[mirror_ubuntu-artful-kernel.git] / drivers / media / radio / radio-aztech.c

/* radio-aztech.c - Aztech radio card driver for Linux 2.2
 *
 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
 * Adapted to support the Video for Linux API by
 * Russell Kroll <rkroll@exploits.org>.  Based on original tuner code by:
 *
 * Quay Ly
 * Donald Song
 * Jason Lewis      (jlewis@twilight.vtc.vsc.edu)
 * Scott McGrath    (smcgrath@twilight.vtc.vsc.edu)
 * William McGrath  (wmcgrath@twilight.vtc.vsc.edu)
 *
 * The basis for this code may be found at http://bigbang.vtc.vsc.edu/fmradio/
 * along with more information on the card itself.
 *
 * History:
 * 1999-02-24	Russell Kroll <rkroll@exploits.org>
 *		Fine tuning/VIDEO_TUNER_LOW
 * 		Range expanded to 87-108 MHz (from 87.9-107.8)
 *
 * Notable changes from the original source:
 * - includes stripped down to the essentials
 * - for loops used as delays replaced with udelay()
 * - #defines removed, changed to static values
 * - tuning structure changed - no more character arrays, other changes
*/

#include <linux/module.h>	/* Modules 			*/
#include <linux/init.h>		/* Initdata			*/
#include <linux/ioport.h>	/* request_region		*/
#include <linux/delay.h>	/* udelay			*/
#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(0,0,2)

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       = 0xff,
		.step          = 1,
		.default_value = 0xff,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	}
};

/* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */

#ifndef CONFIG_RADIO_AZTECH_PORT
#define CONFIG_RADIO_AZTECH_PORT -1
#endif

static int io = CONFIG_RADIO_AZTECH_PORT;
static int radio_nr = -1;
static int radio_wait_time = 1000;
static struct mutex lock;

struct az_device
{
	unsigned long in_use;
	int curvol;
	unsigned long curfreq;
	int stereo;
};

static int volconvert(int level)
{
	level>>=14;		/* Map 16bits down to 2 bit */
	level&=3;

	/* convert to card-friendly values */
	switch (level)
	{
		case 0:
			return 0;
		case 1:
			return 1;
		case 2:
			return 4;
		case 3:
			return 5;
	}
	return 0;	/* Quieten gcc */
}

static void send_0_byte (struct az_device *dev)
{
	udelay(radio_wait_time);
	outb_p(2+volconvert(dev->curvol), io);
	outb_p(64+2+volconvert(dev->curvol), io);
}

static void send_1_byte (struct az_device *dev)
{
	udelay (radio_wait_time);
	outb_p(128+2+volconvert(dev->curvol), io);
	outb_p(128+64+2+volconvert(dev->curvol), io);
}

static int az_setvol(struct az_device *dev, int vol)
{
	mutex_lock(&lock);
	outb (volconvert(vol), io);
	mutex_unlock(&lock);
	return 0;
}

/* thanks to Michael Dwyer for giving me a dose of clues in
 * the signal strength department..
 *
 * This card has a stereo bit - bit 0 set = mono, not set = stereo
 * It also has a "signal" bit - bit 1 set = bad signal, not set = good
 *
 */

static int az_getsigstr(struct az_device *dev)
{
	if (inb(io) & 2)	/* bit set = no signal present */
		return 0;
	return 1;		/* signal present */
}

static int az_getstereo(struct az_device *dev)
{
	if (inb(io) & 1) 	/* bit set = mono */
		return 0;
	return 1;		/* stereo */
}

static int az_setfreq(struct az_device *dev, unsigned long frequency)
{
	int  i;

	frequency += 171200;		/* Add 10.7 MHz IF		*/
	frequency /= 800;		/* Convert to 50 kHz units	*/

	mutex_lock(&lock);

	send_0_byte (dev);		/*  0: LSB of frequency       */

	for (i = 0; i < 13; i++)	/*   : frequency bits (1-13)  */
		if (frequency & (1 << i))
			send_1_byte (dev);
		else
			send_0_byte (dev);

	send_0_byte (dev);		/* 14: test bit - always 0    */
	send_0_byte (dev);		/* 15: test bit - always 0    */
	send_0_byte (dev);		/* 16: band data 0 - always 0 */
	if (dev->stereo)		/* 17: stereo (1 to enable)   */
		send_1_byte (dev);
	else
		send_0_byte (dev);

	send_1_byte (dev);		/* 18: band data 1 - unknown  */
	send_0_byte (dev);		/* 19: time base - always 0   */
	send_0_byte (dev);		/* 20: spacing (0 = 25 kHz)   */
	send_1_byte (dev);		/* 21: spacing (1 = 25 kHz)   */
	send_0_byte (dev);		/* 22: spacing (0 = 25 kHz)   */
	send_1_byte (dev);		/* 23: AM/FM (FM = 1, always) */

