radio: silabs: Add support for AF jump (0d6c86df) · Commits · e / devices / samsung / android_kernel_samsung_msm8916

drivers/media/radio/silabs/radio-silabs.c

+435 −22

Original line number	Diff line number	Diff line
		@@ -82,7 +82,7 @@ struct silabs_fm_device {
		/* regional settings */
		enum silabs_region_t region;
		/* power mode */
		int lp_mode;
		bool lp_mode;
		int handle_irq;
		/* global lock */
		struct mutex lock;
		@@ -91,10 +91,12 @@ struct silabs_fm_device {
		/* work queue */
		struct workqueue_struct *wqueue;
		struct workqueue_struct *wqueue_scan;
		struct workqueue_struct *wqueue_af;
		struct workqueue_struct *wqueue_rds;
		struct work_struct rds_worker;
		struct delayed_work work;
		struct delayed_work work_scan;
		struct delayed_work work_af;
		/* wait queue for blocking event read */
		wait_queue_head_t event_queue;
		/* wait queue for raw rds read */
		@@ -123,12 +125,17 @@ struct silabs_fm_device {
		u8 utf_8_flag;
		u8 rt_ert_flag;
		u8 formatting_dir;
		bool is_af_jump_enabled;
		bool is_af_tune_in_progress;
		u8 af_rssi_th; /* allowed rssi is 0-127 */
		struct silabs_af_info af_info;
		};

		static int silabs_fm_request_irq(struct silabs_fm_device *radio);
		static int tune(struct silabs_fm_device *radio, u32 freq);
		static int silabs_seek(struct silabs_fm_device *radio, int dir, int wrap);
		static int cancel_seek(struct silabs_fm_device *radio);
		static int configure_interrupts(struct silabs_fm_device *radio, u8 val);
		static void silabs_fm_q_event(struct silabs_fm_device *radio,
		enum silabs_evt_t event);

		@@ -1201,6 +1208,226 @@ static void silabs_raw_rds_handler(struct silabs_fm_device *radio)
		break;
		}
		}

		static int set_hard_mute(struct silabs_fm_device *radio, bool val)
		{
		int retval = 0;

		if (val == true) {
		retval = set_property(radio, RX_HARD_MUTE_PROP, HARD_MUTE_MASK);

		if (retval < 0)
		FMDERR("%s: set_hard_mute failed with error %d\n",
		__func__, retval);
		} else {
		retval = set_property(radio, RX_HARD_MUTE_PROP, 0);

		if (retval < 0)
		FMDERR("%s: set_hard_mute failed with error %d\n",
		__func__, retval);
		}

		return retval;
		}

		static int get_rssi(struct silabs_fm_device radio, u8 prssi)
		{
		int retval = 0;

		mutex_lock(&radio->lock);

		memset(radio->write_buf, 0, WRITE_REG_NUM);

		/* track command that is being sent to chip.*/
		radio->cmd = FM_RSQ_STATUS_CMD;
		radio->write_buf[0] = FM_RSQ_STATUS_CMD;
		radio->write_buf[1] = 1;

		retval = send_cmd(radio, RSQ_STATUS_CMD_LEN);

		if (retval < 0)
		FMDERR("%s: get_rsq_status failed with error %d\n",
		__func__, retval);

		FMDBG("%s: rssi is %d\n", __func__, radio->read_buf[4]);
		*prssi = radio->read_buf[4];
		mutex_unlock(&radio->lock);

		return retval;
		}

		static void reset_af_info(struct silabs_fm_device *radio)
		{
		radio->af_info.is_new_af_list = false;
		radio->af_info.cnt = 0;
		radio->af_info.index = 0;
		radio->af_info.size = 0;
		radio->af_info.orig_freq_khz = 0;
		memset(radio->af_info.af_list, 0, sizeof(radio->af_info.af_list));
		}

		static void update_af_list(struct silabs_fm_device *radio)
		{
		u8 first_byte, sec_byte;
		u16 af_data = radio->block[2];

		first_byte = af_data >> 8;
		sec_byte = af_data & 0xFF;

		if (first_byte >= MIN_AF_CNT_CODE && first_byte <= MAX_AF_CNT_CODE) {
		/* AF count. */
		reset_af_info(radio);

