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usb: gadget: add some infracture to register/unregister functions
[mirror_ubuntu-bionic-kernel.git] / drivers / usb / gadget / f_sourcesink.c
CommitLineData
a400cadc
DB		 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.
a400cadc
DB		 11 */
12
13/* #define VERBOSE_DEBUG */
14
5a0e3ad6 15#include <linux/slab.h>
a400cadc 16#include <linux/kernel.h>
a400cadc 17#include <linux/device.h>
6eb0de82 18#include <linux/module.h>
a400cadc
DB		 19
20#include "g_zero.h"
21#include "gadget_chips.h"
22
23
24/*
25 * SOURCE/SINK FUNCTION ... a primary testing vehicle for USB peripheral
26 * controller drivers.
27 *
28 * This just sinks bulk packets OUT to the peripheral and sources them IN
29 * to the host, optionally with specific data patterns for integrity tests.
30 * As such it supports basic functionality and load tests.
31 *
32 * In terms of control messaging, this supports all the standard requests
33 * plus two that support control-OUT tests. If the optional "autoresume"
34 * mode is enabled, it provides good functional coverage for the "USBCV"
35 * test harness from USB-IF.
36 *
37 * Note that because this doesn't queue more than one request at a time,
38 * some other function must be used to test queueing logic. The network
39 * link (g_ether) is the best overall option for that, since its TX and RX
40 * queues are relatively independent, will receive a range of packet sizes,
41 * and can often be made to run out completely. Those issues are important
42 * when stress testing peripheral controller drivers.
43 *
44 *
45 * This is currently packaged as a configuration driver, which can't be
46 * combined with other functions to make composite devices. However, it
47 * can be combined with other independent configurations.
48 */
49struct f_sourcesink {
50 struct usb_function function;
51
52 struct usb_ep *in_ep;
53 struct usb_ep *out_ep;
b4036ccd
PZ		 54 struct usb_ep *iso_in_ep;
55 struct usb_ep *iso_out_ep;
56 int cur_alt;
a400cadc
DB		 57};
58
59static inline struct f_sourcesink *func_to_ss(struct usb_function *f)
60{
61 return container_of(f, struct f_sourcesink, function);
62}
63
a400cadc 64static unsigned pattern;
b4036ccd
PZ		 65module_param(pattern, uint, S_IRUGO|S_IWUSR);
66MODULE_PARM_DESC(pattern, "0 = all zeroes, 1 = mod63, 2 = none");
67
68static unsigned isoc_interval = 4;
69module_param(isoc_interval, uint, S_IRUGO|S_IWUSR);
70MODULE_PARM_DESC(isoc_interval, "1 - 16");
71
72static unsigned isoc_maxpacket = 1024;
73module_param(isoc_maxpacket, uint, S_IRUGO|S_IWUSR);
74MODULE_PARM_DESC(isoc_maxpacket, "0 - 1023 (fs), 0 - 1024 (hs/ss)");
75
76static unsigned isoc_mult;
77module_param(isoc_mult, uint, S_IRUGO|S_IWUSR);
78MODULE_PARM_DESC(isoc_mult, "0 - 2 (hs/ss only)");
79
80static unsigned isoc_maxburst;
81module_param(isoc_maxburst, uint, S_IRUGO|S_IWUSR);
82MODULE_PARM_DESC(isoc_maxburst, "0 - 15 (ss only)");
a400cadc
DB		 83
84/*-------------------------------------------------------------------------*/
85
b4036ccd
PZ		 86static struct usb_interface_descriptor source_sink_intf_alt0 = {
87 .bLength = USB_DT_INTERFACE_SIZE,
a400cadc
DB		 88 .bDescriptorType = USB_DT_INTERFACE,
89
b4036ccd 90 .bAlternateSetting = 0,
a400cadc
DB		 91 .bNumEndpoints = 2,
92 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
b4036ccd
PZ		 93 /* .iInterface = DYNAMIC */
94};
95
