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tvaudio.c

/*
 * experimental driver for simple i2c audio chips.
 *
 * Copyright (c) 2000 Gerd Knorr
 * based on code by:
 *   Eric Sandeen (eric_sandeen@bigfoot.com)
 *   Steve VanDeBogart (vandebo@uclink.berkeley.edu)
 *   Greg Alexander (galexand@acm.org)
 *
 * This code is placed under the terms of the GNU General Public License
 *
 * OPTIONS:
 *   debug - set to 1 if you'd like to see debug messages
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/videodev.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/kthread.h>
#include <linux/freezer.h>

#include <media/tvaudio.h>
#include <media/v4l2-common.h>
#include <media/v4l2-chip-ident.h>

#include <media/i2c-addr.h>

/* ---------------------------------------------------------------------- */
/* insmod args                                                            */

static int debug = 0;   /* insmod parameter */
module_param(debug, int, 0644);

MODULE_DESCRIPTION("device driver for various i2c TV sound decoder / audiomux chips");
MODULE_AUTHOR("Eric Sandeen, Steve VanDeBogart, Greg Alexander, Gerd Knorr");
MODULE_LICENSE("GPL");

#define UNSET    (-1U)

/* ---------------------------------------------------------------------- */
/* our structs                                                            */

#define MAXREGS 64

struct CHIPSTATE;
typedef int  (*getvalue)(int);
typedef int  (*checkit)(struct CHIPSTATE*);
typedef int  (*initialize)(struct CHIPSTATE*);
typedef int  (*getmode)(struct CHIPSTATE*);
typedef void (*setmode)(struct CHIPSTATE*, int mode);
typedef void (*checkmode)(struct CHIPSTATE*);

/* i2c command */
typedef struct AUDIOCMD {
      int             count;             /* # of bytes to send */
      unsigned char   bytes[MAXREGS+1];  /* addr, data, data, ... */
} audiocmd;

/* chip description */
struct CHIPDESC {
      char       *name;             /* chip name         */
      int        id;                /* ID */
      int        addr_lo, addr_hi;  /* i2c address range */
      int        registers;         /* # of registers    */

      int        *insmodopt;
      checkit    checkit;
      initialize initialize;
      int        flags;
#define CHIP_HAS_VOLUME      1
#define CHIP_HAS_BASSTREBLE  2
#define CHIP_HAS_INPUTSEL    4

      /* various i2c command sequences */
      audiocmd   init;

      /* which register has which value */
      int    leftreg,rightreg,treblereg,bassreg;

      /* initialize with (defaults to 65535/65535/32768/32768 */
      int    leftinit,rightinit,trebleinit,bassinit;

      /* functions to convert the values (v4l -> chip) */
      getvalue volfunc,treblefunc,bassfunc;

      /* get/set mode */
      getmode  getmode;
      setmode  setmode;

      /* check / autoswitch audio after channel switches */
      checkmode  checkmode;

      /* input switch register + values for v4l inputs */
      int  inputreg;
      int  inputmap[4];
      int  inputmute;
      int  inputmask;
};
static struct CHIPDESC chiplist[];

/* current state of the chip */
struct CHIPSTATE {
      struct i2c_client c;

      /* index into CHIPDESC array */
      int type;

      /* shadow register set */
      audiocmd   shadow;

      /* current settings */
      __u16 left,right,treble,bass,muted,mode;
      int prevmode;
      int radio;
      int input;

      /* thread */
      struct task_struct   *thread;
      struct timer_list    wt;
      int                  watch_stereo;
      int              audmode;
};

/* ---------------------------------------------------------------------- */
/* i2c addresses                                                          */

static unsigned short normal_i2c[] = {
      I2C_ADDR_TDA8425   >> 1,
      I2C_ADDR_TEA6300   >> 1,
      I2C_ADDR_TEA6420   >> 1,
      I2C_ADDR_TDA9840   >> 1,
      I2C_ADDR_TDA985x_L >> 1,
      I2C_ADDR_TDA985x_H >> 1,
      I2C_ADDR_TDA9874   >> 1,
      I2C_ADDR_PIC16C54  >> 1,
      I2C_CLIENT_END };
I2C_CLIENT_INSMOD;

static struct i2c_driver driver;
static struct i2c_client client_template;


/* ---------------------------------------------------------------------- */
/* i2c I/O functions                                                      */

static int chip_write(struct CHIPSTATE *chip, int subaddr, int val)
{
      unsigned char buffer[2];

      if (-1 == subaddr) {
            v4l_dbg(1, debug, &chip->c, "%s: chip_write: 0x%x\n",
                  chip->c.name, val);
            chip->shadow.bytes[1] = val;
            buffer[0] = val;
            if (1 != i2c_master_send(&chip->c,buffer,1)) {
                  v4l_warn(&chip->c, "%s: I/O error (write 0x%x)\n",
                        chip->c.name, val);
                  return -1;
            }
      } else {
            v4l_dbg(1, debug, &chip->c, "%s: chip_write: reg%d=0x%x\n",
                  chip->c.name, subaddr, val);
            chip->shadow.bytes[subaddr+1] = val;
            buffer[0] = subaddr;
            buffer[1] = val;
            if (2 != i2c_master_send(&chip->c,buffer,2)) {
                  v4l_warn(&chip->c, "%s: I/O error (write reg%d=0x%x)\n",
                  chip->c.name, subaddr, val);
                  return -1;
            }
      }
      return 0;
}

static int chip_write_masked(struct CHIPSTATE *chip, int subaddr, int val, int mask)
{
      if (mask != 0) {
            if (-1 == subaddr) {
                  val = (chip->shadow.bytes[1] & ~mask) | (val & mask);
            } else {
                  val = (chip->shadow.bytes[subaddr+1] & ~mask) | (val & mask);
            }
      }
      return chip_write(chip, subaddr, val);
}

static int chip_read(struct CHIPSTATE *chip)
{
      unsigned char buffer;

      if (1 != i2c_master_recv(&chip->c,&buffer,1)) {
            v4l_warn(&chip->c, "%s: I/O error (read)\n",
            chip->c.name);
            return -1;
      }
      v4l_dbg(1, debug, &chip->c, "%s: chip_read: 0x%x\n",chip->c.name, buffer);
      return buffer;
}

static int chip_read2(struct CHIPSTATE *chip, int subaddr)
{
      unsigned char write[1];
      unsigned char read[1];
      struct i2c_msg msgs[2] = {
            { chip->c.addr, 0,        1, write },
            { chip->c.addr, I2C_M_RD, 1, read  }
      };
      write[0] = subaddr;

      if (2 != i2c_transfer(chip->c.adapter,msgs,2)) {
            v4l_warn(&chip->c, "%s: I/O error (read2)\n", chip->c.name);
            return -1;
      }
      v4l_dbg(1, debug, &chip->c, "%s: chip_read2: reg%d=0x%x\n",
            chip->c.name, subaddr,read[0]);
      return read[0];
}

static int chip_cmd(struct CHIPSTATE *chip, char *name, audiocmd *cmd)
{
      int i;

      if (0 == cmd->count)
            return 0;

      /* update our shadow register set; print bytes if (debug > 0) */
      v4l_dbg(1, debug, &chip->c, "%s: chip_cmd(%s): reg=%d, data:",
            chip->c.name, name,cmd->bytes[0]);
      for (i = 1; i < cmd->count; i++) {
            if (debug)
                  printk(" 0x%x",cmd->bytes[i]);
            chip->shadow.bytes[i+cmd->bytes[0]] = cmd->bytes[i];
      }
      if (debug)
            printk("\n");

      /* send data to the chip */
      if (cmd->count != i2c_master_send(&chip->c,cmd->bytes,cmd->count)) {
            v4l_warn(&chip->c, "%s: I/O error (%s)\n", chip->c.name, name);
            return -1;
      }
      return 0;
}

/* ---------------------------------------------------------------------- */
/* kernel thread for doing i2c stuff asyncronly
 *   right now it is used only to check the audio mode (mono/stereo/whatever)
 *   some time after switching to another TV channel, then turn on stereo
 *   if available, ...
 */

static void chip_thread_wake(unsigned long data)
{
      struct CHIPSTATE *chip = (struct CHIPSTATE*)data;
      wake_up_process(chip->thread);
}

static int chip_thread(void *data)
{
      struct CHIPSTATE *chip = data;
      struct CHIPDESC  *desc = chiplist + chip->type;

      v4l_dbg(1, debug, &chip->c, "%s: thread started\n", chip->c.name);
      set_freezable();
      for (;;) {
            set_current_state(TASK_INTERRUPTIBLE);
            if (!kthread_should_stop())
                  schedule();
            set_current_state(TASK_RUNNING);
            try_to_freeze();
            if (kthread_should_stop())
                  break;
            v4l_dbg(1, debug, &chip->c, "%s: thread wakeup\n", chip->c.name);

            /* don't do anything for radio or if mode != auto */
            if (chip->radio || chip->mode != 0)
                  continue;

            /* have a look what's going on */
            desc->checkmode(chip);

