Commit | Line | Data |
---|---|---|
0807c500 LY |
1 | /* |
2 | * OTG Finite State Machine from OTG spec | |
3 | * | |
4 | * Copyright (C) 2007,2008 Freescale Semiconductor, Inc. | |
5 | * | |
6 | * Author: Li Yang <LeoLi@freescale.com> | |
7 | * Jerry Huang <Chang-Ming.Huang@freescale.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2 of the License, or (at your | |
12 | * option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | */ | |
23 | ||
ea1d39a3 | 24 | #include <linux/module.h> |
0807c500 LY |
25 | #include <linux/kernel.h> |
26 | #include <linux/types.h> | |
16e569e9 | 27 | #include <linux/mutex.h> |
0807c500 LY |
28 | #include <linux/delay.h> |
29 | #include <linux/usb.h> | |
30 | #include <linux/usb/gadget.h> | |
31 | #include <linux/usb/otg.h> | |
5653668c | 32 | #include <linux/usb/otg-fsm.h> |
0807c500 LY |
33 | |
34 | /* Change USB protocol when there is a protocol change */ | |
35 | static int otg_set_protocol(struct otg_fsm *fsm, int protocol) | |
36 | { | |
37 | int ret = 0; | |
38 | ||
39 | if (fsm->protocol != protocol) { | |
40 | VDBG("Changing role fsm->protocol= %d; new protocol= %d\n", | |
41 | fsm->protocol, protocol); | |
42 | /* stop old protocol */ | |
43 | if (fsm->protocol == PROTO_HOST) | |
425d7101 | 44 | ret = otg_start_host(fsm, 0); |
0807c500 | 45 | else if (fsm->protocol == PROTO_GADGET) |
425d7101 | 46 | ret = otg_start_gadget(fsm, 0); |
0807c500 LY |
47 | if (ret) |
48 | return ret; | |
49 | ||
50 | /* start new protocol */ | |
51 | if (protocol == PROTO_HOST) | |
425d7101 | 52 | ret = otg_start_host(fsm, 1); |
0807c500 | 53 | else if (protocol == PROTO_GADGET) |
425d7101 | 54 | ret = otg_start_gadget(fsm, 1); |
0807c500 LY |
55 | if (ret) |
56 | return ret; | |
57 | ||
58 | fsm->protocol = protocol; | |
59 | return 0; | |
60 | } | |
61 | ||
62 | return 0; | |
63 | } | |
64 | ||
0807c500 | 65 | /* Called when leaving a state. Do state clean up jobs here */ |
7410f172 | 66 | static void otg_leave_state(struct otg_fsm *fsm, enum usb_otg_state old_state) |
0807c500 LY |
67 | { |
68 | switch (old_state) { | |
69 | case OTG_STATE_B_IDLE: | |
f6de27ee | 70 | otg_del_timer(fsm, B_SE0_SRP); |
0807c500 | 71 | fsm->b_se0_srp = 0; |
ec04996a AT |
72 | fsm->adp_sns = 0; |
73 | fsm->adp_prb = 0; | |
0807c500 LY |
74 | break; |
75 | case OTG_STATE_B_SRP_INIT: | |
ec04996a | 76 | fsm->data_pulse = 0; |
0807c500 LY |
77 | fsm->b_srp_done = 0; |
78 | break; | |
79 | case OTG_STATE_B_PERIPHERAL: | |
ae57e97a LJ |
80 | if (fsm->otg->gadget) |
81 | fsm->otg->gadget->host_request_flag = 0; | |
0807c500 LY |
82 | break; |
83 | case OTG_STATE_B_WAIT_ACON: | |
f6de27ee | 84 | otg_del_timer(fsm, B_ASE0_BRST); |
0807c500 LY |
85 | fsm->b_ase0_brst_tmout = 0; |
86 | break; | |
87 | case OTG_STATE_B_HOST: | |
88 | break; | |
89 | case OTG_STATE_A_IDLE: | |
