1 files changed, 489 insertions, 0 deletions

diff --git a/drivers/staging/comedi/drivers/ni_6527.c b/drivers/staging/comedi/drivers/ni_6527.c
new file mode 100644
index 000000000000..e01ecb6760f9
--- /dev/null
+++ b/drivers/staging/comedi/drivers/ni_6527.c
@@ -0,0 +1,489 @@
+/*
+    comedi/drivers/ni_6527.c
+    driver for National Instruments PCI-6527
+
+    COMEDI - Linux Control and Measurement Device Interface
+    Copyright (C) 1999,2002,2003 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_6527
+Description: National Instruments 6527
+Author: ds
+Status: works
+Devices: [National Instruments] PCI-6527 (ni6527), PXI-6527
+Updated: Sat, 25 Jan 2003 13:24:40 -0800
+
+
+*/
+
+/*
+   Manuals (available from ftp://ftp.natinst.com/support/manuals)
+
+	370106b.pdf	6527 Register Level Programmer Manual
+
+ */
+
+#define DEBUG 1
+#define DEBUG_FLAGS
+
+#include "../comedidev.h"
+
+#include "mite.h"
+
+#define NI6527_DIO_SIZE 4096
+#define NI6527_MITE_SIZE 4096
+
+#define Port_Register(x)			(0x00+(x))
+#define ID_Register				0x06
+
+#define Clear_Register				0x07
+#define ClrEdge				0x08
+#define ClrOverflow			0x04
+#define ClrFilter			0x02
+#define ClrInterval			0x01
+
+#define Filter_Interval(x)			(0x08+(x))
+#define Filter_Enable(x)			(0x0c+(x))
+
+#define Change_Status				0x14
+#define MasterInterruptStatus		0x04
+#define Overflow			0x02
+#define EdgeStatus			0x01
+
+#define Master_Interrupt_Control		0x15
+#define FallingEdgeIntEnable		0x10
+#define RisingEdgeIntEnable		0x08
+#define MasterInterruptEnable		0x04
+#define OverflowIntEnable		0x02
+#define EdgeIntEnable			0x01
+
+#define Rising_Edge_Detection_Enable(x)		(0x018+(x))
+#define Falling_Edge_Detection_Enable(x)	(0x020+(x))
+
+static int ni6527_attach(struct comedi_device * dev, struct comedi_devconfig * it);
+static int ni6527_detach(struct comedi_device * dev);
+static struct comedi_driver driver_ni6527 = {
+      driver_name:"ni6527",
+      module:THIS_MODULE,
+      attach:ni6527_attach,
+      detach:ni6527_detach,
+};
+
+struct ni6527_board {
+
+	int dev_id;
+	const char *name;
+};
+
+static const struct ni6527_board ni6527_boards[] = {
+	{
+	      dev_id:	0x2b20,
+	      name:	"pci-6527",
+		},
+	{
+	      dev_id:	0x2b10,
+	      name:	"pxi-6527",
+		},
+};
+
+#define n_ni6527_boards (sizeof(ni6527_boards)/sizeof(ni6527_boards[0]))
+#define this_board ((const struct ni6527_board *)dev->board_ptr)
+
+static DEFINE_PCI_DEVICE_TABLE(ni6527_pci_table) = {
+	{PCI_VENDOR_ID_NATINST, 0x2b10, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{PCI_VENDOR_ID_NATINST, 0x2b20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{0}
+};
+
+MODULE_DEVICE_TABLE(pci, ni6527_pci_table);
+
+struct ni6527_private {
+	struct mite_struct *mite;
+	unsigned int filter_interval;
+	unsigned int filter_enable;
+};
+
+#define devpriv ((struct ni6527_private *)dev->private)
+
+static int ni6527_find_device(struct comedi_device * dev, int bus, int slot);
