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Merge branch 'for-linus-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mason...
[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
LT		 649{
650 struct dummy_ep *ep;
651 struct dummy_request *req;
652
653 if (!_ep)
654 return NULL;
18f2cbaa 655 ep = usb_ep_to_dummy_ep(_ep);
1da177e4 656
7039f422 657 req = kzalloc(sizeof(*req), mem_flags);
1da177e4
LT		 658 if (!req)
659 return NULL;
18f2cbaa 660 INIT_LIST_HEAD(&req->queue);
1da177e4
LT		 661 return &req->req;
662}
663
18f2cbaa 664static void dummy_free_request(struct usb_ep *_ep, struct usb_request *_req)
1da177e4 665{
1da177e4
LT		 666 struct dummy_request *req;
667
f99987bb 668 if (!_ep || !_req) {
72688dc9 669 WARN_ON(1);
1da177e4 670 return;
f99987bb 671 }
1da177e4 672
18f2cbaa
SAS		 673 req = usb_request_to_dummy_request(_req);
674 WARN_ON(!list_empty(&req->queue));
675 kfree(req);
1da177e4
LT		 676}
677
18f2cbaa 678static void fifo_complete(struct usb_ep *ep, struct usb_request *req)
1da177e4
LT		 679{
680}
681
18f2cbaa 682static int dummy_queue(struct usb_ep *_ep, struct usb_request *_req,
55016f10 683 gfp_t mem_flags)
1da177e4
LT		 684{
685 struct dummy_ep *ep;
686 struct dummy_request *req;
687 struct dummy *dum;
cdfcbd2c 688 struct dummy_hcd *dum_hcd;
1da177e4
LT		 689 unsigned long flags;
690
18f2cbaa
SAS		 691 req = usb_request_to_dummy_request(_req);
692 if (!_req || !list_empty(&req->queue) || !_req->complete)
1da177e4
LT		 693 return -EINVAL;
694
18f2cbaa 695 ep = usb_ep_to_dummy_ep(_ep);
1da177e4
LT		 696 if (!_ep || (!ep->desc && _ep->name != ep0name))
697 return -EINVAL;
698
18f2cbaa 699 dum = ep_to_dummy(ep);
719e52cb 700 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
cdfcbd2c 701 if (!dum->driver || !is_enabled(dum_hcd))
1da177e4
LT		 702 return -ESHUTDOWN;
703
704#if 0
18f2cbaa 705 dev_dbg(udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n",
1da177e4
LT		 706 ep, _req, _ep->name, _req->length, _req->buf);
707#endif
1da177e4
LT		 708 _req->status = -EINPROGRESS;
709 _req->actual = 0;
18f2cbaa 710 spin_lock_irqsave(&dum->lock, flags);
1da177e4
LT		 711
712 /* implement an emulated single-request FIFO */
713 if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
18f2cbaa
SAS		 714 list_empty(&dum->fifo_req.queue) &&
715 list_empty(&ep->queue) &&
1da177e4
LT		 716 _req->length <= FIFO_SIZE) {
717 req = &dum->fifo_req;
718 req->req = *_req;
719 req->req.buf = dum->fifo_buf;
18f2cbaa 720 memcpy(dum->fifo_buf, _req->buf, _req->length);
1da177e4
LT		 721 req->req.context = dum;
722 req->req.complete = fifo_complete;
723
c728df70 724 list_add_tail(&req->queue, &ep->queue);
18f2cbaa 725 spin_unlock(&dum->lock);
1da177e4
LT		 726 _req->actual = _req->length;
727 _req->status = 0;
304f7e5e 728 usb_gadget_giveback_request(_ep, _req);
18f2cbaa 729 spin_lock(&dum->lock);
c728df70
DB		 730 } else
731 list_add_tail(&req->queue, &ep->queue);
18f2cbaa 732 spin_unlock_irqrestore(&dum->lock, flags);
1da177e4
LT		 733
734 /* real hardware would likely enable transfers here, in case
735 * it'd been left NAKing.
736 */
737 return 0;
738}
739
18f2cbaa 740static int dummy_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1da177e4
LT		 741{
742 struct dummy_ep *ep;
743 struct dummy *dum;
744 int retval = -EINVAL;
745 unsigned long flags;
746 struct dummy_request *req = NULL;
747
748 if (!_ep || !_req)
749 return retval;
18f2cbaa
SAS		 750 ep = usb_ep_to_dummy_ep(_ep);
751 dum = ep_to_dummy(ep);
1da177e4
LT		 752
753 if (!dum->driver)
754 return -ESHUTDOWN;
755
18f2cbaa
SAS		 756 local_irq_save(flags);
757 spin_lock(&dum->lock);
758 list_for_each_entry(req, &ep->queue, queue) {
1da177e4 759 if (&req->req == _req) {
18f2cbaa 760 list_del_init(&req->queue);
1da177e4
LT		 761 _req->status = -ECONNRESET;
762 retval = 0;
763 break;
764 }
765 }
18f2cbaa 766 spin_unlock(&dum->lock);
1da177e4
LT		 767
768 if (retval == 0) {
18f2cbaa 769 dev_dbg(udc_dev(dum),
1da177e4
LT		 770 "dequeued req %p from %s, len %d buf %p\n",
771 req, _ep->name, _req->length, _req->buf);
304f7e5e 772 usb_gadget_giveback_request(_ep, _req);
1da177e4 773 }
18f2cbaa 774 local_irq_restore(flags);
1da177e4
LT		 775 return retval;
776}
777
778static int
851a526d 779dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
1da177e4
LT		 780{
781 struct dummy_ep *ep;
782 struct dummy *dum;
783
784 if (!_ep)
785 return -EINVAL;
18f2cbaa
SAS		 786 ep = usb_ep_to_dummy_ep(_ep);
787 dum = ep_to_dummy(ep);
1da177e4
LT		 788 if (!dum->driver)
789 return -ESHUTDOWN;
790 if (!value)
851a526d 791 ep->halted = ep->wedged = 0;
1da177e4 792 else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
18f2cbaa 793 !list_empty(&ep->queue))
1da177e4 794 return -EAGAIN;
851a526d 795 else {
1da177e4 796 ep->halted = 1;
851a526d
AS		 797 if (wedged)
798 ep->wedged = 1;
799 }
1da177e4
LT		 800 /* FIXME clear emulated data toggle too */
801 return 0;
802}
803
851a526d
AS		 804static int
805dummy_set_halt(struct usb_ep *_ep, int value)
806{
807 return dummy_set_halt_and_wedge(_ep, value, 0);
808}
809
810static int dummy_set_wedge(struct usb_ep *_ep)
811{
812 if (!_ep || _ep->name == ep0name)
813 return -EINVAL;
814 return dummy_set_halt_and_wedge(_ep, 1, 1);
815}
816
1da177e4
LT		 817static const struct usb_ep_ops dummy_ep_ops = {
818 .enable = dummy_enable,
819 .disable = dummy_disable,
820
821 .alloc_request = dummy_alloc_request,
822 .free_request = dummy_free_request,
823
1da177e4
LT		 824 .queue = dummy_queue,
825 .dequeue = dummy_dequeue,
826
827 .set_halt = dummy_set_halt,
851a526d 828 .set_wedge = dummy_set_wedge,
1da177e4
LT		 829};
830
831/*-------------------------------------------------------------------------*/
832
833/* there are both host and device side versions of this call ... */
18f2cbaa 834static int dummy_g_get_frame(struct usb_gadget *_gadget)
1da177e4
LT		 835{
836 struct timeval tv;
837
18f2cbaa 838 do_gettimeofday(&tv);
1da177e4
LT		 839 return tv.tv_usec / 1000;
840}
841
18f2cbaa 842static int dummy_wakeup(struct usb_gadget *_gadget)
1da177e4 843{
cdfcbd2c 844 struct dummy_hcd *dum_hcd;
1da177e4 845
cdfcbd2c
TB		 846 dum_hcd = gadget_to_dummy_hcd(_gadget);
847 if (!(dum_hcd->dum->devstatus & ((1 << USB_DEVICE_B_HNP_ENABLE)
5742b0c9 848 | (1 << USB_DEVICE_REMOTE_WAKEUP))))
1da177e4 849 return -EINVAL;
cdfcbd2c 850 if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0)
391eca9d 851 return -ENOLINK;
cdfcbd2c
TB		 852 if ((dum_hcd->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
853 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
391eca9d
AS		 854 return -EIO;
855
856 /* FIXME: What if the root hub is suspended but the port isn't? */
1da177e4
LT		 857
858 /* hub notices our request, issues downstream resume, etc */
cdfcbd2c
TB		 859 dum_hcd->resuming = 1;
860 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(20);
861 mod_timer(&dummy_hcd_to_hcd(dum_hcd)->rh_timer, dum_hcd->re_timeout);
1da177e4
LT		 862 return 0;
863}
864
18f2cbaa 865static int dummy_set_selfpowered(struct usb_gadget *_gadget, int value)
1da177e4
LT		 866{
867 struct dummy *dum;
868
5d9cb6af 869 _gadget->is_selfpowered = (value != 0);
18f2cbaa 870 dum = gadget_to_dummy_hcd(_gadget)->dum;
1da177e4
LT		 871 if (value)
872 dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
873 else
874 dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
875 return 0;
876}
877
d262127c 878static void dummy_udc_update_ep0(struct dummy *dum)
b5738413 879{
c6884191 880 if (dum->gadget.speed == USB_SPEED_SUPER)
b5738413 881 dum->ep[0].ep.maxpacket = 9;
c6884191 882 else
b5738413 883 dum->ep[0].ep.maxpacket = 64;
b5738413
SAS		 884}
885
18f2cbaa 886static int dummy_pullup(struct usb_gadget *_gadget, int value)
f1c39fad 887{
d8a14a85 888 struct dummy_hcd *dum_hcd;
f1c39fad
AS		 889 struct dummy *dum;
890 unsigned long flags;
891
b5738413
SAS		 892 dum = gadget_dev_to_dummy(&_gadget->dev);
893
894 if (value && dum->driver) {
895 if (mod_data.is_super_speed)
7177aed4 896 dum->gadget.speed = dum->driver->max_speed;
b5738413
SAS		 897 else if (mod_data.is_high_speed)
898 dum->gadget.speed = min_t(u8, USB_SPEED_HIGH,
7177aed4 899 dum->driver->max_speed);
b5738413
SAS		 900 else
901 dum->gadget.speed = USB_SPEED_FULL;
d262127c 902 dummy_udc_update_ep0(dum);
b5738413 903
7177aed4 904 if (dum->gadget.speed < dum->driver->max_speed)
b5738413 905 dev_dbg(udc_dev(dum), "This device can perform faster"
7177aed4
MN		 906 " if you connect it to a %s port...\n",
907 usb_speed_string(dum->driver->max_speed));
b5738413 908 }
d8a14a85 909 dum_hcd = gadget_to_dummy_hcd(_gadget);
d8a14a85 910
18f2cbaa 911 spin_lock_irqsave(&dum->lock, flags);
f1c39fad 912 dum->pullup = (value != 0);
d8a14a85 913 set_link_state(dum_hcd);
18f2cbaa 914 spin_unlock_irqrestore(&dum->lock, flags);
b5738413 915
d8a14a85 916 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
f1c39fad
AS		 917 return 0;
918}
919
aa074739
SAS		 920static int dummy_udc_start(struct usb_gadget *g,
921 struct usb_gadget_driver *driver);
22835b80 922static int dummy_udc_stop(struct usb_gadget *g);
0f91349b 923
1da177e4
LT		 924static const struct usb_gadget_ops dummy_ops = {
925 .get_frame = dummy_g_get_frame,
926 .wakeup = dummy_wakeup,
927 .set_selfpowered = dummy_set_selfpowered,
f1c39fad 928 .pullup = dummy_pullup,
aa074739
SAS		 929 .udc_start = dummy_udc_start,
930 .udc_stop = dummy_udc_stop,
1da177e4
LT		 931};
932
933/*-------------------------------------------------------------------------*/
934
935/* "function" sysfs attribute */
ce26bd23 936static ssize_t function_show(struct device *dev, struct device_attribute *attr,
18f2cbaa 937 char *buf)
1da177e4 938{
18f2cbaa 939 struct dummy *dum = gadget_dev_to_dummy(dev);
1da177e4
LT		 940
941 if (!dum->driver || !dum->driver->function)
942 return 0;
18f2cbaa 943 return scnprintf(buf, PAGE_SIZE, "%s\n", dum->driver->function);
1da177e4 944}
ce26bd23 945static DEVICE_ATTR_RO(function);
1da177e4
LT		 946
947/*-------------------------------------------------------------------------*/
948
949/*
950 * Driver registration/unregistration.
