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Source at commit be977234bfb4a6dca8a39e7c52165e4cd536ad71 created 12 years 9 months ago. By Lars-Peter Clausen, jz4740: Fix compile error | |
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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 | // #define VERBOSE /* extra debug messages (success too) */ |
24 | // #define USB_TRACE /* packet-level success messages */ |
25 | |
26 | #include <linux/kernel.h> |
27 | #include <linux/module.h> |
28 | #include <linux/pci.h> |
29 | #include <linux/delay.h> |
30 | #include <linux/ioport.h> |
31 | #include <linux/slab.h> |
32 | #include <linux/errno.h> |
33 | #include <linux/init.h> |
34 | #include <linux/timer.h> |
35 | #include <linux/list.h> |
36 | #include <linux/interrupt.h> |
37 | #include <linux/proc_fs.h> |
38 | #include <linux/device.h> |
39 | #include <linux/usb/ch9.h> |
40 | #include <linux/usb/gadget.h> |
41 | |
42 | #include <asm/byteorder.h> |
43 | #include <asm/io.h> |
44 | #include <asm/irq.h> |
45 | #include <asm/system.h> |
46 | #include <asm/unaligned.h> |
47 | |
48 | |
49 | #include "goku_udc.h" |
50 | |
51 | #define DRIVER_DESC "TC86C001 USB Device Controller" |
52 | #define DRIVER_VERSION "30-Oct 2003" |
53 | |
54 | #define DMA_ADDR_INVALID (~(dma_addr_t)0) |
55 | |
56 | static const char driver_name [] = "goku_udc"; |
57 | static const char driver_desc [] = DRIVER_DESC; |
58 | |
59 | MODULE_AUTHOR("source@mvista.com"); |
60 | MODULE_DESCRIPTION(DRIVER_DESC); |
61 | MODULE_LICENSE("GPL"); |
62 | |
63 | |
64 | /* |
65 | * IN dma behaves ok under testing, though the IN-dma abort paths don't |
66 | * seem to behave quite as expected. Used by default. |
67 | * |
68 | * OUT dma documents design problems handling the common "short packet" |
69 | * transfer termination policy; it couldn't be enabled by default, even |
70 | * if the OUT-dma abort problems had a resolution. |
71 | */ |
72 | static unsigned use_dma = 1; |
73 | |
74 | #if 0 |
75 | //#include <linux/moduleparam.h> |
76 | /* "modprobe goku_udc use_dma=1" etc |
77 | * 0 to disable dma |
78 | * 1 to use IN dma only (normal operation) |
79 | * 2 to use IN and OUT dma |
80 | */ |
81 | module_param(use_dma, uint, S_IRUGO); |
82 | #endif |
83 | |
84 | /*-------------------------------------------------------------------------*/ |
85 | |
86 | static void nuke(struct goku_ep *, int status); |
87 | |
88 | static inline void |
89 | command(struct goku_udc_regs __iomem *regs, int command, unsigned epnum) |
90 | { |
91 | writel(COMMAND_EP(epnum) | command, ®s->Command); |
92 | udelay(300); |
93 | } |
94 | |
95 | static int |
96 | goku_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) |
97 | { |
98 | struct goku_udc *dev; |
99 | struct goku_ep *ep; |
100 | u32 mode; |
101 | u16 max; |
102 | unsigned long flags; |
103 | |
104 | ep = container_of(_ep, struct goku_ep, ep); |
105 | if (!_ep || !desc || ep->desc |
106 | || desc->bDescriptorType != USB_DT_ENDPOINT) |
107 | return -EINVAL; |
108 | dev = ep->dev; |
109 | if (ep == &dev->ep[0]) |
110 | return -EINVAL; |
111 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) |
112 | return -ESHUTDOWN; |
113 | if (ep->num != usb_endpoint_num(desc)) |
114 | return -EINVAL; |
115 | |
116 | switch (usb_endpoint_type(desc)) { |
117 | case USB_ENDPOINT_XFER_BULK: |
118 | case USB_ENDPOINT_XFER_INT: |
119 | break; |
120 | default: |
121 | return -EINVAL; |
122 | } |
123 | |
124 | if ((readl(ep->reg_status) & EPxSTATUS_EP_MASK) |
125 | != EPxSTATUS_EP_INVALID) |
126 | return -EBUSY; |
127 | |
128 | /* enabling the no-toggle interrupt mode would need an api hook */ |
129 | mode = 0; |
130 | max = get_unaligned_le16(&desc->wMaxPacketSize); |
131 | switch (max) { |
132 | case 64: mode++; |
133 | case 32: mode++; |
134 | case 16: mode++; |
135 | case 8: mode <<= 3; |
136 | break; |
137 | default: |
138 | return -EINVAL; |
139 | } |
140 | mode |= 2 << 1; /* bulk, or intr-with-toggle */ |
141 | |
142 | /* ep1/ep2 dma direction is chosen early; it works in the other |
143 | * direction, with pio. be cautious with out-dma. |
144 | */ |
145 | ep->is_in = usb_endpoint_dir_in(desc); |
146 | if (ep->is_in) { |
147 | mode |= 1; |
148 | ep->dma = (use_dma != 0) && (ep->num == UDC_MSTRD_ENDPOINT); |
149 | } else { |
150 | ep->dma = (use_dma == 2) && (ep->num == UDC_MSTWR_ENDPOINT); |
151 | if (ep->dma) |
152 | DBG(dev, "%s out-dma hides short packets\n", |
153 | ep->ep.name); |
154 | } |
155 | |
156 | spin_lock_irqsave(&ep->dev->lock, flags); |
157 | |
158 | /* ep1 and ep2 can do double buffering and/or dma */ |
159 | if (ep->num < 3) { |
160 | struct goku_udc_regs __iomem *regs = ep->dev->regs; |
161 | u32 tmp; |
162 | |
163 | /* double buffer except (for now) with pio in */ |
164 | tmp = ((ep->dma || !ep->is_in) |
165 | ? 0x10 /* double buffered */ |
166 | : 0x11 /* single buffer */ |
167 | ) << ep->num; |
168 | tmp |= readl(®s->EPxSingle); |
169 | writel(tmp, ®s->EPxSingle); |
170 | |
171 | tmp = (ep->dma ? 0x10/*dma*/ : 0x11/*pio*/) << ep->num; |
172 | tmp |= readl(®s->EPxBCS); |
173 | writel(tmp, ®s->EPxBCS); |
174 | } |
175 | writel(mode, ep->reg_mode); |
176 | command(ep->dev->regs, COMMAND_RESET, ep->num); |
177 | ep->ep.maxpacket = max; |
178 | ep->stopped = 0; |
179 | ep->desc = desc; |
180 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
181 | |
182 | DBG(dev, "enable %s %s %s maxpacket %u\n", ep->ep.name, |
183 | ep->is_in ? "IN" : "OUT", |
184 | ep->dma ? "dma" : "pio", |
185 | max); |
186 | |
187 | return 0; |
188 | } |
189 | |
190 | static void ep_reset(struct goku_udc_regs __iomem *regs, struct goku_ep *ep) |
191 | { |
192 | struct goku_udc *dev = ep->dev; |
193 | |
194 | if (regs) { |
195 | command(regs, COMMAND_INVALID, ep->num); |
196 | if (ep->num) { |
197 | if (ep->num == UDC_MSTWR_ENDPOINT) |
198 | dev->int_enable &= ~(INT_MSTWREND |
199 | |INT_MSTWRTMOUT); |
200 | else if (ep->num == UDC_MSTRD_ENDPOINT) |
201 | dev->int_enable &= ~INT_MSTRDEND; |
202 | dev->int_enable &= ~INT_EPxDATASET (ep->num); |
203 | } else |
204 | dev->int_enable &= ~INT_EP0; |
205 | writel(dev->int_enable, ®s->int_enable); |
206 | readl(®s->int_enable); |
207 | if (ep->num < 3) { |
208 | struct goku_udc_regs __iomem *r = ep->dev->regs; |
209 | u32 tmp; |
210 | |
211 | tmp = readl(&r->EPxSingle); |
212 | tmp &= ~(0x11 << ep->num); |
213 | writel(tmp, &r->EPxSingle); |
214 | |
215 | tmp = readl(&r->EPxBCS); |
216 | tmp &= ~(0x11 << ep->num); |
217 | writel(tmp, &r->EPxBCS); |
218 | } |
219 | /* reset dma in case we're still using it */ |
220 | if (ep->dma) { |
221 | u32 master; |
222 | |
223 | master = readl(®s->dma_master) & MST_RW_BITS; |
224 | if (ep->num == UDC_MSTWR_ENDPOINT) { |
225 | master &= ~MST_W_BITS; |
226 | master |= MST_WR_RESET; |
227 | } else { |
228 | master &= ~MST_R_BITS; |
229 | master |= MST_RD_RESET; |
230 | } |
231 | writel(master, ®s->dma_master); |
232 | } |
233 | } |
234 | |
235 | ep->ep.maxpacket = MAX_FIFO_SIZE; |
236 | ep->desc = NULL; |
237 | ep->stopped = 1; |
238 | ep->irqs = 0; |
239 | ep->dma = 0; |
240 | } |
241 | |
242 | static int goku_ep_disable(struct usb_ep *_ep) |
243 | { |
244 | struct goku_ep *ep; |
245 | struct goku_udc *dev; |
246 | unsigned long flags; |
247 | |
248 | ep = container_of(_ep, struct goku_ep, ep); |
249 | if (!_ep || !ep->desc) |
250 | return -ENODEV; |
251 | dev = ep->dev; |
252 | if (dev->ep0state == EP0_SUSPEND) |
253 | return -EBUSY; |
254 | |
255 | VDBG(dev, "disable %s\n", _ep->name); |
256 | |
