Staging: comedi: add me_daq driver

This adds the me_daq comedi driver to the build.

From: Michael Hillmann <hillmann@syscongroup.de>
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>

2 files changed, 860 insertions, 0 deletions

diff --git a/drivers/staging/comedi/drivers/Makefile b/drivers/staging/comedi/drivers/Makefile
index 3dbd4f1..eb7a615 100644
--- a/drivers/staging/comedi/drivers/Makefile
+++ b/drivers/staging/comedi/drivers/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_COMEDI)			+= comedi_parport.o
 # Comedi PCI drivers
 obj-$(CONFIG_COMEDI_PCI_DRIVERS)	+= mite.o
 obj-$(CONFIG_COMEDI_PCI_DRIVERS)	+= icp_multi.o
+obj-$(CONFIG_COMEDI_PCI_DRIVERS)	+= me_daq.o
 obj-$(CONFIG_COMEDI_PCI_DRIVERS)	+= me4000.o
 obj-$(CONFIG_COMEDI_PCI_DRIVERS)	+= rtd520.o
 obj-$(CONFIG_COMEDI_PCI_DRIVERS)	+= s626.o
diff --git a/drivers/staging/comedi/drivers/me_daq.c b/drivers/staging/comedi/drivers/me_daq.c
new file mode 100644
index 0000000..e741ec5
--- /dev/null
+++ b/drivers/staging/comedi/drivers/me_daq.c
@@ -0,0 +1,859 @@
+/*
+
+   comedi/drivers/me_daq.c
+
+   Hardware driver for Meilhaus data acquisition cards:
+
+     ME-2000i, ME-2600i, ME-3000vm1
+
+   Copyright (C) 2002 Michael Hillmann <hillmann@syscongroup.de>
+
+    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: me_daq
+Description: Meilhaus PCI data acquisition cards
+Author: Michael Hillmann <hillmann@syscongroup.de>
+Devices: [Meilhaus] ME-2600i (me_daq), ME-2000i
+Status: experimental
+
+Supports:
+
+    Analog Output
+
+Configuration options:
+
+    [0] - PCI bus number (optional)
+    [1] - PCI slot number (optional)
+
+    If bus/slot is not specified, the first available PCI
+    device will be used.
+
+The 2600 requires a firmware upload, which can be accomplished
+using the -i or --init-data option of comedi_config.
+The firmware can be
+found in the comedi_nonfree_firmware tarball available
+from http://www.comedi.org
+
+*/
+
+#include "../comedidev.h"
+
+#include "comedi_pci.h"
+
+//#include "me2600_fw.h"
+
+#define ME_DRIVER_NAME                 "me_daq"
+
+#define ME2000_DEVICE_ID               0x2000
+#define ME2600_DEVICE_ID               0x2600
+
+#define PLX_INTCSR                     0x4C	// PLX interrupt status register
+#define XILINX_DOWNLOAD_RESET          0x42	// Xilinx registers
+
+#define ME_CONTROL_1                   0x0000	// - | W
+#define   INTERRUPT_ENABLE             (1<<15)
+#define   COUNTER_B_IRQ                (1<<12)
+#define   COUNTER_A_IRQ                (1<<11)
+#define   CHANLIST_READY_IRQ           (1<<10)
+#define   EXT_IRQ                      (1<<9)
+#define   ADFIFO_HALFFULL_IRQ          (1<<8)
+#define   SCAN_COUNT_ENABLE            (1<<5)
+#define   SIMULTANEOUS_ENABLE          (1<<4)
+#define   TRIGGER_FALLING_EDGE         (1<<3)
+#define   CONTINUOUS_MODE              (1<<2)
+#define   DISABLE_ADC                  (0<<0)
+#define   SOFTWARE_TRIGGERED_ADC       (1<<0)
+#define   SCAN_TRIGGERED_ADC           (2<<0)
+#define   EXT_TRIGGERED_ADC            (3<<0)
+#define ME_ADC_START                   0x0000	// R | -
+#define ME_CONTROL_2                   0x0002	// - | W
+#define   ENABLE_ADFIFO                (1<<10)
+#define   ENABLE_CHANLIST              (1<<9)
+#define   ENABLE_PORT_B                (1<<7)
