[deliverable/linux.git] / drivers / media / radio / tea575x.c

/*
 *   ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips
 *
 *	Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <linux/delay.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <asm/io.h>
#include <media/v4l2-device.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-event.h>
#include <media/tea575x.h>

MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("Routines for control of TEA5757/5759 Philips AM/FM radio tuner chips");
MODULE_LICENSE("GPL");

/*
 * definitions
 */

#define TEA575X_BIT_SEARCH	(1<<24)		/* 1 = search action, 0 = tuned */
#define TEA575X_BIT_UPDOWN	(1<<23)		/* 0 = search down, 1 = search up */
#define TEA575X_BIT_MONO	(1<<22)		/* 0 = stereo, 1 = mono */
#define TEA575X_BIT_BAND_MASK	(3<<20)
#define TEA575X_BIT_BAND_FM	(0<<20)
#define TEA575X_BIT_BAND_MW	(1<<20)
#define TEA575X_BIT_BAND_LW	(2<<20)
#define TEA575X_BIT_BAND_SW	(3<<20)
#define TEA575X_BIT_PORT_0	(1<<19)		/* user bit */
#define TEA575X_BIT_PORT_1	(1<<18)		/* user bit */
#define TEA575X_BIT_SEARCH_MASK	(3<<16)		/* search level */
#define TEA575X_BIT_SEARCH_5_28	     (0<<16)	/* FM >5uV, AM >28uV */
#define TEA575X_BIT_SEARCH_10_40     (1<<16)	/* FM >10uV, AM > 40uV */
#define TEA575X_BIT_SEARCH_30_63     (2<<16)	/* FM >30uV, AM > 63uV */
#define TEA575X_BIT_SEARCH_150_1000  (3<<16)	/* FM > 150uV, AM > 1000uV */
#define TEA575X_BIT_DUMMY	(1<<15)		/* buffer */
#define TEA575X_BIT_FREQ_MASK	0x7fff

enum { BAND_FM, BAND_FM_JAPAN, BAND_AM };

static const struct v4l2_frequency_band bands[] = {
	{
		.type = V4L2_TUNER_RADIO,
		.index = 0,
		.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
			      V4L2_TUNER_CAP_FREQ_BANDS,
		.rangelow   =  87500 * 16,
		.rangehigh  = 108000 * 16,
		.modulation = V4L2_BAND_MODULATION_FM,
	},
	{
		.type = V4L2_TUNER_RADIO,
		.index = 0,
		.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
			      V4L2_TUNER_CAP_FREQ_BANDS,
		.rangelow   = 76000 * 16,
		.rangehigh  = 91000 * 16,
		.modulation = V4L2_BAND_MODULATION_FM,
	},
	{
		.type = V4L2_TUNER_RADIO,
		.index = 1,
		.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS,
		.rangelow   =  530 * 16,
		.rangehigh  = 1710 * 16,
		.modulation = V4L2_BAND_MODULATION_AM,
	},
};

/*
 * lowlevel part
 */

static void snd_tea575x_write(struct snd_tea575x *tea, unsigned int val)
{
	u16 l;
	u8 data;

	if (tea->ops->write_val)
		return tea->ops->write_val(tea, val);

	tea->ops->set_direction(tea, 1);
	udelay(16);

	for (l = 25; l > 0; l--) {
		data = (val >> 24) & TEA575X_DATA;
		val <<= 1;			/* shift data */
		tea->ops->set_pins(tea, data | TEA575X_WREN);
		udelay(2);
		tea->ops->set_pins(tea, data | TEA575X_WREN | TEA575X_CLK);
		udelay(2);
		tea->ops->set_pins(tea, data | TEA575X_WREN);
		udelay(2);
	}

	if (!tea->mute)
		tea->ops->set_pins(tea, 0);
}

static u32 snd_tea575x_read(struct snd_tea575x *tea)
{
	u16 l, rdata;
	u32 data = 0;

	if (tea->ops->read_val)
		return tea->ops->read_val(tea);

	tea->ops->set_direction(tea, 0);
	tea->ops->set_pins(tea, 0);
	udelay(16);

	for (l = 24; l--;) {
		tea->ops->set_pins(tea, TEA575X_CLK);
		udelay(2);
		if (!l)
			tea->tuned = tea->ops->get_pins(tea) & TEA575X_MOST ? 0 : 1;
		tea->ops->set_pins(tea, 0);
		udelay(2);
		data <<= 1;			/* shift data */
		rdata = tea->ops->get_pins(tea);
		if (!l)
			tea->stereo = (rdata & TEA575X_MOST) ?  0 : 1;
		if (rdata & TEA575X_DATA)
			data++;
		udelay(2);
	}

	if (tea->mute)
		tea->ops->set_pins(tea, TEA575X_WREN);

	return data;
}

static u32 snd_tea575x_val_to_freq(struct snd_tea575x *tea, u32 val)
{
	u32 freq = val & TEA575X_BIT_FREQ_MASK;

	if (freq == 0)
		return freq;

	switch (tea->band) {
	case BAND_FM:
		/* freq *= 12.5 */
		freq *= 125;
		freq /= 10;
		/* crystal fixup */
		freq -= TEA575X_FMIF;
		break;
	case BAND_FM_JAPAN:
		/* freq *= 12.5 */
		freq *= 125;
		freq /= 10;
		/* crystal fixup */
		freq += TEA575X_FMIF;
		break;
	case BAND_AM:
		/* crystal fixup */
		freq -= TEA575X_AMIF;
		break;
	}

	return clamp(freq * 16, bands[tea->band].rangelow,
				bands[tea->band].rangehigh); /* from kHz */
}

static u32 snd_tea575x_get_freq(struct snd_tea575x *tea)
{
	return snd_tea575x_val_to_freq(tea, snd_tea575x_read(tea));
}

void snd_tea575x_set_freq(struct snd_tea575x *tea)
{
	u32 freq = tea->freq / 16;	/* to kHz */
	u32 band = 0;

