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msp3400-kthreads.c

/*
 * Programming the mspx4xx sound processor family
 *
 * (c) 1997-2001 Gerd Knorr <kraxel@bytesex.org>
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */


#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/freezer.h>
#include <linux/videodev.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <media/msp3400.h>
#include <linux/kthread.h>
#include <linux/suspend.h>
#include "msp3400-driver.h"

/* this one uses the automatic sound standard detection of newer msp34xx
   chip versions */
static struct {
      int retval;
      int main, second;
      char *name;
} msp_stdlist[] = {
      { 0x0000, 0, 0, "could not detect sound standard" },
      { 0x0001, 0, 0, "autodetect start" },
      { 0x0002, MSP_CARRIER(4.5), MSP_CARRIER(4.72), "4.5/4.72  M Dual FM-Stereo" },
      { 0x0003, MSP_CARRIER(5.5), MSP_CARRIER(5.7421875), "5.5/5.74  B/G Dual FM-Stereo" },
      { 0x0004, MSP_CARRIER(6.5), MSP_CARRIER(6.2578125), "6.5/6.25  D/K1 Dual FM-Stereo" },
      { 0x0005, MSP_CARRIER(6.5), MSP_CARRIER(6.7421875), "6.5/6.74  D/K2 Dual FM-Stereo" },
      { 0x0006, MSP_CARRIER(6.5), MSP_CARRIER(6.5), "6.5  D/K FM-Mono (HDEV3)" },
      { 0x0007, MSP_CARRIER(6.5), MSP_CARRIER(5.7421875), "6.5/5.74  D/K3 Dual FM-Stereo" },
      { 0x0008, MSP_CARRIER(5.5), MSP_CARRIER(5.85), "5.5/5.85  B/G NICAM FM" },
      { 0x0009, MSP_CARRIER(6.5), MSP_CARRIER(5.85), "6.5/5.85  L NICAM AM" },
      { 0x000a, MSP_CARRIER(6.0), MSP_CARRIER(6.55), "6.0/6.55  I NICAM FM" },
      { 0x000b, MSP_CARRIER(6.5), MSP_CARRIER(5.85), "6.5/5.85  D/K NICAM FM" },
      { 0x000c, MSP_CARRIER(6.5), MSP_CARRIER(5.85), "6.5/5.85  D/K NICAM FM (HDEV2)" },
      { 0x000d, MSP_CARRIER(6.5), MSP_CARRIER(5.85), "6.5/5.85  D/K NICAM FM (HDEV3)" },
      { 0x0020, MSP_CARRIER(4.5), MSP_CARRIER(4.5), "4.5  M BTSC-Stereo" },
      { 0x0021, MSP_CARRIER(4.5), MSP_CARRIER(4.5), "4.5  M BTSC-Mono + SAP" },
      { 0x0030, MSP_CARRIER(4.5), MSP_CARRIER(4.5), "4.5  M EIA-J Japan Stereo" },
      { 0x0040, MSP_CARRIER(10.7), MSP_CARRIER(10.7), "10.7  FM-Stereo Radio" },
      { 0x0050, MSP_CARRIER(6.5), MSP_CARRIER(6.5), "6.5  SAT-Mono" },
      { 0x0051, MSP_CARRIER(7.02), MSP_CARRIER(7.20), "7.02/7.20  SAT-Stereo" },
      { 0x0060, MSP_CARRIER(7.2), MSP_CARRIER(7.2), "7.2  SAT ADR" },
      {     -1, 0, 0, NULL }, /* EOF */
};

static struct msp3400c_init_data_dem {
      int fir1[6];
      int fir2[6];
      int cdo1;
      int cdo2;
      int ad_cv;
      int mode_reg;
      int dsp_src;
      int dsp_matrix;
} msp3400c_init_data[] = {
      {     /* AM (for carrier detect / msp3400) */
            {75, 19, 36, 35, 39, 40},
            {75, 19, 36, 35, 39, 40},
            MSP_CARRIER(5.5), MSP_CARRIER(5.5),
            0x00d0, 0x0500, 0x0020, 0x3000
      },{   /* AM (for carrier detect / msp3410) */
            {-1, -1, -8, 2, 59, 126},
            {-1, -1, -8, 2, 59, 126},
            MSP_CARRIER(5.5), MSP_CARRIER(5.5),
            0x00d0, 0x0100, 0x0020, 0x3000
      },{   /* FM Radio */
            {-8, -8, 4, 6, 78, 107},
            {-8, -8, 4, 6, 78, 107},
            MSP_CARRIER(10.7), MSP_CARRIER(10.7),
            0x00d0, 0x0480, 0x0020, 0x3000
      },{   /* Terrestial FM-mono + FM-stereo */
            {3, 18, 27, 48, 66, 72},
            {3, 18, 27, 48, 66, 72},
            MSP_CARRIER(5.5), MSP_CARRIER(5.5),
            0x00d0, 0x0480, 0x0030, 0x3000
      },{   /* Sat FM-mono */
            { 1, 9, 14, 24, 33, 37},
            { 3, 18, 27, 48, 66, 72},
            MSP_CARRIER(6.5), MSP_CARRIER(6.5),
            0x00c6, 0x0480, 0x0000, 0x3000
      },{   /* NICAM/FM --  B/G (5.5/5.85), D/K (6.5/5.85) */
            {-2, -8, -10, 10, 50, 86},
            {3, 18, 27, 48, 66, 72},
            MSP_CARRIER(5.5), MSP_CARRIER(5.5),
            0x00d0, 0x0040, 0x0120, 0x3000
      },{   /* NICAM/FM -- I (6.0/6.552) */
            {2, 4, -6, -4, 40, 94},
            {3, 18, 27, 48, 66, 72},
            MSP_CARRIER(6.0), MSP_CARRIER(6.0),
            0x00d0, 0x0040, 0x0120, 0x3000
      },{   /* NICAM/AM -- L (6.5/5.85) */
            {-2, -8, -10, 10, 50, 86},
            {-4, -12, -9, 23, 79, 126},
            MSP_CARRIER(6.5), MSP_CARRIER(6.5),
            0x00c6, 0x0140, 0x0120, 0x7c00
      },
};

