Staging: comedi: add ni_670x driver

Driver for National Instruments 670x

From: Bart Joris <bjoris@advalvas.be>
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/ni_670x.c

+/*
+    comedi/drivers/ni_670x.c
+    Hardware driver for NI 670x devices
+
+    COMEDI - Linux Control and Measurement Device Interface
+    Copyright (C) 1997-2001 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: ni_670x
+Description: National Instruments 670x
+Author: Bart Joris <bjoris@advalvas.be>
+Updated: Wed, 11 Dec 2002 18:25:35 -0800
+Devices: [National Instruments] PCI-6703 (ni_670x), PCI-6704
+Status: unknown
+
+Commands are not supported.
+*/
+
+/*
+	Bart Joris <bjoris@advalvas.be> Last updated on 20/08/2001
+
+	Manuals:
+
+	322110a.pdf	PCI/PXI-6704 User Manual
+	322110b.pdf	PCI/PXI-6703/6704 User Manual
+
+*/
+
+#include "../comedidev.h"
+
+#include "mite.h"
+
+#define PCI_VENDOR_ID_NATINST	0x1093
+
+#define AO_VALUE_OFFSET			0x00
+#define	AO_CHAN_OFFSET			0x0c
+#define	AO_STATUS_OFFSET		0x10
+#define AO_CONTROL_OFFSET		0x10
+#define	DIO_PORT0_DIR_OFFSET	0x20
+#define	DIO_PORT0_DATA_OFFSET	0x24
+#define	DIO_PORT1_DIR_OFFSET	0x28
+#define	DIO_PORT1_DATA_OFFSET	0x2c
+#define	MISC_STATUS_OFFSET		0x14
+#define	MISC_CONTROL_OFFSET		0x14
+
+/* Board description*/
+
+typedef struct ni_670x_board_struct {
+	unsigned short dev_id;
+	const char *name;
+	unsigned short ao_chans;
+	unsigned short ao_bits;
+} ni_670x_board;
+static const ni_670x_board ni_670x_boards[] = {
+	{
+	      dev_id:	0x2c90,
+	      name:	"PCI-6703",
+	      ao_chans:16,
+	      ao_bits:	16,
+		},
+	{
+	      dev_id:	0x1920,
+	      name:	"PXI-6704",
+	      ao_chans:32,
+	      ao_bits:	16,
+		},
+	{
+	      dev_id:	0x1290,
+	      name:	"PCI-6704",
+	      ao_chans:32,
+	      ao_bits:	16,
+		},
+};
+
+static DEFINE_PCI_DEVICE_TABLE(ni_670x_pci_table) = {
+	{PCI_VENDOR_ID_NATINST, 0x2c90, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{PCI_VENDOR_ID_NATINST, 0x1920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	//{ PCI_VENDOR_ID_NATINST, 0x0000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+	{0}
+};
+
+MODULE_DEVICE_TABLE(pci, ni_670x_pci_table);
+
+#define thisboard ((ni_670x_board *)dev->board_ptr)
+
+typedef struct {
+	struct mite_struct *mite;
+	int boardtype;
+	int dio;
+	lsampl_t ao_readback[32];
+} ni_670x_private;
+
+#define devpriv ((ni_670x_private *)dev->private)
+#define n_ni_670x_boards (sizeof(ni_670x_boards)/sizeof(ni_670x_boards[0]))
+
+static int ni_670x_attach(comedi_device * dev, comedi_devconfig * it);
+static int ni_670x_detach(comedi_device * dev);
+
+static comedi_driver driver_ni_670x = {
+      driver_name:"ni_670x",
+      module:THIS_MODULE,
+      attach:ni_670x_attach,
+      detach:ni_670x_detach,
+};
+
+COMEDI_PCI_INITCLEANUP(driver_ni_670x, ni_670x_pci_table);
+
+static comedi_lrange range_0_20mA = { 1, {RANGE_mA(0, 20)} };
+
+static int ni_670x_find_device(comedi_device * dev, int bus, int slot);
+
+static int ni_670x_ao_winsn(comedi_device * dev, comedi_subdevice * s,
