kernel/drivers/media/dvb-frontends/stb6100.c

   1 /*
   2         STB6100 Silicon Tuner
   3         Copyright (C) Manu Abraham (abraham.manu@gmail.com)
   4
   5         Copyright (C) ST Microelectronics
   6
   7         This program is free software; you can redistribute it and/or modify
   8         it under the terms of the GNU General Public License as published by
   9         the Free Software Foundation; either version 2 of the License, or
  10         (at your option) any later version.
  11
  12         This program is distributed in the hope that it will be useful,
  13         but WITHOUT ANY WARRANTY; without even the implied warranty of
  14         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15         GNU General Public License for more details.
  16
  17         You should have received a copy of the GNU General Public License
  18         along with this program; if not, write to the Free Software
  19         Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include <linux/init.h>
  23 #include <linux/kernel.h>
  24 #include <linux/module.h>
  25 #include <linux/slab.h>
  26 #include <linux/string.h>
  27
  28 #include "dvb_frontend.h"
  29 #include "stb6100.h"
  30
  31 static unsigned int verbose;
  32 module_param(verbose, int, 0644);
  33
  34 /* Max transfer size done by I2C transfer functions */
  35 #define MAX_XFER_SIZE  64
  36
  37 #define FE_ERROR                0
  38 #define FE_NOTICE               1
  39 #define FE_INFO                 2
  40 #define FE_DEBUG                3
  41
  42 #define dprintk(x, y, z, format, arg...) do {                                           \
  43         if (z) {                                                                        \
  44                 if      ((x > FE_ERROR) && (x > y))                                     \
  45                         printk(KERN_ERR "%s: " format "\n", __func__ , ##arg);          \
  46                 else if ((x > FE_NOTICE) && (x > y))                                    \
  47                         printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg);       \
  48                 else if ((x > FE_INFO) && (x > y))                                      \
  49                         printk(KERN_INFO "%s: " format "\n", __func__ , ##arg);         \
  50                 else if ((x > FE_DEBUG) && (x > y))                                     \
  51                         printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg);        \
  52         } else {                                                                        \
  53                 if (x > y)                                                              \
  54                         printk(format, ##arg);                                          \
  55         }                                                                               \
  56 } while (0)
  57
  58 struct stb6100_lkup {
  59         u32 val_low;
  60         u32 val_high;
  61         u8   reg;
  62 };
  63
  64 static int stb6100_release(struct dvb_frontend *fe);
  65
  66 static const struct stb6100_lkup lkup[] = {
  67         {       0,  950000, 0x0a },
  68         {  950000, 1000000, 0x0a },
  69         { 1000000, 1075000, 0x0c },
  70         { 1075000, 1200000, 0x00 },
  71         { 1200000, 1300000, 0x01 },
  72         { 1300000, 1370000, 0x02 },
  73         { 1370000, 1470000, 0x04 },
  74         { 1470000, 1530000, 0x05 },
  75         { 1530000, 1650000, 0x06 },
  76         { 1650000, 1800000, 0x08 },
  77         { 1800000, 1950000, 0x0a },
  78         { 1950000, 2150000, 0x0c },
  79         { 2150000, 9999999, 0x0c },
  80         {       0,       0, 0x00 }
  81 };
  82
  83 /* Register names for easy debugging.   */
  84 static const char *stb6100_regnames[] = {
  85         [STB6100_LD]            = "LD",
  86         [STB6100_VCO]           = "VCO",
  87         [STB6100_NI]            = "NI",
  88         [STB6100_NF_LSB]        = "NF",
  89         [STB6100_K]             = "K",
  90         [STB6100_G]             = "G",
  91         [STB6100_F]             = "F",
  92         [STB6100_DLB]           = "DLB",
  93         [STB6100_TEST1]         = "TEST1",
  94         [STB6100_FCCK]          = "FCCK",
  95         [STB6100_LPEN]          = "LPEN",
  96         [STB6100_TEST3]         = "TEST3",
  97 };
  98
  99 /* Template for normalisation, i.e. setting unused or undocumented
 100  * bits as required according to the documentation.