struct msp3400c_carrier_detect {
      int   cdo;
      char *name;
};

static struct msp3400c_carrier_detect msp3400c_carrier_detect_main[] = {
      /* main carrier */
      { MSP_CARRIER(4.5),        "4.5   NTSC"                   },
      { MSP_CARRIER(5.5),        "5.5   PAL B/G"                },
      { MSP_CARRIER(6.0),        "6.0   PAL I"                  },
      { MSP_CARRIER(6.5),        "6.5   PAL D/K + SAT + SECAM"  }
};

static struct msp3400c_carrier_detect msp3400c_carrier_detect_55[] = {
      /* PAL B/G */
      { MSP_CARRIER(5.7421875),  "5.742 PAL B/G FM-stereo"     },
      { MSP_CARRIER(5.85),       "5.85  PAL B/G NICAM"         }
};

static struct msp3400c_carrier_detect msp3400c_carrier_detect_65[] = {
      /* PAL SAT / SECAM */
      { MSP_CARRIER(5.85),       "5.85  PAL D/K + SECAM NICAM" },
      { MSP_CARRIER(6.2578125),  "6.25  PAL D/K1 FM-stereo" },
      { MSP_CARRIER(6.7421875),  "6.74  PAL D/K2 FM-stereo" },
      { MSP_CARRIER(7.02),       "7.02  PAL SAT FM-stereo s/b" },
      { MSP_CARRIER(7.20),       "7.20  PAL SAT FM-stereo s"   },
      { MSP_CARRIER(7.38),       "7.38  PAL SAT FM-stereo b"   },
};

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

const char *msp_standard_std_name(int std)
{
      int i;

      for (i = 0; msp_stdlist[i].name != NULL; i++)
            if (msp_stdlist[i].retval == std)
                  return msp_stdlist[i].name;
      return "unknown";
}

static void msp_set_source(struct i2c_client *client, u16 src)
{
      struct msp_state *state = i2c_get_clientdata(client);

      if (msp_dolby) {
            msp_write_dsp(client, 0x0008, 0x0520); /* I2S1 */
            msp_write_dsp(client, 0x0009, 0x0620); /* I2S2 */
      } else {
            msp_write_dsp(client, 0x0008, src);
            msp_write_dsp(client, 0x0009, src);
      }
      msp_write_dsp(client, 0x000a, src);
      msp_write_dsp(client, 0x000b, src);
      msp_write_dsp(client, 0x000c, src);
      if (state->has_scart2_out)
            msp_write_dsp(client, 0x0041, src);
}

void msp3400c_set_carrier(struct i2c_client *client, int cdo1, int cdo2)
{
      msp_write_dem(client, 0x0093, cdo1 & 0xfff);
      msp_write_dem(client, 0x009b, cdo1 >> 12);
      msp_write_dem(client, 0x00a3, cdo2 & 0xfff);
      msp_write_dem(client, 0x00ab, cdo2 >> 12);
      msp_write_dem(client, 0x0056, 0); /* LOAD_REG_1/2 */
}

void msp3400c_set_mode(struct i2c_client *client, int mode)
{
      struct msp_state *state = i2c_get_clientdata(client);
      struct msp3400c_init_data_dem *data = &msp3400c_init_data[mode];
      int tuner = (state->routing.input >> 3) & 1;
      int i;

      v4l_dbg(1, msp_debug, client, "set_mode: %d\n", mode);
      state->mode = mode;
      state->rxsubchans = V4L2_TUNER_SUB_MONO;

      msp_write_dem(client, 0x00bb, data->ad_cv | (tuner ? 0x100 : 0));

      for (i = 5; i >= 0; i--)               /* fir 1 */
            msp_write_dem(client, 0x0001, data->fir1[i]);

      msp_write_dem(client, 0x0005, 0x0004); /* fir 2 */
      msp_write_dem(client, 0x0005, 0x0040);
      msp_write_dem(client, 0x0005, 0x0000);
      for (i = 5; i >= 0; i--)
            msp_write_dem(client, 0x0005, data->fir2[i]);

      msp_write_dem(client, 0x0083, data->mode_reg);

      msp3400c_set_carrier(client, data->cdo1, data->cdo2);

      msp_set_source(client, data->dsp_src);
      /* set prescales */

      /* volume prescale for SCART (AM mono input) */
      msp_write_dsp(client, 0x000d, 0x1900);
      msp_write_dsp(client, 0x000e, data->dsp_matrix);
      if (state->has_nicam) /* nicam prescale */
            msp_write_dsp(client, 0x0010, 0x5a00);
}