		radio->af_info.cnt = first_byte - NO_AF_CNT_CODE;

		radio->af_info.orig_freq_khz = radio->tuned_freq_khz;
		FMDBG("%s: current freq is %u, AF cnt is %u\n",
		__func__, radio->tuned_freq_khz, radio->af_info.cnt);

		radio->af_info.af_list[radio->af_info.size++] =
		SCALE_AF_CODE_TO_FREQ_KHZ(sec_byte);
		FMDBG("%s: AF is %u\n", __func__,
		SCALE_AF_CODE_TO_FREQ_KHZ(sec_byte));
		} else if (first_byte >= MIN_AF_FREQ_CODE &&
		first_byte <= MAX_AF_FREQ_CODE) {
		/* update the AF list */
		radio->af_info.af_list[radio->af_info.size++] =
		SCALE_AF_CODE_TO_FREQ_KHZ(first_byte);
		FMDBG("%s: first AF is %u\n", __func__,
		SCALE_AF_CODE_TO_FREQ_KHZ(first_byte));

		if (radio->af_info.size < radio->af_info.cnt) {
		radio->af_info.af_list[radio->af_info.size++] =
		SCALE_AF_CODE_TO_FREQ_KHZ(sec_byte);
		FMDBG("%s: second AF is %u\n", __func__,
		SCALE_AF_CODE_TO_FREQ_KHZ(sec_byte));
		}
		}
		}

		static void silabs_af_tune(struct work_struct *work)
		{
		struct silabs_fm_device *radio;
		int retval = 0;
		u8 rssi = 0;
		u32 freq = 0;

		radio = container_of(work, struct silabs_fm_device, work_af.work);

		if (radio->af_info.size == 0) {
		FMDBG("%s: Empty AF list\n", __func__);
		radio->is_af_tune_in_progress = false;
		return;
		}

		/* Disable all other interrupts except STC */
		retval = configure_interrupts(radio, ENABLE_STC_INTERRUPTS);

		/* Mute until AF tuning finishes */
		retval = set_hard_mute(radio, true);

		while (1) {
		if (radio->mode != FM_RECV) {
		FMDERR("%s: Drv is not in proper state\n", __func__);
		goto end;
		}

		if (radio->seek_tune_status != NO_SEEK_TUNE_PENDING) {
		FMDBG("%s: manual tune, search issued\n", __func__);
		break;
		}

		if (radio->is_af_jump_enabled != true) {
		FMDBG("%s: AF jump is disabled\n", __func__);
		break;
		}

		/* If no more AFs left, tune to original frequency and break */
		if (radio->af_info.index >= radio->af_info.size) {
		FMDBG("%s: No more AFs, tuning to original freq %u\n",
		__func__, radio->af_info.orig_freq_khz);

		freq = radio->af_info.orig_freq_khz;

		retval = tune(radio, freq);
		if (retval < 0) {
		FMDERR("%s: tune failed, error %d\n",
		__func__, retval);
		goto err_tune_fail;
		}

		/* wait for tune to finish */
		if (!wait_for_completion_timeout(&radio->sync_req_done,
		msecs_to_jiffies(WAIT_TIMEOUT_MSEC))) {
		FMDERR("%s: didn't receive STC for tune\n",
		__func__);
		/* FM is not correct state */
		continue;
		} else
		FMDBG("%s: received STC for tune\n", __func__);

		goto err_tune_fail;
		}

		freq = radio->af_info.af_list[radio->af_info.index++];

		FMDBG("%s: tuning to freq %u\n", __func__, freq);

		retval = tune(radio, freq);
		if (retval < 0) {
		FMDERR("%s: tune failed, error %d\n",
		__func__, retval);
		goto err_tune_fail;
		}

