USB: net2280: update dma buffer allocation
[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 = kzalloc(sizeof(*req), gfp_flags);
1118         if (!req)
1119                 return 0;
1120
1121         INIT_LIST_HEAD(&req->queue);
1122
1123         return &req->req;
1124 }
1125
1126 static void lh7a40x_free_request(struct usb_ep *ep, struct usb_request *_req)
1127 {
1128         struct lh7a40x_request *req;
1129
1130         DEBUG("%s, %p\n", __FUNCTION__, ep);
1131
1132         req = container_of(_req, struct lh7a40x_request, req);
1133         WARN_ON(!list_empty(&req->queue));
1134         kfree(req);
1135 }
1136
1137 static void *lh7a40x_alloc_buffer(struct usb_ep *ep, unsigned bytes,
1138                                   dma_addr_t * dma, gfp_t gfp_flags)
1139 {
1140         char *retval;
1141
1142         DEBUG("%s (%p, %d, %d)\n", __FUNCTION__, ep, bytes, gfp_flags);
1143
1144         retval = kmalloc(bytes, gfp_flags & ~(__GFP_DMA | __GFP_HIGHMEM));
1145         if (retval)
1146                 *dma = virt_to_bus(retval);
1147         return retval;
1148 }
1149
1150 static void lh7a40x_free_buffer(struct usb_ep *ep, void *buf, dma_addr_t dma,
1151                                 unsigned bytes)
1152 {
1153         DEBUG("%s, %p\n", __FUNCTION__, ep);
1154         kfree(buf);
1155 }
1156
1157 /** Queue one request
1158  *  Kickstart transfer if needed
1159  *  NOTE: Sets INDEX register
1160  */
1161 static int lh7a40x_queue(struct usb_ep *_ep, struct usb_request *_req,
1162                          gfp_t gfp_flags)
1163 {
1164         struct lh7a40x_request *req;
1165         struct lh7a40x_ep *ep;
1166         struct lh7a40x_udc *dev;
1167         unsigned long flags;
1168
1169         DEBUG("\n\n\n%s, %p\n", __FUNCTION__, _ep);
1170
1171         req = container_of(_req, struct lh7a40x_request, req);
1172         if (unlikely
1173             (!_req || !_req->complete || !_req->buf
1174              || !list_empty(&req->queue))) {
1175                 DEBUG("%s, bad params\n", __FUNCTION__);
1176                 return -EINVAL;
1177         }
1178
1179         ep = container_of(_ep, struct lh7a40x_ep, ep);
1180         if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1181                 DEBUG("%s, bad ep\n", __FUNCTION__);
1182                 return -EINVAL;
1183         }
1184
1185         dev = ep->dev;
1186         if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1187                 DEBUG("%s, bogus device state %p\n", __FUNCTION__, dev->driver);
1188                 return -ESHUTDOWN;
1189         }
1190
1191         DEBUG("%s queue req %p, len %d buf %p\n", _ep->name, _req, _req->length,
1192               _req->buf);
1193
1194         spin_lock_irqsave(&dev->lock, flags);
1195
1196         _req->status = -EINPROGRESS;
1197         _req->actual = 0;
1198
1199         /* kickstart this i/o queue? */
1200         DEBUG("Add to %d Q %d %d\n", ep_index(ep), list_empty(&ep->queue),
1201               ep->stopped);
1202         if (list_empty(&ep->queue) && likely(!ep->stopped)) {
1203                 u32 csr;
1204
1205                 if (unlikely(ep_index(ep) == 0)) {
1206                         /* EP0 */
1207                         list_add_tail(&req->queue, &ep->queue);
1208                         lh7a40x_ep0_kick(dev, ep);
1209                         req = 0;
1210                 } else if (ep_is_in(ep)) {
1211                         /* EP1 & EP3 */
1212                         usb_set_index(ep_index(ep));
1213                         csr = usb_read(ep->csr1);
1214                         pio_irq_enable(ep_index(ep));
1215                         if ((csr & USB_IN_CSR1_FIFO_NOT_EMPTY) == 0) {
1216                                 if (write_fifo(ep, req) == 1)
1217                                         req = 0;
1218                         }
1219                 } else {
1220                         /* EP2 */
1221                         usb_set_index(ep_index(ep));
1222                         csr = usb_read(ep->csr1);
1223                         pio_irq_enable(ep_index(ep));
1224                         if (!(csr & USB_OUT_CSR1_FIFO_FULL)) {
1225                                 if (read_fifo(ep, req) == 1)
1226                                         req = 0;
1227                         }
1228                 }
1229         }
1230
1231         /* pio or dma irq handler advances the queue. */
1232         if (likely(req != 0))
1233                 list_add_tail(&req->queue, &ep->queue);
1234
1235         spin_unlock_irqrestore(&dev->lock, flags);
1236
1237         return 0;
1238 }
1239
1240 /* dequeue JUST ONE request */
1241 static int lh7a40x_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1242 {
1243         struct lh7a40x_ep *ep;
1244         struct lh7a40x_request *req;
1245         unsigned long flags;
1246
1247         DEBUG("%s, %p\n", __FUNCTION__, _ep);
1248
1249         ep = container_of(_ep, struct lh7a40x_ep, ep);
1250         if (!_ep || ep->ep.name == ep0name)
1251                 return -EINVAL;
1252
1253         spin_lock_irqsave(&ep->dev->lock, flags);
1254
1255         /* make sure it's actually queued on this endpoint */
1256         list_for_each_entry(req, &ep->queue, queue) {
1257                 if (&req->req == _req)
1258                         break;
1259         }
1260         if (&req->req != _req) {
1261                 spin_unlock_irqrestore(&ep->dev->lock, flags);
1262                 return -EINVAL;
1263         }
1264
1265         done(ep, req, -ECONNRESET);
1266
1267         spin_unlock_irqrestore(&ep->dev->lock, flags);
1268         return 0;
1269 }
1270
1271 /** Halt specific EP
1272  *  Return 0 if success
1273  *  NOTE: Sets INDEX register to EP !
