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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * Toshiba TC86C001 ("Goku-S") USB Device Controller driver | |
4 | * | |
5 | * Copyright (C) 2000-2002 Lineo | |
6 | * by Stuart Lynne, Tom Rushworth, and Bruce Balden | |
7 | * Copyright (C) 2002 Toshiba Corporation | |
8 | * Copyright (C) 2003 MontaVista Software (source@mvista.com) | |
1da177e4 LT |
9 | */ |
10 | ||
11 | /* | |
12 | * This device has ep0 and three semi-configurable bulk/interrupt endpoints. | |
13 | * | |
14 | * - Endpoint numbering is fixed: ep{1,2,3}-bulk | |
15 | * - Gadget drivers can choose ep maxpacket (8/16/32/64) | |
16 | * - Gadget drivers can choose direction (IN, OUT) | |
17 | * - DMA works with ep1 (OUT transfers) and ep2 (IN transfers). | |
18 | */ | |
19 | ||
1da177e4 LT |
20 | // #define VERBOSE /* extra debug messages (success too) */ |
21 | // #define USB_TRACE /* packet-level success messages */ | |
22 | ||
1da177e4 LT |
23 | #include <linux/kernel.h> |
24 | #include <linux/module.h> | |
25 | #include <linux/pci.h> | |
26 | #include <linux/delay.h> | |
27 | #include <linux/ioport.h> | |
1da177e4 | 28 | #include <linux/slab.h> |
1da177e4 | 29 | #include <linux/errno.h> |
1da177e4 LT |
30 | #include <linux/timer.h> |
31 | #include <linux/list.h> | |
32 | #include <linux/interrupt.h> | |
33 | #include <linux/proc_fs.h> | |
96c7a22e | 34 | #include <linux/seq_file.h> |
1da177e4 | 35 | #include <linux/device.h> |
5f848137 | 36 | #include <linux/usb/ch9.h> |
9454a57a | 37 | #include <linux/usb/gadget.h> |
268bb0ce | 38 | #include <linux/prefetch.h> |
1da177e4 LT |
39 | |
40 | #include <asm/byteorder.h> | |
41 | #include <asm/io.h> | |
42 | #include <asm/irq.h> | |
1da177e4 LT |
43 | #include <asm/unaligned.h> |
44 | ||
45 | ||
46 | #include "goku_udc.h" | |
47 | ||
48 | #define DRIVER_DESC "TC86C001 USB Device Controller" | |
49 | #define DRIVER_VERSION "30-Oct 2003" | |
50 | ||
1da177e4 LT |
51 | static const char driver_name [] = "goku_udc"; |
52 | static const char driver_desc [] = DRIVER_DESC; | |
53 | ||
54 | MODULE_AUTHOR("source@mvista.com"); | |
55 | MODULE_DESCRIPTION(DRIVER_DESC); | |
56 | MODULE_LICENSE("GPL"); | |
57 | ||
58 | ||
59 | /* | |
60 | * IN dma behaves ok under testing, though the IN-dma abort paths don't | |
61 | * seem to behave quite as expected. Used by default. | |
62 | * | |
63 | * OUT dma documents design problems handling the common "short packet" | |
988199fe | 64 | * transfer termination policy; it couldn't be enabled by default, even |
1da177e4 LT |
65 | * if the OUT-dma abort problems had a resolution. |
66 | */ | |
67 | static unsigned use_dma = 1; | |
68 | ||
69 | #if 0 | |
70 | //#include <linux/moduleparam.h> | |
71 | /* "modprobe goku_udc use_dma=1" etc | |
72 | * 0 to disable dma | |
73 | * 1 to use IN dma only (normal operation) | |
74 | * 2 to use IN and OUT dma | |
75 | */ | |
76 | module_param(use_dma, uint, S_IRUGO); | |
77 | #endif | |
78 | ||
79 | /*-------------------------------------------------------------------------*/ | |
80 | ||
81 | static void nuke(struct goku_ep *, int status); | |
82 | ||
83 | static inline void | |
84 | command(struct goku_udc_regs __iomem *regs, int command, unsigned epnum) | |
85 | { | |
86 | writel(COMMAND_EP(epnum) | command, ®s->Command); | |
87 | udelay(300); | |
88 | } | |
89 | ||
90 | static int | |
91 | goku_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) | |
92 | { | |
93 | struct goku_udc *dev; | |
94 | struct goku_ep *ep; | |
95 | u32 mode; | |
96 | u16 max; | |
97 | unsigned long flags; | |
98 | ||
99 | ep = container_of(_ep, struct goku_ep, ep); | |
aedaa44d | 100 | if (!_ep || !desc |
1da177e4 LT |
101 | || desc->bDescriptorType != USB_DT_ENDPOINT) |
102 | return -EINVAL; | |
103 | dev = ep->dev; | |
104 | if (ep == &dev->ep[0]) | |
105 | return -EINVAL; | |
106 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
107 | return -ESHUTDOWN; | |
9ab15651 | 108 | if (ep->num != usb_endpoint_num(desc)) |
1da177e4 LT |
109 | return -EINVAL; |
110 | ||
9ab15651 | 111 | switch (usb_endpoint_type(desc)) { |
1da177e4 LT |
112 | case USB_ENDPOINT_XFER_BULK: |
113 | case USB_ENDPOINT_XFER_INT: | |
114 | break; | |
115 | default: | |
116 | return -EINVAL; | |
117 | } | |
118 | ||
119 | if ((readl(ep->reg_status) & EPxSTATUS_EP_MASK) | |
120 | != EPxSTATUS_EP_INVALID) | |
121 | return -EBUSY; | |
122 | ||
123 | /* enabling the no-toggle interrupt mode would need an api hook */ | |
124 | mode = 0; | |
a5abdeaf | 125 | max = get_unaligned_le16(&desc->wMaxPacketSize); |
1da177e4 | 126 | switch (max) { |
457b16d4 | 127 | case 64: |
a74005ab GS |
128 | mode++; |
129 | fallthrough; | |
457b16d4 | 130 | case 32: |
a74005ab GS |
131 | mode++; |
132 | fallthrough; | |
457b16d4 | 133 | case 16: |
a74005ab GS |
134 | mode++; |
135 | fallthrough; | |
457b16d4 GS |
136 | case 8: |
137 | mode <<= 3; | |
138 | break; | |
1da177e4 LT |
139 | default: |
140 | return -EINVAL; | |
141 | } | |
142 | mode |= 2 << 1; /* bulk, or intr-with-toggle */ | |
143 | ||
144 | /* ep1/ep2 dma direction is chosen early; it works in the other | |
145 | * direction, with pio. be cautious with out-dma. | |
146 | */ | |
9ab15651 | 147 | ep->is_in = usb_endpoint_dir_in(desc); |
1da177e4 LT |
148 | if (ep->is_in) { |
149 | mode |= 1; | |
150 | ep->dma = (use_dma != 0) && (ep->num == UDC_MSTRD_ENDPOINT); | |
151 | } else { | |
152 | ep->dma = (use_dma == 2) && (ep->num == UDC_MSTWR_ENDPOINT); | |
153 | if (ep->dma) | |
154 | DBG(dev, "%s out-dma hides short packets\n", | |
155 | ep->ep.name); | |
156 | } | |
157 | ||
158 | spin_lock_irqsave(&ep->dev->lock, flags); | |
159 | ||
160 | /* ep1 and ep2 can do double buffering and/or dma */ | |
161 | if (ep->num < 3) { | |
162 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
163 | u32 tmp; | |
164 | ||
165 | /* double buffer except (for now) with pio in */ | |
166 | tmp = ((ep->dma || !ep->is_in) | |
167 | ? 0x10 /* double buffered */ | |
168 | : 0x11 /* single buffer */ | |
169 | ) << ep->num; | |
170 | tmp |= readl(®s->EPxSingle); | |
171 | writel(tmp, ®s->EPxSingle); | |
172 | ||
173 | tmp = (ep->dma ? 0x10/*dma*/ : 0x11/*pio*/) << ep->num; | |
174 | tmp |= readl(®s->EPxBCS); | |
175 | writel(tmp, ®s->EPxBCS); | |
176 | } | |
177 | writel(mode, ep->reg_mode); | |
178 | command(ep->dev->regs, COMMAND_RESET, ep->num); | |
179 | ep->ep.maxpacket = max; | |
180 | ep->stopped = 0; | |
db79d981 | 181 | ep->ep.desc = desc; |
1da177e4 LT |
182 | spin_unlock_irqrestore(&ep->dev->lock, flags); |
183 | ||
184 | DBG(dev, "enable %s %s %s maxpacket %u\n", ep->ep.name, | |
185 | ep->is_in ? "IN" : "OUT", | |
186 | ep->dma ? "dma" : "pio", | |
187 | max); | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | static void ep_reset(struct goku_udc_regs __iomem *regs, struct goku_ep *ep) | |
193 | { | |
194 | struct goku_udc *dev = ep->dev; | |
195 | ||
196 | if (regs) { | |
197 | command(regs, COMMAND_INVALID, ep->num); | |
198 | if (ep->num) { | |
199 | if (ep->num == UDC_MSTWR_ENDPOINT) | |
200 | dev->int_enable &= ~(INT_MSTWREND | |
201 | |INT_MSTWRTMOUT); | |
202 | else if (ep->num == UDC_MSTRD_ENDPOINT) | |
203 | dev->int_enable &= ~INT_MSTRDEND; | |
204 | dev->int_enable &= ~INT_EPxDATASET (ep->num); | |
205 | } else | |
206 | dev->int_enable &= ~INT_EP0; | |
207 | writel(dev->int_enable, ®s->int_enable); | |
208 | readl(®s->int_enable); | |
209 | if (ep->num < 3) { | |
210 | struct goku_udc_regs __iomem *r = ep->dev->regs; | |
211 | u32 tmp; | |
212 | ||
213 | tmp = readl(&r->EPxSingle); | |
214 | tmp &= ~(0x11 << ep->num); | |
215 | writel(tmp, &r->EPxSingle); | |
216 | ||
217 | tmp = readl(&r->EPxBCS); | |
218 | tmp &= ~(0x11 << ep->num); | |
219 | writel(tmp, &r->EPxBCS); | |
220 | } | |
221 | /* reset dma in case we're still using it */ | |
222 | if (ep->dma) { | |
223 | u32 master; | |
224 | ||
225 | master = readl(®s->dma_master) & MST_RW_BITS; | |
226 | if (ep->num == UDC_MSTWR_ENDPOINT) { | |
