drivers/media/radio/wl128x/fmdrv_rx.c

   1 /*
   2  *  FM Driver for Connectivity chip of Texas Instruments.
   3  *  This sub-module of FM driver implements FM RX functionality.
   4  *
   5  *  Copyright (C) 2011 Texas Instruments
   6  *  Author: Raja Mani <raja_mani@ti.com>
   7  *  Author: Manjunatha Halli <manjunatha_halli@ti.com>
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License version 2 as
  11  *  published by the Free Software Foundation.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  */
  23
  24 #include "fmdrv.h"
  25 #include "fmdrv_common.h"
  26 #include "fmdrv_rx.h"
  27
  28 void fm_rx_reset_rds_cache(struct fmdev *fmdev)
  29 {
  30         fmdev->rx.rds.flag = FM_RDS_DISABLE;
  31         fmdev->rx.rds.last_blk_idx = 0;
  32         fmdev->rx.rds.wr_idx = 0;
  33         fmdev->rx.rds.rd_idx = 0;
  34
  35         if (fmdev->rx.af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON)
  36                 fmdev->irq_info.mask |= FM_LEV_EVENT;
  37 }
  38
  39 void fm_rx_reset_station_info(struct fmdev *fmdev)
  40 {
  41         fmdev->rx.stat_info.picode = FM_NO_PI_CODE;
  42         fmdev->rx.stat_info.afcache_size = 0;
  43         fmdev->rx.stat_info.af_list_max = 0;
  44 }
  45
  46 u32 fm_rx_set_freq(struct fmdev *fmdev, u32 freq)
  47 {
  48         unsigned long timeleft;
  49         u16 payload, curr_frq, intr_flag;
  50         u32 curr_frq_in_khz;
  51         u32 ret, resp_len;
  52
  53         if (freq < fmdev->rx.region.bot_freq || freq > fmdev->rx.region.top_freq) {
  54                 fmerr("Invalid frequency %d\n", freq);
  55                 return -EINVAL;
  56         }
  57
  58         /* Set audio enable */
  59         payload = FM_RX_AUDIO_ENABLE_I2S_AND_ANALOG;
  60
  61         ret = fmc_send_cmd(fmdev, AUDIO_ENABLE_SET, REG_WR, &payload,
  62                         sizeof(payload), NULL, NULL);
  63         if (ret < 0)
  64                 return ret;
  65
  66         /* Set hilo to automatic selection */
  67         payload = FM_RX_IFFREQ_HILO_AUTOMATIC;
  68         ret = fmc_send_cmd(fmdev, HILO_SET, REG_WR, &payload,
  69                         sizeof(payload), NULL, NULL);
  70         if (ret < 0)
  71                 return ret;
  72
  73         /* Calculate frequency index and set*/
  74         payload = (freq - fmdev->rx.region.bot_freq) / FM_FREQ_MUL;
  75
  76         ret = fmc_send_cmd(fmdev, FREQ_SET, REG_WR, &payload,
  77                         sizeof(payload), NULL, NULL);
  78         if (ret < 0)
  79                 return ret;
  80
  81         /* Read flags - just to clear any pending interrupts if we had */
  82         ret = fmc_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, 2, NULL, NULL);
  83         if (ret < 0)
  84                 return ret;
  85
  86         /* Enable FR, BL interrupts */
  87         intr_flag = fmdev->irq_info.mask;
  88         fmdev->irq_info.mask = (FM_FR_EVENT | FM_BL_EVENT);
  89         payload = fmdev->irq_info.mask;
  90         ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
  91                         sizeof(payload), NULL, NULL);
  92         if (ret < 0)
  93                 return ret;
  94
  95         /* Start tune */
  96         payload = FM_TUNER_PRESET_MODE;
  97         ret = fmc_send_cmd(fmdev, TUNER_MODE_SET, REG_WR, &payload,
  98                         sizeof(payload), NULL, NULL);
  99         if (ret < 0)
 100                 goto exit;
 101
 102         /* Wait for tune ended interrupt */
 103         init_completion(&fmdev->maintask_comp);
 104         timeleft = wait_for_completion_timeout(&fmdev->maintask_comp,
 105                         FM_DRV_TX_TIMEOUT);
