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>
19 #include <linux/usb/composite.h>
20 #include <linux/err.h>
26 * SOURCE/SINK FUNCTION ... a primary testing vehicle for USB peripheral
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.
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.
38 * Note that because this doesn't queue more than one request at a time,
39 * some other function must be used to test queueing logic. The network
40 * link (g_ether) is the best overall option for that, since its TX and RX
41 * queues are relatively independent, will receive a range of packet sizes,
42 * and can often be made to run out completely. Those issues are important
43 * when stress testing peripheral controller drivers.
46 struct usb_function function;
49 struct usb_ep *out_ep;
50 struct usb_ep *iso_in_ep;
51 struct usb_ep *iso_out_ep;
55 unsigned isoc_interval;
56 unsigned isoc_maxpacket;
58 unsigned isoc_maxburst;
62 static inline struct f_sourcesink *func_to_ss(struct usb_function *f)
64 return container_of(f, struct f_sourcesink, function);
67 /*-------------------------------------------------------------------------*/
69 static struct usb_interface_descriptor source_sink_intf_alt0 = {
70 .bLength = USB_DT_INTERFACE_SIZE,
71 .bDescriptorType = USB_DT_INTERFACE,
73 .bAlternateSetting = 0,
75 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
76 /* .iInterface = DYNAMIC */
79 static struct usb_interface_descriptor source_sink_intf_alt1 = {
80 .bLength = USB_DT_INTERFACE_SIZE,
81 .bDescriptorType = USB_DT_INTERFACE,
83 .bAlternateSetting = 1,
85 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
86 /* .iInterface = DYNAMIC */
89 /* full speed support: */
91 static struct usb_endpoint_descriptor fs_source_desc = {
92 .bLength = USB_DT_ENDPOINT_SIZE,
93 .bDescriptorType = USB_DT_ENDPOINT,
95 .bEndpointAddress = USB_DIR_IN,
96 .bmAttributes = USB_ENDPOINT_XFER_BULK,
99 static struct usb_endpoint_descriptor fs_sink_desc = {
100 .bLength = USB_DT_ENDPOINT_SIZE,
101 .bDescriptorType = USB_DT_ENDPOINT,
103 .bEndpointAddress = USB_DIR_OUT,
104 .bmAttributes = USB_ENDPOINT_XFER_BULK,
107 static struct usb_endpoint_descriptor fs_iso_source_desc = {
108 .bLength = USB_DT_ENDPOINT_SIZE,
109 .bDescriptorType = USB_DT_ENDPOINT,
111 .bEndpointAddress = USB_DIR_IN,
112 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
113 .wMaxPacketSize = cpu_to_le16(1023),
117 static struct usb_endpoint_descriptor fs_iso_sink_desc = {
118 .bLength = USB_DT_ENDPOINT_SIZE,
119 .bDescriptorType = USB_DT_ENDPOINT,
121 .bEndpointAddress = USB_DIR_OUT,
122 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
123 .wMaxPacketSize = cpu_to_le16(1023),
127 static struct usb_descriptor_header *fs_source_sink_descs[] = {
128 (struct usb_descriptor_header *) &source_sink_intf_alt0,
129 (struct usb_descriptor_header *) &fs_sink_desc,
130 (struct usb_descriptor_header *) &fs_source_desc,
131 (struct usb_descriptor_header *) &source_sink_intf_alt1,
132 #define FS_ALT_IFC_1_OFFSET 3
133 (struct usb_descriptor_header *) &fs_sink_desc,
134 (struct usb_descriptor_header *) &fs_source_desc,
135 (struct usb_descriptor_header *) &fs_iso_sink_desc,
136 (struct usb_descriptor_header *) &fs_iso_source_desc,
140 /* high speed support: */
142 static struct usb_endpoint_descriptor hs_source_desc = {
143 .bLength = USB_DT_ENDPOINT_SIZE,
144 .bDescriptorType = USB_DT_ENDPOINT,
146 .bmAttributes = USB_ENDPOINT_XFER_BULK,
147 .wMaxPacketSize = cpu_to_le16(512),
