Merge master.kernel.org:/home/rmk/linux-2.6-mmc
[linux-2.6] / drivers / usb / gadget / goku_udc.c
1 /*
2  * Toshiba TC86C001 ("Goku-S") USB Device Controller driver
3  *
4  * Copyright (C) 2000-2002 Lineo
5  *      by Stuart Lynne, Tom Rushworth, and Bruce Balden
6  * Copyright (C) 2002 Toshiba Corporation
7  * Copyright (C) 2003 MontaVista Software (source@mvista.com)
8  *
9  * This file is licensed under the terms of the GNU General Public
10  * License version 2.  This program is licensed "as is" without any
11  * warranty of any kind, whether express or implied.
12  */
13
14 /*
15  * This device has ep0 and three semi-configurable bulk/interrupt endpoints.
16  *
17  *  - Endpoint numbering is fixed: ep{1,2,3}-bulk
18  *  - Gadget drivers can choose ep maxpacket (8/16/32/64)
19  *  - Gadget drivers can choose direction (IN, OUT)
20  *  - DMA works with ep1 (OUT transfers) and ep2 (IN transfers).
21  */
22
23 #undef DEBUG
24 // #define      VERBOSE         /* extra debug messages (success too) */
25 // #define      USB_TRACE       /* packet-level success messages */
26
27 #include <linux/config.h>
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/delay.h>
32 #include <linux/ioport.h>
33 #include <linux/sched.h>
34 #include <linux/slab.h>
35 #include <linux/smp_lock.h>
36 #include <linux/errno.h>
37 #include <linux/init.h>
38 #include <linux/timer.h>
39 #include <linux/list.h>
40 #include <linux/interrupt.h>
41 #include <linux/proc_fs.h>
42 #include <linux/device.h>
43 #include <linux/usb_ch9.h>
44 #include <linux/usb_gadget.h>
45
46 #include <asm/byteorder.h>
47 #include <asm/io.h>
48 #include <asm/irq.h>
49 #include <asm/system.h>
50 #include <asm/unaligned.h>
51
52
53 #include "goku_udc.h"
54
55 #define DRIVER_DESC             "TC86C001 USB Device Controller"
56 #define DRIVER_VERSION          "30-Oct 2003"
57
58 #define DMA_ADDR_INVALID        (~(dma_addr_t)0)
59
60 static const char driver_name [] = "goku_udc";
61 static const char driver_desc [] = DRIVER_DESC;
62
63 MODULE_AUTHOR("source@mvista.com");
64 MODULE_DESCRIPTION(DRIVER_DESC);
65 MODULE_LICENSE("GPL");
66
67
68 /*
69  * IN dma behaves ok under testing, though the IN-dma abort paths don't
70  * seem to behave quite as expected.  Used by default.
71  *
72  * OUT dma documents design problems handling the common "short packet"
73  * transfer termination policy; it couldn't be enabled by default, even
74  * if the OUT-dma abort problems had a resolution.
75  */
76 static unsigned use_dma = 1;
77
78 #if 0
79 //#include <linux/moduleparam.h>
80 /* "modprobe goku_udc use_dma=1" etc
81  *      0 to disable dma
82  *      1 to use IN dma only (normal operation)
83  *      2 to use IN and OUT dma
84  */
85 module_param(use_dma, uint, S_IRUGO);
86 #endif
87
88 /*-------------------------------------------------------------------------*/
89
90 static void nuke(struct goku_ep *, int status);
91
92 static inline void
93 command(struct goku_udc_regs __iomem *regs, int command, unsigned epnum)
94 {
95         writel(COMMAND_EP(epnum) | command, &regs->Command);
96         udelay(300);
97 }
98
99 static int
100 goku_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
101 {
102         struct goku_udc *dev;
103         struct goku_ep  *ep;
104         u32             mode;
105         u16             max;
106         unsigned long   flags;
107
108         ep = container_of(_ep, struct goku_ep, ep);
109         if (!_ep || !desc || ep->desc
110                         || desc->bDescriptorType != USB_DT_ENDPOINT)
111                 return -EINVAL;
112         dev = ep->dev;
113         if (ep == &dev->ep[0])
114                 return -EINVAL;
115         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
116                 return -ESHUTDOWN;
117         if (ep->num != (desc->bEndpointAddress & 0x0f))
118                 return -EINVAL;
119
120         switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
121         case USB_ENDPOINT_XFER_BULK:
122         case USB_ENDPOINT_XFER_INT:
123                 break;
124         default:
125                 return -EINVAL;
126         }
127
128         if ((readl(ep->reg_status) & EPxSTATUS_EP_MASK)
129                         != EPxSTATUS_EP_INVALID)
130                 return -EBUSY;
131
132         /* enabling the no-toggle interrupt mode would need an api hook */
133         mode = 0;
134         max = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize));
135         switch (max) {
136         case 64:        mode++;
137         case 32:        mode++;
138         case 16:        mode++;
139         case 8:         mode <<= 3;
140                         break;
141         default:
142                 return -EINVAL;
143         }
144         mode |= 2 << 1;         /* bulk, or intr-with-toggle */
145
146         /* ep1/ep2 dma direction is chosen early; it works in the other
147          * direction, with pio.  be cautious with out-dma.
148          */
149         ep->is_in = (USB_DIR_IN & desc->bEndpointAddress) != 0;
150         if (ep->is_in) {
151                 mode |= 1;
152                 ep->dma = (use_dma != 0) && (ep->num == UDC_MSTRD_ENDPOINT);
153         } else {
154                 ep->dma = (use_dma == 2) && (ep->num == UDC_MSTWR_ENDPOINT);
155                 if (ep->dma)
156                         DBG(dev, "%s out-dma hides short packets\n",
157                                 ep->ep.name);
158         }
159
160         spin_lock_irqsave(&ep->dev->lock, flags);
161
162         /* ep1 and ep2 can do double buffering and/or dma */
163         if (ep->num < 3) {
164                 struct goku_udc_regs __iomem    *regs = ep->dev->regs;
165                 u32                             tmp;
166
167                 /* double buffer except (for now) with pio in */
168                 tmp = ((ep->dma || !ep->is_in)
169                                 ? 0x10  /* double buffered */
170                                 : 0x11  /* single buffer */
171                         ) << ep->num;
172                 tmp |= readl(&regs->EPxSingle);
173                 writel(tmp, &regs->EPxSingle);
174
175                 tmp = (ep->dma ? 0x10/*dma*/ : 0x11/*pio*/) << ep->num;
176                 tmp |= readl(&regs->EPxBCS);
177                 writel(tmp, &regs->EPxBCS);
178         }
179         writel(mode, ep->reg_mode);
180         command(ep->dev->regs, COMMAND_RESET, ep->num);
181         ep->ep.maxpacket = max;
182         ep->stopped = 0;
183         ep->desc = desc;
184         spin_unlock_irqrestore(&ep->dev->lock, flags);
185
186         DBG(dev, "enable %s %s %s maxpacket %u\n", ep->ep.name,
187                 ep->is_in ? "IN" : "OUT",
188                 ep->dma ? "dma" : "pio",
189                 max);
190
191         return 0;
192 }
193
194 static void ep_reset(struct goku_udc_regs __iomem *regs, struct goku_ep *ep)
195 {
196         struct goku_udc         *dev = ep->dev;
197
198         if (regs) {
199                 command(regs, COMMAND_INVALID, ep->num);
200                 if (ep->num) {
201                         if (ep->num == UDC_MSTWR_ENDPOINT)
202                                 dev->int_enable &= ~(INT_MSTWREND
203                                                         |INT_MSTWRTMOUT);
204                         else if (ep->num == UDC_MSTRD_ENDPOINT)
205                                 dev->int_enable &= ~INT_MSTRDEND;
206                         dev->int_enable &= ~INT_EPxDATASET (ep->num);
207                 } else
208                         dev->int_enable &= ~INT_EP0;
209                 writel(dev->int_enable, &regs->int_enable);
210                 readl(&regs->int_enable);
211                 if (ep->num < 3) {
212                         struct goku_udc_regs __iomem    *r = ep->dev->regs;
213                         u32                             tmp;
214
215                         tmp = readl(&r->EPxSingle);
216                         tmp &= ~(0x11 << ep->num);
217                         writel(tmp, &r->EPxSingle);
218
219                         tmp = readl(&r->EPxBCS);
220                         tmp &= ~(0x11 << ep->num);
221                         writel(tmp, &r->EPxBCS);
222                 }
223                 /* reset dma in case we're still using it */
224                 if (ep->dma) {
225                         u32     master;
226
227                         master = readl(&regs->dma_master) & MST_RW_BITS;
228                         if (ep->num == UDC_MSTWR_ENDPOINT) {
229                                 master &= ~MST_W_BITS;
230                                 master |= MST_WR_RESET;
231                         } else {
232                                 master &= ~MST_R_BITS;
233                                 master |= MST_RD_RESET;
234                         }
235                         writel(master, &regs->dma_master);
236                 }
237         }
238
239         ep->ep.maxpacket = MAX_FIFO_SIZE;
240         ep->desc = NULL;
241         ep->stopped = 1;
242         ep->irqs = 0;
243         ep->dma = 0;
244 }
245
246 static int goku_ep_disable(struct usb_ep *_ep)
247 {
248         struct goku_ep  *ep;
249         struct goku_udc *dev;
250         unsigned long   flags;
251
252         ep = container_of(_ep, struct goku_ep, ep);
253         if (!_ep || !ep->desc)
254                 return -ENODEV;
255         dev = ep->dev;
256         if (dev->ep0state == EP0_SUSPEND)
257                 return -EBUSY;
258
259         VDBG(dev, "disable %s\n", _ep->name);
260
261         spin_lock_irqsave(&dev->lock, flags);
262         nuke(ep, -ESHUTDOWN);
263         ep_reset(dev->regs, ep);
264         spin_unlock_irqrestore(&dev->lock, flags);
265
266         return 0;
267 }
268
269 /*-------------------------------------------------------------------------*/
270
271 static struct usb_request *
272 goku_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
273 {
274         struct goku_request     *req;
275
276         if (!_ep)
277                 return NULL;
278         req = kmalloc(sizeof *req, gfp_flags);
279         if (!req)
280                 return NULL;
281
282         memset(req, 0, sizeof *req);
283         req->req.dma = DMA_ADDR_INVALID;
284         INIT_LIST_HEAD(&req->queue);
285         return &req->req;
286 }
287
288 static void
289 goku_free_request(struct usb_ep *_ep, struct usb_request *_req)
290 {
291         struct goku_request     *req;
292
293         if (!_ep || !_req)
294                 return;
295
296         req = container_of(_req, struct goku_request, req);
297         WARN_ON(!list_empty(&req->queue));
298         kfree(req);
299 }
300
301 /*-------------------------------------------------------------------------*/
302
303 #undef USE_KMALLOC
304
305 /* many common platforms have dma-coherent caches, which means that it's
306  * safe to use kmalloc() memory for all i/o buffers without using any
307  * cache flushing calls.  (unless you're trying to share cache lines
308  * between dma and non-dma activities, which is a slow idea in any case.)