257 | spin_lock_irqsave(&dev->lock, flags); |
258 | nuke(ep, -ESHUTDOWN); |
259 | ep_reset(dev->regs, ep); |
260 | spin_unlock_irqrestore(&dev->lock, flags); |
261 | |
262 | return 0; |
263 | } |
264 | |
265 | /*-------------------------------------------------------------------------*/ |
266 | |
267 | static struct usb_request * |
268 | goku_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) |
269 | { |
270 | struct goku_request *req; |
271 | |
272 | if (!_ep) |
273 | return NULL; |
274 | req = kzalloc(sizeof *req, gfp_flags); |
275 | if (!req) |
276 | return NULL; |
277 | |
278 | req->req.dma = DMA_ADDR_INVALID; |
279 | INIT_LIST_HEAD(&req->queue); |
280 | return &req->req; |
281 | } |
282 | |
283 | static void |
284 | goku_free_request(struct usb_ep *_ep, struct usb_request *_req) |
285 | { |
286 | struct goku_request *req; |
287 | |
288 | if (!_ep || !_req) |
289 | return; |
290 | |
291 | req = container_of(_req, struct goku_request, req); |
292 | WARN_ON(!list_empty(&req->queue)); |
293 | kfree(req); |
294 | } |
295 | |
296 | /*-------------------------------------------------------------------------*/ |
297 | |
298 | static void |
299 | done(struct goku_ep *ep, struct goku_request *req, int status) |
300 | { |
301 | struct goku_udc *dev; |
302 | unsigned stopped = ep->stopped; |
303 | |
304 | list_del_init(&req->queue); |
305 | |
306 | if (likely(req->req.status == -EINPROGRESS)) |
307 | req->req.status = status; |
308 | else |
309 | status = req->req.status; |
310 | |
311 | dev = ep->dev; |
312 | if (req->mapped) { |
313 | pci_unmap_single(dev->pdev, req->req.dma, req->req.length, |
314 | ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); |
315 | req->req.dma = DMA_ADDR_INVALID; |
316 | req->mapped = 0; |
317 | } |
318 | |
319 | #ifndef USB_TRACE |
320 | if (status && status != -ESHUTDOWN) |
321 | #endif |
322 | VDBG(dev, "complete %s req %p stat %d len %u/%u\n", |
323 | ep->ep.name, &req->req, status, |
324 | req->req.actual, req->req.length); |
325 | |
326 | /* don't modify queue heads during completion callback */ |
327 | ep->stopped = 1; |
328 | spin_unlock(&dev->lock); |
329 | req->req.complete(&ep->ep, &req->req); |
330 | spin_lock(&dev->lock); |
331 | ep->stopped = stopped; |
332 | } |
333 | |
334 | /*-------------------------------------------------------------------------*/ |
335 | |
336 | static inline int |
337 | write_packet(u32 __iomem *fifo, u8 *buf, struct goku_request *req, unsigned max) |
338 | { |
339 | unsigned length, count; |
340 | |
341 | length = min(req->req.length - req->req.actual, max); |
342 | req->req.actual += length; |
343 | |
344 | count = length; |
345 | while (likely(count--)) |
346 | writel(*buf++, fifo); |
347 | return length; |
348 | } |
349 | |
350 | // return: 0 = still running, 1 = completed, negative = errno |
351 | static int write_fifo(struct goku_ep *ep, struct goku_request *req) |
352 | { |
353 | struct goku_udc *dev = ep->dev; |
354 | u32 tmp; |
355 | u8 *buf; |
356 | unsigned count; |
357 | int is_last; |
358 | |
359 | tmp = readl(&dev->regs->DataSet); |
360 | buf = req->req.buf + req->req.actual; |
361 | prefetch(buf); |
362 | |
363 | dev = ep->dev; |
364 | if (unlikely(ep->num == 0 && dev->ep0state != EP0_IN)) |
365 | return -EL2HLT; |
366 | |
367 | /* NOTE: just single-buffered PIO-IN for now. */ |
368 | if (unlikely((tmp & DATASET_A(ep->num)) != 0)) |
369 | return 0; |
370 | |
371 | /* clear our "packet available" irq */ |
372 | if (ep->num != 0) |
373 | writel(~INT_EPxDATASET(ep->num), &dev->regs->int_status); |
374 | |
375 | count = write_packet(ep->reg_fifo, buf, req, ep->ep.maxpacket); |
376 | |
377 | /* last packet often short (sometimes a zlp, especially on ep0) */ |
378 | if (unlikely(count != ep->ep.maxpacket)) { |
379 | writel(~(1<<ep->num), &dev->regs->EOP); |
380 | if (ep->num == 0) { |
381 | dev->ep[0].stopped = 1; |
382 | dev->ep0state = EP0_STATUS; |
383 | } |
384 | is_last = 1; |
385 | } else { |
386 | if (likely(req->req.length != req->req.actual) |
387 | || req->req.zero) |
388 | is_last = 0; |
389 | else |
390 | is_last = 1; |
391 | } |
392 | #if 0 /* printk seemed to trash is_last...*/ |
393 | //#ifdef USB_TRACE |
394 | VDBG(dev, "wrote %s %u bytes%s IN %u left %p\n", |
395 | ep->ep.name, count, is_last ? "/last" : "", |
396 | req->req.length - req->req.actual, req); |
397 | #endif |
398 | |
399 | /* requests complete when all IN data is in the FIFO, |
400 | * or sometimes later, if a zlp was needed. |
401 | */ |
402 | if (is_last) { |
403 | done(ep, req, 0); |
404 | return 1; |
405 | } |
406 | |
407 | return 0; |
408 | } |
409 | |
410 | static int read_fifo(struct goku_ep *ep, struct goku_request *req) |
411 | { |
412 | struct goku_udc_regs __iomem *regs; |
413 | u32 size, set; |
414 | u8 *buf; |
415 | unsigned bufferspace, is_short, dbuff; |
416 | |
417 | regs = ep->dev->regs; |
418 | top: |
419 | buf = req->req.buf + req->req.actual; |
420 | prefetchw(buf); |
421 | |
422 | if (unlikely(ep->num == 0 && ep->dev->ep0state != EP0_OUT)) |
423 | return -EL2HLT; |
424 | |
425 | dbuff = (ep->num == 1 || ep->num == 2); |
426 | do { |
427 | /* ack dataset irq matching the status we'll handle */ |
428 | if (ep->num != 0) |
429 | writel(~INT_EPxDATASET(ep->num), ®s->int_status); |
430 | |
431 | set = readl(®s->DataSet) & DATASET_AB(ep->num); |
432 | size = readl(®s->EPxSizeLA[ep->num]); |
433 | bufferspace = req->req.length - req->req.actual; |
434 | |
435 | /* usually do nothing without an OUT packet */ |
436 | if (likely(ep->num != 0 || bufferspace != 0)) { |
437 | if (unlikely(set == 0)) |
438 | break; |
439 | /* use ep1/ep2 double-buffering for OUT */ |
440 | if (!(size & PACKET_ACTIVE)) |
441 | size = readl(®s->EPxSizeLB[ep->num]); |
442 | if (!(size & PACKET_ACTIVE)) /* "can't happen" */ |
443 | break; |
444 | size &= DATASIZE; /* EPxSizeH == 0 */ |
445 | |
446 | /* ep0out no-out-data case for set_config, etc */ |
447 | } else |
448 | size = 0; |
449 | |
450 | /* read all bytes from this packet */ |
451 | req->req.actual += size; |
452 | is_short = (size < ep->ep.maxpacket); |
453 | #ifdef USB_TRACE |
454 | VDBG(ep->dev, "read %s %u bytes%s OUT req %p %u/%u\n", |
455 | ep->ep.name, size, is_short ? "/S" : "", |
456 | req, req->req.actual, req->req.length); |
457 | #endif |
458 | while (likely(size-- != 0)) { |
459 | u8 byte = (u8) readl(ep->reg_fifo); |
460 | |
461 | if (unlikely(bufferspace == 0)) { |
462 | /* this happens when the driver's buffer |
463 | * is smaller than what the host sent. |
464 | * discard the extra data in this packet. |
465 | */ |
466 | if (req->req.status != -EOVERFLOW) |
467 | DBG(ep->dev, "%s overflow %u\n", |
468 | ep->ep.name, size); |
469 | req->req.status = -EOVERFLOW; |
470 | } else { |
471 | *buf++ = byte; |
472 | bufferspace--; |
473 | } |
474 | } |
475 | |
476 | /* completion */ |
477 | if (unlikely(is_short || req->req.actual == req->req.length)) { |
478 | if (unlikely(ep->num == 0)) { |
479 | /* non-control endpoints now usable? */ |
480 | if (ep->dev->req_config) |
481 | writel(ep->dev->configured |
482 | ? USBSTATE_CONFIGURED |
483 | : 0, |
484 | ®s->UsbState); |
485 | /* ep0out status stage */ |
486 | writel(~(1<<0), ®s->EOP); |
487 | ep->stopped = 1; |
488 | ep->dev->ep0state = EP0_STATUS; |
489 | } |
490 | done(ep, req, 0); |
491 | |
492 | /* empty the second buffer asap */ |
493 | if (dbuff && !list_empty(&ep->queue)) { |
494 | req = list_entry(ep->queue.next, |
495 | struct goku_request, queue); |
496 | goto top; |
497 | } |
