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path: root/drivers/media/video/tda7432.c
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Diffstat (limited to 'drivers/media/video/tda7432.c')
-rw-r--r--drivers/media/video/tda7432.c556
1 files changed, 556 insertions, 0 deletions
diff --git a/drivers/media/video/tda7432.c b/drivers/media/video/tda7432.c
new file mode 100644
index 00000000000..376a4a439e9
--- /dev/null
+++ b/drivers/media/video/tda7432.c
@@ -0,0 +1,556 @@
+/*
+ * 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>
+#include <media/id.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,
+};
+static unsigned short normal_i2c_range[] = { I2C_CLIENT_END, 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... */
+#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 = 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_ALGO_BIT | 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 =
+{
+ I2C_DEVNAME("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:
+ */
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