Back to home page

OSCL-LXR
 
 

     

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  *  FM Driver for Connectivity chip of Texas Instruments.
0004  *  This sub-module of FM driver implements FM RX functionality.
0005  *
0006  *  Copyright (C) 2011 Texas Instruments
0007  *  Author: Raja Mani <raja_mani@ti.com>
0008  *  Author: Manjunatha Halli <manjunatha_halli@ti.com>
0009  */
0010 
0011 #include "fmdrv.h"
0012 #include "fmdrv_common.h"
0013 #include "fmdrv_rx.h"
0014 
0015 void fm_rx_reset_rds_cache(struct fmdev *fmdev)
0016 {
0017     fmdev->rx.rds.flag = FM_RDS_DISABLE;
0018     fmdev->rx.rds.last_blk_idx = 0;
0019     fmdev->rx.rds.wr_idx = 0;
0020     fmdev->rx.rds.rd_idx = 0;
0021 
0022     if (fmdev->rx.af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON)
0023         fmdev->irq_info.mask |= FM_LEV_EVENT;
0024 }
0025 
0026 void fm_rx_reset_station_info(struct fmdev *fmdev)
0027 {
0028     fmdev->rx.stat_info.picode = FM_NO_PI_CODE;
0029     fmdev->rx.stat_info.afcache_size = 0;
0030     fmdev->rx.stat_info.af_list_max = 0;
0031 }
0032 
0033 int fm_rx_set_freq(struct fmdev *fmdev, u32 freq)
0034 {
0035     unsigned long timeleft;
0036     u16 payload, curr_frq, intr_flag;
0037     u32 curr_frq_in_khz;
0038     u32 resp_len;
0039     int ret;
0040 
0041     if (freq < fmdev->rx.region.bot_freq || freq > fmdev->rx.region.top_freq) {
0042         fmerr("Invalid frequency %d\n", freq);
0043         return -EINVAL;
0044     }
0045 
0046     /* Set audio enable */
0047     payload = FM_RX_AUDIO_ENABLE_I2S_AND_ANALOG;
0048 
0049     ret = fmc_send_cmd(fmdev, AUDIO_ENABLE_SET, REG_WR, &payload,
0050             sizeof(payload), NULL, NULL);
0051     if (ret < 0)
0052         return ret;
0053 
0054     /* Set hilo to automatic selection */
0055     payload = FM_RX_IFFREQ_HILO_AUTOMATIC;
0056     ret = fmc_send_cmd(fmdev, HILO_SET, REG_WR, &payload,
0057             sizeof(payload), NULL, NULL);
0058     if (ret < 0)
0059         return ret;
0060 
0061     /* Calculate frequency index and set*/
0062     payload = (freq - fmdev->rx.region.bot_freq) / FM_FREQ_MUL;
0063 
0064     ret = fmc_send_cmd(fmdev, FREQ_SET, REG_WR, &payload,
0065             sizeof(payload), NULL, NULL);
0066     if (ret < 0)
0067         return ret;
0068 
0069     /* Read flags - just to clear any pending interrupts if we had */
0070     ret = fmc_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, 2, NULL, NULL);
0071     if (ret < 0)
0072         return ret;
0073 
0074     /* Enable FR, BL interrupts */
0075     intr_flag = fmdev->irq_info.mask;
0076     fmdev->irq_info.mask = (FM_FR_EVENT | FM_BL_EVENT);
0077     payload = fmdev->irq_info.mask;
0078     ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
0079             sizeof(payload), NULL, NULL);
0080     if (ret < 0)
0081         return ret;
0082 
0083     /* Start tune */
0084     payload = FM_TUNER_PRESET_MODE;
0085     ret = fmc_send_cmd(fmdev, TUNER_MODE_SET, REG_WR, &payload,
0086             sizeof(payload), NULL, NULL);
0087     if (ret < 0)
0088         goto exit;
0089 
0090     /* Wait for tune ended interrupt */
0091     init_completion(&fmdev->maintask_comp);
0092     timeleft = wait_for_completion_timeout(&fmdev->maintask_comp,
0093             FM_DRV_TX_TIMEOUT);
0094     if (!timeleft) {