/* Set audio mode. Note that the pre-'G' models do not support BTSC+SAP,
   nor do they support stereo BTSC. */
static void msp3400c_set_audmode(struct i2c_client *client)
{
      static char *strmode[] = { "mono", "stereo", "lang2", "lang1", "lang1+lang2" };
      struct msp_state *state = i2c_get_clientdata(client);
      char *modestr = (state->audmode >= 0 && state->audmode < 5) ?
            strmode[state->audmode] : "unknown";
      int src = 0;      /* channel source: FM/AM, nicam or SCART */
      int audmode = state->audmode;

      if (state->opmode == OPMODE_AUTOSELECT) {
            /* this method would break everything, let's make sure
             * it's never called
             */
            v4l_dbg(1, msp_debug, client,
                  "set_audmode called with mode=%d instead of set_source (ignored)\n",
                  state->audmode);
            return;
      }

      /* Note: for the C and D revs no NTSC stereo + SAP is possible as
         the hardware does not support SAP. So the rxsubchans combination
         of STEREO | LANG2 does not occur. */

      if (state->mode != MSP_MODE_EXTERN) {
            /* switch to mono if only mono is available */
            if (state->rxsubchans == V4L2_TUNER_SUB_MONO)
                  audmode = V4L2_TUNER_MODE_MONO;
            /* if bilingual */
            else if (state->rxsubchans & V4L2_TUNER_SUB_LANG2) {
                  /* and mono or stereo, then fallback to lang1 */
                  if (audmode == V4L2_TUNER_MODE_MONO ||
                      audmode == V4L2_TUNER_MODE_STEREO)
                        audmode = V4L2_TUNER_MODE_LANG1;
            }
            /* if stereo, and audmode is not mono, then switch to stereo */
            else if (audmode != V4L2_TUNER_MODE_MONO)
                  audmode = V4L2_TUNER_MODE_STEREO;
      }

      /* switch demodulator */
      switch (state->mode) {
      case MSP_MODE_FM_TERRA:
            v4l_dbg(1, msp_debug, client, "FM set_audmode: %s\n", modestr);
            switch (audmode) {
            case V4L2_TUNER_MODE_STEREO:
                  msp_write_dsp(client, 0x000e, 0x3001);
                  break;
            case V4L2_TUNER_MODE_MONO:
            case V4L2_TUNER_MODE_LANG1:
            case V4L2_TUNER_MODE_LANG2:
            case V4L2_TUNER_MODE_LANG1_LANG2:
                  msp_write_dsp(client, 0x000e, 0x3000);
                  break;
            }
            break;
      case MSP_MODE_FM_SAT:
            v4l_dbg(1, msp_debug, client, "SAT set_audmode: %s\n", modestr);
            switch (audmode) {
            case V4L2_TUNER_MODE_MONO:
                  msp3400c_set_carrier(client, MSP_CARRIER(6.5), MSP_CARRIER(6.5));
                  break;
            case V4L2_TUNER_MODE_STEREO:
            case V4L2_TUNER_MODE_LANG1_LANG2:
                  msp3400c_set_carrier(client, MSP_CARRIER(7.2), MSP_CARRIER(7.02));
                  break;
            case V4L2_TUNER_MODE_LANG1:
                  msp3400c_set_carrier(client, MSP_CARRIER(7.38), MSP_CARRIER(7.02));
                  break;
            case V4L2_TUNER_MODE_LANG2:
                  msp3400c_set_carrier(client, MSP_CARRIER(7.38), MSP_CARRIER(7.02));
                  break;
            }
            break;
      case MSP_MODE_FM_NICAM1:
      case MSP_MODE_FM_NICAM2:
      case MSP_MODE_AM_NICAM:
            v4l_dbg(1, msp_debug, client, "NICAM set_audmode: %s\n",modestr);
            if (state->nicam_on)
                  src = 0x0100;  /* NICAM */
            break;
      case MSP_MODE_BTSC:
            v4l_dbg(1, msp_debug, client, "BTSC set_audmode: %s\n",modestr);
            break;
      case MSP_MODE_EXTERN:
            v4l_dbg(1, msp_debug, client, "extern set_audmode: %s\n",modestr);
            src = 0x0200;  /* SCART */
            break;
      case MSP_MODE_FM_RADIO:
            v4l_dbg(1, msp_debug, client, "FM-Radio set_audmode: %s\n",modestr);
            break;
      default:
            v4l_dbg(1, msp_debug, client, "mono set_audmode\n");
            return;
      }

      /* switch audio */
      v4l_dbg(1, msp_debug, client, "set audmode %d\n", audmode);
      switch (audmode) {
      case V4L2_TUNER_MODE_STEREO:
      case V4L2_TUNER_MODE_LANG1_LANG2:
            src |= 0x0020;
            break;
      case V4L2_TUNER_MODE_MONO:
            if (state->mode == MSP_MODE_AM_NICAM) {
                  v4l_dbg(1, msp_debug, client, "switching to AM mono\n");
                  /* AM mono decoding is handled by tuner, not MSP chip */
                  /* SCART switching control register */
                  msp_set_scart(client, SCART_MONO, 0);
                  src = 0x0200;
                  break;
            }
            if (state->rxsubchans & V4L2_TUNER_SUB_STEREO)
                  src = 0x0030;
            break;
      case V4L2_TUNER_MODE_LANG1:
            break;
      case V4L2_TUNER_MODE_LANG2:
            src |= 0x0010;
            break;
      }
      v4l_dbg(1, msp_debug, client, "set_audmode final source/matrix = 0x%x\n", src);

