| /* |
| * 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. |
| * |
| * Muting and tone control by Jonathan Isom <jisom@ematic.com> |
| * |
| * Copyright (c) 2000 Eric Sandeen <eric_sandeen@bigfoot.com> |
| * 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 |
| * |
| * maxvol - set maximium volume to +20db (1), default is 0db(0) |
| * |
| * |
| * Revision: 0.7 - maxvol module parm to set maximium volume 0db or +20db |
| * store if muted so we can return it |
| * change balance only if flaged to |
| * Revision: 0.6 - added tone controls |
| * Revision: 0.5 - Fixed odd balance problem |
| * Revision: 0.4 - added muting |
| * 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 <linux/module.h> |
| #include <linux/init.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 "bttv.h" |
| #include <media/audiochip.h> |
| |
| #ifndef VIDEO_AUDIO_BALANCE |
| # define VIDEO_AUDIO_BALANCE 32 |
| #endif |
| |
| MODULE_AUTHOR("Eric Sandeen <eric_sandeen@bigfoot.com>"); |
| MODULE_DESCRIPTION("bttv driver for the tda7432 audio processor chip"); |
| MODULE_LICENSE("GPL"); |
| |
| static int maxvol; |
| static int loudness; /* disable loudness by default */ |
| static int debug; /* insmod parameter */ |
| module_param(debug, int, S_IRUGO | S_IWUSR); |
| module_param(loudness, int, S_IRUGO); |
| MODULE_PARM_DESC(maxvol,"Set maximium volume to +20db (0), default is 0db(1)"); |
| module_param(maxvol, int, S_IRUGO | S_IWUSR); |
| |
| |
| /* Address to scan (I2C address of this chip) */ |
| static unsigned short normal_i2c[] = { |
| I2C_TDA7432 >> 1, |
| I2C_CLIENT_END, |
| }; |
| I2C_CLIENT_INSMOD; |
| |
| /* Structure of address and subaddresses for the tda7432 */ |
| |
| struct tda7432 { |
| int addr; |
| int input; |
| int volume; |
| int muted; |
| int bass, treble; |
| 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 (Using Attenuators Plays better with modules) |
| * 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_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 |
| #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 |
| #define TDA7432_MUTE 0x1 << 5 |
| |
| |
| /* 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... */ |
| |
| static int tda7432_set(struct i2c_client *client) |
| { |
| struct tda7432 *t = i2c_get_clientdata(client); |
| 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,0x%02x)\n", |
| t->input,t->volume,t->bass,t->treble,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->bass; |
| buf[4] = t->treble; |
| buf[5] = t->lf; |
| buf[6] = t->lr; |
| buf[7] = t->rf; |
| buf[8] = t->rr; |
| buf[9] = t->loud; |
| if (10 != i2c_master_send(client,buf,10)) { |
| 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 = i2c_get_clientdata(client); |
| 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 = 0x3b ; /* -27dB Volume */ |
| if (loudness) /* Turn loudness on? */ |
| t->volume |= TDA7432_LD_ON; |
| t->muted = VIDEO_AUDIO_MUTE; |
| t->treble = TDA7432_TREBLE_0DB; /* 0dB Treble */ |
| t->bass = 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, 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; |
| i2c_set_clientdata(client, t); |
| |
| do_tda7432_init(client); |
| printk(KERN_INFO "tda7432: init\n"); |
| |
| i2c_attach_client(client); |
| return 0; |
| } |
| |
| static int tda7432_probe(struct i2c_adapter *adap) |
| { |
| #ifdef I2C_CLASS_TV_ANALOG |
| if (adap->class & I2C_CLASS_TV_ANALOG) |
| return i2c_probe(adap, &addr_data, tda7432_attach); |
| #else |
| if (adap->id == I2C_HW_B_BT848) |
| return i2c_probe(adap, &addr_data, tda7432_attach); |
| #endif |
| return 0; |
| } |
| |
| static int tda7432_detach(struct i2c_client *client) |
| { |
| struct tda7432 *t = i2c_get_clientdata(client); |
| |
| do_tda7432_init(client); |
| i2c_detach_client(client); |
| |
| kfree(t); |
| return 0; |
| } |
| |
| static int tda7432_command(struct i2c_client *client, |
| unsigned int cmd, void *arg) |
| { |
| struct tda7432 *t = i2c_get_clientdata(client); |
