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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 | ||
23 | #undef DEBUG | |
24 | // #define VERBOSE /* extra debug messages (success too) */ | |
25 | // #define USB_TRACE /* packet-level success messages */ | |
26 | ||
1da177e4 LT |
27 | #include <linux/kernel.h> |
28 | #include <linux/module.h> | |
29 | #include <linux/pci.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/ioport.h> | |
1da177e4 | 32 | #include <linux/slab.h> |
1da177e4 LT |
33 | #include <linux/errno.h> |
34 | #include <linux/init.h> | |
35 | #include <linux/timer.h> | |
36 | #include <linux/list.h> | |
37 | #include <linux/interrupt.h> | |
38 | #include <linux/proc_fs.h> | |
39 | #include <linux/device.h> | |
5f848137 | 40 | #include <linux/usb/ch9.h> |
1da177e4 LT |
41 | #include <linux/usb_gadget.h> |
42 | ||
43 | #include <asm/byteorder.h> | |
44 | #include <asm/io.h> | |
45 | #include <asm/irq.h> | |
46 | #include <asm/system.h> | |
47 | #include <asm/unaligned.h> | |
48 | ||
49 | ||
50 | #include "goku_udc.h" | |
51 | ||
52 | #define DRIVER_DESC "TC86C001 USB Device Controller" | |
53 | #define DRIVER_VERSION "30-Oct 2003" | |
54 | ||
55 | #define DMA_ADDR_INVALID (~(dma_addr_t)0) | |
56 | ||
57 | static const char driver_name [] = "goku_udc"; | |
58 | static const char driver_desc [] = DRIVER_DESC; | |
59 | ||
60 | MODULE_AUTHOR("source@mvista.com"); | |
61 | MODULE_DESCRIPTION(DRIVER_DESC); | |
62 | MODULE_LICENSE("GPL"); | |
63 | ||
64 | ||
65 | /* | |
66 | * IN dma behaves ok under testing, though the IN-dma abort paths don't | |
67 | * seem to behave quite as expected. Used by default. | |
68 | * | |
69 | * OUT dma documents design problems handling the common "short packet" | |
988199fe | 70 | * transfer termination policy; it couldn't be enabled by default, even |
1da177e4 LT |
71 | * if the OUT-dma abort problems had a resolution. |
72 | */ | |
73 | static unsigned use_dma = 1; | |
74 | ||
75 | #if 0 | |
76 | //#include <linux/moduleparam.h> | |
77 | /* "modprobe goku_udc use_dma=1" etc | |
78 | * 0 to disable dma | |
79 | * 1 to use IN dma only (normal operation) | |
80 | * 2 to use IN and OUT dma | |
81 | */ | |
82 | module_param(use_dma, uint, S_IRUGO); | |
83 | #endif | |
84 | ||
85 | /*-------------------------------------------------------------------------*/ | |
86 | ||
87 | static void nuke(struct goku_ep *, int status); | |
88 | ||
89 | static inline void | |
90 | command(struct goku_udc_regs __iomem *regs, int command, unsigned epnum) | |
91 | { | |
92 | writel(COMMAND_EP(epnum) | command, ®s->Command); | |
93 | udelay(300); | |
94 | } | |
95 | ||
96 | static int | |
97 | goku_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) | |
98 | { | |
99 | struct goku_udc *dev; | |
100 | struct goku_ep *ep; | |
101 | u32 mode; | |
102 | u16 max; | |
103 | unsigned long flags; | |
104 | ||
105 | ep = container_of(_ep, struct goku_ep, ep); | |
106 | if (!_ep || !desc || ep->desc | |
107 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
108 | return -EINVAL; | |
109 | dev = ep->dev; | |
110 | if (ep == &dev->ep[0]) | |
111 | return -EINVAL; | |
112 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
113 | return -ESHUTDOWN; | |
114 | if (ep->num != (desc->bEndpointAddress & 0x0f)) | |
115 | return -EINVAL; | |
116 | ||
117 | switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { | |
118 | case USB_ENDPOINT_XFER_BULK: | |
119 | case USB_ENDPOINT_XFER_INT: | |
120 | break; | |
121 | default: | |
122 | return -EINVAL; | |
123 | } | |
124 | ||
125 | if ((readl(ep->reg_status) & EPxSTATUS_EP_MASK) | |
126 | != EPxSTATUS_EP_INVALID) | |
127 | return -EBUSY; | |
128 | ||
129 | /* enabling the no-toggle interrupt mode would need an api hook */ | |
130 | mode = 0; | |
131 | max = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize)); | |
132 | switch (max) { | |
133 | case 64: mode++; | |
134 | case 32: mode++; | |
135 | case 16: mode++; | |
136 | case 8: mode <<= 3; | |
137 | break; | |
138 | default: | |
139 | return -EINVAL; | |
140 | } | |
141 | mode |= 2 << 1; /* bulk, or intr-with-toggle */ | |
142 | ||
143 | /* ep1/ep2 dma direction is chosen early; it works in the other | |
144 | * direction, with pio. be cautious with out-dma. | |
145 | */ | |
146 | ep->is_in = (USB_DIR_IN & desc->bEndpointAddress) != 0; | |
147 | if (ep->is_in) { | |
148 | mode |= 1; | |
149 | ep->dma = (use_dma != 0) && (ep->num == UDC_MSTRD_ENDPOINT); | |
150 | } else { | |
151 | ep->dma = (use_dma == 2) && (ep->num == UDC_MSTWR_ENDPOINT); | |
152 | if (ep->dma) | |
153 | DBG(dev, "%s out-dma hides short packets\n", | |
154 | ep->ep.name); | |
155 | } | |
156 | ||
157 | spin_lock_irqsave(&ep->dev->lock, flags); | |
158 | ||
159 | /* ep1 and ep2 can do double buffering and/or dma */ | |
160 | if (ep->num < 3) { | |
161 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
162 | u32 tmp; | |
163 | ||
164 | /* double buffer except (for now) with pio in */ | |
165 | tmp = ((ep->dma || !ep->is_in) | |
166 | ? 0x10 /* double buffered */ | |
167 | : 0x11 /* single buffer */ | |
168 | ) << ep->num; | |
169 | tmp |= readl(®s->EPxSingle); | |
170 | writel(tmp, ®s->EPxSingle); | |
171 | ||
172 | tmp = (ep->dma ? 0x10/*dma*/ : 0x11/*pio*/) << ep->num; | |
173 | tmp |= readl(®s->EPxBCS); | |
174 | writel(tmp, ®s->EPxBCS); | |
175 | } | |
176 | writel(mode, ep->reg_mode); | |
177 | command(ep->dev->regs, COMMAND_RESET, ep->num); | |
178 | ep->ep.maxpacket = max; | |
179 | ep->stopped = 0; | |
180 | ep->desc = desc; | |
181 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
182 | ||
183 | DBG(dev, "enable %s %s %s maxpacket %u\n", ep->ep.name, | |
184 | ep->is_in ? "IN" : "OUT", | |
185 | ep->dma ? "dma" : "pio", | |
186 | max); | |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
191 | static void ep_reset(struct goku_udc_regs __iomem *regs, struct goku_ep *ep) | |
192 | { | |
193 | struct goku_udc *dev = ep->dev; | |
194 | ||
195 | if (regs) { | |
196 | command(regs, COMMAND_INVALID, ep->num); | |
197 | if (ep->num) { | |
198 | if (ep->num == UDC_MSTWR_ENDPOINT) | |
199 | dev->int_enable &= ~(INT_MSTWREND | |
200 | |INT_MSTWRTMOUT); | |
201 | else if (ep->num == UDC_MSTRD_ENDPOINT) | |
202 | dev->int_enable &= ~INT_MSTRDEND; | |
203 | dev->int_enable &= ~INT_EPxDATASET (ep->num); | |
204 | } else | |
205 | dev->int_enable &= ~INT_EP0; | |
206 | writel(dev->int_enable, ®s->int_enable); | |
207 | readl(®s->int_enable); | |
208 | if (ep->num < 3) { | |
209 | struct goku_udc_regs __iomem *r = ep->dev->regs; | |
210 | u32 tmp; | |
211 | ||
212 | tmp = readl(&r->EPxSingle); | |
