[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / radio / radio-typhoon.c

/* Typhoon Radio Card driver for radio support
 * (c) 1999 Dr. Henrik Seidel <Henrik.Seidel@gmx.de>
 *
 * Card manufacturer:
 * http://194.18.155.92/idc/prod2.idc?nr=50753&lang=e
 *
 * Notes on the hardware
 *
 * This card has two output sockets, one for speakers and one for line.
 * The speaker output has volume control, but only in four discrete
 * steps. The line output has neither volume control nor mute.
 *
 * The card has auto-stereo according to its manual, although it all
 * sounds mono to me (even with the Win/DOS drivers). Maybe it's my
 * antenna - I really don't know for sure.
 *
 * Frequency control is done digitally.
 *
 * Volume control is done digitally, but there are only four different
 * possible values. So you should better always turn the volume up and
 * use line control. I got the best results by connecting line output
 * to the sound card microphone input. For such a configuration the
 * volume control has no effect, since volume control only influences
 * the speaker output.
 *
 * There is no explicit mute/unmute. So I set the radio frequency to a
 * value where I do expect just noise and turn the speaker volume down.
 * The frequency change is necessary since the card never seems to be
 * completely silent.
 *
 * 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/proc_fs.h>	/* radio card status report	  */
#include <linux/seq_file.h>
#include <asm/io.h>		/* outb, outb_p                   */
#include <asm/uaccess.h>	/* copy to/from user              */
#include <linux/videodev2.h>	/* kernel radio structs           */
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>

#include <linux/version.h>      /* for KERNEL_VERSION MACRO     */
#define RADIO_VERSION KERNEL_VERSION(0,1,1)
#define BANNER "Typhoon Radio Card driver v0.1.1\n"

static struct v4l2_queryctrl radio_qctrl[] = {
	{
		.id            = V4L2_CID_AUDIO_MUTE,
		.name          = "Mute",
		.minimum       = 0,
		.maximum       = 1,
		.default_value = 1,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
	},{
		.id            = V4L2_CID_AUDIO_VOLUME,
		.name          = "Volume",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 1<<14,
		.default_value = 0xff,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	}
};


#ifndef CONFIG_RADIO_TYPHOON_PORT
#define CONFIG_RADIO_TYPHOON_PORT -1
#endif

#ifndef CONFIG_RADIO_TYPHOON_MUTEFREQ
#define CONFIG_RADIO_TYPHOON_MUTEFREQ 0
#endif

#ifndef CONFIG_PROC_FS
#undef CONFIG_RADIO_TYPHOON_PROC_FS
#endif

struct typhoon_device {
	unsigned long in_use;
	int iobase;
	int curvol;
	int muted;
	unsigned long curfreq;
	unsigned long mutefreq;
	struct mutex lock;
};

static void typhoon_setvol_generic(struct typhoon_device *dev, int vol);
static int typhoon_setfreq_generic(struct typhoon_device *dev,
				   unsigned long frequency);
static int typhoon_setfreq(struct typhoon_device *dev, unsigned long frequency);
static void typhoon_mute(struct typhoon_device *dev);
static void typhoon_unmute(struct typhoon_device *dev);
static int typhoon_setvol(struct typhoon_device *dev, int vol);

static void typhoon_setvol_generic(struct typhoon_device *dev, int vol)
{
	mutex_lock(&dev->lock);
	vol >>= 14;				/* Map 16 bit to 2 bit */
	vol &= 3;
	outb_p(vol / 2, dev->iobase);		/* Set the volume, high bit. */
	outb_p(vol % 2, dev->iobase + 2);	/* Set the volume, low bit. */
	mutex_unlock(&dev->lock);
}

static int typhoon_setfreq_generic(struct typhoon_device *dev,
				   unsigned long frequency)
{
	unsigned long outval;
	unsigned long x;

