2 * f_sourcesink.c - USB peripheral source/sink configuration driver
4 * Copyright (C) 2003-2008 David Brownell
5 * Copyright (C) 2008 by Nokia Corporation
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.
13 /* #define VERBOSE_DEBUG */
15 #include <linux/slab.h>
16 #include <linux/kernel.h>
17 #include <linux/device.h>
18 #include <linux/module.h>
21 #include "gadget_chips.h"
25 * SOURCE/SINK FUNCTION ... a primary testing vehicle for USB peripheral
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.
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.
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.
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.
50 struct usb_function function;
53 struct usb_ep *out_ep;
54 struct usb_ep *iso_in_ep;
55 struct usb_ep *iso_out_ep;
59 static inline struct f_sourcesink *func_to_ss(struct usb_function *f)
61 return container_of(f, struct f_sourcesink, function);
64 static unsigned pattern;
65 module_param(pattern, uint, S_IRUGO|S_IWUSR);
66 MODULE_PARM_DESC(pattern, "0 = all zeroes, 1 = mod63, 2 = none");
68 static unsigned isoc_interval = 4;
69 module_param(isoc_interval, uint, S_IRUGO|S_IWUSR);
70 MODULE_PARM_DESC(isoc_interval, "1 - 16");
72 static unsigned isoc_maxpacket = 1024;
73 module_param(isoc_maxpacket, uint, S_IRUGO|S_IWUSR);
74 MODULE_PARM_DESC(isoc_maxpacket, "0 - 1023 (fs), 0 - 1024 (hs/ss)");
76 static unsigned isoc_mult;
77 module_param(isoc_mult, uint, S_IRUGO|S_IWUSR);
78 MODULE_PARM_DESC(isoc_mult, "0 - 2 (hs/ss only)");
80 static unsigned isoc_maxburst;
81 module_param(isoc_maxburst, uint, S_IRUGO|S_IWUSR);
82 MODULE_PARM_DESC(isoc_maxburst, "0 - 15 (ss only)");
84 /*-------------------------------------------------------------------------*/
86 static struct usb_interface_descriptor source_sink_intf_alt0 = {
87 .bLength = USB_DT_INTERFACE_SIZE,
88 .bDescriptorType = USB_DT_INTERFACE,
90 .bAlternateSetting = 0,
92 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
93 /* .iInterface = DYNAMIC */
96 static struct usb_interface_descriptor source_sink_intf_alt1 = {
97 .bLength = USB_DT_INTERFACE_SIZE,
98 .bDescriptorType = USB_DT_INTERFACE,
100 .bAlternateSetting = 1,
102 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
103 /* .iInterface = DYNAMIC */
106 /* full speed support: */
108 static struct usb_endpoint_descriptor fs_source_desc = {
109 .bLength = USB_DT_ENDPOINT_SIZE,
110 .bDescriptorType = USB_DT_ENDPOINT,
112 .bEndpointAddress = USB_DIR_IN,
113 .bmAttributes = USB_ENDPOINT_XFER_BULK,
116 static struct usb_endpoint_descriptor fs_sink_desc = {
117 .bLength = USB_DT_ENDPOINT_SIZE,
118 .bDescriptorType = USB_DT_ENDPOINT,
120 .bEndpointAddress = USB_DIR_OUT,
121 .bmAttributes = USB_ENDPOINT_XFER_BULK,
124 static struct usb_endpoint_descriptor fs_iso_source_desc = {
125 .bLength = USB_DT_ENDPOINT_SIZE,
126 .bDescriptorType = USB_DT_ENDPOINT,
128 .bEndpointAddress = USB_DIR_IN,
129 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
130 .wMaxPacketSize = cpu_to_le16(1023),
134 static struct usb_endpoint_descriptor fs_iso_sink_desc = {
135 .bLength = USB_DT_ENDPOINT_SIZE,
136 .bDescriptorType = USB_DT_ENDPOINT,
138 .bEndpointAddress = USB_DIR_OUT,
139 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
140 .wMaxPacketSize = cpu_to_le16(1023),
144 static struct usb_descriptor_header *fs_source_sink_descs[] = {
