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Merge remote-tracking branch 'overlayfs/overlayfs-next'
[deliverable/linux.git] / drivers / usb / gadget / udc / dummy_hcd.c
CommitLineData
1da177e4
LT		 1/*
2 * dummy_hcd.c -- Dummy/Loopback USB host and device emulator driver.
3 *
4 * Maintainer: Alan Stern <stern@rowland.harvard.edu>
5 *
6 * Copyright (C) 2003 David Brownell
7 * Copyright (C) 2003-2005 Alan Stern
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
1da177e4
LT		 13 */
14
15
16/*
17 * This exposes a device side "USB gadget" API, driven by requests to a
18 * Linux-USB host controller driver. USB traffic is simulated; there's
19 * no need for USB hardware. Use this with two other drivers:
20 *
21 * - Gadget driver, responding to requests (slave);
22 * - Host-side device driver, as already familiar in Linux.
23 *
24 * Having this all in one kernel can help some stages of development,
25 * bypassing some hardware (and driver) issues. UML could help too.
26 */
27
1da177e4
LT		 28#include <linux/module.h>
29#include <linux/kernel.h>
30#include <linux/delay.h>
31#include <linux/ioport.h>
1da177e4 32#include <linux/slab.h>
1da177e4
LT		 33#include <linux/errno.h>
34#include <linux/init.h>
35#include <linux/timer.h>
36#include <linux/list.h>
37#include <linux/interrupt.h>
d052d1be 38#include <linux/platform_device.h>
1da177e4 39#include <linux/usb.h>
9454a57a 40#include <linux/usb/gadget.h>
27729aad 41#include <linux/usb/hcd.h>
14fce33a 42#include <linux/scatterlist.h>
1da177e4
LT		 43
44#include <asm/byteorder.h>
18f2cbaa 45#include <linux/io.h>
1da177e4 46#include <asm/irq.h>
1da177e4
LT		 47#include <asm/unaligned.h>
48
1da177e4 49#define DRIVER_DESC "USB Host+Gadget Emulator"
391eca9d 50#define DRIVER_VERSION "02 May 2005"
1da177e4 51
caf29f62
AS		 52#define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */
53
18f2cbaa
SAS		 54static const char driver_name[] = "dummy_hcd";
55static const char driver_desc[] = "USB Host+Gadget Emulator";
1da177e4 56
18f2cbaa 57static const char gadget_name[] = "dummy_udc";
1da177e4 58
18f2cbaa
SAS		 59MODULE_DESCRIPTION(DRIVER_DESC);
60MODULE_AUTHOR("David Brownell");
61MODULE_LICENSE("GPL");
1da177e4 62
1cd8fd28
TB		 63struct dummy_hcd_module_parameters {
64 bool is_super_speed;
7eca4c5a 65 bool is_high_speed;
c7a1db45 66 unsigned int num;
1cd8fd28
TB		 67};
68
69static struct dummy_hcd_module_parameters mod_data = {
7eca4c5a
TB		 70 .is_super_speed = false,
71 .is_high_speed = true,
c7a1db45 72 .num = 1,
1cd8fd28
TB		 73};
74module_param_named(is_super_speed, mod_data.is_super_speed, bool, S_IRUGO);
75MODULE_PARM_DESC(is_super_speed, "true to simulate SuperSpeed connection");
7eca4c5a
TB		 76module_param_named(is_high_speed, mod_data.is_high_speed, bool, S_IRUGO);
77MODULE_PARM_DESC(is_high_speed, "true to simulate HighSpeed connection");
c7a1db45
SAS		 78module_param_named(num, mod_data.num, uint, S_IRUGO);
79MODULE_PARM_DESC(num, "number of emulated controllers");
1da177e4
LT		 80/*-------------------------------------------------------------------------*/
81
82/* gadget side driver data structres */
83struct dummy_ep {
84 struct list_head queue;
85 unsigned long last_io; /* jiffies timestamp */
86 struct usb_gadget *gadget;
87 const struct usb_endpoint_descriptor *desc;
88 struct usb_ep ep;
18f2cbaa
SAS		 89 unsigned halted:1;
90 unsigned wedged:1;
91 unsigned already_seen:1;
92 unsigned setup_stage:1;
a54c979f 93 unsigned stream_en:1;
1da177e4
LT		 94};
95
96struct dummy_request {
97 struct list_head queue; /* ep's requests */
98 struct usb_request req;
99};
100
18f2cbaa 101static inline struct dummy_ep *usb_ep_to_dummy_ep(struct usb_ep *_ep)
1da177e4 102{
18f2cbaa 103 return container_of(_ep, struct dummy_ep, ep);
1da177e4
LT		 104}
105
106static inline struct dummy_request *usb_request_to_dummy_request
107 (struct usb_request *_req)
108{
18f2cbaa 109 return container_of(_req, struct dummy_request, req);
1da177e4
LT		 110}
111
112/*-------------------------------------------------------------------------*/
113
114/*
115 * Every device has ep0 for control requests, plus up to 30 more endpoints,
116 * in one of two types:
117 *
118 * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint
119 * number can be changed. Names like "ep-a" are used for this type.
120 *
121 * - Fixed Function: in other cases. some characteristics may be mutable;
122 * that'd be hardware-specific. Names like "ep12out-bulk" are used.
123 *
124 * Gadget drivers are responsible for not setting up conflicting endpoint
125 * configurations, illegal or unsupported packet lengths, and so on.
126 */
127
18f2cbaa 128static const char ep0name[] = "ep0";
1da177e4 129
7a3b8e70
RB		 130static const struct {
131 const char *name;
132 const struct usb_ep_caps caps;
133} ep_info[] = {
134#define EP_INFO(_name, _caps) \
135 { \
136 .name = _name, \
137 .caps = _caps, \
138 }
1da177e4 139
7a3b8e70
RB		 140 /* everyone has ep0 */
141 EP_INFO(ep0name,
142 USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)),
1d16638e 143 /* act like a pxa250: fifteen fixed function endpoints */
7a3b8e70
RB		 144 EP_INFO("ep1in-bulk",
145 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
146 EP_INFO("ep2out-bulk",
147 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
148 EP_INFO("ep3in-iso",
149 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)),
150 EP_INFO("ep4out-iso",
151 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)),
152 EP_INFO("ep5in-int",
153 USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)),
154 EP_INFO("ep6in-bulk",
155 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
156 EP_INFO("ep7out-bulk",
157 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
158 EP_INFO("ep8in-iso",
159 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)),
160 EP_INFO("ep9out-iso",
161 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)),
162 EP_INFO("ep10in-int",
163 USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)),
164 EP_INFO("ep11in-bulk",
165 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
166 EP_INFO("ep12out-bulk",
167 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
168 EP_INFO("ep13in-iso",
169 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)),
170 EP_INFO("ep14out-iso",
171 USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)),
172 EP_INFO("ep15in-int",
173 USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)),
1da177e4 174 /* or like sa1100: two fixed function endpoints */
7a3b8e70
RB		 175 EP_INFO("ep1out-bulk",
176 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
177 EP_INFO("ep2in-bulk",
178 USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
1d16638e 179 /* and now some generic EPs so we have enough in multi config */
7a3b8e70
RB		 180 EP_INFO("ep3out",
181 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
182 EP_INFO("ep4in",
183 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
184 EP_INFO("ep5out",
185 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
186 EP_INFO("ep6out",
187 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
188 EP_INFO("ep7in",
189 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
190 EP_INFO("ep8out",
191 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
192 EP_INFO("ep9in",
193 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
194 EP_INFO("ep10out",
195 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
196 EP_INFO("ep11out",
197 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
198 EP_INFO("ep12in",
199 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
200 EP_INFO("ep13out",
201 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
202 EP_INFO("ep14in",
203 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)),
204 EP_INFO("ep15out",
205 USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)),
206
207#undef EP_INFO
1da177e4 208};
7a3b8e70
RB		 209
210#define DUMMY_ENDPOINTS ARRAY_SIZE(ep_info)
1da177e4 211
d9b76251
AS		 212/*-------------------------------------------------------------------------*/
213
1da177e4
LT		 214#define FIFO_SIZE 64
215
216struct urbp {
217 struct urb *urb;
218 struct list_head urbp_list;
14fce33a
SAS		 219 struct sg_mapping_iter miter;
220 u32 miter_started;
1da177e4
LT		 221};
222
391eca9d
AS		 223
224enum dummy_rh_state {
225 DUMMY_RH_RESET,
226 DUMMY_RH_SUSPENDED,
227 DUMMY_RH_RUNNING
228};
229
cdfcbd2c
TB		 230struct dummy_hcd {
231 struct dummy *dum;
232 enum dummy_rh_state rh_state;
233 struct timer_list timer;
234 u32 port_status;
235 u32 old_status;
236 unsigned long re_timeout;
237
238 struct usb_device *udev;
239 struct list_head urbp_list;
a54c979f
SAS		 240 u32 stream_en_ep;
241 u8 num_stream[30 / 2];
cdfcbd2c
TB		 242
243 unsigned active:1;
244 unsigned old_active:1;
245 unsigned resuming:1;
246};
247
1da177e4
LT		 248struct dummy {
249 spinlock_t lock;
250
251 /*
252 * SLAVE/GADGET side support
253 */
18f2cbaa 254 struct dummy_ep ep[DUMMY_ENDPOINTS];
1da177e4
LT		 255 int address;
256 struct usb_gadget gadget;
257 struct usb_gadget_driver *driver;
258 struct dummy_request fifo_req;
18f2cbaa 259 u8 fifo_buf[FIFO_SIZE];
1da177e4 260 u16 devstatus;
391eca9d 261 unsigned udc_suspended:1;
f1c39fad 262 unsigned pullup:1;
1da177e4
LT		 263
264 /*
265 * MASTER/HOST side support
266 */
cdfcbd2c 267 struct dummy_hcd *hs_hcd;
1cd8fd28 268 struct dummy_hcd *ss_hcd;
1da177e4
LT		 269};
270
cdfcbd2c 271static inline struct dummy_hcd *hcd_to_dummy_hcd(struct usb_hcd *hcd)
1da177e4 272{
cdfcbd2c 273 return (struct dummy_hcd *) (hcd->hcd_priv);
1da177e4
LT		 274}
275
cdfcbd2c 276static inline struct usb_hcd *dummy_hcd_to_hcd(struct dummy_hcd *dum)
1da177e4
LT		 277{
278 return container_of((void *) dum, struct usb_hcd, hcd_priv);
279}
280
cdfcbd2c 281static inline struct device *dummy_dev(struct dummy_hcd *dum)
1da177e4 282{
cdfcbd2c 283 return dummy_hcd_to_hcd(dum)->self.controller;
1da177e4
LT		 284}
285
18f2cbaa 286static inline struct device *udc_dev(struct dummy *dum)
d9b76251
AS		 287{
288 return dum->gadget.dev.parent;
289}
290
18f2cbaa 291static inline struct dummy *ep_to_dummy(struct dummy_ep *ep)
1da177e4 292{
18f2cbaa 293 return container_of(ep->gadget, struct dummy, gadget);
1da177e4
LT		 294}
295
cdfcbd2c 296static inline struct dummy_hcd *gadget_to_dummy_hcd(struct usb_gadget *gadget)
1da177e4 297{
cdfcbd2c 298 struct dummy *dum = container_of(gadget, struct dummy, gadget);
1cd8fd28
TB		 299 if (dum->gadget.speed == USB_SPEED_SUPER)
300 return dum->ss_hcd;
301 else
302 return dum->hs_hcd;
1da177e4
LT		 303}
304
18f2cbaa 305static inline struct dummy *gadget_dev_to_dummy(struct device *dev)
1da177e4 306{
18f2cbaa 307 return container_of(dev, struct dummy, gadget.dev);
1da177e4
LT		 308}
309
1da177e4
LT		 310/*-------------------------------------------------------------------------*/
311
f1c39fad
AS		 312/* SLAVE/GADGET SIDE UTILITY ROUTINES */
313
314/* called with spinlock held */
18f2cbaa 315static void nuke(struct dummy *dum, struct dummy_ep *ep)
f1c39fad 316{
18f2cbaa 317 while (!list_empty(&ep->queue)) {
f1c39fad
AS		 318 struct dummy_request *req;
319
18f2cbaa
SAS		 320 req = list_entry(ep->queue.next, struct dummy_request, queue);
321 list_del_init(&req->queue);
f1c39fad
AS		 322 req->req.status = -ESHUTDOWN;
323
18f2cbaa 324 spin_unlock(&dum->lock);
304f7e5e 325 usb_gadget_giveback_request(&ep->ep, &req->req);
18f2cbaa 326 spin_lock(&dum->lock);
f1c39fad
AS		 327 }
328}
329
330/* caller must hold lock */
18f2cbaa 331static void stop_activity(struct dummy *dum)
f1c39fad
AS		 332{
333 struct dummy_ep *ep;
334
335 /* prevent any more requests */
336 dum->address = 0;
337
338 /* The timer is left running so that outstanding URBs can fail */
339
340 /* nuke any pending requests first, so driver i/o is quiesced */
18f2cbaa
SAS		 341 list_for_each_entry(ep, &dum->gadget.ep_list, ep.ep_list)
342 nuke(dum, ep);
f1c39fad
AS		 343
344 /* driver now does any non-usb quiescing necessary */
345}
346
1cd8fd28
TB		 347/**
348 * set_link_state_by_speed() - Sets the current state of the link according to
349 * the hcd speed
350 * @dum_hcd: pointer to the dummy_hcd structure to update the link state for
351 *
352 * This function updates the port_status according to the link state and the
353 * speed of the hcd.
