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Viewing changes to drivers/usb/gadget/dummy_hcd.c

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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drivers/usb/gadget/dummy_hcd.c
 
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.
 
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
 
 
28
#include <linux/module.h>
 
29
#include <linux/kernel.h>
 
30
#include <linux/delay.h>
 
31
#include <linux/ioport.h>
 
32
#include <linux/slab.h>
 
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>
 
38
#include <linux/platform_device.h>
 
39
#include <linux/usb.h>
 
40
#include <linux/usb/gadget.h>
 
41
#include <linux/usb/hcd.h>
 
42
 
 
43
#include <asm/byteorder.h>
 
44
#include <asm/io.h>
 
45
#include <asm/irq.h>
 
46
#include <asm/system.h>
 
47
#include <asm/unaligned.h>
 
48
 
 
49
 
 
50
#define DRIVER_DESC     "USB Host+Gadget Emulator"
 
51
#define DRIVER_VERSION  "02 May 2005"
 
52
 
 
53
#define POWER_BUDGET    500     /* in mA; use 8 for low-power port testing */
 
54
 
 
55
static const char       driver_name [] = "dummy_hcd";
 
56
static const char       driver_desc [] = "USB Host+Gadget Emulator";
 
57
 
 
58
static const char       gadget_name [] = "dummy_udc";
 
59
 
 
60
MODULE_DESCRIPTION (DRIVER_DESC);
 
61
MODULE_AUTHOR ("David Brownell");
 
62
MODULE_LICENSE ("GPL");
 
63
 
 
64
struct dummy_hcd_module_parameters {
 
65
        bool is_super_speed;
 
66
        bool is_high_speed;
 
67
};
 
68
 
 
69
static struct dummy_hcd_module_parameters mod_data = {
 
70
        .is_super_speed = false,
 
71
        .is_high_speed = true,
 
72
};
 
73
module_param_named(is_super_speed, mod_data.is_super_speed, bool, S_IRUGO);
 
74
MODULE_PARM_DESC(is_super_speed, "true to simulate SuperSpeed connection");
 
75
module_param_named(is_high_speed, mod_data.is_high_speed, bool, S_IRUGO);
 
76
MODULE_PARM_DESC(is_high_speed, "true to simulate HighSpeed connection");
 
77
/*-------------------------------------------------------------------------*/
 
78
 
 
79
/* gadget side driver data structres */
 
80
struct dummy_ep {
 
81
        struct list_head                queue;
 
82
        unsigned long                   last_io;        /* jiffies timestamp */
 
83
        struct usb_gadget               *gadget;
 
84
        const struct usb_endpoint_descriptor *desc;
 
85
        struct usb_ep                   ep;
 
86
        unsigned                        halted : 1;
 
87
        unsigned                        wedged : 1;
 
88
        unsigned                        already_seen : 1;
 
89
        unsigned                        setup_stage : 1;
 
90
};
 
91
 
 
92
struct dummy_request {
 
93
        struct list_head                queue;          /* ep's requests */
 
94
        struct usb_request              req;
 
95
};
 
96
 
 
97
static inline struct dummy_ep *usb_ep_to_dummy_ep (struct usb_ep *_ep)
 
98
{
 
99
        return container_of (_ep, struct dummy_ep, ep);
 
100
}
 
101
 
 
102
static inline struct dummy_request *usb_request_to_dummy_request
 
103
                (struct usb_request *_req)
 
104
{
 
105
        return container_of (_req, struct dummy_request, req);
 
106
}
 
107
 
 
108
/*-------------------------------------------------------------------------*/
 
109
 
 
110
/*
 
111
 * Every device has ep0 for control requests, plus up to 30 more endpoints,
 
112
 * in one of two types:
 
113
 *
 
114
 *   - Configurable:  direction (in/out), type (bulk, iso, etc), and endpoint
 
115
 *     number can be changed.  Names like "ep-a" are used for this type.
 
116
 *
 
117
 *   - Fixed Function:  in other cases.  some characteristics may be mutable;
 
118
 *     that'd be hardware-specific.  Names like "ep12out-bulk" are used.
 
119
 *
 
120
 * Gadget drivers are responsible for not setting up conflicting endpoint
 
121
 * configurations, illegal or unsupported packet lengths, and so on.
 
122
 */
 
123
 
 
124
static const char ep0name [] = "ep0";
 
125
 
 
126
static const char *const ep_name [] = {
 
127
        ep0name,                                /* everyone has ep0 */
 
128
 
 
129
        /* act like a net2280: high speed, six configurable endpoints */
 
130
        "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f",
 
131
 
 
132
        /* or like pxa250: fifteen fixed function endpoints */
 
133
        "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int",
 
134
        "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int",
 
135
        "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso",
 
136
                "ep15in-int",
 
137
 
 
138
        /* or like sa1100: two fixed function endpoints */
 
139
        "ep1out-bulk", "ep2in-bulk",
 
140
};
 
141
#define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name)
 
142
 
 
143
/*-------------------------------------------------------------------------*/
 
144
 
 
145
#define FIFO_SIZE               64
 
146
 
 
147
struct urbp {
 
148
        struct urb              *urb;
 
149
        struct list_head        urbp_list;
 
150
};
 
151
 
 
152
 
 
153
enum dummy_rh_state {
 
154
        DUMMY_RH_RESET,
 
155
        DUMMY_RH_SUSPENDED,
 
156
        DUMMY_RH_RUNNING
 
157
};
 
158
 
 
159
struct dummy_hcd {
 
160
        struct dummy                    *dum;
 
161
        enum dummy_rh_state             rh_state;
 
162
        struct timer_list               timer;
 
163
        u32                             port_status;
 
164
        u32                             old_status;
 
165
        unsigned long                   re_timeout;
 
166
 
 
167
        struct usb_device               *udev;
 
168
        struct list_head                urbp_list;
 
169
 
 
170
        unsigned                        active:1;
 
171
        unsigned                        old_active:1;
 
172
        unsigned                        resuming:1;
 
173
};
 
174
 
 
175
struct dummy {
 
176
        spinlock_t                      lock;
 
177
 
 
178
        /*
 
179
         * SLAVE/GADGET side support
 
180
         */
 
181
        struct dummy_ep                 ep [DUMMY_ENDPOINTS];
 
182
        int                             address;
 
183
        struct usb_gadget               gadget;
 
184
        struct usb_gadget_driver        *driver;
 
185
        struct dummy_request            fifo_req;
 
186
        u8                              fifo_buf [FIFO_SIZE];
 
187
        u16                             devstatus;
 
188
        unsigned                        udc_suspended:1;
 
189
        unsigned                        pullup:1;
 
190
 
 
191
        /*
 
192
         * MASTER/HOST side support
 
193
         */
 
194
        struct dummy_hcd                *hs_hcd;
 
195
        struct dummy_hcd                *ss_hcd;
 
196
};
 
197
 
 
198
static inline struct dummy_hcd *hcd_to_dummy_hcd(struct usb_hcd *hcd)
 
199
{
 
200
        return (struct dummy_hcd *) (hcd->hcd_priv);
 
201
}
 
202
 
 
203
static inline struct usb_hcd *dummy_hcd_to_hcd(struct dummy_hcd *dum)
 
204
{
 
205
        return container_of((void *) dum, struct usb_hcd, hcd_priv);
 
206
}
 
207
 
 
208
static inline struct device *dummy_dev(struct dummy_hcd *dum)
 
209
{
 
210
        return dummy_hcd_to_hcd(dum)->self.controller;
 
211
}
 
212
 
 
213
static inline struct device *udc_dev (struct dummy *dum)
 
214
{
 
215
        return dum->gadget.dev.parent;
 
216
}
 
217
 
 
218
static inline struct dummy *ep_to_dummy (struct dummy_ep *ep)
 
219
{
 
220
        return container_of (ep->gadget, struct dummy, gadget);
 
221
}
 
222
 
 
223
static inline struct dummy_hcd *gadget_to_dummy_hcd(struct usb_gadget *gadget)
 
224
{
 
225
        struct dummy *dum = container_of(gadget, struct dummy, gadget);
 
226
        if (dum->gadget.speed == USB_SPEED_SUPER)
 
227
                return dum->ss_hcd;
 
228
        else
 
229
                return dum->hs_hcd;
 
230
}
 
231
 
 
232
static inline struct dummy *gadget_dev_to_dummy (struct device *dev)
 
233
{
 
234
        return container_of (dev, struct dummy, gadget.dev);
 
235
}
 
236
 
 
237
static struct dummy                     the_controller;
 
238
 
 
239
/*-------------------------------------------------------------------------*/
 
240
 
 
241
/* SLAVE/GADGET SIDE UTILITY ROUTINES */
 
242
 
 
243
/* called with spinlock held */
 
244
static void nuke (struct dummy *dum, struct dummy_ep *ep)
 
245
{
 
246
        while (!list_empty (&ep->queue)) {
 
247
                struct dummy_request    *req;
 
248
 
 
249
                req = list_entry (ep->queue.next, struct dummy_request, queue);
 
250
                list_del_init (&req->queue);
 
251
                req->req.status = -ESHUTDOWN;
 
252
 
 
253
                spin_unlock (&dum->lock);
 
254
                req->req.complete (&ep->ep, &req->req);
 
255
                spin_lock (&dum->lock);
 
256
        }
 
257
}
 
258
 
 
259
/* caller must hold lock */
 
260
static void
 
261
stop_activity (struct dummy *dum)
 
262
{
 
263
        struct dummy_ep *ep;
 
264
 
 
265
        /* prevent any more requests */
 
266
        dum->address = 0;
 
267
 
 
268
        /* The timer is left running so that outstanding URBs can fail */
 
269
 
 
270
        /* nuke any pending requests first, so driver i/o is quiesced */
 
271
        list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list)
 
272
                nuke (dum, ep);
 
273
 
 
274
        /* driver now does any non-usb quiescing necessary */
 
275
}
 
276
 
 
277
/**
 
278
 * set_link_state_by_speed() - Sets the current state of the link according to
 
279
 *      the hcd speed
 
280
 * @dum_hcd: pointer to the dummy_hcd structure to update the link state for
 
281
 *
 
282
 * This function updates the port_status according to the link state and the
 
283
 * speed of the hcd.
 
284
 */
 
285
static void set_link_state_by_speed(struct dummy_hcd *dum_hcd)
 
286
{
 
287
        struct dummy *dum = dum_hcd->dum;
 
288
 
 
289
        if (dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3) {
 
290
                if ((dum_hcd->port_status & USB_SS_PORT_STAT_POWER) == 0) {
 
291
                        dum_hcd->port_status = 0;
 
292
                } else if (!dum->pullup || dum->udc_suspended) {
 
293
                        /* UDC suspend must cause a disconnect */
 
294
                        dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
 
295
                                                USB_PORT_STAT_ENABLE);
 
296
                        if ((dum_hcd->old_status &
 
297
                             USB_PORT_STAT_CONNECTION) != 0)
 
298
                                dum_hcd->port_status |=
 
299
                                        (USB_PORT_STAT_C_CONNECTION << 16);
 
300
                } else {
 
301
                        /* device is connected and not suspended */
 
302
                        dum_hcd->port_status |= (USB_PORT_STAT_CONNECTION |
 
303
                                                 USB_PORT_STAT_SPEED_5GBPS) ;
 
304
                        if ((dum_hcd->old_status &
 
305
                             USB_PORT_STAT_CONNECTION) == 0)
 
306
                                dum_hcd->port_status |=
 
307
                                        (USB_PORT_STAT_C_CONNECTION << 16);
 
308
                        if ((dum_hcd->port_status &
 
309
                             USB_PORT_STAT_ENABLE) == 1 &&
 
310
                                (dum_hcd->port_status &
 
311
                                 USB_SS_PORT_LS_U0) == 1 &&
 
312
                                dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
 
313
                                dum_hcd->active = 1;
 
314
                }
 
315
        } else {
 
316
                if ((dum_hcd->port_status & USB_PORT_STAT_POWER) == 0) {
 
317
                        dum_hcd->port_status = 0;
 
318
                } else if (!dum->pullup || dum->udc_suspended) {
 
319
                        /* UDC suspend must cause a disconnect */
 
320
                        dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
 
321
                                                USB_PORT_STAT_ENABLE |
 
322
                                                USB_PORT_STAT_LOW_SPEED |
 
323
                                                USB_PORT_STAT_HIGH_SPEED |
 
324
                                                USB_PORT_STAT_SUSPEND);
 
325
                        if ((dum_hcd->old_status &
 
326
                             USB_PORT_STAT_CONNECTION) != 0)
 
327
                                dum_hcd->port_status |=
 
328
                                        (USB_PORT_STAT_C_CONNECTION << 16);
 
329
                } else {
 
330
                        dum_hcd->port_status |= USB_PORT_STAT_CONNECTION;
 
331
                        if ((dum_hcd->old_status &
 
332
                             USB_PORT_STAT_CONNECTION) == 0)
 
333
                                dum_hcd->port_status |=
 
334
                                        (USB_PORT_STAT_C_CONNECTION << 16);
 
335
                        if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0)
 
336
                                dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
 
337
                        else if ((dum_hcd->port_status &
 
338
                                  USB_PORT_STAT_SUSPEND) == 0 &&
 
339
                                        dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
 
340
                                dum_hcd->active = 1;
 
341
                }
 
342
        }
 
343
}
 
344
 
 
345
/* caller must hold lock */
 
346
static void set_link_state(struct dummy_hcd *dum_hcd)
 
347
{
 
348
        struct dummy *dum = dum_hcd->dum;
 
349
 
 
350
        dum_hcd->active = 0;
 
351
        if (dum->pullup)
 
352
                if ((dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3 &&
 
353
                     dum->gadget.speed != USB_SPEED_SUPER) ||
 
354
                    (dummy_hcd_to_hcd(dum_hcd)->speed != HCD_USB3 &&
 
355
                     dum->gadget.speed == USB_SPEED_SUPER))
 
356
                        return;
 
357
 
 
358
        set_link_state_by_speed(dum_hcd);
 
359
 
 
360
        if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0 ||
 
361
             dum_hcd->active)
 
362
                dum_hcd->resuming = 0;
 
363
 
 
364
        /* if !connected or reset */
 
365
        if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0 ||
 
366
                        (dum_hcd->port_status & USB_PORT_STAT_RESET) != 0) {
 
367
                /*
 
368
                 * We're connected and not reset (reset occurred now),
 
369
                 * and driver attached - disconnect!
 
