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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 */
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/module.h>
29#include <linux/kernel.h>
30#include <linux/delay.h>
31#include <linux/ioport.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <linux/errno.h>
34#include <linux/init.h>
35#include <linux/timer.h>
36#include <linux/list.h>
37#include <linux/interrupt.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010038#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <linux/usb.h>
David Brownell9454a572007-10-04 18:05:17 -070040#include <linux/usb/gadget.h>
Eric Lescouet27729aa2010-04-24 23:21:52 +020041#include <linux/usb/hcd.h>
Sebastian Andrzej Siewior14fce332012-01-09 19:30:50 +010042#include <linux/scatterlist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
44#include <asm/byteorder.h>
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +010045#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <asm/irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <asm/unaligned.h>
48
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#define DRIVER_DESC "USB Host+Gadget Emulator"
Alan Stern391eca92005-05-10 15:34:16 -040050#define DRIVER_VERSION "02 May 2005"
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Alan Sterncaf29f62007-12-06 11:10:39 -050052#define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */
53
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +010054static const char driver_name[] = "dummy_hcd";
55static const char driver_desc[] = "USB Host+Gadget Emulator";
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +010057static const char gadget_name[] = "dummy_udc";
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +010059MODULE_DESCRIPTION(DRIVER_DESC);
60MODULE_AUTHOR("David Brownell");
61MODULE_LICENSE("GPL");
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +030063struct dummy_hcd_module_parameters {
64 bool is_super_speed;
Tatyana Brokhman7eca4c52011-06-29 16:41:53 +030065 bool is_high_speed;
Sebastian Andrzej Siewiorc7a1db42012-10-29 18:09:55 +010066 unsigned int num;
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +030067};
68
69static struct dummy_hcd_module_parameters mod_data = {
Tatyana Brokhman7eca4c52011-06-29 16:41:53 +030070 .is_super_speed = false,
71 .is_high_speed = true,
Sebastian Andrzej Siewiorc7a1db42012-10-29 18:09:55 +010072 .num = 1,
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +030073};
74module_param_named(is_super_speed, mod_data.is_super_speed, bool, S_IRUGO);
75MODULE_PARM_DESC(is_super_speed, "true to simulate SuperSpeed connection");
Tatyana Brokhman7eca4c52011-06-29 16:41:53 +030076module_param_named(is_high_speed, mod_data.is_high_speed, bool, S_IRUGO);
77MODULE_PARM_DESC(is_high_speed, "true to simulate HighSpeed connection");
Sebastian Andrzej Siewiorc7a1db42012-10-29 18:09:55 +010078module_param_named(num, mod_data.num, uint, S_IRUGO);
79MODULE_PARM_DESC(num, "number of emulated controllers");
Linus Torvalds1da177e2005-04-16 15:20:36 -070080/*-------------------------------------------------------------------------*/
81
82/* gadget side driver data structres */
83struct dummy_ep {
84 struct list_head queue;
85 unsigned long last_io; /* jiffies timestamp */
86 struct usb_gadget *gadget;
87 const struct usb_endpoint_descriptor *desc;
88 struct usb_ep ep;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +010089 unsigned halted:1;
90 unsigned wedged:1;
91 unsigned already_seen:1;
92 unsigned setup_stage:1;
Sebastian Andrzej Siewiora54c9792012-01-13 21:51:47 +010093 unsigned stream_en:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094};
95
96struct dummy_request {
97 struct list_head queue; /* ep's requests */
98 struct usb_request req;
99};
100
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100101static inline struct dummy_ep *usb_ep_to_dummy_ep(struct usb_ep *_ep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102{
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100103 return container_of(_ep, struct dummy_ep, ep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104}
105
106static inline struct dummy_request *usb_request_to_dummy_request
107 (struct usb_request *_req)
108{
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100109 return container_of(_req, struct dummy_request, req);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110}
111
112/*-------------------------------------------------------------------------*/
113
114/*
115 * Every device has ep0 for control requests, plus up to 30 more endpoints,
116 * in one of two types:
117 *
118 * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint
119 * number can be changed. Names like "ep-a" are used for this type.
120 *
121 * - Fixed Function: in other cases. some characteristics may be mutable;
122 * that'd be hardware-specific. Names like "ep12out-bulk" are used.
123 *
124 * Gadget drivers are responsible for not setting up conflicting endpoint
125 * configurations, illegal or unsupported packet lengths, and so on.
126 */
127
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100128static const char ep0name[] = "ep0";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100130static const char *const ep_name[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 ep0name, /* everyone has ep0 */
132
Sebastian Andrzej Siewior1d166382012-11-20 13:23:15 +0100133 /* act like a pxa250: fifteen fixed function endpoints */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int",
135 "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int",
136 "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso",
137 "ep15in-int",
138
139 /* or like sa1100: two fixed function endpoints */
140 "ep1out-bulk", "ep2in-bulk",
Sebastian Andrzej Siewior1d166382012-11-20 13:23:15 +0100141
142 /* and now some generic EPs so we have enough in multi config */
143 "ep3out", "ep4in", "ep5out", "ep6out", "ep7in", "ep8out", "ep9in",
144 "ep10out", "ep11out", "ep12in", "ep13out", "ep14in", "ep15out",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145};
Tobias Klauser52950ed2005-12-11 16:20:08 +0100146#define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147
Alan Sternd9b76252005-05-03 16:15:43 -0400148/*-------------------------------------------------------------------------*/
149
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150#define FIFO_SIZE 64
151
152struct urbp {
153 struct urb *urb;
154 struct list_head urbp_list;
Sebastian Andrzej Siewior14fce332012-01-09 19:30:50 +0100155 struct sg_mapping_iter miter;
156 u32 miter_started;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157};
158
Alan Stern391eca92005-05-10 15:34:16 -0400159
160enum dummy_rh_state {
161 DUMMY_RH_RESET,
162 DUMMY_RH_SUSPENDED,
163 DUMMY_RH_RUNNING
164};
165
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300166struct dummy_hcd {
167 struct dummy *dum;
168 enum dummy_rh_state rh_state;
169 struct timer_list timer;
170 u32 port_status;
171 u32 old_status;
172 unsigned long re_timeout;
173
174 struct usb_device *udev;
175 struct list_head urbp_list;
Sebastian Andrzej Siewiora54c9792012-01-13 21:51:47 +0100176 u32 stream_en_ep;
177 u8 num_stream[30 / 2];
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300178
179 unsigned active:1;
180 unsigned old_active:1;
181 unsigned resuming:1;
182};
183
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184struct dummy {
185 spinlock_t lock;
186
187 /*
188 * SLAVE/GADGET side support
189 */
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100190 struct dummy_ep ep[DUMMY_ENDPOINTS];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 int address;
192 struct usb_gadget gadget;
193 struct usb_gadget_driver *driver;
194 struct dummy_request fifo_req;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100195 u8 fifo_buf[FIFO_SIZE];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 u16 devstatus;
Alan Stern391eca92005-05-10 15:34:16 -0400197 unsigned udc_suspended:1;
Alan Sternf1c39fa2005-05-03 16:24:04 -0400198 unsigned pullup:1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
200 /*
201 * MASTER/HOST side support
202 */
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300203 struct dummy_hcd *hs_hcd;
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +0300204 struct dummy_hcd *ss_hcd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205};
206
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300207static inline struct dummy_hcd *hcd_to_dummy_hcd(struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208{
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300209 return (struct dummy_hcd *) (hcd->hcd_priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210}
211
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300212static inline struct usb_hcd *dummy_hcd_to_hcd(struct dummy_hcd *dum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213{
214 return container_of((void *) dum, struct usb_hcd, hcd_priv);
215}
216
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300217static inline struct device *dummy_dev(struct dummy_hcd *dum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218{
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300219 return dummy_hcd_to_hcd(dum)->self.controller;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220}
221
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100222static inline struct device *udc_dev(struct dummy *dum)
Alan Sternd9b76252005-05-03 16:15:43 -0400223{
224 return dum->gadget.dev.parent;
225}
226
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100227static inline struct dummy *ep_to_dummy(struct dummy_ep *ep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228{
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100229 return container_of(ep->gadget, struct dummy, gadget);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230}
231
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300232static inline struct dummy_hcd *gadget_to_dummy_hcd(struct usb_gadget *gadget)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233{
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300234 struct dummy *dum = container_of(gadget, struct dummy, gadget);
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +0300235 if (dum->gadget.speed == USB_SPEED_SUPER)
236 return dum->ss_hcd;
237 else
238 return dum->hs_hcd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239}
240
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100241static inline struct dummy *gadget_dev_to_dummy(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242{
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100243 return container_of(dev, struct dummy, gadget.dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244}
245
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246/*-------------------------------------------------------------------------*/
247
Alan Sternf1c39fa2005-05-03 16:24:04 -0400248/* SLAVE/GADGET SIDE UTILITY ROUTINES */
249
250/* called with spinlock held */
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100251static void nuke(struct dummy *dum, struct dummy_ep *ep)
Alan Sternf1c39fa2005-05-03 16:24:04 -0400252{
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100253 while (!list_empty(&ep->queue)) {
Alan Sternf1c39fa2005-05-03 16:24:04 -0400254 struct dummy_request *req;
255
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100256 req = list_entry(ep->queue.next, struct dummy_request, queue);
257 list_del_init(&req->queue);
Alan Sternf1c39fa2005-05-03 16:24:04 -0400258 req->req.status = -ESHUTDOWN;
259
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100260 spin_unlock(&dum->lock);
261 req->req.complete(&ep->ep, &req->req);
262 spin_lock(&dum->lock);
Alan Sternf1c39fa2005-05-03 16:24:04 -0400263 }
264}
265
266/* caller must hold lock */
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100267static void stop_activity(struct dummy *dum)
Alan Sternf1c39fa2005-05-03 16:24:04 -0400268{
269 struct dummy_ep *ep;
270
271 /* prevent any more requests */
272 dum->address = 0;
273
274 /* The timer is left running so that outstanding URBs can fail */
275
276 /* nuke any pending requests first, so driver i/o is quiesced */
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100277 list_for_each_entry(ep, &dum->gadget.ep_list, ep.ep_list)
278 nuke(dum, ep);
Alan Sternf1c39fa2005-05-03 16:24:04 -0400279
280 /* driver now does any non-usb quiescing necessary */
281}
282
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +0300283/**
284 * set_link_state_by_speed() - Sets the current state of the link according to
285 * the hcd speed
286 * @dum_hcd: pointer to the dummy_hcd structure to update the link state for
287 *
288 * This function updates the port_status according to the link state and the
289 * speed of the hcd.
290 */
291static void set_link_state_by_speed(struct dummy_hcd *dum_hcd)
292{
293 struct dummy *dum = dum_hcd->dum;
294
295 if (dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3) {
296 if ((dum_hcd->port_status & USB_SS_PORT_STAT_POWER) == 0) {
297 dum_hcd->port_status = 0;
298 } else if (!dum->pullup || dum->udc_suspended) {
299 /* UDC suspend must cause a disconnect */
300 dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
301 USB_PORT_STAT_ENABLE);
302 if ((dum_hcd->old_status &
303 USB_PORT_STAT_CONNECTION) != 0)
304 dum_hcd->port_status |=
305 (USB_PORT_STAT_C_CONNECTION << 16);
306 } else {
307 /* device is connected and not suspended */
308 dum_hcd->port_status |= (USB_PORT_STAT_CONNECTION |
309 USB_PORT_STAT_SPEED_5GBPS) ;
310 if ((dum_hcd->old_status &
311 USB_PORT_STAT_CONNECTION) == 0)
312 dum_hcd->port_status |=
313 (USB_PORT_STAT_C_CONNECTION << 16);
314 if ((dum_hcd->port_status &
315 USB_PORT_STAT_ENABLE) == 1 &&
316 (dum_hcd->port_status &
317 USB_SS_PORT_LS_U0) == 1 &&
318 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
319 dum_hcd->active = 1;
320 }
321 } else {
322 if ((dum_hcd->port_status & USB_PORT_STAT_POWER) == 0) {
323 dum_hcd->port_status = 0;
324 } else if (!dum->pullup || dum->udc_suspended) {
325 /* UDC suspend must cause a disconnect */
326 dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
327 USB_PORT_STAT_ENABLE |
328 USB_PORT_STAT_LOW_SPEED |
329 USB_PORT_STAT_HIGH_SPEED |
330 USB_PORT_STAT_SUSPEND);
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 } else {
336 dum_hcd->port_status |= USB_PORT_STAT_CONNECTION;
337 if ((dum_hcd->old_status &
338 USB_PORT_STAT_CONNECTION) == 0)
339 dum_hcd->port_status |=
340 (USB_PORT_STAT_C_CONNECTION << 16);
341 if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0)
342 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
343 else if ((dum_hcd->port_status &
344 USB_PORT_STAT_SUSPEND) == 0 &&
345 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
346 dum_hcd->active = 1;
347 }
348 }
349}
350
Alan Sternf1c39fa2005-05-03 16:24:04 -0400351/* caller must hold lock */
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300352static void set_link_state(struct dummy_hcd *dum_hcd)
Alan Sternf1c39fa2005-05-03 16:24:04 -0400353{
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300354 struct dummy *dum = dum_hcd->dum;
355
356 dum_hcd->active = 0;
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +0300357 if (dum->pullup)
358 if ((dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3 &&
359 dum->gadget.speed != USB_SPEED_SUPER) ||
360 (dummy_hcd_to_hcd(dum_hcd)->speed != HCD_USB3 &&
361 dum->gadget.speed == USB_SPEED_SUPER))
362 return;
Alan Stern391eca92005-05-10 15:34:16 -0400363
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +0300364 set_link_state_by_speed(dum_hcd);
Alan Sternf1c39fa2005-05-03 16:24:04 -0400365
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300366 if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0 ||
367 dum_hcd->active)
368 dum_hcd->resuming = 0;
Alan Sternf1c39fa2005-05-03 16:24:04 -0400369
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +0300370 /* if !connected or reset */
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300371 if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0 ||
372 (dum_hcd->port_status & USB_PORT_STAT_RESET) != 0) {
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +0300373 /*
374 * We're connected and not reset (reset occurred now),
375 * and driver attached - disconnect!
