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dvb-pll.c

/*
 * descriptions + helper functions for simple dvb plls.
 *
 * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/dvb/frontend.h>
#include <asm/types.h>

#include "dvb-pll.h"

struct dvb_pll_priv {
      /* pll number */
      int nr;

      /* i2c details */
      int pll_i2c_address;
      struct i2c_adapter *i2c;

      /* the PLL descriptor */
      struct dvb_pll_desc *pll_desc;

      /* cached frequency/bandwidth */
      u32 frequency;
      u32 bandwidth;
};

#define DVB_PLL_MAX 64

static unsigned int dvb_pll_devcount;

static int debug = 0;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "enable verbose debug messages");

static unsigned int input[DVB_PLL_MAX] = { [ 0 ... (DVB_PLL_MAX-1) ] = 0 };
module_param_array(input, int, NULL, 0644);
MODULE_PARM_DESC(input,"specify rf input choice, 0 for autoselect (default)");

static unsigned int id[DVB_PLL_MAX] =
      { [ 0 ... (DVB_PLL_MAX-1) ] = DVB_PLL_UNDEFINED };
module_param_array(id, int, NULL, 0644);
MODULE_PARM_DESC(id, "force pll id to use (DEBUG ONLY)");

/* ----------------------------------------------------------- */

struct dvb_pll_desc {
      char *name;
      u32  min;
      u32  max;
      u32  iffreq;
      void (*set)(struct dvb_frontend *fe, u8 *buf,
                const struct dvb_frontend_parameters *params);
      u8   *initdata;
      u8   *sleepdata;
      int  count;
      struct {
            u32 limit;
            u32 stepsize;
            u8  config;
            u8  cb;
      } entries[12];
};

/* ----------------------------------------------------------- */
/* descriptions                                                */

/* Set AGC TOP value to 103 dBuV:
      0x80 = Control Byte
      0x40 = 250 uA charge pump (irrelevant)
      0x18 = Aux Byte to follow
      0x06 = 64.5 kHz divider (irrelevant)
      0x01 = Disable Vt (aka sleep)

      0x00 = AGC Time constant 2s Iagc = 300 nA (vs 0x80 = 9 nA)
      0x50 = AGC Take over point = 103 dBuV */
static u8 tua603x_agc103[] = { 2, 0x80|0x40|0x18|0x06|0x01, 0x00|0x50 };

/*    0x04 = 166.67 kHz divider

      0x80 = AGC Time constant 50ms Iagc = 9 uA
      0x20 = AGC Take over point = 112 dBuV */
static u8 tua603x_agc112[] = { 2, 0x80|0x40|0x18|0x04|0x01, 0x80|0x20 };

static struct dvb_pll_desc dvb_pll_thomson_dtt7579 = {
      .name  = "Thomson dtt7579",
      .min   = 177000000,
      .max   = 858000000,
      .iffreq= 36166667,
      .sleepdata = (u8[]){ 2, 0xb4, 0x03 },
      .count = 4,
      .entries = {
            {  443250000, 166667, 0xb4, 0x02 },
            {  542000000, 166667, 0xb4, 0x08 },
            {  771000000, 166667, 0xbc, 0x08 },
            {  999999999, 166667, 0xf4, 0x08 },
      },
};

static struct dvb_pll_desc dvb_pll_thomson_dtt7610 = {
      .name  = "Thomson dtt7610",
      .min   =  44000000,
      .max   = 958000000,
      .iffreq= 44000000,
      .count = 3,
      .entries = {
            { 157250000, 62500, 0x8e, 0x39 },
            { 454000000, 62500, 0x8e, 0x3a },
            { 999999999, 62500, 0x8e, 0x3c },
      },
};

static void thomson_dtt759x_bw(struct dvb_frontend *fe, u8 *buf,
                         const struct dvb_frontend_parameters *params)
{
      if (BANDWIDTH_7_MHZ == params->u.ofdm.bandwidth)
            buf[3] |= 0x10;
}