		/* wait for tune to finish */
		if (!wait_for_completion_timeout(&radio->sync_req_done,
		msecs_to_jiffies(WAIT_TIMEOUT_MSEC))) {
		FMDERR("%s: didn't receive STC for tune\n",
		__func__);
		/* FM is not correct state */
		continue;
		} else
		FMDBG("%s: received STC for tune\n", __func__);

		retval = get_rssi(radio, &rssi);
		if (retval < 0) {
		FMDERR("%s: getting rssi failed\n", __func__);
		goto err_tune_fail;
		}

		if (rssi >= radio->af_rssi_th) {
		FMDBG("%s: found AF freq(%u) >= AF threshold\n",
		__func__, freq);
		/* Notify FM UI about the new freq */
		FMDBG("%s: posting TUNE_SUCC event\n", __func__);
		silabs_fm_q_event(radio, SILABS_EVT_TUNE_SUCC);

		break;
		}
		}

		err_tune_fail:
		/*
		* At this point, we are tuned to either original freq or AF with >=
		* AF rssi threshold
		*/
		reset_af_info(radio);

		radio->is_af_tune_in_progress = false;

		/* Clear the stale RDS int bit. */
		get_rds_status(radio);
		retval = configure_interrupts(radio, ENABLE_STC_RDS_INTERRUPTS);

		/* Clear the stale RSQ int bit. */
		get_rssi(radio, &rssi);
		retval = configure_interrupts(radio, ENABLE_RSQ_INTERRUPTS);

		end:
		return;
		}

		/* When RDS interrupt is received, read and process RDS data. */
		static void rds_handler(struct work_struct *worker)
		{
		@@ -1232,6 +1459,7 @@ static void rds_handler(struct work_struct *worker)

		switch (grp_type) {
		case RDS_TYPE_0A:
		update_af_list(radio);
		/* fall through */
		case RDS_TYPE_0B:
		addr = (radio->block[1] & PS_MASK) * NO_OF_CHARS_IN_EACH_ADD;
		@@ -1290,15 +1518,16 @@ static int configure_interrupts(struct silabs_fm_device *radio, u8 val)
		prop_val = 0;
		retval = set_property(radio, GPO_IEN_PROP, prop_val);
		if (retval < 0)
		FMDERR("In %s, error disabling interrupts\n", __func__);
		FMDERR("%s: error disabling interrupts\n", __func__);
		break;
		case ENABLE_STC_RDS_INTERRUPTS:
		/* enable interrupts. */
		/* enable STC and RDS interrupts. */
		prop_val = RDS_INT_BIT_MASK \| STC_INT_BIT_MASK;

		retval = set_property(radio, GPO_IEN_PROP, prop_val);
		if (retval < 0)
		FMDERR("In %s, error enabling interrupts\n", __func__);
		FMDERR("%s: error enabling STC, RDS interrupts\n",
		__func__);
		break;
		case ENABLE_STC_INTERRUPTS:
		/* enable STC interrupts only. */
		@@ -1306,7 +1535,51 @@ static int configure_interrupts(struct silabs_fm_device *radio, u8 val)

		retval = set_property(radio, GPO_IEN_PROP, prop_val);
		if (retval < 0)
		FMDERR("In %s, error enabling interrupts\n", __func__);
		FMDERR("%s: error enabling STC interrupts\n", __func__);
		break;
		case ENABLE_RDS_INTERRUPTS:
		/* enable RDS interrupts. */
		prop_val = RDS_INT_BIT_MASK \| STC_INT_BIT_MASK;
		if (radio->is_af_jump_enabled)
		prop_val \|= RSQ_INT_BIT_MASK;

		retval = set_property(radio, GPO_IEN_PROP, prop_val);
		if (retval < 0)
		FMDERR("%s: error enabling RDS interrupts\n",
		__func__);
		break;
		case DISABLE_RDS_INTERRUPTS:
		/* disable RDS interrupts. */
		prop_val = STC_INT_BIT_MASK;
		if (radio->is_af_jump_enabled)
		prop_val \|= RSQ_INT_BIT_MASK;

		retval = set_property(radio, GPO_IEN_PROP, prop_val);
		if (retval < 0)
		FMDERR("%s: error disabling RDS interrupts\n",
		__func__);
		break;
		case ENABLE_RSQ_INTERRUPTS:
		/* enable RSQ interrupts. */
		prop_val = RSQ_INT_BIT_MASK \| STC_INT_BIT_MASK;
		if (radio->lp_mode != true)
		prop_val \|= RDS_INT_BIT_MASK;

