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
  57         return 0;
  58 }
  59
  60 static int stv6110x_write_reg(struct stv6110x_state *stv6110x, u8 reg, u8 data)
  61 {
  62         int ret;
  63         const struct stv6110x_config *config = stv6110x->config;
  64         u8 buf[] = { reg, data };
  65         struct i2c_msg msg = { .addr = config->addr, .flags = 0, . buf = buf, .len = 2 };
  66
  67         ret = i2c_transfer(stv6110x->i2c, &msg, 1);
  68         if (ret != 1) {
  69                 dprintk(FE_ERROR, 1, "I/O Error");
  70                 return -EREMOTEIO;
  71         }
  72
  73         return 0;
  74 }
  75
  76 static int stv6110x_init(struct dvb_frontend *fe)
  77 {
  78         struct stv6110x_state *stv6110x = fe->tuner_priv;
  79         int ret;
  80         u8 i;
  81
  82         for (i = 0; i < ARRAY_SIZE(stv6110x_regs); i++) {
  83                 ret = stv6110x_write_reg(stv6110x, i, stv6110x_regs[i]);
  84                 if (ret < 0) {
  85                         dprintk(FE_ERROR, 1, "Initialization failed");
  86                         return -1;
  87                 }
  88         }
  89
  90         return 0;
  91 }
  92
  93 static int stv6110x_set_frequency(struct dvb_frontend *fe, u32 frequency)
  94 {
  95         struct stv6110x_state *stv6110x = fe->tuner_priv;
  96         u32 rDiv, divider;
  97         s32 pVal, pCalc, rDivOpt = 0;
  98         u8 i;
  99
 100         STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL1], CTRL1_K, (REFCLOCK_MHz - 16));
 101
 102         if (frequency <= 1023000) {
 103                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_DIV4SEL, 1);
 104                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_PRESC32_ON, 0);
 105                 pVal = 40;
 106         } else if (frequency <= 1300000) {
 107                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_DIV4SEL, 1);
 108                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_PRESC32_ON, 1);
 109                 pVal = 40;
 110         } else if (frequency <= 2046000) {
 111                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_DIV4SEL, 0);
 112                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_PRESC32_ON, 0);
 113                 pVal = 20;
 114         } else {
 115                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_DIV4SEL, 0);
 116                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_PRESC32_ON, 1);
 117                 pVal = 20;
 118         }
 119
 120         for (rDiv = 0; rDiv <= 3; rDiv++) {
 121                 pCalc = (REFCLOCK_kHz / 100) / R_DIV(rDiv);
 122
 123                 if ((abs((s32)(pCalc - pVal))) < (abs((s32)(1000 - pVal))))
 124                         rDivOpt = rDiv;
 125         }
 126
 127         divider = (frequency * R_DIV(rDivOpt) * pVal) / REFCLOCK_kHz;
 128         divider = (divider + 5) / 10;
 129
 130         STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_R_DIV, rDivOpt);
 131         STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG1], TNG1_N_DIV_11_8, MSB(divider));
 132         STV6110x_SETFIELD(stv6110x_regs[STV6110x_TNG0], TNG0_N_DIV_7_0, LSB(divider));
 133
 134         /* VCO Auto calibration */
 135         STV6110x_SETFIELD(stv6110x_regs[STV6110x_STAT1], STAT1_CALVCO_STRT, 1);
 136
 137         stv6110x_write_reg(stv6110x, STV6110x_CTRL1, stv6110x_regs[STV6110x_CTRL1]);
 138         stv6110x_write_reg(stv6110x, STV6110x_TNG1, stv6110x_regs[STV6110x_TNG1]);
 139         stv6110x_write_reg(stv6110x, STV6110x_TNG0, stv6110x_regs[STV6110x_TNG0]);
 140         stv6110x_write_reg(stv6110x, STV6110x_STAT1, stv6110x_regs[STV6110x_STAT1]);
 141
 142         for (i = 0; i < TRIALS; i++) {
 143                 stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x_regs[STV6110x_STAT1]);
 144                 if (!STV6110x_GETFIELD(STAT1_CALVCO_STRT, stv6110x_regs[STV6110x_STAT1]))
 145                                 break;
 146                 msleep(1);
 147         }
 148
 149         return 0;
 150 }
 151
 152 static int stv6110x_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 153 {
 154         struct stv6110x_state *stv6110x = fe->tuner_priv;
 155
