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 /* write multiple registers */
  25 static int cxd2820r_wr_regs_i2c(struct cxd2820r_priv *priv, u8 i2c, u8 reg,
  26         u8 *val, int len)
  27 {
  28         int ret;
  29         u8 buf[len+1];
  30         struct i2c_msg msg[1] = {
  31                 {
  32                         .addr = i2c,
  33                         .flags = 0,
  34                         .len = sizeof(buf),
  35                         .buf = buf,
  36                 }
  37         };
  38
  39         buf[0] = reg;
  40         memcpy(&buf[1], val, len);
  41
  42         ret = i2c_transfer(priv->i2c, msg, 1);
  43         if (ret == 1) {
  44                 ret = 0;
  45         } else {
  46                 dev_warn(&priv->i2c->dev, "%s: i2c wr failed=%d reg=%02x " \
  47                                 "len=%d\n", KBUILD_MODNAME, ret, reg, len);
  48                 ret = -EREMOTEIO;
  49         }
  50         return ret;
  51 }
  52
  53 /* read multiple registers */
  54 static int cxd2820r_rd_regs_i2c(struct cxd2820r_priv *priv, u8 i2c, u8 reg,
  55         u8 *val, int len)
  56 {
  57         int ret;
  58         u8 buf[len];
  59         struct i2c_msg msg[2] = {
  60                 {
  61                         .addr = i2c,
  62                         .flags = 0,
  63                         .len = 1,
  64                         .buf = &reg,
  65                 }, {
  66                         .addr = i2c,
  67                         .flags = I2C_M_RD,
  68                         .len = sizeof(buf),
  69                         .buf = buf,
  70                 }
  71         };
  72
  73         ret = i2c_transfer(priv->i2c, msg, 2);
  74         if (ret == 2) {
  75                 memcpy(val, buf, len);
  76                 ret = 0;
  77         } else {
  78                 dev_warn(&priv->i2c->dev, "%s: i2c rd failed=%d reg=%02x " \
  79                                 "len=%d\n", KBUILD_MODNAME, ret, reg, len);
  80                 ret = -EREMOTEIO;
  81         }
  82
  83         return ret;
  84 }
  85
  86 /* write multiple registers */
  87 int cxd2820r_wr_regs(struct cxd2820r_priv *priv, u32 reginfo, u8 *val,
  88         int len)
  89 {
  90         int ret;
  91         u8 i2c_addr;
  92         u8 reg = (reginfo >> 0) & 0xff;
  93         u8 bank = (reginfo >> 8) & 0xff;
  94         u8 i2c = (reginfo >> 16) & 0x01;
  95
  96         /* select I2C */
  97         if (i2c)
  98                 i2c_addr = priv->cfg.i2c_address | (1 << 1); /* DVB-C */
  99         else
 100                 i2c_addr = priv->cfg.i2c_address; /* DVB-T/T2 */
 101
 102         /* switch bank if needed */
 103         if (bank != priv->bank[i2c]) {
 104                 ret = cxd2820r_wr_regs_i2c(priv, i2c_addr, 0x00, &bank, 1);
 105                 if (ret)
 106                         return ret;
 107                 priv->bank[i2c] = bank;
 108         }
 109         return cxd2820r_wr_regs_i2c(priv, i2c_addr, reg, val, len);
 110 }
 111
 112 /* read multiple registers */
 113 int cxd2820r_rd_regs(struct cxd2820r_priv *priv, u32 reginfo, u8 *val,
 114         int len)
 115 {
 116         int ret;
 117         u8 i2c_addr;
 118         u8 reg = (reginfo >> 0) & 0xff;
 119         u8 bank = (reginfo >> 8) & 0xff;
 120         u8 i2c = (reginfo >> 16) & 0x01;
 121
 122         /* select I2C */
 123         if (i2c)
 124                 i2c_addr = priv->cfg.i2c_address | (1 << 1); /* DVB-C */
 125         else
 126                 i2c_addr = priv->cfg.i2c_address; /* DVB-T/T2 */
 127
 128         /* switch bank if needed */
 129         if (bank != priv->bank[i2c]) {
 130                 ret = cxd2820r_wr_regs_i2c(priv, i2c_addr, 0x00, &bank, 1);
 131                 if (ret)
 132                         return ret;
