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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * f_sourcesink.c - USB peripheral source/sink configuration driver
4 *
5 * Copyright (C) 2003-2008 David Brownell
6 * Copyright (C) 2008 by Nokia Corporation
7 */
8
9/* #define VERBOSE_DEBUG */
10
11#include <linux/slab.h>
12#include <linux/kernel.h>
13#include <linux/device.h>
14#include <linux/module.h>
15#include <linux/usb/composite.h>
16#include <linux/err.h>
17
18#include "g_zero.h"
19#include "u_f.h"
20
21/*
22 * SOURCE/SINK FUNCTION ... a primary testing vehicle for USB peripheral
23 * controller drivers.
24 *
25 * This just sinks bulk packets OUT to the peripheral and sources them IN
26 * to the host, optionally with specific data patterns for integrity tests.
27 * As such it supports basic functionality and load tests.
28 *
29 * In terms of control messaging, this supports all the standard requests
30 * plus two that support control-OUT tests. If the optional "autoresume"
31 * mode is enabled, it provides good functional coverage for the "USBCV"
32 * test harness from USB-IF.
33 */
34struct f_sourcesink {
35 struct usb_function function;
36
37 struct usb_ep *in_ep;
38 struct usb_ep *out_ep;
39 struct usb_ep *iso_in_ep;
40 struct usb_ep *iso_out_ep;
41 int cur_alt;
42
43 unsigned pattern;
44 unsigned isoc_interval;
45 unsigned isoc_maxpacket;
46 unsigned isoc_mult;
47 unsigned isoc_maxburst;
48 unsigned buflen;
49 unsigned bulk_qlen;
50 unsigned iso_qlen;
51};
52
53static inline struct f_sourcesink *func_to_ss(struct usb_function *f)
54{
55 return container_of(f, struct f_sourcesink, function);
56}
57
58/*-------------------------------------------------------------------------*/
59
60static struct usb_interface_descriptor source_sink_intf_alt0 = {
61 .bLength = USB_DT_INTERFACE_SIZE,
62 .bDescriptorType = USB_DT_INTERFACE,
63
64 .bAlternateSetting = 0,
65 .bNumEndpoints = 2,
66 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
67 /* .iInterface = DYNAMIC */
68};
69
70static struct usb_interface_descriptor source_sink_intf_alt1 = {
71 .bLength = USB_DT_INTERFACE_SIZE,
72 .bDescriptorType = USB_DT_INTERFACE,
73
74 .bAlternateSetting = 1,
75 .bNumEndpoints = 4,
76 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
77 /* .iInterface = DYNAMIC */
78};
79
80/* full speed support: */
81
82static struct usb_endpoint_descriptor fs_source_desc = {
83 .bLength = USB_DT_ENDPOINT_SIZE,
84 .bDescriptorType = USB_DT_ENDPOINT,
85
86 .bEndpointAddress = USB_DIR_IN,
87 .bmAttributes = USB_ENDPOINT_XFER_BULK,
88};
89
90static struct usb_endpoint_descriptor fs_sink_desc = {
91 .bLength = USB_DT_ENDPOINT_SIZE,
92 .bDescriptorType = USB_DT_ENDPOINT,
93
94 .bEndpointAddress = USB_DIR_OUT,
95 .bmAttributes = USB_ENDPOINT_XFER_BULK,
96};
97
98static struct usb_endpoint_descriptor fs_iso_source_desc = {
99 .bLength = USB_DT_ENDPOINT_SIZE,
100 .bDescriptorType = USB_DT_ENDPOINT,
101
102 .bEndpointAddress = USB_DIR_IN,
103 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
104 .wMaxPacketSize = cpu_to_le16(1023),
105 .bInterval = 4,
106};
107
108static struct usb_endpoint_descriptor fs_iso_sink_desc = {
109 .bLength = USB_DT_ENDPOINT_SIZE,
110 .bDescriptorType = USB_DT_ENDPOINT,
111
112 .bEndpointAddress = USB_DIR_OUT,
113 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
114 .wMaxPacketSize = cpu_to_le16(1023),
115 .bInterval = 4,
116};
117
118static struct usb_descriptor_header *fs_source_sink_descs[] = {
119 (struct usb_descriptor_header *) &source_sink_intf_alt0,
120 (struct usb_descriptor_header *) &fs_sink_desc,
121 (struct usb_descriptor_header *) &fs_source_desc,
122 (struct usb_descriptor_header *) &source_sink_intf_alt1,
123#define FS_ALT_IFC_1_OFFSET 3
124 (struct usb_descriptor_header *) &fs_sink_desc,
125 (struct usb_descriptor_header *) &fs_source_desc,
126 (struct usb_descriptor_header *) &fs_iso_sink_desc,
127 (struct usb_descriptor_header *) &fs_iso_source_desc,
128 NULL,
129};
130
131/* high speed support: */
132
133static struct usb_endpoint_descriptor hs_source_desc = {
134 .bLength = USB_DT_ENDPOINT_SIZE,
135 .bDescriptorType = USB_DT_ENDPOINT,
136
137 .bmAttributes = USB_ENDPOINT_XFER_BULK,
138 .wMaxPacketSize = cpu_to_le16(512),
139};
140
141static struct usb_endpoint_descriptor hs_sink_desc = {
142 .bLength = USB_DT_ENDPOINT_SIZE,
143 .bDescriptorType = USB_DT_ENDPOINT,
144
145 .bmAttributes = USB_ENDPOINT_XFER_BULK,
146 .wMaxPacketSize = cpu_to_le16(512),
147};
148
149static struct usb_endpoint_descriptor hs_iso_source_desc = {
150 .bLength = USB_DT_ENDPOINT_SIZE,
151 .bDescriptorType = USB_DT_ENDPOINT,
152
153 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
154 .wMaxPacketSize = cpu_to_le16(1024),
155 .bInterval = 4,
156};
157
158static struct usb_endpoint_descriptor hs_iso_sink_desc = {
159 .bLength = USB_DT_ENDPOINT_SIZE,
160 .bDescriptorType = USB_DT_ENDPOINT,
161
162 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
163 .wMaxPacketSize = cpu_to_le16(1024),
164 .bInterval = 4,
165};
166
167static struct usb_descriptor_header *hs_source_sink_descs[] = {
168 (struct usb_descriptor_header *) &source_sink_intf_alt0,
169 (struct usb_descriptor_header *) &hs_source_desc,
170 (struct usb_descriptor_header *) &hs_sink_desc,
171 (struct usb_descriptor_header *) &source_sink_intf_alt1,
172#define HS_ALT_IFC_1_OFFSET 3
173 (struct usb_descriptor_header *) &hs_source_desc,
174 (struct usb_descriptor_header *) &hs_sink_desc,
175 (struct usb_descriptor_header *) &hs_iso_source_desc,
176 (struct usb_descriptor_header *) &hs_iso_sink_desc,
177 NULL,
178};
179
180/* super speed support: */
181
182static struct usb_endpoint_descriptor ss_source_desc = {
183 .bLength = USB_DT_ENDPOINT_SIZE,
184 .bDescriptorType = USB_DT_ENDPOINT,
185
186 .bmAttributes = USB_ENDPOINT_XFER_BULK,
187 .wMaxPacketSize = cpu_to_le16(1024),
188};
189
190static struct usb_ss_ep_comp_descriptor ss_source_comp_desc = {
191 .bLength = USB_DT_SS_EP_COMP_SIZE,
192 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
193
194 .bMaxBurst = 0,
195 .bmAttributes = 0,
196 .wBytesPerInterval = 0,
197};
198
199static struct usb_endpoint_descriptor ss_sink_desc = {
200 .bLength = USB_DT_ENDPOINT_SIZE,
201 .bDescriptorType = USB_DT_ENDPOINT,
202
203 .bmAttributes = USB_ENDPOINT_XFER_BULK,
204 .wMaxPacketSize = cpu_to_le16(1024),
205};
206
207static struct usb_ss_ep_comp_descriptor ss_sink_comp_desc = {
208 .bLength = USB_DT_SS_EP_COMP_SIZE,
209 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
210
211 .bMaxBurst = 0,
212 .bmAttributes = 0,
213 .wBytesPerInterval = 0,
214};
215
216static struct usb_endpoint_descriptor ss_iso_source_desc = {
217 .bLength = USB_DT_ENDPOINT_SIZE,
218 .bDescriptorType = USB_DT_ENDPOINT,
219
220 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
221 .wMaxPacketSize = cpu_to_le16(1024),
222 .bInterval = 4,
223};
224
225static struct usb_ss_ep_comp_descriptor ss_iso_source_comp_desc = {
226 .bLength = USB_DT_SS_EP_COMP_SIZE,
227 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
228
229 .bMaxBurst = 0,
230 .bmAttributes = 0,
231 .wBytesPerInterval = cpu_to_le16(1024),
232};
233
234static struct usb_endpoint_descriptor ss_iso_sink_desc = {
235 .bLength = USB_DT_ENDPOINT_SIZE,
236 .bDescriptorType = USB_DT_ENDPOINT,
237
238 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
239 .wMaxPacketSize = cpu_to_le16(1024),
240 .bInterval = 4,
241};
242
243static struct usb_ss_ep_comp_descriptor ss_iso_sink_comp_desc = {
244 .bLength = USB_DT_SS_EP_COMP_SIZE,
245 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
246
247 .bMaxBurst = 0,
248 .bmAttributes = 0,
249 .wBytesPerInterval = cpu_to_le16(1024),
250};
251
252static struct usb_descriptor_header *ss_source_sink_descs[] = {
253 (struct usb_descriptor_header *) &source_sink_intf_alt0,
254 (struct usb_descriptor_header *) &ss_source_desc,
255 (struct usb_descriptor_header *) &ss_source_comp_desc,
256 (struct usb_descriptor_header *) &ss_sink_desc,
257 (struct usb_descriptor_header *) &ss_sink_comp_desc,
258 (struct usb_descriptor_header *) &source_sink_intf_alt1,
259#define SS_ALT_IFC_1_OFFSET 5
260 (struct usb_descriptor_header *) &ss_source_desc,
261 (struct usb_descriptor_header *) &ss_source_comp_desc,
262 (struct usb_descriptor_header *) &ss_sink_desc,
263 (struct usb_descriptor_header *) &ss_sink_comp_desc,
264 (struct usb_descriptor_header *) &ss_iso_source_desc,
265 (struct usb_descriptor_header *) &ss_iso_source_comp_desc,
266 (struct usb_descriptor_header *) &ss_iso_sink_desc,
267 (struct usb_descriptor_header *) &ss_iso_sink_comp_desc,
268 NULL,
269};
270
271/* function-specific strings: */
272
273static struct usb_string strings_sourcesink[] = {
274 [0].s = "source and sink data",
275 { } /* end of list */
276};
277
278static struct usb_gadget_strings stringtab_sourcesink = {
279 .language = 0x0409, /* en-us */
280 .strings = strings_sourcesink,
281};
282
283static struct usb_gadget_strings *sourcesink_strings[] = {
284 &stringtab_sourcesink,
285 NULL,
286};
287
288/*-------------------------------------------------------------------------*/
289
290static inline struct usb_request *ss_alloc_ep_req(struct usb_ep *ep, int len)
291{
292 return alloc_ep_req(ep, len);
293}
294
295static void disable_ep(struct usb_composite_dev *cdev, struct usb_ep *ep)
296{
297 int value;
298
299 value = usb_ep_disable(ep);
300 if (value < 0)
301 DBG(cdev, "disable %s --> %d\n", ep->name, value);
302}
303
304void disable_endpoints(struct usb_composite_dev *cdev,
305 struct usb_ep *in, struct usb_ep *out,
306 struct usb_ep *iso_in, struct usb_ep *iso_out)
307{
308 disable_ep(cdev, in);
309 disable_ep(cdev, out);
310 if (iso_in)
311 disable_ep(cdev, iso_in);
312 if (iso_out)
313 disable_ep(cdev, iso_out);
314}
315
316static int
317sourcesink_bind(struct usb_configuration *c, struct usb_function *f)
318{
319 struct usb_composite_dev *cdev = c->cdev;
320 struct f_sourcesink *ss = func_to_ss(f);
321 int id;
322 int ret;
323
324 /* allocate interface ID(s) */
325 id = usb_interface_id(c, f);
326 if (id < 0)
327 return id;
328 source_sink_intf_alt0.bInterfaceNumber = id;
329 source_sink_intf_alt1.bInterfaceNumber = id;
330
331 /* allocate bulk endpoints */
332 ss->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc);
333 if (!ss->in_ep) {
334autoconf_fail:
335 ERROR(cdev, "%s: can't autoconfigure on %s\n",
336 f->name, cdev->gadget->name);
337 return -ENODEV;
338 }
339
340 ss->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_sink_desc);
341 if (!ss->out_ep)
342 goto autoconf_fail;
343
344 /* sanity check the isoc module parameters */
345 if (ss->isoc_interval < 1)
346 ss->isoc_interval = 1;
347 if (ss->isoc_interval > 16)
348 ss->isoc_interval = 16;
349 if (ss->isoc_mult > 2)
350 ss->isoc_mult = 2;
351 if (ss->isoc_maxburst > 15)
352 ss->isoc_maxburst = 15;
353
354 /* fill in the FS isoc descriptors from the module parameters */
355 fs_iso_source_desc.wMaxPacketSize = ss->isoc_maxpacket > 1023 ?
