drivers/media/dvb/frontends/cxd2820r_core.c

   1 /*
   2  * Sony CXD2820R demodulator driver
   3  *
   4  * Copyright (C) 2010 Antti Palosaari <crope@iki.fi>
   5  *
   6  *    This program is free software; you can redistribute it and/or modify
   7  *    it under the terms of the GNU General Public License as published by
   8  *    the Free Software Foundation; either version 2 of the License, or
   9  *    (at your option) any later version.
  10  *
  11  *    This program is distributed in the hope that it will be useful,
  12  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *    GNU General Public License for more details.
  15  *
  16  *    You should have received a copy of the GNU General Public License along
  17  *    with this program; if not, write to the Free Software Foundation, Inc.,
  18  *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21
  22 #include "cxd2820r_priv.h"
  23
  24 int cxd2820r_debug;
  25 module_param_named(debug, cxd2820r_debug, int, 0644);
  26 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
  27
  28 /* write multiple registers */
  29 static int cxd2820r_wr_regs_i2c(struct cxd2820r_priv *priv, u8 i2c, u8 reg,
  30         u8 *val, int len)
  31 {
  32         int ret;
  33         u8 buf[len+1];
  34         struct i2c_msg msg[1] = {
  35                 {
  36                         .addr = i2c,
  37                         .flags = 0,
  38                         .len = sizeof(buf),
  39                         .buf = buf,
  40                 }
  41         };
  42
  43         buf[0] = reg;
  44         memcpy(&buf[1], val, len);
  45
  46         ret = i2c_transfer(priv->i2c, msg, 1);
  47         if (ret == 1) {
  48                 ret = 0;
  49         } else {
  50                 warn("i2c wr failed ret:%d reg:%02x len:%d", ret, reg, len);
  51                 ret = -EREMOTEIO;
  52         }
  53         return ret;
  54 }
  55
  56 /* read multiple registers */
  57 static int cxd2820r_rd_regs_i2c(struct cxd2820r_priv *priv, u8 i2c, u8 reg,
  58         u8 *val, int len)
  59 {
  60         int ret;
  61         u8 buf[len];
  62         struct i2c_msg msg[2] = {
  63                 {
  64                         .addr = i2c,
  65                         .flags = 0,
  66                         .len = 1,
  67                         .buf = &reg,
  68                 }, {
  69                         .addr = i2c,
  70                         .flags = I2C_M_RD,
  71                         .len = sizeof(buf),
  72                         .buf = buf,
  73                 }
  74         };
  75
  76         ret = i2c_transfer(priv->i2c, msg, 2);
  77         if (ret == 2) {
  78                 memcpy(val, buf, len);
  79                 ret = 0;
  80         } else {
  81                 warn("i2c rd failed ret:%d reg:%02x len:%d", ret, reg, len);
  82                 ret = -EREMOTEIO;
  83         }
  84
  85         return ret;
  86 }
  87
  88 /* write multiple registers */
  89 int cxd2820r_wr_regs(struct cxd2820r_priv *priv, u32 reginfo, u8 *val,
  90         int len)
  91 {
  92         int ret;
  93         u8 i2c_addr;
  94         u8 reg = (reginfo >> 0) & 0xff;
  95         u8 bank = (reginfo >> 8) & 0xff;
  96         u8 i2c = (reginfo >> 16) & 0x01;
  97
  98         /* select I2C */
  99         if (i2c)
 100                 i2c_addr = priv->cfg.i2c_address | (1 << 1); /* DVB-C */
 101         else
 102                 i2c_addr = priv->cfg.i2c_address; /* DVB-T/T2 */
 103
 104         /* switch bank if needed */
 105         if (bank != priv->bank[i2c]) {
 106                 ret = cxd2820r_wr_regs_i2c(priv, i2c_addr, 0x00, &bank, 1);
 107                 if (ret)
 108                         return ret;
 109                 priv->bank[i2c] = bank;
 110         }
 111         return cxd2820r_wr_regs_i2c(priv, i2c_addr, reg, val, len);
 112 }
 113
