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saa7134-tvaudio.c

/*
 *
 * device driver for philips saa7134 based TV cards
 * tv audio decoder (fm stereo, nicam, ...)
 *
 * (c) 2001-03 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/freezer.h>
#include <asm/div64.h>

#include "saa7134-reg.h"
#include "saa7134.h"

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

static unsigned int audio_debug = 0;
module_param(audio_debug, int, 0644);
MODULE_PARM_DESC(audio_debug,"enable debug messages [tv audio]");

static unsigned int audio_ddep = 0;
module_param(audio_ddep, int, 0644);
MODULE_PARM_DESC(audio_ddep,"audio ddep overwrite");

static int audio_clock_override = UNSET;
module_param(audio_clock_override, int, 0644);

static int audio_clock_tweak = 0;
module_param(audio_clock_tweak, int, 0644);
MODULE_PARM_DESC(audio_clock_tweak, "Audio clock tick fine tuning for cards with audio crystal that's slightly off (range [-1024 .. 1024])");

#define dprintk(fmt, arg...)  if (audio_debug) \
      printk(KERN_DEBUG "%s/audio: " fmt, dev->name , ## arg)
#define d2printk(fmt, arg...) if (audio_debug > 1) \
      printk(KERN_DEBUG "%s/audio: " fmt, dev->name, ## arg)

#define print_regb(reg) printk("%s:   reg 0x%03x [%-16s]: 0x%02x\n", \
            dev->name,(SAA7134_##reg),(#reg),saa_readb((SAA7134_##reg)))

/* msecs */
#define SCAN_INITIAL_DELAY     1000
#define SCAN_SAMPLE_DELAY       200
#define SCAN_SUBCARRIER_DELAY  2000

/* ------------------------------------------------------------------ */
/* saa7134 code                                                       */

static struct mainscan {
      char         *name;
      v4l2_std_id  std;
      int          carr;
} mainscan[] = {
      {
            .name = "MN",
            .std  = V4L2_STD_MN,
            .carr = 4500,
      },{
            .name = "BGH",
            .std  = V4L2_STD_B | V4L2_STD_GH,
            .carr = 5500,
      },{
            .name = "I",
            .std  = V4L2_STD_PAL_I,
            .carr = 6000,
      },{
            .name = "DKL",
            .std  = V4L2_STD_DK | V4L2_STD_SECAM_L | V4L2_STD_SECAM_LC,
            .carr = 6500,
      }
};

static struct saa7134_tvaudio tvaudio[] = {
      {
            .name          = "PAL-B/G FM-stereo",
            .std           = V4L2_STD_PAL_BG,
            .mode          = TVAUDIO_FM_BG_STEREO,
            .carr1         = 5500,
            .carr2         = 5742,
      },{
            .name          = "PAL-D/K1 FM-stereo",
            .std           = V4L2_STD_PAL_DK,
            .carr1         = 6500,
            .carr2         = 6258,
            .mode          = TVAUDIO_FM_BG_STEREO,
      },{
            .name          = "PAL-D/K2 FM-stereo",
            .std           = V4L2_STD_PAL_DK,
            .carr1         = 6500,
            .carr2         = 6742,
            .mode          = TVAUDIO_FM_BG_STEREO,
      },{
            .name          = "PAL-D/K3 FM-stereo",
            .std           = V4L2_STD_PAL_DK,
            .carr1         = 6500,
            .carr2         = 5742,
            .mode          = TVAUDIO_FM_BG_STEREO,
      },{
            .name          = "PAL-B/G NICAM",
            .std           = V4L2_STD_PAL_BG,
            .carr1         = 5500,
            .carr2         = 5850,
            .mode          = TVAUDIO_NICAM_FM,
      },{
            .name          = "PAL-I NICAM",
            .std           = V4L2_STD_PAL_I,
            .carr1         = 6000,
            .carr2         = 6552,
            .mode          = TVAUDIO_NICAM_FM,
      },{
            .name          = "PAL-D/K NICAM",
            .std           = V4L2_STD_PAL_DK,
            .carr1         = 6500,
            .carr2         = 5850,
            .mode          = TVAUDIO_NICAM_FM,
      },{
            .name          = "SECAM-L NICAM",
            .std           = V4L2_STD_SECAM_L,
            .carr1         = 6500,
            .carr2         = 5850,
            .mode          = TVAUDIO_NICAM_AM,
      },{
            .name          = "SECAM-D/K NICAM",
            .std           = V4L2_STD_SECAM_DK,
            .carr1         = 6500,
            .carr2         = 5850,
            .mode          = TVAUDIO_NICAM_FM,
      },{
            .name          = "NTSC-A2 FM-stereo",
            .std           = V4L2_STD_NTSC,
            .carr1         = 4500,
            .carr2         = 4724,
            .mode          = TVAUDIO_FM_K_STEREO,
      },{
            .name          = "NTSC-M",
            .std           = V4L2_STD_NTSC,
            .carr1         = 4500,
            .carr2         = -1,
            .mode          = TVAUDIO_FM_MONO,
      }
};
#define TVAUDIO (sizeof(tvaudio)/sizeof(struct saa7134_tvaudio))

