1 files changed, 85 insertions, 0 deletions
diff --git a/sys/dev/ic/ns16550.h b/sys/dev/ic/ns16550.h
index e0a448c..8ad6ab9 100644
--- a/sys/dev/ic/ns16550.h
+++ b/sys/dev/ic/ns16550.h
@@ -49,3 +49,88 @@
 #define	com_lsr		5	/* line status register (R/W) */
 #define	com_msr		6	/* modem status register (R/W) */
 #define	com_scr		7	/* scratch register for 16450 up (R/W) */
+
+/* interrupt enable register */
+#define	IER_ERXRDY	0x1
+#define	IER_ETXRDY	0x2
+#define	IER_ERLS	0x4
+#define	IER_EMSC	0x8
+
+/* interrupt identification register */
+#define	IIR_IMASK	0xf
+#define	IIR_RXTOUT	0xc
+#define	IIR_RLS		0x6
+#define	IIR_RXRDY	0x4
+#define	IIR_TXRDY	0x2
+#define	IIR_NOPEND	0x1
+#define	IIR_MLSC	0x0
+#define	IIR_FIFO_MASK	0xc0	/* set if FIFOs are enabled */
+
+/* fifo control register */
+#define	FIFO_ENABLE	0x01
+#define	FIFO_RCV_RST	0x02
+#define	FIFO_XMT_RST	0x04
+#define	FIFO_DMA_MODE	0x08
+#define	FIFO_RX_LOW	0x00
+#define	FIFO_RX_MEDL	0x40
+#define	FIFO_RX_MEDH	0x80
+#define	FIFO_RX_HIGH	0xc0
+
+/* character format control register (aka line control register) */
+#define	CFCR_DLAB	0x80
+#define	CFCR_SBREAK	0x40
+#define	CFCR_PZERO	0x30
+#define	CFCR_PONE	0x20
+#define	CFCR_PEVEN	0x10
+#define	CFCR_PODD	0x00
+#define	CFCR_PENAB	0x08
+#define	CFCR_STOPB	0x04
+#define	CFCR_8BITS	0x03
+#define	CFCR_7BITS	0x02
+#define	CFCR_6BITS	0x01
+#define	CFCR_5BITS	0x00
+#define	CFCR_EFR_ENABLE	0xbf		/* magic to enable EFR on 16650 up */
+
+/* modem control register */
+#define	MCR_PRESCALE	0x80		/* only available on 16650 up */
+#define	MCR_LOOPBACK	0x10
+#define	MCR_IENABLE	0x08
+#define	MCR_DRS		0x04
+#define	MCR_RTS		0x02
+#define	MCR_DTR		0x01
+
+/* line status register */
+#define	LSR_RCV_FIFO	0x80
+#define	LSR_TSRE	0x40
+#define	LSR_TXRDY	0x20
+#define	LSR_BI		0x10
+#define	LSR_FE		0x08
+#define	LSR_PE		0x04
+#define	LSR_OE		0x02
+#define	LSR_RXRDY	0x01
+#define	LSR_RCV_MASK	0x1f
+
+/* modem status register */
+#define	MSR_DCD		0x80
+#define	MSR_RI		0x40
+#define	MSR_DSR		0x20
+#define	MSR_CTS		0x10
+#define	MSR_DDCD	0x08
+#define	MSR_TERI	0x04
+#define	MSR_DDSR	0x02
+#define	MSR_DCTS	0x01
+
+/* enhanced feature register (only available on 16650 up) */
+#define	com_efr		com_fifo
+#define	EFR_EFE		0x10		/* enhanced functions enable */
+
+#ifdef PC98
+/* Hardware extension mode register for RSB-2000/3000. */
+#define	com_emr		com_msr
+#define	EMR_EXBUFF	0x04
+#define	EMR_CTSFLW	0x08
+#define	EMR_DSRFLW	0x10
+#define	EMR_RTSFLW	0x20
+#define	EMR_DTRFLW	0x40
+#define	EMR_EFMODE	0x80
+#endif