370
                 */
 
371
                if ((dum_hcd->old_status & USB_PORT_STAT_CONNECTION) != 0 &&
 
372
                    (dum_hcd->old_status & USB_PORT_STAT_RESET) == 0 &&
 
373
                    dum->driver) {
 
374
                        stop_activity(dum);
 
375
                        spin_unlock(&dum->lock);
 
376
                        dum->driver->disconnect(&dum->gadget);
 
377
                        spin_lock(&dum->lock);
 
378
                }
 
379
        } else if (dum_hcd->active != dum_hcd->old_active) {
 
380
                if (dum_hcd->old_active && dum->driver->suspend) {
 
381
                        spin_unlock(&dum->lock);
 
382
                        dum->driver->suspend(&dum->gadget);
 
383
                        spin_lock(&dum->lock);
 
384
                } else if (!dum_hcd->old_active &&  dum->driver->resume) {
 
385
                        spin_unlock(&dum->lock);
 
386
                        dum->driver->resume(&dum->gadget);
 
387
                        spin_lock(&dum->lock);
 
388
                }
 
389
        }
 
390
 
 
391
        dum_hcd->old_status = dum_hcd->port_status;
 
392
        dum_hcd->old_active = dum_hcd->active;
 
393
}
 
394
 
 
395
/*-------------------------------------------------------------------------*/
 
396
 
 
397
/* SLAVE/GADGET SIDE DRIVER
 
398
 *
 
399
 * This only tracks gadget state.  All the work is done when the host
 
400
 * side tries some (emulated) i/o operation.  Real device controller
 
401
 * drivers would do real i/o using dma, fifos, irqs, timers, etc.
 
402
 */
 
403
 
 
404
#define is_enabled(dum) \
 
405
        (dum->port_status & USB_PORT_STAT_ENABLE)
 
406
 
 
407
static int
 
408
dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 
409
{
 
410
        struct dummy            *dum;
 
411
        struct dummy_hcd        *dum_hcd;
 
412
        struct dummy_ep         *ep;
 
413
        unsigned                max;
 
414
        int                     retval;
 
415
 
 
416
        ep = usb_ep_to_dummy_ep (_ep);
 
417
        if (!_ep || !desc || ep->desc || _ep->name == ep0name
 
418
                        || desc->bDescriptorType != USB_DT_ENDPOINT)
 
419
                return -EINVAL;
 
420
        dum = ep_to_dummy (ep);
 
421
        if (!dum->driver)
 
422
                return -ESHUTDOWN;
 
423
 
 
424
        dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
 
425
        if (!is_enabled(dum_hcd))
 
426
                return -ESHUTDOWN;
 
427
 
 
428
        /*
 
429
         * For HS/FS devices only bits 0..10 of the wMaxPacketSize represent the
 
430
         * maximum packet size.
 
431
         * For SS devices the wMaxPacketSize is limited by 1024.
 
432
         */
 
433
        max = usb_endpoint_maxp(desc) & 0x7ff;
 
434
 
 
435
        /* drivers must not request bad settings, since lower levels
 
436
         * (hardware or its drivers) may not check.  some endpoints
 
437
         * can't do iso, many have maxpacket limitations, etc.
 
438
         *
 
439
         * since this "hardware" driver is here to help debugging, we
 
440
         * have some extra sanity checks.  (there could be more though,
 
441
         * especially for "ep9out" style fixed function ones.)
 
442
         */
 
443
        retval = -EINVAL;
 
444
        switch (desc->bmAttributes & 0x03) {
 
445
        case USB_ENDPOINT_XFER_BULK:
 
446
                if (strstr (ep->ep.name, "-iso")
 
447
                                || strstr (ep->ep.name, "-int")) {
 
448
                        goto done;
 
449
                }
 
450
                switch (dum->gadget.speed) {
 
451
                case USB_SPEED_SUPER:
 
452
                        if (max == 1024)
 
453
                                break;
 
454
                        goto done;
 
455
                case USB_SPEED_HIGH:
 
456
                        if (max == 512)
 
457
                                break;
 
458
                        goto done;
 
459
                case USB_SPEED_FULL:
 
460
                        if (max == 8 || max == 16 || max == 32 || max == 64)
 
461
                                /* we'll fake any legal size */
 
462
                                break;
 
463
                        /* save a return statement */
 
464
                default:
 
465
                        goto done;
 
466
                }
 
467
                break;
 
468
        case USB_ENDPOINT_XFER_INT:
 
469
                if (strstr (ep->ep.name, "-iso")) /* bulk is ok */
 
470
                        goto done;
 
471
                /* real hardware might not handle all packet sizes */
 
472
                switch (dum->gadget.speed) {
 
473
                case USB_SPEED_SUPER:
 
474
                case USB_SPEED_HIGH:
 
475
                        if (max <= 1024)
 
476
                                break;
 
477
                        /* save a return statement */
 
478
                case USB_SPEED_FULL:
 
479
                        if (max <= 64)
 
480
                                break;
 
481
                        /* save a return statement */
 
482
                default:
 
483
                        if (max <= 8)
 
484
                                break;
 
485
                        goto done;
 
486
                }
 
487
                break;
 
488
        case USB_ENDPOINT_XFER_ISOC:
 
489
                if (strstr (ep->ep.name, "-bulk")
 
490
                                || strstr (ep->ep.name, "-int"))
 
491
                        goto done;
 
492
                /* real hardware might not handle all packet sizes */
 
493
                switch (dum->gadget.speed) {
 
494
                case USB_SPEED_SUPER:
 
495
                case USB_SPEED_HIGH:
 
496
                        if (max <= 1024)
 
497
                                break;
 
498
                        /* save a return statement */
 
499
                case USB_SPEED_FULL:
 
500
                        if (max <= 1023)
 
501
                                break;
 
502
                        /* save a return statement */
 
503
                default:
 
504
                        goto done;
 
505
                }
 
506
                break;
 
507
        default:
 
508
                /* few chips support control except on ep0 */
 
509
                goto done;
 
510
        }
 
511
 
 
512
        _ep->maxpacket = max;
 
513
        ep->desc = desc;
 
514
 
 
515
        dev_dbg (udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d\n",
 
516
                _ep->name,
 
517
                desc->bEndpointAddress & 0x0f,
 
518
                (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
 
519
                ({ char *val;
 
520
                 switch (desc->bmAttributes & 0x03) {
 
521
                 case USB_ENDPOINT_XFER_BULK:
 
522
                         val = "bulk";
 
523
                         break;
 
524
                 case USB_ENDPOINT_XFER_ISOC:
 
525
                         val = "iso";
 
526
                         break;
 
527
                 case USB_ENDPOINT_XFER_INT:
 
528
                         val = "intr";
 
529
                         break;
 
530
                 default:
 
531
                         val = "ctrl";
 
532
                         break;
 
533
                 }; val; }),
 
534
                max);
 
535
 
 
536
        /* at this point real hardware should be NAKing transfers
 
537
         * to that endpoint, until a buffer is queued to it.
 
538
         */
 
539
        ep->halted = ep->wedged = 0;
 
540
        retval = 0;
 
541
done:
 
542
        return retval;
 
543
}
 
544
 
 
545
static int dummy_disable (struct usb_ep *_ep)
 
546
{
 
547
        struct dummy_ep         *ep;
 
548
        struct dummy            *dum;
 
549
        unsigned long           flags;
 
550
        int                     retval;
 
551
 
 
552
        ep = usb_ep_to_dummy_ep (_ep);
 
553
        if (!_ep || !ep->desc || _ep->name == ep0name)
 
554
                return -EINVAL;
 
555
        dum = ep_to_dummy (ep);
 
556
 
 
557
        spin_lock_irqsave (&dum->lock, flags);
 
558
        ep->desc = NULL;
 
559
        retval = 0;
 
560
        nuke (dum, ep);
 
561
        spin_unlock_irqrestore (&dum->lock, flags);
 
562
 
 
563
        dev_dbg (udc_dev(dum), "disabled %s\n", _ep->name);
 
564
        return retval;
 
565
}
 
566
 
 
567
static struct usb_request *
 
568
dummy_alloc_request (struct usb_ep *_ep, gfp_t mem_flags)
 
569
{
 
570
        struct dummy_ep         *ep;
 
571
        struct dummy_request    *req;
 
572
 
 
573
        if (!_ep)
 
574
                return NULL;
 
575
        ep = usb_ep_to_dummy_ep (_ep);
 
576
 
 
577
        req = kzalloc(sizeof(*req), mem_flags);
 
578
        if (!req)
 
579
                return NULL;
 
580
        INIT_LIST_HEAD (&req->queue);
 
581
        return &req->req;
 
582
}
 
583
 
 
584
static void
 
585
dummy_free_request (struct usb_ep *_ep, struct usb_request *_req)
 
586
{
 
587
        struct dummy_ep         *ep;
 
588
        struct dummy_request    *req;
 
589
 
 
590
        ep = usb_ep_to_dummy_ep (_ep);
 
591
        if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
 
592
                return;
 
593
 
 
594
        req = usb_request_to_dummy_request (_req);
 
595
        WARN_ON (!list_empty (&req->queue));
 
596
        kfree (req);
 
597
}
 
598
 
 
599
static void
 
600
fifo_complete (struct usb_ep *ep, struct usb_request *req)
 
601
{
 
602
}
 
603
 
 
604
static int
 
605
dummy_queue (struct usb_ep *_ep, struct usb_request *_req,
 
606
                gfp_t mem_flags)
 
607
{
 
608
        struct dummy_ep         *ep;
 
609
        struct dummy_request    *req;
 
610
        struct dummy            *dum;
 
611
        struct dummy_hcd        *dum_hcd;
 
612
        unsigned long           flags;
 
613
 
 
614
        req = usb_request_to_dummy_request (_req);
 
615
        if (!_req || !list_empty (&req->queue) || !_req->complete)
 
616
                return -EINVAL;
 
617
 
 
618
        ep = usb_ep_to_dummy_ep (_ep);
 
619
        if (!_ep || (!ep->desc && _ep->name != ep0name))
 
620
                return -EINVAL;
 
621
 
 
622
        dum = ep_to_dummy (ep);
 
623
        dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
 
624
        if (!dum->driver || !is_enabled(dum_hcd))
 
625
                return -ESHUTDOWN;
 
626
 
 
627
#if 0
 
628
        dev_dbg (udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n",
 
629
                        ep, _req, _ep->name, _req->length, _req->buf);
 
630
#endif
 
631
 
 
632
        _req->status = -EINPROGRESS;
 
633
        _req->actual = 0;
 
634
        spin_lock_irqsave (&dum->lock, flags);
 
635
 
 
636
        /* implement an emulated single-request FIFO */
 
637
        if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
 
638
                        list_empty (&dum->fifo_req.queue) &&
 
639
                        list_empty (&ep->queue) &&
 
640
                        _req->length <= FIFO_SIZE) {
 
641
                req = &dum->fifo_req;
 
642
                req->req = *_req;
 
643
                req->req.buf = dum->fifo_buf;
 
644
                memcpy (dum->fifo_buf, _req->buf, _req->length);
 
645
                req->req.context = dum;
 
646
                req->req.complete = fifo_complete;
 
647
 
 
648
                list_add_tail(&req->queue, &ep->queue);
 
649
                spin_unlock (&dum->lock);
 
650
                _req->actual = _req->length;
 
651
                _req->status = 0;
 
652
                _req->complete (_ep, _req);
 
653
                spin_lock (&dum->lock);
 
654
        }  else
 
655
                list_add_tail(&req->queue, &ep->queue);
 
656
        spin_unlock_irqrestore (&dum->lock, flags);
 
657
 
 
658
        /* real hardware would likely enable transfers here, in case
 
659
         * it'd been left NAKing.
 
