/* * 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 * * Copyright (c) 2000 Eric Sandeen * Copyright (c) 2006 Mauro Carvalho Chehab * 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) */ #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef VIDEO_AUDIO_BALANCE # define VIDEO_AUDIO_BALANCE 32 #endif MODULE_AUTHOR("Eric Sandeen "); 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); /* Structure of address and subaddresses for the tda7432 */ struct tda7432 { struct v4l2_subdev sd; int addr; int input; int volume; int muted; int bass, treble; int lf, lr, rf, rr; int loud; }; static inline struct tda7432 *to_state(struct v4l2_subdev *sd) { return container_of(sd, struct tda7432, sd); } /* 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 v4l2_subdev *sd, int subaddr, int val) { struct i2c_client *client = v4l2_get_subdevdata(sd); unsigned char buffer[2]; v4l2_dbg(2, debug, sd, "In tda7432_write\n"); v4l2_dbg(1, debug, sd, "Writing %d 0x%x\n", subaddr, val); buffer[0] = subaddr; buffer[1] = val; if (2 != i2c_master_send(client, buffer, 2)) { v4l2_err(sd, "I/O error, trying (write %d 0x%x)\n", subaddr, val); return -1; } return 0; } static int tda7432_set(struct v4l2_subdev *sd) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct tda7432 *t = to_state(sd); unsigned char buf[16]; v4l2_dbg(1, debug, sd, "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)) { v4l2_err(sd, "I/O error, trying tda7432_set\n"); return -1; } return 0; } static void do_tda7432_init(struct v4l2_subdev *sd) { struct tda7432 *t = to_state(sd); v4l2_dbg(2, debug, sd, "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 = 1; 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(sd); } static int tda7432_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) { struct tda7432 *t = to_state(sd); switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: ctrl->value=t->muted; return 0; case V4L2_CID_AUDIO_VOLUME: if (!maxvol){ /* max +20db */ ctrl->value = ( 0x6f - (t->volume & 0x7F) ) * 630; } else { /* max 0db */ ctrl->value = ( 0x6f - (t->volume & 0x7F) ) * 829; } return 0; case V4L2_CID_AUDIO_BALANCE: { if ( (t->lf) < (t->rf) ) /* right is attenuated, balance shifted left */ ctrl->value = (32768 - 1057*(t->rf)); else /* left is attenuated, balance shifted right */ ctrl->value = (32768 + 1057*(t->lf)); return 0; } case V4L2_CID_AUDIO_BASS: { /* Bass/treble 4 bits each */ int bass=t->bass; if(bass >= 0x8) bass = ~(bass - 0x8) & 0xf; ctrl->value = (bass << 12)+(bass << 8)+(bass << 4)+(bass); return 0; } case V4L2_CID_AUDIO_TREBLE: { int treble=t->treble; if(treble >= 0x8) treble = ~(treble - 0x8) & 0xf; ctrl->value = (treble << 12)+(treble << 8)+(treble << 4)+(treble); return 0; } } return -EINVAL; } static int tda7432_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) { struct tda7432 *t = to_state(sd); switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: t->muted=ctrl->value; break; case V4L2_CID_AUDIO_VOLUME: if(!maxvol){ /* max +20db */ t->volume = 0x6f - ((ctrl->value)/630); } else { /* max 0db */ t->volume = 0x6f - ((ctrl->value)/829); } if (loudness) /* Turn on the loudness bit */ t->volume |= TDA7432_LD_ON; tda7432_write(sd, TDA7432_VL, t->volume); return 0; case V4L2_CID_AUDIO_BALANCE: if (ctrl->value < 32768) { /* shifted to left, attenuate right */ t->rr = (32768 - ctrl->value)/1057; t->rf = t->rr; t->lr = TDA7432_ATTEN_0DB; t->lf = TDA7432_ATTEN_0DB; } else if(ctrl->value > 32769) { /* shifted to right, attenuate left */ t->lf = (ctrl->value - 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; } break; case V4L2_CID_AUDIO_BASS: t->bass = ctrl->value >> 12; if(t->bass>= 0x8) t->bass = (~t->bass & 0xf) + 0x8 ; tda7432_write(sd, TDA7432_TN, 0x10 | (t->bass << 4) | t->treble); return 0; case V4L2_CID_AUDIO_TREBLE: t->treble= ctrl->value >> 12; if(t->treble>= 0x8) t->treble = (~t->treble & 0xf) + 0x8 ; tda7432_write(sd, TDA7432_TN, 0x10 | (t->bass << 4) | t->treble); return 0; default: return -EINVAL; } /* Used for both mute and balance changes */ if (t->muted) { /* Mute & update balance*/ tda7432_write(sd, TDA7432_LF, t->lf | TDA7432_MUTE); tda7432_write(sd, TDA7432_LR, t->lr | TDA7432_MUTE); tda7432_write(sd, TDA7432_RF, t->rf | TDA7432_MUTE); tda7432_write(sd, TDA7432_RR, t->rr | TDA7432_MUTE); } else { tda7432_write(sd, TDA7432_LF, t->lf); tda7432_write(sd, TDA7432_LR, t->lr); tda7432_write(sd, TDA7432_RF, t->rf); tda7432_write(sd, TDA7432_RR, t->rr); } return 0; } static int tda7432_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc) { switch (qc->id) { case V4L2_CID_AUDIO_VOLUME: return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 58880); case V4L2_CID_AUDIO_MUTE: return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0); case V4L2_CID_AUDIO_BALANCE: case V4L2_CID_AUDIO_BASS: case V4L2_CID_AUDIO_TREBLE: return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 32768); } return -EINVAL; } /* ----------------------------------------------------------------------- */ static const struct v4l2_subdev_core_ops tda7432_core_ops = { .queryctrl = tda7432_queryctrl, .g_ctrl = tda7432_g_ctrl, .s_ctrl = tda7432_s_ctrl, }; static const struct v4l2_subdev_ops tda7432_ops = { .core = &tda7432_core_ops, }; /* ----------------------------------------------------------------------- */ /* *********************** * * i2c interface functions * * *********************** */ static int tda7432_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct tda7432 *t; struct v4l2_subdev *sd; v4l_info(client, "chip found @ 0x%02x (%s)\n", client->addr << 1, client->adapter->name); t = kzalloc(sizeof(*t), GFP_KERNEL); if (!t) return -ENOMEM; sd = &t->sd; v4l2_i2c_subdev_init(sd, client, &tda7432_ops); if (loudness < 0 || loudness > 15) { v4l2_warn(sd, "loudness parameter must be between 0 and 15\n"); if (loudness < 0) loudness = 0; if (loudness > 15) loudness = 15; } do_tda7432_init(sd); return 0; } static int tda7432_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); do_tda7432_init(sd); v4l2_device_unregister_subdev(sd); kfree(to_state(sd)); return 0; } static const struct i2c_device_id tda7432_id[] = { { "tda7432", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, tda7432_id); static struct i2c_driver tda7432_driver = { .driver = { .owner = THIS_MODULE, .name = "tda7432", }, .probe = tda7432_probe, .remove = tda7432_remove, .id_table = tda7432_id, }; static __init int init_tda7432(void) { return i2c_add_driver(&tda7432_driver); } static __exit void exit_tda7432(void) { i2c_del_driver(&tda7432_driver); } module_init(init_tda7432); module_exit(exit_tda7432);