376 */
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300377 if ((dum_hcd->old_status & USB_PORT_STAT_CONNECTION) != 0 &&
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +0300378 (dum_hcd->old_status & USB_PORT_STAT_RESET) == 0 &&
379 dum->driver) {
380 stop_activity(dum);
381 spin_unlock(&dum->lock);
382 dum->driver->disconnect(&dum->gadget);
383 spin_lock(&dum->lock);
Alan Sternf1c39fa2005-05-03 16:24:04 -0400384 }
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300385 } else if (dum_hcd->active != dum_hcd->old_active) {
386 if (dum_hcd->old_active && dum->driver->suspend) {
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +0300387 spin_unlock(&dum->lock);
388 dum->driver->suspend(&dum->gadget);
389 spin_lock(&dum->lock);
390 } else if (!dum_hcd->old_active && dum->driver->resume) {
391 spin_unlock(&dum->lock);
392 dum->driver->resume(&dum->gadget);
393 spin_lock(&dum->lock);
Alan Sternf1c39fa2005-05-03 16:24:04 -0400394 }
395 }
396
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300397 dum_hcd->old_status = dum_hcd->port_status;
398 dum_hcd->old_active = dum_hcd->active;
Alan Sternf1c39fa2005-05-03 16:24:04 -0400399}
400
401/*-------------------------------------------------------------------------*/
402
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403/* SLAVE/GADGET SIDE DRIVER
404 *
405 * This only tracks gadget state. All the work is done when the host
406 * side tries some (emulated) i/o operation. Real device controller
407 * drivers would do real i/o using dma, fifos, irqs, timers, etc.
408 */
409
410#define is_enabled(dum) \
411 (dum->port_status & USB_PORT_STAT_ENABLE)
412
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100413static int dummy_enable(struct usb_ep *_ep,
414 const struct usb_endpoint_descriptor *desc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415{
416 struct dummy *dum;
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300417 struct dummy_hcd *dum_hcd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 struct dummy_ep *ep;
419 unsigned max;
420 int retval;
421
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100422 ep = usb_ep_to_dummy_ep(_ep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 if (!_ep || !desc || ep->desc || _ep->name == ep0name
424 || desc->bDescriptorType != USB_DT_ENDPOINT)
425 return -EINVAL;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100426 dum = ep_to_dummy(ep);
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300427 if (!dum->driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 return -ESHUTDOWN;
Sebastian Andrzej Siewior719e52c2011-06-16 20:36:57 +0200429
430 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300431 if (!is_enabled(dum_hcd))
432 return -ESHUTDOWN;
433
434 /*
435 * For HS/FS devices only bits 0..10 of the wMaxPacketSize represent the
436 * maximum packet size.
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +0300437 * For SS devices the wMaxPacketSize is limited by 1024.
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300438 */
Kuninori Morimoto29cc8892011-08-23 03:12:03 -0700439 max = usb_endpoint_maxp(desc) & 0x7ff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440
441 /* drivers must not request bad settings, since lower levels
442 * (hardware or its drivers) may not check. some endpoints
443 * can't do iso, many have maxpacket limitations, etc.
444 *
445 * since this "hardware" driver is here to help debugging, we
446 * have some extra sanity checks. (there could be more though,
447 * especially for "ep9out" style fixed function ones.)
448 */
449 retval = -EINVAL;
Sebastian Andrzej Siewior59f08e62012-01-12 12:53:14 +0100450 switch (usb_endpoint_type(desc)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 case USB_ENDPOINT_XFER_BULK:
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100452 if (strstr(ep->ep.name, "-iso")
453 || strstr(ep->ep.name, "-int")) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 goto done;
455 }
456 switch (dum->gadget.speed) {
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +0300457 case USB_SPEED_SUPER:
458 if (max == 1024)
459 break;
460 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 case USB_SPEED_HIGH:
462 if (max == 512)
463 break;
Ingo van Lil9063ff42008-03-28 14:50:26 -0700464 goto done;
465 case USB_SPEED_FULL:
466 if (max == 8 || max == 16 || max == 32 || max == 64)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 /* we'll fake any legal size */
468 break;
Ingo van Lil9063ff42008-03-28 14:50:26 -0700469 /* save a return statement */
470 default:
471 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 }
473 break;
474 case USB_ENDPOINT_XFER_INT:
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100475 if (strstr(ep->ep.name, "-iso")) /* bulk is ok */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 goto done;
477 /* real hardware might not handle all packet sizes */
478 switch (dum->gadget.speed) {
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +0300479 case USB_SPEED_SUPER:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 case USB_SPEED_HIGH:
481 if (max <= 1024)
482 break;
483 /* save a return statement */
484 case USB_SPEED_FULL:
485 if (max <= 64)
486 break;
487 /* save a return statement */
488 default:
489 if (max <= 8)
490 break;
491 goto done;
492 }
493 break;
494 case USB_ENDPOINT_XFER_ISOC:
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100495 if (strstr(ep->ep.name, "-bulk")
496 || strstr(ep->ep.name, "-int"))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 goto done;
498 /* real hardware might not handle all packet sizes */
499 switch (dum->gadget.speed) {
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +0300500 case USB_SPEED_SUPER:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 case USB_SPEED_HIGH:
502 if (max <= 1024)
503 break;
504 /* save a return statement */
505 case USB_SPEED_FULL:
506 if (max <= 1023)
507 break;
508 /* save a return statement */
509 default:
510 goto done;
511 }
512 break;
513 default:
514 /* few chips support control except on ep0 */
515 goto done;
516 }
517
518 _ep->maxpacket = max;
Sebastian Andrzej Siewiora54c9792012-01-13 21:51:47 +0100519 if (usb_ss_max_streams(_ep->comp_desc)) {
520 if (!usb_endpoint_xfer_bulk(desc)) {
521 dev_err(udc_dev(dum), "Can't enable stream support on "
522 "non-bulk ep %s\n", _ep->name);
523 return -EINVAL;
524 }
525 ep->stream_en = 1;
526 }
Sebastian Andrzej Siewior3cf0ad02012-01-25 11:51:19 +0100527 ep->desc = desc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528
Sebastian Andrzej Siewiora54c9792012-01-13 21:51:47 +0100529 dev_dbg(udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d stream %s\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 _ep->name,
531 desc->bEndpointAddress & 0x0f,
532 (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
533 ({ char *val;
Sebastian Andrzej Siewior59f08e62012-01-12 12:53:14 +0100534 switch (usb_endpoint_type(desc)) {
Tatyana Brokhman7c884fe2011-06-28 16:33:52 +0300535 case USB_ENDPOINT_XFER_BULK:
536 val = "bulk";
537 break;
538 case USB_ENDPOINT_XFER_ISOC:
539 val = "iso";
540 break;
541 case USB_ENDPOINT_XFER_INT:
542 val = "intr";
543 break;
544 default:
545 val = "ctrl";
546 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 }; val; }),
Sebastian Andrzej Siewiora54c9792012-01-13 21:51:47 +0100548 max, ep->stream_en ? "enabled" : "disabled");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549
550 /* at this point real hardware should be NAKing transfers
551 * to that endpoint, until a buffer is queued to it.
552 */
Alan Stern851a5262008-08-14 15:48:30 -0400553 ep->halted = ep->wedged = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 retval = 0;
555done:
556 return retval;
557}
558
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100559static int dummy_disable(struct usb_ep *_ep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560{
561 struct dummy_ep *ep;
562 struct dummy *dum;
563 unsigned long flags;
564 int retval;
565
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100566 ep = usb_ep_to_dummy_ep(_ep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 if (!_ep || !ep->desc || _ep->name == ep0name)
568 return -EINVAL;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100569 dum = ep_to_dummy(ep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100571 spin_lock_irqsave(&dum->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 ep->desc = NULL;
Sebastian Andrzej Siewiora54c9792012-01-13 21:51:47 +0100573 ep->stream_en = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 retval = 0;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100575 nuke(dum, ep);
576 spin_unlock_irqrestore(&dum->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100578 dev_dbg(udc_dev(dum), "disabled %s\n", _ep->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 return retval;
580}
581
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100582static struct usb_request *dummy_alloc_request(struct usb_ep *_ep,
583 gfp_t mem_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584{
585 struct dummy_ep *ep;
586 struct dummy_request *req;
587
588 if (!_ep)
589 return NULL;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100590 ep = usb_ep_to_dummy_ep(_ep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591
Eric Sesterhenn7039f422006-02-27 13:34:10 -0800592 req = kzalloc(sizeof(*req), mem_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 if (!req)
594 return NULL;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100595 INIT_LIST_HEAD(&req->queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 return &req->req;
597}
598
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100599static void dummy_free_request(struct usb_ep *_ep, struct usb_request *_req)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 struct dummy_request *req;
602
Sebastian Andrzej Siewiorf99987b2012-02-09 09:24:59 +0100603 if (!_ep || !_req) {
Sasha Levin72688dc2012-05-11 06:39:37 +0200604 WARN_ON(1);
Sebastian Andrzej Siewior20edfbb2012-01-25 15:18:58 +0100605 return;
Sebastian Andrzej Siewiorf99987b2012-02-09 09:24:59 +0100606 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100608 req = usb_request_to_dummy_request(_req);
609 WARN_ON(!list_empty(&req->queue));
610 kfree(req);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611}
612
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100613static void fifo_complete(struct usb_ep *ep, struct usb_request *req)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614{
615}
616
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100617static int dummy_queue(struct usb_ep *_ep, struct usb_request *_req,
Al Viro55016f12005-10-21 03:21:58 -0400618 gfp_t mem_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619{
620 struct dummy_ep *ep;
621 struct dummy_request *req;
622 struct dummy *dum;
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300623 struct dummy_hcd *dum_hcd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 unsigned long flags;
625
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100626 req = usb_request_to_dummy_request(_req);
627 if (!_req || !list_empty(&req->queue) || !_req->complete)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 return -EINVAL;
629
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100630 ep = usb_ep_to_dummy_ep(_ep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 if (!_ep || (!ep->desc && _ep->name != ep0name))
632 return -EINVAL;
633
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100634 dum = ep_to_dummy(ep);
Sebastian Andrzej Siewior719e52c2011-06-16 20:36:57 +0200635 dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300636 if (!dum->driver || !is_enabled(dum_hcd))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 return -ESHUTDOWN;
638
639#if 0
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100640 dev_dbg(udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 ep, _req, _ep->name, _req->length, _req->buf);
642#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 _req->status = -EINPROGRESS;
644 _req->actual = 0;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100645 spin_lock_irqsave(&dum->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646
647 /* implement an emulated single-request FIFO */
648 if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100649 list_empty(&dum->fifo_req.queue) &&
650 list_empty(&ep->queue) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 _req->length <= FIFO_SIZE) {
652 req = &dum->fifo_req;
653 req->req = *_req;
654 req->req.buf = dum->fifo_buf;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100655 memcpy(dum->fifo_buf, _req->buf, _req->length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 req->req.context = dum;
657 req->req.complete = fifo_complete;
658
David Brownellc728df72008-07-26 08:06:24 -0700659 list_add_tail(&req->queue, &ep->queue);
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100660 spin_unlock(&dum->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 _req->actual = _req->length;
662 _req->status = 0;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100663 _req->complete(_ep, _req);
664 spin_lock(&dum->lock);
David Brownellc728df72008-07-26 08:06:24 -0700665 } else
666 list_add_tail(&req->queue, &ep->queue);
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100667 spin_unlock_irqrestore(&dum->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668
669 /* real hardware would likely enable transfers here, in case
670 * it'd been left NAKing.