+#define   ENABLE_PORT_A                (1<<6)
+#define   ENABLE_COUNTER_B             (1<<4)
+#define   ENABLE_COUNTER_A             (1<<3)
+#define   ENABLE_DAC                   (1<<1)
+#define   BUFFERED_DAC                 (1<<0)
+#define ME_DAC_UPDATE                  0x0002	// R | -
+#define ME_STATUS                      0x0004	// R | -
+#define   COUNTER_B_IRQ_PENDING        (1<<12)
+#define   COUNTER_A_IRQ_PENDING        (1<<11)
+#define   CHANLIST_READY_IRQ_PENDING   (1<<10)
+#define   EXT_IRQ_PENDING              (1<<9)
+#define   ADFIFO_HALFFULL_IRQ_PENDING  (1<<8)
+#define   ADFIFO_FULL                  (1<<4)
+#define   ADFIFO_HALFFULL              (1<<3)
+#define   ADFIFO_EMPTY                 (1<<2)
+#define   CHANLIST_FULL                (1<<1)
+#define   FST_ACTIVE                   (1<<0)
+#define ME_RESET_INTERRUPT             0x0004	// - | W
+#define ME_DIO_PORT_A                  0x0006	// R | W
+#define ME_DIO_PORT_B                  0x0008	// R | W
+#define ME_TIMER_DATA_0                0x000A	// - | W
+#define ME_TIMER_DATA_1                0x000C	// - | W
+#define ME_TIMER_DATA_2                0x000E	// - | W
+#define ME_CHANNEL_LIST                0x0010	// - | W
+#define   ADC_UNIPOLAR                 (1<<6)
+#define   ADC_GAIN_0                   (0<<4)
+#define   ADC_GAIN_1                   (1<<4)
+#define   ADC_GAIN_2                   (2<<4)
+#define   ADC_GAIN_3                   (3<<4)
+#define ME_READ_AD_FIFO                0x0010	// R | -
+#define ME_DAC_CONTROL                 0x0012	// - | W
+#define   DAC_UNIPOLAR_D               (0<<4)
+#define   DAC_BIPOLAR_D                (1<<4)
+#define   DAC_UNIPOLAR_C               (0<<5)
+#define   DAC_BIPOLAR_C                (1<<5)
+#define   DAC_UNIPOLAR_B               (0<<6)
+#define   DAC_BIPOLAR_B                (1<<6)
+#define   DAC_UNIPOLAR_A               (0<<7)
+#define   DAC_BIPOLAR_A                (1<<7)
+#define   DAC_GAIN_0_D                 (0<<8)
+#define   DAC_GAIN_1_D                 (1<<8)
+#define   DAC_GAIN_0_C                 (0<<9)
+#define   DAC_GAIN_1_C                 (1<<9)
+#define   DAC_GAIN_0_B                 (0<<10)
+#define   DAC_GAIN_1_B                 (1<<10)
+#define   DAC_GAIN_0_A                 (0<<11)
+#define   DAC_GAIN_1_A                 (1<<11)
+#define ME_DAC_CONTROL_UPDATE          0x0012	// R | -
+#define ME_DAC_DATA_A                  0x0014	// - | W
+#define ME_DAC_DATA_B                  0x0016	// - | W
+#define ME_DAC_DATA_C                  0x0018	// - | W
+#define ME_DAC_DATA_D                  0x001A	// - | W
+#define ME_COUNTER_ENDDATA_A           0x001C	// - | W
+#define ME_COUNTER_ENDDATA_B           0x001E	// - | W
+#define ME_COUNTER_STARTDATA_A         0x0020	// - | W
+#define ME_COUNTER_VALUE_A             0x0020	// R | -
+#define ME_COUNTER_STARTDATA_B         0x0022	// - | W
+#define ME_COUNTER_VALUE_B             0x0022	// R | -
+
+//
+// Function prototypes
+//
+
+static int me_attach(comedi_device * dev, comedi_devconfig * it);
+static int me_detach(comedi_device * dev);
+
+static const comedi_lrange me2000_ai_range = {
+	8,
+	{
+			BIP_RANGE(10),
+			BIP_RANGE(5),
+			BIP_RANGE(2.5),
+			BIP_RANGE(1.25),
+			UNI_RANGE(10),
+			UNI_RANGE(5),
+			UNI_RANGE(2.5),
