1 // SPDX-License-Identifier: GPL-2.0+
18 					 * Table:6-4
23 					 * Table:6-5
29 	/* Standard OTG timers */
38 	/* Auxiliary timers */
49  * struct otg_fsm - OTG state machine according to the OTG spec
54  * @id:		TRUE for B-device, FALSE for A-device.
56  *		ADP measurement taken at n-2, differs by more than CADP_THR
60  *	A-Device state inputs
61  * @a_srp_det:	TRUE if the A-device detects SRP
63  * @b_conn:	TRUE if the A-device detects connection from the B-device
64  * @a_bus_resume: TRUE when the B-device detects that the A-device is signaling
66  *	B-Device state inputs
67  * @a_bus_suspend: TRUE when the B-device detects that the A-device has put the
69  * @a_conn:	TRUE if the B-device detects a connection from the A-device
74  * @b_sess_vld:	TRUE when the B-device detects that the voltage on VBUS is
76  * @test_device: TRUE when the B-device switches to B-Host and detects an OTG
79  *	Application inputs (A-Device)
80  * @a_bus_drop:	TRUE when A-device application needs to power down the bus
81  * @a_bus_req:	TRUE when A-device application wants to use the bus.
84  *	Application inputs (B-Device)
86  *		B-device wants to use the bus
89  * @a_sess_vld:	TRUE if the A-device detects that VBUS is above VA_SESS_VLD
90  * @b_bus_suspend: TRUE when the A-device detects that the B-device has put
92  * @b_bus_resume: TRUE when the A-device detects that the B-device is signaling
99  * @drv_vbus:	TRUE when A-device is driving VBUS
100  * @loc_conn:	TRUE when the local device has signaled that it is connected
102  * @loc_sof:	TRUE when the local device is generating activity on the bus
103  * @adp_prb:	TRUE when the local device is in the process of doing
106  *	Outputs for B-device state
107  * @adp_sns:	TRUE when the B-device is in the process of carrying out
109  * @data_pulse: TRUE when the B-device is performing data line pulsing
113  * a_set_b_hnp_en: TRUE when the A-device has successfully set the
114  *		b_hnp_enable bit in the B-device.
115  *		   Unused as OTG fsm uses otg->host->b_hnp_enable instead
116  * b_srp_done:	TRUE when the B-device has completed initiating SRP
117  * b_hnp_enable: TRUE when the B-device has accepted the
118  *		SetFeature(b_hnp_enable) B-device.
119  *		Unused as OTG fsm uses otg->gadget->b_hnp_enable instead
121  *		overcurrent condition and causes the A-device to transition
170 	/* Timeout indicator for timers */
207 	if (!fsm->ops->chrg_vbus)  in otg_chrg_vbus()
208 		return -EOPNOTSUPP;  in otg_chrg_vbus()
209 	fsm->ops->chrg_vbus(fsm, on);  in otg_chrg_vbus()
215 	if (!fsm->ops->drv_vbus)  in otg_drv_vbus()
216 		return -EOPNOTSUPP;  in otg_drv_vbus()
217 	if (fsm->drv_vbus != on) {  in otg_drv_vbus()
218 		fsm->drv_vbus = on;  in otg_drv_vbus()
219 		fsm->ops->drv_vbus(fsm, on);  in otg_drv_vbus()
226 	if (!fsm->ops->loc_conn)  in otg_loc_conn()
227 		return -EOPNOTSUPP;  in otg_loc_conn()
228 	if (fsm->loc_conn != on) {  in otg_loc_conn()
229 		fsm->loc_conn = on;  in otg_loc_conn()
230 		fsm->ops->loc_conn(fsm, on);  in otg_loc_conn()
237 	if (!fsm->ops->loc_sof)  in otg_loc_sof()
238 		return -EOPNOTSUPP;  in otg_loc_sof()
239 	if (fsm->loc_sof != on) {  in otg_loc_sof()
240 		fsm->loc_sof = on;  in otg_loc_sof()
241 		fsm->ops->loc_sof(fsm, on);  in otg_loc_sof()
248 	if (!fsm->ops->start_pulse)  in otg_start_pulse()
249 		return -EOPNOTSUPP;  in otg_start_pulse()
250 	if (!fsm->data_pulse) {  in otg_start_pulse()
251 		fsm->data_pulse = 1;  in otg_start_pulse()
252 		fsm->ops->start_pulse(fsm);  in otg_start_pulse()
259 	if (!fsm->ops->start_adp_prb)  in otg_start_adp_prb()
260 		return -EOPNOTSUPP;  in otg_start_adp_prb()
261 	if (!fsm->adp_prb) {  in otg_start_adp_prb()
262 		fsm->adp_sns = 0;  in otg_start_adp_prb()
263 		fsm->adp_prb = 1;  in otg_start_adp_prb()
264 		fsm->ops->start_adp_prb(fsm);  in otg_start_adp_prb()
271 	if (!fsm->ops->start_adp_sns)  in otg_start_adp_sns()
272 		return -EOPNOTSUPP;  in otg_start_adp_sns()
273 	if (!fsm->adp_sns) {  in otg_start_adp_sns()
274 		fsm->adp_sns = 1;  in otg_start_adp_sns()
275 		fsm->ops->start_adp_sns(fsm);  in otg_start_adp_sns()
282 	if (!fsm->ops->add_timer)  in otg_add_timer()
283 		return -EOPNOTSUPP;  in otg_add_timer()
284 	fsm->ops->add_timer(fsm, timer);  in otg_add_timer()
290 	if (!fsm->ops->del_timer)  in otg_del_timer()
291 		return -EOPNOTSUPP;  in otg_del_timer()
292 	fsm->ops->del_timer(fsm, timer);  in otg_del_timer()
298 	if (!fsm->ops->start_host)  in otg_start_host()
299 		return -EOPNOTSUPP;  in otg_start_host()
300 	return fsm->ops->start_host(fsm, on);  in otg_start_host()
305 	if (!fsm->ops->start_gadget)  in otg_start_gadget()
306 		return -EOPNOTSUPP;  in otg_start_gadget()
307 	return fsm->ops->start_gadget(fsm, on);  in otg_start_gadget()