498 | return 1; |
499 | } |
500 | } while (dbuff); |
501 | return 0; |
502 | } |
503 | |
504 | static inline void |
505 | pio_irq_enable(struct goku_udc *dev, |
506 | struct goku_udc_regs __iomem *regs, int epnum) |
507 | { |
508 | dev->int_enable |= INT_EPxDATASET (epnum); |
509 | writel(dev->int_enable, ®s->int_enable); |
510 | /* write may still be posted */ |
511 | } |
512 | |
513 | static inline void |
514 | pio_irq_disable(struct goku_udc *dev, |
515 | struct goku_udc_regs __iomem *regs, int epnum) |
516 | { |
517 | dev->int_enable &= ~INT_EPxDATASET (epnum); |
518 | writel(dev->int_enable, ®s->int_enable); |
519 | /* write may still be posted */ |
520 | } |
521 | |
522 | static inline void |
523 | pio_advance(struct goku_ep *ep) |
524 | { |
525 | struct goku_request *req; |
526 | |
527 | if (unlikely(list_empty (&ep->queue))) |
528 | return; |
529 | req = list_entry(ep->queue.next, struct goku_request, queue); |
530 | (ep->is_in ? write_fifo : read_fifo)(ep, req); |
531 | } |
532 | |
533 | |
534 | /*-------------------------------------------------------------------------*/ |
535 | |
536 | // return: 0 = q running, 1 = q stopped, negative = errno |
537 | static int start_dma(struct goku_ep *ep, struct goku_request *req) |
538 | { |
539 | struct goku_udc_regs __iomem *regs = ep->dev->regs; |
540 | u32 master; |
541 | u32 start = req->req.dma; |
542 | u32 end = start + req->req.length - 1; |
543 | |
544 | master = readl(®s->dma_master) & MST_RW_BITS; |
545 | |
546 | /* re-init the bits affecting IN dma; careful with zlps */ |
547 | if (likely(ep->is_in)) { |
548 | if (unlikely(master & MST_RD_ENA)) { |
549 | DBG (ep->dev, "start, IN active dma %03x!!\n", |
550 | master); |
551 | // return -EL2HLT; |
552 | } |
553 | writel(end, ®s->in_dma_end); |
554 | writel(start, ®s->in_dma_start); |
555 | |
556 | master &= ~MST_R_BITS; |
557 | if (unlikely(req->req.length == 0)) |
558 | master = MST_RD_ENA | MST_RD_EOPB; |
559 | else if ((req->req.length % ep->ep.maxpacket) != 0 |
560 | || req->req.zero) |
561 | master = MST_RD_ENA | MST_EOPB_ENA; |
562 | else |
563 | master = MST_RD_ENA | MST_EOPB_DIS; |
564 | |
565 | ep->dev->int_enable |= INT_MSTRDEND; |
566 | |
567 | /* Goku DMA-OUT merges short packets, which plays poorly with |
568 | * protocols where short packets mark the transfer boundaries. |
569 | * The chip supports a nonstandard policy with INT_MSTWRTMOUT, |
570 | * ending transfers after 3 SOFs; we don't turn it on. |
571 | */ |
572 | } else { |
573 | if (unlikely(master & MST_WR_ENA)) { |
574 | DBG (ep->dev, "start, OUT active dma %03x!!\n", |
575 | master); |
576 | // return -EL2HLT; |
577 | } |
578 | writel(end, ®s->out_dma_end); |
579 | writel(start, ®s->out_dma_start); |
580 | |
581 | master &= ~MST_W_BITS; |
582 | master |= MST_WR_ENA | MST_TIMEOUT_DIS; |
583 | |
584 | ep->dev->int_enable |= INT_MSTWREND|INT_MSTWRTMOUT; |
585 | } |
586 | |
587 | writel(master, ®s->dma_master); |
588 | writel(ep->dev->int_enable, ®s->int_enable); |
589 | return 0; |
590 | } |
591 | |
592 | static void dma_advance(struct goku_udc *dev, struct goku_ep *ep) |
593 | { |
594 | struct goku_request *req; |
595 | struct goku_udc_regs __iomem *regs = ep->dev->regs; |
596 | u32 master; |
597 | |
598 | master = readl(®s->dma_master); |
599 | |
600 | if (unlikely(list_empty(&ep->queue))) { |
601 | stop: |
602 | if (ep->is_in) |
603 | dev->int_enable &= ~INT_MSTRDEND; |
604 | else |
605 | dev->int_enable &= ~(INT_MSTWREND|INT_MSTWRTMOUT); |
606 | writel(dev->int_enable, ®s->int_enable); |
607 | return; |
608 | } |
609 | req = list_entry(ep->queue.next, struct goku_request, queue); |
610 | |
611 | /* normal hw dma completion (not abort) */ |
612 | if (likely(ep->is_in)) { |
613 | if (unlikely(master & MST_RD_ENA)) |
614 | return; |
615 | req->req.actual = readl(®s->in_dma_current); |
616 | } else { |
617 | if (unlikely(master & MST_WR_ENA)) |
618 | return; |
619 | |
620 | /* hardware merges short packets, and also hides packet |
621 | * overruns. a partial packet MAY be in the fifo here. |
622 | */ |
623 | req->req.actual = readl(®s->out_dma_current); |
624 | } |
625 | req->req.actual -= req->req.dma; |
626 | req->req.actual++; |
627 | |
628 | #ifdef USB_TRACE |
629 | VDBG(dev, "done %s %s dma, %u/%u bytes, req %p\n", |
630 | ep->ep.name, ep->is_in ? "IN" : "OUT", |
631 | req->req.actual, req->req.length, req); |
632 | #endif |
633 | done(ep, req, 0); |
634 | if (list_empty(&ep->queue)) |
635 | goto stop; |
636 | req = list_entry(ep->queue.next, struct goku_request, queue); |
637 | (void) start_dma(ep, req); |
638 | } |
639 | |
640 | static void abort_dma(struct goku_ep *ep, int status) |
641 | { |
642 | struct goku_udc_regs __iomem *regs = ep->dev->regs; |
643 | struct goku_request *req; |
644 | u32 curr, master; |
645 | |
646 | /* NAK future host requests, hoping the implicit delay lets the |
647 | * dma engine finish reading (or writing) its latest packet and |
648 | * empty the dma buffer (up to 16 bytes). |
649 | * |
650 | * This avoids needing to clean up a partial packet in the fifo; |
651 | * we can't do that for IN without side effects to HALT and TOGGLE. |
652 | */ |
653 | command(regs, COMMAND_FIFO_DISABLE, ep->num); |
654 | req = list_entry(ep->queue.next, struct goku_request, queue); |
655 | master = readl(®s->dma_master) & MST_RW_BITS; |
656 | |
657 | /* FIXME using these resets isn't usably documented. this may |
658 | * not work unless it's followed by disabling the endpoint. |
659 | * |
660 | * FIXME the OUT reset path doesn't even behave consistently. |
661 | */ |
662 | if (ep->is_in) { |
663 | if (unlikely((readl(®s->dma_master) & MST_RD_ENA) == 0)) |
664 | goto finished; |
665 | curr = readl(®s->in_dma_current); |
666 | |
667 | writel(curr, ®s->in_dma_end); |
668 | writel(curr, ®s->in_dma_start); |
669 | |
670 | master &= ~MST_R_BITS; |
671 | master |= MST_RD_RESET; |
672 | writel(master, ®s->dma_master); |
673 | |
674 | if (readl(®s->dma_master) & MST_RD_ENA) |
675 | DBG(ep->dev, "IN dma active after reset!\n"); |
676 | |
677 | } else { |
678 | if (unlikely((readl(®s->dma_master) & MST_WR_ENA) == 0)) |
679 | goto finished; |
680 | curr = readl(®s->out_dma_current); |
681 | |
682 | writel(curr, ®s->out_dma_end); |
683 | writel(curr, ®s->out_dma_start); |
684 | |
685 | master &= ~MST_W_BITS; |
686 | master |= MST_WR_RESET; |
687 | writel(master, ®s->dma_master); |
688 | |
689 | if (readl(®s->dma_master) & MST_WR_ENA) |
690 | DBG(ep->dev, "OUT dma active after reset!\n"); |
691 | } |
692 | req->req.actual = (curr - req->req.dma) + 1; |
693 | req->req.status = status; |
694 | |
695 | VDBG(ep->dev, "%s %s %s %d/%d\n", __func__, ep->ep.name, |
696 | ep->is_in ? "IN" : "OUT", |
697 | req->req.actual, req->req.length); |
698 | |
699 | command(regs, COMMAND_FIFO_ENABLE, ep->num); |
700 | |
701 | return; |
702 | |
703 | finished: |
704 | /* dma already completed; no abort needed */ |
705 | command(regs, COMMAND_FIFO_ENABLE, ep->num); |
706 | req->req.actual = req->req.length; |
707 | req->req.status = 0; |
708 | } |
709 | |
710 | /*-------------------------------------------------------------------------*/ |
711 | |
712 | static int |
713 | goku_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) |
714 | { |
715 | struct goku_request *req; |
716 | struct goku_ep *ep; |
717 | struct goku_udc *dev; |
718 | unsigned long flags; |
719 | int status; |
720 | |
721 | /* always require a cpu-view buffer so pio works */ |
722 | req = container_of(_req, struct goku_request, req); |
