Commit | Line | Data |
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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0+ |
1da177e4 LT |
2 | /* |
3 | * dummy_hcd.c -- Dummy/Loopback USB host and device emulator driver. | |
4 | * | |
5 | * Maintainer: Alan Stern <stern@rowland.harvard.edu> | |
6 | * | |
7 | * Copyright (C) 2003 David Brownell | |
8 | * Copyright (C) 2003-2005 Alan Stern | |
1da177e4 LT |
9 | */ |
10 | ||
11 | ||
12 | /* | |
13 | * This exposes a device side "USB gadget" API, driven by requests to a | |
14 | * Linux-USB host controller driver. USB traffic is simulated; there's | |
15 | * no need for USB hardware. Use this with two other drivers: | |
16 | * | |
17 | * - Gadget driver, responding to requests (slave); | |
18 | * - Host-side device driver, as already familiar in Linux. | |
19 | * | |
20 | * Having this all in one kernel can help some stages of development, | |
21 | * bypassing some hardware (and driver) issues. UML could help too. | |
c9f20aaf AS |
22 | * |
23 | * Note: The emulation does not include isochronous transfers! | |
1da177e4 LT |
24 | */ |
25 | ||
1da177e4 LT |
26 | #include <linux/module.h> |
27 | #include <linux/kernel.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/ioport.h> | |
1da177e4 | 30 | #include <linux/slab.h> |
1da177e4 LT |
31 | #include <linux/errno.h> |
32 | #include <linux/init.h> | |
33 | #include <linux/timer.h> | |
34 | #include <linux/list.h> | |
35 | #include <linux/interrupt.h> | |
d052d1be | 36 | #include <linux/platform_device.h> |
1da177e4 | 37 | #include <linux/usb.h> |
9454a57a | 38 | #include <linux/usb/gadget.h> |
27729aad | 39 | #include <linux/usb/hcd.h> |
14fce33a | 40 | #include <linux/scatterlist.h> |
1da177e4 LT |
41 | |
42 | #include <asm/byteorder.h> | |
18f2cbaa | 43 | #include <linux/io.h> |
1da177e4 | 44 | #include <asm/irq.h> |
1da177e4 LT |
45 | #include <asm/unaligned.h> |
46 | ||
1da177e4 | 47 | #define DRIVER_DESC "USB Host+Gadget Emulator" |
391eca9d | 48 | #define DRIVER_VERSION "02 May 2005" |
1da177e4 | 49 | |
caf29f62 AS |
50 | #define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */ |
51 | ||
18f2cbaa SAS |
52 | static const char driver_name[] = "dummy_hcd"; |
53 | static const char driver_desc[] = "USB Host+Gadget Emulator"; | |
1da177e4 | 54 | |
18f2cbaa | 55 | static const char gadget_name[] = "dummy_udc"; |
1da177e4 | 56 | |
18f2cbaa SAS |
57 | MODULE_DESCRIPTION(DRIVER_DESC); |
58 | MODULE_AUTHOR("David Brownell"); | |
59 | MODULE_LICENSE("GPL"); | |
1da177e4 | 60 | |
1cd8fd28 TB |
61 | struct dummy_hcd_module_parameters { |
62 | bool is_super_speed; | |
7eca4c5a | 63 | bool is_high_speed; |
c7a1db45 | 64 | unsigned int num; |
1cd8fd28 TB |
65 | }; |
66 | ||
67 | static struct dummy_hcd_module_parameters mod_data = { | |
7eca4c5a TB |
68 | .is_super_speed = false, |
69 | .is_high_speed = true, | |
c7a1db45 | 70 | .num = 1, |
1cd8fd28 TB |
71 | }; |
72 | module_param_named(is_super_speed, mod_data.is_super_speed, bool, S_IRUGO); | |
73 | MODULE_PARM_DESC(is_super_speed, "true to simulate SuperSpeed connection"); | |
7eca4c5a TB |
74 | module_param_named(is_high_speed, mod_data.is_high_speed, bool, S_IRUGO); |
75 | MODULE_PARM_DESC(is_high_speed, "true to simulate HighSpeed connection"); | |
c7a1db45 SAS |
76 | module_param_named(num, mod_data.num, uint, S_IRUGO); |
77 | MODULE_PARM_DESC(num, "number of emulated controllers"); | |
1da177e4 LT |
78 | /*-------------------------------------------------------------------------*/ |
79 | ||
80 | /* gadget side driver data structres */ | |
81 | struct dummy_ep { | |
82 | struct list_head queue; | |
83 | unsigned long last_io; /* jiffies timestamp */ | |
84 | struct usb_gadget *gadget; | |
85 | const struct usb_endpoint_descriptor *desc; | |
86 | struct usb_ep ep; | |
18f2cbaa SAS |
87 | unsigned halted:1; |
88 | unsigned wedged:1; | |
89 | unsigned already_seen:1; | |
90 | unsigned setup_stage:1; | |
a54c979f | 91 | unsigned stream_en:1; |
1da177e4 LT |
92 | }; |
93 | ||
94 | struct dummy_request { | |
95 | struct list_head queue; /* ep's requests */ | |
96 | struct usb_request req; | |
97 | }; | |
98 | ||
18f2cbaa | 99 | static inline struct dummy_ep *usb_ep_to_dummy_ep(struct usb_ep *_ep) |
1da177e4 | 100 | { |
18f2cbaa | 101 | return container_of(_ep, struct dummy_ep, ep); |
1da177e4 LT |
102 | } |
103 | ||
104 | static inline struct dummy_request *usb_request_to_dummy_request | |
105 | (struct usb_request *_req) | |
106 | { | |
18f2cbaa | 107 | return container_of(_req, struct dummy_request, req); |
1da177e4 LT |
108 | } |
109 | ||
110 | /*-------------------------------------------------------------------------*/ | |
111 | ||
112 | /* | |
113 | * Every device has ep0 for control requests, plus up to 30 more endpoints, | |
114 | * in one of two types: | |
115 | * | |
116 | * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint | |
117 | * number can be changed. Names like "ep-a" are used for this type. | |
118 | * | |
119 | * - Fixed Function: in other cases. some characteristics may be mutable; | |
120 | * that'd be hardware-specific. Names like "ep12out-bulk" are used. | |
121 | * | |
122 | * Gadget drivers are responsible for not setting up conflicting endpoint | |
123 | * configurations, illegal or unsupported packet lengths, and so on. | |
124 | */ | |
125 | ||
18f2cbaa | 126 | static const char ep0name[] = "ep0"; |
1da177e4 | 127 | |
7a3b8e70 RB |
128 | static const struct { |
129 | const char *name; | |
130 | const struct usb_ep_caps caps; | |
131 | } ep_info[] = { | |
132 | #define EP_INFO(_name, _caps) \ | |
133 | { \ | |
134 | .name = _name, \ | |
135 | .caps = _caps, \ | |
136 | } | |
1da177e4 | 137 | |
c9f20aaf AS |
138 | /* we don't provide isochronous endpoints since we don't support them */ |
139 | #define TYPE_BULK_OR_INT (USB_EP_CAPS_TYPE_BULK | USB_EP_CAPS_TYPE_INT) | |
140 | ||
7a3b8e70 RB |
141 | /* everyone has ep0 */ |
142 | EP_INFO(ep0name, | |
143 | USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)), | |
1d16638e | 144 | /* act like a pxa250: fifteen fixed function endpoints */ |
7a3b8e70 RB |
145 | EP_INFO("ep1in-bulk", |
146 | USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)), | |
147 | EP_INFO("ep2out-bulk", | |
148 | USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)), | |
c9f20aaf | 149 | /* |
7a3b8e70 RB |
150 | EP_INFO("ep3in-iso", |
151 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)), | |
152 | EP_INFO("ep4out-iso", | |
153 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)), | |
c9f20aaf | 154 | */ |
7a3b8e70 RB |
155 | EP_INFO("ep5in-int", |
156 | USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)), | |
157 | EP_INFO("ep6in-bulk", | |
158 | USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)), | |
159 | EP_INFO("ep7out-bulk", | |
160 | USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)), | |
c9f20aaf | 161 | /* |
7a3b8e70 RB |
162 | EP_INFO("ep8in-iso", |
163 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)), | |
164 | EP_INFO("ep9out-iso", | |
165 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)), | |
c9f20aaf | 166 | */ |
7a3b8e70 RB |
167 | EP_INFO("ep10in-int", |
168 | USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)), | |
169 | EP_INFO("ep11in-bulk", | |
170 | USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)), | |
171 | EP_INFO("ep12out-bulk", | |
172 | USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)), | |
c9f20aaf | 173 | /* |
7a3b8e70 RB |
174 | EP_INFO("ep13in-iso", |
175 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)), | |
176 | EP_INFO("ep14out-iso", | |
177 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)), | |
c9f20aaf | 178 | */ |
7a3b8e70 RB |
179 | EP_INFO("ep15in-int", |
180 | USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)), | |
c9f20aaf | 181 | |
1da177e4 | 182 | /* or like sa1100: two fixed function endpoints */ |
7a3b8e70 RB |
183 | EP_INFO("ep1out-bulk", |
184 | USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)), | |
185 | EP_INFO("ep2in-bulk", | |
186 | USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)), | |
c9f20aaf | 187 | |
1d16638e | 188 | /* and now some generic EPs so we have enough in multi config */ |
7a3b8e70 | 189 | EP_INFO("ep3out", |
c9f20aaf | 190 | USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)), |
7a3b8e70 | 191 | EP_INFO("ep4in", |
c9f20aaf | 192 | USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_IN)), |
7a3b8e70 | 193 | EP_INFO("ep5out", |
c9f20aaf | 194 | USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)), |
7a3b8e70 | 195 | EP_INFO("ep6out", |
c9f20aaf | 196 | USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)), |
7a3b8e70 | 197 | EP_INFO("ep7in", |
c9f20aaf | 198 | USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_IN)), |
7a3b8e70 | 199 | EP_INFO("ep8out", |
c9f20aaf | 200 | USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)), |
7a3b8e70 | 201 | EP_INFO("ep9in", |
c9f20aaf | 202 | USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_IN)), |
7a3b8e70 | 203 | EP_INFO("ep10out", |
c9f20aaf | 204 | USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)), |
7a3b8e70 | 205 | EP_INFO("ep11out", |
c9f20aaf | 206 | USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)), |
7a3b8e70 | 207 | EP_INFO("ep12in", |
c9f20aaf | 208 | USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_IN)), |
7a3b8e70 | 209 | EP_INFO("ep13out", |
c9f20aaf | 210 | USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)), |
7a3b8e70 | 211 | EP_INFO("ep14in", |
c9f20aaf | 212 | USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_IN)), |
7a3b8e70 | 213 | EP_INFO("ep15out", |
c9f20aaf | 214 | USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)), |
7a3b8e70 RB |
215 | |
216 | #undef EP_INFO | |
1da177e4 | 217 | }; |
7a3b8e70 RB |
218 | |
219 | #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_info) | |
1da177e4 | 220 | |
d9b76251 AS |
221 | /*-------------------------------------------------------------------------*/ |
222 | ||
1da177e4 LT |
223 | #define FIFO_SIZE 64 |
224 | ||
225 | struct urbp { | |
226 | struct urb *urb; | |
227 | struct list_head urbp_list; | |
14fce33a SAS |
228 | struct sg_mapping_iter miter; |
229 | u32 miter_started; | |
1da177e4 LT |
230 | }; |
231 | ||
391eca9d AS |
232 | |
233 | enum dummy_rh_state { | |
234 | DUMMY_RH_RESET, | |
235 | DUMMY_RH_SUSPENDED, | |
236 | DUMMY_RH_RUNNING | |
237 | }; | |
238 | ||
cdfcbd2c TB |
239 | struct dummy_hcd { |
240 | struct dummy *dum; | |
241 | enum dummy_rh_state rh_state; | |
242 | struct timer_list timer; | |
243 | u32 port_status; | |
244 | u32 old_status; | |
245 | unsigned long re_timeout; | |
246 | ||
247 | struct usb_device *udev; | |
248 | struct list_head urbp_list; | |
0173a68b AS |
249 | struct urbp *next_frame_urbp; |
250 | ||
a54c979f SAS |
251 | u32 stream_en_ep; |
252 | u8 num_stream[30 / 2]; | |
cdfcbd2c TB |
253 | |
254 | unsigned active:1; | |
255 | unsigned old_active:1; | |
256 | unsigned resuming:1; | |
257 | }; | |
258 | ||
1da177e4 LT |
259 | struct dummy { |
260 | spinlock_t lock; | |
261 | ||
262 | /* | |
263 | * SLAVE/GADGET side support | |
264 | */ | |
18f2cbaa | 265 | struct dummy_ep ep[DUMMY_ENDPOINTS]; |
1da177e4 | 266 | int address; |
7dbd8f4c | 267 | int callback_usage; |
1da177e4 LT |
268 | struct usb_gadget gadget; |
269 | struct usb_gadget_driver *driver; | |
270 | struct dummy_request fifo_req; | |
18f2cbaa | 271 | u8 fifo_buf[FIFO_SIZE]; |
1da177e4 | 272 | u16 devstatus; |
7dbd8f4c | 273 | unsigned ints_enabled:1; |
391eca9d | 274 | unsigned udc_suspended:1; |
f1c39fad | 275 | unsigned pullup:1; |
1da177e4 LT |
276 | |
277 | /* | |
278 | * MASTER/HOST side support | |
279 | */ | |
cdfcbd2c | 280 | struct dummy_hcd *hs_hcd; |
1cd8fd28 | 281 | struct dummy_hcd *ss_hcd; |
1da177e4 LT |
282 | }; |
283 | ||
cdfcbd2c | 284 | static inline struct dummy_hcd *hcd_to_dummy_hcd(struct usb_hcd *hcd) |
1da177e4 | 285 | { |
cdfcbd2c | 286 | return (struct dummy_hcd *) (hcd->hcd_priv); |
1da177e4 LT |
287 | } |
288 | ||
cdfcbd2c | 289 | static inline struct usb_hcd *dummy_hcd_to_hcd(struct dummy_hcd *dum) |
1da177e4 LT |
290 | { |
291 | return container_of((void *) dum, struct usb_hcd, hcd_priv); | |
292 | } | |
293 | ||
cdfcbd2c | 294 | static inline struct device *dummy_dev(struct dummy_hcd *dum) |
1da177e4 | 295 | { |
cdfcbd2c | 296 | return dummy_hcd_to_hcd(dum)->self.controller; |
1da177e4 LT |
297 | } |
298 | ||
18f2cbaa | 299 | static inline struct device *udc_dev(struct dummy *dum) |
d9b76251 AS |
300 | { |
301 | return dum->gadget.dev.parent; | |
302 | } | |
303 | ||
18f2cbaa | 304 | static inline struct dummy *ep_to_dummy(struct dummy_ep *ep) |
1da177e4 | 305 | { |
18f2cbaa | 306 | return container_of(ep->gadget, struct dummy, gadget); |
1da177e4 LT |
307 | } |
308 | ||
cdfcbd2c | 309 | static inline struct dummy_hcd *gadget_to_dummy_hcd(struct usb_gadget *gadget) |
1da177e4 | 310 | { |
cdfcbd2c | 311 | struct dummy *dum = container_of(gadget, struct dummy, gadget); |
1cd8fd28 TB |
312 | if (dum->gadget.speed == USB_SPEED_SUPER) |
313 | return dum->ss_hcd; | |
314 | else | |
315 | return dum->hs_hcd; | |
1da177e4 LT |
316 | } |
317 | ||
18f2cbaa | 318 | static inline struct dummy *gadget_dev_to_dummy(struct device *dev) |
1da177e4 | 319 | { |
18f2cbaa | 320 | return container_of(dev, struct dummy, gadget.dev); |
1da177e4 LT |
321 | } |
322 | ||
1da177e4 LT |
323 | /*-------------------------------------------------------------------------*/ |
324 | ||
f1c39fad AS |
325 | /* SLAVE/GADGET SIDE UTILITY ROUTINES */ |
326 | ||
327 | /* called with spinlock held */ | |
18f2cbaa | 328 | static void nuke(struct dummy *dum, struct dummy_ep *ep) |
f1c39fad | 329 | { |
18f2cbaa | 330 | while (!list_empty(&ep->queue)) { |
f1c39fad AS |
