Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 679 insertions, 0 deletions

diff --git a/drivers/media/radio/radio-cadet.c b/drivers/media/radio/radio-cadet.c
new file mode 100644
index 000000000..a5db9b4dc
--- /dev/null
+++ b/drivers/media/radio/radio-cadet.c
@@ -0,0 +1,679 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* radio-cadet.c - A video4linux driver for the ADS Cadet AM/FM Radio Card
+ *
+ * by Fred Gleason <fredg@wava.com>
+ * Version 0.3.3
+ *
+ * (Loosely) based on code for the Aztech radio card by
+ *
+ * Russell Kroll    (rkroll@exploits.org)
+ * Quay Ly
+ * Donald Song
+ * Jason Lewis      (jlewis@twilight.vtc.vsc.edu)
+ * Scott McGrath    (smcgrath@twilight.vtc.vsc.edu)
+ * William McGrath  (wmcgrath@twilight.vtc.vsc.edu)
+ *
+ * History:
+ * 2000-04-29	Russell Kroll <rkroll@exploits.org>
+ *		Added ISAPnP detection for Linux 2.3/2.4
+ *
+ * 2001-01-10	Russell Kroll <rkroll@exploits.org>
+ *		Removed dead CONFIG_RADIO_CADET_PORT code
+ *		PnP detection on load is now default (no args necessary)
+ *
+ * 2002-01-17	Adam Belay <ambx1@neo.rr.com>
+ *		Updated to latest pnp code
+ *
+ * 2003-01-31	Alan Cox <alan@lxorguk.ukuu.org.uk>
+ *		Cleaned up locking, delay code, general odds and ends
+ *
+ * 2006-07-30	Hans J. Koch <koch@hjk-az.de>
+ *		Changed API to V4L2
+ */
+
+#include <linux/module.h>	/* Modules			*/
+#include <linux/init.h>		/* Initdata			*/
+#include <linux/ioport.h>	/* request_region		*/
+#include <linux/delay.h>	/* udelay			*/
+#include <linux/videodev2.h>	/* V4L2 API defs		*/
+#include <linux/param.h>
+#include <linux/pnp.h>
+#include <linux/sched.h>
+#include <linux/io.h>		/* outb, outb_p			*/
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-event.h>
+
+MODULE_AUTHOR("Fred Gleason, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
+MODULE_DESCRIPTION("A driver for the ADS Cadet AM/FM/RDS radio card.");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.3.4");
+
+static int io = -1;		/* default to isapnp activation */
+static int radio_nr = -1;
+
+module_param(io, int, 0);
+MODULE_PARM_DESC(io, "I/O address of Cadet card (0x330,0x332,0x334,0x336,0x338,0x33a,0x33c,0x33e)");
+module_param(radio_nr, int, 0);
+
+#define RDS_BUFFER 256
+#define RDS_RX_FLAG 1
+#define MBS_RX_FLAG 2
+
+struct cadet {
+	struct v4l2_device v4l2_dev;
+	struct video_device vdev;
+	struct v4l2_ctrl_handler ctrl_handler;
+	int io;
+	bool is_fm_band;
+	u32 curfreq;
+	int tunestat;
+	int sigstrength;
+	wait_queue_head_t read_queue;
+	struct timer_list readtimer;
+	u8 rdsin, rdsout, rdsstat;
+	unsigned char rdsbuf[RDS_BUFFER];
+	struct mutex lock;
+	int reading;
+};
+
+static struct cadet cadet_card;
+
+/*
+ * Signal Strength Threshold Values
+ * The V4L API spec does not define any particular unit for the signal
+ * strength value.  These values are in microvolts of RF at the tuner's input.
