]>
Commit | Line | Data |
---|---|---|
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 LT |
32 | #include <linux/errno.h> |
33 | #include <linux/init.h> | |
34 | #include <linux/timer.h> | |
35 | #include <linux/list.h> | |
36 | #include <linux/interrupt.h> | |
37 | #include <linux/proc_fs.h> | |
38 | #include <linux/device.h> | |
5f848137 | 39 | #include <linux/usb/ch9.h> |
9454a57a | 40 | #include <linux/usb/gadget.h> |
1da177e4 LT |
41 | |
42 | #include <asm/byteorder.h> | |
43 | #include <asm/io.h> | |
44 | #include <asm/irq.h> | |
45 | #include <asm/system.h> | |
46 | #include <asm/unaligned.h> | |
47 | ||
48 | ||
49 | #include "goku_udc.h" | |
50 | ||
51 | #define DRIVER_DESC "TC86C001 USB Device Controller" | |
52 | #define DRIVER_VERSION "30-Oct 2003" | |
53 | ||
54 | #define DMA_ADDR_INVALID (~(dma_addr_t)0) | |
55 | ||
56 | static const char driver_name [] = "goku_udc"; | |
57 | static const char driver_desc [] = DRIVER_DESC; | |
58 | ||
59 | MODULE_AUTHOR("source@mvista.com"); | |
60 | MODULE_DESCRIPTION(DRIVER_DESC); | |
61 | MODULE_LICENSE("GPL"); | |
62 | ||
63 | ||
64 | /* | |
65 | * IN dma behaves ok under testing, though the IN-dma abort paths don't | |
66 | * seem to behave quite as expected. Used by default. | |
67 | * | |
68 | * OUT dma documents design problems handling the common "short packet" | |
988199fe | 69 | * transfer termination policy; it couldn't be enabled by default, even |
1da177e4 LT |
70 | * if the OUT-dma abort problems had a resolution. |
71 | */ | |
72 | static unsigned use_dma = 1; | |
73 | ||
74 | #if 0 | |
75 | //#include <linux/moduleparam.h> | |
76 | /* "modprobe goku_udc use_dma=1" etc | |
77 | * 0 to disable dma | |
78 | * 1 to use IN dma only (normal operation) | |
79 | * 2 to use IN and OUT dma | |
80 | */ | |
81 | module_param(use_dma, uint, S_IRUGO); | |
82 | #endif | |
83 | ||
84 | /*-------------------------------------------------------------------------*/ | |
85 | ||
86 | static void nuke(struct goku_ep *, int status); | |
87 | ||
88 | static inline void | |
89 | command(struct goku_udc_regs __iomem *regs, int command, unsigned epnum) | |
90 | { | |
91 | writel(COMMAND_EP(epnum) | command, ®s->Command); | |
92 | udelay(300); | |
93 | } | |
94 | ||
95 | static int | |
96 | goku_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) | |
97 | { | |
98 | struct goku_udc *dev; | |
99 | struct goku_ep *ep; | |
100 | u32 mode; | |
101 | u16 max; | |
102 | unsigned long flags; | |
103 | ||
104 | ep = container_of(_ep, struct goku_ep, ep); | |
105 | if (!_ep || !desc || ep->desc | |
106 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
107 | return -EINVAL; | |
108 | dev = ep->dev; | |
109 | if (ep == &dev->ep[0]) | |
110 | return -EINVAL; | |
111 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
112 | return -ESHUTDOWN; | |
113 | if (ep->num != (desc->bEndpointAddress & 0x0f)) | |
114 | return -EINVAL; | |
115 | ||
116 | switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { | |
117 | case USB_ENDPOINT_XFER_BULK: | |
118 | case USB_ENDPOINT_XFER_INT: | |
119 | break; | |
120 | default: | |
121 | return -EINVAL; | |
122 | } | |
123 | ||
124 | if ((readl(ep->reg_status) & EPxSTATUS_EP_MASK) | |
125 | != EPxSTATUS_EP_INVALID) | |
126 | return -EBUSY; | |
127 | ||
128 | /* enabling the no-toggle interrupt mode would need an api hook */ | |
129 | mode = 0; | |
a5abdeaf | 130 | max = get_unaligned_le16(&desc->wMaxPacketSize); |
1da177e4 LT |
131 | switch (max) { |
132 | case 64: mode++; | |
133 | case 32: mode++; | |
134 | case 16: mode++; | |
135 | case 8: mode <<= 3; | |
136 | break; | |
137 | default: | |
138 | return -EINVAL; | |
139 | } | |
140 | mode |= 2 << 1; /* bulk, or intr-with-toggle */ | |
141 | ||
142 | /* ep1/ep2 dma direction is chosen early; it works in the other | |
143 | * direction, with pio. be cautious with out-dma. | |
144 | */ | |
145 | ep->is_in = (USB_DIR_IN & desc->bEndpointAddress) != 0; | |
146 | if (ep->is_in) { | |
147 | mode |= 1; | |
148 | ep->dma = (use_dma != 0) && (ep->num == UDC_MSTRD_ENDPOINT); | |
149 | } else { | |
150 | ep->dma = (use_dma == 2) && (ep->num == UDC_MSTWR_ENDPOINT); | |
151 | if (ep->dma) | |
152 | DBG(dev, "%s out-dma hides short packets\n", | |
153 | ep->ep.name); | |
154 | } | |
155 | ||
156 | spin_lock_irqsave(&ep->dev->lock, flags); | |
157 | ||
158 | /* ep1 and ep2 can do double buffering and/or dma */ | |
159 | if (ep->num < 3) { | |
160 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
161 | u32 tmp; | |
162 | ||
163 | /* double buffer except (for now) with pio in */ | |
164 | tmp = ((ep->dma || !ep->is_in) | |
165 | ? 0x10 /* double buffered */ | |
166 | : 0x11 /* single buffer */ | |
167 | ) << ep->num; | |
168 | tmp |= readl(®s->EPxSingle); | |
169 | writel(tmp, ®s->EPxSingle); | |
170 | ||
171 | tmp = (ep->dma ? 0x10/*dma*/ : 0x11/*pio*/) << ep->num; | |
172 | tmp |= readl(®s->EPxBCS); | |
173 | writel(tmp, ®s->EPxBCS); | |
174 | } | |
175 | writel(mode, ep->reg_mode); | |
176 | command(ep->dev->regs, COMMAND_RESET, ep->num); | |
177 | ep->ep.maxpacket = max; | |
178 | ep->stopped = 0; | |
179 | ep->desc = desc; | |
180 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
181 | ||
182 | DBG(dev, "enable %s %s %s maxpacket %u\n", ep->ep.name, | |
183 | ep->is_in ? "IN" : "OUT", | |
184 | ep->dma ? "dma" : "pio", | |
185 | max); | |
186 | ||
187 | return 0; | |
188 | } | |
189 | ||
190 | static void ep_reset(struct goku_udc_regs __iomem *regs, struct goku_ep *ep) | |
191 | { | |
192 | struct goku_udc *dev = ep->dev; | |
193 | ||
194 | if (regs) { | |
195 | command(regs, COMMAND_INVALID, ep->num); | |
196 | if (ep->num) { | |
197 | if (ep->num == UDC_MSTWR_ENDPOINT) | |
198 | dev->int_enable &= ~(INT_MSTWREND | |
199 | |INT_MSTWRTMOUT); | |
200 | else if (ep->num == UDC_MSTRD_ENDPOINT) | |
201 | dev->int_enable &= ~INT_MSTRDEND; | |
202 | dev->int_enable &= ~INT_EPxDATASET (ep->num); | |
203 | } else | |
204 | dev->int_enable &= ~INT_EP0; | |
205 | writel(dev->int_enable, ®s->int_enable); | |
206 | readl(®s->int_enable); | |
207 | if (ep->num < 3) { | |
208 | struct goku_udc_regs __iomem *r = ep->dev->regs; | |
209 | u32 tmp; | |
210 | ||
211 | tmp = readl(&r->EPxSingle); | |
212 | tmp &= ~(0x11 << ep->num); | |
213 | writel(tmp, &r->EPxSingle); | |
214 | ||
215 | tmp = readl(&r->EPxBCS); | |
216 | tmp &= ~(0x11 << ep->num); | |
217 | writel(tmp, &r->EPxBCS); | |
218 | } | |
219 | /* reset dma in case we're still using it */ | |
220 | if (ep->dma) { | |
221 | u32 master; | |
222 | ||
223 | master = readl(®s->dma_master) & MST_RW_BITS; | |
224 | if (ep->num == UDC_MSTWR_ENDPOINT) { | |
225 | master &= ~MST_W_BITS; | |
226 | master |= MST_WR_RESET; | |
227 | } else { | |
228 | master &= ~MST_R_BITS; | |
229 | master |= MST_RD_RESET; | |
230 | } | |
231 | writel(master, ®s->dma_master); | |
232 | } | |
233 | } | |
234 | ||
235 | ep->ep.maxpacket = MAX_FIFO_SIZE; | |
236 | ep->desc = NULL; | |
237 | ep->stopped = 1; | |
238 | ep->irqs = 0; | |
239 | ep->dma = 0; | |
240 | } | |
241 | ||
242 | static int goku_ep_disable(struct usb_ep *_ep) | |
243 | { | |
244 | struct goku_ep *ep; | |
245 | struct goku_udc *dev; | |
246 | unsigned long flags; | |
247 | ||
248 | ep = container_of(_ep, struct goku_ep, ep); | |
249 | if (!_ep || !ep->desc) | |
250 | return -ENODEV; | |
251 | dev = ep->dev; | |
252 | if (dev->ep0state == EP0_SUSPEND) | |
253 | return -EBUSY; | |
254 | ||
255 | VDBG(dev, "disable %s\n", _ep->name); | |
256 | ||
257 | spin_lock_irqsave(&dev->lock, flags); | |
258 | nuke(ep, -ESHUTDOWN); | |
259 | ep_reset(dev->regs, ep); | |
260 | spin_unlock_irqrestore(&dev->lock, flags); | |
261 | ||
262 | return 0; | |
263 | } | |
264 | ||
265 | /*-------------------------------------------------------------------------*/ | |
266 | ||
267 | static struct usb_request * | |
55016f10 | 268 | goku_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) |
1da177e4 LT |