 101  */
 102 struct stb6100_regmask {
 103         u8 mask;
 104         u8 set;
 105 };
 106
 107 static const struct stb6100_regmask stb6100_template[] = {
 108         [STB6100_LD]            = { 0xff, 0x00 },
 109         [STB6100_VCO]           = { 0xff, 0x00 },
 110         [STB6100_NI]            = { 0xff, 0x00 },
 111         [STB6100_NF_LSB]        = { 0xff, 0x00 },
 112         [STB6100_K]             = { 0xc7, 0x38 },
 113         [STB6100_G]             = { 0xef, 0x10 },
 114         [STB6100_F]             = { 0x1f, 0xc0 },
 115         [STB6100_DLB]           = { 0x38, 0xc4 },
 116         [STB6100_TEST1]         = { 0x00, 0x8f },
 117         [STB6100_FCCK]          = { 0x40, 0x0d },
 118         [STB6100_LPEN]          = { 0xf0, 0x0b },
 119         [STB6100_TEST3]         = { 0x00, 0xde },
 120 };
 121
 122 /*
 123  * Currently unused. Some boards might need it in the future
 124  */
 125 static inline void stb6100_normalise_regs(u8 regs[])
 126 {
 127         int i;
 128
 129         for (i = 0; i < STB6100_NUMREGS; i++)
 130                 regs[i] = (regs[i] & stb6100_template[i].mask) | stb6100_template[i].set;
 131 }
 132
 133 static int stb6100_read_regs(struct stb6100_state *state, u8 regs[])
 134 {
 135         int rc;
 136         struct i2c_msg msg = {
 137                 .addr   = state->config->tuner_address,
 138                 .flags  = I2C_M_RD,
 139                 .buf    = regs,
 140                 .len    = STB6100_NUMREGS
 141         };
 142
 143         rc = i2c_transfer(state->i2c, &msg, 1);
 144         if (unlikely(rc != 1)) {
 145                 dprintk(verbose, FE_ERROR, 1, "Read (0x%x) err, rc=[%d]",
 146                         state->config->tuner_address, rc);
 147
 148                 return -EREMOTEIO;
 149         }
 150         if (unlikely(verbose > FE_DEBUG)) {
 151                 int i;
 152
 153                 dprintk(verbose, FE_DEBUG, 1, "    Read from 0x%02x", state->config->tuner_address);
 154                 for (i = 0; i < STB6100_NUMREGS; i++)
 155                         dprintk(verbose, FE_DEBUG, 1, "        %s: 0x%02x", stb6100_regnames[i], regs[i]);
 156         }
 157         return 0;
 158 }
 159
 160 static int stb6100_read_reg(struct stb6100_state *state, u8 reg)
 161 {
 162         u8 regs[STB6100_NUMREGS];
 163
 164         struct i2c_msg msg = {
 165                 .addr   = state->config->tuner_address + reg,
 166                 .flags  = I2C_M_RD,
 167                 .buf    = regs,
 168                 .len    = 1
 169         };
 170
 171         i2c_transfer(state->i2c, &msg, 1);
 172
 173         if (unlikely(reg >= STB6100_NUMREGS)) {
 174                 dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg);
 175                 return -EINVAL;
 176         }
 177         if (unlikely(verbose > FE_DEBUG)) {
 178                 dprintk(verbose, FE_DEBUG, 1, "    Read from 0x%02x", state->config->tuner_address);
 179                 dprintk(verbose, FE_DEBUG, 1, "        %s: 0x%02x", stb6100_regnames[reg], regs[0]);
 180         }
 181
 182         return (unsigned int)regs[0];
 183 }
 184
 185 static int stb6100_write_reg_range(struct stb6100_state *state, u8 buf[], int start, int len)
 186 {
 187         int rc;
 188         u8 cmdbuf[MAX_XFER_SIZE];
 189         struct i2c_msg msg = {
 190                 .addr   = state->config->tuner_address,
 191                 .flags  = 0,
 192                 .buf    = cmdbuf,
 193                 .len    = len + 1
 194         };
 195
 196         if (1 + len > sizeof(cmdbuf)) {
 197                 printk(KERN_WARNING
