83 lines
2.0 KiB
C
83 lines
2.0 KiB
C
/*
|
|
* bfin_twi.h - interface to Blackfin TWIs
|
|
*
|
|
* Copyright 2005-2010 Analog Devices Inc.
|
|
*
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
#ifndef __ASM_BFIN_TWI_H__
|
|
#define __ASM_BFIN_TWI_H__
|
|
|
|
#include <asm/blackfin.h>
|
|
|
|
#define DEFINE_TWI_REG(reg_name, reg) \
|
|
static inline u16 read_##reg_name(struct bfin_twi_iface *iface) \
|
|
{ return bfin_read16(&iface->regs_base->reg); } \
|
|
static inline void write_##reg_name(struct bfin_twi_iface *iface, u16 v) \
|
|
{ bfin_write16(&iface->regs_base->reg, v); }
|
|
|
|
DEFINE_TWI_REG(CLKDIV, clkdiv)
|
|
DEFINE_TWI_REG(SLAVE_CTL, slave_ctl)
|
|
DEFINE_TWI_REG(SLAVE_STAT, slave_stat)
|
|
DEFINE_TWI_REG(SLAVE_ADDR, slave_addr)
|
|
DEFINE_TWI_REG(MASTER_CTL, master_ctl)
|
|
DEFINE_TWI_REG(MASTER_STAT, master_stat)
|
|
DEFINE_TWI_REG(MASTER_ADDR, master_addr)
|
|
DEFINE_TWI_REG(INT_STAT, int_stat)
|
|
DEFINE_TWI_REG(INT_MASK, int_mask)
|
|
DEFINE_TWI_REG(FIFO_STAT, fifo_stat)
|
|
DEFINE_TWI_REG(XMT_DATA8, xmt_data8)
|
|
DEFINE_TWI_REG(XMT_DATA16, xmt_data16)
|
|
#if !ANOMALY_16000030
|
|
DEFINE_TWI_REG(RCV_DATA8, rcv_data8)
|
|
DEFINE_TWI_REG(RCV_DATA16, rcv_data16)
|
|
#else
|
|
static inline u16 read_RCV_DATA8(struct bfin_twi_iface *iface)
|
|
{
|
|
u16 ret;
|
|
unsigned long flags;
|
|
|
|
flags = hard_local_irq_save();
|
|
ret = bfin_read16(&iface->regs_base->rcv_data8);
|
|
hard_local_irq_restore(flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline u16 read_RCV_DATA16(struct bfin_twi_iface *iface)
|
|
{
|
|
u16 ret;
|
|
unsigned long flags;
|
|
|
|
flags = hard_local_irq_save();
|
|
ret = bfin_read16(&iface->regs_base->rcv_data16);
|
|
hard_local_irq_restore(flags);
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
static inline u16 read_FIFO_CTL(struct bfin_twi_iface *iface)
|
|
{
|
|
return bfin_read16(&iface->regs_base->fifo_ctl);
|
|
}
|
|
|
|
static inline void write_FIFO_CTL(struct bfin_twi_iface *iface, u16 v)
|
|
{
|
|
bfin_write16(&iface->regs_base->fifo_ctl, v);
|
|
SSYNC();
|
|
}
|
|
|
|
static inline u16 read_CONTROL(struct bfin_twi_iface *iface)
|
|
{
|
|
return bfin_read16(&iface->regs_base->control);
|
|
}
|
|
|
|
static inline void write_CONTROL(struct bfin_twi_iface *iface, u16 v)
|
|
{
|
|
SSYNC();
|
|
bfin_write16(&iface->regs_base->control, v);
|
|
}
|
|
#endif
|