Staging: comedi: add ni_labpc drivers

This supports National Instruments Lab-PC and compatibles

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

drivers/staging/comedi/drivers/ni_labpc.h

@@ -0,0 +1,85 @@
+/*
+    ni_labpc.h
+
+    Header for ni_labpc.c and ni_labpc_cs.c
+
+    Copyright (C) 2003 Frank Mori Hess <fmhess@users.sourceforge.net>
+
+    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.
+
+*/
+
+#ifndef _NI_LABPC_H
+#define _NI_LABPC_H
+
+#define EEPROM_SIZE	256	// 256 byte eeprom
+#define NUM_AO_CHAN	2	// boards have two analog output channels
+
+enum labpc_bustype { isa_bustype, pci_bustype, pcmcia_bustype };
+enum labpc_register_layout { labpc_plus_layout, labpc_1200_layout };
+enum transfer_type { fifo_not_empty_transfer, fifo_half_full_transfer,
+		isa_dma_transfer };
+
+typedef struct labpc_board_struct {
+	const char *name;
+	int device_id;		// device id for pci and pcmcia boards
+	int ai_speed;		// maximum input speed in nanoseconds
+	enum labpc_bustype bustype;	// ISA/PCI/etc.
+	enum labpc_register_layout register_layout;	// 1200 has extra registers compared to pc+
+	int has_ao;		// has analog output true/false
+	const comedi_lrange *ai_range_table;
+	const int *ai_range_code;
+	const int *ai_range_is_unipolar;
+	unsigned ai_scan_up:1;	// board can auto scan up in ai channels, not just down
+	unsigned memory_mapped_io:1;	/* uses memory mapped io instead of ioports */
+} labpc_board;
+
+typedef struct {
+	struct mite_struct *mite;	// for mite chip on pci-1200
+	volatile unsigned long long count;	/* number of data points left to be taken */
+	unsigned int ao_value[NUM_AO_CHAN];	// software copy of analog output values
+	// software copys of bits written to command registers
+	volatile unsigned int command1_bits;
+	volatile unsigned int command2_bits;
+	volatile unsigned int command3_bits;
+	volatile unsigned int command4_bits;
+	volatile unsigned int command5_bits;
+	volatile unsigned int command6_bits;
+	// store last read of board status registers
+	volatile unsigned int status1_bits;
+	volatile unsigned int status2_bits;
+	unsigned int divisor_a0;	/* value to load into board's counter a0 (conversion pacing) for timed conversions */
+	unsigned int divisor_b0;	/* value to load into board's counter b0 (master) for timed conversions */
+	unsigned int divisor_b1;	/* value to load into board's counter b1 (scan pacing) for timed conversions */
+	unsigned int dma_chan;	// dma channel to use
+	u16 *dma_buffer;	// buffer ai will dma into
+	unsigned int dma_transfer_size;	// transfer size in bytes for current transfer
+	enum transfer_type current_transfer;	// we are using dma/fifo-half-full/etc.
+	unsigned int eeprom_data[EEPROM_SIZE];	// stores contents of board's eeprom
+	unsigned int caldac[16];	// stores settings of calibration dacs
+	// function pointers so we can use inb/outb or readb/writeb as appropriate
+	unsigned int (*read_byte) (unsigned long address);
+	void (*write_byte) (unsigned int byte, unsigned long address);
+} labpc_private;
+
+int labpc_common_attach(comedi_device * dev, unsigned long iobase,
+	unsigned int irq, unsigned int dma);
+int labpc_common_detach(comedi_device * dev);
+
+extern const int labpc_1200_is_unipolar[];
+extern const int labpc_1200_ai_gain_bits[];
+extern const comedi_lrange range_labpc_1200_ai;
+
+#endif /* _NI_LABPC_H */

drivers/staging/comedi/drivers/ni_labpc_cs.c

@@ -0,0 +1,574 @@
+/*
+    comedi/drivers/ni_labpc_cs.c
+    Driver for National Instruments daqcard-1200 boards
+    Copyright (C) 2001, 2002, 2003 Frank Mori Hess <fmhess@users.sourceforge.net>
+
+    PCMCIA crap is adapted from dummy_cs.c 1.31 2001/08/24 12:13:13
+    from the pcmcia package.
