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Commit 59da522a authored by Manjunatha Halli's avatar Manjunatha Halli Committed by Mauro Carvalho Chehab
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[media] drivers:media:radio: wl128x: FM driver RX sources 



This has implementation for FM RX functionality.
It communicates with FM V4l2 module and FM common module

Signed-off-by: default avatarManjunatha Halli <manjunatha_halli@ti.com>
Reviewed-by: default avatarHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent e8454ff7

drivers/media/radio/wl128x/fmdrv_rx.c

0 → 100644
+847 −0
Original line number Diff line number Diff line 
/*

 *  FM Driver for Connectivity chip of Texas Instruments.

 *  This sub-module of FM driver implements FM RX functionality.

 *

 *  Copyright (C) 2011 Texas Instruments

 *  Author: Raja Mani <raja_mani@ti.com>

 *  Author: Manjunatha Halli <manjunatha_halli@ti.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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 */



#include "fmdrv.h"

#include "fmdrv_common.h"

#include "fmdrv_rx.h"



void fm_rx_reset_rds_cache(struct fmdev *fmdev)

{

	fmdev->rx.rds.flag = FM_RDS_DISABLE;

	fmdev->rx.rds.last_blk_idx = 0;

	fmdev->rx.rds.wr_idx = 0;

	fmdev->rx.rds.rd_idx = 0;



	if (fmdev->rx.af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON)

		fmdev->irq_info.mask |= FM_LEV_EVENT;

}



void fm_rx_reset_station_info(struct fmdev *fmdev)

{

	fmdev->rx.stat_info.picode = FM_NO_PI_CODE;

	fmdev->rx.stat_info.afcache_size = 0;

	fmdev->rx.stat_info.af_list_max = 0;

}



u32 fm_rx_set_freq(struct fmdev *fmdev, u32 freq)

{

	unsigned long timeleft;

	u16 payload, curr_frq, intr_flag;

	u32 curr_frq_in_khz;

	u32 ret, resp_len;



	if (freq < fmdev->rx.region.bot_freq || freq > fmdev->rx.region.top_freq) {

		fmerr("Invalid frequency %d\n", freq);

		return -EINVAL;

	}



	/* Set audio enable */

	payload = FM_RX_AUDIO_ENABLE_I2S_AND_ANALOG;



	ret = fmc_send_cmd(fmdev, AUDIO_ENABLE_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	/* Set hilo to automatic selection */

	payload = FM_RX_IFFREQ_HILO_AUTOMATIC;

	ret = fmc_send_cmd(fmdev, HILO_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	/* Calculate frequency index and set*/

	payload = (freq - fmdev->rx.region.bot_freq) / FM_FREQ_MUL;



	ret = fmc_send_cmd(fmdev, FREQ_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	/* Read flags - just to clear any pending interrupts if we had */

	ret = fmc_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, 2, NULL, NULL);

	if (ret < 0)

		return ret;



	/* Enable FR, BL interrupts */

	intr_flag = fmdev->irq_info.mask;

	fmdev->irq_info.mask = (FM_FR_EVENT | FM_BL_EVENT);

	payload = fmdev->irq_info.mask;

	ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	/* Start tune */

	payload = FM_TUNER_PRESET_MODE;

	ret = fmc_send_cmd(fmdev, TUNER_MODE_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		goto exit;



	/* Wait for tune ended interrupt */

	init_completion(&fmdev->maintask_comp);

	timeleft = wait_for_completion_timeout(&fmdev->maintask_comp,

			FM_DRV_TX_TIMEOUT);

	if (!timeleft) {

		fmerr("Timeout(%d sec),didn't get tune ended int\n",

			   jiffies_to_msecs(FM_DRV_TX_TIMEOUT) / 1000);

		ret = -ETIMEDOUT;

		goto exit;

	}



	/* Read freq back to confirm */

	ret = fmc_send_cmd(fmdev, FREQ_SET, REG_RD, NULL, 2, &curr_frq, &resp_len);

	if (ret < 0)

		goto exit;



	curr_frq = be16_to_cpu(curr_frq);

	curr_frq_in_khz = (fmdev->rx.region.bot_freq + ((u32)curr_frq * FM_FREQ_MUL));



	if (curr_frq_in_khz != freq) {

		pr_info("Frequency is set to (%d) but "