 114 /* read multiple registers */
 115 int cxd2820r_rd_regs(struct cxd2820r_priv *priv, u32 reginfo, u8 *val,
 116         int len)
 117 {
 118         int ret;
 119         u8 i2c_addr;
 120         u8 reg = (reginfo >> 0) & 0xff;
 121         u8 bank = (reginfo >> 8) & 0xff;
 122         u8 i2c = (reginfo >> 16) & 0x01;
 123
 124         /* select I2C */
 125         if (i2c)
 126                 i2c_addr = priv->cfg.i2c_address | (1 << 1); /* DVB-C */
 127         else
 128                 i2c_addr = priv->cfg.i2c_address; /* DVB-T/T2 */
 129
 130         /* switch bank if needed */
 131         if (bank != priv->bank[i2c]) {
 132                 ret = cxd2820r_wr_regs_i2c(priv, i2c_addr, 0x00, &bank, 1);
 133                 if (ret)
 134                         return ret;
 135                 priv->bank[i2c] = bank;
 136         }
 137         return cxd2820r_rd_regs_i2c(priv, i2c_addr, reg, val, len);
 138 }
 139
 140 /* write single register */
 141 int cxd2820r_wr_reg(struct cxd2820r_priv *priv, u32 reg, u8 val)
 142 {
 143         return cxd2820r_wr_regs(priv, reg, &val, 1);
 144 }
 145
 146 /* read single register */
 147 int cxd2820r_rd_reg(struct cxd2820r_priv *priv, u32 reg, u8 *val)
 148 {
 149         return cxd2820r_rd_regs(priv, reg, val, 1);
 150 }
 151
 152 /* write single register with mask */
 153 int cxd2820r_wr_reg_mask(struct cxd2820r_priv *priv, u32 reg, u8 val,
 154         u8 mask)
 155 {
 156         int ret;
 157         u8 tmp;
 158
 159         /* no need for read if whole reg is written */
 160         if (mask != 0xff) {
 161                 ret = cxd2820r_rd_reg(priv, reg, &tmp);
 162                 if (ret)
 163                         return ret;
 164
 165                 val &= mask;
 166                 tmp &= ~mask;
 167                 val |= tmp;
 168         }
 169
 170         return cxd2820r_wr_reg(priv, reg, val);
 171 }
 172
 173 int cxd2820r_gpio(struct dvb_frontend *fe)
 174 {
 175         struct cxd2820r_priv *priv = fe->demodulator_priv;
 176         int ret, i;
 177         u8 *gpio, tmp0, tmp1;
 178         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 179
 180         switch (fe->dtv_property_cache.delivery_system) {
 181         case SYS_DVBT:
 182                 gpio = priv->cfg.gpio_dvbt;
 183                 break;
 184         case SYS_DVBT2:
 185                 gpio = priv->cfg.gpio_dvbt2;
 186                 break;
 187         case SYS_DVBC_ANNEX_AC:
 188                 gpio = priv->cfg.gpio_dvbc;
 189                 break;
 190         default:
 191                 ret = -EINVAL;
 192                 goto error;
 193         }
 194
 195         /* update GPIOs only when needed */
 196         if (!memcmp(gpio, priv->gpio, sizeof(priv->gpio)))
 197                 return 0;
 198
 199         tmp0 = 0x00;
 200         tmp1 = 0x00;
 201         for (i = 0; i < sizeof(priv->gpio); i++) {
 202                 /* enable / disable */
 203                 if (gpio[i] & CXD2820R_GPIO_E)
 204                         tmp0 |= (2 << 6) >> (2 * i);
 205                 else
 206                         tmp0 |= (1 << 6) >> (2 * i);
 207
 208                 /* input / output */
 209                 if (gpio[i] & CXD2820R_GPIO_I)
 210                         tmp1 |= (1 << (3 + i));
 211                 else
 212                         tmp1 |= (0 << (3 + i));
 213
 214                 /* high / low */
 215                 if (gpio[i] & CXD2820R_GPIO_H)
 216                         tmp1 |= (1 << (0 + i));
 217                 else
 218                         tmp1 |= (0 << (0 + i));
 219
 220                 dbg("%s: GPIO i=%d %02x %02x", __func__, i, tmp0, tmp1);
 221         }
 222
 223         dbg("%s: wr gpio=%02x %02x", __func__, tmp0, tmp1);
 224
 225         /* write bits [7:2] */
 226         ret = cxd2820r_wr_reg_mask(priv, 0x00089, tmp0, 0xfc);
 227         if (ret)