+			UNI_RANGE(1.25)
+		}
+};
+
+static const comedi_lrange me2600_ai_range = {
+	8,
+	{
+			BIP_RANGE(10),
+			BIP_RANGE(5),
+			BIP_RANGE(2.5),
+			BIP_RANGE(1.25),
+			UNI_RANGE(10),
+			UNI_RANGE(5),
+			UNI_RANGE(2.5),
+			UNI_RANGE(1.25)
+		}
+};
+
+static const comedi_lrange me2600_ao_range = {
+	3,
+	{
+			BIP_RANGE(10),
+			BIP_RANGE(5),
+			UNI_RANGE(10)
+		}
+};
+
+static DEFINE_PCI_DEVICE_TABLE(me_pci_table) = {
+	{PCI_VENDOR_ID_MEILHAUS, ME2600_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+		0},
+	{PCI_VENDOR_ID_MEILHAUS, ME2000_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+		0},
+	{0}
+};
+
+MODULE_DEVICE_TABLE(pci, me_pci_table);
+
+//
+// Board specification structure
+//
+
+typedef struct {
+	const char *name;	// driver name
+	int device_id;
+	int ao_channel_nbr;	// DA config
+	int ao_resolution;
+	int ao_resolution_mask;
+	const comedi_lrange *ao_range_list;
+	int ai_channel_nbr;	// AD config
+	int ai_resolution;
+	int ai_resolution_mask;
+	const comedi_lrange *ai_range_list;
+	int dio_channel_nbr;	// DIO config
+} me_board_struct;
+
+static const me_board_struct me_boards[] = {
+	{			// -- ME-2600i --
+	      name:	ME_DRIVER_NAME,
+	      device_id:ME2600_DEVICE_ID,
+	      ao_channel_nbr:4,// Analog Output
+	      ao_resolution:12,
+	      ao_resolution_mask:0x0fff,
+	      ao_range_list:&me2600_ao_range,
+	      ai_channel_nbr:16,
+			// Analog Input
+	      ai_resolution:12,
+	      ai_resolution_mask:0x0fff,
+	      ai_range_list:&me2600_ai_range,
+	      dio_channel_nbr:32,
+		},
+	{			// -- ME-2000i --
+	      name:	ME_DRIVER_NAME,
+	      device_id:ME2000_DEVICE_ID,
+	      ao_channel_nbr:0,// Analog Output
+	      ao_resolution:0,
+	      ao_resolution_mask:0,
+	      ao_range_list:0,
+	      ai_channel_nbr:16,
+			// Analog Input
+	      ai_resolution:12,
+	      ai_resolution_mask:0x0fff,
+	      ai_range_list:&me2000_ai_range,
+	      dio_channel_nbr:32,
+		}
+};
+
+#define me_board_nbr (sizeof(me_boards)/sizeof(me_board_struct))
+
+static comedi_driver me_driver = {
+      driver_name:ME_DRIVER_NAME,
+      module:THIS_MODULE,
+      attach:me_attach,
+      detach:me_detach,
+};
+
+COMEDI_PCI_INITCLEANUP(me_driver, me_pci_table);
+
+//
+// Private data structure
+//
+
+typedef struct {
+	struct pci_dev *pci_device;
+	void *plx_regbase;	// PLX configuration base address
+	void *me_regbase;	// Base address of the Meilhaus card
+	unsigned long plx_regbase_size;	// Size of PLX configuration space
+	unsigned long me_regbase_size;	// Size of Meilhaus space
+
+	unsigned short control_1;	// Mirror of CONTROL_1 register
+	unsigned short control_2;	// Mirror of CONTROL_2 register
+	unsigned short dac_control;	// Mirror of the DAC_CONTROL register
+	int ao_readback[4];	// Mirror of analog output data
+
+} me_private_data_struct;
+
+#define dev_private ((me_private_data_struct *)dev->private)
+
+// ------------------------------------------------------------------
+//
+// Helpful functions
+//
+// ------------------------------------------------------------------
+
+static __inline__ void sleep(unsigned sec)
+{
+	current->state = TASK_INTERRUPTIBLE;
+	schedule_timeout(sec * HZ);
+}
+
+// ------------------------------------------------------------------
+//
+// DIGITAL INPUT/OUTPUT SECTION
