drivers/usb/chipidea/otg_fsm.h

   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
  67 enum 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
  79 struct 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
  87 struct 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
  94 int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci);
  95 int ci_otg_fsm_work(struct ci_hdrc *ci);
  96 irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci);
  97 void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci);
  98 void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci);
  99
 100 #else
 101
 102 static inline int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
 103 {
 104         return 0;
 105 }
 106
 107 static inline int ci_otg_fsm_work(struct ci_hdrc *ci)
 108 {
 109         return -ENXIO;
 110 }
 111
 112 static inline irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci)
 113 {
 114         return IRQ_NONE;
 115 }
 116
 117 static inline void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci)
 118 {
 119
 120 }
 121
 122 static 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 */