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1da177e4 LT |
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 | ||
1da177e4 LT |
23 | // #define VERBOSE /* extra debug messages (success too) */ |
24 | // #define USB_TRACE /* packet-level success messages */ | |
25 | ||
1da177e4 LT |
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> | |
1da177e4 | 31 | #include <linux/slab.h> |
1da177e4 | 32 | #include <linux/errno.h> |
1da177e4 LT |
33 | #include <linux/timer.h> |
34 | #include <linux/list.h> | |
35 | #include <linux/interrupt.h> | |
36 | #include <linux/proc_fs.h> | |
96c7a22e | 37 | #include <linux/seq_file.h> |
1da177e4 | 38 | #include <linux/device.h> |
5f848137 | 39 | #include <linux/usb/ch9.h> |
9454a57a | 40 | #include <linux/usb/gadget.h> |
268bb0ce | 41 | #include <linux/prefetch.h> |
1da177e4 LT |
42 | |
43 | #include <asm/byteorder.h> | |
44 | #include <asm/io.h> | |
45 | #include <asm/irq.h> | |
1da177e4 LT |
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 | ||
1da177e4 LT |
54 | static const char driver_name [] = "goku_udc"; |
55 | static const char driver_desc [] = DRIVER_DESC; | |
56 | ||
57 | MODULE_AUTHOR("source@mvista.com"); | |
58 | MODULE_DESCRIPTION(DRIVER_DESC); | |
59 | MODULE_LICENSE("GPL"); | |
60 | ||
61 | ||
62 | /* | |
63 | * IN dma behaves ok under testing, though the IN-dma abort paths don't | |
64 | * seem to behave quite as expected. Used by default. | |
65 | * | |
66 | * OUT dma documents design problems handling the common "short packet" | |
988199fe | 67 | * transfer termination policy; it couldn't be enabled by default, even |
1da177e4 LT |
68 | * if the OUT-dma abort problems had a resolution. |
69 | */ | |
70 | static unsigned use_dma = 1; | |
71 | ||
72 | #if 0 | |
73 | //#include <linux/moduleparam.h> | |
74 | /* "modprobe goku_udc use_dma=1" etc | |
75 | * 0 to disable dma | |
76 | * 1 to use IN dma only (normal operation) | |
77 | * 2 to use IN and OUT dma | |
78 | */ | |
79 | module_param(use_dma, uint, S_IRUGO); | |
80 | #endif | |
81 | ||
82 | /*-------------------------------------------------------------------------*/ | |
83 | ||
84 | static void nuke(struct goku_ep *, int status); | |
85 | ||
86 | static inline void | |
87 | command(struct goku_udc_regs __iomem *regs, int command, unsigned epnum) | |
88 | { | |
89 | writel(COMMAND_EP(epnum) | command, ®s->Command); | |
90 | udelay(300); | |
91 | } | |
92 | ||
93 | static int | |
94 | goku_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) | |
95 | { | |
96 | struct goku_udc *dev; | |
97 | struct goku_ep *ep; | |
98 | u32 mode; | |
99 | u16 max; | |
100 | unsigned long flags; | |
101 | ||
102 | ep = container_of(_ep, struct goku_ep, ep); | |
aedaa44d | 103 | if (!_ep || !desc |
1da177e4 LT |
104 | || desc->bDescriptorType != USB_DT_ENDPOINT) |
105 | return -EINVAL; | |
106 | dev = ep->dev; | |
107 | if (ep == &dev->ep[0]) | |
108 | return -EINVAL; | |
109 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
110 | return -ESHUTDOWN; | |
9ab15651 | 111 | if (ep->num != usb_endpoint_num(desc)) |
1da177e4 LT |
112 | return -EINVAL; |
113 | ||
9ab15651 | 114 | switch (usb_endpoint_type(desc)) { |
1da177e4 LT |
115 | case USB_ENDPOINT_XFER_BULK: |
116 | case USB_ENDPOINT_XFER_INT: | |
117 | break; | |
118 | default: | |
119 | return -EINVAL; | |
120 | } | |
121 | ||
122 | if ((readl(ep->reg_status) & EPxSTATUS_EP_MASK) | |
123 | != EPxSTATUS_EP_INVALID) | |
124 | return -EBUSY; | |
125 | ||
126 | /* enabling the no-toggle interrupt mode would need an api hook */ | |
127 | mode = 0; | |
a5abdeaf | 128 | max = get_unaligned_le16(&desc->wMaxPacketSize); |
1da177e4 LT |
129 | switch (max) { |
130 | case 64: mode++; | |
131 | case 32: mode++; | |
132 | case 16: mode++; | |
133 | case 8: mode <<= 3; | |
134 | break; | |
135 | default: | |
136 | return -EINVAL; | |
137 | } | |
138 | mode |= 2 << 1; /* bulk, or intr-with-toggle */ | |
139 | ||
140 | /* ep1/ep2 dma direction is chosen early; it works in the other | |
141 | * direction, with pio. be cautious with out-dma. | |
142 | */ | |
9ab15651 | 143 | ep->is_in = usb_endpoint_dir_in(desc); |
1da177e4 LT |
144 | if (ep->is_in) { |
145 | mode |= 1; | |
146 | ep->dma = (use_dma != 0) && (ep->num == UDC_MSTRD_ENDPOINT); | |
147 | } else { | |
148 | ep->dma = (use_dma == 2) && (ep->num == UDC_MSTWR_ENDPOINT); | |
149 | if (ep->dma) | |
150 | DBG(dev, "%s out-dma hides short packets\n", | |
151 | ep->ep.name); | |
152 | } | |
153 | ||
154 | spin_lock_irqsave(&ep->dev->lock, flags); | |
155 | ||
156 | /* ep1 and ep2 can do double buffering and/or dma */ | |
157 | if (ep->num < 3) { | |
158 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
159 | u32 tmp; | |
160 | ||
161 | /* double buffer except (for now) with pio in */ | |
162 | tmp = ((ep->dma || !ep->is_in) | |
163 | ? 0x10 /* double buffered */ | |
164 | : 0x11 /* single buffer */ | |
165 | ) << ep->num; | |
166 | tmp |= readl(®s->EPxSingle); | |
167 | writel(tmp, ®s->EPxSingle); | |
168 | ||
169 | tmp = (ep->dma ? 0x10/*dma*/ : 0x11/*pio*/) << ep->num; | |
170 | tmp |= readl(®s->EPxBCS); | |
171 | writel(tmp, ®s->EPxBCS); | |
172 | } | |
173 | writel(mode, ep->reg_mode); | |
174 | command(ep->dev->regs, COMMAND_RESET, ep->num); | |
175 | ep->ep.maxpacket = max; | |
176 | ep->stopped = 0; | |
db79d981 | 177 | ep->ep.desc = desc; |
1da177e4 LT |
178 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
179 | ||
180 | DBG(dev, "enable %s %s %s maxpacket %u\n", ep->ep.name, | |
181 | ep->is_in ? "IN" : "OUT", | |
182 | ep->dma ? "dma" : "pio", | |
183 | max); | |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
188 | static void ep_reset(struct goku_udc_regs __iomem *regs, struct goku_ep *ep) | |
189 | { | |
190 | struct goku_udc *dev = ep->dev; | |
191 | ||
192 | if (regs) { | |
193 | command(regs, COMMAND_INVALID, ep->num); | |
194 | if (ep->num) { | |
195 | if (ep->num == UDC_MSTWR_ENDPOINT) | |
196 | dev->int_enable &= ~(INT_MSTWREND | |
197 | |INT_MSTWRTMOUT); | |
198 | else if (ep->num == UDC_MSTRD_ENDPOINT) | |
199 | dev->int_enable &= ~INT_MSTRDEND; | |
200 | dev->int_enable &= ~INT_EPxDATASET (ep->num); | |
201 | } else | |
202 | dev->int_enable &= ~INT_EP0; | |
203 | writel(dev->int_enable, ®s->int_enable); | |
204 | readl(®s->int_enable); | |
205 | if (ep->num < 3) { | |
206 | struct goku_udc_regs __iomem *r = ep->dev->regs; | |
207 | u32 tmp; | |
208 | ||
209 | tmp = readl(&r->EPxSingle); | |
210 | tmp &= ~(0x11 << ep->num); | |
211 | writel(tmp, &r->EPxSingle); | |
212 | ||
213 | tmp = readl(&r->EPxBCS); | |
214 | tmp &= ~(0x11 << ep->num); | |
215 | writel(tmp, &r->EPxBCS); | |
216 | } | |
217 | /* reset dma in case we're still using it */ | |
218 | if (ep->dma) { | |
219 | u32 master; | |
220 | ||
221 | master = readl(®s->dma_master) & MST_RW_BITS; | |
222 | if (ep->num == UDC_MSTWR_ENDPOINT) { | |
223 | master &= ~MST_W_BITS; | |
224 | master |= MST_WR_RESET; | |
225 | } else { | |
226 | master &= ~MST_R_BITS; | |
227 | master |= MST_RD_RESET; | |
228 | } | |
229 | writel(master, ®s->dma_master); | |
230 | } | |
231 | } | |
232 | ||
e117e742 | 233 | usb_ep_set_maxpacket_limit(&ep->ep, MAX_FIFO_SIZE); |
f9c56cdd | 234 | ep->ep.desc = NULL; |
1da177e4 LT |
235 | ep->stopped = 1; |
236 | ep->irqs = 0; | |
237 | ep->dma = 0; | |
238 | } | |
239 | ||
240 | static int goku_ep_disable(struct usb_ep *_ep) | |
241 | { | |
242 | struct goku_ep *ep; | |
243 | struct goku_udc *dev; | |
244 | unsigned long flags; | |
245 | ||
246 | ep = container_of(_ep, struct goku_ep, ep); | |
db79d981 | 247 | if (!_ep || !ep->ep.desc) |
1da177e4 LT |
248 | return -ENODEV; |
249 | dev = ep->dev; | |
250 | if (dev->ep0state == EP0_SUSPEND) | |
251 | return -EBUSY; | |
252 | ||
253 | VDBG(dev, "disable %s\n", _ep->name); | |
254 | ||
255 | spin_lock_irqsave(&dev->lock, flags); | |
