drivers/media/dvb/frontends/stv6110x.c

   1 /*
   2         STV6110(A) Silicon tuner driver
   3
   4         Copyright (C) Manu Abraham <abraham.manu@gmail.com>
   5
   6         Copyright (C) ST Microelectronics
   7
   8         This program is free software; you can redistribute it and/or modify
   9         it under the terms of the GNU General Public License as published by
  10         the Free Software Foundation; either version 2 of the License, or
  11         (at your option) any later version.
  12
  13         This program is distributed in the hope that it will be useful,
  14         but WITHOUT ANY WARRANTY; without even the implied warranty of
  15         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16         GNU General Public License for more details.
  17
  18         You should have received a copy of the GNU General Public License
  19         along with this program; if not, write to the Free Software
  20         Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include <linux/init.h>
  24 #include <linux/kernel.h>
  25 #include <linux/module.h>
  26 #include <linux/string.h>
  27
  28 #include "dvb_frontend.h"
  29
  30 #include "stv6110x_reg.h"
  31 #include "stv6110x.h"
  32 #include "stv6110x_priv.h"
  33
  34 static unsigned int verbose;
  35 module_param(verbose, int, 0644);
  36 MODULE_PARM_DESC(verbose, "Set Verbosity level");
  37
  38 static u8 stv6110x_regs[] = {0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e};
  39
  40 static int stv6110x_read_reg(struct stv6110x_state *stv6110x, u8 reg, u8 *data)
  41 {
  42         int ret;
  43         const struct stv6110x_config *config = stv6110x->config;
  44         u8 b0[] = { reg };
  45         u8 b1[] = { 0 };
  46         struct i2c_msg msg[] = {
  47                 { .addr = config->addr, .flags = 0,        .buf = b0, .len = 1 },
  48                 { .addr = config->addr, .flags = I2C_M_RD, .buf = b1, .len = 1 }
  49         };
  50
  51         ret = i2c_transfer(stv6110x->i2c, msg, 2);
  52         if (ret != 2) {
  53                 dprintk(FE_ERROR, 1, "I/O Error");
  54                 return -EREMOTEIO;
  55         }
  56         *data = b1[0];
  57
  58         return 0;
  59 }
  60
  61 static int stv6110x_write_reg(struct stv6110x_state *stv6110x, u8 reg, u8 data)
  62 {
  63         int ret;
  64         const struct stv6110x_config *config = stv6110x->config;
  65         u8 buf[] = { reg, data };
  66         struct i2c_msg msg = { .addr = config->addr, .flags = 0, . buf = buf, .len = 2 };
  67
  68         ret = i2c_transfer(stv6110x->i2c, &msg, 1);
  69         if (ret != 1) {
  70                 dprintk(FE_ERROR, 1, "I/O Error");
  71                 return -EREMOTEIO;
  72         }
  73
  74         return 0;
  75 }
  76
  77 static int stv6110x_init(struct dvb_frontend *fe)
  78 {
  79         struct stv6110x_state *stv6110x = fe->tuner_priv;
  80         int ret;
  81         u8 i;
  82
  83         for (i = 0; i < ARRAY_SIZE(stv6110x_regs); i++) {
  84                 ret = stv6110x_write_reg(stv6110x, i, stv6110x_regs[i]);
  85                 if (ret < 0) {
  86                         dprintk(FE_ERROR, 1, "Initialization failed");
  87                         return -1;
  88                 }
  89         }
  90
  91         return 0;
  92 }
  93
  94 static int stv6110x_set_frequency(struct dvb_frontend *fe, u32 frequency)
  95 {
  96         struct stv6110x_state *stv6110x = fe->tuner_priv;
  97         u32 rDiv, divider;
  98         s32 pVal, pCalc, rDivOpt = 0;
  99         u8 i;
 100
 101         STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL1], CTRL1_K, (REFCLOCK_MHz - 16));
 102
 103         if (frequency <= 1023000) {