331 | struct dummy_request *req; |
332 | ||
18f2cbaa SAS |
333 | req = list_entry(ep->queue.next, struct dummy_request, queue); |
334 | list_del_init(&req->queue); | |
f1c39fad AS |
335 | req->req.status = -ESHUTDOWN; |
336 | ||
18f2cbaa | 337 | spin_unlock(&dum->lock); |
304f7e5e | 338 | usb_gadget_giveback_request(&ep->ep, &req->req); |
18f2cbaa | 339 | spin_lock(&dum->lock); |
f1c39fad AS |
340 | } |
341 | } | |
342 | ||
343 | /* caller must hold lock */ | |
18f2cbaa | 344 | static void stop_activity(struct dummy *dum) |
f1c39fad | 345 | { |
bcdbeb84 | 346 | int i; |
f1c39fad AS |
347 | |
348 | /* prevent any more requests */ | |
349 | dum->address = 0; | |
350 | ||
351 | /* The timer is left running so that outstanding URBs can fail */ | |
352 | ||
353 | /* nuke any pending requests first, so driver i/o is quiesced */ | |
bcdbeb84 AS |
354 | for (i = 0; i < DUMMY_ENDPOINTS; ++i) |
355 | nuke(dum, &dum->ep[i]); | |
f1c39fad AS |
356 | |
357 | /* driver now does any non-usb quiescing necessary */ | |
358 | } | |
359 | ||
1cd8fd28 TB |
360 | /** |
361 | * set_link_state_by_speed() - Sets the current state of the link according to | |
362 | * the hcd speed | |
363 | * @dum_hcd: pointer to the dummy_hcd structure to update the link state for | |
364 | * | |
365 | * This function updates the port_status according to the link state and the | |
366 | * speed of the hcd. | |
367 | */ | |
368 | static void set_link_state_by_speed(struct dummy_hcd *dum_hcd) | |
369 | { | |
370 | struct dummy *dum = dum_hcd->dum; | |
371 | ||
372 | if (dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3) { | |
373 | if ((dum_hcd->port_status & USB_SS_PORT_STAT_POWER) == 0) { | |
374 | dum_hcd->port_status = 0; | |
375 | } else if (!dum->pullup || dum->udc_suspended) { | |
376 | /* UDC suspend must cause a disconnect */ | |
377 | dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION | | |
378 | USB_PORT_STAT_ENABLE); | |
379 | if ((dum_hcd->old_status & | |
380 | USB_PORT_STAT_CONNECTION) != 0) | |
381 | dum_hcd->port_status |= | |
382 | (USB_PORT_STAT_C_CONNECTION << 16); | |
383 | } else { | |
384 | /* device is connected and not suspended */ | |
385 | dum_hcd->port_status |= (USB_PORT_STAT_CONNECTION | | |
386 | USB_PORT_STAT_SPEED_5GBPS) ; | |
387 | if ((dum_hcd->old_status & | |
388 | USB_PORT_STAT_CONNECTION) == 0) | |
389 | dum_hcd->port_status |= | |
390 | (USB_PORT_STAT_C_CONNECTION << 16); | |
7661ca09 AB |
391 | if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) && |
392 | (dum_hcd->port_status & | |
393 | USB_PORT_STAT_LINK_STATE) == USB_SS_PORT_LS_U0 && | |
394 | dum_hcd->rh_state != DUMMY_RH_SUSPENDED) | |
1cd8fd28 TB |
395 | dum_hcd->active = 1; |
396 | } | |
397 | } else { | |
398 | if ((dum_hcd->port_status & USB_PORT_STAT_POWER) == 0) { | |
399 | dum_hcd->port_status = 0; | |
400 | } else if (!dum->pullup || dum->udc_suspended) { | |
401 | /* UDC suspend must cause a disconnect */ | |
402 | dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION | | |
403 | USB_PORT_STAT_ENABLE | | |
404 | USB_PORT_STAT_LOW_SPEED | | |
405 | USB_PORT_STAT_HIGH_SPEED | | |
406 | USB_PORT_STAT_SUSPEND); | |
407 | if ((dum_hcd->old_status & | |
408 | USB_PORT_STAT_CONNECTION) != 0) | |
409 | dum_hcd->port_status |= | |
410 | (USB_PORT_STAT_C_CONNECTION << 16); | |
411 | } else { | |
412 | dum_hcd->port_status |= USB_PORT_STAT_CONNECTION; | |
413 | if ((dum_hcd->old_status & | |
414 | USB_PORT_STAT_CONNECTION) == 0) | |
415 | dum_hcd->port_status |= | |
416 | (USB_PORT_STAT_C_CONNECTION << 16); | |
417 | if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0) | |
418 | dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND; | |
419 | else if ((dum_hcd->port_status & | |
420 | USB_PORT_STAT_SUSPEND) == 0 && | |
421 | dum_hcd->rh_state != DUMMY_RH_SUSPENDED) | |
422 | dum_hcd->active = 1; | |
423 | } | |
424 | } | |
425 | } | |
426 | ||
f1c39fad | 427 | /* caller must hold lock */ |
cdfcbd2c | 428 | static void set_link_state(struct dummy_hcd *dum_hcd) |
f1c39fad | 429 | { |
cdfcbd2c | 430 | struct dummy *dum = dum_hcd->dum; |
ab219221 | 431 | unsigned int power_bit; |
cdfcbd2c TB |
432 | |
433 | dum_hcd->active = 0; | |
1cd8fd28 TB |
434 | if (dum->pullup) |
435 | if ((dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3 && | |
436 | dum->gadget.speed != USB_SPEED_SUPER) || | |
437 | (dummy_hcd_to_hcd(dum_hcd)->speed != HCD_USB3 && | |
438 | dum->gadget.speed == USB_SPEED_SUPER)) | |
439 | return; | |
440 | ||
441 | set_link_state_by_speed(dum_hcd); | |
ab219221 AS |
442 | power_bit = (dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3 ? |
443 | USB_SS_PORT_STAT_POWER : USB_PORT_STAT_POWER); | |
f1c39fad | 444 | |
cdfcbd2c TB |
445 | if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0 || |
446 | dum_hcd->active) | |
447 | dum_hcd->resuming = 0; | |
f1c39fad | 448 | |
8480484d | 449 | /* Currently !connected or in reset */ |
ab219221 | 450 | if ((dum_hcd->port_status & power_bit) == 0 || |
cdfcbd2c | 451 | (dum_hcd->port_status & USB_PORT_STAT_RESET) != 0) { |
ab219221 | 452 | unsigned int disconnect = power_bit & |
8480484d | 453 | dum_hcd->old_status & (~dum_hcd->port_status); |
ab219221 | 454 | unsigned int reset = USB_PORT_STAT_RESET & |
8480484d AS |
455 | (~dum_hcd->old_status) & dum_hcd->port_status; |
456 | ||
457 | /* Report reset and disconnect events to the driver */ | |
7dbd8f4c | 458 | if (dum->ints_enabled && (disconnect || reset)) { |
1cd8fd28 | 459 | stop_activity(dum); |
7dbd8f4c AS |
460 | ++dum->callback_usage; |
461 | spin_unlock(&dum->lock); | |
8480484d AS |
462 | if (reset) |
463 | usb_gadget_udc_reset(&dum->gadget, dum->driver); | |
464 | else | |
465 | dum->driver->disconnect(&dum->gadget); | |
7dbd8f4c AS |
466 | spin_lock(&dum->lock); |
467 | --dum->callback_usage; | |
f1c39fad | 468 | } |
7dbd8f4c AS |
469 | } else if (dum_hcd->active != dum_hcd->old_active && |
470 | dum->ints_enabled) { | |
471 | ++dum->callback_usage; | |
472 | spin_unlock(&dum->lock); | |
f16443a0 | 473 | if (dum_hcd->old_active && dum->driver->suspend) |
1cd8fd28 | 474 | dum->driver->suspend(&dum->gadget); |
f16443a0 | 475 | else if (!dum_hcd->old_active && dum->driver->resume) |
1cd8fd28 | 476 | dum->driver->resume(&dum->gadget); |
7dbd8f4c AS |
477 | spin_lock(&dum->lock); |
478 | --dum->callback_usage; | |
f1c39fad AS |
479 | } |
480 | ||
cdfcbd2c TB |
481 | dum_hcd->old_status = dum_hcd->port_status; |
482 | dum_hcd->old_active = dum_hcd->active; | |
f1c39fad AS |
483 | } |
484 | ||
485 | /*-------------------------------------------------------------------------*/ | |
486 | ||
1da177e4 LT |
487 | /* SLAVE/GADGET SIDE DRIVER |
488 | * | |
489 | * This only tracks gadget state. All the work is done when the host | |
490 | * side tries some (emulated) i/o operation. Real device controller | |
491 | * drivers would do real i/o using dma, fifos, irqs, timers, etc. | |
492 | */ | |
493 | ||
494 | #define is_enabled(dum) \ | |
495 | (dum->port_status & USB_PORT_STAT_ENABLE) | |
496 | ||
18f2cbaa SAS |
497 | static int dummy_enable(struct usb_ep *_ep, |
498 | const struct usb_endpoint_descriptor *desc) | |
1da177e4 LT |
499 | { |
500 | struct dummy *dum; | |
cdfcbd2c | 501 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
502 | struct dummy_ep *ep; |
503 | unsigned max; | |
504 | int retval; | |
505 | ||
18f2cbaa | 506 | ep = usb_ep_to_dummy_ep(_ep); |
1da177e4 LT |
507 | if (!_ep || !desc || ep->desc || _ep->name == ep0name |
508 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
509 | return -EINVAL; | |
18f2cbaa | 510 | dum = ep_to_dummy(ep); |
cdfcbd2c TB |
511 | if (!dum->driver) |
512 | return -ESHUTDOWN; | |
719e52cb SAS |
513 | |
514 | dum_hcd = gadget_to_dummy_hcd(&dum->gadget); | |
cdfcbd2c | 515 | if (!is_enabled(dum_hcd)) |
1da177e4 | 516 | return -ESHUTDOWN; |
cdfcbd2c TB |
517 | |
518 | /* | |
519 | * For HS/FS devices only bits 0..10 of the wMaxPacketSize represent the | |
520 | * maximum packet size. | |
1cd8fd28 | 521 | * For SS devices the wMaxPacketSize is limited by 1024. |
cdfcbd2c | 522 | */ |
c2b4d863 | 523 | max = usb_endpoint_maxp(desc); |
1da177e4 LT |
524 | |
525 | /* drivers must not request bad settings, since lower levels | |
526 | * (hardware or its drivers) may not check. some endpoints | |
527 | * can't do iso, many have maxpacket limitations, etc. | |
528 | * | |
529 | * since this "hardware" driver is here to help debugging, we | |
530 | * have some extra sanity checks. (there could be more though, | |
531 | * especially for "ep9out" style fixed function ones.) | |
532 | */ | |
533 | retval = -EINVAL; | |
59f08e6d | 534 | switch (usb_endpoint_type(desc)) { |
1da177e4 | 535 | case USB_ENDPOINT_XFER_BULK: |
18f2cbaa SAS |
536 | if (strstr(ep->ep.name, "-iso") |
537 | || strstr(ep->ep.name, "-int")) { | |
1da177e4 LT |
538 | goto done; |
539 | } | |
540 | switch (dum->gadget.speed) { | |
1cd8fd28 TB |
541 | case USB_SPEED_SUPER: |
542 | if (max == 1024) | |
543 | break; | |
544 | goto done; | |
1da177e4 LT |
545 | case USB_SPEED_HIGH: |
546 | if (max == 512) | |
547 | break; | |
9063ff44 IL |
548 | goto done; |
549 | case USB_SPEED_FULL: | |
550 | if (max == 8 || max == 16 || max == 32 || max == 64) | |
1da177e4 LT |
551 | /* we'll fake any legal size */ |
552 | break; | |
9063ff44 IL |
553 | /* save a return statement */ |
554 | default: | |
555 | goto done; | |
1da177e4 LT |
556 | } |
557 | break; | |
558 | case USB_ENDPOINT_XFER_INT: | |
18f2cbaa | 559 | if (strstr(ep->ep.name, "-iso")) /* bulk is ok */ |
1da177e4 LT |
560 | goto done; |
561 | /* real hardware might not handle all packet sizes */ | |
562 | switch (dum->gadget.speed) { | |
1cd8fd28 | 563 | case USB_SPEED_SUPER: |
1da177e4 LT |
564 | case USB_SPEED_HIGH: |
565 | if (max <= 1024) | |
566 | break; | |
567 | /* save a return statement */ | |
f93de0c2 | 568 | /* fall through */ |
1da177e4 LT |
569 | case USB_SPEED_FULL: |
570 | if (max <= 64) | |
571 | break; | |
572 | /* save a return statement */ | |
f93de0c2 | 573 | /* fall through */ |
1da177e4 LT |
574 | default: |
575 | if (max <= 8) | |
576 | break; | |
577 | goto done; | |
578 | } | |
579 | break; | |
580 | case USB_ENDPOINT_XFER_ISOC: | |
18f2cbaa SAS |
581 | if (strstr(ep->ep.name, "-bulk") |
582 | || strstr(ep->ep.name, "-int")) | |
1da177e4 LT |
583 | goto done; |
584 | /* real hardware might not handle all packet sizes */ | |
585 | switch (dum->gadget.speed) { | |
1cd8fd28 | 586 | case USB_SPEED_SUPER: |
1da177e4 LT |
587 | case USB_SPEED_HIGH: |
588 | if (max <= 1024) | |
589 | break; | |
590 | /* save a return statement */ | |
f93de0c2 | 591 | /* fall through */ |
1da177e4 LT |
592 | case USB_SPEED_FULL: |
593 | if (max <= 1023) | |
594 | break; | |
595 | /* save a return statement */ | |
596 | default: | |
597 | goto done; | |
598 | } | |
599 | break; | |
600 | default: | |
601 | /* few chips support control except on ep0 */ | |
602 | goto done; | |
603 | } | |
604 | ||
605 | _ep->maxpacket = max; | |
a54c979f SAS |
606 | if (usb_ss_max_streams(_ep->comp_desc)) { |
607 | if (!usb_endpoint_xfer_bulk(desc)) { | |
608 | dev_err(udc_dev(dum), "Can't enable stream support on " | |
609 | "non-bulk ep %s\n", _ep->name); | |
610 | return -EINVAL; | |
611 | } | |
612 | ep->stream_en = 1; | |
613 | } | |
3cf0ad02 | 614 | ep->desc = desc; |
1da177e4 | 615 | |
a54c979f | 616 | dev_dbg(udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d stream %s\n", |
1da177e4 LT |
617 | _ep->name, |
618 | desc->bEndpointAddress & 0x0f, | |
619 | (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out", | |
620 | ({ char *val; | |
59f08e6d | 621 | switch (usb_endpoint_type(desc)) { |
7c884fe4 TB |
622 | case USB_ENDPOINT_XFER_BULK: |
623 | val = "bulk"; | |
624 | break; | |
625 | case USB_ENDPOINT_XFER_ISOC: | |
626 | val = "iso"; | |
627 | break; | |
628 | case USB_ENDPOINT_XFER_INT: | |
629 | val = "intr"; | |
630 | break; | |
631 | default: | |
632 | val = "ctrl"; | |
633 | break; | |
2b84f92b | 634 | } val; }), |
a54c979f | 635 | max, ep->stream_en ? "enabled" : "disabled"); |
1da177e4 LT |
636 | |
637 | /* at this point real hardware should be NAKing transfers | |
638 | * to that endpoint, until a buffer is queued to it. | |
639 | */ | |
851a526d | 640 | ep->halted = ep->wedged = 0; |
1da177e4 LT |
641 | retval = 0; |
642 | done: | |
643 | return retval; | |
644 | } | |
645 | ||
18f2cbaa | 646 | static int dummy_disable(struct usb_ep *_ep) |
1da177e4 LT |
647 | { |
648 | struct dummy_ep *ep; | |
649 | struct dummy *dum; | |
650 | unsigned long flags; | |
1da177e4 | 651 | |
18f2cbaa | 652 | ep = usb_ep_to_dummy_ep(_ep); |
1da177e4 LT |
653 | if (!_ep || !ep->desc || _ep->name == ep0name) |
654 | return -EINVAL; | |
18f2cbaa | 655 | dum = ep_to_dummy(ep); |
1da177e4 | 656 | |
18f2cbaa | 657 | spin_lock_irqsave(&dum->lock, flags); |
1da177e4 | 658 | ep->desc = NULL; |
a54c979f | 659 | ep->stream_en = 0; |
18f2cbaa SAS |
660 | nuke(dum, ep); |
661 | spin_unlock_irqrestore(&dum->lock, flags); | |
1da177e4 | 662 | |
18f2cbaa | 663 | dev_dbg(udc_dev(dum), "disabled %s\n", _ep->name); |
849b1333 | 664 | return 0; |
1da177e4 LT |
665 | } |
666 | ||
18f2cbaa SAS |
667 | static struct usb_request *dummy_alloc_request(struct usb_ep *_ep, |
668 | gfp_t mem_flags) | |
1da177e4 | 669 | { |
1da177e4 LT |
670 | struct dummy_request *req; |
671 | ||
672 | if (!_ep) | |
673 | return NULL; | |
1da177e4 | 674 | |
7039f422 | 675 | req = kzalloc(sizeof(*req), mem_flags); |
1da177e4 LT |
676 | if (!req) |
677 | return NULL; | |
18f2cbaa | 678 | INIT_LIST_HEAD(&req->queue); |
1da177e4 LT |
679 | return &req->req; |
680 | } | |
681 | ||
18f2cbaa | 682 | static void dummy_free_request(struct usb_ep *_ep, struct usb_request *_req) |
1da177e4 | 683 | { |
1da177e4 LT |
