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/*
* 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/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 "audiochip.h"
#include "tvaudio.h"
#include "id.h"
/* ---------------------------------------------------------------------- */
/* insmod args */
MODULE_PARM(debug,"i");
static int debug = 0; /* insmod parameter */
#define dprintk if (debug) printk
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");
/* ---------------------------------------------------------------------- */
/* 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;
/* thread */
struct task_struct *thread;
struct semaphore *notify;
wait_queue_head_t wq;
struct timer_list wt;
int done;
};
/* ---------------------------------------------------------------------- */
/* 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_TDA9874A >> 1,
I2C_PIC16C54 >> 1,
I2C_CLIENT_END };
static unsigned short normal_i2c_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
static unsigned short force[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
static struct i2c_client_address_data addr_data = {
normal_i2c, normal_i2c_range,
probe, probe_range,
ignore, ignore_range,
force
};
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", chip->c.name, 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",
chip->c.name, val);
return -1;
}
} else {
dprintk("%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)) {
printk(KERN_WARNING "%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)) {
printk(KERN_WARNING "%s: I/O error (read)\n",
chip->c.name);
return -1;
}
dprintk("%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)) {
printk(KERN_WARNING "%s: I/O error (read2)\n",
chip->c.name);
return -1;
}
dprintk("%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) */
dprintk("%s: chip_cmd(%s): reg=%d, data:",
chip->c.name,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", 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_interruptible(&chip->wq);
}
static int chip_thread(void *data)
{
struct CHIPSTATE *chip = data;
struct CHIPDESC *desc = chiplist + chip->type;
#ifdef CONFIG_SMP
lock_kernel();
#endif
daemonize();
sigfillset(¤t->blocked);
strcpy(current->comm,chip->c.name);
chip->thread = current;
#ifdef CONFIG_SMP
unlock_kernel();
#endif
dprintk("%s: thread started\n", chip->c.name);
if(chip->notify != NULL)
up(chip->notify);
for (;;) {
interruptible_sleep_on(&chip->wq);
dprintk("%s: thread wakeup\n", chip->c.name);
if (chip->done || signal_pending(current))
break;
if (0 != chip->mode)
/* don't do anything if mode != auto */
continue;
/* have a look what's going on */
desc->checkmode(chip);
/* schedule next check */
mod_timer(&chip->wt, jiffies+2*HZ);
}
chip->thread = NULL;
dprintk("%s: thread exiting\n", chip->c.name);
if(chip->notify != NULL)
up(chip->notify);
return 0;
}
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", chip->c.name);
chip->prevmode = mode;
if (mode & VIDEO_SOUND_LANG1)
desc->setmode(chip,VIDEO_SOUND_LANG1);
else if (mode & VIDEO_SOUND_LANG2)
desc->setmode(chip,VIDEO_SOUND_LANG2);
else if (mode & VIDEO_SOUND_STEREO)
desc->setmode(chip,VIDEO_SOUND_STEREO);
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 */
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;
}
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 */
int tda9855_volume(int val) { return val/0x2e8+0x27; }
int tda9855_bass(int val) { return val/0xccc+0x06; }
int tda9855_treble(int val) { return (val/0x1c71+0x3)<<1; }
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;
}
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 */
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;
}
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);