256 | nuke(ep, -ESHUTDOWN); | |
257 | ep_reset(dev->regs, ep); | |
258 | spin_unlock_irqrestore(&dev->lock, flags); | |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
263 | /*-------------------------------------------------------------------------*/ | |
264 | ||
265 | static struct usb_request * | |
55016f10 | 266 | goku_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) |
1da177e4 LT |
267 | { |
268 | struct goku_request *req; | |
269 | ||
270 | if (!_ep) | |
271 | return NULL; | |
7039f422 | 272 | req = kzalloc(sizeof *req, gfp_flags); |
1da177e4 LT |
273 | if (!req) |
274 | return NULL; | |
275 | ||
1da177e4 LT |
276 | INIT_LIST_HEAD(&req->queue); |
277 | return &req->req; | |
278 | } | |
279 | ||
280 | static void | |
281 | goku_free_request(struct usb_ep *_ep, struct usb_request *_req) | |
282 | { | |
283 | struct goku_request *req; | |
284 | ||
285 | if (!_ep || !_req) | |
286 | return; | |
287 | ||
288 | req = container_of(_req, struct goku_request, req); | |
289 | WARN_ON(!list_empty(&req->queue)); | |
290 | kfree(req); | |
291 | } | |
292 | ||
293 | /*-------------------------------------------------------------------------*/ | |
294 | ||
1da177e4 LT |
295 | static void |
296 | done(struct goku_ep *ep, struct goku_request *req, int status) | |
297 | { | |
298 | struct goku_udc *dev; | |
299 | unsigned stopped = ep->stopped; | |
300 | ||
301 | list_del_init(&req->queue); | |
302 | ||
303 | if (likely(req->req.status == -EINPROGRESS)) | |
304 | req->req.status = status; | |
305 | else | |
306 | status = req->req.status; | |
307 | ||
308 | dev = ep->dev; | |
6440093f FB |
309 | |
310 | if (ep->dma) | |
311 | usb_gadget_unmap_request(&dev->gadget, &req->req, ep->is_in); | |
1da177e4 LT |
312 | |
313 | #ifndef USB_TRACE | |
314 | if (status && status != -ESHUTDOWN) | |
315 | #endif | |
316 | VDBG(dev, "complete %s req %p stat %d len %u/%u\n", | |
317 | ep->ep.name, &req->req, status, | |
318 | req->req.actual, req->req.length); | |
319 | ||
320 | /* don't modify queue heads during completion callback */ | |
321 | ep->stopped = 1; | |
322 | spin_unlock(&dev->lock); | |
323 | req->req.complete(&ep->ep, &req->req); | |
324 | spin_lock(&dev->lock); | |
325 | ep->stopped = stopped; | |
326 | } | |
327 | ||
328 | /*-------------------------------------------------------------------------*/ | |
329 | ||
330 | static inline int | |
331 | write_packet(u32 __iomem *fifo, u8 *buf, struct goku_request *req, unsigned max) | |
332 | { | |
333 | unsigned length, count; | |
334 | ||
335 | length = min(req->req.length - req->req.actual, max); | |
336 | req->req.actual += length; | |
337 | ||
338 | count = length; | |
339 | while (likely(count--)) | |
340 | writel(*buf++, fifo); | |
341 | return length; | |
342 | } | |
343 | ||
344 | // return: 0 = still running, 1 = completed, negative = errno | |
345 | static int write_fifo(struct goku_ep *ep, struct goku_request *req) | |
346 | { | |
347 | struct goku_udc *dev = ep->dev; | |
348 | u32 tmp; | |
349 | u8 *buf; | |
350 | unsigned count; | |
351 | int is_last; | |
352 | ||
353 | tmp = readl(&dev->regs->DataSet); | |
354 | buf = req->req.buf + req->req.actual; | |
355 | prefetch(buf); | |
356 | ||
357 | dev = ep->dev; | |
358 | if (unlikely(ep->num == 0 && dev->ep0state != EP0_IN)) | |
359 | return -EL2HLT; | |
360 | ||
361 | /* NOTE: just single-buffered PIO-IN for now. */ | |
362 | if (unlikely((tmp & DATASET_A(ep->num)) != 0)) | |
363 | return 0; | |
364 | ||
365 | /* clear our "packet available" irq */ | |
366 | if (ep->num != 0) | |
367 | writel(~INT_EPxDATASET(ep->num), &dev->regs->int_status); | |
368 | ||
369 | count = write_packet(ep->reg_fifo, buf, req, ep->ep.maxpacket); | |
370 | ||
371 | /* last packet often short (sometimes a zlp, especially on ep0) */ | |
372 | if (unlikely(count != ep->ep.maxpacket)) { | |
373 | writel(~(1<<ep->num), &dev->regs->EOP); | |
374 | if (ep->num == 0) { | |
375 | dev->ep[0].stopped = 1; | |
376 | dev->ep0state = EP0_STATUS; | |
377 | } | |
378 | is_last = 1; | |
379 | } else { | |
380 | if (likely(req->req.length != req->req.actual) | |
381 | || req->req.zero) | |
382 | is_last = 0; | |
383 | else | |
384 | is_last = 1; | |
385 | } | |
386 | #if 0 /* printk seemed to trash is_last...*/ | |
387 | //#ifdef USB_TRACE | |
388 | VDBG(dev, "wrote %s %u bytes%s IN %u left %p\n", | |
389 | ep->ep.name, count, is_last ? "/last" : "", | |
390 | req->req.length - req->req.actual, req); | |
391 | #endif | |
392 | ||
393 | /* requests complete when all IN data is in the FIFO, | |
394 | * or sometimes later, if a zlp was needed. | |
395 | */ | |
396 | if (is_last) { | |
397 | done(ep, req, 0); | |
398 | return 1; | |
399 | } | |
400 | ||
401 | return 0; | |
402 | } | |
403 | ||
404 | static int read_fifo(struct goku_ep *ep, struct goku_request *req) | |
405 | { | |
406 | struct goku_udc_regs __iomem *regs; | |
407 | u32 size, set; | |
408 | u8 *buf; | |
409 | unsigned bufferspace, is_short, dbuff; | |
410 | ||
411 | regs = ep->dev->regs; | |
412 | top: | |
413 | buf = req->req.buf + req->req.actual; | |
414 | prefetchw(buf); | |
415 | ||
416 | if (unlikely(ep->num == 0 && ep->dev->ep0state != EP0_OUT)) | |
417 | return -EL2HLT; | |
418 | ||
419 | dbuff = (ep->num == 1 || ep->num == 2); | |
420 | do { | |
421 | /* ack dataset irq matching the status we'll handle */ | |
422 | if (ep->num != 0) | |
423 | writel(~INT_EPxDATASET(ep->num), ®s->int_status); | |
424 | ||
425 | set = readl(®s->DataSet) & DATASET_AB(ep->num); | |
426 | size = readl(®s->EPxSizeLA[ep->num]); | |
427 | bufferspace = req->req.length - req->req.actual; | |
428 | ||
429 | /* usually do nothing without an OUT packet */ | |
430 | if (likely(ep->num != 0 || bufferspace != 0)) { | |
431 | if (unlikely(set == 0)) | |
432 | break; | |
433 | /* use ep1/ep2 double-buffering for OUT */ | |
434 | if (!(size & PACKET_ACTIVE)) | |
435 | size = readl(®s->EPxSizeLB[ep->num]); | |
2d70c99b | 436 | if (!(size & PACKET_ACTIVE)) /* "can't happen" */ |
1da177e4 LT |
437 | break; |
438 | size &= DATASIZE; /* EPxSizeH == 0 */ | |
439 | ||
440 | /* ep0out no-out-data case for set_config, etc */ | |
441 | } else | |
442 | size = 0; | |
443 | ||
444 | /* read all bytes from this packet */ | |
445 | req->req.actual += size; | |
446 | is_short = (size < ep->ep.maxpacket); | |
447 | #ifdef USB_TRACE | |
448 | VDBG(ep->dev, "read %s %u bytes%s OUT req %p %u/%u\n", | |
449 | ep->ep.name, size, is_short ? "/S" : "", | |
450 | req, req->req.actual, req->req.length); | |
451 | #endif | |
452 | while (likely(size-- != 0)) { | |
453 | u8 byte = (u8) readl(ep->reg_fifo); | |
454 | ||
455 | if (unlikely(bufferspace == 0)) { | |
456 | /* this happens when the driver's buffer | |
457 | * is smaller than what the host sent. | |
458 | * discard the extra data in this packet. | |
459 | */ | |
460 | if (req->req.status != -EOVERFLOW) | |
461 | DBG(ep->dev, "%s overflow %u\n", | |
462 | ep->ep.name, size); | |
463 | req->req.status = -EOVERFLOW; | |
464 | } else { | |
465 | *buf++ = byte; | |
466 | bufferspace--; | |
467 | } | |
468 | } | |
469 | ||
470 | /* completion */ | |
471 | if (unlikely(is_short || req->req.actual == req->req.length)) { | |
472 | if (unlikely(ep->num == 0)) { | |
473 | /* non-control endpoints now usable? */ | |
474 | if (ep->dev->req_config) | |
475 | writel(ep->dev->configured | |
476 | ? USBSTATE_CONFIGURED | |
477 | : 0, | |
478 | ®s->UsbState); | |
479 | /* ep0out status stage */ | |
480 | writel(~(1<<0), ®s->EOP); | |
481 | ep->stopped = 1; | |
482 | ep->dev->ep0state = EP0_STATUS; | |
483 | } | |
484 | done(ep, req, 0); | |
485 | ||
486 | /* empty the second buffer asap */ | |
487 | if (dbuff && !list_empty(&ep->queue)) { | |
488 | req = list_entry(ep->queue.next, | |
489 | struct goku_request, queue); | |
490 | goto top; | |
491 | } | |
