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1da177e4 LT |
1 | /* |
2 | * Toshiba TC86C001 ("Goku-S") USB Device Controller driver | |
3 | * | |
4 | * Copyright (C) 2000-2002 Lineo | |
5 | * by Stuart Lynne, Tom Rushworth, and Bruce Balden | |
6 | * Copyright (C) 2002 Toshiba Corporation | |
7 | * Copyright (C) 2003 MontaVista Software (source@mvista.com) | |
8 | * | |
9 | * This file is licensed under the terms of the GNU General Public | |
10 | * License version 2. This program is licensed "as is" without any | |
11 | * warranty of any kind, whether express or implied. | |
12 | */ | |
13 | ||
14 | /* | |
15 | * This device has ep0 and three semi-configurable bulk/interrupt endpoints. | |
16 | * | |
17 | * - Endpoint numbering is fixed: ep{1,2,3}-bulk | |
18 | * - Gadget drivers can choose ep maxpacket (8/16/32/64) | |
19 | * - Gadget drivers can choose direction (IN, OUT) | |
20 | * - DMA works with ep1 (OUT transfers) and ep2 (IN transfers). | |
21 | */ | |
22 | ||
1da177e4 LT |
23 | // #define VERBOSE /* extra debug messages (success too) */ |
24 | // #define USB_TRACE /* packet-level success messages */ | |
25 | ||
1da177e4 LT |
26 | #include <linux/kernel.h> |
27 | #include <linux/module.h> | |
28 | #include <linux/pci.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/ioport.h> | |
1da177e4 | 31 | #include <linux/slab.h> |
1da177e4 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; | |
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); | |
251 | if (!_ep || !ep->desc) | |
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 | req->req.dma = DMA_ADDR_INVALID; |
281 | INIT_LIST_HEAD(&req->queue); | |
282 | return &req->req; | |
283 | } | |
284 | ||
285 | static void | |
286 | goku_free_request(struct usb_ep *_ep, struct usb_request *_req) | |
287 | { | |
288 | struct goku_request *req; | |
289 | ||
290 | if (!_ep || !_req) | |
291 | return; | |
292 | ||
293 | req = container_of(_req, struct goku_request, req); | |
294 | WARN_ON(!list_empty(&req->queue)); | |
295 | kfree(req); | |
296 | } | |
297 | ||
298 | /*-------------------------------------------------------------------------*/ | |
299 | ||
1da177e4 LT |
300 | static void |
301 | done(struct goku_ep *ep, struct goku_request *req, int status) | |
302 | { | |
303 | struct goku_udc *dev; | |
304 | unsigned stopped = ep->stopped; | |
305 | ||
306 | list_del_init(&req->queue); | |
307 | ||
308 | if (likely(req->req.status == -EINPROGRESS)) | |
309 | req->req.status = status; | |
310 | else | |
311 | status = req->req.status; | |
312 | ||
313 | dev = ep->dev; | |
314 | if (req->mapped) { | |
315 | pci_unmap_single(dev->pdev, req->req.dma, req->req.length, | |
316 | ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); | |
317 | req->req.dma = DMA_ADDR_INVALID; | |
318 | req->mapped = 0; | |
319 | } | |
320 | ||
321 | #ifndef USB_TRACE | |
322 | if (status && status != -ESHUTDOWN) | |
323 | #endif | |
324 | VDBG(dev, "complete %s req %p stat %d len %u/%u\n", | |
325 | ep->ep.name, &req->req, status, | |
326 | req->req.actual, req->req.length); | |
327 | ||
328 | /* don't modify queue heads during completion callback */ | |
329 | ep->stopped = 1; | |
330 | spin_unlock(&dev->lock); | |
331 | req->req.complete(&ep->ep, &req->req); | |
332 | spin_lock(&dev->lock); | |
333 | ep->stopped = stopped; | |
334 | } | |
335 | ||
336 | /*-------------------------------------------------------------------------*/ | |
337 | ||
338 | static inline int | |
339 | write_packet(u32 __iomem *fifo, u8 *buf, struct goku_request *req, unsigned max) | |
340 | { | |
341 | unsigned length, count; | |
342 | ||
343 | length = min(req->req.length - req->req.actual, max); | |
344 | req->req.actual += length; | |
345 | ||
346 | count = length; | |
347 | while (likely(count--)) | |
348 | writel(*buf++, fifo); | |
349 | return length; | |
350 | } | |
351 | ||
352 | // return: 0 = still running, 1 = completed, negative = errno | |
353 | static int write_fifo(struct goku_ep *ep, struct goku_request *req) | |
354 | { | |
355 | struct goku_udc *dev = ep->dev; | |
356 | u32 tmp; | |
357 | u8 *buf; | |
358 | unsigned count; | |
359 | int is_last; | |
360 | ||
361 | tmp = readl(&dev->regs->DataSet); | |
362 | buf = req->req.buf + req->req.actual; | |
363 | prefetch(buf); | |
364 | ||
365 | dev = ep->dev; | |
366 | if (unlikely(ep->num == 0 && dev->ep0state != EP0_IN)) | |
367 | return -EL2HLT; | |
368 | ||
369 | /* NOTE: just single-buffered PIO-IN for now. */ | |
370 | if (unlikely((tmp & DATASET_A(ep->num)) != 0)) | |
371 | return 0; | |
372 | ||
373 | /* clear our "packet available" irq */ | |
374 | if (ep->num != 0) | |
375 | writel(~INT_EPxDATASET(ep->num), &dev->regs->int_status); | |
376 | ||
377 | count = write_packet(ep->reg_fifo, buf, req, ep->ep.maxpacket); | |
378 | ||
379 | /* last packet often short (sometimes a zlp, especially on ep0) */ | |
380 | if (unlikely(count != ep->ep.maxpacket)) { | |
381 | writel(~(1<<ep->num), &dev->regs->EOP); | |
382 | if (ep->num == 0) { | |
383 | dev->ep[0].stopped = 1; | |
384 | dev->ep0state = EP0_STATUS; | |
385 | } | |
386 | is_last = 1; | |
387 | } else { | |
388 | if (likely(req->req.length != req->req.actual) | |
389 | || req->req.zero) | |
390 | is_last = 0; | |
391 | else | |
392 | is_last = 1; | |
393 | } | |
394 | #if 0 /* printk seemed to trash is_last...*/ | |
395 | //#ifdef USB_TRACE | |
396 | VDBG(dev, "wrote %s %u bytes%s IN %u left %p\n", | |
397 | ep->ep.name, count, is_last ? "/last" : "", | |
398 | req->req.length - req->req.actual, req); | |
399 | #endif | |
400 | ||
401 | /* requests complete when all IN data is in the FIFO, | |
402 | * or sometimes later, if a zlp was needed. | |
403 | */ | |
404 | if (is_last) { | |
405 | done(ep, req, 0); | |
406 | return 1; | |
407 | } | |
408 | ||
409 | return 0; | |
410 | } | |
411 | ||
412 | static int read_fifo(struct goku_ep *ep, struct goku_request *req) | |
413 | { | |
414 | struct goku_udc_regs __iomem *regs; | |
415 | u32 size, set; | |
416 | u8 *buf; | |
417 | unsigned bufferspace, is_short, dbuff; | |
418 | ||
419 | regs = ep->dev->regs; | |
420 | top: | |
421 | buf = req->req.buf + req->req.actual; | |
422 | prefetchw(buf); | |
423 | ||
424 | if (unlikely(ep->num == 0 && ep->dev->ep0state != EP0_OUT)) | |
425 | return -EL2HLT; | |
426 | ||
427 | dbuff = (ep->num == 1 || ep->num == 2); | |
428 | do { | |
429 | /* ack dataset irq matching the status we'll handle */ | |
430 | if (ep->num != 0) | |
431 | writel(~INT_EPxDATASET(ep->num), ®s->int_status); | |
432 | ||
433 | set = readl(®s->DataSet) & DATASET_AB(ep->num); | |
434 | size = readl(®s->EPxSizeLA[ep->num]); | |
435 | bufferspace = req->req.length - req->req.actual; | |
436 | ||
437 | /* usually do nothing without an OUT packet */ | |
438 | if (likely(ep->num != 0 || bufferspace != 0)) { | |
439 | if (unlikely(set == 0)) | |
440 | break; | |
441 | /* use ep1/ep2 double-buffering for OUT */ | |
442 | if (!(size & PACKET_ACTIVE)) | |
443 | size = readl(®s->EPxSizeLB[ep->num]); | |
2d70c99b | 444 | if (!(size & PACKET_ACTIVE)) /* "can't happen" */ |
1da177e4 LT |
445 | break; |
446 | size &= DATASIZE; /* EPxSizeH == 0 */ | |
447 | ||
448 | /* ep0out no-out-data case for set_config, etc */ | |
