Staging: comedi: add contec_pci_dio driver

driver for Contec PIO1616L digital I/O board

From: Stefano Rivoir <s.rivoir@gts.it>
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/contec_pci_dio.c

+/*
+    comedi/drivers/contec_pci_dio.c
+
+    COMEDI - Linux Control and Measurement Device Interface
+    Copyright (C) 2000 David A. Schleef <ds@schleef.org>
+
+    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: contec_pci_dio
+Description: Contec PIO1616L digital I/O board
+Devices: [Contec] PIO1616L (contec_pci_dio)
+Author: Stefano Rivoir <s.rivoir@gts.it>
+Updated: Wed, 27 Jun 2007 13:00:06 +0100
+Status: works
+
+Configuration Options:
+  [0] - PCI bus of device (optional)
+  [1] - PCI slot of device (optional)
+  If bus/slot is not specified, the first supported
+  PCI device found will be used.
+*/
+
+#include "../comedidev.h"
+
+#include "comedi_pci.h"
+
+typedef enum contec_model {
+	PIO1616L = 0,
+} contec_model;
+
+typedef struct contec_board {
+	const char *name;
+	int model;
+	int in_ports;
+	int out_ports;
+	int in_offs;
+	int out_offs;
+	int out_boffs;
+} contec_board;
+static const contec_board contec_boards[] = {
+	{"PIO1616L", PIO1616L, 16, 16, 0, 2, 10},
+};
+
+#define PCI_DEVICE_ID_PIO1616L 0x8172
+static DEFINE_PCI_DEVICE_TABLE(contec_pci_table) = {
+	{PCI_VENDOR_ID_CONTEC, PCI_DEVICE_ID_PIO1616L, PCI_ANY_ID, PCI_ANY_ID,
+		0, 0, PIO1616L},
+	{0}
+};
+
+MODULE_DEVICE_TABLE(pci, contec_pci_table);
+
+#define thisboard ((const contec_board *)dev->board_ptr)
+
+typedef struct {
+	int data;
+
+	struct pci_dev *pci_dev;
+
+} contec_private;
+
+#define devpriv ((contec_private *)dev->private)
+
+static int contec_attach(comedi_device * dev, comedi_devconfig * it);
+static int contec_detach(comedi_device * dev);
+static comedi_driver driver_contec = {
+      driver_name:"contec_pci_dio",
+      module:THIS_MODULE,
+      attach:contec_attach,
+      detach:contec_detach,
+};
+
+/* Classic digital IO */
+static int contec_di_insn_bits(comedi_device * dev, comedi_subdevice * s,
+	comedi_insn * insn, lsampl_t * data);
+static int contec_do_insn_bits(comedi_device * dev, comedi_subdevice * s,
+	comedi_insn * insn, lsampl_t * data);
+
+#if 0
+static int contec_cmdtest(comedi_device * dev, comedi_subdevice * s,
+	comedi_cmd * cmd);
+
+static int contec_ns_to_timer(unsigned int *ns, int round);
+#endif
+
+static int contec_attach(comedi_device * dev, comedi_devconfig * it)
+{
+	struct pci_dev *pcidev;
+	comedi_subdevice *s;
+
+	printk("comedi%d: contec: ", dev->minor);
+
+	dev->board_name = thisboard->name;
+
+	if (alloc_private(dev, sizeof(contec_private)) < 0)
+		return -ENOMEM;
+
+	if (alloc_subdevices(dev, 2) < 0)
+		return -ENOMEM;
+
+	for (pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
+		pcidev != NULL;
+		pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pcidev)) {
+
+		if (pcidev->vendor == PCI_VENDOR_ID_CONTEC &&
+			pcidev->device == PCI_DEVICE_ID_PIO1616L) {
+			if (it->options[0] || it->options[1]) {
+				/* Check bus and slot. */
+				if (it->options[0] != pcidev->bus->number ||
+					it->options[1] !=
+					PCI_SLOT(pcidev->devfn)) {
+					continue;
+				}
+			}
+			devpriv->pci_dev = pcidev;
+			if (comedi_pci_enable(pcidev, "contec_pci_dio")) {
+				printk("error enabling PCI device and request regions!\n");
+				return -EIO;
+			}
+			dev->iobase = pci_resource_start(pcidev, 0);
+			printk(" base addr %lx ", dev->iobase);
+
+			dev->board_ptr = contec_boards + 0;
+
+			s = dev->subdevices + 0;
+
+			s->type = COMEDI_SUBD_DI;
+			s->subdev_flags = SDF_READABLE;
+			s->n_chan = 16;
+			s->maxdata = 1;
+			s->range_table = &range_digital;
+			s->insn_bits = contec_di_insn_bits;
+
+			s = dev->subdevices + 1;
+			s->type = COMEDI_SUBD_DO;
+			s->subdev_flags = SDF_WRITABLE;
+			s->n_chan = 16;
+			s->maxdata = 1;
+			s->range_table = &range_digital;
+			s->insn_bits = contec_do_insn_bits;
+
+			printk("attached\n");
+
+			return 1;
+		}
+	}
+
+	printk("card not present!\n");
+
+	return -EIO;
+}
+
+static int contec_detach(comedi_device * dev)
+{
+	printk("comedi%d: contec: remove\n", dev->minor);
+
+	if (devpriv && devpriv->pci_dev) {
+		if (dev->iobase) {
+			comedi_pci_disable(devpriv->pci_dev);
+		}
+		pci_dev_put(devpriv->pci_dev);
+	}
+
+	return 0;
+}
+
+#if 0
+static int contec_cmdtest(comedi_device * dev, comedi_subdevice * s,
+	comedi_cmd * cmd)
+{
+	printk("contec_cmdtest called\n");
+	return 0;
+}
+
+static int contec_ns_to_timer(unsigned int *ns, int round)
+{
+	return *ns;
+}
+#endif
+
+static int contec_do_insn_bits(comedi_device * dev, comedi_subdevice * s,
+	comedi_insn * insn, lsampl_t * data)
+{
+
+	printk("contec_do_insn_bits called\n");
+	printk(" data: %d %d\n", data[0], data[1]);
+
+	if (insn->n != 2)
+		return -EINVAL;
+
+	if (data[0]) {
+		s->state &= ~data[0];
+		s->state |= data[0] & data[1];
+		rt_printk("  out: %d on %lx\n", s->state,
+			dev->iobase + thisboard->out_offs);
+		outw(s->state, dev->iobase + thisboard->out_offs);
+	}
+	return 2;
+}
+
+static int contec_di_insn_bits(comedi_device * dev, comedi_subdevice * s,
+	comedi_insn * insn, lsampl_t * data)
+{
+
+	rt_printk("contec_di_insn_bits called\n");
+	rt_printk(" data: %d %d\n", data[0], data[1]);
+
+	if (insn->n != 2)
+		return -EINVAL;
+
+	data[1] = inw(dev->iobase + thisboard->in_offs);
+
+	return 2;
+}
+
+COMEDI_PCI_INITCLEANUP(driver_contec, contec_pci_table);