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> |
268bb0ce | 41 | #include <linux/prefetch.h> |
1da177e4 LT |
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; | |
9ab15651 | 114 | if (ep->num != usb_endpoint_num(desc)) |
1da177e4 LT |
115 | return -EINVAL; |
116 | ||
9ab15651 | 117 | switch (usb_endpoint_type(desc)) { |
1da177e4 LT |
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; | |
a5abdeaf | 131 | max = get_unaligned_le16(&desc->wMaxPacketSize); |
1da177e4 LT |
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 | */ | |
9ab15651 | 146 | ep->is_in = usb_endpoint_dir_in(desc); |
1da177e4 LT |
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]); | |
2d70c99b | 443 | if (!(size & PACKET_ACTIVE)) /* "can't happen" */ |
1da177e4 LT |
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 | ||
441b62c1 | 696 | VDBG(ep->dev, "%s %s %s %d/%d\n", __func__, ep->ep.name, |
1da177e4 LT |
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 | ||
441b62c1 | 830 | VDBG(dev, "%s %s %s %s %p\n", __func__, _ep->name, |
1da177e4 LT |
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) { | |
441b62c1 | 902 | DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name); |
1da177e4 LT |
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; | |
441b62c1 | 944 | VDBG(ep->dev, "%s %s %u\n", __func__, ep->ep.name, size); |
1da177e4 LT |
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); | |
441b62c1 | 957 | VDBG(ep->dev, "%s %s\n", __func__, ep->ep.name); |
1da177e4 LT |
958 | |
959 | /* don't change EPxSTATUS_EP_INVALID to READY */ | |
960 | if (!ep->desc && ep->num != 0) { | |
441b62c1 | 961 | DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name); |
1da177e4 LT |
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 | ||
0f91349b SAS |
999 | static int goku_start(struct usb_gadget_driver *driver, |
1000 | int (*bind)(struct usb_gadget *)); | |
1001 | static int goku_stop(struct usb_gadget_driver *driver); | |
1002 | ||
1da177e4 LT |
1003 | static const struct usb_gadget_ops goku_ops = { |
1004 | .get_frame = goku_get_frame, | |
0f91349b SAS |
1005 | .start = goku_start, |
1006 | .stop = goku_stop, | |
1da177e4 LT |
1007 | // no remote wakeup |
1008 | // not selfpowered | |
1009 | }; | |
1010 | ||
1011 | /*-------------------------------------------------------------------------*/ | |
1012 | ||
1013 | static inline char *dmastr(void) | |
1014 | { | |
1015 | if (use_dma == 0) | |
1016 | return "(dma disabled)"; | |
1017 | else if (use_dma == 2) | |
1018 | return "(dma IN and OUT)"; | |
1019 | else | |
1020 | return "(dma IN)"; | |
1021 | } | |
1022 | ||
1023 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
1024 | ||
1025 | static const char proc_node_name [] = "driver/udc"; | |
1026 | ||
1027 | #define FOURBITS "%s%s%s%s" | |
1028 | #define EIGHTBITS FOURBITS FOURBITS | |
1029 | ||
1030 | static void | |
1031 | dump_intmask(const char *label, u32 mask, char **next, unsigned *size) | |
1032 | { | |
1033 | int t; | |
1034 | ||
1035 | /* int_status is the same format ... */ | |
1036 | t = scnprintf(*next, *size, | |
1037 | "%s %05X =" FOURBITS EIGHTBITS EIGHTBITS "\n", | |
1038 | label, mask, | |
1039 | (mask & INT_PWRDETECT) ? " power" : "", | |
1040 | (mask & INT_SYSERROR) ? " sys" : "", | |
1041 | (mask & INT_MSTRDEND) ? " in-dma" : "", | |
1042 | (mask & INT_MSTWRTMOUT) ? " wrtmo" : "", | |
1043 | ||
1044 | (mask & INT_MSTWREND) ? " out-dma" : "", | |
1045 | (mask & INT_MSTWRSET) ? " wrset" : "", | |
1046 | (mask & INT_ERR) ? " err" : "", | |
1047 | (mask & INT_SOF) ? " sof" : "", | |
1048 | ||
1049 | (mask & INT_EP3NAK) ? " ep3nak" : "", | |
1050 | (mask & INT_EP2NAK) ? " ep2nak" : "", | |
1051 | (mask & INT_EP1NAK) ? " ep1nak" : "", | |
1052 | (mask & INT_EP3DATASET) ? " ep3" : "", | |
1053 | ||
1054 | (mask & INT_EP2DATASET) ? " ep2" : "", | |
1055 | (mask & INT_EP1DATASET) ? " ep1" : "", | |
1056 | (mask & INT_STATUSNAK) ? " ep0snak" : "", | |
1057 | (mask & INT_STATUS) ? " ep0status" : "", | |
1058 | ||
1059 | (mask & INT_SETUP) ? " setup" : "", | |
1060 | (mask & INT_ENDPOINT0) ? " ep0" : "", | |
1061 | (mask & INT_USBRESET) ? " reset" : "", | |
1062 | (mask & INT_SUSPEND) ? " suspend" : ""); | |