+    The initial developer of the pcmcia dummy_cs.c code is David A. Hinds
+    <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
+    are Copyright (C) 1999 David A. Hinds.
+
+    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_labpc_cs
+Description: National Instruments Lab-PC (& compatibles)
+Author: Frank Mori Hess <fmhess@users.sourceforge.net>
+Devices: [National Instruments] DAQCard-1200 (daqcard-1200)
+Status: works
+
+Thanks go to Fredrik Lingvall for much testing and perseverance in
+helping to debug daqcard-1200 support.
+
+The 1200 series boards have onboard calibration dacs for correcting
+analog input/output offsets and gains.  The proper settings for these
+caldacs are stored on the board's eeprom.  To read the caldac values
+from the eeprom and store them into a file that can be then be used by
+comedilib, use the comedi_calibrate program.
+
+Configuration options:
+  none
+
+The daqcard-1200 has quirky chanlist requirements
+when scanning multiple channels.  Multiple channel scan
+sequence must start at highest channel, then decrement down to
+channel 0.  Chanlists consisting of all one channel
+are also legal, and allow you to pace conversions in bursts.
+
+*/
+
+/*
+
+NI manuals:
+340988a (daqcard-1200)
+
+*/
+
+#undef LABPC_DEBUG
+//#define LABPC_DEBUG   // enable debugging messages
+
+#include "../comedidev.h"
+
+#include <linux/delay.h>
+#include <linux/version.h>
+
+#include "8253.h"
+#include "8255.h"
+#include "comedi_fc.h"
+#include "ni_labpc.h"
+
+#include <pcmcia/cs_types.h>
+#include <pcmcia/cs.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/cisreg.h>
+#include <pcmcia/ds.h>
+
+static struct pcmcia_device *pcmcia_cur_dev = NULL;
+
+static int labpc_attach(comedi_device * dev, comedi_devconfig * it);
+
+static const labpc_board labpc_cs_boards[] = {
+	{
+	      name:	"daqcard-1200",
+	      device_id:0x103,	// 0x10b is manufacturer id, 0x103 is device id
+	      ai_speed:10000,
+	      bustype:	pcmcia_bustype,
+	      register_layout:labpc_1200_layout,
+	      has_ao:	1,
+	      ai_range_table:&range_labpc_1200_ai,
+	      ai_range_code:labpc_1200_ai_gain_bits,
+	      ai_range_is_unipolar:labpc_1200_is_unipolar,
+	      ai_scan_up:0,
+	      memory_mapped_io:0,
+		},
+	/* duplicate entry, to support using alternate name */
+	{
+	      name:	"ni_labpc_cs",
+	      device_id:0x103,
+	      ai_speed:10000,
+	      bustype:	pcmcia_bustype,
+	      register_layout:labpc_1200_layout,
+	      has_ao:	1,
+	      ai_range_table:&range_labpc_1200_ai,
+	      ai_range_code:labpc_1200_ai_gain_bits,
+	      ai_range_is_unipolar:labpc_1200_is_unipolar,
+	      ai_scan_up:0,
+	      memory_mapped_io:0,
+		},
+};
+
+/*
+ * Useful for shorthand access to the particular board structure
+ */
+#define thisboard ((const labpc_board *)dev->board_ptr)
+
+static comedi_driver driver_labpc_cs = {
+	.driver_name = "ni_labpc_cs",
+	.module = THIS_MODULE,
+	.attach = &labpc_attach,
+	.detach = &labpc_common_detach,
+	.num_names = sizeof(labpc_cs_boards) / sizeof(labpc_board),
+	.board_name = &labpc_cs_boards[0].name,
+	.offset = sizeof(labpc_board),
+};
+
+static int labpc_attach(comedi_device * dev, comedi_devconfig * it)
+{
+	unsigned long iobase = 0;
+	unsigned int irq = 0;
+	struct pcmcia_device *link;