      msp_set_source(client, src);
}

static void msp3400c_print_mode(struct i2c_client *client)
{
      struct msp_state *state = i2c_get_clientdata(client);

      if (state->main == state->second) {
            v4l_dbg(1, msp_debug, client, "mono sound carrier: %d.%03d MHz\n",
                   state->main / 910000, (state->main / 910) % 1000);
      } else {
            v4l_dbg(1, msp_debug, client, "main sound carrier: %d.%03d MHz\n",
                   state->main / 910000, (state->main / 910) % 1000);
      }
      if (state->mode == MSP_MODE_FM_NICAM1 || state->mode == MSP_MODE_FM_NICAM2)
            v4l_dbg(1, msp_debug, client, "NICAM/FM carrier  : %d.%03d MHz\n",
                   state->second / 910000, (state->second/910) % 1000);
      if (state->mode == MSP_MODE_AM_NICAM)
            v4l_dbg(1, msp_debug, client, "NICAM/AM carrier  : %d.%03d MHz\n",
                   state->second / 910000, (state->second / 910) % 1000);
      if (state->mode == MSP_MODE_FM_TERRA && state->main != state->second) {
            v4l_dbg(1, msp_debug, client, "FM-stereo carrier : %d.%03d MHz\n",
                   state->second / 910000, (state->second / 910) % 1000);
      }
}

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

static int msp3400c_detect_stereo(struct i2c_client *client)
{
      struct msp_state *state = i2c_get_clientdata(client);
      int val;
      int rxsubchans = state->rxsubchans;
      int newnicam = state->nicam_on;
      int update = 0;

      switch (state->mode) {
      case MSP_MODE_FM_TERRA:
            val = msp_read_dsp(client, 0x18);
            if (val > 32767)
                  val -= 65536;
            v4l_dbg(2, msp_debug, client, "stereo detect register: %d\n", val);
            if (val > 8192) {
                  rxsubchans = V4L2_TUNER_SUB_STEREO;
            } else if (val < -4096) {
                  rxsubchans = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
            } else {
                  rxsubchans = V4L2_TUNER_SUB_MONO;
            }
            newnicam = 0;
            break;
      case MSP_MODE_FM_NICAM1:
      case MSP_MODE_FM_NICAM2:
      case MSP_MODE_AM_NICAM:
            val = msp_read_dem(client, 0x23);
            v4l_dbg(2, msp_debug, client, "nicam sync=%d, mode=%d\n",
                  val & 1, (val & 0x1e) >> 1);

            if (val & 1) {
                  /* nicam synced */
                  switch ((val & 0x1e) >> 1)  {
                  case 0:
                  case 8:
                        rxsubchans = V4L2_TUNER_SUB_STEREO;
                        break;
                  case 1:
                  case 9:
                        rxsubchans = V4L2_TUNER_SUB_MONO;
                        break;
                  case 2:
                  case 10:
                        rxsubchans = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
                        break;
                  default:
                        rxsubchans = V4L2_TUNER_SUB_MONO;
                        break;
                  }
                  newnicam = 1;
            } else {
                  newnicam = 0;
                  rxsubchans = V4L2_TUNER_SUB_MONO;
            }
            break;
      }
      if (rxsubchans != state->rxsubchans) {
            update = 1;
            v4l_dbg(1, msp_debug, client, "watch: rxsubchans %02x => %02x\n",
                  state->rxsubchans, rxsubchans);
            state->rxsubchans = rxsubchans;
      }
      if (newnicam != state->nicam_on) {
            update = 1;
            v4l_dbg(1, msp_debug, client, "watch: nicam %d => %d\n",
                  state->nicam_on, newnicam);
            state->nicam_on = newnicam;
      }
      return update;
}

/*
 * A kernel thread for msp3400 control -- we don't want to block the
 * in the ioctl while doing the sound carrier & stereo detect
 */
/* stereo/multilang monitoring */
static void watch_stereo(struct i2c_client *client)
{
      struct msp_state *state = i2c_get_clientdata(client);

      if (msp_detect_stereo(client)) {
            msp_set_audmode(client);
      }

      if (msp_once)
            state->watch_stereo = 0;
}

int msp3400c_thread(void *data)
{
      struct i2c_client *client = data;
      struct msp_state *state = i2c_get_clientdata(client);
      struct msp3400c_carrier_detect *cd;
      int count, max1, max2, val1, val2, val, this;


      v4l_dbg(1, msp_debug, client, "msp3400 daemon started\n");
      set_freezable();
      for (;;) {
            v4l_dbg(2, msp_debug, client, "msp3400 thread: sleep\n");
            msp_sleep(state, -1);
            v4l_dbg(2, msp_debug, client, "msp3400 thread: wakeup\n");

      restart:
            v4l_dbg(2, msp_debug, client, "thread: restart scan\n");
            state->restart = 0;
            if (kthread_should_stop())
                  break;

            if (state->radio || MSP_MODE_EXTERN == state->mode) {
                  /* no carrier scan, just unmute */
                  v4l_dbg(1, msp_debug, client, "thread: no carrier scan\n");
                  state->scan_in_progress = 0;
                  msp_set_audio(client);
                  continue;
            }

