1 files changed, 82 insertions, 0 deletions
diff --git a/linux/arch/blackfin/include/asm/bfin_twi.h b/linux/arch/blackfin/include/asm/bfin_twi.h
new file mode 100644
index 00000000..aaa0834d
--- /dev/null
+++ b/linux/arch/blackfin/include/asm/bfin_twi.h
@@ -0,0 +1,82 @@
+/*
+ * 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