269 | { |
270 | struct goku_request *req; | |
271 | ||
272 | if (!_ep) | |
273 | return NULL; | |
7039f422 | 274 | req = kzalloc(sizeof *req, gfp_flags); |
1da177e4 LT |
275 | if (!req) |
276 | return NULL; | |
277 | ||
1da177e4 LT |
278 | req->req.dma = DMA_ADDR_INVALID; |
279 | INIT_LIST_HEAD(&req->queue); | |
280 | return &req->req; | |
281 | } | |
282 | ||
283 | static void | |
284 | goku_free_request(struct usb_ep *_ep, struct usb_request *_req) | |
285 | { | |
286 | struct goku_request *req; | |
287 | ||
288 | if (!_ep || !_req) | |
289 | return; | |
290 | ||
291 | req = container_of(_req, struct goku_request, req); | |
292 | WARN_ON(!list_empty(&req->queue)); | |
293 | kfree(req); | |
294 | } | |
295 | ||
296 | /*-------------------------------------------------------------------------*/ | |
297 | ||
1da177e4 LT |
298 | static void |
299 | done(struct goku_ep *ep, struct goku_request *req, int status) | |
300 | { | |
301 | struct goku_udc *dev; | |
302 | unsigned stopped = ep->stopped; | |
303 | ||
304 | list_del_init(&req->queue); | |
305 | ||
306 | if (likely(req->req.status == -EINPROGRESS)) | |
307 | req->req.status = status; | |
308 | else | |
309 | status = req->req.status; | |
310 | ||
311 | dev = ep->dev; | |
312 | if (req->mapped) { | |
313 | pci_unmap_single(dev->pdev, req->req.dma, req->req.length, | |
314 | ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); | |
315 | req->req.dma = DMA_ADDR_INVALID; | |
316 | req->mapped = 0; | |
317 | } | |
318 | ||
319 | #ifndef USB_TRACE | |
320 | if (status && status != -ESHUTDOWN) | |
321 | #endif | |
322 | VDBG(dev, "complete %s req %p stat %d len %u/%u\n", | |
323 | ep->ep.name, &req->req, status, | |
324 | req->req.actual, req->req.length); | |
325 | ||
326 | /* don't modify queue heads during completion callback */ | |
327 | ep->stopped = 1; | |
328 | spin_unlock(&dev->lock); | |
329 | req->req.complete(&ep->ep, &req->req); | |
330 | spin_lock(&dev->lock); | |
331 | ep->stopped = stopped; | |
332 | } | |
333 | ||
334 | /*-------------------------------------------------------------------------*/ | |
335 | ||
336 | static inline int | |
337 | write_packet(u32 __iomem *fifo, u8 *buf, struct goku_request *req, unsigned max) | |
338 | { | |
339 | unsigned length, count; | |
340 | ||
341 | length = min(req->req.length - req->req.actual, max); | |
342 | req->req.actual += length; | |
343 | ||
344 | count = length; | |
345 | while (likely(count--)) | |
346 | writel(*buf++, fifo); | |
347 | return length; | |
348 | } | |
349 | ||
350 | // return: 0 = still running, 1 = completed, negative = errno | |
351 | static int write_fifo(struct goku_ep *ep, struct goku_request *req) | |
352 | { | |
353 | struct goku_udc *dev = ep->dev; | |
354 | u32 tmp; | |
355 | u8 *buf; | |
356 | unsigned count; | |
357 | int is_last; | |
358 | ||
359 | tmp = readl(&dev->regs->DataSet); | |
360 | buf = req->req.buf + req->req.actual; | |
361 | prefetch(buf); | |
362 | ||
363 | dev = ep->dev; | |
364 | if (unlikely(ep->num == 0 && dev->ep0state != EP0_IN)) | |
365 | return -EL2HLT; | |
366 | ||
367 | /* NOTE: just single-buffered PIO-IN for now. */ | |
368 | if (unlikely((tmp & DATASET_A(ep->num)) != 0)) | |
369 | return 0; | |
370 | ||
371 | /* clear our "packet available" irq */ | |
372 | if (ep->num != 0) | |
373 | writel(~INT_EPxDATASET(ep->num), &dev->regs->int_status); | |
374 | ||
375 | count = write_packet(ep->reg_fifo, buf, req, ep->ep.maxpacket); | |
376 | ||
377 | /* last packet often short (sometimes a zlp, especially on ep0) */ | |
378 | if (unlikely(count != ep->ep.maxpacket)) { | |
379 | writel(~(1<<ep->num), &dev->regs->EOP); | |
380 | if (ep->num == 0) { | |
381 | dev->ep[0].stopped = 1; | |
382 | dev->ep0state = EP0_STATUS; | |
383 | } | |
384 | is_last = 1; | |
385 | } else { | |
386 | if (likely(req->req.length != req->req.actual) | |
387 | || req->req.zero) | |
388 | is_last = 0; | |
389 | else | |
390 | is_last = 1; | |
391 | } | |
392 | #if 0 /* printk seemed to trash is_last...*/ | |
393 | //#ifdef USB_TRACE | |
394 | VDBG(dev, "wrote %s %u bytes%s IN %u left %p\n", | |
395 | ep->ep.name, count, is_last ? "/last" : "", | |
396 | req->req.length - req->req.actual, req); | |
397 | #endif | |
398 | ||
399 | /* requests complete when all IN data is in the FIFO, | |
400 | * or sometimes later, if a zlp was needed. | |
401 | */ | |
402 | if (is_last) { | |
403 | done(ep, req, 0); | |
404 | return 1; | |
405 | } | |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
410 | static int read_fifo(struct goku_ep *ep, struct goku_request *req) | |
411 | { | |
412 | struct goku_udc_regs __iomem *regs; | |
413 | u32 size, set; | |
414 | u8 *buf; | |
415 | unsigned bufferspace, is_short, dbuff; | |
416 | ||
417 | regs = ep->dev->regs; | |
418 | top: | |
419 | buf = req->req.buf + req->req.actual; | |
420 | prefetchw(buf); | |
421 | ||
422 | if (unlikely(ep->num == 0 && ep->dev->ep0state != EP0_OUT)) | |
423 | return -EL2HLT; | |
424 | ||
425 | dbuff = (ep->num == 1 || ep->num == 2); | |
426 | do { | |
427 | /* ack dataset irq matching the status we'll handle */ | |
428 | if (ep->num != 0) | |
429 | writel(~INT_EPxDATASET(ep->num), ®s->int_status); | |
430 | ||
431 | set = readl(®s->DataSet) & DATASET_AB(ep->num); | |
432 | size = readl(®s->EPxSizeLA[ep->num]); | |
433 | bufferspace = req->req.length - req->req.actual; | |
434 | ||
435 | /* usually do nothing without an OUT packet */ | |
436 | if (likely(ep->num != 0 || bufferspace != 0)) { | |
437 | if (unlikely(set == 0)) | |
438 | break; | |
439 | /* use ep1/ep2 double-buffering for OUT */ | |
440 | if (!(size & PACKET_ACTIVE)) | |
441 | size = readl(®s->EPxSizeLB[ep->num]); | |
2d70c99b | 442 | if (!(size & PACKET_ACTIVE)) /* "can't happen" */ |
1da177e4 LT |
443 | break; |
444 | size &= DATASIZE; /* EPxSizeH == 0 */ | |
445 | ||
446 | /* ep0out no-out-data case for set_config, etc */ | |
447 | } else | |
448 | size = 0; | |
449 | ||
450 | /* read all bytes from this packet */ | |
451 | req->req.actual += size; | |
452 | is_short = (size < ep->ep.maxpacket); | |
453 | #ifdef USB_TRACE | |
454 | VDBG(ep->dev, "read %s %u bytes%s OUT req %p %u/%u\n", | |
455 | ep->ep.name, size, is_short ? "/S" : "", | |
456 | req, req->req.actual, req->req.length); | |
457 | #endif | |
458 | while (likely(size-- != 0)) { | |
459 | u8 byte = (u8) readl(ep->reg_fifo); | |
460 | ||
461 | if (unlikely(bufferspace == 0)) { | |
462 | /* this happens when the driver's buffer | |
463 | * is smaller than what the host sent. | |
464 | * discard the extra data in this packet. | |
465 | */ | |
466 | if (req->req.status != -EOVERFLOW) | |
467 | DBG(ep->dev, "%s overflow %u\n", | |
468 | ep->ep.name, size); | |
469 | req->req.status = -EOVERFLOW; | |
470 | } else { | |
471 | *buf++ = byte; | |
472 | bufferspace--; | |
473 | } | |
474 | } | |
475 | ||
476 | /* completion */ | |
477 | if (unlikely(is_short || req->req.actual == req->req.length)) { | |
478 | if (unlikely(ep->num == 0)) { | |
479 | /* non-control endpoints now usable? */ | |
480 | if (ep->dev->req_config) | |
481 | writel(ep->dev->configured | |
482 | ? USBSTATE_CONFIGURED | |
483 | : 0, | |
484 | ®s->UsbState); | |
485 | /* ep0out status stage */ | |
486 | writel(~(1<<0), ®s->EOP); | |
487 | ep->stopped = 1; | |
488 | ep->dev->ep0state = EP0_STATUS; | |
489 | } | |
490 | done(ep, req, 0); | |
491 | ||
492 | /* empty the second buffer asap */ | |
493 | if (dbuff && !list_empty(&ep->queue)) { | |
494 | req = list_entry(ep->queue.next, | |
495 | struct goku_request, queue); | |
496 | goto top; | |
497 | } | |
498 | return 1; | |
499 | } | |
500 | } while (dbuff); | |
501 | return 0; | |
502 | } | |
503 | ||
504 | static inline void | |
505 | pio_irq_enable(struct goku_udc *dev, | |
506 | struct goku_udc_regs __iomem *regs, int epnum) | |
507 | { | |
508 | dev->int_enable |= INT_EPxDATASET (epnum); | |
509 | writel(dev->int_enable, ®s->int_enable); | |