354 */
355static void set_link_state_by_speed(struct dummy_hcd *dum_hcd)
356{
357 struct dummy *dum = dum_hcd->dum;
358
359 if (dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3) {
360 if ((dum_hcd->port_status & USB_SS_PORT_STAT_POWER) == 0) {
361 dum_hcd->port_status = 0;
362 } else if (!dum->pullup || dum->udc_suspended) {
363 /* UDC suspend must cause a disconnect */
364 dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
365 USB_PORT_STAT_ENABLE);
366 if ((dum_hcd->old_status &
367 USB_PORT_STAT_CONNECTION) != 0)
368 dum_hcd->port_status |=
369 (USB_PORT_STAT_C_CONNECTION << 16);
370 } else {
371 /* device is connected and not suspended */
372 dum_hcd->port_status |= (USB_PORT_STAT_CONNECTION |
373 USB_PORT_STAT_SPEED_5GBPS) ;
374 if ((dum_hcd->old_status &
375 USB_PORT_STAT_CONNECTION) == 0)
376 dum_hcd->port_status |=
377 (USB_PORT_STAT_C_CONNECTION << 16);
378 if ((dum_hcd->port_status &
379 USB_PORT_STAT_ENABLE) == 1 &&
380 (dum_hcd->port_status &
381 USB_SS_PORT_LS_U0) == 1 &&
382 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
383 dum_hcd->active = 1;
384 }
385 } else {
386 if ((dum_hcd->port_status & USB_PORT_STAT_POWER) == 0) {
387 dum_hcd->port_status = 0;
388 } else if (!dum->pullup || dum->udc_suspended) {
389 /* UDC suspend must cause a disconnect */
390 dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
391 USB_PORT_STAT_ENABLE |
392 USB_PORT_STAT_LOW_SPEED |
393 USB_PORT_STAT_HIGH_SPEED |
394 USB_PORT_STAT_SUSPEND);
395 if ((dum_hcd->old_status &
396 USB_PORT_STAT_CONNECTION) != 0)
397 dum_hcd->port_status |=
398 (USB_PORT_STAT_C_CONNECTION << 16);
399 } else {
400 dum_hcd->port_status |= USB_PORT_STAT_CONNECTION;
401 if ((dum_hcd->old_status &
402 USB_PORT_STAT_CONNECTION) == 0)
403 dum_hcd->port_status |=
404 (USB_PORT_STAT_C_CONNECTION << 16);
405 if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0)
406 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
407 else if ((dum_hcd->port_status &
408 USB_PORT_STAT_SUSPEND) == 0 &&
409 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
410 dum_hcd->active = 1;
411 }
412 }
413}
414
f1c39fad 415/* caller must hold lock */
cdfcbd2c 416static void set_link_state(struct dummy_hcd *dum_hcd)
f1c39fad 417{
cdfcbd2c
TB		 418 struct dummy *dum = dum_hcd->dum;
419
420 dum_hcd->active = 0;
1cd8fd28
TB		 421 if (dum->pullup)
422 if ((dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3 &&
423 dum->gadget.speed != USB_SPEED_SUPER) ||
424 (dummy_hcd_to_hcd(dum_hcd)->speed != HCD_USB3 &&
425 dum->gadget.speed == USB_SPEED_SUPER))
426 return;
427
428 set_link_state_by_speed(dum_hcd);
f1c39fad 429
cdfcbd2c
TB		 430 if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0 ||
431 dum_hcd->active)
432 dum_hcd->resuming = 0;
f1c39fad 433
8480484d 434 /* Currently !connected or in reset */
cdfcbd2c
TB		 435 if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0 ||
436 (dum_hcd->port_status & USB_PORT_STAT_RESET) != 0) {
8480484d
AS		 437 unsigned disconnect = USB_PORT_STAT_CONNECTION &
438 dum_hcd->old_status & (~dum_hcd->port_status);
439 unsigned reset = USB_PORT_STAT_RESET &
440 (~dum_hcd->old_status) & dum_hcd->port_status;
441
442 /* Report reset and disconnect events to the driver */
443 if (dum->driver && (disconnect || reset)) {
1cd8fd28
TB		 444 stop_activity(dum);
445 spin_unlock(&dum->lock);
8480484d
AS		 446 if (reset)
447 usb_gadget_udc_reset(&dum->gadget, dum->driver);
448 else
449 dum->driver->disconnect(&dum->gadget);
1cd8fd28 450 spin_lock(&dum->lock);
f1c39fad 451 }
cdfcbd2c
TB		 452 } else if (dum_hcd->active != dum_hcd->old_active) {
453 if (dum_hcd->old_active && dum->driver->suspend) {
1cd8fd28
TB		 454 spin_unlock(&dum->lock);
455 dum->driver->suspend(&dum->gadget);
456 spin_lock(&dum->lock);
457 } else if (!dum_hcd->old_active && dum->driver->resume) {
458 spin_unlock(&dum->lock);
459 dum->driver->resume(&dum->gadget);
460 spin_lock(&dum->lock);
f1c39fad
AS		 461 }
462 }
463
cdfcbd2c
TB		 464 dum_hcd->old_status = dum_hcd->port_status;
465 dum_hcd->old_active = dum_hcd->active;
f1c39fad
AS		 466}
467
468/*-------------------------------------------------------------------------*/
469
1da177e4
LT		 470/* SLAVE/GADGET SIDE DRIVER
471 *
472 * This only tracks gadget state. All the work is done when the host
473 * side tries some (emulated) i/o operation. Real device controller
474 * drivers would do real i/o using dma, fifos, irqs, timers, etc.
475 */
476
477#define is_enabled(dum) \
478 (dum->port_status & USB_PORT_STAT_ENABLE)
479
18f2cbaa
SAS		 480static int dummy_enable(struct usb_ep *_ep,
481 const struct usb_endpoint_descriptor *desc)
1da177e4
LT		 482{
483 struct dummy *dum;
cdfcbd2c 484 struct dummy_hcd *dum_hcd;
1da177e4
LT		 485 struct dummy_ep *ep;
486 unsigned max;
487 int retval;
488
18f2cbaa 489 ep = usb_ep_to_dummy_ep(_ep);
1da177e4
LT		 490 if (!_ep || !desc || ep->desc || _ep->name == ep0name
491 || desc->bDescriptorType != USB_DT_ENDPOINT)
492 return -EINVAL;
18f2cbaa 493 dum = ep_to_dummy(ep);
cdfcbd2c
TB		 494 if (!dum->driver)
495 return -ESHUTDOWN;
719e52cb
SAS		 496
497 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
cdfcbd2c 498 if (!is_enabled(dum_hcd))
1da177e4 499 return -ESHUTDOWN;
cdfcbd2c
TB		 500
501 /*
502 * For HS/FS devices only bits 0..10 of the wMaxPacketSize represent the
503 * maximum packet size.
1cd8fd28 504 * For SS devices the wMaxPacketSize is limited by 1024.
cdfcbd2c 505 */
29cc8897 506 max = usb_endpoint_maxp(desc) & 0x7ff;
1da177e4
LT		 507
508 /* drivers must not request bad settings, since lower levels
509 * (hardware or its drivers) may not check. some endpoints
510 * can't do iso, many have maxpacket limitations, etc.
511 *
512 * since this "hardware" driver is here to help debugging, we
513 * have some extra sanity checks. (there could be more though,
514 * especially for "ep9out" style fixed function ones.)
515 */
516 retval = -EINVAL;
59f08e6d 517 switch (usb_endpoint_type(desc)) {
1da177e4 518 case USB_ENDPOINT_XFER_BULK:
18f2cbaa
SAS		 519 if (strstr(ep->ep.name, "-iso")
520 || strstr(ep->ep.name, "-int")) {
1da177e4
LT		 521 goto done;
522 }
523 switch (dum->gadget.speed) {
1cd8fd28
TB		 524 case USB_SPEED_SUPER:
525 if (max == 1024)
526 break;
527 goto done;
1da177e4
LT		 528 case USB_SPEED_HIGH:
529 if (max == 512)
530 break;
9063ff44
IL		 531 goto done;
532 case USB_SPEED_FULL:
533 if (max == 8 || max == 16 || max == 32 || max == 64)
1da177e4
LT		 534 /* we'll fake any legal size */
535 break;
9063ff44
IL		 536 /* save a return statement */
537 default:
538 goto done;
1da177e4
LT		 539 }
540 break;
541 case USB_ENDPOINT_XFER_INT:
18f2cbaa 542 if (strstr(ep->ep.name, "-iso")) /* bulk is ok */
1da177e4
LT		 543 goto done;
544 /* real hardware might not handle all packet sizes */
545 switch (dum->gadget.speed) {
1cd8fd28 546 case USB_SPEED_SUPER:
1da177e4
LT		 547 case USB_SPEED_HIGH:
548 if (max <= 1024)
549 break;
550 /* save a return statement */
551 case USB_SPEED_FULL:
552 if (max <= 64)
553 break;
554 /* save a return statement */
555 default:
556 if (max <= 8)
557 break;
558 goto done;
559 }
560 break;
561 case USB_ENDPOINT_XFER_ISOC:
18f2cbaa
SAS		 562 if (strstr(ep->ep.name, "-bulk")
563 || strstr(ep->ep.name, "-int"))
1da177e4
LT		 564 goto done;
565 /* real hardware might not handle all packet sizes */
566 switch (dum->gadget.speed) {
1cd8fd28 567 case USB_SPEED_SUPER:
1da177e4
LT		 568 case USB_SPEED_HIGH:
569 if (max <= 1024)
570 break;
571 /* save a return statement */
572 case USB_SPEED_FULL:
573 if (max <= 1023)
574 break;
575 /* save a return statement */
576 default:
577 goto done;
578 }
579 break;
580 default:
581 /* few chips support control except on ep0 */
582 goto done;
583 }
584
585 _ep->maxpacket = max;
a54c979f
SAS		 586 if (usb_ss_max_streams(_ep->comp_desc)) {
587 if (!usb_endpoint_xfer_bulk(desc)) {
588 dev_err(udc_dev(dum), "Can't enable stream support on "
589 "non-bulk ep %s\n", _ep->name);
590 return -EINVAL;
591 }
592 ep->stream_en = 1;
593 }
3cf0ad02 594 ep->desc = desc;
1da177e4 595
a54c979f 596 dev_dbg(udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d stream %s\n",
1da177e4
LT		 597 _ep->name,
598 desc->bEndpointAddress & 0x0f,
599 (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
600 ({ char *val;
59f08e6d 601 switch (usb_endpoint_type(desc)) {
7c884fe4
TB		 602 case USB_ENDPOINT_XFER_BULK:
603 val = "bulk";
604 break;
605 case USB_ENDPOINT_XFER_ISOC:
606 val = "iso";
607 break;
608 case USB_ENDPOINT_XFER_INT:
609 val = "intr";
610 break;
611 default:
612 val = "ctrl";
613 break;
2b84f92b 614 } val; }),
a54c979f 615 max, ep->stream_en ? "enabled" : "disabled");
1da177e4
LT		 616
617 /* at this point real hardware should be NAKing transfers
618 * to that endpoint, until a buffer is queued to it.
619 */
851a526d 620 ep->halted = ep->wedged = 0;
1da177e4
LT		 621 retval = 0;
622done:
623 return retval;
624}
625
18f2cbaa 626static int dummy_disable(struct usb_ep *_ep)
1da177e4
LT		 627{
628 struct dummy_ep *ep;
629 struct dummy *dum;
630 unsigned long flags;
1da177e4 631
18f2cbaa 632 ep = usb_ep_to_dummy_ep(_ep);
1da177e4
LT		 633 if (!_ep || !ep->desc || _ep->name == ep0name)
634 return -EINVAL;
18f2cbaa 635 dum = ep_to_dummy(ep);
1da177e4 636
18f2cbaa 637 spin_lock_irqsave(&dum->lock, flags);
1da177e4 638 ep->desc = NULL;
a54c979f 639 ep->stream_en = 0;
18f2cbaa
SAS		 640 nuke(dum, ep);
641 spin_unlock_irqrestore(&dum->lock, flags);
1da177e4 642
18f2cbaa 643 dev_dbg(udc_dev(dum), "disabled %s\n", _ep->name);
849b1333 644 return 0;
1da177e4
LT		 645}
646
18f2cbaa
SAS		 647static struct usb_request *dummy_alloc_request(struct usb_ep *_ep,
648 gfp_t mem_flags)
1da177e4 649{
1da177e4
LT		 650 struct dummy_request *req;
651
652 if (!_ep)
653 return NULL;
1da177e4 654
7039f422 655 req = kzalloc(sizeof(*req), mem_flags);
1da177e4
LT		 656 if (!req)
657 return NULL;
18f2cbaa 658 INIT_LIST_HEAD(&req->queue);
1da177e4
LT		 659 return &req->req;
660}
661
18f2cbaa 662static void dummy_free_request(struct usb_ep *_ep, struct usb_request *_req)
1da177e4 663{
1da177e4
LT		 664 struct dummy_request *req;
665
f99987bb 666 if (!_ep || !_req) {
72688dc9 667 WARN_ON(1);
1da177e4 668 return;
f99987bb 669 }
1da177e4 670
18f2cbaa
SAS		 671 req = usb_request_to_dummy_request(_req);
672 WARN_ON(!list_empty(&req->queue));
673 kfree(req);
1da177e4
LT		 674}
675
18f2cbaa 676static void fifo_complete(struct usb_ep *ep, struct usb_request *req)
1da177e4
LT		 677{
678}
679
18f2cbaa 680static int dummy_queue(struct usb_ep *_ep, struct usb_request *_req,
55016f10 681 gfp_t mem_flags)
1da177e4
LT		 682{
683 struct dummy_ep *ep;
684 struct dummy_request *req;
685 struct dummy *dum;
cdfcbd2c 686 struct dummy_hcd *dum_hcd;
1da177e4
LT		 687 unsigned long flags;
688
18f2cbaa
SAS		 689 req = usb_request_to_dummy_request(_req);
690 if (!_req || !list_empty(&req->queue) || !_req->complete)
1da177e4
LT		 691 return -EINVAL;
692
18f2cbaa 693 ep = usb_ep_to_dummy_ep(_ep);
1da177e4
LT		 694 if (!_ep || (!ep->desc && _ep->name != ep0name))
695 return -EINVAL;
696
18f2cbaa 697 dum = ep_to_dummy(ep);
719e52cb 698 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
cdfcbd2c 699 if (!dum->driver || !is_enabled(dum_hcd))
1da177e4
LT		 700 return -ESHUTDOWN;
701
702#if 0
18f2cbaa 703 dev_dbg(udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n",
1da177e4
LT		 704 ep, _req, _ep->name, _req->length, _req->buf);
705#endif
1da177e4
LT		 706 _req->status = -EINPROGRESS;
707 _req->actual = 0;
18f2cbaa 708 spin_lock_irqsave(&dum->lock, flags);
1da177e4
LT		 709
710 /* implement an emulated single-request FIFO */
711 if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
18f2cbaa
SAS		 712 list_empty(&dum->fifo_req.queue) &&
713 list_empty(&ep->queue) &&
1da177e4
LT		 714 _req->length <= FIFO_SIZE) {
715 req = &dum->fifo_req;
716 req->req = *_req;
717 req->req.buf = dum->fifo_buf;
18f2cbaa 718 memcpy(dum->fifo_buf, _req->buf, _req->length);
1da177e4
LT		 719 req->req.context = dum;
720 req->req.complete = fifo_complete;
721
c728df70 722 list_add_tail(&req->queue, &ep->queue);
18f2cbaa 723 spin_unlock(&dum->lock);
1da177e4
LT		 724 _req->actual = _req->length;
725 _req->status = 0;
304f7e5e 726 usb_gadget_giveback_request(_ep, _req);
18f2cbaa 727 spin_lock(&dum->lock);
c728df70
DB		 728 } else
729 list_add_tail(&req->queue, &ep->queue);
18f2cbaa 730 spin_unlock_irqrestore(&dum->lock, flags);
1da177e4
LT		 731
732 /* real hardware would likely enable transfers here, in case
733 * it'd been left NAKing.
