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dst.c

/*
      Frontend/Card driver for TwinHan DST Frontend
      Copyright (C) 2003 Jamie Honan
      Copyright (C) 2004, 2005 Manu Abraham (manu@kromtek.com)

      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/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <asm/div64.h>
#include "dvb_frontend.h"
#include "dst_priv.h"
#include "dst_common.h"

static unsigned int verbose = 1;
module_param(verbose, int, 0644);
MODULE_PARM_DESC(verbose, "verbose startup messages, default is 1 (yes)");

static unsigned int dst_addons;
module_param(dst_addons, int, 0644);
MODULE_PARM_DESC(dst_addons, "CA daughterboard, default is 0 (No addons)");

static unsigned int dst_algo;
module_param(dst_algo, int, 0644);
MODULE_PARM_DESC(dst_algo, "tuning algo: default is 0=(SW), 1=(HW)");

#define HAS_LOCK        1
#define ATTEMPT_TUNE          2
#define HAS_POWER       4

#define DST_ERROR       0
#define DST_NOTICE            1
#define DST_INFO        2
#define DST_DEBUG       3

#define dprintk(x, y, z, format, arg...) do {                     \
      if (z) {                                        \
            if    ((x > DST_ERROR) && (x > y))              \
                  printk(KERN_ERR "dst(%d) %s: " format "\n",     \
                        state->bt->nr, __func__ , ##arg);   \
            else if     ((x > DST_NOTICE) && (x > y))             \
                  printk(KERN_NOTICE "dst(%d) %s: " format "\n",  \
                        state->bt->nr, __func__ , ##arg);   \
            else if ((x > DST_INFO) && (x > y))             \
                  printk(KERN_INFO "dst(%d) %s: " format "\n",    \
                        state->bt->nr, __func__ , ##arg);   \
            else if ((x > DST_DEBUG) && (x > y))                  \
                  printk(KERN_DEBUG "dst(%d) %s: " format "\n",   \
                        state->bt->nr,  __func__ , ##arg);  \
      } else {                                        \
            if (x > y)                                \
                  printk(format, ##arg);                    \
      }                                               \
} while(0)


static void dst_packsize(struct dst_state *state, int psize)
{
      union dst_gpio_packet bits;

      bits.psize = psize;
      bt878_device_control(state->bt, DST_IG_TS, &bits);
}

int dst_gpio_outb(struct dst_state *state, u32 mask, u32 enbb, u32 outhigh, int delay)
{
      union dst_gpio_packet enb;
      union dst_gpio_packet bits;
      int err;

      enb.enb.mask = mask;
      enb.enb.enable = enbb;

      dprintk(verbose, DST_INFO, 1, "mask=[%04x], enbb=[%04x], outhigh=[%04x]", mask, enbb, outhigh);
      if ((err = bt878_device_control(state->bt, DST_IG_ENABLE, &enb)) < 0) {
            dprintk(verbose, DST_INFO, 1, "dst_gpio_enb error (err == %i, mask == %02x, enb == %02x)", err, mask, enbb);
            return -EREMOTEIO;
      }
      udelay(1000);
      /* because complete disabling means no output, no need to do output packet */
      if (enbb == 0)
            return 0;
      if (delay)
            msleep(10);
      bits.outp.mask = enbb;
      bits.outp.highvals = outhigh;
      if ((err = bt878_device_control(state->bt, DST_IG_WRITE, &bits)) < 0) {
            dprintk(verbose, DST_INFO, 1, "dst_gpio_outb error (err == %i, enbb == %02x, outhigh == %02x)", err, enbb, outhigh);
            return -EREMOTEIO;
      }

      return 0;
}
EXPORT_SYMBOL(dst_gpio_outb);

int dst_gpio_inb(struct dst_state *state, u8 *result)
{
      union dst_gpio_packet rd_packet;
      int err;

      *result = 0;
      if ((err = bt878_device_control(state->bt, DST_IG_READ, &rd_packet)) < 0) {
            dprintk(verbose, DST_ERROR, 1, "dst_gpio_inb error (err == %i)", err);
            return -EREMOTEIO;
      }
      *result = (u8) rd_packet.rd.value;

      return 0;
}
EXPORT_SYMBOL(dst_gpio_inb);

int rdc_reset_state(struct dst_state *state)
{
      dprintk(verbose, DST_INFO, 1, "Resetting state machine");
      if (dst_gpio_outb(state, RDC_8820_INT, RDC_8820_INT, 0, NO_DELAY) < 0) {
            dprintk(verbose, DST_ERROR, 1, "dst_gpio_outb ERROR !");
            return -1;
      }
      msleep(10);
      if (dst_gpio_outb(state, RDC_8820_INT, RDC_8820_INT, RDC_8820_INT, NO_DELAY) < 0) {
            dprintk(verbose, DST_ERROR, 1, "dst_gpio_outb ERROR !");
            msleep(10);
            return -1;
      }

      return 0;
}
EXPORT_SYMBOL(rdc_reset_state);

int rdc_8820_reset(struct dst_state *state)
{
      dprintk(verbose, DST_DEBUG, 1, "Resetting DST");
      if (dst_gpio_outb(state, RDC_8820_RESET, RDC_8820_RESET, 0, NO_DELAY) < 0) {
            dprintk(verbose, DST_ERROR, 1, "dst_gpio_outb ERROR !");
            return -1;
      }
      udelay(1000);
      if (dst_gpio_outb(state, RDC_8820_RESET, RDC_8820_RESET, RDC_8820_RESET, DELAY) < 0) {
            dprintk(verbose, DST_ERROR, 1, "dst_gpio_outb ERROR !");
            return -1;
      }

      return 0;
}
EXPORT_SYMBOL(rdc_8820_reset);

int dst_pio_enable(struct dst_state *state)
{
      if (dst_gpio_outb(state, ~0, RDC_8820_PIO_0_ENABLE, 0, NO_DELAY) < 0) {
            dprintk(verbose, DST_ERROR, 1, "dst_gpio_outb ERROR !");
            return -1;
      }
      udelay(1000);

      return 0;
}
EXPORT_SYMBOL(dst_pio_enable);

int dst_pio_disable(struct dst_state *state)
{
      if (dst_gpio_outb(state, ~0, RDC_8820_PIO_0_DISABLE, RDC_8820_PIO_0_DISABLE, NO_DELAY) < 0) {
            dprintk(verbose, DST_ERROR, 1, "dst_gpio_outb ERROR !");
            return -1;
      }
      if (state->type_flags & DST_TYPE_HAS_FW_1)
            udelay(1000);

      return 0;
}
EXPORT_SYMBOL(dst_pio_disable);

int dst_wait_dst_ready(struct dst_state *state, u8 delay_mode)
{
      u8 reply;
      int i;

      for (i = 0; i < 200; i++) {
            if (dst_gpio_inb(state, &reply) < 0) {
                  dprintk(verbose, DST_ERROR, 1, "dst_gpio_inb ERROR !");
                  return -1;
            }
            if ((reply & RDC_8820_PIO_0_ENABLE) == 0) {
                  dprintk(verbose, DST_INFO, 1, "dst wait ready after %d", i);
                  return 1;
            }
            msleep(10);
      }
      dprintk(verbose, DST_NOTICE, 1, "dst wait NOT ready after %d", i);

      return 0;
}
EXPORT_SYMBOL(dst_wait_dst_ready);

int dst_error_recovery(struct dst_state *state)
{
      dprintk(verbose, DST_NOTICE, 1, "Trying to return from previous errors.");
      dst_pio_disable(state);
      msleep(10);
      dst_pio_enable(state);
      msleep(10);

      return 0;
}
EXPORT_SYMBOL(dst_error_recovery);

int dst_error_bailout(struct dst_state *state)
{
      dprintk(verbose, DST_INFO, 1, "Trying to bailout from previous error.");
      rdc_8820_reset(state);
      dst_pio_disable(state);
      msleep(10);

      return 0;
}
EXPORT_SYMBOL(dst_error_bailout);

int dst_comm_init(struct dst_state *state)
{
      dprintk(verbose, DST_INFO, 1, "Initializing DST.");
      if ((dst_pio_enable(state)) < 0) {
            dprintk(verbose, DST_ERROR, 1, "PIO Enable Failed");
            return -1;
      }
      if ((rdc_reset_state(state)) < 0) {
            dprintk(verbose, DST_ERROR, 1, "RDC 8820 State RESET Failed.");
            return -1;
      }
      if (state->type_flags & DST_TYPE_HAS_FW_1)
            msleep(100);
      else
            msleep(5);

      return 0;
}
EXPORT_SYMBOL(dst_comm_init);

int write_dst(struct dst_state *state, u8 *data, u8 len)
{
      struct i2c_msg msg = {
            .addr = state->config->demod_address,
            .flags = 0,
            .buf = data,
            .len = len
      };