671 */
672 return 0;
673}
674
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100675static int dummy_dequeue(struct usb_ep *_ep, struct usb_request *_req)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676{
677 struct dummy_ep *ep;
678 struct dummy *dum;
679 int retval = -EINVAL;
680 unsigned long flags;
681 struct dummy_request *req = NULL;
682
683 if (!_ep || !_req)
684 return retval;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100685 ep = usb_ep_to_dummy_ep(_ep);
686 dum = ep_to_dummy(ep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687
688 if (!dum->driver)
689 return -ESHUTDOWN;
690
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100691 local_irq_save(flags);
692 spin_lock(&dum->lock);
693 list_for_each_entry(req, &ep->queue, queue) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 if (&req->req == _req) {
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100695 list_del_init(&req->queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 _req->status = -ECONNRESET;
697 retval = 0;
698 break;
699 }
700 }
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100701 spin_unlock(&dum->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702
703 if (retval == 0) {
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100704 dev_dbg(udc_dev(dum),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 "dequeued req %p from %s, len %d buf %p\n",
706 req, _ep->name, _req->length, _req->buf);
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100707 _req->complete(_ep, _req);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 }
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100709 local_irq_restore(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 return retval;
711}
712
713static int
Alan Stern851a5262008-08-14 15:48:30 -0400714dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715{
716 struct dummy_ep *ep;
717 struct dummy *dum;
718
719 if (!_ep)
720 return -EINVAL;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100721 ep = usb_ep_to_dummy_ep(_ep);
722 dum = ep_to_dummy(ep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 if (!dum->driver)
724 return -ESHUTDOWN;
725 if (!value)
Alan Stern851a5262008-08-14 15:48:30 -0400726 ep->halted = ep->wedged = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100728 !list_empty(&ep->queue))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 return -EAGAIN;
Alan Stern851a5262008-08-14 15:48:30 -0400730 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 ep->halted = 1;
Alan Stern851a5262008-08-14 15:48:30 -0400732 if (wedged)
733 ep->wedged = 1;
734 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 /* FIXME clear emulated data toggle too */
736 return 0;
737}
738
Alan Stern851a5262008-08-14 15:48:30 -0400739static int
740dummy_set_halt(struct usb_ep *_ep, int value)
741{
742 return dummy_set_halt_and_wedge(_ep, value, 0);
743}
744
745static int dummy_set_wedge(struct usb_ep *_ep)
746{
747 if (!_ep || _ep->name == ep0name)
748 return -EINVAL;
749 return dummy_set_halt_and_wedge(_ep, 1, 1);
750}
751
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752static const struct usb_ep_ops dummy_ep_ops = {
753 .enable = dummy_enable,
754 .disable = dummy_disable,
755
756 .alloc_request = dummy_alloc_request,
757 .free_request = dummy_free_request,
758
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 .queue = dummy_queue,
760 .dequeue = dummy_dequeue,
761
762 .set_halt = dummy_set_halt,
Alan Stern851a5262008-08-14 15:48:30 -0400763 .set_wedge = dummy_set_wedge,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764};
765
766/*-------------------------------------------------------------------------*/
767
768/* there are both host and device side versions of this call ... */
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100769static int dummy_g_get_frame(struct usb_gadget *_gadget)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770{
771 struct timeval tv;
772
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100773 do_gettimeofday(&tv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 return tv.tv_usec / 1000;
775}
776
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100777static int dummy_wakeup(struct usb_gadget *_gadget)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778{
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300779 struct dummy_hcd *dum_hcd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300781 dum_hcd = gadget_to_dummy_hcd(_gadget);
782 if (!(dum_hcd->dum->devstatus & ((1 << USB_DEVICE_B_HNP_ENABLE)
Alan Stern5742b0c2005-05-02 11:25:17 -0400783 | (1 << USB_DEVICE_REMOTE_WAKEUP))))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 return -EINVAL;
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300785 if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0)
Alan Stern391eca92005-05-10 15:34:16 -0400786 return -ENOLINK;
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300787 if ((dum_hcd->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
788 dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
Alan Stern391eca92005-05-10 15:34:16 -0400789 return -EIO;
790
791 /* FIXME: What if the root hub is suspended but the port isn't? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792
793 /* hub notices our request, issues downstream resume, etc */
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300794 dum_hcd->resuming = 1;
795 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(20);
796 mod_timer(&dummy_hcd_to_hcd(dum_hcd)->rh_timer, dum_hcd->re_timeout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 return 0;
798}
799
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100800static int dummy_set_selfpowered(struct usb_gadget *_gadget, int value)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801{
802 struct dummy *dum;
803
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100804 dum = gadget_to_dummy_hcd(_gadget)->dum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 if (value)
806 dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
807 else
808 dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
809 return 0;
810}
811
Sebastian Andrzej Siewiord2621272012-01-09 13:14:59 +0100812static void dummy_udc_update_ep0(struct dummy *dum)
Sebastian Andrzej Siewiorb5738412011-06-23 14:26:14 +0200813{
Sebastian Andrzej Siewiorc6884192012-01-09 13:14:56 +0100814 if (dum->gadget.speed == USB_SPEED_SUPER)
Sebastian Andrzej Siewiorb5738412011-06-23 14:26:14 +0200815 dum->ep[0].ep.maxpacket = 9;
Sebastian Andrzej Siewiorc6884192012-01-09 13:14:56 +0100816 else
Sebastian Andrzej Siewiorb5738412011-06-23 14:26:14 +0200817 dum->ep[0].ep.maxpacket = 64;
Sebastian Andrzej Siewiorb5738412011-06-23 14:26:14 +0200818}
819
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100820static int dummy_pullup(struct usb_gadget *_gadget, int value)
Alan Sternf1c39fa2005-05-03 16:24:04 -0400821{
Sebastian Andrzej Siewiord8a14a82011-06-17 10:11:41 +0200822 struct dummy_hcd *dum_hcd;
Alan Sternf1c39fa2005-05-03 16:24:04 -0400823 struct dummy *dum;
824 unsigned long flags;
825
Sebastian Andrzej Siewiorb5738412011-06-23 14:26:14 +0200826 dum = gadget_dev_to_dummy(&_gadget->dev);
827
828 if (value && dum->driver) {
829 if (mod_data.is_super_speed)
Michal Nazarewicz7177aed2011-11-19 18:27:38 +0100830 dum->gadget.speed = dum->driver->max_speed;
Sebastian Andrzej Siewiorb5738412011-06-23 14:26:14 +0200831 else if (mod_data.is_high_speed)
832 dum->gadget.speed = min_t(u8, USB_SPEED_HIGH,
Michal Nazarewicz7177aed2011-11-19 18:27:38 +0100833 dum->driver->max_speed);
Sebastian Andrzej Siewiorb5738412011-06-23 14:26:14 +0200834 else
835 dum->gadget.speed = USB_SPEED_FULL;
Sebastian Andrzej Siewiord2621272012-01-09 13:14:59 +0100836 dummy_udc_update_ep0(dum);
Sebastian Andrzej Siewiorb5738412011-06-23 14:26:14 +0200837
Michal Nazarewicz7177aed2011-11-19 18:27:38 +0100838 if (dum->gadget.speed < dum->driver->max_speed)
Sebastian Andrzej Siewiorb5738412011-06-23 14:26:14 +0200839 dev_dbg(udc_dev(dum), "This device can perform faster"
Michal Nazarewicz7177aed2011-11-19 18:27:38 +0100840 " if you connect it to a %s port...\n",
841 usb_speed_string(dum->driver->max_speed));
Sebastian Andrzej Siewiorb5738412011-06-23 14:26:14 +0200842 }
Sebastian Andrzej Siewiord8a14a82011-06-17 10:11:41 +0200843 dum_hcd = gadget_to_dummy_hcd(_gadget);
Sebastian Andrzej Siewiord8a14a82011-06-17 10:11:41 +0200844
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100845 spin_lock_irqsave(&dum->lock, flags);
Alan Sternf1c39fa2005-05-03 16:24:04 -0400846 dum->pullup = (value != 0);
Sebastian Andrzej Siewiord8a14a82011-06-17 10:11:41 +0200847 set_link_state(dum_hcd);
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100848 spin_unlock_irqrestore(&dum->lock, flags);
Sebastian Andrzej Siewiorb5738412011-06-23 14:26:14 +0200849
Sebastian Andrzej Siewiord8a14a82011-06-17 10:11:41 +0200850 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
Alan Sternf1c39fa2005-05-03 16:24:04 -0400851 return 0;
852}
853
Sebastian Andrzej Siewioraa074732011-06-23 14:26:17 +0200854static int dummy_udc_start(struct usb_gadget *g,
855 struct usb_gadget_driver *driver);
856static int dummy_udc_stop(struct usb_gadget *g,
857 struct usb_gadget_driver *driver);
Sebastian Andrzej Siewior0f913492011-06-28 16:33:47 +0300858
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859static const struct usb_gadget_ops dummy_ops = {
860 .get_frame = dummy_g_get_frame,
861 .wakeup = dummy_wakeup,
862 .set_selfpowered = dummy_set_selfpowered,
Alan Sternf1c39fa2005-05-03 16:24:04 -0400863 .pullup = dummy_pullup,
Sebastian Andrzej Siewioraa074732011-06-23 14:26:17 +0200864 .udc_start = dummy_udc_start,
865 .udc_stop = dummy_udc_stop,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866};
867
868/*-------------------------------------------------------------------------*/
869
870/* "function" sysfs attribute */
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100871static ssize_t show_function(struct device *dev, struct device_attribute *attr,
872 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873{
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100874 struct dummy *dum = gadget_dev_to_dummy(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875
876 if (!dum->driver || !dum->driver->function)
877 return 0;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100878 return scnprintf(buf, PAGE_SIZE, "%s\n", dum->driver->function);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879}
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100880static DEVICE_ATTR(function, S_IRUGO, show_function, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881
882/*-------------------------------------------------------------------------*/
883
884/*
885 * Driver registration/unregistration.
886 *
887 * This is basically hardware-specific; there's usually only one real USB
888 * device (not host) controller since that's how USB devices are intended
889 * to work. So most implementations of these api calls will rely on the
890 * fact that only one driver will ever bind to the hardware. But curious
891 * hardware can be built with discrete components, so the gadget API doesn't
892 * require that assumption.
893 *
894 * For this emulator, it might be convenient to create a usb slave device
895 * for each driver that registers: just add to a big root hub.
896 */
897
Sebastian Andrzej Siewioraa074732011-06-23 14:26:17 +0200898static int dummy_udc_start(struct usb_gadget *g,
899 struct usb_gadget_driver *driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900{
Sebastian Andrzej Siewioraa074732011-06-23 14:26:17 +0200901 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
902 struct dummy *dum = dum_hcd->dum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903
Michal Nazarewicz7177aed2011-11-19 18:27:38 +0100904 if (driver->max_speed == USB_SPEED_UNKNOWN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 return -EINVAL;
906
907 /*
908 * SLAVE side init ... the layer above hardware, which
909 * can't enumerate without help from the driver we're binding.
910 */
Alan Stern5742b0c2005-05-02 11:25:17 -0400911
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912 dum->devstatus = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 dum->driver = driver;
Alan Sternd0d86072012-08-20 16:12:47 -0400915 dum->gadget.dev.driver = &driver->driver;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100916 dev_dbg(udc_dev(dum), "binding gadget driver '%s'\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 driver->driver.name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918 return 0;
919}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920
Sebastian Andrzej Siewioraa074732011-06-23 14:26:17 +0200921static int dummy_udc_stop(struct usb_gadget *g,
922 struct usb_gadget_driver *driver)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923{
Sebastian Andrzej Siewioraa074732011-06-23 14:26:17 +0200924 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
925 struct dummy *dum = dum_hcd->dum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100927 dev_dbg(udc_dev(dum), "unregister gadget driver '%s'\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 driver->driver.name);
929
Alan Sternd0d86072012-08-20 16:12:47 -0400930 dum->gadget.dev.driver = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 dum->driver = NULL;
Sebastian Andrzej Siewior25427872011-06-16 20:36:55 +0200932
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933 return 0;
934}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935
936#undef is_enabled
937
Alan Sternd9b76252005-05-03 16:15:43 -0400938/* The gadget structure is stored inside the hcd structure and will be
939 * released along with it. */
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100940static void dummy_gadget_release(struct device *dev)
Alan Sternd9b76252005-05-03 16:15:43 -0400941{
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +0300942 return;
Alan Sternd9b76252005-05-03 16:15:43 -0400943}
944
Sebastian Andrzej Siewior0fb57592011-06-23 14:26:12 +0200945static void init_dummy_udc_hw(struct dummy *dum)
946{
947 int i;
948
949 INIT_LIST_HEAD(&dum->gadget.ep_list);
950 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
951 struct dummy_ep *ep = &dum->ep[i];
952
953 if (!ep_name[i])
954 break;
955 ep->ep.name = ep_name[i];
956 ep->ep.ops = &dummy_ep_ops;
957 list_add_tail(&ep->ep.ep_list, &dum->gadget.ep_list);
958 ep->halted = ep->wedged = ep->already_seen =
959 ep->setup_stage = 0;
960 ep->ep.maxpacket = ~0;
Sebastian Andrzej Siewiorc6884192012-01-09 13:14:56 +0100961 ep->ep.max_streams = 16;
Sebastian Andrzej Siewior0fb57592011-06-23 14:26:12 +0200962 ep->last_io = jiffies;
963 ep->gadget = &dum->gadget;
964 ep->desc = NULL;
965 INIT_LIST_HEAD(&ep->queue);
966 }
967
968 dum->gadget.ep0 = &dum->ep[0].ep;
969 list_del_init(&dum->ep[0].ep.ep_list);
970 INIT_LIST_HEAD(&dum->fifo_req.queue);
Sebastian Andrzej Siewiorf8744d42011-06-23 14:26:13 +0200971
972#ifdef CONFIG_USB_OTG
973 dum->gadget.is_otg = 1;
974#endif
Sebastian Andrzej Siewior0fb57592011-06-23 14:26:12 +0200975}
976
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100977static int dummy_udc_probe(struct platform_device *pdev)
Alan Sternd9b76252005-05-03 16:15:43 -0400978{
Sebastian Andrzej Siewiorb100a2f2012-10-29 18:09:56 +0100979 struct dummy *dum;
Alan Sternd9b76252005-05-03 16:15:43 -0400980 int rc;
981
Sebastian Andrzej Siewiorb100a2f2012-10-29 18:09:56 +0100982 dum = *((void **)dev_get_platdata(&pdev->dev));
Alan Sternd9b76252005-05-03 16:15:43 -0400983 dum->gadget.name = gadget_name;
984 dum->gadget.ops = &dummy_ops;
Michal Nazarewiczd327ab52011-11-19 18:27:37 +0100985 dum->gadget.max_speed = USB_SPEED_SUPER;
Alan Sternd9b76252005-05-03 16:15:43 -0400986
Alan Stern8364d6b2005-11-14 12:16:30 -0500987 dum->gadget.dev.parent = &pdev->dev;
Alan Sternd9b76252005-05-03 16:15:43 -0400988 dum->gadget.dev.release = dummy_gadget_release;
Sebastian Andrzej Siewior0fb57592011-06-23 14:26:12 +0200989 init_dummy_udc_hw(dum);
990
Sebastian Andrzej Siewior0f913492011-06-28 16:33:47 +0300991 rc = usb_add_gadget_udc(&pdev->dev, &dum->gadget);
992 if (rc < 0)
993 goto err_udc;
994
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +0100995 rc = device_create_file(&dum->gadget.dev, &dev_attr_function);
Alan Sternefd54a32006-09-25 11:55:56 -0400996 if (rc < 0)
Sebastian Andrzej Siewior0f913492011-06-28 16:33:47 +0300997 goto err_dev;
998 platform_set_drvdata(pdev, dum);
999 return rc;
1000
1001err_dev:
1002 usb_del_gadget_udc(&dum->gadget);
1003err_udc:
Alan Sternd9b76252005-05-03 16:15:43 -04001004 return rc;
1005}
1006
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001007static int dummy_udc_remove(struct platform_device *pdev)
Alan Sternd9b76252005-05-03 16:15:43 -04001008{
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001009 struct dummy *dum = platform_get_drvdata(pdev);
Alan Sternd9b76252005-05-03 16:15:43 -04001010
Sebastian Andrzej Siewior0f913492011-06-28 16:33:47 +03001011 usb_del_gadget_udc(&dum->gadget);
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001012 platform_set_drvdata(pdev, NULL);
1013 device_remove_file(&dum->gadget.dev, &dev_attr_function);
Alan Sternd9b76252005-05-03 16:15:43 -04001014 return 0;
1015}
1016
Sebastian Andrzej Siewiorfc0b7212011-06-17 19:43:13 +02001017static void dummy_udc_pm(struct dummy *dum, struct dummy_hcd *dum_hcd,
1018 int suspend)
Alan Stern391eca92005-05-10 15:34:16 -04001019{
Sebastian Andrzej Siewiorfc0b7212011-06-17 19:43:13 +02001020 spin_lock_irq(&dum->lock);
1021 dum->udc_suspended = suspend;
Sebastian Andrzej Siewiord8a14a82011-06-17 10:11:41 +02001022 set_link_state(dum_hcd);
Sebastian Andrzej Siewiorfc0b7212011-06-17 19:43:13 +02001023 spin_unlock_irq(&dum->lock);
1024}
Alan Stern391eca92005-05-10 15:34:16 -04001025
Sebastian Andrzej Siewiorfc0b7212011-06-17 19:43:13 +02001026static int dummy_udc_suspend(struct platform_device *pdev, pm_message_t state)
1027{
1028 struct dummy *dum = platform_get_drvdata(pdev);
1029 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
1030
1031 dev_dbg(&pdev->dev, "%s\n", __func__);
1032 dummy_udc_pm(dum, dum_hcd, 1);
Sebastian Andrzej Siewiord8a14a82011-06-17 10:11:41 +02001033 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
Alan Stern391eca92005-05-10 15:34:16 -04001034 return 0;
1035}
1036
Sebastian Andrzej Siewiorfc0b7212011-06-17 19:43:13 +02001037static int dummy_udc_resume(struct platform_device *pdev)
Alan Stern391eca92005-05-10 15:34:16 -04001038{
Sebastian Andrzej Siewiorfc0b7212011-06-17 19:43:13 +02001039 struct dummy *dum = platform_get_drvdata(pdev);
1040 struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
Alan Stern391eca92005-05-10 15:34:16 -04001041
Sebastian Andrzej Siewiorfc0b7212011-06-17 19:43:13 +02001042 dev_dbg(&pdev->dev, "%s\n", __func__);
1043 dummy_udc_pm(dum, dum_hcd, 0);
Sebastian Andrzej Siewiord8a14a82011-06-17 10:11:41 +02001044 usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
Alan Stern391eca92005-05-10 15:34:16 -04001045 return 0;
1046}
1047
Russell King3ae5eae2005-11-09 22:32:44 +00001048static struct platform_driver dummy_udc_driver = {
Alan Sternd9b76252005-05-03 16:15:43 -04001049 .probe = dummy_udc_probe,
1050 .remove = dummy_udc_remove,
Alan Stern391eca92005-05-10 15:34:16 -04001051 .suspend = dummy_udc_suspend,
1052 .resume = dummy_udc_resume,
Russell King3ae5eae2005-11-09 22:32:44 +00001053 .driver = {
1054 .name = (char *) gadget_name,
1055 .owner = THIS_MODULE,
1056 },
Alan Sternd9b76252005-05-03 16:15:43 -04001057};
1058
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059/*-------------------------------------------------------------------------*/
1060
Sebastian Andrzej Siewiora54c9792012-01-13 21:51:47 +01001061static unsigned int dummy_get_ep_idx(const struct usb_endpoint_descriptor *desc)
1062{
1063 unsigned int index;
1064
1065 index = usb_endpoint_num(desc) << 1;
1066 if (usb_endpoint_dir_in(desc))
1067 index |= 1;
1068 return index;
1069}
1070
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071/* MASTER/HOST SIDE DRIVER
1072 *
1073 * this uses the hcd framework to hook up to host side drivers.
