Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1740 insertions, 0 deletions

diff --git a/drivers/media/video/tvaudio.c b/drivers/media/video/tvaudio.c
new file mode 100644
index 00000000000..065eb4007b1
--- /dev/null
+++ b/drivers/media/video/tvaudio.c
@@ -0,0 +1,1740 @@
+/*
+ * 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/config.h>
+#include <linux/module.h>
+#include <linux/moduleparam.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/i2c-algo-bit.h>
+#include <linux/init.h>
+#include <linux/smp_lock.h>
+
+#include <media/audiochip.h>
+#include <media/id.h>
+
+#include "tvaudio.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)
+#define dprintk  if (debug) printk
+
+/* ---------------------------------------------------------------------- */
+/* 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[8];
+	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,mode;
+	int prevmode;
+	int norm;
+
+	/* thread */
+	pid_t                tpid;
+	struct completion    texit;
+	wait_queue_head_t    wq;
+	struct timer_list    wt;
+	int                  done;
+	int                  watch_stereo;
+};
+
+#define VIDEO_MODE_RADIO 16      /* norm magic for radio mode */
+
+/* ---------------------------------------------------------------------- */
+/* i2c addresses                                                          */
+
+static unsigned short normal_i2c[] = {
+	I2C_TDA8425   >> 1,
+	I2C_TEA6300   >> 1,
+	I2C_TEA6420   >> 1,
+	I2C_TDA9840   >> 1,
+	I2C_TDA985x_L >> 1,
+	I2C_TDA985x_H >> 1,
+	I2C_TDA9874   >> 1,
+	I2C_PIC16C54  >> 1,
+	I2C_CLIENT_END };
+static unsigned short normal_i2c_range[2] = { I2C_CLIENT_END, 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) {
+		dprintk("%s: chip_write: 0x%x\n",
+			i2c_clientname(&chip->c), val);
+		chip->shadow.bytes[1] = val;
+		buffer[0] = val;
+		if (1 != i2c_master_send(&chip->c,buffer,1)) {
+			printk(KERN_WARNING "%s: I/O error (write 0x%x)\n",
+			       i2c_clientname(&chip->c), val);
+			return -1;
+		}
+	} else {
+		dprintk("%s: chip_write: reg%d=0x%x\n",
+			i2c_clientname(&chip->c), subaddr, val);
+		chip->shadow.bytes[subaddr+1] = val;
+		buffer[0] = subaddr;
+		buffer[1] = val;
+		if (2 != i2c_master_send(&chip->c,buffer,2)) {
+			printk(KERN_WARNING "%s: I/O error (write reg%d=0x%x)\n",
+			       i2c_clientname(&chip->c), 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)) {
+		printk(KERN_WARNING "%s: I/O error (read)\n",
+		       i2c_clientname(&chip->c));
+		return -1;
+	}
+	dprintk("%s: chip_read: 0x%x\n",i2c_clientname(&chip->c),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)) {
+		printk(KERN_WARNING "%s: I/O error (read2)\n",
+		       i2c_clientname(&chip->c));
+		return -1;
+	}
+	dprintk("%s: chip_read2: reg%d=0x%x\n",
+		i2c_clientname(&chip->c),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) */
+	dprintk("%s: chip_cmd(%s): reg=%d, data:",
+		i2c_clientname(&chip->c),name,cmd->bytes[0]);
+	for (i = 1; i < cmd->count; i++) {
+		dprintk(" 0x%x",cmd->bytes[i]);
+		chip->shadow.bytes[i+cmd->bytes[0]] = cmd->bytes[i];
+	}
+	dprintk("\n");
+
+	/* send data to the chip */
+	if (cmd->count != i2c_master_send(&chip->c,cmd->bytes,cmd->count)) {
+		printk(KERN_WARNING "%s: I/O error (%s)\n", i2c_clientname(&chip->c), 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_interruptible(&chip->wq);
+}
+
+static int chip_thread(void *data)
+{
+	DECLARE_WAITQUEUE(wait, current);
+        struct CHIPSTATE *chip = data;
+	struct CHIPDESC  *desc = chiplist + chip->type;
+
+	daemonize("%s",i2c_clientname(&chip->c));
+	allow_signal(SIGTERM);
+	dprintk("%s: thread started\n", i2c_clientname(&chip->c));
+
+	for (;;) {
+		add_wait_queue(&chip->wq, &wait);
+		if (!chip->done) {
+			set_current_state(TASK_INTERRUPTIBLE);
+			schedule();
+		}
+		remove_wait_queue(&chip->wq, &wait);
+		try_to_freeze(PF_FREEZE);
+		if (chip->done || signal_pending(current))
+			break;
+		dprintk("%s: thread wakeup\n", i2c_clientname(&chip->c));
+
+		/* don't do anything for radio or if mode != auto */
