[deliverable/linux.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 <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 <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 {
	int users;
	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);
#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
static int typhoon_get_info(char *buf, char **start, off_t offset, int len);
#endif

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 video_device *dev = video_devdata(file);
	struct typhoon_device *typhoon = dev->priv;

	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 video_device *dev = video_devdata(file);
	struct typhoon_device *typhoon = dev->priv;

	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 video_device *dev = video_devdata(file);
	struct typhoon_device *typhoon = dev->priv;

	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 video_device *dev = video_devdata(file);
	struct typhoon_device *typhoon = dev->priv;

	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 const struct file_operations typhoon_fops = {
	.owner		= THIS_MODULE,
	.open           = video_exclusive_open,
	.release        = video_exclusive_release,
	.ioctl		= video_ioctl2,
	.compat_ioctl	= v4l_compat_ioctl32,
	.llseek         = no_llseek,
};

static struct video_device typhoon_radio =
{
	.owner		= THIS_MODULE,
	.name		= "Typhoon Radio",
	.type		= VID_TYPE_TUNER,
	.fops           = &typhoon_fops,
	.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,
};

#ifdef CONFIG_RADIO_TYPHOON_PROC_FS

static int typhoon_get_info(char *buf, char **start, off_t offset, int len)
{
	char *out = buf;

	#ifdef MODULE
	    #define MODULEPROCSTRING "Driver loaded as a module"
	#else
	    #define MODULEPROCSTRING "Driver compiled into kernel"
	#endif

	/* output must be kept under PAGE_SIZE */
	out += sprintf(out, BANNER);
	out += sprintf(out, "Load type: " MODULEPROCSTRING "\n\n");
	out += sprintf(out, "frequency = %lu kHz\n",
		typhoon_unit.curfreq >> 4);
	out += sprintf(out, "volume = %d\n", typhoon_unit.curvol);
	out += sprintf(out, "mute = %s\n", typhoon_unit.muted ?
		"on" : "off");
	out += sprintf(out, "iobase = 0x%x\n", typhoon_unit.iobase);
	out += sprintf(out, "mute frequency = %lu kHz\n",
		typhoon_unit.mutefreq >> 4);
	return out - buf;
}

#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 = 0;
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;
	}