684 | struct dummy_request *req; |
685 | ||
f99987bb | 686 | if (!_ep || !_req) { |
72688dc9 | 687 | WARN_ON(1); |
1da177e4 | 688 | return; |
f99987bb | 689 | } |
1da177e4 | 690 | |
18f2cbaa SAS |
691 | req = usb_request_to_dummy_request(_req); |
692 | WARN_ON(!list_empty(&req->queue)); | |
693 | kfree(req); | |
1da177e4 LT |
694 | } |
695 | ||
18f2cbaa | 696 | static void fifo_complete(struct usb_ep *ep, struct usb_request *req) |
1da177e4 LT |
697 | { |
698 | } | |
699 | ||
18f2cbaa | 700 | static int dummy_queue(struct usb_ep *_ep, struct usb_request *_req, |
55016f10 | 701 | gfp_t mem_flags) |
1da177e4 LT |
702 | { |
703 | struct dummy_ep *ep; | |
704 | struct dummy_request *req; | |
705 | struct dummy *dum; | |
cdfcbd2c | 706 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
707 | unsigned long flags; |
708 | ||
18f2cbaa SAS |
709 | req = usb_request_to_dummy_request(_req); |
710 | if (!_req || !list_empty(&req->queue) || !_req->complete) | |
1da177e4 LT |
711 | return -EINVAL; |
712 | ||
18f2cbaa | 713 | ep = usb_ep_to_dummy_ep(_ep); |
1da177e4 LT |
714 | if (!_ep || (!ep->desc && _ep->name != ep0name)) |
715 | return -EINVAL; | |
716 | ||
18f2cbaa | 717 | dum = ep_to_dummy(ep); |
719e52cb | 718 | dum_hcd = gadget_to_dummy_hcd(&dum->gadget); |
cdfcbd2c | 719 | if (!dum->driver || !is_enabled(dum_hcd)) |
1da177e4 LT |
720 | return -ESHUTDOWN; |
721 | ||
722 | #if 0 | |
18f2cbaa | 723 | dev_dbg(udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n", |
1da177e4 LT |
724 | ep, _req, _ep->name, _req->length, _req->buf); |
725 | #endif | |
1da177e4 LT |
726 | _req->status = -EINPROGRESS; |
727 | _req->actual = 0; | |
18f2cbaa | 728 | spin_lock_irqsave(&dum->lock, flags); |
1da177e4 LT |
729 | |
730 | /* implement an emulated single-request FIFO */ | |
731 | if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && | |
18f2cbaa SAS |
732 | list_empty(&dum->fifo_req.queue) && |
733 | list_empty(&ep->queue) && | |
1da177e4 LT |
734 | _req->length <= FIFO_SIZE) { |
735 | req = &dum->fifo_req; | |
736 | req->req = *_req; | |
737 | req->req.buf = dum->fifo_buf; | |
18f2cbaa | 738 | memcpy(dum->fifo_buf, _req->buf, _req->length); |
1da177e4 LT |
739 | req->req.context = dum; |
740 | req->req.complete = fifo_complete; | |
741 | ||
c728df70 | 742 | list_add_tail(&req->queue, &ep->queue); |
18f2cbaa | 743 | spin_unlock(&dum->lock); |
1da177e4 LT |
744 | _req->actual = _req->length; |
745 | _req->status = 0; | |
304f7e5e | 746 | usb_gadget_giveback_request(_ep, _req); |
18f2cbaa | 747 | spin_lock(&dum->lock); |
c728df70 DB |
748 | } else |
749 | list_add_tail(&req->queue, &ep->queue); | |
18f2cbaa | 750 | spin_unlock_irqrestore(&dum->lock, flags); |
1da177e4 LT |
751 | |
752 | /* real hardware would likely enable transfers here, in case | |
753 | * it'd been left NAKing. | |
754 | */ | |
755 | return 0; | |
756 | } | |
757 | ||
18f2cbaa | 758 | static int dummy_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
1da177e4 LT |
759 | { |
760 | struct dummy_ep *ep; | |
761 | struct dummy *dum; | |
762 | int retval = -EINVAL; | |
763 | unsigned long flags; | |
764 | struct dummy_request *req = NULL; | |
765 | ||
766 | if (!_ep || !_req) | |
767 | return retval; | |
18f2cbaa SAS |
768 | ep = usb_ep_to_dummy_ep(_ep); |
769 | dum = ep_to_dummy(ep); | |
1da177e4 LT |
770 | |
771 | if (!dum->driver) | |
772 | return -ESHUTDOWN; | |
773 | ||
18f2cbaa SAS |
774 | local_irq_save(flags); |
775 | spin_lock(&dum->lock); | |
776 | list_for_each_entry(req, &ep->queue, queue) { | |
1da177e4 | 777 | if (&req->req == _req) { |
18f2cbaa | 778 | list_del_init(&req->queue); |
1da177e4 LT |
779 | _req->status = -ECONNRESET; |
780 | retval = 0; | |
781 | break; | |
782 | } | |
783 | } | |
18f2cbaa | 784 | spin_unlock(&dum->lock); |
1da177e4 LT |
785 | |
786 | if (retval == 0) { | |
18f2cbaa | 787 | dev_dbg(udc_dev(dum), |
1da177e4 LT |
788 | "dequeued req %p from %s, len %d buf %p\n", |
789 | req, _ep->name, _req->length, _req->buf); | |
304f7e5e | 790 | usb_gadget_giveback_request(_ep, _req); |
1da177e4 | 791 | } |
18f2cbaa | 792 | local_irq_restore(flags); |
1da177e4 LT |
793 | return retval; |
794 | } | |
795 | ||
796 | static int | |
851a526d | 797 | dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) |
1da177e4 LT |
798 | { |
799 | struct dummy_ep *ep; | |
800 | struct dummy *dum; | |
801 | ||
802 | if (!_ep) | |
803 | return -EINVAL; | |
18f2cbaa SAS |
804 | ep = usb_ep_to_dummy_ep(_ep); |
805 | dum = ep_to_dummy(ep); | |
1da177e4 LT |
806 | if (!dum->driver) |
807 | return -ESHUTDOWN; | |
808 | if (!value) | |
851a526d | 809 | ep->halted = ep->wedged = 0; |
1da177e4 | 810 | else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && |
18f2cbaa | 811 | !list_empty(&ep->queue)) |
1da177e4 | 812 | return -EAGAIN; |
851a526d | 813 | else { |
1da177e4 | 814 | ep->halted = 1; |
851a526d AS |
815 | if (wedged) |
816 | ep->wedged = 1; | |
817 | } | |
1da177e4 LT |
818 | /* FIXME clear emulated data toggle too */ |
819 | return 0; | |
820 | } | |
821 | ||
851a526d AS |
822 | static int |
823 | dummy_set_halt(struct usb_ep *_ep, int value) | |
824 | { | |
825 | return dummy_set_halt_and_wedge(_ep, value, 0); | |
826 | } | |
827 | ||
828 | static int dummy_set_wedge(struct usb_ep *_ep) | |
829 | { | |
830 | if (!_ep || _ep->name == ep0name) | |
831 | return -EINVAL; | |
832 | return dummy_set_halt_and_wedge(_ep, 1, 1); | |
833 | } | |
834 | ||
1da177e4 LT |
835 | static const struct usb_ep_ops dummy_ep_ops = { |
836 | .enable = dummy_enable, | |
837 | .disable = dummy_disable, | |
838 | ||
839 | .alloc_request = dummy_alloc_request, | |
840 | .free_request = dummy_free_request, | |
841 | ||
1da177e4 LT |
842 | .queue = dummy_queue, |
843 | .dequeue = dummy_dequeue, | |
844 | ||
845 | .set_halt = dummy_set_halt, | |
851a526d | 846 | .set_wedge = dummy_set_wedge, |
1da177e4 LT |
847 | }; |
848 | ||
849 | /*-------------------------------------------------------------------------*/ | |
850 | ||
851 | /* there are both host and device side versions of this call ... */ | |
18f2cbaa | 852 | static int dummy_g_get_frame(struct usb_gadget *_gadget) |
1da177e4 | 853 | { |
04c4d8d4 | 854 | struct timespec64 ts64; |
1da177e4 | 855 | |
04c4d8d4 WP |
856 | ktime_get_ts64(&ts64); |
857 | return ts64.tv_nsec / NSEC_PER_MSEC; | |
1da177e4 LT |
858 | } |
859 | ||
18f2cbaa | 860 | static int dummy_wakeup(struct usb_gadget *_gadget) |
1da177e4 | 861 | { |
cdfcbd2c | 862 | struct dummy_hcd *dum_hcd; |
1da177e4 | 863 | |
cdfcbd2c TB |
864 | dum_hcd = gadget_to_dummy_hcd(_gadget); |
865 | if (!(dum_hcd->dum->devstatus & ((1 << USB_DEVICE_B_HNP_ENABLE) | |
5742b0c9 | 866 | | (1 << USB_DEVICE_REMOTE_WAKEUP)))) |
1da177e4 | 867 | return -EINVAL; |
cdfcbd2c | 868 | if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0) |
391eca9d | 869 | return -ENOLINK; |
cdfcbd2c TB |
870 | if ((dum_hcd->port_status & USB_PORT_STAT_SUSPEND) == 0 && |
871 | dum_hcd->rh_state != DUMMY_RH_SUSPENDED) | |
391eca9d AS |
872 | return -EIO; |
873 | ||
874 | /* FIXME: What if the root hub is suspended but the port isn't? */ | |
1da177e4 LT |
875 | |
876 | /* hub notices our request, issues downstream resume, etc */ | |
cdfcbd2c TB |
877 | dum_hcd->resuming = 1; |
878 | dum_hcd->re_timeout = jiffies + msecs_to_jiffies(20); | |
879 | mod_timer(&dummy_hcd_to_hcd(dum_hcd)->rh_timer, dum_hcd->re_timeout); | |
1da177e4 LT |
880 | return 0; |
881 | } | |
882 | ||
18f2cbaa | 883 | static int dummy_set_selfpowered(struct usb_gadget *_gadget, int value) |
1da177e4 LT |
884 | { |
885 | struct dummy *dum; | |
886 | ||
5d9cb6af | 887 | _gadget->is_selfpowered = (value != 0); |
18f2cbaa | 888 | dum = gadget_to_dummy_hcd(_gadget)->dum; |
1da177e4 LT |
889 | if (value) |
890 | dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED); | |
891 | else | |
892 | dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); | |
893 | return 0; | |
894 | } | |
895 | ||
d262127c | 896 | static void dummy_udc_update_ep0(struct dummy *dum) |
b5738413 | 897 | { |
c6884191 | 898 | if (dum->gadget.speed == USB_SPEED_SUPER) |
b5738413 | 899 | dum->ep[0].ep.maxpacket = 9; |
c6884191 | 900 | else |
b5738413 | 901 | dum->ep[0].ep.maxpacket = 64; |
b5738413 SAS |
902 | } |
903 | ||
18f2cbaa | 904 | static int dummy_pullup(struct usb_gadget *_gadget, int value) |
f1c39fad | 905 | { |
d8a14a85 | 906 | struct dummy_hcd *dum_hcd; |
f1c39fad AS |
907 | struct dummy *dum; |
908 | unsigned long flags; | |
909 | ||
b5738413 | 910 | dum = gadget_dev_to_dummy(&_gadget->dev); |
d8a14a85 | 911 | dum_hcd = gadget_to_dummy_hcd(_gadget); |
d8a14a85 | 912 | |
18f2cbaa | 913 | spin_lock_irqsave(&dum->lock, flags); |
f1c39fad | 914 | dum->pullup = (value != 0); |
d8a14a85 | 915 | set_link_state(dum_hcd); |
18f2cbaa | 916 | spin_unlock_irqrestore(&dum->lock, flags); |
b5738413 | 917 | |
d8a14a85 | 918 | usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd)); |
f1c39fad AS |
919 | return 0; |
920 | } | |
921 | ||
06644aaf FB |
922 | static void dummy_udc_set_speed(struct usb_gadget *_gadget, |
923 | enum usb_device_speed speed) | |
924 | { | |
925 | struct dummy *dum; | |
926 | ||
927 | dum = gadget_dev_to_dummy(&_gadget->dev); | |
d855e08c | 928 | dum->gadget.speed = speed; |
06644aaf | 929 | dummy_udc_update_ep0(dum); |
06644aaf FB |
930 | } |
931 | ||
aa074739 SAS |
932 | static int dummy_udc_start(struct usb_gadget *g, |
933 | struct usb_gadget_driver *driver); | |
22835b80 | 934 | static int dummy_udc_stop(struct usb_gadget *g); |
0f91349b | 935 | |
1da177e4 LT |
936 | static const struct usb_gadget_ops dummy_ops = { |
937 | .get_frame = dummy_g_get_frame, | |
938 | .wakeup = dummy_wakeup, | |
939 | .set_selfpowered = dummy_set_selfpowered, | |
f1c39fad | 940 | .pullup = dummy_pullup, |
aa074739 SAS |
941 | .udc_start = dummy_udc_start, |
942 | .udc_stop = dummy_udc_stop, | |
06644aaf | 943 | .udc_set_speed = dummy_udc_set_speed, |
1da177e4 LT |
944 | }; |
945 | ||
946 | /*-------------------------------------------------------------------------*/ | |
947 | ||
948 | /* "function" sysfs attribute */ | |
ce26bd23 | 949 | static ssize_t function_show(struct device *dev, struct device_attribute *attr, |
18f2cbaa | 950 | char *buf) |
1da177e4 | 951 | { |
18f2cbaa | 952 | struct dummy *dum = gadget_dev_to_dummy(dev); |
1da177e4 LT |
953 | |
954 | if (!dum->driver || !dum->driver->function) | |
955 | return 0; | |
18f2cbaa | 956 | return scnprintf(buf, PAGE_SIZE, "%s\n", dum->driver->function); |
1da177e4 | 957 | } |
ce26bd23 | 958 | static DEVICE_ATTR_RO(function); |
1da177e4 LT |
959 | |
960 | /*-------------------------------------------------------------------------*/ | |
961 | ||
962 | /* | |
963 | * Driver registration/unregistration. | |
964 | * | |
965 | * This is basically hardware-specific; there's usually only one real USB | |
966 | * device (not host) controller since that's how USB devices are intended | |
967 | * to work. So most implementations of these api calls will rely on the | |
968 | * fact that only one driver will ever bind to the hardware. But curious | |
969 | * hardware can be built with discrete components, so the gadget API doesn't | |
970 | * require that assumption. | |
971 | * | |
972 | * For this emulator, it might be convenient to create a usb slave device | |
973 | * for each driver that registers: just add to a big root hub. | |
974 | */ | |
975 | ||
aa074739 SAS |
976 | static int dummy_udc_start(struct usb_gadget *g, |
977 | struct usb_gadget_driver *driver) | |
1da177e4 | 978 | { |
aa074739 SAS |
979 | struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g); |
980 | struct dummy *dum = dum_hcd->dum; | |
1da177e4 | 981 | |
7177aed4 | 982 | if (driver->max_speed == USB_SPEED_UNKNOWN) |
1da177e4 LT |
983 | return -EINVAL; |
984 | ||
985 | /* | |
986 | * SLAVE side init ... the layer above hardware, which | |
987 | * can't enumerate without help from the driver we're binding. | |
988 | */ | |
5742b0c9 | 989 | |
7dbd8f4c | 990 | spin_lock_irq(&dum->lock); |
1da177e4 | 991 | dum->devstatus = 0; |
1da177e4 | 992 | dum->driver = driver; |
7dbd8f4c AS |
993 | dum->ints_enabled = 1; |
994 | spin_unlock_irq(&dum->lock); | |
dd7e6dd5 | 995 | |
1da177e4 LT |
996 | return 0; |
997 | } | |
1da177e4 | 998 | |
22835b80 | 999 | static int dummy_udc_stop(struct usb_gadget *g) |
1da177e4 | 1000 | { |
aa074739 SAS |
1001 | struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g); |
1002 | struct dummy *dum = dum_hcd->dum; | |
1da177e4 | 1003 | |
f16443a0 | 1004 | spin_lock_irq(&dum->lock); |
7dbd8f4c AS |
1005 | dum->ints_enabled = 0; |
1006 | stop_activity(dum); | |
1007 | ||
1008 | /* emulate synchronize_irq(): wait for callbacks to finish */ | |
1009 | while (dum->callback_usage > 0) { | |
1010 | spin_unlock_irq(&dum->lock); | |
1011 | usleep_range(1000, 2000); | |
1012 | spin_lock_irq(&dum->lock); | |
1013 | } | |
1014 | ||
1da177e4 | 1015 | dum->driver = NULL; |
f16443a0 | 1016 | spin_unlock_irq(&dum->lock); |
25427874 | 1017 | |
1da177e4 LT |
1018 | return 0; |
1019 | } | |
1da177e4 LT |
1020 | |
1021 | #undef is_enabled | |
1022 | ||
d9b76251 AS |
1023 | /* The gadget structure is stored inside the hcd structure and will be |
1024 | * released along with it. */ | |
0fb57599 SAS |
1025 | static void init_dummy_udc_hw(struct dummy *dum) |
1026 | { | |
1027 | int i; | |
1028 | ||
1029 | INIT_LIST_HEAD(&dum->gadget.ep_list); | |
1030 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
1031 | struct dummy_ep *ep = &dum->ep[i]; | |
1032 | ||
7a3b8e70 | 1033 | if (!ep_info[i].name) |
0fb57599 | 1034 | break; |
7a3b8e70 RB |
1035 | ep->ep.name = ep_info[i].name; |
1036 | ep->ep.caps = ep_info[i].caps; | |
0fb57599 SAS |
1037 | ep->ep.ops = &dummy_ep_ops; |
1038 | list_add_tail(&ep->ep.ep_list, &dum->gadget.ep_list); | |
