drivers/media/radio/radio-sf16fmi.c - kernel/msm-5.4 - Gitiles

 /* SF16-FMI, SF16-FMP and SF16-FMD radio driver for Linux radio support
  * heavily based on rtrack driver...
  * (c) 1997 M. Kirkwood
  * (c) 1998 Petr Vandrovec, vandrove@vc.cvut.cz
  *
  * Fitted to new interface by Alan Cox <alan@lxorguk.ukuu.org.uk>
  * Made working and cleaned up functions <mikael.hedin@irf.se>
  * Support for ISAPnP by Ladislav Michl <ladis@psi.cz>
  *
  * Notes on the hardware
  *
  *  Frequency control is done digitally -- ie out(port,encodefreq(95.8));
  *  No volume control - only mute/unmute - you have to use line volume
  *  control on SB-part of SF16-FMI/SF16-FMP/SF16-FMD
  *
  * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
  */

 #include <linux/kernel.h>	/* __setup			*/
 #include <linux/module.h>	/* Modules 			*/
 #include <linux/init.h>		/* Initdata			*/
 #include <linux/ioport.h>	/* request_region		*/
 #include <linux/delay.h>	/* udelay			*/
 #include <linux/isapnp.h>
 #include <linux/mutex.h>
 #include <linux/videodev2.h>	/* kernel radio structs		*/
 #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-event.h>
 #include "lm7000.h"

 MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood");
 MODULE_DESCRIPTION("A driver for the SF16-FMI, SF16-FMP and SF16-FMD radio.");
 MODULE_LICENSE("GPL");
 MODULE_VERSION("0.0.3");

 static int io = -1;
 static int radio_nr = -1;

 module_param(io, int, 0);
 MODULE_PARM_DESC(io, "I/O address of the SF16-FMI/SF16-FMP/SF16-FMD card (0x284 or 0x384)");
 module_param(radio_nr, int, 0);

 struct fmi
 {
 	struct v4l2_device v4l2_dev;
 	struct v4l2_ctrl_handler hdl;
 	struct video_device vdev;
 	int io;
 	bool mute;
 	u32 curfreq; /* freq in kHz */
 	struct mutex lock;
 };

 static struct fmi fmi_card;
 static struct pnp_dev *dev;
 bool pnp_attached;

 #define RSF16_MINFREQ (87U * 16000)
 #define RSF16_MAXFREQ (108U * 16000)

 #define FMI_BIT_TUN_CE		(1 << 0)
 #define FMI_BIT_TUN_CLK		(1 << 1)
 #define FMI_BIT_TUN_DATA	(1 << 2)
 #define FMI_BIT_VOL_SW		(1 << 3)
 #define FMI_BIT_TUN_STRQ	(1 << 4)

 static void fmi_set_pins(void *handle, u8 pins)
 {
 	struct fmi *fmi = handle;
 	u8 bits = FMI_BIT_TUN_STRQ;

 	if (!fmi->mute)
 		bits |= FMI_BIT_VOL_SW;

 	if (pins & LM7000_DATA)
 		bits |= FMI_BIT_TUN_DATA;
 	if (pins & LM7000_CLK)
 		bits |= FMI_BIT_TUN_CLK;
 	if (pins & LM7000_CE)
 		bits |= FMI_BIT_TUN_CE;

 	mutex_lock(&fmi->lock);
 	outb_p(bits, fmi->io);
 	mutex_unlock(&fmi->lock);
 }

 static inline void fmi_mute(struct fmi *fmi)
 {
 	mutex_lock(&fmi->lock);
 	outb(0x00, fmi->io);
 	mutex_unlock(&fmi->lock);
 }

 static inline void fmi_unmute(struct fmi *fmi)
 {
 	mutex_lock(&fmi->lock);
 	outb(0x08, fmi->io);
 	mutex_unlock(&fmi->lock);
 }

 static inline int fmi_getsigstr(struct fmi *fmi)
 {
 	int val;
 	int res;