	/*
	 * The frequency transfer curve is not linear. The best fit I could
	 * get is
	 *
	 * outval = -155 + exp((f + 15.55) * 0.057))
	 *
	 * where frequency f is in MHz. Since we don't have exp in the kernel,
	 * I approximate this function by a third order polynomial.
	 *
	 */

	mutex_lock(&dev->lock);
	x = frequency / 160;
	outval = (x * x + 2500) / 5000;
	outval = (outval * x + 5000) / 10000;
	outval -= (10 * x * x + 10433) / 20866;
	outval += 4 * x - 11505;

	outb_p((outval >> 8) & 0x01, dev->iobase + 4);
	outb_p(outval >> 9, dev->iobase + 6);
	outb_p(outval & 0xff, dev->iobase + 8);
	mutex_unlock(&dev->lock);

	return 0;
}

static int typhoon_setfreq(struct typhoon_device *dev, unsigned long frequency)
{
	typhoon_setfreq_generic(dev, frequency);
	dev->curfreq = frequency;
	return 0;
}

static void typhoon_mute(struct typhoon_device *dev)
{
	if (dev->muted == 1)
		return;
	typhoon_setvol_generic(dev, 0);
	typhoon_setfreq_generic(dev, dev->mutefreq);
	dev->muted = 1;
}

static void typhoon_unmute(struct typhoon_device *dev)
{
	if (dev->muted == 0)
		return;
	typhoon_setfreq_generic(dev, dev->curfreq);
	typhoon_setvol_generic(dev, dev->curvol);
	dev->muted = 0;
}

static int typhoon_setvol(struct typhoon_device *dev, int vol)
{
	if (dev->muted && vol != 0) {	/* user is unmuting the card */
		dev->curvol = vol;
		typhoon_unmute(dev);
		return 0;
	}
	if (vol == dev->curvol)		/* requested volume == current */
		return 0;

	if (vol == 0) {			/* volume == 0 means mute the card */
		typhoon_mute(dev);
		dev->curvol = vol;
		return 0;
	}
	typhoon_setvol_generic(dev, vol);
	dev->curvol = vol;
	return 0;
}

static int vidioc_querycap(struct file *file, void  *priv,
					struct v4l2_capability *v)
{
	strlcpy(v->driver, "radio-typhoon", sizeof(v->driver));
	strlcpy(v->card, "Typhoon Radio", sizeof(v->card));
	sprintf(v->bus_info, "ISA");
	v->version = RADIO_VERSION;
	v->capabilities = V4L2_CAP_TUNER;
	return 0;
}

static int vidioc_g_tuner(struct file *file, void *priv,
					struct v4l2_tuner *v)
{
	if (v->index > 0)
		return -EINVAL;

	strcpy(v->name, "FM");
	v->type = V4L2_TUNER_RADIO;
	v->rangelow = (87.5*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;     /* We can't get the signal strength */
	return 0;
}

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

	return 0;
}

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

	typhoon->curfreq = f->frequency;
	typhoon_setfreq(typhoon, typhoon->curfreq);
	return 0;
}

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

	f->type = V4L2_TUNER_RADIO;
	f->frequency = typhoon->curfreq;

	return 0;
}

static int vidioc_queryctrl(struct file *file, void *priv,
					struct v4l2_queryctrl *qc)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
		if (qc->id && qc->id == radio_qctrl[i].id) {
			memcpy(qc, &(radio_qctrl[i]),
						sizeof(*qc));
			return 0;
		}
	}
	return -EINVAL;
}

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

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		ctrl->value = typhoon->muted;
		return 0;
	case V4L2_CID_AUDIO_VOLUME:
		ctrl->value = typhoon->curvol;
		return 0;
	}
	return -EINVAL;
}

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

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		if (ctrl->value)
			typhoon_mute(typhoon);
		else
			typhoon_unmute(typhoon);
		return 0;
	case V4L2_CID_AUDIO_VOLUME:
		typhoon_setvol(typhoon, ctrl->value);
		return 0;
	}
	return -EINVAL;
}

static int vidioc_g_audio(struct file *file, void *priv,
					struct v4l2_audio *a)
{
	if (a->index > 1)
		return -EINVAL;

	strcpy(a->name, "Radio");
	a->capability = V4L2_AUDCAP_STEREO;
	return 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)
{
	if (i != 0)
		return -EINVAL;
	return 0;
}