 228                 goto error;
 229
 230         /* write bits [5:0] */
 231         ret = cxd2820r_wr_reg_mask(priv, 0x0008e, tmp1, 0x3f);
 232         if (ret)
 233                 goto error;
 234
 235         memcpy(priv->gpio, gpio, sizeof(priv->gpio));
 236
 237         return ret;
 238 error:
 239         dbg("%s: failed:%d", __func__, ret);
 240         return ret;
 241 }
 242
 243 /* lock FE */
 244 static int cxd2820r_lock(struct cxd2820r_priv *priv, int active_fe)
 245 {
 246         int ret = 0;
 247         dbg("%s: active_fe=%d", __func__, active_fe);
 248
 249         mutex_lock(&priv->fe_lock);
 250
 251         /* -1=NONE, 0=DVB-T/T2, 1=DVB-C */
 252         if (priv->active_fe == active_fe)
 253                 ;
 254         else if (priv->active_fe == -1)
 255                 priv->active_fe = active_fe;
 256         else
 257                 ret = -EBUSY;
 258
 259         mutex_unlock(&priv->fe_lock);
 260
 261         return ret;
 262 }
 263
 264 /* unlock FE */
 265 static void cxd2820r_unlock(struct cxd2820r_priv *priv, int active_fe)
 266 {
 267         dbg("%s: active_fe=%d", __func__, active_fe);
 268
 269         mutex_lock(&priv->fe_lock);
 270
 271         /* -1=NONE, 0=DVB-T/T2, 1=DVB-C */
 272         if (priv->active_fe == active_fe)
 273                 priv->active_fe = -1;
 274
 275         mutex_unlock(&priv->fe_lock);
 276
 277         return;
 278 }
 279
 280 /* 64 bit div with round closest, like DIV_ROUND_CLOSEST but 64 bit */
 281 u32 cxd2820r_div_u64_round_closest(u64 dividend, u32 divisor)
 282 {
 283         return div_u64(dividend + (divisor / 2), divisor);
 284 }
 285
 286 static int cxd2820r_set_frontend(struct dvb_frontend *fe,
 287         struct dvb_frontend_parameters *p)
 288 {
 289         struct cxd2820r_priv *priv = fe->demodulator_priv;
 290         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 291         int ret;
 292         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 293
 294         if (fe->ops.info.type == FE_OFDM) {
 295                 /* DVB-T/T2 */
 296                 ret = cxd2820r_lock(priv, 0);
 297                 if (ret)
 298                         return ret;
 299
 300                 switch (priv->delivery_system) {
 301                 case SYS_UNDEFINED:
 302                         if (c->delivery_system == SYS_DVBT) {
 303                                 /* SLEEP => DVB-T */
 304                                 ret = cxd2820r_set_frontend_t(fe, p);
 305                         } else {
 306                                 /* SLEEP => DVB-T2 */
 307                                 ret = cxd2820r_set_frontend_t2(fe, p);
 308                         }
 309                         break;
 310                 case SYS_DVBT:
 311                         if (c->delivery_system == SYS_DVBT) {
 312                                 /* DVB-T => DVB-T */
 313                                 ret = cxd2820r_set_frontend_t(fe, p);
 314                         } else if (c->delivery_system == SYS_DVBT2) {
 315                                 /* DVB-T => DVB-T2 */
 316                                 ret = cxd2820r_sleep_t(fe);
 317                                 if (ret)
 318                                         break;
 319                                 ret = cxd2820r_set_frontend_t2(fe, p);
 320                         }
 321                         break;
 322                 case SYS_DVBT2:
 323                         if (c->delivery_system == SYS_DVBT2) {
 324                                 /* DVB-T2 => DVB-T2 */
 325                                 ret = cxd2820r_set_frontend_t2(fe, p);
 326                         } else if (c->delivery_system == SYS_DVBT) {
 327                                 /* DVB-T2 => DVB-T */
 328                                 ret = cxd2820r_sleep_t2(fe);
 329                                 if (ret)