+//
+// ------------------------------------------------------------------
+
+static int me_dio_insn_config(comedi_device * dev,
+	comedi_subdevice * s, comedi_insn * insn, lsampl_t * data)
+{
+	int bits;
+	int mask = 1 << CR_CHAN(insn->chanspec);
+
+	/* calculate port */
+	if (mask & 0x0000ffff) {	/* Port A in use */
+		bits = 0x0000ffff;
+
+		/* Enable Port A */
+		dev_private->control_2 |= ENABLE_PORT_A;
+		writew(dev_private->control_2,
+			dev_private->me_regbase + ME_CONTROL_2);
+	} else {		/* Port B in use */
+
+		bits = 0xffff0000;
+
+		/* Enable Port B */
+		dev_private->control_2 |= ENABLE_PORT_B;
+		writew(dev_private->control_2,
+			dev_private->me_regbase + ME_CONTROL_2);
+	}
+
+	if (data[0]) {		/* Config port as output */
+		s->io_bits |= bits;
+	} else {		/* Config port as input */
+
+		s->io_bits &= ~bits;
+	}
+
+	return 1;
+}
+
+//
+// Digital instant input/outputs
+//
+
+static int me_dio_insn_bits(comedi_device * dev,
+	comedi_subdevice * s, comedi_insn * insn, lsampl_t * data)
+{
+	unsigned int mask = data[0];
+	s->state &= ~mask;
+	s->state |= (mask & data[1]);
+
+	mask &= s->io_bits;
+	if (mask & 0x0000ffff) {	/* Port A */
+		writew((s->state & 0xffff),
+			dev_private->me_regbase + ME_DIO_PORT_A);
+	} else {
+		data[1] &= ~0x0000ffff;
+		data[1] |= readw(dev_private->me_regbase + ME_DIO_PORT_A);
+	}
+
+	if (mask & 0xffff0000) {	/* Port B */
+		writew(((s->state >> 16) & 0xffff),
+			dev_private->me_regbase + ME_DIO_PORT_B);
+	} else {
+		data[1] &= ~0xffff0000;
+		data[1] |= readw(dev_private->me_regbase + ME_DIO_PORT_B) << 16;
+	}
+
+	return 2;
+}
+
+// ------------------------------------------------------------------
+//
+// ANALOG INPUT SECTION
+//
+// ------------------------------------------------------------------
+
+//
+// Analog instant input
+//
+static int me_ai_insn_read(comedi_device * dev,
+	comedi_subdevice * subdevice, comedi_insn * insn, lsampl_t * data)
+{
+	unsigned short value;
+	int chan = CR_CHAN((&insn->chanspec)[0]);
+	int rang = CR_RANGE((&insn->chanspec)[0]);
+	int aref = CR_AREF((&insn->chanspec)[0]);
+	int i;
+
+	/* stop any running conversion */
+	dev_private->control_1 &= 0xFFFC;
+	writew(dev_private->control_1, dev_private->me_regbase + ME_CONTROL_1);
+
+	/* clear chanlist and ad fifo */
+	dev_private->control_2 &= ~(ENABLE_ADFIFO | ENABLE_CHANLIST);
+	writew(dev_private->control_2, dev_private->me_regbase + ME_CONTROL_2);
+
+	/* reset any pending interrupt */
+	writew(0x00, dev_private->me_regbase + ME_RESET_INTERRUPT);
+
+	/* enable the chanlist and ADC fifo */
+	dev_private->control_2 |= (ENABLE_ADFIFO | ENABLE_CHANLIST);
+	writew(dev_private->control_2, dev_private->me_regbase + ME_CONTROL_2);
+
+	/* write to channel list fifo */
+	value = chan & 0x0f;	// b3:b0 are the channel number
+	value |= (rang & 0x03) << 4;	// b5:b4 are the channel gain
+	value |= (rang & 0x04) << 4;	// b6 channel polarity
+	value |= ((aref & AREF_DIFF) ? 0x80 : 0);	// b7 single or differential
+	writew(value & 0xff, dev_private->me_regbase + ME_CHANNEL_LIST);
+
+	/* set ADC mode to software trigger */
+	dev_private->control_1 |= SOFTWARE_TRIGGERED_ADC;
+	writew(dev_private->control_1, dev_private->me_regbase + ME_CONTROL_1);
+
+	/* start conversion by reading from ADC_START */
