ISDN: New timer handling for ttyI RING response

Again, use a per ttyI timer handler for RING messages, only activated
when used.

drivers/isdn/i4l/isdn_ciscohdlck.c

@@ -226,7 +226,7 @@ isdn_ciscohdlck_connected(isdn_net_dev *idev)
 	cisco->myseq = 0;
 	cisco->mineseen = 0;
 	cisco->yourseq = 0;
-	cisco->keepalive_period = ISDN_TIMER_KEEPINT;
+	cisco->keepalive_period = 10;
 	cisco->last_slarp_in = 0;
 	cisco->line_state = 0;
 	cisco->debserint = 0;

drivers/isdn/i4l/isdn_common.c

@@ -1154,7 +1154,6 @@ isdn_dc2minor(int di, int ch)
 }
 
 static int isdn_timer_cnt2 = 0;
-static int isdn_timer_cnt3 = 0;
 
 static void
 isdn_timer_funct(ulong dummy)
@@ -1169,11 +1168,6 @@ isdn_timer_funct(ulong dummy)
 	if (tf & ISDN_TIMER_SLOW) {
 		if (++isdn_timer_cnt2 >= ISDN_TIMER_1SEC) {
 			isdn_timer_cnt2 = 0;
-			if (++isdn_timer_cnt3 >= ISDN_TIMER_RINGING) {
-				isdn_timer_cnt3 = 0;
-				if (tf & ISDN_TIMER_MODEMRING)
-					isdn_tty_modem_ring();
-			}
 			if (tf & ISDN_TIMER_CARRIER)
 				isdn_tty_carrier_timeout();
 		}

drivers/isdn/i4l/isdn_tty.c

@@ -20,6 +20,7 @@
 #define VBUFX (VBUF/16)
 #endif
 
+#define RING_TIMEOUT     (5*HZ)  /* repeat RING every 5 secs */
 #define FIX_FILE_TRANSFER
 #define	DUMMY_HAYES_AT
 
@@ -27,6 +28,7 @@
 
 static int isdn_tty_edit_at(const char *, int, modem_info *, int);
 static void isdn_tty_escape_timer(unsigned long data);
+static void isdn_tty_ring_timer(unsigned long data);
 static void isdn_tty_check_esc(struct modem_info *info, 
 			       const unsigned char *p, int count);
 static void isdn_tty_modem_reset_regs(modem_info *, int);
@@ -2133,6 +2135,9 @@ isdn_tty_init(void)
 		init_timer(&info->escape_timer);
 		info->escape_timer.data = (unsigned long) info;
 		info->escape_timer.function = isdn_tty_escape_timer;
+		init_timer(&info->ring_timer);
+		info->ring_timer.data = (unsigned long) info;
+		info->ring_timer.function = isdn_tty_ring_timer;
 		skb_queue_head_init(&info->rpqueue);
 		info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
 		skb_queue_head_init(&info->xmit_queue);
@@ -2315,7 +2320,7 @@ isdn_tty_find_icall(struct isdn_slot *slot, setup_parm *setup)
 					       info->line);
 					info->msr |= UART_MSR_RI;
 					isdn_tty_modem_result(RESULT_RING, info);
-					isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
+					mod_timer(&info->ring_timer, jiffies + RING_TIMEOUT);
 					return 1;
 				}
 			}
@@ -3980,25 +3985,16 @@ isdn_tty_edit_at(const char *p, int count, modem_info * info, int user)
 	return total;
 }
 
-/*
- * Put a RING-message to all modem-channels who have the RI-bit set.
- * This function is called every second via timer-interrupt from within
- * timer-dispatcher isdn_timer_function()
- */
-void
-isdn_tty_modem_ring(void)
+static void
+isdn_tty_ring_timer(unsigned long data)
 {
-	int ton = 0;
-	int i;
+	struct modem_info *info = (struct modem_info *) data;
+
+	if (!(info->msr & UART_MSR_RI))
+		return;
 
-	for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
-		modem_info *info = &isdn_mdm.info[i];
-		if (info->msr & UART_MSR_RI) {
-			ton = 1;
 	isdn_tty_modem_result(RESULT_RING, info);
-		}
-	}
-	isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
+	mod_timer(&info->ring_timer, jiffies + RING_TIMEOUT);
 }
 	
 /*

drivers/isdn/i4l/isdn_tty.h

@@ -98,7 +98,6 @@
 	((info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_FAX) && \
 	 (info->emu.mdmreg[REG_L3PROT] == ISDN_PROTO_L3_FCLASS2))
 
-extern void isdn_tty_modem_ring(void);
 extern void isdn_tty_carrier_timeout(void);
 extern void isdn_tty_modem_xmit(void);
 extern int isdn_tty_init(void);

include/linux/isdn.h

@@ -239,14 +239,11 @@ typedef struct {
 #define ISDN_TIMER_RES         4                         /* Main Timer-Resolution   */
 #define ISDN_TIMER_02SEC       (HZ/ISDN_TIMER_RES/5)     /* Slow-Timer1 .2 sec      */
 #define ISDN_TIMER_1SEC        (HZ/ISDN_TIMER_RES)       /* Slow-Timer2 1 sec       */
-#define ISDN_TIMER_RINGING     5 /* tty RINGs = ISDN_TIMER_1SEC * this factor       */
-#define ISDN_TIMER_KEEPINT    10 /* Cisco-Keepalive = ISDN_TIMER_1SEC * this factor */
 #define ISDN_TIMER_MODEMREAD   1
-#define ISDN_TIMER_MODEMRING   4
 #define ISDN_TIMER_MODEMXMIT   8
 #define ISDN_TIMER_CARRIER   256 /* Wait for Carrier */
 #define ISDN_TIMER_FAST      (ISDN_TIMER_MODEMREAD | ISDN_TIMER_MODEMXMIT)
-#define ISDN_TIMER_SLOW      (ISDN_TIMER_MODEMRING | ISDN_TIMER_CARRIER)
+#define ISDN_TIMER_SLOW      (ISDN_TIMER_CARRIER)
 
 /* GLOBAL_FLAGS */
 #define ISDN_GLOBAL_STOPPED 1
@@ -362,6 +359,7 @@ typedef struct modem_info {
   struct tty_struct 	*tty;            /* Pointer to corresponding tty   */
   atemu                 emu;             /* AT-emulator data               */
   struct timer_list     escape_timer;    /* to recognize +++ escape        */
+  struct timer_list     ring_timer;      /* for writing 'RING' responses   */
   struct termios	normal_termios;  /* For saving termios structs     */
   struct termios	callout_termios;
   wait_queue_head_t	open_wait, close_wait;