 330                                         break;
 331                                 ret = cxd2820r_set_frontend_t(fe, p);
 332                         }
 333                         break;
 334                 default:
 335                         dbg("%s: error state=%d", __func__,
 336                                 priv->delivery_system);
 337                         ret = -EINVAL;
 338                 }
 339         } else {
 340                 /* DVB-C */
 341                 ret = cxd2820r_lock(priv, 1);
 342                 if (ret)
 343                         return ret;
 344
 345                 ret = cxd2820r_set_frontend_c(fe, p);
 346         }
 347
 348         return ret;
 349 }
 350
 351 static int cxd2820r_read_status(struct dvb_frontend *fe, fe_status_t *status)
 352 {
 353         struct cxd2820r_priv *priv = fe->demodulator_priv;
 354         int ret;
 355         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 356
 357         if (fe->ops.info.type == FE_OFDM) {
 358                 /* DVB-T/T2 */
 359                 ret = cxd2820r_lock(priv, 0);
 360                 if (ret)
 361                         return ret;
 362
 363                 switch (fe->dtv_property_cache.delivery_system) {
 364                 case SYS_DVBT:
 365                         ret = cxd2820r_read_status_t(fe, status);
 366                         break;
 367                 case SYS_DVBT2:
 368                         ret = cxd2820r_read_status_t2(fe, status);
 369                         break;
 370                 default:
 371                         ret = -EINVAL;
 372                 }
 373         } else {
 374                 /* DVB-C */
 375                 ret = cxd2820r_lock(priv, 1);
 376                 if (ret)
 377                         return ret;
 378
 379                 ret = cxd2820r_read_status_c(fe, status);
 380         }
 381
 382         return ret;
 383 }
 384
 385 static int cxd2820r_get_frontend(struct dvb_frontend *fe,
 386         struct dvb_frontend_parameters *p)
 387 {
 388         struct cxd2820r_priv *priv = fe->demodulator_priv;
 389         int ret;
 390         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 391
 392         if (fe->ops.info.type == FE_OFDM) {
 393                 /* DVB-T/T2 */
 394                 ret = cxd2820r_lock(priv, 0);
 395                 if (ret)
 396                         return ret;
 397
 398                 switch (fe->dtv_property_cache.delivery_system) {
 399                 case SYS_DVBT:
 400                         ret = cxd2820r_get_frontend_t(fe, p);
 401                         break;
 402                 case SYS_DVBT2:
 403                         ret = cxd2820r_get_frontend_t2(fe, p);
 404                         break;
 405                 default:
 406                         ret = -EINVAL;
 407                 }
 408         } else {
 409                 /* DVB-C */
 410                 ret = cxd2820r_lock(priv, 1);
 411                 if (ret)
 412                         return ret;
 413
 414                 ret = cxd2820r_get_frontend_c(fe, p);
 415         }
 416
 417         return ret;
 418 }
 419
 420 static int cxd2820r_read_ber(struct dvb_frontend *fe, u32 *ber)
 421 {
 422         struct cxd2820r_priv *priv = fe->demodulator_priv;
 423         int ret;
 424         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 425
 426         if (fe->ops.info.type == FE_OFDM) {
 427                 /* DVB-T/T2 */
 428                 ret = cxd2820r_lock(priv, 0);
 429                 if (ret)
 430                         return ret;
 431
 432                 switch (fe->dtv_property_cache.delivery_system) {
 433                 case SYS_DVBT:
 434                         ret = cxd2820r_read_ber_t(fe, ber);
 435                         break;
 436                 case SYS_DVBT2:
 437                         ret = cxd2820r_read_ber_t2(fe, ber);