1274  */
1275 static int lh7a40x_set_halt(struct usb_ep *_ep, int value)
1276 {
1277         struct lh7a40x_ep *ep;
1278         unsigned long flags;
1279
1280         ep = container_of(_ep, struct lh7a40x_ep, ep);
1281         if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1282                 DEBUG("%s, bad ep\n", __FUNCTION__);
1283                 return -EINVAL;
1284         }
1285
1286         usb_set_index(ep_index(ep));
1287
1288         DEBUG("%s, ep %d, val %d\n", __FUNCTION__, ep_index(ep), value);
1289
1290         spin_lock_irqsave(&ep->dev->lock, flags);
1291
1292         if (ep_index(ep) == 0) {
1293                 /* EP0 */
1294                 usb_set(EP0_SEND_STALL, ep->csr1);
1295         } else if (ep_is_in(ep)) {
1296                 u32 csr = usb_read(ep->csr1);
1297                 if (value && ((csr & USB_IN_CSR1_FIFO_NOT_EMPTY)
1298                               || !list_empty(&ep->queue))) {
1299                         /*
1300                          * Attempts to halt IN endpoints will fail (returning -EAGAIN)
1301                          * if any transfer requests are still queued, or if the controller
1302                          * FIFO still holds bytes that the host hasn\92t collected.
1303                          */
1304                         spin_unlock_irqrestore(&ep->dev->lock, flags);
1305                         DEBUG
1306                             ("Attempt to halt IN endpoint failed (returning -EAGAIN) %d %d\n",
1307                              (csr & USB_IN_CSR1_FIFO_NOT_EMPTY),
1308                              !list_empty(&ep->queue));
1309                         return -EAGAIN;
1310                 }
1311                 flush(ep);
1312                 if (value)
1313                         usb_set(USB_IN_CSR1_SEND_STALL, ep->csr1);
1314                 else {
1315                         usb_clear(USB_IN_CSR1_SEND_STALL, ep->csr1);
1316                         usb_set(USB_IN_CSR1_CLR_DATA_TOGGLE, ep->csr1);
1317                 }
1318
1319         } else {
1320
1321                 flush(ep);
1322                 if (value)
1323                         usb_set(USB_OUT_CSR1_SEND_STALL, ep->csr1);
1324                 else {
1325                         usb_clear(USB_OUT_CSR1_SEND_STALL, ep->csr1);
1326                         usb_set(USB_OUT_CSR1_CLR_DATA_REG, ep->csr1);
1327                 }
1328         }
1329
1330         if (value) {
1331                 ep->stopped = 1;
1332         } else {
1333                 ep->stopped = 0;
1334         }
1335
1336         spin_unlock_irqrestore(&ep->dev->lock, flags);
1337
1338         DEBUG("%s %s halted\n", _ep->name, value == 0 ? "NOT" : "IS");
1339
1340         return 0;
1341 }
1342
1343 /** Return bytes in EP FIFO
1344  *  NOTE: Sets INDEX register to EP
1345  */
1346 static int lh7a40x_fifo_status(struct usb_ep *_ep)
1347 {
1348         u32 csr;
1349         int count = 0;
1350         struct lh7a40x_ep *ep;
1351
1352         ep = container_of(_ep, struct lh7a40x_ep, ep);
1353         if (!_ep) {
1354                 DEBUG("%s, bad ep\n", __FUNCTION__);
1355                 return -ENODEV;
1356         }
1357
1358         DEBUG("%s, %d\n", __FUNCTION__, ep_index(ep));
1359
1360         /* LPD can't report unclaimed bytes from IN fifos */
1361         if (ep_is_in(ep))
1362                 return -EOPNOTSUPP;
1363
1364         usb_set_index(ep_index(ep));
1365
1366         csr = usb_read(ep->csr1);
1367         if (ep->dev->gadget.speed != USB_SPEED_UNKNOWN ||
1368             csr & USB_OUT_CSR1_OUT_PKT_RDY) {
1369                 count = usb_read(USB_OUT_FIFO_WC1);
1370         }
1371
1372         return count;
1373 }
1374
1375 /** Flush EP FIFO
1376  *  NOTE: Sets INDEX register to EP
1377  */
1378 static void lh7a40x_fifo_flush(struct usb_ep *_ep)
1379 {
1380         struct lh7a40x_ep *ep;
1381
1382         ep = container_of(_ep, struct lh7a40x_ep, ep);
1383         if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1384                 DEBUG("%s, bad ep\n", __FUNCTION__);
1385                 return;
1386         }
1387
1388         usb_set_index(ep_index(ep));
1389         flush(ep);
1390 }
1391
1392 /****************************************************************/
1393 /* End Point 0 related functions                                */
1394 /****************************************************************/
1395