	switch (tea->band) {
	case BAND_FM:
		band = TEA575X_BIT_BAND_FM;
		/* crystal fixup */
		freq += TEA575X_FMIF;
		/* freq /= 12.5 */
		freq *= 10;
		freq /= 125;
		break;
	case BAND_FM_JAPAN:
		band = TEA575X_BIT_BAND_FM;
		/* crystal fixup */
		freq -= TEA575X_FMIF;
		/* freq /= 12.5 */
		freq *= 10;
		freq /= 125;
		break;
	case BAND_AM:
		band = TEA575X_BIT_BAND_MW;
		/* crystal fixup */
		freq += TEA575X_AMIF;
		break;
	}

	tea->val &= ~(TEA575X_BIT_FREQ_MASK | TEA575X_BIT_BAND_MASK);
	tea->val |= band;
	tea->val |= freq & TEA575X_BIT_FREQ_MASK;
	snd_tea575x_write(tea, tea->val);
	tea->freq = snd_tea575x_val_to_freq(tea, tea->val);
}

/*
 * Linux Video interface
 */

static int vidioc_querycap(struct file *file, void  *priv,
					struct v4l2_capability *v)
{
	struct snd_tea575x *tea = video_drvdata(file);

	strlcpy(v->driver, tea->v4l2_dev->name, sizeof(v->driver));
	strlcpy(v->card, tea->card, sizeof(v->card));
	strlcat(v->card, tea->tea5759 ? " TEA5759" : " TEA5757", sizeof(v->card));
	strlcpy(v->bus_info, tea->bus_info, sizeof(v->bus_info));
	v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
	if (!tea->cannot_read_data)
		v->device_caps |= V4L2_CAP_HW_FREQ_SEEK;
	v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
	return 0;
}

int snd_tea575x_enum_freq_bands(struct snd_tea575x *tea,
					struct v4l2_frequency_band *band)
{
	int index;

	if (band->tuner != 0)
		return -EINVAL;

	switch (band->index) {
	case 0:
		if (tea->tea5759)
			index = BAND_FM_JAPAN;
		else
			index = BAND_FM;
		break;
	case 1:
		if (tea->has_am) {
			index = BAND_AM;
			break;
		}
		/* Fall through */
	default:
		return -EINVAL;
	}

	*band = bands[index];
	if (!tea->cannot_read_data)
		band->capability |= V4L2_TUNER_CAP_HWSEEK_BOUNDED;

	return 0;
}
EXPORT_SYMBOL(snd_tea575x_enum_freq_bands);

static int vidioc_enum_freq_bands(struct file *file, void *priv,
					 struct v4l2_frequency_band *band)
{
	struct snd_tea575x *tea = video_drvdata(file);

	return snd_tea575x_enum_freq_bands(tea, band);
}

int snd_tea575x_g_tuner(struct snd_tea575x *tea, struct v4l2_tuner *v)
{
	struct v4l2_frequency_band band_fm = { 0, };

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

	snd_tea575x_read(tea);
	snd_tea575x_enum_freq_bands(tea, &band_fm);

	memset(v, 0, sizeof(*v));
	strlcpy(v->name, tea->has_am ? "FM/AM" : "FM", sizeof(v->name));
	v->type = V4L2_TUNER_RADIO;
	v->capability = band_fm.capability;
	v->rangelow = tea->has_am ? bands[BAND_AM].rangelow : band_fm.rangelow;
	v->rangehigh = band_fm.rangehigh;
	v->rxsubchans = tea->stereo ? V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
	v->audmode = (tea->val & TEA575X_BIT_MONO) ?
		V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO;
	v->signal = tea->tuned ? 0xffff : 0;
	return 0;
}
EXPORT_SYMBOL(snd_tea575x_g_tuner);

static int vidioc_g_tuner(struct file *file, void *priv,
					struct v4l2_tuner *v)
{
	struct snd_tea575x *tea = video_drvdata(file);

	return snd_tea575x_g_tuner(tea, v);
}

static int vidioc_s_tuner(struct file *file, void *priv,
					const struct v4l2_tuner *v)
{
	struct snd_tea575x *tea = video_drvdata(file);
	u32 orig_val = tea->val;

	if (v->index)
		return -EINVAL;
	tea->val &= ~TEA575X_BIT_MONO;
	if (v->audmode == V4L2_TUNER_MODE_MONO)
		tea->val |= TEA575X_BIT_MONO;
	/* Only apply changes if currently tuning FM */
	if (tea->band != BAND_AM && tea->val != orig_val)
		snd_tea575x_set_freq(tea);

	return 0;
}

static int vidioc_g_frequency(struct file *file, void *priv,
					struct v4l2_frequency *f)
{
	struct snd_tea575x *tea = video_drvdata(file);

	if (f->tuner != 0)
		return -EINVAL;
	f->type = V4L2_TUNER_RADIO;
	f->frequency = tea->freq;
	return 0;
}

static int vidioc_s_frequency(struct file *file, void *priv,
					const struct v4l2_frequency *f)
{
	struct snd_tea575x *tea = video_drvdata(file);

	if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
		return -EINVAL;

	if (tea->has_am && f->frequency < (20000 * 16))
		tea->band = BAND_AM;
	else if (tea->tea5759)
		tea->band = BAND_FM_JAPAN;
	else
		tea->band = BAND_FM;

	tea->freq = clamp_t(u32, f->frequency, bands[tea->band].rangelow,
					bands[tea->band].rangehigh);
	snd_tea575x_set_freq(tea);
	return 0;
}

int snd_tea575x_s_hw_freq_seek(struct file *file, struct snd_tea575x *tea,
				const struct v4l2_hw_freq_seek *a)
{
	unsigned long timeout;
	int i, spacing;

	if (tea->cannot_read_data)
		return -ENOTTY;
	if (a->tuner || a->wrap_around)
		return -EINVAL;

	if (file->f_flags & O_NONBLOCK)
		return -EWOULDBLOCK;