0095         fmerr("Timeout(%d sec),didn't get tune ended int\n",
0096                jiffies_to_msecs(FM_DRV_TX_TIMEOUT) / 1000);
0097         ret = -ETIMEDOUT;
0098         goto exit;
0099     }
0100 
0101     /* Read freq back to confirm */
0102     ret = fmc_send_cmd(fmdev, FREQ_SET, REG_RD, NULL, 2, &curr_frq, &resp_len);
0103     if (ret < 0)
0104         goto exit;
0105 
0106     curr_frq = be16_to_cpu((__force __be16)curr_frq);
0107     curr_frq_in_khz = (fmdev->rx.region.bot_freq + ((u32)curr_frq * FM_FREQ_MUL));
0108 
0109     if (curr_frq_in_khz != freq) {
0110         pr_info("Frequency is set to (%d) but requested freq is (%d)\n",
0111             curr_frq_in_khz, freq);
0112     }
0113 
0114     /* Update local cache  */
0115     fmdev->rx.freq = curr_frq_in_khz;
0116 exit:
0117     /* Re-enable default FM interrupts */
0118     fmdev->irq_info.mask = intr_flag;
0119     payload = fmdev->irq_info.mask;
0120     ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
0121             sizeof(payload), NULL, NULL);
0122     if (ret < 0)
0123         return ret;
0124 
0125     /* Reset RDS cache and current station pointers */
0126     fm_rx_reset_rds_cache(fmdev);
0127     fm_rx_reset_station_info(fmdev);
0128 
0129     return ret;
0130 }
0131 
0132 static int fm_rx_set_channel_spacing(struct fmdev *fmdev, u32 spacing)
0133 {
0134     u16 payload;
0135     int ret;
0136 
0137     if (spacing > 0 && spacing <= 50000)
0138         spacing = FM_CHANNEL_SPACING_50KHZ;
0139     else if (spacing > 50000 && spacing <= 100000)
0140         spacing = FM_CHANNEL_SPACING_100KHZ;
0141     else
0142         spacing = FM_CHANNEL_SPACING_200KHZ;
0143 
0144     /* set channel spacing */
0145     payload = spacing;
0146     ret = fmc_send_cmd(fmdev, CHANL_BW_SET, REG_WR, &payload,
0147             sizeof(payload), NULL, NULL);
0148     if (ret < 0)
0149         return ret;
0150 
0151     fmdev->rx.region.chanl_space = spacing * FM_FREQ_MUL;
0152 
0153     return ret;
0154 }
0155 
0156 int fm_rx_seek(struct fmdev *fmdev, u32 seek_upward,
0157         u32 wrap_around, u32 spacing)
0158 {
0159     u32 resp_len;
0160     u16 curr_frq, next_frq, last_frq;
0161     u16 payload, int_reason, intr_flag;
0162     u16 offset, space_idx;
0163     unsigned long timeleft;
0164     int ret;
0165 
0166     /* Set channel spacing */
0167     ret = fm_rx_set_channel_spacing(fmdev, spacing);
0168     if (ret < 0) {
0169         fmerr("Failed to set channel spacing\n");
0170         return ret;
0171     }
0172 
0173     /* Read the current frequency from chip */
0174     ret = fmc_send_cmd(fmdev, FREQ_SET, REG_RD, NULL,
0175             sizeof(curr_frq), &curr_frq, &resp_len);
0176     if (ret < 0)
0177         return ret;
0178 
0179     curr_frq = be16_to_cpu((__force __be16)curr_frq);
0180     last_frq = (fmdev->rx.region.top_freq - fmdev->rx.region.bot_freq) / FM_FREQ_MUL;
0181 
0182     /* Check the offset in order to be aligned to the channel spacing*/
0183     space_idx = fmdev->rx.region.chanl_space / FM_FREQ_MUL;
0184     offset = curr_frq % space_idx;
0185 
0186     next_frq = seek_upward ? curr_frq + space_idx /* Seek Up */ :
0187                 curr_frq - space_idx /* Seek Down */ ;
0188 
0189     /*
0190      * Add or subtract offset in order to stay aligned to the channel
0191      * spacing.
