kernel/drivers/media/dvb-frontends/horus3a.c

   1 /*
   2  * horus3a.h
   3  *
   4  * Sony Horus3A DVB-S/S2 tuner driver
   5  *
   6  * Copyright 2012 Sony Corporation
   7  * Copyright (C) 2014 NetUP Inc.
   8  * Copyright (C) 2014 Sergey Kozlov <serjk@netup.ru>
   9  * Copyright (C) 2014 Abylay Ospan <aospan@netup.ru>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  */
  21
  22 #include <linux/slab.h>
  23 #include <linux/module.h>
  24 #include <linux/dvb/frontend.h>
  25 #include <linux/types.h>
  26 #include "horus3a.h"
  27 #include "dvb_frontend.h"
  28
  29 #define MAX_WRITE_REGSIZE      5
  30
  31 enum horus3a_state {
  32         STATE_UNKNOWN,
  33         STATE_SLEEP,
  34         STATE_ACTIVE
  35 };
  36
  37 struct horus3a_priv {
  38         u32                     frequency;
  39         u8                      i2c_address;
  40         struct i2c_adapter      *i2c;
  41         enum horus3a_state      state;
  42         void                    *set_tuner_data;
  43         int                     (*set_tuner)(void *, int);
  44 };
  45
  46 static void horus3a_i2c_debug(struct horus3a_priv *priv,
  47                               u8 reg, u8 write, const u8 *data, u32 len)
  48 {
  49         dev_dbg(&priv->i2c->dev, "horus3a: I2C %s reg 0x%02x size %d\n",
  50                 (write == 0 ? "read" : "write"), reg, len);
  51         print_hex_dump_bytes("horus3a: I2C data: ",
  52                 DUMP_PREFIX_OFFSET, data, len);
  53 }
  54
  55 static int horus3a_write_regs(struct horus3a_priv *priv,
  56                               u8 reg, const u8 *data, u32 len)
  57 {
  58         int ret;
  59         u8 buf[MAX_WRITE_REGSIZE + 1];
  60         struct i2c_msg msg[1] = {
  61                 {
  62                         .addr = priv->i2c_address,
  63                         .flags = 0,
  64                         .len = len + 1,
  65                         .buf = buf,
  66                 }
  67         };
  68
  69         if (len + 1 >= sizeof(buf)) {
  70                 dev_warn(&priv->i2c->dev,"wr reg=%04x: len=%d is too big!\n",
  71                          reg, len + 1);
  72                 return -E2BIG;
  73         }
  74
  75         horus3a_i2c_debug(priv, reg, 1, data, len);
  76         buf[0] = reg;
  77         memcpy(&buf[1], data, len);
  78         ret = i2c_transfer(priv->i2c, msg, 1);
  79         if (ret >= 0 && ret != 1)
  80                 ret = -EREMOTEIO;
  81         if (ret < 0) {
  82                 dev_warn(&priv->i2c->dev,
  83                         "%s: i2c wr failed=%d reg=%02x len=%d\n",
  84                         KBUILD_MODNAME, ret, reg, len);
  85                 return ret;
  86         }
  87         return 0;
  88 }
  89
  90 static int horus3a_write_reg(struct horus3a_priv *priv, u8 reg, u8 val)
  91 {
  92         return horus3a_write_regs(priv, reg, &val, 1);
  93 }
  94
  95 static int horus3a_enter_power_save(struct horus3a_priv *priv)
  96 {
  97         u8 data[2];
  98
  99         dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
 100         if (priv->state == STATE_SLEEP)
 101                 return 0;
 102         /* IQ Generator disable */
 103         horus3a_write_reg(priv, 0x2a, 0x79);
 104         /* MDIV_EN = 0 */
 105         horus3a_write_reg(priv, 0x29, 0x70);
 106         /* VCO disable preparation */
 107         horus3a_write_reg(priv, 0x28, 0x3e);
 108         /* VCO buffer disable */
 109         horus3a_write_reg(priv, 0x2a, 0x19);
 110         /* VCO calibration disable */
 111         horus3a_write_reg(priv, 0x1c, 0x00);
 112         /* Power save setting (xtal is not stopped) */