 156         stv6110x_read_reg(stv6110x, STV6110x_TNG1, &stv6110x_regs[STV6110x_TNG1]);
 157         stv6110x_read_reg(stv6110x, STV6110x_TNG0, &stv6110x_regs[STV6110x_TNG0]);
 158
 159         *frequency = (MAKEWORD16(STV6110x_GETFIELD(TNG1_N_DIV_11_8, stv6110x_regs[STV6110x_TNG1]),
 160                                  STV6110x_GETFIELD(TNG0_N_DIV_7_0, stv6110x_regs[STV6110x_TNG0]))) * REFCLOCK_kHz;
 161
 162         *frequency /= (1 << (STV6110x_GETFIELD(TNG1_R_DIV, stv6110x_regs[STV6110x_TNG1]) +
 163                              STV6110x_GETFIELD(TNG1_DIV4SEL, stv6110x_regs[STV6110x_TNG1])));
 164
 165         *frequency >>= 2;
 166
 167         return 0;
 168 }
 169
 170 static int stv6110x_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
 171 {
 172         struct stv6110x_state *stv6110x = fe->tuner_priv;
 173         u32 halfbw;
 174         u8 i;
 175
 176         halfbw = bandwidth >> 1;
 177
 178         if (halfbw > 36000000)
 179                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL3], CTRL3_CF, 31); /* LPF */
 180         else if (halfbw < 5000000)
 181                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL3], CTRL3_CF, 0); /* LPF */
 182         else
 183                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL3], CTRL3_CF, ((halfbw / 1000000) - 5)); /* LPF */
 184
 185
 186         STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL3], CTRL3_RCCLK_OFF, 0x0); /* cal. clk activated */
 187         STV6110x_SETFIELD(stv6110x_regs[STV6110x_STAT1], STAT1_CALRC_STRT, 0x1); /* LPF auto cal */
 188
 189         stv6110x_write_reg(stv6110x, STV6110x_CTRL3, stv6110x_regs[STV6110x_CTRL3]);
 190         stv6110x_write_reg(stv6110x, STV6110x_STAT1, stv6110x_regs[STV6110x_STAT1]);
 191
 192         for (i = 0; i < TRIALS; i++) {
 193                 stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x_regs[STV6110x_STAT1]);
 194                 if (!STV6110x_GETFIELD(STAT1_CALRC_STRT, stv6110x_regs[STV6110x_STAT1]))
 195                         break;
 196                 msleep(1);
 197         }
 198         STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL3], CTRL3_RCCLK_OFF, 0x1); /* cal. done */
 199         stv6110x_write_reg(stv6110x, STV6110x_CTRL3, stv6110x_regs[STV6110x_CTRL3]);
 200
 201         return 0;
 202 }
 203
 204 static int stv6110x_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
 205 {
 206         struct stv6110x_state *stv6110x = fe->tuner_priv;
 207
 208         stv6110x_read_reg(stv6110x, STV6110x_CTRL3, &stv6110x_regs[STV6110x_CTRL3]);
 209         *bandwidth = (STV6110x_GETFIELD(CTRL3_CF, stv6110x_regs[STV6110x_CTRL3]) + 5) * 2000000;
 210
 211         return 0;
 212 }
 213
 214 static int stv6110x_set_refclock(struct dvb_frontend *fe, u32 refclock)
 215 {
 216         struct stv6110x_state *stv6110x = fe->tuner_priv;
 217
 218         /* setup divider */
 219         switch (refclock) {
 220         default:
 221         case 1:
 222                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL2], CTRL2_CO_DIV, 0);
 223                 break;
 224         case 2:
 225                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL2], CTRL2_CO_DIV, 1);
 226                 break;
 227         case 4:
 228                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL2], CTRL2_CO_DIV, 2);
 229                 break;
 230         case 8:
 231         case 0:
 232                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL2], CTRL2_CO_DIV, 3);
 233                 break;
 234         }
 235         stv6110x_write_reg(stv6110x, STV6110x_CTRL2, stv6110x_regs[STV6110x_CTRL2]);
 236
 237         return 0;
 238 }
 239
 240 static int stv6110x_get_bbgain(struct dvb_frontend *fe, u32 *gain)
 241 {
 242         struct stv6110x_state *stv6110x = fe->tuner_priv;
 243
 244         stv6110x_read_reg(stv6110x, STV6110x_CTRL2, &stv6110x_regs[STV6110x_CTRL2]);
 245         *gain = 2 * STV6110x_GETFIELD(CTRL2_BBGAIN, stv6110x_regs[STV6110x_CTRL2]);
 246
 247         return 0;
 248 }
 249
 250 static int stv6110x_set_bbgain(struct dvb_frontend *fe, u32 gain)
 251 {
 252         struct stv6110x_state *stv6110x = fe->tuner_priv;
 253
 254         STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL2], CTRL2_BBGAIN, gain / 2);