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

static struct typhoon_device typhoon_unit =
{
	.iobase		= CONFIG_RADIO_TYPHOON_PORT,
	.curfreq	= CONFIG_RADIO_TYPHOON_MUTEFREQ,
	.mutefreq	= CONFIG_RADIO_TYPHOON_MUTEFREQ,
};

static int typhoon_exclusive_open(struct file *file)
{
	return test_and_set_bit(0, &typhoon_unit.in_use) ? -EBUSY : 0;
}

static int typhoon_exclusive_release(struct file *file)
{
	clear_bit(0, &typhoon_unit.in_use);
	return 0;
}

static const struct v4l2_file_operations typhoon_fops = {
	.owner		= THIS_MODULE,
	.open           = typhoon_exclusive_open,
	.release        = typhoon_exclusive_release,
	.ioctl		= video_ioctl2,
};

static const struct v4l2_ioctl_ops typhoon_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 struct video_device typhoon_radio = {
	.name		= "Typhoon Radio",
	.fops           = &typhoon_fops,
	.ioctl_ops 	= &typhoon_ioctl_ops,
	.release	= video_device_release_empty,
};

#ifdef CONFIG_RADIO_TYPHOON_PROC_FS

static int typhoon_proc_show(struct seq_file *m, void *v)
{
	#ifdef MODULE
	    #define MODULEPROCSTRING "Driver loaded as a module"
	#else
	    #define MODULEPROCSTRING "Driver compiled into kernel"
	#endif

	seq_puts(m, BANNER);
	seq_puts(m, "Load type: " MODULEPROCSTRING "\n\n");
	seq_printf(m, "frequency = %lu kHz\n",
		typhoon_unit.curfreq >> 4);
	seq_printf(m, "volume = %d\n", typhoon_unit.curvol);
	seq_printf(m, "mute = %s\n", typhoon_unit.muted ?
		"on" : "off");
	seq_printf(m, "iobase = 0x%x\n", typhoon_unit.iobase);
	seq_printf(m, "mute frequency = %lu kHz\n",
		typhoon_unit.mutefreq >> 4);
	return 0;
}

static int typhoon_proc_open(struct inode *inode, struct file *file)
{
	return single_open(file, typhoon_proc_show, NULL);
}

static const struct file_operations typhoon_proc_fops = {
	.owner		= THIS_MODULE,
	.open		= typhoon_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};
#endif /* CONFIG_RADIO_TYPHOON_PROC_FS */

MODULE_AUTHOR("Dr. Henrik Seidel");
MODULE_DESCRIPTION("A driver for the Typhoon radio card (a.k.a. EcoRadio).");
MODULE_LICENSE("GPL");

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

module_param(io, int, 0);
MODULE_PARM_DESC(io, "I/O address of the Typhoon card (0x316 or 0x336)");
module_param(radio_nr, int, 0);

#ifdef MODULE
static unsigned long mutefreq;
module_param(mutefreq, ulong, 0);
MODULE_PARM_DESC(mutefreq, "Frequency used when muting the card (in kHz)");
#endif

static int __init typhoon_init(void)
{
#ifdef MODULE
	if (io == -1) {
		printk(KERN_ERR "radio-typhoon: You must set an I/O address with io=0x316 or io=0x336\n");
		return -EINVAL;
	}
	typhoon_unit.iobase = io;

	if (mutefreq < 87000 || mutefreq > 108500) {
		printk(KERN_ERR "radio-typhoon: You must set a frequency (in kHz) used when muting the card,\n");
		printk(KERN_ERR "radio-typhoon: e.g. with \"mutefreq=87500\" (87000 <= mutefreq <= 108500)\n");
		return -EINVAL;
	}
	typhoon_unit.mutefreq = mutefreq;
#endif /* MODULE */

	printk(KERN_INFO BANNER);
	mutex_init(&typhoon_unit.lock);
	io = typhoon_unit.iobase;
	if (!request_region(io, 8, "typhoon")) {
		printk(KERN_ERR "radio-typhoon: port 0x%x already in use\n",
		       typhoon_unit.iobase);
		return -EBUSY;
	}

	video_set_drvdata(&typhoon_radio, &typhoon_unit);
	if (video_register_device(&typhoon_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
		release_region(io, 8);
		return -EINVAL;
	}
	printk(KERN_INFO "radio-typhoon: port 0x%x.\n", typhoon_unit.iobase);
	printk(KERN_INFO "radio-typhoon: mute frequency is %lu kHz.\n",
	       typhoon_unit.mutefreq);
	typhoon_unit.mutefreq <<= 4;

	/* mute card - prevents noisy bootups */
	typhoon_mute(&typhoon_unit);