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

static void tvaudio_init(struct saa7134_dev *dev)
{
      int clock = saa7134_boards[dev->board].audio_clock;

      if (UNSET != audio_clock_override)
            clock = audio_clock_override;

      /* init all audio registers */
      saa_writeb(SAA7134_AUDIO_PLL_CTRL,   0x00);
      if (need_resched())
            schedule();
      else
            udelay(10);

      saa_writeb(SAA7134_AUDIO_CLOCK0,      clock        & 0xff);
      saa_writeb(SAA7134_AUDIO_CLOCK1,     (clock >>  8) & 0xff);
      saa_writeb(SAA7134_AUDIO_CLOCK2,     (clock >> 16) & 0xff);
      /* frame locked audio is mandatory for NICAM */
      saa_writeb(SAA7134_AUDIO_PLL_CTRL,   0x01);

      saa_writeb(SAA7134_NICAM_ERROR_LOW,  0x14);
      saa_writeb(SAA7134_NICAM_ERROR_HIGH, 0x50);
      saa_writeb(SAA7134_MONITOR_SELECT,   0xa0);
      saa_writeb(SAA7134_FM_DEMATRIX,      0x80);
}

static u32 tvaudio_carr2reg(u32 carrier)
{
      u64 a = carrier;

      a <<= 24;
      do_div(a,12288);
      return a;
}

static void tvaudio_setcarrier(struct saa7134_dev *dev,
                         int primary, int secondary)
{
      if (-1 == secondary)
            secondary = primary;
      saa_writel(SAA7134_CARRIER1_FREQ0 >> 2, tvaudio_carr2reg(primary));
      saa_writel(SAA7134_CARRIER2_FREQ0 >> 2, tvaudio_carr2reg(secondary));
}

#define SAA7134_MUTE_MASK 0xbb
#define SAA7134_MUTE_ANALOG 0x04
#define SAA7134_MUTE_I2S 0x40

static void mute_input_7134(struct saa7134_dev *dev)
{
      unsigned int mute;
      struct saa7134_input *in;
      int ausel=0, ics=0, ocs=0;
      int mask;

      /* look what is to do ... */
      in   = dev->input;
      mute = (dev->ctl_mute ||
            (dev->automute  &&  (&card(dev).radio) != in));
      if (card(dev).mute.name) {
            /*
             * 7130 - we'll mute using some unconnected audio input
             * 7134 - we'll probably should switch external mux with gpio
             */
            if (mute)
                  in = &card(dev).mute;
      }

      if (dev->hw_mute  == mute &&
            dev->hw_input == in && !dev->insuspend) {
            dprintk("mute/input: nothing to do [mute=%d,input=%s]\n",
                  mute,in->name);
            return;
      }

      dprintk("ctl_mute=%d automute=%d input=%s  =>  mute=%d input=%s\n",
            dev->ctl_mute,dev->automute,dev->input->name,mute,in->name);
      dev->hw_mute  = mute;
      dev->hw_input = in;

      if (PCI_DEVICE_ID_PHILIPS_SAA7134 == dev->pci->device)
            /* 7134 mute */
            saa_writeb(SAA7134_AUDIO_MUTE_CTRL, mute ?
                                        SAA7134_MUTE_MASK |
                                        SAA7134_MUTE_ANALOG |
                                        SAA7134_MUTE_I2S :
                                        SAA7134_MUTE_MASK);

      /* switch internal audio mux */
      switch (in->amux) {
      case TV:         ausel=0xc0; ics=0x00; ocs=0x02; break;
      case LINE1:      ausel=0x80; ics=0x00; ocs=0x00; break;
      case LINE2:      ausel=0x80; ics=0x08; ocs=0x01; break;
      case LINE2_LEFT: ausel=0x80; ics=0x08; ocs=0x05; break;
      }
      saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, ausel);
      saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x08, ics);
      saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x07, ocs);
      // for oss, we need to change the clock configuration
      if (in->amux == TV)
            saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x00);
      else
            saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x01);