213 | tmp &= ~(0x11 << ep->num); | |
214 | writel(tmp, &r->EPxSingle); | |
215 | ||
216 | tmp = readl(&r->EPxBCS); | |
217 | tmp &= ~(0x11 << ep->num); | |
218 | writel(tmp, &r->EPxBCS); | |
219 | } | |
220 | /* reset dma in case we're still using it */ | |
221 | if (ep->dma) { | |
222 | u32 master; | |
223 | ||
224 | master = readl(®s->dma_master) & MST_RW_BITS; | |
225 | if (ep->num == UDC_MSTWR_ENDPOINT) { | |
226 | master &= ~MST_W_BITS; | |
227 | master |= MST_WR_RESET; | |
228 | } else { | |
229 | master &= ~MST_R_BITS; | |
230 | master |= MST_RD_RESET; | |
231 | } | |
232 | writel(master, ®s->dma_master); | |
233 | } | |
234 | } | |
235 | ||
236 | ep->ep.maxpacket = MAX_FIFO_SIZE; | |
237 | ep->desc = NULL; | |
238 | ep->stopped = 1; | |
239 | ep->irqs = 0; | |
240 | ep->dma = 0; | |
241 | } | |
242 | ||
243 | static int goku_ep_disable(struct usb_ep *_ep) | |
244 | { | |
245 | struct goku_ep *ep; | |
246 | struct goku_udc *dev; | |
247 | unsigned long flags; | |
248 | ||
249 | ep = container_of(_ep, struct goku_ep, ep); | |
250 | if (!_ep || !ep->desc) | |
251 | return -ENODEV; | |
252 | dev = ep->dev; | |
253 | if (dev->ep0state == EP0_SUSPEND) | |
254 | return -EBUSY; | |
255 | ||
256 | VDBG(dev, "disable %s\n", _ep->name); | |
257 | ||
258 | spin_lock_irqsave(&dev->lock, flags); | |
259 | nuke(ep, -ESHUTDOWN); | |
260 | ep_reset(dev->regs, ep); | |
261 | spin_unlock_irqrestore(&dev->lock, flags); | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
266 | /*-------------------------------------------------------------------------*/ | |
267 | ||
268 | static struct usb_request * | |
55016f10 | 269 | goku_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) |
1da177e4 LT |
270 | { |
271 | struct goku_request *req; | |
272 | ||
273 | if (!_ep) | |
274 | return NULL; | |
7039f422 | 275 | req = kzalloc(sizeof *req, gfp_flags); |
1da177e4 LT |
276 | if (!req) |
277 | return NULL; | |
278 | ||
1da177e4 LT |
279 | req->req.dma = DMA_ADDR_INVALID; |
280 | INIT_LIST_HEAD(&req->queue); | |
281 | return &req->req; | |
282 | } | |
283 | ||
284 | static void | |
285 | goku_free_request(struct usb_ep *_ep, struct usb_request *_req) | |
286 | { | |
287 | struct goku_request *req; | |
288 | ||
289 | if (!_ep || !_req) | |
290 | return; | |
291 | ||
292 | req = container_of(_req, struct goku_request, req); | |
293 | WARN_ON(!list_empty(&req->queue)); | |
294 | kfree(req); | |
295 | } | |
296 | ||
297 | /*-------------------------------------------------------------------------*/ | |
298 | ||
1da177e4 LT |
299 | static void |
300 | done(struct goku_ep *ep, struct goku_request *req, int status) | |
301 | { | |
302 | struct goku_udc *dev; | |
303 | unsigned stopped = ep->stopped; | |
304 | ||
305 | list_del_init(&req->queue); | |
306 | ||
307 | if (likely(req->req.status == -EINPROGRESS)) | |
308 | req->req.status = status; | |
309 | else | |
310 | status = req->req.status; | |
311 | ||
312 | dev = ep->dev; | |
313 | if (req->mapped) { | |
314 | pci_unmap_single(dev->pdev, req->req.dma, req->req.length, | |
315 | ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); | |
316 | req->req.dma = DMA_ADDR_INVALID; | |
317 | req->mapped = 0; | |
318 | } | |
319 | ||
320 | #ifndef USB_TRACE | |
321 | if (status && status != -ESHUTDOWN) | |
322 | #endif | |
323 | VDBG(dev, "complete %s req %p stat %d len %u/%u\n", | |
324 | ep->ep.name, &req->req, status, | |
325 | req->req.actual, req->req.length); | |
326 | ||
327 | /* don't modify queue heads during completion callback */ | |
328 | ep->stopped = 1; | |
329 | spin_unlock(&dev->lock); | |
330 | req->req.complete(&ep->ep, &req->req); | |
331 | spin_lock(&dev->lock); | |
332 | ep->stopped = stopped; | |
333 | } | |
334 | ||
335 | /*-------------------------------------------------------------------------*/ | |
336 | ||
337 | static inline int | |
338 | write_packet(u32 __iomem *fifo, u8 *buf, struct goku_request *req, unsigned max) | |
339 | { | |
340 | unsigned length, count; | |
341 | ||
342 | length = min(req->req.length - req->req.actual, max); | |
343 | req->req.actual += length; | |
344 | ||
345 | count = length; | |
346 | while (likely(count--)) | |
347 | writel(*buf++, fifo); | |
348 | return length; | |
349 | } | |
350 | ||
351 | // return: 0 = still running, 1 = completed, negative = errno | |
352 | static int write_fifo(struct goku_ep *ep, struct goku_request *req) | |
353 | { | |
354 | struct goku_udc *dev = ep->dev; | |
355 | u32 tmp; | |
356 | u8 *buf; | |
357 | unsigned count; | |
358 | int is_last; | |
359 | ||
360 | tmp = readl(&dev->regs->DataSet); | |
361 | buf = req->req.buf + req->req.actual; | |
362 | prefetch(buf); | |
363 | ||
364 | dev = ep->dev; | |
365 | if (unlikely(ep->num == 0 && dev->ep0state != EP0_IN)) | |
366 | return -EL2HLT; | |
367 | ||
368 | /* NOTE: just single-buffered PIO-IN for now. */ | |
369 | if (unlikely((tmp & DATASET_A(ep->num)) != 0)) | |
370 | return 0; | |
371 | ||
372 | /* clear our "packet available" irq */ | |
373 | if (ep->num != 0) | |
374 | writel(~INT_EPxDATASET(ep->num), &dev->regs->int_status); | |
375 | ||
376 | count = write_packet(ep->reg_fifo, buf, req, ep->ep.maxpacket); | |
377 | ||
378 | /* last packet often short (sometimes a zlp, especially on ep0) */ | |
379 | if (unlikely(count != ep->ep.maxpacket)) { | |
380 | writel(~(1<<ep->num), &dev->regs->EOP); | |
381 | if (ep->num == 0) { | |
382 | dev->ep[0].stopped = 1; | |
383 | dev->ep0state = EP0_STATUS; | |
384 | } | |
385 | is_last = 1; | |
386 | } else { | |
387 | if (likely(req->req.length != req->req.actual) | |
388 | || req->req.zero) | |
389 | is_last = 0; | |
390 | else | |
391 | is_last = 1; | |
392 | } | |
393 | #if 0 /* printk seemed to trash is_last...*/ | |
394 | //#ifdef USB_TRACE | |
395 | VDBG(dev, "wrote %s %u bytes%s IN %u left %p\n", | |
396 | ep->ep.name, count, is_last ? "/last" : "", | |
397 | req->req.length - req->req.actual, req); | |
398 | #endif | |
399 | ||
400 | /* requests complete when all IN data is in the FIFO, | |
401 | * or sometimes later, if a zlp was needed. | |
402 | */ | |
403 | if (is_last) { | |
404 | done(ep, req, 0); | |
405 | return 1; | |
406 | } | |
407 | ||
408 | return 0; | |
409 | } | |
410 | ||
411 | static int read_fifo(struct goku_ep *ep, struct goku_request *req) | |
412 | { | |
413 | struct goku_udc_regs __iomem *regs; | |
414 | u32 size, set; | |
415 | u8 *buf; | |
416 | unsigned bufferspace, is_short, dbuff; | |
417 | ||
418 | regs = ep->dev->regs; | |
419 | top: | |
420 | buf = req->req.buf + req->req.actual; | |
421 | prefetchw(buf); | |
422 | ||