723 | if (unlikely(!_req || !_req->complete |
724 | || !_req->buf || !list_empty(&req->queue))) |
725 | return -EINVAL; |
726 | ep = container_of(_ep, struct goku_ep, ep); |
727 | if (unlikely(!_ep || (!ep->desc && ep->num != 0))) |
728 | return -EINVAL; |
729 | dev = ep->dev; |
730 | if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) |
731 | return -ESHUTDOWN; |
732 | |
733 | /* can't touch registers when suspended */ |
734 | if (dev->ep0state == EP0_SUSPEND) |
735 | return -EBUSY; |
736 | |
737 | /* set up dma mapping in case the caller didn't */ |
738 | if (ep->dma && _req->dma == DMA_ADDR_INVALID) { |
739 | _req->dma = pci_map_single(dev->pdev, _req->buf, _req->length, |
740 | ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); |
741 | req->mapped = 1; |
742 | } |
743 | |
744 | #ifdef USB_TRACE |
745 | VDBG(dev, "%s queue req %p, len %u buf %p\n", |
746 | _ep->name, _req, _req->length, _req->buf); |
747 | #endif |
748 | |
749 | spin_lock_irqsave(&dev->lock, flags); |
750 | |
751 | _req->status = -EINPROGRESS; |
752 | _req->actual = 0; |
753 | |
754 | /* for ep0 IN without premature status, zlp is required and |
755 | * writing EOP starts the status stage (OUT). |
756 | */ |
757 | if (unlikely(ep->num == 0 && ep->is_in)) |
758 | _req->zero = 1; |
759 | |
760 | /* kickstart this i/o queue? */ |
761 | status = 0; |
762 | if (list_empty(&ep->queue) && likely(!ep->stopped)) { |
763 | /* dma: done after dma completion IRQ (or error) |
764 | * pio: done after last fifo operation |
765 | */ |
766 | if (ep->dma) |
767 | status = start_dma(ep, req); |
768 | else |
769 | status = (ep->is_in ? write_fifo : read_fifo)(ep, req); |
770 | |
771 | if (unlikely(status != 0)) { |
772 | if (status > 0) |
773 | status = 0; |
774 | req = NULL; |
775 | } |
776 | |
777 | } /* else pio or dma irq handler advances the queue. */ |
778 | |
779 | if (likely(req != 0)) |
780 | list_add_tail(&req->queue, &ep->queue); |
781 | |
782 | if (likely(!list_empty(&ep->queue)) |
783 | && likely(ep->num != 0) |
784 | && !ep->dma |
785 | && !(dev->int_enable & INT_EPxDATASET (ep->num))) |
786 | pio_irq_enable(dev, dev->regs, ep->num); |
787 | |
788 | spin_unlock_irqrestore(&dev->lock, flags); |
789 | |
790 | /* pci writes may still be posted */ |
791 | return status; |
792 | } |
793 | |
794 | /* dequeue ALL requests */ |
795 | static void nuke(struct goku_ep *ep, int status) |
796 | { |
797 | struct goku_request *req; |
798 | |
799 | ep->stopped = 1; |
800 | if (list_empty(&ep->queue)) |
801 | return; |
802 | if (ep->dma) |
803 | abort_dma(ep, status); |
804 | while (!list_empty(&ep->queue)) { |
805 | req = list_entry(ep->queue.next, struct goku_request, queue); |
806 | done(ep, req, status); |
807 | } |
808 | } |
809 | |
810 | /* dequeue JUST ONE request */ |
811 | static int goku_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
812 | { |
813 | struct goku_request *req; |
814 | struct goku_ep *ep; |
815 | struct goku_udc *dev; |
816 | unsigned long flags; |
817 | |
818 | ep = container_of(_ep, struct goku_ep, ep); |
819 | if (!_ep || !_req || (!ep->desc && ep->num != 0)) |
820 | return -EINVAL; |
821 | dev = ep->dev; |
822 | if (!dev->driver) |
823 | return -ESHUTDOWN; |
824 | |
825 | /* we can't touch (dma) registers when suspended */ |
826 | if (dev->ep0state == EP0_SUSPEND) |
827 | return -EBUSY; |
828 | |
829 | VDBG(dev, "%s %s %s %s %p\n", __func__, _ep->name, |
830 | ep->is_in ? "IN" : "OUT", |
831 | ep->dma ? "dma" : "pio", |
832 | _req); |
833 | |
834 | spin_lock_irqsave(&dev->lock, flags); |
835 | |
836 | /* make sure it's actually queued on this endpoint */ |
837 | list_for_each_entry (req, &ep->queue, queue) { |
838 | if (&req->req == _req) |
839 | break; |
840 | } |
841 | if (&req->req != _req) { |
842 | spin_unlock_irqrestore (&dev->lock, flags); |
843 | return -EINVAL; |
844 | } |
845 | |
846 | if (ep->dma && ep->queue.next == &req->queue && !ep->stopped) { |
847 | abort_dma(ep, -ECONNRESET); |
848 | done(ep, req, -ECONNRESET); |
849 | dma_advance(dev, ep); |
850 | } else if (!list_empty(&req->queue)) |
851 | done(ep, req, -ECONNRESET); |
852 | else |
853 | req = NULL; |
854 | spin_unlock_irqrestore(&dev->lock, flags); |
855 | |
856 | return req ? 0 : -EOPNOTSUPP; |
857 | } |
858 | |
859 | /*-------------------------------------------------------------------------*/ |
860 | |
861 | static void goku_clear_halt(struct goku_ep *ep) |
862 | { |
863 | // assert (ep->num !=0) |
864 | VDBG(ep->dev, "%s clear halt\n", ep->ep.name); |
865 | command(ep->dev->regs, COMMAND_SETDATA0, ep->num); |
866 | command(ep->dev->regs, COMMAND_STALL_CLEAR, ep->num); |
867 | if (ep->stopped) { |
868 | ep->stopped = 0; |
869 | if (ep->dma) { |
870 | struct goku_request *req; |
871 | |
872 | if (list_empty(&ep->queue)) |
873 | return; |
874 | req = list_entry(ep->queue.next, struct goku_request, |
875 | queue); |
876 | (void) start_dma(ep, req); |
877 | } else |
878 | pio_advance(ep); |
879 | } |
880 | } |
881 | |
882 | static int goku_set_halt(struct usb_ep *_ep, int value) |
883 | { |
884 | struct goku_ep *ep; |
885 | unsigned long flags; |
886 | int retval = 0; |
887 | |
888 | if (!_ep) |
889 | return -ENODEV; |
890 | ep = container_of (_ep, struct goku_ep, ep); |
891 | |
892 | if (ep->num == 0) { |
893 | if (value) { |
894 | ep->dev->ep0state = EP0_STALL; |
895 | ep->dev->ep[0].stopped = 1; |
896 | } else |
897 | return -EINVAL; |
898 | |
899 | /* don't change EPxSTATUS_EP_INVALID to READY */ |
900 | } else if (!ep->desc) { |
901 | DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name); |
902 | return -EINVAL; |
903 | } |
904 | |
905 | spin_lock_irqsave(&ep->dev->lock, flags); |
906 | if (!list_empty(&ep->queue)) |
907 | retval = -EAGAIN; |
908 | else if (ep->is_in && value |
909 | /* data in (either) packet buffer? */ |
910 | && (readl(&ep->dev->regs->DataSet) |
911 | & DATASET_AB(ep->num))) |
912 | retval = -EAGAIN; |
913 | else if (!value) |
914 | goku_clear_halt(ep); |
915 | else { |
916 | ep->stopped = 1; |
917 | VDBG(ep->dev, "%s set halt\n", ep->ep.name); |
918 | command(ep->dev->regs, COMMAND_STALL, ep->num); |
919 | readl(ep->reg_status); |
920 | } |
921 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
922 | return retval; |
923 | } |
924 | |
925 | static int goku_fifo_status(struct usb_ep *_ep) |
926 | { |
927 | struct goku_ep *ep; |
928 | struct goku_udc_regs __iomem *regs; |
929 | u32 size; |
930 | |
931 | if (!_ep) |
932 | return -ENODEV; |
933 | ep = container_of(_ep, struct goku_ep, ep); |
934 | |
935 | /* size is only reported sanely for OUT */ |
936 | if (ep->is_in) |
937 | return -EOPNOTSUPP; |
938 | |
939 | /* ignores 16-byte dma buffer; SizeH == 0 */ |
940 | regs = ep->dev->regs; |
941 | size = readl(®s->EPxSizeLA[ep->num]) & DATASIZE; |
942 | size += readl(®s->EPxSizeLB[ep->num]) & DATASIZE; |
943 | VDBG(ep->dev, "%s %s %u\n", __func__, ep->ep.name, size); |
944 | return size; |
945 | } |
946 | |
947 | static void goku_fifo_flush(struct usb_ep *_ep) |
948 | { |
949 | struct goku_ep *ep; |
950 | struct goku_udc_regs __iomem *regs; |
951 | u32 size; |
952 | |
953 | if (!_ep) |
954 | return; |
955 | ep = container_of(_ep, struct goku_ep, ep); |
956 | VDBG(ep->dev, "%s %s\n", __func__, ep->ep.name); |
957 | |
958 | /* don't change EPxSTATUS_EP_INVALID to READY */ |
959 | if (!ep->desc && ep->num != 0) { |
960 | DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name); |
961 | return; |
962 | } |
963 | |
964 | regs = ep->dev->regs; |
