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1da177e4 LT |
1 | /* |
2 | * linux/drivers/usb/gadget/pxa2xx_udc.c | |
91987693 | 3 | * Intel PXA25x and IXP4xx on-chip full speed USB device controllers |
1da177e4 LT |
4 | * |
5 | * Copyright (C) 2002 Intrinsyc, Inc. (Frank Becker) | |
6 | * Copyright (C) 2003 Robert Schwebel, Pengutronix | |
7 | * Copyright (C) 2003 Benedikt Spranger, Pengutronix | |
8 | * Copyright (C) 2003 David Brownell | |
9 | * Copyright (C) 2003 Joshua Wise | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
24 | * | |
25 | */ | |
26 | ||
27 | #undef DEBUG | |
28 | // #define VERBOSE DBG_VERBOSE | |
29 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/kernel.h> | |
32 | #include <linux/ioport.h> | |
33 | #include <linux/types.h> | |
1da177e4 LT |
34 | #include <linux/errno.h> |
35 | #include <linux/delay.h> | |
36 | #include <linux/sched.h> | |
37 | #include <linux/slab.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/timer.h> | |
40 | #include <linux/list.h> | |
41 | #include <linux/interrupt.h> | |
42 | #include <linux/proc_fs.h> | |
43 | #include <linux/mm.h> | |
d052d1be | 44 | #include <linux/platform_device.h> |
1da177e4 LT |
45 | #include <linux/dma-mapping.h> |
46 | ||
47 | #include <asm/byteorder.h> | |
48 | #include <asm/dma.h> | |
49 | #include <asm/io.h> | |
50 | #include <asm/irq.h> | |
51 | #include <asm/system.h> | |
52 | #include <asm/mach-types.h> | |
53 | #include <asm/unaligned.h> | |
54 | #include <asm/hardware.h> | |
44df45a0 | 55 | #ifdef CONFIG_ARCH_PXA |
1da177e4 | 56 | #include <asm/arch/pxa-regs.h> |
44df45a0 | 57 | #endif |
1da177e4 LT |
58 | |
59 | #include <linux/usb_ch9.h> | |
60 | #include <linux/usb_gadget.h> | |
61 | ||
bf7e8511 | 62 | #include <asm/arch/udc.h> |
1da177e4 LT |
63 | |
64 | ||
65 | /* | |
91987693 | 66 | * This driver handles the USB Device Controller (UDC) in Intel's PXA 25x |
1da177e4 LT |
67 | * series processors. The UDC for the IXP 4xx series is very similar. |
68 | * There are fifteen endpoints, in addition to ep0. | |
69 | * | |
70 | * Such controller drivers work with a gadget driver. The gadget driver | |
71 | * returns descriptors, implements configuration and data protocols used | |
72 | * by the host to interact with this device, and allocates endpoints to | |
73 | * the different protocol interfaces. The controller driver virtualizes | |
74 | * usb hardware so that the gadget drivers will be more portable. | |
75 | * | |
76 | * This UDC hardware wants to implement a bit too much USB protocol, so | |
77 | * it constrains the sorts of USB configuration change events that work. | |
78 | * The errata for these chips are misleading; some "fixed" bugs from | |
79 | * pxa250 a0/a1 b0/b1/b2 sure act like they're still there. | |
80 | */ | |
81 | ||
91987693 DB |
82 | #define DRIVER_VERSION "4-May-2005" |
83 | #define DRIVER_DESC "PXA 25x USB Device Controller driver" | |
1da177e4 LT |
84 | |
85 | ||
86 | static const char driver_name [] = "pxa2xx_udc"; | |
87 | ||
88 | static const char ep0name [] = "ep0"; | |
89 | ||
90 | ||
91 | // #define USE_DMA | |
92 | // #define USE_OUT_DMA | |
93 | // #define DISABLE_TEST_MODE | |
94 | ||
95 | #ifdef CONFIG_ARCH_IXP4XX | |
96 | #undef USE_DMA | |
97 | ||
98 | /* cpu-specific register addresses are compiled in to this code */ | |
99 | #ifdef CONFIG_ARCH_PXA | |
100 | #error "Can't configure both IXP and PXA" | |
101 | #endif | |
102 | ||
103 | #endif | |
104 | ||
105 | #include "pxa2xx_udc.h" | |
106 | ||
107 | ||
108 | #ifdef USE_DMA | |
109 | static int use_dma = 1; | |
110 | module_param(use_dma, bool, 0); | |
111 | MODULE_PARM_DESC (use_dma, "true to use dma"); | |
112 | ||
113 | static void dma_nodesc_handler (int dmach, void *_ep, struct pt_regs *r); | |
114 | static void kick_dma(struct pxa2xx_ep *ep, struct pxa2xx_request *req); | |
115 | ||
116 | #ifdef USE_OUT_DMA | |
117 | #define DMASTR " (dma support)" | |
118 | #else | |
119 | #define DMASTR " (dma in)" | |
120 | #endif | |
121 | ||
122 | #else /* !USE_DMA */ | |
123 | #define DMASTR " (pio only)" | |
124 | #undef USE_OUT_DMA | |
125 | #endif | |
126 | ||
127 | #ifdef CONFIG_USB_PXA2XX_SMALL | |
128 | #define SIZE_STR " (small)" | |
129 | #else | |
130 | #define SIZE_STR "" | |
131 | #endif | |
132 | ||
133 | #ifdef DISABLE_TEST_MODE | |
134 | /* (mode == 0) == no undocumented chip tweaks | |
135 | * (mode & 1) == double buffer bulk IN | |
136 | * (mode & 2) == double buffer bulk OUT | |
137 | * ... so mode = 3 (or 7, 15, etc) does it for both | |
138 | */ | |
139 | static ushort fifo_mode = 0; | |
140 | module_param(fifo_mode, ushort, 0); | |
141 | MODULE_PARM_DESC (fifo_mode, "pxa2xx udc fifo mode"); | |
142 | #endif | |
143 | ||
144 | /* --------------------------------------------------------------------------- | |
145 | * endpoint related parts of the api to the usb controller hardware, | |
146 | * used by gadget driver; and the inner talker-to-hardware core. | |
147 | * --------------------------------------------------------------------------- | |
148 | */ | |
149 | ||
150 | static void pxa2xx_ep_fifo_flush (struct usb_ep *ep); | |
151 | static void nuke (struct pxa2xx_ep *, int status); | |
152 | ||
153 | static void pio_irq_enable(int bEndpointAddress) | |
154 | { | |
155 | bEndpointAddress &= 0xf; | |
156 | if (bEndpointAddress < 8) | |
157 | UICR0 &= ~(1 << bEndpointAddress); | |
158 | else { | |
159 | bEndpointAddress -= 8; | |
160 | UICR1 &= ~(1 << bEndpointAddress); | |
161 | } | |
162 | } | |
163 | ||
164 | static void pio_irq_disable(int bEndpointAddress) | |
165 | { | |
166 | bEndpointAddress &= 0xf; | |
167 | if (bEndpointAddress < 8) | |
168 | UICR0 |= 1 << bEndpointAddress; | |
169 | else { | |
170 | bEndpointAddress -= 8; | |
171 | UICR1 |= 1 << bEndpointAddress; | |
172 | } | |
173 | } | |
174 | ||
175 | /* The UDCCR reg contains mask and interrupt status bits, | |
176 | * so using '|=' isn't safe as it may ack an interrupt. | |
177 | */ | |
178 | #define UDCCR_MASK_BITS (UDCCR_REM | UDCCR_SRM | UDCCR_UDE) | |
179 | ||
180 | static inline void udc_set_mask_UDCCR(int mask) | |
181 | { | |
182 | UDCCR = (UDCCR & UDCCR_MASK_BITS) | (mask & UDCCR_MASK_BITS); | |
183 | } | |
184 | ||
185 | static inline void udc_clear_mask_UDCCR(int mask) | |
186 | { | |
187 | UDCCR = (UDCCR & UDCCR_MASK_BITS) & ~(mask & UDCCR_MASK_BITS); | |
188 | } | |
189 | ||
190 | static inline void udc_ack_int_UDCCR(int mask) | |
191 | { | |
192 | /* udccr contains the bits we dont want to change */ | |
193 | __u32 udccr = UDCCR & UDCCR_MASK_BITS; | |
194 | ||
195 | UDCCR = udccr | (mask & ~UDCCR_MASK_BITS); | |
196 | } | |
197 | ||
198 | /* | |
199 | * endpoint enable/disable | |
200 | * | |
201 | * we need to verify the descriptors used to enable endpoints. since pxa2xx | |
202 | * endpoint configurations are fixed, and are pretty much always enabled, | |
203 | * there's not a lot to manage here. | |
204 | * | |
205 | * because pxa2xx can't selectively initialize bulk (or interrupt) endpoints, | |
206 | * (resetting endpoint halt and toggle), SET_INTERFACE is unusable except | |
207 | * for a single interface (with only the default altsetting) and for gadget | |
208 | * drivers that don't halt endpoints (not reset by set_interface). that also | |
209 | * means that if you use ISO, you must violate the USB spec rule that all | |
210 | * iso endpoints must be in non-default altsettings. | |
211 | */ | |
212 | static int pxa2xx_ep_enable (struct usb_ep *_ep, | |
213 | const struct usb_endpoint_descriptor *desc) | |
214 | { | |
215 | struct pxa2xx_ep *ep; | |
216 | struct pxa2xx_udc *dev; | |
217 | ||
218 | ep = container_of (_ep, struct pxa2xx_ep, ep); | |
219 | if (!_ep || !desc || ep->desc || _ep->name == ep0name | |
220 | || desc->bDescriptorType != USB_DT_ENDPOINT | |
221 | || ep->bEndpointAddress != desc->bEndpointAddress | |
222 | || ep->fifo_size < le16_to_cpu | |
223 | (desc->wMaxPacketSize)) { | |
224 | DMSG("%s, bad ep or descriptor\n", __FUNCTION__); | |
225 | return -EINVAL; | |
226 | } | |
227 | ||
228 | /* xfer types must match, except that interrupt ~= bulk */ | |
229 | if (ep->bmAttributes != desc->bmAttributes | |
230 | && ep->bmAttributes != USB_ENDPOINT_XFER_BULK | |
231 | && desc->bmAttributes != USB_ENDPOINT_XFER_INT) { | |
232 | DMSG("%s, %s type mismatch\n", __FUNCTION__, _ep->name); | |
233 | return -EINVAL; | |
234 | } | |
235 | ||
236 | /* hardware _could_ do smaller, but driver doesn't */ | |
237 | if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK | |
238 | && le16_to_cpu (desc->wMaxPacketSize) | |
239 | != BULK_FIFO_SIZE) | |
240 | || !desc->wMaxPacketSize) { | |
241 | DMSG("%s, bad %s maxpacket\n", __FUNCTION__, _ep->name); | |
242 | return -ERANGE; | |
243 | } | |
244 | ||
245 | dev = ep->dev; | |
246 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { | |
247 | DMSG("%s, bogus device state\n", __FUNCTION__); | |
248 | return -ESHUTDOWN; | |
249 | } | |
250 | ||
251 | ep->desc = desc; | |
252 | ep->dma = -1; | |
253 | ep->stopped = 0; | |
254 | ep->pio_irqs = ep->dma_irqs = 0; | |
255 | ep->ep.maxpacket = le16_to_cpu (desc->wMaxPacketSize); | |
256 | ||
257 | /* flush fifo (mostly for OUT buffers) */ | |
258 | pxa2xx_ep_fifo_flush (_ep); | |
259 | ||
260 | /* ... reset halt state too, if we could ... */ | |
261 | ||
262 | #ifdef USE_DMA | |
263 | /* for (some) bulk and ISO endpoints, try to get a DMA channel and | |
264 | * bind it to the endpoint. otherwise use PIO. | |
265 | */ | |
266 | switch (ep->bmAttributes) { | |
267 | case USB_ENDPOINT_XFER_ISOC: | |
268 | if (le16_to_cpu(desc->wMaxPacketSize) % 32) | |
269 | break; | |
270 | // fall through | |
271 | case USB_ENDPOINT_XFER_BULK: | |
272 | if (!use_dma || !ep->reg_drcmr) | |
273 | break; | |
274 | ep->dma = pxa_request_dma ((char *)_ep->name, | |
275 | (le16_to_cpu (desc->wMaxPacketSize) > 64) | |
276 | ? DMA_PRIO_MEDIUM /* some iso */ | |
277 | : DMA_PRIO_LOW, | |
278 | dma_nodesc_handler, ep); | |
279 | if (ep->dma >= 0) { | |
280 | *ep->reg_drcmr = DRCMR_MAPVLD | ep->dma; | |
281 | DMSG("%s using dma%d\n", _ep->name, ep->dma); | |
282 | } | |
283 | } | |
284 | #endif | |
285 | ||
286 | DBG(DBG_VERBOSE, "enabled %s\n", _ep->name); | |
287 | return 0; | |
288 | } | |
289 | ||
290 | static int pxa2xx_ep_disable (struct usb_ep *_ep) | |
291 | { | |
292 | struct pxa2xx_ep *ep; | |
91987693 | 293 | unsigned long flags; |
1da177e4 LT |
294 | |
295 | ep = container_of (_ep, struct pxa2xx_ep, ep); | |
296 | if (!_ep || !ep->desc) { | |
297 | DMSG("%s, %s not enabled\n", __FUNCTION__, | |
298 | _ep ? ep->ep.name : NULL); | |
299 | return -EINVAL; | |
300 | } | |
91987693 DB |
301 | local_irq_save(flags); |
302 | ||
1da177e4 LT |
303 | nuke (ep, -ESHUTDOWN); |
304 | ||
305 | #ifdef USE_DMA | |
306 | if (ep->dma >= 0) { | |
307 | *ep->reg_drcmr = 0; | |
308 | pxa_free_dma (ep->dma); | |
309 | ep->dma = -1; | |
310 | } | |
311 | #endif | |
312 | ||
313 | /* flush fifo (mostly for IN buffers) */ | |
314 | pxa2xx_ep_fifo_flush (_ep); | |
315 | ||
316 | ep->desc = NULL; | |
317 | ep->stopped = 1; | |
318 | ||
91987693 | 319 | local_irq_restore(flags); |
1da177e4 LT |
320 | DBG(DBG_VERBOSE, "%s disabled\n", _ep->name); |
321 | return 0; | |
322 | } | |
323 | ||
324 | /*-------------------------------------------------------------------------*/ | |
325 | ||