	typhoon_radio.priv = &typhoon_unit;
	if (video_register_device(&typhoon_radio, VFL_TYPE_RADIO, radio_nr) == -1)
	{
		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 (!create_proc_info_entry("driver/radio-typhoon", 0, NULL,
				    typhoon_get_info))
		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 LT	37	#include <linux/proc_fs.h> /* radio card status report */
	38	#include <asm/io.h> /* outb, outb_p */
	39	#include <asm/uaccess.h> /* copy to/from user */
30c48305	40	#include <linux/videodev2.h> /* kernel radio structs */
5e87efa3	41	#include <media/v4l2-common.h>
1da177e4	42
30c48305 MCC	43	#include <linux/version.h> /* for KERNEL_VERSION MACRO */
	44	#define RADIO_VERSION KERNEL_VERSION(0,1,1)
	45	#define BANNER "Typhoon Radio Card driver v0.1.1\n"
	46
	47	static struct v4l2_queryctrl radio_qctrl[] = {
	48	{
	49	.id = V4L2_CID_AUDIO_MUTE,
	50	.name = "Mute",
	51	.minimum = 0,
	52	.maximum = 1,
	53	.default_value = 1,
	54	.type = V4L2_CTRL_TYPE_BOOLEAN,
	55	},{
	56	.id = V4L2_CID_AUDIO_VOLUME,
	57	.name = "Volume",
	58	.minimum = 0,
	59	.maximum = 65535,
	60	.step = 1<<14,
	61	.default_value = 0xff,
	62	.type = V4L2_CTRL_TYPE_INTEGER,
	63	}
	64	};
	65
1da177e4 LT	66
	67	#ifndef CONFIG_RADIO_TYPHOON_PORT
	68	#define CONFIG_RADIO_TYPHOON_PORT -1
	69	#endif
	70
	71	#ifndef CONFIG_RADIO_TYPHOON_MUTEFREQ
	72	#define CONFIG_RADIO_TYPHOON_MUTEFREQ 0
	73	#endif
	74
	75	#ifndef CONFIG_PROC_FS
	76	#undef CONFIG_RADIO_TYPHOON_PROC_FS
	77	#endif
	78
	79	struct typhoon_device {
	80	int users;
	81	int iobase;
	82	int curvol;
	83	int muted;
	84	unsigned long curfreq;
	85	unsigned long mutefreq;
3593cab5	86	struct mutex lock;
1da177e4 LT	87	};
	88
	89	static void typhoon_setvol_generic(struct typhoon_device *dev, int vol);
	90	static int typhoon_setfreq_generic(struct typhoon_device *dev,
	91	unsigned long frequency);
	92	static int typhoon_setfreq(struct typhoon_device *dev, unsigned long frequency);
	93	static void typhoon_mute(struct typhoon_device *dev);
	94	static void typhoon_unmute(struct typhoon_device *dev);
	95	static int typhoon_setvol(struct typhoon_device *dev, int vol);
1da177e4 LT	96	#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
	97	static int typhoon_get_info(char buf, char *start, off_t offset, int len);
	98	#endif
	99
	100	static void typhoon_setvol_generic(struct typhoon_device *dev, int vol)
	101	{
3593cab5	102	mutex_lock(&dev->lock);
1da177e4 LT	103	vol >>= 14; /* Map 16 bit to 2 bit */
	104	vol &= 3;
	105	outb_p(vol / 2, dev->iobase); /* Set the volume, high bit. */
	106	outb_p(vol % 2, dev->iobase + 2); /* Set the volume, low bit. */
3593cab5	107	mutex_unlock(&dev->lock);
1da177e4 LT	108	}
	109
	110	static int typhoon_setfreq_generic(struct typhoon_device *dev,
	111	unsigned long frequency)
	112	{
	113	unsigned long outval;
	114	unsigned long x;
	115
	116	/*
	117	* The frequency transfer curve is not linear. The best fit I could
	118	* get is
	119	*
	120	* outval = -155 + exp((f + 15.55) * 0.057))
	121	*
	122	* where frequency f is in MHz. Since we don't have exp in the kernel,
	123	* I approximate this function by a third order polynomial.
	124	*
	125	*/
	126
3593cab5	127	mutex_lock(&dev->lock);
1da177e4 LT	128	x = frequency / 160;
	129	outval = (x * x + 2500) / 5000;
	130	outval = (outval * x + 5000) / 10000;
	131	outval -= (10 * x * x + 10433) / 20866;
	132	outval += 4 * x - 11505;
	133