 104                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_DIV4SEL, 1);
 105                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_PRESC32_ON, 0);
 106                 pVal = 40;
 107         } else if (frequency <= 1300000) {
 108                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_DIV4SEL, 1);
 109                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_PRESC32_ON, 1);
 110                 pVal = 40;
 111         } else if (frequency <= 2046000) {
 112                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_DIV4SEL, 0);
 113                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_PRESC32_ON, 0);
 114                 pVal = 20;
 115         } else {
 116                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_DIV4SEL, 0);
 117                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_PRESC32_ON, 1);
 118                 pVal = 20;
 119         }
 120
 121         for (rDiv = 0; rDiv <= 3; rDiv++) {
 122                 pCalc = (REFCLOCK_kHz / 100) / R_DIV(rDiv);
 123
 124                 if ((abs((s32)(pCalc - pVal))) < (abs((s32)(1000 - pVal))))
 125                         rDivOpt = rDiv;
 126         }
 127
 128         divider = (frequency * R_DIV(rDivOpt) * pVal) / REFCLOCK_kHz;
 129         divider = (divider + 5) / 10;
 130
 131         STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_R_DIV, rDivOpt);
 132         STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_N_DIV_11_8, MSB(divider));
 133         STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG0], TNG0_N_DIV_7_0, LSB(divider));
 134
 135         /* VCO Auto calibration */
 136         STV6110x_SETFIELD(stv6110x_regs[STV6110x_STAT1], STAT1_CALVCO_STRT, 1);
 137
 138         stv6110x_write_reg(stv6110x, STV6110x_CTRL1, stv6110x_regs[STV6110x_CTRL1]);
 139         stv6110x_write_reg(stv6110x, STV6110x_TNG1, stv6110x_regs[STV6110x_TNG1]);
 140         stv6110x_write_reg(stv6110x, STV6110x_TNG0, stv6110x_regs[STV6110x_TNG0]);
 141         stv6110x_write_reg(stv6110x, STV6110x_STAT1, stv6110x_regs[STV6110x_STAT1]);
 142
 143         for (i = 0; i < TRIALS; i++) {
 144                 stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x_regs[STV6110x_STAT1]);
 145                 if (!STV6110x_GETFIELD(STAT1_CALVCO_STRT, stv6110x_regs[STV6110x_STAT1]))
 146                                 break;
 147                 msleep(1);
 148         }
 149
 150         return 0;
 151 }
 152
 153 static int stv6110x_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 154 {
 155         struct stv6110x_state *stv6110x = fe->tuner_priv;
 156
 157         stv6110x_read_reg(stv6110x, STV6110x_TNG1, &stv6110x_regs[STV6110x_TNG1]);
 158         stv6110x_read_reg(stv6110x, STV6110x_TNG0, &stv6110x_regs[STV6110x_TNG0]);
 159
 160         *frequency = (MAKEWORD16(STV6110x_GETFIELD(TNG1_N_DIV_11_8, stv6110x_regs[STV6110x_TNG1]),
 161                                  STV6110x_GETFIELD(TNG0_N_DIV_7_0, stv6110x_regs[STV6110x_TNG0]))) * REFCLOCK_kHz;
 162
 163         *frequency /= (1 << (STV6110x_GETFIELD(TNG1_R_DIV, stv6110x_regs[STV6110x_TNG1]) +
 164                              STV6110x_GETFIELD(TNG1_DIV4SEL, stv6110x_regs[STV6110x_TNG1])));
 165
 166         *frequency >>= 2;
 167
 168         return 0;
 169 }
 170
 171 static int stv6110x_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
 172 {
 173         struct stv6110x_state *stv6110x = fe->tuner_priv;
 174         u32 halfbw;
 175         u8 i;
 176
 177         halfbw = bandwidth >> 1;
 178
 179         if (halfbw > 36000000)
 180                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL3], CTRL3_CF, 31); /* LPF */
 181         else if (halfbw < 5000000)