 133                 priv->bank[i2c] = bank;
 134         }
 135         return cxd2820r_rd_regs_i2c(priv, i2c_addr, reg, val, len);
 136 }
 137
 138 /* write single register */
 139 int cxd2820r_wr_reg(struct cxd2820r_priv *priv, u32 reg, u8 val)
 140 {
 141         return cxd2820r_wr_regs(priv, reg, &val, 1);
 142 }
 143
 144 /* read single register */
 145 int cxd2820r_rd_reg(struct cxd2820r_priv *priv, u32 reg, u8 *val)
 146 {
 147         return cxd2820r_rd_regs(priv, reg, val, 1);
 148 }
 149
 150 /* write single register with mask */
 151 int cxd2820r_wr_reg_mask(struct cxd2820r_priv *priv, u32 reg, u8 val,
 152         u8 mask)
 153 {
 154         int ret;
 155         u8 tmp;
 156
 157         /* no need for read if whole reg is written */
 158         if (mask != 0xff) {
 159                 ret = cxd2820r_rd_reg(priv, reg, &tmp);
 160                 if (ret)
 161                         return ret;
 162
 163                 val &= mask;
 164                 tmp &= ~mask;
 165                 val |= tmp;
 166         }
 167
 168         return cxd2820r_wr_reg(priv, reg, val);
 169 }
 170
 171 int cxd2820r_gpio(struct dvb_frontend *fe, u8 *gpio)
 172 {
 173         struct cxd2820r_priv *priv = fe->demodulator_priv;
 174         int ret, i;
 175         u8 tmp0, tmp1;
 176
 177         dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
 178                         fe->dtv_property_cache.delivery_system);
 179
 180         /* update GPIOs only when needed */
 181         if (!memcmp(gpio, priv->gpio, sizeof(priv->gpio)))
 182                 return 0;
 183
 184         tmp0 = 0x00;
 185         tmp1 = 0x00;
 186         for (i = 0; i < sizeof(priv->gpio); i++) {
 187                 /* enable / disable */
 188                 if (gpio[i] & CXD2820R_GPIO_E)
 189                         tmp0 |= (2 << 6) >> (2 * i);
 190                 else
 191                         tmp0 |= (1 << 6) >> (2 * i);
 192
 193                 /* input / output */
 194                 if (gpio[i] & CXD2820R_GPIO_I)
 195                         tmp1 |= (1 << (3 + i));
 196                 else
 197                         tmp1 |= (0 << (3 + i));
 198
 199                 /* high / low */
 200                 if (gpio[i] & CXD2820R_GPIO_H)
 201                         tmp1 |= (1 << (0 + i));
 202                 else
 203                         tmp1 |= (0 << (0 + i));
 204
 205                 dev_dbg(&priv->i2c->dev, "%s: gpio i=%d %02x %02x\n", __func__,
 206                                 i, tmp0, tmp1);
 207         }
 208
 209         dev_dbg(&priv->i2c->dev, "%s: wr gpio=%02x %02x\n", __func__, tmp0,
 210                         tmp1);
 211
 212         /* write bits [7:2] */
 213         ret = cxd2820r_wr_reg_mask(priv, 0x00089, tmp0, 0xfc);
 214         if (ret)
 215                 goto error;
 216
 217         /* write bits [5:0] */
 218         ret = cxd2820r_wr_reg_mask(priv, 0x0008e, tmp1, 0x3f);
 219         if (ret)
 220                 goto error;
 221
 222         memcpy(priv->gpio, gpio, sizeof(priv->gpio));
 223
 224         return ret;
 225 error:
 226         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 227         return ret;
 228 }
 229
 230 /* 64 bit div with round closest, like DIV_ROUND_CLOSEST but 64 bit */
 231 u32 cxd2820r_div_u64_round_closest(u64 dividend, u32 divisor)
 232 {
 233         return div_u64(dividend + (divisor / 2), divisor);
 234 }
 235
 236 static int cxd2820r_set_frontend(struct dvb_frontend *fe)
 237 {
 238         struct cxd2820r_priv *priv = fe->demodulator_priv;
 239         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 240         int ret;
 241
 242         dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
 243                         fe->dtv_property_cache.delivery_system);
 244
