Merge branch 'e1000' of ssh://198.78.49.142/srv/git/intel/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 <linux/platform_device.h>
25
26 #include "lh7a40x_udc.h"
27
28 //#define DEBUG printk
29 //#define DEBUG_EP0 printk
30 //#define DEBUG_SETUP printk
31
32 #ifndef DEBUG_EP0
33 # define DEBUG_EP0(fmt,args...)
34 #endif
35 #ifndef DEBUG_SETUP
36 # define DEBUG_SETUP(fmt,args...)
37 #endif
38 #ifndef DEBUG
39 # define NO_STATES
40 # define DEBUG(fmt,args...)
41 #endif
42
43 #define DRIVER_DESC                     "LH7A40x USB Device Controller"
44 #define DRIVER_VERSION          __DATE__
45
46 #ifndef _BIT                    /* FIXME - what happended to _BIT in 2.6.7bk18? */
47 #define _BIT(x) (1<<(x))
48 #endif
49
50 struct lh7a40x_udc *the_controller;
51
52 static const char driver_name[] = "lh7a40x_udc";
53 static const char driver_desc[] = DRIVER_DESC;
54 static const char ep0name[] = "ep0-control";
55
56 /*
57   Local definintions.
58 */
59
60 #ifndef NO_STATES
61 static char *state_names[] = {
62         "WAIT_FOR_SETUP",
63         "DATA_STATE_XMIT",
64         "DATA_STATE_NEED_ZLP",
65         "WAIT_FOR_OUT_STATUS",
66         "DATA_STATE_RECV"
67 };
68 #endif
69
70 /*
71   Local declarations.
72 */
73 static int lh7a40x_ep_enable(struct usb_ep *ep,
74                              const struct usb_endpoint_descriptor *);
75 static int lh7a40x_ep_disable(struct usb_ep *ep);
76 static struct usb_request *lh7a40x_alloc_request(struct usb_ep *ep, gfp_t);
77 static void lh7a40x_free_request(struct usb_ep *ep, struct usb_request *);
78 static void *lh7a40x_alloc_buffer(struct usb_ep *ep, unsigned, dma_addr_t *,
79                                   gfp_t);
80 static void lh7a40x_free_buffer(struct usb_ep *ep, void *, dma_addr_t,
81                                 unsigned);
82 static int lh7a40x_queue(struct usb_ep *ep, struct usb_request *, gfp_t);
83 static int lh7a40x_dequeue(struct usb_ep *ep, struct usb_request *);
84 static int lh7a40x_set_halt(struct usb_ep *ep, int);
85 static int lh7a40x_fifo_status(struct usb_ep *ep);
86 static int lh7a40x_fifo_status(struct usb_ep *ep);
87 static void lh7a40x_fifo_flush(struct usb_ep *ep);
88 static void lh7a40x_ep0_kick(struct lh7a40x_udc *dev, struct lh7a40x_ep *ep);
89 static void lh7a40x_handle_ep0(struct lh7a40x_udc *dev, u32 intr);
90
91 static void done(struct lh7a40x_ep *ep, struct lh7a40x_request *req,
92                  int status);
93 static void pio_irq_enable(int bEndpointAddress);
94 static void pio_irq_disable(int bEndpointAddress);
95 static void stop_activity(struct lh7a40x_udc *dev,
96                           struct usb_gadget_driver *driver);
97 static void flush(struct lh7a40x_ep *ep);
98 static void udc_enable(struct lh7a40x_udc *dev);
99 static void udc_set_address(struct lh7a40x_udc *dev, unsigned char address);
100
101 static struct usb_ep_ops lh7a40x_ep_ops = {
102         .enable = lh7a40x_ep_enable,
103         .disable = lh7a40x_ep_disable,
104
105         .alloc_request = lh7a40x_alloc_request,
106         .free_request = lh7a40x_free_request,
107
108         .alloc_buffer = lh7a40x_alloc_buffer,
109         .free_buffer = lh7a40x_free_buffer,
110
111         .queue = lh7a40x_queue,
112         .dequeue = lh7a40x_dequeue,
113
114         .set_halt = lh7a40x_set_halt,
115         .fifo_status = lh7a40x_fifo_status,
116         .fifo_flush = lh7a40x_fifo_flush,
117 };
118
119 /* Inline code */
120
121 static __inline__ int write_packet(struct lh7a40x_ep *ep,
122                                    struct lh7a40x_request *req, int max)
123 {
124         u8 *buf;
125         int length, count;
126         volatile u32 *fifo = (volatile u32 *)ep->fifo;
127
128         buf = req->req.buf + req->req.actual;
129         prefetch(buf);
130
131         length = req->req.length - req->req.actual;
132         length = min(length, max);
133         req->req.actual += length;
134
135         DEBUG("Write %d (max %d), fifo %p\n", length, max, fifo);
136
137         count = length;
138         while (count--) {
139                 *fifo = *buf++;
140         }
141
142         return length;
143 }
144
145 static __inline__ void usb_set_index(u32 ep)
146 {
147         *(volatile u32 *)io_p2v(USB_INDEX) = ep;
148 }
149
150 static __inline__ u32 usb_read(u32 port)
151 {
152         return *(volatile u32 *)io_p2v(port);
153 }
154
155 static __inline__ void usb_write(u32 val, u32 port)
156 {
157         *(volatile u32 *)io_p2v(port) = val;
158 }
159
160 static __inline__ void usb_set(u32 val, u32 port)
161 {
162         volatile u32 *ioport = (volatile u32 *)io_p2v(port);
163         u32 after = (*ioport) | val;
164         *ioport = after;
165 }
166
167 static __inline__ void usb_clear(u32 val, u32 port)
168 {
169         volatile u32 *ioport = (volatile u32 *)io_p2v(port);
170         u32 after = (*ioport) & ~val;
171         *ioport = after;
172 }
173
174 /*-------------------------------------------------------------------------*/
175
176 #define GPIO_PORTC_DR   (0x80000E08)
177 #define GPIO_PORTC_DDR  (0x80000E18)
178 #define GPIO_PORTC_PDR  (0x80000E70)
179
180 /* get port C pin data register */
181 #define get_portc_pdr(bit)              ((usb_read(GPIO_PORTC_PDR) & _BIT(bit)) != 0)
182 /* get port C data direction register */
183 #define get_portc_ddr(bit)              ((usb_read(GPIO_PORTC_DDR) & _BIT(bit)) != 0)
184 /* set port C data register */
185 #define set_portc_dr(bit, val)  (val ? usb_set(_BIT(bit), GPIO_PORTC_DR) : usb_clear(_BIT(bit), GPIO_PORTC_DR))
186 /* set port C data direction register */
187 #define set_portc_ddr(bit, val) (val ? usb_set(_BIT(bit), GPIO_PORTC_DDR) : usb_clear(_BIT(bit), GPIO_PORTC_DDR))
188
189 /*
190  * LPD7A404 GPIO's:
191  * Port C bit 1 = USB Port 1 Power Enable
192  * Port C bit 2 = USB Port 1 Data Carrier Detect
193  */
194 #define is_usb_connected()              get_portc_pdr(2)
195
196 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
197
198 static const char proc_node_name[] = "driver/udc";
199
200 static int
201 udc_proc_read(char *page, char **start, off_t off, int count,
202               int *eof, void *_dev)
203 {
204         char *buf = page;
205         struct lh7a40x_udc *dev = _dev;
206         char *next = buf;
207         unsigned size = count;
208         unsigned long flags;
209         int t;
210
211         if (off != 0)
212                 return 0;
213
214         local_irq_save(flags);
215
216         /* basic device status */
217         t = scnprintf(next, size,
218                       DRIVER_DESC "\n"
219                       "%s version: %s\n"
220                       "Gadget driver: %s\n"
221                       "Host: %s\n\n",
222                       driver_name, DRIVER_VERSION,
223                       dev->driver ? dev->driver->driver.name : "(none)",
224                       is_usb_connected()? "full speed" : "disconnected");
225         size -= t;
226         next += t;
227
228         t = scnprintf(next, size,
229                       "GPIO:\n"
230                       " Port C bit 1: %d, dir %d\n"
231                       " Port C bit 2: %d, dir %d\n\n",
232                       get_portc_pdr(1), get_portc_ddr(1),
233                       get_portc_pdr(2), get_portc_ddr(2)
234             );
235         size -= t;
236         next += t;
237
238         t = scnprintf(next, size,
239                       "DCP pullup: %d\n\n",
240                       (usb_read(USB_PM) & PM_USB_DCP) != 0);
241         size -= t;
242         next += t;
243
244         local_irq_restore(flags);
245         *eof = 1;
246         return count - size;
247 }
248
249 #define create_proc_files()     create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev)
250 #define remove_proc_files()     remove_proc_entry(proc_node_name, NULL)
251
252 #else   /* !CONFIG_USB_GADGET_DEBUG_FILES */
253
254 #define create_proc_files() do {} while (0)
255 #define remove_proc_files() do {} while (0)
256
257 #endif  /* CONFIG_USB_GADGET_DEBUG_FILES */
258
259 /*
260  *      udc_disable - disable USB device controller
261  */
262 static void udc_disable(struct lh7a40x_udc *dev)
263 {
264         DEBUG("%s, %p\n", __FUNCTION__, dev);
265
266         udc_set_address(dev, 0);
267
268         /* Disable interrupts */
269         usb_write(0, USB_IN_INT_EN);
270         usb_write(0, USB_OUT_INT_EN);
271         usb_write(0, USB_INT_EN);
272
273         /* Disable the USB */
274         usb_write(0, USB_PM);
275
276 #ifdef CONFIG_ARCH_LH7A404
277         /* Disable USB power */
278         set_portc_dr(1, 0);
279 #endif
280
281         /* if hardware supports it, disconnect from usb */
282         /* make_usb_disappear(); */
283
284         dev->ep0state = WAIT_FOR_SETUP;
285         dev->gadget.speed = USB_SPEED_UNKNOWN;
286         dev->usb_address = 0;
287 }
288
289 /*
290  *      udc_reinit - initialize software state
291  */
292 static void udc_reinit(struct lh7a40x_udc *dev)
293 {
294         u32 i;
295
296         DEBUG("%s, %p\n", __FUNCTION__, dev);
297
298         /* device/ep0 records init */
299         INIT_LIST_HEAD(&dev->gadget.ep_list);
300         INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
301         dev->ep0state = WAIT_FOR_SETUP;
302
303         /* basic endpoint records init */
304         for (i = 0; i < UDC_MAX_ENDPOINTS; i++) {
305                 struct lh7a40x_ep *ep = &dev->ep[i];
306
307                 if (i != 0)
308                         list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
309
310                 ep->desc = 0;
311                 ep->stopped = 0;
312                 INIT_LIST_HEAD(&ep->queue);
313                 ep->pio_irqs = 0;
314         }
315
316         /* the rest was statically initialized, and is read-only */
317 }
318
319 #define BYTES2MAXP(x)   (x / 8)
320 #define MAXP2BYTES(x)   (x * 8)
321
322 /* until it's enabled, this UDC should be completely invisible
323  * to any USB host.