309  *
310  * other platforms need more care, with 2.6 having a moderately general
311  * solution except for the common "buffer is smaller than a page" case.
312  */
313 #if     defined(CONFIG_X86)
314 #define USE_KMALLOC
315
316 #elif   defined(CONFIG_MIPS) && !defined(CONFIG_DMA_NONCOHERENT)
317 #define USE_KMALLOC
318
319 #elif   defined(CONFIG_PPC) && !defined(CONFIG_NOT_COHERENT_CACHE)
320 #define USE_KMALLOC
321
322 #endif
323
324 /* allocating buffers this way eliminates dma mapping overhead, which
325  * on some platforms will mean eliminating a per-io buffer copy.  with
326  * some kinds of system caches, further tweaks may still be needed.
327  */
328 static void *
329 goku_alloc_buffer(struct usb_ep *_ep, unsigned bytes,
330                         dma_addr_t *dma, gfp_t gfp_flags)
331 {
332         void            *retval;
333         struct goku_ep  *ep;
334
335         ep = container_of(_ep, struct goku_ep, ep);
336         if (!_ep)
337                 return NULL;
338         *dma = DMA_ADDR_INVALID;
339
340 #if     defined(USE_KMALLOC)
341         retval = kmalloc(bytes, gfp_flags);
342         if (retval)
343                 *dma = virt_to_phys(retval);
344 #else
345         if (ep->dma) {
346                 /* the main problem with this call is that it wastes memory
347                  * on typical 1/N page allocations: it allocates 1-N pages.
348                  */
349 #warning Using dma_alloc_coherent even with buffers smaller than a page.
350                 retval = dma_alloc_coherent(&ep->dev->pdev->dev,
351                                 bytes, dma, gfp_flags);
352         } else
353                 retval = kmalloc(bytes, gfp_flags);
354 #endif
355         return retval;
356 }
357
358 static void
359 goku_free_buffer(struct usb_ep *_ep, void *buf, dma_addr_t dma, unsigned bytes)
360 {
361         /* free memory into the right allocator */
362 #ifndef USE_KMALLOC
363         if (dma != DMA_ADDR_INVALID) {
364                 struct goku_ep  *ep;
365
366                 ep = container_of(_ep, struct goku_ep, ep);
367                 if (!_ep)
368                         return;
369                 dma_free_coherent(&ep->dev->pdev->dev, bytes, buf, dma);
370         } else
371 #endif
372                 kfree (buf);
373 }
374
375 /*-------------------------------------------------------------------------*/
376
377 static void
378 done(struct goku_ep *ep, struct goku_request *req, int status)
379 {
380         struct goku_udc         *dev;
381         unsigned                stopped = ep->stopped;
382
383         list_del_init(&req->queue);
384
385         if (likely(req->req.status == -EINPROGRESS))
386                 req->req.status = status;
387         else
388                 status = req->req.status;
389
390         dev = ep->dev;
391         if (req->mapped) {
392                 pci_unmap_single(dev->pdev, req->req.dma, req->req.length,
393                         ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
394                 req->req.dma = DMA_ADDR_INVALID;
395                 req->mapped = 0;
396         }
397
398 #ifndef USB_TRACE
399         if (status && status != -ESHUTDOWN)
400 #endif
401                 VDBG(dev, "complete %s req %p stat %d len %u/%u\n",
402                         ep->ep.name, &req->req, status,
403                         req->req.actual, req->req.length);
404
405         /* don't modify queue heads during completion callback */
406         ep->stopped = 1;
407         spin_unlock(&dev->lock);
408         req->req.complete(&ep->ep, &req->req);
409         spin_lock(&dev->lock);
410         ep->stopped = stopped;
411 }
412
413 /*-------------------------------------------------------------------------*/
414
415 static inline int
416 write_packet(u32 __iomem *fifo, u8 *buf, struct goku_request *req, unsigned max)
417 {
418         unsigned        length, count;
419
420         length = min(req->req.length - req->req.actual, max);
421         req->req.actual += length;
422
423         count = length;
424         while (likely(count--))
425                 writel(*buf++, fifo);
426         return length;
427 }
428
429 // return:  0 = still running, 1 = completed, negative = errno
430 static int write_fifo(struct goku_ep *ep, struct goku_request *req)
431 {
432         struct goku_udc *dev = ep->dev;
433         u32             tmp;
434         u8              *buf;
435         unsigned        count;
436         int             is_last;
437
438         tmp = readl(&dev->regs->DataSet);
439         buf = req->req.buf + req->req.actual;
440         prefetch(buf);
441
442         dev = ep->dev;
443         if (unlikely(ep->num == 0 && dev->ep0state != EP0_IN))
444                 return -EL2HLT;
445
446         /* NOTE:  just single-buffered PIO-IN for now.  */
447         if (unlikely((tmp & DATASET_A(ep->num)) != 0))
448                 return 0;
449
450         /* clear our "packet available" irq */
451         if (ep->num != 0)
452                 writel(~INT_EPxDATASET(ep->num), &dev->regs->int_status);
453
454         count = write_packet(ep->reg_fifo, buf, req, ep->ep.maxpacket);
455
456         /* last packet often short (sometimes a zlp, especially on ep0) */
457         if (unlikely(count != ep->ep.maxpacket)) {
458                 writel(~(1<<ep->num), &dev->regs->EOP);
459                 if (ep->num == 0) {
460                         dev->ep[0].stopped = 1;
461                         dev->ep0state = EP0_STATUS;
462                 }
463                 is_last = 1;
464         } else {
465                 if (likely(req->req.length != req->req.actual)
466                                 || req->req.zero)
467                         is_last = 0;
468                 else
469                         is_last = 1;
470         }
471 #if 0           /* printk seemed to trash is_last...*/
472 //#ifdef USB_TRACE
473         VDBG(dev, "wrote %s %u bytes%s IN %u left %p\n",
474                 ep->ep.name, count, is_last ? "/last" : "",
475                 req->req.length - req->req.actual, req);
476 #endif
477
478         /* requests complete when all IN data is in the FIFO,
479          * or sometimes later, if a zlp was needed.
480          */
481         if (is_last) {
482                 done(ep, req, 0);
483                 return 1;
484         }
485
486         return 0;
487 }
488
489 static int read_fifo(struct goku_ep *ep, struct goku_request *req)
490 {
491         struct goku_udc_regs __iomem    *regs;
492         u32                             size, set;
493         u8                              *buf;
494         unsigned                        bufferspace, is_short, dbuff;
495
496         regs = ep->dev->regs;
497 top:
498         buf = req->req.buf + req->req.actual;
499         prefetchw(buf);
500
501         if (unlikely(ep->num == 0 && ep->dev->ep0state != EP0_OUT))
502                 return -EL2HLT;
503
504         dbuff = (ep->num == 1 || ep->num == 2);
505         do {
506                 /* ack dataset irq matching the status we'll handle */
507                 if (ep->num != 0)
508                         writel(~INT_EPxDATASET(ep->num), &regs->int_status);
509
510                 set = readl(&regs->DataSet) & DATASET_AB(ep->num);
511                 size = readl(&regs->EPxSizeLA[ep->num]);
512                 bufferspace = req->req.length - req->req.actual;
513
514                 /* usually do nothing without an OUT packet */
515                 if (likely(ep->num != 0 || bufferspace != 0)) {
516                         if (unlikely(set == 0))
517                                 break;
518                         /* use ep1/ep2 double-buffering for OUT */
519                         if (!(size & PACKET_ACTIVE))
520                                 size = readl(&regs->EPxSizeLB[ep->num]);
521                         if (!(size & PACKET_ACTIVE))    // "can't happen"
522                                 break;
523                         size &= DATASIZE;       /* EPxSizeH == 0 */
524
525                 /* ep0out no-out-data case for set_config, etc */
526                 } else
527                         size = 0;
528
529                 /* read all bytes from this packet */
530                 req->req.actual += size;
531                 is_short = (size < ep->ep.maxpacket);
532 #ifdef USB_TRACE
533                 VDBG(ep->dev, "read %s %u bytes%s OUT req %p %u/%u\n",
534                         ep->ep.name, size, is_short ? "/S" : "",
535                         req, req->req.actual, req->req.length);
536 #endif
537                 while (likely(size-- != 0)) {
538                         u8      byte = (u8) readl(ep->reg_fifo);
539
540                         if (unlikely(bufferspace == 0)) {
541                                 /* this happens when the driver's buffer
542                                  * is smaller than what the host sent.
