drivers/media/radio/radio-rtrack2.c - kernel/msm-4.19 - Gitiles

 /* RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff
  *
  * Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
  * Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk>
  * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
  *
  * TODO: Allow for more than one of these foolish entities :-)
  *
  * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
  */

 #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>	/* kernel radio structs		*/
 #include <linux/mutex.h>
 #include <linux/version.h>      /* for KERNEL_VERSION MACRO     */
 #include <linux/io.h>		/* outb, outb_p			*/
 #include <media/v4l2-device.h>
 #include <media/v4l2-ioctl.h>

 MODULE_AUTHOR("Ben Pfaff");
 MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
 MODULE_LICENSE("GPL");

 #ifndef CONFIG_RADIO_RTRACK2_PORT
 #define CONFIG_RADIO_RTRACK2_PORT -1
 #endif

 static int io = CONFIG_RADIO_RTRACK2_PORT;
 static int radio_nr = -1;

 module_param(io, int, 0);
 MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)");
 module_param(radio_nr, int, 0);

 #define RADIO_VERSION KERNEL_VERSION(0, 0, 2)

 struct rtrack2
 {
 	struct v4l2_device v4l2_dev;
 	struct video_device vdev;
 	int io;
 	unsigned long curfreq;
 	int muted;
 	struct mutex lock;
 };

 static struct rtrack2 rtrack2_card;


 /* local things */

 static void rt_mute(struct rtrack2 *dev)
 {
 	if (dev->muted)
 		return;
 	mutex_lock(&dev->lock);
 	outb(1, dev->io);
 	mutex_unlock(&dev->lock);
 	dev->muted = 1;
 }

 static void rt_unmute(struct rtrack2 *dev)
 {
 	if(dev->muted == 0)
 		return;
 	mutex_lock(&dev->lock);
 	outb(0, dev->io);
 	mutex_unlock(&dev->lock);
 	dev->muted = 0;
 }

 static void zero(struct rtrack2 *dev)
 {
 	outb_p(1, dev->io);
 	outb_p(3, dev->io);
 	outb_p(1, dev->io);
 }

 static void one(struct rtrack2 *dev)
 {
 	outb_p(5, dev->io);
 	outb_p(7, dev->io);
 	outb_p(5, dev->io);
 }

 static int rt_setfreq(struct rtrack2 *dev, unsigned long freq)
 {
 	int i;

 	mutex_lock(&dev->lock);
 	dev->curfreq = freq;
 	freq = freq / 200 + 856;

 	outb_p(0xc8, dev->io);
 	outb_p(0xc9, dev->io);
 	outb_p(0xc9, dev->io);

 	for (i = 0; i < 10; i++)
 		zero(dev);

 	for (i = 14; i >= 0; i--)
 		if (freq & (1 << i))
 			one(dev);
 		else
 			zero(dev);

 	outb_p(0xc8, dev->io);
 	if (!dev->muted)
 		outb_p(0, dev->io);

 	mutex_unlock(&dev->lock);
 	return 0;
 }

 static int vidioc_querycap(struct file *file, void *priv,
 				struct v4l2_capability *v)
 {
 	strlcpy(v->driver, "radio-rtrack2", sizeof(v->driver));
 	strlcpy(v->card, "RadioTrack II", sizeof(v->card));
 	strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
 	v->version = RADIO_VERSION;
 	v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
 	return 0;
 }

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

 static int rt_getsigstr(struct rtrack2 *dev)
 {
 	int sig = 1;

 	mutex_lock(&dev->lock);
 	if (inb(dev->io) & 2)	/* bit set = no signal present	*/
 		sig = 0;
 	mutex_unlock(&dev->lock);
 	return sig;
 }

 static int vidioc_g_tuner(struct file *file, void *priv,
 				struct v4l2_tuner *v)
 {
 	struct rtrack2 *rt = video_drvdata(file);