510 | /* write may still be posted */ | |
511 | } | |
512 | ||
513 | static inline void | |
514 | pio_irq_disable(struct goku_udc *dev, | |
515 | struct goku_udc_regs __iomem *regs, int epnum) | |
516 | { | |
517 | dev->int_enable &= ~INT_EPxDATASET (epnum); | |
518 | writel(dev->int_enable, ®s->int_enable); | |
519 | /* write may still be posted */ | |
520 | } | |
521 | ||
522 | static inline void | |
523 | pio_advance(struct goku_ep *ep) | |
524 | { | |
525 | struct goku_request *req; | |
526 | ||
527 | if (unlikely(list_empty (&ep->queue))) | |
528 | return; | |
529 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
530 | (ep->is_in ? write_fifo : read_fifo)(ep, req); | |
531 | } | |
532 | ||
533 | ||
534 | /*-------------------------------------------------------------------------*/ | |
535 | ||
536 | // return: 0 = q running, 1 = q stopped, negative = errno | |
537 | static int start_dma(struct goku_ep *ep, struct goku_request *req) | |
538 | { | |
539 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
540 | u32 master; | |
541 | u32 start = req->req.dma; | |
542 | u32 end = start + req->req.length - 1; | |
543 | ||
544 | master = readl(®s->dma_master) & MST_RW_BITS; | |
545 | ||
546 | /* re-init the bits affecting IN dma; careful with zlps */ | |
547 | if (likely(ep->is_in)) { | |
548 | if (unlikely(master & MST_RD_ENA)) { | |
549 | DBG (ep->dev, "start, IN active dma %03x!!\n", | |
550 | master); | |
551 | // return -EL2HLT; | |
552 | } | |
553 | writel(end, ®s->in_dma_end); | |
554 | writel(start, ®s->in_dma_start); | |
555 | ||
556 | master &= ~MST_R_BITS; | |
557 | if (unlikely(req->req.length == 0)) | |
558 | master = MST_RD_ENA | MST_RD_EOPB; | |
559 | else if ((req->req.length % ep->ep.maxpacket) != 0 | |
560 | || req->req.zero) | |
561 | master = MST_RD_ENA | MST_EOPB_ENA; | |
562 | else | |
563 | master = MST_RD_ENA | MST_EOPB_DIS; | |
564 | ||
565 | ep->dev->int_enable |= INT_MSTRDEND; | |
566 | ||
567 | /* Goku DMA-OUT merges short packets, which plays poorly with | |
568 | * protocols where short packets mark the transfer boundaries. | |
569 | * The chip supports a nonstandard policy with INT_MSTWRTMOUT, | |
570 | * ending transfers after 3 SOFs; we don't turn it on. | |
571 | */ | |
572 | } else { | |
573 | if (unlikely(master & MST_WR_ENA)) { | |
574 | DBG (ep->dev, "start, OUT active dma %03x!!\n", | |
575 | master); | |
576 | // return -EL2HLT; | |
577 | } | |
578 | writel(end, ®s->out_dma_end); | |
579 | writel(start, ®s->out_dma_start); | |
580 | ||
581 | master &= ~MST_W_BITS; | |
582 | master |= MST_WR_ENA | MST_TIMEOUT_DIS; | |
583 | ||
584 | ep->dev->int_enable |= INT_MSTWREND|INT_MSTWRTMOUT; | |
585 | } | |
586 | ||
587 | writel(master, ®s->dma_master); | |
588 | writel(ep->dev->int_enable, ®s->int_enable); | |
589 | return 0; | |
590 | } | |
591 | ||
592 | static void dma_advance(struct goku_udc *dev, struct goku_ep *ep) | |
593 | { | |
594 | struct goku_request *req; | |
595 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
596 | u32 master; | |
597 | ||
598 | master = readl(®s->dma_master); | |
599 | ||
600 | if (unlikely(list_empty(&ep->queue))) { | |
601 | stop: | |
602 | if (ep->is_in) | |
603 | dev->int_enable &= ~INT_MSTRDEND; | |
604 | else | |
605 | dev->int_enable &= ~(INT_MSTWREND|INT_MSTWRTMOUT); | |
606 | writel(dev->int_enable, ®s->int_enable); | |
607 | return; | |
608 | } | |
609 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
610 | ||
611 | /* normal hw dma completion (not abort) */ | |
612 | if (likely(ep->is_in)) { | |
613 | if (unlikely(master & MST_RD_ENA)) | |
614 | return; | |
615 | req->req.actual = readl(®s->in_dma_current); | |
616 | } else { | |
617 | if (unlikely(master & MST_WR_ENA)) | |
618 | return; | |
619 | ||
620 | /* hardware merges short packets, and also hides packet | |
621 | * overruns. a partial packet MAY be in the fifo here. | |
622 | */ | |
623 | req->req.actual = readl(®s->out_dma_current); | |
624 | } | |
625 | req->req.actual -= req->req.dma; | |
626 | req->req.actual++; | |
627 | ||
628 | #ifdef USB_TRACE | |
629 | VDBG(dev, "done %s %s dma, %u/%u bytes, req %p\n", | |
630 | ep->ep.name, ep->is_in ? "IN" : "OUT", | |
631 | req->req.actual, req->req.length, req); | |
632 | #endif | |
633 | done(ep, req, 0); | |
634 | if (list_empty(&ep->queue)) | |
635 | goto stop; | |
636 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
637 | (void) start_dma(ep, req); | |
638 | } | |
639 | ||
640 | static void abort_dma(struct goku_ep *ep, int status) | |
641 | { | |
642 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
643 | struct goku_request *req; | |
644 | u32 curr, master; | |
645 | ||
646 | /* NAK future host requests, hoping the implicit delay lets the | |
647 | * dma engine finish reading (or writing) its latest packet and | |
648 | * empty the dma buffer (up to 16 bytes). | |
649 | * | |
650 | * This avoids needing to clean up a partial packet in the fifo; | |
651 | * we can't do that for IN without side effects to HALT and TOGGLE. | |
652 | */ | |
653 | command(regs, COMMAND_FIFO_DISABLE, ep->num); | |
654 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
655 | master = readl(®s->dma_master) & MST_RW_BITS; | |
656 | ||
657 | /* FIXME using these resets isn't usably documented. this may | |
658 | * not work unless it's followed by disabling the endpoint. | |
659 | * | |
660 | * FIXME the OUT reset path doesn't even behave consistently. | |
661 | */ | |
662 | if (ep->is_in) { | |
663 | if (unlikely((readl(®s->dma_master) & MST_RD_ENA) == 0)) | |
664 | goto finished; | |
665 | curr = readl(®s->in_dma_current); | |
666 | ||
667 | writel(curr, ®s->in_dma_end); | |
668 | writel(curr, ®s->in_dma_start); | |
669 | ||
670 | master &= ~MST_R_BITS; | |
671 | master |= MST_RD_RESET; | |
672 | writel(master, ®s->dma_master); | |
673 | ||
674 | if (readl(®s->dma_master) & MST_RD_ENA) | |
675 | DBG(ep->dev, "IN dma active after reset!\n"); | |
676 | ||
677 | } else { | |
678 | if (unlikely((readl(®s->dma_master) & MST_WR_ENA) == 0)) | |
679 | goto finished; | |
680 | curr = readl(®s->out_dma_current); | |
681 | ||
682 | writel(curr, ®s->out_dma_end); | |
683 | writel(curr, ®s->out_dma_start); | |
684 | ||
685 | master &= ~MST_W_BITS; | |
686 | master |= MST_WR_RESET; | |
687 | writel(master, ®s->dma_master); | |
688 | ||
689 | if (readl(®s->dma_master) & MST_WR_ENA) | |
690 | DBG(ep->dev, "OUT dma active after reset!\n"); | |
691 | } | |
692 | req->req.actual = (curr - req->req.dma) + 1; | |
693 | req->req.status = status; | |
694 | ||
441b62c1 | 695 | VDBG(ep->dev, "%s %s %s %d/%d\n", __func__, ep->ep.name, |
1da177e4 LT |
696 | ep->is_in ? "IN" : "OUT", |
697 | req->req.actual, req->req.length); | |
698 | ||
699 | command(regs, COMMAND_FIFO_ENABLE, ep->num); | |
700 | ||
701 | return; | |
702 | ||
703 | finished: | |
704 | /* dma already completed; no abort needed */ | |
705 | command(regs, COMMAND_FIFO_ENABLE, ep->num); | |
706 | req->req.actual = req->req.length; | |
707 | req->req.status = 0; | |
708 | } | |
709 | ||
710 | /*-------------------------------------------------------------------------*/ | |
711 | ||
712 | static int | |
55016f10 | 713 | goku_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) |
1da177e4 LT |
714 | { |
715 | struct goku_request *req; | |
716 | struct goku_ep *ep; | |
717 | struct goku_udc *dev; | |
718 | unsigned long flags; | |
719 | int status; | |
720 | ||
721 | /* always require a cpu-view buffer so pio works */ | |
722 | req = container_of(_req, struct goku_request, req); | |
723 | if (unlikely(!_req || !_req->complete | |
724 | || !_req->buf || !list_empty(&req->queue))) | |
725 | return -EINVAL; | |
726 | ep = container_of(_ep, struct goku_ep, ep); | |
727 | if (unlikely(!_ep || (!ep->desc && ep->num != 0))) | |
728 | return -EINVAL; | |
729 | dev = ep->dev; | |
730 | if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) | |
731 | return -ESHUTDOWN; | |