+	readw(dev_private->me_regbase + ME_ADC_START);
+
+	/* wait for ADC fifo not empty flag */
+	for (i = 100000; i > 0; i--) {
+		if (!(readw(dev_private->me_regbase + ME_STATUS) & 0x0004)) {
+			break;
+		}
+	}
+
+	/* get value from ADC fifo */
+	if (i) {
+		data[0] =
+			(readw(dev_private->me_regbase +
+				ME_READ_AD_FIFO) ^ 0x800) & 0x0FFF;
+	} else {
+		printk("comedi%d: Cannot get single value\n", dev->minor);
+		return -EIO;
+	}
+
+	/* stop any running conversion */
+	dev_private->control_1 &= 0xFFFC;
+	writew(dev_private->control_1, dev_private->me_regbase + ME_CONTROL_1);
+
+	return 1;
+}
+
+// ------------------------------------------------------------------
+//
+// HARDWARE TRIGGERED ANALOG INPUT SECTION
+//
+// ------------------------------------------------------------------
+
+//
+// Cancel analog input autoscan
+//
+static int me_ai_cancel(comedi_device * dev, comedi_subdevice * s)
+{
+	/* disable interrupts */
+
+	/* stop any running conversion */
+	dev_private->control_1 &= 0xFFFC;
+	writew(dev_private->control_1, dev_private->me_regbase + ME_CONTROL_1);
+
+	return 0;
+}
+
+//
+// Test analog input command
+//
+static int me_ai_do_cmd_test(comedi_device * dev,
+	comedi_subdevice * s, comedi_cmd * cmd)
+{
+	return 0;
+}
+
+//
+// Analog input command
+//
+static int me_ai_do_cmd(comedi_device * dev, comedi_subdevice * subdevice)
+{
+	return 0;
+}
+
+// ------------------------------------------------------------------
+//
+// ANALOG OUTPUT SECTION
+//
+// ------------------------------------------------------------------
+
+//
+// Analog instant output
+//
+static int me_ao_insn_write(comedi_device * dev,
+	comedi_subdevice * s, comedi_insn * insn, lsampl_t * data)
+{
+	int chan;
+	int rang;
+	int i;
+
+	/* Enable all DAC */
+	dev_private->control_2 |= ENABLE_DAC;
+	writew(dev_private->control_2, dev_private->me_regbase + ME_CONTROL_2);
+
+	/* and set DAC to "buffered" mode */
+	dev_private->control_2 |= BUFFERED_DAC;
+	writew(dev_private->control_2, dev_private->me_regbase + ME_CONTROL_2);
+
+	/* Set dac-control register */
+	for (i = 0; i < insn->n; i++) {
+		chan = CR_CHAN((&insn->chanspec)[i]);
+		rang = CR_RANGE((&insn->chanspec)[i]);
+
+		dev_private->dac_control &= ~(0x0880 >> chan);	/* clear bits for this channel */
+		if (rang == 0)
+			dev_private->dac_control |=
+				((DAC_BIPOLAR_A | DAC_GAIN_1_A) >> chan);
+		else if (rang == 1)
+			dev_private->dac_control |=
+				((DAC_BIPOLAR_A | DAC_GAIN_0_A) >> chan);
+	}
+	writew(dev_private->dac_control,
+		dev_private->me_regbase + ME_DAC_CONTROL);
+
+	/* Update dac-control register */
+	readw(dev_private->me_regbase + ME_DAC_CONTROL_UPDATE);
+
+	/* Set data register */
+	for (i = 0; i < insn->n; i++) {
+		chan = CR_CHAN((&insn->chanspec)[i]);
+		writew((data[0] & s->maxdata),
+			dev_private->me_regbase + ME_DAC_DATA_A + (chan << 1));
+		dev_private->ao_readback[chan] = (data[0] & s->maxdata);
+	}
+
+	/* Update dac with data registers */
+	readw(dev_private->me_regbase + ME_DAC_UPDATE);
+
+	return i;
+}
+
+//
+// Analog output readback
+//
+static int me_ao_insn_read(comedi_device * dev,
+	comedi_subdevice * s, comedi_insn * insn, lsampl_t * data)
+{
+	int i;
+
+	for (i = 0; i < insn->n; i++) {
+		data[i] =
+			dev_private->ao_readback[CR_CHAN((&insn->chanspec)[i])];
