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usb: gadget: remove u32 castings of address passed to readl()
[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
b4036ccd 331 /* allocate bulk endpoints */
a400cadc
DB		 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 ss->in_ep->driver_data = cdev; /* claim */
340
341 ss->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_sink_desc);
342 if (!ss->out_ep)
343 goto autoconf_fail;
344 ss->out_ep->driver_data = cdev; /* claim */
345
b4036ccd
PZ		 346 /* sanity check the isoc module parameters */
347 if (isoc_interval < 1)
348 isoc_interval = 1;
349 if (isoc_interval > 16)
350 isoc_interval = 16;
351 if (isoc_mult > 2)
352 isoc_mult = 2;
353 if (isoc_maxburst > 15)
354 isoc_maxburst = 15;
355
356 /* fill in the FS isoc descriptors from the module parameters */
357 fs_iso_source_desc.wMaxPacketSize = isoc_maxpacket > 1023 ?
358 1023 : isoc_maxpacket;
359 fs_iso_source_desc.bInterval = isoc_interval;
360 fs_iso_sink_desc.wMaxPacketSize = isoc_maxpacket > 1023 ?
361 1023 : isoc_maxpacket;
362 fs_iso_sink_desc.bInterval = isoc_interval;
363
364 /* allocate iso endpoints */
365 ss->iso_in_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_source_desc);
366 if (!ss->iso_in_ep)
367 goto no_iso;
368 ss->iso_in_ep->driver_data = cdev; /* claim */
369
370 ss->iso_out_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_sink_desc);
371 if (ss->iso_out_ep) {
372 ss->iso_out_ep->driver_data = cdev; /* claim */
373 } else {
374 ss->iso_in_ep->driver_data = NULL;
375 ss->iso_in_ep = NULL;
376no_iso:
377 /*
378 * We still want to work even if the UDC doesn't have isoc
379 * endpoints, so null out the alt interface that contains
380 * them and continue.
381 */
382 fs_source_sink_descs[FS_ALT_IFC_1_OFFSET] = NULL;
383 hs_source_sink_descs[HS_ALT_IFC_1_OFFSET] = NULL;
384 ss_source_sink_descs[SS_ALT_IFC_1_OFFSET] = NULL;
385 }
386
387 if (isoc_maxpacket > 1024)
388 isoc_maxpacket = 1024;
389
a400cadc 390 /* support high speed hardware */
10287bae
SAS		 391 hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
392 hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
393
394 /*
395 * Fill in the HS isoc descriptors from the module parameters.
396 * We assume that the user knows what they are doing and won't
397 * give parameters that their UDC doesn't support.
398 */
399 hs_iso_source_desc.wMaxPacketSize = isoc_maxpacket;
400 hs_iso_source_desc.wMaxPacketSize |= isoc_mult << 11;
401 hs_iso_source_desc.bInterval = isoc_interval;
402 hs_iso_source_desc.bEndpointAddress =
403 fs_iso_source_desc.bEndpointAddress;
404
405 hs_iso_sink_desc.wMaxPacketSize = isoc_maxpacket;
406 hs_iso_sink_desc.wMaxPacketSize |= isoc_mult << 11;
407 hs_iso_sink_desc.bInterval = isoc_interval;
408 hs_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
a400cadc 409
57c97c02 410 /* support super speed hardware */
10287bae
SAS		 411 ss_source_desc.bEndpointAddress =
412 fs_source_desc.bEndpointAddress;
413 ss_sink_desc.bEndpointAddress =
414 fs_sink_desc.bEndpointAddress;
415
416 /*
417 * Fill in the SS isoc descriptors from the module parameters.
418 * We assume that the user knows what they are doing and won't
419 * give parameters that their UDC doesn't support.