+
+	/* allocate and initialize dev->private */
+	if (alloc_private(dev, sizeof(labpc_private)) < 0)
+		return -ENOMEM;
+
+	// get base address, irq etc. based on bustype
+	switch (thisboard->bustype) {
+	case pcmcia_bustype:
+		link = pcmcia_cur_dev;	/* XXX hack */
+		if (!link)
+			return -EIO;
+		iobase = link->io.BasePort1;
+		irq = link->irq.AssignedIRQ;
+		break;
+	default:
+		printk("bug! couldn't determine board type\n");
+		return -EINVAL;
+		break;
+	}
+	return labpc_common_attach(dev, iobase, irq, 0);
+}
+
+/*
+   All the PCMCIA modules use PCMCIA_DEBUG to control debugging.  If
+   you do not define PCMCIA_DEBUG at all, all the debug code will be
+   left out.  If you compile with PCMCIA_DEBUG=0, the debug code will
+   be present but disabled -- but it can then be enabled for specific
+   modules at load time with a 'pc_debug=#' option to insmod.
+*/
+#ifdef PCMCIA_DEBUG
+static int pc_debug = PCMCIA_DEBUG;
+module_param(pc_debug, int, 0644);
+#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
+static const char *version =
+	"ni_labpc.c, based on dummy_cs.c 1.31 2001/08/24 12:13:13";
+#else
+#define DEBUG(n, args...)
+#endif
+
+/*====================================================================*/
+
+/*
+   The event() function is this driver's Card Services event handler.
+   It will be called by Card Services when an appropriate card status
+   event is received.  The config() and release() entry points are
+   used to configure or release a socket, in response to card
+   insertion and ejection events.  They are invoked from the dummy
+   event handler.
+
+   Kernel version 2.6.16 upwards uses suspend() and resume() functions
+   instead of an event() function.
+*/
+
+static void labpc_config(struct pcmcia_device *link);
+static void labpc_release(struct pcmcia_device *link);
+static int labpc_cs_suspend(struct pcmcia_device *p_dev);
+static int labpc_cs_resume(struct pcmcia_device *p_dev);
+
+/*
+   The attach() and detach() entry points are used to create and destroy
+   "instances" of the driver, where each instance represents everything
+   needed to manage one actual PCMCIA card.
+*/
+
+static int labpc_cs_attach(struct pcmcia_device *);
+static void labpc_cs_detach(struct pcmcia_device *);
+
+/*
+   You'll also need to prototype all the functions that will actually
+   be used to talk to your device.  See 'memory_cs' for a good example
+   of a fully self-sufficient driver; the other drivers rely more or
+   less on other parts of the kernel.
+*/
+
+/*
+   The dev_info variable is the "key" that is used to match up this
+   device driver with appropriate cards, through the card configuration
+   database.
+*/
+
+static const dev_info_t dev_info = "daqcard-1200";
+
+typedef struct local_info_t {
+	struct pcmcia_device *link;
+	dev_node_t node;
+	int stop;
+	struct bus_operations *bus;
+} local_info_t;
+
+/*======================================================================
+
+    labpc_cs_attach() creates an "instance" of the driver, allocating
+    local data structures for one device.  The device is registered
+    with Card Services.
+
+    The dev_link structure is initialized, but we don't actually
+    configure the card at this point -- we wait until we receive a
+    card insertion event.
