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                                 ret = cxd2820r_set_frontend_t2(fe, p);
 318                         }
 319                         break;
 320                 case SYS_DVBT2:
 321                         if (c->delivery_system == SYS_DVBT2) {
 322                                 /* DVB-T2 => DVB-T2 */
 323                                 ret = cxd2820r_set_frontend_t2(fe, p);
 324                         } else if (c->delivery_system == SYS_DVBT) {
 325                                 /* DVB-T2 => DVB-T */
 326                                 ret = cxd2820r_sleep_t2(fe);
 327                                 ret = cxd2820r_set_frontend_t(fe, p);
 328                         }
 329                         break;
 330                 default:
 331                         dbg("%s: error state=%d", __func__,
 332                                 priv->delivery_system);
 333                         ret = -EINVAL;
 334                 }
 335         } else {
 336                 /* DVB-C */
 337                 ret = cxd2820r_lock(priv, 1);
 338                 if (ret)
 339                         return ret;
 340
 341                 ret = cxd2820r_set_frontend_c(fe, p);
 342         }
 343
 344         return ret;
 345 }
 346
 347 static int cxd2820r_read_status(struct dvb_frontend *fe, fe_status_t *status)
 348 {
 349         struct cxd2820r_priv *priv = fe->demodulator_priv;
 350         int ret;
 351         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 352
 353         if (fe->ops.info.type == FE_OFDM) {
 354                 /* DVB-T/T2 */
 355                 ret = cxd2820r_lock(priv, 0);
 356                 if (ret)
 357                         return ret;
 358
 359                 switch (fe->dtv_property_cache.delivery_system) {
 360                 case SYS_DVBT:
 361                         ret = cxd2820r_read_status_t(fe, status);
 362                         break;
 363                 case SYS_DVBT2:
 364                         ret = cxd2820r_read_status_t2(fe, status);
 365                         break;
 366                 default:
 367                         ret = -EINVAL;
 368                 }
 369         } else {
 370                 /* DVB-C */
 371                 ret = cxd2820r_lock(priv, 1);
 372                 if (ret)
 373                         return ret;
 374
 375                 ret = cxd2820r_read_status_c(fe, status);
 376         }
 377
 378         return ret;
 379 }
 380
 381 static int cxd2820r_get_frontend(struct dvb_frontend *fe,
 382         struct dvb_frontend_parameters *p)
 383 {
 384         struct cxd2820r_priv *priv = fe->demodulator_priv;
 385         int ret;
 386         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 387
 388         if (fe->ops.info.type == FE_OFDM) {
 389                 /* DVB-T/T2 */
 390                 ret = cxd2820r_lock(priv, 0);
 391                 if (ret)
 392                         return ret;
 393
 394                 switch (fe->dtv_property_cache.delivery_system) {
 395                 case SYS_DVBT:
 396                         ret = cxd2820r_get_frontend_t(fe, p);
 397                         break;
 398                 case SYS_DVBT2:
 399                         ret = cxd2820r_get_frontend_t2(fe, p);
 400                         break;
 401                 default:
 402                         ret = -EINVAL;
 403                 }
 404         } else {
 405                 /* DVB-C */
 406                 ret = cxd2820r_lock(priv, 1);
 407                 if (ret)
 408                         return ret;
 409
 410                 ret = cxd2820r_get_frontend_c(fe, p);
 411         }
 412
 413         return ret;
 414 }
 415
 416 static int cxd2820r_read_ber(struct dvb_frontend *fe, u32 *ber)
 417 {
 418         struct cxd2820r_priv *priv = fe->demodulator_priv;
 419         int ret;
 420         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 421
 422         if (fe->ops.info.type == FE_OFDM) {
 423                 /* DVB-T/T2 */
 424                 ret = cxd2820r_lock(priv, 0);
 425                 if (ret)
 426                         return ret;
 427
 428                 switch (fe->dtv_property_cache.delivery_system) {
 429                 case SYS_DVBT:
 430                         ret = cxd2820r_read_ber_t(fe, ber);
 431                         break;
 432                 case SYS_DVBT2:
