drivers/media/dvb-frontends/horus3a.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * horus3a.h
   4  *
   5  * Sony Horus3A DVB-S/S2 tuner driver
   6  *
   7  * Copyright 2012 Sony Corporation
   8  * Copyright (C) 2014 NetUP Inc.
   9  * Copyright (C) 2014 Sergey Kozlov <serjk@netup.ru>
  10  * Copyright (C) 2014 Abylay Ospan <aospan@netup.ru>
  11  */
  12
  13 #include <linux/slab.h>
  14 #include <linux/module.h>
  15 #include <linux/dvb/frontend.h>
  16 #include <linux/types.h>
  17 #include "horus3a.h"
  18 #include <media/dvb_frontend.h>
  19
  20 #define MAX_WRITE_REGSIZE      5
  21
  22 enum horus3a_state {
  23         STATE_UNKNOWN,
  24         STATE_SLEEP,
  25         STATE_ACTIVE
  26 };
  27
  28 struct horus3a_priv {
  29         u32                     frequency;
  30         u8                      i2c_address;
  31         struct i2c_adapter      *i2c;
  32         enum horus3a_state      state;
  33         void                    *set_tuner_data;
  34         int                     (*set_tuner)(void *, int);
  35 };
  36
  37 static void horus3a_i2c_debug(struct horus3a_priv *priv,
  38                               u8 reg, u8 write, const u8 *data, u32 len)
  39 {
  40         dev_dbg(&priv->i2c->dev, "horus3a: I2C %s reg 0x%02x size %d\n",
  41                 (write == 0 ? "read" : "write"), reg, len);
  42         print_hex_dump_bytes("horus3a: I2C data: ",
  43                 DUMP_PREFIX_OFFSET, data, len);
  44 }
  45
  46 static int horus3a_write_regs(struct horus3a_priv *priv,
  47                               u8 reg, const u8 *data, u32 len)
  48 {
  49         int ret;
  50         u8 buf[MAX_WRITE_REGSIZE + 1];
  51         struct i2c_msg msg[1] = {
  52                 {
  53                         .addr = priv->i2c_address,
  54                         .flags = 0,
  55                         .len = len + 1,
  56                         .buf = buf,
  57                 }
  58         };
  59
  60         if (len + 1 > sizeof(buf)) {
  61                 dev_warn(&priv->i2c->dev,"wr reg=%04x: len=%d is too big!\n",
  62                          reg, len + 1);
  63                 return -E2BIG;
  64         }
  65
  66         horus3a_i2c_debug(priv, reg, 1, data, len);
  67         buf[0] = reg;
  68         memcpy(&buf[1], data, len);
  69         ret = i2c_transfer(priv->i2c, msg, 1);
  70         if (ret >= 0 && ret != 1)
  71                 ret = -EREMOTEIO;
  72         if (ret < 0) {
  73                 dev_warn(&priv->i2c->dev,
  74                         "%s: i2c wr failed=%d reg=%02x len=%d\n",
  75                         KBUILD_MODNAME, ret, reg, len);
  76                 return ret;
  77         }
  78         return 0;
  79 }
  80
  81 static int horus3a_write_reg(struct horus3a_priv *priv, u8 reg, u8 val)
  82 {
  83         u8 tmp = val; /* see gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 */
  84
  85         return horus3a_write_regs(priv, reg, &tmp, 1);
  86 }
  87
  88 static int horus3a_enter_power_save(struct horus3a_priv *priv)
  89 {
  90         u8 data[2];
  91
  92         dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
  93         if (priv->state == STATE_SLEEP)
  94                 return 0;
  95         /* IQ Generator disable */
  96         horus3a_write_reg(priv, 0x2a, 0x79);
  97         /* MDIV_EN = 0 */
  98         horus3a_write_reg(priv, 0x29, 0x70);
  99         /* VCO disable preparation */
 100         horus3a_write_reg(priv, 0x28, 0x3e);
 101         /* VCO buffer disable */
 102         horus3a_write_reg(priv, 0x2a, 0x19);
 103         /* VCO calibration disable */
 104         horus3a_write_reg(priv, 0x1c, 0x00);
 105         /* Power save setting (xtal is not stopped) */
 106         data[0] = 0xC0;
 107         /* LNA is Disabled */
