drivers/media/radio/radio-maxiradio.c - kernel/msm-4.19 - Gitiles

 /*
  * Guillemot Maxi Radio FM 2000 PCI radio card driver for Linux
  * (C) 2001 Dimitromanolakis Apostolos <apdim@grecian.net>
  *
  * Based in the radio Maestro PCI driver. Actually it uses the same chip
  * for radio but different pci controller.
  *
  * I didn't have any specs I reversed engineered the protocol from
  * the windows driver (radio.dll).
  *
  * The card uses the TEA5757 chip that includes a search function but it
  * is useless as I haven't found any way to read back the frequency. If
  * anybody does please mail me.
  *
  * For the pdf file see:
  * http://www.semiconductors.philips.com/pip/TEA5757H/V1
  *
  *
  * CHANGES:
  *   0.75b
  *     - better pci interface thanks to Francois Romieu <romieu@cogenit.fr>
  *
  *   0.75      Sun Feb  4 22:51:27 EET 2001
  *     - tiding up
  *     - removed support for multiple devices as it didn't work anyway
  *
  * BUGS:
  *   - card unmutes if you change frequency
  *
  * (c) 2006, 2007 by Mauro Carvalho Chehab <mchehab@infradead.org>:
  *	- Conversion to V4L2 API
  *      - Uses video_ioctl2 for parsing and to add debug support
  */


 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/ioport.h>
 #include <linux/delay.h>
 #include <linux/mutex.h>
 #include <linux/pci.h>
 #include <linux/videodev2.h>
 #include <linux/version.h>      /* for KERNEL_VERSION MACRO     */
 #include <linux/io.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-ioctl.h>

 MODULE_AUTHOR("Dimitromanolakis Apostolos, apdim@grecian.net");
 MODULE_DESCRIPTION("Radio driver for the Guillemot Maxi Radio FM2000 radio.");
 MODULE_LICENSE("GPL");

 static int radio_nr = -1;
 module_param(radio_nr, int, 0);

 static int debug;

 module_param(debug, int, 0644);
 MODULE_PARM_DESC(debug, "activates debug info");

 #define DRIVER_VERSION	"0.77"

 #define RADIO_VERSION KERNEL_VERSION(0, 7, 7)

 #define dprintk(dev, num, fmt, arg...) \
 	v4l2_dbg(num, debug, &dev->v4l2_dev, fmt, ## arg)

 #ifndef PCI_VENDOR_ID_GUILLEMOT
 #define PCI_VENDOR_ID_GUILLEMOT 0x5046
 #endif

 #ifndef PCI_DEVICE_ID_GUILLEMOT
 #define PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO 0x1001
 #endif


 /* TEA5757 pin mappings */
 static const int clk = 1, data = 2, wren = 4, mo_st = 8, power = 16;

 #define FREQ_LO		(50 * 16000)
 #define FREQ_HI		(150 * 16000)

 #define FREQ_IF         171200 /* 10.7*16000   */
 #define FREQ_STEP       200    /* 12.5*16      */

 /* (x==fmhz*16*1000) -> bits */
 #define FREQ2BITS(x) \
   ((((unsigned int)(x) + FREQ_IF + (FREQ_STEP << 1)) / (FREQ_STEP << 2)) << 2)

 #define BITS2FREQ(x)	((x) * FREQ_STEP - FREQ_IF)


 struct maxiradio
 {
 	struct v4l2_device v4l2_dev;
 	struct video_device vdev;
 	struct pci_dev *pdev;

 	u16	io;	/* base of radio io */
 	u16	muted;	/* VIDEO_AUDIO_MUTE */
 	u16	stereo;	/* VIDEO_TUNER_STEREO_ON */
 	u16	tuned;	/* signal strength (0 or 0xffff) */

 	unsigned long freq;

 	struct mutex lock;
 };

 static inline struct maxiradio *to_maxiradio(struct v4l2_device *v4l2_dev)
 {
 	return container_of(v4l2_dev, struct maxiradio, v4l2_dev);
 }

 static void outbit(unsigned long bit, u16 io)
 {
 	int val = power | wren | (bit ? data : 0);

 	outb(val, io);
 	udelay(4);
 	outb(val | clk, io);
 	udelay(4);
 	outb(val, io);
 	udelay(4);
 }

 static void turn_power(struct maxiradio *dev, int p)
 {
 	if (p != 0) {
 		dprintk(dev, 1, "Radio powered on\n");
 		outb(power, dev->io);
 	} else {
 		dprintk(dev, 1, "Radio powered off\n");
 		outb(0, dev->io);
 	}
 }

 static void set_freq(struct maxiradio *dev, u32 freq)
 {
 	unsigned long int si;
 	int bl;
 	int io = dev->io;
 	int val = FREQ2BITS(freq);