 245         switch (c->delivery_system) {
 246         case SYS_DVBT:
 247                 ret = cxd2820r_init_t(fe);
 248                 if (ret < 0)
 249                         goto err;
 250                 ret = cxd2820r_set_frontend_t(fe);
 251                 if (ret < 0)
 252                         goto err;
 253                 break;
 254         case SYS_DVBT2:
 255                 ret = cxd2820r_init_t(fe);
 256                 if (ret < 0)
 257                         goto err;
 258                 ret = cxd2820r_set_frontend_t2(fe);
 259                 if (ret < 0)
 260                         goto err;
 261                 break;
 262         case SYS_DVBC_ANNEX_A:
 263                 ret = cxd2820r_init_c(fe);
 264                 if (ret < 0)
 265                         goto err;
 266                 ret = cxd2820r_set_frontend_c(fe);
 267                 if (ret < 0)
 268                         goto err;
 269                 break;
 270         default:
 271                 dev_dbg(&priv->i2c->dev, "%s: error state=%d\n", __func__,
 272                                 fe->dtv_property_cache.delivery_system);
 273                 ret = -EINVAL;
 274                 break;
 275         }
 276 err:
 277         return ret;
 278 }
 279 static int cxd2820r_read_status(struct dvb_frontend *fe, fe_status_t *status)
 280 {
 281         struct cxd2820r_priv *priv = fe->demodulator_priv;
 282         int ret;
 283
 284         dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
 285                         fe->dtv_property_cache.delivery_system);
 286
 287         switch (fe->dtv_property_cache.delivery_system) {
 288         case SYS_DVBT:
 289                 ret = cxd2820r_read_status_t(fe, status);
 290                 break;
 291         case SYS_DVBT2:
 292                 ret = cxd2820r_read_status_t2(fe, status);
 293                 break;
 294         case SYS_DVBC_ANNEX_A:
 295                 ret = cxd2820r_read_status_c(fe, status);
 296                 break;
 297         default:
 298                 ret = -EINVAL;
 299                 break;
 300         }
 301         return ret;
 302 }
 303
 304 static int cxd2820r_get_frontend(struct dvb_frontend *fe)
 305 {
 306         struct cxd2820r_priv *priv = fe->demodulator_priv;
 307         int ret;
 308
 309         dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
 310                         fe->dtv_property_cache.delivery_system);
 311
 312         if (priv->delivery_system == SYS_UNDEFINED)
 313                 return 0;
 314
 315         switch (fe->dtv_property_cache.delivery_system) {
 316         case SYS_DVBT:
 317                 ret = cxd2820r_get_frontend_t(fe);
 318                 break;
 319         case SYS_DVBT2:
 320                 ret = cxd2820r_get_frontend_t2(fe);
 321                 break;
 322         case SYS_DVBC_ANNEX_A:
 323                 ret = cxd2820r_get_frontend_c(fe);
 324                 break;
 325         default:
 326                 ret = -EINVAL;
 327                 break;
 328         }
 329         return ret;
 330 }
 331
 332 static int cxd2820r_read_ber(struct dvb_frontend *fe, u32 *ber)
 333 {
 334         struct cxd2820r_priv *priv = fe->demodulator_priv;
 335         int ret;
 336
 337         dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
 338                         fe->dtv_property_cache.delivery_system);
 339
 340         switch (fe->dtv_property_cache.delivery_system) {
 341         case SYS_DVBT:
 342                 ret = cxd2820r_read_ber_t(fe, ber);
 343                 break;
 344         case SYS_DVBT2:
 345                 ret = cxd2820r_read_ber_t2(fe, ber);
 346                 break;
 347         case SYS_DVBC_ANNEX_A:
 348                 ret = cxd2820r_read_ber_c(fe, ber);
 349                 break;