732 | ||
733 | /* can't touch registers when suspended */ | |
734 | if (dev->ep0state == EP0_SUSPEND) | |
735 | return -EBUSY; | |
736 | ||
737 | /* set up dma mapping in case the caller didn't */ | |
738 | if (ep->dma && _req->dma == DMA_ADDR_INVALID) { | |
739 | _req->dma = pci_map_single(dev->pdev, _req->buf, _req->length, | |
740 | ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); | |
741 | req->mapped = 1; | |
742 | } | |
743 | ||
744 | #ifdef USB_TRACE | |
745 | VDBG(dev, "%s queue req %p, len %u buf %p\n", | |
746 | _ep->name, _req, _req->length, _req->buf); | |
747 | #endif | |
748 | ||
749 | spin_lock_irqsave(&dev->lock, flags); | |
750 | ||
751 | _req->status = -EINPROGRESS; | |
752 | _req->actual = 0; | |
753 | ||
754 | /* for ep0 IN without premature status, zlp is required and | |
755 | * writing EOP starts the status stage (OUT). | |
756 | */ | |
757 | if (unlikely(ep->num == 0 && ep->is_in)) | |
758 | _req->zero = 1; | |
759 | ||
760 | /* kickstart this i/o queue? */ | |
761 | status = 0; | |
762 | if (list_empty(&ep->queue) && likely(!ep->stopped)) { | |
763 | /* dma: done after dma completion IRQ (or error) | |
764 | * pio: done after last fifo operation | |
765 | */ | |
766 | if (ep->dma) | |
767 | status = start_dma(ep, req); | |
768 | else | |
769 | status = (ep->is_in ? write_fifo : read_fifo)(ep, req); | |
770 | ||
771 | if (unlikely(status != 0)) { | |
772 | if (status > 0) | |
773 | status = 0; | |
774 | req = NULL; | |
775 | } | |
776 | ||
777 | } /* else pio or dma irq handler advances the queue. */ | |
778 | ||
779 | if (likely(req != 0)) | |
780 | list_add_tail(&req->queue, &ep->queue); | |
781 | ||
782 | if (likely(!list_empty(&ep->queue)) | |
783 | && likely(ep->num != 0) | |
784 | && !ep->dma | |
785 | && !(dev->int_enable & INT_EPxDATASET (ep->num))) | |
786 | pio_irq_enable(dev, dev->regs, ep->num); | |
787 | ||
788 | spin_unlock_irqrestore(&dev->lock, flags); | |
789 | ||
790 | /* pci writes may still be posted */ | |
791 | return status; | |
792 | } | |
793 | ||
794 | /* dequeue ALL requests */ | |
795 | static void nuke(struct goku_ep *ep, int status) | |
796 | { | |
797 | struct goku_request *req; | |
798 | ||
799 | ep->stopped = 1; | |
800 | if (list_empty(&ep->queue)) | |
801 | return; | |
802 | if (ep->dma) | |
803 | abort_dma(ep, status); | |
804 | while (!list_empty(&ep->queue)) { | |
805 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
806 | done(ep, req, status); | |
807 | } | |
808 | } | |
809 | ||
810 | /* dequeue JUST ONE request */ | |
811 | static int goku_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
812 | { | |
813 | struct goku_request *req; | |
814 | struct goku_ep *ep; | |
815 | struct goku_udc *dev; | |
816 | unsigned long flags; | |
817 | ||
818 | ep = container_of(_ep, struct goku_ep, ep); | |
819 | if (!_ep || !_req || (!ep->desc && ep->num != 0)) | |
820 | return -EINVAL; | |
821 | dev = ep->dev; | |
822 | if (!dev->driver) | |
823 | return -ESHUTDOWN; | |
824 | ||
825 | /* we can't touch (dma) registers when suspended */ | |
826 | if (dev->ep0state == EP0_SUSPEND) | |
827 | return -EBUSY; | |
828 | ||
441b62c1 | 829 | VDBG(dev, "%s %s %s %s %p\n", __func__, _ep->name, |
1da177e4 LT |
830 | ep->is_in ? "IN" : "OUT", |
831 | ep->dma ? "dma" : "pio", | |
832 | _req); | |
833 | ||
834 | spin_lock_irqsave(&dev->lock, flags); | |
835 | ||
836 | /* make sure it's actually queued on this endpoint */ | |
837 | list_for_each_entry (req, &ep->queue, queue) { | |
838 | if (&req->req == _req) | |
839 | break; | |
840 | } | |
841 | if (&req->req != _req) { | |
842 | spin_unlock_irqrestore (&dev->lock, flags); | |
843 | return -EINVAL; | |
844 | } | |
845 | ||
846 | if (ep->dma && ep->queue.next == &req->queue && !ep->stopped) { | |
847 | abort_dma(ep, -ECONNRESET); | |
848 | done(ep, req, -ECONNRESET); | |
849 | dma_advance(dev, ep); | |
850 | } else if (!list_empty(&req->queue)) | |
851 | done(ep, req, -ECONNRESET); | |
852 | else | |
853 | req = NULL; | |
854 | spin_unlock_irqrestore(&dev->lock, flags); | |
855 | ||
856 | return req ? 0 : -EOPNOTSUPP; | |
857 | } | |
858 | ||
859 | /*-------------------------------------------------------------------------*/ | |
860 | ||
861 | static void goku_clear_halt(struct goku_ep *ep) | |
862 | { | |
863 | // assert (ep->num !=0) | |
864 | VDBG(ep->dev, "%s clear halt\n", ep->ep.name); | |
865 | command(ep->dev->regs, COMMAND_SETDATA0, ep->num); | |
866 | command(ep->dev->regs, COMMAND_STALL_CLEAR, ep->num); | |
867 | if (ep->stopped) { | |
868 | ep->stopped = 0; | |
869 | if (ep->dma) { | |
870 | struct goku_request *req; | |
871 | ||
872 | if (list_empty(&ep->queue)) | |
873 | return; | |
874 | req = list_entry(ep->queue.next, struct goku_request, | |
875 | queue); | |
876 | (void) start_dma(ep, req); | |
877 | } else | |
878 | pio_advance(ep); | |
879 | } | |
880 | } | |
881 | ||
882 | static int goku_set_halt(struct usb_ep *_ep, int value) | |
883 | { | |
884 | struct goku_ep *ep; | |
885 | unsigned long flags; | |
886 | int retval = 0; | |
887 | ||
888 | if (!_ep) | |
889 | return -ENODEV; | |
890 | ep = container_of (_ep, struct goku_ep, ep); | |
891 | ||
892 | if (ep->num == 0) { | |
893 | if (value) { | |
894 | ep->dev->ep0state = EP0_STALL; | |
895 | ep->dev->ep[0].stopped = 1; | |
896 | } else | |
897 | return -EINVAL; | |
898 | ||
899 | /* don't change EPxSTATUS_EP_INVALID to READY */ | |
900 | } else if (!ep->desc) { | |
441b62c1 | 901 | DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name); |
1da177e4 LT |
902 | return -EINVAL; |
903 | } | |
904 | ||
905 | spin_lock_irqsave(&ep->dev->lock, flags); | |
906 | if (!list_empty(&ep->queue)) | |
907 | retval = -EAGAIN; | |
908 | else if (ep->is_in && value | |
909 | /* data in (either) packet buffer? */ | |
910 | && (readl(&ep->dev->regs->DataSet) | |
911 | & DATASET_AB(ep->num))) | |
912 | retval = -EAGAIN; | |
913 | else if (!value) | |
914 | goku_clear_halt(ep); | |
915 | else { | |
916 | ep->stopped = 1; | |
917 | VDBG(ep->dev, "%s set halt\n", ep->ep.name); | |
918 | command(ep->dev->regs, COMMAND_STALL, ep->num); | |
919 | readl(ep->reg_status); | |
920 | } | |
921 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
922 | return retval; | |
923 | } | |
924 | ||
925 | static int goku_fifo_status(struct usb_ep *_ep) | |
926 | { | |
927 | struct goku_ep *ep; | |
928 | struct goku_udc_regs __iomem *regs; | |
929 | u32 size; | |
930 | ||
931 | if (!_ep) | |
932 | return -ENODEV; | |
933 | ep = container_of(_ep, struct goku_ep, ep); | |
934 | ||
935 | /* size is only reported sanely for OUT */ | |
936 | if (ep->is_in) | |
937 | return -EOPNOTSUPP; | |
938 | ||
939 | /* ignores 16-byte dma buffer; SizeH == 0 */ | |
940 | regs = ep->dev->regs; | |
941 | size = readl(®s->EPxSizeLA[ep->num]) & DATASIZE; | |
942 | size += readl(®s->EPxSizeLB[ep->num]) & DATASIZE; | |
441b62c1 | 943 | VDBG(ep->dev, "%s %s %u\n", __func__, ep->ep.name, size); |
1da177e4 LT |
944 | return size; |
945 | } | |
946 | ||
947 | static void goku_fifo_flush(struct usb_ep *_ep) | |
948 | { | |
949 | struct goku_ep *ep; | |
950 | struct goku_udc_regs __iomem *regs; | |
951 | u32 size; | |
952 | ||
953 | if (!_ep) | |
954 | return; | |
955 | ep = container_of(_ep, struct goku_ep, ep); | |
441b62c1 | 956 | VDBG(ep->dev, "%s %s\n", __func__, ep->ep.name); |
1da177e4 LT |
957 | |
958 | /* don't change EPxSTATUS_EP_INVALID to READY */ | |
959 | if (!ep->desc && ep->num != 0) { | |
441b62c1 | 960 | DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name); |
1da177e4 LT |
961 | return; |
962 | } | |
963 | ||
964 | regs = ep->dev->regs; | |
965 | size = readl(®s->EPxSizeLA[ep->num]); | |
966 | size &= DATASIZE; | |
967 | ||
968 | /* Non-desirable behavior: FIFO_CLEAR also clears the | |
969 | * endpoint halt feature. For OUT, we _could_ just read | |
970 | * the bytes out (PIO, if !ep->dma); for in, no choice. | |
971 | */ | |
972 | if (size) | |