      /* switch gpio-connected external audio mux */
      if (0 == card(dev).gpiomask)
            return;

      mask = card(dev).gpiomask;
      saa_andorl(SAA7134_GPIO_GPMODE0 >> 2,   mask, mask);
      saa_andorl(SAA7134_GPIO_GPSTATUS0 >> 2, mask, in->gpio);
      saa7134_track_gpio(dev,in->name);
}

static void tvaudio_setmode(struct saa7134_dev *dev,
                      struct saa7134_tvaudio *audio,
                      char *note)
{
      int acpf, tweak = 0;

      if (dev->tvnorm->id == V4L2_STD_NTSC) {
            acpf = 0x19066;
      } else {
            acpf = 0x1e000;
      }
      if (audio_clock_tweak > -1024 && audio_clock_tweak < 1024)
            tweak = audio_clock_tweak;

      if (note)
            dprintk("tvaudio_setmode: %s %s [%d.%03d/%d.%03d MHz] acpf=%d%+d\n",
                  note,audio->name,
                  audio->carr1 / 1000, audio->carr1 % 1000,
                  audio->carr2 / 1000, audio->carr2 % 1000,
                  acpf, tweak);

      acpf += tweak;
      saa_writeb(SAA7134_AUDIO_CLOCKS_PER_FIELD0, (acpf & 0x0000ff) >> 0);
      saa_writeb(SAA7134_AUDIO_CLOCKS_PER_FIELD1, (acpf & 0x00ff00) >> 8);
      saa_writeb(SAA7134_AUDIO_CLOCKS_PER_FIELD2, (acpf & 0x030000) >> 16);
      tvaudio_setcarrier(dev,audio->carr1,audio->carr2);

      switch (audio->mode) {
      case TVAUDIO_FM_MONO:
      case TVAUDIO_FM_BG_STEREO:
            saa_writeb(SAA7134_DEMODULATOR,               0x00);
            saa_writeb(SAA7134_DCXO_IDENT_CTRL,           0x00);
            saa_writeb(SAA7134_FM_DEEMPHASIS,             0x22);
            saa_writeb(SAA7134_FM_DEMATRIX,               0x80);
            saa_writeb(SAA7134_STEREO_DAC_OUTPUT_SELECT,  0xa0);
            break;
      case TVAUDIO_FM_K_STEREO:
            saa_writeb(SAA7134_DEMODULATOR,               0x00);
            saa_writeb(SAA7134_DCXO_IDENT_CTRL,           0x01);
            saa_writeb(SAA7134_FM_DEEMPHASIS,             0x22);
            saa_writeb(SAA7134_FM_DEMATRIX,               0x80);
            saa_writeb(SAA7134_STEREO_DAC_OUTPUT_SELECT,  0xa0);
            break;
      case TVAUDIO_NICAM_FM:
            saa_writeb(SAA7134_DEMODULATOR,               0x10);
            saa_writeb(SAA7134_DCXO_IDENT_CTRL,           0x00);
            saa_writeb(SAA7134_FM_DEEMPHASIS,             0x44);
            saa_writeb(SAA7134_STEREO_DAC_OUTPUT_SELECT,  0xa1);
            saa_writeb(SAA7134_NICAM_CONFIG,              0x00);
            break;
      case TVAUDIO_NICAM_AM:
            saa_writeb(SAA7134_DEMODULATOR,               0x12);
            saa_writeb(SAA7134_DCXO_IDENT_CTRL,           0x00);
            saa_writeb(SAA7134_FM_DEEMPHASIS,             0x44);
            saa_writeb(SAA7134_STEREO_DAC_OUTPUT_SELECT,  0xa1);
            saa_writeb(SAA7134_NICAM_CONFIG,              0x00);
            break;
      case TVAUDIO_FM_SAT_STEREO:
            /* not implemented (yet) */
            break;
      }
}

static int tvaudio_sleep(struct saa7134_dev *dev, int timeout)
{
      if (dev->thread.scan1 == dev->thread.scan2 &&
          !kthread_should_stop()) {
            if (timeout < 0) {
                  set_current_state(TASK_INTERRUPTIBLE);
                  schedule();
            } else {
                  schedule_timeout_interruptible
                                    (msecs_to_jiffies(timeout));
            }
      }
      return dev->thread.scan1 != dev->thread.scan2;
}

static int tvaudio_checkcarrier(struct saa7134_dev *dev, struct mainscan *scan)
{
      __s32 left,right,value;

      if (audio_debug > 1) {
            int i;
            dprintk("debug %d:",scan->carr);
            for (i = -150; i <= 150; i += 30) {
                  tvaudio_setcarrier(dev,scan->carr+i,scan->carr+i);
                  saa_readl(SAA7134_LEVEL_READOUT1 >> 2);
                  if (tvaudio_sleep(dev,SCAN_SAMPLE_DELAY))
                        return -1;
                  value = saa_readl(SAA7134_LEVEL_READOUT1 >> 2);
                  if (0 == i)
                        printk("  #  %6d  # ",value >> 16);
                  else
                        printk(" %6d",value >> 16);
            }
            printk("\n");
      }
      if (dev->tvnorm->id & scan->std) {
            tvaudio_setcarrier(dev,scan->carr-90,scan->carr-90);
            saa_readl(SAA7134_LEVEL_READOUT1 >> 2);
            if (tvaudio_sleep(dev,SCAN_SAMPLE_DELAY))
                  return -1;
            left = saa_readl(SAA7134_LEVEL_READOUT1 >> 2);

