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tda827x.c

/*
 *
 * (c) 2005 Hartmut Hackmann
 * (c) 2007 Michael Krufky
 *
 *  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 "tda827x.h"

static int debug = 0;
#define dprintk(args...) \
      do {                              \
            if (debug) printk(KERN_DEBUG "tda827x: " args); \
      } while (0)

struct tda827x_priv {
      int i2c_addr;
      struct i2c_adapter *i2c_adap;
      struct tda827x_config *cfg;
      u32 frequency;
      u32 bandwidth;
};

struct tda827x_data {
      u32 lomax;
      u8  spd;
      u8  bs;
      u8  bp;
      u8  cp;
      u8  gc3;
      u8 div1p5;
};

static const struct tda827x_data tda827x_dvbt[] = {
      { .lomax =  62000000, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 1},
      { .lomax =  66000000, .spd = 3, .bs = 3, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 1},
      { .lomax =  76000000, .spd = 3, .bs = 1, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 0},
      { .lomax =  84000000, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 0},
      { .lomax =  93000000, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 1, .div1p5 = 0},
      { .lomax =  98000000, .spd = 3, .bs = 3, .bp = 0, .cp = 0, .gc3 = 1, .div1p5 = 0},
      { .lomax = 109000000, .spd = 3, .bs = 3, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0},
      { .lomax = 123000000, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 1},
      { .lomax = 133000000, .spd = 2, .bs = 3, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 1},
      { .lomax = 151000000, .spd = 2, .bs = 1, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0},
      { .lomax = 154000000, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0},
      { .lomax = 181000000, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 0, .div1p5 = 0},
      { .lomax = 185000000, .spd = 2, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
      { .lomax = 217000000, .spd = 2, .bs = 3, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
      { .lomax = 244000000, .spd = 1, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 1},
      { .lomax = 265000000, .spd = 1, .bs = 3, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 1},
      { .lomax = 302000000, .spd = 1, .bs = 1, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
      { .lomax = 324000000, .spd = 1, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
      { .lomax = 370000000, .spd = 1, .bs = 2, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0},
      { .lomax = 454000000, .spd = 1, .bs = 3, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0},
      { .lomax = 493000000, .spd = 0, .bs = 2, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 1},
      { .lomax = 530000000, .spd = 0, .bs = 3, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 1},
      { .lomax = 554000000, .spd = 0, .bs = 1, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0},
      { .lomax = 604000000, .spd = 0, .bs = 1, .bp = 4, .cp = 0, .gc3 = 0, .div1p5 = 0},
      { .lomax = 696000000, .spd = 0, .bs = 2, .bp = 4, .cp = 0, .gc3 = 0, .div1p5 = 0},
      { .lomax = 740000000, .spd = 0, .bs = 2, .bp = 4, .cp = 1, .gc3 = 0, .div1p5 = 0},
      { .lomax = 820000000, .spd = 0, .bs = 3, .bp = 4, .cp = 0, .gc3 = 0, .div1p5 = 0},
      { .lomax = 865000000, .spd = 0, .bs = 3, .bp = 4, .cp = 1, .gc3 = 0, .div1p5 = 0},
      { .lomax =         0, .spd = 0, .bs = 0, .bp = 0, .cp = 0, .gc3 = 0, .div1p5 = 0}
};

static int tda827xo_set_params(struct dvb_frontend *fe,
                         struct dvb_frontend_parameters *params)
{
      struct tda827x_priv *priv = fe->tuner_priv;
      u8 buf[14];

      struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
                         .buf = buf, .len = sizeof(buf) };
      int i, tuner_freq, if_freq;
      u32 N;

      dprintk("%s:\n", __FUNCTION__);
      switch (params->u.ofdm.bandwidth) {
      case BANDWIDTH_6_MHZ:
            if_freq = 4000000;
            break;
      case BANDWIDTH_7_MHZ:
            if_freq = 4500000;
            break;
      default:             /* 8 MHz or Auto */
            if_freq = 5000000;
            break;
      }
      tuner_freq = params->frequency + if_freq;

      i = 0;
      while (tda827x_dvbt[i].lomax < tuner_freq) {
            if(tda827x_dvbt[i + 1].lomax == 0)
                  break;
            i++;
      }

