diff options
Diffstat (limited to 'drivers/dahdi/wct4xxp/base.c')
| -rw-r--r-- | drivers/dahdi/wct4xxp/base.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/dahdi/wct4xxp/base.c b/drivers/dahdi/wct4xxp/base.c index c47577a..c91ce59 100644 --- a/drivers/dahdi/wct4xxp/base.c +++ b/drivers/dahdi/wct4xxp/base.c @@ -2786,6 +2786,39 @@ static void __t4_configure_e1(struct t4 *wc, int unit, int lineconfig) wc->numspans, unit + 1, framing, line, crc4); } +/** + * t4_check_for_interrupts - Return 0 if the card is generating interrupts. + * @wc: The card to check. + * + * If the card is not generating interrupts, this function will also place all + * the spans on the card into red alarm. + * + */ +static int t4_check_for_interrupts(struct t4 *wc) +{ + unsigned int starting_intcount = wc->intcount; + unsigned long stop_time = jiffies + HZ*2; + unsigned long flags; + int x; + + msleep(20); + spin_lock_irqsave(&wc->reglock, flags); + while (starting_intcount == wc->intcount) { + spin_unlock_irqrestore(&wc->reglock, flags); + if (time_after(jiffies, stop_time)) { + for (x = 0; x < wc->numspans; x++) + wc->tspans[x]->span.alarms = DAHDI_ALARM_RED; + dev_err(&wc->dev->dev, "Interrupts not detected.\n"); + return -EIO; + } + msleep(100); + spin_lock_irqsave(&wc->reglock, flags); + } + spin_unlock_irqrestore(&wc->reglock, flags); + + return 0; +} + static int t4_startup(struct file *file, struct dahdi_span *span) { #ifdef SUPPORT_GEN1 @@ -2908,6 +2941,11 @@ static int t4_startup(struct file *file, struct dahdi_span *span) "Source\n", span->spanno); } + if (!alreadyrunning) { + if (t4_check_for_interrupts(wc)) + return -EIO; + } + if (debug) dev_info(&wc->dev->dev, "Completed startup!\n"); clear_bit(T4_IGNORE_LATENCY, &wc->checkflag); |