423 | if (unlikely(ep->num == 0 && ep->dev->ep0state != EP0_OUT)) | |
424 | return -EL2HLT; | |
425 | ||
426 | dbuff = (ep->num == 1 || ep->num == 2); | |
427 | do { | |
428 | /* ack dataset irq matching the status we'll handle */ | |
429 | if (ep->num != 0) | |
430 | writel(~INT_EPxDATASET(ep->num), ®s->int_status); | |
431 | ||
432 | set = readl(®s->DataSet) & DATASET_AB(ep->num); | |
433 | size = readl(®s->EPxSizeLA[ep->num]); | |
434 | bufferspace = req->req.length - req->req.actual; | |
435 | ||
436 | /* usually do nothing without an OUT packet */ | |
437 | if (likely(ep->num != 0 || bufferspace != 0)) { | |
438 | if (unlikely(set == 0)) | |
439 | break; | |
440 | /* use ep1/ep2 double-buffering for OUT */ | |
441 | if (!(size & PACKET_ACTIVE)) | |
442 | size = readl(®s->EPxSizeLB[ep->num]); | |
443 | if (!(size & PACKET_ACTIVE)) // "can't happen" | |
444 | break; | |
445 | size &= DATASIZE; /* EPxSizeH == 0 */ | |
446 | ||
447 | /* ep0out no-out-data case for set_config, etc */ | |
448 | } else | |
449 | size = 0; | |
450 | ||
451 | /* read all bytes from this packet */ | |
452 | req->req.actual += size; | |
453 | is_short = (size < ep->ep.maxpacket); | |
454 | #ifdef USB_TRACE | |
455 | VDBG(ep->dev, "read %s %u bytes%s OUT req %p %u/%u\n", | |
456 | ep->ep.name, size, is_short ? "/S" : "", | |
457 | req, req->req.actual, req->req.length); | |
458 | #endif | |
459 | while (likely(size-- != 0)) { | |
460 | u8 byte = (u8) readl(ep->reg_fifo); | |
461 | ||
462 | if (unlikely(bufferspace == 0)) { | |
463 | /* this happens when the driver's buffer | |
464 | * is smaller than what the host sent. | |
465 | * discard the extra data in this packet. | |
466 | */ | |
467 | if (req->req.status != -EOVERFLOW) | |
468 | DBG(ep->dev, "%s overflow %u\n", | |
469 | ep->ep.name, size); | |
470 | req->req.status = -EOVERFLOW; | |
471 | } else { | |
472 | *buf++ = byte; | |
473 | bufferspace--; | |
474 | } | |
475 | } | |
476 | ||
477 | /* completion */ | |
478 | if (unlikely(is_short || req->req.actual == req->req.length)) { | |
479 | if (unlikely(ep->num == 0)) { | |
480 | /* non-control endpoints now usable? */ | |
481 | if (ep->dev->req_config) | |
482 | writel(ep->dev->configured | |
483 | ? USBSTATE_CONFIGURED | |
484 | : 0, | |
485 | ®s->UsbState); | |
486 | /* ep0out status stage */ | |
487 | writel(~(1<<0), ®s->EOP); | |
488 | ep->stopped = 1; | |
489 | ep->dev->ep0state = EP0_STATUS; | |
490 | } | |
491 | done(ep, req, 0); | |
492 | ||
493 | /* empty the second buffer asap */ | |
494 | if (dbuff && !list_empty(&ep->queue)) { | |
495 | req = list_entry(ep->queue.next, | |
496 | struct goku_request, queue); | |
497 | goto top; | |
498 | } | |
499 | return 1; | |
500 | } | |
501 | } while (dbuff); | |
502 | return 0; | |
503 | } | |
504 | ||
505 | static inline void | |
506 | pio_irq_enable(struct goku_udc *dev, | |
507 | struct goku_udc_regs __iomem *regs, int epnum) | |
508 | { | |
509 | dev->int_enable |= INT_EPxDATASET (epnum); | |
510 | writel(dev->int_enable, ®s->int_enable); | |
511 | /* write may still be posted */ | |
512 | } | |
513 | ||
514 | static inline void | |
515 | pio_irq_disable(struct goku_udc *dev, | |
516 | struct goku_udc_regs __iomem *regs, int epnum) | |
517 | { | |
518 | dev->int_enable &= ~INT_EPxDATASET (epnum); | |
519 | writel(dev->int_enable, ®s->int_enable); | |
520 | /* write may still be posted */ | |
521 | } | |
522 | ||
523 | static inline void | |
524 | pio_advance(struct goku_ep *ep) | |
525 | { | |
526 | struct goku_request *req; | |
527 | ||
528 | if (unlikely(list_empty (&ep->queue))) | |
529 | return; | |
530 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
531 | (ep->is_in ? write_fifo : read_fifo)(ep, req); | |
532 | } | |
533 | ||
534 | ||
535 | /*-------------------------------------------------------------------------*/ | |
536 | ||
537 | // return: 0 = q running, 1 = q stopped, negative = errno | |
538 | static int start_dma(struct goku_ep *ep, struct goku_request *req) | |
539 | { | |
540 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
541 | u32 master; | |
542 | u32 start = req->req.dma; | |
543 | u32 end = start + req->req.length - 1; | |
544 | ||
545 | master = readl(®s->dma_master) & MST_RW_BITS; | |
546 | ||
547 | /* re-init the bits affecting IN dma; careful with zlps */ | |
548 | if (likely(ep->is_in)) { | |
549 | if (unlikely(master & MST_RD_ENA)) { | |
550 | DBG (ep->dev, "start, IN active dma %03x!!\n", | |
551 | master); | |
552 | // return -EL2HLT; | |
553 | } | |
554 | writel(end, ®s->in_dma_end); | |
555 | writel(start, ®s->in_dma_start); | |
556 | ||
557 | master &= ~MST_R_BITS; | |
558 | if (unlikely(req->req.length == 0)) | |
559 | master = MST_RD_ENA | MST_RD_EOPB; | |
560 | else if ((req->req.length % ep->ep.maxpacket) != 0 | |
561 | || req->req.zero) | |
562 | master = MST_RD_ENA | MST_EOPB_ENA; | |
563 | else | |
564 | master = MST_RD_ENA | MST_EOPB_DIS; | |
565 | ||
566 | ep->dev->int_enable |= INT_MSTRDEND; | |
567 | ||
568 | /* Goku DMA-OUT merges short packets, which plays poorly with | |
569 | * protocols where short packets mark the transfer boundaries. | |
570 | * The chip supports a nonstandard policy with INT_MSTWRTMOUT, | |
571 | * ending transfers after 3 SOFs; we don't turn it on. | |
572 | */ | |
573 | } else { | |
574 | if (unlikely(master & MST_WR_ENA)) { | |
575 | DBG (ep->dev, "start, OUT active dma %03x!!\n", | |
576 | master); | |
577 | // return -EL2HLT; | |
578 | } | |
579 | writel(end, ®s->out_dma_end); | |
580 | writel(start, ®s->out_dma_start); | |
581 | ||
582 | master &= ~MST_W_BITS; | |
583 | master |= MST_WR_ENA | MST_TIMEOUT_DIS; | |
584 | ||
585 | ep->dev->int_enable |= INT_MSTWREND|INT_MSTWRTMOUT; | |
586 | } | |
587 | ||
588 | writel(master, ®s->dma_master); | |
589 | writel(ep->dev->int_enable, ®s->int_enable); | |
590 | return 0; | |
591 | } | |
592 | ||
593 | static void dma_advance(struct goku_udc *dev, struct goku_ep *ep) | |
594 | { | |
595 | struct goku_request *req; | |
596 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
597 | u32 master; | |
598 | ||
599 | master = readl(®s->dma_master); | |
600 | ||
601 | if (unlikely(list_empty(&ep->queue))) { | |
602 | stop: | |
603 | if (ep->is_in) | |
604 | dev->int_enable &= ~INT_MSTRDEND; | |
605 | else | |
606 | dev->int_enable &= ~(INT_MSTWREND|INT_MSTWRTMOUT); | |
607 | writel(dev->int_enable, ®s->int_enable); | |
608 | return; | |
609 | } | |
610 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
611 | ||
612 | /* normal hw dma completion (not abort) */ | |
613 | if (likely(ep->is_in)) { | |