 198                        "%s: i2c wr: len=%d is too big!\n",
 199                        KBUILD_MODNAME, len);
 200                 return -EINVAL;
 201         }
 202
 203         if (unlikely(start < 1 || start + len > STB6100_NUMREGS)) {
 204                 dprintk(verbose, FE_ERROR, 1, "Invalid register range %d:%d",
 205                         start, len);
 206                 return -EINVAL;
 207         }
 208         memcpy(&cmdbuf[1], buf, len);
 209         cmdbuf[0] = start;
 210
 211         if (unlikely(verbose > FE_DEBUG)) {
 212                 int i;
 213
 214                 dprintk(verbose, FE_DEBUG, 1, "    Write @ 0x%02x: [%d:%d]", state->config->tuner_address, start, len);
 215                 for (i = 0; i < len; i++)
 216                         dprintk(verbose, FE_DEBUG, 1, "        %s: 0x%02x", stb6100_regnames[start + i], buf[i]);
 217         }
 218         rc = i2c_transfer(state->i2c, &msg, 1);
 219         if (unlikely(rc != 1)) {
 220                 dprintk(verbose, FE_ERROR, 1, "(0x%x) write err [%d:%d], rc=[%d]",
 221                         (unsigned int)state->config->tuner_address, start, len, rc);
 222                 return -EREMOTEIO;
 223         }
 224         return 0;
 225 }
 226
 227 static int stb6100_write_reg(struct stb6100_state *state, u8 reg, u8 data)
 228 {
 229         if (unlikely(reg >= STB6100_NUMREGS)) {
 230                 dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg);
 231                 return -EREMOTEIO;
 232         }
 233         data = (data & stb6100_template[reg].mask) | stb6100_template[reg].set;
 234         return stb6100_write_reg_range(state, &data, reg, 1);
 235 }
 236
 237
 238 static int stb6100_get_status(struct dvb_frontend *fe, u32 *status)
 239 {
 240         int rc;
 241         struct stb6100_state *state = fe->tuner_priv;
 242
 243         rc = stb6100_read_reg(state, STB6100_LD);
 244         if (rc < 0) {
 245                 dprintk(verbose, FE_ERROR, 1, "%s failed", __func__);
 246                 return rc;
 247         }
 248         return (rc & STB6100_LD_LOCK) ? TUNER_STATUS_LOCKED : 0;
 249 }
 250
 251 static int stb6100_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
 252 {
 253         int rc;
 254         u8 f;
 255         struct stb6100_state *state = fe->tuner_priv;
 256
 257         rc = stb6100_read_reg(state, STB6100_F);
 258         if (rc < 0)
 259                 return rc;
 260         f = rc & STB6100_F_F;
 261
 262         state->status.bandwidth = (f + 5) * 2000;       /* x2 for ZIF   */
 263
 264         *bandwidth = state->bandwidth = state->status.bandwidth * 1000;
 265         dprintk(verbose, FE_DEBUG, 1, "bandwidth = %u Hz", state->bandwidth);
 266         return 0;
 267 }
 268
 269 static int stb6100_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
 270 {
 271         u32 tmp;
 272         int rc;
 273         struct stb6100_state *state = fe->tuner_priv;
 274
 275         dprintk(verbose, FE_DEBUG, 1, "set bandwidth to %u Hz", bandwidth);
 276
 277         bandwidth /= 2; /* ZIF */
 278
 279         if (bandwidth >= 36000000)      /* F[4:0] BW/2 max =31+5=36 mhz for F=31        */
 280                 tmp = 31;
 281         else if (bandwidth <= 5000000)  /* bw/2 min = 5Mhz for F=0                      */
 282                 tmp = 0;
 283         else                            /* if 5 < bw/2 < 36                             */
 284                 tmp = (bandwidth + 500000) / 1000000 - 5;
 285
 286         /* Turn on LPF bandwidth setting clock control,
 287          * set bandwidth, wait 10ms, turn off.