1396 /* return:  0 = still running, 1 = completed, negative = errno */
1397 static int write_fifo_ep0(struct lh7a40x_ep *ep, struct lh7a40x_request *req)
1398 {
1399         u32 max;
1400         unsigned count;
1401         int is_last;
1402
1403         max = ep_maxpacket(ep);
1404
1405         DEBUG_EP0("%s\n", __FUNCTION__);
1406
1407         count = write_packet(ep, req, max);
1408
1409         /* last packet is usually short (or a zlp) */
1410         if (unlikely(count != max))
1411                 is_last = 1;
1412         else {
1413                 if (likely(req->req.length != req->req.actual) || req->req.zero)
1414                         is_last = 0;
1415                 else
1416                         is_last = 1;
1417         }
1418
1419         DEBUG_EP0("%s: wrote %s %d bytes%s %d left %p\n", __FUNCTION__,
1420                   ep->ep.name, count,
1421                   is_last ? "/L" : "", req->req.length - req->req.actual, req);
1422
1423         /* requests complete when all IN data is in the FIFO */
1424         if (is_last) {
1425                 done(ep, req, 0);
1426                 return 1;
1427         }
1428
1429         return 0;
1430 }
1431
1432 static __inline__ int lh7a40x_fifo_read(struct lh7a40x_ep *ep,
1433                                         unsigned char *cp, int max)
1434 {
1435         int bytes;
1436         int count = usb_read(USB_OUT_FIFO_WC1);
1437         volatile u32 *fifo = (volatile u32 *)ep->fifo;
1438
1439         if (count > max)
1440                 count = max;
1441         bytes = count;
1442         while (count--)
1443                 *cp++ = *fifo & 0xFF;
1444         return bytes;
1445 }
1446
1447 static __inline__ void lh7a40x_fifo_write(struct lh7a40x_ep *ep,
1448                                           unsigned char *cp, int count)
1449 {
1450         volatile u32 *fifo = (volatile u32 *)ep->fifo;
1451         DEBUG_EP0("fifo_write: %d %d\n", ep_index(ep), count);
1452         while (count--)
1453                 *fifo = *cp++;
1454 }
1455
1456 static int read_fifo_ep0(struct lh7a40x_ep *ep, struct lh7a40x_request *req)
1457 {
1458         u32 csr;
1459         u8 *buf;
1460         unsigned bufferspace, count, is_short;
1461         volatile u32 *fifo = (volatile u32 *)ep->fifo;
1462
1463         DEBUG_EP0("%s\n", __FUNCTION__);
1464
1465         csr = usb_read(USB_EP0_CSR);
1466         if (!(csr & USB_OUT_CSR1_OUT_PKT_RDY))
1467                 return 0;
1468
1469         buf = req->req.buf + req->req.actual;
1470         prefetchw(buf);
1471         bufferspace = req->req.length - req->req.actual;
1472
1473         /* read all bytes from this packet */
1474         if (likely(csr & EP0_OUT_PKT_RDY)) {
1475                 count = usb_read(USB_OUT_FIFO_WC1);
1476                 req->req.actual += min(count, bufferspace);
1477         } else                  /* zlp */
1478                 count = 0;
1479
1480         is_short = (count < ep->ep.maxpacket);
1481         DEBUG_EP0("read %s %02x, %d bytes%s req %p %d/%d\n",
1482                   ep->ep.name, csr, count,
1483                   is_short ? "/S" : "", req, req->req.actual, req->req.length);
1484
1485         while (likely(count-- != 0)) {
1486                 u8 byte = (u8) (*fifo & 0xff);
1487
1488                 if (unlikely(bufferspace == 0)) {
1489                         /* this happens when the driver's buffer
1490                          * is smaller than what the host sent.
1491                          * discard the extra data.
1492                          */
1493                         if (req->req.status != -EOVERFLOW)
1494                                 DEBUG_EP0("%s overflow %d\n", ep->ep.name,
1495                                           count);
1496                         req->req.status = -EOVERFLOW;
1497                 } else {
1498                         *buf++ = byte;
1499                         bufferspace--;
1500                 }
1501         }
1502
1503         /* completion */
1504         if (is_short || req->req.actual == req->req.length) {
1505                 done(ep, req, 0);
1506                 return 1;
1507         }
1508
1509         /* finished that packet.  the next one may be waiting... */
1510         return 0;
1511 }
1512
1513 /**
1514  * udc_set_address - set the USB address for this device
1515  * @address:
1516  *
1517  * Called from control endpoint function after it decodes a set address setup packet.
