drivers/media/tuners/it913x.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * ITE IT913X silicon tuner driver
   4  *
   5  *  Copyright (C) 2011 Malcolm Priestley (tvboxspy@gmail.com)
   6  *  IT9137 Copyright (C) ITE Tech Inc.
   7  */
   8
   9 #include "it913x.h"
  10 #include <linux/platform_device.h>
  11 #include <linux/regmap.h>
  12
  13 struct it913x_dev {
  14         struct platform_device *pdev;
  15         struct regmap *regmap;
  16         struct dvb_frontend *fe;
  17         u8 chip_ver:2;
  18         u8 role:2;
  19         u16 xtal;
  20         u8 fdiv;
  21         u8 clk_mode;
  22         u32 fn_min;
  23         bool active;
  24 };
  25
  26 static int it913x_init(struct dvb_frontend *fe)
  27 {
  28         struct it913x_dev *dev = fe->tuner_priv;
  29         struct platform_device *pdev = dev->pdev;
  30         int ret;
  31         unsigned int utmp;
  32         u8 iqik_m_cal, nv_val, buf[2];
  33         static const u8 nv[] = {48, 32, 24, 16, 12, 8, 6, 4, 2};
  34         unsigned long timeout;
  35
  36         dev_dbg(&pdev->dev, "role %u\n", dev->role);
  37
  38         ret = regmap_write(dev->regmap, 0x80ec4c, 0x68);
  39         if (ret)
  40                 goto err;
  41
  42         usleep_range(10000, 100000);
  43
  44         ret = regmap_read(dev->regmap, 0x80ec86, &utmp);
  45         if (ret)
  46                 goto err;
  47
  48         switch (utmp) {
  49         case 0:
  50                 /* 12.000 MHz */
  51                 dev->clk_mode = utmp;
  52                 dev->xtal = 2000;
  53                 dev->fdiv = 3;
  54                 iqik_m_cal = 16;
  55                 break;
  56         case 1:
  57                 /* 20.480 MHz */
  58                 dev->clk_mode = utmp;
  59                 dev->xtal = 640;
  60                 dev->fdiv = 1;
  61                 iqik_m_cal = 6;
  62                 break;
  63         default:
  64                 dev_err(&pdev->dev, "unknown clock identifier %d\n", utmp);
  65                 ret = -EINVAL;
  66                 goto err;
  67         }
  68
  69         ret = regmap_read(dev->regmap, 0x80ed03,  &utmp);
  70         if (ret)
  71                 goto err;
  72
  73         else if (utmp < ARRAY_SIZE(nv))
  74                 nv_val = nv[utmp];
  75         else
  76                 nv_val = 2;
  77
  78         #define TIMEOUT 50
  79         timeout = jiffies + msecs_to_jiffies(TIMEOUT);
  80         while (!time_after(jiffies, timeout)) {
  81                 ret = regmap_bulk_read(dev->regmap, 0x80ed23, buf, 2);
  82                 if (ret)
  83                         goto err;
  84
  85                 utmp = (buf[1] << 8) | (buf[0] << 0);
  86                 if (utmp)
  87                         break;
  88         }
  89
  90         dev_dbg(&pdev->dev, "r_fbc_m_bdry took %u ms, val %u\n",
  91                         jiffies_to_msecs(jiffies) -
  92                         (jiffies_to_msecs(timeout) - TIMEOUT), utmp);
  93
  94         dev->fn_min = dev->xtal * utmp;
  95         dev->fn_min /= (dev->fdiv * nv_val);
  96         dev->fn_min *= 1000;
  97         dev_dbg(&pdev->dev, "fn_min %u\n", dev->fn_min);
  98
  99         /*
 100          * Chip version BX never sets that flag so we just wait 50ms in that
 101          * case. It is possible poll BX similarly than AX and then timeout in
 102          * order to get 50ms delay, but that causes about 120 extra I2C
 103          * messages. As for now, we just wait and reduce IO.
