Staging: comedi: add aio_iiro_16 driver

Driver for Acces I/O Products PC-104 IIRO16 Relay And Isolated Input
Board

From: Zachary Ware <zach.ware@cctechnol.com>
Cc: David Schleef <ds@schleef.org>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/comedi/drivers/aio_iiro_16.c

+/*
+
+    comedi/drivers/aio_iiro_16.c
+
+    Driver for Acces I/O Products PC-104 AIO-IIRO-16 Digital I/O board
+    Copyright (C) 2006 C&C Technologies, Inc.
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+/*
+
+Driver: aio_iiro_16
+Description: Acces I/O Products PC-104 IIRO16 Relay And Isolated Input Board
+Author: Zachary Ware <zach.ware@cctechnol.com>
+Devices:
+ [Acces I/O] PC-104 AIO12-8
+Status: experimental
+
+Configuration Options:
+  [0] - I/O port base address
+
+*/
+
+#include "../comedidev.h"
+#include <linux/ioport.h>
+
+#define AIO_IIRO_16_SIZE	0x08
+#define AIO_IIRO_16_RELAY_0_7	0x00
+#define AIO_IIRO_16_INPUT_0_7	0x01
+#define AIO_IIRO_16_IRQ		0x02
+#define AIO_IIRO_16_RELAY_8_15	0x04
+#define AIO_IIRO_16_INPUT_8_15	0x05
+
+typedef struct aio_iiro_16_board_struct {
+	const char *name;
+	int do_;
+	int di;
+} aio_iiro_16_board;
+
+static const aio_iiro_16_board aio_iiro_16_boards[] = {
+	{
+	      name:	"aio_iiro_16",
+	      di:	16,
+      do_:	16},
+};
+
+#define	thisboard	((const aio_iiro_16_board *) dev->board_ptr)
+
+typedef struct {
+	int data;
+	struct pci_dev *pci_dev;
+	lsampl_t ao_readback[2];
+} aio_iiro_16_private;
+
+#define	devpriv	((aio_iiro_16_private *) dev->private)
+
+static int aio_iiro_16_attach(comedi_device * dev, comedi_devconfig * it);
+
+static int aio_iiro_16_detach(comedi_device * dev);
+
+static comedi_driver driver_aio_iiro_16 = {
+      driver_name:"aio_iiro_16",
+      module:THIS_MODULE,
+      attach:aio_iiro_16_attach,
+      detach:aio_iiro_16_detach,
+      board_name:&aio_iiro_16_boards[0].name,
+      offset:sizeof(aio_iiro_16_board),
+      num_names:sizeof(aio_iiro_16_boards) / sizeof(aio_iiro_16_board),
+};
+
+static int aio_iiro_16_dio_insn_bits_read(comedi_device * dev,
+	comedi_subdevice * s, comedi_insn * insn, lsampl_t * data);
+
+static int aio_iiro_16_dio_insn_bits_write(comedi_device * dev,
+	comedi_subdevice * s, comedi_insn * insn, lsampl_t * data);
+
+static int aio_iiro_16_attach(comedi_device * dev, comedi_devconfig * it)
+{
+	int iobase;
+	comedi_subdevice *s;
+
+	printk("comedi%d: aio_iiro_16: ", dev->minor);
+
+	dev->board_name = thisboard->name;
+
+	iobase = it->options[0];
+
+	if (!request_region(iobase, AIO_IIRO_16_SIZE, dev->board_name)) {
+		printk("I/O port conflict");
+		return -EIO;
+	}
+
+	dev->iobase = iobase;
+
+	if (alloc_private(dev, sizeof(aio_iiro_16_private)) < 0)
+		return -ENOMEM;
+
+	if (alloc_subdevices(dev, 2) < 0)
+		return -ENOMEM;
+
+	s = dev->subdevices + 0;
+	s->type = COMEDI_SUBD_DIO;
+	s->subdev_flags = SDF_WRITABLE;
+	s->n_chan = 16;
+	s->maxdata = 1;
+	s->range_table = &range_digital;
+	s->insn_bits = aio_iiro_16_dio_insn_bits_write;
+
+	s = dev->subdevices + 1;
+	s->type = COMEDI_SUBD_DIO;
+	s->subdev_flags = SDF_READABLE;
+	s->n_chan = 16;
+	s->maxdata = 1;
+	s->range_table = &range_digital;
+	s->insn_bits = aio_iiro_16_dio_insn_bits_read;
+
+	printk("attached\n");
+
+	return 1;
+}
+
+static int aio_iiro_16_detach(comedi_device * dev)
+{
+	printk("comedi%d: aio_iiro_16: remove\n", dev->minor);
+
+	if (dev->iobase)
+		release_region(dev->iobase, AIO_IIRO_16_SIZE);
+
+	return 0;
+}
+
+static int aio_iiro_16_dio_insn_bits_write(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 & 0xff, dev->iobase + AIO_IIRO_16_RELAY_0_7);
+		outb((s->state >> 8) & 0xff,
+			dev->iobase + AIO_IIRO_16_RELAY_8_15);
+	}
+
+	data[1] = s->state;
+
+	return 2;
+}
+
+static int aio_iiro_16_dio_insn_bits_read(comedi_device * dev,
+	comedi_subdevice * s, comedi_insn * insn, lsampl_t * data)
+{
+	if (insn->n != 2)
+		return -EINVAL;
+
+	data[1] = 0;
+	data[1] |= inb(dev->iobase + AIO_IIRO_16_INPUT_0_7);
+	data[1] |= inb(dev->iobase + AIO_IIRO_16_INPUT_8_15) << 8;
+
+	return 2;
+}
+
+COMEDI_INITCLEANUP(driver_aio_iiro_16);