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staging: comedi: ni_6527: introduce ni6527_reset()

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Factor the board reset code out of the (*attach). Do the reset as
soon as possible to ensure the interrupts are disabled.

For convienence, use the ni6257_reset() during the (*detach) instead
of just disabling the interrupts.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2013-10-01 15:13:48 -07:00 committed by Greg Kroah-Hartman
parent 42e705e91f
commit 5dfbd5051c
1 changed files with 16 additions and 9 deletions
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25
drivers/staging/comedi/drivers/ni_6527.c
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@ -334,6 +334,19 @@ static int ni6527_intr_insn_config(struct comedi_device *dev,
return insn->n;
}
static void ni6527_reset(struct comedi_device *dev)
{
struct ni6527_private *devpriv = dev->private;
void __iomem *mmio = devpriv->mmio_base;
/* disable deglitch filters on all channels */
ni6527_set_filter_enable(dev, 0);
writeb(NI6527_CLR_IRQS | NI6527_CLR_RESET_FILT,
mmio + NI6527_CLR_REG);
writeb(NI6527_CTRL_DISABLE_IRQS, mmio + NI6527_CTRL_REG);
}
static int ni6527_auto_attach(struct comedi_device *dev,
unsigned long context)
{
@ -366,6 +379,8 @@ static int ni6527_auto_attach(struct comedi_device *dev,
if (readb(devpriv->mmio_base + NI6527_ID_REG) != 0x27)
return -ENODEV;
ni6527_reset(dev);
ret = comedi_alloc_subdevices(dev, 3);
if (ret)
return ret;
@ -400,13 +415,6 @@ static int ni6527_auto_attach(struct comedi_device *dev,
s->insn_bits = ni6527_intr_insn_bits;
s->insn_config = ni6527_intr_insn_config;
ni6527_set_filter_enable(dev, 0);
writeb(NI6527_CLR_IRQS | NI6527_CLR_RESET_FILT,
devpriv->mmio_base + NI6527_CLR_REG);
writeb(NI6527_CTRL_DISABLE_IRQS,
devpriv->mmio_base + NI6527_CTRL_REG);
ret = request_irq(pcidev->irq, ni6527_interrupt,
IRQF_SHARED, dev->board_name, dev);
if (ret < 0)
@ -422,8 +430,7 @@ static void ni6527_detach(struct comedi_device *dev)
struct ni6527_private *devpriv = dev->private;
if (devpriv && devpriv->mmio_base)
writeb(NI6527_CTRL_DISABLE_IRQS,
devpriv->mmio_base + NI6527_CTRL_REG);
ni6527_reset(dev);
if (dev->irq)
free_irq(dev->irq, dev);
comedi_pci_disable(dev);