 438                         break;
 439                 default:
 440                         ret = -EINVAL;
 441                 }
 442         } else {
 443                 /* DVB-C */
 444                 ret = cxd2820r_lock(priv, 1);
 445                 if (ret)
 446                         return ret;
 447
 448                 ret = cxd2820r_read_ber_c(fe, ber);
 449         }
 450
 451         return ret;
 452 }
 453
 454 static int cxd2820r_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
 455 {
 456         struct cxd2820r_priv *priv = fe->demodulator_priv;
 457         int ret;
 458         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 459
 460         if (fe->ops.info.type == FE_OFDM) {
 461                 /* DVB-T/T2 */
 462                 ret = cxd2820r_lock(priv, 0);
 463                 if (ret)
 464                         return ret;
 465
 466                 switch (fe->dtv_property_cache.delivery_system) {
 467                 case SYS_DVBT:
 468                         ret = cxd2820r_read_signal_strength_t(fe, strength);
 469                         break;
 470                 case SYS_DVBT2:
 471                         ret = cxd2820r_read_signal_strength_t2(fe, strength);
 472                         break;
 473                 default:
 474                         ret = -EINVAL;
 475                 }
 476         } else {
 477                 /* DVB-C */
 478                 ret = cxd2820r_lock(priv, 1);
 479                 if (ret)
 480                         return ret;
 481
 482                 ret = cxd2820r_read_signal_strength_c(fe, strength);
 483         }
 484
 485         return ret;
 486 }
 487
 488 static int cxd2820r_read_snr(struct dvb_frontend *fe, u16 *snr)
 489 {
 490         struct cxd2820r_priv *priv = fe->demodulator_priv;
 491         int ret;
 492         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 493
 494         if (fe->ops.info.type == FE_OFDM) {
 495                 /* DVB-T/T2 */
 496                 ret = cxd2820r_lock(priv, 0);
 497                 if (ret)
 498                         return ret;
 499
 500                 switch (fe->dtv_property_cache.delivery_system) {
 501                 case SYS_DVBT:
 502                         ret = cxd2820r_read_snr_t(fe, snr);
 503                         break;
 504                 case SYS_DVBT2:
 505                         ret = cxd2820r_read_snr_t2(fe, snr);
 506                         break;
 507                 default:
 508                         ret = -EINVAL;
 509                 }
 510         } else {
 511                 /* DVB-C */
 512                 ret = cxd2820r_lock(priv, 1);
 513                 if (ret)
 514                         return ret;
 515
 516                 ret = cxd2820r_read_snr_c(fe, snr);
 517         }
 518
 519         return ret;
 520 }
 521
 522 static int cxd2820r_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
 523 {
 524         struct cxd2820r_priv *priv = fe->demodulator_priv;
 525         int ret;
 526         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 527
 528         if (fe->ops.info.type == FE_OFDM) {
 529                 /* DVB-T/T2 */
 530                 ret = cxd2820r_lock(priv, 0);
 531                 if (ret)
 532                         return ret;
 533
 534                 switch (fe->dtv_property_cache.delivery_system) {
 535                 case SYS_DVBT:
 536                         ret = cxd2820r_read_ucblocks_t(fe, ucblocks);
 537                         break;
 538                 case SYS_DVBT2:
 539                         ret = cxd2820r_read_ucblocks_t2(fe, ucblocks);
 540                         break;
 541                 default:
 542                         ret = -EINVAL;
 543                 }
 544         } else {
 545                 /* DVB-C */
 546                 ret = cxd2820r_lock(priv, 1);
 547                 if (ret)
