1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2014 Freescale Semiconductor, Inc.
4 *
5 * Author: Jun Li
6 */
7
8#ifndef __DRIVERS_USB_CHIPIDEA_OTG_FSM_H
9#define __DRIVERS_USB_CHIPIDEA_OTG_FSM_H
10
11#include <linux/usb/otg-fsm.h>
12
13/*
14 * A-DEVICE timing constants
15 */
16
17/* Wait for VBUS Rise */
18#define TA_WAIT_VRISE (100) /* a_wait_vrise: section 7.1.2
19 * a_wait_vrise_tmr: section 7.4.5.1
20 * TA_VBUS_RISE <= 100ms, section 4.4
21 * Table 4-1: Electrical Characteristics
22 * ->DC Electrical Timing
23 */
24/* Wait for VBUS Fall */
25#define TA_WAIT_VFALL (1000) /* a_wait_vfall: section 7.1.7
26 * a_wait_vfall_tmr: section: 7.4.5.2
27 */
28/* Wait for B-Connect */
29#define TA_WAIT_BCON (10000) /* a_wait_bcon: section 7.1.3
30 * TA_WAIT_BCON: should be between 1100
31 * and 30000 ms, section 5.5, Table 5-1
32 */
33/* A-Idle to B-Disconnect */
34#define TA_AIDL_BDIS (5000) /* a_suspend min 200 ms, section 5.2.1
35 * TA_AIDL_BDIS: section 5.5, Table 5-1
36 */
37/* B-Idle to A-Disconnect */
38#define TA_BIDL_ADIS (500) /* TA_BIDL_ADIS: section 5.2.1
39 * 500ms is used for B switch to host
40 * for safe
41 */
42
43/*
44 * B-device timing constants
45 */
46
47/* Data-Line Pulse Time*/
48#define TB_DATA_PLS (10) /* b_srp_init,continue 5~10ms
49 * section:5.1.3
50 */
51/* SRP Fail Time */
52#define TB_SRP_FAIL (6000) /* b_srp_init,fail time 5~6s
53 * section:5.1.6
54 */
55/* A-SE0 to B-Reset */
56#define TB_ASE0_BRST (155) /* minimum 155 ms, section:5.3.1 */
57/* SE0 Time Before SRP */
58#define TB_SE0_SRP (1000) /* b_idle,minimum 1s, section:5.1.2 */
59/* SSEND time before SRP */
60#define TB_SSEND_SRP (1500) /* minimum 1.5 sec, section:5.1.2 */
61
62#define TB_AIDL_BDIS (20) /* 4ms ~ 150ms, section 5.2.1 */
63
64#if IS_ENABLED(CONFIG_USB_OTG_FSM)
65
66int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci);
67int ci_otg_fsm_work(struct ci_hdrc *ci);
68irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci);
69void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci);
70void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci);
71
72#else
73
74static inline int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
75{
76 return 0;
77}
78
79static inline int ci_otg_fsm_work(struct ci_hdrc *ci)
80{
81 return -ENXIO;
82}
83
84static inline irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci)
85{
86 return IRQ_NONE;
87}
88
89static inline void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci)
90{
91
92}
93
94static inline void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci)
95{
96
97}
98
99#endif
100
101#endif /* __DRIVERS_USB_CHIPIDEA_OTG_FSM_H */
102

source code of linux/drivers/usb/chipidea/otg_fsm.h