326 | /* for the pxa2xx, these can just wrap kmalloc/kfree. gadget drivers | |
327 | * must still pass correctly initialized endpoints, since other controller | |
328 | * drivers may care about how it's currently set up (dma issues etc). | |
329 | */ | |
330 | ||
331 | /* | |
332 | * pxa2xx_ep_alloc_request - allocate a request data structure | |
333 | */ | |
334 | static struct usb_request * | |
55016f10 | 335 | pxa2xx_ep_alloc_request (struct usb_ep *_ep, gfp_t gfp_flags) |
1da177e4 LT |
336 | { |
337 | struct pxa2xx_request *req; | |
338 | ||
7039f422 | 339 | req = kzalloc(sizeof(*req), gfp_flags); |
1da177e4 LT |
340 | if (!req) |
341 | return NULL; | |
342 | ||
1da177e4 LT |
343 | INIT_LIST_HEAD (&req->queue); |
344 | return &req->req; | |
345 | } | |
346 | ||
347 | ||
348 | /* | |
349 | * pxa2xx_ep_free_request - deallocate a request data structure | |
350 | */ | |
351 | static void | |
352 | pxa2xx_ep_free_request (struct usb_ep *_ep, struct usb_request *_req) | |
353 | { | |
354 | struct pxa2xx_request *req; | |
355 | ||
356 | req = container_of (_req, struct pxa2xx_request, req); | |
357 | WARN_ON (!list_empty (&req->queue)); | |
358 | kfree(req); | |
359 | } | |
360 | ||
361 | ||
362 | /* PXA cache needs flushing with DMA I/O (it's dma-incoherent), but there's | |
363 | * no device-affinity and the heap works perfectly well for i/o buffers. | |
364 | * It wastes much less memory than dma_alloc_coherent() would, and even | |
365 | * prevents cacheline (32 bytes wide) sharing problems. | |
366 | */ | |
367 | static void * | |
368 | pxa2xx_ep_alloc_buffer(struct usb_ep *_ep, unsigned bytes, | |
55016f10 | 369 | dma_addr_t *dma, gfp_t gfp_flags) |
1da177e4 LT |
370 | { |
371 | char *retval; | |
372 | ||
373 | retval = kmalloc (bytes, gfp_flags & ~(__GFP_DMA|__GFP_HIGHMEM)); | |
374 | if (retval) | |
375 | #ifdef USE_DMA | |
376 | *dma = virt_to_bus (retval); | |
377 | #else | |
378 | *dma = (dma_addr_t)~0; | |
379 | #endif | |
380 | return retval; | |
381 | } | |
382 | ||
383 | static void | |
384 | pxa2xx_ep_free_buffer(struct usb_ep *_ep, void *buf, dma_addr_t dma, | |
385 | unsigned bytes) | |
386 | { | |
387 | kfree (buf); | |
388 | } | |
389 | ||
390 | /*-------------------------------------------------------------------------*/ | |
391 | ||
392 | /* | |
393 | * done - retire a request; caller blocked irqs | |
394 | */ | |
395 | static void done(struct pxa2xx_ep *ep, struct pxa2xx_request *req, int status) | |
396 | { | |
397 | unsigned stopped = ep->stopped; | |
398 | ||
399 | list_del_init(&req->queue); | |
400 | ||
401 | if (likely (req->req.status == -EINPROGRESS)) | |
402 | req->req.status = status; | |
403 | else | |
404 | status = req->req.status; | |
405 | ||
406 | if (status && status != -ESHUTDOWN) | |
407 | DBG(DBG_VERBOSE, "complete %s req %p stat %d len %u/%u\n", | |
408 | ep->ep.name, &req->req, status, | |
409 | req->req.actual, req->req.length); | |
410 | ||
411 | /* don't modify queue heads during completion callback */ | |
412 | ep->stopped = 1; | |
413 | req->req.complete(&ep->ep, &req->req); | |
414 | ep->stopped = stopped; | |
415 | } | |
416 | ||
417 | ||
418 | static inline void ep0_idle (struct pxa2xx_udc *dev) | |
419 | { | |
420 | dev->ep0state = EP0_IDLE; | |
421 | } | |
422 | ||
423 | static int | |
63a4b52c | 424 | write_packet(volatile u32 *uddr, struct pxa2xx_request *req, unsigned max) |
1da177e4 LT |
425 | { |
426 | u8 *buf; | |
427 | unsigned length, count; | |
428 | ||
429 | buf = req->req.buf + req->req.actual; | |
430 | prefetch(buf); | |
431 | ||
432 | /* how big will this packet be? */ | |
433 | length = min(req->req.length - req->req.actual, max); | |
434 | req->req.actual += length; | |
435 | ||
436 | count = length; | |
437 | while (likely(count--)) | |
438 | *uddr = *buf++; | |
439 | ||
440 | return length; | |
441 | } | |
442 | ||
443 | /* | |
444 | * write to an IN endpoint fifo, as many packets as possible. | |
445 | * irqs will use this to write the rest later. | |
446 | * caller guarantees at least one packet buffer is ready (or a zlp). | |
447 | */ | |
448 | static int | |
449 | write_fifo (struct pxa2xx_ep *ep, struct pxa2xx_request *req) | |
450 | { | |
451 | unsigned max; | |
452 | ||
453 | max = le16_to_cpu(ep->desc->wMaxPacketSize); | |
454 | do { | |
455 | unsigned count; | |
456 | int is_last, is_short; | |
457 | ||
458 | count = write_packet(ep->reg_uddr, req, max); | |
459 | ||
460 | /* last packet is usually short (or a zlp) */ | |
461 | if (unlikely (count != max)) | |
462 | is_last = is_short = 1; | |
463 | else { | |
464 | if (likely(req->req.length != req->req.actual) | |
465 | || req->req.zero) | |
466 | is_last = 0; | |
467 | else | |
468 | is_last = 1; | |
469 | /* interrupt/iso maxpacket may not fill the fifo */ | |
470 | is_short = unlikely (max < ep->fifo_size); | |
471 | } | |
472 | ||
473 | DBG(DBG_VERY_NOISY, "wrote %s %d bytes%s%s %d left %p\n", | |
474 | ep->ep.name, count, | |
475 | is_last ? "/L" : "", is_short ? "/S" : "", | |
476 | req->req.length - req->req.actual, req); | |
477 | ||
478 | /* let loose that packet. maybe try writing another one, | |
479 | * double buffering might work. TSP, TPC, and TFS | |
480 | * bit values are the same for all normal IN endpoints. | |
481 | */ | |
482 | *ep->reg_udccs = UDCCS_BI_TPC; | |
483 | if (is_short) | |
484 | *ep->reg_udccs = UDCCS_BI_TSP; | |
485 | ||
486 | /* requests complete when all IN data is in the FIFO */ | |
487 | if (is_last) { | |
488 | done (ep, req, 0); | |
489 | if (list_empty(&ep->queue) || unlikely(ep->dma >= 0)) { | |
490 | pio_irq_disable (ep->bEndpointAddress); | |
491 | #ifdef USE_DMA | |
492 | /* unaligned data and zlps couldn't use dma */ | |
493 | if (unlikely(!list_empty(&ep->queue))) { | |
494 | req = list_entry(ep->queue.next, | |
495 | struct pxa2xx_request, queue); | |
496 | kick_dma(ep,req); | |
497 | return 0; | |
498 | } | |
499 | #endif | |
500 | } | |
501 | return 1; | |
502 | } | |
503 | ||
504 | // TODO experiment: how robust can fifo mode tweaking be? | |
505 | // double buffering is off in the default fifo mode, which | |
506 | // prevents TFS from being set here. | |
507 | ||
508 | } while (*ep->reg_udccs & UDCCS_BI_TFS); | |
509 | return 0; | |
510 | } | |
511 | ||
512 | /* caller asserts req->pending (ep0 irq status nyet cleared); starts | |
513 | * ep0 data stage. these chips want very simple state transitions. | |
514 | */ | |
515 | static inline | |
516 | void ep0start(struct pxa2xx_udc *dev, u32 flags, const char *tag) | |
517 | { | |
518 | UDCCS0 = flags|UDCCS0_SA|UDCCS0_OPR; | |
519 | USIR0 = USIR0_IR0; | |
520 | dev->req_pending = 0; | |
521 | DBG(DBG_VERY_NOISY, "%s %s, %02x/%02x\n", | |
522 | __FUNCTION__, tag, UDCCS0, flags); | |
523 | } | |
524 | ||
525 | static int | |
526 | write_ep0_fifo (struct pxa2xx_ep *ep, struct pxa2xx_request *req) | |
527 | { | |
528 | unsigned count; | |
529 | int is_short; | |
530 | ||
531 | count = write_packet(&UDDR0, req, EP0_FIFO_SIZE); | |
532 | ep->dev->stats.write.bytes += count; | |
533 | ||
534 | /* last packet "must be" short (or a zlp) */ | |
535 | is_short = (count != EP0_FIFO_SIZE); | |
536 | ||
537 | DBG(DBG_VERY_NOISY, "ep0in %d bytes %d left %p\n", count, | |
538 | req->req.length - req->req.actual, req); | |
539 | ||
540 | if (unlikely (is_short)) { | |
541 | if (ep->dev->req_pending) | |
542 | ep0start(ep->dev, UDCCS0_IPR, "short IN"); | |
543 | else | |
544 | UDCCS0 = UDCCS0_IPR; | |
545 | ||
546 | count = req->req.length; | |
547 | done (ep, req, 0); | |
548 | ep0_idle(ep->dev); | |
043ea18b | 549 | #ifndef CONFIG_ARCH_IXP4XX |
1da177e4 LT |
550 | #if 1 |
551 | /* This seems to get rid of lost status irqs in some cases: | |
552 | * host responds quickly, or next request involves config | |
553 | * change automagic, or should have been hidden, or ... | |
554 | * | |
555 | * FIXME get rid of all udelays possible... | |
556 | */ | |
557 | if (count >= EP0_FIFO_SIZE) { | |
558 | count = 100; | |
559 | do { | |
560 | if ((UDCCS0 & UDCCS0_OPR) != 0) { | |
561 | /* clear OPR, generate ack */ | |
562 | UDCCS0 = UDCCS0_OPR; | |
563 | break; | |
564 | } | |
565 | count--; | |
566 | udelay(1); | |
567 | } while (count); | |
568 | } | |
043ea18b | 569 | #endif |
1da177e4 LT |
570 | #endif |
571 | } else if (ep->dev->req_pending) | |
572 | ep0start(ep->dev, 0, "IN"); | |
573 | return is_short; | |
574 | } | |
575 | ||
576 | ||
577 | /* | |
578 | * read_fifo - unload packet(s) from the fifo we use for usb OUT | |
579 | * transfers and put them into the request. caller should have made | |
580 | * sure there's at least one packet ready. | |
581 | * | |
582 | * returns true if the request completed because of short packet or the | |
583 | * request buffer having filled (and maybe overran till end-of-packet). | |
584 | */ | |
585 | static int | |
586 | read_fifo (struct pxa2xx_ep *ep, struct pxa2xx_request *req) | |
587 | { | |
588 | for (;;) { | |
589 | u32 udccs; | |
590 | u8 *buf; | |
591 | unsigned bufferspace, count, is_short; | |
592 | ||
593 | /* make sure there's a packet in the FIFO. | |
594 | * UDCCS_{BO,IO}_RPC are all the same bit value. | |
595 | * UDCCS_{BO,IO}_RNE are all the same bit value. | |
596 | */ | |
597 | udccs = *ep->reg_udccs; | |
598 | if (unlikely ((udccs & UDCCS_BO_RPC) == 0)) | |
599 | break; | |
600 | buf = req->req.buf + req->req.actual; | |
601 | prefetchw(buf); | |
602 | bufferspace = req->req.length - req->req.actual; | |
603 | ||
604 | /* read all bytes from this packet */ | |
605 | if (likely (udccs & UDCCS_BO_RNE)) { | |
606 | count = 1 + (0x0ff & *ep->reg_ubcr); | |
607 | req->req.actual += min (count, bufferspace); | |
608 | } else /* zlp */ | |
609 | count = 0; | |
610 | is_short = (count < ep->ep.maxpacket); | |
611 | DBG(DBG_VERY_NOISY, "read %s %02x, %d bytes%s req %p %d/%d\n", | |
612 | ep->ep.name, udccs, count, | |
613 | is_short ? "/S" : "", | |
614 | req, req->req.actual, req->req.length); | |
615 | while (likely (count-- != 0)) { | |
616 | u8 byte = (u8) *ep->reg_uddr; | |
617 | ||
618 | if (unlikely (bufferspace == 0)) { | |
619 | /* this happens when the driver's buffer | |
620 | * is smaller than what the host sent. | |
621 | * discard the extra data. | |
622 | */ | |
623 | if (req->req.status != -EOVERFLOW) | |
624 | DMSG("%s overflow %d\n", | |
625 | ep->ep.name, count); | |
626 | req->req.status = -EOVERFLOW; | |
627 | } else { | |
628 | *buf++ = byte; | |
629 | bufferspace--; | |
630 | } | |
631 | } | |
632 | *ep->reg_udccs = UDCCS_BO_RPC; | |
633 | /* RPC/RSP/RNE could now reflect the other packet buffer */ | |
634 | ||
635 | /* iso is one request per packet */ | |
636 | if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) { | |
637 | if (udccs & UDCCS_IO_ROF) | |
638 | req->req.status = -EHOSTUNREACH; | |
639 | /* more like "is_done" */ | |
640 | is_short = 1; | |
641 | } | |
642 | ||
643 | /* completion */ | |
644 | if (is_short || req->req.actual == req->req.length) { | |
645 | done (ep, req, 0); | |
646 | if (list_empty(&ep->queue)) | |
647 | pio_irq_disable (ep->bEndpointAddress); | |
648 | return 1; | |
649 | } | |
650 | ||
651 | /* finished that packet. the next one may be waiting... */ | |
652 | } | |
653 | return 0; | |
654 | } | |
655 | ||
656 | /* | |
657 | * special ep0 version of the above. no UBCR0 or double buffering; status | |
658 | * handshaking is magic. most device protocols don't need control-OUT. | |