543                                  * discard the extra data in this packet.
544                                  */
545                                 if (req->req.status != -EOVERFLOW)
546                                         DBG(ep->dev, "%s overflow %u\n",
547                                                 ep->ep.name, size);
548                                 req->req.status = -EOVERFLOW;
549                         } else {
550                                 *buf++ = byte;
551                                 bufferspace--;
552                         }
553                 }
554
555                 /* completion */
556                 if (unlikely(is_short || req->req.actual == req->req.length)) {
557                         if (unlikely(ep->num == 0)) {
558                                 /* non-control endpoints now usable? */
559                                 if (ep->dev->req_config)
560                                         writel(ep->dev->configured
561                                                         ? USBSTATE_CONFIGURED
562                                                         : 0,
563                                                 &regs->UsbState);
564                                 /* ep0out status stage */
565                                 writel(~(1<<0), &regs->EOP);
566                                 ep->stopped = 1;
567                                 ep->dev->ep0state = EP0_STATUS;
568                         }
569                         done(ep, req, 0);
570
571                         /* empty the second buffer asap */
572                         if (dbuff && !list_empty(&ep->queue)) {
573                                 req = list_entry(ep->queue.next,
574                                                 struct goku_request, queue);
575                                 goto top;
576                         }
577                         return 1;
578                 }
579         } while (dbuff);
580         return 0;
581 }
582
583 static inline void
584 pio_irq_enable(struct goku_udc *dev,
585                 struct goku_udc_regs __iomem *regs, int epnum)
586 {
587         dev->int_enable |= INT_EPxDATASET (epnum);
588         writel(dev->int_enable, &regs->int_enable);
589         /* write may still be posted */
590 }
591
592 static inline void
593 pio_irq_disable(struct goku_udc *dev,
594                 struct goku_udc_regs __iomem *regs, int epnum)
595 {
596         dev->int_enable &= ~INT_EPxDATASET (epnum);
597         writel(dev->int_enable, &regs->int_enable);
598         /* write may still be posted */
599 }
600
601 static inline void
602 pio_advance(struct goku_ep *ep)
603 {
604         struct goku_request     *req;
605
606         if (unlikely(list_empty (&ep->queue)))
607                 return;
608         req = list_entry(ep->queue.next, struct goku_request, queue);
609         (ep->is_in ? write_fifo : read_fifo)(ep, req);
610 }
611
612
613 /*-------------------------------------------------------------------------*/
614
615 // return:  0 = q running, 1 = q stopped, negative = errno
616 static int start_dma(struct goku_ep *ep, struct goku_request *req)
617 {
618         struct goku_udc_regs __iomem    *regs = ep->dev->regs;
619         u32                             master;
620         u32                             start = req->req.dma;
621         u32                             end = start + req->req.length - 1;
622
623         master = readl(&regs->dma_master) & MST_RW_BITS;
624
625         /* re-init the bits affecting IN dma; careful with zlps */
626         if (likely(ep->is_in)) {
627                 if (unlikely(master & MST_RD_ENA)) {
628                         DBG (ep->dev, "start, IN active dma %03x!!\n",
629                                 master);
630 //                      return -EL2HLT;
631                 }
632                 writel(end, &regs->in_dma_end);
633                 writel(start, &regs->in_dma_start);
634
635                 master &= ~MST_R_BITS;
636                 if (unlikely(req->req.length == 0))
637                         master = MST_RD_ENA | MST_RD_EOPB;
638                 else if ((req->req.length % ep->ep.maxpacket) != 0
639                                         || req->req.zero)
640                         master = MST_RD_ENA | MST_EOPB_ENA;
641                 else
642                         master = MST_RD_ENA | MST_EOPB_DIS;
643
644                 ep->dev->int_enable |= INT_MSTRDEND;
645
646         /* Goku DMA-OUT merges short packets, which plays poorly with
647          * protocols where short packets mark the transfer boundaries.
648          * The chip supports a nonstandard policy with INT_MSTWRTMOUT,
649          * ending transfers after 3 SOFs; we don't turn it on.
650          */
651         } else {
652                 if (unlikely(master & MST_WR_ENA)) {
653                         DBG (ep->dev, "start, OUT active dma %03x!!\n",
654                                 master);
655 //                      return -EL2HLT;
656                 }
657                 writel(end, &regs->out_dma_end);
658                 writel(start, &regs->out_dma_start);
659
660                 master &= ~MST_W_BITS;
661                 master |= MST_WR_ENA | MST_TIMEOUT_DIS;
662
663                 ep->dev->int_enable |= INT_MSTWREND|INT_MSTWRTMOUT;
664         }
665
666         writel(master, &regs->dma_master);
667         writel(ep->dev->int_enable, &regs->int_enable);
668         return 0;
669 }
670
671 static void dma_advance(struct goku_udc *dev, struct goku_ep *ep)
672 {
673         struct goku_request             *req;
674         struct goku_udc_regs __iomem    *regs = ep->dev->regs;
675         u32                             master;
676
677         master = readl(&regs->dma_master);
678
679         if (unlikely(list_empty(&ep->queue))) {
680 stop:
681                 if (ep->is_in)
682                         dev->int_enable &= ~INT_MSTRDEND;
683                 else
684                         dev->int_enable &= ~(INT_MSTWREND|INT_MSTWRTMOUT);
685                 writel(dev->int_enable, &regs->int_enable);
686                 return;
687         }
688         req = list_entry(ep->queue.next, struct goku_request, queue);
689
690         /* normal hw dma completion (not abort) */
691         if (likely(ep->is_in)) {
692                 if (unlikely(master & MST_RD_ENA))
693                         return;
694                 req->req.actual = readl(&regs->in_dma_current);
695         } else {
696                 if (unlikely(master & MST_WR_ENA))
697                         return;
698
699                 /* hardware merges short packets, and also hides packet
700                  * overruns.  a partial packet MAY be in the fifo here.
701                  */
702                 req->req.actual = readl(&regs->out_dma_current);
703         }
704         req->req.actual -= req->req.dma;
705         req->req.actual++;
706
707 #ifdef USB_TRACE
708         VDBG(dev, "done %s %s dma, %u/%u bytes, req %p\n",
709                 ep->ep.name, ep->is_in ? "IN" : "OUT",
710                 req->req.actual, req->req.length, req);
711 #endif
712         done(ep, req, 0);
713         if (list_empty(&ep->queue))
714                 goto stop;
715         req = list_entry(ep->queue.next, struct goku_request, queue);
716         (void) start_dma(ep, req);
717 }
718
719 static void abort_dma(struct goku_ep *ep, int status)
720 {
721         struct goku_udc_regs __iomem    *regs = ep->dev->regs;
722         struct goku_request             *req;
723         u32                             curr, master;
724
725         /* NAK future host requests, hoping the implicit delay lets the
726          * dma engine finish reading (or writing) its latest packet and
727          * empty the dma buffer (up to 16 bytes).
728          *
729          * This avoids needing to clean up a partial packet in the fifo;
730          * we can't do that for IN without side effects to HALT and TOGGLE.
731          */
732         command(regs, COMMAND_FIFO_DISABLE, ep->num);
733         req = list_entry(ep->queue.next, struct goku_request, queue);
734         master = readl(&regs->dma_master) & MST_RW_BITS;
735
736         /* FIXME using these resets isn't usably documented. this may
737          * not work unless it's followed by disabling the endpoint.
738          *
739          * FIXME the OUT reset path doesn't even behave consistently.