227 | master &= ~MST_W_BITS; | |
228 | master |= MST_WR_RESET; | |
229 | } else { | |
230 | master &= ~MST_R_BITS; | |
231 | master |= MST_RD_RESET; | |
232 | } | |
233 | writel(master, ®s->dma_master); | |
234 | } | |
235 | } | |
236 | ||
e117e742 | 237 | usb_ep_set_maxpacket_limit(&ep->ep, MAX_FIFO_SIZE); |
f9c56cdd | 238 | ep->ep.desc = NULL; |
1da177e4 LT |
239 | ep->stopped = 1; |
240 | ep->irqs = 0; | |
241 | ep->dma = 0; | |
242 | } | |
243 | ||
244 | static int goku_ep_disable(struct usb_ep *_ep) | |
245 | { | |
246 | struct goku_ep *ep; | |
247 | struct goku_udc *dev; | |
248 | unsigned long flags; | |
249 | ||
250 | ep = container_of(_ep, struct goku_ep, ep); | |
db79d981 | 251 | if (!_ep || !ep->ep.desc) |
1da177e4 LT |
252 | return -ENODEV; |
253 | dev = ep->dev; | |
254 | if (dev->ep0state == EP0_SUSPEND) | |
255 | return -EBUSY; | |
256 | ||
257 | VDBG(dev, "disable %s\n", _ep->name); | |
258 | ||
259 | spin_lock_irqsave(&dev->lock, flags); | |
260 | nuke(ep, -ESHUTDOWN); | |
261 | ep_reset(dev->regs, ep); | |
262 | spin_unlock_irqrestore(&dev->lock, flags); | |
263 | ||
264 | return 0; | |
265 | } | |
266 | ||
267 | /*-------------------------------------------------------------------------*/ | |
268 | ||
269 | static struct usb_request * | |
55016f10 | 270 | goku_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) |
1da177e4 LT |
271 | { |
272 | struct goku_request *req; | |
273 | ||
274 | if (!_ep) | |
275 | return NULL; | |
7039f422 | 276 | req = kzalloc(sizeof *req, gfp_flags); |
1da177e4 LT |
277 | if (!req) |
278 | return NULL; | |
279 | ||
1da177e4 LT |
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; | |
6440093f FB |
313 | |
314 | if (ep->dma) | |
315 | usb_gadget_unmap_request(&dev->gadget, &req->req, ep->is_in); | |
1da177e4 LT |
316 | |
317 | #ifndef USB_TRACE | |
318 | if (status && status != -ESHUTDOWN) | |
319 | #endif | |
320 | VDBG(dev, "complete %s req %p stat %d len %u/%u\n", | |
321 | ep->ep.name, &req->req, status, | |
322 | req->req.actual, req->req.length); | |
323 | ||
324 | /* don't modify queue heads during completion callback */ | |
325 | ep->stopped = 1; | |
326 | spin_unlock(&dev->lock); | |
304f7e5e | 327 | usb_gadget_giveback_request(&ep->ep, &req->req); |
1da177e4 LT |
328 | spin_lock(&dev->lock); |
329 | ep->stopped = stopped; | |
330 | } | |
331 | ||
332 | /*-------------------------------------------------------------------------*/ | |
333 | ||
334 | static inline int | |
335 | write_packet(u32 __iomem *fifo, u8 *buf, struct goku_request *req, unsigned max) | |
336 | { | |
337 | unsigned length, count; | |
338 | ||
339 | length = min(req->req.length - req->req.actual, max); | |
340 | req->req.actual += length; | |
341 | ||
342 | count = length; | |
343 | while (likely(count--)) | |
344 | writel(*buf++, fifo); | |
345 | return length; | |
346 | } | |
347 | ||
348 | // return: 0 = still running, 1 = completed, negative = errno | |
349 | static int write_fifo(struct goku_ep *ep, struct goku_request *req) | |
350 | { | |
351 | struct goku_udc *dev = ep->dev; | |
352 | u32 tmp; | |
353 | u8 *buf; | |
354 | unsigned count; | |
355 | int is_last; | |
356 | ||
357 | tmp = readl(&dev->regs->DataSet); | |
358 | buf = req->req.buf + req->req.actual; | |
359 | prefetch(buf); | |
360 | ||
361 | dev = ep->dev; | |
362 | if (unlikely(ep->num == 0 && dev->ep0state != EP0_IN)) | |
363 | return -EL2HLT; | |
364 | ||
365 | /* NOTE: just single-buffered PIO-IN for now. */ | |
366 | if (unlikely((tmp & DATASET_A(ep->num)) != 0)) | |
367 | return 0; | |
368 | ||
369 | /* clear our "packet available" irq */ | |
370 | if (ep->num != 0) | |
371 | writel(~INT_EPxDATASET(ep->num), &dev->regs->int_status); | |
372 | ||
373 | count = write_packet(ep->reg_fifo, buf, req, ep->ep.maxpacket); | |
374 | ||
375 | /* last packet often short (sometimes a zlp, especially on ep0) */ | |
376 | if (unlikely(count != ep->ep.maxpacket)) { | |
377 | writel(~(1<<ep->num), &dev->regs->EOP); | |
378 | if (ep->num == 0) { | |
379 | dev->ep[0].stopped = 1; | |
380 | dev->ep0state = EP0_STATUS; | |
381 | } | |
382 | is_last = 1; | |
383 | } else { | |
384 | if (likely(req->req.length != req->req.actual) | |
385 | || req->req.zero) | |
386 | is_last = 0; | |
387 | else | |
388 | is_last = 1; | |
389 | } | |
390 | #if 0 /* printk seemed to trash is_last...*/ | |
391 | //#ifdef USB_TRACE | |
392 | VDBG(dev, "wrote %s %u bytes%s IN %u left %p\n", | |
393 | ep->ep.name, count, is_last ? "/last" : "", | |
394 | req->req.length - req->req.actual, req); | |
395 | #endif | |
396 | ||
397 | /* requests complete when all IN data is in the FIFO, | |
398 | * or sometimes later, if a zlp was needed. | |
399 | */ | |
400 | if (is_last) { | |
401 | done(ep, req, 0); | |
402 | return 1; | |
403 | } | |
404 | ||
405 | return 0; | |
406 | } | |
407 | ||
408 | static int read_fifo(struct goku_ep *ep, struct goku_request *req) | |
409 | { | |
410 | struct goku_udc_regs __iomem *regs; | |
411 | u32 size, set; | |
412 | u8 *buf; | |
413 | unsigned bufferspace, is_short, dbuff; | |
414 | ||
415 | regs = ep->dev->regs; | |
416 | top: | |
417 | buf = req->req.buf + req->req.actual; | |
418 | prefetchw(buf); | |
419 | ||
420 | if (unlikely(ep->num == 0 && ep->dev->ep0state != EP0_OUT)) | |
421 | return -EL2HLT; | |
422 | ||
423 | dbuff = (ep->num == 1 || ep->num == 2); | |
424 | do { | |
425 | /* ack dataset irq matching the status we'll handle */ | |
426 | if (ep->num != 0) | |
427 | writel(~INT_EPxDATASET(ep->num), ®s->int_status); | |
428 | ||
429 | set = readl(®s->DataSet) & DATASET_AB(ep->num); | |
430 | size = readl(®s->EPxSizeLA[ep->num]); | |
431 | bufferspace = req->req.length - req->req.actual; | |
432 | ||
433 | /* usually do nothing without an OUT packet */ | |
434 | if (likely(ep->num != 0 || bufferspace != 0)) { | |
435 | if (unlikely(set == 0)) | |
436 | break; | |
437 | /* use ep1/ep2 double-buffering for OUT */ | |
438 | if (!(size & PACKET_ACTIVE)) | |
439 | size = readl(®s->EPxSizeLB[ep->num]); | |
2d70c99b | 440 | if (!(size & PACKET_ACTIVE)) /* "can't happen" */ |
1da177e4 LT |
441 | break; |
442 | size &= DATASIZE; /* EPxSizeH == 0 */ | |
443 | ||
444 | /* ep0out no-out-data case for set_config, etc */ | |
445 | } else | |
446 | size = 0; | |
447 | ||
448 | /* read all bytes from this packet */ | |
449 | req->req.actual += size; | |
450 | is_short = (size < ep->ep.maxpacket); | |
451 | #ifdef USB_TRACE | |
452 | VDBG(ep->dev, "read %s %u bytes%s OUT req %p %u/%u\n", | |
453 | ep->ep.name, size, is_short ? "/S" : "", | |
454 | req, req->req.actual, req->req.length); | |
455 | #endif | |
456 | while (likely(size-- != 0)) { | |
457 | u8 byte = (u8) readl(ep->reg_fifo); | |
458 | ||
459 | if (unlikely(bufferspace == 0)) { | |
460 | /* this happens when the driver's buffer | |
461 | * is smaller than what the host sent. | |
462 | * discard the extra data in this packet. | |
463 | */ | |
464 | if (req->req.status != -EOVERFLOW) | |
465 | DBG(ep->dev, "%s overflow %u\n", | |
466 | ep->ep.name, size); | |
467 | req->req.status = -EOVERFLOW; | |
468 | } else { | |
469 | *buf++ = byte; | |
470 | bufferspace--; | |
471 | } | |
472 | } | |
473 | ||
474 | /* completion */ | |
475 | if (unlikely(is_short || req->req.actual == req->req.length)) { | |
476 | if (unlikely(ep->num == 0)) { | |
477 | /* non-control endpoints now usable? */ | |
478 | if (ep->dev->req_config) | |
479 | writel(ep->dev->configured | |
480 | ? USBSTATE_CONFIGURED | |
481 | : 0, | |
482 | ®s->UsbState); | |
483 | /* ep0out status stage */ | |
484 | writel(~(1<<0), ®s->EOP); | |
485 | ep->stopped = 1; | |
486 | ep->dev->ep0state = EP0_STATUS; | |
487 | } | |
488 | done(ep, req, 0); | |
489 | ||
490 | /* empty the second buffer asap */ | |
491 | if (dbuff && !list_empty(&ep->queue)) { | |
492 | req = list_entry(ep->queue.next, | |
493 | struct goku_request, queue); | |
494 | goto top; | |
495 | } | |
496 | return 1; | |