0192      */
0193     if ((short)next_frq < 0)
0194         next_frq = last_frq - offset;
0195     else if (next_frq > last_frq)
0196         next_frq = 0 + offset;
0197 
0198 again:
0199     /* Set calculated next frequency to perform seek */
0200     payload = next_frq;
0201     ret = fmc_send_cmd(fmdev, FREQ_SET, REG_WR, &payload,
0202             sizeof(payload), NULL, NULL);
0203     if (ret < 0)
0204         return ret;
0205 
0206     /* Set search direction (0:Seek Down, 1:Seek Up) */
0207     payload = (seek_upward ? FM_SEARCH_DIRECTION_UP : FM_SEARCH_DIRECTION_DOWN);
0208     ret = fmc_send_cmd(fmdev, SEARCH_DIR_SET, REG_WR, &payload,
0209             sizeof(payload), NULL, NULL);
0210     if (ret < 0)
0211         return ret;
0212 
0213     /* Read flags - just to clear any pending interrupts if we had */
0214     ret = fmc_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, 2, NULL, NULL);
0215     if (ret < 0)
0216         return ret;
0217 
0218     /* Enable FR, BL interrupts */
0219     intr_flag = fmdev->irq_info.mask;
0220     fmdev->irq_info.mask = (FM_FR_EVENT | FM_BL_EVENT);
0221     payload = fmdev->irq_info.mask;
0222     ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
0223             sizeof(payload), NULL, NULL);
0224     if (ret < 0)
0225         return ret;
0226 
0227     /* Start seek */
0228     payload = FM_TUNER_AUTONOMOUS_SEARCH_MODE;
0229     ret = fmc_send_cmd(fmdev, TUNER_MODE_SET, REG_WR, &payload,
0230             sizeof(payload), NULL, NULL);
0231     if (ret < 0)
0232         return ret;
0233 
0234     /* Wait for tune ended/band limit reached interrupt */
0235     init_completion(&fmdev->maintask_comp);
0236     timeleft = wait_for_completion_timeout(&fmdev->maintask_comp,
0237             FM_DRV_RX_SEEK_TIMEOUT);
0238     if (!timeleft) {
0239         fmerr("Timeout(%d sec),didn't get tune ended int\n",
0240                jiffies_to_msecs(FM_DRV_RX_SEEK_TIMEOUT) / 1000);
0241         return -ENODATA;
0242     }
0243 
0244     int_reason = fmdev->irq_info.flag & (FM_TUNE_COMPLETE | FM_BAND_LIMIT);
0245 
0246     /* Re-enable default FM interrupts */
0247     fmdev->irq_info.mask = intr_flag;
0248     payload = fmdev->irq_info.mask;
0249     ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
0250             sizeof(payload), NULL, NULL);
0251     if (ret < 0)
0252         return ret;
0253 
0254     if (int_reason & FM_BL_EVENT) {
0255         if (wrap_around == 0) {
0256             fmdev->rx.freq = seek_upward ?
0257                 fmdev->rx.region.top_freq :
0258                 fmdev->rx.region.bot_freq;
0259         } else {
0260             fmdev->rx.freq = seek_upward ?
