staging: comedi: adv_pci_dio: reset digital outputs in subdevice init

Currently the board reset function also resets the digital output channels
to 0. This works but it makes the reset function a bit messy and each
board type has to be handled special.

Move the digital output reset into the subdevice init where it can be
handle based on the subdevice setup.

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>

drivers/staging/comedi/drivers/adv_pci_dio.c

@@ -321,11 +321,6 @@ static int pci_dio_reset(struct comedi_device *dev)
 
 	switch (board->cardtype) {
 	case TYPE_PCI1730:
-		outb(0, dev->iobase + PCI1730_DO);	/*  clear outputs */
-		outb(0, dev->iobase + PCI1730_DO + 1);
-		outb(0, dev->iobase + PCI1730_IDO);
-		outb(0, dev->iobase + PCI1730_IDO + 1);
-		/* fallthrough */
 	case TYPE_PCI1733:
 		/* disable interrupts */
 		outb(0, dev->iobase + PCI1730_3_INT_EN);
@@ -335,21 +330,11 @@ static int pci_dio_reset(struct comedi_device *dev)
 		outb(0, dev->iobase + PCI1730_3_INT_RF);
 		break;
 	case TYPE_PCI1734:
-		outb(0, dev->iobase + PCI1734_IDO);	/*  clear outputs */
-		outb(0, dev->iobase + PCI1734_IDO + 1);
-		outb(0, dev->iobase + PCI1734_IDO + 2);
-		outb(0, dev->iobase + PCI1734_IDO + 3);
 		break;
 	case TYPE_PCI1735:
-		outb(0, dev->iobase + PCI1735_DO);	/*  clear outputs */
-		outb(0, dev->iobase + PCI1735_DO + 1);
-		outb(0, dev->iobase + PCI1735_DO + 2);
-		outb(0, dev->iobase + PCI1735_DO + 3);
 		break;
 
 	case TYPE_PCI1736:
-		outb(0, dev->iobase + PCI1736_IDO);
-		outb(0, dev->iobase + PCI1736_IDO + 1);
 		/* disable interrupts */
 		outb(0, dev->iobase + PCI1736_3_INT_EN);
 		/* clear interrupts */
@@ -371,10 +356,6 @@ static int pci_dio_reset(struct comedi_device *dev)
 	case TYPE_PCI1752:
 		outw(0, dev->iobase + PCI1752_6_CFC); /* disable channel freeze
 						       * function */
-		outw(0, dev->iobase + PCI1752_IDO);	/*  clear outputs */
-		outw(0, dev->iobase + PCI1752_IDO + 2);
-		outw(0, dev->iobase + PCI1752_IDO2);
-		outw(0, dev->iobase + PCI1752_IDO2 + 2);
 		break;
 	case TYPE_PCI1753E:
 		outb(0x88, dev->iobase + PCI1753E_ICR0); /* disable & clear
@@ -403,8 +384,6 @@ static int pci_dio_reset(struct comedi_device *dev)
 		outw(0x08, dev->iobase + PCI1754_6_ICR0); /* disable and clear
 							   * interrupts */
 		outw(0x08, dev->iobase + PCI1754_6_ICR1);
-		outw(0, dev->iobase + PCI1756_IDO);	/*  clear outputs */
-		outw(0, dev->iobase + PCI1756_IDO + 2);
 		break;
 	case TYPE_PCI1762:
 		outw(0x0101, dev->iobase + PCI1762_ICR); /* disable & clear
@@ -507,6 +486,21 @@ static int pci_dio_auto_attach(struct comedi_device *dev,
 						? pci_dio_insn_bits_do_w
 						: pci_dio_insn_bits_do_b;
 			s->private	= (void *)d->addr;
+
+			/* reset all outputs to 0 */
+			if (board->is_16bit) {
+				outw(0, dev->iobase + d->addr);
+				if (s->n_chan > 16)
+					outw(0, dev->iobase + d->addr + 2);
+			} else {
+				outb(0, dev->iobase + d->addr);
+				if (s->n_chan > 8)
+					outb(0, dev->iobase + d->addr + 1);
+				if (s->n_chan > 16)
+					outb(0, dev->iobase + d->addr + 2);
+				if (s->n_chan > 24)
+					outb(0, dev->iobase + d->addr + 3);
+			}
 		}
 	}