+	}
+
+	return 1;
+}
+
+// ------------------------------------------------------------------
+//
+// INITIALISATION SECTION
+//
+// ------------------------------------------------------------------
+
+//
+// Xilinx firmware download for card: ME-2600i
+//
+
+static int me2600_xilinx_download(comedi_device * dev, unsigned char
+	*me2600_firmware, unsigned int length)
+{
+	unsigned int value;
+	unsigned int file_length;
+	unsigned int i;
+
+	/* disable irq's on PLX */
+	writel(0x00, dev_private->plx_regbase + PLX_INTCSR);
+
+	/* First, make a dummy read to reset xilinx */
+	value = readw(dev_private->me_regbase + XILINX_DOWNLOAD_RESET);
+
+	/* Wait until reset is over */
+	sleep(1);
+
+	/* Write a dummy value to Xilinx */
+	writeb(0x00, dev_private->me_regbase + 0x0);
+	sleep(1);
+
+	/*
+	 * Format of the firmware
+	 * Build longs from the byte-wise coded header
+	 * Byte 1-3:   length of the array
+	 * Byte 4-7:   version
+	 * Byte 8-11:  date
+	 * Byte 12-15: reserved
+	 */
+	if (length < 16)
+		return -EINVAL;
+	file_length =
+		(((unsigned int)me2600_firmware[0] & 0xff) << 24) +
+		(((unsigned int)me2600_firmware[1] & 0xff) << 16) +
+		(((unsigned int)me2600_firmware[2] & 0xff) << 8) +
+		((unsigned int)me2600_firmware[3] & 0xff);
+
+	/*
+	 * Loop for writing firmware byte by byte to xilinx
+	 * Firmware data start at offfset 16
+	 */
+	for (i = 0; i < file_length; i++) {
+		writeb((me2600_firmware[16 + i] & 0xff),
+			dev_private->me_regbase + 0x0);
+	}
+
+	/* Write 5 dummy values to xilinx */
+	for (i = 0; i < 5; i++) {
+		writeb(0x00, dev_private->me_regbase + 0x0);
+	}
+
+	/* Test if there was an error during download -> INTB was thrown */
+	value = readl(dev_private->plx_regbase + PLX_INTCSR);
+	if (value & 0x20) {
+		/* Disable interrupt */
+		writel(0x00, dev_private->plx_regbase + PLX_INTCSR);
+		printk("comedi%d: Xilinx download failed\n", dev->minor);
+		return -EIO;
+	}
+
+	/* Wait until the Xilinx is ready for real work */
+	sleep(1);
+
+	/* Enable PLX-Interrupts */
+	writel(0x43, dev_private->plx_regbase + PLX_INTCSR);
+
+	return 0;
+}
+
+//
+// Reset device
+//
+
+static int me_reset(comedi_device * dev)
+{
+	/* Reset board */
+	writew(0x00, dev_private->me_regbase + ME_CONTROL_1);
+	writew(0x00, dev_private->me_regbase + ME_CONTROL_2);
+	writew(0x00, dev_private->me_regbase + ME_RESET_INTERRUPT);
+	writew(0x00, dev_private->me_regbase + ME_DAC_CONTROL);
+
+	/* Save values in the board context */
+	dev_private->dac_control = 0;
+	dev_private->control_1 = 0;
+	dev_private->control_2 = 0;
+
+	return 0;
+}
+
+//
+// Attach
+//
+//  - Register PCI device
+//  - Declare device driver capability
+//
+
+static int me_attach(comedi_device * dev, comedi_devconfig * it)
+{
+	struct pci_dev *pci_device;
+	comedi_subdevice *subdevice;
+	me_board_struct *board;
+	resource_size_t plx_regbase_tmp;
+	unsigned long plx_regbase_size_tmp;
+	resource_size_t me_regbase_tmp;
+	unsigned long me_regbase_size_tmp;
+	resource_size_t swap_regbase_tmp;
+	unsigned long swap_regbase_size_tmp;
+	resource_size_t regbase_tmp;
+	int result, error, i;
+
+	// Allocate private memory
+	if (alloc_private(dev, sizeof(me_private_data_struct)) < 0) {
+		return -ENOMEM;
+	}
+//
+// Probe the device to determine what device in the series it is.