951 *
952 * This is basically hardware-specific; there's usually only one real USB
953 * device (not host) controller since that's how USB devices are intended
954 * to work. So most implementations of these api calls will rely on the
955 * fact that only one driver will ever bind to the hardware. But curious
956 * hardware can be built with discrete components, so the gadget API doesn't
957 * require that assumption.
958 *
959 * For this emulator, it might be convenient to create a usb slave device
960 * for each driver that registers: just add to a big root hub.
961 */
962
aa074739
SAS		 963static int dummy_udc_start(struct usb_gadget *g,
964 struct usb_gadget_driver *driver)
1da177e4 965{
aa074739
SAS		 966 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
967 struct dummy *dum = dum_hcd->dum;
1da177e4 968
7177aed4 969 if (driver->max_speed == USB_SPEED_UNKNOWN)
1da177e4
LT		 970 return -EINVAL;
971
972 /*
973 * SLAVE side init ... the layer above hardware, which
974 * can't enumerate without help from the driver we're binding.
975 */
5742b0c9 976
1da177e4 977 dum->devstatus = 0;
1da177e4 978 dum->driver = driver;
dd7e6dd5 979
1da177e4
LT		 980 return 0;
981}
1da177e4 982
22835b80 983static int dummy_udc_stop(struct usb_gadget *g)
1da177e4 984{
aa074739
SAS		 985 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
986 struct dummy *dum = dum_hcd->dum;
1da177e4 987
1da177e4 988 dum->driver = NULL;
25427874 989
1da177e4
LT		 990 return 0;
991}
1da177e4
LT		 992
993#undef is_enabled
994
d9b76251
AS		 995/* The gadget structure is stored inside the hcd structure and will be
996 * released along with it. */
0fb57599
SAS		 997static void init_dummy_udc_hw(struct dummy *dum)
998{
999 int i;
1000
1001 INIT_LIST_HEAD(&dum->gadget.ep_list);
1002 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
1003 struct dummy_ep *ep = &dum->ep[i];
1004
7a3b8e70 1005 if (!ep_info[i].name)
0fb57599 1006 break;
7a3b8e70
RB		 1007 ep->ep.name = ep_info[i].name;
1008 ep->ep.caps = ep_info[i].caps;
0fb57599
SAS		 1009 ep->ep.ops = &dummy_ep_ops;
1010 list_add_tail(&ep->ep.ep_list, &dum->gadget.ep_list);
1011 ep->halted = ep->wedged = ep->already_seen =
1012 ep->setup_stage = 0;
e117e742 1013 usb_ep_set_maxpacket_limit(&ep->ep, ~0);
c6884191 1014 ep->ep.max_streams = 16;
0fb57599
SAS		 1015 ep->last_io = jiffies;
1016 ep->gadget = &dum->gadget;
1017 ep->desc = NULL;
1018 INIT_LIST_HEAD(&ep->queue);
1019 }
1020
1021 dum->gadget.ep0 = &dum->ep[0].ep;
1022 list_del_init(&dum->ep[0].ep.ep_list);
1023 INIT_LIST_HEAD(&dum->fifo_req.queue);
f8744d40
SAS		 1024
1025#ifdef CONFIG_USB_OTG
1026 dum->gadget.is_otg = 1;
1027#endif
0fb57599
SAS		 1028}
1029
18f2cbaa 1030static int dummy_udc_probe(struct platform_device *pdev)
d9b76251 1031{
b100a2f3 1032 struct dummy *dum;
d9b76251
AS		 1033 int rc;
1034
b100a2f3 1035 dum = *((void **)dev_get_platdata(&pdev->dev));
d9b76251
AS		 1036 dum->gadget.name = gadget_name;
1037 dum->gadget.ops = &dummy_ops;
d327ab5b 1038 dum->gadget.max_speed = USB_SPEED_SUPER;
d9b76251 1039
8364d6b0 1040 dum->gadget.dev.parent = &pdev->dev;
0fb57599
SAS		 1041 init_dummy_udc_hw(dum);
1042
0f91349b
SAS		 1043 rc = usb_add_gadget_udc(&pdev->dev, &dum->gadget);
1044 if (rc < 0)
1045 goto err_udc;
1046
18f2cbaa 1047 rc = device_create_file(&dum->gadget.dev, &dev_attr_function);
efd54a36 1048 if (rc < 0)
0f91349b
SAS		 1049 goto err_dev;
1050 platform_set_drvdata(pdev, dum);
1051 return rc;
1052
1053err_dev:
1054 usb_del_gadget_udc(&dum->gadget);
1055err_udc:
d9b76251
AS		 1056 return rc;
1057}
1058
18f2cbaa 1059static int dummy_udc_remove(struct platform_device *pdev)
d9b76251 1060{
18f2cbaa 1061 struct dummy *dum = platform_get_drvdata(pdev);
d9b76251 1062
18f2cbaa 1063 device_remove_file(&dum->gadget.dev, &dev_attr_function);
5f5610f6 1064 usb_del_gadget_udc(&dum->gadget);
d9b76251
AS		 1065 return 0;
1066}
1067
fc0b721f
SAS		 1068static void dummy_udc_pm(struct dummy *dum, struct dummy_hcd *dum_hcd,
1069 int suspend)
391eca9d 1070{
fc0b721f
SAS		 1071 spin_lock_irq(&dum->lock);
1072 dum->udc_suspended = suspend;
d8a14a85 1073 set_link_state(dum_hcd);
fc0b721f
SAS		 1074 spin_unlock_irq(&dum->lock);
1075}
1076
1077static int dummy_udc_suspend(struct platform_device *pdev, pm_message_t state)
1078{
1079 struct dummy *dum = platform_get_drvdata(pdev);
1080 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
391eca9d 1081
fc0b721f
SAS		 1082 dev_dbg(&pdev->dev, "%s\n", __func__);
1083 dummy_udc_pm(dum, dum_hcd, 1);
d8a14a85 1084 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
391eca9d
AS		 1085 return 0;
1086}
1087
fc0b721f 1088static int dummy_udc_resume(struct platform_device *pdev)
391eca9d 1089{
fc0b721f
SAS		 1090 struct dummy *dum = platform_get_drvdata(pdev);
1091 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
391eca9d 1092
fc0b721f
SAS		 1093 dev_dbg(&pdev->dev, "%s\n", __func__);
1094 dummy_udc_pm(dum, dum_hcd, 0);
d8a14a85 1095 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
391eca9d
AS		 1096 return 0;
1097}
1098
3ae5eaec 1099static struct platform_driver dummy_udc_driver = {
d9b76251
AS		 1100 .probe = dummy_udc_probe,
1101 .remove = dummy_udc_remove,
391eca9d
AS		 1102 .suspend = dummy_udc_suspend,
1103 .resume = dummy_udc_resume,
3ae5eaec
RK		 1104 .driver = {
1105 .name = (char *) gadget_name,
3ae5eaec 1106 },
d9b76251
AS		 1107};
1108
1da177e4
LT		 1109/*-------------------------------------------------------------------------*/
1110
a54c979f
SAS		 1111static unsigned int dummy_get_ep_idx(const struct usb_endpoint_descriptor *desc)
1112{
1113 unsigned int index;
1114
1115 index = usb_endpoint_num(desc) << 1;
1116 if (usb_endpoint_dir_in(desc))
1117 index |= 1;
1118 return index;
1119}
1120
1da177e4
LT		 1121/* MASTER/HOST SIDE DRIVER
1122 *
1123 * this uses the hcd framework to hook up to host side drivers.
1124 * its root hub will only have one device, otherwise it acts like
1125 * a normal host controller.
1126 *
1127 * when urbs are queued, they're just stuck on a list that we
1128 * scan in a timer callback. that callback connects writes from
1129 * the host with reads from the device, and so on, based on the
1130 * usb 2.0 rules.
1131 */
1132
a54c979f
SAS		 1133static int dummy_ep_stream_en(struct dummy_hcd *dum_hcd, struct urb *urb)
1134{
1135 const struct usb_endpoint_descriptor *desc = &urb->ep->desc;
1136 u32 index;
1137
1138 if (!usb_endpoint_xfer_bulk(desc))
1139 return 0;
1140
1141 index = dummy_get_ep_idx(desc);
1142 return (1 << index) & dum_hcd->stream_en_ep;
1143}
1144
1145/*
1146 * The max stream number is saved as a nibble so for the 30 possible endpoints
1147 * we only 15 bytes of memory. Therefore we are limited to max 16 streams (0
1148 * means we use only 1 stream). The maximum according to the spec is 16bit so
1149 * if the 16 stream limit is about to go, the array size should be incremented
1150 * to 30 elements of type u16.