356 1023 : ss->isoc_maxpacket;
357 fs_iso_source_desc.bInterval = ss->isoc_interval;
358 fs_iso_sink_desc.wMaxPacketSize = ss->isoc_maxpacket > 1023 ?
359 1023 : ss->isoc_maxpacket;
360 fs_iso_sink_desc.bInterval = ss->isoc_interval;
361
362 /* allocate iso endpoints */
363 ss->iso_in_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_source_desc);
364 if (!ss->iso_in_ep)
365 goto no_iso;
366
367 ss->iso_out_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_sink_desc);
368 if (!ss->iso_out_ep) {
369 usb_ep_autoconfig_release(ss->iso_in_ep);
370 ss->iso_in_ep = NULL;
371no_iso:
372 /*
373 * We still want to work even if the UDC doesn't have isoc
374 * endpoints, so null out the alt interface that contains
375 * them and continue.
376 */
377 fs_source_sink_descs[FS_ALT_IFC_1_OFFSET] = NULL;
378 hs_source_sink_descs[HS_ALT_IFC_1_OFFSET] = NULL;
379 ss_source_sink_descs[SS_ALT_IFC_1_OFFSET] = NULL;
380 }
381
382 if (ss->isoc_maxpacket > 1024)
383 ss->isoc_maxpacket = 1024;
384
385 /* support high speed hardware */
386 hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
387 hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
388
389 /*
390 * Fill in the HS isoc descriptors from the module parameters.
391 * We assume that the user knows what they are doing and won't
392 * give parameters that their UDC doesn't support.
393 */
394 hs_iso_source_desc.wMaxPacketSize = ss->isoc_maxpacket;
395 hs_iso_source_desc.wMaxPacketSize |= ss->isoc_mult << 11;
396 hs_iso_source_desc.bInterval = ss->isoc_interval;
397 hs_iso_source_desc.bEndpointAddress =
398 fs_iso_source_desc.bEndpointAddress;
399
400 hs_iso_sink_desc.wMaxPacketSize = ss->isoc_maxpacket;
401 hs_iso_sink_desc.wMaxPacketSize |= ss->isoc_mult << 11;
402 hs_iso_sink_desc.bInterval = ss->isoc_interval;
403 hs_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
404
405 /* support super speed hardware */
406 ss_source_desc.bEndpointAddress =
407 fs_source_desc.bEndpointAddress;
408 ss_sink_desc.bEndpointAddress =
409 fs_sink_desc.bEndpointAddress;
410
411 /*
412 * Fill in the SS isoc descriptors from the module parameters.
413 * We assume that the user knows what they are doing and won't
414 * give parameters that their UDC doesn't support.
415 */
416 ss_iso_source_desc.wMaxPacketSize = ss->isoc_maxpacket;
417 ss_iso_source_desc.bInterval = ss->isoc_interval;
418 ss_iso_source_comp_desc.bmAttributes = ss->isoc_mult;
419 ss_iso_source_comp_desc.bMaxBurst = ss->isoc_maxburst;
420 ss_iso_source_comp_desc.wBytesPerInterval = ss->isoc_maxpacket *
421 (ss->isoc_mult + 1) * (ss->isoc_maxburst + 1);
422 ss_iso_source_desc.bEndpointAddress =
423 fs_iso_source_desc.bEndpointAddress;
424
425 ss_iso_sink_desc.wMaxPacketSize = ss->isoc_maxpacket;
426 ss_iso_sink_desc.bInterval = ss->isoc_interval;
427 ss_iso_sink_comp_desc.bmAttributes = ss->isoc_mult;
428 ss_iso_sink_comp_desc.bMaxBurst = ss->isoc_maxburst;
429 ss_iso_sink_comp_desc.wBytesPerInterval = ss->isoc_maxpacket *
430 (ss->isoc_mult + 1) * (ss->isoc_maxburst + 1);
431 ss_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
432
433 ret = usb_assign_descriptors(f, fs_source_sink_descs,
434 hs_source_sink_descs, ss_source_sink_descs,
435 ss_source_sink_descs);
436 if (ret)
437 return ret;
438
439 DBG(cdev, "%s: IN/%s, OUT/%s, ISO-IN/%s, ISO-OUT/%s\n",
440 f->name, ss->in_ep->name, ss->out_ep->name,
441 ss->iso_in_ep ? ss->iso_in_ep->name : "<none>",
442 ss->iso_out_ep ? ss->iso_out_ep->name : "<none>");
443 return 0;
444}
445
446static void
447sourcesink_free_func(struct usb_function *f)
448{
449 struct f_ss_opts *opts;
450
451 opts = container_of(f->fi, struct f_ss_opts, func_inst);
452
453 mutex_lock(&opts->lock);
454 opts->refcnt--;
455 mutex_unlock(&opts->lock);
456
457 usb_free_all_descriptors(f);
458 kfree(func_to_ss(f));
459}
460
461/* optionally require specific source/sink data patterns */
462static int check_read_data(struct f_sourcesink *ss, struct usb_request *req)
463{
464 unsigned i;
465 u8 *buf = req->buf;
466 struct usb_composite_dev *cdev = ss->function.config->cdev;
467 int max_packet_size = le16_to_cpu(ss->out_ep->desc->wMaxPacketSize);
468
469 if (ss->pattern == 2)
470 return 0;
471
472 for (i = 0; i < req->actual; i++, buf++) {
473 switch (ss->pattern) {
474
475 /* all-zeroes has no synchronization issues */
476 case 0:
477 if (*buf == 0)
478 continue;
479 break;
480
481 /* "mod63" stays in sync with short-terminated transfers,
482 * OR otherwise when host and gadget agree on how large
483 * each usb transfer request should be. Resync is done
484 * with set_interface or set_config. (We *WANT* it to
485 * get quickly out of sync if controllers or their drivers
486 * stutter for any reason, including buffer duplication...)
487 */
488 case 1:
489 if (*buf == (u8)((i % max_packet_size) % 63))
490 continue;
491 break;
492 }
493 ERROR(cdev, "bad OUT byte, buf[%d] = %d\n", i, *buf);
494 usb_ep_set_halt(ss->out_ep);
495 return -EINVAL;
496 }
497 return 0;
498}
499
500static void reinit_write_data(struct usb_ep *ep, struct usb_request *req)
501{
502 unsigned i;
503 u8 *buf = req->buf;
504 int max_packet_size = le16_to_cpu(ep->desc->wMaxPacketSize);
505 struct f_sourcesink *ss = ep->driver_data;
506
507 switch (ss->pattern) {
508 case 0:
509 memset(req->buf, 0, req->length);
510 break;
511 case 1:
512 for (i = 0; i < req->length; i++)
513 *buf++ = (u8) ((i % max_packet_size) % 63);
514 break;
515 case 2:
516 break;
517 }
518}
519
520static void source_sink_complete(struct usb_ep *ep, struct usb_request *req)
521{
522 struct usb_composite_dev *cdev;
523 struct f_sourcesink *ss = ep->driver_data;
524 int status = req->status;
525
526 /* driver_data will be null if ep has been disabled */
527 if (!ss)
528 return;
529
530 cdev = ss->function.config->cdev;
531
532 switch (status) {
533
534 case 0: /* normal completion? */
535 if (ep == ss->out_ep) {
536 check_read_data(ss, req);
537 if (ss->pattern != 2)
538 memset(req->buf, 0x55, req->length);
539 }
540 break;
541
542 /* this endpoint is normally active while we're configured */
543 case -ECONNABORTED: /* hardware forced ep reset */
544 case -ECONNRESET: /* request dequeued */
545 case -ESHUTDOWN: /* disconnect from host */
546 VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status,
547 req->actual, req->length);
548 if (ep == ss->out_ep)
549 check_read_data(ss, req);
550 free_ep_req(ep, req);
551 return;
552
553 case -EOVERFLOW: /* buffer overrun on read means that
554 * we didn't provide a big enough
555 * buffer.
556 */
557 default:
558#if 1
559 DBG(cdev, "%s complete --> %d, %d/%d\n", ep->name,
560 status, req->actual, req->length);
561 break;
562#endif
563 case -EREMOTEIO: /* short read */
564 break;
565 }
566
567 status = usb_ep_queue(ep, req, GFP_ATOMIC);
568 if (status) {
569 ERROR(cdev, "kill %s: resubmit %d bytes --> %d\n",
570 ep->name, req->length, status);
571 usb_ep_set_halt(ep);
572 /* FIXME recover later ... somehow */
573 }
574}
575
576static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in,
577 bool is_iso, int speed)
578{
579 struct usb_ep *ep;
580 struct usb_request *req;
581 int i, size, qlen, status = 0;
582
583 if (is_iso) {
584 switch (speed) {
585 case USB_SPEED_SUPER_PLUS:
586 case USB_SPEED_SUPER:
587 size = ss->isoc_maxpacket *
588 (ss->isoc_mult + 1) *
589 (ss->isoc_maxburst + 1);
590 break;
591 case USB_SPEED_HIGH:
592 size = ss->isoc_maxpacket * (ss->isoc_mult + 1);
593 break;
594 default:
595 size = ss->isoc_maxpacket > 1023 ?