+ */
+static u16 sigtable[2][4] = {
+	{ 1835, 2621,  4128, 65535 },
+	{ 2185, 4369, 13107, 65535 },
+};
+
+static const struct v4l2_frequency_band bands[] = {
+	{
+		.index = 0,
+		.type = V4L2_TUNER_RADIO,
+		.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS,
+		.rangelow = 8320,      /* 520 kHz */
+		.rangehigh = 26400,    /* 1650 kHz */
+		.modulation = V4L2_BAND_MODULATION_AM,
+	}, {
+		.index = 1,
+		.type = V4L2_TUNER_RADIO,
+		.capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS |
+			V4L2_TUNER_CAP_RDS_BLOCK_IO | V4L2_TUNER_CAP_LOW |
+			V4L2_TUNER_CAP_FREQ_BANDS,
+		.rangelow = 1400000,   /* 87.5 MHz */
+		.rangehigh = 1728000,  /* 108.0 MHz */
+		.modulation = V4L2_BAND_MODULATION_FM,
+	},
+};
+
+
+static int cadet_getstereo(struct cadet *dev)
+{
+	int ret = V4L2_TUNER_SUB_MONO;
+
+	if (!dev->is_fm_band)	/* Only FM has stereo capability! */
+		return V4L2_TUNER_SUB_MONO;
+
+	outb(7, dev->io);          /* Select tuner control */
+	if ((inb(dev->io + 1) & 0x40) == 0)
+		ret = V4L2_TUNER_SUB_STEREO;
+	return ret;
+}
+
+static unsigned cadet_gettune(struct cadet *dev)
+{
+	int curvol, i;
+	unsigned fifo = 0;
+
+	/*
+	 * Prepare for read
+	 */
+
+	outb(7, dev->io);       /* Select tuner control */
+	curvol = inb(dev->io + 1); /* Save current volume/mute setting */
+	outb(0x00, dev->io + 1);  /* Ensure WRITE-ENABLE is LOW */
+	dev->tunestat = 0xffff;
+
+	/*
+	 * Read the shift register
+	 */
+	for (i = 0; i < 25; i++) {
+		fifo = (fifo << 1) | ((inb(dev->io + 1) >> 7) & 0x01);
+		if (i < 24) {
+			outb(0x01, dev->io + 1);
+			dev->tunestat &= inb(dev->io + 1);
+			outb(0x00, dev->io + 1);
+		}
+	}
+
+	/*
+	 * Restore volume/mute setting
+	 */
+	outb(curvol, dev->io + 1);
+	return fifo;
+}
+
+static unsigned cadet_getfreq(struct cadet *dev)
+{
+	int i;
+	unsigned freq = 0, test, fifo = 0;
+
+	/*
+	 * Read current tuning
+	 */
+	fifo = cadet_gettune(dev);
+
+	/*
+	 * Convert to actual frequency
+	 */
+	if (!dev->is_fm_band)    /* AM */
+		return ((fifo & 0x7fff) - 450) * 16;
+
+	test = 12500;
+	for (i = 0; i < 14; i++) {
+		if ((fifo & 0x01) != 0)
+			freq += test;
+		test = test << 1;
+		fifo = fifo >> 1;
+	}
+	freq -= 10700000;           /* IF frequency is 10.7 MHz */
+	freq = (freq * 16) / 1000;   /* Make it 1/16 kHz */
+	return freq;
+}
+
+static void cadet_settune(struct cadet *dev, unsigned fifo)
+{
+	int i;
+	unsigned test;
+
+	outb(7, dev->io);                /* Select tuner control */
+	/*
+	 * Write the shift register
+	 */
+	test = 0;
+	test = (fifo >> 23) & 0x02;      /* Align data for SDO */
+	test |= 0x1c;                /* SDM=1, SWE=1, SEN=1, SCK=0 */
+	outb(7, dev->io);                /* Select tuner control */
+	outb(test, dev->io + 1);           /* Initialize for write */
+	for (i = 0; i < 25; i++) {
+		test |= 0x01;              /* Toggle SCK High */
+		outb(test, dev->io + 1);
+		test &= 0xfe;              /* Toggle SCK Low */
+		outb(test, dev->io + 1);