 288          */
 289         rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d | STB6100_FCCK_FCCK);
 290         if (rc < 0)
 291                 return rc;
 292         rc = stb6100_write_reg(state, STB6100_F, 0xc0 | tmp);
 293         if (rc < 0)
 294                 return rc;
 295
 296         msleep(5);  /*  This is dangerous as another (related) thread may start */
 297
 298         rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d);
 299         if (rc < 0)
 300                 return rc;
 301
 302         msleep(10);  /*  This is dangerous as another (related) thread may start */
 303
 304         return 0;
 305 }
 306
 307 static int stb6100_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 308 {
 309         int rc;
 310         u32 nint, nfrac, fvco;
 311         int psd2, odiv;
 312         struct stb6100_state *state = fe->tuner_priv;
 313         u8 regs[STB6100_NUMREGS];
 314
 315         rc = stb6100_read_regs(state, regs);
 316         if (rc < 0)
 317                 return rc;
 318
 319         odiv = (regs[STB6100_VCO] & STB6100_VCO_ODIV) >> STB6100_VCO_ODIV_SHIFT;
 320         psd2 = (regs[STB6100_K] & STB6100_K_PSD2) >> STB6100_K_PSD2_SHIFT;
 321         nint = regs[STB6100_NI];
 322         nfrac = ((regs[STB6100_K] & STB6100_K_NF_MSB) << 8) | regs[STB6100_NF_LSB];
 323         fvco = (nfrac * state->reference >> (9 - psd2)) + (nint * state->reference << psd2);
 324         *frequency = state->frequency = fvco >> (odiv + 1);
 325
 326         dprintk(verbose, FE_DEBUG, 1,
 327                 "frequency = %u kHz, odiv = %u, psd2 = %u, fxtal = %u kHz, fvco = %u kHz, N(I) = %u, N(F) = %u",
 328                 state->frequency, odiv, psd2, state->reference, fvco, nint, nfrac);
 329         return 0;
 330 }
 331
 332
 333 static int stb6100_set_frequency(struct dvb_frontend *fe, u32 frequency)
 334 {
 335         int rc;
 336         const struct stb6100_lkup *ptr;
 337         struct stb6100_state *state = fe->tuner_priv;
 338         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 339
 340         u32 srate = 0, fvco, nint, nfrac;
 341         u8 regs[STB6100_NUMREGS];
 342         u8 g, psd2, odiv;
 343
 344         dprintk(verbose, FE_DEBUG, 1, "Version 2010-8-14 13:51");
 345
 346         if (fe->ops.get_frontend) {
 347                 dprintk(verbose, FE_DEBUG, 1, "Get frontend parameters");
 348                 fe->ops.get_frontend(fe);
 349         }
 350         srate = p->symbol_rate;
 351
 352         /* Set up tuner cleanly, LPF calibration on */
 353         rc = stb6100_write_reg(state, STB6100_FCCK, 0x4d | STB6100_FCCK_FCCK);
 354         if (rc < 0)
 355                 return rc;  /* allow LPF calibration */
 356
 357         /* PLL Loop disabled, bias on, VCO on, synth on */
 358         regs[STB6100_LPEN] = 0xeb;
 359         rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN]);
 360         if (rc < 0)
 361                 return rc;
 362
 363         /* Program the registers with their data values */
 364
 365         /* VCO divide ratio (LO divide ratio, VCO prescaler enable).    */
 366         if (frequency <= 1075000)
 367                 odiv = 1;
 368         else
 369                 odiv = 0;
 370
 371         /* VCO enabled, search clock off as per LL3.7, 3.4.1 */
 372         regs[STB6100_VCO] = 0xe0 | (odiv << STB6100_VCO_ODIV_SHIFT);
 373
 374         /* OSM  */
 375         for (ptr = lkup;
 376              (ptr->val_high != 0) && !CHKRANGE(frequency, ptr->val_low, ptr->val_high);
 377              ptr++);
 378
 379         if (ptr->val_high == 0) {
 380                 printk(KERN_ERR "%s: frequency out of range: %u kHz\n", __func__, frequency);
 381                 return -EINVAL;
 382         }
 383         regs[STB6100_VCO] = (regs[STB6100_VCO] & ~STB6100_VCO_OSM) | ptr->reg;
 384         rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
 385         if (rc < 0)
 386                 return rc;
 387
 388         if ((frequency > 1075000) && (frequency <= 1325000))
 389                 psd2 = 0;
 390         else
 391                 psd2 = 1;
 392         /* F(VCO) = F(LO) * (ODIV == 0 ? 2 : 4)                 */
 393         fvco = frequency << (1 + odiv);
 394         /* N(I) = floor(f(VCO) / (f(XTAL) * (PSD2 ? 2 : 1)))    */