1074 * its root hub will only have one device, otherwise it acts like
1075 * a normal host controller.
1076 *
1077 * when urbs are queued, they're just stuck on a list that we
1078 * scan in a timer callback. that callback connects writes from
1079 * the host with reads from the device, and so on, based on the
1080 * usb 2.0 rules.
1081 */
1082
Sebastian Andrzej Siewiora54c9792012-01-13 21:51:47 +01001083static int dummy_ep_stream_en(struct dummy_hcd *dum_hcd, struct urb *urb)
1084{
1085 const struct usb_endpoint_descriptor *desc = &urb->ep->desc;
1086 u32 index;
1087
1088 if (!usb_endpoint_xfer_bulk(desc))
1089 return 0;
1090
1091 index = dummy_get_ep_idx(desc);
1092 return (1 << index) & dum_hcd->stream_en_ep;
1093}
1094
1095/*
1096 * The max stream number is saved as a nibble so for the 30 possible endpoints
1097 * we only 15 bytes of memory. Therefore we are limited to max 16 streams (0
1098 * means we use only 1 stream). The maximum according to the spec is 16bit so
1099 * if the 16 stream limit is about to go, the array size should be incremented
1100 * to 30 elements of type u16.
1101 */
1102static int get_max_streams_for_pipe(struct dummy_hcd *dum_hcd,
1103 unsigned int pipe)
1104{
1105 int max_streams;
1106
1107 max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)];
1108 if (usb_pipeout(pipe))
1109 max_streams >>= 4;
1110 else
1111 max_streams &= 0xf;
1112 max_streams++;
1113 return max_streams;
1114}
1115
1116static void set_max_streams_for_pipe(struct dummy_hcd *dum_hcd,
1117 unsigned int pipe, unsigned int streams)
1118{
1119 int max_streams;
1120
1121 streams--;
1122 max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)];
1123 if (usb_pipeout(pipe)) {
1124 streams <<= 4;
1125 max_streams &= 0xf;
1126 } else {
1127 max_streams &= 0xf0;
1128 }
1129 max_streams |= streams;
1130 dum_hcd->num_stream[usb_pipeendpoint(pipe)] = max_streams;
1131}
1132
1133static int dummy_validate_stream(struct dummy_hcd *dum_hcd, struct urb *urb)
1134{
1135 unsigned int max_streams;
1136 int enabled;
1137
1138 enabled = dummy_ep_stream_en(dum_hcd, urb);
1139 if (!urb->stream_id) {
1140 if (enabled)
1141 return -EINVAL;
1142 return 0;
1143 }
1144 if (!enabled)
1145 return -EINVAL;
1146
1147 max_streams = get_max_streams_for_pipe(dum_hcd,
1148 usb_pipeendpoint(urb->pipe));
1149 if (urb->stream_id > max_streams) {
1150 dev_err(dummy_dev(dum_hcd), "Stream id %d is out of range.\n",
1151 urb->stream_id);
1152 BUG();
1153 return -EINVAL;
1154 }
1155 return 0;
1156}
1157
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001158static int dummy_urb_enqueue(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159 struct usb_hcd *hcd,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 struct urb *urb,
Al Viro55016f12005-10-21 03:21:58 -04001161 gfp_t mem_flags
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162) {
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001163 struct dummy_hcd *dum_hcd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164 struct urbp *urbp;
1165 unsigned long flags;
Alan Sterne9df41c2007-08-08 11:48:02 -04001166 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001168 urbp = kmalloc(sizeof *urbp, mem_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169 if (!urbp)
1170 return -ENOMEM;
1171 urbp->urb = urb;
Sebastian Andrzej Siewior14fce332012-01-09 19:30:50 +01001172 urbp->miter_started = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001174 dum_hcd = hcd_to_dummy_hcd(hcd);
1175 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
Sebastian Andrzej Siewiora54c9792012-01-13 21:51:47 +01001176
1177 rc = dummy_validate_stream(dum_hcd, urb);
1178 if (rc) {
1179 kfree(urbp);
1180 goto done;
1181 }
1182
Alan Sterne9df41c2007-08-08 11:48:02 -04001183 rc = usb_hcd_link_urb_to_ep(hcd, urb);
1184 if (rc) {
1185 kfree(urbp);
1186 goto done;
1187 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001189 if (!dum_hcd->udev) {
1190 dum_hcd->udev = urb->dev;
1191 usb_get_dev(dum_hcd->udev);
1192 } else if (unlikely(dum_hcd->udev != urb->dev))
1193 dev_err(dummy_dev(dum_hcd), "usb_device address has changed!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001195 list_add_tail(&urbp->urbp_list, &dum_hcd->urbp_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 urb->hcpriv = urbp;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001197 if (usb_pipetype(urb->pipe) == PIPE_CONTROL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198 urb->error_count = 1; /* mark as a new urb */
1199
1200 /* kick the scheduler, it'll do the rest */
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001201 if (!timer_pending(&dum_hcd->timer))
1202 mod_timer(&dum_hcd->timer, jiffies + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203
Alan Sterne9df41c2007-08-08 11:48:02 -04001204 done:
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001205 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
Alan Sterne9df41c2007-08-08 11:48:02 -04001206 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207}
1208
Alan Sterne9df41c2007-08-08 11:48:02 -04001209static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210{
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001211 struct dummy_hcd *dum_hcd;
Alan Stern391eca92005-05-10 15:34:16 -04001212 unsigned long flags;
Alan Sterne9df41c2007-08-08 11:48:02 -04001213 int rc;
Alan Stern391eca92005-05-10 15:34:16 -04001214
1215 /* giveback happens automatically in timer callback,
1216 * so make sure the callback happens */
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001217 dum_hcd = hcd_to_dummy_hcd(hcd);
1218 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
Alan Sterne9df41c2007-08-08 11:48:02 -04001219
1220 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001221 if (!rc && dum_hcd->rh_state != DUMMY_RH_RUNNING &&
1222 !list_empty(&dum_hcd->urbp_list))
1223 mod_timer(&dum_hcd->timer, jiffies);
Alan Sterne9df41c2007-08-08 11:48:02 -04001224
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001225 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
Alan Sterne9df41c2007-08-08 11:48:02 -04001226 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227}
1228
Sebastian Andrzej Siewiora04ce202012-01-09 13:14:57 +01001229static int dummy_perform_transfer(struct urb *urb, struct dummy_request *req,
1230 u32 len)
1231{
1232 void *ubuf, *rbuf;
Sebastian Andrzej Siewior14fce332012-01-09 19:30:50 +01001233 struct urbp *urbp = urb->hcpriv;
Sebastian Andrzej Siewiora04ce202012-01-09 13:14:57 +01001234 int to_host;
Sebastian Andrzej Siewior14fce332012-01-09 19:30:50 +01001235 struct sg_mapping_iter *miter = &urbp->miter;
1236 u32 trans = 0;
1237 u32 this_sg;
1238 bool next_sg;
Sebastian Andrzej Siewiora04ce202012-01-09 13:14:57 +01001239
1240 to_host = usb_pipein(urb->pipe);
1241 rbuf = req->req.buf + req->req.actual;
Sebastian Andrzej Siewiora04ce202012-01-09 13:14:57 +01001242
Sebastian Andrzej Siewior14fce332012-01-09 19:30:50 +01001243 if (!urb->num_sgs) {
1244 ubuf = urb->transfer_buffer + urb->actual_length;
1245 if (to_host)
1246 memcpy(ubuf, rbuf, len);
1247 else
1248 memcpy(rbuf, ubuf, len);
1249 return len;
1250 }
1251
1252 if (!urbp->miter_started) {
1253 u32 flags = SG_MITER_ATOMIC;
1254
1255 if (to_host)
1256 flags |= SG_MITER_TO_SG;
1257 else
1258 flags |= SG_MITER_FROM_SG;
1259
1260 sg_miter_start(miter, urb->sg, urb->num_sgs, flags);
1261 urbp->miter_started = 1;
1262 }
1263 next_sg = sg_miter_next(miter);
1264 if (next_sg == false) {
1265 WARN_ON_ONCE(1);
1266 return -EINVAL;
1267 }
1268 do {
1269 ubuf = miter->addr;
1270 this_sg = min_t(u32, len, miter->length);
1271 miter->consumed = this_sg;
1272 trans += this_sg;
1273
1274 if (to_host)
1275 memcpy(ubuf, rbuf, this_sg);
1276 else
1277 memcpy(rbuf, ubuf, this_sg);
1278 len -= this_sg;
1279
1280 if (!len)
1281 break;
1282 next_sg = sg_miter_next(miter);
1283 if (next_sg == false) {
1284 WARN_ON_ONCE(1);
1285 return -EINVAL;
1286 }
1287
1288 rbuf += this_sg;
1289 } while (1);
1290
1291 sg_miter_stop(miter);
1292 return trans;
Sebastian Andrzej Siewiora04ce202012-01-09 13:14:57 +01001293}
1294
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295/* transfer up to a frame's worth; caller must own lock */
Sebastian Andrzej Siewiora54c9792012-01-13 21:51:47 +01001296static int transfer(struct dummy_hcd *dum_hcd, struct urb *urb,
1297 struct dummy_ep *ep, int limit, int *status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298{
Sebastian Andrzej Siewiora54c9792012-01-13 21:51:47 +01001299 struct dummy *dum = dum_hcd->dum;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300 struct dummy_request *req;
1301
1302top:
1303 /* if there's no request queued, the device is NAKing; return */
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001304 list_for_each_entry(req, &ep->queue, queue) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 unsigned host_len, dev_len, len;
1306 int is_short, to_host;
1307 int rescan = 0;
1308
Sebastian Andrzej Siewiora54c9792012-01-13 21:51:47 +01001309 if (dummy_ep_stream_en(dum_hcd, urb)) {
1310 if ((urb->stream_id != req->req.stream_id))
1311 continue;
1312 }
1313
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314 /* 1..N packets of ep->ep.maxpacket each ... the last one
1315 * may be short (including zero length).
1316 *
1317 * writer can send a zlp explicitly (length 0) or implicitly
1318 * (length mod maxpacket zero, and 'zero' flag); they always
1319 * terminate reads.
1320 */
1321 host_len = urb->transfer_buffer_length - urb->actual_length;
1322 dev_len = req->req.length - req->req.actual;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001323 len = min(host_len, dev_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324
1325 /* FIXME update emulated data toggle too */
1326
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001327 to_host = usb_pipein(urb->pipe);
1328 if (unlikely(len == 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 is_short = 1;
1330 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331 /* not enough bandwidth left? */
1332 if (limit < ep->ep.maxpacket && limit < len)
1333 break;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001334 len = min_t(unsigned, len, limit);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335 if (len == 0)
1336 break;
1337
1338 /* use an extra pass for the final short packet */
1339 if (len > ep->ep.maxpacket) {
1340 rescan = 1;
1341 len -= (len % ep->ep.maxpacket);
1342 }
1343 is_short = (len % ep->ep.maxpacket) != 0;
1344
Sebastian Andrzej Siewiora04ce202012-01-09 13:14:57 +01001345 len = dummy_perform_transfer(urb, req, len);
1346
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347 ep->last_io = jiffies;
Dan Carpenterb1443ac0e2012-03-02 21:51:00 +03001348 if ((int)len < 0) {
Sebastian Andrzej Siewior14fce332012-01-09 19:30:50 +01001349 req->req.status = len;
1350 } else {
1351 limit -= len;
1352 urb->actual_length += len;
1353 req->req.actual += len;
1354 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355 }
1356
1357 /* short packets terminate, maybe with overflow/underflow.
1358 * it's only really an error to write too much.
1359 *
1360 * partially filling a buffer optionally blocks queue advances
1361 * (so completion handlers can clean up the queue) but we don't
Alan Sternb0d9efb2007-08-21 15:39:21 -04001362 * need to emulate such data-in-flight.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363 */
1364 if (is_short) {
1365 if (host_len == dev_len) {
1366 req->req.status = 0;
Alan Stern4d2f1102007-08-24 15:40:10 -04001367 *status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368 } else if (to_host) {
1369 req->req.status = 0;
1370 if (dev_len > host_len)
Alan Stern4d2f1102007-08-24 15:40:10 -04001371 *status = -EOVERFLOW;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372 else
Alan Stern4d2f1102007-08-24 15:40:10 -04001373 *status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374 } else if (!to_host) {
Alan Stern4d2f1102007-08-24 15:40:10 -04001375 *status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376 if (host_len > dev_len)
1377 req->req.status = -EOVERFLOW;
1378 else
1379 req->req.status = 0;
1380 }
1381
1382 /* many requests terminate without a short packet */
1383 } else {
1384 if (req->req.length == req->req.actual
1385 && !req->req.zero)
1386 req->req.status = 0;
1387 if (urb->transfer_buffer_length == urb->actual_length
1388 && !(urb->transfer_flags
Alan Stern4d2f1102007-08-24 15:40:10 -04001389 & URB_ZERO_PACKET))
1390 *status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391 }
1392
1393 /* device side completion --> continuable */
1394 if (req->req.status != -EINPROGRESS) {
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001395 list_del_init(&req->queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001397 spin_unlock(&dum->lock);
1398 req->req.complete(&ep->ep, &req->req);
1399 spin_lock(&dum->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400
1401 /* requests might have been unlinked... */
1402 rescan = 1;
1403 }
1404
1405 /* host side completion --> terminate */
Alan Stern4d2f1102007-08-24 15:40:10 -04001406 if (*status != -EINPROGRESS)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407 break;
1408
1409 /* rescan to continue with any other queued i/o */
1410 if (rescan)
1411 goto top;
1412 }
1413 return limit;
1414}
1415
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001416static int periodic_bytes(struct dummy *dum, struct dummy_ep *ep)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417{
1418 int limit = ep->ep.maxpacket;
1419
1420 if (dum->gadget.speed == USB_SPEED_HIGH) {
1421 int tmp;
1422
1423 /* high bandwidth mode */
Kuninori Morimoto29cc8892011-08-23 03:12:03 -07001424 tmp = usb_endpoint_maxp(ep->desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425 tmp = (tmp >> 11) & 0x03;
1426 tmp *= 8 /* applies to entire frame */;
1427 limit += limit * tmp;
1428 }
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03001429 if (dum->gadget.speed == USB_SPEED_SUPER) {
Sebastian Andrzej Siewior59f08e62012-01-12 12:53:14 +01001430 switch (usb_endpoint_type(ep->desc)) {
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03001431 case USB_ENDPOINT_XFER_ISOC:
1432 /* Sec. 4.4.8.2 USB3.0 Spec */
1433 limit = 3 * 16 * 1024 * 8;
1434 break;
1435 case USB_ENDPOINT_XFER_INT:
1436 /* Sec. 4.4.7.2 USB3.0 Spec */
1437 limit = 3 * 1024 * 8;
1438 break;
1439 case USB_ENDPOINT_XFER_BULK:
1440 default:
1441 break;
1442 }
1443 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444 return limit;
1445}
1446
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001447#define is_active(dum_hcd) ((dum_hcd->port_status & \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448 (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
1449 USB_PORT_STAT_SUSPEND)) \
1450 == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
1451
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001452static struct dummy_ep *find_endpoint(struct dummy *dum, u8 address)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453{
1454 int i;
1455
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03001456 if (!is_active((dum->gadget.speed == USB_SPEED_SUPER ?