660
         */
 
661
        return 0;
 
662
}
 
663
 
 
664
static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req)
 
665
{
 
666
        struct dummy_ep         *ep;
 
667
        struct dummy            *dum;
 
668
        int                     retval = -EINVAL;
 
669
        unsigned long           flags;
 
670
        struct dummy_request    *req = NULL;
 
671
 
 
672
        if (!_ep || !_req)
 
673
                return retval;
 
674
        ep = usb_ep_to_dummy_ep (_ep);
 
675
        dum = ep_to_dummy (ep);
 
676
 
 
677
        if (!dum->driver)
 
678
                return -ESHUTDOWN;
 
679
 
 
680
        local_irq_save (flags);
 
681
        spin_lock (&dum->lock);
 
682
        list_for_each_entry (req, &ep->queue, queue) {
 
683
                if (&req->req == _req) {
 
684
                        list_del_init (&req->queue);
 
685
                        _req->status = -ECONNRESET;
 
686
                        retval = 0;
 
687
                        break;
 
688
                }
 
689
        }
 
690
        spin_unlock (&dum->lock);
 
691
 
 
692
        if (retval == 0) {
 
693
                dev_dbg (udc_dev(dum),
 
694
                                "dequeued req %p from %s, len %d buf %p\n",
 
695
                                req, _ep->name, _req->length, _req->buf);
 
696
                _req->complete (_ep, _req);
 
697
        }
 
698
        local_irq_restore (flags);
 
699
        return retval;
 
700
}
 
701
 
 
702
static int
 
703
dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
 
704
{
 
705
        struct dummy_ep         *ep;
 
706
        struct dummy            *dum;
 
707
 
 
708
        if (!_ep)
 
709
                return -EINVAL;
 
710
        ep = usb_ep_to_dummy_ep (_ep);
 
711
        dum = ep_to_dummy (ep);
 
712
        if (!dum->driver)
 
713
                return -ESHUTDOWN;
 
714
        if (!value)
 
715
                ep->halted = ep->wedged = 0;
 
716
        else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
 
717
                        !list_empty (&ep->queue))
 
718
                return -EAGAIN;
 
719
        else {
 
720
                ep->halted = 1;
 
721
                if (wedged)
 
722
                        ep->wedged = 1;
 
723
        }
 
724
        /* FIXME clear emulated data toggle too */
 
725
        return 0;
 
726
}
 
727
 
 
728
static int
 
729
dummy_set_halt(struct usb_ep *_ep, int value)
 
730
{
 
731
        return dummy_set_halt_and_wedge(_ep, value, 0);
 
732
}
 
733
 
 
734
static int dummy_set_wedge(struct usb_ep *_ep)
 
735
{
 
736
        if (!_ep || _ep->name == ep0name)
 
737
                return -EINVAL;
 
738
        return dummy_set_halt_and_wedge(_ep, 1, 1);
 
739
}
 
740
 
 
741
static const struct usb_ep_ops dummy_ep_ops = {
 
742
        .enable         = dummy_enable,
 
743
        .disable        = dummy_disable,
 
744
 
 
745
        .alloc_request  = dummy_alloc_request,
 
746
        .free_request   = dummy_free_request,
 
747
 
 
748
        .queue          = dummy_queue,
 
749
        .dequeue        = dummy_dequeue,
 
750
 
 
751
        .set_halt       = dummy_set_halt,
 
752
        .set_wedge      = dummy_set_wedge,
 
753
};
 
754
 
 
755
/*-------------------------------------------------------------------------*/
 
756
 
 
757
/* there are both host and device side versions of this call ... */
 
758
static int dummy_g_get_frame (struct usb_gadget *_gadget)
 
759
{
 
760
        struct timeval  tv;
 
761
 
 
762
        do_gettimeofday (&tv);
 
763
        return tv.tv_usec / 1000;
 
764
}
 
765
 
 
766
static int dummy_wakeup (struct usb_gadget *_gadget)
 
767
{
 
768
        struct dummy_hcd *dum_hcd;
 
769
 
 
770
        dum_hcd = gadget_to_dummy_hcd(_gadget);
 
771
        if (!(dum_hcd->dum->devstatus & ((1 << USB_DEVICE_B_HNP_ENABLE)
 
772
                                | (1 << USB_DEVICE_REMOTE_WAKEUP))))
 
773
                return -EINVAL;
 
774
        if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0)
 
775
                return -ENOLINK;
 
776
        if ((dum_hcd->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
 
777
                         dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
 
778
                return -EIO;
 
779
 
 
780
        /* FIXME: What if the root hub is suspended but the port isn't? */
 
781
 
 
782
        /* hub notices our request, issues downstream resume, etc */
 
783
        dum_hcd->resuming = 1;
 
784
        dum_hcd->re_timeout = jiffies + msecs_to_jiffies(20);
 
785
        mod_timer(&dummy_hcd_to_hcd(dum_hcd)->rh_timer, dum_hcd->re_timeout);
 
786
        return 0;
 
787
}
 
788
 
 
789
static int dummy_set_selfpowered (struct usb_gadget *_gadget, int value)
 
790
{
 
791
        struct dummy    *dum;
 
792
 
 
793
        dum = (gadget_to_dummy_hcd(_gadget))->dum;
 
794
        if (value)
 
795
                dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
 
796
        else
 
797
                dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
 
798
        return 0;
 
799
}
 
800
 
 
801
static void dummy_udc_udpate_ep0(struct dummy *dum)
 
802
{
 
803
        u32 i;
 
804
 
 
805
        if (dum->gadget.speed == USB_SPEED_SUPER) {
 
806
                for (i = 0; i < DUMMY_ENDPOINTS; i++)
 
807
                        dum->ep[i].ep.max_streams = 0x10;
 
808
                dum->ep[0].ep.maxpacket = 9;
 
809
        } else {
 
810
                for (i = 0; i < DUMMY_ENDPOINTS; i++)
 
811
                        dum->ep[i].ep.max_streams = 0;
 
812
                dum->ep[0].ep.maxpacket = 64;
 
813
        }
 
814
}
 
815
 
 
816
static int dummy_pullup (struct usb_gadget *_gadget, int value)
 
817
{
 
818
        struct dummy_hcd *dum_hcd;
 
819
        struct dummy    *dum;
 
820
        unsigned long   flags;
 
821
 
 
822
        dum = gadget_dev_to_dummy(&_gadget->dev);
 
823
 
 
824
        if (value && dum->driver) {
 
825
                if (mod_data.is_super_speed)
 
826
                        dum->gadget.speed = dum->driver->speed;
 
827
                else if (mod_data.is_high_speed)
 
828
                        dum->gadget.speed = min_t(u8, USB_SPEED_HIGH,
 
829
                                        dum->driver->speed);
 
830
                else
 
831
                        dum->gadget.speed = USB_SPEED_FULL;
 
832
                dummy_udc_udpate_ep0(dum);
 
833
 
 
834
                if (dum->gadget.speed < dum->driver->speed)
 
835
                        dev_dbg(udc_dev(dum), "This device can perform faster"
 
836
                                        " if you connect it to a %s port...\n",
 
837
                                        (dum->driver->speed == USB_SPEED_SUPER ?
 
838
                                         "SuperSpeed" : "HighSpeed"));
 
839
        }
 
840
        dum_hcd = gadget_to_dummy_hcd(_gadget);
 
841
 
 
842
        spin_lock_irqsave (&dum->lock, flags);
 
843
        dum->pullup = (value != 0);
 
844
        set_link_state(dum_hcd);
 
845
        spin_unlock_irqrestore (&dum->lock, flags);
 
846
 
 
847
        usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
 
848
        return 0;
 
849
}
 
850
 
 
851
static int dummy_udc_start(struct usb_gadget *g,
 
852
                struct usb_gadget_driver *driver);
 
853
static int dummy_udc_stop(struct usb_gadget *g,
 
854
                struct usb_gadget_driver *driver);
 
855
 
 
856
static const struct usb_gadget_ops dummy_ops = {
 
857
        .get_frame      = dummy_g_get_frame,
 
858
        .wakeup         = dummy_wakeup,
 
859
        .set_selfpowered = dummy_set_selfpowered,
 
860
        .pullup         = dummy_pullup,
 
861
        .udc_start      = dummy_udc_start,
 
862
        .udc_stop       = dummy_udc_stop,
 
863
};
 
864
 
 
865
/*-------------------------------------------------------------------------*/
 
866
 
 
867
/* "function" sysfs attribute */
 
868
static ssize_t
 
869
show_function (struct device *dev, struct device_attribute *attr, char *buf)
 
870
{
 
871
        struct dummy    *dum = gadget_dev_to_dummy (dev);
 
872
 
 
873
        if (!dum->driver || !dum->driver->function)
 
874
                return 0;
 
875
        return scnprintf (buf, PAGE_SIZE, "%s\n", dum->driver->function);
 
876
}
 
877
static DEVICE_ATTR (function, S_IRUGO, show_function, NULL);
 
878
 
 
879
/*-------------------------------------------------------------------------*/
 
880
 
 
881
/*
 
882
 * Driver registration/unregistration.
 
883
 *
 
884
 * This is basically hardware-specific; there's usually only one real USB
 
885
 * device (not host) controller since that's how USB devices are intended
 
886
 * to work.  So most implementations of these api calls will rely on the
 
887
 * fact that only one driver will ever bind to the hardware.  But curious
 
888
 * hardware can be built with discrete components, so the gadget API doesn't
 
889
 * require that assumption.
 
890
 *
 
891
 * For this emulator, it might be convenient to create a usb slave device
 
892
 * for each driver that registers:  just add to a big root hub.
 
893
 */
 
894
 
 
895
static int dummy_udc_start(struct usb_gadget *g,
 
896
                struct usb_gadget_driver *driver)
 
897
{
 
898
        struct dummy_hcd        *dum_hcd = gadget_to_dummy_hcd(g);
 
899
        struct dummy            *dum = dum_hcd->dum;
 
900
 
 
901
        if (driver->speed == USB_SPEED_UNKNOWN)
 
902
                return -EINVAL;
 
903
 
 
904
        /*
 
905
         * SLAVE side init ... the layer above hardware, which
 
906
         * can't enumerate without help from the driver we're binding.
 
907
         */
 
908
 
 
909
        dum->devstatus = 0;
 
910
 
 
911
        dum->driver = driver;
 
912
        dev_dbg (udc_dev(dum), "binding gadget driver '%s'\n",
 
913
                        driver->driver.name);
 
914
        return 0;
 
915
}
 
916
 
 
917
static int dummy_udc_stop(struct usb_gadget *g,
 
918
                struct usb_gadget_driver *driver)
 
919
{
 
920
        struct dummy_hcd        *dum_hcd = gadget_to_dummy_hcd(g);
 
921
        struct dummy            *dum = dum_hcd->dum;
 
922
 
 
923
        dev_dbg (udc_dev(dum), "unregister gadget driver '%s'\n",
 
924
                        driver->driver.name);
 
925
 
 
926
        dum->driver = NULL;
 
927
 
 
928
        dummy_pullup(&dum->gadget, 0);
 
929
        return 0;
 
930
}
 
931
 
 
932
#undef is_enabled
 
933
 
 
934
/* The gadget structure is stored inside the hcd structure and will be
 
935
 * released along with it. */
 
936
static void
 
937
dummy_gadget_release (struct device *dev)
 
938
{
 
939
        return;
 
940
}
 
941
 
 
942
static void init_dummy_udc_hw(struct dummy *dum)
 
943
{
 
944
        int i;
 
945
 
 
946
        INIT_LIST_HEAD(&dum->gadget.ep_list);
 
947
        for (i = 0; i < DUMMY_ENDPOINTS; i++) {
 
948
                struct dummy_ep *ep = &dum->ep[i];
 
949
 
 
950
                if (!ep_name[i])
 
951
                        break;
 
952
                ep->ep.name = ep_name[i];
 
953
                ep->ep.ops = &dummy_ep_ops;
 
954
                list_add_tail(&ep->ep.ep_list, &dum->gadget.ep_list);
 
955
                ep->halted = ep->wedged = ep->already_seen =
 
956
                                ep->setup_stage = 0;
 
957
                ep->ep.maxpacket = ~0;
 
958
                ep->last_io = jiffies;
 
959
                ep->gadget = &dum->gadget;
 
960
                ep->desc = NULL;
 
961
                INIT_LIST_HEAD(&ep->queue);
 
962
        }
 
963
 
 
964
        dum->gadget.ep0 = &dum->ep[0].ep;
 
965
        list_del_init(&dum->ep[0].ep.ep_list);
 
966
        INIT_LIST_HEAD(&dum->fifo_req.queue);
 
967
 
 
968
#ifdef CONFIG_USB_OTG
 
969
        dum->gadget.is_otg = 1;
 
970
#endif
 
971
}
 
972
 
 
973
static int dummy_udc_probe (struct platform_device *pdev)
 
974
{
 
975
        struct dummy    *dum = &the_controller;
 
976
        int             rc;
 
977
 
 
978
        dum->gadget.name = gadget_name;
 
979
        dum->gadget.ops = &dummy_ops;
 
980
        dum->gadget.is_dualspeed = 1;
 
981
 
 
982
        dev_set_name(&dum->gadget.dev, "gadget");
 
983
        dum->gadget.dev.parent = &pdev->dev;
 
984
        dum->gadget.dev.release = dummy_gadget_release;
 
985
        rc = device_register (&dum->gadget.dev);
 
986
        if (rc < 0) {
 
987
                put_device(&dum->gadget.dev);
 
988
                return rc;
 
989
        }
 
990
 
 
991
        init_dummy_udc_hw(dum);
 
992
 
 
993
        rc = usb_add_gadget_udc(&pdev->dev, &dum->gadget);
 