+		if (chip->norm == VIDEO_MODE_RADIO || chip->mode != 0)
+			continue;
+
+		/* have a look what's going on */
+		desc->checkmode(chip);
+
+		/* schedule next check */
+		mod_timer(&chip->wt, jiffies+2*HZ);
+	}
+
+	dprintk("%s: thread exiting\n", i2c_clientname(&chip->c));
+        complete_and_exit(&chip->texit, 0);
+	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;
+
+	dprintk("%s: thread checkmode\n", i2c_clientname(&chip->c));
+	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;
+
+	dprintk ("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);
+}
+
+/* ---------------------------------------------------------------------- */
+/* 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;
+	dprintk ("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) {
+		dprintk("tda9873_setmode(): external input\n");
+		return;
+	}
+
+	dprintk("tda9873_setmode(): chip->shadow.bytes[%d] = %d\n", TDA9873_SW+1, chip->shadow.bytes[TDA9873_SW+1]);
+	dprintk("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);
+	dprintk("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
+	}
+	dprintk("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 0
+		if((nsr & 0x02) && !(dsr & 0x10)) /* NSR.S/MB=1 and DSR.AMSTAT=0 */
+			mode |= VIDEO_SOUND_STEREO;
+#else
+		if(nsr & 0x02) /* NSR.S/MB=1 */
+			mode |= VIDEO_SOUND_STEREO;
+#endif
+		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;
+	}
+
+	dprintk("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);
+
+		dprintk("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);
+
+		dprintk("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;
+
+	dprintk("tda9874a_checkit(): DIC=0x%X, SIC=0x%X.\n", dic, sic);
+
+	if((dic == 0x11)||(dic == 0x07)) {
+		printk("tvaudio: 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[8] = { /* tuner	*/ TDA8425_S1_CH2, /* radio  */ TDA8425_S1_CH1,
+			    /* extern	*/ TDA8425_S1_CH1, /* intern */ TDA8425_S1_OFF,
+			    /* off	*/ TDA8425_S1_OFF, /* on     */ TDA8425_S1_CH2};
+
+	if (chip->c.adapter->id == (I2C_ALGO_BIT | 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;
+	}
+	//dprintk ("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;
+	dprintk("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 */
+int tda8425  = 1;
+int tda9840  = 1;
+int tda9850  = 1;
+int tda9855  = 1;
+int tda9873  = 1;
+int tda9874a = 1;
+int tea6300  = 0;  // address clash with msp34xx
+int tea6320  = 0;  // address clash with msp34xx
+int tea6420  = 1;
+int pic16c54 = 1;
+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_TDA9840 >> 1,
+		.addr_hi    = I2C_TDA9840 >> 1,
+		.registers  = 5,
+
+		.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_TDA985x_L >> 1,
+		.addr_hi    = I2C_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, 0xc0},
+		.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_TDA9874 >> 1,
+		.addr_hi    = I2C_TDA9874 >> 1,
+
+		.getmode    = tda9874a_getmode,
+		.setmode    = tda9874a_setmode,
+		.checkmode  = generic_checkmode,
+	},
+	{
+		.name       = "tda9850",
+		.id         = I2C_DRIVERID_TDA9850,
+		.insmodopt  = &tda9850,
+		.addr_lo    = I2C_TDA985x_L >> 1,
+		.addr_hi    = I2C_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_TDA985x_L >> 1,
+		.addr_hi    = I2C_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_TEA6300 >> 1,
+		.addr_hi    = I2C_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_TEA6300 >> 1,
+		.addr_hi    = I2C_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_TEA6420 >> 1,
+		.addr_hi    = I2C_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_TDA8425 >> 1,
+		.addr_hi    = I2C_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_PV951,
+		.insmodopt  = &pic16c54,
+		.addr_lo    = I2C_PIC16C54 >> 1,
+		.addr_hi    = I2C_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,PIC16C54_MISC_SND_MUTE,
+			     PIC16C54_MISC_SND_NOTMUTE},
+		.inputmute  = PIC16C54_MISC_SND_MUTE,
+	},
+	{
+		.name       = "ta8874z",
+		.id         = -1,
+		//.id         = I2C_DRIVERID_TA8874Z,