1063 | *size -= t; | |
1064 | *next += t; | |
1065 | } | |
1066 | ||
1067 | ||
1068 | static int | |
1069 | udc_proc_read(char *buffer, char **start, off_t off, int count, | |
1070 | int *eof, void *_dev) | |
1071 | { | |
1072 | char *buf = buffer; | |
1073 | struct goku_udc *dev = _dev; | |
1074 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1075 | char *next = buf; | |
1076 | unsigned size = count; | |
1077 | unsigned long flags; | |
1078 | int i, t, is_usb_connected; | |
1079 | u32 tmp; | |
1080 | ||
1081 | if (off != 0) | |
1082 | return 0; | |
1083 | ||
1084 | local_irq_save(flags); | |
1085 | ||
1086 | /* basic device status */ | |
1087 | tmp = readl(®s->power_detect); | |
1088 | is_usb_connected = tmp & PW_DETECT; | |
1089 | t = scnprintf(next, size, | |
1090 | "%s - %s\n" | |
1091 | "%s version: %s %s\n" | |
1092 | "Gadget driver: %s\n" | |
1093 | "Host %s, %s\n" | |
1094 | "\n", | |
1095 | pci_name(dev->pdev), driver_desc, | |
1096 | driver_name, DRIVER_VERSION, dmastr(), | |
1097 | dev->driver ? dev->driver->driver.name : "(none)", | |
1098 | is_usb_connected | |
1099 | ? ((tmp & PW_PULLUP) ? "full speed" : "powered") | |
1100 | : "disconnected", | |
2d70c99b | 1101 | ({char *state; |
1da177e4 | 1102 | switch(dev->ep0state){ |
2d70c99b DB |
1103 | case EP0_DISCONNECT: state = "ep0_disconnect"; break; |
1104 | case EP0_IDLE: state = "ep0_idle"; break; | |
1105 | case EP0_IN: state = "ep0_in"; break; | |
1106 | case EP0_OUT: state = "ep0_out"; break; | |
1107 | case EP0_STATUS: state = "ep0_status"; break; | |
1108 | case EP0_STALL: state = "ep0_stall"; break; | |
1109 | case EP0_SUSPEND: state = "ep0_suspend"; break; | |
1110 | default: state = "ep0_?"; break; | |
1111 | } state; }) | |
1da177e4 LT |
1112 | ); |
1113 | size -= t; | |
1114 | next += t; | |
1115 | ||
1116 | dump_intmask("int_status", readl(®s->int_status), &next, &size); | |
1117 | dump_intmask("int_enable", readl(®s->int_enable), &next, &size); | |
1118 | ||
1119 | if (!is_usb_connected || !dev->driver || (tmp & PW_PULLUP) == 0) | |
1120 | goto done; | |
1121 | ||
1122 | /* registers for (active) device and ep0 */ | |
1123 | t = scnprintf(next, size, "\nirqs %lu\ndataset %02x " | |
1124 | "single.bcs %02x.%02x state %x addr %u\n", | |
1125 | dev->irqs, readl(®s->DataSet), | |
1126 | readl(®s->EPxSingle), readl(®s->EPxBCS), | |
1127 | readl(®s->UsbState), | |
1128 | readl(®s->address)); | |
1129 | size -= t; | |
1130 | next += t; | |
1131 | ||
1132 | tmp = readl(®s->dma_master); | |
1133 | t = scnprintf(next, size, | |
1134 | "dma %03X =" EIGHTBITS "%s %s\n", tmp, | |
1135 | (tmp & MST_EOPB_DIS) ? " eopb-" : "", | |
1136 | (tmp & MST_EOPB_ENA) ? " eopb+" : "", | |
1137 | (tmp & MST_TIMEOUT_DIS) ? " tmo-" : "", | |
1138 | (tmp & MST_TIMEOUT_ENA) ? " tmo+" : "", | |
1139 | ||
1140 | (tmp & MST_RD_EOPB) ? " eopb" : "", | |
1141 | (tmp & MST_RD_RESET) ? " in_reset" : "", | |
1142 | (tmp & MST_WR_RESET) ? " out_reset" : "", | |
1143 | (tmp & MST_RD_ENA) ? " IN" : "", | |
1144 | ||
1145 | (tmp & MST_WR_ENA) ? " OUT" : "", | |
1146 | (tmp & MST_CONNECTION) | |
1147 | ? "ep1in/ep2out" | |
1148 | : "ep1out/ep2in"); | |
1149 | size -= t; | |
1150 | next += t; | |
1151 | ||
1152 | /* dump endpoint queues */ | |
1153 | for (i = 0; i < 4; i++) { | |
1154 | struct goku_ep *ep = &dev->ep [i]; | |
1155 | struct goku_request *req; | |
1da177e4 LT |
1156 | |
1157 | if (i && !ep->desc) | |
1158 | continue; | |
1159 | ||
1160 | tmp = readl(ep->reg_status); | |
1161 | t = scnprintf(next, size, | |
1162 | "%s %s max %u %s, irqs %lu, " | |
1163 | "status %02x (%s) " FOURBITS "\n", | |
1164 | ep->ep.name, | |
1165 | ep->is_in ? "in" : "out", | |
1166 | ep->ep.maxpacket, | |
1167 | ep->dma ? "dma" : "pio", | |
1168 | ep->irqs, | |
1169 | tmp, ({ char *s; | |
1170 | switch (tmp & EPxSTATUS_EP_MASK) { | |
1171 | case EPxSTATUS_EP_READY: | |
1172 | s = "ready"; break; | |
1173 | case EPxSTATUS_EP_DATAIN: | |
1174 | s = "packet"; break; | |
1175 | case EPxSTATUS_EP_FULL: | |
1176 | s = "full"; break; | |
1177 | case EPxSTATUS_EP_TX_ERR: // host will retry | |
1178 | s = "tx_err"; break; | |
1179 | case EPxSTATUS_EP_RX_ERR: | |
1180 | s = "rx_err"; break; | |