 	mutex_lock(&fmi->lock);
 	val = fmi->mute ? 0x00 : 0x08;	/* mute/unmute */
 	outb(val, fmi->io);
 	outb(val | 0x10, fmi->io);
 	msleep(143); 		/* was schedule_timeout(HZ/7) */
 	res = (int)inb(fmi->io + 1);
 	outb(val, fmi->io);

 	mutex_unlock(&fmi->lock);
 	return (res & 2) ? 0 : 0xFFFF;
 }

 static void fmi_set_freq(struct fmi *fmi)
 {
 	fmi->curfreq = clamp(fmi->curfreq, RSF16_MINFREQ, RSF16_MAXFREQ);
 	/* rounding in steps of 800 to match the freq
 	   that will be used */
 	lm7000_set_freq((fmi->curfreq / 800) * 800, fmi, fmi_set_pins);
 }

 static int vidioc_querycap(struct file *file, void  *priv,
 					struct v4l2_capability *v)
 {
 	strlcpy(v->driver, "radio-sf16fmi", sizeof(v->driver));
 	strlcpy(v->card, "SF16-FMI/FMP/FMD radio", sizeof(v->card));
 	strlcpy(v->bus_info, "ISA:radio-sf16fmi", sizeof(v->bus_info));
 	v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
 	v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
 	return 0;
 }

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

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

 	strlcpy(v->name, "FM", sizeof(v->name));
 	v->type = V4L2_TUNER_RADIO;
 	v->rangelow = RSF16_MINFREQ;
 	v->rangehigh = RSF16_MAXFREQ;
 	v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
 	v->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW;
 	v->audmode = V4L2_TUNER_MODE_STEREO;
 	v->signal = fmi_getsigstr(fmi);
 	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_s_frequency(struct file *file, void *priv,
 					const struct v4l2_frequency *f)
 {
 	struct fmi *fmi = video_drvdata(file);

 	if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
 		return -EINVAL;

 	fmi->curfreq = f->frequency;
 	fmi_set_freq(fmi);

 	return 0;
 }

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

 	if (f->tuner != 0)
 		return -EINVAL;
 	f->type = V4L2_TUNER_RADIO;
 	f->frequency = fmi->curfreq;
 	return 0;
 }

 static int fmi_s_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct fmi *fmi = container_of(ctrl->handler, struct fmi, hdl);

 	switch (ctrl->id) {
 	case V4L2_CID_AUDIO_MUTE:
 		if (ctrl->val)
 			fmi_mute(fmi);
 		else
 			fmi_unmute(fmi);
 		fmi->mute = ctrl->val;
 		return 0;
 	}
 	return -EINVAL;
 }

 static const struct v4l2_ctrl_ops fmi_ctrl_ops = {
 	.s_ctrl = fmi_s_ctrl,
 };

 static const struct v4l2_file_operations fmi_fops = {
 	.owner		= THIS_MODULE,
 	.open		= v4l2_fh_open,
 	.release	= v4l2_fh_release,
 	.poll		= v4l2_ctrl_poll,
 	.unlocked_ioctl	= video_ioctl2,
 };

 static const struct v4l2_ioctl_ops fmi_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_log_status  = v4l2_ctrl_log_status,
 	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
 	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
 };

 /* ladis: this is my card. does any other types exist? */
 static struct isapnp_device_id id_table[] = {
 		/* SF16-FMI */
 	{	ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 		ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0},
 		/* SF16-FMD */
 	{	ISAPNP_ANY_ID, ISAPNP_ANY_ID,
 		ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad12), 0},
 	{	ISAPNP_CARD_END, },
 };

 MODULE_DEVICE_TABLE(isapnp, id_table);

 static int __init isapnp_fmi_probe(void)
 {
 	int i = 0;

 	while (id_table[i].card_vendor != 0 && dev == NULL) {
 		dev = pnp_find_dev(NULL, id_table[i].vendor,
 				   id_table[i].function, NULL);
 		i++;
 	}

 	if (!dev)
 		return -ENODEV;
 	if (pnp_device_attach(dev) < 0)
 		return -EAGAIN;
 	if (pnp_activate_dev(dev) < 0) {
 		printk(KERN_ERR "radio-sf16fmi: PnP configure failed (out of resources?)\n");
 		pnp_device_detach(dev);
 		return -ENOMEM;
 	}
 	if (!pnp_port_valid(dev, 0)) {
 		pnp_device_detach(dev);
 		return -ENODEV;
 	}