994
        if (rc < 0)
 
995
                goto err_udc;
 
996
 
 
997
        rc = device_create_file (&dum->gadget.dev, &dev_attr_function);
 
998
        if (rc < 0)
 
999
                goto err_dev;
 
1000
        platform_set_drvdata(pdev, dum);
 
1001
        return rc;
 
1002
 
 
1003
err_dev:
 
1004
        usb_del_gadget_udc(&dum->gadget);
 
1005
err_udc:
 
1006
        device_unregister(&dum->gadget.dev);
 
1007
        return rc;
 
1008
}
 
1009
 
 
1010
static int dummy_udc_remove (struct platform_device *pdev)
 
1011
{
 
1012
        struct dummy    *dum = platform_get_drvdata (pdev);
 
1013
 
 
1014
        usb_del_gadget_udc(&dum->gadget);
 
1015
        platform_set_drvdata (pdev, NULL);
 
1016
        device_remove_file (&dum->gadget.dev, &dev_attr_function);
 
1017
        device_unregister (&dum->gadget.dev);
 
1018
        return 0;
 
1019
}
 
1020
 
 
1021
static void dummy_udc_pm(struct dummy *dum, struct dummy_hcd *dum_hcd,
 
1022
                int suspend)
 
1023
{
 
1024
        spin_lock_irq(&dum->lock);
 
1025
        dum->udc_suspended = suspend;
 
1026
        set_link_state(dum_hcd);
 
1027
        spin_unlock_irq(&dum->lock);
 
1028
}
 
1029
 
 
1030
static int dummy_udc_suspend(struct platform_device *pdev, pm_message_t state)
 
1031
{
 
1032
        struct dummy            *dum = platform_get_drvdata(pdev);
 
1033
        struct dummy_hcd        *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
 
1034
 
 
1035
        dev_dbg(&pdev->dev, "%s\n", __func__);
 
1036
        dummy_udc_pm(dum, dum_hcd, 1);
 
1037
        usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
 
1038
        return 0;
 
1039
}
 
1040
 
 
1041
static int dummy_udc_resume(struct platform_device *pdev)
 
1042
{
 
1043
        struct dummy            *dum = platform_get_drvdata(pdev);
 
1044
        struct dummy_hcd        *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
 
1045
 
 
1046
        dev_dbg(&pdev->dev, "%s\n", __func__);
 
1047
        dummy_udc_pm(dum, dum_hcd, 0);
 
1048
        usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
 
1049
        return 0;
 
1050
}
 
1051
 
 
1052
static struct platform_driver dummy_udc_driver = {
 
1053
        .probe          = dummy_udc_probe,
 
1054
        .remove         = dummy_udc_remove,
 
1055
        .suspend        = dummy_udc_suspend,
 
1056
        .resume         = dummy_udc_resume,
 
1057
        .driver         = {
 
1058
                .name   = (char *) gadget_name,
 
1059
                .owner  = THIS_MODULE,
 
1060
        },
 
1061
};
 
1062
 
 
1063
/*-------------------------------------------------------------------------*/
 
1064
 
 
1065
/* MASTER/HOST SIDE DRIVER
 
1066
 *
 
1067
 * this uses the hcd framework to hook up to host side drivers.
 
1068
 * its root hub will only have one device, otherwise it acts like
 
1069
 * a normal host controller.
 
1070
 *
 
1071
 * when urbs are queued, they're just stuck on a list that we
 
1072
 * scan in a timer callback.  that callback connects writes from
 
1073
 * the host with reads from the device, and so on, based on the
 
1074
 * usb 2.0 rules.
 
1075
 */
 
1076
 
 
1077
static int dummy_urb_enqueue (
 
1078
        struct usb_hcd                  *hcd,
 
1079
        struct urb                      *urb,
 
1080
        gfp_t                           mem_flags
 
1081
) {
 
1082
        struct dummy_hcd *dum_hcd;
 
1083
        struct urbp     *urbp;
 
1084
        unsigned long   flags;
 
1085
        int             rc;
 
1086
 
 
1087
        if (!urb->transfer_buffer && urb->transfer_buffer_length)
 
1088
                return -EINVAL;
 
1089
 
 
1090
        urbp = kmalloc (sizeof *urbp, mem_flags);
 
1091
        if (!urbp)
 
1092
                return -ENOMEM;
 
1093
        urbp->urb = urb;
 
1094
 
 
1095
        dum_hcd = hcd_to_dummy_hcd(hcd);
 
1096
        spin_lock_irqsave(&dum_hcd->dum->lock, flags);
 
1097
        rc = usb_hcd_link_urb_to_ep(hcd, urb);
 
1098
        if (rc) {
 
1099
                kfree(urbp);
 
1100
                goto done;
 
1101
        }
 
1102
 
 
1103
        if (!dum_hcd->udev) {
 
1104
                dum_hcd->udev = urb->dev;
 
1105
                usb_get_dev(dum_hcd->udev);
 
1106
        } else if (unlikely(dum_hcd->udev != urb->dev))
 
1107
                dev_err(dummy_dev(dum_hcd), "usb_device address has changed!\n");
 
1108
 
 
1109
        list_add_tail(&urbp->urbp_list, &dum_hcd->urbp_list);
 
1110
        urb->hcpriv = urbp;
 
1111
        if (usb_pipetype (urb->pipe) == PIPE_CONTROL)
 
1112
                urb->error_count = 1;           /* mark as a new urb */
 
1113
 
 
1114
        /* kick the scheduler, it'll do the rest */
 
1115
        if (!timer_pending(&dum_hcd->timer))
 
1116
                mod_timer(&dum_hcd->timer, jiffies + 1);
 
1117
 
 
1118
 done:
 
1119
        spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
 
1120
        return rc;
 
1121
}
 
1122
 
 
1123
static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 
1124
{
 
1125
        struct dummy_hcd *dum_hcd;
 
1126
        unsigned long   flags;
 
1127
        int             rc;
 
1128
 
 
1129
        /* giveback happens automatically in timer callback,
 
1130
         * so make sure the callback happens */
 
1131
        dum_hcd = hcd_to_dummy_hcd(hcd);
 
1132
        spin_lock_irqsave(&dum_hcd->dum->lock, flags);
 
1133
 
 
1134
        rc = usb_hcd_check_unlink_urb(hcd, urb, status);
 
1135
        if (!rc && dum_hcd->rh_state != DUMMY_RH_RUNNING &&
 
1136
                        !list_empty(&dum_hcd->urbp_list))
 
1137
                mod_timer(&dum_hcd->timer, jiffies);
 
1138
 
 
1139
        spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
 
1140
        return rc;
 
1141
}
 
1142
 
 
1143
/* transfer up to a frame's worth; caller must own lock */
 
1144
static int
 
1145
transfer(struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit,
 
1146
                int *status)
 
1147
{
 
1148
        struct dummy_request    *req;
 
1149
 
 
1150
top:
 
1151
        /* if there's no request queued, the device is NAKing; return */
 
1152
        list_for_each_entry (req, &ep->queue, queue) {
 
1153
                unsigned        host_len, dev_len, len;
 
1154
                int             is_short, to_host;
 
1155
                int             rescan = 0;
 
1156
 
 
1157
                /* 1..N packets of ep->ep.maxpacket each ... the last one
 
1158
                 * may be short (including zero length).
 
1159
                 *
 
1160
                 * writer can send a zlp explicitly (length 0) or implicitly
 
1161
                 * (length mod maxpacket zero, and 'zero' flag); they always
 
1162
                 * terminate reads.
 
1163
                 */
 
1164
                host_len = urb->transfer_buffer_length - urb->actual_length;
 
1165
                dev_len = req->req.length - req->req.actual;
 
1166
                len = min (host_len, dev_len);
 
1167
 
 
1168
                /* FIXME update emulated data toggle too */
 
1169
 
 
1170
                to_host = usb_pipein (urb->pipe);
 
1171
                if (unlikely (len == 0))
 
1172
                        is_short = 1;
 
1173
                else {
 
1174
                        char            *ubuf, *rbuf;
 
1175
 
 
1176
                        /* not enough bandwidth left? */
 
1177
                        if (limit < ep->ep.maxpacket && limit < len)
 
1178
                                break;
 
1179
                        len = min (len, (unsigned) limit);
 
1180
                        if (len == 0)
 
1181
                                break;
 
1182
 
 
1183
                        /* use an extra pass for the final short packet */
 
1184
                        if (len > ep->ep.maxpacket) {
 
1185
                                rescan = 1;
 
1186
                                len -= (len % ep->ep.maxpacket);
 
1187
                        }
 
1188
                        is_short = (len % ep->ep.maxpacket) != 0;
 
1189
 
 
1190
                        /* else transfer packet(s) */
 
1191
                        ubuf = urb->transfer_buffer + urb->actual_length;
 
1192
                        rbuf = req->req.buf + req->req.actual;
 
1193
                        if (to_host)
 
1194
                                memcpy (ubuf, rbuf, len);
 
1195
                        else
 
1196
                                memcpy (rbuf, ubuf, len);
 
1197
                        ep->last_io = jiffies;
 
1198
 
 
1199
                        limit -= len;
 
1200
                        urb->actual_length += len;
 
1201
                        req->req.actual += len;
 
1202
                }
 
1203
 
 
1204
                /* short packets terminate, maybe with overflow/underflow.
 
1205
                 * it's only really an error to write too much.
 
1206
                 *
 
1207
                 * partially filling a buffer optionally blocks queue advances
 
1208
                 * (so completion handlers can clean up the queue) but we don't
 
1209
                 * need to emulate such data-in-flight.
 
1210
                 */
 
1211
                if (is_short) {
 
1212
                        if (host_len == dev_len) {
 
1213
                                req->req.status = 0;
 
1214
                                *status = 0;
 
1215
                        } else if (to_host) {
 
1216
                                req->req.status = 0;
 
1217
                                if (dev_len > host_len)
 
1218
                                        *status = -EOVERFLOW;
 
1219
                                else
 
1220
                                        *status = 0;
 
1221
                        } else if (!to_host) {
 
1222
                                *status = 0;
 
1223
                                if (host_len > dev_len)
 
1224
                                        req->req.status = -EOVERFLOW;
 
1225
                                else
 
1226
                                        req->req.status = 0;
 
1227
                        }
 
1228
 
 
1229
                /* many requests terminate without a short packet */
 
1230
                } else {
 
1231
                        if (req->req.length == req->req.actual
 
1232
                                        && !req->req.zero)
 
1233
                                req->req.status = 0;
 
1234
                        if (urb->transfer_buffer_length == urb->actual_length
 
1235
                                        && !(urb->transfer_flags
 
1236
                                                & URB_ZERO_PACKET))
 
1237
                                *status = 0;
 
1238
                }
 
1239
 
 
1240
                /* device side completion --> continuable */
 
1241
                if (req->req.status != -EINPROGRESS) {
 
1242
                        list_del_init (&req->queue);
 
1243
 
 
1244
                        spin_unlock (&dum->lock);
 
1245
                        req->req.complete (&ep->ep, &req->req);
 
1246
                        spin_lock (&dum->lock);
 
1247
 
 
1248
                        /* requests might have been unlinked... */
 
1249
                        rescan = 1;
 
1250
                }
 
1251
 
 
1252
                /* host side completion --> terminate */
 
1253
                if (*status != -EINPROGRESS)
 
1254
                        break;
 
1255
 
 
1256
                /* rescan to continue with any other queued i/o */
 
1257
                if (rescan)
 
1258
                        goto top;
 
1259
        }
 
1260
        return limit;
 
1261
}
 
1262
 
 
1263
static int periodic_bytes (struct dummy *dum, struct dummy_ep *ep)
 
1264
{
 
1265
        int     limit = ep->ep.maxpacket;
 
1266
 
 
1267
        if (dum->gadget.speed == USB_SPEED_HIGH) {
 
1268
                int     tmp;
 
1269
 
 
1270
                /* high bandwidth mode */
 
1271
                tmp = usb_endpoint_maxp(ep->desc);
 
1272
                tmp = (tmp >> 11) & 0x03;
 
1273
                tmp *= 8 /* applies to entire frame */;
 
1274
                limit += limit * tmp;
 
1275
        }
 
1276
        if (dum->gadget.speed == USB_SPEED_SUPER) {
 
1277
                switch (ep->desc->bmAttributes & 0x03) {
 
1278
                case USB_ENDPOINT_XFER_ISOC:
 
1279
                        /* Sec. 4.4.8.2 USB3.0 Spec */
 
1280
                        limit = 3 * 16 * 1024 * 8;
 
1281
                        break;
 
1282
                case USB_ENDPOINT_XFER_INT:
 
1283
                        /* Sec. 4.4.7.2 USB3.0 Spec */
 
1284
                        limit = 3 * 1024 * 8;
 
1285
                        break;
 
1286
                case USB_ENDPOINT_XFER_BULK:
 
1287
                default:
 
1288
                        break;
 
1289
                }
 
1290
        }
 
1291
        return limit;
 
1292
}
 
1293
 
 
1294
#define is_active(dum_hcd)      ((dum_hcd->port_status & \
 
1295
                (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
 
1296
                        USB_PORT_STAT_SUSPEND)) \
 
1297
                == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
 
1298
 
 
1299
static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address)
 
1300
{
 
1301
        int             i;
 
1302
 
 
1303
        if (!is_active((dum->gadget.speed == USB_SPEED_SUPER ?
 