 395         nint = fvco / (state->reference << psd2);
 396         /* N(F) = round(f(VCO) / f(XTAL) * (PSD2 ? 2 : 1) - N(I)) * 2 ^ 9       */
 397         nfrac = DIV_ROUND_CLOSEST((fvco - (nint * state->reference << psd2))
 398                                          << (9 - psd2), state->reference);
 399
 400         /* NI */
 401         regs[STB6100_NI] = nint;
 402         rc = stb6100_write_reg(state, STB6100_NI, regs[STB6100_NI]);
 403         if (rc < 0)
 404                 return rc;
 405
 406         /* NF */
 407         regs[STB6100_NF_LSB] = nfrac;
 408         rc = stb6100_write_reg(state, STB6100_NF_LSB, regs[STB6100_NF_LSB]);
 409         if (rc < 0)
 410                 return rc;
 411
 412         /* K */
 413         regs[STB6100_K] = (0x38 & ~STB6100_K_PSD2) | (psd2 << STB6100_K_PSD2_SHIFT);
 414         regs[STB6100_K] = (regs[STB6100_K] & ~STB6100_K_NF_MSB) | ((nfrac >> 8) & STB6100_K_NF_MSB);
 415         rc = stb6100_write_reg(state, STB6100_K, regs[STB6100_K]);
 416         if (rc < 0)
 417                 return rc;
 418
 419         /* G Baseband gain. */
 420         if (srate >= 15000000)
 421                 g = 9;  /*  +4 dB */
 422         else if (srate >= 5000000)
 423                 g = 11; /*  +8 dB */
 424         else
 425                 g = 14; /* +14 dB */
 426
 427         regs[STB6100_G] = (0x10 & ~STB6100_G_G) | g;
 428         regs[STB6100_G] &= ~STB6100_G_GCT; /* mask GCT */
 429         regs[STB6100_G] |= (1 << 5); /* 2Vp-p Mode */
 430         rc = stb6100_write_reg(state, STB6100_G, regs[STB6100_G]);
 431         if (rc < 0)
 432                 return rc;
 433
 434         /* F we don't write as it is set up in BW set */
 435
 436         /* DLB set DC servo loop BW to 160Hz (LLA 3.8 / 2.1) */
 437         regs[STB6100_DLB] = 0xcc;
 438         rc = stb6100_write_reg(state, STB6100_DLB, regs[STB6100_DLB]);
 439         if (rc < 0)
 440                 return rc;
 441
 442         dprintk(verbose, FE_DEBUG, 1,
 443                 "frequency = %u, srate = %u, g = %u, odiv = %u, psd2 = %u, fxtal = %u, osm = %u, fvco = %u, N(I) = %u, N(F) = %u",
 444                 frequency, srate, (unsigned int)g, (unsigned int)odiv,
 445                 (unsigned int)psd2, state->reference,
 446                 ptr->reg, fvco, nint, nfrac);
 447
 448         /* Set up the test registers */
 449         regs[STB6100_TEST1] = 0x8f;
 450         rc = stb6100_write_reg(state, STB6100_TEST1, regs[STB6100_TEST1]);
 451         if (rc < 0)
 452                 return rc;
 453         regs[STB6100_TEST3] = 0xde;
 454         rc = stb6100_write_reg(state, STB6100_TEST3, regs[STB6100_TEST3]);
 455         if (rc < 0)
 456                 return rc;
 457
 458         /* Bring up tuner according to LLA 3.7 3.4.1, step 2 */
 459         regs[STB6100_LPEN] = 0xfb; /* PLL Loop enabled, bias on, VCO on, synth on */
 460         rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN]);
 461         if (rc < 0)
 462                 return rc;
 463
 464         msleep(2);
 465
 466         /* Bring up tuner according to LLA 3.7 3.4.1, step 3 */
 467         regs[STB6100_VCO] &= ~STB6100_VCO_OCK;          /* VCO fast search              */
 468         rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
 469         if (rc < 0)
 470                 return rc;
 471
 472         msleep(10);  /*  This is dangerous as another (related) thread may start */ /* wait for LO to lock */
 473
 474         regs[STB6100_VCO] &= ~STB6100_VCO_OSCH;         /* vco search disabled          */
 475         regs[STB6100_VCO] |= STB6100_VCO_OCK;           /* search clock off             */
 476         rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
 477         if (rc < 0)
 478                 return rc;
 479
 480         rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d);
 481         if (rc < 0)
 482                 return rc;  /* Stop LPF calibration */
 483
 484         msleep(10);  /*  This is dangerous as another (related) thread may start */
 485                      /* wait for stabilisation, (should not be necessary)               */
 486         return 0;
 487 }
 488
 489 static int stb6100_sleep(struct dvb_frontend *fe)
 490 {
 491         /* TODO: power down     */
 492         return 0;
 493 }
 494
 495 static int stb6100_init(struct dvb_frontend *fe)