 106         if (!timeleft) {
 107                 fmerr("Timeout(%d sec),didn't get tune ended int\n",
 108                            jiffies_to_msecs(FM_DRV_TX_TIMEOUT) / 1000);
 109                 ret = -ETIMEDOUT;
 110                 goto exit;
 111         }
 112
 113         /* Read freq back to confirm */
 114         ret = fmc_send_cmd(fmdev, FREQ_SET, REG_RD, NULL, 2, &curr_frq, &resp_len);
 115         if (ret < 0)
 116                 goto exit;
 117
 118         curr_frq = be16_to_cpu(curr_frq);
 119         curr_frq_in_khz = (fmdev->rx.region.bot_freq + ((u32)curr_frq * FM_FREQ_MUL));
 120
 121         if (curr_frq_in_khz != freq) {
 122                 pr_info("Frequency is set to (%d) but "
 123                            "requested freq is (%d)\n", curr_frq_in_khz, freq);
 124         }
 125
 126         /* Update local cache  */
 127         fmdev->rx.freq = curr_frq_in_khz;
 128 exit:
 129         /* Re-enable default FM interrupts */
 130         fmdev->irq_info.mask = intr_flag;
 131         payload = fmdev->irq_info.mask;
 132         ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
 133                         sizeof(payload), NULL, NULL);
 134         if (ret < 0)
 135                 return ret;
 136
 137         /* Reset RDS cache and current station pointers */
 138         fm_rx_reset_rds_cache(fmdev);
 139         fm_rx_reset_station_info(fmdev);
 140
 141         return ret;
 142 }
 143
 144 static u32 fm_rx_set_channel_spacing(struct fmdev *fmdev, u32 spacing)
 145 {
 146         u16 payload;
 147         u32 ret;
 148
 149         if (spacing > 0 && spacing <= 50000)
 150                 spacing = FM_CHANNEL_SPACING_50KHZ;
 151         else if (spacing > 50000 && spacing <= 100000)
 152                 spacing = FM_CHANNEL_SPACING_100KHZ;
 153         else
 154                 spacing = FM_CHANNEL_SPACING_200KHZ;
 155
 156         /* set channel spacing */
 157         payload = spacing;
 158         ret = fmc_send_cmd(fmdev, CHANL_BW_SET, REG_WR, &payload,
 159                         sizeof(payload), NULL, NULL);
 160         if (ret < 0)
 161                 return ret;
 162
 163         fmdev->rx.region.chanl_space = spacing * FM_FREQ_MUL;
 164
 165         return ret;
 166 }
 167
 168 u32 fm_rx_seek(struct fmdev *fmdev, u32 seek_upward,
 169                 u32 wrap_around, u32 spacing)
 170 {
 171         u32 resp_len;
 172         u16 curr_frq, next_frq, last_frq;
 173         u16 payload, int_reason, intr_flag;
 174         u16 offset, space_idx;
 175         unsigned long timeleft;
 176         u32 ret;
 177
 178         /* Set channel spacing */
 179         ret = fm_rx_set_channel_spacing(fmdev, spacing);
 180         if (ret < 0) {
 181                 fmerr("Failed to set channel spacing\n");
 182                 return ret;
 183         }
 184
 185         /* Read the current frequency from chip */
 186         ret = fmc_send_cmd(fmdev, FREQ_SET, REG_RD, NULL,
 187                         sizeof(curr_frq), &curr_frq, &resp_len);
 188         if (ret < 0)
 189                 return ret;
 190
 191         curr_frq = be16_to_cpu(curr_frq);
 192         last_frq = (fmdev->rx.region.top_freq - fmdev->rx.region.bot_freq) / FM_FREQ_MUL;
 193
 194         /* Check the offset in order to be aligned to the channel spacing*/
 195         space_idx = fmdev->rx.region.chanl_space / FM_FREQ_MUL;
 196         offset = curr_frq % space_idx;
 197
 198         next_frq = seek_upward ? curr_frq + space_idx /* Seek Up */ :
 199                                 curr_frq - space_idx /* Seek Down */ ;
 200
 201         /*
 202          * Add or subtract offset in order to stay aligned to the channel
 203          * spacing.