 548                         return ret;
 549
 550                 ret = cxd2820r_read_ucblocks_c(fe, ucblocks);
 551         }
 552
 553         return ret;
 554 }
 555
 556 static int cxd2820r_init(struct dvb_frontend *fe)
 557 {
 558         struct cxd2820r_priv *priv = fe->demodulator_priv;
 559         int ret;
 560         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 561
 562         priv->delivery_system = SYS_UNDEFINED;
 563         /* delivery system is unknown at that (init) phase */
 564
 565         if (fe->ops.info.type == FE_OFDM) {
 566                 /* DVB-T/T2 */
 567                 ret = cxd2820r_lock(priv, 0);
 568                 if (ret)
 569                         return ret;
 570
 571                 ret = cxd2820r_init_t(fe);
 572         } else {
 573                 /* DVB-C */
 574                 ret = cxd2820r_lock(priv, 1);
 575                 if (ret)
 576                         return ret;
 577
 578                 ret = cxd2820r_init_c(fe);
 579         }
 580
 581         return ret;
 582 }
 583
 584 static int cxd2820r_sleep(struct dvb_frontend *fe)
 585 {
 586         struct cxd2820r_priv *priv = fe->demodulator_priv;
 587         int ret;
 588         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 589
 590         if (fe->ops.info.type == FE_OFDM) {
 591                 /* DVB-T/T2 */
 592                 ret = cxd2820r_lock(priv, 0);
 593                 if (ret)
 594                         return ret;
 595
 596                 switch (fe->dtv_property_cache.delivery_system) {
 597                 case SYS_DVBT:
 598                         ret = cxd2820r_sleep_t(fe);
 599                         break;
 600                 case SYS_DVBT2:
 601                         ret = cxd2820r_sleep_t2(fe);
 602                         break;
 603                 default:
 604                         ret = -EINVAL;
 605                 }
 606
 607                 cxd2820r_unlock(priv, 0);
 608         } else {
 609                 /* DVB-C */
 610                 ret = cxd2820r_lock(priv, 1);
 611                 if (ret)
 612                         return ret;
 613
 614                 ret = cxd2820r_sleep_c(fe);
 615
 616                 cxd2820r_unlock(priv, 1);
 617         }
 618
 619         return ret;
 620 }
 621
 622 static int cxd2820r_get_tune_settings(struct dvb_frontend *fe,
 623         struct dvb_frontend_tune_settings *s)
 624 {
 625         struct cxd2820r_priv *priv = fe->demodulator_priv;
 626         int ret;
 627         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 628
 629         if (fe->ops.info.type == FE_OFDM) {
 630                 /* DVB-T/T2 */
 631                 ret = cxd2820r_lock(priv, 0);
 632                 if (ret)
 633                         return ret;
 634
 635                 switch (fe->dtv_property_cache.delivery_system) {
 636                 case SYS_DVBT:
 637                         ret = cxd2820r_get_tune_settings_t(fe, s);
 638                         break;
 639                 case SYS_DVBT2:
 640                         ret = cxd2820r_get_tune_settings_t2(fe, s);
 641                         break;
 642                 default:
 643                         ret = -EINVAL;
 644                 }
 645         } else {
 646                 /* DVB-C */
 647                 ret = cxd2820r_lock(priv, 1);
 648                 if (ret)
 649                         return ret;
 650
 651                 ret = cxd2820r_get_tune_settings_c(fe, s);
 652         }
 653
 654         return ret;
 655 }
 656
 657 static enum dvbfe_search cxd2820r_search(struct dvb_frontend *fe,
 658         struct dvb_frontend_parameters *p)
 659 {
 660         struct cxd2820r_priv *priv = fe->demodulator_priv;
 661         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 662         int ret, i;
 663         fe_status_t status = 0;
