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/*
* Copyright STMicroelectronics, 2009.
* Copyright (C) 2009 ST-Ericsson SA
*
* 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
*/
#ifndef __U8500_KPD_H
#define __U8500_KPD_H
#ifndef CONFIG_AUTOSCAN_ENABLED
#define CONFIG_AUTOSCAN_ENABLED 1
#endif
#include <mach/hardware.h>
#include <linux/clk.h>
#define MAX_KPROW 8
#define MAX_KPCOL 8
#define MAX_KEYS (MAX_KPROW * MAX_KPCOL)
/*keypad related Constants*/
#define KEYPAD_RELEASE_PERIOD 11 /*11 msec, repeate key scan time */
#define KEYPAD_SCAN_PERIOD 4 /*4msec for new keypress */
#define KEYPAD_STATE_DEFAULT 0
#define KEYPAD_STATE_PRESSED 1
#define KEYPAD_STATE_PRESSACK 2
#define KEYPAD_STATE_RELEASED 3
#define KEYPAD_STATE_RELEASEACK 2
#define KPINTR_LKBIT 0 /*bit used for interrupt locking */
struct keypad_t;
/**
* struct keypad_device - Device data structure for platform specific data
* @init: pointer to keypad init function
* @exit: pointer to keypad deinitialisation function
* @autoscan_check: pointer to read autoscan status function
* currently
* @autoscan_disable: pointer to autoscan feature disable function,
* not used currently
* @autoscan_results: pointer to read autoscan results function
* @autoscan_en: pointer to enable autoscan feature function
* currently
* @irqen: pointer to enable irq function
* @irqdis: pointer to disable irq function
* @kcode_tbl: lookup table for keycodes
* @krow: mask for available rows, value is 0xFF
* @kcol: mask for available columns, value is 0xFF
* @irqdis_int: pointer to disable irq function, to be called from ISR
* @debounce_period: platform specific debounce time, can be fine tuned later
* @irqtype: type of interrupt
* @irq: irq no,
* @int_status: interrupt status
* @int_line_behaviour: dynamis interrupt line behaviour
* @enable_wakeup: specifies if keypad event can wake up system from sleep
*/
struct keypad_device {
int (*init)(struct keypad_t *kp);
int (*exit)(struct keypad_t *kp);
int (*autoscan_check)(void);
void (*autoscan_disable)(void);
int (*autoscan_results)(struct keypad_t *kp);
void (*autoscan_en)(void);
int (*irqen)(struct keypad_t *kp);
int (*irqdis)(struct keypad_t *kp);
u8 *kcode_tbl;
u8 krow;
u8 kcol;
int (*irqdis_int)(struct keypad_t *kp);
u8 debounce_period;
unsigned long irqtype;
u8 irq;
u8 int_status;
u8 int_line_behaviour;
bool enable_wakeup;
};
/**
* struct keypad_t - keypad data structure used internally by keypad driver
* @irq: irq no
* @mode: 0 for interrupt mode, 1 for polling mode
* @ske_regs: ske regsiters base address
* @cr_lock: spinlock variable
* @key_state: array for saving keystates
* @lockbits: used for synchronisation in ISR
* @inp_dev: pointer to input device object
* @kscan_work: work queue
* @board: keypad platform device
* @key_cnt: count the keys pressed
* @clk: clock structure pointer
*/
struct keypad_t {
int irq;
int mode;
void __iomem *ske_regs;
int key_state[MAX_KPROW][MAX_KPCOL];
unsigned long lockbits;
spinlock_t cr_lock;
struct input_dev *inp_dev;
struct delayed_work kscan_work;
struct keypad_device *board;
int key_cnt;
struct clk *clk;
};
/**
* enum kp_int_status - enum for INTR status
* @KP_INT_DISABLED: interrupt disabled
* @KP_INT_ENABLED: interrupt enabled
*/
enum kp_int_status {
KP_INT_DISABLED = 0,
KP_INT_ENABLED,
};
/**
*enum kp_int_line_behaviour - enum for kp_int_line dynamic status
* @INT_LINE_NOTSET: IRQ not asserted
* @INT_LINE_SET: IRQ asserted
*/
enum kp_int_line_behaviour {
INT_LINE_NOTSET = 0,
INT_LINE_SET,
};
#endif /*__U8500_KPD_H*/
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