diff mbox

media: Add BCM2048 radio driver

Message ID 1381847218-8408-1-git-send-email-pali.rohar@gmail.com (mailing list archive)
State Changes Requested, archived
Headers

Commit Message

Pali Rohár Oct. 15, 2013, 2:26 p.m. UTC 
  This adds support for the BCM2048 radio module found in Nokia N900

Signed-off-by: Eero Nurkkala <ext-eero.nurkkala@nokia.com>
Signed-off-by: Nils Faerber <nils.faerber@kernelconcepts.de>
Signed-off-by: Joni Lapilainen <joni.lapilainen@gmail.com>
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
---
 drivers/media/radio/Kconfig         |   10 +
 drivers/media/radio/Makefile        |    1 +
 drivers/media/radio/radio-bcm2048.c | 2744 +++++++++++++++++++++++++++++++++++
 include/media/radio-bcm2048.h       |   30 +
 4 files changed, 2785 insertions(+)
 create mode 100644 drivers/media/radio/radio-bcm2048.c
 create mode 100644 include/media/radio-bcm2048.h

Comments

Hans Verkuil Oct. 15, 2013, 3:08 p.m. UTC | #1 
Hi Pali,

Thanks for the patch, but I am afraid it will need some work to make this
acceptable for inclusion into the kernel.

The main thing you need to do is to implement all the controls using the
control framework (see Documentation/video4linux/v4l2-controls.txt). Most drivers
are by now converted to the control framework, so you will find many examples of
how to do this in drivers/media/radio.

The sysfs stuff should be replaced by controls as well. A lot of the RDS support
is now available as controls (although there may well be some missing features,
but that is easy enough to add). Since the RDS data is actually read() from the
device I am not sure whether the RDS properties/controls should be there at all.

Finally this driver should probably be split up into two parts: one v4l2_subdev-based
core driver and one platform driver. See e.g. radio-si4713/si4713-i2c.c as a good
example. But I would wait with that until the rest of the driver is cleaned up. Then
I have a better idea of whether this is necessary or not.

It's also very useful to run v4l2-compliance (available in the v4l-utils.git repo
on git.linuxtv.org). That does lots of sanity checks.

Another option is to add the driver as-is to drivers/staging/media, and clean it up
bit by bit.