            /* schedule next check */
            mod_timer(&chip->wt, jiffies+msecs_to_jiffies(2000));
      }

      v4l_dbg(1, debug, &chip->c, "%s: thread exiting\n", chip->c.name);
      return 0;
}

static void generic_checkmode(struct CHIPSTATE *chip)
{
      struct CHIPDESC  *desc = chiplist + chip->type;
      int mode = desc->getmode(chip);

      if (mode == chip->prevmode)
      return;

      v4l_dbg(1, debug, &chip->c, "%s: thread checkmode\n", chip->c.name);
      chip->prevmode = mode;

      if (mode & VIDEO_SOUND_STEREO)
            desc->setmode(chip,VIDEO_SOUND_STEREO);
      else if (mode & VIDEO_SOUND_LANG1)
            desc->setmode(chip,VIDEO_SOUND_LANG1);
      else if (mode & VIDEO_SOUND_LANG2)
            desc->setmode(chip,VIDEO_SOUND_LANG2);
      else
            desc->setmode(chip,VIDEO_SOUND_MONO);
}

/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for tda9840                */

#define TDA9840_SW         0x00
#define TDA9840_LVADJ      0x02
#define TDA9840_STADJ      0x03
#define TDA9840_TEST       0x04

#define TDA9840_MONO       0x10
#define TDA9840_STEREO     0x2a
#define TDA9840_DUALA      0x12
#define TDA9840_DUALB      0x1e
#define TDA9840_DUALAB     0x1a
#define TDA9840_DUALBA     0x16
#define TDA9840_EXTERNAL   0x7a

#define TDA9840_DS_DUAL    0x20 /* Dual sound identified          */
#define TDA9840_ST_STEREO  0x40 /* Stereo sound identified        */
#define TDA9840_PONRES     0x80 /* Power-on reset detected if = 1 */

#define TDA9840_TEST_INT1SN 0x1 /* Integration time 0.5s when set */
#define TDA9840_TEST_INTFU 0x02 /* Disables integrator function */

static int tda9840_getmode(struct CHIPSTATE *chip)
{
      int val, mode;

      val = chip_read(chip);
      mode = VIDEO_SOUND_MONO;
      if (val & TDA9840_DS_DUAL)
            mode |= VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
      if (val & TDA9840_ST_STEREO)
            mode |= VIDEO_SOUND_STEREO;

      v4l_dbg(1, debug, &chip->c, "tda9840_getmode(): raw chip read: %d, return: %d\n",
            val, mode);
      return mode;
}

static void tda9840_setmode(struct CHIPSTATE *chip, int mode)
{
      int update = 1;
      int t = chip->shadow.bytes[TDA9840_SW + 1] & ~0x7e;

      switch (mode) {
      case VIDEO_SOUND_MONO:
            t |= TDA9840_MONO;
            break;
      case VIDEO_SOUND_STEREO:
            t |= TDA9840_STEREO;
            break;
      case VIDEO_SOUND_LANG1:
            t |= TDA9840_DUALA;
            break;
      case VIDEO_SOUND_LANG2:
            t |= TDA9840_DUALB;
            break;
      default:
            update = 0;
      }

      if (update)
            chip_write(chip, TDA9840_SW, t);
}

static int tda9840_checkit(struct CHIPSTATE *chip)
{
      int rc;
      rc = chip_read(chip);
      /* lower 5 bits should be 0 */
      return ((rc & 0x1f) == 0) ? 1 : 0;
}

/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for tda985x                */

/* subaddresses for TDA9855 */
#define TDA9855_VR      0x00 /* Volume, right */
#define TDA9855_VL      0x01 /* Volume, left */
#define TDA9855_BA      0x02 /* Bass */
#define TDA9855_TR      0x03 /* Treble */
#define TDA9855_SW      0x04 /* Subwoofer - not connected on DTV2000 */

/* subaddresses for TDA9850 */
#define TDA9850_C4      0x04 /* Control 1 for TDA9850 */

/* subaddesses for both chips */
#define TDA985x_C5      0x05 /* Control 2 for TDA9850, Control 1 for TDA9855 */
#define TDA985x_C6      0x06 /* Control 3 for TDA9850, Control 2 for TDA9855 */
#define TDA985x_C7      0x07 /* Control 4 for TDA9850, Control 3 for TDA9855 */
#define TDA985x_A1      0x08 /* Alignment 1 for both chips */
#define TDA985x_A2      0x09 /* Alignment 2 for both chips */
#define TDA985x_A3      0x0a /* Alignment 3 for both chips */

/* Masks for bits in TDA9855 subaddresses */
/* 0x00 - VR in TDA9855 */
/* 0x01 - VL in TDA9855 */
/* lower 7 bits control gain from -71dB (0x28) to 16dB (0x7f)
 * in 1dB steps - mute is 0x27 */


/* 0x02 - BA in TDA9855 */
/* lower 5 bits control bass gain from -12dB (0x06) to 16.5dB (0x19)
 * in .5dB steps - 0 is 0x0E */


/* 0x03 - TR in TDA9855 */
/* 4 bits << 1 control treble gain from -12dB (0x3) to 12dB (0xb)
 * in 3dB steps - 0 is 0x7 */

/* Masks for bits in both chips' subaddresses */
/* 0x04 - SW in TDA9855, C4/Control 1 in TDA9850 */
/* Unique to TDA9855: */
/* 4 bits << 2 control subwoofer/surround gain from -14db (0x1) to 14db (0xf)
 * in 3dB steps - mute is 0x0 */

/* Unique to TDA9850: */
/* lower 4 bits control stereo noise threshold, over which stereo turns off
 * set to values of 0x00 through 0x0f for Ster1 through Ster16 */


/* 0x05 - C5 - Control 1 in TDA9855 , Control 2 in TDA9850*/
/* Unique to TDA9855: */
#define TDA9855_MUTE    1<<7 /* GMU, Mute at outputs */
#define TDA9855_AVL     1<<6 /* AVL, Automatic Volume Level */
#define TDA9855_LOUD    1<<5 /* Loudness, 1==off */
#define TDA9855_SUR     1<<3 /* Surround / Subwoofer 1==.5(L-R) 0==.5(L+R) */
                       /* Bits 0 to 3 select various combinations
                        * of line in and line out, only the
                        * interesting ones are defined */
#define TDA9855_EXT     1<<2 /* Selects inputs LIR and LIL.  Pins 41 & 12 */
#define TDA9855_INT     0    /* Selects inputs LOR and LOL.  (internal) */

/* Unique to TDA9850:  */
/* lower 4 bits contol SAP noise threshold, over which SAP turns off
 * set to values of 0x00 through 0x0f for SAP1 through SAP16 */


/* 0x06 - C6 - Control 2 in TDA9855, Control 3 in TDA9850 */
/* Common to TDA9855 and TDA9850: */
#define TDA985x_SAP     3<<6 /* Selects SAP output, mute if not received */
#define TDA985x_STEREO  1<<6 /* Selects Stereo ouput, mono if not received */
#define TDA985x_MONO    0    /* Forces Mono output */
#define TDA985x_LMU     1<<3 /* Mute (LOR/LOL for 9855, OUTL/OUTR for 9850) */

/* Unique to TDA9855: */
#define TDA9855_TZCM    1<<5 /* If set, don't mute till zero crossing */
#define TDA9855_VZCM    1<<4 /* If set, don't change volume till zero crossing*/
#define TDA9855_LINEAR  0    /* Linear Stereo */
#define TDA9855_PSEUDO  1    /* Pseudo Stereo */
#define TDA9855_SPAT_30 2    /* Spatial Stereo, 30% anti-phase crosstalk */
#define TDA9855_SPAT_50 3    /* Spatial Stereo, 52% anti-phase crosstalk */
#define TDA9855_E_MONO  7    /* Forced mono - mono select elseware, so useless*/

/* 0x07 - C7 - Control 3 in TDA9855, Control 4 in TDA9850 */
/* Common to both TDA9855 and TDA9850: */
/* lower 4 bits control input gain from -3.5dB (0x0) to 4dB (0xF)
 * in .5dB steps -  0dB is 0x7 */

/* 0x08, 0x09 - A1 and A2 (read/write) */
/* Common to both TDA9855 and TDA9850: */
/* lower 5 bites are wideband and spectral expander alignment
 * from 0x00 to 0x1f - nominal at 0x0f and 0x10 (read/write) */
#define TDA985x_STP     1<<5 /* Stereo Pilot/detect (read-only) */
#define TDA985x_SAPP    1<<6 /* SAP Pilot/detect (read-only) */
#define TDA985x_STS     1<<7 /* Stereo trigger 1= <35mV 0= <30mV (write-only)*/