659 | * CDC vendor commands (and RNDIS), mass storage CB/CBI, and some other | |
660 | * protocols do use them. | |
661 | */ | |
662 | static int | |
663 | read_ep0_fifo (struct pxa2xx_ep *ep, struct pxa2xx_request *req) | |
664 | { | |
665 | u8 *buf, byte; | |
666 | unsigned bufferspace; | |
667 | ||
668 | buf = req->req.buf + req->req.actual; | |
669 | bufferspace = req->req.length - req->req.actual; | |
670 | ||
671 | while (UDCCS0 & UDCCS0_RNE) { | |
672 | byte = (u8) UDDR0; | |
673 | ||
674 | if (unlikely (bufferspace == 0)) { | |
675 | /* this happens when the driver's buffer | |
676 | * is smaller than what the host sent. | |
677 | * discard the extra data. | |
678 | */ | |
679 | if (req->req.status != -EOVERFLOW) | |
680 | DMSG("%s overflow\n", ep->ep.name); | |
681 | req->req.status = -EOVERFLOW; | |
682 | } else { | |
683 | *buf++ = byte; | |
684 | req->req.actual++; | |
685 | bufferspace--; | |
686 | } | |
687 | } | |
688 | ||
689 | UDCCS0 = UDCCS0_OPR | UDCCS0_IPR; | |
690 | ||
691 | /* completion */ | |
692 | if (req->req.actual >= req->req.length) | |
693 | return 1; | |
694 | ||
695 | /* finished that packet. the next one may be waiting... */ | |
696 | return 0; | |
697 | } | |
698 | ||
699 | #ifdef USE_DMA | |
700 | ||
701 | #define MAX_IN_DMA ((DCMD_LENGTH + 1) - BULK_FIFO_SIZE) | |
702 | ||
703 | static void | |
704 | start_dma_nodesc(struct pxa2xx_ep *ep, struct pxa2xx_request *req, int is_in) | |
705 | { | |
706 | u32 dcmd = req->req.length; | |
707 | u32 buf = req->req.dma; | |
708 | u32 fifo = io_v2p ((u32)ep->reg_uddr); | |
709 | ||
710 | /* caller guarantees there's a packet or more remaining | |
711 | * - IN may end with a short packet (TSP set separately), | |
712 | * - OUT is always full length | |
713 | */ | |
714 | buf += req->req.actual; | |
715 | dcmd -= req->req.actual; | |
716 | ep->dma_fixup = 0; | |
717 | ||
718 | /* no-descriptor mode can be simple for bulk-in, iso-in, iso-out */ | |
719 | DCSR(ep->dma) = DCSR_NODESC; | |
720 | if (is_in) { | |
721 | DSADR(ep->dma) = buf; | |
722 | DTADR(ep->dma) = fifo; | |
723 | if (dcmd > MAX_IN_DMA) | |
724 | dcmd = MAX_IN_DMA; | |
725 | else | |
726 | ep->dma_fixup = (dcmd % ep->ep.maxpacket) != 0; | |
727 | dcmd |= DCMD_BURST32 | DCMD_WIDTH1 | |
728 | | DCMD_FLOWTRG | DCMD_INCSRCADDR; | |
729 | } else { | |
730 | #ifdef USE_OUT_DMA | |
731 | DSADR(ep->dma) = fifo; | |
732 | DTADR(ep->dma) = buf; | |
733 | if (ep->bmAttributes != USB_ENDPOINT_XFER_ISOC) | |
734 | dcmd = ep->ep.maxpacket; | |
735 | dcmd |= DCMD_BURST32 | DCMD_WIDTH1 | |
736 | | DCMD_FLOWSRC | DCMD_INCTRGADDR; | |
737 | #endif | |
738 | } | |
739 | DCMD(ep->dma) = dcmd; | |
740 | DCSR(ep->dma) = DCSR_RUN | DCSR_NODESC | |
741 | | (unlikely(is_in) | |
742 | ? DCSR_STOPIRQEN /* use dma_nodesc_handler() */ | |
743 | : 0); /* use handle_ep() */ | |
744 | } | |
745 | ||
746 | static void kick_dma(struct pxa2xx_ep *ep, struct pxa2xx_request *req) | |
747 | { | |
748 | int is_in = ep->bEndpointAddress & USB_DIR_IN; | |
749 | ||
750 | if (is_in) { | |
751 | /* unaligned tx buffers and zlps only work with PIO */ | |
752 | if ((req->req.dma & 0x0f) != 0 | |
753 | || unlikely((req->req.length - req->req.actual) | |
754 | == 0)) { | |
755 | pio_irq_enable(ep->bEndpointAddress); | |
756 | if ((*ep->reg_udccs & UDCCS_BI_TFS) != 0) | |
757 | (void) write_fifo(ep, req); | |
758 | } else { | |
759 | start_dma_nodesc(ep, req, USB_DIR_IN); | |
760 | } | |
761 | } else { | |
762 | if ((req->req.length - req->req.actual) < ep->ep.maxpacket) { | |
763 | DMSG("%s short dma read...\n", ep->ep.name); | |
764 | /* we're always set up for pio out */ | |
765 | read_fifo (ep, req); | |
766 | } else { | |
767 | *ep->reg_udccs = UDCCS_BO_DME | |
768 | | (*ep->reg_udccs & UDCCS_BO_FST); | |
769 | start_dma_nodesc(ep, req, USB_DIR_OUT); | |
770 | } | |
771 | } | |
772 | } | |
773 | ||
774 | static void cancel_dma(struct pxa2xx_ep *ep) | |
775 | { | |
776 | struct pxa2xx_request *req; | |
777 | u32 tmp; | |
778 | ||
779 | if (DCSR(ep->dma) == 0 || list_empty(&ep->queue)) | |
780 | return; | |
781 | ||
782 | DCSR(ep->dma) = 0; | |
783 | while ((DCSR(ep->dma) & DCSR_STOPSTATE) == 0) | |
784 | cpu_relax(); | |
785 | ||
786 | req = list_entry(ep->queue.next, struct pxa2xx_request, queue); | |
787 | tmp = DCMD(ep->dma) & DCMD_LENGTH; | |
788 | req->req.actual = req->req.length - (tmp & DCMD_LENGTH); | |
789 | ||
790 | /* the last tx packet may be incomplete, so flush the fifo. | |
791 | * FIXME correct req.actual if we can | |
792 | */ | |
793 | if (ep->bEndpointAddress & USB_DIR_IN) | |
794 | *ep->reg_udccs = UDCCS_BI_FTF; | |
795 | } | |
796 | ||
797 | /* dma channel stopped ... normal tx end (IN), or on error (IN/OUT) */ | |
798 | static void dma_nodesc_handler(int dmach, void *_ep, struct pt_regs *r) | |
799 | { | |
800 | struct pxa2xx_ep *ep = _ep; | |
801 | struct pxa2xx_request *req; | |
802 | u32 tmp, completed; | |
803 | ||
804 | local_irq_disable(); | |
805 | ||
806 | req = list_entry(ep->queue.next, struct pxa2xx_request, queue); | |
807 | ||
808 | ep->dma_irqs++; | |
809 | ep->dev->stats.irqs++; | |
810 | HEX_DISPLAY(ep->dev->stats.irqs); | |
811 | ||
812 | /* ack/clear */ | |
813 | tmp = DCSR(ep->dma); | |
814 | DCSR(ep->dma) = tmp; | |
815 | if ((tmp & DCSR_STOPSTATE) == 0 | |
816 | || (DDADR(ep->dma) & DDADR_STOP) != 0) { | |
817 | DBG(DBG_VERBOSE, "%s, dcsr %08x ddadr %08x\n", | |
818 | ep->ep.name, DCSR(ep->dma), DDADR(ep->dma)); | |
819 | goto done; | |
820 | } | |
821 | DCSR(ep->dma) = 0; /* clear DCSR_STOPSTATE */ | |
822 | ||
823 | /* update transfer status */ | |
824 | completed = tmp & DCSR_BUSERR; | |
825 | if (ep->bEndpointAddress & USB_DIR_IN) | |
826 | tmp = DSADR(ep->dma); | |
827 | else | |
828 | tmp = DTADR(ep->dma); | |
829 | req->req.actual = tmp - req->req.dma; | |
830 | ||
831 | /* FIXME seems we sometimes see partial transfers... */ | |
832 | ||
833 | if (unlikely(completed != 0)) | |
834 | req->req.status = -EIO; | |
835 | else if (req->req.actual) { | |
836 | /* these registers have zeroes in low bits; they miscount | |
837 | * some (end-of-transfer) short packets: tx 14 as tx 12 | |
838 | */ | |
839 | if (ep->dma_fixup) | |
840 | req->req.actual = min(req->req.actual + 3, | |
841 | req->req.length); | |
842 | ||
843 | tmp = (req->req.length - req->req.actual); | |
844 | completed = (tmp == 0); | |
845 | if (completed && (ep->bEndpointAddress & USB_DIR_IN)) { | |
846 | ||
847 | /* maybe validate final short packet ... */ | |
848 | if ((req->req.actual % ep->ep.maxpacket) != 0) | |
849 | *ep->reg_udccs = UDCCS_BI_TSP/*|UDCCS_BI_TPC*/; | |
850 | ||
851 | /* ... or zlp, using pio fallback */ | |
852 | else if (ep->bmAttributes == USB_ENDPOINT_XFER_BULK | |
853 | && req->req.zero) { | |
854 | DMSG("%s zlp terminate ...\n", ep->ep.name); | |
855 | completed = 0; | |
856 | } | |
857 | } | |
858 | } | |
859 | ||
860 | if (likely(completed)) { | |
861 | done(ep, req, 0); | |
862 | ||
863 | /* maybe re-activate after completion */ | |
864 | if (ep->stopped || list_empty(&ep->queue)) | |
865 | goto done; | |
866 | req = list_entry(ep->queue.next, struct pxa2xx_request, queue); | |
867 | } | |
868 | kick_dma(ep, req); | |
869 | done: | |
870 | local_irq_enable(); | |
871 | } | |
872 | ||
873 | #endif | |
874 | ||
875 | /*-------------------------------------------------------------------------*/ | |
876 | ||
877 | static int | |
55016f10 | 878 | pxa2xx_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) |
1da177e4 LT |
879 | { |
880 | struct pxa2xx_request *req; | |
881 | struct pxa2xx_ep *ep; | |
882 | struct pxa2xx_udc *dev; | |
883 | unsigned long flags; | |
884 | ||
885 | req = container_of(_req, struct pxa2xx_request, req); | |
886 | if (unlikely (!_req || !_req->complete || !_req->buf | |
887 | || !list_empty(&req->queue))) { | |
888 | DMSG("%s, bad params\n", __FUNCTION__); | |
889 | return -EINVAL; | |
890 | } | |
891 | ||
892 | ep = container_of(_ep, struct pxa2xx_ep, ep); | |
893 | if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) { | |
894 | DMSG("%s, bad ep\n", __FUNCTION__); | |
895 | return -EINVAL; | |
896 | } | |
897 | ||
898 | dev = ep->dev; | |
899 | if (unlikely (!dev->driver | |
900 | || dev->gadget.speed == USB_SPEED_UNKNOWN)) { | |
901 | DMSG("%s, bogus device state\n", __FUNCTION__); | |
902 | return -ESHUTDOWN; | |
903 | } | |
904 | ||
905 | /* iso is always one packet per request, that's the only way | |
906 | * we can report per-packet status. that also helps with dma. | |
907 | */ | |
908 | if (unlikely (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC | |
909 | && req->req.length > le16_to_cpu | |
910 | (ep->desc->wMaxPacketSize))) | |
911 | return -EMSGSIZE; | |
912 | ||
913 | #ifdef USE_DMA | |
914 | // FIXME caller may already have done the dma mapping | |
915 | if (ep->dma >= 0) { | |
916 | _req->dma = dma_map_single(dev->dev, | |
917 | _req->buf, _req->length, | |
918 | ((ep->bEndpointAddress & USB_DIR_IN) != 0) | |
919 | ? DMA_TO_DEVICE | |
920 | : DMA_FROM_DEVICE); | |
921 | } | |
922 | #endif | |
923 | ||
924 | DBG(DBG_NOISY, "%s queue req %p, len %d buf %p\n", | |
925 | _ep->name, _req, _req->length, _req->buf); | |
926 | ||
927 | local_irq_save(flags); | |
928 | ||
929 | _req->status = -EINPROGRESS; | |
930 | _req->actual = 0; | |
931 | ||
932 | /* kickstart this i/o queue? */ | |
933 | if (list_empty(&ep->queue) && !ep->stopped) { | |
934 | if (ep->desc == 0 /* ep0 */) { | |
935 | unsigned length = _req->length; | |
936 | ||
937 | switch (dev->ep0state) { | |
938 | case EP0_IN_DATA_PHASE: | |
939 | dev->stats.write.ops++; | |
940 | if (write_ep0_fifo(ep, req)) | |
941 | req = NULL; | |
942 | break; | |
943 | ||
944 | case EP0_OUT_DATA_PHASE: | |
945 | dev->stats.read.ops++; | |
946 | /* messy ... */ | |
947 | if (dev->req_config) { | |
948 | DBG(DBG_VERBOSE, "ep0 config ack%s\n", | |
949 | dev->has_cfr ? "" : " raced"); | |
950 | if (dev->has_cfr) | |
951 | UDCCFR = UDCCFR_AREN|UDCCFR_ACM | |
952 | |UDCCFR_MB1; | |
953 | done(ep, req, 0); | |
954 | dev->ep0state = EP0_END_XFER; | |
955 | local_irq_restore (flags); | |
956 | return 0; | |
957 | } | |
958 | if (dev->req_pending) | |
959 | ep0start(dev, UDCCS0_IPR, "OUT"); | |
960 | if (length == 0 || ((UDCCS0 & UDCCS0_RNE) != 0 | |
961 | && read_ep0_fifo(ep, req))) { | |
962 | ep0_idle(dev); | |
963 | done(ep, req, 0); | |
964 | req = NULL; | |
965 | } | |
966 | break; | |
967 | ||
968 | default: | |
969 | DMSG("ep0 i/o, odd state %d\n", dev->ep0state); | |
970 | local_irq_restore (flags); | |
971 | return -EL2HLT; | |
972 | } | |
973 | #ifdef USE_DMA | |
974 | /* either start dma or prime pio pump */ | |
975 | } else if (ep->dma >= 0) { | |
976 | kick_dma(ep, req); | |
977 | #endif | |
978 | /* can the FIFO can satisfy the request immediately? */ | |
91987693 DB |
979 | } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0) { |
980 | if ((*ep->reg_udccs & UDCCS_BI_TFS) != 0 | |
981 | && write_fifo(ep, req)) | |
982 | req = NULL; | |
1da177e4 LT |
983 | } else if ((*ep->reg_udccs & UDCCS_BO_RFS) != 0 |
984 | && read_fifo(ep, req)) { | |
985 | req = NULL; | |
986 | } | |
987 | ||
988 | if (likely (req && ep->desc) && ep->dma < 0) | |
989 | pio_irq_enable(ep->bEndpointAddress); | |
990 | } | |
991 | ||
992 | /* pio or dma irq handler advances the queue. */ | |
993 | if (likely (req != 0)) | |