+	comedi_insn * insn, lsampl_t * data);
+static int ni_670x_ao_rinsn(comedi_device * dev, comedi_subdevice * s,
+	comedi_insn * insn, lsampl_t * data);
+static int ni_670x_dio_insn_bits(comedi_device * dev, comedi_subdevice * s,
+	comedi_insn * insn, lsampl_t * data);
+static int ni_670x_dio_insn_config(comedi_device * dev, comedi_subdevice * s,
+	comedi_insn * insn, lsampl_t * data);
+
+static int ni_670x_attach(comedi_device * dev, comedi_devconfig * it)
+{
+	comedi_subdevice *s;
+	int ret;
+	int i;
+
+	printk("comedi%d: ni_670x: ", dev->minor);
+
+	if ((ret = alloc_private(dev, sizeof(ni_670x_private))) < 0)
+		return ret;
+
+	ret = ni_670x_find_device(dev, it->options[0], it->options[1]);
+	if (ret < 0)
+		return ret;
+
+	ret = mite_setup(devpriv->mite);
+	if (ret < 0) {
+		printk("error setting up mite\n");
+		return ret;
+	}
+	dev->board_name = thisboard->name;
+	dev->irq = mite_irq(devpriv->mite);
+	printk(" %s", dev->board_name);
+
+	if (alloc_subdevices(dev, 2) < 0)
+		return -ENOMEM;
+
+	s = dev->subdevices + 0;
+	/* analog output subdevice */
+	s->type = COMEDI_SUBD_AO;
+	s->subdev_flags = SDF_WRITABLE;
+	s->n_chan = thisboard->ao_chans;
+	s->maxdata = 0xffff;
+	if (s->n_chan == 32) {
+		const comedi_lrange **range_table_list;
+
+		range_table_list = kmalloc(sizeof(comedi_lrange *) * 32,
+			GFP_KERNEL);
+		if (!range_table_list)
+			return -ENOMEM;
+		s->range_table_list = range_table_list;
+		for (i = 0; i < 16; i++) {
+			range_table_list[i] = &range_bipolar10;
+			range_table_list[16 + i] = &range_0_20mA;
+		}
+	} else {
+		s->range_table = &range_bipolar10;
+	}
+	s->insn_write = &ni_670x_ao_winsn;
+	s->insn_read = &ni_670x_ao_rinsn;
+
+	s = dev->subdevices + 1;
+	/* digital i/o subdevice */
+	s->type = COMEDI_SUBD_DIO;
+	s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
+	s->n_chan = 8;
+	s->maxdata = 1;
+	s->range_table = &range_digital;
+	s->insn_bits = ni_670x_dio_insn_bits;
+	s->insn_config = ni_670x_dio_insn_config;
+
+	writel(0x10, devpriv->mite->daq_io_addr + MISC_CONTROL_OFFSET);	/* Config of misc registers */
+	writel(0x00, devpriv->mite->daq_io_addr + AO_CONTROL_OFFSET);	/* Config of ao registers */
+
+	printk("attached\n");
+
+	return 1;
+}
+
+static int ni_670x_detach(comedi_device * dev)
+{
+	printk("comedi%d: ni_670x: remove\n", dev->minor);
+
+	if (dev->subdevices[0].range_table_list) {
+		kfree(dev->subdevices[0].range_table_list);
+	}
+	if (dev->private && devpriv->mite)
+		mite_unsetup(devpriv->mite);
+
+	if (dev->irq)
+		comedi_free_irq(dev->irq, dev);
+
+	return 0;
+}
+
+static int ni_670x_ao_winsn(comedi_device * dev, comedi_subdevice * s,
+	comedi_insn * insn, lsampl_t * data)
+{
+	int i;
+	int chan = CR_CHAN(insn->chanspec);
+
+	/* Channel number mapping :
+
+	   NI 6703/ NI 6704     | NI 6704 Only
+	   ----------------------------------------------------
+	   vch(0)       :       0       | ich(16)       :       1
+	   vch(1)       :       2       | ich(17)       :       3
+	   .    :       .       |   .                   .