	if (a->rangelow || a->rangehigh) {
		for (i = 0; i < ARRAY_SIZE(bands); i++) {
			if ((i == BAND_FM && tea->tea5759) ||
			    (i == BAND_FM_JAPAN && !tea->tea5759) ||
			    (i == BAND_AM && !tea->has_am))
				continue;
			if (bands[i].rangelow  == a->rangelow &&
			    bands[i].rangehigh == a->rangehigh)
				break;
		}
		if (i == ARRAY_SIZE(bands))
			return -EINVAL; /* No matching band found */
		if (i != tea->band) {
			tea->band = i;
			tea->freq = clamp(tea->freq, bands[i].rangelow,
						     bands[i].rangehigh);
			snd_tea575x_set_freq(tea);
		}
	}

	spacing = (tea->band == BAND_AM) ? 5 : 50; /* kHz */

	/* clear the frequency, HW will fill it in */
	tea->val &= ~TEA575X_BIT_FREQ_MASK;
	tea->val |= TEA575X_BIT_SEARCH;
	if (a->seek_upward)
		tea->val |= TEA575X_BIT_UPDOWN;
	else
		tea->val &= ~TEA575X_BIT_UPDOWN;
	snd_tea575x_write(tea, tea->val);
	timeout = jiffies + msecs_to_jiffies(10000);
	for (;;) {
		if (time_after(jiffies, timeout))
			break;
		if (schedule_timeout_interruptible(msecs_to_jiffies(10))) {
			/* some signal arrived, stop search */
			tea->val &= ~TEA575X_BIT_SEARCH;
			snd_tea575x_set_freq(tea);
			return -ERESTARTSYS;
		}
		if (!(snd_tea575x_read(tea) & TEA575X_BIT_SEARCH)) {
			u32 freq;

			/* Found a frequency, wait until it can be read */
			for (i = 0; i < 100; i++) {
				msleep(10);
				freq = snd_tea575x_get_freq(tea);
				if (freq) /* available */
					break;
			}
			if (freq == 0) /* shouldn't happen */
				break;
			/*
			 * if we moved by less than the spacing, or in the
			 * wrong direction, continue seeking
			 */
			if (abs(tea->freq - freq) < 16 * spacing ||
					(a->seek_upward && freq < tea->freq) ||
					(!a->seek_upward && freq > tea->freq)) {
				snd_tea575x_write(tea, tea->val);
				continue;
			}
			tea->freq = freq;
			tea->val &= ~TEA575X_BIT_SEARCH;
			return 0;
		}
	}
	tea->val &= ~TEA575X_BIT_SEARCH;
	snd_tea575x_set_freq(tea);
	return -ENODATA;
}
EXPORT_SYMBOL(snd_tea575x_s_hw_freq_seek);

static int vidioc_s_hw_freq_seek(struct file *file, void *fh,
					const struct v4l2_hw_freq_seek *a)
{
	struct snd_tea575x *tea = video_drvdata(file);

	return snd_tea575x_s_hw_freq_seek(file, tea, a);
}

static int tea575x_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct snd_tea575x *tea = container_of(ctrl->handler, struct snd_tea575x, ctrl_handler);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		tea->mute = ctrl->val;
		snd_tea575x_set_freq(tea);
		return 0;
	}

	return -EINVAL;
}

static const struct v4l2_file_operations tea575x_fops = {
	.unlocked_ioctl	= video_ioctl2,
	.open           = v4l2_fh_open,
	.release        = v4l2_fh_release,
	.poll           = v4l2_ctrl_poll,
};

static const struct v4l2_ioctl_ops tea575x_ioctl_ops = {
	.vidioc_querycap    = vidioc_querycap,
	.vidioc_g_tuner     = vidioc_g_tuner,
	.vidioc_s_tuner     = vidioc_s_tuner,
	.vidioc_g_frequency = vidioc_g_frequency,
	.vidioc_s_frequency = vidioc_s_frequency,
	.vidioc_s_hw_freq_seek = vidioc_s_hw_freq_seek,
	.vidioc_enum_freq_bands = vidioc_enum_freq_bands,
	.vidioc_log_status  = v4l2_ctrl_log_status,
	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};

static const struct video_device tea575x_radio = {
	.ioctl_ops 	= &tea575x_ioctl_ops,
	.release        = video_device_release_empty,
};

static const struct v4l2_ctrl_ops tea575x_ctrl_ops = {
	.s_ctrl = tea575x_s_ctrl,
};


int snd_tea575x_hw_init(struct snd_tea575x *tea)
{
	tea->mute = true;

	/* Not all devices can or know how to read the data back.
	   Such devices can set cannot_read_data to true. */
	if (!tea->cannot_read_data) {
		snd_tea575x_write(tea, 0x55AA);
		if (snd_tea575x_read(tea) != 0x55AA)
			return -ENODEV;
	}

	tea->val = TEA575X_BIT_BAND_FM | TEA575X_BIT_SEARCH_5_28;
	tea->freq = 90500 * 16;		/* 90.5Mhz default */
	snd_tea575x_set_freq(tea);

	return 0;
}
EXPORT_SYMBOL(snd_tea575x_hw_init);

int snd_tea575x_init(struct snd_tea575x *tea, struct module *owner)
{
	int retval = snd_tea575x_hw_init(tea);

	if (retval)
		return retval;

	tea->vd = tea575x_radio;
	video_set_drvdata(&tea->vd, tea);
	mutex_init(&tea->mutex);
	strlcpy(tea->vd.name, tea->v4l2_dev->name, sizeof(tea->vd.name));
	tea->vd.lock = &tea->mutex;
	tea->vd.v4l2_dev = tea->v4l2_dev;
	tea->fops = tea575x_fops;
	tea->fops.owner = owner;
	tea->vd.fops = &tea->fops;
	/* disable hw_freq_seek if we can't use it */
	if (tea->cannot_read_data)
		v4l2_disable_ioctl(&tea->vd, VIDIOC_S_HW_FREQ_SEEK);