 350         default:
 351                 ret = -EINVAL;
 352                 break;
 353         }
 354         return ret;
 355 }
 356
 357 static int cxd2820r_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
 358 {
 359         struct cxd2820r_priv *priv = fe->demodulator_priv;
 360         int ret;
 361
 362         dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
 363                         fe->dtv_property_cache.delivery_system);
 364
 365         switch (fe->dtv_property_cache.delivery_system) {
 366         case SYS_DVBT:
 367                 ret = cxd2820r_read_signal_strength_t(fe, strength);
 368                 break;
 369         case SYS_DVBT2:
 370                 ret = cxd2820r_read_signal_strength_t2(fe, strength);
 371                 break;
 372         case SYS_DVBC_ANNEX_A:
 373                 ret = cxd2820r_read_signal_strength_c(fe, strength);
 374                 break;
 375         default:
 376                 ret = -EINVAL;
 377                 break;
 378         }
 379         return ret;
 380 }
 381
 382 static int cxd2820r_read_snr(struct dvb_frontend *fe, u16 *snr)
 383 {
 384         struct cxd2820r_priv *priv = fe->demodulator_priv;
 385         int ret;
 386
 387         dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
 388                         fe->dtv_property_cache.delivery_system);
 389
 390         switch (fe->dtv_property_cache.delivery_system) {
 391         case SYS_DVBT:
 392                 ret = cxd2820r_read_snr_t(fe, snr);
 393                 break;
 394         case SYS_DVBT2:
 395                 ret = cxd2820r_read_snr_t2(fe, snr);
 396                 break;
 397         case SYS_DVBC_ANNEX_A:
 398                 ret = cxd2820r_read_snr_c(fe, snr);
 399                 break;
 400         default:
 401                 ret = -EINVAL;
 402                 break;
 403         }
 404         return ret;
 405 }
 406
 407 static int cxd2820r_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
 408 {
 409         struct cxd2820r_priv *priv = fe->demodulator_priv;
 410         int ret;
 411
 412         dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
 413                         fe->dtv_property_cache.delivery_system);
 414
 415         switch (fe->dtv_property_cache.delivery_system) {
 416         case SYS_DVBT:
 417                 ret = cxd2820r_read_ucblocks_t(fe, ucblocks);
 418                 break;
 419         case SYS_DVBT2:
 420                 ret = cxd2820r_read_ucblocks_t2(fe, ucblocks);
 421                 break;
 422         case SYS_DVBC_ANNEX_A:
 423                 ret = cxd2820r_read_ucblocks_c(fe, ucblocks);
 424                 break;
 425         default:
 426                 ret = -EINVAL;
 427                 break;
 428         }
 429         return ret;
 430 }
 431
 432 static int cxd2820r_init(struct dvb_frontend *fe)
 433 {
 434         return 0;
 435 }
 436
 437 static int cxd2820r_sleep(struct dvb_frontend *fe)
 438 {
 439         struct cxd2820r_priv *priv = fe->demodulator_priv;
 440         int ret;
 441
 442         dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
 443                         fe->dtv_property_cache.delivery_system);
 444
 445         switch (fe->dtv_property_cache.delivery_system) {
 446         case SYS_DVBT:
 447                 ret = cxd2820r_sleep_t(fe);
 448                 break;
 449         case SYS_DVBT2:
 450                 ret = cxd2820r_sleep_t2(fe);
 451                 break;
 452         case SYS_DVBC_ANNEX_A:
 453                 ret = cxd2820r_sleep_c(fe);
 454                 break;
 455         default:
 456                 ret = -EINVAL;
 457                 break;
 458         }
 459         return ret;
 460 }
 461
 462 static int cxd2820r_get_tune_settings(struct dvb_frontend *fe,