	/* latch frequency */

	udelay (radio_wait_time);
	outb_p(128+64+volconvert(dev->curvol), io);

	mutex_unlock(&lock);

	return 0;
}

static int vidioc_querycap (struct file *file, void  *priv,
					struct v4l2_capability *v)
{
	strlcpy(v->driver, "radio-aztech", sizeof (v->driver));
	strlcpy(v->card, "Aztech 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)
{
	struct az_device *az = video_drvdata(file);

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

	strcpy(v->name, "FM");
	v->type = V4L2_TUNER_RADIO;

	v->rangelow=(87*16000);
	v->rangehigh=(108*16000);
	v->rxsubchans =V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
	v->capability=V4L2_TUNER_CAP_LOW;
	if(az_getstereo(az))
		v->audmode = V4L2_TUNER_MODE_STEREO;
	else
		v->audmode = V4L2_TUNER_MODE_MONO;
	v->signal=0xFFFF*az_getsigstr(az);

	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_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 int vidioc_s_frequency (struct file *file, void *priv,
				struct v4l2_frequency *f)
{
	struct az_device *az = video_drvdata(file);

	az->curfreq = f->frequency;
	az_setfreq(az, az->curfreq);
	return 0;
}

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

	f->type = V4L2_TUNER_RADIO;
	f->frequency = az->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 az_device *az = video_drvdata(file);

	switch (ctrl->id) {
		case V4L2_CID_AUDIO_MUTE:
			if (az->curvol==0)
				ctrl->value=1;
			else
				ctrl->value=0;
			return (0);
		case V4L2_CID_AUDIO_VOLUME:
			ctrl->value=az->curvol * 6554;
			return (0);
	}
	return -EINVAL;
}

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

	switch (ctrl->id) {
		case V4L2_CID_AUDIO_MUTE:
			if (ctrl->value) {
				az_setvol(az,0);
			} else {
				az_setvol(az,az->curvol);
			}
			return (0);
		case V4L2_CID_AUDIO_VOLUME:
			az_setvol(az,ctrl->value);
			return (0);
	}
	return -EINVAL;
}

static struct az_device aztech_unit;

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

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

static const struct v4l2_file_operations aztech_fops = {
	.owner		= THIS_MODULE,
	.open           = aztech_exclusive_open,
	.release        = aztech_exclusive_release,
	.ioctl		= video_ioctl2,
};

static const struct v4l2_ioctl_ops aztech_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 aztech_radio = {
	.name		= "Aztech radio",
	.fops           = &aztech_fops,
	.ioctl_ops 	= &aztech_ioctl_ops,
	.release	= video_device_release_empty,
};

module_param_named(debug,aztech_radio.debug, int, 0644);
MODULE_PARM_DESC(debug,"activates debug info");

static int __init aztech_init(void)
{
	if(io==-1)
	{
		printk(KERN_ERR "You must set an I/O address with io=0x???\n");
		return -EINVAL;
	}

	if (!request_region(io, 2, "aztech"))
	{
		printk(KERN_ERR "aztech: port 0x%x already in use\n", io);
		return -EBUSY;
	}

	mutex_init(&lock);
	video_set_drvdata(&aztech_radio, &aztech_unit);

	if (video_register_device(&aztech_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
		release_region(io,2);
		return -EINVAL;
	}

	printk(KERN_INFO "Aztech radio card driver v1.00/19990224 rkroll@exploits.org\n");
	/* mute card - prevents noisy bootups */
	outb (0, io);
	return 0;
}