      int err;
      u8 cnt, i;

      dprintk(verbose, DST_NOTICE, 0, "writing [ ");
      for (i = 0; i < len; i++)
            dprintk(verbose, DST_NOTICE, 0, "%02x ", data[i]);
      dprintk(verbose, DST_NOTICE, 0, "]\n");

      for (cnt = 0; cnt < 2; cnt++) {
            if ((err = i2c_transfer(state->i2c, &msg, 1)) < 0) {
                  dprintk(verbose, DST_INFO, 1, "_write_dst error (err == %i, len == 0x%02x, b0 == 0x%02x)", err, len, data[0]);
                  dst_error_recovery(state);
                  continue;
            } else
                  break;
      }
      if (cnt >= 2) {
            dprintk(verbose, DST_INFO, 1, "RDC 8820 RESET");
            dst_error_bailout(state);

            return -1;
      }

      return 0;
}
EXPORT_SYMBOL(write_dst);

int read_dst(struct dst_state *state, u8 *ret, u8 len)
{
      struct i2c_msg msg = {
            .addr = state->config->demod_address,
            .flags = I2C_M_RD,
            .buf = ret,
            .len = len
      };

      int err;
      int cnt;

      for (cnt = 0; cnt < 2; cnt++) {
            if ((err = i2c_transfer(state->i2c, &msg, 1)) < 0) {
                  dprintk(verbose, DST_INFO, 1, "read_dst error (err == %i, len == 0x%02x, b0 == 0x%02x)", err, len, ret[0]);
                  dst_error_recovery(state);
                  continue;
            } else
                  break;
      }
      if (cnt >= 2) {
            dprintk(verbose, DST_INFO, 1, "RDC 8820 RESET");
            dst_error_bailout(state);

            return -1;
      }
      dprintk(verbose, DST_DEBUG, 1, "reply is 0x%x", ret[0]);
      for (err = 1; err < len; err++)
            dprintk(verbose, DST_DEBUG, 0, " 0x%x", ret[err]);
      if (err > 1)
            dprintk(verbose, DST_DEBUG, 0, "\n");

      return 0;
}
EXPORT_SYMBOL(read_dst);

static int dst_set_polarization(struct dst_state *state)
{
      switch (state->voltage) {
      case SEC_VOLTAGE_13:    /*    Vertical    */
            dprintk(verbose, DST_INFO, 1, "Polarization=[Vertical]");
            state->tx_tuna[8] &= ~0x40;
            break;
      case SEC_VOLTAGE_18:    /*    Horizontal  */
            dprintk(verbose, DST_INFO, 1, "Polarization=[Horizontal]");
            state->tx_tuna[8] |= 0x40;
            break;
      case SEC_VOLTAGE_OFF:
            break;
      }

      return 0;
}

static int dst_set_freq(struct dst_state *state, u32 freq)
{
      state->frequency = freq;
      dprintk(verbose, DST_INFO, 1, "set Frequency %u", freq);

      if (state->dst_type == DST_TYPE_IS_SAT) {
            freq = freq / 1000;
            if (freq < 950 || freq > 2150)
                  return -EINVAL;
            state->tx_tuna[2] = (freq >> 8);
            state->tx_tuna[3] = (u8) freq;
            state->tx_tuna[4] = 0x01;
            state->tx_tuna[8] &= ~0x04;
            if (state->type_flags & DST_TYPE_HAS_OBS_REGS) {
                  if (freq < 1531)
                        state->tx_tuna[8] |= 0x04;
            }
      } else if (state->dst_type == DST_TYPE_IS_TERR) {
            freq = freq / 1000;
            if (freq < 137000 || freq > 858000)
                  return -EINVAL;
            state->tx_tuna[2] = (freq >> 16) & 0xff;
            state->tx_tuna[3] = (freq >> 8) & 0xff;
            state->tx_tuna[4] = (u8) freq;
      } else if (state->dst_type == DST_TYPE_IS_CABLE) {
            freq = freq / 1000;
            state->tx_tuna[2] = (freq >> 16) & 0xff;
            state->tx_tuna[3] = (freq >> 8) & 0xff;
            state->tx_tuna[4] = (u8) freq;
      } else if (state->dst_type == DST_TYPE_IS_ATSC) {
            freq = freq / 1000;
            if (freq < 51000 || freq > 858000)
                  return -EINVAL;
            state->tx_tuna[2] = (freq >> 16) & 0xff;
            state->tx_tuna[3] = (freq >>  8) & 0xff;
            state->tx_tuna[4] = (u8) freq;
            state->tx_tuna[5] = 0x00;           /*    ATSC  */
            state->tx_tuna[6] = 0x00;
            if (state->dst_hw_cap & DST_TYPE_HAS_ANALOG)
                  state->tx_tuna[7] = 0x00;     /*    Digital     */
      } else
            return -EINVAL;

      return 0;
}

static int dst_set_bandwidth(struct dst_state *state, fe_bandwidth_t bandwidth)
{
      state->bandwidth = bandwidth;

      if (state->dst_type != DST_TYPE_IS_TERR)
            return -EOPNOTSUPP;

      switch (bandwidth) {
      case BANDWIDTH_6_MHZ:
            if (state->dst_hw_cap & DST_TYPE_HAS_CA)
                  state->tx_tuna[7] = 0x06;
            else {
                  state->tx_tuna[6] = 0x06;
                  state->tx_tuna[7] = 0x00;
            }
            break;
      case BANDWIDTH_7_MHZ:
            if (state->dst_hw_cap & DST_TYPE_HAS_CA)
                  state->tx_tuna[7] = 0x07;
            else {
                  state->tx_tuna[6] = 0x07;
                  state->tx_tuna[7] = 0x00;
            }
            break;
      case BANDWIDTH_8_MHZ:
            if (state->dst_hw_cap & DST_TYPE_HAS_CA)
                  state->tx_tuna[7] = 0x08;
            else {
                  state->tx_tuna[6] = 0x08;
                  state->tx_tuna[7] = 0x00;
            }
            break;
      default:
            return -EINVAL;
      }

      return 0;
}

static int dst_set_inversion(struct dst_state *state, fe_spectral_inversion_t inversion)
{
      state->inversion = inversion;
      switch (inversion) {
      case INVERSION_OFF:     /*    Inversion = Normal      */
            state->tx_tuna[8] &= ~0x80;
            break;
      case INVERSION_ON:
            state->tx_tuna[8] |= 0x80;
            break;
      default:
            return -EINVAL;
      }

      return 0;
}

static int dst_set_fec(struct dst_state *state, fe_code_rate_t fec)
{
      state->fec = fec;
      return 0;
}

static fe_code_rate_t dst_get_fec(struct dst_state *state)
{
      return state->fec;
}

static int dst_set_symbolrate(struct dst_state *state, u32 srate)
{
      u32 symcalc;
      u64 sval;

      state->symbol_rate = srate;
      if (state->dst_type == DST_TYPE_IS_TERR) {
            return -EOPNOTSUPP;
      }
      dprintk(verbose, DST_INFO, 1, "set symrate %u", srate);
      srate /= 1000;
      if (state->dst_type == DST_TYPE_IS_SAT) {
            if (state->type_flags & DST_TYPE_HAS_SYMDIV) {
                  sval = srate;
                  sval <<= 20;
                  do_div(sval, 88000);
                  symcalc = (u32) sval;
                  dprintk(verbose, DST_INFO, 1, "set symcalc %u", symcalc);
                  state->tx_tuna[5] = (u8) (symcalc >> 12);
                  state->tx_tuna[6] = (u8) (symcalc >> 4);
                  state->tx_tuna[7] = (u8) (symcalc << 4);
            } else {
                  state->tx_tuna[5] = (u8) (srate >> 16) & 0x7f;
                  state->tx_tuna[6] = (u8) (srate >> 8);
                  state->tx_tuna[7] = (u8) srate;
            }
            state->tx_tuna[8] &= ~0x20;
            if (state->type_flags & DST_TYPE_HAS_OBS_REGS) {
                  if (srate > 8000)
                        state->tx_tuna[8] |= 0x20;
            }
      } else if (state->dst_type == DST_TYPE_IS_CABLE) {
            dprintk(verbose, DST_DEBUG, 1, "%s", state->fw_name);
            if (!strncmp(state->fw_name, "DCTNEW", 6)) {
                  state->tx_tuna[5] = (u8) (srate >> 8);
                  state->tx_tuna[6] = (u8) srate;
                  state->tx_tuna[7] = 0x00;
            } else if (!strncmp(state->fw_name, "DCT-CI", 6)) {
                  state->tx_tuna[5] = 0x00;
                  state->tx_tuna[6] = (u8) (srate >> 8);
                  state->tx_tuna[7] = (u8) srate;
            }
      }
      return 0;
}

static int dst_set_modulation(struct dst_state *state, fe_modulation_t modulation)
{
      if (state->dst_type != DST_TYPE_IS_CABLE)
            return -EOPNOTSUPP;

      state->modulation = modulation;
      switch (modulation) {
      case QAM_16:
            state->tx_tuna[8] = 0x10;
            break;
      case QAM_32:
            state->tx_tuna[8] = 0x20;
            break;
      case QAM_64:
            state->tx_tuna[8] = 0x40;
            break;
      case QAM_128:
            state->tx_tuna[8] = 0x80;
            break;
      case QAM_256:
            if (!strncmp(state->fw_name, "DCTNEW", 6))
                  state->tx_tuna[8] = 0xff;
            else if (!strncmp(state->fw_name, "DCT-CI", 6))
                  state->tx_tuna[8] = 0x00;
            break;
      case QPSK:
      case QAM_AUTO:
      case VSB_8:
      case VSB_16:
      default:
            return -EINVAL;