449 | } else | |
450 | size = 0; | |
451 | ||
452 | /* read all bytes from this packet */ | |
453 | req->req.actual += size; | |
454 | is_short = (size < ep->ep.maxpacket); | |
455 | #ifdef USB_TRACE | |
456 | VDBG(ep->dev, "read %s %u bytes%s OUT req %p %u/%u\n", | |
457 | ep->ep.name, size, is_short ? "/S" : "", | |
458 | req, req->req.actual, req->req.length); | |
459 | #endif | |
460 | while (likely(size-- != 0)) { | |
461 | u8 byte = (u8) readl(ep->reg_fifo); | |
462 | ||
463 | if (unlikely(bufferspace == 0)) { | |
464 | /* this happens when the driver's buffer | |
465 | * is smaller than what the host sent. | |
466 | * discard the extra data in this packet. | |
467 | */ | |
468 | if (req->req.status != -EOVERFLOW) | |
469 | DBG(ep->dev, "%s overflow %u\n", | |
470 | ep->ep.name, size); | |
471 | req->req.status = -EOVERFLOW; | |
472 | } else { | |
473 | *buf++ = byte; | |
474 | bufferspace--; | |
475 | } | |
476 | } | |
477 | ||
478 | /* completion */ | |
479 | if (unlikely(is_short || req->req.actual == req->req.length)) { | |
480 | if (unlikely(ep->num == 0)) { | |
481 | /* non-control endpoints now usable? */ | |
482 | if (ep->dev->req_config) | |
483 | writel(ep->dev->configured | |
484 | ? USBSTATE_CONFIGURED | |
485 | : 0, | |
486 | ®s->UsbState); | |
487 | /* ep0out status stage */ | |
488 | writel(~(1<<0), ®s->EOP); | |
489 | ep->stopped = 1; | |
490 | ep->dev->ep0state = EP0_STATUS; | |
491 | } | |
492 | done(ep, req, 0); | |
493 | ||
494 | /* empty the second buffer asap */ | |
495 | if (dbuff && !list_empty(&ep->queue)) { | |
496 | req = list_entry(ep->queue.next, | |
497 | struct goku_request, queue); | |
498 | goto top; | |
499 | } | |
500 | return 1; | |
501 | } | |
502 | } while (dbuff); | |
503 | return 0; | |
504 | } | |
505 | ||
506 | static inline void | |
507 | pio_irq_enable(struct goku_udc *dev, | |
508 | struct goku_udc_regs __iomem *regs, int epnum) | |
509 | { | |
510 | dev->int_enable |= INT_EPxDATASET (epnum); | |
511 | writel(dev->int_enable, ®s->int_enable); | |
512 | /* write may still be posted */ | |
513 | } | |
514 | ||
515 | static inline void | |
516 | pio_irq_disable(struct goku_udc *dev, | |
517 | struct goku_udc_regs __iomem *regs, int epnum) | |
518 | { | |
519 | dev->int_enable &= ~INT_EPxDATASET (epnum); | |
520 | writel(dev->int_enable, ®s->int_enable); | |
521 | /* write may still be posted */ | |
522 | } | |
523 | ||
524 | static inline void | |
525 | pio_advance(struct goku_ep *ep) | |
526 | { | |
527 | struct goku_request *req; | |
528 | ||
529 | if (unlikely(list_empty (&ep->queue))) | |
530 | return; | |
531 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
532 | (ep->is_in ? write_fifo : read_fifo)(ep, req); | |
533 | } | |
534 | ||
535 | ||
536 | /*-------------------------------------------------------------------------*/ | |
537 | ||
538 | // return: 0 = q running, 1 = q stopped, negative = errno | |
539 | static int start_dma(struct goku_ep *ep, struct goku_request *req) | |
540 | { | |
541 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
542 | u32 master; | |
543 | u32 start = req->req.dma; | |
544 | u32 end = start + req->req.length - 1; | |
545 | ||
546 | master = readl(®s->dma_master) & MST_RW_BITS; | |
547 | ||
548 | /* re-init the bits affecting IN dma; careful with zlps */ | |
549 | if (likely(ep->is_in)) { | |
550 | if (unlikely(master & MST_RD_ENA)) { | |
551 | DBG (ep->dev, "start, IN active dma %03x!!\n", | |
552 | master); | |
553 | // return -EL2HLT; | |
554 | } | |
555 | writel(end, ®s->in_dma_end); | |
556 | writel(start, ®s->in_dma_start); | |
557 | ||
558 | master &= ~MST_R_BITS; | |
559 | if (unlikely(req->req.length == 0)) | |
560 | master = MST_RD_ENA | MST_RD_EOPB; | |
561 | else if ((req->req.length % ep->ep.maxpacket) != 0 | |
562 | || req->req.zero) | |
563 | master = MST_RD_ENA | MST_EOPB_ENA; | |
564 | else | |
565 | master = MST_RD_ENA | MST_EOPB_DIS; | |
566 | ||
567 | ep->dev->int_enable |= INT_MSTRDEND; | |
568 | ||
569 | /* Goku DMA-OUT merges short packets, which plays poorly with | |
570 | * protocols where short packets mark the transfer boundaries. | |
571 | * The chip supports a nonstandard policy with INT_MSTWRTMOUT, | |
572 | * ending transfers after 3 SOFs; we don't turn it on. | |
573 | */ | |
574 | } else { | |
575 | if (unlikely(master & MST_WR_ENA)) { | |
576 | DBG (ep->dev, "start, OUT active dma %03x!!\n", | |
577 | master); | |
578 | // return -EL2HLT; | |
579 | } | |
580 | writel(end, ®s->out_dma_end); | |
581 | writel(start, ®s->out_dma_start); | |
582 | ||
583 | master &= ~MST_W_BITS; | |
584 | master |= MST_WR_ENA | MST_TIMEOUT_DIS; | |
585 | ||
586 | ep->dev->int_enable |= INT_MSTWREND|INT_MSTWRTMOUT; | |
587 | } | |
588 | ||
589 | writel(master, ®s->dma_master); | |
590 | writel(ep->dev->int_enable, ®s->int_enable); | |
591 | return 0; | |
592 | } | |
593 | ||
594 | static void dma_advance(struct goku_udc *dev, struct goku_ep *ep) | |
595 | { | |
596 | struct goku_request *req; | |
597 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
598 | u32 master; | |
599 | ||
600 | master = readl(®s->dma_master); | |
601 | ||
602 | if (unlikely(list_empty(&ep->queue))) { | |
603 | stop: | |
604 | if (ep->is_in) | |
605 | dev->int_enable &= ~INT_MSTRDEND; | |
606 | else | |
607 | dev->int_enable &= ~(INT_MSTWREND|INT_MSTWRTMOUT); | |
608 | writel(dev->int_enable, ®s->int_enable); | |
609 | return; | |
610 | } | |
611 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
612 | ||
613 | /* normal hw dma completion (not abort) */ | |
614 | if (likely(ep->is_in)) { | |
615 | if (unlikely(master & MST_RD_ENA)) | |
616 | return; | |
617 | req->req.actual = readl(®s->in_dma_current); | |
618 | } else { | |
619 | if (unlikely(master & MST_WR_ENA)) | |
620 | return; | |
621 | ||
622 | /* hardware merges short packets, and also hides packet | |
623 | * overruns. a partial packet MAY be in the fifo here. | |
624 | */ | |
625 | req->req.actual = readl(®s->out_dma_current); | |
626 | } | |
627 | req->req.actual -= req->req.dma; | |
628 | req->req.actual++; | |
629 | ||
630 | #ifdef USB_TRACE | |
631 | VDBG(dev, "done %s %s dma, %u/%u bytes, req %p\n", | |
632 | ep->ep.name, ep->is_in ? "IN" : "OUT", | |
633 | req->req.actual, req->req.length, req); | |
634 | #endif | |
635 | done(ep, req, 0); | |
636 | if (list_empty(&ep->queue)) | |
637 | goto stop; | |
638 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
639 | (void) start_dma(ep, req); | |
640 | } | |
641 | ||
642 | static void abort_dma(struct goku_ep *ep, int status) | |
643 | { | |
644 | struct goku_udc_regs __iomem *regs = ep->dev->regs; | |
645 | struct goku_request *req; | |
646 | u32 curr, master; | |
647 | ||
648 | /* NAK future host requests, hoping the implicit delay lets the | |
649 | * dma engine finish reading (or writing) its latest packet and | |
650 | * empty the dma buffer (up to 16 bytes). | |
651 | * | |
652 | * This avoids needing to clean up a partial packet in the fifo; | |
653 | * we can't do that for IN without side effects to HALT and TOGGLE. | |
654 | */ | |
655 | command(regs, COMMAND_FIFO_DISABLE, ep->num); | |
656 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