/* 0x0a - A3 */
/* Common to both TDA9855 and TDA9850: */
/* lower 3 bits control timing current for alignment: -30% (0x0), -20% (0x1),
 * -10% (0x2), nominal (0x3), +10% (0x6), +20% (0x5), +30% (0x4) */
#define TDA985x_ADJ     1<<7 /* Stereo adjust on/off (wideband and spectral */

static int tda9855_volume(int val) { return val/0x2e8+0x27; }
static int tda9855_bass(int val)   { return val/0xccc+0x06; }
static int tda9855_treble(int val) { return (val/0x1c71+0x3)<<1; }

static int  tda985x_getmode(struct CHIPSTATE *chip)
{
      int mode;

      mode = ((TDA985x_STP | TDA985x_SAPP) &
            chip_read(chip)) >> 4;
      /* Add mono mode regardless of SAP and stereo */
      /* Allows forced mono */
      return mode | VIDEO_SOUND_MONO;
}

static void tda985x_setmode(struct CHIPSTATE *chip, int mode)
{
      int update = 1;
      int c6 = chip->shadow.bytes[TDA985x_C6+1] & 0x3f;

      switch (mode) {
      case VIDEO_SOUND_MONO:
            c6 |= TDA985x_MONO;
            break;
      case VIDEO_SOUND_STEREO:
            c6 |= TDA985x_STEREO;
            break;
      case VIDEO_SOUND_LANG1:
            c6 |= TDA985x_SAP;
            break;
      default:
            update = 0;
      }
      if (update)
            chip_write(chip,TDA985x_C6,c6);
}


/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for tda9873h               */

/* Subaddresses for TDA9873H */

#define TDA9873_SW      0x00 /* Switching                    */
#define TDA9873_AD      0x01 /* Adjust                       */
#define TDA9873_PT      0x02 /* Port                         */

/* Subaddress 0x00: Switching Data
 * B7..B0:
 *
 * B1, B0: Input source selection
 *  0,  0  internal
 *  1,  0  external stereo
 *  0,  1  external mono
 */
#define TDA9873_INP_MASK    3
#define TDA9873_INTERNAL    0
#define TDA9873_EXT_STEREO  2
#define TDA9873_EXT_MONO    1

/*    B3, B2: output signal select
 * B4    : transmission mode
 *  0, 0, 1   Mono
 *  1, 0, 0   Stereo
 *  1, 1, 1   Stereo (reversed channel)
 *  0, 0, 0   Dual AB
 *  0, 0, 1   Dual AA
 *  0, 1, 0   Dual BB
 *  0, 1, 1   Dual BA
 */

#define TDA9873_TR_MASK     (7 << 2)
#define TDA9873_TR_MONO     4
#define TDA9873_TR_STEREO   1 << 4
#define TDA9873_TR_REVERSE  (1 << 3) & (1 << 2)
#define TDA9873_TR_DUALA    1 << 2
#define TDA9873_TR_DUALB    1 << 3

/* output level controls
 * B5:  output level switch (0 = reduced gain, 1 = normal gain)
 * B6:  mute                (1 = muted)
 * B7:  auto-mute           (1 = auto-mute enabled)
 */

#define TDA9873_GAIN_NORMAL 1 << 5
#define TDA9873_MUTE        1 << 6
#define TDA9873_AUTOMUTE    1 << 7

/* Subaddress 0x01:  Adjust/standard */

/* Lower 4 bits (C3..C0) control stereo adjustment on R channel (-0.6 - +0.7 dB)
 * Recommended value is +0 dB
 */

#define     TDA9873_STEREO_ADJ      0x06 /* 0dB gain */

/* Bits C6..C4 control FM stantard
 * C6, C5, C4
 *  0,  0,  0   B/G (PAL FM)
 *  0,  0,  1   M
 *  0,  1,  0   D/K(1)
 *  0,  1,  1   D/K(2)
 *  1,  0,  0   D/K(3)
 *  1,  0,  1   I
 */
#define TDA9873_BG            0
#define TDA9873_M       1
#define TDA9873_DK1     2
#define TDA9873_DK2     3
#define TDA9873_DK3     4
#define TDA9873_I       5

/* C7 controls identification response time (1=fast/0=normal)
 */
#define TDA9873_IDR_NORM 0
#define TDA9873_IDR_FAST 1 << 7


/* Subaddress 0x02: Port data */

/* E1, E0   free programmable ports P1/P2
    0,  0   both ports low
    0,  1   P1 high
    1,  0   P2 high
    1,  1   both ports high
*/

#define TDA9873_PORTS    3

/* E2: test port */
#define TDA9873_TST_PORT 1 << 2

/* E5..E3 control mono output channel (together with transmission mode bit B4)
 *
 * E5 E4 E3 B4     OUTM
 *  0  0  0  0     mono
 *  0  0  1  0     DUAL B
 *  0  1  0  1     mono (from stereo decoder)
 */
#define TDA9873_MOUT_MONO   0
#define TDA9873_MOUT_FMONO  0
#define TDA9873_MOUT_DUALA  0
#define TDA9873_MOUT_DUALB  1 << 3
#define TDA9873_MOUT_ST     1 << 4
#define TDA9873_MOUT_EXTM   (1 << 4 ) & (1 << 3)
#define TDA9873_MOUT_EXTL   1 << 5
#define TDA9873_MOUT_EXTR   (1 << 5 ) & (1 << 3)
#define TDA9873_MOUT_EXTLR  (1 << 5 ) & (1 << 4)
#define TDA9873_MOUT_MUTE   (1 << 5 ) & (1 << 4) & (1 << 3)

/* Status bits: (chip read) */
#define TDA9873_PONR        0 /* Power-on reset detected if = 1 */
#define TDA9873_STEREO      2 /* Stereo sound is identified     */
#define TDA9873_DUAL        4 /* Dual sound is identified       */

static int tda9873_getmode(struct CHIPSTATE *chip)
{
      int val,mode;

      val = chip_read(chip);
      mode = VIDEO_SOUND_MONO;
      if (val & TDA9873_STEREO)
            mode |= VIDEO_SOUND_STEREO;
      if (val & TDA9873_DUAL)
            mode |= VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
      v4l_dbg(1, debug, &chip->c, "tda9873_getmode(): raw chip read: %d, return: %d\n",
            val, mode);
      return mode;
}

static void tda9873_setmode(struct CHIPSTATE *chip, int mode)
{
      int sw_data  = chip->shadow.bytes[TDA9873_SW+1] & ~ TDA9873_TR_MASK;
      /*    int adj_data = chip->shadow.bytes[TDA9873_AD+1] ; */

      if ((sw_data & TDA9873_INP_MASK) != TDA9873_INTERNAL) {
            v4l_dbg(1, debug, &chip->c, "tda9873_setmode(): external input\n");
            return;
      }

      v4l_dbg(1, debug, &chip->c, "tda9873_setmode(): chip->shadow.bytes[%d] = %d\n", TDA9873_SW+1, chip->shadow.bytes[TDA9873_SW+1]);
      v4l_dbg(1, debug, &chip->c, "tda9873_setmode(): sw_data  = %d\n", sw_data);

      switch (mode) {
      case VIDEO_SOUND_MONO:
            sw_data |= TDA9873_TR_MONO;
            break;
      case VIDEO_SOUND_STEREO:
            sw_data |= TDA9873_TR_STEREO;
            break;
      case VIDEO_SOUND_LANG1:
            sw_data |= TDA9873_TR_DUALA;
            break;
      case VIDEO_SOUND_LANG2:
            sw_data |= TDA9873_TR_DUALB;
            break;
      default:
            chip->mode = 0;
            return;
      }

      chip_write(chip, TDA9873_SW, sw_data);
      v4l_dbg(1, debug, &chip->c, "tda9873_setmode(): req. mode %d; chip_write: %d\n",
            mode, sw_data);
}

static int tda9873_checkit(struct CHIPSTATE *chip)
{
      int rc;

      if (-1 == (rc = chip_read2(chip,254)))
            return 0;
      return (rc & ~0x1f) == 0x80;
}


/* ---------------------------------------------------------------------- */
/* audio chip description - defines+functions for tda9874h and tda9874a   */
/* Dariusz Kowalewski <darekk@automex.pl>                                 */

/* Subaddresses for TDA9874H and TDA9874A (slave rx) */
#define TDA9874A_AGCGR        0x00  /* AGC gain */
#define TDA9874A_GCONR        0x01  /* general config */
#define TDA9874A_MSR          0x02  /* monitor select */
#define TDA9874A_C1FRA        0x03  /* carrier 1 freq. */
#define TDA9874A_C1FRB        0x04  /* carrier 1 freq. */
#define TDA9874A_C1FRC        0x05  /* carrier 1 freq. */
#define TDA9874A_C2FRA        0x06  /* carrier 2 freq. */
#define TDA9874A_C2FRB        0x07  /* carrier 2 freq. */
#define TDA9874A_C2FRC        0x08  /* carrier 2 freq. */
#define TDA9874A_DCR          0x09  /* demodulator config */
#define TDA9874A_FMER         0x0a  /* FM de-emphasis */
#define TDA9874A_FMMR         0x0b  /* FM dematrix */
#define TDA9874A_C1OLAR       0x0c  /* ch.1 output level adj. */
#define TDA9874A_C2OLAR       0x0d  /* ch.2 output level adj. */
#define TDA9874A_NCONR        0x0e  /* NICAM config */
#define TDA9874A_NOLAR        0x0f  /* NICAM output level adj. */
#define TDA9874A_NLELR        0x10  /* NICAM lower error limit */
#define TDA9874A_NUELR        0x11  /* NICAM upper error limit */
#define TDA9874A_AMCONR       0x12  /* audio mute control */
#define TDA9874A_SDACOSR      0x13  /* stereo DAC output select */
#define TDA9874A_AOSR         0x14  /* analog output select */
#define TDA9874A_DAICONR      0x15  /* digital audio interface config */
#define TDA9874A_I2SOSR       0x16  /* I2S-bus output select */
#define TDA9874A_I2SOLAR      0x17  /* I2S-bus output level adj. */
#define TDA9874A_MDACOSR      0x18  /* mono DAC output select (tda9874a) */
#define TDA9874A_ESP          0xFF  /* easy standard progr. (tda9874a) */