ec04996a | 90 | fsm->adp_prb = 0; |
0807c500 LY |
91 | break; |
92 | case OTG_STATE_A_WAIT_VRISE: | |
f6de27ee | 93 | otg_del_timer(fsm, A_WAIT_VRISE); |
0807c500 LY |
94 | fsm->a_wait_vrise_tmout = 0; |
95 | break; | |
96 | case OTG_STATE_A_WAIT_BCON: | |
f6de27ee | 97 | otg_del_timer(fsm, A_WAIT_BCON); |
0807c500 LY |
98 | fsm->a_wait_bcon_tmout = 0; |
99 | break; | |
100 | case OTG_STATE_A_HOST: | |
f6de27ee | 101 | otg_del_timer(fsm, A_WAIT_ENUM); |
0807c500 LY |
102 | break; |
103 | case OTG_STATE_A_SUSPEND: | |
f6de27ee | 104 | otg_del_timer(fsm, A_AIDL_BDIS); |
0807c500 | 105 | fsm->a_aidl_bdis_tmout = 0; |
cff4dab4 | 106 | fsm->a_suspend_req_inf = 0; |
0807c500 LY |
107 | break; |
108 | case OTG_STATE_A_PERIPHERAL: | |
3294908b AT |
109 | otg_del_timer(fsm, A_BIDL_ADIS); |
110 | fsm->a_bidl_adis_tmout = 0; | |
ae57e97a LJ |
111 | if (fsm->otg->gadget) |
112 | fsm->otg->gadget->host_request_flag = 0; | |
0807c500 LY |
113 | break; |
114 | case OTG_STATE_A_WAIT_VFALL: | |
3294908b AT |
115 | otg_del_timer(fsm, A_WAIT_VFALL); |
116 | fsm->a_wait_vfall_tmout = 0; | |
f6de27ee | 117 | otg_del_timer(fsm, A_WAIT_VRISE); |
0807c500 LY |
118 | break; |
119 | case OTG_STATE_A_VBUS_ERR: | |
120 | break; | |
121 | default: | |
122 | break; | |
123 | } | |
124 | } | |
125 | ||
ae57e97a LJ |
126 | static void otg_hnp_polling_work(struct work_struct *work) |
127 | { | |
128 | struct otg_fsm *fsm = container_of(to_delayed_work(work), | |
129 | struct otg_fsm, hnp_polling_work); | |
130 | struct usb_device *udev; | |
131 | enum usb_otg_state state = fsm->otg->state; | |
132 | u8 flag; | |
133 | int retval; | |
134 | ||
135 | if (state != OTG_STATE_A_HOST && state != OTG_STATE_B_HOST) | |
136 | return; | |
137 | ||
138 | udev = usb_hub_find_child(fsm->otg->host->root_hub, 1); | |
139 | if (!udev) { | |
140 | dev_err(fsm->otg->host->controller, | |
141 | "no usb dev connected, can't start HNP polling\n"); | |
142 | return; | |
143 | } | |
144 | ||
145 | *fsm->host_req_flag = 0; | |
146 | /* Get host request flag from connected USB device */ | |
147 | retval = usb_control_msg(udev, | |
148 | usb_rcvctrlpipe(udev, 0), | |
149 | USB_REQ_GET_STATUS, | |
150 | USB_DIR_IN | USB_RECIP_DEVICE, | |
151 | 0, | |
152 | OTG_STS_SELECTOR, | |
153 | fsm->host_req_flag, | |
154 | 1, | |
155 | USB_CTRL_GET_TIMEOUT); | |
156 | if (retval != 1) { | |
157 | dev_err(&udev->dev, "Get one byte OTG status failed\n"); | |
158 | return; | |
159 | } | |
160 | ||
161 | flag = *fsm->host_req_flag; | |
162 | if (flag == 0) { | |
163 | /* Continue HNP polling */ | |
164 | schedule_delayed_work(&fsm->hnp_polling_work, | |
165 | msecs_to_jiffies(T_HOST_REQ_POLL)); | |
166 | return; | |
167 | } else if (flag != HOST_REQUEST_FLAG) { | |
168 | dev_err(&udev->dev, "host request flag %d is invalid\n", flag); | |
