[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 <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);

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,
#ifdef CONFIG_COMPAT
	.compat_ioctl	= v4l_compat_ioctl32,
#endif
	.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_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;
	}

	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 (!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>
1da177e4	43
30c48305 MCC	44	#include <linux/version.h> /* for KERNEL_VERSION MACRO */
	45	#define RADIO_VERSION KERNEL_VERSION(0,1,1)
	46	#define BANNER "Typhoon Radio Card driver v0.1.1\n"
	47
	48	static struct v4l2_queryctrl radio_qctrl[] = {
	49	{
	50	.id = V4L2_CID_AUDIO_MUTE,
	51	.name = "Mute",
	52	.minimum = 0,
	53	.maximum = 1,
	54	.default_value = 1,
	55	.type = V4L2_CTRL_TYPE_BOOLEAN,
	56	},{
	57	.id = V4L2_CID_AUDIO_VOLUME,
	58	.name = "Volume",
	59	.minimum = 0,
	60	.maximum = 65535,
	61	.step = 1<<14,
	62	.default_value = 0xff,
	63	.type = V4L2_CTRL_TYPE_INTEGER,
	64	}
	65	};
	66
1da177e4 LT	67
	68	#ifndef CONFIG_RADIO_TYPHOON_PORT
	69	#define CONFIG_RADIO_TYPHOON_PORT -1
	70	#endif
	71
	72	#ifndef CONFIG_RADIO_TYPHOON_MUTEFREQ
	73	#define CONFIG_RADIO_TYPHOON_MUTEFREQ 0
	74	#endif
	75
	76	#ifndef CONFIG_PROC_FS
	77	#undef CONFIG_RADIO_TYPHOON_PROC_FS
	78	#endif
	79
	80	struct typhoon_device {
	81	int users;
	82	int iobase;
	83	int curvol;
	84	int muted;
	85	unsigned long curfreq;
	86	unsigned long mutefreq;
3593cab5	87	struct mutex lock;
1da177e4 LT	88	};
	89
	90	static void typhoon_setvol_generic(struct typhoon_device *dev, int vol);
	91	static int typhoon_setfreq_generic(struct typhoon_device *dev,
	92	unsigned long frequency);
	93	static int typhoon_setfreq(struct typhoon_device *dev, unsigned long frequency);
	94	static void typhoon_mute(struct typhoon_device *dev);
	95	static void typhoon_unmute(struct typhoon_device *dev);
	96	static int typhoon_setvol(struct typhoon_device *dev, int vol);
1da177e4 LT	97
	98	static void typhoon_setvol_generic(struct typhoon_device *dev, int vol)
	99	{
3593cab5	100	mutex_lock(&dev->lock);
1da177e4 LT	101	vol >>= 14; /* Map 16 bit to 2 bit */
	102	vol &= 3;
	103	outb_p(vol / 2, dev->iobase); /* Set the volume, high bit. */
	104	outb_p(vol % 2, dev->iobase + 2); /* Set the volume, low bit. */
3593cab5	105	mutex_unlock(&dev->lock);
1da177e4 LT	106	}
	107
	108	static int typhoon_setfreq_generic(struct typhoon_device *dev,
	109	unsigned long frequency)
	110	{
	111	unsigned long outval;
	112	unsigned long x;
	113
	114	/*
	115	* The frequency transfer curve is not linear. The best fit I could
	116	* get is
	117	*
	118	* outval = -155 + exp((f + 15.55) * 0.057))
	119	*
	120	* where frequency f is in MHz. Since we don't have exp in the kernel,
	121	* I approximate this function by a third order polynomial.