+
+static int ni6527_di_insn_config(struct comedi_device * dev, struct comedi_subdevice * s,
+	struct comedi_insn * insn, unsigned int * data)
+{
+	int chan = CR_CHAN(insn->chanspec);
+	unsigned int interval;
+
+	if (insn->n != 2)
+		return -EINVAL;
+
+	if (data[0] != INSN_CONFIG_FILTER)
+		return -EINVAL;
+
+	if (data[1]) {
+		interval = (data[1] + 100) / 200;
+		data[1] = interval * 200;
+
+		if (interval != devpriv->filter_interval) {
+			writeb(interval & 0xff,
+				devpriv->mite->daq_io_addr +
+				Filter_Interval(0));
+			writeb((interval >> 8) & 0xff,
+				devpriv->mite->daq_io_addr +
+				Filter_Interval(1));
+			writeb((interval >> 16) & 0x0f,
+				devpriv->mite->daq_io_addr +
+				Filter_Interval(2));
+
+			writeb(ClrInterval,
+				devpriv->mite->daq_io_addr + Clear_Register);
+
+			devpriv->filter_interval = interval;
+		}
+
+		devpriv->filter_enable |= 1 << chan;
+	} else {
+		devpriv->filter_enable &= ~(1 << chan);
+	}
+
+	writeb(devpriv->filter_enable,
+		devpriv->mite->daq_io_addr + Filter_Enable(0));
+	writeb(devpriv->filter_enable >> 8,
+		devpriv->mite->daq_io_addr + Filter_Enable(1));
+	writeb(devpriv->filter_enable >> 16,
+		devpriv->mite->daq_io_addr + Filter_Enable(2));
+
+	return 2;
+}
+
+static int ni6527_di_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s,
+	struct comedi_insn * insn, unsigned int * data)
+{
+	if (insn->n != 2)
+		return -EINVAL;
+
+	data[1] = readb(devpriv->mite->daq_io_addr + Port_Register(0));
+	data[1] |= readb(devpriv->mite->daq_io_addr + Port_Register(1)) << 8;
+	data[1] |= readb(devpriv->mite->daq_io_addr + Port_Register(2)) << 16;
+
+	return 2;
+}
+
+static int ni6527_do_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s,
+	struct comedi_insn * insn, unsigned int * data)
+{
+	if (insn->n != 2)
+		return -EINVAL;
+	if (data[0]) {
+		s->state &= ~data[0];
+		s->state |= (data[0] & data[1]);
+
+		/* The open relay state on the board cooresponds to 1,
+		 * but in Comedi, it is represented by 0. */
+		if (data[0] & 0x0000ff) {
+			writeb((s->state ^ 0xff),
+				devpriv->mite->daq_io_addr + Port_Register(3));
+		}
+		if (data[0] & 0x00ff00) {
+			writeb((s->state >> 8) ^ 0xff,
+				devpriv->mite->daq_io_addr + Port_Register(4));
+		}
+		if (data[0] & 0xff0000) {
+			writeb((s->state >> 16) ^ 0xff,
+				devpriv->mite->daq_io_addr + Port_Register(5));
+		}
+	}
+	data[1] = s->state;
+
+	return 2;
+}
+
+static irqreturn_t ni6527_interrupt(int irq, void *d PT_REGS_ARG)
+{
+	struct comedi_device *dev = d;
+	struct comedi_subdevice *s = dev->subdevices + 2;
+	unsigned int status;
+
+	status = readb(devpriv->mite->daq_io_addr + Change_Status);
+	if ((status & MasterInterruptStatus) == 0)
+		return IRQ_NONE;
+	if ((status & EdgeStatus) == 0)
+		return IRQ_NONE;
+
+	writeb(ClrEdge | ClrOverflow,
+		devpriv->mite->daq_io_addr + Clear_Register);
+
+	comedi_buf_put(s->async, 0);
+	s->async->events |= COMEDI_CB_EOS;