492 | return 1; | |
493 | } | |
494 | } while (dbuff); | |
495 | return 0; | |
496 | } | |
497 | ||
498 | static inline void | |
499 | pio_irq_enable(struct goku_udc *dev, | |
500 | struct goku_udc_regs __iomem *regs, int epnum) | |
501 | { | |
502 | dev->int_enable |= INT_EPxDATASET (epnum); | |
503 | writel(dev->int_enable, ®s->int_enable); | |
504 | /* write may still be posted */ | |
505 | } | |
506 | ||
507 | static inline void | |
508 | pio_irq_disable(struct goku_udc *dev, | |
509 | struct goku_udc_regs __iomem *regs, int epnum) | |
510 | { | |
511 | dev->int_enable &= ~INT_EPxDATASET (epnum); | |
512 | writel(dev->int_enable, ®s->int_enable); | |
513 | /* write may still be posted */ | |
514 | } | |
515 | ||
516 | static inline void | |
517 | pio_advance(struct goku_ep *ep) | |
518 | { | |
519 | struct goku_request *req; | |
520 | ||
521 | if (unlikely(list_empty (&ep->queue))) | |
522 | return; | |
523 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
524 | (ep->is_in ? write_fifo : read_fifo)(ep, req); | |
525 | } | |
526 | ||
527 | ||
528 | /*-------------------------------------------------------------------------*/ | |
529 | ||
530 | // return: 0 = q running, 1 = q stopped, negative = errno | |
531 | static int start_dma(struct goku_ep *ep, struct goku_request *req) | |
532 | { | |
533 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
534 | u32 master; | |
535 | u32 start = req->req.dma; | |
536 | u32 end = start + req->req.length - 1; | |
537 | ||
538 | master = readl(®s->dma_master) & MST_RW_BITS; | |
539 | ||
540 | /* re-init the bits affecting IN dma; careful with zlps */ | |
541 | if (likely(ep->is_in)) { | |
542 | if (unlikely(master & MST_RD_ENA)) { | |
543 | DBG (ep->dev, "start, IN active dma %03x!!\n", | |
544 | master); | |
545 | // return -EL2HLT; | |
546 | } | |
547 | writel(end, ®s->in_dma_end); | |
548 | writel(start, ®s->in_dma_start); | |
549 | ||
550 | master &= ~MST_R_BITS; | |
551 | if (unlikely(req->req.length == 0)) | |
552 | master = MST_RD_ENA | MST_RD_EOPB; | |
553 | else if ((req->req.length % ep->ep.maxpacket) != 0 | |
554 | || req->req.zero) | |
555 | master = MST_RD_ENA | MST_EOPB_ENA; | |
556 | else | |
557 | master = MST_RD_ENA | MST_EOPB_DIS; | |
558 | ||
559 | ep->dev->int_enable |= INT_MSTRDEND; | |
560 | ||
561 | /* Goku DMA-OUT merges short packets, which plays poorly with | |
562 | * protocols where short packets mark the transfer boundaries. | |
563 | * The chip supports a nonstandard policy with INT_MSTWRTMOUT, | |
564 | * ending transfers after 3 SOFs; we don't turn it on. | |
565 | */ | |
566 | } else { | |
567 | if (unlikely(master & MST_WR_ENA)) { | |
568 | DBG (ep->dev, "start, OUT active dma %03x!!\n", | |
569 | master); | |
570 | // return -EL2HLT; | |
571 | } | |
572 | writel(end, ®s->out_dma_end); | |
573 | writel(start, ®s->out_dma_start); | |
574 | ||
575 | master &= ~MST_W_BITS; | |
576 | master |= MST_WR_ENA | MST_TIMEOUT_DIS; | |
577 | ||
578 | ep->dev->int_enable |= INT_MSTWREND|INT_MSTWRTMOUT; | |
579 | } | |
580 | ||
581 | writel(master, ®s->dma_master); | |
582 | writel(ep->dev->int_enable, ®s->int_enable); | |
583 | return 0; | |
584 | } | |
585 | ||
586 | static void dma_advance(struct goku_udc *dev, struct goku_ep *ep) | |
587 | { | |
588 | struct goku_request *req; | |
589 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
590 | u32 master; | |
591 | ||
592 | master = readl(®s->dma_master); | |
593 | ||
594 | if (unlikely(list_empty(&ep->queue))) { | |
595 | stop: | |
596 | if (ep->is_in) | |
597 | dev->int_enable &= ~INT_MSTRDEND; | |
598 | else | |
599 | dev->int_enable &= ~(INT_MSTWREND|INT_MSTWRTMOUT); | |
600 | writel(dev->int_enable, ®s->int_enable); | |
601 | return; | |
602 | } | |
603 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
604 | ||
605 | /* normal hw dma completion (not abort) */ | |
606 | if (likely(ep->is_in)) { | |
607 | if (unlikely(master & MST_RD_ENA)) | |
608 | return; | |
609 | req->req.actual = readl(®s->in_dma_current); | |
610 | } else { | |
611 | if (unlikely(master & MST_WR_ENA)) | |
612 | return; | |
613 | ||
614 | /* hardware merges short packets, and also hides packet | |
615 | * overruns. a partial packet MAY be in the fifo here. | |
616 | */ | |
617 | req->req.actual = readl(®s->out_dma_current); | |
618 | } | |
619 | req->req.actual -= req->req.dma; | |
620 | req->req.actual++; | |
621 | ||
622 | #ifdef USB_TRACE | |
623 | VDBG(dev, "done %s %s dma, %u/%u bytes, req %p\n", | |
624 | ep->ep.name, ep->is_in ? "IN" : "OUT", | |
625 | req->req.actual, req->req.length, req); | |
626 | #endif | |
627 | done(ep, req, 0); | |
628 | if (list_empty(&ep->queue)) | |
629 | goto stop; | |
630 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
631 | (void) start_dma(ep, req); | |
632 | } | |
633 | ||
634 | static void abort_dma(struct goku_ep *ep, int status) | |
635 | { | |
636 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
637 | struct goku_request *req; | |
638 | u32 curr, master; | |
639 | ||
640 | /* NAK future host requests, hoping the implicit delay lets the | |
641 | * dma engine finish reading (or writing) its latest packet and | |
642 | * empty the dma buffer (up to 16 bytes). | |
643 | * | |
644 | * This avoids needing to clean up a partial packet in the fifo; | |
645 | * we can't do that for IN without side effects to HALT and TOGGLE. | |
646 | */ | |
647 | command(regs, COMMAND_FIFO_DISABLE, ep->num); | |
648 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
649 | master = readl(®s->dma_master) & MST_RW_BITS; | |
650 | ||
651 | /* FIXME using these resets isn't usably documented. this may | |
652 | * not work unless it's followed by disabling the endpoint. | |
653 | * | |
654 | * FIXME the OUT reset path doesn't even behave consistently. | |
655 | */ | |
656 | if (ep->is_in) { | |
657 | if (unlikely((readl(®s->dma_master) & MST_RD_ENA) == 0)) | |
658 | goto finished; | |
659 | curr = readl(®s->in_dma_current); | |
660 | ||
661 | writel(curr, ®s->in_dma_end); | |
662 | writel(curr, ®s->in_dma_start); | |
663 | ||
664 | master &= ~MST_R_BITS; | |
665 | master |= MST_RD_RESET; | |
666 | writel(master, ®s->dma_master); | |
667 | ||
668 | if (readl(®s->dma_master) & MST_RD_ENA) | |
669 | DBG(ep->dev, "IN dma active after reset!\n"); | |
670 | ||
671 | } else { | |
672 | if (unlikely((readl(®s->dma_master) & MST_WR_ENA) == 0)) | |
673 | goto finished; | |
674 | curr = readl(®s->out_dma_current); | |
675 | ||
676 | writel(curr, ®s->out_dma_end); | |
677 | writel(curr, ®s->out_dma_start); | |
678 | ||
679 | master &= ~MST_W_BITS; | |
680 | master |= MST_WR_RESET; | |
681 | writel(master, ®s->dma_master); | |
682 | ||
683 | if (readl(®s->dma_master) & MST_WR_ENA) | |
684 | DBG(ep->dev, "OUT dma active after reset!\n"); | |
685 | } | |
686 | req->req.actual = (curr - req->req.dma) + 1; | |
687 | req->req.status = status; | |
688 | ||
441b62c1 | 689 | VDBG(ep->dev, "%s %s %s %d/%d\n", __func__, ep->ep.name, |
1da177e4 LT |
690 | ep->is_in ? "IN" : "OUT", |
691 | req->req.actual, req->req.length); | |
692 | ||
693 | command(regs, COMMAND_FIFO_ENABLE, ep->num); | |
694 | ||
695 | return; | |
696 | ||
697 | finished: | |
698 | /* dma already completed; no abort needed */ | |
699 | command(regs, COMMAND_FIFO_ENABLE, ep->num); | |
700 | req->req.actual = req->req.length; | |
701 | req->req.status = 0; | |
702 | } | |
703 | ||
704 | /*-------------------------------------------------------------------------*/ | |
705 | ||
706 | static int | |
55016f10 | 707 | goku_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) |
1da177e4 LT |
708 | { |
709 | struct goku_request *req; | |
710 | struct goku_ep *ep; | |
711 | struct goku_udc *dev; | |
712 | unsigned long flags; | |
713 | int status; | |
714 | ||
715 | /* always require a cpu-view buffer so pio works */ | |