+
+======================================================================*/
+
+static int labpc_cs_attach(struct pcmcia_device *link)
+{
+	local_info_t *local;
+
+	DEBUG(0, "labpc_cs_attach()\n");
+
+	/* Allocate space for private device-specific data */
+	local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
+	if (!local)
+		return -ENOMEM;
+	local->link = link;
+	link->priv = local;
+
+	/* Interrupt setup */
+	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_FORCED_PULSE;
+	link->irq.IRQInfo1 = IRQ_INFO2_VALID | IRQ_PULSE_ID;
+	link->irq.Handler = NULL;
+
+	/*
+	   General socket configuration defaults can go here.  In this
+	   client, we assume very little, and rely on the CIS for almost
+	   everything.  In most clients, many details (i.e., number, sizes,
+	   and attributes of IO windows) are fixed by the nature of the
+	   device, and can be hard-wired here.
+	 */
+	link->conf.Attributes = 0;
+	link->conf.IntType = INT_MEMORY_AND_IO;
+
+	pcmcia_cur_dev = link;
+
+	labpc_config(link);
+
+	return 0;
+}				/* labpc_cs_attach */
+
+/*======================================================================
+
+    This deletes a driver "instance".  The device is de-registered
+    with Card Services.  If it has been released, all local data
+    structures are freed.  Otherwise, the structures will be freed
+    when the device is released.
+
+======================================================================*/
+
+static void labpc_cs_detach(struct pcmcia_device *link)
+{
+	DEBUG(0, "labpc_cs_detach(0x%p)\n", link);
+
+	/*
+	   If the device is currently configured and active, we won't
+	   actually delete it yet.  Instead, it is marked so that when
+	   the release() function is called, that will trigger a proper
+	   detach().
+	 */
+	if (link->dev_node) {
+		((local_info_t *) link->priv)->stop = 1;
+		labpc_release(link);
+	}
+
+	/* This points to the parent local_info_t struct */
+	if (link->priv)
+		kfree(link->priv);
+
+}				/* labpc_cs_detach */
+
+/*======================================================================
+
+    labpc_config() is scheduled to run after a CARD_INSERTION event
+    is received, to configure the PCMCIA socket, and to make the
+    device available to the system.
+
+======================================================================*/
+
+static void labpc_config(struct pcmcia_device *link)
+{
+	local_info_t *dev = link->priv;
+	tuple_t tuple;
+	cisparse_t parse;
+	int last_ret;
+	u_char buf[64];
+	win_req_t req;
+	memreq_t map;
+	cistpl_cftable_entry_t dflt = { 0 };
+
+	DEBUG(0, "labpc_config(0x%p)\n", link);
+
+	/*
+	   This reads the card's CONFIG tuple to find its configuration
+	   registers.
+	 */
+	tuple.DesiredTuple = CISTPL_CONFIG;
+	tuple.Attributes = 0;
+	tuple.TupleData = buf;
+	tuple.TupleDataMax = sizeof(buf);
+	tuple.TupleOffset = 0;
+	if ((last_ret = pcmcia_get_first_tuple(link, &tuple))) {
+		cs_error(link, GetFirstTuple, last_ret);
+		goto cs_failed;
+	}
+	if ((last_ret = pcmcia_get_tuple_data(link, &tuple))) {
+		cs_error(link, GetTupleData, last_ret);
+		goto cs_failed;
+	}
+	if ((last_ret = pcmcia_parse_tuple(&tuple, &parse))) {
+		cs_error(link, ParseTuple, last_ret);
+		goto cs_failed;
+	}
+	link->conf.ConfigBase = parse.config.base;
+	link->conf.Present = parse.config.rmask[0];
+
+	/*
+	   In this loop, we scan the CIS for configuration table entries,
+	   each of which describes a valid card configuration, including
+	   voltage, IO window, memory window, and interrupt settings.
