- 根目录:
- drivers
- media
- radio
- wl128x
- fmdrv_rx.c
/*
* 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;
}
int fm_rx_set_freq(struct fmdev *fmdev, u32 freq)
{
unsigned long timeleft;
u16 payload, curr_frq, intr_flag;
u32 curr_frq_in_khz;
u32 resp_len;
int ret;
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((__force __be16)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 int fm_rx_set_channel_spacing(struct fmdev *fmdev, u32 spacing)
{
u16 payload;
int 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;
}
int 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;
int 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((__force __be16)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 -ENODATA;
}
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((__force __be16)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;
}
int fm_rx_set_volume(struct fmdev *fmdev, u16 vol_to_set)
{
u16 payload;
int ret;
if (fmdev->curr_fmmode != FM_MODE_RX)
return -EPERM;
if (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 */
int 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 */
int 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) */
int fm_rx_set_region(struct fmdev *fmdev, u8 region_to_set)
{
u16 payload;
u32 new_frq = 0;
int 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)*/
int 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 int fm_config_rx_mute_reg(struct fmdev *fmdev)
{
u16 payload, muteval;
int 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) */
int fm_rx_set_mute_mode(struct fmdev *fmdev, u8 mute_mode_toset)
{
u8 org_state;
int 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 */
int 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 */
int fm_rx_set_rfdepend_softmute(struct fmdev *fmdev, u8 rfdepend_mute)
{
u8 org_state;
int 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 */
int fm_rx_get_rssi_level(struct fmdev *fmdev, u16 *rssilvl)
{
__be16 curr_rssi_lel;
u32 resp_len;
int 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
*/
int fm_rx_set_rssi_threshold(struct fmdev *fmdev, short rssi_lvl_toset)
{
u16 payload;
int 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 */
int 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 */
int fm_rx_set_stereo_mono(struct fmdev *fmdev, u16 mode)
{
u16 payload;
int 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 */
int fm_rx_get_stereo_mono(struct fmdev *fmdev, u16 *mode)
{
__be16 curr_mode;
u32 resp_len;
int ret;
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) */
int fm_rx_set_deemphasis_mode(struct fmdev *fmdev, u16 mode)
{
u16 payload;
int 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 */
int 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 */
int fm_rx_set_rds_mode(struct fmdev *fmdev, u8 rds_en_dis)
{
u16 payload;
int 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 */
int 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) */
int fm_rx_set_rds_system(struct fmdev *fmdev, u8 rds_mode)
{
u16 payload;
int 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;
}
/* Configures Alternate Frequency switch mode */
int fm_rx_set_af_switch(struct fmdev *fmdev, u8 af_mode)
{
u16 payload;
int 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 */
int 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;
}