324  */
325 static void udc_enable(struct lh7a40x_udc *dev)
326 {
327         int ep;
328
329         DEBUG("%s, %p\n", __FUNCTION__, dev);
330
331         dev->gadget.speed = USB_SPEED_UNKNOWN;
332
333 #ifdef CONFIG_ARCH_LH7A404
334         /* Set Port C bit 1 & 2 as output */
335         set_portc_ddr(1, 1);
336         set_portc_ddr(2, 1);
337
338         /* Enable USB power */
339         set_portc_dr(1, 0);
340 #endif
341
342         /*
343          * C.f Chapter 18.1.3.1 Initializing the USB
344          */
345
346         /* Disable the USB */
347         usb_clear(PM_USB_ENABLE, USB_PM);
348
349         /* Reset APB & I/O sides of the USB */
350         usb_set(USB_RESET_APB | USB_RESET_IO, USB_RESET);
351         mdelay(5);
352         usb_clear(USB_RESET_APB | USB_RESET_IO, USB_RESET);
353
354         /* Set MAXP values for each */
355         for (ep = 0; ep < UDC_MAX_ENDPOINTS; ep++) {
356                 struct lh7a40x_ep *ep_reg = &dev->ep[ep];
357                 u32 csr;
358
359                 usb_set_index(ep);
360
361                 switch (ep_reg->ep_type) {
362                 case ep_bulk_in:
363                 case ep_interrupt:
364                         usb_clear(USB_IN_CSR2_USB_DMA_EN | USB_IN_CSR2_AUTO_SET,
365                                   ep_reg->csr2);
366                         /* Fall through */
367                 case ep_control:
368                         usb_write(BYTES2MAXP(ep_maxpacket(ep_reg)),
369                                   USB_IN_MAXP);
370                         break;
371                 case ep_bulk_out:
372                         usb_clear(USB_OUT_CSR2_USB_DMA_EN |
373                                   USB_OUT_CSR2_AUTO_CLR, ep_reg->csr2);
374                         usb_write(BYTES2MAXP(ep_maxpacket(ep_reg)),
375                                   USB_OUT_MAXP);
376                         break;
377                 }
378
379                 /* Read & Write CSR1, just in case */
380                 csr = usb_read(ep_reg->csr1);
381                 usb_write(csr, ep_reg->csr1);
382
383                 flush(ep_reg);
384         }
385
386         /* Disable interrupts */
387         usb_write(0, USB_IN_INT_EN);
388         usb_write(0, USB_OUT_INT_EN);
389         usb_write(0, USB_INT_EN);
390
391         /* Enable interrupts */
392         usb_set(USB_IN_INT_EP0, USB_IN_INT_EN);
393         usb_set(USB_INT_RESET_INT | USB_INT_RESUME_INT, USB_INT_EN);
394         /* Dont enable rest of the interrupts */
395         /* usb_set(USB_IN_INT_EP3 | USB_IN_INT_EP1 | USB_IN_INT_EP0, USB_IN_INT_EN);
396            usb_set(USB_OUT_INT_EP2, USB_OUT_INT_EN); */
397
398         /* Enable SUSPEND */
399         usb_set(PM_ENABLE_SUSPEND, USB_PM);
400
401         /* Enable the USB */
402         usb_set(PM_USB_ENABLE, USB_PM);
403
404 #ifdef CONFIG_ARCH_LH7A404
405         /* NOTE: DOES NOT WORK! */
406         /* Let host detect UDC:
407          * Software must write a 0 to the PMR:DCP_CTRL bit to turn this
408          * transistor on and pull the USBDP pin HIGH.
409          */
410         /* usb_clear(PM_USB_DCP, USB_PM);
411            usb_set(PM_USB_DCP, USB_PM); */
412 #endif
413 }
414
415 /*
416   Register entry point for the peripheral controller driver.
417 */
418 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
419 {
420         struct lh7a40x_udc *dev = the_controller;
421         int retval;
422
423         DEBUG("%s: %s\n", __FUNCTION__, driver->driver.name);
424
425         if (!driver
426             || driver->speed != USB_SPEED_FULL
427             || !driver->bind
428             || !driver->unbind || !driver->disconnect || !driver->setup)
429                 return -EINVAL;
430         if (!dev)
431                 return -ENODEV;
432         if (dev->driver)
433                 return -EBUSY;
434
435         /* first hook up the driver ... */
436         dev->driver = driver;
437         dev->gadget.dev.driver = &driver->driver;
438
439         device_add(&dev->gadget.dev);
440         retval = driver->bind(&dev->gadget);
441         if (retval) {
442                 printk("%s: bind to driver %s --> error %d\n", dev->gadget.name,
443                        driver->driver.name, retval);
444                 device_del(&dev->gadget.dev);
445
446                 dev->driver = 0;
447                 dev->gadget.dev.driver = 0;
448                 return retval;
449         }
450
451         /* ... then enable host detection and ep0; and we're ready
452          * for set_configuration as well as eventual disconnect.
453          * NOTE:  this shouldn't power up until later.
454          */
455         printk("%s: registered gadget driver '%s'\n", dev->gadget.name,
456                driver->driver.name);
457
458         udc_enable(dev);
459
460         return 0;
461 }
462
463 EXPORT_SYMBOL(usb_gadget_register_driver);
464
465 /*
466   Unregister entry point for the peripheral controller driver.
467 */
468 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
469 {
470         struct lh7a40x_udc *dev = the_controller;
471         unsigned long flags;
472
473         if (!dev)
474                 return -ENODEV;
475         if (!driver || driver != dev->driver)
476                 return -EINVAL;
477
478         spin_lock_irqsave(&dev->lock, flags);
479         dev->driver = 0;
480         stop_activity(dev, driver);
481         spin_unlock_irqrestore(&dev->lock, flags);
482
483         driver->unbind(&dev->gadget);
484         device_del(&dev->gadget.dev);
485
486         udc_disable(dev);
487
488         DEBUG("unregistered gadget driver '%s'\n", driver->driver.name);
489         return 0;
490 }
491
492 EXPORT_SYMBOL(usb_gadget_unregister_driver);
493
494 /*-------------------------------------------------------------------------*/
495
496 /** Write request to FIFO (max write == maxp size)
497  *  Return:  0 = still running, 1 = completed, negative = errno
498  *  NOTE: INDEX register must be set for EP
499  */
500 static int write_fifo(struct lh7a40x_ep *ep, struct lh7a40x_request *req)
501 {
502         u32 max;
503         u32 csr;
504
505         max = le16_to_cpu(ep->desc->wMaxPacketSize);
506
507         csr = usb_read(ep->csr1);
508         DEBUG("CSR: %x %d\n", csr, csr & USB_IN_CSR1_FIFO_NOT_EMPTY);
509
510         if (!(csr & USB_IN_CSR1_FIFO_NOT_EMPTY)) {
511                 unsigned count;
512                 int is_last, is_short;
513
514                 count = write_packet(ep, req, max);
515                 usb_set(USB_IN_CSR1_IN_PKT_RDY, ep->csr1);
516
517                 /* last packet is usually short (or a zlp) */
518                 if (unlikely(count != max))
519                         is_last = is_short = 1;
520                 else {
521                         if (likely(req->req.length != req->req.actual)
522                             || req->req.zero)
523                                 is_last = 0;
524                         else
525                                 is_last = 1;
526                         /* interrupt/iso maxpacket may not fill the fifo */
527                         is_short = unlikely(max < ep_maxpacket(ep));
528                 }
529
530                 DEBUG("%s: wrote %s %d bytes%s%s %d left %p\n", __FUNCTION__,
531                       ep->ep.name, count,
532                       is_last ? "/L" : "", is_short ? "/S" : "",
533                       req->req.length - req->req.actual, req);
534
535                 /* requests complete when all IN data is in the FIFO */
536                 if (is_last) {
537                         done(ep, req, 0);
538                         if (list_empty(&ep->queue)) {
539                                 pio_irq_disable(ep_index(ep));
540                         }
541                         return 1;
542                 }
543         } else {
544                 DEBUG("Hmm.. %d ep FIFO is not empty!\n", ep_index(ep));
545         }
546
547         return 0;
548 }
549
550 /** Read to request from FIFO (max read == bytes in fifo)
551  *  Return:  0 = still running, 1 = completed, negative = errno
552  *  NOTE: INDEX register must be set for EP
553  */
554 static int read_fifo(struct lh7a40x_ep *ep, struct lh7a40x_request *req)
555 {
556         u32 csr;
557         u8 *buf;
558         unsigned bufferspace, count, is_short;
559         volatile u32 *fifo = (volatile u32 *)ep->fifo;
560
561         /* make sure there's a packet in the FIFO. */
562         csr = usb_read(ep->csr1);
563         if (!(csr & USB_OUT_CSR1_OUT_PKT_RDY)) {
564                 DEBUG("%s: Packet NOT ready!\n", __FUNCTION__);
565                 return -EINVAL;
566         }
567
568         buf = req->req.buf + req->req.actual;
569         prefetchw(buf);
570         bufferspace = req->req.length - req->req.actual;
571
572         /* read all bytes from this packet */
573         count = usb_read(USB_OUT_FIFO_WC1);
574         req->req.actual += min(count, bufferspace);
575
576         is_short = (count < ep->ep.maxpacket);
577         DEBUG("read %s %02x, %d bytes%s req %p %d/%d\n",
578               ep->ep.name, csr, count,
579               is_short ? "/S" : "", req, req->req.actual, req->req.length);
580
581         while (likely(count-- != 0)) {
582                 u8 byte = (u8) (*fifo & 0xff);
583
584                 if (unlikely(bufferspace == 0)) {
585                         /* this happens when the driver's buffer
586                          * is smaller than what the host sent.