497 | } | |
498 | } while (dbuff); | |
499 | return 0; | |
500 | } | |
501 | ||
502 | static inline void | |
503 | pio_irq_enable(struct goku_udc *dev, | |
504 | struct goku_udc_regs __iomem *regs, int epnum) | |
505 | { | |
506 | dev->int_enable |= INT_EPxDATASET (epnum); | |
507 | writel(dev->int_enable, ®s->int_enable); | |
508 | /* write may still be posted */ | |
509 | } | |
510 | ||
511 | static inline void | |
512 | pio_irq_disable(struct goku_udc *dev, | |
513 | struct goku_udc_regs __iomem *regs, int epnum) | |
514 | { | |
515 | dev->int_enable &= ~INT_EPxDATASET (epnum); | |
516 | writel(dev->int_enable, ®s->int_enable); | |
517 | /* write may still be posted */ | |
518 | } | |
519 | ||
520 | static inline void | |
521 | pio_advance(struct goku_ep *ep) | |
522 | { | |
523 | struct goku_request *req; | |
524 | ||
525 | if (unlikely(list_empty (&ep->queue))) | |
526 | return; | |
527 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
528 | (ep->is_in ? write_fifo : read_fifo)(ep, req); | |
529 | } | |
530 | ||
531 | ||
532 | /*-------------------------------------------------------------------------*/ | |
533 | ||
534 | // return: 0 = q running, 1 = q stopped, negative = errno | |
535 | static int start_dma(struct goku_ep *ep, struct goku_request *req) | |
536 | { | |
537 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
538 | u32 master; | |
539 | u32 start = req->req.dma; | |
540 | u32 end = start + req->req.length - 1; | |
541 | ||
542 | master = readl(®s->dma_master) & MST_RW_BITS; | |
543 | ||
544 | /* re-init the bits affecting IN dma; careful with zlps */ | |
545 | if (likely(ep->is_in)) { | |
546 | if (unlikely(master & MST_RD_ENA)) { | |
547 | DBG (ep->dev, "start, IN active dma %03x!!\n", | |
548 | master); | |
549 | // return -EL2HLT; | |
550 | } | |
551 | writel(end, ®s->in_dma_end); | |
552 | writel(start, ®s->in_dma_start); | |
553 | ||
554 | master &= ~MST_R_BITS; | |
555 | if (unlikely(req->req.length == 0)) | |
556 | master = MST_RD_ENA | MST_RD_EOPB; | |
557 | else if ((req->req.length % ep->ep.maxpacket) != 0 | |
558 | || req->req.zero) | |
559 | master = MST_RD_ENA | MST_EOPB_ENA; | |
560 | else | |
561 | master = MST_RD_ENA | MST_EOPB_DIS; | |
562 | ||
563 | ep->dev->int_enable |= INT_MSTRDEND; | |
564 | ||
565 | /* Goku DMA-OUT merges short packets, which plays poorly with | |
566 | * protocols where short packets mark the transfer boundaries. | |
567 | * The chip supports a nonstandard policy with INT_MSTWRTMOUT, | |
568 | * ending transfers after 3 SOFs; we don't turn it on. | |
569 | */ | |
570 | } else { | |
571 | if (unlikely(master & MST_WR_ENA)) { | |
572 | DBG (ep->dev, "start, OUT active dma %03x!!\n", | |
573 | master); | |
574 | // return -EL2HLT; | |
575 | } | |
576 | writel(end, ®s->out_dma_end); | |
577 | writel(start, ®s->out_dma_start); | |
578 | ||
579 | master &= ~MST_W_BITS; | |
580 | master |= MST_WR_ENA | MST_TIMEOUT_DIS; | |
581 | ||
582 | ep->dev->int_enable |= INT_MSTWREND|INT_MSTWRTMOUT; | |
583 | } | |
584 | ||
585 | writel(master, ®s->dma_master); | |
586 | writel(ep->dev->int_enable, ®s->int_enable); | |
587 | return 0; | |
588 | } | |
589 | ||
590 | static void dma_advance(struct goku_udc *dev, struct goku_ep *ep) | |
591 | { | |
592 | struct goku_request *req; | |
593 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
594 | u32 master; | |
595 | ||
596 | master = readl(®s->dma_master); | |
597 | ||
598 | if (unlikely(list_empty(&ep->queue))) { | |
599 | stop: | |
600 | if (ep->is_in) | |
601 | dev->int_enable &= ~INT_MSTRDEND; | |
602 | else | |
603 | dev->int_enable &= ~(INT_MSTWREND|INT_MSTWRTMOUT); | |
604 | writel(dev->int_enable, ®s->int_enable); | |
605 | return; | |
606 | } | |
607 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
608 | ||
609 | /* normal hw dma completion (not abort) */ | |
610 | if (likely(ep->is_in)) { | |
611 | if (unlikely(master & MST_RD_ENA)) | |
612 | return; | |
613 | req->req.actual = readl(®s->in_dma_current); | |
614 | } else { | |
615 | if (unlikely(master & MST_WR_ENA)) | |
616 | return; | |
617 | ||
618 | /* hardware merges short packets, and also hides packet | |
619 | * overruns. a partial packet MAY be in the fifo here. | |
620 | */ | |
621 | req->req.actual = readl(®s->out_dma_current); | |
622 | } | |
623 | req->req.actual -= req->req.dma; | |
624 | req->req.actual++; | |
625 | ||
626 | #ifdef USB_TRACE | |
627 | VDBG(dev, "done %s %s dma, %u/%u bytes, req %p\n", | |
628 | ep->ep.name, ep->is_in ? "IN" : "OUT", | |
629 | req->req.actual, req->req.length, req); | |
630 | #endif | |
631 | done(ep, req, 0); | |
632 | if (list_empty(&ep->queue)) | |
633 | goto stop; | |
634 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
635 | (void) start_dma(ep, req); | |
636 | } | |
637 | ||
638 | static void abort_dma(struct goku_ep *ep, int status) | |
639 | { | |
640 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
641 | struct goku_request *req; | |
642 | u32 curr, master; | |
643 | ||
644 | /* NAK future host requests, hoping the implicit delay lets the | |
645 | * dma engine finish reading (or writing) its latest packet and | |
646 | * empty the dma buffer (up to 16 bytes). | |
647 | * | |
648 | * This avoids needing to clean up a partial packet in the fifo; | |
649 | * we can't do that for IN without side effects to HALT and TOGGLE. | |
650 | */ | |
651 | command(regs, COMMAND_FIFO_DISABLE, ep->num); | |
652 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
653 | master = readl(®s->dma_master) & MST_RW_BITS; | |
654 | ||
655 | /* FIXME using these resets isn't usably documented. this may | |
656 | * not work unless it's followed by disabling the endpoint. | |
657 | * | |
658 | * FIXME the OUT reset path doesn't even behave consistently. | |
659 | */ | |
660 | if (ep->is_in) { | |
661 | if (unlikely((readl(®s->dma_master) & MST_RD_ENA) == 0)) | |
662 | goto finished; | |
663 | curr = readl(®s->in_dma_current); | |
664 | ||
665 | writel(curr, ®s->in_dma_end); | |
666 | writel(curr, ®s->in_dma_start); | |
667 | ||
668 | master &= ~MST_R_BITS; | |
669 | master |= MST_RD_RESET; | |
670 | writel(master, ®s->dma_master); | |
671 | ||
672 | if (readl(®s->dma_master) & MST_RD_ENA) | |
673 | DBG(ep->dev, "IN dma active after reset!\n"); | |
674 | ||
675 | } else { | |
676 | if (unlikely((readl(®s->dma_master) & MST_WR_ENA) == 0)) | |
677 | goto finished; | |
678 | curr = readl(®s->out_dma_current); | |
679 | ||
680 | writel(curr, ®s->out_dma_end); | |
681 | writel(curr, ®s->out_dma_start); | |
682 | ||
683 | master &= ~MST_W_BITS; | |
684 | master |= MST_WR_RESET; | |
685 | writel(master, ®s->dma_master); | |
686 | ||
687 | if (readl(®s->dma_master) & MST_WR_ENA) | |
688 | DBG(ep->dev, "OUT dma active after reset!\n"); | |
689 | } | |
690 | req->req.actual = (curr - req->req.dma) + 1; | |
691 | req->req.status = status; | |
692 | ||
441b62c1 | 693 | VDBG(ep->dev, "%s %s %s %d/%d\n", __func__, ep->ep.name, |
1da177e4 LT |
694 | ep->is_in ? "IN" : "OUT", |
695 | req->req.actual, req->req.length); | |
696 | ||
697 | command(regs, COMMAND_FIFO_ENABLE, ep->num); | |
698 | ||
699 | return; | |
700 | ||
701 | finished: | |
702 | /* dma already completed; no abort needed */ | |
703 | command(regs, COMMAND_FIFO_ENABLE, ep->num); | |
704 | req->req.actual = req->req.length; | |
705 | req->req.status = 0; | |
706 | } | |
707 | ||
708 | /*-------------------------------------------------------------------------*/ | |
709 | ||
710 | static int | |
55016f10 | 711 | goku_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) |
1da177e4 LT |
712 | { |
713 | struct goku_request *req; | |
714 | struct goku_ep *ep; | |
715 | struct goku_udc *dev; | |
716 | unsigned long flags; | |
717 | int status; | |
718 | ||
719 | /* always require a cpu-view buffer so pio works */ | |
720 | req = container_of(_req, struct goku_request, req); | |
721 | if (unlikely(!_req || !_req->complete | |
722 | || !_req->buf || !list_empty(&req->queue))) | |