      N = ((tuner_freq + 125000) / 250000) << (tda827x_dvbt[i].spd + 2);
      buf[0] = 0;
      buf[1] = (N>>8) | 0x40;
      buf[2] = N & 0xff;
      buf[3] = 0;
      buf[4] = 0x52;
      buf[5] = (tda827x_dvbt[i].spd << 6) + (tda827x_dvbt[i].div1p5 << 5) +
                        (tda827x_dvbt[i].bs << 3) + tda827x_dvbt[i].bp;
      buf[6] = (tda827x_dvbt[i].gc3 << 4) + 0x8f;
      buf[7] = 0xbf;
      buf[8] = 0x2a;
      buf[9] = 0x05;
      buf[10] = 0xff;
      buf[11] = 0x00;
      buf[12] = 0x00;
      buf[13] = 0x40;

      msg.len = 14;
      if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 1);
      if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) {
            printk("%s: could not write to tuner at addr: 0x%02x\n",
                   __FUNCTION__, priv->i2c_addr << 1);
            return -EIO;
      }
      msleep(500);
      /* correct CP value */
      buf[0] = 0x30;
      buf[1] = 0x50 + tda827x_dvbt[i].cp;
      msg.len = 2;

      if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 1);
      i2c_transfer(priv->i2c_adap, &msg, 1);

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

      return 0;
}

static int tda827xo_sleep(struct dvb_frontend *fe)
{
      struct tda827x_priv *priv = fe->tuner_priv;
      static u8 buf[] = { 0x30, 0xd0 };
      struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
                         .buf = buf, .len = sizeof(buf) };

      dprintk("%s:\n", __FUNCTION__);
      if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 1);
      i2c_transfer(priv->i2c_adap, &msg, 1);

      if (priv->cfg && priv->cfg->sleep)
            priv->cfg->sleep(fe);

      return 0;
}

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

struct tda827xa_data {
      u32 lomax;
      u8  svco;
      u8  spd;
      u8  scr;
      u8  sbs;
      u8  gc3;
};

static const struct tda827xa_data tda827xa_dvbt[] = {
      { .lomax =  56875000, .svco = 3, .spd = 4, .scr = 0, .sbs = 0, .gc3 = 1},
      { .lomax =  67250000, .svco = 0, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 1},
      { .lomax =  81250000, .svco = 1, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 1},
      { .lomax =  97500000, .svco = 2, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 1},
      { .lomax = 113750000, .svco = 3, .spd = 3, .scr = 0, .sbs = 1, .gc3 = 1},
      { .lomax = 134500000, .svco = 0, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},
      { .lomax = 154000000, .svco = 1, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},
      { .lomax = 162500000, .svco = 1, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},
      { .lomax = 183000000, .svco = 2, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},
      { .lomax = 195000000, .svco = 2, .spd = 2, .scr = 0, .sbs = 2, .gc3 = 1},
      { .lomax = 227500000, .svco = 3, .spd = 2, .scr = 0, .sbs = 2, .gc3 = 1},
      { .lomax = 269000000, .svco = 0, .spd = 1, .scr = 0, .sbs = 2, .gc3 = 1},
      { .lomax = 290000000, .svco = 1, .spd = 1, .scr = 0, .sbs = 2, .gc3 = 1},
      { .lomax = 325000000, .svco = 1, .spd = 1, .scr = 0, .sbs = 3, .gc3 = 1},
      { .lomax = 390000000, .svco = 2, .spd = 1, .scr = 0, .sbs = 3, .gc3 = 1},
      { .lomax = 455000000, .svco = 3, .spd = 1, .scr = 0, .sbs = 3, .gc3 = 1},
      { .lomax = 520000000, .svco = 0, .spd = 0, .scr = 0, .sbs = 3, .gc3 = 1},
      { .lomax = 538000000, .svco = 0, .spd = 0, .scr = 1, .sbs = 3, .gc3 = 1},
      { .lomax = 550000000, .svco = 1, .spd = 0, .scr = 0, .sbs = 3, .gc3 = 1},
      { .lomax = 620000000, .svco = 1, .spd = 0, .scr = 0, .sbs = 4, .gc3 = 0},
      { .lomax = 650000000, .svco = 1, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 0},
      { .lomax = 700000000, .svco = 2, .spd = 0, .scr = 0, .sbs = 4, .gc3 = 0},
      { .lomax = 780000000, .svco = 2, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 0},
      { .lomax = 820000000, .svco = 3, .spd = 0, .scr = 0, .sbs = 4, .gc3 = 0},
      { .lomax = 870000000, .svco = 3, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 0},
      { .lomax = 911000000, .svco = 3, .spd = 0, .scr = 2, .sbs = 4, .gc3 = 0},
      { .lomax =         0, .svco = 0, .spd = 0, .scr = 0, .sbs = 0, .gc3 = 0}
};

