1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2014 Freescale Semiconductor, Inc. 4 * 5 * Author: Jun Li 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 12 #ifndef __DRIVERS_USB_CHIPIDEA_OTG_FSM_H 13 #define __DRIVERS_USB_CHIPIDEA_OTG_FSM_H 14 15 #include <linux/usb/otg-fsm.h> 16 17 /* 18 * A-DEVICE timing constants 19 */ 20 21 /* Wait for VBUS Rise */ 22 #define TA_WAIT_VRISE (100) /* a_wait_vrise: section 7.1.2 23 * a_wait_vrise_tmr: section 7.4.5.1 24 * TA_VBUS_RISE <= 100ms, section 4.4 25 * Table 4-1: Electrical Characteristics 26 * ->DC Electrical Timing 27 */ 28 /* Wait for VBUS Fall */ 29 #define TA_WAIT_VFALL (1000) /* a_wait_vfall: section 7.1.7 30 * a_wait_vfall_tmr: section: 7.4.5.2 31 */ 32 /* Wait for B-Connect */ 33 #define TA_WAIT_BCON (10000) /* a_wait_bcon: section 7.1.3 34 * TA_WAIT_BCON: should be between 1100 35 * and 30000 ms, section 5.5, Table 5-1 36 */ 37 /* A-Idle to B-Disconnect */ 38 #define TA_AIDL_BDIS (5000) /* a_suspend min 200 ms, section 5.2.1 39 * TA_AIDL_BDIS: section 5.5, Table 5-1 40 */ 41 /* B-Idle to A-Disconnect */ 42 #define TA_BIDL_ADIS (500) /* TA_BIDL_ADIS: section 5.2.1 43 * 500ms is used for B switch to host 44 * for safe 45 */ 46 47 /* 48 * B-device timing constants 49 */ 50 51 /* Data-Line Pulse Time*/ 52 #define TB_DATA_PLS (10) /* b_srp_init,continue 5~10ms 53 * section:5.1.3 54 */ 55 /* SRP Fail Time */ 56 #define TB_SRP_FAIL (6000) /* b_srp_init,fail time 5~6s 57 * section:5.1.6 58 */ 59 /* A-SE0 to B-Reset */ 60 #define TB_ASE0_BRST (155) /* minimum 155 ms, section:5.3.1 */ 61 /* SE0 Time Before SRP */ 62 #define TB_SE0_SRP (1000) /* b_idle,minimum 1s, section:5.1.2 */ 63 /* SSEND time before SRP */ 64 #define TB_SSEND_SRP (1500) /* minimum 1.5 sec, section:5.1.2 */ 65 66 #define TB_AIDL_BDIS (20) /* 4ms ~ 150ms, section 5.2.1 */ 67 68 #if IS_ENABLED(CONFIG_USB_OTG_FSM) 69 70 int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci); 71 int ci_otg_fsm_work(struct ci_hdrc *ci); 72 irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci); 73 void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci); 74 void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci); 75 76 #else 77 78 static inline int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci) 79 { 80 return 0; 81 } 82 83 static inline int ci_otg_fsm_work(struct ci_hdrc *ci) 84 { 85 return -ENXIO; 86 } 87 88 static inline irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci) 89 { 90 return IRQ_NONE; 91 } 92 93 static inline void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci) 94 { 95 96 } 97 98 static inline void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci) 99 { 100 101 } 102 103 #endif 104 105 #endif /* __DRIVERS_USB_CHIPIDEA_OTG_FSM_H */ 106