1039 | ep->halted = ep->wedged = ep->already_seen = | |
1040 | ep->setup_stage = 0; | |
e117e742 | 1041 | usb_ep_set_maxpacket_limit(&ep->ep, ~0); |
c6884191 | 1042 | ep->ep.max_streams = 16; |
0fb57599 SAS |
1043 | ep->last_io = jiffies; |
1044 | ep->gadget = &dum->gadget; | |
1045 | ep->desc = NULL; | |
1046 | INIT_LIST_HEAD(&ep->queue); | |
1047 | } | |
1048 | ||
1049 | dum->gadget.ep0 = &dum->ep[0].ep; | |
1050 | list_del_init(&dum->ep[0].ep.ep_list); | |
1051 | INIT_LIST_HEAD(&dum->fifo_req.queue); | |
f8744d40 SAS |
1052 | |
1053 | #ifdef CONFIG_USB_OTG | |
1054 | dum->gadget.is_otg = 1; | |
1055 | #endif | |
0fb57599 SAS |
1056 | } |
1057 | ||
18f2cbaa | 1058 | static int dummy_udc_probe(struct platform_device *pdev) |
d9b76251 | 1059 | { |
b100a2f3 | 1060 | struct dummy *dum; |
d9b76251 AS |
1061 | int rc; |
1062 | ||
b100a2f3 | 1063 | dum = *((void **)dev_get_platdata(&pdev->dev)); |
5bbc8526 PC |
1064 | /* Clear usb_gadget region for new registration to udc-core */ |
1065 | memzero_explicit(&dum->gadget, sizeof(struct usb_gadget)); | |
d9b76251 AS |
1066 | dum->gadget.name = gadget_name; |
1067 | dum->gadget.ops = &dummy_ops; | |
fe659bcc AS |
1068 | if (mod_data.is_super_speed) |
1069 | dum->gadget.max_speed = USB_SPEED_SUPER; | |
1070 | else if (mod_data.is_high_speed) | |
1071 | dum->gadget.max_speed = USB_SPEED_HIGH; | |
1072 | else | |
1073 | dum->gadget.max_speed = USB_SPEED_FULL; | |
d9b76251 | 1074 | |
8364d6b0 | 1075 | dum->gadget.dev.parent = &pdev->dev; |
0fb57599 SAS |
1076 | init_dummy_udc_hw(dum); |
1077 | ||
0f91349b SAS |
1078 | rc = usb_add_gadget_udc(&pdev->dev, &dum->gadget); |
1079 | if (rc < 0) | |
1080 | goto err_udc; | |
1081 | ||
18f2cbaa | 1082 | rc = device_create_file(&dum->gadget.dev, &dev_attr_function); |
efd54a36 | 1083 | if (rc < 0) |
0f91349b SAS |
1084 | goto err_dev; |
1085 | platform_set_drvdata(pdev, dum); | |
1086 | return rc; | |
1087 | ||
1088 | err_dev: | |
1089 | usb_del_gadget_udc(&dum->gadget); | |
1090 | err_udc: | |
d9b76251 AS |
1091 | return rc; |
1092 | } | |
1093 | ||
18f2cbaa | 1094 | static int dummy_udc_remove(struct platform_device *pdev) |
d9b76251 | 1095 | { |
18f2cbaa | 1096 | struct dummy *dum = platform_get_drvdata(pdev); |
d9b76251 | 1097 | |
18f2cbaa | 1098 | device_remove_file(&dum->gadget.dev, &dev_attr_function); |
5f5610f6 | 1099 | usb_del_gadget_udc(&dum->gadget); |
d9b76251 AS |
1100 | return 0; |
1101 | } | |
1102 | ||
fc0b721f SAS |
1103 | static void dummy_udc_pm(struct dummy *dum, struct dummy_hcd *dum_hcd, |
1104 | int suspend) | |
391eca9d | 1105 | { |
fc0b721f SAS |
1106 | spin_lock_irq(&dum->lock); |
1107 | dum->udc_suspended = suspend; | |
d8a14a85 | 1108 | set_link_state(dum_hcd); |
fc0b721f SAS |
1109 | spin_unlock_irq(&dum->lock); |
1110 | } | |
1111 | ||
1112 | static int dummy_udc_suspend(struct platform_device *pdev, pm_message_t state) | |
1113 | { | |
1114 | struct dummy *dum = platform_get_drvdata(pdev); | |
1115 | struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget); | |
391eca9d | 1116 | |
fc0b721f SAS |
1117 | dev_dbg(&pdev->dev, "%s\n", __func__); |
1118 | dummy_udc_pm(dum, dum_hcd, 1); | |
d8a14a85 | 1119 | usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd)); |
391eca9d AS |
1120 | return 0; |
1121 | } | |
1122 | ||
fc0b721f | 1123 | static int dummy_udc_resume(struct platform_device *pdev) |
391eca9d | 1124 | { |
fc0b721f SAS |
1125 | struct dummy *dum = platform_get_drvdata(pdev); |
1126 | struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget); | |
391eca9d | 1127 | |
fc0b721f SAS |
1128 | dev_dbg(&pdev->dev, "%s\n", __func__); |
1129 | dummy_udc_pm(dum, dum_hcd, 0); | |
d8a14a85 | 1130 | usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd)); |
391eca9d AS |
1131 | return 0; |
1132 | } | |
1133 | ||
3ae5eaec | 1134 | static struct platform_driver dummy_udc_driver = { |
d9b76251 AS |
1135 | .probe = dummy_udc_probe, |
1136 | .remove = dummy_udc_remove, | |
391eca9d AS |
1137 | .suspend = dummy_udc_suspend, |
1138 | .resume = dummy_udc_resume, | |
3ae5eaec RK |
1139 | .driver = { |
1140 | .name = (char *) gadget_name, | |
3ae5eaec | 1141 | }, |
d9b76251 AS |
1142 | }; |
1143 | ||
1da177e4 LT |
1144 | /*-------------------------------------------------------------------------*/ |
1145 | ||
a54c979f SAS |
1146 | static unsigned int dummy_get_ep_idx(const struct usb_endpoint_descriptor *desc) |
1147 | { | |
1148 | unsigned int index; | |
1149 | ||
1150 | index = usb_endpoint_num(desc) << 1; | |
1151 | if (usb_endpoint_dir_in(desc)) | |
1152 | index |= 1; | |
1153 | return index; | |
1154 | } | |
1155 | ||
1da177e4 LT |
1156 | /* MASTER/HOST SIDE DRIVER |
1157 | * | |
1158 | * this uses the hcd framework to hook up to host side drivers. | |
1159 | * its root hub will only have one device, otherwise it acts like | |
1160 | * a normal host controller. | |
1161 | * | |
1162 | * when urbs are queued, they're just stuck on a list that we | |
1163 | * scan in a timer callback. that callback connects writes from | |
1164 | * the host with reads from the device, and so on, based on the | |
1165 | * usb 2.0 rules. | |
1166 | */ | |
1167 | ||
a54c979f SAS |
1168 | static int dummy_ep_stream_en(struct dummy_hcd *dum_hcd, struct urb *urb) |
1169 | { | |
1170 | const struct usb_endpoint_descriptor *desc = &urb->ep->desc; | |
1171 | u32 index; | |
1172 | ||
1173 | if (!usb_endpoint_xfer_bulk(desc)) | |
1174 | return 0; | |
1175 | ||
1176 | index = dummy_get_ep_idx(desc); | |
1177 | return (1 << index) & dum_hcd->stream_en_ep; | |
1178 | } | |
1179 | ||
1180 | /* | |
1181 | * The max stream number is saved as a nibble so for the 30 possible endpoints | |
1182 | * we only 15 bytes of memory. Therefore we are limited to max 16 streams (0 | |
1183 | * means we use only 1 stream). The maximum according to the spec is 16bit so | |
1184 | * if the 16 stream limit is about to go, the array size should be incremented | |
1185 | * to 30 elements of type u16. | |
1186 | */ | |
1187 | static int get_max_streams_for_pipe(struct dummy_hcd *dum_hcd, | |
1188 | unsigned int pipe) | |
1189 | { | |
1190 | int max_streams; | |
1191 | ||
1192 | max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)]; | |
1193 | if (usb_pipeout(pipe)) | |
1194 | max_streams >>= 4; | |
1195 | else | |
1196 | max_streams &= 0xf; | |
1197 | max_streams++; | |
1198 | return max_streams; | |
1199 | } | |
1200 | ||
1201 | static void set_max_streams_for_pipe(struct dummy_hcd *dum_hcd, | |
1202 | unsigned int pipe, unsigned int streams) | |
1203 | { | |
1204 | int max_streams; | |
1205 | ||
1206 | streams--; | |
1207 | max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)]; | |
1208 | if (usb_pipeout(pipe)) { | |
1209 | streams <<= 4; | |
1210 | max_streams &= 0xf; | |
1211 | } else { | |
1212 | max_streams &= 0xf0; | |
1213 | } | |
1214 | max_streams |= streams; | |
1215 | dum_hcd->num_stream[usb_pipeendpoint(pipe)] = max_streams; | |
1216 | } | |
1217 | ||
1218 | static int dummy_validate_stream(struct dummy_hcd *dum_hcd, struct urb *urb) | |
1219 | { | |
1220 | unsigned int max_streams; | |
1221 | int enabled; | |
1222 | ||
1223 | enabled = dummy_ep_stream_en(dum_hcd, urb); | |
1224 | if (!urb->stream_id) { | |
1225 | if (enabled) | |
1226 | return -EINVAL; | |
1227 | return 0; | |
1228 | } | |
1229 | if (!enabled) | |
1230 | return -EINVAL; | |
1231 | ||
1232 | max_streams = get_max_streams_for_pipe(dum_hcd, | |
1233 | usb_pipeendpoint(urb->pipe)); | |
1234 | if (urb->stream_id > max_streams) { | |
1235 | dev_err(dummy_dev(dum_hcd), "Stream id %d is out of range.\n", | |
1236 | urb->stream_id); | |
1237 | BUG(); | |
1238 | return -EINVAL; | |
1239 | } | |
1240 | return 0; | |
1241 | } | |
1242 | ||
18f2cbaa | 1243 | static int dummy_urb_enqueue( |
1da177e4 | 1244 | struct usb_hcd *hcd, |
1da177e4 | 1245 | struct urb *urb, |
55016f10 | 1246 | gfp_t mem_flags |
1da177e4 | 1247 | ) { |
cdfcbd2c | 1248 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
1249 | struct urbp *urbp; |
1250 | unsigned long flags; | |
e9df41c5 | 1251 | int rc; |
1da177e4 | 1252 | |
18f2cbaa | 1253 | urbp = kmalloc(sizeof *urbp, mem_flags); |
1da177e4 LT |
1254 | if (!urbp) |
1255 | return -ENOMEM; | |
1256 | urbp->urb = urb; | |
14fce33a | 1257 | urbp->miter_started = 0; |
1da177e4 | 1258 | |
cdfcbd2c TB |
1259 | dum_hcd = hcd_to_dummy_hcd(hcd); |
1260 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
a54c979f SAS |
1261 | |
1262 | rc = dummy_validate_stream(dum_hcd, urb); | |
1263 | if (rc) { | |
1264 | kfree(urbp); | |
1265 | goto done; | |
1266 | } | |
1267 | ||
e9df41c5 AS |
1268 | rc = usb_hcd_link_urb_to_ep(hcd, urb); |
1269 | if (rc) { | |
1270 | kfree(urbp); | |
1271 | goto done; | |
1272 | } | |
1da177e4 | 1273 | |
cdfcbd2c TB |
1274 | if (!dum_hcd->udev) { |
1275 | dum_hcd->udev = urb->dev; | |
1276 | usb_get_dev(dum_hcd->udev); | |
1277 | } else if (unlikely(dum_hcd->udev != urb->dev)) | |
1278 | dev_err(dummy_dev(dum_hcd), "usb_device address has changed!\n"); | |
1da177e4 | 1279 | |
cdfcbd2c | 1280 | list_add_tail(&urbp->urbp_list, &dum_hcd->urbp_list); |
1da177e4 | 1281 | urb->hcpriv = urbp; |
0173a68b AS |
1282 | if (!dum_hcd->next_frame_urbp) |
1283 | dum_hcd->next_frame_urbp = urbp; | |
18f2cbaa | 1284 | if (usb_pipetype(urb->pipe) == PIPE_CONTROL) |
1da177e4 LT |
1285 | urb->error_count = 1; /* mark as a new urb */ |
1286 | ||
1287 | /* kick the scheduler, it'll do the rest */ | |
cdfcbd2c TB |
1288 | if (!timer_pending(&dum_hcd->timer)) |
1289 | mod_timer(&dum_hcd->timer, jiffies + 1); | |
1da177e4 | 1290 | |
e9df41c5 | 1291 | done: |
cdfcbd2c | 1292 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
e9df41c5 | 1293 | return rc; |
1da177e4 LT |
1294 | } |
1295 | ||
e9df41c5 | 1296 | static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 | 1297 | { |
cdfcbd2c | 1298 | struct dummy_hcd *dum_hcd; |
391eca9d | 1299 | unsigned long flags; |
e9df41c5 | 1300 | int rc; |
391eca9d AS |
1301 | |
1302 | /* giveback happens automatically in timer callback, | |
1303 | * so make sure the callback happens */ | |
cdfcbd2c TB |
1304 | dum_hcd = hcd_to_dummy_hcd(hcd); |
1305 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
e9df41c5 AS |
1306 | |
1307 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); | |
cdfcbd2c TB |
1308 | if (!rc && dum_hcd->rh_state != DUMMY_RH_RUNNING && |
1309 | !list_empty(&dum_hcd->urbp_list)) | |
1310 | mod_timer(&dum_hcd->timer, jiffies); | |
e9df41c5 | 1311 | |
cdfcbd2c | 1312 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
e9df41c5 | 1313 | return rc; |
1da177e4 LT |
1314 | } |
1315 | ||
a04ce20d SAS |
1316 | static int dummy_perform_transfer(struct urb *urb, struct dummy_request *req, |
1317 | u32 len) | |
1318 | { | |
1319 | void *ubuf, *rbuf; | |
14fce33a | 1320 | struct urbp *urbp = urb->hcpriv; |
a04ce20d | 1321 | int to_host; |
14fce33a SAS |
1322 | struct sg_mapping_iter *miter = &urbp->miter; |
1323 | u32 trans = 0; | |
1324 | u32 this_sg; | |
1325 | bool next_sg; | |
a04ce20d SAS |
1326 | |
1327 | to_host = usb_pipein(urb->pipe); | |
1328 | rbuf = req->req.buf + req->req.actual; | |
a04ce20d | 1329 | |
14fce33a SAS |
1330 | if (!urb->num_sgs) { |
1331 | ubuf = urb->transfer_buffer + urb->actual_length; | |
1332 | if (to_host) | |
1333 | memcpy(ubuf, rbuf, len); | |
1334 | else | |
1335 | memcpy(rbuf, ubuf, len); | |
1336 | return len; | |
1337 | } | |
1338 | ||
1339 | if (!urbp->miter_started) { | |
1340 | u32 flags = SG_MITER_ATOMIC; | |
1341 | ||
1342 | if (to_host) | |
1343 | flags |= SG_MITER_TO_SG; | |
1344 | else | |
1345 | flags |= SG_MITER_FROM_SG; | |
1346 | ||
1347 | sg_miter_start(miter, urb->sg, urb->num_sgs, flags); | |
1348 | urbp->miter_started = 1; | |
1349 | } | |
1350 | next_sg = sg_miter_next(miter); | |
1351 | if (next_sg == false) { | |
1352 | WARN_ON_ONCE(1); | |
1353 | return -EINVAL; | |
1354 | } | |
1355 | do { | |
1356 | ubuf = miter->addr; | |
1357 | this_sg = min_t(u32, len, miter->length); | |
1358 | miter->consumed = this_sg; | |
1359 | trans += this_sg; | |
1360 | ||
1361 | if (to_host) | |
1362 | memcpy(ubuf, rbuf, this_sg); | |
1363 | else | |
1364 | memcpy(rbuf, ubuf, this_sg); | |
1365 | len -= this_sg; | |
1366 | ||
1367 | if (!len) | |
1368 | break; | |
1369 | next_sg = sg_miter_next(miter); | |
1370 | if (next_sg == false) { | |
1371 | WARN_ON_ONCE(1); | |
1372 | return -EINVAL; | |
1373 | } | |
1374 | ||
1375 | rbuf += this_sg; | |
1376 | } while (1); | |
1377 | ||
1378 | sg_miter_stop(miter); | |
1379 | return trans; | |
a04ce20d SAS |
1380 | } |
1381 | ||
1da177e4 | 1382 | /* transfer up to a frame's worth; caller must own lock */ |
a54c979f SAS |
1383 | static int transfer(struct dummy_hcd *dum_hcd, struct urb *urb, |
1384 | struct dummy_ep *ep, int limit, int *status) | |
1da177e4 | 1385 | { |
a54c979f | 1386 | struct dummy *dum = dum_hcd->dum; |
1da177e4 | 1387 | struct dummy_request *req; |
9a9ce1df | 1388 | int sent = 0; |
1da177e4 LT |
1389 | |
1390 | top: | |
1391 | /* if there's no request queued, the device is NAKing; return */ | |
18f2cbaa | 1392 | list_for_each_entry(req, &ep->queue, queue) { |
1da177e4 LT |
1393 | unsigned host_len, dev_len, len; |
1394 | int is_short, to_host; | |
1395 | int rescan = 0; | |
1396 | ||
a54c979f SAS |
1397 | if (dummy_ep_stream_en(dum_hcd, urb)) { |
1398 | if ((urb->stream_id != req->req.stream_id)) | |
1399 | continue; | |
1400 | } | |
1401 | ||
1da177e4 LT |
1402 | /* 1..N packets of ep->ep.maxpacket each ... the last one |
1403 | * may be short (including zero length). | |
1404 | * | |
1405 | * writer can send a zlp explicitly (length 0) or implicitly | |
1406 | * (length mod maxpacket zero, and 'zero' flag); they always | |
1407 | * terminate reads. | |
1408 | */ | |
1409 | host_len = urb->transfer_buffer_length - urb->actual_length; | |