145 (struct usb_descriptor_header *) &source_sink_intf_alt0,
146 (struct usb_descriptor_header *) &fs_sink_desc,
147 (struct usb_descriptor_header *) &fs_source_desc,
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,
157 /* high speed support: */
159 static struct usb_endpoint_descriptor hs_source_desc = {
160 .bLength = USB_DT_ENDPOINT_SIZE,
161 .bDescriptorType = USB_DT_ENDPOINT,
163 .bmAttributes = USB_ENDPOINT_XFER_BULK,
164 .wMaxPacketSize = cpu_to_le16(512),
167 static struct usb_endpoint_descriptor hs_sink_desc = {
168 .bLength = USB_DT_ENDPOINT_SIZE,
169 .bDescriptorType = USB_DT_ENDPOINT,
171 .bmAttributes = USB_ENDPOINT_XFER_BULK,
172 .wMaxPacketSize = cpu_to_le16(512),
175 static struct usb_endpoint_descriptor hs_iso_source_desc = {
176 .bLength = USB_DT_ENDPOINT_SIZE,
177 .bDescriptorType = USB_DT_ENDPOINT,
179 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
180 .wMaxPacketSize = cpu_to_le16(1024),
184 static struct usb_endpoint_descriptor hs_iso_sink_desc = {
185 .bLength = USB_DT_ENDPOINT_SIZE,
186 .bDescriptorType = USB_DT_ENDPOINT,
188 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
189 .wMaxPacketSize = cpu_to_le16(1024),
193 static struct usb_descriptor_header *hs_source_sink_descs[] = {
194 (struct usb_descriptor_header *) &source_sink_intf_alt0,
195 (struct usb_descriptor_header *) &hs_source_desc,
196 (struct usb_descriptor_header *) &hs_sink_desc,
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,
206 /* super speed support: */
208 static struct usb_endpoint_descriptor ss_source_desc = {
209 .bLength = USB_DT_ENDPOINT_SIZE,
210 .bDescriptorType = USB_DT_ENDPOINT,
212 .bmAttributes = USB_ENDPOINT_XFER_BULK,
213 .wMaxPacketSize = cpu_to_le16(1024),
216 struct usb_ss_ep_comp_descriptor ss_source_comp_desc = {
217 .bLength = USB_DT_SS_EP_COMP_SIZE,
218 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
222 .wBytesPerInterval = 0,
225 static struct usb_endpoint_descriptor ss_sink_desc = {
226 .bLength = USB_DT_ENDPOINT_SIZE,
227 .bDescriptorType = USB_DT_ENDPOINT,
229 .bmAttributes = USB_ENDPOINT_XFER_BULK,
230 .wMaxPacketSize = cpu_to_le16(1024),
233 struct usb_ss_ep_comp_descriptor ss_sink_comp_desc = {
234 .bLength = USB_DT_SS_EP_COMP_SIZE,
235 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
239 .wBytesPerInterval = 0,
242 static struct usb_endpoint_descriptor ss_iso_source_desc = {
243 .bLength = USB_DT_ENDPOINT_SIZE,
244 .bDescriptorType = USB_DT_ENDPOINT,
246 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
247 .wMaxPacketSize = cpu_to_le16(1024),
251 struct 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,
257 .wBytesPerInterval = cpu_to_le16(1024),
260 static struct usb_endpoint_descriptor ss_iso_sink_desc = {
261 .bLength = USB_DT_ENDPOINT_SIZE,
262 .bDescriptorType = USB_DT_ENDPOINT,
264 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
265 .wMaxPacketSize = cpu_to_le16(1024),
269 struct 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,
275 .wBytesPerInterval = cpu_to_le16(1024),
278 static struct usb_descriptor_header *ss_source_sink_descs[] = {
279 (struct usb_descriptor_header *) &source_sink_intf_alt0,
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,
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,
297 /* function-specific strings: */
299 static struct usb_string strings_sourcesink[] = {