 104          */
 105         if (dev->chip_ver == 1) {
 106                 #define TIMEOUT 50
 107                 timeout = jiffies + msecs_to_jiffies(TIMEOUT);
 108                 while (!time_after(jiffies, timeout)) {
 109                         ret = regmap_read(dev->regmap, 0x80ec82, &utmp);
 110                         if (ret)
 111                                 goto err;
 112
 113                         if (utmp)
 114                                 break;
 115                 }
 116
 117                 dev_dbg(&pdev->dev, "p_tsm_init_mode took %u ms, val %u\n",
 118                                 jiffies_to_msecs(jiffies) -
 119                                 (jiffies_to_msecs(timeout) - TIMEOUT), utmp);
 120         } else {
 121                 msleep(50);
 122         }
 123
 124         ret = regmap_write(dev->regmap, 0x80ed81, iqik_m_cal);
 125         if (ret)
 126                 goto err;
 127
 128         ret = regmap_write(dev->regmap, 0x80ec57, 0x00);
 129         if (ret)
 130                 goto err;
 131
 132         ret = regmap_write(dev->regmap, 0x80ec58, 0x00);
 133         if (ret)
 134                 goto err;
 135
 136         ret = regmap_write(dev->regmap, 0x80ec40, 0x01);
 137         if (ret)
 138                 goto err;
 139
 140         dev->active = true;
 141
 142         return 0;
 143 err:
 144         dev_dbg(&pdev->dev, "failed %d\n", ret);
 145         return ret;
 146 }
 147
 148 static int it913x_sleep(struct dvb_frontend *fe)
 149 {
 150         struct it913x_dev *dev = fe->tuner_priv;
 151         struct platform_device *pdev = dev->pdev;
 152         int ret, len;
 153
 154         dev_dbg(&pdev->dev, "role %u\n", dev->role);
 155
 156         dev->active = false;
 157
 158         ret  = regmap_bulk_write(dev->regmap, 0x80ec40, "\x00", 1);
 159         if (ret)
 160                 goto err;
 161
 162         /*
 163          * Writing '0x00' to master tuner register '0x80ec08' causes slave tuner
 164          * communication lost. Due to that, we cannot put master full sleep.
 165          */
 166         if (dev->role == IT913X_ROLE_DUAL_MASTER)
 167                 len = 4;
 168         else
 169                 len = 15;
 170
 171         dev_dbg(&pdev->dev, "role %u, len %d\n", dev->role, len);
 172
 173         ret = regmap_bulk_write(dev->regmap, 0x80ec02,
 174                         "\x3f\x1f\x3f\x3e\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
 175                         len);
 176         if (ret)
 177                 goto err;
 178
 179         ret = regmap_bulk_write(dev->regmap, 0x80ec12, "\x00\x00\x00\x00", 4);
 180         if (ret)
 181                 goto err;
 182
 183         ret = regmap_bulk_write(dev->regmap, 0x80ec17,
 184                         "\x00\x00\x00\x00\x00\x00\x00\x00\x00", 9);
 185         if (ret)
 186                 goto err;
 187
 188         ret = regmap_bulk_write(dev->regmap, 0x80ec22,
 189                         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 10);
 190         if (ret)
 191                 goto err;
 192
 193         ret = regmap_bulk_write(dev->regmap, 0x80ec20, "\x00", 1);
 194         if (ret)
 195                 goto err;
 196
 197         ret = regmap_bulk_write(dev->regmap, 0x80ec3f, "\x01", 1);
 198         if (ret)
 199                 goto err;
 200
 201         return 0;
 202 err:
 203         dev_dbg(&pdev->dev, "failed %d\n", ret);
 204         return ret;
 205 }
 206
 207 static int it913x_set_params(struct dvb_frontend *fe)
 208 {
 209         struct it913x_dev *dev = fe->tuner_priv;
 210         struct platform_device *pdev = dev->pdev;
 211         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 212         int ret;
 213         unsigned int utmp;
 214         u32 pre_lo_freq, t_cal_freq;
 215         u16 iqik_m_cal, n_div;
 216         u8 u8tmp, n, l_band, lna_band;
 217
 218         dev_dbg(&pdev->dev, "role=%u, frequency %u, bandwidth_hz %u\n",
 219                         dev->role, c->frequency, c->bandwidth_hz);
 220
 221         if (!dev->active) {
 222                 ret = -EINVAL;