	if (!tea->cannot_mute) {
		tea->vd.ctrl_handler = &tea->ctrl_handler;
		v4l2_ctrl_handler_init(&tea->ctrl_handler, 1);
		v4l2_ctrl_new_std(&tea->ctrl_handler, &tea575x_ctrl_ops,
				  V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
		retval = tea->ctrl_handler.error;
		if (retval) {
			v4l2_err(tea->v4l2_dev, "can't initialize controls\n");
			v4l2_ctrl_handler_free(&tea->ctrl_handler);
			return retval;
		}

		if (tea->ext_init) {
			retval = tea->ext_init(tea);
			if (retval) {
				v4l2_ctrl_handler_free(&tea->ctrl_handler);
				return retval;
			}
		}

		v4l2_ctrl_handler_setup(&tea->ctrl_handler);
	}

	retval = video_register_device(&tea->vd, VFL_TYPE_RADIO, tea->radio_nr);
	if (retval) {
		v4l2_err(tea->v4l2_dev, "can't register video device!\n");
		v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
		return retval;
	}

	return 0;
}

void snd_tea575x_exit(struct snd_tea575x *tea)
{
	video_unregister_device(&tea->vd);
	v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
}

static int __init alsa_tea575x_module_init(void)
{
	return 0;
}

static void __exit alsa_tea575x_module_exit(void)
{
}

module_init(alsa_tea575x_module_init)
module_exit(alsa_tea575x_module_exit)