			   "requested freq is (%d)\n", curr_frq_in_khz, freq);

	}



	/* Update local cache  */

	fmdev->rx.freq = curr_frq_in_khz;

exit:

	/* Re-enable default FM interrupts */

	fmdev->irq_info.mask = intr_flag;

	payload = fmdev->irq_info.mask;

	ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	/* Reset RDS cache and current station pointers */

	fm_rx_reset_rds_cache(fmdev);

	fm_rx_reset_station_info(fmdev);



	return ret;

}



static u32 fm_rx_set_channel_spacing(struct fmdev *fmdev, u32 spacing)

{

	u16 payload;

	u32 ret;



	if (spacing > 0 && spacing <= 50000)

		spacing = FM_CHANNEL_SPACING_50KHZ;

	else if (spacing > 50000 && spacing <= 100000)

		spacing = FM_CHANNEL_SPACING_100KHZ;

	else

		spacing = FM_CHANNEL_SPACING_200KHZ;



	/* set channel spacing */

	payload = spacing;

	ret = fmc_send_cmd(fmdev, CHANL_BW_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	fmdev->rx.region.chanl_space = spacing * FM_FREQ_MUL;



	return ret;

}



u32 fm_rx_seek(struct fmdev *fmdev, u32 seek_upward,

		u32 wrap_around, u32 spacing)

{

	u32 resp_len;

	u16 curr_frq, next_frq, last_frq;

	u16 payload, int_reason, intr_flag;

	u16 offset, space_idx;

	unsigned long timeleft;

	u32 ret;



	/* Set channel spacing */

	ret = fm_rx_set_channel_spacing(fmdev, spacing);

	if (ret < 0) {

		fmerr("Failed to set channel spacing\n");

		return ret;

	}



	/* Read the current frequency from chip */

	ret = fmc_send_cmd(fmdev, FREQ_SET, REG_RD, NULL,

			sizeof(curr_frq), &curr_frq, &resp_len);

	if (ret < 0)

		return ret;



	curr_frq = be16_to_cpu(curr_frq);

	last_frq = (fmdev->rx.region.top_freq - fmdev->rx.region.bot_freq) / FM_FREQ_MUL;



	/* Check the offset in order to be aligned to the channel spacing*/

	space_idx = fmdev->rx.region.chanl_space / FM_FREQ_MUL;

	offset = curr_frq % space_idx;



	next_frq = seek_upward ? curr_frq + space_idx /* Seek Up */ :

				curr_frq - space_idx /* Seek Down */ ;



	/*

	 * Add or subtract offset in order to stay aligned to the channel

	 * spacing.

	 */

	if ((short)next_frq < 0)

		next_frq = last_frq - offset;

	else if (next_frq > last_frq)

		next_frq = 0 + offset;



again:

	/* Set calculated next frequency to perform seek */

	payload = next_frq;

	ret = fmc_send_cmd(fmdev, FREQ_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	/* Set search direction (0:Seek Down, 1:Seek Up) */

	payload = (seek_upward ? FM_SEARCH_DIRECTION_UP : FM_SEARCH_DIRECTION_DOWN);

	ret = fmc_send_cmd(fmdev, SEARCH_DIR_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	/* Read flags - just to clear any pending interrupts if we had */

	ret = fmc_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, 2, NULL, NULL);

	if (ret < 0)

		return ret;



	/* Enable FR, BL interrupts */

	intr_flag = fmdev->irq_info.mask;

	fmdev->irq_info.mask = (FM_FR_EVENT | FM_BL_EVENT);

	payload = fmdev->irq_info.mask;

	ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	/* Start seek */

	payload = FM_TUNER_AUTONOMOUS_SEARCH_MODE;

	ret = fmc_send_cmd(fmdev, TUNER_MODE_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	/* Wait for tune ended/band limit reached interrupt */

	init_completion(&fmdev->maintask_comp);

	timeleft = wait_for_completion_timeout(&fmdev->maintask_comp,

			FM_DRV_RX_SEEK_TIMEOUT);

	if (!timeleft) {

		fmerr("Timeout(%d sec),didn't get tune ended int\n",

			   jiffies_to_msecs(FM_DRV_RX_SEEK_TIMEOUT) / 1000);

		return -ETIMEDOUT;