            /* mute audio */
            state->scan_in_progress = 1;
            msp_set_audio(client);

            msp3400c_set_mode(client, MSP_MODE_AM_DETECT);
            val1 = val2 = 0;
            max1 = max2 = -1;
            state->watch_stereo = 0;
            state->nicam_on = 0;

            /* wait for tuner to settle down after a channel change */
            if (msp_sleep(state, 200))
                  goto restart;

            /* carrier detect pass #1 -- main carrier */
            cd = msp3400c_carrier_detect_main;
            count = ARRAY_SIZE(msp3400c_carrier_detect_main);

            if (msp_amsound && (state->v4l2_std & V4L2_STD_SECAM)) {
                  /* autodetect doesn't work well with AM ... */
                  max1 = 3;
                  count = 0;
                  v4l_dbg(1, msp_debug, client, "AM sound override\n");
            }

            for (this = 0; this < count; this++) {
                  msp3400c_set_carrier(client, cd[this].cdo, cd[this].cdo);
                  if (msp_sleep(state,100))
                        goto restart;
                  val = msp_read_dsp(client, 0x1b);
                  if (val > 32767)
                        val -= 65536;
                  if (val1 < val)
                        val1 = val, max1 = this;
                  v4l_dbg(1, msp_debug, client, "carrier1 val: %5d / %s\n", val,cd[this].name);
            }

            /* carrier detect pass #2 -- second (stereo) carrier */
            switch (max1) {
            case 1: /* 5.5 */
                  cd = msp3400c_carrier_detect_55;
                  count = ARRAY_SIZE(msp3400c_carrier_detect_55);
                  break;
            case 3: /* 6.5 */
                  cd = msp3400c_carrier_detect_65;
                  count = ARRAY_SIZE(msp3400c_carrier_detect_65);
                  break;
            case 0: /* 4.5 */
            case 2: /* 6.0 */
            default:
                  cd = NULL;
                  count = 0;
                  break;
            }

            if (msp_amsound && (state->v4l2_std & V4L2_STD_SECAM)) {
                  /* autodetect doesn't work well with AM ... */
                  cd = NULL;
                  count = 0;
                  max2 = 0;
            }
            for (this = 0; this < count; this++) {
                  msp3400c_set_carrier(client, cd[this].cdo, cd[this].cdo);
                  if (msp_sleep(state,100))
                        goto restart;
                  val = msp_read_dsp(client, 0x1b);
                  if (val > 32767)
                        val -= 65536;
                  if (val2 < val)
                        val2 = val, max2 = this;
                  v4l_dbg(1, msp_debug, client, "carrier2 val: %5d / %s\n", val,cd[this].name);
            }

            /* program the msp3400 according to the results */
            state->main = msp3400c_carrier_detect_main[max1].cdo;
            switch (max1) {
            case 1: /* 5.5 */
                  if (max2 == 0) {
                        /* B/G FM-stereo */
                        state->second = msp3400c_carrier_detect_55[max2].cdo;
                        msp3400c_set_mode(client, MSP_MODE_FM_TERRA);
                        state->watch_stereo = 1;
                  } else if (max2 == 1 && state->has_nicam) {
                        /* B/G NICAM */
                        state->second = msp3400c_carrier_detect_55[max2].cdo;
                        msp3400c_set_mode(client, MSP_MODE_FM_NICAM1);
                        state->nicam_on = 1;
                        state->watch_stereo = 1;
                  } else {
                        goto no_second;
                  }
                  break;
            case 2: /* 6.0 */
                  /* PAL I NICAM */
                  state->second = MSP_CARRIER(6.552);
                  msp3400c_set_mode(client, MSP_MODE_FM_NICAM2);
                  state->nicam_on = 1;
                  state->watch_stereo = 1;
                  break;
            case 3: /* 6.5 */
                  if (max2 == 1 || max2 == 2) {
                        /* D/K FM-stereo */
                        state->second = msp3400c_carrier_detect_65[max2].cdo;
                        msp3400c_set_mode(client, MSP_MODE_FM_TERRA);
                        state->watch_stereo = 1;
                  } else if (max2 == 0 && (state->v4l2_std & V4L2_STD_SECAM)) {
                        /* L NICAM or AM-mono */
                        state->second = msp3400c_carrier_detect_65[max2].cdo;
                        msp3400c_set_mode(client, MSP_MODE_AM_NICAM);
                        state->watch_stereo = 1;
                  } else if (max2 == 0 && state->has_nicam) {
                        /* D/K NICAM */
                        state->second = msp3400c_carrier_detect_65[max2].cdo;
                        msp3400c_set_mode(client, MSP_MODE_FM_NICAM1);
                        state->nicam_on = 1;
                        state->watch_stereo = 1;
                  } else {
                        goto no_second;
                  }
                  break;
            case 0: /* 4.5 */
            default:
            no_second:
                  state->second = msp3400c_carrier_detect_main[max1].cdo;
                  msp3400c_set_mode(client, MSP_MODE_FM_TERRA);
                  break;
            }
            msp3400c_set_carrier(client, state->second, state->main);

            /* unmute */
            state->scan_in_progress = 0;
            msp3400c_set_audmode(client);
            msp_set_audio(client);

            if (msp_debug)
                  msp3400c_print_mode(client);