420 */
421 ss_iso_source_desc.wMaxPacketSize = isoc_maxpacket;
422 ss_iso_source_desc.bInterval = isoc_interval;
423 ss_iso_source_comp_desc.bmAttributes = isoc_mult;
424 ss_iso_source_comp_desc.bMaxBurst = isoc_maxburst;
425 ss_iso_source_comp_desc.wBytesPerInterval =
426 isoc_maxpacket * (isoc_mult + 1) * (isoc_maxburst + 1);
427 ss_iso_source_desc.bEndpointAddress =
428 fs_iso_source_desc.bEndpointAddress;
429
430 ss_iso_sink_desc.wMaxPacketSize = isoc_maxpacket;
431 ss_iso_sink_desc.bInterval = isoc_interval;
432 ss_iso_sink_comp_desc.bmAttributes = isoc_mult;
433 ss_iso_sink_comp_desc.bMaxBurst = isoc_maxburst;
434 ss_iso_sink_comp_desc.wBytesPerInterval =
435 isoc_maxpacket * (isoc_mult + 1) * (isoc_maxburst + 1);
436 ss_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
437
438 ret = usb_assign_descriptors(f, fs_source_sink_descs,
439 hs_source_sink_descs, ss_source_sink_descs);
440 if (ret)
441 return ret;
57c97c02 442
b4036ccd 443 DBG(cdev, "%s speed %s: IN/%s, OUT/%s, ISO-IN/%s, ISO-OUT/%s\n",
57c97c02
AB		 444 (gadget_is_superspeed(c->cdev->gadget) ? "super" :
445 (gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full")),
b4036ccd
PZ		 446 f->name, ss->in_ep->name, ss->out_ep->name,
447 ss->iso_in_ep ? ss->iso_in_ep->name : "<none>",
448 ss->iso_out_ep ? ss->iso_out_ep->name : "<none>");
a400cadc
DB		 449 return 0;
450}
451
452static void
453sourcesink_unbind(struct usb_configuration *c, struct usb_function *f)
454{
10287bae 455 usb_free_all_descriptors(f);
a400cadc
DB		 456 kfree(func_to_ss(f));
457}
458
459/* optionally require specific source/sink data patterns */
460static int check_read_data(struct f_sourcesink *ss, struct usb_request *req)
461{
462 unsigned i;
463 u8 *buf = req->buf;
464 struct usb_composite_dev *cdev = ss->function.config->cdev;
465
b4036ccd
PZ		 466 if (pattern == 2)
467 return 0;
468
a400cadc
DB		 469 for (i = 0; i < req->actual; i++, buf++) {
470 switch (pattern) {
471
472 /* all-zeroes has no synchronization issues */
473 case 0:
474 if (*buf == 0)
475 continue;
476 break;
477
478 /* "mod63" stays in sync with short-terminated transfers,
479 * OR otherwise when host and gadget agree on how large
480 * each usb transfer request should be. Resync is done
481 * with set_interface or set_config. (We *WANT* it to
482 * get quickly out of sync if controllers or their drivers
b4036ccd 483 * stutter for any reason, including buffer duplication...)
a400cadc
DB		 484 */
485 case 1:
486 if (*buf == (u8)(i % 63))
487 continue;
488 break;
489 }
490 ERROR(cdev, "bad OUT byte, buf[%d] = %d\n", i, *buf);
491 usb_ep_set_halt(ss->out_ep);
492 return -EINVAL;
493 }
494 return 0;
495}
496
497static void reinit_write_data(struct usb_ep *ep, struct usb_request *req)
498{
499 unsigned i;
500 u8 *buf = req->buf;
501
502 switch (pattern) {
503 case 0:
504 memset(req->buf, 0, req->length);
505 break;
506 case 1:
507 for (i = 0; i < req->length; i++)
508 *buf++ = (u8) (i % 63);
509 break;
b4036ccd
PZ		 510 case 2:
511 break;
a400cadc
DB		 512 }
513}
514
515static void source_sink_complete(struct usb_ep *ep, struct usb_request *req)
516{
b4036ccd
PZ		 517 struct usb_composite_dev *cdev;
518 struct f_sourcesink *ss = ep->driver_data;
519 int status = req->status;
520
521 /* driver_data will be null if ep has been disabled */
522 if (!ss)
523 return;
524
525 cdev = ss->function.config->cdev;
a400cadc
DB		 526
527 switch (status) {
528
529 case 0: /* normal completion? */
530 if (ep == ss->out_ep) {
531 check_read_data(ss, req);
b4036ccd
PZ		 532 if (pattern != 2)
533 memset(req->buf, 0x55, req->length);
32c9cf22 534 }
a400cadc
DB		 535 break;
536
537 /* this endpoint is normally active while we're configured */
538 case -ECONNABORTED: /* hardware forced ep reset */
539 case -ECONNRESET: /* request dequeued */
540 case -ESHUTDOWN: /* disconnect from host */
541 VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status,
542 req->actual, req->length);
543 if (ep == ss->out_ep)
544 check_read_data(ss, req);
545 free_ep_req(ep, req);
546 return;
547
548 case -EOVERFLOW: /* buffer overrun on read means that
549 * we didn't provide a big enough
550 * buffer.