 108         data[1] = 0xA7;
 109         /* 0x11 - 0x12 */
 110         horus3a_write_regs(priv, 0x11, data, sizeof(data));
 111         priv->state = STATE_SLEEP;
 112         return 0;
 113 }
 114
 115 static int horus3a_leave_power_save(struct horus3a_priv *priv)
 116 {
 117         u8 data[2];
 118
 119         dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
 120         if (priv->state == STATE_ACTIVE)
 121                 return 0;
 122         /* Leave power save */
 123         data[0] = 0x00;
 124         /* LNA is Disabled */
 125         data[1] = 0xa7;
 126         /* 0x11 - 0x12 */
 127         horus3a_write_regs(priv, 0x11, data, sizeof(data));
 128         /* VCO buffer enable */
 129         horus3a_write_reg(priv, 0x2a, 0x79);
 130         /* VCO calibration enable */
 131         horus3a_write_reg(priv, 0x1c, 0xc0);
 132         /* MDIV_EN = 1 */
 133         horus3a_write_reg(priv, 0x29, 0x71);
 134         usleep_range(5000, 7000);
 135         priv->state = STATE_ACTIVE;
 136         return 0;
 137 }
 138
 139 static int horus3a_init(struct dvb_frontend *fe)
 140 {
 141         struct horus3a_priv *priv = fe->tuner_priv;
 142
 143         dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
 144         return 0;
 145 }
 146
 147 static void horus3a_release(struct dvb_frontend *fe)
 148 {
 149         struct horus3a_priv *priv = fe->tuner_priv;
 150
 151         dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
 152         kfree(fe->tuner_priv);
 153         fe->tuner_priv = NULL;
 154 }
 155
 156 static int horus3a_sleep(struct dvb_frontend *fe)
 157 {
 158         struct horus3a_priv *priv = fe->tuner_priv;
 159
 160         dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
 161         horus3a_enter_power_save(priv);
 162         return 0;
 163 }
 164
 165 static int horus3a_set_params(struct dvb_frontend *fe)
 166 {
 167         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 168         struct horus3a_priv *priv = fe->tuner_priv;
 169         u32 frequency = p->frequency;
 170         u32 symbol_rate = p->symbol_rate/1000;
 171         u8 mixdiv = 0;
 172         u8 mdiv = 0;
 173         u32 ms = 0;
 174         u8 f_ctl = 0;
 175         u8 g_ctl = 0;
 176         u8 fc_lpf = 0;
 177         u8 data[5];
 178
 179         dev_dbg(&priv->i2c->dev, "%s(): frequency %dkHz symbol_rate %dksps\n",
 180                 __func__, frequency, symbol_rate);
 181         if (priv->set_tuner)
 182                 priv->set_tuner(priv->set_tuner_data, 0);
 183         if (priv->state == STATE_SLEEP)
 184                 horus3a_leave_power_save(priv);
 185
 186         /* frequency should be X MHz (X : integer) */
 187         frequency = DIV_ROUND_CLOSEST(frequency, 1000) * 1000;
 188         if (frequency <= 1155000) {
 189                 mixdiv = 4;
 190                 mdiv = 1;
 191         } else {
 192                 mixdiv = 2;
 193                 mdiv = 0;
 194         }
 195         /* Assumed that fREF == 1MHz (1000kHz) */
 196         ms = DIV_ROUND_CLOSEST((frequency * mixdiv) / 2, 1000);
 197         if (ms > 0x7FFF) { /* 15 bit */
 198                 dev_err(&priv->i2c->dev, "horus3a: invalid frequency %d\n",
 199                         frequency);
 200                 return -EINVAL;
 201         }
 202         if (frequency < 975000) {
 203                 /* F_CTL=11100 G_CTL=001 */
 204                 f_ctl = 0x1C;
 205                 g_ctl = 0x01;
 206         } else if (frequency < 1050000) {
 207                 /* F_CTL=11000 G_CTL=010 */
 208                 f_ctl = 0x18;
 209                 g_ctl = 0x02;
 210         } else if (frequency < 1150000) {
 211                 /* F_CTL=10100 G_CTL=010 */
 212                 f_ctl = 0x14;
 213                 g_ctl = 0x02;