150 static struct usb_endpoint_descriptor hs_sink_desc = {
151 .bLength = USB_DT_ENDPOINT_SIZE,
152 .bDescriptorType = USB_DT_ENDPOINT,
154 .bmAttributes = USB_ENDPOINT_XFER_BULK,
155 .wMaxPacketSize = cpu_to_le16(512),
158 static struct usb_endpoint_descriptor hs_iso_source_desc = {
159 .bLength = USB_DT_ENDPOINT_SIZE,
160 .bDescriptorType = USB_DT_ENDPOINT,
162 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
163 .wMaxPacketSize = cpu_to_le16(1024),
167 static struct usb_endpoint_descriptor hs_iso_sink_desc = {
168 .bLength = USB_DT_ENDPOINT_SIZE,
169 .bDescriptorType = USB_DT_ENDPOINT,
171 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
172 .wMaxPacketSize = cpu_to_le16(1024),
176 static struct usb_descriptor_header *hs_source_sink_descs[] = {
177 (struct usb_descriptor_header *) &source_sink_intf_alt0,
178 (struct usb_descriptor_header *) &hs_source_desc,
179 (struct usb_descriptor_header *) &hs_sink_desc,
180 (struct usb_descriptor_header *) &source_sink_intf_alt1,
181 #define HS_ALT_IFC_1_OFFSET 3
182 (struct usb_descriptor_header *) &hs_source_desc,
183 (struct usb_descriptor_header *) &hs_sink_desc,
184 (struct usb_descriptor_header *) &hs_iso_source_desc,
185 (struct usb_descriptor_header *) &hs_iso_sink_desc,
189 /* super speed support: */
191 static struct usb_endpoint_descriptor ss_source_desc = {
192 .bLength = USB_DT_ENDPOINT_SIZE,
193 .bDescriptorType = USB_DT_ENDPOINT,
195 .bmAttributes = USB_ENDPOINT_XFER_BULK,
196 .wMaxPacketSize = cpu_to_le16(1024),
199 static struct usb_ss_ep_comp_descriptor ss_source_comp_desc = {
200 .bLength = USB_DT_SS_EP_COMP_SIZE,
201 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
205 .wBytesPerInterval = 0,
208 static struct usb_endpoint_descriptor ss_sink_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 static struct usb_ss_ep_comp_descriptor ss_sink_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_iso_source_desc = {
226 .bLength = USB_DT_ENDPOINT_SIZE,
227 .bDescriptorType = USB_DT_ENDPOINT,
229 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
230 .wMaxPacketSize = cpu_to_le16(1024),
234 static struct usb_ss_ep_comp_descriptor ss_iso_source_comp_desc = {
235 .bLength = USB_DT_SS_EP_COMP_SIZE,
236 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
240 .wBytesPerInterval = cpu_to_le16(1024),
243 static struct usb_endpoint_descriptor ss_iso_sink_desc = {
244 .bLength = USB_DT_ENDPOINT_SIZE,
245 .bDescriptorType = USB_DT_ENDPOINT,
247 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
248 .wMaxPacketSize = cpu_to_le16(1024),
252 static struct usb_ss_ep_comp_descriptor ss_iso_sink_comp_desc = {
253 .bLength = USB_DT_SS_EP_COMP_SIZE,
254 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
258 .wBytesPerInterval = cpu_to_le16(1024),
261 static struct usb_descriptor_header *ss_source_sink_descs[] = {
262 (struct usb_descriptor_header *) &source_sink_intf_alt0,
263 (struct usb_descriptor_header *) &ss_source_desc,
264 (struct usb_descriptor_header *) &ss_source_comp_desc,
265 (struct usb_descriptor_header *) &ss_sink_desc,
266 (struct usb_descriptor_header *) &ss_sink_comp_desc,
267 (struct usb_descriptor_header *) &source_sink_intf_alt1,
268 #define SS_ALT_IFC_1_OFFSET 5
269 (struct usb_descriptor_header *) &ss_source_desc,
270 (struct usb_descriptor_header *) &ss_source_comp_desc,
271 (struct usb_descriptor_header *) &ss_sink_desc,
272 (struct usb_descriptor_header *) &ss_sink_comp_desc,
273 (struct usb_descriptor_header *) &ss_iso_source_desc,
274 (struct usb_descriptor_header *) &ss_iso_source_comp_desc,