734 */
735 return 0;
736}
737
18f2cbaa 738static int dummy_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1da177e4
LT		 739{
740 struct dummy_ep *ep;
741 struct dummy *dum;
742 int retval = -EINVAL;
743 unsigned long flags;
744 struct dummy_request *req = NULL;
745
746 if (!_ep || !_req)
747 return retval;
18f2cbaa
SAS		 748 ep = usb_ep_to_dummy_ep(_ep);
749 dum = ep_to_dummy(ep);
1da177e4
LT		 750
751 if (!dum->driver)
752 return -ESHUTDOWN;
753
18f2cbaa
SAS		 754 local_irq_save(flags);
755 spin_lock(&dum->lock);
756 list_for_each_entry(req, &ep->queue, queue) {
1da177e4 757 if (&req->req == _req) {
18f2cbaa 758 list_del_init(&req->queue);
1da177e4
LT		 759 _req->status = -ECONNRESET;
760 retval = 0;
761 break;
762 }
763 }
18f2cbaa 764 spin_unlock(&dum->lock);
1da177e4
LT		 765
766 if (retval == 0) {
18f2cbaa 767 dev_dbg(udc_dev(dum),
1da177e4
LT		 768 "dequeued req %p from %s, len %d buf %p\n",
769 req, _ep->name, _req->length, _req->buf);
304f7e5e 770 usb_gadget_giveback_request(_ep, _req);
1da177e4 771 }
18f2cbaa 772 local_irq_restore(flags);
1da177e4
LT		 773 return retval;
774}
775
776static int
851a526d 777dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
1da177e4
LT		 778{
779 struct dummy_ep *ep;
780 struct dummy *dum;
781
782 if (!_ep)
783 return -EINVAL;
18f2cbaa
SAS		 784 ep = usb_ep_to_dummy_ep(_ep);
785 dum = ep_to_dummy(ep);
1da177e4
LT		 786 if (!dum->driver)
787 return -ESHUTDOWN;
788 if (!value)
851a526d 789 ep->halted = ep->wedged = 0;
1da177e4 790 else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
18f2cbaa 791 !list_empty(&ep->queue))
1da177e4 792 return -EAGAIN;
851a526d 793 else {
1da177e4 794 ep->halted = 1;
851a526d
AS		 795 if (wedged)
796 ep->wedged = 1;
797 }
1da177e4
LT		 798 /* FIXME clear emulated data toggle too */
799 return 0;
800}
801
851a526d
AS		 802static int
803dummy_set_halt(struct usb_ep *_ep, int value)
804{
805 return dummy_set_halt_and_wedge(_ep, value, 0);
806}
807
808static int dummy_set_wedge(struct usb_ep *_ep)
809{
810 if (!_ep || _ep->name == ep0name)
811 return -EINVAL;
812 return dummy_set_halt_and_wedge(_ep, 1, 1);
813}
814
1da177e4
LT		 815static const struct usb_ep_ops dummy_ep_ops = {
816 .enable = dummy_enable,
817 .disable = dummy_disable,
818
819 .alloc_request = dummy_alloc_request,
820 .free_request = dummy_free_request,
821
1da177e4
LT		 822 .queue = dummy_queue,
823 .dequeue = dummy_dequeue,
824
825 .set_halt = dummy_set_halt,
851a526d 826 .set_wedge = dummy_set_wedge,
1da177e4
LT		 827};
828
829/*-------------------------------------------------------------------------*/
830
831/* there are both host and device side versions of this call ... */
18f2cbaa 832static int dummy_g_get_frame(struct usb_gadget *_gadget)
1da177e4 833{
04c4d8d4 834 struct timespec64 ts64;
1da177e4 835
04c4d8d4
WP		 836 ktime_get_ts64(&ts64);
837 return ts64.tv_nsec / NSEC_PER_MSEC;
1da177e4
LT		 838}
839
18f2cbaa 840static int dummy_wakeup(struct usb_gadget *_gadget)
1da177e4 841{
cdfcbd2c 842 struct dummy_hcd *dum_hcd;
1da177e4 843
cdfcbd2c
TB		 844 dum_hcd = gadget_to_dummy_hcd(_gadget);
845 if (!(dum_hcd->dum->devstatus & ((1 << USB_DEVICE_B_HNP_ENABLE)
5742b0c9 846 | (1 << USB_DEVICE_REMOTE_WAKEUP))))
1da177e4 847 return -EINVAL;
cdfcbd2c 848 if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0)
391eca9d 849 return -ENOLINK;
cdfcbd2c
TB		 850 if ((dum_hcd->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
851 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
391eca9d
AS		 852 return -EIO;
853
854 /* FIXME: What if the root hub is suspended but the port isn't? */
1da177e4
LT		 855
856 /* hub notices our request, issues downstream resume, etc */
cdfcbd2c
TB		 857 dum_hcd->resuming = 1;
858 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(20);
859 mod_timer(&dummy_hcd_to_hcd(dum_hcd)->rh_timer, dum_hcd->re_timeout);
1da177e4
LT		 860 return 0;
861}
862
18f2cbaa 863static int dummy_set_selfpowered(struct usb_gadget *_gadget, int value)
1da177e4
LT		 864{
865 struct dummy *dum;
866
5d9cb6af 867 _gadget->is_selfpowered = (value != 0);
18f2cbaa 868 dum = gadget_to_dummy_hcd(_gadget)->dum;
1da177e4
LT		 869 if (value)
870 dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
871 else
872 dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
873 return 0;
874}
875
d262127c 876static void dummy_udc_update_ep0(struct dummy *dum)
b5738413 877{
c6884191 878 if (dum->gadget.speed == USB_SPEED_SUPER)
b5738413 879 dum->ep[0].ep.maxpacket = 9;
c6884191 880 else
b5738413 881 dum->ep[0].ep.maxpacket = 64;
b5738413
SAS		 882}
883
18f2cbaa 884static int dummy_pullup(struct usb_gadget *_gadget, int value)
f1c39fad 885{
d8a14a85 886 struct dummy_hcd *dum_hcd;
f1c39fad
AS		 887 struct dummy *dum;
888 unsigned long flags;
889
b5738413
SAS		 890 dum = gadget_dev_to_dummy(&_gadget->dev);
891
892 if (value && dum->driver) {
893 if (mod_data.is_super_speed)
7177aed4 894 dum->gadget.speed = dum->driver->max_speed;
b5738413
SAS		 895 else if (mod_data.is_high_speed)
896 dum->gadget.speed = min_t(u8, USB_SPEED_HIGH,
7177aed4 897 dum->driver->max_speed);
b5738413
SAS		 898 else
899 dum->gadget.speed = USB_SPEED_FULL;
d262127c 900 dummy_udc_update_ep0(dum);
b5738413 901
7177aed4 902 if (dum->gadget.speed < dum->driver->max_speed)
b5738413 903 dev_dbg(udc_dev(dum), "This device can perform faster"
7177aed4
MN		 904 " if you connect it to a %s port...\n",
905 usb_speed_string(dum->driver->max_speed));
b5738413 906 }
d8a14a85 907 dum_hcd = gadget_to_dummy_hcd(_gadget);
d8a14a85 908
18f2cbaa 909 spin_lock_irqsave(&dum->lock, flags);
f1c39fad 910 dum->pullup = (value != 0);
d8a14a85 911 set_link_state(dum_hcd);
18f2cbaa 912 spin_unlock_irqrestore(&dum->lock, flags);
b5738413 913
d8a14a85 914 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
f1c39fad
AS		 915 return 0;
916}
917
aa074739
SAS		 918static int dummy_udc_start(struct usb_gadget *g,
919 struct usb_gadget_driver *driver);
22835b80 920static int dummy_udc_stop(struct usb_gadget *g);
0f91349b 921
1da177e4
LT		 922static const struct usb_gadget_ops dummy_ops = {
923 .get_frame = dummy_g_get_frame,
924 .wakeup = dummy_wakeup,
925 .set_selfpowered = dummy_set_selfpowered,
f1c39fad 926 .pullup = dummy_pullup,
aa074739
SAS		 927 .udc_start = dummy_udc_start,
928 .udc_stop = dummy_udc_stop,
1da177e4
LT		 929};
930
931/*-------------------------------------------------------------------------*/
932
933/* "function" sysfs attribute */
ce26bd23 934static ssize_t function_show(struct device *dev, struct device_attribute *attr,
18f2cbaa 935 char *buf)
1da177e4 936{
18f2cbaa 937 struct dummy *dum = gadget_dev_to_dummy(dev);
1da177e4
LT		 938
939 if (!dum->driver || !dum->driver->function)
940 return 0;
18f2cbaa 941 return scnprintf(buf, PAGE_SIZE, "%s\n", dum->driver->function);
1da177e4 942}
ce26bd23 943static DEVICE_ATTR_RO(function);
1da177e4
LT		 944
945/*-------------------------------------------------------------------------*/
946
947/*
948 * Driver registration/unregistration.
949 *
950 * This is basically hardware-specific; there's usually only one real USB
951 * device (not host) controller since that's how USB devices are intended
952 * to work. So most implementations of these api calls will rely on the
953 * fact that only one driver will ever bind to the hardware. But curious
954 * hardware can be built with discrete components, so the gadget API doesn't
955 * require that assumption.
956 *
957 * For this emulator, it might be convenient to create a usb slave device
958 * for each driver that registers: just add to a big root hub.
959 */
960
aa074739
SAS		 961static int dummy_udc_start(struct usb_gadget *g,
962 struct usb_gadget_driver *driver)
1da177e4 963{
aa074739
SAS		 964 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
965 struct dummy *dum = dum_hcd->dum;
1da177e4 966
7177aed4 967 if (driver->max_speed == USB_SPEED_UNKNOWN)
1da177e4
LT		 968 return -EINVAL;
969
970 /*
971 * SLAVE side init ... the layer above hardware, which
972 * can't enumerate without help from the driver we're binding.
973 */
5742b0c9 974
1da177e4 975 dum->devstatus = 0;
1da177e4 976 dum->driver = driver;
dd7e6dd5 977
1da177e4
LT		 978 return 0;
979}
1da177e4 980
22835b80 981static int dummy_udc_stop(struct usb_gadget *g)
1da177e4 982{
aa074739
SAS		 983 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
984 struct dummy *dum = dum_hcd->dum;
1da177e4 985
1da177e4 986 dum->driver = NULL;
25427874 987
1da177e4
LT		 988 return 0;
989}
1da177e4
LT		 990
991#undef is_enabled
992
d9b76251
AS		 993/* The gadget structure is stored inside the hcd structure and will be
994 * released along with it. */
0fb57599
SAS		 995static void init_dummy_udc_hw(struct dummy *dum)
996{
997 int i;
998
999 INIT_LIST_HEAD(&dum->gadget.ep_list);
1000 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
1001 struct dummy_ep *ep = &dum->ep[i];
1002
7a3b8e70 1003 if (!ep_info[i].name)
0fb57599 1004 break;
7a3b8e70
RB		 1005 ep->ep.name = ep_info[i].name;
1006 ep->ep.caps = ep_info[i].caps;
0fb57599
SAS		 1007 ep->ep.ops = &dummy_ep_ops;
1008 list_add_tail(&ep->ep.ep_list, &dum->gadget.ep_list);
1009 ep->halted = ep->wedged = ep->already_seen =
1010 ep->setup_stage = 0;
e117e742 1011 usb_ep_set_maxpacket_limit(&ep->ep, ~0);
c6884191 1012 ep->ep.max_streams = 16;
0fb57599
SAS		 1013 ep->last_io = jiffies;
1014 ep->gadget = &dum->gadget;
1015 ep->desc = NULL;
1016 INIT_LIST_HEAD(&ep->queue);
1017 }
1018
1019 dum->gadget.ep0 = &dum->ep[0].ep;
1020 list_del_init(&dum->ep[0].ep.ep_list);
1021 INIT_LIST_HEAD(&dum->fifo_req.queue);
f8744d40
SAS		 1022
1023#ifdef CONFIG_USB_OTG
1024 dum->gadget.is_otg = 1;
1025#endif
0fb57599
SAS		 1026}
1027
18f2cbaa 1028static int dummy_udc_probe(struct platform_device *pdev)
d9b76251 1029{
b100a2f3 1030 struct dummy *dum;
d9b76251
AS		 1031 int rc;
1032
b100a2f3 1033 dum = *((void **)dev_get_platdata(&pdev->dev));
d9b76251
AS		 1034 dum->gadget.name = gadget_name;
1035 dum->gadget.ops = &dummy_ops;
d327ab5b 1036 dum->gadget.max_speed = USB_SPEED_SUPER;
d9b76251 1037
8364d6b0 1038 dum->gadget.dev.parent = &pdev->dev;
0fb57599
SAS		 1039 init_dummy_udc_hw(dum);
1040
0f91349b
SAS		 1041 rc = usb_add_gadget_udc(&pdev->dev, &dum->gadget);
1042 if (rc < 0)
1043 goto err_udc;
1044
18f2cbaa 1045 rc = device_create_file(&dum->gadget.dev, &dev_attr_function);
efd54a36 1046 if (rc < 0)
0f91349b
SAS		 1047 goto err_dev;
1048 platform_set_drvdata(pdev, dum);
1049 return rc;
1050
1051err_dev:
1052 usb_del_gadget_udc(&dum->gadget);
1053err_udc:
d9b76251
AS		 1054 return rc;
1055}
1056
18f2cbaa 1057static int dummy_udc_remove(struct platform_device *pdev)
d9b76251 1058{
18f2cbaa 1059 struct dummy *dum = platform_get_drvdata(pdev);
d9b76251 1060
18f2cbaa 1061 device_remove_file(&dum->gadget.dev, &dev_attr_function);
5f5610f6 1062 usb_del_gadget_udc(&dum->gadget);
d9b76251
AS		 1063 return 0;
1064}
1065
fc0b721f
SAS		 1066static void dummy_udc_pm(struct dummy *dum, struct dummy_hcd *dum_hcd,
1067 int suspend)
391eca9d 1068{
fc0b721f
SAS		 1069 spin_lock_irq(&dum->lock);
1070 dum->udc_suspended = suspend;
d8a14a85 1071 set_link_state(dum_hcd);
fc0b721f
SAS		 1072 spin_unlock_irq(&dum->lock);
1073}
1074
1075static int dummy_udc_suspend(struct platform_device *pdev, pm_message_t state)
1076{
1077 struct dummy *dum = platform_get_drvdata(pdev);
1078 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
391eca9d 1079
fc0b721f
SAS		 1080 dev_dbg(&pdev->dev, "%s\n", __func__);
1081 dummy_udc_pm(dum, dum_hcd, 1);
d8a14a85 1082 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
391eca9d
AS		 1083 return 0;
1084}
1085
fc0b721f 1086static int dummy_udc_resume(struct platform_device *pdev)
391eca9d 1087{
fc0b721f
SAS		 1088 struct dummy *dum = platform_get_drvdata(pdev);
1089 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
391eca9d 1090
fc0b721f
SAS		 1091 dev_dbg(&pdev->dev, "%s\n", __func__);
1092 dummy_udc_pm(dum, dum_hcd, 0);
d8a14a85 1093 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
391eca9d
AS		 1094 return 0;
1095}
1096
3ae5eaec 1097static struct platform_driver dummy_udc_driver = {
d9b76251
AS		 1098 .probe = dummy_udc_probe,
1099 .remove = dummy_udc_remove,
391eca9d
AS		 1100 .suspend = dummy_udc_suspend,
1101 .resume = dummy_udc_resume,
3ae5eaec
RK		 1102 .driver = {
1103 .name = (char *) gadget_name,
3ae5eaec 1104 },
d9b76251
AS		 1105};
1106
1da177e4
LT		 1107/*-------------------------------------------------------------------------*/
1108
a54c979f
SAS		 1109static unsigned int dummy_get_ep_idx(const struct usb_endpoint_descriptor *desc)
1110{
1111 unsigned int index;
1112
1113 index = usb_endpoint_num(desc) << 1;
1114 if (usb_endpoint_dir_in(desc))
1115 index |= 1;
1116 return index;
1117}
1118
1da177e4
LT		 1119/* MASTER/HOST SIDE DRIVER
1120 *
1121 * this uses the hcd framework to hook up to host side drivers.
