a40x_ep0_in(dev, csr);
1960         } else {
1961                 dev->ep0state = DATA_STATE_RECV;
1962                 lh7a40x_ep0_out(dev, csr);
1963         }
1964 }
1965
1966 /* ---------------------------------------------------------------------------
1967  *      device-scoped parts of the api to the usb controller hardware
1968  * ---------------------------------------------------------------------------
1969  */
1970
1971 static int lh7a40x_udc_get_frame(struct usb_gadget *_gadget)
1972 {
1973         u32 frame1 = usb_read(USB_FRM_NUM1);    /* Least significant 8 bits */
1974         u32 frame2 = usb_read(USB_FRM_NUM2);    /* Most significant 3 bits */
1975         DEBUG("%s, %p\n", __FUNCTION__, _gadget);
1976         return ((frame2 & 0x07) << 8) | (frame1 & 0xff);
1977 }
1978
1979 static int lh7a40x_udc_wakeup(struct usb_gadget *_gadget)
1980 {
1981         /* host may not have enabled remote wakeup */
1982         /*if ((UDCCS0 & UDCCS0_DRWF) == 0)
1983            return -EHOSTUNREACH;
1984            udc_set_mask_UDCCR(UDCCR_RSM); */
1985         return -ENOTSUPP;
1986 }
1987
1988 static const struct usb_gadget_ops lh7a40x_udc_ops = {
1989         .get_frame = lh7a40x_udc_get_frame,
1990         .wakeup = lh7a40x_udc_wakeup,
1991         /* current versions must always be self-powered */
1992 };
1993
1994 static void nop_release(struct device *dev)
1995 {
1996         DEBUG("%s %s\n", __FUNCTION__, dev->bus_id);
1997 }
1998
1999 static struct lh7a40x_udc memory = {
2000         .usb_address = 0,
2001
2002         .gadget = {
2003                    .ops = &lh7a40x_udc_ops,
2004                    .ep0 = &memory.ep[0].ep,
2005                    .name = driver_name,
2006                    .dev = {
2007                            .bus_id = "gadget",
2008                            .release = nop_release,
2009                            },
2010                    },
2011
2012         /* control endpoint */
2013         .ep[0] = {
2014                   .ep = {
2015                          .name = ep0name,
2016                          .ops = &lh7a40x_ep_ops,
2017                          .maxpacket = EP0_PACKETSIZE,
2018                          },
2019                   .dev = &memory,
2020
2021                   .bEndpointAddress = 0,
2022                   .bmAttributes = 0,
2023
2024                   .ep_type = ep_control,
2025                   .fifo = io_p2v(USB_EP0_FIFO),
2026                   .csr1 = USB_EP0_CSR,
2027                   .csr2 = USB_EP0_CSR,
2028                   },
2029
2030         /* first group of endpoints */
2031         .ep[1] = {
2032                   .ep = {
2033                          .name = "ep1in-bulk",
2034                          .ops = &lh7a40x_ep_ops,
2035                          .maxpacket = 64,
2036                          },
2037                   .dev = &memory,
2038
2039                   .bEndpointAddress = USB_DIR_IN | 1,
2040                   .bmAttributes = USB_ENDPOINT_XFER_BULK,
2041
2042                   .ep_type = ep_bulk_in,
2043                   .fifo = io_p2v(USB_EP1_FIFO),
2044                   .csr1 = USB_IN_CSR1,
2045                   .csr2 = USB_IN_CSR2,
2046                   },
2047
2048         .ep[2] = {
2049                   .ep = {
2050                          .name = "ep2out-bulk",
2051                          .ops = &lh7a40x_ep_ops,
2052                          .maxpacket = 64,
2053                          },
2054                   .dev = &memory,
2055
2056                   .bEndpointAddress = 2,
2057                   .bmAttributes = USB_ENDPOINT_XFER_BULK,
2058
2059                   .ep_type = ep_bulk_out,
2060                   .fifo = io_p2v(USB_EP2_FIFO),
2061                   .csr1 = USB_OUT_CSR1,
2062                   .csr2 = USB_OUT_CSR2,
2063                   },
2064
2065         .ep[3] = {
2066                   .ep = {
2067                          .name = "ep3in-int",
2068                          .ops = &lh7a40x_ep_ops,
2069                          .maxpacket = 64,
2070                          },
2071                   .dev = &memory,
2072
2073                   .bEndpointAddress = USB_DIR_IN | 3,
2074                   .bmAttributes = USB_ENDPOINT_XFER_INT,
2075
2076                   .ep_type = ep_interrupt,
2077                   .fifo = io_p2v(USB_EP3_FIFO),
2078                   .csr1 = USB_IN_CSR1,
2079                   .csr2 = USB_IN_CSR2,
2080                   },
2081 };
2082
2083 /*
2084  *      probe - binds to the platform device
2085  */
2086 static int lh7a40x_udc_probe(struct device *_dev)
2087 {
2088         struct lh7a40x_udc *dev = &memory;
2089         int retval;
2090
2091         DEBUG("%s: %p\n", __FUNCTION__, _dev);
2092
2093         spin_lock_init(&dev->lock);
2094         dev->dev = _dev;
2095
2096         device_initialize(&dev->gadget.dev);
2097         dev->gadget.dev.parent = _dev;
2098
2099         the_controller = dev;
2100         dev_set_drvdata(_dev, dev);
2101
2102         udc_disable(dev);
2103         udc_reinit(dev);
2104
2105         /* irq setup after old hardware state is cleaned up */
2106         retval =
2107             request_irq(IRQ_USBINTR, lh7a40x_udc_irq, SA_INTERRUPT, driver_name,
2108                         dev);
2109         if (retval != 0) {
2110                 DEBUG(KERN_ERR "%s: can't get irq %i, err %d\n", driver_name,
2111                       IRQ_USBINTR, retval);
2112                 return -EBUSY;
2113         }
2114
2115         create_proc_files();
2116
2117         return retval;
2118 }
2119
2120 static int lh7a40x_udc_remove(struct device *_dev)
2121 {
2122         struct lh7a40x_udc *dev = _dev->driver_data;
2123
2124         DEBUG("%s: %p\n", __FUNCTION__, dev);
2125
2126         udc_disable(dev);
2127         remove_proc_files();
2128         usb_gadget_unregister_driver(dev->driver);
2129
2130         free_irq(IRQ_USBINTR, dev);
2131
2132         dev_set_drvdata(_dev, 0);
2133
2134         the_controller = 0;
2135
2136         return 0;
2137 }
2138
2139 /*-------------------------------------------------------------------------*/
2140
2141 static struct device_driver udc_driver = {
2142         .name = (char *)driver_name,
2143         .owner = THIS_MODULE,
2144         .bus = &platform_bus_type,
2145         .probe = lh7a40x_udc_probe,
2146         .remove = lh7a40x_udc_remove
2147             /* FIXME power management support */
2148             /* .suspend = ... disable UDC */
2149             /* .resume = ... re-enable UDC */
2150 };
2151
2152 static int __init udc_init(void)
2153 {
2154         DEBUG("%s: %s version %s\n", __FUNCTION__, driver_name, DRIVER_VERSION);
2155         return driver_register(&udc_driver);
2156 }
2157
2158 static void __exit udc_exit(void)
2159 {
2160         driver_unregister(&udc_driver);
2161 }
2162
2163 module_init(udc_init);
2164 module_exit(udc_exit);
2165
2166 MODULE_DESCRIPTION(DRIVER_DESC);
2167 MODULE_AUTHOR("Mikko Lahteenmaki, Bo Henriksen");
2168 MODULE_LICENSE("GPL");