s390/tty3270: add AID defines

Use AID_* instead of hex numbers to make the code a bit
easier to read. also convert the if/else blocks to a
switch statement in tty3270_read_tasklet().
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

drivers/s390/char/con3270.c

@@ -565,7 +565,8 @@ static void tty3270_read_tasklet(unsigned long data)
 	 */
 	input = NULL;
 	len = 0;
-	if (tp->input->string[0] == 0x7d) {
+	switch (tp->input->string[0]) {
+	case AID_ENTER:
 		/* Enter: write input to tty. */
 		input = tp->input->string + 6;
 		len = tp->input->len - 6 - rrq->rescnt;
@@ -579,10 +580,13 @@ static void tty3270_read_tasklet(unsigned long data)
 		/* Clear input area. */
 		tty3270_update_prompt(tp, NULL, 0);
 		tty3270_set_timer(tp, 1);
-	} else if (tp->input->string[0] == 0x6d) {
+		break;
+	case AID_CLEAR:
 		/* Display has been cleared. Redraw. */
 		tp->update_flags = TTY_UPDATE_ALL;
 		tty3270_set_timer(tp, 1);
+	default:
+		break;
 	}
 	spin_unlock_irq(&tp->view.lock);
 

drivers/s390/char/raw3270.h

@@ -82,6 +82,13 @@
 #define RAW3270_FIRSTMINOR	1	/* First minor number */
 #define RAW3270_MAXDEVS		255	/* Max number of 3270 devices */
 
+#define AID_CLEAR		0x6d
+#define AID_ENTER		0x7d
+#define AID_PF3			0xf3
+#define AID_PF7			0xf7
+#define AID_PF8			0xf8
+#define AID_READ_PARTITION	0x88
+
 /* For TUBGETMOD and TUBSETMOD. Should include. */
 struct raw3270_iocb {
 	short model;