 433                         ret = cxd2820r_read_ber_t2(fe, ber);
 434                         break;
 435                 default:
 436                         ret = -EINVAL;
 437                 }
 438         } else {
 439                 /* DVB-C */
 440                 ret = cxd2820r_lock(priv, 1);
 441                 if (ret)
 442                         return ret;
 443
 444                 ret = cxd2820r_read_ber_c(fe, ber);
 445         }
 446
 447         return ret;
 448 }
 449
 450 static int cxd2820r_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
 451 {
 452         struct cxd2820r_priv *priv = fe->demodulator_priv;
 453         int ret;
 454         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 455
 456         if (fe->ops.info.type == FE_OFDM) {
 457                 /* DVB-T/T2 */
 458                 ret = cxd2820r_lock(priv, 0);
 459                 if (ret)
 460                         return ret;
 461
 462                 switch (fe->dtv_property_cache.delivery_system) {
 463                 case SYS_DVBT:
 464                         ret = cxd2820r_read_signal_strength_t(fe, strength);
 465                         break;
 466                 case SYS_DVBT2:
 467                         ret = cxd2820r_read_signal_strength_t2(fe, strength);
 468                         break;
 469                 default:
 470                         ret = -EINVAL;
 471                 }
 472         } else {
 473                 /* DVB-C */
 474                 ret = cxd2820r_lock(priv, 1);
 475                 if (ret)
 476                         return ret;
 477
 478                 ret = cxd2820r_read_signal_strength_c(fe, strength);
 479         }
 480
 481         return ret;
 482 }
 483
 484 static int cxd2820r_read_snr(struct dvb_frontend *fe, u16 *snr)
 485 {
 486         struct cxd2820r_priv *priv = fe->demodulator_priv;
 487         int ret;
 488         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 489
 490         if (fe->ops.info.type == FE_OFDM) {
 491                 /* DVB-T/T2 */
 492                 ret = cxd2820r_lock(priv, 0);
 493                 if (ret)
 494                         return ret;
 495
 496                 switch (fe->dtv_property_cache.delivery_system) {
 497                 case SYS_DVBT:
 498                         ret = cxd2820r_read_snr_t(fe, snr);
 499                         break;
 500                 case SYS_DVBT2:
 501                         ret = cxd2820r_read_snr_t2(fe, snr);
 502                         break;
 503                 default:
 504                         ret = -EINVAL;
 505                 }
 506         } else {
 507                 /* DVB-C */
 508                 ret = cxd2820r_lock(priv, 1);
 509                 if (ret)
 510                         return ret;
 511
 512                 ret = cxd2820r_read_snr_c(fe, snr);
 513         }
 514
 515         return ret;
 516 }
 517
 518 static int cxd2820r_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
 519 {
 520         struct cxd2820r_priv *priv = fe->demodulator_priv;
 521         int ret;
 522         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 523
 524         if (fe->ops.info.type == FE_OFDM) {
 525                 /* DVB-T/T2 */
 526                 ret = cxd2820r_lock(priv, 0);
 527                 if (ret)
 528                         return ret;
 529
 530                 switch (fe->dtv_property_cache.delivery_system) {
 531                 case SYS_DVBT:
 532                         ret = cxd2820r_read_ucblocks_t(fe, ucblocks);
 533                         break;
 534                 case SYS_DVBT2:
 535                         ret = cxd2820r_read_ucblocks_t2(fe, ucblocks);
 536                         break;
 537                 default:
 538                         ret = -EINVAL;
 539                 }
 540         } else {
 541                 /* DVB-C */
 542                 ret = cxd2820r_lock(priv, 1);
 543                 if (ret)
 544                         return ret;
 545
 546                 ret = cxd2820r_read_ucblocks_c(fe, ucblocks);
 547         }
 548
 549         return ret;
 550 }
 551
 552 static int cxd2820r_init(struct dvb_frontend *fe)
 553 {
 554         struct cxd2820r_priv *priv = fe->demodulator_priv;
 555         int ret;
 556         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 557
 558         priv->delivery_system = SYS_UNDEFINED;