740          */
741         if (ep->is_in) {
742                 if (unlikely((readl(&regs->dma_master) & MST_RD_ENA) == 0))
743                         goto finished;
744                 curr = readl(&regs->in_dma_current);
745
746                 writel(curr, &regs->in_dma_end);
747                 writel(curr, &regs->in_dma_start);
748
749                 master &= ~MST_R_BITS;
750                 master |= MST_RD_RESET;
751                 writel(master, &regs->dma_master);
752
753                 if (readl(&regs->dma_master) & MST_RD_ENA)
754                         DBG(ep->dev, "IN dma active after reset!\n");
755
756         } else {
757                 if (unlikely((readl(&regs->dma_master) & MST_WR_ENA) == 0))
758                         goto finished;
759                 curr = readl(&regs->out_dma_current);
760
761                 writel(curr, &regs->out_dma_end);
762                 writel(curr, &regs->out_dma_start);
763
764                 master &= ~MST_W_BITS;
765                 master |= MST_WR_RESET;
766                 writel(master, &regs->dma_master);
767
768                 if (readl(&regs->dma_master) & MST_WR_ENA)
769                         DBG(ep->dev, "OUT dma active after reset!\n");
770         }
771         req->req.actual = (curr - req->req.dma) + 1;
772         req->req.status = status;
773
774         VDBG(ep->dev, "%s %s %s %d/%d\n", __FUNCTION__, ep->ep.name,
775                 ep->is_in ? "IN" : "OUT",
776                 req->req.actual, req->req.length);
777
778         command(regs, COMMAND_FIFO_ENABLE, ep->num);
779
780         return;
781
782 finished:
783         /* dma already completed; no abort needed */
784         command(regs, COMMAND_FIFO_ENABLE, ep->num);
785         req->req.actual = req->req.length;
786         req->req.status = 0;
787 }
788
789 /*-------------------------------------------------------------------------*/
790
791 static int
792 goku_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
793 {
794         struct goku_request     *req;
795         struct goku_ep          *ep;
796         struct goku_udc         *dev;
797         unsigned long           flags;
798         int                     status;
799
800         /* always require a cpu-view buffer so pio works */
801         req = container_of(_req, struct goku_request, req);
802         if (unlikely(!_req || !_req->complete
803                         || !_req->buf || !list_empty(&req->queue)))
804                 return -EINVAL;
805         ep = container_of(_ep, struct goku_ep, ep);
806         if (unlikely(!_ep || (!ep->desc && ep->num != 0)))
807                 return -EINVAL;
808         dev = ep->dev;
809         if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN))
810                 return -ESHUTDOWN;
811
812         /* can't touch registers when suspended */
813         if (dev->ep0state == EP0_SUSPEND)
814                 return -EBUSY;
815
816         /* set up dma mapping in case the caller didn't */
817         if (ep->dma && _req->dma == DMA_ADDR_INVALID) {
818                 _req->dma = pci_map_single(dev->pdev, _req->buf, _req->length,
819                         ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
820                 req->mapped = 1;
821         }
822
823 #ifdef USB_TRACE
824         VDBG(dev, "%s queue req %p, len %u buf %p\n",
825                         _ep->name, _req, _req->length, _req->buf);
826 #endif
827
828         spin_lock_irqsave(&dev->lock, flags);
829
830         _req->status = -EINPROGRESS;
831         _req->actual = 0;
832
833         /* for ep0 IN without premature status, zlp is required and
834          * writing EOP starts the status stage (OUT).
835          */
836         if (unlikely(ep->num == 0 && ep->is_in))
837                 _req->zero = 1;
838
839         /* kickstart this i/o queue? */
840         status = 0;
841         if (list_empty(&ep->queue) && likely(!ep->stopped)) {
842                 /* dma:  done after dma completion IRQ (or error)
843                  * pio:  done after last fifo operation
844                  */
845                 if (ep->dma)
846                         status = start_dma(ep, req);
847                 else
848                         status = (ep->is_in ? write_fifo : read_fifo)(ep, req);
849
850                 if (unlikely(status != 0)) {
851                         if (status > 0)
852                                 status = 0;
853                         req = NULL;
854                 }
855
856         } /* else pio or dma irq handler advances the queue. */
857
858         if (likely(req != 0))
859                 list_add_tail(&req->queue, &ep->queue);
860
861         if (likely(!list_empty(&ep->queue))
862                         && likely(ep->num != 0)
863                         && !ep->dma
864                         && !(dev->int_enable & INT_EPxDATASET (ep->num)))
865                 pio_irq_enable(dev, dev->regs, ep->num);
866
867         spin_unlock_irqrestore(&dev->lock, flags);
868
869         /* pci writes may still be posted */
870         return status;
871 }
872
873 /* dequeue ALL requests */
874 static void nuke(struct goku_ep *ep, int status)
875 {
876         struct goku_request     *req;
877
878         ep->stopped = 1;
879         if (list_empty(&ep->queue))
880                 return;
881         if (ep->dma)
882                 abort_dma(ep, status);
883         while (!list_empty(&ep->queue)) {
884                 req = list_entry(ep->queue.next, struct goku_request, queue);
885                 done(ep, req, status);
886         }
887 }
888
889 /* dequeue JUST ONE request */
890 static int goku_dequeue(struct usb_ep *_ep, struct usb_request *_req)
891 {
892         struct goku_request     *req;
893         struct goku_ep          *ep;
894         struct goku_udc         *dev;
895         unsigned long           flags;
896
897         ep = container_of(_ep, struct goku_ep, ep);
898         if (!_ep || !_req || (!ep->desc && ep->num != 0))
899                 return -EINVAL;
900         dev = ep->dev;
901         if (!dev->driver)
902                 return -ESHUTDOWN;
903
904         /* we can't touch (dma) registers when suspended */
905         if (dev->ep0state == EP0_SUSPEND)
906                 return -EBUSY;
907
908         VDBG(dev, "%s %s %s %s %p\n", __FUNCTION__, _ep->name,
909                 ep->is_in ? "IN" : "OUT",
910                 ep->dma ? "dma" : "pio",
911                 _req);
912
913         spin_lock_irqsave(&dev->lock, flags);
914
915         /* make sure it's actually queued on this endpoint */
916         list_for_each_entry (req, &ep->queue, queue) {
917                 if (&req->req == _req)
918                         break;
919         }
920         if (&req->req != _req) {
921                 spin_unlock_irqrestore (&dev->lock, flags);
922                 return -EINVAL;
923         }
924
925         if (ep->dma && ep->queue.next == &req->queue && !ep->stopped) {
926                 abort_dma(ep, -ECONNRESET);
927                 done(ep, req, -ECONNRESET);
928                 dma_advance(dev, ep);
929         } else if (!list_empty(&req->queue))
930                 done(ep, req, -ECONNRESET);
931         else
932                 req = NULL;
933         spin_unlock_irqrestore(&dev->lock, flags);
934
935         return req ? 0 : -EOPNOTSUPP;
936 }
937
938 /*-------------------------------------------------------------------------*/
939
940 static void goku_clear_halt(struct goku_ep *ep)
941 {
942         // assert (ep->num !=0)
943         VDBG(ep->dev, "%s clear halt\n", ep->ep.name);
944         command(ep->dev->regs, COMMAND_SETDATA0, ep->num);
945         command(ep->dev->regs, COMMAND_STALL_CLEAR, ep->num);
946         if (ep->stopped) {
947                 ep->stopped = 0;
948                 if (ep->dma) {
949                         struct goku_request     *req;
950
951                         if (list_empty(&ep->queue))
952                                 return;
953                         req = list_entry(ep->queue.next, struct goku_request,
954                                                 queue);
955                         (void) start_dma(ep, req);
956                 } else
957                         pio_advance(ep);
958         }
959 }
960
961 static int goku_set_halt(struct usb_ep *_ep, int value)
962 {
963         struct goku_ep  *ep;
964         unsigned long   flags;
965         int             retval = 0;
966
967         if (!_ep)
968                 return -ENODEV;
969         ep = container_of (_ep, struct goku_ep, ep);
970
971         if (ep->num == 0) {
972                 if (value) {
973                         ep->dev->ep0state = EP0_STALL;
974                         ep->dev->ep[0].stopped = 1;
975                 } else
976                         return -EINVAL;
977
978         /* don't change EPxSTATUS_EP_INVALID to READY */
979         } else if (!ep->desc) {
980                 DBG(ep->dev, "%s %s inactive?\n", __FUNCTION__, ep->ep.name);
981                 return -EINVAL;
982         }
983
984         spin_lock_irqsave(&ep->dev->lock, flags);
985         if (!list_empty(&ep->queue))
986                 retval = -EAGAIN;
987         else if (ep->is_in && value
988                         /* data in (either) packet buffer? */
989                         && (readl(&ep->dev->regs->DataSet)
990                                         & DATASET_AB(ep->num)))
991                 retval = -EAGAIN;
992         else if (!value)
993                 goku_clear_halt(ep);
994         else {
995                 ep->stopped = 1;
996                 VDBG(ep->dev, "%s set halt\n", ep->ep.name);
997                 command(ep->dev->regs, COMMAND_STALL, ep->num);
998                 readl(ep->reg_status);
999         }
1000         spin_unlock_irqrestore(&ep->dev->lock, flags);
1001         return retval;
1002 }
1003
1004 static int goku_fifo_status(struct usb_ep *_ep)
1005 {
1006         struct goku_ep                  *ep;
1007         struct goku_udc_regs __iomem    *regs;
1008         u32                             size;
1009
1010         if (!_ep)
1011                 return -ENODEV;
1012         ep = container_of(_ep, struct goku_ep, ep);
1013
1014         /* size is only reported sanely for OUT */
1015         if (ep->is_in)
1016                 return -EOPNOTSUPP;
1017
1018         /* ignores 16-byte dma buffer; SizeH == 0 */
1019         regs = ep->dev->regs;
1020         size = readl(&regs->EPxSizeLA[ep->num]) & DATASIZE;
1021         size += readl(&regs->EPxSizeLB[ep->num]) & DATASIZE;
1022         VDBG(ep->dev, "%s %s %u\n", __FUNCTION__, ep->ep.name, size);
1023         return size;
1024 }
1025
1026 static void goku_fifo_flush(struct usb_ep *_ep)
1027 {
1028         struct goku_ep                  *ep;
1029         struct goku_udc_regs __iomem    *regs;
1030         u32                             size;
1031
1032         if (!_ep)
1033                 return;
1034         ep = container_of(_ep, struct goku_ep, ep);
1035         VDBG(ep->dev, "%s %s\n", __FUNCTION__, ep->ep.name);
1036
1037         /* don't change EPxSTATUS_EP_INVALID to READY */
1038         if (!ep->desc && ep->num != 0) {
1039                 DBG(ep->dev, "%s %s inactive?\n", __FUNCTION__, ep->ep.name);
1040                 return;
1041         }
1042
1043         regs = ep->dev->regs;
1044         size = readl(&regs->EPxSizeLA[ep->num]);
1045         size &= DATASIZE;
1046
1047         /* Non-desirable behavior:  FIFO_CLEAR also clears the
1048          * endpoint halt feature.  For OUT, we _could_ just read
1049          * the bytes out (PIO, if !ep->dma); for in, no choice.