 	/* TEA5757 shift register bits (see pdf) */

 	outbit(0, io); /* 24  search */
 	outbit(1, io); /* 23  search up/down */

 	outbit(0, io); /* 22  stereo/mono */

 	outbit(0, io); /* 21  band */
 	outbit(0, io); /* 20  band (only 00=FM works I think) */

 	outbit(0, io); /* 19  port ? */
 	outbit(0, io); /* 18  port ? */

 	outbit(0, io); /* 17  search level */
 	outbit(0, io); /* 16  search level */

 	si = 0x8000;
 	for (bl = 1; bl <= 16; bl++) {
 		outbit(val & si, io);
 		si >>= 1;
 	}

 	dprintk(dev, 1, "Radio freq set to %d.%02d MHz\n",
 				freq / 16000,
 				freq % 16000 * 100 / 16000);

 	turn_power(dev, 1);
 }

 static int get_stereo(u16 io)
 {
 	outb(power,io);
 	udelay(4);

 	return !(inb(io) & mo_st);
 }

 static int get_tune(u16 io)
 {
 	outb(power+clk,io);
 	udelay(4);

 	return !(inb(io) & mo_st);
 }


 static int vidioc_querycap(struct file *file, void  *priv,
 			    struct v4l2_capability *v)
 {
 	struct maxiradio *dev = video_drvdata(file);

 	strlcpy(v->driver, "radio-maxiradio", sizeof(v->driver));
 	strlcpy(v->card, "Maxi Radio FM2000 radio", sizeof(v->card));
 	snprintf(v->bus_info, sizeof(v->bus_info), "PCI:%s", pci_name(dev->pdev));
 	v->version = RADIO_VERSION;
 	v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
 	return 0;
 }

 static int vidioc_g_tuner(struct file *file, void *priv,
 			   struct v4l2_tuner *v)
 {
 	struct maxiradio *dev = video_drvdata(file);

 	if (v->index > 0)
 		return -EINVAL;

 	mutex_lock(&dev->lock);
 	strlcpy(v->name, "FM", sizeof(v->name));
 	v->type = V4L2_TUNER_RADIO;
 	v->rangelow = FREQ_LO;
 	v->rangehigh = FREQ_HI;
 	v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
 	v->capability = V4L2_TUNER_CAP_LOW;
 	if (get_stereo(dev->io))
 		v->audmode = V4L2_TUNER_MODE_STEREO;
 	else
 		v->audmode = V4L2_TUNER_MODE_MONO;
 	v->signal = 0xffff * get_tune(dev->io);
 	mutex_unlock(&dev->lock);

 	return 0;
 }

 static int vidioc_s_tuner(struct file *file, void *priv,
 			   struct v4l2_tuner *v)
 {
 	return v->index ? -EINVAL : 0;
 }

 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
 {
 	*i = 0;
 	return 0;
 }

 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 {
 	return i ? -EINVAL : 0;
 }

 static int vidioc_g_audio(struct file *file, void *priv,
 			   struct v4l2_audio *a)
 {
 	a->index = 0;
 	strlcpy(a->name, "Radio", sizeof(a->name));
 	a->capability = V4L2_AUDCAP_STEREO;
 	return 0;
 }


 static int vidioc_s_audio(struct file *file, void *priv,
 			   struct v4l2_audio *a)
 {
 	return a->index ? -EINVAL : 0;
 }

 static int vidioc_s_frequency(struct file *file, void *priv,
 			       struct v4l2_frequency *f)
 {
 	struct maxiradio *dev = video_drvdata(file);