	}



	int_reason = fmdev->irq_info.flag & (FM_TUNE_COMPLETE | FM_BAND_LIMIT);



	/* Re-enable default FM interrupts */

	fmdev->irq_info.mask = intr_flag;

	payload = fmdev->irq_info.mask;

	ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	if (int_reason & FM_BL_EVENT) {

		if (wrap_around == 0) {

			fmdev->rx.freq = seek_upward ?

				fmdev->rx.region.top_freq :

				fmdev->rx.region.bot_freq;

		} else {

			fmdev->rx.freq = seek_upward ?

				fmdev->rx.region.bot_freq :

				fmdev->rx.region.top_freq;

			/* Calculate frequency index to write */

			next_frq = (fmdev->rx.freq -

					fmdev->rx.region.bot_freq) / FM_FREQ_MUL;

			goto again;

		}

	} else {

		/* Read freq to know where operation tune operation stopped */

		ret = fmc_send_cmd(fmdev, FREQ_SET, REG_RD, NULL, 2,

				&curr_frq, &resp_len);

		if (ret < 0)

			return ret;



		curr_frq = be16_to_cpu(curr_frq);

		fmdev->rx.freq = (fmdev->rx.region.bot_freq +

				((u32)curr_frq * FM_FREQ_MUL));



	}

	/* Reset RDS cache and current station pointers */

	fm_rx_reset_rds_cache(fmdev);

	fm_rx_reset_station_info(fmdev);



	return ret;

}



u32 fm_rx_set_volume(struct fmdev *fmdev, u16 vol_to_set)

{

	u16 payload;

	u32 ret;



	if (fmdev->curr_fmmode != FM_MODE_RX)

		return -EPERM;



	if (vol_to_set < FM_RX_VOLUME_MIN || vol_to_set > FM_RX_VOLUME_MAX) {

		fmerr("Volume is not within(%d-%d) range\n",

			   FM_RX_VOLUME_MIN, FM_RX_VOLUME_MAX);

		return -EINVAL;

	}

	vol_to_set *= FM_RX_VOLUME_GAIN_STEP;



	payload = vol_to_set;

	ret = fmc_send_cmd(fmdev, VOLUME_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	fmdev->rx.volume = vol_to_set;

	return ret;

}



/* Get volume */

u32 fm_rx_get_volume(struct fmdev *fmdev, u16 *curr_vol)

{

	if (fmdev->curr_fmmode != FM_MODE_RX)

		return -EPERM;



	if (curr_vol == NULL) {

		fmerr("Invalid memory\n");

		return -ENOMEM;

	}



	*curr_vol = fmdev->rx.volume / FM_RX_VOLUME_GAIN_STEP;



	return 0;

}



/* To get current band's bottom and top frequency */

u32 fm_rx_get_band_freq_range(struct fmdev *fmdev, u32 *bot_freq, u32 *top_freq)

{

	if (bot_freq != NULL)

		*bot_freq = fmdev->rx.region.bot_freq;



	if (top_freq != NULL)

		*top_freq = fmdev->rx.region.top_freq;



	return 0;

}



/* Returns current band index (0-Europe/US; 1-Japan) */

void fm_rx_get_region(struct fmdev *fmdev, u8 *region)

{

	*region = fmdev->rx.region.fm_band;

}



/* Sets band (0-Europe/US; 1-Japan) */

u32 fm_rx_set_region(struct fmdev *fmdev, u8 region_to_set)

{

	u16 payload;

	u32 new_frq = 0;

	u32 ret;



	if (region_to_set != FM_BAND_EUROPE_US &&

	    region_to_set != FM_BAND_JAPAN) {

		fmerr("Invalid band\n");

		return -EINVAL;

	}



	if (fmdev->rx.region.fm_band == region_to_set) {

		fmerr("Requested band is already configured\n");

		return 0;

	}



	/* Send cmd to set the band  */

	payload = (u16)region_to_set;

	ret = fmc_send_cmd(fmdev, BAND_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	fmc_update_region_info(fmdev, region_to_set);