 	i = pnp_port_start(dev, 0);
 	printk(KERN_INFO "radio-sf16fmi: PnP reports card at %#x\n", i);

 	return i;
 }

 static int __init fmi_init(void)
 {
 	struct fmi *fmi = &fmi_card;
 	struct v4l2_device *v4l2_dev = &fmi->v4l2_dev;
 	struct v4l2_ctrl_handler *hdl = &fmi->hdl;
 	int res, i;
 	int probe_ports[] = { 0, 0x284, 0x384 };

 	if (io < 0) {
 		for (i = 0; i < ARRAY_SIZE(probe_ports); i++) {
 			io = probe_ports[i];
 			if (io == 0) {
 				io = isapnp_fmi_probe();
 				if (io < 0)
 					continue;
 				pnp_attached = 1;
 			}
 			if (!request_region(io, 2, "radio-sf16fmi")) {
 				if (pnp_attached)
 					pnp_device_detach(dev);
 				io = -1;
 				continue;
 			}
 			if (pnp_attached ||
 			    ((inb(io) & 0xf9) == 0xf9 && (inb(io) & 0x4) == 0))
 				break;
 			release_region(io, 2);
 			io = -1;
 		}
 	} else {
 		if (!request_region(io, 2, "radio-sf16fmi")) {
 			printk(KERN_ERR "radio-sf16fmi: port %#x already in use\n", io);
 			return -EBUSY;
 		}
 		if (inb(io) == 0xff) {
 			printk(KERN_ERR "radio-sf16fmi: card not present at %#x\n", io);
 			release_region(io, 2);
 			return -ENODEV;
 		}
 	}
 	if (io < 0) {
 		printk(KERN_ERR "radio-sf16fmi: no cards found\n");
 		return -ENODEV;
 	}

 	strlcpy(v4l2_dev->name, "sf16fmi", sizeof(v4l2_dev->name));
 	fmi->io = io;

 	res = v4l2_device_register(NULL, v4l2_dev);
 	if (res < 0) {
 		release_region(fmi->io, 2);
 		if (pnp_attached)
 			pnp_device_detach(dev);
 		v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
 		return res;
 	}

 	v4l2_ctrl_handler_init(hdl, 1);
 	v4l2_ctrl_new_std(hdl, &fmi_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");
 		v4l2_ctrl_handler_free(hdl);
 		v4l2_device_unregister(v4l2_dev);
 		return res;
 	}

 	strlcpy(fmi->vdev.name, v4l2_dev->name, sizeof(fmi->vdev.name));
 	fmi->vdev.v4l2_dev = v4l2_dev;
 	fmi->vdev.fops = &fmi_fops;
 	fmi->vdev.ioctl_ops = &fmi_ioctl_ops;
 	fmi->vdev.release = video_device_release_empty;
 	set_bit(V4L2_FL_USE_FH_PRIO, &fmi->vdev.flags);
 	video_set_drvdata(&fmi->vdev, fmi);

 	mutex_init(&fmi->lock);

 	/* mute card and set default frequency */
 	fmi->mute = 1;
 	fmi->curfreq = RSF16_MINFREQ;
 	fmi_set_freq(fmi);

 	if (video_register_device(&fmi->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
 		v4l2_ctrl_handler_free(hdl);
 		v4l2_device_unregister(v4l2_dev);
 		release_region(fmi->io, 2);
 		if (pnp_attached)
 			pnp_device_detach(dev);
 		return -EINVAL;
 	}

 	v4l2_info(v4l2_dev, "card driver at 0x%x\n", fmi->io);
 	return 0;
 }

 static void __exit fmi_exit(void)
 {
 	struct fmi *fmi = &fmi_card;

 	v4l2_ctrl_handler_free(&fmi->hdl);
 	video_unregister_device(&fmi->vdev);
 	v4l2_device_unregister(&fmi->v4l2_dev);
 	release_region(fmi->io, 2);
 	if (dev && pnp_attached)
 		pnp_device_detach(dev);
 }