716 | req = container_of(_req, struct goku_request, req); | |
717 | if (unlikely(!_req || !_req->complete | |
718 | || !_req->buf || !list_empty(&req->queue))) | |
719 | return -EINVAL; | |
720 | ep = container_of(_ep, struct goku_ep, ep); | |
db79d981 | 721 | if (unlikely(!_ep || (!ep->ep.desc && ep->num != 0))) |
1da177e4 LT |
722 | return -EINVAL; |
723 | dev = ep->dev; | |
724 | if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) | |
725 | return -ESHUTDOWN; | |
726 | ||
727 | /* can't touch registers when suspended */ | |
728 | if (dev->ep0state == EP0_SUSPEND) | |
729 | return -EBUSY; | |
730 | ||
731 | /* set up dma mapping in case the caller didn't */ | |
6440093f FB |
732 | if (ep->dma) { |
733 | status = usb_gadget_map_request(&dev->gadget, &req->req, | |
734 | ep->is_in); | |
735 | if (status) | |
736 | return status; | |
1da177e4 LT |
737 | } |
738 | ||
739 | #ifdef USB_TRACE | |
740 | VDBG(dev, "%s queue req %p, len %u buf %p\n", | |
741 | _ep->name, _req, _req->length, _req->buf); | |
742 | #endif | |
743 | ||
744 | spin_lock_irqsave(&dev->lock, flags); | |
745 | ||
746 | _req->status = -EINPROGRESS; | |
747 | _req->actual = 0; | |
748 | ||
749 | /* for ep0 IN without premature status, zlp is required and | |
750 | * writing EOP starts the status stage (OUT). | |
751 | */ | |
752 | if (unlikely(ep->num == 0 && ep->is_in)) | |
753 | _req->zero = 1; | |
754 | ||
755 | /* kickstart this i/o queue? */ | |
756 | status = 0; | |
757 | if (list_empty(&ep->queue) && likely(!ep->stopped)) { | |
758 | /* dma: done after dma completion IRQ (or error) | |
759 | * pio: done after last fifo operation | |
760 | */ | |
761 | if (ep->dma) | |
762 | status = start_dma(ep, req); | |
763 | else | |
764 | status = (ep->is_in ? write_fifo : read_fifo)(ep, req); | |
765 | ||
766 | if (unlikely(status != 0)) { | |
767 | if (status > 0) | |
768 | status = 0; | |
769 | req = NULL; | |
770 | } | |
771 | ||
772 | } /* else pio or dma irq handler advances the queue. */ | |
773 | ||
027ca0d2 | 774 | if (likely(req != NULL)) |
1da177e4 LT |
775 | list_add_tail(&req->queue, &ep->queue); |
776 | ||
777 | if (likely(!list_empty(&ep->queue)) | |
778 | && likely(ep->num != 0) | |
779 | && !ep->dma | |
780 | && !(dev->int_enable & INT_EPxDATASET (ep->num))) | |
781 | pio_irq_enable(dev, dev->regs, ep->num); | |
782 | ||
783 | spin_unlock_irqrestore(&dev->lock, flags); | |
784 | ||
785 | /* pci writes may still be posted */ | |
786 | return status; | |
787 | } | |
788 | ||
789 | /* dequeue ALL requests */ | |
790 | static void nuke(struct goku_ep *ep, int status) | |
791 | { | |
792 | struct goku_request *req; | |
793 | ||
794 | ep->stopped = 1; | |
795 | if (list_empty(&ep->queue)) | |
796 | return; | |
797 | if (ep->dma) | |
798 | abort_dma(ep, status); | |
799 | while (!list_empty(&ep->queue)) { | |
800 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
801 | done(ep, req, status); | |
802 | } | |
803 | } | |
804 | ||
805 | /* dequeue JUST ONE request */ | |
806 | static int goku_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
807 | { | |
808 | struct goku_request *req; | |
809 | struct goku_ep *ep; | |
810 | struct goku_udc *dev; | |
811 | unsigned long flags; | |
812 | ||
813 | ep = container_of(_ep, struct goku_ep, ep); | |
db79d981 | 814 | if (!_ep || !_req || (!ep->ep.desc && ep->num != 0)) |
1da177e4 LT |
815 | return -EINVAL; |
816 | dev = ep->dev; | |
817 | if (!dev->driver) | |
818 | return -ESHUTDOWN; | |
819 | ||
820 | /* we can't touch (dma) registers when suspended */ | |
821 | if (dev->ep0state == EP0_SUSPEND) | |
822 | return -EBUSY; | |
823 | ||
441b62c1 | 824 | VDBG(dev, "%s %s %s %s %p\n", __func__, _ep->name, |
1da177e4 LT |
825 | ep->is_in ? "IN" : "OUT", |
826 | ep->dma ? "dma" : "pio", | |
827 | _req); | |
828 | ||
829 | spin_lock_irqsave(&dev->lock, flags); | |
830 | ||
831 | /* make sure it's actually queued on this endpoint */ | |
832 | list_for_each_entry (req, &ep->queue, queue) { | |
833 | if (&req->req == _req) | |
834 | break; | |
835 | } | |
836 | if (&req->req != _req) { | |
837 | spin_unlock_irqrestore (&dev->lock, flags); | |
838 | return -EINVAL; | |
839 | } | |
840 | ||
841 | if (ep->dma && ep->queue.next == &req->queue && !ep->stopped) { | |
842 | abort_dma(ep, -ECONNRESET); | |
843 | done(ep, req, -ECONNRESET); | |
844 | dma_advance(dev, ep); | |
845 | } else if (!list_empty(&req->queue)) | |
846 | done(ep, req, -ECONNRESET); | |
847 | else | |
848 | req = NULL; | |
849 | spin_unlock_irqrestore(&dev->lock, flags); | |
850 | ||
851 | return req ? 0 : -EOPNOTSUPP; | |
852 | } | |
853 | ||
854 | /*-------------------------------------------------------------------------*/ | |
855 | ||
856 | static void goku_clear_halt(struct goku_ep *ep) | |
857 | { | |
858 | // assert (ep->num !=0) | |
859 | VDBG(ep->dev, "%s clear halt\n", ep->ep.name); | |
860 | command(ep->dev->regs, COMMAND_SETDATA0, ep->num); | |
861 | command(ep->dev->regs, COMMAND_STALL_CLEAR, ep->num); | |
862 | if (ep->stopped) { | |
863 | ep->stopped = 0; | |
864 | if (ep->dma) { | |
865 | struct goku_request *req; | |
866 | ||
867 | if (list_empty(&ep->queue)) | |
868 | return; | |
869 | req = list_entry(ep->queue.next, struct goku_request, | |
870 | queue); | |
871 | (void) start_dma(ep, req); | |
872 | } else | |
873 | pio_advance(ep); | |
874 | } | |
875 | } | |
876 | ||
877 | static int goku_set_halt(struct usb_ep *_ep, int value) | |
878 | { | |
879 | struct goku_ep *ep; | |
880 | unsigned long flags; | |
881 | int retval = 0; | |
882 | ||
883 | if (!_ep) | |
884 | return -ENODEV; | |
885 | ep = container_of (_ep, struct goku_ep, ep); | |
886 | ||
887 | if (ep->num == 0) { | |
888 | if (value) { | |
889 | ep->dev->ep0state = EP0_STALL; | |
890 | ep->dev->ep[0].stopped = 1; | |
891 | } else | |
892 | return -EINVAL; | |
893 | ||
894 | /* don't change EPxSTATUS_EP_INVALID to READY */ | |
db79d981 | 895 | } else if (!ep->ep.desc) { |
441b62c1 | 896 | DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name); |
1da177e4 LT |
897 | return -EINVAL; |
898 | } | |
899 | ||
900 | spin_lock_irqsave(&ep->dev->lock, flags); | |
901 | if (!list_empty(&ep->queue)) | |
902 | retval = -EAGAIN; | |
903 | else if (ep->is_in && value | |
904 | /* data in (either) packet buffer? */ | |
905 | && (readl(&ep->dev->regs->DataSet) | |
906 | & DATASET_AB(ep->num))) | |
907 | retval = -EAGAIN; | |
908 | else if (!value) | |
909 | goku_clear_halt(ep); | |
910 | else { | |
911 | ep->stopped = 1; | |
912 | VDBG(ep->dev, "%s set halt\n", ep->ep.name); | |
913 | command(ep->dev->regs, COMMAND_STALL, ep->num); | |
914 | readl(ep->reg_status); | |
915 | } | |
916 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
917 | return retval; | |
918 | } | |
919 | ||
920 | static int goku_fifo_status(struct usb_ep *_ep) | |
921 | { | |
922 | struct goku_ep *ep; | |
923 | struct goku_udc_regs __iomem *regs; | |
924 | u32 size; | |
925 | ||
926 | if (!_ep) | |
927 | return -ENODEV; | |
928 | ep = container_of(_ep, struct goku_ep, ep); | |
929 | ||
930 | /* size is only reported sanely for OUT */ | |
931 | if (ep->is_in) | |
932 | return -EOPNOTSUPP; | |
933 | ||
934 | /* ignores 16-byte dma buffer; SizeH == 0 */ | |
935 | regs = ep->dev->regs; | |
936 | size = readl(®s->EPxSizeLA[ep->num]) & DATASIZE; | |
937 | size += readl(®s->EPxSizeLB[ep->num]) & DATASIZE; | |
441b62c1 | 938 | VDBG(ep->dev, "%s %s %u\n", __func__, ep->ep.name, size); |
1da177e4 LT |
939 | return size; |
940 | } | |
941 | ||
942 | static void goku_fifo_flush(struct usb_ep *_ep) | |
943 | { | |
944 | struct goku_ep *ep; | |
945 | struct goku_udc_regs __iomem *regs; | |
946 | u32 size; | |
947 | ||
948 | if (!_ep) | |
949 | return; | |
950 | ep = container_of(_ep, struct goku_ep, ep); | |
441b62c1 | 951 | VDBG(ep->dev, "%s %s\n", __func__, ep->ep.name); |