MODULE_AUTHOR("Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
MODULE_DESCRIPTION("A driver for the Aztech radio card.");
MODULE_LICENSE("GPL");

module_param(io, int, 0);
module_param(radio_nr, int, 0);
MODULE_PARM_DESC(io, "I/O address of the Aztech card (0x350 or 0x358)");

static void __exit aztech_cleanup(void)
{
	video_unregister_device(&aztech_radio);
	release_region(io,2);
}

module_init(aztech_init);
module_exit(aztech_cleanup);
Commit	Line	Data
4286c6f6	1	/* radio-aztech.c - Aztech radio card driver for Linux 2.2
1da177e4	2	*
a4366af4	3	* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
4286c6f6	4	* Adapted to support the Video for Linux API by
1da177e4 LT	5	* Russell Kroll <rkroll@exploits.org>. Based on original tuner code by:
	6	*
	7	* Quay Ly
	8	* Donald Song
4286c6f6	9	* Jason Lewis (jlewis@twilight.vtc.vsc.edu)
1da177e4 LT	10	* Scott McGrath (smcgrath@twilight.vtc.vsc.edu)
	11	* William McGrath (wmcgrath@twilight.vtc.vsc.edu)
	12	*
	13	* The basis for this code may be found at http://bigbang.vtc.vsc.edu/fmradio/
	14	* along with more information on the card itself.
	15	*
	16	* History:
	17	* 1999-02-24 Russell Kroll <rkroll@exploits.org>
	18	* Fine tuning/VIDEO_TUNER_LOW
	19	* Range expanded to 87-108 MHz (from 87.9-107.8)
	20	*
	21	* Notable changes from the original source:
	22	* - includes stripped down to the essentials
	23	* - for loops used as delays replaced with udelay()
	24	* - #defines removed, changed to static values
	25	* - tuning structure changed - no more character arrays, other changes
	26	*/
	27
	28	#include <linux/module.h> /* Modules */
	29	#include <linux/init.h> /* Initdata */
fb911ee8	30	#include <linux/ioport.h> /* request_region */
1da177e4 LT	31	#include <linux/delay.h> /* udelay */
	32	#include <asm/io.h> /* outb, outb_p */
	33	#include <asm/uaccess.h> /* copy to/from user */
a4366af4	34	#include <linux/videodev2.h> /* kernel radio structs */
5e87efa3	35	#include <media/v4l2-common.h>
35ea11ff	36	#include <media/v4l2-ioctl.h>
1da177e4	37
a4366af4 MCC	38	#include <linux/version.h> /* for KERNEL_VERSION MACRO */
	39	#define RADIO_VERSION KERNEL_VERSION(0,0,2)
	40
	41	static struct v4l2_queryctrl radio_qctrl[] = {
	42	{
	43	.id = V4L2_CID_AUDIO_MUTE,
	44	.name = "Mute",
	45	.minimum = 0,
	46	.maximum = 1,
	47	.default_value = 1,
	48	.type = V4L2_CTRL_TYPE_BOOLEAN,
	49	},{
	50	.id = V4L2_CID_AUDIO_VOLUME,
	51	.name = "Volume",
	52	.minimum = 0,
	53	.maximum = 0xff,
	54	.step = 1,
	55	.default_value = 0xff,
	56	.type = V4L2_CTRL_TYPE_INTEGER,
	57	}
	58	};
	59
1da177e4 LT	60	/* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
	61
	62	#ifndef CONFIG_RADIO_AZTECH_PORT
	63	#define CONFIG_RADIO_AZTECH_PORT -1
	64	#endif
	65
4286c6f6	66	static int io = CONFIG_RADIO_AZTECH_PORT;
1da177e4 LT	67	static int radio_nr = -1;
1da177e4 LT	68	static int radio_wait_time = 1000;
3593cab5	69	static struct mutex lock;
1da177e4 LT	70
	71	struct az_device
	72	{
3ca685aa	73	unsigned long in_use;
1da177e4 LT	74	int curvol;
	75	unsigned long curfreq;
	76	int stereo;
	77	};
	78
	79	static int volconvert(int level)
	80	{
4286c6f6 MCC	81	level>>=14; /* Map 16bits down to 2 bit */
	82	level&=3;
	83
1da177e4	84	/* convert to card-friendly values */