      }

      return 0;
}

static fe_modulation_t dst_get_modulation(struct dst_state *state)
{
      return state->modulation;
}


u8 dst_check_sum(u8 *buf, u32 len)
{
      u32 i;
      u8 val = 0;
      if (!len)
            return 0;
      for (i = 0; i < len; i++) {
            val += buf[i];
      }
      return ((~val) + 1);
}
EXPORT_SYMBOL(dst_check_sum);

static void dst_type_flags_print(struct dst_state *state)
{
      u32 type_flags = state->type_flags;

      dprintk(verbose, DST_ERROR, 0, "DST type flags :");
      if (type_flags & DST_TYPE_HAS_TS188)
            dprintk(verbose, DST_ERROR, 0, " 0x%x newtuner", DST_TYPE_HAS_TS188);
      if (type_flags & DST_TYPE_HAS_NEWTUNE_2)
            dprintk(verbose, DST_ERROR, 0, " 0x%x newtuner 2", DST_TYPE_HAS_NEWTUNE_2);
      if (type_flags & DST_TYPE_HAS_TS204)
            dprintk(verbose, DST_ERROR, 0, " 0x%x ts204", DST_TYPE_HAS_TS204);
      if (type_flags & DST_TYPE_HAS_VLF)
            dprintk(verbose, DST_ERROR, 0, " 0x%x VLF", DST_TYPE_HAS_VLF);
      if (type_flags & DST_TYPE_HAS_SYMDIV)
            dprintk(verbose, DST_ERROR, 0, " 0x%x symdiv", DST_TYPE_HAS_SYMDIV);
      if (type_flags & DST_TYPE_HAS_FW_1)
            dprintk(verbose, DST_ERROR, 0, " 0x%x firmware version = 1", DST_TYPE_HAS_FW_1);
      if (type_flags & DST_TYPE_HAS_FW_2)
            dprintk(verbose, DST_ERROR, 0, " 0x%x firmware version = 2", DST_TYPE_HAS_FW_2);
      if (type_flags & DST_TYPE_HAS_FW_3)
            dprintk(verbose, DST_ERROR, 0, " 0x%x firmware version = 3", DST_TYPE_HAS_FW_3);
      dprintk(verbose, DST_ERROR, 0, "\n");
}


static int dst_type_print(struct dst_state *state, u8 type)
{
      char *otype;
      switch (type) {
      case DST_TYPE_IS_SAT:
            otype = "satellite";
            break;

      case DST_TYPE_IS_TERR:
            otype = "terrestrial";
            break;

      case DST_TYPE_IS_CABLE:
            otype = "cable";
            break;

      case DST_TYPE_IS_ATSC:
            otype = "atsc";
            break;

      default:
            dprintk(verbose, DST_INFO, 1, "invalid dst type %d", type);
            return -EINVAL;
      }
      dprintk(verbose, DST_INFO, 1, "DST type: %s", otype);

      return 0;
}

struct tuner_types tuner_list[] = {
      {
            .tuner_type = TUNER_TYPE_L64724,
            .tuner_name = "L 64724",
            .board_name = "UNKNOWN",
            .fw_name    = "UNKNOWN"
      },

      {
            .tuner_type = TUNER_TYPE_STV0299,
            .tuner_name = "STV 0299",
            .board_name = "VP1020",
            .fw_name    = "DST-MOT"
      },

      {
            .tuner_type = TUNER_TYPE_STV0299,
            .tuner_name = "STV 0299",
            .board_name = "VP1020",
            .fw_name    = "DST-03T"
      },

      {
            .tuner_type = TUNER_TYPE_MB86A15,
            .tuner_name = "MB 86A15",
            .board_name = "VP1022",
            .fw_name    = "DST-03T"
      },

      {
            .tuner_type = TUNER_TYPE_MB86A15,
            .tuner_name = "MB 86A15",
            .board_name = "VP1025",
            .fw_name    = "DST-03T"
      },

      {
            .tuner_type = TUNER_TYPE_STV0299,
            .tuner_name = "STV 0299",
            .board_name = "VP1030",
            .fw_name    = "DST-CI"
      },

      {
            .tuner_type = TUNER_TYPE_STV0299,
            .tuner_name = "STV 0299",
            .board_name = "VP1030",
            .fw_name    = "DSTMCI"
      },

      {
            .tuner_type = TUNER_TYPE_UNKNOWN,
            .tuner_name = "UNKNOWN",
            .board_name = "VP2021",
            .fw_name    = "DCTNEW"
      },

      {
            .tuner_type = TUNER_TYPE_UNKNOWN,
            .tuner_name = "UNKNOWN",
            .board_name = "VP2030",
            .fw_name    = "DCT-CI"
      },

      {
            .tuner_type = TUNER_TYPE_UNKNOWN,
            .tuner_name = "UNKNOWN",
            .board_name = "VP2031",
            .fw_name    = "DCT-CI"
      },

      {
            .tuner_type = TUNER_TYPE_UNKNOWN,
            .tuner_name = "UNKNOWN",
            .board_name = "VP2040",
            .fw_name    = "DCT-CI"
      },

      {
            .tuner_type = TUNER_TYPE_UNKNOWN,
            .tuner_name = "UNKNOWN",
            .board_name = "VP3020",
            .fw_name    = "DTTFTA"
      },

      {
            .tuner_type = TUNER_TYPE_UNKNOWN,
            .tuner_name = "UNKNOWN",
            .board_name = "VP3021",
            .fw_name    = "DTTFTA"
      },

      {
            .tuner_type = TUNER_TYPE_TDA10046,
            .tuner_name = "TDA10046",
            .board_name = "VP3040",
            .fw_name    = "DTT-CI"
      },

      {
            .tuner_type = TUNER_TYPE_UNKNOWN,
            .tuner_name = "UNKNOWN",
            .board_name = "VP3051",
            .fw_name    = "DTTNXT"
      },

      {
            .tuner_type = TUNER_TYPE_NXT200x,
            .tuner_name = "NXT200x",
            .board_name = "VP3220",
            .fw_name    = "ATSCDI"
      },

      {
            .tuner_type = TUNER_TYPE_NXT200x,
            .tuner_name = "NXT200x",
            .board_name = "VP3250",
            .fw_name    = "ATSCAD"
      },
};

/*
      Known cards list
      Satellite
      -------------------
              200103A
      VP-1020   DST-MOT LG(old), TS=188

      VP-1020   DST-03T LG(new), TS=204
      VP-1022   DST-03T LG(new), TS=204
      VP-1025   DST-03T LG(new), TS=204

      VP-1030   DSTMCI, LG(new), TS=188
      VP-1032   DSTMCI, LG(new), TS=188

      Cable
      -------------------
      VP-2030   DCT-CI, Samsung, TS=204
      VP-2021   DCT-CI, Unknown, TS=204
      VP-2031   DCT-CI, Philips, TS=188
      VP-2040   DCT-CI, Philips, TS=188, with CA daughter board
      VP-2040   DCT-CI, Philips, TS=204, without CA daughter board

      Terrestrial
      -------------------
      VP-3050  DTTNXT                TS=188
      VP-3040  DTT-CI,  Philips, TS=188
      VP-3040  DTT-CI,  Philips, TS=204

      ATSC
      -------------------
      VP-3220  ATSCDI,         TS=188
      VP-3250  ATSCAD,         TS=188

*/

static struct dst_types dst_tlist[] = {
      {
            .device_id = "200103A",
            .offset = 0,
            .dst_type =  DST_TYPE_IS_SAT,
            .type_flags = DST_TYPE_HAS_SYMDIV | DST_TYPE_HAS_FW_1 | DST_TYPE_HAS_OBS_REGS,
            .dst_feature = 0,
            .tuner_type = 0
      },    /*    obsolete    */

      {
            .device_id = "DST-020",
            .offset = 0,
            .dst_type =  DST_TYPE_IS_SAT,
            .type_flags = DST_TYPE_HAS_SYMDIV | DST_TYPE_HAS_FW_1,
            .dst_feature = 0,
            .tuner_type = 0
      },    /*    obsolete    */