/* Subaddresses for TDA9874H and TDA9874A (slave tx) */
#define TDA9874A_DSR          0x00  /* device status */
#define TDA9874A_NSR          0x01  /* NICAM status */
#define TDA9874A_NECR         0x02  /* NICAM error count */
#define TDA9874A_DR1          0x03  /* add. data LSB */
#define TDA9874A_DR2          0x04  /* add. data MSB */
#define TDA9874A_LLRA         0x05  /* monitor level read-out LSB */
#define TDA9874A_LLRB         0x06  /* monitor level read-out MSB */
#define TDA9874A_SIFLR        0x07  /* SIF level */
#define TDA9874A_TR2          252   /* test reg. 2 */
#define TDA9874A_TR1          253   /* test reg. 1 */
#define TDA9874A_DIC          254   /* device id. code */
#define TDA9874A_SIC          255   /* software id. code */


static int tda9874a_mode = 1;       /* 0: A2, 1: NICAM */
static int tda9874a_GCONR = 0xc0;   /* default config. input pin: SIFSEL=0 */
static int tda9874a_NCONR = 0x01;   /* default NICAM config.: AMSEL=0,AMUTE=1 */
static int tda9874a_ESP = 0x07;           /* default standard: NICAM D/K */
static int tda9874a_dic = -1;       /* device id. code */

/* insmod options for tda9874a */
static unsigned int tda9874a_SIF   = UNSET;
static unsigned int tda9874a_AMSEL = UNSET;
static unsigned int tda9874a_STD   = UNSET;
module_param(tda9874a_SIF, int, 0444);
module_param(tda9874a_AMSEL, int, 0444);
module_param(tda9874a_STD, int, 0444);

/*
 * initialization table for tda9874 decoder:
 *  - carrier 1 freq. registers (3 bytes)
 *  - carrier 2 freq. registers (3 bytes)
 *  - demudulator config register
 *  - FM de-emphasis register (slow identification mode)
 * Note: frequency registers must be written in single i2c transfer.
 */
static struct tda9874a_MODES {
      char *name;
      audiocmd cmd;
} tda9874a_modelist[9] = {
  {   "A2, B/G",
      { 9, { TDA9874A_C1FRA, 0x72,0x95,0x55, 0x77,0xA0,0x00, 0x00,0x00 }} },
  {   "A2, M (Korea)",
      { 9, { TDA9874A_C1FRA, 0x5D,0xC0,0x00, 0x62,0x6A,0xAA, 0x20,0x22 }} },
  {   "A2, D/K (1)",
      { 9, { TDA9874A_C1FRA, 0x87,0x6A,0xAA, 0x82,0x60,0x00, 0x00,0x00 }} },
  {   "A2, D/K (2)",
      { 9, { TDA9874A_C1FRA, 0x87,0x6A,0xAA, 0x8C,0x75,0x55, 0x00,0x00 }} },
  {   "A2, D/K (3)",
      { 9, { TDA9874A_C1FRA, 0x87,0x6A,0xAA, 0x77,0xA0,0x00, 0x00,0x00 }} },
  {   "NICAM, I",
      { 9, { TDA9874A_C1FRA, 0x7D,0x00,0x00, 0x88,0x8A,0xAA, 0x08,0x33 }} },
  {   "NICAM, B/G",
      { 9, { TDA9874A_C1FRA, 0x72,0x95,0x55, 0x79,0xEA,0xAA, 0x08,0x33 }} },
  {   "NICAM, D/K", /* default */
      { 9, { TDA9874A_C1FRA, 0x87,0x6A,0xAA, 0x79,0xEA,0xAA, 0x08,0x33 }} },
  {   "NICAM, L",
      { 9, { TDA9874A_C1FRA, 0x87,0x6A,0xAA, 0x79,0xEA,0xAA, 0x09,0x33 }} }
};

static int tda9874a_setup(struct CHIPSTATE *chip)
{
      chip_write(chip, TDA9874A_AGCGR, 0x00); /* 0 dB */
      chip_write(chip, TDA9874A_GCONR, tda9874a_GCONR);
      chip_write(chip, TDA9874A_MSR, (tda9874a_mode) ? 0x03:0x02);
      if(tda9874a_dic == 0x11) {
            chip_write(chip, TDA9874A_FMMR, 0x80);
      } else { /* dic == 0x07 */
            chip_cmd(chip,"tda9874_modelist",&tda9874a_modelist[tda9874a_STD].cmd);
            chip_write(chip, TDA9874A_FMMR, 0x00);
      }
      chip_write(chip, TDA9874A_C1OLAR, 0x00); /* 0 dB */
      chip_write(chip, TDA9874A_C2OLAR, 0x00); /* 0 dB */
      chip_write(chip, TDA9874A_NCONR, tda9874a_NCONR);
      chip_write(chip, TDA9874A_NOLAR, 0x00); /* 0 dB */
      /* Note: If signal quality is poor you may want to change NICAM */
      /* error limit registers (NLELR and NUELR) to some greater values. */
      /* Then the sound would remain stereo, but won't be so clear. */
      chip_write(chip, TDA9874A_NLELR, 0x14); /* default */
      chip_write(chip, TDA9874A_NUELR, 0x50); /* default */

      if(tda9874a_dic == 0x11) {
            chip_write(chip, TDA9874A_AMCONR, 0xf9);
            chip_write(chip, TDA9874A_SDACOSR, (tda9874a_mode) ? 0x81:0x80);
            chip_write(chip, TDA9874A_AOSR, 0x80);
            chip_write(chip, TDA9874A_MDACOSR, (tda9874a_mode) ? 0x82:0x80);
            chip_write(chip, TDA9874A_ESP, tda9874a_ESP);
      } else { /* dic == 0x07 */
            chip_write(chip, TDA9874A_AMCONR, 0xfb);
            chip_write(chip, TDA9874A_SDACOSR, (tda9874a_mode) ? 0x81:0x80);
            chip_write(chip, TDA9874A_AOSR, 0x00); /* or 0x10 */
      }
      v4l_dbg(1, debug, &chip->c, "tda9874a_setup(): %s [0x%02X].\n",
            tda9874a_modelist[tda9874a_STD].name,tda9874a_STD);
      return 1;
}

static int tda9874a_getmode(struct CHIPSTATE *chip)
{
      int dsr,nsr,mode;
      int necr; /* just for debugging */

      mode = VIDEO_SOUND_MONO;

      if(-1 == (dsr = chip_read2(chip,TDA9874A_DSR)))
            return mode;
      if(-1 == (nsr = chip_read2(chip,TDA9874A_NSR)))
            return mode;
      if(-1 == (necr = chip_read2(chip,TDA9874A_NECR)))
            return mode;

      /* need to store dsr/nsr somewhere */
      chip->shadow.bytes[MAXREGS-2] = dsr;
      chip->shadow.bytes[MAXREGS-1] = nsr;

      if(tda9874a_mode) {
            /* Note: DSR.RSSF and DSR.AMSTAT bits are also checked.
             * If NICAM auto-muting is enabled, DSR.AMSTAT=1 indicates
             * that sound has (temporarily) switched from NICAM to
             * mono FM (or AM) on 1st sound carrier due to high NICAM bit
             * error count. So in fact there is no stereo in this case :-(
             * But changing the mode to VIDEO_SOUND_MONO would switch
             * external 4052 multiplexer in audio_hook().
             */
            if(nsr & 0x02) /* NSR.S/MB=1 */
                  mode |= VIDEO_SOUND_STEREO;
            if(nsr & 0x01) /* NSR.D/SB=1 */
                  mode |= VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
      } else {
            if(dsr & 0x02) /* DSR.IDSTE=1 */
                  mode |= VIDEO_SOUND_STEREO;
            if(dsr & 0x04) /* DSR.IDDUA=1 */
                  mode |= VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
      }

      v4l_dbg(1, debug, &chip->c, "tda9874a_getmode(): DSR=0x%X, NSR=0x%X, NECR=0x%X, return: %d.\n",
             dsr, nsr, necr, mode);
      return mode;
}

static void tda9874a_setmode(struct CHIPSTATE *chip, int mode)
{
      /* Disable/enable NICAM auto-muting (based on DSR.RSSF status bit). */
      /* If auto-muting is disabled, we can hear a signal of degrading quality. */
      if(tda9874a_mode) {
            if(chip->shadow.bytes[MAXREGS-2] & 0x20) /* DSR.RSSF=1 */
                  tda9874a_NCONR &= 0xfe; /* enable */
            else
                  tda9874a_NCONR |= 0x01; /* disable */
            chip_write(chip, TDA9874A_NCONR, tda9874a_NCONR);
      }

