LXR linux/drivers/usb/chipidea/otg

   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
  67enum 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
  79struct 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
  87struct 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
  94int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci);
  95int ci_otg_fsm_work(struct ci_hdrc *ci);
  96irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci);
  97void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci);
  98void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci);
  99
 100#else
 101
 102static inline int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
 103{
 104        return 0;
 105}
 106
 107static inline int ci_otg_fsm_work(struct ci_hdrc *ci)
 108{
 109        return -ENXIO;
 110}
 111
 112static inline irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci)
 113{
 114        return IRQ_NONE;
 115}
 116
 117static inline void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci)
 118{
 119
 120}
 121
 122static 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 */
 130