994 | list_add_tail(&req->queue, &ep->queue); | |
995 | local_irq_restore(flags); | |
996 | ||
997 | return 0; | |
998 | } | |
999 | ||
1000 | ||
1001 | /* | |
1002 | * nuke - dequeue ALL requests | |
1003 | */ | |
1004 | static void nuke(struct pxa2xx_ep *ep, int status) | |
1005 | { | |
1006 | struct pxa2xx_request *req; | |
1007 | ||
1008 | /* called with irqs blocked */ | |
1009 | #ifdef USE_DMA | |
1010 | if (ep->dma >= 0 && !ep->stopped) | |
1011 | cancel_dma(ep); | |
1012 | #endif | |
1013 | while (!list_empty(&ep->queue)) { | |
1014 | req = list_entry(ep->queue.next, | |
1015 | struct pxa2xx_request, | |
1016 | queue); | |
1017 | done(ep, req, status); | |
1018 | } | |
1019 | if (ep->desc) | |
1020 | pio_irq_disable (ep->bEndpointAddress); | |
1021 | } | |
1022 | ||
1023 | ||
1024 | /* dequeue JUST ONE request */ | |
1025 | static int pxa2xx_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
1026 | { | |
1027 | struct pxa2xx_ep *ep; | |
1028 | struct pxa2xx_request *req; | |
1029 | unsigned long flags; | |
1030 | ||
1031 | ep = container_of(_ep, struct pxa2xx_ep, ep); | |
1032 | if (!_ep || ep->ep.name == ep0name) | |
1033 | return -EINVAL; | |
1034 | ||
1035 | local_irq_save(flags); | |
1036 | ||
1037 | /* make sure it's actually queued on this endpoint */ | |
1038 | list_for_each_entry (req, &ep->queue, queue) { | |
1039 | if (&req->req == _req) | |
1040 | break; | |
1041 | } | |
1042 | if (&req->req != _req) { | |
1043 | local_irq_restore(flags); | |
1044 | return -EINVAL; | |
1045 | } | |
1046 | ||
1047 | #ifdef USE_DMA | |
1048 | if (ep->dma >= 0 && ep->queue.next == &req->queue && !ep->stopped) { | |
1049 | cancel_dma(ep); | |
1050 | done(ep, req, -ECONNRESET); | |
1051 | /* restart i/o */ | |
1052 | if (!list_empty(&ep->queue)) { | |
1053 | req = list_entry(ep->queue.next, | |
1054 | struct pxa2xx_request, queue); | |
1055 | kick_dma(ep, req); | |
1056 | } | |
1057 | } else | |
1058 | #endif | |
1059 | done(ep, req, -ECONNRESET); | |
1060 | ||
1061 | local_irq_restore(flags); | |
1062 | return 0; | |
1063 | } | |
1064 | ||
1065 | /*-------------------------------------------------------------------------*/ | |
1066 | ||
1067 | static int pxa2xx_ep_set_halt(struct usb_ep *_ep, int value) | |
1068 | { | |
1069 | struct pxa2xx_ep *ep; | |
1070 | unsigned long flags; | |
1071 | ||
1072 | ep = container_of(_ep, struct pxa2xx_ep, ep); | |
1073 | if (unlikely (!_ep | |
1074 | || (!ep->desc && ep->ep.name != ep0name)) | |
1075 | || ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) { | |
1076 | DMSG("%s, bad ep\n", __FUNCTION__); | |
1077 | return -EINVAL; | |
1078 | } | |
1079 | if (value == 0) { | |
1080 | /* this path (reset toggle+halt) is needed to implement | |
1081 | * SET_INTERFACE on normal hardware. but it can't be | |
1082 | * done from software on the PXA UDC, and the hardware | |
1083 | * forgets to do it as part of SET_INTERFACE automagic. | |
1084 | */ | |
1085 | DMSG("only host can clear %s halt\n", _ep->name); | |
1086 | return -EROFS; | |
1087 | } | |
1088 | ||
1089 | local_irq_save(flags); | |
1090 | ||
1091 | if ((ep->bEndpointAddress & USB_DIR_IN) != 0 | |
1092 | && ((*ep->reg_udccs & UDCCS_BI_TFS) == 0 | |
1093 | || !list_empty(&ep->queue))) { | |
1094 | local_irq_restore(flags); | |
1095 | return -EAGAIN; | |
1096 | } | |
1097 | ||
1098 | /* FST bit is the same for control, bulk in, bulk out, interrupt in */ | |
1099 | *ep->reg_udccs = UDCCS_BI_FST|UDCCS_BI_FTF; | |
1100 | ||
1101 | /* ep0 needs special care */ | |
1102 | if (!ep->desc) { | |
1103 | start_watchdog(ep->dev); | |
1104 | ep->dev->req_pending = 0; | |
1105 | ep->dev->ep0state = EP0_STALL; | |
1106 | ||
1107 | /* and bulk/intr endpoints like dropping stalls too */ | |
1108 | } else { | |
1109 | unsigned i; | |
1110 | for (i = 0; i < 1000; i += 20) { | |
1111 | if (*ep->reg_udccs & UDCCS_BI_SST) | |
1112 | break; | |
1113 | udelay(20); | |
1114 | } | |
1115 | } | |
1116 | local_irq_restore(flags); | |
1117 | ||
1118 | DBG(DBG_VERBOSE, "%s halt\n", _ep->name); | |
1119 | return 0; | |
1120 | } | |
1121 | ||
1122 | static int pxa2xx_ep_fifo_status(struct usb_ep *_ep) | |
1123 | { | |
1124 | struct pxa2xx_ep *ep; | |
1125 | ||
1126 | ep = container_of(_ep, struct pxa2xx_ep, ep); | |
1127 | if (!_ep) { | |
1128 | DMSG("%s, bad ep\n", __FUNCTION__); | |
1129 | return -ENODEV; | |
1130 | } | |
1131 | /* pxa can't report unclaimed bytes from IN fifos */ | |
1132 | if ((ep->bEndpointAddress & USB_DIR_IN) != 0) | |
1133 | return -EOPNOTSUPP; | |
1134 | if (ep->dev->gadget.speed == USB_SPEED_UNKNOWN | |
1135 | || (*ep->reg_udccs & UDCCS_BO_RFS) == 0) | |
1136 | return 0; | |
1137 | else | |
1138 | return (*ep->reg_ubcr & 0xfff) + 1; | |
1139 | } | |
1140 | ||
1141 | static void pxa2xx_ep_fifo_flush(struct usb_ep *_ep) | |
1142 | { | |
1143 | struct pxa2xx_ep *ep; | |
1144 | ||
1145 | ep = container_of(_ep, struct pxa2xx_ep, ep); | |
1146 | if (!_ep || ep->ep.name == ep0name || !list_empty(&ep->queue)) { | |
1147 | DMSG("%s, bad ep\n", __FUNCTION__); | |
1148 | return; | |
1149 | } | |
1150 | ||
1151 | /* toggle and halt bits stay unchanged */ | |
1152 | ||
1153 | /* for OUT, just read and discard the FIFO contents. */ | |
1154 | if ((ep->bEndpointAddress & USB_DIR_IN) == 0) { | |
1155 | while (((*ep->reg_udccs) & UDCCS_BO_RNE) != 0) | |
1156 | (void) *ep->reg_uddr; | |
1157 | return; | |
1158 | } | |
1159 | ||
1160 | /* most IN status is the same, but ISO can't stall */ | |
1161 | *ep->reg_udccs = UDCCS_BI_TPC|UDCCS_BI_FTF|UDCCS_BI_TUR | |
1162 | | (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) | |
1163 | ? 0 : UDCCS_BI_SST; | |
1164 | } | |
1165 | ||
1166 | ||
1167 | static struct usb_ep_ops pxa2xx_ep_ops = { | |
1168 | .enable = pxa2xx_ep_enable, | |
1169 | .disable = pxa2xx_ep_disable, | |
1170 | ||
1171 | .alloc_request = pxa2xx_ep_alloc_request, | |
1172 | .free_request = pxa2xx_ep_free_request, | |
1173 | ||
1174 | .alloc_buffer = pxa2xx_ep_alloc_buffer, | |
1175 | .free_buffer = pxa2xx_ep_free_buffer, | |
1176 | ||
1177 | .queue = pxa2xx_ep_queue, | |
1178 | .dequeue = pxa2xx_ep_dequeue, | |
1179 | ||
1180 | .set_halt = pxa2xx_ep_set_halt, | |
1181 | .fifo_status = pxa2xx_ep_fifo_status, | |
1182 | .fifo_flush = pxa2xx_ep_fifo_flush, | |
1183 | }; | |
1184 | ||
1185 | ||
1186 | /* --------------------------------------------------------------------------- | |
1187 | * device-scoped parts of the api to the usb controller hardware | |
1188 | * --------------------------------------------------------------------------- | |
1189 | */ | |
1190 | ||
1191 | static int pxa2xx_udc_get_frame(struct usb_gadget *_gadget) | |
1192 | { | |
1193 | return ((UFNRH & 0x07) << 8) | (UFNRL & 0xff); | |
1194 | } | |
1195 | ||
1196 | static int pxa2xx_udc_wakeup(struct usb_gadget *_gadget) | |
1197 | { | |
1198 | /* host may not have enabled remote wakeup */ | |
1199 | if ((UDCCS0 & UDCCS0_DRWF) == 0) | |
1200 | return -EHOSTUNREACH; | |
1201 | udc_set_mask_UDCCR(UDCCR_RSM); | |
1202 | return 0; | |
1203 | } | |
1204 | ||
1205 | static void stop_activity(struct pxa2xx_udc *, struct usb_gadget_driver *); | |
1206 | static void udc_enable (struct pxa2xx_udc *); | |
1207 | static void udc_disable(struct pxa2xx_udc *); | |
1208 | ||
1209 | /* We disable the UDC -- and its 48 MHz clock -- whenever it's not | |
1210 | * in active use. | |
1211 | */ | |
1212 | static int pullup(struct pxa2xx_udc *udc, int is_active) | |
1213 | { | |
1214 | is_active = is_active && udc->vbus && udc->pullup; | |
1215 | DMSG("%s\n", is_active ? "active" : "inactive"); | |
1216 | if (is_active) | |
1217 | udc_enable(udc); | |
1218 | else { | |
1219 | if (udc->gadget.speed != USB_SPEED_UNKNOWN) { | |
1220 | DMSG("disconnect %s\n", udc->driver | |
1221 | ? udc->driver->driver.name | |
1222 | : "(no driver)"); | |
1223 | stop_activity(udc, udc->driver); | |
1224 | } | |
1225 | udc_disable(udc); | |
1226 | } | |
1227 | return 0; | |
1228 | } | |
1229 | ||
1230 | /* VBUS reporting logically comes from a transceiver */ | |
1231 | static int pxa2xx_udc_vbus_session(struct usb_gadget *_gadget, int is_active) | |
1232 | { | |
1233 | struct pxa2xx_udc *udc; | |
1234 | ||
1235 | udc = container_of(_gadget, struct pxa2xx_udc, gadget); | |
1236 | udc->vbus = is_active = (is_active != 0); | |
1237 | DMSG("vbus %s\n", is_active ? "supplied" : "inactive"); | |
1238 | pullup(udc, is_active); | |
1239 | return 0; | |
1240 | } | |
1241 | ||
1242 | /* drivers may have software control over D+ pullup */ | |
1243 | static int pxa2xx_udc_pullup(struct usb_gadget *_gadget, int is_active) | |
1244 | { | |
1245 | struct pxa2xx_udc *udc; | |
1246 | ||
1247 | udc = container_of(_gadget, struct pxa2xx_udc, gadget); | |
1248 | ||
1249 | /* not all boards support pullup control */ | |
1250 | if (!udc->mach->udc_command) | |
1251 | return -EOPNOTSUPP; | |
1252 | ||
1253 | is_active = (is_active != 0); | |
1254 | udc->pullup = is_active; | |
1255 | pullup(udc, is_active); | |
1256 | return 0; | |
1257 | } | |
1258 | ||
1259 | static const struct usb_gadget_ops pxa2xx_udc_ops = { | |
1260 | .get_frame = pxa2xx_udc_get_frame, | |
1261 | .wakeup = pxa2xx_udc_wakeup, | |
1262 | .vbus_session = pxa2xx_udc_vbus_session, | |
1263 | .pullup = pxa2xx_udc_pullup, | |
1264 | ||
1265 | // .vbus_draw ... boards may consume current from VBUS, up to | |
1266 | // 100-500mA based on config. the 500uA suspend ceiling means | |
1267 | // that exclusively vbus-powered PXA designs violate USB specs. | |
1268 | }; | |
1269 | ||
1270 | /*-------------------------------------------------------------------------*/ | |
1271 | ||
1272 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
1273 | ||
1274 | static const char proc_node_name [] = "driver/udc"; | |
1275 | ||
1276 | static int | |
1277 | udc_proc_read(char *page, char **start, off_t off, int count, | |
1278 | int *eof, void *_dev) | |
1279 | { | |
1280 | char *buf = page; | |
1281 | struct pxa2xx_udc *dev = _dev; | |
1282 | char *next = buf; | |
1283 | unsigned size = count; | |
1284 | unsigned long flags; | |
1285 | int i, t; | |
1286 | u32 tmp; | |
1287 | ||
1288 | if (off != 0) | |
1289 | return 0; | |
1290 | ||
1291 | local_irq_save(flags); | |
1292 | ||
1293 | /* basic device status */ | |
1294 | t = scnprintf(next, size, DRIVER_DESC "\n" | |
1295 | "%s version: %s\nGadget driver: %s\nHost %s\n\n", | |
1296 | driver_name, DRIVER_VERSION SIZE_STR DMASTR, | |
1297 | dev->driver ? dev->driver->driver.name : "(none)", | |
91987693 | 1298 | is_vbus_present() ? "full speed" : "disconnected"); |
1da177e4 LT |
1299 | size -= t; |
1300 | next += t; | |
1301 | ||
1302 | /* registers for device and ep0 */ | |
1303 | t = scnprintf(next, size, | |
1304 | "uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n", | |
1305 | UICR1, UICR0, USIR1, USIR0, UFNRH, UFNRL); | |
1306 | size -= t; | |
1307 | next += t; | |
1308 | ||
1309 | tmp = UDCCR; | |
1310 | t = scnprintf(next, size, | |
1311 | "udccr %02X =%s%s%s%s%s%s%s%s\n", tmp, | |
1312 | (tmp & UDCCR_REM) ? " rem" : "", | |
1313 | (tmp & UDCCR_RSTIR) ? " rstir" : "", | |
1314 | (tmp & UDCCR_SRM) ? " srm" : "", | |
1315 | (tmp & UDCCR_SUSIR) ? " susir" : "", | |
1316 | (tmp & UDCCR_RESIR) ? " resir" : "", | |
1317 | (tmp & UDCCR_RSM) ? " rsm" : "", | |
1318 | (tmp & UDCCR_UDA) ? " uda" : "", | |
1319 | (tmp & UDCCR_UDE) ? " ude" : ""); | |