Regards,

	Hans

On 10/15/2013 04:26 PM, Pali Rohár wrote:
> This adds support for the BCM2048 radio module found in Nokia N900
> 
> Signed-off-by: Eero Nurkkala <ext-eero.nurkkala@nokia.com>
> Signed-off-by: Nils Faerber <nils.faerber@kernelconcepts.de>
> Signed-off-by: Joni Lapilainen <joni.lapilainen@gmail.com>
> Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
> ---
>  drivers/media/radio/Kconfig         |   10 +
>  drivers/media/radio/Makefile        |    1 +
>  drivers/media/radio/radio-bcm2048.c | 2744 +++++++++++++++++++++++++++++++++++
>  include/media/radio-bcm2048.h       |   30 +
>  4 files changed, 2785 insertions(+)
>  create mode 100644 drivers/media/radio/radio-bcm2048.c
>  create mode 100644 include/media/radio-bcm2048.h
> 
> diff --git a/drivers/media/radio/Kconfig b/drivers/media/radio/Kconfig
> index 6ecdc39..fdd14ef 100644
> --- a/drivers/media/radio/Kconfig
> +++ b/drivers/media/radio/Kconfig
> @@ -50,6 +50,16 @@ config USB_MR800
>  	  To compile this driver as a module, choose M here: the
>  	  module will be called radio-mr800.
>  
> +config I2C_BCM2048
> +	tristate "Broadcom BCM2048 FM Radio Receiver support"
> +	depends on I2C && VIDEO_V4L2
> +	---help---
> +	  Say Y here if you want support to BCM2048 FM Radio Receiver.
> +	  This device driver supports only i2c bus.
> +
> +	  To compile this driver as a module, choose M here: the
> +	  module will be called radio-bcm2048.
> +
>  config USB_DSBR
>  	tristate "D-Link/GemTek USB FM radio support"
>  	depends on USB && VIDEO_V4L2
> diff --git a/drivers/media/radio/Makefile b/drivers/media/radio/Makefile
> index 3b64560..9849f83 100644
> --- a/drivers/media/radio/Makefile
> +++ b/drivers/media/radio/Makefile
> @@ -24,6 +24,7 @@ obj-$(CONFIG_RADIO_MIROPCM20) += radio-miropcm20.o
>  obj-$(CONFIG_USB_DSBR) += dsbr100.o
>  obj-$(CONFIG_RADIO_SI470X) += si470x/
>  obj-$(CONFIG_USB_MR800) += radio-mr800.o
> +obj-$(CONFIG_I2C_BCM2048) += radio-bcm2048.o
>  obj-$(CONFIG_USB_KEENE) += radio-keene.o
>  obj-$(CONFIG_USB_MA901) += radio-ma901.o
>  obj-$(CONFIG_RADIO_TEA5764) += radio-tea5764.o
> diff --git a/drivers/media/radio/radio-bcm2048.c b/drivers/media/radio/radio-bcm2048.c
> new file mode 100644
> index 0000000..d948cac
> --- /dev/null
> +++ b/drivers/media/radio/radio-bcm2048.c
> @@ -0,0 +1,2744 @@
> +/*
> + * drivers/media/radio/radio-bcm2048.c
> + *
> + * Driver for I2C Broadcom BCM2048 FM Radio Receiver:
> + *
> + * Copyright (C) Nokia Corporation
> + * Contact: Eero Nurkkala <ext-eero.nurkkala@nokia.com>
> + *
> + * Copyright (C) Nils Faerber <nils.faerber@kernelconcepts.de>
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License
> + * version 2 as published by the Free Software Foundation.
> + *
> + * 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., 51 Franklin St, Fifth Floor, Boston, MA
> + * 02110-1301 USA
> + */
> +
> +/*
> + * History:
> + *		Eero Nurkkala <ext-eero.nurkkala@nokia.com>
> + *		Version 0.0.1
> + *		- Initial implementation
> + * 2010-02-21	Nils Faerber <nils.faerber@kernelconcepts.de>
> + *		Version 0.0.2
> + *		- Add support for interrupt driven rds data reading
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/init.h>
> +#include <linux/version.h>
> +#include <linux/interrupt.h>
> +#include <linux/sysfs.h>
> +#include <linux/completion.h>
> +#include <linux/delay.h>
> +#include <linux/i2c.h>
> +#include <linux/videodev2.h>
> +#include <linux/mutex.h>
> +#include <media/v4l2-common.h>
> +#include <media/v4l2-ioctl.h>
> +#include <media/radio-bcm2048.h>
> +
> +/* driver definitions */
> +#define BCM2048_DRIVER_AUTHOR	"Eero Nurkkala <ext-eero.nurkkala@nokia.com>"
> +#define BCM2048_DRIVER_NAME	BCM2048_NAME
> +#define BCM2048_DRIVER_VERSION	KERNEL_VERSION(0, 0, 1)
> +#define BCM2048_DRIVER_CARD	"Broadcom bcm2048 FM Radio Receiver"
> +#define BCM2048_DRIVER_DESC	"I2C driver for BCM2048 FM Radio Receiver"
> +
> +/* I2C Control Registers */
> +#define BCM2048_I2C_FM_RDS_SYSTEM	0x00
> +#define BCM2048_I2C_FM_CTRL		0x01
> +#define BCM2048_I2C_RDS_CTRL0		0x02
> +#define BCM2048_I2C_RDS_CTRL1		0x03
> +#define BCM2048_I2C_FM_AUDIO_PAUSE	0x04
> +#define BCM2048_I2C_FM_AUDIO_CTRL0	0x05
> +#define BCM2048_I2C_FM_AUDIO_CTRL1	0x06
> +#define BCM2048_I2C_FM_SEARCH_CTRL0	0x07
> +#define BCM2048_I2C_FM_SEARCH_CTRL1	0x08
> +#define BCM2048_I2C_FM_SEARCH_TUNE_MODE	0x09
> +#define BCM2048_I2C_FM_FREQ0		0x0a
> +#define BCM2048_I2C_FM_FREQ1		0x0b
> +#define BCM2048_I2C_FM_AF_FREQ0		0x0c
> +#define BCM2048_I2C_FM_AF_FREQ1		0x0d
> +#define BCM2048_I2C_FM_CARRIER		0x0e
> +#define BCM2048_I2C_FM_RSSI		0x0f
> +#define BCM2048_I2C_FM_RDS_MASK0	0x10
> +#define BCM2048_I2C_FM_RDS_MASK1	0x11
> +#define BCM2048_I2C_FM_RDS_FLAG0	0x12
> +#define BCM2048_I2C_FM_RDS_FLAG1	0x13
> +#define BCM2048_I2C_RDS_WLINE		0x14
> +#define BCM2048_I2C_RDS_BLKB_MATCH0	0x16
> +#define BCM2048_I2C_RDS_BLKB_MATCH1	0x17
> +#define BCM2048_I2C_RDS_BLKB_MASK0	0x18
> +#define BCM2048_I2C_RDS_BLKB_MASK1	0x19
> +#define BCM2048_I2C_RDS_PI_MATCH0	0x1a
> +#define BCM2048_I2C_RDS_PI_MATCH1	0x1b
> +#define BCM2048_I2C_RDS_PI_MASK0	0x1c
> +#define BCM2048_I2C_RDS_PI_MASK1	0x1d
> +#define BCM2048_I2C_SPARE1		0x20
> +#define BCM2048_I2C_SPARE2		0x21
> +#define BCM2048_I2C_FM_RDS_REV		0x28
> +#define BCM2048_I2C_SLAVE_CONFIGURATION	0x29
> +#define BCM2048_I2C_RDS_DATA		0x80
> +#define BCM2048_I2C_FM_BEST_TUNE_MODE	0x90
> +
> +/* BCM2048_I2C_FM_RDS_SYSTEM */
> +#define BCM2048_FM_ON			0x01
> +#define BCM2048_RDS_ON			0x02
> +
> +/* BCM2048_I2C_FM_CTRL */
> +#define BCM2048_BAND_SELECT			0x01
> +#define BCM2048_STEREO_MONO_AUTO_SELECT		0x02
> +#define BCM2048_STEREO_MONO_MANUAL_SELECT	0x04
> +#define BCM2048_STEREO_MONO_BLEND_SWITCH	0x08
> +#define BCM2048_HI_LO_INJECTION			0x10
> +
> +/* BCM2048_I2C_RDS_CTRL0 */
> +#define BCM2048_RBDS_RDS_SELECT		0x01
> +#define BCM2048_FLUSH_FIFO		0x02
> +
> +/* BCM2048_I2C_FM_AUDIO_PAUSE */
> +#define BCM2048_AUDIO_PAUSE_RSSI_TRESH	0x0f
> +#define BCM2048_AUDIO_PAUSE_DURATION	0xf0
> +
> +/* BCM2048_I2C_FM_AUDIO_CTRL0 */
> +#define BCM2048_RF_MUTE			0x01
> +#define BCM2048_MANUAL_MUTE		0x02
> +#define BCM2048_DAC_OUTPUT_LEFT		0x04
> +#define BCM2048_DAC_OUTPUT_RIGHT	0x08
> +#define BCM2048_AUDIO_ROUTE_DAC		0x10
> +#define BCM2048_AUDIO_ROUTE_I2S		0x20
> +#define BCM2048_DE_EMPHASIS_SELECT	0x40
> +#define BCM2048_AUDIO_BANDWIDTH_SELECT	0x80
> +
> +/* BCM2048_I2C_FM_SEARCH_CTRL0 */
> +#define BCM2048_SEARCH_RSSI_THRESHOLD	0x7f
> +#define BCM2048_SEARCH_DIRECTION	0x80
> +
> +/* BCM2048_I2C_FM_SEARCH_TUNE_MODE */
> +#define BCM2048_FM_AUTO_SEARCH		0x03
> +
> +/* BCM2048_I2C_FM_RSSI */
> +#define BCM2048_RSSI_VALUE		0xff
> +
> +/* BCM2048_I2C_FM_RDS_MASK0 */
> +/* BCM2048_I2C_FM_RDS_MASK1 */
> +#define BCM2048_FM_FLAG_SEARCH_TUNE_FINISHED	0x01
> +#define BCM2048_FM_FLAG_SEARCH_TUNE_FAIL	0x02
> +#define BCM2048_FM_FLAG_RSSI_LOW		0x04
> +#define BCM2048_FM_FLAG_CARRIER_ERROR_HIGH	0x08
> +#define BCM2048_FM_FLAG_AUDIO_PAUSE_INDICATION	0x10
> +#define BCM2048_FLAG_STEREO_DETECTED		0x20
> +#define BCM2048_FLAG_STEREO_ACTIVE		0x40
> +
> +/* BCM2048_I2C_RDS_DATA */
> +#define BCM2048_SLAVE_ADDRESS			0x3f
> +#define BCM2048_SLAVE_ENABLE			0x80
> +
> +/* BCM2048_I2C_FM_BEST_TUNE_MODE */
> +#define BCM2048_BEST_TUNE_MODE			0x80
> +
> +#define BCM2048_FM_FLAG_SEARCH_TUNE_FINISHED	0x01
> +#define BCM2048_FM_FLAG_SEARCH_TUNE_FAIL	0x02
> +#define BCM2048_FM_FLAG_RSSI_LOW		0x04
> +#define BCM2048_FM_FLAG_CARRIER_ERROR_HIGH	0x08
> +#define BCM2048_FM_FLAG_AUDIO_PAUSE_INDICATION	0x10
> +#define BCM2048_FLAG_STEREO_DETECTED		0x20
> +#define BCM2048_FLAG_STEREO_ACTIVE		0x40
> +
> +#define BCM2048_RDS_FLAG_FIFO_WLINE		0x02
> +#define BCM2048_RDS_FLAG_B_BLOCK_MATCH		0x08
> +#define BCM2048_RDS_FLAG_SYNC_LOST		0x10
> +#define BCM2048_RDS_FLAG_PI_MATCH		0x20
> +
> +#define BCM2048_RDS_MARK_END_BYTE0		0x7C
> +#define BCM2048_RDS_MARK_END_BYTEN		0xFF
> +
> +#define BCM2048_FM_FLAGS_ALL	(FM_FLAG_SEARCH_TUNE_FINISHED | \
> +				 FM_FLAG_SEARCH_TUNE_FAIL | \
> +				 FM_FLAG_RSSI_LOW | \
> +				 FM_FLAG_CARRIER_ERROR_HIGH | \
> +				 FM_FLAG_AUDIO_PAUSE_INDICATION | \
> +				 FLAG_STEREO_DETECTED | FLAG_STEREO_ACTIVE)
> +
> +#define BCM2048_RDS_FLAGS_ALL	(RDS_FLAG_FIFO_WLINE | \
> +				 RDS_FLAG_B_BLOCK_MATCH | \
> +				 RDS_FLAG_SYNC_LOST | RDS_FLAG_PI_MATCH)
> +
> +#define BCM2048_DEFAULT_TIMEOUT		1500
> +#define BCM2048_AUTO_SEARCH_TIMEOUT	3000
> +
> +
> +#define BCM2048_FREQDEV_UNIT		10000
> +#define BCM2048_FREQV4L2_MULTI		625
> +#define dev_to_v4l2(f)	((f * BCM2048_FREQDEV_UNIT) / BCM2048_FREQV4L2_MULTI)
> +#define v4l2_to_dev(f)	((f * BCM2048_FREQV4L2_MULTI) / BCM2048_FREQDEV_UNIT)
> +
> +#define msb(x)                  ((u8)((u16) x >> 8))
> +#define lsb(x)                  ((u8)((u16) x &  0x00FF))
> +#define compose_u16(msb, lsb)	(((u16)msb << 8) | lsb)
> +
> +#define BCM2048_DEFAULT_POWERING_DELAY	20
> +#define BCM2048_DEFAULT_REGION		0x02
> +#define BCM2048_DEFAULT_MUTE		0x01
> +#define BCM2048_DEFAULT_RSSI_THRESHOLD	0x64
> +#define BCM2048_DEFAULT_RDS_WLINE	0x7E
> +
> +#define BCM2048_FM_SEARCH_INACTIVE	0x00
> +#define BCM2048_FM_PRE_SET_MODE		0x01
> +#define BCM2048_FM_AUTO_SEARCH_MODE	0x02
> +#define BCM2048_FM_AF_JUMP_MODE		0x03
> +
> +#define BCM2048_FREQUENCY_BASE		64000
> +
> +#define BCM2048_POWER_ON		0x01
> +#define BCM2048_POWER_OFF		0x00
> +
> +#define BCM2048_ITEM_ENABLED		0x01
> +#define BCM2048_SEARCH_DIRECTION_UP	0x01
> +
> +#define BCM2048_DE_EMPHASIS_75us	75
> +#define BCM2048_DE_EMPHASIS_50us	50
> +
> +#define BCM2048_SCAN_FAIL		0x00
> +#define BCM2048_SCAN_OK			0x01
> +
> +#define BCM2048_FREQ_ERROR_FLOOR	-20
> +#define BCM2048_FREQ_ERROR_ROOF		20
> +
> +/* -60 dB is reported as full signal strenght */
> +#define BCM2048_RSSI_LEVEL_BASE		-60
> +#define BCM2048_RSSI_LEVEL_ROOF		-100
> +#define BCM2048_RSSI_LEVEL_ROOF_NEG	100
> +#define BCM2048_SIGNAL_MULTIPLIER	(0xFFFF / \
> +					 (BCM2048_RSSI_LEVEL_ROOF_NEG + \
> +					  BCM2048_RSSI_LEVEL_BASE))
> +
> +#define BCM2048_RDS_FIFO_DUPLE_SIZE	0x03
> +#define BCM2048_RDS_CRC_MASK		0x0F
> +#define BCM2048_RDS_CRC_NONE		0x00
> +#define BCM2048_RDS_CRC_MAX_2BITS	0x04
> +#define BCM2048_RDS_CRC_LEAST_2BITS	0x08
> +#define BCM2048_RDS_CRC_UNRECOVARABLE	0x0C
> +
> +#define BCM2048_RDS_BLOCK_MASK		0xF0
> +#define BCM2048_RDS_BLOCK_A		0x00
> +#define BCM2048_RDS_BLOCK_B		0x10
> +#define BCM2048_RDS_BLOCK_C		0x20
> +#define BCM2048_RDS_BLOCK_D		0x30
> +#define BCM2048_RDS_BLOCK_C_SCORED	0x40
> +#define BCM2048_RDS_BLOCK_E		0x60
> +
> +#define BCM2048_RDS_RT			0x20
> +#define BCM2048_RDS_PS			0x00
> +
> +#define BCM2048_RDS_GROUP_AB_MASK	0x08
> +#define BCM2048_RDS_GROUP_A		0x00
> +#define BCM2048_RDS_GROUP_B		0x08
> +
> +#define BCM2048_RDS_RT_AB_MASK		0x10
> +#define BCM2048_RDS_RT_A		0x00
> +#define BCM2048_RDS_RT_B		0x10
> +#define BCM2048_RDS_RT_INDEX		0x0F
> +
> +#define BCM2048_RDS_PS_INDEX		0x03
> +
> +struct rds_info {
> +	u16 rds_pi;
> +#define BCM2048_MAX_RDS_RT (64 + 1)
> +	u8 rds_rt[BCM2048_MAX_RDS_RT];
> +	u8 rds_rt_group_b;
> +	u8 rds_rt_ab;
> +#define BCM2048_MAX_RDS_PS (8 + 1)
> +	u8 rds_ps[BCM2048_MAX_RDS_PS];
> +	u8 rds_ps_group;
> +	u8 rds_ps_group_cnt;
> +#define BCM2048_MAX_RDS_RADIO_TEXT 255
> +	u8 radio_text[BCM2048_MAX_RDS_RADIO_TEXT + 3];
> +	u8 text_len;
> +};
> +
> +struct region_info {
> +	u32 bottom_frequency;
> +	u32 top_frequency;
> +	u8 deemphasis;
> +	u8 channel_spacing;
> +	u8 region;
> +};
> +
> +struct bcm2048_device {
> +	struct i2c_client *client;
> +	struct video_device *videodev;
> +	struct work_struct work;
> +	struct completion compl;
> +	struct mutex mutex;
> +	struct bcm2048_platform_data *platform_data;
> +	struct rds_info rds_info;
> +	struct region_info region_info;
> +	u16 frequency;
> +	u8 cache_fm_rds_system;
> +	u8 cache_fm_ctrl;
> +	u8 cache_fm_audio_ctrl0;
> +	u8 cache_fm_search_ctrl0;
> +	u8 power_state;
> +	u8 rds_state;
> +	u8 fifo_size;
> +	u8 scan_state;
> +	u8 mute_state;
> +
> +	/* for rds data device read */
> +	wait_queue_head_t read_queue;
> +	unsigned int users;
> +	unsigned char rds_data_available;
> +	unsigned int rd_index;
> +};
> +
> +static int radio_nr = -1;	/* radio device minor (-1 ==> auto assign) */
> +module_param(radio_nr, int, 0);
> +MODULE_PARM_DESC(radio_nr,
> +		 "Minor number for radio device (-1 ==> auto assign)");
> +
> +static struct region_info region_configs[] = {
> +	/* USA */
> +	{
> +		.channel_spacing	= 20,
> +		.bottom_frequency	= 87500,
> +		.top_frequency		= 108000,
> +		.deemphasis		= 75,
> +		.region			= 0,
> +	},
> +	/* Australia */
> +	{
> +		.channel_spacing	= 20,
> +		.bottom_frequency	= 87500,
> +		.top_frequency		= 108000,
> +		.deemphasis		= 50,
> +		.region			= 1,
> +	},
> +	/* Europe */
> +	{
> +		.channel_spacing	= 10,
> +		.bottom_frequency	= 87500,
> +		.top_frequency		= 108000,
> +		.deemphasis		= 50,
> +		.region			= 2,
> +	},
> +	/* Japan */
> +	{
> +		.channel_spacing	= 10,
> +		.bottom_frequency	= 76000,
> +		.top_frequency		= 90000,
> +		.deemphasis		= 50,
> +		.region			= 3,
> +	},
> +	/* Japan wide band */
> +	{
> +		.channel_spacing	= 10,
> +		.bottom_frequency	= 76000,
> +		.top_frequency		= 108000,
> +		.deemphasis		= 50,
> +		.region			= 4,
> +	},
> +};
> +
> +/*
> + *	I2C Interface read / write
> + */
> +static int bcm2048_send_command(struct bcm2048_device *bdev, unsigned int reg,
> +					unsigned int value)
> +{
> +	struct i2c_client *client = bdev->client;
> +	u8 data[2];
> +
> +	if (!bdev->power_state) {
> +		dev_err(&bdev->client->dev, "bcm2048: chip not powered!\n");
> +		return -EIO;
> +	}
> +
> +	data[0] = reg & 0xff;
> +	data[1] = value & 0xff;
> +
> +	if (i2c_master_send(client, data, 2) == 2) {
> +		return 0;
> +	} else {
> +		dev_err(&bdev->client->dev, "BCM I2C error!\n");
> +		dev_err(&bdev->client->dev, "Is Bluetooth up and running?\n");
> +		return -EIO;
> +	}
> +}
> +
> +static int bcm2048_recv_command(struct bcm2048_device *bdev, unsigned int reg,
> +			u8 *value)
> +{
> +	struct i2c_client *client = bdev->client;
> +
> +	if (!bdev->power_state) {
> +		dev_err(&bdev->client->dev, "bcm2048: chip not powered!\n");
> +		return -EIO;
> +	}
> +
> +	value[0] = i2c_smbus_read_byte_data(client, reg & 0xff);
> +
> +	return 0;
> +}
> +
> +static int bcm2048_recv_duples(struct bcm2048_device *bdev, unsigned int reg,
> +			u8 *value, u8 duples)
> +{
> +	struct i2c_client *client = bdev->client;
> +	struct i2c_adapter *adap = client->adapter;
> +	struct i2c_msg msg[2];
> +	u8 buf;
> +
> +	if (!bdev->power_state) {
> +		dev_err(&bdev->client->dev, "bcm2048: chip not powered!\n");
> +		return -EIO;
> +	}
> +
> +	buf = reg & 0xff;
> +
> +	msg[0].addr = client->addr;
> +	msg[0].flags = client->flags & I2C_M_TEN;
> +	msg[0].len = 1;
> +	msg[0].buf = &buf;
> +
> +	msg[1].addr = client->addr;
> +	msg[1].flags = client->flags & I2C_M_TEN;
> +	msg[1].flags |= I2C_M_RD;
> +	msg[1].len = duples;
> +	msg[1].buf = value;
> +
> +	return i2c_transfer(adap, msg, 2);
> +}
> +
> +/*
> + *	BCM2048 - I2C register programming helpers
> + */
> +static int bcm2048_set_power_state(struct bcm2048_device *bdev, u8 power)
> +{
> +	int err = 0;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	if (power) {
> +		bdev->power_state = BCM2048_POWER_ON;
> +		bdev->cache_fm_rds_system |= BCM2048_FM_ON;
> +	} else {
> +		bdev->cache_fm_rds_system &= ~BCM2048_FM_ON;
> +	}
> +
> +	/*
> +	 * Warning! FM cannot be turned off because then
> +	 * the I2C communications get ruined!
> +	 * Comment off the "if (power)" when the chip works!
> +	 */
> +	if (power)
> +		err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_SYSTEM,
> +					bdev->cache_fm_rds_system);
> +	msleep(BCM2048_DEFAULT_POWERING_DELAY);
> +
> +	if (!power)
> +		bdev->power_state = BCM2048_POWER_OFF;
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_power_state(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 value;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_SYSTEM, &value);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err && (value & BCM2048_FM_ON))
> +		return BCM2048_POWER_ON;
> +
> +	return err;
> +}
> +
> +static int bcm2048_set_rds_no_lock(struct bcm2048_device *bdev, u8 rds_on)
> +{
> +	int err;
> +	u8 flags;
> +
> +	bdev->cache_fm_rds_system &= ~BCM2048_RDS_ON;
> +
> +	if (rds_on) {
> +		bdev->cache_fm_rds_system |= BCM2048_RDS_ON;
> +		bdev->rds_state = BCM2048_RDS_ON;
> +		flags =	BCM2048_RDS_FLAG_FIFO_WLINE;
> +		err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_MASK1,
> +						flags);
> +	} else {
> +		flags =	0;
> +		bdev->rds_state = 0;
> +		err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_MASK1,
> +						flags);
> +		memset(&bdev->rds_info, 0, sizeof(bdev->rds_info));
> +	}
> +
> +	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_SYSTEM,
> +					bdev->cache_fm_rds_system);
> +
> +	return err;
> +}
> +
> +static int bcm2048_get_rds_no_lock(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 value;
> +
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_SYSTEM, &value);
> +
> +	if (!err && (value & BCM2048_RDS_ON))
> +		return BCM2048_ITEM_ENABLED;
> +
> +	return err;
> +}
> +
> +static int bcm2048_set_rds(struct bcm2048_device *bdev, u8 rds_on)
> +{
> +	int err;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_set_rds_no_lock(bdev, rds_on);
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_rds(struct bcm2048_device *bdev)
> +{
> +	int err;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_get_rds_no_lock(bdev);
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_rds_pi(struct bcm2048_device *bdev)
> +{
> +	return bdev->rds_info.rds_pi;
> +}
> +
> +static int bcm2048_set_fm_automatic_stereo_mono(struct bcm2048_device *bdev,
> +						u8 enabled)
> +{
> +	int err;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	bdev->cache_fm_ctrl &= ~BCM2048_STEREO_MONO_AUTO_SELECT;
> +
> +	if (enabled)
> +		bdev->cache_fm_ctrl |= BCM2048_STEREO_MONO_AUTO_SELECT;
> +
> +	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_CTRL,
> +					bdev->cache_fm_ctrl);
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_set_fm_hi_lo_injection(struct bcm2048_device *bdev,
> +						u8 hi_lo)
> +{
> +	int err;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	bdev->cache_fm_ctrl &= ~BCM2048_HI_LO_INJECTION;
> +
> +	if (hi_lo)
> +		bdev->cache_fm_ctrl |= BCM2048_HI_LO_INJECTION;
> +
> +	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_CTRL,
> +					bdev->cache_fm_ctrl);
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_fm_hi_lo_injection(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 value;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_CTRL, &value);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err && (value & BCM2048_HI_LO_INJECTION))
> +		return BCM2048_ITEM_ENABLED;
> +
> +	return err;
> +}
> +
> +static int bcm2048_set_fm_frequency(struct bcm2048_device *bdev, u32 frequency)
> +{
> +	int err;
> +
> +	if (frequency < bdev->region_info.bottom_frequency ||
> +		frequency > bdev->region_info.top_frequency)
> +		return -EDOM;
> +
> +	frequency -= BCM2048_FREQUENCY_BASE;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_FREQ0, lsb(frequency));
> +	err |= bcm2048_send_command(bdev, BCM2048_I2C_FM_FREQ1,
> +					msb(frequency));
> +
> +	if (!err)
> +		bdev->frequency = frequency;
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_fm_frequency(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 lsb, msb;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_FREQ0, &lsb);
> +	err |= bcm2048_recv_command(bdev, BCM2048_I2C_FM_FREQ1, &msb);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (err)
> +		return err;
> +
> +	err = compose_u16(msb, lsb);
> +	err += BCM2048_FREQUENCY_BASE;
> +
> +	return err;
> +}
> +
> +static int bcm2048_set_fm_af_frequency(struct bcm2048_device *bdev,
> +						u32 frequency)
> +{
> +	int err;
> +
> +	if (frequency < bdev->region_info.bottom_frequency ||
> +		frequency > bdev->region_info.top_frequency)
> +		return -EDOM;
> +
> +	frequency -= BCM2048_FREQUENCY_BASE;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AF_FREQ0,
> +					lsb(frequency));
> +	err |= bcm2048_send_command(bdev, BCM2048_I2C_FM_AF_FREQ1,
> +					msb(frequency));
> +	if (!err)
> +		bdev->frequency = frequency;
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_fm_af_frequency(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 lsb, msb;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AF_FREQ0, &lsb);
> +	err |= bcm2048_recv_command(bdev, BCM2048_I2C_FM_AF_FREQ1, &msb);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (err)
> +		return err;
> +
> +	err = compose_u16(msb, lsb);
> +	err += BCM2048_FREQUENCY_BASE;
> +
> +	return err;
> +}
> +
> +static int bcm2048_set_fm_deemphasis(struct bcm2048_device *bdev, int d)
> +{
> +	int err;
> +	u8 deemphasis;
> +
> +	if (d == BCM2048_DE_EMPHASIS_75us)
> +		deemphasis = BCM2048_DE_EMPHASIS_SELECT;
> +	else
> +		deemphasis = 0;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	bdev->cache_fm_audio_ctrl0 &= ~BCM2048_DE_EMPHASIS_SELECT;
> +	bdev->cache_fm_audio_ctrl0 |= deemphasis;
> +
> +	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
> +		bdev->cache_fm_audio_ctrl0);
> +
> +	if (!err)
> +		bdev->region_info.deemphasis = d;
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	return err;
> +}
> +
> +static int bcm2048_get_fm_deemphasis(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 value;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0, &value);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err) {
> +		if (value & BCM2048_DE_EMPHASIS_SELECT)
> +			return BCM2048_DE_EMPHASIS_75us;
> +		else
> +			return BCM2048_DE_EMPHASIS_50us;
> +	}
> +
> +	return err;
> +}
> +
> +static int bcm2048_set_region(struct bcm2048_device *bdev, u8 region)
> +{
> +	int err;
> +	u32 new_frequency = 0;
> +
> +	if (region > ARRAY_SIZE(region_configs))
> +		return -EINVAL;
> +
> +	mutex_lock(&bdev->mutex);
> +	memcpy(&bdev->region_info, &region_configs[region],
> +		sizeof(struct region_info));
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (bdev->frequency < region_configs[region].bottom_frequency ||
> +		bdev->frequency > region_configs[region].top_frequency)
> +		new_frequency = region_configs[region].bottom_frequency;
> +
> +	if (new_frequency > 0) {
> +		err = bcm2048_set_fm_frequency(bdev, new_frequency);
> +
> +		if (err)
> +			goto done;
> +	}
> +
> +	err = bcm2048_set_fm_deemphasis(bdev,
> +			region_configs[region].deemphasis);
> +
> +done:
> +	return err;
> +}
> +
> +static int bcm2048_get_region(struct bcm2048_device *bdev)
> +{
> +	int err;
> +
> +	mutex_lock(&bdev->mutex);
> +	err = bdev->region_info.region;
> +	mutex_unlock(&bdev->mutex);
> +
> +	return err;
> +}
> +
> +static int bcm2048_set_mute(struct bcm2048_device *bdev, u16 mute)
> +{
> +	int err;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	bdev->cache_fm_audio_ctrl0 &= ~(BCM2048_RF_MUTE | BCM2048_MANUAL_MUTE);
> +
> +	if (mute)
> +		bdev->cache_fm_audio_ctrl0 |= (BCM2048_RF_MUTE |
> +						BCM2048_MANUAL_MUTE);
> +
> +	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
> +					bdev->cache_fm_audio_ctrl0);
> +
> +	if (!err)
> +		bdev->mute_state = mute;
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_mute(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 value;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	if (bdev->power_state) {
> +		err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
> +						&value);
> +		if (!err)
> +			err = value & (BCM2048_RF_MUTE | BCM2048_MANUAL_MUTE);
> +	} else {
> +		err = bdev->mute_state;
> +	}
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_set_audio_route(struct bcm2048_device *bdev, u8 route)
> +{
> +	int err;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	route &= (BCM2048_AUDIO_ROUTE_DAC | BCM2048_AUDIO_ROUTE_I2S);
> +	bdev->cache_fm_audio_ctrl0 &= ~(BCM2048_AUDIO_ROUTE_DAC |
> +		BCM2048_AUDIO_ROUTE_I2S);
> +	bdev->cache_fm_audio_ctrl0 |= route;
> +
> +	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
> +					bdev->cache_fm_audio_ctrl0);
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_audio_route(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 value;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0, &value);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err)
> +		return value & (BCM2048_AUDIO_ROUTE_DAC |
> +			BCM2048_AUDIO_ROUTE_I2S);
> +
> +	return err;
> +}
> +
> +static int bcm2048_set_dac_output(struct bcm2048_device *bdev, u8 channels)
> +{
> +	int err;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	bdev->cache_fm_audio_ctrl0 &= ~(BCM2048_DAC_OUTPUT_LEFT |