596 1023 : ss->isoc_maxpacket;
597 break;
598 }
599 ep = is_in ? ss->iso_in_ep : ss->iso_out_ep;
600 qlen = ss->iso_qlen;
601 } else {
602 ep = is_in ? ss->in_ep : ss->out_ep;
603 qlen = ss->bulk_qlen;
604 size = ss->buflen;
605 }
606
607 for (i = 0; i < qlen; i++) {
608 req = ss_alloc_ep_req(ep, size);
609 if (!req)
610 return -ENOMEM;
611
612 req->complete = source_sink_complete;
613 if (is_in)
614 reinit_write_data(ep, req);
615 else if (ss->pattern != 2)
616 memset(req->buf, 0x55, req->length);
617
618 status = usb_ep_queue(ep, req, GFP_ATOMIC);
619 if (status) {
620 struct usb_composite_dev *cdev;
621
622 cdev = ss->function.config->cdev;
623 ERROR(cdev, "start %s%s %s --> %d\n",
624 is_iso ? "ISO-" : "", is_in ? "IN" : "OUT",
625 ep->name, status);
626 free_ep_req(ep, req);
627 return status;
628 }
629 }
630
631 return status;
632}
633
634static void disable_source_sink(struct f_sourcesink *ss)
635{
636 struct usb_composite_dev *cdev;
637
638 cdev = ss->function.config->cdev;
639 disable_endpoints(cdev, ss->in_ep, ss->out_ep, ss->iso_in_ep,
640 ss->iso_out_ep);
641 VDBG(cdev, "%s disabled\n", ss->function.name);
642}
643
644static int
645enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss,
646 int alt)
647{
648 int result = 0;
649 int speed = cdev->gadget->speed;
650 struct usb_ep *ep;
651
652 /* one bulk endpoint writes (sources) zeroes IN (to the host) */
653 ep = ss->in_ep;
654 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
655 if (result)
656 return result;
657 result = usb_ep_enable(ep);
658 if (result < 0)
659 return result;
660 ep->driver_data = ss;
661
662 result = source_sink_start_ep(ss, true, false, speed);
663 if (result < 0) {
664fail:
665 ep = ss->in_ep;
666 usb_ep_disable(ep);
667 return result;
668 }
669
670 /* one bulk endpoint reads (sinks) anything OUT (from the host) */
671 ep = ss->out_ep;
672 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
673 if (result)
674 goto fail;
675 result = usb_ep_enable(ep);
676 if (result < 0)
677 goto fail;
678 ep->driver_data = ss;
679
680 result = source_sink_start_ep(ss, false, false, speed);
681 if (result < 0) {
682fail2:
683 ep = ss->out_ep;
684 usb_ep_disable(ep);
685 goto fail;
686 }
687
688 if (alt == 0)
689 goto out;
690
691 /* one iso endpoint writes (sources) zeroes IN (to the host) */
692 ep = ss->iso_in_ep;
693 if (ep) {
694 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
695 if (result)
696 goto fail2;
697 result = usb_ep_enable(ep);
698 if (result < 0)
699 goto fail2;
700 ep->driver_data = ss;
701
702 result = source_sink_start_ep(ss, true, true, speed);
703 if (result < 0) {
704fail3:
705 ep = ss->iso_in_ep;
706 if (ep)
707 usb_ep_disable(ep);
708 goto fail2;
709 }
710 }
711
712 /* one iso endpoint reads (sinks) anything OUT (from the host) */
713 ep = ss->iso_out_ep;
714 if (ep) {
715 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
716 if (result)
717 goto fail3;
718 result = usb_ep_enable(ep);
719 if (result < 0)
720 goto fail3;
721 ep->driver_data = ss;
722
723 result = source_sink_start_ep(ss, false, true, speed);
724 if (result < 0) {
725 usb_ep_disable(ep);
726 goto fail3;
727 }
728 }
729out:
730 ss->cur_alt = alt;
731
732 DBG(cdev, "%s enabled, alt intf %d\n", ss->function.name, alt);
733 return result;
734}
735
736static int sourcesink_set_alt(struct usb_function *f,
737 unsigned intf, unsigned alt)
738{
739 struct f_sourcesink *ss = func_to_ss(f);
740 struct usb_composite_dev *cdev = f->config->cdev;
741
742 disable_source_sink(ss);
743 return enable_source_sink(cdev, ss, alt);
744}
745
746static int sourcesink_get_alt(struct usb_function *f, unsigned intf)
747{
748 struct f_sourcesink *ss = func_to_ss(f);
749
750 return ss->cur_alt;
751}
752
753static void sourcesink_disable(struct usb_function *f)
754{
755 struct f_sourcesink *ss = func_to_ss(f);
756
757 disable_source_sink(ss);
758}
759
760/*-------------------------------------------------------------------------*/
761
762static int sourcesink_setup(struct usb_function *f,
763 const struct usb_ctrlrequest *ctrl)
764{
765 struct usb_configuration *c = f->config;
766 struct usb_request *req = c->cdev->req;
767 int value = -EOPNOTSUPP;
768 u16 w_index = le16_to_cpu(ctrl->wIndex);
769 u16 w_value = le16_to_cpu(ctrl->wValue);
770 u16 w_length = le16_to_cpu(ctrl->wLength);
771
772 req->length = USB_COMP_EP0_BUFSIZ;
773
774 /* composite driver infrastructure handles everything except
775 * the two control test requests.
776 */
777 switch (ctrl->bRequest) {
778
779 /*
780 * These are the same vendor-specific requests supported by
781 * Intel's USB 2.0 compliance test devices. We exceed that
782 * device spec by allowing multiple-packet requests.
783 *
784 * NOTE: the Control-OUT data stays in req->buf ... better
785 * would be copying it into a scratch buffer, so that other
786 * requests may safely intervene.
787 */
788 case 0x5b: /* control WRITE test -- fill the buffer */
789 if (ctrl->bRequestType != (USB_DIR_OUT|USB_TYPE_VENDOR))
790 goto unknown;
791 if (w_value || w_index)
792 break;
793 /* just read that many bytes into the buffer */
794 if (w_length > req->length)
795 break;
796 value = w_length;
797 break;
798 case 0x5c: /* control READ test -- return the buffer */
799 if (ctrl->bRequestType != (USB_DIR_IN|USB_TYPE_VENDOR))
800 goto unknown;
801 if (w_value || w_index)
802 break;
803 /* expect those bytes are still in the buffer; send back */
804 if (w_length > req->length)
805 break;
806 value = w_length;
807 break;
808
809 default:
810unknown:
811 VDBG(c->cdev,
812 "unknown control req%02x.%02x v%04x i%04x l%d\n",
813 ctrl->bRequestType, ctrl->bRequest,
814 w_value, w_index, w_length);
815 }
816
817 /* respond with data transfer or status phase? */
818 if (value >= 0) {
819 VDBG(c->cdev, "source/sink req%02x.%02x v%04x i%04x l%d\n",
820 ctrl->bRequestType, ctrl->bRequest,
821 w_value, w_index, w_length);
822 req->zero = 0;
823 req->length = value;
824 value = usb_ep_queue(c->cdev->gadget->ep0, req, GFP_ATOMIC);
825 if (value < 0)
826 ERROR(c->cdev, "source/sink response, err %d\n",
827 value);
828 }
829
830 /* device either stalls (value < 0) or reports success */
831 return value;
832}
833
834static struct usb_function *source_sink_alloc_func(
835 struct usb_function_instance *fi)
836{
837 struct f_sourcesink *ss;
838 struct f_ss_opts *ss_opts;
839
840 ss = kzalloc(sizeof(*ss), GFP_KERNEL);
841 if (!ss)
842 return ERR_PTR(-ENOMEM);
843
844 ss_opts = container_of(fi, struct f_ss_opts, func_inst);
845
846 mutex_lock(&ss_opts->lock);
847 ss_opts->refcnt++;
848 mutex_unlock(&ss_opts->lock);
849
850 ss->pattern = ss_opts->pattern;
851 ss->isoc_interval = ss_opts->isoc_interval;
852 ss->isoc_maxpacket = ss_opts->isoc_maxpacket;
853 ss->isoc_mult = ss_opts->isoc_mult;
854 ss->isoc_maxburst = ss_opts->isoc_maxburst;
855 ss->buflen = ss_opts->bulk_buflen;
856 ss->bulk_qlen = ss_opts->bulk_qlen;
857 ss->iso_qlen = ss_opts->iso_qlen;
858
859 ss->function.name = "source/sink";
860 ss->function.bind = sourcesink_bind;
861 ss->function.set_alt = sourcesink_set_alt;
862 ss->function.get_alt = sourcesink_get_alt;
863 ss->function.disable = sourcesink_disable;
864 ss->function.setup = sourcesink_setup;
865 ss->function.strings = sourcesink_strings;
866
867 ss->function.free_func = sourcesink_free_func;
868
869 return &ss->function;
870}
871
872static inline struct f_ss_opts *to_f_ss_opts(struct config_item *item)
873{
874 return container_of(to_config_group(item), struct f_ss_opts,
875 func_inst.group);
876}
877
878static void ss_attr_release(struct config_item *item)
879{
880 struct f_ss_opts *ss_opts = to_f_ss_opts(item);
881
882 usb_put_function_instance(&ss_opts->func_inst);
883}
884
885static struct configfs_item_operations ss_item_ops = {
886 .release = ss_attr_release,
887};
888
889static ssize_t f_ss_opts_pattern_show(struct config_item *item, char *page)
890{
891 struct f_ss_opts *opts = to_f_ss_opts(item);
892 int result;
893
894 mutex_lock(&opts->lock);
895 result = sprintf(page, "%u\n", opts->pattern);
896 mutex_unlock(&opts->lock);
897
898 return result;
899}
900
901static ssize_t f_ss_opts_pattern_store(struct config_item *item,
902 const char *page, size_t len)
903{
904 struct f_ss_opts *opts = to_f_ss_opts(item);
905 int ret;
906 u8 num;
907
908 mutex_lock(&opts->lock);
909 if (opts->refcnt) {
910 ret = -EBUSY;
911 goto end;
912 }
913
914 ret = kstrtou8(page, 0, &num);
915 if (ret)
916 goto end;
917
918 if (num != 0 && num != 1 && num != 2) {
919 ret = -EINVAL;
920 goto end;
921 }
922
923 opts->pattern = num;
924 ret = len;
925end:
926 mutex_unlock(&opts->lock);
927 return ret;
928}
929
930CONFIGFS_ATTR(f_ss_opts_, pattern);
931