            /* monitor tv audio mode, the first time don't wait
               so long to get a quick stereo/bilingual result */
            count = 3;
            while (state->watch_stereo) {
                  if (msp_sleep(state, count ? 1000 : 5000))
                        goto restart;
                  if (count) count--;
                  watch_stereo(client);
            }
      }
      v4l_dbg(1, msp_debug, client, "thread: exit\n");
      return 0;
}


int msp3410d_thread(void *data)
{
      struct i2c_client *client = data;
      struct msp_state *state = i2c_get_clientdata(client);
      int val, i, std, count;

      v4l_dbg(1, msp_debug, client, "msp3410 daemon started\n");
      set_freezable();
      for (;;) {
            v4l_dbg(2, msp_debug, client, "msp3410 thread: sleep\n");
            msp_sleep(state,-1);
            v4l_dbg(2, msp_debug, client, "msp3410 thread: wakeup\n");

      restart:
            v4l_dbg(2, msp_debug, client, "thread: restart scan\n");
            state->restart = 0;
            if (kthread_should_stop())
                  break;

            if (state->mode == MSP_MODE_EXTERN) {
                  /* no carrier scan needed, just unmute */
                  v4l_dbg(1, msp_debug, client, "thread: no carrier scan\n");
                  state->scan_in_progress = 0;
                  msp_set_audio(client);
                  continue;
            }

            /* mute audio */
            state->scan_in_progress = 1;
            msp_set_audio(client);

            /* start autodetect. Note: autodetect is not supported for
               NTSC-M and radio, hence we force the standard in those cases. */
            if (state->radio)
                  std = 0x40;
            else
                  std = (state->v4l2_std & V4L2_STD_NTSC) ? 0x20 : 1;
            state->watch_stereo = 0;
            state->nicam_on = 0;

            /* wait for tuner to settle down after a channel change */
            if (msp_sleep(state, 200))
                  goto restart;

            if (msp_debug)
                  v4l_dbg(2, msp_debug, client, "setting standard: %s (0x%04x)\n",
                         msp_standard_std_name(std), std);

            if (std != 1) {
                  /* programmed some specific mode */
                  val = std;
            } else {
                  /* triggered autodetect */
                  msp_write_dem(client, 0x20, std);
                  for (;;) {
                        if (msp_sleep(state, 100))
                              goto restart;

                        /* check results */
                        val = msp_read_dem(client, 0x7e);
                        if (val < 0x07ff)
                              break;
                        v4l_dbg(2, msp_debug, client, "detection still in progress\n");
                  }
            }
            for (i = 0; msp_stdlist[i].name != NULL; i++)
                  if (msp_stdlist[i].retval == val)
                        break;
            v4l_dbg(1, msp_debug, client, "current standard: %s (0x%04x)\n",
                  msp_standard_std_name(val), val);
            state->main   = msp_stdlist[i].main;
            state->second = msp_stdlist[i].second;
            state->std = val;
            state->rxsubchans = V4L2_TUNER_SUB_MONO;

            if (msp_amsound && !state->radio && (state->v4l2_std & V4L2_STD_SECAM) &&
                        (val != 0x0009)) {
                  /* autodetection has failed, let backup */
                  v4l_dbg(1, msp_debug, client, "autodetection failed,"
                        " switching to backup standard: %s (0x%04x)\n",
                        msp_stdlist[8].name ? msp_stdlist[8].name : "unknown",val);
                  state->std = val = 0x0009;
                  msp_write_dem(client, 0x20, val);
            }

            /* set stereo */
            switch (val) {
            case 0x0008: /* B/G NICAM */
            case 0x000a: /* I NICAM */
            case 0x000b: /* D/K NICAM */
                  if (val == 0x000a)
                        state->mode = MSP_MODE_FM_NICAM2;
                  else
                        state->mode = MSP_MODE_FM_NICAM1;
                  /* just turn on stereo */
                  state->nicam_on = 1;
                  state->watch_stereo = 1;
                  break;
            case 0x0009:
                  state->mode = MSP_MODE_AM_NICAM;
                  state->nicam_on = 1;
                  state->watch_stereo = 1;
                  break;
            case 0x0020: /* BTSC */
                  /* The pre-'G' models only have BTSC-mono */
                  state->mode = MSP_MODE_BTSC;
                  break;
            case 0x0040: /* FM radio */
                  state->mode = MSP_MODE_FM_RADIO;
                  state->rxsubchans = V4L2_TUNER_SUB_STEREO;
                  /* not needed in theory if we have radio, but
                     short programming enables carrier mute */
                  msp3400c_set_mode(client, MSP_MODE_FM_RADIO);
                  msp3400c_set_carrier(client, MSP_CARRIER(10.7),
                                  MSP_CARRIER(10.7));
                  break;
            case 0x0002:
            case 0x0003:
            case 0x0004:
            case 0x0005:
                  state->mode = MSP_MODE_FM_TERRA;
                  state->watch_stereo = 1;
                  break;
            }

            /* set various prescales */
            msp_write_dsp(client, 0x0d, 0x1900); /* scart */
            msp_write_dsp(client, 0x0e, 0x3000); /* FM */
            if (state->has_nicam)
                  msp_write_dsp(client, 0x10, 0x5a00); /* nicam */

            if (state->has_i2s_conf)
                  msp_write_dem(client, 0x40, state->i2s_mode);

            /* unmute */
            msp3400c_set_audmode(client);
            state->scan_in_progress = 0;
            msp_set_audio(client);

            /* monitor tv audio mode, the first time don't wait
               so long to get a quick stereo/bilingual result */
            count = 3;
            while (state->watch_stereo) {
                  if (msp_sleep(state, count ? 1000 : 5000))
                        goto restart;
                  if (count) count--;
                  watch_stereo(client);
            }
      }
      v4l_dbg(1, msp_debug, client, "thread: exit\n");
      return 0;
}

