drivers/usb/chipidea/otg_fsm.h

   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 */