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 void 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 }
 162
 163 static int horus3a_sleep(struct dvb_frontend *fe)
 164 {
 165         struct horus3a_priv *priv = fe->tuner_priv;
 166
 167         dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
 168         horus3a_enter_power_save(priv);
 169         return 0;
 170 }
 171
 172 static int horus3a_set_params(struct dvb_frontend *fe)
 173 {
 174         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 175         struct horus3a_priv *priv = fe->tuner_priv;
 176         u32 frequency = p->frequency;
 177         u32 symbol_rate = p->symbol_rate/1000;
 178         u8 mixdiv = 0;
 179         u8 mdiv = 0;
 180         u32 ms = 0;
 181         u8 f_ctl = 0;
 182         u8 g_ctl = 0;
 183         u8 fc_lpf = 0;
 184         u8 data[5];
 185
 186         dev_dbg(&priv->i2c->dev, "%s(): frequency %dkHz symbol_rate %dksps\n",
 187                 __func__, frequency, symbol_rate);
 188         if (priv->set_tuner)
 189                 priv->set_tuner(priv->set_tuner_data, 0);
 190         if (priv->state == STATE_SLEEP)
 191                 horus3a_leave_power_save(priv);
 192
 193         /* frequency should be X MHz (X : integer) */
 194         frequency = DIV_ROUND_CLOSEST(frequency, 1000) * 1000;
 195         if (frequency <= 1155000) {
 196                 mixdiv = 4;
 197                 mdiv = 1;
 198         } else {
 199                 mixdiv = 2;
 200                 mdiv = 0;
 201         }
 202         /* Assumed that fREF == 1MHz (1000kHz) */
 203         ms = DIV_ROUND_CLOSEST((frequency * mixdiv) / 2, 1000);
 204         if (ms > 0x7FFF) { /* 15 bit */
 205                 dev_err(&priv->i2c->dev, "horus3a: invalid frequency %d\n",
 206                         frequency);
 207                 return -EINVAL;
 208         }
 209         if (frequency < 975000) {
 210                 /* F_CTL=11100 G_CTL=001 */
 211                 f_ctl = 0x1C;
 212                 g_ctl = 0x01;
 213         } else if (frequency < 1050000) {
 214                 /* F_CTL=11000 G_CTL=010 */
 215                 f_ctl = 0x18;
 216                 g_ctl = 0x02;
 217         } else if (frequency < 1150000) {
 218                 /* F_CTL=10100 G_CTL=010 */
 219                 f_ctl = 0x14;
 220                 g_ctl = 0x02;
 221         } else if (frequency < 1250000) {
 222                 /* F_CTL=10000 G_CTL=011 */
 223                 f_ctl = 0x10;
 224                 g_ctl = 0x03;
 225         } else if (frequency < 1350000) {
 226                 /* F_CTL=01100 G_CTL=100 */
 227                 f_ctl = 0x0C;
 228                 g_ctl = 0x04;
 229         } else if (frequency < 1450000) {
 230                 /* F_CTL=01010 G_CTL=100 */
 231                 f_ctl = 0x0A;
 232                 g_ctl = 0x04;
 233         } else if (frequency < 1600000) {
 234                 /* F_CTL=00111 G_CTL=101 */
 235                 f_ctl = 0x07;
 236                 g_ctl = 0x05;
 237         } else if (frequency < 1800000) {
 238                 /* F_CTL=00100 G_CTL=010 */
 239                 f_ctl = 0x04;
 240                 g_ctl = 0x02;
 241         } else if (frequency < 2000000) {
 242                 /* F_CTL=00010 G_CTL=001 */
 243                 f_ctl = 0x02;
 244                 g_ctl = 0x01;
 245         } else {
 246                 /* F_CTL=00000 G_CTL=000 */
 247                 f_ctl = 0x00;
 248                 g_ctl = 0x00;
 249         }
 250         /* LPF cutoff frequency setting */
 251         if (p->delivery_system == SYS_DVBS) {
 252                 /*
 253                  * rolloff = 0.35
 254                  * SR <= 4.3
 255                  * fc_lpf = 5
 256                  * 4.3 < SR <= 10
 257                  * fc_lpf = SR * (1 + rolloff) / 2 + SR / 2 =
 258                  *      SR * 1.175 = SR * (47/40)
 259                  * 10 < SR
 260                  * fc_lpf = SR * (1 + rolloff) / 2 + 5 =
 261                  *      SR * 0.675 + 5 = SR * (27/40) + 5
 262                  * NOTE: The result should be round up.
 263                  */
 264                 if (symbol_rate <= 4300)
 265                         fc_lpf = 5;
 266                 else if (symbol_rate <= 10000)
 267                         fc_lpf = (u8)DIV_ROUND_UP(symbol_rate * 47, 40000);
 268                 else
 269                         fc_lpf = (u8)DIV_ROUND_UP(symbol_rate * 27, 40000) + 5;
 270                 /* 5 <= fc_lpf <= 36 */
 271                 if (fc_lpf > 36)
 272                         fc_lpf = 36;
 273         } else if (p->delivery_system == SYS_DVBS2) {
 274                 /*
 275                  * SR <= 4.5:
 276                  * fc_lpf = 5
 277                  * 4.5 < SR <= 10:
 278                  * fc_lpf = SR * (1 + rolloff) / 2 + SR / 2
 279                  * 10 < SR:
 280                  * fc_lpf = SR * (1 + rolloff) / 2 + 5
 281                  * NOTE: The result should be round up.