1122 * its root hub will only have one device, otherwise it acts like
1123 * a normal host controller.
1124 *
1125 * when urbs are queued, they're just stuck on a list that we
1126 * scan in a timer callback. that callback connects writes from
1127 * the host with reads from the device, and so on, based on the
1128 * usb 2.0 rules.
1129 */
1130
a54c979f
SAS		 1131static int dummy_ep_stream_en(struct dummy_hcd *dum_hcd, struct urb *urb)
1132{
1133 const struct usb_endpoint_descriptor *desc = &urb->ep->desc;
1134 u32 index;
1135
1136 if (!usb_endpoint_xfer_bulk(desc))
1137 return 0;
1138
1139 index = dummy_get_ep_idx(desc);
1140 return (1 << index) & dum_hcd->stream_en_ep;
1141}
1142
1143/*
1144 * The max stream number is saved as a nibble so for the 30 possible endpoints
1145 * we only 15 bytes of memory. Therefore we are limited to max 16 streams (0
1146 * means we use only 1 stream). The maximum according to the spec is 16bit so
1147 * if the 16 stream limit is about to go, the array size should be incremented
1148 * to 30 elements of type u16.
1149 */
1150static int get_max_streams_for_pipe(struct dummy_hcd *dum_hcd,
1151 unsigned int pipe)
1152{
1153 int max_streams;
1154
1155 max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)];
1156 if (usb_pipeout(pipe))
1157 max_streams >>= 4;
1158 else
1159 max_streams &= 0xf;
1160 max_streams++;
1161 return max_streams;
1162}
1163
1164static void set_max_streams_for_pipe(struct dummy_hcd *dum_hcd,
1165 unsigned int pipe, unsigned int streams)
1166{
1167 int max_streams;
1168
1169 streams--;
1170 max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)];
1171 if (usb_pipeout(pipe)) {
1172 streams <<= 4;
1173 max_streams &= 0xf;
1174 } else {
1175 max_streams &= 0xf0;
1176 }
1177 max_streams |= streams;
1178 dum_hcd->num_stream[usb_pipeendpoint(pipe)] = max_streams;
1179}
1180
1181static int dummy_validate_stream(struct dummy_hcd *dum_hcd, struct urb *urb)
1182{
1183 unsigned int max_streams;
1184 int enabled;
1185
1186 enabled = dummy_ep_stream_en(dum_hcd, urb);
1187 if (!urb->stream_id) {
1188 if (enabled)
1189 return -EINVAL;
1190 return 0;
1191 }
1192 if (!enabled)
1193 return -EINVAL;
1194
1195 max_streams = get_max_streams_for_pipe(dum_hcd,
1196 usb_pipeendpoint(urb->pipe));
1197 if (urb->stream_id > max_streams) {
1198 dev_err(dummy_dev(dum_hcd), "Stream id %d is out of range.\n",
1199 urb->stream_id);
1200 BUG();
1201 return -EINVAL;
1202 }
1203 return 0;
1204}
1205
18f2cbaa 1206static int dummy_urb_enqueue(
1da177e4 1207 struct usb_hcd *hcd,
1da177e4 1208 struct urb *urb,
55016f10 1209 gfp_t mem_flags
1da177e4 1210) {
cdfcbd2c 1211 struct dummy_hcd *dum_hcd;
1da177e4
LT		 1212 struct urbp *urbp;
1213 unsigned long flags;
e9df41c5 1214 int rc;
1da177e4 1215
18f2cbaa 1216 urbp = kmalloc(sizeof *urbp, mem_flags);
1da177e4
LT		 1217 if (!urbp)
1218 return -ENOMEM;
1219 urbp->urb = urb;
14fce33a 1220 urbp->miter_started = 0;
1da177e4 1221
cdfcbd2c
TB		 1222 dum_hcd = hcd_to_dummy_hcd(hcd);
1223 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
a54c979f
SAS		 1224
1225 rc = dummy_validate_stream(dum_hcd, urb);
1226 if (rc) {
1227 kfree(urbp);
1228 goto done;
1229 }
1230
e9df41c5
AS		 1231 rc = usb_hcd_link_urb_to_ep(hcd, urb);
1232 if (rc) {
1233 kfree(urbp);
1234 goto done;
1235 }
1da177e4 1236
cdfcbd2c
TB		 1237 if (!dum_hcd->udev) {
1238 dum_hcd->udev = urb->dev;
1239 usb_get_dev(dum_hcd->udev);
1240 } else if (unlikely(dum_hcd->udev != urb->dev))
1241 dev_err(dummy_dev(dum_hcd), "usb_device address has changed!\n");
1da177e4 1242
cdfcbd2c 1243 list_add_tail(&urbp->urbp_list, &dum_hcd->urbp_list);
1da177e4 1244 urb->hcpriv = urbp;
18f2cbaa 1245 if (usb_pipetype(urb->pipe) == PIPE_CONTROL)
1da177e4
LT		 1246 urb->error_count = 1; /* mark as a new urb */
1247
1248 /* kick the scheduler, it'll do the rest */
cdfcbd2c
TB		 1249 if (!timer_pending(&dum_hcd->timer))
1250 mod_timer(&dum_hcd->timer, jiffies + 1);
1da177e4 1251
e9df41c5 1252 done:
cdfcbd2c 1253 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
e9df41c5 1254 return rc;
1da177e4
LT		 1255}
1256
e9df41c5 1257static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1da177e4 1258{
cdfcbd2c 1259 struct dummy_hcd *dum_hcd;
391eca9d 1260 unsigned long flags;
e9df41c5 1261 int rc;
391eca9d
AS		 1262
1263 /* giveback happens automatically in timer callback,
1264 * so make sure the callback happens */
cdfcbd2c
TB		 1265 dum_hcd = hcd_to_dummy_hcd(hcd);
1266 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
e9df41c5
AS		 1267
1268 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
cdfcbd2c
TB		 1269 if (!rc && dum_hcd->rh_state != DUMMY_RH_RUNNING &&
1270 !list_empty(&dum_hcd->urbp_list))
1271 mod_timer(&dum_hcd->timer, jiffies);
e9df41c5 1272
cdfcbd2c 1273 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
e9df41c5 1274 return rc;
1da177e4
LT		 1275}
1276
a04ce20d
SAS		 1277static int dummy_perform_transfer(struct urb *urb, struct dummy_request *req,
1278 u32 len)
1279{
1280 void *ubuf, *rbuf;
14fce33a 1281 struct urbp *urbp = urb->hcpriv;
a04ce20d 1282 int to_host;
14fce33a
SAS		 1283 struct sg_mapping_iter *miter = &urbp->miter;
1284 u32 trans = 0;
1285 u32 this_sg;
1286 bool next_sg;
a04ce20d
SAS		 1287
1288 to_host = usb_pipein(urb->pipe);
1289 rbuf = req->req.buf + req->req.actual;
a04ce20d 1290
14fce33a
SAS		 1291 if (!urb->num_sgs) {
1292 ubuf = urb->transfer_buffer + urb->actual_length;
1293 if (to_host)
1294 memcpy(ubuf, rbuf, len);
1295 else
1296 memcpy(rbuf, ubuf, len);
1297 return len;
1298 }
1299
1300 if (!urbp->miter_started) {
1301 u32 flags = SG_MITER_ATOMIC;
1302
1303 if (to_host)
1304 flags |= SG_MITER_TO_SG;
1305 else
1306 flags |= SG_MITER_FROM_SG;
1307
1308 sg_miter_start(miter, urb->sg, urb->num_sgs, flags);
1309 urbp->miter_started = 1;
1310 }
1311 next_sg = sg_miter_next(miter);
1312 if (next_sg == false) {
1313 WARN_ON_ONCE(1);
1314 return -EINVAL;
1315 }
1316 do {
1317 ubuf = miter->addr;
1318 this_sg = min_t(u32, len, miter->length);
1319 miter->consumed = this_sg;
1320 trans += this_sg;
1321
1322 if (to_host)
1323 memcpy(ubuf, rbuf, this_sg);
1324 else
1325 memcpy(rbuf, ubuf, this_sg);
1326 len -= this_sg;
1327
1328 if (!len)
1329 break;
1330 next_sg = sg_miter_next(miter);
1331 if (next_sg == false) {
1332 WARN_ON_ONCE(1);
1333 return -EINVAL;
1334 }
1335
1336 rbuf += this_sg;
1337 } while (1);
1338
1339 sg_miter_stop(miter);
1340 return trans;
a04ce20d
SAS		 1341}
1342
1da177e4 1343/* transfer up to a frame's worth; caller must own lock */
a54c979f
SAS		 1344static int transfer(struct dummy_hcd *dum_hcd, struct urb *urb,
1345 struct dummy_ep *ep, int limit, int *status)
1da177e4 1346{
a54c979f 1347 struct dummy *dum = dum_hcd->dum;
1da177e4 1348 struct dummy_request *req;
9a9ce1df 1349 int sent = 0;
1da177e4
LT		 1350
1351top:
1352 /* if there's no request queued, the device is NAKing; return */
18f2cbaa 1353 list_for_each_entry(req, &ep->queue, queue) {
1da177e4
LT		 1354 unsigned host_len, dev_len, len;
1355 int is_short, to_host;
1356 int rescan = 0;
1357
a54c979f
SAS		 1358 if (dummy_ep_stream_en(dum_hcd, urb)) {
1359 if ((urb->stream_id != req->req.stream_id))
1360 continue;
1361 }
1362
1da177e4
LT		 1363 /* 1..N packets of ep->ep.maxpacket each ... the last one
1364 * may be short (including zero length).
1365 *
1366 * writer can send a zlp explicitly (length 0) or implicitly
1367 * (length mod maxpacket zero, and 'zero' flag); they always
1368 * terminate reads.
1369 */
1370 host_len = urb->transfer_buffer_length - urb->actual_length;
1371 dev_len = req->req.length - req->req.actual;
18f2cbaa 1372 len = min(host_len, dev_len);
1da177e4
LT		 1373
1374 /* FIXME update emulated data toggle too */
1375
18f2cbaa
SAS		 1376 to_host = usb_pipein(urb->pipe);
1377 if (unlikely(len == 0))
1da177e4
LT		 1378 is_short = 1;
1379 else {
1da177e4
LT		 1380 /* not enough bandwidth left? */
1381 if (limit < ep->ep.maxpacket && limit < len)
1382 break;
18f2cbaa 1383 len = min_t(unsigned, len, limit);
1da177e4
LT		 1384 if (len == 0)
1385 break;
1386
e42bd6a5
IK		 1387 /* send multiple of maxpacket first, then remainder */
1388 if (len >= ep->ep.maxpacket) {
1389 is_short = 0;
1390 if (len % ep->ep.maxpacket)
1391 rescan = 1;
1392 len -= len % ep->ep.maxpacket;
1393 } else {
1394 is_short = 1;
1da177e4 1395 }
1da177e4 1396
a04ce20d
SAS		 1397 len = dummy_perform_transfer(urb, req, len);
1398
1da177e4 1399 ep->last_io = jiffies;
b1443ac0 1400 if ((int)len < 0) {
14fce33a
SAS		 1401 req->req.status = len;
1402 } else {
1403 limit -= len;
9a9ce1df 1404 sent += len;
14fce33a
SAS		 1405 urb->actual_length += len;
1406 req->req.actual += len;
1407 }
1da177e4
LT		 1408 }
1409
1410 /* short packets terminate, maybe with overflow/underflow.
1411 * it's only really an error to write too much.
1412 *
1413 * partially filling a buffer optionally blocks queue advances
1414 * (so completion handlers can clean up the queue) but we don't
b0d9efba 1415 * need to emulate such data-in-flight.
1da177e4
LT		 1416 */
1417 if (is_short) {
1418 if (host_len == dev_len) {
1419 req->req.status = 0;
4d2f110c 1420 *status = 0;
1da177e4
LT		 1421 } else if (to_host) {
1422 req->req.status = 0;
1423 if (dev_len > host_len)
4d2f110c 1424 *status = -EOVERFLOW;
1da177e4 1425 else
4d2f110c 1426 *status = 0;
5dda5be9 1427 } else {
4d2f110c 1428 *status = 0;
1da177e4
LT		 1429 if (host_len > dev_len)
1430 req->req.status = -EOVERFLOW;
1431 else
1432 req->req.status = 0;
1433 }
1434
21c3ee93
IK		 1435 /*
1436 * many requests terminate without a short packet.
1437 * send a zlp if demanded by flags.
