patch-2.4.0-test7 linux/drivers/char/tda7432.c
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- Lines: 506
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.4.0-test6/linux/drivers/char/tda7432.c
- Orig date:
Tue May 23 15:31:34 2000
diff -u --recursive --new-file v2.4.0-test6/linux/drivers/char/tda7432.c linux/drivers/char/tda7432.c
@@ -1,505 +0,0 @@
-/*
- * 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 <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
- *
- * 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 <linux/module.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/malloc.h>
-#include <linux/videodev.h>
-#include <linux/i2c.h>
-#include <linux/i2c-algo-bit.h>
-
-#include "bttv.h"
-#include "audiochip.h"
-
-/* This driver ID is brand new, so define it if it's not in i2c-id.h yet */
-#ifndef I2C_DRIVERID_TDA7432
- #define I2C_DRIVERID_TDA7432 27
-#endif
-
-
-MODULE_AUTHOR("Eric Sandeen <eric_sandeen@bigfoot.com>");
-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;
-};
-
-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");
- client = kmalloc(sizeof *client,GFP_KERNEL);
- if (!client)
- return -ENOMEM;
- memcpy(client,&client_template,sizeof(struct i2c_client));
- client->adapter = adap;
- client->addr = addr;
-
- client->data = t = kmalloc(sizeof *t,GFP_KERNEL);
- if (!t)
- return -ENOMEM;
- memset(t,0,sizeof *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);
- kfree(client);
- 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:
- */
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