275 (struct usb_descriptor_header *) &ss_iso_sink_desc,
276 (struct usb_descriptor_header *) &ss_iso_sink_comp_desc,
280 /* function-specific strings: */
282 static struct usb_string strings_sourcesink[] = {
283 [0].s = "source and sink data",
284 { } /* end of list */
287 static struct usb_gadget_strings stringtab_sourcesink = {
288 .language = 0x0409, /* en-us */
289 .strings = strings_sourcesink,
292 static struct usb_gadget_strings *sourcesink_strings[] = {
293 &stringtab_sourcesink,
297 /*-------------------------------------------------------------------------*/
299 static inline struct usb_request *ss_alloc_ep_req(struct usb_ep *ep, int len)
301 struct f_sourcesink *ss = ep->driver_data;
303 return alloc_ep_req(ep, len, ss->buflen);
306 void free_ep_req(struct usb_ep *ep, struct usb_request *req)
309 usb_ep_free_request(ep, req);
312 static void disable_ep(struct usb_composite_dev *cdev, struct usb_ep *ep)
316 value = usb_ep_disable(ep);
318 DBG(cdev, "disable %s --> %d\n", ep->name, value);
321 void disable_endpoints(struct usb_composite_dev *cdev,
322 struct usb_ep *in, struct usb_ep *out,
323 struct usb_ep *iso_in, struct usb_ep *iso_out)
325 disable_ep(cdev, in);
326 disable_ep(cdev, out);
328 disable_ep(cdev, iso_in);
330 disable_ep(cdev, iso_out);
334 sourcesink_bind(struct usb_configuration *c, struct usb_function *f)
336 struct usb_composite_dev *cdev = c->cdev;
337 struct f_sourcesink *ss = func_to_ss(f);
341 /* allocate interface ID(s) */
342 id = usb_interface_id(c, f);
345 source_sink_intf_alt0.bInterfaceNumber = id;
346 source_sink_intf_alt1.bInterfaceNumber = id;
348 /* allocate bulk endpoints */
349 ss->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc);
352 ERROR(cdev, "%s: can't autoconfigure on %s\n",
353 f->name, cdev->gadget->name);
357 ss->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_sink_desc);
361 /* sanity check the isoc module parameters */
362 if (ss->isoc_interval < 1)
363 ss->isoc_interval = 1;
364 if (ss->isoc_interval > 16)
365 ss->isoc_interval = 16;
366 if (ss->isoc_mult > 2)
368 if (ss->isoc_maxburst > 15)
369 ss->isoc_maxburst = 15;
371 /* fill in the FS isoc descriptors from the module parameters */
372 fs_iso_source_desc.wMaxPacketSize = ss->isoc_maxpacket > 1023 ?
373 1023 : ss->isoc_maxpacket;
374 fs_iso_source_desc.bInterval = ss->isoc_interval;
375 fs_iso_sink_desc.wMaxPacketSize = ss->isoc_maxpacket > 1023 ?
376 1023 : ss->isoc_maxpacket;
377 fs_iso_sink_desc.bInterval = ss->isoc_interval;
379 /* allocate iso endpoints */
380 ss->iso_in_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_source_desc);
384 ss->iso_out_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_sink_desc);
385 if (!ss->iso_out_ep) {
386 usb_ep_autoconfig_release(ss->iso_in_ep);
387 ss->iso_in_ep = NULL;
390 * We still want to work even if the UDC doesn't have isoc
391 * endpoints, so null out the alt interface that contains
394 fs_source_sink_descs[FS_ALT_IFC_1_OFFSET] = NULL;
395 hs_source_sink_descs[HS_ALT_IFC_1_OFFSET] = NULL;
396 ss_source_sink_descs[SS_ALT_IFC_1_OFFSET] = NULL;
399 if (ss->isoc_maxpacket > 1024)
400 ss->isoc_maxpacket = 1024;
402 /* support high speed hardware */
403 hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
404 hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
407 * Fill in the HS isoc descriptors from the module parameters.
408 * We assume that the user knows what they are doing and won't
409 * give parameters that their UDC doesn't support.