 214         } else if (frequency < 1250000) {
 215                 /* F_CTL=10000 G_CTL=011 */
 216                 f_ctl = 0x10;
 217                 g_ctl = 0x03;
 218         } else if (frequency < 1350000) {
 219                 /* F_CTL=01100 G_CTL=100 */
 220                 f_ctl = 0x0C;
 221                 g_ctl = 0x04;
 222         } else if (frequency < 1450000) {
 223                 /* F_CTL=01010 G_CTL=100 */
 224                 f_ctl = 0x0A;
 225                 g_ctl = 0x04;
 226         } else if (frequency < 1600000) {
 227                 /* F_CTL=00111 G_CTL=101 */
 228                 f_ctl = 0x07;
 229                 g_ctl = 0x05;
 230         } else if (frequency < 1800000) {
 231                 /* F_CTL=00100 G_CTL=010 */
 232                 f_ctl = 0x04;
 233                 g_ctl = 0x02;
 234         } else if (frequency < 2000000) {
 235                 /* F_CTL=00010 G_CTL=001 */
 236                 f_ctl = 0x02;
 237                 g_ctl = 0x01;
 238         } else {
 239                 /* F_CTL=00000 G_CTL=000 */
 240                 f_ctl = 0x00;
 241                 g_ctl = 0x00;
 242         }
 243         /* LPF cutoff frequency setting */
 244         if (p->delivery_system == SYS_DVBS) {
 245                 /*
 246                  * rolloff = 0.35
 247                  * SR <= 4.3
 248                  * fc_lpf = 5
 249                  * 4.3 < SR <= 10
 250                  * fc_lpf = SR * (1 + rolloff) / 2 + SR / 2 =
 251                  *      SR * 1.175 = SR * (47/40)
 252                  * 10 < SR
 253                  * fc_lpf = SR * (1 + rolloff) / 2 + 5 =
 254                  *      SR * 0.675 + 5 = SR * (27/40) + 5
 255                  * NOTE: The result should be round up.
 256                  */
 257                 if (symbol_rate <= 4300)
 258                         fc_lpf = 5;
 259                 else if (symbol_rate <= 10000)
 260                         fc_lpf = (u8)DIV_ROUND_UP(symbol_rate * 47, 40000);
 261                 else
 262                         fc_lpf = (u8)DIV_ROUND_UP(symbol_rate * 27, 40000) + 5;
 263                 /* 5 <= fc_lpf <= 36 */
 264                 if (fc_lpf > 36)
 265                         fc_lpf = 36;
 266         } else if (p->delivery_system == SYS_DVBS2) {
 267                 /*
 268                  * SR <= 4.5:
 269                  * fc_lpf = 5
 270                  * 4.5 < SR <= 10:
 271                  * fc_lpf = SR * (1 + rolloff) / 2 + SR / 2
 272                  * 10 < SR:
 273                  * fc_lpf = SR * (1 + rolloff) / 2 + 5
 274                  * NOTE: The result should be round up.
 275                  */
 276                 if (symbol_rate <= 4500)
 277                         fc_lpf = 5;
 278                 else if (symbol_rate <= 10000)
 279                         fc_lpf = (u8)((symbol_rate * 11 + (10000-1)) / 10000);
 280                 else
 281                         fc_lpf = (u8)((symbol_rate * 3 + (5000-1)) / 5000 + 5);
 282                 /* 5 <= fc_lpf <= 36 is valid */
 283                 if (fc_lpf > 36)
 284                         fc_lpf = 36;
 285         } else {
 286                 dev_err(&priv->i2c->dev,
 287                         "horus3a: invalid delivery system %d\n",
 288                         p->delivery_system);
 289                 return -EINVAL;
 290         }
 291         /* 0x00 - 0x04 */
 292         data[0] = (u8)((ms >> 7) & 0xFF);
 293         data[1] = (u8)((ms << 1) & 0xFF);
 294         data[2] = 0x00;
 295         data[3] = 0x00;
 296         data[4] = (u8)(mdiv << 7);
 297         horus3a_write_regs(priv, 0x00, data, sizeof(data));
 298         /* Write G_CTL, F_CTL */
 299         horus3a_write_reg(priv, 0x09, (u8)((g_ctl << 5) | f_ctl));
 300         /* Write LPF cutoff frequency */