965 | size = readl(®s->EPxSizeLA[ep->num]); |
966 | size &= DATASIZE; |
967 | |
968 | /* Non-desirable behavior: FIFO_CLEAR also clears the |
969 | * endpoint halt feature. For OUT, we _could_ just read |
970 | * the bytes out (PIO, if !ep->dma); for in, no choice. |
971 | */ |
972 | if (size) |
973 | command(regs, COMMAND_FIFO_CLEAR, ep->num); |
974 | } |
975 | |
976 | static struct usb_ep_ops goku_ep_ops = { |
977 | .enable = goku_ep_enable, |
978 | .disable = goku_ep_disable, |
979 | |
980 | .alloc_request = goku_alloc_request, |
981 | .free_request = goku_free_request, |
982 | |
983 | .queue = goku_queue, |
984 | .dequeue = goku_dequeue, |
985 | |
986 | .set_halt = goku_set_halt, |
987 | .fifo_status = goku_fifo_status, |
988 | .fifo_flush = goku_fifo_flush, |
989 | }; |
990 | |
991 | /*-------------------------------------------------------------------------*/ |
992 | |
993 | static int goku_get_frame(struct usb_gadget *_gadget) |
994 | { |
995 | return -EOPNOTSUPP; |
996 | } |
997 | |
998 | static const struct usb_gadget_ops goku_ops = { |
999 | .get_frame = goku_get_frame, |
1000 | // no remote wakeup |
1001 | // not selfpowered |
1002 | }; |
1003 | |
1004 | /*-------------------------------------------------------------------------*/ |
1005 | |
1006 | static inline char *dmastr(void) |
1007 | { |
1008 | if (use_dma == 0) |
1009 | return "(dma disabled)"; |
1010 | else if (use_dma == 2) |
1011 | return "(dma IN and OUT)"; |
1012 | else |
1013 | return "(dma IN)"; |
1014 | } |
1015 | |
1016 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES |
1017 | |
1018 | static const char proc_node_name [] = "driver/udc"; |
1019 | |
1020 | #define FOURBITS "%s%s%s%s" |
1021 | #define EIGHTBITS FOURBITS FOURBITS |
1022 | |
1023 | static void |
1024 | dump_intmask(const char *label, u32 mask, char **next, unsigned *size) |
1025 | { |
1026 | int t; |
1027 | |
1028 | /* int_status is the same format ... */ |
1029 | t = scnprintf(*next, *size, |
1030 | "%s %05X =" FOURBITS EIGHTBITS EIGHTBITS "\n", |
1031 | label, mask, |
1032 | (mask & INT_PWRDETECT) ? " power" : "", |
1033 | (mask & INT_SYSERROR) ? " sys" : "", |
1034 | (mask & INT_MSTRDEND) ? " in-dma" : "", |
1035 | (mask & INT_MSTWRTMOUT) ? " wrtmo" : "", |
1036 | |
1037 | (mask & INT_MSTWREND) ? " out-dma" : "", |
1038 | (mask & INT_MSTWRSET) ? " wrset" : "", |
1039 | (mask & INT_ERR) ? " err" : "", |
1040 | (mask & INT_SOF) ? " sof" : "", |
1041 | |
1042 | (mask & INT_EP3NAK) ? " ep3nak" : "", |
1043 | (mask & INT_EP2NAK) ? " ep2nak" : "", |
1044 | (mask & INT_EP1NAK) ? " ep1nak" : "", |
1045 | (mask & INT_EP3DATASET) ? " ep3" : "", |
1046 | |
1047 | (mask & INT_EP2DATASET) ? " ep2" : "", |
1048 | (mask & INT_EP1DATASET) ? " ep1" : "", |
1049 | (mask & INT_STATUSNAK) ? " ep0snak" : "", |
1050 | (mask & INT_STATUS) ? " ep0status" : "", |
1051 | |
1052 | (mask & INT_SETUP) ? " setup" : "", |
1053 | (mask & INT_ENDPOINT0) ? " ep0" : "", |
1054 | (mask & INT_USBRESET) ? " reset" : "", |
1055 | (mask & INT_SUSPEND) ? " suspend" : ""); |
1056 | *size -= t; |
1057 | *next += t; |
1058 | } |
1059 | |
1060 | |
1061 | static int |
1062 | udc_proc_read(char *buffer, char **start, off_t off, int count, |
1063 | int *eof, void *_dev) |
1064 | { |
1065 | char *buf = buffer; |
1066 | struct goku_udc *dev = _dev; |
1067 | struct goku_udc_regs __iomem *regs = dev->regs; |
1068 | char *next = buf; |
1069 | unsigned size = count; |
1070 | unsigned long flags; |
1071 | int i, t, is_usb_connected; |
1072 | u32 tmp; |
1073 | |
1074 | if (off != 0) |
1075 | return 0; |
1076 | |
1077 | local_irq_save(flags); |
1078 | |
1079 | /* basic device status */ |
1080 | tmp = readl(®s->power_detect); |
1081 | is_usb_connected = tmp & PW_DETECT; |
1082 | t = scnprintf(next, size, |
1083 | "%s - %s\n" |
1084 | "%s version: %s %s\n" |
1085 | "Gadget driver: %s\n" |
1086 | "Host %s, %s\n" |
1087 | "\n", |
1088 | pci_name(dev->pdev), driver_desc, |
1089 | driver_name, DRIVER_VERSION, dmastr(), |
1090 | dev->driver ? dev->driver->driver.name : "(none)", |
1091 | is_usb_connected |
1092 | ? ((tmp & PW_PULLUP) ? "full speed" : "powered") |
1093 | : "disconnected", |
1094 | ({char *state; |
1095 | switch(dev->ep0state){ |
1096 | case EP0_DISCONNECT: state = "ep0_disconnect"; break; |
1097 | case EP0_IDLE: state = "ep0_idle"; break; |
1098 | case EP0_IN: state = "ep0_in"; break; |
1099 | case EP0_OUT: state = "ep0_out"; break; |
1100 | case EP0_STATUS: state = "ep0_status"; break; |
1101 | case EP0_STALL: state = "ep0_stall"; break; |
1102 | case EP0_SUSPEND: state = "ep0_suspend"; break; |
1103 | default: state = "ep0_?"; break; |
1104 | } state; }) |
1105 | ); |
1106 | size -= t; |
1107 | next += t; |
1108 | |
1109 | dump_intmask("int_status", readl(®s->int_status), &next, &size); |
1110 | dump_intmask("int_enable", readl(®s->int_enable), &next, &size); |
1111 | |
1112 | if (!is_usb_connected || !dev->driver || (tmp & PW_PULLUP) == 0) |
1113 | goto done; |
1114 | |
1115 | /* registers for (active) device and ep0 */ |
1116 | t = scnprintf(next, size, "\nirqs %lu\ndataset %02x " |
1117 | "single.bcs %02x.%02x state %x addr %u\n", |
1118 | dev->irqs, readl(®s->DataSet), |
1119 | readl(®s->EPxSingle), readl(®s->EPxBCS), |
1120 | readl(®s->UsbState), |
1121 | readl(®s->address)); |
1122 | size -= t; |
1123 | next += t; |
1124 | |
1125 | tmp = readl(®s->dma_master); |
1126 | t = scnprintf(next, size, |
1127 | "dma %03X =" EIGHTBITS "%s %s\n", tmp, |
1128 | (tmp & MST_EOPB_DIS) ? " eopb-" : "", |
1129 | (tmp & MST_EOPB_ENA) ? " eopb+" : "", |
1130 | (tmp & MST_TIMEOUT_DIS) ? " tmo-" : "", |
1131 | (tmp & MST_TIMEOUT_ENA) ? " tmo+" : "", |
1132 | |
1133 | (tmp & MST_RD_EOPB) ? " eopb" : "", |
1134 | (tmp & MST_RD_RESET) ? " in_reset" : "", |
1135 | (tmp & MST_WR_RESET) ? " out_reset" : "", |
1136 | (tmp & MST_RD_ENA) ? " IN" : "", |
1137 | |
1138 | (tmp & MST_WR_ENA) ? " OUT" : "", |
1139 | (tmp & MST_CONNECTION) |
1140 | ? "ep1in/ep2out" |
1141 | : "ep1out/ep2in"); |
1142 | size -= t; |
1143 | next += t; |
1144 | |
1145 | /* dump endpoint queues */ |
1146 | for (i = 0; i < 4; i++) { |
1147 | struct goku_ep *ep = &dev->ep [i]; |
1148 | struct goku_request *req; |
1149 | |
1150 | if (i && !ep->desc) |
1151 | continue; |
1152 | |
1153 | tmp = readl(ep->reg_status); |
1154 | t = scnprintf(next, size, |
1155 | "%s %s max %u %s, irqs %lu, " |
1156 | "status %02x (%s) " FOURBITS "\n", |
1157 | ep->ep.name, |
1158 | ep->is_in ? "in" : "out", |
1159 | ep->ep.maxpacket, |
1160 | ep->dma ? "dma" : "pio", |
1161 | ep->irqs, |
1162 | tmp, ({ char *s; |
1163 | switch (tmp & EPxSTATUS_EP_MASK) { |
1164 | case EPxSTATUS_EP_READY: |
1165 | s = "ready"; break; |
1166 | case EPxSTATUS_EP_DATAIN: |
1167 | s = "packet"; break; |
1168 | case EPxSTATUS_EP_FULL: |
1169 | s = "full"; break; |
1170 | case EPxSTATUS_EP_TX_ERR: // host will retry |
1171 | s = "tx_err"; break; |
1172 | case EPxSTATUS_EP_RX_ERR: |
1173 | s = "rx_err"; break; |
1174 | case EPxSTATUS_EP_BUSY: /* ep0 only */ |
1175 | s = "busy"; break; |
1176 | case EPxSTATUS_EP_STALL: |
1177 | s = "stall"; break; |
1178 | case EPxSTATUS_EP_INVALID: // these "can't happen" |
1179 | s = "invalid"; break; |
1180 | default: |
1181 | s = "?"; break; |
1182 | }; s; }), |
1183 | (tmp & EPxSTATUS_TOGGLE) ? "data1" : "data0", |
1184 | (tmp & EPxSTATUS_SUSPEND) ? " suspend" : "", |
1185 | (tmp & EPxSTATUS_FIFO_DISABLE) ? " disable" : "", |
1186 | (tmp & EPxSTATUS_STAGE_ERROR) ? " ep0stat" : "" |
1187 | ); |
1188 | if (t <= 0 || t > size) |