static struct dvb_pll_desc dvb_pll_thomson_dtt759x = {
      .name  = "Thomson dtt759x",
      .min   = 177000000,
      .max   = 896000000,
      .set   = thomson_dtt759x_bw,
      .iffreq= 36166667,
      .sleepdata = (u8[]){ 2, 0x84, 0x03 },
      .count = 5,
      .entries = {
            {  264000000, 166667, 0xb4, 0x02 },
            {  470000000, 166667, 0xbc, 0x02 },
            {  735000000, 166667, 0xbc, 0x08 },
            {  835000000, 166667, 0xf4, 0x08 },
            {  999999999, 166667, 0xfc, 0x08 },
      },
};

static struct dvb_pll_desc dvb_pll_lg_z201 = {
      .name  = "LG z201",
      .min   = 174000000,
      .max   = 862000000,
      .iffreq= 36166667,
      .sleepdata = (u8[]){ 2, 0xbc, 0x03 },
      .count = 5,
      .entries = {
            {  157500000, 166667, 0xbc, 0x01 },
            {  443250000, 166667, 0xbc, 0x02 },
            {  542000000, 166667, 0xbc, 0x04 },
            {  830000000, 166667, 0xf4, 0x04 },
            {  999999999, 166667, 0xfc, 0x04 },
      },
};

static struct dvb_pll_desc dvb_pll_microtune_4042 = {
      .name  = "Microtune 4042 FI5",
      .min   =  57000000,
      .max   = 858000000,
      .iffreq= 44000000,
      .count = 3,
      .entries = {
            { 162000000, 62500, 0x8e, 0xa1 },
            { 457000000, 62500, 0x8e, 0x91 },
            { 999999999, 62500, 0x8e, 0x31 },
      },
};

static struct dvb_pll_desc dvb_pll_thomson_dtt761x = {
      /* DTT 7611 7611A 7612 7613 7613A 7614 7615 7615A */
      .name  = "Thomson dtt761x",
      .min   =  57000000,
      .max   = 863000000,
      .iffreq= 44000000,
      .count = 3,
      .initdata = tua603x_agc103,
      .entries = {
            { 147000000, 62500, 0x8e, 0x39 },
            { 417000000, 62500, 0x8e, 0x3a },
            { 999999999, 62500, 0x8e, 0x3c },
      },
};

static struct dvb_pll_desc dvb_pll_unknown_1 = {
      .name  = "unknown 1", /* used by dntv live dvb-t */
      .min   = 174000000,
      .max   = 862000000,
      .iffreq= 36166667,
      .count = 9,
      .entries = {
            {  150000000, 166667, 0xb4, 0x01 },
            {  173000000, 166667, 0xbc, 0x01 },
            {  250000000, 166667, 0xb4, 0x02 },
            {  400000000, 166667, 0xbc, 0x02 },
            {  420000000, 166667, 0xf4, 0x02 },
            {  470000000, 166667, 0xfc, 0x02 },
            {  600000000, 166667, 0xbc, 0x08 },
            {  730000000, 166667, 0xf4, 0x08 },
            {  999999999, 166667, 0xfc, 0x08 },
      },
};

/* Infineon TUA6010XS
 * used in Thomson Cable Tuner
 */
static struct dvb_pll_desc dvb_pll_tua6010xs = {
      .name  = "Infineon TUA6010XS",
      .min   =  44250000,
      .max   = 858000000,
      .iffreq= 36125000,
      .count = 3,
      .entries = {
            {  115750000, 62500, 0x8e, 0x03 },
            {  403250000, 62500, 0x8e, 0x06 },
            {  999999999, 62500, 0x8e, 0x85 },
      },
};