723 | return -EINVAL; | |
724 | ep = container_of(_ep, struct goku_ep, ep); | |
db79d981 | 725 | if (unlikely(!_ep || (!ep->ep.desc && ep->num != 0))) |
1da177e4 LT |
726 | return -EINVAL; |
727 | dev = ep->dev; | |
728 | if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) | |
729 | return -ESHUTDOWN; | |
730 | ||
731 | /* can't touch registers when suspended */ | |
732 | if (dev->ep0state == EP0_SUSPEND) | |
733 | return -EBUSY; | |
734 | ||
735 | /* set up dma mapping in case the caller didn't */ | |
6440093f FB |
736 | if (ep->dma) { |
737 | status = usb_gadget_map_request(&dev->gadget, &req->req, | |
738 | ep->is_in); | |
739 | if (status) | |
740 | return status; | |
1da177e4 LT |
741 | } |
742 | ||
743 | #ifdef USB_TRACE | |
744 | VDBG(dev, "%s queue req %p, len %u buf %p\n", | |
745 | _ep->name, _req, _req->length, _req->buf); | |
746 | #endif | |
747 | ||
748 | spin_lock_irqsave(&dev->lock, flags); | |
749 | ||
750 | _req->status = -EINPROGRESS; | |
751 | _req->actual = 0; | |
752 | ||
753 | /* for ep0 IN without premature status, zlp is required and | |
754 | * writing EOP starts the status stage (OUT). | |
755 | */ | |
756 | if (unlikely(ep->num == 0 && ep->is_in)) | |
757 | _req->zero = 1; | |
758 | ||
759 | /* kickstart this i/o queue? */ | |
760 | status = 0; | |
761 | if (list_empty(&ep->queue) && likely(!ep->stopped)) { | |
762 | /* dma: done after dma completion IRQ (or error) | |
763 | * pio: done after last fifo operation | |
764 | */ | |
765 | if (ep->dma) | |
766 | status = start_dma(ep, req); | |
767 | else | |
768 | status = (ep->is_in ? write_fifo : read_fifo)(ep, req); | |
769 | ||
770 | if (unlikely(status != 0)) { | |
771 | if (status > 0) | |
772 | status = 0; | |
773 | req = NULL; | |
774 | } | |
775 | ||
776 | } /* else pio or dma irq handler advances the queue. */ | |
777 | ||
027ca0d2 | 778 | if (likely(req != NULL)) |
1da177e4 LT |
779 | list_add_tail(&req->queue, &ep->queue); |
780 | ||
781 | if (likely(!list_empty(&ep->queue)) | |
782 | && likely(ep->num != 0) | |
783 | && !ep->dma | |
784 | && !(dev->int_enable & INT_EPxDATASET (ep->num))) | |
785 | pio_irq_enable(dev, dev->regs, ep->num); | |
786 | ||
787 | spin_unlock_irqrestore(&dev->lock, flags); | |
788 | ||
789 | /* pci writes may still be posted */ | |
790 | return status; | |
791 | } | |
792 | ||
793 | /* dequeue ALL requests */ | |
794 | static void nuke(struct goku_ep *ep, int status) | |
795 | { | |
796 | struct goku_request *req; | |
797 | ||
798 | ep->stopped = 1; | |
799 | if (list_empty(&ep->queue)) | |
800 | return; | |
801 | if (ep->dma) | |
802 | abort_dma(ep, status); | |
803 | while (!list_empty(&ep->queue)) { | |
804 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
805 | done(ep, req, status); | |
806 | } | |
807 | } | |
808 | ||
809 | /* dequeue JUST ONE request */ | |
810 | static int goku_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
811 | { | |
812 | struct goku_request *req; | |
813 | struct goku_ep *ep; | |
814 | struct goku_udc *dev; | |
815 | unsigned long flags; | |
816 | ||
817 | ep = container_of(_ep, struct goku_ep, ep); | |
db79d981 | 818 | if (!_ep || !_req || (!ep->ep.desc && ep->num != 0)) |
1da177e4 LT |
819 | return -EINVAL; |
820 | dev = ep->dev; | |
821 | if (!dev->driver) | |
822 | return -ESHUTDOWN; | |
823 | ||
824 | /* we can't touch (dma) registers when suspended */ | |
825 | if (dev->ep0state == EP0_SUSPEND) | |
826 | return -EBUSY; | |
827 | ||
441b62c1 | 828 | VDBG(dev, "%s %s %s %s %p\n", __func__, _ep->name, |
1da177e4 LT |
829 | ep->is_in ? "IN" : "OUT", |
830 | ep->dma ? "dma" : "pio", | |
831 | _req); | |
832 | ||
833 | spin_lock_irqsave(&dev->lock, flags); | |
834 | ||
835 | /* make sure it's actually queued on this endpoint */ | |
836 | list_for_each_entry (req, &ep->queue, queue) { | |
837 | if (&req->req == _req) | |
838 | break; | |
839 | } | |
840 | if (&req->req != _req) { | |
841 | spin_unlock_irqrestore (&dev->lock, flags); | |
842 | return -EINVAL; | |
843 | } | |
844 | ||
845 | if (ep->dma && ep->queue.next == &req->queue && !ep->stopped) { | |
846 | abort_dma(ep, -ECONNRESET); | |
847 | done(ep, req, -ECONNRESET); | |
848 | dma_advance(dev, ep); | |
849 | } else if (!list_empty(&req->queue)) | |
850 | done(ep, req, -ECONNRESET); | |
851 | else | |
852 | req = NULL; | |
853 | spin_unlock_irqrestore(&dev->lock, flags); | |
854 | ||
855 | return req ? 0 : -EOPNOTSUPP; | |
856 | } | |
857 | ||
858 | /*-------------------------------------------------------------------------*/ | |
859 | ||
860 | static void goku_clear_halt(struct goku_ep *ep) | |
861 | { | |
862 | // assert (ep->num !=0) | |
863 | VDBG(ep->dev, "%s clear halt\n", ep->ep.name); | |
864 | command(ep->dev->regs, COMMAND_SETDATA0, ep->num); | |
865 | command(ep->dev->regs, COMMAND_STALL_CLEAR, ep->num); | |
866 | if (ep->stopped) { | |
867 | ep->stopped = 0; | |
868 | if (ep->dma) { | |
869 | struct goku_request *req; | |
870 | ||
871 | if (list_empty(&ep->queue)) | |
872 | return; | |
873 | req = list_entry(ep->queue.next, struct goku_request, | |
874 | queue); | |
875 | (void) start_dma(ep, req); | |
876 | } else | |
877 | pio_advance(ep); | |
878 | } | |
879 | } | |
880 | ||
881 | static int goku_set_halt(struct usb_ep *_ep, int value) | |
882 | { | |
883 | struct goku_ep *ep; | |
884 | unsigned long flags; | |
885 | int retval = 0; | |
886 | ||
887 | if (!_ep) | |
888 | return -ENODEV; | |
889 | ep = container_of (_ep, struct goku_ep, ep); | |
890 | ||
891 | if (ep->num == 0) { | |
892 | if (value) { | |
893 | ep->dev->ep0state = EP0_STALL; | |
894 | ep->dev->ep[0].stopped = 1; | |
895 | } else | |
896 | return -EINVAL; | |
897 | ||
898 | /* don't change EPxSTATUS_EP_INVALID to READY */ | |
db79d981 | 899 | } else if (!ep->ep.desc) { |
441b62c1 | 900 | DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name); |
1da177e4 LT |
901 | return -EINVAL; |
902 | } | |
903 | ||
904 | spin_lock_irqsave(&ep->dev->lock, flags); | |
905 | if (!list_empty(&ep->queue)) | |
906 | retval = -EAGAIN; | |
907 | else if (ep->is_in && value | |
908 | /* data in (either) packet buffer? */ | |
909 | && (readl(&ep->dev->regs->DataSet) | |
910 | & DATASET_AB(ep->num))) | |
911 | retval = -EAGAIN; | |
912 | else if (!value) | |
913 | goku_clear_halt(ep); | |
914 | else { | |
915 | ep->stopped = 1; | |
916 | VDBG(ep->dev, "%s set halt\n", ep->ep.name); | |
917 | command(ep->dev->regs, COMMAND_STALL, ep->num); | |
918 | readl(ep->reg_status); | |
919 | } | |
920 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
921 | return retval; | |
922 | } | |
923 | ||
924 | static int goku_fifo_status(struct usb_ep *_ep) | |
925 | { | |
926 | struct goku_ep *ep; | |
927 | struct goku_udc_regs __iomem *regs; | |
928 | u32 size; | |
929 | ||
930 | if (!_ep) | |
931 | return -ENODEV; | |
932 | ep = container_of(_ep, struct goku_ep, ep); | |
933 | ||
934 | /* size is only reported sanely for OUT */ | |
935 | if (ep->is_in) | |
936 | return -EOPNOTSUPP; | |
937 | ||
938 | /* ignores 16-byte dma buffer; SizeH == 0 */ | |
939 | regs = ep->dev->regs; | |
940 | size = readl(®s->EPxSizeLA[ep->num]) & DATASIZE; | |
941 | size += readl(®s->EPxSizeLB[ep->num]) & DATASIZE; | |
441b62c1 | 942 | VDBG(ep->dev, "%s %s %u\n", __func__, ep->ep.name, size); |
1da177e4 LT |
943 | return size; |
944 | } | |
945 | ||
946 | static void goku_fifo_flush(struct usb_ep *_ep) | |
947 | { | |
948 | struct goku_ep *ep; | |
949 | struct goku_udc_regs __iomem *regs; | |
950 | u32 size; | |
951 | ||
952 | if (!_ep) | |
953 | return; | |
954 | ep = container_of(_ep, struct goku_ep, ep); | |
441b62c1 | 955 | VDBG(ep->dev, "%s %s\n", __func__, ep->ep.name); |
1da177e4 LT |
956 | |
957 | /* don't change EPxSTATUS_EP_INVALID to READY */ | |
db79d981 | 958 | if (!ep->ep.desc && ep->num != 0) { |
441b62c1 | 959 | DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name); |
1da177e4 LT |
960 | return; |
961 | } | |
962 | ||