EXPORT_SYMBOL(snd_tea575x_init);
EXPORT_SYMBOL(snd_tea575x_exit);
EXPORT_SYMBOL(snd_tea575x_set_freq);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips
	3	*
c1017a4c	4	* Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
1da177e4 LT	5	*
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*
4b29631d	21	*/
1da177e4	22
1da177e4	23	#include <linux/delay.h>
da155d5b	24	#include <linux/module.h>
1da177e4	25	#include <linux/init.h>
5a0e3ad6	26	#include <linux/slab.h>
d4ecc83b	27	#include <linux/sched.h>
eab924d0	28	#include <asm/io.h>
d4ecc83b	29	#include <media/v4l2-device.h>
4522e825	30	#include <media/v4l2-dev.h>
d4ecc83b	31	#include <media/v4l2-fh.h>
4522e825	32	#include <media/v4l2-ioctl.h>
d4ecc83b	33	#include <media/v4l2-event.h>
59b56459	34	#include <media/tea575x.h>
1da177e4	35
c1017a4c	36	MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
1da177e4 LT	37	MODULE_DESCRIPTION("Routines for control of TEA5757/5759 Philips AM/FM radio tuner chips");
	38	MODULE_LICENSE("GPL");
	39
	40	/*
	41	* definitions
	42	*/
	43
	44	#define TEA575X_BIT_SEARCH (1<<24) /* 1 = search action, 0 = tuned */
	45	#define TEA575X_BIT_UPDOWN (1<<23) /* 0 = search down, 1 = search up */
	46	#define TEA575X_BIT_MONO (1<<22) /* 0 = stereo, 1 = mono */
	47	#define TEA575X_BIT_BAND_MASK (3<<20)
	48	#define TEA575X_BIT_BAND_FM (0<<20)
	49	#define TEA575X_BIT_BAND_MW (1<<20)
fc488517 HG	50	#define TEA575X_BIT_BAND_LW (2<<20)
fc488517 HG	51	#define TEA575X_BIT_BAND_SW (3<<20)
1da177e4 LT	52	#define TEA575X_BIT_PORT_0 (1<<19) /* user bit */
	53	#define TEA575X_BIT_PORT_1 (1<<18) /* user bit */
	54	#define TEA575X_BIT_SEARCH_MASK (3<<16) /* search level */
	55	#define TEA575X_BIT_SEARCH_5_28 (0<<16) /* FM >5uV, AM >28uV */
	56	#define TEA575X_BIT_SEARCH_10_40 (1<<16) /* FM >10uV, AM > 40uV */
	57	#define TEA575X_BIT_SEARCH_30_63 (2<<16) /* FM >30uV, AM > 63uV */
	58	#define TEA575X_BIT_SEARCH_150_1000 (3<<16) /* FM > 150uV, AM > 1000uV */
	59	#define TEA575X_BIT_DUMMY (1<<15) /* buffer */
	60	#define TEA575X_BIT_FREQ_MASK 0x7fff
	61
fc488517 HG	62	enum { BAND_FM, BAND_FM_JAPAN, BAND_AM };
	63
	64	static const struct v4l2_frequency_band bands[] = {
	65	{
	66	.type = V4L2_TUNER_RADIO,
	67	.index = 0,
	68	.capability = V4L2_TUNER_CAP_LOW \| V4L2_TUNER_CAP_STEREO \|
	69	V4L2_TUNER_CAP_FREQ_BANDS,
	70	.rangelow = 87500 * 16,
	71	.rangehigh = 108000 * 16,
	72	.modulation = V4L2_BAND_MODULATION_FM,
	73	},
	74	{
	75	.type = V4L2_TUNER_RADIO,
	76	.index = 0,
	77	.capability = V4L2_TUNER_CAP_LOW \| V4L2_TUNER_CAP_STEREO \|
	78	V4L2_TUNER_CAP_FREQ_BANDS,
	79	.rangelow = 76000 * 16,
	80	.rangehigh = 91000 * 16,
	81	.modulation = V4L2_BAND_MODULATION_FM,
	82	},
	83	{
	84	.type = V4L2_TUNER_RADIO,
	85	.index = 1,
	86	.capability = V4L2_TUNER_CAP_LOW \| V4L2_TUNER_CAP_FREQ_BANDS,
	87	.rangelow = 530 * 16,
	88	.rangehigh = 1710 * 16,
	89	.modulation = V4L2_BAND_MODULATION_AM,
	90	},
	91	};
	92
1da177e4 LT	93	/*
	94	* lowlevel part
	95	*/
	96
14219d06 OZ	97	static void snd_tea575x_write(struct snd_tea575x *tea, unsigned int val)
	98	{
	99	u16 l;
	100	u8 data;
	101
31a62d41 HG	102	if (tea->ops->write_val)
	103	return tea->ops->write_val(tea, val);
	104
14219d06 OZ	105	tea->ops->set_direction(tea, 1);
	106	udelay(16);
	107
	108	for (l = 25; l > 0; l--) {
	109	data = (val >> 24) & TEA575X_DATA;
	110	val <<= 1; /* shift data */
	111	tea->ops->set_pins(tea, data \| TEA575X_WREN);
	112	udelay(2);
	113	tea->ops->set_pins(tea, data \| TEA575X_WREN \| TEA575X_CLK);
	114	udelay(2);
	115	tea->ops->set_pins(tea, data \| TEA575X_WREN);
	116	udelay(2);
	117	}
	118
	119	if (!tea->mute)
	120	tea->ops->set_pins(tea, 0);
	121	}
	122
bc2b395c	123	static u32 snd_tea575x_read(struct snd_tea575x *tea)
14219d06 OZ	124	{
	125	u16 l, rdata;
	126	u32 data = 0;
	127
31a62d41 HG	128	if (tea->ops->read_val)
	129	return tea->ops->read_val(tea);
	130
14219d06 OZ	131	tea->ops->set_direction(tea, 0);
	132	tea->ops->set_pins(tea, 0);
	133	udelay(16);
	134
	135	for (l = 24; l--;) {
	136	tea->ops->set_pins(tea, TEA575X_CLK);
	137	udelay(2);
	138	if (!l)
	139	tea->tuned = tea->ops->get_pins(tea) & TEA575X_MOST ? 0 : 1;
	140	tea->ops->set_pins(tea, 0);
	141	udelay(2);
	142	data <<= 1; /* shift data */
	143	rdata = tea->ops->get_pins(tea);
	144	if (!l)
	145	tea->stereo = (rdata & TEA575X_MOST) ? 0 : 1;
	146	if (rdata & TEA575X_DATA)
	147	data++;
	148	udelay(2);
	149	}
	150
	151	if (tea->mute)
	152	tea->ops->set_pins(tea, TEA575X_WREN);
	153
	154	return data;
	155	}
	156
40e006ae	157	static u32 snd_tea575x_val_to_freq(struct snd_tea575x *tea, u32 val)
bc2b395c	158	{
40e006ae	159	u32 freq = val & TEA575X_BIT_FREQ_MASK;
bc2b395c HV	160
	161	if (freq == 0)
	162	return freq;
	163
fc488517 HG	164	switch (tea->band) {
	165	case BAND_FM:
	166	/* freq = 12.5 /
