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15f75defac
This patch adds sys input to control and show OTG fsm inputs by application, user can do host and preipheral role switch by change these inputs. Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Li Jun <b47624@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
130 lines
3.2 KiB
C
130 lines
3.2 KiB
C
/*
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* Copyright (C) 2014 Freescale Semiconductor, Inc.
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*
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* Author: Jun Li
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __DRIVERS_USB_CHIPIDEA_OTG_FSM_H
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#define __DRIVERS_USB_CHIPIDEA_OTG_FSM_H
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#include <linux/usb/otg-fsm.h>
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/*
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* A-DEVICE timing constants
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*/
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/* Wait for VBUS Rise */
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#define TA_WAIT_VRISE (100) /* a_wait_vrise: section 7.1.2
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* a_wait_vrise_tmr: section 7.4.5.1
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* TA_VBUS_RISE <= 100ms, section 4.4
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* Table 4-1: Electrical Characteristics
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* ->DC Electrical Timing
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*/
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/* Wait for VBUS Fall */
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#define TA_WAIT_VFALL (1000) /* a_wait_vfall: section 7.1.7
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* a_wait_vfall_tmr: section: 7.4.5.2
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*/
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/* Wait for B-Connect */
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#define TA_WAIT_BCON (10000) /* a_wait_bcon: section 7.1.3
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* TA_WAIT_BCON: should be between 1100
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* and 30000 ms, section 5.5, Table 5-1
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*/
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/* A-Idle to B-Disconnect */
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#define TA_AIDL_BDIS (5000) /* a_suspend min 200 ms, section 5.2.1
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* TA_AIDL_BDIS: section 5.5, Table 5-1
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*/
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/* B-Idle to A-Disconnect */
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#define TA_BIDL_ADIS (500) /* TA_BIDL_ADIS: section 5.2.1
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* 500ms is used for B switch to host
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* for safe
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*/
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/*
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* B-device timing constants
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*/
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/* Data-Line Pulse Time*/
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#define TB_DATA_PLS (10) /* b_srp_init,continue 5~10ms
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* section:5.1.3
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*/
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/* SRP Fail Time */
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#define TB_SRP_FAIL (6000) /* b_srp_init,fail time 5~6s
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* section:5.1.6
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*/
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/* A-SE0 to B-Reset */
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#define TB_ASE0_BRST (155) /* minimum 155 ms, section:5.3.1 */
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/* SE0 Time Before SRP */
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#define TB_SE0_SRP (1000) /* b_idle,minimum 1s, section:5.1.2 */
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/* SSEND time before SRP */
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#define TB_SSEND_SRP (1500) /* minimum 1.5 sec, section:5.1.2 */
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#define TB_SESS_VLD (1000)
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enum ci_otg_fsm_timer_index {
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/*
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* CI specific timers, start from the end
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* of standard and auxiliary OTG timers
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*/
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B_DATA_PLS = NUM_OTG_FSM_TIMERS,
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B_SSEND_SRP,
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B_SESS_VLD,
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NUM_CI_OTG_FSM_TIMERS,
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};
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struct ci_otg_fsm_timer {
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unsigned long expires; /* Number of count increase to timeout */
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unsigned long count; /* Tick counter */
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void (*function)(void *, unsigned long); /* Timeout function */
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unsigned long data; /* Data passed to function */
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struct list_head list;
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};
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struct ci_otg_fsm_timer_list {
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struct ci_otg_fsm_timer *timer_list[NUM_CI_OTG_FSM_TIMERS];
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struct list_head active_timers;
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};
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#ifdef CONFIG_USB_OTG_FSM
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int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci);
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int ci_otg_fsm_work(struct ci_hdrc *ci);
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irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci);
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void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci);
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void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci);
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#else
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static inline int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
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{
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return 0;
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}
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static inline int ci_otg_fsm_work(struct ci_hdrc *ci)
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{
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return -ENXIO;
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}
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static inline irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci)
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{
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return IRQ_NONE;
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}
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static inline void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci)
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{
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}
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static inline void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci)
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{
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}
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#endif
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#endif /* __DRIVERS_USB_CHIPIDEA_OTG_FSM_H */
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