973 | command(regs, COMMAND_FIFO_CLEAR, ep->num); | |
974 | } | |
975 | ||
976 | static struct usb_ep_ops goku_ep_ops = { | |
977 | .enable = goku_ep_enable, | |
978 | .disable = goku_ep_disable, | |
979 | ||
980 | .alloc_request = goku_alloc_request, | |
981 | .free_request = goku_free_request, | |
982 | ||
1da177e4 LT |
983 | .queue = goku_queue, |
984 | .dequeue = goku_dequeue, | |
985 | ||
986 | .set_halt = goku_set_halt, | |
987 | .fifo_status = goku_fifo_status, | |
988 | .fifo_flush = goku_fifo_flush, | |
989 | }; | |
990 | ||
991 | /*-------------------------------------------------------------------------*/ | |
992 | ||
993 | static int goku_get_frame(struct usb_gadget *_gadget) | |
994 | { | |
995 | return -EOPNOTSUPP; | |
996 | } | |
997 | ||
998 | static const struct usb_gadget_ops goku_ops = { | |
999 | .get_frame = goku_get_frame, | |
1000 | // no remote wakeup | |
1001 | // not selfpowered | |
1002 | }; | |
1003 | ||
1004 | /*-------------------------------------------------------------------------*/ | |
1005 | ||
1006 | static inline char *dmastr(void) | |
1007 | { | |
1008 | if (use_dma == 0) | |
1009 | return "(dma disabled)"; | |
1010 | else if (use_dma == 2) | |
1011 | return "(dma IN and OUT)"; | |
1012 | else | |
1013 | return "(dma IN)"; | |
1014 | } | |
1015 | ||
1016 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
1017 | ||
1018 | static const char proc_node_name [] = "driver/udc"; | |
1019 | ||
1020 | #define FOURBITS "%s%s%s%s" | |
1021 | #define EIGHTBITS FOURBITS FOURBITS | |
1022 | ||
1023 | static void | |
1024 | dump_intmask(const char *label, u32 mask, char **next, unsigned *size) | |
1025 | { | |
1026 | int t; | |
1027 | ||
1028 | /* int_status is the same format ... */ | |
1029 | t = scnprintf(*next, *size, | |
1030 | "%s %05X =" FOURBITS EIGHTBITS EIGHTBITS "\n", | |
1031 | label, mask, | |
1032 | (mask & INT_PWRDETECT) ? " power" : "", | |
1033 | (mask & INT_SYSERROR) ? " sys" : "", | |
1034 | (mask & INT_MSTRDEND) ? " in-dma" : "", | |
1035 | (mask & INT_MSTWRTMOUT) ? " wrtmo" : "", | |
1036 | ||
1037 | (mask & INT_MSTWREND) ? " out-dma" : "", | |
1038 | (mask & INT_MSTWRSET) ? " wrset" : "", | |
1039 | (mask & INT_ERR) ? " err" : "", | |
1040 | (mask & INT_SOF) ? " sof" : "", | |
1041 | ||
1042 | (mask & INT_EP3NAK) ? " ep3nak" : "", | |
1043 | (mask & INT_EP2NAK) ? " ep2nak" : "", | |
1044 | (mask & INT_EP1NAK) ? " ep1nak" : "", | |
1045 | (mask & INT_EP3DATASET) ? " ep3" : "", | |
1046 | ||
1047 | (mask & INT_EP2DATASET) ? " ep2" : "", | |
1048 | (mask & INT_EP1DATASET) ? " ep1" : "", | |
1049 | (mask & INT_STATUSNAK) ? " ep0snak" : "", | |
1050 | (mask & INT_STATUS) ? " ep0status" : "", | |
1051 | ||
1052 | (mask & INT_SETUP) ? " setup" : "", | |
1053 | (mask & INT_ENDPOINT0) ? " ep0" : "", | |
1054 | (mask & INT_USBRESET) ? " reset" : "", | |
1055 | (mask & INT_SUSPEND) ? " suspend" : ""); | |
1056 | *size -= t; | |
1057 | *next += t; | |
1058 | } | |
1059 | ||
1060 | ||
1061 | static int | |
1062 | udc_proc_read(char *buffer, char **start, off_t off, int count, | |
1063 | int *eof, void *_dev) | |
1064 | { | |
1065 | char *buf = buffer; | |
1066 | struct goku_udc *dev = _dev; | |
1067 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1068 | char *next = buf; | |
1069 | unsigned size = count; | |
1070 | unsigned long flags; | |
1071 | int i, t, is_usb_connected; | |
1072 | u32 tmp; | |
1073 | ||
1074 | if (off != 0) | |
1075 | return 0; | |
1076 | ||
1077 | local_irq_save(flags); | |
1078 | ||
1079 | /* basic device status */ | |
1080 | tmp = readl(®s->power_detect); | |
1081 | is_usb_connected = tmp & PW_DETECT; | |
1082 | t = scnprintf(next, size, | |
1083 | "%s - %s\n" | |
1084 | "%s version: %s %s\n" | |
1085 | "Gadget driver: %s\n" | |
1086 | "Host %s, %s\n" | |
1087 | "\n", | |
1088 | pci_name(dev->pdev), driver_desc, | |
1089 | driver_name, DRIVER_VERSION, dmastr(), | |
1090 | dev->driver ? dev->driver->driver.name : "(none)", | |
1091 | is_usb_connected | |
1092 | ? ((tmp & PW_PULLUP) ? "full speed" : "powered") | |
1093 | : "disconnected", | |
2d70c99b | 1094 | ({char *state; |
1da177e4 | 1095 | switch(dev->ep0state){ |
2d70c99b DB |
1096 | case EP0_DISCONNECT: state = "ep0_disconnect"; break; |
1097 | case EP0_IDLE: state = "ep0_idle"; break; | |
1098 | case EP0_IN: state = "ep0_in"; break; | |
1099 | case EP0_OUT: state = "ep0_out"; break; | |
1100 | case EP0_STATUS: state = "ep0_status"; break; | |
1101 | case EP0_STALL: state = "ep0_stall"; break; | |
1102 | case EP0_SUSPEND: state = "ep0_suspend"; break; | |
1103 | default: state = "ep0_?"; break; | |
1104 | } state; }) | |
1da177e4 LT |
1105 | ); |
1106 | size -= t; | |
1107 | next += t; | |
1108 | ||
1109 | dump_intmask("int_status", readl(®s->int_status), &next, &size); | |
1110 | dump_intmask("int_enable", readl(®s->int_enable), &next, &size); | |
1111 | ||
1112 | if (!is_usb_connected || !dev->driver || (tmp & PW_PULLUP) == 0) | |
1113 | goto done; | |
1114 | ||
1115 | /* registers for (active) device and ep0 */ | |
1116 | t = scnprintf(next, size, "\nirqs %lu\ndataset %02x " | |
1117 | "single.bcs %02x.%02x state %x addr %u\n", | |
1118 | dev->irqs, readl(®s->DataSet), | |
1119 | readl(®s->EPxSingle), readl(®s->EPxBCS), | |
1120 | readl(®s->UsbState), | |
1121 | readl(®s->address)); | |
1122 | size -= t; | |
1123 | next += t; | |
1124 | ||
1125 | tmp = readl(®s->dma_master); | |
1126 | t = scnprintf(next, size, | |
1127 | "dma %03X =" EIGHTBITS "%s %s\n", tmp, | |
1128 | (tmp & MST_EOPB_DIS) ? " eopb-" : "", | |
1129 | (tmp & MST_EOPB_ENA) ? " eopb+" : "", | |
1130 | (tmp & MST_TIMEOUT_DIS) ? " tmo-" : "", | |
1131 | (tmp & MST_TIMEOUT_ENA) ? " tmo+" : "", | |
1132 | ||
1133 | (tmp & MST_RD_EOPB) ? " eopb" : "", | |
1134 | (tmp & MST_RD_RESET) ? " in_reset" : "", | |
1135 | (tmp & MST_WR_RESET) ? " out_reset" : "", | |
1136 | (tmp & MST_RD_ENA) ? " IN" : "", | |
1137 | ||
1138 | (tmp & MST_WR_ENA) ? " OUT" : "", | |
1139 | (tmp & MST_CONNECTION) | |
1140 | ? "ep1in/ep2out" | |
1141 | : "ep1out/ep2in"); | |
1142 | size -= t; | |
1143 | next += t; | |
1144 | ||
1145 | /* dump endpoint queues */ | |
1146 | for (i = 0; i < 4; i++) { | |
1147 | struct goku_ep *ep = &dev->ep [i]; | |
1148 | struct goku_request *req; | |
1da177e4 LT |
1149 | |
1150 | if (i && !ep->desc) | |
1151 | continue; | |
1152 | ||
1153 | tmp = readl(ep->reg_status); | |
1154 | t = scnprintf(next, size, | |
1155 | "%s %s max %u %s, irqs %lu, " | |
1156 | "status %02x (%s) " FOURBITS "\n", | |
1157 | ep->ep.name, | |
1158 | ep->is_in ? "in" : "out", | |
1159 | ep->ep.maxpacket, | |
1160 | ep->dma ? "dma" : "pio", | |
1161 | ep->irqs, | |
1162 | tmp, ({ char *s; | |
1163 | switch (tmp & EPxSTATUS_EP_MASK) { | |
1164 | case EPxSTATUS_EP_READY: | |
1165 | s = "ready"; break; | |
1166 | case EPxSTATUS_EP_DATAIN: | |
1167 | s = "packet"; break; | |
1168 | case EPxSTATUS_EP_FULL: | |
1169 | s = "full"; break; | |
1170 | case EPxSTATUS_EP_TX_ERR: // host will retry | |
1171 | s = "tx_err"; break; | |
1172 | case EPxSTATUS_EP_RX_ERR: | |
1173 | s = "rx_err"; break; | |
1174 | case EPxSTATUS_EP_BUSY: /* ep0 only */ | |
1175 | s = "busy"; break; | |
1176 | case EPxSTATUS_EP_STALL: | |
1177 | s = "stall"; break; | |
1178 | case EPxSTATUS_EP_INVALID: // these "can't happen" | |
1179 | s = "invalid"; break; | |
1180 | default: | |
1181 | s = "?"; break; | |
1182 | }; s; }), | |
1183 | (tmp & EPxSTATUS_TOGGLE) ? "data1" : "data0", | |
1184 | (tmp & EPxSTATUS_SUSPEND) ? " suspend" : "", | |
1185 | (tmp & EPxSTATUS_FIFO_DISABLE) ? " disable" : "", | |
1186 | (tmp & EPxSTATUS_STAGE_ERROR) ? " ep0stat" : "" | |
1187 | ); | |
1188 | if (t <= 0 || t > size) | |
1189 | goto done; | |
1190 | size -= t; | |
1191 | next += t; | |
1192 | ||
1193 | if (list_empty(&ep->queue)) { | |
1194 | t = scnprintf(next, size, "\t(nothing queued)\n"); | |
1195 | if (t <= 0 || t > size) | |
1196 | goto done; | |
1197 | size -= t; | |