 module_init(fmi_init);
 module_exit(fmi_exit);
	/* SF16-FMI, SF16-FMP and SF16-FMD radio driver for Linux radio support
	* heavily based on rtrack driver...
	* (c) 1997 M. Kirkwood
	* (c) 1998 Petr Vandrovec, vandrove@vc.cvut.cz
	*
	* Fitted to new interface by Alan Cox <alan@lxorguk.ukuu.org.uk>
	* Made working and cleaned up functions <mikael.hedin@irf.se>
	* Support for ISAPnP by Ladislav Michl <ladis@psi.cz>
	*
	* Notes on the hardware
	*
	* Frequency control is done digitally -- ie out(port,encodefreq(95.8));
	* No volume control - only mute/unmute - you have to use line volume
	* control on SB-part of SF16-FMI/SF16-FMP/SF16-FMD
	*
	* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
	*/

	#include <linux/kernel.h> /* __setup */
	#include <linux/module.h> /* Modules */
	#include <linux/init.h> /* Initdata */
	#include <linux/ioport.h> /* request_region */
	#include <linux/delay.h> /* udelay */
	#include <linux/isapnp.h>
	#include <linux/mutex.h>
	#include <linux/videodev2.h> /* kernel radio structs */
	#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-event.h>
	#include "lm7000.h"

	MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood");
	MODULE_DESCRIPTION("A driver for the SF16-FMI, SF16-FMP and SF16-FMD radio.");
	MODULE_LICENSE("GPL");
	MODULE_VERSION("0.0.3");

	static int io = -1;
	static int radio_nr = -1;

	module_param(io, int, 0);
	MODULE_PARM_DESC(io, "I/O address of the SF16-FMI/SF16-FMP/SF16-FMD card (0x284 or 0x384)");
	module_param(radio_nr, int, 0);

	struct fmi
	{
	struct v4l2_device v4l2_dev;
	struct v4l2_ctrl_handler hdl;
	struct video_device vdev;
	int io;
	bool mute;
	u32 curfreq; /* freq in kHz */
	struct mutex lock;
	};

	static struct fmi fmi_card;
	static struct pnp_dev *dev;
	bool pnp_attached;

	#define RSF16_MINFREQ (87U * 16000)
	#define RSF16_MAXFREQ (108U * 16000)

	#define FMI_BIT_TUN_CE (1 << 0)
	#define FMI_BIT_TUN_CLK (1 << 1)
	#define FMI_BIT_TUN_DATA (1 << 2)
	#define FMI_BIT_VOL_SW (1 << 3)
	#define FMI_BIT_TUN_STRQ (1 << 4)

	static void fmi_set_pins(void *handle, u8 pins)
	{
	struct fmi *fmi = handle;
	u8 bits = FMI_BIT_TUN_STRQ;

	if (!fmi->mute)
	bits \|= FMI_BIT_VOL_SW;

	if (pins & LM7000_DATA)
	bits \|= FMI_BIT_TUN_DATA;
	if (pins & LM7000_CLK)
	bits \|= FMI_BIT_TUN_CLK;
	if (pins & LM7000_CE)
	bits \|= FMI_BIT_TUN_CE;

	mutex_lock(&fmi->lock);
	outb_p(bits, fmi->io);
	mutex_unlock(&fmi->lock);
	}

	static inline void fmi_mute(struct fmi *fmi)
	{
	mutex_lock(&fmi->lock);
	outb(0x00, fmi->io);
	mutex_unlock(&fmi->lock);
	}

	static inline void fmi_unmute(struct fmi *fmi)
	{
	mutex_lock(&fmi->lock);
	outb(0x08, fmi->io);
	mutex_unlock(&fmi->lock);
	}

	static inline int fmi_getsigstr(struct fmi *fmi)
	{
	int val;
	int res;

	mutex_lock(&fmi->lock);
	val = fmi->mute ? 0x00 : 0x08; /* mute/unmute */
	outb(val, fmi->io);
	outb(val \| 0x10, fmi->io);
	msleep(143); /* was schedule_timeout(HZ/7) */
	res = (int)inb(fmi->io + 1);
	outb(val, fmi->io);