 182                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL3], CTRL3_CF, 0); /* LPF */
 183         else
 184                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL3], CTRL3_CF, ((halfbw / 1000000) - 5)); /* LPF */
 185
 186
 187         STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL3], CTRL3_RCCLK_OFF, 0x0); /* cal. clk activated */
 188         STV6110x_SETFIELD(stv6110x_regs[STV6110x_STAT1], STAT1_CALRC_STRT, 0x1); /* LPF auto cal */
 189
 190         stv6110x_write_reg(stv6110x, STV6110x_CTRL3, stv6110x_regs[STV6110x_CTRL3]);
 191         stv6110x_write_reg(stv6110x, STV6110x_STAT1, stv6110x_regs[STV6110x_STAT1]);
 192
 193         for (i = 0; i < TRIALS; i++) {
 194                 stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x_regs[STV6110x_STAT1]);
 195                 if (!STV6110x_GETFIELD(STAT1_CALRC_STRT, stv6110x_regs[STV6110x_STAT1]))
 196                         break;
 197                 msleep(1);
 198         }
 199         STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL3], CTRL3_RCCLK_OFF, 0x1); /* cal. done */
 200         stv6110x_write_reg(stv6110x, STV6110x_CTRL3, stv6110x_regs[STV6110x_CTRL3]);
 201
 202         return 0;
 203 }
 204
 205 static int stv6110x_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
 206 {
 207         struct stv6110x_state *stv6110x = fe->tuner_priv;
 208
 209         stv6110x_read_reg(stv6110x, STV6110x_CTRL3, &stv6110x_regs[STV6110x_CTRL3]);
 210         *bandwidth = (STV6110x_GETFIELD(CTRL3_CF, stv6110x_regs[STV6110x_CTRL3]) + 5) * 2000000;
 211
 212         return 0;
 213 }
 214
 215 static int stv6110x_set_refclock(struct dvb_frontend *fe, u32 refclock)
 216 {
 217         struct stv6110x_state *stv6110x = fe->tuner_priv;
 218
 219         /* setup divider */
 220         switch (refclock) {
 221         default:
 222         case 1:
 223                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL2], CTRL2_CO_DIV, 0);
 224                 break;
 225         case 2:
 226                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL2], CTRL2_CO_DIV, 1);
 227                 break;
 228         case 4:
 229                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL2], CTRL2_CO_DIV, 2);
 230                 break;
 231         case 8:
 232         case 0:
 233                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL2], CTRL2_CO_DIV, 3);
 234                 break;
 235         }
 236         stv6110x_write_reg(stv6110x, STV6110x_CTRL2, stv6110x_regs[STV6110x_CTRL2]);
 237
 238         return 0;
 239 }
 240
 241 static int stv6110x_get_bbgain(struct dvb_frontend *fe, u32 *gain)
 242 {
 243         struct stv6110x_state *stv6110x = fe->tuner_priv;
 244
 245         stv6110x_read_reg(stv6110x, STV6110x_CTRL2, &stv6110x_regs[STV6110x_CTRL2]);
 246         *gain = 2 * STV6110x_GETFIELD(CTRL2_BBGAIN, stv6110x_regs[STV6110x_CTRL2]);
 247
 248         return 0;
 249 }
 250
 251 static int stv6110x_set_bbgain(struct dvb_frontend *fe, u32 gain)
 252 {
 253         struct stv6110x_state *stv6110x = fe->tuner_priv;
 254
 255         STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL2], CTRL2_BBGAIN, gain / 2);
 256         stv6110x_write_reg(stv6110x, STV6110x_CTRL2, stv6110x_regs[STV6110x_CTRL2]);
 257
 258         return 0;
 259 }
 260
 261 static int stv6110x_set_mode(struct dvb_frontend *fe, enum tuner_mode mode)
 262 {
 263         struct stv6110x_state *stv6110x = fe->tuner_priv;
 264         int ret;
 265
 266         switch (mode) {
 267         case TUNER_SLEEP:
 268                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL1], CTRL1_SYN, 0);
 269                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL1], CTRL1_RX, 0);
