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<tt>Help, how do I debug timer3 Interrupts? My driver was working and
then interrupts <br>
stopped coming (m</tt><tt>ost likely blocked). I have a driver that is
very similar to<br>
linuxppc_2_4_devel/drivers/char/pp01_ad64.c <br>
I have attached the complete driver (et.c)<br>
</tt><tt><br>
/ # insmod et<br>
ET Display Driver v0.1 loaded ET_TIN irq 16<br>
<br>
et_init 00 intr->per_mask 1bfffc00<br>
et_init 10 intr->ctrl 00c01001<br>
et_init 14 intr->main_mask 00010e00<br>
et_init 24 intr->enc_stat 00000001<br>
et_init 28 intr->crit_stat 00000000<br>
et_init 2c intr->main_stat 00002000<br>
et_init 30 intr->per_stat 00000000<br>
et_init 38 intr->per_error 00000000<br>
<br>
/ # cat /proc/interrupts<br>
CPU0<br>
16: 0 MPC5xxx Edge et Trubine<br>
23: 1049 MPC5xxx Edge eth_xmit<br>
24: 2468 MPC5xxx Edge eth_recv<br>
39: 51 MPC5xxx Edge serial<br>
40: 0 MPC5xxx Edge serial<br>
43: 69 MPC5xxx Edge eth_err<br>
BAD: 0<br>
<br>
with a pulse train on timer3 input "et_interrupt" no longer gets<br>
called.<br>
<br>
code snippets<br>
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=<br>
#define ET_TIN 3 // Turbine PULSE IN<br>
<br>
static void et_interrupt (int irq, void *dev_id, struct pt_regs * regs)<br>
{<br>
int port = ET_IRQ_TO_PORT(irq);<br>
unsigned long stat;<br>
<br>
printk(KERN_INFO "et_interrupt IRQ %d port %d main_stat %x gpt.sr
%x \n",<br>
irq, port, intr->main_status, gpt[port].sr );<br>
<br>
if( port == ET_TIN ) {<br>
// Clear pending interrupt<br>
stat = in_be32(&gpt[port].sr) & 0xffff;<br>
out_be32(&gpt[port].sr, MPC5xxx_GPT_SR_CAPT);<br>
printk(KERN_INFO "et_int irq=%d port=%d stat %0lx \n", irq,
port, stat);<br>
// wake_up_interruptible(&et_wait);<br>
} else {<br>
printk(KERN_ERR ET_MSG "Unexpected IRQ %d received", irq);<br>
}<br>
spin_lock (&et_lock);<br>
turbine_per = in_be32(&gpt[port].sr) >> 16;<br>
spin_unlock (&et_lock);<br>
}<br>
<br>
<br>
static int __init et_init (void)<br>
....<br>
if (request_irq(ET_PORT_TO_IRQ(ET_TIN), et_interrupt, 0, "et Trubine",
NULL)) {<br>
printk(KERN_ERR ET_MSG "couldn't register interrupts\n");<br>
goto abort_remove_proc;<br>
}<br>
out_be32(&gpt[ET_TIN].cir, ( 66<<16) | 1 ); /*
prescale(16), period(16) */<br>
out_be32(&gpt[ET_TIN].emsr,<br>
MPC5xxx_GPT_EMSR_INP_CAPTURE <br>
| MPC5xxx_GPT_EMSR_ICT_FALLING <br>
| MPC5xxx_GPT_EMSR_INT_ENABLE);<br>
...<br>
printk(KERN_INFO "ET Display Driver v%s loaded ET_TIN irq %d\n",<br>
ET_VERSION, ET_PORT_TO_IRQ(ET_TIN) );<br>
<br>
//broke with or without the following<br>
intr->main_mask &= ~(0x000000ff); /* enable timer ints */<br>
<br>
printk(KERN_INFO "et_init 00 intr->per_mask %08x\n",
intr->per_mask);<br>
printk(KERN_INFO "et_init 10 intr->ctrl %08x\n",
intr->ctrl);<br>
printk(KERN_INFO "et_init 14 intr->main_mask %08x\n",
intr->main_mask);<br>
printk(KERN_INFO "et_init 24 intr->enc_stat %08x\n",
intr->enc_status);<br>
printk(KERN_INFO "et_init 28 intr->crit_stat %08x\n",
intr->crit_status);<br>
printk(KERN_INFO "et_init 2c intr->main_stat %08x\n",
intr->main_status);<br>
printk(KERN_INFO "et_init 30 intr->per_stat %08x\n",
intr->per_status);<br>
printk(KERN_INFO "et_init 38 intr->per_error %08x\n",
intr->per_error);<br>
<br>
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=<br>
thanks in advance for any help,</tt><br>
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<span style="font-style: italic; font-weight: bold;">Frank Bennett</span><br>
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