1050          */
1051         if (size)
1052                 command(regs, COMMAND_FIFO_CLEAR, ep->num);
1053 }
1054
1055 static struct usb_ep_ops goku_ep_ops = {
1056         .enable         = goku_ep_enable,
1057         .disable        = goku_ep_disable,
1058
1059         .alloc_request  = goku_alloc_request,
1060         .free_request   = goku_free_request,
1061
1062         .alloc_buffer   = goku_alloc_buffer,
1063         .free_buffer    = goku_free_buffer,
1064
1065         .queue          = goku_queue,
1066         .dequeue        = goku_dequeue,
1067
1068         .set_halt       = goku_set_halt,
1069         .fifo_status    = goku_fifo_status,
1070         .fifo_flush     = goku_fifo_flush,
1071 };
1072
1073 /*-------------------------------------------------------------------------*/
1074
1075 static int goku_get_frame(struct usb_gadget *_gadget)
1076 {
1077         return -EOPNOTSUPP;
1078 }
1079
1080 static const struct usb_gadget_ops goku_ops = {
1081         .get_frame      = goku_get_frame,
1082         // no remote wakeup
1083         // not selfpowered
1084 };
1085
1086 /*-------------------------------------------------------------------------*/
1087
1088 static inline char *dmastr(void)
1089 {
1090         if (use_dma == 0)
1091                 return "(dma disabled)";
1092         else if (use_dma == 2)
1093                 return "(dma IN and OUT)";
1094         else
1095                 return "(dma IN)";
1096 }
1097
1098 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1099
1100 static const char proc_node_name [] = "driver/udc";
1101
1102 #define FOURBITS "%s%s%s%s"
1103 #define EIGHTBITS FOURBITS FOURBITS
1104
1105 static void
1106 dump_intmask(const char *label, u32 mask, char **next, unsigned *size)
1107 {
1108         int t;
1109
1110         /* int_status is the same format ... */
1111         t = scnprintf(*next, *size,
1112                 "%s %05X =" FOURBITS EIGHTBITS EIGHTBITS "\n",
1113                 label, mask,
1114                 (mask & INT_PWRDETECT) ? " power" : "",
1115                 (mask & INT_SYSERROR) ? " sys" : "",
1116                 (mask & INT_MSTRDEND) ? " in-dma" : "",
1117                 (mask & INT_MSTWRTMOUT) ? " wrtmo" : "",
1118
1119                 (mask & INT_MSTWREND) ? " out-dma" : "",
1120                 (mask & INT_MSTWRSET) ? " wrset" : "",
1121                 (mask & INT_ERR) ? " err" : "",
1122                 (mask & INT_SOF) ? " sof" : "",
1123
1124                 (mask & INT_EP3NAK) ? " ep3nak" : "",
1125                 (mask & INT_EP2NAK) ? " ep2nak" : "",
1126                 (mask & INT_EP1NAK) ? " ep1nak" : "",
1127                 (mask & INT_EP3DATASET) ? " ep3" : "",
1128
1129                 (mask & INT_EP2DATASET) ? " ep2" : "",
1130                 (mask & INT_EP1DATASET) ? " ep1" : "",
1131                 (mask & INT_STATUSNAK) ? " ep0snak" : "",
1132                 (mask & INT_STATUS) ? " ep0status" : "",
1133
1134                 (mask & INT_SETUP) ? " setup" : "",
1135                 (mask & INT_ENDPOINT0) ? " ep0" : "",
1136                 (mask & INT_USBRESET) ? " reset" : "",
1137                 (mask & INT_SUSPEND) ? " suspend" : "");
1138         *size -= t;
1139         *next += t;
1140 }
1141
1142
1143 static int
1144 udc_proc_read(char *buffer, char **start, off_t off, int count,
1145                 int *eof, void *_dev)
1146 {
1147         char                            *buf = buffer;
1148         struct goku_udc                 *dev = _dev;
1149         struct goku_udc_regs __iomem    *regs = dev->regs;
1150         char                            *next = buf;
1151         unsigned                        size = count;
1152         unsigned long                   flags;
1153         int                             i, t, is_usb_connected;
1154         u32                             tmp;
1155
1156         if (off != 0)
1157                 return 0;
1158
1159         local_irq_save(flags);
1160
1161         /* basic device status */
1162         tmp = readl(&regs->power_detect);
1163         is_usb_connected = tmp & PW_DETECT;
1164         t = scnprintf(next, size,
1165                 "%s - %s\n"
1166                 "%s version: %s %s\n"
1167                 "Gadget driver: %s\n"
1168                 "Host %s, %s\n"
1169                 "\n",
1170                 pci_name(dev->pdev), driver_desc,
1171                 driver_name, DRIVER_VERSION, dmastr(),
1172                 dev->driver ? dev->driver->driver.name : "(none)",
1173                 is_usb_connected
1174                         ? ((tmp & PW_PULLUP) ? "full speed" : "powered")
1175                         : "disconnected",
1176                 ({char *tmp;
1177                 switch(dev->ep0state){
1178                 case EP0_DISCONNECT:    tmp = "ep0_disconnect"; break;
1179                 case EP0_IDLE:          tmp = "ep0_idle"; break;
1180                 case EP0_IN:            tmp = "ep0_in"; break;
1181                 case EP0_OUT:           tmp = "ep0_out"; break;
1182                 case EP0_STATUS:        tmp = "ep0_status"; break;
1183                 case EP0_STALL:         tmp = "ep0_stall"; break;
1184                 case EP0_SUSPEND:       tmp = "ep0_suspend"; break;
1185                 default:                tmp = "ep0_?"; break;
1186                 } tmp; })
1187                 );
1188         size -= t;
1189         next += t;
1190
1191         dump_intmask("int_status", readl(&regs->int_status), &next, &size);
1192         dump_intmask("int_enable", readl(&regs->int_enable), &next, &size);
1193
1194         if (!is_usb_connected || !dev->driver || (tmp & PW_PULLUP) == 0)
1195                 goto done;
1196
1197         /* registers for (active) device and ep0 */
1198         t = scnprintf(next, size, "\nirqs %lu\ndataset %02x "
1199                         "single.bcs %02x.%02x state %x addr %u\n",
1200                         dev->irqs, readl(&regs->DataSet),
1201                         readl(&regs->EPxSingle), readl(&regs->EPxBCS),
1202                         readl(&regs->UsbState),
1203                         readl(&regs->address));
1204         size -= t;
1205         next += t;
1206
1207         tmp = readl(&regs->dma_master);
1208         t = scnprintf(next, size,
1209                 "dma %03X =" EIGHTBITS "%s %s\n", tmp,
1210                 (tmp & MST_EOPB_DIS) ? " eopb-" : "",
1211                 (tmp & MST_EOPB_ENA) ? " eopb+" : "",
1212                 (tmp & MST_TIMEOUT_DIS) ? " tmo-" : "",
1213                 (tmp & MST_TIMEOUT_ENA) ? " tmo+" : "",
1214
1215                 (tmp & MST_RD_EOPB) ? " eopb" : "",
1216                 (tmp & MST_RD_RESET) ? " in_reset" : "",
1217                 (tmp & MST_WR_RESET) ? " out_reset" : "",
1218                 (tmp & MST_RD_ENA) ? " IN" : "",
1219
1220                 (tmp & MST_WR_ENA) ? " OUT" : "",
1221                 (tmp & MST_CONNECTION)
1222                         ? "ep1in/ep2out"
1223                         : "ep1out/ep2in");
1224         size -= t;
1225         next += t;
1226
1227         /* dump endpoint queues */
1228         for (i = 0; i < 4; i++) {
1229                 struct goku_ep          *ep = &dev->ep [i];
1230                 struct goku_request     *req;
1231                 int                     t;
1232
1233                 if (i && !ep->desc)
1234                         continue;
1235
1236                 tmp = readl(ep->reg_status);
1237                 t = scnprintf(next, size,
1238                         "%s %s max %u %s, irqs %lu, "
1239                         "status %02x (%s) " FOURBITS "\n",
1240                         ep->ep.name,
1241                         ep->is_in ? "in" : "out",
1242                         ep->ep.maxpacket,
1243                         ep->dma ? "dma" : "pio",
1244                         ep->irqs,
1245                         tmp, ({ char *s;
1246                         switch (tmp & EPxSTATUS_EP_MASK) {
1247                         case EPxSTATUS_EP_READY:
1248                                 s = "ready"; break;
1249                         case EPxSTATUS_EP_DATAIN:
1250                                 s = "packet"; break;
1251                         case EPxSTATUS_EP_FULL:
1252                                 s = "full"; break;
1253                         case EPxSTATUS_EP_TX_ERR:       // host will retry