      /* Note: TDA9874A supports automatic FM dematrixing (FMMR register)
       * and has auto-select function for audio output (AOSR register).
       * Old TDA9874H doesn't support these features.
       * TDA9874A also has additional mono output pin (OUTM), which
       * on same (all?) tv-cards is not used, anyway (as well as MONOIN).
       */
      if(tda9874a_dic == 0x11) {
            int aosr = 0x80;
            int mdacosr = (tda9874a_mode) ? 0x82:0x80;

            switch(mode) {
            case VIDEO_SOUND_MONO:
            case VIDEO_SOUND_STEREO:
                  break;
            case VIDEO_SOUND_LANG1:
                  aosr = 0x80; /* auto-select, dual A/A */
                  mdacosr = (tda9874a_mode) ? 0x82:0x80;
                  break;
            case VIDEO_SOUND_LANG2:
                  aosr = 0xa0; /* auto-select, dual B/B */
                  mdacosr = (tda9874a_mode) ? 0x83:0x81;
                  break;
            default:
                  chip->mode = 0;
                  return;
            }
            chip_write(chip, TDA9874A_AOSR, aosr);
            chip_write(chip, TDA9874A_MDACOSR, mdacosr);

            v4l_dbg(1, debug, &chip->c, "tda9874a_setmode(): req. mode %d; AOSR=0x%X, MDACOSR=0x%X.\n",
                  mode, aosr, mdacosr);

      } else { /* dic == 0x07 */
            int fmmr,aosr;

            switch(mode) {
            case VIDEO_SOUND_MONO:
                  fmmr = 0x00; /* mono */
                  aosr = 0x10; /* A/A */
                  break;
            case VIDEO_SOUND_STEREO:
                  if(tda9874a_mode) {
                        fmmr = 0x00;
                        aosr = 0x00; /* handled by NICAM auto-mute */
                  } else {
                        fmmr = (tda9874a_ESP == 1) ? 0x05 : 0x04; /* stereo */
                        aosr = 0x00;
                  }
                  break;
            case VIDEO_SOUND_LANG1:
                  fmmr = 0x02; /* dual */
                  aosr = 0x10; /* dual A/A */
                  break;
            case VIDEO_SOUND_LANG2:
                  fmmr = 0x02; /* dual */
                  aosr = 0x20; /* dual B/B */
                  break;
            default:
                  chip->mode = 0;
                  return;
            }
            chip_write(chip, TDA9874A_FMMR, fmmr);
            chip_write(chip, TDA9874A_AOSR, aosr);

            v4l_dbg(1, debug, &chip->c, "tda9874a_setmode(): req. mode %d; FMMR=0x%X, AOSR=0x%X.\n",
                  mode, fmmr, aosr);
      }
}

static int tda9874a_checkit(struct CHIPSTATE *chip)
{
      int dic,sic;      /* device id. and software id. codes */

      if(-1 == (dic = chip_read2(chip,TDA9874A_DIC)))
            return 0;
      if(-1 == (sic = chip_read2(chip,TDA9874A_SIC)))
            return 0;

      v4l_dbg(1, debug, &chip->c, "tda9874a_checkit(): DIC=0x%X, SIC=0x%X.\n", dic, sic);

      if((dic == 0x11)||(dic == 0x07)) {
            v4l_info(&chip->c, "found tda9874%s.\n", (dic == 0x11) ? "a":"h");
            tda9874a_dic = dic;     /* remember device id. */
            return 1;
      }
      return 0;   /* not found */
}

static int tda9874a_initialize(struct CHIPSTATE *chip)
{
      if (tda9874a_SIF > 2)
            tda9874a_SIF = 1;
      if (tda9874a_STD > 8)
            tda9874a_STD = 0;
      if(tda9874a_AMSEL > 1)
            tda9874a_AMSEL = 0;

      if(tda9874a_SIF == 1)
            tda9874a_GCONR = 0xc0;  /* sound IF input 1 */
      else
            tda9874a_GCONR = 0xc1;  /* sound IF input 2 */

      tda9874a_ESP = tda9874a_STD;
      tda9874a_mode = (tda9874a_STD < 5) ? 0 : 1;

      if(tda9874a_AMSEL == 0)
            tda9874a_NCONR = 0x01; /* auto-mute: analog mono input */
      else
            tda9874a_NCONR = 0x05; /* auto-mute: 1st carrier FM or AM */

      tda9874a_setup(chip);
      return 0;
}


/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for tea6420                */

#define TEA6300_VL         0x00  /* volume left */
#define TEA6300_VR         0x01  /* volume right */
#define TEA6300_BA         0x02  /* bass */
#define TEA6300_TR         0x03  /* treble */
#define TEA6300_FA         0x04  /* fader control */
#define TEA6300_S          0x05  /* switch register */
                         /* values for those registers: */
#define TEA6300_S_SA       0x01  /* stereo A input */
#define TEA6300_S_SB       0x02  /* stereo B */
#define TEA6300_S_SC       0x04  /* stereo C */
#define TEA6300_S_GMU      0x80  /* general mute */

#define TEA6320_V          0x00  /* volume (0-5)/loudness off (6)/zero crossing mute(7) */
#define TEA6320_FFR        0x01  /* fader front right (0-5) */
#define TEA6320_FFL        0x02  /* fader front left (0-5) */
#define TEA6320_FRR        0x03  /* fader rear right (0-5) */
#define TEA6320_FRL        0x04  /* fader rear left (0-5) */
#define TEA6320_BA         0x05  /* bass (0-4) */
#define TEA6320_TR         0x06  /* treble (0-4) */
#define TEA6320_S          0x07  /* switch register */
                         /* values for those registers: */
#define TEA6320_S_SA       0x07  /* stereo A input */
#define TEA6320_S_SB       0x06  /* stereo B */
#define TEA6320_S_SC       0x05  /* stereo C */
#define TEA6320_S_SD       0x04  /* stereo D */
#define TEA6320_S_GMU      0x80  /* general mute */

#define TEA6420_S_SA       0x00  /* stereo A input */
#define TEA6420_S_SB       0x01  /* stereo B */
#define TEA6420_S_SC       0x02  /* stereo C */
#define TEA6420_S_SD       0x03  /* stereo D */
#define TEA6420_S_SE       0x04  /* stereo E */
#define TEA6420_S_GMU      0x05  /* general mute */

static int tea6300_shift10(int val) { return val >> 10; }
static int tea6300_shift12(int val) { return val >> 12; }

/* Assumes 16bit input (values 0x3f to 0x0c are unique, values less than */
/* 0x0c mirror those immediately higher) */
static int tea6320_volume(int val) { return (val / (65535/(63-12)) + 12) & 0x3f; }
static int tea6320_shift11(int val) { return val >> 11; }
static int tea6320_initialize(struct CHIPSTATE * chip)
{
      chip_write(chip, TEA6320_FFR, 0x3f);
      chip_write(chip, TEA6320_FFL, 0x3f);
      chip_write(chip, TEA6320_FRR, 0x3f);
      chip_write(chip, TEA6320_FRL, 0x3f);

      return 0;
}


/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for tda8425                */

#define TDA8425_VL         0x00  /* volume left */
#define TDA8425_VR         0x01  /* volume right */
#define TDA8425_BA         0x02  /* bass */
#define TDA8425_TR         0x03  /* treble */
#define TDA8425_S1         0x08  /* switch functions */
                         /* values for those registers: */
#define TDA8425_S1_OFF     0xEE  /* audio off (mute on) */
#define TDA8425_S1_CH1     0xCE  /* audio channel 1 (mute off) - "linear stereo" mode */
#define TDA8425_S1_CH2     0xCF  /* audio channel 2 (mute off) - "linear stereo" mode */
#define TDA8425_S1_MU      0x20  /* mute bit */
#define TDA8425_S1_STEREO  0x18  /* stereo bits */
#define TDA8425_S1_STEREO_SPATIAL 0x18 /* spatial stereo */
#define TDA8425_S1_STEREO_LINEAR  0x08 /* linear stereo */
#define TDA8425_S1_STEREO_PSEUDO  0x10 /* pseudo stereo */
#define TDA8425_S1_STEREO_MONO    0x00 /* forced mono */
#define TDA8425_S1_ML      0x06        /* language selector */
#define TDA8425_S1_ML_SOUND_A 0x02     /* sound a */
#define TDA8425_S1_ML_SOUND_B 0x04     /* sound b */
#define TDA8425_S1_ML_STEREO  0x06     /* stereo */
#define TDA8425_S1_IS      0x01        /* channel selector */


static int tda8425_shift10(int val) { return (val >> 10) | 0xc0; }
static int tda8425_shift12(int val) { return (val >> 12) | 0xf0; }

static int tda8425_initialize(struct CHIPSTATE *chip)
{
      struct CHIPDESC *desc = chiplist + chip->type;
      int inputmap[4] = { /* tuner  */ TDA8425_S1_CH2, /* radio  */ TDA8425_S1_CH1,
                      /* extern     */ TDA8425_S1_CH1, /* intern */ TDA8425_S1_OFF};

      if (chip->c.adapter->id == I2C_HW_B_RIVA) {
            memcpy (desc->inputmap, inputmap, sizeof (inputmap));
      }
      return 0;
}

static void tda8425_setmode(struct CHIPSTATE *chip, int mode)
{
      int s1 = chip->shadow.bytes[TDA8425_S1+1] & 0xe1;

      if (mode & VIDEO_SOUND_LANG1) {
            s1 |= TDA8425_S1_ML_SOUND_A;
            s1 |= TDA8425_S1_STEREO_PSEUDO;