963 | regs = ep->dev->regs; | |
964 | size = readl(®s->EPxSizeLA[ep->num]); | |
965 | size &= DATASIZE; | |
966 | ||
967 | /* Non-desirable behavior: FIFO_CLEAR also clears the | |
968 | * endpoint halt feature. For OUT, we _could_ just read | |
969 | * the bytes out (PIO, if !ep->dma); for in, no choice. | |
970 | */ | |
971 | if (size) | |
972 | command(regs, COMMAND_FIFO_CLEAR, ep->num); | |
973 | } | |
974 | ||
977ac789 | 975 | static const struct usb_ep_ops goku_ep_ops = { |
1da177e4 LT |
976 | .enable = goku_ep_enable, |
977 | .disable = goku_ep_disable, | |
978 | ||
979 | .alloc_request = goku_alloc_request, | |
980 | .free_request = goku_free_request, | |
981 | ||
1da177e4 LT |
982 | .queue = goku_queue, |
983 | .dequeue = goku_dequeue, | |
984 | ||
985 | .set_halt = goku_set_halt, | |
986 | .fifo_status = goku_fifo_status, | |
987 | .fifo_flush = goku_fifo_flush, | |
988 | }; | |
989 | ||
990 | /*-------------------------------------------------------------------------*/ | |
991 | ||
992 | static int goku_get_frame(struct usb_gadget *_gadget) | |
993 | { | |
994 | return -EOPNOTSUPP; | |
995 | } | |
996 | ||
8cc67b7b RB |
997 | static struct usb_ep *goku_match_ep(struct usb_gadget *g, |
998 | struct usb_endpoint_descriptor *desc, | |
999 | struct usb_ss_ep_comp_descriptor *ep_comp) | |
1000 | { | |
1001 | struct goku_udc *dev = to_goku_udc(g); | |
1002 | struct usb_ep *ep; | |
1003 | ||
1004 | switch (usb_endpoint_type(desc)) { | |
1005 | case USB_ENDPOINT_XFER_INT: | |
1006 | /* single buffering is enough */ | |
1007 | ep = &dev->ep[3].ep; | |
1008 | if (usb_gadget_ep_match_desc(g, ep, desc, ep_comp)) | |
1009 | return ep; | |
1010 | break; | |
1011 | case USB_ENDPOINT_XFER_BULK: | |
1012 | if (usb_endpoint_dir_in(desc)) { | |
1013 | /* DMA may be available */ | |
1014 | ep = &dev->ep[2].ep; | |
1015 | if (usb_gadget_ep_match_desc(g, ep, desc, ep_comp)) | |
1016 | return ep; | |
1017 | } | |
1018 | break; | |
1019 | default: | |
1020 | /* nothing */ ; | |
1021 | } | |
1022 | ||
1023 | return NULL; | |
1024 | } | |
1025 | ||
950b3c1d FB |
1026 | static int goku_udc_start(struct usb_gadget *g, |
1027 | struct usb_gadget_driver *driver); | |
22835b80 | 1028 | static int goku_udc_stop(struct usb_gadget *g); |
0f91349b | 1029 | |
1da177e4 LT |
1030 | static const struct usb_gadget_ops goku_ops = { |
1031 | .get_frame = goku_get_frame, | |
950b3c1d FB |
1032 | .udc_start = goku_udc_start, |
1033 | .udc_stop = goku_udc_stop, | |
8cc67b7b | 1034 | .match_ep = goku_match_ep, |
1da177e4 LT |
1035 | // no remote wakeup |
1036 | // not selfpowered | |
1037 | }; | |
1038 | ||
1039 | /*-------------------------------------------------------------------------*/ | |
1040 | ||
96c7a22e | 1041 | static inline const char *dmastr(void) |
1da177e4 LT |
1042 | { |
1043 | if (use_dma == 0) | |
1044 | return "(dma disabled)"; | |
1045 | else if (use_dma == 2) | |
1046 | return "(dma IN and OUT)"; | |
1047 | else | |
1048 | return "(dma IN)"; | |
1049 | } | |
1050 | ||
1051 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
1052 | ||
1053 | static const char proc_node_name [] = "driver/udc"; | |
1054 | ||
1055 | #define FOURBITS "%s%s%s%s" | |
1056 | #define EIGHTBITS FOURBITS FOURBITS | |
1057 | ||
96c7a22e | 1058 | static void dump_intmask(struct seq_file *m, const char *label, u32 mask) |
1da177e4 | 1059 | { |
1da177e4 | 1060 | /* int_status is the same format ... */ |
557f3586 JP |
1061 | seq_printf(m, "%s %05X =" FOURBITS EIGHTBITS EIGHTBITS "\n", |
1062 | label, mask, | |
1063 | (mask & INT_PWRDETECT) ? " power" : "", | |
1064 | (mask & INT_SYSERROR) ? " sys" : "", | |
1065 | (mask & INT_MSTRDEND) ? " in-dma" : "", | |
1066 | (mask & INT_MSTWRTMOUT) ? " wrtmo" : "", | |
1067 | ||
1068 | (mask & INT_MSTWREND) ? " out-dma" : "", | |
1069 | (mask & INT_MSTWRSET) ? " wrset" : "", | |
1070 | (mask & INT_ERR) ? " err" : "", | |
1071 | (mask & INT_SOF) ? " sof" : "", | |
1072 | ||
1073 | (mask & INT_EP3NAK) ? " ep3nak" : "", | |
1074 | (mask & INT_EP2NAK) ? " ep2nak" : "", | |
1075 | (mask & INT_EP1NAK) ? " ep1nak" : "", | |
1076 | (mask & INT_EP3DATASET) ? " ep3" : "", | |
1077 | ||
1078 | (mask & INT_EP2DATASET) ? " ep2" : "", | |
1079 | (mask & INT_EP1DATASET) ? " ep1" : "", | |
1080 | (mask & INT_STATUSNAK) ? " ep0snak" : "", | |
1081 | (mask & INT_STATUS) ? " ep0status" : "", | |
1082 | ||
1083 | (mask & INT_SETUP) ? " setup" : "", | |
1084 | (mask & INT_ENDPOINT0) ? " ep0" : "", | |
1085 | (mask & INT_USBRESET) ? " reset" : "", | |
1086 | (mask & INT_SUSPEND) ? " suspend" : ""); | |
1087 | } | |
1088 | ||
1089 | static const char *udc_ep_state(enum ep0state state) | |
1090 | { | |
1091 | switch (state) { | |
1092 | case EP0_DISCONNECT: | |
1093 | return "ep0_disconnect"; | |
1094 | case EP0_IDLE: | |
1095 | return "ep0_idle"; | |
1096 | case EP0_IN: | |
1097 | return "ep0_in"; | |
1098 | case EP0_OUT: | |
1099 | return "ep0_out"; | |
1100 | case EP0_STATUS: | |
1101 | return "ep0_status"; | |
1102 | case EP0_STALL: | |
1103 | return "ep0_stall"; | |
1104 | case EP0_SUSPEND: | |
1105 | return "ep0_suspend"; | |
1106 | } | |
1107 | ||
1108 | return "ep0_?"; | |
1da177e4 LT |
1109 | } |
1110 | ||
557f3586 JP |
1111 | static const char *udc_ep_status(u32 status) |
1112 | { | |
1113 | switch (status & EPxSTATUS_EP_MASK) { | |
1114 | case EPxSTATUS_EP_READY: | |
1115 | return "ready"; | |
1116 | case EPxSTATUS_EP_DATAIN: | |
1117 | return "packet"; | |
1118 | case EPxSTATUS_EP_FULL: | |
1119 | return "full"; | |
1120 | case EPxSTATUS_EP_TX_ERR: /* host will retry */ | |
1121 | return "tx_err"; | |
1122 | case EPxSTATUS_EP_RX_ERR: | |
1123 | return "rx_err"; | |
1124 | case EPxSTATUS_EP_BUSY: /* ep0 only */ | |
1125 | return "busy"; | |
1126 | case EPxSTATUS_EP_STALL: | |
1127 | return "stall"; | |
1128 | case EPxSTATUS_EP_INVALID: /* these "can't happen" */ | |
1129 | return "invalid"; | |
1130 | } | |
1131 | ||
1132 | return "?"; | |
1133 | } | |
1da177e4 | 1134 | |
96c7a22e | 1135 | static int udc_proc_read(struct seq_file *m, void *v) |
1da177e4 | 1136 | { |
96c7a22e | 1137 | struct goku_udc *dev = m->private; |
1da177e4 | 1138 | struct goku_udc_regs __iomem *regs = dev->regs; |
1da177e4 | 1139 | unsigned long flags; |
96c7a22e | 1140 | int i, is_usb_connected; |
1da177e4 LT |
1141 | u32 tmp; |
1142 | ||
1da177e4 LT |
1143 | local_irq_save(flags); |
1144 | ||
1145 | /* basic device status */ | |
1146 | tmp = readl(®s->power_detect); | |
1147 | is_usb_connected = tmp & PW_DETECT; | |
96c7a22e | 1148 | seq_printf(m, |
557f3586 JP |
1149 | "%s - %s\n" |
1150 | "%s version: %s %s\n" | |
1151 | "Gadget driver: %s\n" | |
1152 | "Host %s, %s\n" | |
1153 | "\n", | |
1154 | pci_name(dev->pdev), driver_desc, | |
1155 | driver_name, DRIVER_VERSION, dmastr(), | |
1156 | dev->driver ? dev->driver->driver.name : "(none)", | |
1157 | is_usb_connected | |
1158 | ? ((tmp & PW_PULLUP) ? "full speed" : "powered") | |
1159 | : "disconnected", | |
1160 | udc_ep_state(dev->ep0state)); | |
1da177e4 | 1161 | |
96c7a22e DH |
1162 | dump_intmask(m, "int_status", readl(®s->int_status)); |
1163 | dump_intmask(m, "int_enable", readl(®s->int_enable)); | |
1da177e4 LT |
1164 | |
1165 | if (!is_usb_connected || !dev->driver || (tmp & PW_PULLUP) == 0) | |
1166 | goto done; | |
1167 | ||
1168 | /* registers for (active) device and ep0 */ | |
557f3586 JP |
1169 | seq_printf(m, "\nirqs %lu\ndataset %02x single.bcs %02x.%02x state %x addr %u\n", |
1170 | dev->irqs, readl(®s->DataSet), | |
1171 | readl(®s->EPxSingle), readl(®s->EPxBCS), | |
1172 | readl(®s->UsbState), | |
1173 | readl(®s->address)); | |
1174 | if (seq_has_overflowed(m)) | |
96c7a22e | 1175 | goto done; |
1da177e4 LT |
1176 | |
1177 | tmp = readl(®s->dma_master); | |
557f3586 JP |
1178 | seq_printf(m, "dma %03X =" EIGHTBITS "%s %s\n", |
1179 | tmp, | |
1180 | (tmp & MST_EOPB_DIS) ? " eopb-" : "", | |
1181 | (tmp & MST_EOPB_ENA) ? " eopb+" : "", | |
1182 | (tmp & MST_TIMEOUT_DIS) ? " tmo-" : "", | |