1457 dum->ss_hcd : dum->hs_hcd)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458 return NULL;
1459 if ((address & ~USB_DIR_IN) == 0)
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001460 return &dum->ep[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461 for (i = 1; i < DUMMY_ENDPOINTS; i++) {
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001462 struct dummy_ep *ep = &dum->ep[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463
1464 if (!ep->desc)
1465 continue;
1466 if (ep->desc->bEndpointAddress == address)
1467 return ep;
1468 }
1469 return NULL;
1470}
1471
1472#undef is_active
1473
1474#define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
1475#define Dev_InRequest (Dev_Request | USB_DIR_IN)
1476#define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
1477#define Intf_InRequest (Intf_Request | USB_DIR_IN)
1478#define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
1479#define Ep_InRequest (Ep_Request | USB_DIR_IN)
1480
Tatyana Brokhman8be8a9d2010-11-01 17:38:05 +02001481
1482/**
1483 * handle_control_request() - handles all control transfers
1484 * @dum: pointer to dummy (the_controller)
1485 * @urb: the urb request to handle
1486 * @setup: pointer to the setup data for a USB device control
1487 * request
1488 * @status: pointer to request handling status
1489 *
1490 * Return 0 - if the request was handled
1491 * 1 - if the request wasn't handles
1492 * error code on error
1493 */
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001494static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb,
Tatyana Brokhman8be8a9d2010-11-01 17:38:05 +02001495 struct usb_ctrlrequest *setup,
1496 int *status)
1497{
1498 struct dummy_ep *ep2;
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001499 struct dummy *dum = dum_hcd->dum;
Tatyana Brokhman8be8a9d2010-11-01 17:38:05 +02001500 int ret_val = 1;
1501 unsigned w_index;
1502 unsigned w_value;
1503
1504 w_index = le16_to_cpu(setup->wIndex);
1505 w_value = le16_to_cpu(setup->wValue);
1506 switch (setup->bRequest) {
1507 case USB_REQ_SET_ADDRESS:
1508 if (setup->bRequestType != Dev_Request)
1509 break;
1510 dum->address = w_value;
1511 *status = 0;
1512 dev_dbg(udc_dev(dum), "set_address = %d\n",
1513 w_value);
1514 ret_val = 0;
1515 break;
1516 case USB_REQ_SET_FEATURE:
1517 if (setup->bRequestType == Dev_Request) {
1518 ret_val = 0;
1519 switch (w_value) {
1520 case USB_DEVICE_REMOTE_WAKEUP:
1521 break;
1522 case USB_DEVICE_B_HNP_ENABLE:
1523 dum->gadget.b_hnp_enable = 1;
1524 break;
1525 case USB_DEVICE_A_HNP_SUPPORT:
1526 dum->gadget.a_hnp_support = 1;
1527 break;
1528 case USB_DEVICE_A_ALT_HNP_SUPPORT:
1529 dum->gadget.a_alt_hnp_support = 1;
1530 break;
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03001531 case USB_DEVICE_U1_ENABLE:
1532 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1533 HCD_USB3)
1534 w_value = USB_DEV_STAT_U1_ENABLED;
1535 else
1536 ret_val = -EOPNOTSUPP;
1537 break;
1538 case USB_DEVICE_U2_ENABLE:
1539 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1540 HCD_USB3)
1541 w_value = USB_DEV_STAT_U2_ENABLED;
1542 else
1543 ret_val = -EOPNOTSUPP;
1544 break;
1545 case USB_DEVICE_LTM_ENABLE:
1546 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1547 HCD_USB3)
1548 w_value = USB_DEV_STAT_LTM_ENABLED;
1549 else
1550 ret_val = -EOPNOTSUPP;
1551 break;
Tatyana Brokhman8be8a9d2010-11-01 17:38:05 +02001552 default:
1553 ret_val = -EOPNOTSUPP;
1554 }
1555 if (ret_val == 0) {
1556 dum->devstatus |= (1 << w_value);
1557 *status = 0;
1558 }
1559 } else if (setup->bRequestType == Ep_Request) {
1560 /* endpoint halt */
1561 ep2 = find_endpoint(dum, w_index);
1562 if (!ep2 || ep2->ep.name == ep0name) {
1563 ret_val = -EOPNOTSUPP;
1564 break;
1565 }
1566 ep2->halted = 1;
1567 ret_val = 0;
1568 *status = 0;
1569 }
1570 break;
1571 case USB_REQ_CLEAR_FEATURE:
1572 if (setup->bRequestType == Dev_Request) {
1573 ret_val = 0;
1574 switch (w_value) {
1575 case USB_DEVICE_REMOTE_WAKEUP:
1576 w_value = USB_DEVICE_REMOTE_WAKEUP;
1577 break;
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03001578 case USB_DEVICE_U1_ENABLE:
1579 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1580 HCD_USB3)
1581 w_value = USB_DEV_STAT_U1_ENABLED;
1582 else
1583 ret_val = -EOPNOTSUPP;
1584 break;
1585 case USB_DEVICE_U2_ENABLE:
1586 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1587 HCD_USB3)
1588 w_value = USB_DEV_STAT_U2_ENABLED;
1589 else
1590 ret_val = -EOPNOTSUPP;
1591 break;
1592 case USB_DEVICE_LTM_ENABLE:
1593 if (dummy_hcd_to_hcd(dum_hcd)->speed ==
1594 HCD_USB3)
1595 w_value = USB_DEV_STAT_LTM_ENABLED;
1596 else
1597 ret_val = -EOPNOTSUPP;
1598 break;
Tatyana Brokhman8be8a9d2010-11-01 17:38:05 +02001599 default:
1600 ret_val = -EOPNOTSUPP;
1601 break;
1602 }
1603 if (ret_val == 0) {
1604 dum->devstatus &= ~(1 << w_value);
1605 *status = 0;
1606 }
1607 } else if (setup->bRequestType == Ep_Request) {
1608 /* endpoint halt */
1609 ep2 = find_endpoint(dum, w_index);
1610 if (!ep2) {
1611 ret_val = -EOPNOTSUPP;
1612 break;
1613 }
1614 if (!ep2->wedged)
1615 ep2->halted = 0;
1616 ret_val = 0;
1617 *status = 0;
1618 }
1619 break;
1620 case USB_REQ_GET_STATUS:
1621 if (setup->bRequestType == Dev_InRequest
1622 || setup->bRequestType == Intf_InRequest
1623 || setup->bRequestType == Ep_InRequest) {
1624 char *buf;
1625 /*
1626 * device: remote wakeup, selfpowered
1627 * interface: nothing
1628 * endpoint: halt
1629 */
1630 buf = (char *)urb->transfer_buffer;
1631 if (urb->transfer_buffer_length > 0) {
1632 if (setup->bRequestType == Ep_InRequest) {
1633 ep2 = find_endpoint(dum, w_index);
1634 if (!ep2) {
1635 ret_val = -EOPNOTSUPP;
1636 break;
1637 }
1638 buf[0] = ep2->halted;
1639 } else if (setup->bRequestType ==
1640 Dev_InRequest) {
1641 buf[0] = (u8)dum->devstatus;
1642 } else
1643 buf[0] = 0;
1644 }
1645 if (urb->transfer_buffer_length > 1)
1646 buf[1] = 0;
1647 urb->actual_length = min_t(u32, 2,
1648 urb->transfer_buffer_length);
1649 ret_val = 0;
1650 *status = 0;
1651 }
1652 break;
1653 }
1654 return ret_val;
1655}
1656
Linus Torvalds1da177e2005-04-16 15:20:36 -07001657/* drive both sides of the transfers; looks like irq handlers to
1658 * both drivers except the callbacks aren't in_irq().
1659 */
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001660static void dummy_timer(unsigned long _dum_hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001661{
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001662 struct dummy_hcd *dum_hcd = (struct dummy_hcd *) _dum_hcd;
1663 struct dummy *dum = dum_hcd->dum;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001664 struct urbp *urbp, *tmp;
1665 unsigned long flags;
1666 int limit, total;
1667 int i;
1668
1669 /* simplistic model for one frame's bandwidth */
1670 switch (dum->gadget.speed) {
1671 case USB_SPEED_LOW:
1672 total = 8/*bytes*/ * 12/*packets*/;
1673 break;
1674 case USB_SPEED_FULL:
1675 total = 64/*bytes*/ * 19/*packets*/;
1676 break;
1677 case USB_SPEED_HIGH:
1678 total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
1679 break;
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03001680 case USB_SPEED_SUPER:
1681 /* Bus speed is 500000 bytes/ms, so use a little less */
1682 total = 490000;
1683 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001684 default:
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001685 dev_err(dummy_dev(dum_hcd), "bogus device speed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001686 return;
1687 }
1688
1689 /* FIXME if HZ != 1000 this will probably misbehave ... */
1690
1691 /* look at each urb queued by the host side driver */
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001692 spin_lock_irqsave(&dum->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001694 if (!dum_hcd->udev) {
1695 dev_err(dummy_dev(dum_hcd),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696 "timer fired with no URBs pending?\n");
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001697 spin_unlock_irqrestore(&dum->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001698 return;
1699 }
1700
1701 for (i = 0; i < DUMMY_ENDPOINTS; i++) {
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001702 if (!ep_name[i])
Linus Torvalds1da177e2005-04-16 15:20:36 -07001703 break;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001704 dum->ep[i].already_seen = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001705 }
1706
1707restart:
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001708 list_for_each_entry_safe(urbp, tmp, &dum_hcd->urbp_list, urbp_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709 struct urb *urb;
1710 struct dummy_request *req;
1711 u8 address;
1712 struct dummy_ep *ep = NULL;
1713 int type;
Alan Stern4d2f1102007-08-24 15:40:10 -04001714 int status = -EINPROGRESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715
1716 urb = urbp->urb;
Alan Sterneb231052007-08-21 15:40:36 -04001717 if (urb->unlinked)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718 goto return_urb;
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001719 else if (dum_hcd->rh_state != DUMMY_RH_RUNNING)
Alan Stern391eca92005-05-10 15:34:16 -04001720 continue;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001721 type = usb_pipetype(urb->pipe);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001722
1723 /* used up this frame's non-periodic bandwidth?
1724 * FIXME there's infinite bandwidth for control and
1725 * periodic transfers ... unrealistic.
1726 */
1727 if (total <= 0 && type == PIPE_BULK)
1728 continue;
1729
1730 /* find the gadget's ep for this request (if configured) */
1731 address = usb_pipeendpoint (urb->pipe);
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001732 if (usb_pipein(urb->pipe))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001733 address |= USB_DIR_IN;
1734 ep = find_endpoint(dum, address);
1735 if (!ep) {
1736 /* set_configuration() disagreement */
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001737 dev_dbg(dummy_dev(dum_hcd),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001738 "no ep configured for urb %p\n",
1739 urb);
Alan Stern4d2f1102007-08-24 15:40:10 -04001740 status = -EPROTO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001741 goto return_urb;
1742 }
1743
1744 if (ep->already_seen)
1745 continue;
1746 ep->already_seen = 1;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001747 if (ep == &dum->ep[0] && urb->error_count) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001748 ep->setup_stage = 1; /* a new urb */
1749 urb->error_count = 0;
1750 }
1751 if (ep->halted && !ep->setup_stage) {
1752 /* NOTE: must not be iso! */
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001753 dev_dbg(dummy_dev(dum_hcd), "ep %s halted, urb %p\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754 ep->ep.name, urb);
Alan Stern4d2f1102007-08-24 15:40:10 -04001755 status = -EPIPE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756 goto return_urb;
1757 }
1758 /* FIXME make sure both ends agree on maxpacket */
1759
1760 /* handle control requests */
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001761 if (ep == &dum->ep[0] && ep->setup_stage) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762 struct usb_ctrlrequest setup;
1763 int value = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001764
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001765 setup = *(struct usb_ctrlrequest *) urb->setup_packet;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001766 /* paranoia, in case of stale queued data */
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001767 list_for_each_entry(req, &ep->queue, queue) {
1768 list_del_init(&req->queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769 req->req.status = -EOVERFLOW;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001770 dev_dbg(udc_dev(dum), "stale req = %p\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001771 req);
1772
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001773 spin_unlock(&dum->lock);
1774 req->req.complete(&ep->ep, &req->req);
1775 spin_lock(&dum->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776 ep->already_seen = 0;
1777 goto restart;
1778 }
1779
1780 /* gadget driver never sees set_address or operations
1781 * on standard feature flags. some hardware doesn't
1782 * even expose them.
1783 */
1784 ep->last_io = jiffies;
1785 ep->setup_stage = 0;
1786 ep->halted = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001787
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001788 value = handle_control_request(dum_hcd, urb, &setup,
Tatyana Brokhman8be8a9d2010-11-01 17:38:05 +02001789 &status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001790
1791 /* gadget driver handles all other requests. block
1792 * until setup() returns; no reentrancy issues etc.
1793 */
1794 if (value > 0) {
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001795 spin_unlock(&dum->lock);
1796 value = dum->driver->setup(&dum->gadget,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001797 &setup);
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001798 spin_lock(&dum->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799
1800 if (value >= 0) {
1801 /* no delays (max 64KB data stage) */
1802 limit = 64*1024;
1803 goto treat_control_like_bulk;
1804 }
1805 /* error, see below */
1806 }
1807
1808 if (value < 0) {
1809 if (value != -EOPNOTSUPP)
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001810 dev_dbg(udc_dev(dum),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001811 "setup --> %d\n",
1812 value);
Alan Stern4d2f1102007-08-24 15:40:10 -04001813 status = -EPIPE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001814 urb->actual_length = 0;
1815 }
1816
1817 goto return_urb;
1818 }
1819
1820 /* non-control requests */
1821 limit = total;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001822 switch (usb_pipetype(urb->pipe)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001823 case PIPE_ISOCHRONOUS:
1824 /* FIXME is it urb->interval since the last xfer?
