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author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-08-14 19:23:43 (GMT) |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-08-15 19:42:14 (GMT) |
commit | cb7a01ac324bf2ee2c666f37ac867e4135f9785a (patch) | |
tree | 7246b915a9334d4bc823c93ba9acab65ef882678 /drivers/media/i2c/tda7432.c | |
parent | f0af8fa4dad0839f844fd0633e1936493f6d685a (diff) | |
download | linux-cb7a01ac324bf2ee2c666f37ac867e4135f9785a.tar.xz |
[media] move i2c files into drivers/media/i2c
Move ancillary I2C drivers into drivers/media/i2c, in order to
better organize them.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/i2c/tda7432.c')
-rw-r--r-- | drivers/media/i2c/tda7432.c | 485 |
1 files changed, 485 insertions, 0 deletions
diff --git a/drivers/media/i2c/tda7432.c b/drivers/media/i2c/tda7432.c new file mode 100644 index 0000000..f7707e6 --- /dev/null +++ b/drivers/media/i2c/tda7432.c @@ -0,0 +1,485 @@ +/* + * 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> + * Copyright (c) 2006 Mauro Carvalho Chehab <mchehab@infradead.org> + * 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 <linux/module.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/timer.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/slab.h> +#include <linux/videodev2.h> +#include <linux/i2c.h> + +#include <media/v4l2-device.h> +#include <media/v4l2-ioctl.h> +#include <media/i2c-addr.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_PARM_DESC(debug, "Set debugging level from 0 to 3. Default is off(0)."); +module_param(loudness, int, S_IRUGO); +MODULE_PARM_DESC(loudness, "Turn loudness on(1) else off(0). Default is off(0)."); +module_param(maxvol, int, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(maxvol, "Set maximium volume to +20dB(0) else +0dB(1). Default is +20dB(0)."); + + +/* 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, +}; + +module_i2c_driver(tda7432_driver); |