drivers/media/dvb-frontends/cxd2820r_c.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_set_frontend_c(struct dvb_frontend *fe)
  25 {
  26         struct cxd2820r_priv *priv = fe->demodulator_priv;
  27         struct i2c_client *client = priv->client[0];
  28         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  29         int ret;
  30         unsigned int utmp;
  31         u8 buf[2];
  32         u32 if_frequency;
  33         struct reg_val_mask tab[] = {
  34                 { 0x00080, 0x01, 0xff },
  35                 { 0x00081, 0x05, 0xff },
  36                 { 0x00085, 0x07, 0xff },
  37                 { 0x00088, 0x01, 0xff },
  38
  39                 { 0x00082, 0x20, 0x60 },
  40                 { 0x1016a, 0x48, 0xff },
  41                 { 0x100a5, 0x00, 0x01 },
  42                 { 0x10020, 0x06, 0x07 },
  43                 { 0x10059, 0x50, 0xff },
  44                 { 0x10087, 0x0c, 0x3c },
  45                 { 0x1008b, 0x07, 0xff },
  46                 { 0x1001f, priv->if_agc_polarity << 7, 0x80 },
  47                 { 0x10070, priv->ts_mode, 0xff },
  48                 { 0x10071, !priv->ts_clk_inv << 4, 0x10 },
  49         };
  50
  51         dev_dbg(&client->dev,
  52                 "delivery_system=%d modulation=%d frequency=%u symbol_rate=%u inversion=%d\n",
  53                 c->delivery_system, c->modulation, c->frequency,
  54                 c->symbol_rate, c->inversion);
  55
  56         /* program tuner */
  57         if (fe->ops.tuner_ops.set_params)
  58                 fe->ops.tuner_ops.set_params(fe);
  59
  60         if (priv->delivery_system !=  SYS_DVBC_ANNEX_A) {
  61                 ret = cxd2820r_wr_reg_val_mask_tab(priv, tab, ARRAY_SIZE(tab));
  62                 if (ret)
  63                         goto error;
  64         }
  65
  66         priv->delivery_system = SYS_DVBC_ANNEX_A;
  67         priv->ber_running = false; /* tune stops BER counter */
  68
  69         /* program IF frequency */
  70         if (fe->ops.tuner_ops.get_if_frequency) {
  71                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
  72                 if (ret)
  73                         goto error;
  74                 dev_dbg(&client->dev, "if_frequency=%u\n", if_frequency);
  75         } else {
  76                 ret = -EINVAL;
  77                 goto error;
  78         }
  79
  80         utmp = 0x4000 - DIV_ROUND_CLOSEST_ULL((u64)if_frequency * 0x4000, CXD2820R_CLK);
  81         buf[0] = (utmp >> 8) & 0xff;
  82         buf[1] = (utmp >> 0) & 0xff;
  83         ret = regmap_bulk_write(priv->regmap[1], 0x0042, buf, 2);
  84         if (ret)
  85                 goto error;
  86
  87         ret = regmap_write(priv->regmap[0], 0x00ff, 0x08);
  88         if (ret)
  89                 goto error;
  90
  91         ret = regmap_write(priv->regmap[0], 0x00fe, 0x01);
  92         if (ret)
  93                 goto error;
  94
  95         return ret;
  96 error:
  97         dev_dbg(&client->dev, "failed=%d\n", ret);
  98         return ret;
  99 }
 100
 101 int cxd2820r_get_frontend_c(struct dvb_frontend *fe,
 102                             struct dtv_frontend_properties *c)
 103 {
 104         struct cxd2820r_priv *priv = fe->demodulator_priv;
 105         struct i2c_client *client = priv->client[0];
 106         int ret;
 107         unsigned int utmp;
 108         u8 buf[2];
 109
 110         dev_dbg(&client->dev, "\n");
 111
 112         ret = regmap_bulk_read(priv->regmap[1], 0x001a, buf, 2);
 113         if (ret)
 114                 goto error;
 115
 116         c->symbol_rate = 2500 * ((buf[0] & 0x0f) << 8 | buf[1]);
 117
 118         ret = regmap_read(priv->regmap[1], 0x0019, &utmp);
 119         if (ret)
 120                 goto error;
 121
 122         switch ((utmp >> 0) & 0x07) {
 123         case 0:
 124                 c->modulation = QAM_16;
 125                 break;
