LXR linux/arch/blackfin/include/asm/bfin

   1/*
   2 * bfin_twi.h - interface to Blackfin TWIs
   3 *
   4 * Copyright 2005-2010 Analog Devices Inc.
   5 *
   6 * Licensed under the GPL-2 or later.
   7 */
   8
   9#ifndef __ASM_BFIN_TWI_H__
  10#define __ASM_BFIN_TWI_H__
  11
  12#include <asm/blackfin.h>
  13
  14#define DEFINE_TWI_REG(reg_name, reg) \
  15static inline u16 read_##reg_name(struct bfin_twi_iface *iface) \
  16        { return bfin_read16(&iface->regs_base->reg); } \
  17static inline void write_##reg_name(struct bfin_twi_iface *iface, u16 v) \
  18        { bfin_write16(&iface->regs_base->reg, v); }
  19
  20DEFINE_TWI_REG(CLKDIV, clkdiv)
  21DEFINE_TWI_REG(SLAVE_CTL, slave_ctl)
  22DEFINE_TWI_REG(SLAVE_STAT, slave_stat)
  23DEFINE_TWI_REG(SLAVE_ADDR, slave_addr)
  24DEFINE_TWI_REG(MASTER_CTL, master_ctl)
  25DEFINE_TWI_REG(MASTER_STAT, master_stat)
  26DEFINE_TWI_REG(MASTER_ADDR, master_addr)
  27DEFINE_TWI_REG(INT_STAT, int_stat)
  28DEFINE_TWI_REG(INT_MASK, int_mask)
  29DEFINE_TWI_REG(FIFO_STAT, fifo_stat)
  30DEFINE_TWI_REG(XMT_DATA8, xmt_data8)
  31DEFINE_TWI_REG(XMT_DATA16, xmt_data16)
  32#if !ANOMALY_16000030
  33DEFINE_TWI_REG(RCV_DATA8, rcv_data8)
  34DEFINE_TWI_REG(RCV_DATA16, rcv_data16)
  35#else
  36static inline u16 read_RCV_DATA8(struct bfin_twi_iface *iface)
  37{
  38        u16 ret;
  39        unsigned long flags;
  40
  41        flags = hard_local_irq_save();
  42        ret = bfin_read16(&iface->regs_base->rcv_data8);
  43        hard_local_irq_restore(flags);
  44
  45        return ret;
  46}
  47
  48static inline u16 read_RCV_DATA16(struct bfin_twi_iface *iface)
  49{
  50        u16 ret;
  51        unsigned long flags;
  52
  53        flags = hard_local_irq_save();
  54        ret = bfin_read16(&iface->regs_base->rcv_data16);
  55        hard_local_irq_restore(flags);
  56
  57        return ret;
  58}
  59#endif
  60
  61static inline u16 read_FIFO_CTL(struct bfin_twi_iface *iface)
  62{
  63        return bfin_read16(&iface->regs_base->fifo_ctl);
  64}
  65
  66static inline void write_FIFO_CTL(struct bfin_twi_iface *iface, u16 v)
  67{
  68        bfin_write16(&iface->regs_base->fifo_ctl, v);
  69        SSYNC();
  70}
  71
  72static inline u16 read_CONTROL(struct bfin_twi_iface *iface)
  73{
  74        return bfin_read16(&iface->regs_base->control);
  75}
  76
  77static inline void write_CONTROL(struct bfin_twi_iface *iface, u16 v)
  78{
  79        SSYNC();
  80        bfin_write16(&iface->regs_base->control, v);
  81}
  82#endif
  83