1189 | goto done; |
1190 | size -= t; |
1191 | next += t; |
1192 | |
1193 | if (list_empty(&ep->queue)) { |
1194 | t = scnprintf(next, size, "\t(nothing queued)\n"); |
1195 | if (t <= 0 || t > size) |
1196 | goto done; |
1197 | size -= t; |
1198 | next += t; |
1199 | continue; |
1200 | } |
1201 | list_for_each_entry(req, &ep->queue, queue) { |
1202 | if (ep->dma && req->queue.prev == &ep->queue) { |
1203 | if (i == UDC_MSTRD_ENDPOINT) |
1204 | tmp = readl(®s->in_dma_current); |
1205 | else |
1206 | tmp = readl(®s->out_dma_current); |
1207 | tmp -= req->req.dma; |
1208 | tmp++; |
1209 | } else |
1210 | tmp = req->req.actual; |
1211 | |
1212 | t = scnprintf(next, size, |
1213 | "\treq %p len %u/%u buf %p\n", |
1214 | &req->req, tmp, req->req.length, |
1215 | req->req.buf); |
1216 | if (t <= 0 || t > size) |
1217 | goto done; |
1218 | size -= t; |
1219 | next += t; |
1220 | } |
1221 | } |
1222 | |
1223 | done: |
1224 | local_irq_restore(flags); |
1225 | *eof = 1; |
1226 | return count - size; |
1227 | } |
1228 | |
1229 | #endif /* CONFIG_USB_GADGET_DEBUG_FILES */ |
1230 | |
1231 | /*-------------------------------------------------------------------------*/ |
1232 | |
1233 | static void udc_reinit (struct goku_udc *dev) |
1234 | { |
1235 | static char *names [] = { "ep0", "ep1-bulk", "ep2-bulk", "ep3-bulk" }; |
1236 | |
1237 | unsigned i; |
1238 | |
1239 | INIT_LIST_HEAD (&dev->gadget.ep_list); |
1240 | dev->gadget.ep0 = &dev->ep [0].ep; |
1241 | dev->gadget.speed = USB_SPEED_UNKNOWN; |
1242 | dev->ep0state = EP0_DISCONNECT; |
1243 | dev->irqs = 0; |
1244 | |
1245 | for (i = 0; i < 4; i++) { |
1246 | struct goku_ep *ep = &dev->ep[i]; |
1247 | |
1248 | ep->num = i; |
1249 | ep->ep.name = names[i]; |
1250 | ep->reg_fifo = &dev->regs->ep_fifo [i]; |
1251 | ep->reg_status = &dev->regs->ep_status [i]; |
1252 | ep->reg_mode = &dev->regs->ep_mode[i]; |
1253 | |
1254 | ep->ep.ops = &goku_ep_ops; |
1255 | list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list); |
1256 | ep->dev = dev; |
1257 | INIT_LIST_HEAD (&ep->queue); |
1258 | |
1259 | ep_reset(NULL, ep); |
1260 | } |
1261 | |
1262 | dev->ep[0].reg_mode = NULL; |
1263 | dev->ep[0].ep.maxpacket = MAX_EP0_SIZE; |
1264 | list_del_init (&dev->ep[0].ep.ep_list); |
1265 | } |
1266 | |
1267 | static void udc_reset(struct goku_udc *dev) |
1268 | { |
1269 | struct goku_udc_regs __iomem *regs = dev->regs; |
1270 | |
1271 | writel(0, ®s->power_detect); |
1272 | writel(0, ®s->int_enable); |
1273 | readl(®s->int_enable); |
1274 | dev->int_enable = 0; |
1275 | |
1276 | /* deassert reset, leave USB D+ at hi-Z (no pullup) |
1277 | * don't let INT_PWRDETECT sequence begin |
1278 | */ |
1279 | udelay(250); |
1280 | writel(PW_RESETB, ®s->power_detect); |
1281 | readl(®s->int_enable); |
1282 | } |
1283 | |
1284 | static void ep0_start(struct goku_udc *dev) |
1285 | { |
1286 | struct goku_udc_regs __iomem *regs = dev->regs; |
1287 | unsigned i; |
1288 | |
1289 | VDBG(dev, "%s\n", __func__); |
1290 | |
1291 | udc_reset(dev); |
1292 | udc_reinit (dev); |
1293 | //writel(MST_EOPB_ENA | MST_TIMEOUT_ENA, ®s->dma_master); |
1294 | |
1295 | /* hw handles set_address, set_feature, get_status; maybe more */ |
1296 | writel( G_REQMODE_SET_INTF | G_REQMODE_GET_INTF |
1297 | | G_REQMODE_SET_CONF | G_REQMODE_GET_CONF |
1298 | | G_REQMODE_GET_DESC |
1299 | | G_REQMODE_CLEAR_FEAT |
1300 | , ®s->reqmode); |
1301 | |
1302 | for (i = 0; i < 4; i++) |
1303 | dev->ep[i].irqs = 0; |
1304 | |
1305 | /* can't modify descriptors after writing UsbReady */ |
1306 | for (i = 0; i < DESC_LEN; i++) |
1307 | writel(0, ®s->descriptors[i]); |
1308 | writel(0, ®s->UsbReady); |
1309 | |
1310 | /* expect ep0 requests when the host drops reset */ |
1311 | writel(PW_RESETB | PW_PULLUP, ®s->power_detect); |
1312 | dev->int_enable = INT_DEVWIDE | INT_EP0; |
1313 | writel(dev->int_enable, &dev->regs->int_enable); |
1314 | readl(®s->int_enable); |
1315 | dev->gadget.speed = USB_SPEED_FULL; |
1316 | dev->ep0state = EP0_IDLE; |
1317 | } |
1318 | |
1319 | static void udc_enable(struct goku_udc *dev) |
1320 | { |
1321 | /* start enumeration now, or after power detect irq */ |
1322 | if (readl(&dev->regs->power_detect) & PW_DETECT) |
1323 | ep0_start(dev); |
1324 | else { |
1325 | DBG(dev, "%s\n", __func__); |
1326 | dev->int_enable = INT_PWRDETECT; |
1327 | writel(dev->int_enable, &dev->regs->int_enable); |
1328 | } |
1329 | } |
1330 | |
1331 | /*-------------------------------------------------------------------------*/ |
1332 | |
1333 | /* keeping it simple: |
1334 | * - one bus driver, initted first; |
1335 | * - one function driver, initted second |
1336 | */ |
1337 | |
1338 | static struct goku_udc *the_controller; |
1339 | |
1340 | /* when a driver is successfully registered, it will receive |
1341 | * control requests including set_configuration(), which enables |
1342 | * non-control requests. then usb traffic follows until a |
1343 | * disconnect is reported. then a host may connect again, or |
1344 | * the driver might get unbound. |
1345 | */ |
1346 | int usb_gadget_probe_driver(struct usb_gadget_driver *driver, |
1347 | int (*bind)(struct usb_gadget *)) |
1348 | { |
1349 | struct goku_udc *dev = the_controller; |
1350 | int retval; |
1351 | |
1352 | if (!driver |
1353 | || driver->speed < USB_SPEED_FULL |
1354 | || !bind |
1355 | || !driver->disconnect |
1356 | || !driver->setup) |
1357 | return -EINVAL; |
1358 | if (!dev) |
1359 | return -ENODEV; |
1360 | if (dev->driver) |
1361 | return -EBUSY; |
1362 | |
1363 | /* hook up the driver */ |
1364 | driver->driver.bus = NULL; |
1365 | dev->driver = driver; |
1366 | dev->gadget.dev.driver = &driver->driver; |
1367 | retval = bind(&dev->gadget); |
1368 | if (retval) { |
1369 | DBG(dev, "bind to driver %s --> error %d\n", |
1370 | driver->driver.name, retval); |
1371 | dev->driver = NULL; |
1372 | dev->gadget.dev.driver = NULL; |
1373 | return retval; |
1374 | } |
1375 | |
1376 | /* then enable host detection and ep0; and we're ready |
1377 | * for set_configuration as well as eventual disconnect. |
1378 | */ |
1379 | udc_enable(dev); |
1380 | |
1381 | DBG(dev, "registered gadget driver '%s'\n", driver->driver.name); |
1382 | return 0; |
1383 | } |
1384 | EXPORT_SYMBOL(usb_gadget_probe_driver); |
1385 | |
1386 | static void |
1387 | stop_activity(struct goku_udc *dev, struct usb_gadget_driver *driver) |
1388 | { |
1389 | unsigned i; |
1390 | |
1391 | DBG (dev, "%s\n", __func__); |
1392 | |
1393 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) |
1394 | driver = NULL; |
1395 | |
1396 | /* disconnect gadget driver after quiesceing hw and the driver */ |
1397 | udc_reset (dev); |
1398 | for (i = 0; i < 4; i++) |
1399 | nuke(&dev->ep [i], -ESHUTDOWN); |
1400 | if (driver) { |
1401 | spin_unlock(&dev->lock); |
1402 | driver->disconnect(&dev->gadget); |
1403 | spin_lock(&dev->lock); |
1404 | } |
1405 | |
1406 | if (dev->driver) |
1407 | udc_enable(dev); |
1408 | } |
1409 | |
1410 | int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) |
1411 | { |
1412 | struct goku_udc *dev = the_controller; |
1413 | unsigned long flags; |
1414 | |
1415 | if (!dev) |
1416 | return -ENODEV; |
1417 | if (!driver || driver != dev->driver || !driver->unbind) |
1418 | return -EINVAL; |
1419 | |
1420 | spin_lock_irqsave(&dev->lock, flags); |
1421 | dev->driver = NULL; |
1422 | stop_activity(dev, driver); |
1423 | spin_unlock_irqrestore(&dev->lock, flags); |
1424 | |
1425 | driver->unbind(&dev->gadget); |