657 | master = readl(®s->dma_master) & MST_RW_BITS; | |
658 | ||
659 | /* FIXME using these resets isn't usably documented. this may | |
660 | * not work unless it's followed by disabling the endpoint. | |
661 | * | |
662 | * FIXME the OUT reset path doesn't even behave consistently. | |
663 | */ | |
664 | if (ep->is_in) { | |
665 | if (unlikely((readl(®s->dma_master) & MST_RD_ENA) == 0)) | |
666 | goto finished; | |
667 | curr = readl(®s->in_dma_current); | |
668 | ||
669 | writel(curr, ®s->in_dma_end); | |
670 | writel(curr, ®s->in_dma_start); | |
671 | ||
672 | master &= ~MST_R_BITS; | |
673 | master |= MST_RD_RESET; | |
674 | writel(master, ®s->dma_master); | |
675 | ||
676 | if (readl(®s->dma_master) & MST_RD_ENA) | |
677 | DBG(ep->dev, "IN dma active after reset!\n"); | |
678 | ||
679 | } else { | |
680 | if (unlikely((readl(®s->dma_master) & MST_WR_ENA) == 0)) | |
681 | goto finished; | |
682 | curr = readl(®s->out_dma_current); | |
683 | ||
684 | writel(curr, ®s->out_dma_end); | |
685 | writel(curr, ®s->out_dma_start); | |
686 | ||
687 | master &= ~MST_W_BITS; | |
688 | master |= MST_WR_RESET; | |
689 | writel(master, ®s->dma_master); | |
690 | ||
691 | if (readl(®s->dma_master) & MST_WR_ENA) | |
692 | DBG(ep->dev, "OUT dma active after reset!\n"); | |
693 | } | |
694 | req->req.actual = (curr - req->req.dma) + 1; | |
695 | req->req.status = status; | |
696 | ||
441b62c1 | 697 | VDBG(ep->dev, "%s %s %s %d/%d\n", __func__, ep->ep.name, |
1da177e4 LT |
698 | ep->is_in ? "IN" : "OUT", |
699 | req->req.actual, req->req.length); | |
700 | ||
701 | command(regs, COMMAND_FIFO_ENABLE, ep->num); | |
702 | ||
703 | return; | |
704 | ||
705 | finished: | |
706 | /* dma already completed; no abort needed */ | |
707 | command(regs, COMMAND_FIFO_ENABLE, ep->num); | |
708 | req->req.actual = req->req.length; | |
709 | req->req.status = 0; | |
710 | } | |
711 | ||
712 | /*-------------------------------------------------------------------------*/ | |
713 | ||
714 | static int | |
55016f10 | 715 | goku_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) |
1da177e4 LT |
716 | { |
717 | struct goku_request *req; | |
718 | struct goku_ep *ep; | |
719 | struct goku_udc *dev; | |
720 | unsigned long flags; | |
721 | int status; | |
722 | ||
723 | /* always require a cpu-view buffer so pio works */ | |
724 | req = container_of(_req, struct goku_request, req); | |
725 | if (unlikely(!_req || !_req->complete | |
726 | || !_req->buf || !list_empty(&req->queue))) | |
727 | return -EINVAL; | |
728 | ep = container_of(_ep, struct goku_ep, ep); | |
729 | if (unlikely(!_ep || (!ep->desc && ep->num != 0))) | |
730 | return -EINVAL; | |
731 | dev = ep->dev; | |
732 | if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) | |
733 | return -ESHUTDOWN; | |
734 | ||
735 | /* can't touch registers when suspended */ | |
736 | if (dev->ep0state == EP0_SUSPEND) | |
737 | return -EBUSY; | |
738 | ||
739 | /* set up dma mapping in case the caller didn't */ | |
740 | if (ep->dma && _req->dma == DMA_ADDR_INVALID) { | |
741 | _req->dma = pci_map_single(dev->pdev, _req->buf, _req->length, | |
742 | ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); | |
743 | req->mapped = 1; | |
744 | } | |
745 | ||
746 | #ifdef USB_TRACE | |
747 | VDBG(dev, "%s queue req %p, len %u buf %p\n", | |
748 | _ep->name, _req, _req->length, _req->buf); | |
749 | #endif | |
750 | ||
751 | spin_lock_irqsave(&dev->lock, flags); | |
752 | ||
753 | _req->status = -EINPROGRESS; | |
754 | _req->actual = 0; | |
755 | ||
756 | /* for ep0 IN without premature status, zlp is required and | |
757 | * writing EOP starts the status stage (OUT). | |
758 | */ | |
759 | if (unlikely(ep->num == 0 && ep->is_in)) | |
760 | _req->zero = 1; | |
761 | ||
762 | /* kickstart this i/o queue? */ | |
763 | status = 0; | |
764 | if (list_empty(&ep->queue) && likely(!ep->stopped)) { | |
765 | /* dma: done after dma completion IRQ (or error) | |
766 | * pio: done after last fifo operation | |
767 | */ | |
768 | if (ep->dma) | |
769 | status = start_dma(ep, req); | |
770 | else | |
771 | status = (ep->is_in ? write_fifo : read_fifo)(ep, req); | |
772 | ||
773 | if (unlikely(status != 0)) { | |
774 | if (status > 0) | |
775 | status = 0; | |
776 | req = NULL; | |
777 | } | |
778 | ||
779 | } /* else pio or dma irq handler advances the queue. */ | |
780 | ||
781 | if (likely(req != 0)) | |
782 | list_add_tail(&req->queue, &ep->queue); | |
783 | ||
784 | if (likely(!list_empty(&ep->queue)) | |
785 | && likely(ep->num != 0) | |
786 | && !ep->dma | |
787 | && !(dev->int_enable & INT_EPxDATASET (ep->num))) | |
788 | pio_irq_enable(dev, dev->regs, ep->num); | |
789 | ||
790 | spin_unlock_irqrestore(&dev->lock, flags); | |
791 | ||
792 | /* pci writes may still be posted */ | |
793 | return status; | |
794 | } | |
795 | ||
796 | /* dequeue ALL requests */ | |
797 | static void nuke(struct goku_ep *ep, int status) | |
798 | { | |
799 | struct goku_request *req; | |
800 | ||
801 | ep->stopped = 1; | |
802 | if (list_empty(&ep->queue)) | |
803 | return; | |
804 | if (ep->dma) | |
805 | abort_dma(ep, status); | |
806 | while (!list_empty(&ep->queue)) { | |
807 | req = list_entry(ep->queue.next, struct goku_request, queue); | |
808 | done(ep, req, status); | |
809 | } | |
810 | } | |
811 | ||
812 | /* dequeue JUST ONE request */ | |
813 | static int goku_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
814 | { | |
815 | struct goku_request *req; | |
816 | struct goku_ep *ep; | |
817 | struct goku_udc *dev; | |
818 | unsigned long flags; | |
819 | ||
820 | ep = container_of(_ep, struct goku_ep, ep); | |
821 | if (!_ep || !_req || (!ep->desc && ep->num != 0)) | |
822 | return -EINVAL; | |
823 | dev = ep->dev; | |
824 | if (!dev->driver) | |
825 | return -ESHUTDOWN; | |
826 | ||
827 | /* we can't touch (dma) registers when suspended */ | |
828 | if (dev->ep0state == EP0_SUSPEND) | |
829 | return -EBUSY; | |
830 | ||
441b62c1 | 831 | VDBG(dev, "%s %s %s %s %p\n", __func__, _ep->name, |
1da177e4 LT |
832 | ep->is_in ? "IN" : "OUT", |
833 | ep->dma ? "dma" : "pio", | |
834 | _req); | |
835 | ||
836 | spin_lock_irqsave(&dev->lock, flags); | |
837 | ||
838 | /* make sure it's actually queued on this endpoint */ | |
839 | list_for_each_entry (req, &ep->queue, queue) { | |
840 | if (&req->req == _req) | |
841 | break; | |
842 | } | |
843 | if (&req->req != _req) { | |
844 | spin_unlock_irqrestore (&dev->lock, flags); | |
845 | return -EINVAL; | |
846 | } | |
847 | ||
848 | if (ep->dma && ep->queue.next == &req->queue && !ep->stopped) { | |
849 | abort_dma(ep, -ECONNRESET); | |
850 | done(ep, req, -ECONNRESET); | |
851 | dma_advance(dev, ep); | |
852 | } else if (!list_empty(&req->queue)) | |
853 | done(ep, req, -ECONNRESET); | |
854 | else | |
855 | req = NULL; | |
856 | spin_unlock_irqrestore(&dev->lock, flags); | |
857 | ||
858 | return req ? 0 : -EOPNOTSUPP; | |
859 | } | |
860 | ||
861 | /*-------------------------------------------------------------------------*/ | |
862 | ||
863 | static void goku_clear_halt(struct goku_ep *ep) | |
864 | { | |
865 | // assert (ep->num !=0) | |
866 | VDBG(ep->dev, "%s clear halt\n", ep->ep.name); | |
867 | command(ep->dev->regs, COMMAND_SETDATA0, ep->num); | |
