Staging: comedi: add pcm3730 driver

Driver for PCM3730 and clones

From: Blaine Lee <blee@tellurian-inc.com>
Cc: David Schleef <ds@schleef.org>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/comedi/drivers/pcm3730.c

+/*
+ * comedi/drivers/pcm3730.c
+ * Driver for PCM3730 and clones
+ * Blaine Lee
+ * from pcl725 by David S.
+ */
+/*
+Driver: pcm3730
+Description: PCM3730
+Author: Blaine Lee
+Devices: [Advantech] PCM-3730 (pcm3730)
+Status: unknown
+
+Configuration options:
+  [0] - I/O port base
+*/
+
+#include "../comedidev.h"
+
+#include <linux/ioport.h>
+
+#define PCM3730_SIZE 4		// consecutive io port addresses
+
+#define PCM3730_DOA 0		// offsets for each port
+#define PCM3730_DOB 2
+#define PCM3730_DOC 3
+#define PCM3730_DIA 0
+#define PCM3730_DIB 2
+#define PCM3730_DIC 3
+
+static int pcm3730_attach(comedi_device * dev, comedi_devconfig * it);
+static int pcm3730_detach(comedi_device * dev);
+static comedi_driver driver_pcm3730 = {
+      driver_name:"pcm3730",
+      module:THIS_MODULE,
+      attach:pcm3730_attach,
+      detach:pcm3730_detach,
+};
+
+COMEDI_INITCLEANUP(driver_pcm3730);
+
+static int pcm3730_do_insn_bits(comedi_device * dev, comedi_subdevice * s,
+	comedi_insn * insn, lsampl_t * data)
+{
+	if (insn->n != 2)
+		return -EINVAL;
+	if (data[0]) {
+		s->state &= ~data[0];
+		s->state |= (data[0] & data[1]);
+		outb(s->state, dev->iobase + (unsigned long)(s->private));
+	}
+	data[1] = s->state;
+
+	return 2;
+}
+
+static int pcm3730_di_insn_bits(comedi_device * dev, comedi_subdevice * s,
+	comedi_insn * insn, lsampl_t * data)
+{
+	if (insn->n != 2)
+		return -EINVAL;
+	data[1] = inb(dev->iobase + (unsigned long)(s->private));
+	return 2;
+}
+
+static int pcm3730_attach(comedi_device * dev, comedi_devconfig * it)
+{
+	comedi_subdevice *s;
+	unsigned long iobase;
+
+	iobase = it->options[0];
+	printk("comedi%d: pcm3730: 0x%04lx ", dev->minor, iobase);
+	if (!request_region(iobase, PCM3730_SIZE, "pcm3730")) {
+		printk("I/O port conflict\n");
+		return -EIO;
+	}
+	dev->iobase = iobase;
+	dev->board_name = "pcm3730";
+	dev->iobase = dev->iobase;
+	dev->irq = 0;
+
+	if (alloc_subdevices(dev, 6) < 0)
+		return -ENOMEM;
+
+	s = dev->subdevices + 0;
+	s->type = COMEDI_SUBD_DO;
+	s->subdev_flags = SDF_WRITABLE;
+	s->maxdata = 1;
+	s->n_chan = 8;
+	s->insn_bits = pcm3730_do_insn_bits;
+	s->range_table = &range_digital;
+	s->private = (void *)PCM3730_DOA;
+
+	s = dev->subdevices + 1;
+	s->type = COMEDI_SUBD_DO;
+	s->subdev_flags = SDF_WRITABLE;
+	s->maxdata = 1;
+	s->n_chan = 8;
+	s->insn_bits = pcm3730_do_insn_bits;
+	s->range_table = &range_digital;
+	s->private = (void *)PCM3730_DOB;
+
+	s = dev->subdevices + 2;
+	s->type = COMEDI_SUBD_DO;
+	s->subdev_flags = SDF_WRITABLE;
+	s->maxdata = 1;
+	s->n_chan = 8;
+	s->insn_bits = pcm3730_do_insn_bits;
+	s->range_table = &range_digital;
+	s->private = (void *)PCM3730_DOC;
+
+	s = dev->subdevices + 3;
+	s->type = COMEDI_SUBD_DI;
+	s->subdev_flags = SDF_READABLE;
+	s->maxdata = 1;
+	s->n_chan = 8;
+	s->insn_bits = pcm3730_di_insn_bits;
+	s->range_table = &range_digital;
+	s->private = (void *)PCM3730_DIA;
+
+	s = dev->subdevices + 4;
+	s->type = COMEDI_SUBD_DI;
+	s->subdev_flags = SDF_READABLE;
+	s->maxdata = 1;
+	s->n_chan = 8;
+	s->insn_bits = pcm3730_di_insn_bits;
+	s->range_table = &range_digital;
+	s->private = (void *)PCM3730_DIB;
+
+	s = dev->subdevices + 5;
+	s->type = COMEDI_SUBD_DI;
+	s->subdev_flags = SDF_READABLE;
+	s->maxdata = 1;
+	s->n_chan = 8;
+	s->insn_bits = pcm3730_di_insn_bits;
+	s->range_table = &range_digital;
+	s->private = (void *)PCM3730_DIC;
+
+	printk("\n");
+
+	return 0;
+}
+
+static int pcm3730_detach(comedi_device * dev)
+{
+	printk("comedi%d: pcm3730: remove\n", dev->minor);
+
+	if (dev->iobase)
+		release_region(dev->iobase, PCM3730_SIZE);
+
+	return 0;
+}