Initial import

1 files changed, 602 insertions, 0 deletions

diff --git a/drivers/media/radio/radio-tea5777.c b/drivers/media/radio/radio-tea5777.c
new file mode 100644
index 000000000..83fe7ab35
--- /dev/null
+++ b/drivers/media/radio/radio-tea5777.c
@@ -0,0 +1,602 @@
+/*
+ *   v4l2 driver for TEA5777 Philips AM/FM radio tuner chips
+ *
+ *	Copyright (c) 2012 Hans de Goede <hdegoede@redhat.com>
+ *
+ *   Based on the 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/init.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/slab.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 "radio-tea5777.h"
+
+MODULE_AUTHOR("Hans de Goede <perex@perex.cz>");
+MODULE_DESCRIPTION("Routines for control of TEA5777 Philips AM/FM radio tuner chips");
+MODULE_LICENSE("GPL");
+
+#define TEA5777_FM_IF			150 /* kHz */
+#define TEA5777_FM_FREQ_STEP		50  /* kHz */
+
+#define TEA5777_AM_IF			21  /* kHz */
+#define TEA5777_AM_FREQ_STEP		1   /* kHz */
+
+/* Write reg, common bits */
+#define TEA5777_W_MUTE_MASK		(1LL << 47)
+#define TEA5777_W_MUTE_SHIFT		47
+#define TEA5777_W_AM_FM_MASK		(1LL << 46)
+#define TEA5777_W_AM_FM_SHIFT		46
+#define TEA5777_W_STB_MASK		(1LL << 45)
+#define TEA5777_W_STB_SHIFT		45
+
+#define TEA5777_W_IFCE_MASK		(1LL << 29)
+#define TEA5777_W_IFCE_SHIFT		29
+#define TEA5777_W_IFW_MASK		(1LL << 28)
+#define TEA5777_W_IFW_SHIFT		28
+#define TEA5777_W_HILO_MASK		(1LL << 27)
+#define TEA5777_W_HILO_SHIFT		27
+#define TEA5777_W_DBUS_MASK		(1LL << 26)
+#define TEA5777_W_DBUS_SHIFT		26
+
+#define TEA5777_W_INTEXT_MASK		(1LL << 24)
+#define TEA5777_W_INTEXT_SHIFT		24
+#define TEA5777_W_P1_MASK		(1LL << 23)
+#define TEA5777_W_P1_SHIFT		23
+#define TEA5777_W_P0_MASK		(1LL << 22)
+#define TEA5777_W_P0_SHIFT		22
+#define TEA5777_W_PEN1_MASK		(1LL << 21)
+#define TEA5777_W_PEN1_SHIFT		21
+#define TEA5777_W_PEN0_MASK		(1LL << 20)
+#define TEA5777_W_PEN0_SHIFT		20
+
+#define TEA5777_W_CHP0_MASK		(1LL << 18)
+#define TEA5777_W_CHP0_SHIFT		18
+#define TEA5777_W_DEEM_MASK		(1LL << 17)
+#define TEA5777_W_DEEM_SHIFT		17
+
+#define TEA5777_W_SEARCH_MASK		(1LL << 7)
+#define TEA5777_W_SEARCH_SHIFT		7
+#define TEA5777_W_PROGBLIM_MASK		(1LL << 6)
+#define TEA5777_W_PROGBLIM_SHIFT	6
+#define TEA5777_W_UPDWN_MASK		(1LL << 5)
+#define TEA5777_W_UPDWN_SHIFT		5
+#define TEA5777_W_SLEV_MASK		(3LL << 3)
+#define TEA5777_W_SLEV_SHIFT		3
+
+/* Write reg, FM specific bits */
+#define TEA5777_W_FM_PLL_MASK		(0x1fffLL << 32)
+#define TEA5777_W_FM_PLL_SHIFT		32
+#define TEA5777_W_FM_FREF_MASK		(0x03LL << 30)
+#define TEA5777_W_FM_FREF_SHIFT		30
+#define TEA5777_W_FM_FREF_VALUE		0LL /* 50k steps, 150k IF */
+
+#define TEA5777_W_FM_FORCEMONO_MASK	(1LL << 15)
+#define TEA5777_W_FM_FORCEMONO_SHIFT	15
+#define TEA5777_W_FM_SDSOFF_MASK	(1LL << 14)
+#define TEA5777_W_FM_SDSOFF_SHIFT	14
+#define TEA5777_W_FM_DOFF_MASK		(1LL << 13)
+#define TEA5777_W_FM_DOFF_SHIFT		13
+
+#define TEA5777_W_FM_STEP_MASK		(3LL << 1)
+#define TEA5777_W_FM_STEP_SHIFT		1
+
+/* Write reg, AM specific bits */