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

/* msp34xxG + (autoselect no-thread)
 * this one uses both automatic standard detection and automatic sound
 * select which are available in the newer G versions
 * struct msp: only norm, acb and source are really used in this mode
 */

static int msp34xxg_modus(struct i2c_client *client)
{
      struct msp_state *state = i2c_get_clientdata(client);

      if (state->radio) {
            v4l_dbg(1, msp_debug, client, "selected radio modus\n");
            return 0x0001;
      }

      if (state->v4l2_std & V4L2_STD_PAL) {
            v4l_dbg(1, msp_debug, client, "selected PAL modus\n");
            return 0x7001;
      }
      if (state->v4l2_std == V4L2_STD_NTSC_M_JP) {
            v4l_dbg(1, msp_debug, client, "selected M (EIA-J) modus\n");
            return 0x4001;
      }
      if (state->v4l2_std == V4L2_STD_NTSC_M_KR) {
            v4l_dbg(1, msp_debug, client, "selected M (A2) modus\n");
            return 0x0001;
      }
      if (state->v4l2_std & V4L2_STD_MN) {
            v4l_dbg(1, msp_debug, client, "selected M (BTSC) modus\n");
            return 0x2001;
      }
      if (state->v4l2_std & V4L2_STD_SECAM) {
            v4l_dbg(1, msp_debug, client, "selected SECAM modus\n");
            return 0x6001;
      }
      return 0x0001;
}

static void msp34xxg_set_source(struct i2c_client *client, u16 reg, int in)
 {
      struct msp_state *state = i2c_get_clientdata(client);
      int source, matrix;

      switch (state->audmode) {
      case V4L2_TUNER_MODE_MONO:
            source = 0; /* mono only */
            matrix = 0x30;
            break;
      case V4L2_TUNER_MODE_LANG2:
            source = 4; /* stereo or B */
            matrix = 0x10;
            break;
      case V4L2_TUNER_MODE_LANG1_LANG2:
            source = 1; /* stereo or A|B */
            matrix = 0x20;
            break;
      case V4L2_TUNER_MODE_LANG1:
            source = 3; /* stereo or A */
            matrix = 0x00;
            break;
      case V4L2_TUNER_MODE_STEREO:
      default:
            source = 3; /* stereo or A */
            matrix = 0x20;
            break;
      }

      if (in == MSP_DSP_IN_TUNER)
            source = (source << 8) | 0x20;
      /* the msp34x2g puts the MAIN_AVC, MAIN and AUX sources in 12, 13, 14
         instead of 11, 12, 13. So we add one for that msp version. */
      else if (in >= MSP_DSP_IN_MAIN_AVC && state->has_dolby_pro_logic)
            source = ((in + 1) << 8) | matrix;
      else
            source = (in << 8) | matrix;

      v4l_dbg(1, msp_debug, client, "set source to %d (0x%x) for output %02x\n",
                  in, source, reg);
      msp_write_dsp(client, reg, source);
}

static void msp34xxg_set_sources(struct i2c_client *client)
{
      struct msp_state *state = i2c_get_clientdata(client);
      u32 in = state->routing.input;

      msp34xxg_set_source(client, 0x0008, (in >> 4) & 0xf);
      /* quasi-peak detector is set to same input as the loudspeaker (MAIN) */
      msp34xxg_set_source(client, 0x000c, (in >> 4) & 0xf);
      msp34xxg_set_source(client, 0x0009, (in >> 8) & 0xf);
      msp34xxg_set_source(client, 0x000a, (in >> 12) & 0xf);
      if (state->has_scart2_out)
            msp34xxg_set_source(client, 0x0041, (in >> 16) & 0xf);
      msp34xxg_set_source(client, 0x000b, (in >> 20) & 0xf);
}

/* (re-)initialize the msp34xxg */
static void msp34xxg_reset(struct i2c_client *client)
{
      struct msp_state *state = i2c_get_clientdata(client);
      int tuner = (state->routing.input >> 3) & 1;
      int modus;

      /* initialize std to 1 (autodetect) to signal that no standard is
         selected yet. */
      state->std = 1;

      msp_reset(client);

      if (state->has_i2s_conf)
            msp_write_dem(client, 0x40, state->i2s_mode);

      /* step-by-step initialisation, as described in the manual */
      modus = msp34xxg_modus(client);
      modus |= tuner ? 0x100 : 0;
      msp_write_dem(client, 0x30, modus);

      /* write the dsps that may have an influence on
         standard/audio autodetection right now */
      msp34xxg_set_sources(client);

      msp_write_dsp(client, 0x0d, 0x1900); /* scart */
      msp_write_dsp(client, 0x0e, 0x3000); /* FM */
      if (state->has_nicam)
            msp_write_dsp(client, 0x10, 0x5a00); /* nicam */