 204          */
 205         if ((short)next_frq < 0)
 206                 next_frq = last_frq - offset;
 207         else if (next_frq > last_frq)
 208                 next_frq = 0 + offset;
 209
 210 again:
 211         /* Set calculated next frequency to perform seek */
 212         payload = next_frq;
 213         ret = fmc_send_cmd(fmdev, FREQ_SET, REG_WR, &payload,
 214                         sizeof(payload), NULL, NULL);
 215         if (ret < 0)
 216                 return ret;
 217
 218         /* Set search direction (0:Seek Down, 1:Seek Up) */
 219         payload = (seek_upward ? FM_SEARCH_DIRECTION_UP : FM_SEARCH_DIRECTION_DOWN);
 220         ret = fmc_send_cmd(fmdev, SEARCH_DIR_SET, REG_WR, &payload,
 221                         sizeof(payload), NULL, NULL);
 222         if (ret < 0)
 223                 return ret;
 224
 225         /* Read flags - just to clear any pending interrupts if we had */
 226         ret = fmc_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, 2, NULL, NULL);
 227         if (ret < 0)
 228                 return ret;
 229
 230         /* Enable FR, BL interrupts */
 231         intr_flag = fmdev->irq_info.mask;
 232         fmdev->irq_info.mask = (FM_FR_EVENT | FM_BL_EVENT);
 233         payload = fmdev->irq_info.mask;
 234         ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
 235                         sizeof(payload), NULL, NULL);
 236         if (ret < 0)
 237                 return ret;
 238
 239         /* Start seek */
 240         payload = FM_TUNER_AUTONOMOUS_SEARCH_MODE;
 241         ret = fmc_send_cmd(fmdev, TUNER_MODE_SET, REG_WR, &payload,
 242                         sizeof(payload), NULL, NULL);
 243         if (ret < 0)
 244                 return ret;
 245
 246         /* Wait for tune ended/band limit reached interrupt */
 247         init_completion(&fmdev->maintask_comp);
 248         timeleft = wait_for_completion_timeout(&fmdev->maintask_comp,
 249                         FM_DRV_RX_SEEK_TIMEOUT);
 250         if (!timeleft) {
 251                 fmerr("Timeout(%d sec),didn't get tune ended int\n",
 252                            jiffies_to_msecs(FM_DRV_RX_SEEK_TIMEOUT) / 1000);
 253                 return -ETIMEDOUT;
 254         }
 255
 256         int_reason = fmdev->irq_info.flag & (FM_TUNE_COMPLETE | FM_BAND_LIMIT);
 257
 258         /* Re-enable default FM interrupts */
 259         fmdev->irq_info.mask = intr_flag;
 260         payload = fmdev->irq_info.mask;
 261         ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
 262                         sizeof(payload), NULL, NULL);
 263         if (ret < 0)
 264                 return ret;
 265
 266         if (int_reason & FM_BL_EVENT) {
 267                 if (wrap_around == 0) {
 268                         fmdev->rx.freq = seek_upward ?
 269                                 fmdev->rx.region.top_freq :
 270                                 fmdev->rx.region.bot_freq;
 271                 } else {
 272                         fmdev->rx.freq = seek_upward ?
 273                                 fmdev->rx.region.bot_freq :
 274                                 fmdev->rx.region.top_freq;
 275                         /* Calculate frequency index to write */
 276                         next_frq = (fmdev->rx.freq -
 277                                         fmdev->rx.region.bot_freq) / FM_FREQ_MUL;
 278                         goto again;
 279                 }
 280         } else {
 281                 /* Read freq to know where operation tune operation stopped */
 282                 ret = fmc_send_cmd(fmdev, FREQ_SET, REG_RD, NULL, 2,
 283                                 &curr_frq, &resp_len);
 284                 if (ret < 0)
 285                         return ret;