1518  */
1519 static void udc_set_address(struct lh7a40x_udc *dev, unsigned char address)
1520 {
1521         DEBUG_EP0("%s: %d\n", __FUNCTION__, address);
1522         /* c.f. 15.1.2.2 Table 15-4 address will be used after DATA_END is set */
1523         dev->usb_address = address;
1524         usb_set((address & USB_FA_FUNCTION_ADDR), USB_FA);
1525         usb_set(USB_FA_ADDR_UPDATE | (address & USB_FA_FUNCTION_ADDR), USB_FA);
1526         /* usb_read(USB_FA); */
1527 }
1528
1529 /*
1530  * DATA_STATE_RECV (OUT_PKT_RDY)
1531  *      - if error
1532  *              set EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL bits
1533  *      - else
1534  *              set EP0_CLR_OUT bit
1535                                 if last set EP0_DATA_END bit
1536  */
1537 static void lh7a40x_ep0_out(struct lh7a40x_udc *dev, u32 csr)
1538 {
1539         struct lh7a40x_request *req;
1540         struct lh7a40x_ep *ep = &dev->ep[0];
1541         int ret;
1542
1543         DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
1544
1545         if (list_empty(&ep->queue))
1546                 req = 0;
1547         else
1548                 req = list_entry(ep->queue.next, struct lh7a40x_request, queue);
1549
1550         if (req) {
1551
1552                 if (req->req.length == 0) {
1553                         DEBUG_EP0("ZERO LENGTH OUT!\n");
1554                         usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR);
1555                         dev->ep0state = WAIT_FOR_SETUP;
1556                         return;
1557                 }
1558                 ret = read_fifo_ep0(ep, req);
1559                 if (ret) {
1560                         /* Done! */
1561                         DEBUG_EP0("%s: finished, waiting for status\n",
1562                                   __FUNCTION__);
1563
1564                         usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR);
1565                         dev->ep0state = WAIT_FOR_SETUP;
1566                 } else {
1567                         /* Not done yet.. */
1568                         DEBUG_EP0("%s: not finished\n", __FUNCTION__);
1569                         usb_set(EP0_CLR_OUT, USB_EP0_CSR);
1570                 }
1571         } else {
1572                 DEBUG_EP0("NO REQ??!\n");
1573         }
1574 }
1575
1576 /*
1577  * DATA_STATE_XMIT
1578  */
1579 static int lh7a40x_ep0_in(struct lh7a40x_udc *dev, u32 csr)
1580 {
1581         struct lh7a40x_request *req;
1582         struct lh7a40x_ep *ep = &dev->ep[0];
1583         int ret, need_zlp = 0;
1584
1585         DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
1586
1587         if (list_empty(&ep->queue))
1588                 req = 0;
1589         else
1590                 req = list_entry(ep->queue.next, struct lh7a40x_request, queue);
1591
1592         if (!req) {
1593                 DEBUG_EP0("%s: NULL REQ\n", __FUNCTION__);
1594                 return 0;
1595         }
1596
1597         if (req->req.length == 0) {
1598
1599                 usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1600                 dev->ep0state = WAIT_FOR_SETUP;
1601                 return 1;
1602         }
1603
1604         if (req->req.length - req->req.actual == EP0_PACKETSIZE) {
1605                 /* Next write will end with the packet size, */
1606                 /* so we need Zero-length-packet */
1607                 need_zlp = 1;
1608         }
1609
1610         ret = write_fifo_ep0(ep, req);
1611
1612         if (ret == 1 && !need_zlp) {
1613                 /* Last packet */
1614                 DEBUG_EP0("%s: finished, waiting for status\n", __FUNCTION__);
1615
1616                 usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1617                 dev->ep0state = WAIT_FOR_SETUP;
1618         } else {
1619                 DEBUG_EP0("%s: not finished\n", __FUNCTION__);
1620                 usb_set(EP0_IN_PKT_RDY, USB_EP0_CSR);
1621         }
1622
1623         if (need_zlp) {
1624                 DEBUG_EP0("%s: Need ZLP!\n", __FUNCTION__);
1625                 usb_set(EP0_IN_PKT_RDY, USB_EP0_CSR);
1626                 dev->ep0state = DATA_STATE_NEED_ZLP;
1627         }
1628
1629         return 1;
1630 }
1631
1632 static int lh7a40x_handle_get_status(struct lh7a40x_udc *dev,
1633                                      struct usb_ctrlrequest *ctrl)
1634 {
1635         struct lh7a40x_ep *ep0 = &dev->ep[0];
1636         struct lh7a40x_ep *qep;
1637         int reqtype = (ctrl->bRequestType & USB_RECIP_MASK);
1638         u16 val = 0;
1639
1640         if (reqtype == USB_RECIP_INTERFACE) {
1641                 /* This is not supported.
1642                  * And according to the USB spec, this one does nothing..