1254                                 s = "tx_err"; break;
1255                         case EPxSTATUS_EP_RX_ERR:
1256                                 s = "rx_err"; break;
1257                         case EPxSTATUS_EP_BUSY:         /* ep0 only */
1258                                 s = "busy"; break;
1259                         case EPxSTATUS_EP_STALL:
1260                                 s = "stall"; break;
1261                         case EPxSTATUS_EP_INVALID:      // these "can't happen"
1262                                 s = "invalid"; break;
1263                         default:
1264                                 s = "?"; break;
1265                         }; s; }),
1266                         (tmp & EPxSTATUS_TOGGLE) ? "data1" : "data0",
1267                         (tmp & EPxSTATUS_SUSPEND) ? " suspend" : "",
1268                         (tmp & EPxSTATUS_FIFO_DISABLE) ? " disable" : "",
1269                         (tmp & EPxSTATUS_STAGE_ERROR) ? " ep0stat" : ""
1270                         );
1271                 if (t <= 0 || t > size)
1272                         goto done;
1273                 size -= t;
1274                 next += t;
1275
1276                 if (list_empty(&ep->queue)) {
1277                         t = scnprintf(next, size, "\t(nothing queued)\n");
1278                         if (t <= 0 || t > size)
1279                                 goto done;
1280                         size -= t;
1281                         next += t;
1282                         continue;
1283                 }
1284                 list_for_each_entry(req, &ep->queue, queue) {
1285                         if (ep->dma && req->queue.prev == &ep->queue) {
1286                                 if (i == UDC_MSTRD_ENDPOINT)
1287                                         tmp = readl(&regs->in_dma_current);
1288                                 else
1289                                         tmp = readl(&regs->out_dma_current);
1290                                 tmp -= req->req.dma;
1291                                 tmp++;
1292                         } else
1293                                 tmp = req->req.actual;
1294
1295                         t = scnprintf(next, size,
1296                                 "\treq %p len %u/%u buf %p\n",
1297                                 &req->req, tmp, req->req.length,
1298                                 req->req.buf);
1299                         if (t <= 0 || t > size)
1300                                 goto done;
1301                         size -= t;
1302                         next += t;
1303                 }
1304         }
1305
1306 done:
1307         local_irq_restore(flags);
1308         *eof = 1;
1309         return count - size;
1310 }
1311
1312 #endif  /* CONFIG_USB_GADGET_DEBUG_FILES */
1313
1314 /*-------------------------------------------------------------------------*/
1315
1316 static void udc_reinit (struct goku_udc *dev)
1317 {
1318         static char *names [] = { "ep0", "ep1-bulk", "ep2-bulk", "ep3-bulk" };
1319         
1320         unsigned i;
1321
1322         INIT_LIST_HEAD (&dev->gadget.ep_list);
1323         dev->gadget.ep0 = &dev->ep [0].ep;
1324         dev->gadget.speed = USB_SPEED_UNKNOWN;
1325         dev->ep0state = EP0_DISCONNECT;
1326         dev->irqs = 0;
1327
1328         for (i = 0; i < 4; i++) {
1329                 struct goku_ep  *ep = &dev->ep[i];
1330
1331                 ep->num = i;
1332                 ep->ep.name = names[i];
1333                 ep->reg_fifo = &dev->regs->ep_fifo [i];
1334                 ep->reg_status = &dev->regs->ep_status [i];
1335                 ep->reg_mode = &dev->regs->ep_mode[i];
1336
1337                 ep->ep.ops = &goku_ep_ops;
1338                 list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
1339                 ep->dev = dev;
1340                 INIT_LIST_HEAD (&ep->queue);
1341
1342                 ep_reset(NULL, ep);
1343         }
1344
1345         dev->ep[0].reg_mode = NULL;
1346         dev->ep[0].ep.maxpacket = MAX_EP0_SIZE;
1347         list_del_init (&dev->ep[0].ep.ep_list);
1348 }
1349
1350 static void udc_reset(struct goku_udc *dev)
1351 {
1352         struct goku_udc_regs __iomem    *regs = dev->regs;
1353
1354         writel(0, &regs->power_detect);
1355         writel(0, &regs->int_enable);
1356         readl(&regs->int_enable);
1357         dev->int_enable = 0;
1358
1359         /* deassert reset, leave USB D+ at hi-Z (no pullup)
1360          * don't let INT_PWRDETECT sequence begin
1361          */
1362         udelay(250);
1363         writel(PW_RESETB, &regs->power_detect);
1364         readl(&regs->int_enable);
1365 }
1366
1367 static void ep0_start(struct goku_udc *dev)
1368 {
1369         struct goku_udc_regs __iomem    *regs = dev->regs;
1370         unsigned                        i;
1371
1372         VDBG(dev, "%s\n", __FUNCTION__);
1373
1374         udc_reset(dev);
1375         udc_reinit (dev);
1376         //writel(MST_EOPB_ENA | MST_TIMEOUT_ENA, &regs->dma_master);
1377
1378         /* hw handles set_address, set_feature, get_status; maybe more */
1379         writel(   G_REQMODE_SET_INTF | G_REQMODE_GET_INTF
1380                 | G_REQMODE_SET_CONF | G_REQMODE_GET_CONF
1381                 | G_REQMODE_GET_DESC
1382                 | G_REQMODE_CLEAR_FEAT
1383                 , &regs->reqmode);
1384
1385         for (i = 0; i < 4; i++)
1386                 dev->ep[i].irqs = 0;
1387
1388         /* can't modify descriptors after writing UsbReady */
1389         for (i = 0; i < DESC_LEN; i++)
1390                 writel(0, &regs->descriptors[i]);
1391         writel(0, &regs->UsbReady);
1392
1393         /* expect ep0 requests when the host drops reset */
1394         writel(PW_RESETB | PW_PULLUP, &regs->power_detect);
1395         dev->int_enable = INT_DEVWIDE | INT_EP0;
1396         writel(dev->int_enable, &dev->regs->int_enable);
1397         readl(&regs->int_enable);
1398         dev->gadget.speed = USB_SPEED_FULL;
1399         dev->ep0state = EP0_IDLE;
1400 }
1401
1402 static void udc_enable(struct goku_udc *dev)
1403 {
1404         /* start enumeration now, or after power detect irq */
1405         if (readl(&dev->regs->power_detect) & PW_DETECT)
1406                 ep0_start(dev);
1407         else {
1408                 DBG(dev, "%s\n", __FUNCTION__);
1409                 dev->int_enable = INT_PWRDETECT;
1410                 writel(dev->int_enable, &dev->regs->int_enable);
1411         }
1412 }
1413
1414 /*-------------------------------------------------------------------------*/
1415
1416 /* keeping it simple:
1417  * - one bus driver, initted first;
1418  * - one function driver, initted second
1419  */
1420
1421 static struct goku_udc  *the_controller;
1422
1423 /* when a driver is successfully registered, it will receive
1424  * control requests including set_configuration(), which enables
1425  * non-control requests.  then usb traffic follows until a
1426  * disconnect is reported.  then a host may connect again, or
1427  * the driver might get unbound.
1428  */
1429 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1430 {
1431         struct goku_udc *dev = the_controller;
1432         int                     retval;
1433
1434         if (!driver
1435                         || driver->speed != USB_SPEED_FULL
1436                         || !driver->bind
1437                         || !driver->unbind
1438                         || !driver->disconnect
1439                         || !driver->setup)
1440                 return -EINVAL;
1441         if (!dev)
1442                 return -ENODEV;
1443         if (dev->driver)
1444                 return -EBUSY;
1445
1446         /* hook up the driver */
1447         driver->driver.bus = NULL;
1448         dev->driver = driver;
1449         dev->gadget.dev.driver = &driver->driver;
1450         retval = driver->bind(&dev->gadget);
1451         if (retval) {
1452                 DBG(dev, "bind to driver %s --> error %d\n",
1453                                 driver->driver.name, retval);
1454                 dev->driver = NULL;
1455                 dev->gadget.dev.driver = NULL;
1456                 return retval;
1457         }
1458
1459         /* then enable host detection and ep0; and we're ready
1460          * for set_configuration as well as eventual disconnect.