            tvaudio_setcarrier(dev,scan->carr+90,scan->carr+90);
            saa_readl(SAA7134_LEVEL_READOUT1 >> 2);
            if (tvaudio_sleep(dev,SCAN_SAMPLE_DELAY))
                  return -1;
            right = saa_readl(SAA7134_LEVEL_READOUT1 >> 2);

            left >>= 16;
            right >>= 16;
            value = left > right ? left - right : right - left;
            dprintk("scanning %d.%03d MHz [%4s] =>  dc is %5d [%d/%d]\n",
                  scan->carr / 1000, scan->carr % 1000,
                  scan->name, value, left, right);
      } else {
            value = 0;
            dprintk("skipping %d.%03d MHz [%4s]\n",
                  scan->carr / 1000, scan->carr % 1000, scan->name);
      }
      return value;
}


static int tvaudio_getstereo(struct saa7134_dev *dev, struct saa7134_tvaudio *audio)
{
      __u32 idp, nicam, nicam_status;
      int retval = -1;

      switch (audio->mode) {
      case TVAUDIO_FM_MONO:
            return V4L2_TUNER_SUB_MONO;
      case TVAUDIO_FM_K_STEREO:
      case TVAUDIO_FM_BG_STEREO:
            idp = (saa_readb(SAA7134_IDENT_SIF) & 0xe0) >> 5;
            dprintk("getstereo: fm/stereo: idp=0x%x\n",idp);
            if (0x03 == (idp & 0x03))
                  retval = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
            else if (0x05 == (idp & 0x05))
                  retval = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
            else if (0x01 == (idp & 0x01))
                  retval = V4L2_TUNER_SUB_MONO;
            break;
      case TVAUDIO_FM_SAT_STEREO:
            /* not implemented (yet) */
            break;
      case TVAUDIO_NICAM_FM:
      case TVAUDIO_NICAM_AM:
            nicam = saa_readb(SAA7134_AUDIO_STATUS);
            dprintk("getstereo: nicam=0x%x\n",nicam);
            if (nicam & 0x1) {
                  nicam_status = saa_readb(SAA7134_NICAM_STATUS);
                  dprintk("getstereo: nicam_status=0x%x\n", nicam_status);

                  switch (nicam_status & 0x03) {
                      case 0x01:
                        retval = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
                        break;
                      case 0x02:
                        retval = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
                        break;
                      default:
                        retval = V4L2_TUNER_SUB_MONO;
                  }
            } else {
                  /* No nicam detected */
            }
            break;
      }
      if (retval != -1)
            dprintk("found audio subchannels:%s%s%s%s\n",
                  (retval & V4L2_TUNER_SUB_MONO)   ? " mono"   : "",
                  (retval & V4L2_TUNER_SUB_STEREO) ? " stereo" : "",
                  (retval & V4L2_TUNER_SUB_LANG1)  ? " lang1"  : "",
                  (retval & V4L2_TUNER_SUB_LANG2)  ? " lang2"  : "");
      return retval;
}

static int tvaudio_setstereo(struct saa7134_dev *dev, struct saa7134_tvaudio *audio,
                       u32 mode)
{
      static char *name[] = {
            [ V4L2_TUNER_MODE_MONO   ] = "mono",
            [ V4L2_TUNER_MODE_STEREO ] = "stereo",
            [ V4L2_TUNER_MODE_LANG1  ] = "lang1",
            [ V4L2_TUNER_MODE_LANG2  ] = "lang2",
            [ V4L2_TUNER_MODE_LANG1_LANG2  ] = "lang1+lang2",
      };
      static u32 fm[] = {
            [ V4L2_TUNER_MODE_MONO   ] = 0x00,  /* ch1  */
            [ V4L2_TUNER_MODE_STEREO ] = 0x80,  /* auto */
            [ V4L2_TUNER_MODE_LANG1  ] = 0x00,  /* ch1  */
            [ V4L2_TUNER_MODE_LANG2  ] = 0x01,  /* ch2  */
            [ V4L2_TUNER_MODE_LANG1_LANG2 ] = 0x80,  /* auto */
      };
      u32 reg;

      switch (audio->mode) {
      case TVAUDIO_FM_MONO:
            /* nothing to do ... */
            break;
      case TVAUDIO_FM_K_STEREO:
      case TVAUDIO_FM_BG_STEREO:
      case TVAUDIO_NICAM_AM:
      case TVAUDIO_NICAM_FM:
            dprintk("setstereo [fm] => %s\n",
                  name[ mode % ARRAY_SIZE(name) ]);
            reg = fm[ mode % ARRAY_SIZE(fm) ];
            saa_writeb(SAA7134_FM_DEMATRIX, reg);
            break;
      case TVAUDIO_FM_SAT_STEREO:
            /* Not implemented */
            break;
      }
      return 0;
}

static int tvaudio_thread(void *data)
{
      struct saa7134_dev *dev = data;
      int carr_vals[ARRAY_SIZE(mainscan)];
      unsigned int i, audio, nscan;
      int max1,max2,carrier,rx,mode,lastmode,default_carrier;


      set_freezable();

      for (;;) {
            tvaudio_sleep(dev,-1);
            if (kthread_should_stop())
                  goto done;

      restart:
            try_to_freeze();

            dev->thread.scan1 = dev->thread.scan2;
            dprintk("tvaudio thread scan start [%d]\n",dev->thread.scan1);
            dev->tvaudio  = NULL;
            tvaudio_init(dev);
            if (dev->ctl_automute)
                  dev->automute = 1;
            mute_input_7134(dev);