1643                  * Just return 0
1644                  */
1645                 DEBUG_SETUP("GET_STATUS: USB_RECIP_INTERFACE\n");
1646         } else if (reqtype == USB_RECIP_DEVICE) {
1647                 DEBUG_SETUP("GET_STATUS: USB_RECIP_DEVICE\n");
1648                 val |= (1 << 0);        /* Self powered */
1649                 /*val |= (1<<1); *//* Remote wakeup */
1650         } else if (reqtype == USB_RECIP_ENDPOINT) {
1651                 int ep_num = (ctrl->wIndex & ~USB_DIR_IN);
1652
1653                 DEBUG_SETUP
1654                     ("GET_STATUS: USB_RECIP_ENDPOINT (%d), ctrl->wLength = %d\n",
1655                      ep_num, ctrl->wLength);
1656
1657                 if (ctrl->wLength > 2 || ep_num > 3)
1658                         return -EOPNOTSUPP;
1659
1660                 qep = &dev->ep[ep_num];
1661                 if (ep_is_in(qep) != ((ctrl->wIndex & USB_DIR_IN) ? 1 : 0)
1662                     && ep_index(qep) != 0) {
1663                         return -EOPNOTSUPP;
1664                 }
1665
1666                 usb_set_index(ep_index(qep));
1667
1668                 /* Return status on next IN token */
1669                 switch (qep->ep_type) {
1670                 case ep_control:
1671                         val =
1672                             (usb_read(qep->csr1) & EP0_SEND_STALL) ==
1673                             EP0_SEND_STALL;
1674                         break;
1675                 case ep_bulk_in:
1676                 case ep_interrupt:
1677                         val =
1678                             (usb_read(qep->csr1) & USB_IN_CSR1_SEND_STALL) ==
1679                             USB_IN_CSR1_SEND_STALL;
1680                         break;
1681                 case ep_bulk_out:
1682                         val =
1683                             (usb_read(qep->csr1) & USB_OUT_CSR1_SEND_STALL) ==
1684                             USB_OUT_CSR1_SEND_STALL;
1685                         break;
1686                 }
1687
1688                 /* Back to EP0 index */
1689                 usb_set_index(0);
1690
1691                 DEBUG_SETUP("GET_STATUS, ep: %d (%x), val = %d\n", ep_num,
1692                             ctrl->wIndex, val);
1693         } else {
1694                 DEBUG_SETUP("Unknown REQ TYPE: %d\n", reqtype);
1695                 return -EOPNOTSUPP;
1696         }
1697
1698         /* Clear "out packet ready" */
1699         usb_set((EP0_CLR_OUT), USB_EP0_CSR);
1700         /* Put status to FIFO */
1701         lh7a40x_fifo_write(ep0, (u8 *) & val, sizeof(val));
1702         /* Issue "In packet ready" */
1703         usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1704
1705         return 0;
1706 }
1707
1708 /*
1709  * WAIT_FOR_SETUP (OUT_PKT_RDY)
1710  *      - read data packet from EP0 FIFO
1711  *      - decode command
1712  *      - if error
1713  *              set EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL bits
1714  *      - else
1715  *              set EP0_CLR_OUT | EP0_DATA_END bits
1716  */
1717 static void lh7a40x_ep0_setup(struct lh7a40x_udc *dev, u32 csr)
1718 {
1719         struct lh7a40x_ep *ep = &dev->ep[0];
1720         struct usb_ctrlrequest ctrl;
1721         int i, bytes, is_in;
1722
1723         DEBUG_SETUP("%s: %x\n", __FUNCTION__, csr);
1724
1725         /* Nuke all previous transfers */
1726         nuke(ep, -EPROTO);
1727
1728         /* read control req from fifo (8 bytes) */
1729         bytes = lh7a40x_fifo_read(ep, (unsigned char *)&ctrl, 8);
1730
1731         DEBUG_SETUP("Read CTRL REQ %d bytes\n", bytes);
1732         DEBUG_SETUP("CTRL.bRequestType = %d (is_in %d)\n", ctrl.bRequestType,
1733                     ctrl.bRequestType == USB_DIR_IN);
1734         DEBUG_SETUP("CTRL.bRequest = %d\n", ctrl.bRequest);
1735         DEBUG_SETUP("CTRL.wLength = %d\n", ctrl.wLength);
1736         DEBUG_SETUP("CTRL.wValue = %d (%d)\n", ctrl.wValue, ctrl.wValue >> 8);
1737         DEBUG_SETUP("CTRL.wIndex = %d\n", ctrl.wIndex);
1738
1739         /* Set direction of EP0 */
1740         if (likely(ctrl.bRequestType & USB_DIR_IN)) {
1741                 ep->bEndpointAddress |= USB_DIR_IN;
1742                 is_in = 1;
1743         } else {
1744                 ep->bEndpointAddress &= ~USB_DIR_IN;
1745                 is_in = 0;
1746         }
1747
1748         dev->req_pending = 1;
1749
1750         /* Handle some SETUP packets ourselves */
1751         switch (ctrl.bRequest) {
1752         case USB_REQ_SET_ADDRESS:
1753                 if (ctrl.bRequestType != (USB_TYPE_STANDARD | USB_RECIP_DEVICE))
1754                         break;
1755
1756                 DEBUG_SETUP("USB_REQ_SET_ADDRESS (%d)\n", ctrl.wValue);
1757                 udc_set_address(dev, ctrl.wValue);
1758                 usb_set((EP0_CLR_OUT | EP0_DATA_END), USB_EP0_CSR);
1759                 return;
1760
1761         case USB_REQ_GET_STATUS:{
1762                         if (lh7a40x_handle_get_status(dev, &ctrl) == 0)
