/* * For the TDA9875 chip * (The TDA9875 is used on the Diamond DTV2000 french version * Other cards probably use these chips as well.) * This driver will not complain if used with any * other i2c device with the same address. * * Copyright (c) 2000 Guillaume Delvit based on Gerd Knorr source and * Eric Sandeen * This code is placed under the terms of the GNU General Public License * Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu) * Which was based on tda8425.c by Greg Alexander (c) 1998 * * OPTIONS: * debug - set to 1 if you'd like to see debug messages * * Revision: 0.1 - original version */ #include #include #include #include #include #include #include #include #include #include #include #include #include static int debug; /* insmod parameter */ module_param(debug, int, S_IRUGO | S_IWUSR); MODULE_LICENSE("GPL"); /* Addresses to scan */ static unsigned short normal_i2c[] = { I2C_ADDR_TDA9875 >> 1, I2C_CLIENT_END }; I2C_CLIENT_INSMOD; /* This is a superset of the TDA9875 */ struct tda9875 { int rvol, lvol; int bass, treble; struct i2c_client c; }; static struct i2c_driver driver; static struct i2c_client client_template; #define dprintk if (debug) printk /* The TDA9875 is made by Philips Semiconductor * http://www.semiconductors.philips.com * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator * */ /* subaddresses for TDA9875 */ #define TDA9875_MUT 0x12 /*General mute (value --> 0b11001100*/ #define TDA9875_CFG 0x01 /* Config register (value --> 0b00000000 */ #define TDA9875_DACOS 0x13 /*DAC i/o select (ADC) 0b0000100*/ #define TDA9875_LOSR 0x16 /*Line output select regirter 0b0100 0001*/ #define TDA9875_CH1V 0x0c /*Channel 1 volume (mute)*/ #define TDA9875_CH2V 0x0d /*Channel 2 volume (mute)*/ #define TDA9875_SC1 0x14 /*SCART 1 in (mono)*/ #define TDA9875_SC2 0x15 /*SCART 2 in (mono)*/ #define TDA9875_ADCIS 0x17 /*ADC input select (mono) 0b0110 000*/ #define TDA9875_AER 0x19 /*Audio effect (AVL+Pseudo) 0b0000 0110*/ #define TDA9875_MCS 0x18 /*Main channel select (DAC) 0b0000100*/ #define TDA9875_MVL 0x1a /* Main volume gauche */ #define TDA9875_MVR 0x1b /* Main volume droite */ #define TDA9875_MBA 0x1d /* Main Basse */ #define TDA9875_MTR 0x1e /* Main treble */ #define TDA9875_ACS 0x1f /* Auxilary channel select (FM) 0b0000000*/ #define TDA9875_AVL 0x20 /* Auxilary volume gauche */ #define TDA9875_AVR 0x21 /* Auxilary volume droite */ #define TDA9875_ABA 0x22 /* Auxilary Basse */ #define TDA9875_ATR 0x23 /* Auxilary treble */ #define TDA9875_MSR 0x02 /* Monitor select register */ #define TDA9875_C1MSB 0x03 /* Carrier 1 (FM) frequency register MSB */ #define TDA9875_C1MIB 0x04 /* Carrier 1 (FM) frequency register (16-8]b */ #define TDA9875_C1LSB 0x05 /* Carrier 1 (FM) frequency register LSB */ #define TDA9875_C2MSB 0x06 /* Carrier 2 (nicam) frequency register MSB */ #define TDA9875_C2MIB 0x07 /* Carrier 2 (nicam) frequency register (16-8]b */ #define TDA9875_C2LSB 0x08 /* Carrier 2 (nicam) frequency register LSB */ #define TDA9875_DCR 0x09 /* Demodulateur configuration regirter*/ #define TDA9875_DEEM 0x0a /* FM de-emphasis regirter*/ #define TDA9875_FMAT 0x0b /* FM Matrix regirter*/ /* values */ #define TDA9875_MUTE_ON 0xff /* general mute */ #define TDA9875_MUTE_OFF 0xcc /* general no mute */ /* Begin code */ static int tda9875_write(struct i2c_client *client, int subaddr, unsigned char val) { unsigned char buffer[2]; dprintk("In tda9875_write\n"); dprintk("Writing %d 0x%x\n", subaddr, val); buffer[0] = subaddr; buffer[1] = val; if (2 != i2c_master_send(client,buffer,2)) { printk(KERN_WARNING "tda9875: I/O error, trying (write %d 0x%x)\n", subaddr, val); return -1; } return 0; } static int i2c_read_register(struct i2c_adapter *adap, int addr, int reg) { unsigned char write[1]; unsigned char read[1]; struct i2c_msg msgs[2] = { { addr, 0, 1, write }, { addr, I2C_M_RD, 1, read } }; write[0] = reg; if (2 != i2c_transfer(adap,msgs,2)) { printk(KERN_WARNING "tda9875: I/O error (read2)\n"); return -1; } dprintk("tda9875: chip_read2: reg%d=0x%x\n",reg,read[0]); return read[0]; } static void tda9875_set(struct i2c_client *client) { struct tda9875 *tda = i2c_get_clientdata(client); unsigned char a; dprintk(KERN_DEBUG "tda9875_set(%04x,%04x,%04x,%04x)\n", tda->lvol,tda->rvol,tda->bass,tda->treble); a = tda->lvol & 0xff; tda9875_write(client, TDA9875_MVL, a); a =tda->rvol & 0xff; tda9875_write(client, TDA9875_MVR, a); a =tda->bass & 0xff; tda9875_write(client, TDA9875_MBA, a); a =tda->treble & 0xff; tda9875_write(client, TDA9875_MTR, a); } static void do_tda9875_init(struct i2c_client *client) { struct tda9875 *t = i2c_get_clientdata(client); dprintk("In tda9875_init\n"); tda9875_write(client, TDA9875_CFG, 0xd0 ); /*reg de config 0 (reset)*/ tda9875_write(client, TDA9875_MSR, 0x03 ); /* Monitor 0b00000XXX*/ tda9875_write(client, TDA9875_C1MSB, 0x00 ); /*Car1(FM) MSB XMHz*/ tda9875_write(client, TDA9875_C1MIB, 0x00 ); /*Car1(FM) MIB XMHz*/ tda9875_write(client, TDA9875_C1LSB, 0x00 ); /*Car1(FM) LSB XMHz*/ tda9875_write(client, TDA9875_C2MSB, 0x00 ); /*Car2(NICAM) MSB XMHz*/ tda9875_write(client, TDA9875_C2MIB, 0x00 ); /*Car2(NICAM) MIB XMHz*/ tda9875_write(client, TDA9875_C2LSB, 0x00 ); /*Car2(NICAM) LSB XMHz*/ tda9875_write(client, TDA9875_DCR, 0x00 ); /*Demod config 0x00*/ tda9875_write(client, TDA9875_DEEM, 0x44 ); /*DE-Emph 0b0100 0100*/ tda9875_write(client, TDA9875_FMAT, 0x00 ); /*FM Matrix reg 0x00*/ tda9875_write(client, TDA9875_SC1, 0x00 ); /* SCART 1 (SC1)*/ tda9875_write(client, TDA9875_SC2, 0x01 ); /* SCART 2 (sc2)*/ tda9875_write(client, TDA9875_CH1V, 0x10 ); /* Channel volume 1 mute*/ tda9875_write(client, TDA9875_CH2V, 0x10 ); /* Channel volume 2 mute */ tda9875_write(client, TDA9875_DACOS, 0x02 ); /* sig DAC i/o(in:nicam)*/ tda9875_write(client, TDA9875_ADCIS, 0x6f ); /* sig ADC input(in:mono)*/ tda9875_write(client, TDA9875_LOSR, 0x00 ); /* line out (in:mono)*/ tda9875_write(client, TDA9875_AER, 0x00 ); /*06 Effect (AVL+PSEUDO) */ tda9875_write(client, TDA9875_MCS, 0x44 ); /* Main ch select (DAC) */ tda9875_write(client, TDA9875_MVL, 0x03 ); /* Vol Main left 10dB */ tda9875_write(client, TDA9875_MVR, 0x03 ); /* Vol Main right 10dB*/ tda9875_write(client, TDA9875_MBA, 0x00 ); /* Main Bass Main 0dB*/ tda9875_write(client, TDA9875_MTR, 0x00 ); /* Main Treble Main 0dB*/ tda9875_write(client, TDA9875_ACS, 0x44 ); /* Aux chan select (dac)*/ tda9875_write(client, TDA9875_AVL, 0x00 ); /* Vol Aux left 0dB*/ tda9875_write(client, TDA9875_AVR, 0x00 ); /* Vol Aux right 0dB*/ tda9875_write(client, TDA9875_ABA, 0x00 ); /* Aux Bass Main 0dB*/ tda9875_write(client, TDA9875_ATR, 0x00 ); /* Aux Aigus Main 0dB*/ tda9875_write(client, TDA9875_MUT, 0xcc ); /* General mute */ t->lvol=t->rvol =0; /* 0dB */ t->bass=0; /* 0dB */ t->treble=0; /* 0dB */ tda9875_set(client); } /* *********************** * * i2c interface functions * * *********************** */ static int tda9875_checkit(struct i2c_adapter *adap, int addr) { int dic,rev; dic=i2c_read_register(adap,addr,254); rev=i2c_read_register(adap,addr,255); if(dic==0 || dic==2) { // tda9875 and tda9875A printk("tda9875: TDA9875%s Rev.