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

 	strlcpy(v->name, "FM", sizeof(v->name));
 	v->type = V4L2_TUNER_RADIO;
 	v->rangelow = 88 * 16000;
 	v->rangehigh = 108 * 16000;
 	v->rxsubchans = V4L2_TUNER_SUB_MONO;
 	v->capability = V4L2_TUNER_CAP_LOW;
 	v->audmode = V4L2_TUNER_MODE_MONO;
 	v->signal = 0xFFFF * rt_getsigstr(rt);
 	return 0;
 }

 static int vidioc_s_frequency(struct file *file, void *priv,
 				struct v4l2_frequency *f)
 {
 	struct rtrack2 *rt = video_drvdata(file);

 	if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
 		return -EINVAL;
 	rt_setfreq(rt, f->frequency);
 	return 0;
 }

 static int vidioc_g_frequency(struct file *file, void *priv,
 				struct v4l2_frequency *f)
 {
 	struct rtrack2 *rt = video_drvdata(file);

 	if (f->tuner != 0)
 		return -EINVAL;
 	f->type = V4L2_TUNER_RADIO;
 	f->frequency = rt->curfreq;
 	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);
 	case V4L2_CID_AUDIO_VOLUME:
 		return v4l2_ctrl_query_fill(qc, 0, 65535, 65535, 65535);
 	}
 	return -EINVAL;
 }

 static int vidioc_g_ctrl(struct file *file, void *priv,
 				struct v4l2_control *ctrl)
 {
 	struct rtrack2 *rt = video_drvdata(file);

 	switch (ctrl->id) {
 	case V4L2_CID_AUDIO_MUTE:
 		ctrl->value = rt->muted;
 		return 0;
 	case V4L2_CID_AUDIO_VOLUME:
 		if (rt->muted)
 			ctrl->value = 0;
 		else
 			ctrl->value = 65535;
 		return 0;
 	}
 	return -EINVAL;
 }

 static int vidioc_s_ctrl(struct file *file, void *priv,
 				struct v4l2_control *ctrl)
 {
 	struct rtrack2 *rt = video_drvdata(file);

 	switch (ctrl->id) {
 	case V4L2_CID_AUDIO_MUTE:
 		if (ctrl->value)
 			rt_mute(rt);
 		else
 			rt_unmute(rt);
 		return 0;
 	case V4L2_CID_AUDIO_VOLUME:
 		if (ctrl->value)
 			rt_unmute(rt);
 		else
 			rt_mute(rt);
 		return 0;
 	}
 	return -EINVAL;
 }

 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 const struct v4l2_file_operations rtrack2_fops = {
 	.owner		= THIS_MODULE,
 	.unlocked_ioctl	= video_ioctl2,
 };

 static const struct v4l2_ioctl_ops rtrack2_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_queryctrl   = vidioc_queryctrl,
 	.vidioc_g_ctrl      = vidioc_g_ctrl,
 	.vidioc_s_ctrl      = vidioc_s_ctrl,
 	.vidioc_g_audio     = vidioc_g_audio,
 	.vidioc_s_audio     = vidioc_s_audio,
 	.vidioc_g_input     = vidioc_g_input,
 	.vidioc_s_input     = vidioc_s_input,
 };

 static int __init rtrack2_init(void)
 {
 	struct rtrack2 *dev = &rtrack2_card;
 	struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
 	int res;

 	strlcpy(v4l2_dev->name, "rtrack2", sizeof(v4l2_dev->name));
 	dev->io = io;
 	if (dev->io == -1) {
 		v4l2_err(v4l2_dev, "You must set an I/O address with io=0x20c or io=0x30c\n");
 		return -EINVAL;
 	}
 	if (!request_region(dev->io, 4, "rtrack2")) {
 		v4l2_err(v4l2_dev, "port 0x%x already in use\n", dev->io);
 		return -EBUSY;
 	}

 	res = v4l2_device_register(NULL, v4l2_dev);
 	if (res < 0) {
 		release_region(dev->io, 4);
 		v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
 		return res;
 	}

 	strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
 	dev->vdev.v4l2_dev = v4l2_dev;
 	dev->vdev.fops = &rtrack2_fops;
 	dev->vdev.ioctl_ops = &rtrack2_ioctl_ops;
 	dev->vdev.release = video_device_release_empty;
 	video_set_drvdata(&dev->vdev, dev);

 	/* mute card - prevents noisy bootups */
 	outb(1, dev->io);
 	dev->muted = 1;

 	mutex_init(&dev->lock);
 	if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
 		v4l2_device_unregister(v4l2_dev);
 		release_region(dev->io, 4);
 		return -EINVAL;
 	}

 	v4l2_info(v4l2_dev, "AIMSlab Radiotrack II card driver.\n");

 	return 0;
 }

 static void __exit rtrack2_exit(void)
 {
 	struct rtrack2 *dev = &rtrack2_card;

 	video_unregister_device(&dev->vdev);
 	v4l2_device_unregister(&dev->v4l2_dev);
 	release_region(dev->io, 4);
 }

 module_init(rtrack2_init);
 module_exit(rtrack2_exit);
	/* RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff
	*
	* Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
	* Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk>
	* Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
	*
	* TODO: Allow for more than one of these foolish entities :-)
	*
	* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
	*/