1320 | size -= t; | |
1321 | next += t; | |
1322 | ||
1323 | tmp = UDCCS0; | |
1324 | t = scnprintf(next, size, | |
1325 | "udccs0 %02X =%s%s%s%s%s%s%s%s\n", tmp, | |
1326 | (tmp & UDCCS0_SA) ? " sa" : "", | |
1327 | (tmp & UDCCS0_RNE) ? " rne" : "", | |
1328 | (tmp & UDCCS0_FST) ? " fst" : "", | |
1329 | (tmp & UDCCS0_SST) ? " sst" : "", | |
1330 | (tmp & UDCCS0_DRWF) ? " dwrf" : "", | |
1331 | (tmp & UDCCS0_FTF) ? " ftf" : "", | |
1332 | (tmp & UDCCS0_IPR) ? " ipr" : "", | |
1333 | (tmp & UDCCS0_OPR) ? " opr" : ""); | |
1334 | size -= t; | |
1335 | next += t; | |
1336 | ||
1337 | if (dev->has_cfr) { | |
1338 | tmp = UDCCFR; | |
1339 | t = scnprintf(next, size, | |
1340 | "udccfr %02X =%s%s\n", tmp, | |
1341 | (tmp & UDCCFR_AREN) ? " aren" : "", | |
1342 | (tmp & UDCCFR_ACM) ? " acm" : ""); | |
1343 | size -= t; | |
1344 | next += t; | |
1345 | } | |
1346 | ||
91987693 | 1347 | if (!is_vbus_present() || !dev->driver) |
1da177e4 LT |
1348 | goto done; |
1349 | ||
1350 | t = scnprintf(next, size, "ep0 IN %lu/%lu, OUT %lu/%lu\nirqs %lu\n\n", | |
1351 | dev->stats.write.bytes, dev->stats.write.ops, | |
1352 | dev->stats.read.bytes, dev->stats.read.ops, | |
1353 | dev->stats.irqs); | |
1354 | size -= t; | |
1355 | next += t; | |
1356 | ||
1357 | /* dump endpoint queues */ | |
1358 | for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) { | |
1359 | struct pxa2xx_ep *ep = &dev->ep [i]; | |
1360 | struct pxa2xx_request *req; | |
1361 | int t; | |
1362 | ||
1363 | if (i != 0) { | |
1364 | const struct usb_endpoint_descriptor *d; | |
1365 | ||
1366 | d = ep->desc; | |
1367 | if (!d) | |
1368 | continue; | |
1369 | tmp = *dev->ep [i].reg_udccs; | |
1370 | t = scnprintf(next, size, | |
1371 | "%s max %d %s udccs %02x irqs %lu/%lu\n", | |
1372 | ep->ep.name, le16_to_cpu (d->wMaxPacketSize), | |
1373 | (ep->dma >= 0) ? "dma" : "pio", tmp, | |
1374 | ep->pio_irqs, ep->dma_irqs); | |
1375 | /* TODO translate all five groups of udccs bits! */ | |
1376 | ||
1377 | } else /* ep0 should only have one transfer queued */ | |
1378 | t = scnprintf(next, size, "ep0 max 16 pio irqs %lu\n", | |
1379 | ep->pio_irqs); | |
1380 | if (t <= 0 || t > size) | |
1381 | goto done; | |
1382 | size -= t; | |
1383 | next += t; | |
1384 | ||
1385 | if (list_empty(&ep->queue)) { | |
1386 | t = scnprintf(next, size, "\t(nothing queued)\n"); | |
1387 | if (t <= 0 || t > size) | |
1388 | goto done; | |
1389 | size -= t; | |
1390 | next += t; | |
1391 | continue; | |
1392 | } | |
1393 | list_for_each_entry(req, &ep->queue, queue) { | |
1394 | #ifdef USE_DMA | |
1395 | if (ep->dma >= 0 && req->queue.prev == &ep->queue) | |
1396 | t = scnprintf(next, size, | |
1397 | "\treq %p len %d/%d " | |
1398 | "buf %p (dma%d dcmd %08x)\n", | |
1399 | &req->req, req->req.actual, | |
1400 | req->req.length, req->req.buf, | |
1401 | ep->dma, DCMD(ep->dma) | |
1402 | // low 13 bits == bytes-to-go | |
1403 | ); | |
1404 | else | |
1405 | #endif | |
1406 | t = scnprintf(next, size, | |
1407 | "\treq %p len %d/%d buf %p\n", | |
1408 | &req->req, req->req.actual, | |
1409 | req->req.length, req->req.buf); | |
1410 | if (t <= 0 || t > size) | |
1411 | goto done; | |
1412 | size -= t; | |
1413 | next += t; | |
1414 | } | |
1415 | } | |
1416 | ||
1417 | done: | |
1418 | local_irq_restore(flags); | |
1419 | *eof = 1; | |
1420 | return count - size; | |
1421 | } | |
1422 | ||
1423 | #define create_proc_files() \ | |
1424 | create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev) | |
1425 | #define remove_proc_files() \ | |
1426 | remove_proc_entry(proc_node_name, NULL) | |
1427 | ||
1428 | #else /* !CONFIG_USB_GADGET_DEBUG_FILES */ | |
1429 | ||
1430 | #define create_proc_files() do {} while (0) | |
1431 | #define remove_proc_files() do {} while (0) | |
1432 | ||
1433 | #endif /* CONFIG_USB_GADGET_DEBUG_FILES */ | |
1434 | ||
1435 | /* "function" sysfs attribute */ | |
1436 | static ssize_t | |
10523b3b | 1437 | show_function (struct device *_dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
1438 | { |
1439 | struct pxa2xx_udc *dev = dev_get_drvdata (_dev); | |
1440 | ||
1441 | if (!dev->driver | |
1442 | || !dev->driver->function | |
1443 | || strlen (dev->driver->function) > PAGE_SIZE) | |
1444 | return 0; | |
1445 | return scnprintf (buf, PAGE_SIZE, "%s\n", dev->driver->function); | |
1446 | } | |
1447 | static DEVICE_ATTR (function, S_IRUGO, show_function, NULL); | |
1448 | ||
1449 | /*-------------------------------------------------------------------------*/ | |
1450 | ||
1451 | /* | |
1452 | * udc_disable - disable USB device controller | |
1453 | */ | |
1454 | static void udc_disable(struct pxa2xx_udc *dev) | |
1455 | { | |
1456 | /* block all irqs */ | |
1457 | udc_set_mask_UDCCR(UDCCR_SRM|UDCCR_REM); | |
1458 | UICR0 = UICR1 = 0xff; | |
1459 | UFNRH = UFNRH_SIM; | |
1460 | ||
1461 | /* if hardware supports it, disconnect from usb */ | |
91987693 | 1462 | pullup_off(); |
1da177e4 LT |
1463 | |
1464 | udc_clear_mask_UDCCR(UDCCR_UDE); | |
1465 | ||
1466 | #ifdef CONFIG_ARCH_PXA | |
1467 | /* Disable clock for USB device */ | |
1468 | pxa_set_cken(CKEN11_USB, 0); | |
1469 | #endif | |
1470 | ||
1471 | ep0_idle (dev); | |
1472 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
1473 | LED_CONNECTED_OFF; | |
1474 | } | |
1475 | ||
1476 | ||
1477 | /* | |
1478 | * udc_reinit - initialize software state | |
1479 | */ | |
1480 | static void udc_reinit(struct pxa2xx_udc *dev) | |
1481 | { | |
1482 | u32 i; | |
1483 | ||
1484 | /* device/ep0 records init */ | |
1485 | INIT_LIST_HEAD (&dev->gadget.ep_list); | |
1486 | INIT_LIST_HEAD (&dev->gadget.ep0->ep_list); | |
1487 | dev->ep0state = EP0_IDLE; | |
1488 | ||
1489 | /* basic endpoint records init */ | |
1490 | for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) { | |
1491 | struct pxa2xx_ep *ep = &dev->ep[i]; | |
1492 | ||
1493 | if (i != 0) | |
1494 | list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list); | |
1495 | ||
1496 | ep->desc = NULL; | |
1497 | ep->stopped = 0; | |
1498 | INIT_LIST_HEAD (&ep->queue); | |
1499 | ep->pio_irqs = ep->dma_irqs = 0; | |
1500 | } | |
1501 | ||
1502 | /* the rest was statically initialized, and is read-only */ | |
1503 | } | |
1504 | ||
1505 | /* until it's enabled, this UDC should be completely invisible | |
1506 | * to any USB host. | |
1507 | */ | |
1508 | static void udc_enable (struct pxa2xx_udc *dev) | |
1509 | { | |
1510 | udc_clear_mask_UDCCR(UDCCR_UDE); | |
1511 | ||
1512 | #ifdef CONFIG_ARCH_PXA | |
1513 | /* Enable clock for USB device */ | |
1514 | pxa_set_cken(CKEN11_USB, 1); | |
1515 | udelay(5); | |
1516 | #endif | |
1517 | ||
1518 | /* try to clear these bits before we enable the udc */ | |
1519 | udc_ack_int_UDCCR(UDCCR_SUSIR|/*UDCCR_RSTIR|*/UDCCR_RESIR); | |
1520 | ||
1521 | ep0_idle(dev); | |
1522 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
1523 | dev->stats.irqs = 0; | |
1524 | ||
1525 | /* | |
1526 | * sequence taken from chapter 12.5.10, PXA250 AppProcDevManual: | |
1527 | * - enable UDC | |
1528 | * - if RESET is already in progress, ack interrupt | |
1529 | * - unmask reset interrupt | |
1530 | */ | |
1531 | udc_set_mask_UDCCR(UDCCR_UDE); | |
1532 | if (!(UDCCR & UDCCR_UDA)) | |
1533 | udc_ack_int_UDCCR(UDCCR_RSTIR); | |
1534 | ||
1535 | if (dev->has_cfr /* UDC_RES2 is defined */) { | |
1536 | /* pxa255 (a0+) can avoid a set_config race that could | |
1537 | * prevent gadget drivers from configuring correctly | |
1538 | */ | |
1539 | UDCCFR = UDCCFR_ACM | UDCCFR_MB1; | |
1540 | } else { | |
1541 | /* "USB test mode" for pxa250 errata 40-42 (stepping a0, a1) | |
1542 | * which could result in missing packets and interrupts. | |
1543 | * supposedly one bit per endpoint, controlling whether it | |
1544 | * double buffers or not; ACM/AREN bits fit into the holes. | |
1545 | * zero bits (like USIR0_IRx) disable double buffering. | |
1546 | */ | |
1547 | UDC_RES1 = 0x00; | |
1548 | UDC_RES2 = 0x00; | |
1549 | } | |
1550 | ||
1551 | #ifdef DISABLE_TEST_MODE | |
1552 | /* "test mode" seems to have become the default in later chip | |
1553 | * revs, preventing double buffering (and invalidating docs). | |
1554 | * this EXPERIMENT enables it for bulk endpoints by tweaking | |
1555 | * undefined/reserved register bits (that other drivers clear). | |
1556 | * Belcarra code comments noted this usage. | |
1557 | */ | |
1558 | if (fifo_mode & 1) { /* IN endpoints */ | |
1559 | UDC_RES1 |= USIR0_IR1|USIR0_IR6; | |
1560 | UDC_RES2 |= USIR1_IR11; | |
1561 | } | |
1562 | if (fifo_mode & 2) { /* OUT endpoints */ | |
1563 | UDC_RES1 |= USIR0_IR2|USIR0_IR7; | |
1564 | UDC_RES2 |= USIR1_IR12; | |
1565 | } | |
1566 | #endif | |
1567 | ||
1568 | /* enable suspend/resume and reset irqs */ | |
1569 | udc_clear_mask_UDCCR(UDCCR_SRM | UDCCR_REM); | |
1570 | ||
1571 | /* enable ep0 irqs */ | |
1572 | UICR0 &= ~UICR0_IM0; | |
1573 | ||
1574 | /* if hardware supports it, pullup D+ and wait for reset */ | |
91987693 | 1575 | pullup_on(); |
1da177e4 LT |
1576 | } |
1577 | ||
1578 | ||
1579 | /* when a driver is successfully registered, it will receive | |
1580 | * control requests including set_configuration(), which enables | |
1581 | * non-control requests. then usb traffic follows until a | |
1582 | * disconnect is reported. then a host may connect again, or | |
1583 | * the driver might get unbound. | |
1584 | */ | |
1585 | int usb_gadget_register_driver(struct usb_gadget_driver *driver) | |
1586 | { | |
1587 | struct pxa2xx_udc *dev = the_controller; | |
1588 | int retval; | |
1589 | ||
1590 | if (!driver | |
7c0642c1 | 1591 | || driver->speed < USB_SPEED_FULL |
1da177e4 LT |
1592 | || !driver->bind |
1593 | || !driver->unbind | |
1594 | || !driver->disconnect | |
1595 | || !driver->setup) | |
1596 | return -EINVAL; | |
1597 | if (!dev) | |
1598 | return -ENODEV; | |
1599 | if (dev->driver) | |
1600 | return -EBUSY; | |
1601 | ||
1602 | /* first hook up the driver ... */ | |
1603 | dev->driver = driver; | |
1604 | dev->gadget.dev.driver = &driver->driver; | |
1605 | dev->pullup = 1; | |
1606 | ||
1607 | device_add (&dev->gadget.dev); | |
1608 | retval = driver->bind(&dev->gadget); | |
1609 | if (retval) { | |
1610 | DMSG("bind to driver %s --> error %d\n", | |
1611 | driver->driver.name, retval); | |
1612 | device_del (&dev->gadget.dev); | |
1613 | ||
1614 | dev->driver = NULL; | |
1615 | dev->gadget.dev.driver = NULL; | |
1616 | return retval; | |
1617 | } | |
1618 | device_create_file(dev->dev, &dev_attr_function); | |
1619 | ||
1620 | /* ... then enable host detection and ep0; and we're ready | |
1621 | * for set_configuration as well as eventual disconnect. | |
1622 | */ | |
1623 | DMSG("registered gadget driver '%s'\n", driver->driver.name); | |
1624 | pullup(dev, 1); | |
1625 | dump_state(dev); | |
1626 | return 0; | |
1627 | } | |
1628 | EXPORT_SYMBOL(usb_gadget_register_driver); | |
1629 | ||
1630 | static void | |
1631 | stop_activity(struct pxa2xx_udc *dev, struct usb_gadget_driver *driver) | |
1632 | { | |
1633 | int i; | |
1634 | ||
1635 | /* don't disconnect drivers more than once */ | |
1636 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1637 | driver = NULL; | |
1638 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
1639 | ||
1640 | /* prevent new request submissions, kill any outstanding requests */ | |
1641 | for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) { | |