614 | if (unlikely(master & MST_RD_ENA)) | |
615 | return; | |
616 | req->req.actual = readl(®s->in_dma_current); | |
617 | } else { | |
618 | if (unlikely(master & MST_WR_ENA)) | |
619 | return; | |
620 | ||
621 | /* hardware merges short packets, and also hides packet | |
622 | * overruns. a partial packet MAY be in the fifo here. | |
623 | */ | |
624 | req->req.actual = readl(®s->out_dma_current); | |
625 | } | |
626 | req->req.actual -= req->req.dma; | |
627 | req->req.actual++; | |
628 | ||
629 | #ifdef USB_TRACE | |
630 | VDBG(dev, "done %s %s dma, %u/%u bytes, req %p\n", | |
631 | ep->ep.name, ep->is_in ? "IN" : "OUT", | |
632 | req->req.actual, req->req.length, req); | |
633 | #endif | |
634 | done(ep, req, 0); | |
635 | if (list_empty(&ep->queue)) | |
636 | goto stop; | |
637 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
638 | (void) start_dma(ep, req); | |
639 | } | |
640 | ||
641 | static void abort_dma(struct goku_ep *ep, int status) | |
642 | { | |
643 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
644 | struct goku_request *req; | |
645 | u32 curr, master; | |
646 | ||
647 | /* NAK future host requests, hoping the implicit delay lets the | |
648 | * dma engine finish reading (or writing) its latest packet and | |
649 | * empty the dma buffer (up to 16 bytes). | |
650 | * | |
651 | * This avoids needing to clean up a partial packet in the fifo; | |
652 | * we can't do that for IN without side effects to HALT and TOGGLE. | |
653 | */ | |
654 | command(regs, COMMAND_FIFO_DISABLE, ep->num); | |
655 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
656 | master = readl(®s->dma_master) & MST_RW_BITS; | |
657 | ||
658 | /* FIXME using these resets isn't usably documented. this may | |
659 | * not work unless it's followed by disabling the endpoint. | |
660 | * | |
661 | * FIXME the OUT reset path doesn't even behave consistently. | |
662 | */ | |
663 | if (ep->is_in) { | |
664 | if (unlikely((readl(®s->dma_master) & MST_RD_ENA) == 0)) | |
665 | goto finished; | |
666 | curr = readl(®s->in_dma_current); | |
667 | ||
668 | writel(curr, ®s->in_dma_end); | |
669 | writel(curr, ®s->in_dma_start); | |
670 | ||
671 | master &= ~MST_R_BITS; | |
672 | master |= MST_RD_RESET; | |
673 | writel(master, ®s->dma_master); | |
674 | ||
675 | if (readl(®s->dma_master) & MST_RD_ENA) | |
676 | DBG(ep->dev, "IN dma active after reset!\n"); | |
677 | ||
678 | } else { | |
679 | if (unlikely((readl(®s->dma_master) & MST_WR_ENA) == 0)) | |
680 | goto finished; | |
681 | curr = readl(®s->out_dma_current); | |
682 | ||
683 | writel(curr, ®s->out_dma_end); | |
684 | writel(curr, ®s->out_dma_start); | |
685 | ||
686 | master &= ~MST_W_BITS; | |
687 | master |= MST_WR_RESET; | |
688 | writel(master, ®s->dma_master); | |
689 | ||
690 | if (readl(®s->dma_master) & MST_WR_ENA) | |
691 | DBG(ep->dev, "OUT dma active after reset!\n"); | |
692 | } | |
693 | req->req.actual = (curr - req->req.dma) + 1; | |
694 | req->req.status = status; | |
695 | ||
696 | VDBG(ep->dev, "%s %s %s %d/%d\n", __FUNCTION__, ep->ep.name, | |
697 | ep->is_in ? "IN" : "OUT", | |
698 | req->req.actual, req->req.length); | |
699 | ||
700 | command(regs, COMMAND_FIFO_ENABLE, ep->num); | |
701 | ||
702 | return; | |
703 | ||
704 | finished: | |
705 | /* dma already completed; no abort needed */ | |
706 | command(regs, COMMAND_FIFO_ENABLE, ep->num); | |
707 | req->req.actual = req->req.length; | |
708 | req->req.status = 0; | |
709 | } | |
710 | ||
711 | /*-------------------------------------------------------------------------*/ | |
712 | ||
713 | static int | |
55016f10 | 714 | goku_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) |
1da177e4 LT |
715 | { |
716 | struct goku_request *req; | |
717 | struct goku_ep *ep; | |
718 | struct goku_udc *dev; | |
719 | unsigned long flags; | |
720 | int status; | |
721 | ||
722 | /* always require a cpu-view buffer so pio works */ | |
723 | req = container_of(_req, struct goku_request, req); | |
724 | if (unlikely(!_req || !_req->complete | |
725 | || !_req->buf || !list_empty(&req->queue))) | |
726 | return -EINVAL; | |
727 | ep = container_of(_ep, struct goku_ep, ep); | |
728 | if (unlikely(!_ep || (!ep->desc && ep->num != 0))) | |
729 | return -EINVAL; | |
730 | dev = ep->dev; | |
731 | if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) | |
732 | return -ESHUTDOWN; | |
733 | ||
734 | /* can't touch registers when suspended */ | |
735 | if (dev->ep0state == EP0_SUSPEND) | |
736 | return -EBUSY; | |
737 | ||
738 | /* set up dma mapping in case the caller didn't */ | |
739 | if (ep->dma && _req->dma == DMA_ADDR_INVALID) { | |
740 | _req->dma = pci_map_single(dev->pdev, _req->buf, _req->length, | |
741 | ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); | |
742 | req->mapped = 1; | |
743 | } | |
744 | ||
745 | #ifdef USB_TRACE | |
746 | VDBG(dev, "%s queue req %p, len %u buf %p\n", | |
747 | _ep->name, _req, _req->length, _req->buf); | |
748 | #endif | |
749 | ||
750 | spin_lock_irqsave(&dev->lock, flags); | |
751 | ||
752 | _req->status = -EINPROGRESS; | |
753 | _req->actual = 0; | |
754 | ||
755 | /* for ep0 IN without premature status, zlp is required and | |
756 | * writing EOP starts the status stage (OUT). | |
757 | */ | |
758 | if (unlikely(ep->num == 0 && ep->is_in)) | |
759 | _req->zero = 1; | |
760 | ||
761 | /* kickstart this i/o queue? */ | |
762 | status = 0; | |
763 | if (list_empty(&ep->queue) && likely(!ep->stopped)) { | |
764 | /* dma: done after dma completion IRQ (or error) | |
765 | * pio: done after last fifo operation | |
766 | */ | |
767 | if (ep->dma) | |
768 | status = start_dma(ep, req); | |
769 | else | |
770 | status = (ep->is_in ? write_fifo : read_fifo)(ep, req); | |
771 | ||
772 | if (unlikely(status != 0)) { | |
773 | if (status > 0) | |
774 | status = 0; | |
775 | req = NULL; | |
776 | } | |
777 | ||
778 | } /* else pio or dma irq handler advances the queue. */ | |
779 | ||
780 | if (likely(req != 0)) | |
781 | list_add_tail(&req->queue, &ep->queue); | |
782 | ||
783 | if (likely(!list_empty(&ep->queue)) | |
784 | && likely(ep->num != 0) | |
785 | && !ep->dma | |
786 | && !(dev->int_enable & INT_EPxDATASET (ep->num))) | |
787 | pio_irq_enable(dev, dev->regs, ep->num); | |
788 | ||
789 | spin_unlock_irqrestore(&dev->lock, flags); | |
790 | ||
791 | /* pci writes may still be posted */ | |
792 | return status; | |
793 | } | |
794 | ||
795 | /* dequeue ALL requests */ | |
796 | static void nuke(struct goku_ep *ep, int status) | |
797 | { | |
798 | struct goku_request *req; | |
799 | ||
800 | ep->stopped = 1; | |
801 | if (list_empty(&ep->queue)) | |