300 [0].s = "source and sink data",
301 { } /* end of list */
304 static struct usb_gadget_strings stringtab_sourcesink = {
305 .language = 0x0409, /* en-us */
306 .strings = strings_sourcesink,
309 static struct usb_gadget_strings *sourcesink_strings[] = {
310 &stringtab_sourcesink,
314 /*-------------------------------------------------------------------------*/
317 sourcesink_bind(struct usb_configuration *c, struct usb_function *f)
319 struct usb_composite_dev *cdev = c->cdev;
320 struct f_sourcesink *ss = func_to_ss(f);
324 /* allocate interface ID(s) */
325 id = usb_interface_id(c, f);
328 source_sink_intf_alt0.bInterfaceNumber = id;
329 source_sink_intf_alt1.bInterfaceNumber = id;
331 /* allocate bulk endpoints */
332 ss->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc);
335 ERROR(cdev, "%s: can't autoconfigure on %s\n",
336 f->name, cdev->gadget->name);
339 ss->in_ep->driver_data = cdev; /* claim */
341 ss->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_sink_desc);
344 ss->out_ep->driver_data = cdev; /* claim */
346 /* sanity check the isoc module parameters */
347 if (isoc_interval < 1)
349 if (isoc_interval > 16)
353 if (isoc_maxburst > 15)
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;
364 /* allocate iso endpoints */
365 ss->iso_in_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_source_desc);
368 ss->iso_in_ep->driver_data = cdev; /* claim */
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 */
374 ss->iso_in_ep->driver_data = NULL;
375 ss->iso_in_ep = NULL;
378 * We still want to work even if the UDC doesn't have isoc
379 * endpoints, so null out the alt interface that contains
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;
387 if (isoc_maxpacket > 1024)
388 isoc_maxpacket = 1024;
390 /* support high speed hardware */
391 hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
392 hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
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.
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;
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;
410 /* support super speed hardware */
411 ss_source_desc.bEndpointAddress =
412 fs_source_desc.bEndpointAddress;
413 ss_sink_desc.bEndpointAddress =
414 fs_sink_desc.bEndpointAddress;
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.
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;
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;
438 ret = usb_assign_descriptors(f, fs_source_sink_descs,
439 hs_source_sink_descs, ss_source_sink_descs);
443 DBG(cdev, "%s speed %s: IN/%s, OUT/%s, ISO-IN/%s, ISO-OUT/%s\n",
444 (gadget_is_superspeed(c->cdev->gadget) ? "super" :
445 (gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full")),
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>");
453 sourcesink_unbind(struct usb_configuration *c, struct usb_function *f)
455 usb_free_all_descriptors(f);
456 kfree(func_to_ss(f));
459 /* optionally require specific source/sink data patterns */
460 static int check_read_data(struct f_sourcesink *ss, struct usb_request *req)
464 struct usb_composite_dev *cdev = ss->function.config->cdev;
469 for (i = 0; i < req->actual; i++, buf++) {
472 /* all-zeroes has no synchronization issues */
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
483 * stutter for any reason, including buffer duplication...)