1304
                        dum->ss_hcd : dum->hs_hcd)))
 
1305
                return NULL;
 
1306
        if ((address & ~USB_DIR_IN) == 0)
 
1307
                return &dum->ep [0];
 
1308
        for (i = 1; i < DUMMY_ENDPOINTS; i++) {
 
1309
                struct dummy_ep *ep = &dum->ep [i];
 
1310
 
 
1311
                if (!ep->desc)
 
1312
                        continue;
 
1313
                if (ep->desc->bEndpointAddress == address)
 
1314
                        return ep;
 
1315
        }
 
1316
        return NULL;
 
1317
}
 
1318
 
 
1319
#undef is_active
 
1320
 
 
1321
#define Dev_Request     (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
 
1322
#define Dev_InRequest   (Dev_Request | USB_DIR_IN)
 
1323
#define Intf_Request    (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
 
1324
#define Intf_InRequest  (Intf_Request | USB_DIR_IN)
 
1325
#define Ep_Request      (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
 
1326
#define Ep_InRequest    (Ep_Request | USB_DIR_IN)
 
1327
 
 
1328
 
 
1329
/**
 
1330
 * handle_control_request() - handles all control transfers
 
1331
 * @dum: pointer to dummy (the_controller)
 
1332
 * @urb: the urb request to handle
 
1333
 * @setup: pointer to the setup data for a USB device control
 
1334
 *       request
 
1335
 * @status: pointer to request handling status
 
1336
 *
 
1337
 * Return 0 - if the request was handled
 
1338
 *        1 - if the request wasn't handles
 
1339
 *        error code on error
 
1340
 */
 
1341
static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb,
 
1342
                                  struct usb_ctrlrequest *setup,
 
1343
                                  int *status)
 
1344
{
 
1345
        struct dummy_ep         *ep2;
 
1346
        struct dummy            *dum = dum_hcd->dum;
 
1347
        int                     ret_val = 1;
 
1348
        unsigned        w_index;
 
1349
        unsigned        w_value;
 
1350
 
 
1351
        w_index = le16_to_cpu(setup->wIndex);
 
1352
        w_value = le16_to_cpu(setup->wValue);
 
1353
        switch (setup->bRequest) {
 
1354
        case USB_REQ_SET_ADDRESS:
 
1355
                if (setup->bRequestType != Dev_Request)
 
1356
                        break;
 
1357
                dum->address = w_value;
 
1358
                *status = 0;
 
1359
                dev_dbg(udc_dev(dum), "set_address = %d\n",
 
1360
                                w_value);
 
1361
                ret_val = 0;
 
1362
                break;
 
1363
        case USB_REQ_SET_FEATURE:
 
1364
                if (setup->bRequestType == Dev_Request) {
 
1365
                        ret_val = 0;
 
1366
                        switch (w_value) {
 
1367
                        case USB_DEVICE_REMOTE_WAKEUP:
 
1368
                                break;
 
1369
                        case USB_DEVICE_B_HNP_ENABLE:
 
1370
                                dum->gadget.b_hnp_enable = 1;
 
1371
                                break;
 
1372
                        case USB_DEVICE_A_HNP_SUPPORT:
 
1373
                                dum->gadget.a_hnp_support = 1;
 
1374
                                break;
 
1375
                        case USB_DEVICE_A_ALT_HNP_SUPPORT:
 
1376
                                dum->gadget.a_alt_hnp_support = 1;
 
1377
                                break;
 
1378
                        case USB_DEVICE_U1_ENABLE:
 
1379
                                if (dummy_hcd_to_hcd(dum_hcd)->speed ==
 
1380
                                    HCD_USB3)
 
1381
                                        w_value = USB_DEV_STAT_U1_ENABLED;
 
1382
                                else
 
1383
                                        ret_val = -EOPNOTSUPP;
 
1384
                                break;
 
1385
                        case USB_DEVICE_U2_ENABLE:
 
1386
                                if (dummy_hcd_to_hcd(dum_hcd)->speed ==
 
1387
                                    HCD_USB3)
 
1388
                                        w_value = USB_DEV_STAT_U2_ENABLED;
 
1389
                                else
 
1390
                                        ret_val = -EOPNOTSUPP;
 
1391
                                break;
 
1392
                        case USB_DEVICE_LTM_ENABLE:
 
1393
                                if (dummy_hcd_to_hcd(dum_hcd)->speed ==
 
1394
                                    HCD_USB3)
 
1395
                                        w_value = USB_DEV_STAT_LTM_ENABLED;
 
1396
                                else
 
1397
                                        ret_val = -EOPNOTSUPP;
 
1398
                                break;
 
1399
                        default:
 
1400
                                ret_val = -EOPNOTSUPP;
 
1401
                        }
 
1402
                        if (ret_val == 0) {
 
1403
                                dum->devstatus |= (1 << w_value);
 
1404
                                *status = 0;
 
1405
                        }
 
1406
                } else if (setup->bRequestType == Ep_Request) {
 
1407
                        /* endpoint halt */
 
1408
                        ep2 = find_endpoint(dum, w_index);
 
1409
                        if (!ep2 || ep2->ep.name == ep0name) {
 
1410
                                ret_val = -EOPNOTSUPP;
 
1411
                                break;
 
1412
                        }
 
1413
                        ep2->halted = 1;
 
1414
                        ret_val = 0;
 
1415
                        *status = 0;
 
1416
                }
 
1417
                break;
 
1418
        case USB_REQ_CLEAR_FEATURE:
 
1419
                if (setup->bRequestType == Dev_Request) {
 
1420
                        ret_val = 0;
 
1421
                        switch (w_value) {
 
1422
                        case USB_DEVICE_REMOTE_WAKEUP:
 
1423
                                w_value = USB_DEVICE_REMOTE_WAKEUP;
 
1424
                                break;
 
1425
                        case USB_DEVICE_U1_ENABLE:
 
1426
                                if (dummy_hcd_to_hcd(dum_hcd)->speed ==
 
1427
                                    HCD_USB3)
 
1428
                                        w_value = USB_DEV_STAT_U1_ENABLED;
 
1429
                                else
 
1430
                                        ret_val = -EOPNOTSUPP;
 
1431
                                break;
 
1432
                        case USB_DEVICE_U2_ENABLE:
 
1433
                                if (dummy_hcd_to_hcd(dum_hcd)->speed ==
 
1434
                                    HCD_USB3)
 
1435
                                        w_value = USB_DEV_STAT_U2_ENABLED;
 
1436
                                else
 
1437
                                        ret_val = -EOPNOTSUPP;
 
1438
                                break;
 
1439
                        case USB_DEVICE_LTM_ENABLE:
 
1440
                                if (dummy_hcd_to_hcd(dum_hcd)->speed ==
 
1441
                                    HCD_USB3)
 
1442
                                        w_value = USB_DEV_STAT_LTM_ENABLED;
 
1443
                                else
 
1444
                                        ret_val = -EOPNOTSUPP;
 
1445
                                break;
 
1446
                        default:
 
1447
                                ret_val = -EOPNOTSUPP;
 
1448
                                break;
 
1449
                        }
 
1450
                        if (ret_val == 0) {
 
1451
                                dum->devstatus &= ~(1 << w_value);
 
1452
                                *status = 0;
 
1453
                        }
 
1454
                } else if (setup->bRequestType == Ep_Request) {
 
1455
                        /* endpoint halt */
 
1456
                        ep2 = find_endpoint(dum, w_index);
 
1457
                        if (!ep2) {
 
1458
                                ret_val = -EOPNOTSUPP;
 
1459
                                break;
 
1460
                        }
 
1461
                        if (!ep2->wedged)
 
1462
                                ep2->halted = 0;
 
1463
                        ret_val = 0;
 
1464
                        *status = 0;
 
1465
                }
 
1466
                break;
 
1467
        case USB_REQ_GET_STATUS:
 
1468
                if (setup->bRequestType == Dev_InRequest
 
1469
                                || setup->bRequestType == Intf_InRequest
 
1470
                                || setup->bRequestType == Ep_InRequest) {
 
1471
                        char *buf;
 
1472
                        /*
 
1473
                         * device: remote wakeup, selfpowered
 
1474
                         * interface: nothing
 
1475
                         * endpoint: halt
 
1476
                         */
 
1477
                        buf = (char *)urb->transfer_buffer;
 
1478
                        if (urb->transfer_buffer_length > 0) {
 
1479
                                if (setup->bRequestType == Ep_InRequest) {
 
1480
                                        ep2 = find_endpoint(dum, w_index);
 
1481
                                        if (!ep2) {
 
1482
                                                ret_val = -EOPNOTSUPP;
 
1483
                                                break;
 
1484
                                        }
 
1485
                                        buf[0] = ep2->halted;
 
1486
                                } else if (setup->bRequestType ==
 
1487
                                           Dev_InRequest) {
 
1488
                                        buf[0] = (u8)dum->devstatus;
 
1489
                                } else
 
1490
                                        buf[0] = 0;
 
1491
                        }
 
1492
                        if (urb->transfer_buffer_length > 1)
 
1493
                                buf[1] = 0;
 
1494
                        urb->actual_length = min_t(u32, 2,
 
1495
                                urb->transfer_buffer_length);
 
1496
                        ret_val = 0;
 
1497
                        *status = 0;
 
1498
                }
 
1499
                break;
 
1500
        }
 
1501
        return ret_val;
 
1502
}
 
1503
 
 
1504
/* drive both sides of the transfers; looks like irq handlers to
 
1505
 * both drivers except the callbacks aren't in_irq().
 
1506
 */
 
1507
static void dummy_timer(unsigned long _dum_hcd)
 
1508
{
 
1509
        struct dummy_hcd        *dum_hcd = (struct dummy_hcd *) _dum_hcd;
 
1510
        struct dummy            *dum = dum_hcd->dum;
 
1511
        struct urbp             *urbp, *tmp;
 
1512
        unsigned long           flags;
 
1513
        int                     limit, total;
 
1514
        int                     i;
 
1515
 
 
1516
        /* simplistic model for one frame's bandwidth */
 
1517
        switch (dum->gadget.speed) {
 
1518
        case USB_SPEED_LOW:
 
1519
                total = 8/*bytes*/ * 12/*packets*/;
 
1520
                break;
 
1521
        case USB_SPEED_FULL:
 
1522
                total = 64/*bytes*/ * 19/*packets*/;
 
1523
                break;
 
1524
        case USB_SPEED_HIGH:
 
1525
                total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
 
1526
                break;
 
1527
        case USB_SPEED_SUPER:
 
1528
                /* Bus speed is 500000 bytes/ms, so use a little less */
 
1529
                total = 490000;
 
1530
                break;
 
1531
        default:
 
1532
                dev_err(dummy_dev(dum_hcd), "bogus device speed\n");
 
1533
                return;
 
1534
        }
 
1535
 
 
1536
        /* FIXME if HZ != 1000 this will probably misbehave ... */
 
1537
 
 
1538
        /* look at each urb queued by the host side driver */
 
1539
        spin_lock_irqsave (&dum->lock, flags);
 
1540
 
 
1541
        if (!dum_hcd->udev) {
 
1542
                dev_err(dummy_dev(dum_hcd),
 
1543
                                "timer fired with no URBs pending?\n");
 
1544
                spin_unlock_irqrestore (&dum->lock, flags);
 
1545
                return;
 
1546
        }
 
1547
 
 
1548
        for (i = 0; i < DUMMY_ENDPOINTS; i++) {
 
1549
                if (!ep_name [i])
 
1550
                        break;
 
1551
                dum->ep [i].already_seen = 0;
 
1552
        }
 
1553
 
 
1554
restart:
 
1555
        list_for_each_entry_safe(urbp, tmp, &dum_hcd->urbp_list, urbp_list) {
 
1556
                struct urb              *urb;
 
1557
                struct dummy_request    *req;
 
1558
                u8                      address;
 
1559
                struct dummy_ep         *ep = NULL;
 
1560
                int                     type;
 
1561
                int                     status = -EINPROGRESS;
 
1562
 
 
1563
                urb = urbp->urb;
 
1564
                if (urb->unlinked)
 
1565
                        goto return_urb;
 
1566
                else if (dum_hcd->rh_state != DUMMY_RH_RUNNING)
 
1567
                        continue;
 
1568
                type = usb_pipetype (urb->pipe);
 
1569
 
 
1570
                /* used up this frame's non-periodic bandwidth?
 
1571
                 * FIXME there's infinite bandwidth for control and
 
1572
                 * periodic transfers ... unrealistic.
 