1da177e4 LT |
952 | |
953 | /* don't change EPxSTATUS_EP_INVALID to READY */ | |
db79d981 | 954 | if (!ep->ep.desc && ep->num != 0) { |
441b62c1 | 955 | DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name); |
1da177e4 LT |
956 | return; |
957 | } | |
958 | ||
959 | regs = ep->dev->regs; | |
960 | size = readl(®s->EPxSizeLA[ep->num]); | |
961 | size &= DATASIZE; | |
962 | ||
963 | /* Non-desirable behavior: FIFO_CLEAR also clears the | |
964 | * endpoint halt feature. For OUT, we _could_ just read | |
965 | * the bytes out (PIO, if !ep->dma); for in, no choice. | |
966 | */ | |
967 | if (size) | |
968 | command(regs, COMMAND_FIFO_CLEAR, ep->num); | |
969 | } | |
970 | ||
971 | static struct usb_ep_ops goku_ep_ops = { | |
972 | .enable = goku_ep_enable, | |
973 | .disable = goku_ep_disable, | |
974 | ||
975 | .alloc_request = goku_alloc_request, | |
976 | .free_request = goku_free_request, | |
977 | ||
1da177e4 LT |
978 | .queue = goku_queue, |
979 | .dequeue = goku_dequeue, | |
980 | ||
981 | .set_halt = goku_set_halt, | |
982 | .fifo_status = goku_fifo_status, | |
983 | .fifo_flush = goku_fifo_flush, | |
984 | }; | |
985 | ||
986 | /*-------------------------------------------------------------------------*/ | |
987 | ||
988 | static int goku_get_frame(struct usb_gadget *_gadget) | |
989 | { | |
990 | return -EOPNOTSUPP; | |
991 | } | |
992 | ||
950b3c1d FB |
993 | static int goku_udc_start(struct usb_gadget *g, |
994 | struct usb_gadget_driver *driver); | |
995 | static int goku_udc_stop(struct usb_gadget *g, | |
996 | struct usb_gadget_driver *driver); | |
0f91349b | 997 | |
1da177e4 LT |
998 | static const struct usb_gadget_ops goku_ops = { |
999 | .get_frame = goku_get_frame, | |
950b3c1d FB |
1000 | .udc_start = goku_udc_start, |
1001 | .udc_stop = goku_udc_stop, | |
1da177e4 LT |
1002 | // no remote wakeup |
1003 | // not selfpowered | |
1004 | }; | |
1005 | ||
1006 | /*-------------------------------------------------------------------------*/ | |
1007 | ||
96c7a22e | 1008 | static inline const char *dmastr(void) |
1da177e4 LT |
1009 | { |
1010 | if (use_dma == 0) | |
1011 | return "(dma disabled)"; | |
1012 | else if (use_dma == 2) | |
1013 | return "(dma IN and OUT)"; | |
1014 | else | |
1015 | return "(dma IN)"; | |
1016 | } | |
1017 | ||
1018 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
1019 | ||
1020 | static const char proc_node_name [] = "driver/udc"; | |
1021 | ||
1022 | #define FOURBITS "%s%s%s%s" | |
1023 | #define EIGHTBITS FOURBITS FOURBITS | |
1024 | ||
96c7a22e | 1025 | static void dump_intmask(struct seq_file *m, const char *label, u32 mask) |
1da177e4 | 1026 | { |
1da177e4 | 1027 | /* int_status is the same format ... */ |
96c7a22e | 1028 | seq_printf(m, |
1da177e4 LT |
1029 | "%s %05X =" FOURBITS EIGHTBITS EIGHTBITS "\n", |
1030 | label, mask, | |
1031 | (mask & INT_PWRDETECT) ? " power" : "", | |
1032 | (mask & INT_SYSERROR) ? " sys" : "", | |
1033 | (mask & INT_MSTRDEND) ? " in-dma" : "", | |
1034 | (mask & INT_MSTWRTMOUT) ? " wrtmo" : "", | |
1035 | ||
1036 | (mask & INT_MSTWREND) ? " out-dma" : "", | |
1037 | (mask & INT_MSTWRSET) ? " wrset" : "", | |
1038 | (mask & INT_ERR) ? " err" : "", | |
1039 | (mask & INT_SOF) ? " sof" : "", | |
1040 | ||
1041 | (mask & INT_EP3NAK) ? " ep3nak" : "", | |
1042 | (mask & INT_EP2NAK) ? " ep2nak" : "", | |
1043 | (mask & INT_EP1NAK) ? " ep1nak" : "", | |
1044 | (mask & INT_EP3DATASET) ? " ep3" : "", | |
1045 | ||
1046 | (mask & INT_EP2DATASET) ? " ep2" : "", | |
1047 | (mask & INT_EP1DATASET) ? " ep1" : "", | |
1048 | (mask & INT_STATUSNAK) ? " ep0snak" : "", | |
1049 | (mask & INT_STATUS) ? " ep0status" : "", | |
1050 | ||
1051 | (mask & INT_SETUP) ? " setup" : "", | |
1052 | (mask & INT_ENDPOINT0) ? " ep0" : "", | |
1053 | (mask & INT_USBRESET) ? " reset" : "", | |
1054 | (mask & INT_SUSPEND) ? " suspend" : ""); | |
1da177e4 LT |
1055 | } |
1056 | ||
1057 | ||
96c7a22e | 1058 | static int udc_proc_read(struct seq_file *m, void *v) |
1da177e4 | 1059 | { |
96c7a22e | 1060 | struct goku_udc *dev = m->private; |
1da177e4 | 1061 | struct goku_udc_regs __iomem *regs = dev->regs; |
1da177e4 | 1062 | unsigned long flags; |
96c7a22e | 1063 | int i, is_usb_connected; |
1da177e4 LT |
1064 | u32 tmp; |
1065 | ||
1da177e4 LT |
1066 | local_irq_save(flags); |
1067 | ||
1068 | /* basic device status */ | |
1069 | tmp = readl(®s->power_detect); | |
1070 | is_usb_connected = tmp & PW_DETECT; | |
96c7a22e | 1071 | seq_printf(m, |
1da177e4 LT |
1072 | "%s - %s\n" |
1073 | "%s version: %s %s\n" | |
1074 | "Gadget driver: %s\n" | |
1075 | "Host %s, %s\n" | |
1076 | "\n", | |
1077 | pci_name(dev->pdev), driver_desc, | |
1078 | driver_name, DRIVER_VERSION, dmastr(), | |
1079 | dev->driver ? dev->driver->driver.name : "(none)", | |
1080 | is_usb_connected | |
1081 | ? ((tmp & PW_PULLUP) ? "full speed" : "powered") | |
1082 | : "disconnected", | |
96c7a22e | 1083 | ({const char *state; |
1da177e4 | 1084 | switch(dev->ep0state){ |
2d70c99b DB |
1085 | case EP0_DISCONNECT: state = "ep0_disconnect"; break; |
1086 | case EP0_IDLE: state = "ep0_idle"; break; | |
1087 | case EP0_IN: state = "ep0_in"; break; | |
1088 | case EP0_OUT: state = "ep0_out"; break; | |
1089 | case EP0_STATUS: state = "ep0_status"; break; | |
1090 | case EP0_STALL: state = "ep0_stall"; break; | |
1091 | case EP0_SUSPEND: state = "ep0_suspend"; break; | |
1092 | default: state = "ep0_?"; break; | |
1093 | } state; }) | |
1da177e4 | 1094 | ); |
1da177e4 | 1095 | |
96c7a22e DH |
1096 | dump_intmask(m, "int_status", readl(®s->int_status)); |
1097 | dump_intmask(m, "int_enable", readl(®s->int_enable)); | |
1da177e4 LT |
1098 | |
1099 | if (!is_usb_connected || !dev->driver || (tmp & PW_PULLUP) == 0) | |
1100 | goto done; | |
1101 | ||
1102 | /* registers for (active) device and ep0 */ | |
96c7a22e | 1103 | if (seq_printf(m, "\nirqs %lu\ndataset %02x " |
1da177e4 LT |
1104 | "single.bcs %02x.%02x state %x addr %u\n", |
1105 | dev->irqs, readl(®s->DataSet), | |
1106 | readl(®s->EPxSingle), readl(®s->EPxBCS), | |
1107 | readl(®s->UsbState), | |
96c7a22e DH |
1108 | readl(®s->address)) < 0) |
1109 | goto done; | |
1da177e4 LT |
1110 | |
1111 | tmp = readl(®s->dma_master); | |
96c7a22e | 1112 | if (seq_printf(m, |
1da177e4 LT |
1113 | "dma %03X =" EIGHTBITS "%s %s\n", tmp, |
1114 | (tmp & MST_EOPB_DIS) ? " eopb-" : "", | |
1115 | (tmp & MST_EOPB_ENA) ? " eopb+" : "", | |
1116 | (tmp & MST_TIMEOUT_DIS) ? " tmo-" : "", | |
1117 | (tmp & MST_TIMEOUT_ENA) ? " tmo+" : "", | |
1118 | ||
1119 | (tmp & MST_RD_EOPB) ? " eopb" : "", | |
1120 | (tmp & MST_RD_RESET) ? " in_reset" : "", | |
1121 | (tmp & MST_WR_RESET) ? " out_reset" : "", | |
1122 | (tmp & MST_RD_ENA) ? " IN" : "", | |
1123 | ||
1124 | (tmp & MST_WR_ENA) ? " OUT" : "", | |
1125 | (tmp & MST_CONNECTION) | |
1126 | ? "ep1in/ep2out" | |
96c7a22e DH |
1127 | : "ep1out/ep2in") < 0) |
1128 | goto done; | |
1da177e4 LT |
1129 | |
1130 | /* dump endpoint queues */ | |
1131 | for (i = 0; i < 4; i++) { | |
1132 | struct goku_ep *ep = &dev->ep [i]; | |
1133 | struct goku_request *req; | |
1da177e4 | 1134 | |
db79d981 | 1135 | if (i && !ep->ep.desc) |
1da177e4 LT |
1136 | continue; |
1137 | ||
1138 | tmp = readl(ep->reg_status); | |
96c7a22e | 1139 | if (seq_printf(m, |
1da177e4 LT |
1140 | "%s %s max %u %s, irqs %lu, " |
1141 | "status %02x (%s) " FOURBITS "\n", | |
1142 | ep->ep.name, | |
1143 | ep->is_in ? "in" : "out", | |
1144 | ep->ep.maxpacket, | |
1145 | ep->dma ? "dma" : "pio", | |
1146 | ep->irqs, | |
1147 | tmp, ({ char *s; | |
1148 | switch (tmp & EPxSTATUS_EP_MASK) { | |
1149 | case EPxSTATUS_EP_READY: | |
1150 | s = "ready"; break; | |
1151 | case EPxSTATUS_EP_DATAIN: | |
1152 | s = "packet"; break; | |
1153 | case EPxSTATUS_EP_FULL: | |
1154 | s = "full"; break; | |