            /* give the tuner some time */
            if (tvaudio_sleep(dev,SCAN_INITIAL_DELAY))
                  goto restart;

            max1 = 0;
            max2 = 0;
            nscan = 0;
            carrier = 0;
            default_carrier = 0;
            for (i = 0; i < ARRAY_SIZE(mainscan); i++) {
                  if (!(dev->tvnorm->id & mainscan[i].std))
                        continue;
                  if (!default_carrier)
                        default_carrier = mainscan[i].carr;
                  nscan++;
            }

            if (1 == nscan) {
                  /* only one candidate -- skip scan ;) */
                  dprintk("only one main carrier candidate - skipping scan\n");
                  max1 = 12345;
                  carrier = default_carrier;
            } else {
                  /* scan for the main carrier */
                  saa_writeb(SAA7134_MONITOR_SELECT,0x00);
                  tvaudio_setmode(dev,&tvaudio[0],NULL);
                  for (i = 0; i < ARRAY_SIZE(mainscan); i++) {
                        carr_vals[i] = tvaudio_checkcarrier(dev, mainscan+i);
                        if (dev->thread.scan1 != dev->thread.scan2)
                              goto restart;
                  }
                  for (max1 = 0, max2 = 0, i = 0; i < ARRAY_SIZE(mainscan); i++) {
                        if (max1 < carr_vals[i]) {
                              max2 = max1;
                              max1 = carr_vals[i];
                              carrier = mainscan[i].carr;
                        } else if (max2 < carr_vals[i]) {
                              max2 = carr_vals[i];
                        }
                  }
            }

            if (0 != carrier && max1 > 2000 && max1 > max2*3) {
                  /* found good carrier */
                  dprintk("found %s main sound carrier @ %d.%03d MHz [%d/%d]\n",
                        dev->tvnorm->name, carrier/1000, carrier%1000,
                        max1, max2);
                  dev->last_carrier = carrier;

            } else if (0 != dev->last_carrier) {
                  /* no carrier -- try last detected one as fallback */
                  carrier = dev->last_carrier;
                  dprintk(KERN_WARNING "%s/audio: audio carrier scan failed, "
                         "using %d.%03d MHz [last detected]\n",
                         dev->name, carrier/1000, carrier%1000);

            } else {
                  /* no carrier + no fallback -- use default */
                  carrier = default_carrier;
                  dprintk(KERN_WARNING "%s/audio: audio carrier scan failed, "
                         "using %d.%03d MHz [default]\n",
                         dev->name, carrier/1000, carrier%1000);
            }
            tvaudio_setcarrier(dev,carrier,carrier);
            dev->automute = 0;
            saa_andorb(SAA7134_STEREO_DAC_OUTPUT_SELECT, 0x30, 0x00);
            saa7134_tvaudio_setmute(dev);
            /* find the exact tv audio norm */
            for (audio = UNSET, i = 0; i < TVAUDIO; i++) {
                  if (dev->tvnorm->id != UNSET &&
                        !(dev->tvnorm->id & tvaudio[i].std))
                        continue;
                  if (tvaudio[i].carr1 != carrier)
                        continue;
                  /* Note: at least the primary carrier is right here */
                  if (UNSET == audio)
                        audio = i;
                  tvaudio_setmode(dev,&tvaudio[i],"trying");
                  if (tvaudio_sleep(dev,SCAN_SUBCARRIER_DELAY))
                        goto restart;
                  if (-1 != tvaudio_getstereo(dev,&tvaudio[i])) {
                        audio = i;
                        break;
                  }
            }
            saa_andorb(SAA7134_STEREO_DAC_OUTPUT_SELECT, 0x30, 0x30);
            if (UNSET == audio)
                  continue;
            tvaudio_setmode(dev,&tvaudio[audio],"using");

            tvaudio_setstereo(dev,&tvaudio[audio],V4L2_TUNER_MODE_MONO);
            dev->tvaudio = &tvaudio[audio];

            lastmode = 42;
            for (;;) {

                  try_to_freeze();

                  if (tvaudio_sleep(dev,5000))
                        goto restart;
                  if (kthread_should_stop())
                        break;
                  if (UNSET == dev->thread.mode) {
                        rx = tvaudio_getstereo(dev,&tvaudio[i]);
                        mode = saa7134_tvaudio_rx2mode(rx);
                  } else {
                        mode = dev->thread.mode;
                  }
                  if (lastmode != mode) {
                        tvaudio_setstereo(dev,&tvaudio[audio],mode);
                        lastmode = mode;
                  }
            }
      }

 done:
      dev->thread.stopped = 1;
      return 0;
}

/* ------------------------------------------------------------------ */
/* saa7133 / saa7135 code                                             */

static char *stdres[0x20] = {
      [0x00] = "no standard detected",
      [0x01] = "B/G (in progress)",
      [0x02] = "D/K (in progress)",
      [0x03] = "M (in progress)",