+		.checkit    = ta8874z_checkit,
+		.insmodopt  = &ta8874z,
+		.addr_lo    = I2C_TDA9840 >> 1,
+		.addr_hi    = I2C_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 = kmalloc(sizeof(*chip),GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+	memset(chip,0,sizeof(*chip));
+	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 */
+	dprintk("tvaudio: chip found @ i2c-addr=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) {
+		dprintk("tvaudio: no matching chip description found\n");
+		return -EIO;
+	}
+	printk("tvaudio: found %s @ 0x%x\n", desc->name, addr<<1);
+	dprintk("tvaudio: 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(i2c_clientname(&chip->c),desc->name);
+	chip->type = desc-chiplist;
+	chip->shadow.count = desc->registers+1;
+        chip->prevmode = -1;
+	/* 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->tpid = -1;
+	if (desc->checkmode) {
+		/* start async thread */
+		init_timer(&chip->wt);
+		chip->wt.function = chip_thread_wake;
+		chip->wt.data     = (unsigned long)chip;
+		init_waitqueue_head(&chip->wq);
+		init_completion(&chip->texit);
+		chip->tpid = kernel_thread(chip_thread,(void *)chip,0);
+		if (chip->tpid < 0)
+			printk(KERN_WARNING "%s: kernel_thread() failed\n",
+			       i2c_clientname(&chip->c));
+		wake_up_interruptible(&chip->wq);
+	}
+	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_ALGO_SAA7146))
+		return 0;
+#ifdef I2C_CLASS_TV_ANALOG
+	if (adap->class & I2C_CLASS_TV_ANALOG)
+		return i2c_probe(adap, &addr_data, chip_attach);
+#else
+	switch (adap->id) {
+	case I2C_ALGO_BIT | I2C_HW_B_BT848:
+	case I2C_ALGO_BIT | I2C_HW_B_RIVA:
+	case I2C_ALGO_SAA7134:
+		return i2c_probe(adap, &addr_data, chip_attach);
+	}
+#endif
+	return 0;
+}
+
+static int chip_detach(struct i2c_client *client)
+{
+	struct CHIPSTATE *chip = i2c_get_clientdata(client);
+
+	del_timer_sync(&chip->wt);
+	if (chip->tpid >= 0) {
+		/* shutdown async thread */
+		chip->done = 1;
+		wake_up_interruptible(&chip->wq);
+		wait_for_completion(&chip->texit);
+	}
+
+	i2c_detach_client(&chip->c);
+	kfree(chip);
+	return 0;
+}
+
+/* ---------------------------------------------------------------------- */
+/* video4linux interface                                                  */
+
+static int chip_command(struct i2c_client *client,
+			unsigned int cmd, void *arg)
+{
+        __u16 *sarg = arg;
+	struct CHIPSTATE *chip = i2c_get_clientdata(client);
+	struct CHIPDESC  *desc = chiplist + chip->type;
+
+	dprintk("%s: chip_command 0x%x\n",i2c_clientname(&chip->c),cmd);
+
+	switch (cmd) {
+	case AUDC_SET_INPUT:
+		if (desc->flags & CHIP_HAS_INPUTSEL) {
+			if (*sarg & 0x80)
+				chip_write_masked(chip,desc->inputreg,desc->inputmute,desc->inputmask);
+			else
+				chip_write_masked(chip,desc->inputreg,desc->inputmap[*sarg],desc->inputmask);
+		}
+		break;
+
+	case AUDC_SET_RADIO:
+		dprintk(KERN_DEBUG "tvaudio: AUDC_SET_RADIO\n");
+		chip->norm = VIDEO_MODE_RADIO;
+		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->norm != VIDEO_MODE_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 VIDIOCSCHAN:
+	{
+		struct video_channel *vc = arg;
+
+		dprintk(KERN_DEBUG "tvaudio: VIDIOCSCHAN\n");
+		chip->norm = vc->norm;
+		break;
+	}
+	case VIDIOCSFREQ:
+	{
+	    	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+2*HZ);
+			/* the thread will call checkmode() later */
+		}
+	}
+	}
+	return 0;
+}
+
+
+static struct i2c_driver driver = {
+	.owner           = THIS_MODULE,
+        .name            = "generic i2c audio driver",
+        .id              = I2C_DRIVERID_TVAUDIO,
+        .flags           = I2C_DF_NOTIFY,
+        .attach_adapter  = chip_probe,
+        .detach_client   = chip_detach,
+        .command         = chip_command,
+};
+
+static struct i2c_client client_template =
+{
+	I2C_DEVNAME("(unset)"),
+	.flags      = I2C_CLIENT_ALLOW_USE,
+        .driver     = &driver,
+};
+
+static int __init audiochip_init_module(void)
+{
+	struct CHIPDESC  *desc;
+	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:
+ */