1461          */
1462         udc_enable(dev);
1463
1464         DBG(dev, "registered gadget driver '%s'\n", driver->driver.name);
1465         return 0;
1466 }
1467 EXPORT_SYMBOL(usb_gadget_register_driver);
1468
1469 static void
1470 stop_activity(struct goku_udc *dev, struct usb_gadget_driver *driver)
1471 {
1472         unsigned        i;
1473
1474         DBG (dev, "%s\n", __FUNCTION__);
1475
1476         if (dev->gadget.speed == USB_SPEED_UNKNOWN)
1477                 driver = NULL;
1478
1479         /* disconnect gadget driver after quiesceing hw and the driver */
1480         udc_reset (dev);
1481         for (i = 0; i < 4; i++)
1482                 nuke(&dev->ep [i], -ESHUTDOWN);
1483         if (driver) {
1484                 spin_unlock(&dev->lock);
1485                 driver->disconnect(&dev->gadget);
1486                 spin_lock(&dev->lock);
1487         }
1488
1489         if (dev->driver)
1490                 udc_enable(dev);
1491 }
1492
1493 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1494 {
1495         struct goku_udc *dev = the_controller;
1496         unsigned long   flags;
1497
1498         if (!dev)
1499                 return -ENODEV;
1500         if (!driver || driver != dev->driver)
1501                 return -EINVAL;
1502
1503         spin_lock_irqsave(&dev->lock, flags);
1504         dev->driver = NULL;
1505         stop_activity(dev, driver);
1506         spin_unlock_irqrestore(&dev->lock, flags);
1507
1508         driver->unbind(&dev->gadget);
1509
1510         DBG(dev, "unregistered driver '%s'\n", driver->driver.name);
1511         return 0;
1512 }
1513 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1514
1515
1516 /*-------------------------------------------------------------------------*/
1517
1518 static void ep0_setup(struct goku_udc *dev)
1519 {
1520         struct goku_udc_regs __iomem    *regs = dev->regs;
1521         struct usb_ctrlrequest          ctrl;
1522         int                             tmp;
1523
1524         /* read SETUP packet and enter DATA stage */
1525         ctrl.bRequestType = readl(&regs->bRequestType);
1526         ctrl.bRequest = readl(&regs->bRequest);
1527         ctrl.wValue  = cpu_to_le16((readl(&regs->wValueH)  << 8)
1528                                         | readl(&regs->wValueL));
1529         ctrl.wIndex  = cpu_to_le16((readl(&regs->wIndexH)  << 8)
1530                                         | readl(&regs->wIndexL));
1531         ctrl.wLength = cpu_to_le16((readl(&regs->wLengthH) << 8)
1532                                         | readl(&regs->wLengthL));
1533         writel(0, &regs->SetupRecv);
1534
1535         nuke(&dev->ep[0], 0);
1536         dev->ep[0].stopped = 0;
1537         if (likely(ctrl.bRequestType & USB_DIR_IN)) {
1538                 dev->ep[0].is_in = 1;
1539                 dev->ep0state = EP0_IN;
1540                 /* detect early status stages */
1541                 writel(ICONTROL_STATUSNAK, &dev->regs->IntControl);
1542         } else {
1543                 dev->ep[0].is_in = 0;
1544                 dev->ep0state = EP0_OUT;
1545
1546                 /* NOTE:  CLEAR_FEATURE is done in software so that we can
1547                  * synchronize transfer restarts after bulk IN stalls.  data
1548                  * won't even enter the fifo until the halt is cleared.
1549                  */
1550                 switch (ctrl.bRequest) {
1551                 case USB_REQ_CLEAR_FEATURE:
1552                         switch (ctrl.bRequestType) {
1553                         case USB_RECIP_ENDPOINT:
1554                                 tmp = le16_to_cpu(ctrl.wIndex) & 0x0f;
1555                                 /* active endpoint */
1556                                 if (tmp > 3 || (!dev->ep[tmp].desc && tmp != 0))
1557                                         goto stall;
1558                                 if (ctrl.wIndex & __constant_cpu_to_le16(
1559                                                 USB_DIR_IN)) {
1560                                         if (!dev->ep[tmp].is_in)
1561                                                 goto stall;
1562                                 } else {
1563                                         if (dev->ep[tmp].is_in)
1564                                                 goto stall;
1565                                 }
1566                                 if (ctrl.wValue != __constant_cpu_to_le16(
1567                                                 USB_ENDPOINT_HALT))
1568                                         goto stall;
1569                                 if (tmp)
1570                                         goku_clear_halt(&dev->ep[tmp]);
1571 succeed:
1572                                 /* start ep0out status stage */
1573                                 writel(~(1<<0), &regs->EOP);
1574                                 dev->ep[0].stopped = 1;
1575                                 dev->ep0state = EP0_STATUS;
1576                                 return;
1577                         case USB_RECIP_DEVICE:
1578                                 /* device remote wakeup: always clear */
1579                                 if (ctrl.wValue != __constant_cpu_to_le16(1))
1580                                         goto stall;
1581                                 VDBG(dev, "clear dev remote wakeup\n");
1582                                 goto succeed;
1583                         case USB_RECIP_INTERFACE:
1584                                 goto stall;
1585                         default:                /* pass to gadget driver */
1586                                 break;
1587                         }
1588                         break;
1589                 default:
1590                         break;
1591                 }
1592         }
1593
1594 #ifdef USB_TRACE
1595         VDBG(dev, "SETUP %02x.%02x v%04x i%04x l%04x\n",
1596                 ctrl.bRequestType, ctrl.bRequest,
1597                 le16_to_cpu(ctrl.wValue), le16_to_cpu(ctrl.wIndex),
1598                 le16_to_cpu(ctrl.wLength));
1599 #endif
1600
1601         /* hw wants to know when we're configured (or not) */
1602         dev->req_config = (ctrl.bRequest == USB_REQ_SET_CONFIGURATION
1603                                 && ctrl.bRequestType == USB_RECIP_DEVICE);
1604         if (unlikely(dev->req_config))
1605                 dev->configured = (ctrl.wValue != __constant_cpu_to_le16(0));
1606
1607         /* delegate everything to the gadget driver.
1608          * it may respond after this irq handler returns.
1609          */
1610         spin_unlock (&dev->lock);
1611         tmp = dev->driver->setup(&dev->gadget, &ctrl);
1612         spin_lock (&dev->lock);
1613         if (unlikely(tmp < 0)) {
1614 stall:
1615 #ifdef USB_TRACE
1616                 VDBG(dev, "req %02x.%02x protocol STALL; err %d\n",
1617                                 ctrl.bRequestType, ctrl.bRequest, tmp);
1618 #endif
1619                 command(regs, COMMAND_STALL, 0);
1620                 dev->ep[0].stopped = 1;
1621                 dev->ep0state = EP0_STALL;
1622         }
1623
1624         /* expect at least one data or status stage irq */
1625 }
1626
1627 #define ACK(irqbit) { \
1628                 stat &= ~irqbit; \
1629                 writel(~irqbit, &regs->int_status); \
1630                 handled = 1; \
1631                 }
1632
1633 static irqreturn_t goku_irq(int irq, void *_dev, struct pt_regs *r)
1634 {
1635         struct goku_udc                 *dev = _dev;
1636         struct goku_udc_regs __iomem    *regs = dev->regs;
1637         struct goku_ep                  *ep;
1638         u32                             stat, handled = 0;
1639         unsigned                        i, rescans = 5;
1640
1641         spin_lock(&dev->lock);
1642
1643 rescan:
1644         stat = readl(&regs->int_status) & dev->int_enable;
1645         if (!stat)
1646                 goto done;
1647         dev->irqs++;
1648
1649         /* device-wide irqs */
1650         if (unlikely(stat & INT_DEVWIDE)) {
1651                 if (stat & INT_SYSERROR) {
1652                         ERROR(dev, "system error\n");
1653                         stop_activity(dev, dev->driver);
1654                         stat = 0;
1655                         handled = 1;
1656                         // FIXME have a neater way to prevent re-enumeration
1657                         dev->driver = NULL;
1658                         goto done;
1659                 }
1660                 if (stat & INT_PWRDETECT) {
1661                         writel(~stat, &regs->int_status);
1662                         if (readl(&dev->regs->power_detect) & PW_DETECT) {
1663                                 VDBG(dev, "connect\n");
1664                                 ep0_start(dev);
1665                         } else {
1666                                 DBG(dev, "disconnect\n");
1667                                 if (dev->gadget.speed == USB_SPEED_FULL)
1668                                         stop_activity(dev, dev->driver);
1669                                 dev->ep0state = EP0_DISCONNECT;
1670                                 dev->int_enable = INT_DEVWIDE;
1671                                 writel(dev->int_enable, &dev->regs->int_enable);
1672                         }
1673                         stat = 0;
1674                         handled = 1;
1675                         goto done;
1676                 }
1677                 if (stat & INT_SUSPEND) {
1678                         ACK(INT_SUSPEND);
1679                         if (readl(&regs->ep_status[0]) & EPxSTATUS_SUSPEND) {
1680                                 switch (dev->ep0state) {
1681                                 case EP0_DISCONNECT:
1682                                 case EP0_SUSPEND:
1683                                         goto pm_next;
1684                                 default:
1685                                         break;
1686                                 }
1687                                 DBG(dev, "USB suspend\n");
1688                                 dev->ep0state = EP0_SUSPEND;
1689                                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
1690                                                 && dev->driver
1691                                                 && dev->driver->suspend) {
1692                                         spin_unlock(&dev->lock);
1693                                         dev->driver->suspend(&dev->gadget);
1694                                         spin_lock(&dev->lock);
1695                                 }
1696                         } else {
1697                                 if (dev->ep0state != EP0_SUSPEND) {
1698                                         DBG(dev, "bogus USB resume %d\n",
1699                                                 dev->ep0state);
1700                                         goto pm_next;
1701                                 }
1702                                 DBG(dev, "USB resume\n");
1703                                 dev->ep0state = EP0_IDLE;
1704                                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
1705                                                 && dev->driver
1706                                                 && dev->driver->resume) {
1707                                         spin_unlock(&dev->lock);
1708                                         dev->driver->resume(&dev->gadget);
1709                                         spin_lock(&dev->lock);
1710                                 }
1711                         }
1712                 }
1713 pm_next:
1714                 if (stat & INT_USBRESET) {              /* hub reset done */
1715                         ACK(INT_USBRESET);
1716                         INFO(dev, "USB reset done, gadget %s\n",
1717                                 dev->driver->driver.name);
1718                 }
1719                 // and INT_ERR on some endpoint's crc/bitstuff/... problem
1720         }
1721
1722         /* progress ep0 setup, data, or status stages.