	/* Check whether current RX frequency is within band boundary */

	if (fmdev->rx.freq < fmdev->rx.region.bot_freq)

		new_frq = fmdev->rx.region.bot_freq;

	else if (fmdev->rx.freq > fmdev->rx.region.top_freq)

		new_frq = fmdev->rx.region.top_freq;



	if (new_frq) {

		fmdbg("Current freq is not within band limit boundary,"

				"switching to %d KHz\n", new_frq);

		 /* Current RX frequency is not in range. So, update it */

		ret = fm_rx_set_freq(fmdev, new_frq);

	}



	return ret;

}



/* Reads current mute mode (Mute Off/On/Attenuate)*/

u32 fm_rx_get_mute_mode(struct fmdev *fmdev, u8 *curr_mute_mode)

{

	if (fmdev->curr_fmmode != FM_MODE_RX)

		return -EPERM;



	if (curr_mute_mode == NULL) {

		fmerr("Invalid memory\n");

		return -ENOMEM;

	}



	*curr_mute_mode = fmdev->rx.mute_mode;



	return 0;

}



static u32 fm_config_rx_mute_reg(struct fmdev *fmdev)

{

	u16 payload, muteval;

	u32 ret;



	muteval = 0;

	switch (fmdev->rx.mute_mode) {

	case FM_MUTE_ON:

		muteval = FM_RX_AC_MUTE_MODE;

		break;



	case FM_MUTE_OFF:

		muteval = FM_RX_UNMUTE_MODE;

		break;



	case FM_MUTE_ATTENUATE:

		muteval = FM_RX_SOFT_MUTE_FORCE_MODE;

		break;

	}

	if (fmdev->rx.rf_depend_mute == FM_RX_RF_DEPENDENT_MUTE_ON)

		muteval |= FM_RX_RF_DEP_MODE;

	else

		muteval &= ~FM_RX_RF_DEP_MODE;



	payload = muteval;

	ret = fmc_send_cmd(fmdev, MUTE_STATUS_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	return 0;

}



/* Configures mute mode (Mute Off/On/Attenuate) */

u32 fm_rx_set_mute_mode(struct fmdev *fmdev, u8 mute_mode_toset)

{

	u8 org_state;

	u32 ret;



	if (fmdev->rx.mute_mode == mute_mode_toset)

		return 0;



	org_state = fmdev->rx.mute_mode;

	fmdev->rx.mute_mode = mute_mode_toset;



	ret = fm_config_rx_mute_reg(fmdev);

	if (ret < 0) {

		fmdev->rx.mute_mode = org_state;

		return ret;

	}



	return 0;

}



/* Gets RF dependent soft mute mode enable/disable status */

u32 fm_rx_get_rfdepend_softmute(struct fmdev *fmdev, u8 *curr_mute_mode)

{

	if (fmdev->curr_fmmode != FM_MODE_RX)

		return -EPERM;



	if (curr_mute_mode == NULL) {

		fmerr("Invalid memory\n");

		return -ENOMEM;

	}



	*curr_mute_mode = fmdev->rx.rf_depend_mute;



	return 0;

}



/* Sets RF dependent soft mute mode */

u32 fm_rx_set_rfdepend_softmute(struct fmdev *fmdev, u8 rfdepend_mute)

{

	u8 org_state;

	u32 ret;



	if (fmdev->curr_fmmode != FM_MODE_RX)

		return -EPERM;



	if (rfdepend_mute != FM_RX_RF_DEPENDENT_MUTE_ON &&

	    rfdepend_mute != FM_RX_RF_DEPENDENT_MUTE_OFF) {

		fmerr("Invalid RF dependent soft mute\n");

		return -EINVAL;

	}

	if (fmdev->rx.rf_depend_mute == rfdepend_mute)

		return 0;



	org_state = fmdev->rx.rf_depend_mute;

	fmdev->rx.rf_depend_mute = rfdepend_mute;



	ret = fm_config_rx_mute_reg(fmdev);

	if (ret < 0) {

		fmdev->rx.rf_depend_mute = org_state;

		return ret;

	}



	return 0;

}



/* Returns the signal strength level of current channel */

u32 fm_rx_get_rssi_level(struct fmdev *fmdev, u16 *rssilvl)