 286
 287                 curr_frq = be16_to_cpu(curr_frq);
 288                 fmdev->rx.freq = (fmdev->rx.region.bot_freq +
 289                                 ((u32)curr_frq * FM_FREQ_MUL));
 290
 291         }
 292         /* Reset RDS cache and current station pointers */
 293         fm_rx_reset_rds_cache(fmdev);
 294         fm_rx_reset_station_info(fmdev);
 295
 296         return ret;
 297 }
 298
 299 u32 fm_rx_set_volume(struct fmdev *fmdev, u16 vol_to_set)
 300 {
 301         u16 payload;
 302         u32 ret;
 303
 304         if (fmdev->curr_fmmode != FM_MODE_RX)
 305                 return -EPERM;
 306
 307         if (vol_to_set < FM_RX_VOLUME_MIN || vol_to_set > FM_RX_VOLUME_MAX) {
 308                 fmerr("Volume is not within(%d-%d) range\n",
 309                            FM_RX_VOLUME_MIN, FM_RX_VOLUME_MAX);
 310                 return -EINVAL;
 311         }
 312         vol_to_set *= FM_RX_VOLUME_GAIN_STEP;
 313
 314         payload = vol_to_set;
 315         ret = fmc_send_cmd(fmdev, VOLUME_SET, REG_WR, &payload,
 316                         sizeof(payload), NULL, NULL);
 317         if (ret < 0)
 318                 return ret;
 319
 320         fmdev->rx.volume = vol_to_set;
 321         return ret;
 322 }
 323
 324 /* Get volume */
 325 u32 fm_rx_get_volume(struct fmdev *fmdev, u16 *curr_vol)
 326 {
 327         if (fmdev->curr_fmmode != FM_MODE_RX)
 328                 return -EPERM;
 329
 330         if (curr_vol == NULL) {
 331                 fmerr("Invalid memory\n");
 332                 return -ENOMEM;
 333         }
 334
 335         *curr_vol = fmdev->rx.volume / FM_RX_VOLUME_GAIN_STEP;
 336
 337         return 0;
 338 }
 339
 340 /* To get current band's bottom and top frequency */
 341 u32 fm_rx_get_band_freq_range(struct fmdev *fmdev, u32 *bot_freq, u32 *top_freq)
 342 {
 343         if (bot_freq != NULL)
 344                 *bot_freq = fmdev->rx.region.bot_freq;
 345
 346         if (top_freq != NULL)
 347                 *top_freq = fmdev->rx.region.top_freq;
 348
 349         return 0;
 350 }
 351
 352 /* Returns current band index (0-Europe/US; 1-Japan) */
 353 void fm_rx_get_region(struct fmdev *fmdev, u8 *region)
 354 {
 355         *region = fmdev->rx.region.fm_band;
 356 }
 357
 358 /* Sets band (0-Europe/US; 1-Japan) */
 359 u32 fm_rx_set_region(struct fmdev *fmdev, u8 region_to_set)
 360 {
 361         u16 payload;
 362         u32 new_frq = 0;
 363         u32 ret;
 364
 365         if (region_to_set != FM_BAND_EUROPE_US &&
 366             region_to_set != FM_BAND_JAPAN) {
 367                 fmerr("Invalid band\n");
 368                 return -EINVAL;
 369         }
 370
 371         if (fmdev->rx.region.fm_band == region_to_set) {
 372                 fmerr("Requested band is already configured\n");
 373                 return 0;
 374         }
 375
 376         /* Send cmd to set the band  */
 377         payload = (u16)region_to_set;
 378         ret = fmc_send_cmd(fmdev, BAND_SET, REG_WR, &payload,
 379                         sizeof(payload), NULL, NULL);
 380         if (ret < 0)
 381                 return ret;
 382
 383         fmc_update_region_info(fmdev, region_to_set);
 384
 385         /* Check whether current RX frequency is within band boundary */
 386         if (fmdev->rx.freq < fmdev->rx.region.bot_freq)
 387                 new_frq = fmdev->rx.region.bot_freq;
 388         else if (fmdev->rx.freq > fmdev->rx.region.top_freq)
 389                 new_frq = fmdev->rx.region.top_freq;
 390
 391         if (new_frq) {
 392                 fmdbg("Current freq is not within band limit boundary,"
 393                                 "switching to %d KHz\n", new_frq);
