ISDN: New timer handling for ttyI NO CARRIER response

Again, use a per ttyI timer handler for NO CARRIER messages, only
activated when used.

drivers/isdn/i4l/isdn_common.c

@@ -1153,8 +1153,6 @@ isdn_dc2minor(int di, int ch)
 	return -1;
 }
 
-static int isdn_timer_cnt2 = 0;
-
 static void
 isdn_timer_funct(ulong dummy)
 {
@@ -1165,13 +1163,6 @@ isdn_timer_funct(ulong dummy)
 		if (tf & ISDN_TIMER_MODEMXMIT)
 			isdn_tty_modem_xmit();
 	}
-	if (tf & ISDN_TIMER_SLOW) {
-		if (++isdn_timer_cnt2 >= ISDN_TIMER_1SEC) {
-			isdn_timer_cnt2 = 0;
-			if (tf & ISDN_TIMER_CARRIER)
-				isdn_tty_carrier_timeout();
-		}
-	}
 	if (tf) 
 	{
 		unsigned long flags;
@@ -1191,10 +1182,6 @@ isdn_timer_ctrl(int tf, int onoff)
 
 	save_flags(flags);
 	cli();
-	if ((tf & ISDN_TIMER_SLOW) && (!(dev->tflags & ISDN_TIMER_SLOW))) {
-		/* If the slow-timer wasn't activated until now */
-		isdn_timer_cnt2 = 0;
-	}
 	old_tflags = dev->tflags;
 	if (onoff)
 		dev->tflags |= tf;

drivers/isdn/i4l/isdn_tty.c

@@ -29,6 +29,7 @@
 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_connect_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);
@@ -785,9 +786,8 @@ isdn_tty_dial(char *n, modem_info * info, atemu * m)
 		}
 #endif
 		info->dialing = 1;
-		info->emu.carrierwait = 0;
 		isdn_slot_dial(info->isdn_slot, &dial);
-		isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
+		mod_timer(&info->connect_timer, jiffies + info->emu.mdmreg[REG_WAITC] * HZ); 
 	}
 }
 
@@ -974,7 +974,7 @@ isdn_tty_resume(char *id, modem_info * info, atemu * m)
 //		strcpy(dev->num[i], n);
 		isdn_info_update();
 		isdn_slot_command(info->isdn_slot, CAPI_PUT_MESSAGE, &cmd);
-		isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
+		mod_timer(&info->connect_timer, jiffies + info->emu.mdmreg[REG_WAITC] * HZ); 
 	}
 }
 
@@ -2138,6 +2138,9 @@ isdn_tty_init(void)
 		init_timer(&info->ring_timer);
 		info->ring_timer.data = (unsigned long) info;
 		info->ring_timer.function = isdn_tty_ring_timer;
+		init_timer(&info->connect_timer);
+		info->connect_timer.data = (unsigned long) info;
+		info->connect_timer.function = isdn_tty_connect_timer;
 		skb_queue_head_init(&info->rpqueue);
 		info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
 		skb_queue_head_init(&info->xmit_queue);
@@ -3313,9 +3316,8 @@ isdn_tty_cmd_ATA(modem_info * info)
 #endif
 		isdn_slot_command(info->isdn_slot, ISDN_CMD_SETL3, &cmd);
 		info->dialing = 16;
-		info->emu.carrierwait = 0;
 		isdn_slot_command(info->isdn_slot, ISDN_CMD_ACCEPTD, &cmd);
-		isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
+		mod_timer(&info->connect_timer, jiffies + info->emu.mdmreg[REG_WAITC] * HZ); 
 	} else
 		isdn_tty_modem_result(RESULT_NO_ANSWER, info);
 }
@@ -4018,27 +4020,14 @@ isdn_tty_modem_xmit(void)
 	isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
 }
 
-/*
- * Check all channels if we have a 'no carrier' timeout.
- * Timeout value is set by Register S7.
- */
-void
-isdn_tty_carrier_timeout(void)
+static void
+isdn_tty_connect_timer(unsigned long data)
 {
-	int ton = 0;
-	int i;
+	struct modem_info *info = (struct modem_info *) data;
 
-	for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
-		modem_info *info = &isdn_mdm.info[i];
 	if (info->dialing) {
-			if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
 		info->dialing = 0;
 		isdn_tty_modem_result(RESULT_NO_CARRIER, info);
 		isdn_tty_modem_hup(info, 1);
 	}
-			else
-				ton = 1;
-		}
-	}
-	isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
 }

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_carrier_timeout(void);
 extern void isdn_tty_modem_xmit(void);
 extern int isdn_tty_init(void);
 extern void isdn_tty_readmodem(void);

include/linux/isdn.h

@@ -237,13 +237,9 @@ typedef struct {
 
 /* Timer-delays and scheduling-flags */
 #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_MODEMREAD   1
 #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_CARRIER)
 
 /* GLOBAL_FLAGS */
 #define ISDN_GLOBAL_STOPPED 1
@@ -300,7 +296,6 @@ typedef struct atemu {
 	int          mdmcmdl;                    /* Length of Modem-Commandbuffer      */
 	int          pluscount;                  /* Counter for +++ sequence           */
 	int          lastplus;                   /* Timestamp of last +                */
-	int	     carrierwait;                /* Seconds of carrier waiting         */
 	char         mdmcmd[255];                /* Modem-Commandbuffer                */
 	unsigned int charge;                     /* Charge units of current connection */
 } atemu;
@@ -360,6 +355,7 @@ typedef struct modem_info {
   atemu                 emu;             /* AT-emulator data               */
   struct timer_list     escape_timer;    /* to recognize +++ escape        */
   struct timer_list     ring_timer;      /* for writing 'RING' responses   */
+  struct timer_list     connect_timer;   /* waiting for CONNECT            */
   struct termios	normal_termios;  /* For saving termios structs     */
   struct termios	callout_termios;
   wait_queue_head_t	open_wait, close_wait;