> +					BCM2048_DAC_OUTPUT_RIGHT);
> +	bdev->cache_fm_audio_ctrl0 |= channels;
> +
> +	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
> +					bdev->cache_fm_audio_ctrl0);
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_dac_output(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 value;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0, &value);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err)
> +		return value & (BCM2048_DAC_OUTPUT_LEFT |
> +			BCM2048_DAC_OUTPUT_RIGHT);
> +
> +	return err;
> +}
> +
> +static int bcm2048_set_fm_search_rssi_threshold(struct bcm2048_device *bdev,
> +							u8 threshold)
> +{
> +	int err;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	threshold &= BCM2048_SEARCH_RSSI_THRESHOLD;
> +	bdev->cache_fm_search_ctrl0 &= ~BCM2048_SEARCH_RSSI_THRESHOLD;
> +	bdev->cache_fm_search_ctrl0 |= threshold;
> +
> +	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_SEARCH_CTRL0,
> +					bdev->cache_fm_search_ctrl0);
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_fm_search_rssi_threshold(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 value;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_SEARCH_CTRL0, &value);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err)
> +		return value & BCM2048_SEARCH_RSSI_THRESHOLD;
> +
> +	return err;
> +}
> +
> +static int bcm2048_set_fm_search_mode_direction(struct bcm2048_device *bdev,
> +						u8 direction)
> +{
> +	int err;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	bdev->cache_fm_search_ctrl0 &= ~BCM2048_SEARCH_DIRECTION;
> +
> +	if (direction)
> +		bdev->cache_fm_search_ctrl0 |= BCM2048_SEARCH_DIRECTION;
> +
> +	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_SEARCH_CTRL0,
> +					bdev->cache_fm_search_ctrl0);
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_fm_search_mode_direction(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 value;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_SEARCH_CTRL0, &value);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err && (value & BCM2048_SEARCH_DIRECTION))
> +		return BCM2048_SEARCH_DIRECTION_UP;
> +
> +	return err;
> +}
> +
> +static int bcm2048_set_fm_search_tune_mode(struct bcm2048_device *bdev,
> +						u8 mode)
> +{
> +	int err, timeout, restart_rds = 0;
> +	u8 value, flags;
> +
> +	value = mode & BCM2048_FM_AUTO_SEARCH;
> +
> +	flags =	BCM2048_FM_FLAG_SEARCH_TUNE_FINISHED |
> +		BCM2048_FM_FLAG_SEARCH_TUNE_FAIL;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	/*
> +	 * If RDS is enabled, and frequency is changed, RDS quits working.
> +	 * Thus, always restart RDS if it's enabled. Moreover, RDS must
> +	 * not be enabled while changing the frequency because it can
> +	 * provide a race to the mutex from the workqueue handler if RDS
> +	 * IRQ occurs while waiting for frequency changed IRQ.
> +	 */
> +	if (bcm2048_get_rds_no_lock(bdev)) {
> +		err = bcm2048_set_rds_no_lock(bdev, 0);
> +		if (err)
> +			goto unlock;
> +		restart_rds = 1;
> +	}
> +
> +	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_MASK0, flags);
> +
> +	if (err)
> +		goto unlock;
> +
> +	bcm2048_send_command(bdev, BCM2048_I2C_FM_SEARCH_TUNE_MODE, value);
> +
> +	if (mode != BCM2048_FM_AUTO_SEARCH_MODE)
> +		timeout = BCM2048_DEFAULT_TIMEOUT;
> +	else
> +		timeout = BCM2048_AUTO_SEARCH_TIMEOUT;
> +
> +	if (!wait_for_completion_timeout(&bdev->compl,
> +			msecs_to_jiffies(timeout)))
> +			dev_err(&bdev->client->dev, "IRQ timeout.\n");
> +
> +	if (value)
> +		if (!bdev->scan_state)
> +			err = -EIO;
> +
> +unlock:
> +	if (restart_rds)
> +		err |= bcm2048_set_rds_no_lock(bdev, 1);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	return err;
> +}
> +
> +static int bcm2048_get_fm_search_tune_mode(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 value;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_SEARCH_TUNE_MODE,
> +					&value);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err)
> +		return value & BCM2048_FM_AUTO_SEARCH;
> +
> +	return err;
> +}
> +
> +static int bcm2048_set_rds_b_block_mask(struct bcm2048_device *bdev, u16 mask)
> +{
> +	int err;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_send_command(bdev,
> +			BCM2048_I2C_RDS_BLKB_MASK0, lsb(mask));
> +	err |= bcm2048_send_command(bdev,
> +			BCM2048_I2C_RDS_BLKB_MASK1, msb(mask));
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_rds_b_block_mask(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 lsb, msb;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev,
> +			BCM2048_I2C_RDS_BLKB_MASK0, &lsb);
> +	err |= bcm2048_recv_command(bdev,
> +			BCM2048_I2C_RDS_BLKB_MASK1, &msb);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err)
> +		return compose_u16(msb, lsb);
> +
> +	return err;
> +}
> +
> +static int bcm2048_set_rds_b_block_match(struct bcm2048_device *bdev,
> +						u16 match)
> +{
> +	int err;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_send_command(bdev,
> +			BCM2048_I2C_RDS_BLKB_MATCH0, lsb(match));
> +	err |= bcm2048_send_command(bdev,
> +			BCM2048_I2C_RDS_BLKB_MATCH1, msb(match));
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_rds_b_block_match(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 lsb, msb;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev,
> +			BCM2048_I2C_RDS_BLKB_MATCH0, &lsb);
> +	err |= bcm2048_recv_command(bdev,
> +			BCM2048_I2C_RDS_BLKB_MATCH1, &msb);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err)
> +		return compose_u16(msb, lsb);
> +
> +	return err;
> +}
> +
> +static int bcm2048_set_rds_pi_mask(struct bcm2048_device *bdev, u16 mask)
> +{
> +	int err;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_send_command(bdev,
> +			BCM2048_I2C_RDS_PI_MASK0, lsb(mask));
> +	err |= bcm2048_send_command(bdev,
> +			BCM2048_I2C_RDS_PI_MASK1, msb(mask));
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_rds_pi_mask(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 lsb, msb;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev,
> +			BCM2048_I2C_RDS_PI_MASK0, &lsb);
> +	err |= bcm2048_recv_command(bdev,
> +			BCM2048_I2C_RDS_PI_MASK1, &msb);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err)
> +		return compose_u16(msb, lsb);
> +
> +	return err;
> +}
> +
> +static int bcm2048_set_rds_pi_match(struct bcm2048_device *bdev, u16 match)
> +{
> +	int err;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_send_command(bdev,
> +			BCM2048_I2C_RDS_PI_MATCH0, lsb(match));
> +	err |= bcm2048_send_command(bdev,
> +			BCM2048_I2C_RDS_PI_MATCH1, msb(match));
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_rds_pi_match(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 lsb, msb;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev,
> +			BCM2048_I2C_RDS_PI_MATCH0, &lsb);
> +	err |= bcm2048_recv_command(bdev,
> +			BCM2048_I2C_RDS_PI_MATCH1, &msb);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err)
> +		return compose_u16(msb, lsb);
> +
> +	return err;
> +}
> +
> +static int bcm2048_set_fm_rds_mask(struct bcm2048_device *bdev, u16 mask)
> +{
> +	int err;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_send_command(bdev,
> +			BCM2048_I2C_FM_RDS_MASK0, lsb(mask));
> +	err |= bcm2048_send_command(bdev,
> +			BCM2048_I2C_FM_RDS_MASK1, msb(mask));
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_fm_rds_mask(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 value0, value1;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_MASK0, &value0);
> +	err |= bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_MASK1, &value1);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err)
> +		return compose_u16(value1, value0);
> +
> +	return err;
> +}
> +
> +static int bcm2048_get_fm_rds_flags(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 value0, value1;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_FLAG0, &value0);
> +	err |= bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_FLAG1, &value1);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err)
> +		return compose_u16(value1, value0);
> +
> +	return err;
> +}
> +
> +static int bcm2048_get_region_bottom_frequency(struct bcm2048_device *bdev)
> +{
> +	return bdev->region_info.bottom_frequency;
> +}
> +
> +static int bcm2048_get_region_top_frequency(struct bcm2048_device *bdev)
> +{
> +	return bdev->region_info.top_frequency;
> +}
> +
> +static int bcm2048_set_fm_best_tune_mode(struct bcm2048_device *bdev, u8 mode)
> +{
> +	int err;
> +	u8 value;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	/* Perform read as the manual indicates */
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_BEST_TUNE_MODE,
> +					&value);
> +	value &= ~BCM2048_BEST_TUNE_MODE;
> +
> +	if (mode)
> +		value |= BCM2048_BEST_TUNE_MODE;
> +	err |= bcm2048_send_command(bdev, BCM2048_I2C_FM_BEST_TUNE_MODE,
> +					value);
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_fm_best_tune_mode(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 value;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_BEST_TUNE_MODE,
> +					&value);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err && (value & BCM2048_BEST_TUNE_MODE))
> +		return BCM2048_ITEM_ENABLED;
> +
> +	return err;
> +}
> +
> +static int bcm2048_get_fm_carrier_error(struct bcm2048_device *bdev)
> +{
> +	int err = 0;
> +	s8 value;
> +
> +	mutex_lock(&bdev->mutex);
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_CARRIER, &value);
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err)
> +		return value;
> +
> +	return err;
> +}
> +
> +static int bcm2048_get_fm_rssi(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	s8 value;
> +
> +	mutex_lock(&bdev->mutex);
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RSSI, &value);
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err)
> +		return value;
> +
> +	return err;
> +}
> +
> +static int bcm2048_set_rds_wline(struct bcm2048_device *bdev, u8 wline)
> +{
> +	int err;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_send_command(bdev, BCM2048_I2C_RDS_WLINE, wline);
> +
> +	if (!err)
> +		bdev->fifo_size = wline;
> +
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_rds_wline(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 value;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_RDS_WLINE, &value);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err) {
> +		bdev->fifo_size = value;
> +		return value;
> +	}
> +
> +	return err;
> +}
> +
> +static int bcm2048_checkrev(struct bcm2048_device *bdev)
> +{
> +	int err;
> +	u8 version;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_REV, &version);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	if (!err) {
> +		dev_info(&bdev->client->dev, "BCM2048 Version 0x%x\n",
> +			version);
> +		return version;
> +	}
> +
> +	return err;
> +}
> +
> +static int bcm2048_get_rds_rt(struct bcm2048_device *bdev, char *data)
> +{
> +	int err = 0, i, j = 0, ce = 0, cr = 0;
> +	char data_buffer[BCM2048_MAX_RDS_RT+1];
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	if (!bdev->rds_info.text_len) {
> +		err = -EINVAL;
> +		goto unlock;
> +	}
> +
> +	for (i = 0; i < BCM2048_MAX_RDS_RT; i++) {
> +		if (bdev->rds_info.rds_rt[i]) {
> +			ce = i;
> +			/* Skip the carriage return */
> +			if (bdev->rds_info.rds_rt[i] != 0x0d) {
> +				data_buffer[j++] = bdev->rds_info.rds_rt[i];
> +			} else {
> +				cr = i;
> +				break;
> +			}
> +		}
> +	}
> +
> +	if (j <= BCM2048_MAX_RDS_RT)
> +		data_buffer[j] = 0;
> +
> +	for (i = 0; i < BCM2048_MAX_RDS_RT; i++) {
> +		if (!bdev->rds_info.rds_rt[i]) {
> +			if (cr && (i < cr)) {
> +				err = -EBUSY;
> +				goto unlock;
> +			}
> +			if (i < ce) {
> +				if (cr && (i >= cr))
> +					break;
> +				err = -EBUSY;
> +				goto unlock;
> +			}
> +		}
> +	}
> +
> +	memcpy(data, data_buffer, sizeof(data_buffer));
> +
> +unlock:
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static int bcm2048_get_rds_ps(struct bcm2048_device *bdev, char *data)
> +{
> +	int err = 0, i, j = 0;
> +	char data_buffer[BCM2048_MAX_RDS_PS+1];
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	if (!bdev->rds_info.text_len) {
> +		err = -EINVAL;
> +		goto unlock;
> +	}
> +
> +	for (i = 0; i < BCM2048_MAX_RDS_PS; i++) {
> +		if (bdev->rds_info.rds_ps[i]) {
> +			data_buffer[j++] = bdev->rds_info.rds_ps[i];
> +		} else {
> +			if (i < (BCM2048_MAX_RDS_PS - 1)) {
> +				err = -EBUSY;
> +				goto unlock;
> +			}
> +		}
> +	}
> +
> +	if (j <= BCM2048_MAX_RDS_PS)
> +		data_buffer[j] = 0;
> +
> +	memcpy(data, data_buffer, sizeof(data_buffer));
> +
> +unlock:
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +static void bcm2048_parse_rds_pi(struct bcm2048_device *bdev)
> +{
> +	int i, cnt = 0;
> +	u16 pi;
> +
> +	for (i = 0; i < bdev->fifo_size; i += BCM2048_RDS_FIFO_DUPLE_SIZE) {
> +
> +		/* Block A match, only data without crc errors taken */
> +		if (bdev->rds_info.radio_text[i] == BCM2048_RDS_BLOCK_A) {
> +
> +			pi = ((bdev->rds_info.radio_text[i+1] << 8) +
> +				bdev->rds_info.radio_text[i+2]);
> +
> +			if (!bdev->rds_info.rds_pi) {
> +				bdev->rds_info.rds_pi = pi;
> +				return;
> +			}
> +			if (pi != bdev->rds_info.rds_pi) {
> +				cnt++;
> +				if (cnt > 3) {
> +					bdev->rds_info.rds_pi = pi;
> +					cnt = 0;
> +				}
> +			} else {
> +				cnt = 0;
> +			}
> +		}
> +	}
> +}
> +
> +static int bcm2048_rds_block_crc(struct bcm2048_device *bdev, int i)
> +{
> +	return bdev->rds_info.radio_text[i] & BCM2048_RDS_CRC_MASK;
> +}
> +
> +static void bcm2048_parse_rds_rt_block(struct bcm2048_device *bdev, int i,
> +					int index, int crc)
> +{
> +	/* Good data will overwrite poor data */
> +	if (crc) {
> +		if (!bdev->rds_info.rds_rt[index])
> +			bdev->rds_info.rds_rt[index] =
> +				bdev->rds_info.radio_text[i+1];
> +		if (!bdev->rds_info.rds_rt[index+1])
> +			bdev->rds_info.rds_rt[index+1] =
> +				bdev->rds_info.radio_text[i+2];
> +	} else {
> +		bdev->rds_info.rds_rt[index] = bdev->rds_info.radio_text[i+1];
> +		bdev->rds_info.rds_rt[index+1] =
> +			bdev->rds_info.radio_text[i+2];
> +	}
> +}
> +
> +static int bcm2048_parse_rt_match_b(struct bcm2048_device *bdev, int i)
> +{
> +	int crc, rt_id, rt_group_b, rt_ab, index = 0;
> +
> +	crc = bcm2048_rds_block_crc(bdev, i);
> +
> +	if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
> +		return -EIO;
> +
> +	if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
> +		BCM2048_RDS_BLOCK_B) {
> +
> +		rt_id = (bdev->rds_info.radio_text[i+1] &
> +			BCM2048_RDS_BLOCK_MASK);
> +		rt_group_b = bdev->rds_info.radio_text[i+1] &
> +			BCM2048_RDS_GROUP_AB_MASK;
> +		rt_ab = bdev->rds_info.radio_text[i+2] &
> +				BCM2048_RDS_RT_AB_MASK;
> +
> +		if (rt_group_b != bdev->rds_info.rds_rt_group_b) {
> +			memset(bdev->rds_info.rds_rt, 0,
> +				sizeof(bdev->rds_info.rds_rt));
> +			bdev->rds_info.rds_rt_group_b = rt_group_b;
> +		}
> +
> +		if (rt_id == BCM2048_RDS_RT) {
> +			/* A to B or (vice versa), means: clear screen */
> +			if (rt_ab != bdev->rds_info.rds_rt_ab) {
> +				memset(bdev->rds_info.rds_rt, 0,
> +					sizeof(bdev->rds_info.rds_rt));
> +				bdev->rds_info.rds_rt_ab = rt_ab;
> +			}
> +
> +			index = bdev->rds_info.radio_text[i+2] &
> +					BCM2048_RDS_RT_INDEX;
> +
> +			if (bdev->rds_info.rds_rt_group_b)
> +				index <<= 1;
> +			else
> +				index <<= 2;
> +
> +			return index;
> +		}
> +	}
> +
> +	return -EIO;
> +}
> +
> +static int bcm2048_parse_rt_match_c(struct bcm2048_device *bdev, int i,
> +					int index)
> +{
> +	int crc;
> +
> +	crc = bcm2048_rds_block_crc(bdev, i);
> +
> +	if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
> +		return 0;
> +
> +	BUG_ON((index+2) >= BCM2048_MAX_RDS_RT);
> +
> +	if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
> +		BCM2048_RDS_BLOCK_C) {
> +		if (bdev->rds_info.rds_rt_group_b)
> +			return 1;
> +		bcm2048_parse_rds_rt_block(bdev, i, index, crc);
> +		return 1;
> +	}
> +
> +	return 0;
> +}
> +
> +static void bcm2048_parse_rt_match_d(struct bcm2048_device *bdev, int i,
> +					int index)
> +{
> +	int crc;
> +
> +	crc = bcm2048_rds_block_crc(bdev, i);
> +
> +	if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
> +		return;
> +
> +	BUG_ON((index+4) >= BCM2048_MAX_RDS_RT);
> +
> +	if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
> +		BCM2048_RDS_BLOCK_D)
> +		bcm2048_parse_rds_rt_block(bdev, i, index+2, crc);
> +}
> +
> +static int bcm2048_parse_rds_rt(struct bcm2048_device *bdev)
> +{
> +	int i, index = 0, crc, match_b = 0, match_c = 0, match_d = 0;
> +
> +	for (i = 0; i < bdev->fifo_size; i += BCM2048_RDS_FIFO_DUPLE_SIZE) {
> +
> +		if (match_b) {
> +			match_b = 0;
> +			index = bcm2048_parse_rt_match_b(bdev, i);
> +			if (index >= 0 && index <= (BCM2048_MAX_RDS_RT - 5))
> +				match_c = 1;
> +			continue;
> +		} else if (match_c) {
> +			match_c = 0;
> +			if (bcm2048_parse_rt_match_c(bdev, i, index))
> +				match_d = 1;
> +			continue;
> +		} else if (match_d) {
> +			match_d = 0;
> +			bcm2048_parse_rt_match_d(bdev, i, index);
> +			continue;
> +		}
> +
> +		/* Skip erroneous blocks due to messed up A block altogether */
> +		if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK)
> +			== BCM2048_RDS_BLOCK_A) {
> +			crc = bcm2048_rds_block_crc(bdev, i);
> +			if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
> +				continue;
> +			/* Syncronize to a good RDS PI */
> +			if (((bdev->rds_info.radio_text[i+1] << 8) +
> +				bdev->rds_info.radio_text[i+2]) ==
> +				bdev->rds_info.rds_pi)
> +					match_b = 1;
> +		}
> +	}
> +
> +	return 0;
> +}
> +
> +static void bcm2048_parse_rds_ps_block(struct bcm2048_device *bdev, int i,
> +					int index, int crc)
> +{
> +	/* Good data will overwrite poor data */
> +	if (crc) {
> +		if (!bdev->rds_info.rds_ps[index])
> +			bdev->rds_info.rds_ps[index] =
> +				bdev->rds_info.radio_text[i+1];
> +		if (!bdev->rds_info.rds_ps[index+1])
> +			bdev->rds_info.rds_ps[index+1] =
> +				bdev->rds_info.radio_text[i+2];
> +	} else {
> +		bdev->rds_info.rds_ps[index] = bdev->rds_info.radio_text[i+1];
> +		bdev->rds_info.rds_ps[index+1] =
> +			bdev->rds_info.radio_text[i+2];
> +	}
> +}
> +
> +static int bcm2048_parse_ps_match_c(struct bcm2048_device *bdev, int i,
> +					int index)
> +{
> +	int crc;
> +
> +	crc = bcm2048_rds_block_crc(bdev, i);
> +
> +	if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
> +		return 0;
> +
> +	if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
> +		BCM2048_RDS_BLOCK_C)
> +		return 1;
> +
> +	return 0;
> +}
> +
> +static void bcm2048_parse_ps_match_d(struct bcm2048_device *bdev, int i,
> +					int index)
> +{
> +	int crc;
> +
> +	crc = bcm2048_rds_block_crc(bdev, i);
> +
> +	if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
> +		return;
> +
> +	if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
> +		BCM2048_RDS_BLOCK_D)
> +		bcm2048_parse_rds_ps_block(bdev, i, index, crc);
> +}
> +
> +static int bcm2048_parse_ps_match_b(struct bcm2048_device *bdev, int i)
> +{
> +	int crc, index, ps_id, ps_group;
> +
> +	crc = bcm2048_rds_block_crc(bdev, i);
> +
> +	if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
> +		return -EIO;
> +
> +	/* Block B Radio PS match */
> +	if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
> +		BCM2048_RDS_BLOCK_B) {
> +		ps_id = bdev->rds_info.radio_text[i+1] &
> +			BCM2048_RDS_BLOCK_MASK;
> +		ps_group = bdev->rds_info.radio_text[i+1] &
> +			BCM2048_RDS_GROUP_AB_MASK;
> +
> +		/*
> +		 * Poor RSSI will lead to RDS data corruption
> +		 * So using 3 (same) sequential values to justify major changes
> +		 */
> +		if (ps_group != bdev->rds_info.rds_ps_group) {
> +			if (crc == BCM2048_RDS_CRC_NONE) {
> +				bdev->rds_info.rds_ps_group_cnt++;
> +				if (bdev->rds_info.rds_ps_group_cnt > 2) {
> +					bdev->rds_info.rds_ps_group = ps_group;
> +					bdev->rds_info.rds_ps_group_cnt	= 0;
> +					dev_err(&bdev->client->dev,
> +						"RDS PS Group change!\n");
> +				} else {
> +					return -EIO;
> +				}
> +			} else {
> +				bdev->rds_info.rds_ps_group_cnt = 0;
> +			}
> +		}
> +
> +		if (ps_id == BCM2048_RDS_PS) {
> +			index = bdev->rds_info.radio_text[i+2] &
> +				BCM2048_RDS_PS_INDEX;
> +			index <<= 1;
> +			return index;
> +		}
> +	}
> +
> +	return -EIO;
> +}
> +
> +static void bcm2048_parse_rds_ps(struct bcm2048_device *bdev)
> +{
> +	int i, index = 0, crc, match_b = 0, match_c = 0, match_d = 0;
> +
> +	for (i = 0; i < bdev->fifo_size; i += BCM2048_RDS_FIFO_DUPLE_SIZE) {
> +
> +		if (match_b) {
> +			match_b = 0;
> +			index = bcm2048_parse_ps_match_b(bdev, i);
> +			if (index >= 0 && index < (BCM2048_MAX_RDS_PS - 1))
> +				match_c = 1;
> +			continue;
> +		} else if (match_c) {
> +			match_c = 0;
> +			if (bcm2048_parse_ps_match_c(bdev, i, index))
> +				match_d = 1;
> +			continue;
> +		} else if (match_d) {
> +			match_d = 0;
> +			bcm2048_parse_ps_match_d(bdev, i, index);
> +			continue;
> +		}
> +
> +		/* Skip erroneous blocks due to messed up A block altogether */
> +		if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK)
> +			== BCM2048_RDS_BLOCK_A) {
> +			crc = bcm2048_rds_block_crc(bdev, i);
> +			if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
> +				continue;
> +			/* Syncronize to a good RDS PI */
> +			if (((bdev->rds_info.radio_text[i+1] << 8) +
> +				bdev->rds_info.radio_text[i+2]) ==
> +				bdev->rds_info.rds_pi)
> +					match_b = 1;
> +		}
> +	}
> +}
> +
> +static void bcm2048_rds_fifo_receive(struct bcm2048_device *bdev)
> +{
> +	int err;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	err = bcm2048_recv_duples(bdev, BCM2048_I2C_RDS_DATA,
> +				bdev->rds_info.radio_text, bdev->fifo_size);
> +	if (err != 2) {
> +		dev_err(&bdev->client->dev, "RDS Read problem\n");
> +		return;
> +	}
> +
> +	bdev->rds_info.text_len = bdev->fifo_size;
> +
> +	bcm2048_parse_rds_pi(bdev);
> +	bcm2048_parse_rds_rt(bdev);
> +	bcm2048_parse_rds_ps(bdev);
> +
> +	mutex_unlock(&bdev->mutex);
> +
> +	wake_up_interruptible(&bdev->read_queue);
> +}
> +
> +static int bcm2048_get_rds_data(struct bcm2048_device *bdev, char *data)
> +{
> +	int err = 0, i, p = 0;
> +	char *data_buffer;
> +
> +	mutex_lock(&bdev->mutex);
> +
> +	if (!bdev->rds_info.text_len) {
> +		err = -EINVAL;
> +		goto unlock;
> +	}
> +
> +	data_buffer = kzalloc(BCM2048_MAX_RDS_RADIO_TEXT*5, GFP_KERNEL);
> +	if (!data_buffer) {
> +		err = -ENOMEM;
> +		goto unlock;
> +	}
> +
> +	for (i = 0; i < bdev->rds_info.text_len; i++) {
> +		p += sprintf(data_buffer+p, "%x ",
> +			bdev->rds_info.radio_text[i]);
> +	}
> +
> +	memcpy(data, data_buffer, p);
> +	kfree(data_buffer);
> +
> +unlock:
> +	mutex_unlock(&bdev->mutex);
> +	return err;
> +}
> +
> +/*
> + *	BCM2048 default initialization sequence
> + */
> +static int bcm2048_init(struct bcm2048_device *bdev)
> +{
> +	int err;
> +
> +	err = bcm2048_set_power_state(bdev, BCM2048_POWER_ON);
> +	if (err < 0)
> +		goto exit;
> +
> +	err = bcm2048_set_audio_route(bdev, BCM2048_AUDIO_ROUTE_DAC);
> +	if (err < 0)
> +		goto exit;
> +
> +	err = bcm2048_set_dac_output(bdev, BCM2048_DAC_OUTPUT_LEFT |
> +		BCM2048_DAC_OUTPUT_RIGHT);
> +
> +exit:
> +	return err;
> +}
> +
> +/*
> + *	BCM2048 default deinitialization sequence
> + */
> +static int bcm2048_deinit(struct bcm2048_device *bdev)
> +{
> +	int err;
> +
> +	err = bcm2048_set_audio_route(bdev, 0);
> +	if (err < 0)
> +		goto exit;
> +
> +	err = bcm2048_set_dac_output(bdev, 0);
> +	if (err < 0)
> +		goto exit;
> +
> +	err = bcm2048_set_power_state(bdev, BCM2048_POWER_OFF);
> +	if (err < 0)
> +		goto exit;
> +
> +exit:
> +	return err;
> +}
> +
> +/*
> + *	BCM2048 probe sequence
> + */
> +static int bcm2048_probe(struct bcm2048_device *bdev)
> +{
> +	int err;
> +
> +	err = bcm2048_set_power_state(bdev, BCM2048_POWER_ON);
> +	if (err < 0)
> +		goto unlock;
> +
> +	err = bcm2048_checkrev(bdev);
> +	if (err < 0)
> +		goto unlock;
> +
> +	err = bcm2048_set_mute(bdev, BCM2048_DEFAULT_MUTE);
> +	if (err < 0)
> +		goto unlock;
> +
> +	err = bcm2048_set_region(bdev, BCM2048_DEFAULT_REGION);
> +	if (err < 0)
> +		goto unlock;
> +
> +	err = bcm2048_set_fm_search_rssi_threshold(bdev,
> +					BCM2048_DEFAULT_RSSI_THRESHOLD);
> +	if (err < 0)
> +		goto unlock;
> +
> +	err = bcm2048_set_fm_automatic_stereo_mono(bdev, BCM2048_ITEM_ENABLED);
> +	if (err < 0)
> +		goto unlock;
> +
> +	err = bcm2048_get_rds_wline(bdev);
> +	if (err < BCM2048_DEFAULT_RDS_WLINE)
> +		err = bcm2048_set_rds_wline(bdev, BCM2048_DEFAULT_RDS_WLINE);
> +	if (err < 0)
> +		goto unlock;
> +
> +	err = bcm2048_set_power_state(bdev, BCM2048_POWER_OFF);
> +
> +	init_waitqueue_head(&bdev->read_queue);
> +	bdev->rds_data_available = 0;
> +	bdev->rd_index = 0;
> +	bdev->users = 0;