      } else if (mode & VIDEO_SOUND_LANG2) {
            s1 |= TDA8425_S1_ML_SOUND_B;
            s1 |= TDA8425_S1_STEREO_PSEUDO;

      } else {
            s1 |= TDA8425_S1_ML_STEREO;

            if (mode & VIDEO_SOUND_MONO)
                  s1 |= TDA8425_S1_STEREO_MONO;
            if (mode & VIDEO_SOUND_STEREO)
                  s1 |= TDA8425_S1_STEREO_SPATIAL;
      }
      chip_write(chip,TDA8425_S1,s1);
}


/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for pic16c54 (PV951)       */

/* the registers of 16C54, I2C sub address. */
#define PIC16C54_REG_KEY_CODE     0x01           /* Not use. */
#define PIC16C54_REG_MISC         0x02

/* bit definition of the RESET register, I2C data. */
#define PIC16C54_MISC_RESET_REMOTE_CTL 0x01 /* bit 0, Reset to receive the key */
                                  /*        code of remote controller */
#define PIC16C54_MISC_MTS_MAIN         0x02 /* bit 1 */
#define PIC16C54_MISC_MTS_SAP          0x04 /* bit 2 */
#define PIC16C54_MISC_MTS_BOTH         0x08 /* bit 3 */
#define PIC16C54_MISC_SND_MUTE         0x10 /* bit 4, Mute Audio(Line-in and Tuner) */
#define PIC16C54_MISC_SND_NOTMUTE      0x20 /* bit 5 */
#define PIC16C54_MISC_SWITCH_TUNER     0x40 /* bit 6  , Switch to Line-in */
#define PIC16C54_MISC_SWITCH_LINE      0x80 /* bit 7  , Switch to Tuner */

/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for TA8874Z                */

/* write 1st byte */
#define TA8874Z_LED_STE 0x80
#define TA8874Z_LED_BIL 0x40
#define TA8874Z_LED_EXT 0x20
#define TA8874Z_MONO_SET      0x10
#define TA8874Z_MUTE    0x08
#define TA8874Z_F_MONO  0x04
#define TA8874Z_MODE_SUB      0x02
#define TA8874Z_MODE_MAIN     0x01

/* write 2nd byte */
/*#define TA8874Z_TI    0x80  */ /* test mode */
#define TA8874Z_SEPARATION    0x3f
#define TA8874Z_SEPARATION_DEFAULT  0x10

/* read */
#define TA8874Z_B1      0x80
#define TA8874Z_B0      0x40
#define TA8874Z_CHAG_FLAG     0x20

/*
 *        B1 B0
 * mono    L  H
 * stereo  L  L
 * BIL     H  L
 */
static int ta8874z_getmode(struct CHIPSTATE *chip)
{
      int val, mode;

      val = chip_read(chip);
      mode = VIDEO_SOUND_MONO;
      if (val & TA8874Z_B1){
            mode |= VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
      }else if (!(val & TA8874Z_B0)){
            mode |= VIDEO_SOUND_STEREO;
      }
      /* v4l_dbg(1, debug, &chip->c, "ta8874z_getmode(): raw chip read: 0x%02x, return: 0x%02x\n", val, mode); */
      return mode;
}

static audiocmd ta8874z_stereo = { 2, {0, TA8874Z_SEPARATION_DEFAULT}};
static audiocmd ta8874z_mono = {2, { TA8874Z_MONO_SET, TA8874Z_SEPARATION_DEFAULT}};
static audiocmd ta8874z_main = {2, { 0, TA8874Z_SEPARATION_DEFAULT}};
static audiocmd ta8874z_sub = {2, { TA8874Z_MODE_SUB, TA8874Z_SEPARATION_DEFAULT}};

static void ta8874z_setmode(struct CHIPSTATE *chip, int mode)
{
      int update = 1;
      audiocmd *t = NULL;
      v4l_dbg(1, debug, &chip->c, "ta8874z_setmode(): mode: 0x%02x\n", mode);

      switch(mode){
      case VIDEO_SOUND_MONO:
            t = &ta8874z_mono;
            break;
      case VIDEO_SOUND_STEREO:
            t = &ta8874z_stereo;
            break;
      case VIDEO_SOUND_LANG1:
            t = &ta8874z_main;
            break;
      case VIDEO_SOUND_LANG2:
            t = &ta8874z_sub;
            break;
      default:
            update = 0;
      }

      if(update)
            chip_cmd(chip, "TA8874Z", t);
}

static int ta8874z_checkit(struct CHIPSTATE *chip)
{
      int rc;
      rc = chip_read(chip);
      return ((rc & 0x1f) == 0x1f) ? 1 : 0;
}

/* ---------------------------------------------------------------------- */
/* audio chip descriptions - struct CHIPDESC                              */

/* insmod options to enable/disable individual audio chips */
static int tda8425  = 1;
static int tda9840  = 1;
static int tda9850  = 1;
static int tda9855  = 1;
static int tda9873  = 1;
static int tda9874a = 1;
static int tea6300  = 0;  /* address clash with msp34xx */
static int tea6320  = 0;  /* address clash with msp34xx */
static int tea6420  = 1;
static int pic16c54 = 1;
static int ta8874z  = 0;  /* address clash with tda9840 */

module_param(tda8425, int, 0444);
module_param(tda9840, int, 0444);
module_param(tda9850, int, 0444);
module_param(tda9855, int, 0444);
module_param(tda9873, int, 0444);
module_param(tda9874a, int, 0444);
module_param(tea6300, int, 0444);
module_param(tea6320, int, 0444);
module_param(tea6420, int, 0444);
module_param(pic16c54, int, 0444);
module_param(ta8874z, int, 0444);

static struct CHIPDESC chiplist[] = {
      {
            .name       = "tda9840",
            .id         = I2C_DRIVERID_TDA9840,
            .insmodopt  = &tda9840,
            .addr_lo    = I2C_ADDR_TDA9840 >> 1,
            .addr_hi    = I2C_ADDR_TDA9840 >> 1,
            .registers  = 5,

            .checkit    = tda9840_checkit,
            .getmode    = tda9840_getmode,
            .setmode    = tda9840_setmode,
            .checkmode  = generic_checkmode,

            .init       = { 2, { TDA9840_TEST, TDA9840_TEST_INT1SN
                        /* ,TDA9840_SW, TDA9840_MONO */} }
      },
      {
            .name       = "tda9873h",
            .id         = I2C_DRIVERID_TDA9873,
            .checkit    = tda9873_checkit,
            .insmodopt  = &tda9873,
            .addr_lo    = I2C_ADDR_TDA985x_L >> 1,
            .addr_hi    = I2C_ADDR_TDA985x_H >> 1,
            .registers  = 3,
            .flags      = CHIP_HAS_INPUTSEL,

            .getmode    = tda9873_getmode,
            .setmode    = tda9873_setmode,
            .checkmode  = generic_checkmode,

            .init       = { 4, { TDA9873_SW, 0xa4, 0x06, 0x03 } },
            .inputreg   = TDA9873_SW,
            .inputmute  = TDA9873_MUTE | TDA9873_AUTOMUTE,
            .inputmap   = {0xa0, 0xa2, 0xa0, 0xa0},
            .inputmask  = TDA9873_INP_MASK|TDA9873_MUTE|TDA9873_AUTOMUTE,

      },
      {
            .name       = "tda9874h/a",
            .id         = I2C_DRIVERID_TDA9874,
            .checkit    = tda9874a_checkit,
            .initialize = tda9874a_initialize,
            .insmodopt  = &tda9874a,
            .addr_lo    = I2C_ADDR_TDA9874 >> 1,
            .addr_hi    = I2C_ADDR_TDA9874 >> 1,

            .getmode    = tda9874a_getmode,
            .setmode    = tda9874a_setmode,
            .checkmode  = generic_checkmode,
      },
      {
            .name       = "tda9850",
            .id         = I2C_DRIVERID_TDA9850,
            .insmodopt  = &tda9850,
            .addr_lo    = I2C_ADDR_TDA985x_L >> 1,
            .addr_hi    = I2C_ADDR_TDA985x_H >> 1,
            .registers  = 11,

            .getmode    = tda985x_getmode,
            .setmode    = tda985x_setmode,

            .init       = { 8, { TDA9850_C4, 0x08, 0x08, TDA985x_STEREO, 0x07, 0x10, 0x10, 0x03 } }
      },
      {
            .name       = "tda9855",
            .id         = I2C_DRIVERID_TDA9855,
            .insmodopt  = &tda9855,
            .addr_lo    = I2C_ADDR_TDA985x_L >> 1,
            .addr_hi    = I2C_ADDR_TDA985x_H >> 1,
            .registers  = 11,
            .flags      = CHIP_HAS_VOLUME | CHIP_HAS_BASSTREBLE,