 394                  /* Current RX frequency is not in range. So, update it */
 395                 ret = fm_rx_set_freq(fmdev, new_frq);
 396         }
 397
 398         return ret;
 399 }
 400
 401 /* Reads current mute mode (Mute Off/On/Attenuate)*/
 402 u32 fm_rx_get_mute_mode(struct fmdev *fmdev, u8 *curr_mute_mode)
 403 {
 404         if (fmdev->curr_fmmode != FM_MODE_RX)
 405                 return -EPERM;
 406
 407         if (curr_mute_mode == NULL) {
 408                 fmerr("Invalid memory\n");
 409                 return -ENOMEM;
 410         }
 411
 412         *curr_mute_mode = fmdev->rx.mute_mode;
 413
 414         return 0;
 415 }
 416
 417 static u32 fm_config_rx_mute_reg(struct fmdev *fmdev)
 418 {
 419         u16 payload, muteval;
 420         u32 ret;
 421
 422         muteval = 0;
 423         switch (fmdev->rx.mute_mode) {
 424         case FM_MUTE_ON:
 425                 muteval = FM_RX_AC_MUTE_MODE;
 426                 break;
 427
 428         case FM_MUTE_OFF:
 429                 muteval = FM_RX_UNMUTE_MODE;
 430                 break;
 431
 432         case FM_MUTE_ATTENUATE:
 433                 muteval = FM_RX_SOFT_MUTE_FORCE_MODE;
 434                 break;
 435         }
 436         if (fmdev->rx.rf_depend_mute == FM_RX_RF_DEPENDENT_MUTE_ON)
 437                 muteval |= FM_RX_RF_DEP_MODE;
 438         else
 439                 muteval &= ~FM_RX_RF_DEP_MODE;
 440
 441         payload = muteval;
 442         ret = fmc_send_cmd(fmdev, MUTE_STATUS_SET, REG_WR, &payload,
 443                         sizeof(payload), NULL, NULL);
 444         if (ret < 0)
 445                 return ret;
 446
 447         return 0;
 448 }
 449
 450 /* Configures mute mode (Mute Off/On/Attenuate) */
 451 u32 fm_rx_set_mute_mode(struct fmdev *fmdev, u8 mute_mode_toset)
 452 {
 453         u8 org_state;
 454         u32 ret;
 455
 456         if (fmdev->rx.mute_mode == mute_mode_toset)
 457                 return 0;
 458
 459         org_state = fmdev->rx.mute_mode;
 460         fmdev->rx.mute_mode = mute_mode_toset;
 461
 462         ret = fm_config_rx_mute_reg(fmdev);
 463         if (ret < 0) {
 464                 fmdev->rx.mute_mode = org_state;
 465                 return ret;
 466         }
 467
 468         return 0;
 469 }
 470
 471 /* Gets RF dependent soft mute mode enable/disable status */
 472 u32 fm_rx_get_rfdepend_softmute(struct fmdev *fmdev, u8 *curr_mute_mode)
 473 {
 474         if (fmdev->curr_fmmode != FM_MODE_RX)
 475                 return -EPERM;
 476
 477         if (curr_mute_mode == NULL) {
 478                 fmerr("Invalid memory\n");
 479                 return -ENOMEM;
 480         }
 481
 482         *curr_mute_mode = fmdev->rx.rf_depend_mute;
 483
 484         return 0;
 485 }
 486
 487 /* Sets RF dependent soft mute mode */
 488 u32 fm_rx_set_rfdepend_softmute(struct fmdev *fmdev, u8 rfdepend_mute)
 489 {
 490         u8 org_state;
 491         u32 ret;
 492
 493         if (fmdev->curr_fmmode != FM_MODE_RX)
 494                 return -EPERM;
 495
 496         if (rfdepend_mute != FM_RX_RF_DEPENDENT_MUTE_ON &&
 497             rfdepend_mute != FM_RX_RF_DEPENDENT_MUTE_OFF) {
 498                 fmerr("Invalid RF dependent soft mute\n");
 499                 return -EINVAL;
 500         }
 501         if (fmdev->rx.rf_depend_mute == rfdepend_mute)
 502                 return 0;
 503
 504         org_state = fmdev->rx.rf_depend_mute;
 505         fmdev->rx.rf_depend_mute = rfdepend_mute;
 506
 507         ret = fm_config_rx_mute_reg(fmdev);
 508         if (ret < 0) {
 509                 fmdev->rx.rf_depend_mute = org_state;
 510                 return ret;
 511         }
 512
 513         return 0;
 514 }
 515
 516 /* Returns the signal strength level of current channel */
