155 lines
3.4 KiB
C
155 lines
3.4 KiB
C
/* Copyright (C) 2007,2008 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#undef DEBUG
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#undef VERBOSE
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#ifdef DEBUG
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#define DBG(fmt, args...) printk(KERN_DEBUG "[%s] " fmt , \
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__func__, ## args)
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#else
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#define DBG(fmt, args...) do {} while (0)
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#endif
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#ifdef VERBOSE
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#define VDBG DBG
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#else
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#define VDBG(stuff...) do {} while (0)
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#endif
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#ifdef VERBOSE
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#define MPC_LOC printk("Current Location [%s]:[%d]\n", __FILE__, __LINE__)
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#else
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#define MPC_LOC do {} while (0)
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#endif
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#define PROTO_UNDEF (0)
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#define PROTO_HOST (1)
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#define PROTO_GADGET (2)
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/* OTG state machine according to the OTG spec */
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struct otg_fsm {
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/* Input */
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int a_bus_resume;
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int a_bus_suspend;
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int a_conn;
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int a_sess_vld;
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int a_srp_det;
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int a_vbus_vld;
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int b_bus_resume;
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int b_bus_suspend;
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int b_conn;
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int b_se0_srp;
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int b_sess_end;
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int b_sess_vld;
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int id;
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/* Internal variables */
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int a_set_b_hnp_en;
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int b_srp_done;
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int b_hnp_enable;
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/* Timeout indicator for timers */
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int a_wait_vrise_tmout;
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int a_wait_bcon_tmout;
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int a_aidl_bdis_tmout;
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int b_ase0_brst_tmout;
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/* Informative variables */
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int a_bus_drop;
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int a_bus_req;
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int a_clr_err;
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int a_suspend_req;
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int b_bus_req;
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/* Output */
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int drv_vbus;
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int loc_conn;
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int loc_sof;
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struct otg_fsm_ops *ops;
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struct usb_otg *otg;
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/* Current usb protocol used: 0:undefine; 1:host; 2:client */
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int protocol;
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spinlock_t lock;
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};
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struct otg_fsm_ops {
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void (*chrg_vbus)(int on);
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void (*drv_vbus)(int on);
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void (*loc_conn)(int on);
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void (*loc_sof)(int on);
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void (*start_pulse)(void);
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void (*add_timer)(void *timer);
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void (*del_timer)(void *timer);
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int (*start_host)(struct otg_fsm *fsm, int on);
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int (*start_gadget)(struct otg_fsm *fsm, int on);
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};
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static inline void otg_chrg_vbus(struct otg_fsm *fsm, int on)
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{
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fsm->ops->chrg_vbus(on);
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}
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static inline void otg_drv_vbus(struct otg_fsm *fsm, int on)
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{
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if (fsm->drv_vbus != on) {
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fsm->drv_vbus = on;
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fsm->ops->drv_vbus(on);
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}
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}
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static inline void otg_loc_conn(struct otg_fsm *fsm, int on)
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{
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if (fsm->loc_conn != on) {
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fsm->loc_conn = on;
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fsm->ops->loc_conn(on);
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}
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}
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static inline void otg_loc_sof(struct otg_fsm *fsm, int on)
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{
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if (fsm->loc_sof != on) {
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fsm->loc_sof = on;
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fsm->ops->loc_sof(on);
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}
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}
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static inline void otg_start_pulse(struct otg_fsm *fsm)
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{
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fsm->ops->start_pulse();
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}
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static inline void otg_add_timer(struct otg_fsm *fsm, void *timer)
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{
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fsm->ops->add_timer(timer);
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}
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static inline void otg_del_timer(struct otg_fsm *fsm, void *timer)
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{
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fsm->ops->del_timer(timer);
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}
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int otg_statemachine(struct otg_fsm *fsm);
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/* Defined by device specific driver, for different timer implementation */
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extern struct fsl_otg_timer *a_wait_vrise_tmr, *a_wait_bcon_tmr,
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*a_aidl_bdis_tmr, *b_ase0_brst_tmr, *b_se0_srp_tmr, *b_srp_fail_tmr,
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*a_wait_enum_tmr;
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