--- /dev/null
+/*
+ * drivers/staging/media/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 <linux/slab.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include "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, ®ion_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");
projects / linux-beck.git / commitdiff