1426 | dev->gadget.dev.driver = NULL; |
1427 | |
1428 | DBG(dev, "unregistered driver '%s'\n", driver->driver.name); |
1429 | return 0; |
1430 | } |
1431 | EXPORT_SYMBOL(usb_gadget_unregister_driver); |
1432 | |
1433 | |
1434 | /*-------------------------------------------------------------------------*/ |
1435 | |
1436 | static void ep0_setup(struct goku_udc *dev) |
1437 | { |
1438 | struct goku_udc_regs __iomem *regs = dev->regs; |
1439 | struct usb_ctrlrequest ctrl; |
1440 | int tmp; |
1441 | |
1442 | /* read SETUP packet and enter DATA stage */ |
1443 | ctrl.bRequestType = readl(®s->bRequestType); |
1444 | ctrl.bRequest = readl(®s->bRequest); |
1445 | ctrl.wValue = cpu_to_le16((readl(®s->wValueH) << 8) |
1446 | | readl(®s->wValueL)); |
1447 | ctrl.wIndex = cpu_to_le16((readl(®s->wIndexH) << 8) |
1448 | | readl(®s->wIndexL)); |
1449 | ctrl.wLength = cpu_to_le16((readl(®s->wLengthH) << 8) |
1450 | | readl(®s->wLengthL)); |
1451 | writel(0, ®s->SetupRecv); |
1452 | |
1453 | nuke(&dev->ep[0], 0); |
1454 | dev->ep[0].stopped = 0; |
1455 | if (likely(ctrl.bRequestType & USB_DIR_IN)) { |
1456 | dev->ep[0].is_in = 1; |
1457 | dev->ep0state = EP0_IN; |
1458 | /* detect early status stages */ |
1459 | writel(ICONTROL_STATUSNAK, &dev->regs->IntControl); |
1460 | } else { |
1461 | dev->ep[0].is_in = 0; |
1462 | dev->ep0state = EP0_OUT; |
1463 | |
1464 | /* NOTE: CLEAR_FEATURE is done in software so that we can |
1465 | * synchronize transfer restarts after bulk IN stalls. data |
1466 | * won't even enter the fifo until the halt is cleared. |
1467 | */ |
1468 | switch (ctrl.bRequest) { |
1469 | case USB_REQ_CLEAR_FEATURE: |
1470 | switch (ctrl.bRequestType) { |
1471 | case USB_RECIP_ENDPOINT: |
1472 | tmp = le16_to_cpu(ctrl.wIndex) & 0x0f; |
1473 | /* active endpoint */ |
1474 | if (tmp > 3 || (!dev->ep[tmp].desc && tmp != 0)) |
1475 | goto stall; |
1476 | if (ctrl.wIndex & cpu_to_le16( |
1477 | USB_DIR_IN)) { |
1478 | if (!dev->ep[tmp].is_in) |
1479 | goto stall; |
1480 | } else { |
1481 | if (dev->ep[tmp].is_in) |
1482 | goto stall; |
1483 | } |
1484 | if (ctrl.wValue != cpu_to_le16( |
1485 | USB_ENDPOINT_HALT)) |
1486 | goto stall; |
1487 | if (tmp) |
1488 | goku_clear_halt(&dev->ep[tmp]); |
1489 | succeed: |
1490 | /* start ep0out status stage */ |
1491 | writel(~(1<<0), ®s->EOP); |
1492 | dev->ep[0].stopped = 1; |
1493 | dev->ep0state = EP0_STATUS; |
1494 | return; |
1495 | case USB_RECIP_DEVICE: |
1496 | /* device remote wakeup: always clear */ |
1497 | if (ctrl.wValue != cpu_to_le16(1)) |
1498 | goto stall; |
1499 | VDBG(dev, "clear dev remote wakeup\n"); |
1500 | goto succeed; |
1501 | case USB_RECIP_INTERFACE: |
1502 | goto stall; |
1503 | default: /* pass to gadget driver */ |
1504 | break; |
1505 | } |
1506 | break; |
1507 | default: |
1508 | break; |
1509 | } |
1510 | } |
1511 | |
1512 | #ifdef USB_TRACE |
1513 | VDBG(dev, "SETUP %02x.%02x v%04x i%04x l%04x\n", |
1514 | ctrl.bRequestType, ctrl.bRequest, |
1515 | le16_to_cpu(ctrl.wValue), le16_to_cpu(ctrl.wIndex), |
1516 | le16_to_cpu(ctrl.wLength)); |
1517 | #endif |
1518 | |
1519 | /* hw wants to know when we're configured (or not) */ |
1520 | dev->req_config = (ctrl.bRequest == USB_REQ_SET_CONFIGURATION |
1521 | && ctrl.bRequestType == USB_RECIP_DEVICE); |
1522 | if (unlikely(dev->req_config)) |
1523 | dev->configured = (ctrl.wValue != cpu_to_le16(0)); |
1524 | |
1525 | /* delegate everything to the gadget driver. |
1526 | * it may respond after this irq handler returns. |
1527 | */ |
1528 | spin_unlock (&dev->lock); |
1529 | tmp = dev->driver->setup(&dev->gadget, &ctrl); |
1530 | spin_lock (&dev->lock); |
1531 | if (unlikely(tmp < 0)) { |
1532 | stall: |
1533 | #ifdef USB_TRACE |
1534 | VDBG(dev, "req %02x.%02x protocol STALL; err %d\n", |
1535 | ctrl.bRequestType, ctrl.bRequest, tmp); |
1536 | #endif |
1537 | command(regs, COMMAND_STALL, 0); |
1538 | dev->ep[0].stopped = 1; |
1539 | dev->ep0state = EP0_STALL; |
1540 | } |
1541 | |
1542 | /* expect at least one data or status stage irq */ |
1543 | } |
1544 | |
1545 | #define ACK(irqbit) { \ |
1546 | stat &= ~irqbit; \ |
1547 | writel(~irqbit, ®s->int_status); \ |
1548 | handled = 1; \ |
1549 | } |
1550 | |
1551 | static irqreturn_t goku_irq(int irq, void *_dev) |
1552 | { |
1553 | struct goku_udc *dev = _dev; |
1554 | struct goku_udc_regs __iomem *regs = dev->regs; |
1555 | struct goku_ep *ep; |
1556 | u32 stat, handled = 0; |
1557 | unsigned i, rescans = 5; |
1558 | |
1559 | spin_lock(&dev->lock); |
1560 | |
1561 | rescan: |
1562 | stat = readl(®s->int_status) & dev->int_enable; |
1563 | if (!stat) |
1564 | goto done; |
1565 | dev->irqs++; |
1566 | |
1567 | /* device-wide irqs */ |
1568 | if (unlikely(stat & INT_DEVWIDE)) { |
1569 | if (stat & INT_SYSERROR) { |
1570 | ERROR(dev, "system error\n"); |
1571 | stop_activity(dev, dev->driver); |
1572 | stat = 0; |
1573 | handled = 1; |
1574 | // FIXME have a neater way to prevent re-enumeration |
1575 | dev->driver = NULL; |
1576 | goto done; |
1577 | } |
1578 | if (stat & INT_PWRDETECT) { |
1579 | writel(~stat, ®s->int_status); |
1580 | if (readl(&dev->regs->power_detect) & PW_DETECT) { |
1581 | VDBG(dev, "connect\n"); |
1582 | ep0_start(dev); |
1583 | } else { |
1584 | DBG(dev, "disconnect\n"); |
1585 | if (dev->gadget.speed == USB_SPEED_FULL) |
1586 | stop_activity(dev, dev->driver); |
1587 | dev->ep0state = EP0_DISCONNECT; |
1588 | dev->int_enable = INT_DEVWIDE; |
1589 | writel(dev->int_enable, &dev->regs->int_enable); |
1590 | } |
1591 | stat = 0; |
1592 | handled = 1; |
1593 | goto done; |
1594 | } |
1595 | if (stat & INT_SUSPEND) { |
1596 | ACK(INT_SUSPEND); |
1597 | if (readl(®s->ep_status[0]) & EPxSTATUS_SUSPEND) { |
1598 | switch (dev->ep0state) { |
1599 | case EP0_DISCONNECT: |
1600 | case EP0_SUSPEND: |
1601 | goto pm_next; |
1602 | default: |
1603 | break; |
1604 | } |
1605 | DBG(dev, "USB suspend\n"); |
1606 | dev->ep0state = EP0_SUSPEND; |
1607 | if (dev->gadget.speed != USB_SPEED_UNKNOWN |
1608 | && dev->driver |
1609 | && dev->driver->suspend) { |
1610 | spin_unlock(&dev->lock); |
1611 | dev->driver->suspend(&dev->gadget); |
1612 | spin_lock(&dev->lock); |
1613 | } |
1614 | } else { |
1615 | if (dev->ep0state != EP0_SUSPEND) { |
1616 | DBG(dev, "bogus USB resume %d\n", |
1617 | dev->ep0state); |
1618 | goto pm_next; |
1619 | } |
1620 | DBG(dev, "USB resume\n"); |
1621 | dev->ep0state = EP0_IDLE; |
1622 | if (dev->gadget.speed != USB_SPEED_UNKNOWN |
1623 | && dev->driver |
1624 | && dev->driver->resume) { |
1625 | spin_unlock(&dev->lock); |
1626 | dev->driver->resume(&dev->gadget); |
1627 | spin_lock(&dev->lock); |
1628 | } |
1629 | } |
1630 | } |
1631 | pm_next: |
1632 | if (stat & INT_USBRESET) { /* hub reset done */ |
1633 | ACK(INT_USBRESET); |
1634 | INFO(dev, "USB reset done, gadget %s\n", |
1635 | dev->driver->driver.name); |
1636 | } |
1637 | // and INT_ERR on some endpoint's crc/bitstuff/... problem |
1638 | } |
1639 | |
1640 | /* progress ep0 setup, data, or status stages. |
1641 | * no transition {EP0_STATUS, EP0_STALL} --> EP0_IDLE; saves irqs |
1642 | */ |
1643 | if (stat & INT_SETUP) { |
1644 | ACK(INT_SETUP); |
1645 | dev->ep[0].irqs++; |
1646 | ep0_setup(dev); |
1647 | } |
1648 | if (stat & INT_STATUSNAK) { |
1649 | ACK(INT_STATUSNAK|INT_ENDPOINT0); |
1650 | if (dev->ep0state == EP0_IN) { |
1651 | ep = &dev->ep[0]; |
1652 | ep->irqs++; |
1653 | nuke(ep, 0); |
1654 | writel(~(1<<0), ®s->EOP); |
1655 | dev->ep0state = EP0_STATUS; |
1656 | } |
1657 | } |
1658 | if (stat & INT_ENDPOINT0) { |