1438 */
1da177e4 1439 } else {
21c3ee93
IK		 1440 if (req->req.length == req->req.actual) {
1441 if (req->req.zero && to_host)
1442 rescan = 1;
1443 else
1444 req->req.status = 0;
1445 }
1446 if (urb->transfer_buffer_length == urb->actual_length) {
1447 if (urb->transfer_flags & URB_ZERO_PACKET &&
1448 !to_host)
1449 rescan = 1;
1450 else
1451 *status = 0;
1452 }
1da177e4
LT		 1453 }
1454
1455 /* device side completion --> continuable */
1456 if (req->req.status != -EINPROGRESS) {
18f2cbaa 1457 list_del_init(&req->queue);
1da177e4 1458
18f2cbaa 1459 spin_unlock(&dum->lock);
304f7e5e 1460 usb_gadget_giveback_request(&ep->ep, &req->req);
18f2cbaa 1461 spin_lock(&dum->lock);
1da177e4
LT		 1462
1463 /* requests might have been unlinked... */
1464 rescan = 1;
1465 }
1466
1467 /* host side completion --> terminate */
4d2f110c 1468 if (*status != -EINPROGRESS)
1da177e4
LT		 1469 break;
1470
1471 /* rescan to continue with any other queued i/o */
1472 if (rescan)
1473 goto top;
1474 }
9a9ce1df 1475 return sent;
1da177e4
LT		 1476}
1477
18f2cbaa 1478static int periodic_bytes(struct dummy *dum, struct dummy_ep *ep)
1da177e4
LT		 1479{
1480 int limit = ep->ep.maxpacket;
1481
1482 if (dum->gadget.speed == USB_SPEED_HIGH) {
1483 int tmp;
1484
1485 /* high bandwidth mode */
29cc8897 1486 tmp = usb_endpoint_maxp(ep->desc);
1da177e4
LT		 1487 tmp = (tmp >> 11) & 0x03;
1488 tmp *= 8 /* applies to entire frame */;
1489 limit += limit * tmp;
1490 }
1cd8fd28 1491 if (dum->gadget.speed == USB_SPEED_SUPER) {
59f08e6d 1492 switch (usb_endpoint_type(ep->desc)) {
1cd8fd28
TB		 1493 case USB_ENDPOINT_XFER_ISOC:
1494 /* Sec. 4.4.8.2 USB3.0 Spec */
1495 limit = 3 * 16 * 1024 * 8;
1496 break;
1497 case USB_ENDPOINT_XFER_INT:
1498 /* Sec. 4.4.7.2 USB3.0 Spec */
1499 limit = 3 * 1024 * 8;
1500 break;
1501 case USB_ENDPOINT_XFER_BULK:
1502 default:
1503 break;
1504 }
1505 }
1da177e4
LT		 1506 return limit;
1507}
1508
cdfcbd2c 1509#define is_active(dum_hcd) ((dum_hcd->port_status & \
1da177e4
LT		 1510 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1511 USB_PORT_STAT_SUSPEND)) \
1512 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1513
18f2cbaa 1514static struct dummy_ep *find_endpoint(struct dummy *dum, u8 address)
1da177e4
LT		 1515{
1516 int i;
1517
1cd8fd28
TB		 1518 if (!is_active((dum->gadget.speed == USB_SPEED_SUPER ?
1519 dum->ss_hcd : dum->hs_hcd)))
1da177e4
LT		 1520 return NULL;
1521 if ((address & ~USB_DIR_IN) == 0)
18f2cbaa 1522 return &dum->ep[0];
1da177e4 1523 for (i = 1; i < DUMMY_ENDPOINTS; i++) {
18f2cbaa 1524 struct dummy_ep *ep = &dum->ep[i];
1da177e4
LT		 1525
1526 if (!ep->desc)
1527 continue;
1528 if (ep->desc->bEndpointAddress == address)
1529 return ep;
1530 }
1531 return NULL;
1532}
1533
1534#undef is_active
1535
1536#define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1537#define Dev_InRequest (Dev_Request | USB_DIR_IN)
1538#define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1539#define Intf_InRequest (Intf_Request | USB_DIR_IN)
1540#define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1541#define Ep_InRequest (Ep_Request | USB_DIR_IN)
1542
8be8a9d3
TB		 1543
1544/**
1545 * handle_control_request() - handles all control transfers
1546 * @dum: pointer to dummy (the_controller)
1547 * @urb: the urb request to handle
1548 * @setup: pointer to the setup data for a USB device control
1549 * request
1550 * @status: pointer to request handling status
1551 *
1552 * Return 0 - if the request was handled
1553 * 1 - if the request wasn't handles
1554 * error code on error
1555 */
cdfcbd2c 1556static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb,
8be8a9d3
TB		 1557 struct usb_ctrlrequest *setup,
1558 int *status)
1559{
1560 struct dummy_ep *ep2;
cdfcbd2c 1561 struct dummy *dum = dum_hcd->dum;
8be8a9d3
TB		 1562 int ret_val = 1;
1563 unsigned w_index;
1564 unsigned w_value;
1565
1566 w_index = le16_to_cpu(setup->wIndex);
1567 w_value = le16_to_cpu(setup->wValue);
1568 switch (setup->bRequest) {
1569 case USB_REQ_SET_ADDRESS:
1570 if (setup->bRequestType != Dev_Request)
1571 break;
1572 dum->address = w_value;
1573 *status = 0;
1574 dev_dbg(udc_dev(dum), "set_address = %d\n",
1575 w_value);
1576 ret_val = 0;
1577 break;
1578 case USB_REQ_SET_FEATURE:
1579 if (setup->bRequestType == Dev_Request) {
1580 ret_val = 0;
1581 switch (w_value) {
1582 case USB_DEVICE_REMOTE_WAKEUP:
1583 break;
1584 case USB_DEVICE_B_HNP_ENABLE:
1585 dum->gadget.b_hnp_enable = 1;
1586 break;
1587 case USB_DEVICE_A_HNP_SUPPORT:
1588 dum->gadget.a_hnp_support = 1;
1589 break;
1590 case USB_DEVICE_A_ALT_HNP_SUPPORT:
1591 dum->gadget.a_alt_hnp_support = 1;
1592 break;
1cd8fd28
TB		 1593 case USB_DEVICE_U1_ENABLE:
1594 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1595 HCD_USB3)
1596 w_value = USB_DEV_STAT_U1_ENABLED;
1597 else
1598 ret_val = -EOPNOTSUPP;
1599 break;
1600 case USB_DEVICE_U2_ENABLE:
1601 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1602 HCD_USB3)
1603 w_value = USB_DEV_STAT_U2_ENABLED;
1604 else
1605 ret_val = -EOPNOTSUPP;
1606 break;
1607 case USB_DEVICE_LTM_ENABLE:
1608 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1609 HCD_USB3)
1610 w_value = USB_DEV_STAT_LTM_ENABLED;
1611 else
1612 ret_val = -EOPNOTSUPP;
1613 break;
8be8a9d3
TB		 1614 default:
1615 ret_val = -EOPNOTSUPP;
1616 }
1617 if (ret_val == 0) {
1618 dum->devstatus |= (1 << w_value);
1619 *status = 0;
1620 }
1621 } else if (setup->bRequestType == Ep_Request) {
1622 /* endpoint halt */
1623 ep2 = find_endpoint(dum, w_index);
1624 if (!ep2 || ep2->ep.name == ep0name) {
1625 ret_val = -EOPNOTSUPP;
1626 break;
1627 }
1628 ep2->halted = 1;
1629 ret_val = 0;
1630 *status = 0;
1631 }
1632 break;
1633 case USB_REQ_CLEAR_FEATURE:
1634 if (setup->bRequestType == Dev_Request) {
1635 ret_val = 0;
1636 switch (w_value) {
1637 case USB_DEVICE_REMOTE_WAKEUP:
1638 w_value = USB_DEVICE_REMOTE_WAKEUP;
1639 break;
1cd8fd28
TB		 1640 case USB_DEVICE_U1_ENABLE:
1641 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1642 HCD_USB3)
1643 w_value = USB_DEV_STAT_U1_ENABLED;
1644 else
1645 ret_val = -EOPNOTSUPP;
1646 break;
1647 case USB_DEVICE_U2_ENABLE:
1648 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1649 HCD_USB3)
1650 w_value = USB_DEV_STAT_U2_ENABLED;
1651 else
1652 ret_val = -EOPNOTSUPP;
1653 break;
1654 case USB_DEVICE_LTM_ENABLE:
1655 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1656 HCD_USB3)
1657 w_value = USB_DEV_STAT_LTM_ENABLED;
1658 else
1659 ret_val = -EOPNOTSUPP;
1660 break;
8be8a9d3
TB		 1661 default:
1662 ret_val = -EOPNOTSUPP;
1663 break;
1664 }
1665 if (ret_val == 0) {
1666 dum->devstatus &= ~(1 << w_value);
1667 *status = 0;
1668 }
1669 } else if (setup->bRequestType == Ep_Request) {
1670 /* endpoint halt */
1671 ep2 = find_endpoint(dum, w_index);
1672 if (!ep2) {
1673 ret_val = -EOPNOTSUPP;
1674 break;
1675 }
1676 if (!ep2->wedged)
1677 ep2->halted = 0;
1678 ret_val = 0;
1679 *status = 0;
1680 }
1681 break;
1682 case USB_REQ_GET_STATUS:
1683 if (setup->bRequestType == Dev_InRequest
1684 || setup->bRequestType == Intf_InRequest
1685 || setup->bRequestType == Ep_InRequest) {
1686 char *buf;
1687 /*
1688 * device: remote wakeup, selfpowered
1689 * interface: nothing
1690 * endpoint: halt
1691 */
1692 buf = (char *)urb->transfer_buffer;
1693 if (urb->transfer_buffer_length > 0) {
1694 if (setup->bRequestType == Ep_InRequest) {
1695 ep2 = find_endpoint(dum, w_index);
1696 if (!ep2) {
1697 ret_val = -EOPNOTSUPP;
1698 break;
1699 }
1700 buf[0] = ep2->halted;
1701 } else if (setup->bRequestType ==
1702 Dev_InRequest) {
1703 buf[0] = (u8)dum->devstatus;
1704 } else
1705 buf[0] = 0;
1706 }
1707 if (urb->transfer_buffer_length > 1)
1708 buf[1] = 0;
1709 urb->actual_length = min_t(u32, 2,
1710 urb->transfer_buffer_length);
1711 ret_val = 0;
1712 *status = 0;
1713 }
1714 break;
1715 }
1716 return ret_val;
1717}
1718
1da177e4
LT		 1719/* drive both sides of the transfers; looks like irq handlers to
1720 * both drivers except the callbacks aren't in_irq().
1721 */
cdfcbd2c 1722static void dummy_timer(unsigned long _dum_hcd)
1da177e4 1723{
cdfcbd2c
TB		 1724 struct dummy_hcd *dum_hcd = (struct dummy_hcd *) _dum_hcd;
1725 struct dummy *dum = dum_hcd->dum;
1da177e4
LT		 1726 struct urbp *urbp, *tmp;
1727 unsigned long flags;
1728 int limit, total;
1729 int i;
1730
1731 /* simplistic model for one frame's bandwidth */
1732 switch (dum->gadget.speed) {
1733 case USB_SPEED_LOW:
1734 total = 8/*bytes*/ * 12/*packets*/;
1735 break;
1736 case USB_SPEED_FULL:
1737 total = 64/*bytes*/ * 19/*packets*/;
1738 break;
1739 case USB_SPEED_HIGH:
1740 total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1741 break;
1cd8fd28
TB		 1742 case USB_SPEED_SUPER:
1743 /* Bus speed is 500000 bytes/ms, so use a little less */
1744 total = 490000;
1745 break;
1da177e4 1746 default:
cdfcbd2c 1747 dev_err(dummy_dev(dum_hcd), "bogus device speed\n");
1da177e4
LT		 1748 return;
1749 }
1750
1751 /* FIXME if HZ != 1000 this will probably misbehave ... */
1752
1753 /* look at each urb queued by the host side driver */
18f2cbaa 1754 spin_lock_irqsave(&dum->lock, flags);
1da177e4 1755
cdfcbd2c
TB		 1756 if (!dum_hcd->udev) {
1757 dev_err(dummy_dev(dum_hcd),
1da177e4 1758 "timer fired with no URBs pending?\n");
18f2cbaa 1759 spin_unlock_irqrestore(&dum->lock, flags);
1da177e4
LT		 1760 return;
1761 }
1762
1763 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
7a3b8e70 1764 if (!ep_info[i].name)
1da177e4 1765 break;
18f2cbaa 1766 dum->ep[i].already_seen = 0;
1da177e4
LT		 1767 }
1768
1769restart:
cdfcbd2c 1770 list_for_each_entry_safe(urbp, tmp, &dum_hcd->urbp_list, urbp_list) {
1da177e4
LT		 1771 struct urb *urb;
1772 struct dummy_request *req;
1773 u8 address;
1774 struct dummy_ep *ep = NULL;
1775 int type;
4d2f110c 1776 int status = -EINPROGRESS;
1da177e4
LT		 1777
1778 urb = urbp->urb;
eb231054 1779 if (urb->unlinked)
1da177e4 1780 goto return_urb;
cdfcbd2c 1781 else if (dum_hcd->rh_state != DUMMY_RH_RUNNING)
391eca9d 1782 continue;
18f2cbaa 1783 type = usb_pipetype(urb->pipe);
1da177e4
LT		 1784
1785 /* used up this frame's non-periodic bandwidth?
1786 * FIXME there's infinite bandwidth for control and
1787 * periodic transfers ... unrealistic.
1788 */
1789 if (total <= 0 && type == PIPE_BULK)
1790 continue;
1791
1792 /* find the gadget's ep for this request (if configured) */
1793 address = usb_pipeendpoint (urb->pipe);
18f2cbaa 1794 if (usb_pipein(urb->pipe))
1da177e4
LT		 1795 address |= USB_DIR_IN;
1796 ep = find_endpoint(dum, address);
1797 if (!ep) {
1798 /* set_configuration() disagreement */
cdfcbd2c 1799 dev_dbg(dummy_dev(dum_hcd),
1da177e4
LT		 1800 "no ep configured for urb %p\n",
1801 urb);
4d2f110c 1802 status = -EPROTO;
1da177e4
LT		 1803 goto return_urb;
1804 }
1805
1806 if (ep->already_seen)
1807 continue;
1808 ep->already_seen = 1;
18f2cbaa 1809 if (ep == &dum->ep[0] && urb->error_count) {
1da177e4
LT		 1810 ep->setup_stage = 1; /* a new urb */
1811 urb->error_count = 0;
1812 }
1813 if (ep->halted && !ep->setup_stage) {
1814 /* NOTE: must not be iso! */
cdfcbd2c 1815 dev_dbg(dummy_dev(dum_hcd), "ep %s halted, urb %p\n",
1da177e4 1816 ep->ep.name, urb);
4d2f110c 1817 status = -EPIPE;
1da177e4
LT		 1818 goto return_urb;
1819 }
1820 /* FIXME make sure both ends agree on maxpacket */
1821
1822 /* handle control requests */
18f2cbaa 1823 if (ep == &dum->ep[0] && ep->setup_stage) {
1da177e4
LT		 1824 struct usb_ctrlrequest setup;
1825 int value = 1;
1da177e4 1826
18f2cbaa 1827 setup = *(struct usb_ctrlrequest *) urb->setup_packet;
1da177e4 1828 /* paranoia, in case of stale queued data */
18f2cbaa
SAS		 1829 list_for_each_entry(req, &ep->queue, queue) {
1830 list_del_init(&req->queue);
1da177e4 1831 req->req.status = -EOVERFLOW;
18f2cbaa 1832 dev_dbg(udc_dev(dum), "stale req = %p\n",
1da177e4
LT		 1833 req);
1834
18f2cbaa 1835 spin_unlock(&dum->lock);
304f7e5e 1836 usb_gadget_giveback_request(&ep->ep, &req->req);
18f2cbaa 1837 spin_lock(&dum->lock);
1da177e4
LT		 1838 ep->already_seen = 0;
1839 goto restart;
1840 }
1841
1842 /* gadget driver never sees set_address or operations
1843 * on standard feature flags. some hardware doesn't
1844 * even expose them.