 517 u32 fm_rx_get_rssi_level(struct fmdev *fmdev, u16 *rssilvl)
 518 {
 519         u16 curr_rssi_lel;
 520         u32 resp_len;
 521         u32 ret;
 522
 523         if (rssilvl == NULL) {
 524                 fmerr("Invalid memory\n");
 525                 return -ENOMEM;
 526         }
 527         /* Read current RSSI level */
 528         ret = fmc_send_cmd(fmdev, RSSI_LVL_GET, REG_RD, NULL, 2,
 529                         &curr_rssi_lel, &resp_len);
 530         if (ret < 0)
 531                 return ret;
 532
 533         *rssilvl = be16_to_cpu(curr_rssi_lel);
 534
 535         return 0;
 536 }
 537
 538 /*
 539  * Sets the signal strength level that once reached
 540  * will stop the auto search process
 541  */
 542 u32 fm_rx_set_rssi_threshold(struct fmdev *fmdev, short rssi_lvl_toset)
 543 {
 544         u16 payload;
 545         u32 ret;
 546
 547         if (rssi_lvl_toset < FM_RX_RSSI_THRESHOLD_MIN ||
 548                         rssi_lvl_toset > FM_RX_RSSI_THRESHOLD_MAX) {
 549                 fmerr("Invalid RSSI threshold level\n");
 550                 return -EINVAL;
 551         }
 552         payload = (u16)rssi_lvl_toset;
 553         ret = fmc_send_cmd(fmdev, SEARCH_LVL_SET, REG_WR, &payload,
 554                         sizeof(payload), NULL, NULL);
 555         if (ret < 0)
 556                 return ret;
 557
 558         fmdev->rx.rssi_threshold = rssi_lvl_toset;
 559
 560         return 0;
 561 }
 562
 563 /* Returns current RX RSSI threshold value */
 564 u32 fm_rx_get_rssi_threshold(struct fmdev *fmdev, short *curr_rssi_lvl)
 565 {
 566         if (fmdev->curr_fmmode != FM_MODE_RX)
 567                 return -EPERM;
 568
 569         if (curr_rssi_lvl == NULL) {
 570                 fmerr("Invalid memory\n");
 571                 return -ENOMEM;
 572         }
 573
 574         *curr_rssi_lvl = fmdev->rx.rssi_threshold;
 575
 576         return 0;
 577 }
 578
 579 /* Sets RX stereo/mono modes */
 580 u32 fm_rx_set_stereo_mono(struct fmdev *fmdev, u16 mode)
 581 {
 582         u16 payload;
 583         u32 ret;
 584
 585         if (mode != FM_STEREO_MODE && mode != FM_MONO_MODE) {
 586                 fmerr("Invalid mode\n");
 587                 return -EINVAL;
 588         }
 589
 590         /* Set stereo/mono mode */
 591         payload = (u16)mode;
 592         ret = fmc_send_cmd(fmdev, MOST_MODE_SET, REG_WR, &payload,
 593                         sizeof(payload), NULL, NULL);
 594         if (ret < 0)
 595                 return ret;
 596
 597         /* Set stereo blending mode */
 598         payload = FM_STEREO_SOFT_BLEND;
 599         ret = fmc_send_cmd(fmdev, MOST_BLEND_SET, REG_WR, &payload,
 600                         sizeof(payload), NULL, NULL);
 601         if (ret < 0)
 602                 return ret;
 603
 604         return 0;
 605 }
 606
 607 /* Gets current RX stereo/mono mode */
 608 u32 fm_rx_get_stereo_mono(struct fmdev *fmdev, u16 *mode)
 609 {
 610         u16 curr_mode;
 611         u32 ret, resp_len;
 612
 613         if (mode == NULL) {
 614                 fmerr("Invalid memory\n");
 615                 return -ENOMEM;
 616         }
 617
 618         ret = fmc_send_cmd(fmdev, MOST_MODE_SET, REG_RD, NULL, 2,
 619                         &curr_mode, &resp_len);
 620         if (ret < 0)
 621                 return ret;
 622
 623         *mode = be16_to_cpu(curr_mode);
 624
 625         return 0;
 626 }
 627
 628 /* Choose RX de-emphasis filter mode (50us/75us) */
 629 u32 fm_rx_set_deemphasis_mode(struct fmdev *fmdev, u16 mode)
 630 {
 631         u16 payload;
 632         u32 ret;
 633
 634         if (fmdev->curr_fmmode != FM_MODE_RX)
 635                 return -EPERM;
 636