	mutex_unlock(&fmi->lock);
	return (res & 2) ? 0 : 0xFFFF;
	}

	static void fmi_set_freq(struct fmi *fmi)
	{
	fmi->curfreq = clamp(fmi->curfreq, RSF16_MINFREQ, RSF16_MAXFREQ);
	/* rounding in steps of 800 to match the freq
	that will be used */
	lm7000_set_freq((fmi->curfreq / 800) * 800, fmi, fmi_set_pins);
	}

	static int vidioc_querycap(struct file file, void priv,
	struct v4l2_capability *v)
	{
	strlcpy(v->driver, "radio-sf16fmi", sizeof(v->driver));
	strlcpy(v->card, "SF16-FMI/FMP/FMD radio", sizeof(v->card));
	strlcpy(v->bus_info, "ISA:radio-sf16fmi", sizeof(v->bus_info));
	v->device_caps = V4L2_CAP_TUNER \| V4L2_CAP_RADIO;
	v->capabilities = v->device_caps \| V4L2_CAP_DEVICE_CAPS;
	return 0;
	}

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

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

	strlcpy(v->name, "FM", sizeof(v->name));
	v->type = V4L2_TUNER_RADIO;
	v->rangelow = RSF16_MINFREQ;
	v->rangehigh = RSF16_MAXFREQ;
	v->rxsubchans = V4L2_TUNER_SUB_MONO \| V4L2_TUNER_SUB_STEREO;
	v->capability = V4L2_TUNER_CAP_STEREO \| V4L2_TUNER_CAP_LOW;
	v->audmode = V4L2_TUNER_MODE_STEREO;
	v->signal = fmi_getsigstr(fmi);
	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_s_frequency(struct file file, void priv,
	const struct v4l2_frequency *f)
	{
	struct fmi *fmi = video_drvdata(file);

	if (f->tuner != 0 \|\| f->type != V4L2_TUNER_RADIO)
	return -EINVAL;

	fmi->curfreq = f->frequency;
	fmi_set_freq(fmi);

	return 0;
	}

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

	if (f->tuner != 0)
	return -EINVAL;
	f->type = V4L2_TUNER_RADIO;
	f->frequency = fmi->curfreq;
	return 0;
	}

	static int fmi_s_ctrl(struct v4l2_ctrl *ctrl)
	{
	struct fmi *fmi = container_of(ctrl->handler, struct fmi, hdl);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
	if (ctrl->val)
	fmi_mute(fmi);
	else
	fmi_unmute(fmi);
	fmi->mute = ctrl->val;
	return 0;
	}
	return -EINVAL;
	}

	static const struct v4l2_ctrl_ops fmi_ctrl_ops = {
	.s_ctrl = fmi_s_ctrl,
	};

	static const struct v4l2_file_operations fmi_fops = {
	.owner = THIS_MODULE,
	.open = v4l2_fh_open,
	.release = v4l2_fh_release,
	.poll = v4l2_ctrl_poll,
	.unlocked_ioctl = video_ioctl2,
	};

	static const struct v4l2_ioctl_ops fmi_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_log_status = v4l2_ctrl_log_status,
	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
	};

	/* ladis: this is my card. does any other types exist? */
	static struct isapnp_device_id id_table[] = {
	/* SF16-FMI */
	{ ISAPNP_ANY_ID, ISAPNP_ANY_ID,
	ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0},
	/* SF16-FMD */
	{ ISAPNP_ANY_ID, ISAPNP_ANY_ID,
	ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad12), 0},
	{ ISAPNP_CARD_END, },
	};