587                          * discard the extra data.
588                          */
589                         if (req->req.status != -EOVERFLOW)
590                                 printk("%s overflow %d\n", ep->ep.name, count);
591                         req->req.status = -EOVERFLOW;
592                 } else {
593                         *buf++ = byte;
594                         bufferspace--;
595                 }
596         }
597
598         usb_clear(USB_OUT_CSR1_OUT_PKT_RDY, ep->csr1);
599
600         /* completion */
601         if (is_short || req->req.actual == req->req.length) {
602                 done(ep, req, 0);
603                 usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1);
604
605                 if (list_empty(&ep->queue))
606                         pio_irq_disable(ep_index(ep));
607                 return 1;
608         }
609
610         /* finished that packet.  the next one may be waiting... */
611         return 0;
612 }
613
614 /*
615  *      done - retire a request; caller blocked irqs
616  *  INDEX register is preserved to keep same
617  */
618 static void done(struct lh7a40x_ep *ep, struct lh7a40x_request *req, int status)
619 {
620         unsigned int stopped = ep->stopped;
621         u32 index;
622
623         DEBUG("%s, %p\n", __FUNCTION__, ep);
624         list_del_init(&req->queue);
625
626         if (likely(req->req.status == -EINPROGRESS))
627                 req->req.status = status;
628         else
629                 status = req->req.status;
630
631         if (status && status != -ESHUTDOWN)
632                 DEBUG("complete %s req %p stat %d len %u/%u\n",
633                       ep->ep.name, &req->req, status,
634                       req->req.actual, req->req.length);
635
636         /* don't modify queue heads during completion callback */
637         ep->stopped = 1;
638         /* Read current index (completion may modify it) */
639         index = usb_read(USB_INDEX);
640
641         spin_unlock(&ep->dev->lock);
642         req->req.complete(&ep->ep, &req->req);
643         spin_lock(&ep->dev->lock);
644
645         /* Restore index */
646         usb_set_index(index);
647         ep->stopped = stopped;
648 }
649
650 /** Enable EP interrupt */
651 static void pio_irq_enable(int ep)
652 {
653         DEBUG("%s: %d\n", __FUNCTION__, ep);
654
655         switch (ep) {
656         case 1:
657                 usb_set(USB_IN_INT_EP1, USB_IN_INT_EN);
658                 break;
659         case 2:
660                 usb_set(USB_OUT_INT_EP2, USB_OUT_INT_EN);
661                 break;
662         case 3:
663                 usb_set(USB_IN_INT_EP3, USB_IN_INT_EN);
664                 break;
665         default:
666                 DEBUG("Unknown endpoint: %d\n", ep);
667                 break;
668         }
669 }
670
671 /** Disable EP interrupt */
672 static void pio_irq_disable(int ep)
673 {
674         DEBUG("%s: %d\n", __FUNCTION__, ep);
675
676         switch (ep) {
677         case 1:
678                 usb_clear(USB_IN_INT_EP1, USB_IN_INT_EN);
679                 break;
680         case 2:
681                 usb_clear(USB_OUT_INT_EP2, USB_OUT_INT_EN);
682                 break;
683         case 3:
684                 usb_clear(USB_IN_INT_EP3, USB_IN_INT_EN);
685                 break;
686         default:
687                 DEBUG("Unknown endpoint: %d\n", ep);
688                 break;
689         }
690 }
691
692 /*
693  *      nuke - dequeue ALL requests
694  */
695 void nuke(struct lh7a40x_ep *ep, int status)
696 {
697         struct lh7a40x_request *req;
698
699         DEBUG("%s, %p\n", __FUNCTION__, ep);
700
701         /* Flush FIFO */
702         flush(ep);
703
704         /* called with irqs blocked */
705         while (!list_empty(&ep->queue)) {
706                 req = list_entry(ep->queue.next, struct lh7a40x_request, queue);
707                 done(ep, req, status);
708         }
709
710         /* Disable IRQ if EP is enabled (has descriptor) */
711         if (ep->desc)
712                 pio_irq_disable(ep_index(ep));
713 }
714
715 /*
716 void nuke_all(struct lh7a40x_udc *dev)
717 {
718         int n;
719         for(n=0; n<UDC_MAX_ENDPOINTS; n++) {
720                 struct lh7a40x_ep *ep = &dev->ep[n];
721                 usb_set_index(n);
722                 nuke(ep, 0);
723         }
724 }*/
725
726 /*
727 static void flush_all(struct lh7a40x_udc *dev)
728 {
729         int n;
730     for (n = 0; n < UDC_MAX_ENDPOINTS; n++)
731     {
732                 struct lh7a40x_ep *ep = &dev->ep[n];
733                 flush(ep);
734     }
735 }
736 */
737
738 /** Flush EP
739  * NOTE: INDEX register must be set before this call
740  */
741 static void flush(struct lh7a40x_ep *ep)
742 {
743         DEBUG("%s, %p\n", __FUNCTION__, ep);
744
745         switch (ep->ep_type) {
746         case ep_control:
747                 /* check, by implication c.f. 15.1.2.11 */
748                 break;
749
750         case ep_bulk_in:
751         case ep_interrupt:
752                 /* if(csr & USB_IN_CSR1_IN_PKT_RDY) */
753                 usb_set(USB_IN_CSR1_FIFO_FLUSH, ep->csr1);
754                 break;
755
756         case ep_bulk_out:
757                 /* if(csr & USB_OUT_CSR1_OUT_PKT_RDY) */
758                 usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1);
759                 break;
760         }
761 }
762
763 /**
764  * lh7a40x_in_epn - handle IN interrupt
765  */
766 static void lh7a40x_in_epn(struct lh7a40x_udc *dev, u32 ep_idx, u32 intr)
767 {
768         u32 csr;
769         struct lh7a40x_ep *ep = &dev->ep[ep_idx];
770         struct lh7a40x_request *req;
771
772         usb_set_index(ep_idx);
773
774         csr = usb_read(ep->csr1);
775         DEBUG("%s: %d, csr %x\n", __FUNCTION__, ep_idx, csr);
776
777         if (csr & USB_IN_CSR1_SENT_STALL) {
778                 DEBUG("USB_IN_CSR1_SENT_STALL\n");
779                 usb_set(USB_IN_CSR1_SENT_STALL /*|USB_IN_CSR1_SEND_STALL */ ,
780                         ep->csr1);
781                 return;
782         }
783
784         if (!ep->desc) {
785                 DEBUG("%s: NO EP DESC\n", __FUNCTION__);
786                 return;
787         }
788
789         if (list_empty(&ep->queue))
790                 req = 0;
791         else
792                 req = list_entry(ep->queue.next, struct lh7a40x_request, queue);
793
794         DEBUG("req: %p\n", req);
795
796         if (!req)
797                 return;
798
799         write_fifo(ep, req);
800 }
801
802 /* ********************************************************************************************* */
803 /* Bulk OUT (recv)
804  */
805
806 static void lh7a40x_out_epn(struct lh7a40x_udc *dev, u32 ep_idx, u32 intr)
807 {
808         struct lh7a40x_ep *ep = &dev->ep[ep_idx];
809         struct lh7a40x_request *req;
810
811         DEBUG("%s: %d\n", __FUNCTION__, ep_idx);
812
813         usb_set_index(ep_idx);
814
815         if (ep->desc) {
816                 u32 csr;
817                 csr = usb_read(ep->csr1);
818
819                 while ((csr =
820                         usb_read(ep->
821                                  csr1)) & (USB_OUT_CSR1_OUT_PKT_RDY |
822                                            USB_OUT_CSR1_SENT_STALL)) {
823                         DEBUG("%s: %x\n", __FUNCTION__, csr);
824
825                         if (csr & USB_OUT_CSR1_SENT_STALL) {
826                                 DEBUG("%s: stall sent, flush fifo\n",
827                                       __FUNCTION__);
828                                 /* usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1); */
829                                 flush(ep);
830                         } else if (csr & USB_OUT_CSR1_OUT_PKT_RDY) {
831                                 if (list_empty(&ep->queue))
832                                         req = 0;
833                                 else
834                                         req =
835                                             list_entry(ep->queue.next,
836                                                        struct lh7a40x_request,
837                                                        queue);
838
839                                 if (!req) {
840                                         printk("%s: NULL REQ %d\n",
841                                                __FUNCTION__, ep_idx);
842                                         flush(ep);
843                                         break;
844                                 } else {
845                                         read_fifo(ep, req);
846                                 }
847                         }
848
849                 }
850
851         } else {
852                 /* Throw packet away.. */
853                 printk("%s: No descriptor?!?\n", __FUNCTION__);
854                 flush(ep);
855         }
856 }
857
858 static void stop_activity(struct lh7a40x_udc *dev,
859                           struct usb_gadget_driver *driver)
860 {
861         int i;
862
863         /* don't disconnect drivers more than once */
864         if (dev->gadget.speed == USB_SPEED_UNKNOWN)
865                 driver = 0;
866         dev->gadget.speed = USB_SPEED_UNKNOWN;
867
868         /* prevent new request submissions, kill any outstanding requests  */
869         for (i = 0; i < UDC_MAX_ENDPOINTS; i++) {
870                 struct lh7a40x_ep *ep = &dev->ep[i];
871                 ep->stopped = 1;
872
873                 usb_set_index(i);
874                 nuke(ep, -ESHUTDOWN);
875         }
876
877         /* report disconnect; the driver is already quiesced */
878         if (driver) {
879                 spin_unlock(&dev->lock);
880                 driver->disconnect(&dev->gadget);
881                 spin_lock(&dev->lock);
882         }
883
884         /* re-init driver-visible data structures */
885         udc_reinit(dev);
886 }
887
888 /** Handle USB RESET interrupt
889  */
890 static void lh7a40x_reset_intr(struct lh7a40x_udc *dev)
891 {
892 #if 0                           /* def CONFIG_ARCH_LH7A404 */
893         /* Does not work always... */
894
895         DEBUG("%s: %d\n", __FUNCTION__, dev->usb_address);
896
897         if (!dev->usb_address) {
898                 /*usb_set(USB_RESET_IO, USB_RESET);
899                    mdelay(5);
900                    usb_clear(USB_RESET_IO, USB_RESET); */
901                 return;
902         }
903         /* Put the USB controller into reset. */
904         usb_set(USB_RESET_IO, USB_RESET);
905
906         /* Set Device ID to 0 */
907         udc_set_address(dev, 0);
908
909         /* Let PLL2 settle down */
910         mdelay(5);
911
912         /* Release the USB controller from reset */
913         usb_clear(USB_RESET_IO, USB_RESET);
914
915         /* Re-enable UDC */
916         udc_enable(dev);
917
918 #endif
919         dev->gadget.speed = USB_SPEED_FULL;
920 }
921
922 /*
923  *      lh7a40x usb client interrupt handler.