551 */
552 default:
553#if 1
554 DBG(cdev, "%s complete --> %d, %d/%d\n", ep->name,
555 status, req->actual, req->length);
556#endif
557 case -EREMOTEIO: /* short read */
558 break;
559 }
560
561 status = usb_ep_queue(ep, req, GFP_ATOMIC);
562 if (status) {
563 ERROR(cdev, "kill %s: resubmit %d bytes --> %d\n",
564 ep->name, req->length, status);
565 usb_ep_set_halt(ep);
566 /* FIXME recover later ... somehow */
567 }
568}
569
b4036ccd
PZ		 570static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in,
571 bool is_iso, int speed)
a400cadc
DB		 572{
573 struct usb_ep *ep;
574 struct usb_request *req;
b4036ccd
PZ		 575 int i, size, status;
576
577 for (i = 0; i < 8; i++) {
578 if (is_iso) {
579 switch (speed) {
580 case USB_SPEED_SUPER:
581 size = isoc_maxpacket * (isoc_mult + 1) *
582 (isoc_maxburst + 1);
583 break;
584 case USB_SPEED_HIGH:
585 size = isoc_maxpacket * (isoc_mult + 1);
586 break;
587 default:
588 size = isoc_maxpacket > 1023 ?
589 1023 : isoc_maxpacket;
590 break;
591 }
592 ep = is_in ? ss->iso_in_ep : ss->iso_out_ep;
593 req = alloc_ep_req(ep, size);
594 } else {
595 ep = is_in ? ss->in_ep : ss->out_ep;
596 req = alloc_ep_req(ep, 0);
597 }
a400cadc 598
b4036ccd
PZ		 599 if (!req)
600 return -ENOMEM;
a400cadc 601
b4036ccd
PZ		 602 req->complete = source_sink_complete;
603 if (is_in)
604 reinit_write_data(ep, req);
605 else if (pattern != 2)
606 memset(req->buf, 0x55, req->length);
a400cadc 607
b4036ccd
PZ		 608 status = usb_ep_queue(ep, req, GFP_ATOMIC);
609 if (status) {
610 struct usb_composite_dev *cdev;
a400cadc 611
b4036ccd
PZ		 612 cdev = ss->function.config->cdev;
613 ERROR(cdev, "start %s%s %s --> %d\n",
614 is_iso ? "ISO-" : "", is_in ? "IN" : "OUT",
615 ep->name, status);
616 free_ep_req(ep, req);
617 }
618
619 if (!is_iso)
620 break;
a400cadc
DB		 621 }
622
623 return status;
624}
625
626static void disable_source_sink(struct f_sourcesink *ss)
627{
628 struct usb_composite_dev *cdev;
629
630 cdev = ss->function.config->cdev;
b4036ccd
PZ		 631 disable_endpoints(cdev, ss->in_ep, ss->out_ep, ss->iso_in_ep,
632 ss->iso_out_ep);
a400cadc
DB		 633 VDBG(cdev, "%s disabled\n", ss->function.name);
634}
635
636static int
b4036ccd
PZ		 637enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss,
638 int alt)
a400cadc
DB		 639{
640 int result = 0;
b4036ccd 641 int speed = cdev->gadget->speed;
a400cadc
DB		 642 struct usb_ep *ep;
643
b4036ccd 644 /* one bulk endpoint writes (sources) zeroes IN (to the host) */
a400cadc 645 ep = ss->in_ep;
ea2a1df7
TB		 646 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
647 if (result)
648 return result;
72c973dd 649 result = usb_ep_enable(ep);
a400cadc
DB		 650 if (result < 0)
651 return result;
652 ep->driver_data = ss;
653
b4036ccd 654 result = source_sink_start_ep(ss, true, false, speed);
a400cadc
DB		 655 if (result < 0) {
656fail:
657 ep = ss->in_ep;
658 usb_ep_disable(ep);
659 ep->driver_data = NULL;
660 return result;
661 }
662
b4036ccd 663 /* one bulk endpoint reads (sinks) anything OUT (from the host) */
a400cadc 664 ep = ss->out_ep;
ea2a1df7
TB		 665 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
666 if (result)
667 goto fail;
72c973dd 668 result = usb_ep_enable(ep);
a400cadc
DB		 669 if (result < 0)
670 goto fail;
671 ep->driver_data = ss;
672