	MODULE_DEVICE_TABLE(isapnp, id_table);

	static int __init isapnp_fmi_probe(void)
	{
	int i = 0;

	while (id_table[i].card_vendor != 0 && dev == NULL) {
	dev = pnp_find_dev(NULL, id_table[i].vendor,
	id_table[i].function, NULL);
	i++;
	}

	if (!dev)
	return -ENODEV;
	if (pnp_device_attach(dev) < 0)
	return -EAGAIN;
	if (pnp_activate_dev(dev) < 0) {
	printk(KERN_ERR "radio-sf16fmi: PnP configure failed (out of resources?)\n");
	pnp_device_detach(dev);
	return -ENOMEM;
	}
	if (!pnp_port_valid(dev, 0)) {
	pnp_device_detach(dev);
	return -ENODEV;
	}

	i = pnp_port_start(dev, 0);
	printk(KERN_INFO "radio-sf16fmi: PnP reports card at %#x\n", i);

	return i;
	}

	static int __init fmi_init(void)
	{
	struct fmi *fmi = &fmi_card;
	struct v4l2_device *v4l2_dev = &fmi->v4l2_dev;
	struct v4l2_ctrl_handler *hdl = &fmi->hdl;
	int res, i;
	int probe_ports[] = { 0, 0x284, 0x384 };

	if (io < 0) {
	for (i = 0; i < ARRAY_SIZE(probe_ports); i++) {
	io = probe_ports[i];
	if (io == 0) {
	io = isapnp_fmi_probe();
	if (io < 0)
	continue;
	pnp_attached = 1;
	}
	if (!request_region(io, 2, "radio-sf16fmi")) {
	if (pnp_attached)
	pnp_device_detach(dev);
	io = -1;
	continue;
	}
	if (pnp_attached \|\|
	((inb(io) & 0xf9) == 0xf9 && (inb(io) & 0x4) == 0))
	break;
	release_region(io, 2);
	io = -1;
	}
	} else {
	if (!request_region(io, 2, "radio-sf16fmi")) {
	printk(KERN_ERR "radio-sf16fmi: port %#x already in use\n", io);
	return -EBUSY;
	}
	if (inb(io) == 0xff) {
	printk(KERN_ERR "radio-sf16fmi: card not present at %#x\n", io);
	release_region(io, 2);
	return -ENODEV;
	}
	}
	if (io < 0) {
	printk(KERN_ERR "radio-sf16fmi: no cards found\n");
	return -ENODEV;
	}

	strlcpy(v4l2_dev->name, "sf16fmi", sizeof(v4l2_dev->name));
	fmi->io = io;

	res = v4l2_device_register(NULL, v4l2_dev);
	if (res < 0) {
	release_region(fmi->io, 2);
	if (pnp_attached)
	pnp_device_detach(dev);
	v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
	return res;
	}

	v4l2_ctrl_handler_init(hdl, 1);
	v4l2_ctrl_new_std(hdl, &fmi_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");
	v4l2_ctrl_handler_free(hdl);
	v4l2_device_unregister(v4l2_dev);
	return res;
	}

	strlcpy(fmi->vdev.name, v4l2_dev->name, sizeof(fmi->vdev.name));
	fmi->vdev.v4l2_dev = v4l2_dev;
	fmi->vdev.fops = &fmi_fops;
	fmi->vdev.ioctl_ops = &fmi_ioctl_ops;
	fmi->vdev.release = video_device_release_empty;
	set_bit(V4L2_FL_USE_FH_PRIO, &fmi->vdev.flags);
	video_set_drvdata(&fmi->vdev, fmi);

	mutex_init(&fmi->lock);

	/* mute card and set default frequency */
	fmi->mute = 1;
	fmi->curfreq = RSF16_MINFREQ;
	fmi_set_freq(fmi);

	if (video_register_device(&fmi->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
	v4l2_ctrl_handler_free(hdl);
	v4l2_device_unregister(v4l2_dev);
	release_region(fmi->io, 2);
	if (pnp_attached)
	pnp_device_detach(dev);
	return -EINVAL;
	}

	v4l2_info(v4l2_dev, "card driver at 0x%x\n", fmi->io);
	return 0;
	}

	static void __exit fmi_exit(void)
	{
	struct fmi *fmi = &fmi_card;

	v4l2_ctrl_handler_free(&fmi->hdl);
	video_unregister_device(&fmi->vdev);
	v4l2_device_unregister(&fmi->v4l2_dev);
	release_region(fmi->io, 2);
	if (dev && pnp_attached)
	pnp_device_detach(dev);
	}

	module_init(fmi_init);
	module_exit(fmi_exit);