1181 | case EPxSTATUS_EP_BUSY: /* ep0 only */ | |
1182 | s = "busy"; break; | |
1183 | case EPxSTATUS_EP_STALL: | |
1184 | s = "stall"; break; | |
1185 | case EPxSTATUS_EP_INVALID: // these "can't happen" | |
1186 | s = "invalid"; break; | |
1187 | default: | |
1188 | s = "?"; break; | |
1189 | }; s; }), | |
1190 | (tmp & EPxSTATUS_TOGGLE) ? "data1" : "data0", | |
1191 | (tmp & EPxSTATUS_SUSPEND) ? " suspend" : "", | |
1192 | (tmp & EPxSTATUS_FIFO_DISABLE) ? " disable" : "", | |
1193 | (tmp & EPxSTATUS_STAGE_ERROR) ? " ep0stat" : "" | |
1194 | ); | |
1195 | if (t <= 0 || t > size) | |
1196 | goto done; | |
1197 | size -= t; | |
1198 | next += t; | |
1199 | ||
1200 | if (list_empty(&ep->queue)) { | |
1201 | t = scnprintf(next, size, "\t(nothing queued)\n"); | |
1202 | if (t <= 0 || t > size) | |
1203 | goto done; | |
1204 | size -= t; | |
1205 | next += t; | |
1206 | continue; | |
1207 | } | |
1208 | list_for_each_entry(req, &ep->queue, queue) { | |
1209 | if (ep->dma && req->queue.prev == &ep->queue) { | |
1210 | if (i == UDC_MSTRD_ENDPOINT) | |
1211 | tmp = readl(®s->in_dma_current); | |
1212 | else | |
1213 | tmp = readl(®s->out_dma_current); | |
1214 | tmp -= req->req.dma; | |
1215 | tmp++; | |
1216 | } else | |
1217 | tmp = req->req.actual; | |
1218 | ||
1219 | t = scnprintf(next, size, | |
1220 | "\treq %p len %u/%u buf %p\n", | |
1221 | &req->req, tmp, req->req.length, | |
1222 | req->req.buf); | |
1223 | if (t <= 0 || t > size) | |
1224 | goto done; | |
1225 | size -= t; | |
1226 | next += t; | |
1227 | } | |
1228 | } | |
1229 | ||
1230 | done: | |
1231 | local_irq_restore(flags); | |
1232 | *eof = 1; | |
1233 | return count - size; | |
1234 | } | |
1235 | ||
1236 | #endif /* CONFIG_USB_GADGET_DEBUG_FILES */ | |
1237 | ||
1238 | /*-------------------------------------------------------------------------*/ | |
1239 | ||
1240 | static void udc_reinit (struct goku_udc *dev) | |
1241 | { | |
1242 | static char *names [] = { "ep0", "ep1-bulk", "ep2-bulk", "ep3-bulk" }; | |
2d70c99b | 1243 | |
1da177e4 LT |
1244 | unsigned i; |
1245 | ||
1246 | INIT_LIST_HEAD (&dev->gadget.ep_list); | |
1247 | dev->gadget.ep0 = &dev->ep [0].ep; | |
1248 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
1249 | dev->ep0state = EP0_DISCONNECT; | |
1250 | dev->irqs = 0; | |
1251 | ||
1252 | for (i = 0; i < 4; i++) { | |
1253 | struct goku_ep *ep = &dev->ep[i]; | |
1254 | ||
1255 | ep->num = i; | |
1256 | ep->ep.name = names[i]; | |
1257 | ep->reg_fifo = &dev->regs->ep_fifo [i]; | |
1258 | ep->reg_status = &dev->regs->ep_status [i]; | |
1259 | ep->reg_mode = &dev->regs->ep_mode[i]; | |
1260 | ||
1261 | ep->ep.ops = &goku_ep_ops; | |
1262 | list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list); | |
1263 | ep->dev = dev; | |
1264 | INIT_LIST_HEAD (&ep->queue); | |
1265 | ||
1266 | ep_reset(NULL, ep); | |
1267 | } | |
1268 | ||
1269 | dev->ep[0].reg_mode = NULL; | |
1270 | dev->ep[0].ep.maxpacket = MAX_EP0_SIZE; | |
1271 | list_del_init (&dev->ep[0].ep.ep_list); | |
1272 | } | |
1273 | ||
1274 | static void udc_reset(struct goku_udc *dev) | |
1275 | { | |
1276 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1277 | ||
1278 | writel(0, ®s->power_detect); | |
1279 | writel(0, ®s->int_enable); | |
1280 | readl(®s->int_enable); | |
1281 | dev->int_enable = 0; | |
1282 | ||
1283 | /* deassert reset, leave USB D+ at hi-Z (no pullup) | |
1284 | * don't let INT_PWRDETECT sequence begin | |
1285 | */ | |
1286 | udelay(250); | |
1287 | writel(PW_RESETB, ®s->power_detect); | |
1288 | readl(®s->int_enable); | |
1289 | } | |
1290 | ||
1291 | static void ep0_start(struct goku_udc *dev) | |
1292 | { | |
1293 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1294 | unsigned i; | |
1295 | ||
441b62c1 | 1296 | VDBG(dev, "%s\n", __func__); |
1da177e4 LT |
1297 | |
1298 | udc_reset(dev); | |
1299 | udc_reinit (dev); | |
1300 | //writel(MST_EOPB_ENA | MST_TIMEOUT_ENA, ®s->dma_master); | |
1301 | ||
1302 | /* hw handles set_address, set_feature, get_status; maybe more */ | |
1303 | writel( G_REQMODE_SET_INTF | G_REQMODE_GET_INTF | |
1304 | | G_REQMODE_SET_CONF | G_REQMODE_GET_CONF | |
1305 | | G_REQMODE_GET_DESC | |
1306 | | G_REQMODE_CLEAR_FEAT | |
1307 | , ®s->reqmode); | |