static int tda827xa_set_params(struct dvb_frontend *fe,
                         struct dvb_frontend_parameters *params)
{
      struct tda827x_priv *priv = fe->tuner_priv;
      u8 buf[11];

      struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
                         .buf = buf, .len = sizeof(buf) };

      int i, tuner_freq, if_freq;
      u32 N;

      dprintk("%s:\n", __FUNCTION__);
      if (priv->cfg && priv->cfg->lna_gain)
            priv->cfg->lna_gain(fe, 1);
      msleep(20);

      switch (params->u.ofdm.bandwidth) {
      case BANDWIDTH_6_MHZ:
            if_freq = 4000000;
            break;
      case BANDWIDTH_7_MHZ:
            if_freq = 4500000;
            break;
      default:             /* 8 MHz or Auto */
            if_freq = 5000000;
            break;
      }
      tuner_freq = params->frequency + if_freq;

      i = 0;
      while (tda827xa_dvbt[i].lomax < tuner_freq) {
            if(tda827xa_dvbt[i + 1].lomax == 0)
                  break;
            i++;
      }

      N = ((tuner_freq + 31250) / 62500) << tda827xa_dvbt[i].spd;
      buf[0] = 0;            // subaddress
      buf[1] = N >> 8;
      buf[2] = N & 0xff;
      buf[3] = 0;
      buf[4] = 0x16;
      buf[5] = (tda827xa_dvbt[i].spd << 5) + (tda827xa_dvbt[i].svco << 3) +
                  tda827xa_dvbt[i].sbs;
      buf[6] = 0x4b + (tda827xa_dvbt[i].gc3 << 4);
      buf[7] = 0x1c;
      buf[8] = 0x06;
      buf[9] = 0x24;
      buf[10] = 0x00;
      msg.len = 11;
      if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 1);
      if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) {
            printk("%s: could not write to tuner at addr: 0x%02x\n",
                   __FUNCTION__, priv->i2c_addr << 1);
            return -EIO;
      }
      buf[0] = 0x90;
      buf[1] = 0xff;
      buf[2] = 0x60;
      buf[3] = 0x00;
      buf[4] = 0x59;  // lpsel, for 6MHz + 2
      msg.len = 5;
      if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 1);
      i2c_transfer(priv->i2c_adap, &msg, 1);

      buf[0] = 0xa0;
      buf[1] = 0x40;
      msg.len = 2;
      if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 1);
      i2c_transfer(priv->i2c_adap, &msg, 1);

      msleep(11);
      msg.flags = I2C_M_RD;
      if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 1);
      i2c_transfer(priv->i2c_adap, &msg, 1);
      msg.flags = 0;

      buf[1] >>= 4;
      dprintk("tda8275a AGC2 gain is: %d\n", buf[1]);
      if ((buf[1]) < 2) {
            if (priv->cfg && priv->cfg->lna_gain)
                  priv->cfg->lna_gain(fe, 0);
            buf[0] = 0x60;
            buf[1] = 0x0c;
            if (fe->ops.i2c_gate_ctrl)
                  fe->ops.i2c_gate_ctrl(fe, 1);
            i2c_transfer(priv->i2c_adap, &msg, 1);
      }

      buf[0] = 0xc0;
      buf[1] = 0x99;    // lpsel, for 6MHz + 2
      if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 1);
      i2c_transfer(priv->i2c_adap, &msg, 1);

      buf[0] = 0x60;
      buf[1] = 0x3c;
      if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 1);
      i2c_transfer(priv->i2c_adap, &msg, 1);

      /* correct CP value */
      buf[0] = 0x30;
      buf[1] = 0x10 + tda827xa_dvbt[i].scr;
      if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 1);
      i2c_transfer(priv->i2c_adap, &msg, 1);

      msleep(163);
      buf[0] = 0xc0;
      buf[1] = 0x39;  // lpsel, for 6MHz + 2
      if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 1);
      i2c_transfer(priv->i2c_adap, &msg, 1);

      msleep(3);
      /* freeze AGC1 */
      buf[0] = 0x50;
      buf[1] = 0x4f + (tda827xa_dvbt[i].gc3 << 4);
      if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 1);
      i2c_transfer(priv->i2c_adap, &msg, 1);