            .leftreg    = TDA9855_VL,
            .rightreg   = TDA9855_VR,
            .bassreg    = TDA9855_BA,
            .treblereg  = TDA9855_TR,
            .volfunc    = tda9855_volume,
            .bassfunc   = tda9855_bass,
            .treblefunc = tda9855_treble,

            .getmode    = tda985x_getmode,
            .setmode    = tda985x_setmode,

            .init       = { 12, { 0, 0x6f, 0x6f, 0x0e, 0x07<<1, 0x8<<2,
                            TDA9855_MUTE | TDA9855_AVL | TDA9855_LOUD | TDA9855_INT,
                            TDA985x_STEREO | TDA9855_LINEAR | TDA9855_TZCM | TDA9855_VZCM,
                            0x07, 0x10, 0x10, 0x03 }}
      },
      {
            .name       = "tea6300",
            .id         = I2C_DRIVERID_TEA6300,
            .insmodopt  = &tea6300,
            .addr_lo    = I2C_ADDR_TEA6300 >> 1,
            .addr_hi    = I2C_ADDR_TEA6300 >> 1,
            .registers  = 6,
            .flags      = CHIP_HAS_VOLUME | CHIP_HAS_BASSTREBLE | CHIP_HAS_INPUTSEL,

            .leftreg    = TEA6300_VR,
            .rightreg   = TEA6300_VL,
            .bassreg    = TEA6300_BA,
            .treblereg  = TEA6300_TR,
            .volfunc    = tea6300_shift10,
            .bassfunc   = tea6300_shift12,
            .treblefunc = tea6300_shift12,

            .inputreg   = TEA6300_S,
            .inputmap   = { TEA6300_S_SA, TEA6300_S_SB, TEA6300_S_SC },
            .inputmute  = TEA6300_S_GMU,
      },
      {
            .name       = "tea6320",
            .id         = I2C_DRIVERID_TEA6300,
            .initialize = tea6320_initialize,
            .insmodopt  = &tea6320,
            .addr_lo    = I2C_ADDR_TEA6300 >> 1,
            .addr_hi    = I2C_ADDR_TEA6300 >> 1,
            .registers  = 8,
            .flags      = CHIP_HAS_VOLUME | CHIP_HAS_BASSTREBLE | CHIP_HAS_INPUTSEL,

            .leftreg    = TEA6320_V,
            .rightreg   = TEA6320_V,
            .bassreg    = TEA6320_BA,
            .treblereg  = TEA6320_TR,
            .volfunc    = tea6320_volume,
            .bassfunc   = tea6320_shift11,
            .treblefunc = tea6320_shift11,

            .inputreg   = TEA6320_S,
            .inputmap   = { TEA6320_S_SA, TEA6420_S_SB, TEA6300_S_SC, TEA6320_S_SD },
            .inputmute  = TEA6300_S_GMU,
      },
      {
            .name       = "tea6420",
            .id         = I2C_DRIVERID_TEA6420,
            .insmodopt  = &tea6420,
            .addr_lo    = I2C_ADDR_TEA6420 >> 1,
            .addr_hi    = I2C_ADDR_TEA6420 >> 1,
            .registers  = 1,
            .flags      = CHIP_HAS_INPUTSEL,

            .inputreg   = -1,
            .inputmap   = { TEA6420_S_SA, TEA6420_S_SB, TEA6420_S_SC },
            .inputmute  = TEA6300_S_GMU,
      },
      {
            .name       = "tda8425",
            .id         = I2C_DRIVERID_TDA8425,
            .insmodopt  = &tda8425,
            .addr_lo    = I2C_ADDR_TDA8425 >> 1,
            .addr_hi    = I2C_ADDR_TDA8425 >> 1,
            .registers  = 9,
            .flags      = CHIP_HAS_VOLUME | CHIP_HAS_BASSTREBLE | CHIP_HAS_INPUTSEL,

            .leftreg    = TDA8425_VL,
            .rightreg   = TDA8425_VR,
            .bassreg    = TDA8425_BA,
            .treblereg  = TDA8425_TR,
            .volfunc    = tda8425_shift10,
            .bassfunc   = tda8425_shift12,
            .treblefunc = tda8425_shift12,

            .inputreg   = TDA8425_S1,
            .inputmap   = { TDA8425_S1_CH1, TDA8425_S1_CH1, TDA8425_S1_CH1 },
            .inputmute  = TDA8425_S1_OFF,

            .setmode    = tda8425_setmode,
            .initialize = tda8425_initialize,
      },
      {
            .name       = "pic16c54 (PV951)",
            .id         = I2C_DRIVERID_PIC16C54_PV9,
            .insmodopt  = &pic16c54,
            .addr_lo    = I2C_ADDR_PIC16C54 >> 1,
            .addr_hi    = I2C_ADDR_PIC16C54>> 1,
            .registers  = 2,
            .flags      = CHIP_HAS_INPUTSEL,

            .inputreg   = PIC16C54_REG_MISC,
            .inputmap   = {PIC16C54_MISC_SND_NOTMUTE|PIC16C54_MISC_SWITCH_TUNER,
                       PIC16C54_MISC_SND_NOTMUTE|PIC16C54_MISC_SWITCH_LINE,
                       PIC16C54_MISC_SND_NOTMUTE|PIC16C54_MISC_SWITCH_LINE,
                       PIC16C54_MISC_SND_MUTE},
            .inputmute  = PIC16C54_MISC_SND_MUTE,
      },
      {
            .name       = "ta8874z",
            .id         = -1,
            /*.id         = I2C_DRIVERID_TA8874Z, */
            .checkit    = ta8874z_checkit,
            .insmodopt  = &ta8874z,
            .addr_lo    = I2C_ADDR_TDA9840 >> 1,
            .addr_hi    = I2C_ADDR_TDA9840 >> 1,
            .registers  = 2,

            .getmode    = ta8874z_getmode,
            .setmode    = ta8874z_setmode,
            .checkmode  = generic_checkmode,

            .init       = {2, { TA8874Z_MONO_SET, TA8874Z_SEPARATION_DEFAULT}},
      },
      { .name = NULL } /* EOF */
};


/* ---------------------------------------------------------------------- */
/* i2c registration                                                       */

static int chip_attach(struct i2c_adapter *adap, int addr, int kind)
{
      struct CHIPSTATE *chip;
      struct CHIPDESC  *desc;

      chip = kzalloc(sizeof(*chip),GFP_KERNEL);
      if (!chip)
            return -ENOMEM;
      memcpy(&chip->c,&client_template,sizeof(struct i2c_client));
      chip->c.adapter = adap;
      chip->c.addr = addr;
      i2c_set_clientdata(&chip->c, chip);

      /* find description for the chip */
      v4l_dbg(1, debug, &chip->c, "chip found @ 0x%x\n", addr<<1);
      for (desc = chiplist; desc->name != NULL; desc++) {
            if (0 == *(desc->insmodopt))
                  continue;
            if (addr < desc->addr_lo ||
                addr > desc->addr_hi)
                  continue;
            if (desc->checkit && !desc->checkit(chip))
                  continue;
            break;
      }
      if (desc->name == NULL) {
            v4l_dbg(1, debug, &chip->c, "no matching chip description found\n");
            return -EIO;
      }
      v4l_info(&chip->c, "%s found @ 0x%x (%s)\n", desc->name, addr<<1, adap->name);
      if (desc->flags) {
            v4l_dbg(1, debug, &chip->c, "matches:%s%s%s.\n",
                  (desc->flags & CHIP_HAS_VOLUME)     ? " volume"      : "",
                  (desc->flags & CHIP_HAS_BASSTREBLE) ? " bass/treble" : "",
                  (desc->flags & CHIP_HAS_INPUTSEL)   ? " audiomux"    : "");
      }

      /* fill required data structures */
      strcpy(chip->c.name, desc->name);
      chip->type = desc-chiplist;
      chip->shadow.count = desc->registers+1;
      chip->prevmode = -1;
      chip->audmode = V4L2_TUNER_MODE_LANG1;
      /* register */
      i2c_attach_client(&chip->c);