1151 */
1152static int get_max_streams_for_pipe(struct dummy_hcd *dum_hcd,
1153 unsigned int pipe)
1154{
1155 int max_streams;
1156
1157 max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)];
1158 if (usb_pipeout(pipe))
1159 max_streams >>= 4;
1160 else
1161 max_streams &= 0xf;
1162 max_streams++;
1163 return max_streams;
1164}
1165
1166static void set_max_streams_for_pipe(struct dummy_hcd *dum_hcd,
1167 unsigned int pipe, unsigned int streams)
1168{
1169 int max_streams;
1170
1171 streams--;
1172 max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)];
1173 if (usb_pipeout(pipe)) {
1174 streams <<= 4;
1175 max_streams &= 0xf;
1176 } else {
1177 max_streams &= 0xf0;
1178 }
1179 max_streams |= streams;
1180 dum_hcd->num_stream[usb_pipeendpoint(pipe)] = max_streams;
1181}
1182
1183static int dummy_validate_stream(struct dummy_hcd *dum_hcd, struct urb *urb)
1184{
1185 unsigned int max_streams;
1186 int enabled;
1187
1188 enabled = dummy_ep_stream_en(dum_hcd, urb);
1189 if (!urb->stream_id) {
1190 if (enabled)
1191 return -EINVAL;
1192 return 0;
1193 }
1194 if (!enabled)
1195 return -EINVAL;
1196
1197 max_streams = get_max_streams_for_pipe(dum_hcd,
1198 usb_pipeendpoint(urb->pipe));
1199 if (urb->stream_id > max_streams) {
1200 dev_err(dummy_dev(dum_hcd), "Stream id %d is out of range.\n",
1201 urb->stream_id);
1202 BUG();
1203 return -EINVAL;
1204 }
1205 return 0;
1206}
1207
18f2cbaa 1208static int dummy_urb_enqueue(
1da177e4 1209 struct usb_hcd *hcd,
1da177e4 1210 struct urb *urb,
55016f10 1211 gfp_t mem_flags
1da177e4 1212) {
cdfcbd2c 1213 struct dummy_hcd *dum_hcd;
1da177e4
LT		 1214 struct urbp *urbp;
1215 unsigned long flags;
e9df41c5 1216 int rc;
1da177e4 1217
18f2cbaa 1218 urbp = kmalloc(sizeof *urbp, mem_flags);
1da177e4
LT		 1219 if (!urbp)
1220 return -ENOMEM;
1221 urbp->urb = urb;
14fce33a 1222 urbp->miter_started = 0;
1da177e4 1223
cdfcbd2c
TB		 1224 dum_hcd = hcd_to_dummy_hcd(hcd);
1225 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
a54c979f
SAS		 1226
1227 rc = dummy_validate_stream(dum_hcd, urb);
1228 if (rc) {
1229 kfree(urbp);
1230 goto done;
1231 }
1232
e9df41c5
AS		 1233 rc = usb_hcd_link_urb_to_ep(hcd, urb);
1234 if (rc) {
1235 kfree(urbp);
1236 goto done;
1237 }
1da177e4 1238
cdfcbd2c
TB		 1239 if (!dum_hcd->udev) {
1240 dum_hcd->udev = urb->dev;
1241 usb_get_dev(dum_hcd->udev);
1242 } else if (unlikely(dum_hcd->udev != urb->dev))
1243 dev_err(dummy_dev(dum_hcd), "usb_device address has changed!\n");
1da177e4 1244
cdfcbd2c 1245 list_add_tail(&urbp->urbp_list, &dum_hcd->urbp_list);
1da177e4 1246 urb->hcpriv = urbp;
18f2cbaa 1247 if (usb_pipetype(urb->pipe) == PIPE_CONTROL)
1da177e4
LT		 1248 urb->error_count = 1; /* mark as a new urb */
1249
1250 /* kick the scheduler, it'll do the rest */
cdfcbd2c
TB		 1251 if (!timer_pending(&dum_hcd->timer))
1252 mod_timer(&dum_hcd->timer, jiffies + 1);
1da177e4 1253
e9df41c5 1254 done:
cdfcbd2c 1255 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
e9df41c5 1256 return rc;
1da177e4
LT		 1257}
1258
e9df41c5 1259static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1da177e4 1260{
cdfcbd2c 1261 struct dummy_hcd *dum_hcd;
391eca9d 1262 unsigned long flags;
e9df41c5 1263 int rc;
391eca9d
AS		 1264
1265 /* giveback happens automatically in timer callback,
1266 * so make sure the callback happens */
cdfcbd2c
TB		 1267 dum_hcd = hcd_to_dummy_hcd(hcd);
1268 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
e9df41c5
AS		 1269
1270 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
cdfcbd2c
TB		 1271 if (!rc && dum_hcd->rh_state != DUMMY_RH_RUNNING &&
1272 !list_empty(&dum_hcd->urbp_list))
1273 mod_timer(&dum_hcd->timer, jiffies);
e9df41c5 1274
cdfcbd2c 1275 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
e9df41c5 1276 return rc;
1da177e4
LT		 1277}
1278
a04ce20d
SAS		 1279static int dummy_perform_transfer(struct urb *urb, struct dummy_request *req,
1280 u32 len)
1281{
1282 void *ubuf, *rbuf;
14fce33a 1283 struct urbp *urbp = urb->hcpriv;
a04ce20d 1284 int to_host;
14fce33a
SAS		 1285 struct sg_mapping_iter *miter = &urbp->miter;
1286 u32 trans = 0;
1287 u32 this_sg;
1288 bool next_sg;
a04ce20d
SAS		 1289
1290 to_host = usb_pipein(urb->pipe);
1291 rbuf = req->req.buf + req->req.actual;
a04ce20d 1292
14fce33a
SAS		 1293 if (!urb->num_sgs) {
1294 ubuf = urb->transfer_buffer + urb->actual_length;
1295 if (to_host)
1296 memcpy(ubuf, rbuf, len);
1297 else
1298 memcpy(rbuf, ubuf, len);
1299 return len;
1300 }
1301
1302 if (!urbp->miter_started) {
1303 u32 flags = SG_MITER_ATOMIC;
1304
1305 if (to_host)
1306 flags |= SG_MITER_TO_SG;
1307 else
1308 flags |= SG_MITER_FROM_SG;
1309
1310 sg_miter_start(miter, urb->sg, urb->num_sgs, flags);
1311 urbp->miter_started = 1;
1312 }
1313 next_sg = sg_miter_next(miter);
1314 if (next_sg == false) {
1315 WARN_ON_ONCE(1);
1316 return -EINVAL;
1317 }
1318 do {
1319 ubuf = miter->addr;
1320 this_sg = min_t(u32, len, miter->length);
1321 miter->consumed = this_sg;
1322 trans += this_sg;
1323
1324 if (to_host)
1325 memcpy(ubuf, rbuf, this_sg);
1326 else
1327 memcpy(rbuf, ubuf, this_sg);
1328 len -= this_sg;
1329
1330 if (!len)
1331 break;
1332 next_sg = sg_miter_next(miter);
1333 if (next_sg == false) {
1334 WARN_ON_ONCE(1);
1335 return -EINVAL;
1336 }
1337
1338 rbuf += this_sg;
1339 } while (1);
1340
1341 sg_miter_stop(miter);
1342 return trans;
a04ce20d
SAS		 1343}
1344
1da177e4 1345/* transfer up to a frame's worth; caller must own lock */
a54c979f
SAS		 1346static int transfer(struct dummy_hcd *dum_hcd, struct urb *urb,
1347 struct dummy_ep *ep, int limit, int *status)
1da177e4 1348{
a54c979f 1349 struct dummy *dum = dum_hcd->dum;
1da177e4 1350 struct dummy_request *req;
9a9ce1df 1351 int sent = 0;
1da177e4
LT		 1352
1353top:
1354 /* if there's no request queued, the device is NAKing; return */
18f2cbaa 1355 list_for_each_entry(req, &ep->queue, queue) {
1da177e4
LT		 1356 unsigned host_len, dev_len, len;
1357 int is_short, to_host;
1358 int rescan = 0;
1359
a54c979f
SAS		 1360 if (dummy_ep_stream_en(dum_hcd, urb)) {
1361 if ((urb->stream_id != req->req.stream_id))
1362 continue;
1363 }
1364
1da177e4
LT		 1365 /* 1..N packets of ep->ep.maxpacket each ... the last one
1366 * may be short (including zero length).
1367 *
1368 * writer can send a zlp explicitly (length 0) or implicitly
1369 * (length mod maxpacket zero, and 'zero' flag); they always
1370 * terminate reads.
1371 */
1372 host_len = urb->transfer_buffer_length - urb->actual_length;
1373 dev_len = req->req.length - req->req.actual;
18f2cbaa 1374 len = min(host_len, dev_len);
1da177e4
LT		 1375
1376 /* FIXME update emulated data toggle too */
1377
18f2cbaa
SAS		 1378 to_host = usb_pipein(urb->pipe);
1379 if (unlikely(len == 0))
1da177e4
LT		 1380 is_short = 1;
1381 else {
1da177e4
LT		 1382 /* not enough bandwidth left? */
1383 if (limit < ep->ep.maxpacket && limit < len)
1384 break;
18f2cbaa 1385 len = min_t(unsigned, len, limit);
1da177e4
LT		 1386 if (len == 0)
1387 break;
1388
e42bd6a5
IK		 1389 /* send multiple of maxpacket first, then remainder */
1390 if (len >= ep->ep.maxpacket) {
1391 is_short = 0;
1392 if (len % ep->ep.maxpacket)
1393 rescan = 1;
1394 len -= len % ep->ep.maxpacket;
1395 } else {
1396 is_short = 1;
1da177e4 1397 }
1da177e4 1398
a04ce20d
SAS		 1399 len = dummy_perform_transfer(urb, req, len);
1400
1da177e4 1401 ep->last_io = jiffies;
b1443ac0 1402 if ((int)len < 0) {
14fce33a
SAS		 1403 req->req.status = len;
1404 } else {
1405 limit -= len;
9a9ce1df 1406 sent += len;
14fce33a
SAS		 1407 urb->actual_length += len;
1408 req->req.actual += len;
1409 }
1da177e4
LT		 1410 }
1411
1412 /* short packets terminate, maybe with overflow/underflow.
1413 * it's only really an error to write too much.
1414 *
1415 * partially filling a buffer optionally blocks queue advances
1416 * (so completion handlers can clean up the queue) but we don't
b0d9efba 1417 * need to emulate such data-in-flight.
1da177e4
LT		 1418 */
1419 if (is_short) {
1420 if (host_len == dev_len) {
1421 req->req.status = 0;
4d2f110c 1422 *status = 0;
1da177e4
LT		 1423 } else if (to_host) {
1424 req->req.status = 0;
1425 if (dev_len > host_len)
4d2f110c 1426 *status = -EOVERFLOW;
1da177e4 1427 else
4d2f110c 1428 *status = 0;
5dda5be9 1429 } else {
4d2f110c 1430 *status = 0;
1da177e4
LT		 1431 if (host_len > dev_len)
1432 req->req.status = -EOVERFLOW;
1433 else
1434 req->req.status = 0;
1435 }
1436
21c3ee93
IK		 1437 /*
1438 * many requests terminate without a short packet.
1439 * send a zlp if demanded by flags.
1440 */
1da177e4 1441 } else {
21c3ee93
IK		 1442 if (req->req.length == req->req.actual) {
1443 if (req->req.zero && to_host)
1444 rescan = 1;
1445 else
1446 req->req.status = 0;
1447 }
1448 if (urb->transfer_buffer_length == urb->actual_length) {
1449 if (urb->transfer_flags & URB_ZERO_PACKET &&
1450 !to_host)
1451 rescan = 1;
1452 else
1453 *status = 0;
1454 }
1da177e4
LT		 1455 }
1456
1457 /* device side completion --> continuable */
1458 if (req->req.status != -EINPROGRESS) {
18f2cbaa 1459 list_del_init(&req->queue);
1da177e4 1460
18f2cbaa 1461 spin_unlock(&dum->lock);
304f7e5e 1462 usb_gadget_giveback_request(&ep->ep, &req->req);
18f2cbaa 1463 spin_lock(&dum->lock);
1da177e4
LT		 1464
1465 /* requests might have been unlinked... */
1466 rescan = 1;
1467 }
1468
1469 /* host side completion --> terminate */
4d2f110c 1470 if (*status != -EINPROGRESS)
1da177e4
LT		 1471 break;
1472
1473 /* rescan to continue with any other queued i/o */
1474 if (rescan)
1475 goto top;
1476 }
9a9ce1df 1477 return sent;
1da177e4
LT		 1478}
1479
18f2cbaa 1480static int periodic_bytes(struct dummy *dum, struct dummy_ep *ep)
1da177e4
LT		 1481{
1482 int limit = ep->ep.maxpacket;
1483
1484 if (dum->gadget.speed == USB_SPEED_HIGH) {
1485 int tmp;
1486
1487 /* high bandwidth mode */
29cc8897 1488 tmp = usb_endpoint_maxp(ep->desc);
1da177e4
LT		 1489 tmp = (tmp >> 11) & 0x03;
1490 tmp *= 8 /* applies to entire frame */;
1491 limit += limit * tmp;
1492 }
1cd8fd28 1493 if (dum->gadget.speed == USB_SPEED_SUPER) {
59f08e6d 1494 switch (usb_endpoint_type(ep->desc)) {
1cd8fd28
TB		 1495 case USB_ENDPOINT_XFER_ISOC:
1496 /* Sec. 4.4.8.2 USB3.0 Spec */
1497 limit = 3 * 16 * 1024 * 8;
1498 break;
1499 case USB_ENDPOINT_XFER_INT:
1500 /* Sec. 4.4.7.2 USB3.0 Spec */
1501 limit = 3 * 1024 * 8;
1502 break;
1503 case USB_ENDPOINT_XFER_BULK:
1504 default:
1505 break;
1506 }
1507 }
1da177e4
LT		 1508 return limit;
1509}
1510
cdfcbd2c 1511#define is_active(dum_hcd) ((dum_hcd->port_status & \
1da177e4
LT		 1512 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1513 USB_PORT_STAT_SUSPEND)) \
1514 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1515
18f2cbaa 1516static struct dummy_ep *find_endpoint(struct dummy *dum, u8 address)
1da177e4
LT		 1517{
1518 int i;
1519
1cd8fd28
TB		 1520 if (!is_active((dum->gadget.speed == USB_SPEED_SUPER ?