1642 | struct pxa2xx_ep *ep = &dev->ep[i]; | |
1643 | ||
1644 | ep->stopped = 1; | |
1645 | nuke(ep, -ESHUTDOWN); | |
1646 | } | |
1647 | del_timer_sync(&dev->timer); | |
1648 | ||
1649 | /* report disconnect; the driver is already quiesced */ | |
1650 | LED_CONNECTED_OFF; | |
1651 | if (driver) | |
1652 | driver->disconnect(&dev->gadget); | |
1653 | ||
1654 | /* re-init driver-visible data structures */ | |
1655 | udc_reinit(dev); | |
1656 | } | |
1657 | ||
1658 | int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) | |
1659 | { | |
1660 | struct pxa2xx_udc *dev = the_controller; | |
1661 | ||
1662 | if (!dev) | |
1663 | return -ENODEV; | |
1664 | if (!driver || driver != dev->driver) | |
1665 | return -EINVAL; | |
1666 | ||
1667 | local_irq_disable(); | |
1668 | pullup(dev, 0); | |
1669 | stop_activity(dev, driver); | |
1670 | local_irq_enable(); | |
1671 | ||
1672 | driver->unbind(&dev->gadget); | |
1673 | dev->driver = NULL; | |
1674 | ||
1675 | device_del (&dev->gadget.dev); | |
1676 | device_remove_file(dev->dev, &dev_attr_function); | |
1677 | ||
1678 | DMSG("unregistered gadget driver '%s'\n", driver->driver.name); | |
1679 | dump_state(dev); | |
1680 | return 0; | |
1681 | } | |
1682 | EXPORT_SYMBOL(usb_gadget_unregister_driver); | |
1683 | ||
1684 | ||
1685 | /*-------------------------------------------------------------------------*/ | |
1686 | ||
1687 | #ifdef CONFIG_ARCH_LUBBOCK | |
1688 | ||
1689 | /* Lubbock has separate connect and disconnect irqs. More typical designs | |
1690 | * use one GPIO as the VBUS IRQ, and another to control the D+ pullup. | |
1691 | */ | |
1692 | ||
1693 | static irqreturn_t | |
1694 | lubbock_vbus_irq(int irq, void *_dev, struct pt_regs *r) | |
1695 | { | |
1696 | struct pxa2xx_udc *dev = _dev; | |
1697 | int vbus; | |
1698 | ||
1699 | dev->stats.irqs++; | |
1700 | HEX_DISPLAY(dev->stats.irqs); | |
1701 | switch (irq) { | |
1702 | case LUBBOCK_USB_IRQ: | |
1703 | LED_CONNECTED_ON; | |
1704 | vbus = 1; | |
1705 | disable_irq(LUBBOCK_USB_IRQ); | |
1706 | enable_irq(LUBBOCK_USB_DISC_IRQ); | |
1707 | break; | |
1708 | case LUBBOCK_USB_DISC_IRQ: | |
1709 | LED_CONNECTED_OFF; | |
1710 | vbus = 0; | |
1711 | disable_irq(LUBBOCK_USB_DISC_IRQ); | |
1712 | enable_irq(LUBBOCK_USB_IRQ); | |
1713 | break; | |
1714 | default: | |
1715 | return IRQ_NONE; | |
1716 | } | |
1717 | ||
1718 | pxa2xx_udc_vbus_session(&dev->gadget, vbus); | |
1719 | return IRQ_HANDLED; | |
1720 | } | |
1721 | ||
1722 | #endif | |
1723 | ||
1724 | ||
1725 | /*-------------------------------------------------------------------------*/ | |
1726 | ||
1727 | static inline void clear_ep_state (struct pxa2xx_udc *dev) | |
1728 | { | |
1729 | unsigned i; | |
1730 | ||
1731 | /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint | |
1732 | * fifos, and pending transactions mustn't be continued in any case. | |
1733 | */ | |
1734 | for (i = 1; i < PXA_UDC_NUM_ENDPOINTS; i++) | |
1735 | nuke(&dev->ep[i], -ECONNABORTED); | |
1736 | } | |
1737 | ||
1738 | static void udc_watchdog(unsigned long _dev) | |
1739 | { | |
1740 | struct pxa2xx_udc *dev = (void *)_dev; | |
1741 | ||
1742 | local_irq_disable(); | |
1743 | if (dev->ep0state == EP0_STALL | |
1744 | && (UDCCS0 & UDCCS0_FST) == 0 | |
1745 | && (UDCCS0 & UDCCS0_SST) == 0) { | |
1746 | UDCCS0 = UDCCS0_FST|UDCCS0_FTF; | |
1747 | DBG(DBG_VERBOSE, "ep0 re-stall\n"); | |
1748 | start_watchdog(dev); | |
1749 | } | |
1750 | local_irq_enable(); | |
1751 | } | |
1752 | ||
1753 | static void handle_ep0 (struct pxa2xx_udc *dev) | |
1754 | { | |
1755 | u32 udccs0 = UDCCS0; | |
1756 | struct pxa2xx_ep *ep = &dev->ep [0]; | |
1757 | struct pxa2xx_request *req; | |
1758 | union { | |
1759 | struct usb_ctrlrequest r; | |
1760 | u8 raw [8]; | |
1761 | u32 word [2]; | |
1762 | } u; | |
1763 | ||
1764 | if (list_empty(&ep->queue)) | |
1765 | req = NULL; | |
1766 | else | |
1767 | req = list_entry(ep->queue.next, struct pxa2xx_request, queue); | |
1768 | ||
1769 | /* clear stall status */ | |
1770 | if (udccs0 & UDCCS0_SST) { | |
1771 | nuke(ep, -EPIPE); | |
1772 | UDCCS0 = UDCCS0_SST; | |
1773 | del_timer(&dev->timer); | |
1774 | ep0_idle(dev); | |
1775 | } | |
1776 | ||
1777 | /* previous request unfinished? non-error iff back-to-back ... */ | |
1778 | if ((udccs0 & UDCCS0_SA) != 0 && dev->ep0state != EP0_IDLE) { | |
1779 | nuke(ep, 0); | |
1780 | del_timer(&dev->timer); | |
1781 | ep0_idle(dev); | |
1782 | } | |
1783 | ||
1784 | switch (dev->ep0state) { | |
1785 | case EP0_IDLE: | |
1786 | /* late-breaking status? */ | |
1787 | udccs0 = UDCCS0; | |
1788 | ||
1789 | /* start control request? */ | |
1790 | if (likely((udccs0 & (UDCCS0_OPR|UDCCS0_SA|UDCCS0_RNE)) | |
1791 | == (UDCCS0_OPR|UDCCS0_SA|UDCCS0_RNE))) { | |
1792 | int i; | |
1793 | ||
1794 | nuke (ep, -EPROTO); | |
1795 | ||
1796 | /* read SETUP packet */ | |
1797 | for (i = 0; i < 8; i++) { | |
1798 | if (unlikely(!(UDCCS0 & UDCCS0_RNE))) { | |
1799 | bad_setup: | |
1800 | DMSG("SETUP %d!\n", i); | |
1801 | goto stall; | |
1802 | } | |
1803 | u.raw [i] = (u8) UDDR0; | |
1804 | } | |
1805 | if (unlikely((UDCCS0 & UDCCS0_RNE) != 0)) | |
1806 | goto bad_setup; | |
1807 | ||
1808 | got_setup: | |
1809 | DBG(DBG_VERBOSE, "SETUP %02x.%02x v%04x i%04x l%04x\n", | |
1810 | u.r.bRequestType, u.r.bRequest, | |
1811 | le16_to_cpu(u.r.wValue), | |
1812 | le16_to_cpu(u.r.wIndex), | |
1813 | le16_to_cpu(u.r.wLength)); | |
1814 | ||
1815 | /* cope with automagic for some standard requests. */ | |
1816 | dev->req_std = (u.r.bRequestType & USB_TYPE_MASK) | |
1817 | == USB_TYPE_STANDARD; | |
1818 | dev->req_config = 0; | |
1819 | dev->req_pending = 1; | |
1820 | switch (u.r.bRequest) { | |
1821 | /* hardware restricts gadget drivers here! */ | |
1822 | case USB_REQ_SET_CONFIGURATION: | |
1823 | if (u.r.bRequestType == USB_RECIP_DEVICE) { | |
1824 | /* reflect hardware's automagic | |
1825 | * up to the gadget driver. | |
1826 | */ | |
1827 | config_change: | |
1828 | dev->req_config = 1; | |
1829 | clear_ep_state(dev); | |
1830 | /* if !has_cfr, there's no synch | |
1831 | * else use AREN (later) not SA|OPR | |
1832 | * USIR0_IR0 acts edge sensitive | |
1833 | */ | |
1834 | } | |
1835 | break; | |
1836 | /* ... and here, even more ... */ | |
1837 | case USB_REQ_SET_INTERFACE: | |
1838 | if (u.r.bRequestType == USB_RECIP_INTERFACE) { | |
1839 | /* udc hardware is broken by design: | |
1840 | * - altsetting may only be zero; | |
1841 | * - hw resets all interfaces' eps; | |
1842 | * - ep reset doesn't include halt(?). | |
1843 | */ | |
1844 | DMSG("broken set_interface (%d/%d)\n", | |
1845 | le16_to_cpu(u.r.wIndex), | |
1846 | le16_to_cpu(u.r.wValue)); | |
1847 | goto config_change; | |
1848 | } | |
1849 | break; | |
1850 | /* hardware was supposed to hide this */ | |
1851 | case USB_REQ_SET_ADDRESS: | |
1852 | if (u.r.bRequestType == USB_RECIP_DEVICE) { | |
1853 | ep0start(dev, 0, "address"); | |
1854 | return; | |
1855 | } | |
1856 | break; | |
1857 | } | |
1858 | ||
1859 | if (u.r.bRequestType & USB_DIR_IN) | |
1860 | dev->ep0state = EP0_IN_DATA_PHASE; | |
1861 | else | |
1862 | dev->ep0state = EP0_OUT_DATA_PHASE; | |
1863 | ||
1864 | i = dev->driver->setup(&dev->gadget, &u.r); | |
1865 | if (i < 0) { | |
1866 | /* hardware automagic preventing STALL... */ | |
1867 | if (dev->req_config) { | |
1868 | /* hardware sometimes neglects to tell | |
1869 | * tell us about config change events, | |
1870 | * so later ones may fail... | |
1871 | */ | |
1872 | WARN("config change %02x fail %d?\n", | |
1873 | u.r.bRequest, i); | |
1874 | return; | |
1875 | /* TODO experiment: if has_cfr, | |
1876 | * hardware didn't ACK; maybe we | |
1877 | * could actually STALL! | |
1878 | */ | |
1879 | } | |
1880 | DBG(DBG_VERBOSE, "protocol STALL, " | |
1881 | "%02x err %d\n", UDCCS0, i); | |
1882 | stall: | |
1883 | /* the watchdog timer helps deal with cases | |
1884 | * where udc seems to clear FST wrongly, and | |
1885 | * then NAKs instead of STALLing. | |
1886 | */ | |
1887 | ep0start(dev, UDCCS0_FST|UDCCS0_FTF, "stall"); | |
1888 | start_watchdog(dev); | |
1889 | dev->ep0state = EP0_STALL; | |
1890 | ||
1891 | /* deferred i/o == no response yet */ | |
1892 | } else if (dev->req_pending) { | |
1893 | if (likely(dev->ep0state == EP0_IN_DATA_PHASE | |
1894 | || dev->req_std || u.r.wLength)) | |
1895 | ep0start(dev, 0, "defer"); | |
1896 | else | |
1897 | ep0start(dev, UDCCS0_IPR, "defer/IPR"); | |
1898 | } | |
1899 | ||
1900 | /* expect at least one data or status stage irq */ | |
1901 | return; | |
1902 | ||
1903 | } else if (likely((udccs0 & (UDCCS0_OPR|UDCCS0_SA)) | |
1904 | == (UDCCS0_OPR|UDCCS0_SA))) { | |
1905 | unsigned i; | |
1906 | ||
1907 | /* pxa210/250 erratum 131 for B0/B1 says RNE lies. | |
1908 | * still observed on a pxa255 a0. | |
1909 | */ | |
1910 | DBG(DBG_VERBOSE, "e131\n"); | |
1911 | nuke(ep, -EPROTO); | |
1912 | ||
1913 | /* read SETUP data, but don't trust it too much */ | |
1914 | for (i = 0; i < 8; i++) | |
1915 | u.raw [i] = (u8) UDDR0; | |
1916 | if ((u.r.bRequestType & USB_RECIP_MASK) | |
1917 | > USB_RECIP_OTHER) | |
1918 | goto stall; | |
1919 | if (u.word [0] == 0 && u.word [1] == 0) | |
1920 | goto stall; | |
1921 | goto got_setup; | |
1922 | } else { | |
1923 | /* some random early IRQ: | |
1924 | * - we acked FST | |
1925 | * - IPR cleared | |
1926 | * - OPR got set, without SA (likely status stage) | |
1927 | */ | |
1928 | UDCCS0 = udccs0 & (UDCCS0_SA|UDCCS0_OPR); | |
1929 | } | |
1930 | break; | |
1931 | case EP0_IN_DATA_PHASE: /* GET_DESCRIPTOR etc */ | |
1932 | if (udccs0 & UDCCS0_OPR) { | |
1933 | UDCCS0 = UDCCS0_OPR|UDCCS0_FTF; | |
1934 | DBG(DBG_VERBOSE, "ep0in premature status\n"); | |
1935 | if (req) | |
1936 | done(ep, req, 0); | |
1937 | ep0_idle(dev); | |
1938 | } else /* irq was IPR clearing */ { | |
1939 | if (req) { | |
1940 | /* this IN packet might finish the request */ | |
1941 | (void) write_ep0_fifo(ep, req); | |
1942 | } /* else IN token before response was written */ | |
1943 | } | |
1944 | break; | |
1945 | case EP0_OUT_DATA_PHASE: /* SET_DESCRIPTOR etc */ | |
1946 | if (udccs0 & UDCCS0_OPR) { | |
1947 | if (req) { | |
1948 | /* this OUT packet might finish the request */ | |
1949 | if (read_ep0_fifo(ep, req)) | |
1950 | done(ep, req, 0); | |
1951 | /* else more OUT packets expected */ | |
1952 | } /* else OUT token before read was issued */ | |
1953 | } else /* irq was IPR clearing */ { | |
1954 | DBG(DBG_VERBOSE, "ep0out premature status\n"); | |
1955 | if (req) | |
1956 | done(ep, req, 0); | |
1957 | ep0_idle(dev); | |
1958 | } | |
1959 | break; | |
1960 | case EP0_END_XFER: | |
1961 | if (req) | |
1962 | done(ep, req, 0); | |
1963 | /* ack control-IN status (maybe in-zlp was skipped) | |
1964 | * also appears after some config change events. | |
1965 | */ | |
1966 | if (udccs0 & UDCCS0_OPR) | |
1967 | UDCCS0 = UDCCS0_OPR; | |
1968 | ep0_idle(dev); | |
1969 | break; | |
1970 | case EP0_STALL: | |
1971 | UDCCS0 = UDCCS0_FST; | |
1972 | break; | |
1973 | } | |
1974 | USIR0 = USIR0_IR0; | |
1975 | } | |
1976 | ||
1977 | static void handle_ep(struct pxa2xx_ep *ep) | |
1978 | { | |
1979 | struct pxa2xx_request *req; | |
1980 | int is_in = ep->bEndpointAddress & USB_DIR_IN; | |
1981 | int completed; | |
1982 | u32 udccs, tmp; | |
1983 | ||
1984 | do { | |
1985 | completed = 0; | |
1986 | if (likely (!list_empty(&ep->queue))) | |
