xref: /openbmc/linux/drivers/usb/chipidea/otg_fsm.h (revision d9958306)
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 
ci_hdrc_otg_fsm_init(struct ci_hdrc * ci)74 static inline int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
75 {
76 	return 0;
77 }
78 
ci_otg_fsm_work(struct ci_hdrc * ci)79 static inline int ci_otg_fsm_work(struct ci_hdrc *ci)
80 {
81 	return -ENXIO;
82 }
83 
ci_otg_fsm_irq(struct ci_hdrc * ci)84 static inline irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci)
85 {
86 	return IRQ_NONE;
87 }
88 
ci_hdrc_otg_fsm_start(struct ci_hdrc * ci)89 static inline void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci)
90 {
91 
92 }
93 
ci_hdrc_otg_fsm_remove(struct ci_hdrc * ci)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 */
102