1410 | dev_len = req->req.length - req->req.actual; | |
18f2cbaa | 1411 | len = min(host_len, dev_len); |
1da177e4 LT |
1412 | |
1413 | /* FIXME update emulated data toggle too */ | |
1414 | ||
18f2cbaa SAS |
1415 | to_host = usb_pipein(urb->pipe); |
1416 | if (unlikely(len == 0)) | |
1da177e4 LT |
1417 | is_short = 1; |
1418 | else { | |
1da177e4 LT |
1419 | /* not enough bandwidth left? */ |
1420 | if (limit < ep->ep.maxpacket && limit < len) | |
1421 | break; | |
18f2cbaa | 1422 | len = min_t(unsigned, len, limit); |
1da177e4 LT |
1423 | if (len == 0) |
1424 | break; | |
1425 | ||
e42bd6a5 IK |
1426 | /* send multiple of maxpacket first, then remainder */ |
1427 | if (len >= ep->ep.maxpacket) { | |
1428 | is_short = 0; | |
1429 | if (len % ep->ep.maxpacket) | |
1430 | rescan = 1; | |
1431 | len -= len % ep->ep.maxpacket; | |
1432 | } else { | |
1433 | is_short = 1; | |
1da177e4 | 1434 | } |
1da177e4 | 1435 | |
a04ce20d SAS |
1436 | len = dummy_perform_transfer(urb, req, len); |
1437 | ||
1da177e4 | 1438 | ep->last_io = jiffies; |
b1443ac0 | 1439 | if ((int)len < 0) { |
14fce33a SAS |
1440 | req->req.status = len; |
1441 | } else { | |
1442 | limit -= len; | |
9a9ce1df | 1443 | sent += len; |
14fce33a SAS |
1444 | urb->actual_length += len; |
1445 | req->req.actual += len; | |
1446 | } | |
1da177e4 LT |
1447 | } |
1448 | ||
1449 | /* short packets terminate, maybe with overflow/underflow. | |
1450 | * it's only really an error to write too much. | |
1451 | * | |
1452 | * partially filling a buffer optionally blocks queue advances | |
1453 | * (so completion handlers can clean up the queue) but we don't | |
b0d9efba | 1454 | * need to emulate such data-in-flight. |
1da177e4 LT |
1455 | */ |
1456 | if (is_short) { | |
1457 | if (host_len == dev_len) { | |
1458 | req->req.status = 0; | |
4d2f110c | 1459 | *status = 0; |
1da177e4 LT |
1460 | } else if (to_host) { |
1461 | req->req.status = 0; | |
1462 | if (dev_len > host_len) | |
4d2f110c | 1463 | *status = -EOVERFLOW; |
1da177e4 | 1464 | else |
4d2f110c | 1465 | *status = 0; |
5dda5be9 | 1466 | } else { |
4d2f110c | 1467 | *status = 0; |
1da177e4 LT |
1468 | if (host_len > dev_len) |
1469 | req->req.status = -EOVERFLOW; | |
1470 | else | |
1471 | req->req.status = 0; | |
1472 | } | |
1473 | ||
21c3ee93 IK |
1474 | /* |
1475 | * many requests terminate without a short packet. | |
1476 | * send a zlp if demanded by flags. | |
1477 | */ | |
1da177e4 | 1478 | } else { |
21c3ee93 IK |
1479 | if (req->req.length == req->req.actual) { |
1480 | if (req->req.zero && to_host) | |
1481 | rescan = 1; | |
1482 | else | |
1483 | req->req.status = 0; | |
1484 | } | |
1485 | if (urb->transfer_buffer_length == urb->actual_length) { | |
1486 | if (urb->transfer_flags & URB_ZERO_PACKET && | |
1487 | !to_host) | |
1488 | rescan = 1; | |
1489 | else | |
1490 | *status = 0; | |
1491 | } | |
1da177e4 LT |
1492 | } |
1493 | ||
1494 | /* device side completion --> continuable */ | |
1495 | if (req->req.status != -EINPROGRESS) { | |
18f2cbaa | 1496 | list_del_init(&req->queue); |
1da177e4 | 1497 | |
18f2cbaa | 1498 | spin_unlock(&dum->lock); |
304f7e5e | 1499 | usb_gadget_giveback_request(&ep->ep, &req->req); |
18f2cbaa | 1500 | spin_lock(&dum->lock); |
1da177e4 LT |
1501 | |
1502 | /* requests might have been unlinked... */ | |
1503 | rescan = 1; | |
1504 | } | |
1505 | ||
1506 | /* host side completion --> terminate */ | |
4d2f110c | 1507 | if (*status != -EINPROGRESS) |
1da177e4 LT |
1508 | break; |
1509 | ||
1510 | /* rescan to continue with any other queued i/o */ | |
1511 | if (rescan) | |
1512 | goto top; | |
1513 | } | |
9a9ce1df | 1514 | return sent; |
1da177e4 LT |
1515 | } |
1516 | ||
18f2cbaa | 1517 | static int periodic_bytes(struct dummy *dum, struct dummy_ep *ep) |
1da177e4 LT |
1518 | { |
1519 | int limit = ep->ep.maxpacket; | |
1520 | ||
1521 | if (dum->gadget.speed == USB_SPEED_HIGH) { | |
1522 | int tmp; | |
1523 | ||
1524 | /* high bandwidth mode */ | |
ee8ac855 | 1525 | tmp = usb_endpoint_maxp_mult(ep->desc); |
1da177e4 LT |
1526 | tmp *= 8 /* applies to entire frame */; |
1527 | limit += limit * tmp; | |
1528 | } | |
1cd8fd28 | 1529 | if (dum->gadget.speed == USB_SPEED_SUPER) { |
59f08e6d | 1530 | switch (usb_endpoint_type(ep->desc)) { |
1cd8fd28 TB |
1531 | case USB_ENDPOINT_XFER_ISOC: |
1532 | /* Sec. 4.4.8.2 USB3.0 Spec */ | |
1533 | limit = 3 * 16 * 1024 * 8; | |
1534 | break; | |
1535 | case USB_ENDPOINT_XFER_INT: | |
1536 | /* Sec. 4.4.7.2 USB3.0 Spec */ | |
1537 | limit = 3 * 1024 * 8; | |
1538 | break; | |
1539 | case USB_ENDPOINT_XFER_BULK: | |
1540 | default: | |
1541 | break; | |
1542 | } | |
1543 | } | |
1da177e4 LT |
1544 | return limit; |
1545 | } | |
1546 | ||
cdfcbd2c | 1547 | #define is_active(dum_hcd) ((dum_hcd->port_status & \ |
1da177e4 LT |
1548 | (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \ |
1549 | USB_PORT_STAT_SUSPEND)) \ | |
1550 | == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE)) | |
1551 | ||
18f2cbaa | 1552 | static struct dummy_ep *find_endpoint(struct dummy *dum, u8 address) |
1da177e4 LT |
1553 | { |
1554 | int i; | |
1555 | ||
1cd8fd28 TB |
1556 | if (!is_active((dum->gadget.speed == USB_SPEED_SUPER ? |
1557 | dum->ss_hcd : dum->hs_hcd))) | |
1da177e4 | 1558 | return NULL; |
7dbd8f4c AS |
1559 | if (!dum->ints_enabled) |
1560 | return NULL; | |
1da177e4 | 1561 | if ((address & ~USB_DIR_IN) == 0) |
18f2cbaa | 1562 | return &dum->ep[0]; |
1da177e4 | 1563 | for (i = 1; i < DUMMY_ENDPOINTS; i++) { |
18f2cbaa | 1564 | struct dummy_ep *ep = &dum->ep[i]; |
1da177e4 LT |
1565 | |
1566 | if (!ep->desc) | |
1567 | continue; | |
1568 | if (ep->desc->bEndpointAddress == address) | |
1569 | return ep; | |
1570 | } | |
1571 | return NULL; | |
1572 | } | |
1573 | ||
1574 | #undef is_active | |
1575 | ||
1576 | #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE) | |
1577 | #define Dev_InRequest (Dev_Request | USB_DIR_IN) | |
1578 | #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE) | |
1579 | #define Intf_InRequest (Intf_Request | USB_DIR_IN) | |
1580 | #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT) | |
1581 | #define Ep_InRequest (Ep_Request | USB_DIR_IN) | |
1582 | ||
8be8a9d3 TB |
1583 | |
1584 | /** | |
1585 | * handle_control_request() - handles all control transfers | |
1586 | * @dum: pointer to dummy (the_controller) | |
1587 | * @urb: the urb request to handle | |
1588 | * @setup: pointer to the setup data for a USB device control | |
1589 | * request | |
1590 | * @status: pointer to request handling status | |
1591 | * | |
1592 | * Return 0 - if the request was handled | |
1593 | * 1 - if the request wasn't handles | |
1594 | * error code on error | |
1595 | */ | |
cdfcbd2c | 1596 | static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb, |
8be8a9d3 TB |
1597 | struct usb_ctrlrequest *setup, |
1598 | int *status) | |
1599 | { | |
1600 | struct dummy_ep *ep2; | |
cdfcbd2c | 1601 | struct dummy *dum = dum_hcd->dum; |
8be8a9d3 TB |
1602 | int ret_val = 1; |
1603 | unsigned w_index; | |
1604 | unsigned w_value; | |
1605 | ||
1606 | w_index = le16_to_cpu(setup->wIndex); | |
1607 | w_value = le16_to_cpu(setup->wValue); | |
1608 | switch (setup->bRequest) { | |
1609 | case USB_REQ_SET_ADDRESS: | |
1610 | if (setup->bRequestType != Dev_Request) | |
1611 | break; | |
1612 | dum->address = w_value; | |
1613 | *status = 0; | |
1614 | dev_dbg(udc_dev(dum), "set_address = %d\n", | |
1615 | w_value); | |
1616 | ret_val = 0; | |
1617 | break; | |
1618 | case USB_REQ_SET_FEATURE: | |
1619 | if (setup->bRequestType == Dev_Request) { | |
1620 | ret_val = 0; | |
1621 | switch (w_value) { | |
1622 | case USB_DEVICE_REMOTE_WAKEUP: | |
1623 | break; | |
1624 | case USB_DEVICE_B_HNP_ENABLE: | |
1625 | dum->gadget.b_hnp_enable = 1; | |
1626 | break; | |
1627 | case USB_DEVICE_A_HNP_SUPPORT: | |
1628 | dum->gadget.a_hnp_support = 1; | |
1629 | break; | |
1630 | case USB_DEVICE_A_ALT_HNP_SUPPORT: | |
1631 | dum->gadget.a_alt_hnp_support = 1; | |
1632 | break; | |
1cd8fd28 TB |
1633 | case USB_DEVICE_U1_ENABLE: |
1634 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1635 | HCD_USB3) | |
1636 | w_value = USB_DEV_STAT_U1_ENABLED; | |
1637 | else | |
1638 | ret_val = -EOPNOTSUPP; | |
1639 | break; | |
1640 | case USB_DEVICE_U2_ENABLE: | |
1641 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1642 | HCD_USB3) | |
1643 | w_value = USB_DEV_STAT_U2_ENABLED; | |
1644 | else | |
1645 | ret_val = -EOPNOTSUPP; | |
1646 | break; | |
1647 | case USB_DEVICE_LTM_ENABLE: | |
1648 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1649 | HCD_USB3) | |
1650 | w_value = USB_DEV_STAT_LTM_ENABLED; | |
1651 | else | |
1652 | ret_val = -EOPNOTSUPP; | |
1653 | break; | |
8be8a9d3 TB |
1654 | default: |
1655 | ret_val = -EOPNOTSUPP; | |
1656 | } | |
1657 | if (ret_val == 0) { | |
1658 | dum->devstatus |= (1 << w_value); | |
1659 | *status = 0; | |
1660 | } | |
1661 | } else if (setup->bRequestType == Ep_Request) { | |
1662 | /* endpoint halt */ | |
1663 | ep2 = find_endpoint(dum, w_index); | |
1664 | if (!ep2 || ep2->ep.name == ep0name) { | |
1665 | ret_val = -EOPNOTSUPP; | |
1666 | break; | |
1667 | } | |
1668 | ep2->halted = 1; | |
1669 | ret_val = 0; | |
1670 | *status = 0; | |
1671 | } | |
1672 | break; | |
1673 | case USB_REQ_CLEAR_FEATURE: | |
1674 | if (setup->bRequestType == Dev_Request) { | |
1675 | ret_val = 0; | |
1676 | switch (w_value) { | |
1677 | case USB_DEVICE_REMOTE_WAKEUP: | |
1678 | w_value = USB_DEVICE_REMOTE_WAKEUP; | |
1679 | break; | |
1cd8fd28 TB |
1680 | case USB_DEVICE_U1_ENABLE: |
1681 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1682 | HCD_USB3) | |
1683 | w_value = USB_DEV_STAT_U1_ENABLED; | |
1684 | else | |
1685 | ret_val = -EOPNOTSUPP; | |
1686 | break; | |
1687 | case USB_DEVICE_U2_ENABLE: | |
1688 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1689 | HCD_USB3) | |
1690 | w_value = USB_DEV_STAT_U2_ENABLED; | |
1691 | else | |
1692 | ret_val = -EOPNOTSUPP; | |
1693 | break; | |
1694 | case USB_DEVICE_LTM_ENABLE: | |
1695 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1696 | HCD_USB3) | |
1697 | w_value = USB_DEV_STAT_LTM_ENABLED; | |
1698 | else | |
1699 | ret_val = -EOPNOTSUPP; | |
1700 | break; | |
8be8a9d3 TB |
1701 | default: |
1702 | ret_val = -EOPNOTSUPP; | |
1703 | break; | |
1704 | } | |
1705 | if (ret_val == 0) { | |
1706 | dum->devstatus &= ~(1 << w_value); | |
1707 | *status = 0; | |
1708 | } | |
1709 | } else if (setup->bRequestType == Ep_Request) { | |
1710 | /* endpoint halt */ | |
1711 | ep2 = find_endpoint(dum, w_index); | |
1712 | if (!ep2) { | |
1713 | ret_val = -EOPNOTSUPP; | |
1714 | break; | |
1715 | } | |
1716 | if (!ep2->wedged) | |
1717 | ep2->halted = 0; | |
1718 | ret_val = 0; | |
1719 | *status = 0; | |
1720 | } | |
1721 | break; | |
1722 | case USB_REQ_GET_STATUS: | |
1723 | if (setup->bRequestType == Dev_InRequest | |
1724 | || setup->bRequestType == Intf_InRequest | |
1725 | || setup->bRequestType == Ep_InRequest) { | |
1726 | char *buf; | |
1727 | /* | |
1728 | * device: remote wakeup, selfpowered | |
1729 | * interface: nothing | |
1730 | * endpoint: halt | |
1731 | */ | |
1732 | buf = (char *)urb->transfer_buffer; | |
1733 | if (urb->transfer_buffer_length > 0) { | |
1734 | if (setup->bRequestType == Ep_InRequest) { | |
1735 | ep2 = find_endpoint(dum, w_index); | |
1736 | if (!ep2) { | |
1737 | ret_val = -EOPNOTSUPP; | |
1738 | break; | |
1739 | } | |
1740 | buf[0] = ep2->halted; | |
1741 | } else if (setup->bRequestType == | |
1742 | Dev_InRequest) { | |
1743 | buf[0] = (u8)dum->devstatus; | |
1744 | } else | |
1745 | buf[0] = 0; | |
1746 | } | |
1747 | if (urb->transfer_buffer_length > 1) | |
1748 | buf[1] = 0; | |
1749 | urb->actual_length = min_t(u32, 2, | |
1750 | urb->transfer_buffer_length); | |
1751 | ret_val = 0; | |
1752 | *status = 0; | |
1753 | } | |
1754 | break; | |
1755 | } | |
1756 | return ret_val; | |
1757 | } | |
1758 | ||
1da177e4 LT |
1759 | /* drive both sides of the transfers; looks like irq handlers to |
1760 | * both drivers except the callbacks aren't in_irq(). | |
1761 | */ | |
e99e88a9 | 1762 | static void dummy_timer(struct timer_list *t) |
1da177e4 | 1763 | { |
e99e88a9 | 1764 | struct dummy_hcd *dum_hcd = from_timer(dum_hcd, t, timer); |
cdfcbd2c | 1765 | struct dummy *dum = dum_hcd->dum; |
1da177e4 LT |
1766 | struct urbp *urbp, *tmp; |
1767 | unsigned long flags; | |
1768 | int limit, total; | |
1769 | int i; | |
1770 | ||
1771 | /* simplistic model for one frame's bandwidth */ | |
ffc4ea79 | 1772 | /* FIXME: account for transaction and packet overhead */ |
1da177e4 LT |
1773 | switch (dum->gadget.speed) { |
1774 | case USB_SPEED_LOW: | |
1775 | total = 8/*bytes*/ * 12/*packets*/; | |
1776 | break; | |
1777 | case USB_SPEED_FULL: | |
1778 | total = 64/*bytes*/ * 19/*packets*/; | |
1779 | break; | |
1780 | case USB_SPEED_HIGH: | |
1781 | total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/; | |
1782 | break; | |
1cd8fd28 TB |
1783 | case USB_SPEED_SUPER: |
1784 | /* Bus speed is 500000 bytes/ms, so use a little less */ | |
1785 | total = 490000; | |
1786 | break; | |
1da177e4 | 1787 | default: |
cdfcbd2c | 1788 | dev_err(dummy_dev(dum_hcd), "bogus device speed\n"); |
1da177e4 LT |
1789 | return; |
1790 | } | |
1791 | ||
1792 | /* FIXME if HZ != 1000 this will probably misbehave ... */ | |
1793 | ||
1794 | /* look at each urb queued by the host side driver */ | |
18f2cbaa | 1795 | spin_lock_irqsave(&dum->lock, flags); |
1da177e4 | 1796 | |
cdfcbd2c TB |
1797 | if (!dum_hcd->udev) { |
1798 | dev_err(dummy_dev(dum_hcd), | |
1da177e4 | 1799 | "timer fired with no URBs pending?\n"); |
18f2cbaa | 1800 | spin_unlock_irqrestore(&dum->lock, flags); |
1da177e4 LT |
1801 | return; |