{

	u16 curr_rssi_lel;

	u32 resp_len;

	u32 ret;



	if (rssilvl == NULL) {

		fmerr("Invalid memory\n");

		return -ENOMEM;

	}

	/* Read current RSSI level */

	ret = fmc_send_cmd(fmdev, RSSI_LVL_GET, REG_RD, NULL, 2,

			&curr_rssi_lel, &resp_len);

	if (ret < 0)

		return ret;



	*rssilvl = be16_to_cpu(curr_rssi_lel);



	return 0;

}



/*

 * Sets the signal strength level that once reached

 * will stop the auto search process

 */

u32 fm_rx_set_rssi_threshold(struct fmdev *fmdev, short rssi_lvl_toset)

{

	u16 payload;

	u32 ret;



	if (rssi_lvl_toset < FM_RX_RSSI_THRESHOLD_MIN ||

			rssi_lvl_toset > FM_RX_RSSI_THRESHOLD_MAX) {

		fmerr("Invalid RSSI threshold level\n");

		return -EINVAL;

	}

	payload = (u16)rssi_lvl_toset;

	ret = fmc_send_cmd(fmdev, SEARCH_LVL_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	fmdev->rx.rssi_threshold = rssi_lvl_toset;



	return 0;

}



/* Returns current RX RSSI threshold value */

u32 fm_rx_get_rssi_threshold(struct fmdev *fmdev, short *curr_rssi_lvl)

{

	if (fmdev->curr_fmmode != FM_MODE_RX)

		return -EPERM;



	if (curr_rssi_lvl == NULL) {

		fmerr("Invalid memory\n");

		return -ENOMEM;

	}



	*curr_rssi_lvl = fmdev->rx.rssi_threshold;



	return 0;

}



/* Sets RX stereo/mono modes */

u32 fm_rx_set_stereo_mono(struct fmdev *fmdev, u16 mode)

{

	u16 payload;

	u32 ret;



	if (mode != FM_STEREO_MODE && mode != FM_MONO_MODE) {

		fmerr("Invalid mode\n");

		return -EINVAL;

	}



	/* Set stereo/mono mode */

	payload = (u16)mode;

	ret = fmc_send_cmd(fmdev, MOST_MODE_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	/* Set stereo blending mode */

	payload = FM_STEREO_SOFT_BLEND;

	ret = fmc_send_cmd(fmdev, MOST_BLEND_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	return 0;

}



/* Gets current RX stereo/mono mode */

u32 fm_rx_get_stereo_mono(struct fmdev *fmdev, u16 *mode)

{

	u16 curr_mode;

	u32 ret, resp_len;



	if (mode == NULL) {

		fmerr("Invalid memory\n");

		return -ENOMEM;

	}



	ret = fmc_send_cmd(fmdev, MOST_MODE_SET, REG_RD, NULL, 2,

			&curr_mode, &resp_len);

	if (ret < 0)

		return ret;



	*mode = be16_to_cpu(curr_mode);



	return 0;

}



/* Choose RX de-emphasis filter mode (50us/75us) */

u32 fm_rx_set_deemphasis_mode(struct fmdev *fmdev, u16 mode)

{

	u16 payload;

	u32 ret;



	if (fmdev->curr_fmmode != FM_MODE_RX)

		return -EPERM;



	if (mode != FM_RX_EMPHASIS_FILTER_50_USEC &&

			mode != FM_RX_EMPHASIS_FILTER_75_USEC) {

		fmerr("Invalid rx de-emphasis mode (%d)\n", mode);

		return -EINVAL;

	}



	payload = mode;

	ret = fmc_send_cmd(fmdev, DEMPH_MODE_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	fmdev->rx.deemphasis_mode = mode;



	return 0;

}



/* Gets current RX de-emphasis filter mode */

u32 fm_rx_get_deemph_mode(struct fmdev *fmdev, u16 *curr_deemphasis_mode)

{

	if (fmdev->curr_fmmode != FM_MODE_RX)

		return -EPERM;



	if (curr_deemphasis_mode == NULL) {

		fmerr("Invalid memory\n");

		return -ENOMEM;

	}



	*curr_deemphasis_mode = fmdev->rx.deemphasis_mode;



	return 0;