868 | command(ep->dev->regs, COMMAND_STALL_CLEAR, ep->num); | |
869 | if (ep->stopped) { | |
870 | ep->stopped = 0; | |
871 | if (ep->dma) { | |
872 | struct goku_request *req; | |
873 | ||
874 | if (list_empty(&ep->queue)) | |
875 | return; | |
876 | req = list_entry(ep->queue.next, struct goku_request, | |
877 | queue); | |
878 | (void) start_dma(ep, req); | |
879 | } else | |
880 | pio_advance(ep); | |
881 | } | |
882 | } | |
883 | ||
884 | static int goku_set_halt(struct usb_ep *_ep, int value) | |
885 | { | |
886 | struct goku_ep *ep; | |
887 | unsigned long flags; | |
888 | int retval = 0; | |
889 | ||
890 | if (!_ep) | |
891 | return -ENODEV; | |
892 | ep = container_of (_ep, struct goku_ep, ep); | |
893 | ||
894 | if (ep->num == 0) { | |
895 | if (value) { | |
896 | ep->dev->ep0state = EP0_STALL; | |
897 | ep->dev->ep[0].stopped = 1; | |
898 | } else | |
899 | return -EINVAL; | |
900 | ||
901 | /* don't change EPxSTATUS_EP_INVALID to READY */ | |
902 | } else if (!ep->desc) { | |
441b62c1 | 903 | DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name); |
1da177e4 LT |
904 | return -EINVAL; |
905 | } | |
906 | ||
907 | spin_lock_irqsave(&ep->dev->lock, flags); | |
908 | if (!list_empty(&ep->queue)) | |
909 | retval = -EAGAIN; | |
910 | else if (ep->is_in && value | |
911 | /* data in (either) packet buffer? */ | |
912 | && (readl(&ep->dev->regs->DataSet) | |
913 | & DATASET_AB(ep->num))) | |
914 | retval = -EAGAIN; | |
915 | else if (!value) | |
916 | goku_clear_halt(ep); | |
917 | else { | |
918 | ep->stopped = 1; | |
919 | VDBG(ep->dev, "%s set halt\n", ep->ep.name); | |
920 | command(ep->dev->regs, COMMAND_STALL, ep->num); | |
921 | readl(ep->reg_status); | |
922 | } | |
923 | spin_unlock_irqrestore(&ep->dev->lock, flags); | |
924 | return retval; | |
925 | } | |
926 | ||
927 | static int goku_fifo_status(struct usb_ep *_ep) | |
928 | { | |
929 | struct goku_ep *ep; | |
930 | struct goku_udc_regs __iomem *regs; | |
931 | u32 size; | |
932 | ||
933 | if (!_ep) | |
934 | return -ENODEV; | |
935 | ep = container_of(_ep, struct goku_ep, ep); | |
936 | ||
937 | /* size is only reported sanely for OUT */ | |
938 | if (ep->is_in) | |
939 | return -EOPNOTSUPP; | |
940 | ||
941 | /* ignores 16-byte dma buffer; SizeH == 0 */ | |
942 | regs = ep->dev->regs; | |
943 | size = readl(®s->EPxSizeLA[ep->num]) & DATASIZE; | |
944 | size += readl(®s->EPxSizeLB[ep->num]) & DATASIZE; | |
441b62c1 | 945 | VDBG(ep->dev, "%s %s %u\n", __func__, ep->ep.name, size); |
1da177e4 LT |
946 | return size; |
947 | } | |
948 | ||
949 | static void goku_fifo_flush(struct usb_ep *_ep) | |
950 | { | |
951 | struct goku_ep *ep; | |
952 | struct goku_udc_regs __iomem *regs; | |
953 | u32 size; | |
954 | ||
955 | if (!_ep) | |
956 | return; | |
957 | ep = container_of(_ep, struct goku_ep, ep); | |
441b62c1 | 958 | VDBG(ep->dev, "%s %s\n", __func__, ep->ep.name); |
1da177e4 LT |
959 | |
960 | /* don't change EPxSTATUS_EP_INVALID to READY */ | |
961 | if (!ep->desc && ep->num != 0) { | |
441b62c1 | 962 | DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name); |
1da177e4 LT |
963 | return; |
964 | } | |
965 | ||
966 | regs = ep->dev->regs; | |
967 | size = readl(®s->EPxSizeLA[ep->num]); | |
968 | size &= DATASIZE; | |
969 | ||
970 | /* Non-desirable behavior: FIFO_CLEAR also clears the | |
971 | * endpoint halt feature. For OUT, we _could_ just read | |
972 | * the bytes out (PIO, if !ep->dma); for in, no choice. | |
973 | */ | |
974 | if (size) | |
975 | command(regs, COMMAND_FIFO_CLEAR, ep->num); | |
976 | } | |
977 | ||
978 | static struct usb_ep_ops goku_ep_ops = { | |
979 | .enable = goku_ep_enable, | |
980 | .disable = goku_ep_disable, | |
981 | ||
982 | .alloc_request = goku_alloc_request, | |
983 | .free_request = goku_free_request, | |
984 | ||
1da177e4 LT |
985 | .queue = goku_queue, |
986 | .dequeue = goku_dequeue, | |
987 | ||
988 | .set_halt = goku_set_halt, | |
989 | .fifo_status = goku_fifo_status, | |
990 | .fifo_flush = goku_fifo_flush, | |
991 | }; | |
992 | ||
993 | /*-------------------------------------------------------------------------*/ | |
994 | ||
995 | static int goku_get_frame(struct usb_gadget *_gadget) | |
996 | { | |
997 | return -EOPNOTSUPP; | |
998 | } | |
999 | ||
0f91349b SAS |
1000 | static int goku_start(struct usb_gadget_driver *driver, |
1001 | int (*bind)(struct usb_gadget *)); | |
1002 | static int goku_stop(struct usb_gadget_driver *driver); | |
1003 | ||
1da177e4 LT |
1004 | static const struct usb_gadget_ops goku_ops = { |
1005 | .get_frame = goku_get_frame, | |
0f91349b SAS |
1006 | .start = goku_start, |
1007 | .stop = goku_stop, | |
1da177e4 LT |
1008 | // no remote wakeup |
1009 | // not selfpowered | |
1010 | }; | |
1011 | ||
1012 | /*-------------------------------------------------------------------------*/ | |
1013 | ||
1014 | static inline char *dmastr(void) | |
1015 | { | |
1016 | if (use_dma == 0) | |
1017 | return "(dma disabled)"; | |
1018 | else if (use_dma == 2) | |
1019 | return "(dma IN and OUT)"; | |
1020 | else | |
1021 | return "(dma IN)"; | |
1022 | } | |
1023 | ||
1024 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
1025 | ||
1026 | static const char proc_node_name [] = "driver/udc"; | |
1027 | ||
1028 | #define FOURBITS "%s%s%s%s" | |
1029 | #define EIGHTBITS FOURBITS FOURBITS | |
1030 | ||
1031 | static void | |
1032 | dump_intmask(const char *label, u32 mask, char **next, unsigned *size) | |
1033 | { | |
1034 | int t; | |
1035 | ||
1036 | /* int_status is the same format ... */ | |
1037 | t = scnprintf(*next, *size, | |
1038 | "%s %05X =" FOURBITS EIGHTBITS EIGHTBITS "\n", | |
1039 | label, mask, | |
1040 | (mask & INT_PWRDETECT) ? " power" : "", | |
1041 | (mask & INT_SYSERROR) ? " sys" : "", | |
1042 | (mask & INT_MSTRDEND) ? " in-dma" : "", | |
1043 | (mask & INT_MSTWRTMOUT) ? " wrtmo" : "", | |
1044 | ||
1045 | (mask & INT_MSTWREND) ? " out-dma" : "", | |
1046 | (mask & INT_MSTWRSET) ? " wrset" : "", | |
1047 | (mask & INT_ERR) ? " err" : "", | |
1048 | (mask & INT_SOF) ? " sof" : "", | |
1049 | ||
1050 | (mask & INT_EP3NAK) ? " ep3nak" : "", | |
1051 | (mask & INT_EP2NAK) ? " ep2nak" : "", | |
1052 | (mask & INT_EP1NAK) ? " ep1nak" : "", | |
1053 | (mask & INT_EP3DATASET) ? " ep3" : "", | |
1054 | ||
1055 | (mask & INT_EP2DATASET) ? " ep2" : "", | |
1056 | (mask & INT_EP1DATASET) ? " ep1" : "", | |
1057 | (mask & INT_STATUSNAK) ? " ep0snak" : "", | |
1058 | (mask & INT_STATUS) ? " ep0status" : "", | |
1059 | ||
1060 | (mask & INT_SETUP) ? " setup" : "", | |
1061 | (mask & INT_ENDPOINT0) ? " ep0" : "", | |
1062 | (mask & INT_USBRESET) ? " reset" : "", | |
1063 | (mask & INT_SUSPEND) ? " suspend" : ""); | |
1064 | *size -= t; | |
1065 | *next += t; | |
1066 | } | |
1067 | ||
1068 | ||
1069 | static int | |
1070 | udc_proc_read(char *buffer, char **start, off_t off, int count, | |
1071 | int *eof, void *_dev) | |
1072 | { | |
1073 | char *buf = buffer; | |
1074 | struct goku_udc *dev = _dev; | |
1075 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1076 | char *next = buf; | |
1077 | unsigned size = count; | |
1078 | unsigned long flags; | |
1079 | int i, t, is_usb_connected; | |
1080 | u32 tmp; | |
1081 | ||
1082 | if (off != 0) | |
