From: "S. Fricke" <silvio.fricke@googlemail.com>
To: linuxppc-embedded@ozlabs.org
Subject: Interrupt-problem mpc5200
Date: Mon, 10 Sep 2007 11:03:05 +0200 [thread overview]
Message-ID: <20070910090305.GG11807@sfrouter> (raw)
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Hello all.
What are the steps to configure an MPC500B-Board to react on an IRQ (2)?
I have written a test-driver with this code-snippets, but the prozessor
hangs when loading the driver.
my __init-function looks like:
static int __init mod_init( void )
{
volatile static struct mpc52xx_intr __iomem *intr;
u32 intr_ctrl;
// ...
printk( "intmod.ko: interrupt init ");
if (request_irq(MPC52xx_IRQ2, intmod_isr, IRQF_SHARED , "intmod",
INTMOD_IRQ_BOARD) == -EBUSY)
printk("KO\n");
else
printk("OK\n");
intr = ioremap(MPC52xx_MBAR+MPC52xx_INTR_OFFSET, MPC52xx_INTR_SIZE);
// read - modify - write
intr_ctrl = in_be32(&intr->ctrl);
intr_ctrl &= 0xfff3ffff;
intr_ctrl |= 0x00080200;
out_be32(&intr->ctrl, intr_ctrl); // ERROR!
if(intr) iounmap(intr);
// ...
}
On the Line, marked with "ERROR!" the prozessor hangs and the kernel drops
out.
TIA: Silvio
Mit freundlichen Gruessen
Silvio Fricke
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next reply other threads:[~2007-09-10 9:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-10 9:03 S. Fricke [this message]
2007-09-11 12:43 ` Interrupt-problem mpc5200 S. Fricke
2007-09-12 0:47 ` WITTROCK
2007-09-11 12:49 ` WITTROCK
2007-09-11 13:48 ` S. Fricke
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