+	comedi_event(dev, s);
+	return IRQ_HANDLED;
+}
+
+static int ni6527_intr_cmdtest(struct comedi_device * dev, struct comedi_subdevice * s,
+	struct comedi_cmd * cmd)
+{
+	int err = 0;
+	int tmp;
+
+	/* step 1: make sure trigger sources are trivially valid */
+
+	tmp = cmd->start_src;
+	cmd->start_src &= TRIG_NOW;
+	if (!cmd->start_src || tmp != cmd->start_src)
+		err++;
+
+	tmp = cmd->scan_begin_src;
+	cmd->scan_begin_src &= TRIG_OTHER;
+	if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
+		err++;
+
+	tmp = cmd->convert_src;
+	cmd->convert_src &= TRIG_FOLLOW;
+	if (!cmd->convert_src || tmp != cmd->convert_src)
+		err++;
+
+	tmp = cmd->scan_end_src;
+	cmd->scan_end_src &= TRIG_COUNT;
+	if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
+		err++;
+
+	tmp = cmd->stop_src;
+	cmd->stop_src &= TRIG_COUNT;
+	if (!cmd->stop_src || tmp != cmd->stop_src)
+		err++;
+
+	if (err)
+		return 1;
+
+	/* step 2: make sure trigger sources are unique and mutually compatible */
+
+	if (err)
+		return 2;
+
+	/* step 3: make sure arguments are trivially compatible */
+
+	if (cmd->start_arg != 0) {
+		cmd->start_arg = 0;
+		err++;
+	}
+	if (cmd->scan_begin_arg != 0) {
+		cmd->scan_begin_arg = 0;
+		err++;
+	}
+	if (cmd->convert_arg != 0) {
+		cmd->convert_arg = 0;
+		err++;
+	}
+
+	if (cmd->scan_end_arg != 1) {
+		cmd->scan_end_arg = 1;
+		err++;
+	}
+	if (cmd->stop_arg != 0) {
+		cmd->stop_arg = 0;
+		err++;
+	}
+
+	if (err)
+		return 3;
+
+	/* step 4: fix up any arguments */
+
+	if (err)
+		return 4;
+
+	return 0;
+}
+
+static int ni6527_intr_cmd(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+	//struct comedi_cmd *cmd = &s->async->cmd;
+
+	writeb(ClrEdge | ClrOverflow,
+		devpriv->mite->daq_io_addr + Clear_Register);
+	writeb(FallingEdgeIntEnable | RisingEdgeIntEnable |
+		MasterInterruptEnable | EdgeIntEnable,
+		devpriv->mite->daq_io_addr + Master_Interrupt_Control);
+
+	return 0;
+}
+
+static int ni6527_intr_cancel(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+	writeb(0x00, devpriv->mite->daq_io_addr + Master_Interrupt_Control);
+
+	return 0;
+}
+
+static int ni6527_intr_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s,
+	struct comedi_insn * insn, unsigned int * data)
+{
+	if (insn->n < 1)
+		return -EINVAL;
+
+	data[1] = 0;
+	return 2;
+}
+
+static int ni6527_intr_insn_config(struct comedi_device * dev, struct comedi_subdevice * s,
+	struct comedi_insn * insn, unsigned int * data)
+{
+	if (insn->n < 1)
+		return -EINVAL;
+	if (data[0] != INSN_CONFIG_CHANGE_NOTIFY)
+		return -EINVAL;
+
+	writeb(data[1],
+		devpriv->mite->daq_io_addr + Rising_Edge_Detection_Enable(0));
+	writeb(data[1] >> 8,
+		devpriv->mite->daq_io_addr + Rising_Edge_Detection_Enable(1));
+	writeb(data[1] >> 16,
+		devpriv->mite->daq_io_addr + Rising_Edge_Detection_Enable(2));
+
+	writeb(data[2],
+		devpriv->mite->daq_io_addr + Falling_Edge_Detection_Enable(0));
+	writeb(data[2] >> 8,