b4036ccd 673 result = source_sink_start_ep(ss, false, false, speed);
a400cadc 674 if (result < 0) {
b4036ccd
PZ		 675fail2:
676 ep = ss->out_ep;
a400cadc
DB		 677 usb_ep_disable(ep);
678 ep->driver_data = NULL;
679 goto fail;
680 }
681
b4036ccd
PZ		 682 if (alt == 0)
683 goto out;
684
685 /* one iso endpoint writes (sources) zeroes IN (to the host) */
686 ep = ss->iso_in_ep;
687 if (ep) {
688 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
689 if (result)
690 goto fail2;
691 result = usb_ep_enable(ep);
692 if (result < 0)
693 goto fail2;
694 ep->driver_data = ss;
695
696 result = source_sink_start_ep(ss, true, true, speed);
697 if (result < 0) {
698fail3:
699 ep = ss->iso_in_ep;
700 if (ep) {
701 usb_ep_disable(ep);
702 ep->driver_data = NULL;
703 }
704 goto fail2;
705 }
706 }
707
708 /* one iso endpoint reads (sinks) anything OUT (from the host) */
709 ep = ss->iso_out_ep;
710 if (ep) {
711 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
712 if (result)
713 goto fail3;
714 result = usb_ep_enable(ep);
715 if (result < 0)
716 goto fail3;
717 ep->driver_data = ss;
718
719 result = source_sink_start_ep(ss, false, true, speed);
720 if (result < 0) {
721 usb_ep_disable(ep);
722 ep->driver_data = NULL;
723 goto fail3;
724 }
725 }
726out:
727 ss->cur_alt = alt;
728
729 DBG(cdev, "%s enabled, alt intf %d\n", ss->function.name, alt);
a400cadc
DB		 730 return result;
731}
732
733static int sourcesink_set_alt(struct usb_function *f,
734 unsigned intf, unsigned alt)
735{
b4036ccd
PZ		 736 struct f_sourcesink *ss = func_to_ss(f);
737 struct usb_composite_dev *cdev = f->config->cdev;
a400cadc 738
a400cadc
DB		 739 if (ss->in_ep->driver_data)
740 disable_source_sink(ss);
b4036ccd
PZ		 741 return enable_source_sink(cdev, ss, alt);
742}
743
744static int sourcesink_get_alt(struct usb_function *f, unsigned intf)
745{
746 struct f_sourcesink *ss = func_to_ss(f);
747
748 return ss->cur_alt;
a400cadc
DB		 749}
750
751static void sourcesink_disable(struct usb_function *f)
752{
753 struct f_sourcesink *ss = func_to_ss(f);
754
755 disable_source_sink(ss);
756}
757
a400cadc
DB		 758/*-------------------------------------------------------------------------*/
759
e12995ec 760static int __init sourcesink_bind_config(struct usb_configuration *c)
a400cadc
DB		 761{
762 struct f_sourcesink *ss;
763 int status;
764
765 ss = kzalloc(sizeof *ss, GFP_KERNEL);
766 if (!ss)
767 return -ENOMEM;
768
769 ss->function.name = "source/sink";
a400cadc
DB		 770 ss->function.bind = sourcesink_bind;
771 ss->function.unbind = sourcesink_unbind;
772 ss->function.set_alt = sourcesink_set_alt;
b4036ccd 773 ss->function.get_alt = sourcesink_get_alt;
a400cadc 774 ss->function.disable = sourcesink_disable;
a400cadc
DB		 775
776 status = usb_add_function(c, &ss->function);
777 if (status)
778 kfree(ss);
779 return status;
780}
781
782static int sourcesink_setup(struct usb_configuration *c,
783 const struct usb_ctrlrequest *ctrl)
784{
785 struct usb_request *req = c->cdev->req;
786 int value = -EOPNOTSUPP;
787 u16 w_index = le16_to_cpu(ctrl->wIndex);
788 u16 w_value = le16_to_cpu(ctrl->wValue);
789 u16 w_length = le16_to_cpu(ctrl->wLength);
790
e13f17ff 791 req->length = USB_COMP_EP0_BUFSIZ;
5030ec73 792
a400cadc
DB		 793 /* composite driver infrastructure handles everything except
794 * the two control test requests.