      {
            .device_id = "DST-030",
            .offset =  0,
            .dst_type = DST_TYPE_IS_SAT,
            .type_flags = DST_TYPE_HAS_TS204 | DST_TYPE_HAS_TS188 | DST_TYPE_HAS_FW_1,
            .dst_feature = 0,
            .tuner_type = 0
      },    /*    obsolete    */

      {
            .device_id = "DST-03T",
            .offset = 0,
            .dst_type = DST_TYPE_IS_SAT,
            .type_flags = DST_TYPE_HAS_SYMDIV | DST_TYPE_HAS_TS204 | DST_TYPE_HAS_FW_2,
            .dst_feature = DST_TYPE_HAS_DISEQC3 | DST_TYPE_HAS_DISEQC4 | DST_TYPE_HAS_DISEQC5
                                           | DST_TYPE_HAS_MAC | DST_TYPE_HAS_MOTO,
            .tuner_type = TUNER_TYPE_MULTI
       },

      {
            .device_id = "DST-MOT",
            .offset =  0,
            .dst_type = DST_TYPE_IS_SAT,
            .type_flags = DST_TYPE_HAS_SYMDIV | DST_TYPE_HAS_FW_1,
            .dst_feature = 0,
            .tuner_type = 0
      },    /*    obsolete    */

      {
            .device_id = "DST-CI",
            .offset = 1,
            .dst_type = DST_TYPE_IS_SAT,
            .type_flags = DST_TYPE_HAS_TS204 | DST_TYPE_HAS_FW_1,
            .dst_feature = DST_TYPE_HAS_CA,
            .tuner_type = 0
      },    /*    An OEM board      */

      {
            .device_id = "DSTMCI",
            .offset = 1,
            .dst_type = DST_TYPE_IS_SAT,
            .type_flags = DST_TYPE_HAS_TS188 | DST_TYPE_HAS_FW_2 | DST_TYPE_HAS_FW_BUILD | DST_TYPE_HAS_INC_COUNT | DST_TYPE_HAS_VLF,
            .dst_feature = DST_TYPE_HAS_CA | DST_TYPE_HAS_DISEQC3 | DST_TYPE_HAS_DISEQC4
                                          | DST_TYPE_HAS_MOTO | DST_TYPE_HAS_MAC,
            .tuner_type = TUNER_TYPE_MULTI
      },

      {
            .device_id = "DSTFCI",
            .offset = 1,
            .dst_type = DST_TYPE_IS_SAT,
            .type_flags = DST_TYPE_HAS_TS188 | DST_TYPE_HAS_FW_1,
            .dst_feature = 0,
            .tuner_type = 0
      },    /* unknown to vendor    */

      {
            .device_id = "DCT-CI",
            .offset = 1,
            .dst_type = DST_TYPE_IS_CABLE,
            .type_flags = DST_TYPE_HAS_MULTI_FE | DST_TYPE_HAS_FW_1     | DST_TYPE_HAS_FW_2 | DST_TYPE_HAS_VLF,
            .dst_feature = DST_TYPE_HAS_CA,
            .tuner_type = 0
      },

      {
            .device_id = "DCTNEW",
            .offset = 1,
            .dst_type = DST_TYPE_IS_CABLE,
            .type_flags = DST_TYPE_HAS_TS188 | DST_TYPE_HAS_FW_3 | DST_TYPE_HAS_FW_BUILD | DST_TYPE_HAS_MULTI_FE,
            .dst_feature = 0,
            .tuner_type = 0
      },

      {
            .device_id = "DTT-CI",
            .offset = 1,
            .dst_type = DST_TYPE_IS_TERR,
            .type_flags = DST_TYPE_HAS_FW_2 | DST_TYPE_HAS_MULTI_FE | DST_TYPE_HAS_VLF,
            .dst_feature = DST_TYPE_HAS_CA,
            .tuner_type = 0
      },

      {
            .device_id = "DTTDIG",
            .offset = 1,
            .dst_type = DST_TYPE_IS_TERR,
            .type_flags = DST_TYPE_HAS_FW_2,
            .dst_feature = 0,
            .tuner_type = 0
      },

      {
            .device_id = "DTTNXT",
            .offset = 1,
            .dst_type = DST_TYPE_IS_TERR,
            .type_flags = DST_TYPE_HAS_FW_2,
            .dst_feature = DST_TYPE_HAS_ANALOG,
            .tuner_type = 0
      },

      {
            .device_id = "ATSCDI",
            .offset = 1,
            .dst_type = DST_TYPE_IS_ATSC,
            .type_flags = DST_TYPE_HAS_FW_2,
            .dst_feature = 0,
            .tuner_type = 0
      },

      {
            .device_id = "ATSCAD",
            .offset = 1,
            .dst_type = DST_TYPE_IS_ATSC,
            .type_flags = DST_TYPE_HAS_MULTI_FE | DST_TYPE_HAS_FW_2 | DST_TYPE_HAS_FW_BUILD,
            .dst_feature = DST_TYPE_HAS_MAC | DST_TYPE_HAS_ANALOG,
            .tuner_type = 0
      },

      { }

};

static int dst_get_mac(struct dst_state *state)
{
      u8 get_mac[] = { 0x00, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
      get_mac[7] = dst_check_sum(get_mac, 7);
      if (dst_command(state, get_mac, 8) < 0) {
            dprintk(verbose, DST_INFO, 1, "Unsupported Command");
            return -1;
      }
      memset(&state->mac_address, '\0', 8);
      memcpy(&state->mac_address, &state->rxbuffer, 6);
      dprintk(verbose, DST_ERROR, 1, "MAC Address=[%02x:%02x:%02x:%02x:%02x:%02x]",
            state->mac_address[0], state->mac_address[1], state->mac_address[2],
            state->mac_address[4], state->mac_address[5], state->mac_address[6]);

      return 0;
}

static int dst_fw_ver(struct dst_state *state)
{
      u8 get_ver[] = { 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
      get_ver[7] = dst_check_sum(get_ver, 7);
      if (dst_command(state, get_ver, 8) < 0) {
            dprintk(verbose, DST_INFO, 1, "Unsupported Command");
            return -1;
      }
      memset(&state->fw_version, '\0', 8);
      memcpy(&state->fw_version, &state->rxbuffer, 8);
      dprintk(verbose, DST_ERROR, 1, "Firmware Ver = %x.%x Build = %02x, on %x:%x, %x-%x-20%02x",
            state->fw_version[0] >> 4, state->fw_version[0] & 0x0f,
            state->fw_version[1],
            state->fw_version[5], state->fw_version[6],
            state->fw_version[4], state->fw_version[3], state->fw_version[2]);

      return 0;
}

static int dst_card_type(struct dst_state *state)
{
      int j;
      struct tuner_types *p_tuner_list = NULL;

      u8 get_type[] = { 0x00, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
      get_type[7] = dst_check_sum(get_type, 7);
      if (dst_command(state, get_type, 8) < 0) {
            dprintk(verbose, DST_INFO, 1, "Unsupported Command");
            return -1;
      }
      memset(&state->card_info, '\0', 8);
      memcpy(&state->card_info, &state->rxbuffer, 7);
      dprintk(verbose, DST_ERROR, 1, "Device Model=[%s]", &state->card_info[0]);

      for (j = 0, p_tuner_list = tuner_list; j < ARRAY_SIZE(tuner_list); j++, p_tuner_list++) {
            if (!strcmp(&state->card_info[0], p_tuner_list->board_name)) {
                  state->tuner_type = p_tuner_list->tuner_type;
                  dprintk(verbose, DST_ERROR, 1, "DST has [%s] tuner, tuner type=[%d]",
                        p_tuner_list->tuner_name, p_tuner_list->tuner_type);
            }
      }

      return 0;
}

static int dst_get_vendor(struct dst_state *state)
{
      u8 get_vendor[] = { 0x00, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
      get_vendor[7] = dst_check_sum(get_vendor, 7);
      if (dst_command(state, get_vendor, 8) < 0) {
            dprintk(verbose, DST_INFO, 1, "Unsupported Command");
            return -1;
      }
      memset(&state->vendor, '\0', 8);
      memcpy(&state->vendor, &state->rxbuffer, 7);
      dprintk(verbose, DST_ERROR, 1, "Vendor=[%s]", &state->vendor[0]);

      return 0;
}

static void debug_dst_buffer(struct dst_state *state)
{
      int i;

      if (verbose > 2) {
            printk("%s: [", __func__);
            for (i = 0; i < 8; i++)
                  printk(" %02x", state->rxbuffer[i]);
            printk("]\n");
      }
}

static int dst_check_stv0299(struct dst_state *state)
{
      u8 check_stv0299[] = { 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };

      check_stv0299[7] = dst_check_sum(check_stv0299, 7);
      if (dst_command(state, check_stv0299, 8) < 0) {
            dprintk(verbose, DST_ERROR, 1, "Cmd=[0x04] failed");
            return -1;
      }
      debug_dst_buffer(state);

      if (memcmp(&check_stv0299, &state->rxbuffer, 8)) {
            dprintk(verbose, DST_ERROR, 1, "Found a STV0299 NIM");
            state->tuner_type = TUNER_TYPE_STV0299;
            return 0;
      }

      return -1;
}

static int dst_check_mb86a15(struct dst_state *state)
{
      u8 check_mb86a15[] = { 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };

      check_mb86a15[7] = dst_check_sum(check_mb86a15, 7);
      if (dst_command(state, check_mb86a15, 8) < 0) {
            dprintk(verbose, DST_ERROR, 1, "Cmd=[0x10], failed");
            return -1;
      }
      debug_dst_buffer(state);

      if (memcmp(&check_mb86a15, &state->rxbuffer, 8) < 0) {
            dprintk(verbose, DST_ERROR, 1, "Found a MB86A15 NIM");
            state->tuner_type = TUNER_TYPE_MB86A15;
            return 0;
      }

      return -1;
}

static int dst_get_tuner_info(struct dst_state *state)
{
      u8 get_tuner_1[] = { 0x00, 0x13, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
      u8 get_tuner_2[] = { 0x00, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };

      get_tuner_1[7] = dst_check_sum(get_tuner_1, 7);
      get_tuner_2[7] = dst_check_sum(get_tuner_2, 7);
      dprintk(verbose, DST_ERROR, 1, "DST TYpe = MULTI FE");
      if (state->type_flags & DST_TYPE_HAS_MULTI_FE) {
            if (dst_command(state, get_tuner_1, 8) < 0) {
                  dprintk(verbose, DST_INFO, 1, "Cmd=[0x13], Unsupported");
                  goto force;
            }
      } else {
            if (dst_command(state, get_tuner_2, 8) < 0) {
                  dprintk(verbose, DST_INFO, 1, "Cmd=[0xb], Unsupported");
                  goto force;
            }
      }
      memset(&state->board_info, '\0', 8);
      memcpy(&state->board_info, &state->rxbuffer, 8);
      if (state->type_flags & DST_TYPE_HAS_MULTI_FE) {
            dprintk(verbose, DST_ERROR, 1, "DST type has TS=188");
      }
      if (state->board_info[0] == 0xbc) {
            if (state->type_flags != DST_TYPE_IS_ATSC)
                  state->type_flags |= DST_TYPE_HAS_TS188;
            else
                  state->type_flags |= DST_TYPE_HAS_NEWTUNE_2;

            if (state->board_info[1] == 0x01) {
                  state->dst_hw_cap |= DST_TYPE_HAS_DBOARD;
                  dprintk(verbose, DST_ERROR, 1, "DST has Daughterboard");
            }
      }

      return 0;
force:
      if (!strncmp(state->fw_name, "DCT-CI", 6)) {
            state->type_flags |= DST_TYPE_HAS_TS204;
            dprintk(verbose, DST_ERROR, 1, "Forcing [%s] to TS188", state->fw_name);
      }

      return -1;
}

static int dst_get_device_id(struct dst_state *state)
{
      u8 reply;

      int i, j;
      struct dst_types *p_dst_type = NULL;
      struct tuner_types *p_tuner_list = NULL;

      u8 use_dst_type = 0;
      u32 use_type_flags = 0;

      static u8 device_type[8] = {0x00, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff};

      state->tuner_type = 0;
      device_type[7] = dst_check_sum(device_type, 7);

      if (write_dst(state, device_type, FIXED_COMM))
            return -1;        /*    Write failed            */
      if ((dst_pio_disable(state)) < 0)
            return -1;
      if (read_dst(state, &reply, GET_ACK))
            return -1;        /*    Read failure            */
      if (reply != ACK) {
            dprintk(verbose, DST_INFO, 1, "Write not Acknowledged! [Reply=0x%02x]", reply);
            return -1;        /*    Unack'd write           */
      }
      if (!dst_wait_dst_ready(state, DEVICE_INIT))
            return -1;        /*    DST not ready yet */
      if (read_dst(state, state->rxbuffer, FIXED_COMM))
            return -1;

      dst_pio_disable(state);
      if (state->rxbuffer[7] != dst_check_sum(state->rxbuffer, 7)) {
            dprintk(verbose, DST_INFO, 1, "Checksum failure!");
            return -1;        /*    Checksum failure  */
      }
      state->rxbuffer[7] = '\0';

      for (i = 0, p_dst_type = dst_tlist; i < ARRAY_SIZE(dst_tlist); i++, p_dst_type++) {
            if (!strncmp (&state->rxbuffer[p_dst_type->offset], p_dst_type->device_id, strlen (p_dst_type->device_id))) {
                  use_type_flags = p_dst_type->type_flags;
                  use_dst_type = p_dst_type->dst_type;

                  /*    Card capabilities */
                  state->dst_hw_cap = p_dst_type->dst_feature;
                  dprintk(verbose, DST_ERROR, 1, "Recognise [%s]", p_dst_type->device_id);
                  strncpy(&state->fw_name[0], p_dst_type->device_id, 6);
                  /*    Multiple tuners         */
                  if (p_dst_type->tuner_type & TUNER_TYPE_MULTI) {
                        switch (use_dst_type) {
                        case DST_TYPE_IS_SAT:
                              /*    STV0299 check     */
                              if (dst_check_stv0299(state) < 0) {
                                    dprintk(verbose, DST_ERROR, 1, "Unsupported");
                                    state->tuner_type = TUNER_TYPE_MB86A15;
                              }
                              break;
                        default:
                              break;
                        }
                        if (dst_check_mb86a15(state) < 0)
                              dprintk(verbose, DST_ERROR, 1, "Unsupported");
                  /*    Single tuner            */
                  } else {
                        state->tuner_type = p_dst_type->tuner_type;
                  }
                  for (j = 0, p_tuner_list = tuner_list; j < ARRAY_SIZE(tuner_list); j++, p_tuner_list++) {
                        if (!(strncmp(p_dst_type->device_id, p_tuner_list->fw_name, 7)) &&
                              p_tuner_list->tuner_type == state->tuner_type) {
                              dprintk(verbose, DST_ERROR, 1, "[%s] has a [%s]",
                                    p_dst_type->device_id, p_tuner_list->tuner_name);
                        }
                  }
                  break;
            }
      }

      if (i >= ARRAY_SIZE(dst_tlist)) {
            dprintk(verbose, DST_ERROR, 1, "Unable to recognize %s or %s", &state->rxbuffer[0], &state->rxbuffer[1]);
            dprintk(verbose, DST_ERROR, 1, "please email linux-dvb@linuxtv.org with this type in");
            use_dst_type = DST_TYPE_IS_SAT;
            use_type_flags = DST_TYPE_HAS_SYMDIV;
      }
      dst_type_print(state, use_dst_type);
      state->type_flags = use_type_flags;
      state->dst_type = use_dst_type;
      dst_type_flags_print(state);

      return 0;
}

static int dst_probe(struct dst_state *state)
{
      mutex_init(&state->dst_mutex);
      if (dst_addons & DST_TYPE_HAS_CA) {
            if ((rdc_8820_reset(state)) < 0) {
                  dprintk(verbose, DST_ERROR, 1, "RDC 8820 RESET Failed.");
                  return -1;
            }
            msleep(4000);
      } else {
            msleep(100);
      }
      if ((dst_comm_init(state)) < 0) {
            dprintk(verbose, DST_ERROR, 1, "DST Initialization Failed.");
            return -1;
      }
      msleep(100);
      if (dst_get_device_id(state) < 0) {
            dprintk(verbose, DST_ERROR, 1, "unknown device.");
            return -1;
      }
      if (dst_get_mac(state) < 0) {
            dprintk(verbose, DST_INFO, 1, "MAC: Unsupported command");
      }
      if ((state->type_flags & DST_TYPE_HAS_MULTI_FE) || (state->type_flags & DST_TYPE_HAS_FW_BUILD)) {
            if (dst_get_tuner_info(state) < 0)
                  dprintk(verbose, DST_INFO, 1, "Tuner: Unsupported command");
      }
      if (state->type_flags & DST_TYPE_HAS_TS204) {
            dst_packsize(state, 204);
      }
      if (state->type_flags & DST_TYPE_HAS_FW_BUILD) {
            if (dst_fw_ver(state) < 0) {
                  dprintk(verbose, DST_INFO, 1, "FW: Unsupported command");
                  return 0;
            }
            if (dst_card_type(state) < 0) {
                  dprintk(verbose, DST_INFO, 1, "Card: Unsupported command");
                  return 0;
            }
            if (dst_get_vendor(state) < 0) {
                  dprintk(verbose, DST_INFO, 1, "Vendor: Unsupported command");
                  return 0;
            }
      }