1521 dum->ss_hcd : dum->hs_hcd)))
1da177e4
LT		 1522 return NULL;
1523 if ((address & ~USB_DIR_IN) == 0)
18f2cbaa 1524 return &dum->ep[0];
1da177e4 1525 for (i = 1; i < DUMMY_ENDPOINTS; i++) {
18f2cbaa 1526 struct dummy_ep *ep = &dum->ep[i];
1da177e4
LT		 1527
1528 if (!ep->desc)
1529 continue;
1530 if (ep->desc->bEndpointAddress == address)
1531 return ep;
1532 }
1533 return NULL;
1534}
1535
1536#undef is_active
1537
1538#define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1539#define Dev_InRequest (Dev_Request | USB_DIR_IN)
1540#define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1541#define Intf_InRequest (Intf_Request | USB_DIR_IN)
1542#define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1543#define Ep_InRequest (Ep_Request | USB_DIR_IN)
1544
8be8a9d3
TB		 1545
1546/**
1547 * handle_control_request() - handles all control transfers
1548 * @dum: pointer to dummy (the_controller)
1549 * @urb: the urb request to handle
1550 * @setup: pointer to the setup data for a USB device control
1551 * request
1552 * @status: pointer to request handling status
1553 *
1554 * Return 0 - if the request was handled
1555 * 1 - if the request wasn't handles
1556 * error code on error
1557 */
cdfcbd2c 1558static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb,
8be8a9d3
TB		 1559 struct usb_ctrlrequest *setup,
1560 int *status)
1561{
1562 struct dummy_ep *ep2;
cdfcbd2c 1563 struct dummy *dum = dum_hcd->dum;
8be8a9d3
TB		 1564 int ret_val = 1;
1565 unsigned w_index;
1566 unsigned w_value;
1567
1568 w_index = le16_to_cpu(setup->wIndex);
1569 w_value = le16_to_cpu(setup->wValue);
1570 switch (setup->bRequest) {
1571 case USB_REQ_SET_ADDRESS:
1572 if (setup->bRequestType != Dev_Request)
1573 break;
1574 dum->address = w_value;
1575 *status = 0;
1576 dev_dbg(udc_dev(dum), "set_address = %d\n",
1577 w_value);
1578 ret_val = 0;
1579 break;
1580 case USB_REQ_SET_FEATURE:
1581 if (setup->bRequestType == Dev_Request) {
1582 ret_val = 0;
1583 switch (w_value) {
1584 case USB_DEVICE_REMOTE_WAKEUP:
1585 break;
1586 case USB_DEVICE_B_HNP_ENABLE:
1587 dum->gadget.b_hnp_enable = 1;
1588 break;
1589 case USB_DEVICE_A_HNP_SUPPORT:
1590 dum->gadget.a_hnp_support = 1;
1591 break;
1592 case USB_DEVICE_A_ALT_HNP_SUPPORT:
1593 dum->gadget.a_alt_hnp_support = 1;
1594 break;
1cd8fd28
TB		 1595 case USB_DEVICE_U1_ENABLE:
1596 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1597 HCD_USB3)
1598 w_value = USB_DEV_STAT_U1_ENABLED;
1599 else
1600 ret_val = -EOPNOTSUPP;
1601 break;
1602 case USB_DEVICE_U2_ENABLE:
1603 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1604 HCD_USB3)
1605 w_value = USB_DEV_STAT_U2_ENABLED;
1606 else
1607 ret_val = -EOPNOTSUPP;
1608 break;
1609 case USB_DEVICE_LTM_ENABLE:
1610 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1611 HCD_USB3)
1612 w_value = USB_DEV_STAT_LTM_ENABLED;
1613 else
1614 ret_val = -EOPNOTSUPP;
1615 break;
8be8a9d3
TB		 1616 default:
1617 ret_val = -EOPNOTSUPP;
1618 }
1619 if (ret_val == 0) {
1620 dum->devstatus |= (1 << w_value);
1621 *status = 0;
1622 }
1623 } else if (setup->bRequestType == Ep_Request) {
1624 /* endpoint halt */
1625 ep2 = find_endpoint(dum, w_index);
1626 if (!ep2 || ep2->ep.name == ep0name) {
1627 ret_val = -EOPNOTSUPP;
1628 break;
1629 }
1630 ep2->halted = 1;
1631 ret_val = 0;
1632 *status = 0;
1633 }
1634 break;
1635 case USB_REQ_CLEAR_FEATURE:
1636 if (setup->bRequestType == Dev_Request) {
1637 ret_val = 0;
1638 switch (w_value) {
1639 case USB_DEVICE_REMOTE_WAKEUP:
1640 w_value = USB_DEVICE_REMOTE_WAKEUP;
1641 break;
1cd8fd28
TB		 1642 case USB_DEVICE_U1_ENABLE:
1643 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1644 HCD_USB3)
1645 w_value = USB_DEV_STAT_U1_ENABLED;
1646 else
1647 ret_val = -EOPNOTSUPP;
1648 break;
1649 case USB_DEVICE_U2_ENABLE:
1650 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1651 HCD_USB3)
1652 w_value = USB_DEV_STAT_U2_ENABLED;
1653 else
1654 ret_val = -EOPNOTSUPP;
1655 break;
1656 case USB_DEVICE_LTM_ENABLE:
1657 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1658 HCD_USB3)
1659 w_value = USB_DEV_STAT_LTM_ENABLED;
1660 else
1661 ret_val = -EOPNOTSUPP;
1662 break;
8be8a9d3
TB		 1663 default:
1664 ret_val = -EOPNOTSUPP;
1665 break;
1666 }
1667 if (ret_val == 0) {
1668 dum->devstatus &= ~(1 << w_value);
1669 *status = 0;
1670 }
1671 } else if (setup->bRequestType == Ep_Request) {
1672 /* endpoint halt */
1673 ep2 = find_endpoint(dum, w_index);
1674 if (!ep2) {
1675 ret_val = -EOPNOTSUPP;
1676 break;
1677 }
1678 if (!ep2->wedged)
1679 ep2->halted = 0;
1680 ret_val = 0;
1681 *status = 0;
1682 }
1683 break;
1684 case USB_REQ_GET_STATUS:
1685 if (setup->bRequestType == Dev_InRequest
1686 || setup->bRequestType == Intf_InRequest
1687 || setup->bRequestType == Ep_InRequest) {
1688 char *buf;
1689 /*
1690 * device: remote wakeup, selfpowered
1691 * interface: nothing
1692 * endpoint: halt
1693 */
1694 buf = (char *)urb->transfer_buffer;
1695 if (urb->transfer_buffer_length > 0) {
1696 if (setup->bRequestType == Ep_InRequest) {
1697 ep2 = find_endpoint(dum, w_index);
1698 if (!ep2) {
1699 ret_val = -EOPNOTSUPP;
1700 break;
1701 }
1702 buf[0] = ep2->halted;
1703 } else if (setup->bRequestType ==
1704 Dev_InRequest) {
1705 buf[0] = (u8)dum->devstatus;
1706 } else
1707 buf[0] = 0;
1708 }
1709 if (urb->transfer_buffer_length > 1)
1710 buf[1] = 0;
1711 urb->actual_length = min_t(u32, 2,
1712 urb->transfer_buffer_length);
1713 ret_val = 0;
1714 *status = 0;
1715 }
1716 break;
1717 }
1718 return ret_val;
1719}
1720
1da177e4
LT		 1721/* drive both sides of the transfers; looks like irq handlers to
1722 * both drivers except the callbacks aren't in_irq().
1723 */
cdfcbd2c 1724static void dummy_timer(unsigned long _dum_hcd)
1da177e4 1725{
cdfcbd2c
TB		 1726 struct dummy_hcd *dum_hcd = (struct dummy_hcd *) _dum_hcd;
1727 struct dummy *dum = dum_hcd->dum;
1da177e4
LT		 1728 struct urbp *urbp, *tmp;
1729 unsigned long flags;
1730 int limit, total;
1731 int i;
1732
1733 /* simplistic model for one frame's bandwidth */
1734 switch (dum->gadget.speed) {
1735 case USB_SPEED_LOW:
1736 total = 8/*bytes*/ * 12/*packets*/;
1737 break;
1738 case USB_SPEED_FULL:
1739 total = 64/*bytes*/ * 19/*packets*/;
1740 break;
1741 case USB_SPEED_HIGH:
1742 total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1743 break;
1cd8fd28
TB		 1744 case USB_SPEED_SUPER:
1745 /* Bus speed is 500000 bytes/ms, so use a little less */
1746 total = 490000;
1747 break;
1da177e4 1748 default:
cdfcbd2c 1749 dev_err(dummy_dev(dum_hcd), "bogus device speed\n");
1da177e4
LT		 1750 return;
1751 }
1752
1753 /* FIXME if HZ != 1000 this will probably misbehave ... */
1754
1755 /* look at each urb queued by the host side driver */
18f2cbaa 1756 spin_lock_irqsave(&dum->lock, flags);
1da177e4 1757
cdfcbd2c
TB		 1758 if (!dum_hcd->udev) {
1759 dev_err(dummy_dev(dum_hcd),
1da177e4 1760 "timer fired with no URBs pending?\n");
18f2cbaa 1761 spin_unlock_irqrestore(&dum->lock, flags);
1da177e4
LT		 1762 return;
1763 }
1764
1765 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
7a3b8e70 1766 if (!ep_info[i].name)
1da177e4 1767 break;
18f2cbaa 1768 dum->ep[i].already_seen = 0;
1da177e4
LT		 1769 }
1770
1771restart:
cdfcbd2c 1772 list_for_each_entry_safe(urbp, tmp, &dum_hcd->urbp_list, urbp_list) {
1da177e4
LT		 1773 struct urb *urb;
1774 struct dummy_request *req;
1775 u8 address;
1776 struct dummy_ep *ep = NULL;
1777 int type;
4d2f110c 1778 int status = -EINPROGRESS;
1da177e4
LT		 1779
1780 urb = urbp->urb;
eb231054 1781 if (urb->unlinked)
1da177e4 1782 goto return_urb;
cdfcbd2c 1783 else if (dum_hcd->rh_state != DUMMY_RH_RUNNING)
391eca9d 1784 continue;
18f2cbaa 1785 type = usb_pipetype(urb->pipe);
1da177e4
LT		 1786
1787 /* used up this frame's non-periodic bandwidth?
1788 * FIXME there's infinite bandwidth for control and
1789 * periodic transfers ... unrealistic.
