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#ifndef _LINUX_FIQ_IPC_H
#define _LINUX_FIQ_IPC_H
/*
* this defines the struct which is used to communicate between the FIQ
* world and the normal linux kernel world. One of these structs is
* statically defined for you in the monolithic kernel so the FIQ ISR code
* can safely touch it any any time.
*
* You also want to include this file in your kernel module that wants to
* communicate with your FIQ code. Add any kinds of vars that are used by
* the FIQ ISR and the module in here.
*
* To get you started there is just an int that is incremented every FIQ
* you can remove this when you are ready to customize, but it is useful
* for testing
*/
#include <mach/pwm.h>
#include <plat/regs-timer.h>
extern u8 fiq_ready;
enum hdq_bitbang_states {
HDQB_IDLE = 0,
HDQB_TX_BREAK,
HDQB_TX_BREAK_RECOVERY,
HDQB_ADS_CALC,
HDQB_ADS_LOW,
HDQB_ADS_HIGH,
HDQB_WAIT_RX,
HDQB_DATA_RX_LOW,
HDQB_DATA_RX_HIGH,
HDQB_WAIT_TX,
};
struct fiq_ipc {
/* vibrator */
unsigned long vib_gpio_pin; /* which pin to meddle with */
u8 vib_pwm; /* 0 = OFF -- will ensure GPIO deasserted and stop FIQ */
u8 vib_pwm_latched;
/* hdq */
u8 hdq_probed; /* nonzero after HDQ driver probed */
struct mutex hdq_lock; /* if you want to use hdq, you have to take lock */
unsigned long hdq_gpio_pin; /* GTA02 = GPD14 which pin to meddle with */
u8 hdq_ads; /* b7..b6 = register address, b0 = r/w */
u8 hdq_tx_data; /* data to tx for write action */
u8 hdq_rx_data; /* data received in read action */
u8 hdq_request_ctr; /* incremented by "user" to request a transfer */
u8 hdq_transaction_ctr; /* incremented after each transfer */
u8 hdq_error; /* 0 = no error */
};
/* actual definition lives in arch/arm/mach-s3c2440/fiq_c_isr.c */
extern struct fiq_ipc fiq_ipc;
extern unsigned long _fiq_count_fiqs;
extern void fiq_kick(void); /* provoke a FIQ "immediately" */
#endif /* _LINUX_FIQ_IPC_H */
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