1083 | return 0; | |
1084 | ||
1085 | local_irq_save(flags); | |
1086 | ||
1087 | /* basic device status */ | |
1088 | tmp = readl(®s->power_detect); | |
1089 | is_usb_connected = tmp & PW_DETECT; | |
1090 | t = scnprintf(next, size, | |
1091 | "%s - %s\n" | |
1092 | "%s version: %s %s\n" | |
1093 | "Gadget driver: %s\n" | |
1094 | "Host %s, %s\n" | |
1095 | "\n", | |
1096 | pci_name(dev->pdev), driver_desc, | |
1097 | driver_name, DRIVER_VERSION, dmastr(), | |
1098 | dev->driver ? dev->driver->driver.name : "(none)", | |
1099 | is_usb_connected | |
1100 | ? ((tmp & PW_PULLUP) ? "full speed" : "powered") | |
1101 | : "disconnected", | |
2d70c99b | 1102 | ({char *state; |
1da177e4 | 1103 | switch(dev->ep0state){ |
2d70c99b DB |
1104 | case EP0_DISCONNECT: state = "ep0_disconnect"; break; |
1105 | case EP0_IDLE: state = "ep0_idle"; break; | |
1106 | case EP0_IN: state = "ep0_in"; break; | |
1107 | case EP0_OUT: state = "ep0_out"; break; | |
1108 | case EP0_STATUS: state = "ep0_status"; break; | |
1109 | case EP0_STALL: state = "ep0_stall"; break; | |
1110 | case EP0_SUSPEND: state = "ep0_suspend"; break; | |
1111 | default: state = "ep0_?"; break; | |
1112 | } state; }) | |
1da177e4 LT |
1113 | ); |
1114 | size -= t; | |
1115 | next += t; | |
1116 | ||
1117 | dump_intmask("int_status", readl(®s->int_status), &next, &size); | |
1118 | dump_intmask("int_enable", readl(®s->int_enable), &next, &size); | |
1119 | ||
1120 | if (!is_usb_connected || !dev->driver || (tmp & PW_PULLUP) == 0) | |
1121 | goto done; | |
1122 | ||
1123 | /* registers for (active) device and ep0 */ | |
1124 | t = scnprintf(next, size, "\nirqs %lu\ndataset %02x " | |
1125 | "single.bcs %02x.%02x state %x addr %u\n", | |
1126 | dev->irqs, readl(®s->DataSet), | |
1127 | readl(®s->EPxSingle), readl(®s->EPxBCS), | |
1128 | readl(®s->UsbState), | |
1129 | readl(®s->address)); | |
1130 | size -= t; | |
1131 | next += t; | |
1132 | ||
1133 | tmp = readl(®s->dma_master); | |
1134 | t = scnprintf(next, size, | |
1135 | "dma %03X =" EIGHTBITS "%s %s\n", tmp, | |
1136 | (tmp & MST_EOPB_DIS) ? " eopb-" : "", | |
1137 | (tmp & MST_EOPB_ENA) ? " eopb+" : "", | |
1138 | (tmp & MST_TIMEOUT_DIS) ? " tmo-" : "", | |
1139 | (tmp & MST_TIMEOUT_ENA) ? " tmo+" : "", | |
1140 | ||
1141 | (tmp & MST_RD_EOPB) ? " eopb" : "", | |
1142 | (tmp & MST_RD_RESET) ? " in_reset" : "", | |
1143 | (tmp & MST_WR_RESET) ? " out_reset" : "", | |
1144 | (tmp & MST_RD_ENA) ? " IN" : "", | |
1145 | ||
1146 | (tmp & MST_WR_ENA) ? " OUT" : "", | |
1147 | (tmp & MST_CONNECTION) | |
1148 | ? "ep1in/ep2out" | |
1149 | : "ep1out/ep2in"); | |
1150 | size -= t; | |
1151 | next += t; | |
1152 | ||
1153 | /* dump endpoint queues */ | |
1154 | for (i = 0; i < 4; i++) { | |
1155 | struct goku_ep *ep = &dev->ep [i]; | |
1156 | struct goku_request *req; | |
1da177e4 LT |
1157 | |
1158 | if (i && !ep->desc) | |
1159 | continue; | |
1160 | ||
1161 | tmp = readl(ep->reg_status); | |
1162 | t = scnprintf(next, size, | |
1163 | "%s %s max %u %s, irqs %lu, " | |
1164 | "status %02x (%s) " FOURBITS "\n", | |
1165 | ep->ep.name, | |
1166 | ep->is_in ? "in" : "out", | |
1167 | ep->ep.maxpacket, | |
1168 | ep->dma ? "dma" : "pio", | |
1169 | ep->irqs, | |
1170 | tmp, ({ char *s; | |
1171 | switch (tmp & EPxSTATUS_EP_MASK) { | |
1172 | case EPxSTATUS_EP_READY: | |
1173 | s = "ready"; break; | |
1174 | case EPxSTATUS_EP_DATAIN: | |
1175 | s = "packet"; break; | |
1176 | case EPxSTATUS_EP_FULL: | |
1177 | s = "full"; break; | |
1178 | case EPxSTATUS_EP_TX_ERR: // host will retry | |
1179 | s = "tx_err"; break; | |
1180 | case EPxSTATUS_EP_RX_ERR: | |
1181 | s = "rx_err"; break; | |
1182 | case EPxSTATUS_EP_BUSY: /* ep0 only */ | |
1183 | s = "busy"; break; | |
1184 | case EPxSTATUS_EP_STALL: | |
1185 | s = "stall"; break; | |
1186 | case EPxSTATUS_EP_INVALID: // these "can't happen" | |
1187 | s = "invalid"; break; | |
1188 | default: | |
1189 | s = "?"; break; | |
1190 | }; s; }), | |
1191 | (tmp & EPxSTATUS_TOGGLE) ? "data1" : "data0", | |
1192 | (tmp & EPxSTATUS_SUSPEND) ? " suspend" : "", | |
1193 | (tmp & EPxSTATUS_FIFO_DISABLE) ? " disable" : "", | |
1194 | (tmp & EPxSTATUS_STAGE_ERROR) ? " ep0stat" : "" | |
1195 | ); | |
1196 | if (t <= 0 || t > size) | |
1197 | goto done; | |
1198 | size -= t; | |
1199 | next += t; | |
1200 | ||
1201 | if (list_empty(&ep->queue)) { | |
1202 | t = scnprintf(next, size, "\t(nothing queued)\n"); | |
1203 | if (t <= 0 || t > size) | |
1204 | goto done; | |
1205 | size -= t; | |
1206 | next += t; | |
1207 | continue; | |
1208 | } | |
1209 | list_for_each_entry(req, &ep->queue, queue) { | |
1210 | if (ep->dma && req->queue.prev == &ep->queue) { | |
1211 | if (i == UDC_MSTRD_ENDPOINT) | |
1212 | tmp = readl(®s->in_dma_current); | |
1213 | else | |
1214 | tmp = readl(®s->out_dma_current); | |
1215 | tmp -= req->req.dma; | |
1216 | tmp++; | |
1217 | } else | |
1218 | tmp = req->req.actual; | |
1219 | ||
1220 | t = scnprintf(next, size, | |
1221 | "\treq %p len %u/%u buf %p\n", | |
1222 | &req->req, tmp, req->req.length, | |
1223 | req->req.buf); | |
1224 | if (t <= 0 || t > size) | |
1225 | goto done; | |
1226 | size -= t; | |
1227 | next += t; | |
1228 | } | |
1229 | } | |
1230 | ||
1231 | done: | |
1232 | local_irq_restore(flags); | |
1233 | *eof = 1; | |
1234 | return count - size; | |
1235 | } | |
1236 | ||
1237 | #endif /* CONFIG_USB_GADGET_DEBUG_FILES */ | |
1238 | ||
1239 | /*-------------------------------------------------------------------------*/ | |
1240 | ||
1241 | static void udc_reinit (struct goku_udc *dev) | |
1242 | { | |
1243 | static char *names [] = { "ep0", "ep1-bulk", "ep2-bulk", "ep3-bulk" }; | |
2d70c99b | 1244 | |
1da177e4 LT |
1245 | unsigned i; |
1246 | ||
1247 | INIT_LIST_HEAD (&dev->gadget.ep_list); | |
1248 | dev->gadget.ep0 = &dev->ep [0].ep; | |
1249 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
1250 | dev->ep0state = EP0_DISCONNECT; | |
1251 | dev->irqs = 0; | |
1252 | ||
1253 | for (i = 0; i < 4; i++) { | |
1254 | struct goku_ep *ep = &dev->ep[i]; | |
1255 | ||
1256 | ep->num = i; | |
1257 | ep->ep.name = names[i]; | |
1258 | ep->reg_fifo = &dev->regs->ep_fifo [i]; | |
1259 | ep->reg_status = &dev->regs->ep_status [i]; | |
1260 | ep->reg_mode = &dev->regs->ep_mode[i]; | |
1261 | ||
1262 | ep->ep.ops = &goku_ep_ops; | |
1263 | list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list); | |
1264 | ep->dev = dev; | |
1265 | INIT_LIST_HEAD (&ep->queue); | |
1266 | ||
1267 | ep_reset(NULL, ep); | |
1268 | } | |
1269 | ||
1270 | dev->ep[0].reg_mode = NULL; | |
1271 | dev->ep[0].ep.maxpacket = MAX_EP0_SIZE; | |
1272 | list_del_init (&dev->ep[0].ep.ep_list); | |
1273 | } | |
1274 | ||
1275 | static void udc_reset(struct goku_udc *dev) | |
1276 | { | |
1277 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1278 | ||
1279 | writel(0, ®s->power_detect); | |
1280 | writel(0, ®s->int_enable); | |
1281 | readl(®s->int_enable); | |
1282 | dev->int_enable = 0; | |
1283 | ||
1284 | /* deassert reset, leave USB D+ at hi-Z (no pullup) | |
1285 | * don't let INT_PWRDETECT sequence begin | |
1286 | */ | |
1287 | udelay(250); | |
1288 | writel(PW_RESETB, ®s->power_detect); | |
1289 | readl(®s->int_enable); | |
1290 | } | |