> +
> +unlock:
> +	return err;
> +}
> +
> +/*
> + *	BCM2048 workqueue handler
> + */
> +static void bcm2048_work(struct work_struct *work)
> +{
> +	struct bcm2048_device *bdev;
> +	u8 flag_lsb, flag_msb, flags;
> +
> +	bdev = container_of(work, struct bcm2048_device, work);
> +	bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_FLAG0, &flag_lsb);
> +	bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_FLAG1, &flag_msb);
> +
> +	if (flag_lsb & (BCM2048_FM_FLAG_SEARCH_TUNE_FINISHED |
> +			BCM2048_FM_FLAG_SEARCH_TUNE_FAIL)) {
> +
> +		if (flag_lsb & BCM2048_FM_FLAG_SEARCH_TUNE_FAIL)
> +			bdev->scan_state = BCM2048_SCAN_FAIL;
> +		else
> +			bdev->scan_state = BCM2048_SCAN_OK;
> +
> +		complete(&bdev->compl);
> +	}
> +
> +	if (flag_msb & BCM2048_RDS_FLAG_FIFO_WLINE) {
> +		bcm2048_rds_fifo_receive(bdev);
> +		if (bdev->rds_state) {
> +			flags =	BCM2048_RDS_FLAG_FIFO_WLINE;
> +			bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_MASK1,
> +						flags);
> +		}
> +		bdev->rds_data_available = 1;
> +		bdev->rd_index = 0; /* new data, new start */
> +	}
> +}
> +
> +/*
> + *	BCM2048 interrupt handler
> + */
> +static irqreturn_t bcm2048_handler(int irq, void *dev)
> +{
> +	struct bcm2048_device *bdev = dev;
> +
> +	dev_dbg(&bdev->client->dev, "IRQ called, queuing work\n");
> +	if (bdev->power_state)
> +		schedule_work(&bdev->work);
> +
> +	return IRQ_HANDLED;
> +}
> +
> +/*
> + *	BCM2048 sysfs interface definitions
> + */
> +#define property_write(prop, type, mask, check)				\
> +static ssize_t bcm2048_##prop##_write(struct device *dev,		\
> +					struct device_attribute *attr,	\
> +					const char *buf,		\
> +					size_t count)			\
> +{									\
> +	struct bcm2048_device *bdev = dev_get_drvdata(dev);		\
> +	type value;							\
> +	int err;							\
> +									\
> +	if (!bdev)							\
> +		return -ENODEV;						\
> +									\
> +	sscanf(buf, mask, &value);					\
> +									\
> +	if (check)							\
> +		return -EDOM;						\
> +									\
> +	err = bcm2048_set_##prop(bdev, value);				\
> +									\
> +	return err < 0 ? err : count;					\
> +}
> +
> +#define property_read(prop, size, mask)					\
> +static ssize_t bcm2048_##prop##_read(struct device *dev,		\
> +					struct device_attribute *attr,	\
> +					char *buf)			\
> +{									\
> +	struct bcm2048_device *bdev = dev_get_drvdata(dev);		\
> +	size value;							\
> +									\
> +	if (!bdev)							\
> +		return -ENODEV;						\
> +									\
> +	value = bcm2048_get_##prop(bdev);				\
> +									\
> +	if (value >= 0)							\
> +		value = sprintf(buf, mask "\n", value);			\
> +									\
> +	return value;							\
> +}
> +
> +#define property_signed_read(prop, size, mask)				\
> +static ssize_t bcm2048_##prop##_read(struct device *dev,		\
> +					struct device_attribute *attr,	\
> +					char *buf)			\
> +{									\
> +	struct bcm2048_device *bdev = dev_get_drvdata(dev);		\
> +	size value;							\
> +									\
> +	if (!bdev)							\
> +		return -ENODEV;						\
> +									\
> +	value = bcm2048_get_##prop(bdev);				\
> +									\
> +	value = sprintf(buf, mask "\n", value);				\
> +									\
> +	return value;							\
> +}
> +
> +#define DEFINE_SYSFS_PROPERTY(prop, signal, size, mask, check)		\
> +property_write(prop, signal size, mask, check)				\
> +property_read(prop, size, mask)
> +
> +#define property_str_read(prop, size)					\
> +static ssize_t bcm2048_##prop##_read(struct device *dev,		\
> +					struct device_attribute *attr,	\
> +					char *buf)			\
> +{									\
> +	struct bcm2048_device *bdev = dev_get_drvdata(dev);		\
> +	int count;							\
> +	u8 *out;							\
> +									\
> +	if (!bdev)							\
> +		return -ENODEV;						\
> +									\
> +	out = kzalloc(size + 1, GFP_KERNEL);				\
> +	if (!out)							\
> +		return -ENOMEM;						\
> +									\
> +	bcm2048_get_##prop(bdev, out);					\
> +	count = sprintf(buf, "%s\n", out);				\
> +									\
> +	kfree(out);							\
> +									\
> +	return count;							\
> +}
> +
> +DEFINE_SYSFS_PROPERTY(power_state, unsigned, int, "%u", 0)
> +DEFINE_SYSFS_PROPERTY(mute, unsigned, int, "%u", 0)
> +DEFINE_SYSFS_PROPERTY(audio_route, unsigned, int, "%u", 0)
> +DEFINE_SYSFS_PROPERTY(dac_output, unsigned, int, "%u", 0)
> +
> +DEFINE_SYSFS_PROPERTY(fm_hi_lo_injection, unsigned, int, "%u", 0)
> +DEFINE_SYSFS_PROPERTY(fm_frequency, unsigned, int, "%u", 0)
> +DEFINE_SYSFS_PROPERTY(fm_af_frequency, unsigned, int, "%u", 0)
> +DEFINE_SYSFS_PROPERTY(fm_deemphasis, unsigned, int, "%u", 0)
> +DEFINE_SYSFS_PROPERTY(fm_rds_mask, unsigned, int, "%u", 0)
> +DEFINE_SYSFS_PROPERTY(fm_best_tune_mode, unsigned, int, "%u", 0)
> +DEFINE_SYSFS_PROPERTY(fm_search_rssi_threshold, unsigned, int, "%u", 0)
> +DEFINE_SYSFS_PROPERTY(fm_search_mode_direction, unsigned, int, "%u", 0)
> +DEFINE_SYSFS_PROPERTY(fm_search_tune_mode, unsigned, int, "%u", value > 3)
> +
> +DEFINE_SYSFS_PROPERTY(rds, unsigned, int, "%u", 0)
> +DEFINE_SYSFS_PROPERTY(rds_b_block_mask, unsigned, int, "%u", 0)
> +DEFINE_SYSFS_PROPERTY(rds_b_block_match, unsigned, int, "%u", 0)
> +DEFINE_SYSFS_PROPERTY(rds_pi_mask, unsigned, int, "%u", 0)
> +DEFINE_SYSFS_PROPERTY(rds_pi_match, unsigned, int, "%u", 0)
> +DEFINE_SYSFS_PROPERTY(rds_wline, unsigned, int, "%u", 0)
> +property_read(rds_pi, unsigned int, "%x")
> +property_str_read(rds_rt, (BCM2048_MAX_RDS_RT + 1))
> +property_str_read(rds_ps, (BCM2048_MAX_RDS_PS + 1))
> +
> +property_read(fm_rds_flags, unsigned int, "%u")
> +property_str_read(rds_data, BCM2048_MAX_RDS_RADIO_TEXT*5)
> +
> +property_read(region_bottom_frequency, unsigned int, "%u")
> +property_read(region_top_frequency, unsigned int, "%u")
> +property_signed_read(fm_carrier_error, int, "%d")
> +property_signed_read(fm_rssi, int, "%d")
> +DEFINE_SYSFS_PROPERTY(region, unsigned, int, "%u", 0)
> +
> +static struct device_attribute attrs[] = {
> +	__ATTR(power_state, S_IRUGO | S_IWUSR, bcm2048_power_state_read,
> +		bcm2048_power_state_write),
> +	__ATTR(mute, S_IRUGO | S_IWUSR, bcm2048_mute_read,
> +		bcm2048_mute_write),
> +	__ATTR(audio_route, S_IRUGO | S_IWUSR, bcm2048_audio_route_read,
> +		bcm2048_audio_route_write),
> +	__ATTR(dac_output, S_IRUGO | S_IWUSR, bcm2048_dac_output_read,
> +		bcm2048_dac_output_write),
> +	__ATTR(fm_hi_lo_injection, S_IRUGO | S_IWUSR,
> +		bcm2048_fm_hi_lo_injection_read,
> +		bcm2048_fm_hi_lo_injection_write),
> +	__ATTR(fm_frequency, S_IRUGO | S_IWUSR, bcm2048_fm_frequency_read,
> +		bcm2048_fm_frequency_write),
> +	__ATTR(fm_af_frequency, S_IRUGO | S_IWUSR,
> +		bcm2048_fm_af_frequency_read,
> +		bcm2048_fm_af_frequency_write),
> +	__ATTR(fm_deemphasis, S_IRUGO | S_IWUSR, bcm2048_fm_deemphasis_read,
> +		bcm2048_fm_deemphasis_write),
> +	__ATTR(fm_rds_mask, S_IRUGO | S_IWUSR, bcm2048_fm_rds_mask_read,
> +		bcm2048_fm_rds_mask_write),
> +	__ATTR(fm_best_tune_mode, S_IRUGO | S_IWUSR,
> +		bcm2048_fm_best_tune_mode_read,
> +		bcm2048_fm_best_tune_mode_write),
> +	__ATTR(fm_search_rssi_threshold, S_IRUGO | S_IWUSR,
> +		bcm2048_fm_search_rssi_threshold_read,
> +		bcm2048_fm_search_rssi_threshold_write),
> +	__ATTR(fm_search_mode_direction, S_IRUGO | S_IWUSR,
> +		bcm2048_fm_search_mode_direction_read,
> +		bcm2048_fm_search_mode_direction_write),
> +	__ATTR(fm_search_tune_mode, S_IRUGO | S_IWUSR,
> +		bcm2048_fm_search_tune_mode_read,
> +		bcm2048_fm_search_tune_mode_write),
> +	__ATTR(rds, S_IRUGO | S_IWUSR, bcm2048_rds_read,
> +		bcm2048_rds_write),
> +	__ATTR(rds_b_block_mask, S_IRUGO | S_IWUSR,
> +		bcm2048_rds_b_block_mask_read,
> +		bcm2048_rds_b_block_mask_write),
> +	__ATTR(rds_b_block_match, S_IRUGO | S_IWUSR,
> +		bcm2048_rds_b_block_match_read,
> +		bcm2048_rds_b_block_match_write),
> +	__ATTR(rds_pi_mask, S_IRUGO | S_IWUSR, bcm2048_rds_pi_mask_read,
> +		bcm2048_rds_pi_mask_write),
> +	__ATTR(rds_pi_match, S_IRUGO | S_IWUSR, bcm2048_rds_pi_match_read,
> +		bcm2048_rds_pi_match_write),
> +	__ATTR(rds_wline, S_IRUGO | S_IWUSR, bcm2048_rds_wline_read,
> +		bcm2048_rds_wline_write),
> +	__ATTR(rds_pi, S_IRUGO, bcm2048_rds_pi_read, NULL),
> +	__ATTR(rds_rt, S_IRUGO, bcm2048_rds_rt_read, NULL),
> +	__ATTR(rds_ps, S_IRUGO, bcm2048_rds_ps_read, NULL),
> +	__ATTR(fm_rds_flags, S_IRUGO, bcm2048_fm_rds_flags_read, NULL),
> +	__ATTR(region_bottom_frequency, S_IRUGO,
> +		bcm2048_region_bottom_frequency_read, NULL),
> +	__ATTR(region_top_frequency, S_IRUGO,
> +		bcm2048_region_top_frequency_read, NULL),
> +	__ATTR(fm_carrier_error, S_IRUGO,
> +		bcm2048_fm_carrier_error_read, NULL),
> +	__ATTR(fm_rssi, S_IRUGO,
> +		bcm2048_fm_rssi_read, NULL),
> +	__ATTR(region, S_IRUGO | S_IWUSR, bcm2048_region_read,
> +		bcm2048_region_write),
> +	__ATTR(rds_data, S_IRUGO, bcm2048_rds_data_read, NULL),
> +};
> +
> +static int bcm2048_sysfs_unregister_properties(struct bcm2048_device *bdev,
> +						int size)
> +{
> +	int i;
> +
> +	for (i = 0; i < size; i++)
> +		device_remove_file(&bdev->client->dev, &attrs[i]);
> +
> +	return 0;
> +}
> +
> +static int bcm2048_sysfs_register_properties(struct bcm2048_device *bdev)
> +{
> +	int err = 0;
> +	int i;
> +
> +	for (i = 0; i < ARRAY_SIZE(attrs); i++) {
> +		if (device_create_file(&bdev->client->dev, &attrs[i]) != 0) {
> +			dev_err(&bdev->client->dev,
> +					"could not register sysfs entry\n");
> +			err = -EBUSY;
> +			bcm2048_sysfs_unregister_properties(bdev, i);
> +			break;
> +		}
> +	}
> +
> +	return err;
> +}
> +
> +
> +static int bcm2048_fops_open(struct file *file)
> +{
> +	struct bcm2048_device *bdev = video_drvdata(file);
> +
> +	bdev->users++;
> +	bdev->rd_index = 0;
> +	bdev->rds_data_available = 0;
> +
> +	return 0;
> +}
> +
> +static int bcm2048_fops_release(struct file *file)
> +{
> +	struct bcm2048_device *bdev = video_drvdata(file);
> +
> +	bdev->users--;
> +
> +	return 0;
> +}
> +
> +static unsigned int bcm2048_fops_poll(struct file *file,
> +		struct poll_table_struct *pts)
> +{
> +	struct bcm2048_device *bdev = video_drvdata(file);
> +	int retval = 0;
> +
> +	poll_wait(file, &bdev->read_queue, pts);
> +
> +	if (bdev->rds_data_available)
> +		retval = POLLIN | POLLRDNORM;
> +
> +	return retval;
> +}
> +
> +static ssize_t bcm2048_fops_read(struct file *file, char __user *buf,
> +	size_t count, loff_t *ppos)
> +{
> +	struct bcm2048_device *bdev = video_drvdata(file);
> +	int i;
> +	int retval = 0;
> +
> +	/* we return at least 3 bytes, one block */
> +	count = (count / 3) * 3; /* only multiples of 3 */
> +	if (count < 3)
> +		return -ENOBUFS;
> +
> +	while (!bdev->rds_data_available) {
> +		if (file->f_flags & O_NONBLOCK) {
> +			retval = -EWOULDBLOCK;
> +			goto done;
> +		}
> +		/* interruptible_sleep_on(&bdev->read_queue); */
> +		if (wait_event_interruptible(bdev->read_queue,
> +			bdev->rds_data_available) < 0) {
> +			retval = -EINTR;
> +			goto done;
> +		}
> +	}
> +
> +	mutex_lock(&bdev->mutex);
> +	/* copy data to userspace */
> +	i = bdev->fifo_size - bdev->rd_index;
> +	if (count > i)
> +		count = (i / 3) * 3;
> +
> +	i = 0;
> +	while (i < count) {
> +		unsigned char tmpbuf[3];
> +		tmpbuf[i] = bdev->rds_info.radio_text[bdev->rd_index+i+2];
> +		tmpbuf[i+1] = bdev->rds_info.radio_text[bdev->rd_index+i+1];
> +		tmpbuf[i+2] = ((bdev->rds_info.radio_text[bdev->rd_index+i]
> +				& 0xf0) >> 4);
> +		if ((bdev->rds_info.radio_text[bdev->rd_index+i] &
> +			BCM2048_RDS_CRC_MASK) == BCM2048_RDS_CRC_UNRECOVARABLE)
> +			tmpbuf[i+2] |= 0x80;
> +		if (copy_to_user(buf+i, tmpbuf, 3)) {
> +			retval = -EFAULT;
> +			break;
> +		};
> +		i += 3;
> +	}
> +
> +	bdev->rd_index += i;
> +	if (bdev->rd_index >= bdev->fifo_size)
> +		bdev->rds_data_available = 0;
> +
> +	mutex_unlock(&bdev->mutex);
> +	if (retval == 0)
> +		retval = i;
> +
> +done:
> +	return retval;
> +}
> +
> +/*
> + *	bcm2048_fops - file operations interface
> + */
> +static const struct v4l2_file_operations bcm2048_fops = {
> +	.owner		= THIS_MODULE,
> +	.ioctl		= video_ioctl2,
> +	/* for RDS read support */
> +	.open		= bcm2048_fops_open,
> +	.release	= bcm2048_fops_release,
> +	.read		= bcm2048_fops_read,
> +	.poll		= bcm2048_fops_poll
> +};
> +
> +/*
> + *	Video4Linux Interface
> + */
> +static struct v4l2_queryctrl bcm2048_v4l2_queryctrl[] = {
> +	{
> +		.id		= V4L2_CID_AUDIO_VOLUME,
> +		.flags		= V4L2_CTRL_FLAG_DISABLED,
> +	},
> +	{
> +		.id		= V4L2_CID_AUDIO_BALANCE,
> +		.flags		= V4L2_CTRL_FLAG_DISABLED,
> +	},
> +	{
> +		.id		= V4L2_CID_AUDIO_BASS,
> +		.flags		= V4L2_CTRL_FLAG_DISABLED,
> +	},
> +	{
> +		.id		= V4L2_CID_AUDIO_TREBLE,
> +		.flags		= V4L2_CTRL_FLAG_DISABLED,
> +	},
> +	{
> +		.id		= V4L2_CID_AUDIO_MUTE,
> +		.type		= V4L2_CTRL_TYPE_BOOLEAN,
> +		.name		= "Mute",
> +		.minimum	= 0,
> +		.maximum	= 1,
> +		.step		= 1,
> +		.default_value	= 1,
> +	},
> +	{
> +		.id		= V4L2_CID_AUDIO_LOUDNESS,
> +		.flags		= V4L2_CTRL_FLAG_DISABLED,
> +	},
> +};
> +
> +static int bcm2048_vidioc_querycap(struct file *file, void *priv,
> +		struct v4l2_capability *capability)
> +{
> +	struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
> +
> +	strlcpy(capability->driver, BCM2048_DRIVER_NAME,
> +		sizeof(capability->driver));
> +	strlcpy(capability->card, BCM2048_DRIVER_CARD,
> +		sizeof(capability->card));
> +	snprintf(capability->bus_info, 32, "I2C: 0x%X", bdev->client->addr);
> +	capability->version = BCM2048_DRIVER_VERSION;
> +	capability->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO |
> +					V4L2_CAP_HW_FREQ_SEEK;
> +
> +	return 0;
> +}
> +
> +static int bcm2048_vidioc_g_input(struct file *filp, void *priv,
> +		unsigned int *i)
> +{
> +	*i = 0;
> +
> +	return 0;
> +}
> +
> +static int bcm2048_vidioc_s_input(struct file *filp, void *priv,
> +					unsigned int i)
> +{
> +	if (i)
> +		return -EINVAL;
> +
> +	return 0;
> +}
> +
> +static int bcm2048_vidioc_queryctrl(struct file *file, void *priv,
> +		struct v4l2_queryctrl *qc)
> +{
> +	int i;
> +
> +	for (i = 0; i < ARRAY_SIZE(bcm2048_v4l2_queryctrl); i++) {
> +		if (qc->id && qc->id == bcm2048_v4l2_queryctrl[i].id) {
> +			memcpy(qc, &(bcm2048_v4l2_queryctrl[i]), sizeof(*qc));
> +			return 0;
> +		}
> +	}
> +
> +	return -EINVAL;
> +}
> +
> +static int bcm2048_vidioc_g_ctrl(struct file *file, void *priv,
> +		struct v4l2_control *ctrl)
> +{
> +	struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
> +	int err = 0;
> +
> +	if (!bdev)
> +		return -ENODEV;
> +
> +	switch (ctrl->id) {
> +	case V4L2_CID_AUDIO_MUTE:
> +		err = bcm2048_get_mute(bdev);
> +		if (err >= 0)
> +			ctrl->value = err;
> +		break;
> +	}
> +
> +	return err;
> +}
> +
> +static int bcm2048_vidioc_s_ctrl(struct file *file, void *priv,
> +		struct v4l2_control *ctrl)
> +{
> +	struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
> +	int err = 0;
> +
> +	if (!bdev)
> +		return -ENODEV;
> +
> +	switch (ctrl->id) {
> +	case V4L2_CID_AUDIO_MUTE:
> +		if (ctrl->value) {
> +			if (bdev->power_state) {
> +				err = bcm2048_set_mute(bdev, ctrl->value);
> +				err |= bcm2048_deinit(bdev);
> +			}
> +		} else {
> +			if (!bdev->power_state) {
> +				err = bcm2048_init(bdev);
> +				err |= bcm2048_set_mute(bdev, ctrl->value);
> +			}
> +		}
> +		break;
> +	}
> +
> +	return err;
> +}
> +
> +static int bcm2048_vidioc_g_audio(struct file *file, void *priv,
> +		struct v4l2_audio *audio)
> +{
> +	if (audio->index > 1)
> +		return -EINVAL;
> +
> +	strncpy(audio->name, "Radio", 32);
> +	audio->capability = V4L2_AUDCAP_STEREO;
> +
> +	return 0;
> +}
> +
> +static int bcm2048_vidioc_s_audio(struct file *file, void *priv,
> +		const struct v4l2_audio *audio)
> +{
> +	if (audio->index != 0)
> +		return -EINVAL;
> +
> +	return 0;
> +}
> +
> +static int bcm2048_vidioc_g_tuner(struct file *file, void *priv,
> +		struct v4l2_tuner *tuner)
> +{
> +	struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
> +	s8 f_error;
> +	s8 rssi;
> +
> +	if (!bdev)
> +		return -ENODEV;
> +
> +	if (tuner->index > 0)
> +		return -EINVAL;
> +
> +	strncpy(tuner->name, "FM Receiver", 32);
> +	tuner->type = V4L2_TUNER_RADIO;
> +	tuner->rangelow =
> +		dev_to_v4l2(bcm2048_get_region_bottom_frequency(bdev));
> +	tuner->rangehigh =
> +		dev_to_v4l2(bcm2048_get_region_top_frequency(bdev));
> +	tuner->rxsubchans = V4L2_TUNER_SUB_STEREO;
> +	tuner->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW;
> +	tuner->audmode = V4L2_TUNER_MODE_STEREO;
> +	tuner->afc = 0;
> +	if (bdev->power_state) {
> +		/*
> +		 * Report frequencies with high carrier errors to have zero
> +		 * signal level
> +		 */
> +		f_error = bcm2048_get_fm_carrier_error(bdev);
> +		if (f_error < BCM2048_FREQ_ERROR_FLOOR ||
> +		    f_error > BCM2048_FREQ_ERROR_ROOF) {
> +			tuner->signal = 0;
> +		} else {
> +			/*
> +			 * RSSI level -60 dB is defined to report full
> +			 * signal strenght
> +			 */
> +			rssi = bcm2048_get_fm_rssi(bdev);
> +			if (rssi >= BCM2048_RSSI_LEVEL_BASE) {
> +				tuner->signal = 0xFFFF;
> +			} else if (rssi > BCM2048_RSSI_LEVEL_ROOF) {
> +				tuner->signal = (rssi +
> +						 BCM2048_RSSI_LEVEL_ROOF_NEG)
> +						 * BCM2048_SIGNAL_MULTIPLIER;
> +			} else {
> +				tuner->signal = 0;
> +			}
> +		}
> +	} else {
> +		tuner->signal = 0;
> +	}
> +
> +	return 0;
> +}
> +
> +static int bcm2048_vidioc_s_tuner(struct file *file, void *priv,
> +		const struct v4l2_tuner *tuner)
> +{
> +	struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
> +
> +	if (!bdev)
> +		return -ENODEV;
> +
> +	if (tuner->index > 0)
> +		return -EINVAL;
> +
> +	return 0;
> +}
> +
> +static int bcm2048_vidioc_g_frequency(struct file *file, void *priv,
> +		struct v4l2_frequency *freq)
> +{
> +	struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
> +	int err = 0;
> +	int f;
> +
> +	if (!bdev->power_state)
> +		return -ENODEV;
> +
> +	freq->type = V4L2_TUNER_RADIO;
> +	f = bcm2048_get_fm_frequency(bdev);
> +
> +	if (f < 0)
> +		err = f;
> +	else
> +		freq->frequency = dev_to_v4l2(f);
> +
> +	return err;
> +}
> +
> +static int bcm2048_vidioc_s_frequency(struct file *file, void *priv,
> +		const struct v4l2_frequency *freq)
> +{
> +	struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
> +	int err;
> +
> +	if (freq->type != V4L2_TUNER_RADIO)
> +		return -EINVAL;
> +
> +	if (!bdev->power_state)
> +		return -ENODEV;
> +
> +	err = bcm2048_set_fm_frequency(bdev, v4l2_to_dev(freq->frequency));
> +	err |= bcm2048_set_fm_search_tune_mode(bdev, BCM2048_FM_PRE_SET_MODE);
> +
> +	return err;
> +}
> +
> +static int bcm2048_vidioc_s_hw_freq_seek(struct file *file, void *priv,
> +					const struct v4l2_hw_freq_seek *seek)
> +{
> +	struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
> +	int err;
> +
> +	if (!bdev->power_state)
> +		return -ENODEV;
> +
> +	if ((seek->tuner != 0) || (seek->type != V4L2_TUNER_RADIO))
> +		return -EINVAL;
> +
> +	err = bcm2048_set_fm_search_mode_direction(bdev, seek->seek_upward);
> +	err |= bcm2048_set_fm_search_tune_mode(bdev,
> +			BCM2048_FM_AUTO_SEARCH_MODE);
> +
> +	return err;
> +}
> +
> +static struct v4l2_ioctl_ops bcm2048_ioctl_ops = {
> +	.vidioc_querycap	= bcm2048_vidioc_querycap,
> +	.vidioc_g_input		= bcm2048_vidioc_g_input,
> +	.vidioc_s_input		= bcm2048_vidioc_s_input,
> +	.vidioc_queryctrl	= bcm2048_vidioc_queryctrl,
> +	.vidioc_g_ctrl		= bcm2048_vidioc_g_ctrl,
> +	.vidioc_s_ctrl		= bcm2048_vidioc_s_ctrl,
> +	.vidioc_g_audio		= bcm2048_vidioc_g_audio,
> +	.vidioc_s_audio		= bcm2048_vidioc_s_audio,
> +	.vidioc_g_tuner		= bcm2048_vidioc_g_tuner,
> +	.vidioc_s_tuner		= bcm2048_vidioc_s_tuner,
> +	.vidioc_g_frequency	= bcm2048_vidioc_g_frequency,
> +	.vidioc_s_frequency	= bcm2048_vidioc_s_frequency,
> +	.vidioc_s_hw_freq_seek  = bcm2048_vidioc_s_hw_freq_seek,
> +};
> +
> +/*
> + * bcm2048_viddev_template - video device interface
> + */
> +static struct video_device bcm2048_viddev_template = {
> +	.fops			= &bcm2048_fops,
> +	.name			= BCM2048_DRIVER_NAME,
> +	.release		= video_device_release,
> +	.ioctl_ops		= &bcm2048_ioctl_ops,
> +};
> +
> +/*
> + *	I2C driver interface
> + */
> +static int bcm2048_i2c_driver_probe(struct i2c_client *client,
> +					const struct i2c_device_id *id)
> +{
> +	struct bcm2048_device *bdev;
> +	int err, skip_release = 0;
> +
> +	bdev = kzalloc(sizeof(*bdev), GFP_KERNEL);
> +	if (!bdev) {
> +		dev_dbg(&client->dev, "Failed to alloc video device.\n");
> +		err = -ENOMEM;
> +		goto exit;
> +	}
> +
> +	bdev->videodev = video_device_alloc();
> +	if (!bdev->videodev) {
> +		dev_dbg(&client->dev, "Failed to alloc video device.\n");
> +		err = -ENOMEM;
> +		goto free_bdev;
> +	}
> +
> +	bdev->client = client;
> +	i2c_set_clientdata(client, bdev);
> +	mutex_init(&bdev->mutex);
> +	init_completion(&bdev->compl);
> +	INIT_WORK(&bdev->work, bcm2048_work);
> +
> +	if (client->irq) {
> +		err = request_irq(client->irq,
> +			bcm2048_handler, IRQF_TRIGGER_FALLING | IRQF_DISABLED,
> +			client->name, bdev);
> +		if (err < 0) {
> +			dev_err(&client->dev, "Could not request IRQ\n");
> +			goto free_vdev;
> +		}
> +		dev_dbg(&client->dev, "IRQ requested.\n");
> +	} else {
> +		dev_dbg(&client->dev, "IRQ not configured. Using timeouts.\n");
> +	}
> +
> +	memcpy(bdev->videodev, &bcm2048_viddev_template,
> +			sizeof(bcm2048_viddev_template));
> +	video_set_drvdata(bdev->videodev, bdev);
> +	if (video_register_device(bdev->videodev, VFL_TYPE_RADIO, radio_nr)) {
> +		dev_dbg(&client->dev, "Could not register video device.\n");
> +		err = -EIO;
> +		goto free_irq;
> +	}
> +
> +	err = bcm2048_sysfs_register_properties(bdev);
> +	if (err < 0) {
> +		dev_dbg(&client->dev, "Could not register sysfs interface.\n");
> +		goto free_registration;
> +	}
> +
> +	err = bcm2048_probe(bdev);
> +	if (err < 0) {
> +		dev_dbg(&client->dev, "Failed to probe device information.\n");
> +		goto free_sysfs;
> +	}
> +
> +	return 0;
> +
> +free_sysfs:
> +	bcm2048_sysfs_unregister_properties(bdev, ARRAY_SIZE(attrs));
> +free_registration:
> +	video_unregister_device(bdev->videodev);
> +	/* video_unregister_device frees bdev->videodev */
> +	bdev->videodev = NULL;
> +	skip_release = 1;
> +free_irq:
> +	if (client->irq)
> +		free_irq(client->irq, bdev);
> +free_vdev:
> +	if (!skip_release)
> +		video_device_release(bdev->videodev);
> +	i2c_set_clientdata(client, NULL);
> +free_bdev:
> +	kfree(bdev);
> +exit:
> +	return err;
> +}
> +
> +static int __exit bcm2048_i2c_driver_remove(struct i2c_client *client)
> +{
> +	struct bcm2048_device *bdev = i2c_get_clientdata(client);
> +	struct video_device *vd;
> +
> +	if (!client->adapter)
> +		return -ENODEV;
> +
> +	if (bdev) {
> +		vd = bdev->videodev;
> +
> +		bcm2048_sysfs_unregister_properties(bdev, ARRAY_SIZE(attrs));
> +
> +		if (vd)
> +			video_unregister_device(vd);
> +
> +		if (bdev->power_state)
> +			bcm2048_set_power_state(bdev, BCM2048_POWER_OFF);
> +
> +		if (client->irq > 0)
> +			free_irq(client->irq, bdev);
> +
> +		cancel_work_sync(&bdev->work);
> +
> +		kfree(bdev);
> +	}
> +
> +	i2c_set_clientdata(client, NULL);
> +
> +	return 0;
> +}
> +
> +/*
> + *	bcm2048_i2c_driver - i2c driver interface
> + */
> +static const struct i2c_device_id bcm2048_id[] = {
> +	{ "bcm2048" , 0 },
> +	{ },
> +};
> +MODULE_DEVICE_TABLE(i2c, bcm2048_id);
> +
> +static struct i2c_driver bcm2048_i2c_driver = {
> +	.driver		= {
> +		.name	= BCM2048_DRIVER_NAME,
> +	},
> +	.probe		= bcm2048_i2c_driver_probe,
> +	.remove		= __exit_p(bcm2048_i2c_driver_remove),
> +	.id_table	= bcm2048_id,
> +};
> +
> +/*
> + *	Module Interface
> + */
> +static int __init bcm2048_module_init(void)
> +{
> +	pr_info(BCM2048_DRIVER_DESC "\n");
> +
> +	return i2c_add_driver(&bcm2048_i2c_driver);
> +}
> +module_init(bcm2048_module_init);
> +
> +static void __exit bcm2048_module_exit(void)
> +{
> +	i2c_del_driver(&bcm2048_i2c_driver);
> +}
> +module_exit(bcm2048_module_exit);
> +
> +MODULE_LICENSE("GPL");
> +MODULE_AUTHOR(BCM2048_DRIVER_AUTHOR);
> +MODULE_DESCRIPTION(BCM2048_DRIVER_DESC);
> +MODULE_VERSION("0.0.2");
> diff --git a/include/media/radio-bcm2048.h b/include/media/radio-bcm2048.h
> new file mode 100644
> index 0000000..61f52aa
> --- /dev/null
> +++ b/include/media/radio-bcm2048.h
> @@ -0,0 +1,30 @@
> +/*
> + * drivers/media/radio/radio-bcm2048.h
> + *
> + * Property and command definitions for bcm2048 radio receiver chip.
> + *
> + * Copyright (C) Nokia Corporation
> + * Contact: Eero Nurkkala <ext-eero.nurkkala@nokia.com>
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License
> + * version 2 as published by the Free Software Foundation.
> + *
> + * 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., 51 Franklin St, Fifth Floor, Boston, MA
> + * 02110-1301 USA
> + */
> +
> +#ifndef BCM2048_H
> +#define BCM2048_H
> +
> +#define BCM2048_NAME		"bcm2048"
> +#define BCM2048_I2C_ADDR	0x22
> +
> +#endif	/* ifndef BCM2048_H */
> 