1198 | next += t; | |
1199 | continue; | |
1200 | } | |
1201 | list_for_each_entry(req, &ep->queue, queue) { | |
1202 | if (ep->dma && req->queue.prev == &ep->queue) { | |
1203 | if (i == UDC_MSTRD_ENDPOINT) | |
1204 | tmp = readl(®s->in_dma_current); | |
1205 | else | |
1206 | tmp = readl(®s->out_dma_current); | |
1207 | tmp -= req->req.dma; | |
1208 | tmp++; | |
1209 | } else | |
1210 | tmp = req->req.actual; | |
1211 | ||
1212 | t = scnprintf(next, size, | |
1213 | "\treq %p len %u/%u buf %p\n", | |
1214 | &req->req, tmp, req->req.length, | |
1215 | req->req.buf); | |
1216 | if (t <= 0 || t > size) | |
1217 | goto done; | |
1218 | size -= t; | |
1219 | next += t; | |
1220 | } | |
1221 | } | |
1222 | ||
1223 | done: | |
1224 | local_irq_restore(flags); | |
1225 | *eof = 1; | |
1226 | return count - size; | |
1227 | } | |
1228 | ||
1229 | #endif /* CONFIG_USB_GADGET_DEBUG_FILES */ | |
1230 | ||
1231 | /*-------------------------------------------------------------------------*/ | |
1232 | ||
1233 | static void udc_reinit (struct goku_udc *dev) | |
1234 | { | |
1235 | static char *names [] = { "ep0", "ep1-bulk", "ep2-bulk", "ep3-bulk" }; | |
2d70c99b | 1236 | |
1da177e4 LT |
1237 | unsigned i; |
1238 | ||
1239 | INIT_LIST_HEAD (&dev->gadget.ep_list); | |
1240 | dev->gadget.ep0 = &dev->ep [0].ep; | |
1241 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
1242 | dev->ep0state = EP0_DISCONNECT; | |
1243 | dev->irqs = 0; | |
1244 | ||
1245 | for (i = 0; i < 4; i++) { | |
1246 | struct goku_ep *ep = &dev->ep[i]; | |
1247 | ||
1248 | ep->num = i; | |
1249 | ep->ep.name = names[i]; | |
1250 | ep->reg_fifo = &dev->regs->ep_fifo [i]; | |
1251 | ep->reg_status = &dev->regs->ep_status [i]; | |
1252 | ep->reg_mode = &dev->regs->ep_mode[i]; | |
1253 | ||
1254 | ep->ep.ops = &goku_ep_ops; | |
1255 | list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list); | |
1256 | ep->dev = dev; | |
1257 | INIT_LIST_HEAD (&ep->queue); | |
1258 | ||
1259 | ep_reset(NULL, ep); | |
1260 | } | |
1261 | ||
1262 | dev->ep[0].reg_mode = NULL; | |
1263 | dev->ep[0].ep.maxpacket = MAX_EP0_SIZE; | |
1264 | list_del_init (&dev->ep[0].ep.ep_list); | |
1265 | } | |
1266 | ||
1267 | static void udc_reset(struct goku_udc *dev) | |
1268 | { | |
1269 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1270 | ||
1271 | writel(0, ®s->power_detect); | |
1272 | writel(0, ®s->int_enable); | |
1273 | readl(®s->int_enable); | |
1274 | dev->int_enable = 0; | |
1275 | ||
1276 | /* deassert reset, leave USB D+ at hi-Z (no pullup) | |
1277 | * don't let INT_PWRDETECT sequence begin | |
1278 | */ | |
1279 | udelay(250); | |
1280 | writel(PW_RESETB, ®s->power_detect); | |
1281 | readl(®s->int_enable); | |
1282 | } | |
1283 | ||
1284 | static void ep0_start(struct goku_udc *dev) | |
1285 | { | |
1286 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1287 | unsigned i; | |
1288 | ||
441b62c1 | 1289 | VDBG(dev, "%s\n", __func__); |
1da177e4 LT |
1290 | |
1291 | udc_reset(dev); | |
1292 | udc_reinit (dev); | |
1293 | //writel(MST_EOPB_ENA | MST_TIMEOUT_ENA, ®s->dma_master); | |
1294 | ||
1295 | /* hw handles set_address, set_feature, get_status; maybe more */ | |
1296 | writel( G_REQMODE_SET_INTF | G_REQMODE_GET_INTF | |
1297 | | G_REQMODE_SET_CONF | G_REQMODE_GET_CONF | |
1298 | | G_REQMODE_GET_DESC | |
1299 | | G_REQMODE_CLEAR_FEAT | |
1300 | , ®s->reqmode); | |
1301 | ||
1302 | for (i = 0; i < 4; i++) | |
1303 | dev->ep[i].irqs = 0; | |
1304 | ||
1305 | /* can't modify descriptors after writing UsbReady */ | |
1306 | for (i = 0; i < DESC_LEN; i++) | |
1307 | writel(0, ®s->descriptors[i]); | |
1308 | writel(0, ®s->UsbReady); | |
1309 | ||
1310 | /* expect ep0 requests when the host drops reset */ | |
1311 | writel(PW_RESETB | PW_PULLUP, ®s->power_detect); | |
1312 | dev->int_enable = INT_DEVWIDE | INT_EP0; | |
1313 | writel(dev->int_enable, &dev->regs->int_enable); | |
1314 | readl(®s->int_enable); | |
1315 | dev->gadget.speed = USB_SPEED_FULL; | |
1316 | dev->ep0state = EP0_IDLE; | |
1317 | } | |
1318 | ||
1319 | static void udc_enable(struct goku_udc *dev) | |
1320 | { | |
1321 | /* start enumeration now, or after power detect irq */ | |
1322 | if (readl(&dev->regs->power_detect) & PW_DETECT) | |
1323 | ep0_start(dev); | |
1324 | else { | |
441b62c1 | 1325 | DBG(dev, "%s\n", __func__); |
1da177e4 LT |
1326 | dev->int_enable = INT_PWRDETECT; |
1327 | writel(dev->int_enable, &dev->regs->int_enable); | |
1328 | } | |
1329 | } | |
1330 | ||
1331 | /*-------------------------------------------------------------------------*/ | |
1332 | ||
1333 | /* keeping it simple: | |
1334 | * - one bus driver, initted first; | |
1335 | * - one function driver, initted second | |
1336 | */ | |
1337 | ||
1338 | static struct goku_udc *the_controller; | |
1339 | ||
1340 | /* when a driver is successfully registered, it will receive | |
1341 | * control requests including set_configuration(), which enables | |
1342 | * non-control requests. then usb traffic follows until a | |
1343 | * disconnect is reported. then a host may connect again, or | |
1344 | * the driver might get unbound. | |
1345 | */ | |
1346 | int usb_gadget_register_driver(struct usb_gadget_driver *driver) | |
1347 | { | |
1348 | struct goku_udc *dev = the_controller; | |
1349 | int retval; | |
1350 | ||
1351 | if (!driver | |
32e7fea2 | 1352 | || driver->speed < USB_SPEED_FULL |
1da177e4 | 1353 | || !driver->bind |
1da177e4 LT |
1354 | || !driver->disconnect |
1355 | || !driver->setup) | |
1356 | return -EINVAL; | |
1357 | if (!dev) | |
1358 | return -ENODEV; | |
1359 | if (dev->driver) | |
1360 | return -EBUSY; | |
1361 | ||
1362 | /* hook up the driver */ | |
1363 | driver->driver.bus = NULL; | |
1364 | dev->driver = driver; | |
1365 | dev->gadget.dev.driver = &driver->driver; | |
1366 | retval = driver->bind(&dev->gadget); | |
1367 | if (retval) { | |
1368 | DBG(dev, "bind to driver %s --> error %d\n", | |
1369 | driver->driver.name, retval); | |
1370 | dev->driver = NULL; | |
1371 | dev->gadget.dev.driver = NULL; | |
1372 | return retval; | |
1373 | } | |
1374 | ||
1375 | /* then enable host detection and ep0; and we're ready | |
1376 | * for set_configuration as well as eventual disconnect. | |
1377 | */ | |
1378 | udc_enable(dev); | |
1379 | ||
1380 | DBG(dev, "registered gadget driver '%s'\n", driver->driver.name); | |
1381 | return 0; | |
1382 | } | |
1383 | EXPORT_SYMBOL(usb_gadget_register_driver); | |
1384 | ||
1385 | static void | |
1386 | stop_activity(struct goku_udc *dev, struct usb_gadget_driver *driver) | |
1387 | { | |
1388 | unsigned i; | |
1389 | ||
441b62c1 | 1390 | DBG (dev, "%s\n", __func__); |
1da177e4 LT |
1391 | |
1392 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1393 | driver = NULL; | |
1394 | ||
1395 | /* disconnect gadget driver after quiesceing hw and the driver */ | |
1396 | udc_reset (dev); | |
1397 | for (i = 0; i < 4; i++) | |
1398 | nuke(&dev->ep [i], -ESHUTDOWN); | |
1399 | if (driver) { | |
1400 | spin_unlock(&dev->lock); | |
1401 | driver->disconnect(&dev->gadget); | |
1402 | spin_lock(&dev->lock); | |
1403 | } | |
1404 | ||
1405 | if (dev->driver) | |
1406 | udc_enable(dev); | |
1407 | } | |
1408 | ||
1409 | int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) | |
1410 | { | |
1411 | struct goku_udc *dev = the_controller; | |
1412 | unsigned long flags; | |
1413 | ||
1414 | if (!dev) | |
1415 | return -ENODEV; | |
6bea476c | 1416 | if (!driver || driver != dev->driver || !driver->unbind) |
1da177e4 LT |
1417 | return -EINVAL; |
1418 | ||
1419 | spin_lock_irqsave(&dev->lock, flags); | |
1420 | dev->driver = NULL; | |
1421 | stop_activity(dev, driver); | |
1422 | spin_unlock_irqrestore(&dev->lock, flags); | |
1423 | ||
1424 | driver->unbind(&dev->gadget); | |
eb0be47d | 1425 | dev->gadget.dev.driver = NULL; |
1da177e4 LT |
1426 | |
1427 | DBG(dev, "unregistered driver '%s'\n", driver->driver.name); | |
1428 | return 0; | |