 270                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL1], CTRL1_LPT, 0);
 271                 break;
 272
 273         case TUNER_WAKE:
 274                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL1], CTRL1_SYN, 1);
 275                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL1], CTRL1_RX, 1);
 276                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL1], CTRL1_LPT, 1);
 277                 break;
 278         }
 279
 280         ret = stv6110x_write_reg(stv6110x, STV6110x_CTRL1, stv6110x_regs[STV6110x_CTRL1]);
 281         if (ret < 0) {
 282                 dprintk(FE_ERROR, 1, "I/O Error");
 283                 return -EIO;
 284         }
 285
 286         return 0;
 287 }
 288
 289 static int stv6110x_sleep(struct dvb_frontend *fe)
 290 {
 291         return stv6110x_set_mode(fe, TUNER_SLEEP);
 292 }
 293
 294 static int stv6110x_get_status(struct dvb_frontend *fe, u32 *status)
 295 {
 296         struct stv6110x_state *stv6110x = fe->tuner_priv;
 297
 298         stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x_regs[STV6110x_STAT1]);
 299
 300         if (STV6110x_GETFIELD(STAT1_LOCK, stv6110x_regs[STV6110x_STAT1]))
 301                 *status = TUNER_PHASELOCKED;
 302         else
 303                 *status = 0;
 304
 305         return 0;
 306 }
 307
 308
 309 static int stv6110x_release(struct dvb_frontend *fe)
 310 {
 311         struct stv6110x_state *stv6110x = fe->tuner_priv;
 312
 313         fe->tuner_priv = NULL;
 314         kfree(stv6110x);
 315
 316         return 0;
 317 }
 318
 319 static struct dvb_tuner_ops stv6110x_ops = {
 320         .info = {
 321                 .name           = "STV6110(A) Silicon Tuner",
 322                 .frequency_min  =  950000,
 323                 .frequency_max  = 2150000,
 324                 .frequency_step = 0,
 325         },
 326
 327         .init                   = stv6110x_init,
 328         .sleep                  = stv6110x_sleep,
 329         .release                = stv6110x_release
 330 };
 331
 332 static struct stv6110x_devctl stv6110x_ctl = {
 333         .tuner_init             = stv6110x_init,
 334         .tuner_set_mode         = stv6110x_set_mode,
 335         .tuner_set_frequency    = stv6110x_set_frequency,
 336         .tuner_get_frequency    = stv6110x_get_frequency,
 337         .tuner_set_bandwidth    = stv6110x_set_bandwidth,
 338         .tuner_get_bandwidth    = stv6110x_get_bandwidth,
 339         .tuner_set_bbgain       = stv6110x_set_bbgain,
 340         .tuner_get_bbgain       = stv6110x_get_bbgain,
 341         .tuner_set_refclk       = stv6110x_set_refclock,
 342         .tuner_get_status       = stv6110x_get_status,
 343 };
 344
 345 struct stv6110x_devctl *stv6110x_attach(struct dvb_frontend *fe,
 346                                         const struct stv6110x_config *config,
 347                                         struct i2c_adapter *i2c)
 348 {
 349         struct stv6110x_state *stv6110x;
 350
 351         stv6110x = kzalloc(sizeof (struct stv6110x_state), GFP_KERNEL);
 352         if (stv6110x == NULL)
 353                 goto error;
 354
 355         stv6110x->i2c           = i2c;
 356         stv6110x->config        = config;
 357         stv6110x->devctl        = &stv6110x_ctl;
 358
 359         fe->tuner_priv          = stv6110x;
 360         fe->ops.tuner_ops       = stv6110x_ops;
 361
 362         printk("%s: Attaching STV6110x \n", __func__);
 363         return stv6110x->devctl;
 364
 365 error:
 366         kfree(stv6110x);
 367         return NULL;
 368 }
 369 EXPORT_SYMBOL(stv6110x_attach);
 370
 371 MODULE_AUTHOR("Manu Abraham");
 372 MODULE_DESCRIPTION("STV6110x Silicon tuner");
 373 MODULE_LICENSE("GPL");