+		devpriv->mite->daq_io_addr + Falling_Edge_Detection_Enable(1));
+	writeb(data[2] >> 16,
+		devpriv->mite->daq_io_addr + Falling_Edge_Detection_Enable(2));
+
+	return 2;
+}
+
+static int ni6527_attach(struct comedi_device * dev, struct comedi_devconfig * it)
+{
+	struct comedi_subdevice *s;
+	int ret;
+
+	printk("comedi%d: ni6527:", dev->minor);
+
+	if ((ret = alloc_private(dev, sizeof(struct ni6527_private))) < 0)
+		return ret;
+
+	ret = ni6527_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 = this_board->name;
+	printk(" %s", dev->board_name);
+
+	printk(" ID=0x%02x", readb(devpriv->mite->daq_io_addr + ID_Register));
+
+	if ((ret = alloc_subdevices(dev, 3)) < 0)
+		return ret;
+
+	s = dev->subdevices + 0;
+	s->type = COMEDI_SUBD_DI;
+	s->subdev_flags = SDF_READABLE;
+	s->n_chan = 24;
+	s->range_table = &range_digital;
+	s->maxdata = 1;
+	s->insn_config = ni6527_di_insn_config;
+	s->insn_bits = ni6527_di_insn_bits;
+
+	s = dev->subdevices + 1;
+	s->type = COMEDI_SUBD_DO;
+	s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
+	s->n_chan = 24;
+	s->range_table = &range_unknown;	/* FIXME: actually conductance */
+	s->maxdata = 1;
+	s->insn_bits = ni6527_do_insn_bits;
+
+	s = dev->subdevices + 2;
+	dev->read_subdev = s;
+	s->type = COMEDI_SUBD_DI;
+	s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
+	s->n_chan = 1;
+	s->range_table = &range_unknown;
+	s->maxdata = 1;
+	s->do_cmdtest = ni6527_intr_cmdtest;
+	s->do_cmd = ni6527_intr_cmd;
+	s->cancel = ni6527_intr_cancel;
+	s->insn_bits = ni6527_intr_insn_bits;
+	s->insn_config = ni6527_intr_insn_config;
+
+	writeb(0x00, devpriv->mite->daq_io_addr + Filter_Enable(0));
+	writeb(0x00, devpriv->mite->daq_io_addr + Filter_Enable(1));
+	writeb(0x00, devpriv->mite->daq_io_addr + Filter_Enable(2));
+
+	writeb(ClrEdge | ClrOverflow | ClrFilter | ClrInterval,
+		devpriv->mite->daq_io_addr + Clear_Register);
+	writeb(0x00, devpriv->mite->daq_io_addr + Master_Interrupt_Control);
+
+	ret = comedi_request_irq(mite_irq(devpriv->mite), ni6527_interrupt,
+		IRQF_SHARED, "ni6527", dev);
+	if (ret < 0) {
+		printk(" irq not available");
+	} else
+		dev->irq = mite_irq(devpriv->mite);
+
+	printk("\n");
+
+	return 0;
+}
+
+static int ni6527_detach(struct comedi_device * dev)
+{
+	if (devpriv && devpriv->mite && devpriv->mite->daq_io_addr) {
+		writeb(0x00,
+			devpriv->mite->daq_io_addr + Master_Interrupt_Control);
+	}
+
+	if (dev->irq) {
+		comedi_free_irq(dev->irq, dev);
+	}
+
+	if (devpriv && devpriv->mite) {
+		mite_unsetup(devpriv->mite);
+	}
+
+	return 0;
+}
+
+static int ni6527_find_device(struct 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_ni6527_boards; i++) {
+			if (mite_device_id(mite) == ni6527_boards[i].dev_id) {
+				dev->board_ptr = ni6527_boards + i;
+				devpriv->mite = mite;
+				return 0;
+			}
+		}
+	}
+	printk("no device found\n");
+	mite_list_devices();
+	return -EIO;
+}
+
+COMEDI_PCI_INITCLEANUP(driver_ni6527, ni6527_pci_table);