1291 | ||
1292 | static void ep0_start(struct goku_udc *dev) | |
1293 | { | |
1294 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1295 | unsigned i; | |
1296 | ||
441b62c1 | 1297 | VDBG(dev, "%s\n", __func__); |
1da177e4 LT |
1298 | |
1299 | udc_reset(dev); | |
1300 | udc_reinit (dev); | |
1301 | //writel(MST_EOPB_ENA | MST_TIMEOUT_ENA, ®s->dma_master); | |
1302 | ||
1303 | /* hw handles set_address, set_feature, get_status; maybe more */ | |
1304 | writel( G_REQMODE_SET_INTF | G_REQMODE_GET_INTF | |
1305 | | G_REQMODE_SET_CONF | G_REQMODE_GET_CONF | |
1306 | | G_REQMODE_GET_DESC | |
1307 | | G_REQMODE_CLEAR_FEAT | |
1308 | , ®s->reqmode); | |
1309 | ||
1310 | for (i = 0; i < 4; i++) | |
1311 | dev->ep[i].irqs = 0; | |
1312 | ||
1313 | /* can't modify descriptors after writing UsbReady */ | |
1314 | for (i = 0; i < DESC_LEN; i++) | |
1315 | writel(0, ®s->descriptors[i]); | |
1316 | writel(0, ®s->UsbReady); | |
1317 | ||
1318 | /* expect ep0 requests when the host drops reset */ | |
1319 | writel(PW_RESETB | PW_PULLUP, ®s->power_detect); | |
1320 | dev->int_enable = INT_DEVWIDE | INT_EP0; | |
1321 | writel(dev->int_enable, &dev->regs->int_enable); | |
1322 | readl(®s->int_enable); | |
1323 | dev->gadget.speed = USB_SPEED_FULL; | |
1324 | dev->ep0state = EP0_IDLE; | |
1325 | } | |
1326 | ||
1327 | static void udc_enable(struct goku_udc *dev) | |
1328 | { | |
1329 | /* start enumeration now, or after power detect irq */ | |
1330 | if (readl(&dev->regs->power_detect) & PW_DETECT) | |
1331 | ep0_start(dev); | |
1332 | else { | |
441b62c1 | 1333 | DBG(dev, "%s\n", __func__); |
1da177e4 LT |
1334 | dev->int_enable = INT_PWRDETECT; |
1335 | writel(dev->int_enable, &dev->regs->int_enable); | |
1336 | } | |
1337 | } | |
1338 | ||
1339 | /*-------------------------------------------------------------------------*/ | |
1340 | ||
1341 | /* keeping it simple: | |
1342 | * - one bus driver, initted first; | |
1343 | * - one function driver, initted second | |
1344 | */ | |
1345 | ||
1346 | static struct goku_udc *the_controller; | |
1347 | ||
1348 | /* when a driver is successfully registered, it will receive | |
1349 | * control requests including set_configuration(), which enables | |
1350 | * non-control requests. then usb traffic follows until a | |
1351 | * disconnect is reported. then a host may connect again, or | |
1352 | * the driver might get unbound. | |
1353 | */ | |
0f91349b | 1354 | static int goku_start(struct usb_gadget_driver *driver, |
b0fca50f | 1355 | int (*bind)(struct usb_gadget *)) |
1da177e4 LT |
1356 | { |
1357 | struct goku_udc *dev = the_controller; | |
1358 | int retval; | |
1359 | ||
1360 | if (!driver | |
7177aed4 | 1361 | || driver->max_speed < USB_SPEED_FULL |
b0fca50f | 1362 | || !bind |
1da177e4 LT |
1363 | || !driver->disconnect |
1364 | || !driver->setup) | |
1365 | return -EINVAL; | |
1366 | if (!dev) | |
1367 | return -ENODEV; | |
1368 | if (dev->driver) | |
1369 | return -EBUSY; | |
1370 | ||
1371 | /* hook up the driver */ | |
1372 | driver->driver.bus = NULL; | |
1373 | dev->driver = driver; | |
1374 | dev->gadget.dev.driver = &driver->driver; | |
b0fca50f | 1375 | retval = bind(&dev->gadget); |
1da177e4 LT |
1376 | if (retval) { |
1377 | DBG(dev, "bind to driver %s --> error %d\n", | |
1378 | driver->driver.name, retval); | |
1379 | dev->driver = NULL; | |
1380 | dev->gadget.dev.driver = NULL; | |
1381 | return retval; | |
1382 | } | |
1383 | ||
1384 | /* then enable host detection and ep0; and we're ready | |
1385 | * for set_configuration as well as eventual disconnect. | |
1386 | */ | |
1387 | udc_enable(dev); | |
1388 | ||
1389 | DBG(dev, "registered gadget driver '%s'\n", driver->driver.name); | |
1390 | return 0; | |
1391 | } | |
1da177e4 LT |
1392 | |
1393 | static void | |
1394 | stop_activity(struct goku_udc *dev, struct usb_gadget_driver *driver) | |
1395 | { | |
1396 | unsigned i; | |
1397 | ||
441b62c1 | 1398 | DBG (dev, "%s\n", __func__); |
1da177e4 LT |
1399 | |
1400 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1401 | driver = NULL; | |
1402 | ||
1403 | /* disconnect gadget driver after quiesceing hw and the driver */ | |
1404 | udc_reset (dev); | |
1405 | for (i = 0; i < 4; i++) | |
1406 | nuke(&dev->ep [i], -ESHUTDOWN); | |
1407 | if (driver) { | |
1408 | spin_unlock(&dev->lock); | |
1409 | driver->disconnect(&dev->gadget); | |
1410 | spin_lock(&dev->lock); | |
1411 | } | |
1412 | ||
1413 | if (dev->driver) | |
1414 | udc_enable(dev); | |
1415 | } | |
1416 | ||
0f91349b | 1417 | static int goku_stop(struct usb_gadget_driver *driver) |
1da177e4 LT |
1418 | { |
1419 | struct goku_udc *dev = the_controller; | |
1420 | unsigned long flags; | |
1421 | ||
1422 | if (!dev) | |
1423 | return -ENODEV; | |
6bea476c | 1424 | if (!driver || driver != dev->driver || !driver->unbind) |
1da177e4 LT |
1425 | return -EINVAL; |
1426 | ||
1427 | spin_lock_irqsave(&dev->lock, flags); | |
1428 | dev->driver = NULL; | |
1429 | stop_activity(dev, driver); | |
1430 | spin_unlock_irqrestore(&dev->lock, flags); | |
1431 | ||
1432 | driver->unbind(&dev->gadget); | |
eb0be47d | 1433 | dev->gadget.dev.driver = NULL; |
1da177e4 LT |
1434 | |
1435 | DBG(dev, "unregistered driver '%s'\n", driver->driver.name); | |
1436 | return 0; | |
1437 | } | |
1da177e4 LT |
1438 | |
1439 | /*-------------------------------------------------------------------------*/ | |
1440 | ||
1441 | static void ep0_setup(struct goku_udc *dev) | |
1442 | { | |
1443 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1444 | struct usb_ctrlrequest ctrl; | |
1445 | int tmp; | |
1446 | ||
1447 | /* read SETUP packet and enter DATA stage */ | |
1448 | ctrl.bRequestType = readl(®s->bRequestType); | |
1449 | ctrl.bRequest = readl(®s->bRequest); | |
988199fe DB |
1450 | ctrl.wValue = cpu_to_le16((readl(®s->wValueH) << 8) |
1451 | | readl(®s->wValueL)); | |
1452 | ctrl.wIndex = cpu_to_le16((readl(®s->wIndexH) << 8) | |
1453 | | readl(®s->wIndexL)); | |
1454 | ctrl.wLength = cpu_to_le16((readl(®s->wLengthH) << 8) | |
1455 | | readl(®s->wLengthL)); | |
1da177e4 LT |
1456 | writel(0, ®s->SetupRecv); |
1457 | ||
1458 | nuke(&dev->ep[0], 0); | |
1459 | dev->ep[0].stopped = 0; | |
1460 | if (likely(ctrl.bRequestType & USB_DIR_IN)) { | |
1461 | dev->ep[0].is_in = 1; | |
1462 | dev->ep0state = EP0_IN; | |
1463 | /* detect early status stages */ | |
1464 | writel(ICONTROL_STATUSNAK, &dev->regs->IntControl); | |
1465 | } else { | |
1466 | dev->ep[0].is_in = 0; | |
1467 | dev->ep0state = EP0_OUT; | |
1468 | ||
1469 | /* NOTE: CLEAR_FEATURE is done in software so that we can | |
1470 | * synchronize transfer restarts after bulk IN stalls. data | |
1471 | * won't even enter the fifo until the halt is cleared. | |
1472 | */ | |
1473 | switch (ctrl.bRequest) { | |
1474 | case USB_REQ_CLEAR_FEATURE: | |
1475 | switch (ctrl.bRequestType) { | |
1476 | case USB_RECIP_ENDPOINT: | |
988199fe | 1477 | tmp = le16_to_cpu(ctrl.wIndex) & 0x0f; |
1da177e4 LT |
1478 | /* active endpoint */ |
1479 | if (tmp > 3 || (!dev->ep[tmp].desc && tmp != 0)) | |
1480 | goto stall; | |
551509d2 | 1481 | if (ctrl.wIndex & cpu_to_le16( |
988199fe | 1482 | USB_DIR_IN)) { |
1da177e4 LT |
1483 | if (!dev->ep[tmp].is_in) |
