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1/*
2 * Copyright (C) 2014 Freescale Semiconductor, Inc.
3 *
4 * Author: Jun Li
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#ifndef __DRIVERS_USB_CHIPIDEA_OTG_FSM_H
12#define __DRIVERS_USB_CHIPIDEA_OTG_FSM_H
13
14#include <linux/usb/otg-fsm.h>
15
16/*
17 *  A-DEVICE timing  constants
18 */
19
20/* Wait for VBUS Rise  */
21#define TA_WAIT_VRISE        (100)	/* a_wait_vrise: section 7.1.2
22					 * a_wait_vrise_tmr: section 7.4.5.1
23					 * TA_VBUS_RISE <= 100ms, section 4.4
24					 * Table 4-1: Electrical Characteristics
25					 * ->DC Electrical Timing
26					 */
27/* Wait for VBUS Fall  */
28#define TA_WAIT_VFALL        (1000)	/* a_wait_vfall: section 7.1.7
29					 * a_wait_vfall_tmr: section: 7.4.5.2
30					 */
31/* Wait for B-Connect */
32#define TA_WAIT_BCON         (10000)	/* a_wait_bcon: section 7.1.3
33					 * TA_WAIT_BCON: should be between 1100
34					 * and 30000 ms, section 5.5, Table 5-1
35					 */
36/* A-Idle to B-Disconnect */
37#define TA_AIDL_BDIS         (5000)	/* a_suspend min 200 ms, section 5.2.1
38					 * TA_AIDL_BDIS: section 5.5, Table 5-1
39					 */
40/* B-Idle to A-Disconnect */
41#define TA_BIDL_ADIS         (500)	/* TA_BIDL_ADIS: section 5.2.1
42					 * 500ms is used for B switch to host
43					 * for safe
44					 */
45
46/*
47 * B-device timing constants
48 */
49
50/* Data-Line Pulse Time*/
51#define TB_DATA_PLS          (10)	/* b_srp_init,continue 5~10ms
52					 * section:5.1.3
53					 */
54/* SRP Fail Time  */
55#define TB_SRP_FAIL          (6000)	/* b_srp_init,fail time 5~6s
56					 * section:5.1.6
57					 */
58/* A-SE0 to B-Reset  */
59#define TB_ASE0_BRST         (155)	/* minimum 155 ms, section:5.3.1 */
60/* SE0 Time Before SRP */
61#define TB_SE0_SRP           (1000)	/* b_idle,minimum 1s, section:5.1.2 */
62/* SSEND time before SRP */
63#define TB_SSEND_SRP         (1500)	/* minimum 1.5 sec, section:5.1.2 */
64
65#define TB_SESS_VLD          (1000)
66
67enum ci_otg_fsm_timer_index {
68	/*
69	 * CI specific timers, start from the end
70	 * of standard and auxiliary OTG timers
71	 */
72	B_DATA_PLS = NUM_OTG_FSM_TIMERS,
73	B_SSEND_SRP,
74	B_SESS_VLD,
75
76	NUM_CI_OTG_FSM_TIMERS,
77};
78
79struct ci_otg_fsm_timer {
80	unsigned long expires;  /* Number of count increase to timeout */
81	unsigned long count;    /* Tick counter */
82	void (*function)(void *, unsigned long);        /* Timeout function */
83	unsigned long data;     /* Data passed to function */
84	struct list_head list;
85};
86
87struct ci_otg_fsm_timer_list {
88	struct ci_otg_fsm_timer *timer_list[NUM_CI_OTG_FSM_TIMERS];
89	struct list_head active_timers;
90};
91
92#ifdef CONFIG_USB_OTG_FSM
93
94int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci);
95int ci_otg_fsm_work(struct ci_hdrc *ci);
96irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci);
97void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci);
98void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci);
99
100#else
101
102static inline int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
103{
104	return 0;
105}
106
107static inline int ci_otg_fsm_work(struct ci_hdrc *ci)
108{
109	return -ENXIO;
110}
111
112static inline irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci)
113{
114	return IRQ_NONE;
115}
116
117static inline void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci)
118{
119
120}
121
122static inline void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci)
123{
124
125}
126
127#endif
128
129#endif /* __DRIVERS_USB_CHIPIDEA_OTG_FSM_H */
130