}
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 tda9874a */
/* Dariusz Kowalewski <darekk@automex.pl> */
/* Subaddresses for 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 */
#define TDA9874A_ESP 0xFF /* easy standard progr. */
/* Subaddresses for 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_ESP = 0x07; /* default standard: NICAM D/K */
/* insmod options for tda9874a */
static int tda9874a_SIF = -1;
static int tda9874a_STD = -1;
MODULE_PARM(tda9874a_SIF,"i");
MODULE_PARM(tda9874a_STD,"i");
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);
chip_write(chip, TDA9874A_FMMR, 0x80);
chip_write(chip, TDA9874A_C1OLAR, 0x00); /* 0 dB */
chip_write(chip, TDA9874A_C2OLAR, 0x00); /* 0 dB */
chip_write(chip, TDA9874A_NCONR, 0x00); /* not 0x04 as doc. table 10 says! */
chip_write(chip, TDA9874A_NOLAR, 0x00); /* 0 dB */
chip_write(chip, TDA9874A_AMCONR, 0xf9);
chip_write(chip, TDA9874A_SDACOSR, (tda9874a_mode) ? 0x81:0x80); /* 0x81 */
chip_write(chip, TDA9874A_AOSR, 0x80);
chip_write(chip, TDA9874A_MDACOSR, (tda9874a_mode) ? 0x82:0x80);
chip_write(chip, TDA9874A_ESP, tda9874a_ESP);
return 1;
}
int tda9874a_getmode(struct CHIPSTATE *chip)
{
int dsr,nsr,mode;
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(tda9874a_mode) {
/* check also DSR.RSSF and DSR.AMSTAT bits? */
if(nsr & 0x02) /* NSR.S/MB */
mode |= VIDEO_SOUND_STEREO;
if(nsr & 0x01) /* NSR.D/SB */
mode |= VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
} else {
if(dsr & 0x02) /* DSR.IDSTE */
mode |= VIDEO_SOUND_STEREO;
if(dsr & 0x04) /* DSR.IDDUA */
mode |= VIDEO_SOUND_LANG1 | VIDEO_SOUND_LANG2;
}
dprintk("tda9874a_getmode(): DSR=0x%X, NSR=0x%X, return: %d.\n",
dsr, nsr, mode);
return mode;
}
void tda9874a_setmode(struct CHIPSTATE *chip, int mode)
{
int aosr=0x80,mdacosr=0x82;
/* note: TDA9874A has auto-select function for audio output */
switch(mode) {
case VIDEO_SOUND_MONO:
case VIDEO_SOUND_STEREO:
break;
case VIDEO_SOUND_LANG1:
aosr = 0x80; /* dual A/A */
mdacosr = (tda9874a_mode) ? 0x82:0x80;
break;
case VIDEO_SOUND_LANG2:
aosr = 0xa0; /* 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);
}
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);
return((dic & 0xff) == 0x11);
}
int tda9874a_initialize(struct CHIPSTATE *chip)
{
if(tda9874a_SIF != -1) {
if(tda9874a_SIF == 1)
tda9874a_GCONR = 0xc0; /* sound IF input 1 */
else if(tda9874a_SIF == 2)
tda9874a_GCONR = 0xc1; /* sound IF input 2 */
else
printk(KERN_WARNING "tda9874a: SIF parameter must be 1 or 2.\n");
}
if(tda9874a_STD != -1) {
if((tda9874a_STD >= 0)&&(tda9874a_STD <= 8)) {
tda9874a_ESP = tda9874a_STD;
tda9874a_mode = (tda9874a_STD < 5) ? 0 : 1;
} else {
printk(KERN_WARNING "tda9874a: STD parameter must be between 0 and 8.\n");
}
}
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 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 */
int tea6300_shift10(int val) { return val >> 10; }
int tea6300_shift12(int val) { return val >> 12; }
/* ---------------------------------------------------------------------- */
/* 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_ON 0xCE /* audio on (mute off) - "linear stereo" mode */
int tda8425_shift10(int val) { return val >> 10 | 0xc0; }
int tda8425_shift12(int val) { return val >> 12 | 0xf0; }
/* ---------------------------------------------------------------------- */
/* 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 - 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;
int tea6420 = 1;
int pic16c54 = 1;
MODULE_PARM(tda8425,"i");
MODULE_PARM(tda9840,"i");
MODULE_PARM(tda9850,"i");
MODULE_PARM(tda9855,"i");
MODULE_PARM(tda9873,"i");
MODULE_PARM(tda9874a,"i");
MODULE_PARM(tea6300,"i");
MODULE_PARM(tea6420,"i");