 126         case 1:
 127                 c->modulation = QAM_32;
 128                 break;
 129         case 2:
 130                 c->modulation = QAM_64;
 131                 break;
 132         case 3:
 133                 c->modulation = QAM_128;
 134                 break;
 135         case 4:
 136                 c->modulation = QAM_256;
 137                 break;
 138         }
 139
 140         switch ((utmp >> 7) & 0x01) {
 141         case 0:
 142                 c->inversion = INVERSION_OFF;
 143                 break;
 144         case 1:
 145                 c->inversion = INVERSION_ON;
 146                 break;
 147         }
 148
 149         return ret;
 150 error:
 151         dev_dbg(&client->dev, "failed=%d\n", ret);
 152         return ret;
 153 }
 154
 155 int cxd2820r_read_status_c(struct dvb_frontend *fe, enum fe_status *status)
 156 {
 157         struct cxd2820r_priv *priv = fe->demodulator_priv;
 158         struct i2c_client *client = priv->client[0];
 159         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 160         int ret;
 161         unsigned int utmp, utmp1, utmp2;
 162         u8 buf[3];
 163
 164         /* Lock detection */
 165         ret = regmap_bulk_read(priv->regmap[1], 0x0088, &buf[0], 1);
 166         if (ret)
 167                 goto error;
 168         ret = regmap_bulk_read(priv->regmap[1], 0x0073, &buf[1], 1);
 169         if (ret)
 170                 goto error;
 171
 172         utmp1 = (buf[0] >> 0) & 0x01;
 173         utmp2 = (buf[1] >> 3) & 0x01;
 174
 175         if (utmp1 == 1 && utmp2 == 1) {
 176                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 177                           FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 178         } else if (utmp1 == 1 || utmp2 == 1) {
 179                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 180                           FE_HAS_VITERBI | FE_HAS_SYNC;
 181         } else {
 182                 *status = 0;
 183         }
 184
 185         dev_dbg(&client->dev, "status=%02x raw=%*ph sync=%u ts=%u\n",
 186                 *status, 2, buf, utmp1, utmp2);
 187
 188         /* Signal strength */
 189         if (*status & FE_HAS_SIGNAL) {
 190                 unsigned int strength;
 191
 192                 ret = regmap_bulk_read(priv->regmap[1], 0x0049, buf, 2);
 193                 if (ret)
 194                         goto error;
 195
 196                 utmp = buf[0] << 8 | buf[1] << 0;
 197                 utmp = 511 - sign_extend32(utmp, 9);
 198                 /* Scale value to 0x0000-0xffff */
 199                 strength = utmp << 6 | utmp >> 4;
 200
 201                 c->strength.len = 1;
 202                 c->strength.stat[0].scale = FE_SCALE_RELATIVE;
 203                 c->strength.stat[0].uvalue = strength;
 204         } else {
 205                 c->strength.len = 1;
 206                 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 207         }
 208
 209         /* CNR */
 210         if (*status & FE_HAS_VITERBI) {
 211                 unsigned int cnr, const_a, const_b;
 212
 213                 ret = regmap_read(priv->regmap[1], 0x0019, &utmp);
 214                 if (ret)
 215                         goto error;
 216
 217                 if (((utmp >> 0) & 0x03) % 2) {
 218                         const_a = 8750;
 219                         const_b = 650;
 220                 } else {
 221                         const_a = 9500;
 222                         const_b = 760;
 223                 }
 224
 225                 ret = regmap_read(priv->regmap[1], 0x004d, &utmp);
 226                 if (ret)
 227                         goto error;
 228
 229                 #define CXD2820R_LOG2_E_24 24204406 /* log2(e) << 24 */
 230                 if (utmp)
 231                         cnr = div_u64((u64)(intlog2(const_b) - intlog2(utmp))
 232                                       * const_a, CXD2820R_LOG2_E_24);