		retval = set_property(radio, GPO_IEN_PROP, prop_val);
		if (retval < 0)
		FMDERR("%s: error enabling RSQ interrupts\n",
		__func__);
		break;
		case DISABLE_RSQ_INTERRUPTS:
		/* disable RSQ interrupts. */
		prop_val = STC_INT_BIT_MASK;
		if (radio->lp_mode != true)
		prop_val \|= RDS_INT_BIT_MASK;

		retval = set_property(radio, GPO_IEN_PROP, prop_val);
		if (retval < 0)
		FMDERR("%s: error disabling RSQ interrupts\n",
		__func__);
		break;
		default:
		FMDERR("%s: invalid value %u\n", __func__, val);
		@@ -1358,20 +1631,44 @@ static int initialize_recv(struct silabs_fm_device *radio)
		{
		int retval = 0;

		retval = set_property(radio, FM_SEEK_TUNE_SNR_THRESHOLD_PROP, 2);
		retval = set_property(radio,
		FM_SEEK_TUNE_SNR_THRESHOLD_PROP,
		DEFAULT_SNR_TH);
		if (retval < 0) {
		FMDERR("%s: FM_SEEK_TUNE_SNR_THRESHOLD_PROP fail error %d\n",
		__func__, retval);
		goto set_prop_fail;
		}

		retval = set_property(radio, FM_SEEK_TUNE_RSSI_THRESHOLD_PROP, 7);
		retval = set_property(radio,
		FM_SEEK_TUNE_RSSI_THRESHOLD_PROP,
		DEFAULT_RSSI_TH);
		if (retval < 0) {
		FMDERR("%s: FM_SEEK_TUNE_RSSI_THRESHOLD_PROP fail error %d\n",
		__func__, retval);
		goto set_prop_fail;
		}

		retval = set_property(radio,
		FM_RSQ_RSSI_LO_THRESHOLD_PROP,
		DEFAULT_AF_RSSI_LOW_TH);
		if (retval < 0) {
		FMDERR("%s: FM_RSQ_RSSI_LO_THRESHOLD_PROP fail error %d\n",
		__func__, retval);
		goto set_prop_fail;
		}

		radio->af_rssi_th = DEFAULT_AF_RSSI_LOW_TH;

		retval = set_property(radio,
		FM_RSQ_INT_SOURCE_PROP,
		RSSI_LOW_TH_INT_BIT_MASK);
		if (retval < 0) {
		FMDERR("%s: FM_RSQ_INT_SOURCE_PROP fail error %d\n",
		__func__, retval);
		goto set_prop_fail;
		}

		set_prop_fail:
		return retval;

		@@ -1630,9 +1927,33 @@ static void silabs_fm_q_event(struct silabs_fm_device *radio,
		wake_up_interruptible(&radio->event_queue);
		}

		static int clear_stc_int(struct silabs_fm_device *radio)
		{
		int retval = 0;

		mutex_lock(&radio->lock);

		memset(radio->write_buf, 0, WRITE_REG_NUM);

		/* track command that is being sent to chip. */
		radio->cmd = FM_TUNE_STATUS_CMD;

		radio->write_buf[0] = FM_TUNE_STATUS_CMD;
		radio->write_buf[1] = INTACK_MASK;

		retval = send_cmd(radio, TUNE_STATUS_CMD_LEN);
		if (retval < 0)
		FMDERR("%s: clear_stc_int fail, error %d\n", __func__, retval);

		mutex_unlock(&radio->lock);

		return retval;
		}

		static void silabs_interrupts_handler(struct silabs_fm_device *radio)
		{
		int retval = 0;
		u8 rssi = 0;

		if (unlikely(radio == NULL)) {
		FMDERR("%s:radio is null", __func__);
		@@ -1653,11 +1974,7 @@ static void silabs_interrupts_handler(struct silabs_fm_device *radio)
		FMDBG("%s: successfully read the resp from soc, status byte is %x\n",
		__func__, radio->read_buf[0]);

		if (radio->read_buf[0] & RDS_INT_BIT_MASK) {
		FMDBG("RDS interrupt received\n");
		schedule_work(&radio->rds_worker);
		return;
		}