0261                 fmdev->rx.region.bot_freq :
0262                 fmdev->rx.region.top_freq;
0263             /* Calculate frequency index to write */
0264             next_frq = (fmdev->rx.freq -
0265                     fmdev->rx.region.bot_freq) / FM_FREQ_MUL;
0266             goto again;
0267         }
0268     } else {
0269         /* Read freq to know where operation tune operation stopped */
0270         ret = fmc_send_cmd(fmdev, FREQ_SET, REG_RD, NULL, 2,
0271                 &curr_frq, &resp_len);
0272         if (ret < 0)
0273             return ret;
0274 
0275         curr_frq = be16_to_cpu((__force __be16)curr_frq);
0276         fmdev->rx.freq = (fmdev->rx.region.bot_freq +
0277                 ((u32)curr_frq * FM_FREQ_MUL));
0278 
0279     }
0280     /* Reset RDS cache and current station pointers */
0281     fm_rx_reset_rds_cache(fmdev);
0282     fm_rx_reset_station_info(fmdev);
0283 
0284     return ret;
0285 }
0286 
0287 int fm_rx_set_volume(struct fmdev *fmdev, u16 vol_to_set)
0288 {
0289     u16 payload;
0290     int ret;
0291 
0292     if (fmdev->curr_fmmode != FM_MODE_RX)
0293         return -EPERM;
0294 
0295     if (vol_to_set > FM_RX_VOLUME_MAX) {
0296         fmerr("Volume is not within(%d-%d) range\n",
0297                FM_RX_VOLUME_MIN, FM_RX_VOLUME_MAX);
0298         return -EINVAL;
0299     }
0300     vol_to_set *= FM_RX_VOLUME_GAIN_STEP;
0301 
0302     payload = vol_to_set;
0303     ret = fmc_send_cmd(fmdev, VOLUME_SET, REG_WR, &payload,
0304             sizeof(payload), NULL, NULL);
0305     if (ret < 0)
0306         return ret;
0307 
0308     fmdev->rx.volume = vol_to_set;
0309     return ret;
0310 }
0311 
0312 /* Get volume */
0313 int fm_rx_get_volume(struct fmdev *fmdev, u16 *curr_vol)
0314 {
0315     if (fmdev->curr_fmmode != FM_MODE_RX)
0316         return -EPERM;
0317 
0318     if (curr_vol == NULL) {
0319         fmerr("Invalid memory\n");
0320         return -ENOMEM;
0321     }
0322 
0323     *curr_vol = fmdev->rx.volume / FM_RX_VOLUME_GAIN_STEP;
0324 
0325     return 0;
0326 }
0327 
0328 /* To get current band's bottom and top frequency */
0329 int fm_rx_get_band_freq_range(struct fmdev *fmdev, u32 *bot_freq, u32 *top_freq)
0330 {
0331     if (bot_freq != NULL)
0332         *bot_freq = fmdev->rx.region.bot_freq;
0333 
0334     if (top_freq != NULL)
0335         *top_freq = fmdev->rx.region.top_freq;
0336 
0337     return 0;
0338 }
0339 
0340 /* Returns current band index (0-Europe/US; 1-Japan) */
0341 void fm_rx_get_region(struct fmdev *fmdev, u8 *region)
0342 {
0343     *region = fmdev->rx.region.fm_band;
0344 }
0345 
0346 /* Sets band (0-Europe/US; 1-Japan) */
0347 int fm_rx_set_region(struct fmdev *fmdev, u8 region_to_set)
0348 {
0349     u16 payload;
0350     u32 new_frq = 0;
0351     int ret;
0352 
0353     if (region_to_set != FM_BAND_EUROPE_US &&
0354         region_to_set != FM_BAND_JAPAN) {
0355         fmerr("Invalid band\n");
0356         return -EINVAL;
0357     }
0358 
0359     if (fmdev->rx.region.fm_band == region_to_set) {
0360         fmerr("Requested band is already configured\n");
0361         return 0;
0362     }
0363 
0364     /* Send cmd to set the band  */
0365     payload = (u16)region_to_set;
0366     ret = fmc_send_cmd(fmdev, BAND_SET, REG_WR, &payload,
0367             sizeof(payload), NULL, NULL);
0368     if (ret < 0)
0369         return ret;
0370 