411 hs_iso_source_desc.wMaxPacketSize = ss->isoc_maxpacket;
412 hs_iso_source_desc.wMaxPacketSize |= ss->isoc_mult << 11;
413 hs_iso_source_desc.bInterval = ss->isoc_interval;
414 hs_iso_source_desc.bEndpointAddress =
415 fs_iso_source_desc.bEndpointAddress;
417 hs_iso_sink_desc.wMaxPacketSize = ss->isoc_maxpacket;
418 hs_iso_sink_desc.wMaxPacketSize |= ss->isoc_mult << 11;
419 hs_iso_sink_desc.bInterval = ss->isoc_interval;
420 hs_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
422 /* support super speed hardware */
423 ss_source_desc.bEndpointAddress =
424 fs_source_desc.bEndpointAddress;
425 ss_sink_desc.bEndpointAddress =
426 fs_sink_desc.bEndpointAddress;
429 * Fill in the SS isoc descriptors from the module parameters.
430 * We assume that the user knows what they are doing and won't
431 * give parameters that their UDC doesn't support.
433 ss_iso_source_desc.wMaxPacketSize = ss->isoc_maxpacket;
434 ss_iso_source_desc.bInterval = ss->isoc_interval;
435 ss_iso_source_comp_desc.bmAttributes = ss->isoc_mult;
436 ss_iso_source_comp_desc.bMaxBurst = ss->isoc_maxburst;
437 ss_iso_source_comp_desc.wBytesPerInterval = ss->isoc_maxpacket *
438 (ss->isoc_mult + 1) * (ss->isoc_maxburst + 1);
439 ss_iso_source_desc.bEndpointAddress =
440 fs_iso_source_desc.bEndpointAddress;
442 ss_iso_sink_desc.wMaxPacketSize = ss->isoc_maxpacket;
443 ss_iso_sink_desc.bInterval = ss->isoc_interval;
444 ss_iso_sink_comp_desc.bmAttributes = ss->isoc_mult;
445 ss_iso_sink_comp_desc.bMaxBurst = ss->isoc_maxburst;
446 ss_iso_sink_comp_desc.wBytesPerInterval = ss->isoc_maxpacket *
447 (ss->isoc_mult + 1) * (ss->isoc_maxburst + 1);
448 ss_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
450 ret = usb_assign_descriptors(f, fs_source_sink_descs,
451 hs_source_sink_descs, ss_source_sink_descs);
455 DBG(cdev, "%s speed %s: IN/%s, OUT/%s, ISO-IN/%s, ISO-OUT/%s\n",
456 (gadget_is_superspeed(c->cdev->gadget) ? "super" :
457 (gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full")),
458 f->name, ss->in_ep->name, ss->out_ep->name,
459 ss->iso_in_ep ? ss->iso_in_ep->name : "<none>",
460 ss->iso_out_ep ? ss->iso_out_ep->name : "<none>");
465 sourcesink_free_func(struct usb_function *f)
467 struct f_ss_opts *opts;
469 opts = container_of(f->fi, struct f_ss_opts, func_inst);
471 mutex_lock(&opts->lock);
473 mutex_unlock(&opts->lock);
475 usb_free_all_descriptors(f);
476 kfree(func_to_ss(f));
479 /* optionally require specific source/sink data patterns */
480 static int check_read_data(struct f_sourcesink *ss, struct usb_request *req)
484 struct usb_composite_dev *cdev = ss->function.config->cdev;
485 int max_packet_size = le16_to_cpu(ss->out_ep->desc->wMaxPacketSize);
487 if (ss->pattern == 2)
490 for (i = 0; i < req->actual; i++, buf++) {
491 switch (ss->pattern) {
493 /* all-zeroes has no synchronization issues */
499 /* "mod63" stays in sync with short-terminated transfers,
500 * OR otherwise when host and gadget agree on how large
501 * each usb transfer request should be. Resync is done
502 * with set_interface or set_config. (We *WANT* it to
503 * get quickly out of sync if controllers or their drivers
504 * stutter for any reason, including buffer duplication...)