 223                 goto err;
 224         }
 225
 226         if (c->frequency <=         74000000) {
 227                 n_div = 48;
 228                 n = 0;
 229         } else if (c->frequency <= 111000000) {
 230                 n_div = 32;
 231                 n = 1;
 232         } else if (c->frequency <= 148000000) {
 233                 n_div = 24;
 234                 n = 2;
 235         } else if (c->frequency <= 222000000) {
 236                 n_div = 16;
 237                 n = 3;
 238         } else if (c->frequency <= 296000000) {
 239                 n_div = 12;
 240                 n = 4;
 241         } else if (c->frequency <= 445000000) {
 242                 n_div = 8;
 243                 n = 5;
 244         } else if (c->frequency <= dev->fn_min) {
 245                 n_div = 6;
 246                 n = 6;
 247         } else if (c->frequency <= 950000000) {
 248                 n_div = 4;
 249                 n = 7;
 250         } else {
 251                 n_div = 2;
 252                 n = 0;
 253         }
 254
 255         ret = regmap_read(dev->regmap, 0x80ed81, &utmp);
 256         if (ret)
 257                 goto err;
 258
 259         iqik_m_cal = utmp * n_div;
 260
 261         if (utmp < 0x20) {
 262                 if (dev->clk_mode == 0)
 263                         iqik_m_cal = (iqik_m_cal * 9) >> 5;
 264                 else
 265                         iqik_m_cal >>= 1;
 266         } else {
 267                 iqik_m_cal = 0x40 - iqik_m_cal;
 268                 if (dev->clk_mode == 0)
 269                         iqik_m_cal = ~((iqik_m_cal * 9) >> 5);
 270                 else
 271                         iqik_m_cal = ~(iqik_m_cal >> 1);
 272         }
 273
 274         t_cal_freq = (c->frequency / 1000) * n_div * dev->fdiv;
 275         pre_lo_freq = t_cal_freq / dev->xtal;
 276         utmp = pre_lo_freq * dev->xtal;
 277
 278         if ((t_cal_freq - utmp) >= (dev->xtal >> 1))
 279                 pre_lo_freq++;
 280
 281         pre_lo_freq += (u32) n << 13;
 282         /* Frequency OMEGA_IQIK_M_CAL_MID*/
 283         t_cal_freq = pre_lo_freq + (u32)iqik_m_cal;
 284         dev_dbg(&pdev->dev, "t_cal_freq %u, pre_lo_freq %u\n",
 285                         t_cal_freq, pre_lo_freq);
 286
 287         if (c->frequency <=         440000000) {
 288                 l_band = 0;
 289                 lna_band = 0;
 290         } else if (c->frequency <=  484000000) {
 291                 l_band = 1;
 292                 lna_band = 1;
 293         } else if (c->frequency <=  533000000) {
 294                 l_band = 1;
 295                 lna_band = 2;
 296         } else if (c->frequency <=  587000000) {
 297                 l_band = 1;
 298                 lna_band = 3;
 299         } else if (c->frequency <=  645000000) {
 300                 l_band = 1;
 301                 lna_band = 4;
 302         } else if (c->frequency <=  710000000) {
 303                 l_band = 1;
 304                 lna_band = 5;
 305         } else if (c->frequency <=  782000000) {
 306                 l_band = 1;
 307                 lna_band = 6;
 308         } else if (c->frequency <=  860000000) {
 309                 l_band = 1;
 310                 lna_band = 7;
 311         } else if (c->frequency <= 1492000000) {
 312                 l_band = 1;
 313                 lna_band = 0;
 314         } else if (c->frequency <= 1685000000) {
 315                 l_band = 1;
 316                 lna_band = 1;
 317         } else {
 318                 ret = -EINVAL;
 319                 goto err;
 320         }
 321
 322         /* XXX: latest windows driver does not set that at all */
 323         ret = regmap_write(dev->regmap, 0x80ee06, lna_band);
 324         if (ret)
 325                 goto err;
 326
 327         if (c->bandwidth_hz <=      5000000)
 328                 u8tmp = 0;
 329         else if (c->bandwidth_hz <= 6000000)
 330                 u8tmp = 2;
 331         else if (c->bandwidth_hz <= 7000000)
 332                 u8tmp = 4;
 333         else
 334                 u8tmp = 6;       /* 8000000 */
 335
