sllin: Time to sleep during sending Break is computed depending on baud rate.

diff --git a/sllin/sllin.c b/sllin/sllin.c
index bee3e173346804e2e3a7515c25e364649582a3af..51b501d5aa759b25961cb78866464f6874658a1a 100644 (file)
--- a/sllin/sllin.c
+++ b/sllin/sllin.c
@@ -571,10 +571,13 @@ int sllin_send_break(struct sllin *sl)
 int sllin_send_break(struct sllin *sl)
 {
        struct tty_struct *tty = sl->tty;
-       unsigned long break_baud;
        unsigned long flags;    
        int retval;
+       unsigned long break_baud;
+       unsigned long usleep_range_min;
+       unsigned long usleep_range_max;
 
+       break_baud = ((sl->lin_baud * 2) / 3);
        sl->rx_cnt = SLLIN_BUFF_BREAK;
        sl->rx_expect = SLLIN_BUFF_BREAK + 1;
        sl->lin_state = SLSTATE_BREAK_SENT;
@@ -586,10 +589,14 @@ int sllin_send_break(struct sllin *sl)
                return retval;
 
        //udelay(712);
-       usleep_range(650, 750);
+       usleep_range_min = (1000000l * SLLIN_SAMPLES_PER_CHAR) / break_baud;
+       usleep_range_max = usleep_range_min + 50;
+       usleep_range(usleep_range_min, usleep_range_max);
 
        retval = tty->ops->break_ctl(tty, 0);
-       usleep_range(50, 100);
+       usleep_range_min = (1000000l * 1 /* 1 bit */) / break_baud;
+       usleep_range_max = usleep_range_min + 30;
+       usleep_range(usleep_range_min, usleep_range_max);
        
        tty->ops->flush_buffer(tty);
 
@@ -983,14 +990,12 @@ static int sllin_open(struct tty_struct *tty)
 
                sl->lin_state = SLSTATE_IDLE;
 
-#define SAMPLES_PER_CHAR       10
-#define CHARS_TO_TIMEOUT       12
                hrtimer_init(&sl->rx_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
                sl->rx_timer.function = sllin_rx_timeout_handler;
                /* timeval_to_ktime(msg_head->ival1); */
                sl->rx_timer_timeout = ns_to_ktime(
-                       (1000000000 / sl->lin_baud) * 
-                       SAMPLES_PER_CHAR * CHARS_TO_TIMEOUT); 
+                       (1000000000l / sl->lin_baud) * 
+                       SLLIN_SAMPLES_PER_CHAR * SLLIN_CHARS_TO_TIMEOUT); 
  
                set_bit(SLF_INUSE, &sl->flags);