+//
+	for (pci_device = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
+		pci_device != NULL;
+		pci_device =
+		pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_device)) {
+		if (pci_device->vendor == PCI_VENDOR_ID_MEILHAUS) {
+			for (i = 0; i < me_board_nbr; i++) {
+				if (me_boards[i].device_id ==
+					pci_device->device) {
+					// was a particular bus/slot requested?
+					if ((it->options[0] != 0)
+						|| (it->options[1] != 0)) {
+						// are we on the wrong bus/slot?
+						if (pci_device->bus->number !=
+							it->options[0]
+							|| PCI_SLOT(pci_device->
+								devfn) !=
+							it->options[1]) {
+							continue;
+						}
+					}
+
+					dev->board_ptr = me_boards + i;
+					board = (me_board_struct *) dev->
+						board_ptr;
+					dev_private->pci_device = pci_device;
+					goto found;
+				}
+			}
+		}
+	}
+
+	printk("comedi%d: no supported board found! (req. bus/slot : %d/%d)\n",
+		dev->minor, it->options[0], it->options[1]);
+	return -EIO;
+
+      found:
+
+	printk("comedi%d: found %s at PCI bus %d, slot %d\n",
+		dev->minor, me_boards[i].name,
+		pci_device->bus->number, PCI_SLOT(pci_device->devfn));
+
+	// Enable PCI device and request PCI regions
+	if (comedi_pci_enable(pci_device, ME_DRIVER_NAME) < 0) {
+		printk("comedi%d: Failed to enable PCI device and request regions\n", dev->minor);
+		return -EIO;
+	}
+	// Set data in device structure
+
+	dev->board_name = board->name;
+
+	// Read PLX register base address [PCI_BASE_ADDRESS #0].
+
+	plx_regbase_tmp = pci_resource_start(pci_device, 0);
+	plx_regbase_size_tmp = pci_resource_len(pci_device, 0);
+	dev_private->plx_regbase =
+		ioremap(plx_regbase_tmp, plx_regbase_size_tmp);
+	dev_private->plx_regbase_size = plx_regbase_size_tmp;
+	if (!dev_private->plx_regbase) {
+		printk("comedi%d: Failed to remap I/O memory\n", dev->minor);
+		return -ENOMEM;
+	}
+	// Read Swap base address [PCI_BASE_ADDRESS #5].
+
+	swap_regbase_tmp = pci_resource_start(pci_device, 5);
+	swap_regbase_size_tmp = pci_resource_len(pci_device, 5);
+
+	if (!swap_regbase_tmp) {
+		printk("comedi%d: Swap not present\n", dev->minor);
+	}
+
+  /*----------------------------------------------------- Workaround start ---*/
+	if (plx_regbase_tmp & 0x0080) {
+		printk("comedi%d: PLX-Bug detected\n", dev->minor);
+
+		if (swap_regbase_tmp) {
+			regbase_tmp = plx_regbase_tmp;
+			plx_regbase_tmp = swap_regbase_tmp;
+			swap_regbase_tmp = regbase_tmp;
+
+			result = pci_write_config_dword(pci_device,
+				PCI_BASE_ADDRESS_0, plx_regbase_tmp);
+			if (result != PCIBIOS_SUCCESSFUL)
+				return -EIO;
+
+			result = pci_write_config_dword(pci_device,
+				PCI_BASE_ADDRESS_5, swap_regbase_tmp);
+			if (result != PCIBIOS_SUCCESSFUL)
+				return -EIO;
+		} else {
+			plx_regbase_tmp -= 0x80;
+			result = pci_write_config_dword(pci_device,
+				PCI_BASE_ADDRESS_0, plx_regbase_tmp);
+			if (result != PCIBIOS_SUCCESSFUL)
+				return -EIO;
+		}
+	}
+  /*----------------------------------------------------- Workaround end -----*/
+
+	// Read Meilhaus register base address [PCI_BASE_ADDRESS #2].