1987 | req = list_entry(ep->queue.next, | |
1988 | struct pxa2xx_request, queue); | |
1989 | else | |
1990 | req = NULL; | |
1991 | ||
1992 | // TODO check FST handling | |
1993 | ||
1994 | udccs = *ep->reg_udccs; | |
1995 | if (unlikely(is_in)) { /* irq from TPC, SST, or (ISO) TUR */ | |
1996 | tmp = UDCCS_BI_TUR; | |
1997 | if (likely(ep->bmAttributes == USB_ENDPOINT_XFER_BULK)) | |
1998 | tmp |= UDCCS_BI_SST; | |
1999 | tmp &= udccs; | |
2000 | if (likely (tmp)) | |
2001 | *ep->reg_udccs = tmp; | |
2002 | if (req && likely ((udccs & UDCCS_BI_TFS) != 0)) | |
2003 | completed = write_fifo(ep, req); | |
2004 | ||
2005 | } else { /* irq from RPC (or for ISO, ROF) */ | |
2006 | if (likely(ep->bmAttributes == USB_ENDPOINT_XFER_BULK)) | |
2007 | tmp = UDCCS_BO_SST | UDCCS_BO_DME; | |
2008 | else | |
2009 | tmp = UDCCS_IO_ROF | UDCCS_IO_DME; | |
2010 | tmp &= udccs; | |
2011 | if (likely(tmp)) | |
2012 | *ep->reg_udccs = tmp; | |
2013 | ||
2014 | /* fifos can hold packets, ready for reading... */ | |
2015 | if (likely(req)) { | |
2016 | #ifdef USE_OUT_DMA | |
2017 | // TODO didn't yet debug out-dma. this approach assumes | |
2018 | // the worst about short packets and RPC; it might be better. | |
2019 | ||
2020 | if (likely(ep->dma >= 0)) { | |
2021 | if (!(udccs & UDCCS_BO_RSP)) { | |
2022 | *ep->reg_udccs = UDCCS_BO_RPC; | |
2023 | ep->dma_irqs++; | |
2024 | return; | |
2025 | } | |
2026 | } | |
2027 | #endif | |
2028 | completed = read_fifo(ep, req); | |
2029 | } else | |
2030 | pio_irq_disable (ep->bEndpointAddress); | |
2031 | } | |
2032 | ep->pio_irqs++; | |
2033 | } while (completed); | |
2034 | } | |
2035 | ||
2036 | /* | |
2037 | * pxa2xx_udc_irq - interrupt handler | |
2038 | * | |
2039 | * avoid delays in ep0 processing. the control handshaking isn't always | |
2040 | * under software control (pxa250c0 and the pxa255 are better), and delays | |
2041 | * could cause usb protocol errors. | |
2042 | */ | |
2043 | static irqreturn_t | |
2044 | pxa2xx_udc_irq(int irq, void *_dev, struct pt_regs *r) | |
2045 | { | |
2046 | struct pxa2xx_udc *dev = _dev; | |
2047 | int handled; | |
2048 | ||
2049 | dev->stats.irqs++; | |
2050 | HEX_DISPLAY(dev->stats.irqs); | |
2051 | do { | |
2052 | u32 udccr = UDCCR; | |
2053 | ||
2054 | handled = 0; | |
2055 | ||
2056 | /* SUSpend Interrupt Request */ | |
2057 | if (unlikely(udccr & UDCCR_SUSIR)) { | |
2058 | udc_ack_int_UDCCR(UDCCR_SUSIR); | |
2059 | handled = 1; | |
91987693 | 2060 | DBG(DBG_VERBOSE, "USB suspend%s\n", is_vbus_present() |
1da177e4 LT |
2061 | ? "" : "+disconnect"); |
2062 | ||
91987693 | 2063 | if (!is_vbus_present()) |
1da177e4 LT |
2064 | stop_activity(dev, dev->driver); |
2065 | else if (dev->gadget.speed != USB_SPEED_UNKNOWN | |
2066 | && dev->driver | |
2067 | && dev->driver->suspend) | |
2068 | dev->driver->suspend(&dev->gadget); | |
2069 | ep0_idle (dev); | |
2070 | } | |
2071 | ||
2072 | /* RESume Interrupt Request */ | |
2073 | if (unlikely(udccr & UDCCR_RESIR)) { | |
2074 | udc_ack_int_UDCCR(UDCCR_RESIR); | |
2075 | handled = 1; | |
2076 | DBG(DBG_VERBOSE, "USB resume\n"); | |
2077 | ||
2078 | if (dev->gadget.speed != USB_SPEED_UNKNOWN | |
2079 | && dev->driver | |
2080 | && dev->driver->resume | |
91987693 | 2081 | && is_vbus_present()) |
1da177e4 LT |
2082 | dev->driver->resume(&dev->gadget); |
2083 | } | |
2084 | ||
2085 | /* ReSeT Interrupt Request - USB reset */ | |
2086 | if (unlikely(udccr & UDCCR_RSTIR)) { | |
2087 | udc_ack_int_UDCCR(UDCCR_RSTIR); | |
2088 | handled = 1; | |
2089 | ||
2090 | if ((UDCCR & UDCCR_UDA) == 0) { | |
2091 | DBG(DBG_VERBOSE, "USB reset start\n"); | |
2092 | ||
2093 | /* reset driver and endpoints, | |
2094 | * in case that's not yet done | |
2095 | */ | |
2096 | stop_activity (dev, dev->driver); | |
2097 | ||
2098 | } else { | |
2099 | DBG(DBG_VERBOSE, "USB reset end\n"); | |
2100 | dev->gadget.speed = USB_SPEED_FULL; | |
2101 | LED_CONNECTED_ON; | |
2102 | memset(&dev->stats, 0, sizeof dev->stats); | |
2103 | /* driver and endpoints are still reset */ | |
2104 | } | |
2105 | ||
2106 | } else { | |
2107 | u32 usir0 = USIR0 & ~UICR0; | |
2108 | u32 usir1 = USIR1 & ~UICR1; | |
2109 | int i; | |
2110 | ||
2111 | if (unlikely (!usir0 && !usir1)) | |
2112 | continue; | |
2113 | ||
2114 | DBG(DBG_VERY_NOISY, "irq %02x.%02x\n", usir1, usir0); | |
2115 | ||
2116 | /* control traffic */ | |
2117 | if (usir0 & USIR0_IR0) { | |
2118 | dev->ep[0].pio_irqs++; | |
2119 | handle_ep0(dev); | |
2120 | handled = 1; | |
2121 | } | |
2122 | ||
2123 | /* endpoint data transfers */ | |
2124 | for (i = 0; i < 8; i++) { | |
2125 | u32 tmp = 1 << i; | |
2126 | ||
2127 | if (i && (usir0 & tmp)) { | |
2128 | handle_ep(&dev->ep[i]); | |
2129 | USIR0 |= tmp; | |
2130 | handled = 1; | |
2131 | } | |
2132 | if (usir1 & tmp) { | |
2133 | handle_ep(&dev->ep[i+8]); | |
2134 | USIR1 |= tmp; | |
2135 | handled = 1; | |
2136 | } | |
2137 | } | |
2138 | } | |
2139 | ||
2140 | /* we could also ask for 1 msec SOF (SIR) interrupts */ | |
2141 | ||
2142 | } while (handled); | |
2143 | return IRQ_HANDLED; | |
2144 | } | |
2145 | ||
2146 | /*-------------------------------------------------------------------------*/ | |
2147 | ||
2148 | static void nop_release (struct device *dev) | |
2149 | { | |
2150 | DMSG("%s %s\n", __FUNCTION__, dev->bus_id); | |
2151 | } | |
2152 | ||
2153 | /* this uses load-time allocation and initialization (instead of | |
2154 | * doing it at run-time) to save code, eliminate fault paths, and | |
2155 | * be more obviously correct. | |
2156 | */ | |
2157 | static struct pxa2xx_udc memory = { | |
2158 | .gadget = { | |
2159 | .ops = &pxa2xx_udc_ops, | |
2160 | .ep0 = &memory.ep[0].ep, | |
2161 | .name = driver_name, | |
2162 | .dev = { | |
2163 | .bus_id = "gadget", | |
2164 | .release = nop_release, | |
2165 | }, | |
2166 | }, | |
2167 | ||
2168 | /* control endpoint */ | |
2169 | .ep[0] = { | |
2170 | .ep = { | |
2171 | .name = ep0name, | |
2172 | .ops = &pxa2xx_ep_ops, | |
2173 | .maxpacket = EP0_FIFO_SIZE, | |
2174 | }, | |
2175 | .dev = &memory, | |
2176 | .reg_udccs = &UDCCS0, | |
2177 | .reg_uddr = &UDDR0, | |
2178 | }, | |
2179 | ||
2180 | /* first group of endpoints */ | |
2181 | .ep[1] = { | |
2182 | .ep = { | |
2183 | .name = "ep1in-bulk", | |
2184 | .ops = &pxa2xx_ep_ops, | |
2185 | .maxpacket = BULK_FIFO_SIZE, | |
2186 | }, | |
2187 | .dev = &memory, | |
2188 | .fifo_size = BULK_FIFO_SIZE, | |
2189 | .bEndpointAddress = USB_DIR_IN | 1, | |
2190 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
2191 | .reg_udccs = &UDCCS1, | |
2192 | .reg_uddr = &UDDR1, | |
2193 | drcmr (25) | |
2194 | }, | |
2195 | .ep[2] = { | |
2196 | .ep = { | |
2197 | .name = "ep2out-bulk", | |
2198 | .ops = &pxa2xx_ep_ops, | |
2199 | .maxpacket = BULK_FIFO_SIZE, | |
2200 | }, | |
2201 | .dev = &memory, | |
2202 | .fifo_size = BULK_FIFO_SIZE, | |
2203 | .bEndpointAddress = 2, | |
2204 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
2205 | .reg_udccs = &UDCCS2, | |
2206 | .reg_ubcr = &UBCR2, | |
2207 | .reg_uddr = &UDDR2, | |
2208 | drcmr (26) | |
2209 | }, | |
2210 | #ifndef CONFIG_USB_PXA2XX_SMALL | |
2211 | .ep[3] = { | |
2212 | .ep = { | |
2213 | .name = "ep3in-iso", | |
2214 | .ops = &pxa2xx_ep_ops, | |
2215 | .maxpacket = ISO_FIFO_SIZE, | |
2216 | }, | |
2217 | .dev = &memory, | |
2218 | .fifo_size = ISO_FIFO_SIZE, | |
2219 | .bEndpointAddress = USB_DIR_IN | 3, | |
2220 | .bmAttributes = USB_ENDPOINT_XFER_ISOC, | |
2221 | .reg_udccs = &UDCCS3, | |
2222 | .reg_uddr = &UDDR3, | |
2223 | drcmr (27) | |
2224 | }, | |
2225 | .ep[4] = { | |
2226 | .ep = { | |
2227 | .name = "ep4out-iso", | |
2228 | .ops = &pxa2xx_ep_ops, | |
2229 | .maxpacket = ISO_FIFO_SIZE, | |
2230 | }, | |
2231 | .dev = &memory, | |
2232 | .fifo_size = ISO_FIFO_SIZE, | |
2233 | .bEndpointAddress = 4, | |
2234 | .bmAttributes = USB_ENDPOINT_XFER_ISOC, | |
2235 | .reg_udccs = &UDCCS4, | |
2236 | .reg_ubcr = &UBCR4, | |
2237 | .reg_uddr = &UDDR4, | |
2238 | drcmr (28) | |
2239 | }, | |
2240 | .ep[5] = { | |
2241 | .ep = { | |
2242 | .name = "ep5in-int", | |
2243 | .ops = &pxa2xx_ep_ops, | |
2244 | .maxpacket = INT_FIFO_SIZE, | |
2245 | }, | |
2246 | .dev = &memory, | |
2247 | .fifo_size = INT_FIFO_SIZE, | |
2248 | .bEndpointAddress = USB_DIR_IN | 5, | |
2249 | .bmAttributes = USB_ENDPOINT_XFER_INT, | |
2250 | .reg_udccs = &UDCCS5, | |
2251 | .reg_uddr = &UDDR5, | |
2252 | }, | |
2253 | ||
2254 | /* second group of endpoints */ | |
2255 | .ep[6] = { | |
2256 | .ep = { | |
2257 | .name = "ep6in-bulk", | |
2258 | .ops = &pxa2xx_ep_ops, | |
2259 | .maxpacket = BULK_FIFO_SIZE, | |
2260 | }, | |
2261 | .dev = &memory, | |
2262 | .fifo_size = BULK_FIFO_SIZE, | |
2263 | .bEndpointAddress = USB_DIR_IN | 6, | |
2264 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
2265 | .reg_udccs = &UDCCS6, | |
2266 | .reg_uddr = &UDDR6, | |
2267 | drcmr (30) | |
2268 | }, | |
2269 | .ep[7] = { | |
2270 | .ep = { | |
2271 | .name = "ep7out-bulk", | |
2272 | .ops = &pxa2xx_ep_ops, | |
2273 | .maxpacket = BULK_FIFO_SIZE, | |
2274 | }, | |
2275 | .dev = &memory, | |
2276 | .fifo_size = BULK_FIFO_SIZE, | |
2277 | .bEndpointAddress = 7, | |
2278 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
2279 | .reg_udccs = &UDCCS7, | |
2280 | .reg_ubcr = &UBCR7, | |
2281 | .reg_uddr = &UDDR7, | |
2282 | drcmr (31) | |
2283 | }, | |
2284 | .ep[8] = { | |
2285 | .ep = { | |
2286 | .name = "ep8in-iso", | |
2287 | .ops = &pxa2xx_ep_ops, | |
2288 | .maxpacket = ISO_FIFO_SIZE, | |
2289 | }, | |
2290 | .dev = &memory, | |
2291 | .fifo_size = ISO_FIFO_SIZE, | |
2292 | .bEndpointAddress = USB_DIR_IN | 8, | |
2293 | .bmAttributes = USB_ENDPOINT_XFER_ISOC, | |
2294 | .reg_udccs = &UDCCS8, | |
2295 | .reg_uddr = &UDDR8, | |
2296 | drcmr (32) | |
2297 | }, | |
2298 | .ep[9] = { | |
2299 | .ep = { | |
2300 | .name = "ep9out-iso", | |
2301 | .ops = &pxa2xx_ep_ops, | |
2302 | .maxpacket = ISO_FIFO_SIZE, | |
2303 | }, | |
2304 | .dev = &memory, | |
2305 | .fifo_size = ISO_FIFO_SIZE, | |
2306 | .bEndpointAddress = 9, | |
2307 | .bmAttributes = USB_ENDPOINT_XFER_ISOC, | |
2308 | .reg_udccs = &UDCCS9, | |
2309 | .reg_ubcr = &UBCR9, | |
2310 | .reg_uddr = &UDDR9, | |
2311 | drcmr (33) | |
2312 | }, | |
2313 | .ep[10] = { | |
2314 | .ep = { | |
2315 | .name = "ep10in-int", | |
2316 | .ops = &pxa2xx_ep_ops, | |
2317 | .maxpacket = INT_FIFO_SIZE, | |
2318 | }, | |
2319 | .dev = &memory, | |
2320 | .fifo_size = INT_FIFO_SIZE, | |
2321 | .bEndpointAddress = USB_DIR_IN | 10, | |
2322 | .bmAttributes = USB_ENDPOINT_XFER_INT, | |
2323 | .reg_udccs = &UDCCS10, | |
2324 | .reg_uddr = &UDDR10, | |
2325 | }, | |
2326 | ||
2327 | /* third group of endpoints */ | |
2328 | .ep[11] = { | |
2329 | .ep = { | |
2330 | .name = "ep11in-bulk", | |
2331 | .ops = &pxa2xx_ep_ops, | |
2332 | .maxpacket = BULK_FIFO_SIZE, | |
2333 | }, | |
2334 | .dev = &memory, | |
2335 | .fifo_size = BULK_FIFO_SIZE, | |
2336 | .bEndpointAddress = USB_DIR_IN | 11, | |
2337 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
2338 | .reg_udccs = &UDCCS11, | |
2339 | .reg_uddr = &UDDR11, | |
2340 | drcmr (35) | |
2341 | }, | |
2342 | .ep[12] = { | |
2343 | .ep = { | |
2344 | .name = "ep12out-bulk", | |
2345 | .ops = &pxa2xx_ep_ops, | |
2346 | .maxpacket = BULK_FIFO_SIZE, | |
2347 | }, | |
2348 | .dev = &memory, | |
2349 | .fifo_size = BULK_FIFO_SIZE, | |
2350 | .bEndpointAddress = 12, | |