1763                                 return;
1764
1765         case USB_REQ_CLEAR_FEATURE:
1766         case USB_REQ_SET_FEATURE:
1767                         if (ctrl.bRequestType == USB_RECIP_ENDPOINT) {
1768                                 struct lh7a40x_ep *qep;
1769                                 int ep_num = (ctrl.wIndex & 0x0f);
1770
1771                                 /* Support only HALT feature */
1772                                 if (ctrl.wValue != 0 || ctrl.wLength != 0
1773                                     || ep_num > 3 || ep_num < 1)
1774                                         break;
1775
1776                                 qep = &dev->ep[ep_num];
1777                                 spin_unlock(&dev->lock);
1778                                 if (ctrl.bRequest == USB_REQ_SET_FEATURE) {
1779                                         DEBUG_SETUP("SET_FEATURE (%d)\n",
1780                                                     ep_num);
1781                                         lh7a40x_set_halt(&qep->ep, 1);
1782                                 } else {
1783                                         DEBUG_SETUP("CLR_FEATURE (%d)\n",
1784                                                     ep_num);
1785                                         lh7a40x_set_halt(&qep->ep, 0);
1786                                 }
1787                                 spin_lock(&dev->lock);
1788                                 usb_set_index(0);
1789
1790                                 /* Reply with a ZLP on next IN token */
1791                                 usb_set((EP0_CLR_OUT | EP0_DATA_END),
1792                                         USB_EP0_CSR);
1793                                 return;
1794                         }
1795                         break;
1796                 }
1797
1798         default:
1799                 break;
1800         }
1801
1802         if (likely(dev->driver)) {
1803                 /* device-2-host (IN) or no data setup command, process immediately */
1804                 spin_unlock(&dev->lock);
1805                 i = dev->driver->setup(&dev->gadget, &ctrl);
1806                 spin_lock(&dev->lock);
1807
1808                 if (i < 0) {
1809                         /* setup processing failed, force stall */
1810                         DEBUG_SETUP
1811                             ("  --> ERROR: gadget setup FAILED (stalling), setup returned %d\n",
1812                              i);
1813                         usb_set_index(0);
1814                         usb_set((EP0_CLR_OUT | EP0_DATA_END | EP0_SEND_STALL),
1815                                 USB_EP0_CSR);
1816
1817                         /* ep->stopped = 1; */
1818                         dev->ep0state = WAIT_FOR_SETUP;
1819                 }
1820         }
1821 }
1822
1823 /*
1824  * DATA_STATE_NEED_ZLP
1825  */
1826 static void lh7a40x_ep0_in_zlp(struct lh7a40x_udc *dev, u32 csr)
1827 {
1828         DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
1829
1830         /* c.f. Table 15-14 */
1831         usb_set((EP0_IN_PKT_RDY | EP0_DATA_END), USB_EP0_CSR);
1832         dev->ep0state = WAIT_FOR_SETUP;
1833 }
1834
1835 /*
1836  * handle ep0 interrupt
1837  */
1838 static void lh7a40x_handle_ep0(struct lh7a40x_udc *dev, u32 intr)
1839 {
1840         struct lh7a40x_ep *ep = &dev->ep[0];
1841         u32 csr;
1842
1843         /* Set index 0 */
1844         usb_set_index(0);
1845         csr = usb_read(USB_EP0_CSR);
1846
1847         DEBUG_EP0("%s: csr = %x\n", __FUNCTION__, csr);
1848
1849         /*
1850          * For overview of what we should be doing see c.f. Chapter 18.1.2.4
1851          * We will follow that outline here modified by our own global state
1852          * indication which provides hints as to what we think should be
1853          * happening..
1854          */
1855
1856         /*
1857          * if SENT_STALL is set
1858          *      - clear the SENT_STALL bit
1859          */
1860         if (csr & EP0_SENT_STALL) {
1861                 DEBUG_EP0("%s: EP0_SENT_STALL is set: %x\n", __FUNCTION__, csr);
1862                 usb_clear((EP0_SENT_STALL | EP0_SEND_STALL), USB_EP0_CSR);
1863                 nuke(ep, -ECONNABORTED);
1864                 dev->ep0state = WAIT_FOR_SETUP;
1865                 return;
1866         }
1867
1868         /*
1869          * if a transfer is in progress && IN_PKT_RDY and OUT_PKT_RDY are clear
1870          *      - fill EP0 FIFO
1871          *      - if last packet
1872          *      -       set IN_PKT_RDY | DATA_END
1873          *      - else
1874          *              set IN_PKT_RDY
1875          */
1876         if (!(csr & (EP0_IN_PKT_RDY | EP0_OUT_PKT_RDY))) {
1877                 DEBUG_EP0("%s: IN_PKT_RDY and OUT_PKT_RDY are clear\n",
1878                           __FUNCTION__);
1879
1880                 switch (dev->ep0state) {
1881                 case DATA_STATE_XMIT:
1882                         DEBUG_EP0("continue with DATA_STATE_XMIT\n");