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Pali Rohár Oct. 17, 2013, 7:31 p.m. UTC | #2 
Hello,

so what do you suggest? Add it to staging for now (or not)?

On Tuesday 15 October 2013 17:08:39 Hans Verkuil wrote:
> Hi Pali,
> 
> Thanks for the patch, but I am afraid it will need some work
> to make this acceptable for inclusion into the kernel.
> 
> The main thing you need to do is to implement all the controls
> using the control framework (see
> Documentation/video4linux/v4l2-controls.txt). Most drivers
> are by now converted to the control framework, so you will
> find many examples of how to do this in drivers/media/radio.
> 
> The sysfs stuff should be replaced by controls as well. A lot
> of the RDS support is now available as controls (although
> there may well be some missing features, but that is easy
> enough to add). Since the RDS data is actually read() from
> the device I am not sure whether the RDS properties/controls
> should be there at all.
> 
> Finally this driver should probably be split up into two
> parts: one v4l2_subdev-based core driver and one platform
> driver. See e.g. radio-si4713/si4713-i2c.c as a good example.
> But I would wait with that until the rest of the driver is
> cleaned up. Then I have a better idea of whether this is
> necessary or not.
> 
> It's also very useful to run v4l2-compliance (available in the
> v4l-utils.git repo on git.linuxtv.org). That does lots of
> sanity checks.
> 
> Another option is to add the driver as-is to
> drivers/staging/media, and clean it up bit by bit.
> 
> Regards,
> 
> 	Hans
> 
> On 10/15/2013 04:26 PM, Pali Rohár wrote:
> > This adds support for the BCM2048 radio module found in
> > Nokia N900
> > 
> > Signed-off-by: Eero Nurkkala <ext-eero.nurkkala@nokia.com>
> > Signed-off-by: Nils Faerber <nils.faerber@kernelconcepts.de>
> > Signed-off-by: Joni Lapilainen <joni.lapilainen@gmail.com>
> > Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
> > ---
> > 
> >  drivers/media/radio/Kconfig         |   10 +
> >  drivers/media/radio/Makefile        |    1 +
> >  drivers/media/radio/radio-bcm2048.c | 2744
> >  +++++++++++++++++++++++++++++++++++
> >  include/media/radio-bcm2048.h       |   30 +
> >  4 files changed, 2785 insertions(+)
> >  create mode 100644 drivers/media/radio/radio-bcm2048.c
> >  create mode 100644 include/media/radio-bcm2048.h
> >
Pali Rohár Oct. 26, 2013, 8:04 p.m. UTC | #3 
Hans, so can it be added to drivers/staging/media tree?

On Thursday 17 October 2013 21:31:04 Pali Rohár wrote:
> Hello,
> 
> so what do you suggest? Add it to staging for now (or not)?
> 
> On Tuesday 15 October 2013 17:08:39 Hans Verkuil wrote:
> > Hi Pali,
> > 
> > Thanks for the patch, but I am afraid it will need some work
> > to make this acceptable for inclusion into the kernel.
> > 
> > The main thing you need to do is to implement all the
> > controls using the control framework (see
> > Documentation/video4linux/v4l2-controls.txt). Most drivers
> > are by now converted to the control framework, so you will
> > find many examples of how to do this in drivers/media/radio.
> > 
> > The sysfs stuff should be replaced by controls as well. A
> > lot of the RDS support is now available as controls
> > (although there may well be some missing features, but that
> > is easy enough to add). Since the RDS data is actually
> > read() from the device I am not sure whether the RDS
> > properties/controls should be there at all.
> > 
> > Finally this driver should probably be split up into two
> > parts: one v4l2_subdev-based core driver and one platform
> > driver. See e.g. radio-si4713/si4713-i2c.c as a good
> > example. But I would wait with that until the rest of the
> > driver is cleaned up. Then I have a better idea of whether
> > this is necessary or not.
> > 
> > It's also very useful to run v4l2-compliance (available in
> > the v4l-utils.git repo on git.linuxtv.org). That does lots
> > of sanity checks.
> > 
> > Another option is to add the driver as-is to
> > drivers/staging/media, and clean it up bit by bit.
> > 
> > Regards,
> > 
> > 	Hans
> > 
> > On 10/15/2013 04:26 PM, Pali Rohár wrote:
> > > This adds support for the BCM2048 radio module found in
> > > Nokia N900
> > > 
> > > Signed-off-by: Eero Nurkkala <ext-eero.nurkkala@nokia.com>
> > > Signed-off-by: Nils Faerber
> > > <nils.faerber@kernelconcepts.de> Signed-off-by: Joni
> > > Lapilainen <joni.lapilainen@gmail.com> Signed-off-by:
> > > Pali Rohár <pali.rohar@gmail.com>
> > > ---
> > > 
> > >  drivers/media/radio/Kconfig         |   10 +
> > >  drivers/media/radio/Makefile        |    1 +
> > >  drivers/media/radio/radio-bcm2048.c | 2744
> > >  +++++++++++++++++++++++++++++++++++
> > >  include/media/radio-bcm2048.h       |   30 +
> > >  4 files changed, 2785 insertions(+)
> > >  create mode 100644 drivers/media/radio/radio-bcm2048.c
> > >  create mode 100644 include/media/radio-bcm2048.h
Hans Verkuil Oct. 26, 2013, 8:22 p.m. UTC | #4 
> Hans, so can it be added to drivers/staging/media tree?