#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
	if (!proc_create("driver/radio-typhoon", 0, NULL, &typhoon_proc_fops))
		printk(KERN_ERR "radio-typhoon: registering /proc/driver/radio-typhoon failed\n");
#endif

	return 0;
}

static void __exit typhoon_cleanup_module(void)
{

#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
	remove_proc_entry("driver/radio-typhoon", NULL);
#endif

	video_unregister_device(&typhoon_radio);
	release_region(io, 8);
}

module_init(typhoon_init);
module_exit(typhoon_cleanup_module);
Commit	Line	Data
1da177e4 LT	1	/* Typhoon Radio Card driver for radio support
	2	* (c) 1999 Dr. Henrik Seidel <Henrik.Seidel@gmx.de>
	3	*
	4	* Card manufacturer:
	5	* http://194.18.155.92/idc/prod2.idc?nr=50753&lang=e
	6	*
	7	* Notes on the hardware
	8	*
	9	* This card has two output sockets, one for speakers and one for line.
	10	* The speaker output has volume control, but only in four discrete
	11	* steps. The line output has neither volume control nor mute.
	12	*
	13	* The card has auto-stereo according to its manual, although it all
	14	* sounds mono to me (even with the Win/DOS drivers). Maybe it's my
	15	* antenna - I really don't know for sure.
	16	*
	17	* Frequency control is done digitally.
	18	*
	19	* Volume control is done digitally, but there are only four different
	20	* possible values. So you should better always turn the volume up and
	21	* use line control. I got the best results by connecting line output
	22	* to the sound card microphone input. For such a configuration the
	23	* volume control has no effect, since volume control only influences
	24	* the speaker output.
	25	*
	26	* There is no explicit mute/unmute. So I set the radio frequency to a
	27	* value where I do expect just noise and turn the speaker volume down.
	28	* The frequency change is necessary since the card never seems to be
	29	* completely silent.
30c48305 MCC	30	*
30c48305 MCC	31	* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
1da177e4 LT	32	*/
	33
	34	#include <linux/module.h> /* Modules */
	35	#include <linux/init.h> /* Initdata */
fb911ee8	36	#include <linux/ioport.h> /* request_region */
1da177e4	37	#include <linux/proc_fs.h> /* radio card status report */
0b9c2b7a	38	#include <linux/seq_file.h>
1da177e4 LT	39	#include <asm/io.h> /* outb, outb_p */
1da177e4 LT	40	#include <asm/uaccess.h> /* copy to/from user */
30c48305	41	#include <linux/videodev2.h> /* kernel radio structs */
5e87efa3	42	#include <media/v4l2-common.h>
35ea11ff	43	#include <media/v4l2-ioctl.h>
1da177e4	44
30c48305 MCC	45	#include <linux/version.h> /* for KERNEL_VERSION MACRO */
	46	#define RADIO_VERSION KERNEL_VERSION(0,1,1)
	47	#define BANNER "Typhoon Radio Card driver v0.1.1\n"
	48
	49	static struct v4l2_queryctrl radio_qctrl[] = {
	50	{
	51	.id = V4L2_CID_AUDIO_MUTE,
	52	.name = "Mute",
	53	.minimum = 0,
	54	.maximum = 1,
	55	.default_value = 1,
	56	.type = V4L2_CTRL_TYPE_BOOLEAN,
	57	},{
	58	.id = V4L2_CID_AUDIO_VOLUME,
	59	.name = "Volume",
	60	.minimum = 0,
	61	.maximum = 65535,
	62	.step = 1<<14,
	63	.default_value = 0xff,
	64	.type = V4L2_CTRL_TYPE_INTEGER,
	65	}
	66	};
	67
1da177e4 LT	68
	69	#ifndef CONFIG_RADIO_TYPHOON_PORT
	70	#define CONFIG_RADIO_TYPHOON_PORT -1