+		fifo = fifo << 1;            /* Prepare the next bit */
+		test = 0x1c | ((fifo >> 23) & 0x02);
+		outb(test, dev->io + 1);
+	}
+}
+
+static void cadet_setfreq(struct cadet *dev, unsigned freq)
+{
+	unsigned fifo;
+	int i, j, test;
+	int curvol;
+
+	freq = clamp(freq, bands[dev->is_fm_band].rangelow,
+			   bands[dev->is_fm_band].rangehigh);
+	dev->curfreq = freq;
+	/*
+	 * Formulate a fifo command
+	 */
+	fifo = 0;
+	if (dev->is_fm_band) {    /* FM */
+		test = 102400;
+		freq = freq / 16;       /* Make it kHz */
+		freq += 10700;               /* IF is 10700 kHz */
+		for (i = 0; i < 14; i++) {
+			fifo = fifo << 1;
+			if (freq >= test) {
+				fifo |= 0x01;
+				freq -= test;
+			}
+			test = test >> 1;
+		}
+	} else {	/* AM */
+		fifo = (freq / 16) + 450;	/* Make it kHz */
+		fifo |= 0x100000;		/* Select AM Band */
+	}
+
+	/*
+	 * Save current volume/mute setting
+	 */
+
+	outb(7, dev->io);                /* Select tuner control */
+	curvol = inb(dev->io + 1);
+
+	/*
+	 * Tune the card
+	 */
+	for (j = 3; j > -1; j--) {
+		cadet_settune(dev, fifo | (j << 16));
+
+		outb(7, dev->io);         /* Select tuner control */
+		outb(curvol, dev->io + 1);
+
+		msleep(100);
+
+		cadet_gettune(dev);
+		if ((dev->tunestat & 0x40) == 0) {   /* Tuned */
+			dev->sigstrength = sigtable[dev->is_fm_band][j];
+			goto reset_rds;
+		}
+	}
+	dev->sigstrength = 0;
+reset_rds:
+	outb(3, dev->io);
+	outb(inb(dev->io + 1) & 0x7f, dev->io + 1);
+}
+
+static bool cadet_has_rds_data(struct cadet *dev)
+{
+	bool result;
+
+	mutex_lock(&dev->lock);
+	result = dev->rdsin != dev->rdsout;
+	mutex_unlock(&dev->lock);
+	return result;
+}
+
+
+static void cadet_handler(struct timer_list *t)
+{
+	struct cadet *dev = from_timer(dev, t, readtimer);
+
+	/* Service the RDS fifo */
+	if (mutex_trylock(&dev->lock)) {
+		outb(0x3, dev->io);       /* Select RDS Decoder Control */
+		if ((inb(dev->io + 1) & 0x20) != 0)
+			pr_err("cadet: RDS fifo overflow\n");
+		outb(0x80, dev->io);      /* Select RDS fifo */
+
+		while ((inb(dev->io) & 0x80) != 0) {
+			dev->rdsbuf[dev->rdsin] = inb(dev->io + 1);
+			if (dev->rdsin + 1 != dev->rdsout)
+				dev->rdsin++;
+		}
+		mutex_unlock(&dev->lock);
+	}
+
+	/*
+	 * Service pending read
+	 */
+	if (cadet_has_rds_data(dev))
+		wake_up_interruptible(&dev->read_queue);
+
+	/*
+	 * Clean up and exit
+	 */
+	dev->readtimer.expires = jiffies + msecs_to_jiffies(50);
+	add_timer(&dev->readtimer);
+}
+
+static void cadet_start_rds(struct cadet *dev)
+{
+	dev->rdsstat = 1;
+	outb(0x80, dev->io);        /* Select RDS fifo */
+	timer_setup(&dev->readtimer, cadet_handler, 0);
+	dev->readtimer.expires = jiffies + msecs_to_jiffies(50);
+	add_timer(&dev->readtimer);
+}
+
+static ssize_t cadet_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
+{
+	struct cadet *dev = video_drvdata(file);
+	unsigned char readbuf[RDS_BUFFER];
+	int i = 0;
+
+	mutex_lock(&dev->lock);
+	if (dev->rdsstat == 0)
+		cadet_start_rds(dev);