932static ssize_t f_ss_opts_isoc_interval_show(struct config_item *item, char *page)
933{
934 struct f_ss_opts *opts = to_f_ss_opts(item);
935 int result;
936
937 mutex_lock(&opts->lock);
938 result = sprintf(page, "%u\n", opts->isoc_interval);
939 mutex_unlock(&opts->lock);
940
941 return result;
942}
943
944static ssize_t f_ss_opts_isoc_interval_store(struct config_item *item,
945 const char *page, size_t len)
946{
947 struct f_ss_opts *opts = to_f_ss_opts(item);
948 int ret;
949 u8 num;
950
951 mutex_lock(&opts->lock);
952 if (opts->refcnt) {
953 ret = -EBUSY;
954 goto end;
955 }
956
957 ret = kstrtou8(page, 0, &num);
958 if (ret)
959 goto end;
960
961 if (num > 16) {
962 ret = -EINVAL;
963 goto end;
964 }
965
966 opts->isoc_interval = num;
967 ret = len;
968end:
969 mutex_unlock(&opts->lock);
970 return ret;
971}
972
973CONFIGFS_ATTR(f_ss_opts_, isoc_interval);
974
975static ssize_t f_ss_opts_isoc_maxpacket_show(struct config_item *item, char *page)
976{
977 struct f_ss_opts *opts = to_f_ss_opts(item);
978 int result;
979
980 mutex_lock(&opts->lock);
981 result = sprintf(page, "%u\n", opts->isoc_maxpacket);
982 mutex_unlock(&opts->lock);
983
984 return result;
985}
986
987static ssize_t f_ss_opts_isoc_maxpacket_store(struct config_item *item,
988 const char *page, size_t len)
989{
990 struct f_ss_opts *opts = to_f_ss_opts(item);
991 int ret;
992 u16 num;
993
994 mutex_lock(&opts->lock);
995 if (opts->refcnt) {
996 ret = -EBUSY;
997 goto end;
998 }
999
1000 ret = kstrtou16(page, 0, &num);
1001 if (ret)
1002 goto end;
1003
1004 if (num > 1024) {
1005 ret = -EINVAL;
1006 goto end;
1007 }
1008
1009 opts->isoc_maxpacket = num;
1010 ret = len;
1011end:
1012 mutex_unlock(&opts->lock);
1013 return ret;
1014}
1015
1016CONFIGFS_ATTR(f_ss_opts_, isoc_maxpacket);
1017
1018static ssize_t f_ss_opts_isoc_mult_show(struct config_item *item, char *page)
1019{
1020 struct f_ss_opts *opts = to_f_ss_opts(item);
1021 int result;
1022
1023 mutex_lock(&opts->lock);
1024 result = sprintf(page, "%u\n", opts->isoc_mult);
1025 mutex_unlock(&opts->lock);
1026
1027 return result;
1028}
1029
1030static ssize_t f_ss_opts_isoc_mult_store(struct config_item *item,
1031 const char *page, size_t len)
1032{
1033 struct f_ss_opts *opts = to_f_ss_opts(item);
1034 int ret;
1035 u8 num;
1036
1037 mutex_lock(&opts->lock);
1038 if (opts->refcnt) {
1039 ret = -EBUSY;
1040 goto end;
1041 }
1042
1043 ret = kstrtou8(page, 0, &num);
1044 if (ret)
1045 goto end;
1046
1047 if (num > 2) {
1048 ret = -EINVAL;
1049 goto end;
1050 }
1051
1052 opts->isoc_mult = num;
1053 ret = len;
1054end:
1055 mutex_unlock(&opts->lock);
1056 return ret;
1057}
1058
1059CONFIGFS_ATTR(f_ss_opts_, isoc_mult);
1060
1061static ssize_t f_ss_opts_isoc_maxburst_show(struct config_item *item, char *page)
1062{
1063 struct f_ss_opts *opts = to_f_ss_opts(item);
1064 int result;
1065
1066 mutex_lock(&opts->lock);
1067 result = sprintf(page, "%u\n", opts->isoc_maxburst);
1068 mutex_unlock(&opts->lock);
1069
1070 return result;
1071}
1072
1073static ssize_t f_ss_opts_isoc_maxburst_store(struct config_item *item,
1074 const char *page, size_t len)
1075{
1076 struct f_ss_opts *opts = to_f_ss_opts(item);
1077 int ret;
1078 u8 num;
1079
1080 mutex_lock(&opts->lock);
1081 if (opts->refcnt) {
1082 ret = -EBUSY;
1083 goto end;
1084 }
1085
1086 ret = kstrtou8(page, 0, &num);
1087 if (ret)
1088 goto end;
1089
1090 if (num > 15) {
1091 ret = -EINVAL;
1092 goto end;
1093 }
1094
1095 opts->isoc_maxburst = num;
1096 ret = len;
1097end:
1098 mutex_unlock(&opts->lock);
1099 return ret;
1100}
1101
1102CONFIGFS_ATTR(f_ss_opts_, isoc_maxburst);
1103
1104static ssize_t f_ss_opts_bulk_buflen_show(struct config_item *item, char *page)
1105{
1106 struct f_ss_opts *opts = to_f_ss_opts(item);
1107 int result;
1108
1109 mutex_lock(&opts->lock);
1110 result = sprintf(page, "%u\n", opts->bulk_buflen);
1111 mutex_unlock(&opts->lock);
1112
1113 return result;
1114}
1115
1116static ssize_t f_ss_opts_bulk_buflen_store(struct config_item *item,
1117 const char *page, size_t len)
1118{
1119 struct f_ss_opts *opts = to_f_ss_opts(item);
1120 int ret;
1121 u32 num;
1122
1123 mutex_lock(&opts->lock);
1124 if (opts->refcnt) {
1125 ret = -EBUSY;
1126 goto end;
1127 }
1128
1129 ret = kstrtou32(page, 0, &num);
1130 if (ret)
1131 goto end;
1132
1133 opts->bulk_buflen = num;
1134 ret = len;
1135end:
1136 mutex_unlock(&opts->lock);
1137 return ret;
1138}
1139
1140CONFIGFS_ATTR(f_ss_opts_, bulk_buflen);
1141
1142static ssize_t f_ss_opts_bulk_qlen_show(struct config_item *item, char *page)
1143{
1144 struct f_ss_opts *opts = to_f_ss_opts(item);
1145 int result;
1146
1147 mutex_lock(&opts->lock);
1148 result = sprintf(page, "%u\n", opts->bulk_qlen);
1149 mutex_unlock(&opts->lock);
1150
1151 return result;
1152}
1153
1154static ssize_t f_ss_opts_bulk_qlen_store(struct config_item *item,
1155 const char *page, size_t len)
1156{
1157 struct f_ss_opts *opts = to_f_ss_opts(item);
1158 int ret;
1159 u32 num;
1160
1161 mutex_lock(&opts->lock);
1162 if (opts->refcnt) {
1163 ret = -EBUSY;
1164 goto end;
1165 }
1166
1167 ret = kstrtou32(page, 0, &num);
1168 if (ret)
1169 goto end;
1170
1171 opts->bulk_qlen = num;
1172 ret = len;
1173end:
1174 mutex_unlock(&opts->lock);
1175 return ret;
1176}
1177
1178CONFIGFS_ATTR(f_ss_opts_, bulk_qlen);
1179
1180static ssize_t f_ss_opts_iso_qlen_show(struct config_item *item, char *page)
1181{
1182 struct f_ss_opts *opts = to_f_ss_opts(item);
1183 int result;
1184
1185 mutex_lock(&opts->lock);
1186 result = sprintf(page, "%u\n", opts->iso_qlen);
1187 mutex_unlock(&opts->lock);
1188
1189 return result;
1190}
1191
1192static ssize_t f_ss_opts_iso_qlen_store(struct config_item *item,
1193 const char *page, size_t len)
1194{
1195 struct f_ss_opts *opts = to_f_ss_opts(item);
1196 int ret;
1197 u32 num;
1198
1199 mutex_lock(&opts->lock);
1200 if (opts->refcnt) {
1201 ret = -EBUSY;
1202 goto end;
1203 }
1204
1205 ret = kstrtou32(page, 0, &num);
1206 if (ret)
1207 goto end;
1208
1209 opts->iso_qlen = num;
1210 ret = len;
1211end:
1212 mutex_unlock(&opts->lock);
1213 return ret;
1214}
1215
1216CONFIGFS_ATTR(f_ss_opts_, iso_qlen);
1217
1218static struct configfs_attribute *ss_attrs[] = {
1219 &f_ss_opts_attr_pattern,
1220 &f_ss_opts_attr_isoc_interval,
1221 &f_ss_opts_attr_isoc_maxpacket,
1222 &f_ss_opts_attr_isoc_mult,
1223 &f_ss_opts_attr_isoc_maxburst,
1224 &f_ss_opts_attr_bulk_buflen,
1225 &f_ss_opts_attr_bulk_qlen,
1226 &f_ss_opts_attr_iso_qlen,
1227 NULL,
1228};
1229
1230static const struct config_item_type ss_func_type = {
1231 .ct_item_ops = &ss_item_ops,
1232 .ct_attrs = ss_attrs,
1233 .ct_owner = THIS_MODULE,
1234};
1235
1236static void source_sink_free_instance(struct usb_function_instance *fi)
1237{
1238 struct f_ss_opts *ss_opts;
1239
1240 ss_opts = container_of(fi, struct f_ss_opts, func_inst);
1241 kfree(ss_opts);
1242}
1243
1244static struct usb_function_instance *source_sink_alloc_inst(void)
1245{
1246 struct f_ss_opts *ss_opts;
1247
1248 ss_opts = kzalloc(sizeof(*ss_opts), GFP_KERNEL);
1249 if (!ss_opts)
1250 return ERR_PTR(-ENOMEM);
1251 mutex_init(&ss_opts->lock);
1252 ss_opts->func_inst.free_func_inst = source_sink_free_instance;
1253 ss_opts->isoc_interval = GZERO_ISOC_INTERVAL;
1254 ss_opts->isoc_maxpacket = GZERO_ISOC_MAXPACKET;
1255 ss_opts->bulk_buflen = GZERO_BULK_BUFLEN;
1256 ss_opts->bulk_qlen = GZERO_SS_BULK_QLEN;
1257 ss_opts->iso_qlen = GZERO_SS_ISO_QLEN;
1258
1259 config_group_init_type_name(&ss_opts->func_inst.group, "",
1260 &ss_func_type);
1261
1262 return &ss_opts->func_inst;
1263}
1264DECLARE_USB_FUNCTION(SourceSink, source_sink_alloc_inst,
1265 source_sink_alloc_func);
1266
1267static int __init sslb_modinit(void)
1268{
1269 int ret;
1270
1271 ret = usb_function_register(&SourceSinkusb_func);
1272 if (ret)
1273 return ret;
1274 ret = lb_modinit();
1275 if (ret)
1276 usb_function_unregister(&SourceSinkusb_func);
1277 return ret;
1278}
1279static void __exit sslb_modexit(void)
1280{
1281 usb_function_unregister(&SourceSinkusb_func);
1282 lb_modexit();
1283}
1284module_init(sslb_modinit);
1285module_exit(sslb_modexit);
1286
1287MODULE_LICENSE("GPL");
1/*
2 * f_sourcesink.c - USB peripheral source/sink configuration driver
3 *
4 * Copyright (C) 2003-2008 David Brownell
5 * Copyright (C) 2008 by Nokia Corporation
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 */
12
13/* #define VERBOSE_DEBUG */
14
15#include <linux/slab.h>
16#include <linux/kernel.h>
17#include <linux/device.h>
18#include <linux/module.h>
19#include <linux/usb/composite.h>
20#include <linux/err.h>
21
22#include "g_zero.h"
23#include "u_f.h"
24
25/*
26 * SOURCE/SINK FUNCTION ... a primary testing vehicle for USB peripheral
27 * controller drivers.