		if (radio->read_buf[0] & STC_INT_BIT_MASK) {
		FMDBG("%s: STC bit set for cmd %x\n", __func__, radio->cmd);
		if (radio->seek_tune_status == TUNE_PENDING) {
		@@ -1682,8 +1999,53 @@ static void silabs_interrupts_handler(struct silabs_fm_device *radio)
		*/
		FMDBG("In %s, signalling scan thread\n", __func__);
		complete(&radio->sync_req_done);
		} else if (radio->is_af_tune_in_progress == true) {
		/*
		* when AF tune is going on and STC int is set, signal
		* so that AF tune can proceed.
		*/
		FMDBG("In %s, signalling AF tune thread\n", __func__);
		complete(&radio->sync_req_done);
		}
		/* clear the STC interrupt. */
		clear_stc_int(radio);
		reset_rds(radio); /* Clear the existing RDS data */
		return;
		}

		if (radio->read_buf[0] & RSQ_INT_BIT_MASK) {
		FMDBG("RSQ interrupt received, clearing the RSQ int bit\n");

		/* clear RSQ, RDS interrupt bits until AF tune is complete. */
		(void)get_rssi(radio, &rssi);
		(void)get_rds_status(radio);
		/* Don't process RSQ until AF tune is complete. */
		if (radio->is_af_tune_in_progress == true)
		return;

		if (radio->is_af_jump_enabled &&
		radio->af_info.size != 0 &&
		rssi <= radio->af_rssi_th) {

		radio->is_af_tune_in_progress = true;
		FMDBG("%s: Queuing to AF work Q, freq %u, rssi %u\n",
		__func__, radio->tuned_freq_khz, rssi);
		queue_delayed_work(radio->wqueue_af, &radio->work_af,
		msecs_to_jiffies(SILABS_DELAY_MSEC));
		}
		return;
		}

		if (radio->read_buf[0] & RDS_INT_BIT_MASK) {
		FMDBG("RDS interrupt received\n");
		/* Don't process RDS until AF tune is complete. */
		if (radio->is_af_tune_in_progress == true) {
		/* clear RDS int bit and return */
		get_rds_status(radio);
		return;
		}
		schedule_work(&radio->rds_worker);
		return;
		}
		return;
		}
		@@ -1710,6 +2072,8 @@ static void silabs_fm_disable_irq(struct silabs_fm_device *radio)
		flush_workqueue(radio->wqueue);
		cancel_delayed_work_sync(&radio->work_scan);
		flush_workqueue(radio->wqueue_scan);
		cancel_delayed_work_sync(&radio->work_af);
		flush_workqueue(radio->wqueue_af);
		}

		static irqreturn_t silabs_fm_isr(int irq, void *dev_id)
		@@ -1768,6 +2132,7 @@ static int silabs_fm_fops_open(struct file *file)

		INIT_DELAYED_WORK(&radio->work, read_int_stat);
		INIT_DELAYED_WORK(&radio->work_scan, silabs_scan);
		INIT_DELAYED_WORK(&radio->work_af, silabs_af_tune);
		INIT_WORK(&radio->rds_worker, rds_handler);

		init_completion(&radio->sync_req_done);
		@@ -2242,20 +2607,43 @@ static int silabs_fm_vidioc_s_ctrl(struct file file, void priv,
		case V4L2_CID_PRIVATE_SILABS_LP_MODE:
		FMDBG("In %s, V4L2_CID_PRIVATE_SILABS_LP_MODE, val is %d\n",
		__func__, ctrl->value);
		if (ctrl->value)
		if (ctrl->value) {
		/* disable RDS interrupts */
		retval = configure_interrupts(radio,
		ENABLE_STC_INTERRUPTS);
		else
		ENABLE_RDS_INTERRUPTS);
		radio->lp_mode = true;
		} else {
		/* enable RDS interrupts */
		retval = configure_interrupts(radio,
		ENABLE_STC_RDS_INTERRUPTS);
		DISABLE_RDS_INTERRUPTS);
		radio->lp_mode = false;
		}

		if (retval < 0) {
		FMDERR("In %s, setting low power mode failed %d\n",
		__func__, retval);
		goto end;
		}
		break;
		case V4L2_CID_PRIVATE_SILABS_AF_JUMP:
		FMDBG("%s: V4L2_CID_PRIVATE_SILABS_AF_JUMP, val is %d\n",
		__func__, ctrl->value);
		if (ctrl->value)
		/* enable RSQ interrupts */
		retval = configure_interrupts(radio,
		ENABLE_RSQ_INTERRUPTS);
		else
		/* disable RSQ interrupts */
		retval = configure_interrupts(radio,
		DISABLE_RSQ_INTERRUPTS);
		if (retval < 0) {
		FMDERR("%s: setting AF jump mode failed %d\n",
		__func__, retval);
		goto end;
		}
		/* Save the AF jump state */
		radio->is_af_jump_enabled = ctrl->value;
		break;
		default:
		retval = -EINVAL;
		break;
		@@ -2475,8 +2863,13 @@ static int silabs_fm_vidioc_s_frequency(struct file file, void priv,
		retval = tune(radio, f);