 255         stv6110x_write_reg(stv6110x, STV6110x_CTRL2, stv6110x_regs[STV6110x_CTRL2]);
 256
 257         return 0;
 258 }
 259
 260 static int stv6110x_set_mode(struct dvb_frontend *fe, enum tuner_mode mode)
 261 {
 262         struct stv6110x_state *stv6110x = fe->tuner_priv;
 263         int ret;
 264
 265         switch (mode) {
 266         case TUNER_SLEEP:
 267                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL1], CTRL1_SYN, 0);
 268                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL1], CTRL1_RX, 0);
 269                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL1], CTRL1_LPT, 0);
 270                 break;
 271
 272         case TUNER_WAKE:
 273                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL1], CTRL1_SYN, 1);
 274                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL1], CTRL1_RX, 1);
 275                 STV6110x_SETFIELD(stv6110x_regs[STV6110x_CTRL1], CTRL1_LPT, 1);
 276                 break;
 277         }
 278
 279         ret = stv6110x_write_reg(stv6110x, STV6110x_CTRL1, stv6110x_regs[STV6110x_CTRL1]);
 280         if (ret < 0) {
 281                 dprintk(FE_ERROR, 1, "I/O Error");
 282                 return -EIO;
 283         }
 284
 285         return 0;
 286 }
 287
 288 static int stv6110x_sleep(struct dvb_frontend *fe)
 289 {
 290         return stv6110x_set_mode(fe, TUNER_SLEEP);
 291 }
 292
 293 static int stv6110x_get_status(struct dvb_frontend *fe, u32 *status)
 294 {
 295         struct stv6110x_state *stv6110x = fe->tuner_priv;
 296
 297         stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x_regs[STV6110x_STAT1]);
 298
 299         if (STV6110x_GETFIELD(STAT1_LOCK, stv6110x_regs[STV6110x_STAT1]))
 300                 *status = TUNER_PHASELOCKED;
 301         else
 302                 *status = 0;
 303
 304         return 0;
 305 }
 306
 307
 308 static int stv6110x_release(struct dvb_frontend *fe)
 309 {
 310         struct stv6110x_state *stv6110x = fe->tuner_priv;
 311
 312         fe->tuner_priv = NULL;
 313         kfree(stv6110x);
 314
 315         return 0;
 316 }
 317
 318 static struct dvb_tuner_ops stv6110x_ops = {
 319         .info = {
 320                 .name           = "STV6110(A) Silicon Tuner",
 321                 .frequency_min  =  950000,
 322                 .frequency_max  = 2150000,
 323                 .frequency_step = 0,
 324         },
 325
 326         .init                   = stv6110x_init,
 327         .sleep                  = stv6110x_sleep,
 328         .release                = stv6110x_release
 329 };
 330
 331 static struct stv6110x_devctl stv6110x_ctl = {
 332         .tuner_init             = stv6110x_init,
 333         .tuner_set_mode         = stv6110x_set_mode,
 334         .tuner_set_frequency    = stv6110x_set_frequency,
 335         .tuner_get_frequency    = stv6110x_get_frequency,
 336         .tuner_set_bandwidth    = stv6110x_set_bandwidth,
 337         .tuner_get_bandwidth    = stv6110x_get_bandwidth,
 338         .tuner_set_bbgain       = stv6110x_set_bbgain,
 339         .tuner_get_bbgain       = stv6110x_get_bbgain,
 340         .tuner_set_refclk       = stv6110x_set_refclock,
 341         .tuner_get_status       = stv6110x_get_status,
 342 };
 343
 344 struct stv6110x_devctl *stv6110x_attach(struct dvb_frontend *fe,
 345                                         const struct stv6110x_config *config,
 346                                         struct i2c_adapter *i2c)
 347 {
 348         struct stv6110x_state *stv6110x;
 349
 350         stv6110x = kzalloc(sizeof (struct stv6110x_state), GFP_KERNEL);
 351         if (stv6110x == NULL)
 352                 goto error;
 353
 354         stv6110x->i2c           = i2c;
 355         stv6110x->config        = config;
 356         stv6110x->devctl        = &stv6110x_ctl;
 357
 358         fe->tuner_priv          = stv6110x;
 359         fe->ops.tuner_ops       = stv6110x_ops;
 360
 361         printk("%s: Attaching STV6110x \n", __func__);
 362         return stv6110x->devctl;
 363
 364 error:
 365         kfree(stv6110x);
 366         return NULL;
 367 }
 368 EXPORT_SYMBOL(stv6110x_attach);
 369
 370 MODULE_AUTHOR("Manu Abraham");
 371 MODULE_DESCRIPTION("STV6110x Silicon tuner");
 372 MODULE_LICENSE("GPL");