}



/* Enable/Disable RX RDS */

u32 fm_rx_set_rds_mode(struct fmdev *fmdev, u8 rds_en_dis)

{

	u16 payload;

	u32 ret;



	if (rds_en_dis != FM_RDS_ENABLE && rds_en_dis != FM_RDS_DISABLE) {

		fmerr("Invalid rds option\n");

		return -EINVAL;

	}



	if (rds_en_dis == FM_RDS_ENABLE

	    && fmdev->rx.rds.flag == FM_RDS_DISABLE) {

		/* Turn on RX RDS and RDS circuit */

		payload = FM_RX_PWR_SET_FM_AND_RDS_BLK_ON;

		ret = fmc_send_cmd(fmdev, POWER_SET, REG_WR, &payload,

				sizeof(payload), NULL, NULL);

		if (ret < 0)

			return ret;



		/* Clear and reset RDS FIFO */

		payload = FM_RX_RDS_FLUSH_FIFO;

		ret = fmc_send_cmd(fmdev, RDS_CNTRL_SET, REG_WR, &payload,

		sizeof(payload), NULL, NULL);

		if (ret < 0)

			return ret;



		/* Read flags - just to clear any pending interrupts. */

		ret = fmc_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, 2,

				NULL, NULL);

		if (ret < 0)

			return ret;



		/* Set RDS FIFO threshold value */

		payload = FM_RX_RDS_FIFO_THRESHOLD;

		ret = fmc_send_cmd(fmdev, RDS_MEM_SET, REG_WR, &payload,

		sizeof(payload), NULL, NULL);

		if (ret < 0)

			return ret;



		/* Enable RDS interrupt */

		fmdev->irq_info.mask |= FM_RDS_EVENT;

		payload = fmdev->irq_info.mask;

		ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,

				sizeof(payload), NULL, NULL);

		if (ret < 0) {

			fmdev->irq_info.mask &= ~FM_RDS_EVENT;

			return ret;

		}



		/* Update our local flag */

		fmdev->rx.rds.flag = FM_RDS_ENABLE;

	} else if (rds_en_dis == FM_RDS_DISABLE

		   && fmdev->rx.rds.flag == FM_RDS_ENABLE) {

		/* Turn off RX RDS */

		payload = FM_RX_PWR_SET_FM_ON_RDS_OFF;

		ret = fmc_send_cmd(fmdev, POWER_SET, REG_WR, &payload,

				sizeof(payload), NULL, NULL);

		if (ret < 0)

			return ret;



		/* Reset RDS pointers */

		fmdev->rx.rds.last_blk_idx = 0;

		fmdev->rx.rds.wr_idx = 0;

		fmdev->rx.rds.rd_idx = 0;

		fm_rx_reset_station_info(fmdev);



		/* Update RDS local cache */

		fmdev->irq_info.mask &= ~(FM_RDS_EVENT);

		fmdev->rx.rds.flag = FM_RDS_DISABLE;

	}



	return 0;

}



/* Returns current RX RDS enable/disable status */

u32 fm_rx_get_rds_mode(struct fmdev *fmdev, u8 *curr_rds_en_dis)

{

	if (fmdev->curr_fmmode != FM_MODE_RX)

		return -EPERM;



	if (curr_rds_en_dis == NULL) {

		fmerr("Invalid memory\n");

		return -ENOMEM;

	}



	*curr_rds_en_dis = fmdev->rx.rds.flag;



	return 0;

}



/* Sets RDS operation mode (RDS/RDBS) */

u32 fm_rx_set_rds_system(struct fmdev *fmdev, u8 rds_mode)

{

	u16 payload;

	u32 ret;



	if (fmdev->curr_fmmode != FM_MODE_RX)

		return -EPERM;



	if (rds_mode != FM_RDS_SYSTEM_RDS && rds_mode != FM_RDS_SYSTEM_RBDS) {

		fmerr("Invalid rds mode\n");

		return -EINVAL;

	}

	/* Set RDS operation mode */

	payload = (u16)rds_mode;

	ret = fmc_send_cmd(fmdev, RDS_SYSTEM_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	fmdev->rx.rds_mode = rds_mode;



	return 0;

}



/* Returns current RDS operation mode */

u32 fm_rx_get_rds_system(struct fmdev *fmdev, u8 *rds_mode)