96static struct usb_interface_descriptor source_sink_intf_alt1 = {
97 .bLength = USB_DT_INTERFACE_SIZE,
98 .bDescriptorType = USB_DT_INTERFACE,
99
100 .bAlternateSetting = 1,
101 .bNumEndpoints = 4,
102 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
103 /* .iInterface = DYNAMIC */
a400cadc
DB		 104};
105
106/* full speed support: */
107
108static struct usb_endpoint_descriptor fs_source_desc = {
109 .bLength = USB_DT_ENDPOINT_SIZE,
110 .bDescriptorType = USB_DT_ENDPOINT,
111
112 .bEndpointAddress = USB_DIR_IN,
113 .bmAttributes = USB_ENDPOINT_XFER_BULK,
114};
115
116static struct usb_endpoint_descriptor fs_sink_desc = {
117 .bLength = USB_DT_ENDPOINT_SIZE,
118 .bDescriptorType = USB_DT_ENDPOINT,
119
120 .bEndpointAddress = USB_DIR_OUT,
121 .bmAttributes = USB_ENDPOINT_XFER_BULK,
122};
123
b4036ccd
PZ		 124static struct usb_endpoint_descriptor fs_iso_source_desc = {
125 .bLength = USB_DT_ENDPOINT_SIZE,
126 .bDescriptorType = USB_DT_ENDPOINT,
127
128 .bEndpointAddress = USB_DIR_IN,
129 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
130 .wMaxPacketSize = cpu_to_le16(1023),
131 .bInterval = 4,
132};
133
134static struct usb_endpoint_descriptor fs_iso_sink_desc = {
135 .bLength = USB_DT_ENDPOINT_SIZE,
136 .bDescriptorType = USB_DT_ENDPOINT,
137
138 .bEndpointAddress = USB_DIR_OUT,
139 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
140 .wMaxPacketSize = cpu_to_le16(1023),
141 .bInterval = 4,
142};
143
a400cadc 144static struct usb_descriptor_header *fs_source_sink_descs[] = {
b4036ccd 145 (struct usb_descriptor_header *) &source_sink_intf_alt0,
a400cadc
DB		 146 (struct usb_descriptor_header *) &fs_sink_desc,
147 (struct usb_descriptor_header *) &fs_source_desc,
b4036ccd
PZ		 148 (struct usb_descriptor_header *) &source_sink_intf_alt1,
149#define FS_ALT_IFC_1_OFFSET 3
150 (struct usb_descriptor_header *) &fs_sink_desc,
151 (struct usb_descriptor_header *) &fs_source_desc,
152 (struct usb_descriptor_header *) &fs_iso_sink_desc,
153 (struct usb_descriptor_header *) &fs_iso_source_desc,
a400cadc
DB		 154 NULL,
155};
156
157/* high speed support: */
158
159static struct usb_endpoint_descriptor hs_source_desc = {
160 .bLength = USB_DT_ENDPOINT_SIZE,
161 .bDescriptorType = USB_DT_ENDPOINT,
162
163 .bmAttributes = USB_ENDPOINT_XFER_BULK,
551509d2 164 .wMaxPacketSize = cpu_to_le16(512),
a400cadc
DB		 165};
166
167static struct usb_endpoint_descriptor hs_sink_desc = {
168 .bLength = USB_DT_ENDPOINT_SIZE,
169 .bDescriptorType = USB_DT_ENDPOINT,
170
171 .bmAttributes = USB_ENDPOINT_XFER_BULK,
551509d2 172 .wMaxPacketSize = cpu_to_le16(512),
a400cadc
DB		 173};
174
b4036ccd
PZ		 175static struct usb_endpoint_descriptor hs_iso_source_desc = {
176 .bLength = USB_DT_ENDPOINT_SIZE,
177 .bDescriptorType = USB_DT_ENDPOINT,
178
179 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
180 .wMaxPacketSize = cpu_to_le16(1024),
181 .bInterval = 4,
182};
183
184static struct usb_endpoint_descriptor hs_iso_sink_desc = {
185 .bLength = USB_DT_ENDPOINT_SIZE,
186 .bDescriptorType = USB_DT_ENDPOINT,
187
188 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
189 .wMaxPacketSize = cpu_to_le16(1024),
190 .bInterval = 4,
191};
192
a400cadc 193static struct usb_descriptor_header *hs_source_sink_descs[] = {
b4036ccd 194 (struct usb_descriptor_header *) &source_sink_intf_alt0,
a400cadc
DB		 195 (struct usb_descriptor_header *) &hs_source_desc,
196 (struct usb_descriptor_header *) &hs_sink_desc,