/* Panasonic env57h1xd5 (some Philips PLL ?) */
static struct dvb_pll_desc dvb_pll_env57h1xd5 = {
      .name  = "Panasonic ENV57H1XD5",
      .min   =  44250000,
      .max   = 858000000,
      .iffreq= 36125000,
      .count = 4,
      .entries = {
            {  153000000, 166667, 0xc2, 0x41 },
            {  470000000, 166667, 0xc2, 0x42 },
            {  526000000, 166667, 0xc2, 0x84 },
            {  999999999, 166667, 0xc2, 0xa4 },
      },
};

/* Philips TDA6650/TDA6651
 * used in Panasonic ENV77H11D5
 */
static void tda665x_bw(struct dvb_frontend *fe, u8 *buf,
                   const struct dvb_frontend_parameters *params)
{
      if (params->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
            buf[3] |= 0x08;
}

static struct dvb_pll_desc dvb_pll_tda665x = {
      .name  = "Philips TDA6650/TDA6651",
      .min   =  44250000,
      .max   = 858000000,
      .set   = tda665x_bw,
      .iffreq= 36166667,
      .initdata = (u8[]){ 4, 0x0b, 0xf5, 0x85, 0xab },
      .count = 12,
      .entries = {
            {   93834000, 166667, 0xca, 0x61 /* 011 0 0 0  01 */ },
            {  123834000, 166667, 0xca, 0xa1 /* 101 0 0 0  01 */ },
            {  161000000, 166667, 0xca, 0xa1 /* 101 0 0 0  01 */ },
            {  163834000, 166667, 0xca, 0xc2 /* 110 0 0 0  10 */ },
            {  253834000, 166667, 0xca, 0x62 /* 011 0 0 0  10 */ },
            {  383834000, 166667, 0xca, 0xa2 /* 101 0 0 0  10 */ },
            {  443834000, 166667, 0xca, 0xc2 /* 110 0 0 0  10 */ },
            {  444000000, 166667, 0xca, 0xc4 /* 110 0 0 1  00 */ },
            {  583834000, 166667, 0xca, 0x64 /* 011 0 0 1  00 */ },
            {  793834000, 166667, 0xca, 0xa4 /* 101 0 0 1  00 */ },
            {  444834000, 166667, 0xca, 0xc4 /* 110 0 0 1  00 */ },
            {  861000000, 166667, 0xca, 0xe4 /* 111 0 0 1  00 */ },
      }
};

/* Infineon TUA6034
 * used in LG TDTP E102P
 */
static void tua6034_bw(struct dvb_frontend *fe, u8 *buf,
                   const struct dvb_frontend_parameters *params)
{
      if (BANDWIDTH_7_MHZ != params->u.ofdm.bandwidth)
            buf[3] |= 0x08;
}

static struct dvb_pll_desc dvb_pll_tua6034 = {
      .name  = "Infineon TUA6034",
      .min   =  44250000,
      .max   = 858000000,
      .iffreq= 36166667,
      .count = 3,
      .set   = tua6034_bw,
      .entries = {
            {  174500000, 62500, 0xce, 0x01 },
            {  230000000, 62500, 0xce, 0x02 },
            {  999999999, 62500, 0xce, 0x04 },
      },
};

/* Infineon TUA6034
 * used in LG TDVS-H061F, LG TDVS-H062F and LG TDVS-H064F
 */
static struct dvb_pll_desc dvb_pll_lg_tdvs_h06xf = {
      .name  = "LG TDVS-H06xF",
      .min   =  54000000,
      .max   = 863000000,
      .iffreq= 44000000,
      .initdata = tua603x_agc103,
      .count = 3,
      .entries = {
            {  165000000, 62500, 0xce, 0x01 },
            {  450000000, 62500, 0xce, 0x02 },
            {  999999999, 62500, 0xce, 0x04 },
      },
};