802 | return; | |
803 | if (ep->dma) | |
804 | abort_dma(ep, status); | |
805 | while (!list_empty(&ep->queue)) { | |
806 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
807 | done(ep, req, status); | |
808 | } | |
809 | } | |
810 | ||
811 | /* dequeue JUST ONE request */ | |
812 | static int goku_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
813 | { | |
814 | struct goku_request *req; | |
815 | struct goku_ep *ep; | |
816 | struct goku_udc *dev; | |
817 | unsigned long flags; | |
818 | ||
819 | ep = container_of(_ep, struct goku_ep, ep); | |
820 | if (!_ep || !_req || (!ep->desc && ep->num != 0)) | |
821 | return -EINVAL; | |
822 | dev = ep->dev; | |
823 | if (!dev->driver) | |
824 | return -ESHUTDOWN; | |
825 | ||
826 | /* we can't touch (dma) registers when suspended */ | |
827 | if (dev->ep0state == EP0_SUSPEND) | |
828 | return -EBUSY; | |
829 | ||
830 | VDBG(dev, "%s %s %s %s %p\n", __FUNCTION__, _ep->name, | |
831 | ep->is_in ? "IN" : "OUT", | |
832 | ep->dma ? "dma" : "pio", | |
833 | _req); | |
834 | ||
835 | spin_lock_irqsave(&dev->lock, flags); | |
836 | ||
837 | /* make sure it's actually queued on this endpoint */ | |
838 | list_for_each_entry (req, &ep->queue, queue) { | |
839 | if (&req->req == _req) | |
840 | break; | |
841 | } | |
842 | if (&req->req != _req) { | |
843 | spin_unlock_irqrestore (&dev->lock, flags); | |
844 | return -EINVAL; | |
845 | } | |
846 | ||
847 | if (ep->dma && ep->queue.next == &req->queue && !ep->stopped) { | |
848 | abort_dma(ep, -ECONNRESET); | |
849 | done(ep, req, -ECONNRESET); | |
850 | dma_advance(dev, ep); | |
851 | } else if (!list_empty(&req->queue)) | |
852 | done(ep, req, -ECONNRESET); | |
853 | else | |
854 | req = NULL; | |
855 | spin_unlock_irqrestore(&dev->lock, flags); | |
856 | ||
857 | return req ? 0 : -EOPNOTSUPP; | |
858 | } | |
859 | ||
860 | /*-------------------------------------------------------------------------*/ | |
861 | ||
862 | static void goku_clear_halt(struct goku_ep *ep) | |
863 | { | |
864 | // assert (ep->num !=0) | |
865 | VDBG(ep->dev, "%s clear halt\n", ep->ep.name); | |
866 | command(ep->dev->regs, COMMAND_SETDATA0, ep->num); | |
867 | command(ep->dev->regs, COMMAND_STALL_CLEAR, ep->num); | |
868 | if (ep->stopped) { | |
869 | ep->stopped = 0; | |
870 | if (ep->dma) { | |
871 | struct goku_request *req; | |
872 | ||
873 | if (list_empty(&ep->queue)) | |
874 | return; | |
875 | req = list_entry(ep->queue.next, struct goku_request, | |
876 | queue); | |
877 | (void) start_dma(ep, req); | |
878 | } else | |
879 | pio_advance(ep); | |
880 | } | |
881 | } | |
882 | ||
883 | static int goku_set_halt(struct usb_ep *_ep, int value) | |
884 | { | |
885 | struct goku_ep *ep; | |
886 | unsigned long flags; | |
887 | int retval = 0; | |
888 | ||
889 | if (!_ep) | |
890 | return -ENODEV; | |
891 | ep = container_of (_ep, struct goku_ep, ep); | |
892 | ||
893 | if (ep->num == 0) { | |
894 | if (value) { | |
895 | ep->dev->ep0state = EP0_STALL; | |
896 | ep->dev->ep[0].stopped = 1; | |
897 | } else | |
898 | return -EINVAL; | |
899 | ||
900 | /* don't change EPxSTATUS_EP_INVALID to READY */ | |
901 | } else if (!ep->desc) { | |
902 | DBG(ep->dev, "%s %s inactive?\n", __FUNCTION__, ep->ep.name); | |
903 | return -EINVAL; | |
904 | } | |
905 | ||
906 | spin_lock_irqsave(&ep->dev->lock, flags); | |
907 | if (!list_empty(&ep->queue)) | |
908 | retval = -EAGAIN; | |
909 | else if (ep->is_in && value | |
910 | /* data in (either) packet buffer? */ | |
911 | && (readl(&ep->dev->regs->DataSet) | |
912 | & DATASET_AB(ep->num))) | |
913 | retval = -EAGAIN; | |
914 | else if (!value) | |
915 | goku_clear_halt(ep); | |
916 | else { | |
917 | ep->stopped = 1; | |
918 | VDBG(ep->dev, "%s set halt\n", ep->ep.name); | |
919 | command(ep->dev->regs, COMMAND_STALL, ep->num); | |
920 | readl(ep->reg_status); | |
921 | } | |
922 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
923 | return retval; | |
924 | } | |
925 | ||
926 | static int goku_fifo_status(struct usb_ep *_ep) | |
927 | { | |
928 | struct goku_ep *ep; | |
929 | struct goku_udc_regs __iomem *regs; | |
930 | u32 size; | |
931 | ||
932 | if (!_ep) | |
933 | return -ENODEV; | |
934 | ep = container_of(_ep, struct goku_ep, ep); | |
935 | ||
936 | /* size is only reported sanely for OUT */ | |
937 | if (ep->is_in) | |
938 | return -EOPNOTSUPP; | |
939 | ||
940 | /* ignores 16-byte dma buffer; SizeH == 0 */ | |
941 | regs = ep->dev->regs; | |
942 | size = readl(®s->EPxSizeLA[ep->num]) & DATASIZE; | |
943 | size += readl(®s->EPxSizeLB[ep->num]) & DATASIZE; | |
944 | VDBG(ep->dev, "%s %s %u\n", __FUNCTION__, ep->ep.name, size); | |
945 | return size; | |
946 | } | |
947 | ||
948 | static void goku_fifo_flush(struct usb_ep *_ep) | |
949 | { | |
950 | struct goku_ep *ep; | |
951 | struct goku_udc_regs __iomem *regs; | |
952 | u32 size; | |
953 | ||
954 | if (!_ep) | |
955 | return; | |
956 | ep = container_of(_ep, struct goku_ep, ep); | |
957 | VDBG(ep->dev, "%s %s\n", __FUNCTION__, ep->ep.name); | |
958 | ||
959 | /* don't change EPxSTATUS_EP_INVALID to READY */ | |
960 | if (!ep->desc && ep->num != 0) { | |
961 | DBG(ep->dev, "%s %s inactive?\n", __FUNCTION__, ep->ep.name); | |
962 | return; | |
963 | } | |
964 | ||
965 | regs = ep->dev->regs; | |
966 | size = readl(®s->EPxSizeLA[ep->num]); | |
967 | size &= DATASIZE; | |
968 | ||
969 | /* Non-desirable behavior: FIFO_CLEAR also clears the | |
970 | * endpoint halt feature. For OUT, we _could_ just read | |
971 | * the bytes out (PIO, if !ep->dma); for in, no choice. | |
972 | */ | |
973 | if (size) | |
974 | command(regs, COMMAND_FIFO_CLEAR, ep->num); | |
975 | } | |
976 | ||
977 | static struct usb_ep_ops goku_ep_ops = { | |
978 | .enable = goku_ep_enable, | |
979 | .disable = goku_ep_disable, | |
980 | ||
981 | .alloc_request = goku_alloc_request, | |
982 | .free_request = goku_free_request, | |
983 | ||
1da177e4 LT |
984 | .queue = goku_queue, |
985 | .dequeue = goku_dequeue, | |
986 | ||
987 | .set_halt = goku_set_halt, | |
988 | .fifo_status = goku_fifo_status, | |
989 | .fifo_flush = goku_fifo_flush, | |
990 | }; | |
991 | ||
992 | /*-------------------------------------------------------------------------*/ | |
993 | ||
994 | static int goku_get_frame(struct usb_gadget *_gadget) | |
995 | { | |
996 | return -EOPNOTSUPP; | |
997 | } | |
998 | ||
999 | static const struct usb_gadget_ops goku_ops = { | |
1000 | .get_frame = goku_get_frame, | |
1001 | // no remote wakeup | |
1002 | // not selfpowered | |
1003 | }; | |
1004 | ||
1005 | /*-------------------------------------------------------------------------*/ | |