 463                                       struct dvb_frontend_tune_settings *s)
 464 {
 465         struct cxd2820r_priv *priv = fe->demodulator_priv;
 466         int ret;
 467
 468         dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
 469                         fe->dtv_property_cache.delivery_system);
 470
 471         switch (fe->dtv_property_cache.delivery_system) {
 472         case SYS_DVBT:
 473                 ret = cxd2820r_get_tune_settings_t(fe, s);
 474                 break;
 475         case SYS_DVBT2:
 476                 ret = cxd2820r_get_tune_settings_t2(fe, s);
 477                 break;
 478         case SYS_DVBC_ANNEX_A:
 479                 ret = cxd2820r_get_tune_settings_c(fe, s);
 480                 break;
 481         default:
 482                 ret = -EINVAL;
 483                 break;
 484         }
 485         return ret;
 486 }
 487
 488 static enum dvbfe_search cxd2820r_search(struct dvb_frontend *fe)
 489 {
 490         struct cxd2820r_priv *priv = fe->demodulator_priv;
 491         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 492         int ret, i;
 493         fe_status_t status = 0;
 494
 495         dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
 496                         fe->dtv_property_cache.delivery_system);
 497
 498         /* switch between DVB-T and DVB-T2 when tune fails */
 499         if (priv->last_tune_failed) {
 500                 if (priv->delivery_system == SYS_DVBT) {
 501                         ret = cxd2820r_sleep_t(fe);
 502                         if (ret)
 503                                 goto error;
 504
 505                         c->delivery_system = SYS_DVBT2;
 506                 } else if (priv->delivery_system == SYS_DVBT2) {
 507                         ret = cxd2820r_sleep_t2(fe);
 508                         if (ret)
 509                                 goto error;
 510
 511                         c->delivery_system = SYS_DVBT;
 512                 }
 513         }
 514
 515         /* set frontend */
 516         ret = cxd2820r_set_frontend(fe);
 517         if (ret)
 518                 goto error;
 519
 520
 521         /* frontend lock wait loop count */
 522         switch (priv->delivery_system) {
 523         case SYS_DVBT:
 524         case SYS_DVBC_ANNEX_A:
 525                 i = 20;
 526                 break;
 527         case SYS_DVBT2:
 528                 i = 40;
 529                 break;
 530         case SYS_UNDEFINED:
 531         default:
 532                 i = 0;
 533                 break;
 534         }
 535
 536         /* wait frontend lock */
 537         for (; i > 0; i--) {
 538                 dev_dbg(&priv->i2c->dev, "%s: loop=%d\n", __func__, i);
 539                 msleep(50);
 540                 ret = cxd2820r_read_status(fe, &status);
 541                 if (ret)
 542                         goto error;
 543
 544                 if (status & FE_HAS_LOCK)
 545                         break;
 546         }
 547
 548         /* check if we have a valid signal */
 549         if (status & FE_HAS_LOCK) {
 550                 priv->last_tune_failed = 0;
 551                 return DVBFE_ALGO_SEARCH_SUCCESS;
 552         } else {
 553                 priv->last_tune_failed = 1;
 554                 return DVBFE_ALGO_SEARCH_AGAIN;
 555         }
 556
 557 error:
 558         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 559         return DVBFE_ALGO_SEARCH_ERROR;
 560 }
 561
 562 static int cxd2820r_get_frontend_algo(struct dvb_frontend *fe)
 563 {
 564         return DVBFE_ALGO_CUSTOM;
 565 }
 566
 567 static void cxd2820r_release(struct dvb_frontend *fe)
 568 {
 569         struct cxd2820r_priv *priv = fe->demodulator_priv;
 570         int uninitialized_var(ret); /* silence compiler warning */
 571