 336         ret = regmap_write(dev->regmap, 0x80ec56, u8tmp);
 337         if (ret)
 338                 goto err;
 339
 340         /* XXX: latest windows driver sets different value (a8 != 68) */
 341         ret = regmap_write(dev->regmap, 0x80ec4c, 0xa0 | (l_band << 3));
 342         if (ret)
 343                 goto err;
 344
 345         ret = regmap_write(dev->regmap, 0x80ec4d, (t_cal_freq >> 0) & 0xff);
 346         if (ret)
 347                 goto err;
 348
 349         ret = regmap_write(dev->regmap, 0x80ec4e, (t_cal_freq >> 8) & 0xff);
 350         if (ret)
 351                 goto err;
 352
 353         ret = regmap_write(dev->regmap, 0x80011e, (pre_lo_freq >> 0) & 0xff);
 354         if (ret)
 355                 goto err;
 356
 357         ret = regmap_write(dev->regmap, 0x80011f, (pre_lo_freq >> 8) & 0xff);
 358         if (ret)
 359                 goto err;
 360
 361         return 0;
 362 err:
 363         dev_dbg(&pdev->dev, "failed %d\n", ret);
 364         return ret;
 365 }
 366
 367 static const struct dvb_tuner_ops it913x_tuner_ops = {
 368         .info = {
 369                 .name             = "ITE IT913X",
 370                 .frequency_min_hz = 174 * MHz,
 371                 .frequency_max_hz = 862 * MHz,
 372         },
 373
 374         .init = it913x_init,
 375         .sleep = it913x_sleep,
 376         .set_params = it913x_set_params,
 377 };
 378
 379 static int it913x_probe(struct platform_device *pdev)
 380 {
 381         struct it913x_platform_data *pdata = pdev->dev.platform_data;
 382         struct dvb_frontend *fe = pdata->fe;
 383         struct it913x_dev *dev;
 384         const struct platform_device_id *id = platform_get_device_id(pdev);
 385         int ret;
 386         char *chip_ver_str;
 387
 388         dev = kzalloc(sizeof(struct it913x_dev), GFP_KERNEL);
 389         if (dev == NULL) {
 390                 ret = -ENOMEM;
 391                 dev_err(&pdev->dev, "kzalloc() failed\n");
 392                 goto err;
 393         }
 394
 395         dev->pdev = pdev;
 396         dev->regmap = pdata->regmap;
 397         dev->fe = pdata->fe;
 398         dev->chip_ver = id->driver_data;
 399         dev->role = pdata->role;
 400
 401         fe->tuner_priv = dev;
 402         memcpy(&fe->ops.tuner_ops, &it913x_tuner_ops,
 403                         sizeof(struct dvb_tuner_ops));
 404         platform_set_drvdata(pdev, dev);
 405
 406         if (dev->chip_ver == 1)
 407                 chip_ver_str = "AX";
 408         else if (dev->chip_ver == 2)
 409                 chip_ver_str = "BX";
 410         else
 411                 chip_ver_str = "??";
 412
 413         dev_info(&pdev->dev, "ITE IT913X %s successfully attached\n",
 414                  chip_ver_str);
 415         dev_dbg(&pdev->dev, "chip_ver %u, role %u\n", dev->chip_ver, dev->role);
 416         return 0;
 417 err:
 418         dev_dbg(&pdev->dev, "failed %d\n", ret);
 419         return ret;
 420 }
 421
 422 static int it913x_remove(struct platform_device *pdev)
 423 {
 424         struct it913x_dev *dev = platform_get_drvdata(pdev);
 425         struct dvb_frontend *fe = dev->fe;
 426
 427         dev_dbg(&pdev->dev, "\n");
 428
 429         memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
 430         fe->tuner_priv = NULL;
 431         kfree(dev);
 432
 433         return 0;
 434 }
 435
 436 static const struct platform_device_id it913x_id_table[] = {
 437         {"it9133ax-tuner", 1},
 438         {"it9133bx-tuner", 2},
 439         {},
 440 };
 441 MODULE_DEVICE_TABLE(platform, it913x_id_table);
 442
 443 static struct platform_driver it913x_driver = {
 444         .driver = {
 445                 .name   = "it913x",
 446                 .suppress_bind_attrs    = true,
 447         },
 448         .probe          = it913x_probe,
 449         .remove         = it913x_remove,
 450         .id_table       = it913x_id_table,
 451 };
 452
 453 module_platform_driver(it913x_driver);
 454
 455 MODULE_DESCRIPTION("ITE IT913X silicon tuner driver");
 456 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 457 MODULE_LICENSE("GPL");