 559         /* delivery system is unknown at that (init) phase */
 560
 561         if (fe->ops.info.type == FE_OFDM) {
 562                 /* DVB-T/T2 */
 563                 ret = cxd2820r_lock(priv, 0);
 564                 if (ret)
 565                         return ret;
 566
 567                 ret = cxd2820r_init_t(fe);
 568         } else {
 569                 /* DVB-C */
 570                 ret = cxd2820r_lock(priv, 1);
 571                 if (ret)
 572                         return ret;
 573
 574                 ret = cxd2820r_init_c(fe);
 575         }
 576
 577         return ret;
 578 }
 579
 580 static int cxd2820r_sleep(struct dvb_frontend *fe)
 581 {
 582         struct cxd2820r_priv *priv = fe->demodulator_priv;
 583         int ret;
 584         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 585
 586         if (fe->ops.info.type == FE_OFDM) {
 587                 /* DVB-T/T2 */
 588                 ret = cxd2820r_lock(priv, 0);
 589                 if (ret)
 590                         return ret;
 591
 592                 switch (fe->dtv_property_cache.delivery_system) {
 593                 case SYS_DVBT:
 594                         ret = cxd2820r_sleep_t(fe);
 595                         break;
 596                 case SYS_DVBT2:
 597                         ret = cxd2820r_sleep_t2(fe);
 598                         break;
 599                 default:
 600                         ret = -EINVAL;
 601                 }
 602
 603                 cxd2820r_unlock(priv, 0);
 604         } else {
 605                 /* DVB-C */
 606                 ret = cxd2820r_lock(priv, 1);
 607                 if (ret)
 608                         return ret;
 609
 610                 ret = cxd2820r_sleep_c(fe);
 611
 612                 cxd2820r_unlock(priv, 1);
 613         }
 614
 615         return ret;
 616 }
 617
 618 static int cxd2820r_get_tune_settings(struct dvb_frontend *fe,
 619         struct dvb_frontend_tune_settings *s)
 620 {
 621         struct cxd2820r_priv *priv = fe->demodulator_priv;
 622         int ret;
 623         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 624
 625         if (fe->ops.info.type == FE_OFDM) {
 626                 /* DVB-T/T2 */
 627                 ret = cxd2820r_lock(priv, 0);
 628                 if (ret)
 629                         return ret;
 630
 631                 switch (fe->dtv_property_cache.delivery_system) {
 632                 case SYS_DVBT:
 633                         ret = cxd2820r_get_tune_settings_t(fe, s);
 634                         break;
 635                 case SYS_DVBT2:
 636                         ret = cxd2820r_get_tune_settings_t2(fe, s);
 637                         break;
 638                 default:
 639                         ret = -EINVAL;
 640                 }
 641         } else {
 642                 /* DVB-C */
 643                 ret = cxd2820r_lock(priv, 1);
 644                 if (ret)
 645                         return ret;
 646
 647                 ret = cxd2820r_get_tune_settings_c(fe, s);
 648         }
 649
 650         return ret;
 651 }
 652
 653 static enum dvbfe_search cxd2820r_search(struct dvb_frontend *fe,
 654         struct dvb_frontend_parameters *p)
 655 {
 656         struct cxd2820r_priv *priv = fe->demodulator_priv;
 657         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 658         int ret, i;
 659         fe_status_t status = 0;
 660         dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
 661
 662         /* switch between DVB-T and DVB-T2 when tune fails */
 663         if (priv->last_tune_failed) {
 664                 if (priv->delivery_system == SYS_DVBT)
 665                         c->delivery_system = SYS_DVBT2;
 666                 else
 667                         c->delivery_system = SYS_DVBT;
 668         }
 669
 670         /* set frontend */
 671         ret = cxd2820r_set_frontend(fe, p);
 672         if (ret)
 673                 goto error;
 674
 675
 676         /* frontend lock wait loop count */
 677         switch (priv->delivery_system) {
 678         case SYS_DVBT:
 679                 i = 20;
 680                 break;
 681         case SYS_DVBT2:
 682                 i = 40;
 683                 break;
 684         case SYS_UNDEFINED:
 685         default:
 686                 i = 0;
 687                 break;
 688         }
 689