 113         data[0] = 0xC0;
 114         /* LNA is Disabled */
 115         data[1] = 0xA7;
 116         /* 0x11 - 0x12 */
 117         horus3a_write_regs(priv, 0x11, data, sizeof(data));
 118         priv->state = STATE_SLEEP;
 119         return 0;
 120 }
 121
 122 static int horus3a_leave_power_save(struct horus3a_priv *priv)
 123 {
 124         u8 data[2];
 125
 126         dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
 127         if (priv->state == STATE_ACTIVE)
 128                 return 0;
 129         /* Leave power save */
 130         data[0] = 0x00;
 131         /* LNA is Disabled */
 132         data[1] = 0xa7;
 133         /* 0x11 - 0x12 */
 134         horus3a_write_regs(priv, 0x11, data, sizeof(data));
 135         /* VCO buffer enable */
 136         horus3a_write_reg(priv, 0x2a, 0x79);
 137         /* VCO calibration enable */
 138         horus3a_write_reg(priv, 0x1c, 0xc0);
 139         /* MDIV_EN = 1 */
 140         horus3a_write_reg(priv, 0x29, 0x71);
 141         usleep_range(5000, 7000);
 142         priv->state = STATE_ACTIVE;
 143         return 0;
 144 }
 145
 146 static int horus3a_init(struct dvb_frontend *fe)
 147 {
 148         struct horus3a_priv *priv = fe->tuner_priv;
 149
 150         dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
 151         return 0;
 152 }
 153
 154 static int horus3a_release(struct dvb_frontend *fe)
 155 {
 156         struct horus3a_priv *priv = fe->tuner_priv;
 157
 158         dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
 159         kfree(fe->tuner_priv);
 160         fe->tuner_priv = NULL;
 161         return 0;
 162 }
 163
 164 static int horus3a_sleep(struct dvb_frontend *fe)
 165 {
 166         struct horus3a_priv *priv = fe->tuner_priv;
 167
 168         dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
 169         horus3a_enter_power_save(priv);
 170         return 0;
 171 }
 172
 173 static int horus3a_set_params(struct dvb_frontend *fe)
 174 {
 175         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 176         struct horus3a_priv *priv = fe->tuner_priv;
 177         u32 frequency = p->frequency;
 178         u32 symbol_rate = p->symbol_rate/1000;
 179         u8 mixdiv = 0;
 180         u8 mdiv = 0;
 181         u32 ms = 0;
 182         u8 f_ctl = 0;
 183         u8 g_ctl = 0;
 184         u8 fc_lpf = 0;
 185         u8 data[5];
 186
 187         dev_dbg(&priv->i2c->dev, "%s(): frequency %dkHz symbol_rate %dksps\n",
 188                 __func__, frequency, symbol_rate);
 189         if (priv->set_tuner)
 190                 priv->set_tuner(priv->set_tuner_data, 0);
 191         if (priv->state == STATE_SLEEP)
 192                 horus3a_leave_power_save(priv);
 193
 194         /* frequency should be X MHz (X : integer) */
 195         frequency = DIV_ROUND_CLOSEST(frequency, 1000) * 1000;
 196         if (frequency <= 1155000) {
 197                 mixdiv = 4;
 198                 mdiv = 1;
 199         } else {
 200                 mixdiv = 2;
 201                 mdiv = 0;
 202         }
 203         /* Assumed that fREF == 1MHz (1000kHz) */
 204         ms = DIV_ROUND_CLOSEST((frequency * mixdiv) / 2, 1000);
 205         if (ms > 0x7FFF) { /* 15 bit */
 206                 dev_err(&priv->i2c->dev, "horus3a: invalid frequency %d\n",
 207                         frequency);
 208                 return -EINVAL;
 209         }
 210         if (frequency < 975000) {
 211                 /* F_CTL=11100 G_CTL=001 */
 212                 f_ctl = 0x1C;
 213                 g_ctl = 0x01;
 214         } else if (frequency < 1050000) {