%d detected at 0x%x\n", dic==0?"":"A", rev,addr<<1); return 1; } printk("tda9875: no such chip at 0x%x (dic=0x%x rev=0x%x)\n",addr<<1,dic,rev); return(0); } static int tda9875_attach(struct i2c_adapter *adap, int addr, int kind) { struct tda9875 *t; struct i2c_client *client; dprintk("In tda9875_attach\n"); t = kzalloc(sizeof *t,GFP_KERNEL); if (!t) return -ENOMEM; client = &t->c; memcpy(client,&client_template,sizeof(struct i2c_client)); client->adapter = adap; client->addr = addr; i2c_set_clientdata(client, t); if(!tda9875_checkit(adap,addr)) { kfree(t); return 1; } do_tda9875_init(client); printk(KERN_INFO "tda9875: init\n"); i2c_attach_client(client); return 0; } static int tda9875_probe(struct i2c_adapter *adap) { if (adap->class & I2C_CLASS_TV_ANALOG) return i2c_probe(adap, &addr_data, tda9875_attach); return 0; } static int tda9875_detach(struct i2c_client *client) { struct tda9875 *t = i2c_get_clientdata(client); do_tda9875_init(client); i2c_detach_client(client); kfree(t); return 0; } static int tda9875_command(struct i2c_client *client, unsigned int cmd, void *arg) { struct tda9875 *t = i2c_get_clientdata(client); dprintk("In tda9875_command...\n"); switch (cmd) { /* --- v4l ioctls --- */ /* take care: bttv does userspace copying, we'll get a kernel pointer here... */ case VIDIOCGAUDIO: { struct video_audio *va = arg; int left,right; dprintk("VIDIOCGAUDIO\n"); va->flags |= VIDEO_AUDIO_VOLUME | VIDEO_AUDIO_BASS | VIDEO_AUDIO_TREBLE; /* min is -84 max is 24 */ left = (t->lvol+84)*606; right = (t->rvol+84)*606; va->volume=max(left,right); va->balance=(32768*min(left,right))/ (va->volume ? va->volume : 1); va->balance=(leftbalance) : va->balance; va->bass = (t->bass+12)*2427; /* min -12 max +15 */ va->treble = (t->treble+12)*2730;/* min -12 max +12 */ va->mode |= VIDEO_SOUND_MONO; break; /* VIDIOCGAUDIO case */ } case VIDIOCSAUDIO: { struct video_audio *va = arg; int left,right; dprintk("VIDEOCSAUDIO...\n"); left = (min(65536 - va->balance,32768) * va->volume) / 32768; right = (min(va->balance,(__u16)32768) * va->volume) / 32768; t->lvol = ((left/606)-84) & 0xff; if (t->lvol > 24) t->lvol = 24; if (t->lvol < -84) t->lvol = -84 & 0xff; t->rvol = ((right/606)-84) & 0xff; if (t->rvol > 24) t->rvol = 24; if (t->rvol < -84) t->rvol = -84 & 0xff; t->bass = ((va->bass/2400)-12) & 0xff; if (t->bass > 15) t->bass = 15; if (t->bass < -12) t->bass = -12 & 0xff; t->treble = ((va->treble/2700)-12) & 0xff; if (t->treble > 12) t->treble = 12; if (t->treble < -12) t->treble = -12 & 0xff; //printk("tda9875 bal:%04x vol:%04x bass:%04x treble:%04x\n",va->balance,va->volume,va->bass,va->treble); tda9875_set(client); break; } /* end of VIDEOCSAUDIO case */ default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */ /* nothing */ dprintk("Default\n"); } /* end of (cmd) switch */ return 0; } static struct i2c_driver driver = { .driver = { .name = "tda9875", }, .id = I2C_DRIVERID_TDA9875, .attach_adapter = tda9875_probe, .detach_client = tda9875_detach, .command = tda9875_command, }; static struct i2c_client client_template = { .name = "tda9875", .driver = &driver, }; static int __init tda9875_init(void) { return i2c_add_driver(&driver); } static void __exit tda9875_fini(void) { i2c_del_driver(&driver); } module_init(tda9875_init); module_exit(tda9875_fini); /* * Local variables: * c-basic-offset: 8 * End: */