+	mutex_unlock(&dev->lock);
+
+	if (!cadet_has_rds_data(dev) && (file->f_flags & O_NONBLOCK))
+		return -EWOULDBLOCK;
+	i = wait_event_interruptible(dev->read_queue, cadet_has_rds_data(dev));
+	if (i)
+		return i;
+
+	mutex_lock(&dev->lock);
+	while (i < count && dev->rdsin != dev->rdsout)
+		readbuf[i++] = dev->rdsbuf[dev->rdsout++];
+	mutex_unlock(&dev->lock);
+
+	if (i && copy_to_user(data, readbuf, i))
+		return -EFAULT;
+	return i;
+}
+
+
+static int vidioc_querycap(struct file *file, void *priv,
+				struct v4l2_capability *v)
+{
+	strscpy(v->driver, "ADS Cadet", sizeof(v->driver));
+	strscpy(v->card, "ADS Cadet", sizeof(v->card));
+	strscpy(v->bus_info, "ISA:radio-cadet", sizeof(v->bus_info));
+	return 0;
+}
+
+static int vidioc_g_tuner(struct file *file, void *priv,
+				struct v4l2_tuner *v)
+{
+	struct cadet *dev = video_drvdata(file);
+
+	if (v->index)
+		return -EINVAL;
+	v->type = V4L2_TUNER_RADIO;
+	strscpy(v->name, "Radio", sizeof(v->name));
+	v->capability = bands[0].capability | bands[1].capability;
+	v->rangelow = bands[0].rangelow;	   /* 520 kHz (start of AM band) */
+	v->rangehigh = bands[1].rangehigh;    /* 108.0 MHz (end of FM band) */
+	if (dev->is_fm_band) {
+		v->rxsubchans = cadet_getstereo(dev);
+		outb(3, dev->io);
+		outb(inb(dev->io + 1) & 0x7f, dev->io + 1);
+		mdelay(100);
+		outb(3, dev->io);
+		if (inb(dev->io + 1) & 0x80)
+			v->rxsubchans |= V4L2_TUNER_SUB_RDS;
+	} else {
+		v->rangelow = 8320;      /* 520 kHz */
+		v->rangehigh = 26400;    /* 1650 kHz */
+		v->rxsubchans = V4L2_TUNER_SUB_MONO;
+	}
+	v->audmode = V4L2_TUNER_MODE_STEREO;
+	v->signal = dev->sigstrength; /* We might need to modify scaling of this */
+	return 0;
+}
+
+static int vidioc_s_tuner(struct file *file, void *priv,
+				const struct v4l2_tuner *v)
+{
+	return v->index ? -EINVAL : 0;
+}
+
+static int vidioc_enum_freq_bands(struct file *file, void *priv,
+				struct v4l2_frequency_band *band)
+{
+	if (band->tuner)
+		return -EINVAL;
+	if (band->index >= ARRAY_SIZE(bands))
+		return -EINVAL;
+	*band = bands[band->index];
+	return 0;
+}
+
+static int vidioc_g_frequency(struct file *file, void *priv,
+				struct v4l2_frequency *f)
+{
+	struct cadet *dev = video_drvdata(file);
+
+	if (f->tuner)
+		return -EINVAL;
+	f->type = V4L2_TUNER_RADIO;
+	f->frequency = dev->curfreq;
+	return 0;
+}
+
+
+static int vidioc_s_frequency(struct file *file, void *priv,
+				const struct v4l2_frequency *f)
+{
+	struct cadet *dev = video_drvdata(file);
+
+	if (f->tuner)
+		return -EINVAL;
+	dev->is_fm_band =
+		f->frequency >= (bands[0].rangehigh + bands[1].rangelow) / 2;
+	cadet_setfreq(dev, f->frequency);
+	return 0;
+}
+
+static int cadet_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct cadet *dev = container_of(ctrl->handler, struct cadet, ctrl_handler);
+
+	switch (ctrl->id) {
+	case V4L2_CID_AUDIO_MUTE:
+		outb(7, dev->io);                /* Select tuner control */
+		if (ctrl->val)
+			outb(0x00, dev->io + 1);
+		else
