IRQ2-4 number to use on mpc83xx?

IRQ2-4 number to use on mpc83xx?

[Tjernlund]

I am trying to figure out what IRQ number I should use for 
external IRQ pins IRQ2-4. Can somebody please drop me a note
on how the IRQ numbering works?

    Jocke 

Re: IRQ2-4 number to use on mpc83xx?

[Andre Schwarz]

I can only tell how I do on MPC834x :

Table 8-6. IVEC/CVEC/MVEC Field Definition

Interrupt ID Number         Interrupt Meaning
17                                           IRQ1
18                                           IRQ2
19                                           IRQ3
20                                           IRQ4
21                                           IRQ5
22                                           IRQ6
23                                           IRQ7
48                                           IRQ0


Given this I can use this dts section for PCI devices connected @ IRQ0
and IRQ1

interrupt-map = <0x5800 0 0 1 &ipic 0x30 0x8
                                 0x6000 0 0 1 &ipic 0x11 0x8
                                 0x6000 0 0 2 &ipic 0x11 0x8>;

You should be able to use IRQ-Nr 18-20 for IRQ2-4.

regards,
Andre

Tjernlund schrieb:
> I am trying to figure out what IRQ number I should use for 
> external IRQ pins IRQ2-4. Can somebody please drop me a note
> on how the IRQ numbering works?
>
>     Jocke 
>
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev
>   


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Re: IRQ2-4 number to use on mpc83xx?

[Joakim Tjernlund]

On Tue, 2008-09-23 at 11:08 +0200, Andre Schwarz wrote:
> I can only tell how I do on MPC834x :
> 
> Table 8-6. IVEC/CVEC/MVEC Field Definition
> 
> Interrupt ID Number         Interrupt Meaning
> 17                                           IRQ1
> 18                                           IRQ2
> 19                                           IRQ3
> 20                                           IRQ4
> 21                                           IRQ5
> 22                                           IRQ6
> 23                                           IRQ7
> 48                                           IRQ0
> 
> 
> Given this I can use this dts section for PCI devices connected @ IRQ0
> and IRQ1
> 
> interrupt-map = <0x5800 0 0 1 &ipic 0x30 0x8
>                                  0x6000 0 0 1 &ipic 0x11 0x8
>                                  0x6000 0 0 2 &ipic 0x11 0x8>;
> 
> You should be able to use IRQ-Nr 18-20 for IRQ2-4.

Yes, that makes sense. Thanks.

 Jocke

Re: IRQ2-4 number to use on mpc83xx?

[Joakim Tjernlund]

On Tue, 2008-09-23 at 13:08 +0200, Joakim Tjernlund wrote:
> On Tue, 2008-09-23 at 11:08 +0200, Andre Schwarz wrote:
> > I can only tell how I do on MPC834x :
> >=20
> > Table 8-6. IVEC/CVEC/MVEC Field Definition
> >=20
> > Interrupt ID Number         Interrupt Meaning
> > 17                                           IRQ1
> > 18                                           IRQ2
> > 19                                           IRQ3
> > 20                                           IRQ4
> > 21                                           IRQ5
> > 22                                           IRQ6
> > 23                                           IRQ7
> > 48                                           IRQ0
> >=20
> >=20
> > Given this I can use this dts section for PCI devices connected @ IRQ0
> > and IRQ1
> >=20
> > interrupt-map =3D <0x5800 0 0 1 &ipic 0x30 0x8
> >                                  0x6000 0 0 1 &ipic 0x11 0x8
> >                                  0x6000 0 0 2 &ipic 0x11 0x8>;
> >=20
> > You should be able to use IRQ-Nr 18-20 for IRQ2-4.
>=20
> Yes, that makes sense. Thanks.
>=20
>  Jocke

OK, finally figured it out, see below, but I get a SEGV if I use=20
=EF=BB=BFIRQ_TYPE_EDGE_FALLING as below. IRQ_TYPE_EDGE_FALLING works.

        info->irq =3D irq_create_mapping(NULL, 19); /* IRQ3 */
	printk(KERN_ERR "IRQ map from %d to %ld\n", 19, info->irq);
	info->irq_flags =3D IRQ_TYPE_EDGE_FALLING;
	pdev =3D platform_device_register_simple("uio_irq", 3, r, 0);
	if (IS_ERR(pdev)) {
		ret =3D PTR_ERR(pdev);
		printk("uio_irq: simple returned :%d\n", ret);
		goto err_out;
	}
	if ((ret =3D uio_register_device(&pdev->dev, info))) {
		printk("uio_register_device: returned :%d\n", ret);
		goto err_out;
	}

The SEGV is in kernel/irq/manage.c, around line 375. Both
desc->chip->enable and desc->chip->startup are NULL:

		if (!(desc->status & IRQ_NOAUTOEN)) {
			desc->depth =3D 0;
			desc->status &=3D ~IRQ_DISABLED;
			if (desc->chip->startup)
				desc->chip->startup(irq);
			else
				desc->chip->enable(irq);
		} else

What am I missing? Kernel is 2.6.25

 Jocke

Re: IRQ2-4 number to use on mpc83xx?

[Joakim Tjernlund]

On Tue, 2008-09-23 at 22:18 +0200, Joakim Tjernlund wrote:
> On Tue, 2008-09-23 at 13:08 +0200, Joakim Tjernlund wrote:
> > On Tue, 2008-09-23 at 11:08 +0200, Andre Schwarz wrote:
> > > I can only tell how I do on MPC834x :
> > >=20
> > > Table 8-6. IVEC/CVEC/MVEC Field Definition
> > >=20
> > > Interrupt ID Number         Interrupt Meaning
> > > 17                                           IRQ1
> > > 18                                           IRQ2
> > > 19                                           IRQ3
> > > 20                                           IRQ4
> > > 21                                           IRQ5
> > > 22                                           IRQ6
> > > 23                                           IRQ7
> > > 48                                           IRQ0
> > >=20
> > >=20
> > > Given this I can use this dts section for PCI devices connected @ IRQ=
0
> > > and IRQ1
> > >=20
> > > interrupt-map =3D <0x5800 0 0 1 &ipic 0x30 0x8
> > >                                  0x6000 0 0 1 &ipic 0x11 0x8
> > >                                  0x6000 0 0 2 &ipic 0x11 0x8>;
> > >=20
> > > You should be able to use IRQ-Nr 18-20 for IRQ2-4.
> >=20
> > Yes, that makes sense. Thanks.
> >=20
> >  Jocke
>=20
> OK, finally figured it out, see below, but I get a SEGV if I use=20
> =EF=BB=BFIRQ_TYPE_EDGE_FALLING as below. IRQ_TYPE_EDGE_FALLING works.

[SNIP]

> What am I missing? Kernel is 2.6.25

I was missing a set_irq_type(info->irq, IRQ_TYPE_EDGE_FALLING)
Works now.

 Jocke