b4036ccd
PZ		 197 (struct usb_descriptor_header *) &source_sink_intf_alt1,
198#define HS_ALT_IFC_1_OFFSET 3
199 (struct usb_descriptor_header *) &hs_source_desc,
200 (struct usb_descriptor_header *) &hs_sink_desc,
201 (struct usb_descriptor_header *) &hs_iso_source_desc,
202 (struct usb_descriptor_header *) &hs_iso_sink_desc,
a400cadc
DB		 203 NULL,
204};
205
57c97c02
AB		 206/* super speed support: */
207
208static struct usb_endpoint_descriptor ss_source_desc = {
209 .bLength = USB_DT_ENDPOINT_SIZE,
210 .bDescriptorType = USB_DT_ENDPOINT,
211
212 .bmAttributes = USB_ENDPOINT_XFER_BULK,
213 .wMaxPacketSize = cpu_to_le16(1024),
214};
215
216struct usb_ss_ep_comp_descriptor ss_source_comp_desc = {
217 .bLength = USB_DT_SS_EP_COMP_SIZE,
218 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
b4036ccd 219
57c97c02
AB		 220 .bMaxBurst = 0,
221 .bmAttributes = 0,
222 .wBytesPerInterval = 0,
223};
224
225static struct usb_endpoint_descriptor ss_sink_desc = {
226 .bLength = USB_DT_ENDPOINT_SIZE,
227 .bDescriptorType = USB_DT_ENDPOINT,
228
229 .bmAttributes = USB_ENDPOINT_XFER_BULK,
230 .wMaxPacketSize = cpu_to_le16(1024),
231};
232
233struct usb_ss_ep_comp_descriptor ss_sink_comp_desc = {
234 .bLength = USB_DT_SS_EP_COMP_SIZE,
235 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
b4036ccd 236
57c97c02
AB		 237 .bMaxBurst = 0,
238 .bmAttributes = 0,
239 .wBytesPerInterval = 0,
240};
241
b4036ccd
PZ		 242static struct usb_endpoint_descriptor ss_iso_source_desc = {
243 .bLength = USB_DT_ENDPOINT_SIZE,
244 .bDescriptorType = USB_DT_ENDPOINT,
245
246 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
247 .wMaxPacketSize = cpu_to_le16(1024),
248 .bInterval = 4,
249};
250
251struct usb_ss_ep_comp_descriptor ss_iso_source_comp_desc = {
252 .bLength = USB_DT_SS_EP_COMP_SIZE,
253 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
254
255 .bMaxBurst = 0,
256 .bmAttributes = 0,
257 .wBytesPerInterval = cpu_to_le16(1024),
258};
259
260static struct usb_endpoint_descriptor ss_iso_sink_desc = {
261 .bLength = USB_DT_ENDPOINT_SIZE,
262 .bDescriptorType = USB_DT_ENDPOINT,
263
264 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
265 .wMaxPacketSize = cpu_to_le16(1024),
266 .bInterval = 4,
267};
268
269struct usb_ss_ep_comp_descriptor ss_iso_sink_comp_desc = {
270 .bLength = USB_DT_SS_EP_COMP_SIZE,
271 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
272
273 .bMaxBurst = 0,
274 .bmAttributes = 0,
275 .wBytesPerInterval = cpu_to_le16(1024),
276};
277
57c97c02 278static struct usb_descriptor_header *ss_source_sink_descs[] = {
b4036ccd 279 (struct usb_descriptor_header *) &source_sink_intf_alt0,
57c97c02
AB		 280 (struct usb_descriptor_header *) &ss_source_desc,
281 (struct usb_descriptor_header *) &ss_source_comp_desc,
282 (struct usb_descriptor_header *) &ss_sink_desc,
283 (struct usb_descriptor_header *) &ss_sink_comp_desc,
b4036ccd
PZ		 284 (struct usb_descriptor_header *) &source_sink_intf_alt1,
285#define SS_ALT_IFC_1_OFFSET 5
286 (struct usb_descriptor_header *) &ss_source_desc,
287 (struct usb_descriptor_header *) &ss_source_comp_desc,
288 (struct usb_descriptor_header *) &ss_sink_desc,
289 (struct usb_descriptor_header *) &ss_sink_comp_desc,
290 (struct usb_descriptor_header *) &ss_iso_source_desc,
291 (struct usb_descriptor_header *) &ss_iso_source_comp_desc,
292 (struct usb_descriptor_header *) &ss_iso_sink_desc,