169 | return; | |
170 | } | |
171 | ||
172 | /* Host request flag is set */ | |
173 | if (state == OTG_STATE_A_HOST) { | |
174 | /* Set b_hnp_enable */ | |
175 | if (!fsm->otg->host->b_hnp_enable) { | |
176 | retval = usb_control_msg(udev, | |
177 | usb_sndctrlpipe(udev, 0), | |
178 | USB_REQ_SET_FEATURE, 0, | |
179 | USB_DEVICE_B_HNP_ENABLE, | |
180 | 0, NULL, 0, | |
181 | USB_CTRL_SET_TIMEOUT); | |
182 | if (retval >= 0) | |
183 | fsm->otg->host->b_hnp_enable = 1; | |
184 | } | |
185 | fsm->a_bus_req = 0; | |
186 | } else if (state == OTG_STATE_B_HOST) { | |
187 | fsm->b_bus_req = 0; | |
188 | } | |
189 | ||
190 | otg_statemachine(fsm); | |
191 | } | |
192 | ||
193 | static void otg_start_hnp_polling(struct otg_fsm *fsm) | |
194 | { | |
195 | /* | |
196 | * The memory of host_req_flag should be allocated by | |
197 | * controller driver, otherwise, hnp polling is not started. | |
198 | */ | |
199 | if (!fsm->host_req_flag) | |
200 | return; | |
201 | ||
202 | INIT_DELAYED_WORK(&fsm->hnp_polling_work, otg_hnp_polling_work); | |
203 | schedule_delayed_work(&fsm->hnp_polling_work, | |
204 | msecs_to_jiffies(T_HOST_REQ_POLL)); | |
205 | } | |
206 | ||
0807c500 | 207 | /* Called when entering a state */ |
7410f172 | 208 | static int otg_set_state(struct otg_fsm *fsm, enum usb_otg_state new_state) |
0807c500 | 209 | { |
e47d9254 | 210 | if (fsm->otg->state == new_state) |
0807c500 | 211 | return 0; |
42c0bf1c | 212 | VDBG("Set state: %s\n", usb_otg_state_string(new_state)); |
e47d9254 | 213 | otg_leave_state(fsm, fsm->otg->state); |
0807c500 LY |
214 | switch (new_state) { |
215 | case OTG_STATE_B_IDLE: | |
216 | otg_drv_vbus(fsm, 0); | |
217 | otg_chrg_vbus(fsm, 0); | |
218 | otg_loc_conn(fsm, 0); | |
219 | otg_loc_sof(fsm, 0); | |
ec04996a AT |
220 | /* |
221 | * Driver is responsible for starting ADP probing | |
222 | * if ADP sensing times out. | |
223 | */ | |
224 | otg_start_adp_sns(fsm); | |
0807c500 | 225 | otg_set_protocol(fsm, PROTO_UNDEF); |
f6de27ee | 226 | otg_add_timer(fsm, B_SE0_SRP); |
0807c500 LY |
227 | break; |
228 | case OTG_STATE_B_SRP_INIT: | |
229 | otg_start_pulse(fsm); | |
230 | otg_loc_sof(fsm, 0); | |
231 | otg_set_protocol(fsm, PROTO_UNDEF); | |
f6de27ee | 232 | otg_add_timer(fsm, B_SRP_FAIL); |
0807c500 LY |
233 | break; |
234 | case OTG_STATE_B_PERIPHERAL: | |
235 | otg_chrg_vbus(fsm, 0); | |
0807c500 LY |
236 | otg_loc_sof(fsm, 0); |
237 | otg_set_protocol(fsm, PROTO_GADGET); | |
a886bd92 | 238 | otg_loc_conn(fsm, 1); |
0807c500 LY |
239 | break; |
240 | case OTG_STATE_B_WAIT_ACON: | |
241 | otg_chrg_vbus(fsm, 0); | |
242 | otg_loc_conn(fsm, 0); | |
243 | otg_loc_sof(fsm, 0); | |
244 | otg_set_protocol(fsm, PROTO_HOST); | |
f6de27ee | 245 | otg_add_timer(fsm, B_ASE0_BRST); |
0807c500 LY |
246 | fsm->a_bus_suspend = 0; |
247 | break; | |