{

	if (fmdev->curr_fmmode != FM_MODE_RX)

		return -EPERM;



	if (rds_mode == NULL) {

		fmerr("Invalid memory\n");

		return -ENOMEM;

	}



	*rds_mode = fmdev->rx.rds_mode;



	return 0;

}



/* Configures Alternate Frequency switch mode */

u32 fm_rx_set_af_switch(struct fmdev *fmdev, u8 af_mode)

{

	u16 payload;

	u32 ret;



	if (fmdev->curr_fmmode != FM_MODE_RX)

		return -EPERM;



	if (af_mode != FM_RX_RDS_AF_SWITCH_MODE_ON &&

	    af_mode != FM_RX_RDS_AF_SWITCH_MODE_OFF) {

		fmerr("Invalid af mode\n");

		return -EINVAL;

	}

	/* Enable/disable low RSSI interrupt based on af_mode */

	if (af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON)

		fmdev->irq_info.mask |= FM_LEV_EVENT;

	else

		fmdev->irq_info.mask &= ~FM_LEV_EVENT;



	payload = fmdev->irq_info.mask;

	ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,

			sizeof(payload), NULL, NULL);

	if (ret < 0)

		return ret;



	fmdev->rx.af_mode = af_mode;



	return 0;

}



/* Returns Alternate Frequency switch status */

u32 fm_rx_get_af_switch(struct fmdev *fmdev, u8 *af_mode)

{

	if (fmdev->curr_fmmode != FM_MODE_RX)

		return -EPERM;



	if (af_mode == NULL) {

		fmerr("Invalid memory\n");

		return -ENOMEM;

	}



	*af_mode = fmdev->rx.af_mode;



	return 0;

}

drivers/media/radio/wl128x/fmdrv_rx.h

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Original line number Diff line number Diff line 
/*

 *  FM Driver for Connectivity chip of Texas Instruments.

 *  FM RX module header.

 *

 *  Copyright (C) 2011 Texas Instruments

 *

 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 */



#ifndef _FMDRV_RX_H

#define _FMDRV_RX_H



u32 fm_rx_set_freq(struct fmdev *, u32);

u32 fm_rx_set_mute_mode(struct fmdev *, u8);

u32 fm_rx_set_stereo_mono(struct fmdev *, u16);

u32 fm_rx_set_rds_mode(struct fmdev *, u8);

u32 fm_rx_set_rds_system(struct fmdev *, u8);

u32 fm_rx_set_volume(struct fmdev *, u16);

u32 fm_rx_set_rssi_threshold(struct fmdev *, short);

u32 fm_rx_set_region(struct fmdev *, u8);

u32 fm_rx_set_rfdepend_softmute(struct fmdev *, u8);

u32 fm_rx_set_deemphasis_mode(struct fmdev *, u16);

u32 fm_rx_set_af_switch(struct fmdev *, u8);



void fm_rx_reset_rds_cache(struct fmdev *);

void fm_rx_reset_station_info(struct fmdev *);



u32 fm_rx_seek(struct fmdev *, u32, u32, u32);



u32 fm_rx_get_rds_mode(struct fmdev *, u8 *);

u32 fm_rx_get_rds_system(struct fmdev *, u8 *);

u32 fm_rx_get_mute_mode(struct fmdev *, u8 *);

u32 fm_rx_get_volume(struct fmdev *, u16 *);

u32 fm_rx_get_band_freq_range(struct fmdev *,

					u32 *, u32 *);

u32 fm_rx_get_stereo_mono(struct fmdev *, u16 *);

u32 fm_rx_get_rssi_level(struct fmdev *, u16 *);

u32 fm_rx_get_rssi_threshold(struct fmdev *, short *);

u32 fm_rx_get_rfdepend_softmute(struct fmdev *, u8 *);

u32 fm_rx_get_deemph_mode(struct fmdev *, u16 *);

u32 fm_rx_get_af_switch(struct fmdev *, u8 *);

void fm_rx_get_region(struct fmdev *, u8 *);



u32 fm_rx_set_chanl_spacing(struct fmdev *, u8);

u32 fm_rx_get_chanl_spacing(struct fmdev *, u8 *);

#endif