+#define TEA5777_W_AM_PLL_MASK		(0x7ffLL << 34)
+#define TEA5777_W_AM_PLL_SHIFT		34
+#define TEA5777_W_AM_AGCRF_MASK		(1LL << 33)
+#define TEA5777_W_AM_AGCRF_SHIFT	33
+#define TEA5777_W_AM_AGCIF_MASK		(1LL << 32)
+#define TEA5777_W_AM_AGCIF_SHIFT	32
+#define TEA5777_W_AM_MWLW_MASK		(1LL << 31)
+#define TEA5777_W_AM_MWLW_SHIFT		31
+#define TEA5777_W_AM_LW			0LL
+#define TEA5777_W_AM_MW			1LL
+#define TEA5777_W_AM_LNA_MASK		(1LL << 30)
+#define TEA5777_W_AM_LNA_SHIFT		30
+
+#define TEA5777_W_AM_PEAK_MASK		(1LL << 25)
+#define TEA5777_W_AM_PEAK_SHIFT		25
+
+#define TEA5777_W_AM_RFB_MASK		(1LL << 16)
+#define TEA5777_W_AM_RFB_SHIFT		16
+#define TEA5777_W_AM_CALLIGN_MASK	(1LL << 15)
+#define TEA5777_W_AM_CALLIGN_SHIFT	15
+#define TEA5777_W_AM_CBANK_MASK		(0x7fLL << 8)
+#define TEA5777_W_AM_CBANK_SHIFT	8
+
+#define TEA5777_W_AM_DELAY_MASK		(1LL << 2)
+#define TEA5777_W_AM_DELAY_SHIFT	2
+#define TEA5777_W_AM_STEP_MASK		(1LL << 1)
+#define TEA5777_W_AM_STEP_SHIFT		1
+
+/* Read reg, common bits */
+#define TEA5777_R_LEVEL_MASK		(0x0f << 17)
+#define TEA5777_R_LEVEL_SHIFT		17
+#define TEA5777_R_SFOUND_MASK		(0x01 << 16)
+#define TEA5777_R_SFOUND_SHIFT		16
+#define TEA5777_R_BLIM_MASK		(0x01 << 15)
+#define TEA5777_R_BLIM_SHIFT		15
+
+/* Read reg, FM specific bits */
+#define TEA5777_R_FM_STEREO_MASK	(0x01 << 21)
+#define TEA5777_R_FM_STEREO_SHIFT	21
+#define TEA5777_R_FM_PLL_MASK		0x1fff
+#define TEA5777_R_FM_PLL_SHIFT		0
+
+enum { BAND_FM, 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 |
+			      V4L2_TUNER_CAP_HWSEEK_BOUNDED |
+			      V4L2_TUNER_CAP_HWSEEK_PROG_LIM,
+		.rangelow   =  76000 * 16,
+		.rangehigh  = 108000 * 16,
+		.modulation = V4L2_BAND_MODULATION_FM,
+	},
+	{
+		.type = V4L2_TUNER_RADIO,
+		.index = 1,
+		.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS |
+			      V4L2_TUNER_CAP_HWSEEK_BOUNDED |
+			      V4L2_TUNER_CAP_HWSEEK_PROG_LIM,
+		.rangelow   =  530 * 16,
+		.rangehigh  = 1710 * 16,
+		.modulation = V4L2_BAND_MODULATION_AM,
+	},
+};
+
+static u32 tea5777_freq_to_v4l2_freq(struct radio_tea5777 *tea, u32 freq)
+{
+	switch (tea->band) {
+	case BAND_FM:
+		return (freq * TEA5777_FM_FREQ_STEP + TEA5777_FM_IF) * 16;
+	case BAND_AM:
+		return (freq * TEA5777_AM_FREQ_STEP + TEA5777_AM_IF) * 16;
+	}
+	return 0; /* Never reached */
+}
+
+int radio_tea5777_set_freq(struct radio_tea5777 *tea)
+{
+	u32 freq;
+	int res;
+
+	freq = clamp(tea->freq, bands[tea->band].rangelow,
+				bands[tea->band].rangehigh);
+	freq = (freq + 8) / 16; /* to kHz */
+
+	switch (tea->band) {
+	case BAND_FM:
+		tea->write_reg &= ~TEA5777_W_AM_FM_MASK;
+		freq = (freq - TEA5777_FM_IF) / TEA5777_FM_FREQ_STEP;
+		tea->write_reg &= ~TEA5777_W_FM_PLL_MASK;
+		tea->write_reg |= (u64)freq << TEA5777_W_FM_PLL_SHIFT;
+		tea->write_reg &= ~TEA5777_W_FM_FREF_MASK;
+		tea->write_reg |= TEA5777_W_FM_FREF_VALUE <<
+				  TEA5777_W_FM_FREF_SHIFT;
+		tea->write_reg &= ~TEA5777_W_FM_FORCEMONO_MASK;
+		if (tea->audmode == V4L2_TUNER_MODE_MONO)