1429 | } | |
1430 | EXPORT_SYMBOL(usb_gadget_unregister_driver); | |
1431 | ||
1432 | ||
1433 | /*-------------------------------------------------------------------------*/ | |
1434 | ||
1435 | static void ep0_setup(struct goku_udc *dev) | |
1436 | { | |
1437 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1438 | struct usb_ctrlrequest ctrl; | |
1439 | int tmp; | |
1440 | ||
1441 | /* read SETUP packet and enter DATA stage */ | |
1442 | ctrl.bRequestType = readl(®s->bRequestType); | |
1443 | ctrl.bRequest = readl(®s->bRequest); | |
988199fe DB |
1444 | ctrl.wValue = cpu_to_le16((readl(®s->wValueH) << 8) |
1445 | | readl(®s->wValueL)); | |
1446 | ctrl.wIndex = cpu_to_le16((readl(®s->wIndexH) << 8) | |
1447 | | readl(®s->wIndexL)); | |
1448 | ctrl.wLength = cpu_to_le16((readl(®s->wLengthH) << 8) | |
1449 | | readl(®s->wLengthL)); | |
1da177e4 LT |
1450 | writel(0, ®s->SetupRecv); |
1451 | ||
1452 | nuke(&dev->ep[0], 0); | |
1453 | dev->ep[0].stopped = 0; | |
1454 | if (likely(ctrl.bRequestType & USB_DIR_IN)) { | |
1455 | dev->ep[0].is_in = 1; | |
1456 | dev->ep0state = EP0_IN; | |
1457 | /* detect early status stages */ | |
1458 | writel(ICONTROL_STATUSNAK, &dev->regs->IntControl); | |
1459 | } else { | |
1460 | dev->ep[0].is_in = 0; | |
1461 | dev->ep0state = EP0_OUT; | |
1462 | ||
1463 | /* NOTE: CLEAR_FEATURE is done in software so that we can | |
1464 | * synchronize transfer restarts after bulk IN stalls. data | |
1465 | * won't even enter the fifo until the halt is cleared. | |
1466 | */ | |
1467 | switch (ctrl.bRequest) { | |
1468 | case USB_REQ_CLEAR_FEATURE: | |
1469 | switch (ctrl.bRequestType) { | |
1470 | case USB_RECIP_ENDPOINT: | |
988199fe | 1471 | tmp = le16_to_cpu(ctrl.wIndex) & 0x0f; |
1da177e4 LT |
1472 | /* active endpoint */ |
1473 | if (tmp > 3 || (!dev->ep[tmp].desc && tmp != 0)) | |
1474 | goto stall; | |
551509d2 | 1475 | if (ctrl.wIndex & cpu_to_le16( |
988199fe | 1476 | USB_DIR_IN)) { |
1da177e4 LT |
1477 | if (!dev->ep[tmp].is_in) |
1478 | goto stall; | |
1479 | } else { | |
1480 | if (dev->ep[tmp].is_in) | |
1481 | goto stall; | |
1482 | } | |
551509d2 | 1483 | if (ctrl.wValue != cpu_to_le16( |
988199fe | 1484 | USB_ENDPOINT_HALT)) |
1da177e4 LT |
1485 | goto stall; |
1486 | if (tmp) | |
1487 | goku_clear_halt(&dev->ep[tmp]); | |
1488 | succeed: | |
1489 | /* start ep0out status stage */ | |
1490 | writel(~(1<<0), ®s->EOP); | |
1491 | dev->ep[0].stopped = 1; | |
1492 | dev->ep0state = EP0_STATUS; | |
1493 | return; | |
1494 | case USB_RECIP_DEVICE: | |
1495 | /* device remote wakeup: always clear */ | |
551509d2 | 1496 | if (ctrl.wValue != cpu_to_le16(1)) |
1da177e4 LT |
1497 | goto stall; |
1498 | VDBG(dev, "clear dev remote wakeup\n"); | |
1499 | goto succeed; | |
1500 | case USB_RECIP_INTERFACE: | |
1501 | goto stall; | |
1502 | default: /* pass to gadget driver */ | |
1503 | break; | |
1504 | } | |
1505 | break; | |
1506 | default: | |
1507 | break; | |
1508 | } | |
1509 | } | |
1510 | ||
1511 | #ifdef USB_TRACE | |
1512 | VDBG(dev, "SETUP %02x.%02x v%04x i%04x l%04x\n", | |
1513 | ctrl.bRequestType, ctrl.bRequest, | |
988199fe DB |
1514 | le16_to_cpu(ctrl.wValue), le16_to_cpu(ctrl.wIndex), |
1515 | le16_to_cpu(ctrl.wLength)); | |
1da177e4 LT |
1516 | #endif |
1517 | ||
1518 | /* hw wants to know when we're configured (or not) */ | |
1519 | dev->req_config = (ctrl.bRequest == USB_REQ_SET_CONFIGURATION | |
1520 | && ctrl.bRequestType == USB_RECIP_DEVICE); | |
1521 | if (unlikely(dev->req_config)) | |
551509d2 | 1522 | dev->configured = (ctrl.wValue != cpu_to_le16(0)); |
1da177e4 LT |
1523 | |
1524 | /* delegate everything to the gadget driver. | |
1525 | * it may respond after this irq handler returns. | |
1526 | */ | |
1527 | spin_unlock (&dev->lock); | |
1528 | tmp = dev->driver->setup(&dev->gadget, &ctrl); | |
1529 | spin_lock (&dev->lock); | |
1530 | if (unlikely(tmp < 0)) { | |
1531 | stall: | |
1532 | #ifdef USB_TRACE | |
1533 | VDBG(dev, "req %02x.%02x protocol STALL; err %d\n", | |
1534 | ctrl.bRequestType, ctrl.bRequest, tmp); | |
1535 | #endif | |
1536 | command(regs, COMMAND_STALL, 0); | |
1537 | dev->ep[0].stopped = 1; | |
1538 | dev->ep0state = EP0_STALL; | |
1539 | } | |
1540 | ||
1541 | /* expect at least one data or status stage irq */ | |
1542 | } | |
1543 | ||
1544 | #define ACK(irqbit) { \ | |
1545 | stat &= ~irqbit; \ | |
1546 | writel(~irqbit, ®s->int_status); \ | |
1547 | handled = 1; \ | |
1548 | } | |
1549 | ||
7d12e780 | 1550 | static irqreturn_t goku_irq(int irq, void *_dev) |
1da177e4 LT |
1551 | { |
1552 | struct goku_udc *dev = _dev; | |
1553 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1554 | struct goku_ep *ep; | |
1555 | u32 stat, handled = 0; | |
1556 | unsigned i, rescans = 5; | |
1557 | ||
1558 | spin_lock(&dev->lock); | |
1559 | ||
1560 | rescan: | |
1561 | stat = readl(®s->int_status) & dev->int_enable; | |
1562 | if (!stat) | |
1563 | goto done; | |
1564 | dev->irqs++; | |
1565 | ||
1566 | /* device-wide irqs */ | |
1567 | if (unlikely(stat & INT_DEVWIDE)) { | |
1568 | if (stat & INT_SYSERROR) { | |
1569 | ERROR(dev, "system error\n"); | |
1570 | stop_activity(dev, dev->driver); | |
1571 | stat = 0; | |
1572 | handled = 1; | |
1573 | // FIXME have a neater way to prevent re-enumeration | |
1574 | dev->driver = NULL; | |
1575 | goto done; | |
1576 | } | |
1577 | if (stat & INT_PWRDETECT) { | |
1578 | writel(~stat, ®s->int_status); | |
1579 | if (readl(&dev->regs->power_detect) & PW_DETECT) { | |
1580 | VDBG(dev, "connect\n"); | |
1581 | ep0_start(dev); | |
1582 | } else { | |
1583 | DBG(dev, "disconnect\n"); | |
1584 | if (dev->gadget.speed == USB_SPEED_FULL) | |
1585 | stop_activity(dev, dev->driver); | |
1586 | dev->ep0state = EP0_DISCONNECT; | |
1587 | dev->int_enable = INT_DEVWIDE; | |
1588 | writel(dev->int_enable, &dev->regs->int_enable); | |
1589 | } | |
1590 | stat = 0; | |
1591 | handled = 1; | |
1592 | goto done; | |
1593 | } | |
1594 | if (stat & INT_SUSPEND) { | |
1595 | ACK(INT_SUSPEND); | |
1596 | if (readl(®s->ep_status[0]) & EPxSTATUS_SUSPEND) { | |
1597 | switch (dev->ep0state) { | |
1598 | case EP0_DISCONNECT: | |
1599 | case EP0_SUSPEND: | |
1600 | goto pm_next; | |
1601 | default: | |
1602 | break; | |
1603 | } | |
1604 | DBG(dev, "USB suspend\n"); | |
1605 | dev->ep0state = EP0_SUSPEND; | |
1606 | if (dev->gadget.speed != USB_SPEED_UNKNOWN | |
1607 | && dev->driver | |
1608 | && dev->driver->suspend) { | |
1609 | spin_unlock(&dev->lock); | |
1610 | dev->driver->suspend(&dev->gadget); | |
1611 | spin_lock(&dev->lock); | |
1612 | } | |
1613 | } else { | |
1614 | if (dev->ep0state != EP0_SUSPEND) { | |
1615 | DBG(dev, "bogus USB resume %d\n", | |
1616 | dev->ep0state); | |
1617 | goto pm_next; | |
1618 | } | |
1619 | DBG(dev, "USB resume\n"); | |
1620 | dev->ep0state = EP0_IDLE; | |
1621 | if (dev->gadget.speed != USB_SPEED_UNKNOWN | |
1622 | && dev->driver | |
1623 | && dev->driver->resume) { | |
1624 | spin_unlock(&dev->lock); | |
1625 | dev->driver->resume(&dev->gadget); | |
1626 | spin_lock(&dev->lock); | |
1627 | } | |
1628 | } | |
1629 | } | |
1630 | pm_next: | |
1631 | if (stat & INT_USBRESET) { /* hub reset done */ | |
1632 | ACK(INT_USBRESET); | |
1633 | INFO(dev, "USB reset done, gadget %s\n", | |
1634 | dev->driver->driver.name); | |
1635 | } | |
1636 | // and INT_ERR on some endpoint's crc/bitstuff/... problem | |
1637 | } | |
1638 | ||
1639 | /* progress ep0 setup, data, or status stages. | |
1640 | * no transition {EP0_STATUS, EP0_STALL} --> EP0_IDLE; saves irqs | |
1641 | */ | |
1642 | if (stat & INT_SETUP) { | |
1643 | ACK(INT_SETUP); | |
1644 | dev->ep[0].irqs++; | |
1645 | ep0_setup(dev); | |
1646 | } | |
1647 | if (stat & INT_STATUSNAK) { | |
1648 | ACK(INT_STATUSNAK|INT_ENDPOINT0); | |
1649 | if (dev->ep0state == EP0_IN) { | |
1650 | ep = &dev->ep[0]; | |
1651 | ep->irqs++; | |
1652 | nuke(ep, 0); | |
1653 | writel(~(1<<0), ®s->EOP); | |
1654 | dev->ep0state = EP0_STATUS; | |