1802 | } | |
0173a68b | 1803 | dum_hcd->next_frame_urbp = NULL; |
1da177e4 LT |
1804 | |
1805 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
7a3b8e70 | 1806 | if (!ep_info[i].name) |
1da177e4 | 1807 | break; |
18f2cbaa | 1808 | dum->ep[i].already_seen = 0; |
1da177e4 LT |
1809 | } |
1810 | ||
1811 | restart: | |
cdfcbd2c | 1812 | list_for_each_entry_safe(urbp, tmp, &dum_hcd->urbp_list, urbp_list) { |
1da177e4 LT |
1813 | struct urb *urb; |
1814 | struct dummy_request *req; | |
1815 | u8 address; | |
1816 | struct dummy_ep *ep = NULL; | |
4d2f110c | 1817 | int status = -EINPROGRESS; |
1da177e4 | 1818 | |
0173a68b AS |
1819 | /* stop when we reach URBs queued after the timer interrupt */ |
1820 | if (urbp == dum_hcd->next_frame_urbp) | |
1821 | break; | |
1822 | ||
1da177e4 | 1823 | urb = urbp->urb; |
eb231054 | 1824 | if (urb->unlinked) |
1da177e4 | 1825 | goto return_urb; |
cdfcbd2c | 1826 | else if (dum_hcd->rh_state != DUMMY_RH_RUNNING) |
391eca9d | 1827 | continue; |
1da177e4 | 1828 | |
ffc4ea79 AS |
1829 | /* Used up this frame's bandwidth? */ |
1830 | if (total <= 0) | |
1831 | break; | |
1da177e4 LT |
1832 | |
1833 | /* find the gadget's ep for this request (if configured) */ | |
1834 | address = usb_pipeendpoint (urb->pipe); | |
18f2cbaa | 1835 | if (usb_pipein(urb->pipe)) |
1da177e4 LT |
1836 | address |= USB_DIR_IN; |
1837 | ep = find_endpoint(dum, address); | |
1838 | if (!ep) { | |
1839 | /* set_configuration() disagreement */ | |
cdfcbd2c | 1840 | dev_dbg(dummy_dev(dum_hcd), |
1da177e4 LT |
1841 | "no ep configured for urb %p\n", |
1842 | urb); | |
4d2f110c | 1843 | status = -EPROTO; |
1da177e4 LT |
1844 | goto return_urb; |
1845 | } | |
1846 | ||
1847 | if (ep->already_seen) | |
1848 | continue; | |
1849 | ep->already_seen = 1; | |
18f2cbaa | 1850 | if (ep == &dum->ep[0] && urb->error_count) { |
1da177e4 LT |
1851 | ep->setup_stage = 1; /* a new urb */ |
1852 | urb->error_count = 0; | |
1853 | } | |
1854 | if (ep->halted && !ep->setup_stage) { | |
1855 | /* NOTE: must not be iso! */ | |
cdfcbd2c | 1856 | dev_dbg(dummy_dev(dum_hcd), "ep %s halted, urb %p\n", |
1da177e4 | 1857 | ep->ep.name, urb); |
4d2f110c | 1858 | status = -EPIPE; |
1da177e4 LT |
1859 | goto return_urb; |
1860 | } | |
1861 | /* FIXME make sure both ends agree on maxpacket */ | |
1862 | ||
1863 | /* handle control requests */ | |
18f2cbaa | 1864 | if (ep == &dum->ep[0] && ep->setup_stage) { |
1da177e4 LT |
1865 | struct usb_ctrlrequest setup; |
1866 | int value = 1; | |
1da177e4 | 1867 | |
18f2cbaa | 1868 | setup = *(struct usb_ctrlrequest *) urb->setup_packet; |
1da177e4 | 1869 | /* paranoia, in case of stale queued data */ |
18f2cbaa SAS |
1870 | list_for_each_entry(req, &ep->queue, queue) { |
1871 | list_del_init(&req->queue); | |
1da177e4 | 1872 | req->req.status = -EOVERFLOW; |
18f2cbaa | 1873 | dev_dbg(udc_dev(dum), "stale req = %p\n", |
1da177e4 LT |
1874 | req); |
1875 | ||
18f2cbaa | 1876 | spin_unlock(&dum->lock); |
304f7e5e | 1877 | usb_gadget_giveback_request(&ep->ep, &req->req); |
18f2cbaa | 1878 | spin_lock(&dum->lock); |
1da177e4 LT |
1879 | ep->already_seen = 0; |
1880 | goto restart; | |
1881 | } | |
1882 | ||
1883 | /* gadget driver never sees set_address or operations | |
1884 | * on standard feature flags. some hardware doesn't | |
1885 | * even expose them. | |
1886 | */ | |
1887 | ep->last_io = jiffies; | |
1888 | ep->setup_stage = 0; | |
1889 | ep->halted = 0; | |
1da177e4 | 1890 | |
cdfcbd2c | 1891 | value = handle_control_request(dum_hcd, urb, &setup, |
8be8a9d3 | 1892 | &status); |
1da177e4 LT |
1893 | |
1894 | /* gadget driver handles all other requests. block | |
1895 | * until setup() returns; no reentrancy issues etc. | |
1896 | */ | |
1897 | if (value > 0) { | |
7dbd8f4c | 1898 | ++dum->callback_usage; |
18f2cbaa SAS |
1899 | spin_unlock(&dum->lock); |
1900 | value = dum->driver->setup(&dum->gadget, | |
1da177e4 | 1901 | &setup); |
18f2cbaa | 1902 | spin_lock(&dum->lock); |
7dbd8f4c | 1903 | --dum->callback_usage; |
1da177e4 LT |
1904 | |
1905 | if (value >= 0) { | |
1906 | /* no delays (max 64KB data stage) */ | |
1907 | limit = 64*1024; | |
1908 | goto treat_control_like_bulk; | |
1909 | } | |
1910 | /* error, see below */ | |
1911 | } | |
1912 | ||
1913 | if (value < 0) { | |
1914 | if (value != -EOPNOTSUPP) | |
18f2cbaa | 1915 | dev_dbg(udc_dev(dum), |
1da177e4 LT |
1916 | "setup --> %d\n", |
1917 | value); | |
4d2f110c | 1918 | status = -EPIPE; |
1da177e4 LT |
1919 | urb->actual_length = 0; |
1920 | } | |
1921 | ||
1922 | goto return_urb; | |
1923 | } | |
1924 | ||
1925 | /* non-control requests */ | |
1926 | limit = total; | |
18f2cbaa | 1927 | switch (usb_pipetype(urb->pipe)) { |
1da177e4 | 1928 | case PIPE_ISOCHRONOUS: |
c9f20aaf AS |
1929 | /* |
1930 | * We don't support isochronous. But if we did, | |
1931 | * here are some of the issues we'd have to face: | |
1932 | * | |
1933 | * Is it urb->interval since the last xfer? | |
1934 | * Use urb->iso_frame_desc[i]. | |
1935 | * Complete whether or not ep has requests queued. | |
1936 | * Report random errors, to debug drivers. | |
1da177e4 | 1937 | */ |
18f2cbaa | 1938 | limit = max(limit, periodic_bytes(dum, ep)); |
c9f20aaf | 1939 | status = -EINVAL; /* fail all xfers */ |
1da177e4 LT |
1940 | break; |
1941 | ||
1942 | case PIPE_INTERRUPT: | |
1943 | /* FIXME is it urb->interval since the last xfer? | |
1944 | * this almost certainly polls too fast. | |
1945 | */ | |
18f2cbaa | 1946 | limit = max(limit, periodic_bytes(dum, ep)); |
1da177e4 LT |
1947 | /* FALLTHROUGH */ |
1948 | ||
1da177e4 | 1949 | default: |
18f2cbaa | 1950 | treat_control_like_bulk: |
1da177e4 | 1951 | ep->last_io = jiffies; |
9a9ce1df | 1952 | total -= transfer(dum_hcd, urb, ep, limit, &status); |
1da177e4 LT |
1953 | break; |
1954 | } | |
1955 | ||
1956 | /* incomplete transfer? */ | |
4d2f110c | 1957 | if (status == -EINPROGRESS) |
1da177e4 LT |
1958 | continue; |
1959 | ||
1960 | return_urb: | |
18f2cbaa SAS |
1961 | list_del(&urbp->urbp_list); |
1962 | kfree(urbp); | |
1da177e4 LT |
1963 | if (ep) |
1964 | ep->already_seen = ep->setup_stage = 0; | |
1965 | ||
cdfcbd2c | 1966 | usb_hcd_unlink_urb_from_ep(dummy_hcd_to_hcd(dum_hcd), urb); |
18f2cbaa | 1967 | spin_unlock(&dum->lock); |
cdfcbd2c | 1968 | usb_hcd_giveback_urb(dummy_hcd_to_hcd(dum_hcd), urb, status); |
18f2cbaa | 1969 | spin_lock(&dum->lock); |
1da177e4 LT |
1970 | |
1971 | goto restart; | |
1972 | } | |
1973 | ||
cdfcbd2c TB |
1974 | if (list_empty(&dum_hcd->urbp_list)) { |
1975 | usb_put_dev(dum_hcd->udev); | |
1976 | dum_hcd->udev = NULL; | |
1977 | } else if (dum_hcd->rh_state == DUMMY_RH_RUNNING) { | |
391eca9d | 1978 | /* want a 1 msec delay here */ |
cdfcbd2c | 1979 | mod_timer(&dum_hcd->timer, jiffies + msecs_to_jiffies(1)); |
1da177e4 LT |
1980 | } |
1981 | ||
18f2cbaa | 1982 | spin_unlock_irqrestore(&dum->lock, flags); |
1da177e4 LT |
1983 | } |
1984 | ||
1985 | /*-------------------------------------------------------------------------*/ | |
1986 | ||
1987 | #define PORT_C_MASK \ | |
c2db8b5e AS |
1988 | ((USB_PORT_STAT_C_CONNECTION \ |
1989 | | USB_PORT_STAT_C_ENABLE \ | |
1990 | | USB_PORT_STAT_C_SUSPEND \ | |
1991 | | USB_PORT_STAT_C_OVERCURRENT \ | |
1992 | | USB_PORT_STAT_C_RESET) << 16) | |
1da177e4 | 1993 | |
18f2cbaa | 1994 | static int dummy_hub_status(struct usb_hcd *hcd, char *buf) |
1da177e4 | 1995 | { |
cdfcbd2c | 1996 | struct dummy_hcd *dum_hcd; |
1da177e4 | 1997 | unsigned long flags; |
391eca9d | 1998 | int retval = 0; |
1da177e4 | 1999 | |
cdfcbd2c | 2000 | dum_hcd = hcd_to_dummy_hcd(hcd); |
1da177e4 | 2001 | |
cdfcbd2c | 2002 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); |
541c7d43 | 2003 | if (!HCD_HW_ACCESSIBLE(hcd)) |
391eca9d | 2004 | goto done; |
f1c39fad | 2005 | |
cdfcbd2c TB |
2006 | if (dum_hcd->resuming && time_after_eq(jiffies, dum_hcd->re_timeout)) { |
2007 | dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); | |
2008 | dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND; | |
2009 | set_link_state(dum_hcd); | |
f1c39fad AS |
2010 | } |
2011 | ||
cdfcbd2c | 2012 | if ((dum_hcd->port_status & PORT_C_MASK) != 0) { |
1da177e4 | 2013 | *buf = (1 << 1); |
cdfcbd2c TB |
2014 | dev_dbg(dummy_dev(dum_hcd), "port status 0x%08x has changes\n", |
2015 | dum_hcd->port_status); | |
1da177e4 | 2016 | retval = 1; |
cdfcbd2c | 2017 | if (dum_hcd->rh_state == DUMMY_RH_SUSPENDED) |
18f2cbaa | 2018 | usb_hcd_resume_root_hub(hcd); |
1da177e4 | 2019 | } |
391eca9d | 2020 | done: |
cdfcbd2c | 2021 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
1da177e4 LT |
2022 | return retval; |
2023 | } | |
2024 | ||
3b9c1c5b | 2025 | /* usb 3.0 root hub device descriptor */ |
814cf212 | 2026 | static struct { |
3b9c1c5b SAS |
2027 | struct usb_bos_descriptor bos; |
2028 | struct usb_ss_cap_descriptor ss_cap; | |
2029 | } __packed usb3_bos_desc = { | |
2030 | ||
2031 | .bos = { | |
2032 | .bLength = USB_DT_BOS_SIZE, | |
2033 | .bDescriptorType = USB_DT_BOS, | |
2034 | .wTotalLength = cpu_to_le16(sizeof(usb3_bos_desc)), | |
2035 | .bNumDeviceCaps = 1, | |
2036 | }, | |
2037 | .ss_cap = { | |
2038 | .bLength = USB_DT_USB_SS_CAP_SIZE, | |
2039 | .bDescriptorType = USB_DT_DEVICE_CAPABILITY, | |
2040 | .bDevCapabilityType = USB_SS_CAP_TYPE, | |
2041 | .wSpeedSupported = cpu_to_le16(USB_5GBPS_OPERATION), | |
2042 | .bFunctionalitySupport = ilog2(USB_5GBPS_OPERATION), | |
2043 | }, | |
2044 | }; | |
2045 | ||
1cd8fd28 TB |
2046 | static inline void |
2047 | ss_hub_descriptor(struct usb_hub_descriptor *desc) | |
2048 | { | |
2049 | memset(desc, 0, sizeof *desc); | |
2569ffd5 | 2050 | desc->bDescriptorType = USB_DT_SS_HUB; |
1cd8fd28 | 2051 | desc->bDescLength = 12; |
d906d61c SS |
2052 | desc->wHubCharacteristics = cpu_to_le16( |
2053 | HUB_CHAR_INDV_PORT_LPSM | | |
2054 | HUB_CHAR_COMMON_OCPM); | |
1cd8fd28 TB |
2055 | desc->bNbrPorts = 1; |
2056 | desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/ | |
d81182ce | 2057 | desc->u.ss.DeviceRemovable = 0; |
1cd8fd28 TB |
2058 | } |
2059 | ||
18f2cbaa | 2060 | static inline void hub_descriptor(struct usb_hub_descriptor *desc) |
1da177e4 | 2061 | { |
18f2cbaa | 2062 | memset(desc, 0, sizeof *desc); |
2569ffd5 | 2063 | desc->bDescriptorType = USB_DT_HUB; |
1da177e4 | 2064 | desc->bDescLength = 9; |
d906d61c SS |
2065 | desc->wHubCharacteristics = cpu_to_le16( |
2066 | HUB_CHAR_INDV_PORT_LPSM | | |
2067 | HUB_CHAR_COMMON_OCPM); | |
1da177e4 | 2068 | desc->bNbrPorts = 1; |
d81182ce JH |
2069 | desc->u.hs.DeviceRemovable[0] = 0; |
2070 | desc->u.hs.DeviceRemovable[1] = 0xff; /* PortPwrCtrlMask */ | |
1da177e4 LT |
2071 | } |
2072 | ||
18f2cbaa | 2073 | static int dummy_hub_control( |
1da177e4 LT |
2074 | struct usb_hcd *hcd, |
2075 | u16 typeReq, | |
2076 | u16 wValue, | |
2077 | u16 wIndex, | |
2078 | char *buf, | |
2079 | u16 wLength | |
2080 | ) { | |
cdfcbd2c | 2081 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
2082 | int retval = 0; |
2083 | unsigned long flags; | |
2084 | ||
541c7d43 | 2085 | if (!HCD_HW_ACCESSIBLE(hcd)) |
391eca9d AS |
2086 | return -ETIMEDOUT; |
2087 | ||
cdfcbd2c TB |
2088 | dum_hcd = hcd_to_dummy_hcd(hcd); |
2089 | ||
2090 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
1da177e4 LT |
2091 | switch (typeReq) { |
2092 | case ClearHubFeature: | |
2093 | break; | |
2094 | case ClearPortFeature: | |
2095 | switch (wValue) { | |
2096 | case USB_PORT_FEAT_SUSPEND: | |
1cd8fd28 TB |
2097 | if (hcd->speed == HCD_USB3) { |
2098 | dev_dbg(dummy_dev(dum_hcd), | |
2099 | "USB_PORT_FEAT_SUSPEND req not " | |
2100 | "supported for USB 3.0 roothub\n"); | |
2101 | goto error; | |
2102 | } | |
cdfcbd2c | 2103 | if (dum_hcd->port_status & USB_PORT_STAT_SUSPEND) { |
1da177e4 | 2104 | /* 20msec resume signaling */ |
cdfcbd2c TB |
2105 | dum_hcd->resuming = 1; |
2106 | dum_hcd->re_timeout = jiffies + | |
f1c39fad | 2107 | msecs_to_jiffies(20); |
1da177e4 LT |
2108 | } |
2109 | break; | |
2110 | case USB_PORT_FEAT_POWER: | |
9f20dfb4 YD |
2111 | dev_dbg(dummy_dev(dum_hcd), "power-off\n"); |
2112 | if (hcd->speed == HCD_USB3) | |
2113 | dum_hcd->port_status &= ~USB_SS_PORT_STAT_POWER; | |
2114 | else | |
2115 | dum_hcd->port_status &= ~USB_PORT_STAT_POWER; | |
2116 | set_link_state(dum_hcd); | |
2117 | break; | |
1da177e4 | 2118 | default: |
cdfcbd2c TB |
2119 | dum_hcd->port_status &= ~(1 << wValue); |
2120 | set_link_state(dum_hcd); | |
1da177e4 LT |
2121 | } |
2122 | break; | |
2123 | case GetHubDescriptor: | |
1cd8fd28 TB |
2124 | if (hcd->speed == HCD_USB3 && |
2125 | (wLength < USB_DT_SS_HUB_SIZE || | |
2126 | wValue != (USB_DT_SS_HUB << 8))) { | |
2127 | dev_dbg(dummy_dev(dum_hcd), | |
2128 | "Wrong hub descriptor type for " | |
2129 | "USB 3.0 roothub.\n"); | |
2130 | goto error; | |
2131 | } | |
2132 | if (hcd->speed == HCD_USB3) | |
2133 | ss_hub_descriptor((struct usb_hub_descriptor *) buf); | |
2134 | else | |
2135 | hub_descriptor((struct usb_hub_descriptor *) buf); | |
1da177e4 | 2136 | break; |
3b9c1c5b SAS |
2137 | |
2138 | case DeviceRequest | USB_REQ_GET_DESCRIPTOR: | |
2139 | if (hcd->speed != HCD_USB3) | |
2140 | goto error; | |
2141 | ||
2142 | if ((wValue >> 8) != USB_DT_BOS) | |
2143 | goto error; | |
2144 | ||
2145 | memcpy(buf, &usb3_bos_desc, sizeof(usb3_bos_desc)); | |
2146 | retval = sizeof(usb3_bos_desc); | |
2147 | break; | |
2148 | ||
1da177e4 | 2149 | case GetHubStatus: |
18f2cbaa | 2150 | *(__le32 *) buf = cpu_to_le32(0); |
1da177e4 LT |
2151 | break; |
2152 | case GetPortStatus: | |
2153 | if (wIndex != 1) | |
2154 | retval = -EPIPE; | |
2155 | ||
2156 | /* whoever resets or resumes must GetPortStatus to | |
2157 | * complete it!! | |
2158 | */ | |
cdfcbd2c TB |
2159 | if (dum_hcd->resuming && |
2160 | time_after_eq(jiffies, dum_hcd->re_timeout)) { | |