1183 | (tmp & MST_TIMEOUT_ENA) ? " tmo+" : "", | |
1184 | ||
1185 | (tmp & MST_RD_EOPB) ? " eopb" : "", | |
1186 | (tmp & MST_RD_RESET) ? " in_reset" : "", | |
1187 | (tmp & MST_WR_RESET) ? " out_reset" : "", | |
1188 | (tmp & MST_RD_ENA) ? " IN" : "", | |
1189 | ||
1190 | (tmp & MST_WR_ENA) ? " OUT" : "", | |
1191 | (tmp & MST_CONNECTION) ? "ep1in/ep2out" : "ep1out/ep2in"); | |
1192 | if (seq_has_overflowed(m)) | |
96c7a22e | 1193 | goto done; |
1da177e4 LT |
1194 | |
1195 | /* dump endpoint queues */ | |
1196 | for (i = 0; i < 4; i++) { | |
1197 | struct goku_ep *ep = &dev->ep [i]; | |
1198 | struct goku_request *req; | |
1da177e4 | 1199 | |
db79d981 | 1200 | if (i && !ep->ep.desc) |
1da177e4 LT |
1201 | continue; |
1202 | ||
1203 | tmp = readl(ep->reg_status); | |
557f3586 JP |
1204 | seq_printf(m, "%s %s max %u %s, irqs %lu, status %02x (%s) " FOURBITS "\n", |
1205 | ep->ep.name, | |
1206 | ep->is_in ? "in" : "out", | |
1207 | ep->ep.maxpacket, | |
1208 | ep->dma ? "dma" : "pio", | |
1209 | ep->irqs, | |
1210 | tmp, udc_ep_status(tmp), | |
1211 | (tmp & EPxSTATUS_TOGGLE) ? "data1" : "data0", | |
1212 | (tmp & EPxSTATUS_SUSPEND) ? " suspend" : "", | |
1213 | (tmp & EPxSTATUS_FIFO_DISABLE) ? " disable" : "", | |
1214 | (tmp & EPxSTATUS_STAGE_ERROR) ? " ep0stat" : ""); | |
1215 | if (seq_has_overflowed(m)) | |
1da177e4 | 1216 | goto done; |
1da177e4 LT |
1217 | |
1218 | if (list_empty(&ep->queue)) { | |
557f3586 JP |
1219 | seq_puts(m, "\t(nothing queued)\n"); |
1220 | if (seq_has_overflowed(m)) | |
1da177e4 | 1221 | goto done; |
1da177e4 LT |
1222 | continue; |
1223 | } | |
1224 | list_for_each_entry(req, &ep->queue, queue) { | |
1225 | if (ep->dma && req->queue.prev == &ep->queue) { | |
1226 | if (i == UDC_MSTRD_ENDPOINT) | |
1227 | tmp = readl(®s->in_dma_current); | |
1228 | else | |
1229 | tmp = readl(®s->out_dma_current); | |
1230 | tmp -= req->req.dma; | |
1231 | tmp++; | |
1232 | } else | |
1233 | tmp = req->req.actual; | |
1234 | ||
557f3586 JP |
1235 | seq_printf(m, "\treq %p len %u/%u buf %p\n", |
1236 | &req->req, tmp, req->req.length, | |
1237 | req->req.buf); | |
1238 | if (seq_has_overflowed(m)) | |
1da177e4 | 1239 | goto done; |
1da177e4 LT |
1240 | } |
1241 | } | |
1242 | ||
1243 | done: | |
1244 | local_irq_restore(flags); | |
96c7a22e DH |
1245 | return 0; |
1246 | } | |
1da177e4 LT |
1247 | #endif /* CONFIG_USB_GADGET_DEBUG_FILES */ |
1248 | ||
1249 | /*-------------------------------------------------------------------------*/ | |
1250 | ||
1251 | static void udc_reinit (struct goku_udc *dev) | |
1252 | { | |
1253 | static char *names [] = { "ep0", "ep1-bulk", "ep2-bulk", "ep3-bulk" }; | |
2d70c99b | 1254 | |
1da177e4 LT |
1255 | unsigned i; |
1256 | ||
1257 | INIT_LIST_HEAD (&dev->gadget.ep_list); | |
1258 | dev->gadget.ep0 = &dev->ep [0].ep; | |
1259 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
1260 | dev->ep0state = EP0_DISCONNECT; | |
1261 | dev->irqs = 0; | |
1262 | ||
1263 | for (i = 0; i < 4; i++) { | |
1264 | struct goku_ep *ep = &dev->ep[i]; | |
1265 | ||
1266 | ep->num = i; | |
1267 | ep->ep.name = names[i]; | |
1268 | ep->reg_fifo = &dev->regs->ep_fifo [i]; | |
1269 | ep->reg_status = &dev->regs->ep_status [i]; | |
1270 | ep->reg_mode = &dev->regs->ep_mode[i]; | |
1271 | ||
1272 | ep->ep.ops = &goku_ep_ops; | |
1273 | list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list); | |
1274 | ep->dev = dev; | |
1275 | INIT_LIST_HEAD (&ep->queue); | |
1276 | ||
1277 | ep_reset(NULL, ep); | |
b0bf5fbf RB |
1278 | |
1279 | if (i == 0) | |
1280 | ep->ep.caps.type_control = true; | |
1281 | else | |
1282 | ep->ep.caps.type_bulk = true; | |
1283 | ||
1284 | ep->ep.caps.dir_in = true; | |
1285 | ep->ep.caps.dir_out = true; | |
1da177e4 LT |
1286 | } |
1287 | ||
1288 | dev->ep[0].reg_mode = NULL; | |
e117e742 | 1289 | usb_ep_set_maxpacket_limit(&dev->ep[0].ep, MAX_EP0_SIZE); |
1da177e4 LT |
1290 | list_del_init (&dev->ep[0].ep.ep_list); |
1291 | } | |
1292 | ||
1293 | static void udc_reset(struct goku_udc *dev) | |
1294 | { | |
1295 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1296 | ||
1297 | writel(0, ®s->power_detect); | |
1298 | writel(0, ®s->int_enable); | |
1299 | readl(®s->int_enable); | |
1300 | dev->int_enable = 0; | |
1301 | ||
1302 | /* deassert reset, leave USB D+ at hi-Z (no pullup) | |
1303 | * don't let INT_PWRDETECT sequence begin | |
1304 | */ | |
1305 | udelay(250); | |
1306 | writel(PW_RESETB, ®s->power_detect); | |
1307 | readl(®s->int_enable); | |
1308 | } | |
1309 | ||
1310 | static void ep0_start(struct goku_udc *dev) | |
1311 | { | |
1312 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1313 | unsigned i; | |
1314 | ||
441b62c1 | 1315 | VDBG(dev, "%s\n", __func__); |
1da177e4 LT |
1316 | |
1317 | udc_reset(dev); | |
1318 | udc_reinit (dev); | |
1319 | //writel(MST_EOPB_ENA | MST_TIMEOUT_ENA, ®s->dma_master); | |
1320 | ||
1321 | /* hw handles set_address, set_feature, get_status; maybe more */ | |
1322 | writel( G_REQMODE_SET_INTF | G_REQMODE_GET_INTF | |
1323 | | G_REQMODE_SET_CONF | G_REQMODE_GET_CONF | |
1324 | | G_REQMODE_GET_DESC | |
1325 | | G_REQMODE_CLEAR_FEAT | |
1326 | , ®s->reqmode); | |
1327 | ||
1328 | for (i = 0; i < 4; i++) | |
1329 | dev->ep[i].irqs = 0; | |
1330 | ||
1331 | /* can't modify descriptors after writing UsbReady */ | |
1332 | for (i = 0; i < DESC_LEN; i++) | |
1333 | writel(0, ®s->descriptors[i]); | |
1334 | writel(0, ®s->UsbReady); | |
1335 | ||
1336 | /* expect ep0 requests when the host drops reset */ | |
1337 | writel(PW_RESETB | PW_PULLUP, ®s->power_detect); | |
1338 | dev->int_enable = INT_DEVWIDE | INT_EP0; | |
1339 | writel(dev->int_enable, &dev->regs->int_enable); | |
1340 | readl(®s->int_enable); | |
1341 | dev->gadget.speed = USB_SPEED_FULL; | |
1342 | dev->ep0state = EP0_IDLE; | |
1343 | } | |
1344 | ||
1345 | static void udc_enable(struct goku_udc *dev) | |
1346 | { | |
1347 | /* start enumeration now, or after power detect irq */ | |
1348 | if (readl(&dev->regs->power_detect) & PW_DETECT) | |
1349 | ep0_start(dev); | |
1350 | else { | |
441b62c1 | 1351 | DBG(dev, "%s\n", __func__); |
1da177e4 LT |
1352 | dev->int_enable = INT_PWRDETECT; |
1353 | writel(dev->int_enable, &dev->regs->int_enable); | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | /*-------------------------------------------------------------------------*/ | |
1358 | ||
1359 | /* keeping it simple: | |
1360 | * - one bus driver, initted first; | |
1361 | * - one function driver, initted second | |
1362 | */ | |
1363 | ||
1da177e4 LT |
1364 | /* when a driver is successfully registered, it will receive |
1365 | * control requests including set_configuration(), which enables | |
1366 | * non-control requests. then usb traffic follows until a | |
1367 | * disconnect is reported. then a host may connect again, or | |
1368 | * the driver might get unbound. | |
1369 | */ | |
950b3c1d FB |
1370 | static int goku_udc_start(struct usb_gadget *g, |
1371 | struct usb_gadget_driver *driver) | |
1da177e4 | 1372 | { |
950b3c1d | 1373 | struct goku_udc *dev = to_goku_udc(g); |
1da177e4 LT |
1374 | |
1375 | /* hook up the driver */ | |
1376 | driver->driver.bus = NULL; | |
1377 | dev->driver = driver; | |
1da177e4 | 1378 | |
950b3c1d FB |
1379 | /* |
1380 | * then enable host detection and ep0; and we're ready | |
1da177e4 LT |
1381 | * for set_configuration as well as eventual disconnect. |
1382 | */ | |
1383 | udc_enable(dev); | |
1384 | ||
1da177e4 LT |
1385 | return 0; |
1386 | } | |
1da177e4 | 1387 | |
4fbc5566 | 1388 | static void stop_activity(struct goku_udc *dev) |
1da177e4 LT |
1389 | { |
1390 | unsigned i; | |
1391 | ||
441b62c1 | 1392 | DBG (dev, "%s\n", __func__); |
1da177e4 | 1393 | |
1da177e4 LT |
1394 | /* disconnect gadget driver after quiesceing hw and the driver */ |
1395 | udc_reset (dev); | |
1396 | for (i = 0; i < 4; i++) | |
1397 | nuke(&dev->ep [i], -ESHUTDOWN); | |
1da177e4 LT |
1398 | |
1399 | if (dev->driver) | |