      return 0;
}

int dst_command(struct dst_state *state, u8 *data, u8 len)
{
      u8 reply;

      mutex_lock(&state->dst_mutex);
      if ((dst_comm_init(state)) < 0) {
            dprintk(verbose, DST_NOTICE, 1, "DST Communication Initialization Failed.");
            goto error;
      }
      if (write_dst(state, data, len)) {
            dprintk(verbose, DST_INFO, 1, "Trying to recover.. ");
            if ((dst_error_recovery(state)) < 0) {
                  dprintk(verbose, DST_ERROR, 1, "Recovery Failed.");
                  goto error;
            }
            goto error;
      }
      if ((dst_pio_disable(state)) < 0) {
            dprintk(verbose, DST_ERROR, 1, "PIO Disable Failed.");
            goto error;
      }
      if (state->type_flags & DST_TYPE_HAS_FW_1)
            udelay(3000);
      if (read_dst(state, &reply, GET_ACK)) {
            dprintk(verbose, DST_DEBUG, 1, "Trying to recover.. ");
            if ((dst_error_recovery(state)) < 0) {
                  dprintk(verbose, DST_INFO, 1, "Recovery Failed.");
                  goto error;
            }
            goto error;
      }
      if (reply != ACK) {
            dprintk(verbose, DST_INFO, 1, "write not acknowledged 0x%02x ", reply);
            goto error;
      }
      if (len >= 2 && data[0] == 0 && (data[1] == 1 || data[1] == 3))
            goto error;
      if (state->type_flags & DST_TYPE_HAS_FW_1)
            udelay(3000);
      else
            udelay(2000);
      if (!dst_wait_dst_ready(state, NO_DELAY))
            goto error;
      if (read_dst(state, state->rxbuffer, FIXED_COMM)) {
            dprintk(verbose, DST_DEBUG, 1, "Trying to recover.. ");
            if ((dst_error_recovery(state)) < 0) {
                  dprintk(verbose, DST_INFO, 1, "Recovery failed.");
                  goto error;
            }
            goto error;
      }
      if (state->rxbuffer[7] != dst_check_sum(state->rxbuffer, 7)) {
            dprintk(verbose, DST_INFO, 1, "checksum failure");
            goto error;
      }
      mutex_unlock(&state->dst_mutex);
      return 0;

error:
      mutex_unlock(&state->dst_mutex);
      return -EIO;

}
EXPORT_SYMBOL(dst_command);

static int dst_get_signal(struct dst_state *state)
{
      int retval;
      u8 get_signal[] = { 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfb };
      //dprintk("%s: Getting Signal strength and other parameters\n", __FUNCTION__);
      if ((state->diseq_flags & ATTEMPT_TUNE) == 0) {
            state->decode_lock = state->decode_strength = state->decode_snr = 0;
            return 0;
      }
      if (0 == (state->diseq_flags & HAS_LOCK)) {
            state->decode_lock = state->decode_strength = state->decode_snr = 0;
            return 0;
      }
      if (time_after_eq(jiffies, state->cur_jiff + (HZ / 5))) {
            retval = dst_command(state, get_signal, 8);
            if (retval < 0)
                  return retval;
            if (state->dst_type == DST_TYPE_IS_SAT) {
                  state->decode_lock = ((state->rxbuffer[6] & 0x10) == 0) ? 1 : 0;
                  state->decode_strength = state->rxbuffer[5] << 8;
                  state->decode_snr = state->rxbuffer[2] << 8 | state->rxbuffer[3];
            } else if ((state->dst_type == DST_TYPE_IS_TERR) || (state->dst_type == DST_TYPE_IS_CABLE)) {
                  state->decode_lock = (state->rxbuffer[1]) ? 1 : 0;
                  state->decode_strength = state->rxbuffer[4] << 8;
                  state->decode_snr = state->rxbuffer[3] << 8;
            } else if (state->dst_type == DST_TYPE_IS_ATSC) {
                  state->decode_lock = (state->rxbuffer[6] == 0x00) ? 1 : 0;
                  state->decode_strength = state->rxbuffer[4] << 8;
                  state->decode_snr = state->rxbuffer[2] << 8 | state->rxbuffer[3];
            }
            state->cur_jiff = jiffies;
      }
      return 0;
}

static int dst_tone_power_cmd(struct dst_state *state)
{
      u8 paket[8] = { 0x00, 0x09, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00 };

      if (state->dst_type != DST_TYPE_IS_SAT)
            return -EOPNOTSUPP;
      paket[4] = state->tx_tuna[4];
      paket[2] = state->tx_tuna[2];
      paket[3] = state->tx_tuna[3];
      paket[7] = dst_check_sum (paket, 7);
      return dst_command(state, paket, 8);
}

static int dst_get_tuna(struct dst_state *state)
{
      int retval;

      if ((state->diseq_flags & ATTEMPT_TUNE) == 0)
            return 0;
      state->diseq_flags &= ~(HAS_LOCK);
      if (!dst_wait_dst_ready(state, NO_DELAY))
            return -EIO;
      if ((state->type_flags & DST_TYPE_HAS_VLF) &&
            !(state->dst_type == DST_TYPE_IS_ATSC))

            retval = read_dst(state, state->rx_tuna, 10);
      else
            retval = read_dst(state, &state->rx_tuna[2], FIXED_COMM);
      if (retval < 0) {
            dprintk(verbose, DST_DEBUG, 1, "read not successful");
            return retval;
      }
      if ((state->type_flags & DST_TYPE_HAS_VLF) &&
            !(state->dst_type == DST_TYPE_IS_CABLE) &&
            !(state->dst_type == DST_TYPE_IS_ATSC)) {

            if (state->rx_tuna[9] != dst_check_sum(&state->rx_tuna[0], 9)) {
                  dprintk(verbose, DST_INFO, 1, "checksum failure ? ");
                  return -EIO;
            }
      } else {
            if (state->rx_tuna[9] != dst_check_sum(&state->rx_tuna[2], 7)) {
                  dprintk(verbose, DST_INFO, 1, "checksum failure? ");
                  return -EIO;
            }
      }
      if (state->rx_tuna[2] == 0 && state->rx_tuna[3] == 0)
            return 0;
      if (state->dst_type == DST_TYPE_IS_SAT) {
            state->decode_freq = ((state->rx_tuna[2] & 0x7f) << 8) + state->rx_tuna[3];
      } else {
            state->decode_freq = ((state->rx_tuna[2] & 0x7f) << 16) + (state->rx_tuna[3] << 8) + state->rx_tuna[4];
      }
      state->decode_freq = state->decode_freq * 1000;
      state->decode_lock = 1;
      state->diseq_flags |= HAS_LOCK;

      return 1;
}

static int dst_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage);

static int dst_write_tuna(struct dvb_frontend *fe)
{
      struct dst_state *state = fe->demodulator_priv;
      int retval;
      u8 reply;

      dprintk(verbose, DST_INFO, 1, "type_flags 0x%x ", state->type_flags);
      state->decode_freq = 0;
      state->decode_lock = state->decode_strength = state->decode_snr = 0;
      if (state->dst_type == DST_TYPE_IS_SAT) {
            if (!(state->diseq_flags & HAS_POWER))
                  dst_set_voltage(fe, SEC_VOLTAGE_13);
      }
      state->diseq_flags &= ~(HAS_LOCK | ATTEMPT_TUNE);
      mutex_lock(&state->dst_mutex);
      if ((dst_comm_init(state)) < 0) {
            dprintk(verbose, DST_DEBUG, 1, "DST Communication initialization failed.");
            goto error;
      }
//    if (state->type_flags & DST_TYPE_HAS_NEWTUNE) {
      if ((state->type_flags & DST_TYPE_HAS_VLF) &&
            (!(state->dst_type == DST_TYPE_IS_ATSC))) {

            state->tx_tuna[9] = dst_check_sum(&state->tx_tuna[0], 9);
            retval = write_dst(state, &state->tx_tuna[0], 10);
      } else {
            state->tx_tuna[9] = dst_check_sum(&state->tx_tuna[2], 7);
            retval = write_dst(state, &state->tx_tuna[2], FIXED_COMM);
      }
      if (retval < 0) {
            dst_pio_disable(state);
            dprintk(verbose, DST_DEBUG, 1, "write not successful");
            goto werr;
      }
      if ((dst_pio_disable(state)) < 0) {
            dprintk(verbose, DST_DEBUG, 1, "DST PIO disable failed !");
            goto error;
      }
      if ((read_dst(state, &reply, GET_ACK) < 0)) {
            dprintk(verbose, DST_DEBUG, 1, "read verify not successful.");
            goto error;
      }
      if (reply != ACK) {
            dprintk(verbose, DST_DEBUG, 1, "write not acknowledged 0x%02x ", reply);
            goto error;
      }
      state->diseq_flags |= ATTEMPT_TUNE;
      retval = dst_get_tuna(state);
werr:
      mutex_unlock(&state->dst_mutex);
      return retval;