924  */
925 static irqreturn_t lh7a40x_udc_irq(int irq, void *_dev, struct pt_regs *r)
926 {
927         struct lh7a40x_udc *dev = _dev;
928
929         DEBUG("\n\n");
930
931         spin_lock(&dev->lock);
932
933         for (;;) {
934                 u32 intr_in = usb_read(USB_IN_INT);
935                 u32 intr_out = usb_read(USB_OUT_INT);
936                 u32 intr_int = usb_read(USB_INT);
937
938                 /* Test also against enable bits.. (lh7a40x errata).. Sigh.. */
939                 u32 in_en = usb_read(USB_IN_INT_EN);
940                 u32 out_en = usb_read(USB_OUT_INT_EN);
941
942                 if (!intr_out && !intr_in && !intr_int)
943                         break;
944
945                 DEBUG("%s (on state %s)\n", __FUNCTION__,
946                       state_names[dev->ep0state]);
947                 DEBUG("intr_out = %x\n", intr_out);
948                 DEBUG("intr_in  = %x\n", intr_in);
949                 DEBUG("intr_int = %x\n", intr_int);
950
951                 if (intr_in) {
952                         usb_write(intr_in, USB_IN_INT);
953
954                         if ((intr_in & USB_IN_INT_EP1)
955                             && (in_en & USB_IN_INT_EP1)) {
956                                 DEBUG("USB_IN_INT_EP1\n");
957                                 lh7a40x_in_epn(dev, 1, intr_in);
958                         }
959                         if ((intr_in & USB_IN_INT_EP3)
960                             && (in_en & USB_IN_INT_EP3)) {
961                                 DEBUG("USB_IN_INT_EP3\n");
962                                 lh7a40x_in_epn(dev, 3, intr_in);
963                         }
964                         if (intr_in & USB_IN_INT_EP0) {
965                                 DEBUG("USB_IN_INT_EP0 (control)\n");
966                                 lh7a40x_handle_ep0(dev, intr_in);
967                         }
968                 }
969
970                 if (intr_out) {
971                         usb_write(intr_out, USB_OUT_INT);
972
973                         if ((intr_out & USB_OUT_INT_EP2)
974                             && (out_en & USB_OUT_INT_EP2)) {
975                                 DEBUG("USB_OUT_INT_EP2\n");
976                                 lh7a40x_out_epn(dev, 2, intr_out);
977                         }
978                 }
979
980                 if (intr_int) {
981                         usb_write(intr_int, USB_INT);
982
983                         if (intr_int & USB_INT_RESET_INT) {
984                                 lh7a40x_reset_intr(dev);
985                         }
986
987                         if (intr_int & USB_INT_RESUME_INT) {
988                                 DEBUG("USB resume\n");
989
990                                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
991                                     && dev->driver
992                                     && dev->driver->resume
993                                     && is_usb_connected()) {
994                                         dev->driver->resume(&dev->gadget);
995                                 }
996                         }
997
998                         if (intr_int & USB_INT_SUSPEND_INT) {
999                                 DEBUG("USB suspend%s\n",
1000                                       is_usb_connected()? "" : "+disconnect");
1001                                 if (!is_usb_connected()) {
1002                                         stop_activity(dev, dev->driver);
1003                                 } else if (dev->gadget.speed !=
1004                                            USB_SPEED_UNKNOWN && dev->driver
1005                                            && dev->driver->suspend) {
1006                                         dev->driver->suspend(&dev->gadget);
1007                                 }
1008                         }
1009
1010                 }
1011         }
1012
1013         spin_unlock(&dev->lock);
1014
1015         return IRQ_HANDLED;
1016 }
1017
1018 static int lh7a40x_ep_enable(struct usb_ep *_ep,
1019                              const struct usb_endpoint_descriptor *desc)
1020 {
1021         struct lh7a40x_ep *ep;
1022         struct lh7a40x_udc *dev;
1023         unsigned long flags;
1024
1025         DEBUG("%s, %p\n", __FUNCTION__, _ep);
1026
1027         ep = container_of(_ep, struct lh7a40x_ep, ep);
1028         if (!_ep || !desc || ep->desc || _ep->name == ep0name
1029             || desc->bDescriptorType != USB_DT_ENDPOINT
1030             || ep->bEndpointAddress != desc->bEndpointAddress
1031             || ep_maxpacket(ep) < le16_to_cpu(desc->wMaxPacketSize)) {
1032                 DEBUG("%s, bad ep or descriptor\n", __FUNCTION__);
1033                 return -EINVAL;
1034         }
1035
1036         /* xfer types must match, except that interrupt ~= bulk */
1037         if (ep->bmAttributes != desc->bmAttributes
1038             && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
1039             && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
1040                 DEBUG("%s, %s type mismatch\n", __FUNCTION__, _ep->name);
1041                 return -EINVAL;
1042         }
1043
1044         /* hardware _could_ do smaller, but driver doesn't */
1045         if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
1046              && le16_to_cpu(desc->wMaxPacketSize) != ep_maxpacket(ep))
1047             || !desc->wMaxPacketSize) {
1048                 DEBUG("%s, bad %s maxpacket\n", __FUNCTION__, _ep->name);
1049                 return -ERANGE;
1050         }
1051
1052         dev = ep->dev;
1053         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
1054                 DEBUG("%s, bogus device state\n", __FUNCTION__);
1055                 return -ESHUTDOWN;
1056         }
1057
1058         spin_lock_irqsave(&ep->dev->lock, flags);
1059
1060         ep->stopped = 0;
1061         ep->desc = desc;
1062         ep->pio_irqs = 0;
1063         ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
1064
1065         spin_unlock_irqrestore(&ep->dev->lock, flags);
1066
1067         /* Reset halt state (does flush) */
1068         lh7a40x_set_halt(_ep, 0);
1069
1070         DEBUG("%s: enabled %s\n", __FUNCTION__, _ep->name);
1071         return 0;
1072 }
1073
1074 /** Disable EP
1075  *  NOTE: Sets INDEX register
1076  */
1077 static int lh7a40x_ep_disable(struct usb_ep *_ep)
1078 {
1079         struct lh7a40x_ep *ep;
1080         unsigned long flags;
1081
1082         DEBUG("%s, %p\n", __FUNCTION__, _ep);
1083
1084         ep = container_of(_ep, struct lh7a40x_ep, ep);
1085         if (!_ep || !ep->desc) {
1086                 DEBUG("%s, %s not enabled\n", __FUNCTION__,
1087                       _ep ? ep->ep.name : NULL);
1088                 return -EINVAL;
1089         }
1090
1091         spin_lock_irqsave(&ep->dev->lock, flags);
1092
1093         usb_set_index(ep_index(ep));
1094
1095         /* Nuke all pending requests (does flush) */
1096         nuke(ep, -ESHUTDOWN);
1097
1098         /* Disable ep IRQ */
1099         pio_irq_disable(ep_index(ep));
1100
1101         ep->desc = 0;
1102         ep->stopped = 1;
1103
1104         spin_unlock_irqrestore(&ep->dev->lock, flags);
1105
1106         DEBUG("%s: disabled %s\n", __FUNCTION__, _ep->name);
1107         return 0;
1108 }
1109
1110 static struct usb_request *lh7a40x_alloc_request(struct usb_ep *ep,
1111                                                  gfp_t gfp_flags)
1112 {
1113         struct lh7a40x_request *req;
1114
1115         DEBUG("%s, %p\n", __FUNCTION__, ep);
1116
1117         req = kmalloc(sizeof *req, gfp_flags);
1118         if (!req)
1119                 return 0;
1120
1121         memset(req, 0, sizeof *req);
1122         INIT_LIST_HEAD(&req->queue);
1123
1124         return &req->req;
1125 }
1126
1127 static void lh7a40x_free_request(struct usb_ep *ep, struct usb_request *_req)
1128 {
1129         struct lh7a40x_request *req;
1130
1131         DEBUG("%s, %p\n", __FUNCTION__, ep);
1132
1133         req = container_of(_req, struct lh7a40x_request, req);
1134         WARN_ON(!list_empty(&req->queue));
1135         kfree(req);
1136 }
1137
1138 static void *lh7a40x_alloc_buffer(struct usb_ep *ep, unsigned bytes,
1139                                   dma_addr_t * dma, gfp_t gfp_flags)
1140 {
1141         char *retval;
1142
1143         DEBUG("%s (%p, %d, %d)\n", __FUNCTION__, ep, bytes, gfp_flags);
1144
1145         retval = kmalloc(bytes, gfp_flags & ~(__GFP_DMA | __GFP_HIGHMEM));
1146         if (retval)
1147                 *dma = virt_to_bus(retval);
1148         return retval;
1149 }
1150
1151 static void lh7a40x_free_buffer(struct usb_ep *ep, void *buf, dma_addr_t dma,
1152                                 unsigned bytes)
1153 {
1154         DEBUG("%s, %p\n", __FUNCTION__, ep);
1155         kfree(buf);
1156 }
1157
1158 /** Queue one request
1159  *  Kickstart transfer if needed
1160  *  NOTE: Sets INDEX register