+	   .    :       .       |   .                   .
+	   .    :       .       |   .                   .
+	   vch(15)      :       30      | ich(31)       :       31      */
+
+	for (i = 0; i < insn->n; i++) {
+		writel(((chan & 15) << 1) | ((chan & 16) >> 4), devpriv->mite->daq_io_addr + AO_CHAN_OFFSET);	/* First write in channel register which channel to use */
+		writel(data[i], devpriv->mite->daq_io_addr + AO_VALUE_OFFSET);	/* write channel value */
+		devpriv->ao_readback[chan] = data[i];
+	}
+
+	return i;
+}
+
+static int ni_670x_ao_rinsn(comedi_device * dev, comedi_subdevice * s,
+	comedi_insn * insn, lsampl_t * data)
+{
+	int i;
+	int chan = CR_CHAN(insn->chanspec);
+
+	for (i = 0; i < insn->n; i++)
+		data[i] = devpriv->ao_readback[chan];
+
+	return i;
+}
+
+static int ni_670x_dio_insn_bits(comedi_device * dev, comedi_subdevice * s,
+	comedi_insn * insn, lsampl_t * data)
+{
+	if (insn->n != 2)
+		return -EINVAL;
+
+	/* The insn data is a mask in data[0] and the new data
+	 * in data[1], each channel cooresponding to a bit. */
+	if (data[0]) {
+		s->state &= ~data[0];
+		s->state |= data[0] & data[1];
+		writel(s->state,
+			devpriv->mite->daq_io_addr + DIO_PORT0_DATA_OFFSET);
+	}
+
+	/* on return, data[1] contains the value of the digital
+	 * input lines. */
+	data[1] = readl(devpriv->mite->daq_io_addr + DIO_PORT0_DATA_OFFSET);
+
+	return 2;
+}
+
+static int ni_670x_dio_insn_config(comedi_device * dev, comedi_subdevice * s,
+	comedi_insn * insn, lsampl_t * data)
+{
+	int chan = CR_CHAN(insn->chanspec);
+
+	switch (data[0]) {
+	case INSN_CONFIG_DIO_OUTPUT:
+		s->io_bits |= 1 << chan;
+		break;
+	case INSN_CONFIG_DIO_INPUT:
+		s->io_bits &= ~(1 << chan);
+		break;
+	case INSN_CONFIG_DIO_QUERY:
+		data[1] =
+			(s->
+			io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT;
+		return insn->n;
+		break;
+	default:
+		return -EINVAL;
+		break;
+	}
+	writel(s->io_bits, devpriv->mite->daq_io_addr + DIO_PORT0_DIR_OFFSET);
+
+	return insn->n;
+}
+
+static int ni_670x_find_device(comedi_device * dev, int bus, int slot)
+{
+	struct mite_struct *mite;
+	int i;
+
+	for (mite = mite_devices; mite; mite = mite->next) {
+		if (mite->used)
+			continue;
+		if (bus || slot) {
+			if (bus != mite->pcidev->bus->number
+				|| slot != PCI_SLOT(mite->pcidev->devfn))
+				continue;
+		}
+
+		for (i = 0; i < n_ni_670x_boards; i++) {
+			if (mite_device_id(mite) == ni_670x_boards[i].dev_id) {
+				dev->board_ptr = ni_670x_boards + i;
+				devpriv->mite = mite;
+
+				return 0;
+			}
+		}
+	}
+	printk("no device found\n");
+	mite_list_devices();
+	return -EIO;
+}