1790 */
1791 if (total <= 0 && type == PIPE_BULK)
1792 continue;
1793
1794 /* find the gadget's ep for this request (if configured) */
1795 address = usb_pipeendpoint (urb->pipe);
18f2cbaa 1796 if (usb_pipein(urb->pipe))
1da177e4
LT		 1797 address |= USB_DIR_IN;
1798 ep = find_endpoint(dum, address);
1799 if (!ep) {
1800 /* set_configuration() disagreement */
cdfcbd2c 1801 dev_dbg(dummy_dev(dum_hcd),
1da177e4
LT		 1802 "no ep configured for urb %p\n",
1803 urb);
4d2f110c 1804 status = -EPROTO;
1da177e4
LT		 1805 goto return_urb;
1806 }
1807
1808 if (ep->already_seen)
1809 continue;
1810 ep->already_seen = 1;
18f2cbaa 1811 if (ep == &dum->ep[0] && urb->error_count) {
1da177e4
LT		 1812 ep->setup_stage = 1; /* a new urb */
1813 urb->error_count = 0;
1814 }
1815 if (ep->halted && !ep->setup_stage) {
1816 /* NOTE: must not be iso! */
cdfcbd2c 1817 dev_dbg(dummy_dev(dum_hcd), "ep %s halted, urb %p\n",
1da177e4 1818 ep->ep.name, urb);
4d2f110c 1819 status = -EPIPE;
1da177e4
LT		 1820 goto return_urb;
1821 }
1822 /* FIXME make sure both ends agree on maxpacket */
1823
1824 /* handle control requests */
18f2cbaa 1825 if (ep == &dum->ep[0] && ep->setup_stage) {
1da177e4
LT		 1826 struct usb_ctrlrequest setup;
1827 int value = 1;
1da177e4 1828
18f2cbaa 1829 setup = *(struct usb_ctrlrequest *) urb->setup_packet;
1da177e4 1830 /* paranoia, in case of stale queued data */
18f2cbaa
SAS		 1831 list_for_each_entry(req, &ep->queue, queue) {
1832 list_del_init(&req->queue);
1da177e4 1833 req->req.status = -EOVERFLOW;
18f2cbaa 1834 dev_dbg(udc_dev(dum), "stale req = %p\n",
1da177e4
LT		 1835 req);
1836
18f2cbaa 1837 spin_unlock(&dum->lock);
304f7e5e 1838 usb_gadget_giveback_request(&ep->ep, &req->req);
18f2cbaa 1839 spin_lock(&dum->lock);
1da177e4
LT		 1840 ep->already_seen = 0;
1841 goto restart;
1842 }
1843
1844 /* gadget driver never sees set_address or operations
1845 * on standard feature flags. some hardware doesn't
1846 * even expose them.
1847 */
1848 ep->last_io = jiffies;
1849 ep->setup_stage = 0;
1850 ep->halted = 0;
1da177e4 1851
cdfcbd2c 1852 value = handle_control_request(dum_hcd, urb, &setup,
8be8a9d3 1853 &status);
1da177e4
LT		 1854
1855 /* gadget driver handles all other requests. block
1856 * until setup() returns; no reentrancy issues etc.
1857 */
1858 if (value > 0) {
18f2cbaa
SAS		 1859 spin_unlock(&dum->lock);
1860 value = dum->driver->setup(&dum->gadget,
1da177e4 1861 &setup);
18f2cbaa 1862 spin_lock(&dum->lock);
1da177e4
LT		 1863
1864 if (value >= 0) {
1865 /* no delays (max 64KB data stage) */
1866 limit = 64*1024;
1867 goto treat_control_like_bulk;
1868 }
1869 /* error, see below */
1870 }
1871
1872 if (value < 0) {
1873 if (value != -EOPNOTSUPP)
18f2cbaa 1874 dev_dbg(udc_dev(dum),
1da177e4
LT		 1875 "setup --> %d\n",
1876 value);
4d2f110c 1877 status = -EPIPE;
1da177e4
LT		 1878 urb->actual_length = 0;
1879 }
1880
1881 goto return_urb;
1882 }
1883
1884 /* non-control requests */
1885 limit = total;
18f2cbaa 1886 switch (usb_pipetype(urb->pipe)) {
1da177e4
LT		 1887 case PIPE_ISOCHRONOUS:
1888 /* FIXME is it urb->interval since the last xfer?
1889 * use urb->iso_frame_desc[i].
1890 * complete whether or not ep has requests queued.
1891 * report random errors, to debug drivers.
1892 */
18f2cbaa 1893 limit = max(limit, periodic_bytes(dum, ep));
4d2f110c 1894 status = -ENOSYS;
1da177e4
LT		 1895 break;
1896
1897 case PIPE_INTERRUPT:
1898 /* FIXME is it urb->interval since the last xfer?
1899 * this almost certainly polls too fast.
1900 */
18f2cbaa 1901 limit = max(limit, periodic_bytes(dum, ep));
1da177e4
LT		 1902 /* FALLTHROUGH */
1903
1da177e4 1904 default:
18f2cbaa 1905treat_control_like_bulk:
1da177e4 1906 ep->last_io = jiffies;
9a9ce1df 1907 total -= transfer(dum_hcd, urb, ep, limit, &status);
1da177e4
LT		 1908 break;
1909 }
1910
1911 /* incomplete transfer? */
4d2f110c 1912 if (status == -EINPROGRESS)
1da177e4
LT		 1913 continue;
1914
1915return_urb:
18f2cbaa
SAS		 1916 list_del(&urbp->urbp_list);
1917 kfree(urbp);
1da177e4
LT		 1918 if (ep)
1919 ep->already_seen = ep->setup_stage = 0;
1920
cdfcbd2c 1921 usb_hcd_unlink_urb_from_ep(dummy_hcd_to_hcd(dum_hcd), urb);
18f2cbaa 1922 spin_unlock(&dum->lock);
cdfcbd2c 1923 usb_hcd_giveback_urb(dummy_hcd_to_hcd(dum_hcd), urb, status);
18f2cbaa 1924 spin_lock(&dum->lock);
1da177e4
LT		 1925
1926 goto restart;
1927 }
1928
cdfcbd2c
TB		 1929 if (list_empty(&dum_hcd->urbp_list)) {
1930 usb_put_dev(dum_hcd->udev);
1931 dum_hcd->udev = NULL;
1932 } else if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
391eca9d 1933 /* want a 1 msec delay here */
cdfcbd2c 1934 mod_timer(&dum_hcd->timer, jiffies + msecs_to_jiffies(1));
1da177e4
LT		 1935 }
1936
18f2cbaa 1937 spin_unlock_irqrestore(&dum->lock, flags);
1da177e4
LT		 1938}
1939
1940/*-------------------------------------------------------------------------*/
1941
1942#define PORT_C_MASK \
c2db8b5e
AS		 1943 ((USB_PORT_STAT_C_CONNECTION \
1944 | USB_PORT_STAT_C_ENABLE \
1945 | USB_PORT_STAT_C_SUSPEND \
1946 | USB_PORT_STAT_C_OVERCURRENT \
1947 | USB_PORT_STAT_C_RESET) << 16)
1da177e4 1948
18f2cbaa 1949static int dummy_hub_status(struct usb_hcd *hcd, char *buf)
1da177e4 1950{
cdfcbd2c 1951 struct dummy_hcd *dum_hcd;
1da177e4 1952 unsigned long flags;
391eca9d 1953 int retval = 0;
1da177e4 1954
cdfcbd2c 1955 dum_hcd = hcd_to_dummy_hcd(hcd);
1da177e4 1956
cdfcbd2c 1957 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
541c7d43 1958 if (!HCD_HW_ACCESSIBLE(hcd))
391eca9d 1959 goto done;
f1c39fad 1960
cdfcbd2c
TB		 1961 if (dum_hcd->resuming && time_after_eq(jiffies, dum_hcd->re_timeout)) {
1962 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1963 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
1964 set_link_state(dum_hcd);
f1c39fad
AS		 1965 }
1966
cdfcbd2c 1967 if ((dum_hcd->port_status & PORT_C_MASK) != 0) {
1da177e4 1968 *buf = (1 << 1);
cdfcbd2c
TB		 1969 dev_dbg(dummy_dev(dum_hcd), "port status 0x%08x has changes\n",
1970 dum_hcd->port_status);
1da177e4 1971 retval = 1;
cdfcbd2c 1972 if (dum_hcd->rh_state == DUMMY_RH_SUSPENDED)
18f2cbaa 1973 usb_hcd_resume_root_hub(hcd);
1da177e4 1974 }
391eca9d 1975done:
cdfcbd2c 1976 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1da177e4
LT		 1977 return retval;
1978}
1979
3b9c1c5b 1980/* usb 3.0 root hub device descriptor */
814cf212 1981static struct {
3b9c1c5b
SAS		 1982 struct usb_bos_descriptor bos;
1983 struct usb_ss_cap_descriptor ss_cap;
1984} __packed usb3_bos_desc = {
1985
1986 .bos = {
1987 .bLength = USB_DT_BOS_SIZE,
1988 .bDescriptorType = USB_DT_BOS,
1989 .wTotalLength = cpu_to_le16(sizeof(usb3_bos_desc)),
1990 .bNumDeviceCaps = 1,
1991 },
1992 .ss_cap = {
1993 .bLength = USB_DT_USB_SS_CAP_SIZE,
1994 .bDescriptorType = USB_DT_DEVICE_CAPABILITY,
1995 .bDevCapabilityType = USB_SS_CAP_TYPE,
1996 .wSpeedSupported = cpu_to_le16(USB_5GBPS_OPERATION),
1997 .bFunctionalitySupport = ilog2(USB_5GBPS_OPERATION),
1998 },
1999};
2000
1cd8fd28
TB		 2001static inline void
2002ss_hub_descriptor(struct usb_hub_descriptor *desc)
2003{
2004 memset(desc, 0, sizeof *desc);
2569ffd5 2005 desc->bDescriptorType = USB_DT_SS_HUB;
1cd8fd28 2006 desc->bDescLength = 12;
d906d61c
SS		 2007 desc->wHubCharacteristics = cpu_to_le16(
2008 HUB_CHAR_INDV_PORT_LPSM |
2009 HUB_CHAR_COMMON_OCPM);
1cd8fd28
TB		 2010 desc->bNbrPorts = 1;
2011 desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/
2012 desc->u.ss.DeviceRemovable = 0xffff;
2013}
2014
18f2cbaa 2015static inline void hub_descriptor(struct usb_hub_descriptor *desc)
1da177e4 2016{
18f2cbaa 2017 memset(desc, 0, sizeof *desc);
2569ffd5 2018 desc->bDescriptorType = USB_DT_HUB;
1da177e4 2019 desc->bDescLength = 9;
d906d61c
SS		 2020 desc->wHubCharacteristics = cpu_to_le16(
2021 HUB_CHAR_INDV_PORT_LPSM |
2022 HUB_CHAR_COMMON_OCPM);
1da177e4 2023 desc->bNbrPorts = 1;
dbe79bbe
JY		 2024 desc->u.hs.DeviceRemovable[0] = 0xff;
2025 desc->u.hs.DeviceRemovable[1] = 0xff;
1da177e4
LT		 2026}
2027
18f2cbaa 2028static int dummy_hub_control(
1da177e4
LT		 2029 struct usb_hcd *hcd,
2030 u16 typeReq,
2031 u16 wValue,
2032 u16 wIndex,
2033 char *buf,
2034 u16 wLength
2035) {
cdfcbd2c 2036 struct dummy_hcd *dum_hcd;
1da177e4
LT		 2037 int retval = 0;
2038 unsigned long flags;
2039
541c7d43 2040 if (!HCD_HW_ACCESSIBLE(hcd))
391eca9d
AS		 2041 return -ETIMEDOUT;
2042
cdfcbd2c
TB		 2043 dum_hcd = hcd_to_dummy_hcd(hcd);
2044
2045 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
1da177e4
LT		 2046 switch (typeReq) {
2047 case ClearHubFeature:
2048 break;
2049 case ClearPortFeature:
2050 switch (wValue) {
2051 case USB_PORT_FEAT_SUSPEND:
1cd8fd28
TB		 2052 if (hcd->speed == HCD_USB3) {
2053 dev_dbg(dummy_dev(dum_hcd),
2054 "USB_PORT_FEAT_SUSPEND req not "
2055 "supported for USB 3.0 roothub\n");
2056 goto error;
2057 }
cdfcbd2c 2058 if (dum_hcd->port_status & USB_PORT_STAT_SUSPEND) {
1da177e4 2059 /* 20msec resume signaling */
cdfcbd2c
TB		 2060 dum_hcd->resuming = 1;
2061 dum_hcd->re_timeout = jiffies +
f1c39fad 2062 msecs_to_jiffies(20);
1da177e4
LT		 2063 }
2064 break;
2065 case USB_PORT_FEAT_POWER:
1cd8fd28
TB		 2066 if (hcd->speed == HCD_USB3) {
2067 if (dum_hcd->port_status & USB_PORT_STAT_POWER)
2068 dev_dbg(dummy_dev(dum_hcd),
2069 "power-off\n");
2070 } else
2071 if (dum_hcd->port_status &
2072 USB_SS_PORT_STAT_POWER)
2073 dev_dbg(dummy_dev(dum_hcd),
2074 "power-off\n");
f1c39fad 2075 /* FALLS THROUGH */
1da177e4 2076 default:
cdfcbd2c
TB		 2077 dum_hcd->port_status &= ~(1 << wValue);
2078 set_link_state(dum_hcd);
1da177e4
LT		 2079 }
2080 break;
2081 case GetHubDescriptor:
1cd8fd28
TB		 2082 if (hcd->speed == HCD_USB3 &&
2083 (wLength < USB_DT_SS_HUB_SIZE ||
2084 wValue != (USB_DT_SS_HUB << 8))) {
2085 dev_dbg(dummy_dev(dum_hcd),
2086 "Wrong hub descriptor type for "
2087 "USB 3.0 roothub.\n");
2088 goto error;
2089 }
2090 if (hcd->speed == HCD_USB3)
2091 ss_hub_descriptor((struct usb_hub_descriptor *) buf);
2092 else
2093 hub_descriptor((struct usb_hub_descriptor *) buf);
1da177e4 2094 break;
3b9c1c5b
SAS		 2095
2096 case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
2097 if (hcd->speed != HCD_USB3)
2098 goto error;
2099
2100 if ((wValue >> 8) != USB_DT_BOS)
2101 goto error;
2102
2103 memcpy(buf, &usb3_bos_desc, sizeof(usb3_bos_desc));
2104 retval = sizeof(usb3_bos_desc);
2105 break;
2106
1da177e4 2107 case GetHubStatus:
18f2cbaa 2108 *(__le32 *) buf = cpu_to_le32(0);
1da177e4
LT		 2109 break;
2110 case GetPortStatus:
2111 if (wIndex != 1)
2112 retval = -EPIPE;
2113
2114 /* whoever resets or resumes must GetPortStatus to
2115 * complete it!!