0371     fmc_update_region_info(fmdev, region_to_set);
0372 
0373     /* Check whether current RX frequency is within band boundary */
0374     if (fmdev->rx.freq < fmdev->rx.region.bot_freq)
0375         new_frq = fmdev->rx.region.bot_freq;
0376     else if (fmdev->rx.freq > fmdev->rx.region.top_freq)
0377         new_frq = fmdev->rx.region.top_freq;
0378 
0379     if (new_frq) {
0380         fmdbg("Current freq is not within band limit boundary,switching to %d KHz\n",
0381               new_frq);
0382          /* Current RX frequency is not in range. So, update it */
0383         ret = fm_rx_set_freq(fmdev, new_frq);
0384     }
0385 
0386     return ret;
0387 }
0388 
0389 /* Reads current mute mode (Mute Off/On/Attenuate)*/
0390 int fm_rx_get_mute_mode(struct fmdev *fmdev, u8 *curr_mute_mode)
0391 {
0392     if (fmdev->curr_fmmode != FM_MODE_RX)
0393         return -EPERM;
0394 
0395     if (curr_mute_mode == NULL) {
0396         fmerr("Invalid memory\n");
0397         return -ENOMEM;
0398     }
0399 
0400     *curr_mute_mode = fmdev->rx.mute_mode;
0401 
0402     return 0;
0403 }
0404 
0405 static int fm_config_rx_mute_reg(struct fmdev *fmdev)
0406 {
0407     u16 payload, muteval;
0408     int ret;
0409 
0410     muteval = 0;
0411     switch (fmdev->rx.mute_mode) {
0412     case FM_MUTE_ON:
0413         muteval = FM_RX_AC_MUTE_MODE;
0414         break;
0415 
0416     case FM_MUTE_OFF:
0417         muteval = FM_RX_UNMUTE_MODE;
0418         break;
0419 
0420     case FM_MUTE_ATTENUATE:
0421         muteval = FM_RX_SOFT_MUTE_FORCE_MODE;
0422         break;
0423     }
0424     if (fmdev->rx.rf_depend_mute == FM_RX_RF_DEPENDENT_MUTE_ON)
0425         muteval |= FM_RX_RF_DEP_MODE;
0426     else
0427         muteval &= ~FM_RX_RF_DEP_MODE;
0428 
0429     payload = muteval;
0430     ret = fmc_send_cmd(fmdev, MUTE_STATUS_SET, REG_WR, &payload,
0431             sizeof(payload), NULL, NULL);
0432     if (ret < 0)
0433         return ret;
0434 
0435     return 0;
0436 }
0437 
0438 /* Configures mute mode (Mute Off/On/Attenuate) */
0439 int fm_rx_set_mute_mode(struct fmdev *fmdev, u8 mute_mode_toset)
0440 {
0441     u8 org_state;
0442     int ret;
0443 
0444     if (fmdev->rx.mute_mode == mute_mode_toset)
0445         return 0;
0446 
0447     org_state = fmdev->rx.mute_mode;
0448     fmdev->rx.mute_mode = mute_mode_toset;
0449 
0450     ret = fm_config_rx_mute_reg(fmdev);
0451     if (ret < 0) {
0452         fmdev->rx.mute_mode = org_state;
0453         return ret;
0454     }
0455 
0456     return 0;
0457 }
0458 
0459 /* Gets RF dependent soft mute mode enable/disable status */
0460 int fm_rx_get_rfdepend_softmute(struct fmdev *fmdev, u8 *curr_mute_mode)
0461 {
0462     if (fmdev->curr_fmmode != FM_MODE_RX)
0463         return -EPERM;
0464 
0465     if (curr_mute_mode == NULL) {
0466         fmerr("Invalid memory\n");
0467         return -ENOMEM;
0468     }
0469 
0470     *curr_mute_mode = fmdev->rx.rf_depend_mute;
0471 
0472     return 0;
0473 }
0474 
0475 /* Sets RF dependent soft mute mode */
0476 int fm_rx_set_rfdepend_softmute(struct fmdev *fmdev, u8 rfdepend_mute)
0477 {
0478     u8 org_state;
0479     int ret;
0480 
0481     if (fmdev->curr_fmmode != FM_MODE_RX)
0482         return -EPERM;
0483 
0484     if (rfdepend_mute != FM_RX_RF_DEPENDENT_MUTE_ON &&
0485         rfdepend_mute != FM_RX_RF_DEPENDENT_MUTE_OFF) {
0486         fmerr("Invalid RF dependent soft mute\n");