486 if (*buf == (u8)(i % 63))
490 ERROR(cdev, "bad OUT byte, buf[%d] = %d\n", i, *buf);
491 usb_ep_set_halt(ss->out_ep);
497 static void reinit_write_data(struct usb_ep *ep, struct usb_request *req)
504 memset(req->buf, 0, req->length);
507 for (i = 0; i < req->length; i++)
508 *buf++ = (u8) (i % 63);
515 static void source_sink_complete(struct usb_ep *ep, struct usb_request *req)
517 struct usb_composite_dev *cdev;
518 struct f_sourcesink *ss = ep->driver_data;
519 int status = req->status;
521 /* driver_data will be null if ep has been disabled */
525 cdev = ss->function.config->cdev;
529 case 0: /* normal completion? */
530 if (ep == ss->out_ep) {
531 check_read_data(ss, req);
533 memset(req->buf, 0x55, req->length);
535 reinit_write_data(ep, req);
538 /* this endpoint is normally active while we're configured */
539 case -ECONNABORTED: /* hardware forced ep reset */
540 case -ECONNRESET: /* request dequeued */
541 case -ESHUTDOWN: /* disconnect from host */
542 VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status,
543 req->actual, req->length);
544 if (ep == ss->out_ep)
545 check_read_data(ss, req);
546 free_ep_req(ep, req);
549 case -EOVERFLOW: /* buffer overrun on read means that
550 * we didn't provide a big enough
555 DBG(cdev, "%s complete --> %d, %d/%d\n", ep->name,
556 status, req->actual, req->length);
558 case -EREMOTEIO: /* short read */
562 status = usb_ep_queue(ep, req, GFP_ATOMIC);
564 ERROR(cdev, "kill %s: resubmit %d bytes --> %d\n",
565 ep->name, req->length, status);
567 /* FIXME recover later ... somehow */
571 static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in,
572 bool is_iso, int speed)
575 struct usb_request *req;
578 for (i = 0; i < 8; i++) {
581 case USB_SPEED_SUPER:
582 size = isoc_maxpacket * (isoc_mult + 1) *
586 size = isoc_maxpacket * (isoc_mult + 1);
589 size = isoc_maxpacket > 1023 ?
590 1023 : isoc_maxpacket;
593 ep = is_in ? ss->iso_in_ep : ss->iso_out_ep;
594 req = alloc_ep_req(ep, size);
596 ep = is_in ? ss->in_ep : ss->out_ep;
597 req = alloc_ep_req(ep, 0);
603 req->complete = source_sink_complete;
605 reinit_write_data(ep, req);
606 else if (pattern != 2)
607 memset(req->buf, 0x55, req->length);
609 status = usb_ep_queue(ep, req, GFP_ATOMIC);
611 struct usb_composite_dev *cdev;
613 cdev = ss->function.config->cdev;
614 ERROR(cdev, "start %s%s %s --> %d\n",
615 is_iso ? "ISO-" : "", is_in ? "IN" : "OUT",
617 free_ep_req(ep, req);
627 static void disable_source_sink(struct f_sourcesink *ss)
629 struct usb_composite_dev *cdev;
631 cdev = ss->function.config->cdev;
632 disable_endpoints(cdev, ss->in_ep, ss->out_ep, ss->iso_in_ep,
634 VDBG(cdev, "%s disabled\n", ss->function.name);
638 enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss,
642 int speed = cdev->gadget->speed;
645 /* one bulk endpoint writes (sources) zeroes IN (to the host) */
647 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
650 result = usb_ep_enable(ep);
653 ep->driver_data = ss;
655 result = source_sink_start_ep(ss, true, false, speed);
660 ep->driver_data = NULL;
664 /* one bulk endpoint reads (sinks) anything OUT (from the host) */
666 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
669 result = usb_ep_enable(ep);
672 ep->driver_data = ss;
674 result = source_sink_start_ep(ss, false, false, speed);
679 ep->driver_data = NULL;
686 /* one iso endpoint writes (sources) zeroes IN (to the host) */
689 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
692 result = usb_ep_enable(ep);
695 ep->driver_data = ss;
697 result = source_sink_start_ep(ss, true, true, speed);
703 ep->driver_data = NULL;
709 /* one iso endpoint reads (sinks) anything OUT (from the host) */
712 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
715 result = usb_ep_enable(ep);
718 ep->driver_data = ss;
720 result = source_sink_start_ep(ss, false, true, speed);
723 ep->driver_data = NULL;
730 DBG(cdev, "%s enabled, alt intf %d\n", ss->function.name, alt);
