1/* Copyright (C) 2007,2008 Freescale Semiconductor, Inc. 2 * 3 * This program is free software; you can redistribute it and/or modify it 4 * under the terms of the GNU General Public License as published by the 5 * Free Software Foundation; either version 2 of the License, or (at your 6 * option) any later version. 7 * 8 * This program is distributed in the hope that it will be useful, but 9 * WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 11 * General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License along 14 * with this program; if not, write to the Free Software Foundation, Inc., 15 * 675 Mass Ave, Cambridge, MA 02139, USA. 16 */ 17 18#undef DEBUG 19#undef VERBOSE 20 21#ifdef DEBUG 22#define DBG(fmt, args...) printk(KERN_DEBUG "[%s] " fmt , \ 23 __func__, ## args) 24#else 25#define DBG(fmt, args...) do {} while (0) 26#endif 27 28#ifdef VERBOSE 29#define VDBG DBG 30#else 31#define VDBG(stuff...) do {} while (0) 32#endif 33 34#ifdef VERBOSE 35#define MPC_LOC printk("Current Location [%s]:[%d]\n", __FILE__, __LINE__) 36#else 37#define MPC_LOC do {} while (0) 38#endif 39 40#define PROTO_UNDEF (0) 41#define PROTO_HOST (1) 42#define PROTO_GADGET (2) 43 44/* OTG state machine according to the OTG spec */ 45struct otg_fsm { 46 /* Input */ 47 int a_bus_resume; 48 int a_bus_suspend; 49 int a_conn; 50 int a_sess_vld; 51 int a_srp_det; 52 int a_vbus_vld; 53 int b_bus_resume; 54 int b_bus_suspend; 55 int b_conn; 56 int b_se0_srp; 57 int b_sess_end; 58 int b_sess_vld; 59 int id; 60 61 /* Internal variables */ 62 int a_set_b_hnp_en; 63 int b_srp_done; 64 int b_hnp_enable; 65 66 /* Timeout indicator for timers */ 67 int a_wait_vrise_tmout; 68 int a_wait_bcon_tmout; 69 int a_aidl_bdis_tmout; 70 int b_ase0_brst_tmout; 71 72 /* Informative variables */ 73 int a_bus_drop; 74 int a_bus_req; 75 int a_clr_err; 76 int a_suspend_req; 77 int b_bus_req; 78 79 /* Output */ 80 int drv_vbus; 81 int loc_conn; 82 int loc_sof; 83 84 struct otg_fsm_ops *ops; 85 struct usb_otg *otg; 86 87 /* Current usb protocol used: 0:undefine; 1:host; 2:client */ 88 int protocol; 89 spinlock_t lock; 90}; 91 92struct otg_fsm_ops { 93 void (*chrg_vbus)(int on); 94 void (*drv_vbus)(int on); 95 void (*loc_conn)(int on); 96 void (*loc_sof)(int on); 97 void (*start_pulse)(void); 98 void (*add_timer)(void *timer); 99 void (*del_timer)(void *timer); 100 int (*start_host)(struct otg_fsm *fsm, int on); 101 int (*start_gadget)(struct otg_fsm *fsm, int on); 102}; 103 104 105static inline void otg_chrg_vbus(struct otg_fsm *fsm, int on) 106{ 107 fsm->ops->chrg_vbus(on); 108} 109 110static inline void otg_drv_vbus(struct otg_fsm *fsm, int on) 111{ 112 if (fsm->drv_vbus != on) { 113 fsm->drv_vbus = on; 114 fsm->ops->drv_vbus(on); 115 } 116} 117 118static inline void otg_loc_conn(struct otg_fsm *fsm, int on) 119{ 120 if (fsm->loc_conn != on) { 121 fsm->loc_conn = on; 122 fsm->ops->loc_conn(on); 123 } 124} 125 126static inline void otg_loc_sof(struct otg_fsm *fsm, int on) 127{ 128 if (fsm->loc_sof != on) { 129 fsm->loc_sof = on; 130 fsm->ops->loc_sof(on); 131 } 132} 133 134static inline void otg_start_pulse(struct otg_fsm *fsm) 135{ 136 fsm->ops->start_pulse(); 137} 138 139static inline void otg_add_timer(struct otg_fsm *fsm, void *timer) 140{ 141 fsm->ops->add_timer(timer); 142} 143 144static inline void otg_del_timer(struct otg_fsm *fsm, void *timer) 145{ 146 fsm->ops->del_timer(timer); 147} 148 149int otg_statemachine(struct otg_fsm *fsm); 150 151/* Defined by device specific driver, for different timer implementation */ 152extern struct fsl_otg_timer *a_wait_vrise_tmr, *a_wait_bcon_tmr, 153 *a_aidl_bdis_tmr, *b_ase0_brst_tmr, *b_se0_srp_tmr, *b_srp_fail_tmr, 154 *a_wait_enum_tmr; 155