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
66 int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci);
67 int ci_otg_fsm_work(struct ci_hdrc *ci);
68 irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci);
69 void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci);
70 void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci);
71
72 #else
73
74 static inline int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
75 {
76 return 0;
77 }
78
79 static inline int ci_otg_fsm_work(struct ci_hdrc *ci)
80 {
81 return -ENXIO;
82 }
83
84 static inline irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci)
85 {
86 return IRQ_NONE;
87 }
88
89 static inline void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci)
90 {
91
92 }
93
94 static 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 */