1573
                 */
 
1574
                if (total <= 0 && type == PIPE_BULK)
 
1575
                        continue;
 
1576
 
 
1577
                /* find the gadget's ep for this request (if configured) */
 
1578
                address = usb_pipeendpoint (urb->pipe);
 
1579
                if (usb_pipein (urb->pipe))
 
1580
                        address |= USB_DIR_IN;
 
1581
                ep = find_endpoint(dum, address);
 
1582
                if (!ep) {
 
1583
                        /* set_configuration() disagreement */
 
1584
                        dev_dbg(dummy_dev(dum_hcd),
 
1585
                                "no ep configured for urb %p\n",
 
1586
                                urb);
 
1587
                        status = -EPROTO;
 
1588
                        goto return_urb;
 
1589
                }
 
1590
 
 
1591
                if (ep->already_seen)
 
1592
                        continue;
 
1593
                ep->already_seen = 1;
 
1594
                if (ep == &dum->ep [0] && urb->error_count) {
 
1595
                        ep->setup_stage = 1;    /* a new urb */
 
1596
                        urb->error_count = 0;
 
1597
                }
 
1598
                if (ep->halted && !ep->setup_stage) {
 
1599
                        /* NOTE: must not be iso! */
 
1600
                        dev_dbg(dummy_dev(dum_hcd), "ep %s halted, urb %p\n",
 
1601
                                        ep->ep.name, urb);
 
1602
                        status = -EPIPE;
 
1603
                        goto return_urb;
 
1604
                }
 
1605
                /* FIXME make sure both ends agree on maxpacket */
 
1606
 
 
1607
                /* handle control requests */
 
1608
                if (ep == &dum->ep [0] && ep->setup_stage) {
 
1609
                        struct usb_ctrlrequest          setup;
 
1610
                        int                             value = 1;
 
1611
 
 
1612
                        setup = *(struct usb_ctrlrequest*) urb->setup_packet;
 
1613
                        /* paranoia, in case of stale queued data */
 
1614
                        list_for_each_entry (req, &ep->queue, queue) {
 
1615
                                list_del_init (&req->queue);
 
1616
                                req->req.status = -EOVERFLOW;
 
1617
                                dev_dbg (udc_dev(dum), "stale req = %p\n",
 
1618
                                                req);
 
1619
 
 
1620
                                spin_unlock (&dum->lock);
 
1621
                                req->req.complete (&ep->ep, &req->req);
 
1622
                                spin_lock (&dum->lock);
 
1623
                                ep->already_seen = 0;
 
1624
                                goto restart;
 
1625
                        }
 
1626
 
 
1627
                        /* gadget driver never sees set_address or operations
 
1628
                         * on standard feature flags.  some hardware doesn't
 
1629
                         * even expose them.
 
1630
                         */
 
1631
                        ep->last_io = jiffies;
 
1632
                        ep->setup_stage = 0;
 
1633
                        ep->halted = 0;
 
1634
 
 
1635
                        value = handle_control_request(dum_hcd, urb, &setup,
 
1636
                                                       &status);
 
1637
 
 
1638
                        /* gadget driver handles all other requests.  block
 
1639
                         * until setup() returns; no reentrancy issues etc.
 
1640
                         */
 
1641
                        if (value > 0) {
 
1642
                                spin_unlock (&dum->lock);
 
1643
                                value = dum->driver->setup (&dum->gadget,
 
1644
                                                &setup);
 
1645
                                spin_lock (&dum->lock);
 
1646
 
 
1647
                                if (value >= 0) {
 
1648
                                        /* no delays (max 64KB data stage) */
 
1649
                                        limit = 64*1024;
 
1650
                                        goto treat_control_like_bulk;
 
1651
                                }
 
1652
                                /* error, see below */
 
1653
                        }
 
1654
 
 
1655
                        if (value < 0) {
 
1656
                                if (value != -EOPNOTSUPP)
 
1657
                                        dev_dbg (udc_dev(dum),
 
1658
                                                "setup --> %d\n",
 
1659
                                                value);
 
1660
                                status = -EPIPE;
 
1661
                                urb->actual_length = 0;
 
1662
                        }
 
1663
 
 
1664
                        goto return_urb;
 
1665
                }
 
1666
 
 
1667
                /* non-control requests */
 
1668
                limit = total;
 
1669
                switch (usb_pipetype (urb->pipe)) {
 
1670
                case PIPE_ISOCHRONOUS:
 
1671
                        /* FIXME is it urb->interval since the last xfer?
 
1672
                         * use urb->iso_frame_desc[i].
 
1673
                         * complete whether or not ep has requests queued.
 
1674
                         * report random errors, to debug drivers.
 
1675
                         */
 
1676
                        limit = max (limit, periodic_bytes (dum, ep));
 
1677
                        status = -ENOSYS;
 
1678
                        break;
 
1679
 
 
1680
                case PIPE_INTERRUPT:
 
1681
                        /* FIXME is it urb->interval since the last xfer?
 
1682
                         * this almost certainly polls too fast.
 
1683
                         */
 
1684
                        limit = max (limit, periodic_bytes (dum, ep));
 
1685
                        /* FALLTHROUGH */
 
1686
 
 
1687
                // case PIPE_BULK:  case PIPE_CONTROL:
 
1688
                default:
 
1689
                treat_control_like_bulk:
 
1690
                        ep->last_io = jiffies;
 
1691
                        total = transfer(dum, urb, ep, limit, &status);
 
1692
                        break;
 
1693
                }
 
1694
 
 
1695
                /* incomplete transfer? */
 
1696
                if (status == -EINPROGRESS)
 
1697
                        continue;
 
1698
 
 
1699
return_urb:
 
1700
                list_del (&urbp->urbp_list);
 
1701
                kfree (urbp);
 
1702
                if (ep)
 
1703
                        ep->already_seen = ep->setup_stage = 0;
 
1704
 
 
1705
                usb_hcd_unlink_urb_from_ep(dummy_hcd_to_hcd(dum_hcd), urb);
 
1706
                spin_unlock (&dum->lock);
 
1707
                usb_hcd_giveback_urb(dummy_hcd_to_hcd(dum_hcd), urb, status);
 
1708
                spin_lock (&dum->lock);
 
1709
 
 
1710
                goto restart;
 
1711
        }
 
1712
 
 
1713
        if (list_empty(&dum_hcd->urbp_list)) {
 
1714
                usb_put_dev(dum_hcd->udev);
 
1715
                dum_hcd->udev = NULL;
 
1716
        } else if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
 
1717
                /* want a 1 msec delay here */
 
1718
                mod_timer(&dum_hcd->timer, jiffies + msecs_to_jiffies(1));
 
1719
        }
 
1720
 
 
1721
        spin_unlock_irqrestore (&dum->lock, flags);
 
1722
}
 
1723
 
 
1724
/*-------------------------------------------------------------------------*/
 
1725
 
 
1726
#define PORT_C_MASK \
 
1727
        ((USB_PORT_STAT_C_CONNECTION \
 
1728
        | USB_PORT_STAT_C_ENABLE \
 
1729
        | USB_PORT_STAT_C_SUSPEND \
 
1730
        | USB_PORT_STAT_C_OVERCURRENT \
 
1731
        | USB_PORT_STAT_C_RESET) << 16)
 
1732
 
 
1733
static int dummy_hub_status (struct usb_hcd *hcd, char *buf)
 
1734
{
 
1735
        struct dummy_hcd        *dum_hcd;
 
1736
        unsigned long           flags;
 
1737
        int                     retval = 0;
 
1738
 
 
1739
        dum_hcd = hcd_to_dummy_hcd(hcd);
 
1740
 
 
1741
        spin_lock_irqsave(&dum_hcd->dum->lock, flags);
 
1742
        if (!HCD_HW_ACCESSIBLE(hcd))
 
1743
                goto done;
 
1744
 
 
1745
        if (dum_hcd->resuming && time_after_eq(jiffies, dum_hcd->re_timeout)) {
 
1746
                dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
 
1747
                dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
 
1748
                set_link_state(dum_hcd);
 
1749
        }
 
1750
 
 
1751
        if ((dum_hcd->port_status & PORT_C_MASK) != 0) {
 
1752
                *buf = (1 << 1);
 
1753
                dev_dbg(dummy_dev(dum_hcd), "port status 0x%08x has changes\n",
 
1754
                                dum_hcd->port_status);
 
1755
                retval = 1;
 
1756
                if (dum_hcd->rh_state == DUMMY_RH_SUSPENDED)
 
1757
                        usb_hcd_resume_root_hub (hcd);
 
1758
        }
 
1759
done:
 
1760
        spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
 
1761
        return retval;
 
1762
}
 
1763
 
 
1764
static inline void
 
1765
ss_hub_descriptor(struct usb_hub_descriptor *desc)
 
1766
{
 
1767
        memset(desc, 0, sizeof *desc);
 
1768
        desc->bDescriptorType = 0x2a;
 
1769
        desc->bDescLength = 12;
 
1770
        desc->wHubCharacteristics = cpu_to_le16(0x0001);
 
1771
        desc->bNbrPorts = 1;
 
1772
        desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/
 
1773
        desc->u.ss.DeviceRemovable = 0xffff;
 
1774
}
 
1775
 
 
1776
static inline void
 
1777
hub_descriptor (struct usb_hub_descriptor *desc)
 
1778
{
 
1779
        memset (desc, 0, sizeof *desc);
 
1780
        desc->bDescriptorType = 0x29;
 
1781
        desc->bDescLength = 9;
 
1782
        desc->wHubCharacteristics = cpu_to_le16(0x0001);
 
1783
        desc->bNbrPorts = 1;
 
1784
        desc->u.hs.DeviceRemovable[0] = 0xff;
 
1785
        desc->u.hs.DeviceRemovable[1] = 0xff;
 
1786
}
 
1787
 
 
1788
static int dummy_hub_control (
 
1789
        struct usb_hcd  *hcd,
 
1790
        u16             typeReq,
 
1791
        u16             wValue,
 
1792
        u16             wIndex,
 
1793
        char            *buf,
 
1794
        u16             wLength
 
1795
) {
 
1796
        struct dummy_hcd *dum_hcd;
 
1797
        int             retval = 0;
 
1798
        unsigned long   flags;
 
1799
 
 
1800
        if (!HCD_HW_ACCESSIBLE(hcd))
 
1801
                return -ETIMEDOUT;
 
1802
 
 
1803
        dum_hcd = hcd_to_dummy_hcd(hcd);
 
1804
 
 
1805
        spin_lock_irqsave(&dum_hcd->dum->lock, flags);
 
1806
        switch (typeReq) {
 
1807
        case ClearHubFeature:
 
1808
                break;
 
1809
        case ClearPortFeature:
 
1810
                switch (wValue) {
 
1811
                case USB_PORT_FEAT_SUSPEND:
 
1812
                        if (hcd->speed == HCD_USB3) {
 
1813
                                dev_dbg(dummy_dev(dum_hcd),
 
1814
                                         "USB_PORT_FEAT_SUSPEND req not "
 
1815
                                         "supported for USB 3.0 roothub\n");
 
1816
                                goto error;
 
1817
                        }
 
1818
                        if (dum_hcd->port_status & USB_PORT_STAT_SUSPEND) {
 
1819
                                /* 20msec resume signaling */
 
1820
                                dum_hcd->resuming = 1;
 
1821
                                dum_hcd->re_timeout = jiffies +
 
1822
                                                msecs_to_jiffies(20);
 
1823
                        }
 
1824
                        break;
 
1825
                case USB_PORT_FEAT_POWER:
 
1826
                        if (hcd->speed == HCD_USB3) {
 
1827
                                if (dum_hcd->port_status & USB_PORT_STAT_POWER)
 
1828
                                        dev_dbg(dummy_dev(dum_hcd),
 
1829
                                                "power-off\n");
 
1830
                        } else
 
1831
                                if (dum_hcd->port_status &
 
1832
                                                        USB_SS_PORT_STAT_POWER)
 
1833
                                        dev_dbg(dummy_dev(dum_hcd),
 
1834
                                                "power-off\n");
 
1835
                        /* FALLS THROUGH */
 
1836
                default:
 
1837
                        dum_hcd->port_status &= ~(1 << wValue);
 
1838
                        set_link_state(dum_hcd);
 
1839
                }
 
1840
                break;
 
1841
        case GetHubDescriptor:
 
1842
                if (hcd->speed == HCD_USB3 &&
 
1843
                                (wLength < USB_DT_SS_HUB_SIZE ||
 
1844
                                 wValue != (USB_DT_SS_HUB << 8))) {
 
1845
                        dev_dbg(dummy_dev(dum_hcd),
 
1846
                                "Wrong hub descriptor type for "
 
1847
                                "USB 3.0 roothub.\n");
 
1848
                        goto error;
 
1849
                }
 
1850
                if (hcd->speed == HCD_USB3)
 
1851
                        ss_hub_descriptor((struct usb_hub_descriptor *) buf);
 
1852
                else
 
1853
                        hub_descriptor((struct usb_hub_descriptor *) buf);
 
1854
                break;
 
1855
        case GetHubStatus:
 
1856
                *(__le32 *) buf = cpu_to_le32 (0);
 
1857
                break;
 
1858
        case GetPortStatus:
 
1859
                if (wIndex != 1)
 
1860
                        retval = -EPIPE;
 
1861
 
 
1862
                /* whoever resets or resumes must GetPortStatus to
 
1863
                 * complete it!!
 