	71	#endif
	72
	73	#ifndef CONFIG_RADIO_TYPHOON_MUTEFREQ
	74	#define CONFIG_RADIO_TYPHOON_MUTEFREQ 0
	75	#endif
	76
	77	#ifndef CONFIG_PROC_FS
	78	#undef CONFIG_RADIO_TYPHOON_PROC_FS
	79	#endif
	80
	81	struct typhoon_device {
3ca685aa	82	unsigned long in_use;
1da177e4 LT	83	int iobase;
	84	int curvol;
	85	int muted;
	86	unsigned long curfreq;
	87	unsigned long mutefreq;
3593cab5	88	struct mutex lock;
1da177e4 LT	89	};
	90
	91	static void typhoon_setvol_generic(struct typhoon_device *dev, int vol);
	92	static int typhoon_setfreq_generic(struct typhoon_device *dev,
	93	unsigned long frequency);
	94	static int typhoon_setfreq(struct typhoon_device *dev, unsigned long frequency);
	95	static void typhoon_mute(struct typhoon_device *dev);
	96	static void typhoon_unmute(struct typhoon_device *dev);
	97	static int typhoon_setvol(struct typhoon_device *dev, int vol);
1da177e4 LT	98
	99	static void typhoon_setvol_generic(struct typhoon_device *dev, int vol)
	100	{
3593cab5	101	mutex_lock(&dev->lock);
1da177e4 LT	102	vol >>= 14; /* Map 16 bit to 2 bit */
	103	vol &= 3;
	104	outb_p(vol / 2, dev->iobase); /* Set the volume, high bit. */
	105	outb_p(vol % 2, dev->iobase + 2); /* Set the volume, low bit. */
3593cab5	106	mutex_unlock(&dev->lock);
1da177e4 LT	107	}
	108
	109	static int typhoon_setfreq_generic(struct typhoon_device *dev,
	110	unsigned long frequency)
	111	{
	112	unsigned long outval;
	113	unsigned long x;
	114
	115	/*
	116	* The frequency transfer curve is not linear. The best fit I could
	117	* get is
	118	*
	119	* outval = -155 + exp((f + 15.55) * 0.057))
	120	*
	121	* where frequency f is in MHz. Since we don't have exp in the kernel,
	122	* I approximate this function by a third order polynomial.
	123	*
	124	*/
	125
3593cab5	126	mutex_lock(&dev->lock);
1da177e4 LT	127	x = frequency / 160;
	128	outval = (x * x + 2500) / 5000;
	129	outval = (outval * x + 5000) / 10000;
	130	outval -= (10 * x * x + 10433) / 20866;
	131	outval += 4 * x - 11505;
	132
	133	outb_p((outval >> 8) & 0x01, dev->iobase + 4);
	134	outb_p(outval >> 9, dev->iobase + 6);
	135	outb_p(outval & 0xff, dev->iobase + 8);
3593cab5	136	mutex_unlock(&dev->lock);
1da177e4 LT	137
	138	return 0;
	139	}
	140
	141	static int typhoon_setfreq(struct typhoon_device *dev, unsigned long frequency)
	142	{
	143	typhoon_setfreq_generic(dev, frequency);
	144	dev->curfreq = frequency;
	145	return 0;
	146	}
	147
	148	static void typhoon_mute(struct typhoon_device *dev)
	149	{
	150	if (dev->muted == 1)
	151	return;
	152	typhoon_setvol_generic(dev, 0);
	153	typhoon_setfreq_generic(dev, dev->mutefreq);
	154	dev->muted = 1;
	155	}
	156
	157	static void typhoon_unmute(struct typhoon_device *dev)
	158	{
	159	if (dev->muted == 0)
	160	return;
	161	typhoon_setfreq_generic(dev, dev->curfreq);
	162	typhoon_setvol_generic(dev, dev->curvol);
	163	dev->muted = 0;
	164	}
	165
	166	static int typhoon_setvol(struct typhoon_device *dev, int vol)
	167	{
	168	if (dev->muted && vol != 0) { /* user is unmuting the card */
	169	dev->curvol = vol;
	170	typhoon_unmute(dev);
	171	return 0;
	172	}
	173	if (vol == dev->curvol) /* requested volume == current */
	174	return 0;
	175
	176	if (vol == 0) { /* volume == 0 means mute the card */