 664         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 665
 666         /* switch between DVB-T and DVB-T2 when tune fails */
 667         if (priv->last_tune_failed) {
 668                 if (priv->delivery_system == SYS_DVBT)
 669                         c->delivery_system = SYS_DVBT2;
 670                 else
 671                         c->delivery_system = SYS_DVBT;
 672         }
 673
 674         /* set frontend */
 675         ret = cxd2820r_set_frontend(fe, p);
 676         if (ret)
 677                 goto error;
 678
 679
 680         /* frontend lock wait loop count */
 681         switch (priv->delivery_system) {
 682         case SYS_DVBT:
 683                 i = 20;
 684                 break;
 685         case SYS_DVBT2:
 686                 i = 40;
 687                 break;
 688         case SYS_UNDEFINED:
 689         default:
 690                 i = 0;
 691                 break;
 692         }
 693
 694         /* wait frontend lock */
 695         for (; i > 0; i--) {
 696                 dbg("%s: LOOP=%d", __func__, i);
 697                 msleep(50);
 698                 ret = cxd2820r_read_status(fe, &status);
 699                 if (ret)
 700                         goto error;
 701
 702                 if (status & FE_HAS_SIGNAL)
 703                         break;
 704         }
 705
 706         /* check if we have a valid signal */
 707         if (status) {
 708                 priv->last_tune_failed = 0;
 709                 return DVBFE_ALGO_SEARCH_SUCCESS;
 710         } else {
 711                 priv->last_tune_failed = 1;
 712                 return DVBFE_ALGO_SEARCH_AGAIN;
 713         }
 714
 715 error:
 716         dbg("%s: failed:%d", __func__, ret);
 717         return DVBFE_ALGO_SEARCH_ERROR;
 718 }
 719
 720 static int cxd2820r_get_frontend_algo(struct dvb_frontend *fe)
 721 {
 722         return DVBFE_ALGO_CUSTOM;
 723 }
 724
 725 static void cxd2820r_release(struct dvb_frontend *fe)
 726 {
 727         struct cxd2820r_priv *priv = fe->demodulator_priv;
 728         dbg("%s", __func__);
 729
 730         if (fe->ops.info.type == FE_OFDM)
 731                 kfree(priv);
 732
 733         return;
 734 }
 735
 736 static int cxd2820r_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
 737 {
 738         struct cxd2820r_priv *priv = fe->demodulator_priv;
 739         dbg("%s: %d", __func__, enable);
 740
 741         /* Bit 0 of reg 0xdb in bank 0x00 controls I2C repeater */
 742         return cxd2820r_wr_reg_mask(priv, 0xdb, enable ? 1 : 0, 0x1);
 743 }
 744
 745 static const struct dvb_frontend_ops cxd2820r_ops[2];
 746
 747 struct dvb_frontend *cxd2820r_attach(const struct cxd2820r_config *cfg,
 748         struct i2c_adapter *i2c, struct dvb_frontend *fe)
 749 {
 750         int ret;
 751         struct cxd2820r_priv *priv = NULL;
 752         u8 tmp;
 753
 754         if (fe == NULL) {
 755                 /* FE0 */
 756                 /* allocate memory for the internal priv */
 757                 priv = kzalloc(sizeof(struct cxd2820r_priv), GFP_KERNEL);
 758                 if (priv == NULL)
 759                         goto error;
 760
 761                 /* setup the priv */
 762                 priv->i2c = i2c;
 763                 memcpy(&priv->cfg, cfg, sizeof(struct cxd2820r_config));
 764                 mutex_init(&priv->fe_lock);
 765
 766                 priv->active_fe = -1; /* NONE */
 767
 768                 /* check if the demod is there */
 769                 priv->bank[0] = priv->bank[1] = 0xff;
 770                 ret = cxd2820r_rd_reg(priv, 0x000fd, &tmp);
 771                 dbg("%s: chip id=%02x", __func__, tmp);
 772                 if (ret || tmp != 0xe1)
 773                         goto error;
 774
 775                 /* create frontends */
 776                 memcpy(&priv->fe[0].ops, &cxd2820r_ops[0],
 777                         sizeof(struct dvb_frontend_ops));