1864
                 */
 
1865
                if (dum_hcd->resuming &&
 
1866
                                time_after_eq(jiffies, dum_hcd->re_timeout)) {
 
1867
                        dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
 
1868
                        dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
 
1869
                }
 
1870
                if ((dum_hcd->port_status & USB_PORT_STAT_RESET) != 0 &&
 
1871
                                time_after_eq(jiffies, dum_hcd->re_timeout)) {
 
1872
                        dum_hcd->port_status |= (USB_PORT_STAT_C_RESET << 16);
 
1873
                        dum_hcd->port_status &= ~USB_PORT_STAT_RESET;
 
1874
                        if (dum_hcd->dum->pullup) {
 
1875
                                dum_hcd->port_status |= USB_PORT_STAT_ENABLE;
 
1876
 
 
1877
                                if (hcd->speed < HCD_USB3) {
 
1878
                                        switch (dum_hcd->dum->gadget.speed) {
 
1879
                                        case USB_SPEED_HIGH:
 
1880
                                                dum_hcd->port_status |=
 
1881
                                                      USB_PORT_STAT_HIGH_SPEED;
 
1882
                                                break;
 
1883
                                        case USB_SPEED_LOW:
 
1884
                                                dum_hcd->dum->gadget.ep0->
 
1885
                                                        maxpacket = 8;
 
1886
                                                dum_hcd->port_status |=
 
1887
                                                        USB_PORT_STAT_LOW_SPEED;
 
1888
                                                break;
 
1889
                                        default:
 
1890
                                                dum_hcd->dum->gadget.speed =
 
1891
                                                        USB_SPEED_FULL;
 
1892
                                                break;
 
1893
                                        }
 
1894
                                }
 
1895
                        }
 
1896
                }
 
1897
                set_link_state(dum_hcd);
 
1898
                ((__le16 *) buf)[0] = cpu_to_le16 (dum_hcd->port_status);
 
1899
                ((__le16 *) buf)[1] = cpu_to_le16 (dum_hcd->port_status >> 16);
 
1900
                break;
 
1901
        case SetHubFeature:
 
1902
                retval = -EPIPE;
 
1903
                break;
 
1904
        case SetPortFeature:
 
1905
                switch (wValue) {
 
1906
                case USB_PORT_FEAT_LINK_STATE:
 
1907
                        if (hcd->speed != HCD_USB3) {
 
1908
                                dev_dbg(dummy_dev(dum_hcd),
 
1909
                                         "USB_PORT_FEAT_LINK_STATE req not "
 
1910
                                         "supported for USB 2.0 roothub\n");
 
1911
                                goto error;
 
1912
                        }
 
1913
                        /*
 
1914
                         * Since this is dummy we don't have an actual link so
 
1915
                         * there is nothing to do for the SET_LINK_STATE cmd
 
1916
                         */
 
1917
                        break;
 
1918
                case USB_PORT_FEAT_U1_TIMEOUT:
 
1919
                case USB_PORT_FEAT_U2_TIMEOUT:
 
1920
                        /* TODO: add suspend/resume support! */
 
1921
                        if (hcd->speed != HCD_USB3) {
 
1922
                                dev_dbg(dummy_dev(dum_hcd),
 
1923
                                         "USB_PORT_FEAT_U1/2_TIMEOUT req not "
 
1924
                                         "supported for USB 2.0 roothub\n");
 
1925
                                goto error;
 
1926
                        }
 
1927
                        break;
 
1928
                case USB_PORT_FEAT_SUSPEND:
 
1929
                        /* Applicable only for USB2.0 hub */
 
1930
                        if (hcd->speed == HCD_USB3) {
 
1931
                                dev_dbg(dummy_dev(dum_hcd),
 
1932
                                         "USB_PORT_FEAT_SUSPEND req not "
 
1933
                                         "supported for USB 3.0 roothub\n");
 
1934
                                goto error;
 
1935
                        }
 
1936
                        if (dum_hcd->active) {
 
1937
                                dum_hcd->port_status |= USB_PORT_STAT_SUSPEND;
 
1938
 
 
1939
                                /* HNP would happen here; for now we
 
1940
                                 * assume b_bus_req is always true.
 
1941
                                 */
 
1942
                                set_link_state(dum_hcd);
 
1943
                                if (((1 << USB_DEVICE_B_HNP_ENABLE)
 
1944
                                                & dum_hcd->dum->devstatus) != 0)
 
1945
                                        dev_dbg(dummy_dev(dum_hcd),
 
1946
                                                        "no HNP yet!\n");
 
1947
                        }
 
1948
                        break;
 
1949
                case USB_PORT_FEAT_POWER:
 
1950
                        if (hcd->speed == HCD_USB3)
 
1951
                                dum_hcd->port_status |= USB_SS_PORT_STAT_POWER;
 
1952
                        else
 
1953
                                dum_hcd->port_status |= USB_PORT_STAT_POWER;
 
1954
                        set_link_state(dum_hcd);
 
1955
                        break;
 
1956
                case USB_PORT_FEAT_BH_PORT_RESET:
 
1957
                        /* Applicable only for USB3.0 hub */
 
1958
                        if (hcd->speed != HCD_USB3) {
 
1959
                                dev_dbg(dummy_dev(dum_hcd),
 
1960
                                         "USB_PORT_FEAT_BH_PORT_RESET req not "
 
1961
                                         "supported for USB 2.0 roothub\n");
 
1962
                                goto error;
 
1963
                        }
 
1964
                        /* FALLS THROUGH */
 
1965
                case USB_PORT_FEAT_RESET:
 
1966
                        /* if it's already enabled, disable */
 
1967
                        if (hcd->speed == HCD_USB3) {
 
1968
                                dum_hcd->port_status = 0;
 
1969
                                dum_hcd->port_status =
 
1970
                                        (USB_SS_PORT_STAT_POWER |
 
1971
                                         USB_PORT_STAT_CONNECTION |
 
1972
                                         USB_PORT_STAT_RESET);
 
1973
                        } else
 
1974
                                dum_hcd->port_status &= ~(USB_PORT_STAT_ENABLE
 
1975
                                        | USB_PORT_STAT_LOW_SPEED
 
1976
                                        | USB_PORT_STAT_HIGH_SPEED);
 
1977
                        /*
 
1978
                         * We want to reset device status. All but the
 
1979
                         * Self powered feature
 
1980
                         */
 
1981
                        dum_hcd->dum->devstatus &=
 
1982
                                (1 << USB_DEVICE_SELF_POWERED);
 
1983
                        /*
 
1984
                         * FIXME USB3.0: what is the correct reset signaling
 
1985
                         * interval? Is it still 50msec as for HS?
 
1986
                         */
 
1987
                        dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50);
 
1988
                        /* FALLS THROUGH */
 
1989
                default:
 
1990
                        if (hcd->speed == HCD_USB3) {
 
1991
                                if ((dum_hcd->port_status &
 
1992
                                     USB_SS_PORT_STAT_POWER) != 0) {
 
1993
                                        dum_hcd->port_status |= (1 << wValue);
 
1994
                                        set_link_state(dum_hcd);
 
1995
                                }
 
1996
                        } else
 
1997
                                if ((dum_hcd->port_status &
 
1998
                                     USB_PORT_STAT_POWER) != 0) {
 
1999
                                        dum_hcd->port_status |= (1 << wValue);
 
2000
                                        set_link_state(dum_hcd);
 
2001
                                }
 
2002
                }
 
2003
                break;
 
2004
        case GetPortErrorCount:
 
2005
                if (hcd->speed != HCD_USB3) {
 
2006
                        dev_dbg(dummy_dev(dum_hcd),
 
2007
                                 "GetPortErrorCount req not "
 
2008
                                 "supported for USB 2.0 roothub\n");
 
2009
                        goto error;
 
2010
                }
 
2011
                /* We'll always return 0 since this is a dummy hub */
 
2012
                *(__le32 *) buf = cpu_to_le32(0);
 
2013
                break;
 
2014
        case SetHubDepth:
 
2015
                if (hcd->speed != HCD_USB3) {
 
2016
                        dev_dbg(dummy_dev(dum_hcd),
 
2017
                                 "SetHubDepth req not supported for "
 
2018
                                 "USB 2.0 roothub\n");
 
2019
                        goto error;
 
2020
                }
 
2021
                break;
 
2022
        default:
 
2023
                dev_dbg(dummy_dev(dum_hcd),
 
2024
                        "hub control req%04x v%04x i%04x l%d\n",
 
2025
                        typeReq, wValue, wIndex, wLength);
 
2026
error:
 
2027
                /* "protocol stall" on error */
 
2028
                retval = -EPIPE;
 
2029
        }
 
2030
        spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
 
2031
 
 
2032
        if ((dum_hcd->port_status & PORT_C_MASK) != 0)
 
2033
                usb_hcd_poll_rh_status (hcd);
 
2034
        return retval;
 
2035
}
 
2036
 
 
2037
static int dummy_bus_suspend (struct usb_hcd *hcd)
 
2038
{
 
2039
        struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
 
2040
 
 
2041
        dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__);
 
2042
 
 
2043
        spin_lock_irq(&dum_hcd->dum->lock);
 
2044
        dum_hcd->rh_state = DUMMY_RH_SUSPENDED;
 
2045
        set_link_state(dum_hcd);
 
2046
        hcd->state = HC_STATE_SUSPENDED;
 
2047
        spin_unlock_irq(&dum_hcd->dum->lock);
 
2048
        return 0;
 
2049
}
 
2050
 
 
2051
static int dummy_bus_resume (struct usb_hcd *hcd)
 
2052
{
 
2053
        struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
 
2054
        int rc = 0;
 
2055
 
 
2056
        dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__);
 
2057
 
 
2058
        spin_lock_irq(&dum_hcd->dum->lock);
 
2059
        if (!HCD_HW_ACCESSIBLE(hcd)) {
 
2060
                rc = -ESHUTDOWN;
 
2061
        } else {
 
2062
                dum_hcd->rh_state = DUMMY_RH_RUNNING;
 
2063
                set_link_state(dum_hcd);
 
2064
                if (!list_empty(&dum_hcd->urbp_list))
 
2065
                        mod_timer(&dum_hcd->timer, jiffies);
 
2066
                hcd->state = HC_STATE_RUNNING;
 
2067
        }
 
2068
        spin_unlock_irq(&dum_hcd->dum->lock);
 
2069
        return rc;
 
2070
}
 
2071
 
 
2072
/*-------------------------------------------------------------------------*/
 
2073
 
 
2074
static inline ssize_t
 
2075
show_urb (char *buf, size_t size, struct urb *urb)
 
2076
{
 
2077
        int ep = usb_pipeendpoint (urb->pipe);
 
2078
 
 
2079
        return snprintf (buf, size,
 
2080
                "urb/%p %s ep%d%s%s len %d/%d\n",
 
2081
                urb,
 
2082
                ({ char *s;
 
2083
                 switch (urb->dev->speed) {
 
2084
                 case USB_SPEED_LOW:
 
2085
                        s = "ls";
 
2086
                        break;
 
2087
                 case USB_SPEED_FULL:
 
2088
                        s = "fs";
 
2089
                        break;
 
2090
                 case USB_SPEED_HIGH:
 
2091
                        s = "hs";
 
2092
                        break;
 
2093
                 case USB_SPEED_SUPER:
 
2094
                        s = "ss";
 
2095
                        break;
 
2096
                 default:
 
2097
                        s = "?";
 
2098
                        break;
 
2099
                 }; s; }),
 
2100
                ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "",
 
2101
                ({ char *s; \
 
2102
                 switch (usb_pipetype (urb->pipe)) { \
 
2103
                 case PIPE_CONTROL: \
 
2104
                        s = ""; \
 
2105
                        break; \
 
2106
                 case PIPE_BULK: \
 
2107
                        s = "-bulk"; \
 
2108
                        break; \
 
2109
                 case PIPE_INTERRUPT: \
 
2110
                        s = "-int"; \
 
2111
                        break; \
 
2112
                 default: \
 
2113
                        s = "-iso"; \
 
2114
                        break; \
 
2115
                }; s;}),
 
2116
                urb->actual_length, urb->transfer_buffer_length);
 
2117
}
 
2118
 
 
2119
static ssize_t
 
2120
show_urbs (struct device *dev, struct device_attribute *attr, char *buf)
 
2121
{
 
2122
        struct usb_hcd          *hcd = dev_get_drvdata (dev);
 
2123
        struct dummy_hcd        *dum_hcd = hcd_to_dummy_hcd(hcd);
 
2124
        struct urbp             *urbp;
 
2125
        size_t                  size = 0;
 
2126
        unsigned long           flags;
 
2127
 
 
2128
        spin_lock_irqsave(&dum_hcd->dum->lock, flags);
 
2129
        list_for_each_entry(urbp, &dum_hcd->urbp_list, urbp_list) {
 
2130
                size_t          temp;
 
2131
 
 
2132
                temp = show_urb (buf, PAGE_SIZE - size, urbp->urb);
 
2133
                buf += temp;
 
2134
                size += temp;
 
2135
        }
 
2136
        spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
 
2137
 
 
2138
        return size;
 
2139
}
 
2140
static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL);
 
2141
 
 
2142
static int dummy_start_ss(struct dummy_hcd *dum_hcd)
 
2143
{
 
2144
        init_timer(&dum_hcd->timer);
 
2145
        dum_hcd->timer.function = dummy_timer;
 
2146
        dum_hcd->timer.data = (unsigned long)dum_hcd;
 
2147
        dum_hcd->rh_state = DUMMY_RH_RUNNING;
 
2148
        INIT_LIST_HEAD(&dum_hcd->urbp_list);
 
2149
        dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET;
 
2150
        dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING;
 
2151
        dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1;
 
2152
#ifdef CONFIG_USB_OTG
 
2153
        dummy_hcd_to_hcd(dum_hcd)->self.otg_port = 1;
 
2154
#endif
 
2155
        return 0;
 
2156
 
 
2157
        /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
 
2158
        return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
 
2159
}
 
2160
 
 
2161
static int dummy_start(struct usb_hcd *hcd)
 
2162
{
 
2163
        struct dummy_hcd        *dum_hcd = hcd_to_dummy_hcd(hcd);
 
2164
 
 
2165
        /*
 
2166
         * MASTER side init ... we emulate a root hub that'll only ever
 
2167
         * talk to one device (the slave side).  Also appears in sysfs,
 
2168
         * just like more familiar pci-based HCDs.
 