+
+	   We make no assumptions about the card to be configured: we use
+	   just the information available in the CIS.  In an ideal world,
+	   this would work for any PCMCIA card, but it requires a complete
+	   and accurate CIS.  In practice, a driver usually "knows" most of
+	   these things without consulting the CIS, and most client drivers
+	   will only use the CIS to fill in implementation-defined details.
+	 */
+	tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
+	if ((last_ret = pcmcia_get_first_tuple(link, &tuple))) {
+		cs_error(link, GetFirstTuple, last_ret);
+		goto cs_failed;
+	}
+	while (1) {
+		cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
+		if (pcmcia_get_tuple_data(link, &tuple))
+			goto next_entry;
+		if (pcmcia_parse_tuple(&tuple, &parse))
+			goto next_entry;
+
+		if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
+			dflt = *cfg;
+		if (cfg->index == 0)
+			goto next_entry;
+		link->conf.ConfigIndex = cfg->index;
+
+		/* Does this card need audio output? */
+		if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
+			link->conf.Attributes |= CONF_ENABLE_SPKR;
+			link->conf.Status = CCSR_AUDIO_ENA;
+		}
+
+		/* Do we need to allocate an interrupt? */
+		if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1)
+			link->conf.Attributes |= CONF_ENABLE_IRQ;
+
+		/* IO window settings */
+		link->io.NumPorts1 = link->io.NumPorts2 = 0;
+		if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
+			cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
+			link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
+			link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
+			link->io.BasePort1 = io->win[0].base;
+			link->io.NumPorts1 = io->win[0].len;
+			if (io->nwin > 1) {
+				link->io.Attributes2 = link->io.Attributes1;
+				link->io.BasePort2 = io->win[1].base;
+				link->io.NumPorts2 = io->win[1].len;
+			}
+			/* This reserves IO space but doesn't actually enable it */
+			if (pcmcia_request_io(link, &link->io))
+				goto next_entry;
+		}
+
+		if ((cfg->mem.nwin > 0) || (dflt.mem.nwin > 0)) {
+			cistpl_mem_t *mem =
+				(cfg->mem.nwin) ? &cfg->mem : &dflt.mem;
+			req.Attributes = WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM;
+			req.Attributes |= WIN_ENABLE;
+			req.Base = mem->win[0].host_addr;
+			req.Size = mem->win[0].len;
+			if (req.Size < 0x1000)
+				req.Size = 0x1000;
+			req.AccessSpeed = 0;
+			link->win = (window_handle_t) link;
+			if (pcmcia_request_window(&link, &req, &link->win))
+				goto next_entry;
+			map.Page = 0;
+			map.CardOffset = mem->win[0].card_addr;
+			if (pcmcia_map_mem_page(link->win, &map))
+				goto next_entry;
+		}
+		/* If we got this far, we're cool! */
+		break;
+
+	      next_entry:
+		if ((last_ret = pcmcia_get_next_tuple(link, &tuple))) {
+			cs_error(link, GetNextTuple, last_ret);
+			goto cs_failed;
+		}
+	}
+
+	/*
+	   Allocate an interrupt line.  Note that this does not assign a
+	   handler to the interrupt, unless the 'Handler' member of the
+	   irq structure is initialized.
+	 */
+	if (link->conf.Attributes & CONF_ENABLE_IRQ)
+		if ((last_ret = pcmcia_request_irq(link, &link->irq))) {
+			cs_error(link, RequestIRQ, last_ret);
+			goto cs_failed;
+		}
+
+	/*
+	   This actually configures the PCMCIA socket -- setting up
+	   the I/O windows and the interrupt mapping, and putting the
+	   card and host interface into "Memory and IO" mode.
+	 */
+	if ((last_ret = pcmcia_request_configuration(link, &link->conf))) {
+		cs_error(link, RequestConfiguration, last_ret);
+		goto cs_failed;
+	}
+
+	/*
+	   At this point, the dev_node_t structure(s) need to be
+	   initialized and arranged in a linked list at link->dev.