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

      return 0;
}

static int tda827xa_sleep(struct dvb_frontend *fe)
{
      struct tda827x_priv *priv = fe->tuner_priv;
      static u8 buf[] = { 0x30, 0x90 };
      struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
                         .buf = buf, .len = sizeof(buf) };

      dprintk("%s:\n", __FUNCTION__);
      if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 1);

      i2c_transfer(priv->i2c_adap, &msg, 1);

      if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 0);

      if (priv->cfg && priv->cfg->sleep)
            priv->cfg->sleep(fe);

      return 0;
}

static int tda827x_release(struct dvb_frontend *fe)
{
      kfree(fe->tuner_priv);
      fe->tuner_priv = NULL;
      return 0;
}

static int tda827x_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
      struct tda827x_priv *priv = fe->tuner_priv;
      *frequency = priv->frequency;
      return 0;
}

static int tda827x_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
{
      struct tda827x_priv *priv = fe->tuner_priv;
      *bandwidth = priv->bandwidth;
      return 0;
}

static int tda827x_init(struct dvb_frontend *fe)
{
      struct tda827x_priv *priv = fe->tuner_priv;
      dprintk("%s:\n", __FUNCTION__);
      if (priv->cfg && priv->cfg->init)
            priv->cfg->init(fe);

      return 0;
}

static int tda827x_probe_version(struct dvb_frontend *fe);

static int tda827x_initial_init(struct dvb_frontend *fe)
{
      int ret;
      ret = tda827x_probe_version(fe);
      if (ret)
            return ret;
      return fe->ops.tuner_ops.init(fe);
}

static int tda827x_initial_sleep(struct dvb_frontend *fe)
{
      int ret;
      ret = tda827x_probe_version(fe);
      if (ret)
            return ret;
      return fe->ops.tuner_ops.sleep(fe);
}

static struct dvb_tuner_ops tda827xo_tuner_ops = {
      .info = {
            .name = "Philips TDA827X",
            .frequency_min  =  55000000,
            .frequency_max  = 860000000,
            .frequency_step =    250000
      },
      .release = tda827x_release,
      .init = tda827x_initial_init,
      .sleep = tda827x_initial_sleep,
      .set_params = tda827xo_set_params,
      .get_frequency = tda827x_get_frequency,
      .get_bandwidth = tda827x_get_bandwidth,
};

static struct dvb_tuner_ops tda827xa_tuner_ops = {
      .info = {
            .name = "Philips TDA827XA",
            .frequency_min  =  44000000,
            .frequency_max  = 906000000,
            .frequency_step =     62500
      },
      .release = tda827x_release,
      .init = tda827x_init,
      .sleep = tda827xa_sleep,
      .set_params = tda827xa_set_params,
      .get_frequency = tda827x_get_frequency,
      .get_bandwidth = tda827x_get_bandwidth,
};

static int tda827x_probe_version(struct dvb_frontend *fe)
{     u8 data;
      struct tda827x_priv *priv = fe->tuner_priv;
      struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = I2C_M_RD,
                         .buf = &data, .len = 1 };
      if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 1);
      if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) {
            printk("%s: could not read from tuner at addr: 0x%02x\n",
                   __FUNCTION__, msg.addr << 1);
            return -EIO;
      }
      if ((data & 0x3c) == 0) {
            dprintk("tda827x tuner found\n");
            fe->ops.tuner_ops.init  = tda827x_init;
            fe->ops.tuner_ops.sleep = tda827xo_sleep;
      } else {
            dprintk("tda827xa tuner found\n");
            memcpy(&fe->ops.tuner_ops, &tda827xa_tuner_ops, sizeof(struct dvb_tuner_ops));
      }
      return 0;
}

struct dvb_frontend *tda827x_attach(struct dvb_frontend *fe, int addr,
                            struct i2c_adapter *i2c,
                            struct tda827x_config *cfg)
{
      struct tda827x_priv *priv = NULL;

      dprintk("%s:\n", __FUNCTION__);
      priv = kzalloc(sizeof(struct tda827x_priv), GFP_KERNEL);
      if (priv == NULL)
            return NULL;

      priv->i2c_addr = addr;
      priv->i2c_adap = i2c;
      priv->cfg = cfg;
      memcpy(&fe->ops.tuner_ops, &tda827xo_tuner_ops, sizeof(struct dvb_tuner_ops));

      fe->tuner_priv = priv;

      return fe;
}

EXPORT_SYMBOL(tda827x_attach);

module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");

MODULE_DESCRIPTION("DVB TDA827x driver");
MODULE_AUTHOR("Hartmut Hackmann <hartmut.hackmann@t-online.de>");
MODULE_AUTHOR("Michael Krufky <mkrufky@linuxtv.org>");
MODULE_LICENSE("GPL");

/*
 * Overrides for Emacs so that we follow Linus's tabbing style.
 * ---------------------------------------------------------------------------
 * Local variables:
 * c-basic-offset: 8
 * End:
 */

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