		/* save the current frequency if tune is successful. */
		if (retval > 0)
		if (retval > 0) {
		radio->tuned_freq_khz = f;
		/* Clear AF list */
		reset_af_info(radio);
		cancel_delayed_work_sync(&radio->work_af);
		flush_workqueue(radio->wqueue_af);
		}

		return retval;
		}
		@@ -2511,7 +2904,7 @@ static int silabs_fm_vidioc_s_hw_freq_seek(struct file file, void priv,

		radio->seek_tune_status = SEEK_PENDING;

		return silabs_seek(radio, dir, WRAP_ENABLE);
		retval = silabs_seek(radio, dir, WRAP_ENABLE);

		} else if (radio->g_search_mode == 1) {
		/* scan */
		@@ -2525,6 +2918,13 @@ static int silabs_fm_vidioc_s_hw_freq_seek(struct file file, void priv,
		__func__, radio->g_search_mode);
		}

		if (retval > 0) {
		/* Clear AF list */
		reset_af_info(radio);
		cancel_delayed_work_sync(&radio->work_af);
		flush_workqueue(radio->wqueue_af);
		}

		return retval;
		}

		@@ -2839,6 +3239,7 @@ static int silabs_fm_probe(struct i2c_client *client,

		radio->wqueue = NULL;
		radio->wqueue_scan = NULL;
		radio->wqueue_af = NULL;
		radio->wqueue_rds = NULL;

		/* video device allocation */
		@@ -2875,8 +3276,8 @@ static int silabs_fm_probe(struct i2c_client *client,
		/* initializing the device count */
		atomic_set(&radio->users, 1);

		/* radio initializes to low power mode */
		radio->lp_mode = 1;
		/* radio initializes to normal mode */
		radio->lp_mode = 0;
		radio->handle_irq = 1;
		/* init lock */
		mutex_init(&radio->lock);
		@@ -2908,6 +3309,15 @@ static int silabs_fm_probe(struct i2c_client *client,
		retval = -ENOMEM;
		goto err_wqueue_scan;
		}

		FMDBG("%s: creating work q for af\n", __func__);
		radio->wqueue_af = create_singlethread_workqueue("sifmradioaf");

		if (!radio->wqueue_af) {
		retval = -ENOMEM;
		goto err_wqueue_af;
		}

		radio->wqueue_rds = create_singlethread_workqueue("sifmradiords");

		if (!radio->wqueue_rds) {
		@@ -2928,6 +3338,8 @@ static int silabs_fm_probe(struct i2c_client *client,
		err_all:
		destroy_workqueue(radio->wqueue_rds);
		err_wqueue_rds:
		destroy_workqueue(radio->wqueue_af);
		err_wqueue_af:
		destroy_workqueue(radio->wqueue_scan);
		err_wqueue_scan:
		destroy_workqueue(radio->wqueue);
		@@ -2972,6 +3384,7 @@ static int silabs_fm_remove(struct i2c_client *client)
		/* disable irq */
		destroy_workqueue(radio->wqueue);
		destroy_workqueue(radio->wqueue_scan);
		destroy_workqueue(radio->wqueue_af);
		destroy_workqueue(radio->wqueue_rds);

		video_unregister_device(radio->videodev);

drivers/media/radio/silabs/radio-silabs.h

+47 −3

Original line number	Diff line number	Diff line
		@@ -95,6 +95,25 @@ const unsigned char MAX_SRCH_MODE = 0x01;
		#define PTY_MASK 0x1F
		#define NO_OF_CHARS_IN_EACH_ADD 2