	122	*
	123	*/
	124
3593cab5	125	mutex_lock(&dev->lock);
1da177e4 LT	126	x = frequency / 160;
	127	outval = (x * x + 2500) / 5000;
	128	outval = (outval * x + 5000) / 10000;
	129	outval -= (10 * x * x + 10433) / 20866;
	130	outval += 4 * x - 11505;
	131
	132	outb_p((outval >> 8) & 0x01, dev->iobase + 4);
	133	outb_p(outval >> 9, dev->iobase + 6);
	134	outb_p(outval & 0xff, dev->iobase + 8);
3593cab5	135	mutex_unlock(&dev->lock);
1da177e4 LT	136
	137	return 0;
	138	}
	139
	140	static int typhoon_setfreq(struct typhoon_device *dev, unsigned long frequency)
	141	{
	142	typhoon_setfreq_generic(dev, frequency);
	143	dev->curfreq = frequency;
	144	return 0;
	145	}
	146
	147	static void typhoon_mute(struct typhoon_device *dev)
	148	{
	149	if (dev->muted == 1)
	150	return;
	151	typhoon_setvol_generic(dev, 0);
	152	typhoon_setfreq_generic(dev, dev->mutefreq);
	153	dev->muted = 1;
	154	}
	155
	156	static void typhoon_unmute(struct typhoon_device *dev)
	157	{
	158	if (dev->muted == 0)
	159	return;
	160	typhoon_setfreq_generic(dev, dev->curfreq);
	161	typhoon_setvol_generic(dev, dev->curvol);
	162	dev->muted = 0;
	163	}
	164
	165	static int typhoon_setvol(struct typhoon_device *dev, int vol)
	166	{
	167	if (dev->muted && vol != 0) { /* user is unmuting the card */
	168	dev->curvol = vol;
	169	typhoon_unmute(dev);
	170	return 0;
	171	}
	172	if (vol == dev->curvol) /* requested volume == current */
	173	return 0;
	174
	175	if (vol == 0) { /* volume == 0 means mute the card */
	176	typhoon_mute(dev);
	177	dev->curvol = vol;
	178	return 0;
	179	}
	180	typhoon_setvol_generic(dev, vol);
	181	dev->curvol = vol;
	182	return 0;
	183	}
	184
3f6892ac DL	185	static int vidioc_querycap(struct file file, void priv,
	186	struct v4l2_capability *v)
	187	{
	188	strlcpy(v->driver, "radio-typhoon", sizeof(v->driver));
	189	strlcpy(v->card, "Typhoon Radio", sizeof(v->card));
	190	sprintf(v->bus_info, "ISA");
	191	v->version = RADIO_VERSION;
	192	v->capabilities = V4L2_CAP_TUNER;
	193	return 0;
	194	}
	195
	196	static int vidioc_g_tuner(struct file file, void priv,
	197	struct v4l2_tuner *v)
	198	{
	199	if (v->index > 0)
	200	return -EINVAL;
	201
	202	strcpy(v->name, "FM");
	203	v->type = V4L2_TUNER_RADIO;
	204	v->rangelow = (87.5*16000);
	205	v->rangehigh = (108*16000);
	206	v->rxsubchans = V4L2_TUNER_SUB_MONO;
	207	v->capability = V4L2_TUNER_CAP_LOW;
	208	v->audmode = V4L2_TUNER_MODE_MONO;
	209	v->signal = 0xFFFF; /* We can't get the signal strength */
	210	return 0;
	211	}
1da177e4	212
3f6892ac DL	213	static int vidioc_s_tuner(struct file file, void priv,
	214	struct v4l2_tuner *v)
	215	{
	216	if (v->index > 0)
	217	return -EINVAL;
	218
	219	return 0;
	220	}
	221
	222	static int vidioc_s_frequency(struct file file, void priv,
	223	struct v4l2_frequency *f)
1da177e4 LT	224	{
	225	struct video_device *dev = video_devdata(file);
	226	struct typhoon_device *typhoon = dev->priv;
	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	{
	236	struct video_device *dev = video_devdata(file);
	237	struct typhoon_device *typhoon = dev->priv;
30c48305	238
3f6892ac DL	239	f->type = V4L2_TUNER_RADIO;
3f6892ac DL	240	f->frequency = typhoon->curfreq;
30c48305	241
3f6892ac DL	242	return 0;
3f6892ac DL	243	}
30c48305	244
3f6892ac DL	245	static int vidioc_queryctrl(struct file file, void priv,