734 static int sourcesink_set_alt(struct usb_function *f,
735 unsigned intf, unsigned alt)
737 struct f_sourcesink *ss = func_to_ss(f);
738 struct usb_composite_dev *cdev = f->config->cdev;
740 if (ss->in_ep->driver_data)
741 disable_source_sink(ss);
742 return enable_source_sink(cdev, ss, alt);
745 static int sourcesink_get_alt(struct usb_function *f, unsigned intf)
747 struct f_sourcesink *ss = func_to_ss(f);
752 static void sourcesink_disable(struct usb_function *f)
754 struct f_sourcesink *ss = func_to_ss(f);
756 disable_source_sink(ss);
759 /*-------------------------------------------------------------------------*/
761 static int __init sourcesink_bind_config(struct usb_configuration *c)
763 struct f_sourcesink *ss;
766 ss = kzalloc(sizeof *ss, GFP_KERNEL);
770 ss->function.name = "source/sink";
771 ss->function.bind = sourcesink_bind;
772 ss->function.unbind = sourcesink_unbind;
773 ss->function.set_alt = sourcesink_set_alt;
774 ss->function.get_alt = sourcesink_get_alt;
775 ss->function.disable = sourcesink_disable;
777 status = usb_add_function(c, &ss->function);
783 static int sourcesink_setup(struct usb_configuration *c,
784 const struct usb_ctrlrequest *ctrl)
786 struct usb_request *req = c->cdev->req;
787 int value = -EOPNOTSUPP;
788 u16 w_index = le16_to_cpu(ctrl->wIndex);
789 u16 w_value = le16_to_cpu(ctrl->wValue);
790 u16 w_length = le16_to_cpu(ctrl->wLength);
792 req->length = USB_COMP_EP0_BUFSIZ;
794 /* composite driver infrastructure handles everything except
795 * the two control test requests.
797 switch (ctrl->bRequest) {
800 * These are the same vendor-specific requests supported by
801 * Intel's USB 2.0 compliance test devices. We exceed that
802 * device spec by allowing multiple-packet requests.
804 * NOTE: the Control-OUT data stays in req->buf ... better
805 * would be copying it into a scratch buffer, so that other
806 * requests may safely intervene.
808 case 0x5b: /* control WRITE test -- fill the buffer */
809 if (ctrl->bRequestType != (USB_DIR_OUT|USB_TYPE_VENDOR))
811 if (w_value || w_index)
813 /* just read that many bytes into the buffer */
814 if (w_length > req->length)
818 case 0x5c: /* control READ test -- return the buffer */
819 if (ctrl->bRequestType != (USB_DIR_IN|USB_TYPE_VENDOR))
821 if (w_value || w_index)
823 /* expect those bytes are still in the buffer; send back */
824 if (w_length > req->length)
832 "unknown control req%02x.%02x v%04x i%04x l%d\n",
833 ctrl->bRequestType, ctrl->bRequest,
834 w_value, w_index, w_length);
837 /* respond with data transfer or status phase? */
839 VDBG(c->cdev, "source/sink req%02x.%02x v%04x i%04x l%d\n",
840 ctrl->bRequestType, ctrl->bRequest,
841 w_value, w_index, w_length);
844 value = usb_ep_queue(c->cdev->gadget->ep0, req, GFP_ATOMIC);
846 ERROR(c->cdev, "source/sink response, err %d\n",
850 /* device either stalls (value < 0) or reports success */
854 static struct usb_configuration sourcesink_driver = {
855 .label = "source/sink",
856 .strings = sourcesink_strings,
857 .setup = sourcesink_setup,
858 .bConfigurationValue = 3,
859 .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
860 /* .iConfiguration = DYNAMIC */
864 * sourcesink_add - add a source/sink testing configuration to a device
865 * @cdev: the device to support the configuration
867 int __init sourcesink_add(struct usb_composite_dev *cdev, bool autoresume)
871 /* allocate string ID(s) */
872 id = usb_string_id(cdev);
875 strings_sourcesink[0].id = id;
877 source_sink_intf_alt0.iInterface = id;
878 source_sink_intf_alt1.iInterface = id;
879 sourcesink_driver.iConfiguration = id;
881 /* support autoresume for remote wakeup testing */
883 sourcesink_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
885 /* support OTG systems */
886 if (gadget_is_otg(cdev->gadget)) {
887 sourcesink_driver.descriptors = otg_desc;
888 sourcesink_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
891 return usb_add_config(cdev, &sourcesink_driver, sourcesink_bind_config);