      /* set identification threshold. Personally, I
       * I set it to a higher value than the default
       * of 0x190 to ignore noisy stereo signals.
       * this needs tuning. (recommended range 0x00a0-0x03c0)
       * 0x7f0 = forced mono mode
       *
       * a2 threshold for stereo/bilingual.
       * Note: this register is part of the Manual/Compatibility mode.
       * It is supported by all 'G'-family chips.
       */
      msp_write_dem(client, 0x22, msp_stereo_thresh);
}

int msp34xxg_thread(void *data)
{
      struct i2c_client *client = data;
      struct msp_state *state = i2c_get_clientdata(client);
      int val, i;

      v4l_dbg(1, msp_debug, client, "msp34xxg daemon started\n");
      set_freezable();
      for (;;) {
            v4l_dbg(2, msp_debug, client, "msp34xxg thread: sleep\n");
            msp_sleep(state, -1);
            v4l_dbg(2, msp_debug, client, "msp34xxg thread: wakeup\n");

      restart:
            v4l_dbg(1, msp_debug, client, "thread: restart scan\n");
            state->restart = 0;
            if (kthread_should_stop())
                  break;

            if (state->mode == MSP_MODE_EXTERN) {
                  /* no carrier scan needed, just unmute */
                  v4l_dbg(1, msp_debug, client, "thread: no carrier scan\n");
                  state->scan_in_progress = 0;
                  msp_set_audio(client);
                  continue;
            }

            /* setup the chip*/
            msp34xxg_reset(client);
            state->std = state->radio ? 0x40 :
                  (state->force_btsc && msp_standard == 1) ? 32 : msp_standard;
            msp_write_dem(client, 0x20, state->std);
            /* start autodetect */
            if (state->std != 1)
                  goto unmute;

            /* watch autodetect */
            v4l_dbg(1, msp_debug, client, "started autodetect, waiting for result\n");
            for (i = 0; i < 10; i++) {
                  if (msp_sleep(state, 100))
                        goto restart;

                  /* check results */
                  val = msp_read_dem(client, 0x7e);
                  if (val < 0x07ff) {
                        state->std = val;
                        break;
                  }
                  v4l_dbg(2, msp_debug, client, "detection still in progress\n");
            }
            if (state->std == 1) {
                  v4l_dbg(1, msp_debug, client, "detection still in progress after 10 tries. giving up.\n");
                  continue;
            }

      unmute:
            v4l_dbg(1, msp_debug, client, "detected standard: %s (0x%04x)\n",
                  msp_standard_std_name(state->std), state->std);

            if (state->std == 9) {
                  /* AM NICAM mode */
                  msp_write_dsp(client, 0x0e, 0x7c00);
            }

            /* unmute: dispatch sound to scart output, set scart volume */
            msp_set_audio(client);

            /* restore ACB */
            if (msp_write_dsp(client, 0x13, state->acb))
                  return -1;

            /* the periodic stereo/SAP check is only relevant for
               the 0x20 standard (BTSC) */
            if (state->std != 0x20)
                  continue;

            state->watch_stereo = 1;

            /* monitor tv audio mode, the first time don't wait
               in order to get a quick stereo/SAP update */
            watch_stereo(client);
            while (state->watch_stereo) {
                  watch_stereo(client);
                  if (msp_sleep(state, 5000))
                        goto restart;
            }
      }
      v4l_dbg(1, msp_debug, client, "thread: exit\n");
      return 0;
}

static int msp34xxg_detect_stereo(struct i2c_client *client)
{
      struct msp_state *state = i2c_get_clientdata(client);
      int status = msp_read_dem(client, 0x0200);
      int is_bilingual = status & 0x100;
      int is_stereo = status & 0x40;
      int oldrx = state->rxsubchans;

      if (state->mode == MSP_MODE_EXTERN)
            return 0;

      state->rxsubchans = 0;
      if (is_stereo)
            state->rxsubchans = V4L2_TUNER_SUB_STEREO;
      else
            state->rxsubchans = V4L2_TUNER_SUB_MONO;
      if (is_bilingual) {
            if (state->std == 0x20)
                  state->rxsubchans |= V4L2_TUNER_SUB_SAP;
            else
                  state->rxsubchans = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
      }
      v4l_dbg(1, msp_debug, client, "status=0x%x, stereo=%d, bilingual=%d -> rxsubchans=%d\n",
            status, is_stereo, is_bilingual, state->rxsubchans);
      return (oldrx != state->rxsubchans);
}

static void msp34xxg_set_audmode(struct i2c_client *client)
{
      struct msp_state *state = i2c_get_clientdata(client);

      if (state->std == 0x20) {
             if ((state->rxsubchans & V4L2_TUNER_SUB_SAP) &&
               (state->audmode == V4L2_TUNER_MODE_LANG1_LANG2 ||
                state->audmode == V4L2_TUNER_MODE_LANG2)) {
                  msp_write_dem(client, 0x20, 0x21);
             } else {
                  msp_write_dem(client, 0x20, 0x20);
             }
      }

      msp34xxg_set_sources(client);
}

void msp_set_audmode(struct i2c_client *client)
{
      struct msp_state *state = i2c_get_clientdata(client);

      switch (state->opmode) {
      case OPMODE_MANUAL:
      case OPMODE_AUTODETECT:
            msp3400c_set_audmode(client);
            break;
      case OPMODE_AUTOSELECT:
            msp34xxg_set_audmode(client);
            break;
      }
}

int msp_detect_stereo(struct i2c_client *client)
{
      struct msp_state *state  = i2c_get_clientdata(client);

      switch (state->opmode) {
      case OPMODE_MANUAL:
      case OPMODE_AUTODETECT:
            return msp3400c_detect_stereo(client);
      case OPMODE_AUTOSELECT:
            return msp34xxg_detect_stereo(client);
      }
      return 0;
}


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