1308 | ||
1309 | for (i = 0; i < 4; i++) | |
1310 | dev->ep[i].irqs = 0; | |
1311 | ||
1312 | /* can't modify descriptors after writing UsbReady */ | |
1313 | for (i = 0; i < DESC_LEN; i++) | |
1314 | writel(0, ®s->descriptors[i]); | |
1315 | writel(0, ®s->UsbReady); | |
1316 | ||
1317 | /* expect ep0 requests when the host drops reset */ | |
1318 | writel(PW_RESETB | PW_PULLUP, ®s->power_detect); | |
1319 | dev->int_enable = INT_DEVWIDE | INT_EP0; | |
1320 | writel(dev->int_enable, &dev->regs->int_enable); | |
1321 | readl(®s->int_enable); | |
1322 | dev->gadget.speed = USB_SPEED_FULL; | |
1323 | dev->ep0state = EP0_IDLE; | |
1324 | } | |
1325 | ||
1326 | static void udc_enable(struct goku_udc *dev) | |
1327 | { | |
1328 | /* start enumeration now, or after power detect irq */ | |
1329 | if (readl(&dev->regs->power_detect) & PW_DETECT) | |
1330 | ep0_start(dev); | |
1331 | else { | |
441b62c1 | 1332 | DBG(dev, "%s\n", __func__); |
1da177e4 LT |
1333 | dev->int_enable = INT_PWRDETECT; |
1334 | writel(dev->int_enable, &dev->regs->int_enable); | |
1335 | } | |
1336 | } | |
1337 | ||
1338 | /*-------------------------------------------------------------------------*/ | |
1339 | ||
1340 | /* keeping it simple: | |
1341 | * - one bus driver, initted first; | |
1342 | * - one function driver, initted second | |
1343 | */ | |
1344 | ||
1345 | static struct goku_udc *the_controller; | |
1346 | ||
1347 | /* when a driver is successfully registered, it will receive | |
1348 | * control requests including set_configuration(), which enables | |
1349 | * non-control requests. then usb traffic follows until a | |
1350 | * disconnect is reported. then a host may connect again, or | |
1351 | * the driver might get unbound. | |
1352 | */ | |
0f91349b | 1353 | static int goku_start(struct usb_gadget_driver *driver, |
b0fca50f | 1354 | int (*bind)(struct usb_gadget *)) |
1da177e4 LT |
1355 | { |
1356 | struct goku_udc *dev = the_controller; | |
1357 | int retval; | |
1358 | ||
1359 | if (!driver | |
7177aed4 | 1360 | || driver->max_speed < USB_SPEED_FULL |
b0fca50f | 1361 | || !bind |
1da177e4 LT |
1362 | || !driver->disconnect |
1363 | || !driver->setup) | |
1364 | return -EINVAL; | |
1365 | if (!dev) | |
1366 | return -ENODEV; | |
1367 | if (dev->driver) | |
1368 | return -EBUSY; | |
1369 | ||
1370 | /* hook up the driver */ | |
1371 | driver->driver.bus = NULL; | |
1372 | dev->driver = driver; | |
1373 | dev->gadget.dev.driver = &driver->driver; | |
b0fca50f | 1374 | retval = bind(&dev->gadget); |
1da177e4 LT |
1375 | if (retval) { |
1376 | DBG(dev, "bind to driver %s --> error %d\n", | |
1377 | driver->driver.name, retval); | |
1378 | dev->driver = NULL; | |
1379 | dev->gadget.dev.driver = NULL; | |
1380 | return retval; | |
1381 | } | |
1382 | ||
1383 | /* then enable host detection and ep0; and we're ready | |
1384 | * for set_configuration as well as eventual disconnect. | |
1385 | */ | |
1386 | udc_enable(dev); | |
1387 | ||
1388 | DBG(dev, "registered gadget driver '%s'\n", driver->driver.name); | |
1389 | return 0; | |
1390 | } | |
1da177e4 LT |
1391 | |
1392 | static void | |
1393 | stop_activity(struct goku_udc *dev, struct usb_gadget_driver *driver) | |
1394 | { | |
1395 | unsigned i; | |
1396 | ||
441b62c1 | 1397 | DBG (dev, "%s\n", __func__); |
1da177e4 LT |
1398 | |
1399 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1400 | driver = NULL; | |
1401 | ||
1402 | /* disconnect gadget driver after quiesceing hw and the driver */ | |
1403 | udc_reset (dev); | |
1404 | for (i = 0; i < 4; i++) | |
1405 | nuke(&dev->ep [i], -ESHUTDOWN); | |
1406 | if (driver) { | |
1407 | spin_unlock(&dev->lock); | |
1408 | driver->disconnect(&dev->gadget); | |
1409 | spin_lock(&dev->lock); | |
1410 | } | |
1411 | ||
1412 | if (dev->driver) | |
1413 | udc_enable(dev); | |
1414 | } | |
1415 | ||
0f91349b | 1416 | static int goku_stop(struct usb_gadget_driver *driver) |
1da177e4 LT |
1417 | { |
1418 | struct goku_udc *dev = the_controller; | |
1419 | unsigned long flags; | |
1420 | ||
1421 | if (!dev) | |
1422 | return -ENODEV; | |
6bea476c | 1423 | if (!driver || driver != dev->driver || !driver->unbind) |
1da177e4 LT |
1424 | return -EINVAL; |
