/* * For the STS-Thompson TDA7432 audio processor chip * * Handles audio functions: volume, balance, tone, loudness * This driver will not complain if used with any * other i2c device with the same address. * * Copyright (c) 2000 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 * set to 2 if you'd like to be inundated with debug messages * * loudness - set between 0 and 15 for varying degrees of loudness effect * * TODO: * Implement tone controls * * Revision: 0.3 - Fixed silly reversed volume controls. :) * Revision: 0.2 - Cleaned up #defines * fixed volume control * Added I2C_DRIVERID_TDA7432 * added loudness insmod control * Revision: 0.1 - initial version */ #include #include #include #include #include #include #include #include #include #include #include #include "bttv.h" #include "audiochip.h" #include "id.h" MODULE_AUTHOR("Eric Sandeen "); MODULE_DESCRIPTION("bttv driver for the tda7432 audio processor chip"); MODULE_PARM(debug,"i"); MODULE_PARM(loudness,"i"); static int loudness = 0; /* disable loudness by default */ static int debug = 0; /* insmod parameter */ /* Address to scan (I2C address of this chip) */ static unsigned short normal_i2c[] = { I2C_TDA7432 >> 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 }; /* Structure of address and subaddresses for the tda7432 */ struct tda7432 { int addr; int input; int volume; int tone; int lf, lr, rf, rr; int loud; struct i2c_client c; }; static struct i2c_driver driver; static struct i2c_client client_template; #define dprintk if (debug) printk #define d2printk if (debug > 1) printk /* The TDA7432 is made by STS-Thompson * http://www.st.com * http://us.st.com/stonline/books/pdf/docs/4056.pdf * * TDA7432: I2C-bus controlled basic audio processor * * The TDA7432 controls basic audio functions like volume, balance, * and tone control (including loudness). It also has four channel * output (for front and rear). Since most vidcap cards probably * don't have 4 channel output, this driver will set front & rear * together (no independent control). */ /* Subaddresses for TDA7432 */ #define TDA7432_IN 0x00 /* Input select */ #define TDA7432_VL 0x01 /* Volume */ #define TDA7432_TN 0x02 /* Bass, Treble (Tone) */ #define TDA7432_LF 0x03 /* Attenuation LF (Left Front) */ #define TDA7432_LR 0x04 /* Attenuation LR (Left Rear) */ #define TDA7432_RF 0x05 /* Attenuation RF (Right Front) */ #define TDA7432_RR 0x06 /* Attenuation RR (Right Rear) */ #define TDA7432_LD 0x07 /* Loudness */ /* Masks for bits in TDA7432 subaddresses */ /* Many of these not used - just for documentation */ /* Subaddress 0x00 - Input selection and bass control */ /* Bits 0,1,2 control input: * 0x00 - Stereo input * 0x02 - Mono input * 0x03 - Mute * Mono probably isn't used - I'm guessing only the stereo * input is connected on most cards, so we'll set it to stereo. * * Bit 3 controls bass cut: 0/1 is non-symmetric/symmetric bass cut * Bit 4 controls bass range: 0/1 is extended/standard bass range * * Highest 3 bits not used */ #define TDA7432_STEREO_IN 0 #define TDA7432_MONO_IN 2 /* Probably won't be used */ #define TDA7432_MUTE 3 /* Probably won't be used */ #define TDA7432_BASS_SYM 1 << 3 #define TDA7432_BASS_NORM 1 << 4 /* Subaddress 0x01 - Volume */ /* Lower 7 bits control volume from -79dB to +32dB in 1dB steps * Recommended maximum is +20 dB * * +32dB: 0x00 * +20dB: 0x0c * 0dB: 0x20 * -79dB: 0x6f * * MSB (bit 7) controls loudness: 1/0 is loudness on/off */ #define TDA7432_VOL_0DB 0x20 #define TDA7432_LD_ON 1 << 7 /* Subaddress 0x02 - Tone control */ /* Bits 0,1,2 control absolute treble gain from 0dB to 14dB * 0x0 is 14dB, 0x7 is 0dB * * Bit 3 controls treble attenuation/gain (sign) * 1 = gain (+) * 0 = attenuation (-) * * Bits 4,5,6 control absolute bass gain from 0dB to 14dB * (This is only true for normal base range, set in 0x00) * 0x0 << 4 is 14dB, 0x7 is 0dB * * Bit 7 controls bass attenuation/gain (sign) * 1 << 7 = gain (+) * 0 << 7 = attenuation (-) * * Example: * 1 1 0 1 0 1 0 1 is +4dB bass, -4dB treble */ #define TDA7432_TREBLE_0DB 0xf #define TDA7432_TREBLE 7 #define TDA7432_TREBLE_GAIN 1 << 3 #define TDA7432_BASS_0DB 0xf << 4 #define TDA7432_BASS 7 << 4 #define TDA7432_BASS_GAIN 1 << 7 /* Subaddress 0x03 - Left Front attenuation */ /* Subaddress 0x04 - Left Rear attenuation */ /* Subaddress 0x05 - Right Front attenuation */ /* Subaddress 0x06 - Right Rear attenuation */ /* Bits 0,1,2,3,4 control attenuation from 0dB to -37.5dB * in 1.5dB steps. * * 0x00 is 0dB * 0x1f is -37.5dB * * Bit 5 mutes that channel when set (1 = mute, 0 = unmute) * We'll use the mute on the input, though (above) * Bits 6,7 unused */ #define TDA7432_ATTEN_0DB 0x00 /* Subaddress 0x07 - Loudness Control */ /* Bits 0,1,2,3 control loudness from 0dB to -15dB in 1dB steps * when bit 4 is NOT set * * 0x0 is 0dB * 0xf is -15dB * * If bit 4 is set, then there is a flat attenuation according to * the lower 4 bits, as above. * * Bits 5,6,7 unused */ /* Begin code */ static int tda7432_write(struct i2c_client *client, int subaddr, int val) { unsigned char buffer[2]; d2printk("tda7432: In tda7432_write\n"); dprintk("tda7432: Writing %d 0x%x\n", subaddr, val); buffer[0] = subaddr; buffer[1] = val; if (2 != i2c_master_send(client,buffer,2)) { printk(KERN_WARNING "tda7432: I/O error, trying (write %d 0x%x)\n", subaddr, val); return -1; } return 0; } /* I don't think we ever actually _read_ the chip... */ #if 0 static int tda7432_read(struct i2c_client *client) { unsigned char buffer; d2printk("tda7432: In tda7432_read\n"); if (1 != i2c_master_recv(client,&buffer,1)) { printk(KERN_WARNING "tda7432: I/O error, trying (read)\n"); return -1; } dprintk("tda7432: Read 0x%02x\n", buffer); return buffer; } #endif static int tda7432_set(struct i2c_client *client) { struct tda7432 *t = client->data; unsigned char buf[16]; d2printk("tda7432: In tda7432_set\n"); dprintk(KERN_INFO "tda7432: 7432_set(0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x)\n", t->input,t->volume,t->tone,t->lf,t->lr,t->rf,t->rr,t->loud); buf[0] = TDA7432_IN; buf[1] = t->input; buf[2] = t->volume; buf[3] = t->tone; buf[4] = t->lf; buf[5] = t->lr; buf[6] = t->rf; buf[7] = t->rr; buf[8] = t->loud; if (9 != i2c_master_send(client,buf,9)) { printk(KERN_WARNING "tda7432: I/O error, trying tda7432_set\n"); return -1; } return 0; } static void do_tda7432_init(struct i2c_client *client) { struct tda7432 *t = client->data; d2printk("tda7432: In tda7432_init\n"); t->input = TDA7432_STEREO_IN | /* Main (stereo) input */ TDA7432_BASS_SYM | /* Symmetric bass cut */ TDA7432_BASS_NORM; /* Normal bass range */ t->volume = TDA7432_VOL_0DB; /* 0dB Volume */ if (loudness) /* Turn loudness on? */ t->volume |= TDA7432_LD_ON; t->tone = TDA7432_TREBLE_0DB | /* 0dB Treble */ TDA7432_BASS_0DB; /* 0dB Bass */ t->lf = TDA7432_ATTEN_0DB; /* 0dB attenuation */ t->lr = TDA7432_ATTEN_0DB; /* 0dB attenuation */ t->rf = TDA7432_ATTEN_0DB; /* 0dB attenuation */ t->rr = TDA7432_ATTEN_0DB; /* 0dB attenuation */ t->loud = loudness; /* insmod parameter */ tda7432_set(client); } /* *********************** * * i2c interface functions * * *********************** */ static int tda7432_attach(struct i2c_adapter *adap, int addr, unsigned short flags, int kind) { struct tda7432 *t; struct i2c_client *client; d2printk("tda7432: In tda7432_attach\n"); t = kmalloc(sizeof *t,GFP_KERNEL); if (!t) return -ENOMEM; memset(t,0,sizeof *t); client = &t->c; memcpy(client,&client_template,sizeof(struct i2c_client)); client->adapter = adap; client->addr = addr; client->data = t; do_tda7432_init(client); MOD_INC_USE_COUNT; strcpy(client->name,"TDA7432"); printk(KERN_INFO "tda7432: init\n"); i2c_attach_client(client); return 0; } static int tda7432_probe(struct i2c_adapter *adap) { if (adap->id == (I2C_ALGO_BIT | I2C_HW_B_BT848)) return i2c_probe(adap, &addr_data, tda7432_attach); return 0; } static int tda7432_detach(struct i2c_client *client) { struct tda7432 *t = client->data; do_tda7432_init(client); i2c_detach_client(client); kfree(t); MOD_DEC_USE_COUNT; return 0; } static int tda7432_command(struct i2c_client *client, unsigned int cmd, void *arg) { struct tda7432 *t = client->data; d2printk("tda7432: In tda7432_command\n"); #if 0 __u16 *sarg = arg; #endif switch (cmd) { /* --- v4l ioctls --- */ /* take care: bttv does userspace copying, we'll get a kernel pointer here... */ /* Query card - scale from TDA7432 settings to V4L settings */ case VIDIOCGAUDIO: { struct video_audio *va = arg; dprintk("tda7432: VIDIOCGAUDIO\n"); va->flags |= VIDEO_AUDIO_VOLUME | VIDEO_AUDIO_BASS | VIDEO_AUDIO_TREBLE; /* Master volume control * V4L volume is min 0, max 65535 * TDA7432 Volume: * Min (-79dB) is 0x6f * Max (+20dB) is 0x07 * (Mask out bit 7 of vol - it's for the loudness setting) */ va->volume = ( 0x6f - (t->volume & 0x7F) ) * 630; /* Balance depends on L,R attenuation * V4L balance is 0 to 65535, middle is 32768 * TDA7432 attenuation: min (0dB) is 0, max (-37.5dB) is 0x1f * to scale up to V4L numbers, mult by 1057 * attenuation exists for lf, lr, rf, rr * we use only lf and rf (front channels) */ if ( (t->lf) < (t->rf) ) /* right is attenuated, balance shifted left */ va->balance = (32768 - 1057*(t->rf)); else /* left is attenuated, balance shifted right */ va->balance = (32768 + 1057*(t->lf)); /* Bass/treble */ va->bass = 32768; /* brain hurts... set to middle for now */ va->treble = 32768; /* brain hurts... set to middle for now */ break; /* VIDIOCGAUDIO case */ } /* Set card - scale from V4L settings to TDA7432 settings */ case VIDIOCSAUDIO: { struct video_audio *va = arg; dprintk("tda7432: VIDEOCSAUDIO\n"); t->volume = 0x6f - ( (va->volume)/630 ); if (loudness) /* Turn on the loudness bit */ t->volume |= TDA7432_LD_ON; if (va->balance < 32768) { /* shifted to left, attenuate right */ t->rr = (32768 - va->balance)/1057; t->rf = t->rr; } else { /* shifted to right, attenuate left */ t->lf = (va->balance - 32768)/1057; t->lr = t->lf; } /* t->tone = 0xff; */ /* Brain hurts - no tone control for now... */ tda7432_write(client,TDA7432_VL, t->volume); /* tda7432_write(client,TDA7432_TN, t->tone); */ tda7432_write(client,TDA7432_LF, t->lf); tda7432_write(client,TDA7432_LR, t->lr); tda7432_write(client,TDA7432_RF, t->rf); tda7432_write(client,TDA7432_RR, t->rr); break; } /* end of VIDEOCSAUDIO case */ default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */ /* nothing */ d2printk("tda7432: Default\n"); } /* end of (cmd) switch */ return 0; } static struct i2c_driver driver = { "i2c tda7432 driver", I2C_DRIVERID_TDA7432, I2C_DF_NOTIFY, tda7432_probe, tda7432_detach, tda7432_command, }; static struct i2c_client client_template = { "(unset)", /* name */ -1, 0, 0, NULL, &driver }; #ifdef MODULE int init_module(void) #else int tda7432_init(void) #endif { if ( (loudness < 0) || (loudness > 15) ) { printk(KERN_ERR "tda7432: loudness parameter must be between 0 and 15\n"); return -EINVAL; } i2c_add_driver(&driver); return 0; } #ifdef MODULE void cleanup_module(void) { i2c_del_driver(&driver); } #endif /* * Local variables: * c-basic-offset: 8 * End: */