1155 | case EPxSTATUS_EP_TX_ERR: // host will retry | |
1156 | s = "tx_err"; break; | |
1157 | case EPxSTATUS_EP_RX_ERR: | |
1158 | s = "rx_err"; break; | |
1159 | case EPxSTATUS_EP_BUSY: /* ep0 only */ | |
1160 | s = "busy"; break; | |
1161 | case EPxSTATUS_EP_STALL: | |
1162 | s = "stall"; break; | |
1163 | case EPxSTATUS_EP_INVALID: // these "can't happen" | |
1164 | s = "invalid"; break; | |
1165 | default: | |
1166 | s = "?"; break; | |
2b84f92b | 1167 | } s; }), |
1da177e4 LT |
1168 | (tmp & EPxSTATUS_TOGGLE) ? "data1" : "data0", |
1169 | (tmp & EPxSTATUS_SUSPEND) ? " suspend" : "", | |
1170 | (tmp & EPxSTATUS_FIFO_DISABLE) ? " disable" : "", | |
1171 | (tmp & EPxSTATUS_STAGE_ERROR) ? " ep0stat" : "" | |
96c7a22e | 1172 | ) < 0) |
1da177e4 | 1173 | goto done; |
1da177e4 LT |
1174 | |
1175 | if (list_empty(&ep->queue)) { | |
96c7a22e | 1176 | if (seq_puts(m, "\t(nothing queued)\n") < 0) |
1da177e4 | 1177 | goto done; |
1da177e4 LT |
1178 | continue; |
1179 | } | |
1180 | list_for_each_entry(req, &ep->queue, queue) { | |
1181 | if (ep->dma && req->queue.prev == &ep->queue) { | |
1182 | if (i == UDC_MSTRD_ENDPOINT) | |
1183 | tmp = readl(®s->in_dma_current); | |
1184 | else | |
1185 | tmp = readl(®s->out_dma_current); | |
1186 | tmp -= req->req.dma; | |
1187 | tmp++; | |
1188 | } else | |
1189 | tmp = req->req.actual; | |
1190 | ||
96c7a22e | 1191 | if (seq_printf(m, |
1da177e4 LT |
1192 | "\treq %p len %u/%u buf %p\n", |
1193 | &req->req, tmp, req->req.length, | |
96c7a22e | 1194 | req->req.buf) < 0) |
1da177e4 | 1195 | goto done; |
1da177e4 LT |
1196 | } |
1197 | } | |
1198 | ||
1199 | done: | |
1200 | local_irq_restore(flags); | |
96c7a22e DH |
1201 | return 0; |
1202 | } | |
1203 | ||
1204 | /* | |
1205 | * seq_file wrappers for procfile show routines. | |
1206 | */ | |
1207 | static int udc_proc_open(struct inode *inode, struct file *file) | |
1208 | { | |
1209 | return single_open(file, udc_proc_read, PDE_DATA(file_inode(file))); | |
1da177e4 LT |
1210 | } |
1211 | ||
96c7a22e DH |
1212 | static const struct file_operations udc_proc_fops = { |
1213 | .open = udc_proc_open, | |
1214 | .read = seq_read, | |
1215 | .llseek = seq_lseek, | |
962a1ab2 | 1216 | .release = single_release, |
96c7a22e DH |
1217 | }; |
1218 | ||
1da177e4 LT |
1219 | #endif /* CONFIG_USB_GADGET_DEBUG_FILES */ |
1220 | ||
1221 | /*-------------------------------------------------------------------------*/ | |
1222 | ||
1223 | static void udc_reinit (struct goku_udc *dev) | |
1224 | { | |
1225 | static char *names [] = { "ep0", "ep1-bulk", "ep2-bulk", "ep3-bulk" }; | |
2d70c99b | 1226 | |
1da177e4 LT |
1227 | unsigned i; |
1228 | ||
1229 | INIT_LIST_HEAD (&dev->gadget.ep_list); | |
1230 | dev->gadget.ep0 = &dev->ep [0].ep; | |
1231 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
1232 | dev->ep0state = EP0_DISCONNECT; | |
1233 | dev->irqs = 0; | |
1234 | ||
1235 | for (i = 0; i < 4; i++) { | |
1236 | struct goku_ep *ep = &dev->ep[i]; | |
1237 | ||
1238 | ep->num = i; | |
1239 | ep->ep.name = names[i]; | |
1240 | ep->reg_fifo = &dev->regs->ep_fifo [i]; | |
1241 | ep->reg_status = &dev->regs->ep_status [i]; | |
1242 | ep->reg_mode = &dev->regs->ep_mode[i]; | |
1243 | ||
1244 | ep->ep.ops = &goku_ep_ops; | |
1245 | list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list); | |
1246 | ep->dev = dev; | |
1247 | INIT_LIST_HEAD (&ep->queue); | |
1248 | ||
1249 | ep_reset(NULL, ep); | |
1250 | } | |
1251 | ||
1252 | dev->ep[0].reg_mode = NULL; | |
e117e742 | 1253 | usb_ep_set_maxpacket_limit(&dev->ep[0].ep, MAX_EP0_SIZE); |
1da177e4 LT |
1254 | list_del_init (&dev->ep[0].ep.ep_list); |
1255 | } | |
1256 | ||
1257 | static void udc_reset(struct goku_udc *dev) | |
1258 | { | |
1259 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1260 | ||
1261 | writel(0, ®s->power_detect); | |
1262 | writel(0, ®s->int_enable); | |
1263 | readl(®s->int_enable); | |
1264 | dev->int_enable = 0; | |
1265 | ||
1266 | /* deassert reset, leave USB D+ at hi-Z (no pullup) | |
1267 | * don't let INT_PWRDETECT sequence begin | |
1268 | */ | |
1269 | udelay(250); | |
1270 | writel(PW_RESETB, ®s->power_detect); | |
1271 | readl(®s->int_enable); | |
1272 | } | |
1273 | ||
1274 | static void ep0_start(struct goku_udc *dev) | |
1275 | { | |
1276 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1277 | unsigned i; | |
1278 | ||
441b62c1 | 1279 | VDBG(dev, "%s\n", __func__); |
1da177e4 LT |
1280 | |
1281 | udc_reset(dev); | |
1282 | udc_reinit (dev); | |
1283 | //writel(MST_EOPB_ENA | MST_TIMEOUT_ENA, ®s->dma_master); | |
1284 | ||
1285 | /* hw handles set_address, set_feature, get_status; maybe more */ | |
1286 | writel( G_REQMODE_SET_INTF | G_REQMODE_GET_INTF | |
1287 | | G_REQMODE_SET_CONF | G_REQMODE_GET_CONF | |
1288 | | G_REQMODE_GET_DESC | |
1289 | | G_REQMODE_CLEAR_FEAT | |
1290 | , ®s->reqmode); | |
1291 | ||
1292 | for (i = 0; i < 4; i++) | |
1293 | dev->ep[i].irqs = 0; | |
1294 | ||
1295 | /* can't modify descriptors after writing UsbReady */ | |
1296 | for (i = 0; i < DESC_LEN; i++) | |
1297 | writel(0, ®s->descriptors[i]); | |
1298 | writel(0, ®s->UsbReady); | |
1299 | ||
1300 | /* expect ep0 requests when the host drops reset */ | |
1301 | writel(PW_RESETB | PW_PULLUP, ®s->power_detect); | |
1302 | dev->int_enable = INT_DEVWIDE | INT_EP0; | |
1303 | writel(dev->int_enable, &dev->regs->int_enable); | |
1304 | readl(®s->int_enable); | |
1305 | dev->gadget.speed = USB_SPEED_FULL; | |
1306 | dev->ep0state = EP0_IDLE; | |
1307 | } | |
1308 | ||
1309 | static void udc_enable(struct goku_udc *dev) | |
1310 | { | |
1311 | /* start enumeration now, or after power detect irq */ | |
1312 | if (readl(&dev->regs->power_detect) & PW_DETECT) | |
1313 | ep0_start(dev); | |
1314 | else { | |
441b62c1 | 1315 | DBG(dev, "%s\n", __func__); |
1da177e4 LT |
1316 | dev->int_enable = INT_PWRDETECT; |
1317 | writel(dev->int_enable, &dev->regs->int_enable); | |
1318 | } | |
1319 | } | |
1320 | ||
1321 | /*-------------------------------------------------------------------------*/ | |
1322 | ||
1323 | /* keeping it simple: | |
1324 | * - one bus driver, initted first; | |
1325 | * - one function driver, initted second | |
1326 | */ | |
1327 | ||
1da177e4 LT |
1328 | /* when a driver is successfully registered, it will receive |
1329 | * control requests including set_configuration(), which enables | |
1330 | * non-control requests. then usb traffic follows until a | |
1331 | * disconnect is reported. then a host may connect again, or | |
1332 | * the driver might get unbound. | |
1333 | */ | |
950b3c1d FB |
1334 | static int goku_udc_start(struct usb_gadget *g, |
1335 | struct usb_gadget_driver *driver) | |
1da177e4 | 1336 | { |
950b3c1d | 1337 | struct goku_udc *dev = to_goku_udc(g); |
1da177e4 LT |
1338 | |
1339 | /* hook up the driver */ | |
1340 | driver->driver.bus = NULL; | |
1341 | dev->driver = driver; | |
1da177e4 | 1342 | |
950b3c1d FB |
1343 | /* |
1344 | * then enable host detection and ep0; and we're ready | |
1da177e4 LT |
1345 | * for set_configuration as well as eventual disconnect. |
1346 | */ | |
1347 | udc_enable(dev); | |
1348 | ||
1da177e4 LT |
1349 | return 0; |
1350 | } | |
1da177e4 | 1351 | |
4fbc5566 | 1352 | static void stop_activity(struct goku_udc *dev) |
1da177e4 LT |
1353 | { |
1354 | unsigned i; | |
1355 | ||
441b62c1 | 1356 | DBG (dev, "%s\n", __func__); |
1da177e4 | 1357 | |
1da177e4 LT |
1358 | /* disconnect gadget driver after quiesceing hw and the driver */ |
1359 | udc_reset (dev); | |
1360 | for (i = 0; i < 4; i++) | |
1361 | nuke(&dev->ep [i], -ESHUTDOWN); | |
1da177e4 LT |
1362 | |
1363 | if (dev->driver) | |
1364 | udc_enable(dev); | |
1365 | } | |
1366 | ||
950b3c1d FB |
1367 | static int goku_udc_stop(struct usb_gadget *g, |
1368 | struct usb_gadget_driver *driver) | |
1da177e4 | 1369 | { |