 637         if (mode != FM_RX_EMPHASIS_FILTER_50_USEC &&
 638                         mode != FM_RX_EMPHASIS_FILTER_75_USEC) {
 639                 fmerr("Invalid rx de-emphasis mode (%d)\n", mode);
 640                 return -EINVAL;
 641         }
 642
 643         payload = mode;
 644         ret = fmc_send_cmd(fmdev, DEMPH_MODE_SET, REG_WR, &payload,
 645                         sizeof(payload), NULL, NULL);
 646         if (ret < 0)
 647                 return ret;
 648
 649         fmdev->rx.deemphasis_mode = mode;
 650
 651         return 0;
 652 }
 653
 654 /* Gets current RX de-emphasis filter mode */
 655 u32 fm_rx_get_deemph_mode(struct fmdev *fmdev, u16 *curr_deemphasis_mode)
 656 {
 657         if (fmdev->curr_fmmode != FM_MODE_RX)
 658                 return -EPERM;
 659
 660         if (curr_deemphasis_mode == NULL) {
 661                 fmerr("Invalid memory\n");
 662                 return -ENOMEM;
 663         }
 664
 665         *curr_deemphasis_mode = fmdev->rx.deemphasis_mode;
 666
 667         return 0;
 668 }
 669
 670 /* Enable/Disable RX RDS */
 671 u32 fm_rx_set_rds_mode(struct fmdev *fmdev, u8 rds_en_dis)
 672 {
 673         u16 payload;
 674         u32 ret;
 675
 676         if (rds_en_dis != FM_RDS_ENABLE && rds_en_dis != FM_RDS_DISABLE) {
 677                 fmerr("Invalid rds option\n");
 678                 return -EINVAL;
 679         }
 680
 681         if (rds_en_dis == FM_RDS_ENABLE
 682             && fmdev->rx.rds.flag == FM_RDS_DISABLE) {
 683                 /* Turn on RX RDS and RDS circuit */
 684                 payload = FM_RX_PWR_SET_FM_AND_RDS_BLK_ON;
 685                 ret = fmc_send_cmd(fmdev, POWER_SET, REG_WR, &payload,
 686                                 sizeof(payload), NULL, NULL);
 687                 if (ret < 0)
 688                         return ret;
 689
 690                 /* Clear and reset RDS FIFO */
 691                 payload = FM_RX_RDS_FLUSH_FIFO;
 692                 ret = fmc_send_cmd(fmdev, RDS_CNTRL_SET, REG_WR, &payload,
 693                 sizeof(payload), NULL, NULL);
 694                 if (ret < 0)
 695                         return ret;
 696
 697                 /* Read flags - just to clear any pending interrupts. */
 698                 ret = fmc_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, 2,
 699                                 NULL, NULL);
 700                 if (ret < 0)
 701                         return ret;
 702
 703                 /* Set RDS FIFO threshold value */
 704                 payload = FM_RX_RDS_FIFO_THRESHOLD;
 705                 ret = fmc_send_cmd(fmdev, RDS_MEM_SET, REG_WR, &payload,
 706                 sizeof(payload), NULL, NULL);
 707                 if (ret < 0)
 708                         return ret;
 709
 710                 /* Enable RDS interrupt */
 711                 fmdev->irq_info.mask |= FM_RDS_EVENT;
 712                 payload = fmdev->irq_info.mask;
 713                 ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
 714                                 sizeof(payload), NULL, NULL);
 715                 if (ret < 0) {
 716                         fmdev->irq_info.mask &= ~FM_RDS_EVENT;
 717                         return ret;
 718                 }
 719
 720                 /* Update our local flag */
 721                 fmdev->rx.rds.flag = FM_RDS_ENABLE;
 722         } else if (rds_en_dis == FM_RDS_DISABLE
 723                    && fmdev->rx.rds.flag == FM_RDS_ENABLE) {
 724                 /* Turn off RX RDS */
 725                 payload = FM_RX_PWR_SET_FM_ON_RDS_OFF;
 726                 ret = fmc_send_cmd(fmdev, POWER_SET, REG_WR, &payload,
 727                                 sizeof(payload), NULL, NULL);
 728                 if (ret < 0)