	167	freq *= 125;
	168	freq /= 10;
	169	/* crystal fixup */
bc2b395c	170	freq -= TEA575X_FMIF;
fc488517 HG	171	break;
	172	case BAND_FM_JAPAN:
	173	/* freq = 12.5 /
	174	freq *= 125;
	175	freq /= 10;
	176	/* crystal fixup */
	177	freq += TEA575X_FMIF;
	178	break;
	179	case BAND_AM:
	180	/* crystal fixup */
	181	freq -= TEA575X_AMIF;
	182	break;
	183	}
bc2b395c	184
fc488517 HG	185	return clamp(freq * 16, bands[tea->band].rangelow,
fc488517 HG	186	bands[tea->band].rangehigh); /* from kHz */
bc2b395c HV	187	}
bc2b395c HV	188
40e006ae HG	189	static u32 snd_tea575x_get_freq(struct snd_tea575x *tea)
	190	{
	191	return snd_tea575x_val_to_freq(tea, snd_tea575x_read(tea));
	192	}
	193
559c2009	194	void snd_tea575x_set_freq(struct snd_tea575x *tea)
1da177e4	195	{
fc488517 HG	196	u32 freq = tea->freq / 16; /* to kHz */
fc488517 HG	197	u32 band = 0;
1da177e4	198
fc488517 HG	199	switch (tea->band) {
	200	case BAND_FM:
	201	band = TEA575X_BIT_BAND_FM;
	202	/* crystal fixup */
ea27316e	203	freq += TEA575X_FMIF;
fc488517 HG	204	/* freq /= 12.5 */
	205	freq *= 10;
	206	freq /= 125;
	207	break;
	208	case BAND_FM_JAPAN:
	209	band = TEA575X_BIT_BAND_FM;
	210	/* crystal fixup */
	211	freq -= TEA575X_FMIF;
	212	/* freq /= 12.5 */
	213	freq *= 10;
	214	freq /= 125;
	215	break;
	216	case BAND_AM:
	217	band = TEA575X_BIT_BAND_MW;
	218	/* crystal fixup */
	219	freq += TEA575X_AMIF;
	220	break;
	221	}
1da177e4	222
fc488517 HG	223	tea->val &= ~(TEA575X_BIT_FREQ_MASK \| TEA575X_BIT_BAND_MASK);
fc488517 HG	224	tea->val \|= band;
1da177e4	225	tea->val \|= freq & TEA575X_BIT_FREQ_MASK;
14219d06	226	snd_tea575x_write(tea, tea->val);
40e006ae	227	tea->freq = snd_tea575x_val_to_freq(tea, tea->val);
1da177e4 LT	228	}
	229
	230	/*
	231	* Linux Video interface
	232	*/
	233
9b76ede4 MCC	234	static int vidioc_querycap(struct file file, void priv,
9b76ede4 MCC	235	struct v4l2_capability *v)
1da177e4	236	{
c170ecf4	237	struct snd_tea575x *tea = video_drvdata(file);
9b76ede4	238
d4ecc83b	239	strlcpy(v->driver, tea->v4l2_dev->name, sizeof(v->driver));
10ca7201 OZ	240	strlcpy(v->card, tea->card, sizeof(v->card));
	241	strlcat(v->card, tea->tea5759 ? " TEA5759" : " TEA5757", sizeof(v->card));
	242	strlcpy(v->bus_info, tea->bus_info, sizeof(v->bus_info));
d4ecc83b HV	243	v->device_caps = V4L2_CAP_TUNER \| V4L2_CAP_RADIO;
	244	if (!tea->cannot_read_data)
	245	v->device_caps \|= V4L2_CAP_HW_FREQ_SEEK;
	246	v->capabilities = v->device_caps \| V4L2_CAP_DEVICE_CAPS;
9b76ede4 MCC	247	return 0;
	248	}
	249
6994ca3d OZ	250	int snd_tea575x_enum_freq_bands(struct snd_tea575x *tea,
6994ca3d OZ	251	struct v4l2_frequency_band *band)
fc488517	252	{
fc488517 HG	253	int index;
	254
	255	if (band->tuner != 0)
	256	return -EINVAL;
	257
	258	switch (band->index) {
	259	case 0:
	260	if (tea->tea5759)
	261	index = BAND_FM_JAPAN;
	262	else
	263	index = BAND_FM;
	264	break;
	265	case 1:
	266	if (tea->has_am) {
	267	index = BAND_AM;
	268	break;
	269	}
	270	/* Fall through */
	271	default:
	272	return -EINVAL;
	273	}
	274
	275	*band = bands[index];
	276	if (!tea->cannot_read_data)
	277	band->capability \|= V4L2_TUNER_CAP_HWSEEK_BOUNDED;
	278
	279	return 0;
	280	}
6994ca3d	281	EXPORT_SYMBOL(snd_tea575x_enum_freq_bands);
fc488517	282
6994ca3d OZ	283	static int vidioc_enum_freq_bands(struct file file, void priv,
6994ca3d OZ	284	struct v4l2_frequency_band *band)
9b76ede4	285	{
375d1358	286	struct snd_tea575x *tea = video_drvdata(file);
6994ca3d OZ	287
	288	return snd_tea575x_enum_freq_bands(tea, band);
	289	}
	290
	291	int snd_tea575x_g_tuner(struct snd_tea575x tea, struct v4l2_tuner v)
	292	{
fc488517	293	struct v4l2_frequency_band band_fm = { 0, };
375d1358	294
9b76ede4 MCC	295	if (v->index > 0)
	296	return -EINVAL;
	297
14219d06	298	snd_tea575x_read(tea);
6994ca3d	299	snd_tea575x_enum_freq_bands(tea, &band_fm);
375d1358	300
fc488517 HG	301	memset(v, 0, sizeof(*v));
fc488517 HG	302	strlcpy(v->name, tea->has_am ? "FM/AM" : "FM", sizeof(v->name));
9b76ede4	303	v->type = V4L2_TUNER_RADIO;
fc488517 HG	304	v->capability = band_fm.capability;
	305	v->rangelow = tea->has_am ? bands[BAND_AM].rangelow : band_fm.rangelow;
	306	v->rangehigh = band_fm.rangehigh;
d4ecc83b HV	307	v->rxsubchans = tea->stereo ? V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
	308	v->audmode = (tea->val & TEA575X_BIT_MONO) ?
	309	V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO;
375d1358	310	v->signal = tea->tuned ? 0xffff : 0;
9b76ede4 MCC	311	return 0;
9b76ede4 MCC	312	}
6994ca3d OZ	313	EXPORT_SYMBOL(snd_tea575x_g_tuner);
	314
	315	static int vidioc_g_tuner(struct file file, void priv,
	316	struct v4l2_tuner *v)
	317	{
	318	struct snd_tea575x *tea = video_drvdata(file);
	319
	320	return snd_tea575x_g_tuner(tea, v);
	321	}
9b76ede4 MCC	322
9b76ede4 MCC	323	static int vidioc_s_tuner(struct file file, void priv,