+
+	me_regbase_tmp = pci_resource_start(pci_device, 2);
+	me_regbase_size_tmp = pci_resource_len(pci_device, 2);
+	dev_private->me_regbase_size = me_regbase_size_tmp;
+	dev_private->me_regbase = ioremap(me_regbase_tmp, me_regbase_size_tmp);
+	if (!dev_private->me_regbase) {
+		printk("comedi%d: Failed to remap I/O memory\n", dev->minor);
+		return -ENOMEM;
+	}
+	// Download firmware and reset card
+	if (board->device_id == ME2600_DEVICE_ID) {
+		unsigned char *aux_data;
+		int aux_len;
+
+		aux_data = comedi_aux_data(it->options, 0);
+		aux_len = it->options[COMEDI_DEVCONF_AUX_DATA_LENGTH];
+
+		if (!aux_data || aux_len < 1) {
+			comedi_error(dev,
+				"You must provide me2600 firmware using the --init-data option of comedi_config");
+			return -EINVAL;
+		}
+		me2600_xilinx_download(dev, aux_data, aux_len);
+	}
+
+	me_reset(dev);
+
+	// device driver capabilities
+
+	if ((error = alloc_subdevices(dev, 3)) < 0)
+		return error;
+
+	subdevice = dev->subdevices + 0;
+	subdevice->type = COMEDI_SUBD_AI;
+	subdevice->subdev_flags = SDF_READABLE | SDF_COMMON | SDF_CMD_READ;
+	subdevice->n_chan = board->ai_channel_nbr;
+	subdevice->maxdata = board->ai_resolution_mask;
+	subdevice->len_chanlist = board->ai_channel_nbr;
+	subdevice->range_table = board->ai_range_list;
+	subdevice->cancel = me_ai_cancel;
+	subdevice->insn_read = me_ai_insn_read;
+	subdevice->do_cmdtest = me_ai_do_cmd_test;
+	subdevice->do_cmd = me_ai_do_cmd;
+
+	subdevice = dev->subdevices + 1;
+	subdevice->type = COMEDI_SUBD_AO;
+	subdevice->subdev_flags = SDF_WRITEABLE | SDF_COMMON;
+	subdevice->n_chan = board->ao_channel_nbr;
+	subdevice->maxdata = board->ao_resolution_mask;
+	subdevice->len_chanlist = board->ao_channel_nbr;
+	subdevice->range_table = board->ao_range_list;
+	subdevice->insn_read = me_ao_insn_read;
+	subdevice->insn_write = me_ao_insn_write;
+
+	subdevice = dev->subdevices + 2;
+	subdevice->type = COMEDI_SUBD_DIO;
+	subdevice->subdev_flags = SDF_READABLE | SDF_WRITEABLE;
+	subdevice->n_chan = board->dio_channel_nbr;
+	subdevice->maxdata = 1;
+	subdevice->len_chanlist = board->dio_channel_nbr;
+	subdevice->range_table = &range_digital;
+	subdevice->insn_bits = me_dio_insn_bits;
+	subdevice->insn_config = me_dio_insn_config;
+	subdevice->io_bits = 0;
+
+	printk("comedi%d: " ME_DRIVER_NAME " attached.\n", dev->minor);
+	return 0;
+}
+
+//
+// Detach
+//
+
+static int me_detach(comedi_device * dev)
+{
+	if (dev_private) {
+		if (dev_private->me_regbase) {
+			me_reset(dev);
+			iounmap(dev_private->me_regbase);
+		}
+		if (dev_private->plx_regbase)
+			iounmap(dev_private->plx_regbase);
+		if (dev_private->pci_device) {
+			if (dev_private->plx_regbase_size) {
+				comedi_pci_disable(dev_private->pci_device);
+			}
+			pci_dev_put(dev_private->pci_device);
+		}
+	}
+	return 0;
+}