	134	outb_p((outval >> 8) & 0x01, dev->iobase + 4);
	135	outb_p(outval >> 9, dev->iobase + 6);
	136	outb_p(outval & 0xff, dev->iobase + 8);
3593cab5	137	mutex_unlock(&dev->lock);
1da177e4 LT	138
	139	return 0;
	140	}
	141
	142	static int typhoon_setfreq(struct typhoon_device *dev, unsigned long frequency)
	143	{
	144	typhoon_setfreq_generic(dev, frequency);
	145	dev->curfreq = frequency;
	146	return 0;
	147	}
	148
	149	static void typhoon_mute(struct typhoon_device *dev)
	150	{
	151	if (dev->muted == 1)
	152	return;
	153	typhoon_setvol_generic(dev, 0);
	154	typhoon_setfreq_generic(dev, dev->mutefreq);
	155	dev->muted = 1;
	156	}
	157
	158	static void typhoon_unmute(struct typhoon_device *dev)
	159	{
	160	if (dev->muted == 0)
	161	return;
	162	typhoon_setfreq_generic(dev, dev->curfreq);
	163	typhoon_setvol_generic(dev, dev->curvol);
	164	dev->muted = 0;
	165	}
	166
	167	static int typhoon_setvol(struct typhoon_device *dev, int vol)
	168	{
	169	if (dev->muted && vol != 0) { /* user is unmuting the card */
	170	dev->curvol = vol;
	171	typhoon_unmute(dev);
	172	return 0;
	173	}
	174	if (vol == dev->curvol) /* requested volume == current */
	175	return 0;
	176
	177	if (vol == 0) { /* volume == 0 means mute the card */
	178	typhoon_mute(dev);
	179	dev->curvol = vol;
	180	return 0;
	181	}
	182	typhoon_setvol_generic(dev, vol);
	183	dev->curvol = vol;
	184	return 0;
	185	}
	186
3f6892ac DL	187	static int vidioc_querycap(struct file file, void priv,
	188	struct v4l2_capability *v)
	189	{
	190	strlcpy(v->driver, "radio-typhoon", sizeof(v->driver));
	191	strlcpy(v->card, "Typhoon Radio", sizeof(v->card));
	192	sprintf(v->bus_info, "ISA");
	193	v->version = RADIO_VERSION;
	194	v->capabilities = V4L2_CAP_TUNER;
	195	return 0;
	196	}
	197
	198	static int vidioc_g_tuner(struct file file, void priv,
	199	struct v4l2_tuner *v)
	200	{
	201	if (v->index > 0)
	202	return -EINVAL;
	203
	204	strcpy(v->name, "FM");
	205	v->type = V4L2_TUNER_RADIO;
	206	v->rangelow = (87.5*16000);
	207	v->rangehigh = (108*16000);
	208	v->rxsubchans = V4L2_TUNER_SUB_MONO;
	209	v->capability = V4L2_TUNER_CAP_LOW;
	210	v->audmode = V4L2_TUNER_MODE_MONO;
	211	v->signal = 0xFFFF; /* We can't get the signal strength */
	212	return 0;
	213	}
1da177e4	214
3f6892ac DL	215	static int vidioc_s_tuner(struct file file, void priv,
	216	struct v4l2_tuner *v)
	217	{
	218	if (v->index > 0)
	219	return -EINVAL;
	220
	221	return 0;
	222	}
	223
	224	static int vidioc_s_frequency(struct file file, void priv,
	225	struct v4l2_frequency *f)
1da177e4 LT	226	{
	227	struct video_device *dev = video_devdata(file);
	228	struct typhoon_device *typhoon = dev->priv;
	229
3f6892ac DL	230	typhoon->curfreq = f->frequency;
	231	typhoon_setfreq(typhoon, typhoon->curfreq);
	232	return 0;
	233	}
30c48305	234
3f6892ac DL	235	static int vidioc_g_frequency(struct file file, void priv,
	236	struct v4l2_frequency *f)
	237	{
	238	struct video_device *dev = video_devdata(file);
	239	struct typhoon_device *typhoon = dev->priv;
30c48305	240
3f6892ac DL	241	f->type = V4L2_TUNER_RADIO;
3f6892ac DL	242	f->frequency = typhoon->curfreq;
30c48305	243
3f6892ac DL	244	return 0;
3f6892ac DL	245	}
30c48305	246
3f6892ac DL	247	static int vidioc_queryctrl(struct file file, void priv,
	248	struct v4l2_queryctrl *qc)
	249	{
	250	int i;
30c48305	251
3f6892ac DL	252	for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