2116 */
cdfcbd2c
TB		 2117 if (dum_hcd->resuming &&
2118 time_after_eq(jiffies, dum_hcd->re_timeout)) {
2119 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
2120 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
1da177e4 2121 }
cdfcbd2c
TB		 2122 if ((dum_hcd->port_status & USB_PORT_STAT_RESET) != 0 &&
2123 time_after_eq(jiffies, dum_hcd->re_timeout)) {
2124 dum_hcd->port_status |= (USB_PORT_STAT_C_RESET << 16);
2125 dum_hcd->port_status &= ~USB_PORT_STAT_RESET;
2126 if (dum_hcd->dum->pullup) {
2127 dum_hcd->port_status |= USB_PORT_STAT_ENABLE;
1cd8fd28
TB		 2128
2129 if (hcd->speed < HCD_USB3) {
2130 switch (dum_hcd->dum->gadget.speed) {
2131 case USB_SPEED_HIGH:
2132 dum_hcd->port_status |=
2133 USB_PORT_STAT_HIGH_SPEED;
2134 break;
2135 case USB_SPEED_LOW:
2136 dum_hcd->dum->gadget.ep0->
2137 maxpacket = 8;
2138 dum_hcd->port_status |=
2139 USB_PORT_STAT_LOW_SPEED;
2140 break;
2141 default:
2142 dum_hcd->dum->gadget.speed =
2143 USB_SPEED_FULL;
2144 break;
2145 }
1da177e4
LT		 2146 }
2147 }
2148 }
cdfcbd2c 2149 set_link_state(dum_hcd);
18f2cbaa
SAS		 2150 ((__le16 *) buf)[0] = cpu_to_le16(dum_hcd->port_status);
2151 ((__le16 *) buf)[1] = cpu_to_le16(dum_hcd->port_status >> 16);
1da177e4
LT		 2152 break;
2153 case SetHubFeature:
2154 retval = -EPIPE;
2155 break;
2156 case SetPortFeature:
2157 switch (wValue) {
1cd8fd28
TB		 2158 case USB_PORT_FEAT_LINK_STATE:
2159 if (hcd->speed != HCD_USB3) {
2160 dev_dbg(dummy_dev(dum_hcd),
2161 "USB_PORT_FEAT_LINK_STATE req not "
2162 "supported for USB 2.0 roothub\n");
2163 goto error;
2164 }
2165 /*
2166 * Since this is dummy we don't have an actual link so
2167 * there is nothing to do for the SET_LINK_STATE cmd
2168 */
2169 break;
2170 case USB_PORT_FEAT_U1_TIMEOUT:
2171 case USB_PORT_FEAT_U2_TIMEOUT:
2172 /* TODO: add suspend/resume support! */
2173 if (hcd->speed != HCD_USB3) {
2174 dev_dbg(dummy_dev(dum_hcd),
2175 "USB_PORT_FEAT_U1/2_TIMEOUT req not "
2176 "supported for USB 2.0 roothub\n");
2177 goto error;
2178 }
2179 break;
1da177e4 2180 case USB_PORT_FEAT_SUSPEND:
1cd8fd28
TB		 2181 /* Applicable only for USB2.0 hub */
2182 if (hcd->speed == HCD_USB3) {
2183 dev_dbg(dummy_dev(dum_hcd),
2184 "USB_PORT_FEAT_SUSPEND req not "
2185 "supported for USB 3.0 roothub\n");
2186 goto error;
2187 }
cdfcbd2c
TB		 2188 if (dum_hcd->active) {
2189 dum_hcd->port_status |= USB_PORT_STAT_SUSPEND;
f1c39fad
AS		 2190
2191 /* HNP would happen here; for now we
2192 * assume b_bus_req is always true.
2193 */
cdfcbd2c 2194 set_link_state(dum_hcd);
f1c39fad 2195 if (((1 << USB_DEVICE_B_HNP_ENABLE)
cdfcbd2c
TB		 2196 & dum_hcd->dum->devstatus) != 0)
2197 dev_dbg(dummy_dev(dum_hcd),
5742b0c9 2198 "no HNP yet!\n");
1da177e4
LT		 2199 }
2200 break;
f1c39fad 2201 case USB_PORT_FEAT_POWER:
1cd8fd28
TB		 2202 if (hcd->speed == HCD_USB3)
2203 dum_hcd->port_status |= USB_SS_PORT_STAT_POWER;
2204 else
2205 dum_hcd->port_status |= USB_PORT_STAT_POWER;
cdfcbd2c 2206 set_link_state(dum_hcd);
f1c39fad 2207 break;
1cd8fd28
TB		 2208 case USB_PORT_FEAT_BH_PORT_RESET:
2209 /* Applicable only for USB3.0 hub */
2210 if (hcd->speed != HCD_USB3) {
2211 dev_dbg(dummy_dev(dum_hcd),
2212 "USB_PORT_FEAT_BH_PORT_RESET req not "
2213 "supported for USB 2.0 roothub\n");
2214 goto error;
2215 }
2216 /* FALLS THROUGH */
1da177e4 2217 case USB_PORT_FEAT_RESET:
f1c39fad 2218 /* if it's already enabled, disable */
1cd8fd28
TB		 2219 if (hcd->speed == HCD_USB3) {
2220 dum_hcd->port_status = 0;
2221 dum_hcd->port_status =
2222 (USB_SS_PORT_STAT_POWER |
2223 USB_PORT_STAT_CONNECTION |
2224 USB_PORT_STAT_RESET);
2225 } else
2226 dum_hcd->port_status &= ~(USB_PORT_STAT_ENABLE
f1c39fad
AS		 2227 | USB_PORT_STAT_LOW_SPEED
2228 | USB_PORT_STAT_HIGH_SPEED);
cdfcbd2c
TB		 2229 /*
2230 * We want to reset device status. All but the
2231 * Self powered feature
2232 */
2233 dum_hcd->dum->devstatus &=
2234 (1 << USB_DEVICE_SELF_POWERED);
1cd8fd28
TB		 2235 /*
2236 * FIXME USB3.0: what is the correct reset signaling
2237 * interval? Is it still 50msec as for HS?