1425 | ||
1426 | spin_lock_irqsave(&dev->lock, flags); | |
1427 | dev->driver = NULL; | |
1428 | stop_activity(dev, driver); | |
1429 | spin_unlock_irqrestore(&dev->lock, flags); | |
1430 | ||
1431 | driver->unbind(&dev->gadget); | |
eb0be47d | 1432 | dev->gadget.dev.driver = NULL; |
1da177e4 LT |
1433 | |
1434 | DBG(dev, "unregistered driver '%s'\n", driver->driver.name); | |
1435 | return 0; | |
1436 | } | |
1da177e4 LT |
1437 | |
1438 | /*-------------------------------------------------------------------------*/ | |
1439 | ||
1440 | static void ep0_setup(struct goku_udc *dev) | |
1441 | { | |
1442 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1443 | struct usb_ctrlrequest ctrl; | |
1444 | int tmp; | |
1445 | ||
1446 | /* read SETUP packet and enter DATA stage */ | |
1447 | ctrl.bRequestType = readl(®s->bRequestType); | |
1448 | ctrl.bRequest = readl(®s->bRequest); | |
988199fe DB |
1449 | ctrl.wValue = cpu_to_le16((readl(®s->wValueH) << 8) |
1450 | | readl(®s->wValueL)); | |
1451 | ctrl.wIndex = cpu_to_le16((readl(®s->wIndexH) << 8) | |
1452 | | readl(®s->wIndexL)); | |
1453 | ctrl.wLength = cpu_to_le16((readl(®s->wLengthH) << 8) | |
1454 | | readl(®s->wLengthL)); | |
1da177e4 LT |
1455 | writel(0, ®s->SetupRecv); |
1456 | ||
1457 | nuke(&dev->ep[0], 0); | |
1458 | dev->ep[0].stopped = 0; | |
1459 | if (likely(ctrl.bRequestType & USB_DIR_IN)) { | |
1460 | dev->ep[0].is_in = 1; | |
1461 | dev->ep0state = EP0_IN; | |
1462 | /* detect early status stages */ | |
1463 | writel(ICONTROL_STATUSNAK, &dev->regs->IntControl); | |
1464 | } else { | |
1465 | dev->ep[0].is_in = 0; | |
1466 | dev->ep0state = EP0_OUT; | |
1467 | ||
1468 | /* NOTE: CLEAR_FEATURE is done in software so that we can | |
1469 | * synchronize transfer restarts after bulk IN stalls. data | |
1470 | * won't even enter the fifo until the halt is cleared. | |
1471 | */ | |
1472 | switch (ctrl.bRequest) { | |
1473 | case USB_REQ_CLEAR_FEATURE: | |
1474 | switch (ctrl.bRequestType) { | |
1475 | case USB_RECIP_ENDPOINT: | |
988199fe | 1476 | tmp = le16_to_cpu(ctrl.wIndex) & 0x0f; |
1da177e4 LT |
1477 | /* active endpoint */ |
1478 | if (tmp > 3 || (!dev->ep[tmp].desc && tmp != 0)) | |
1479 | goto stall; | |
551509d2 | 1480 | if (ctrl.wIndex & cpu_to_le16( |
988199fe | 1481 | USB_DIR_IN)) { |
1da177e4 LT |
1482 | if (!dev->ep[tmp].is_in) |
1483 | goto stall; | |
1484 | } else { | |
1485 | if (dev->ep[tmp].is_in) | |
1486 | goto stall; | |
1487 | } | |
551509d2 | 1488 | if (ctrl.wValue != cpu_to_le16( |
988199fe | 1489 | USB_ENDPOINT_HALT)) |
1da177e4 LT |
1490 | goto stall; |
1491 | if (tmp) | |
1492 | goku_clear_halt(&dev->ep[tmp]); | |
1493 | succeed: | |
1494 | /* start ep0out status stage */ | |
1495 | writel(~(1<<0), ®s->EOP); | |
1496 | dev->ep[0].stopped = 1; | |
1497 | dev->ep0state = EP0_STATUS; | |
1498 | return; | |
1499 | case USB_RECIP_DEVICE: | |
1500 | /* device remote wakeup: always clear */ | |
551509d2 | 1501 | if (ctrl.wValue != cpu_to_le16(1)) |
1da177e4 LT |
1502 | goto stall; |
1503 | VDBG(dev, "clear dev remote wakeup\n"); | |
1504 | goto succeed; | |
1505 | case USB_RECIP_INTERFACE: | |
1506 | goto stall; | |
1507 | default: /* pass to gadget driver */ | |
1508 | break; | |
1509 | } | |
1510 | break; | |
1511 | default: | |
1512 | break; | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | #ifdef USB_TRACE | |
1517 | VDBG(dev, "SETUP %02x.%02x v%04x i%04x l%04x\n", | |
1518 | ctrl.bRequestType, ctrl.bRequest, | |
988199fe DB |
1519 | le16_to_cpu(ctrl.wValue), le16_to_cpu(ctrl.wIndex), |
1520 | le16_to_cpu(ctrl.wLength)); | |
1da177e4 LT |
1521 | #endif |
1522 | ||
1523 | /* hw wants to know when we're configured (or not) */ | |
1524 | dev->req_config = (ctrl.bRequest == USB_REQ_SET_CONFIGURATION | |
1525 | && ctrl.bRequestType == USB_RECIP_DEVICE); | |
1526 | if (unlikely(dev->req_config)) | |
551509d2 | 1527 | dev->configured = (ctrl.wValue != cpu_to_le16(0)); |
1da177e4 LT |
1528 | |
1529 | /* delegate everything to the gadget driver. | |
1530 | * it may respond after this irq handler returns. | |
1531 | */ | |
1532 | spin_unlock (&dev->lock); | |
1533 | tmp = dev->driver->setup(&dev->gadget, &ctrl); | |
1534 | spin_lock (&dev->lock); | |