 	if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
 		return -EINVAL;
 	if (f->frequency < FREQ_LO || f->frequency > FREQ_HI) {
 		dprintk(dev, 1, "radio freq (%d.%02d MHz) out of range (%d-%d)\n",
 					f->frequency / 16000,
 					f->frequency % 16000 * 100 / 16000,
 					FREQ_LO / 16000, FREQ_HI / 16000);

 		return -EINVAL;
 	}

 	mutex_lock(&dev->lock);
 	dev->freq = f->frequency;
 	set_freq(dev, dev->freq);
 	msleep(125);
 	mutex_unlock(&dev->lock);

 	return 0;
 }

 static int vidioc_g_frequency(struct file *file, void *priv,
 			       struct v4l2_frequency *f)
 {
 	struct maxiradio *dev = video_drvdata(file);

 	if (f->tuner != 0)
 		return -EINVAL;
 	f->type = V4L2_TUNER_RADIO;
 	f->frequency = dev->freq;

 	dprintk(dev, 4, "radio freq is %d.%02d MHz",
 				f->frequency / 16000,
 				f->frequency % 16000 * 100 / 16000);

 	return 0;
 }

 static int vidioc_queryctrl(struct file *file, void *priv,
 			     struct v4l2_queryctrl *qc)
 {
 	switch (qc->id) {
 	case V4L2_CID_AUDIO_MUTE:
 		return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
 	}
 	return -EINVAL;
 }

 static int vidioc_g_ctrl(struct file *file, void *priv,
 		struct v4l2_control *ctrl)
 {
 	struct maxiradio *dev = video_drvdata(file);

 	switch (ctrl->id) {
 	case V4L2_CID_AUDIO_MUTE:
 		ctrl->value = dev->muted;
 		return 0;
 	}

 	return -EINVAL;
 }

 static int vidioc_s_ctrl(struct file *file, void *priv,
 		struct v4l2_control *ctrl)
 {
 	struct maxiradio *dev = video_drvdata(file);

 	switch (ctrl->id) {
 	case V4L2_CID_AUDIO_MUTE:
 		mutex_lock(&dev->lock);
 		dev->muted = ctrl->value;
 		if (dev->muted)
 			turn_power(dev, 0);
 		else
 			set_freq(dev, dev->freq);
 		mutex_unlock(&dev->lock);
 		return 0;
 	}

 	return -EINVAL;
 }

 static const struct v4l2_file_operations maxiradio_fops = {
 	.owner		= THIS_MODULE,
 	.ioctl          = video_ioctl2,
 };

 static const struct v4l2_ioctl_ops maxiradio_ioctl_ops = {
 	.vidioc_querycap    = vidioc_querycap,
 	.vidioc_g_tuner     = vidioc_g_tuner,
 	.vidioc_s_tuner     = vidioc_s_tuner,
 	.vidioc_g_audio     = vidioc_g_audio,
 	.vidioc_s_audio     = vidioc_s_audio,
 	.vidioc_g_input     = vidioc_g_input,
 	.vidioc_s_input     = vidioc_s_input,
 	.vidioc_g_frequency = vidioc_g_frequency,
 	.vidioc_s_frequency = vidioc_s_frequency,
 	.vidioc_queryctrl   = vidioc_queryctrl,
 	.vidioc_g_ctrl      = vidioc_g_ctrl,
 	.vidioc_s_ctrl      = vidioc_s_ctrl,
 };

 static int __devinit maxiradio_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
 	struct maxiradio *dev;
 	struct v4l2_device *v4l2_dev;
 	int retval = -ENOMEM;

 	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 	if (dev == NULL) {
 		dev_err(&pdev->dev, "not enough memory\n");
 		return -ENOMEM;
 	}

 	v4l2_dev = &dev->v4l2_dev;
 	mutex_init(&dev->lock);
 	dev->pdev = pdev;
 	dev->muted = 1;
 	dev->freq = FREQ_LO;

 	strlcpy(v4l2_dev->name, "maxiradio", sizeof(v4l2_dev->name));

 	retval = v4l2_device_register(&pdev->dev, v4l2_dev);
 	if (retval < 0) {
 		v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
 		goto errfr;
 	}

 	if (!request_region(pci_resource_start(pdev, 0),
 			   pci_resource_len(pdev, 0), "Maxi Radio FM 2000")) {
 		v4l2_err(v4l2_dev, "can't reserve I/O ports\n");
 		goto err_out;
 	}

