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 */