1161  */
1162 static int lh7a40x_queue(struct usb_ep *_ep, struct usb_request *_req,
1163                          gfp_t gfp_flags)
1164 {
1165         struct lh7a40x_request *req;
1166         struct lh7a40x_ep *ep;
1167         struct lh7a40x_udc *dev;
1168         unsigned long flags;
1169
1170         DEBUG("\n\n\n%s, %p\n", __FUNCTION__, _ep);
1171
1172         req = container_of(_req, struct lh7a40x_request, req);
1173         if (unlikely
1174             (!_req || !_req->complete || !_req->buf
1175              || !list_empty(&req->queue))) {
1176                 DEBUG("%s, bad params\n", __FUNCTION__);
1177                 return -EINVAL;
1178         }
1179
1180         ep = container_of(_ep, struct lh7a40x_ep, ep);
1181         if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1182                 DEBUG("%s, bad ep\n", __FUNCTION__);
1183                 return -EINVAL;
1184         }
1185
1186         dev = ep->dev;
1187         if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1188                 DEBUG("%s, bogus device state %p\n", __FUNCTION__, dev->driver);
1189                 return -ESHUTDOWN;
1190         }
1191
1192         DEBUG("%s queue req %p, len %d buf %p\n", _ep->name, _req, _req->length,
1193               _req->buf);
1194
1195         spin_lock_irqsave(&dev->lock, flags);
1196
1197         _req->status = -EINPROGRESS;
1198         _req->actual = 0;
1199
1200         /* kickstart this i/o queue? */
1201         DEBUG("Add to %d Q %d %d\n", ep_index(ep), list_empty(&ep->queue),
1202               ep->stopped);
1203         if (list_empty(&ep->queue) && likely(!ep->stopped)) {
1204                 u32 csr;
1205
1206                 if (unlikely(ep_index(ep) == 0)) {
1207                         /* EP0 */
1208                         list_add_tail(&req->queue, &ep->queue);
1209                         lh7a40x_ep0_kick(dev, ep);
1210                         req = 0;
1211                 } else if (ep_is_in(ep)) {
1212                         /* EP1 & EP3 */
1213                         usb_set_index(ep_index(ep));
1214                         csr = usb_read(ep->csr1);
1215                         pio_irq_enable(ep_index(ep));
1216                         if ((csr & USB_IN_CSR1_FIFO_NOT_EMPTY) == 0) {
1217                                 if (write_fifo(ep, req) == 1)
1218                                         req = 0;
1219                         }
1220                 } else {
1221                         /* EP2 */
1222                         usb_set_index(ep_index(ep));
1223                         csr = usb_read(ep->csr1);
1224                         pio_irq_enable(ep_index(ep));
1225                         if (!(csr & USB_OUT_CSR1_FIFO_FULL)) {
1226                                 if (read_fifo(ep, req) == 1)
1227                                         req = 0;
1228                         }
1229                 }
1230         }
1231
1232         /* pio or dma irq handler advances the queue. */
1233         if (likely(req != 0))
1234                 list_add_tail(&req->queue, &ep->queue);
1235
1236         spin_unlock_irqrestore(&dev->lock, flags);
1237
1238         return 0;
1239 }
1240
1241 /* dequeue JUST ONE request */
1242 static int lh7a40x_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1243 {
1244         struct lh7a40x_ep *ep;
1245         struct lh7a40x_request *req;
1246         unsigned long flags;
1247
1248         DEBUG("%s, %p\n", __FUNCTION__, _ep);
1249
1250         ep = container_of(_ep, struct lh7a40x_ep, ep);
1251         if (!_ep || ep->ep.name == ep0name)
1252                 return -EINVAL;
1253
1254         spin_lock_irqsave(&ep->dev->lock, flags);
1255
1256         /* make sure it's actually queued on this endpoint */
1257         list_for_each_entry(req, &ep->queue, queue) {
1258                 if (&req->req == _req)
1259                         break;
1260         }
1261         if (&req->req != _req) {
1262                 spin_unlock_irqrestore(&ep->dev->lock, flags);
1263                 return -EINVAL;
1264         }
1265
1266         done(ep, req, -ECONNRESET);
1267
1268         spin_unlock_irqrestore(&ep->dev->lock, flags);
1269         return 0;
1270 }
1271
1272 /** Halt specific EP
1273  *  Return 0 if success
1274  *  NOTE: Sets INDEX register to EP !
1275  */
1276 static int lh7a40x_set_halt(struct usb_ep *_ep, int value)
1277 {
1278         struct lh7a40x_ep *ep;
1279         unsigned long flags;
1280
1281         ep = container_of(_ep, struct lh7a40x_ep, ep);
1282         if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1283                 DEBUG("%s, bad ep\n", __FUNCTION__);
1284                 return -EINVAL;
1285         }
1286
1287         usb_set_index(ep_index(ep));
1288
1289         DEBUG("%s, ep %d, val %d\n", __FUNCTION__, ep_index(ep), value);
1290
1291         spin_lock_irqsave(&ep->dev->lock, flags);
1292
1293         if (ep_index(ep) == 0) {
1294                 /* EP0 */
1295                 usb_set(EP0_SEND_STALL, ep->csr1);
1296         } else if (ep_is_in(ep)) {
1297                 u32 csr = usb_read(ep->csr1);
1298                 if (value && ((csr & USB_IN_CSR1_FIFO_NOT_EMPTY)
1299                               || !list_empty(&ep->queue))) {
1300                         /*
1301                          * Attempts to halt IN endpoints will fail (returning -EAGAIN)
1302                          * if any transfer requests are still queued, or if the controller
1303                          * FIFO still holds bytes that the host hasn\92t collected.
1304                          */
1305                         spin_unlock_irqrestore(&ep->dev->lock, flags);
1306                         DEBUG
1307                             ("Attempt to halt IN endpoint failed (returning -EAGAIN) %d %d\n",
1308                              (csr & USB_IN_CSR1_FIFO_NOT_EMPTY),
1309                              !list_empty(&ep->queue));
1310                         return -EAGAIN;
1311                 }
1312                 flush(ep);
1313                 if (value)
1314                         usb_set(USB_IN_CSR1_SEND_STALL, ep->csr1);
1315                 else {
1316                         usb_clear(USB_IN_CSR1_SEND_STALL, ep->csr1);
1317                         usb_set(USB_IN_CSR1_CLR_DATA_TOGGLE, ep->csr1);
1318                 }
1319
1320         } else {
1321
1322                 flush(ep);
1323                 if (value)
1324                         usb_set(USB_OUT_CSR1_SEND_STALL, ep->csr1);
1325                 else {
1326                         usb_clear(USB_OUT_CSR1_SEND_STALL, ep->csr1);
1327                         usb_set(USB_OUT_CSR1_CLR_DATA_REG, ep->csr1);
1328                 }
1329         }
1330
1331         if (value) {
1332                 ep->stopped = 1;
1333         } else {
1334                 ep->stopped = 0;
1335         }
1336
1337         spin_unlock_irqrestore(&ep->dev->lock, flags);
1338
1339         DEBUG("%s %s halted\n", _ep->name, value == 0 ? "NOT" : "IS");
1340
1341         return 0;
1342 }
1343
1344 /** Return bytes in EP FIFO
1345  *  NOTE: Sets INDEX register to EP
1346  */
1347 static int lh7a40x_fifo_status(struct usb_ep *_ep)
1348 {
1349         u32 csr;
1350         int count = 0;
1351         struct lh7a40x_ep *ep;
1352
1353         ep = container_of(_ep, struct lh7a40x_ep, ep);
1354         if (!_ep) {
1355                 DEBUG("%s, bad ep\n", __FUNCTION__);
1356                 return -ENODEV;
1357         }
1358
1359         DEBUG("%s, %d\n", __FUNCTION__, ep_index(ep));
1360
1361         /* LPD can't report unclaimed bytes from IN fifos */
1362         if (ep_is_in(ep))
1363                 return -EOPNOTSUPP;
1364
1365         usb_set_index(ep_index(ep));
1366
1367         csr = usb_read(ep->csr1);
1368         if (ep->dev->gadget.speed != USB_SPEED_UNKNOWN ||
1369             csr & USB_OUT_CSR1_OUT_PKT_RDY) {
1370                 count = usb_read(USB_OUT_FIFO_WC1);
1371         }
1372
1373         return count;
1374 }
1375
1376 /** Flush EP FIFO
1377  *  NOTE: Sets INDEX register to EP
1378  */
1379 static void lh7a40x_fifo_flush(struct usb_ep *_ep)
1380 {
1381         struct lh7a40x_ep *ep;
1382
1383         ep = container_of(_ep, struct lh7a40x_ep, ep);
1384         if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1385                 DEBUG("%s, bad ep\n", __FUNCTION__);
1386                 return;
1387         }
1388
1389         usb_set_index(ep_index(ep));
1390         flush(ep);
1391 }
1392
1393 /****************************************************************/
1394 /* End Point 0 related functions                                */
1395 /****************************************************************/
1396
1397 /* return:  0 = still running, 1 = completed, negative = errno */
1398 static int write_fifo_ep0(struct lh7a40x_ep *ep, struct lh7a40x_request *req)
1399 {
1400         u32 max;
1401         unsigned count;
1402         int is_last;