2f73c7c5	324	const struct v4l2_tuner *v)
9b76ede4	325	{
d4ecc83b	326	struct snd_tea575x *tea = video_drvdata(file);
fc488517	327	u32 orig_val = tea->val;
d4ecc83b HV	328
d4ecc83b HV	329	if (v->index)
9b76ede4	330	return -EINVAL;
d4ecc83b HV	331	tea->val &= ~TEA575X_BIT_MONO;
	332	if (v->audmode == V4L2_TUNER_MODE_MONO)
	333	tea->val \|= TEA575X_BIT_MONO;
fc488517 HG	334	/* Only apply changes if currently tuning FM */
	335	if (tea->band != BAND_AM && tea->val != orig_val)
	336	snd_tea575x_set_freq(tea);
	337
9b76ede4 MCC	338	return 0;
	339	}
	340
	341	static int vidioc_g_frequency(struct file file, void priv,
	342	struct v4l2_frequency *f)
	343	{
	344	struct snd_tea575x *tea = video_drvdata(file);
	345
375d1358 OZ	346	if (f->tuner != 0)
375d1358 OZ	347	return -EINVAL;
9b76ede4 MCC	348	f->type = V4L2_TUNER_RADIO;
	349	f->frequency = tea->freq;
	350	return 0;
	351	}
	352
	353	static int vidioc_s_frequency(struct file file, void priv,
b530a447	354	const struct v4l2_frequency *f)
9b76ede4 MCC	355	{
	356	struct snd_tea575x *tea = video_drvdata(file);
	357
375d1358 OZ	358	if (f->tuner != 0 \|\| f->type != V4L2_TUNER_RADIO)
	359	return -EINVAL;
	360
fc488517 HG	361	if (tea->has_am && f->frequency < (20000 * 16))
	362	tea->band = BAND_AM;
	363	else if (tea->tea5759)
	364	tea->band = BAND_FM_JAPAN;
	365	else
	366	tea->band = BAND_FM;
	367
b530a447	368	tea->freq = clamp_t(u32, f->frequency, bands[tea->band].rangelow,
fc488517	369	bands[tea->band].rangehigh);
9b76ede4	370	snd_tea575x_set_freq(tea);
9b76ede4 MCC	371	return 0;
	372	}
	373
6994ca3d OZ	374	int snd_tea575x_s_hw_freq_seek(struct file file, struct snd_tea575x tea,
6994ca3d OZ	375	const struct v4l2_hw_freq_seek *a)
9b76ede4	376	{
bc2b395c	377	unsigned long timeout;
fc488517	378	int i, spacing;
9b76ede4	379
d4ecc83b HV	380	if (tea->cannot_read_data)
	381	return -ENOTTY;
	382	if (a->tuner \|\| a->wrap_around)
9b76ede4	383	return -EINVAL;
bc2b395c	384
617ade61 HV	385	if (file->f_flags & O_NONBLOCK)
	386	return -EWOULDBLOCK;
	387
fc488517 HG	388	if (a->rangelow \|\| a->rangehigh) {
	389	for (i = 0; i < ARRAY_SIZE(bands); i++) {
	390	if ((i == BAND_FM && tea->tea5759) \|\|
	391	(i == BAND_FM_JAPAN && !tea->tea5759) \|\|
	392	(i == BAND_AM && !tea->has_am))
	393	continue;
	394	if (bands[i].rangelow == a->rangelow &&
	395	bands[i].rangehigh == a->rangehigh)
	396	break;
	397	}
	398	if (i == ARRAY_SIZE(bands))
	399	return -EINVAL; /* No matching band found */
	400	if (i != tea->band) {
	401	tea->band = i;
	402	tea->freq = clamp(tea->freq, bands[i].rangelow,
	403	bands[i].rangehigh);
	404	snd_tea575x_set_freq(tea);
	405	}
	406	}
	407
	408	spacing = (tea->band == BAND_AM) ? 5 : 50; /* kHz */
	409
bc2b395c HV	410	/* clear the frequency, HW will fill it in */
bc2b395c HV	411	tea->val &= ~TEA575X_BIT_FREQ_MASK;
d4ecc83b	412	tea->val \|= TEA575X_BIT_SEARCH;
d4ecc83b HV	413	if (a->seek_upward)
d4ecc83b HV	414	tea->val \|= TEA575X_BIT_UPDOWN;
bc2b395c HV	415	else
bc2b395c HV	416	tea->val &= ~TEA575X_BIT_UPDOWN;
d4ecc83b	417	snd_tea575x_write(tea, tea->val);
bc2b395c	418	timeout = jiffies + msecs_to_jiffies(10000);
d4ecc83b	419	for (;;) {
bc2b395c HV	420	if (time_after(jiffies, timeout))
bc2b395c HV	421	break;
d4ecc83b HV	422	if (schedule_timeout_interruptible(msecs_to_jiffies(10))) {
	423	/* some signal arrived, stop search */
	424	tea->val &= ~TEA575X_BIT_SEARCH;
bc2b395c	425	snd_tea575x_set_freq(tea);
d4ecc83b HV	426	return -ERESTARTSYS;
d4ecc83b HV	427	}
bc2b395c HV	428	if (!(snd_tea575x_read(tea) & TEA575X_BIT_SEARCH)) {
	429	u32 freq;
	430
	431	/* Found a frequency, wait until it can be read */
	432	for (i = 0; i < 100; i++) {
	433	msleep(10);
	434	freq = snd_tea575x_get_freq(tea);
	435	if (freq) /* available */
	436	break;
	437	}
	438	if (freq == 0) /* shouldn't happen */
	439	break;
	440	/*
fc488517 HG	441	* if we moved by less than the spacing, or in the
fc488517 HG	442	* wrong direction, continue seeking
bc2b395c	443	*/
fc488517	444	if (abs(tea->freq - freq) < 16 * spacing \|\|
bc2b395c HV	445	(a->seek_upward && freq < tea->freq) \|\|
	446	(!a->seek_upward && freq > tea->freq)) {
	447	snd_tea575x_write(tea, tea->val);
	448	continue;
	449	}
	450	tea->freq = freq;
	451	tea->val &= ~TEA575X_BIT_SEARCH;
	452	return 0;
	453	}
d4ecc83b	454	}
bc2b395c HV	455	tea->val &= ~TEA575X_BIT_SEARCH;
bc2b395c HV	456	snd_tea575x_set_freq(tea);
54f6019b	457	return -ENODATA;
9b76ede4	458	}
6994ca3d OZ	459	EXPORT_SYMBOL(snd_tea575x_s_hw_freq_seek);
	460
	461	static int vidioc_s_hw_freq_seek(struct file file, void fh,
	462	const struct v4l2_hw_freq_seek *a)
	463	{
	464	struct snd_tea575x *tea = video_drvdata(file);
	465
	466	return snd_tea575x_s_hw_freq_seek(file, tea, a);
	467	}
9b76ede4	468
4522e825	469	static int tea575x_s_ctrl(struct v4l2_ctrl *ctrl)