293 (struct usb_descriptor_header *) &ss_iso_sink_comp_desc,
57c97c02
AB		 294 NULL,
295};
296
a400cadc
DB		 297/* function-specific strings: */
298
299static struct usb_string strings_sourcesink[] = {
300 [0].s = "source and sink data",
301 { } /* end of list */
302};
303
304static struct usb_gadget_strings stringtab_sourcesink = {
305 .language = 0x0409, /* en-us */
306 .strings = strings_sourcesink,
307};
308
309static struct usb_gadget_strings *sourcesink_strings[] = {
310 &stringtab_sourcesink,
311 NULL,
312};
313
314/*-------------------------------------------------------------------------*/
315
a400cadc
DB		 316static int __init
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;
10287bae 322 int ret;
a400cadc
DB		 323
324 /* allocate interface ID(s) */
325 id = usb_interface_id(c, f);
326 if (id < 0)
327 return id;
b4036ccd
PZ		 328 source_sink_intf_alt0.bInterfaceNumber = id;
329 source_sink_intf_alt1.bInterfaceNumber = id;
a400cadc 330
eeae5407
SAS		 331 /* allocate string ID(s) */
332 id = usb_string_id(cdev);
333 if (id < 0)
334 return id;
335 strings_sourcesink[0].id = id;
336 source_sink_intf_alt0.iInterface = id;
337 source_sink_intf_alt1.iInterface = id;
338
b4036ccd 339 /* allocate bulk endpoints */
a400cadc
DB		 340 ss->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc);
341 if (!ss->in_ep) {
342autoconf_fail:
343 ERROR(cdev, "%s: can't autoconfigure on %s\n",
344 f->name, cdev->gadget->name);
345 return -ENODEV;
346 }
347 ss->in_ep->driver_data = cdev; /* claim */
348
349 ss->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_sink_desc);
350 if (!ss->out_ep)
351 goto autoconf_fail;
352 ss->out_ep->driver_data = cdev; /* claim */
353
b4036ccd
PZ		 354 /* sanity check the isoc module parameters */
355 if (isoc_interval < 1)
356 isoc_interval = 1;
357 if (isoc_interval > 16)
358 isoc_interval = 16;
359 if (isoc_mult > 2)
360 isoc_mult = 2;
361 if (isoc_maxburst > 15)
362 isoc_maxburst = 15;
363
364 /* fill in the FS isoc descriptors from the module parameters */
365 fs_iso_source_desc.wMaxPacketSize = isoc_maxpacket > 1023 ?
366 1023 : isoc_maxpacket;
367 fs_iso_source_desc.bInterval = isoc_interval;
368 fs_iso_sink_desc.wMaxPacketSize = isoc_maxpacket > 1023 ?
369 1023 : isoc_maxpacket;
370 fs_iso_sink_desc.bInterval = isoc_interval;
371
372 /* allocate iso endpoints */
373 ss->iso_in_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_source_desc);
374 if (!ss->iso_in_ep)
375 goto no_iso;
376 ss->iso_in_ep->driver_data = cdev; /* claim */
377
378 ss->iso_out_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_sink_desc);
379 if (ss->iso_out_ep) {
380 ss->iso_out_ep->driver_data = cdev; /* claim */
381 } else {
382 ss->iso_in_ep->driver_data = NULL;
383 ss->iso_in_ep = NULL;
384no_iso:
385 /*
386 * We still want to work even if the UDC doesn't have isoc
387 * endpoints, so null out the alt interface that contains
388 * them and continue.
389 */
390 fs_source_sink_descs[FS_ALT_IFC_1_OFFSET] = NULL;
391 hs_source_sink_descs[HS_ALT_IFC_1_OFFSET] = NULL;
392 ss_source_sink_descs[SS_ALT_IFC_1_OFFSET] = NULL;
393 }
394
395 if (isoc_maxpacket > 1024)
396 isoc_maxpacket = 1024;
397
a400cadc 398 /* support high speed hardware */
10287bae
SAS		 399 hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
400 hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
401
402 /*
403 * Fill in the HS isoc descriptors from the module parameters.