	177	typhoon_mute(dev);
	178	dev->curvol = vol;
	179	return 0;
	180	}
	181	typhoon_setvol_generic(dev, vol);
	182	dev->curvol = vol;
	183	return 0;
	184	}
	185
3f6892ac DL	186	static int vidioc_querycap(struct file file, void priv,
	187	struct v4l2_capability *v)
	188	{
	189	strlcpy(v->driver, "radio-typhoon", sizeof(v->driver));
	190	strlcpy(v->card, "Typhoon Radio", sizeof(v->card));
	191	sprintf(v->bus_info, "ISA");
	192	v->version = RADIO_VERSION;
	193	v->capabilities = V4L2_CAP_TUNER;
	194	return 0;
	195	}
	196
	197	static int vidioc_g_tuner(struct file file, void priv,
	198	struct v4l2_tuner *v)
	199	{
	200	if (v->index > 0)
	201	return -EINVAL;
	202
	203	strcpy(v->name, "FM");
	204	v->type = V4L2_TUNER_RADIO;
	205	v->rangelow = (87.5*16000);
	206	v->rangehigh = (108*16000);
	207	v->rxsubchans = V4L2_TUNER_SUB_MONO;
	208	v->capability = V4L2_TUNER_CAP_LOW;
	209	v->audmode = V4L2_TUNER_MODE_MONO;
	210	v->signal = 0xFFFF; /* We can't get the signal strength */
	211	return 0;
	212	}
1da177e4	213
3f6892ac DL	214	static int vidioc_s_tuner(struct file file, void priv,
	215	struct v4l2_tuner *v)
	216	{
	217	if (v->index > 0)
	218	return -EINVAL;
	219
	220	return 0;
	221	}
	222
	223	static int vidioc_s_frequency(struct file file, void priv,
	224	struct v4l2_frequency *f)
1da177e4	225	{
c170ecf4	226	struct typhoon_device *typhoon = video_drvdata(file);
1da177e4	227
3f6892ac DL	228	typhoon->curfreq = f->frequency;
	229	typhoon_setfreq(typhoon, typhoon->curfreq);
	230	return 0;
	231	}
30c48305	232
3f6892ac DL	233	static int vidioc_g_frequency(struct file file, void priv,
	234	struct v4l2_frequency *f)
	235	{
c170ecf4	236	struct typhoon_device *typhoon = video_drvdata(file);
30c48305	237
3f6892ac DL	238	f->type = V4L2_TUNER_RADIO;
3f6892ac DL	239	f->frequency = typhoon->curfreq;
30c48305	240
3f6892ac DL	241	return 0;
3f6892ac DL	242	}
30c48305	243
3f6892ac DL	244	static int vidioc_queryctrl(struct file file, void priv,
	245	struct v4l2_queryctrl *qc)
	246	{
	247	int i;
30c48305	248
3f6892ac DL	249	for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
	250	if (qc->id && qc->id == radio_qctrl[i].id) {
	251	memcpy(qc, &(radio_qctrl[i]),
	252	sizeof(*qc));
1da177e4 LT	253	return 0;
1da177e4 LT	254	}
3f6892ac DL	255	}
	256	return -EINVAL;
	257	}
30c48305	258
3f6892ac DL	259	static int vidioc_g_ctrl(struct file file, void priv,
	260	struct v4l2_control *ctrl)
	261	{
c170ecf4	262	struct typhoon_device *typhoon = video_drvdata(file);
30c48305	263
3f6892ac DL	264	switch (ctrl->id) {
	265	case V4L2_CID_AUDIO_MUTE:
	266	ctrl->value = typhoon->muted;
	267	return 0;
	268	case V4L2_CID_AUDIO_VOLUME:
	269	ctrl->value = typhoon->curvol;
	270	return 0;
	271	}
	272	return -EINVAL;
	273	}
30c48305	274
3f6892ac DL	275	static int vidioc_s_ctrl (struct file file, void priv,
	276	struct v4l2_control *ctrl)
	277	{
c170ecf4	278	struct typhoon_device *typhoon = video_drvdata(file);
30c48305	279
3f6892ac DL	280	switch (ctrl->id) {
	281	case V4L2_CID_AUDIO_MUTE:
	282	if (ctrl->value)
	283	typhoon_mute(typhoon);
	284	else
	285	typhoon_unmute(typhoon);
	286	return 0;
	287	case V4L2_CID_AUDIO_VOLUME:
	288	typhoon_setvol(typhoon, ctrl->value);
	289	return 0;
	290	}
	291	return -EINVAL;
	292	}
30c48305	293