1400 | udc_enable(dev); | |
1401 | } | |
1402 | ||
22835b80 | 1403 | static int goku_udc_stop(struct usb_gadget *g) |
1da177e4 | 1404 | { |
950b3c1d | 1405 | struct goku_udc *dev = to_goku_udc(g); |
1da177e4 LT |
1406 | unsigned long flags; |
1407 | ||
1da177e4 LT |
1408 | spin_lock_irqsave(&dev->lock, flags); |
1409 | dev->driver = NULL; | |
4fbc5566 | 1410 | stop_activity(dev); |
1da177e4 | 1411 | spin_unlock_irqrestore(&dev->lock, flags); |
1da177e4 | 1412 | |
1da177e4 LT |
1413 | return 0; |
1414 | } | |
1da177e4 LT |
1415 | |
1416 | /*-------------------------------------------------------------------------*/ | |
1417 | ||
1418 | static void ep0_setup(struct goku_udc *dev) | |
1419 | { | |
1420 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1421 | struct usb_ctrlrequest ctrl; | |
1422 | int tmp; | |
1423 | ||
1424 | /* read SETUP packet and enter DATA stage */ | |
1425 | ctrl.bRequestType = readl(®s->bRequestType); | |
1426 | ctrl.bRequest = readl(®s->bRequest); | |
988199fe DB |
1427 | ctrl.wValue = cpu_to_le16((readl(®s->wValueH) << 8) |
1428 | | readl(®s->wValueL)); | |
1429 | ctrl.wIndex = cpu_to_le16((readl(®s->wIndexH) << 8) | |
1430 | | readl(®s->wIndexL)); | |
1431 | ctrl.wLength = cpu_to_le16((readl(®s->wLengthH) << 8) | |
1432 | | readl(®s->wLengthL)); | |
1da177e4 LT |
1433 | writel(0, ®s->SetupRecv); |
1434 | ||
1435 | nuke(&dev->ep[0], 0); | |
1436 | dev->ep[0].stopped = 0; | |
1437 | if (likely(ctrl.bRequestType & USB_DIR_IN)) { | |
1438 | dev->ep[0].is_in = 1; | |
1439 | dev->ep0state = EP0_IN; | |
1440 | /* detect early status stages */ | |
1441 | writel(ICONTROL_STATUSNAK, &dev->regs->IntControl); | |
1442 | } else { | |
1443 | dev->ep[0].is_in = 0; | |
1444 | dev->ep0state = EP0_OUT; | |
1445 | ||
1446 | /* NOTE: CLEAR_FEATURE is done in software so that we can | |
1447 | * synchronize transfer restarts after bulk IN stalls. data | |
1448 | * won't even enter the fifo until the halt is cleared. | |
1449 | */ | |
1450 | switch (ctrl.bRequest) { | |
1451 | case USB_REQ_CLEAR_FEATURE: | |
1452 | switch (ctrl.bRequestType) { | |
1453 | case USB_RECIP_ENDPOINT: | |
988199fe | 1454 | tmp = le16_to_cpu(ctrl.wIndex) & 0x0f; |
1da177e4 | 1455 | /* active endpoint */ |
db79d981 IS |
1456 | if (tmp > 3 || |
1457 | (!dev->ep[tmp].ep.desc && tmp != 0)) | |
1da177e4 | 1458 | goto stall; |
551509d2 | 1459 | if (ctrl.wIndex & cpu_to_le16( |
988199fe | 1460 | USB_DIR_IN)) { |
1da177e4 LT |
1461 | if (!dev->ep[tmp].is_in) |
1462 | goto stall; | |
1463 | } else { | |
1464 | if (dev->ep[tmp].is_in) | |
1465 | goto stall; | |
1466 | } | |
551509d2 | 1467 | if (ctrl.wValue != cpu_to_le16( |
988199fe | 1468 | USB_ENDPOINT_HALT)) |
1da177e4 LT |
1469 | goto stall; |
1470 | if (tmp) | |
1471 | goku_clear_halt(&dev->ep[tmp]); | |
1472 | succeed: | |
1473 | /* start ep0out status stage */ | |
1474 | writel(~(1<<0), ®s->EOP); | |
1475 | dev->ep[0].stopped = 1; | |
1476 | dev->ep0state = EP0_STATUS; | |
1477 | return; | |
1478 | case USB_RECIP_DEVICE: | |
1479 | /* device remote wakeup: always clear */ | |
551509d2 | 1480 | if (ctrl.wValue != cpu_to_le16(1)) |
1da177e4 LT |
1481 | goto stall; |
1482 | VDBG(dev, "clear dev remote wakeup\n"); | |
1483 | goto succeed; | |
1484 | case USB_RECIP_INTERFACE: | |
1485 | goto stall; | |
1486 | default: /* pass to gadget driver */ | |
1487 | break; | |
1488 | } | |
1489 | break; | |
1490 | default: | |
1491 | break; | |
1492 | } | |
1493 | } | |
1494 | ||
1495 | #ifdef USB_TRACE | |
1496 | VDBG(dev, "SETUP %02x.%02x v%04x i%04x l%04x\n", | |
1497 | ctrl.bRequestType, ctrl.bRequest, | |
988199fe DB |
1498 | le16_to_cpu(ctrl.wValue), le16_to_cpu(ctrl.wIndex), |
1499 | le16_to_cpu(ctrl.wLength)); | |
1da177e4 LT |
1500 | #endif |
1501 | ||
1502 | /* hw wants to know when we're configured (or not) */ | |
1503 | dev->req_config = (ctrl.bRequest == USB_REQ_SET_CONFIGURATION | |
1504 | && ctrl.bRequestType == USB_RECIP_DEVICE); | |
1505 | if (unlikely(dev->req_config)) | |
551509d2 | 1506 | dev->configured = (ctrl.wValue != cpu_to_le16(0)); |
1da177e4 LT |
1507 | |
1508 | /* delegate everything to the gadget driver. | |
1509 | * it may respond after this irq handler returns. | |
1510 | */ | |
1511 | spin_unlock (&dev->lock); | |
1512 | tmp = dev->driver->setup(&dev->gadget, &ctrl); | |
1513 | spin_lock (&dev->lock); | |
1514 | if (unlikely(tmp < 0)) { | |
1515 | stall: | |
1516 | #ifdef USB_TRACE | |
1517 | VDBG(dev, "req %02x.%02x protocol STALL; err %d\n", | |
1518 | ctrl.bRequestType, ctrl.bRequest, tmp); | |
1519 | #endif | |
1520 | command(regs, COMMAND_STALL, 0); | |
1521 | dev->ep[0].stopped = 1; | |
1522 | dev->ep0state = EP0_STALL; | |
1523 | } | |
1524 | ||
1525 | /* expect at least one data or status stage irq */ | |
1526 | } | |
1527 | ||
1528 | #define ACK(irqbit) { \ | |
1529 | stat &= ~irqbit; \ | |
1530 | writel(~irqbit, ®s->int_status); \ | |
1531 | handled = 1; \ | |
1532 | } | |
1533 | ||
7d12e780 | 1534 | static irqreturn_t goku_irq(int irq, void *_dev) |
1da177e4 LT |
1535 | { |
1536 | struct goku_udc *dev = _dev; | |
1537 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1538 | struct goku_ep *ep; | |
1539 | u32 stat, handled = 0; | |
1540 | unsigned i, rescans = 5; | |
1541 | ||
1542 | spin_lock(&dev->lock); | |
1543 | ||
1544 | rescan: | |
1545 | stat = readl(®s->int_status) & dev->int_enable; | |
1546 | if (!stat) | |
1547 | goto done; | |
1548 | dev->irqs++; | |
1549 | ||
1550 | /* device-wide irqs */ | |
1551 | if (unlikely(stat & INT_DEVWIDE)) { | |
1552 | if (stat & INT_SYSERROR) { | |
1553 | ERROR(dev, "system error\n"); | |
4fbc5566 | 1554 | stop_activity(dev); |
1da177e4 LT |
1555 | stat = 0; |
1556 | handled = 1; | |
1557 | // FIXME have a neater way to prevent re-enumeration | |
1558 | dev->driver = NULL; | |
1559 | goto done; | |
1560 | } | |
1561 | if (stat & INT_PWRDETECT) { | |
1562 | writel(~stat, ®s->int_status); | |
1563 | if (readl(&dev->regs->power_detect) & PW_DETECT) { | |
1564 | VDBG(dev, "connect\n"); | |
1565 | ep0_start(dev); | |
1566 | } else { | |
1567 | DBG(dev, "disconnect\n"); | |
1568 | if (dev->gadget.speed == USB_SPEED_FULL) | |
4fbc5566 | 1569 | stop_activity(dev); |
1da177e4 LT |
1570 | dev->ep0state = EP0_DISCONNECT; |
1571 | dev->int_enable = INT_DEVWIDE; | |
1572 | writel(dev->int_enable, &dev->regs->int_enable); | |
1573 | } | |
1574 | stat = 0; | |
1575 | handled = 1; | |
1576 | goto done; | |
1577 | } | |
1578 | if (stat & INT_SUSPEND) { | |
1579 | ACK(INT_SUSPEND); | |
1580 | if (readl(®s->ep_status[0]) & EPxSTATUS_SUSPEND) { | |
1581 | switch (dev->ep0state) { | |
1582 | case EP0_DISCONNECT: | |
1583 | case EP0_SUSPEND: | |
1584 | goto pm_next; | |
1585 | default: | |
1586 | break; | |
1587 | } | |
1588 | DBG(dev, "USB suspend\n"); | |
1589 | dev->ep0state = EP0_SUSPEND; | |
1590 | if (dev->gadget.speed != USB_SPEED_UNKNOWN | |
1591 | && dev->driver | |
1592 | && dev->driver->suspend) { | |
1593 | spin_unlock(&dev->lock); | |
1594 | dev->driver->suspend(&dev->gadget); | |
1595 | spin_lock(&dev->lock); | |
1596 | } | |
1597 | } else { | |
1598 | if (dev->ep0state != EP0_SUSPEND) { | |
1599 | DBG(dev, "bogus USB resume %d\n", | |
1600 | dev->ep0state); | |
1601 | goto pm_next; | |
1602 | } | |
1603 | DBG(dev, "USB resume\n"); | |
1604 | dev->ep0state = EP0_IDLE; | |
1605 | if (dev->gadget.speed != USB_SPEED_UNKNOWN | |
1606 | && dev->driver | |
1607 | && dev->driver->resume) { | |
1608 | spin_unlock(&dev->lock); | |
1609 | dev->driver->resume(&dev->gadget); | |
1610 | spin_lock(&dev->lock); | |
1611 | } | |
1612 | } | |
1613 | } | |
1614 | pm_next: | |
1615 | if (stat & INT_USBRESET) { /* hub reset done */ | |
1616 | ACK(INT_USBRESET); | |
1617 | INFO(dev, "USB reset done, gadget %s\n", | |
1618 | dev->driver->driver.name); | |
1619 | } | |
1620 | // and INT_ERR on some endpoint's crc/bitstuff/... problem | |
1621 | } | |
1622 | ||
1623 | /* progress ep0 setup, data, or status stages. | |