 	if (pci_enable_device(pdev))
 		goto err_out_free_region;

 	dev->io = pci_resource_start(pdev, 0);
 	strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
 	dev->vdev.v4l2_dev = v4l2_dev;
 	dev->vdev.fops = &maxiradio_fops;
 	dev->vdev.ioctl_ops = &maxiradio_ioctl_ops;
 	dev->vdev.release = video_device_release_empty;
 	video_set_drvdata(&dev->vdev, dev);

 	if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
 		v4l2_err(v4l2_dev, "can't register device!");
 		goto err_out_free_region;
 	}

 	v4l2_info(v4l2_dev, "version " DRIVER_VERSION
 			" time " __TIME__ "  " __DATE__ "\n");

 	v4l2_info(v4l2_dev, "found Guillemot MAXI Radio device (io = 0x%x)\n",
 	       dev->io);
 	return 0;

 err_out_free_region:
 	release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
 err_out:
 	v4l2_device_unregister(v4l2_dev);
 errfr:
 	kfree(dev);
 	return -ENODEV;
 }

 static void __devexit maxiradio_remove_one(struct pci_dev *pdev)
 {
 	struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
 	struct maxiradio *dev = to_maxiradio(v4l2_dev);

 	video_unregister_device(&dev->vdev);
 	v4l2_device_unregister(&dev->v4l2_dev);
 	release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
 }

 static struct pci_device_id maxiradio_pci_tbl[] = {
 	{ PCI_VENDOR_ID_GUILLEMOT, PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO,
 		PCI_ANY_ID, PCI_ANY_ID, },
 	{ 0 }
 };

 MODULE_DEVICE_TABLE(pci, maxiradio_pci_tbl);

 static struct pci_driver maxiradio_driver = {
 	.name		= "radio-maxiradio",
 	.id_table	= maxiradio_pci_tbl,
 	.probe		= maxiradio_init_one,
 	.remove		= __devexit_p(maxiradio_remove_one),
 };

 static int __init maxiradio_radio_init(void)
 {
 	return pci_register_driver(&maxiradio_driver);
 }

 static void __exit maxiradio_radio_exit(void)
 {
 	pci_unregister_driver(&maxiradio_driver);
 }

 module_init(maxiradio_radio_init);
 module_exit(maxiradio_radio_exit);
	/*
	* Guillemot Maxi Radio FM 2000 PCI radio card driver for Linux
	* (C) 2001 Dimitromanolakis Apostolos <apdim@grecian.net>
	*
	* Based in the radio Maestro PCI driver. Actually it uses the same chip
	* for radio but different pci controller.
	*
	* I didn't have any specs I reversed engineered the protocol from
	* the windows driver (radio.dll).
	*
	* The card uses the TEA5757 chip that includes a search function but it
	* is useless as I haven't found any way to read back the frequency. If
	* anybody does please mail me.
	*
	* For the pdf file see:
	* http://www.semiconductors.philips.com/pip/TEA5757H/V1
	*
	*
	* CHANGES:
	* 0.75b
	* - better pci interface thanks to Francois Romieu <romieu@cogenit.fr>
	*
	* 0.75 Sun Feb 4 22:51:27 EET 2001
	* - tiding up
	* - removed support for multiple devices as it didn't work anyway
	*
	* BUGS:
	* - card unmutes if you change frequency
	*
	* (c) 2006, 2007 by Mauro Carvalho Chehab <mchehab@infradead.org>:
	* - Conversion to V4L2 API
	* - Uses video_ioctl2 for parsing and to add debug support
	*/


	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/ioport.h>
	#include <linux/delay.h>
	#include <linux/mutex.h>
	#include <linux/pci.h>
	#include <linux/videodev2.h>
	#include <linux/version.h> /* for KERNEL_VERSION MACRO */
	#include <linux/io.h>
	#include <media/v4l2-device.h>
	#include <media/v4l2-ioctl.h>

	MODULE_AUTHOR("Dimitromanolakis Apostolos, apdim@grecian.net");
	MODULE_DESCRIPTION("Radio driver for the Guillemot Maxi Radio FM2000 radio.");
	MODULE_LICENSE("GPL");

	static int radio_nr = -1;
	module_param(radio_nr, int, 0);

	static int debug;

	module_param(debug, int, 0644);
	MODULE_PARM_DESC(debug, "activates debug info");