 572         dev_dbg(&priv->i2c->dev, "%s\n", __func__);
 573
 574 #ifdef CONFIG_GPIOLIB
 575         /* remove GPIOs */
 576         if (priv->gpio_chip.label) {
 577                 ret = gpiochip_remove(&priv->gpio_chip);
 578                 if (ret)
 579                         dev_err(&priv->i2c->dev, "%s: gpiochip_remove() " \
 580                                         "failed=%d\n", KBUILD_MODNAME, ret);
 581         }
 582 #endif
 583         kfree(priv);
 584         return;
 585 }
 586
 587 static int cxd2820r_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
 588 {
 589         struct cxd2820r_priv *priv = fe->demodulator_priv;
 590
 591         dev_dbg(&priv->i2c->dev, "%s: %d\n", __func__, enable);
 592
 593         /* Bit 0 of reg 0xdb in bank 0x00 controls I2C repeater */
 594         return cxd2820r_wr_reg_mask(priv, 0xdb, enable ? 1 : 0, 0x1);
 595 }
 596
 597 #ifdef CONFIG_GPIOLIB
 598 static int cxd2820r_gpio_direction_output(struct gpio_chip *chip, unsigned nr,
 599                 int val)
 600 {
 601         struct cxd2820r_priv *priv =
 602                         container_of(chip, struct cxd2820r_priv, gpio_chip);
 603         u8 gpio[GPIO_COUNT];
 604
 605         dev_dbg(&priv->i2c->dev, "%s: nr=%d val=%d\n", __func__, nr, val);
 606
 607         memcpy(gpio, priv->gpio, sizeof(gpio));
 608         gpio[nr] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | (val << 2);
 609
 610         return cxd2820r_gpio(&priv->fe, gpio);
 611 }
 612
 613 static void cxd2820r_gpio_set(struct gpio_chip *chip, unsigned nr, int val)
 614 {
 615         struct cxd2820r_priv *priv =
 616                         container_of(chip, struct cxd2820r_priv, gpio_chip);
 617         u8 gpio[GPIO_COUNT];
 618
 619         dev_dbg(&priv->i2c->dev, "%s: nr=%d val=%d\n", __func__, nr, val);
 620
 621         memcpy(gpio, priv->gpio, sizeof(gpio));
 622         gpio[nr] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | (val << 2);
 623
 624         (void) cxd2820r_gpio(&priv->fe, gpio);
 625
 626         return;
 627 }
 628
 629 static int cxd2820r_gpio_get(struct gpio_chip *chip, unsigned nr)
 630 {
 631         struct cxd2820r_priv *priv =
 632                         container_of(chip, struct cxd2820r_priv, gpio_chip);
 633
 634         dev_dbg(&priv->i2c->dev, "%s: nr=%d\n", __func__, nr);
 635
 636         return (priv->gpio[nr] >> 2) & 0x01;
 637 }
 638 #endif
 639
 640 static const struct dvb_frontend_ops cxd2820r_ops = {
 641         .delsys = { SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A },
 642         /* default: DVB-T/T2 */
 643         .info = {
 644                 .name = "Sony CXD2820R",
 645
 646                 .caps = FE_CAN_FEC_1_2                  |
 647                         FE_CAN_FEC_2_3                  |
 648                         FE_CAN_FEC_3_4                  |
 649                         FE_CAN_FEC_5_6                  |
 650                         FE_CAN_FEC_7_8                  |
 651                         FE_CAN_FEC_AUTO                 |
 652                         FE_CAN_QPSK                     |
 653                         FE_CAN_QAM_16                   |
 654                         FE_CAN_QAM_32                   |
 655                         FE_CAN_QAM_64                   |
 656                         FE_CAN_QAM_128                  |
 657                         FE_CAN_QAM_256                  |
 658                         FE_CAN_QAM_AUTO                 |
 659                         FE_CAN_TRANSMISSION_MODE_AUTO   |
 660                         FE_CAN_GUARD_INTERVAL_AUTO      |
 661                         FE_CAN_HIERARCHY_AUTO           |
 662                         FE_CAN_MUTE_TS                  |
 663                         FE_CAN_2G_MODULATION
 664                 },
 665