 778                 memcpy(&priv->fe[1].ops, &cxd2820r_ops[1],
 779                         sizeof(struct dvb_frontend_ops));
 780
 781                 priv->fe[0].demodulator_priv = priv;
 782                 priv->fe[1].demodulator_priv = priv;
 783
 784                 return &priv->fe[0];
 785
 786         } else {
 787                 /* FE1: FE0 given as pointer, just return FE1 we have
 788                  * already created */
 789                 priv = fe->demodulator_priv;
 790                 return &priv->fe[1];
 791         }
 792
 793 error:
 794         kfree(priv);
 795         return NULL;
 796 }
 797 EXPORT_SYMBOL(cxd2820r_attach);
 798
 799 static const struct dvb_frontend_ops cxd2820r_ops[2] = {
 800         {
 801                 /* DVB-T/T2 */
 802                 .info = {
 803                         .name = "Sony CXD2820R (DVB-T/T2)",
 804                         .type = FE_OFDM,
 805                         .caps =
 806                                 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 |
 807                                 FE_CAN_FEC_3_4 | FE_CAN_FEC_5_6 |
 808                                 FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 809                                 FE_CAN_QPSK | FE_CAN_QAM_16 |
 810                                 FE_CAN_QAM_64 | FE_CAN_QAM_256 |
 811                                 FE_CAN_QAM_AUTO |
 812                                 FE_CAN_TRANSMISSION_MODE_AUTO |
 813                                 FE_CAN_GUARD_INTERVAL_AUTO |
 814                                 FE_CAN_HIERARCHY_AUTO |
 815                                 FE_CAN_MUTE_TS |
 816                                 FE_CAN_2G_MODULATION
 817                 },
 818
 819                 .release = cxd2820r_release,
 820                 .init = cxd2820r_init,
 821                 .sleep = cxd2820r_sleep,
 822
 823                 .get_tune_settings = cxd2820r_get_tune_settings,
 824                 .i2c_gate_ctrl = cxd2820r_i2c_gate_ctrl,
 825
 826                 .get_frontend = cxd2820r_get_frontend,
 827
 828                 .get_frontend_algo = cxd2820r_get_frontend_algo,
 829                 .search = cxd2820r_search,
 830
 831                 .read_status = cxd2820r_read_status,
 832                 .read_snr = cxd2820r_read_snr,
 833                 .read_ber = cxd2820r_read_ber,
 834                 .read_ucblocks = cxd2820r_read_ucblocks,
 835                 .read_signal_strength = cxd2820r_read_signal_strength,
 836         },
 837         {
 838                 /* DVB-C */
 839                 .info = {
 840                         .name = "Sony CXD2820R (DVB-C)",
 841                         .type = FE_QAM,
 842                         .caps =
 843                                 FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
 844                                 FE_CAN_QAM_128 | FE_CAN_QAM_256 |
 845                                 FE_CAN_FEC_AUTO
 846                 },
 847
 848                 .release = cxd2820r_release,
 849                 .init = cxd2820r_init,
 850                 .sleep = cxd2820r_sleep,
 851
 852                 .get_tune_settings = cxd2820r_get_tune_settings,
 853                 .i2c_gate_ctrl = cxd2820r_i2c_gate_ctrl,
 854
 855                 .set_frontend = cxd2820r_set_frontend,
 856                 .get_frontend = cxd2820r_get_frontend,
 857
 858                 .read_status = cxd2820r_read_status,
 859                 .read_snr = cxd2820r_read_snr,
 860                 .read_ber = cxd2820r_read_ber,
 861                 .read_ucblocks = cxd2820r_read_ucblocks,
 862                 .read_signal_strength = cxd2820r_read_signal_strength,
 863         },
 864 };
 865
 866
 867 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 868 MODULE_DESCRIPTION("Sony CXD2820R demodulator driver");
 869 MODULE_LICENSE("GPL");