bennett78 wrote:
> Help, how do I debug timer3 Interrupts? My driver was working and
> then interrupts
Never mind H/W problem...the J27 jumper on the 5200Lite was missing. I
did get a change to
review arch/ppc/kernel/mpc5xxx-pic.c & my interrupt masks settings!
Sorry for the thread interrupt!
Frank Bennett
> stopped coming (most likely blocked). I have a driver that is very
> similar to
> linuxppc_2_4_devel/drivers/char/pp01_ad64.c
> I have attached the complete driver (et.c)
>
> / # insmod et
> ET Display Driver v0.1 loaded ET_TIN irq 16
>
> et_init 00 intr->per_mask 1bfffc00
> et_init 10 intr->ctrl 00c01001
> et_init 14 intr->main_mask 00010e00
> et_init 24 intr->enc_stat 00000001
> et_init 28 intr->crit_stat 00000000
> et_init 2c intr->main_stat 00002000
> et_init 30 intr->per_stat 00000000
> et_init 38 intr->per_error 00000000
>
> / # cat /proc/interrupts
> CPU0
> 16: 0 MPC5xxx Edge et Trubine
> 23: 1049 MPC5xxx Edge eth_xmit
> 24: 2468 MPC5xxx Edge eth_recv
> 39: 51 MPC5xxx Edge serial
> 40: 0 MPC5xxx Edge serial
> 43: 69 MPC5xxx Edge eth_err
> BAD: 0
>
> with a pulse train on timer3 input "et_interrupt" no longer gets
> called.
>
> code snippets
> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> #define ET_TIN 3 // Turbine PULSE IN
>
> static void et_interrupt (int irq, void *dev_id, struct pt_regs * regs)
> {
> int port = ET_IRQ_TO_PORT(irq);
> unsigned long stat;
>
> printk(KERN_INFO "et_interrupt IRQ %d port %d main_stat %x gpt.sr
> %x \n",
> irq, port, intr->main_status, gpt[port].sr );
>
> if( port == ET_TIN ) {
> // Clear pending interrupt
> stat = in_be32(&gpt[port].sr) & 0xffff;
> out_be32(&gpt[port].sr, MPC5xxx_GPT_SR_CAPT);
> printk(KERN_INFO "et_int irq=%d port=%d stat %0lx \n", irq,
> port, stat);
> // wake_up_interruptible(&et_wait);
> } else {
> printk(KERN_ERR ET_MSG "Unexpected IRQ %d received", irq);
> }
> spin_lock (&et_lock);
> turbine_per = in_be32(&gpt[port].sr) >> 16;
> spin_unlock (&et_lock);
> }
>
>
> static int __init et_init (void)
> ....
> if (request_irq(ET_PORT_TO_IRQ(ET_TIN), et_interrupt, 0, "et Trubine",
> NULL)) {
> printk(KERN_ERR ET_MSG "couldn't register interrupts\n");
> goto abort_remove_proc;
> }
> out_be32(&gpt[ET_TIN].cir, ( 66<<16) | 1 ); /* prescale(16),
> period(16) */
> out_be32(&gpt[ET_TIN].emsr,
> MPC5xxx_GPT_EMSR_INP_CAPTURE
> | MPC5xxx_GPT_EMSR_ICT_FALLING
> | MPC5xxx_GPT_EMSR_INT_ENABLE);
> ...
> printk(KERN_INFO "ET Display Driver v%s loaded ET_TIN irq %d\n",
> ET_VERSION, ET_PORT_TO_IRQ(ET_TIN) );
>
> //broke with or without the following
> intr->main_mask &= ~(0x000000ff); /* enable timer ints */
>
> printk(KERN_INFO "et_init 00 intr->per_mask %08x\n", intr->per_mask);
> printk(KERN_INFO "et_init 10 intr->ctrl %08x\n", intr->ctrl);
> printk(KERN_INFO "et_init 14 intr->main_mask %08x\n",
> intr->main_mask);
> printk(KERN_INFO "et_init 24 intr->enc_stat %08x\n",
> intr->enc_status);
> printk(KERN_INFO "et_init 28 intr->crit_stat %08x\n",
> intr->crit_status);
> printk(KERN_INFO "et_init 2c intr->main_stat %08x\n",
> intr->main_status);
> printk(KERN_INFO "et_init 30 intr->per_stat %08x\n",
> intr->per_status);
> printk(KERN_INFO "et_init 38 intr->per_error %08x\n",
> intr->per_error);
>
> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> thanks in advance for any help,
>
> Frank Bennett
>
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