	#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> /* kernel radio structs */
	#include <linux/mutex.h>
	#include <linux/version.h> /* for KERNEL_VERSION MACRO */
	#include <linux/io.h> /* outb, outb_p */
	#include <media/v4l2-device.h>
	#include <media/v4l2-ioctl.h>

	MODULE_AUTHOR("Ben Pfaff");
	MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
	MODULE_LICENSE("GPL");

	#ifndef CONFIG_RADIO_RTRACK2_PORT
	#define CONFIG_RADIO_RTRACK2_PORT -1
	#endif

	static int io = CONFIG_RADIO_RTRACK2_PORT;
	static int radio_nr = -1;

	module_param(io, int, 0);
	MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)");
	module_param(radio_nr, int, 0);

	#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)

	struct rtrack2
	{
	struct v4l2_device v4l2_dev;
	struct video_device vdev;
	int io;
	unsigned long curfreq;
	int muted;
	struct mutex lock;
	};

	static struct rtrack2 rtrack2_card;


	/* local things */

	static void rt_mute(struct rtrack2 *dev)
	{
	if (dev->muted)
	return;
	mutex_lock(&dev->lock);
	outb(1, dev->io);
	mutex_unlock(&dev->lock);
	dev->muted = 1;
	}

	static void rt_unmute(struct rtrack2 *dev)
	{
	if(dev->muted == 0)
	return;
	mutex_lock(&dev->lock);
	outb(0, dev->io);
	mutex_unlock(&dev->lock);
	dev->muted = 0;
	}

	static void zero(struct rtrack2 *dev)
	{
	outb_p(1, dev->io);
	outb_p(3, dev->io);
	outb_p(1, dev->io);
	}

	static void one(struct rtrack2 *dev)
	{
	outb_p(5, dev->io);
	outb_p(7, dev->io);
	outb_p(5, dev->io);
	}

	static int rt_setfreq(struct rtrack2 *dev, unsigned long freq)
	{
	int i;

	mutex_lock(&dev->lock);
	dev->curfreq = freq;
	freq = freq / 200 + 856;

	outb_p(0xc8, dev->io);
	outb_p(0xc9, dev->io);
	outb_p(0xc9, dev->io);

	for (i = 0; i < 10; i++)
	zero(dev);

	for (i = 14; i >= 0; i--)
	if (freq & (1 << i))
	one(dev);
	else
	zero(dev);

	outb_p(0xc8, dev->io);
	if (!dev->muted)
	outb_p(0, dev->io);

	mutex_unlock(&dev->lock);
	return 0;
	}

	static int vidioc_querycap(struct file file, void priv,
	struct v4l2_capability *v)
	{
	strlcpy(v->driver, "radio-rtrack2", sizeof(v->driver));
	strlcpy(v->card, "RadioTrack II", sizeof(v->card));
	strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
	v->version = RADIO_VERSION;
	v->capabilities = V4L2_CAP_TUNER \| V4L2_CAP_RADIO;
	return 0;
	}

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

	static int rt_getsigstr(struct rtrack2 *dev)
	{
	int sig = 1;

	mutex_lock(&dev->lock);
	if (inb(dev->io) & 2) /* bit set = no signal present */
	sig = 0;
	mutex_unlock(&dev->lock);
	return sig;
	}

	static int vidioc_g_tuner(struct file file, void priv,
	struct v4l2_tuner *v)
	{
	struct rtrack2 *rt = video_drvdata(file);