1535 | if (unlikely(tmp < 0)) { | |
1536 | stall: | |
1537 | #ifdef USB_TRACE | |
1538 | VDBG(dev, "req %02x.%02x protocol STALL; err %d\n", | |
1539 | ctrl.bRequestType, ctrl.bRequest, tmp); | |
1540 | #endif | |
1541 | command(regs, COMMAND_STALL, 0); | |
1542 | dev->ep[0].stopped = 1; | |
1543 | dev->ep0state = EP0_STALL; | |
1544 | } | |
1545 | ||
1546 | /* expect at least one data or status stage irq */ | |
1547 | } | |
1548 | ||
1549 | #define ACK(irqbit) { \ | |
1550 | stat &= ~irqbit; \ | |
1551 | writel(~irqbit, ®s->int_status); \ | |
1552 | handled = 1; \ | |
1553 | } | |
1554 | ||
7d12e780 | 1555 | static irqreturn_t goku_irq(int irq, void *_dev) |
1da177e4 LT |
1556 | { |
1557 | struct goku_udc *dev = _dev; | |
1558 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1559 | struct goku_ep *ep; | |
1560 | u32 stat, handled = 0; | |
1561 | unsigned i, rescans = 5; | |
1562 | ||
1563 | spin_lock(&dev->lock); | |
1564 | ||
1565 | rescan: | |
1566 | stat = readl(®s->int_status) & dev->int_enable; | |
1567 | if (!stat) | |
1568 | goto done; | |
1569 | dev->irqs++; | |
1570 | ||
1571 | /* device-wide irqs */ | |
1572 | if (unlikely(stat & INT_DEVWIDE)) { | |
1573 | if (stat & INT_SYSERROR) { | |
1574 | ERROR(dev, "system error\n"); | |
1575 | stop_activity(dev, dev->driver); | |
1576 | stat = 0; | |
1577 | handled = 1; | |
1578 | // FIXME have a neater way to prevent re-enumeration | |
1579 | dev->driver = NULL; | |
1580 | goto done; | |
1581 | } | |
1582 | if (stat & INT_PWRDETECT) { | |
1583 | writel(~stat, ®s->int_status); | |
1584 | if (readl(&dev->regs->power_detect) & PW_DETECT) { | |
1585 | VDBG(dev, "connect\n"); | |
1586 | ep0_start(dev); | |
1587 | } else { | |
1588 | DBG(dev, "disconnect\n"); | |
1589 | if (dev->gadget.speed == USB_SPEED_FULL) | |
1590 | stop_activity(dev, dev->driver); | |
1591 | dev->ep0state = EP0_DISCONNECT; | |
1592 | dev->int_enable = INT_DEVWIDE; | |
1593 | writel(dev->int_enable, &dev->regs->int_enable); | |
1594 | } | |
1595 | stat = 0; | |
1596 | handled = 1; | |
1597 | goto done; | |
1598 | } | |
1599 | if (stat & INT_SUSPEND) { | |
1600 | ACK(INT_SUSPEND); | |
1601 | if (readl(®s->ep_status[0]) & EPxSTATUS_SUSPEND) { | |
1602 | switch (dev->ep0state) { | |
1603 | case EP0_DISCONNECT: | |
1604 | case EP0_SUSPEND: | |
1605 | goto pm_next; | |
1606 | default: | |
1607 | break; | |
1608 | } | |
1609 | DBG(dev, "USB suspend\n"); | |
1610 | dev->ep0state = EP0_SUSPEND; | |
1611 | if (dev->gadget.speed != USB_SPEED_UNKNOWN | |
1612 | && dev->driver | |
1613 | && dev->driver->suspend) { | |
1614 | spin_unlock(&dev->lock); | |
1615 | dev->driver->suspend(&dev->gadget); | |
1616 | spin_lock(&dev->lock); | |
1617 | } | |
1618 | } else { | |
1619 | if (dev->ep0state != EP0_SUSPEND) { | |
1620 | DBG(dev, "bogus USB resume %d\n", | |
1621 | dev->ep0state); | |
1622 | goto pm_next; | |
1623 | } | |
1624 | DBG(dev, "USB resume\n"); | |
1625 | dev->ep0state = EP0_IDLE; | |
1626 | if (dev->gadget.speed != USB_SPEED_UNKNOWN | |
1627 | && dev->driver | |
1628 | && dev->driver->resume) { | |
1629 | spin_unlock(&dev->lock); | |
1630 | dev->driver->resume(&dev->gadget); | |
1631 | spin_lock(&dev->lock); | |
1632 | } | |
1633 | } | |
1634 | } | |
1635 | pm_next: | |
1636 | if (stat & INT_USBRESET) { /* hub reset done */ | |
1637 | ACK(INT_USBRESET); | |
1638 | INFO(dev, "USB reset done, gadget %s\n", | |
1639 | dev->driver->driver.name); | |
1640 | } | |
1641 | // and INT_ERR on some endpoint's crc/bitstuff/... problem | |
1642 | } | |
1643 | ||
1644 | /* progress ep0 setup, data, or status stages. | |
1645 | * no transition {EP0_STATUS, EP0_STALL} --> EP0_IDLE; saves irqs | |
1646 | */ | |
1647 | if (stat & INT_SETUP) { | |
1648 | ACK(INT_SETUP); | |
1649 | dev->ep[0].irqs++; | |
1650 | ep0_setup(dev); | |
1651 | } | |
1652 | if (stat & INT_STATUSNAK) { | |
1653 | ACK(INT_STATUSNAK|INT_ENDPOINT0); | |
1654 | if (dev->ep0state == EP0_IN) { | |
1655 | ep = &dev->ep[0]; | |
1656 | ep->irqs++; | |
1657 | nuke(ep, 0); | |
1658 | writel(~(1<<0), ®s->EOP); | |
1659 | dev->ep0state = EP0_STATUS; | |
1660 | } | |
1661 | } | |
1662 | if (stat & INT_ENDPOINT0) { | |
1663 | ACK(INT_ENDPOINT0); | |