/* Philips FMD1216ME
 * used in Medion Hybrid PCMCIA card and USB Box
 */
static void fmd1216me_bw(struct dvb_frontend *fe, u8 *buf,
                   const struct dvb_frontend_parameters *params)
{
      if (params->u.ofdm.bandwidth == BANDWIDTH_8_MHZ &&
          params->frequency >= 158870000)
            buf[3] |= 0x08;
}

static struct dvb_pll_desc dvb_pll_fmd1216me = {
      .name = "Philips FMD1216ME",
      .min = 50870000,
      .max = 858000000,
      .iffreq= 36125000,
      .set   = fmd1216me_bw,
      .initdata = tua603x_agc112,
      .sleepdata = (u8[]){ 4, 0x9c, 0x60, 0x85, 0x54 },
      .count = 7,
      .entries = {
            { 143870000, 166667, 0xbc, 0x41 },
            { 158870000, 166667, 0xf4, 0x41 },
            { 329870000, 166667, 0xbc, 0x42 },
            { 441870000, 166667, 0xf4, 0x42 },
            { 625870000, 166667, 0xbc, 0x44 },
            { 803870000, 166667, 0xf4, 0x44 },
            { 999999999, 166667, 0xfc, 0x44 },
      }
};

/* ALPS TDED4
 * used in Nebula-Cards and USB boxes
 */
static void tded4_bw(struct dvb_frontend *fe, u8 *buf,
                 const struct dvb_frontend_parameters *params)
{
      if (params->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
            buf[3] |= 0x04;
}

static struct dvb_pll_desc dvb_pll_tded4 = {
      .name = "ALPS TDED4",
      .min = 47000000,
      .max = 863000000,
      .iffreq= 36166667,
      .set   = tded4_bw,
      .count = 4,
      .entries = {
            { 153000000, 166667, 0x85, 0x01 },
            { 470000000, 166667, 0x85, 0x02 },
            { 823000000, 166667, 0x85, 0x08 },
            { 999999999, 166667, 0x85, 0x88 },
      }
};

/* ALPS TDHU2
 * used in AverTVHD MCE A180
 */
static struct dvb_pll_desc dvb_pll_tdhu2 = {
      .name = "ALPS TDHU2",
      .min = 54000000,
      .max = 864000000,
      .iffreq= 44000000,
      .count = 4,
      .entries = {
            { 162000000, 62500, 0x85, 0x01 },
            { 426000000, 62500, 0x85, 0x02 },
            { 782000000, 62500, 0x85, 0x08 },
            { 999999999, 62500, 0x85, 0x88 },
      }
};

/* Philips TUV1236D
 * used in ATI HDTV Wonder
 */
static void tuv1236d_rf(struct dvb_frontend *fe, u8 *buf,
                  const struct dvb_frontend_parameters *params)
{
      struct dvb_pll_priv *priv = fe->tuner_priv;
      unsigned int new_rf = input[priv->nr];

      if ((new_rf == 0) || (new_rf > 2)) {
            switch (params->u.vsb.modulation) {
                  case QAM_64:
                  case QAM_256:
                        new_rf = 1;
                        break;
                  case VSB_8:
                  default:
                        new_rf = 2;
            }
      }

      switch (new_rf) {
            case 1:
                  buf[3] |= 0x08;
                  break;
            case 2:
                  buf[3] &= ~0x08;
                  break;
            default:
                  printk(KERN_WARNING
                         "%s: unhandled rf input selection: %d",
                         __FUNCTION__, new_rf);
      }
}

static struct dvb_pll_desc dvb_pll_tuv1236d = {
      .name  = "Philips TUV1236D",
      .min   =  54000000,
      .max   = 864000000,
      .iffreq= 44000000,
      .set   = tuv1236d_rf,
      .count = 3,
      .entries = {
            { 157250000, 62500, 0xc6, 0x41 },
            { 454000000, 62500, 0xc6, 0x42 },
            { 999999999, 62500, 0xc6, 0x44 },
      },
};

