/* * for the TEA6300 chip (only found on Gateway STB TV/FM cards tho the best * of my knowledge) * WARNING: THIS DRIVER WILL LOAD WITHOUT COMPLAINTS EVEN IF THE WRONG * CHIP (i.e., an MSP3400) IS ON I2C ADDRESS 0x80 (it relies on i2c to * make sure that there is a device acknowledging that address). This * is a potential problem because the MSP3400 is very popular and does * use this address! You have been warned! * * Copyright (c) 1998 Greg Alexander * This code is placed under the terms of the GNU General Public License * Code liberally copied from msp3400.c, which is by Gerd Knorr * * All of this should work, though it would be nice to eventually support * balance (different left,right values) and, if someone ever finds a card * with the support (or if you're careful with a soldering iron), fade * (front/back). */ #include #include #include #include #include #include #include #include #include #include #include #include "bttv.h" #include "audiochip.h" /* Addresses to scan */ #define I2C_TEA6300 0x80 static unsigned short normal_i2c[] = { I2C_TEA6300 >> 1, I2C_CLIENT_END}; static unsigned short normal_i2c_range[] = {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 }; MODULE_PARM(debug,"i"); static int debug = 0; /* insmod parameter */ #define dprintk if (debug) printk struct tea6300 { int mode; /* set to AUDIO_{OFF,TUNER,RADIO,EXTERN} */ int stereo; __u16 left,right; __u16 bass,treble; }; static struct i2c_driver driver; static struct i2c_client client_template; #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 */ /* ******************************** * * functions for talking to TEA6300 * * ******************************** */ static int tea6300_write(struct i2c_client *client, int addr, int val) { unsigned char buffer[2]; buffer[0] = addr; buffer[1] = val; if (2 != i2c_master_send(client,buffer,2)) { printk(KERN_WARNING "tea6300: I/O error, trying (write %d 0x%x)\n", addr, val); return -1; } return 0; } static void tea6300_set(struct i2c_client *client) { struct tea6300 *tea = client->data; /* mode is ignored today */ dprintk(KERN_DEBUG "tea6300_set(%04x,%04x,%04x,%04x)\n",tea->left>>10,tea->right>>10,tea->bass>>12,tea->treble>>12); tea6300_write(client, TEA6300_VL, tea->left>>10 ); tea6300_write(client, TEA6300_VR, tea->right>>10 ); tea6300_write(client, TEA6300_BA, tea->bass>>12 ); tea6300_write(client, TEA6300_TR, tea->treble>>12); } static void do_tea6300_init(struct i2c_client *client) { struct tea6300 *tea = client->data; tea->left=tea->right =49152; /* -10dB (loud enough, but not beyond normal line levels - so as to avoid clipping */ tea->bass=tea->treble=28672; /* 0dB */ tea->mode=AUDIO_OFF; tea->stereo=1; /* left=right=0x27<<10, bass=treble=0x07<<12 */ tea6300_write(client, TEA6300_FA, 0x3f ); /* fader off */ tea6300_write(client, TEA6300_S , TEA6300_S_GMU); /* mute */ tea6300_set(client); } static void tea6300_audio(struct i2c_client *client, int mode) { struct tea6300 *tea = client->data; /* valid for AUDIO_TUNER, RADIO, EXTERN, OFF */ dprintk(KERN_DEBUG "tea6300_audio:%d (T,R,E,I,O)\n",mode); tea->mode=mode; if (mode==AUDIO_OFF) { /* just mute it */ tea6300_write(client, TEA6300_S, TEA6300_S_GMU); return; } switch(mode) { case AUDIO_TUNER: tea6300_write(client, TEA6300_S, TEA6300_S_SA); break; case AUDIO_RADIO: tea6300_write(client, TEA6300_S, TEA6300_S_SB); break; case AUDIO_EXTERN: tea6300_write(client, TEA6300_S, TEA6300_S_SC); break; } } /* *********************** * * i2c