+			outb(0x20, dev->io + 1);
+		return 0;
+	}
+	return -EINVAL;
+}
+
+static int cadet_open(struct file *file)
+{
+	struct cadet *dev = video_drvdata(file);
+	int err;
+
+	mutex_lock(&dev->lock);
+	err = v4l2_fh_open(file);
+	if (err)
+		goto fail;
+	if (v4l2_fh_is_singular_file(file))
+		init_waitqueue_head(&dev->read_queue);
+fail:
+	mutex_unlock(&dev->lock);
+	return err;
+}
+
+static int cadet_release(struct file *file)
+{
+	struct cadet *dev = video_drvdata(file);
+
+	mutex_lock(&dev->lock);
+	if (v4l2_fh_is_singular_file(file) && dev->rdsstat) {
+		del_timer_sync(&dev->readtimer);
+		dev->rdsstat = 0;
+	}
+	v4l2_fh_release(file);
+	mutex_unlock(&dev->lock);
+	return 0;
+}
+
+static __poll_t cadet_poll(struct file *file, struct poll_table_struct *wait)
+{
+	struct cadet *dev = video_drvdata(file);
+	__poll_t req_events = poll_requested_events(wait);
+	__poll_t res = v4l2_ctrl_poll(file, wait);
+
+	poll_wait(file, &dev->read_queue, wait);
+	if (dev->rdsstat == 0 && (req_events & (EPOLLIN | EPOLLRDNORM))) {
+		mutex_lock(&dev->lock);
+		if (dev->rdsstat == 0)
+			cadet_start_rds(dev);
+		mutex_unlock(&dev->lock);
+	}
+	if (cadet_has_rds_data(dev))
+		res |= EPOLLIN | EPOLLRDNORM;
+	return res;
+}
+
+
+static const struct v4l2_file_operations cadet_fops = {
+	.owner		= THIS_MODULE,
+	.open		= cadet_open,
+	.release	= cadet_release,
+	.read		= cadet_read,
+	.unlocked_ioctl	= video_ioctl2,
+	.poll		= cadet_poll,
+};
+
+static const struct v4l2_ioctl_ops cadet_ioctl_ops = {
+	.vidioc_querycap    = vidioc_querycap,
+	.vidioc_g_tuner     = vidioc_g_tuner,
+	.vidioc_s_tuner     = vidioc_s_tuner,
+	.vidioc_g_frequency = vidioc_g_frequency,
+	.vidioc_s_frequency = vidioc_s_frequency,
+	.vidioc_enum_freq_bands = vidioc_enum_freq_bands,
+	.vidioc_log_status  = v4l2_ctrl_log_status,
+	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static const struct v4l2_ctrl_ops cadet_ctrl_ops = {
+	.s_ctrl = cadet_s_ctrl,
+};
+
+#ifdef CONFIG_PNP
+
+static const struct pnp_device_id cadet_pnp_devices[] = {
+	/* ADS Cadet AM/FM Radio Card */
+	{.id = "MSM0c24", .driver_data = 0},
+	{.id = ""}
+};
+
+MODULE_DEVICE_TABLE(pnp, cadet_pnp_devices);
+
+static int cadet_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
+{
+	if (!dev)
+		return -ENODEV;
+	/* only support one device */
+	if (io > 0)
+		return -EBUSY;
+
+	if (!pnp_port_valid(dev, 0))
+		return -ENODEV;
+
+	io = pnp_port_start(dev, 0);
+
+	printk(KERN_INFO "radio-cadet: PnP reports device at %#x\n", io);
+
+	return io;
+}
+
+static struct pnp_driver cadet_pnp_driver = {
+	.name		= "radio-cadet",
+	.id_table	= cadet_pnp_devices,
+	.probe		= cadet_pnp_probe,
+	.remove		= NULL,
+};
+
+#else
+static struct pnp_driver cadet_pnp_driver;
+#endif
+
+static void cadet_probe(struct cadet *dev)
+{
+	static int iovals[8] = { 0x330, 0x332, 0x334, 0x336, 0x338, 0x33a, 0x33c, 0x33e };
+	int i;
+
+	for (i = 0; i < 8; i++) {
+		dev->io = iovals[i];