1659 | ACK(INT_ENDPOINT0); |
1660 | ep = &dev->ep[0]; |
1661 | ep->irqs++; |
1662 | pio_advance(ep); |
1663 | } |
1664 | |
1665 | /* dma completion */ |
1666 | if (stat & INT_MSTRDEND) { /* IN */ |
1667 | ACK(INT_MSTRDEND); |
1668 | ep = &dev->ep[UDC_MSTRD_ENDPOINT]; |
1669 | ep->irqs++; |
1670 | dma_advance(dev, ep); |
1671 | } |
1672 | if (stat & INT_MSTWREND) { /* OUT */ |
1673 | ACK(INT_MSTWREND); |
1674 | ep = &dev->ep[UDC_MSTWR_ENDPOINT]; |
1675 | ep->irqs++; |
1676 | dma_advance(dev, ep); |
1677 | } |
1678 | if (stat & INT_MSTWRTMOUT) { /* OUT */ |
1679 | ACK(INT_MSTWRTMOUT); |
1680 | ep = &dev->ep[UDC_MSTWR_ENDPOINT]; |
1681 | ep->irqs++; |
1682 | ERROR(dev, "%s write timeout ?\n", ep->ep.name); |
1683 | // reset dma? then dma_advance() |
1684 | } |
1685 | |
1686 | /* pio */ |
1687 | for (i = 1; i < 4; i++) { |
1688 | u32 tmp = INT_EPxDATASET(i); |
1689 | |
1690 | if (!(stat & tmp)) |
1691 | continue; |
1692 | ep = &dev->ep[i]; |
1693 | pio_advance(ep); |
1694 | if (list_empty (&ep->queue)) |
1695 | pio_irq_disable(dev, regs, i); |
1696 | stat &= ~tmp; |
1697 | handled = 1; |
1698 | ep->irqs++; |
1699 | } |
1700 | |
1701 | if (rescans--) |
1702 | goto rescan; |
1703 | |
1704 | done: |
1705 | (void)readl(®s->int_enable); |
1706 | spin_unlock(&dev->lock); |
1707 | if (stat) |
1708 | DBG(dev, "unhandled irq status: %05x (%05x, %05x)\n", stat, |
1709 | readl(®s->int_status), dev->int_enable); |
1710 | return IRQ_RETVAL(handled); |
1711 | } |
1712 | |
1713 | #undef ACK |
1714 | |
1715 | /*-------------------------------------------------------------------------*/ |
1716 | |
1717 | static void gadget_release(struct device *_dev) |
1718 | { |
1719 | struct goku_udc *dev = dev_get_drvdata(_dev); |
1720 | |
1721 | kfree(dev); |
1722 | } |
1723 | |
1724 | /* tear down the binding between this driver and the pci device */ |
1725 | |
1726 | static void goku_remove(struct pci_dev *pdev) |
1727 | { |
1728 | struct goku_udc *dev = pci_get_drvdata(pdev); |
1729 | |
1730 | DBG(dev, "%s\n", __func__); |
1731 | |
1732 | BUG_ON(dev->driver); |
1733 | |
1734 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES |
1735 | remove_proc_entry(proc_node_name, NULL); |
1736 | #endif |
1737 | if (dev->regs) |
1738 | udc_reset(dev); |
1739 | if (dev->got_irq) |
1740 | free_irq(pdev->irq, dev); |
1741 | if (dev->regs) |
1742 | iounmap(dev->regs); |
1743 | if (dev->got_region) |
1744 | release_mem_region(pci_resource_start (pdev, 0), |
1745 | pci_resource_len (pdev, 0)); |
1746 | if (dev->enabled) |
1747 | pci_disable_device(pdev); |
1748 | if (dev->registered) |
1749 | device_unregister(&dev->gadget.dev); |
1750 | |
1751 | pci_set_drvdata(pdev, NULL); |
1752 | dev->regs = NULL; |
1753 | the_controller = NULL; |
1754 | |
1755 | INFO(dev, "unbind\n"); |
1756 | } |
1757 | |
1758 | /* wrap this driver around the specified pci device, but |
1759 | * don't respond over USB until a gadget driver binds to us. |
1760 | */ |
1761 | |
1762 | static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
1763 | { |
1764 | struct goku_udc *dev = NULL; |
1765 | unsigned long resource, len; |
1766 | void __iomem *base = NULL; |
1767 | int retval; |
1768 | |
1769 | /* if you want to support more than one controller in a system, |
1770 | * usb_gadget_driver_{register,unregister}() must change. |
1771 | */ |
1772 | if (the_controller) { |
1773 | pr_warning("ignoring %s\n", pci_name(pdev)); |
1774 | return -EBUSY; |
1775 | } |
1776 | if (!pdev->irq) { |
1777 | printk(KERN_ERR "Check PCI %s IRQ setup!\n", pci_name(pdev)); |
1778 | retval = -ENODEV; |
1779 | goto err; |
1780 | } |
1781 | |
1782 | /* alloc, and start init */ |
1783 | dev = kzalloc (sizeof *dev, GFP_KERNEL); |
1784 | if (dev == NULL){ |
1785 | pr_debug("enomem %s\n", pci_name(pdev)); |
1786 | retval = -ENOMEM; |
1787 | goto err; |
1788 | } |
1789 | |
1790 | spin_lock_init(&dev->lock); |
1791 | dev->pdev = pdev; |
1792 | dev->gadget.ops = &goku_ops; |
1793 | |
1794 | /* the "gadget" abstracts/virtualizes the controller */ |
1795 | dev_set_name(&dev->gadget.dev, "gadget"); |
1796 | dev->gadget.dev.parent = &pdev->dev; |
1797 | dev->gadget.dev.dma_mask = pdev->dev.dma_mask; |
1798 | dev->gadget.dev.release = gadget_release; |
1799 | dev->gadget.name = driver_name; |
1800 | |
1801 | /* now all the pci goodies ... */ |
1802 | retval = pci_enable_device(pdev); |
1803 | if (retval < 0) { |
1804 | DBG(dev, "can't enable, %d\n", retval); |
1805 | goto err; |
1806 | } |
1807 | dev->enabled = 1; |
1808 | |
1809 | resource = pci_resource_start(pdev, 0); |
1810 | len = pci_resource_len(pdev, 0); |
1811 | if (!request_mem_region(resource, len, driver_name)) { |
1812 | DBG(dev, "controller already in use\n"); |
1813 | retval = -EBUSY; |
1814 | goto err; |
1815 | } |
1816 | dev->got_region = 1; |
1817 | |
1818 | base = ioremap_nocache(resource, len); |
1819 | if (base == NULL) { |
1820 | DBG(dev, "can't map memory\n"); |
1821 | retval = -EFAULT; |
1822 | goto err; |
1823 | } |
1824 | dev->regs = (struct goku_udc_regs __iomem *) base; |
1825 | |
1826 | pci_set_drvdata(pdev, dev); |
1827 | INFO(dev, "%s\n", driver_desc); |
1828 | INFO(dev, "version: " DRIVER_VERSION " %s\n", dmastr()); |
1829 | INFO(dev, "irq %d, pci mem %p\n", pdev->irq, base); |
1830 | |
1831 | /* init to known state, then setup irqs */ |
1832 | udc_reset(dev); |
1833 | udc_reinit (dev); |
1834 | if (request_irq(pdev->irq, goku_irq, IRQF_SHARED/*|IRQF_SAMPLE_RANDOM*/, |
1835 | driver_name, dev) != 0) { |
1836 | DBG(dev, "request interrupt %d failed\n", pdev->irq); |
1837 | retval = -EBUSY; |
1838 | goto err; |
1839 | } |
1840 | dev->got_irq = 1; |
1841 | if (use_dma) |
1842 | pci_set_master(pdev); |
1843 | |
1844 | |
1845 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES |
1846 | create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev); |
1847 | #endif |
1848 | |
1849 | the_controller = dev; |
1850 | retval = device_register(&dev->gadget.dev); |
1851 | if (retval) { |
1852 | put_device(&dev->gadget.dev); |
1853 | goto err; |
1854 | } |
1855 | dev->registered = 1; |
1856 | return 0; |
1857 | |
1858 | err: |
1859 | if (dev) |
1860 | goku_remove (pdev); |
1861 | return retval; |
1862 | } |
1863 | |
1864 | |
1865 | /*-------------------------------------------------------------------------*/ |
1866 | |
1867 | static const struct pci_device_id pci_ids[] = { { |
1868 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), |
1869 | .class_mask = ~0, |
1870 | .vendor = 0x102f, /* Toshiba */ |
1871 | .device = 0x0107, /* this UDC */ |
1872 | .subvendor = PCI_ANY_ID, |
1873 | .subdevice = PCI_ANY_ID, |
1874 | |
1875 | }, { /* end: all zeroes */ } |
1876 | }; |
1877 | MODULE_DEVICE_TABLE (pci, pci_ids); |
1878 | |
1879 | static struct pci_driver goku_pci_driver = { |
1880 | .name = (char *) driver_name, |
1881 | .id_table = pci_ids, |
1882 | |
1883 | .probe = goku_probe, |
1884 | .remove = goku_remove, |
1885 | |
1886 | /* FIXME add power management support */ |
1887 | }; |
1888 | |
1889 | static int __init init (void) |
1890 | { |
1891 | return pci_register_driver (&goku_pci_driver); |
1892 | } |
1893 | module_init (init); |
1894 | |
1895 | static void __exit cleanup (void) |
1896 | { |
1897 | pci_unregister_driver (&goku_pci_driver); |
1898 | } |
1899 | module_exit (cleanup); |
1900 |
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Tags:
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v2.6.34-rc5
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