3f6892ac DL	294	static int vidioc_g_audio(struct file file, void priv,
	295	struct v4l2_audio *a)
	296	{
	297	if (a->index > 1)
	298	return -EINVAL;
30c48305	299
3f6892ac DL	300	strcpy(a->name, "Radio");
	301	a->capability = V4L2_AUDCAP_STEREO;
	302	return 0;
	303	}
	304
	305	static int vidioc_g_input(struct file filp, void priv, unsigned int *i)
	306	{
	307	*i = 0;
	308	return 0;
1da177e4 LT	309	}
1da177e4 LT	310
3f6892ac	311	static int vidioc_s_input(struct file filp, void priv, unsigned int i)
1da177e4	312	{
3f6892ac DL	313	if (i != 0)
	314	return -EINVAL;
	315	return 0;
	316	}
	317
	318	static int vidioc_s_audio(struct file file, void priv,
	319	struct v4l2_audio *a)
	320	{
	321	if (a->index != 0)
	322	return -EINVAL;
	323	return 0;
1da177e4 LT	324	}
	325
	326	static struct typhoon_device typhoon_unit =
	327	{
	328	.iobase = CONFIG_RADIO_TYPHOON_PORT,
	329	.curfreq = CONFIG_RADIO_TYPHOON_MUTEFREQ,
	330	.mutefreq = CONFIG_RADIO_TYPHOON_MUTEFREQ,
	331	};
	332
bec43661	333	static int typhoon_exclusive_open(struct file *file)
3ca685aa HV	334	{
	335	return test_and_set_bit(0, &typhoon_unit.in_use) ? -EBUSY : 0;
	336	}
	337
bec43661	338	static int typhoon_exclusive_release(struct file *file)
3ca685aa HV	339	{
	340	clear_bit(0, &typhoon_unit.in_use);
	341	return 0;
	342	}
	343
bec43661	344	static const struct v4l2_file_operations typhoon_fops = {
1da177e4	345	.owner = THIS_MODULE,
3ca685aa HV	346	.open = typhoon_exclusive_open,
3ca685aa HV	347	.release = typhoon_exclusive_release,
3f6892ac	348	.ioctl = video_ioctl2,
1da177e4 LT	349	};
1da177e4 LT	350
a399810c	351	static const struct v4l2_ioctl_ops typhoon_ioctl_ops = {
3f6892ac DL	352	.vidioc_querycap = vidioc_querycap,
	353	.vidioc_g_tuner = vidioc_g_tuner,
	354	.vidioc_s_tuner = vidioc_s_tuner,
	355	.vidioc_g_audio = vidioc_g_audio,
	356	.vidioc_s_audio = vidioc_s_audio,
	357	.vidioc_g_input = vidioc_g_input,
	358	.vidioc_s_input = vidioc_s_input,
	359	.vidioc_g_frequency = vidioc_g_frequency,
	360	.vidioc_s_frequency = vidioc_s_frequency,
	361	.vidioc_queryctrl = vidioc_queryctrl,
	362	.vidioc_g_ctrl = vidioc_g_ctrl,
	363	.vidioc_s_ctrl = vidioc_s_ctrl,
1da177e4 LT	364	};
1da177e4 LT	365
a399810c	366	static struct video_device typhoon_radio = {
a399810c	367	.name = "Typhoon Radio",
a399810c HV	368	.fops = &typhoon_fops,
a399810c HV	369	.ioctl_ops = &typhoon_ioctl_ops,
aa5e90af	370	.release = video_device_release_empty,
a399810c HV	371	};
a399810c HV	372
1da177e4 LT	373	#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
1da177e4 LT	374
0b9c2b7a	375	static int typhoon_proc_show(struct seq_file m, void v)
1da177e4	376	{
1da177e4 LT	377	#ifdef MODULE
	378	#define MODULEPROCSTRING "Driver loaded as a module"
	379	#else
	380	#define MODULEPROCSTRING "Driver compiled into kernel"
	381	#endif
	382
0b9c2b7a AD	383	seq_puts(m, BANNER);
	384	seq_puts(m, "Load type: " MODULEPROCSTRING "\n\n");
	385	seq_printf(m, "frequency = %lu kHz\n",
1da177e4	386	typhoon_unit.curfreq >> 4);
0b9c2b7a AD	387	seq_printf(m, "volume = %d\n", typhoon_unit.curvol);
0b9c2b7a AD	388	seq_printf(m, "mute = %s\n", typhoon_unit.muted ?
1da177e4	389	"on" : "off");
0b9c2b7a AD	390	seq_printf(m, "iobase = 0x%x\n", typhoon_unit.iobase);