1845 */
1846 ep->last_io = jiffies;
1847 ep->setup_stage = 0;
1848 ep->halted = 0;
1da177e4 1849
cdfcbd2c 1850 value = handle_control_request(dum_hcd, urb, &setup,
8be8a9d3 1851 &status);
1da177e4
LT		 1852
1853 /* gadget driver handles all other requests. block
1854 * until setup() returns; no reentrancy issues etc.
1855 */
1856 if (value > 0) {
18f2cbaa
SAS		 1857 spin_unlock(&dum->lock);
1858 value = dum->driver->setup(&dum->gadget,
1da177e4 1859 &setup);
18f2cbaa 1860 spin_lock(&dum->lock);
1da177e4
LT		 1861
1862 if (value >= 0) {
1863 /* no delays (max 64KB data stage) */
1864 limit = 64*1024;
1865 goto treat_control_like_bulk;
1866 }
1867 /* error, see below */
1868 }
1869
1870 if (value < 0) {
1871 if (value != -EOPNOTSUPP)
18f2cbaa 1872 dev_dbg(udc_dev(dum),
1da177e4
LT		 1873 "setup --> %d\n",
1874 value);
4d2f110c 1875 status = -EPIPE;
1da177e4
LT		 1876 urb->actual_length = 0;
1877 }
1878
1879 goto return_urb;
1880 }
1881
1882 /* non-control requests */
1883 limit = total;
18f2cbaa 1884 switch (usb_pipetype(urb->pipe)) {
1da177e4
LT		 1885 case PIPE_ISOCHRONOUS:
1886 /* FIXME is it urb->interval since the last xfer?
1887 * use urb->iso_frame_desc[i].
1888 * complete whether or not ep has requests queued.
1889 * report random errors, to debug drivers.
1890 */
18f2cbaa 1891 limit = max(limit, periodic_bytes(dum, ep));
4d2f110c 1892 status = -ENOSYS;
1da177e4
LT		 1893 break;
1894
1895 case PIPE_INTERRUPT:
1896 /* FIXME is it urb->interval since the last xfer?
1897 * this almost certainly polls too fast.
1898 */
18f2cbaa 1899 limit = max(limit, periodic_bytes(dum, ep));
1da177e4
LT		 1900 /* FALLTHROUGH */
1901
1da177e4 1902 default:
18f2cbaa 1903treat_control_like_bulk:
1da177e4 1904 ep->last_io = jiffies;
9a9ce1df 1905 total -= transfer(dum_hcd, urb, ep, limit, &status);
1da177e4
LT		 1906 break;
1907 }
1908
1909 /* incomplete transfer? */
4d2f110c 1910 if (status == -EINPROGRESS)
1da177e4
LT		 1911 continue;
1912
1913return_urb:
18f2cbaa
SAS		 1914 list_del(&urbp->urbp_list);
1915 kfree(urbp);
1da177e4
LT		 1916 if (ep)
1917 ep->already_seen = ep->setup_stage = 0;
1918
cdfcbd2c 1919 usb_hcd_unlink_urb_from_ep(dummy_hcd_to_hcd(dum_hcd), urb);
18f2cbaa 1920 spin_unlock(&dum->lock);
cdfcbd2c 1921 usb_hcd_giveback_urb(dummy_hcd_to_hcd(dum_hcd), urb, status);
18f2cbaa 1922 spin_lock(&dum->lock);
1da177e4
LT		 1923
1924 goto restart;
1925 }
1926
cdfcbd2c
TB		 1927 if (list_empty(&dum_hcd->urbp_list)) {
1928 usb_put_dev(dum_hcd->udev);
1929 dum_hcd->udev = NULL;
1930 } else if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
391eca9d 1931 /* want a 1 msec delay here */
cdfcbd2c 1932 mod_timer(&dum_hcd->timer, jiffies + msecs_to_jiffies(1));
1da177e4
LT		 1933 }
1934
18f2cbaa 1935 spin_unlock_irqrestore(&dum->lock, flags);
1da177e4
LT		 1936}
1937
1938/*-------------------------------------------------------------------------*/
1939
1940#define PORT_C_MASK \
c2db8b5e
AS		 1941 ((USB_PORT_STAT_C_CONNECTION \
1942 | USB_PORT_STAT_C_ENABLE \
1943 | USB_PORT_STAT_C_SUSPEND \
1944 | USB_PORT_STAT_C_OVERCURRENT \
1945 | USB_PORT_STAT_C_RESET) << 16)
1da177e4 1946
18f2cbaa 1947static int dummy_hub_status(struct usb_hcd *hcd, char *buf)
1da177e4 1948{
cdfcbd2c 1949 struct dummy_hcd *dum_hcd;
1da177e4 1950 unsigned long flags;
391eca9d 1951 int retval = 0;
1da177e4 1952
cdfcbd2c 1953 dum_hcd = hcd_to_dummy_hcd(hcd);
1da177e4 1954
cdfcbd2c 1955 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
541c7d43 1956 if (!HCD_HW_ACCESSIBLE(hcd))
391eca9d 1957 goto done;
f1c39fad 1958
cdfcbd2c
TB		 1959 if (dum_hcd->resuming && time_after_eq(jiffies, dum_hcd->re_timeout)) {
1960 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1961 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
1962 set_link_state(dum_hcd);
f1c39fad
AS		 1963 }
1964
cdfcbd2c 1965 if ((dum_hcd->port_status & PORT_C_MASK) != 0) {
1da177e4 1966 *buf = (1 << 1);
cdfcbd2c
TB		 1967 dev_dbg(dummy_dev(dum_hcd), "port status 0x%08x has changes\n",
1968 dum_hcd->port_status);
1da177e4 1969 retval = 1;
cdfcbd2c 1970 if (dum_hcd->rh_state == DUMMY_RH_SUSPENDED)
18f2cbaa 1971 usb_hcd_resume_root_hub(hcd);
1da177e4 1972 }
391eca9d 1973done:
cdfcbd2c 1974 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1da177e4
LT		 1975 return retval;
1976}
1977
3b9c1c5b 1978/* usb 3.0 root hub device descriptor */
814cf212 1979static struct {
3b9c1c5b
SAS		 1980 struct usb_bos_descriptor bos;
1981 struct usb_ss_cap_descriptor ss_cap;
1982} __packed usb3_bos_desc = {
1983
1984 .bos = {
1985 .bLength = USB_DT_BOS_SIZE,
1986 .bDescriptorType = USB_DT_BOS,
1987 .wTotalLength = cpu_to_le16(sizeof(usb3_bos_desc)),
1988 .bNumDeviceCaps = 1,
1989 },
1990 .ss_cap = {
1991 .bLength = USB_DT_USB_SS_CAP_SIZE,
1992 .bDescriptorType = USB_DT_DEVICE_CAPABILITY,
1993 .bDevCapabilityType = USB_SS_CAP_TYPE,
1994 .wSpeedSupported = cpu_to_le16(USB_5GBPS_OPERATION),
1995 .bFunctionalitySupport = ilog2(USB_5GBPS_OPERATION),
1996 },
1997};
1998
1cd8fd28
TB		 1999static inline void
2000ss_hub_descriptor(struct usb_hub_descriptor *desc)
2001{
2002 memset(desc, 0, sizeof *desc);
2569ffd5 2003 desc->bDescriptorType = USB_DT_SS_HUB;
1cd8fd28 2004 desc->bDescLength = 12;
d906d61c
SS		 2005 desc->wHubCharacteristics = cpu_to_le16(
2006 HUB_CHAR_INDV_PORT_LPSM |
2007 HUB_CHAR_COMMON_OCPM);
1cd8fd28
TB		 2008 desc->bNbrPorts = 1;
2009 desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/
2010 desc->u.ss.DeviceRemovable = 0xffff;
2011}
2012
18f2cbaa 2013static inline void hub_descriptor(struct usb_hub_descriptor *desc)
1da177e4 2014{
18f2cbaa 2015 memset(desc, 0, sizeof *desc);
2569ffd5 2016 desc->bDescriptorType = USB_DT_HUB;
1da177e4 2017 desc->bDescLength = 9;
d906d61c
SS		 2018 desc->wHubCharacteristics = cpu_to_le16(
2019 HUB_CHAR_INDV_PORT_LPSM |
2020 HUB_CHAR_COMMON_OCPM);
1da177e4 2021 desc->bNbrPorts = 1;
dbe79bbe
JY		 2022 desc->u.hs.DeviceRemovable[0] = 0xff;
2023 desc->u.hs.DeviceRemovable[1] = 0xff;
1da177e4
LT		 2024}
2025
18f2cbaa 2026static int dummy_hub_control(
1da177e4
LT		 2027 struct usb_hcd *hcd,
2028 u16 typeReq,
2029 u16 wValue,
2030 u16 wIndex,
2031 char *buf,
2032 u16 wLength
2033) {
cdfcbd2c 2034 struct dummy_hcd *dum_hcd;
1da177e4
LT		 2035 int retval = 0;
2036 unsigned long flags;
2037
541c7d43 2038 if (!HCD_HW_ACCESSIBLE(hcd))
391eca9d
AS		 2039 return -ETIMEDOUT;
2040
cdfcbd2c
TB		 2041 dum_hcd = hcd_to_dummy_hcd(hcd);
2042
2043 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1da177e4
LT		 2044 switch (typeReq) {
2045 case ClearHubFeature:
2046 break;
2047 case ClearPortFeature:
2048 switch (wValue) {
2049 case USB_PORT_FEAT_SUSPEND:
1cd8fd28
TB		 2050 if (hcd->speed == HCD_USB3) {
2051 dev_dbg(dummy_dev(dum_hcd),
2052 "USB_PORT_FEAT_SUSPEND req not "
2053 "supported for USB 3.0 roothub\n");
2054 goto error;
2055 }
cdfcbd2c 2056 if (dum_hcd->port_status & USB_PORT_STAT_SUSPEND) {
1da177e4 2057 /* 20msec resume signaling */
cdfcbd2c
TB		 2058 dum_hcd->resuming = 1;
2059 dum_hcd->re_timeout = jiffies +
f1c39fad 2060 msecs_to_jiffies(20);
1da177e4
LT		 2061 }
2062 break;
2063 case USB_PORT_FEAT_POWER:
1cd8fd28
TB		 2064 if (hcd->speed == HCD_USB3) {
2065 if (dum_hcd->port_status & USB_PORT_STAT_POWER)
2066 dev_dbg(dummy_dev(dum_hcd),
2067 "power-off\n");
2068 } else
2069 if (dum_hcd->port_status &
2070 USB_SS_PORT_STAT_POWER)
2071 dev_dbg(dummy_dev(dum_hcd),
2072 "power-off\n");
f1c39fad 2073 /* FALLS THROUGH */
1da177e4 2074 default:
cdfcbd2c
TB		 2075 dum_hcd->port_status &= ~(1 << wValue);
2076 set_link_state(dum_hcd);
1da177e4
LT		 2077 }
2078 break;
2079 case GetHubDescriptor:
1cd8fd28
TB		 2080 if (hcd->speed == HCD_USB3 &&
2081 (wLength < USB_DT_SS_HUB_SIZE ||
2082 wValue != (USB_DT_SS_HUB << 8))) {
2083 dev_dbg(dummy_dev(dum_hcd),
2084 "Wrong hub descriptor type for "
2085 "USB 3.0 roothub.\n");
2086 goto error;
2087 }
2088 if (hcd->speed == HCD_USB3)
2089 ss_hub_descriptor((struct usb_hub_descriptor *) buf);
2090 else
2091 hub_descriptor((struct usb_hub_descriptor *) buf);
1da177e4 2092 break;
3b9c1c5b
SAS		 2093
2094 case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
2095 if (hcd->speed != HCD_USB3)
2096 goto error;
2097
2098 if ((wValue >> 8) != USB_DT_BOS)
2099 goto error;
2100
2101 memcpy(buf, &usb3_bos_desc, sizeof(usb3_bos_desc));
2102 retval = sizeof(usb3_bos_desc);
2103 break;
2104
1da177e4 2105 case GetHubStatus:
18f2cbaa 2106 *(__le32 *) buf = cpu_to_le32(0);
1da177e4
LT		 2107 break;
2108 case GetPortStatus:
2109 if (wIndex != 1)
2110 retval = -EPIPE;
2111
2112 /* whoever resets or resumes must GetPortStatus to
2113 * complete it!!
2114 */
cdfcbd2c
TB		 2115 if (dum_hcd->resuming &&
2116 time_after_eq(jiffies, dum_hcd->re_timeout)) {
2117 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
2118 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
1da177e4 2119 }
cdfcbd2c
TB		 2120 if ((dum_hcd->port_status & USB_PORT_STAT_RESET) != 0 &&
2121 time_after_eq(jiffies, dum_hcd->re_timeout)) {
2122 dum_hcd->port_status |= (USB_PORT_STAT_C_RESET << 16);
2123 dum_hcd->port_status &= ~USB_PORT_STAT_RESET;
2124 if (dum_hcd->dum->pullup) {
2125 dum_hcd->port_status |= USB_PORT_STAT_ENABLE;
1cd8fd28
TB		 2126
2127 if (hcd->speed < HCD_USB3) {
2128 switch (dum_hcd->dum->gadget.speed) {
2129 case USB_SPEED_HIGH:
2130 dum_hcd->port_status |=
2131 USB_PORT_STAT_HIGH_SPEED;
2132 break;
2133 case USB_SPEED_LOW:
2134 dum_hcd->dum->gadget.ep0->
2135 maxpacket = 8;
2136 dum_hcd->port_status |=
2137 USB_PORT_STAT_LOW_SPEED;
2138 break;
2139 default:
2140 dum_hcd->dum->gadget.speed =
2141 USB_SPEED_FULL;
2142 break;
2143 }
1da177e4
LT		 2144 }
2145 }
2146 }
cdfcbd2c 2147 set_link_state(dum_hcd);
18f2cbaa
SAS		 2148 ((__le16 *) buf)[0] = cpu_to_le16(dum_hcd->port_status);
2149 ((__le16 *) buf)[1] = cpu_to_le16(dum_hcd->port_status >> 16);
1da177e4
LT		 2150 break;
2151 case SetHubFeature:
2152 retval = -EPIPE;
2153 break;
2154 case SetPortFeature:
2155 switch (wValue) {
1cd8fd28
TB		 2156 case USB_PORT_FEAT_LINK_STATE:
2157 if (hcd->speed != HCD_USB3) {
2158 dev_dbg(dummy_dev(dum_hcd),
2159 "USB_PORT_FEAT_LINK_STATE req not "
2160 "supported for USB 2.0 roothub\n");
2161 goto error;
2162 }
2163 /*
2164 * Since this is dummy we don't have an actual link so
2165 * there is nothing to do for the SET_LINK_STATE cmd
2166 */
2167 break;
2168 case USB_PORT_FEAT_U1_TIMEOUT:
2169 case USB_PORT_FEAT_U2_TIMEOUT:
2170 /* TODO: add suspend/resume support! */
2171 if (hcd->speed != HCD_USB3) {
2172 dev_dbg(dummy_dev(dum_hcd),
2173 "USB_PORT_FEAT_U1/2_TIMEOUT req not "
2174 "supported for USB 2.0 roothub\n");
2175 goto error;
2176 }
2177 break;
1da177e4 2178 case USB_PORT_FEAT_SUSPEND:
1cd8fd28
TB		 2179 /* Applicable only for USB2.0 hub */
2180 if (hcd->speed == HCD_USB3) {
2181 dev_dbg(dummy_dev(dum_hcd),
2182 "USB_PORT_FEAT_SUSPEND req not "
2183 "supported for USB 3.0 roothub\n");
2184 goto error;
2185 }
cdfcbd2c
TB		 2186 if (dum_hcd->active) {
2187 dum_hcd->port_status |= USB_PORT_STAT_SUSPEND;
f1c39fad
AS		 2188
2189 /* HNP would happen here; for now we
2190 * assume b_bus_req is always true.