1664 | ep = &dev->ep[0]; | |
1665 | ep->irqs++; | |
1666 | pio_advance(ep); | |
1667 | } | |
1668 | ||
1669 | /* dma completion */ | |
1670 | if (stat & INT_MSTRDEND) { /* IN */ | |
1671 | ACK(INT_MSTRDEND); | |
1672 | ep = &dev->ep[UDC_MSTRD_ENDPOINT]; | |
1673 | ep->irqs++; | |
1674 | dma_advance(dev, ep); | |
1675 | } | |
1676 | if (stat & INT_MSTWREND) { /* OUT */ | |
1677 | ACK(INT_MSTWREND); | |
1678 | ep = &dev->ep[UDC_MSTWR_ENDPOINT]; | |
1679 | ep->irqs++; | |
1680 | dma_advance(dev, ep); | |
1681 | } | |
1682 | if (stat & INT_MSTWRTMOUT) { /* OUT */ | |
1683 | ACK(INT_MSTWRTMOUT); | |
1684 | ep = &dev->ep[UDC_MSTWR_ENDPOINT]; | |
1685 | ep->irqs++; | |
1686 | ERROR(dev, "%s write timeout ?\n", ep->ep.name); | |
1687 | // reset dma? then dma_advance() | |
1688 | } | |
1689 | ||
1690 | /* pio */ | |
1691 | for (i = 1; i < 4; i++) { | |
1692 | u32 tmp = INT_EPxDATASET(i); | |
1693 | ||
1694 | if (!(stat & tmp)) | |
1695 | continue; | |
1696 | ep = &dev->ep[i]; | |
1697 | pio_advance(ep); | |
1698 | if (list_empty (&ep->queue)) | |
1699 | pio_irq_disable(dev, regs, i); | |
1700 | stat &= ~tmp; | |
1701 | handled = 1; | |
1702 | ep->irqs++; | |
1703 | } | |
1704 | ||
1705 | if (rescans--) | |
1706 | goto rescan; | |
1707 | ||
1708 | done: | |
1709 | (void)readl(®s->int_enable); | |
1710 | spin_unlock(&dev->lock); | |
1711 | if (stat) | |
1712 | DBG(dev, "unhandled irq status: %05x (%05x, %05x)\n", stat, | |
1713 | readl(®s->int_status), dev->int_enable); | |
1714 | return IRQ_RETVAL(handled); | |
1715 | } | |
1716 | ||
1717 | #undef ACK | |
1718 | ||
1719 | /*-------------------------------------------------------------------------*/ | |
1720 | ||
1721 | static void gadget_release(struct device *_dev) | |
1722 | { | |
1723 | struct goku_udc *dev = dev_get_drvdata(_dev); | |
1724 | ||
1725 | kfree(dev); | |
1726 | } | |
1727 | ||
1728 | /* tear down the binding between this driver and the pci device */ | |
1729 | ||
1730 | static void goku_remove(struct pci_dev *pdev) | |
1731 | { | |
1732 | struct goku_udc *dev = pci_get_drvdata(pdev); | |
1733 | ||
441b62c1 | 1734 | DBG(dev, "%s\n", __func__); |
6bea476c | 1735 | |
0f91349b SAS |
1736 | usb_del_gadget_udc(&dev->gadget); |
1737 | ||
6bea476c | 1738 | BUG_ON(dev->driver); |
1da177e4 LT |
1739 | |
1740 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
1741 | remove_proc_entry(proc_node_name, NULL); | |
1742 | #endif | |
1743 | if (dev->regs) | |
1744 | udc_reset(dev); | |
1745 | if (dev->got_irq) | |
1746 | free_irq(pdev->irq, dev); | |
1747 | if (dev->regs) | |
1748 | iounmap(dev->regs); | |
1749 | if (dev->got_region) | |
1750 | release_mem_region(pci_resource_start (pdev, 0), | |
1751 | pci_resource_len (pdev, 0)); | |
1752 | if (dev->enabled) | |
1753 | pci_disable_device(pdev); | |
319feaab DC |
1754 | if (dev->registered) |
1755 | device_unregister(&dev->gadget.dev); | |
1da177e4 LT |
1756 | |
1757 | pci_set_drvdata(pdev, NULL); | |
1758 | dev->regs = NULL; | |
1759 | the_controller = NULL; | |
1760 | ||
1761 | INFO(dev, "unbind\n"); | |
1762 | } | |
1763 | ||
1764 | /* wrap this driver around the specified pci device, but | |
1765 | * don't respond over USB until a gadget driver binds to us. | |
1766 | */ | |
1767 | ||
1768 | static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id) | |
1769 | { | |
1770 | struct goku_udc *dev = NULL; | |
1771 | unsigned long resource, len; | |
1772 | void __iomem *base = NULL; | |
1773 | int retval; | |
1da177e4 LT |
1774 | |
1775 | /* if you want to support more than one controller in a system, | |
1776 | * usb_gadget_driver_{register,unregister}() must change. | |
1777 | */ | |
1778 | if (the_controller) { | |
872f8b42 | 1779 | pr_warning("ignoring %s\n", pci_name(pdev)); |
1da177e4 LT |
1780 | return -EBUSY; |
1781 | } | |
1782 | if (!pdev->irq) { | |
1783 | printk(KERN_ERR "Check PCI %s IRQ setup!\n", pci_name(pdev)); | |
1784 | retval = -ENODEV; | |
319feaab | 1785 | goto err; |
1da177e4 LT |
1786 | } |
1787 | ||
1788 | /* alloc, and start init */ | |
dd00cc48 | 1789 | dev = kzalloc (sizeof *dev, GFP_KERNEL); |
1da177e4 LT |
1790 | if (dev == NULL){ |
1791 | pr_debug("enomem %s\n", pci_name(pdev)); | |
1792 | retval = -ENOMEM; | |