1006 | ||
1007 | static inline char *dmastr(void) | |
1008 | { | |
1009 | if (use_dma == 0) | |
1010 | return "(dma disabled)"; | |
1011 | else if (use_dma == 2) | |
1012 | return "(dma IN and OUT)"; | |
1013 | else | |
1014 | return "(dma IN)"; | |
1015 | } | |
1016 | ||
1017 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
1018 | ||
1019 | static const char proc_node_name [] = "driver/udc"; | |
1020 | ||
1021 | #define FOURBITS "%s%s%s%s" | |
1022 | #define EIGHTBITS FOURBITS FOURBITS | |
1023 | ||
1024 | static void | |
1025 | dump_intmask(const char *label, u32 mask, char **next, unsigned *size) | |
1026 | { | |
1027 | int t; | |
1028 | ||
1029 | /* int_status is the same format ... */ | |
1030 | t = scnprintf(*next, *size, | |
1031 | "%s %05X =" FOURBITS EIGHTBITS EIGHTBITS "\n", | |
1032 | label, mask, | |
1033 | (mask & INT_PWRDETECT) ? " power" : "", | |
1034 | (mask & INT_SYSERROR) ? " sys" : "", | |
1035 | (mask & INT_MSTRDEND) ? " in-dma" : "", | |
1036 | (mask & INT_MSTWRTMOUT) ? " wrtmo" : "", | |
1037 | ||
1038 | (mask & INT_MSTWREND) ? " out-dma" : "", | |
1039 | (mask & INT_MSTWRSET) ? " wrset" : "", | |
1040 | (mask & INT_ERR) ? " err" : "", | |
1041 | (mask & INT_SOF) ? " sof" : "", | |
1042 | ||
1043 | (mask & INT_EP3NAK) ? " ep3nak" : "", | |
1044 | (mask & INT_EP2NAK) ? " ep2nak" : "", | |
1045 | (mask & INT_EP1NAK) ? " ep1nak" : "", | |
1046 | (mask & INT_EP3DATASET) ? " ep3" : "", | |
1047 | ||
1048 | (mask & INT_EP2DATASET) ? " ep2" : "", | |
1049 | (mask & INT_EP1DATASET) ? " ep1" : "", | |
1050 | (mask & INT_STATUSNAK) ? " ep0snak" : "", | |
1051 | (mask & INT_STATUS) ? " ep0status" : "", | |
1052 | ||
1053 | (mask & INT_SETUP) ? " setup" : "", | |
1054 | (mask & INT_ENDPOINT0) ? " ep0" : "", | |
1055 | (mask & INT_USBRESET) ? " reset" : "", | |
1056 | (mask & INT_SUSPEND) ? " suspend" : ""); | |
1057 | *size -= t; | |
1058 | *next += t; | |
1059 | } | |
1060 | ||
1061 | ||
1062 | static int | |
1063 | udc_proc_read(char *buffer, char **start, off_t off, int count, | |
1064 | int *eof, void *_dev) | |
1065 | { | |
1066 | char *buf = buffer; | |
1067 | struct goku_udc *dev = _dev; | |
1068 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1069 | char *next = buf; | |
1070 | unsigned size = count; | |
1071 | unsigned long flags; | |
1072 | int i, t, is_usb_connected; | |
1073 | u32 tmp; | |
1074 | ||
1075 | if (off != 0) | |
1076 | return 0; | |
1077 | ||
1078 | local_irq_save(flags); | |
1079 | ||
1080 | /* basic device status */ | |
1081 | tmp = readl(®s->power_detect); | |
1082 | is_usb_connected = tmp & PW_DETECT; | |
1083 | t = scnprintf(next, size, | |
1084 | "%s - %s\n" | |
1085 | "%s version: %s %s\n" | |
1086 | "Gadget driver: %s\n" | |
1087 | "Host %s, %s\n" | |
1088 | "\n", | |
1089 | pci_name(dev->pdev), driver_desc, | |
1090 | driver_name, DRIVER_VERSION, dmastr(), | |
1091 | dev->driver ? dev->driver->driver.name : "(none)", | |
1092 | is_usb_connected | |
1093 | ? ((tmp & PW_PULLUP) ? "full speed" : "powered") | |
1094 | : "disconnected", | |
1095 | ({char *tmp; | |
1096 | switch(dev->ep0state){ | |
1097 | case EP0_DISCONNECT: tmp = "ep0_disconnect"; break; | |
1098 | case EP0_IDLE: tmp = "ep0_idle"; break; | |
1099 | case EP0_IN: tmp = "ep0_in"; break; | |
1100 | case EP0_OUT: tmp = "ep0_out"; break; | |
1101 | case EP0_STATUS: tmp = "ep0_status"; break; | |
1102 | case EP0_STALL: tmp = "ep0_stall"; break; | |
1103 | case EP0_SUSPEND: tmp = "ep0_suspend"; break; | |
1104 | default: tmp = "ep0_?"; break; | |
1105 | } tmp; }) | |
1106 | ); | |
1107 | size -= t; | |
1108 | next += t; | |
1109 | ||
1110 | dump_intmask("int_status", readl(®s->int_status), &next, &size); | |
1111 | dump_intmask("int_enable", readl(®s->int_enable), &next, &size); | |
1112 | ||
1113 | if (!is_usb_connected || !dev->driver || (tmp & PW_PULLUP) == 0) | |
1114 | goto done; | |
1115 | ||
1116 | /* registers for (active) device and ep0 */ | |
1117 | t = scnprintf(next, size, "\nirqs %lu\ndataset %02x " | |
1118 | "single.bcs %02x.%02x state %x addr %u\n", | |
1119 | dev->irqs, readl(®s->DataSet), | |
1120 | readl(®s->EPxSingle), readl(®s->EPxBCS), | |
1121 | readl(®s->UsbState), | |
1122 | readl(®s->address)); | |
1123 | size -= t; | |
1124 | next += t; | |
1125 | ||
1126 | tmp = readl(®s->dma_master); | |
1127 | t = scnprintf(next, size, | |
1128 | "dma %03X =" EIGHTBITS "%s %s\n", tmp, | |
1129 | (tmp & MST_EOPB_DIS) ? " eopb-" : "", | |
1130 | (tmp & MST_EOPB_ENA) ? " eopb+" : "", | |
1131 | (tmp & MST_TIMEOUT_DIS) ? " tmo-" : "", | |
1132 | (tmp & MST_TIMEOUT_ENA) ? " tmo+" : "", | |
1133 | ||
1134 | (tmp & MST_RD_EOPB) ? " eopb" : "", | |
1135 | (tmp & MST_RD_RESET) ? " in_reset" : "", | |
1136 | (tmp & MST_WR_RESET) ? " out_reset" : "", | |
1137 | (tmp & MST_RD_ENA) ? " IN" : "", | |
1138 | ||
1139 | (tmp & MST_WR_ENA) ? " OUT" : "", | |
1140 | (tmp & MST_CONNECTION) | |
1141 | ? "ep1in/ep2out" | |
1142 | : "ep1out/ep2in"); | |
1143 | size -= t; | |
1144 | next += t; | |
1145 | ||
1146 | /* dump endpoint queues */ | |
1147 | for (i = 0; i < 4; i++) { | |
1148 | struct goku_ep *ep = &dev->ep [i]; | |
1149 | struct goku_request *req; | |
1150 | int t; | |
1151 | ||
1152 | if (i && !ep->desc) | |
1153 | continue; | |
1154 | ||
1155 | tmp = readl(ep->reg_status); | |
1156 | t = scnprintf(next, size, | |
1157 | "%s %s max %u %s, irqs %lu, " | |
1158 | "status %02x (%s) " FOURBITS "\n", | |
1159 | ep->ep.name, | |
1160 | ep->is_in ? "in" : "out", | |
1161 | ep->ep.maxpacket, | |
1162 | ep->dma ? "dma" : "pio", | |
1163 | ep->irqs, | |
1164 | tmp, ({ char *s; | |
1165 | switch (tmp & EPxSTATUS_EP_MASK) { | |
1166 | case EPxSTATUS_EP_READY: | |
1167 | s = "ready"; break; | |
1168 | case EPxSTATUS_EP_DATAIN: | |
1169 | s = "packet"; break; | |
1170 | case EPxSTATUS_EP_FULL: | |
1171 | s = "full"; break; | |
1172 | case EPxSTATUS_EP_TX_ERR: // host will retry | |
1173 | s = "tx_err"; break; | |
1174 | case EPxSTATUS_EP_RX_ERR: | |
1175 | s = "rx_err"; break; | |
1176 | case EPxSTATUS_EP_BUSY: /* ep0 only */ | |
1177 | s = "busy"; break; | |
1178 | case EPxSTATUS_EP_STALL: | |
1179 | s = "stall"; break; | |
1180 | case EPxSTATUS_EP_INVALID: // these "can't happen" | |
1181 | s = "invalid"; break; | |
1182 | default: | |
1183 | s = "?"; break; | |
1184 | }; s; }), | |
1185 | (tmp & EPxSTATUS_TOGGLE) ? "data1" : "data0", | |
1186 | (tmp & EPxSTATUS_SUSPEND) ? " suspend" : "", | |
1187 | (tmp & EPxSTATUS_FIFO_DISABLE) ? " disable" : "", | |
1188 | (tmp & EPxSTATUS_STAGE_ERROR) ? " ep0stat" : "" | |
1189 | ); | |
1190 | if (t <= 0 || t > size) | |
