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 */ 102