1484 | goto stall; | |
1485 | } else { | |
1486 | if (dev->ep[tmp].is_in) | |
1487 | goto stall; | |
1488 | } | |
551509d2 | 1489 | if (ctrl.wValue != cpu_to_le16( |
988199fe | 1490 | USB_ENDPOINT_HALT)) |
1da177e4 LT |
1491 | goto stall; |
1492 | if (tmp) | |
1493 | goku_clear_halt(&dev->ep[tmp]); | |
1494 | succeed: | |
1495 | /* start ep0out status stage */ | |
1496 | writel(~(1<<0), ®s->EOP); | |
1497 | dev->ep[0].stopped = 1; | |
1498 | dev->ep0state = EP0_STATUS; | |
1499 | return; | |
1500 | case USB_RECIP_DEVICE: | |
1501 | /* device remote wakeup: always clear */ | |
551509d2 | 1502 | if (ctrl.wValue != cpu_to_le16(1)) |
1da177e4 LT |
1503 | goto stall; |
1504 | VDBG(dev, "clear dev remote wakeup\n"); | |
1505 | goto succeed; | |
1506 | case USB_RECIP_INTERFACE: | |
1507 | goto stall; | |
1508 | default: /* pass to gadget driver */ | |
1509 | break; | |
1510 | } | |
1511 | break; | |
1512 | default: | |
1513 | break; | |
1514 | } | |
1515 | } | |
1516 | ||
1517 | #ifdef USB_TRACE | |
1518 | VDBG(dev, "SETUP %02x.%02x v%04x i%04x l%04x\n", | |
1519 | ctrl.bRequestType, ctrl.bRequest, | |
988199fe DB |
1520 | le16_to_cpu(ctrl.wValue), le16_to_cpu(ctrl.wIndex), |
1521 | le16_to_cpu(ctrl.wLength)); | |
1da177e4 LT |
1522 | #endif |
1523 | ||
1524 | /* hw wants to know when we're configured (or not) */ | |
1525 | dev->req_config = (ctrl.bRequest == USB_REQ_SET_CONFIGURATION | |
1526 | && ctrl.bRequestType == USB_RECIP_DEVICE); | |
1527 | if (unlikely(dev->req_config)) | |
551509d2 | 1528 | dev->configured = (ctrl.wValue != cpu_to_le16(0)); |
1da177e4 LT |
1529 | |
1530 | /* delegate everything to the gadget driver. | |
1531 | * it may respond after this irq handler returns. | |
1532 | */ | |
1533 | spin_unlock (&dev->lock); | |
1534 | tmp = dev->driver->setup(&dev->gadget, &ctrl); | |
1535 | spin_lock (&dev->lock); | |
1536 | if (unlikely(tmp < 0)) { | |
1537 | stall: | |
1538 | #ifdef USB_TRACE | |
1539 | VDBG(dev, "req %02x.%02x protocol STALL; err %d\n", | |
1540 | ctrl.bRequestType, ctrl.bRequest, tmp); | |
1541 | #endif | |
1542 | command(regs, COMMAND_STALL, 0); | |
1543 | dev->ep[0].stopped = 1; | |
1544 | dev->ep0state = EP0_STALL; | |
1545 | } | |
1546 | ||
1547 | /* expect at least one data or status stage irq */ | |
1548 | } | |
1549 | ||
1550 | #define ACK(irqbit) { \ | |
1551 | stat &= ~irqbit; \ | |
1552 | writel(~irqbit, ®s->int_status); \ | |
1553 | handled = 1; \ | |
1554 | } | |
1555 | ||
7d12e780 | 1556 | static irqreturn_t goku_irq(int irq, void *_dev) |
1da177e4 LT |
1557 | { |
1558 | struct goku_udc *dev = _dev; | |
1559 | struct goku_udc_regs __iomem *regs = dev->regs; | |
1560 | struct goku_ep *ep; | |
1561 | u32 stat, handled = 0; | |
1562 | unsigned i, rescans = 5; | |
1563 | ||
1564 | spin_lock(&dev->lock); | |
1565 | ||
1566 | rescan: | |
1567 | stat = readl(®s->int_status) & dev->int_enable; | |
1568 | if (!stat) | |
1569 | goto done; | |
1570 | dev->irqs++; | |
1571 | ||
1572 | /* device-wide irqs */ | |
1573 | if (unlikely(stat & INT_DEVWIDE)) { | |
1574 | if (stat & INT_SYSERROR) { | |
1575 | ERROR(dev, "system error\n"); | |
1576 | stop_activity(dev, dev->driver); | |
1577 | stat = 0; | |
1578 | handled = 1; | |
1579 | // FIXME have a neater way to prevent re-enumeration | |
1580 | dev->driver = NULL; | |
1581 | goto done; | |
1582 | } | |
1583 | if (stat & INT_PWRDETECT) { | |
1584 | writel(~stat, ®s->int_status); | |
1585 | if (readl(&dev->regs->power_detect) & PW_DETECT) { | |
1586 | VDBG(dev, "connect\n"); | |
1587 | ep0_start(dev); | |
1588 | } else { | |
1589 | DBG(dev, "disconnect\n"); | |
1590 | if (dev->gadget.speed == USB_SPEED_FULL) | |
1591 | stop_activity(dev, dev->driver); | |
1592 | dev->ep0state = EP0_DISCONNECT; | |
1593 | dev->int_enable = INT_DEVWIDE; | |
1594 | writel(dev->int_enable, &dev->regs->int_enable); | |
1595 | } | |
1596 | stat = 0; | |
1597 | handled = 1; | |
1598 | goto done; | |
1599 | } | |
1600 | if (stat & INT_SUSPEND) { | |
1601 | ACK(INT_SUSPEND); | |
1602 | if (readl(®s->ep_status[0]) & EPxSTATUS_SUSPEND) { | |
1603 | switch (dev->ep0state) { | |
1604 | case EP0_DISCONNECT: | |
1605 | case EP0_SUSPEND: | |
1606 | goto pm_next; | |
1607 | default: | |
1608 | break; | |
1609 | } | |
1610 | DBG(dev, "USB suspend\n"); | |
1611 | dev->ep0state = EP0_SUSPEND; | |
1612 | if (dev->gadget.speed != USB_SPEED_UNKNOWN | |
1613 | && dev->driver | |
1614 | && dev->driver->suspend) { | |
1615 | spin_unlock(&dev->lock); | |
1616 | dev->driver->suspend(&dev->gadget); | |
1617 | spin_lock(&dev->lock); | |
1618 | } | |
1619 | } else { | |
1620 | if (dev->ep0state != EP0_SUSPEND) { | |
1621 | DBG(dev, "bogus USB resume %d\n", | |
1622 | dev->ep0state); | |
1623 | goto pm_next; | |
1624 | } | |
1625 | DBG(dev, "USB resume\n"); | |
1626 | dev->ep0state = EP0_IDLE; | |
1627 | if (dev->gadget.speed != USB_SPEED_UNKNOWN | |
1628 | && dev->driver | |
1629 | && dev->driver->resume) { | |
1630 | spin_unlock(&dev->lock); | |
1631 | dev->driver->resume(&dev->gadget); | |
1632 | spin_lock(&dev->lock); | |
1633 | } | |
1634 | } | |
1635 | } | |
1636 | pm_next: | |
1637 | if (stat & INT_USBRESET) { /* hub reset done */ | |
1638 | ACK(INT_USBRESET); | |
1639 | INFO(dev, "USB reset done, gadget %s\n", | |
1640 | dev->driver->driver.name); | |
1641 | } | |
1642 | // and INT_ERR on some endpoint's crc/bitstuff/... problem | |
1643 | } | |
1644 | ||
1645 | /* progress ep0 setup, data, or status stages. | |
1646 | * no transition {EP0_STATUS, EP0_STALL} --> EP0_IDLE; saves irqs | |
1647 | */ | |
1648 | if (stat & INT_SETUP) { | |
1649 | ACK(INT_SETUP); | |
1650 | dev->ep[0].irqs++; | |
1651 | ep0_setup(dev); | |
1652 | } | |
1653 | if (stat & INT_STATUSNAK) { | |
1654 | ACK(INT_STATUSNAK|INT_ENDPOINT0); | |
1655 | if (dev->ep0state == EP0_IN) { | |
1656 | ep = &dev->ep[0]; | |
1657 | ep->irqs++; | |
1658 | nuke(ep, 0); | |
1659 | writel(~(1<<0), ®s->EOP); | |
1660 | dev->ep0state = EP0_STATUS; | |
1661 | } | |
1662 | } | |
1663 | if (stat & INT_ENDPOINT0) { | |
1664 | ACK(INT_ENDPOINT0); | |
1665 | ep = &dev->ep[0]; | |
1666 | ep->irqs++; | |
1667 | pio_advance(ep); | |
1668 | } | |
1669 | ||
1670 | /* dma completion */ | |
1671 | if (stat & INT_MSTRDEND) { /* IN */ | |
1672 | ACK(INT_MSTRDEND); | |
1673 | ep = &dev->ep[UDC_MSTRD_ENDPOINT]; | |
1674 | ep->irqs++; | |
1675 | dma_advance(dev, ep); | |
1676 | } | |
1677 | if (stat & INT_MSTWREND) { /* OUT */ | |
1678 | ACK(INT_MSTWREND); | |
1679 | ep = &dev->ep[UDC_MSTWR_ENDPOINT]; | |
1680 | ep->irqs++; | |
1681 | dma_advance(dev, ep); | |
1682 | } | |
1683 | if (stat & INT_MSTWRTMOUT) { /* OUT */ | |
1684 | ACK(INT_MSTWRTMOUT); | |
1685 | ep = &dev->ep[UDC_MSTWR_ENDPOINT]; | |
1686 | ep->irqs++; | |
1687 | ERROR(dev, "%s write timeout ?\n", ep->ep.name); | |
1688 | // reset dma? then dma_advance() | |
1689 | } | |
1690 | ||
1691 | /* pio */ | |
1692 | for (i = 1; i < 4; i++) { | |
1693 | u32 tmp = INT_EPxDATASET(i); | |
1694 | ||
1695 | if (!(stat & tmp)) | |
1696 | continue; | |
1697 | ep = &dev->ep[i]; | |
1698 | pio_advance(ep); | |
1699 | if (list_empty (&ep->queue)) | |
1700 | pio_irq_disable(dev, regs, i); | |
1701 | stat &= ~tmp; | |
1702 | handled = 1; | |
1703 | ep->irqs++; | |
1704 | } | |
1705 | ||