2238 */
cdfcbd2c 2239 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50);
f1c39fad 2240 /* FALLS THROUGH */
1da177e4 2241 default:
1cd8fd28
TB		 2242 if (hcd->speed == HCD_USB3) {
2243 if ((dum_hcd->port_status &
2244 USB_SS_PORT_STAT_POWER) != 0) {
2245 dum_hcd->port_status |= (1 << wValue);
2246 set_link_state(dum_hcd);
2247 }
2248 } else
2249 if ((dum_hcd->port_status &
2250 USB_PORT_STAT_POWER) != 0) {
2251 dum_hcd->port_status |= (1 << wValue);
2252 set_link_state(dum_hcd);
2253 }
2254 }
2255 break;
2256 case GetPortErrorCount:
2257 if (hcd->speed != HCD_USB3) {
2258 dev_dbg(dummy_dev(dum_hcd),
2259 "GetPortErrorCount req not "
2260 "supported for USB 2.0 roothub\n");
2261 goto error;
2262 }
2263 /* We'll always return 0 since this is a dummy hub */
2264 *(__le32 *) buf = cpu_to_le32(0);
2265 break;
2266 case SetHubDepth:
2267 if (hcd->speed != HCD_USB3) {
2268 dev_dbg(dummy_dev(dum_hcd),
2269 "SetHubDepth req not supported for "
2270 "USB 2.0 roothub\n");
2271 goto error;
1da177e4
LT		 2272 }
2273 break;
1da177e4 2274 default:
cdfcbd2c 2275 dev_dbg(dummy_dev(dum_hcd),
1da177e4
LT		 2276 "hub control req%04x v%04x i%04x l%d\n",
2277 typeReq, wValue, wIndex, wLength);
1cd8fd28 2278error:
1da177e4
LT		 2279 /* "protocol stall" on error */
2280 retval = -EPIPE;
2281 }
cdfcbd2c 2282 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
685eb93f 2283
cdfcbd2c 2284 if ((dum_hcd->port_status & PORT_C_MASK) != 0)
18f2cbaa 2285 usb_hcd_poll_rh_status(hcd);
1da177e4
LT		 2286 return retval;
2287}
2288
18f2cbaa 2289static int dummy_bus_suspend(struct usb_hcd *hcd)
391eca9d 2290{
cdfcbd2c 2291 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
391eca9d 2292
18f2cbaa 2293 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
3cf0a22e 2294
cdfcbd2c
TB		 2295 spin_lock_irq(&dum_hcd->dum->lock);
2296 dum_hcd->rh_state = DUMMY_RH_SUSPENDED;
2297 set_link_state(dum_hcd);
3cf0a22e 2298 hcd->state = HC_STATE_SUSPENDED;
cdfcbd2c 2299 spin_unlock_irq(&dum_hcd->dum->lock);
391eca9d
AS		 2300 return 0;
2301}
2302
18f2cbaa 2303static int dummy_bus_resume(struct usb_hcd *hcd)
391eca9d 2304{
cdfcbd2c 2305 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
3cf0a22e
AS		 2306 int rc = 0;
2307
18f2cbaa 2308 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
391eca9d 2309
cdfcbd2c 2310 spin_lock_irq(&dum_hcd->dum->lock);
541c7d43 2311 if (!HCD_HW_ACCESSIBLE(hcd)) {
cfa59dab 2312 rc = -ESHUTDOWN;
3cf0a22e 2313 } else {
cdfcbd2c
TB		 2314 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2315 set_link_state(dum_hcd);
2316 if (!list_empty(&dum_hcd->urbp_list))
2317 mod_timer(&dum_hcd->timer, jiffies);
3cf0a22e
AS		 2318 hcd->state = HC_STATE_RUNNING;
2319 }
cdfcbd2c 2320 spin_unlock_irq(&dum_hcd->dum->lock);
3cf0a22e 2321 return rc;
391eca9d 2322}
1da177e4
LT		 2323
2324/*-------------------------------------------------------------------------*/
2325
18f2cbaa 2326static inline ssize_t show_urb(char *buf, size_t size, struct urb *urb)
1da177e4 2327{
18f2cbaa 2328 int ep = usb_pipeendpoint(urb->pipe);
1da177e4 2329
18f2cbaa 2330 return snprintf(buf, size,
1da177e4
LT		 2331 "urb/%p %s ep%d%s%s len %d/%d\n",
2332 urb,
2333 ({ char *s;
18f2cbaa
SAS		 2334 switch (urb->dev->speed) {
2335 case USB_SPEED_LOW:
7c884fe4
TB		 2336 s = "ls";
2337 break;
18f2cbaa 2338 case USB_SPEED_FULL:
7c884fe4
TB		 2339 s = "fs";
2340 break;
18f2cbaa 2341 case USB_SPEED_HIGH:
7c884fe4
TB		 2342 s = "hs";
2343 break;
18f2cbaa 2344 case USB_SPEED_SUPER:
1cd8fd28
TB		 2345 s = "ss";
2346 break;
18f2cbaa 2347 default:
7c884fe4
TB		 2348 s = "?";
2349 break;
2b84f92b 2350 } s; }),
18f2cbaa 2351 ep, ep ? (usb_pipein(urb->pipe) ? "in" : "out") : "",
1da177e4 2352 ({ char *s; \
18f2cbaa
SAS		 2353 switch (usb_pipetype(urb->pipe)) { \
2354 case PIPE_CONTROL: \
7c884fe4
TB		 2355 s = ""; \
2356 break; \
18f2cbaa 2357 case PIPE_BULK: \
7c884fe4
TB		 2358 s = "-bulk"; \
2359 break; \
18f2cbaa 2360 case PIPE_INTERRUPT: \
7c884fe4
TB		 2361 s = "-int"; \
2362 break; \
18f2cbaa 2363 default: \
7c884fe4
TB		 2364 s = "-iso"; \
2365 break; \
2b84f92b 2366 } s; }),
1da177e4
LT		 2367 urb->actual_length, urb->transfer_buffer_length);
2368}
2369
ce26bd23 2370static ssize_t urbs_show(struct device *dev, struct device_attribute *attr,
18f2cbaa 2371 char *buf)
1da177e4 2372{
18f2cbaa 2373 struct usb_hcd *hcd = dev_get_drvdata(dev);
cdfcbd2c 2374 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
1da177e4
LT		 2375 struct urbp *urbp;
2376 size_t size = 0;
2377 unsigned long flags;
2378
cdfcbd2c
TB		 2379 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2380 list_for_each_entry(urbp, &dum_hcd->urbp_list, urbp_list) {
1da177e4
LT		 2381 size_t temp;
2382
18f2cbaa 2383 temp = show_urb(buf, PAGE_SIZE - size, urbp->urb);
1da177e4
LT		 2384 buf += temp;
2385 size += temp;
2386 }
cdfcbd2c 2387 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
1da177e4
LT		 2388
2389 return size;
2390}
ce26bd23 2391static DEVICE_ATTR_RO(urbs);
1da177e4 2392
1cd8fd28
TB		 2393static int dummy_start_ss(struct dummy_hcd *dum_hcd)
2394{
2395 init_timer(&dum_hcd->timer);
2396 dum_hcd->timer.function = dummy_timer;
2397 dum_hcd->timer.data = (unsigned long)dum_hcd;
2398 dum_hcd->rh_state = DUMMY_RH_RUNNING;
a54c979f 2399 dum_hcd->stream_en_ep = 0;
1cd8fd28
TB		 2400 INIT_LIST_HEAD(&dum_hcd->urbp_list);
2401 dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET;
2402 dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING;
2403 dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1;
2404#ifdef CONFIG_USB_OTG
2405 dummy_hcd_to_hcd(dum_hcd)->self.otg_port = 1;
2406#endif
2407 return 0;
2408
2409 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
2410 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
2411}
2412
cdfcbd2c 2413static int dummy_start(struct usb_hcd *hcd)
1da177e4 2414{
cdfcbd2c 2415 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
1da177e4
LT		 2416
2417 /*
2418 * MASTER side init ... we emulate a root hub that'll only ever
2419 * talk to one device (the slave side). Also appears in sysfs,
2420 * just like more familiar pci-based HCDs.
2421 */
1cd8fd28
TB		 2422 if (!usb_hcd_is_primary_hcd(hcd))
2423 return dummy_start_ss(dum_hcd);
2424
cdfcbd2c
TB		 2425 spin_lock_init(&dum_hcd->dum->lock);
2426 init_timer(&dum_hcd->timer);
2427 dum_hcd->timer.function = dummy_timer;
2428 dum_hcd->timer.data = (unsigned long)dum_hcd;
2429 dum_hcd->rh_state = DUMMY_RH_RUNNING;
1da177e4 2430
cdfcbd2c 2431 INIT_LIST_HEAD(&dum_hcd->urbp_list);
1da177e4 2432
caf29f62 2433 hcd->power_budget = POWER_BUDGET;
1da177e4 2434 hcd->state = HC_STATE_RUNNING;
685eb93f 2435 hcd->uses_new_polling = 1;
1da177e4 2436
5742b0c9
AS		 2437#ifdef CONFIG_USB_OTG
2438 hcd->self.otg_port = 1;
2439#endif
2440
1da177e4 2441 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
cdfcbd2c 2442 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
1da177e4
LT		 2443}
2444
18f2cbaa 2445static void dummy_stop(struct usb_hcd *hcd)
1da177e4
LT		 2446{
2447 struct dummy *dum;
2448
18f2cbaa 2449 dum = hcd_to_dummy_hcd(hcd)->dum;
cdfcbd2c 2450 device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs);
cdfcbd2c 2451 dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n");
1da177e4
LT		 2452}
2453
2454/*-------------------------------------------------------------------------*/
2455
18f2cbaa 2456static int dummy_h_get_frame(struct usb_hcd *hcd)
1da177e4 2457{
18f2cbaa 2458 return dummy_g_get_frame(NULL);
1da177e4
LT		 2459}
2460
cdfcbd2c
TB		 2461static int dummy_setup(struct usb_hcd *hcd)
2462{
b100a2f3
SAS		 2463 struct dummy *dum;
2464
2465 dum = *((void **)dev_get_platdata(hcd->self.controller));
14fce33a 2466 hcd->self.sg_tablesize = ~0;
cdfcbd2c 2467 if (usb_hcd_is_primary_hcd(hcd)) {
b100a2f3
SAS		 2468 dum->hs_hcd = hcd_to_dummy_hcd(hcd);
2469 dum->hs_hcd->dum = dum;
1cd8fd28
TB		 2470 /*
2471 * Mark the first roothub as being USB 2.0.
2472 * The USB 3.0 roothub will be registered later by
2473 * dummy_hcd_probe()
2474 */
cdfcbd2c
TB		 2475 hcd->speed = HCD_USB2;
2476 hcd->self.root_hub->speed = USB_SPEED_HIGH;
1cd8fd28 2477 } else {
b100a2f3
SAS		 2478 dum->ss_hcd = hcd_to_dummy_hcd(hcd);
2479 dum->ss_hcd->dum = dum;
1cd8fd28
TB		 2480 hcd->speed = HCD_USB3;
2481 hcd->self.root_hub->speed = USB_SPEED_SUPER;
cdfcbd2c
TB		 2482 }
2483 return 0;
2484}
2485
1cd8fd28 2486/* Change a group of bulk endpoints to support multiple stream IDs */
d81f3e4f 2487static int dummy_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev,
1cd8fd28
TB		 2488 struct usb_host_endpoint **eps, unsigned int num_eps,
2489 unsigned int num_streams, gfp_t mem_flags)
2490{
a54c979f
SAS		 2491 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2492 unsigned long flags;
2493 int max_stream;
2494 int ret_streams = num_streams;
2495 unsigned int index;
2496 unsigned int i;
2497
2498 if (!num_eps)
2499 return -EINVAL;
2500
2501 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2502 for (i = 0; i < num_eps; i++) {
2503 index = dummy_get_ep_idx(&eps[i]->desc);
2504 if ((1 << index) & dum_hcd->stream_en_ep) {
2505 ret_streams = -EINVAL;
2506 goto out;
2507 }
2508 max_stream = usb_ss_max_streams(&eps[i]->ss_ep_comp);
2509 if (!max_stream) {
2510 ret_streams = -EINVAL;
2511 goto out;
2512 }
2513 if (max_stream < ret_streams) {
2514 dev_dbg(dummy_dev(dum_hcd), "Ep 0x%x only supports %u "
2515 "stream IDs.\n",
2516 eps[i]->desc.bEndpointAddress,
2517 max_stream);
2518 ret_streams = max_stream;
2519 }
2520 }
2521
2522 for (i = 0; i < num_eps; i++) {
2523 index = dummy_get_ep_idx(&eps[i]->desc);
2524 dum_hcd->stream_en_ep |= 1 << index;
2525 set_max_streams_for_pipe(dum_hcd,
2526 usb_endpoint_num(&eps[i]->desc), ret_streams);
2527 }
2528out:
2529 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2530 return ret_streams;
1cd8fd28
TB		 2531}
2532
2533/* Reverts a group of bulk endpoints back to not using stream IDs. */