4286c6f6	85	switch (level)
1da177e4	86	{
4286c6f6	87	case 0:
1da177e4	88	return 0;
4286c6f6	89	case 1:
1da177e4 LT	90	return 1;
	91	case 2:
	92	return 4;
	93	case 3:
	94	return 5;
	95	}
	96	return 0; /* Quieten gcc */
	97	}
	98
	99	static void send_0_byte (struct az_device *dev)
	100	{
	101	udelay(radio_wait_time);
	102	outb_p(2+volconvert(dev->curvol), io);
	103	outb_p(64+2+volconvert(dev->curvol), io);
	104	}
	105
	106	static void send_1_byte (struct az_device *dev)
	107	{
	108	udelay (radio_wait_time);
	109	outb_p(128+2+volconvert(dev->curvol), io);
	110	outb_p(128+64+2+volconvert(dev->curvol), io);
	111	}
	112
	113	static int az_setvol(struct az_device *dev, int vol)
	114	{
3593cab5	115	mutex_lock(&lock);
1da177e4	116	outb (volconvert(vol), io);
3593cab5	117	mutex_unlock(&lock);
1da177e4 LT	118	return 0;
	119	}
	120
	121	/* thanks to Michael Dwyer for giving me a dose of clues in
	122	* the signal strength department..
	123	*
	124	* This card has a stereo bit - bit 0 set = mono, not set = stereo
	125	* It also has a "signal" bit - bit 1 set = bad signal, not set = good
	126	*
	127	*/
	128
	129	static int az_getsigstr(struct az_device *dev)
	130	{
	131	if (inb(io) & 2) /* bit set = no signal present */
	132	return 0;
	133	return 1; /* signal present */
	134	}
	135
	136	static int az_getstereo(struct az_device *dev)
	137	{
	138	if (inb(io) & 1) /* bit set = mono */
	139	return 0;
	140	return 1; /* stereo */
	141	}
	142
	143	static int az_setfreq(struct az_device *dev, unsigned long frequency)
	144	{
	145	int i;
	146
	147	frequency += 171200; /* Add 10.7 MHz IF */
	148	frequency /= 800; /* Convert to 50 kHz units */
4286c6f6	149
3593cab5	150	mutex_lock(&lock);
4286c6f6	151
1da177e4 LT	152	send_0_byte (dev); /* 0: LSB of frequency */
	153
	154	for (i = 0; i < 13; i++) /* : frequency bits (1-13) */
	155	if (frequency & (1 << i))
	156	send_1_byte (dev);
	157	else
	158	send_0_byte (dev);
	159
	160	send_0_byte (dev); /* 14: test bit - always 0 */
	161	send_0_byte (dev); /* 15: test bit - always 0 */
	162	send_0_byte (dev); /* 16: band data 0 - always 0 */
	163	if (dev->stereo) /* 17: stereo (1 to enable) */
	164	send_1_byte (dev);
	165	else
	166	send_0_byte (dev);
	167
	168	send_1_byte (dev); /* 18: band data 1 - unknown */
	169	send_0_byte (dev); /* 19: time base - always 0 */
	170	send_0_byte (dev); /* 20: spacing (0 = 25 kHz) */
	171	send_1_byte (dev); /* 21: spacing (1 = 25 kHz) */
	172	send_0_byte (dev); /* 22: spacing (0 = 25 kHz) */
	173	send_1_byte (dev); /* 23: AM/FM (FM = 1, always) */
	174
	175	/* latch frequency */
	176
	177	udelay (radio_wait_time);
	178	outb_p(128+64+volconvert(dev->curvol), io);
4286c6f6	179
3593cab5	180	mutex_unlock(&lock);
1da177e4 LT	181
	182	return 0;
	183	}
	184
99218fe4 MCC	185	static int vidioc_querycap (struct file file, void priv,
	186	struct v4l2_capability *v)
	187	{
	188	strlcpy(v->driver, "radio-aztech", sizeof (v->driver));
	189	strlcpy(v->card, "Aztech 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)
1da177e4	198	{
c170ecf4	199	struct az_device *az = video_drvdata(file);
4286c6f6	200
99218fe4 MCC	201	if (v->index > 0)
99218fe4 MCC	202	return -EINVAL;
a4366af4	203