	#define DRIVER_VERSION "0.77"

	#define RADIO_VERSION KERNEL_VERSION(0, 7, 7)

	#define dprintk(dev, num, fmt, arg...) \
	v4l2_dbg(num, debug, &dev->v4l2_dev, fmt, ## arg)

	#ifndef PCI_VENDOR_ID_GUILLEMOT
	#define PCI_VENDOR_ID_GUILLEMOT 0x5046
	#endif

	#ifndef PCI_DEVICE_ID_GUILLEMOT
	#define PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO 0x1001
	#endif


	/* TEA5757 pin mappings */
	static const int clk = 1, data = 2, wren = 4, mo_st = 8, power = 16;

	#define FREQ_LO (50 * 16000)
	#define FREQ_HI (150 * 16000)

	#define FREQ_IF 171200 /* 10.716000 /
	#define FREQ_STEP 200 /* 12.516 /

	/* (x==fmhz161000) -> bits */
	#define FREQ2BITS(x) \
	((((unsigned int)(x) + FREQ_IF + (FREQ_STEP << 1)) / (FREQ_STEP << 2)) << 2)

	#define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)


	struct maxiradio
	{
	struct v4l2_device v4l2_dev;
	struct video_device vdev;
	struct pci_dev *pdev;

	u16 io; /* base of radio io */
	u16 muted; /* VIDEO_AUDIO_MUTE */
	u16 stereo; /* VIDEO_TUNER_STEREO_ON */
	u16 tuned; /* signal strength (0 or 0xffff) */

	unsigned long freq;

	struct mutex lock;
	};

	static inline struct maxiradio to_maxiradio(struct v4l2_device v4l2_dev)
	{
	return container_of(v4l2_dev, struct maxiradio, v4l2_dev);
	}

	static void outbit(unsigned long bit, u16 io)
	{
	int val = power \| wren \| (bit ? data : 0);

	outb(val, io);
	udelay(4);
	outb(val \| clk, io);
	udelay(4);
	outb(val, io);
	udelay(4);
	}

	static void turn_power(struct maxiradio *dev, int p)
	{
	if (p != 0) {
	dprintk(dev, 1, "Radio powered on\n");
	outb(power, dev->io);
	} else {
	dprintk(dev, 1, "Radio powered off\n");
	outb(0, dev->io);
	}
	}

	static void set_freq(struct maxiradio *dev, u32 freq)
	{
	unsigned long int si;
	int bl;
	int io = dev->io;
	int val = FREQ2BITS(freq);

	/* TEA5757 shift register bits (see pdf) */

	outbit(0, io); /* 24 search */
	outbit(1, io); /* 23 search up/down */

	outbit(0, io); /* 22 stereo/mono */

	outbit(0, io); /* 21 band */
	outbit(0, io); /* 20 band (only 00=FM works I think) */

	outbit(0, io); /* 19 port ? */
	outbit(0, io); /* 18 port ? */

	outbit(0, io); /* 17 search level */
	outbit(0, io); /* 16 search level */

	si = 0x8000;
	for (bl = 1; bl <= 16; bl++) {
	outbit(val & si, io);
	si >>= 1;
	}

	dprintk(dev, 1, "Radio freq set to %d.%02d MHz\n",
	freq / 16000,
	freq % 16000 * 100 / 16000);

	turn_power(dev, 1);
	}

	static int get_stereo(u16 io)
	{
	outb(power,io);
	udelay(4);

	return !(inb(io) & mo_st);
	}

	static int get_tune(u16 io)
	{
	outb(power+clk,io);
	udelay(4);

	return !(inb(io) & mo_st);
	}


	static int vidioc_querycap(struct file file, void priv,
	struct v4l2_capability *v)
	{
	struct maxiradio *dev = video_drvdata(file);

	strlcpy(v->driver, "radio-maxiradio", sizeof(v->driver));
	strlcpy(v->card, "Maxi Radio FM2000 radio", sizeof(v->card));
	snprintf(v->bus_info, sizeof(v->bus_info), "PCI:%s", pci_name(dev->pdev));
	v->version = RADIO_VERSION;
	v->capabilities = V4L2_CAP_TUNER \| V4L2_CAP_RADIO;
	return 0;
	}

