mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 17:50:54 +07:00
0807c500a1
Slightly reworked and cleaned up driver from Freescale LTIB for MPC5121E. The driver has been ported to the current kernel, proc interface "/proc/driver/fsl_usb2_otg" has been replaced by sysfs interface. Signed-off-by: Li Yang <leoli@freescale.com> Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
155 lines
3.4 KiB
C
155 lines
3.4 KiB
C
/* Copyright (C) 2007,2008 Freescale Semiconductor, Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#undef DEBUG
|
|
#undef VERBOSE
|
|
|
|
#ifdef DEBUG
|
|
#define DBG(fmt, args...) printk(KERN_DEBUG "[%s] " fmt , \
|
|
__func__, ## args)
|
|
#else
|
|
#define DBG(fmt, args...) do {} while (0)
|
|
#endif
|
|
|
|
#ifdef VERBOSE
|
|
#define VDBG DBG
|
|
#else
|
|
#define VDBG(stuff...) do {} while (0)
|
|
#endif
|
|
|
|
#ifdef VERBOSE
|
|
#define MPC_LOC printk("Current Location [%s]:[%d]\n", __FILE__, __LINE__)
|
|
#else
|
|
#define MPC_LOC do {} while (0)
|
|
#endif
|
|
|
|
#define PROTO_UNDEF (0)
|
|
#define PROTO_HOST (1)
|
|
#define PROTO_GADGET (2)
|
|
|
|
/* OTG state machine according to the OTG spec */
|
|
struct otg_fsm {
|
|
/* Input */
|
|
int a_bus_resume;
|
|
int a_bus_suspend;
|
|
int a_conn;
|
|
int a_sess_vld;
|
|
int a_srp_det;
|
|
int a_vbus_vld;
|
|
int b_bus_resume;
|
|
int b_bus_suspend;
|
|
int b_conn;
|
|
int b_se0_srp;
|
|
int b_sess_end;
|
|
int b_sess_vld;
|
|
int id;
|
|
|
|
/* Internal variables */
|
|
int a_set_b_hnp_en;
|
|
int b_srp_done;
|
|
int b_hnp_enable;
|
|
|
|
/* Timeout indicator for timers */
|
|
int a_wait_vrise_tmout;
|
|
int a_wait_bcon_tmout;
|
|
int a_aidl_bdis_tmout;
|
|
int b_ase0_brst_tmout;
|
|
|
|
/* Informative variables */
|
|
int a_bus_drop;
|
|
int a_bus_req;
|
|
int a_clr_err;
|
|
int a_suspend_req;
|
|
int b_bus_req;
|
|
|
|
/* Output */
|
|
int drv_vbus;
|
|
int loc_conn;
|
|
int loc_sof;
|
|
|
|
struct otg_fsm_ops *ops;
|
|
struct otg_transceiver *transceiver;
|
|
|
|
/* Current usb protocol used: 0:undefine; 1:host; 2:client */
|
|
int protocol;
|
|
spinlock_t lock;
|
|
};
|
|
|
|
struct otg_fsm_ops {
|
|
void (*chrg_vbus)(int on);
|
|
void (*drv_vbus)(int on);
|
|
void (*loc_conn)(int on);
|
|
void (*loc_sof)(int on);
|
|
void (*start_pulse)(void);
|
|
void (*add_timer)(void *timer);
|
|
void (*del_timer)(void *timer);
|
|
int (*start_host)(struct otg_fsm *fsm, int on);
|
|
int (*start_gadget)(struct otg_fsm *fsm, int on);
|
|
};
|
|
|
|
|
|
static inline void otg_chrg_vbus(struct otg_fsm *fsm, int on)
|
|
{
|
|
fsm->ops->chrg_vbus(on);
|
|
}
|
|
|
|
static inline void otg_drv_vbus(struct otg_fsm *fsm, int on)
|
|
{
|
|
if (fsm->drv_vbus != on) {
|
|
fsm->drv_vbus = on;
|
|
fsm->ops->drv_vbus(on);
|
|
}
|
|
}
|
|
|
|
static inline void otg_loc_conn(struct otg_fsm *fsm, int on)
|
|
{
|
|
if (fsm->loc_conn != on) {
|
|
fsm->loc_conn = on;
|
|
fsm->ops->loc_conn(on);
|
|
}
|
|
}
|
|
|
|
static inline void otg_loc_sof(struct otg_fsm *fsm, int on)
|
|
{
|
|
if (fsm->loc_sof != on) {
|
|
fsm->loc_sof = on;
|
|
fsm->ops->loc_sof(on);
|
|
}
|
|
}
|
|
|
|
static inline void otg_start_pulse(struct otg_fsm *fsm)
|
|
{
|
|
fsm->ops->start_pulse();
|
|
}
|
|
|
|
static inline void otg_add_timer(struct otg_fsm *fsm, void *timer)
|
|
{
|
|
fsm->ops->add_timer(timer);
|
|
}
|
|
|
|
static inline void otg_del_timer(struct otg_fsm *fsm, void *timer)
|
|
{
|
|
fsm->ops->del_timer(timer);
|
|
}
|
|
|
|
int otg_statemachine(struct otg_fsm *fsm);
|
|
|
|
/* Defined by device specific driver, for different timer implementation */
|
|
extern struct fsl_otg_timer *a_wait_vrise_tmr, *a_wait_bcon_tmr,
|
|
*a_aidl_bdis_tmr, *b_ase0_brst_tmr, *b_se0_srp_tmr, *b_srp_fail_tmr,
|
|
*a_wait_enum_tmr;
|