2169
         */
 
2170
        if (!usb_hcd_is_primary_hcd(hcd))
 
2171
                return dummy_start_ss(dum_hcd);
 
2172
 
 
2173
        spin_lock_init(&dum_hcd->dum->lock);
 
2174
        init_timer(&dum_hcd->timer);
 
2175
        dum_hcd->timer.function = dummy_timer;
 
2176
        dum_hcd->timer.data = (unsigned long)dum_hcd;
 
2177
        dum_hcd->rh_state = DUMMY_RH_RUNNING;
 
2178
 
 
2179
        INIT_LIST_HEAD(&dum_hcd->urbp_list);
 
2180
 
 
2181
        hcd->power_budget = POWER_BUDGET;
 
2182
        hcd->state = HC_STATE_RUNNING;
 
2183
        hcd->uses_new_polling = 1;
 
2184
 
 
2185
#ifdef CONFIG_USB_OTG
 
2186
        hcd->self.otg_port = 1;
 
2187
#endif
 
2188
 
 
2189
        /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
 
2190
        return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
 
2191
}
 
2192
 
 
2193
static void dummy_stop (struct usb_hcd *hcd)
 
2194
{
 
2195
        struct dummy            *dum;
 
2196
 
 
2197
        dum = (hcd_to_dummy_hcd(hcd))->dum;
 
2198
        device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs);
 
2199
        usb_gadget_unregister_driver(dum->driver);
 
2200
        dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n");
 
2201
}
 
2202
 
 
2203
/*-------------------------------------------------------------------------*/
 
2204
 
 
2205
static int dummy_h_get_frame (struct usb_hcd *hcd)
 
2206
{
 
2207
        return dummy_g_get_frame (NULL);
 
2208
}
 
2209
 
 
2210
static int dummy_setup(struct usb_hcd *hcd)
 
2211
{
 
2212
        if (usb_hcd_is_primary_hcd(hcd)) {
 
2213
                the_controller.hs_hcd = hcd_to_dummy_hcd(hcd);
 
2214
                the_controller.hs_hcd->dum = &the_controller;
 
2215
                /*
 
2216
                 * Mark the first roothub as being USB 2.0.
 
2217
                 * The USB 3.0 roothub will be registered later by
 
2218
                 * dummy_hcd_probe()
 
2219
                 */
 
2220
                hcd->speed = HCD_USB2;
 
2221
                hcd->self.root_hub->speed = USB_SPEED_HIGH;
 
2222
        } else {
 
2223
                the_controller.ss_hcd = hcd_to_dummy_hcd(hcd);
 
2224
                the_controller.ss_hcd->dum = &the_controller;
 
2225
                hcd->speed = HCD_USB3;
 
2226
                hcd->self.root_hub->speed = USB_SPEED_SUPER;
 
2227
        }
 
2228
        return 0;
 
2229
}
 
2230
 
 
2231
/* Change a group of bulk endpoints to support multiple stream IDs */
 
2232
int dummy_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev,
 
2233
        struct usb_host_endpoint **eps, unsigned int num_eps,
 
2234
        unsigned int num_streams, gfp_t mem_flags)
 
2235
{
 
2236
        if (hcd->speed != HCD_USB3)
 
2237
                dev_dbg(dummy_dev(hcd_to_dummy_hcd(hcd)),
 
2238
                        "%s() - ERROR! Not supported for USB2.0 roothub\n",
 
2239
                        __func__);
 
2240
        return 0;
 
2241
}
 
2242
 
 
2243
/* Reverts a group of bulk endpoints back to not using stream IDs. */
 
2244
int dummy_free_streams(struct usb_hcd *hcd, struct usb_device *udev,
 
2245
        struct usb_host_endpoint **eps, unsigned int num_eps,
 
2246
        gfp_t mem_flags)
 
2247
{
 
2248
        if (hcd->speed != HCD_USB3)
 
2249
                dev_dbg(dummy_dev(hcd_to_dummy_hcd(hcd)),
 
2250
                        "%s() - ERROR! Not supported for USB2.0 roothub\n",
 
2251
                        __func__);
 
2252
        return 0;
 
2253
}
 
2254
 
 
2255
static struct hc_driver dummy_hcd = {
 
2256
        .description =          (char *) driver_name,
 
2257
        .product_desc =         "Dummy host controller",
 
2258
        .hcd_priv_size =        sizeof(struct dummy_hcd),
 
2259
 
 
2260
        .flags =                HCD_USB3 | HCD_SHARED,
 
2261
 
 
2262
        .reset =                dummy_setup,
 
2263
        .start =                dummy_start,
 
2264
        .stop =                 dummy_stop,
 
2265
 
 
2266
        .urb_enqueue =          dummy_urb_enqueue,
 
2267
        .urb_dequeue =          dummy_urb_dequeue,
 
2268
 
 
2269
        .get_frame_number =     dummy_h_get_frame,
 
2270
 
 
2271
        .hub_status_data =      dummy_hub_status,
 
2272
        .hub_control =          dummy_hub_control,
 
2273
        .bus_suspend =          dummy_bus_suspend,
 
2274
        .bus_resume =           dummy_bus_resume,
 
2275
 
 
2276
        .alloc_streams =        dummy_alloc_streams,
 
2277
        .free_streams =         dummy_free_streams,
 
2278
};
 
2279
 
 
2280
static int dummy_hcd_probe(struct platform_device *pdev)
 
2281
{
 
2282
        struct usb_hcd          *hs_hcd;
 
2283
        struct usb_hcd          *ss_hcd;
 
2284
        int                     retval;
 
2285
 
 
2286
        dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
 
2287
 
 
2288
        if (!mod_data.is_super_speed)
 
2289
                dummy_hcd.flags = HCD_USB2;
 
2290
        hs_hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev));
 
2291
        if (!hs_hcd)
 
2292
                return -ENOMEM;
 
2293
        hs_hcd->has_tt = 1;
 
2294
 
 
2295
        retval = usb_add_hcd(hs_hcd, 0, 0);
 
2296
        if (retval != 0) {
 
2297
                usb_put_hcd(hs_hcd);
 
2298
                return retval;
 
2299
        }
 
2300
 
 
2301
        if (mod_data.is_super_speed) {
 
2302
                ss_hcd = usb_create_shared_hcd(&dummy_hcd, &pdev->dev,
 
2303
                                        dev_name(&pdev->dev), hs_hcd);
 
2304
                if (!ss_hcd) {
 
2305
                        retval = -ENOMEM;
 
2306
                        goto dealloc_usb2_hcd;
 
2307
                }
 
2308
 
 
2309
                retval = usb_add_hcd(ss_hcd, 0, 0);
 
2310
                if (retval)
 
2311
                        goto put_usb3_hcd;
 
2312
        }
 
2313
        return 0;
 
2314
 
 
2315
put_usb3_hcd:
 
2316
        usb_put_hcd(ss_hcd);
 
2317
dealloc_usb2_hcd:
 
2318
        usb_put_hcd(hs_hcd);
 
2319
        the_controller.hs_hcd = the_controller.ss_hcd = NULL;
 
2320
        return retval;
 
2321
}
 
2322
 
 
2323
static int dummy_hcd_remove(struct platform_device *pdev)
 
2324
{
 
2325
        struct dummy            *dum;
 
2326
 
 
2327
        dum = (hcd_to_dummy_hcd(platform_get_drvdata(pdev)))->dum;
 
2328
 
 
2329
        if (dum->ss_hcd) {
 
2330
                usb_remove_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
 
2331
                usb_put_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
 
2332
        }
 
2333
 
 
2334
        usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
 
2335
        usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
 
2336
 
 
2337
        the_controller.hs_hcd = NULL;
 
2338
        the_controller.ss_hcd = NULL;
 
2339
 
 
2340
        return 0;
 
2341
}
 
2342
 
 
2343
static int dummy_hcd_suspend (struct platform_device *pdev, pm_message_t state)
 
2344
{
 
2345
        struct usb_hcd          *hcd;
 
2346
        struct dummy_hcd        *dum_hcd;
 
2347
        int                     rc = 0;
 
2348
 
 
2349
        dev_dbg (&pdev->dev, "%s\n", __func__);
 
2350
 
 
2351
        hcd = platform_get_drvdata (pdev);
 
2352
        dum_hcd = hcd_to_dummy_hcd(hcd);
 
2353
        if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
 
2354
                dev_warn(&pdev->dev, "Root hub isn't suspended!\n");
 
2355
                rc = -EBUSY;
 
2356
        } else
 
2357
                clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 
2358
        return rc;
 
2359
}
 
2360
 
 
2361
static int dummy_hcd_resume (struct platform_device *pdev)
 
2362
{
 
2363
        struct usb_hcd          *hcd;
 
2364
 
 
2365
        dev_dbg (&pdev->dev, "%s\n", __func__);
 
2366
 
 
2367
        hcd = platform_get_drvdata (pdev);
 
2368
        set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 
2369
        usb_hcd_poll_rh_status (hcd);
 
2370
        return 0;
 
2371
}
 
2372
 
 
2373
static struct platform_driver dummy_hcd_driver = {
 
2374
        .probe          = dummy_hcd_probe,
 
2375
        .remove         = dummy_hcd_remove,
 
2376
        .suspend        = dummy_hcd_suspend,
 
2377
        .resume         = dummy_hcd_resume,
 
2378
        .driver         = {
 
2379
                .name   = (char *) driver_name,
 
2380
                .owner  = THIS_MODULE,
 
2381
        },
 
2382
};
 
2383
 
 
2384
/*-------------------------------------------------------------------------*/
 
2385
 
 
2386
static struct platform_device *the_udc_pdev;
 
2387
static struct platform_device *the_hcd_pdev;
 
2388
 
 
2389
static int __init init (void)
 
2390
{
 
2391
        int     retval = -ENOMEM;
 
2392
 
 
2393
        if (usb_disabled ())
 
2394
                return -ENODEV;
 
2395
 
 
2396
        if (!mod_data.is_high_speed && mod_data.is_super_speed)
 
2397
                return -EINVAL;
 
2398
 
 
2399
        the_hcd_pdev = platform_device_alloc(driver_name, -1);
 
2400
        if (!the_hcd_pdev)
 
2401
                return retval;
 
2402
        the_udc_pdev = platform_device_alloc(gadget_name, -1);
 
2403
        if (!the_udc_pdev)
 
2404
                goto err_alloc_udc;
 
2405
 
 
2406
        retval = platform_driver_register(&dummy_hcd_driver);
 
2407
        if (retval < 0)
 
2408
                goto err_register_hcd_driver;
 
2409
        retval = platform_driver_register(&dummy_udc_driver);
 
2410
        if (retval < 0)
 
2411
                goto err_register_udc_driver;
 
2412
 
 
2413
        retval = platform_device_add(the_hcd_pdev);
 
2414
        if (retval < 0)
 
2415
                goto err_add_hcd;
 
2416
        if (!the_controller.hs_hcd ||
 
2417
            (!the_controller.ss_hcd && mod_data.is_super_speed)) {
 
2418
                /*
 
2419
                 * The hcd was added successfully but its probe function failed
 
2420
                 * for some reason.
 
2421
                 */
 
2422
                retval = -EINVAL;
 
2423
                goto err_add_udc;
 
2424
        }
 
2425
        retval = platform_device_add(the_udc_pdev);
 
2426
        if (retval < 0)
 
2427
                goto err_add_udc;
 
2428
        if (!platform_get_drvdata(the_udc_pdev)) {
 
2429
                /*
 
2430
                 * The udc was added successfully but its probe function failed
 
2431
                 * for some reason.
 
2432
                 */
 
2433
                retval = -EINVAL;
 
2434
                goto err_probe_udc;
 
2435
        }
 
2436
        return retval;
 
2437
 
 
2438
err_probe_udc:
 
2439
        platform_device_del(the_udc_pdev);
 
2440
err_add_udc:
 
2441
        platform_device_del(the_hcd_pdev);
 
2442
err_add_hcd:
 
2443
        platform_driver_unregister(&dummy_udc_driver);
 
2444
err_register_udc_driver:
 
2445
        platform_driver_unregister(&dummy_hcd_driver);
 
2446
err_register_hcd_driver:
 
2447
        platform_device_put(the_udc_pdev);
 
2448
err_alloc_udc:
 
2449
        platform_device_put(the_hcd_pdev);
 
2450
        return retval;
 
2451
}
 
2452
module_init (init);
 
2453
 
 
2454
static void __exit cleanup (void)
 
2455
{
 
2456
        platform_device_unregister(the_udc_pdev);
 
2457
        platform_device_unregister(the_hcd_pdev);
 
2458
        platform_driver_unregister(&dummy_udc_driver);
 
2459
        platform_driver_unregister(&dummy_hcd_driver);
 
2460
}
 
2461
module_exit (cleanup);