 215                 /* F_CTL=11000 G_CTL=010 */
 216                 f_ctl = 0x18;
 217                 g_ctl = 0x02;
 218         } else if (frequency < 1150000) {
 219                 /* F_CTL=10100 G_CTL=010 */
 220                 f_ctl = 0x14;
 221                 g_ctl = 0x02;
 222         } else if (frequency < 1250000) {
 223                 /* F_CTL=10000 G_CTL=011 */
 224                 f_ctl = 0x10;
 225                 g_ctl = 0x03;
 226         } else if (frequency < 1350000) {
 227                 /* F_CTL=01100 G_CTL=100 */
 228                 f_ctl = 0x0C;
 229                 g_ctl = 0x04;
 230         } else if (frequency < 1450000) {
 231                 /* F_CTL=01010 G_CTL=100 */
 232                 f_ctl = 0x0A;
 233                 g_ctl = 0x04;
 234         } else if (frequency < 1600000) {
 235                 /* F_CTL=00111 G_CTL=101 */
 236                 f_ctl = 0x07;
 237                 g_ctl = 0x05;
 238         } else if (frequency < 1800000) {
 239                 /* F_CTL=00100 G_CTL=010 */
 240                 f_ctl = 0x04;
 241                 g_ctl = 0x02;
 242         } else if (frequency < 2000000) {
 243                 /* F_CTL=00010 G_CTL=001 */
 244                 f_ctl = 0x02;
 245                 g_ctl = 0x01;
 246         } else {
 247                 /* F_CTL=00000 G_CTL=000 */
 248                 f_ctl = 0x00;
 249                 g_ctl = 0x00;
 250         }
 251         /* LPF cutoff frequency setting */
 252         if (p->delivery_system == SYS_DVBS) {
 253                 /*
 254                  * rolloff = 0.35
 255                  * SR <= 4.3
 256                  * fc_lpf = 5
 257                  * 4.3 < SR <= 10
 258                  * fc_lpf = SR * (1 + rolloff) / 2 + SR / 2 =
 259                  *      SR * 1.175 = SR * (47/40)
 260                  * 10 < SR
 261                  * fc_lpf = SR * (1 + rolloff) / 2 + 5 =
 262                  *      SR * 0.675 + 5 = SR * (27/40) + 5
 263                  * NOTE: The result should be round up.
 264                  */
 265                 if (symbol_rate <= 4300)
 266                         fc_lpf = 5;
 267                 else if (symbol_rate <= 10000)
 268                         fc_lpf = (u8)DIV_ROUND_UP(symbol_rate * 47, 40000);
 269                 else
 270                         fc_lpf = (u8)DIV_ROUND_UP(symbol_rate * 27, 40000) + 5;
 271                 /* 5 <= fc_lpf <= 36 */
 272                 if (fc_lpf > 36)
 273                         fc_lpf = 36;
 274         } else if (p->delivery_system == SYS_DVBS2) {
 275                 int rolloff;
 276
 277                 switch (p->rolloff) {
 278                 case ROLLOFF_35:
 279                         rolloff = 35;
 280                         break;
 281                 case ROLLOFF_25:
 282                         rolloff = 25;
 283                         break;
 284                 case ROLLOFF_20:
 285                         rolloff = 20;
 286                         break;
 287                 case ROLLOFF_AUTO:
 288                 default:
 289                         dev_err(&priv->i2c->dev,
 290                                 "horus3a: auto roll-off is not supported\n");
 291                         return -EINVAL;
 292                 }
 293                 /*
 294                  * SR <= 4.5:
 295                  * fc_lpf = 5
 296                  * 4.5 < SR <= 10:
 297                  * fc_lpf = SR * (1 + rolloff) / 2 + SR / 2
 298                  * 10 < SR:
 299                  * fc_lpf = SR * (1 + rolloff) / 2 + 5
 300                  * NOTE: The result should be round up.