28 *
29 * This just sinks bulk packets OUT to the peripheral and sources them IN
30 * to the host, optionally with specific data patterns for integrity tests.
31 * As such it supports basic functionality and load tests.
32 *
33 * In terms of control messaging, this supports all the standard requests
34 * plus two that support control-OUT tests. If the optional "autoresume"
35 * mode is enabled, it provides good functional coverage for the "USBCV"
36 * test harness from USB-IF.
37 */
38struct f_sourcesink {
39 struct usb_function function;
40
41 struct usb_ep *in_ep;
42 struct usb_ep *out_ep;
43 struct usb_ep *iso_in_ep;
44 struct usb_ep *iso_out_ep;
45 int cur_alt;
46
47 unsigned pattern;
48 unsigned isoc_interval;
49 unsigned isoc_maxpacket;
50 unsigned isoc_mult;
51 unsigned isoc_maxburst;
52 unsigned buflen;
53 unsigned bulk_qlen;
54 unsigned iso_qlen;
55};
56
57static inline struct f_sourcesink *func_to_ss(struct usb_function *f)
58{
59 return container_of(f, struct f_sourcesink, function);
60}
61
62/*-------------------------------------------------------------------------*/
63
64static struct usb_interface_descriptor source_sink_intf_alt0 = {
65 .bLength = USB_DT_INTERFACE_SIZE,
66 .bDescriptorType = USB_DT_INTERFACE,
67
68 .bAlternateSetting = 0,
69 .bNumEndpoints = 2,
70 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
71 /* .iInterface = DYNAMIC */
72};
73
74static struct usb_interface_descriptor source_sink_intf_alt1 = {
75 .bLength = USB_DT_INTERFACE_SIZE,
76 .bDescriptorType = USB_DT_INTERFACE,
77
78 .bAlternateSetting = 1,
79 .bNumEndpoints = 4,
80 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
81 /* .iInterface = DYNAMIC */
82};
83
84/* full speed support: */
85
86static struct usb_endpoint_descriptor fs_source_desc = {
87 .bLength = USB_DT_ENDPOINT_SIZE,
88 .bDescriptorType = USB_DT_ENDPOINT,
89
90 .bEndpointAddress = USB_DIR_IN,
91 .bmAttributes = USB_ENDPOINT_XFER_BULK,
92};
93
94static struct usb_endpoint_descriptor fs_sink_desc = {
95 .bLength = USB_DT_ENDPOINT_SIZE,
96 .bDescriptorType = USB_DT_ENDPOINT,
97
98 .bEndpointAddress = USB_DIR_OUT,
99 .bmAttributes = USB_ENDPOINT_XFER_BULK,
100};
101
102static struct usb_endpoint_descriptor fs_iso_source_desc = {
103 .bLength = USB_DT_ENDPOINT_SIZE,
104 .bDescriptorType = USB_DT_ENDPOINT,
105
106 .bEndpointAddress = USB_DIR_IN,
107 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
108 .wMaxPacketSize = cpu_to_le16(1023),
109 .bInterval = 4,
110};
111
112static struct usb_endpoint_descriptor fs_iso_sink_desc = {
113 .bLength = USB_DT_ENDPOINT_SIZE,
114 .bDescriptorType = USB_DT_ENDPOINT,
115
116 .bEndpointAddress = USB_DIR_OUT,
117 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
118 .wMaxPacketSize = cpu_to_le16(1023),
119 .bInterval = 4,
120};
121
122static struct usb_descriptor_header *fs_source_sink_descs[] = {
123 (struct usb_descriptor_header *) &source_sink_intf_alt0,
124 (struct usb_descriptor_header *) &fs_sink_desc,
125 (struct usb_descriptor_header *) &fs_source_desc,
126 (struct usb_descriptor_header *) &source_sink_intf_alt1,
127#define FS_ALT_IFC_1_OFFSET 3
128 (struct usb_descriptor_header *) &fs_sink_desc,
129 (struct usb_descriptor_header *) &fs_source_desc,
130 (struct usb_descriptor_header *) &fs_iso_sink_desc,
131 (struct usb_descriptor_header *) &fs_iso_source_desc,
132 NULL,
133};
134
135/* high speed support: */
136
137static struct usb_endpoint_descriptor hs_source_desc = {
138 .bLength = USB_DT_ENDPOINT_SIZE,
139 .bDescriptorType = USB_DT_ENDPOINT,
140
141 .bmAttributes = USB_ENDPOINT_XFER_BULK,
142 .wMaxPacketSize = cpu_to_le16(512),
143};
144
145static struct usb_endpoint_descriptor hs_sink_desc = {
146 .bLength = USB_DT_ENDPOINT_SIZE,
147 .bDescriptorType = USB_DT_ENDPOINT,
148
149 .bmAttributes = USB_ENDPOINT_XFER_BULK,
150 .wMaxPacketSize = cpu_to_le16(512),
151};
152
153static struct usb_endpoint_descriptor hs_iso_source_desc = {
154 .bLength = USB_DT_ENDPOINT_SIZE,
155 .bDescriptorType = USB_DT_ENDPOINT,
156
157 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
158 .wMaxPacketSize = cpu_to_le16(1024),
159 .bInterval = 4,
160};
161
162static struct usb_endpoint_descriptor hs_iso_sink_desc = {
163 .bLength = USB_DT_ENDPOINT_SIZE,
164 .bDescriptorType = USB_DT_ENDPOINT,
165
166 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
167 .wMaxPacketSize = cpu_to_le16(1024),
168 .bInterval = 4,
169};
170
171static struct usb_descriptor_header *hs_source_sink_descs[] = {
172 (struct usb_descriptor_header *) &source_sink_intf_alt0,
173 (struct usb_descriptor_header *) &hs_source_desc,
174 (struct usb_descriptor_header *) &hs_sink_desc,
175 (struct usb_descriptor_header *) &source_sink_intf_alt1,
176#define HS_ALT_IFC_1_OFFSET 3
177 (struct usb_descriptor_header *) &hs_source_desc,
178 (struct usb_descriptor_header *) &hs_sink_desc,
179 (struct usb_descriptor_header *) &hs_iso_source_desc,
180 (struct usb_descriptor_header *) &hs_iso_sink_desc,
181 NULL,
182};
183
184/* super speed support: */
185
186static struct usb_endpoint_descriptor ss_source_desc = {
187 .bLength = USB_DT_ENDPOINT_SIZE,
188 .bDescriptorType = USB_DT_ENDPOINT,
189
190 .bmAttributes = USB_ENDPOINT_XFER_BULK,
191 .wMaxPacketSize = cpu_to_le16(1024),
192};
193
194static struct usb_ss_ep_comp_descriptor ss_source_comp_desc = {
195 .bLength = USB_DT_SS_EP_COMP_SIZE,
196 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
197
198 .bMaxBurst = 0,
199 .bmAttributes = 0,
200 .wBytesPerInterval = 0,
201};
202
203static struct usb_endpoint_descriptor ss_sink_desc = {
204 .bLength = USB_DT_ENDPOINT_SIZE,
205 .bDescriptorType = USB_DT_ENDPOINT,
206
207 .bmAttributes = USB_ENDPOINT_XFER_BULK,
208 .wMaxPacketSize = cpu_to_le16(1024),
209};
210
211static struct usb_ss_ep_comp_descriptor ss_sink_comp_desc = {
212 .bLength = USB_DT_SS_EP_COMP_SIZE,
213 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
214
215 .bMaxBurst = 0,
216 .bmAttributes = 0,
217 .wBytesPerInterval = 0,
218};
219
220static struct usb_endpoint_descriptor ss_iso_source_desc = {
221 .bLength = USB_DT_ENDPOINT_SIZE,
222 .bDescriptorType = USB_DT_ENDPOINT,
223
224 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
225 .wMaxPacketSize = cpu_to_le16(1024),
226 .bInterval = 4,
227};
228
229static struct usb_ss_ep_comp_descriptor ss_iso_source_comp_desc = {
230 .bLength = USB_DT_SS_EP_COMP_SIZE,
231 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
232
233 .bMaxBurst = 0,
234 .bmAttributes = 0,
235 .wBytesPerInterval = cpu_to_le16(1024),
236};
237
238static struct usb_endpoint_descriptor ss_iso_sink_desc = {
239 .bLength = USB_DT_ENDPOINT_SIZE,
240 .bDescriptorType = USB_DT_ENDPOINT,
241
242 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
243 .wMaxPacketSize = cpu_to_le16(1024),
244 .bInterval = 4,
245};
246
247static struct usb_ss_ep_comp_descriptor ss_iso_sink_comp_desc = {
248 .bLength = USB_DT_SS_EP_COMP_SIZE,
249 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
250
251 .bMaxBurst = 0,
252 .bmAttributes = 0,
253 .wBytesPerInterval = cpu_to_le16(1024),
254};
255
256static struct usb_descriptor_header *ss_source_sink_descs[] = {
257 (struct usb_descriptor_header *) &source_sink_intf_alt0,
258 (struct usb_descriptor_header *) &ss_source_desc,
259 (struct usb_descriptor_header *) &ss_source_comp_desc,
260 (struct usb_descriptor_header *) &ss_sink_desc,
261 (struct usb_descriptor_header *) &ss_sink_comp_desc,
262 (struct usb_descriptor_header *) &source_sink_intf_alt1,
263#define SS_ALT_IFC_1_OFFSET 5
264 (struct usb_descriptor_header *) &ss_source_desc,
265 (struct usb_descriptor_header *) &ss_source_comp_desc,
266 (struct usb_descriptor_header *) &ss_sink_desc,
267 (struct usb_descriptor_header *) &ss_sink_comp_desc,
268 (struct usb_descriptor_header *) &ss_iso_source_desc,
269 (struct usb_descriptor_header *) &ss_iso_source_comp_desc,
270 (struct usb_descriptor_header *) &ss_iso_sink_desc,
271 (struct usb_descriptor_header *) &ss_iso_sink_comp_desc,
272 NULL,
273};
274
275/* function-specific strings: */
276
277static struct usb_string strings_sourcesink[] = {
278 [0].s = "source and sink data",
279 { } /* end of list */
280};
281
282static struct usb_gadget_strings stringtab_sourcesink = {
283 .language = 0x0409, /* en-us */
284 .strings = strings_sourcesink,
285};
286
287static struct usb_gadget_strings *sourcesink_strings[] = {
288 &stringtab_sourcesink,
289 NULL,
290};
291
292/*-------------------------------------------------------------------------*/
293
294static inline struct usb_request *ss_alloc_ep_req(struct usb_ep *ep, int len)
295{
296 struct f_sourcesink *ss = ep->driver_data;
297
298 return alloc_ep_req(ep, len, ss->buflen);
299}
300
301static void disable_ep(struct usb_composite_dev *cdev, struct usb_ep *ep)
302{
303 int value;
304
305 value = usb_ep_disable(ep);
306 if (value < 0)
307 DBG(cdev, "disable %s --> %d\n", ep->name, value);
308}
309
310void disable_endpoints(struct usb_composite_dev *cdev,
311 struct usb_ep *in, struct usb_ep *out,
312 struct usb_ep *iso_in, struct usb_ep *iso_out)
313{
314 disable_ep(cdev, in);
315 disable_ep(cdev, out);
316 if (iso_in)
317 disable_ep(cdev, iso_in);
318 if (iso_out)
319 disable_ep(cdev, iso_out);
320}
321
322static int
323sourcesink_bind(struct usb_configuration *c, struct usb_function *f)
324{
325 struct usb_composite_dev *cdev = c->cdev;
326 struct f_sourcesink *ss = func_to_ss(f);
327 int id;
328 int ret;
329
330 /* allocate interface ID(s) */
331 id = usb_interface_id(c, f);
332 if (id < 0)
333 return id;
334 source_sink_intf_alt0.bInterfaceNumber = id;
335 source_sink_intf_alt1.bInterfaceNumber = id;
336
337 /* allocate bulk endpoints */
338 ss->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc);
339 if (!ss->in_ep) {
340autoconf_fail:
341 ERROR(cdev, "%s: can't autoconfigure on %s\n",
342 f->name, cdev->gadget->name);
343 return -ENODEV;
344 }
345
346 ss->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_sink_desc);
347 if (!ss->out_ep)
348 goto autoconf_fail;
349
350 /* sanity check the isoc module parameters */
351 if (ss->isoc_interval < 1)
352 ss->isoc_interval = 1;
353 if (ss->isoc_interval > 16)
354 ss->isoc_interval = 16;
355 if (ss->isoc_mult > 2)
356 ss->isoc_mult = 2;
357 if (ss->isoc_maxburst > 15)
358 ss->isoc_maxburst = 15;
359
360 /* fill in the FS isoc descriptors from the module parameters */
361 fs_iso_source_desc.wMaxPacketSize = ss->isoc_maxpacket > 1023 ?