Yes, that is an option. It's up to you to decide what you want. Note that
if no cleanup work is done on the staging driver for a long time, then it
can be removed again.

Regards,

    Hans

>
> On Thursday 17 October 2013 21:31:04 Pali Rohár wrote:
>> Hello,
>>
>> so what do you suggest? Add it to staging for now (or not)?
>>
>> On Tuesday 15 October 2013 17:08:39 Hans Verkuil wrote:
>> > Hi Pali,
>> >
>> > Thanks for the patch, but I am afraid it will need some work
>> > to make this acceptable for inclusion into the kernel.
>> >
>> > The main thing you need to do is to implement all the
>> > controls using the control framework (see
>> > Documentation/video4linux/v4l2-controls.txt). Most drivers
>> > are by now converted to the control framework, so you will
>> > find many examples of how to do this in drivers/media/radio.
>> >
>> > The sysfs stuff should be replaced by controls as well. A
>> > lot of the RDS support is now available as controls
>> > (although there may well be some missing features, but that
>> > is easy enough to add). Since the RDS data is actually
>> > read() from the device I am not sure whether the RDS
>> > properties/controls should be there at all.
>> >
>> > Finally this driver should probably be split up into two
>> > parts: one v4l2_subdev-based core driver and one platform
>> > driver. See e.g. radio-si4713/si4713-i2c.c as a good
>> > example. But I would wait with that until the rest of the
>> > driver is cleaned up. Then I have a better idea of whether
>> > this is necessary or not.
>> >
>> > It's also very useful to run v4l2-compliance (available in
>> > the v4l-utils.git repo on git.linuxtv.org). That does lots
>> > of sanity checks.
>> >
>> > Another option is to add the driver as-is to
>> > drivers/staging/media, and clean it up bit by bit.
>> >
>> > Regards,
>> >
>> > 	Hans
>> >
>> > On 10/15/2013 04:26 PM, Pali Rohár wrote:
>> > > This adds support for the BCM2048 radio module found in
>> > > Nokia N900
>> > >
>> > > Signed-off-by: Eero Nurkkala <ext-eero.nurkkala@nokia.com>
>> > > Signed-off-by: Nils Faerber
>> > > <nils.faerber@kernelconcepts.de> Signed-off-by: Joni
>> > > Lapilainen <joni.lapilainen@gmail.com> Signed-off-by:
>> > > Pali Rohár <pali.rohar@gmail.com>
>> > > ---
>> > >
>> > >  drivers/media/radio/Kconfig         |   10 +
>> > >  drivers/media/radio/Makefile        |    1 +
>> > >  drivers/media/radio/radio-bcm2048.c | 2744
>> > >  +++++++++++++++++++++++++++++++++++
>> > >  include/media/radio-bcm2048.h       |   30 +
>> > >  4 files changed, 2785 insertions(+)
>> > >  create mode 100644 drivers/media/radio/radio-bcm2048.c
>> > >  create mode 100644 include/media/radio-bcm2048.h
>
> --
> Pali Rohár
> pali.rohar@gmail.com
>


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Pali Rohár Oct. 26, 2013, 8:45 p.m. UTC | #5 
On Saturday 26 October 2013 22:22:09 Hans Verkuil wrote:
> > Hans, so can it be added to drivers/staging/media tree?
> 
> Yes, that is an option. It's up to you to decide what you
> want. Note that if no cleanup work is done on the staging
> driver for a long time, then it can be removed again.
> 
> Regards,
> 
>     Hans
> 

Ok, so if you can add it to staging tree. When driver will be in 
mainline other developers can look at it too. Now when driver is 
hidden, nobody know where to find it... You can see how upstream 
development for Nokia N900 HW going on: http://elinux.org/N900
Hans Verkuil Nov. 4, 2013, 11:39 a.m. UTC | #6 
Hi Pali,

On 10/26/2013 10:45 PM, Pali Rohár wrote:
> On Saturday 26 October 2013 22:22:09 Hans Verkuil wrote:
>>> Hans, so can it be added to drivers/staging/media tree?
>>
>> Yes, that is an option. It's up to you to decide what you
>> want. Note that if no cleanup work is done on the staging
>> driver for a long time, then it can be removed again.
>>
>> Regards,
>>
>>     Hans
>>
> 
> Ok, so if you can add it to staging tree. When driver will be in 
> mainline other developers can look at it too. Now when driver is 
> hidden, nobody know where to find it... You can see how upstream 
> development for Nokia N900 HW going on: http://elinux.org/N900
> 

Please check my tree:

http://git.linuxtv.org/hverkuil/media_tree.git/shortlog/refs/heads/bcm

If you're OK, then I'll queue it for 3.14 (it's too late for 3.13).

Regards,

	Hans
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Pali Rohár Dec. 2, 2013, 8:51 p.m. UTC | #7 
On Monday 04 November 2013 12:39:44 Hans Verkuil wrote:
> Hi Pali,
> 
> On 10/26/2013 10:45 PM, Pali Rohár wrote:
> > On Saturday 26 October 2013 22:22:09 Hans Verkuil wrote:
> >>> Hans, so can it be added to drivers/staging/media tree?
> >> 
> >> Yes, that is an option. It's up to you to decide what you
> >> want. Note that if no cleanup work is done on the staging
> >> driver for a long time, then it can be removed again.
> >> 
> >> Regards,
> >> 
> >>     Hans
> > 
> > Ok, so if you can add it to staging tree. When driver will
> > be in mainline other developers can look at it too. Now
> > when driver is hidden, nobody know where to find it... You
> > can see how upstream development for Nokia N900 HW going
> > on: http://elinux.org/N900
> 
> Please check my tree:
> 
> http://git.linuxtv.org/hverkuil/media_tree.git/shortlog/refs/h
> eads/bcm
> 
> If you're OK, then I'll queue it for 3.14 (it's too late for
> 3.13).
> 
> Regards,
> 
> 	Hans

Hi, sorry for late reply. I looked into your tree and difference 
is that you only removed "linux/slab.h" include. So it it is not 
needed, then it is OK.
Hans Verkuil Dec. 5, 2013, 7:52 a.m. UTC | #8 
On 12/02/2013 09:51 PM, Pali Rohár wrote:
> On Monday 04 November 2013 12:39:44 Hans Verkuil wrote:
>> Hi Pali,
>>
>> On 10/26/2013 10:45 PM, Pali Rohár wrote:
>>> On Saturday 26 October 2013 22:22:09 Hans Verkuil wrote:
>>>>> Hans, so can it be added to drivers/staging/media tree?
>>>>
>>>> Yes, that is an option. It's up to you to decide what you
>>>> want. Note that if no cleanup work is done on the staging
>>>> driver for a long time, then it can be removed again.
>>>>
>>>> Regards,
>>>>
>>>>     Hans
>>>
>>> Ok, so if you can add it to staging tree. When driver will
>>> be in mainline other developers can look at it too. Now
>>> when driver is hidden, nobody know where to find it... You
>>> can see how upstream development for Nokia N900 HW going
>>> on: http://elinux.org/N900
>>
>> Please check my tree:
>>
>> http://git.linuxtv.org/hverkuil/media_tree.git/shortlog/refs/h
>> eads/bcm
>>
>> If you're OK, then I'll queue it for 3.14 (it's too late for
>> 3.13).
>>
>> Regards,
>>
>> 	Hans
> 
> Hi, sorry for late reply. I looked into your tree and difference 
> is that you only removed "linux/slab.h" include. So it it is not 
> needed, then it is OK.

I *added* slab.h :-)

Anyway, I've posted the pull request. Please note, if you want to avoid
having this driver be removed again in the future, then you (or someone else)
should work on addressing the issues in the TODO file I added.

Regards,

	Hans
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Pali Rohár Dec. 5, 2013, 1:20 p.m. UTC | #9 
On Thursday 05 December 2013 08:52:30 Hans Verkuil wrote:
> On 12/02/2013 09:51 PM, Pali Rohár wrote:
> > On Monday 04 November 2013 12:39:44 Hans Verkuil wrote:
> >> Hi Pali,
> >> 
> >> On 10/26/2013 10:45 PM, Pali Rohár wrote:
> >>> On Saturday 26 October 2013 22:22:09 Hans Verkuil wrote:
> >>>>> Hans, so can it be added to drivers/staging/media tree?
> >>>> 
> >>>> Yes, that is an option. It's up to you to decide what you
> >>>> want. Note that if no cleanup work is done on the staging
> >>>> driver for a long time, then it can be removed again.
> >>>> 
> >>>> Regards,
> >>>> 
> >>>>     Hans
> >>> 
> >>> Ok, so if you can add it to staging tree. When driver will
> >>> be in mainline other developers can look at it too. Now
> >>> when driver is hidden, nobody know where to find it... You
> >>> can see how upstream development for Nokia N900 HW going
> >>> on: http://elinux.org/N900
> >> 
> >> Please check my tree:
> >> 
> >> http://git.linuxtv.org/hverkuil/media_tree.git/shortlog/ref
> >> s/h eads/bcm
> >> 
> >> If you're OK, then I'll queue it for 3.14 (it's too late
> >> for 3.13).
> >> 
> >> Regards,
> >> 
> >> 	Hans
> > 
> > Hi, sorry for late reply. I looked into your tree and
> > difference is that you only removed "linux/slab.h" include.
> > So it it is not needed, then it is OK.
> 
> I *added* slab.h :-)
> 

Right, I looked at reverse diff :-)

> Anyway, I've posted the pull request. Please note, if you want
> to avoid having this driver be removed again in the future,
> then you (or someone else) should work on addressing the
> issues in the TODO file I added.
> 
> Regards,
> 
> 	Hans

Ok. CCing other people who works with n900 kernel.
Sebastian Reichel Dec. 5, 2013, 1:57 p.m. UTC | #10 
On Thu, Dec 05, 2013 at 02:20:56PM +0100, Pali Rohár wrote:
> > Anyway, I've posted the pull request. Please note, if you want
> > to avoid having this driver be removed again in the future,
> > then you (or someone else) should work on addressing the
> > issues in the TODO file I added.
> 
> Ok. CCing other people who works with n900 kernel.

Does the bcm2048's radio part work without the bluetooth driver?

-- Sebastian
Nils Faerber Dec. 5, 2013, 2:03 p.m. UTC | #11 
Am 05.12.2013 14:57, schrieb Sebastian Reichel:
> On Thu, Dec 05, 2013 at 02:20:56PM +0100, Pali Rohár wrote:
>>> Anyway, I've posted the pull request. Please note, if you want
>>> to avoid having this driver be removed again in the future,
>>> then you (or someone else) should work on addressing the
>>> issues in the TODO file I added.
>>
>> Ok. CCing other people who works with n900 kernel.
> 
> Does the bcm2048's radio part work without the bluetooth driver?

At least I do not know.
I just added the RDS data interface, I have no idea of about the
hardware and the other parts of it, sorry.

> -- Sebastian
Cheers
  nils
ext-eero.1.nurkkala@here.com Dec. 5, 2013, 8:03 p.m. UTC | #12 
> From: ext Nils Faerber [nils.faerber@kernelconcepts.de]
> Sent: Thursday, December 05, 2013 4:03 PM
> To: Pali Rohár; Hans Verkuil; Mauro Carvalho Chehab; linux-kernel@vger.kernel.org; linux-media@vger.kernel.org; Nurkkala Eero.1 (EXT-Haltian/Oulu); Joni Lapilainen; ?????? ????????; Pavel Machek; aaro.koskinen@iki.fi
> Subject: Re: [PATCH] media: Add BCM2048 radio driver
>
> Am 05.12.2013 14:57, schrieb Sebastian Reichel:
>> On Thu, Dec 05, 2013 at 02:20:56PM +0100, Pali Rohár wrote:
>>>> Anyway, I've posted the pull request. Please note, if you want
>>>> to avoid having this driver be removed again in the future,
>>>> then you (or someone else) should work on addressing the
>>>> issues in the TODO file I added.
>>>
>>> Ok. CCing other people who works with n900 kernel.
>>
>> Does the bcm2048's radio part work without the bluetooth driver?
>

Hello all,
I recall that is doesn't work separately, but instead, it had to be powered
on via a separate hci command. I don't remember what it was though.
But again it maybe had to do with the configuration of the BT. Anyway,
by having no BT driver at all would make it impossible to use the radio alone.

- Eero

> At least I do not know.
> I just added the RDS data interface, I have no idea of about the
> hardware and the other parts of it, sorry.
>
>> -- Sebastian
> Cheers
>  nils
>
> --
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> Sieghuetter Hauptweg 48
> D-57072 Siegen             Mob: +49-176-21024535
> http://www.kernelconcepts.de
diff mbox

Patch

diff --git a/drivers/media/radio/Kconfig b/drivers/media/radio/Kconfig
index 6ecdc39..fdd14ef 100644
--- a/drivers/media/radio/Kconfig
+++ b/drivers/media/radio/Kconfig
@@ -50,6 +50,16 @@  config USB_MR800
 	  To compile this driver as a module, choose M here: the
 	  module will be called radio-mr800.
 