      /* initialization  */
      if (desc->initialize != NULL)
            desc->initialize(chip);
      else
            chip_cmd(chip,"init",&desc->init);

      if (desc->flags & CHIP_HAS_VOLUME) {
            chip->left   = desc->leftinit   ? desc->leftinit   : 65535;
            chip->right  = desc->rightinit  ? desc->rightinit  : 65535;
            chip_write(chip,desc->leftreg,desc->volfunc(chip->left));
            chip_write(chip,desc->rightreg,desc->volfunc(chip->right));
      }
      if (desc->flags & CHIP_HAS_BASSTREBLE) {
            chip->treble = desc->trebleinit ? desc->trebleinit : 32768;
            chip->bass   = desc->bassinit   ? desc->bassinit   : 32768;
            chip_write(chip,desc->bassreg,desc->bassfunc(chip->bass));
            chip_write(chip,desc->treblereg,desc->treblefunc(chip->treble));
      }

      chip->thread = NULL;
      if (desc->checkmode) {
            /* start async thread */
            init_timer(&chip->wt);
            chip->wt.function = chip_thread_wake;
            chip->wt.data     = (unsigned long)chip;
            chip->thread = kthread_run(chip_thread, chip, chip->c.name);
            if (IS_ERR(chip->thread)) {
                  v4l_warn(&chip->c, "%s: failed to create kthread\n",
                         chip->c.name);
                  chip->thread = NULL;
            }
      }
      return 0;
}

static int chip_probe(struct i2c_adapter *adap)
{
      /* don't attach on saa7146 based cards,
         because dedicated drivers are used */
      if ((adap->id == I2C_HW_SAA7146))
            return 0;
      if (adap->class & I2C_CLASS_TV_ANALOG)
            return i2c_probe(adap, &addr_data, chip_attach);
      return 0;
}

static int chip_detach(struct i2c_client *client)
{
      struct CHIPSTATE *chip = i2c_get_clientdata(client);

      del_timer_sync(&chip->wt);
      if (chip->thread) {
            /* shutdown async thread */
            kthread_stop(chip->thread);
            chip->thread = NULL;
      }

      i2c_detach_client(&chip->c);
      kfree(chip);
      return 0;
}

static int tvaudio_set_ctrl(struct CHIPSTATE *chip, struct v4l2_control *ctrl)
{
      struct CHIPDESC *desc = chiplist + chip->type;

      switch (ctrl->id) {
      case V4L2_CID_AUDIO_MUTE:
            if (ctrl->value < 0 || ctrl->value >= 2)
                  return -ERANGE;
            chip->muted = ctrl->value;
            if (chip->muted)
                  chip_write_masked(chip,desc->inputreg,desc->inputmute,desc->inputmask);
            else
                  chip_write_masked(chip,desc->inputreg,
                              desc->inputmap[chip->input],desc->inputmask);
            break;
      default:
            return -EINVAL;
      }
      return 0;
}


/* ---------------------------------------------------------------------- */
/* video4linux interface                                                  */

static int chip_command(struct i2c_client *client,
                  unsigned int cmd, void *arg)
{
      struct CHIPSTATE *chip = i2c_get_clientdata(client);
      struct CHIPDESC  *desc = chiplist + chip->type;

      v4l_dbg(1, debug, &chip->c, "%s: chip_command 0x%x\n", chip->c.name, cmd);

      switch (cmd) {
      case AUDC_SET_RADIO:
            chip->radio = 1;
            chip->watch_stereo = 0;
            /* del_timer(&chip->wt); */
            break;

      /* --- v4l ioctls --- */
      /* take care: bttv does userspace copying, we'll get a
      kernel pointer here... */
      case VIDIOCGAUDIO:
      {
            struct video_audio *va = arg;

            if (desc->flags & CHIP_HAS_VOLUME) {
                  va->flags  |= VIDEO_AUDIO_VOLUME;
                  va->volume  = max(chip->left,chip->right);
                  if (va->volume)
                        va->balance = (32768*min(chip->left,chip->right))/
                              va->volume;
                  else
                        va->balance = 32768;
            }
            if (desc->flags & CHIP_HAS_BASSTREBLE) {
                  va->flags |= VIDEO_AUDIO_BASS | VIDEO_AUDIO_TREBLE;
                  va->bass   = chip->bass;
                  va->treble = chip->treble;
            }
            if (!chip->radio) {
                  if (desc->getmode)
                        va->mode = desc->getmode(chip);
                  else
                        va->mode = VIDEO_SOUND_MONO;
            }
            break;
      }

      case VIDIOCSAUDIO:
      {
            struct video_audio *va = arg;

            if (desc->flags & CHIP_HAS_VOLUME) {
                  chip->left = (min(65536 - va->balance,32768) *
                        va->volume) / 32768;
                  chip->right = (min(va->balance,(__u16)32768) *
                        va->volume) / 32768;
                  chip_write(chip,desc->leftreg,desc->volfunc(chip->left));
                  chip_write(chip,desc->rightreg,desc->volfunc(chip->right));
            }
            if (desc->flags & CHIP_HAS_BASSTREBLE) {
                  chip->bass = va->bass;
                  chip->treble = va->treble;
                  chip_write(chip,desc->bassreg,desc->bassfunc(chip->bass));
                  chip_write(chip,desc->treblereg,desc->treblefunc(chip->treble));
            }
            if (desc->setmode && va->mode) {
                  chip->watch_stereo = 0;
                  /* del_timer(&chip->wt); */
                  chip->mode = va->mode;
                  desc->setmode(chip,va->mode);
            }
            break;
      }

      case VIDIOC_S_CTRL:
            return tvaudio_set_ctrl(chip, arg);

      case VIDIOC_INT_G_AUDIO_ROUTING:
      {
            struct v4l2_routing *rt = arg;

            rt->input = chip->input;
            rt->output = 0;
            break;
      }

      case VIDIOC_INT_S_AUDIO_ROUTING:
      {
            struct v4l2_routing *rt = arg;

            if (!(desc->flags & CHIP_HAS_INPUTSEL) || rt->input >= 4)
                        return -EINVAL;
            /* There are four inputs: tuner, radio, extern and intern. */
            chip->input = rt->input;
            if (chip->muted)
                  break;
            chip_write_masked(chip, desc->inputreg,
                        desc->inputmap[chip->input], desc->inputmask);
            break;
      }

      case VIDIOC_S_TUNER:
      {
            struct v4l2_tuner *vt = arg;
            int mode = 0;

            if (chip->radio)
                  break;
            switch (vt->audmode) {
            case V4L2_TUNER_MODE_MONO:
                  mode = VIDEO_SOUND_MONO;
                  break;
            case V4L2_TUNER_MODE_STEREO:
            case V4L2_TUNER_MODE_LANG1_LANG2:
                  mode = VIDEO_SOUND_STEREO;
                  break;
            case V4L2_TUNER_MODE_LANG1:
                  mode = VIDEO_SOUND_LANG1;
                  break;
            case V4L2_TUNER_MODE_LANG2:
                  mode = VIDEO_SOUND_LANG2;
                  break;
            default:
                  return -EINVAL;
            }
            chip->audmode = vt->audmode;

            if (desc->setmode && mode) {
                  chip->watch_stereo = 0;
                  /* del_timer(&chip->wt); */
                  chip->mode = mode;
                  desc->setmode(chip, mode);
            }
            break;
      }

      case VIDIOC_G_TUNER:
      {
            struct v4l2_tuner *vt = arg;
            int mode = VIDEO_SOUND_MONO;

            if (chip->radio)
                  break;
            vt->audmode = chip->audmode;
            vt->rxsubchans = 0;
            vt->capability = V4L2_TUNER_CAP_STEREO |
                  V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2;

            if (desc->getmode)
                  mode = desc->getmode(chip);

            if (mode & VIDEO_SOUND_MONO)
                  vt->rxsubchans |= V4L2_TUNER_SUB_MONO;
            if (mode & VIDEO_SOUND_STEREO)
                  vt->rxsubchans |= V4L2_TUNER_SUB_STEREO;
            /* Note: for SAP it should be mono/lang2 or stereo/lang2.
               When this module is converted fully to v4l2, then this
               should change for those chips that can detect SAP. */
            if (mode & VIDEO_SOUND_LANG1)
                  vt->rxsubchans = V4L2_TUNER_SUB_LANG1 |
                               V4L2_TUNER_SUB_LANG2;
            break;
      }

      case VIDIOCSCHAN:
      case VIDIOC_S_STD:
            chip->radio = 0;
            break;

      case VIDIOCSFREQ:
      case VIDIOC_S_FREQUENCY:
            chip->mode = 0; /* automatic */
            if (desc->checkmode) {
                  desc->setmode(chip,VIDEO_SOUND_MONO);
                  if (chip->prevmode != VIDEO_SOUND_MONO)
                        chip->prevmode = -1; /* reset previous mode */
                  mod_timer(&chip->wt, jiffies+msecs_to_jiffies(2000));
                  /* the thread will call checkmode() later */
            }
            break;

      case VIDIOC_G_CHIP_IDENT:
            return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_TVAUDIO, 0);
      }
      return 0;
}

static struct i2c_driver driver = {
      .driver = {
            .name    = "tvaudio",
      },
      .id              = I2C_DRIVERID_TVAUDIO,
      .attach_adapter  = chip_probe,
      .detach_client   = chip_detach,
      .command         = chip_command,
};

static struct i2c_client client_template =
{
      .name       = "(unset)",
      .driver     = &driver,
};

static int __init audiochip_init_module(void)
{
      struct CHIPDESC  *desc;

      if (debug) {
            printk(KERN_INFO "tvaudio: TV audio decoder + audio/video mux driver\n");
            printk(KERN_INFO "tvaudio: known chips: ");
            for (desc = chiplist; desc->name != NULL; desc++)
                  printk("%s%s", (desc == chiplist) ? "" : ", ", desc->name);
            printk("\n");
      }

      return i2c_add_driver(&driver);
}

static void __exit audiochip_cleanup_module(void)
{
      i2c_del_driver(&driver);
}

module_init(audiochip_init_module);
module_exit(audiochip_cleanup_module);

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

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