 690         /* wait frontend lock */
 691         for (; i > 0; i--) {
 692                 dbg("%s: LOOP=%d", __func__, i);
 693                 msleep(50);
 694                 ret = cxd2820r_read_status(fe, &status);
 695                 if (ret)
 696                         goto error;
 697
 698                 if (status & FE_HAS_SIGNAL)
 699                         break;
 700         }
 701
 702         /* check if we have a valid signal */
 703         if (status) {
 704                 priv->last_tune_failed = 0;
 705                 return DVBFE_ALGO_SEARCH_SUCCESS;
 706         } else {
 707                 priv->last_tune_failed = 1;
 708                 return DVBFE_ALGO_SEARCH_AGAIN;
 709         }
 710
 711 error:
 712         dbg("%s: failed:%d", __func__, ret);
 713         return DVBFE_ALGO_SEARCH_ERROR;
 714 }
 715
 716 static int cxd2820r_get_frontend_algo(struct dvb_frontend *fe)
 717 {
 718         return DVBFE_ALGO_CUSTOM;
 719 }
 720
 721 static void cxd2820r_release(struct dvb_frontend *fe)
 722 {
 723         struct cxd2820r_priv *priv = fe->demodulator_priv;
 724         dbg("%s", __func__);
 725
 726         if (fe->ops.info.type == FE_OFDM) {
 727                 i2c_del_adapter(&priv->tuner_i2c_adapter);
 728                 kfree(priv);
 729         }
 730
 731         return;
 732 }
 733
 734 static u32 cxd2820r_tuner_i2c_func(struct i2c_adapter *adapter)
 735 {
 736         return I2C_FUNC_I2C;
 737 }
 738
 739 static int cxd2820r_tuner_i2c_xfer(struct i2c_adapter *i2c_adap,
 740         struct i2c_msg msg[], int num)
 741 {
 742         struct cxd2820r_priv *priv = i2c_get_adapdata(i2c_adap);
 743         u8 obuf[msg[0].len + 2];
 744         struct i2c_msg msg2[2] = {
 745                 {
 746                         .addr = priv->cfg.i2c_address,
 747                         .flags = 0,
 748                         .len = sizeof(obuf),
 749                         .buf = obuf,
 750                 }, {
 751                         .addr = priv->cfg.i2c_address,
 752                         .flags = I2C_M_RD,
 753                         .len = msg[1].len,
 754                         .buf = msg[1].buf,
 755                 }
 756         };
 757
 758         obuf[0] = 0x09;
 759         obuf[1] = (msg[0].addr << 1);
 760         if (num == 2) { /* I2C read */
 761                 obuf[1] = (msg[0].addr << 1) | I2C_M_RD; /* I2C RD flag */
 762                 msg2[0].len = sizeof(obuf) - 1; /* maybe HW bug ? */
 763         }
 764         memcpy(&obuf[2], msg[0].buf, msg[0].len);
 765
 766         return i2c_transfer(priv->i2c, msg2, num);
 767 }
 768
 769 static struct i2c_algorithm cxd2820r_tuner_i2c_algo = {
 770         .master_xfer   = cxd2820r_tuner_i2c_xfer,
 771         .functionality = cxd2820r_tuner_i2c_func,
 772 };
 773
 774 struct i2c_adapter *cxd2820r_get_tuner_i2c_adapter(struct dvb_frontend *fe)
 775 {
 776         struct cxd2820r_priv *priv = fe->demodulator_priv;
 777         return &priv->tuner_i2c_adapter;
 778 }
 779 EXPORT_SYMBOL(cxd2820r_get_tuner_i2c_adapter);
 780
 781 static struct dvb_frontend_ops cxd2820r_ops[2];
 782
 783 struct dvb_frontend *cxd2820r_attach(const struct cxd2820r_config *cfg,
 784         struct i2c_adapter *i2c, struct dvb_frontend *fe)
 785 {
 786         int ret;
 787         struct cxd2820r_priv *priv = NULL;
 788         u8 tmp;
 789
 790         if (fe == NULL) {
 791                 /* FE0 */
 792                 /* allocate memory for the internal priv */
 793                 priv = kzalloc(sizeof(struct cxd2820r_priv), GFP_KERNEL);
 794                 if (priv == NULL)
 795                         goto error;
 796
 797                 /* setup the priv */
 798                 priv->i2c = i2c;
 799                 memcpy(&priv->cfg, cfg, sizeof(struct cxd2820r_config));
 800                 mutex_init(&priv->fe_lock);
 801
 802                 priv->active_fe = -1; /* NONE */
 803
 804                 /* check if the demod is there */
 805                 priv->bank[0] = priv->bank[1] = 0xff;
 806                 ret = cxd2820r_rd_reg(priv, 0x000fd, &tmp);
 807                 dbg("%s: chip id=%02x", __func__, tmp);
 808                 if (ret || tmp != 0xe1)
 809                         goto error;
 810
 811                 /* create frontends */
 812                 memcpy(&priv->fe[0].ops, &cxd2820r_ops[0],
 813                         sizeof(struct dvb_frontend_ops));