404 * We assume that the user knows what they are doing and won't
405 * give parameters that their UDC doesn't support.
406 */
407 hs_iso_source_desc.wMaxPacketSize = isoc_maxpacket;
408 hs_iso_source_desc.wMaxPacketSize |= isoc_mult << 11;
409 hs_iso_source_desc.bInterval = isoc_interval;
410 hs_iso_source_desc.bEndpointAddress =
411 fs_iso_source_desc.bEndpointAddress;
412
413 hs_iso_sink_desc.wMaxPacketSize = isoc_maxpacket;
414 hs_iso_sink_desc.wMaxPacketSize |= isoc_mult << 11;
415 hs_iso_sink_desc.bInterval = isoc_interval;
416 hs_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
a400cadc 417
57c97c02 418 /* support super speed hardware */
10287bae
SAS		 419 ss_source_desc.bEndpointAddress =
420 fs_source_desc.bEndpointAddress;
421 ss_sink_desc.bEndpointAddress =
422 fs_sink_desc.bEndpointAddress;
423
424 /*
425 * Fill in the SS isoc descriptors from the module parameters.
426 * We assume that the user knows what they are doing and won't
427 * give parameters that their UDC doesn't support.
428 */
429 ss_iso_source_desc.wMaxPacketSize = isoc_maxpacket;
430 ss_iso_source_desc.bInterval = isoc_interval;
431 ss_iso_source_comp_desc.bmAttributes = isoc_mult;
432 ss_iso_source_comp_desc.bMaxBurst = isoc_maxburst;
433 ss_iso_source_comp_desc.wBytesPerInterval =
434 isoc_maxpacket * (isoc_mult + 1) * (isoc_maxburst + 1);
435 ss_iso_source_desc.bEndpointAddress =
436 fs_iso_source_desc.bEndpointAddress;
437
438 ss_iso_sink_desc.wMaxPacketSize = isoc_maxpacket;
439 ss_iso_sink_desc.bInterval = isoc_interval;
440 ss_iso_sink_comp_desc.bmAttributes = isoc_mult;
441 ss_iso_sink_comp_desc.bMaxBurst = isoc_maxburst;
442 ss_iso_sink_comp_desc.wBytesPerInterval =
443 isoc_maxpacket * (isoc_mult + 1) * (isoc_maxburst + 1);
444 ss_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
445
446 ret = usb_assign_descriptors(f, fs_source_sink_descs,
447 hs_source_sink_descs, ss_source_sink_descs);
448 if (ret)
449 return ret;
57c97c02 450
b4036ccd 451 DBG(cdev, "%s speed %s: IN/%s, OUT/%s, ISO-IN/%s, ISO-OUT/%s\n",
57c97c02
AB		 452 (gadget_is_superspeed(c->cdev->gadget) ? "super" :
453 (gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full")),
b4036ccd
PZ		 454 f->name, ss->in_ep->name, ss->out_ep->name,
455 ss->iso_in_ep ? ss->iso_in_ep->name : "<none>",
456 ss->iso_out_ep ? ss->iso_out_ep->name : "<none>");
a400cadc
DB		 457 return 0;
458}
459
544aca39
SAS		 460static struct usb_function *global_ss_func;
461
a400cadc
DB		 462static void
463sourcesink_unbind(struct usb_configuration *c, struct usb_function *f)
464{
10287bae 465 usb_free_all_descriptors(f);
a400cadc 466 kfree(func_to_ss(f));
544aca39 467 global_ss_func = NULL;
a400cadc
DB		 468}
469
470/* optionally require specific source/sink data patterns */
471static int check_read_data(struct f_sourcesink *ss, struct usb_request *req)
472{
473 unsigned i;
474 u8 *buf = req->buf;
475 struct usb_composite_dev *cdev = ss->function.config->cdev;
476
b4036ccd
PZ		 477 if (pattern == 2)
478 return 0;
479
a400cadc
DB		 480 for (i = 0; i < req->actual; i++, buf++) {
481 switch (pattern) {
482
483 /* all-zeroes has no synchronization issues */
484 case 0:
485 if (*buf == 0)
486 continue;
487 break;
488
489 /* "mod63" stays in sync with short-terminated transfers,
490 * OR otherwise when host and gadget agree on how large
491 * each usb transfer request should be. Resync is done
492 * with set_interface or set_config. (We *WANT* it to
493 * get quickly out of sync if controllers or their drivers
b4036ccd 494 * stutter for any reason, including buffer duplication...)