2191 */
cdfcbd2c 2192 set_link_state(dum_hcd);
f1c39fad 2193 if (((1 << USB_DEVICE_B_HNP_ENABLE)
cdfcbd2c
TB		 2194 & dum_hcd->dum->devstatus) != 0)
2195 dev_dbg(dummy_dev(dum_hcd),
5742b0c9 2196 "no HNP yet!\n");
1da177e4
LT		 2197 }
2198 break;
f1c39fad 2199 case USB_PORT_FEAT_POWER:
1cd8fd28
TB		 2200 if (hcd->speed == HCD_USB3)
2201 dum_hcd->port_status |= USB_SS_PORT_STAT_POWER;
2202 else
2203 dum_hcd->port_status |= USB_PORT_STAT_POWER;
cdfcbd2c 2204 set_link_state(dum_hcd);
f1c39fad 2205 break;
1cd8fd28
TB		 2206 case USB_PORT_FEAT_BH_PORT_RESET:
2207 /* Applicable only for USB3.0 hub */
2208 if (hcd->speed != HCD_USB3) {
2209 dev_dbg(dummy_dev(dum_hcd),
2210 "USB_PORT_FEAT_BH_PORT_RESET req not "
2211 "supported for USB 2.0 roothub\n");
2212 goto error;
2213 }
2214 /* FALLS THROUGH */
1da177e4 2215 case USB_PORT_FEAT_RESET:
f1c39fad 2216 /* if it's already enabled, disable */
1cd8fd28
TB		 2217 if (hcd->speed == HCD_USB3) {
2218 dum_hcd->port_status = 0;
2219 dum_hcd->port_status =
2220 (USB_SS_PORT_STAT_POWER |
2221 USB_PORT_STAT_CONNECTION |
2222 USB_PORT_STAT_RESET);
2223 } else
2224 dum_hcd->port_status &= ~(USB_PORT_STAT_ENABLE
f1c39fad
AS		 2225 | USB_PORT_STAT_LOW_SPEED
2226 | USB_PORT_STAT_HIGH_SPEED);
cdfcbd2c
TB		 2227 /*
2228 * We want to reset device status. All but the
2229 * Self powered feature
2230 */
2231 dum_hcd->dum->devstatus &=
2232 (1 << USB_DEVICE_SELF_POWERED);
1cd8fd28
TB		 2233 /*
2234 * FIXME USB3.0: what is the correct reset signaling
2235 * interval? Is it still 50msec as for HS?
2236 */
cdfcbd2c 2237 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50);
f1c39fad 2238 /* FALLS THROUGH */
1da177e4 2239 default:
1cd8fd28
TB		 2240 if (hcd->speed == HCD_USB3) {
2241 if ((dum_hcd->port_status &
2242 USB_SS_PORT_STAT_POWER) != 0) {
2243 dum_hcd->port_status |= (1 << wValue);
2244 set_link_state(dum_hcd);
2245 }
2246 } else
2247 if ((dum_hcd->port_status &
2248 USB_PORT_STAT_POWER) != 0) {
2249 dum_hcd->port_status |= (1 << wValue);
2250 set_link_state(dum_hcd);
2251 }
2252 }
2253 break;
2254 case GetPortErrorCount:
2255 if (hcd->speed != HCD_USB3) {
2256 dev_dbg(dummy_dev(dum_hcd),
2257 "GetPortErrorCount req not "
2258 "supported for USB 2.0 roothub\n");
2259 goto error;
2260 }
2261 /* We'll always return 0 since this is a dummy hub */
2262 *(__le32 *) buf = cpu_to_le32(0);
2263 break;
2264 case SetHubDepth:
2265 if (hcd->speed != HCD_USB3) {
2266 dev_dbg(dummy_dev(dum_hcd),
2267 "SetHubDepth req not supported for "
2268 "USB 2.0 roothub\n");
2269 goto error;
1da177e4
LT		 2270 }
2271 break;
1da177e4 2272 default:
cdfcbd2c 2273 dev_dbg(dummy_dev(dum_hcd),
1da177e4
LT		 2274 "hub control req%04x v%04x i%04x l%d\n",
2275 typeReq, wValue, wIndex, wLength);
1cd8fd28 2276error:
1da177e4
LT		 2277 /* "protocol stall" on error */
2278 retval = -EPIPE;
2279 }
cdfcbd2c 2280 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
685eb93f 2281
cdfcbd2c 2282 if ((dum_hcd->port_status & PORT_C_MASK) != 0)
18f2cbaa 2283 usb_hcd_poll_rh_status(hcd);
1da177e4
LT		 2284 return retval;
2285}
2286
18f2cbaa 2287static int dummy_bus_suspend(struct usb_hcd *hcd)
391eca9d 2288{
cdfcbd2c 2289 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
391eca9d 2290
18f2cbaa 2291 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
3cf0a22e 2292
cdfcbd2c
TB		 2293 spin_lock_irq(&dum_hcd->dum->lock);
2294 dum_hcd->rh_state = DUMMY_RH_SUSPENDED;
2295 set_link_state(dum_hcd);
3cf0a22e 2296 hcd->state = HC_STATE_SUSPENDED;
cdfcbd2c 2297 spin_unlock_irq(&dum_hcd->dum->lock);
391eca9d
AS		 2298 return 0;
2299}
2300
18f2cbaa 2301static int dummy_bus_resume(struct usb_hcd *hcd)
391eca9d 2302{
cdfcbd2c 2303 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
3cf0a22e
AS		 2304 int rc = 0;
2305
18f2cbaa 2306 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
391eca9d 2307
cdfcbd2c 2308 spin_lock_irq(&dum_hcd->dum->lock);
541c7d43 2309 if (!HCD_HW_ACCESSIBLE(hcd)) {
cfa59dab 2310 rc = -ESHUTDOWN;
3cf0a22e 2311 } else {
cdfcbd2c
TB		 2312 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2313 set_link_state(dum_hcd);
2314 if (!list_empty(&dum_hcd->urbp_list))
2315 mod_timer(&dum_hcd->timer, jiffies);
3cf0a22e
AS		 2316 hcd->state = HC_STATE_RUNNING;
2317 }
cdfcbd2c 2318 spin_unlock_irq(&dum_hcd->dum->lock);
3cf0a22e 2319 return rc;
391eca9d 2320}
1da177e4
LT		 2321
2322/*-------------------------------------------------------------------------*/
2323
18f2cbaa 2324static inline ssize_t show_urb(char *buf, size_t size, struct urb *urb)
1da177e4 2325{
18f2cbaa 2326 int ep = usb_pipeendpoint(urb->pipe);
1da177e4 2327
18f2cbaa 2328 return snprintf(buf, size,
1da177e4
LT		 2329 "urb/%p %s ep%d%s%s len %d/%d\n",
2330 urb,
2331 ({ char *s;
18f2cbaa
SAS		 2332 switch (urb->dev->speed) {
2333 case USB_SPEED_LOW:
7c884fe4
TB		 2334 s = "ls";
2335 break;
18f2cbaa 2336 case USB_SPEED_FULL:
7c884fe4
TB		 2337 s = "fs";
2338 break;
18f2cbaa 2339 case USB_SPEED_HIGH:
7c884fe4
TB		 2340 s = "hs";
2341 break;
18f2cbaa 2342 case USB_SPEED_SUPER:
1cd8fd28
TB		 2343 s = "ss";
2344 break;
18f2cbaa 2345 default:
7c884fe4
TB		 2346 s = "?";
2347 break;
2b84f92b 2348 } s; }),
18f2cbaa 2349 ep, ep ? (usb_pipein(urb->pipe) ? "in" : "out") : "",
1da177e4 2350 ({ char *s; \
18f2cbaa
SAS		 2351 switch (usb_pipetype(urb->pipe)) { \
2352 case PIPE_CONTROL: \
7c884fe4
TB		 2353 s = ""; \
2354 break; \
18f2cbaa 2355 case PIPE_BULK: \
7c884fe4
TB		 2356 s = "-bulk"; \
2357 break; \
18f2cbaa 2358 case PIPE_INTERRUPT: \
7c884fe4
TB		 2359 s = "-int"; \
2360 break; \
18f2cbaa 2361 default: \
7c884fe4
TB		 2362 s = "-iso"; \
2363 break; \
2b84f92b 2364 } s; }),
1da177e4
LT		 2365 urb->actual_length, urb->transfer_buffer_length);
2366}
2367
ce26bd23 2368static ssize_t urbs_show(struct device *dev, struct device_attribute *attr,
18f2cbaa 2369 char *buf)
1da177e4 2370{
18f2cbaa 2371 struct usb_hcd *hcd = dev_get_drvdata(dev);
cdfcbd2c 2372 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
1da177e4
LT		 2373 struct urbp *urbp;
2374 size_t size = 0;
2375 unsigned long flags;
2376
cdfcbd2c
TB		 2377 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2378 list_for_each_entry(urbp, &dum_hcd->urbp_list, urbp_list) {
1da177e4
LT		 2379 size_t temp;
2380
18f2cbaa 2381 temp = show_urb(buf, PAGE_SIZE - size, urbp->urb);
1da177e4
LT		 2382 buf += temp;
2383 size += temp;
2384 }
cdfcbd2c 2385 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1da177e4
LT		 2386
2387 return size;
2388}
ce26bd23 2389static DEVICE_ATTR_RO(urbs);
1da177e4 2390
1cd8fd28
TB		 2391static int dummy_start_ss(struct dummy_hcd *dum_hcd)
2392{
2393 init_timer(&dum_hcd->timer);
2394 dum_hcd->timer.function = dummy_timer;
2395 dum_hcd->timer.data = (unsigned long)dum_hcd;
2396 dum_hcd->rh_state = DUMMY_RH_RUNNING;
a54c979f 2397 dum_hcd->stream_en_ep = 0;
1cd8fd28
TB		 2398 INIT_LIST_HEAD(&dum_hcd->urbp_list);
2399 dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET;
2400 dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING;
2401 dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1;
2402#ifdef CONFIG_USB_OTG
2403 dummy_hcd_to_hcd(dum_hcd)->self.otg_port = 1;
2404#endif
2405 return 0;
2406
2407 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
2408 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
2409}
2410
cdfcbd2c 2411static int dummy_start(struct usb_hcd *hcd)
1da177e4 2412{
cdfcbd2c 2413 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
1da177e4
LT		 2414
2415 /*
2416 * MASTER side init ... we emulate a root hub that'll only ever
2417 * talk to one device (the slave side). Also appears in sysfs,
2418 * just like more familiar pci-based HCDs.
2419 */
1cd8fd28
TB		 2420 if (!usb_hcd_is_primary_hcd(hcd))
2421 return dummy_start_ss(dum_hcd);
2422
cdfcbd2c
TB		 2423 spin_lock_init(&dum_hcd->dum->lock);
2424 init_timer(&dum_hcd->timer);
2425 dum_hcd->timer.function = dummy_timer;
2426 dum_hcd->timer.data = (unsigned long)dum_hcd;
2427 dum_hcd->rh_state = DUMMY_RH_RUNNING;
1da177e4 2428
cdfcbd2c 2429 INIT_LIST_HEAD(&dum_hcd->urbp_list);
1da177e4 2430
caf29f62 2431 hcd->power_budget = POWER_BUDGET;
1da177e4 2432 hcd->state = HC_STATE_RUNNING;
685eb93f 2433 hcd->uses_new_polling = 1;
1da177e4 2434
5742b0c9
AS		 2435#ifdef CONFIG_USB_OTG
2436 hcd->self.otg_port = 1;
2437#endif
2438
1da177e4 2439 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
cdfcbd2c 2440 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
1da177e4
LT		 2441}
2442
18f2cbaa 2443static void dummy_stop(struct usb_hcd *hcd)
1da177e4 2444{
cdfcbd2c 2445 device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs);
cdfcbd2c 2446 dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n");
1da177e4
LT		 2447}
2448
2449/*-------------------------------------------------------------------------*/
2450
18f2cbaa 2451static int dummy_h_get_frame(struct usb_hcd *hcd)
1da177e4 2452{
18f2cbaa 2453 return dummy_g_get_frame(NULL);
1da177e4
LT		 2454}
2455
cdfcbd2c
TB		 2456static int dummy_setup(struct usb_hcd *hcd)
2457{
b100a2f3
SAS		 2458 struct dummy *dum;
2459
2460 dum = *((void **)dev_get_platdata(hcd->self.controller));
14fce33a 2461 hcd->self.sg_tablesize = ~0;
cdfcbd2c 2462 if (usb_hcd_is_primary_hcd(hcd)) {
b100a2f3
SAS		 2463 dum->hs_hcd = hcd_to_dummy_hcd(hcd);
2464 dum->hs_hcd->dum = dum;
1cd8fd28
TB		 2465 /*
2466 * Mark the first roothub as being USB 2.0.