1403
1404         max = ep_maxpacket(ep);
1405
1406         DEBUG_EP0("%s\n", __FUNCTION__);
1407
1408         count = write_packet(ep, req, max);
1409
1410         /* last packet is usually short (or a zlp) */
1411         if (unlikely(count != max))
1412                 is_last = 1;
1413         else {
1414                 if (likely(req->req.length != req->req.actual) || req->req.zero)
1415                         is_last = 0;
1416                 else
1417                         is_last = 1;
1418         }
1419
1420         DEBUG_EP0("%s: wrote %s %d bytes%s %d left %p\n", __FUNCTION__,
1421                   ep->ep.name, count,
1422                   is_last ? "/L" : "", req->req.length - req->req.actual, req);
1423
1424         /* requests complete when all IN data is in the FIFO */
1425         if (is_last) {
1426                 done(ep, req, 0);
1427                 return 1;
1428         }
1429
1430         return 0;
1431 }
1432
1433 static __inline__ int lh7a40x_fifo_read(struct lh7a40x_ep *ep,
1434                                         unsigned char *cp, int max)
1435 {
1436         int bytes;
1437         int count = usb_read(USB_OUT_FIFO_WC1);
1438         volatile u32 *fifo = (volatile u32 *)ep->fifo;
1439
1440         if (count > max)
1441                 count = max;
1442         bytes = count;
1443         while (count--)
1444                 *cp++ = *fifo & 0xFF;
1445         return bytes;
1446 }
1447
1448 static __inline__ void lh7a40x_fifo_write(struct lh7a40x_ep *ep,
1449                                           unsigned char *cp, int count)
1450 {
1451         volatile u32 *fifo = (volatile u32 *)ep->fifo;
1452         DEBUG_EP0("fifo_write: %d %d\n", ep_index(ep), count);
1453         while (count--)
1454                 *fifo = *cp++;
1455 }
1456
1457 static int read_fifo_ep0(struct lh7a40x_ep *ep, struct lh7a40x_request *req)
1458 {
1459         u32 csr;
1460         u8 *buf;
1461         unsigned bufferspace, count, is_short;
1462         volatile u32 *fifo = (volatile u32 *)ep->fifo;
1463
1464         DEBUG_EP0("%s\n", __FUNCTION__);
1465
1466         csr = usb_read(USB_EP0_CSR);
1467         if (!(csr & USB_OUT_CSR1_OUT_PKT_RDY))
1468                 return 0;
1469
1470         buf = req->req.buf + req->req.actual;
1471         prefetchw(buf);
1472         bufferspace = req->req.length - req->req.actual;
1473
1474         /* read all bytes from this packet */
1475         if (likely(csr & EP0_OUT_PKT_RDY)) {
1476                 count = usb_read(USB_OUT_FIFO_WC1);
1477                 req->req.actual += min(count, bufferspace);
1478         } else                  /* zlp */
1479                 count = 0;
1480
1481         is_short = (count < ep->ep.maxpacket);
1482         DEBUG_EP0("read %s %02x, %d bytes%s req %p %d/%d\n",
1483                   ep->ep.name, csr, count,
1484                   is_short ? "/S" : "", req, req->req.actual, req->req.length);
1485
1486         while (likely(count-- != 0)) {
1487                 u8 byte = (u8) (*fifo & 0xff);
1488
1489                 if (unlikely(bufferspace == 0)) {
1490                         /* this happens when the driver's buffer
1491                          * is smaller than what the host sent.
1492                          * discard the extra data.
1493                          */
1494                         if (req->req.status != -EOVERFLOW)
1495                                 DEBUG_EP0("%s overflow %d\n", ep->ep.name,
1496                                           count);
1497                         req->req.status = -EOVERFLOW;
1498                 } else {
1499                         *buf++ = byte;
1500                         bufferspace--;
1501                 }
1502         }
1503
1504         /* completion */
1505         if (is_short || req->req.actual == req->req.length) {
1506                 done(ep, req, 0);
1507                 return 1;
1508         }
1509
1510         /* finished that packet.  the next one may be waiting... */
1511         return 0;
1512 }
1513
1514 /**
1515  * udc_set_address - set the USB address for this device
1516  * @address:
1517  *
1518  * Called from control endpoint function after it decodes a set address setup packet.
1519  */
1520 static void udc_set_address(struct lh7a40x_udc *dev, unsigned char address)
1521 {
1522         DEBUG_EP0("%s: %d\n", __FUNCTION__, address);
1523         /* c.f. 15.1.2.2 Table 15-4 address will be used after DATA_END is set */
1524         dev->usb_address = address;
1525         usb_set((address & USB_FA_FUNCTION_ADDR), USB_FA);
1526         usb_set(USB_FA_ADDR_UPDATE | (address & USB_FA_FUNCTION_ADDR), USB_FA);
1527         /* usb_read(USB_FA); */
1528 }
1529
1530 /*
1531  * DATA_STATE_RECV (OUT_PKT_RDY)
1532  *      - if error
1533  *              set EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL bits
1534  *      - else
1535  *              set EP0_CLR_OUT bit
1536                                 if last set EP0_DATA_END bit
1537  */
1538 static void lh7a40x_ep0_out(struct lh7a40x_udc *dev, u32 csr)
1539 {
1540         struct lh7a40x_request *req;
1541         struct lh7a40x_ep *ep = &dev->ep[0];
1542         int ret;
1543
1544         DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
1545
1546         if (list_empty(&ep->queue))
1547                 req = 0;
1548         else
1549                 req = list_entry(ep->queue.next, struct lh7a40x_request, queue);
1550
1551         if (req) {
1552
1553                 if (req->req.length == 0) {
1554                         DEBUG_EP0("ZERO LENGTH OUT!\n");
1555                         usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR);
1556                         dev->ep0state = WAIT_FOR_SETUP;
1557                         return;
1558                 }
1559                 ret = read_fifo_ep0(ep, req);
1560                 if (ret) {
1561                         /* Done! */
1562                         DEBUG_EP0("%s: finished, waiting for status\n",
1563                                   __FUNCTION__);
1564
1565                         usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR);
1566                         dev->ep0state = WAIT_FOR_SETUP;
1567                 } else {
1568                         /* Not done yet.. */
1569                         DEBUG_EP0("%s: not finished\n", __FUNCTION__);
1570                         usb_set(EP0_CLR_OUT, USB_EP0_CSR);
1571                 }
1572         } else {
1573                 DEBUG_EP0("NO REQ??!\n");
1574         }
1575 }
1576
1577 /*
1578  * DATA_STATE_XMIT
1579  */
1580 static int lh7a40x_ep0_in(struct lh7a40x_udc *dev, u32 csr)
1581 {
1582         struct lh7a40x_request *req;
1583         struct lh7a40x_ep *ep = &dev->ep[0];
1584         int ret, need_zlp = 0;
1585
1586         DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
1587
1588         if (list_empty(&ep->queue))
1589                 req = 0;
1590         else
1591                 req = list_entry(ep->queue.next, struct lh7a40x_request, queue);
1592
1593         if (!req) {
1594                 DEBUG_EP0("%s: NULL REQ\n", __FUNCTION__);
1595                 return 0;
1596         }
1597
1598         if (req->req.length == 0) {
1599
1600                 usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1601                 dev->ep0state = WAIT_FOR_SETUP;
1602                 return 1;
1603         }
1604
1605         if (req->req.length - req->req.actual == EP0_PACKETSIZE) {
1606                 /* Next write will end with the packet size, */
1607                 /* so we need Zero-length-packet */
1608                 need_zlp = 1;
1609         }
1610
1611         ret = write_fifo_ep0(ep, req);
1612
1613         if (ret == 1 && !need_zlp) {
1614                 /* Last packet */
1615                 DEBUG_EP0("%s: finished, waiting for status\n", __FUNCTION__);
1616
1617                 usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1618                 dev->ep0state = WAIT_FOR_SETUP;
1619         } else {
1620                 DEBUG_EP0("%s: not finished\n", __FUNCTION__);
1621                 usb_set(EP0_IN_PKT_RDY, USB_EP0_CSR);
1622         }
1623
1624         if (need_zlp) {
1625                 DEBUG_EP0("%s: Need ZLP!\n", __FUNCTION__);
1626                 usb_set(EP0_IN_PKT_RDY, USB_EP0_CSR);
1627                 dev->ep0state = DATA_STATE_NEED_ZLP;
1628         }
1629
1630         return 1;
1631 }
1632
1633 static int lh7a40x_handle_get_status(struct lh7a40x_udc *dev,
1634                                      struct usb_ctrlrequest *ctrl)
1635 {
1636         struct lh7a40x_ep *ep0 = &dev->ep[0];
1637         struct lh7a40x_ep *qep;
1638         int reqtype = (ctrl->bRequestType & USB_RECIP_MASK);
1639         u16 val = 0;
1640
1641         if (reqtype == USB_RECIP_INTERFACE) {
1642                 /* This is not supported.
1643                  * And according to the USB spec, this one does nothing..