1706 | if (rescans--) | |
1707 | goto rescan; | |
1708 | ||
1709 | done: | |
1710 | (void)readl(®s->int_enable); | |
1711 | spin_unlock(&dev->lock); | |
1712 | if (stat) | |
1713 | DBG(dev, "unhandled irq status: %05x (%05x, %05x)\n", stat, | |
1714 | readl(®s->int_status), dev->int_enable); | |
1715 | return IRQ_RETVAL(handled); | |
1716 | } | |
1717 | ||
1718 | #undef ACK | |
1719 | ||
1720 | /*-------------------------------------------------------------------------*/ | |
1721 | ||
1722 | static void gadget_release(struct device *_dev) | |
1723 | { | |
1724 | struct goku_udc *dev = dev_get_drvdata(_dev); | |
1725 | ||
1726 | kfree(dev); | |
1727 | } | |
1728 | ||
1729 | /* tear down the binding between this driver and the pci device */ | |
1730 | ||
1731 | static void goku_remove(struct pci_dev *pdev) | |
1732 | { | |
1733 | struct goku_udc *dev = pci_get_drvdata(pdev); | |
1734 | ||
441b62c1 | 1735 | DBG(dev, "%s\n", __func__); |
6bea476c | 1736 | |
0f91349b SAS |
1737 | usb_del_gadget_udc(&dev->gadget); |
1738 | ||
6bea476c | 1739 | BUG_ON(dev->driver); |
1da177e4 LT |
1740 | |
1741 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
1742 | remove_proc_entry(proc_node_name, NULL); | |
1743 | #endif | |
1744 | if (dev->regs) | |
1745 | udc_reset(dev); | |
1746 | if (dev->got_irq) | |
1747 | free_irq(pdev->irq, dev); | |
1748 | if (dev->regs) | |
1749 | iounmap(dev->regs); | |
1750 | if (dev->got_region) | |
1751 | release_mem_region(pci_resource_start (pdev, 0), | |
1752 | pci_resource_len (pdev, 0)); | |
1753 | if (dev->enabled) | |
1754 | pci_disable_device(pdev); | |
319feaab DC |
1755 | if (dev->registered) |
1756 | device_unregister(&dev->gadget.dev); | |
1da177e4 LT |
1757 | |
1758 | pci_set_drvdata(pdev, NULL); | |
1759 | dev->regs = NULL; | |
1760 | the_controller = NULL; | |
1761 | ||
1762 | INFO(dev, "unbind\n"); | |
1763 | } | |
1764 | ||
1765 | /* wrap this driver around the specified pci device, but | |
1766 | * don't respond over USB until a gadget driver binds to us. | |
1767 | */ | |
1768 | ||
1769 | static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id) | |
1770 | { | |
1771 | struct goku_udc *dev = NULL; | |
1772 | unsigned long resource, len; | |
1773 | void __iomem *base = NULL; | |
1774 | int retval; | |
1da177e4 LT |
1775 | |
1776 | /* if you want to support more than one controller in a system, | |
1777 | * usb_gadget_driver_{register,unregister}() must change. | |
1778 | */ | |
1779 | if (the_controller) { | |
872f8b42 | 1780 | pr_warning("ignoring %s\n", pci_name(pdev)); |
1da177e4 LT |
1781 | return -EBUSY; |
1782 | } | |
1783 | if (!pdev->irq) { | |
1784 | printk(KERN_ERR "Check PCI %s IRQ setup!\n", pci_name(pdev)); | |
1785 | retval = -ENODEV; | |
319feaab | 1786 | goto err; |
1da177e4 LT |
1787 | } |
1788 | ||
1789 | /* alloc, and start init */ | |
dd00cc48 | 1790 | dev = kzalloc (sizeof *dev, GFP_KERNEL); |
1da177e4 LT |
1791 | if (dev == NULL){ |
1792 | pr_debug("enomem %s\n", pci_name(pdev)); | |
1793 | retval = -ENOMEM; | |
319feaab | 1794 | goto err; |
1da177e4 LT |
1795 | } |
1796 | ||
1da177e4 LT |
1797 | spin_lock_init(&dev->lock); |
1798 | dev->pdev = pdev; | |
1799 | dev->gadget.ops = &goku_ops; | |
d327ab5b | 1800 | dev->gadget.max_speed = USB_SPEED_FULL; |
1da177e4 LT |
1801 | |
1802 | /* the "gadget" abstracts/virtualizes the controller */ | |
0031a06e | 1803 | dev_set_name(&dev->gadget.dev, "gadget"); |
1da177e4 LT |
1804 | dev->gadget.dev.parent = &pdev->dev; |
1805 | dev->gadget.dev.dma_mask = pdev->dev.dma_mask; | |
1806 | dev->gadget.dev.release = gadget_release; | |
1807 | dev->gadget.name = driver_name; | |
1808 | ||
1809 | /* now all the pci goodies ... */ | |
1810 | retval = pci_enable_device(pdev); | |
1811 | if (retval < 0) { | |
1812 | DBG(dev, "can't enable, %d\n", retval); | |
319feaab | 1813 | goto err; |
1da177e4 LT |
1814 | } |
1815 | dev->enabled = 1; | |
1816 | ||
1817 | resource = pci_resource_start(pdev, 0); | |
1818 | len = pci_resource_len(pdev, 0); | |
1819 | if (!request_mem_region(resource, len, driver_name)) { | |
1820 | DBG(dev, "controller already in use\n"); | |
1821 | retval = -EBUSY; | |
319feaab | 1822 | goto err; |
1da177e4 LT |
1823 | } |
1824 | dev->got_region = 1; | |
1825 | ||
1826 | base = ioremap_nocache(resource, len); | |
1827 | if (base == NULL) { | |
1828 | DBG(dev, "can't map memory\n"); | |
1829 | retval = -EFAULT; | |
319feaab | 1830 | goto err; |
1da177e4 LT |
1831 | } |
1832 | dev->regs = (struct goku_udc_regs __iomem *) base; | |
1833 | ||
1834 | pci_set_drvdata(pdev, dev); | |
1835 | INFO(dev, "%s\n", driver_desc); | |
1836 | INFO(dev, "version: " DRIVER_VERSION " %s\n", dmastr()); | |
c6387a48 | 1837 | INFO(dev, "irq %d, pci mem %p\n", pdev->irq, base); |
1da177e4 LT |
1838 | |
1839 | /* init to known state, then setup irqs */ | |
1840 | udc_reset(dev); | |
1841 | udc_reinit (dev); | |
d54b5caa | 1842 | if (request_irq(pdev->irq, goku_irq, IRQF_SHARED/*|IRQF_SAMPLE_RANDOM*/, |
1da177e4 | 1843 | driver_name, dev) != 0) { |
c6387a48 | 1844 | DBG(dev, "request interrupt %d failed\n", pdev->irq); |
1da177e4 | 1845 | retval = -EBUSY; |
319feaab | 1846 | goto err; |
1da177e4 LT |
1847 | } |
1848 | dev->got_irq = 1; | |
1849 | if (use_dma) | |
1850 | pci_set_master(pdev); | |
1851 | ||
1852 | ||
1853 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
1854 | create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev); | |
1855 | #endif | |
1856 | ||
1da177e4 | 1857 | the_controller = dev; |
2d70c99b | 1858 | retval = device_register(&dev->gadget.dev); |
319feaab DC |
1859 | if (retval) { |
1860 | put_device(&dev->gadget.dev); | |
1861 | goto err; | |
1862 | } | |
1863 | dev->registered = 1; | |
0f91349b SAS |
1864 | retval = usb_add_gadget_udc(&pdev->dev, &dev->gadget); |
1865 | if (retval) | |
1866 | goto err; | |
1867 | ||
319feaab | 1868 | return 0; |
1da177e4 | 1869 | |
319feaab | 1870 | err: |
1da177e4 LT |
1871 | if (dev) |
1872 | goku_remove (pdev); | |
1873 | return retval; | |
1874 | } | |
1875 | ||
1876 | ||
1877 | /*-------------------------------------------------------------------------*/ | |
1878 | ||
1ba2557f | 1879 | static const struct pci_device_id pci_ids[] = { { |
2d70c99b DB |
1880 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), |
1881 | .class_mask = ~0, | |
1da177e4 LT |
1882 | .vendor = 0x102f, /* Toshiba */ |
1883 | .device = 0x0107, /* this UDC */ | |
1884 | .subvendor = PCI_ANY_ID, | |
1885 | .subdevice = PCI_ANY_ID, | |
1886 | ||
1887 | }, { /* end: all zeroes */ } | |
1888 | }; | |
1889 | MODULE_DEVICE_TABLE (pci, pci_ids); | |
1890 | ||
1891 | static struct pci_driver goku_pci_driver = { | |
1892 | .name = (char *) driver_name, | |
1893 | .id_table = pci_ids, | |
1894 | ||
1895 | .probe = goku_probe, | |
1896 | .remove = goku_remove, | |
1897 | ||
1898 | /* FIXME add power management support */ | |
1899 | }; | |
1900 | ||
1901 | static int __init init (void) | |
1902 | { | |
1903 | return pci_register_driver (&goku_pci_driver); | |
1904 | } | |
1905 | module_init (init); | |
1906 | ||
1907 | static void __exit cleanup (void) | |
1908 | { | |
1909 | pci_unregister_driver (&goku_pci_driver); | |
1910 | } | |
1911 | module_exit (cleanup); |