1825 * use urb->iso_frame_desc[i].
1826 * complete whether or not ep has requests queued.
1827 * report random errors, to debug drivers.
1828 */
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001829 limit = max(limit, periodic_bytes(dum, ep));
Alan Stern4d2f1102007-08-24 15:40:10 -04001830 status = -ENOSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831 break;
1832
1833 case PIPE_INTERRUPT:
1834 /* FIXME is it urb->interval since the last xfer?
1835 * this almost certainly polls too fast.
1836 */
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001837 limit = max(limit, periodic_bytes(dum, ep));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838 /* FALLTHROUGH */
1839
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840 default:
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001841treat_control_like_bulk:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842 ep->last_io = jiffies;
Sebastian Andrzej Siewiora54c9792012-01-13 21:51:47 +01001843 total = transfer(dum_hcd, urb, ep, limit, &status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001844 break;
1845 }
1846
1847 /* incomplete transfer? */
Alan Stern4d2f1102007-08-24 15:40:10 -04001848 if (status == -EINPROGRESS)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001849 continue;
1850
1851return_urb:
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001852 list_del(&urbp->urbp_list);
1853 kfree(urbp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854 if (ep)
1855 ep->already_seen = ep->setup_stage = 0;
1856
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001857 usb_hcd_unlink_urb_from_ep(dummy_hcd_to_hcd(dum_hcd), urb);
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001858 spin_unlock(&dum->lock);
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001859 usb_hcd_giveback_urb(dummy_hcd_to_hcd(dum_hcd), urb, status);
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001860 spin_lock(&dum->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001861
1862 goto restart;
1863 }
1864
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001865 if (list_empty(&dum_hcd->urbp_list)) {
1866 usb_put_dev(dum_hcd->udev);
1867 dum_hcd->udev = NULL;
1868 } else if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
Alan Stern391eca92005-05-10 15:34:16 -04001869 /* want a 1 msec delay here */
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001870 mod_timer(&dum_hcd->timer, jiffies + msecs_to_jiffies(1));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001871 }
1872
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001873 spin_unlock_irqrestore(&dum->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001874}
1875
1876/*-------------------------------------------------------------------------*/
1877
1878#define PORT_C_MASK \
Alan Sternc2db8b52005-04-29 16:30:48 -04001879 ((USB_PORT_STAT_C_CONNECTION \
1880 | USB_PORT_STAT_C_ENABLE \
1881 | USB_PORT_STAT_C_SUSPEND \
1882 | USB_PORT_STAT_C_OVERCURRENT \
1883 | USB_PORT_STAT_C_RESET) << 16)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001885static int dummy_hub_status(struct usb_hcd *hcd, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001886{
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001887 struct dummy_hcd *dum_hcd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001888 unsigned long flags;
Alan Stern391eca92005-05-10 15:34:16 -04001889 int retval = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001890
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001891 dum_hcd = hcd_to_dummy_hcd(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001892
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001893 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
Alan Stern541c7d42010-06-22 16:39:10 -04001894 if (!HCD_HW_ACCESSIBLE(hcd))
Alan Stern391eca92005-05-10 15:34:16 -04001895 goto done;
Alan Sternf1c39fa2005-05-03 16:24:04 -04001896
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001897 if (dum_hcd->resuming && time_after_eq(jiffies, dum_hcd->re_timeout)) {
1898 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
1899 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
1900 set_link_state(dum_hcd);
Alan Sternf1c39fa2005-05-03 16:24:04 -04001901 }
1902
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001903 if ((dum_hcd->port_status & PORT_C_MASK) != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001904 *buf = (1 << 1);
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001905 dev_dbg(dummy_dev(dum_hcd), "port status 0x%08x has changes\n",
1906 dum_hcd->port_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001907 retval = 1;
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001908 if (dum_hcd->rh_state == DUMMY_RH_SUSPENDED)
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001909 usb_hcd_resume_root_hub(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910 }
Alan Stern391eca92005-05-10 15:34:16 -04001911done:
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001912 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001913 return retval;
1914}
1915
Sebastian Andrzej Siewior3b9c1c52012-08-19 21:54:59 +02001916/* usb 3.0 root hub device descriptor */
1917struct {
1918 struct usb_bos_descriptor bos;
1919 struct usb_ss_cap_descriptor ss_cap;
1920} __packed usb3_bos_desc = {
1921
1922 .bos = {
1923 .bLength = USB_DT_BOS_SIZE,
1924 .bDescriptorType = USB_DT_BOS,
1925 .wTotalLength = cpu_to_le16(sizeof(usb3_bos_desc)),
1926 .bNumDeviceCaps = 1,
1927 },
1928 .ss_cap = {
1929 .bLength = USB_DT_USB_SS_CAP_SIZE,
1930 .bDescriptorType = USB_DT_DEVICE_CAPABILITY,
1931 .bDevCapabilityType = USB_SS_CAP_TYPE,
1932 .wSpeedSupported = cpu_to_le16(USB_5GBPS_OPERATION),
1933 .bFunctionalitySupport = ilog2(USB_5GBPS_OPERATION),
1934 },
1935};
1936
Linus Torvalds1da177e2005-04-16 15:20:36 -07001937static inline void
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03001938ss_hub_descriptor(struct usb_hub_descriptor *desc)
1939{
1940 memset(desc, 0, sizeof *desc);
1941 desc->bDescriptorType = 0x2a;
1942 desc->bDescLength = 12;
1943 desc->wHubCharacteristics = cpu_to_le16(0x0001);
1944 desc->bNbrPorts = 1;
1945 desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/
1946 desc->u.ss.DeviceRemovable = 0xffff;
1947}
1948
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001949static inline void hub_descriptor(struct usb_hub_descriptor *desc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001950{
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001951 memset(desc, 0, sizeof *desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001952 desc->bDescriptorType = 0x29;
1953 desc->bDescLength = 9;
Al Virofd05e722008-04-28 07:00:16 +01001954 desc->wHubCharacteristics = cpu_to_le16(0x0001);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001955 desc->bNbrPorts = 1;
John Youndbe79bb2001-09-17 00:00:00 -07001956 desc->u.hs.DeviceRemovable[0] = 0xff;
1957 desc->u.hs.DeviceRemovable[1] = 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001958}
1959
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01001960static int dummy_hub_control(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001961 struct usb_hcd *hcd,
1962 u16 typeReq,
1963 u16 wValue,
1964 u16 wIndex,
1965 char *buf,
1966 u16 wLength
1967) {
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001968 struct dummy_hcd *dum_hcd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969 int retval = 0;
1970 unsigned long flags;
1971
Alan Stern541c7d42010-06-22 16:39:10 -04001972 if (!HCD_HW_ACCESSIBLE(hcd))
Alan Stern391eca92005-05-10 15:34:16 -04001973 return -ETIMEDOUT;
1974
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001975 dum_hcd = hcd_to_dummy_hcd(hcd);
1976
1977 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001978 switch (typeReq) {
1979 case ClearHubFeature:
1980 break;
1981 case ClearPortFeature:
1982 switch (wValue) {
1983 case USB_PORT_FEAT_SUSPEND:
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03001984 if (hcd->speed == HCD_USB3) {
1985 dev_dbg(dummy_dev(dum_hcd),
1986 "USB_PORT_FEAT_SUSPEND req not "
1987 "supported for USB 3.0 roothub\n");
1988 goto error;
1989 }
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001990 if (dum_hcd->port_status & USB_PORT_STAT_SUSPEND) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001991 /* 20msec resume signaling */
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03001992 dum_hcd->resuming = 1;
1993 dum_hcd->re_timeout = jiffies +
Alan Sternf1c39fa2005-05-03 16:24:04 -04001994 msecs_to_jiffies(20);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001995 }
1996 break;
1997 case USB_PORT_FEAT_POWER:
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03001998 if (hcd->speed == HCD_USB3) {
1999 if (dum_hcd->port_status & USB_PORT_STAT_POWER)
2000 dev_dbg(dummy_dev(dum_hcd),
2001 "power-off\n");
2002 } else
2003 if (dum_hcd->port_status &
2004 USB_SS_PORT_STAT_POWER)
2005 dev_dbg(dummy_dev(dum_hcd),
2006 "power-off\n");
Alan Sternf1c39fa2005-05-03 16:24:04 -04002007 /* FALLS THROUGH */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002008 default:
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002009 dum_hcd->port_status &= ~(1 << wValue);
2010 set_link_state(dum_hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002011 }
2012 break;
2013 case GetHubDescriptor:
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002014 if (hcd->speed == HCD_USB3 &&
2015 (wLength < USB_DT_SS_HUB_SIZE ||
2016 wValue != (USB_DT_SS_HUB << 8))) {
2017 dev_dbg(dummy_dev(dum_hcd),
2018 "Wrong hub descriptor type for "
2019 "USB 3.0 roothub.\n");
2020 goto error;
2021 }
2022 if (hcd->speed == HCD_USB3)
2023 ss_hub_descriptor((struct usb_hub_descriptor *) buf);
2024 else
2025 hub_descriptor((struct usb_hub_descriptor *) buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026 break;
Sebastian Andrzej Siewior3b9c1c52012-08-19 21:54:59 +02002027
2028 case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
2029 if (hcd->speed != HCD_USB3)
2030 goto error;
2031
2032 if ((wValue >> 8) != USB_DT_BOS)
2033 goto error;
2034
2035 memcpy(buf, &usb3_bos_desc, sizeof(usb3_bos_desc));
2036 retval = sizeof(usb3_bos_desc);
2037 break;
2038
Linus Torvalds1da177e2005-04-16 15:20:36 -07002039 case GetHubStatus:
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002040 *(__le32 *) buf = cpu_to_le32(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041 break;
2042 case GetPortStatus:
2043 if (wIndex != 1)
2044 retval = -EPIPE;
2045
2046 /* whoever resets or resumes must GetPortStatus to
2047 * complete it!!
2048 */
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002049 if (dum_hcd->resuming &&
2050 time_after_eq(jiffies, dum_hcd->re_timeout)) {
2051 dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
2052 dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002053 }
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002054 if ((dum_hcd->port_status & USB_PORT_STAT_RESET) != 0 &&
2055 time_after_eq(jiffies, dum_hcd->re_timeout)) {
2056 dum_hcd->port_status |= (USB_PORT_STAT_C_RESET << 16);
2057 dum_hcd->port_status &= ~USB_PORT_STAT_RESET;
2058 if (dum_hcd->dum->pullup) {
2059 dum_hcd->port_status |= USB_PORT_STAT_ENABLE;
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002060
2061 if (hcd->speed < HCD_USB3) {
2062 switch (dum_hcd->dum->gadget.speed) {
2063 case USB_SPEED_HIGH:
2064 dum_hcd->port_status |=
2065 USB_PORT_STAT_HIGH_SPEED;
2066 break;
2067 case USB_SPEED_LOW:
2068 dum_hcd->dum->gadget.ep0->
2069 maxpacket = 8;
2070 dum_hcd->port_status |=
2071 USB_PORT_STAT_LOW_SPEED;
2072 break;
2073 default:
2074 dum_hcd->dum->gadget.speed =
2075 USB_SPEED_FULL;
2076 break;
2077 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002078 }
2079 }
2080 }
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002081 set_link_state(dum_hcd);
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002082 ((__le16 *) buf)[0] = cpu_to_le16(dum_hcd->port_status);
2083 ((__le16 *) buf)[1] = cpu_to_le16(dum_hcd->port_status >> 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084 break;
2085 case SetHubFeature:
2086 retval = -EPIPE;
2087 break;
2088 case SetPortFeature:
2089 switch (wValue) {
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002090 case USB_PORT_FEAT_LINK_STATE:
2091 if (hcd->speed != HCD_USB3) {
2092 dev_dbg(dummy_dev(dum_hcd),
2093 "USB_PORT_FEAT_LINK_STATE req not "
2094 "supported for USB 2.0 roothub\n");
2095 goto error;
2096 }
2097 /*
2098 * Since this is dummy we don't have an actual link so
2099 * there is nothing to do for the SET_LINK_STATE cmd
2100 */
2101 break;
2102 case USB_PORT_FEAT_U1_TIMEOUT:
2103 case USB_PORT_FEAT_U2_TIMEOUT:
2104 /* TODO: add suspend/resume support! */
2105 if (hcd->speed != HCD_USB3) {
2106 dev_dbg(dummy_dev(dum_hcd),
2107 "USB_PORT_FEAT_U1/2_TIMEOUT req not "
2108 "supported for USB 2.0 roothub\n");
2109 goto error;
2110 }
2111 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002112 case USB_PORT_FEAT_SUSPEND:
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002113 /* Applicable only for USB2.0 hub */
2114 if (hcd->speed == HCD_USB3) {
2115 dev_dbg(dummy_dev(dum_hcd),
2116 "USB_PORT_FEAT_SUSPEND req not "
2117 "supported for USB 3.0 roothub\n");
2118 goto error;
2119 }
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002120 if (dum_hcd->active) {
2121 dum_hcd->port_status |= USB_PORT_STAT_SUSPEND;
Alan Sternf1c39fa2005-05-03 16:24:04 -04002122
2123 /* HNP would happen here; for now we
2124 * assume b_bus_req is always true.
2125 */
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002126 set_link_state(dum_hcd);
Alan Sternf1c39fa2005-05-03 16:24:04 -04002127 if (((1 << USB_DEVICE_B_HNP_ENABLE)
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002128 & dum_hcd->dum->devstatus) != 0)
2129 dev_dbg(dummy_dev(dum_hcd),
Alan Stern5742b0c2005-05-02 11:25:17 -04002130 "no HNP yet!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002131 }
2132 break;
Alan Sternf1c39fa2005-05-03 16:24:04 -04002133 case USB_PORT_FEAT_POWER:
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002134 if (hcd->speed == HCD_USB3)
2135 dum_hcd->port_status |= USB_SS_PORT_STAT_POWER;
2136 else
2137 dum_hcd->port_status |= USB_PORT_STAT_POWER;
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002138 set_link_state(dum_hcd);
Alan Sternf1c39fa2005-05-03 16:24:04 -04002139 break;
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002140 case USB_PORT_FEAT_BH_PORT_RESET:
2141 /* Applicable only for USB3.0 hub */
2142 if (hcd->speed != HCD_USB3) {
2143 dev_dbg(dummy_dev(dum_hcd),
2144 "USB_PORT_FEAT_BH_PORT_RESET req not "
2145 "supported for USB 2.0 roothub\n");
2146 goto error;
2147 }
2148 /* FALLS THROUGH */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002149 case USB_PORT_FEAT_RESET:
Alan Sternf1c39fa2005-05-03 16:24:04 -04002150 /* if it's already enabled, disable */
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002151 if (hcd->speed == HCD_USB3) {
2152 dum_hcd->port_status = 0;
2153 dum_hcd->port_status =
2154 (USB_SS_PORT_STAT_POWER |
2155 USB_PORT_STAT_CONNECTION |
2156 USB_PORT_STAT_RESET);
2157 } else
2158 dum_hcd->port_status &= ~(USB_PORT_STAT_ENABLE
Alan Sternf1c39fa2005-05-03 16:24:04 -04002159 | USB_PORT_STAT_LOW_SPEED
2160 | USB_PORT_STAT_HIGH_SPEED);
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002161 /*
2162 * We want to reset device status. All but the
2163 * Self powered feature
2164 */
2165 dum_hcd->dum->devstatus &=
2166 (1 << USB_DEVICE_SELF_POWERED);
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002167 /*
2168 * FIXME USB3.0: what is the correct reset signaling
2169 * interval? Is it still 50msec as for HS?