	246	struct v4l2_queryctrl *qc)
	247	{
	248	int i;
30c48305	249
3f6892ac DL	250	for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
	251	if (qc->id && qc->id == radio_qctrl[i].id) {
	252	memcpy(qc, &(radio_qctrl[i]),
	253	sizeof(*qc));
1da177e4 LT	254	return 0;
1da177e4 LT	255	}
3f6892ac DL	256	}
	257	return -EINVAL;
	258	}
30c48305	259
3f6892ac DL	260	static int vidioc_g_ctrl(struct file file, void priv,
	261	struct v4l2_control *ctrl)
	262	{
	263	struct video_device *dev = video_devdata(file);
	264	struct typhoon_device *typhoon = dev->priv;
30c48305	265
3f6892ac DL	266	switch (ctrl->id) {
	267	case V4L2_CID_AUDIO_MUTE:
	268	ctrl->value = typhoon->muted;
	269	return 0;
	270	case V4L2_CID_AUDIO_VOLUME:
	271	ctrl->value = typhoon->curvol;
	272	return 0;
	273	}
	274	return -EINVAL;
	275	}
30c48305	276
3f6892ac DL	277	static int vidioc_s_ctrl (struct file file, void priv,
	278	struct v4l2_control *ctrl)
	279	{
	280	struct video_device *dev = video_devdata(file);
	281	struct typhoon_device *typhoon = dev->priv;
30c48305	282
3f6892ac DL	283	switch (ctrl->id) {
	284	case V4L2_CID_AUDIO_MUTE:
	285	if (ctrl->value)
	286	typhoon_mute(typhoon);
	287	else
	288	typhoon_unmute(typhoon);
	289	return 0;
	290	case V4L2_CID_AUDIO_VOLUME:
	291	typhoon_setvol(typhoon, ctrl->value);
	292	return 0;
	293	}
	294	return -EINVAL;
	295	}
30c48305	296
3f6892ac DL	297	static int vidioc_g_audio(struct file file, void priv,
	298	struct v4l2_audio *a)
	299	{
	300	if (a->index > 1)
	301	return -EINVAL;
30c48305	302
3f6892ac DL	303	strcpy(a->name, "Radio");
	304	a->capability = V4L2_AUDCAP_STEREO;
	305	return 0;
	306	}
	307
	308	static int vidioc_g_input(struct file filp, void priv, unsigned int *i)
	309	{
	310	*i = 0;
	311	return 0;
1da177e4 LT	312	}
1da177e4 LT	313
3f6892ac	314	static int vidioc_s_input(struct file filp, void priv, unsigned int i)
1da177e4	315	{
3f6892ac DL	316	if (i != 0)
	317	return -EINVAL;
	318	return 0;
	319	}
	320
	321	static int vidioc_s_audio(struct file file, void priv,
	322	struct v4l2_audio *a)
	323	{
	324	if (a->index != 0)
	325	return -EINVAL;
	326	return 0;
1da177e4 LT	327	}
	328
	329	static struct typhoon_device typhoon_unit =
	330	{
	331	.iobase = CONFIG_RADIO_TYPHOON_PORT,
	332	.curfreq = CONFIG_RADIO_TYPHOON_MUTEFREQ,
	333	.mutefreq = CONFIG_RADIO_TYPHOON_MUTEFREQ,
	334	};
	335
fa027c2a	336	static const struct file_operations typhoon_fops = {
1da177e4 LT	337	.owner = THIS_MODULE,
	338	.open = video_exclusive_open,
	339	.release = video_exclusive_release,
3f6892ac	340	.ioctl = video_ioctl2,
078ff795	341	#ifdef CONFIG_COMPAT
0d0fbf81	342	.compat_ioctl = v4l_compat_ioctl32,
078ff795	343	#endif
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
0b9c2b7a	369	static int typhoon_proc_show(struct seq_file m, void v)
1da177e4	370	{
1da177e4 LT	371	#ifdef MODULE
	372	#define MODULEPROCSTRING "Driver loaded as a module"
	373	#else
	374	#define MODULEPROCSTRING "Driver compiled into kernel"
	375	#endif
	376
0b9c2b7a AD	377	seq_puts(m, BANNER);
	378	seq_puts(m, "Load type: " MODULEPROCSTRING "\n\n");
	379	seq_printf(m, "frequency = %lu kHz\n",
1da177e4	380	typhoon_unit.curfreq >> 4);
0b9c2b7a AD	381	seq_printf(m, "volume = %d\n", typhoon_unit.curvol);
0b9c2b7a AD	382	seq_printf(m, "mute = %s\n", typhoon_unit.muted ?