1883                         lh7a40x_ep0_in(dev, csr);
1884                         return;
1885                 case DATA_STATE_NEED_ZLP:
1886                         DEBUG_EP0("continue with DATA_STATE_NEED_ZLP\n");
1887                         lh7a40x_ep0_in_zlp(dev, csr);
1888                         return;
1889                 default:
1890                         /* Stall? */
1891                         DEBUG_EP0("Odd state!! state = %s\n",
1892                                   state_names[dev->ep0state]);
1893                         dev->ep0state = WAIT_FOR_SETUP;
1894                         /* nuke(ep, 0); */
1895                         /* usb_set(EP0_SEND_STALL, ep->csr1); */
1896                         break;
1897                 }
1898         }
1899
1900         /*
1901          * if SETUP_END is set
1902          *      - abort the last transfer
1903          *      - set SERVICED_SETUP_END_BIT
1904          */
1905         if (csr & EP0_SETUP_END) {
1906                 DEBUG_EP0("%s: EP0_SETUP_END is set: %x\n", __FUNCTION__, csr);
1907
1908                 usb_set(EP0_CLR_SETUP_END, USB_EP0_CSR);
1909
1910                 nuke(ep, 0);
1911                 dev->ep0state = WAIT_FOR_SETUP;
1912         }
1913
1914         /*
1915          * if EP0_OUT_PKT_RDY is set
1916          *      - read data packet from EP0 FIFO
1917          *      - decode command
1918          *      - if error
1919          *              set SERVICED_OUT_PKT_RDY | DATA_END bits | SEND_STALL
1920          *      - else
1921          *              set SERVICED_OUT_PKT_RDY | DATA_END bits
1922          */
1923         if (csr & EP0_OUT_PKT_RDY) {
1924
1925                 DEBUG_EP0("%s: EP0_OUT_PKT_RDY is set: %x\n", __FUNCTION__,
1926                           csr);
1927
1928                 switch (dev->ep0state) {
1929                 case WAIT_FOR_SETUP:
1930                         DEBUG_EP0("WAIT_FOR_SETUP\n");
1931                         lh7a40x_ep0_setup(dev, csr);
1932                         break;
1933
1934                 case DATA_STATE_RECV:
1935                         DEBUG_EP0("DATA_STATE_RECV\n");
1936                         lh7a40x_ep0_out(dev, csr);
1937                         break;
1938
1939                 default:
1940                         /* send stall? */
1941                         DEBUG_EP0("strange state!! 2. send stall? state = %d\n",
1942                                   dev->ep0state);
1943                         break;
1944                 }
1945         }
1946 }
1947
1948 static void lh7a40x_ep0_kick(struct lh7a40x_udc *dev, struct lh7a40x_ep *ep)
1949 {
1950         u32 csr;
1951
1952         usb_set_index(0);
1953         csr = usb_read(USB_EP0_CSR);
1954
1955         DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
1956
1957         /* Clear "out packet ready" */
1958         usb_set(EP0_CLR_OUT, USB_EP0_CSR);
1959
1960         if (ep_is_in(ep)) {
1961                 dev->ep0state = DATA_STATE_XMIT;
1962                 lh7a40x_ep0_in(dev, csr);
1963         } else {
1964                 dev->ep0state = DATA_STATE_RECV;
1965                 lh7a40x_ep0_out(dev, csr);
1966         }
1967 }
1968
1969 /* ---------------------------------------------------------------------------
1970  *      device-scoped parts of the api to the usb controller hardware
1971  * ---------------------------------------------------------------------------
1972  */
1973
1974 static int lh7a40x_udc_get_frame(struct usb_gadget *_gadget)
1975 {
1976         u32 frame1 = usb_read(USB_FRM_NUM1);    /* Least significant 8 bits */
1977         u32 frame2 = usb_read(USB_FRM_NUM2);    /* Most significant 3 bits */
1978         DEBUG("%s, %p\n", __FUNCTION__, _gadget);
1979         return ((frame2 & 0x07) << 8) | (frame1 & 0xff);
1980 }
1981
1982 static int lh7a40x_udc_wakeup(struct usb_gadget *_gadget)
1983 {
1984         /* host may not have enabled remote wakeup */
1985         /*if ((UDCCS0 & UDCCS0_DRWF) == 0)
1986            return -EHOSTUNREACH;
1987            udc_set_mask_UDCCR(UDCCR_RSM); */
1988         return -ENOTSUPP;
1989 }
1990
1991 static const struct usb_gadget_ops lh7a40x_udc_ops = {
1992         .get_frame = lh7a40x_udc_get_frame,
1993         .wakeup = lh7a40x_udc_wakeup,
1994         /* current versions must always be self-powered */
1995 };
1996
1997 static void nop_release(struct device *dev)
1998 {
1999         DEBUG("%s %s\n", __FUNCTION__, dev->bus_id);
2000 }
2001
2002 static struct lh7a40x_udc memory = {
2003         .usb_address = 0,
2004
2005         .gadget = {
2006                    .ops = &lh7a40x_udc_ops,
2007                    .ep0 = &memory.ep[0].ep,
2008                    .name = driver_name,
2009                    .dev = {
2010                            .bus_id = "gadget",
2011                            .release = nop_release,
2012                            },
2013                    },
2014
2015         /* control endpoint */