d81f3e4f 2534static int dummy_free_streams(struct usb_hcd *hcd, struct usb_device *udev,
1cd8fd28
TB		 2535 struct usb_host_endpoint **eps, unsigned int num_eps,
2536 gfp_t mem_flags)
2537{
a54c979f
SAS		 2538 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2539 unsigned long flags;
2540 int ret;
2541 unsigned int index;
2542 unsigned int i;
2543
2544 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2545 for (i = 0; i < num_eps; i++) {
2546 index = dummy_get_ep_idx(&eps[i]->desc);
2547 if (!((1 << index) & dum_hcd->stream_en_ep)) {
2548 ret = -EINVAL;
2549 goto out;
2550 }
2551 }
2552
2553 for (i = 0; i < num_eps; i++) {
2554 index = dummy_get_ep_idx(&eps[i]->desc);
2555 dum_hcd->stream_en_ep &= ~(1 << index);
2556 set_max_streams_for_pipe(dum_hcd,
2557 usb_endpoint_num(&eps[i]->desc), 0);
2558 }
2559 ret = 0;
2560out:
2561 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2562 return ret;
1cd8fd28
TB		 2563}
2564
2565static struct hc_driver dummy_hcd = {
1da177e4
LT		 2566 .description = (char *) driver_name,
2567 .product_desc = "Dummy host controller",
cdfcbd2c 2568 .hcd_priv_size = sizeof(struct dummy_hcd),
1da177e4 2569
1cd8fd28 2570 .flags = HCD_USB3 | HCD_SHARED,
1da177e4 2571
cdfcbd2c 2572 .reset = dummy_setup,
1da177e4
LT		 2573 .start = dummy_start,
2574 .stop = dummy_stop,
2575
18f2cbaa
SAS		 2576 .urb_enqueue = dummy_urb_enqueue,
2577 .urb_dequeue = dummy_urb_dequeue,
1da177e4 2578
18f2cbaa 2579 .get_frame_number = dummy_h_get_frame,
1da177e4 2580
18f2cbaa
SAS		 2581 .hub_status_data = dummy_hub_status,
2582 .hub_control = dummy_hub_control,
0c0382e3
AS		 2583 .bus_suspend = dummy_bus_suspend,
2584 .bus_resume = dummy_bus_resume,
1cd8fd28
TB		 2585
2586 .alloc_streams = dummy_alloc_streams,
2587 .free_streams = dummy_free_streams,
1da177e4
LT		 2588};
2589
8364d6b0 2590static int dummy_hcd_probe(struct platform_device *pdev)
1da177e4 2591{
b100a2f3 2592 struct dummy *dum;
cdfcbd2c 2593 struct usb_hcd *hs_hcd;
1cd8fd28 2594 struct usb_hcd *ss_hcd;
1da177e4
LT		 2595 int retval;
2596
8364d6b0 2597 dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
b100a2f3 2598 dum = *((void **)dev_get_platdata(&pdev->dev));
1da177e4 2599
1cd8fd28
TB		 2600 if (!mod_data.is_super_speed)
2601 dummy_hcd.flags = HCD_USB2;
cdfcbd2c
TB		 2602 hs_hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev));
2603 if (!hs_hcd)
1da177e4 2604 return -ENOMEM;
cdfcbd2c 2605 hs_hcd->has_tt = 1;
1da177e4 2606
cdfcbd2c 2607 retval = usb_add_hcd(hs_hcd, 0, 0);
1b68a4ca
SAS		 2608 if (retval)
2609 goto put_usb2_hcd;
1cd8fd28
TB		 2610
2611 if (mod_data.is_super_speed) {
2612 ss_hcd = usb_create_shared_hcd(&dummy_hcd, &pdev->dev,
2613 dev_name(&pdev->dev), hs_hcd);
2614 if (!ss_hcd) {
2615 retval = -ENOMEM;
2616 goto dealloc_usb2_hcd;
2617 }
2618
2619 retval = usb_add_hcd(ss_hcd, 0, 0);
2620 if (retval)
2621 goto put_usb3_hcd;
2622 }
2623 return 0;
2624
2625put_usb3_hcd:
2626 usb_put_hcd(ss_hcd);
2627dealloc_usb2_hcd:
1b68a4ca
SAS		 2628 usb_remove_hcd(hs_hcd);
2629put_usb2_hcd:
1cd8fd28 2630 usb_put_hcd(hs_hcd);
b100a2f3 2631 dum->hs_hcd = dum->ss_hcd = NULL;
1da177e4
LT		 2632 return retval;
2633}
2634
cdfcbd2c 2635static int dummy_hcd_remove(struct platform_device *pdev)
1da177e4 2636{
cdfcbd2c
TB		 2637 struct dummy *dum;
2638
18f2cbaa 2639 dum = hcd_to_dummy_hcd(platform_get_drvdata(pdev))->dum;
1cd8fd28
TB		 2640
2641 if (dum->ss_hcd) {
2642 usb_remove_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2643 usb_put_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2644 }
2645
cdfcbd2c
TB		 2646 usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
2647 usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
1cd8fd28 2648
b100a2f3
SAS		 2649 dum->hs_hcd = NULL;
2650 dum->ss_hcd = NULL;
1da177e4 2651
d9b76251 2652 return 0;
1da177e4
LT		 2653}
2654
18f2cbaa 2655static int dummy_hcd_suspend(struct platform_device *pdev, pm_message_t state)
391eca9d
AS		 2656{
2657 struct usb_hcd *hcd;
cdfcbd2c 2658 struct dummy_hcd *dum_hcd;
3cf0a22e 2659 int rc = 0;
391eca9d 2660
18f2cbaa 2661 dev_dbg(&pdev->dev, "%s\n", __func__);
391eca9d 2662
18f2cbaa 2663 hcd = platform_get_drvdata(pdev);
cdfcbd2c
TB		 2664 dum_hcd = hcd_to_dummy_hcd(hcd);
2665 if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
3cf0a22e
AS		 2666 dev_warn(&pdev->dev, "Root hub isn't suspended!\n");
2667 rc = -EBUSY;
2668 } else
2669 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
2670 return rc;
391eca9d
AS		 2671}
2672
18f2cbaa 2673static int dummy_hcd_resume(struct platform_device *pdev)
391eca9d
AS		 2674{
2675 struct usb_hcd *hcd;
2676
18f2cbaa 2677 dev_dbg(&pdev->dev, "%s\n", __func__);
391eca9d 2678
18f2cbaa 2679 hcd = platform_get_drvdata(pdev);
3cf0a22e 2680 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
18f2cbaa 2681 usb_hcd_poll_rh_status(hcd);
391eca9d
AS		 2682 return 0;
2683}
2684
3ae5eaec 2685static struct platform_driver dummy_hcd_driver = {
d9b76251
AS		 2686 .probe = dummy_hcd_probe,
2687 .remove = dummy_hcd_remove,
391eca9d
AS		 2688 .suspend = dummy_hcd_suspend,
2689 .resume = dummy_hcd_resume,
3ae5eaec
RK		 2690 .driver = {
2691 .name = (char *) driver_name,
3ae5eaec 2692 },
d9b76251 2693};
1da177e4 2694
d9b76251 2695/*-------------------------------------------------------------------------*/
b100a2f3 2696#define MAX_NUM_UDC 2
b2113136
SAS		 2697static struct platform_device *the_udc_pdev[MAX_NUM_UDC];
2698static struct platform_device *the_hcd_pdev[MAX_NUM_UDC];
1da177e4 2699
18f2cbaa 2700static int __init init(void)
1da177e4 2701{
a89a2cd3 2702 int retval = -ENOMEM;
c7a1db45 2703 int i;
b100a2f3 2704 struct dummy *dum[MAX_NUM_UDC];
1da177e4 2705
18f2cbaa 2706 if (usb_disabled())
1da177e4 2707 return -ENODEV;
d9b76251 2708
7eca4c5a
TB		 2709 if (!mod_data.is_high_speed && mod_data.is_super_speed)
2710 return -EINVAL;
2711
c7a1db45 2712 if (mod_data.num < 1 || mod_data.num > MAX_NUM_UDC) {
fa84acf0 2713 pr_err("Number of emulated UDC must be in range of 1...%d\n",
c7a1db45
SAS		 2714 MAX_NUM_UDC);
2715 return -EINVAL;
2716 }
b100a2f3 2717
c7a1db45
SAS		 2718 for (i = 0; i < mod_data.num; i++) {
2719 the_hcd_pdev[i] = platform_device_alloc(driver_name, i);
2720 if (!the_hcd_pdev[i]) {
2721 i--;
2722 while (i >= 0)
2723 platform_device_put(the_hcd_pdev[i--]);
2724 return retval;
2725 }
2726 }
2727 for (i = 0; i < mod_data.num; i++) {
2728 the_udc_pdev[i] = platform_device_alloc(gadget_name, i);
2729 if (!the_udc_pdev[i]) {
2730 i--;
2731 while (i >= 0)
2732 platform_device_put(the_udc_pdev[i--]);
2733 goto err_alloc_udc;
2734 }
2735 }
b100a2f3
SAS		 2736 for (i = 0; i < mod_data.num; i++) {
2737 dum[i] = kzalloc(sizeof(struct dummy), GFP_KERNEL);
481d3042
WY		 2738 if (!dum[i]) {
2739 retval = -ENOMEM;
b100a2f3 2740 goto err_add_pdata;
481d3042 2741 }
b100a2f3
SAS		 2742 retval = platform_device_add_data(the_hcd_pdev[i], &dum[i],
2743 sizeof(void *));
2744 if (retval)
2745 goto err_add_pdata;
2746 retval = platform_device_add_data(the_udc_pdev[i], &dum[i],
2747 sizeof(void *));
2748 if (retval)
2749 goto err_add_pdata;
2750 }
d9b76251 2751
a89a2cd3
AS		 2752 retval = platform_driver_register(&dummy_hcd_driver);
2753 if (retval < 0)
b100a2f3 2754 goto err_add_pdata;
a89a2cd3 2755 retval = platform_driver_register(&dummy_udc_driver);
d9b76251
AS		 2756 if (retval < 0)
2757 goto err_register_udc_driver;
2758
c7a1db45
SAS		 2759 for (i = 0; i < mod_data.num; i++) {
2760 retval = platform_device_add(the_hcd_pdev[i]);
2761 if (retval < 0) {
2762 i--;
2763 while (i >= 0)
2764 platform_device_del(the_hcd_pdev[i--]);
2765 goto err_add_hcd;
2766 }
2767 }
b100a2f3
SAS		 2768 for (i = 0; i < mod_data.num; i++) {
2769 if (!dum[i]->hs_hcd ||
2770 (!dum[i]->ss_hcd && mod_data.is_super_speed)) {
2771 /*
2772 * The hcd was added successfully but its probe
2773 * function failed for some reason.
2774 */
2775 retval = -EINVAL;
2776 goto err_add_udc;
2777 }
865835fa 2778 }
c7a1db45 2779
c7a1db45
SAS		 2780 for (i = 0; i < mod_data.num; i++) {
2781 retval = platform_device_add(the_udc_pdev[i]);
2782 if (retval < 0) {
2783 i--;
2784 while (i >= 0)
2785 platform_device_del(the_udc_pdev[i]);
2786 goto err_add_udc;
2787 }
2788 }
2789
2790 for (i = 0; i < mod_data.num; i++) {
2791 if (!platform_get_drvdata(the_udc_pdev[i])) {
2792 /*
2793 * The udc was added successfully but its probe
2794 * function failed for some reason.
2795 */
2796 retval = -EINVAL;
2797 goto err_probe_udc;
2798 }
865835fa 2799 }
d9b76251
AS		 2800 return retval;
2801
865835fa 2802err_probe_udc:
c7a1db45
SAS		 2803 for (i = 0; i < mod_data.num; i++)
2804 platform_device_del(the_udc_pdev[i]);
a89a2cd3 2805err_add_udc:
c7a1db45
SAS		 2806 for (i = 0; i < mod_data.num; i++)
2807 platform_device_del(the_hcd_pdev[i]);
a89a2cd3
AS		 2808err_add_hcd:
2809 platform_driver_unregister(&dummy_udc_driver);
d9b76251 2810err_register_udc_driver:
a89a2cd3 2811 platform_driver_unregister(&dummy_hcd_driver);
b100a2f3
SAS		 2812err_add_pdata:
2813 for (i = 0; i < mod_data.num; i++)
2814 kfree(dum[i]);
c7a1db45
SAS		 2815 for (i = 0; i < mod_data.num; i++)
2816 platform_device_put(the_udc_pdev[i]);
a89a2cd3 2817err_alloc_udc:
c7a1db45
SAS		 2818 for (i = 0; i < mod_data.num; i++)
2819 platform_device_put(the_hcd_pdev[i]);
1da177e4
LT		 2820 return retval;
2821}
18f2cbaa 2822module_init(init);
1da177e4 2823
18f2cbaa 2824static void __exit cleanup(void)
1da177e4 2825{
c7a1db45
SAS		 2826 int i;
2827
2828 for (i = 0; i < mod_data.num; i++) {
b100a2f3
SAS		 2829 struct dummy *dum;
2830
2831 dum = *((void **)dev_get_platdata(&the_udc_pdev[i]->dev));
2832
c7a1db45
SAS		 2833 platform_device_unregister(the_udc_pdev[i]);
2834 platform_device_unregister(the_hcd_pdev[i]);
b100a2f3 2835 kfree(dum);
c7a1db45 2836 }
a89a2cd3
AS		 2837 platform_driver_unregister(&dummy_udc_driver);
2838 platform_driver_unregister(&dummy_hcd_driver);
1da177e4 2839}
18f2cbaa 2840module_exit(cleanup);
Linux kernel - Deliverables
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