1644                  * Just return 0
1645                  */
1646                 DEBUG_SETUP("GET_STATUS: USB_RECIP_INTERFACE\n");
1647         } else if (reqtype == USB_RECIP_DEVICE) {
1648                 DEBUG_SETUP("GET_STATUS: USB_RECIP_DEVICE\n");
1649                 val |= (1 << 0);        /* Self powered */
1650                 /*val |= (1<<1); *//* Remote wakeup */
1651         } else if (reqtype == USB_RECIP_ENDPOINT) {
1652                 int ep_num = (ctrl->wIndex & ~USB_DIR_IN);
1653
1654                 DEBUG_SETUP
1655                     ("GET_STATUS: USB_RECIP_ENDPOINT (%d), ctrl->wLength = %d\n",
1656                      ep_num, ctrl->wLength);
1657
1658                 if (ctrl->wLength > 2 || ep_num > 3)
1659                         return -EOPNOTSUPP;
1660
1661                 qep = &dev->ep[ep_num];
1662                 if (ep_is_in(qep) != ((ctrl->wIndex & USB_DIR_IN) ? 1 : 0)
1663                     && ep_index(qep) != 0) {
1664                         return -EOPNOTSUPP;
1665                 }
1666
1667                 usb_set_index(ep_index(qep));
1668
1669                 /* Return status on next IN token */
1670                 switch (qep->ep_type) {
1671                 case ep_control:
1672                         val =
1673                             (usb_read(qep->csr1) & EP0_SEND_STALL) ==
1674                             EP0_SEND_STALL;
1675                         break;
1676                 case ep_bulk_in:
1677                 case ep_interrupt:
1678                         val =
1679                             (usb_read(qep->csr1) & USB_IN_CSR1_SEND_STALL) ==
1680                             USB_IN_CSR1_SEND_STALL;
1681                         break;
1682                 case ep_bulk_out:
1683                         val =
1684                             (usb_read(qep->csr1) & USB_OUT_CSR1_SEND_STALL) ==
1685                             USB_OUT_CSR1_SEND_STALL;
1686                         break;
1687                 }
1688
1689                 /* Back to EP0 index */
1690                 usb_set_index(0);
1691
1692                 DEBUG_SETUP("GET_STATUS, ep: %d (%x), val = %d\n", ep_num,
1693                             ctrl->wIndex, val);
1694         } else {
1695                 DEBUG_SETUP("Unknown REQ TYPE: %d\n", reqtype);
1696                 return -EOPNOTSUPP;
1697         }
1698
1699         /* Clear "out packet ready" */
1700         usb_set((EP0_CLR_OUT), USB_EP0_CSR);
1701         /* Put status to FIFO */
1702         lh7a40x_fifo_write(ep0, (u8 *) & val, sizeof(val));
1703         /* Issue "In packet ready" */
1704         usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1705
1706         return 0;
1707 }
1708
1709 /*
1710  * WAIT_FOR_SETUP (OUT_PKT_RDY)
1711  *      - read data packet from EP0 FIFO
1712  *      - decode command
1713  *      - if error
1714  *              set EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL bits
1715  *      - else
1716  *              set EP0_CLR_OUT | EP0_DATA_END bits
1717  */
1718 static void lh7a40x_ep0_setup(struct lh7a40x_udc *dev, u32 csr)
1719 {
1720         struct lh7a40x_ep *ep = &dev->ep[0];
1721         struct usb_ctrlrequest ctrl;
1722         int i, bytes, is_in;
1723
1724         DEBUG_SETUP("%s: %x\n", __FUNCTION__, csr);
1725
1726         /* Nuke all previous transfers */
1727         nuke(ep, -EPROTO);
1728
1729         /* read control req from fifo (8 bytes) */
1730         bytes = lh7a40x_fifo_read(ep, (unsigned char *)&ctrl, 8);
1731
1732         DEBUG_SETUP("Read CTRL REQ %d bytes\n", bytes);
1733         DEBUG_SETUP("CTRL.bRequestType = %d (is_in %d)\n", ctrl.bRequestType,
1734                     ctrl.bRequestType == USB_DIR_IN);
1735         DEBUG_SETUP("CTRL.bRequest = %d\n", ctrl.bRequest);
1736         DEBUG_SETUP("CTRL.wLength = %d\n", ctrl.wLength);
1737         DEBUG_SETUP("CTRL.wValue = %d (%d)\n", ctrl.wValue, ctrl.wValue >> 8);
1738         DEBUG_SETUP("CTRL.wIndex = %d\n", ctrl.wIndex);
1739
1740         /* Set direction of EP0 */
1741         if (likely(ctrl.bRequestType & USB_DIR_IN)) {
1742                 ep->bEndpointAddress |= USB_DIR_IN;
1743                 is_in = 1;
1744         } else {
1745                 ep->bEndpointAddress &= ~USB_DIR_IN;
1746                 is_in = 0;
1747         }
1748
1749         dev->req_pending = 1;
1750
1751         /* Handle some SETUP packets ourselves */
1752         switch (ctrl.bRequest) {
1753         case USB_REQ_SET_ADDRESS:
1754                 if (ctrl.bRequestType != (USB_TYPE_STANDARD | USB_RECIP_DEVICE))
1755                         break;
1756
1757                 DEBUG_SETUP("USB_REQ_SET_ADDRESS (%d)\n", ctrl.wValue);
1758                 udc_set_address(dev, ctrl.wValue);
1759                 usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR);
1760                 return;
1761
1762         case USB_REQ_GET_STATUS:{
1763                         if (lh7a40x_handle_get_status(dev, &ctrl) == 0)
1764                                 return;
1765
1766         case USB_REQ_CLEAR_FEATURE:
1767         case USB_REQ_SET_FEATURE:
1768                         if (ctrl.bRequestType == USB_RECIP_ENDPOINT) {
1769                                 struct lh7a40x_ep *qep;
1770                                 int ep_num = (ctrl.wIndex & 0x0f);
1771
1772                                 /* Support only HALT feature */
1773                                 if (ctrl.wValue != 0 || ctrl.wLength != 0
1774                                     || ep_num > 3 || ep_num < 1)
1775                                         break;
1776
1777                                 qep = &dev->ep[ep_num];
1778                                 spin_unlock(&dev->lock);
1779                                 if (ctrl.bRequest == USB_REQ_SET_FEATURE) {
1780                                         DEBUG_SETUP("SET_FEATURE (%d)\n",
1781                                                     ep_num);
1782                                         lh7a40x_set_halt(&qep->ep, 1);
1783                                 } else {
1784                                         DEBUG_SETUP("CLR_FEATURE (%d)\n",
1785                                                     ep_num);
1786                                         lh7a40x_set_halt(&qep->ep, 0);
1787                                 }
1788                                 spin_lock(&dev->lock);
1789                                 usb_set_index(0);
1790
1791                                 /* Reply with a ZLP on next IN token */
1792                                 usb_set((EP0_CLR_OUT | EP0_DATA_END),
1793                                         USB_EP0_CSR);
1794                                 return;
1795                         }
1796                         break;
1797                 }
1798
1799         default:
1800                 break;
1801         }
1802
1803         if (likely(dev->driver)) {
1804                 /* device-2-host (IN) or no data setup command, process immediately */
1805                 spin_unlock(&dev->lock);
1806                 i = dev->driver->setup(&dev->gadget, &ctrl);
1807                 spin_lock(&dev->lock);
1808
1809                 if (i < 0) {
1810                         /* setup processing failed, force stall */
1811                         DEBUG_SETUP
1812                             ("  --> ERROR: gadget setup FAILED (stalling), setup returned %d\n",
1813                              i);
1814                         usb_set_index(0);
1815                         usb_set((EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL),
1816                                 USB_EP0_CSR);
1817
1818                         /* ep->stopped = 1; */
1819                         dev->ep0state = WAIT_FOR_SETUP;
1820                 }
1821         }
1822 }
1823
1824 /*
1825  * DATA_STATE_NEED_ZLP
1826  */
1827 static void lh7a40x_ep0_in_zlp(struct lh7a40x_udc *dev, u32 csr)
1828 {
1829         DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
1830
1831         /* c.f. Table 15-14 */
1832         usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1833         dev->ep0state = WAIT_FOR_SETUP;
1834 }
1835
1836 /*
1837  * handle ep0 interrupt
1838  */
1839 static void lh7a40x_handle_ep0(struct lh7a40x_udc *dev, u32 intr)
1840 {
1841         struct lh7a40x_ep *ep = &dev->ep[0];
1842         u32 csr;
1843
1844         /* Set index 0 */
1845         usb_set_index(0);
1846         csr = usb_read(USB_EP0_CSR);
1847
1848         DEBUG_EP0("%s: csr = %x\n", __FUNCTION__, csr);
1849
1850         /*
1851          * For overview of what we should be doing see c.f. Chapter 18.1.2.4
1852          * We will follow that outline here modified by our own global state
1853          * indication which provides hints as to what we think should be
1854          * happening..