error:
      mutex_unlock(&state->dst_mutex);
      return -EIO;
}

/*
 * line22k0    0x00, 0x09, 0x00, 0xff, 0x01, 0x00, 0x00, 0x00
 * line22k1    0x00, 0x09, 0x01, 0xff, 0x01, 0x00, 0x00, 0x00
 * line22k2    0x00, 0x09, 0x02, 0xff, 0x01, 0x00, 0x00, 0x00
 * tone        0x00, 0x09, 0xff, 0x00, 0x01, 0x00, 0x00, 0x00
 * data        0x00, 0x09, 0xff, 0x01, 0x01, 0x00, 0x00, 0x00
 * power_off   0x00, 0x09, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00
 * power_on    0x00, 0x09, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00
 * Diseqc 1    0x00, 0x08, 0x04, 0xe0, 0x10, 0x38, 0xf0, 0xec
 * Diseqc 2    0x00, 0x08, 0x04, 0xe0, 0x10, 0x38, 0xf4, 0xe8
 * Diseqc 3    0x00, 0x08, 0x04, 0xe0, 0x10, 0x38, 0xf8, 0xe4
 * Diseqc 4    0x00, 0x08, 0x04, 0xe0, 0x10, 0x38, 0xfc, 0xe0
 */

static int dst_set_diseqc(struct dvb_frontend *fe, struct dvb_diseqc_master_cmd *cmd)
{
      struct dst_state *state = fe->demodulator_priv;
      u8 paket[8] = { 0x00, 0x08, 0x04, 0xe0, 0x10, 0x38, 0xf0, 0xec };

      if (state->dst_type != DST_TYPE_IS_SAT)
            return -EOPNOTSUPP;
      if (cmd->msg_len > 0 && cmd->msg_len < 5)
            memcpy(&paket[3], cmd->msg, cmd->msg_len);
      else if (cmd->msg_len == 5 && state->dst_hw_cap & DST_TYPE_HAS_DISEQC5)
            memcpy(&paket[2], cmd->msg, cmd->msg_len);
      else
            return -EINVAL;
      paket[7] = dst_check_sum(&paket[0], 7);
      return dst_command(state, paket, 8);
}

static int dst_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage)
{
      int need_cmd, retval = 0;
      struct dst_state *state = fe->demodulator_priv;

      state->voltage = voltage;
      if (state->dst_type != DST_TYPE_IS_SAT)
            return -EOPNOTSUPP;

      need_cmd = 0;

      switch (voltage) {
      case SEC_VOLTAGE_13:
      case SEC_VOLTAGE_18:
            if ((state->diseq_flags & HAS_POWER) == 0)
                  need_cmd = 1;
            state->diseq_flags |= HAS_POWER;
            state->tx_tuna[4] = 0x01;
            break;
      case SEC_VOLTAGE_OFF:
            need_cmd = 1;
            state->diseq_flags &= ~(HAS_POWER | HAS_LOCK | ATTEMPT_TUNE);
            state->tx_tuna[4] = 0x00;
            break;
      default:
            return -EINVAL;
      }

      if (need_cmd)
            retval = dst_tone_power_cmd(state);

      return retval;
}

static int dst_set_tone(struct dvb_frontend *fe, fe_sec_tone_mode_t tone)
{
      struct dst_state *state = fe->demodulator_priv;

      state->tone = tone;
      if (state->dst_type != DST_TYPE_IS_SAT)
            return -EOPNOTSUPP;

      switch (tone) {
      case SEC_TONE_OFF:
            if (state->type_flags & DST_TYPE_HAS_OBS_REGS)
                state->tx_tuna[2] = 0x00;
            else
                state->tx_tuna[2] = 0xff;
            break;

      case SEC_TONE_ON:
            state->tx_tuna[2] = 0x02;
            break;
      default:
            return -EINVAL;
      }
      return dst_tone_power_cmd(state);
}

static int dst_send_burst(struct dvb_frontend *fe, fe_sec_mini_cmd_t minicmd)
{
      struct dst_state *state = fe->demodulator_priv;

      if (state->dst_type != DST_TYPE_IS_SAT)
            return -EOPNOTSUPP;
      state->minicmd = minicmd;
      switch (minicmd) {
      case SEC_MINI_A:
            state->tx_tuna[3] = 0x02;
            break;
      case SEC_MINI_B:
            state->tx_tuna[3] = 0xff;
            break;
      }
      return dst_tone_power_cmd(state);
}


static int dst_init(struct dvb_frontend *fe)
{
      struct dst_state *state = fe->demodulator_priv;

      static u8 sat_tuna_188[] = { 0x09, 0x00, 0x03, 0xb6, 0x01, 0x00, 0x73, 0x21, 0x00, 0x00 };
      static u8 sat_tuna_204[] = { 0x00, 0x00, 0x03, 0xb6, 0x01, 0x55, 0xbd, 0x50, 0x00, 0x00 };
      static u8 ter_tuna_188[] = { 0x09, 0x00, 0x03, 0xb6, 0x01, 0x07, 0x00, 0x00, 0x00, 0x00 };
      static u8 ter_tuna_204[] = { 0x00, 0x00, 0x03, 0xb6, 0x01, 0x07, 0x00, 0x00, 0x00, 0x00 };
      static u8 cab_tuna_188[] = { 0x09, 0x00, 0x03, 0xb6, 0x01, 0x07, 0x00, 0x00, 0x00, 0x00 };
      static u8 cab_tuna_204[] = { 0x00, 0x00, 0x03, 0xb6, 0x01, 0x07, 0x00, 0x00, 0x00, 0x00 };
      static u8 atsc_tuner[] = { 0x00, 0x00, 0x03, 0xb6, 0x01, 0x07, 0x00, 0x00, 0x00, 0x00 };

      state->inversion = INVERSION_OFF;
      state->voltage = SEC_VOLTAGE_13;
      state->tone = SEC_TONE_OFF;
      state->diseq_flags = 0;
      state->k22 = 0x02;
      state->bandwidth = BANDWIDTH_7_MHZ;
      state->cur_jiff = jiffies;
      if (state->dst_type == DST_TYPE_IS_SAT)
            memcpy(state->tx_tuna, ((state->type_flags & DST_TYPE_HAS_VLF) ? sat_tuna_188 : sat_tuna_204), sizeof (sat_tuna_204));
      else if (state->dst_type == DST_TYPE_IS_TERR)
            memcpy(state->tx_tuna, ((state->type_flags & DST_TYPE_HAS_VLF) ? ter_tuna_188 : ter_tuna_204), sizeof (ter_tuna_204));
      else if (state->dst_type == DST_TYPE_IS_CABLE)
            memcpy(state->tx_tuna, ((state->type_flags & DST_TYPE_HAS_VLF) ? cab_tuna_188 : cab_tuna_204), sizeof (cab_tuna_204));
      else if (state->dst_type == DST_TYPE_IS_ATSC)
            memcpy(state->tx_tuna, atsc_tuner, sizeof (atsc_tuner));

      return 0;
}

static int dst_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
      struct dst_state *state = fe->demodulator_priv;

      *status = 0;
      if (state->diseq_flags & HAS_LOCK) {
//          dst_get_signal(state);  // don't require(?) to ask MCU
            if (state->decode_lock)
                  *status |= FE_HAS_LOCK | FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_SYNC | FE_HAS_VITERBI;
      }

      return 0;
}

static int dst_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
{
      struct dst_state *state = fe->demodulator_priv;

      int retval = dst_get_signal(state);
      *strength = state->decode_strength;

      return retval;
}

static int dst_read_snr(struct dvb_frontend *fe, u16 *snr)
{
      struct dst_state *state = fe->demodulator_priv;

      int retval = dst_get_signal(state);
      *snr = state->decode_snr;

      return retval;
}

static int dst_set_frontend(struct dvb_frontend *fe, struct dvb_frontend_parameters *p)
{
      int retval = -EINVAL;
      struct dst_state *state = fe->demodulator_priv;

      if (p != NULL) {
            retval = dst_set_freq(state, p->frequency);
            if(retval != 0)
                  return retval;
            dprintk(verbose, DST_DEBUG, 1, "Set Frequency=[%d]", p->frequency);

            if (state->dst_type == DST_TYPE_IS_SAT) {
                  if (state->type_flags & DST_TYPE_HAS_OBS_REGS)
                        dst_set_inversion(state, p->inversion);
                  dst_set_fec(state, p->u.qpsk.fec_inner);
                  dst_set_symbolrate(state, p->u.qpsk.symbol_rate);
                  dst_set_polarization(state);
                  dprintk(verbose, DST_DEBUG, 1, "Set Symbolrate=[%d]", p->u.qpsk.symbol_rate);