a400cadc
DB		 495 */
496 case 1:
497 if (*buf == (u8)(i % 63))
498 continue;
499 break;
500 }
501 ERROR(cdev, "bad OUT byte, buf[%d] = %d\n", i, *buf);
502 usb_ep_set_halt(ss->out_ep);
503 return -EINVAL;
504 }
505 return 0;
506}
507
508static void reinit_write_data(struct usb_ep *ep, struct usb_request *req)
509{
510 unsigned i;
511 u8 *buf = req->buf;
512
513 switch (pattern) {
514 case 0:
515 memset(req->buf, 0, req->length);
516 break;
517 case 1:
518 for (i = 0; i < req->length; i++)
519 *buf++ = (u8) (i % 63);
520 break;
b4036ccd
PZ		 521 case 2:
522 break;
a400cadc
DB		 523 }
524}
525
526static void source_sink_complete(struct usb_ep *ep, struct usb_request *req)
527{
b4036ccd
PZ		 528 struct usb_composite_dev *cdev;
529 struct f_sourcesink *ss = ep->driver_data;
530 int status = req->status;
531
532 /* driver_data will be null if ep has been disabled */
533 if (!ss)
534 return;
535
536 cdev = ss->function.config->cdev;
a400cadc
DB		 537
538 switch (status) {
539
540 case 0: /* normal completion? */
541 if (ep == ss->out_ep) {
542 check_read_data(ss, req);
b4036ccd
PZ		 543 if (pattern != 2)
544 memset(req->buf, 0x55, req->length);
32c9cf22 545 }
a400cadc
DB		 546 break;
547
548 /* this endpoint is normally active while we're configured */
549 case -ECONNABORTED: /* hardware forced ep reset */
550 case -ECONNRESET: /* request dequeued */
551 case -ESHUTDOWN: /* disconnect from host */
552 VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status,
553 req->actual, req->length);
554 if (ep == ss->out_ep)
555 check_read_data(ss, req);
556 free_ep_req(ep, req);
557 return;
558
559 case -EOVERFLOW: /* buffer overrun on read means that
560 * we didn't provide a big enough
561 * buffer.
562 */
563 default:
564#if 1
565 DBG(cdev, "%s complete --> %d, %d/%d\n", ep->name,
566 status, req->actual, req->length);
567#endif
568 case -EREMOTEIO: /* short read */
569 break;
570 }
571
572 status = usb_ep_queue(ep, req, GFP_ATOMIC);
573 if (status) {
574 ERROR(cdev, "kill %s: resubmit %d bytes --> %d\n",
575 ep->name, req->length, status);
576 usb_ep_set_halt(ep);
577 /* FIXME recover later ... somehow */
578 }
579}
580
b4036ccd
PZ		 581static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in,
582 bool is_iso, int speed)
a400cadc
DB		 583{
584 struct usb_ep *ep;
585 struct usb_request *req;
b4036ccd
PZ		 586 int i, size, status;
587
588 for (i = 0; i < 8; i++) {
589 if (is_iso) {
590 switch (speed) {
591 case USB_SPEED_SUPER:
592 size = isoc_maxpacket * (isoc_mult + 1) *
593 (isoc_maxburst + 1);
594 break;
595 case USB_SPEED_HIGH:
596 size = isoc_maxpacket * (isoc_mult + 1);
597 break;
598 default:
599 size = isoc_maxpacket > 1023 ?
