summaryrefslogtreecommitdiff
path: root/arch/blackfin/include/asm/bfin_twi.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/blackfin/include/asm/bfin_twi.h')
-rw-r--r--arch/blackfin/include/asm/bfin_twi.h70
1 files changed, 70 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/bfin_twi.h b/arch/blackfin/include/asm/bfin_twi.h
index e767d649dfc4..74d10237f706 100644
--- a/arch/blackfin/include/asm/bfin_twi.h
+++ b/arch/blackfin/include/asm/bfin_twi.h
@@ -42,4 +42,74 @@ struct bfin_twi_regs {
#undef __BFP
+/* ******************** TWO-WIRE INTERFACE (TWI) MASKS ***********************/
+/* TWI_CLKDIV Macros (Use: *pTWI_CLKDIV = CLKLOW(x)|CLKHI(y); ) */
+#define CLKLOW(x) ((x) & 0xFF) /* Periods Clock Is Held Low */
+#define CLKHI(y) (((y)&0xFF)<<0x8) /* Periods Before New Clock Low */
+
+/* TWI_PRESCALE Masks */
+#define PRESCALE 0x007F /* SCLKs Per Internal Time Reference (10MHz) */
+#define TWI_ENA 0x0080 /* TWI Enable */
+#define SCCB 0x0200 /* SCCB Compatibility Enable */
+
+/* TWI_SLAVE_CTL Masks */
+#define SEN 0x0001 /* Slave Enable */
+#define SADD_LEN 0x0002 /* Slave Address Length */
+#define STDVAL 0x0004 /* Slave Transmit Data Valid */
+#define NAK 0x0008 /* NAK/ACK* Generated At Conclusion Of Transfer */
+#define GEN 0x0010 /* General Call Address Matching Enabled */
+
+/* TWI_SLAVE_STAT Masks */
+#define SDIR 0x0001 /* Slave Transfer Direction (Transmit/Receive*) */
+#define GCALL 0x0002 /* General Call Indicator */
+
+/* TWI_MASTER_CTL Masks */
+#define MEN 0x0001 /* Master Mode Enable */
+#define MADD_LEN 0x0002 /* Master Address Length */
+#define MDIR 0x0004 /* Master Transmit Direction (RX/TX*) */
+#define FAST 0x0008 /* Use Fast Mode Timing Specs */
+#define STOP 0x0010 /* Issue Stop Condition */
+#define RSTART 0x0020 /* Repeat Start or Stop* At End Of Transfer */
+#define DCNT 0x3FC0 /* Data Bytes To Transfer */
+#define SDAOVR 0x4000 /* Serial Data Override */
+#define SCLOVR 0x8000 /* Serial Clock Override */
+
+/* TWI_MASTER_STAT Masks */
+#define MPROG 0x0001 /* Master Transfer In Progress */
+#define LOSTARB 0x0002 /* Lost Arbitration Indicator (Xfer Aborted) */
+#define ANAK 0x0004 /* Address Not Acknowledged */
+#define DNAK 0x0008 /* Data Not Acknowledged */
+#define BUFRDERR 0x0010 /* Buffer Read Error */
+#define BUFWRERR 0x0020 /* Buffer Write Error */
+#define SDASEN 0x0040 /* Serial Data Sense */
+#define SCLSEN 0x0080 /* Serial Clock Sense */
+#define BUSBUSY 0x0100 /* Bus Busy Indicator */
+
+/* TWI_INT_SRC and TWI_INT_ENABLE Masks */
+#define SINIT 0x0001 /* Slave Transfer Initiated */
+#define SCOMP 0x0002 /* Slave Transfer Complete */
+#define SERR 0x0004 /* Slave Transfer Error */
+#define SOVF 0x0008 /* Slave Overflow */
+#define MCOMP 0x0010 /* Master Transfer Complete */
+#define MERR 0x0020 /* Master Transfer Error */
+#define XMTSERV 0x0040 /* Transmit FIFO Service */
+#define RCVSERV 0x0080 /* Receive FIFO Service */
+
+/* TWI_FIFO_CTRL Masks */
+#define XMTFLUSH 0x0001 /* Transmit Buffer Flush */
+#define RCVFLUSH 0x0002 /* Receive Buffer Flush */
+#define XMTINTLEN 0x0004 /* Transmit Buffer Interrupt Length */
+#define RCVINTLEN 0x0008 /* Receive Buffer Interrupt Length */
+
+/* TWI_FIFO_STAT Masks */
+#define XMTSTAT 0x0003 /* Transmit FIFO Status */
+#define XMT_EMPTY 0x0000 /* Transmit FIFO Empty */
+#define XMT_HALF 0x0001 /* Transmit FIFO Has 1 Byte To Write */
+#define XMT_FULL 0x0003 /* Transmit FIFO Full (2 Bytes To Write) */
+
+#define RCVSTAT 0x000C /* Receive FIFO Status */
+#define RCV_EMPTY 0x0000 /* Receive FIFO Empty */
+#define RCV_HALF 0x0004 /* Receive FIFO Has 1 Byte To Read */
+#define RCV_FULL 0x000C /* Receive FIFO Full (2 Bytes To Read) */
+
#endif