950b3c1d | 1370 | struct goku_udc *dev = to_goku_udc(g); |
1da177e4 LT |
1371 | unsigned long flags; |
1372 | ||
1da177e4 LT |
1373 | spin_lock_irqsave(&dev->lock, flags); |
1374 | dev->driver = NULL; | |
4fbc5566 | 1375 | stop_activity(dev); |
1da177e4 | 1376 | spin_unlock_irqrestore(&dev->lock, flags); |
1da177e4 | 1377 | |
1da177e4 LT |
1378 | return 0; |
1379 | } | |
1da177e4 LT |
1380 | |
1381 | /*-------------------------------------------------------------------------*/ | |
1382 | ||
1383 | static void ep0_setup(struct goku_udc *dev) | |
1384 | { | |
1385 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1386 | struct usb_ctrlrequest ctrl; | |
1387 | int tmp; | |
1388 | ||
1389 | /* read SETUP packet and enter DATA stage */ | |
1390 | ctrl.bRequestType = readl(®s->bRequestType); | |
1391 | ctrl.bRequest = readl(®s->bRequest); | |
988199fe DB |
1392 | ctrl.wValue = cpu_to_le16((readl(®s->wValueH) << 8) |
1393 | | readl(®s->wValueL)); | |
1394 | ctrl.wIndex = cpu_to_le16((readl(®s->wIndexH) << 8) | |
1395 | | readl(®s->wIndexL)); | |
1396 | ctrl.wLength = cpu_to_le16((readl(®s->wLengthH) << 8) | |
1397 | | readl(®s->wLengthL)); | |
1da177e4 LT |
1398 | writel(0, ®s->SetupRecv); |
1399 | ||
1400 | nuke(&dev->ep[0], 0); | |
1401 | dev->ep[0].stopped = 0; | |
1402 | if (likely(ctrl.bRequestType & USB_DIR_IN)) { | |
1403 | dev->ep[0].is_in = 1; | |
1404 | dev->ep0state = EP0_IN; | |
1405 | /* detect early status stages */ | |
1406 | writel(ICONTROL_STATUSNAK, &dev->regs->IntControl); | |
1407 | } else { | |
1408 | dev->ep[0].is_in = 0; | |
1409 | dev->ep0state = EP0_OUT; | |
1410 | ||
1411 | /* NOTE: CLEAR_FEATURE is done in software so that we can | |
1412 | * synchronize transfer restarts after bulk IN stalls. data | |
1413 | * won't even enter the fifo until the halt is cleared. | |
1414 | */ | |
1415 | switch (ctrl.bRequest) { | |
1416 | case USB_REQ_CLEAR_FEATURE: | |
1417 | switch (ctrl.bRequestType) { | |
1418 | case USB_RECIP_ENDPOINT: | |
988199fe | 1419 | tmp = le16_to_cpu(ctrl.wIndex) & 0x0f; |
1da177e4 | 1420 | /* active endpoint */ |
db79d981 IS |
1421 | if (tmp > 3 || |
1422 | (!dev->ep[tmp].ep.desc && tmp != 0)) | |
1da177e4 | 1423 | goto stall; |
551509d2 | 1424 | if (ctrl.wIndex & cpu_to_le16( |
988199fe | 1425 | USB_DIR_IN)) { |
1da177e4 LT |
1426 | if (!dev->ep[tmp].is_in) |
1427 | goto stall; | |
1428 | } else { | |
1429 | if (dev->ep[tmp].is_in) | |
1430 | goto stall; | |
1431 | } | |
551509d2 | 1432 | if (ctrl.wValue != cpu_to_le16( |
988199fe | 1433 | USB_ENDPOINT_HALT)) |
1da177e4 LT |
1434 | goto stall; |
1435 | if (tmp) | |
1436 | goku_clear_halt(&dev->ep[tmp]); | |
1437 | succeed: | |
1438 | /* start ep0out status stage */ | |
1439 | writel(~(1<<0), ®s->EOP); | |
1440 | dev->ep[0].stopped = 1; | |
1441 | dev->ep0state = EP0_STATUS; | |
1442 | return; | |
1443 | case USB_RECIP_DEVICE: | |
1444 | /* device remote wakeup: always clear */ | |
551509d2 | 1445 | if (ctrl.wValue != cpu_to_le16(1)) |
1da177e4 LT |
1446 | goto stall; |
1447 | VDBG(dev, "clear dev remote wakeup\n"); | |
1448 | goto succeed; | |
1449 | case USB_RECIP_INTERFACE: | |
1450 | goto stall; | |
1451 | default: /* pass to gadget driver */ | |
1452 | break; | |
1453 | } | |
1454 | break; | |
1455 | default: | |
1456 | break; | |
1457 | } | |
1458 | } | |
1459 | ||
1460 | #ifdef USB_TRACE | |
1461 | VDBG(dev, "SETUP %02x.%02x v%04x i%04x l%04x\n", | |
1462 | ctrl.bRequestType, ctrl.bRequest, | |
988199fe DB |
1463 | le16_to_cpu(ctrl.wValue), le16_to_cpu(ctrl.wIndex), |
1464 | le16_to_cpu(ctrl.wLength)); | |
1da177e4 LT |
1465 | #endif |
1466 | ||
1467 | /* hw wants to know when we're configured (or not) */ | |
1468 | dev->req_config = (ctrl.bRequest == USB_REQ_SET_CONFIGURATION | |
1469 | && ctrl.bRequestType == USB_RECIP_DEVICE); | |
1470 | if (unlikely(dev->req_config)) | |
551509d2 | 1471 | dev->configured = (ctrl.wValue != cpu_to_le16(0)); |
1da177e4 LT |
1472 | |
1473 | /* delegate everything to the gadget driver. | |
1474 | * it may respond after this irq handler returns. | |
1475 | */ | |
1476 | spin_unlock (&dev->lock); | |
1477 | tmp = dev->driver->setup(&dev->gadget, &ctrl); | |
1478 | spin_lock (&dev->lock); | |
1479 | if (unlikely(tmp < 0)) { | |
1480 | stall: | |
1481 | #ifdef USB_TRACE | |
1482 | VDBG(dev, "req %02x.%02x protocol STALL; err %d\n", | |
1483 | ctrl.bRequestType, ctrl.bRequest, tmp); | |
1484 | #endif | |
1485 | command(regs, COMMAND_STALL, 0); | |
1486 | dev->ep[0].stopped = 1; | |
1487 | dev->ep0state = EP0_STALL; | |
1488 | } | |
1489 | ||
1490 | /* expect at least one data or status stage irq */ | |
1491 | } | |
1492 | ||
1493 | #define ACK(irqbit) { \ | |
1494 | stat &= ~irqbit; \ | |
1495 | writel(~irqbit, ®s->int_status); \ | |
1496 | handled = 1; \ | |
1497 | } | |
1498 | ||
7d12e780 | 1499 | static irqreturn_t goku_irq(int irq, void *_dev) |
1da177e4 LT |
1500 | { |
1501 | struct goku_udc *dev = _dev; | |
1502 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1503 | struct goku_ep *ep; | |
1504 | u32 stat, handled = 0; | |
1505 | unsigned i, rescans = 5; | |
1506 | ||
1507 | spin_lock(&dev->lock); | |
1508 | ||
1509 | rescan: | |
1510 | stat = readl(®s->int_status) & dev->int_enable; | |
1511 | if (!stat) | |
1512 | goto done; | |
1513 | dev->irqs++; | |
1514 | ||
1515 | /* device-wide irqs */ | |
1516 | if (unlikely(stat & INT_DEVWIDE)) { | |
1517 | if (stat & INT_SYSERROR) { | |
1518 | ERROR(dev, "system error\n"); | |
4fbc5566 | 1519 | stop_activity(dev); |
1da177e4 LT |
1520 | stat = 0; |
1521 | handled = 1; | |
1522 | // FIXME have a neater way to prevent re-enumeration | |
1523 | dev->driver = NULL; | |
1524 | goto done; | |
1525 | } | |
1526 | if (stat & INT_PWRDETECT) { | |
1527 | writel(~stat, ®s->int_status); | |
1528 | if (readl(&dev->regs->power_detect) & PW_DETECT) { | |
1529 | VDBG(dev, "connect\n"); | |
1530 | ep0_start(dev); | |
1531 | } else { | |
1532 | DBG(dev, "disconnect\n"); | |
1533 | if (dev->gadget.speed == USB_SPEED_FULL) | |
4fbc5566 | 1534 | stop_activity(dev); |
1da177e4 LT |
1535 | dev->ep0state = EP0_DISCONNECT; |
1536 | dev->int_enable = INT_DEVWIDE; | |
1537 | writel(dev->int_enable, &dev->regs->int_enable); | |
1538 | } | |
1539 | stat = 0; | |
1540 | handled = 1; | |
1541 | goto done; | |
1542 | } | |
1543 | if (stat & INT_SUSPEND) { | |
1544 | ACK(INT_SUSPEND); | |
1545 | if (readl(®s->ep_status[0]) & EPxSTATUS_SUSPEND) { | |
1546 | switch (dev->ep0state) { | |
1547 | case EP0_DISCONNECT: | |
1548 | case EP0_SUSPEND: | |
1549 | goto pm_next; | |
1550 | default: | |
1551 | break; | |
1552 | } | |
1553 | DBG(dev, "USB suspend\n"); | |
1554 | dev->ep0state = EP0_SUSPEND; | |
1555 | if (dev->gadget.speed != USB_SPEED_UNKNOWN | |
1556 | && dev->driver | |
1557 | && dev->driver->suspend) { | |
1558 | spin_unlock(&dev->lock); | |
1559 | dev->driver->suspend(&dev->gadget); | |
1560 | spin_lock(&dev->lock); | |
1561 | } | |
1562 | } else { | |
1563 | if (dev->ep0state != EP0_SUSPEND) { | |
1564 | DBG(dev, "bogus USB resume %d\n", | |
1565 | dev->ep0state); | |
1566 | goto pm_next; | |
1567 | } | |
1568 | DBG(dev, "USB resume\n"); | |
1569 | dev->ep0state = EP0_IDLE; | |
1570 | if (dev->gadget.speed != USB_SPEED_UNKNOWN | |
1571 | && dev->driver | |
1572 | && dev->driver->resume) { | |
1573 | spin_unlock(&dev->lock); | |
1574 | dev->driver->resume(&dev->gadget); | |
1575 | spin_lock(&dev->lock); | |
1576 | } | |
1577 | } | |
1578 | } | |
1579 | pm_next: | |
1580 | if (stat & INT_USBRESET) { /* hub reset done */ | |
1581 | ACK(INT_USBRESET); | |
1582 | INFO(dev, "USB reset done, gadget %s\n", | |
1583 | dev->driver->driver.name); | |
1584 | } | |
1585 | // and INT_ERR on some endpoint's crc/bitstuff/... problem | |
1586 | } | |
1587 | ||
1588 | /* progress ep0 setup, data, or status stages. | |
1589 | * no transition {EP0_STATUS, EP0_STALL} --> EP0_IDLE; saves irqs | |