600 1023 : isoc_maxpacket;
601 break;
602 }
603 ep = is_in ? ss->iso_in_ep : ss->iso_out_ep;
604 req = alloc_ep_req(ep, size);
605 } else {
606 ep = is_in ? ss->in_ep : ss->out_ep;
607 req = alloc_ep_req(ep, 0);
608 }
a400cadc 609
b4036ccd
PZ		 610 if (!req)
611 return -ENOMEM;
a400cadc 612
b4036ccd
PZ		 613 req->complete = source_sink_complete;
614 if (is_in)
615 reinit_write_data(ep, req);
616 else if (pattern != 2)
617 memset(req->buf, 0x55, req->length);
a400cadc 618
b4036ccd
PZ		 619 status = usb_ep_queue(ep, req, GFP_ATOMIC);
620 if (status) {
621 struct usb_composite_dev *cdev;
a400cadc 622
b4036ccd
PZ		 623 cdev = ss->function.config->cdev;
624 ERROR(cdev, "start %s%s %s --> %d\n",
625 is_iso ? "ISO-" : "", is_in ? "IN" : "OUT",
626 ep->name, status);
627 free_ep_req(ep, req);
628 }
629
630 if (!is_iso)
631 break;
a400cadc
DB		 632 }
633
634 return status;
635}
636
637static void disable_source_sink(struct f_sourcesink *ss)
638{
639 struct usb_composite_dev *cdev;
640
641 cdev = ss->function.config->cdev;
b4036ccd
PZ		 642 disable_endpoints(cdev, ss->in_ep, ss->out_ep, ss->iso_in_ep,
643 ss->iso_out_ep);
a400cadc
DB		 644 VDBG(cdev, "%s disabled\n", ss->function.name);
645}
646
647static int
b4036ccd
PZ		 648enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss,
649 int alt)
a400cadc
DB		 650{
651 int result = 0;
b4036ccd 652 int speed = cdev->gadget->speed;
a400cadc
DB		 653 struct usb_ep *ep;
654
b4036ccd 655 /* one bulk endpoint writes (sources) zeroes IN (to the host) */
a400cadc 656 ep = ss->in_ep;
ea2a1df7
TB		 657 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
658 if (result)
659 return result;
72c973dd 660 result = usb_ep_enable(ep);
a400cadc
DB		 661 if (result < 0)
662 return result;
663 ep->driver_data = ss;
664
b4036ccd 665 result = source_sink_start_ep(ss, true, false, speed);
a400cadc
DB		 666 if (result < 0) {
667fail:
668 ep = ss->in_ep;
669 usb_ep_disable(ep);
670 ep->driver_data = NULL;
671 return result;
672 }
673
b4036ccd 674 /* one bulk endpoint reads (sinks) anything OUT (from the host) */
a400cadc 675 ep = ss->out_ep;
ea2a1df7
TB		 676 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
677 if (result)
678 goto fail;
72c973dd 679 result = usb_ep_enable(ep);
a400cadc
DB		 680 if (result < 0)
681 goto fail;
682 ep->driver_data = ss;
683
b4036ccd 684 result = source_sink_start_ep(ss, false, false, speed);
a400cadc 685 if (result < 0) {
b4036ccd
PZ		 686fail2:
687 ep = ss->out_ep;
a400cadc
DB		 688 usb_ep_disable(ep);
689 ep->driver_data = NULL;
690 goto fail;
691 }
692
b4036ccd
PZ		 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 ep->driver_data = NULL;
714 }
715 goto fail2;
716 }
717 }
718
719 /* one iso endpoint reads (sinks) anything OUT (from the host) */
720 ep = ss->iso_out_ep;
721 if (ep) {
722 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
723 if (result)
724 goto fail3;
725 result = usb_ep_enable(ep);
726 if (result < 0)
727 goto fail3;
728 ep->driver_data = ss;
729
730 result = source_sink_start_ep(ss, false, true, speed);
731 if (result < 0) {
732 usb_ep_disable(ep);
733 ep->driver_data = NULL;
734 goto fail3;
735 }
736 }
737out:
738 ss->cur_alt = alt;
739
740 DBG(cdev, "%s enabled, alt intf %d\n", ss->function.name, alt);
a400cadc
DB		 741 return result;
742}
743
744static int sourcesink_set_alt(struct usb_function *f,
745 unsigned intf, unsigned alt)
746{
b4036ccd
PZ		 747 struct f_sourcesink *ss = func_to_ss(f);
748 struct usb_composite_dev *cdev = f->config->cdev;
a400cadc 749
a400cadc
DB		 750 if (ss->in_ep->driver_data)
751 disable_source_sink(ss);
b4036ccd
PZ		 752 return enable_source_sink(cdev, ss, alt);
753}
754
755static int sourcesink_get_alt(struct usb_function *f, unsigned intf)
756{
757 struct f_sourcesink *ss = func_to_ss(f);
758
759 return ss->cur_alt;
a400cadc
DB		 760}
761
762static void sourcesink_disable(struct usb_function *f)
763{
764 struct f_sourcesink *ss = func_to_ss(f);
765
766 disable_source_sink(ss);
767}
768
a400cadc 769/*-------------------------------------------------------------------------*/
544aca39 770static int sourcesink_setup(struct usb_function *f,
a400cadc
DB		 771 const struct usb_ctrlrequest *ctrl)
772{
544aca39 773 struct usb_configuration *c = f->config;
a400cadc
DB		 774 struct usb_request *req = c->cdev->req;
775 int value = -EOPNOTSUPP;
776 u16 w_index = le16_to_cpu(ctrl->wIndex);
777 u16 w_value = le16_to_cpu(ctrl->wValue);
778 u16 w_length = le16_to_cpu(ctrl->wLength);
779
e13f17ff 780 req->length = USB_COMP_EP0_BUFSIZ;
5030ec73 781
a400cadc
DB		 782 /* composite driver infrastructure handles everything except
783 * the two control test requests.