 496 {
 497         struct stb6100_state *state = fe->tuner_priv;
 498         struct tuner_state *status = &state->status;
 499
 500         status->tunerstep       = 125000;
 501         status->ifreq           = 0;
 502         status->refclock        = 27000000;     /* Hz   */
 503         status->iqsense         = 1;
 504         status->bandwidth       = 36000;        /* kHz  */
 505         state->bandwidth        = status->bandwidth * 1000;     /* Hz   */
 506         state->reference        = status->refclock / 1000;      /* kHz  */
 507
 508         /* Set default bandwidth. Modified, PN 13-May-10        */
 509         return 0;
 510 }
 511
 512 static int stb6100_get_state(struct dvb_frontend *fe,
 513                              enum tuner_param param,
 514                              struct tuner_state *state)
 515 {
 516         switch (param) {
 517         case DVBFE_TUNER_FREQUENCY:
 518                 stb6100_get_frequency(fe, &state->frequency);
 519                 break;
 520         case DVBFE_TUNER_TUNERSTEP:
 521                 break;
 522         case DVBFE_TUNER_IFFREQ:
 523                 break;
 524         case DVBFE_TUNER_BANDWIDTH:
 525                 stb6100_get_bandwidth(fe, &state->bandwidth);
 526                 break;
 527         case DVBFE_TUNER_REFCLOCK:
 528                 break;
 529         default:
 530                 break;
 531         }
 532
 533         return 0;
 534 }
 535
 536 static int stb6100_set_state(struct dvb_frontend *fe,
 537                              enum tuner_param param,
 538                              struct tuner_state *state)
 539 {
 540         struct stb6100_state *tstate = fe->tuner_priv;
 541
 542         switch (param) {
 543         case DVBFE_TUNER_FREQUENCY:
 544                 stb6100_set_frequency(fe, state->frequency);
 545                 tstate->frequency = state->frequency;
 546                 break;
 547         case DVBFE_TUNER_TUNERSTEP:
 548                 break;
 549         case DVBFE_TUNER_IFFREQ:
 550                 break;
 551         case DVBFE_TUNER_BANDWIDTH:
 552                 stb6100_set_bandwidth(fe, state->bandwidth);
 553                 tstate->bandwidth = state->bandwidth;
 554                 break;
 555         case DVBFE_TUNER_REFCLOCK:
 556                 break;
 557         default:
 558                 break;
 559         }
 560
 561         return 0;
 562 }
 563
 564 static struct dvb_tuner_ops stb6100_ops = {
 565         .info = {
 566                 .name                   = "STB6100 Silicon Tuner",
 567                 .frequency_min          = 950000,
 568                 .frequency_max          = 2150000,
 569                 .frequency_step         = 0,
 570         },
 571
 572         .init           = stb6100_init,
 573         .sleep          = stb6100_sleep,
 574         .get_status     = stb6100_get_status,
 575         .get_state      = stb6100_get_state,
 576         .set_state      = stb6100_set_state,
 577         .release        = stb6100_release
 578 };
 579
 580 struct dvb_frontend *stb6100_attach(struct dvb_frontend *fe,
 581                                     const struct stb6100_config *config,
 582                                     struct i2c_adapter *i2c)
 583 {
 584         struct stb6100_state *state = NULL;
 585
 586         state = kzalloc(sizeof (struct stb6100_state), GFP_KERNEL);
 587         if (!state)
 588                 return NULL;
 589
 590         state->config           = config;
 591         state->i2c              = i2c;
 592         state->frontend         = fe;
 593         state->reference        = config->refclock / 1000; /* kHz */
 594         fe->tuner_priv          = state;
 595         fe->ops.tuner_ops       = stb6100_ops;
 596
 597         printk("%s: Attaching STB6100 \n", __func__);
 598         return fe;
 599 }
 600
 601 static int stb6100_release(struct dvb_frontend *fe)
 602 {
 603         struct stb6100_state *state = fe->tuner_priv;
 604
 605         fe->tuner_priv = NULL;
 606         kfree(state);
 607
 608         return 0;
 609 }
 610
 611 EXPORT_SYMBOL(stb6100_attach);
 612 MODULE_PARM_DESC(verbose, "Set Verbosity level");
 613
 614 MODULE_AUTHOR("Manu Abraham");
 615 MODULE_DESCRIPTION("STB6100 Silicon tuner");
 616 MODULE_LICENSE("GPL");