0487         return -EINVAL;
0488     }
0489     if (fmdev->rx.rf_depend_mute == rfdepend_mute)
0490         return 0;
0491 
0492     org_state = fmdev->rx.rf_depend_mute;
0493     fmdev->rx.rf_depend_mute = rfdepend_mute;
0494 
0495     ret = fm_config_rx_mute_reg(fmdev);
0496     if (ret < 0) {
0497         fmdev->rx.rf_depend_mute = org_state;
0498         return ret;
0499     }
0500 
0501     return 0;
0502 }
0503 
0504 /* Returns the signal strength level of current channel */
0505 int fm_rx_get_rssi_level(struct fmdev *fmdev, u16 *rssilvl)
0506 {
0507     __be16 curr_rssi_lel;
0508     u32 resp_len;
0509     int ret;
0510 
0511     if (rssilvl == NULL) {
0512         fmerr("Invalid memory\n");
0513         return -ENOMEM;
0514     }
0515     /* Read current RSSI level */
0516     ret = fmc_send_cmd(fmdev, RSSI_LVL_GET, REG_RD, NULL, 2,
0517             &curr_rssi_lel, &resp_len);
0518     if (ret < 0)
0519         return ret;
0520 
0521     *rssilvl = be16_to_cpu(curr_rssi_lel);
0522 
0523     return 0;
0524 }
0525 
0526 /*
0527  * Sets the signal strength level that once reached
0528  * will stop the auto search process
0529  */
0530 int fm_rx_set_rssi_threshold(struct fmdev *fmdev, short rssi_lvl_toset)
0531 {
0532     u16 payload;
0533     int ret;
0534 
0535     if (rssi_lvl_toset < FM_RX_RSSI_THRESHOLD_MIN ||
0536             rssi_lvl_toset > FM_RX_RSSI_THRESHOLD_MAX) {
0537         fmerr("Invalid RSSI threshold level\n");
0538         return -EINVAL;
0539     }
0540     payload = (u16)rssi_lvl_toset;
0541     ret = fmc_send_cmd(fmdev, SEARCH_LVL_SET, REG_WR, &payload,
0542             sizeof(payload), NULL, NULL);
0543     if (ret < 0)
0544         return ret;
0545 
0546     fmdev->rx.rssi_threshold = rssi_lvl_toset;
0547 
0548     return 0;
0549 }
0550 
0551 /* Returns current RX RSSI threshold value */
0552 int fm_rx_get_rssi_threshold(struct fmdev *fmdev, short *curr_rssi_lvl)
0553 {
0554     if (fmdev->curr_fmmode != FM_MODE_RX)
0555         return -EPERM;
0556 
0557     if (curr_rssi_lvl == NULL) {
0558         fmerr("Invalid memory\n");
0559         return -ENOMEM;
0560     }
0561 
0562     *curr_rssi_lvl = fmdev->rx.rssi_threshold;
0563 
0564     return 0;
0565 }
0566 
0567 /* Sets RX stereo/mono modes */
0568 int fm_rx_set_stereo_mono(struct fmdev *fmdev, u16 mode)
0569 {
0570     u16 payload;
0571     int ret;
0572 
0573     if (mode != FM_STEREO_MODE && mode != FM_MONO_MODE) {
0574         fmerr("Invalid mode\n");
0575         return -EINVAL;
0576     }
0577 
0578     /* Set stereo/mono mode */
0579     payload = (u16)mode;
0580     ret = fmc_send_cmd(fmdev, MOST_MODE_SET, REG_WR, &payload,
0581             sizeof(payload), NULL, NULL);
0582     if (ret < 0)
0583         return ret;
0584 
0585     /* Set stereo blending mode */
0586     payload = FM_STEREO_SOFT_BLEND;
0587     ret = fmc_send_cmd(fmdev, MOST_BLEND_SET, REG_WR, &payload,
0588             sizeof(payload), NULL, NULL);
0589     if (ret < 0)
0590         return ret;
0591 
0592     return 0;
0593 }
0594 
0595 /* Gets current RX stereo/mono mode */
0596 int fm_rx_get_stereo_mono(struct fmdev *fmdev, u16 *mode)
0597 {
0598     __be16 curr_mode;
0599     u32 resp_len;
0600     int ret;
0601 
0602     if (mode == NULL) {
0603         fmerr("Invalid memory\n");
0604         return -ENOMEM;
0605     }
0606 
0607     ret = fmc_send_cmd(fmdev, MOST_MODE_SET, REG_RD, NULL, 2,