507 if (*buf == (u8)((i % max_packet_size) % 63))
511 ERROR(cdev, "bad OUT byte, buf[%d] = %d\n", i, *buf);
512 usb_ep_set_halt(ss->out_ep);
518 static void reinit_write_data(struct usb_ep *ep, struct usb_request *req)
522 int max_packet_size = le16_to_cpu(ep->desc->wMaxPacketSize);
523 struct f_sourcesink *ss = ep->driver_data;
525 switch (ss->pattern) {
527 memset(req->buf, 0, req->length);
530 for (i = 0; i < req->length; i++)
531 *buf++ = (u8) ((i % max_packet_size) % 63);
538 static void source_sink_complete(struct usb_ep *ep, struct usb_request *req)
540 struct usb_composite_dev *cdev;
541 struct f_sourcesink *ss = ep->driver_data;
542 int status = req->status;
544 /* driver_data will be null if ep has been disabled */
548 cdev = ss->function.config->cdev;
552 case 0: /* normal completion? */
553 if (ep == ss->out_ep) {
554 check_read_data(ss, req);
555 if (ss->pattern != 2)
556 memset(req->buf, 0x55, req->length);
560 /* this endpoint is normally active while we're configured */
561 case -ECONNABORTED: /* hardware forced ep reset */
562 case -ECONNRESET: /* request dequeued */
563 case -ESHUTDOWN: /* disconnect from host */
564 VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status,
565 req->actual, req->length);
566 if (ep == ss->out_ep)
567 check_read_data(ss, req);
568 free_ep_req(ep, req);
571 case -EOVERFLOW: /* buffer overrun on read means that
572 * we didn't provide a big enough
577 DBG(cdev, "%s complete --> %d, %d/%d\n", ep->name,
578 status, req->actual, req->length);
580 case -EREMOTEIO: /* short read */
584 status = usb_ep_queue(ep, req, GFP_ATOMIC);
586 ERROR(cdev, "kill %s: resubmit %d bytes --> %d\n",
587 ep->name, req->length, status);
589 /* FIXME recover later ... somehow */
593 static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in,
594 bool is_iso, int speed)
597 struct usb_request *req;
600 for (i = 0; i < 8; i++) {
603 case USB_SPEED_SUPER:
604 size = ss->isoc_maxpacket *
605 (ss->isoc_mult + 1) *
606 (ss->isoc_maxburst + 1);
609 size = ss->isoc_maxpacket * (ss->isoc_mult + 1);
612 size = ss->isoc_maxpacket > 1023 ?
613 1023 : ss->isoc_maxpacket;
616 ep = is_in ? ss->iso_in_ep : ss->iso_out_ep;
617 req = ss_alloc_ep_req(ep, size);
619 ep = is_in ? ss->in_ep : ss->out_ep;
620 req = ss_alloc_ep_req(ep, 0);
626 req->complete = source_sink_complete;
628 reinit_write_data(ep, req);
629 else if (ss->pattern != 2)
630 memset(req->buf, 0x55, req->length);
632 status = usb_ep_queue(ep, req, GFP_ATOMIC);
634 struct usb_composite_dev *cdev;
636 cdev = ss->function.config->cdev;
637 ERROR(cdev, "start %s%s %s --> %d\n",
638 is_iso ? "ISO-" : "", is_in ? "IN" : "OUT",
640 free_ep_req(ep, req);
650 static void disable_source_sink(struct f_sourcesink *ss)
652 struct usb_composite_dev *cdev;
654 cdev = ss->function.config->cdev;
655 disable_endpoints(cdev, ss->in_ep, ss->out_ep, ss->iso_in_ep,
657 VDBG(cdev, "%s disabled\n", ss->function.name);
661 enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss,
665 int speed = cdev->gadget->speed;
668 /* one bulk endpoint writes (sources) zeroes IN (to the host) */
670 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
673 result = usb_ep_enable(ep);
676 ep->driver_data = ss;
678 result = source_sink_start_ep(ss, true, false, speed);
686 /* one bulk endpoint reads (sinks) anything OUT (from the host) */