+			tea->write_reg |= 1LL << TEA5777_W_FM_FORCEMONO_SHIFT;
+		break;
+	case BAND_AM:
+		tea->write_reg &= ~TEA5777_W_AM_FM_MASK;
+		tea->write_reg |= (1LL << TEA5777_W_AM_FM_SHIFT);
+		freq = (freq - TEA5777_AM_IF) / TEA5777_AM_FREQ_STEP;
+		tea->write_reg &= ~TEA5777_W_AM_PLL_MASK;
+		tea->write_reg |= (u64)freq << TEA5777_W_AM_PLL_SHIFT;
+		tea->write_reg &= ~TEA5777_W_AM_AGCRF_MASK;
+		tea->write_reg &= ~TEA5777_W_AM_AGCRF_MASK;
+		tea->write_reg &= ~TEA5777_W_AM_MWLW_MASK;
+		tea->write_reg |= TEA5777_W_AM_MW << TEA5777_W_AM_MWLW_SHIFT;
+		tea->write_reg &= ~TEA5777_W_AM_LNA_MASK;
+		tea->write_reg |= 1LL << TEA5777_W_AM_LNA_SHIFT;
+		tea->write_reg &= ~TEA5777_W_AM_PEAK_MASK;
+		tea->write_reg |= 1LL << TEA5777_W_AM_PEAK_SHIFT;
+		tea->write_reg &= ~TEA5777_W_AM_CALLIGN_MASK;
+		break;
+	}
+
+	res = tea->ops->write_reg(tea, tea->write_reg);
+	if (res)
+		return res;
+
+	tea->needs_write = false;
+	tea->read_reg = -1;
+	tea->freq = tea5777_freq_to_v4l2_freq(tea, freq);
+
+	return 0;
+}
+
+static int radio_tea5777_update_read_reg(struct radio_tea5777 *tea, int wait)
+{
+	int res;
+
+	if (tea->read_reg != -1)
+		return 0;
+
+	if (tea->write_before_read && tea->needs_write) {
+		res = radio_tea5777_set_freq(tea);
+		if (res)
+			return res;
+	}
+
+	if (wait) {
+		if (schedule_timeout_interruptible(msecs_to_jiffies(wait)))
+			return -ERESTARTSYS;
+	}
+
+	res = tea->ops->read_reg(tea, &tea->read_reg);
+	if (res)
+		return res;
+
+	tea->needs_write = true;
+	return 0;
+}
+
+/*
+ * Linux Video interface
+ */
+
+static int vidioc_querycap(struct file *file, void  *priv,
+					struct v4l2_capability *v)
+{
+	struct radio_tea5777 *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, " TEA5777", sizeof(v->card));
+	strlcpy(v->bus_info, tea->bus_info, sizeof(v->bus_info));
+	v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
+	v->device_caps |= V4L2_CAP_HW_FREQ_SEEK;
+	v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
+	return 0;
+}
+
+static int vidioc_enum_freq_bands(struct file *file, void *priv,
+					 struct v4l2_frequency_band *band)
+{
+	struct radio_tea5777 *tea = video_drvdata(file);
+
+	if (band->tuner != 0 || band->index >= ARRAY_SIZE(bands) ||
+	    (!tea->has_am && band->index == BAND_AM))
+		return -EINVAL;
+
+	*band = bands[band->index];
+	return 0;
+}
+
+static int vidioc_g_tuner(struct file *file, void *priv,
+					struct v4l2_tuner *v)
+{
+	struct radio_tea5777 *tea = video_drvdata(file);
+	int res;
+
+	if (v->index > 0)
+		return -EINVAL;
+
+	res = radio_tea5777_update_read_reg(tea, 0);
+	if (res)
+		return res;
+
+	memset(v, 0, sizeof(*v));
+	if (tea->has_am)
+		strlcpy(v->name, "AM/FM", sizeof(v->name));
+	else
+		strlcpy(v->name, "FM", sizeof(v->name));
+	v->type = V4L2_TUNER_RADIO;
+	v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
+			V4L2_TUNER_CAP_FREQ_BANDS |
+			V4L2_TUNER_CAP_HWSEEK_BOUNDED |
+			V4L2_TUNER_CAP_HWSEEK_PROG_LIM;
+	v->rangelow   = tea->has_am ? bands[BAND_AM].rangelow :
+				      bands[BAND_FM].rangelow;