362 1023 : ss->isoc_maxpacket;
363 fs_iso_source_desc.bInterval = ss->isoc_interval;
364 fs_iso_sink_desc.wMaxPacketSize = ss->isoc_maxpacket > 1023 ?
365 1023 : ss->isoc_maxpacket;
366 fs_iso_sink_desc.bInterval = ss->isoc_interval;
367
368 /* allocate iso endpoints */
369 ss->iso_in_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_source_desc);
370 if (!ss->iso_in_ep)
371 goto no_iso;
372
373 ss->iso_out_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_sink_desc);
374 if (!ss->iso_out_ep) {
375 usb_ep_autoconfig_release(ss->iso_in_ep);
376 ss->iso_in_ep = NULL;
377no_iso:
378 /*
379 * We still want to work even if the UDC doesn't have isoc
380 * endpoints, so null out the alt interface that contains
381 * them and continue.
382 */
383 fs_source_sink_descs[FS_ALT_IFC_1_OFFSET] = NULL;
384 hs_source_sink_descs[HS_ALT_IFC_1_OFFSET] = NULL;
385 ss_source_sink_descs[SS_ALT_IFC_1_OFFSET] = NULL;
386 }
387
388 if (ss->isoc_maxpacket > 1024)
389 ss->isoc_maxpacket = 1024;
390
391 /* support high speed hardware */
392 hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
393 hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
394
395 /*
396 * Fill in the HS isoc descriptors from the module parameters.
397 * We assume that the user knows what they are doing and won't
398 * give parameters that their UDC doesn't support.
399 */
400 hs_iso_source_desc.wMaxPacketSize = ss->isoc_maxpacket;
401 hs_iso_source_desc.wMaxPacketSize |= ss->isoc_mult << 11;
402 hs_iso_source_desc.bInterval = ss->isoc_interval;
403 hs_iso_source_desc.bEndpointAddress =
404 fs_iso_source_desc.bEndpointAddress;
405
406 hs_iso_sink_desc.wMaxPacketSize = ss->isoc_maxpacket;
407 hs_iso_sink_desc.wMaxPacketSize |= ss->isoc_mult << 11;
408 hs_iso_sink_desc.bInterval = ss->isoc_interval;
409 hs_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
410
411 /* support super speed hardware */
412 ss_source_desc.bEndpointAddress =
413 fs_source_desc.bEndpointAddress;
414 ss_sink_desc.bEndpointAddress =
415 fs_sink_desc.bEndpointAddress;
416
417 /*
418 * Fill in the SS isoc descriptors from the module parameters.
419 * We assume that the user knows what they are doing and won't
420 * give parameters that their UDC doesn't support.
421 */
422 ss_iso_source_desc.wMaxPacketSize = ss->isoc_maxpacket;
423 ss_iso_source_desc.bInterval = ss->isoc_interval;
424 ss_iso_source_comp_desc.bmAttributes = ss->isoc_mult;
425 ss_iso_source_comp_desc.bMaxBurst = ss->isoc_maxburst;
426 ss_iso_source_comp_desc.wBytesPerInterval = ss->isoc_maxpacket *
427 (ss->isoc_mult + 1) * (ss->isoc_maxburst + 1);
428 ss_iso_source_desc.bEndpointAddress =
429 fs_iso_source_desc.bEndpointAddress;
430
431 ss_iso_sink_desc.wMaxPacketSize = ss->isoc_maxpacket;
432 ss_iso_sink_desc.bInterval = ss->isoc_interval;
433 ss_iso_sink_comp_desc.bmAttributes = ss->isoc_mult;
434 ss_iso_sink_comp_desc.bMaxBurst = ss->isoc_maxburst;
435 ss_iso_sink_comp_desc.wBytesPerInterval = ss->isoc_maxpacket *
436 (ss->isoc_mult + 1) * (ss->isoc_maxburst + 1);
437 ss_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
438
439 ret = usb_assign_descriptors(f, fs_source_sink_descs,
440 hs_source_sink_descs, ss_source_sink_descs, NULL);
441 if (ret)
442 return ret;
443
444 DBG(cdev, "%s speed %s: IN/%s, OUT/%s, ISO-IN/%s, ISO-OUT/%s\n",
445 (gadget_is_superspeed(c->cdev->gadget) ? "super" :
446 (gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full")),
447 f->name, ss->in_ep->name, ss->out_ep->name,
448 ss->iso_in_ep ? ss->iso_in_ep->name : "<none>",
449 ss->iso_out_ep ? ss->iso_out_ep->name : "<none>");
450 return 0;
451}
452
453static void
454sourcesink_free_func(struct usb_function *f)
455{
456 struct f_ss_opts *opts;
457
458 opts = container_of(f->fi, struct f_ss_opts, func_inst);
459
460 mutex_lock(&opts->lock);
461 opts->refcnt--;
462 mutex_unlock(&opts->lock);
463
464 usb_free_all_descriptors(f);
465 kfree(func_to_ss(f));
466}
467
468/* optionally require specific source/sink data patterns */
469static int check_read_data(struct f_sourcesink *ss, struct usb_request *req)
470{
471 unsigned i;
472 u8 *buf = req->buf;
473 struct usb_composite_dev *cdev = ss->function.config->cdev;
474 int max_packet_size = le16_to_cpu(ss->out_ep->desc->wMaxPacketSize);
475
476 if (ss->pattern == 2)
477 return 0;
478
479 for (i = 0; i < req->actual; i++, buf++) {
480 switch (ss->pattern) {
481
482 /* all-zeroes has no synchronization issues */
483 case 0:
484 if (*buf == 0)
485 continue;
486 break;
487
488 /* "mod63" stays in sync with short-terminated transfers,
489 * OR otherwise when host and gadget agree on how large
490 * each usb transfer request should be. Resync is done
491 * with set_interface or set_config. (We *WANT* it to
492 * get quickly out of sync if controllers or their drivers
493 * stutter for any reason, including buffer duplication...)
494 */
495 case 1:
496 if (*buf == (u8)((i % max_packet_size) % 63))
497 continue;
498 break;
499 }
500 ERROR(cdev, "bad OUT byte, buf[%d] = %d\n", i, *buf);
501 usb_ep_set_halt(ss->out_ep);
502 return -EINVAL;
503 }
504 return 0;
505}
506
507static void reinit_write_data(struct usb_ep *ep, struct usb_request *req)
508{
509 unsigned i;
510 u8 *buf = req->buf;
511 int max_packet_size = le16_to_cpu(ep->desc->wMaxPacketSize);
512 struct f_sourcesink *ss = ep->driver_data;
513
514 switch (ss->pattern) {
515 case 0:
516 memset(req->buf, 0, req->length);
517 break;
518 case 1:
519 for (i = 0; i < req->length; i++)
520 *buf++ = (u8) ((i % max_packet_size) % 63);
521 break;
522 case 2:
523 break;
524 }
525}
526
527static void source_sink_complete(struct usb_ep *ep, struct usb_request *req)
528{
529 struct usb_composite_dev *cdev;
530 struct f_sourcesink *ss = ep->driver_data;
531 int status = req->status;
532
533 /* driver_data will be null if ep has been disabled */
534 if (!ss)
535 return;
536
537 cdev = ss->function.config->cdev;
538
539 switch (status) {
540
541 case 0: /* normal completion? */
542 if (ep == ss->out_ep) {
543 check_read_data(ss, req);
544 if (ss->pattern != 2)
545 memset(req->buf, 0x55, req->length);
546 }
547 break;
548
549 /* this endpoint is normally active while we're configured */
550 case -ECONNABORTED: /* hardware forced ep reset */
551 case -ECONNRESET: /* request dequeued */
552 case -ESHUTDOWN: /* disconnect from host */
553 VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status,
554 req->actual, req->length);
555 if (ep == ss->out_ep)
556 check_read_data(ss, req);
557 free_ep_req(ep, req);
558 return;
559
560 case -EOVERFLOW: /* buffer overrun on read means that
561 * we didn't provide a big enough
562 * buffer.
563 */
564 default:
565#if 1
566 DBG(cdev, "%s complete --> %d, %d/%d\n", ep->name,
567 status, req->actual, req->length);
568#endif
569 case -EREMOTEIO: /* short read */
570 break;
571 }
572
573 status = usb_ep_queue(ep, req, GFP_ATOMIC);
574 if (status) {
575 ERROR(cdev, "kill %s: resubmit %d bytes --> %d\n",
576 ep->name, req->length, status);
577 usb_ep_set_halt(ep);
578 /* FIXME recover later ... somehow */
579 }
580}
581
582static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in,
583 bool is_iso, int speed)
584{
585 struct usb_ep *ep;
586 struct usb_request *req;
587 int i, size, qlen, status = 0;
588
589 if (is_iso) {
590 switch (speed) {
591 case USB_SPEED_SUPER:
592 size = ss->isoc_maxpacket *
593 (ss->isoc_mult + 1) *
594 (ss->isoc_maxburst + 1);
595 break;
596 case USB_SPEED_HIGH:
597 size = ss->isoc_maxpacket * (ss->isoc_mult + 1);
598 break;
599 default:
600 size = ss->isoc_maxpacket > 1023 ?