1191 | goto done; | |
1192 | size -= t; | |
1193 | next += t; | |
1194 | ||
1195 | if (list_empty(&ep->queue)) { | |
1196 | t = scnprintf(next, size, "\t(nothing queued)\n"); | |
1197 | if (t <= 0 || t > size) | |
1198 | goto done; | |
1199 | size -= t; | |
1200 | next += t; | |
1201 | continue; | |
1202 | } | |
1203 | list_for_each_entry(req, &ep->queue, queue) { | |
1204 | if (ep->dma && req->queue.prev == &ep->queue) { | |
1205 | if (i == UDC_MSTRD_ENDPOINT) | |
1206 | tmp = readl(®s->in_dma_current); | |
1207 | else | |
1208 | tmp = readl(®s->out_dma_current); | |
1209 | tmp -= req->req.dma; | |
1210 | tmp++; | |
1211 | } else | |
1212 | tmp = req->req.actual; | |
1213 | ||
1214 | t = scnprintf(next, size, | |
1215 | "\treq %p len %u/%u buf %p\n", | |
1216 | &req->req, tmp, req->req.length, | |
1217 | req->req.buf); | |
1218 | if (t <= 0 || t > size) | |
1219 | goto done; | |
1220 | size -= t; | |
1221 | next += t; | |
1222 | } | |
1223 | } | |
1224 | ||
1225 | done: | |
1226 | local_irq_restore(flags); | |
1227 | *eof = 1; | |
1228 | return count - size; | |
1229 | } | |
1230 | ||
1231 | #endif /* CONFIG_USB_GADGET_DEBUG_FILES */ | |
1232 | ||
1233 | /*-------------------------------------------------------------------------*/ | |
1234 | ||
1235 | static void udc_reinit (struct goku_udc *dev) | |
1236 | { | |
1237 | static char *names [] = { "ep0", "ep1-bulk", "ep2-bulk", "ep3-bulk" }; | |
1238 | ||
1239 | unsigned i; | |
1240 | ||
1241 | INIT_LIST_HEAD (&dev->gadget.ep_list); | |
1242 | dev->gadget.ep0 = &dev->ep [0].ep; | |
1243 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
1244 | dev->ep0state = EP0_DISCONNECT; | |
1245 | dev->irqs = 0; | |
1246 | ||
1247 | for (i = 0; i < 4; i++) { | |
1248 | struct goku_ep *ep = &dev->ep[i]; | |
1249 | ||
1250 | ep->num = i; | |
1251 | ep->ep.name = names[i]; | |
1252 | ep->reg_fifo = &dev->regs->ep_fifo [i]; | |
1253 | ep->reg_status = &dev->regs->ep_status [i]; | |
1254 | ep->reg_mode = &dev->regs->ep_mode[i]; | |
1255 | ||
1256 | ep->ep.ops = &goku_ep_ops; | |
1257 | list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list); | |
1258 | ep->dev = dev; | |
1259 | INIT_LIST_HEAD (&ep->queue); | |
1260 | ||
1261 | ep_reset(NULL, ep); | |
1262 | } | |
1263 | ||
1264 | dev->ep[0].reg_mode = NULL; | |
1265 | dev->ep[0].ep.maxpacket = MAX_EP0_SIZE; | |
1266 | list_del_init (&dev->ep[0].ep.ep_list); | |
1267 | } | |
1268 | ||
1269 | static void udc_reset(struct goku_udc *dev) | |
1270 | { | |
1271 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1272 | ||
1273 | writel(0, ®s->power_detect); | |
1274 | writel(0, ®s->int_enable); | |
1275 | readl(®s->int_enable); | |
1276 | dev->int_enable = 0; | |
1277 | ||
1278 | /* deassert reset, leave USB D+ at hi-Z (no pullup) | |
1279 | * don't let INT_PWRDETECT sequence begin | |
1280 | */ | |
1281 | udelay(250); | |
1282 | writel(PW_RESETB, ®s->power_detect); | |
1283 | readl(®s->int_enable); | |
1284 | } | |
1285 | ||
1286 | static void ep0_start(struct goku_udc *dev) | |
1287 | { | |
1288 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1289 | unsigned i; | |
1290 | ||
1291 | VDBG(dev, "%s\n", __FUNCTION__); | |
1292 | ||
1293 | udc_reset(dev); | |
1294 | udc_reinit (dev); | |
1295 | //writel(MST_EOPB_ENA | MST_TIMEOUT_ENA, ®s->dma_master); | |
1296 | ||
1297 | /* hw handles set_address, set_feature, get_status; maybe more */ | |
1298 | writel( G_REQMODE_SET_INTF | G_REQMODE_GET_INTF | |
1299 | | G_REQMODE_SET_CONF | G_REQMODE_GET_CONF | |
1300 | | G_REQMODE_GET_DESC | |
1301 | | G_REQMODE_CLEAR_FEAT | |
1302 | , ®s->reqmode); | |
1303 | ||
1304 | for (i = 0; i < 4; i++) | |
1305 | dev->ep[i].irqs = 0; | |
1306 | ||
1307 | /* can't modify descriptors after writing UsbReady */ | |
1308 | for (i = 0; i < DESC_LEN; i++) | |
1309 | writel(0, ®s->descriptors[i]); | |
1310 | writel(0, ®s->UsbReady); | |
1311 | ||
1312 | /* expect ep0 requests when the host drops reset */ | |
1313 | writel(PW_RESETB | PW_PULLUP, ®s->power_detect); | |
1314 | dev->int_enable = INT_DEVWIDE | INT_EP0; | |
1315 | writel(dev->int_enable, &dev->regs->int_enable); | |
1316 | readl(®s->int_enable); | |
1317 | dev->gadget.speed = USB_SPEED_FULL; | |
1318 | dev->ep0state = EP0_IDLE; | |
1319 | } | |
1320 | ||
1321 | static void udc_enable(struct goku_udc *dev) | |
1322 | { | |
1323 | /* start enumeration now, or after power detect irq */ | |
1324 | if (readl(&dev->regs->power_detect) & PW_DETECT) | |
1325 | ep0_start(dev); | |
1326 | else { | |
1327 | DBG(dev, "%s\n", __FUNCTION__); | |
1328 | dev->int_enable = INT_PWRDETECT; | |
1329 | writel(dev->int_enable, &dev->regs->int_enable); | |
1330 | } | |
1331 | } | |
1332 | ||
1333 | /*-------------------------------------------------------------------------*/ | |
1334 | ||
1335 | /* keeping it simple: | |
1336 | * - one bus driver, initted first; | |
1337 | * - one function driver, initted second | |
1338 | */ | |
1339 | ||
1340 | static struct goku_udc *the_controller; | |
1341 | ||
1342 | /* when a driver is successfully registered, it will receive | |
1343 | * control requests including set_configuration(), which enables | |
1344 | * non-control requests. then usb traffic follows until a | |
1345 | * disconnect is reported. then a host may connect again, or | |
1346 | * the driver might get unbound. | |
1347 | */ | |
1348 | int usb_gadget_register_driver(struct usb_gadget_driver *driver) | |
1349 | { | |
1350 | struct goku_udc *dev = the_controller; | |
1351 | int retval; | |
1352 | ||
1353 | if (!driver | |
1354 | || driver->speed != USB_SPEED_FULL | |
1355 | || !driver->bind | |
1da177e4 LT |
1356 | || !driver->disconnect |
1357 | || !driver->setup) | |
1358 | return -EINVAL; | |
1359 | if (!dev) | |
1360 | return -ENODEV; | |
1361 | if (dev->driver) | |
1362 | return -EBUSY; | |
1363 | ||
1364 | /* hook up the driver */ | |
1365 | driver->driver.bus = NULL; | |
1366 | dev->driver = driver; | |
1367 | dev->gadget.dev.driver = &driver->driver; | |
1368 | retval = driver->bind(&dev->gadget); | |
1369 | if (retval) { | |
1370 | DBG(dev, "bind to driver %s --> error %d\n", | |
1371 | driver->driver.name, retval); | |
1372 | dev->driver = NULL; | |
1373 | dev->gadget.dev.driver = NULL; | |
1374 | return retval; | |
1375 | } | |
1376 | ||
1377 | /* then enable host detection and ep0; and we're ready | |
1378 | * for set_configuration as well as eventual disconnect. | |
1379 | */ | |
1380 | udc_enable(dev); | |
1381 | ||
1382 | DBG(dev, "registered gadget driver '%s'\n", driver->driver.name); | |
1383 | return 0; | |
1384 | } | |
1385 | EXPORT_SYMBOL(usb_gadget_register_driver); | |
