/*
* Intel MID (Langwell/Penwell) USB OTG Transceiver driver
* Copyright (C) 2008 - 2010, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#ifndef __INTEL_MID_OTG_H
#define __INTEL_MID_OTG_H
#include <linux/pm.h>
#include <linux/usb/otg.h>
#include <linux/notifier.h>
struct intel_mid_otg_xceiv;
/* This is a common data structure for Intel MID platform to
* save values of the OTG state machine */
struct otg_hsm {
/* 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_ssend_srp;
int b_sess_end;
int b_sess_vld;
int id;
/* id values */
#define ID_B 0x05
#define ID_A 0x04
#define ID_ACA_C 0x03
#define ID_ACA_B 0x02
#define ID_ACA_A 0x01
int power_up;
int adp_change;
int test_device;
/* Internal variables */
int a_set_b_hnp_en;
int b_srp_done;
int b_hnp_enable;
int hnp_poll_enable;
/* Timeout indicator for timers */
int a_wait_vrise_tmout;
int a_wait_bcon_tmout;
int a_aidl_bdis_tmout;
int a_bidl_adis_tmout;
int a_bidl_adis_tmr;
int a_wait_vfall_tmout;
int b_ase0_brst_tmout;
int b_bus_suspend_tmout;
int b_srp_init_tmout;
int b_srp_fail_tmout;
int b_srp_fail_tmr;
int b_adp_sense_tmout;
/* Informative variables */
int a_bus_drop;
int a_bus_req;
int a_clr_err;
int b_bus_req;
int a_suspend_req;
int b_bus_suspend_vld;
/* Output */
int drv_vbus;
int loc_conn;
int loc_sof;
/* Others */
int vbus_srp_up;
};
/* must provide ULPI access function to read/write registers implemented in
* ULPI address space */
struct iotg_ulpi_access_ops {
int (*read)(struct intel_mid_otg_xceiv *iotg, u8 reg, u8 *val);
int (*write)(struct intel_mid_otg_xceiv *iotg, u8 reg, u8 val);
};
#define OTG_A_DEVICE 0x0
#define OTG_B_DEVICE 0x1
/*
* the Intel MID (Langwell/Penwell) otg transceiver driver needs to interact
* with device and host drivers to implement the USB OTG related feature. More
* function members are added based on otg_transceiver data structure for this
* purpose.
*/
struct intel_mid_otg_xceiv {
struct otg_transceiver otg;
struct otg_hsm hsm;
/* base address */
void __iomem *base;
/* ops to access ulpi */
struct iotg_ulpi_access_ops ulpi_ops;
/* atomic notifier for interrupt context */
struct atomic_notifier_head iotg_notifier;
/* start/stop USB Host function */
int (*start_host)(struct intel_mid_otg_xceiv *iotg);
int (*stop_host)(struct intel_mid_otg_xceiv *iotg);
/* start/stop USB Peripheral function */
int (*start_peripheral)(struct intel_mid_otg_xceiv *iotg);
int (*stop_peripheral)(struct intel_mid_otg_xceiv *iotg);
/* start/stop ADP sense/probe function */
int (*set_adp_probe)(struct intel_mid_otg_xceiv *iotg,
bool enabled, int dev);
int (*set_adp_sense)(struct intel_mid_otg_xceiv *iotg,
bool enabled);
#ifdef CONFIG_PM
/* suspend/resume USB host function */
int (*suspend_host)(struct intel_mid_otg_xceiv *iotg,
pm_message_t message);
int (*resume_host)(struct intel_mid_otg_xceiv *iotg);
int (*suspend_peripheral)(struct intel_mid_otg_xceiv *iotg,
pm_message_t message);
int (*resume_peripheral)(struct intel_mid_otg_xceiv *iotg);
#endif
};
static inline
struct intel_mid_otg_xceiv *otg_to_mid_xceiv(struct otg_transceiver *otg)
{
return container_of(otg, struct intel_mid_otg_xceiv, otg);
}
#define MID_OTG_NOTIFY_CONNECT 0x0001
#define MID_OTG_NOTIFY_DISCONN 0x0002
#define MID_OTG_NOTIFY_HSUSPEND 0x0003
#define MID_OTG_NOTIFY_HRESUME 0x0004
#define MID_OTG_NOTIFY_CSUSPEND 0x0005
#define MID_OTG_NOTIFY_CRESUME 0x0006
#define MID_OTG_NOTIFY_HOSTADD 0x0007
#define MID_OTG_NOTIFY_HOSTREMOVE 0x0008
#define MID_OTG_NOTIFY_CLIENTADD 0x0009
#define MID_OTG_NOTIFY_CLIENTREMOVE 0x000a
static inline int
intel_mid_otg_register_notifier(struct intel_mid_otg_xceiv *iotg,
struct notifier_block *nb)
{
return atomic_notifier_chain_register(&iotg->iotg_notifier, nb);
}
static inline void
intel_mid_otg_unregister_notifier(struct intel_mid_otg_xceiv *iotg,
struct notifier_block *nb)
{
atomic_notifier_chain_unregister(&iotg->iotg_notifier, nb);
}
#endif /* __INTEL_MID_OTG_H */