/* Samsung TBMV30111IN / TBMV30712IN1
 * used in Air2PC ATSC - 2nd generation (nxt2002)
 */
static struct dvb_pll_desc dvb_pll_samsung_tbmv = {
      .name = "Samsung TBMV30111IN / TBMV30712IN1",
      .min = 54000000,
      .max = 860000000,
      .iffreq= 44000000,
      .count = 6,
      .entries = {
            { 172000000, 166667, 0xb4, 0x01 },
            { 214000000, 166667, 0xb4, 0x02 },
            { 467000000, 166667, 0xbc, 0x02 },
            { 721000000, 166667, 0xbc, 0x08 },
            { 841000000, 166667, 0xf4, 0x08 },
            { 999999999, 166667, 0xfc, 0x02 },
      }
};

/*
 * Philips SD1878 Tuner.
 */
static struct dvb_pll_desc dvb_pll_philips_sd1878_tda8261 = {
      .name  = "Philips SD1878",
      .min   =  950000,
      .max   = 2150000,
      .iffreq= 249, /* zero-IF, offset 249 is to round up */
      .count = 4,
      .entries = {
            { 1250000, 500, 0xc4, 0x00},
            { 1550000, 500, 0xc4, 0x40},
            { 2050000, 500, 0xc4, 0x80},
            { 2150000, 500, 0xc4, 0xc0},
      },
};

/*
 * Philips TD1316 Tuner.
 */
static void td1316_bw(struct dvb_frontend *fe, u8 *buf,
                  const struct dvb_frontend_parameters *params)
{
      u8 band;

      /* determine band */
      if (params->frequency < 161000000)
            band = 1;
      else if (params->frequency < 444000000)
            band = 2;
      else
            band = 4;

      buf[3] |= band;

      /* setup PLL filter */
      if (params->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
            buf[3] |= 1 << 3;
}

static struct dvb_pll_desc dvb_pll_philips_td1316 = {
      .name  = "Philips TD1316",
      .min   =  87000000,
      .max   = 895000000,
      .iffreq= 36166667,
      .set   = td1316_bw,
      .count = 9,
      .entries = {
            {  93834000, 166667, 0xca, 0x60},
            { 123834000, 166667, 0xca, 0xa0},
            { 163834000, 166667, 0xca, 0xc0},
            { 253834000, 166667, 0xca, 0x60},
            { 383834000, 166667, 0xca, 0xa0},
            { 443834000, 166667, 0xca, 0xc0},
            { 583834000, 166667, 0xca, 0x60},
            { 793834000, 166667, 0xca, 0xa0},
            { 858834000, 166667, 0xca, 0xe0},
      },
};

/* FE6600 used on DViCO Hybrid */
static struct dvb_pll_desc dvb_pll_thomson_fe6600 = {
      .name = "Thomson FE6600",
      .min =  44250000,
      .max = 858000000,
      .iffreq= 36125000,
      .count = 4,
      .entries = {
            { 250000000, 166667, 0xb4, 0x12 },
            { 455000000, 166667, 0xfe, 0x11 },
            { 775500000, 166667, 0xbc, 0x18 },
            { 999999999, 166667, 0xf4, 0x18 },
      }
};

static void opera1_bw(struct dvb_frontend *fe, u8 *buf,
                  const struct dvb_frontend_parameters *params)
{
      if (params->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
            buf[2] |= 0x08;
}

static struct dvb_pll_desc dvb_pll_opera1 = {
      .name  = "Opera Tuner",
      .min   =  900000,
      .max   = 2250000,
      .iffreq= 0,
      .set   = opera1_bw,
      .count = 8,
      .entries = {
            { 1064000, 500, 0xe5, 0xc6 },
            { 1169000, 500, 0xe5, 0xe6 },
            { 1299000, 500, 0xe5, 0x24 },
            { 1444000, 500, 0xe5, 0x44 },
            { 1606000, 500, 0xe5, 0x64 },
            { 1777000, 500, 0xe5, 0x84 },
            { 1941000, 500, 0xe5, 0xa4 },
            { 2250000, 500, 0xe5, 0xc4 },
      }
};