	static int vidioc_g_tuner(struct file file, void priv,
	struct v4l2_tuner *v)
	{
	struct maxiradio *dev = video_drvdata(file);

	if (v->index > 0)
	return -EINVAL;

	mutex_lock(&dev->lock);
	strlcpy(v->name, "FM", sizeof(v->name));
	v->type = V4L2_TUNER_RADIO;
	v->rangelow = FREQ_LO;
	v->rangehigh = FREQ_HI;
	v->rxsubchans = V4L2_TUNER_SUB_MONO \| V4L2_TUNER_SUB_STEREO;
	v->capability = V4L2_TUNER_CAP_LOW;
	if (get_stereo(dev->io))
	v->audmode = V4L2_TUNER_MODE_STEREO;
	else
	v->audmode = V4L2_TUNER_MODE_MONO;
	v->signal = 0xffff * get_tune(dev->io);
	mutex_unlock(&dev->lock);

	return 0;
	}

	static int vidioc_s_tuner(struct file file, void priv,
	struct v4l2_tuner *v)
	{
	return v->index ? -EINVAL : 0;
	}

	static int vidioc_g_input(struct file filp, void priv, unsigned int *i)
	{
	*i = 0;
	return 0;
	}

	static int vidioc_s_input(struct file filp, void priv, unsigned int i)
	{
	return i ? -EINVAL : 0;
	}

	static int vidioc_g_audio(struct file file, void priv,
	struct v4l2_audio *a)
	{
	a->index = 0;
	strlcpy(a->name, "Radio", sizeof(a->name));
	a->capability = V4L2_AUDCAP_STEREO;
	return 0;
	}


	static int vidioc_s_audio(struct file file, void priv,
	struct v4l2_audio *a)
	{
	return a->index ? -EINVAL : 0;
	}

	static int vidioc_s_frequency(struct file file, void priv,
	struct v4l2_frequency *f)
	{
	struct maxiradio *dev = video_drvdata(file);

	if (f->tuner != 0 \|\| f->type != V4L2_TUNER_RADIO)
	return -EINVAL;
	if (f->frequency < FREQ_LO \|\| f->frequency > FREQ_HI) {
	dprintk(dev, 1, "radio freq (%d.%02d MHz) out of range (%d-%d)\n",
	f->frequency / 16000,
	f->frequency % 16000 * 100 / 16000,
	FREQ_LO / 16000, FREQ_HI / 16000);

	return -EINVAL;
	}

	mutex_lock(&dev->lock);
	dev->freq = f->frequency;
	set_freq(dev, dev->freq);
	msleep(125);
	mutex_unlock(&dev->lock);

	return 0;
	}

	static int vidioc_g_frequency(struct file file, void priv,
	struct v4l2_frequency *f)
	{
	struct maxiradio *dev = video_drvdata(file);

	if (f->tuner != 0)
	return -EINVAL;
	f->type = V4L2_TUNER_RADIO;
	f->frequency = dev->freq;

	dprintk(dev, 4, "radio freq is %d.%02d MHz",
	f->frequency / 16000,
	f->frequency % 16000 * 100 / 16000);

	return 0;
	}

	static int vidioc_queryctrl(struct file file, void priv,
	struct v4l2_queryctrl *qc)
	{
	switch (qc->id) {
	case V4L2_CID_AUDIO_MUTE:
	return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
	}
	return -EINVAL;
	}

	static int vidioc_g_ctrl(struct file file, void priv,
	struct v4l2_control *ctrl)
	{
	struct maxiradio *dev = video_drvdata(file);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
	ctrl->value = dev->muted;
	return 0;
	}

	return -EINVAL;
	}

	static int vidioc_s_ctrl(struct file file, void priv,
	struct v4l2_control *ctrl)
	{
	struct maxiradio *dev = video_drvdata(file);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
	mutex_lock(&dev->lock);
	dev->muted = ctrl->value;
	if (dev->muted)
	turn_power(dev, 0);
	else
	set_freq(dev, dev->freq);
	mutex_unlock(&dev->lock);
	return 0;
	}