 666         .release                = cxd2820r_release,
 667         .init                   = cxd2820r_init,
 668         .sleep                  = cxd2820r_sleep,
 669
 670         .get_tune_settings      = cxd2820r_get_tune_settings,
 671         .i2c_gate_ctrl          = cxd2820r_i2c_gate_ctrl,
 672
 673         .get_frontend           = cxd2820r_get_frontend,
 674
 675         .get_frontend_algo      = cxd2820r_get_frontend_algo,
 676         .search                 = cxd2820r_search,
 677
 678         .read_status            = cxd2820r_read_status,
 679         .read_snr               = cxd2820r_read_snr,
 680         .read_ber               = cxd2820r_read_ber,
 681         .read_ucblocks          = cxd2820r_read_ucblocks,
 682         .read_signal_strength   = cxd2820r_read_signal_strength,
 683 };
 684
 685 struct dvb_frontend *cxd2820r_attach(const struct cxd2820r_config *cfg,
 686                 struct i2c_adapter *i2c, int *gpio_chip_base
 687 )
 688 {
 689         struct cxd2820r_priv *priv;
 690         int ret;
 691         u8 tmp;
 692
 693         priv = kzalloc(sizeof(struct cxd2820r_priv), GFP_KERNEL);
 694         if (!priv) {
 695                 ret = -ENOMEM;
 696                 dev_err(&i2c->dev, "%s: kzalloc() failed\n",
 697                                 KBUILD_MODNAME);
 698                 goto error;
 699         }
 700
 701         priv->i2c = i2c;
 702         memcpy(&priv->cfg, cfg, sizeof(struct cxd2820r_config));
 703         memcpy(&priv->fe.ops, &cxd2820r_ops, sizeof(struct dvb_frontend_ops));
 704         priv->fe.demodulator_priv = priv;
 705
 706         priv->bank[0] = priv->bank[1] = 0xff;
 707         ret = cxd2820r_rd_reg(priv, 0x000fd, &tmp);
 708         dev_dbg(&priv->i2c->dev, "%s: chip id=%02x\n", __func__, tmp);
 709         if (ret || tmp != 0xe1)
 710                 goto error;
 711
 712         if (gpio_chip_base) {
 713 #ifdef CONFIG_GPIOLIB
 714                 /* add GPIOs */
 715                 priv->gpio_chip.label = KBUILD_MODNAME;
 716                 priv->gpio_chip.dev = &priv->i2c->dev;
 717                 priv->gpio_chip.owner = THIS_MODULE;
 718                 priv->gpio_chip.direction_output =
 719                                 cxd2820r_gpio_direction_output;
 720                 priv->gpio_chip.set = cxd2820r_gpio_set;
 721                 priv->gpio_chip.get = cxd2820r_gpio_get;
 722                 priv->gpio_chip.base = -1; /* dynamic allocation */
 723                 priv->gpio_chip.ngpio = GPIO_COUNT;
 724                 priv->gpio_chip.can_sleep = 1;
 725                 ret = gpiochip_add(&priv->gpio_chip);
 726                 if (ret)
 727                         goto error;
 728
 729                 dev_dbg(&priv->i2c->dev, "%s: gpio_chip.base=%d\n", __func__,
 730                                 priv->gpio_chip.base);
 731
 732                 *gpio_chip_base = priv->gpio_chip.base;
 733 #else
 734                 /*
 735                  * Use static GPIO configuration if GPIOLIB is undefined.
 736                  * This is fallback condition.
 737                  */
 738                 u8 gpio[GPIO_COUNT];
 739                 gpio[0] = (*gpio_chip_base >> 0) & 0x07;
 740                 gpio[1] = (*gpio_chip_base >> 3) & 0x07;
 741                 gpio[2] = 0;
 742                 ret = cxd2820r_gpio(&priv->fe, gpio);
 743                 if (ret)
 744                         goto error;
 745 #endif
 746         }
 747
 748         return &priv->fe;
 749 error:
 750         dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret);
 751         kfree(priv);
 752         return NULL;
 753 }
 754 EXPORT_SYMBOL(cxd2820r_attach);
 755
 756 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 757 MODULE_DESCRIPTION("Sony CXD2820R demodulator driver");
 758 MODULE_LICENSE("GPL");