1590 | */ | |
1591 | if (stat & INT_SETUP) { | |
1592 | ACK(INT_SETUP); | |
1593 | dev->ep[0].irqs++; | |
1594 | ep0_setup(dev); | |
1595 | } | |
1596 | if (stat & INT_STATUSNAK) { | |
1597 | ACK(INT_STATUSNAK|INT_ENDPOINT0); | |
1598 | if (dev->ep0state == EP0_IN) { | |
1599 | ep = &dev->ep[0]; | |
1600 | ep->irqs++; | |
1601 | nuke(ep, 0); | |
1602 | writel(~(1<<0), ®s->EOP); | |
1603 | dev->ep0state = EP0_STATUS; | |
1604 | } | |
1605 | } | |
1606 | if (stat & INT_ENDPOINT0) { | |
1607 | ACK(INT_ENDPOINT0); | |
1608 | ep = &dev->ep[0]; | |
1609 | ep->irqs++; | |
1610 | pio_advance(ep); | |
1611 | } | |
1612 | ||
1613 | /* dma completion */ | |
1614 | if (stat & INT_MSTRDEND) { /* IN */ | |
1615 | ACK(INT_MSTRDEND); | |
1616 | ep = &dev->ep[UDC_MSTRD_ENDPOINT]; | |
1617 | ep->irqs++; | |
1618 | dma_advance(dev, ep); | |
1619 | } | |
1620 | if (stat & INT_MSTWREND) { /* OUT */ | |
1621 | ACK(INT_MSTWREND); | |
1622 | ep = &dev->ep[UDC_MSTWR_ENDPOINT]; | |
1623 | ep->irqs++; | |
1624 | dma_advance(dev, ep); | |
1625 | } | |
1626 | if (stat & INT_MSTWRTMOUT) { /* OUT */ | |
1627 | ACK(INT_MSTWRTMOUT); | |
1628 | ep = &dev->ep[UDC_MSTWR_ENDPOINT]; | |
1629 | ep->irqs++; | |
1630 | ERROR(dev, "%s write timeout ?\n", ep->ep.name); | |
1631 | // reset dma? then dma_advance() | |
1632 | } | |
1633 | ||
1634 | /* pio */ | |
1635 | for (i = 1; i < 4; i++) { | |
1636 | u32 tmp = INT_EPxDATASET(i); | |
1637 | ||
1638 | if (!(stat & tmp)) | |
1639 | continue; | |
1640 | ep = &dev->ep[i]; | |
1641 | pio_advance(ep); | |
1642 | if (list_empty (&ep->queue)) | |
1643 | pio_irq_disable(dev, regs, i); | |
1644 | stat &= ~tmp; | |
1645 | handled = 1; | |
1646 | ep->irqs++; | |
1647 | } | |
1648 | ||
1649 | if (rescans--) | |
1650 | goto rescan; | |
1651 | ||
1652 | done: | |
1653 | (void)readl(®s->int_enable); | |
1654 | spin_unlock(&dev->lock); | |
1655 | if (stat) | |
1656 | DBG(dev, "unhandled irq status: %05x (%05x, %05x)\n", stat, | |
1657 | readl(®s->int_status), dev->int_enable); | |
1658 | return IRQ_RETVAL(handled); | |
1659 | } | |
1660 | ||
1661 | #undef ACK | |
1662 | ||
1663 | /*-------------------------------------------------------------------------*/ | |
1664 | ||
1665 | static void gadget_release(struct device *_dev) | |
1666 | { | |
1667 | struct goku_udc *dev = dev_get_drvdata(_dev); | |
1668 | ||
1669 | kfree(dev); | |
1670 | } | |
1671 | ||
1672 | /* tear down the binding between this driver and the pci device */ | |
1673 | ||
1674 | static void goku_remove(struct pci_dev *pdev) | |
1675 | { | |
1676 | struct goku_udc *dev = pci_get_drvdata(pdev); | |
1677 | ||
441b62c1 | 1678 | DBG(dev, "%s\n", __func__); |
6bea476c | 1679 | |
0f91349b SAS |
1680 | usb_del_gadget_udc(&dev->gadget); |
1681 | ||
6bea476c | 1682 | BUG_ON(dev->driver); |
1da177e4 LT |
1683 | |
1684 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
1685 | remove_proc_entry(proc_node_name, NULL); | |
1686 | #endif | |
1687 | if (dev->regs) | |
1688 | udc_reset(dev); | |
1689 | if (dev->got_irq) | |
1690 | free_irq(pdev->irq, dev); | |
1691 | if (dev->regs) | |
1692 | iounmap(dev->regs); | |
1693 | if (dev->got_region) | |
1694 | release_mem_region(pci_resource_start (pdev, 0), | |
1695 | pci_resource_len (pdev, 0)); | |
1696 | if (dev->enabled) | |
1697 | pci_disable_device(pdev); | |
1da177e4 | 1698 | |
1da177e4 | 1699 | dev->regs = NULL; |
1da177e4 LT |
1700 | |
1701 | INFO(dev, "unbind\n"); | |
1702 | } | |
1703 | ||
1704 | /* wrap this driver around the specified pci device, but | |
1705 | * don't respond over USB until a gadget driver binds to us. | |
1706 | */ | |
1707 | ||
1708 | static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id) | |
1709 | { | |
1710 | struct goku_udc *dev = NULL; | |
1711 | unsigned long resource, len; | |
1712 | void __iomem *base = NULL; | |
1713 | int retval; | |
1da177e4 | 1714 | |
1da177e4 LT |
1715 | if (!pdev->irq) { |
1716 | printk(KERN_ERR "Check PCI %s IRQ setup!\n", pci_name(pdev)); | |
1717 | retval = -ENODEV; | |
319feaab | 1718 | goto err; |
1da177e4 LT |
1719 | } |
1720 | ||
1721 | /* alloc, and start init */ | |
dd00cc48 | 1722 | dev = kzalloc (sizeof *dev, GFP_KERNEL); |
1da177e4 LT |
1723 | if (dev == NULL){ |
1724 | pr_debug("enomem %s\n", pci_name(pdev)); | |
1725 | retval = -ENOMEM; | |
319feaab | 1726 | goto err; |
1da177e4 LT |
1727 | } |
1728 | ||
1da177e4 LT |
1729 | spin_lock_init(&dev->lock); |
1730 | dev->pdev = pdev; | |
1731 | dev->gadget.ops = &goku_ops; | |
d327ab5b | 1732 | dev->gadget.max_speed = USB_SPEED_FULL; |
1da177e4 LT |
1733 | |
1734 | /* the "gadget" abstracts/virtualizes the controller */ | |
1da177e4 LT |
1735 | dev->gadget.name = driver_name; |
1736 | ||
1737 | /* now all the pci goodies ... */ | |
1738 | retval = pci_enable_device(pdev); | |
1739 | if (retval < 0) { | |
1740 | DBG(dev, "can't enable, %d\n", retval); | |
319feaab | 1741 | goto err; |
1da177e4 LT |
1742 | } |
1743 | dev->enabled = 1; | |
1744 | ||
1745 | resource = pci_resource_start(pdev, 0); | |
1746 | len = pci_resource_len(pdev, 0); | |
1747 | if (!request_mem_region(resource, len, driver_name)) { | |
1748 | DBG(dev, "controller already in use\n"); | |
1749 | retval = -EBUSY; | |
319feaab | 1750 | goto err; |
1da177e4 LT |
1751 | } |
1752 | dev->got_region = 1; | |
1753 | ||
1754 | base = ioremap_nocache(resource, len); | |
1755 | if (base == NULL) { | |
1756 | DBG(dev, "can't map memory\n"); | |
1757 | retval = -EFAULT; | |
319feaab | 1758 | goto err; |
1da177e4 LT |
1759 | } |
1760 | dev->regs = (struct goku_udc_regs __iomem *) base; | |
1761 | ||
1762 | pci_set_drvdata(pdev, dev); | |
1763 | INFO(dev, "%s\n", driver_desc); | |
1764 | INFO(dev, "version: " DRIVER_VERSION " %s\n", dmastr()); | |
c6387a48 | 1765 | INFO(dev, "irq %d, pci mem %p\n", pdev->irq, base); |
1da177e4 LT |
1766 | |
1767 | /* init to known state, then setup irqs */ | |
1768 | udc_reset(dev); | |
1769 | udc_reinit (dev); | |
11bc2683 | 1770 | if (request_irq(pdev->irq, goku_irq, IRQF_SHARED, |
1da177e4 | 1771 | driver_name, dev) != 0) { |
c6387a48 | 1772 | DBG(dev, "request interrupt %d failed\n", pdev->irq); |
1da177e4 | 1773 | retval = -EBUSY; |
319feaab | 1774 | goto err; |
1da177e4 LT |
1775 | } |
1776 | dev->got_irq = 1; | |
1777 | if (use_dma) | |
1778 | pci_set_master(pdev); | |
1779 | ||
1780 | ||
1781 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
96c7a22e | 1782 | proc_create_data(proc_node_name, 0, NULL, &udc_proc_fops, dev); |
1da177e4 LT |
1783 | #endif |
1784 | ||
2ae837e4 FB |
1785 | retval = usb_add_gadget_udc_release(&pdev->dev, &dev->gadget, |
1786 | gadget_release); | |
0f91349b SAS |
1787 | if (retval) |
1788 | goto err; | |
1789 | ||
319feaab | 1790 | return 0; |
1da177e4 | 1791 | |
319feaab | 1792 | err: |
1da177e4 LT |
1793 | if (dev) |
1794 | goku_remove (pdev); | |
1795 | return retval; | |
1796 | } | |
1797 | ||
1798 | ||
1799 | /*-------------------------------------------------------------------------*/ | |
1800 | ||
1ba2557f | 1801 | static const struct pci_device_id pci_ids[] = { { |
2d70c99b DB |
1802 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), |
1803 | .class_mask = ~0, | |
1da177e4 LT |
1804 | .vendor = 0x102f, /* Toshiba */ |
1805 | .device = 0x0107, /* this UDC */ | |
1806 | .subvendor = PCI_ANY_ID, | |
1807 | .subdevice = PCI_ANY_ID, | |
1808 | ||
1809 | }, { /* end: all zeroes */ } | |
1810 | }; | |
1811 | MODULE_DEVICE_TABLE (pci, pci_ids); | |
1812 | ||
1813 | static struct pci_driver goku_pci_driver = { | |
1814 | .name = (char *) driver_name, | |
1815 | .id_table = pci_ids, | |
1816 | ||
1817 | .probe = goku_probe, | |
1818 | .remove = goku_remove, | |
1819 | ||
1820 | /* FIXME add power management support */ | |
1821 | }; | |
1822 | ||
3cdb7721 | 1823 | module_pci_driver(goku_pci_driver); |