1624 | * no transition {EP0_STATUS, EP0_STALL} --> EP0_IDLE; saves irqs | |
1625 | */ | |
1626 | if (stat & INT_SETUP) { | |
1627 | ACK(INT_SETUP); | |
1628 | dev->ep[0].irqs++; | |
1629 | ep0_setup(dev); | |
1630 | } | |
1631 | if (stat & INT_STATUSNAK) { | |
1632 | ACK(INT_STATUSNAK|INT_ENDPOINT0); | |
1633 | if (dev->ep0state == EP0_IN) { | |
1634 | ep = &dev->ep[0]; | |
1635 | ep->irqs++; | |
1636 | nuke(ep, 0); | |
1637 | writel(~(1<<0), ®s->EOP); | |
1638 | dev->ep0state = EP0_STATUS; | |
1639 | } | |
1640 | } | |
1641 | if (stat & INT_ENDPOINT0) { | |
1642 | ACK(INT_ENDPOINT0); | |
1643 | ep = &dev->ep[0]; | |
1644 | ep->irqs++; | |
1645 | pio_advance(ep); | |
1646 | } | |
1647 | ||
1648 | /* dma completion */ | |
1649 | if (stat & INT_MSTRDEND) { /* IN */ | |
1650 | ACK(INT_MSTRDEND); | |
1651 | ep = &dev->ep[UDC_MSTRD_ENDPOINT]; | |
1652 | ep->irqs++; | |
1653 | dma_advance(dev, ep); | |
1654 | } | |
1655 | if (stat & INT_MSTWREND) { /* OUT */ | |
1656 | ACK(INT_MSTWREND); | |
1657 | ep = &dev->ep[UDC_MSTWR_ENDPOINT]; | |
1658 | ep->irqs++; | |
1659 | dma_advance(dev, ep); | |
1660 | } | |
1661 | if (stat & INT_MSTWRTMOUT) { /* OUT */ | |
1662 | ACK(INT_MSTWRTMOUT); | |
1663 | ep = &dev->ep[UDC_MSTWR_ENDPOINT]; | |
1664 | ep->irqs++; | |
1665 | ERROR(dev, "%s write timeout ?\n", ep->ep.name); | |
1666 | // reset dma? then dma_advance() | |
1667 | } | |
1668 | ||
1669 | /* pio */ | |
1670 | for (i = 1; i < 4; i++) { | |
1671 | u32 tmp = INT_EPxDATASET(i); | |
1672 | ||
1673 | if (!(stat & tmp)) | |
1674 | continue; | |
1675 | ep = &dev->ep[i]; | |
1676 | pio_advance(ep); | |
1677 | if (list_empty (&ep->queue)) | |
1678 | pio_irq_disable(dev, regs, i); | |
1679 | stat &= ~tmp; | |
1680 | handled = 1; | |
1681 | ep->irqs++; | |
1682 | } | |
1683 | ||
1684 | if (rescans--) | |
1685 | goto rescan; | |
1686 | ||
1687 | done: | |
1688 | (void)readl(®s->int_enable); | |
1689 | spin_unlock(&dev->lock); | |
1690 | if (stat) | |
1691 | DBG(dev, "unhandled irq status: %05x (%05x, %05x)\n", stat, | |
1692 | readl(®s->int_status), dev->int_enable); | |
1693 | return IRQ_RETVAL(handled); | |
1694 | } | |
1695 | ||
1696 | #undef ACK | |
1697 | ||
1698 | /*-------------------------------------------------------------------------*/ | |
1699 | ||
1700 | static void gadget_release(struct device *_dev) | |
1701 | { | |
1702 | struct goku_udc *dev = dev_get_drvdata(_dev); | |
1703 | ||
1704 | kfree(dev); | |
1705 | } | |
1706 | ||
1707 | /* tear down the binding between this driver and the pci device */ | |
1708 | ||
1709 | static void goku_remove(struct pci_dev *pdev) | |
1710 | { | |
1711 | struct goku_udc *dev = pci_get_drvdata(pdev); | |
1712 | ||
441b62c1 | 1713 | DBG(dev, "%s\n", __func__); |
6bea476c | 1714 | |
0f91349b SAS |
1715 | usb_del_gadget_udc(&dev->gadget); |
1716 | ||
6bea476c | 1717 | BUG_ON(dev->driver); |
1da177e4 LT |
1718 | |
1719 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
1720 | remove_proc_entry(proc_node_name, NULL); | |
1721 | #endif | |
1722 | if (dev->regs) | |
1723 | udc_reset(dev); | |
1724 | if (dev->got_irq) | |
1725 | free_irq(pdev->irq, dev); | |
1726 | if (dev->regs) | |
1727 | iounmap(dev->regs); | |
1728 | if (dev->got_region) | |
1729 | release_mem_region(pci_resource_start (pdev, 0), | |
1730 | pci_resource_len (pdev, 0)); | |
1731 | if (dev->enabled) | |
1732 | pci_disable_device(pdev); | |
1da177e4 | 1733 | |
1da177e4 | 1734 | dev->regs = NULL; |
1da177e4 LT |
1735 | |
1736 | INFO(dev, "unbind\n"); | |
1737 | } | |
1738 | ||
1739 | /* wrap this driver around the specified pci device, but | |
1740 | * don't respond over USB until a gadget driver binds to us. | |
1741 | */ | |
1742 | ||
1743 | static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id) | |
1744 | { | |
1745 | struct goku_udc *dev = NULL; | |
1746 | unsigned long resource, len; | |
1747 | void __iomem *base = NULL; | |
1748 | int retval; | |
1da177e4 | 1749 | |
1da177e4 LT |
1750 | if (!pdev->irq) { |
1751 | printk(KERN_ERR "Check PCI %s IRQ setup!\n", pci_name(pdev)); | |
1752 | retval = -ENODEV; | |
319feaab | 1753 | goto err; |
1da177e4 LT |
1754 | } |
1755 | ||
1756 | /* alloc, and start init */ | |
dd00cc48 | 1757 | dev = kzalloc (sizeof *dev, GFP_KERNEL); |
1a7c1d58 | 1758 | if (!dev) { |
1da177e4 | 1759 | retval = -ENOMEM; |
319feaab | 1760 | goto err; |
1da177e4 LT |
1761 | } |
1762 | ||
1da177e4 LT |
1763 | spin_lock_init(&dev->lock); |
1764 | dev->pdev = pdev; | |
1765 | dev->gadget.ops = &goku_ops; | |
d327ab5b | 1766 | dev->gadget.max_speed = USB_SPEED_FULL; |
1da177e4 LT |
1767 | |
1768 | /* the "gadget" abstracts/virtualizes the controller */ | |
1da177e4 LT |
1769 | dev->gadget.name = driver_name; |
1770 | ||
1771 | /* now all the pci goodies ... */ | |
1772 | retval = pci_enable_device(pdev); | |
1773 | if (retval < 0) { | |
1774 | DBG(dev, "can't enable, %d\n", retval); | |
319feaab | 1775 | goto err; |
1da177e4 LT |
1776 | } |
1777 | dev->enabled = 1; | |
1778 | ||
1779 | resource = pci_resource_start(pdev, 0); | |
1780 | len = pci_resource_len(pdev, 0); | |
1781 | if (!request_mem_region(resource, len, driver_name)) { | |
1782 | DBG(dev, "controller already in use\n"); | |
1783 | retval = -EBUSY; | |
319feaab | 1784 | goto err; |
1da177e4 LT |
1785 | } |
1786 | dev->got_region = 1; | |
1787 | ||
4bdc0d67 | 1788 | base = ioremap(resource, len); |
1da177e4 LT |
1789 | if (base == NULL) { |
1790 | DBG(dev, "can't map memory\n"); | |
1791 | retval = -EFAULT; | |
319feaab | 1792 | goto err; |
1da177e4 LT |
1793 | } |
1794 | dev->regs = (struct goku_udc_regs __iomem *) base; | |
1795 | ||
1796 | pci_set_drvdata(pdev, dev); | |
1797 | INFO(dev, "%s\n", driver_desc); | |
1798 | INFO(dev, "version: " DRIVER_VERSION " %s\n", dmastr()); | |
c6387a48 | 1799 | INFO(dev, "irq %d, pci mem %p\n", pdev->irq, base); |
1da177e4 LT |
1800 | |
1801 | /* init to known state, then setup irqs */ | |
1802 | udc_reset(dev); | |
1803 | udc_reinit (dev); | |
11bc2683 | 1804 | if (request_irq(pdev->irq, goku_irq, IRQF_SHARED, |
1da177e4 | 1805 | driver_name, dev) != 0) { |
c6387a48 | 1806 | DBG(dev, "request interrupt %d failed\n", pdev->irq); |
1da177e4 | 1807 | retval = -EBUSY; |
319feaab | 1808 | goto err; |
1da177e4 LT |
1809 | } |
1810 | dev->got_irq = 1; | |
1811 | if (use_dma) | |
1812 | pci_set_master(pdev); | |
1813 | ||
1814 | ||
1815 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
3f3942ac | 1816 | proc_create_single_data(proc_node_name, 0, NULL, udc_proc_read, dev); |
1da177e4 LT |
1817 | #endif |
1818 | ||
2ae837e4 FB |
1819 | retval = usb_add_gadget_udc_release(&pdev->dev, &dev->gadget, |
1820 | gadget_release); | |
0f91349b SAS |
1821 | if (retval) |
1822 | goto err; | |
1823 | ||
319feaab | 1824 | return 0; |
1da177e4 | 1825 | |
319feaab | 1826 | err: |
1da177e4 LT |
1827 | if (dev) |
1828 | goku_remove (pdev); | |
2a334cfa AK |
1829 | /* gadget_release is not registered yet, kfree explicitly */ |
1830 | kfree(dev); | |
1da177e4 LT |
1831 | return retval; |
1832 | } | |
1833 | ||
1834 | ||
1835 | /*-------------------------------------------------------------------------*/ | |
1836 | ||
1ba2557f | 1837 | static const struct pci_device_id pci_ids[] = { { |
7b78f48a | 1838 | .class = PCI_CLASS_SERIAL_USB_DEVICE, |
2d70c99b | 1839 | .class_mask = ~0, |
1da177e4 LT |
1840 | .vendor = 0x102f, /* Toshiba */ |
1841 | .device = 0x0107, /* this UDC */ | |
1842 | .subvendor = PCI_ANY_ID, | |
1843 | .subdevice = PCI_ANY_ID, | |
1844 | ||
1845 | }, { /* end: all zeroes */ } | |
1846 | }; | |
1847 | MODULE_DEVICE_TABLE (pci, pci_ids); | |
1848 | ||
1849 | static struct pci_driver goku_pci_driver = { | |
37a757e3 | 1850 | .name = driver_name, |
1da177e4 LT |
1851 | .id_table = pci_ids, |
1852 | ||
1853 | .probe = goku_probe, | |
1854 | .remove = goku_remove, | |
1855 | ||
1856 | /* FIXME add power management support */ | |
1857 | }; | |
1858 | ||
3cdb7721 | 1859 | module_pci_driver(goku_pci_driver); |