            } else if (state->dst_type == DST_TYPE_IS_TERR)
                  dst_set_bandwidth(state, p->u.ofdm.bandwidth);
            else if (state->dst_type == DST_TYPE_IS_CABLE) {
                  dst_set_fec(state, p->u.qam.fec_inner);
                  dst_set_symbolrate(state, p->u.qam.symbol_rate);
                  dst_set_modulation(state, p->u.qam.modulation);
            }
            retval = dst_write_tuna(fe);
      }

      return retval;
}

static int dst_tune_frontend(struct dvb_frontend* fe,
                      struct dvb_frontend_parameters* p,
                      unsigned int mode_flags,
                      unsigned int *delay,
                      fe_status_t *status)
{
      struct dst_state *state = fe->demodulator_priv;

      if (p != NULL) {
            dst_set_freq(state, p->frequency);
            dprintk(verbose, DST_DEBUG, 1, "Set Frequency=[%d]", p->frequency);

            if (state->dst_type == DST_TYPE_IS_SAT) {
                  if (state->type_flags & DST_TYPE_HAS_OBS_REGS)
                        dst_set_inversion(state, p->inversion);
                  dst_set_fec(state, p->u.qpsk.fec_inner);
                  dst_set_symbolrate(state, p->u.qpsk.symbol_rate);
                  dst_set_polarization(state);
                  dprintk(verbose, DST_DEBUG, 1, "Set Symbolrate=[%d]", p->u.qpsk.symbol_rate);

            } else if (state->dst_type == DST_TYPE_IS_TERR)
                  dst_set_bandwidth(state, p->u.ofdm.bandwidth);
            else if (state->dst_type == DST_TYPE_IS_CABLE) {
                  dst_set_fec(state, p->u.qam.fec_inner);
                  dst_set_symbolrate(state, p->u.qam.symbol_rate);
                  dst_set_modulation(state, p->u.qam.modulation);
            }
            dst_write_tuna(fe);
      }

      if (!(mode_flags & FE_TUNE_MODE_ONESHOT))
            dst_read_status(fe, status);

      *delay = HZ/10;
      return 0;
}

static int dst_get_tuning_algo(struct dvb_frontend *fe)
{
      return dst_algo;
}

static int dst_get_frontend(struct dvb_frontend *fe, struct dvb_frontend_parameters *p)
{
      struct dst_state *state = fe->demodulator_priv;

      p->frequency = state->decode_freq;
      if (state->dst_type == DST_TYPE_IS_SAT) {
            if (state->type_flags & DST_TYPE_HAS_OBS_REGS)
                  p->inversion = state->inversion;
            p->u.qpsk.symbol_rate = state->symbol_rate;
            p->u.qpsk.fec_inner = dst_get_fec(state);
      } else if (state->dst_type == DST_TYPE_IS_TERR) {
            p->u.ofdm.bandwidth = state->bandwidth;
      } else if (state->dst_type == DST_TYPE_IS_CABLE) {
            p->u.qam.symbol_rate = state->symbol_rate;
            p->u.qam.fec_inner = dst_get_fec(state);
            p->u.qam.modulation = dst_get_modulation(state);
      }

      return 0;
}

static void dst_release(struct dvb_frontend *fe)
{
      struct dst_state *state = fe->demodulator_priv;
      if (state->dst_ca) {
            dvb_unregister_device(state->dst_ca);
#ifdef CONFIG_DVB_CORE_ATTACH
            symbol_put(dst_ca_attach);
#endif
      }
      kfree(state);
}

static struct dvb_frontend_ops dst_dvbt_ops;
static struct dvb_frontend_ops dst_dvbs_ops;
static struct dvb_frontend_ops dst_dvbc_ops;
static struct dvb_frontend_ops dst_atsc_ops;

struct dst_state *dst_attach(struct dst_state *state, struct dvb_adapter *dvb_adapter)
{
      /* check if the ASIC is there */
      if (dst_probe(state) < 0) {
            kfree(state);
            return NULL;
      }
      /* determine settings based on type */
      /* create dvb_frontend */
      switch (state->dst_type) {
      case DST_TYPE_IS_TERR:
            memcpy(&state->frontend.ops, &dst_dvbt_ops, sizeof(struct dvb_frontend_ops));
            break;
      case DST_TYPE_IS_CABLE:
            memcpy(&state->frontend.ops, &dst_dvbc_ops, sizeof(struct dvb_frontend_ops));
            break;
      case DST_TYPE_IS_SAT:
            memcpy(&state->frontend.ops, &dst_dvbs_ops, sizeof(struct dvb_frontend_ops));
            break;
      case DST_TYPE_IS_ATSC:
            memcpy(&state->frontend.ops, &dst_atsc_ops, sizeof(struct dvb_frontend_ops));
            break;
      default:
            dprintk(verbose, DST_ERROR, 1, "unknown DST type. please report to the LinuxTV.org DVB mailinglist.");
            kfree(state);
            return NULL;
      }
      state->frontend.demodulator_priv = state;

      return state;                       /*    Manu (DST is a card not a frontend) */
}

EXPORT_SYMBOL(dst_attach);

static struct dvb_frontend_ops dst_dvbt_ops = {

      .info = {
            .name = "DST DVB-T",
            .type = FE_OFDM,
            .frequency_min = 137000000,
            .frequency_max = 858000000,
            .frequency_stepsize = 166667,
            .caps = FE_CAN_FEC_AUTO | FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO
      },

      .release = dst_release,
      .init = dst_init,
      .tune = dst_tune_frontend,
      .set_frontend = dst_set_frontend,
      .get_frontend = dst_get_frontend,
      .get_frontend_algo = dst_get_tuning_algo,
      .read_status = dst_read_status,
      .read_signal_strength = dst_read_signal_strength,
      .read_snr = dst_read_snr,
};

static struct dvb_frontend_ops dst_dvbs_ops = {

      .info = {
            .name = "DST DVB-S",
            .type = FE_QPSK,
            .frequency_min = 950000,
            .frequency_max = 2150000,
            .frequency_stepsize = 1000,   /* kHz for QPSK frontends */
            .frequency_tolerance = 29500,
            .symbol_rate_min = 1000000,
            .symbol_rate_max = 45000000,
      /*     . symbol_rate_tolerance      =     ???,*/
            .caps = FE_CAN_FEC_AUTO | FE_CAN_QPSK
      },

      .release = dst_release,
      .init = dst_init,
      .tune = dst_tune_frontend,
      .set_frontend = dst_set_frontend,
      .get_frontend = dst_get_frontend,
      .get_frontend_algo = dst_get_tuning_algo,
      .read_status = dst_read_status,
      .read_signal_strength = dst_read_signal_strength,
      .read_snr = dst_read_snr,
      .diseqc_send_burst = dst_send_burst,
      .diseqc_send_master_cmd = dst_set_diseqc,
      .set_voltage = dst_set_voltage,
      .set_tone = dst_set_tone,
};

static struct dvb_frontend_ops dst_dvbc_ops = {

      .info = {
            .name = "DST DVB-C",
            .type = FE_QAM,
            .frequency_stepsize = 62500,
            .frequency_min = 51000000,
            .frequency_max = 858000000,
            .symbol_rate_min = 1000000,
            .symbol_rate_max = 45000000,
      /*     . symbol_rate_tolerance      =     ???,*/
            .caps = FE_CAN_FEC_AUTO | FE_CAN_QAM_AUTO
      },

      .release = dst_release,
      .init = dst_init,
      .tune = dst_tune_frontend,
      .set_frontend = dst_set_frontend,
      .get_frontend = dst_get_frontend,
      .get_frontend_algo = dst_get_tuning_algo,
      .read_status = dst_read_status,
      .read_signal_strength = dst_read_signal_strength,
      .read_snr = dst_read_snr,
};

static struct dvb_frontend_ops dst_atsc_ops = {
      .info = {
            .name = "DST ATSC",
            .type = FE_ATSC,
            .frequency_stepsize = 62500,
            .frequency_min = 510000000,
            .frequency_max = 858000000,
            .symbol_rate_min = 1000000,
            .symbol_rate_max = 45000000,
            .caps = FE_CAN_FEC_AUTO | FE_CAN_QAM_AUTO | FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
      },

      .release = dst_release,
      .init = dst_init,
      .tune = dst_tune_frontend,
      .set_frontend = dst_set_frontend,
      .get_frontend = dst_get_frontend,
      .get_frontend_algo = dst_get_tuning_algo,
      .read_status = dst_read_status,
      .read_signal_strength = dst_read_signal_strength,
      .read_snr = dst_read_snr,
};

MODULE_DESCRIPTION("DST DVB-S/T/C/ATSC Combo Frontend driver");
MODULE_AUTHOR("Jamie Honan, Manu Abraham");
MODULE_LICENSE("GPL");

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