2351 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
2352 | .reg_udccs = &UDCCS12, | |
2353 | .reg_ubcr = &UBCR12, | |
2354 | .reg_uddr = &UDDR12, | |
2355 | drcmr (36) | |
2356 | }, | |
2357 | .ep[13] = { | |
2358 | .ep = { | |
2359 | .name = "ep13in-iso", | |
2360 | .ops = &pxa2xx_ep_ops, | |
2361 | .maxpacket = ISO_FIFO_SIZE, | |
2362 | }, | |
2363 | .dev = &memory, | |
2364 | .fifo_size = ISO_FIFO_SIZE, | |
2365 | .bEndpointAddress = USB_DIR_IN | 13, | |
2366 | .bmAttributes = USB_ENDPOINT_XFER_ISOC, | |
2367 | .reg_udccs = &UDCCS13, | |
2368 | .reg_uddr = &UDDR13, | |
2369 | drcmr (37) | |
2370 | }, | |
2371 | .ep[14] = { | |
2372 | .ep = { | |
2373 | .name = "ep14out-iso", | |
2374 | .ops = &pxa2xx_ep_ops, | |
2375 | .maxpacket = ISO_FIFO_SIZE, | |
2376 | }, | |
2377 | .dev = &memory, | |
2378 | .fifo_size = ISO_FIFO_SIZE, | |
2379 | .bEndpointAddress = 14, | |
2380 | .bmAttributes = USB_ENDPOINT_XFER_ISOC, | |
2381 | .reg_udccs = &UDCCS14, | |
2382 | .reg_ubcr = &UBCR14, | |
2383 | .reg_uddr = &UDDR14, | |
2384 | drcmr (38) | |
2385 | }, | |
2386 | .ep[15] = { | |
2387 | .ep = { | |
2388 | .name = "ep15in-int", | |
2389 | .ops = &pxa2xx_ep_ops, | |
2390 | .maxpacket = INT_FIFO_SIZE, | |
2391 | }, | |
2392 | .dev = &memory, | |
2393 | .fifo_size = INT_FIFO_SIZE, | |
2394 | .bEndpointAddress = USB_DIR_IN | 15, | |
2395 | .bmAttributes = USB_ENDPOINT_XFER_INT, | |
2396 | .reg_udccs = &UDCCS15, | |
2397 | .reg_uddr = &UDDR15, | |
2398 | }, | |
2399 | #endif /* !CONFIG_USB_PXA2XX_SMALL */ | |
2400 | }; | |
2401 | ||
2402 | #define CP15R0_VENDOR_MASK 0xffffe000 | |
2403 | ||
2404 | #if defined(CONFIG_ARCH_PXA) | |
2405 | #define CP15R0_XSCALE_VALUE 0x69052000 /* intel/arm/xscale */ | |
2406 | ||
2407 | #elif defined(CONFIG_ARCH_IXP4XX) | |
2408 | #define CP15R0_XSCALE_VALUE 0x69054000 /* intel/arm/ixp4xx */ | |
2409 | ||
2410 | #endif | |
2411 | ||
2412 | #define CP15R0_PROD_MASK 0x000003f0 | |
2413 | #define PXA25x 0x00000100 /* and PXA26x */ | |
2414 | #define PXA210 0x00000120 | |
2415 | ||
2416 | #define CP15R0_REV_MASK 0x0000000f | |
2417 | ||
2418 | #define CP15R0_PRODREV_MASK (CP15R0_PROD_MASK | CP15R0_REV_MASK) | |
2419 | ||
2420 | #define PXA255_A0 0x00000106 /* or PXA260_B1 */ | |
2421 | #define PXA250_C0 0x00000105 /* or PXA26x_B0 */ | |
2422 | #define PXA250_B2 0x00000104 | |
2423 | #define PXA250_B1 0x00000103 /* or PXA260_A0 */ | |
2424 | #define PXA250_B0 0x00000102 | |
2425 | #define PXA250_A1 0x00000101 | |
2426 | #define PXA250_A0 0x00000100 | |
2427 | ||
2428 | #define PXA210_C0 0x00000125 | |
2429 | #define PXA210_B2 0x00000124 | |
2430 | #define PXA210_B1 0x00000123 | |
2431 | #define PXA210_B0 0x00000122 | |
2432 | #define IXP425_A0 0x000001c1 | |
043ea18b | 2433 | #define IXP465_AD 0x00000200 |
1da177e4 LT |
2434 | |
2435 | /* | |
2436 | * probe - binds to the platform device | |
2437 | */ | |
3ae5eaec | 2438 | static int __init pxa2xx_udc_probe(struct platform_device *pdev) |
1da177e4 LT |
2439 | { |
2440 | struct pxa2xx_udc *dev = &memory; | |
2441 | int retval, out_dma = 1; | |
2442 | u32 chiprev; | |
2443 | ||
2444 | /* insist on Intel/ARM/XScale */ | |
2445 | asm("mrc%? p15, 0, %0, c0, c0" : "=r" (chiprev)); | |
2446 | if ((chiprev & CP15R0_VENDOR_MASK) != CP15R0_XSCALE_VALUE) { | |
2447 | printk(KERN_ERR "%s: not XScale!\n", driver_name); | |
2448 | return -ENODEV; | |
2449 | } | |
2450 | ||
2451 | /* trigger chiprev-specific logic */ | |
2452 | switch (chiprev & CP15R0_PRODREV_MASK) { | |
2453 | #if defined(CONFIG_ARCH_PXA) | |
2454 | case PXA255_A0: | |
2455 | dev->has_cfr = 1; | |
2456 | break; | |
2457 | case PXA250_A0: | |
2458 | case PXA250_A1: | |
2459 | /* A0/A1 "not released"; ep 13, 15 unusable */ | |
2460 | /* fall through */ | |
2461 | case PXA250_B2: case PXA210_B2: | |
2462 | case PXA250_B1: case PXA210_B1: | |
2463 | case PXA250_B0: case PXA210_B0: | |
2464 | out_dma = 0; | |
2465 | /* fall through */ | |
2466 | case PXA250_C0: case PXA210_C0: | |
2467 | break; | |
2468 | #elif defined(CONFIG_ARCH_IXP4XX) | |
2469 | case IXP425_A0: | |
043ea18b MS |
2470 | case IXP465_AD: |
2471 | dev->has_cfr = 1; | |
1da177e4 LT |
2472 | out_dma = 0; |
2473 | break; | |
2474 | #endif | |
2475 | default: | |
2476 | out_dma = 0; | |
2477 | printk(KERN_ERR "%s: unrecognized processor: %08x\n", | |
2478 | driver_name, chiprev); | |
2479 | /* iop3xx, ixp4xx, ... */ | |
2480 | return -ENODEV; | |
2481 | } | |
2482 | ||
2483 | pr_debug("%s: IRQ %d%s%s%s\n", driver_name, IRQ_USB, | |
2484 | dev->has_cfr ? "" : " (!cfr)", | |
2485 | out_dma ? "" : " (broken dma-out)", | |
2486 | SIZE_STR DMASTR | |
2487 | ); | |
2488 | ||
2489 | #ifdef USE_DMA | |
2490 | #ifndef USE_OUT_DMA | |
2491 | out_dma = 0; | |
2492 | #endif | |
2493 | /* pxa 250 erratum 130 prevents using OUT dma (fixed C0) */ | |
2494 | if (!out_dma) { | |
2495 | DMSG("disabled OUT dma\n"); | |
2496 | dev->ep[ 2].reg_drcmr = dev->ep[ 4].reg_drcmr = 0; | |
2497 | dev->ep[ 7].reg_drcmr = dev->ep[ 9].reg_drcmr = 0; | |
2498 | dev->ep[12].reg_drcmr = dev->ep[14].reg_drcmr = 0; | |
2499 | } | |
2500 | #endif | |
2501 | ||
2502 | /* other non-static parts of init */ | |
3ae5eaec RK |
2503 | dev->dev = &pdev->dev; |
2504 | dev->mach = pdev->dev.platform_data; | |
1da177e4 LT |
2505 | |
2506 | init_timer(&dev->timer); | |
2507 | dev->timer.function = udc_watchdog; | |
2508 | dev->timer.data = (unsigned long) dev; | |
2509 | ||
2510 | device_initialize(&dev->gadget.dev); | |
3ae5eaec RK |
2511 | dev->gadget.dev.parent = &pdev->dev; |
2512 | dev->gadget.dev.dma_mask = pdev->dev.dma_mask; | |
1da177e4 LT |
2513 | |
2514 | the_controller = dev; | |
3ae5eaec | 2515 | platform_set_drvdata(pdev, dev); |
1da177e4 LT |
2516 | |
2517 | udc_disable(dev); | |
2518 | udc_reinit(dev); | |
2519 | ||
91987693 | 2520 | dev->vbus = is_vbus_present(); |
1da177e4 LT |
2521 | |
2522 | /* irq setup after old hardware state is cleaned up */ | |
2523 | retval = request_irq(IRQ_USB, pxa2xx_udc_irq, | |
d54b5caa | 2524 | IRQF_DISABLED, driver_name, dev); |
1da177e4 LT |
2525 | if (retval != 0) { |
2526 | printk(KERN_ERR "%s: can't get irq %i, err %d\n", | |
2527 | driver_name, IRQ_USB, retval); | |
2528 | return -EBUSY; | |
2529 | } | |
2530 | dev->got_irq = 1; | |
2531 | ||
2532 | #ifdef CONFIG_ARCH_LUBBOCK | |
2533 | if (machine_is_lubbock()) { | |
2534 | retval = request_irq(LUBBOCK_USB_DISC_IRQ, | |
2535 | lubbock_vbus_irq, | |
d54b5caa | 2536 | IRQF_DISABLED | IRQF_SAMPLE_RANDOM, |
1da177e4 LT |
2537 | driver_name, dev); |
2538 | if (retval != 0) { | |
2539 | printk(KERN_ERR "%s: can't get irq %i, err %d\n", | |
2540 | driver_name, LUBBOCK_USB_DISC_IRQ, retval); | |
2541 | lubbock_fail0: | |
2542 | free_irq(IRQ_USB, dev); | |
2543 | return -EBUSY; | |
2544 | } | |
2545 | retval = request_irq(LUBBOCK_USB_IRQ, | |
2546 | lubbock_vbus_irq, | |
d54b5caa | 2547 | IRQF_DISABLED | IRQF_SAMPLE_RANDOM, |
1da177e4 LT |
2548 | driver_name, dev); |
2549 | if (retval != 0) { | |
2550 | printk(KERN_ERR "%s: can't get irq %i, err %d\n", | |
2551 | driver_name, LUBBOCK_USB_IRQ, retval); | |
2552 | free_irq(LUBBOCK_USB_DISC_IRQ, dev); | |
2553 | goto lubbock_fail0; | |
2554 | } | |
2555 | #ifdef DEBUG | |
2556 | /* with U-Boot (but not BLOB), hex is off by default */ | |
2557 | HEX_DISPLAY(dev->stats.irqs); | |
2558 | LUB_DISC_BLNK_LED &= 0xff; | |
2559 | #endif | |
2560 | } | |
2561 | #endif | |
2562 | create_proc_files(); | |
2563 | ||
2564 | return 0; | |
2565 | } | |
91987693 | 2566 | |
3ae5eaec | 2567 | static void pxa2xx_udc_shutdown(struct platform_device *_dev) |
91987693 DB |
2568 | { |
2569 | pullup_off(); | |
2570 | } | |
2571 | ||
3ae5eaec | 2572 | static int __exit pxa2xx_udc_remove(struct platform_device *pdev) |
1da177e4 | 2573 | { |
3ae5eaec | 2574 | struct pxa2xx_udc *dev = platform_get_drvdata(pdev); |
1da177e4 LT |
2575 | |
2576 | udc_disable(dev); | |
2577 | remove_proc_files(); | |
2578 | usb_gadget_unregister_driver(dev->driver); | |
2579 | ||
2580 | if (dev->got_irq) { | |
2581 | free_irq(IRQ_USB, dev); | |
2582 | dev->got_irq = 0; | |
2583 | } | |
44df45a0 | 2584 | #ifdef CONFIG_ARCH_LUBBOCK |
1da177e4 LT |
2585 | if (machine_is_lubbock()) { |
2586 | free_irq(LUBBOCK_USB_DISC_IRQ, dev); | |
2587 | free_irq(LUBBOCK_USB_IRQ, dev); | |
2588 | } | |
44df45a0 | 2589 | #endif |
3ae5eaec | 2590 | platform_set_drvdata(pdev, NULL); |
1da177e4 LT |
2591 | the_controller = NULL; |
2592 | return 0; | |
2593 | } | |
2594 | ||
2595 | /*-------------------------------------------------------------------------*/ | |
2596 | ||
2597 | #ifdef CONFIG_PM | |
2598 | ||
2599 | /* USB suspend (controlled by the host) and system suspend (controlled | |
2600 | * by the PXA) don't necessarily work well together. If USB is active, | |
2601 | * the 48 MHz clock is required; so the system can't enter 33 MHz idle | |
2602 | * mode, or any deeper PM saving state. | |
2603 | * | |
2604 | * For now, we punt and forcibly disconnect from the USB host when PXA | |
2605 | * enters any suspend state. While we're disconnected, we always disable | |
2606 | * the 48MHz USB clock ... allowing PXA sleep and/or 33 MHz idle states. | |
2607 | * Boards without software pullup control shouldn't use those states. | |
2608 | * VBUS IRQs should probably be ignored so that the PXA device just acts | |
2609 | * "dead" to USB hosts until system resume. | |
2610 | */ | |
3ae5eaec | 2611 | static int pxa2xx_udc_suspend(struct platform_device *dev, pm_message_t state) |
1da177e4 | 2612 | { |
3ae5eaec | 2613 | struct pxa2xx_udc *udc = platform_get_drvdata(dev); |
1da177e4 | 2614 | |
9480e307 RK |
2615 | if (!udc->mach->udc_command) |
2616 | WARN("USB host won't detect disconnect!\n"); | |
2617 | pullup(udc, 0); | |
2618 | ||
1da177e4 LT |
2619 | return 0; |
2620 | } | |
2621 | ||
3ae5eaec | 2622 | static int pxa2xx_udc_resume(struct platform_device *dev) |
1da177e4 | 2623 | { |
3ae5eaec | 2624 | struct pxa2xx_udc *udc = platform_get_drvdata(dev); |
1da177e4 | 2625 | |
9480e307 RK |
2626 | pullup(udc, 1); |
2627 | ||
1da177e4 LT |
2628 | return 0; |
2629 | } | |
2630 | ||
2631 | #else | |
2632 | #define pxa2xx_udc_suspend NULL | |
2633 | #define pxa2xx_udc_resume NULL | |
2634 | #endif | |
2635 | ||
2636 | /*-------------------------------------------------------------------------*/ | |
2637 | ||
3ae5eaec | 2638 | static struct platform_driver udc_driver = { |
1da177e4 | 2639 | .probe = pxa2xx_udc_probe, |
91987693 | 2640 | .shutdown = pxa2xx_udc_shutdown, |
1da177e4 LT |
2641 | .remove = __exit_p(pxa2xx_udc_remove), |
2642 | .suspend = pxa2xx_udc_suspend, | |
2643 | .resume = pxa2xx_udc_resume, | |
3ae5eaec RK |
2644 | .driver = { |
2645 | .owner = THIS_MODULE, | |
2646 | .name = "pxa2xx-udc", | |
2647 | }, | |
1da177e4 LT |
2648 | }; |
2649 | ||
2650 | static int __init udc_init(void) | |
2651 | { | |
2652 | printk(KERN_INFO "%s: version %s\n", driver_name, DRIVER_VERSION); | |
3ae5eaec | 2653 | return platform_driver_register(&udc_driver); |
1da177e4 LT |
2654 | } |
2655 | module_init(udc_init); | |
2656 | ||
2657 | static void __exit udc_exit(void) | |
2658 | { | |
3ae5eaec | 2659 | platform_driver_unregister(&udc_driver); |
1da177e4 LT |
2660 | } |
2661 | module_exit(udc_exit); | |
2662 | ||
2663 | MODULE_DESCRIPTION(DRIVER_DESC); | |
2664 | MODULE_AUTHOR("Frank Becker, Robert Schwebel, David Brownell"); | |
2665 | MODULE_LICENSE("GPL"); | |
2666 |