/* Philips FCV1236D
 */
static struct dvb_pll_desc dvb_pll_fcv1236d = {
/* Bit_0: RF Input select
 * Bit_1: 0=digital, 1=analog
 */
      .name  = "Philips FCV1236D",
      .min   =  53000000,
      .max   = 803000000,
      .iffreq= 44000000,
      .count = 3,
      .entries = {
            { 159000000, 62500, 0x8e, 0xa0 },
            { 453000000, 62500, 0x8e, 0x90 },
            { 999999999, 62500, 0x8e, 0x30 },
      },
};

/* ----------------------------------------------------------- */

static struct dvb_pll_desc *pll_list[] = {
      [DVB_PLL_UNDEFINED]              = NULL,
      [DVB_PLL_THOMSON_DTT7579]        = &dvb_pll_thomson_dtt7579,
      [DVB_PLL_THOMSON_DTT759X]        = &dvb_pll_thomson_dtt759x,
      [DVB_PLL_THOMSON_DTT7610]        = &dvb_pll_thomson_dtt7610,
      [DVB_PLL_LG_Z201]                = &dvb_pll_lg_z201,
      [DVB_PLL_MICROTUNE_4042]         = &dvb_pll_microtune_4042,
      [DVB_PLL_THOMSON_DTT761X]        = &dvb_pll_thomson_dtt761x,
      [DVB_PLL_UNKNOWN_1]              = &dvb_pll_unknown_1,
      [DVB_PLL_TUA6010XS]              = &dvb_pll_tua6010xs,
      [DVB_PLL_ENV57H1XD5]             = &dvb_pll_env57h1xd5,
      [DVB_PLL_TUA6034]                = &dvb_pll_tua6034,
      [DVB_PLL_LG_TDVS_H06XF]          = &dvb_pll_lg_tdvs_h06xf,
      [DVB_PLL_TDA665X]                = &dvb_pll_tda665x,
      [DVB_PLL_FMD1216ME]              = &dvb_pll_fmd1216me,
      [DVB_PLL_TDED4]                  = &dvb_pll_tded4,
      [DVB_PLL_TUV1236D]               = &dvb_pll_tuv1236d,
      [DVB_PLL_TDHU2]                  = &dvb_pll_tdhu2,
      [DVB_PLL_SAMSUNG_TBMV]           = &dvb_pll_samsung_tbmv,
      [DVB_PLL_PHILIPS_SD1878_TDA8261] = &dvb_pll_philips_sd1878_tda8261,
      [DVB_PLL_PHILIPS_TD1316]         = &dvb_pll_philips_td1316,
      [DVB_PLL_THOMSON_FE6600]         = &dvb_pll_thomson_fe6600,
      [DVB_PLL_OPERA1]                 = &dvb_pll_opera1,
      [DVB_PLL_FCV1236D]               = &dvb_pll_fcv1236d,
};

/* ----------------------------------------------------------- */
/* code                                                        */

static int dvb_pll_configure(struct dvb_frontend *fe, u8 *buf,
                       const struct dvb_frontend_parameters *params)
{
      struct dvb_pll_priv *priv = fe->tuner_priv;
      struct dvb_pll_desc *desc = priv->pll_desc;
      u32 div;
      int i;

      if (params->frequency != 0 && (params->frequency < desc->min ||
                               params->frequency > desc->max))
            return -EINVAL;

      for (i = 0; i < desc->count; i++) {
            if (params->frequency > desc->entries[i].limit)
                  continue;
            break;
      }

      if (debug)
            printk("pll: %s: freq=%d | i=%d/%d\n", desc->name,
                   params->frequency, i, desc->count);
      if (i == desc->count)
            return -EINVAL;

      div = (params->frequency + desc->iffreq +
             desc->entries[i].stepsize/2) / desc->entries[i].stepsize;
      buf[0] = div >> 8;
      buf[1] = div & 0xff;
      buf[2] = desc->entries[i].config;
      buf[3] = desc->entries[i].cb;

      if (desc->set)
            desc->set(fe, buf, params);

      if (debug)
            printk("pll: %s: div=%d | buf=0x%02x,0x%02x,0x%02x,0x%02x\n",
                   desc->name, div, buf[0], buf[1], buf[2], buf[3]);