601 1023 : ss->isoc_maxpacket;
602 break;
603 }
604 ep = is_in ? ss->iso_in_ep : ss->iso_out_ep;
605 qlen = ss->iso_qlen;
606 } else {
607 ep = is_in ? ss->in_ep : ss->out_ep;
608 qlen = ss->bulk_qlen;
609 size = 0;
610 }
611
612 for (i = 0; i < qlen; i++) {
613 req = ss_alloc_ep_req(ep, size);
614 if (!req)
615 return -ENOMEM;
616
617 req->complete = source_sink_complete;
618 if (is_in)
619 reinit_write_data(ep, req);
620 else if (ss->pattern != 2)
621 memset(req->buf, 0x55, req->length);
622
623 status = usb_ep_queue(ep, req, GFP_ATOMIC);
624 if (status) {
625 struct usb_composite_dev *cdev;
626
627 cdev = ss->function.config->cdev;
628 ERROR(cdev, "start %s%s %s --> %d\n",
629 is_iso ? "ISO-" : "", is_in ? "IN" : "OUT",
630 ep->name, status);
631 free_ep_req(ep, req);
632 return status;
633 }
634 }
635
636 return status;
637}
638
639static void disable_source_sink(struct f_sourcesink *ss)
640{
641 struct usb_composite_dev *cdev;
642
643 cdev = ss->function.config->cdev;
644 disable_endpoints(cdev, ss->in_ep, ss->out_ep, ss->iso_in_ep,
645 ss->iso_out_ep);
646 VDBG(cdev, "%s disabled\n", ss->function.name);
647}
648
649static int
650enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss,
651 int alt)
652{
653 int result = 0;
654 int speed = cdev->gadget->speed;
655 struct usb_ep *ep;
656
657 /* one bulk endpoint writes (sources) zeroes IN (to the host) */
658 ep = ss->in_ep;
659 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
660 if (result)
661 return result;
662 result = usb_ep_enable(ep);
663 if (result < 0)
664 return result;
665 ep->driver_data = ss;
666
667 result = source_sink_start_ep(ss, true, false, speed);
668 if (result < 0) {
669fail:
670 ep = ss->in_ep;
671 usb_ep_disable(ep);
672 return result;
673 }
674
675 /* one bulk endpoint reads (sinks) anything OUT (from the host) */
676 ep = ss->out_ep;
677 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
678 if (result)
679 goto fail;
680 result = usb_ep_enable(ep);
681 if (result < 0)
682 goto fail;
683 ep->driver_data = ss;
684
685 result = source_sink_start_ep(ss, false, false, speed);
686 if (result < 0) {
687fail2:
688 ep = ss->out_ep;
689 usb_ep_disable(ep);
690 goto fail;
691 }
692
693 if (alt == 0)
694 goto out;
695
696 /* one iso endpoint writes (sources) zeroes IN (to the host) */
697 ep = ss->iso_in_ep;
698 if (ep) {
699 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
700 if (result)
701 goto fail2;
702 result = usb_ep_enable(ep);
703 if (result < 0)
704 goto fail2;
705 ep->driver_data = ss;
706
707 result = source_sink_start_ep(ss, true, true, speed);
708 if (result < 0) {
709fail3:
710 ep = ss->iso_in_ep;
711 if (ep)
712 usb_ep_disable(ep);
713 goto fail2;
714 }
715 }
716
717 /* one iso endpoint reads (sinks) anything OUT (from the host) */
718 ep = ss->iso_out_ep;
719 if (ep) {
720 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
721 if (result)
722 goto fail3;
723 result = usb_ep_enable(ep);
724 if (result < 0)
725 goto fail3;
726 ep->driver_data = ss;
727
728 result = source_sink_start_ep(ss, false, true, speed);
729 if (result < 0) {
730 usb_ep_disable(ep);
731 goto fail3;
732 }
733 }
734out:
735 ss->cur_alt = alt;
736
737 DBG(cdev, "%s enabled, alt intf %d\n", ss->function.name, alt);
738 return result;
739}
740
741static int sourcesink_set_alt(struct usb_function *f,
742 unsigned intf, unsigned alt)
743{
744 struct f_sourcesink *ss = func_to_ss(f);
745 struct usb_composite_dev *cdev = f->config->cdev;
746
747 disable_source_sink(ss);
748 return enable_source_sink(cdev, ss, alt);
749}
750
751static int sourcesink_get_alt(struct usb_function *f, unsigned intf)
752{
753 struct f_sourcesink *ss = func_to_ss(f);
754
755 return ss->cur_alt;
756}
757
758static void sourcesink_disable(struct usb_function *f)
759{
760 struct f_sourcesink *ss = func_to_ss(f);
761
762 disable_source_sink(ss);
763}
764
765/*-------------------------------------------------------------------------*/
766
767static int sourcesink_setup(struct usb_function *f,
768 const struct usb_ctrlrequest *ctrl)
769{
770 struct usb_configuration *c = f->config;
771 struct usb_request *req = c->cdev->req;
772 int value = -EOPNOTSUPP;
773 u16 w_index = le16_to_cpu(ctrl->wIndex);
774 u16 w_value = le16_to_cpu(ctrl->wValue);
775 u16 w_length = le16_to_cpu(ctrl->wLength);
776
777 req->length = USB_COMP_EP0_BUFSIZ;
778
779 /* composite driver infrastructure handles everything except
780 * the two control test requests.
781 */
782 switch (ctrl->bRequest) {
783
784 /*
785 * These are the same vendor-specific requests supported by
786 * Intel's USB 2.0 compliance test devices. We exceed that
787 * device spec by allowing multiple-packet requests.
788 *
789 * NOTE: the Control-OUT data stays in req->buf ... better
790 * would be copying it into a scratch buffer, so that other
791 * requests may safely intervene.
792 */
793 case 0x5b: /* control WRITE test -- fill the buffer */
794 if (ctrl->bRequestType != (USB_DIR_OUT|USB_TYPE_VENDOR))
795 goto unknown;
796 if (w_value || w_index)
797 break;
798 /* just read that many bytes into the buffer */
799 if (w_length > req->length)
800 break;
801 value = w_length;
802 break;
803 case 0x5c: /* control READ test -- return the buffer */
804 if (ctrl->bRequestType != (USB_DIR_IN|USB_TYPE_VENDOR))
805 goto unknown;
806 if (w_value || w_index)
807 break;
808 /* expect those bytes are still in the buffer; send back */
809 if (w_length > req->length)
810 break;
811 value = w_length;
812 break;
813
814 default:
815unknown:
816 VDBG(c->cdev,
817 "unknown control req%02x.%02x v%04x i%04x l%d\n",
818 ctrl->bRequestType, ctrl->bRequest,
819 w_value, w_index, w_length);
820 }
821
822 /* respond with data transfer or status phase? */
823 if (value >= 0) {
824 VDBG(c->cdev, "source/sink req%02x.%02x v%04x i%04x l%d\n",
825 ctrl->bRequestType, ctrl->bRequest,
826 w_value, w_index, w_length);
827 req->zero = 0;
828 req->length = value;
829 value = usb_ep_queue(c->cdev->gadget->ep0, req, GFP_ATOMIC);
830 if (value < 0)
831 ERROR(c->cdev, "source/sink response, err %d\n",
832 value);
833 }
834
835 /* device either stalls (value < 0) or reports success */
836 return value;
837}
838
839static struct usb_function *source_sink_alloc_func(
840 struct usb_function_instance *fi)
841{
842 struct f_sourcesink *ss;
843 struct f_ss_opts *ss_opts;
844
845 ss = kzalloc(sizeof(*ss), GFP_KERNEL);
846 if (!ss)
847 return NULL;
848
849 ss_opts = container_of(fi, struct f_ss_opts, func_inst);
850
851 mutex_lock(&ss_opts->lock);
852 ss_opts->refcnt++;
853 mutex_unlock(&ss_opts->lock);
854
855 ss->pattern = ss_opts->pattern;
856 ss->isoc_interval = ss_opts->isoc_interval;
857 ss->isoc_maxpacket = ss_opts->isoc_maxpacket;
858 ss->isoc_mult = ss_opts->isoc_mult;
859 ss->isoc_maxburst = ss_opts->isoc_maxburst;
860 ss->buflen = ss_opts->bulk_buflen;
861 ss->bulk_qlen = ss_opts->bulk_qlen;
862 ss->iso_qlen = ss_opts->iso_qlen;
863
864 ss->function.name = "source/sink";
865 ss->function.bind = sourcesink_bind;
866 ss->function.set_alt = sourcesink_set_alt;
867 ss->function.get_alt = sourcesink_get_alt;
868 ss->function.disable = sourcesink_disable;
869 ss->function.setup = sourcesink_setup;
870 ss->function.strings = sourcesink_strings;
871
872 ss->function.free_func = sourcesink_free_func;
873
874 return &ss->function;
875}
876
877static inline struct f_ss_opts *to_f_ss_opts(struct config_item *item)
878{
879 return container_of(to_config_group(item), struct f_ss_opts,
880 func_inst.group);
881}
882
883static void ss_attr_release(struct config_item *item)
884{
885 struct f_ss_opts *ss_opts = to_f_ss_opts(item);
886
887 usb_put_function_instance(&ss_opts->func_inst);
888}
889
890static struct configfs_item_operations ss_item_ops = {
891 .release = ss_attr_release,
892};
893
894static ssize_t f_ss_opts_pattern_show(struct config_item *item, char *page)
895{
896 struct f_ss_opts *opts = to_f_ss_opts(item);
897 int result;
898
899 mutex_lock(&opts->lock);
900 result = sprintf(page, "%u\n", opts->pattern);
901 mutex_unlock(&opts->lock);
902
903 return result;
904}
905
906static ssize_t f_ss_opts_pattern_store(struct config_item *item,
907 const char *page, size_t len)
908{
909 struct f_ss_opts *opts = to_f_ss_opts(item);
910 int ret;
911 u8 num;
912
913 mutex_lock(&opts->lock);
914 if (opts->refcnt) {
915 ret = -EBUSY;
916 goto end;
917 }
918
919 ret = kstrtou8(page, 0, &num);
920 if (ret)