	253	if (qc->id && qc->id == radio_qctrl[i].id) {
	254	memcpy(qc, &(radio_qctrl[i]),
	255	sizeof(*qc));
1da177e4 LT	256	return 0;
1da177e4 LT	257	}
3f6892ac DL	258	}
	259	return -EINVAL;
	260	}
30c48305	261
3f6892ac DL	262	static int vidioc_g_ctrl(struct file file, void priv,
	263	struct v4l2_control *ctrl)
	264	{
	265	struct video_device *dev = video_devdata(file);
	266	struct typhoon_device *typhoon = dev->priv;
30c48305	267
3f6892ac DL	268	switch (ctrl->id) {
	269	case V4L2_CID_AUDIO_MUTE:
	270	ctrl->value = typhoon->muted;
	271	return 0;
	272	case V4L2_CID_AUDIO_VOLUME:
	273	ctrl->value = typhoon->curvol;
	274	return 0;
	275	}
	276	return -EINVAL;
	277	}
30c48305	278
3f6892ac DL	279	static int vidioc_s_ctrl (struct file file, void priv,
	280	struct v4l2_control *ctrl)
	281	{
	282	struct video_device *dev = video_devdata(file);
	283	struct typhoon_device *typhoon = dev->priv;
30c48305	284
3f6892ac DL	285	switch (ctrl->id) {
	286	case V4L2_CID_AUDIO_MUTE:
	287	if (ctrl->value)
	288	typhoon_mute(typhoon);
	289	else
	290	typhoon_unmute(typhoon);
	291	return 0;
	292	case V4L2_CID_AUDIO_VOLUME:
	293	typhoon_setvol(typhoon, ctrl->value);
	294	return 0;
	295	}
	296	return -EINVAL;
	297	}
30c48305	298
3f6892ac DL	299	static int vidioc_g_audio(struct file file, void priv,
	300	struct v4l2_audio *a)
	301	{
	302	if (a->index > 1)
	303	return -EINVAL;
30c48305	304
3f6892ac DL	305	strcpy(a->name, "Radio");
	306	a->capability = V4L2_AUDCAP_STEREO;
	307	return 0;
	308	}
	309
	310	static int vidioc_g_input(struct file filp, void priv, unsigned int *i)
	311	{
	312	*i = 0;
	313	return 0;
1da177e4 LT	314	}
1da177e4 LT	315
3f6892ac	316	static int vidioc_s_input(struct file filp, void priv, unsigned int i)
1da177e4	317	{
3f6892ac DL	318	if (i != 0)
	319	return -EINVAL;
	320	return 0;
	321	}
	322
	323	static int vidioc_s_audio(struct file file, void priv,
	324	struct v4l2_audio *a)
	325	{
	326	if (a->index != 0)
	327	return -EINVAL;
	328	return 0;
1da177e4 LT	329	}
	330
	331	static struct typhoon_device typhoon_unit =
	332	{
	333	.iobase = CONFIG_RADIO_TYPHOON_PORT,
	334	.curfreq = CONFIG_RADIO_TYPHOON_MUTEFREQ,
	335	.mutefreq = CONFIG_RADIO_TYPHOON_MUTEFREQ,
	336	};
	337
fa027c2a	338	static const struct file_operations typhoon_fops = {
1da177e4 LT	339	.owner = THIS_MODULE,
	340	.open = video_exclusive_open,
	341	.release = video_exclusive_release,
3f6892ac	342	.ioctl = video_ioctl2,
0d0fbf81	343	.compat_ioctl = v4l_compat_ioctl32,
1da177e4 LT	344	.llseek = no_llseek,
	345	};
	346
	347	static struct video_device typhoon_radio =
	348	{
	349	.owner = THIS_MODULE,
	350	.name = "Typhoon Radio",
	351	.type = VID_TYPE_TUNER,
1da177e4	352	.fops = &typhoon_fops,
3f6892ac DL	353	.vidioc_querycap = vidioc_querycap,
	354	.vidioc_g_tuner = vidioc_g_tuner,
	355	.vidioc_s_tuner = vidioc_s_tuner,
	356	.vidioc_g_audio = vidioc_g_audio,
	357	.vidioc_s_audio = vidioc_s_audio,
	358	.vidioc_g_input = vidioc_g_input,
	359	.vidioc_s_input = vidioc_s_input,
	360	.vidioc_g_frequency = vidioc_g_frequency,
	361	.vidioc_s_frequency = vidioc_s_frequency,
	362	.vidioc_queryctrl = vidioc_queryctrl,
	363	.vidioc_g_ctrl = vidioc_g_ctrl,
	364	.vidioc_s_ctrl = vidioc_s_ctrl,
1da177e4 LT	365	};
	366
	367	#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
	368
	369	static int typhoon_get_info(char buf, char *start, off_t offset, int len)
	370	{
	371	char *out = buf;
	372