688 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
691 result = usb_ep_enable(ep);
694 ep->driver_data = ss;
696 result = source_sink_start_ep(ss, false, false, speed);
707 /* one iso endpoint writes (sources) zeroes IN (to the host) */
710 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
713 result = usb_ep_enable(ep);
716 ep->driver_data = ss;
718 result = source_sink_start_ep(ss, true, true, speed);
728 /* one iso endpoint reads (sinks) anything OUT (from the host) */
731 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
734 result = usb_ep_enable(ep);
737 ep->driver_data = ss;
739 result = source_sink_start_ep(ss, false, true, speed);
748 DBG(cdev, "%s enabled, alt intf %d\n", ss->function.name, alt);
752 static int sourcesink_set_alt(struct usb_function *f,
753 unsigned intf, unsigned alt)
755 struct f_sourcesink *ss = func_to_ss(f);
756 struct usb_composite_dev *cdev = f->config->cdev;
758 disable_source_sink(ss);
759 return enable_source_sink(cdev, ss, alt);
762 static int sourcesink_get_alt(struct usb_function *f, unsigned intf)
764 struct f_sourcesink *ss = func_to_ss(f);
769 static void sourcesink_disable(struct usb_function *f)
771 struct f_sourcesink *ss = func_to_ss(f);
773 disable_source_sink(ss);
776 /*-------------------------------------------------------------------------*/
778 static int sourcesink_setup(struct usb_function *f,
779 const struct usb_ctrlrequest *ctrl)
781 struct usb_configuration *c = f->config;
782 struct usb_request *req = c->cdev->req;
783 int value = -EOPNOTSUPP;
784 u16 w_index = le16_to_cpu(ctrl->wIndex);
785 u16 w_value = le16_to_cpu(ctrl->wValue);
786 u16 w_length = le16_to_cpu(ctrl->wLength);
788 req->length = USB_COMP_EP0_BUFSIZ;
790 /* composite driver infrastructure handles everything except
791 * the two control test requests.
793 switch (ctrl->bRequest) {
796 * These are the same vendor-specific requests supported by
797 * Intel's USB 2.0 compliance test devices. We exceed that
798 * device spec by allowing multiple-packet requests.
800 * NOTE: the Control-OUT data stays in req->buf ... better
801 * would be copying it into a scratch buffer, so that other
802 * requests may safely intervene.
804 case 0x5b: /* control WRITE test -- fill the buffer */
805 if (ctrl->bRequestType != (USB_DIR_OUT|USB_TYPE_VENDOR))
807 if (w_value || w_index)
809 /* just read that many bytes into the buffer */
810 if (w_length > req->length)
814 case 0x5c: /* control READ test -- return the buffer */
815 if (ctrl->bRequestType != (USB_DIR_IN|USB_TYPE_VENDOR))
817 if (w_value || w_index)
819 /* expect those bytes are still in the buffer; send back */
820 if (w_length > req->length)
828 "unknown control req%02x.%02x v%04x i%04x l%d\n",
829 ctrl->bRequestType, ctrl->bRequest,
830 w_value, w_index, w_length);
833 /* respond with data transfer or status phase? */
835 VDBG(c->cdev, "source/sink req%02x.%02x v%04x i%04x l%d\n",
836 ctrl->bRequestType, ctrl->bRequest,
837 w_value, w_index, w_length);
840 value = usb_ep_queue(c->cdev->gadget->ep0, req, GFP_ATOMIC);
842 ERROR(c->cdev, "source/sink response, err %d\n",
846 /* device either stalls (value < 0) or reports success */
850 static struct usb_function *source_sink_alloc_func(
851 struct usb_function_instance *fi)
853 struct f_sourcesink *ss;