99218fe4 MCC	204	strcpy(v->name, "FM");
99218fe4 MCC	205	v->type = V4L2_TUNER_RADIO;
a4366af4	206
99218fe4 MCC	207	v->rangelow=(87*16000);
	208	v->rangehigh=(108*16000);
	209	v->rxsubchans =V4L2_TUNER_SUB_MONO\|V4L2_TUNER_SUB_STEREO;
	210	v->capability=V4L2_TUNER_CAP_LOW;
	211	if(az_getstereo(az))
	212	v->audmode = V4L2_TUNER_MODE_STEREO;
	213	else
	214	v->audmode = V4L2_TUNER_MODE_MONO;
	215	v->signal=0xFFFF*az_getsigstr(az);
a4366af4	216
99218fe4 MCC	217	return 0;
99218fe4 MCC	218	}
a4366af4	219
a4366af4	220
99218fe4 MCC	221	static int vidioc_s_tuner (struct file file, void priv,
	222	struct v4l2_tuner *v)
	223	{
	224	if (v->index > 0)
	225	return -EINVAL;
a4366af4	226
99218fe4 MCC	227	return 0;
99218fe4 MCC	228	}
a4366af4	229
676b0ac7 MCC	230	static int vidioc_g_audio (struct file file, void priv,
	231	struct v4l2_audio *a)
	232	{
	233	if (a->index > 1)
	234	return -EINVAL;
	235
	236	strcpy(a->name, "Radio");
	237	a->capability = V4L2_AUDCAP_STEREO;
	238	return 0;
	239	}
	240
a0c05ab9 MCC	241	static int vidioc_g_input(struct file filp, void priv, unsigned int *i)
	242	{
	243	*i = 0;
	244	return 0;
	245	}
	246
	247	static int vidioc_s_input(struct file filp, void priv, unsigned int i)
	248	{
	249	if (i != 0)
	250	return -EINVAL;
	251	return 0;
	252	}
	253
	254
676b0ac7 MCC	255	static int vidioc_s_audio (struct file file, void priv,
	256	struct v4l2_audio *a)
	257	{
	258	if (a->index != 0)
	259	return -EINVAL;
	260
	261	return 0;
	262	}
	263
99218fe4 MCC	264	static int vidioc_s_frequency (struct file file, void priv,
	265	struct v4l2_frequency *f)
	266	{
c170ecf4	267	struct az_device *az = video_drvdata(file);
a4366af4	268
99218fe4 MCC	269	az->curfreq = f->frequency;
	270	az_setfreq(az, az->curfreq);
	271	return 0;
	272	}
	273
	274	static int vidioc_g_frequency (struct file file, void priv,
	275	struct v4l2_frequency *f)
	276	{
c170ecf4	277	struct az_device *az = video_drvdata(file);
99218fe4 MCC	278
	279	f->type = V4L2_TUNER_RADIO;
	280	f->frequency = az->curfreq;
	281
	282	return 0;
	283	}
	284
	285	static int vidioc_queryctrl (struct file file, void priv,
	286	struct v4l2_queryctrl *qc)
	287	{
	288	int i;
	289
	290	for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
	291	if (qc->id && qc->id == radio_qctrl[i].id) {
	292	memcpy(qc, &(radio_qctrl[i]),
	293	sizeof(*qc));
	294	return (0);
1da177e4	295	}
99218fe4 MCC	296	}
	297	return -EINVAL;
	298	}
a4366af4	299
99218fe4 MCC	300	static int vidioc_g_ctrl (struct file file, void priv,
	301	struct v4l2_control *ctrl)
	302	{
c170ecf4	303	struct az_device *az = video_drvdata(file);
99218fe4 MCC	304
	305	switch (ctrl->id) {
	306	case V4L2_CID_AUDIO_MUTE:
	307	if (az->curvol==0)
	308	ctrl->value=1;
	309	else
	310	ctrl->value=0;
	311	return (0);
	312	case V4L2_CID_AUDIO_VOLUME:
	313	ctrl->value=az->curvol * 6554;
	314	return (0);
1da177e4	315	}
99218fe4	316	return -EINVAL;
1da177e4 LT	317	}
1da177e4 LT	318
99218fe4 MCC	319	static int vidioc_s_ctrl (struct file file, void priv,
99218fe4 MCC	320	struct v4l2_control *ctrl)
1da177e4	321	{
c170ecf4	322	struct az_device *az = video_drvdata(file);
99218fe4 MCC	323
	324	switch (ctrl->id) {
	325	case V4L2_CID_AUDIO_MUTE:
	326	if (ctrl->value) {
	327	az_setvol(az,0);
	328	} else {