 301                  */
 302                 if (symbol_rate <= 4500)
 303                         fc_lpf = 5;
 304                 else if (symbol_rate <= 10000)
 305                         fc_lpf = (u8)DIV_ROUND_UP(
 306                                 symbol_rate * (200 + rolloff), 200000);
 307                 else
 308                         fc_lpf = (u8)DIV_ROUND_UP(
 309                                 symbol_rate * (100 + rolloff), 200000) + 5;
 310                 /* 5 <= fc_lpf <= 36 is valid */
 311                 if (fc_lpf > 36)
 312                         fc_lpf = 36;
 313         } else {
 314                 dev_err(&priv->i2c->dev,
 315                         "horus3a: invalid delivery system %d\n",
 316                         p->delivery_system);
 317                 return -EINVAL;
 318         }
 319         /* 0x00 - 0x04 */
 320         data[0] = (u8)((ms >> 7) & 0xFF);
 321         data[1] = (u8)((ms << 1) & 0xFF);
 322         data[2] = 0x00;
 323         data[3] = 0x00;
 324         data[4] = (u8)(mdiv << 7);
 325         horus3a_write_regs(priv, 0x00, data, sizeof(data));
 326         /* Write G_CTL, F_CTL */
 327         horus3a_write_reg(priv, 0x09, (u8)((g_ctl << 5) | f_ctl));
 328         /* Write LPF cutoff frequency */
 329         horus3a_write_reg(priv, 0x37, (u8)(0x80 | (fc_lpf << 1)));
 330         /* Start Calibration */
 331         horus3a_write_reg(priv, 0x05, 0x80);
 332         /* IQ Generator enable */
 333         horus3a_write_reg(priv, 0x2a, 0x7b);
 334         /* tuner stabilization time */
 335         msleep(60);
 336         /* Store tuned frequency to the struct */
 337         priv->frequency = ms * 2 * 1000 / mixdiv;
 338         return 0;
 339 }
 340
 341 static int horus3a_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 342 {
 343         struct horus3a_priv *priv = fe->tuner_priv;
 344
 345         *frequency = priv->frequency;
 346         return 0;
 347 }
 348
 349 static struct dvb_tuner_ops horus3a_tuner_ops = {
 350         .info = {
 351                 .name = "Sony Horus3a",
 352                 .frequency_min = 950000,
 353                 .frequency_max = 2150000,
 354                 .frequency_step = 1000,
 355         },
 356         .init = horus3a_init,
 357         .release = horus3a_release,
 358         .sleep = horus3a_sleep,
 359         .set_params = horus3a_set_params,
 360         .get_frequency = horus3a_get_frequency,
 361 };
 362
 363 struct dvb_frontend *horus3a_attach(struct dvb_frontend *fe,
 364                                     const struct horus3a_config *config,
 365                                     struct i2c_adapter *i2c)
 366 {
 367         u8 buf[3], val;
 368         struct horus3a_priv *priv = NULL;
 369
 370         priv = kzalloc(sizeof(struct horus3a_priv), GFP_KERNEL);
 371         if (priv == NULL)
 372                 return NULL;
 373         priv->i2c_address = (config->i2c_address >> 1);
 374         priv->i2c = i2c;
 375         priv->set_tuner_data = config->set_tuner_priv;
 376         priv->set_tuner = config->set_tuner_callback;
 377
 378         if (fe->ops.i2c_gate_ctrl)
 379                 fe->ops.i2c_gate_ctrl(fe, 1);
 380
 381         /* wait 4ms after power on */
 382         usleep_range(4000, 6000);
 383         /* IQ Generator disable */
 384         horus3a_write_reg(priv, 0x2a, 0x79);
 385         /* REF_R = Xtal Frequency */
 386         buf[0] = config->xtal_freq_mhz;
 387         buf[1] = config->xtal_freq_mhz;
 388         buf[2] = 0;
 389         /* 0x6 - 0x8 */
 390         horus3a_write_regs(priv, 0x6, buf, 3);
 391         /* IQ Out = Single Ended */
 392         horus3a_write_reg(priv, 0x0a, 0x40);
 393         switch (config->xtal_freq_mhz) {
 394         case 27:
 395                 val = 0x1f;
 396                 break;
 397         case 24:
 398                 val = 0x10;
 399                 break;
 400         case 16:
 401                 val = 0xc;
 402                 break;
 403         default:
 404                 val = 0;
 405                 dev_warn(&priv->i2c->dev,
 406                         "horus3a: invalid xtal frequency %dMHz\n",
 407                         config->xtal_freq_mhz);
 408                 break;
 409         }
 410         val <<= 2;
 411         horus3a_write_reg(priv, 0x0e, val);
 412         horus3a_enter_power_save(priv);
 413         usleep_range(3000, 5000);
 414
 415         if (fe->ops.i2c_gate_ctrl)
 416                 fe->ops.i2c_gate_ctrl(fe, 0);
 417
 418         memcpy(&fe->ops.tuner_ops, &horus3a_tuner_ops,
 419                                 sizeof(struct dvb_tuner_ops));
 420         fe->tuner_priv = priv;
 421         dev_info(&priv->i2c->dev,
 422                 "Sony HORUS3A attached on addr=%x at I2C adapter %p\n",
 423                 priv->i2c_address, priv->i2c);
 424         return fe;
 425 }
 426 EXPORT_SYMBOL(horus3a_attach);
 427
 428 MODULE_DESCRIPTION("Sony HORUS3A sattelite tuner driver");
 429 MODULE_AUTHOR("Sergey Kozlov <serjk@netup.ru>");
 430 MODULE_LICENSE("GPL");