 233                 else
 234                         cnr = 0;
 235
 236                 c->cnr.len = 1;
 237                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 238                 c->cnr.stat[0].svalue = cnr;
 239         } else {
 240                 c->cnr.len = 1;
 241                 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 242         }
 243
 244         /* BER */
 245         if (*status & FE_HAS_SYNC) {
 246                 unsigned int post_bit_error;
 247                 bool start_ber;
 248
 249                 if (priv->ber_running) {
 250                         ret = regmap_bulk_read(priv->regmap[1], 0x0076, buf, 3);
 251                         if (ret)
 252                                 goto error;
 253
 254                         if ((buf[2] >> 7) & 0x01) {
 255                                 post_bit_error = buf[2] << 16 | buf[1] << 8 |
 256                                                  buf[0] << 0;
 257                                 post_bit_error &= 0x0fffff;
 258                                 start_ber = true;
 259                         } else {
 260                                 post_bit_error = 0;
 261                                 start_ber = false;
 262                         }
 263                 } else {
 264                         post_bit_error = 0;
 265                         start_ber = true;
 266                 }
 267
 268                 if (start_ber) {
 269                         ret = regmap_write(priv->regmap[1], 0x0079, 0x01);
 270                         if (ret)
 271                                 goto error;
 272                         priv->ber_running = true;
 273                 }
 274
 275                 priv->post_bit_error += post_bit_error;
 276
 277                 c->post_bit_error.len = 1;
 278                 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
 279                 c->post_bit_error.stat[0].uvalue = priv->post_bit_error;
 280         } else {
 281                 c->post_bit_error.len = 1;
 282                 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 283         }
 284
 285         return ret;
 286 error:
 287         dev_dbg(&client->dev, "failed=%d\n", ret);
 288         return ret;
 289 }
 290
 291 int cxd2820r_init_c(struct dvb_frontend *fe)
 292 {
 293         struct cxd2820r_priv *priv = fe->demodulator_priv;
 294         struct i2c_client *client = priv->client[0];
 295         int ret;
 296
 297         dev_dbg(&client->dev, "\n");
 298
 299         ret = regmap_write(priv->regmap[0], 0x0085, 0x07);
 300         if (ret)
 301                 goto error;
 302
 303         return ret;
 304 error:
 305         dev_dbg(&client->dev, "failed=%d\n", ret);
 306         return ret;
 307 }
 308
 309 int cxd2820r_sleep_c(struct dvb_frontend *fe)
 310 {
 311         struct cxd2820r_priv *priv = fe->demodulator_priv;
 312         struct i2c_client *client = priv->client[0];
 313         int ret;
 314         struct reg_val_mask tab[] = {
 315                 { 0x000ff, 0x1f, 0xff },
 316                 { 0x00085, 0x00, 0xff },
 317                 { 0x00088, 0x01, 0xff },
 318                 { 0x00081, 0x00, 0xff },
 319                 { 0x00080, 0x00, 0xff },
 320         };
 321
 322         dev_dbg(&client->dev, "\n");
 323
 324         priv->delivery_system = SYS_UNDEFINED;
 325
 326         ret = cxd2820r_wr_reg_val_mask_tab(priv, tab, ARRAY_SIZE(tab));
 327         if (ret)
 328                 goto error;
 329
 330         return ret;
 331 error:
 332         dev_dbg(&client->dev, "failed=%d\n", ret);
 333         return ret;
 334 }
 335
 336 int cxd2820r_get_tune_settings_c(struct dvb_frontend *fe,
 337         struct dvb_frontend_tune_settings *s)
 338 {
 339         s->min_delay_ms = 500;
 340         s->step_size = 0; /* no zigzag */
 341         s->max_drift = 0;
 342
 343         return 0;
 344 }