MODULE_PARM(pic16c54,"i");
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: "tda9874a",
id: I2C_DRIVERID_TDA9874A,
checkit: tda9874a_checkit,
initialize: tda9874a_initialize,
insmodopt: &tda9874a,
addr_lo: I2C_TDA9874A >> 1,
addr_hi: I2C_TDA9874A >> 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_VR,
rightreg: TDA9855_VL,
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: "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_VR,
rightreg: TDA8425_VL,
bassreg: TDA8425_BA,
treblereg: TDA8425_TR,
volfunc: tda8425_shift10,
bassfunc: tda8425_shift12,
treblefunc: tda8425_shift12,
inputreg: TDA8425_S1,
inputmap: { TDA8425_S1_ON, TDA8425_S1_ON, TDA8425_S1_ON },
inputmute: TDA8425_S1_OFF,
},
{
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: NULL } /* EOF */
};
/* ---------------------------------------------------------------------- */
/* i2c registration */
static int chip_attach(struct i2c_adapter *adap, int addr,
unsigned short flags, 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;
chip->c.data = chip;
/* find description for the chip */
dprintk("tvaudio: chip @ 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;
}
dprintk("tvaudio: %s matches:%s%s%s\n",desc->name,
(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;
/* register */
MOD_INC_USE_COUNT;
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 : 65536;
chip->right = desc->rightinit ? desc->rightinit : 65536;
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));
}
if (desc->checkmode) {
/* start async thread */
DECLARE_MUTEX_LOCKED(sem);
chip->notify = &sem;
chip->wt.function = chip_thread_wake;
chip->wt.data = (unsigned long)chip;
init_waitqueue_head(&chip->wq);
kernel_thread(chip_thread,(void *)chip,0);
down(&sem);
chip->notify = NULL;
wake_up_interruptible(&chip->wq);
}
return 0;
}
static int chip_probe(struct i2c_adapter *adap)
{
if (adap->id == (I2C_ALGO_BIT | I2C_HW_B_BT848))
return i2c_probe(adap, &addr_data, chip_attach);
return 0;
}
static int chip_detach(struct i2c_client *client)
{
struct CHIPSTATE *chip = client->data;
del_timer(&chip->wt);
if (NULL != chip->thread) {
/* shutdown async thread */
DECLARE_MUTEX_LOCKED(sem);
chip->notify = &sem;
chip->done = 1;
wake_up_interruptible(&chip->wq);
down(&sem);
chip->notify = NULL;
}
i2c_detach_client(&chip->c);
kfree(chip);
MOD_DEC_USE_COUNT;
return 0;
}
/* ---------------------------------------------------------------------- */
/* video4linux interface */
static int chip_command(struct i2c_client *client,
unsigned int cmd, void *arg)
{
__u16 *sarg = arg;
struct CHIPSTATE *chip = client->data;
struct CHIPDESC *desc = chiplist + chip->type;
dprintk("%s: chip_command 0x%x\n",chip->c.name,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;
/* --- 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);
va->balance = (32768*MIN(chip->left,chip->right))/
(va->volume ? va->volume : 1);
}
if (desc->flags & CHIP_HAS_BASSTREBLE) {
va->flags |= VIDEO_AUDIO_BASS | VIDEO_AUDIO_TREBLE;
va->bass = chip->bass;
va->treble = chip->treble;
}
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,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->mode = va->mode;
desc->setmode(chip,va->mode);
}
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 = {
name: "generic i2c audio driver",
id: I2C_DRIVERID_TVAUDIO, /* FIXME */
flags: I2C_DF_NOTIFY,
attach_adapter: chip_probe,
detach_client: chip_detach,
command: chip_command,
};
static struct i2c_client client_template =
{
name: "(unset)",
driver: &driver,
};
int 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");
i2c_add_driver(&driver);
return 0;
}
void 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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