854 struct f_ss_opts *ss_opts;
856 ss = kzalloc(sizeof(*ss), GFP_KERNEL);
860 ss_opts = container_of(fi, struct f_ss_opts, func_inst);
862 mutex_lock(&ss_opts->lock);
864 mutex_unlock(&ss_opts->lock);
866 ss->pattern = ss_opts->pattern;
867 ss->isoc_interval = ss_opts->isoc_interval;
868 ss->isoc_maxpacket = ss_opts->isoc_maxpacket;
869 ss->isoc_mult = ss_opts->isoc_mult;
870 ss->isoc_maxburst = ss_opts->isoc_maxburst;
871 ss->buflen = ss_opts->bulk_buflen;
873 ss->function.name = "source/sink";
874 ss->function.bind = sourcesink_bind;
875 ss->function.set_alt = sourcesink_set_alt;
876 ss->function.get_alt = sourcesink_get_alt;
877 ss->function.disable = sourcesink_disable;
878 ss->function.setup = sourcesink_setup;
879 ss->function.strings = sourcesink_strings;
881 ss->function.free_func = sourcesink_free_func;
883 return &ss->function;
886 static inline struct f_ss_opts *to_f_ss_opts(struct config_item *item)
888 return container_of(to_config_group(item), struct f_ss_opts,
892 CONFIGFS_ATTR_STRUCT(f_ss_opts);
893 CONFIGFS_ATTR_OPS(f_ss_opts);
895 static void ss_attr_release(struct config_item *item)
897 struct f_ss_opts *ss_opts = to_f_ss_opts(item);
899 usb_put_function_instance(&ss_opts->func_inst);
902 static struct configfs_item_operations ss_item_ops = {
903 .release = ss_attr_release,
904 .show_attribute = f_ss_opts_attr_show,
905 .store_attribute = f_ss_opts_attr_store,
908 static ssize_t f_ss_opts_pattern_show(struct f_ss_opts *opts, char *page)
912 mutex_lock(&opts->lock);
913 result = sprintf(page, "%u\n", opts->pattern);
914 mutex_unlock(&opts->lock);
919 static ssize_t f_ss_opts_pattern_store(struct f_ss_opts *opts,
920 const char *page, size_t len)
925 mutex_lock(&opts->lock);
931 ret = kstrtou8(page, 0, &num);
935 if (num != 0 && num != 1 && num != 2) {
943 mutex_unlock(&opts->lock);
947 static struct f_ss_opts_attribute f_ss_opts_pattern =
948 __CONFIGFS_ATTR(pattern, S_IRUGO | S_IWUSR,
949 f_ss_opts_pattern_show,
950 f_ss_opts_pattern_store);
952 static ssize_t f_ss_opts_isoc_interval_show(struct f_ss_opts *opts, char *page)
956 mutex_lock(&opts->lock);
957 result = sprintf(page, "%u\n", opts->isoc_interval);
958 mutex_unlock(&opts->lock);
963 static ssize_t f_ss_opts_isoc_interval_store(struct f_ss_opts *opts,
964 const char *page, size_t len)
969 mutex_lock(&opts->lock);
975 ret = kstrtou8(page, 0, &num);
984 opts->isoc_interval = num;
987 mutex_unlock(&opts->lock);
991 static struct f_ss_opts_attribute f_ss_opts_isoc_interval =
992 __CONFIGFS_ATTR(isoc_interval, S_IRUGO | S_IWUSR,
993 f_ss_opts_isoc_interval_show,
994 f_ss_opts_isoc_interval_store);
996 static ssize_t f_ss_opts_isoc_maxpacket_show(struct f_ss_opts *opts, char *page)
1000 mutex_lock(&opts->lock);
1001 result = sprintf(page, "%u\n", opts->isoc_maxpacket);
1002 mutex_unlock(&opts->lock);
1007 static ssize_t f_ss_opts_isoc_maxpacket_store(struct f_ss_opts *opts,
1008 const char *page, size_t len)
1013 mutex_lock(&opts->lock);
1019 ret = kstrtou16(page, 0, &num);
1028 opts->isoc_maxpacket = num;
1031 mutex_unlock(&opts->lock);
1035 static struct f_ss_opts_attribute f_ss_opts_isoc_maxpacket =
1036 __CONFIGFS_ATTR(isoc_maxpacket, S_IRUGO | S_IWUSR,
1037 f_ss_opts_isoc_maxpacket_show,
1038 f_ss_opts_isoc_maxpacket_store);
1040 static ssize_t f_ss_opts_isoc_mult_show(struct f_ss_opts *opts, char *page)
