MFp4:

o  Add defines for the 5 interrupt sources typical for serial devices.
   These defines can be used for more finegrained interrupt handling
   between drivers that cooperatively handle multiple serial ports.
o  Add defines for the various bitmasks applicable when all information
   is passed between drivers as a single integral.

1 files changed, 21 insertions, 0 deletions

diff --git a/sys/sys/serial.h b/sys/sys/serial.h
index b2da55d..e8f455e 100644
--- a/sys/sys/serial.h
+++ b/sys/sys/serial.h
@@ -49,6 +49,8 @@
 #define	SER_RI	 	0x0040		/* ring indicate */
 #define	SER_DSR		0x0080		/* data set ready */
 
+#define	SER_MASK_STATE	0x00ff
+
 /* Delta bits, used to indicate which signals should/was affected */
 #define	SER_DELTA(x)	((x) << 8)
 
@@ -61,4 +63,23 @@
 #define	SER_DRI		SER_DELTA(SER_RI)
 #define	SER_DDSR	SER_DELTA(SER_DSR)
 
+#define	SER_MASK_DELTA	SER_DELTA(SER_MASK_STATE)
+
+/*
+ * Specification of interrupt sources typical for serial ports. These are
+ * useful when some umbrella driver like scc(4) has enough knowledge of
+ * the hardware to obtain the set of pending interrupts but does not itself
+ * handle the interrupt. Each interrupt source can be given an interrupt
+ * resource for which inferior drivers can install handlers. The lower 16
+ * bits are kept free for the signals above.
+ */
+#define	SER_INT_OVERRUN	0x010000
+#define	SER_INT_BREAK	0x020000
+#define	SER_INT_RXREADY	0x040000
+#define	SER_INT_SIGCHG	0x080000
+#define	SER_INT_TXIDLE	0x100000
+
+#define	SER_INT_MASK	0xff0000
+#define	SER_INT_SIGMASK	(SER_MASK_DELTA | SER_MASK_STATE)
+
 #endif /* !_SYS_SERIAL_H_ */