1723          * no transition {EP0_STATUS, EP0_STALL} --> EP0_IDLE; saves irqs
1724          */
1725         if (stat & INT_SETUP) {
1726                 ACK(INT_SETUP);
1727                 dev->ep[0].irqs++;
1728                 ep0_setup(dev);
1729         }
1730         if (stat & INT_STATUSNAK) {
1731                 ACK(INT_STATUSNAK|INT_ENDPOINT0);
1732                 if (dev->ep0state == EP0_IN) {
1733                         ep = &dev->ep[0];
1734                         ep->irqs++;
1735                         nuke(ep, 0);
1736                         writel(~(1<<0), &regs->EOP);
1737                         dev->ep0state = EP0_STATUS;
1738                 }
1739         }
1740         if (stat & INT_ENDPOINT0) {
1741                 ACK(INT_ENDPOINT0);
1742                 ep = &dev->ep[0];
1743                 ep->irqs++;
1744                 pio_advance(ep);
1745         }
1746
1747         /* dma completion */
1748         if (stat & INT_MSTRDEND) {      /* IN */
1749                 ACK(INT_MSTRDEND);
1750                 ep = &dev->ep[UDC_MSTRD_ENDPOINT];
1751                 ep->irqs++;
1752                 dma_advance(dev, ep);
1753         }
1754         if (stat & INT_MSTWREND) {      /* OUT */
1755                 ACK(INT_MSTWREND);
1756                 ep = &dev->ep[UDC_MSTWR_ENDPOINT];
1757                 ep->irqs++;
1758                 dma_advance(dev, ep);
1759         }
1760         if (stat & INT_MSTWRTMOUT) {    /* OUT */
1761                 ACK(INT_MSTWRTMOUT);
1762                 ep = &dev->ep[UDC_MSTWR_ENDPOINT];
1763                 ep->irqs++;
1764                 ERROR(dev, "%s write timeout ?\n", ep->ep.name);
1765                 // reset dma? then dma_advance()
1766         }
1767
1768         /* pio */
1769         for (i = 1; i < 4; i++) {
1770                 u32             tmp = INT_EPxDATASET(i);
1771
1772                 if (!(stat & tmp))
1773                         continue;
1774                 ep = &dev->ep[i];
1775                 pio_advance(ep);
1776                 if (list_empty (&ep->queue))
1777                         pio_irq_disable(dev, regs, i);
1778                 stat &= ~tmp;
1779                 handled = 1;
1780                 ep->irqs++;
1781         }
1782
1783         if (rescans--)
1784                 goto rescan;
1785
1786 done:
1787         (void)readl(&regs->int_enable);
1788         spin_unlock(&dev->lock);
1789         if (stat)
1790                 DBG(dev, "unhandled irq status: %05x (%05x, %05x)\n", stat,
1791                                 readl(&regs->int_status), dev->int_enable);
1792         return IRQ_RETVAL(handled);
1793 }
1794
1795 #undef ACK
1796
1797 /*-------------------------------------------------------------------------*/
1798
1799 static void gadget_release(struct device *_dev)
1800 {
1801         struct goku_udc *dev = dev_get_drvdata(_dev);
1802
1803         kfree(dev);
1804 }
1805
1806 /* tear down the binding between this driver and the pci device */
1807
1808 static void goku_remove(struct pci_dev *pdev)
1809 {
1810         struct goku_udc         *dev = pci_get_drvdata(pdev);
1811
1812         DBG(dev, "%s\n", __FUNCTION__);
1813         /* start with the driver above us */
1814         if (dev->driver) {
1815                 /* should have been done already by driver model core */
1816                 WARN(dev, "pci remove, driver '%s' is still registered\n",
1817                                 dev->driver->driver.name);
1818                 usb_gadget_unregister_driver(dev->driver);
1819         }
1820
1821 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1822         remove_proc_entry(proc_node_name, NULL);
1823 #endif
1824         if (dev->regs)
1825                 udc_reset(dev);
1826         if (dev->got_irq)
1827                 free_irq(pdev->irq, dev);
1828         if (dev->regs)
1829                 iounmap(dev->regs);
1830         if (dev->got_region)
1831                 release_mem_region(pci_resource_start (pdev, 0),
1832                                 pci_resource_len (pdev, 0));
1833         if (dev->enabled)
1834                 pci_disable_device(pdev);
1835         device_unregister(&dev->gadget.dev);
1836
1837         pci_set_drvdata(pdev, NULL);
1838         dev->regs = NULL;
1839         the_controller = NULL;
1840
1841         INFO(dev, "unbind\n");
1842 }
1843
1844 /* wrap this driver around the specified pci device, but
1845  * don't respond over USB until a gadget driver binds to us.
1846  */
1847
1848 static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1849 {
1850         struct goku_udc         *dev = NULL;
1851         unsigned long           resource, len;
1852         void __iomem            *base = NULL;
1853         int                     retval;
1854         char                    buf [8], *bufp;
1855
1856         /* if you want to support more than one controller in a system,
1857          * usb_gadget_driver_{register,unregister}() must change.
1858          */
1859         if (the_controller) {
1860                 WARN(dev, "ignoring %s\n", pci_name(pdev));
1861                 return -EBUSY;
1862         }
1863         if (!pdev->irq) {
1864                 printk(KERN_ERR "Check PCI %s IRQ setup!\n", pci_name(pdev));
1865                 retval = -ENODEV;
1866                 goto done;
1867         }
1868
1869         /* alloc, and start init */
1870         dev = kmalloc (sizeof *dev, SLAB_KERNEL);
1871         if (dev == NULL){
1872                 pr_debug("enomem %s\n", pci_name(pdev));
1873                 retval = -ENOMEM;
1874                 goto done;
1875         }
1876
1877         memset(dev, 0, sizeof *dev);
1878         spin_lock_init(&dev->lock);
1879         dev->pdev = pdev;
1880         dev->gadget.ops = &goku_ops;
1881
1882         /* the "gadget" abstracts/virtualizes the controller */
1883         strcpy(dev->gadget.dev.bus_id, "gadget");
1884         dev->gadget.dev.parent = &pdev->dev;
1885         dev->gadget.dev.dma_mask = pdev->dev.dma_mask;
1886         dev->gadget.dev.release = gadget_release;
1887         dev->gadget.name = driver_name;
1888
1889         /* now all the pci goodies ... */
1890         retval = pci_enable_device(pdev);
1891         if (retval < 0) {
1892                 DBG(dev, "can't enable, %d\n", retval);
1893                 goto done;
1894         }
1895         dev->enabled = 1;
1896
1897         resource = pci_resource_start(pdev, 0);
1898         len = pci_resource_len(pdev, 0);
1899         if (!request_mem_region(resource, len, driver_name)) {
1900                 DBG(dev, "controller already in use\n");
1901                 retval = -EBUSY;
1902                 goto done;
1903         }
1904         dev->got_region = 1;
1905
1906         base = ioremap_nocache(resource, len);
1907         if (base == NULL) {
1908                 DBG(dev, "can't map memory\n");
1909                 retval = -EFAULT;
1910                 goto done;
1911         }
1912         dev->regs = (struct goku_udc_regs __iomem *) base;
1913
1914         pci_set_drvdata(pdev, dev);
1915         INFO(dev, "%s\n", driver_desc);
1916         INFO(dev, "version: " DRIVER_VERSION " %s\n", dmastr());
1917 #ifndef __sparc__
1918         scnprintf(buf, sizeof buf, "%d", pdev->irq);
1919         bufp = buf;
1920 #else
1921         bufp = __irq_itoa(pdev->irq);
1922 #endif
1923         INFO(dev, "irq %s, pci mem %p\n", bufp, base);
1924
1925         /* init to known state, then setup irqs */
1926         udc_reset(dev);
1927         udc_reinit (dev);
1928         if (request_irq(pdev->irq, goku_irq, SA_SHIRQ/*|SA_SAMPLE_RANDOM*/,
1929                         driver_name, dev) != 0) {
1930                 DBG(dev, "request interrupt %s failed\n", bufp);
1931                 retval = -EBUSY;
1932                 goto done;
1933         }
1934         dev->got_irq = 1;
1935         if (use_dma)
1936                 pci_set_master(pdev);
1937
1938
1939 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1940         create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev);
1941 #endif
1942
1943         /* done */
1944         the_controller = dev;
1945         device_register(&dev->gadget.dev);
1946
1947         return 0;
1948
1949 done:
1950         if (dev)
1951                 goku_remove (pdev);
1952         return retval;
1953 }
1954
1955
1956 /*-------------------------------------------------------------------------*/
1957
1958 static struct pci_device_id pci_ids [] = { {
1959         .class =        ((PCI_CLASS_SERIAL_USB << 8) | 0xfe),
1960         .class_mask =   ~0,
1961         .vendor =       0x102f,         /* Toshiba */
1962         .device =       0x0107,         /* this UDC */
1963         .subvendor =    PCI_ANY_ID,
1964         .subdevice =    PCI_ANY_ID,
1965
1966 }, { /* end: all zeroes */ }
1967 };
1968 MODULE_DEVICE_TABLE (pci, pci_ids);
1969
1970 static struct pci_driver goku_pci_driver = {
1971         .name =         (char *) driver_name,
1972         .id_table =     pci_ids,
1973
1974         .probe =        goku_probe,
1975         .remove =       goku_remove,
1976
1977         /* FIXME add power management support */
1978 };
1979
1980 static int __init init (void)
1981 {
1982         return pci_register_driver (&goku_pci_driver);
1983 }
1984 module_init (init);
1985
1986 static void __exit cleanup (void)
1987 {
1988         pci_unregister_driver (&goku_pci_driver);
1989 }
1990 module_exit (cleanup);