		#define MIN_SNR 0
		#define MAX_SNR 127
		#define MIN_RSSI 0
		#define MAX_RSSI 127
		#define DEFAULT_SNR_TH 2
		#define DEFAULT_RSSI_TH 7

		#define DEFAULT_AF_RSSI_LOW_TH 25
		#define MAX_NO_OF_AF 25
		#define MIN_AF_FREQ_CODE 1
		#define MAX_AF_FREQ_CODE 204
		/* 25 AFs supported for a freq. 224 means 1 AF. 225 means 2 AFs and so on */
		#define NO_AF_CNT_CODE 224
		#define MIN_AF_CNT_CODE 225
		#define MAX_AF_CNT_CODE 249
		/* freqs are divided by 10. */
		#define SCALE_AF_CODE_TO_FREQ_KHZ(x) (87500 + (x*100))


		/* commands */
		#define POWER_UP_CMD 0x01
		#define GET_REV_CMD 0x10
		@@ -123,7 +142,8 @@ const unsigned char MAX_SRCH_MODE = 0x01;
		#define FM_DEEMPHASIS_PROP 0x1100
		#define FM_CHANNEL_FILTER_PROP 0x1102
		#define FM_ANTENNA_INPUT_PROP 0x1107

		#define FM_RSQ_INT_SOURCE_PROP 0x1200
		#define FM_RSQ_RSSI_LO_THRESHOLD_PROP 0x1204

		#define FM_SEEK_BAND_BOTTOM_PROP 0x1400
		#define FM_SEEK_BAND_TOP_PROP 0x1401
		@@ -135,6 +155,7 @@ const unsigned char MAX_SRCH_MODE = 0x01;
		#define FM_RDS_INT_FIFO_COUNT_PROP 0x1501
		#define FM_RDS_CONFIG_PROP 0x1502

		#define RX_HARD_MUTE_PROP 0x4001

		/* BIT MASKS */
		#define ENABLE_CTS_INT_MASK (1 << 7)
		@@ -155,7 +176,10 @@ const unsigned char MAX_SRCH_MODE = 0x01;
		#define RSQ_INT_BIT_MASK (1 << 3)
		#define RDS_INT_BIT_MASK (1 << 2)
		#define STC_INT_BIT_MASK 1

		#define RSSI_LOW_TH_INT_BIT_MASK 1
		#define RDS_INT_DISABLE_MASK 0x9
		#define RSQ_INT_DISABLE_MASK 0x5
		#define HARD_MUTE_MASK 0x3

		#define DCLK_FALLING_EDGE_MASK (1 << 7)

		@@ -168,6 +192,7 @@ const unsigned char MAX_SRCH_MODE = 0x01;
		#define TUNE_FREQ_CMD_LEN 5
		#define SEEK_CMD_LEN 2
		#define TUNE_STATUS_CMD_LEN 2
		#define RSQ_STATUS_CMD_LEN 2

		#define HIGH_BYTE_16BIT(x) (x >> 8)
		#define LOW_BYTE_16BIT(x) (x & 0xFF)
		@@ -379,7 +404,11 @@ enum silabs_region_t {
		enum silabs_interrupts_t {
		DISABLE_ALL_INTERRUPTS,
		ENABLE_STC_RDS_INTERRUPTS,
		ENABLE_STC_INTERRUPTS
		ENABLE_STC_INTERRUPTS,
		ENABLE_RDS_INTERRUPTS,
		DISABLE_RDS_INTERRUPTS,
		ENABLE_RSQ_INTERRUPTS,
		DISABLE_RSQ_INTERRUPTS
		};

		struct silabs_fm_recv_conf_req {
		@@ -390,6 +419,21 @@ struct silabs_fm_recv_conf_req {
		__u16 band_high_limit;
		};

		struct silabs_af_info {
		/* Flag to identify repeated AF list */
		bool is_new_af_list;
		/* no. of AFs in the list. */
		u8 cnt;
		/* actual size of the list */
		u8 size;
		/* index of currently tuned station in the AF list. */
		u8 index;
		/* freq to which AF list belongs to. */
		u32 orig_freq_khz;
		/* AF list */
		u32 af_list[MAX_NO_OF_AF];
		};

		static inline bool is_valid_chan_spacing(int spacing)
		{
		if ((spacing == 0) \|\|