 729                         return ret;
 730
 731                 /* Reset RDS pointers */
 732                 fmdev->rx.rds.last_blk_idx = 0;
 733                 fmdev->rx.rds.wr_idx = 0;
 734                 fmdev->rx.rds.rd_idx = 0;
 735                 fm_rx_reset_station_info(fmdev);
 736
 737                 /* Update RDS local cache */
 738                 fmdev->irq_info.mask &= ~(FM_RDS_EVENT);
 739                 fmdev->rx.rds.flag = FM_RDS_DISABLE;
 740         }
 741
 742         return 0;
 743 }
 744
 745 /* Returns current RX RDS enable/disable status */
 746 u32 fm_rx_get_rds_mode(struct fmdev *fmdev, u8 *curr_rds_en_dis)
 747 {
 748         if (fmdev->curr_fmmode != FM_MODE_RX)
 749                 return -EPERM;
 750
 751         if (curr_rds_en_dis == NULL) {
 752                 fmerr("Invalid memory\n");
 753                 return -ENOMEM;
 754         }
 755
 756         *curr_rds_en_dis = fmdev->rx.rds.flag;
 757
 758         return 0;
 759 }
 760
 761 /* Sets RDS operation mode (RDS/RDBS) */
 762 u32 fm_rx_set_rds_system(struct fmdev *fmdev, u8 rds_mode)
 763 {
 764         u16 payload;
 765         u32 ret;
 766
 767         if (fmdev->curr_fmmode != FM_MODE_RX)
 768                 return -EPERM;
 769
 770         if (rds_mode != FM_RDS_SYSTEM_RDS && rds_mode != FM_RDS_SYSTEM_RBDS) {
 771                 fmerr("Invalid rds mode\n");
 772                 return -EINVAL;
 773         }
 774         /* Set RDS operation mode */
 775         payload = (u16)rds_mode;
 776         ret = fmc_send_cmd(fmdev, RDS_SYSTEM_SET, REG_WR, &payload,
 777                         sizeof(payload), NULL, NULL);
 778         if (ret < 0)
 779                 return ret;
 780
 781         fmdev->rx.rds_mode = rds_mode;
 782
 783         return 0;
 784 }
 785
 786 /* Returns current RDS operation mode */
 787 u32 fm_rx_get_rds_system(struct fmdev *fmdev, u8 *rds_mode)
 788 {
 789         if (fmdev->curr_fmmode != FM_MODE_RX)
 790                 return -EPERM;
 791
 792         if (rds_mode == NULL) {
 793                 fmerr("Invalid memory\n");
 794                 return -ENOMEM;
 795         }
 796
 797         *rds_mode = fmdev->rx.rds_mode;
 798
 799         return 0;
 800 }
 801
 802 /* Configures Alternate Frequency switch mode */
 803 u32 fm_rx_set_af_switch(struct fmdev *fmdev, u8 af_mode)
 804 {
 805         u16 payload;
 806         u32 ret;
 807
 808         if (fmdev->curr_fmmode != FM_MODE_RX)
 809                 return -EPERM;
 810
 811         if (af_mode != FM_RX_RDS_AF_SWITCH_MODE_ON &&
 812             af_mode != FM_RX_RDS_AF_SWITCH_MODE_OFF) {
 813                 fmerr("Invalid af mode\n");
 814                 return -EINVAL;
 815         }
 816         /* Enable/disable low RSSI interrupt based on af_mode */
 817         if (af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON)
 818                 fmdev->irq_info.mask |= FM_LEV_EVENT;
 819         else
 820                 fmdev->irq_info.mask &= ~FM_LEV_EVENT;
 821
 822         payload = fmdev->irq_info.mask;
 823         ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
 824                         sizeof(payload), NULL, NULL);
 825         if (ret < 0)
 826                 return ret;
 827
 828         fmdev->rx.af_mode = af_mode;
 829
 830         return 0;
 831 }
 832
 833 /* Returns Alternate Frequency switch status */
 834 u32 fm_rx_get_af_switch(struct fmdev *fmdev, u8 *af_mode)
 835 {
 836         if (fmdev->curr_fmmode != FM_MODE_RX)
 837                 return -EPERM;
 838
 839         if (af_mode == NULL) {
 840                 fmerr("Invalid memory\n");
 841                 return -ENOMEM;
 842         }
 843
 844         *af_mode = fmdev->rx.af_mode;
 845
 846         return 0;
 847 }