	373	#ifdef MODULE
	374	#define MODULEPROCSTRING "Driver loaded as a module"
	375	#else
	376	#define MODULEPROCSTRING "Driver compiled into kernel"
	377	#endif
	378
	379	/* output must be kept under PAGE_SIZE */
	380	out += sprintf(out, BANNER);
	381	out += sprintf(out, "Load type: " MODULEPROCSTRING "\n\n");
	382	out += sprintf(out, "frequency = %lu kHz\n",
	383	typhoon_unit.curfreq >> 4);
	384	out += sprintf(out, "volume = %d\n", typhoon_unit.curvol);
	385	out += sprintf(out, "mute = %s\n", typhoon_unit.muted ?
	386	"on" : "off");
	387	out += sprintf(out, "iobase = 0x%x\n", typhoon_unit.iobase);
	388	out += sprintf(out, "mute frequency = %lu kHz\n",
	389	typhoon_unit.mutefreq >> 4);
	390	return out - buf;
	391	}
	392
	393	#endif /* CONFIG_RADIO_TYPHOON_PROC_FS */
	394
	395	MODULE_AUTHOR("Dr. Henrik Seidel");
	396	MODULE_DESCRIPTION("A driver for the Typhoon radio card (a.k.a. EcoRadio).");
	397	MODULE_LICENSE("GPL");
	398
	399	static int io = -1;
	400	static int radio_nr = -1;
	401
	402	module_param(io, int, 0);
	403	MODULE_PARM_DESC(io, "I/O address of the Typhoon card (0x316 or 0x336)");
	404	module_param(radio_nr, int, 0);
	405
	406	#ifdef MODULE
	407	static unsigned long mutefreq = 0;
	408	module_param(mutefreq, ulong, 0);
	409	MODULE_PARM_DESC(mutefreq, "Frequency used when muting the card (in kHz)");
	410	#endif
	411
	412	static int __init typhoon_init(void)
	413	{
	414	#ifdef MODULE
	415	if (io == -1) {
	416	printk(KERN_ERR "radio-typhoon: You must set an I/O address with io=0x316 or io=0x336\n");
	417	return -EINVAL;
	418	}
	419	typhoon_unit.iobase = io;
	420
	421	if (mutefreq < 87000 \|\| mutefreq > 108500) {
	422	printk(KERN_ERR "radio-typhoon: You must set a frequency (in kHz) used when muting the card,\n");
	423	printk(KERN_ERR "radio-typhoon: e.g. with \"mutefreq=87500\" (87000 <= mutefreq <= 108500)\n");
	424	return -EINVAL;
	425	}
	426	typhoon_unit.mutefreq = mutefreq;
	427	#endif /* MODULE */
	428
429	printk(KERN_INFO BANNER);
3593cab5	430	mutex_init(&typhoon_unit.lock);
1da177e4 LT	431	io = typhoon_unit.iobase;
	432	if (!request_region(io, 8, "typhoon")) {
	433	printk(KERN_ERR "radio-typhoon: port 0x%x already in use\n",
	434	typhoon_unit.iobase);
	435	return -EBUSY;
	436	}
	437
	438	typhoon_radio.priv = &typhoon_unit;
	439	if (video_register_device(&typhoon_radio, VFL_TYPE_RADIO, radio_nr) == -1)
	440	{
	441	release_region(io, 8);
	442	return -EINVAL;
	443	}
	444	printk(KERN_INFO "radio-typhoon: port 0x%x.\n", typhoon_unit.iobase);
	445	printk(KERN_INFO "radio-typhoon: mute frequency is %lu kHz.\n",
	446	typhoon_unit.mutefreq);
	447	typhoon_unit.mutefreq <<= 4;
	448
	449	/* mute card - prevents noisy bootups */
	450	typhoon_mute(&typhoon_unit);
	451
	452	#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
	453	if (!create_proc_info_entry("driver/radio-typhoon", 0, NULL,
4286c6f6	454	typhoon_get_info))
657de3cd	455	printk(KERN_ERR "radio-typhoon: registering /proc/driver/radio-typhoon failed\n");
1da177e4 LT	456	#endif
	457
	458	return 0;
	459	}
	460
	461	static void __exit typhoon_cleanup_module(void)
	462	{
	463
	464	#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
	465	remove_proc_entry("driver/radio-typhoon", NULL);
	466	#endif
	467
	468	video_unregister_device(&typhoon_radio);
	469	release_region(io, 8);
	470	}
	471
	472	module_init(typhoon_init);
	473	module_exit(typhoon_cleanup_module);
	474