+	v->rangehigh  = bands[BAND_FM].rangehigh;
+	if (tea->band == BAND_FM &&
+			(tea->read_reg & TEA5777_R_FM_STEREO_MASK))
+		v->rxsubchans = V4L2_TUNER_SUB_STEREO;
+	else
+		v->rxsubchans = V4L2_TUNER_SUB_MONO;
+	v->audmode = tea->audmode;
+	/* shift - 12 to convert 4-bits (0-15) scale to 16-bits (0-65535) */
+	v->signal = (tea->read_reg & TEA5777_R_LEVEL_MASK) >>
+		    (TEA5777_R_LEVEL_SHIFT - 12);
+
+	/* Invalidate read_reg, so that next call we return up2date signal */
+	tea->read_reg = -1;
+
+	return 0;
+}
+
+static int vidioc_s_tuner(struct file *file, void *priv,
+					const struct v4l2_tuner *v)
+{
+	struct radio_tea5777 *tea = video_drvdata(file);
+	u32 orig_audmode = tea->audmode;
+
+	if (v->index)
+		return -EINVAL;
+
+	tea->audmode = v->audmode;
+	if (tea->audmode > V4L2_TUNER_MODE_STEREO)
+		tea->audmode = V4L2_TUNER_MODE_STEREO;
+
+	if (tea->audmode != orig_audmode && tea->band == BAND_FM)
+		return radio_tea5777_set_freq(tea);
+
+	return 0;
+}
+
+static int vidioc_g_frequency(struct file *file, void *priv,
+					struct v4l2_frequency *f)
+{
+	struct radio_tea5777 *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 radio_tea5777 *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
+		tea->band = BAND_FM;
+
+	tea->freq = f->frequency;
+	return radio_tea5777_set_freq(tea);
+}
+
+static int vidioc_s_hw_freq_seek(struct file *file, void *fh,
+					const struct v4l2_hw_freq_seek *a)
+{
+	struct radio_tea5777 *tea = video_drvdata(file);
+	unsigned long timeout;
+	u32 rangelow = a->rangelow;
+	u32 rangehigh = a->rangehigh;
+	int i, res, spacing;
+	u32 orig_freq;
+
+	if (a->tuner || a->wrap_around)
+		return -EINVAL;
+
+	if (file->f_flags & O_NONBLOCK)
+		return -EWOULDBLOCK;
+
+	if (rangelow || rangehigh) {
+		for (i = 0; i < ARRAY_SIZE(bands); i++) {
+			if (i == BAND_AM && !tea->has_am)
+				continue;
+			if (bands[i].rangelow  >= rangelow &&
+			    bands[i].rangehigh <= rangehigh)
+				break;
+		}
+		if (i == ARRAY_SIZE(bands))
+			return -EINVAL; /* No matching band found */
+
+		tea->band = i;
+		if (tea->freq < rangelow || tea->freq > rangehigh) {
+			tea->freq = clamp(tea->freq, rangelow,
+						     rangehigh);
+			res = radio_tea5777_set_freq(tea);
+			if (res)
+				return res;
+		}
+	} else {
+		rangelow  = bands[tea->band].rangelow;
+		rangehigh = bands[tea->band].rangehigh;
+	}
+
+	spacing   = (tea->band == BAND_AM) ? (5 * 16) : (200 * 16); /* kHz */
+	orig_freq = tea->freq;
+
+	tea->write_reg |= TEA5777_W_PROGBLIM_MASK;
+	if (tea->seek_rangelow != rangelow) {
+		tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
+		tea->freq = rangelow;
+		res = radio_tea5777_set_freq(tea);
+		if (res)
+			goto leave;
+		tea->seek_rangelow = rangelow;
+	}
+	if (tea->seek_rangehigh != rangehigh) {
+		tea->write_reg |= TEA5777_W_UPDWN_MASK;
+		tea->freq = rangehigh;
+		res = radio_tea5777_set_freq(tea);
+		if (res)
+			goto leave;
+		tea->seek_rangehigh = rangehigh;
+	}
+	tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
+