9b76ede4	470	{
4522e825	471	struct snd_tea575x *tea = container_of(ctrl->handler, struct snd_tea575x, ctrl_handler);
9b76ede4 MCC	472
	473	switch (ctrl->id) {
	474	case V4L2_CID_AUDIO_MUTE:
4522e825 OZ	475	tea->mute = ctrl->val;
4522e825 OZ	476	snd_tea575x_set_freq(tea);
14219d06	477	return 0;
9b76ede4	478	}
9b76ede4	479
9b76ede4 MCC	480	return -EINVAL;
	481	}
	482
9b76ede4	483	static const struct v4l2_file_operations tea575x_fops = {
6a529c1a	484	.unlocked_ioctl = video_ioctl2,
d4ecc83b HV	485	.open = v4l2_fh_open,
	486	.release = v4l2_fh_release,
	487	.poll = v4l2_ctrl_poll,
9b76ede4 MCC	488	};
	489
	490	static const struct v4l2_ioctl_ops tea575x_ioctl_ops = {
	491	.vidioc_querycap = vidioc_querycap,
	492	.vidioc_g_tuner = vidioc_g_tuner,
	493	.vidioc_s_tuner = vidioc_s_tuner,
9b76ede4 MCC	494	.vidioc_g_frequency = vidioc_g_frequency,
9b76ede4 MCC	495	.vidioc_s_frequency = vidioc_s_frequency,
d4ecc83b	496	.vidioc_s_hw_freq_seek = vidioc_s_hw_freq_seek,
fc488517	497	.vidioc_enum_freq_bands = vidioc_enum_freq_bands,
d4ecc83b HV	498	.vidioc_log_status = v4l2_ctrl_log_status,
	499	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
	500	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
9b76ede4 MCC	501	};
9b76ede4 MCC	502
d4ecc83b	503	static const struct video_device tea575x_radio = {
9b76ede4	504	.ioctl_ops = &tea575x_ioctl_ops,
d4ecc83b	505	.release = video_device_release_empty,
4522e825 OZ	506	};
	507
	508	static const struct v4l2_ctrl_ops tea575x_ctrl_ops = {
	509	.s_ctrl = tea575x_s_ctrl,
9b76ede4 MCC	510	};
9b76ede4 MCC	511
1da177e4	512
8fd79579 OZ	513	int snd_tea575x_hw_init(struct snd_tea575x *tea)
8fd79579 OZ	514	{
d4ecc83b	515	tea->mute = true;
14219d06	516
d4ecc83b HV	517	/* Not all devices can or know how to read the data back.
	518	Such devices can set cannot_read_data to true. */
	519	if (!tea->cannot_read_data) {
	520	snd_tea575x_write(tea, 0x55AA);
	521	if (snd_tea575x_read(tea) != 0x55AA)
	522	return -ENODEV;
	523	}
1da177e4	524
bc2b395c	525	tea->val = TEA575X_BIT_BAND_FM \| TEA575X_BIT_SEARCH_5_28;
9b76ede4	526	tea->freq = 90500 * 16; /* 90.5Mhz default */
4522e825	527	snd_tea575x_set_freq(tea);
9b76ede4	528
8fd79579 OZ	529	return 0;
	530	}
	531	EXPORT_SYMBOL(snd_tea575x_hw_init);
	532
	533	int snd_tea575x_init(struct snd_tea575x tea, struct module owner)
	534	{
	535	int retval = snd_tea575x_hw_init(tea);
	536
	537	if (retval)
	538	return retval;
	539
4522e825 OZ	540	tea->vd = tea575x_radio;
4522e825 OZ	541	video_set_drvdata(&tea->vd, tea);
6a529c1a	542	mutex_init(&tea->mutex);
d4ecc83b	543	strlcpy(tea->vd.name, tea->v4l2_dev->name, sizeof(tea->vd.name));
6a529c1a	544	tea->vd.lock = &tea->mutex;
d4ecc83b	545	tea->vd.v4l2_dev = tea->v4l2_dev;
5daf53a6 HG	546	tea->fops = tea575x_fops;
	547	tea->fops.owner = owner;
	548	tea->vd.fops = &tea->fops;
65397995 HV	549	/* disable hw_freq_seek if we can't use it */
65397995 HV	550	if (tea->cannot_read_data)
152a3a73	551	v4l2_disable_ioctl(&tea->vd, VIDIOC_S_HW_FREQ_SEEK);
1da177e4	552
3d0fe51c HG	553	if (!tea->cannot_mute) {
	554	tea->vd.ctrl_handler = &tea->ctrl_handler;
	555	v4l2_ctrl_handler_init(&tea->ctrl_handler, 1);
	556	v4l2_ctrl_new_std(&tea->ctrl_handler, &tea575x_ctrl_ops,
	557	V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
	558	retval = tea->ctrl_handler.error;
4522e825	559	if (retval) {
3d0fe51c	560	v4l2_err(tea->v4l2_dev, "can't initialize controls\n");
4522e825 OZ	561	v4l2_ctrl_handler_free(&tea->ctrl_handler);
	562	return retval;
	563	}
9b76ede4	564
3d0fe51c HG	565	if (tea->ext_init) {
	566	retval = tea->ext_init(tea);
	567	if (retval) {
	568	v4l2_ctrl_handler_free(&tea->ctrl_handler);
	569	return retval;
	570	}
	571	}
	572
	573	v4l2_ctrl_handler_setup(&tea->ctrl_handler);
	574	}
9b76ede4	575
d4ecc83b	576	retval = video_register_device(&tea->vd, VFL_TYPE_RADIO, tea->radio_nr);
9b76ede4	577	if (retval) {
d4ecc83b	578	v4l2_err(tea->v4l2_dev, "can't register video device!\n");
3d0fe51c	579	v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
14219d06	580	return retval;
9b76ede4	581	}
1da177e4	582
14219d06	583	return 0;
1da177e4 LT	584	}
1da177e4 LT	585
97f02e05	586	void snd_tea575x_exit(struct snd_tea575x *tea)
1da177e4	587	{
4522e825	588	video_unregister_device(&tea->vd);
3d0fe51c	589	v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
1da177e4 LT	590	}
	591
	592	static int __init alsa_tea575x_module_init(void)
	593	{
	594	return 0;
	595	}
4b29631d	596
1da177e4 LT	597	static void __exit alsa_tea575x_module_exit(void)
	598	{
	599	}
4b29631d	600
1da177e4 LT	601	module_init(alsa_tea575x_module_init)
	602	module_exit(alsa_tea575x_module_exit)
	603
	604	EXPORT_SYMBOL(snd_tea575x_init);
	605	EXPORT_SYMBOL(snd_tea575x_exit);
559c2009	606	EXPORT_SYMBOL(snd_tea575x_set_freq);