0608             &curr_mode, &resp_len);
0609     if (ret < 0)
0610         return ret;
0611 
0612     *mode = be16_to_cpu(curr_mode);
0613 
0614     return 0;
0615 }
0616 
0617 /* Choose RX de-emphasis filter mode (50us/75us) */
0618 int fm_rx_set_deemphasis_mode(struct fmdev *fmdev, u16 mode)
0619 {
0620     u16 payload;
0621     int ret;
0622 
0623     if (fmdev->curr_fmmode != FM_MODE_RX)
0624         return -EPERM;
0625 
0626     if (mode != FM_RX_EMPHASIS_FILTER_50_USEC &&
0627             mode != FM_RX_EMPHASIS_FILTER_75_USEC) {
0628         fmerr("Invalid rx de-emphasis mode (%d)\n", mode);
0629         return -EINVAL;
0630     }
0631 
0632     payload = mode;
0633     ret = fmc_send_cmd(fmdev, DEMPH_MODE_SET, REG_WR, &payload,
0634             sizeof(payload), NULL, NULL);
0635     if (ret < 0)
0636         return ret;
0637 
0638     fmdev->rx.deemphasis_mode = mode;
0639 
0640     return 0;
0641 }
0642 
0643 /* Gets current RX de-emphasis filter mode */
0644 int fm_rx_get_deemph_mode(struct fmdev *fmdev, u16 *curr_deemphasis_mode)
0645 {
0646     if (fmdev->curr_fmmode != FM_MODE_RX)
0647         return -EPERM;
0648 
0649     if (curr_deemphasis_mode == NULL) {
0650         fmerr("Invalid memory\n");
0651         return -ENOMEM;
0652     }
0653 
0654     *curr_deemphasis_mode = fmdev->rx.deemphasis_mode;
0655 
0656     return 0;
0657 }
0658 
0659 /* Enable/Disable RX RDS */
0660 int fm_rx_set_rds_mode(struct fmdev *fmdev, u8 rds_en_dis)
0661 {
0662     u16 payload;
0663     int ret;
0664 
0665     if (rds_en_dis != FM_RDS_ENABLE && rds_en_dis != FM_RDS_DISABLE) {
0666         fmerr("Invalid rds option\n");
0667         return -EINVAL;
0668     }
0669 
0670     if (rds_en_dis == FM_RDS_ENABLE
0671         && fmdev->rx.rds.flag == FM_RDS_DISABLE) {
0672         /* Turn on RX RDS and RDS circuit */
0673         payload = FM_RX_PWR_SET_FM_AND_RDS_BLK_ON;
0674         ret = fmc_send_cmd(fmdev, POWER_SET, REG_WR, &payload,
0675                 sizeof(payload), NULL, NULL);
0676         if (ret < 0)
0677             return ret;
0678 
0679         /* Clear and reset RDS FIFO */
0680         payload = FM_RX_RDS_FLUSH_FIFO;
0681         ret = fmc_send_cmd(fmdev, RDS_CNTRL_SET, REG_WR, &payload,
0682         sizeof(payload), NULL, NULL);
0683         if (ret < 0)
0684             return ret;
0685 
0686         /* Read flags - just to clear any pending interrupts. */
0687         ret = fmc_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, 2,
0688                 NULL, NULL);
0689         if (ret < 0)
0690             return ret;
0691 
0692         /* Set RDS FIFO threshold value */
0693         payload = FM_RX_RDS_FIFO_THRESHOLD;
0694         ret = fmc_send_cmd(fmdev, RDS_MEM_SET, REG_WR, &payload,
0695         sizeof(payload), NULL, NULL);
0696         if (ret < 0)
0697             return ret;
0698 
0699         /* Enable RDS interrupt */
0700         fmdev->irq_info.mask |= FM_RDS_EVENT;
0701         payload = fmdev->irq_info.mask;
0702         ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
0703                 sizeof(payload), NULL, NULL);
0704         if (ret < 0) {
0705             fmdev->irq_info.mask &= ~FM_RDS_EVENT;
0706             return ret;
0707         }
0708 
0709         /* Update our local flag */
0710         fmdev->rx.rds.flag = FM_RDS_ENABLE;
0711     } else if (rds_en_dis == FM_RDS_DISABLE
0712            && fmdev->rx.rds.flag == FM_RDS_ENABLE) {