+config I2C_BCM2048
+	tristate "Broadcom BCM2048 FM Radio Receiver support"
+	depends on I2C && VIDEO_V4L2
+	---help---
+	  Say Y here if you want support to BCM2048 FM Radio Receiver.
+	  This device driver supports only i2c bus.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called radio-bcm2048.
+
 config USB_DSBR
 	tristate "D-Link/GemTek USB FM radio support"
 	depends on USB && VIDEO_V4L2
diff --git a/drivers/media/radio/Makefile b/drivers/media/radio/Makefile
index 3b64560..9849f83 100644
--- a/drivers/media/radio/Makefile
+++ b/drivers/media/radio/Makefile
@@ -24,6 +24,7 @@  obj-$(CONFIG_RADIO_MIROPCM20) += radio-miropcm20.o
 obj-$(CONFIG_USB_DSBR) += dsbr100.o
 obj-$(CONFIG_RADIO_SI470X) += si470x/
 obj-$(CONFIG_USB_MR800) += radio-mr800.o
+obj-$(CONFIG_I2C_BCM2048) += radio-bcm2048.o
 obj-$(CONFIG_USB_KEENE) += radio-keene.o
 obj-$(CONFIG_USB_MA901) += radio-ma901.o
 obj-$(CONFIG_RADIO_TEA5764) += radio-tea5764.o
diff --git a/drivers/media/radio/radio-bcm2048.c b/drivers/media/radio/radio-bcm2048.c
new file mode 100644
index 0000000..d948cac
--- /dev/null
+++ b/drivers/media/radio/radio-bcm2048.c
@@ -0,0 +1,2744 @@ 
+/*
+ * drivers/media/radio/radio-bcm2048.c
+ *
+ * Driver for I2C Broadcom BCM2048 FM Radio Receiver:
+ *
+ * Copyright (C) Nokia Corporation
+ * Contact: Eero Nurkkala <ext-eero.nurkkala@nokia.com>
+ *
+ * Copyright (C) Nils Faerber <nils.faerber@kernelconcepts.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+/*
+ * History:
+ *		Eero Nurkkala <ext-eero.nurkkala@nokia.com>
+ *		Version 0.0.1
+ *		- Initial implementation
+ * 2010-02-21	Nils Faerber <nils.faerber@kernelconcepts.de>
+ *		Version 0.0.2
+ *		- Add support for interrupt driven rds data reading
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/version.h>
+#include <linux/interrupt.h>
+#include <linux/sysfs.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <linux/mutex.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include <media/radio-bcm2048.h>
+
+/* driver definitions */
+#define BCM2048_DRIVER_AUTHOR	"Eero Nurkkala <ext-eero.nurkkala@nokia.com>"
+#define BCM2048_DRIVER_NAME	BCM2048_NAME
+#define BCM2048_DRIVER_VERSION	KERNEL_VERSION(0, 0, 1)
+#define BCM2048_DRIVER_CARD	"Broadcom bcm2048 FM Radio Receiver"
+#define BCM2048_DRIVER_DESC	"I2C driver for BCM2048 FM Radio Receiver"
+
+/* I2C Control Registers */
+#define BCM2048_I2C_FM_RDS_SYSTEM	0x00
+#define BCM2048_I2C_FM_CTRL		0x01
+#define BCM2048_I2C_RDS_CTRL0		0x02
+#define BCM2048_I2C_RDS_CTRL1		0x03
+#define BCM2048_I2C_FM_AUDIO_PAUSE	0x04
+#define BCM2048_I2C_FM_AUDIO_CTRL0	0x05
+#define BCM2048_I2C_FM_AUDIO_CTRL1	0x06
+#define BCM2048_I2C_FM_SEARCH_CTRL0	0x07
+#define BCM2048_I2C_FM_SEARCH_CTRL1	0x08
+#define BCM2048_I2C_FM_SEARCH_TUNE_MODE	0x09
+#define BCM2048_I2C_FM_FREQ0		0x0a
+#define BCM2048_I2C_FM_FREQ1		0x0b
+#define BCM2048_I2C_FM_AF_FREQ0		0x0c
+#define BCM2048_I2C_FM_AF_FREQ1		0x0d
+#define BCM2048_I2C_FM_CARRIER		0x0e
+#define BCM2048_I2C_FM_RSSI		0x0f
+#define BCM2048_I2C_FM_RDS_MASK0	0x10
+#define BCM2048_I2C_FM_RDS_MASK1	0x11
+#define BCM2048_I2C_FM_RDS_FLAG0	0x12
+#define BCM2048_I2C_FM_RDS_FLAG1	0x13
+#define BCM2048_I2C_RDS_WLINE		0x14
+#define BCM2048_I2C_RDS_BLKB_MATCH0	0x16
+#define BCM2048_I2C_RDS_BLKB_MATCH1	0x17
+#define BCM2048_I2C_RDS_BLKB_MASK0	0x18
+#define BCM2048_I2C_RDS_BLKB_MASK1	0x19
+#define BCM2048_I2C_RDS_PI_MATCH0	0x1a
+#define BCM2048_I2C_RDS_PI_MATCH1	0x1b
+#define BCM2048_I2C_RDS_PI_MASK0	0x1c
+#define BCM2048_I2C_RDS_PI_MASK1	0x1d
+#define BCM2048_I2C_SPARE1		0x20
+#define BCM2048_I2C_SPARE2		0x21
+#define BCM2048_I2C_FM_RDS_REV		0x28
+#define BCM2048_I2C_SLAVE_CONFIGURATION	0x29
+#define BCM2048_I2C_RDS_DATA		0x80
+#define BCM2048_I2C_FM_BEST_TUNE_MODE	0x90
+
+/* BCM2048_I2C_FM_RDS_SYSTEM */
+#define BCM2048_FM_ON			0x01
+#define BCM2048_RDS_ON			0x02
+
+/* BCM2048_I2C_FM_CTRL */
+#define BCM2048_BAND_SELECT			0x01
+#define BCM2048_STEREO_MONO_AUTO_SELECT		0x02
+#define BCM2048_STEREO_MONO_MANUAL_SELECT	0x04
+#define BCM2048_STEREO_MONO_BLEND_SWITCH	0x08
+#define BCM2048_HI_LO_INJECTION			0x10
+
+/* BCM2048_I2C_RDS_CTRL0 */
+#define BCM2048_RBDS_RDS_SELECT		0x01
+#define BCM2048_FLUSH_FIFO		0x02
+
+/* BCM2048_I2C_FM_AUDIO_PAUSE */
+#define BCM2048_AUDIO_PAUSE_RSSI_TRESH	0x0f
+#define BCM2048_AUDIO_PAUSE_DURATION	0xf0
+
+/* BCM2048_I2C_FM_AUDIO_CTRL0 */
+#define BCM2048_RF_MUTE			0x01
+#define BCM2048_MANUAL_MUTE		0x02
+#define BCM2048_DAC_OUTPUT_LEFT		0x04
+#define BCM2048_DAC_OUTPUT_RIGHT	0x08
+#define BCM2048_AUDIO_ROUTE_DAC		0x10
+#define BCM2048_AUDIO_ROUTE_I2S		0x20
+#define BCM2048_DE_EMPHASIS_SELECT	0x40
+#define BCM2048_AUDIO_BANDWIDTH_SELECT	0x80
+
+/* BCM2048_I2C_FM_SEARCH_CTRL0 */
+#define BCM2048_SEARCH_RSSI_THRESHOLD	0x7f
+#define BCM2048_SEARCH_DIRECTION	0x80
+
+/* BCM2048_I2C_FM_SEARCH_TUNE_MODE */
+#define BCM2048_FM_AUTO_SEARCH		0x03
+
+/* BCM2048_I2C_FM_RSSI */
+#define BCM2048_RSSI_VALUE		0xff
+
+/* BCM2048_I2C_FM_RDS_MASK0 */
+/* BCM2048_I2C_FM_RDS_MASK1 */
+#define BCM2048_FM_FLAG_SEARCH_TUNE_FINISHED	0x01
+#define BCM2048_FM_FLAG_SEARCH_TUNE_FAIL	0x02
+#define BCM2048_FM_FLAG_RSSI_LOW		0x04
+#define BCM2048_FM_FLAG_CARRIER_ERROR_HIGH	0x08
+#define BCM2048_FM_FLAG_AUDIO_PAUSE_INDICATION	0x10
+#define BCM2048_FLAG_STEREO_DETECTED		0x20
+#define BCM2048_FLAG_STEREO_ACTIVE		0x40
+
+/* BCM2048_I2C_RDS_DATA */
+#define BCM2048_SLAVE_ADDRESS			0x3f
+#define BCM2048_SLAVE_ENABLE			0x80
+
+/* BCM2048_I2C_FM_BEST_TUNE_MODE */
+#define BCM2048_BEST_TUNE_MODE			0x80
+
+#define BCM2048_FM_FLAG_SEARCH_TUNE_FINISHED	0x01
+#define BCM2048_FM_FLAG_SEARCH_TUNE_FAIL	0x02
+#define BCM2048_FM_FLAG_RSSI_LOW		0x04
+#define BCM2048_FM_FLAG_CARRIER_ERROR_HIGH	0x08
+#define BCM2048_FM_FLAG_AUDIO_PAUSE_INDICATION	0x10
+#define BCM2048_FLAG_STEREO_DETECTED		0x20
+#define BCM2048_FLAG_STEREO_ACTIVE		0x40
+
+#define BCM2048_RDS_FLAG_FIFO_WLINE		0x02
+#define BCM2048_RDS_FLAG_B_BLOCK_MATCH		0x08
+#define BCM2048_RDS_FLAG_SYNC_LOST		0x10
+#define BCM2048_RDS_FLAG_PI_MATCH		0x20
+
+#define BCM2048_RDS_MARK_END_BYTE0		0x7C
+#define BCM2048_RDS_MARK_END_BYTEN		0xFF
+
+#define BCM2048_FM_FLAGS_ALL	(FM_FLAG_SEARCH_TUNE_FINISHED | \
+				 FM_FLAG_SEARCH_TUNE_FAIL | \
+				 FM_FLAG_RSSI_LOW | \
+				 FM_FLAG_CARRIER_ERROR_HIGH | \
+				 FM_FLAG_AUDIO_PAUSE_INDICATION | \
+				 FLAG_STEREO_DETECTED | FLAG_STEREO_ACTIVE)
+
+#define BCM2048_RDS_FLAGS_ALL	(RDS_FLAG_FIFO_WLINE | \
+				 RDS_FLAG_B_BLOCK_MATCH | \
+				 RDS_FLAG_SYNC_LOST | RDS_FLAG_PI_MATCH)
+
+#define BCM2048_DEFAULT_TIMEOUT		1500
+#define BCM2048_AUTO_SEARCH_TIMEOUT	3000
+
+
+#define BCM2048_FREQDEV_UNIT		10000
+#define BCM2048_FREQV4L2_MULTI		625
+#define dev_to_v4l2(f)	((f * BCM2048_FREQDEV_UNIT) / BCM2048_FREQV4L2_MULTI)
+#define v4l2_to_dev(f)	((f * BCM2048_FREQV4L2_MULTI) / BCM2048_FREQDEV_UNIT)
+
+#define msb(x)                  ((u8)((u16) x >> 8))
+#define lsb(x)                  ((u8)((u16) x &  0x00FF))
+#define compose_u16(msb, lsb)	(((u16)msb << 8) | lsb)
+
+#define BCM2048_DEFAULT_POWERING_DELAY	20
+#define BCM2048_DEFAULT_REGION		0x02
+#define BCM2048_DEFAULT_MUTE		0x01
+#define BCM2048_DEFAULT_RSSI_THRESHOLD	0x64
+#define BCM2048_DEFAULT_RDS_WLINE	0x7E
+
+#define BCM2048_FM_SEARCH_INACTIVE	0x00
+#define BCM2048_FM_PRE_SET_MODE		0x01
+#define BCM2048_FM_AUTO_SEARCH_MODE	0x02
+#define BCM2048_FM_AF_JUMP_MODE		0x03
+
+#define BCM2048_FREQUENCY_BASE		64000
+
+#define BCM2048_POWER_ON		0x01
+#define BCM2048_POWER_OFF		0x00
+
+#define BCM2048_ITEM_ENABLED		0x01
+#define BCM2048_SEARCH_DIRECTION_UP	0x01
+
+#define BCM2048_DE_EMPHASIS_75us	75
+#define BCM2048_DE_EMPHASIS_50us	50
+
+#define BCM2048_SCAN_FAIL		0x00
+#define BCM2048_SCAN_OK			0x01
+
+#define BCM2048_FREQ_ERROR_FLOOR	-20
+#define BCM2048_FREQ_ERROR_ROOF		20
+
+/* -60 dB is reported as full signal strenght */
+#define BCM2048_RSSI_LEVEL_BASE		-60
+#define BCM2048_RSSI_LEVEL_ROOF		-100
+#define BCM2048_RSSI_LEVEL_ROOF_NEG	100
+#define BCM2048_SIGNAL_MULTIPLIER	(0xFFFF / \
+					 (BCM2048_RSSI_LEVEL_ROOF_NEG + \
+					  BCM2048_RSSI_LEVEL_BASE))
+
+#define BCM2048_RDS_FIFO_DUPLE_SIZE	0x03
+#define BCM2048_RDS_CRC_MASK		0x0F
+#define BCM2048_RDS_CRC_NONE		0x00
+#define BCM2048_RDS_CRC_MAX_2BITS	0x04
+#define BCM2048_RDS_CRC_LEAST_2BITS	0x08
+#define BCM2048_RDS_CRC_UNRECOVARABLE	0x0C
+
+#define BCM2048_RDS_BLOCK_MASK		0xF0
+#define BCM2048_RDS_BLOCK_A		0x00
+#define BCM2048_RDS_BLOCK_B		0x10
+#define BCM2048_RDS_BLOCK_C		0x20
+#define BCM2048_RDS_BLOCK_D		0x30
+#define BCM2048_RDS_BLOCK_C_SCORED	0x40
+#define BCM2048_RDS_BLOCK_E		0x60
+
+#define BCM2048_RDS_RT			0x20
+#define BCM2048_RDS_PS			0x00
+
+#define BCM2048_RDS_GROUP_AB_MASK	0x08
+#define BCM2048_RDS_GROUP_A		0x00
+#define BCM2048_RDS_GROUP_B		0x08
+
+#define BCM2048_RDS_RT_AB_MASK		0x10
+#define BCM2048_RDS_RT_A		0x00
+#define BCM2048_RDS_RT_B		0x10
+#define BCM2048_RDS_RT_INDEX		0x0F
+
+#define BCM2048_RDS_PS_INDEX		0x03
+
+struct rds_info {
+	u16 rds_pi;
+#define BCM2048_MAX_RDS_RT (64 + 1)
+	u8 rds_rt[BCM2048_MAX_RDS_RT];
+	u8 rds_rt_group_b;
+	u8 rds_rt_ab;
+#define BCM2048_MAX_RDS_PS (8 + 1)
+	u8 rds_ps[BCM2048_MAX_RDS_PS];
+	u8 rds_ps_group;
+	u8 rds_ps_group_cnt;
+#define BCM2048_MAX_RDS_RADIO_TEXT 255
+	u8 radio_text[BCM2048_MAX_RDS_RADIO_TEXT + 3];
+	u8 text_len;
+};
+
+struct region_info {
+	u32 bottom_frequency;
+	u32 top_frequency;
+	u8 deemphasis;
+	u8 channel_spacing;
+	u8 region;
+};
+
+struct bcm2048_device {
+	struct i2c_client *client;
+	struct video_device *videodev;
+	struct work_struct work;
+	struct completion compl;
+	struct mutex mutex;
+	struct bcm2048_platform_data *platform_data;
+	struct rds_info rds_info;
+	struct region_info region_info;
+	u16 frequency;
+	u8 cache_fm_rds_system;
+	u8 cache_fm_ctrl;
+	u8 cache_fm_audio_ctrl0;
+	u8 cache_fm_search_ctrl0;
+	u8 power_state;
+	u8 rds_state;
+	u8 fifo_size;
+	u8 scan_state;
+	u8 mute_state;
+
+	/* for rds data device read */
+	wait_queue_head_t read_queue;
+	unsigned int users;
+	unsigned char rds_data_available;
+	unsigned int rd_index;
+};
+
+static int radio_nr = -1;	/* radio device minor (-1 ==> auto assign) */
+module_param(radio_nr, int, 0);
+MODULE_PARM_DESC(radio_nr,
+		 "Minor number for radio device (-1 ==> auto assign)");
+
+static struct region_info region_configs[] = {
+	/* USA */
+	{
+		.channel_spacing	= 20,
+		.bottom_frequency	= 87500,
+		.top_frequency		= 108000,
+		.deemphasis		= 75,
+		.region			= 0,
+	},
+	/* Australia */
+	{
+		.channel_spacing	= 20,
+		.bottom_frequency	= 87500,
+		.top_frequency		= 108000,
+		.deemphasis		= 50,
+		.region			= 1,
+	},
+	/* Europe */
+	{
+		.channel_spacing	= 10,
+		.bottom_frequency	= 87500,
+		.top_frequency		= 108000,
+		.deemphasis		= 50,
+		.region			= 2,
+	},
+	/* Japan */
+	{
+		.channel_spacing	= 10,
+		.bottom_frequency	= 76000,
+		.top_frequency		= 90000,
+		.deemphasis		= 50,
+		.region			= 3,
+	},
+	/* Japan wide band */
+	{
+		.channel_spacing	= 10,
+		.bottom_frequency	= 76000,
+		.top_frequency		= 108000,
+		.deemphasis		= 50,
+		.region			= 4,
+	},
+};
+
+/*
+ *	I2C Interface read / write
+ */
+static int bcm2048_send_command(struct bcm2048_device *bdev, unsigned int reg,
+					unsigned int value)
+{
+	struct i2c_client *client = bdev->client;
+	u8 data[2];
+
+	if (!bdev->power_state) {
+		dev_err(&bdev->client->dev, "bcm2048: chip not powered!\n");
+		return -EIO;
+	}
+
+	data[0] = reg & 0xff;
+	data[1] = value & 0xff;
+
+	if (i2c_master_send(client, data, 2) == 2) {
+		return 0;
+	} else {
+		dev_err(&bdev->client->dev, "BCM I2C error!\n");
+		dev_err(&bdev->client->dev, "Is Bluetooth up and running?\n");
+		return -EIO;
+	}
+}
+
+static int bcm2048_recv_command(struct bcm2048_device *bdev, unsigned int reg,
+			u8 *value)
+{
+	struct i2c_client *client = bdev->client;
+
+	if (!bdev->power_state) {
+		dev_err(&bdev->client->dev, "bcm2048: chip not powered!\n");
+		return -EIO;
+	}
+
+	value[0] = i2c_smbus_read_byte_data(client, reg & 0xff);
+
+	return 0;
+}
+
+static int bcm2048_recv_duples(struct bcm2048_device *bdev, unsigned int reg,
+			u8 *value, u8 duples)
+{
+	struct i2c_client *client = bdev->client;
+	struct i2c_adapter *adap = client->adapter;
+	struct i2c_msg msg[2];
+	u8 buf;
+
+	if (!bdev->power_state) {
+		dev_err(&bdev->client->dev, "bcm2048: chip not powered!\n");
+		return -EIO;
+	}
+
+	buf = reg & 0xff;
+
+	msg[0].addr = client->addr;
+	msg[0].flags = client->flags & I2C_M_TEN;
+	msg[0].len = 1;
+	msg[0].buf = &buf;
+
+	msg[1].addr = client->addr;
+	msg[1].flags = client->flags & I2C_M_TEN;
+	msg[1].flags |= I2C_M_RD;
+	msg[1].len = duples;
+	msg[1].buf = value;
+
+	return i2c_transfer(adap, msg, 2);
+}
+
+/*
+ *	BCM2048 - I2C register programming helpers
+ */
+static int bcm2048_set_power_state(struct bcm2048_device *bdev, u8 power)
+{
+	int err = 0;
+
+	mutex_lock(&bdev->mutex);
+
+	if (power) {
+		bdev->power_state = BCM2048_POWER_ON;
+		bdev->cache_fm_rds_system |= BCM2048_FM_ON;
+	} else {
+		bdev->cache_fm_rds_system &= ~BCM2048_FM_ON;
+	}
+
+	/*
+	 * Warning! FM cannot be turned off because then
+	 * the I2C communications get ruined!
+	 * Comment off the "if (power)" when the chip works!
+	 */
+	if (power)
+		err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_SYSTEM,
+					bdev->cache_fm_rds_system);
+	msleep(BCM2048_DEFAULT_POWERING_DELAY);
+
+	if (!power)
+		bdev->power_state = BCM2048_POWER_OFF;
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_power_state(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 value;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_SYSTEM, &value);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (!err && (value & BCM2048_FM_ON))
+		return BCM2048_POWER_ON;
+
+	return err;
+}
+
+static int bcm2048_set_rds_no_lock(struct bcm2048_device *bdev, u8 rds_on)
+{
+	int err;
+	u8 flags;
+
+	bdev->cache_fm_rds_system &= ~BCM2048_RDS_ON;
+
+	if (rds_on) {
+		bdev->cache_fm_rds_system |= BCM2048_RDS_ON;
+		bdev->rds_state = BCM2048_RDS_ON;
+		flags =	BCM2048_RDS_FLAG_FIFO_WLINE;
+		err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_MASK1,
+						flags);
+	} else {
+		flags =	0;
+		bdev->rds_state = 0;
+		err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_MASK1,
+						flags);
+		memset(&bdev->rds_info, 0, sizeof(bdev->rds_info));
+	}
+
+	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_SYSTEM,
+					bdev->cache_fm_rds_system);
+
+	return err;
+}
+
+static int bcm2048_get_rds_no_lock(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 value;
+
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_SYSTEM, &value);
+
+	if (!err && (value & BCM2048_RDS_ON))
+		return BCM2048_ITEM_ENABLED;
+
+	return err;
+}
+
+static int bcm2048_set_rds(struct bcm2048_device *bdev, u8 rds_on)
+{
+	int err;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_set_rds_no_lock(bdev, rds_on);
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_rds(struct bcm2048_device *bdev)
+{
+	int err;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_get_rds_no_lock(bdev);
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_rds_pi(struct bcm2048_device *bdev)
+{
+	return bdev->rds_info.rds_pi;
+}
+
+static int bcm2048_set_fm_automatic_stereo_mono(struct bcm2048_device *bdev,
+						u8 enabled)
+{
+	int err;
+
+	mutex_lock(&bdev->mutex);
+
+	bdev->cache_fm_ctrl &= ~BCM2048_STEREO_MONO_AUTO_SELECT;
+
+	if (enabled)
+		bdev->cache_fm_ctrl |= BCM2048_STEREO_MONO_AUTO_SELECT;
+
+	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_CTRL,
+					bdev->cache_fm_ctrl);
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_set_fm_hi_lo_injection(struct bcm2048_device *bdev,
+						u8 hi_lo)
+{
+	int err;
+
+	mutex_lock(&bdev->mutex);
+
+	bdev->cache_fm_ctrl &= ~BCM2048_HI_LO_INJECTION;
+
+	if (hi_lo)
+		bdev->cache_fm_ctrl |= BCM2048_HI_LO_INJECTION;
+
+	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_CTRL,
+					bdev->cache_fm_ctrl);
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_fm_hi_lo_injection(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 value;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_CTRL, &value);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (!err && (value & BCM2048_HI_LO_INJECTION))
+		return BCM2048_ITEM_ENABLED;
+
+	return err;
+}
+
+static int bcm2048_set_fm_frequency(struct bcm2048_device *bdev, u32 frequency)
+{
+	int err;
+
+	if (frequency < bdev->region_info.bottom_frequency ||
+		frequency > bdev->region_info.top_frequency)
+		return -EDOM;
+
+	frequency -= BCM2048_FREQUENCY_BASE;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_FREQ0, lsb(frequency));
+	err |= bcm2048_send_command(bdev, BCM2048_I2C_FM_FREQ1,
+					msb(frequency));
+
+	if (!err)
+		bdev->frequency = frequency;
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_fm_frequency(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 lsb, msb;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_FREQ0, &lsb);
+	err |= bcm2048_recv_command(bdev, BCM2048_I2C_FM_FREQ1, &msb);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (err)
+		return err;
+
+	err = compose_u16(msb, lsb);
+	err += BCM2048_FREQUENCY_BASE;
+
+	return err;
+}
+
+static int bcm2048_set_fm_af_frequency(struct bcm2048_device *bdev,
+						u32 frequency)
+{
+	int err;
+
+	if (frequency < bdev->region_info.bottom_frequency ||
+		frequency > bdev->region_info.top_frequency)
+		return -EDOM;
+
+	frequency -= BCM2048_FREQUENCY_BASE;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AF_FREQ0,
+					lsb(frequency));
+	err |= bcm2048_send_command(bdev, BCM2048_I2C_FM_AF_FREQ1,
+					msb(frequency));
+	if (!err)
+		bdev->frequency = frequency;
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_fm_af_frequency(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 lsb, msb;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AF_FREQ0, &lsb);
+	err |= bcm2048_recv_command(bdev, BCM2048_I2C_FM_AF_FREQ1, &msb);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (err)
+		return err;
+
+	err = compose_u16(msb, lsb);
+	err += BCM2048_FREQUENCY_BASE;
+
+	return err;
+}
+
+static int bcm2048_set_fm_deemphasis(struct bcm2048_device *bdev, int d)
+{
+	int err;
+	u8 deemphasis;
+
+	if (d == BCM2048_DE_EMPHASIS_75us)
+		deemphasis = BCM2048_DE_EMPHASIS_SELECT;
+	else
+		deemphasis = 0;
+
+	mutex_lock(&bdev->mutex);
+
+	bdev->cache_fm_audio_ctrl0 &= ~BCM2048_DE_EMPHASIS_SELECT;
+	bdev->cache_fm_audio_ctrl0 |= deemphasis;
+
+	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
+		bdev->cache_fm_audio_ctrl0);
+
+	if (!err)
+		bdev->region_info.deemphasis = d;
+
+	mutex_unlock(&bdev->mutex);
+
+	return err;
+}
+
+static int bcm2048_get_fm_deemphasis(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 value;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0, &value);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (!err) {
+		if (value & BCM2048_DE_EMPHASIS_SELECT)
+			return BCM2048_DE_EMPHASIS_75us;
+		else
+			return BCM2048_DE_EMPHASIS_50us;
+	}
+
+	return err;
+}
+
+static int bcm2048_set_region(struct bcm2048_device *bdev, u8 region)
+{
+	int err;
+	u32 new_frequency = 0;
+
+	if (region > ARRAY_SIZE(region_configs))
+		return -EINVAL;
+
+	mutex_lock(&bdev->mutex);
+	memcpy(&bdev->region_info, &region_configs[region],
+		sizeof(struct region_info));
+	mutex_unlock(&bdev->mutex);
+
+	if (bdev->frequency < region_configs[region].bottom_frequency ||
+		bdev->frequency > region_configs[region].top_frequency)
+		new_frequency = region_configs[region].bottom_frequency;
+
+	if (new_frequency > 0) {
+		err = bcm2048_set_fm_frequency(bdev, new_frequency);
+
+		if (err)
+			goto done;
+	}
+
+	err = bcm2048_set_fm_deemphasis(bdev,
+			region_configs[region].deemphasis);
+
+done:
+	return err;
+}
+
+static int bcm2048_get_region(struct bcm2048_device *bdev)
+{
+	int err;
+
+	mutex_lock(&bdev->mutex);
+	err = bdev->region_info.region;
+	mutex_unlock(&bdev->mutex);
+
+	return err;
+}
+
+static int bcm2048_set_mute(struct bcm2048_device *bdev, u16 mute)
+{
+	int err;
+
+	mutex_lock(&bdev->mutex);
+
+	bdev->cache_fm_audio_ctrl0 &= ~(BCM2048_RF_MUTE | BCM2048_MANUAL_MUTE);
+
+	if (mute)
+		bdev->cache_fm_audio_ctrl0 |= (BCM2048_RF_MUTE |
+						BCM2048_MANUAL_MUTE);
+
+	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
+					bdev->cache_fm_audio_ctrl0);
+
+	if (!err)
+		bdev->mute_state = mute;
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_mute(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 value;
+
+	mutex_lock(&bdev->mutex);
+
+	if (bdev->power_state) {
+		err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
+						&value);
+		if (!err)
+			err = value & (BCM2048_RF_MUTE | BCM2048_MANUAL_MUTE);
+	} else {
+		err = bdev->mute_state;
+	}
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_set_audio_route(struct bcm2048_device *bdev, u8 route)
+{
+	int err;
+
+	mutex_lock(&bdev->mutex);
+
+	route &= (BCM2048_AUDIO_ROUTE_DAC | BCM2048_AUDIO_ROUTE_I2S);
+	bdev->cache_fm_audio_ctrl0 &= ~(BCM2048_AUDIO_ROUTE_DAC |
+		BCM2048_AUDIO_ROUTE_I2S);
+	bdev->cache_fm_audio_ctrl0 |= route;
+
+	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
+					bdev->cache_fm_audio_ctrl0);
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_audio_route(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 value;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0, &value);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (!err)
+		return value & (BCM2048_AUDIO_ROUTE_DAC |
+			BCM2048_AUDIO_ROUTE_I2S);
+
+	return err;
+}
+
+static int bcm2048_set_dac_output(struct bcm2048_device *bdev, u8 channels)
+{
+	int err;
+
+	mutex_lock(&bdev->mutex);
+
+	bdev->cache_fm_audio_ctrl0 &= ~(BCM2048_DAC_OUTPUT_LEFT |
+					BCM2048_DAC_OUTPUT_RIGHT);
+	bdev->cache_fm_audio_ctrl0 |= channels;
+
+	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
+					bdev->cache_fm_audio_ctrl0);
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_dac_output(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 value;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0, &value);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (!err)
+		return value & (BCM2048_DAC_OUTPUT_LEFT |
+			BCM2048_DAC_OUTPUT_RIGHT);
+
+	return err;
+}
+
+static int bcm2048_set_fm_search_rssi_threshold(struct bcm2048_device *bdev,
+							u8 threshold)
+{
+	int err;
+
+	mutex_lock(&bdev->mutex);
+
+	threshold &= BCM2048_SEARCH_RSSI_THRESHOLD;
+	bdev->cache_fm_search_ctrl0 &= ~BCM2048_SEARCH_RSSI_THRESHOLD;
+	bdev->cache_fm_search_ctrl0 |= threshold;
+
+	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_SEARCH_CTRL0,
+					bdev->cache_fm_search_ctrl0);
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_fm_search_rssi_threshold(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 value;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_SEARCH_CTRL0, &value);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (!err)
+		return value & BCM2048_SEARCH_RSSI_THRESHOLD;
+
+	return err;
+}
+
+static int bcm2048_set_fm_search_mode_direction(struct bcm2048_device *bdev,
+						u8 direction)
+{
+	int err;
+
+	mutex_lock(&bdev->mutex);
+
+	bdev->cache_fm_search_ctrl0 &= ~BCM2048_SEARCH_DIRECTION;
+
+	if (direction)
+		bdev->cache_fm_search_ctrl0 |= BCM2048_SEARCH_DIRECTION;
+
+	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_SEARCH_CTRL0,
+					bdev->cache_fm_search_ctrl0);
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_fm_search_mode_direction(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 value;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_SEARCH_CTRL0, &value);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (!err && (value & BCM2048_SEARCH_DIRECTION))
+		return BCM2048_SEARCH_DIRECTION_UP;
+
+	return err;
+}
+
+static int bcm2048_set_fm_search_tune_mode(struct bcm2048_device *bdev,
+						u8 mode)
+{
+	int err, timeout, restart_rds = 0;
+	u8 value, flags;
+
+	value = mode & BCM2048_FM_AUTO_SEARCH;
+
+	flags =	BCM2048_FM_FLAG_SEARCH_TUNE_FINISHED |
+		BCM2048_FM_FLAG_SEARCH_TUNE_FAIL;
+
+	mutex_lock(&bdev->mutex);
+
+	/*
+	 * If RDS is enabled, and frequency is changed, RDS quits working.
+	 * Thus, always restart RDS if it's enabled. Moreover, RDS must
+	 * not be enabled while changing the frequency because it can
+	 * provide a race to the mutex from the workqueue handler if RDS
+	 * IRQ occurs while waiting for frequency changed IRQ.
+	 */
+	if (bcm2048_get_rds_no_lock(bdev)) {
+		err = bcm2048_set_rds_no_lock(bdev, 0);
+		if (err)
+			goto unlock;
+		restart_rds = 1;
+	}
+
+	err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_MASK0, flags);
+
+	if (err)
+		goto unlock;
+
+	bcm2048_send_command(bdev, BCM2048_I2C_FM_SEARCH_TUNE_MODE, value);
+
+	if (mode != BCM2048_FM_AUTO_SEARCH_MODE)
+		timeout = BCM2048_DEFAULT_TIMEOUT;
+	else
+		timeout = BCM2048_AUTO_SEARCH_TIMEOUT;
+
+	if (!wait_for_completion_timeout(&bdev->compl,
+			msecs_to_jiffies(timeout)))
+			dev_err(&bdev->client->dev, "IRQ timeout.\n");
+
+	if (value)
+		if (!bdev->scan_state)
+			err = -EIO;
+
+unlock:
+	if (restart_rds)
+		err |= bcm2048_set_rds_no_lock(bdev, 1);
+
+	mutex_unlock(&bdev->mutex);
+
+	return err;
+}
+
+static int bcm2048_get_fm_search_tune_mode(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 value;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_SEARCH_TUNE_MODE,
+					&value);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (!err)
+		return value & BCM2048_FM_AUTO_SEARCH;
+
+	return err;
+}
+
+static int bcm2048_set_rds_b_block_mask(struct bcm2048_device *bdev, u16 mask)
+{
+	int err;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_send_command(bdev,
+			BCM2048_I2C_RDS_BLKB_MASK0, lsb(mask));
+	err |= bcm2048_send_command(bdev,
+			BCM2048_I2C_RDS_BLKB_MASK1, msb(mask));
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_rds_b_block_mask(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 lsb, msb;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev,
+			BCM2048_I2C_RDS_BLKB_MASK0, &lsb);
+	err |= bcm2048_recv_command(bdev,
+			BCM2048_I2C_RDS_BLKB_MASK1, &msb);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (!err)
+		return compose_u16(msb, lsb);
+
+	return err;
+}
+
+static int bcm2048_set_rds_b_block_match(struct bcm2048_device *bdev,
+						u16 match)
+{
+	int err;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_send_command(bdev,
+			BCM2048_I2C_RDS_BLKB_MATCH0, lsb(match));
+	err |= bcm2048_send_command(bdev,
+			BCM2048_I2C_RDS_BLKB_MATCH1, msb(match));
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_rds_b_block_match(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 lsb, msb;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev,
+			BCM2048_I2C_RDS_BLKB_MATCH0, &lsb);
+	err |= bcm2048_recv_command(bdev,
+			BCM2048_I2C_RDS_BLKB_MATCH1, &msb);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (!err)
+		return compose_u16(msb, lsb);
+
+	return err;
+}
+
+static int bcm2048_set_rds_pi_mask(struct bcm2048_device *bdev, u16 mask)
+{
+	int err;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_send_command(bdev,
+			BCM2048_I2C_RDS_PI_MASK0, lsb(mask));
+	err |= bcm2048_send_command(bdev,
+			BCM2048_I2C_RDS_PI_MASK1, msb(mask));
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_rds_pi_mask(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 lsb, msb;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev,
+			BCM2048_I2C_RDS_PI_MASK0, &lsb);
+	err |= bcm2048_recv_command(bdev,
+			BCM2048_I2C_RDS_PI_MASK1, &msb);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (!err)
+		return compose_u16(msb, lsb);
+
+	return err;
+}
+
+static int bcm2048_set_rds_pi_match(struct bcm2048_device *bdev, u16 match)
+{
+	int err;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_send_command(bdev,
+			BCM2048_I2C_RDS_PI_MATCH0, lsb(match));
+	err |= bcm2048_send_command(bdev,
+			BCM2048_I2C_RDS_PI_MATCH1, msb(match));
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_rds_pi_match(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 lsb, msb;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev,
+			BCM2048_I2C_RDS_PI_MATCH0, &lsb);
+	err |= bcm2048_recv_command(bdev,
+			BCM2048_I2C_RDS_PI_MATCH1, &msb);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (!err)
+		return compose_u16(msb, lsb);
+
+	return err;
+}
+
+static int bcm2048_set_fm_rds_mask(struct bcm2048_device *bdev, u16 mask)
+{
+	int err;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_send_command(bdev,
+			BCM2048_I2C_FM_RDS_MASK0, lsb(mask));
+	err |= bcm2048_send_command(bdev,
+			BCM2048_I2C_FM_RDS_MASK1, msb(mask));
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_fm_rds_mask(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 value0, value1;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_MASK0, &value0);
+	err |= bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_MASK1, &value1);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (!err)
+		return compose_u16(value1, value0);
+
+	return err;
+}
+
+static int bcm2048_get_fm_rds_flags(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 value0, value1;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_FLAG0, &value0);
+	err |= bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_FLAG1, &value1);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (!err)
+		return compose_u16(value1, value0);
+
+	return err;
+}
+
+static int bcm2048_get_region_bottom_frequency(struct bcm2048_device *bdev)
+{
+	return bdev->region_info.bottom_frequency;
+}
+
+static int bcm2048_get_region_top_frequency(struct bcm2048_device *bdev)
+{
+	return bdev->region_info.top_frequency;
+}
+
+static int bcm2048_set_fm_best_tune_mode(struct bcm2048_device *bdev, u8 mode)
+{
+	int err;
+	u8 value;
+
+	mutex_lock(&bdev->mutex);
+
+	/* Perform read as the manual indicates */
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_BEST_TUNE_MODE,
+					&value);
+	value &= ~BCM2048_BEST_TUNE_MODE;
+
+	if (mode)
+		value |= BCM2048_BEST_TUNE_MODE;
+	err |= bcm2048_send_command(bdev, BCM2048_I2C_FM_BEST_TUNE_MODE,
+					value);
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_fm_best_tune_mode(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 value;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_BEST_TUNE_MODE,
+					&value);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (!err && (value & BCM2048_BEST_TUNE_MODE))
+		return BCM2048_ITEM_ENABLED;
+
+	return err;
+}
+
+static int bcm2048_get_fm_carrier_error(struct bcm2048_device *bdev)
+{
+	int err = 0;
+	s8 value;
+
+	mutex_lock(&bdev->mutex);
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_CARRIER, &value);
+	mutex_unlock(&bdev->mutex);
+
+	if (!err)
+		return value;
+
+	return err;
+}
+
+static int bcm2048_get_fm_rssi(struct bcm2048_device *bdev)
+{
+	int err;
+	s8 value;
+
+	mutex_lock(&bdev->mutex);
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RSSI, &value);
+	mutex_unlock(&bdev->mutex);
+
+	if (!err)
+		return value;
+
+	return err;
+}
+
+static int bcm2048_set_rds_wline(struct bcm2048_device *bdev, u8 wline)
+{
+	int err;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_send_command(bdev, BCM2048_I2C_RDS_WLINE, wline);
+
+	if (!err)
+		bdev->fifo_size = wline;
+
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_rds_wline(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 value;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_RDS_WLINE, &value);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (!err) {
+		bdev->fifo_size = value;
+		return value;
+	}
+
+	return err;
+}
+
+static int bcm2048_checkrev(struct bcm2048_device *bdev)
+{
+	int err;
+	u8 version;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_REV, &version);
+
+	mutex_unlock(&bdev->mutex);
+
+	if (!err) {
+		dev_info(&bdev->client->dev, "BCM2048 Version 0x%x\n",
+			version);
+		return version;
+	}
+
+	return err;
+}
+
+static int bcm2048_get_rds_rt(struct bcm2048_device *bdev, char *data)
+{
+	int err = 0, i, j = 0, ce = 0, cr = 0;
+	char data_buffer[BCM2048_MAX_RDS_RT+1];
+
+	mutex_lock(&bdev->mutex);
+
+	if (!bdev->rds_info.text_len) {
+		err = -EINVAL;
+		goto unlock;
+	}
+
+	for (i = 0; i < BCM2048_MAX_RDS_RT; i++) {
+		if (bdev->rds_info.rds_rt[i]) {
+			ce = i;
+			/* Skip the carriage return */
+			if (bdev->rds_info.rds_rt[i] != 0x0d) {
+				data_buffer[j++] = bdev->rds_info.rds_rt[i];
+			} else {
+				cr = i;
+				break;
+			}
+		}
+	}
+
+	if (j <= BCM2048_MAX_RDS_RT)
+		data_buffer[j] = 0;
+
+	for (i = 0; i < BCM2048_MAX_RDS_RT; i++) {
+		if (!bdev->rds_info.rds_rt[i]) {
+			if (cr && (i < cr)) {
+				err = -EBUSY;
+				goto unlock;
+			}
+			if (i < ce) {
+				if (cr && (i >= cr))
+					break;
+				err = -EBUSY;
+				goto unlock;
+			}
+		}
+	}
+
+	memcpy(data, data_buffer, sizeof(data_buffer));
+
+unlock:
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static int bcm2048_get_rds_ps(struct bcm2048_device *bdev, char *data)
+{
+	int err = 0, i, j = 0;
+	char data_buffer[BCM2048_MAX_RDS_PS+1];
+
+	mutex_lock(&bdev->mutex);
+
+	if (!bdev->rds_info.text_len) {
+		err = -EINVAL;
+		goto unlock;
+	}
+
+	for (i = 0; i < BCM2048_MAX_RDS_PS; i++) {
+		if (bdev->rds_info.rds_ps[i]) {
+			data_buffer[j++] = bdev->rds_info.rds_ps[i];
+		} else {
+			if (i < (BCM2048_MAX_RDS_PS - 1)) {
+				err = -EBUSY;
+				goto unlock;
+			}
+		}
+	}
+
+	if (j <= BCM2048_MAX_RDS_PS)
+		data_buffer[j] = 0;
+
+	memcpy(data, data_buffer, sizeof(data_buffer));
+
+unlock:
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+static void bcm2048_parse_rds_pi(struct bcm2048_device *bdev)
+{
+	int i, cnt = 0;
+	u16 pi;
+
+	for (i = 0; i < bdev->fifo_size; i += BCM2048_RDS_FIFO_DUPLE_SIZE) {