2467 * The USB 3.0 roothub will be registered later by
2468 * dummy_hcd_probe()
2469 */
cdfcbd2c
TB		 2470 hcd->speed = HCD_USB2;
2471 hcd->self.root_hub->speed = USB_SPEED_HIGH;
1cd8fd28 2472 } else {
b100a2f3
SAS		 2473 dum->ss_hcd = hcd_to_dummy_hcd(hcd);
2474 dum->ss_hcd->dum = dum;
1cd8fd28
TB		 2475 hcd->speed = HCD_USB3;
2476 hcd->self.root_hub->speed = USB_SPEED_SUPER;
cdfcbd2c
TB		 2477 }
2478 return 0;
2479}
2480
1cd8fd28 2481/* Change a group of bulk endpoints to support multiple stream IDs */
d81f3e4f 2482static int dummy_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev,
1cd8fd28
TB		 2483 struct usb_host_endpoint **eps, unsigned int num_eps,
2484 unsigned int num_streams, gfp_t mem_flags)
2485{
a54c979f
SAS		 2486 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2487 unsigned long flags;
2488 int max_stream;
2489 int ret_streams = num_streams;
2490 unsigned int index;
2491 unsigned int i;
2492
2493 if (!num_eps)
2494 return -EINVAL;
2495
2496 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2497 for (i = 0; i < num_eps; i++) {
2498 index = dummy_get_ep_idx(&eps[i]->desc);
2499 if ((1 << index) & dum_hcd->stream_en_ep) {
2500 ret_streams = -EINVAL;
2501 goto out;
2502 }
2503 max_stream = usb_ss_max_streams(&eps[i]->ss_ep_comp);
2504 if (!max_stream) {
2505 ret_streams = -EINVAL;
2506 goto out;
2507 }
2508 if (max_stream < ret_streams) {
2509 dev_dbg(dummy_dev(dum_hcd), "Ep 0x%x only supports %u "
2510 "stream IDs.\n",
2511 eps[i]->desc.bEndpointAddress,
2512 max_stream);
2513 ret_streams = max_stream;
2514 }
2515 }
2516
2517 for (i = 0; i < num_eps; i++) {
2518 index = dummy_get_ep_idx(&eps[i]->desc);
2519 dum_hcd->stream_en_ep |= 1 << index;
2520 set_max_streams_for_pipe(dum_hcd,
2521 usb_endpoint_num(&eps[i]->desc), ret_streams);
2522 }
2523out:
2524 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2525 return ret_streams;
1cd8fd28
TB		 2526}
2527
2528/* Reverts a group of bulk endpoints back to not using stream IDs. */
d81f3e4f 2529static int dummy_free_streams(struct usb_hcd *hcd, struct usb_device *udev,
1cd8fd28
TB		 2530 struct usb_host_endpoint **eps, unsigned int num_eps,
2531 gfp_t mem_flags)
2532{
a54c979f
SAS		 2533 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2534 unsigned long flags;
2535 int ret;
2536 unsigned int index;
2537 unsigned int i;
2538
2539 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2540 for (i = 0; i < num_eps; i++) {
2541 index = dummy_get_ep_idx(&eps[i]->desc);
2542 if (!((1 << index) & dum_hcd->stream_en_ep)) {
2543 ret = -EINVAL;
2544 goto out;
2545 }
2546 }
2547
2548 for (i = 0; i < num_eps; i++) {
2549 index = dummy_get_ep_idx(&eps[i]->desc);
2550 dum_hcd->stream_en_ep &= ~(1 << index);
2551 set_max_streams_for_pipe(dum_hcd,
2552 usb_endpoint_num(&eps[i]->desc), 0);
2553 }
2554 ret = 0;
2555out:
2556 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2557 return ret;
1cd8fd28
TB		 2558}
2559
2560static struct hc_driver dummy_hcd = {
1da177e4
LT		 2561 .description = (char *) driver_name,
2562 .product_desc = "Dummy host controller",
cdfcbd2c 2563 .hcd_priv_size = sizeof(struct dummy_hcd),
1da177e4 2564
1cd8fd28 2565 .flags = HCD_USB3 | HCD_SHARED,
1da177e4 2566
cdfcbd2c 2567 .reset = dummy_setup,
1da177e4
LT		 2568 .start = dummy_start,
2569 .stop = dummy_stop,
2570
18f2cbaa
SAS		 2571 .urb_enqueue = dummy_urb_enqueue,
2572 .urb_dequeue = dummy_urb_dequeue,
1da177e4 2573
18f2cbaa 2574 .get_frame_number = dummy_h_get_frame,
1da177e4 2575
18f2cbaa
SAS		 2576 .hub_status_data = dummy_hub_status,
2577 .hub_control = dummy_hub_control,
0c0382e3
AS		 2578 .bus_suspend = dummy_bus_suspend,
2579 .bus_resume = dummy_bus_resume,
1cd8fd28
TB		 2580
2581 .alloc_streams = dummy_alloc_streams,
2582 .free_streams = dummy_free_streams,
1da177e4
LT		 2583};
2584
8364d6b0 2585static int dummy_hcd_probe(struct platform_device *pdev)
1da177e4 2586{
b100a2f3 2587 struct dummy *dum;
cdfcbd2c 2588 struct usb_hcd *hs_hcd;
1cd8fd28 2589 struct usb_hcd *ss_hcd;
1da177e4
LT		 2590 int retval;
2591
8364d6b0 2592 dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
b100a2f3 2593 dum = *((void **)dev_get_platdata(&pdev->dev));
1da177e4 2594
1cd8fd28
TB		 2595 if (!mod_data.is_super_speed)
2596 dummy_hcd.flags = HCD_USB2;
cdfcbd2c
TB		 2597 hs_hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev));
2598 if (!hs_hcd)
1da177e4 2599 return -ENOMEM;
cdfcbd2c 2600 hs_hcd->has_tt = 1;
1da177e4 2601
cdfcbd2c 2602 retval = usb_add_hcd(hs_hcd, 0, 0);
1b68a4ca
SAS		 2603 if (retval)
2604 goto put_usb2_hcd;
1cd8fd28
TB		 2605
2606 if (mod_data.is_super_speed) {
2607 ss_hcd = usb_create_shared_hcd(&dummy_hcd, &pdev->dev,
2608 dev_name(&pdev->dev), hs_hcd);
2609 if (!ss_hcd) {
2610 retval = -ENOMEM;
2611 goto dealloc_usb2_hcd;
2612 }
2613
2614 retval = usb_add_hcd(ss_hcd, 0, 0);
2615 if (retval)
2616 goto put_usb3_hcd;
2617 }
2618 return 0;
2619
2620put_usb3_hcd:
2621 usb_put_hcd(ss_hcd);
2622dealloc_usb2_hcd:
1b68a4ca
SAS		 2623 usb_remove_hcd(hs_hcd);
2624put_usb2_hcd:
1cd8fd28 2625 usb_put_hcd(hs_hcd);
b100a2f3 2626 dum->hs_hcd = dum->ss_hcd = NULL;
1da177e4
LT		 2627 return retval;
2628}
2629
cdfcbd2c 2630static int dummy_hcd_remove(struct platform_device *pdev)
1da177e4 2631{
cdfcbd2c
TB		 2632 struct dummy *dum;
2633
18f2cbaa 2634 dum = hcd_to_dummy_hcd(platform_get_drvdata(pdev))->dum;
1cd8fd28
TB		 2635
2636 if (dum->ss_hcd) {
2637 usb_remove_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2638 usb_put_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2639 }
2640
cdfcbd2c
TB		 2641 usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
2642 usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
1cd8fd28 2643
b100a2f3
SAS		 2644 dum->hs_hcd = NULL;
2645 dum->ss_hcd = NULL;
1da177e4 2646
d9b76251 2647 return 0;
1da177e4
LT		 2648}
2649
18f2cbaa 2650static int dummy_hcd_suspend(struct platform_device *pdev, pm_message_t state)
391eca9d
AS		 2651{
2652 struct usb_hcd *hcd;
cdfcbd2c 2653 struct dummy_hcd *dum_hcd;
3cf0a22e 2654 int rc = 0;
391eca9d 2655
18f2cbaa 2656 dev_dbg(&pdev->dev, "%s\n", __func__);
391eca9d 2657
18f2cbaa 2658 hcd = platform_get_drvdata(pdev);
cdfcbd2c
TB		 2659 dum_hcd = hcd_to_dummy_hcd(hcd);
2660 if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
3cf0a22e
AS		 2661 dev_warn(&pdev->dev, "Root hub isn't suspended!\n");
2662 rc = -EBUSY;
2663 } else
2664 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
2665 return rc;
391eca9d
AS		 2666}
2667
18f2cbaa 2668static int dummy_hcd_resume(struct platform_device *pdev)
391eca9d
AS		 2669{
2670 struct usb_hcd *hcd;
2671
18f2cbaa 2672 dev_dbg(&pdev->dev, "%s\n", __func__);
391eca9d 2673
18f2cbaa 2674 hcd = platform_get_drvdata(pdev);
3cf0a22e 2675 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
18f2cbaa 2676 usb_hcd_poll_rh_status(hcd);
391eca9d
AS		 2677 return 0;
2678}
2679
3ae5eaec 2680static struct platform_driver dummy_hcd_driver = {
d9b76251
AS		 2681 .probe = dummy_hcd_probe,
2682 .remove = dummy_hcd_remove,
391eca9d
AS		 2683 .suspend = dummy_hcd_suspend,
2684 .resume = dummy_hcd_resume,
3ae5eaec
RK		 2685 .driver = {
2686 .name = (char *) driver_name,
3ae5eaec 2687 },
d9b76251 2688};
1da177e4 2689
d9b76251 2690/*-------------------------------------------------------------------------*/
b100a2f3 2691#define MAX_NUM_UDC 2
b2113136
SAS		 2692static struct platform_device *the_udc_pdev[MAX_NUM_UDC];
2693static struct platform_device *the_hcd_pdev[MAX_NUM_UDC];
1da177e4 2694
18f2cbaa 2695static int __init init(void)
1da177e4 2696{
a89a2cd3 2697 int retval = -ENOMEM;
c7a1db45 2698 int i;
b100a2f3 2699 struct dummy *dum[MAX_NUM_UDC];
1da177e4 2700
18f2cbaa 2701 if (usb_disabled())
1da177e4 2702 return -ENODEV;
d9b76251 2703
7eca4c5a
TB		 2704 if (!mod_data.is_high_speed && mod_data.is_super_speed)
2705 return -EINVAL;
2706
c7a1db45 2707 if (mod_data.num < 1 || mod_data.num > MAX_NUM_UDC) {
fa84acf0 2708 pr_err("Number of emulated UDC must be in range of 1...%d\n",
c7a1db45
SAS		 2709 MAX_NUM_UDC);
2710 return -EINVAL;
2711 }
b100a2f3 2712
c7a1db45
SAS		 2713 for (i = 0; i < mod_data.num; i++) {
2714 the_hcd_pdev[i] = platform_device_alloc(driver_name, i);
2715 if (!the_hcd_pdev[i]) {
2716 i--;
2717 while (i >= 0)
2718 platform_device_put(the_hcd_pdev[i--]);
2719 return retval;
2720 }
2721 }
2722 for (i = 0; i < mod_data.num; i++) {
2723 the_udc_pdev[i] = platform_device_alloc(gadget_name, i);
2724 if (!the_udc_pdev[i]) {
2725 i--;
2726 while (i >= 0)
2727 platform_device_put(the_udc_pdev[i--]);
2728 goto err_alloc_udc;
2729 }
2730 }
b100a2f3
SAS		 2731 for (i = 0; i < mod_data.num; i++) {
2732 dum[i] = kzalloc(sizeof(struct dummy), GFP_KERNEL);
481d3042
WY		 2733 if (!dum[i]) {
2734 retval = -ENOMEM;
b100a2f3 2735 goto err_add_pdata;
481d3042 2736 }
b100a2f3
SAS		 2737 retval = platform_device_add_data(the_hcd_pdev[i], &dum[i],
2738 sizeof(void *));
2739 if (retval)
2740 goto err_add_pdata;
2741 retval = platform_device_add_data(the_udc_pdev[i], &dum[i],
2742 sizeof(void *));
2743 if (retval)
2744 goto err_add_pdata;
2745 }
d9b76251 2746
a89a2cd3
AS		 2747 retval = platform_driver_register(&dummy_hcd_driver);
2748 if (retval < 0)
b100a2f3 2749 goto err_add_pdata;
a89a2cd3 2750 retval = platform_driver_register(&dummy_udc_driver);
d9b76251
AS		 2751 if (retval < 0)
2752 goto err_register_udc_driver;
2753
c7a1db45
SAS		 2754 for (i = 0; i < mod_data.num; i++) {
2755 retval = platform_device_add(the_hcd_pdev[i]);
2756 if (retval < 0) {
2757 i--;
2758 while (i >= 0)
2759 platform_device_del(the_hcd_pdev[i--]);
2760 goto err_add_hcd;
2761 }
2762 }
b100a2f3
SAS		 2763 for (i = 0; i < mod_data.num; i++) {
2764 if (!dum[i]->hs_hcd ||
2765 (!dum[i]->ss_hcd && mod_data.is_super_speed)) {
2766 /*
2767 * The hcd was added successfully but its probe
2768 * function failed for some reason.
2769 */
2770 retval = -EINVAL;
2771 goto err_add_udc;
2772 }
865835fa 2773 }
c7a1db45 2774
c7a1db45
SAS		 2775 for (i = 0; i < mod_data.num; i++) {
2776 retval = platform_device_add(the_udc_pdev[i]);
2777 if (retval < 0) {
2778 i--;
2779 while (i >= 0)
2780 platform_device_del(the_udc_pdev[i]);
2781 goto err_add_udc;
2782 }
2783 }
2784
2785 for (i = 0; i < mod_data.num; i++) {
2786 if (!platform_get_drvdata(the_udc_pdev[i])) {
2787 /*
2788 * The udc was added successfully but its probe
2789 * function failed for some reason.
2790 */
2791 retval = -EINVAL;
2792 goto err_probe_udc;
2793 }
865835fa 2794 }
d9b76251
AS		 2795 return retval;
2796
865835fa 2797err_probe_udc:
c7a1db45
SAS		 2798 for (i = 0; i < mod_data.num; i++)
2799 platform_device_del(the_udc_pdev[i]);
a89a2cd3 2800err_add_udc:
c7a1db45
SAS		 2801 for (i = 0; i < mod_data.num; i++)
2802 platform_device_del(the_hcd_pdev[i]);
a89a2cd3
AS		 2803err_add_hcd:
2804 platform_driver_unregister(&dummy_udc_driver);
d9b76251 2805err_register_udc_driver:
a89a2cd3 2806 platform_driver_unregister(&dummy_hcd_driver);
b100a2f3
SAS		 2807err_add_pdata:
2808 for (i = 0; i < mod_data.num; i++)
2809 kfree(dum[i]);
c7a1db45
SAS		 2810 for (i = 0; i < mod_data.num; i++)
2811 platform_device_put(the_udc_pdev[i]);
a89a2cd3 2812err_alloc_udc:
c7a1db45
SAS		 2813 for (i = 0; i < mod_data.num; i++)
2814 platform_device_put(the_hcd_pdev[i]);
1da177e4
LT		 2815 return retval;
2816}
18f2cbaa 2817module_init(init);
1da177e4 2818
18f2cbaa 2819static void __exit cleanup(void)
1da177e4 2820{
c7a1db45
SAS		 2821 int i;
2822
2823 for (i = 0; i < mod_data.num; i++) {
b100a2f3
SAS		 2824 struct dummy *dum;
2825
2826 dum = *((void **)dev_get_platdata(&the_udc_pdev[i]->dev));
2827
c7a1db45
SAS		 2828 platform_device_unregister(the_udc_pdev[i]);
2829 platform_device_unregister(the_hcd_pdev[i]);
b100a2f3 2830 kfree(dum);
c7a1db45 2831 }
a89a2cd3
AS		 2832 platform_driver_unregister(&dummy_udc_driver);
2833 platform_driver_unregister(&dummy_hcd_driver);
1da177e4 2834}
18f2cbaa 2835module_exit(cleanup);
Linux kernel - Deliverables
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