      [0x04] = "B/G A2",
      [0x05] = "B/G NICAM",
      [0x06] = "D/K A2 (1)",
      [0x07] = "D/K A2 (2)",
      [0x08] = "D/K A2 (3)",
      [0x09] = "D/K NICAM",
      [0x0a] = "L NICAM",
      [0x0b] = "I NICAM",

      [0x0c] = "M Korea",
      [0x0d] = "M BTSC ",
      [0x0e] = "M EIAJ",

      [0x0f] = "FM radio / IF 10.7 / 50 deemp",
      [0x10] = "FM radio / IF 10.7 / 75 deemp",
      [0x11] = "FM radio / IF sel / 50 deemp",
      [0x12] = "FM radio / IF sel / 75 deemp",

      [0x13 ... 0x1e ] = "unknown",
      [0x1f] = "??? [in progress]",
};

#define DSP_RETRY 32
#define DSP_DELAY 16

static inline int saa_dsp_wait_bit(struct saa7134_dev *dev, int bit)
{
      int state, count = DSP_RETRY;

      state = saa_readb(SAA7135_DSP_RWSTATE);
      if (unlikely(state & SAA7135_DSP_RWSTATE_ERR)) {
            printk("%s: dsp access error\n",dev->name);
            /* FIXME: send ack ... */
            return -EIO;
      }
      while (0 == (state & bit)) {
            if (unlikely(0 == count)) {
                  printk("%s: dsp access wait timeout [bit=%s]\n",
                         dev->name,
                         (bit & SAA7135_DSP_RWSTATE_WRR) ? "WRR" :
                         (bit & SAA7135_DSP_RWSTATE_RDB) ? "RDB" :
                         (bit & SAA7135_DSP_RWSTATE_IDA) ? "IDA" :
                         "???");
                  return -EIO;
            }
            saa_wait(DSP_DELAY);
            state = saa_readb(SAA7135_DSP_RWSTATE);
            count--;
      }
      return 0;
}


int saa_dsp_writel(struct saa7134_dev *dev, int reg, u32 value)
{
      int err;

      d2printk("dsp write reg 0x%x = 0x%06x\n",reg<<2,value);
      err = saa_dsp_wait_bit(dev,SAA7135_DSP_RWSTATE_WRR);
      if (err < 0)
            return err;
      saa_writel(reg,value);
      err = saa_dsp_wait_bit(dev,SAA7135_DSP_RWSTATE_WRR);
      if (err < 0)
            return err;
      return 0;
}

static int getstereo_7133(struct saa7134_dev *dev)
{
      int retval = V4L2_TUNER_SUB_MONO;
      u32 value;

      value = saa_readl(0x528 >> 2);
      if (value & 0x20)
            retval = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
      if (value & 0x40)
            retval = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
      return retval;
}

static int mute_input_7133(struct saa7134_dev *dev)
{
      u32 reg = 0;
      u32 xbarin, xbarout;
      int mask;
      struct saa7134_input *in;

      xbarin = 0x03;
      switch (dev->input->amux) {
      case TV:
            reg = 0x02;
            xbarin = 0;
            break;
      case LINE1:
            reg = 0x00;
            break;
      case LINE2:
      case LINE2_LEFT:
            reg = 0x09;
            break;
      }
      saa_dsp_writel(dev, 0x464 >> 2, xbarin);
      if (dev->ctl_mute) {
            reg = 0x07;
            xbarout = 0xbbbbbb;
      } else
            xbarout = 0xbbbb10;
      saa_dsp_writel(dev, 0x46c >> 2, xbarout);

      saa_writel(0x594 >> 2, reg);


      /* switch gpio-connected external audio mux */
      if (0 != card(dev).gpiomask) {
            mask = card(dev).gpiomask;

            if (card(dev).mute.name && dev->ctl_mute)
                  in = &card(dev).mute;
            else
                  in = dev->input;

            saa_andorl(SAA7134_GPIO_GPMODE0 >> 2,   mask, mask);
            saa_andorl(SAA7134_GPIO_GPSTATUS0 >> 2, mask, in->gpio);
            saa7134_track_gpio(dev,in->name);
      }

      return 0;
}

static int tvaudio_thread_ddep(void *data)
{
      struct saa7134_dev *dev = data;
      u32 value, norms, clock;


      set_freezable();

      clock = saa7134_boards[dev->board].audio_clock;
      if (UNSET != audio_clock_override)
            clock = audio_clock_override;
      saa_writel(0x598 >> 2, clock);