	return -EINVAL;
	}

	static const struct v4l2_file_operations maxiradio_fops = {
	.owner = THIS_MODULE,
	.ioctl = video_ioctl2,
	};

	static const struct v4l2_ioctl_ops maxiradio_ioctl_ops = {
	.vidioc_querycap = vidioc_querycap,
	.vidioc_g_tuner = vidioc_g_tuner,
	.vidioc_s_tuner = vidioc_s_tuner,
	.vidioc_g_audio = vidioc_g_audio,
	.vidioc_s_audio = vidioc_s_audio,
	.vidioc_g_input = vidioc_g_input,
	.vidioc_s_input = vidioc_s_input,
	.vidioc_g_frequency = vidioc_g_frequency,
	.vidioc_s_frequency = vidioc_s_frequency,
	.vidioc_queryctrl = vidioc_queryctrl,
	.vidioc_g_ctrl = vidioc_g_ctrl,
	.vidioc_s_ctrl = vidioc_s_ctrl,
	};

	static int __devinit maxiradio_init_one(struct pci_dev pdev, const struct pci_device_id ent)
	{
	struct maxiradio *dev;
	struct v4l2_device *v4l2_dev;
	int retval = -ENOMEM;

	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	if (dev == NULL) {
	dev_err(&pdev->dev, "not enough memory\n");
	return -ENOMEM;
	}

	v4l2_dev = &dev->v4l2_dev;
	mutex_init(&dev->lock);
	dev->pdev = pdev;
	dev->muted = 1;
	dev->freq = FREQ_LO;

	strlcpy(v4l2_dev->name, "maxiradio", sizeof(v4l2_dev->name));

	retval = v4l2_device_register(&pdev->dev, v4l2_dev);
	if (retval < 0) {
	v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
	goto errfr;
	}

	if (!request_region(pci_resource_start(pdev, 0),
	pci_resource_len(pdev, 0), "Maxi Radio FM 2000")) {
	v4l2_err(v4l2_dev, "can't reserve I/O ports\n");
	goto err_out;
	}

	if (pci_enable_device(pdev))
	goto err_out_free_region;

	dev->io = pci_resource_start(pdev, 0);
	strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
	dev->vdev.v4l2_dev = v4l2_dev;
	dev->vdev.fops = &maxiradio_fops;
	dev->vdev.ioctl_ops = &maxiradio_ioctl_ops;
	dev->vdev.release = video_device_release_empty;
	video_set_drvdata(&dev->vdev, dev);

	if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
	v4l2_err(v4l2_dev, "can't register device!");
	goto err_out_free_region;
	}

	v4l2_info(v4l2_dev, "version " DRIVER_VERSION
	" time " __TIME__ " " __DATE__ "\n");

	v4l2_info(v4l2_dev, "found Guillemot MAXI Radio device (io = 0x%x)\n",
	dev->io);
	return 0;

	err_out_free_region:
	release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
	err_out:
	v4l2_device_unregister(v4l2_dev);
	errfr:
	kfree(dev);
	return -ENODEV;
	}

	static void __devexit maxiradio_remove_one(struct pci_dev *pdev)
	{
	struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
	struct maxiradio *dev = to_maxiradio(v4l2_dev);

	video_unregister_device(&dev->vdev);
	v4l2_device_unregister(&dev->v4l2_dev);
	release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
	}

	static struct pci_device_id maxiradio_pci_tbl[] = {
	{ PCI_VENDOR_ID_GUILLEMOT, PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO,
	PCI_ANY_ID, PCI_ANY_ID, },
	{ 0 }
	};

	MODULE_DEVICE_TABLE(pci, maxiradio_pci_tbl);

	static struct pci_driver maxiradio_driver = {
	.name = "radio-maxiradio",
	.id_table = maxiradio_pci_tbl,
	.probe = maxiradio_init_one,
	.remove = __devexit_p(maxiradio_remove_one),
	};

	static int __init maxiradio_radio_init(void)
	{
	return pci_register_driver(&maxiradio_driver);
	}

	static void __exit maxiradio_radio_exit(void)
	{
	pci_unregister_driver(&maxiradio_driver);
	}

	module_init(maxiradio_radio_init);
	module_exit(maxiradio_radio_exit);