1da177e4	383	"on" : "off");
0b9c2b7a AD	384	seq_printf(m, "iobase = 0x%x\n", typhoon_unit.iobase);
0b9c2b7a AD	385	seq_printf(m, "mute frequency = %lu kHz\n",
1da177e4	386	typhoon_unit.mutefreq >> 4);
0b9c2b7a	387	return 0;
1da177e4 LT	388	}
1da177e4 LT	389
0b9c2b7a AD	390	static int typhoon_proc_open(struct inode inode, struct file file)
	391	{
	392	return single_open(file, typhoon_proc_show, NULL);
	393	}
	394
	395	static const struct file_operations typhoon_proc_fops = {
	396	.owner = THIS_MODULE,
	397	.open = typhoon_proc_open,
	398	.read = seq_read,
	399	.llseek = seq_lseek,
	400	.release = single_release,
	401	};
1da177e4 LT	402	#endif /* CONFIG_RADIO_TYPHOON_PROC_FS */
	403
	404	MODULE_AUTHOR("Dr. Henrik Seidel");
	405	MODULE_DESCRIPTION("A driver for the Typhoon radio card (a.k.a. EcoRadio).");
	406	MODULE_LICENSE("GPL");
	407
	408	static int io = -1;
	409	static int radio_nr = -1;
	410
	411	module_param(io, int, 0);
	412	MODULE_PARM_DESC(io, "I/O address of the Typhoon card (0x316 or 0x336)");
	413	module_param(radio_nr, int, 0);
	414
	415	#ifdef MODULE
ff699e6b	416	static unsigned long mutefreq;
1da177e4 LT	417	module_param(mutefreq, ulong, 0);
	418	MODULE_PARM_DESC(mutefreq, "Frequency used when muting the card (in kHz)");
	419	#endif
	420
	421	static int __init typhoon_init(void)
	422	{
	423	#ifdef MODULE
	424	if (io == -1) {
	425	printk(KERN_ERR "radio-typhoon: You must set an I/O address with io=0x316 or io=0x336\n");
	426	return -EINVAL;
	427	}
	428	typhoon_unit.iobase = io;
	429
	430	if (mutefreq < 87000 \|\| mutefreq > 108500) {
	431	printk(KERN_ERR "radio-typhoon: You must set a frequency (in kHz) used when muting the card,\n");
	432	printk(KERN_ERR "radio-typhoon: e.g. with \"mutefreq=87500\" (87000 <= mutefreq <= 108500)\n");
	433	return -EINVAL;
	434	}
	435	typhoon_unit.mutefreq = mutefreq;
	436	#endif /* MODULE */
	437
	438	printk(KERN_INFO BANNER);
3593cab5	439	mutex_init(&typhoon_unit.lock);
1da177e4 LT	440	io = typhoon_unit.iobase;
	441	if (!request_region(io, 8, "typhoon")) {
	442	printk(KERN_ERR "radio-typhoon: port 0x%x already in use\n",
	443	typhoon_unit.iobase);
	444	return -EBUSY;
	445	}
	446
	447	typhoon_radio.priv = &typhoon_unit;
	448	if (video_register_device(&typhoon_radio, VFL_TYPE_RADIO, radio_nr) == -1)
	449	{
	450	release_region(io, 8);
	451	return -EINVAL;
	452	}
	453	printk(KERN_INFO "radio-typhoon: port 0x%x.\n", typhoon_unit.iobase);
	454	printk(KERN_INFO "radio-typhoon: mute frequency is %lu kHz.\n",
	455	typhoon_unit.mutefreq);
	456	typhoon_unit.mutefreq <<= 4;
	457
	458	/* mute card - prevents noisy bootups */
	459	typhoon_mute(&typhoon_unit);
	460
	461	#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
0b9c2b7a	462	if (!proc_create("driver/radio-typhoon", 0, NULL, &typhoon_proc_fops))
657de3cd	463	printk(KERN_ERR "radio-typhoon: registering /proc/driver/radio-typhoon failed\n");
1da177e4 LT	464	#endif
	465
	466	return 0;
	467	}
	468
	469	static void __exit typhoon_cleanup_module(void)
	470	{
	471
	472	#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
	473	remove_proc_entry("driver/radio-typhoon", NULL);
	474	#endif
	475
	476	video_unregister_device(&typhoon_radio);
	477	release_region(io, 8);
	478	}
	479
	480	module_init(typhoon_init);
	481	module_exit(typhoon_cleanup_module);
	482