319feaab | 1793 | goto err; |
1da177e4 LT |
1794 | } |
1795 | ||
1da177e4 LT |
1796 | spin_lock_init(&dev->lock); |
1797 | dev->pdev = pdev; | |
1798 | dev->gadget.ops = &goku_ops; | |
d327ab5b | 1799 | dev->gadget.max_speed = USB_SPEED_FULL; |
1da177e4 LT |
1800 | |
1801 | /* the "gadget" abstracts/virtualizes the controller */ | |
0031a06e | 1802 | dev_set_name(&dev->gadget.dev, "gadget"); |
1da177e4 LT |
1803 | dev->gadget.dev.parent = &pdev->dev; |
1804 | dev->gadget.dev.dma_mask = pdev->dev.dma_mask; | |
1805 | dev->gadget.dev.release = gadget_release; | |
1806 | dev->gadget.name = driver_name; | |
1807 | ||
1808 | /* now all the pci goodies ... */ | |
1809 | retval = pci_enable_device(pdev); | |
1810 | if (retval < 0) { | |
1811 | DBG(dev, "can't enable, %d\n", retval); | |
319feaab | 1812 | goto err; |
1da177e4 LT |
1813 | } |
1814 | dev->enabled = 1; | |
1815 | ||
1816 | resource = pci_resource_start(pdev, 0); | |
1817 | len = pci_resource_len(pdev, 0); | |
1818 | if (!request_mem_region(resource, len, driver_name)) { | |
1819 | DBG(dev, "controller already in use\n"); | |
1820 | retval = -EBUSY; | |
319feaab | 1821 | goto err; |
1da177e4 LT |
1822 | } |
1823 | dev->got_region = 1; | |
1824 | ||
1825 | base = ioremap_nocache(resource, len); | |
1826 | if (base == NULL) { | |
1827 | DBG(dev, "can't map memory\n"); | |
1828 | retval = -EFAULT; | |
319feaab | 1829 | goto err; |
1da177e4 LT |
1830 | } |
1831 | dev->regs = (struct goku_udc_regs __iomem *) base; | |
1832 | ||
1833 | pci_set_drvdata(pdev, dev); | |
1834 | INFO(dev, "%s\n", driver_desc); | |
1835 | INFO(dev, "version: " DRIVER_VERSION " %s\n", dmastr()); | |
c6387a48 | 1836 | INFO(dev, "irq %d, pci mem %p\n", pdev->irq, base); |
1da177e4 LT |
1837 | |
1838 | /* init to known state, then setup irqs */ | |
1839 | udc_reset(dev); | |
1840 | udc_reinit (dev); | |
d54b5caa | 1841 | if (request_irq(pdev->irq, goku_irq, IRQF_SHARED/*|IRQF_SAMPLE_RANDOM*/, |
1da177e4 | 1842 | driver_name, dev) != 0) { |
c6387a48 | 1843 | DBG(dev, "request interrupt %d failed\n", pdev->irq); |
1da177e4 | 1844 | retval = -EBUSY; |
319feaab | 1845 | goto err; |
1da177e4 LT |
1846 | } |
1847 | dev->got_irq = 1; | |
1848 | if (use_dma) | |
1849 | pci_set_master(pdev); | |
1850 | ||
1851 | ||
1852 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
1853 | create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev); | |
1854 | #endif | |
1855 | ||
1da177e4 | 1856 | the_controller = dev; |
2d70c99b | 1857 | retval = device_register(&dev->gadget.dev); |
319feaab DC |
1858 | if (retval) { |
1859 | put_device(&dev->gadget.dev); | |
1860 | goto err; | |
1861 | } | |
1862 | dev->registered = 1; | |
0f91349b SAS |
1863 | retval = usb_add_gadget_udc(&pdev->dev, &dev->gadget); |
1864 | if (retval) | |
1865 | goto err; | |
1866 | ||
319feaab | 1867 | return 0; |
1da177e4 | 1868 | |
319feaab | 1869 | err: |
1da177e4 LT |
1870 | if (dev) |
1871 | goku_remove (pdev); | |
1872 | return retval; | |
1873 | } | |
1874 | ||
1875 | ||
1876 | /*-------------------------------------------------------------------------*/ | |
1877 | ||
1ba2557f | 1878 | static const struct pci_device_id pci_ids[] = { { |
2d70c99b DB |
1879 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), |
1880 | .class_mask = ~0, | |
1da177e4 LT |
1881 | .vendor = 0x102f, /* Toshiba */ |
1882 | .device = 0x0107, /* this UDC */ | |
1883 | .subvendor = PCI_ANY_ID, | |
1884 | .subdevice = PCI_ANY_ID, | |
1885 | ||
1886 | }, { /* end: all zeroes */ } | |
1887 | }; | |
1888 | MODULE_DEVICE_TABLE (pci, pci_ids); | |
1889 | ||
1890 | static struct pci_driver goku_pci_driver = { | |
1891 | .name = (char *) driver_name, | |
1892 | .id_table = pci_ids, | |
1893 | ||
1894 | .probe = goku_probe, | |
1895 | .remove = goku_remove, | |
1896 | ||
1897 | /* FIXME add power management support */ | |
1898 | }; | |
1899 | ||
1900 | static int __init init (void) | |
1901 | { | |
1902 | return pci_register_driver (&goku_pci_driver); | |
1903 | } | |
1904 | module_init (init); | |
1905 | ||
1906 | static void __exit cleanup (void) | |
1907 | { | |
1908 | pci_unregister_driver (&goku_pci_driver); | |
1909 | } | |
1910 | module_exit (cleanup); |