+	 */
+	sprintf(dev->node.dev_name, "daqcard-1200");
+	dev->node.major = dev->node.minor = 0;
+	link->dev_node = &dev->node;
+
+	/* Finally, report what we've done */
+	printk(KERN_INFO "%s: index 0x%02x",
+		dev->node.dev_name, link->conf.ConfigIndex);
+	if (link->conf.Attributes & CONF_ENABLE_IRQ)
+		printk(", irq %d", link->irq.AssignedIRQ);
+	if (link->io.NumPorts1)
+		printk(", io 0x%04x-0x%04x", link->io.BasePort1,
+			link->io.BasePort1 + link->io.NumPorts1 - 1);
+	if (link->io.NumPorts2)
+		printk(" & 0x%04x-0x%04x", link->io.BasePort2,
+			link->io.BasePort2 + link->io.NumPorts2 - 1);
+	if (link->win)
+		printk(", mem 0x%06lx-0x%06lx", req.Base,
+			req.Base + req.Size - 1);
+	printk("\n");
+
+	return;
+
+      cs_failed:
+	labpc_release(link);
+
+}				/* labpc_config */
+
+static void labpc_release(struct pcmcia_device *link)
+{
+	DEBUG(0, "labpc_release(0x%p)\n", link);
+
+	pcmcia_disable_device(link);
+}				/* labpc_release */
+
+/*======================================================================
+
+    The card status event handler.  Mostly, this schedules other
+    stuff to run after an event is received.
+
+    When a CARD_REMOVAL event is received, we immediately set a
+    private flag to block future accesses to this device.  All the
+    functions that actually access the device should check this flag
+    to make sure the card is still present.
+
+======================================================================*/
+
+static int labpc_cs_suspend(struct pcmcia_device *link)
+{
+	local_info_t *local = link->priv;
+
+	/* Mark the device as stopped, to block IO until later */
+	local->stop = 1;
+	return 0;
+}				/* labpc_cs_suspend */
+
+static int labpc_cs_resume(struct pcmcia_device *link)
+{
+	local_info_t *local = link->priv;
+
+	local->stop = 0;
+	return 0;
+}				/* labpc_cs_resume */
+
+/*====================================================================*/
+
+static struct pcmcia_device_id labpc_cs_ids[] = {
+	/* N.B. These IDs should match those in labpc_cs_boards (ni_labpc.c) */
+	PCMCIA_DEVICE_MANF_CARD(0x010b, 0x0103),	/* daqcard-1200 */
+	PCMCIA_DEVICE_NULL
+};
+
+MODULE_DEVICE_TABLE(pcmcia, labpc_cs_ids);
+
+struct pcmcia_driver labpc_cs_driver = {
+	.probe = labpc_cs_attach,
+	.remove = labpc_cs_detach,
+	.suspend = labpc_cs_suspend,
+	.resume = labpc_cs_resume,
+	.id_table = labpc_cs_ids,
+	.owner = THIS_MODULE,
+	.drv = {
+			.name = dev_info,
+		},
+};
+
+static int __init init_labpc_cs(void)
+{
+	DEBUG(0, "%s\n", version);
+	pcmcia_register_driver(&labpc_cs_driver);
+	return 0;
+}
+
+static void __exit exit_labpc_cs(void)
+{
+	DEBUG(0, "ni_labpc: unloading\n");
+	pcmcia_unregister_driver(&labpc_cs_driver);
+}
+
+int __init labpc_init_module(void)
+{
+	int ret;
+
+	ret = init_labpc_cs();
+	if (ret < 0)
+		return ret;
+
+	return comedi_driver_register(&driver_labpc_cs);
+}
+
+void __exit labpc_exit_module(void)
+{
+	exit_labpc_cs();
+	comedi_driver_unregister(&driver_labpc_cs);
+}
+
+MODULE_LICENSE("GPL");
+module_init(labpc_init_module);
+module_exit(labpc_exit_module);