	329	az_setvol(az,az->curvol);
	330	}
	331	return (0);
	332	case V4L2_CID_AUDIO_VOLUME:
	333	az_setvol(az,ctrl->value);
	334	return (0);
	335	}
	336	return -EINVAL;
1da177e4 LT	337	}
	338
	339	static struct az_device aztech_unit;
	340
bec43661	341	static int aztech_exclusive_open(struct file *file)
3ca685aa HV	342	{
	343	return test_and_set_bit(0, &aztech_unit.in_use) ? -EBUSY : 0;
	344	}
	345
bec43661	346	static int aztech_exclusive_release(struct file *file)
3ca685aa HV	347	{
	348	clear_bit(0, &aztech_unit.in_use);
	349	return 0;
	350	}
	351
bec43661	352	static const struct v4l2_file_operations aztech_fops = {
1da177e4	353	.owner = THIS_MODULE,
3ca685aa HV	354	.open = aztech_exclusive_open,
3ca685aa HV	355	.release = aztech_exclusive_release,
99218fe4	356	.ioctl = video_ioctl2,
1da177e4 LT	357	};
1da177e4 LT	358
a399810c	359	static const struct v4l2_ioctl_ops aztech_ioctl_ops = {
99218fe4 MCC	360	.vidioc_querycap = vidioc_querycap,
	361	.vidioc_g_tuner = vidioc_g_tuner,
	362	.vidioc_s_tuner = vidioc_s_tuner,
676b0ac7 MCC	363	.vidioc_g_audio = vidioc_g_audio,
676b0ac7 MCC	364	.vidioc_s_audio = vidioc_s_audio,
a0c05ab9 MCC	365	.vidioc_g_input = vidioc_g_input,
a0c05ab9 MCC	366	.vidioc_s_input = vidioc_s_input,
99218fe4 MCC	367	.vidioc_g_frequency = vidioc_g_frequency,
	368	.vidioc_s_frequency = vidioc_s_frequency,
	369	.vidioc_queryctrl = vidioc_queryctrl,
	370	.vidioc_g_ctrl = vidioc_g_ctrl,
	371	.vidioc_s_ctrl = vidioc_s_ctrl,
1da177e4 LT	372	};
1da177e4 LT	373
a399810c	374	static struct video_device aztech_radio = {
aa5e90af HV	375	.name = "Aztech radio",
	376	.fops = &aztech_fops,
	377	.ioctl_ops = &aztech_ioctl_ops,
	378	.release = video_device_release_empty,
a399810c HV	379	};
a399810c HV	380
99218fe4 MCC	381	module_param_named(debug,aztech_radio.debug, int, 0644);
	382	MODULE_PARM_DESC(debug,"activates debug info");
	383
1da177e4 LT	384	static int __init aztech_init(void)
	385	{
	386	if(io==-1)
	387	{
	388	printk(KERN_ERR "You must set an I/O address with io=0x???\n");
	389	return -EINVAL;
	390	}
	391
4286c6f6	392	if (!request_region(io, 2, "aztech"))
1da177e4 LT	393	{
	394	printk(KERN_ERR "aztech: port 0x%x already in use\n", io);
	395	return -EBUSY;
	396	}
	397
3593cab5	398	mutex_init(&lock);
601e9444	399	video_set_drvdata(&aztech_radio, &aztech_unit);
4286c6f6	400
cba99ae8	401	if (video_register_device(&aztech_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
1da177e4 LT	402	release_region(io,2);
	403	return -EINVAL;
	404	}
4286c6f6	405
1da177e4 LT	406	printk(KERN_INFO "Aztech radio card driver v1.00/19990224 rkroll@exploits.org\n");
	407	/* mute card - prevents noisy bootups */
	408	outb (0, io);
	409	return 0;
	410	}
	411
	412	MODULE_AUTHOR("Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
	413	MODULE_DESCRIPTION("A driver for the Aztech radio card.");
	414	MODULE_LICENSE("GPL");
	415
	416	module_param(io, int, 0);
	417	module_param(radio_nr, int, 0);
	418	MODULE_PARM_DESC(io, "I/O address of the Aztech card (0x350 or 0x358)");
	419
	420	static void __exit aztech_cleanup(void)
	421	{
	422	video_unregister_device(&aztech_radio);
	423	release_region(io,2);
	424	}
	425
	426	module_init(aztech_init);
	427	module_exit(aztech_cleanup);