248 | case OTG_STATE_B_HOST: | |
249 | otg_chrg_vbus(fsm, 0); | |
250 | otg_loc_conn(fsm, 0); | |
251 | otg_loc_sof(fsm, 1); | |
252 | otg_set_protocol(fsm, PROTO_HOST); | |
7e062c0f HK |
253 | usb_bus_start_enum(fsm->otg->host, |
254 | fsm->otg->host->otg_port); | |
ae57e97a | 255 | otg_start_hnp_polling(fsm); |
0807c500 LY |
256 | break; |
257 | case OTG_STATE_A_IDLE: | |
258 | otg_drv_vbus(fsm, 0); | |
259 | otg_chrg_vbus(fsm, 0); | |
260 | otg_loc_conn(fsm, 0); | |
261 | otg_loc_sof(fsm, 0); | |
ec04996a | 262 | otg_start_adp_prb(fsm); |
0807c500 LY |
263 | otg_set_protocol(fsm, PROTO_HOST); |
264 | break; | |
265 | case OTG_STATE_A_WAIT_VRISE: | |
266 | otg_drv_vbus(fsm, 1); | |
267 | otg_loc_conn(fsm, 0); | |
268 | otg_loc_sof(fsm, 0); | |
269 | otg_set_protocol(fsm, PROTO_HOST); | |
f6de27ee | 270 | otg_add_timer(fsm, A_WAIT_VRISE); |
0807c500 LY |
271 | break; |
272 | case OTG_STATE_A_WAIT_BCON: | |
273 | otg_drv_vbus(fsm, 1); | |
274 | otg_loc_conn(fsm, 0); | |
275 | otg_loc_sof(fsm, 0); | |
276 | otg_set_protocol(fsm, PROTO_HOST); | |
f6de27ee | 277 | otg_add_timer(fsm, A_WAIT_BCON); |
0807c500 LY |
278 | break; |
279 | case OTG_STATE_A_HOST: | |
280 | otg_drv_vbus(fsm, 1); | |
281 | otg_loc_conn(fsm, 0); | |
282 | otg_loc_sof(fsm, 1); | |
283 | otg_set_protocol(fsm, PROTO_HOST); | |
284 | /* | |
285 | * When HNP is triggered while a_bus_req = 0, a_host will | |
286 | * suspend too fast to complete a_set_b_hnp_en | |
287 | */ | |
cff4dab4 | 288 | if (!fsm->a_bus_req || fsm->a_suspend_req_inf) |
f6de27ee | 289 | otg_add_timer(fsm, A_WAIT_ENUM); |
ae57e97a | 290 | otg_start_hnp_polling(fsm); |
0807c500 LY |
291 | break; |
292 | case OTG_STATE_A_SUSPEND: | |
293 | otg_drv_vbus(fsm, 1); | |
294 | otg_loc_conn(fsm, 0); | |
295 | otg_loc_sof(fsm, 0); | |
296 | otg_set_protocol(fsm, PROTO_HOST); | |
f6de27ee | 297 | otg_add_timer(fsm, A_AIDL_BDIS); |
0807c500 LY |
298 | |
299 | break; | |
300 | case OTG_STATE_A_PERIPHERAL: | |
0807c500 LY |
301 | otg_loc_sof(fsm, 0); |
302 | otg_set_protocol(fsm, PROTO_GADGET); | |
303 | otg_drv_vbus(fsm, 1); | |
a886bd92 | 304 | otg_loc_conn(fsm, 1); |
3294908b | 305 | otg_add_timer(fsm, A_BIDL_ADIS); |
0807c500 LY |
306 | break; |
307 | case OTG_STATE_A_WAIT_VFALL: | |
308 | otg_drv_vbus(fsm, 0); | |
309 | otg_loc_conn(fsm, 0); | |
310 | otg_loc_sof(fsm, 0); | |
311 | otg_set_protocol(fsm, PROTO_HOST); | |
3294908b | 312 | otg_add_timer(fsm, A_WAIT_VFALL); |
0807c500 LY |
313 | break; |
314 | case OTG_STATE_A_VBUS_ERR: | |
315 | otg_drv_vbus(fsm, 0); | |
316 | otg_loc_conn(fsm, 0); | |
317 | otg_loc_sof(fsm, 0); | |
318 | otg_set_protocol(fsm, PROTO_UNDEF); | |
319 | break; | |
320 | default: | |
321 | break; | |
322 | } | |
323 | ||
e47d9254 | 324 | fsm->otg->state = new_state; |
4e332df6 | 325 | fsm->state_changed = 1; |