      // calculate the frequency we set it to
      return (div * desc->entries[i].stepsize) - desc->iffreq;
}

static int dvb_pll_release(struct dvb_frontend *fe)
{
      kfree(fe->tuner_priv);
      fe->tuner_priv = NULL;
      return 0;
}

static int dvb_pll_sleep(struct dvb_frontend *fe)
{
      struct dvb_pll_priv *priv = fe->tuner_priv;

      if (priv->i2c == NULL)
            return -EINVAL;

      if (priv->pll_desc->sleepdata) {
            struct i2c_msg msg = { .flags = 0,
                  .addr = priv->pll_i2c_address,
                  .buf = priv->pll_desc->sleepdata + 1,
                  .len = priv->pll_desc->sleepdata[0] };

            int result;

            if (fe->ops.i2c_gate_ctrl)
                  fe->ops.i2c_gate_ctrl(fe, 1);
            if ((result = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
                  return result;
            }
            return 0;
      }
      /* Shouldn't be called when initdata is NULL, maybe BUG()? */
      return -EINVAL;
}

static int dvb_pll_set_params(struct dvb_frontend *fe,
                        struct dvb_frontend_parameters *params)
{
      struct dvb_pll_priv *priv = fe->tuner_priv;
      u8 buf[4];
      struct i2c_msg msg =
            { .addr = priv->pll_i2c_address, .flags = 0,
              .buf = buf, .len = sizeof(buf) };
      int result;
      u32 frequency = 0;

      if (priv->i2c == NULL)
            return -EINVAL;

      if ((result = dvb_pll_configure(fe, buf, params)) < 0)
            return result;
      else
            frequency = result;

      if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 1);
      if ((result = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
            return result;
      }

      priv->frequency = frequency;
      priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;

      return 0;
}

static int dvb_pll_calc_regs(struct dvb_frontend *fe,
                       struct dvb_frontend_parameters *params,
                       u8 *buf, int buf_len)
{
      struct dvb_pll_priv *priv = fe->tuner_priv;
      int result;
      u32 frequency = 0;

      if (buf_len < 5)
            return -EINVAL;

      if ((result = dvb_pll_configure(fe, buf+1, params)) < 0)
            return result;
      else
            frequency = result;

      buf[0] = priv->pll_i2c_address;

      priv->frequency = frequency;
      priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;

      return 5;
}

static int dvb_pll_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
      struct dvb_pll_priv *priv = fe->tuner_priv;
      *frequency = priv->frequency;
      return 0;
}

static int dvb_pll_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
{
      struct dvb_pll_priv *priv = fe->tuner_priv;
      *bandwidth = priv->bandwidth;
      return 0;
}

static int dvb_pll_init(struct dvb_frontend *fe)
{
      struct dvb_pll_priv *priv = fe->tuner_priv;

      if (priv->i2c == NULL)
            return -EINVAL;

      if (priv->pll_desc->initdata) {
            struct i2c_msg msg = { .flags = 0,
                  .addr = priv->pll_i2c_address,
                  .buf = priv->pll_desc->initdata + 1,
                  .len = priv->pll_desc->initdata[0] };

            int result;
            if (fe->ops.i2c_gate_ctrl)
                  fe->ops.i2c_gate_ctrl(fe, 1);
            if ((result = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
                  return result;
            }
            return 0;
      }
      /* Shouldn't be called when initdata is NULL, maybe BUG()? */
      return -EINVAL;
}