2161 | dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); | |
2162 | dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1da177e4 | 2163 | } |
cdfcbd2c TB |
2164 | if ((dum_hcd->port_status & USB_PORT_STAT_RESET) != 0 && |
2165 | time_after_eq(jiffies, dum_hcd->re_timeout)) { | |
2166 | dum_hcd->port_status |= (USB_PORT_STAT_C_RESET << 16); | |
2167 | dum_hcd->port_status &= ~USB_PORT_STAT_RESET; | |
2168 | if (dum_hcd->dum->pullup) { | |
2169 | dum_hcd->port_status |= USB_PORT_STAT_ENABLE; | |
1cd8fd28 TB |
2170 | |
2171 | if (hcd->speed < HCD_USB3) { | |
2172 | switch (dum_hcd->dum->gadget.speed) { | |
2173 | case USB_SPEED_HIGH: | |
2174 | dum_hcd->port_status |= | |
2175 | USB_PORT_STAT_HIGH_SPEED; | |
2176 | break; | |
2177 | case USB_SPEED_LOW: | |
2178 | dum_hcd->dum->gadget.ep0-> | |
2179 | maxpacket = 8; | |
2180 | dum_hcd->port_status |= | |
2181 | USB_PORT_STAT_LOW_SPEED; | |
2182 | break; | |
2183 | default: | |
1cd8fd28 TB |
2184 | break; |
2185 | } | |
1da177e4 LT |
2186 | } |
2187 | } | |
2188 | } | |
cdfcbd2c | 2189 | set_link_state(dum_hcd); |
18f2cbaa SAS |
2190 | ((__le16 *) buf)[0] = cpu_to_le16(dum_hcd->port_status); |
2191 | ((__le16 *) buf)[1] = cpu_to_le16(dum_hcd->port_status >> 16); | |
1da177e4 LT |
2192 | break; |
2193 | case SetHubFeature: | |
2194 | retval = -EPIPE; | |
2195 | break; | |
2196 | case SetPortFeature: | |
2197 | switch (wValue) { | |
1cd8fd28 TB |
2198 | case USB_PORT_FEAT_LINK_STATE: |
2199 | if (hcd->speed != HCD_USB3) { | |
2200 | dev_dbg(dummy_dev(dum_hcd), | |
2201 | "USB_PORT_FEAT_LINK_STATE req not " | |
2202 | "supported for USB 2.0 roothub\n"); | |
2203 | goto error; | |
2204 | } | |
2205 | /* | |
2206 | * Since this is dummy we don't have an actual link so | |
2207 | * there is nothing to do for the SET_LINK_STATE cmd | |
2208 | */ | |
2209 | break; | |
2210 | case USB_PORT_FEAT_U1_TIMEOUT: | |
2211 | case USB_PORT_FEAT_U2_TIMEOUT: | |
2212 | /* TODO: add suspend/resume support! */ | |
2213 | if (hcd->speed != HCD_USB3) { | |
2214 | dev_dbg(dummy_dev(dum_hcd), | |
2215 | "USB_PORT_FEAT_U1/2_TIMEOUT req not " | |
2216 | "supported for USB 2.0 roothub\n"); | |
2217 | goto error; | |
2218 | } | |
2219 | break; | |
1da177e4 | 2220 | case USB_PORT_FEAT_SUSPEND: |
1cd8fd28 TB |
2221 | /* Applicable only for USB2.0 hub */ |
2222 | if (hcd->speed == HCD_USB3) { | |
2223 | dev_dbg(dummy_dev(dum_hcd), | |
2224 | "USB_PORT_FEAT_SUSPEND req not " | |
2225 | "supported for USB 3.0 roothub\n"); | |
2226 | goto error; | |
2227 | } | |
cdfcbd2c TB |
2228 | if (dum_hcd->active) { |
2229 | dum_hcd->port_status |= USB_PORT_STAT_SUSPEND; | |
f1c39fad AS |
2230 | |
2231 | /* HNP would happen here; for now we | |
2232 | * assume b_bus_req is always true. | |
2233 | */ | |
cdfcbd2c | 2234 | set_link_state(dum_hcd); |
f1c39fad | 2235 | if (((1 << USB_DEVICE_B_HNP_ENABLE) |
cdfcbd2c TB |
2236 | & dum_hcd->dum->devstatus) != 0) |
2237 | dev_dbg(dummy_dev(dum_hcd), | |
5742b0c9 | 2238 | "no HNP yet!\n"); |
1da177e4 LT |
2239 | } |
2240 | break; | |
f1c39fad | 2241 | case USB_PORT_FEAT_POWER: |
1cd8fd28 TB |
2242 | if (hcd->speed == HCD_USB3) |
2243 | dum_hcd->port_status |= USB_SS_PORT_STAT_POWER; | |
2244 | else | |
2245 | dum_hcd->port_status |= USB_PORT_STAT_POWER; | |
cdfcbd2c | 2246 | set_link_state(dum_hcd); |
f1c39fad | 2247 | break; |
1cd8fd28 TB |
2248 | case USB_PORT_FEAT_BH_PORT_RESET: |
2249 | /* Applicable only for USB3.0 hub */ | |
2250 | if (hcd->speed != HCD_USB3) { | |
2251 | dev_dbg(dummy_dev(dum_hcd), | |
2252 | "USB_PORT_FEAT_BH_PORT_RESET req not " | |
2253 | "supported for USB 2.0 roothub\n"); | |
2254 | goto error; | |
2255 | } | |
2256 | /* FALLS THROUGH */ | |
1da177e4 | 2257 | case USB_PORT_FEAT_RESET: |
f1c39fad | 2258 | /* if it's already enabled, disable */ |
1cd8fd28 TB |
2259 | if (hcd->speed == HCD_USB3) { |
2260 | dum_hcd->port_status = 0; | |
2261 | dum_hcd->port_status = | |
2262 | (USB_SS_PORT_STAT_POWER | | |
2263 | USB_PORT_STAT_CONNECTION | | |
2264 | USB_PORT_STAT_RESET); | |
2265 | } else | |
2266 | dum_hcd->port_status &= ~(USB_PORT_STAT_ENABLE | |
f1c39fad AS |
2267 | | USB_PORT_STAT_LOW_SPEED |
2268 | | USB_PORT_STAT_HIGH_SPEED); | |
cdfcbd2c TB |
2269 | /* |
2270 | * We want to reset device status. All but the | |
2271 | * Self powered feature | |
2272 | */ | |
2273 | dum_hcd->dum->devstatus &= | |
2274 | (1 << USB_DEVICE_SELF_POWERED); | |
1cd8fd28 TB |
2275 | /* |
2276 | * FIXME USB3.0: what is the correct reset signaling | |
2277 | * interval? Is it still 50msec as for HS? | |
2278 | */ | |
cdfcbd2c | 2279 | dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50); |
f1c39fad | 2280 | /* FALLS THROUGH */ |
1da177e4 | 2281 | default: |
1cd8fd28 TB |
2282 | if (hcd->speed == HCD_USB3) { |
2283 | if ((dum_hcd->port_status & | |
2284 | USB_SS_PORT_STAT_POWER) != 0) { | |
2285 | dum_hcd->port_status |= (1 << wValue); | |
1cd8fd28 TB |
2286 | } |
2287 | } else | |
2288 | if ((dum_hcd->port_status & | |
2289 | USB_PORT_STAT_POWER) != 0) { | |
2290 | dum_hcd->port_status |= (1 << wValue); | |
1cd8fd28 | 2291 | } |
9f20dfb4 | 2292 | set_link_state(dum_hcd); |
1cd8fd28 TB |
2293 | } |
2294 | break; | |
2295 | case GetPortErrorCount: | |
2296 | if (hcd->speed != HCD_USB3) { | |
2297 | dev_dbg(dummy_dev(dum_hcd), | |
2298 | "GetPortErrorCount req not " | |
2299 | "supported for USB 2.0 roothub\n"); | |
2300 | goto error; | |
2301 | } | |
2302 | /* We'll always return 0 since this is a dummy hub */ | |
2303 | *(__le32 *) buf = cpu_to_le32(0); | |
2304 | break; | |
2305 | case SetHubDepth: | |
2306 | if (hcd->speed != HCD_USB3) { | |
2307 | dev_dbg(dummy_dev(dum_hcd), | |
2308 | "SetHubDepth req not supported for " | |
2309 | "USB 2.0 roothub\n"); | |
2310 | goto error; | |
1da177e4 LT |
2311 | } |
2312 | break; | |
1da177e4 | 2313 | default: |
cdfcbd2c | 2314 | dev_dbg(dummy_dev(dum_hcd), |
1da177e4 LT |
2315 | "hub control req%04x v%04x i%04x l%d\n", |
2316 | typeReq, wValue, wIndex, wLength); | |
1cd8fd28 | 2317 | error: |
1da177e4 LT |
2318 | /* "protocol stall" on error */ |
2319 | retval = -EPIPE; | |
2320 | } | |
cdfcbd2c | 2321 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
685eb93f | 2322 | |
cdfcbd2c | 2323 | if ((dum_hcd->port_status & PORT_C_MASK) != 0) |
18f2cbaa | 2324 | usb_hcd_poll_rh_status(hcd); |
1da177e4 LT |
2325 | return retval; |
2326 | } | |
2327 | ||
18f2cbaa | 2328 | static int dummy_bus_suspend(struct usb_hcd *hcd) |
391eca9d | 2329 | { |
cdfcbd2c | 2330 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
391eca9d | 2331 | |
18f2cbaa | 2332 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); |
3cf0a22e | 2333 | |
cdfcbd2c TB |
2334 | spin_lock_irq(&dum_hcd->dum->lock); |
2335 | dum_hcd->rh_state = DUMMY_RH_SUSPENDED; | |
2336 | set_link_state(dum_hcd); | |
3cf0a22e | 2337 | hcd->state = HC_STATE_SUSPENDED; |
cdfcbd2c | 2338 | spin_unlock_irq(&dum_hcd->dum->lock); |
391eca9d AS |
2339 | return 0; |
2340 | } | |
2341 | ||
18f2cbaa | 2342 | static int dummy_bus_resume(struct usb_hcd *hcd) |
391eca9d | 2343 | { |
cdfcbd2c | 2344 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
3cf0a22e AS |
2345 | int rc = 0; |
2346 | ||
18f2cbaa | 2347 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); |
391eca9d | 2348 | |
cdfcbd2c | 2349 | spin_lock_irq(&dum_hcd->dum->lock); |
541c7d43 | 2350 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
cfa59dab | 2351 | rc = -ESHUTDOWN; |
3cf0a22e | 2352 | } else { |
cdfcbd2c TB |
2353 | dum_hcd->rh_state = DUMMY_RH_RUNNING; |
2354 | set_link_state(dum_hcd); | |
2355 | if (!list_empty(&dum_hcd->urbp_list)) | |
2356 | mod_timer(&dum_hcd->timer, jiffies); | |
3cf0a22e AS |
2357 | hcd->state = HC_STATE_RUNNING; |
2358 | } | |
cdfcbd2c | 2359 | spin_unlock_irq(&dum_hcd->dum->lock); |
3cf0a22e | 2360 | return rc; |
391eca9d | 2361 | } |
1da177e4 LT |
2362 | |
2363 | /*-------------------------------------------------------------------------*/ | |
2364 | ||
18f2cbaa | 2365 | static inline ssize_t show_urb(char *buf, size_t size, struct urb *urb) |
1da177e4 | 2366 | { |
18f2cbaa | 2367 | int ep = usb_pipeendpoint(urb->pipe); |
1da177e4 | 2368 | |
18f2cbaa | 2369 | return snprintf(buf, size, |
1da177e4 LT |
2370 | "urb/%p %s ep%d%s%s len %d/%d\n", |
2371 | urb, | |
2372 | ({ char *s; | |
18f2cbaa SAS |
2373 | switch (urb->dev->speed) { |
2374 | case USB_SPEED_LOW: | |
7c884fe4 TB |
2375 | s = "ls"; |
2376 | break; | |
18f2cbaa | 2377 | case USB_SPEED_FULL: |
7c884fe4 TB |
2378 | s = "fs"; |
2379 | break; | |
18f2cbaa | 2380 | case USB_SPEED_HIGH: |
7c884fe4 TB |
2381 | s = "hs"; |
2382 | break; | |
18f2cbaa | 2383 | case USB_SPEED_SUPER: |
1cd8fd28 TB |
2384 | s = "ss"; |
2385 | break; | |
18f2cbaa | 2386 | default: |
7c884fe4 TB |
2387 | s = "?"; |
2388 | break; | |
2b84f92b | 2389 | } s; }), |
18f2cbaa | 2390 | ep, ep ? (usb_pipein(urb->pipe) ? "in" : "out") : "", |
1da177e4 | 2391 | ({ char *s; \ |
18f2cbaa SAS |
2392 | switch (usb_pipetype(urb->pipe)) { \ |
2393 | case PIPE_CONTROL: \ | |
7c884fe4 TB |
2394 | s = ""; \ |
2395 | break; \ | |
18f2cbaa | 2396 | case PIPE_BULK: \ |
7c884fe4 TB |
2397 | s = "-bulk"; \ |
2398 | break; \ | |
18f2cbaa | 2399 | case PIPE_INTERRUPT: \ |
7c884fe4 TB |
2400 | s = "-int"; \ |
2401 | break; \ | |
18f2cbaa | 2402 | default: \ |
7c884fe4 TB |
2403 | s = "-iso"; \ |
2404 | break; \ | |
2b84f92b | 2405 | } s; }), |
1da177e4 LT |
2406 | urb->actual_length, urb->transfer_buffer_length); |
2407 | } | |
2408 | ||
ce26bd23 | 2409 | static ssize_t urbs_show(struct device *dev, struct device_attribute *attr, |
18f2cbaa | 2410 | char *buf) |
1da177e4 | 2411 | { |
18f2cbaa | 2412 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
cdfcbd2c | 2413 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
1da177e4 LT |
2414 | struct urbp *urbp; |
2415 | size_t size = 0; | |
2416 | unsigned long flags; | |
2417 | ||
cdfcbd2c TB |
2418 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); |
2419 | list_for_each_entry(urbp, &dum_hcd->urbp_list, urbp_list) { | |
1da177e4 LT |
2420 | size_t temp; |
2421 | ||
18f2cbaa | 2422 | temp = show_urb(buf, PAGE_SIZE - size, urbp->urb); |
1da177e4 LT |
2423 | buf += temp; |
2424 | size += temp; | |
2425 | } | |
cdfcbd2c | 2426 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
1da177e4 LT |
2427 | |
2428 | return size; | |
2429 | } | |
ce26bd23 | 2430 | static DEVICE_ATTR_RO(urbs); |
1da177e4 | 2431 | |
1cd8fd28 TB |
2432 | static int dummy_start_ss(struct dummy_hcd *dum_hcd) |
2433 | { | |
e99e88a9 | 2434 | timer_setup(&dum_hcd->timer, dummy_timer, 0); |
1cd8fd28 | 2435 | dum_hcd->rh_state = DUMMY_RH_RUNNING; |
a54c979f | 2436 | dum_hcd->stream_en_ep = 0; |
1cd8fd28 TB |
2437 | INIT_LIST_HEAD(&dum_hcd->urbp_list); |
2438 | dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET; | |
2439 | dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING; | |
2440 | dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1; | |
2441 | #ifdef CONFIG_USB_OTG | |
2442 | dummy_hcd_to_hcd(dum_hcd)->self.otg_port = 1; | |
2443 | #endif | |
2444 | return 0; | |
2445 | ||
2446 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ | |
2447 | return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs); | |
2448 | } | |
2449 | ||
cdfcbd2c | 2450 | static int dummy_start(struct usb_hcd *hcd) |
1da177e4 | 2451 | { |
cdfcbd2c | 2452 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
1da177e4 LT |
2453 | |
2454 | /* | |
2455 | * MASTER side init ... we emulate a root hub that'll only ever | |
2456 | * talk to one device (the slave side). Also appears in sysfs, | |
2457 | * just like more familiar pci-based HCDs. | |
2458 | */ | |
1cd8fd28 TB |
2459 | if (!usb_hcd_is_primary_hcd(hcd)) |
2460 | return dummy_start_ss(dum_hcd); | |
2461 | ||
cdfcbd2c | 2462 | spin_lock_init(&dum_hcd->dum->lock); |
e99e88a9 | 2463 | timer_setup(&dum_hcd->timer, dummy_timer, 0); |
cdfcbd2c | 2464 | dum_hcd->rh_state = DUMMY_RH_RUNNING; |
1da177e4 | 2465 | |
cdfcbd2c | 2466 | INIT_LIST_HEAD(&dum_hcd->urbp_list); |
1da177e4 | 2467 | |
caf29f62 | 2468 | hcd->power_budget = POWER_BUDGET; |
1da177e4 | 2469 | hcd->state = HC_STATE_RUNNING; |
685eb93f | 2470 | hcd->uses_new_polling = 1; |
1da177e4 | 2471 | |
5742b0c9 AS |
2472 | #ifdef CONFIG_USB_OTG |
2473 | hcd->self.otg_port = 1; | |
2474 | #endif | |
2475 | ||
1da177e4 | 2476 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ |
cdfcbd2c | 2477 | return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs); |
1da177e4 LT |
2478 | } |
2479 | ||
18f2cbaa | 2480 | static void dummy_stop(struct usb_hcd *hcd) |
1da177e4 | 2481 | { |
cdfcbd2c | 2482 | device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs); |
cdfcbd2c | 2483 | dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n"); |
1da177e4 LT |
2484 | } |
2485 | ||
2486 | /*-------------------------------------------------------------------------*/ | |
2487 | ||
18f2cbaa | 2488 | static int dummy_h_get_frame(struct usb_hcd *hcd) |
1da177e4 | 2489 | { |
18f2cbaa | 2490 | return dummy_g_get_frame(NULL); |
1da177e4 LT |
2491 | } |
2492 | ||
cdfcbd2c TB |
2493 | static int dummy_setup(struct usb_hcd *hcd) |
2494 | { | |
b100a2f3 SAS |
2495 | struct dummy *dum; |
2496 | ||
2497 | dum = *((void **)dev_get_platdata(hcd->self.controller)); | |
14fce33a | 2498 | hcd->self.sg_tablesize = ~0; |
cdfcbd2c | 2499 | if (usb_hcd_is_primary_hcd(hcd)) { |
b100a2f3 SAS |
2500 | dum->hs_hcd = hcd_to_dummy_hcd(hcd); |
2501 | dum->hs_hcd->dum = dum; | |
1cd8fd28 TB |
2502 | /* |
2503 | * Mark the first roothub as being USB 2.0. | |
2504 | * The USB 3.0 roothub will be registered later by | |
2505 | * dummy_hcd_probe() | |
2506 | */ | |
cdfcbd2c TB |
2507 | hcd->speed = HCD_USB2; |
2508 | hcd->self.root_hub->speed = USB_SPEED_HIGH; | |
1cd8fd28 | 2509 | } else { |
b100a2f3 SAS |