      /* unmute */
      saa_dsp_writel(dev, 0x474 >> 2, 0x00);
      saa_dsp_writel(dev, 0x450 >> 2, 0x00);

      for (;;) {
            tvaudio_sleep(dev,-1);
            if (kthread_should_stop())
                  goto done;

      restart:

            try_to_freeze();

            dev->thread.scan1 = dev->thread.scan2;
            dprintk("tvaudio thread scan start [%d]\n",dev->thread.scan1);

            if (audio_ddep >= 0x04 && audio_ddep <= 0x0e) {
                  /* insmod option override */
                  norms = (audio_ddep << 2) | 0x01;
                  dprintk("ddep override: %s\n",stdres[audio_ddep]);
            } else if (&card(dev).radio == dev->input) {
                  dprintk("FM Radio\n");
                  if (dev->tuner_type == TUNER_PHILIPS_TDA8290) {
                        norms = (0x11 << 2) | 0x01;
                        saa_dsp_writel(dev, 0x42c >> 2, 0x729555);
                  } else {
                        norms = (0x0f << 2) | 0x01;
                  }
            } else {
                  /* (let chip) scan for sound carrier */
                  norms = 0;
                  if (dev->tvnorm->id & (V4L2_STD_B | V4L2_STD_GH))
                        norms |= 0x04;
                  if (dev->tvnorm->id & V4L2_STD_PAL_I)
                        norms |= 0x20;
                  if (dev->tvnorm->id & V4L2_STD_DK)
                        norms |= 0x08;
                  if (dev->tvnorm->id & V4L2_STD_MN)
                        norms |= 0x40;
                  if (dev->tvnorm->id & (V4L2_STD_SECAM_L | V4L2_STD_SECAM_LC))
                        norms |= 0x10;
                  if (0 == norms)
                        norms = 0x7c; /* all */
                  dprintk("scanning:%s%s%s%s%s\n",
                        (norms & 0x04) ? " B/G"  : "",
                        (norms & 0x08) ? " D/K"  : "",
                        (norms & 0x10) ? " L/L'" : "",
                        (norms & 0x20) ? " I"    : "",
                        (norms & 0x40) ? " M"    : "");
            }

            /* kick automatic standard detection */
            saa_dsp_writel(dev, 0x454 >> 2, 0);
            saa_dsp_writel(dev, 0x454 >> 2, norms | 0x80);

            /* setup crossbars */
            saa_dsp_writel(dev, 0x464 >> 2, 0x000000);
            saa_dsp_writel(dev, 0x470 >> 2, 0x101010);

            if (tvaudio_sleep(dev,3000))
                  goto restart;
            value = saa_readl(0x528 >> 2) & 0xffffff;

            dprintk("tvaudio thread status: 0x%x [%s%s%s]\n",
                  value, stdres[value & 0x1f],
                  (value & 0x000020) ? ",stereo" : "",
                  (value & 0x000040) ? ",dual"   : "");
            dprintk("detailed status: "
                  "%s#%s#%s#%s#%s#%s#%s#%s#%s#%s#%s#%s#%s#%s\n",
                  (value & 0x000080) ? " A2/EIAJ pilot tone "     : "",
                  (value & 0x000100) ? " A2/EIAJ dual "           : "",
                  (value & 0x000200) ? " A2/EIAJ stereo "         : "",
                  (value & 0x000400) ? " A2/EIAJ noise mute "     : "",

                  (value & 0x000800) ? " BTSC/FM radio pilot "    : "",
                  (value & 0x001000) ? " SAP carrier "            : "",
                  (value & 0x002000) ? " BTSC stereo noise mute " : "",
                  (value & 0x004000) ? " SAP noise mute "         : "",
                  (value & 0x008000) ? " VDSP "                   : "",

                  (value & 0x010000) ? " NICST "                  : "",
                  (value & 0x020000) ? " NICDU "                  : "",
                  (value & 0x040000) ? " NICAM muted "            : "",
                  (value & 0x080000) ? " NICAM reserve sound "    : "",

                  (value & 0x100000) ? " init done "              : "");
      }

 done:
      dev->thread.stopped = 1;
      return 0;
}

/* ------------------------------------------------------------------ */
/* common stuff + external entry points                               */

void saa7134_enable_i2s(struct saa7134_dev *dev)
{
      int i2s_format;

      if (!card_is_empress(dev))
            return;
      i2s_format = (dev->input->amux == TV) ? 0x00 : 0x01;