 282                  */
 283                 if (symbol_rate <= 4500)
 284                         fc_lpf = 5;
 285                 else if (symbol_rate <= 10000)
 286                         fc_lpf = (u8)((symbol_rate * 11 + (10000-1)) / 10000);
 287                 else
 288                         fc_lpf = (u8)((symbol_rate * 3 + (5000-1)) / 5000 + 5);
 289                 /* 5 <= fc_lpf <= 36 is valid */
 290                 if (fc_lpf > 36)
 291                         fc_lpf = 36;
 292         } else {
 293                 dev_err(&priv->i2c->dev,
 294                         "horus3a: invalid delivery system %d\n",
 295                         p->delivery_system);
 296                 return -EINVAL;
 297         }
 298         /* 0x00 - 0x04 */
 299         data[0] = (u8)((ms >> 7) & 0xFF);
 300         data[1] = (u8)((ms << 1) & 0xFF);
 301         data[2] = 0x00;
 302         data[3] = 0x00;
 303         data[4] = (u8)(mdiv << 7);
 304         horus3a_write_regs(priv, 0x00, data, sizeof(data));
 305         /* Write G_CTL, F_CTL */
 306         horus3a_write_reg(priv, 0x09, (u8)((g_ctl << 5) | f_ctl));
 307         /* Write LPF cutoff frequency */
 308         horus3a_write_reg(priv, 0x37, (u8)(0x80 | (fc_lpf << 1)));
 309         /* Start Calibration */
 310         horus3a_write_reg(priv, 0x05, 0x80);
 311         /* IQ Generator enable */
 312         horus3a_write_reg(priv, 0x2a, 0x7b);
 313         /* tuner stabilization time */
 314         msleep(60);
 315         /* Store tuned frequency to the struct */
 316         priv->frequency = ms * 2 * 1000 / mixdiv;
 317         return 0;
 318 }
 319
 320 static int horus3a_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 321 {
 322         struct horus3a_priv *priv = fe->tuner_priv;
 323
 324         *frequency = priv->frequency;
 325         return 0;
 326 }
 327
 328 static const struct dvb_tuner_ops horus3a_tuner_ops = {
 329         .info = {
 330                 .name = "Sony Horus3a",
 331                 .frequency_min = 950000,
 332                 .frequency_max = 2150000,
 333                 .frequency_step = 1000,
 334         },
 335         .init = horus3a_init,
 336         .release = horus3a_release,
 337         .sleep = horus3a_sleep,
 338         .set_params = horus3a_set_params,
 339         .get_frequency = horus3a_get_frequency,
 340 };
 341
 342 struct dvb_frontend *horus3a_attach(struct dvb_frontend *fe,
 343                                     const struct horus3a_config *config,
 344                                     struct i2c_adapter *i2c)
 345 {
 346         u8 buf[3], val;
 347         struct horus3a_priv *priv = NULL;
 348
 349         priv = kzalloc(sizeof(struct horus3a_priv), GFP_KERNEL);
 350         if (priv == NULL)
 351                 return NULL;
 352         priv->i2c_address = (config->i2c_address >> 1);
 353         priv->i2c = i2c;
 354         priv->set_tuner_data = config->set_tuner_priv;
 355         priv->set_tuner = config->set_tuner_callback;
 356
 357         if (fe->ops.i2c_gate_ctrl)
 358                 fe->ops.i2c_gate_ctrl(fe, 1);
 359
 360         /* wait 4ms after power on */
 361         usleep_range(4000, 6000);
 362         /* IQ Generator disable */
 363         horus3a_write_reg(priv, 0x2a, 0x79);
 364         /* REF_R = Xtal Frequency */
 365         buf[0] = config->xtal_freq_mhz;
 366         buf[1] = config->xtal_freq_mhz;
 367         buf[2] = 0;
 368         /* 0x6 - 0x8 */
 369         horus3a_write_regs(priv, 0x6, buf, 3);
 370         /* IQ Out = Single Ended */
 371         horus3a_write_reg(priv, 0x0a, 0x40);
 372         switch (config->xtal_freq_mhz) {
 373         case 27:
 374                 val = 0x1f;
 375                 break;
 376         case 24:
 377                 val = 0x10;
 378                 break;
 379         case 16:
 380                 val = 0xc;
 381                 break;
 382         default:
 383                 val = 0;
 384                 dev_warn(&priv->i2c->dev,
 385                         "horus3a: invalid xtal frequency %dMHz\n",
 386                         config->xtal_freq_mhz);
 387                 break;
 388         }
 389         val <<= 2;
 390         horus3a_write_reg(priv, 0x0e, val);
 391         horus3a_enter_power_save(priv);
 392         usleep_range(3000, 5000);
 393
 394         if (fe->ops.i2c_gate_ctrl)
 395                 fe->ops.i2c_gate_ctrl(fe, 0);
 396
 397         memcpy(&fe->ops.tuner_ops, &horus3a_tuner_ops,
 398                                 sizeof(struct dvb_tuner_ops));
 399         fe->tuner_priv = priv;
 400         dev_info(&priv->i2c->dev,
 401                 "Sony HORUS3A attached on addr=%x at I2C adapter %p\n",
 402                 priv->i2c_address, priv->i2c);
 403         return fe;
 404 }
 405 EXPORT_SYMBOL(horus3a_attach);
 406
 407 MODULE_DESCRIPTION("Sony HORUS3A sattelite tuner driver");
 408 MODULE_AUTHOR("Sergey Kozlov <serjk@netup.ru>");
 409 MODULE_LICENSE("GPL");