1044 mutex_lock(&opts->lock);
1045 result = sprintf(page, "%u\n", opts->isoc_mult);
1046 mutex_unlock(&opts->lock);
1051 static ssize_t f_ss_opts_isoc_mult_store(struct f_ss_opts *opts,
1052 const char *page, size_t len)
1057 mutex_lock(&opts->lock);
1063 ret = kstrtou8(page, 0, &num);
1072 opts->isoc_mult = num;
1075 mutex_unlock(&opts->lock);
1079 static struct f_ss_opts_attribute f_ss_opts_isoc_mult =
1080 __CONFIGFS_ATTR(isoc_mult, S_IRUGO | S_IWUSR,
1081 f_ss_opts_isoc_mult_show,
1082 f_ss_opts_isoc_mult_store);
1084 static ssize_t f_ss_opts_isoc_maxburst_show(struct f_ss_opts *opts, char *page)
1088 mutex_lock(&opts->lock);
1089 result = sprintf(page, "%u\n", opts->isoc_maxburst);
1090 mutex_unlock(&opts->lock);
1095 static ssize_t f_ss_opts_isoc_maxburst_store(struct f_ss_opts *opts,
1096 const char *page, size_t len)
1101 mutex_lock(&opts->lock);
1107 ret = kstrtou8(page, 0, &num);
1116 opts->isoc_maxburst = num;
1119 mutex_unlock(&opts->lock);
1123 static struct f_ss_opts_attribute f_ss_opts_isoc_maxburst =
1124 __CONFIGFS_ATTR(isoc_maxburst, S_IRUGO | S_IWUSR,
1125 f_ss_opts_isoc_maxburst_show,
1126 f_ss_opts_isoc_maxburst_store);
1128 static ssize_t f_ss_opts_bulk_buflen_show(struct f_ss_opts *opts, char *page)
1132 mutex_lock(&opts->lock);
1133 result = sprintf(page, "%u\n", opts->bulk_buflen);
1134 mutex_unlock(&opts->lock);
1139 static ssize_t f_ss_opts_bulk_buflen_store(struct f_ss_opts *opts,
1140 const char *page, size_t len)
1145 mutex_lock(&opts->lock);
1151 ret = kstrtou32(page, 0, &num);
1155 opts->bulk_buflen = num;
1158 mutex_unlock(&opts->lock);
1162 static struct f_ss_opts_attribute f_ss_opts_bulk_buflen =
1163 __CONFIGFS_ATTR(buflen, S_IRUGO | S_IWUSR,
1164 f_ss_opts_bulk_buflen_show,
1165 f_ss_opts_bulk_buflen_store);
1167 static struct configfs_attribute *ss_attrs[] = {
1168 &f_ss_opts_pattern.attr,
1169 &f_ss_opts_isoc_interval.attr,
1170 &f_ss_opts_isoc_maxpacket.attr,
1171 &f_ss_opts_isoc_mult.attr,
1172 &f_ss_opts_isoc_maxburst.attr,
1173 &f_ss_opts_bulk_buflen.attr,
1177 static struct config_item_type ss_func_type = {
1178 .ct_item_ops = &ss_item_ops,
1179 .ct_attrs = ss_attrs,
1180 .ct_owner = THIS_MODULE,
1183 static void source_sink_free_instance(struct usb_function_instance *fi)
1185 struct f_ss_opts *ss_opts;
1187 ss_opts = container_of(fi, struct f_ss_opts, func_inst);
1191 static struct usb_function_instance *source_sink_alloc_inst(void)
1193 struct f_ss_opts *ss_opts;
1195 ss_opts = kzalloc(sizeof(*ss_opts), GFP_KERNEL);
1197 return ERR_PTR(-ENOMEM);
1198 mutex_init(&ss_opts->lock);
1199 ss_opts->func_inst.free_func_inst = source_sink_free_instance;
1200 ss_opts->isoc_interval = GZERO_ISOC_INTERVAL;
1201 ss_opts->isoc_maxpacket = GZERO_ISOC_MAXPACKET;
1202 ss_opts->bulk_buflen = GZERO_BULK_BUFLEN;
1204 config_group_init_type_name(&ss_opts->func_inst.group, "",
1207 return &ss_opts->func_inst;
1209 DECLARE_USB_FUNCTION(SourceSink, source_sink_alloc_inst,
1210 source_sink_alloc_func);
1212 static int __init sslb_modinit(void)
1216 ret = usb_function_register(&SourceSinkusb_func);
1221 usb_function_unregister(&SourceSinkusb_func);
1224 static void __exit sslb_modexit(void)
1226 usb_function_unregister(&SourceSinkusb_func);
1229 module_init(sslb_modinit);
1230 module_exit(sslb_modexit);
1232 MODULE_LICENSE("GPL");