2170 */
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002171 dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50);
Alan Sternf1c39fa2005-05-03 16:24:04 -04002172 /* FALLS THROUGH */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002173 default:
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002174 if (hcd->speed == HCD_USB3) {
2175 if ((dum_hcd->port_status &
2176 USB_SS_PORT_STAT_POWER) != 0) {
2177 dum_hcd->port_status |= (1 << wValue);
2178 set_link_state(dum_hcd);
2179 }
2180 } else
2181 if ((dum_hcd->port_status &
2182 USB_PORT_STAT_POWER) != 0) {
2183 dum_hcd->port_status |= (1 << wValue);
2184 set_link_state(dum_hcd);
2185 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002186 }
2187 break;
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002188 case GetPortErrorCount:
2189 if (hcd->speed != HCD_USB3) {
2190 dev_dbg(dummy_dev(dum_hcd),
2191 "GetPortErrorCount req not "
2192 "supported for USB 2.0 roothub\n");
2193 goto error;
2194 }
2195 /* We'll always return 0 since this is a dummy hub */
2196 *(__le32 *) buf = cpu_to_le32(0);
2197 break;
2198 case SetHubDepth:
2199 if (hcd->speed != HCD_USB3) {
2200 dev_dbg(dummy_dev(dum_hcd),
2201 "SetHubDepth req not supported for "
2202 "USB 2.0 roothub\n");
2203 goto error;
2204 }
2205 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206 default:
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002207 dev_dbg(dummy_dev(dum_hcd),
Linus Torvalds1da177e2005-04-16 15:20:36 -07002208 "hub control req%04x v%04x i%04x l%d\n",
2209 typeReq, wValue, wIndex, wLength);
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002210error:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002211 /* "protocol stall" on error */
2212 retval = -EPIPE;
2213 }
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002214 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
Alan Stern685eb932005-05-03 16:27:26 -04002215
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002216 if ((dum_hcd->port_status & PORT_C_MASK) != 0)
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002217 usb_hcd_poll_rh_status(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002218 return retval;
2219}
2220
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002221static int dummy_bus_suspend(struct usb_hcd *hcd)
Alan Stern391eca92005-05-10 15:34:16 -04002222{
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002223 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
Alan Stern391eca92005-05-10 15:34:16 -04002224
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002225 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
Alan Stern3cf0a222005-11-29 12:08:15 -05002226
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002227 spin_lock_irq(&dum_hcd->dum->lock);
2228 dum_hcd->rh_state = DUMMY_RH_SUSPENDED;
2229 set_link_state(dum_hcd);
Alan Stern3cf0a222005-11-29 12:08:15 -05002230 hcd->state = HC_STATE_SUSPENDED;
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002231 spin_unlock_irq(&dum_hcd->dum->lock);
Alan Stern391eca92005-05-10 15:34:16 -04002232 return 0;
2233}
2234
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002235static int dummy_bus_resume(struct usb_hcd *hcd)
Alan Stern391eca92005-05-10 15:34:16 -04002236{
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002237 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
Alan Stern3cf0a222005-11-29 12:08:15 -05002238 int rc = 0;
2239
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002240 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
Alan Stern391eca92005-05-10 15:34:16 -04002241
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002242 spin_lock_irq(&dum_hcd->dum->lock);
Alan Stern541c7d42010-06-22 16:39:10 -04002243 if (!HCD_HW_ACCESSIBLE(hcd)) {
Alan Sterncfa59da2007-06-21 16:25:35 -04002244 rc = -ESHUTDOWN;
Alan Stern3cf0a222005-11-29 12:08:15 -05002245 } else {
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002246 dum_hcd->rh_state = DUMMY_RH_RUNNING;
2247 set_link_state(dum_hcd);
2248 if (!list_empty(&dum_hcd->urbp_list))
2249 mod_timer(&dum_hcd->timer, jiffies);
Alan Stern3cf0a222005-11-29 12:08:15 -05002250 hcd->state = HC_STATE_RUNNING;
2251 }
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002252 spin_unlock_irq(&dum_hcd->dum->lock);
Alan Stern3cf0a222005-11-29 12:08:15 -05002253 return rc;
Alan Stern391eca92005-05-10 15:34:16 -04002254}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002255
2256/*-------------------------------------------------------------------------*/
2257
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002258static inline ssize_t show_urb(char *buf, size_t size, struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002259{
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002260 int ep = usb_pipeendpoint(urb->pipe);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002261
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002262 return snprintf(buf, size,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002263 "urb/%p %s ep%d%s%s len %d/%d\n",
2264 urb,
2265 ({ char *s;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002266 switch (urb->dev->speed) {
2267 case USB_SPEED_LOW:
Tatyana Brokhman7c884fe2011-06-28 16:33:52 +03002268 s = "ls";
2269 break;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002270 case USB_SPEED_FULL:
Tatyana Brokhman7c884fe2011-06-28 16:33:52 +03002271 s = "fs";
2272 break;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002273 case USB_SPEED_HIGH:
Tatyana Brokhman7c884fe2011-06-28 16:33:52 +03002274 s = "hs";
2275 break;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002276 case USB_SPEED_SUPER:
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002277 s = "ss";
2278 break;
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002279 default:
Tatyana Brokhman7c884fe2011-06-28 16:33:52 +03002280 s = "?";
2281 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002282 }; s; }),
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002283 ep, ep ? (usb_pipein(urb->pipe) ? "in" : "out") : "",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002284 ({ char *s; \
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002285 switch (usb_pipetype(urb->pipe)) { \
2286 case PIPE_CONTROL: \
Tatyana Brokhman7c884fe2011-06-28 16:33:52 +03002287 s = ""; \
2288 break; \
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002289 case PIPE_BULK: \
Tatyana Brokhman7c884fe2011-06-28 16:33:52 +03002290 s = "-bulk"; \
2291 break; \
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002292 case PIPE_INTERRUPT: \
Tatyana Brokhman7c884fe2011-06-28 16:33:52 +03002293 s = "-int"; \
2294 break; \
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002295 default: \
Tatyana Brokhman7c884fe2011-06-28 16:33:52 +03002296 s = "-iso"; \
2297 break; \
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002298 }; s; }),
Linus Torvalds1da177e2005-04-16 15:20:36 -07002299 urb->actual_length, urb->transfer_buffer_length);
2300}
2301
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002302static ssize_t show_urbs(struct device *dev, struct device_attribute *attr,
2303 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002304{
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002305 struct usb_hcd *hcd = dev_get_drvdata(dev);
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002306 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002307 struct urbp *urbp;
2308 size_t size = 0;
2309 unsigned long flags;
2310
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002311 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2312 list_for_each_entry(urbp, &dum_hcd->urbp_list, urbp_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002313 size_t temp;
2314
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002315 temp = show_urb(buf, PAGE_SIZE - size, urbp->urb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002316 buf += temp;
2317 size += temp;
2318 }
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002319 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002320
2321 return size;
2322}
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002323static DEVICE_ATTR(urbs, S_IRUGO, show_urbs, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002324
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002325static int dummy_start_ss(struct dummy_hcd *dum_hcd)
2326{
2327 init_timer(&dum_hcd->timer);
2328 dum_hcd->timer.function = dummy_timer;
2329 dum_hcd->timer.data = (unsigned long)dum_hcd;
2330 dum_hcd->rh_state = DUMMY_RH_RUNNING;
Sebastian Andrzej Siewiora54c9792012-01-13 21:51:47 +01002331 dum_hcd->stream_en_ep = 0;
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002332 INIT_LIST_HEAD(&dum_hcd->urbp_list);
2333 dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET;
2334 dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING;
2335 dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1;
2336#ifdef CONFIG_USB_OTG
2337 dummy_hcd_to_hcd(dum_hcd)->self.otg_port = 1;
2338#endif
2339 return 0;
2340
2341 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
2342 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
2343}
2344
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002345static int dummy_start(struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002346{
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002347 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002348
2349 /*
2350 * MASTER side init ... we emulate a root hub that'll only ever
2351 * talk to one device (the slave side). Also appears in sysfs,
2352 * just like more familiar pci-based HCDs.
2353 */
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002354 if (!usb_hcd_is_primary_hcd(hcd))
2355 return dummy_start_ss(dum_hcd);
2356
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002357 spin_lock_init(&dum_hcd->dum->lock);
2358 init_timer(&dum_hcd->timer);
2359 dum_hcd->timer.function = dummy_timer;
2360 dum_hcd->timer.data = (unsigned long)dum_hcd;
2361 dum_hcd->rh_state = DUMMY_RH_RUNNING;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002362
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002363 INIT_LIST_HEAD(&dum_hcd->urbp_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002364
Alan Sterncaf29f62007-12-06 11:10:39 -05002365 hcd->power_budget = POWER_BUDGET;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002366 hcd->state = HC_STATE_RUNNING;
Alan Stern685eb932005-05-03 16:27:26 -04002367 hcd->uses_new_polling = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002368
Alan Stern5742b0c2005-05-02 11:25:17 -04002369#ifdef CONFIG_USB_OTG
2370 hcd->self.otg_port = 1;
2371#endif
2372
Linus Torvalds1da177e2005-04-16 15:20:36 -07002373 /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002374 return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002375}
2376
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002377static void dummy_stop(struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002378{
2379 struct dummy *dum;
2380
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002381 dum = hcd_to_dummy_hcd(hcd)->dum;
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002382 device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs);
2383 usb_gadget_unregister_driver(dum->driver);
2384 dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002385}
2386
2387/*-------------------------------------------------------------------------*/
2388
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002389static int dummy_h_get_frame(struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002390{
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002391 return dummy_g_get_frame(NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002392}
2393
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002394static int dummy_setup(struct usb_hcd *hcd)
2395{
Sebastian Andrzej Siewiorb100a2f2012-10-29 18:09:56 +01002396 struct dummy *dum;
2397
2398 dum = *((void **)dev_get_platdata(hcd->self.controller));
Sebastian Andrzej Siewior14fce332012-01-09 19:30:50 +01002399 hcd->self.sg_tablesize = ~0;
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002400 if (usb_hcd_is_primary_hcd(hcd)) {
Sebastian Andrzej Siewiorb100a2f2012-10-29 18:09:56 +01002401 dum->hs_hcd = hcd_to_dummy_hcd(hcd);
2402 dum->hs_hcd->dum = dum;
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002403 /*
2404 * Mark the first roothub as being USB 2.0.