0713         /* Turn off RX RDS */
0714         payload = FM_RX_PWR_SET_FM_ON_RDS_OFF;
0715         ret = fmc_send_cmd(fmdev, POWER_SET, REG_WR, &payload,
0716                 sizeof(payload), NULL, NULL);
0717         if (ret < 0)
0718             return ret;
0719 
0720         /* Reset RDS pointers */
0721         fmdev->rx.rds.last_blk_idx = 0;
0722         fmdev->rx.rds.wr_idx = 0;
0723         fmdev->rx.rds.rd_idx = 0;
0724         fm_rx_reset_station_info(fmdev);
0725 
0726         /* Update RDS local cache */
0727         fmdev->irq_info.mask &= ~(FM_RDS_EVENT);
0728         fmdev->rx.rds.flag = FM_RDS_DISABLE;
0729     }
0730 
0731     return 0;
0732 }
0733 
0734 /* Returns current RX RDS enable/disable status */
0735 int fm_rx_get_rds_mode(struct fmdev *fmdev, u8 *curr_rds_en_dis)
0736 {
0737     if (fmdev->curr_fmmode != FM_MODE_RX)
0738         return -EPERM;
0739 
0740     if (curr_rds_en_dis == NULL) {
0741         fmerr("Invalid memory\n");
0742         return -ENOMEM;
0743     }
0744 
0745     *curr_rds_en_dis = fmdev->rx.rds.flag;
0746 
0747     return 0;
0748 }
0749 
0750 /* Sets RDS operation mode (RDS/RDBS) */
0751 int fm_rx_set_rds_system(struct fmdev *fmdev, u8 rds_mode)
0752 {
0753     u16 payload;
0754     int ret;
0755 
0756     if (fmdev->curr_fmmode != FM_MODE_RX)
0757         return -EPERM;
0758 
0759     if (rds_mode != FM_RDS_SYSTEM_RDS && rds_mode != FM_RDS_SYSTEM_RBDS) {
0760         fmerr("Invalid rds mode\n");
0761         return -EINVAL;
0762     }
0763     /* Set RDS operation mode */
0764     payload = (u16)rds_mode;
0765     ret = fmc_send_cmd(fmdev, RDS_SYSTEM_SET, REG_WR, &payload,
0766             sizeof(payload), NULL, NULL);
0767     if (ret < 0)
0768         return ret;
0769 
0770     fmdev->rx.rds_mode = rds_mode;
0771 
0772     return 0;
0773 }
0774 
0775 /* Configures Alternate Frequency switch mode */
0776 int fm_rx_set_af_switch(struct fmdev *fmdev, u8 af_mode)
0777 {
0778     u16 payload;
0779     int ret;
0780 
0781     if (fmdev->curr_fmmode != FM_MODE_RX)
0782         return -EPERM;
0783 
0784     if (af_mode != FM_RX_RDS_AF_SWITCH_MODE_ON &&
0785         af_mode != FM_RX_RDS_AF_SWITCH_MODE_OFF) {
0786         fmerr("Invalid af mode\n");
0787         return -EINVAL;
0788     }
0789     /* Enable/disable low RSSI interrupt based on af_mode */
0790     if (af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON)
0791         fmdev->irq_info.mask |= FM_LEV_EVENT;
0792     else
0793         fmdev->irq_info.mask &= ~FM_LEV_EVENT;
0794 
0795     payload = fmdev->irq_info.mask;
0796     ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
0797             sizeof(payload), NULL, NULL);
0798     if (ret < 0)
0799         return ret;
0800 
0801     fmdev->rx.af_mode = af_mode;
0802 
0803     return 0;
0804 }
0805 
0806 /* Returns Alternate Frequency switch status */
0807 int fm_rx_get_af_switch(struct fmdev *fmdev, u8 *af_mode)
0808 {
0809     if (fmdev->curr_fmmode != FM_MODE_RX)
0810         return -EPERM;
0811 
0812     if (af_mode == NULL) {
0813         fmerr("Invalid memory\n");
0814         return -ENOMEM;
0815     }
0816 
0817     *af_mode = fmdev->rx.af_mode;
0818 
0819     return 0;
0820 }
[ Source navigation ] [ Diff markup ] [ Identifier search ] [ general search ]

This page was automatically generated by the 2.1.0 LXR engine.

The LXR team
Valid CSS 2.1! Valid HTML 4.01!