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

	strlcpy(v->name, "FM", sizeof(v->name));
	v->type = V4L2_TUNER_RADIO;
	v->rangelow = 88 * 16000;
	v->rangehigh = 108 * 16000;
	v->rxsubchans = V4L2_TUNER_SUB_MONO;
	v->capability = V4L2_TUNER_CAP_LOW;
	v->audmode = V4L2_TUNER_MODE_MONO;
	v->signal = 0xFFFF * rt_getsigstr(rt);
	return 0;
	}

	static int vidioc_s_frequency(struct file file, void priv,
	struct v4l2_frequency *f)
	{
	struct rtrack2 *rt = video_drvdata(file);

	if (f->tuner != 0 \|\| f->type != V4L2_TUNER_RADIO)
	return -EINVAL;
	rt_setfreq(rt, f->frequency);
	return 0;
	}

	static int vidioc_g_frequency(struct file file, void priv,
	struct v4l2_frequency *f)
	{
	struct rtrack2 *rt = video_drvdata(file);

	if (f->tuner != 0)
	return -EINVAL;
	f->type = V4L2_TUNER_RADIO;
	f->frequency = rt->curfreq;
	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);
	case V4L2_CID_AUDIO_VOLUME:
	return v4l2_ctrl_query_fill(qc, 0, 65535, 65535, 65535);
	}
	return -EINVAL;
	}

	static int vidioc_g_ctrl(struct file file, void priv,
	struct v4l2_control *ctrl)
	{
	struct rtrack2 *rt = video_drvdata(file);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
	ctrl->value = rt->muted;
	return 0;
	case V4L2_CID_AUDIO_VOLUME:
	if (rt->muted)
	ctrl->value = 0;
	else
	ctrl->value = 65535;
	return 0;
	}
	return -EINVAL;
	}

	static int vidioc_s_ctrl(struct file file, void priv,
	struct v4l2_control *ctrl)
	{
	struct rtrack2 *rt = video_drvdata(file);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
	if (ctrl->value)
	rt_mute(rt);
	else
	rt_unmute(rt);
	return 0;
	case V4L2_CID_AUDIO_VOLUME:
	if (ctrl->value)
	rt_unmute(rt);
	else
	rt_mute(rt);
	return 0;
	}
	return -EINVAL;
	}

	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 const struct v4l2_file_operations rtrack2_fops = {
	.owner = THIS_MODULE,
	.unlocked_ioctl = video_ioctl2,
	};

	static const struct v4l2_ioctl_ops rtrack2_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_queryctrl = vidioc_queryctrl,
	.vidioc_g_ctrl = vidioc_g_ctrl,
	.vidioc_s_ctrl = vidioc_s_ctrl,
	.vidioc_g_audio = vidioc_g_audio,
	.vidioc_s_audio = vidioc_s_audio,
	.vidioc_g_input = vidioc_g_input,
	.vidioc_s_input = vidioc_s_input,
	};

	static int __init rtrack2_init(void)
	{
	struct rtrack2 *dev = &rtrack2_card;
	struct v4l2_device *v4l2_dev = &dev->v4l2_dev;
	int res;

	strlcpy(v4l2_dev->name, "rtrack2", sizeof(v4l2_dev->name));
	dev->io = io;
	if (dev->io == -1) {
	v4l2_err(v4l2_dev, "You must set an I/O address with io=0x20c or io=0x30c\n");
	return -EINVAL;
	}
	if (!request_region(dev->io, 4, "rtrack2")) {
	v4l2_err(v4l2_dev, "port 0x%x already in use\n", dev->io);
	return -EBUSY;
	}

	res = v4l2_device_register(NULL, v4l2_dev);
	if (res < 0) {
	release_region(dev->io, 4);
	v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
	return res;
	}

	strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
	dev->vdev.v4l2_dev = v4l2_dev;
	dev->vdev.fops = &rtrack2_fops;
	dev->vdev.ioctl_ops = &rtrack2_ioctl_ops;
	dev->vdev.release = video_device_release_empty;
	video_set_drvdata(&dev->vdev, dev);

	/* mute card - prevents noisy bootups */
	outb(1, dev->io);
	dev->muted = 1;

	mutex_init(&dev->lock);
	if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
	v4l2_device_unregister(v4l2_dev);
	release_region(dev->io, 4);
	return -EINVAL;
	}

	v4l2_info(v4l2_dev, "AIMSlab Radiotrack II card driver.\n");

	return 0;
	}

	static void __exit rtrack2_exit(void)
	{
	struct rtrack2 *dev = &rtrack2_card;

	video_unregister_device(&dev->vdev);
	v4l2_device_unregister(&dev->v4l2_dev);
	release_region(dev->io, 4);
	}

	module_init(rtrack2_init);
	module_exit(rtrack2_exit);