0807c500 LY |
326 | return 0; |
327 | } | |
328 | ||
329 | /* State change judgement */ | |
330 | int otg_statemachine(struct otg_fsm *fsm) | |
331 | { | |
332 | enum usb_otg_state state; | |
0807c500 | 333 | |
16e569e9 | 334 | mutex_lock(&fsm->lock); |
0807c500 | 335 | |
e47d9254 | 336 | state = fsm->otg->state; |
4e332df6 | 337 | fsm->state_changed = 0; |
0807c500 LY |
338 | /* State machine state change judgement */ |
339 | ||
340 | switch (state) { | |
341 | case OTG_STATE_UNDEFINED: | |
342 | VDBG("fsm->id = %d\n", fsm->id); | |
343 | if (fsm->id) | |
344 | otg_set_state(fsm, OTG_STATE_B_IDLE); | |
345 | else | |
346 | otg_set_state(fsm, OTG_STATE_A_IDLE); | |
347 | break; | |
348 | case OTG_STATE_B_IDLE: | |
349 | if (!fsm->id) | |
350 | otg_set_state(fsm, OTG_STATE_A_IDLE); | |
7e062c0f | 351 | else if (fsm->b_sess_vld && fsm->otg->gadget) |
0807c500 | 352 | otg_set_state(fsm, OTG_STATE_B_PERIPHERAL); |
ec04996a AT |
353 | else if ((fsm->b_bus_req || fsm->adp_change || fsm->power_up) && |
354 | fsm->b_ssend_srp && fsm->b_se0_srp) | |
0807c500 LY |
355 | otg_set_state(fsm, OTG_STATE_B_SRP_INIT); |
356 | break; | |
357 | case OTG_STATE_B_SRP_INIT: | |
358 | if (!fsm->id || fsm->b_srp_done) | |
359 | otg_set_state(fsm, OTG_STATE_B_IDLE); | |
360 | break; | |
361 | case OTG_STATE_B_PERIPHERAL: | |
362 | if (!fsm->id || !fsm->b_sess_vld) | |
363 | otg_set_state(fsm, OTG_STATE_B_IDLE); | |
7e062c0f | 364 | else if (fsm->b_bus_req && fsm->otg-> |
0807c500 LY |
365 | gadget->b_hnp_enable && fsm->a_bus_suspend) |
366 | otg_set_state(fsm, OTG_STATE_B_WAIT_ACON); | |
367 | break; | |
368 | case OTG_STATE_B_WAIT_ACON: | |
369 | if (fsm->a_conn) | |
370 | otg_set_state(fsm, OTG_STATE_B_HOST); | |
371 | else if (!fsm->id || !fsm->b_sess_vld) | |
372 | otg_set_state(fsm, OTG_STATE_B_IDLE); | |
373 | else if (fsm->a_bus_resume || fsm->b_ase0_brst_tmout) { | |
374 | fsm->b_ase0_brst_tmout = 0; | |
375 | otg_set_state(fsm, OTG_STATE_B_PERIPHERAL); | |
376 | } | |
377 | break; | |
378 | case OTG_STATE_B_HOST: | |
379 | if (!fsm->id || !fsm->b_sess_vld) | |
380 | otg_set_state(fsm, OTG_STATE_B_IDLE); | |
ec04996a | 381 | else if (!fsm->b_bus_req || !fsm->a_conn || fsm->test_device) |
0807c500 LY |
382 | otg_set_state(fsm, OTG_STATE_B_PERIPHERAL); |
383 | break; | |
384 | case OTG_STATE_A_IDLE: | |
385 | if (fsm->id) | |
386 | otg_set_state(fsm, OTG_STATE_B_IDLE); | |
ec04996a AT |
387 | else if (!fsm->a_bus_drop && (fsm->a_bus_req || |
388 | fsm->a_srp_det || fsm->adp_change || fsm->power_up)) | |
0807c500 LY |
389 | otg_set_state(fsm, OTG_STATE_A_WAIT_VRISE); |
390 | break; | |
391 | case OTG_STATE_A_WAIT_VRISE: | |
2284bb35 | 392 | if (fsm->a_vbus_vld) |
0807c500 | 393 | otg_set_state(fsm, OTG_STATE_A_WAIT_BCON); |
2284bb35 LJ |
394 | else if (fsm->id || fsm->a_bus_drop || |