+		if (request_region(dev->io, 2, "cadet-probe")) {
+			cadet_setfreq(dev, bands[1].rangelow);
+			if (cadet_getfreq(dev) == bands[1].rangelow) {
+				release_region(dev->io, 2);
+				return;
+			}
+			release_region(dev->io, 2);
+		}
+	}
+	dev->io = -1;
+}
+
+/*
+ * io should only be set if the user has used something like
+ * isapnp (the userspace program) to initialize this card for us
+ */
+
+static int __init cadet_init(void)
+{
+	struct cadet *dev = &cadet_card;
+	struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
+	struct v4l2_ctrl_handler *hdl;
+	int res = -ENODEV;
+
+	strscpy(v4l2_dev->name, "cadet", sizeof(v4l2_dev->name));
+	mutex_init(&dev->lock);
+
+	/* If a probe was requested then probe ISAPnP first (safest) */
+	if (io < 0)
+		pnp_register_driver(&cadet_pnp_driver);
+	dev->io = io;
+
+	/* If that fails then probe unsafely if probe is requested */
+	if (dev->io < 0)
+		cadet_probe(dev);
+
+	/* Else we bail out */
+	if (dev->io < 0) {
+#ifdef MODULE
+		v4l2_err(v4l2_dev, "you must set an I/O address with io=0x330, 0x332, 0x334,\n");
+		v4l2_err(v4l2_dev, "0x336, 0x338, 0x33a, 0x33c or 0x33e\n");
+#endif
+		goto fail;
+	}
+	if (!request_region(dev->io, 2, "cadet"))
+		goto fail;
+
+	res = v4l2_device_register(NULL, v4l2_dev);
+	if (res < 0) {
+		release_region(dev->io, 2);
+		v4l2_err(v4l2_dev, "could not register v4l2_device\n");
+		goto fail;
+	}
+
+	hdl = &dev->ctrl_handler;
+	v4l2_ctrl_handler_init(hdl, 2);
+	v4l2_ctrl_new_std(hdl, &cadet_ctrl_ops,
+			V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
+	v4l2_dev->ctrl_handler = hdl;
+	if (hdl->error) {
+		res = hdl->error;
+		v4l2_err(v4l2_dev, "Could not register controls\n");
+		goto err_hdl;
+	}
+
+	dev->is_fm_band = true;
+	dev->curfreq = bands[dev->is_fm_band].rangelow;
+	cadet_setfreq(dev, dev->curfreq);
+	strscpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
+	dev->vdev.v4l2_dev = v4l2_dev;
+	dev->vdev.fops = &cadet_fops;
+	dev->vdev.ioctl_ops = &cadet_ioctl_ops;
+	dev->vdev.release = video_device_release_empty;
+	dev->vdev.lock = &dev->lock;
+	dev->vdev.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO |
+				V4L2_CAP_READWRITE | V4L2_CAP_RDS_CAPTURE;
+	video_set_drvdata(&dev->vdev, dev);
+
+	res = video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr);
+	if (res < 0)
+		goto err_hdl;
+	v4l2_info(v4l2_dev, "ADS Cadet Radio Card at 0x%x\n", dev->io);
+	return 0;
+err_hdl:
+	v4l2_ctrl_handler_free(hdl);
+	v4l2_device_unregister(v4l2_dev);
+	release_region(dev->io, 2);
+fail:
+	pnp_unregister_driver(&cadet_pnp_driver);
+	return res;
+}
+
+static void __exit cadet_exit(void)
+{
+	struct cadet *dev = &cadet_card;
+
+	video_unregister_device(&dev->vdev);
+	v4l2_ctrl_handler_free(&dev->ctrl_handler);
+	v4l2_device_unregister(&dev->v4l2_dev);
+	outb(7, dev->io);	/* Mute */
+	outb(0x00, dev->io + 1);
+	release_region(dev->io, 2);
+	pnp_unregister_driver(&cadet_pnp_driver);
+}
+
+module_init(cadet_init);
+module_exit(cadet_exit);
+