 301         horus3a_write_reg(priv, 0x37, (u8)(0x80 | (fc_lpf << 1)));
 302         /* Start Calibration */
 303         horus3a_write_reg(priv, 0x05, 0x80);
 304         /* IQ Generator enable */
 305         horus3a_write_reg(priv, 0x2a, 0x7b);
 306         /* tuner stabilization time */
 307         msleep(60);
 308         /* Store tuned frequency to the struct */
 309         priv->frequency = ms * 2 * 1000 / mixdiv;
 310         return 0;
 311 }
 312
 313 static int horus3a_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 314 {
 315         struct horus3a_priv *priv = fe->tuner_priv;
 316
 317         *frequency = priv->frequency;
 318         return 0;
 319 }
 320
 321 static const struct dvb_tuner_ops horus3a_tuner_ops = {
 322         .info = {
 323                 .name = "Sony Horus3a",
 324                 .frequency_min_hz  =  950 * MHz,
 325                 .frequency_max_hz  = 2150 * MHz,
 326                 .frequency_step_hz =    1 * MHz,
 327         },
 328         .init = horus3a_init,
 329         .release = horus3a_release,
 330         .sleep = horus3a_sleep,
 331         .set_params = horus3a_set_params,
 332         .get_frequency = horus3a_get_frequency,
 333 };
 334
 335 struct dvb_frontend *horus3a_attach(struct dvb_frontend *fe,
 336                                     const struct horus3a_config *config,
 337                                     struct i2c_adapter *i2c)
 338 {
 339         u8 buf[3], val;
 340         struct horus3a_priv *priv = NULL;
 341
 342         priv = kzalloc(sizeof(struct horus3a_priv), GFP_KERNEL);
 343         if (priv == NULL)
 344                 return NULL;
 345         priv->i2c_address = (config->i2c_address >> 1);
 346         priv->i2c = i2c;
 347         priv->set_tuner_data = config->set_tuner_priv;
 348         priv->set_tuner = config->set_tuner_callback;
 349
 350         if (fe->ops.i2c_gate_ctrl)
 351                 fe->ops.i2c_gate_ctrl(fe, 1);
 352
 353         /* wait 4ms after power on */
 354         usleep_range(4000, 6000);
 355         /* IQ Generator disable */
 356         horus3a_write_reg(priv, 0x2a, 0x79);
 357         /* REF_R = Xtal Frequency */
 358         buf[0] = config->xtal_freq_mhz;
 359         buf[1] = config->xtal_freq_mhz;
 360         buf[2] = 0;
 361         /* 0x6 - 0x8 */
 362         horus3a_write_regs(priv, 0x6, buf, 3);
 363         /* IQ Out = Single Ended */
 364         horus3a_write_reg(priv, 0x0a, 0x40);
 365         switch (config->xtal_freq_mhz) {
 366         case 27:
 367                 val = 0x1f;
 368                 break;
 369         case 24:
 370                 val = 0x10;
 371                 break;
 372         case 16:
 373                 val = 0xc;
 374                 break;
 375         default:
 376                 val = 0;
 377                 dev_warn(&priv->i2c->dev,
 378                         "horus3a: invalid xtal frequency %dMHz\n",
 379                         config->xtal_freq_mhz);
 380                 break;
 381         }
 382         val <<= 2;
 383         horus3a_write_reg(priv, 0x0e, val);
 384         horus3a_enter_power_save(priv);
 385         usleep_range(3000, 5000);
 386
 387         if (fe->ops.i2c_gate_ctrl)
 388                 fe->ops.i2c_gate_ctrl(fe, 0);
 389
 390         memcpy(&fe->ops.tuner_ops, &horus3a_tuner_ops,
 391                                 sizeof(struct dvb_tuner_ops));
 392         fe->tuner_priv = priv;
 393         dev_info(&priv->i2c->dev,
 394                 "Sony HORUS3A attached on addr=%x at I2C adapter %p\n",
 395                 priv->i2c_address, priv->i2c);
 396         return fe;
 397 }
 398 EXPORT_SYMBOL(horus3a_attach);
 399
 400 MODULE_DESCRIPTION("Sony HORUS3A satellite tuner driver");
 401 MODULE_AUTHOR("Sergey Kozlov <serjk@netup.ru>");
 402 MODULE_LICENSE("GPL");