 814                 memcpy(&priv->fe[1].ops, &cxd2820r_ops[1],
 815                         sizeof(struct dvb_frontend_ops));
 816
 817                 priv->fe[0].demodulator_priv = priv;
 818                 priv->fe[1].demodulator_priv = priv;
 819
 820                 /* create tuner i2c adapter */
 821                 strlcpy(priv->tuner_i2c_adapter.name,
 822                         "CXD2820R tuner I2C adapter",
 823                         sizeof(priv->tuner_i2c_adapter.name));
 824                 priv->tuner_i2c_adapter.algo = &cxd2820r_tuner_i2c_algo;
 825                 priv->tuner_i2c_adapter.algo_data = NULL;
 826                 i2c_set_adapdata(&priv->tuner_i2c_adapter, priv);
 827                 if (i2c_add_adapter(&priv->tuner_i2c_adapter) < 0) {
 828                         err("tuner I2C bus could not be initialized");
 829                         goto error;
 830                 }
 831
 832                 return &priv->fe[0];
 833
 834         } else {
 835                 /* FE1: FE0 given as pointer, just return FE1 we have
 836                  * already created */
 837                 priv = fe->demodulator_priv;
 838                 return &priv->fe[1];
 839         }
 840
 841 error:
 842         kfree(priv);
 843         return NULL;
 844 }
 845 EXPORT_SYMBOL(cxd2820r_attach);
 846
 847 static struct dvb_frontend_ops cxd2820r_ops[2] = {
 848         {
 849                 /* DVB-T/T2 */
 850                 .info = {
 851                         .name = "Sony CXD2820R (DVB-T/T2)",
 852                         .type = FE_OFDM,
 853                         .caps =
 854                                 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 |
 855                                 FE_CAN_FEC_3_4 | FE_CAN_FEC_5_6 |
 856                                 FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 857                                 FE_CAN_QPSK | FE_CAN_QAM_16 |
 858                                 FE_CAN_QAM_64 | FE_CAN_QAM_256 |
 859                                 FE_CAN_QAM_AUTO |
 860                                 FE_CAN_TRANSMISSION_MODE_AUTO |
 861                                 FE_CAN_GUARD_INTERVAL_AUTO |
 862                                 FE_CAN_HIERARCHY_AUTO |
 863                                 FE_CAN_MUTE_TS |
 864                                 FE_CAN_2G_MODULATION
 865                 },
 866
 867                 .release = cxd2820r_release,
 868                 .init = cxd2820r_init,
 869                 .sleep = cxd2820r_sleep,
 870
 871                 .get_tune_settings = cxd2820r_get_tune_settings,
 872
 873                 .get_frontend = cxd2820r_get_frontend,
 874
 875                 .get_frontend_algo = cxd2820r_get_frontend_algo,
 876                 .search = cxd2820r_search,
 877
 878                 .read_status = cxd2820r_read_status,
 879                 .read_snr = cxd2820r_read_snr,
 880                 .read_ber = cxd2820r_read_ber,
 881                 .read_ucblocks = cxd2820r_read_ucblocks,
 882                 .read_signal_strength = cxd2820r_read_signal_strength,
 883         },
 884         {
 885                 /* DVB-C */
 886                 .info = {
 887                         .name = "Sony CXD2820R (DVB-C)",
 888                         .type = FE_QAM,
 889                         .caps =
 890                                 FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
 891                                 FE_CAN_QAM_128 | FE_CAN_QAM_256 |
 892                                 FE_CAN_FEC_AUTO
 893                 },
 894
 895                 .release = cxd2820r_release,
 896                 .init = cxd2820r_init,
 897                 .sleep = cxd2820r_sleep,
 898
 899                 .get_tune_settings = cxd2820r_get_tune_settings,
 900
 901                 .set_frontend = cxd2820r_set_frontend,
 902                 .get_frontend = cxd2820r_get_frontend,
 903
 904                 .read_status = cxd2820r_read_status,
 905                 .read_snr = cxd2820r_read_snr,
 906                 .read_ber = cxd2820r_read_ber,
 907                 .read_ucblocks = cxd2820r_read_ucblocks,
 908                 .read_signal_strength = cxd2820r_read_signal_strength,
 909         },
 910 };
 911
 912
 913 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 914 MODULE_DESCRIPTION("Sony CXD2820R demodulator driver");
 915 MODULE_LICENSE("GPL");