1386 | ||
1387 | static void | |
1388 | stop_activity(struct goku_udc *dev, struct usb_gadget_driver *driver) | |
1389 | { | |
1390 | unsigned i; | |
1391 | ||
1392 | DBG (dev, "%s\n", __FUNCTION__); | |
1393 | ||
1394 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1395 | driver = NULL; | |
1396 | ||
1397 | /* disconnect gadget driver after quiesceing hw and the driver */ | |
1398 | udc_reset (dev); | |
1399 | for (i = 0; i < 4; i++) | |
1400 | nuke(&dev->ep [i], -ESHUTDOWN); | |
1401 | if (driver) { | |
1402 | spin_unlock(&dev->lock); | |
1403 | driver->disconnect(&dev->gadget); | |
1404 | spin_lock(&dev->lock); | |
1405 | } | |
1406 | ||
1407 | if (dev->driver) | |
1408 | udc_enable(dev); | |
1409 | } | |
1410 | ||
1411 | int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) | |
1412 | { | |
1413 | struct goku_udc *dev = the_controller; | |
1414 | unsigned long flags; | |
1415 | ||
1416 | if (!dev) | |
1417 | return -ENODEV; | |
6bea476c | 1418 | if (!driver || driver != dev->driver || !driver->unbind) |
1da177e4 LT |
1419 | return -EINVAL; |
1420 | ||
1421 | spin_lock_irqsave(&dev->lock, flags); | |
1422 | dev->driver = NULL; | |
1423 | stop_activity(dev, driver); | |
1424 | spin_unlock_irqrestore(&dev->lock, flags); | |
1425 | ||
1426 | driver->unbind(&dev->gadget); | |
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); | |
988199fe DB |
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)); | |
1da177e4 LT |
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: | |
988199fe | 1472 | tmp = le16_to_cpu(ctrl.wIndex) & 0x0f; |
1da177e4 LT |
1473 | /* active endpoint */ |
1474 | if (tmp > 3 || (!dev->ep[tmp].desc && tmp != 0)) | |
1475 | goto stall; | |
988199fe DB |
1476 | if (ctrl.wIndex & __constant_cpu_to_le16( |
1477 | USB_DIR_IN)) { | |
1da177e4 LT |
1478 | if (!dev->ep[tmp].is_in) |
1479 | goto stall; | |
1480 | } else { | |
1481 | if (dev->ep[tmp].is_in) | |
1482 | goto stall; | |
1483 | } | |
988199fe DB |
1484 | if (ctrl.wValue != __constant_cpu_to_le16( |
1485 | USB_ENDPOINT_HALT)) | |
1da177e4 LT |
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 */ | |
988199fe | 1497 | if (ctrl.wValue != __constant_cpu_to_le16(1)) |
1da177e4 LT |
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, | |
988199fe DB |
1515 | le16_to_cpu(ctrl.wValue), le16_to_cpu(ctrl.wIndex), |
1516 | le16_to_cpu(ctrl.wLength)); | |
1da177e4 LT |
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)) | |
988199fe | 1523 | dev->configured = (ctrl.wValue != __constant_cpu_to_le16(0)); |
1da177e4 LT |
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 | ||
7d12e780 | 1551 | static irqreturn_t goku_irq(int irq, void *_dev) |
1da177e4 LT |
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", __FUNCTION__); | |
6bea476c DB |
1731 | |
1732 | BUG_ON(dev->driver); | |
1da177e4 LT |
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 | device_unregister(&dev->gadget.dev); | |
1749 | ||
1750 | pci_set_drvdata(pdev, NULL); | |
1751 | dev->regs = NULL; | |
1752 | the_controller = NULL; | |
1753 | ||
1754 | INFO(dev, "unbind\n"); | |
1755 | } | |
1756 | ||
1757 | /* wrap this driver around the specified pci device, but | |
1758 | * don't respond over USB until a gadget driver binds to us. | |
1759 | */ | |
1760 | ||
1761 | static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id) | |
1762 | { | |
1763 | struct goku_udc *dev = NULL; | |
1764 | unsigned long resource, len; | |
1765 | void __iomem *base = NULL; | |
1766 | int retval; | |
1da177e4 LT |
1767 | |
1768 | /* if you want to support more than one controller in a system, | |
1769 | * usb_gadget_driver_{register,unregister}() must change. | |
1770 | */ | |
1771 | if (the_controller) { | |
1772 | WARN(dev, "ignoring %s\n", pci_name(pdev)); | |
1773 | return -EBUSY; | |
1774 | } | |
1775 | if (!pdev->irq) { | |
1776 | printk(KERN_ERR "Check PCI %s IRQ setup!\n", pci_name(pdev)); | |
1777 | retval = -ENODEV; | |
1778 | goto done; | |
1779 | } | |
1780 | ||
1781 | /* alloc, and start init */ | |
e94b1766 | 1782 | dev = kmalloc (sizeof *dev, GFP_KERNEL); |
1da177e4 LT |
1783 | if (dev == NULL){ |
1784 | pr_debug("enomem %s\n", pci_name(pdev)); | |
1785 | retval = -ENOMEM; | |
1786 | goto done; | |
1787 | } | |
1788 | ||
1789 | memset(dev, 0, sizeof *dev); | |
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 | strcpy(dev->gadget.dev.bus_id, "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 done; | |
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 done; | |
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 done; | |
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()); | |
c6387a48 | 1829 | INFO(dev, "irq %d, pci mem %p\n", pdev->irq, base); |
1da177e4 LT |
1830 | |
1831 | /* init to known state, then setup irqs */ | |
1832 | udc_reset(dev); | |
1833 | udc_reinit (dev); | |
d54b5caa | 1834 | if (request_irq(pdev->irq, goku_irq, IRQF_SHARED/*|IRQF_SAMPLE_RANDOM*/, |
1da177e4 | 1835 | driver_name, dev) != 0) { |
c6387a48 | 1836 | DBG(dev, "request interrupt %d failed\n", pdev->irq); |
1da177e4 LT |
1837 | retval = -EBUSY; |
1838 | goto done; | |
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 | /* done */ | |
1850 | the_controller = dev; | |
1851 | device_register(&dev->gadget.dev); | |
1852 | ||
1853 | return 0; | |
1854 | ||
1855 | done: | |
1856 | if (dev) | |
1857 | goku_remove (pdev); | |
1858 | return retval; | |
1859 | } | |
1860 | ||
1861 | ||
1862 | /*-------------------------------------------------------------------------*/ | |
1863 | ||
1864 | static struct pci_device_id pci_ids [] = { { | |
1865 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), | |
1866 | .class_mask = ~0, | |
1867 | .vendor = 0x102f, /* Toshiba */ | |
1868 | .device = 0x0107, /* this UDC */ | |
1869 | .subvendor = PCI_ANY_ID, | |
1870 | .subdevice = PCI_ANY_ID, | |
1871 | ||
1872 | }, { /* end: all zeroes */ } | |
1873 | }; | |
1874 | MODULE_DEVICE_TABLE (pci, pci_ids); | |
1875 | ||
1876 | static struct pci_driver goku_pci_driver = { | |
1877 | .name = (char *) driver_name, | |
1878 | .id_table = pci_ids, | |
1879 | ||
1880 | .probe = goku_probe, | |
1881 | .remove = goku_remove, | |
1882 | ||
1883 | /* FIXME add power management support */ | |
1884 | }; | |
1885 | ||
1886 | static int __init init (void) | |
1887 | { | |
1888 | return pci_register_driver (&goku_pci_driver); | |
1889 | } | |
1890 | module_init (init); | |
1891 | ||
1892 | static void __exit cleanup (void) | |
1893 | { | |
1894 | pci_unregister_driver (&goku_pci_driver); | |
1895 | } | |
1896 | module_exit (cleanup); |