921 goto end;
922
923 if (num != 0 && num != 1 && num != 2) {
924 ret = -EINVAL;
925 goto end;
926 }
927
928 opts->pattern = num;
929 ret = len;
930end:
931 mutex_unlock(&opts->lock);
932 return ret;
933}
934
935CONFIGFS_ATTR(f_ss_opts_, pattern);
936
937static ssize_t f_ss_opts_isoc_interval_show(struct config_item *item, char *page)
938{
939 struct f_ss_opts *opts = to_f_ss_opts(item);
940 int result;
941
942 mutex_lock(&opts->lock);
943 result = sprintf(page, "%u\n", opts->isoc_interval);
944 mutex_unlock(&opts->lock);
945
946 return result;
947}
948
949static ssize_t f_ss_opts_isoc_interval_store(struct config_item *item,
950 const char *page, size_t len)
951{
952 struct f_ss_opts *opts = to_f_ss_opts(item);
953 int ret;
954 u8 num;
955
956 mutex_lock(&opts->lock);
957 if (opts->refcnt) {
958 ret = -EBUSY;
959 goto end;
960 }
961
962 ret = kstrtou8(page, 0, &num);
963 if (ret)
964 goto end;
965
966 if (num > 16) {
967 ret = -EINVAL;
968 goto end;
969 }
970
971 opts->isoc_interval = num;
972 ret = len;
973end:
974 mutex_unlock(&opts->lock);
975 return ret;
976}
977
978CONFIGFS_ATTR(f_ss_opts_, isoc_interval);
979
980static ssize_t f_ss_opts_isoc_maxpacket_show(struct config_item *item, char *page)
981{
982 struct f_ss_opts *opts = to_f_ss_opts(item);
983 int result;
984
985 mutex_lock(&opts->lock);
986 result = sprintf(page, "%u\n", opts->isoc_maxpacket);
987 mutex_unlock(&opts->lock);
988
989 return result;
990}
991
992static ssize_t f_ss_opts_isoc_maxpacket_store(struct config_item *item,
993 const char *page, size_t len)
994{
995 struct f_ss_opts *opts = to_f_ss_opts(item);
996 int ret;
997 u16 num;
998
999 mutex_lock(&opts->lock);
1000 if (opts->refcnt) {
1001 ret = -EBUSY;
1002 goto end;
1003 }
1004
1005 ret = kstrtou16(page, 0, &num);
1006 if (ret)
1007 goto end;
1008
1009 if (num > 1024) {
1010 ret = -EINVAL;
1011 goto end;
1012 }
1013
1014 opts->isoc_maxpacket = num;
1015 ret = len;
1016end:
1017 mutex_unlock(&opts->lock);
1018 return ret;
1019}
1020
1021CONFIGFS_ATTR(f_ss_opts_, isoc_maxpacket);
1022
1023static ssize_t f_ss_opts_isoc_mult_show(struct config_item *item, char *page)
1024{
1025 struct f_ss_opts *opts = to_f_ss_opts(item);
1026 int result;
1027
1028 mutex_lock(&opts->lock);
1029 result = sprintf(page, "%u\n", opts->isoc_mult);
1030 mutex_unlock(&opts->lock);
1031
1032 return result;
1033}
1034
1035static ssize_t f_ss_opts_isoc_mult_store(struct config_item *item,
1036 const char *page, size_t len)
1037{
1038 struct f_ss_opts *opts = to_f_ss_opts(item);
1039 int ret;
1040 u8 num;
1041
1042 mutex_lock(&opts->lock);
1043 if (opts->refcnt) {
1044 ret = -EBUSY;
1045 goto end;
1046 }
1047
1048 ret = kstrtou8(page, 0, &num);
1049 if (ret)
1050 goto end;
1051
1052 if (num > 2) {
1053 ret = -EINVAL;
1054 goto end;
1055 }
1056
1057 opts->isoc_mult = num;
1058 ret = len;
1059end:
1060 mutex_unlock(&opts->lock);
1061 return ret;
1062}
1063
1064CONFIGFS_ATTR(f_ss_opts_, isoc_mult);
1065
1066static ssize_t f_ss_opts_isoc_maxburst_show(struct config_item *item, char *page)
1067{
1068 struct f_ss_opts *opts = to_f_ss_opts(item);
1069 int result;
1070
1071 mutex_lock(&opts->lock);
1072 result = sprintf(page, "%u\n", opts->isoc_maxburst);
1073 mutex_unlock(&opts->lock);
1074
1075 return result;
1076}
1077
1078static ssize_t f_ss_opts_isoc_maxburst_store(struct config_item *item,
1079 const char *page, size_t len)
1080{
1081 struct f_ss_opts *opts = to_f_ss_opts(item);
1082 int ret;
1083 u8 num;
1084
1085 mutex_lock(&opts->lock);
1086 if (opts->refcnt) {
1087 ret = -EBUSY;
1088 goto end;
1089 }
1090
1091 ret = kstrtou8(page, 0, &num);
1092 if (ret)
1093 goto end;
1094
1095 if (num > 15) {
1096 ret = -EINVAL;
1097 goto end;
1098 }
1099
1100 opts->isoc_maxburst = num;
1101 ret = len;
1102end:
1103 mutex_unlock(&opts->lock);
1104 return ret;
1105}
1106
1107CONFIGFS_ATTR(f_ss_opts_, isoc_maxburst);
1108
1109static ssize_t f_ss_opts_bulk_buflen_show(struct config_item *item, char *page)
1110{
1111 struct f_ss_opts *opts = to_f_ss_opts(item);
1112 int result;
1113
1114 mutex_lock(&opts->lock);
1115 result = sprintf(page, "%u\n", opts->bulk_buflen);
1116 mutex_unlock(&opts->lock);
1117
1118 return result;
1119}
1120
1121static ssize_t f_ss_opts_bulk_buflen_store(struct config_item *item,
1122 const char *page, size_t len)
1123{
1124 struct f_ss_opts *opts = to_f_ss_opts(item);
1125 int ret;
1126 u32 num;
1127
1128 mutex_lock(&opts->lock);
1129 if (opts->refcnt) {
1130 ret = -EBUSY;
1131 goto end;
1132 }
1133
1134 ret = kstrtou32(page, 0, &num);
1135 if (ret)
1136 goto end;
1137
1138 opts->bulk_buflen = num;
1139 ret = len;
1140end:
1141 mutex_unlock(&opts->lock);
1142 return ret;
1143}
1144
1145CONFIGFS_ATTR(f_ss_opts_, bulk_buflen);
1146
1147static ssize_t f_ss_opts_bulk_qlen_show(struct config_item *item, char *page)
1148{
1149 struct f_ss_opts *opts = to_f_ss_opts(item);
1150 int result;
1151
1152 mutex_lock(&opts->lock);
1153 result = sprintf(page, "%u\n", opts->bulk_qlen);
1154 mutex_unlock(&opts->lock);
1155
1156 return result;
1157}
1158
1159static ssize_t f_ss_opts_bulk_qlen_store(struct config_item *item,
1160 const char *page, size_t len)
1161{
1162 struct f_ss_opts *opts = to_f_ss_opts(item);
1163 int ret;
1164 u32 num;
1165
1166 mutex_lock(&opts->lock);
1167 if (opts->refcnt) {
1168 ret = -EBUSY;
1169 goto end;
1170 }
1171
1172 ret = kstrtou32(page, 0, &num);
1173 if (ret)
1174 goto end;
1175
1176 opts->bulk_qlen = num;
1177 ret = len;
1178end:
1179 mutex_unlock(&opts->lock);
1180 return ret;
1181}
1182
1183CONFIGFS_ATTR(f_ss_opts_, bulk_qlen);
1184
1185static ssize_t f_ss_opts_iso_qlen_show(struct config_item *item, char *page)
1186{
1187 struct f_ss_opts *opts = to_f_ss_opts(item);
1188 int result;
1189
1190 mutex_lock(&opts->lock);
1191 result = sprintf(page, "%u\n", opts->iso_qlen);
1192 mutex_unlock(&opts->lock);
1193
1194 return result;
1195}
1196
1197static ssize_t f_ss_opts_iso_qlen_store(struct config_item *item,
1198 const char *page, size_t len)
1199{
1200 struct f_ss_opts *opts = to_f_ss_opts(item);
1201 int ret;
1202 u32 num;
1203
1204 mutex_lock(&opts->lock);
1205 if (opts->refcnt) {
1206 ret = -EBUSY;
1207 goto end;
1208 }
1209
1210 ret = kstrtou32(page, 0, &num);
1211 if (ret)
1212 goto end;
1213
1214 opts->iso_qlen = num;
1215 ret = len;
1216end:
1217 mutex_unlock(&opts->lock);
1218 return ret;
1219}
1220
1221CONFIGFS_ATTR(f_ss_opts_, iso_qlen);
1222
1223static struct configfs_attribute *ss_attrs[] = {
1224 &f_ss_opts_attr_pattern,
1225 &f_ss_opts_attr_isoc_interval,
1226 &f_ss_opts_attr_isoc_maxpacket,
1227 &f_ss_opts_attr_isoc_mult,
1228 &f_ss_opts_attr_isoc_maxburst,
1229 &f_ss_opts_attr_bulk_buflen,
1230 &f_ss_opts_attr_bulk_qlen,
1231 &f_ss_opts_attr_iso_qlen,
1232 NULL,
1233};
1234
1235static struct config_item_type ss_func_type = {
1236 .ct_item_ops = &ss_item_ops,
1237 .ct_attrs = ss_attrs,
1238 .ct_owner = THIS_MODULE,
1239};
1240
1241static void source_sink_free_instance(struct usb_function_instance *fi)
1242{
1243 struct f_ss_opts *ss_opts;
1244
1245 ss_opts = container_of(fi, struct f_ss_opts, func_inst);
1246 kfree(ss_opts);
1247}
1248
1249static struct usb_function_instance *source_sink_alloc_inst(void)
1250{
1251 struct f_ss_opts *ss_opts;
1252
1253 ss_opts = kzalloc(sizeof(*ss_opts), GFP_KERNEL);
1254 if (!ss_opts)
1255 return ERR_PTR(-ENOMEM);
1256 mutex_init(&ss_opts->lock);
1257 ss_opts->func_inst.free_func_inst = source_sink_free_instance;
1258 ss_opts->isoc_interval = GZERO_ISOC_INTERVAL;
1259 ss_opts->isoc_maxpacket = GZERO_ISOC_MAXPACKET;
1260 ss_opts->bulk_buflen = GZERO_BULK_BUFLEN;
1261 ss_opts->bulk_qlen = GZERO_SS_BULK_QLEN;
1262 ss_opts->iso_qlen = GZERO_SS_ISO_QLEN;
1263
1264 config_group_init_type_name(&ss_opts->func_inst.group, "",
1265 &ss_func_type);
1266
1267 return &ss_opts->func_inst;
1268}
1269DECLARE_USB_FUNCTION(SourceSink, source_sink_alloc_inst,
1270 source_sink_alloc_func);
1271
1272static int __init sslb_modinit(void)
1273{
1274 int ret;
1275
1276 ret = usb_function_register(&SourceSinkusb_func);
1277 if (ret)
1278 return ret;
1279 ret = lb_modinit();
1280 if (ret)
1281 usb_function_unregister(&SourceSinkusb_func);
1282 return ret;
1283}
1284static void __exit sslb_modexit(void)
1285{
1286 usb_function_unregister(&SourceSinkusb_func);
1287 lb_modexit();
1288}
1289module_init(sslb_modinit);
1290module_exit(sslb_modexit);
1291
1292MODULE_LICENSE("GPL");