| d2printk("tda7432: In tda7432_command\n"); |
| |
| 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 | |
| VIDEO_AUDIO_MUTABLE; |
| if (t->muted) |
| va->flags |= VIDEO_AUDIO_MUTE; |
| va->mode |= VIDEO_SOUND_STEREO; |
| /* Master volume control |
| * V4L volume is min 0, max 65535 |
| * TDA7432 Volume: |
| * Min (-79dB) is 0x6f |
| * Max (+20dB) is 0x07 (630) |
| * Max (0dB) is 0x20 (829) |
| * (Mask out bit 7 of vol - it's for the loudness setting) |
| */ |
| if (!maxvol){ /* max +20db */ |
| va->volume = ( 0x6f - (t->volume & 0x7F) ) * 630; |
| } else { /* max 0db */ |
| va->volume = ( 0x6f - (t->volume & 0x7F) ) * 829; |
| } |
| |
| /* 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 4 bits each */ |
| va->bass=t->bass; |
| if(va->bass >= 0x8) |
| va->bass = ~(va->bass - 0x8) & 0xf; |
| va->bass = (va->bass << 12)+(va->bass << 8)+(va->bass << 4)+(va->bass); |
| va->treble=t->treble; |
| if(va->treble >= 0x8) |
| va->treble = ~(va->treble - 0x8) & 0xf; |
| va->treble = (va->treble << 12)+(va->treble << 8)+(va->treble << 4)+(va->treble); |
| |
| break; /* VIDIOCGAUDIO case */ |
| } |
| |
| /* Set card - scale from V4L settings to TDA7432 settings */ |
| case VIDIOCSAUDIO: |
| { |
| struct video_audio *va = arg; |
| dprintk("tda7432: VIDEOCSAUDIO\n"); |
| |
| if(va->flags & VIDEO_AUDIO_VOLUME){ |
| if(!maxvol){ /* max +20db */ |
| t->volume = 0x6f - ((va->volume)/630); |
| } else { /* max 0db */ |
| t->volume = 0x6f - ((va->volume)/829); |
| } |
| |
| if (loudness) /* Turn on the loudness bit */ |
| t->volume |= TDA7432_LD_ON; |
| |
| tda7432_write(client,TDA7432_VL, t->volume); |
| } |
| |
| if(va->flags & VIDEO_AUDIO_BASS) |
| { |
| t->bass = va->bass >> 12; |
| if(t->bass>= 0x8) |
| t->bass = (~t->bass & 0xf) + 0x8 ; |
| } |
| if(va->flags & VIDEO_AUDIO_TREBLE) |
| { |
| t->treble= va->treble >> 12; |
| if(t->treble>= 0x8) |
| t->treble = (~t->treble & 0xf) + 0x8 ; |
| } |
| if(va->flags & (VIDEO_AUDIO_TREBLE| VIDEO_AUDIO_BASS)) |
| tda7432_write(client,TDA7432_TN, 0x10 | (t->bass << 4) | t->treble ); |
| |
| if(va->flags & VIDEO_AUDIO_BALANCE) { |
| if (va->balance < 32768) |
| { |
| /* shifted to left, attenuate right */ |
| t->rr = (32768 - va->balance)/1057; |
| t->rf = t->rr; |
| t->lr = TDA7432_ATTEN_0DB; |
| t->lf = TDA7432_ATTEN_0DB; |
| } |
| else if(va->balance > 32769) |
| { |
| /* shifted to right, attenuate left */ |
| t->lf = (va->balance - 32768)/1057; |
| t->lr = t->lf; |
| t->rr = TDA7432_ATTEN_0DB; |
| t->rf = TDA7432_ATTEN_0DB; |
| } |
| else |
| { |
| /* centered */ |
| t->rr = TDA7432_ATTEN_0DB; |
| t->rf = TDA7432_ATTEN_0DB; |
| t->lf = TDA7432_ATTEN_0DB; |
| t->lr = TDA7432_ATTEN_0DB; |
| } |
| } |
| |
| t->muted=(va->flags & VIDEO_AUDIO_MUTE); |
| if (t->muted) |
| { |
| /* Mute & update balance*/ |
| tda7432_write(client,TDA7432_LF, t->lf | TDA7432_MUTE); |
| tda7432_write(client,TDA7432_LR, t->lr | TDA7432_MUTE); |
| tda7432_write(client,TDA7432_RF, t->rf | TDA7432_MUTE); |
| tda7432_write(client,TDA7432_RR, t->rr | TDA7432_MUTE); |
| } else { |
| 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 = { |
| .owner = THIS_MODULE, |
| .name = "i2c tda7432 driver", |
| .id = I2C_DRIVERID_TDA7432, |
| .flags = I2C_DF_NOTIFY, |
| .attach_adapter = tda7432_probe, |
| .detach_client = tda7432_detach, |
| .command = tda7432_command, |
| }; |
| |
| static struct i2c_client client_template = |
| { |
| .name = "tda7432", |
| .driver = &driver, |
| }; |
| |
| static int __init tda7432_init(void) |
| { |
| if ( (loudness < 0) || (loudness > 15) ) { |
| printk(KERN_ERR "tda7432: loudness parameter must be between 0 and 15\n"); |
| return -EINVAL; |
| } |
| |
| return i2c_add_driver(&driver); |
| } |
| |
| static void __exit tda7432_fini(void) |
| { |
| i2c_del_driver(&driver); |
| } |
| |
| module_init(tda7432_init); |
| module_exit(tda7432_fini); |
| |
| /* |
| * Local variables: |
| * c-basic-offset: 8 |
| * End: |
| */ |