784 */
785 switch (ctrl->bRequest) {
786
787 /*
788 * These are the same vendor-specific requests supported by
789 * Intel's USB 2.0 compliance test devices. We exceed that
790 * device spec by allowing multiple-packet requests.
791 *
792 * NOTE: the Control-OUT data stays in req->buf ... better
793 * would be copying it into a scratch buffer, so that other
794 * requests may safely intervene.
795 */
796 case 0x5b: /* control WRITE test -- fill the buffer */
797 if (ctrl->bRequestType != (USB_DIR_OUT|USB_TYPE_VENDOR))
798 goto unknown;
799 if (w_value || w_index)
800 break;
801 /* just read that many bytes into the buffer */
802 if (w_length > req->length)
803 break;
804 value = w_length;
805 break;
806 case 0x5c: /* control READ test -- return the buffer */
807 if (ctrl->bRequestType != (USB_DIR_IN|USB_TYPE_VENDOR))
808 goto unknown;
809 if (w_value || w_index)
810 break;
811 /* expect those bytes are still in the buffer; send back */
812 if (w_length > req->length)
813 break;
814 value = w_length;
815 break;
816
817 default:
818unknown:
819 VDBG(c->cdev,
820 "unknown control req%02x.%02x v%04x i%04x l%d\n",
821 ctrl->bRequestType, ctrl->bRequest,
822 w_value, w_index, w_length);
823 }
824
825 /* respond with data transfer or status phase? */
826 if (value >= 0) {
827 VDBG(c->cdev, "source/sink req%02x.%02x v%04x i%04x l%d\n",
828 ctrl->bRequestType, ctrl->bRequest,
829 w_value, w_index, w_length);
830 req->zero = 0;
831 req->length = value;
832 value = usb_ep_queue(c->cdev->gadget->ep0, req, GFP_ATOMIC);
833 if (value < 0)
b4036ccd 834 ERROR(c->cdev, "source/sink response, err %d\n",
a400cadc
DB		 835 value);
836 }
837
838 /* device either stalls (value < 0) or reports success */
839 return value;
840}
841
544aca39
SAS		 842static int __init sourcesink_bind_config(struct usb_configuration *c)
843{
844 struct f_sourcesink *ss;
845 int status;
846
847 ss = kzalloc(sizeof(*ss), GFP_KERNEL);
848 if (!ss)
849 return -ENOMEM;
850
851 global_ss_func = &ss->function;
852
853 ss->function.name = "source/sink";
854 ss->function.bind = sourcesink_bind;
855 ss->function.unbind = sourcesink_unbind;
856 ss->function.set_alt = sourcesink_set_alt;
857 ss->function.get_alt = sourcesink_get_alt;
858 ss->function.disable = sourcesink_disable;
859 ss->function.setup = sourcesink_setup;
860
861 status = usb_add_function(c, &ss->function);
862 if (status)
863 kfree(ss);
864 return status;
865}
866
867static int ss_config_setup(struct usb_configuration *c,
868 const struct usb_ctrlrequest *ctrl)
869{
870 if (!global_ss_func)
871 return -EOPNOTSUPP;
872 switch (ctrl->bRequest) {
873 case 0x5b:
874 case 0x5c:
875 return global_ss_func->setup(global_ss_func, ctrl);
876 default:
877 return -EOPNOTSUPP;
878 }
879}
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