2405 * The USB 3.0 roothub will be registered later by
2406 * dummy_hcd_probe()
2407 */
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002408 hcd->speed = HCD_USB2;
2409 hcd->self.root_hub->speed = USB_SPEED_HIGH;
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002410 } else {
Sebastian Andrzej Siewiorb100a2f2012-10-29 18:09:56 +01002411 dum->ss_hcd = hcd_to_dummy_hcd(hcd);
2412 dum->ss_hcd->dum = dum;
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002413 hcd->speed = HCD_USB3;
2414 hcd->self.root_hub->speed = USB_SPEED_SUPER;
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002415 }
2416 return 0;
2417}
2418
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002419/* Change a group of bulk endpoints to support multiple stream IDs */
Sebastian Andrzej Siewiord81f3e42012-01-09 13:15:00 +01002420static int dummy_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev,
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002421 struct usb_host_endpoint **eps, unsigned int num_eps,
2422 unsigned int num_streams, gfp_t mem_flags)
2423{
Sebastian Andrzej Siewiora54c9792012-01-13 21:51:47 +01002424 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2425 unsigned long flags;
2426 int max_stream;
2427 int ret_streams = num_streams;
2428 unsigned int index;
2429 unsigned int i;
2430
2431 if (!num_eps)
2432 return -EINVAL;
2433
2434 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2435 for (i = 0; i < num_eps; i++) {
2436 index = dummy_get_ep_idx(&eps[i]->desc);
2437 if ((1 << index) & dum_hcd->stream_en_ep) {
2438 ret_streams = -EINVAL;
2439 goto out;
2440 }
2441 max_stream = usb_ss_max_streams(&eps[i]->ss_ep_comp);
2442 if (!max_stream) {
2443 ret_streams = -EINVAL;
2444 goto out;
2445 }
2446 if (max_stream < ret_streams) {
2447 dev_dbg(dummy_dev(dum_hcd), "Ep 0x%x only supports %u "
2448 "stream IDs.\n",
2449 eps[i]->desc.bEndpointAddress,
2450 max_stream);
2451 ret_streams = max_stream;
2452 }
2453 }
2454
2455 for (i = 0; i < num_eps; i++) {
2456 index = dummy_get_ep_idx(&eps[i]->desc);
2457 dum_hcd->stream_en_ep |= 1 << index;
2458 set_max_streams_for_pipe(dum_hcd,
2459 usb_endpoint_num(&eps[i]->desc), ret_streams);
2460 }
2461out:
2462 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2463 return ret_streams;
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002464}
2465
2466/* Reverts a group of bulk endpoints back to not using stream IDs. */
Sebastian Andrzej Siewiord81f3e42012-01-09 13:15:00 +01002467static int dummy_free_streams(struct usb_hcd *hcd, struct usb_device *udev,
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002468 struct usb_host_endpoint **eps, unsigned int num_eps,
2469 gfp_t mem_flags)
2470{
Sebastian Andrzej Siewiora54c9792012-01-13 21:51:47 +01002471 struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
2472 unsigned long flags;
2473 int ret;
2474 unsigned int index;
2475 unsigned int i;
2476
2477 spin_lock_irqsave(&dum_hcd->dum->lock, flags);
2478 for (i = 0; i < num_eps; i++) {
2479 index = dummy_get_ep_idx(&eps[i]->desc);
2480 if (!((1 << index) & dum_hcd->stream_en_ep)) {
2481 ret = -EINVAL;
2482 goto out;
2483 }
2484 }
2485
2486 for (i = 0; i < num_eps; i++) {
2487 index = dummy_get_ep_idx(&eps[i]->desc);
2488 dum_hcd->stream_en_ep &= ~(1 << index);
2489 set_max_streams_for_pipe(dum_hcd,
2490 usb_endpoint_num(&eps[i]->desc), 0);
2491 }
2492 ret = 0;
2493out:
2494 spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
2495 return ret;
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002496}
2497
2498static struct hc_driver dummy_hcd = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002499 .description = (char *) driver_name,
2500 .product_desc = "Dummy host controller",
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002501 .hcd_priv_size = sizeof(struct dummy_hcd),
Linus Torvalds1da177e2005-04-16 15:20:36 -07002502
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002503 .flags = HCD_USB3 | HCD_SHARED,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002504
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002505 .reset = dummy_setup,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002506 .start = dummy_start,
2507 .stop = dummy_stop,
2508
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002509 .urb_enqueue = dummy_urb_enqueue,
2510 .urb_dequeue = dummy_urb_dequeue,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002511
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002512 .get_frame_number = dummy_h_get_frame,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002513
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002514 .hub_status_data = dummy_hub_status,
2515 .hub_control = dummy_hub_control,
Alan Stern0c0382e2005-10-13 17:08:02 -04002516 .bus_suspend = dummy_bus_suspend,
2517 .bus_resume = dummy_bus_resume,
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002518
2519 .alloc_streams = dummy_alloc_streams,
2520 .free_streams = dummy_free_streams,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002521};
2522
Alan Stern8364d6b2005-11-14 12:16:30 -05002523static int dummy_hcd_probe(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002524{
Sebastian Andrzej Siewiorb100a2f2012-10-29 18:09:56 +01002525 struct dummy *dum;
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002526 struct usb_hcd *hs_hcd;
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002527 struct usb_hcd *ss_hcd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002528 int retval;
2529
Alan Stern8364d6b2005-11-14 12:16:30 -05002530 dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
Sebastian Andrzej Siewiorb100a2f2012-10-29 18:09:56 +01002531 dum = *((void **)dev_get_platdata(&pdev->dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002532
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002533 if (!mod_data.is_super_speed)
2534 dummy_hcd.flags = HCD_USB2;
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002535 hs_hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev));
2536 if (!hs_hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002537 return -ENOMEM;
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002538 hs_hcd->has_tt = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002539
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002540 retval = usb_add_hcd(hs_hcd, 0, 0);
Sebastian Andrzej Siewior1b68a4c2012-08-19 21:54:58 +02002541 if (retval)
2542 goto put_usb2_hcd;
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002543
2544 if (mod_data.is_super_speed) {
2545 ss_hcd = usb_create_shared_hcd(&dummy_hcd, &pdev->dev,
2546 dev_name(&pdev->dev), hs_hcd);
2547 if (!ss_hcd) {
2548 retval = -ENOMEM;
2549 goto dealloc_usb2_hcd;
2550 }
2551
2552 retval = usb_add_hcd(ss_hcd, 0, 0);
2553 if (retval)
2554 goto put_usb3_hcd;
2555 }
2556 return 0;
2557
2558put_usb3_hcd:
2559 usb_put_hcd(ss_hcd);
2560dealloc_usb2_hcd:
Sebastian Andrzej Siewior1b68a4c2012-08-19 21:54:58 +02002561 usb_remove_hcd(hs_hcd);
2562put_usb2_hcd:
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002563 usb_put_hcd(hs_hcd);
Sebastian Andrzej Siewiorb100a2f2012-10-29 18:09:56 +01002564 dum->hs_hcd = dum->ss_hcd = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002565 return retval;
2566}
2567
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002568static int dummy_hcd_remove(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002569{
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002570 struct dummy *dum;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002571
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002572 dum = hcd_to_dummy_hcd(platform_get_drvdata(pdev))->dum;
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002573
2574 if (dum->ss_hcd) {
2575 usb_remove_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2576 usb_put_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
2577 }
2578
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002579 usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
2580 usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
Tatyana Brokhman1cd8fd22011-06-29 16:41:52 +03002581
Sebastian Andrzej Siewiorb100a2f2012-10-29 18:09:56 +01002582 dum->hs_hcd = NULL;
2583 dum->ss_hcd = NULL;
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002584
Alan Sternd9b76252005-05-03 16:15:43 -04002585 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002586}
2587
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002588static int dummy_hcd_suspend(struct platform_device *pdev, pm_message_t state)
Alan Stern391eca92005-05-10 15:34:16 -04002589{
2590 struct usb_hcd *hcd;
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002591 struct dummy_hcd *dum_hcd;
Alan Stern3cf0a222005-11-29 12:08:15 -05002592 int rc = 0;
Alan Stern391eca92005-05-10 15:34:16 -04002593
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002594 dev_dbg(&pdev->dev, "%s\n", __func__);
Alan Stern391eca92005-05-10 15:34:16 -04002595
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002596 hcd = platform_get_drvdata(pdev);
Tatyana Brokhmancdfcbd22011-06-29 16:41:51 +03002597 dum_hcd = hcd_to_dummy_hcd(hcd);
2598 if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
Alan Stern3cf0a222005-11-29 12:08:15 -05002599 dev_warn(&pdev->dev, "Root hub isn't suspended!\n");
2600 rc = -EBUSY;
2601 } else
2602 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
2603 return rc;
Alan Stern391eca92005-05-10 15:34:16 -04002604}
2605
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002606static int dummy_hcd_resume(struct platform_device *pdev)
Alan Stern391eca92005-05-10 15:34:16 -04002607{
2608 struct usb_hcd *hcd;
2609
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002610 dev_dbg(&pdev->dev, "%s\n", __func__);
Alan Stern391eca92005-05-10 15:34:16 -04002611
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002612 hcd = platform_get_drvdata(pdev);
Alan Stern3cf0a222005-11-29 12:08:15 -05002613 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002614 usb_hcd_poll_rh_status(hcd);
Alan Stern391eca92005-05-10 15:34:16 -04002615 return 0;
2616}
2617
Russell King3ae5eae2005-11-09 22:32:44 +00002618static struct platform_driver dummy_hcd_driver = {
Alan Sternd9b76252005-05-03 16:15:43 -04002619 .probe = dummy_hcd_probe,
2620 .remove = dummy_hcd_remove,
Alan Stern391eca92005-05-10 15:34:16 -04002621 .suspend = dummy_hcd_suspend,
2622 .resume = dummy_hcd_resume,
Russell King3ae5eae2005-11-09 22:32:44 +00002623 .driver = {
2624 .name = (char *) driver_name,
2625 .owner = THIS_MODULE,
2626 },
Alan Sternd9b76252005-05-03 16:15:43 -04002627};
2628
Linus Torvalds1da177e2005-04-16 15:20:36 -07002629/*-------------------------------------------------------------------------*/
Sebastian Andrzej Siewiorb100a2f2012-10-29 18:09:56 +01002630#define MAX_NUM_UDC 2
Sebastian Andrzej Siewiorb2113132012-10-30 12:53:17 +01002631static struct platform_device *the_udc_pdev[MAX_NUM_UDC];
2632static struct platform_device *the_hcd_pdev[MAX_NUM_UDC];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002633
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002634static int __init init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002635{
Alan Sterna89a2cd2008-04-07 15:03:25 -04002636 int retval = -ENOMEM;
Sebastian Andrzej Siewiorc7a1db42012-10-29 18:09:55 +01002637 int i;
Sebastian Andrzej Siewiorb100a2f2012-10-29 18:09:56 +01002638 struct dummy *dum[MAX_NUM_UDC];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002639
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002640 if (usb_disabled())
Linus Torvalds1da177e2005-04-16 15:20:36 -07002641 return -ENODEV;
Alan Sternd9b76252005-05-03 16:15:43 -04002642
Tatyana Brokhman7eca4c52011-06-29 16:41:53 +03002643 if (!mod_data.is_high_speed && mod_data.is_super_speed)
2644 return -EINVAL;
2645
Sebastian Andrzej Siewiorc7a1db42012-10-29 18:09:55 +01002646 if (mod_data.num < 1 || mod_data.num > MAX_NUM_UDC) {
2647 pr_err("Number of emulated UDC must be in range of 1…%d\n",
2648 MAX_NUM_UDC);
2649 return -EINVAL;
2650 }
Sebastian Andrzej Siewiorb100a2f2012-10-29 18:09:56 +01002651
Sebastian Andrzej Siewiorc7a1db42012-10-29 18:09:55 +01002652 for (i = 0; i < mod_data.num; i++) {
2653 the_hcd_pdev[i] = platform_device_alloc(driver_name, i);
2654 if (!the_hcd_pdev[i]) {
2655 i--;
2656 while (i >= 0)
2657 platform_device_put(the_hcd_pdev[i--]);
2658 return retval;
2659 }
2660 }
2661 for (i = 0; i < mod_data.num; i++) {
2662 the_udc_pdev[i] = platform_device_alloc(gadget_name, i);
2663 if (!the_udc_pdev[i]) {
2664 i--;
2665 while (i >= 0)
2666 platform_device_put(the_udc_pdev[i--]);
2667 goto err_alloc_udc;
2668 }
2669 }
Sebastian Andrzej Siewiorb100a2f2012-10-29 18:09:56 +01002670 for (i = 0; i < mod_data.num; i++) {
2671 dum[i] = kzalloc(sizeof(struct dummy), GFP_KERNEL);
2672 if (!dum[i])
2673 goto err_add_pdata;
2674 retval = platform_device_add_data(the_hcd_pdev[i], &dum[i],
2675 sizeof(void *));
2676 if (retval)
2677 goto err_add_pdata;
2678 retval = platform_device_add_data(the_udc_pdev[i], &dum[i],
2679 sizeof(void *));
2680 if (retval)
2681 goto err_add_pdata;
2682 }
Alan Sternd9b76252005-05-03 16:15:43 -04002683
Alan Sterna89a2cd2008-04-07 15:03:25 -04002684 retval = platform_driver_register(&dummy_hcd_driver);
2685 if (retval < 0)
Sebastian Andrzej Siewiorb100a2f2012-10-29 18:09:56 +01002686 goto err_add_pdata;
Alan Sterna89a2cd2008-04-07 15:03:25 -04002687 retval = platform_driver_register(&dummy_udc_driver);
Alan Sternd9b76252005-05-03 16:15:43 -04002688 if (retval < 0)
2689 goto err_register_udc_driver;
2690
Sebastian Andrzej Siewiorc7a1db42012-10-29 18:09:55 +01002691 for (i = 0; i < mod_data.num; i++) {
2692 retval = platform_device_add(the_hcd_pdev[i]);
2693 if (retval < 0) {
2694 i--;
2695 while (i >= 0)
2696 platform_device_del(the_hcd_pdev[i--]);
2697 goto err_add_hcd;
2698 }
2699 }
Sebastian Andrzej Siewiorb100a2f2012-10-29 18:09:56 +01002700 for (i = 0; i < mod_data.num; i++) {
2701 if (!dum[i]->hs_hcd ||
2702 (!dum[i]->ss_hcd && mod_data.is_super_speed)) {
2703 /*
2704 * The hcd was added successfully but its probe
2705 * function failed for some reason.
2706 */
2707 retval = -EINVAL;
2708 goto err_add_udc;
2709 }
Sebastian Andrzej Siewior865835f2011-04-15 20:37:06 +02002710 }
Sebastian Andrzej Siewiorc7a1db42012-10-29 18:09:55 +01002711
Sebastian Andrzej Siewiorc7a1db42012-10-29 18:09:55 +01002712 for (i = 0; i < mod_data.num; i++) {
2713 retval = platform_device_add(the_udc_pdev[i]);
2714 if (retval < 0) {
2715 i--;
2716 while (i >= 0)
2717 platform_device_del(the_udc_pdev[i]);
2718 goto err_add_udc;
2719 }
2720 }
2721
2722 for (i = 0; i < mod_data.num; i++) {
2723 if (!platform_get_drvdata(the_udc_pdev[i])) {
2724 /*
2725 * The udc was added successfully but its probe
2726 * function failed for some reason.
2727 */
2728 retval = -EINVAL;
2729 goto err_probe_udc;
2730 }
Sebastian Andrzej Siewior865835f2011-04-15 20:37:06 +02002731 }
Alan Sternd9b76252005-05-03 16:15:43 -04002732 return retval;
2733
Sebastian Andrzej Siewior865835f2011-04-15 20:37:06 +02002734err_probe_udc:
Sebastian Andrzej Siewiorc7a1db42012-10-29 18:09:55 +01002735 for (i = 0; i < mod_data.num; i++)
2736 platform_device_del(the_udc_pdev[i]);
Alan Sterna89a2cd2008-04-07 15:03:25 -04002737err_add_udc:
Sebastian Andrzej Siewiorc7a1db42012-10-29 18:09:55 +01002738 for (i = 0; i < mod_data.num; i++)
2739 platform_device_del(the_hcd_pdev[i]);
Alan Sterna89a2cd2008-04-07 15:03:25 -04002740err_add_hcd:
2741 platform_driver_unregister(&dummy_udc_driver);
Alan Sternd9b76252005-05-03 16:15:43 -04002742err_register_udc_driver:
Alan Sterna89a2cd2008-04-07 15:03:25 -04002743 platform_driver_unregister(&dummy_hcd_driver);
Sebastian Andrzej Siewiorb100a2f2012-10-29 18:09:56 +01002744err_add_pdata:
2745 for (i = 0; i < mod_data.num; i++)
2746 kfree(dum[i]);
Sebastian Andrzej Siewiorc7a1db42012-10-29 18:09:55 +01002747 for (i = 0; i < mod_data.num; i++)
2748 platform_device_put(the_udc_pdev[i]);
Alan Sterna89a2cd2008-04-07 15:03:25 -04002749err_alloc_udc:
Sebastian Andrzej Siewiorc7a1db42012-10-29 18:09:55 +01002750 for (i = 0; i < mod_data.num; i++)
2751 platform_device_put(the_hcd_pdev[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002752 return retval;
2753}
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002754module_init(init);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002755
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002756static void __exit cleanup(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002757{
Sebastian Andrzej Siewiorc7a1db42012-10-29 18:09:55 +01002758 int i;
2759
2760 for (i = 0; i < mod_data.num; i++) {
Sebastian Andrzej Siewiorb100a2f2012-10-29 18:09:56 +01002761 struct dummy *dum;
2762
2763 dum = *((void **)dev_get_platdata(&the_udc_pdev[i]->dev));
2764
Sebastian Andrzej Siewiorc7a1db42012-10-29 18:09:55 +01002765 platform_device_unregister(the_udc_pdev[i]);
2766 platform_device_unregister(the_hcd_pdev[i]);
Sebastian Andrzej Siewiorb100a2f2012-10-29 18:09:56 +01002767 kfree(dum);
Sebastian Andrzej Siewiorc7a1db42012-10-29 18:09:55 +01002768 }
Alan Sterna89a2cd2008-04-07 15:03:25 -04002769 platform_driver_unregister(&dummy_udc_driver);
2770 platform_driver_unregister(&dummy_hcd_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002771}
Sebastian Andrzej Siewior18f2cba2012-01-12 12:53:15 +01002772module_exit(cleanup);