795 */
796 switch (ctrl->bRequest) {
797
798 /*
799 * These are the same vendor-specific requests supported by
800 * Intel's USB 2.0 compliance test devices. We exceed that
801 * device spec by allowing multiple-packet requests.
802 *
803 * NOTE: the Control-OUT data stays in req->buf ... better
804 * would be copying it into a scratch buffer, so that other
805 * requests may safely intervene.
806 */
807 case 0x5b: /* control WRITE test -- fill the buffer */
808 if (ctrl->bRequestType != (USB_DIR_OUT|USB_TYPE_VENDOR))
809 goto unknown;
810 if (w_value || w_index)
811 break;
812 /* just read that many bytes into the buffer */
813 if (w_length > req->length)
814 break;
815 value = w_length;
816 break;
817 case 0x5c: /* control READ test -- return the buffer */
818 if (ctrl->bRequestType != (USB_DIR_IN|USB_TYPE_VENDOR))
819 goto unknown;
820 if (w_value || w_index)
821 break;
822 /* expect those bytes are still in the buffer; send back */
823 if (w_length > req->length)
824 break;
825 value = w_length;
826 break;
827
828 default:
829unknown:
830 VDBG(c->cdev,
831 "unknown control req%02x.%02x v%04x i%04x l%d\n",
832 ctrl->bRequestType, ctrl->bRequest,
833 w_value, w_index, w_length);
834 }
835
836 /* respond with data transfer or status phase? */
837 if (value >= 0) {
838 VDBG(c->cdev, "source/sink req%02x.%02x v%04x i%04x l%d\n",
839 ctrl->bRequestType, ctrl->bRequest,
840 w_value, w_index, w_length);
841 req->zero = 0;
842 req->length = value;
843 value = usb_ep_queue(c->cdev->gadget->ep0, req, GFP_ATOMIC);
844 if (value < 0)
b4036ccd 845 ERROR(c->cdev, "source/sink response, err %d\n",
a400cadc
DB		 846 value);
847 }
848
849 /* device either stalls (value < 0) or reports success */
850 return value;
851}
852
853static struct usb_configuration sourcesink_driver = {
b4036ccd
PZ		 854 .label = "source/sink",
855 .strings = sourcesink_strings,
856 .setup = sourcesink_setup,
857 .bConfigurationValue = 3,
858 .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
859 /* .iConfiguration = DYNAMIC */
a400cadc
DB		 860};
861
862/**
863 * sourcesink_add - add a source/sink testing configuration to a device
864 * @cdev: the device to support the configuration
865 */
ab943a2e 866int __init sourcesink_add(struct usb_composite_dev *cdev, bool autoresume)
a400cadc
DB		 867{
868 int id;
869
870 /* allocate string ID(s) */
871 id = usb_string_id(cdev);
872 if (id < 0)
873 return id;
874 strings_sourcesink[0].id = id;
875
b4036ccd
PZ		 876 source_sink_intf_alt0.iInterface = id;
877 source_sink_intf_alt1.iInterface = id;
a400cadc
DB		 878 sourcesink_driver.iConfiguration = id;
879
880 /* support autoresume for remote wakeup testing */
881 if (autoresume)
882 sourcesink_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
883
884 /* support OTG systems */
885 if (gadget_is_otg(cdev->gadget)) {
886 sourcesink_driver.descriptors = otg_desc;
887 sourcesink_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
888 }
889
c9bfff9c 890 return usb_add_config(cdev, &sourcesink_driver, sourcesink_bind_config);
a400cadc 891}
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