2510 | dum->ss_hcd = hcd_to_dummy_hcd(hcd); |
2511 | dum->ss_hcd->dum = dum; | |
1cd8fd28 TB |
2512 | hcd->speed = HCD_USB3; |
2513 | hcd->self.root_hub->speed = USB_SPEED_SUPER; | |
cdfcbd2c TB |
2514 | } |
2515 | return 0; | |
2516 | } | |
2517 | ||
1cd8fd28 | 2518 | /* Change a group of bulk endpoints to support multiple stream IDs */ |
d81f3e4f | 2519 | static int dummy_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev, |
1cd8fd28 TB |
2520 | struct usb_host_endpoint **eps, unsigned int num_eps, |
2521 | unsigned int num_streams, gfp_t mem_flags) | |
2522 | { | |
a54c979f SAS |
2523 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
2524 | unsigned long flags; | |
2525 | int max_stream; | |
2526 | int ret_streams = num_streams; | |
2527 | unsigned int index; | |
2528 | unsigned int i; | |
2529 | ||
2530 | if (!num_eps) | |
2531 | return -EINVAL; | |
2532 | ||
2533 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
2534 | for (i = 0; i < num_eps; i++) { | |
2535 | index = dummy_get_ep_idx(&eps[i]->desc); | |
2536 | if ((1 << index) & dum_hcd->stream_en_ep) { | |
2537 | ret_streams = -EINVAL; | |
2538 | goto out; | |
2539 | } | |
2540 | max_stream = usb_ss_max_streams(&eps[i]->ss_ep_comp); | |
2541 | if (!max_stream) { | |
2542 | ret_streams = -EINVAL; | |
2543 | goto out; | |
2544 | } | |
2545 | if (max_stream < ret_streams) { | |
2546 | dev_dbg(dummy_dev(dum_hcd), "Ep 0x%x only supports %u " | |
2547 | "stream IDs.\n", | |
2548 | eps[i]->desc.bEndpointAddress, | |
2549 | max_stream); | |
2550 | ret_streams = max_stream; | |
2551 | } | |
2552 | } | |
2553 | ||
2554 | for (i = 0; i < num_eps; i++) { | |
2555 | index = dummy_get_ep_idx(&eps[i]->desc); | |
2556 | dum_hcd->stream_en_ep |= 1 << index; | |
2557 | set_max_streams_for_pipe(dum_hcd, | |
2558 | usb_endpoint_num(&eps[i]->desc), ret_streams); | |
2559 | } | |
2560 | out: | |
2561 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); | |
2562 | return ret_streams; | |
1cd8fd28 TB |
2563 | } |
2564 | ||
2565 | /* Reverts a group of bulk endpoints back to not using stream IDs. */ | |
d81f3e4f | 2566 | static int dummy_free_streams(struct usb_hcd *hcd, struct usb_device *udev, |
1cd8fd28 TB |
2567 | struct usb_host_endpoint **eps, unsigned int num_eps, |
2568 | gfp_t mem_flags) | |
2569 | { | |
a54c979f SAS |
2570 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
2571 | unsigned long flags; | |
2572 | int ret; | |
2573 | unsigned int index; | |
2574 | unsigned int i; | |
2575 | ||
2576 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
2577 | for (i = 0; i < num_eps; i++) { | |
2578 | index = dummy_get_ep_idx(&eps[i]->desc); | |
2579 | if (!((1 << index) & dum_hcd->stream_en_ep)) { | |
2580 | ret = -EINVAL; | |
2581 | goto out; | |
2582 | } | |
2583 | } | |
2584 | ||
2585 | for (i = 0; i < num_eps; i++) { | |
2586 | index = dummy_get_ep_idx(&eps[i]->desc); | |
2587 | dum_hcd->stream_en_ep &= ~(1 << index); | |
2588 | set_max_streams_for_pipe(dum_hcd, | |
2589 | usb_endpoint_num(&eps[i]->desc), 0); | |
2590 | } | |
2591 | ret = 0; | |
2592 | out: | |
2593 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); | |
2594 | return ret; | |
1cd8fd28 TB |
2595 | } |
2596 | ||
2597 | static struct hc_driver dummy_hcd = { | |
1da177e4 LT |
2598 | .description = (char *) driver_name, |
2599 | .product_desc = "Dummy host controller", | |
cdfcbd2c | 2600 | .hcd_priv_size = sizeof(struct dummy_hcd), |
1da177e4 | 2601 | |
cdfcbd2c | 2602 | .reset = dummy_setup, |
1da177e4 LT |
2603 | .start = dummy_start, |
2604 | .stop = dummy_stop, | |
2605 | ||
18f2cbaa SAS |
2606 | .urb_enqueue = dummy_urb_enqueue, |
2607 | .urb_dequeue = dummy_urb_dequeue, | |
1da177e4 | 2608 | |
18f2cbaa | 2609 | .get_frame_number = dummy_h_get_frame, |
1da177e4 | 2610 | |
18f2cbaa SAS |
2611 | .hub_status_data = dummy_hub_status, |
2612 | .hub_control = dummy_hub_control, | |
0c0382e3 AS |
2613 | .bus_suspend = dummy_bus_suspend, |
2614 | .bus_resume = dummy_bus_resume, | |
1cd8fd28 TB |
2615 | |
2616 | .alloc_streams = dummy_alloc_streams, | |
2617 | .free_streams = dummy_free_streams, | |
1da177e4 LT |
2618 | }; |
2619 | ||
8364d6b0 | 2620 | static int dummy_hcd_probe(struct platform_device *pdev) |
1da177e4 | 2621 | { |
b100a2f3 | 2622 | struct dummy *dum; |
cdfcbd2c | 2623 | struct usb_hcd *hs_hcd; |
1cd8fd28 | 2624 | struct usb_hcd *ss_hcd; |
1da177e4 LT |
2625 | int retval; |
2626 | ||
8364d6b0 | 2627 | dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc); |
b100a2f3 | 2628 | dum = *((void **)dev_get_platdata(&pdev->dev)); |
1da177e4 | 2629 | |
fe659bcc AS |
2630 | if (mod_data.is_super_speed) |
2631 | dummy_hcd.flags = HCD_USB3 | HCD_SHARED; | |
2632 | else if (mod_data.is_high_speed) | |
1cd8fd28 | 2633 | dummy_hcd.flags = HCD_USB2; |
fe659bcc AS |
2634 | else |
2635 | dummy_hcd.flags = HCD_USB11; | |
cdfcbd2c TB |
2636 | hs_hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev)); |
2637 | if (!hs_hcd) | |
1da177e4 | 2638 | return -ENOMEM; |
cdfcbd2c | 2639 | hs_hcd->has_tt = 1; |
1da177e4 | 2640 | |
cdfcbd2c | 2641 | retval = usb_add_hcd(hs_hcd, 0, 0); |
1b68a4ca SAS |
2642 | if (retval) |
2643 | goto put_usb2_hcd; | |
1cd8fd28 TB |
2644 | |
2645 | if (mod_data.is_super_speed) { | |
2646 | ss_hcd = usb_create_shared_hcd(&dummy_hcd, &pdev->dev, | |
2647 | dev_name(&pdev->dev), hs_hcd); | |
2648 | if (!ss_hcd) { | |
2649 | retval = -ENOMEM; | |
2650 | goto dealloc_usb2_hcd; | |
2651 | } | |
2652 | ||
2653 | retval = usb_add_hcd(ss_hcd, 0, 0); | |
2654 | if (retval) | |
2655 | goto put_usb3_hcd; | |
2656 | } | |
2657 | return 0; | |
2658 | ||
2659 | put_usb3_hcd: | |
2660 | usb_put_hcd(ss_hcd); | |
2661 | dealloc_usb2_hcd: | |
1b68a4ca SAS |
2662 | usb_remove_hcd(hs_hcd); |
2663 | put_usb2_hcd: | |
1cd8fd28 | 2664 | usb_put_hcd(hs_hcd); |
b100a2f3 | 2665 | dum->hs_hcd = dum->ss_hcd = NULL; |
1da177e4 LT |
2666 | return retval; |
2667 | } | |
2668 | ||
cdfcbd2c | 2669 | static int dummy_hcd_remove(struct platform_device *pdev) |
1da177e4 | 2670 | { |
cdfcbd2c TB |
2671 | struct dummy *dum; |
2672 | ||
18f2cbaa | 2673 | dum = hcd_to_dummy_hcd(platform_get_drvdata(pdev))->dum; |
1cd8fd28 TB |
2674 | |
2675 | if (dum->ss_hcd) { | |
2676 | usb_remove_hcd(dummy_hcd_to_hcd(dum->ss_hcd)); | |
2677 | usb_put_hcd(dummy_hcd_to_hcd(dum->ss_hcd)); | |
2678 | } | |
2679 | ||
cdfcbd2c TB |
2680 | usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd)); |
2681 | usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd)); | |
1cd8fd28 | 2682 | |
b100a2f3 SAS |
2683 | dum->hs_hcd = NULL; |
2684 | dum->ss_hcd = NULL; | |
1da177e4 | 2685 | |
d9b76251 | 2686 | return 0; |
1da177e4 LT |
2687 | } |
2688 | ||
18f2cbaa | 2689 | static int dummy_hcd_suspend(struct platform_device *pdev, pm_message_t state) |
391eca9d AS |
2690 | { |
2691 | struct usb_hcd *hcd; | |
cdfcbd2c | 2692 | struct dummy_hcd *dum_hcd; |
3cf0a22e | 2693 | int rc = 0; |
391eca9d | 2694 | |
18f2cbaa | 2695 | dev_dbg(&pdev->dev, "%s\n", __func__); |
391eca9d | 2696 | |
18f2cbaa | 2697 | hcd = platform_get_drvdata(pdev); |
cdfcbd2c TB |
2698 | dum_hcd = hcd_to_dummy_hcd(hcd); |
2699 | if (dum_hcd->rh_state == DUMMY_RH_RUNNING) { | |
3cf0a22e AS |
2700 | dev_warn(&pdev->dev, "Root hub isn't suspended!\n"); |
2701 | rc = -EBUSY; | |
2702 | } else | |
2703 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
2704 | return rc; | |
391eca9d AS |
2705 | } |
2706 | ||
18f2cbaa | 2707 | static int dummy_hcd_resume(struct platform_device *pdev) |
391eca9d AS |
2708 | { |
2709 | struct usb_hcd *hcd; | |
2710 | ||
18f2cbaa | 2711 | dev_dbg(&pdev->dev, "%s\n", __func__); |
391eca9d | 2712 | |
18f2cbaa | 2713 | hcd = platform_get_drvdata(pdev); |
3cf0a22e | 2714 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
18f2cbaa | 2715 | usb_hcd_poll_rh_status(hcd); |
391eca9d AS |
2716 | return 0; |
2717 | } | |
2718 | ||
3ae5eaec | 2719 | static struct platform_driver dummy_hcd_driver = { |
d9b76251 AS |
2720 | .probe = dummy_hcd_probe, |
2721 | .remove = dummy_hcd_remove, | |
391eca9d AS |
2722 | .suspend = dummy_hcd_suspend, |
2723 | .resume = dummy_hcd_resume, | |
3ae5eaec RK |
2724 | .driver = { |
2725 | .name = (char *) driver_name, | |
3ae5eaec | 2726 | }, |
d9b76251 | 2727 | }; |
1da177e4 | 2728 | |
d9b76251 | 2729 | /*-------------------------------------------------------------------------*/ |
b100a2f3 | 2730 | #define MAX_NUM_UDC 2 |
b2113136 SAS |
2731 | static struct platform_device *the_udc_pdev[MAX_NUM_UDC]; |
2732 | static struct platform_device *the_hcd_pdev[MAX_NUM_UDC]; | |
1da177e4 | 2733 | |
18f2cbaa | 2734 | static int __init init(void) |
1da177e4 | 2735 | { |
a89a2cd3 | 2736 | int retval = -ENOMEM; |
c7a1db45 | 2737 | int i; |
b100a2f3 | 2738 | struct dummy *dum[MAX_NUM_UDC]; |
1da177e4 | 2739 | |
18f2cbaa | 2740 | if (usb_disabled()) |
1da177e4 | 2741 | return -ENODEV; |
d9b76251 | 2742 | |
7eca4c5a TB |
2743 | if (!mod_data.is_high_speed && mod_data.is_super_speed) |
2744 | return -EINVAL; | |
2745 | ||
c7a1db45 | 2746 | if (mod_data.num < 1 || mod_data.num > MAX_NUM_UDC) { |
fa84acf0 | 2747 | pr_err("Number of emulated UDC must be in range of 1...%d\n", |
c7a1db45 SAS |
2748 | MAX_NUM_UDC); |
2749 | return -EINVAL; | |
2750 | } | |
b100a2f3 | 2751 | |
c7a1db45 SAS |
2752 | for (i = 0; i < mod_data.num; i++) { |
2753 | the_hcd_pdev[i] = platform_device_alloc(driver_name, i); | |
2754 | if (!the_hcd_pdev[i]) { | |
2755 | i--; | |
2756 | while (i >= 0) | |
2757 | platform_device_put(the_hcd_pdev[i--]); | |
2758 | return retval; | |
2759 | } | |
2760 | } | |
2761 | for (i = 0; i < mod_data.num; i++) { | |
2762 | the_udc_pdev[i] = platform_device_alloc(gadget_name, i); | |
2763 | if (!the_udc_pdev[i]) { | |
2764 | i--; | |
2765 | while (i >= 0) | |
2766 | platform_device_put(the_udc_pdev[i--]); | |
2767 | goto err_alloc_udc; | |
2768 | } | |
2769 | } | |
b100a2f3 SAS |
2770 | for (i = 0; i < mod_data.num; i++) { |
2771 | dum[i] = kzalloc(sizeof(struct dummy), GFP_KERNEL); | |
481d3042 WY |
2772 | if (!dum[i]) { |
2773 | retval = -ENOMEM; | |
b100a2f3 | 2774 | goto err_add_pdata; |
481d3042 | 2775 | } |
b100a2f3 SAS |
2776 | retval = platform_device_add_data(the_hcd_pdev[i], &dum[i], |
2777 | sizeof(void *)); | |
2778 | if (retval) | |
2779 | goto err_add_pdata; | |
2780 | retval = platform_device_add_data(the_udc_pdev[i], &dum[i], | |
2781 | sizeof(void *)); | |
2782 | if (retval) | |
2783 | goto err_add_pdata; | |
2784 | } | |
d9b76251 | 2785 | |
a89a2cd3 AS |
2786 | retval = platform_driver_register(&dummy_hcd_driver); |
2787 | if (retval < 0) | |
b100a2f3 | 2788 | goto err_add_pdata; |
a89a2cd3 | 2789 | retval = platform_driver_register(&dummy_udc_driver); |
d9b76251 AS |
2790 | if (retval < 0) |
2791 | goto err_register_udc_driver; | |
2792 | ||
c7a1db45 SAS |
2793 | for (i = 0; i < mod_data.num; i++) { |
2794 | retval = platform_device_add(the_hcd_pdev[i]); | |
2795 | if (retval < 0) { | |
2796 | i--; | |
2797 | while (i >= 0) | |
2798 | platform_device_del(the_hcd_pdev[i--]); | |
2799 | goto err_add_hcd; | |
2800 | } | |
2801 | } | |
b100a2f3 SAS |
2802 | for (i = 0; i < mod_data.num; i++) { |
2803 | if (!dum[i]->hs_hcd || | |
2804 | (!dum[i]->ss_hcd && mod_data.is_super_speed)) { | |
2805 | /* | |
2806 | * The hcd was added successfully but its probe | |
2807 | * function failed for some reason. | |
2808 | */ | |
2809 | retval = -EINVAL; | |
2810 | goto err_add_udc; | |
2811 | } | |
865835fa | 2812 | } |
c7a1db45 | 2813 | |
c7a1db45 SAS |
2814 | for (i = 0; i < mod_data.num; i++) { |
2815 | retval = platform_device_add(the_udc_pdev[i]); | |
2816 | if (retval < 0) { | |
2817 | i--; | |
2818 | while (i >= 0) | |
a79741fd | 2819 | platform_device_del(the_udc_pdev[i--]); |
c7a1db45 SAS |
2820 | goto err_add_udc; |
2821 | } | |
2822 | } | |
2823 | ||
2824 | for (i = 0; i < mod_data.num; i++) { | |
2825 | if (!platform_get_drvdata(the_udc_pdev[i])) { | |
2826 | /* | |
2827 | * The udc was added successfully but its probe | |
2828 | * function failed for some reason. | |
2829 | */ | |
2830 | retval = -EINVAL; | |
2831 | goto err_probe_udc; | |
2832 | } | |
865835fa | 2833 | } |
d9b76251 AS |
2834 | return retval; |
2835 | ||
865835fa | 2836 | err_probe_udc: |
c7a1db45 SAS |
2837 | for (i = 0; i < mod_data.num; i++) |
2838 | platform_device_del(the_udc_pdev[i]); | |
a89a2cd3 | 2839 | err_add_udc: |
c7a1db45 SAS |
2840 | for (i = 0; i < mod_data.num; i++) |
2841 | platform_device_del(the_hcd_pdev[i]); | |
a89a2cd3 AS |
2842 | err_add_hcd: |
2843 | platform_driver_unregister(&dummy_udc_driver); | |
d9b76251 | 2844 | err_register_udc_driver: |
a89a2cd3 | 2845 | platform_driver_unregister(&dummy_hcd_driver); |
b100a2f3 SAS |
2846 | err_add_pdata: |
2847 | for (i = 0; i < mod_data.num; i++) | |
2848 | kfree(dum[i]); | |
c7a1db45 SAS |
2849 | for (i = 0; i < mod_data.num; i++) |
2850 | platform_device_put(the_udc_pdev[i]); | |
a89a2cd3 | 2851 | err_alloc_udc: |
c7a1db45 SAS |
2852 | for (i = 0; i < mod_data.num; i++) |
2853 | platform_device_put(the_hcd_pdev[i]); | |
1da177e4 LT |
2854 | return retval; |
2855 | } | |
18f2cbaa | 2856 | module_init(init); |
1da177e4 | 2857 | |
18f2cbaa | 2858 | static void __exit cleanup(void) |
1da177e4 | 2859 | { |
c7a1db45 SAS |
2860 | int i; |
2861 | ||
2862 | for (i = 0; i < mod_data.num; i++) { | |
b100a2f3 SAS |
2863 | struct dummy *dum; |
2864 | ||
2865 | dum = *((void **)dev_get_platdata(&the_udc_pdev[i]->dev)); | |
2866 | ||
c7a1db45 SAS |
2867 | platform_device_unregister(the_udc_pdev[i]); |
2868 | platform_device_unregister(the_hcd_pdev[i]); | |
b100a2f3 | 2869 | kfree(dum); |
c7a1db45 | 2870 | } |
a89a2cd3 AS |
2871 | platform_driver_unregister(&dummy_udc_driver); |
2872 | platform_driver_unregister(&dummy_hcd_driver); | |
1da177e4 | 2873 | } |
18f2cbaa | 2874 | module_exit(cleanup); |