1855          */
1856
1857         /*
1858          * if SENT_STALL is set
1859          *      - clear the SENT_STALL bit
1860          */
1861         if (csr & EP0_SENT_STALL) {
1862                 DEBUG_EP0("%s: EP0_SENT_STALL is set: %x\n", __FUNCTION__, csr);
1863                 usb_clear((EP0_SENT_STALL | EP0_SEND_STALL), USB_EP0_CSR);
1864                 nuke(ep, -ECONNABORTED);
1865                 dev->ep0state = WAIT_FOR_SETUP;
1866                 return;
1867         }
1868
1869         /*
1870          * if a transfer is in progress && IN_PKT_RDY and OUT_PKT_RDY are clear
1871          *      - fill EP0 FIFO
1872          *      - if last packet
1873          *      -       set IN_PKT_RDY | DATA_END
1874          *      - else
1875          *              set IN_PKT_RDY
1876          */
1877         if (!(csr & (EP0_IN_PKT_RDY | EP0_OUT_PKT_RDY))) {
1878                 DEBUG_EP0("%s: IN_PKT_RDY and OUT_PKT_RDY are clear\n",
1879                           __FUNCTION__);
1880
1881                 switch (dev->ep0state) {
1882                 case DATA_STATE_XMIT:
1883                         DEBUG_EP0("continue with DATA_STATE_XMIT\n");
1884                         lh7a40x_ep0_in(dev, csr);
1885                         return;
1886                 case DATA_STATE_NEED_ZLP:
1887                         DEBUG_EP0("continue with DATA_STATE_NEED_ZLP\n");
1888                         lh7a40x_ep0_in_zlp(dev, csr);
1889                         return;
1890                 default:
1891                         /* Stall? */
1892                         DEBUG_EP0("Odd state!! state = %s\n",
1893                                   state_names[dev->ep0state]);
1894                         dev->ep0state = WAIT_FOR_SETUP;
1895                         /* nuke(ep, 0); */
1896                         /* usb_set(EP0_SEND_STALL, ep->csr1); */
1897                         break;
1898                 }
1899         }
1900
1901         /*
1902          * if SETUP_END is set
1903          *      - abort the last transfer
1904          *      - set SERVICED_SETUP_END_BIT
1905          */
1906         if (csr & EP0_SETUP_END) {
1907                 DEBUG_EP0("%s: EP0_SETUP_END is set: %x\n", __FUNCTION__, csr);
1908
1909                 usb_set(EP0_CLR_SETUP_END, USB_EP0_CSR);
1910
1911                 nuke(ep, 0);
1912                 dev->ep0state = WAIT_FOR_SETUP;
1913         }
1914
1915         /*
1916          * if EP0_OUT_PKT_RDY is set
1917          *      - read data packet from EP0 FIFO
1918          *      - decode command
1919          *      - if error
1920          *              set SERVICED_OUT_PKT_RDY | DATA_END bits | SEND_STALL
1921          *      - else
1922          *              set SERVICED_OUT_PKT_RDY | DATA_END bits
1923          */
1924         if (csr & EP0_OUT_PKT_RDY) {
1925
1926                 DEBUG_EP0("%s: EP0_OUT_PKT_RDY is set: %x\n", __FUNCTION__,
1927                           csr);
1928
1929                 switch (dev->ep0state) {
1930                 case WAIT_FOR_SETUP:
1931                         DEBUG_EP0("WAIT_FOR_SETUP\n");
1932                         lh7a40x_ep0_setup(dev, csr);
1933                         break;
1934
1935                 case DATA_STATE_RECV:
1936                         DEBUG_EP0("DATA_STATE_RECV\n");
1937                         lh7a40x_ep0_out(dev, csr);
1938                         break;
1939
1940                 default:
1941                         /* send stall? */
1942                         DEBUG_EP0("strange state!! 2. send stall? state = %d\n",
1943                                   dev->ep0state);
1944                         break;
1945                 }
1946         }
1947 }
1948
1949 static void lh7a40x_ep0_kick(struct lh7a40x_udc *dev, struct lh7a40x_ep *ep)
1950 {
1951         u32 csr;
1952
1953         usb_set_index(0);
1954         csr = usb_read(USB_EP0_CSR);
1955
1956         DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
1957
1958         /* Clear "out packet ready" */
1959         usb_set(EP0_CLR_OUT, USB_EP0_CSR);
1960
1961         if (ep_is_in(ep)) {
1962                 dev->ep0state = DATA_STATE_XMIT;
1963                 lh7a40x_ep0_in(dev, csr);
1964         } else {
1965                 dev->ep0state = DATA_STATE_RECV;
1966                 lh7a40x_ep0_out(dev, csr);
1967         }
1968 }
1969
1970 /* ---------------------------------------------------------------------------
1971  *      device-scoped parts of the api to the usb controller hardware
1972  * ---------------------------------------------------------------------------
1973  */
1974
1975 static int lh7a40x_udc_get_frame(struct usb_gadget *_gadget)
1976 {
1977         u32 frame1 = usb_read(USB_FRM_NUM1);    /* Least significant 8 bits */
1978         u32 frame2 = usb_read(USB_FRM_NUM2);    /* Most significant 3 bits */
1979         DEBUG("%s, %p\n", __FUNCTION__, _gadget);
1980         return ((frame2 & 0x07) << 8) | (frame1 & 0xff);
1981 }
1982
1983 static int lh7a40x_udc_wakeup(struct usb_gadget *_gadget)
1984 {
1985         /* host may not have enabled remote wakeup */
1986         /*if ((UDCCS0 & UDCCS0_DRWF) == 0)
1987            return -EHOSTUNREACH;
1988            udc_set_mask_UDCCR(UDCCR_RSM); */
1989         return -ENOTSUPP;
1990 }
1991
1992 static const struct usb_gadget_ops lh7a40x_udc_ops = {
1993         .get_frame = lh7a40x_udc_get_frame,
1994         .wakeup = lh7a40x_udc_wakeup,
1995         /* current versions must always be self-powered */
1996 };
1997
1998 static void nop_release(struct device *dev)
1999 {
2000         DEBUG("%s %s\n", __FUNCTION__, dev->bus_id);
2001 }
2002
2003 static struct lh7a40x_udc memory = {
2004         .usb_address = 0,
2005
2006         .gadget = {
2007                    .ops = &lh7a40x_udc_ops,
2008                    .ep0 = &memory.ep[0].ep,
2009                    .name = driver_name,
2010                    .dev = {
2011                            .bus_id = "gadget",
2012                            .release = nop_release,
2013                            },
2014                    },
2015
2016         /* control endpoint */
2017         .ep[0] = {
2018                   .ep = {
2019                          .name = ep0name,
2020                          .ops = &lh7a40x_ep_ops,
2021                          .maxpacket = EP0_PACKETSIZE,
2022                          },
2023                   .dev = &memory,
2024
2025                   .bEndpointAddress = 0,
2026                   .bmAttributes = 0,
2027
2028                   .ep_type = ep_control,
2029                   .fifo = io_p2v(USB_EP0_FIFO),
2030                   .csr1 = USB_EP0_CSR,
2031                   .csr2 = USB_EP0_CSR,
2032                   },
2033
2034         /* first group of endpoints */
2035         .ep[1] = {
2036                   .ep = {
2037                          .name = "ep1in-bulk",
2038                          .ops = &lh7a40x_ep_ops,
2039                          .maxpacket = 64,
2040                          },
2041                   .dev = &memory,
2042
2043                   .bEndpointAddress = USB_DIR_IN | 1,
2044                   .bmAttributes = USB_ENDPOINT_XFER_BULK,
2045
2046                   .ep_type = ep_bulk_in,
2047                   .fifo = io_p2v(USB_EP1_FIFO),
2048                   .csr1 = USB_IN_CSR1,
2049                   .csr2 = USB_IN_CSR2,
2050                   },
2051
2052         .ep[2] = {
2053                   .ep = {
2054                          .name = "ep2out-bulk",
2055                          .ops = &lh7a40x_ep_ops,
2056                          .maxpacket = 64,
2057                          },
2058                   .dev = &memory,
2059
2060                   .bEndpointAddress = 2,
2061                   .bmAttributes = USB_ENDPOINT_XFER_BULK,
2062
2063                   .ep_type = ep_bulk_out,
2064                   .fifo = io_p2v(USB_EP2_FIFO),
2065                   .csr1 = USB_OUT_CSR1,
2066                   .csr2 = USB_OUT_CSR2,
2067                   },
2068
2069         .ep[3] = {
2070                   .ep = {
2071                          .name = "ep3in-int",
2072                          .ops = &lh7a40x_ep_ops,
2073                          .maxpacket = 64,
2074                          },
2075                   .dev = &memory,
2076
2077                   .bEndpointAddress = USB_DIR_IN | 3,
2078                   .bmAttributes = USB_ENDPOINT_XFER_INT,
2079
2080                   .ep_type = ep_interrupt,
2081                   .fifo = io_p2v(USB_EP3_FIFO),
2082                   .csr1 = USB_IN_CSR1,
2083                   .csr2 = USB_IN_CSR2,
2084                   },
2085 };
2086
2087 /*
2088  *      probe - binds to the platform device
2089  */
2090 static int lh7a40x_udc_probe(struct platform_device *pdev)
2091 {
2092         struct lh7a40x_udc *dev = &memory;
2093         int retval;
2094
2095         DEBUG("%s: %p\n", __FUNCTION__, pdev);
2096
2097         spin_lock_init(&dev->lock);
2098         dev->dev = &pdev->dev;
2099
2100         device_initialize(&dev->gadget.dev);
2101         dev->gadget.dev.parent = &pdev->dev;
2102
2103         the_controller = dev;
2104         platform_set_drvdata(pdev, dev);
2105
2106         udc_disable(dev);
2107         udc_reinit(dev);
2108
2109         /* irq setup after old hardware state is cleaned up */
2110         retval =
2111             request_irq(IRQ_USBINTR, lh7a40x_udc_irq, SA_INTERRUPT, driver_name,
2112                         dev);
2113         if (retval != 0) {
2114                 DEBUG(KERN_ERR "%s: can't get irq %i, err %d\n", driver_name,
2115                       IRQ_USBINTR, retval);
2116                 return -EBUSY;
2117         }
2118
2119         create_proc_files();
2120
2121         return retval;
2122 }
2123
2124 static int lh7a40x_udc_remove(struct platform_device *pdev)
2125 {
2126         struct lh7a40x_udc *dev = platform_get_drvdata(pdev);
2127
2128         DEBUG("%s: %p\n", __FUNCTION__, pdev);
2129
2130         udc_disable(dev);
2131         remove_proc_files();
2132         usb_gadget_unregister_driver(dev->driver);
2133
2134         free_irq(IRQ_USBINTR, dev);
2135
2136         platform_set_drvdata(pdev, 0);
2137
2138         the_controller = 0;
2139
2140         return 0;
2141 }
2142
2143 /*-------------------------------------------------------------------------*/
2144
2145 static struct platform_driver udc_driver = {
2146         .probe = lh7a40x_udc_probe,
2147         .remove = lh7a40x_udc_remove
2148             /* FIXME power management support */
2149             /* .suspend = ... disable UDC */
2150             /* .resume = ... re-enable UDC */
2151         .driver = {
2152                 .name = (char *)driver_name,
2153                 .owner = THIS_MODULE,
2154         },
2155 };
2156
2157 static int __init udc_init(void)
2158 {
2159         DEBUG("%s: %s version %s\n", __FUNCTION__, driver_name, DRIVER_VERSION);
2160         return platform_driver_register(&udc_driver);
2161 }
2162
2163 static void __exit udc_exit(void)
2164 {
2165         platform_driver_unregister(&udc_driver);
2166 }
2167
2168 module_init(udc_init);
2169 module_exit(udc_exit);
2170
2171 MODULE_DESCRIPTION(DRIVER_DESC);
2172 MODULE_AUTHOR("Mikko Lahteenmaki, Bo Henriksen");
2173 MODULE_LICENSE("GPL");