0b9c2b7a AD	391	seq_printf(m, "mute frequency = %lu kHz\n",
1da177e4	392	typhoon_unit.mutefreq >> 4);
0b9c2b7a	393	return 0;
1da177e4 LT	394	}
1da177e4 LT	395
0b9c2b7a AD	396	static int typhoon_proc_open(struct inode inode, struct file file)
	397	{
	398	return single_open(file, typhoon_proc_show, NULL);
	399	}
	400
	401	static const struct file_operations typhoon_proc_fops = {
	402	.owner = THIS_MODULE,
	403	.open = typhoon_proc_open,
	404	.read = seq_read,
	405	.llseek = seq_lseek,
	406	.release = single_release,
	407	};
1da177e4 LT	408	#endif /* CONFIG_RADIO_TYPHOON_PROC_FS */
	409
	410	MODULE_AUTHOR("Dr. Henrik Seidel");
	411	MODULE_DESCRIPTION("A driver for the Typhoon radio card (a.k.a. EcoRadio).");
	412	MODULE_LICENSE("GPL");
	413
	414	static int io = -1;
	415	static int radio_nr = -1;
	416
	417	module_param(io, int, 0);
	418	MODULE_PARM_DESC(io, "I/O address of the Typhoon card (0x316 or 0x336)");
	419	module_param(radio_nr, int, 0);
	420
	421	#ifdef MODULE
ff699e6b	422	static unsigned long mutefreq;
1da177e4 LT	423	module_param(mutefreq, ulong, 0);
	424	MODULE_PARM_DESC(mutefreq, "Frequency used when muting the card (in kHz)");
	425	#endif
	426
	427	static int __init typhoon_init(void)
	428	{
	429	#ifdef MODULE
	430	if (io == -1) {
	431	printk(KERN_ERR "radio-typhoon: You must set an I/O address with io=0x316 or io=0x336\n");
	432	return -EINVAL;
	433	}
	434	typhoon_unit.iobase = io;
	435
	436	if (mutefreq < 87000 \|\| mutefreq > 108500) {
	437	printk(KERN_ERR "radio-typhoon: You must set a frequency (in kHz) used when muting the card,\n");
	438	printk(KERN_ERR "radio-typhoon: e.g. with \"mutefreq=87500\" (87000 <= mutefreq <= 108500)\n");
	439	return -EINVAL;
	440	}
	441	typhoon_unit.mutefreq = mutefreq;
	442	#endif /* MODULE */
	443
	444	printk(KERN_INFO BANNER);
3593cab5	445	mutex_init(&typhoon_unit.lock);
1da177e4 LT	446	io = typhoon_unit.iobase;
	447	if (!request_region(io, 8, "typhoon")) {
	448	printk(KERN_ERR "radio-typhoon: port 0x%x already in use\n",
	449	typhoon_unit.iobase);
	450	return -EBUSY;
	451	}
	452
601e9444	453	video_set_drvdata(&typhoon_radio, &typhoon_unit);
3ca685aa	454	if (video_register_device(&typhoon_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
1da177e4 LT	455	release_region(io, 8);
	456	return -EINVAL;
	457	}
	458	printk(KERN_INFO "radio-typhoon: port 0x%x.\n", typhoon_unit.iobase);
	459	printk(KERN_INFO "radio-typhoon: mute frequency is %lu kHz.\n",
	460	typhoon_unit.mutefreq);
	461	typhoon_unit.mutefreq <<= 4;
	462
	463	/* mute card - prevents noisy bootups */
	464	typhoon_mute(&typhoon_unit);
	465
	466	#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
0b9c2b7a	467	if (!proc_create("driver/radio-typhoon", 0, NULL, &typhoon_proc_fops))
657de3cd	468	printk(KERN_ERR "radio-typhoon: registering /proc/driver/radio-typhoon failed\n");
1da177e4 LT	469	#endif
	470
	471	return 0;
	472	}
	473
	474	static void __exit typhoon_cleanup_module(void)
	475	{
	476
	477	#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
	478	remove_proc_entry("driver/radio-typhoon", NULL);
	479	#endif
	480
	481	video_unregister_device(&typhoon_radio);
	482	release_region(io, 8);
	483	}
	484
	485	module_init(typhoon_init);
	486	module_exit(typhoon_cleanup_module);
	487