+	tea->write_reg |= TEA5777_W_SEARCH_MASK;
+	if (a->seek_upward) {
+		tea->write_reg |= TEA5777_W_UPDWN_MASK;
+		tea->freq = orig_freq + spacing;
+	} else {
+		tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
+		tea->freq = orig_freq - spacing;
+	}
+	res = radio_tea5777_set_freq(tea);
+	if (res)
+		goto leave;
+
+	timeout = jiffies + msecs_to_jiffies(5000);
+	for (;;) {
+		if (time_after(jiffies, timeout)) {
+			res = -ENODATA;
+			break;
+		}
+
+		res = radio_tea5777_update_read_reg(tea, 100);
+		if (res)
+			break;
+
+		/*
+		 * Note we use tea->freq to track how far we've searched sofar
+		 * this is necessary to ensure we continue seeking at the right
+		 * point, in the write_before_read case.
+		 */
+		tea->freq = (tea->read_reg & TEA5777_R_FM_PLL_MASK);
+		tea->freq = tea5777_freq_to_v4l2_freq(tea, tea->freq);
+
+		if ((tea->read_reg & TEA5777_R_SFOUND_MASK)) {
+			tea->write_reg &= ~TEA5777_W_SEARCH_MASK;
+			return 0;
+		}
+
+		if (tea->read_reg & TEA5777_R_BLIM_MASK) {
+			res = -ENODATA;
+			break;
+		}
+
+		/* Force read_reg update */
+		tea->read_reg = -1;
+	}
+leave:
+	tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
+	tea->write_reg &= ~TEA5777_W_SEARCH_MASK;
+	tea->freq = orig_freq;
+	radio_tea5777_set_freq(tea);
+	return res;
+}
+
+static int tea575x_s_ctrl(struct v4l2_ctrl *c)
+{
+	struct radio_tea5777 *tea =
+		container_of(c->handler, struct radio_tea5777, ctrl_handler);
+
+	switch (c->id) {
+	case V4L2_CID_AUDIO_MUTE:
+		if (c->val)
+			tea->write_reg |= TEA5777_W_MUTE_MASK;
+		else
+			tea->write_reg &= ~TEA5777_W_MUTE_MASK;
+
+		return radio_tea5777_set_freq(tea);
+	}
+
+	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 radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner)
+{
+	int res;
+
+	tea->write_reg = (1LL << TEA5777_W_IFCE_SHIFT) |
+			 (1LL << TEA5777_W_IFW_SHIFT) |
+			 (1LL << TEA5777_W_INTEXT_SHIFT) |
+			 (1LL << TEA5777_W_CHP0_SHIFT) |
+			 (1LL << TEA5777_W_SLEV_SHIFT);
+	tea->freq = 90500 * 16;	/* 90.5Mhz default */
+	tea->audmode = V4L2_TUNER_MODE_STEREO;
+	res = radio_tea5777_set_freq(tea);
+	if (res) {
+		v4l2_err(tea->v4l2_dev, "can't set initial freq (%d)\n", res);
+		return res;
+	}
+
+	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;
+
+	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);
+	res = tea->ctrl_handler.error;
+	if (res) {
+		v4l2_err(tea->v4l2_dev, "can't initialize controls\n");
+		v4l2_ctrl_handler_free(&tea->ctrl_handler);
+		return res;
+	}
+	v4l2_ctrl_handler_setup(&tea->ctrl_handler);
+
+	res = video_register_device(&tea->vd, VFL_TYPE_RADIO, -1);
+	if (res) {
+		v4l2_err(tea->v4l2_dev, "can't register video device!\n");
+		v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
+		return res;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(radio_tea5777_init);
+
+void radio_tea5777_exit(struct radio_tea5777 *tea)
+{
+	video_unregister_device(&tea->vd);
+	v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
+}
+EXPORT_SYMBOL_GPL(radio_tea5777_exit);