395 | fsm->a_wait_vrise_tmout) | |
396 | otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL); | |
0807c500 LY |
397 | break; |
398 | case OTG_STATE_A_WAIT_BCON: | |
399 | if (!fsm->a_vbus_vld) | |
400 | otg_set_state(fsm, OTG_STATE_A_VBUS_ERR); | |
401 | else if (fsm->b_conn) | |
402 | otg_set_state(fsm, OTG_STATE_A_HOST); | |
66668991 | 403 | else if (fsm->id || fsm->a_bus_drop || fsm->a_wait_bcon_tmout) |
0807c500 LY |
404 | otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL); |
405 | break; | |
406 | case OTG_STATE_A_HOST: | |
8bebbe8d LJ |
407 | if (fsm->id || fsm->a_bus_drop) |
408 | otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL); | |
409 | else if ((!fsm->a_bus_req || fsm->a_suspend_req_inf) && | |
7e062c0f | 410 | fsm->otg->host->b_hnp_enable) |
0807c500 | 411 | otg_set_state(fsm, OTG_STATE_A_SUSPEND); |
8bebbe8d | 412 | else if (!fsm->b_conn) |
0807c500 LY |
413 | otg_set_state(fsm, OTG_STATE_A_WAIT_BCON); |
414 | else if (!fsm->a_vbus_vld) | |
415 | otg_set_state(fsm, OTG_STATE_A_VBUS_ERR); | |
416 | break; | |
417 | case OTG_STATE_A_SUSPEND: | |
7e062c0f | 418 | if (!fsm->b_conn && fsm->otg->host->b_hnp_enable) |
0807c500 | 419 | otg_set_state(fsm, OTG_STATE_A_PERIPHERAL); |
7e062c0f | 420 | else if (!fsm->b_conn && !fsm->otg->host->b_hnp_enable) |
0807c500 LY |
421 | otg_set_state(fsm, OTG_STATE_A_WAIT_BCON); |
422 | else if (fsm->a_bus_req || fsm->b_bus_resume) | |
423 | otg_set_state(fsm, OTG_STATE_A_HOST); | |
424 | else if (fsm->id || fsm->a_bus_drop || fsm->a_aidl_bdis_tmout) | |
425 | otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL); | |
426 | else if (!fsm->a_vbus_vld) | |
427 | otg_set_state(fsm, OTG_STATE_A_VBUS_ERR); | |
428 | break; | |
429 | case OTG_STATE_A_PERIPHERAL: | |
430 | if (fsm->id || fsm->a_bus_drop) | |
431 | otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL); | |
3294908b | 432 | else if (fsm->a_bidl_adis_tmout || fsm->b_bus_suspend) |
0807c500 LY |
433 | otg_set_state(fsm, OTG_STATE_A_WAIT_BCON); |
434 | else if (!fsm->a_vbus_vld) | |
435 | otg_set_state(fsm, OTG_STATE_A_VBUS_ERR); | |
436 | break; | |
437 | case OTG_STATE_A_WAIT_VFALL: | |
8bebbe8d | 438 | if (fsm->a_wait_vfall_tmout) |
0807c500 LY |
439 | otg_set_state(fsm, OTG_STATE_A_IDLE); |
440 | break; | |
441 | case OTG_STATE_A_VBUS_ERR: | |
442 | if (fsm->id || fsm->a_bus_drop || fsm->a_clr_err) | |
443 | otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL); | |
444 | break; | |
445 | default: | |
446 | break; | |
447 | } | |
16da4b17 | 448 | mutex_unlock(&fsm->lock); |
0807c500 | 449 | |
4e332df6 RQ |
450 | VDBG("quit statemachine, changed = %d\n", fsm->state_changed); |
451 | return fsm->state_changed; | |
0807c500 | 452 | } |
be696aac | 453 | EXPORT_SYMBOL_GPL(otg_statemachine); |
ea1d39a3 | 454 | MODULE_LICENSE("GPL"); |