static struct dvb_tuner_ops dvb_pll_tuner_ops = {
      .release = dvb_pll_release,
      .sleep = dvb_pll_sleep,
      .init = dvb_pll_init,
      .set_params = dvb_pll_set_params,
      .calc_regs = dvb_pll_calc_regs,
      .get_frequency = dvb_pll_get_frequency,
      .get_bandwidth = dvb_pll_get_bandwidth,
};

struct dvb_frontend *dvb_pll_attach(struct dvb_frontend *fe, int pll_addr,
                            struct i2c_adapter *i2c,
                            unsigned int pll_desc_id)
{
      u8 b1 [] = { 0 };
      struct i2c_msg msg = { .addr = pll_addr, .flags = I2C_M_RD,
                         .buf = b1, .len = 1 };
      struct dvb_pll_priv *priv = NULL;
      int ret;
      struct dvb_pll_desc *desc;

      if ((id[dvb_pll_devcount] > DVB_PLL_UNDEFINED) &&
          (id[dvb_pll_devcount] < ARRAY_SIZE(pll_list)))
            pll_desc_id = id[dvb_pll_devcount];

      BUG_ON(pll_desc_id < 1 || pll_desc_id >= ARRAY_SIZE(pll_list));

      desc = pll_list[pll_desc_id];

      if (i2c != NULL) {
            if (fe->ops.i2c_gate_ctrl)
                  fe->ops.i2c_gate_ctrl(fe, 1);

            ret = i2c_transfer (i2c, &msg, 1);
            if (ret != 1)
                  return NULL;
            if (fe->ops.i2c_gate_ctrl)
                       fe->ops.i2c_gate_ctrl(fe, 0);
      }

      priv = kzalloc(sizeof(struct dvb_pll_priv), GFP_KERNEL);
      if (priv == NULL)
            return NULL;

      priv->pll_i2c_address = pll_addr;
      priv->i2c = i2c;
      priv->pll_desc = desc;
      priv->nr = dvb_pll_devcount++;

      memcpy(&fe->ops.tuner_ops, &dvb_pll_tuner_ops,
             sizeof(struct dvb_tuner_ops));

      strncpy(fe->ops.tuner_ops.info.name, desc->name,
            sizeof(fe->ops.tuner_ops.info.name));
      fe->ops.tuner_ops.info.frequency_min = desc->min;
      fe->ops.tuner_ops.info.frequency_max = desc->max;
      if (!desc->initdata)
            fe->ops.tuner_ops.init = NULL;
      if (!desc->sleepdata)
            fe->ops.tuner_ops.sleep = NULL;

      fe->tuner_priv = priv;

      if ((debug) || (id[priv->nr] == pll_desc_id)) {
            printk("dvb-pll[%d]", priv->nr);
            if (i2c != NULL)
                  printk(" %d-%04x", i2c_adapter_id(i2c), pll_addr);
            printk(": id# %d (%s) attached, %s\n", pll_desc_id, desc->name,
                   id[priv->nr] == pll_desc_id ?
                        "insmod option" : "autodetected");
      }
      if ((debug) || (input[priv->nr] > 0)) {
            printk("dvb-pll[%d]", priv->nr);
            if (i2c != NULL)
                  printk(" %d-%04x", i2c_adapter_id(i2c), pll_addr);
            printk(": tuner rf input will be ");
            switch (input[priv->nr]) {
            case 0:
                  printk("autoselected\n");
                  break;
            default:
                  printk("set to input %d (insmod option)\n",
                         input[priv->nr]);
            }
      }

      return fe;
}
EXPORT_SYMBOL(dvb_pll_attach);

MODULE_DESCRIPTION("dvb pll library");
MODULE_AUTHOR("Gerd Knorr");
MODULE_LICENSE("GPL");

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