      /* enable I2S audio output for the mpeg encoder */
      saa_writeb(SAA7134_I2S_OUTPUT_SELECT,  0x80);
      saa_writeb(SAA7134_I2S_OUTPUT_FORMAT,  i2s_format);
      saa_writeb(SAA7134_I2S_OUTPUT_LEVEL,   0x0F);
      saa_writeb(SAA7134_I2S_AUDIO_OUTPUT,   0x01);
}

int saa7134_tvaudio_rx2mode(u32 rx)
{
      u32 mode;

      mode = V4L2_TUNER_MODE_MONO;
      if (rx & V4L2_TUNER_SUB_STEREO)
            mode = V4L2_TUNER_MODE_STEREO;
      else if (rx & V4L2_TUNER_SUB_LANG1)
            mode = V4L2_TUNER_MODE_LANG1;
      else if (rx & V4L2_TUNER_SUB_LANG2)
            mode = V4L2_TUNER_MODE_LANG2;
      return mode;
}

void saa7134_tvaudio_setmute(struct saa7134_dev *dev)
{
      switch (dev->pci->device) {
      case PCI_DEVICE_ID_PHILIPS_SAA7130:
      case PCI_DEVICE_ID_PHILIPS_SAA7134:
            mute_input_7134(dev);
            break;
      case PCI_DEVICE_ID_PHILIPS_SAA7133:
      case PCI_DEVICE_ID_PHILIPS_SAA7135:
            mute_input_7133(dev);
            break;
      }
}

void saa7134_tvaudio_setinput(struct saa7134_dev *dev,
                        struct saa7134_input *in)
{
      dev->input = in;
      switch (dev->pci->device) {
      case PCI_DEVICE_ID_PHILIPS_SAA7130:
      case PCI_DEVICE_ID_PHILIPS_SAA7134:
            mute_input_7134(dev);
            break;
      case PCI_DEVICE_ID_PHILIPS_SAA7133:
      case PCI_DEVICE_ID_PHILIPS_SAA7135:
            mute_input_7133(dev);
            break;
      }
      saa7134_enable_i2s(dev);
}

void saa7134_tvaudio_setvolume(struct saa7134_dev *dev, int level)
{
      switch (dev->pci->device) {
      case PCI_DEVICE_ID_PHILIPS_SAA7134:
            saa_writeb(SAA7134_CHANNEL1_LEVEL,     level & 0x1f);
            saa_writeb(SAA7134_CHANNEL2_LEVEL,     level & 0x1f);
            saa_writeb(SAA7134_NICAM_LEVEL_ADJUST, level & 0x1f);
            break;
      }
}

int saa7134_tvaudio_getstereo(struct saa7134_dev *dev)
{
      int retval = V4L2_TUNER_SUB_MONO;

      switch (dev->pci->device) {
      case PCI_DEVICE_ID_PHILIPS_SAA7134:
            if (dev->tvaudio)
                  retval = tvaudio_getstereo(dev,dev->tvaudio);
            break;
      case PCI_DEVICE_ID_PHILIPS_SAA7133:
      case PCI_DEVICE_ID_PHILIPS_SAA7135:
            retval = getstereo_7133(dev);
            break;
      }
      return retval;
}

int saa7134_tvaudio_init2(struct saa7134_dev *dev)
{
      int (*my_thread)(void *data) = NULL;

      switch (dev->pci->device) {
      case PCI_DEVICE_ID_PHILIPS_SAA7134:
            my_thread = tvaudio_thread;
            break;
      case PCI_DEVICE_ID_PHILIPS_SAA7133:
      case PCI_DEVICE_ID_PHILIPS_SAA7135:
            my_thread = tvaudio_thread_ddep;
            break;
      }

      dev->thread.thread = NULL;
      if (my_thread) {
            /* start tvaudio thread */
            dev->thread.thread = kthread_run(my_thread, dev, "%s", dev->name);
            if (IS_ERR(dev->thread.thread)) {
                  printk(KERN_WARNING "%s: kernel_thread() failed\n",
                         dev->name);
                  /* XXX: missing error handling here */
            }
            saa7134_tvaudio_do_scan(dev);
      }

      saa7134_enable_i2s(dev);
      return 0;
}

int saa7134_tvaudio_fini(struct saa7134_dev *dev)
{
      /* shutdown tvaudio thread */
      if (dev->thread.thread && !dev->thread.stopped)
            kthread_stop(dev->thread.thread);

      saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x07, 0x00); /* LINE1 */
      return 0;
}

int saa7134_tvaudio_do_scan(struct saa7134_dev *dev)
{
      if (dev->input->amux != TV) {
            dprintk("sound IF not in use, skipping scan\n");
            dev->automute = 0;
            saa7134_tvaudio_setmute(dev);
      } else if (dev->thread.thread) {
            dev->thread.mode = UNSET;
            dev->thread.scan2++;

            if (!dev->insuspend && !dev->thread.stopped)
                  wake_up_process(dev->thread.thread);
      } else {
            dev->automute = 0;
            saa7134_tvaudio_setmute(dev);
      }
      return 0;
}

EXPORT_SYMBOL(saa_dsp_writel);
EXPORT_SYMBOL(saa7134_tvaudio_setmute);

/* ----------------------------------------------------------- */
/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */

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