+
+		/* Block A match, only data without crc errors taken */
+		if (bdev->rds_info.radio_text[i] == BCM2048_RDS_BLOCK_A) {
+
+			pi = ((bdev->rds_info.radio_text[i+1] << 8) +
+				bdev->rds_info.radio_text[i+2]);
+
+			if (!bdev->rds_info.rds_pi) {
+				bdev->rds_info.rds_pi = pi;
+				return;
+			}
+			if (pi != bdev->rds_info.rds_pi) {
+				cnt++;
+				if (cnt > 3) {
+					bdev->rds_info.rds_pi = pi;
+					cnt = 0;
+				}
+			} else {
+				cnt = 0;
+			}
+		}
+	}
+}
+
+static int bcm2048_rds_block_crc(struct bcm2048_device *bdev, int i)
+{
+	return bdev->rds_info.radio_text[i] & BCM2048_RDS_CRC_MASK;
+}
+
+static void bcm2048_parse_rds_rt_block(struct bcm2048_device *bdev, int i,
+					int index, int crc)
+{
+	/* Good data will overwrite poor data */
+	if (crc) {
+		if (!bdev->rds_info.rds_rt[index])
+			bdev->rds_info.rds_rt[index] =
+				bdev->rds_info.radio_text[i+1];
+		if (!bdev->rds_info.rds_rt[index+1])
+			bdev->rds_info.rds_rt[index+1] =
+				bdev->rds_info.radio_text[i+2];
+	} else {
+		bdev->rds_info.rds_rt[index] = bdev->rds_info.radio_text[i+1];
+		bdev->rds_info.rds_rt[index+1] =
+			bdev->rds_info.radio_text[i+2];
+	}
+}
+
+static int bcm2048_parse_rt_match_b(struct bcm2048_device *bdev, int i)
+{
+	int crc, rt_id, rt_group_b, rt_ab, index = 0;
+
+	crc = bcm2048_rds_block_crc(bdev, i);
+
+	if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
+		return -EIO;
+
+	if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
+		BCM2048_RDS_BLOCK_B) {
+
+		rt_id = (bdev->rds_info.radio_text[i+1] &
+			BCM2048_RDS_BLOCK_MASK);
+		rt_group_b = bdev->rds_info.radio_text[i+1] &
+			BCM2048_RDS_GROUP_AB_MASK;
+		rt_ab = bdev->rds_info.radio_text[i+2] &
+				BCM2048_RDS_RT_AB_MASK;
+
+		if (rt_group_b != bdev->rds_info.rds_rt_group_b) {
+			memset(bdev->rds_info.rds_rt, 0,
+				sizeof(bdev->rds_info.rds_rt));
+			bdev->rds_info.rds_rt_group_b = rt_group_b;
+		}
+
+		if (rt_id == BCM2048_RDS_RT) {
+			/* A to B or (vice versa), means: clear screen */
+			if (rt_ab != bdev->rds_info.rds_rt_ab) {
+				memset(bdev->rds_info.rds_rt, 0,
+					sizeof(bdev->rds_info.rds_rt));
+				bdev->rds_info.rds_rt_ab = rt_ab;
+			}
+
+			index = bdev->rds_info.radio_text[i+2] &
+					BCM2048_RDS_RT_INDEX;
+
+			if (bdev->rds_info.rds_rt_group_b)
+				index <<= 1;
+			else
+				index <<= 2;
+
+			return index;
+		}
+	}
+
+	return -EIO;
+}
+
+static int bcm2048_parse_rt_match_c(struct bcm2048_device *bdev, int i,
+					int index)
+{
+	int crc;
+
+	crc = bcm2048_rds_block_crc(bdev, i);
+
+	if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
+		return 0;
+
+	BUG_ON((index+2) >= BCM2048_MAX_RDS_RT);
+
+	if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
+		BCM2048_RDS_BLOCK_C) {
+		if (bdev->rds_info.rds_rt_group_b)
+			return 1;
+		bcm2048_parse_rds_rt_block(bdev, i, index, crc);
+		return 1;
+	}
+
+	return 0;
+}
+
+static void bcm2048_parse_rt_match_d(struct bcm2048_device *bdev, int i,
+					int index)
+{
+	int crc;
+
+	crc = bcm2048_rds_block_crc(bdev, i);
+
+	if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
+		return;
+
+	BUG_ON((index+4) >= BCM2048_MAX_RDS_RT);
+
+	if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
+		BCM2048_RDS_BLOCK_D)
+		bcm2048_parse_rds_rt_block(bdev, i, index+2, crc);
+}
+
+static int bcm2048_parse_rds_rt(struct bcm2048_device *bdev)
+{
+	int i, index = 0, crc, match_b = 0, match_c = 0, match_d = 0;
+
+	for (i = 0; i < bdev->fifo_size; i += BCM2048_RDS_FIFO_DUPLE_SIZE) {
+
+		if (match_b) {
+			match_b = 0;
+			index = bcm2048_parse_rt_match_b(bdev, i);
+			if (index >= 0 && index <= (BCM2048_MAX_RDS_RT - 5))
+				match_c = 1;
+			continue;
+		} else if (match_c) {
+			match_c = 0;
+			if (bcm2048_parse_rt_match_c(bdev, i, index))
+				match_d = 1;
+			continue;
+		} else if (match_d) {
+			match_d = 0;
+			bcm2048_parse_rt_match_d(bdev, i, index);
+			continue;
+		}
+
+		/* Skip erroneous blocks due to messed up A block altogether */
+		if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK)
+			== BCM2048_RDS_BLOCK_A) {
+			crc = bcm2048_rds_block_crc(bdev, i);
+			if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
+				continue;
+			/* Syncronize to a good RDS PI */
+			if (((bdev->rds_info.radio_text[i+1] << 8) +
+				bdev->rds_info.radio_text[i+2]) ==
+				bdev->rds_info.rds_pi)
+					match_b = 1;
+		}
+	}
+
+	return 0;
+}
+
+static void bcm2048_parse_rds_ps_block(struct bcm2048_device *bdev, int i,
+					int index, int crc)
+{
+	/* Good data will overwrite poor data */
+	if (crc) {
+		if (!bdev->rds_info.rds_ps[index])
+			bdev->rds_info.rds_ps[index] =
+				bdev->rds_info.radio_text[i+1];
+		if (!bdev->rds_info.rds_ps[index+1])
+			bdev->rds_info.rds_ps[index+1] =
+				bdev->rds_info.radio_text[i+2];
+	} else {
+		bdev->rds_info.rds_ps[index] = bdev->rds_info.radio_text[i+1];
+		bdev->rds_info.rds_ps[index+1] =
+			bdev->rds_info.radio_text[i+2];
+	}
+}
+
+static int bcm2048_parse_ps_match_c(struct bcm2048_device *bdev, int i,
+					int index)
+{
+	int crc;
+
+	crc = bcm2048_rds_block_crc(bdev, i);
+
+	if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
+		return 0;
+
+	if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
+		BCM2048_RDS_BLOCK_C)
+		return 1;
+
+	return 0;
+}
+
+static void bcm2048_parse_ps_match_d(struct bcm2048_device *bdev, int i,
+					int index)
+{
+	int crc;
+
+	crc = bcm2048_rds_block_crc(bdev, i);
+
+	if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
+		return;
+
+	if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
+		BCM2048_RDS_BLOCK_D)
+		bcm2048_parse_rds_ps_block(bdev, i, index, crc);
+}
+
+static int bcm2048_parse_ps_match_b(struct bcm2048_device *bdev, int i)
+{
+	int crc, index, ps_id, ps_group;
+
+	crc = bcm2048_rds_block_crc(bdev, i);
+
+	if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
+		return -EIO;
+
+	/* Block B Radio PS match */
+	if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
+		BCM2048_RDS_BLOCK_B) {
+		ps_id = bdev->rds_info.radio_text[i+1] &
+			BCM2048_RDS_BLOCK_MASK;
+		ps_group = bdev->rds_info.radio_text[i+1] &
+			BCM2048_RDS_GROUP_AB_MASK;
+
+		/*
+		 * Poor RSSI will lead to RDS data corruption
+		 * So using 3 (same) sequential values to justify major changes
+		 */
+		if (ps_group != bdev->rds_info.rds_ps_group) {
+			if (crc == BCM2048_RDS_CRC_NONE) {
+				bdev->rds_info.rds_ps_group_cnt++;
+				if (bdev->rds_info.rds_ps_group_cnt > 2) {
+					bdev->rds_info.rds_ps_group = ps_group;
+					bdev->rds_info.rds_ps_group_cnt	= 0;
+					dev_err(&bdev->client->dev,
+						"RDS PS Group change!\n");
+				} else {
+					return -EIO;
+				}
+			} else {
+				bdev->rds_info.rds_ps_group_cnt = 0;
+			}
+		}
+
+		if (ps_id == BCM2048_RDS_PS) {
+			index = bdev->rds_info.radio_text[i+2] &
+				BCM2048_RDS_PS_INDEX;
+			index <<= 1;
+			return index;
+		}
+	}
+
+	return -EIO;
+}
+
+static void bcm2048_parse_rds_ps(struct bcm2048_device *bdev)
+{
+	int i, index = 0, crc, match_b = 0, match_c = 0, match_d = 0;
+
+	for (i = 0; i < bdev->fifo_size; i += BCM2048_RDS_FIFO_DUPLE_SIZE) {
+
+		if (match_b) {
+			match_b = 0;
+			index = bcm2048_parse_ps_match_b(bdev, i);
+			if (index >= 0 && index < (BCM2048_MAX_RDS_PS - 1))
+				match_c = 1;
+			continue;
+		} else if (match_c) {
+			match_c = 0;
+			if (bcm2048_parse_ps_match_c(bdev, i, index))
+				match_d = 1;
+			continue;
+		} else if (match_d) {
+			match_d = 0;
+			bcm2048_parse_ps_match_d(bdev, i, index);
+			continue;
+		}
+
+		/* Skip erroneous blocks due to messed up A block altogether */
+		if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK)
+			== BCM2048_RDS_BLOCK_A) {
+			crc = bcm2048_rds_block_crc(bdev, i);
+			if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
+				continue;
+			/* Syncronize to a good RDS PI */
+			if (((bdev->rds_info.radio_text[i+1] << 8) +
+				bdev->rds_info.radio_text[i+2]) ==
+				bdev->rds_info.rds_pi)
+					match_b = 1;
+		}
+	}
+}
+
+static void bcm2048_rds_fifo_receive(struct bcm2048_device *bdev)
+{
+	int err;
+
+	mutex_lock(&bdev->mutex);
+
+	err = bcm2048_recv_duples(bdev, BCM2048_I2C_RDS_DATA,
+				bdev->rds_info.radio_text, bdev->fifo_size);
+	if (err != 2) {
+		dev_err(&bdev->client->dev, "RDS Read problem\n");
+		return;
+	}
+
+	bdev->rds_info.text_len = bdev->fifo_size;
+
+	bcm2048_parse_rds_pi(bdev);
+	bcm2048_parse_rds_rt(bdev);
+	bcm2048_parse_rds_ps(bdev);
+
+	mutex_unlock(&bdev->mutex);
+
+	wake_up_interruptible(&bdev->read_queue);
+}
+
+static int bcm2048_get_rds_data(struct bcm2048_device *bdev, char *data)
+{
+	int err = 0, i, p = 0;
+	char *data_buffer;
+
+	mutex_lock(&bdev->mutex);
+
+	if (!bdev->rds_info.text_len) {
+		err = -EINVAL;
+		goto unlock;
+	}
+
+	data_buffer = kzalloc(BCM2048_MAX_RDS_RADIO_TEXT*5, GFP_KERNEL);
+	if (!data_buffer) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	for (i = 0; i < bdev->rds_info.text_len; i++) {
+		p += sprintf(data_buffer+p, "%x ",
+			bdev->rds_info.radio_text[i]);
+	}
+
+	memcpy(data, data_buffer, p);
+	kfree(data_buffer);
+
+unlock:
+	mutex_unlock(&bdev->mutex);
+	return err;
+}
+
+/*
+ *	BCM2048 default initialization sequence
+ */
+static int bcm2048_init(struct bcm2048_device *bdev)
+{
+	int err;
+
+	err = bcm2048_set_power_state(bdev, BCM2048_POWER_ON);
+	if (err < 0)
+		goto exit;
+
+	err = bcm2048_set_audio_route(bdev, BCM2048_AUDIO_ROUTE_DAC);
+	if (err < 0)
+		goto exit;
+
+	err = bcm2048_set_dac_output(bdev, BCM2048_DAC_OUTPUT_LEFT |
+		BCM2048_DAC_OUTPUT_RIGHT);
+
+exit:
+	return err;
+}
+
+/*
+ *	BCM2048 default deinitialization sequence
+ */
+static int bcm2048_deinit(struct bcm2048_device *bdev)
+{
+	int err;
+
+	err = bcm2048_set_audio_route(bdev, 0);
+	if (err < 0)
+		goto exit;
+
+	err = bcm2048_set_dac_output(bdev, 0);
+	if (err < 0)
+		goto exit;
+
+	err = bcm2048_set_power_state(bdev, BCM2048_POWER_OFF);
+	if (err < 0)
+		goto exit;
+
+exit:
+	return err;
+}
+
+/*
+ *	BCM2048 probe sequence
+ */
+static int bcm2048_probe(struct bcm2048_device *bdev)
+{
+	int err;
+
+	err = bcm2048_set_power_state(bdev, BCM2048_POWER_ON);
+	if (err < 0)
+		goto unlock;
+
+	err = bcm2048_checkrev(bdev);
+	if (err < 0)
+		goto unlock;
+
+	err = bcm2048_set_mute(bdev, BCM2048_DEFAULT_MUTE);
+	if (err < 0)
+		goto unlock;
+
+	err = bcm2048_set_region(bdev, BCM2048_DEFAULT_REGION);
+	if (err < 0)
+		goto unlock;
+
+	err = bcm2048_set_fm_search_rssi_threshold(bdev,
+					BCM2048_DEFAULT_RSSI_THRESHOLD);
+	if (err < 0)
+		goto unlock;
+
+	err = bcm2048_set_fm_automatic_stereo_mono(bdev, BCM2048_ITEM_ENABLED);
+	if (err < 0)
+		goto unlock;
+
+	err = bcm2048_get_rds_wline(bdev);
+	if (err < BCM2048_DEFAULT_RDS_WLINE)
+		err = bcm2048_set_rds_wline(bdev, BCM2048_DEFAULT_RDS_WLINE);
+	if (err < 0)
+		goto unlock;
+
+	err = bcm2048_set_power_state(bdev, BCM2048_POWER_OFF);
+
+	init_waitqueue_head(&bdev->read_queue);
+	bdev->rds_data_available = 0;
+	bdev->rd_index = 0;
+	bdev->users = 0;
+
+unlock:
+	return err;
+}
+
+/*
+ *	BCM2048 workqueue handler
+ */
+static void bcm2048_work(struct work_struct *work)
+{
+	struct bcm2048_device *bdev;
+	u8 flag_lsb, flag_msb, flags;
+
+	bdev = container_of(work, struct bcm2048_device, work);
+	bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_FLAG0, &flag_lsb);
+	bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_FLAG1, &flag_msb);
+
+	if (flag_lsb & (BCM2048_FM_FLAG_SEARCH_TUNE_FINISHED |
+			BCM2048_FM_FLAG_SEARCH_TUNE_FAIL)) {
+
+		if (flag_lsb & BCM2048_FM_FLAG_SEARCH_TUNE_FAIL)
+			bdev->scan_state = BCM2048_SCAN_FAIL;
+		else
+			bdev->scan_state = BCM2048_SCAN_OK;
+
+		complete(&bdev->compl);
+	}
+
+	if (flag_msb & BCM2048_RDS_FLAG_FIFO_WLINE) {
+		bcm2048_rds_fifo_receive(bdev);
+		if (bdev->rds_state) {
+			flags =	BCM2048_RDS_FLAG_FIFO_WLINE;
+			bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_MASK1,
+						flags);
+		}
+		bdev->rds_data_available = 1;
+		bdev->rd_index = 0; /* new data, new start */
+	}
+}
+
+/*
+ *	BCM2048 interrupt handler
+ */
+static irqreturn_t bcm2048_handler(int irq, void *dev)
+{
+	struct bcm2048_device *bdev = dev;
+
+	dev_dbg(&bdev->client->dev, "IRQ called, queuing work\n");
+	if (bdev->power_state)
+		schedule_work(&bdev->work);
+
+	return IRQ_HANDLED;
+}
+
+/*
+ *	BCM2048 sysfs interface definitions
+ */
+#define property_write(prop, type, mask, check)				\
+static ssize_t bcm2048_##prop##_write(struct device *dev,		\
+					struct device_attribute *attr,	\
+					const char *buf,		\
+					size_t count)			\
+{									\
+	struct bcm2048_device *bdev = dev_get_drvdata(dev);		\
+	type value;							\
+	int err;							\
+									\
+	if (!bdev)							\
+		return -ENODEV;						\
+									\
+	sscanf(buf, mask, &value);					\
+									\
+	if (check)							\
+		return -EDOM;						\
+									\
+	err = bcm2048_set_##prop(bdev, value);				\
+									\
+	return err < 0 ? err : count;					\
+}
+
+#define property_read(prop, size, mask)					\
+static ssize_t bcm2048_##prop##_read(struct device *dev,		\
+					struct device_attribute *attr,	\
+					char *buf)			\
+{									\
+	struct bcm2048_device *bdev = dev_get_drvdata(dev);		\
+	size value;							\
+									\
+	if (!bdev)							\
+		return -ENODEV;						\
+									\
+	value = bcm2048_get_##prop(bdev);				\
+									\
+	if (value >= 0)							\
+		value = sprintf(buf, mask "\n", value);			\
+									\
+	return value;							\
+}
+
+#define property_signed_read(prop, size, mask)				\
+static ssize_t bcm2048_##prop##_read(struct device *dev,		\
+					struct device_attribute *attr,	\
+					char *buf)			\
+{									\
+	struct bcm2048_device *bdev = dev_get_drvdata(dev);		\
+	size value;							\
+									\
+	if (!bdev)							\
+		return -ENODEV;						\
+									\
+	value = bcm2048_get_##prop(bdev);				\
+									\
+	value = sprintf(buf, mask "\n", value);				\
+									\
+	return value;							\
+}
+
+#define DEFINE_SYSFS_PROPERTY(prop, signal, size, mask, check)		\
+property_write(prop, signal size, mask, check)				\
+property_read(prop, size, mask)
+
+#define property_str_read(prop, size)					\
+static ssize_t bcm2048_##prop##_read(struct device *dev,		\
+					struct device_attribute *attr,	\
+					char *buf)			\
+{									\
+	struct bcm2048_device *bdev = dev_get_drvdata(dev);		\
+	int count;							\
+	u8 *out;							\
+									\
+	if (!bdev)							\
+		return -ENODEV;						\
+									\
+	out = kzalloc(size + 1, GFP_KERNEL);				\
+	if (!out)							\
+		return -ENOMEM;						\
+									\
+	bcm2048_get_##prop(bdev, out);					\
+	count = sprintf(buf, "%s\n", out);				\
+									\
+	kfree(out);							\
+									\
+	return count;							\
+}
+
+DEFINE_SYSFS_PROPERTY(power_state, unsigned, int, "%u", 0)
+DEFINE_SYSFS_PROPERTY(mute, unsigned, int, "%u", 0)
+DEFINE_SYSFS_PROPERTY(audio_route, unsigned, int, "%u", 0)
+DEFINE_SYSFS_PROPERTY(dac_output, unsigned, int, "%u", 0)
+
+DEFINE_SYSFS_PROPERTY(fm_hi_lo_injection, unsigned, int, "%u", 0)
+DEFINE_SYSFS_PROPERTY(fm_frequency, unsigned, int, "%u", 0)
+DEFINE_SYSFS_PROPERTY(fm_af_frequency, unsigned, int, "%u", 0)
+DEFINE_SYSFS_PROPERTY(fm_deemphasis, unsigned, int, "%u", 0)
+DEFINE_SYSFS_PROPERTY(fm_rds_mask, unsigned, int, "%u", 0)
+DEFINE_SYSFS_PROPERTY(fm_best_tune_mode, unsigned, int, "%u", 0)
+DEFINE_SYSFS_PROPERTY(fm_search_rssi_threshold, unsigned, int, "%u", 0)
+DEFINE_SYSFS_PROPERTY(fm_search_mode_direction, unsigned, int, "%u", 0)
+DEFINE_SYSFS_PROPERTY(fm_search_tune_mode, unsigned, int, "%u", value > 3)
+
+DEFINE_SYSFS_PROPERTY(rds, unsigned, int, "%u", 0)
+DEFINE_SYSFS_PROPERTY(rds_b_block_mask, unsigned, int, "%u", 0)
+DEFINE_SYSFS_PROPERTY(rds_b_block_match, unsigned, int, "%u", 0)
+DEFINE_SYSFS_PROPERTY(rds_pi_mask, unsigned, int, "%u", 0)
+DEFINE_SYSFS_PROPERTY(rds_pi_match, unsigned, int, "%u", 0)
+DEFINE_SYSFS_PROPERTY(rds_wline, unsigned, int, "%u", 0)
+property_read(rds_pi, unsigned int, "%x")
+property_str_read(rds_rt, (BCM2048_MAX_RDS_RT + 1))
+property_str_read(rds_ps, (BCM2048_MAX_RDS_PS + 1))
+
+property_read(fm_rds_flags, unsigned int, "%u")
+property_str_read(rds_data, BCM2048_MAX_RDS_RADIO_TEXT*5)
+
+property_read(region_bottom_frequency, unsigned int, "%u")
+property_read(region_top_frequency, unsigned int, "%u")
+property_signed_read(fm_carrier_error, int, "%d")
+property_signed_read(fm_rssi, int, "%d")
+DEFINE_SYSFS_PROPERTY(region, unsigned, int, "%u", 0)
+
+static struct device_attribute attrs[] = {
+	__ATTR(power_state, S_IRUGO | S_IWUSR, bcm2048_power_state_read,
+		bcm2048_power_state_write),
+	__ATTR(mute, S_IRUGO | S_IWUSR, bcm2048_mute_read,
+		bcm2048_mute_write),
+	__ATTR(audio_route, S_IRUGO | S_IWUSR, bcm2048_audio_route_read,
+		bcm2048_audio_route_write),
+	__ATTR(dac_output, S_IRUGO | S_IWUSR, bcm2048_dac_output_read,
+		bcm2048_dac_output_write),
+	__ATTR(fm_hi_lo_injection, S_IRUGO | S_IWUSR,
+		bcm2048_fm_hi_lo_injection_read,
+		bcm2048_fm_hi_lo_injection_write),
+	__ATTR(fm_frequency, S_IRUGO | S_IWUSR, bcm2048_fm_frequency_read,
+		bcm2048_fm_frequency_write),
+	__ATTR(fm_af_frequency, S_IRUGO | S_IWUSR,
+		bcm2048_fm_af_frequency_read,
+		bcm2048_fm_af_frequency_write),
+	__ATTR(fm_deemphasis, S_IRUGO | S_IWUSR, bcm2048_fm_deemphasis_read,
+		bcm2048_fm_deemphasis_write),
+	__ATTR(fm_rds_mask, S_IRUGO | S_IWUSR, bcm2048_fm_rds_mask_read,
+		bcm2048_fm_rds_mask_write),
+	__ATTR(fm_best_tune_mode, S_IRUGO | S_IWUSR,
+		bcm2048_fm_best_tune_mode_read,
+		bcm2048_fm_best_tune_mode_write),
+	__ATTR(fm_search_rssi_threshold, S_IRUGO | S_IWUSR,
+		bcm2048_fm_search_rssi_threshold_read,
+		bcm2048_fm_search_rssi_threshold_write),
+	__ATTR(fm_search_mode_direction, S_IRUGO | S_IWUSR,
+		bcm2048_fm_search_mode_direction_read,
+		bcm2048_fm_search_mode_direction_write),
+	__ATTR(fm_search_tune_mode, S_IRUGO | S_IWUSR,
+		bcm2048_fm_search_tune_mode_read,
+		bcm2048_fm_search_tune_mode_write),
+	__ATTR(rds, S_IRUGO | S_IWUSR, bcm2048_rds_read,
+		bcm2048_rds_write),
+	__ATTR(rds_b_block_mask, S_IRUGO | S_IWUSR,
+		bcm2048_rds_b_block_mask_read,
+		bcm2048_rds_b_block_mask_write),
+	__ATTR(rds_b_block_match, S_IRUGO | S_IWUSR,
+		bcm2048_rds_b_block_match_read,
+		bcm2048_rds_b_block_match_write),
+	__ATTR(rds_pi_mask, S_IRUGO | S_IWUSR, bcm2048_rds_pi_mask_read,
+		bcm2048_rds_pi_mask_write),
+	__ATTR(rds_pi_match, S_IRUGO | S_IWUSR, bcm2048_rds_pi_match_read,
+		bcm2048_rds_pi_match_write),
+	__ATTR(rds_wline, S_IRUGO | S_IWUSR, bcm2048_rds_wline_read,
+		bcm2048_rds_wline_write),
+	__ATTR(rds_pi, S_IRUGO, bcm2048_rds_pi_read, NULL),
+	__ATTR(rds_rt, S_IRUGO, bcm2048_rds_rt_read, NULL),
+	__ATTR(rds_ps, S_IRUGO, bcm2048_rds_ps_read, NULL),
+	__ATTR(fm_rds_flags, S_IRUGO, bcm2048_fm_rds_flags_read, NULL),
+	__ATTR(region_bottom_frequency, S_IRUGO,
+		bcm2048_region_bottom_frequency_read, NULL),
+	__ATTR(region_top_frequency, S_IRUGO,
+		bcm2048_region_top_frequency_read, NULL),
+	__ATTR(fm_carrier_error, S_IRUGO,
+		bcm2048_fm_carrier_error_read, NULL),
+	__ATTR(fm_rssi, S_IRUGO,
+		bcm2048_fm_rssi_read, NULL),
+	__ATTR(region, S_IRUGO | S_IWUSR, bcm2048_region_read,
+		bcm2048_region_write),
+	__ATTR(rds_data, S_IRUGO, bcm2048_rds_data_read, NULL),
+};
+
+static int bcm2048_sysfs_unregister_properties(struct bcm2048_device *bdev,
+						int size)
+{
+	int i;
+
+	for (i = 0; i < size; i++)
+		device_remove_file(&bdev->client->dev, &attrs[i]);
+
+	return 0;
+}
+
+static int bcm2048_sysfs_register_properties(struct bcm2048_device *bdev)
+{
+	int err = 0;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(attrs); i++) {
+		if (device_create_file(&bdev->client->dev, &attrs[i]) != 0) {
+			dev_err(&bdev->client->dev,
+					"could not register sysfs entry\n");
+			err = -EBUSY;
+			bcm2048_sysfs_unregister_properties(bdev, i);
+			break;
+		}
+	}
+
+	return err;
+}
+
+
+static int bcm2048_fops_open(struct file *file)
+{
+	struct bcm2048_device *bdev = video_drvdata(file);
+
+	bdev->users++;
+	bdev->rd_index = 0;
+	bdev->rds_data_available = 0;
+
+	return 0;
+}
+
+static int bcm2048_fops_release(struct file *file)
+{
+	struct bcm2048_device *bdev = video_drvdata(file);
+
+	bdev->users--;
+
+	return 0;
+}
+
+static unsigned int bcm2048_fops_poll(struct file *file,
+		struct poll_table_struct *pts)
+{
+	struct bcm2048_device *bdev = video_drvdata(file);
+	int retval = 0;
+
+	poll_wait(file, &bdev->read_queue, pts);
+
+	if (bdev->rds_data_available)
+		retval = POLLIN | POLLRDNORM;
+
+	return retval;
+}
+
+static ssize_t bcm2048_fops_read(struct file *file, char __user *buf,
+	size_t count, loff_t *ppos)
+{
+	struct bcm2048_device *bdev = video_drvdata(file);
+	int i;
+	int retval = 0;
+
+	/* we return at least 3 bytes, one block */
+	count = (count / 3) * 3; /* only multiples of 3 */
+	if (count < 3)
+		return -ENOBUFS;
+
+	while (!bdev->rds_data_available) {
+		if (file->f_flags & O_NONBLOCK) {
+			retval = -EWOULDBLOCK;
+			goto done;
+		}
+		/* interruptible_sleep_on(&bdev->read_queue); */
+		if (wait_event_interruptible(bdev->read_queue,
+			bdev->rds_data_available) < 0) {
+			retval = -EINTR;
+			goto done;
+		}
+	}
+
+	mutex_lock(&bdev->mutex);
+	/* copy data to userspace */
+	i = bdev->fifo_size - bdev->rd_index;
+	if (count > i)
+		count = (i / 3) * 3;
+
+	i = 0;
+	while (i < count) {
+		unsigned char tmpbuf[3];
+		tmpbuf[i] = bdev->rds_info.radio_text[bdev->rd_index+i+2];
+		tmpbuf[i+1] = bdev->rds_info.radio_text[bdev->rd_index+i+1];
+		tmpbuf[i+2] = ((bdev->rds_info.radio_text[bdev->rd_index+i]
+				& 0xf0) >> 4);
+		if ((bdev->rds_info.radio_text[bdev->rd_index+i] &
+			BCM2048_RDS_CRC_MASK) == BCM2048_RDS_CRC_UNRECOVARABLE)
+			tmpbuf[i+2] |= 0x80;
+		if (copy_to_user(buf+i, tmpbuf, 3)) {
+			retval = -EFAULT;
+			break;
+		};
+		i += 3;
+	}
+
+	bdev->rd_index += i;
+	if (bdev->rd_index >= bdev->fifo_size)
+		bdev->rds_data_available = 0;
+
+	mutex_unlock(&bdev->mutex);
+	if (retval == 0)
+		retval = i;
+
+done:
+	return retval;
+}
+
+/*
+ *	bcm2048_fops - file operations interface
+ */
+static const struct v4l2_file_operations bcm2048_fops = {
+	.owner		= THIS_MODULE,
+	.ioctl		= video_ioctl2,
+	/* for RDS read support */
+	.open		= bcm2048_fops_open,
+	.release	= bcm2048_fops_release,
+	.read		= bcm2048_fops_read,
+	.poll		= bcm2048_fops_poll
+};
+
+/*
+ *	Video4Linux Interface
+ */
+static struct v4l2_queryctrl bcm2048_v4l2_queryctrl[] = {
+	{
+		.id		= V4L2_CID_AUDIO_VOLUME,
+		.flags		= V4L2_CTRL_FLAG_DISABLED,
+	},
+	{
+		.id		= V4L2_CID_AUDIO_BALANCE,
+		.flags		= V4L2_CTRL_FLAG_DISABLED,
+	},
+	{
+		.id		= V4L2_CID_AUDIO_BASS,
+		.flags		= V4L2_CTRL_FLAG_DISABLED,
+	},
+	{
+		.id		= V4L2_CID_AUDIO_TREBLE,
+		.flags		= V4L2_CTRL_FLAG_DISABLED,
+	},
+	{
+		.id		= V4L2_CID_AUDIO_MUTE,
+		.type		= V4L2_CTRL_TYPE_BOOLEAN,
+		.name		= "Mute",
+		.minimum	= 0,
+		.maximum	= 1,
+		.step		= 1,
+		.default_value	= 1,
+	},
+	{
+		.id		= V4L2_CID_AUDIO_LOUDNESS,
+		.flags		= V4L2_CTRL_FLAG_DISABLED,
+	},
+};
+
+static int bcm2048_vidioc_querycap(struct file *file, void *priv,
+		struct v4l2_capability *capability)
+{
+	struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
+
+	strlcpy(capability->driver, BCM2048_DRIVER_NAME,
+		sizeof(capability->driver));
+	strlcpy(capability->card, BCM2048_DRIVER_CARD,
+		sizeof(capability->card));
+	snprintf(capability->bus_info, 32, "I2C: 0x%X", bdev->client->addr);
+	capability->version = BCM2048_DRIVER_VERSION;
+	capability->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO |
+					V4L2_CAP_HW_FREQ_SEEK;
+
+	return 0;
+}
+
+static int bcm2048_vidioc_g_input(struct file *filp, void *priv,
+		unsigned int *i)
+{
+	*i = 0;
+
+	return 0;
+}
+
+static int bcm2048_vidioc_s_input(struct file *filp, void *priv,
+					unsigned int i)
+{
+	if (i)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int bcm2048_vidioc_queryctrl(struct file *file, void *priv,
+		struct v4l2_queryctrl *qc)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(bcm2048_v4l2_queryctrl); i++) {
+		if (qc->id && qc->id == bcm2048_v4l2_queryctrl[i].id) {
+			memcpy(qc, &(bcm2048_v4l2_queryctrl[i]), sizeof(*qc));
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int bcm2048_vidioc_g_ctrl(struct file *file, void *priv,
+		struct v4l2_control *ctrl)
+{
+	struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
+	int err = 0;
+
+	if (!bdev)
+		return -ENODEV;
+
+	switch (ctrl->id) {
+	case V4L2_CID_AUDIO_MUTE:
+		err = bcm2048_get_mute(bdev);
+		if (err >= 0)
+			ctrl->value = err;
+		break;
+	}
+
+	return err;
+}
+
+static int bcm2048_vidioc_s_ctrl(struct file *file, void *priv,
+		struct v4l2_control *ctrl)
+{
+	struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
+	int err = 0;
+
+	if (!bdev)
+		return -ENODEV;
+
+	switch (ctrl->id) {
+	case V4L2_CID_AUDIO_MUTE:
+		if (ctrl->value) {
+			if (bdev->power_state) {
+				err = bcm2048_set_mute(bdev, ctrl->value);
+				err |= bcm2048_deinit(bdev);
+			}
+		} else {
+			if (!bdev->power_state) {
+				err = bcm2048_init(bdev);
+				err |= bcm2048_set_mute(bdev, ctrl->value);
+			}
+		}
+		break;
+	}
+
+	return err;
+}
+
+static int bcm2048_vidioc_g_audio(struct file *file, void *priv,
+		struct v4l2_audio *audio)
+{
+	if (audio->index > 1)
+		return -EINVAL;
+
+	strncpy(audio->name, "Radio", 32);
+	audio->capability = V4L2_AUDCAP_STEREO;
+
+	return 0;
+}
+
+static int bcm2048_vidioc_s_audio(struct file *file, void *priv,
+		const struct v4l2_audio *audio)
+{
+	if (audio->index != 0)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int bcm2048_vidioc_g_tuner(struct file *file, void *priv,
+		struct v4l2_tuner *tuner)
+{
+	struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
+	s8 f_error;
+	s8 rssi;
+
+	if (!bdev)
+		return -ENODEV;
+
+	if (tuner->index > 0)
+		return -EINVAL;
+
+	strncpy(tuner->name, "FM Receiver", 32);
+	tuner->type = V4L2_TUNER_RADIO;
+	tuner->rangelow =
+		dev_to_v4l2(bcm2048_get_region_bottom_frequency(bdev));
+	tuner->rangehigh =
+		dev_to_v4l2(bcm2048_get_region_top_frequency(bdev));
+	tuner->rxsubchans = V4L2_TUNER_SUB_STEREO;
+	tuner->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW;
+	tuner->audmode = V4L2_TUNER_MODE_STEREO;
+	tuner->afc = 0;
+	if (bdev->power_state) {
+		/*
+		 * Report frequencies with high carrier errors to have zero
+		 * signal level
+		 */
+		f_error = bcm2048_get_fm_carrier_error(bdev);
+		if (f_error < BCM2048_FREQ_ERROR_FLOOR ||
+		    f_error > BCM2048_FREQ_ERROR_ROOF) {
+			tuner->signal = 0;
+		} else {
+			/*
+			 * RSSI level -60 dB is defined to report full
+			 * signal strenght
+			 */
+			rssi = bcm2048_get_fm_rssi(bdev);
+			if (rssi >= BCM2048_RSSI_LEVEL_BASE) {
+				tuner->signal = 0xFFFF;
+			} else if (rssi > BCM2048_RSSI_LEVEL_ROOF) {
+				tuner->signal = (rssi +
+						 BCM2048_RSSI_LEVEL_ROOF_NEG)
+						 * BCM2048_SIGNAL_MULTIPLIER;
+			} else {
+				tuner->signal = 0;
+			}
+		}
+	} else {
+		tuner->signal = 0;
+	}
+
+	return 0;
+}
+
+static int bcm2048_vidioc_s_tuner(struct file *file, void *priv,
+		const struct v4l2_tuner *tuner)
+{
+	struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
+
+	if (!bdev)
+		return -ENODEV;
+
+	if (tuner->index > 0)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int bcm2048_vidioc_g_frequency(struct file *file, void *priv,
+		struct v4l2_frequency *freq)
+{
+	struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
+	int err = 0;
+	int f;
+
+	if (!bdev->power_state)
+		return -ENODEV;
+
+	freq->type = V4L2_TUNER_RADIO;
+	f = bcm2048_get_fm_frequency(bdev);
+
+	if (f < 0)
+		err = f;
+	else
+		freq->frequency = dev_to_v4l2(f);
+
+	return err;
+}
+
+static int bcm2048_vidioc_s_frequency(struct file *file, void *priv,
+		const struct v4l2_frequency *freq)
+{
+	struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
+	int err;
+
+	if (freq->type != V4L2_TUNER_RADIO)
+		return -EINVAL;
+
+	if (!bdev->power_state)
+		return -ENODEV;
+
+	err = bcm2048_set_fm_frequency(bdev, v4l2_to_dev(freq->frequency));
+	err |= bcm2048_set_fm_search_tune_mode(bdev, BCM2048_FM_PRE_SET_MODE);
+
+	return err;
+}
+
+static int bcm2048_vidioc_s_hw_freq_seek(struct file *file, void *priv,
+					const struct v4l2_hw_freq_seek *seek)
+{
+	struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
+	int err;
+
+	if (!bdev->power_state)
+		return -ENODEV;
+
+	if ((seek->tuner != 0) || (seek->type != V4L2_TUNER_RADIO))
+		return -EINVAL;
+
+	err = bcm2048_set_fm_search_mode_direction(bdev, seek->seek_upward);
+	err |= bcm2048_set_fm_search_tune_mode(bdev,
+			BCM2048_FM_AUTO_SEARCH_MODE);
+
+	return err;
+}
+
+static struct v4l2_ioctl_ops bcm2048_ioctl_ops = {
+	.vidioc_querycap	= bcm2048_vidioc_querycap,
+	.vidioc_g_input		= bcm2048_vidioc_g_input,
+	.vidioc_s_input		= bcm2048_vidioc_s_input,
+	.vidioc_queryctrl	= bcm2048_vidioc_queryctrl,
+	.vidioc_g_ctrl		= bcm2048_vidioc_g_ctrl,
+	.vidioc_s_ctrl		= bcm2048_vidioc_s_ctrl,
+	.vidioc_g_audio		= bcm2048_vidioc_g_audio,
+	.vidioc_s_audio		= bcm2048_vidioc_s_audio,
+	.vidioc_g_tuner		= bcm2048_vidioc_g_tuner,
+	.vidioc_s_tuner		= bcm2048_vidioc_s_tuner,
+	.vidioc_g_frequency	= bcm2048_vidioc_g_frequency,
+	.vidioc_s_frequency	= bcm2048_vidioc_s_frequency,
+	.vidioc_s_hw_freq_seek  = bcm2048_vidioc_s_hw_freq_seek,
+};
+
+/*
+ * bcm2048_viddev_template - video device interface
+ */
+static struct video_device bcm2048_viddev_template = {
+	.fops			= &bcm2048_fops,
+	.name			= BCM2048_DRIVER_NAME,
+	.release		= video_device_release,
+	.ioctl_ops		= &bcm2048_ioctl_ops,
+};
+
+/*
+ *	I2C driver interface
+ */
+static int bcm2048_i2c_driver_probe(struct i2c_client *client,
+					const struct i2c_device_id *id)
+{
+	struct bcm2048_device *bdev;
+	int err, skip_release = 0;
+
+	bdev = kzalloc(sizeof(*bdev), GFP_KERNEL);
+	if (!bdev) {
+		dev_dbg(&client->dev, "Failed to alloc video device.\n");
+		err = -ENOMEM;
+		goto exit;
+	}
+
+	bdev->videodev = video_device_alloc();
+	if (!bdev->videodev) {
+		dev_dbg(&client->dev, "Failed to alloc video device.\n");
+		err = -ENOMEM;
+		goto free_bdev;
+	}
+
+	bdev->client = client;
+	i2c_set_clientdata(client, bdev);
+	mutex_init(&bdev->mutex);
+	init_completion(&bdev->compl);
+	INIT_WORK(&bdev->work, bcm2048_work);
+
+	if (client->irq) {
+		err = request_irq(client->irq,
+			bcm2048_handler, IRQF_TRIGGER_FALLING | IRQF_DISABLED,
+			client->name, bdev);
+		if (err < 0) {
+			dev_err(&client->dev, "Could not request IRQ\n");
+			goto free_vdev;
+		}
+		dev_dbg(&client->dev, "IRQ requested.\n");
+	} else {
+		dev_dbg(&client->dev, "IRQ not configured. Using timeouts.\n");
+	}
+
+	memcpy(bdev->videodev, &bcm2048_viddev_template,
+			sizeof(bcm2048_viddev_template));
+	video_set_drvdata(bdev->videodev, bdev);
+	if (video_register_device(bdev->videodev, VFL_TYPE_RADIO, radio_nr)) {
+		dev_dbg(&client->dev, "Could not register video device.\n");
+		err = -EIO;
+		goto free_irq;
+	}
+
+	err = bcm2048_sysfs_register_properties(bdev);
+	if (err < 0) {
+		dev_dbg(&client->dev, "Could not register sysfs interface.\n");
+		goto free_registration;
+	}
+
+	err = bcm2048_probe(bdev);
+	if (err < 0) {
+		dev_dbg(&client->dev, "Failed to probe device information.\n");
+		goto free_sysfs;
+	}
+
+	return 0;
+
+free_sysfs:
+	bcm2048_sysfs_unregister_properties(bdev, ARRAY_SIZE(attrs));
+free_registration:
+	video_unregister_device(bdev->videodev);
+	/* video_unregister_device frees bdev->videodev */
+	bdev->videodev = NULL;
+	skip_release = 1;
+free_irq:
+	if (client->irq)
+		free_irq(client->irq, bdev);
+free_vdev:
+	if (!skip_release)
+		video_device_release(bdev->videodev);
+	i2c_set_clientdata(client, NULL);
+free_bdev:
+	kfree(bdev);
+exit:
+	return err;
+}
+
+static int __exit bcm2048_i2c_driver_remove(struct i2c_client *client)
+{
+	struct bcm2048_device *bdev = i2c_get_clientdata(client);
+	struct video_device *vd;
+
+	if (!client->adapter)
+		return -ENODEV;
+
+	if (bdev) {
+		vd = bdev->videodev;
+
+		bcm2048_sysfs_unregister_properties(bdev, ARRAY_SIZE(attrs));
+
+		if (vd)
+			video_unregister_device(vd);
+
+		if (bdev->power_state)
+			bcm2048_set_power_state(bdev, BCM2048_POWER_OFF);
+
+		if (client->irq > 0)
+			free_irq(client->irq, bdev);
+
+		cancel_work_sync(&bdev->work);
+
+		kfree(bdev);
+	}
+
+	i2c_set_clientdata(client, NULL);
+
+	return 0;
+}
+
+/*
+ *	bcm2048_i2c_driver - i2c driver interface
+ */
+static const struct i2c_device_id bcm2048_id[] = {
+	{ "bcm2048" , 0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(i2c, bcm2048_id);
+
+static struct i2c_driver bcm2048_i2c_driver = {
+	.driver		= {
+		.name	= BCM2048_DRIVER_NAME,
+	},
+	.probe		= bcm2048_i2c_driver_probe,
+	.remove		= __exit_p(bcm2048_i2c_driver_remove),
+	.id_table	= bcm2048_id,
+};
+
+/*
+ *	Module Interface
+ */
+static int __init bcm2048_module_init(void)
+{
+	pr_info(BCM2048_DRIVER_DESC "\n");
+
+	return i2c_add_driver(&bcm2048_i2c_driver);
+}
+module_init(bcm2048_module_init);
+
+static void __exit bcm2048_module_exit(void)
+{
+	i2c_del_driver(&bcm2048_i2c_driver);
+}
+module_exit(bcm2048_module_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR(BCM2048_DRIVER_AUTHOR);
+MODULE_DESCRIPTION(BCM2048_DRIVER_DESC);
+MODULE_VERSION("0.0.2");
diff --git a/include/media/radio-bcm2048.h b/include/media/radio-bcm2048.h
new file mode 100644
index 0000000..61f52aa
--- /dev/null
+++ b/include/media/radio-bcm2048.h
@@ -0,0 +1,30 @@ 
+/*
+ * drivers/media/radio/radio-bcm2048.h
+ *
+ * Property and command definitions for bcm2048 radio receiver chip.
+ *
+ * Copyright (C) Nokia Corporation
+ * Contact: Eero Nurkkala <ext-eero.nurkkala@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#ifndef BCM2048_H
+#define BCM2048_H
+
+#define BCM2048_NAME		"bcm2048"
+#define BCM2048_I2C_ADDR	0x22
+
+#endif	/* ifndef BCM2048_H */