interface functions * * *********************** */ static int tea6300_attach(struct i2c_adapter *adap, int addr, unsigned short flags, int kind) { struct tea6300 *tea; struct i2c_client *client; client = kmalloc(sizeof *client,GFP_KERNEL); if (!client) return -ENOMEM; memcpy(client,&client_template,sizeof(struct i2c_client)); client->adapter = adap; client->addr = addr; client->data = tea = kmalloc(sizeof *tea,GFP_KERNEL); if (!tea) return -ENOMEM; memset(tea,0,sizeof *tea); do_tea6300_init(client); MOD_INC_USE_COUNT; strcpy(client->name,"TEA6300T"); printk(KERN_INFO "tea6300: initialized\n"); i2c_attach_client(client); return 0; } static int tea6300_probe(struct i2c_adapter *adap) { if (adap->id == (I2C_ALGO_BIT | I2C_HW_B_BT848)) return i2c_probe(adap, &addr_data, tea6300_attach); return 0; } static int tea6300_detach(struct i2c_client *client) { struct tea6300 *tea = client->data; do_tea6300_init(client); i2c_detach_client(client); kfree(tea); kfree(client); MOD_DEC_USE_COUNT; return 0; } static int tea6300_command(struct i2c_client *client, unsigned int cmd, void *arg) { struct tea6300 *tea = client->data; __u16 *sarg = arg; switch (cmd) { case AUDC_SET_RADIO: tea6300_audio(client,AUDIO_RADIO); break; case AUDC_SET_INPUT: tea6300_audio(client,*sarg); break; /* --- v4l ioctls --- */ /* take care: bttv does userspace copying, we'll get a kernel pointer here... */ case VIDIOCGAUDIO: { struct video_audio *va = arg; va->flags |= VIDEO_AUDIO_VOLUME | VIDEO_AUDIO_BASS | VIDEO_AUDIO_TREBLE; va->volume=MAX(tea->left,tea->right); va->balance=(32768*MIN(tea->left,tea->right))/ (va->volume ? va->volume : 1); va->balance=(tea->leftright)? (65535-va->balance) : va->balance; va->bass = tea->bass; va->treble = tea->treble; break; } case VIDIOCSAUDIO: { struct video_audio *va = arg; tea->left = (MIN(65536 - va->balance,32768) * va->volume) / 32768; tea->right = (MIN(va->balance,32768) * va->volume) / 32768; tea->bass = va->bass; tea->treble = va->treble; tea6300_set(client); break; } #if 0 /* --- old, obsolete interface --- */ case AUDC_GET_VOLUME_LEFT: *sarg = tea->left; break; case AUDC_GET_VOLUME_RIGHT: *sarg = tea->right; break; case AUDC_SET_VOLUME_LEFT: tea->left = *sarg; tea6300_set(client); break; case AUDC_SET_VOLUME_RIGHT: tea->right = *sarg; tea6300_set(client); break; case AUDC_GET_BASS: *sarg = tea->bass; break; case AUDC_SET_BASS: tea->bass = *sarg; tea6300_set(client); break; case AUDC_GET_TREBLE: *sarg = tea->treble; break; case AUDC_SET_TREBLE: tea->treble = *sarg; tea6300_set(client); break; case AUDC_GET_STEREO: *sarg = tea->stereo?VIDEO_SOUND_STEREO:VIDEO_SOUND_MONO; break; case AUDC_SET_STEREO: tea->stereo=(*sarg==VIDEO_SOUND_MONO)?0:1; /* TODO: make this write to the TDA9850? */ break; /* case AUDC_SWITCH_MUTE: someday, maybe -- not a lot of point to case AUDC_NEWCHANNEL: it and it would require preserving state case AUDC_GET_DC: huh?? (not used by bttv.c) */ #endif default: /* nothing */ } return 0; } static struct i2c_driver driver = { "i2c tea6300 driver", I2C_DRIVERID_TEA6300, I2C_DF_NOTIFY, tea6300_probe, tea6300_detach, tea6300_command, }; static struct i2c_client client_template = { "(unset)", /* name */ -1, 0, 0, NULL, &driver }; #ifdef MODULE int init_module(void) #else int tea6300_init(void) #endif { i2c_add_driver(&driver); return 0; } #ifdef MODULE void cleanup_module(void) { i2c_del_driver(&driver); } #endif /* * Local variables: * c-basic-offset: 8 * End: */