1655 | } | |
1656 | } | |
1657 | if (stat & INT_ENDPOINT0) { | |
1658 | ACK(INT_ENDPOINT0); | |
1659 | ep = &dev->ep[0]; | |
1660 | ep->irqs++; | |
1661 | pio_advance(ep); | |
1662 | } | |
1663 | ||
1664 | /* dma completion */ | |
1665 | if (stat & INT_MSTRDEND) { /* IN */ | |
1666 | ACK(INT_MSTRDEND); | |
1667 | ep = &dev->ep[UDC_MSTRD_ENDPOINT]; | |
1668 | ep->irqs++; | |
1669 | dma_advance(dev, ep); | |
1670 | } | |
1671 | if (stat & INT_MSTWREND) { /* OUT */ | |
1672 | ACK(INT_MSTWREND); | |
1673 | ep = &dev->ep[UDC_MSTWR_ENDPOINT]; | |
1674 | ep->irqs++; | |
1675 | dma_advance(dev, ep); | |
1676 | } | |
1677 | if (stat & INT_MSTWRTMOUT) { /* OUT */ | |
1678 | ACK(INT_MSTWRTMOUT); | |
1679 | ep = &dev->ep[UDC_MSTWR_ENDPOINT]; | |
1680 | ep->irqs++; | |
1681 | ERROR(dev, "%s write timeout ?\n", ep->ep.name); | |
1682 | // reset dma? then dma_advance() | |
1683 | } | |
1684 | ||
1685 | /* pio */ | |
1686 | for (i = 1; i < 4; i++) { | |
1687 | u32 tmp = INT_EPxDATASET(i); | |
1688 | ||
1689 | if (!(stat & tmp)) | |
1690 | continue; | |
1691 | ep = &dev->ep[i]; | |
1692 | pio_advance(ep); | |
1693 | if (list_empty (&ep->queue)) | |
1694 | pio_irq_disable(dev, regs, i); | |
1695 | stat &= ~tmp; | |
1696 | handled = 1; | |
1697 | ep->irqs++; | |
1698 | } | |
1699 | ||
1700 | if (rescans--) | |
1701 | goto rescan; | |
1702 | ||
1703 | done: | |
1704 | (void)readl(®s->int_enable); | |
1705 | spin_unlock(&dev->lock); | |
1706 | if (stat) | |
1707 | DBG(dev, "unhandled irq status: %05x (%05x, %05x)\n", stat, | |
1708 | readl(®s->int_status), dev->int_enable); | |
1709 | return IRQ_RETVAL(handled); | |
1710 | } | |
1711 | ||
1712 | #undef ACK | |
1713 | ||
1714 | /*-------------------------------------------------------------------------*/ | |
1715 | ||
1716 | static void gadget_release(struct device *_dev) | |
1717 | { | |
1718 | struct goku_udc *dev = dev_get_drvdata(_dev); | |
1719 | ||
1720 | kfree(dev); | |
1721 | } | |
1722 | ||
1723 | /* tear down the binding between this driver and the pci device */ | |
1724 | ||
1725 | static void goku_remove(struct pci_dev *pdev) | |
1726 | { | |
1727 | struct goku_udc *dev = pci_get_drvdata(pdev); | |
1728 | ||
441b62c1 | 1729 | DBG(dev, "%s\n", __func__); |
6bea476c DB |
1730 | |
1731 | BUG_ON(dev->driver); | |
1da177e4 LT |
1732 | |
1733 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
1734 | remove_proc_entry(proc_node_name, NULL); | |
1735 | #endif | |
1736 | if (dev->regs) | |
1737 | udc_reset(dev); | |
1738 | if (dev->got_irq) | |
1739 | free_irq(pdev->irq, dev); | |
1740 | if (dev->regs) | |
1741 | iounmap(dev->regs); | |
1742 | if (dev->got_region) | |
1743 | release_mem_region(pci_resource_start (pdev, 0), | |
1744 | pci_resource_len (pdev, 0)); | |
1745 | if (dev->enabled) | |
1746 | pci_disable_device(pdev); | |
1747 | device_unregister(&dev->gadget.dev); | |
1748 | ||
1749 | pci_set_drvdata(pdev, NULL); | |
1750 | dev->regs = NULL; | |
1751 | the_controller = NULL; | |
1752 | ||
1753 | INFO(dev, "unbind\n"); | |
1754 | } | |
1755 | ||
1756 | /* wrap this driver around the specified pci device, but | |
1757 | * don't respond over USB until a gadget driver binds to us. | |
1758 | */ | |
1759 | ||
1760 | static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id) | |
1761 | { | |
1762 | struct goku_udc *dev = NULL; | |
1763 | unsigned long resource, len; | |
1764 | void __iomem *base = NULL; | |
1765 | int retval; | |
1da177e4 LT |
1766 | |
1767 | /* if you want to support more than one controller in a system, | |
1768 | * usb_gadget_driver_{register,unregister}() must change. | |
1769 | */ | |
1770 | if (the_controller) { | |
b6c63937 | 1771 | WARNING(dev, "ignoring %s\n", pci_name(pdev)); |
1da177e4 LT |
1772 | return -EBUSY; |
1773 | } | |
1774 | if (!pdev->irq) { | |
1775 | printk(KERN_ERR "Check PCI %s IRQ setup!\n", pci_name(pdev)); | |
1776 | retval = -ENODEV; | |
1777 | goto done; | |
1778 | } | |
1779 | ||
1780 | /* alloc, and start init */ | |
dd00cc48 | 1781 | dev = kzalloc (sizeof *dev, GFP_KERNEL); |
1da177e4 LT |
1782 | if (dev == NULL){ |
1783 | pr_debug("enomem %s\n", pci_name(pdev)); | |
1784 | retval = -ENOMEM; | |
1785 | goto done; | |
1786 | } | |
1787 | ||
1da177e4 LT |
1788 | spin_lock_init(&dev->lock); |
1789 | dev->pdev = pdev; | |
1790 | dev->gadget.ops = &goku_ops; | |
1791 | ||
1792 | /* the "gadget" abstracts/virtualizes the controller */ | |
0031a06e | 1793 | dev_set_name(&dev->gadget.dev, "gadget"); |
1da177e4 LT |
1794 | dev->gadget.dev.parent = &pdev->dev; |
1795 | dev->gadget.dev.dma_mask = pdev->dev.dma_mask; | |
1796 | dev->gadget.dev.release = gadget_release; | |
1797 | dev->gadget.name = driver_name; | |
1798 | ||
1799 | /* now all the pci goodies ... */ | |
1800 | retval = pci_enable_device(pdev); | |
1801 | if (retval < 0) { | |
1802 | DBG(dev, "can't enable, %d\n", retval); | |
1803 | goto done; | |
1804 | } | |
1805 | dev->enabled = 1; | |
1806 | ||
1807 | resource = pci_resource_start(pdev, 0); | |
1808 | len = pci_resource_len(pdev, 0); | |
1809 | if (!request_mem_region(resource, len, driver_name)) { | |
1810 | DBG(dev, "controller already in use\n"); | |
1811 | retval = -EBUSY; | |
1812 | goto done; | |
1813 | } | |
1814 | dev->got_region = 1; | |
1815 | ||
1816 | base = ioremap_nocache(resource, len); | |
1817 | if (base == NULL) { | |
1818 | DBG(dev, "can't map memory\n"); | |
1819 | retval = -EFAULT; | |
1820 | goto done; | |
1821 | } | |
1822 | dev->regs = (struct goku_udc_regs __iomem *) base; | |
1823 | ||
1824 | pci_set_drvdata(pdev, dev); | |
1825 | INFO(dev, "%s\n", driver_desc); | |
1826 | INFO(dev, "version: " DRIVER_VERSION " %s\n", dmastr()); | |
c6387a48 | 1827 | INFO(dev, "irq %d, pci mem %p\n", pdev->irq, base); |
1da177e4 LT |
1828 | |
1829 | /* init to known state, then setup irqs */ | |
1830 | udc_reset(dev); | |
1831 | udc_reinit (dev); | |
d54b5caa | 1832 | if (request_irq(pdev->irq, goku_irq, IRQF_SHARED/*|IRQF_SAMPLE_RANDOM*/, |
1da177e4 | 1833 | driver_name, dev) != 0) { |
c6387a48 | 1834 | DBG(dev, "request interrupt %d failed\n", pdev->irq); |
1da177e4 LT |
1835 | retval = -EBUSY; |
1836 | goto done; | |
1837 | } | |
1838 | dev->got_irq = 1; | |
1839 | if (use_dma) | |
1840 | pci_set_master(pdev); | |
1841 | ||
1842 | ||
1843 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
1844 | create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev); | |
1845 | #endif | |
1846 | ||
1847 | /* done */ | |
1848 | the_controller = dev; | |
2d70c99b DB |
1849 | retval = device_register(&dev->gadget.dev); |
1850 | if (retval == 0) | |
1851 | return 0; | |
1da177e4 LT |
1852 | |
1853 | done: | |
1854 | if (dev) | |
1855 | goku_remove (pdev); | |
1856 | return retval; | |
1857 | } | |
1858 | ||
1859 | ||
1860 | /*-------------------------------------------------------------------------*/ | |
1861 | ||
1862 | static struct pci_device_id pci_ids [] = { { | |
2d70c99b DB |
1863 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), |
1864 | .class_mask = ~0, | |
1da177e4 LT |
1865 | .vendor = 0x102f, /* Toshiba */ |
1866 | .device = 0x0107, /* this UDC */ | |
1867 | .subvendor = PCI_ANY_ID, | |
1868 | .subdevice = PCI_ANY_ID, | |
1869 | ||
1870 | }, { /* end: all zeroes */ } | |
1871 | }; | |
1872 | MODULE_DEVICE_TABLE (pci, pci_ids); | |
1873 | ||
1874 | static struct pci_driver goku_pci_driver = { | |
1875 | .name = (char *) driver_name, | |
1876 | .id_table = pci_ids, | |
1877 | ||
1878 | .probe = goku_probe, | |
1879 | .remove = goku_remove, | |
1880 | ||
1881 | /* FIXME add power management support */ | |
1882 | }; | |
1883 | ||
1884 | static int __init init (void) | |
1885 | { | |
1886 | return pci_register_driver (&goku_pci_driver); | |
1887 | } | |
1888 | module_init (init); | |
1889 | ||
1890 | static void __exit cleanup (void) | |
1891 | { | |
1892 | pci_unregister_driver (&goku_pci_driver); | |
1893 | } | |
1894 | module_exit (cleanup); |