2016         .ep[0] = {
2017                   .ep = {
2018                          .name = ep0name,
2019                          .ops = &lh7a40x_ep_ops,
2020                          .maxpacket = EP0_PACKETSIZE,
2021                          },
2022                   .dev = &memory,
2023
2024                   .bEndpointAddress = 0,
2025                   .bmAttributes = 0,
2026
2027                   .ep_type = ep_control,
2028                   .fifo = io_p2v(USB_EP0_FIFO),
2029                   .csr1 = USB_EP0_CSR,
2030                   .csr2 = USB_EP0_CSR,
2031                   },
2032
2033         /* first group of endpoints */
2034         .ep[1] = {
2035                   .ep = {
2036                          .name = "ep1in-bulk",
2037                          .ops = &lh7a40x_ep_ops,
2038                          .maxpacket = 64,
2039                          },
2040                   .dev = &memory,
2041
2042                   .bEndpointAddress = USB_DIR_IN | 1,
2043                   .bmAttributes = USB_ENDPOINT_XFER_BULK,
2044
2045                   .ep_type = ep_bulk_in,
2046                   .fifo = io_p2v(USB_EP1_FIFO),
2047                   .csr1 = USB_IN_CSR1,
2048                   .csr2 = USB_IN_CSR2,
2049                   },
2050
2051         .ep[2] = {
2052                   .ep = {
2053                          .name = "ep2out-bulk",
2054                          .ops = &lh7a40x_ep_ops,
2055                          .maxpacket = 64,
2056                          },
2057                   .dev = &memory,
2058
2059                   .bEndpointAddress = 2,
2060                   .bmAttributes = USB_ENDPOINT_XFER_BULK,
2061
2062                   .ep_type = ep_bulk_out,
2063                   .fifo = io_p2v(USB_EP2_FIFO),
2064                   .csr1 = USB_OUT_CSR1,
2065                   .csr2 = USB_OUT_CSR2,
2066                   },
2067
2068         .ep[3] = {
2069                   .ep = {
2070                          .name = "ep3in-int",
2071                          .ops = &lh7a40x_ep_ops,
2072                          .maxpacket = 64,
2073                          },
2074                   .dev = &memory,
2075
2076                   .bEndpointAddress = USB_DIR_IN | 3,
2077                   .bmAttributes = USB_ENDPOINT_XFER_INT,
2078
2079                   .ep_type = ep_interrupt,
2080                   .fifo = io_p2v(USB_EP3_FIFO),
2081                   .csr1 = USB_IN_CSR1,
2082                   .csr2 = USB_IN_CSR2,
2083                   },
2084 };
2085
2086 /*
2087  *      probe - binds to the platform device
2088  */
2089 static int lh7a40x_udc_probe(struct platform_device *pdev)
2090 {
2091         struct lh7a40x_udc *dev = &memory;
2092         int retval;
2093
2094         DEBUG("%s: %p\n", __FUNCTION__, pdev);
2095
2096         spin_lock_init(&dev->lock);
2097         dev->dev = &pdev->dev;
2098
2099         device_initialize(&dev->gadget.dev);
2100         dev->gadget.dev.parent = &pdev->dev;
2101
2102         the_controller = dev;
2103         platform_set_drvdata(pdev, dev);
2104
2105         udc_disable(dev);
2106         udc_reinit(dev);
2107
2108         /* irq setup after old hardware state is cleaned up */
2109         retval =
2110             request_irq(IRQ_USBINTR, lh7a40x_udc_irq, IRQF_DISABLED, driver_name,
2111                         dev);
2112         if (retval != 0) {
2113                 DEBUG(KERN_ERR "%s: can't get irq %i, err %d\n", driver_name,
2114                       IRQ_USBINTR, retval);
2115                 return -EBUSY;
2116         }
2117
2118         create_proc_files();
2119
2120         return retval;
2121 }
2122
2123 static int lh7a40x_udc_remove(struct platform_device *pdev)
2124 {
2125         struct lh7a40x_udc *dev = platform_get_drvdata(pdev);
2126
2127         DEBUG("%s: %p\n", __FUNCTION__, pdev);
2128
2129         udc_disable(dev);
2130         remove_proc_files();
2131         usb_gadget_unregister_driver(dev->driver);
2132
2133         free_irq(IRQ_USBINTR, dev);
2134
2135         platform_set_drvdata(pdev, 0);
2136
2137         the_controller = 0;
2138
2139         return 0;
2140 }
2141
2142 /*-------------------------------------------------------------------------*/
2143
2144 static struct platform_driver udc_driver = {
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         .driver = {
2151                 .name = (char *)driver_name,
2152                 .owner = THIS_MODULE,
2153         },
2154 };
2155
2156 static int __init udc_init(void)
2157 {
2158         DEBUG("%s: %s version %s\n", __FUNCTION__, driver_name, DRIVER_VERSION);
2159         return platform_driver_register(&udc_driver);
2160 }
2161
2162 static void __exit udc_exit(void)
2163 {
2164         platform_driver_unregister(&udc_driver);
2165 }
2166
2167 module_init(udc_init);
2168 module_exit(udc_exit);
2169
2170 MODULE_DESCRIPTION(DRIVER_DESC);
2171 MODULE_AUTHOR("Mikko Lahteenmaki, Bo Henriksen");
2172 MODULE_LICENSE("GPL");